diff --git a/CMakeLists.txt b/CMakeLists.txt index 1675045..5741211 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -29,8 +29,8 @@ SET(FREETYPE2DIR ${EXTLIBDIR}/freetype2) SET(FREETYPE2SRCDIR ${FREETYPE2DIR}/src) SET(LUADIR ${EXTLIBDIR}/lua-5.1.4) SET(LUASRCDIR ${LUADIR}/src) -SET(LIBOGGDIR ${EXTLIBDIR}/libogg-1.2.0) -SET(LIBVORBISDIR ${EXTLIBDIR}/libvorbis-1.3.1) +SET(LIBOGGDIR ${EXTLIBDIR}/libogg-1.3.0) +SET(LIBVORBISDIR ${EXTLIBDIR}/libvorbis-1.3.2) SET(ZLIBDIR ${EXTLIBDIR}/glpng/zlib) SET(PNGDIR ${EXTLIBDIR}/glpng/png) diff --git a/ExternalLibs/glpng/png/png.c b/ExternalLibs/glpng/png/png.c index 819d9bf..b8cfca7 100644 --- a/ExternalLibs/glpng/png/png.c +++ b/ExternalLibs/glpng/png/png.c @@ -1,309 +1,2870 @@ - -/* png.c - location for general purpose libpng functions - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - */ - -#define PNG_INTERNAL -#define PNG_NO_EXTERN -#include "png.h" - -/* Version information for C files. This had better match the version - * string defined in png.h. - */ -char png_libpng_ver[12] = "1.0.2"; - -/* Place to hold the signature string for a PNG file. */ -png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; - -/* Constant strings for known chunk types. If you need to add a chunk, - * add a string holding the name here. If you want to make the code - * portable to EBCDIC machines, use ASCII numbers, not characters. - */ -png_byte FARDATA png_IHDR[5] = { 73, 72, 68, 82, '\0'}; -png_byte FARDATA png_IDAT[5] = { 73, 68, 65, 84, '\0'}; -png_byte FARDATA png_IEND[5] = { 73, 69, 78, 68, '\0'}; -png_byte FARDATA png_PLTE[5] = { 80, 76, 84, 69, '\0'}; -png_byte FARDATA png_bKGD[5] = { 98, 75, 71, 68, '\0'}; -png_byte FARDATA png_cHRM[5] = { 99, 72, 82, 77, '\0'}; -png_byte FARDATA png_gAMA[5] = {103, 65, 77, 65, '\0'}; -png_byte FARDATA png_hIST[5] = {104, 73, 83, 84, '\0'}; -png_byte FARDATA png_oFFs[5] = {111, 70, 70, 115, '\0'}; -png_byte FARDATA png_pCAL[5] = {112, 67, 65, 76, '\0'}; -png_byte FARDATA png_pHYs[5] = {112, 72, 89, 115, '\0'}; -png_byte FARDATA png_sBIT[5] = {115, 66, 73, 84, '\0'}; -png_byte FARDATA png_sRGB[5] = {115, 82, 71, 66, '\0'}; -png_byte FARDATA png_tEXt[5] = {116, 69, 88, 116, '\0'}; -png_byte FARDATA png_tIME[5] = {116, 73, 77, 69, '\0'}; -png_byte FARDATA png_tRNS[5] = {116, 82, 78, 83, '\0'}; -png_byte FARDATA png_zTXt[5] = {122, 84, 88, 116, '\0'}; - -/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ - -/* start of interlace block */ -int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; - -/* offset to next interlace block */ -int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; - -/* start of interlace block in the y direction */ -int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; - -/* offset to next interlace block in the y direction */ -int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; - -/* Width of interlace block. This is not currently used - if you need - * it, uncomment it here and in png.h -int FARDATA png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; -*/ - -/* Height of interlace block. This is not currently used - if you need - * it, uncomment it here and in png.h -int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; -*/ - -/* Mask to determine which pixels are valid in a pass */ -int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; - -/* Mask to determine which pixels to overwrite while displaying */ -int FARDATA png_pass_dsp_mask[] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; - - -/* Tells libpng that we have already handled the first "num_bytes" bytes - * of the PNG file signature. If the PNG data is embedded into another - * stream we can set num_bytes = 8 so that libpng will not attempt to read - * or write any of the magic bytes before it starts on the IHDR. - */ -void -png_set_sig_bytes(png_structp png_ptr, int num_bytes) -{ - png_debug(1, "in png_set_sig_bytes\n"); - if (num_bytes > 8) - png_error(png_ptr, "Too many bytes for PNG signature."); - - png_ptr->sig_bytes = num_bytes < 0 ? 0 : num_bytes; -} - -/* Checks whether the supplied bytes match the PNG signature. We allow - * checking less than the full 8-byte signature so that those apps that - * already read the first few bytes of a file to determine the file type - * can simply check the remaining bytes for extra assurance. Returns - * an integer less than, equal to, or greater than zero if sig is found, - * respectively, to be less than, to match, or be greater than the correct - * PNG signature (this is the same behaviour as strcmp, memcmp, etc). - */ -int -png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) -{ - if (num_to_check > 8) - num_to_check = 8; - else if (num_to_check < 1) - return (0); - - if (start > 7) - return (0); - - if (start + num_to_check > 8) - num_to_check = 8 - start; - - return ((int)(png_memcmp(&sig[start], &png_sig[start], num_to_check))); -} - -/* (Obsolete) function to check signature bytes. It does not allow one - * to check a partial signature. This function will be removed in the - * future - use png_sig_cmp(). - */ -int -png_check_sig(png_bytep sig, int num) -{ - return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); -} - -/* Function to allocate memory for zlib. */ -voidpf -png_zalloc(voidpf png_ptr, uInt items, uInt size) -{ - png_uint_32 num_bytes = (png_uint_32)items * size; - png_voidp ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); - - if (num_bytes > (png_uint_32)0x8000L) - { - png_memset(ptr, 0, (png_size_t)0x8000L); - png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, - (png_size_t)(num_bytes - (png_uint_32)0x8000L)); - } - else - { - png_memset(ptr, 0, (png_size_t)num_bytes); - } - return ((voidpf)ptr); -} - -/* function to free memory for zlib */ -void -png_zfree(voidpf png_ptr, voidpf ptr) -{ - png_free((png_structp)png_ptr, (png_voidp)ptr); -} - -/* Reset the CRC variable to 32 bits of 1's. Care must be taken - * in case CRC is > 32 bits to leave the top bits 0. - */ -void -png_reset_crc(png_structp png_ptr) -{ - png_ptr->crc = crc32(0, Z_NULL, 0); -} - -/* Calculate the CRC over a section of data. We can only pass as - * much data to this routine as the largest single buffer size. We - * also check that this data will actually be used before going to the - * trouble of calculating it. - */ -void -png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) -{ - int need_crc = 1; - - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - - if (need_crc) - png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); -} - -/* Allocate the memory for an info_struct for the application. We don't - * really need the png_ptr, but it could potentially be useful in the - * future. This should be used in favour of malloc(sizeof(png_info)) - * and png_info_init() so that applications that want to use a shared - * libpng don't have to be recompiled if png_info changes size. - */ -png_infop -png_create_info_struct(png_structp png_ptr) -{ - png_infop info_ptr; - - png_debug(1, "in png_create_info_struct\n"); - if(png_ptr == NULL) return (NULL); -#ifdef PNG_USER_MEM_SUPPORTED - if ((info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, - png_ptr->malloc_fn)) != NULL) -#else - if ((info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO)) != NULL) -#endif - { - png_info_init(info_ptr); - } - - return (info_ptr); -} - -/* Initialize the info structure. This is now an internal function (0.89) - * and applications using it are urged to use png_create_info_struct() - * instead. - */ -void -png_info_init(png_infop info_ptr) -{ - png_debug(1, "in png_info_init\n"); - /* set everything to 0 */ - png_memset(info_ptr, 0, sizeof (png_info)); -} - -/* This is an internal routine to free any memory that the info struct is - * pointing to before re-using it or freeing the struct itself. Recall - * that png_free() checks for NULL pointers for us. - */ -void -png_info_destroy(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) - png_debug(1, "in png_info_destroy\n"); - if (info_ptr->text != NULL) - { - int i; - for (i = 0; i < info_ptr->num_text; i++) - { - png_free(png_ptr, info_ptr->text[i].key); - } - png_free(png_ptr, info_ptr->text); - } -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - png_free(png_ptr, info_ptr->pcal_purpose); - png_free(png_ptr, info_ptr->pcal_units); - if (info_ptr->pcal_params != NULL) - { - int i; - for (i = 0; i < (int)info_ptr->pcal_nparams; i++) - { - png_free(png_ptr, info_ptr->pcal_params[i]); - } - png_free(png_ptr, info_ptr->pcal_params); - } -#endif - - png_info_init(info_ptr); -} - -/* Initialize the default input/output functions for the PNG file. If you - * use your own read or write routines, you can call either png_set_read_fn() - * or png_set_write_fn() instead of png_init_io(). - */ -void -png_init_io(png_structp png_ptr, FILE *fp) -{ - png_debug(1, "in png_init_io\n"); - png_ptr->io_ptr = (png_voidp)fp; -} - -#if defined(PNG_TIME_RFC1123_SUPPORTED) -/* Convert the supplied time into an RFC 1123 string suitable for use in - * a "Creation Time" or other text-based time string. - */ -png_charp -png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) -{ - static PNG_CONST char short_months[12][4] = - {"Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; - - if (png_ptr->time_buffer == NULL) - { - png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* - sizeof(char))); - } - -#ifdef USE_FAR_KEYWORD - { - char near_time_buf[29]; - sprintf(near_time_buf, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); - png_memcpy(png_ptr->time_buffer, near_time_buf, - 29*sizeof(char)); - } -#else - sprintf(png_ptr->time_buffer, "%d %s %d %02d:%02d:%02d +0000", - ptime->day % 32, short_months[(ptime->month - 1) % 12], - ptime->year, ptime->hour % 24, ptime->minute % 60, - ptime->second % 61); -#endif - return ((png_charp)png_ptr->time_buffer); -} -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - + +/* png.c - location for general purpose libpng functions + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "pngpriv.h" + +/* Generate a compiler error if there is an old png.h in the search path. */ +typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7; + +/* Tells libpng that we have already handled the first "num_bytes" bytes + * of the PNG file signature. If the PNG data is embedded into another + * stream we can set num_bytes = 8 so that libpng will not attempt to read + * or write any of the magic bytes before it starts on the IHDR. + */ + +#ifdef PNG_READ_SUPPORTED +void PNGAPI +png_set_sig_bytes(png_structp png_ptr, int num_bytes) +{ + png_debug(1, "in png_set_sig_bytes"); + + if (png_ptr == NULL) + return; + + if (num_bytes > 8) + png_error(png_ptr, "Too many bytes for PNG signature"); + + png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); +} + +/* Checks whether the supplied bytes match the PNG signature. We allow + * checking less than the full 8-byte signature so that those apps that + * already read the first few bytes of a file to determine the file type + * can simply check the remaining bytes for extra assurance. Returns + * an integer less than, equal to, or greater than zero if sig is found, + * respectively, to be less than, to match, or be greater than the correct + * PNG signature (this is the same behavior as strcmp, memcmp, etc). + */ +int PNGAPI +png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check) +{ + png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; + + if (num_to_check > 8) + num_to_check = 8; + + else if (num_to_check < 1) + return (-1); + + if (start > 7) + return (-1); + + if (start + num_to_check > 8) + num_to_check = 8 - start; + + return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); +} + +#endif /* PNG_READ_SUPPORTED */ + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) +/* Function to allocate memory for zlib */ +PNG_FUNCTION(voidpf /* PRIVATE */, +png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED) +{ + png_voidp ptr; + png_structp p=(png_structp)png_ptr; + png_uint_32 save_flags=p->flags; + png_alloc_size_t num_bytes; + + if (png_ptr == NULL) + return (NULL); + + if (items > PNG_UINT_32_MAX/size) + { + png_warning (p, "Potential overflow in png_zalloc()"); + return (NULL); + } + num_bytes = (png_alloc_size_t)items * size; + + p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; + ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); + p->flags=save_flags; + + return ((voidpf)ptr); +} + +/* Function to free memory for zlib */ +void /* PRIVATE */ +png_zfree(voidpf png_ptr, voidpf ptr) +{ + png_free((png_structp)png_ptr, (png_voidp)ptr); +} + +/* Reset the CRC variable to 32 bits of 1's. Care must be taken + * in case CRC is > 32 bits to leave the top bits 0. + */ +void /* PRIVATE */ +png_reset_crc(png_structp png_ptr) +{ + /* The cast is safe because the crc is a 32 bit value. */ + png_ptr->crc = (png_uint_32)crc32(0, Z_NULL, 0); +} + +/* Calculate the CRC over a section of data. We can only pass as + * much data to this routine as the largest single buffer size. We + * also check that this data will actually be used before going to the + * trouble of calculating it. + */ +void /* PRIVATE */ +png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length) +{ + int need_crc = 1; + + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) + { + if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == + (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) + need_crc = 0; + } + + else /* critical */ + { + if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) + need_crc = 0; + } + + /* 'uLong' is defined as unsigned long, this means that on some systems it is + * a 64 bit value. crc32, however, returns 32 bits so the following cast is + * safe. 'uInt' may be no more than 16 bits, so it is necessary to perform a + * loop here. + */ + if (need_crc && length > 0) + { + uLong crc = png_ptr->crc; /* Should never issue a warning */ + + do + { + uInt safeLength = (uInt)length; + if (safeLength == 0) + safeLength = (uInt)-1; /* evil, but safe */ + + crc = crc32(crc, ptr, safeLength); + + /* The following should never issue compiler warnings, if they do the + * target system has characteristics that will probably violate other + * assumptions within the libpng code. + */ + ptr += safeLength; + length -= safeLength; + } + while (length > 0); + + /* And the following is always safe because the crc is only 32 bits. */ + png_ptr->crc = (png_uint_32)crc; + } +} + +/* Check a user supplied version number, called from both read and write + * functions that create a png_struct + */ +int +png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver) +{ + if (user_png_ver) + { + int i = 0; + + do + { + if (user_png_ver[i] != png_libpng_ver[i]) + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + } while (png_libpng_ver[i++]); + } + + else + png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; + + if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) + { + /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so + * we must recompile any applications that use any older library version. + * For versions after libpng 1.0, we will be compatible, so we need + * only check the first digit. + */ + if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || + (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || + (user_png_ver[0] == '0' && user_png_ver[2] < '9')) + { +#ifdef PNG_WARNINGS_SUPPORTED + size_t pos = 0; + char m[128]; + + pos = png_safecat(m, sizeof m, pos, "Application built with libpng-"); + pos = png_safecat(m, sizeof m, pos, user_png_ver); + pos = png_safecat(m, sizeof m, pos, " but running with "); + pos = png_safecat(m, sizeof m, pos, png_libpng_ver); + + png_warning(png_ptr, m); +#endif + +#ifdef PNG_ERROR_NUMBERS_SUPPORTED + png_ptr->flags = 0; +#endif + + return 0; + } + } + + /* Success return. */ + return 1; +} + +/* Allocate the memory for an info_struct for the application. We don't + * really need the png_ptr, but it could potentially be useful in the + * future. This should be used in favour of malloc(png_sizeof(png_info)) + * and png_info_init() so that applications that want to use a shared + * libpng don't have to be recompiled if png_info changes size. + */ +PNG_FUNCTION(png_infop,PNGAPI +png_create_info_struct,(png_structp png_ptr),PNG_ALLOCATED) +{ + png_infop info_ptr; + + png_debug(1, "in png_create_info_struct"); + + if (png_ptr == NULL) + return (NULL); + +#ifdef PNG_USER_MEM_SUPPORTED + info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, + png_ptr->malloc_fn, png_ptr->mem_ptr); +#else + info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); +#endif + if (info_ptr != NULL) + png_info_init_3(&info_ptr, png_sizeof(png_info)); + + return (info_ptr); +} + +/* This function frees the memory associated with a single info struct. + * Normally, one would use either png_destroy_read_struct() or + * png_destroy_write_struct() to free an info struct, but this may be + * useful for some applications. + */ +void PNGAPI +png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) +{ + png_infop info_ptr = NULL; + + png_debug(1, "in png_destroy_info_struct"); + + if (png_ptr == NULL) + return; + + if (info_ptr_ptr != NULL) + info_ptr = *info_ptr_ptr; + + if (info_ptr != NULL) + { + png_info_destroy(png_ptr, info_ptr); + +#ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, + png_ptr->mem_ptr); +#else + png_destroy_struct((png_voidp)info_ptr); +#endif + *info_ptr_ptr = NULL; + } +} + +/* Initialize the info structure. This is now an internal function (0.89) + * and applications using it are urged to use png_create_info_struct() + * instead. + */ + +void PNGAPI +png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) +{ + png_infop info_ptr = *ptr_ptr; + + png_debug(1, "in png_info_init_3"); + + if (info_ptr == NULL) + return; + + if (png_sizeof(png_info) > png_info_struct_size) + { + png_destroy_struct(info_ptr); + info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); + *ptr_ptr = info_ptr; + } + + /* Set everything to 0 */ + png_memset(info_ptr, 0, png_sizeof(png_info)); +} + +void PNGAPI +png_data_freer(png_structp png_ptr, png_infop info_ptr, + int freer, png_uint_32 mask) +{ + png_debug(1, "in png_data_freer"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (freer == PNG_DESTROY_WILL_FREE_DATA) + info_ptr->free_me |= mask; + + else if (freer == PNG_USER_WILL_FREE_DATA) + info_ptr->free_me &= ~mask; + + else + png_warning(png_ptr, + "Unknown freer parameter in png_data_freer"); +} + +void PNGAPI +png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, + int num) +{ + png_debug(1, "in png_free_data"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + +#ifdef PNG_TEXT_SUPPORTED + /* Free text item num or (if num == -1) all text items */ + if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) + { + if (num != -1) + { + if (info_ptr->text && info_ptr->text[num].key) + { + png_free(png_ptr, info_ptr->text[num].key); + info_ptr->text[num].key = NULL; + } + } + + else + { + int i; + for (i = 0; i < info_ptr->num_text; i++) + png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); + png_free(png_ptr, info_ptr->text); + info_ptr->text = NULL; + info_ptr->num_text=0; + } + } +#endif + +#ifdef PNG_tRNS_SUPPORTED + /* Free any tRNS entry */ + if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) + { + png_free(png_ptr, info_ptr->trans_alpha); + info_ptr->trans_alpha = NULL; + info_ptr->valid &= ~PNG_INFO_tRNS; + } +#endif + +#ifdef PNG_sCAL_SUPPORTED + /* Free any sCAL entry */ + if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) + { + png_free(png_ptr, info_ptr->scal_s_width); + png_free(png_ptr, info_ptr->scal_s_height); + info_ptr->scal_s_width = NULL; + info_ptr->scal_s_height = NULL; + info_ptr->valid &= ~PNG_INFO_sCAL; + } +#endif + +#ifdef PNG_pCAL_SUPPORTED + /* Free any pCAL entry */ + if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) + { + png_free(png_ptr, info_ptr->pcal_purpose); + png_free(png_ptr, info_ptr->pcal_units); + info_ptr->pcal_purpose = NULL; + info_ptr->pcal_units = NULL; + if (info_ptr->pcal_params != NULL) + { + int i; + for (i = 0; i < (int)info_ptr->pcal_nparams; i++) + { + png_free(png_ptr, info_ptr->pcal_params[i]); + info_ptr->pcal_params[i] = NULL; + } + png_free(png_ptr, info_ptr->pcal_params); + info_ptr->pcal_params = NULL; + } + info_ptr->valid &= ~PNG_INFO_pCAL; + } +#endif + +#ifdef PNG_iCCP_SUPPORTED + /* Free any iCCP entry */ + if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) + { + png_free(png_ptr, info_ptr->iccp_name); + png_free(png_ptr, info_ptr->iccp_profile); + info_ptr->iccp_name = NULL; + info_ptr->iccp_profile = NULL; + info_ptr->valid &= ~PNG_INFO_iCCP; + } +#endif + +#ifdef PNG_sPLT_SUPPORTED + /* Free a given sPLT entry, or (if num == -1) all sPLT entries */ + if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) + { + if (num != -1) + { + if (info_ptr->splt_palettes) + { + png_free(png_ptr, info_ptr->splt_palettes[num].name); + png_free(png_ptr, info_ptr->splt_palettes[num].entries); + info_ptr->splt_palettes[num].name = NULL; + info_ptr->splt_palettes[num].entries = NULL; + } + } + + else + { + if (info_ptr->splt_palettes_num) + { + int i; + for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) + png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); + + png_free(png_ptr, info_ptr->splt_palettes); + info_ptr->splt_palettes = NULL; + info_ptr->splt_palettes_num = 0; + } + info_ptr->valid &= ~PNG_INFO_sPLT; + } + } +#endif + +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + if (png_ptr->unknown_chunk.data) + { + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; + } + + if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) + { + if (num != -1) + { + if (info_ptr->unknown_chunks) + { + png_free(png_ptr, info_ptr->unknown_chunks[num].data); + info_ptr->unknown_chunks[num].data = NULL; + } + } + + else + { + int i; + + if (info_ptr->unknown_chunks_num) + { + for (i = 0; i < info_ptr->unknown_chunks_num; i++) + png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); + + png_free(png_ptr, info_ptr->unknown_chunks); + info_ptr->unknown_chunks = NULL; + info_ptr->unknown_chunks_num = 0; + } + } + } +#endif + +#ifdef PNG_hIST_SUPPORTED + /* Free any hIST entry */ + if ((mask & PNG_FREE_HIST) & info_ptr->free_me) + { + png_free(png_ptr, info_ptr->hist); + info_ptr->hist = NULL; + info_ptr->valid &= ~PNG_INFO_hIST; + } +#endif + + /* Free any PLTE entry that was internally allocated */ + if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) + { + png_zfree(png_ptr, info_ptr->palette); + info_ptr->palette = NULL; + info_ptr->valid &= ~PNG_INFO_PLTE; + info_ptr->num_palette = 0; + } + +#ifdef PNG_INFO_IMAGE_SUPPORTED + /* Free any image bits attached to the info structure */ + if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) + { + if (info_ptr->row_pointers) + { + int row; + for (row = 0; row < (int)info_ptr->height; row++) + { + png_free(png_ptr, info_ptr->row_pointers[row]); + info_ptr->row_pointers[row] = NULL; + } + png_free(png_ptr, info_ptr->row_pointers); + info_ptr->row_pointers = NULL; + } + info_ptr->valid &= ~PNG_INFO_IDAT; + } +#endif + + if (num != -1) + mask &= ~PNG_FREE_MUL; + + info_ptr->free_me &= ~mask; +} + +/* This is an internal routine to free any memory that the info struct is + * pointing to before re-using it or freeing the struct itself. Recall + * that png_free() checks for NULL pointers for us. + */ +void /* PRIVATE */ +png_info_destroy(png_structp png_ptr, png_infop info_ptr) +{ + png_debug(1, "in png_info_destroy"); + + png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + if (png_ptr->num_chunk_list) + { + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list = NULL; + png_ptr->num_chunk_list = 0; + } +#endif + + png_info_init_3(&info_ptr, png_sizeof(png_info)); +} +#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ + +/* This function returns a pointer to the io_ptr associated with the user + * functions. The application should free any memory associated with this + * pointer before png_write_destroy() or png_read_destroy() are called. + */ +png_voidp PNGAPI +png_get_io_ptr(png_structp png_ptr) +{ + if (png_ptr == NULL) + return (NULL); + + return (png_ptr->io_ptr); +} + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) +# ifdef PNG_STDIO_SUPPORTED +/* Initialize the default input/output functions for the PNG file. If you + * use your own read or write routines, you can call either png_set_read_fn() + * or png_set_write_fn() instead of png_init_io(). If you have defined + * PNG_NO_STDIO or otherwise disabled PNG_STDIO_SUPPORTED, you must use a + * function of your own because "FILE *" isn't necessarily available. + */ +void PNGAPI +png_init_io(png_structp png_ptr, png_FILE_p fp) +{ + png_debug(1, "in png_init_io"); + + if (png_ptr == NULL) + return; + + png_ptr->io_ptr = (png_voidp)fp; +} +# endif + +# ifdef PNG_TIME_RFC1123_SUPPORTED +/* Convert the supplied time into an RFC 1123 string suitable for use in + * a "Creation Time" or other text-based time string. + */ +png_const_charp PNGAPI +png_convert_to_rfc1123(png_structp png_ptr, png_const_timep ptime) +{ + static PNG_CONST char short_months[12][4] = + {"Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; + + if (png_ptr == NULL) + return (NULL); + + if (ptime->year > 9999 /* RFC1123 limitation */ || + ptime->month == 0 || ptime->month > 12 || + ptime->day == 0 || ptime->day > 31 || + ptime->hour > 23 || ptime->minute > 59 || + ptime->second > 60) + { + png_warning(png_ptr, "Ignoring invalid time value"); + return (NULL); + } + + { + size_t pos = 0; + char number_buf[5]; /* enough for a four-digit year */ + +# define APPEND_STRING(string)\ + pos = png_safecat(png_ptr->time_buffer, sizeof png_ptr->time_buffer,\ + pos, (string)) +# define APPEND_NUMBER(format, value)\ + APPEND_STRING(PNG_FORMAT_NUMBER(number_buf, format, (value))) +# define APPEND(ch)\ + if (pos < (sizeof png_ptr->time_buffer)-1)\ + png_ptr->time_buffer[pos++] = (ch) + + APPEND_NUMBER(PNG_NUMBER_FORMAT_u, (unsigned)ptime->day); + APPEND(' '); + APPEND_STRING(short_months[(ptime->month - 1)]); + APPEND(' '); + APPEND_NUMBER(PNG_NUMBER_FORMAT_u, ptime->year); + APPEND(' '); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->hour); + APPEND(':'); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->minute); + APPEND(':'); + APPEND_NUMBER(PNG_NUMBER_FORMAT_02u, (unsigned)ptime->second); + APPEND_STRING(" +0000"); /* This reliably terminates the buffer */ + +# undef APPEND +# undef APPEND_NUMBER +# undef APPEND_STRING + } + + return png_ptr->time_buffer; +} +# endif /* PNG_TIME_RFC1123_SUPPORTED */ + +#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ + +png_const_charp PNGAPI +png_get_copyright(png_const_structp png_ptr) +{ + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ +#ifdef PNG_STRING_COPYRIGHT + return PNG_STRING_COPYRIGHT +#else +# ifdef __STDC__ + return PNG_STRING_NEWLINE \ + "libpng version 1.5.7 - December 15, 2011" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ + "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ + "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ + PNG_STRING_NEWLINE; +# else + return "libpng version 1.5.7 - December 15, 2011\ + Copyright (c) 1998-2011 Glenn Randers-Pehrson\ + Copyright (c) 1996-1997 Andreas Dilger\ + Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; +# endif +#endif +} + +/* The following return the library version as a short string in the + * format 1.0.0 through 99.99.99zz. To get the version of *.h files + * used with your application, print out PNG_LIBPNG_VER_STRING, which + * is defined in png.h. + * Note: now there is no difference between png_get_libpng_ver() and + * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, + * it is guaranteed that png.c uses the correct version of png.h. + */ +png_const_charp PNGAPI +png_get_libpng_ver(png_const_structp png_ptr) +{ + /* Version of *.c files used when building libpng */ + return png_get_header_ver(png_ptr); +} + +png_const_charp PNGAPI +png_get_header_ver(png_const_structp png_ptr) +{ + /* Version of *.h files used when building libpng */ + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ + return PNG_LIBPNG_VER_STRING; +} + +png_const_charp PNGAPI +png_get_header_version(png_const_structp png_ptr) +{ + /* Returns longer string containing both version and date */ + PNG_UNUSED(png_ptr) /* Silence compiler warning about unused png_ptr */ +#ifdef __STDC__ + return PNG_HEADER_VERSION_STRING +# ifndef PNG_READ_SUPPORTED + " (NO READ SUPPORT)" +# endif + PNG_STRING_NEWLINE; +#else + return PNG_HEADER_VERSION_STRING; +#endif +} + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +int PNGAPI +png_handle_as_unknown(png_structp png_ptr, png_const_bytep chunk_name) +{ + /* Check chunk_name and return "keep" value if it's on the list, else 0 */ + png_const_bytep p, p_end; + + if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list <= 0) + return PNG_HANDLE_CHUNK_AS_DEFAULT; + + p_end = png_ptr->chunk_list; + p = p_end + png_ptr->num_chunk_list*5; /* beyond end */ + + /* The code is the fifth byte after each four byte string. Historically this + * code was always searched from the end of the list, so it should continue + * to do so in case there are duplicated entries. + */ + do /* num_chunk_list > 0, so at least one */ + { + p -= 5; + if (!png_memcmp(chunk_name, p, 4)) + return p[4]; + } + while (p > p_end); + + return PNG_HANDLE_CHUNK_AS_DEFAULT; +} + +int /* PRIVATE */ +png_chunk_unknown_handling(png_structp png_ptr, png_uint_32 chunk_name) +{ + png_byte chunk_string[5]; + + PNG_CSTRING_FROM_CHUNK(chunk_string, chunk_name); + return png_handle_as_unknown(png_ptr, chunk_string); +} +#endif + +#ifdef PNG_READ_SUPPORTED +/* This function, added to libpng-1.0.6g, is untested. */ +int PNGAPI +png_reset_zstream(png_structp png_ptr) +{ + if (png_ptr == NULL) + return Z_STREAM_ERROR; + + return (inflateReset(&png_ptr->zstream)); +} +#endif /* PNG_READ_SUPPORTED */ + +/* This function was added to libpng-1.0.7 */ +png_uint_32 PNGAPI +png_access_version_number(void) +{ + /* Version of *.c files used when building libpng */ + return((png_uint_32)PNG_LIBPNG_VER); +} + + + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) +/* png_convert_size: a PNGAPI but no longer in png.h, so deleted + * at libpng 1.5.5! + */ + +/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ +# ifdef PNG_CHECK_cHRM_SUPPORTED + +int /* PRIVATE */ +png_check_cHRM_fixed(png_structp png_ptr, + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, + png_fixed_point blue_x, png_fixed_point blue_y) +{ + int ret = 1; + unsigned long xy_hi,xy_lo,yx_hi,yx_lo; + + png_debug(1, "in function png_check_cHRM_fixed"); + + if (png_ptr == NULL) + return 0; + + /* (x,y,z) values are first limited to 0..100000 (PNG_FP_1), the white + * y must also be greater than 0. To test for the upper limit calculate + * (PNG_FP_1-y) - x must be <= to this for z to be >= 0 (and the expression + * cannot overflow.) At this point we know x and y are >= 0 and (x+y) is + * <= PNG_FP_1. The previous test on PNG_MAX_UINT_31 is removed because it + * pointless (and it produces compiler warnings!) + */ + if (white_x < 0 || white_y <= 0 || + red_x < 0 || red_y < 0 || + green_x < 0 || green_y < 0 || + blue_x < 0 || blue_y < 0) + { + png_warning(png_ptr, + "Ignoring attempt to set negative chromaticity value"); + ret = 0; + } + /* And (x+y) must be <= PNG_FP_1 (so z is >= 0) */ + if (white_x > PNG_FP_1 - white_y) + { + png_warning(png_ptr, "Invalid cHRM white point"); + ret = 0; + } + + if (red_x > PNG_FP_1 - red_y) + { + png_warning(png_ptr, "Invalid cHRM red point"); + ret = 0; + } + + if (green_x > PNG_FP_1 - green_y) + { + png_warning(png_ptr, "Invalid cHRM green point"); + ret = 0; + } + + if (blue_x > PNG_FP_1 - blue_y) + { + png_warning(png_ptr, "Invalid cHRM blue point"); + ret = 0; + } + + png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); + png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); + + if (xy_hi == yx_hi && xy_lo == yx_lo) + { + png_warning(png_ptr, + "Ignoring attempt to set cHRM RGB triangle with zero area"); + ret = 0; + } + + return ret; +} +# endif /* PNG_CHECK_cHRM_SUPPORTED */ + +#ifdef PNG_cHRM_SUPPORTED +/* Added at libpng-1.5.5 to support read and write of true CIEXYZ values for + * cHRM, as opposed to using chromaticities. These internal APIs return + * non-zero on a parameter error. The X, Y and Z values are required to be + * positive and less than 1.0. + */ +int png_xy_from_XYZ(png_xy *xy, png_XYZ XYZ) +{ + png_int_32 d, dwhite, whiteX, whiteY; + + d = XYZ.redX + XYZ.redY + XYZ.redZ; + if (!png_muldiv(&xy->redx, XYZ.redX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->redy, XYZ.redY, PNG_FP_1, d)) return 1; + dwhite = d; + whiteX = XYZ.redX; + whiteY = XYZ.redY; + + d = XYZ.greenX + XYZ.greenY + XYZ.greenZ; + if (!png_muldiv(&xy->greenx, XYZ.greenX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->greeny, XYZ.greenY, PNG_FP_1, d)) return 1; + dwhite += d; + whiteX += XYZ.greenX; + whiteY += XYZ.greenY; + + d = XYZ.blueX + XYZ.blueY + XYZ.blueZ; + if (!png_muldiv(&xy->bluex, XYZ.blueX, PNG_FP_1, d)) return 1; + if (!png_muldiv(&xy->bluey, XYZ.blueY, PNG_FP_1, d)) return 1; + dwhite += d; + whiteX += XYZ.blueX; + whiteY += XYZ.blueY; + + /* The reference white is simply the same of the end-point (X,Y,Z) vectors, + * thus: + */ + if (!png_muldiv(&xy->whitex, whiteX, PNG_FP_1, dwhite)) return 1; + if (!png_muldiv(&xy->whitey, whiteY, PNG_FP_1, dwhite)) return 1; + + return 0; +} + +int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy) +{ + png_fixed_point red_inverse, green_inverse, blue_scale; + png_fixed_point left, right, denominator; + + /* Check xy and, implicitly, z. Note that wide gamut color spaces typically + * have end points with 0 tristimulus values (these are impossible end + * points, but they are used to cover the possible colors.) + */ + if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1; + if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1; + if (xy.greenx < 0 || xy.greenx > PNG_FP_1) return 1; + if (xy.greeny < 0 || xy.greeny > PNG_FP_1-xy.greenx) return 1; + if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1; + if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1; + if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1; + if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1; + + /* The reverse calculation is more difficult because the original tristimulus + * value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8 + * derived values were recorded in the cHRM chunk; + * (red,green,blue,white)x(x,y). This loses one degree of freedom and + * therefore an arbitrary ninth value has to be introduced to undo the + * original transformations. + * + * Think of the original end-points as points in (X,Y,Z) space. The + * chromaticity values (c) have the property: + * + * C + * c = --------- + * X + Y + Z + * + * For each c (x,y,z) from the corresponding original C (X,Y,Z). Thus the + * three chromaticity values (x,y,z) for each end-point obey the + * relationship: + * + * x + y + z = 1 + * + * This describes the plane in (X,Y,Z) space that intersects each axis at the + * value 1.0; call this the chromaticity plane. Thus the chromaticity + * calculation has scaled each end-point so that it is on the x+y+z=1 plane + * and chromaticity is the intersection of the vector from the origin to the + * (X,Y,Z) value with the chromaticity plane. + * + * To fully invert the chromaticity calculation we would need the three + * end-point scale factors, (red-scale, green-scale, blue-scale), but these + * were not recorded. Instead we calculated the reference white (X,Y,Z) and + * recorded the chromaticity of this. The reference white (X,Y,Z) would have + * given all three of the scale factors since: + * + * color-C = color-c * color-scale + * white-C = red-C + green-C + blue-C + * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale + * + * But cHRM records only white-x and white-y, so we have lost the white scale + * factor: + * + * white-C = white-c*white-scale + * + * To handle this the inverse transformation makes an arbitrary assumption + * about white-scale: + * + * Assume: white-Y = 1.0 + * Hence: white-scale = 1/white-y + * Or: red-Y + green-Y + blue-Y = 1.0 + * + * Notice the last statement of the assumption gives an equation in three of + * the nine values we want to calculate. 8 more equations come from the + * above routine as summarised at the top above (the chromaticity + * calculation): + * + * Given: color-x = color-X / (color-X + color-Y + color-Z) + * Hence: (color-x - 1)*color-X + color.x*color-Y + color.x*color-Z = 0 + * + * This is 9 simultaneous equations in the 9 variables "color-C" and can be + * solved by Cramer's rule. Cramer's rule requires calculating 10 9x9 matrix + * determinants, however this is not as bad as it seems because only 28 of + * the total of 90 terms in the various matrices are non-zero. Nevertheless + * Cramer's rule is notoriously numerically unstable because the determinant + * calculation involves the difference of large, but similar, numbers. It is + * difficult to be sure that the calculation is stable for real world values + * and it is certain that it becomes unstable where the end points are close + * together. + * + * So this code uses the perhaps slighly less optimal but more understandable + * and totally obvious approach of calculating color-scale. + * + * This algorithm depends on the precision in white-scale and that is + * (1/white-y), so we can immediately see that as white-y approaches 0 the + * accuracy inherent in the cHRM chunk drops off substantially. + * + * libpng arithmetic: a simple invertion of the above equations + * ------------------------------------------------------------ + * + * white_scale = 1/white-y + * white-X = white-x * white-scale + * white-Y = 1.0 + * white-Z = (1 - white-x - white-y) * white_scale + * + * white-C = red-C + green-C + blue-C + * = red-c*red-scale + green-c*green-scale + blue-c*blue-scale + * + * This gives us three equations in (red-scale,green-scale,blue-scale) where + * all the coefficients are now known: + * + * red-x*red-scale + green-x*green-scale + blue-x*blue-scale + * = white-x/white-y + * red-y*red-scale + green-y*green-scale + blue-y*blue-scale = 1 + * red-z*red-scale + green-z*green-scale + blue-z*blue-scale + * = (1 - white-x - white-y)/white-y + * + * In the last equation color-z is (1 - color-x - color-y) so we can add all + * three equations together to get an alternative third: + * + * red-scale + green-scale + blue-scale = 1/white-y = white-scale + * + * So now we have a Cramer's rule solution where the determinants are just + * 3x3 - far more tractible. Unfortunately 3x3 determinants still involve + * multiplication of three coefficients so we can't guarantee to avoid + * overflow in the libpng fixed point representation. Using Cramer's rule in + * floating point is probably a good choice here, but it's not an option for + * fixed point. Instead proceed to simplify the first two equations by + * eliminating what is likely to be the largest value, blue-scale: + * + * blue-scale = white-scale - red-scale - green-scale + * + * Hence: + * + * (red-x - blue-x)*red-scale + (green-x - blue-x)*green-scale = + * (white-x - blue-x)*white-scale + * + * (red-y - blue-y)*red-scale + (green-y - blue-y)*green-scale = + * 1 - blue-y*white-scale + * + * And now we can trivially solve for (red-scale,green-scale): + * + * green-scale = + * (white-x - blue-x)*white-scale - (red-x - blue-x)*red-scale + * ----------------------------------------------------------- + * green-x - blue-x + * + * red-scale = + * 1 - blue-y*white-scale - (green-y - blue-y) * green-scale + * --------------------------------------------------------- + * red-y - blue-y + * + * Hence: + * + * red-scale = + * ( (green-x - blue-x) * (white-y - blue-y) - + * (green-y - blue-y) * (white-x - blue-x) ) / white-y + * ------------------------------------------------------------------------- + * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) + * + * green-scale = + * ( (red-y - blue-y) * (white-x - blue-x) - + * (red-x - blue-x) * (white-y - blue-y) ) / white-y + * ------------------------------------------------------------------------- + * (green-x - blue-x)*(red-y - blue-y)-(green-y - blue-y)*(red-x - blue-x) + * + * Accuracy: + * The input values have 5 decimal digits of accuracy. The values are all in + * the range 0 < value < 1, so simple products are in the same range but may + * need up to 10 decimal digits to preserve the original precision and avoid + * underflow. Because we are using a 32-bit signed representation we cannot + * match this; the best is a little over 9 decimal digits, less than 10. + * + * The approach used here is to preserve the maximum precision within the + * signed representation. Because the red-scale calculation above uses the + * difference between two products of values that must be in the range -1..+1 + * it is sufficient to divide the product by 7; ceil(100,000/32767*2). The + * factor is irrelevant in the calculation because it is applied to both + * numerator and denominator. + * + * Note that the values of the differences of the products of the + * chromaticities in the above equations tend to be small, for example for + * the sRGB chromaticities they are: + * + * red numerator: -0.04751 + * green numerator: -0.08788 + * denominator: -0.2241 (without white-y multiplication) + * + * The resultant Y coefficients from the chromaticities of some widely used + * color space definitions are (to 15 decimal places): + * + * sRGB + * 0.212639005871510 0.715168678767756 0.072192315360734 + * Kodak ProPhoto + * 0.288071128229293 0.711843217810102 0.000085653960605 + * Adobe RGB + * 0.297344975250536 0.627363566255466 0.075291458493998 + * Adobe Wide Gamut RGB + * 0.258728243040113 0.724682314948566 0.016589442011321 + */ + /* By the argument, above overflow should be impossible here. The return + * value of 2 indicates an internal error to the caller. + */ + if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.redy - xy.bluey, 7)) return 2; + if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.redx - xy.bluex, 7)) return 2; + denominator = left - right; + + /* Now find the red numerator. */ + if (!png_muldiv(&left, xy.greenx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; + if (!png_muldiv(&right, xy.greeny-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + + /* Overflow is possible here and it indicates an extreme set of PNG cHRM + * chunk values. This calculation actually returns the reciprocal of the + * scale value because this allows us to delay the multiplication of white-y + * into the denominator, which tends to produce a small number. + */ + if (!png_muldiv(&red_inverse, xy.whitey, denominator, left-right) || + red_inverse <= xy.whitey /* r+g+b scales = white scale */) + return 1; + + /* Similarly for green_inverse: */ + if (!png_muldiv(&left, xy.redy-xy.bluey, xy.whitex-xy.bluex, 7)) return 2; + if (!png_muldiv(&right, xy.redx-xy.bluex, xy.whitey-xy.bluey, 7)) return 2; + if (!png_muldiv(&green_inverse, xy.whitey, denominator, left-right) || + green_inverse <= xy.whitey) + return 1; + + /* And the blue scale, the checks above guarantee this can't overflow but it + * can still produce 0 for extreme cHRM values. + */ + blue_scale = png_reciprocal(xy.whitey) - png_reciprocal(red_inverse) - + png_reciprocal(green_inverse); + if (blue_scale <= 0) return 1; + + + /* And fill in the png_XYZ: */ + if (!png_muldiv(&XYZ->redX, xy.redx, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redY, xy.redy, PNG_FP_1, red_inverse)) return 1; + if (!png_muldiv(&XYZ->redZ, PNG_FP_1 - xy.redx - xy.redy, PNG_FP_1, + red_inverse)) + return 1; + + if (!png_muldiv(&XYZ->greenX, xy.greenx, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenY, xy.greeny, PNG_FP_1, green_inverse)) return 1; + if (!png_muldiv(&XYZ->greenZ, PNG_FP_1 - xy.greenx - xy.greeny, PNG_FP_1, + green_inverse)) + return 1; + + if (!png_muldiv(&XYZ->blueX, xy.bluex, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueY, xy.bluey, blue_scale, PNG_FP_1)) return 1; + if (!png_muldiv(&XYZ->blueZ, PNG_FP_1 - xy.bluex - xy.bluey, blue_scale, + PNG_FP_1)) + return 1; + + return 0; /*success*/ +} + +int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy) +{ + switch (png_XYZ_from_xy(XYZ, xy)) + { + case 0: /* success */ + return 1; + + case 1: + /* The chunk may be technically valid, but we got png_fixed_point + * overflow while trying to get XYZ values out of it. This is + * entirely benign - the cHRM chunk is pretty extreme. + */ + png_warning(png_ptr, + "extreme cHRM chunk cannot be converted to tristimulus values"); + break; + + default: + /* libpng is broken; this should be a warning but if it happens we + * want error reports so for the moment it is an error. + */ + png_error(png_ptr, "internal error in png_XYZ_from_xy"); + break; + } + + /* ERROR RETURN */ + return 0; +} +#endif + +void /* PRIVATE */ +png_check_IHDR(png_structp png_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type) +{ + int error = 0; + + /* Check for width and height valid values */ + if (width == 0) + { + png_warning(png_ptr, "Image width is zero in IHDR"); + error = 1; + } + + if (height == 0) + { + png_warning(png_ptr, "Image height is zero in IHDR"); + error = 1; + } + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (width > png_ptr->user_width_max) + +# else + if (width > PNG_USER_WIDTH_MAX) +# endif + { + png_warning(png_ptr, "Image width exceeds user limit in IHDR"); + error = 1; + } + +# ifdef PNG_SET_USER_LIMITS_SUPPORTED + if (height > png_ptr->user_height_max) +# else + if (height > PNG_USER_HEIGHT_MAX) +# endif + { + png_warning(png_ptr, "Image height exceeds user limit in IHDR"); + error = 1; + } + + if (width > PNG_UINT_31_MAX) + { + png_warning(png_ptr, "Invalid image width in IHDR"); + error = 1; + } + + if (height > PNG_UINT_31_MAX) + { + png_warning(png_ptr, "Invalid image height in IHDR"); + error = 1; + } + + if (width > (PNG_UINT_32_MAX + >> 3) /* 8-byte RGBA pixels */ + - 48 /* bigrowbuf hack */ + - 1 /* filter byte */ + - 7*8 /* rounding of width to multiple of 8 pixels */ + - 8) /* extra max_pixel_depth pad */ + png_warning(png_ptr, "Width is too large for libpng to process pixels"); + + /* Check other values */ + if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && + bit_depth != 8 && bit_depth != 16) + { + png_warning(png_ptr, "Invalid bit depth in IHDR"); + error = 1; + } + + if (color_type < 0 || color_type == 1 || + color_type == 5 || color_type > 6) + { + png_warning(png_ptr, "Invalid color type in IHDR"); + error = 1; + } + + if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || + ((color_type == PNG_COLOR_TYPE_RGB || + color_type == PNG_COLOR_TYPE_GRAY_ALPHA || + color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) + { + png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR"); + error = 1; + } + + if (interlace_type >= PNG_INTERLACE_LAST) + { + png_warning(png_ptr, "Unknown interlace method in IHDR"); + error = 1; + } + + if (compression_type != PNG_COMPRESSION_TYPE_BASE) + { + png_warning(png_ptr, "Unknown compression method in IHDR"); + error = 1; + } + +# ifdef PNG_MNG_FEATURES_SUPPORTED + /* Accept filter_method 64 (intrapixel differencing) only if + * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and + * 2. Libpng did not read a PNG signature (this filter_method is only + * used in PNG datastreams that are embedded in MNG datastreams) and + * 3. The application called png_permit_mng_features with a mask that + * included PNG_FLAG_MNG_FILTER_64 and + * 4. The filter_method is 64 and + * 5. The color_type is RGB or RGBA + */ + if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) && + png_ptr->mng_features_permitted) + png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); + + if (filter_type != PNG_FILTER_TYPE_BASE) + { + if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && + ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && + (color_type == PNG_COLOR_TYPE_RGB || + color_type == PNG_COLOR_TYPE_RGB_ALPHA))) + { + png_warning(png_ptr, "Unknown filter method in IHDR"); + error = 1; + } + + if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) + { + png_warning(png_ptr, "Invalid filter method in IHDR"); + error = 1; + } + } + +# else + if (filter_type != PNG_FILTER_TYPE_BASE) + { + png_warning(png_ptr, "Unknown filter method in IHDR"); + error = 1; + } +# endif + + if (error == 1) + png_error(png_ptr, "Invalid IHDR data"); +} + +#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) +/* ASCII to fp functions */ +/* Check an ASCII formated floating point value, see the more detailed + * comments in pngpriv.h + */ +/* The following is used internally to preserve the sticky flags */ +#define png_fp_add(state, flags) ((state) |= (flags)) +#define png_fp_set(state, value) ((state) = (value) | ((state) & PNG_FP_STICKY)) + +int /* PRIVATE */ +png_check_fp_number(png_const_charp string, png_size_t size, int *statep, + png_size_tp whereami) +{ + int state = *statep; + png_size_t i = *whereami; + + while (i < size) + { + int type; + /* First find the type of the next character */ + switch (string[i]) + { + case 43: type = PNG_FP_SAW_SIGN; break; + case 45: type = PNG_FP_SAW_SIGN + PNG_FP_NEGATIVE; break; + case 46: type = PNG_FP_SAW_DOT; break; + case 48: type = PNG_FP_SAW_DIGIT; break; + case 49: case 50: case 51: case 52: + case 53: case 54: case 55: case 56: + case 57: type = PNG_FP_SAW_DIGIT + PNG_FP_NONZERO; break; + case 69: + case 101: type = PNG_FP_SAW_E; break; + default: goto PNG_FP_End; + } + + /* Now deal with this type according to the current + * state, the type is arranged to not overlap the + * bits of the PNG_FP_STATE. + */ + switch ((state & PNG_FP_STATE) + (type & PNG_FP_SAW_ANY)) + { + case PNG_FP_INTEGER + PNG_FP_SAW_SIGN: + if (state & PNG_FP_SAW_ANY) + goto PNG_FP_End; /* not a part of the number */ + + png_fp_add(state, type); + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_DOT: + /* Ok as trailer, ok as lead of fraction. */ + if (state & PNG_FP_SAW_DOT) /* two dots */ + goto PNG_FP_End; + + else if (state & PNG_FP_SAW_DIGIT) /* trailing dot? */ + png_fp_add(state, type); + + else + png_fp_set(state, PNG_FP_FRACTION | type); + + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_DIGIT: + if (state & PNG_FP_SAW_DOT) /* delayed fraction */ + png_fp_set(state, PNG_FP_FRACTION | PNG_FP_SAW_DOT); + + png_fp_add(state, type | PNG_FP_WAS_VALID); + + break; + + case PNG_FP_INTEGER + PNG_FP_SAW_E: + if ((state & PNG_FP_SAW_DIGIT) == 0) + goto PNG_FP_End; + + png_fp_set(state, PNG_FP_EXPONENT); + + break; + + /* case PNG_FP_FRACTION + PNG_FP_SAW_SIGN: + goto PNG_FP_End; ** no sign in fraction */ + + /* case PNG_FP_FRACTION + PNG_FP_SAW_DOT: + goto PNG_FP_End; ** Because SAW_DOT is always set */ + + case PNG_FP_FRACTION + PNG_FP_SAW_DIGIT: + png_fp_add(state, type | PNG_FP_WAS_VALID); + break; + + case PNG_FP_FRACTION + PNG_FP_SAW_E: + /* This is correct because the trailing '.' on an + * integer is handled above - so we can only get here + * with the sequence ".E" (with no preceding digits). + */ + if ((state & PNG_FP_SAW_DIGIT) == 0) + goto PNG_FP_End; + + png_fp_set(state, PNG_FP_EXPONENT); + + break; + + case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN: + if (state & PNG_FP_SAW_ANY) + goto PNG_FP_End; /* not a part of the number */ + + png_fp_add(state, PNG_FP_SAW_SIGN); + + break; + + /* case PNG_FP_EXPONENT + PNG_FP_SAW_DOT: + goto PNG_FP_End; */ + + case PNG_FP_EXPONENT + PNG_FP_SAW_DIGIT: + png_fp_add(state, PNG_FP_SAW_DIGIT | PNG_FP_WAS_VALID); + + break; + + /* case PNG_FP_EXPONEXT + PNG_FP_SAW_E: + goto PNG_FP_End; */ + + default: goto PNG_FP_End; /* I.e. break 2 */ + } + + /* The character seems ok, continue. */ + ++i; + } + +PNG_FP_End: + /* Here at the end, update the state and return the correct + * return code. + */ + *statep = state; + *whereami = i; + + return (state & PNG_FP_SAW_DIGIT) != 0; +} + + +/* The same but for a complete string. */ +int +png_check_fp_string(png_const_charp string, png_size_t size) +{ + int state=0; + png_size_t char_index=0; + + if (png_check_fp_number(string, size, &state, &char_index) && + (char_index == size || string[char_index] == 0)) + return state /* must be non-zero - see above */; + + return 0; /* i.e. fail */ +} +#endif /* pCAL or sCAL */ + +#ifdef PNG_READ_sCAL_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED +/* Utility used below - a simple accurate power of ten from an integral + * exponent. + */ +static double +png_pow10(int power) +{ + int recip = 0; + double d = 1; + + /* Handle negative exponent with a reciprocal at the end because + * 10 is exact whereas .1 is inexact in base 2 + */ + if (power < 0) + { + if (power < DBL_MIN_10_EXP) return 0; + recip = 1, power = -power; + } + + if (power > 0) + { + /* Decompose power bitwise. */ + double mult = 10; + do + { + if (power & 1) d *= mult; + mult *= mult; + power >>= 1; + } + while (power > 0); + + if (recip) d = 1/d; + } + /* else power is 0 and d is 1 */ + + return d; +} + +/* Function to format a floating point value in ASCII with a given + * precision. + */ +void /* PRIVATE */ +png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size, + double fp, unsigned int precision) +{ + /* We use standard functions from math.h, but not printf because + * that would require stdio. The caller must supply a buffer of + * sufficient size or we will png_error. The tests on size and + * the space in ascii[] consumed are indicated below. + */ + if (precision < 1) + precision = DBL_DIG; + + /* Enforce the limit of the implementation precision too. */ + if (precision > DBL_DIG+1) + precision = DBL_DIG+1; + + /* Basic sanity checks */ + if (size >= precision+5) /* See the requirements below. */ + { + if (fp < 0) + { + fp = -fp; + *ascii++ = 45; /* '-' PLUS 1 TOTAL 1 */ + --size; + } + + if (fp >= DBL_MIN && fp <= DBL_MAX) + { + int exp_b10; /* A base 10 exponent */ + double base; /* 10^exp_b10 */ + + /* First extract a base 10 exponent of the number, + * the calculation below rounds down when converting + * from base 2 to base 10 (multiply by log10(2) - + * 0.3010, but 77/256 is 0.3008, so exp_b10 needs to + * be increased. Note that the arithmetic shift + * performs a floor() unlike C arithmetic - using a + * C multiply would break the following for negative + * exponents. + */ + (void)frexp(fp, &exp_b10); /* exponent to base 2 */ + + exp_b10 = (exp_b10 * 77) >> 8; /* <= exponent to base 10 */ + + /* Avoid underflow here. */ + base = png_pow10(exp_b10); /* May underflow */ + + while (base < DBL_MIN || base < fp) + { + /* And this may overflow. */ + double test = png_pow10(exp_b10+1); + + if (test <= DBL_MAX) + ++exp_b10, base = test; + + else + break; + } + + /* Normalize fp and correct exp_b10, after this fp is in the + * range [.1,1) and exp_b10 is both the exponent and the digit + * *before* which the decimal point should be inserted + * (starting with 0 for the first digit). Note that this + * works even if 10^exp_b10 is out of range because of the + * test on DBL_MAX above. + */ + fp /= base; + while (fp >= 1) fp /= 10, ++exp_b10; + + /* Because of the code above fp may, at this point, be + * less than .1, this is ok because the code below can + * handle the leading zeros this generates, so no attempt + * is made to correct that here. + */ + + { + int czero, clead, cdigits; + char exponent[10]; + + /* Allow up to two leading zeros - this will not lengthen + * the number compared to using E-n. + */ + if (exp_b10 < 0 && exp_b10 > -3) /* PLUS 3 TOTAL 4 */ + { + czero = -exp_b10; /* PLUS 2 digits: TOTAL 3 */ + exp_b10 = 0; /* Dot added below before first output. */ + } + else + czero = 0; /* No zeros to add */ + + /* Generate the digit list, stripping trailing zeros and + * inserting a '.' before a digit if the exponent is 0. + */ + clead = czero; /* Count of leading zeros */ + cdigits = 0; /* Count of digits in list. */ + + do + { + double d; + + fp *= 10; + /* Use modf here, not floor and subtract, so that + * the separation is done in one step. At the end + * of the loop don't break the number into parts so + * that the final digit is rounded. + */ + if (cdigits+czero-clead+1 < (int)precision) + fp = modf(fp, &d); + + else + { + d = floor(fp + .5); + + if (d > 9) + { + /* Rounding up to 10, handle that here. */ + if (czero > 0) + { + --czero, d = 1; + if (cdigits == 0) --clead; + } + else + { + while (cdigits > 0 && d > 9) + { + int ch = *--ascii; + + if (exp_b10 != (-1)) + ++exp_b10; + + else if (ch == 46) + { + ch = *--ascii, ++size; + /* Advance exp_b10 to '1', so that the + * decimal point happens after the + * previous digit. + */ + exp_b10 = 1; + } + + --cdigits; + d = ch - 47; /* I.e. 1+(ch-48) */ + } + + /* Did we reach the beginning? If so adjust the + * exponent but take into account the leading + * decimal point. + */ + if (d > 9) /* cdigits == 0 */ + { + if (exp_b10 == (-1)) + { + /* Leading decimal point (plus zeros?), if + * we lose the decimal point here it must + * be reentered below. + */ + int ch = *--ascii; + + if (ch == 46) + ++size, exp_b10 = 1; + + /* Else lost a leading zero, so 'exp_b10' is + * still ok at (-1) + */ + } + else + ++exp_b10; + + /* In all cases we output a '1' */ + d = 1; + } + } + } + fp = 0; /* Guarantees termination below. */ + } + + if (d == 0) + { + ++czero; + if (cdigits == 0) ++clead; + } + else + { + /* Included embedded zeros in the digit count. */ + cdigits += czero - clead; + clead = 0; + + while (czero > 0) + { + /* exp_b10 == (-1) means we just output the decimal + * place - after the DP don't adjust 'exp_b10' any + * more! + */ + if (exp_b10 != (-1)) + { + if (exp_b10 == 0) *ascii++ = 46, --size; + /* PLUS 1: TOTAL 4 */ + --exp_b10; + } + *ascii++ = 48, --czero; + } + + if (exp_b10 != (-1)) + { + if (exp_b10 == 0) *ascii++ = 46, --size; /* counted + above */ + --exp_b10; + } + *ascii++ = (char)(48 + (int)d), ++cdigits; + } + } + while (cdigits+czero-clead < (int)precision && fp > DBL_MIN); + + /* The total output count (max) is now 4+precision */ + + /* Check for an exponent, if we don't need one we are + * done and just need to terminate the string. At + * this point exp_b10==(-1) is effectively if flag - it got + * to '-1' because of the decrement after outputing + * the decimal point above (the exponent required is + * *not* -1!) + */ + if (exp_b10 >= (-1) && exp_b10 <= 2) + { + /* The following only happens if we didn't output the + * leading zeros above for negative exponent, so this + * doest add to the digit requirement. Note that the + * two zeros here can only be output if the two leading + * zeros were *not* output, so this doesn't increase + * the output count. + */ + while (--exp_b10 >= 0) *ascii++ = 48; + + *ascii = 0; + + /* Total buffer requirement (including the '\0') is + * 5+precision - see check at the start. + */ + return; + } + + /* Here if an exponent is required, adjust size for + * the digits we output but did not count. The total + * digit output here so far is at most 1+precision - no + * decimal point and no leading or trailing zeros have + * been output. + */ + size -= cdigits; + + *ascii++ = 69, --size; /* 'E': PLUS 1 TOTAL 2+precision */ + + /* The following use of an unsigned temporary avoids ambiguities in + * the signed arithmetic on exp_b10 and permits GCC at least to do + * better optimization. + */ + { + unsigned int uexp_b10; + + if (exp_b10 < 0) + { + *ascii++ = 45, --size; /* '-': PLUS 1 TOTAL 3+precision */ + uexp_b10 = -exp_b10; + } + + else + uexp_b10 = exp_b10; + + cdigits = 0; + + while (uexp_b10 > 0) + { + exponent[cdigits++] = (char)(48 + uexp_b10 % 10); + uexp_b10 /= 10; + } + } + + /* Need another size check here for the exponent digits, so + * this need not be considered above. + */ + if ((int)size > cdigits) + { + while (cdigits > 0) *ascii++ = exponent[--cdigits]; + + *ascii = 0; + + return; + } + } + } + else if (!(fp >= DBL_MIN)) + { + *ascii++ = 48; /* '0' */ + *ascii = 0; + return; + } + else + { + *ascii++ = 105; /* 'i' */ + *ascii++ = 110; /* 'n' */ + *ascii++ = 102; /* 'f' */ + *ascii = 0; + return; + } + } + + /* Here on buffer too small. */ + png_error(png_ptr, "ASCII conversion buffer too small"); +} + +# endif /* FLOATING_POINT */ + +# ifdef PNG_FIXED_POINT_SUPPORTED +/* Function to format a fixed point value in ASCII. + */ +void /* PRIVATE */ +png_ascii_from_fixed(png_structp png_ptr, png_charp ascii, png_size_t size, + png_fixed_point fp) +{ + /* Require space for 10 decimal digits, a decimal point, a minus sign and a + * trailing \0, 13 characters: + */ + if (size > 12) + { + png_uint_32 num; + + /* Avoid overflow here on the minimum integer. */ + if (fp < 0) + *ascii++ = 45, --size, num = -fp; + else + num = fp; + + if (num <= 0x80000000) /* else overflowed */ + { + unsigned int ndigits = 0, first = 16 /* flag value */; + char digits[10]; + + while (num) + { + /* Split the low digit off num: */ + unsigned int tmp = num/10; + num -= tmp*10; + digits[ndigits++] = (char)(48 + num); + /* Record the first non-zero digit, note that this is a number + * starting at 1, it's not actually the array index. + */ + if (first == 16 && num > 0) + first = ndigits; + num = tmp; + } + + if (ndigits > 0) + { + while (ndigits > 5) *ascii++ = digits[--ndigits]; + /* The remaining digits are fractional digits, ndigits is '5' or + * smaller at this point. It is certainly not zero. Check for a + * non-zero fractional digit: + */ + if (first <= 5) + { + unsigned int i; + *ascii++ = 46; /* decimal point */ + /* ndigits may be <5 for small numbers, output leading zeros + * then ndigits digits to first: + */ + i = 5; + while (ndigits < i) *ascii++ = 48, --i; + while (ndigits >= first) *ascii++ = digits[--ndigits]; + /* Don't output the trailing zeros! */ + } + } + else + *ascii++ = 48; + + /* And null terminate the string: */ + *ascii = 0; + return; + } + } + + /* Here on buffer too small. */ + png_error(png_ptr, "ASCII conversion buffer too small"); +} +# endif /* FIXED_POINT */ +#endif /* READ_SCAL */ + +#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ + !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) +png_fixed_point +png_fixed(png_structp png_ptr, double fp, png_const_charp text) +{ + double r = floor(100000 * fp + .5); + + if (r > 2147483647. || r < -2147483648.) + png_fixed_error(png_ptr, text); + + return (png_fixed_point)r; +} +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || \ + defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED) +/* muldiv functions */ +/* This API takes signed arguments and rounds the result to the nearest + * integer (or, for a fixed point number - the standard argument - to + * the nearest .00001). Overflow and divide by zero are signalled in + * the result, a boolean - true on success, false on overflow. + */ +int +png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times, + png_int_32 divisor) +{ + /* Return a * times / divisor, rounded. */ + if (divisor != 0) + { + if (a == 0 || times == 0) + { + *res = 0; + return 1; + } + else + { +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = a; + r *= times; + r /= divisor; + r = floor(r+.5); + + /* A png_fixed_point is a 32-bit integer. */ + if (r <= 2147483647. && r >= -2147483648.) + { + *res = (png_fixed_point)r; + return 1; + } +#else + int negative = 0; + png_uint_32 A, T, D; + png_uint_32 s16, s32, s00; + + if (a < 0) + negative = 1, A = -a; + else + A = a; + + if (times < 0) + negative = !negative, T = -times; + else + T = times; + + if (divisor < 0) + negative = !negative, D = -divisor; + else + D = divisor; + + /* Following can't overflow because the arguments only + * have 31 bits each, however the result may be 32 bits. + */ + s16 = (A >> 16) * (T & 0xffff) + + (A & 0xffff) * (T >> 16); + /* Can't overflow because the a*times bit is only 30 + * bits at most. + */ + s32 = (A >> 16) * (T >> 16) + (s16 >> 16); + s00 = (A & 0xffff) * (T & 0xffff); + + s16 = (s16 & 0xffff) << 16; + s00 += s16; + + if (s00 < s16) + ++s32; /* carry */ + + if (s32 < D) /* else overflow */ + { + /* s32.s00 is now the 64-bit product, do a standard + * division, we know that s32 < D, so the maximum + * required shift is 31. + */ + int bitshift = 32; + png_fixed_point result = 0; /* NOTE: signed */ + + while (--bitshift >= 0) + { + png_uint_32 d32, d00; + + if (bitshift > 0) + d32 = D >> (32-bitshift), d00 = D << bitshift; + + else + d32 = 0, d00 = D; + + if (s32 > d32) + { + if (s00 < d00) --s32; /* carry */ + s32 -= d32, s00 -= d00, result += 1<= d00) + s32 = 0, s00 -= d00, result += 1<= (D >> 1)) + ++result; + + if (negative) + result = -result; + + /* Check for overflow. */ + if ((negative && result <= 0) || (!negative && result >= 0)) + { + *res = result; + return 1; + } + } +#endif + } + } + + return 0; +} +#endif /* READ_GAMMA || INCH_CONVERSIONS */ + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) +/* The following is for when the caller doesn't much care about the + * result. + */ +png_fixed_point +png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times, + png_int_32 divisor) +{ + png_fixed_point result; + + if (png_muldiv(&result, a, times, divisor)) + return result; + + png_warning(png_ptr, "fixed point overflow ignored"); + return 0; +} +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */ +/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */ +png_fixed_point +png_reciprocal(png_fixed_point a) +{ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(1E10/a+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + png_fixed_point res; + + if (png_muldiv(&res, 100000, 100000, a)) + return res; +#endif + + return 0; /* error/overflow */ +} + +/* A local convenience routine. */ +static png_fixed_point +png_product2(png_fixed_point a, png_fixed_point b) +{ + /* The required result is 1/a * 1/b; the following preserves accuracy. */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = a * 1E-5; + r *= b; + r = floor(r+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + png_fixed_point res; + + if (png_muldiv(&res, a, b, 100000)) + return res; +#endif + + return 0; /* overflow */ +} + +/* The inverse of the above. */ +png_fixed_point +png_reciprocal2(png_fixed_point a, png_fixed_point b) +{ + /* The required result is 1/a * 1/b; the following preserves accuracy. */ +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = 1E15/a; + r /= b; + r = floor(r+.5); + + if (r <= 2147483647. && r >= -2147483648.) + return (png_fixed_point)r; +#else + /* This may overflow because the range of png_fixed_point isn't symmetric, + * but this API is only used for the product of file and screen gamma so it + * doesn't matter that the smallest number it can produce is 1/21474, not + * 1/100000 + */ + png_fixed_point res = png_product2(a, b); + + if (res != 0) + return png_reciprocal(res); +#endif + + return 0; /* overflow */ +} +#endif /* READ_GAMMA */ + +#ifdef PNG_CHECK_cHRM_SUPPORTED +/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2, + * 2010: moved from pngset.c) */ +/* + * Multiply two 32-bit numbers, V1 and V2, using 32-bit + * arithmetic, to produce a 64-bit result in the HI/LO words. + * + * A B + * x C D + * ------ + * AD || BD + * AC || CB || 0 + * + * where A and B are the high and low 16-bit words of V1, + * C and D are the 16-bit words of V2, AD is the product of + * A and D, and X || Y is (X << 16) + Y. +*/ + +void /* PRIVATE */ +png_64bit_product (long v1, long v2, unsigned long *hi_product, + unsigned long *lo_product) +{ + int a, b, c, d; + long lo, hi, x, y; + + a = (v1 >> 16) & 0xffff; + b = v1 & 0xffff; + c = (v2 >> 16) & 0xffff; + d = v2 & 0xffff; + + lo = b * d; /* BD */ + x = a * d + c * b; /* AD + CB */ + y = ((lo >> 16) & 0xffff) + x; + + lo = (lo & 0xffff) | ((y & 0xffff) << 16); + hi = (y >> 16) & 0xffff; + + hi += a * c; /* AC */ + + *hi_product = (unsigned long)hi; + *lo_product = (unsigned long)lo; +} +#endif /* CHECK_cHRM */ + +#ifdef PNG_READ_GAMMA_SUPPORTED /* gamma table code */ +#ifndef PNG_FLOATING_ARITHMETIC_SUPPORTED +/* Fixed point gamma. + * + * To calculate gamma this code implements fast log() and exp() calls using only + * fixed point arithmetic. This code has sufficient precision for either 8-bit + * or 16-bit sample values. + * + * The tables used here were calculated using simple 'bc' programs, but C double + * precision floating point arithmetic would work fine. The programs are given + * at the head of each table. + * + * 8-bit log table + * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to + * 255, so it's the base 2 logarithm of a normalized 8-bit floating point + * mantissa. The numbers are 32-bit fractions. + */ +static png_uint_32 +png_8bit_l2[128] = +{ +# ifdef PNG_DO_BC + for (i=128;i<256;++i) { .5 - l(i/255)/l(2)*65536*65536; } +# else + 4270715492U, 4222494797U, 4174646467U, 4127164793U, 4080044201U, 4033279239U, + 3986864580U, 3940795015U, 3895065449U, 3849670902U, 3804606499U, 3759867474U, + 3715449162U, 3671346997U, 3627556511U, 3584073329U, 3540893168U, 3498011834U, + 3455425220U, 3413129301U, 3371120137U, 3329393864U, 3287946700U, 3246774933U, + 3205874930U, 3165243125U, 3124876025U, 3084770202U, 3044922296U, 3005329011U, + 2965987113U, 2926893432U, 2888044853U, 2849438323U, 2811070844U, 2772939474U, + 2735041326U, 2697373562U, 2659933400U, 2622718104U, 2585724991U, 2548951424U, + 2512394810U, 2476052606U, 2439922311U, 2404001468U, 2368287663U, 2332778523U, + 2297471715U, 2262364947U, 2227455964U, 2192742551U, 2158222529U, 2123893754U, + 2089754119U, 2055801552U, 2022034013U, 1988449497U, 1955046031U, 1921821672U, + 1888774511U, 1855902668U, 1823204291U, 1790677560U, 1758320682U, 1726131893U, + 1694109454U, 1662251657U, 1630556815U, 1599023271U, 1567649391U, 1536433567U, + 1505374214U, 1474469770U, 1443718700U, 1413119487U, 1382670639U, 1352370686U, + 1322218179U, 1292211689U, 1262349810U, 1232631153U, 1203054352U, 1173618059U, + 1144320946U, 1115161701U, 1086139034U, 1057251672U, 1028498358U, 999877854U, + 971388940U, 943030410U, 914801076U, 886699767U, 858725327U, 830876614U, + 803152505U, 775551890U, 748073672U, 720716771U, 693480120U, 666362667U, + 639363374U, 612481215U, 585715177U, 559064263U, 532527486U, 506103872U, + 479792461U, 453592303U, 427502463U, 401522014U, 375650043U, 349885648U, + 324227938U, 298676034U, 273229066U, 247886176U, 222646516U, 197509248U, + 172473545U, 147538590U, 122703574U, 97967701U, 73330182U, 48790236U, + 24347096U, 0U +# endif + +#if 0 + /* The following are the values for 16-bit tables - these work fine for the + * 8-bit conversions but produce very slightly larger errors in the 16-bit + * log (about 1.2 as opposed to 0.7 absolute error in the final value). To + * use these all the shifts below must be adjusted appropriately. + */ + 65166, 64430, 63700, 62976, 62257, 61543, 60835, 60132, 59434, 58741, 58054, + 57371, 56693, 56020, 55352, 54689, 54030, 53375, 52726, 52080, 51439, 50803, + 50170, 49542, 48918, 48298, 47682, 47070, 46462, 45858, 45257, 44661, 44068, + 43479, 42894, 42312, 41733, 41159, 40587, 40020, 39455, 38894, 38336, 37782, + 37230, 36682, 36137, 35595, 35057, 34521, 33988, 33459, 32932, 32408, 31887, + 31369, 30854, 30341, 29832, 29325, 28820, 28319, 27820, 27324, 26830, 26339, + 25850, 25364, 24880, 24399, 23920, 23444, 22970, 22499, 22029, 21562, 21098, + 20636, 20175, 19718, 19262, 18808, 18357, 17908, 17461, 17016, 16573, 16132, + 15694, 15257, 14822, 14390, 13959, 13530, 13103, 12678, 12255, 11834, 11415, + 10997, 10582, 10168, 9756, 9346, 8937, 8531, 8126, 7723, 7321, 6921, 6523, + 6127, 5732, 5339, 4947, 4557, 4169, 3782, 3397, 3014, 2632, 2251, 1872, 1495, + 1119, 744, 372 +#endif +}; + +PNG_STATIC png_int_32 +png_log8bit(unsigned int x) +{ + unsigned int lg2 = 0; + /* Each time 'x' is multiplied by 2, 1 must be subtracted off the final log, + * because the log is actually negate that means adding 1. The final + * returned value thus has the range 0 (for 255 input) to 7.994 (for 1 + * input), return 7.99998 for the overflow (log 0) case - so the result is + * always at most 19 bits. + */ + if ((x &= 0xff) == 0) + return 0xffffffff; + + if ((x & 0xf0) == 0) + lg2 = 4, x <<= 4; + + if ((x & 0xc0) == 0) + lg2 += 2, x <<= 2; + + if ((x & 0x80) == 0) + lg2 += 1, x <<= 1; + + /* result is at most 19 bits, so this cast is safe: */ + return (png_int_32)((lg2 << 16) + ((png_8bit_l2[x-128]+32768)>>16)); +} + +/* The above gives exact (to 16 binary places) log2 values for 8-bit images, + * for 16-bit images we use the most significant 8 bits of the 16-bit value to + * get an approximation then multiply the approximation by a correction factor + * determined by the remaining up to 8 bits. This requires an additional step + * in the 16-bit case. + * + * We want log2(value/65535), we have log2(v'/255), where: + * + * value = v' * 256 + v'' + * = v' * f + * + * So f is value/v', which is equal to (256+v''/v') since v' is in the range 128 + * to 255 and v'' is in the range 0 to 255 f will be in the range 256 to less + * than 258. The final factor also needs to correct for the fact that our 8-bit + * value is scaled by 255, whereas the 16-bit values must be scaled by 65535. + * + * This gives a final formula using a calculated value 'x' which is value/v' and + * scaling by 65536 to match the above table: + * + * log2(x/257) * 65536 + * + * Since these numbers are so close to '1' we can use simple linear + * interpolation between the two end values 256/257 (result -368.61) and 258/257 + * (result 367.179). The values used below are scaled by a further 64 to give + * 16-bit precision in the interpolation: + * + * Start (256): -23591 + * Zero (257): 0 + * End (258): 23499 + */ +PNG_STATIC png_int_32 +png_log16bit(png_uint_32 x) +{ + unsigned int lg2 = 0; + + /* As above, but now the input has 16 bits. */ + if ((x &= 0xffff) == 0) + return 0xffffffff; + + if ((x & 0xff00) == 0) + lg2 = 8, x <<= 8; + + if ((x & 0xf000) == 0) + lg2 += 4, x <<= 4; + + if ((x & 0xc000) == 0) + lg2 += 2, x <<= 2; + + if ((x & 0x8000) == 0) + lg2 += 1, x <<= 1; + + /* Calculate the base logarithm from the top 8 bits as a 28-bit fractional + * value. + */ + lg2 <<= 28; + lg2 += (png_8bit_l2[(x>>8)-128]+8) >> 4; + + /* Now we need to interpolate the factor, this requires a division by the top + * 8 bits. Do this with maximum precision. + */ + x = ((x << 16) + (x >> 9)) / (x >> 8); + + /* Since we divided by the top 8 bits of 'x' there will be a '1' at 1<<24, + * the value at 1<<16 (ignoring this) will be 0 or 1; this gives us exactly + * 16 bits to interpolate to get the low bits of the result. Round the + * answer. Note that the end point values are scaled by 64 to retain overall + * precision and that 'lg2' is current scaled by an extra 12 bits, so adjust + * the overall scaling by 6-12. Round at every step. + */ + x -= 1U << 24; + + if (x <= 65536U) /* <= '257' */ + lg2 += ((23591U * (65536U-x)) + (1U << (16+6-12-1))) >> (16+6-12); + + else + lg2 -= ((23499U * (x-65536U)) + (1U << (16+6-12-1))) >> (16+6-12); + + /* Safe, because the result can't have more than 20 bits: */ + return (png_int_32)((lg2 + 2048) >> 12); +} + +/* The 'exp()' case must invert the above, taking a 20-bit fixed point + * logarithmic value and returning a 16 or 8-bit number as appropriate. In + * each case only the low 16 bits are relevant - the fraction - since the + * integer bits (the top 4) simply determine a shift. + * + * The worst case is the 16-bit distinction between 65535 and 65534, this + * requires perhaps spurious accuracy in the decoding of the logarithm to + * distinguish log2(65535/65534.5) - 10^-5 or 17 bits. There is little chance + * of getting this accuracy in practice. + * + * To deal with this the following exp() function works out the exponent of the + * frational part of the logarithm by using an accurate 32-bit value from the + * top four fractional bits then multiplying in the remaining bits. + */ +static png_uint_32 +png_32bit_exp[16] = +{ +# ifdef PNG_DO_BC + for (i=0;i<16;++i) { .5 + e(-i/16*l(2))*2^32; } +# else + /* NOTE: the first entry is deliberately set to the maximum 32-bit value. */ + 4294967295U, 4112874773U, 3938502376U, 3771522796U, 3611622603U, 3458501653U, + 3311872529U, 3171459999U, 3037000500U, 2908241642U, 2784941738U, 2666869345U, + 2553802834U, 2445529972U, 2341847524U, 2242560872U +# endif +}; + +/* Adjustment table; provided to explain the numbers in the code below. */ +#ifdef PNG_DO_BC +for (i=11;i>=0;--i){ print i, " ", (1 - e(-(2^i)/65536*l(2))) * 2^(32-i), "\n"} + 11 44937.64284865548751208448 + 10 45180.98734845585101160448 + 9 45303.31936980687359311872 + 8 45364.65110595323018870784 + 7 45395.35850361789624614912 + 6 45410.72259715102037508096 + 5 45418.40724413220722311168 + 4 45422.25021786898173001728 + 3 45424.17186732298419044352 + 2 45425.13273269940811464704 + 1 45425.61317555035558641664 + 0 45425.85339951654943850496 +#endif + +PNG_STATIC png_uint_32 +png_exp(png_fixed_point x) +{ + if (x > 0 && x <= 0xfffff) /* Else overflow or zero (underflow) */ + { + /* Obtain a 4-bit approximation */ + png_uint_32 e = png_32bit_exp[(x >> 12) & 0xf]; + + /* Incorporate the low 12 bits - these decrease the returned value by + * multiplying by a number less than 1 if the bit is set. The multiplier + * is determined by the above table and the shift. Notice that the values + * converge on 45426 and this is used to allow linear interpolation of the + * low bits. + */ + if (x & 0x800) + e -= (((e >> 16) * 44938U) + 16U) >> 5; + + if (x & 0x400) + e -= (((e >> 16) * 45181U) + 32U) >> 6; + + if (x & 0x200) + e -= (((e >> 16) * 45303U) + 64U) >> 7; + + if (x & 0x100) + e -= (((e >> 16) * 45365U) + 128U) >> 8; + + if (x & 0x080) + e -= (((e >> 16) * 45395U) + 256U) >> 9; + + if (x & 0x040) + e -= (((e >> 16) * 45410U) + 512U) >> 10; + + /* And handle the low 6 bits in a single block. */ + e -= (((e >> 16) * 355U * (x & 0x3fU)) + 256U) >> 9; + + /* Handle the upper bits of x. */ + e >>= x >> 16; + return e; + } + + /* Check for overflow */ + if (x <= 0) + return png_32bit_exp[0]; + + /* Else underflow */ + return 0; +} + +PNG_STATIC png_byte +png_exp8bit(png_fixed_point lg2) +{ + /* Get a 32-bit value: */ + png_uint_32 x = png_exp(lg2); + + /* Convert the 32-bit value to 0..255 by multiplying by 256-1, note that the + * second, rounding, step can't overflow because of the first, subtraction, + * step. + */ + x -= x >> 8; + return (png_byte)((x + 0x7fffffU) >> 24); +} + +PNG_STATIC png_uint_16 +png_exp16bit(png_fixed_point lg2) +{ + /* Get a 32-bit value: */ + png_uint_32 x = png_exp(lg2); + + /* Convert the 32-bit value to 0..65535 by multiplying by 65536-1: */ + x -= x >> 16; + return (png_uint_16)((x + 32767U) >> 16); +} +#endif /* FLOATING_ARITHMETIC */ + +png_byte +png_gamma_8bit_correct(unsigned int value, png_fixed_point gamma_val) +{ + if (value > 0 && value < 255) + { +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(255*pow(value/255.,gamma_val*.00001)+.5); + return (png_byte)r; +# else + png_int_32 lg2 = png_log8bit(value); + png_fixed_point res; + + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + return png_exp8bit(res); + + /* Overflow. */ + value = 0; +# endif + } + + return (png_byte)value; +} + +png_uint_16 +png_gamma_16bit_correct(unsigned int value, png_fixed_point gamma_val) +{ + if (value > 0 && value < 65535) + { +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + double r = floor(65535*pow(value/65535.,gamma_val*.00001)+.5); + return (png_uint_16)r; +# else + png_int_32 lg2 = png_log16bit(value); + png_fixed_point res; + + if (png_muldiv(&res, gamma_val, lg2, PNG_FP_1)) + return png_exp16bit(res); + + /* Overflow. */ + value = 0; +# endif + } + + return (png_uint_16)value; +} + +/* This does the right thing based on the bit_depth field of the + * png_struct, interpreting values as 8-bit or 16-bit. While the result + * is nominally a 16-bit value if bit depth is 8 then the result is + * 8-bit (as are the arguments.) + */ +png_uint_16 /* PRIVATE */ +png_gamma_correct(png_structp png_ptr, unsigned int value, + png_fixed_point gamma_val) +{ + if (png_ptr->bit_depth == 8) + return png_gamma_8bit_correct(value, gamma_val); + + else + return png_gamma_16bit_correct(value, gamma_val); +} + +/* This is the shared test on whether a gamma value is 'significant' - whether + * it is worth doing gamma correction. + */ +int /* PRIVATE */ +png_gamma_significant(png_fixed_point gamma_val) +{ + return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED || + gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED; +} + +/* Internal function to build a single 16-bit table - the table consists of + * 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount + * to shift the input values right (or 16-number_of_signifiant_bits). + * + * The caller is responsible for ensuring that the table gets cleaned up on + * png_error (i.e. if one of the mallocs below fails) - i.e. the *table argument + * should be somewhere that will be cleaned. + */ +static void +png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable, + PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) +{ + /* Various values derived from 'shift': */ + PNG_CONST unsigned int num = 1U << (8U - shift); + PNG_CONST unsigned int max = (1U << (16U - shift))-1U; + PNG_CONST unsigned int max_by_2 = 1U << (15U-shift); + unsigned int i; + + png_uint_16pp table = *ptable = + (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + + for (i = 0; i < num; i++) + { + png_uint_16p sub_table = table[i] = + (png_uint_16p)png_malloc(png_ptr, 256 * png_sizeof(png_uint_16)); + + /* The 'threshold' test is repeated here because it can arise for one of + * the 16-bit tables even if the others don't hit it. + */ + if (png_gamma_significant(gamma_val)) + { + /* The old code would overflow at the end and this would cause the + * 'pow' function to return a result >1, resulting in an + * arithmetic error. This code follows the spec exactly; ig is + * the recovered input sample, it always has 8-16 bits. + * + * We want input * 65535/max, rounded, the arithmetic fits in 32 + * bits (unsigned) so long as max <= 32767. + */ + unsigned int j; + for (j = 0; j < 256; j++) + { + png_uint_32 ig = (j << (8-shift)) + i; +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED + /* Inline the 'max' scaling operation: */ + double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5); + sub_table[j] = (png_uint_16)d; +# else + if (shift) + ig = (ig * 65535U + max_by_2)/max; + + sub_table[j] = png_gamma_16bit_correct(ig, gamma_val); +# endif + } + } + else + { + /* We must still build a table, but do it the fast way. */ + unsigned int j; + + for (j = 0; j < 256; j++) + { + png_uint_32 ig = (j << (8-shift)) + i; + + if (shift) + ig = (ig * 65535U + max_by_2)/max; + + sub_table[j] = (png_uint_16)ig; + } + } + } +} + +/* NOTE: this function expects the *inverse* of the overall gamma transformation + * required. + */ +static void +png_build_16to8_table(png_structp png_ptr, png_uint_16pp *ptable, + PNG_CONST unsigned int shift, PNG_CONST png_fixed_point gamma_val) +{ + PNG_CONST unsigned int num = 1U << (8U - shift); + PNG_CONST unsigned int max = (1U << (16U - shift))-1U; + unsigned int i; + png_uint_32 last; + + png_uint_16pp table = *ptable = + (png_uint_16pp)png_calloc(png_ptr, num * png_sizeof(png_uint_16p)); + + /* 'num' is the number of tables and also the number of low bits of the + * input 16-bit value used to select a table. Each table is itself indexed + * by the high 8 bits of the value. + */ + for (i = 0; i < num; i++) + table[i] = (png_uint_16p)png_malloc(png_ptr, + 256 * png_sizeof(png_uint_16)); + + /* 'gamma_val' is set to the reciprocal of the value calculated above, so + * pow(out,g) is an *input* value. 'last' is the last input value set. + * + * In the loop 'i' is used to find output values. Since the output is + * 8-bit there are only 256 possible values. The tables are set up to + * select the closest possible output value for each input by finding + * the input value at the boundary between each pair of output values + * and filling the table up to that boundary with the lower output + * value. + * + * The boundary values are 0.5,1.5..253.5,254.5. Since these are 9-bit + * values the code below uses a 16-bit value in i; the values start at + * 128.5 (for 0.5) and step by 257, for a total of 254 values (the last + * entries are filled with 255). Start i at 128 and fill all 'last' + * table entries <= 'max' + */ + last = 0; + for (i = 0; i < 255; ++i) /* 8-bit output value */ + { + /* Find the corresponding maximum input value */ + png_uint_16 out = (png_uint_16)(i * 257U); /* 16-bit output value */ + + /* Find the boundary value in 16 bits: */ + png_uint_32 bound = png_gamma_16bit_correct(out+128U, gamma_val); + + /* Adjust (round) to (16-shift) bits: */ + bound = (bound * max + 32768U)/65535U + 1U; + + while (last < bound) + { + table[last & (0xffU >> shift)][last >> (8U - shift)] = out; + last++; + } + } + + /* And fill in the final entries. */ + while (last < (num << 8)) + { + table[last & (0xff >> shift)][last >> (8U - shift)] = 65535U; + last++; + } +} + +/* Build a single 8-bit table: same as the 16-bit case but much simpler (and + * typically much faster). Note that libpng currently does no sBIT processing + * (apparently contrary to the spec) so a 256-entry table is always generated. + */ +static void +png_build_8bit_table(png_structp png_ptr, png_bytepp ptable, + PNG_CONST png_fixed_point gamma_val) +{ + unsigned int i; + png_bytep table = *ptable = (png_bytep)png_malloc(png_ptr, 256); + + if (png_gamma_significant(gamma_val)) for (i=0; i<256; i++) + table[i] = png_gamma_8bit_correct(i, gamma_val); + + else for (i=0; i<256; ++i) + table[i] = (png_byte)i; +} + +/* Used from png_read_destroy and below to release the memory used by the gamma + * tables. + */ +void /* PRIVATE */ +png_destroy_gamma_table(png_structp png_ptr) +{ + png_free(png_ptr, png_ptr->gamma_table); + png_ptr->gamma_table = NULL; + + if (png_ptr->gamma_16_table != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_table[i]); + } + png_free(png_ptr, png_ptr->gamma_16_table); + png_ptr->gamma_16_table = NULL; + } + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + png_free(png_ptr, png_ptr->gamma_from_1); + png_ptr->gamma_from_1 = NULL; + png_free(png_ptr, png_ptr->gamma_to_1); + png_ptr->gamma_to_1 = NULL; + + if (png_ptr->gamma_16_from_1 != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_from_1[i]); + } + png_free(png_ptr, png_ptr->gamma_16_from_1); + png_ptr->gamma_16_from_1 = NULL; + } + if (png_ptr->gamma_16_to_1 != NULL) + { + int i; + int istop = (1 << (8 - png_ptr->gamma_shift)); + for (i = 0; i < istop; i++) + { + png_free(png_ptr, png_ptr->gamma_16_to_1[i]); + } + png_free(png_ptr, png_ptr->gamma_16_to_1); + png_ptr->gamma_16_to_1 = NULL; + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ +} + +/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit + * tables, we don't make a full table if we are reducing to 8-bit in + * the future. Note also how the gamma_16 tables are segmented so that + * we don't need to allocate > 64K chunks for a full 16-bit table. + */ +void /* PRIVATE */ +png_build_gamma_table(png_structp png_ptr, int bit_depth) +{ + png_debug(1, "in png_build_gamma_table"); + + /* Remove any existing table; this copes with multiple calls to + * png_read_update_info. The warning is because building the gamma tables + * multiple times is a performance hit - it's harmless but the ability to call + * png_read_update_info() multiple times is new in 1.5.6 so it seems sensible + * to warn if the app introduces such a hit. + */ + if (png_ptr->gamma_table != NULL || png_ptr->gamma_16_table != NULL) + { + png_warning(png_ptr, "gamma table being rebuilt"); + png_destroy_gamma_table(png_ptr); + } + + if (bit_depth <= 8) + { + png_build_8bit_table(png_ptr, &png_ptr->gamma_table, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + { + png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1, + png_reciprocal(png_ptr->gamma)); + + png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1, + png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : + png_ptr->gamma/* Probably doing rgb_to_gray */); + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ + } + else + { + png_byte shift, sig_bit; + + if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + { + sig_bit = png_ptr->sig_bit.red; + + if (png_ptr->sig_bit.green > sig_bit) + sig_bit = png_ptr->sig_bit.green; + + if (png_ptr->sig_bit.blue > sig_bit) + sig_bit = png_ptr->sig_bit.blue; + } + else + sig_bit = png_ptr->sig_bit.gray; + + /* 16-bit gamma code uses this equation: + * + * ov = table[(iv & 0xff) >> gamma_shift][iv >> 8] + * + * Where 'iv' is the input color value and 'ov' is the output value - + * pow(iv, gamma). + * + * Thus the gamma table consists of up to 256 256-entry tables. The table + * is selected by the (8-gamma_shift) most significant of the low 8 bits of + * the color value then indexed by the upper 8 bits: + * + * table[low bits][high 8 bits] + * + * So the table 'n' corresponds to all those 'iv' of: + * + * ..<(n+1 << gamma_shift)-1> + * + */ + if (sig_bit > 0 && sig_bit < 16U) + shift = (png_byte)(16U - sig_bit); /* shift == insignificant bits */ + + else + shift = 0; /* keep all 16 bits */ + + if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) + { + /* PNG_MAX_GAMMA_8 is the number of bits to keep - effectively + * the significant bits in the *input* when the output will + * eventually be 8 bits. By default it is 11. + */ + if (shift < (16U - PNG_MAX_GAMMA_8)) + shift = (16U - PNG_MAX_GAMMA_8); + } + + if (shift > 8U) + shift = 8U; /* Guarantees at least one table! */ + + png_ptr->gamma_shift = shift; + +#ifdef PNG_16BIT_SUPPORTED + /* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now + * PNG_COMPOSE). This effectively smashed the background calculation for + * 16-bit output because the 8-bit table assumes the result will be reduced + * to 8 bits. + */ + if (png_ptr->transformations & (PNG_16_TO_8 | PNG_SCALE_16_TO_8)) +#endif + png_build_16to8_table(png_ptr, &png_ptr->gamma_16_table, shift, + png_ptr->screen_gamma > 0 ? png_product2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); + +#ifdef PNG_16BIT_SUPPORTED + else + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_table, shift, + png_ptr->screen_gamma > 0 ? png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma) : PNG_FP_1); +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + if (png_ptr->transformations & (PNG_COMPOSE | PNG_RGB_TO_GRAY)) + { + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_to_1, shift, + png_reciprocal(png_ptr->gamma)); + + /* Notice that the '16 from 1' table should be full precision, however + * the lookup on this table still uses gamma_shift, so it can't be. + * TODO: fix this. + */ + png_build_16bit_table(png_ptr, &png_ptr->gamma_16_from_1, shift, + png_ptr->screen_gamma > 0 ? png_reciprocal(png_ptr->screen_gamma) : + png_ptr->gamma/* Probably doing rgb_to_gray */); + } +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ + } +} +#endif /* READ_GAMMA */ +#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ diff --git a/ExternalLibs/glpng/png/png.h b/ExternalLibs/glpng/png/png.h index c562d38..657aa5a 100644 --- a/ExternalLibs/glpng/png/png.h +++ b/ExternalLibs/glpng/png/png.h @@ -1,2056 +1,2652 @@ - -/* png.h - header file for PNG reference library - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see the COPYRIGHT NOTICE below. - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998 Glenn Randers-Pehrson - * - * Note about libpng version numbers: - * - * Due to various miscommunications, unforeseen code incompatibilities - * and occasional factors outside the authors' control, version numbering - * on the library has not always been consistent and straightforward. - * The following table summarizes matters since version 0.89c, which was - * the first widely used release: - * - * source png.h png.h shared-lib - * version string int version - * ------- ------ ----- ---------- - * 0.89c ("1.0 beta 3") 0.89 89 1.0.89 - * 0.90 ("1.0 beta 4") 0.90 90 0.90 [should have been 2.0.90] - * 0.95 ("1.0 beta 5") 0.95 95 0.95 [should have been 2.0.95] - * 0.96 ("1.0 beta 6") 0.96 96 0.96 [should have been 2.0.96] - * 0.97b ("1.00.97 beta 7") 1.00.97 97 1.0.1 [should have been 2.0.97] - * 0.97c 0.97 97 2.0.97 - * 0.98 0.98 98 2.0.98 - * 0.99 0.99 98 2.0.99 - * 0.99a-m 0.99 99 2.0.99 - * 1.00 1.00 100 2.1.0 [int should be 10000] - * 1.0.0 1.0.0 100 2.1.0 [int should be 10000] - * 1.0.1 1.0.1 10001 2.1.0 - * 1.0.1a-e 1.0.1a-e 10002 2.1.0.1a-e - * - * Henceforth the source version will match the shared-library minor - * and patch numbers; the shared-library major version number will be - * used for changes in backward compatibility, as it is intended. The - * PNG_PNGLIB_VER macro, which is not used within libpng but is available - * for applications, is an unsigned integer of the form xyyzz corresponding - * to the source version x.y.z (leading zeros in y and z). - * - * See libpng.txt or libpng.3 for more information. The PNG specification - * is available as RFC 2083 - * and as a W3C Recommendation - * - * Contributing Authors: - * John Bowler - * Kevin Bracey - * Sam Bushell - * Andreas Dilger - * Magnus Holmgren - * Tom Lane - * Dave Martindale - * Glenn Randers-Pehrson - * Greg Roelofs - * Guy Eric Schalnat - * Paul Schmidt - * Tom Tanner - * Willem van Schaik - * Tim Wegner - * - * The contributing authors would like to thank all those who helped - * with testing, bug fixes, and patience. This wouldn't have been - * possible without all of you. - * - * Thanks to Frank J. T. Wojcik for helping with the documentation. - * - * COPYRIGHT NOTICE: - * - * The PNG Reference Library is supplied "AS IS". The Contributing Authors - * and Group 42, Inc. disclaim all warranties, expressed or implied, - * including, without limitation, the warranties of merchantability and of - * fitness for any purpose. The Contributing Authors and Group 42, Inc. - * assume no liability for direct, indirect, incidental, special, exemplary, - * or consequential damages, which may result from the use of the PNG - * Reference Library, even if advised of the possibility of such damage. - * - * Permission is hereby granted to use, copy, modify, and distribute this - * source code, or portions hereof, for any purpose, without fee, subject - * to the following restrictions: - * 1. The origin of this source code must not be misrepresented. - * 2. Altered versions must be plainly marked as such and must not be - * misrepresented as being the original source. - * 3. This Copyright notice may not be removed or altered from any source or - * altered source distribution. - * - * The Contributing Authors and Group 42, Inc. specifically permit, without - * fee, and encourage the use of this source code as a component to - * supporting the PNG file format in commercial products. If you use this - * source code in a product, acknowledgment is not required but would be - * appreciated. - */ - -#ifndef _PNG_H -#define _PNG_H - -//#ifdef __cplusplus -//extern "C" { -//#endif /* __cplusplus */ - -/* This is not the place to learn how to use libpng. The file libpng.txt - * describes how to use libpng, and the file example.c summarizes it - * with some code on which to build. This file is useful for looking - * at the actual function definitions and structure components. - */ - -/* include the compression library's header */ -#include - -/* include all user configurable info */ -#include "pngconf.h" - -/* This file is arranged in several sections. The first section contains - * structure and type definitions. The second section contains the external - * library functions, while the third has the internal library functions, - * which applications aren't expected to use directly. - */ - -/* Version information for png.h - this should match the version in png.c */ -#define PNG_LIBPNG_VER_STRING "1.0.2" - -/* Careful here. At one time, Guy wanted to use 082, but that would be octal. - * We must not include leading zeros. - * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only - * version 1.0.0 was mis-numbered 100 instead of 10000). From - * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=bugfix */ -#define PNG_LIBPNG_VER 10002 /* 1.0.2 */ - -/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) -/* Version information for C files, stored in png.c. This had better match - * the version above. - */ -extern char png_libpng_ver[12]; /* need room for 99.99.99aa */ - -/* Structures to facilitate easy interlacing. See png.c for more details */ -extern int FARDATA png_pass_start[7]; -extern int FARDATA png_pass_inc[7]; -extern int FARDATA png_pass_ystart[7]; -extern int FARDATA png_pass_yinc[7]; -extern int FARDATA png_pass_mask[7]; -extern int FARDATA png_pass_dsp_mask[7]; - -#endif /* PNG_NO_EXTERN */ - -/* Three color definitions. The order of the red, green, and blue, (and the - * exact size) is not important, although the size of the fields need to - * be png_byte or png_uint_16 (as defined below). - */ -typedef struct png_color_struct -{ - png_byte red; - png_byte green; - png_byte blue; -} png_color; -typedef png_color FAR * png_colorp; -typedef png_color FAR * FAR * png_colorpp; - -typedef struct png_color_16_struct -{ - png_byte index; /* used for palette files */ - png_uint_16 red; /* for use in red green blue files */ - png_uint_16 green; - png_uint_16 blue; - png_uint_16 gray; /* for use in grayscale files */ -} png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; - -typedef struct png_color_8_struct -{ - png_byte red; /* for use in red green blue files */ - png_byte green; - png_byte blue; - png_byte gray; /* for use in grayscale files */ - png_byte alpha; /* for alpha channel files */ -} png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; - -/* png_text holds the text in a PNG file, and whether they are compressed - in the PNG file or not. The "text" field points to a regular C string. */ -typedef struct png_text_struct -{ - int compression; /* compression value, see PNG_TEXT_COMPRESSION_ */ - png_charp key; /* keyword, 1-79 character description of "text" */ - png_charp text; /* comment, may be an empty string (ie "") */ - png_size_t text_length; /* length of "text" field */ -} png_text; -typedef png_text FAR * png_textp; -typedef png_text FAR * FAR * png_textpp; - -/* Supported compression types for text in PNG files (tEXt, and zTXt). - * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ -#define PNG_TEXT_COMPRESSION_NONE_WR -3 -#define PNG_TEXT_COMPRESSION_zTXt_WR -2 -#define PNG_TEXT_COMPRESSION_NONE -1 -#define PNG_TEXT_COMPRESSION_zTXt 0 -#define PNG_TEXT_COMPRESSION_LAST 1 /* Not a valid value */ - -/* png_time is a way to hold the time in an machine independent way. - * Two conversions are provided, both from time_t and struct tm. There - * is no portable way to convert to either of these structures, as far - * as I know. If you know of a portable way, send it to me. As a side - * note - PNG is Year 2000 compliant! - */ -typedef struct png_time_struct -{ - png_uint_16 year; /* full year, as in, 1995 */ - png_byte month; /* month of year, 1 - 12 */ - png_byte day; /* day of month, 1 - 31 */ - png_byte hour; /* hour of day, 0 - 23 */ - png_byte minute; /* minute of hour, 0 - 59 */ - png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ -} png_time; -typedef png_time FAR * png_timep; -typedef png_time FAR * FAR * png_timepp; - -/* png_info is a structure that holds the information in a PNG file so - * that the application can find out the characteristics of the image. - * If you are reading the file, this structure will tell you what is - * in the PNG file. If you are writing the file, fill in the information - * you want to put into the PNG file, then call png_write_info(). - * The names chosen should be very close to the PNG specification, so - * consult that document for information about the meaning of each field. - * - * With libpng < 0.95, it was only possible to directly set and read the - * the values in the png_info_struct, which meant that the contents and - * order of the values had to remain fixed. With libpng 0.95 and later, - * however, there are now functions that abstract the contents of - * png_info_struct from the application, so this makes it easier to use - * libpng with dynamic libraries, and even makes it possible to use - * libraries that don't have all of the libpng ancillary chunk-handing - * functionality. - * - * In any case, the order of the parameters in png_info_struct should NOT - * be changed for as long as possible to keep compatibility with applications - * that use the old direct-access method with png_info_struct. - */ -typedef struct png_info_struct -{ - /* the following are necessary for every PNG file */ - png_uint_32 width; /* width of image in pixels (from IHDR) */ - png_uint_32 height; /* height of image in pixels (from IHDR) */ - png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */ - png_uint_32 rowbytes; /* bytes needed to hold an untransformed row */ - png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */ - png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */ - png_uint_16 num_trans; /* number of transparent palette color (tRNS) */ - png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */ - png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */ - png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ - png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ - png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - - /* The following is informational only on read, and not used on writes. */ - png_byte channels; /* number of data channels per pixel (1, 3, 4)*/ - png_byte pixel_depth; /* number of bits per pixel */ - png_byte spare_byte; /* to align the data, and for future use */ - png_byte signature[8]; /* magic bytes read by libpng from start of file */ - - /* The rest of the data is optional. If you are reading, check the - * valid field to see if the information in these are valid. If you - * are writing, set the valid field to those chunks you want written, - * and initialize the appropriate fields below. - */ - -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) || \ - defined(PNG_READ_GAMMA_SUPPORTED) - /* The gAMA chunk describes the gamma characteristics of the system - * on which the image was created, normally in the range [1.0, 2.5]. - * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. - */ - float gamma; /* gamma value of image, if (valid & PNG_INFO_gAMA) */ -#endif /* PNG_READ_gAMA_SUPPORTED || PNG_WRITE_gAMA_SUPPORTED */ - -#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED) - /* GR-P, 0.96a */ - /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ - png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ -#endif /* PNG_READ_sRGB_SUPPORTED || PNG_WRITE_sRGB_SUPPORTED */ - -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ - defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) - /* The tEXt and zTXt chunks contain human-readable textual data in - * uncompressed and compressed forms, respectively. The data in "text" - * is an array of pointers to uncompressed, null-terminated C strings. - * Each chunk has a keyword that describes the textual data contained - * in that chunk. Keywords are not required to be unique, and the text - * string may be empty. Any number of text chunks may be in an image. - */ - int num_text; /* number of comments read/to write */ - int max_text; /* current size of text array */ - png_textp text; /* array of comments read/to write */ -#endif /* PNG_READ_OR_WRITE_tEXt_OR_zTXt_SUPPORTED */ -#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED) - /* The tIME chunk holds the last time the displayed image data was - * modified. See the png_time struct for the contents of this struct. - */ - png_time mod_time; -#endif /* PNG_READ_tIME_SUPPORTED || PNG_WRITE_tIME_SUPPORTED */ -#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED) - /* The sBIT chunk specifies the number of significant high-order bits - * in the pixel data. Values are in the range [1, bit_depth], and are - * only specified for the channels in the pixel data. The contents of - * the low-order bits is not specified. Data is valid if - * (valid & PNG_INFO_sBIT) is non-zero. - */ - png_color_8 sig_bit; /* significant bits in color channels */ -#endif /* PNG_READ_sBIT_SUPPORTED || PNG_WRITE_sBIT_SUPPORTED */ -#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED) || \ - defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The tRNS chunk supplies transparency data for paletted images and - * other image types that don't need a full alpha channel. There are - * "num_trans" transparency values for a paletted image, stored in the - * same order as the palette colors, starting from index 0. Values - * for the data are in the range [0, 255], ranging from fully transparent - * to fully opaque, respectively. For non-paletted images, there is a - * single color specified that should be treated as fully transparent. - * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. - */ - png_bytep trans; /* transparent values for paletted image */ - png_color_16 trans_values; /* transparent color for non-palette image */ -#endif /* PNG_READ_tRNS_SUPPORTED || PNG_WRITE_tRNS_SUPPORTED */ -#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED) || \ - defined(PNG_READ_BACKGROUND_SUPPORTED) - /* The bKGD chunk gives the suggested image background color if the - * display program does not have its own background color and the image - * is needs to composited onto a background before display. The colors - * in "background" are normally in the same color space/depth as the - * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. - */ - png_color_16 background; -#endif /* PNG_READ_bKGD_SUPPORTED || PNG_WRITE_bKGD_SUPPORTED */ -#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) - /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards - * and downwards from the top-left corner of the display, page, or other - * application-specific co-ordinate space. See the PNG_OFFSET_ defines - * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. - */ - png_uint_32 x_offset; /* x offset on page */ - png_uint_32 y_offset; /* y offset on page */ - png_byte offset_unit_type; /* offset units type */ -#endif /* PNG_READ_oFFs_SUPPORTED || PNG_WRITE_oFFs_SUPPORTED */ -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) - /* The pHYs chunk gives the physical pixel density of the image for - * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ - * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. - */ - png_uint_32 x_pixels_per_unit; /* horizontal pixel density */ - png_uint_32 y_pixels_per_unit; /* vertical pixel density */ - png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */ -#endif /* PNG_READ_pHYs_SUPPORTED || PNG_WRITE_pHYs_SUPPORTED */ -#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED) - /* The hIST chunk contains the relative frequency or importance of the - * various palette entries, so that a viewer can intelligently select a - * reduced-color palette, if required. Data is an array of "num_palette" - * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) - * is non-zero. - */ - png_uint_16p hist; -#endif /* PNG_READ_hIST_SUPPORTED || PNG_WRITE_hIST_SUPPORTED */ -#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED) - /* The cHRM chunk describes the CIE color characteristics of the monitor - * on which the PNG was created. This data allows the viewer to do gamut - * mapping of the input image to ensure that the viewer sees the same - * colors in the image as the creator. Values are in the range - * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. - */ - float x_white; - float y_white; - float x_red; - float y_red; - float x_green; - float y_green; - float x_blue; - float y_blue; -#endif /* PNG_READ_cHRM_SUPPORTED || PNG_WRITE_cHRM_SUPPORTED */ -#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) - /* The pCAL chunk describes a transformation between the stored pixel - * values and original physcical data values used to create the image. - * The integer range [0, 2^bit_depth - 1] maps to the floating-point - * range given by [pcal_X0, pcal_X1], and are further transformed by a - * (possibly non-linear) transformation function given by "pcal_type" - * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ - * defines below, and the PNG-Group's Scientific Visualization extension - * chunks document png-scivis-19970203 for a complete description of the - * transformations and how they should be implemented, as well as the - * png-extensions document for a description of the ASCII parameter - * strings. Data values are valid if (valid & PNG_INFO_pCAL) non-zero. - */ - png_charp pcal_purpose; /* pCAL chunk description string */ - png_int_32 pcal_X0; /* minimum value */ - png_int_32 pcal_X1; /* maximum value */ - png_charp pcal_units; /* Latin-1 string giving physical units */ - png_charpp pcal_params; /* ASCII strings containing parameter values */ - png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */ - png_byte pcal_nparams; /* number of parameters given in pcal_params */ -#endif /* PNG_READ_pCAL_SUPPORTED || PNG_WRITE_pCAL_SUPPORTED */ -} png_info; -typedef png_info FAR * png_infop; -typedef png_info FAR * FAR * png_infopp; - -/* These describe the color_type field in png_info. */ -/* color type masks */ -#define PNG_COLOR_MASK_PALETTE 1 -#define PNG_COLOR_MASK_COLOR 2 -#define PNG_COLOR_MASK_ALPHA 4 - -/* color types. Note that not all combinations are legal */ -#define PNG_COLOR_TYPE_GRAY 0 -#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) -#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) -#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) -#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) - -/* This is for compression type. PNG 1.0 only defines the single type. */ -#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ -#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE - -/* This is for filter type. PNG 1.0 only defines the single type. */ -#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ -#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE - -/* These are for the interlacing type. These values should NOT be changed. */ -#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ -#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ -#define PNG_INTERLACE_LAST 2 /* Not a valid value */ - -/* These are for the oFFs chunk. These values should NOT be changed. */ -#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ -#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ -#define PNG_OFFSET_LAST 2 /* Not a valid value */ - -/* These are for the pCAL chunk. These values should NOT be changed. */ -#define PNG_EQUATION_LINEAR 0 /* Linear transformation */ -#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ -#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ -#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ -#define PNG_EQUATION_LAST 4 /* Not a valid value */ - -/* These are for the pHYs chunk. These values should NOT be changed. */ -#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ -#define PNG_RESOLUTION_METER 1 /* pixels/meter */ -#define PNG_RESOLUTION_LAST 2 /* Not a valid value */ - -/* These are for the sRGB chunk. These values should NOT be changed. */ -#define PNG_sRGB_INTENT_SATURATION 0 -#define PNG_sRGB_INTENT_PERCEPTUAL 1 -#define PNG_sRGB_INTENT_ABSOLUTE 2 -#define PNG_sRGB_INTENT_RELATIVE 3 -#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ - - - -/* These determine if an ancillary chunk's data has been successfully read - * from the PNG header, or if the application has filled in the corresponding - * data in the info_struct to be written into the output file. The values - * of the PNG_INFO_ defines should NOT be changed. - */ -#define PNG_INFO_gAMA 0x0001 -#define PNG_INFO_sBIT 0x0002 -#define PNG_INFO_cHRM 0x0004 -#define PNG_INFO_PLTE 0x0008 -#define PNG_INFO_tRNS 0x0010 -#define PNG_INFO_bKGD 0x0020 -#define PNG_INFO_hIST 0x0040 -#define PNG_INFO_pHYs 0x0080 -#define PNG_INFO_oFFs 0x0100 -#define PNG_INFO_tIME 0x0200 -#define PNG_INFO_pCAL 0x0400 -#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ - -/* This is used for the transformation routines, as some of them - * change these values for the row. It also should enable using - * the routines for other purposes. - */ -typedef struct png_row_info_struct -{ - png_uint_32 width; /* width of row */ - png_uint_32 rowbytes; /* number of bytes in row */ - png_byte color_type; /* color type of row */ - png_byte bit_depth; /* bit depth of row */ - png_byte channels; /* number of channels (1, 2, 3, or 4) */ - png_byte pixel_depth; /* bits per pixel (depth * channels) */ -} png_row_info; - -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* These are the function types for the I/O functions and for the functions - * that allow the user to override the default I/O functions with his or her - * own. The png_error_ptr type should match that of user-supplied warning - * and error functions, while the png_rw_ptr type should match that of the - * user read/write data functions. - */ -typedef struct png_struct_def png_struct; -typedef png_struct FAR * png_structp; - -typedef void (*png_error_ptr) PNGARG((png_structp, png_const_charp)); -typedef void (*png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t)); -typedef void (*png_flush_ptr) PNGARG((png_structp)); -typedef void (*png_read_status_ptr) PNGARG((png_structp, png_uint_32, int)); -typedef void (*png_write_status_ptr) PNGARG((png_structp, png_uint_32, int)); -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -typedef void (*png_progressive_info_ptr) PNGARG((png_structp, png_infop)); -typedef void (*png_progressive_end_ptr) PNGARG((png_structp, png_infop)); -typedef void (*png_progressive_row_ptr) PNGARG((png_structp, png_bytep, - png_uint_32, int)); -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) -typedef void (*png_user_transform_ptr) PNGARG((png_structp, - png_row_infop, png_bytep)); -#endif /* PNG_READ|WRITE_USER_TRANSFORM_SUPPORTED */ - -typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t)); -typedef void (*png_free_ptr) PNGARG((png_structp, png_structp)); - -/* The structure that holds the information to read and write PNG files. - * The only people who need to care about what is inside of this are the - * people who will be modifying the library for their own special needs. - * It should NOT be accessed directly by an application, except to store - * the jmp_buf. - */ - -struct png_struct_def -{ - jmp_buf jmpbuf; /* used in png_error */ - - png_error_ptr error_fn; /* function for printing errors and aborting */ - png_error_ptr warning_fn; /* function for printing warnings */ - png_voidp error_ptr; /* user supplied struct for error functions */ - png_rw_ptr write_data_fn; /* function for writing output data */ - png_rw_ptr read_data_fn; /* function for reading input data */ -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_user_transform_ptr read_user_transform_fn; /* user read transform */ - png_user_transform_ptr write_user_transform_fn; /* user write transform */ -#endif - png_voidp io_ptr; /* ptr to application struct for I/O functions*/ - - png_uint_32 mode; /* tells us where we are in the PNG file */ - png_uint_32 flags; /* flags indicating various things to libpng */ - png_uint_32 transformations; /* which transformations to perform */ - - z_stream zstream; /* pointer to decompression structure (below) */ - png_bytep zbuf; /* buffer for zlib */ - png_size_t zbuf_size; /* size of zbuf */ - int zlib_level; /* holds zlib compression level */ - int zlib_method; /* holds zlib compression method */ - int zlib_window_bits; /* holds zlib compression window bits */ - int zlib_mem_level; /* holds zlib compression memory level */ - int zlib_strategy; /* holds zlib compression strategy */ - - png_uint_32 width; /* width of image in pixels */ - png_uint_32 height; /* height of image in pixels */ - png_uint_32 num_rows; /* number of rows in current pass */ - png_uint_32 usr_width; /* width of row at start of write */ - png_uint_32 rowbytes; /* size of row in bytes */ - png_uint_32 irowbytes; /* size of current interlaced row in bytes */ - png_uint_32 iwidth; /* width of current interlaced row in pixels */ - png_uint_32 row_number; /* current row in interlace pass */ - png_bytep prev_row; /* buffer to save previous (unfiltered) row */ - png_bytep row_buf; /* buffer to save current (unfiltered) row */ - png_bytep sub_row; /* buffer to save "sub" row when filtering */ - png_bytep up_row; /* buffer to save "up" row when filtering */ - png_bytep avg_row; /* buffer to save "avg" row when filtering */ - png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ - png_row_info row_info; /* used for transformation routines */ - - png_uint_32 idat_size; /* current IDAT size for read */ - png_uint_32 crc; /* current chunk CRC value */ - png_colorp palette; /* palette from the input file */ - png_uint_16 num_palette; /* number of color entries in palette */ - png_uint_16 num_trans; /* number of transparency values */ - png_byte chunk_name[5]; /* null-terminated name of current chunk */ - png_byte compression; /* file compression type (always 0) */ - png_byte filter; /* file filter type (always 0) */ - png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - png_byte pass; /* current interlace pass (0 - 6) */ - png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ - png_byte color_type; /* color type of file */ - png_byte bit_depth; /* bit depth of file */ - png_byte usr_bit_depth; /* bit depth of users row */ - png_byte pixel_depth; /* number of bits per pixel */ - png_byte channels; /* number of channels in file */ - png_byte usr_channels; /* channels at start of write */ - png_byte sig_bytes; /* magic bytes read/written from start of file */ - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) - png_uint_16 filler; /* filler bytes for pixel expansion */ -#endif /* PNG_READ_FILLER_SUPPORTED */ -#if defined(PNG_READ_bKGD_SUPPORTED) - png_byte background_gamma_type; - float background_gamma; - png_color_16 background; /* background color in screen gamma space */ -#if defined(PNG_READ_GAMMA_SUPPORTED) - png_color_16 background_1; /* background normalized to gamma 1.0 */ -#endif /* PNG_READ_GAMMA && PNG_READ_bKGD_SUPPORTED */ -#endif /* PNG_READ_bKGD_SUPPORTED */ -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_flush_ptr output_flush_fn;/* Function for flushing output */ - png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ - png_uint_32 flush_rows; /* number of rows written since last flush */ -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - int gamma_shift; /* number of "insignificant" bits 16-bit gamma */ - float gamma; /* file gamma value */ - float screen_gamma; /* screen gamma value (display_gamma/viewing_gamma */ -#endif /* PNG_READ_GAMMA_SUPPORTED */ -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep gamma_table; /* gamma table for 8 bit depth files */ - png_bytep gamma_from_1; /* converts from 1.0 to screen */ - png_bytep gamma_to_1; /* converts from file to 1.0 */ - png_uint_16pp gamma_16_table; /* gamma table for 16 bit depth files */ - png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ - png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ -#endif /* PNG_READ_GAMMA_SUPPORTED || PNG_WRITE_GAMMA_SUPPORTED */ -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined (PNG_READ_sBIT_SUPPORTED) - png_color_8 sig_bit; /* significant bits in each available channel */ -#endif /* PNG_READ_GAMMA_SUPPORTED || PNG_READ_sBIT_SUPPORTED */ -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) - png_color_8 shift; /* shift for significant bit tranformation */ -#endif /* PNG_READ_SHIFT_SUPPORTED || PNG_WRITE_SHIFT_SUPPORTED */ -#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ - || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep trans; /* transparency values for paletted files */ - png_color_16 trans_values; /* transparency values for non-paletted files */ -#endif /* PNG_READ|WRITE_tRNS_SUPPORTED||PNG_READ_EXPAND|BACKGROUND_SUPPORTED */ - png_read_status_ptr read_row_fn; /* called after each row is decoded */ - png_write_status_ptr write_row_fn; /* called after each row is encoded */ -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_progressive_info_ptr info_fn; /* called after header data fully read */ - png_progressive_row_ptr row_fn; /* called after each prog. row is decoded */ - png_progressive_end_ptr end_fn; /* called after image is complete */ - png_bytep save_buffer_ptr; /* current location in save_buffer */ - png_bytep save_buffer; /* buffer for previously read data */ - png_bytep current_buffer_ptr; /* current location in current_buffer */ - png_bytep current_buffer; /* buffer for recently used data */ - png_uint_32 push_length; /* size of current input chunk */ - png_uint_32 skip_length; /* bytes to skip in input data */ - png_size_t save_buffer_size; /* amount of data now in save_buffer */ - png_size_t save_buffer_max; /* total size of save_buffer */ - png_size_t buffer_size; /* total amount of available input data */ - png_size_t current_buffer_size; /* amount of data now in current_buffer */ - int process_mode; /* what push library is currently doing */ - int cur_palette; /* current push library palette index */ -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) - png_size_t current_text_size; /* current size of text input data */ - png_size_t current_text_left; /* how much text left to read in input */ - png_charp current_text; /* current text chunk buffer */ - png_charp current_text_ptr; /* current location in current_text */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_READ_tEXt/zTXt_SUPPORTED */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* for the Borland special 64K segment handler */ - png_bytepp offset_table_ptr; - png_bytep offset_table; - png_uint_16 offset_table_number; - png_uint_16 offset_table_count; - png_uint_16 offset_table_count_free; -#endif /* __TURBOC__&&!_Windows&&!__FLAT__ */ -#if defined(PNG_READ_DITHER_SUPPORTED) - png_bytep palette_lookup; /* lookup table for dithering */ - png_bytep dither_index; /* index translation for palette files */ -#endif /* PNG_READ_DITHER_SUPPORTED */ -#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_READ_hIST_SUPPORTED) - png_uint_16p hist; /* histogram */ -#endif -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_byte heuristic_method; /* heuristic for row filter selection */ - png_byte num_prev_filters; /* number of weights for previous rows */ - png_bytep prev_filters; /* filter type(s) of previous row(s) */ - png_uint_16p filter_weights; /* weight(s) for previous line(s) */ - png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ - png_uint_16p filter_costs; /* relative filter calculation cost */ - png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_charp time_buffer; /* String to hold RFC 1123 time text */ -#endif /* PNG_TIME_RFC1123_SUPPORTED */ -#ifdef PNG_USER_MEM_SUPPORTED - png_voidp mem_ptr; /* user supplied struct for mem functions */ - png_malloc_ptr malloc_fn; /* function for allocating memory */ - png_free_ptr free_fn; /* function for freeing memory */ -#endif /* PNG_USER_MEM_SUPPORTED */ -}; - -typedef png_struct FAR * FAR * png_structpp; - -/* Here are the function definitions most commonly used. This is not - * the place to find out how to use libpng. See libpng.txt for the - * full explanation, see example.c for the summary. This just provides - * a simple one line of the use of each function. - */ - -/* Tell lib we have already handled the first magic bytes. - * Handling more than 8 bytes from the beginning of the file is an error. - */ -extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, - int num_bytes)); - -/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a - * PNG file. Returns zero if the supplied bytes match the 8-byte PNG - * signature, and non-zero otherwise. Having num_to_check == 0 or - * start > 7 will always fail (ie return non-zero). - */ -extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, - png_size_t num_to_check)); - -/* Simple signature checking function. This is the same as calling - * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). - */ -extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num)); - -/* Allocate and initialize png_ptr struct for reading, and any other memory. */ -extern PNG_EXPORT(png_structp,png_create_read_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); - -/* Allocate and initialize png_ptr struct for writing, and any other memory */ -extern PNG_EXPORT(png_structp,png_create_write_struct) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); - -#ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_structp,png_create_read_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -extern PNG_EXPORT(png_structp,png_create_write_struct_2) - PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -#endif - -/* Write a PNG chunk - size, type, (optional) data, CRC. */ -extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_bytep data, png_size_t length)); - -/* Write the start of a PNG chunk - length and chunk name. */ -extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, - png_bytep chunk_name, png_uint_32 length)); - -/* Write the data of a PNG chunk started with png_write_chunk_start(). */ -extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); - -/* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); - -/* Allocate and initialize the info structure */ -extern PNG_EXPORT(png_infop,png_create_info_struct) - PNGARG((png_structp png_ptr)); - -/* Initialize the info structure (old interface - NOT DLL EXPORTED) */ -extern void png_info_init PNGARG((png_infop info_ptr)); - -/* Writes all the PNG information before the image. */ -extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* read the information before the actual image data. */ -extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -#if defined(PNG_TIME_RFC1123_SUPPORTED) -extern PNG_EXPORT(png_charp,png_convert_to_rfc1123) - PNGARG((png_structp png_ptr, png_timep ptime)); -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - -#if defined(PNG_WRITE_tIME_SUPPORTED) -/* convert from a struct tm to png_time */ -extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, - struct tm FAR * ttime)); - -/* convert from time_t to png_time. Uses gmtime() */ -extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, - time_t ttime)); -#endif /* PNG_WRITE_tIME_SUPPORTED */ - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expand data to 24 bit RGB, or 8 bit grayscale, with alpha if available. */ -extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_EXPAND_SUPPORTED */ - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* Use blue, green, red order for pixels. */ -extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_BGR_SUPPORTED || PNG_WRITE_BGR_SUPPORTED */ - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -/* Expand the grayscale to 24 bit RGB if necessary. */ -extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */ - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -/* Reduce RGB to grayscale. (Not yet implemented) */ -extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */ - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_STRIP_ALPHA_SUPPORTED */ - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_SWAP_ALPHA_SUPPORTED || PNG_WRITE_SWAP_ALPHA_SUPPORTED */ - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED || PNG_WRITE_INVERT_ALPHA_SUPPORTED */ - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte to 24-bit RGB images. */ -extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, - png_uint_32 filler, int flags)); - -/* The values of the PNG_FILLER_ defines should NOT be changed */ -#define PNG_FILLER_BEFORE 0 -#define PNG_FILLER_AFTER 1 -#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* Swap bytes in 16 bit depth files. */ -extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_SWAP_SUPPORTED || PNG_WRITE_SWAP_SUPPORTED */ - -#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) -/* Use 1 byte per pixel in 1, 2, or 4 bit depth files. */ -extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_PACK_SUPPORTED || PNG_WRITE_PACK_SUPPORTED */ - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) -/* Swap packing order of pixels in bytes. */ -extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_PACKSWAP_SUPPORTED || PNG_WRITE_PACKSWAP_SUPPOR */ - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) -/* Converts files to legal bit depths. */ -extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, - png_color_8p true_bits)); -#endif /* PNG_READ_SHIFT_SUPPORTED || PNG_WRITE_SHIFT_SUPPORTED */ - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* Have the code handle the interlacing. Returns the number of passes. */ -extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_INTERLACING_SUPPORTED || PNG_WRITE_INTERLACING_SUPPORTED */ - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -/* Invert monocrome files */ -extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_INVERT_SUPPORTED || PNG_WRITE_INVERT_SUPPORTED */ - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -/* Handle alpha and tRNS by replacing with a background color. */ -extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); -#define PNG_BACKGROUND_GAMMA_UNKNOWN 0 -#define PNG_BACKGROUND_GAMMA_SCREEN 1 -#define PNG_BACKGROUND_GAMMA_FILE 2 -#define PNG_BACKGROUND_GAMMA_UNIQUE 3 -#endif /* PNG_READ_BACKGROUND_SUPPORTED */ - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* strip the second byte of information from a 16 bit depth file. */ -extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); -#endif /* PNG_READ_16_TO_8_SUPPORTED */ - -#if defined(PNG_READ_DITHER_SUPPORTED) -/* Turn on dithering, and reduce the palette to the number of colors available. */ -extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette, int maximum_colors, - png_uint_16p histogram, int full_dither)); -#endif /* PNG_READ_DITHER_SUPPORTED */ - -#if defined(PNG_READ_GAMMA_SUPPORTED) -/* Handle gamma correction. Screen_gamma=(display_gamma/viewing_gamma) */ -extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, - double screen_gamma, double default_file_gamma)); -#endif /* PNG_READ_GAMMA_SUPPORTED */ - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -/* Set how many lines between output flushes - 0 for no flushing */ -extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); - -/* Flush the current PNG output buffer */ -extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ - -/* optional call to update the users info structure */ -extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, png_infop info_ptr)); - -/* read a row of data.*/ -extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, - png_bytep row, - png_bytep display_row)); - -/* read the whole image into memory at once. */ -extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, - png_bytepp image)); - -/* read the end of the PNG file. */ -extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* free any memory associated with the png_struct and the png_info_structs */ -extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp - png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); - -/* free all memory used by the read (old method - NOT DLL EXPORTED) */ -extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, - png_infop end_info_ptr)); - -/* Values for png_set_crc_action() to say how to handle CRC errors in - * ancillary and critical chunks, and whether to use the data contained - * therein. Note that it is impossible to "discard" data in a critical - * chunk. For versions prior to 0.90, the action was always error/quit, - * whereas in version 0.90 and later, the action for CRC errors in ancillary - * chunks is warn/discard. These values should NOT be changed. - * - * value action:critical action:ancillary - */ -#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ -#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ -#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ -#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ -#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ -#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ - -/* These functions give the user control over the scan-line filtering in - * libpng and the compression methods used by zlib. These functions are - * mainly useful for testing, as the defaults should work with most users. - * Those users who are tight on memory or want faster performance at the - * expense of compression can modify them. See the compression library - * header file (zlib.h) for an explination of the compression functions. - */ - -/* set the filtering method(s) used by libpng. Currently, the only valid - * value for "method" is 0. - */ -extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, - int filters)); - -/* Flags for png_set_filter() to say which filters to use. The flags - * are chosen so that they don't conflict with real filter types - * below, in case they are supplied instead of the #defined constants. - * These values should NOT be changed. - */ -#define PNG_NO_FILTERS 0x00 -#define PNG_FILTER_NONE 0x08 -#define PNG_FILTER_SUB 0x10 -#define PNG_FILTER_UP 0x20 -#define PNG_FILTER_AVG 0x40 -#define PNG_FILTER_PAETH 0x80 -#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ - PNG_FILTER_AVG | PNG_FILTER_PAETH) - -/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. - * These defines should NOT be changed. - */ -#define PNG_FILTER_VALUE_NONE 0 -#define PNG_FILTER_VALUE_SUB 1 -#define PNG_FILTER_VALUE_UP 2 -#define PNG_FILTER_VALUE_AVG 3 -#define PNG_FILTER_VALUE_PAETH 4 -#define PNG_FILTER_VALUE_LAST 5 - -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */ -/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ - * defines, either the default (minimum-sum-of-absolute-differences), or - * the experimental method (weighted-minimum-sum-of-absolute-differences). - * - * Weights are factors >= 1.0, indicating how important it is to keep the - * filter type consistent between rows. Larger numbers mean the current - * filter is that many times as likely to be the same as the "num_weights" - * previous filters. This is cumulative for each previous row with a weight. - * There needs to be "num_weights" values in "filter_weights", or it can be - * NULL if the weights aren't being specified. Weights have no influence on - * the selection of the first row filter. Well chosen weights can (in theory) - * improve the compression for a given image. - * - * Costs are factors >= 1.0 indicating the relative decoding costs of a - * filter type. Higher costs indicate more decoding expense, and are - * therefore less likely to be selected over a filter with lower computational - * costs. There needs to be a value in "filter_costs" for each valid filter - * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't - * setting the costs. Costs try to improve the speed of decompression without - * unduly increasing the compressed image size. - * - * A negative weight or cost indicates the default value is to be used, and - * values in the range [0.0, 1.0) indicate the value is to remain unchanged. - * The default values for both weights and costs are currently 1.0, but may - * change if good general weighting/cost heuristics can be found. If both - * the weights and costs are set to 1.0, this degenerates the WEIGHTED method - * to the UNWEIGHTED method, but with added encoding time/computation. - */ -extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, - int heuristic_method, int num_weights, png_doublep filter_weights, - png_doublep filter_costs)); -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ - -/* Heuristic used for row filter selection. These defines should NOT be - * changed. - */ -#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ -#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ -#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ -#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ - -/* Set the library compression level. Currently, valid values range from - * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 - * (0 - no compression, 9 - "maximal" compression). Note that tests have - * shown that zlib compression levels 3-6 usually perform as well as level 9 - * for PNG images, and do considerably fewer caclulations. In the future, - * these values may not correspond directly to the zlib compression levels. - */ -extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, - int level)); - -extern PNG_EXPORT(void,png_set_compression_mem_level) - PNGARG((png_structp png_ptr, int mem_level)); - -extern PNG_EXPORT(void,png_set_compression_strategy) - PNGARG((png_structp png_ptr, int strategy)); - -extern PNG_EXPORT(void,png_set_compression_window_bits) - PNGARG((png_structp png_ptr, int window_bits)); - -extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, - int method)); - -/* These next functions are called for input/output, memory, and error - * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, - * and call standard C I/O routines such as fread(), fwrite(), and - * fprintf(). These functions can be made to use other I/O routines - * at run time for those applications that need to handle I/O in a - * different manner by calling png_set_???_fn(). See libpng.txt for - * more information. - */ - -/* Initialize the input/output for the PNG file to the default functions. */ -extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, FILE *fp)); - -/* Replace the (error and abort), and warning functions with user - * supplied functions. If no messages are to be printed you must still - * write and use replacement functions. The replacement error_fn should - * still do a longjmp to the last setjmp location if you are using this - * method of error handling. If error_fn or warning_fn is NULL, the - * default function will be used. - */ -extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, - png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); - -/* Replace the default data output functions with a user supplied one(s). - * If buffered output is not used, then output_flush_fn can be set to NULL. - * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time - * output_flush_fn will be ignored (and thus can be NULL). - */ -extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); - -/* Replace the default data input function with a user supplied one. */ -extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, - png_voidp io_ptr, png_rw_ptr read_data_fn)); - -extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, - png_write_status_ptr write_row_fn)); - -#ifdef PNG_USER_MEM_SUPPORTED -/* Replace the default memory allocation functions with user supplied one(s). */ -extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, - png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); - -/* Return the user pointer associated with the memory functions */ -extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr read_user_transform_fn)); -#endif - -#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp - png_ptr, png_user_transform_ptr write_user_transform_fn)); -#endif - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -/* Sets the function callbacks for the push reader, and a pointer to a - * user-defined structure available to the callback functions. - */ -extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, - png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn)); - -/* returns the user pointer associated with the push read functions */ -extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) - PNGARG((png_structp png_ptr)); - -/* function to be called when data becomes available */ -extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); - -/* function that combines rows. Not very much different than the - * png_combine_row() call. Is this even used????? - */ -extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, - png_bytep old_row, png_bytep new_row)); -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, - png_uint_32 size)); - -/* frees a pointer allocated by png_malloc() */ -extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); - -#ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, - png_uint_32 size)); -extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, - png_voidp ptr)); -#endif /* PNG_USER_MEM_SUPPORTED */ - -extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr, - png_voidp s1, png_voidp s2, png_uint_32 size)); - -extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr, - png_voidp s1, int value, png_uint_32 size)); - -#if defined(USE_FAR_KEYWORD) /* memory model conversion function */ -extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, - int check)); -#endif /* USE_FAR_KEYWORD */ - -/* Fatal error in PNG image of libpng - can't continue */ -extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, - png_const_charp error)); - -/* The same, but the chunk name is prepended to the error string. */ -extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, - png_const_charp error)); - -/* Non-fatal error in libpng. Can continue, but may have a problem. */ -extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* Non-fatal error in libpng, chunk name is prepended to message. */ -extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* The png_set_ functions are for storing values in the png_info_struct. - * Similarly, the png_get_ calls are used to read values from the - * png_info_struct, either storing the parameters in the passed variables, or - * setting pointers into the png_info_struct where the data is stored. The - * png_get_ functions return a non-zero value if the data was available - * in info_ptr, or return zero and do not change any of the parameters if the - * data was not available. - * - * These functions should be used instead of directly accessing png_info - * to avoid problems with future changes in the size and internal layout of - * png_info_struct. - */ - -/* Returns number of bytes needed to hold a transformed row. */ -extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, -png_infop info_ptr)); - -#ifdef PNG_EASY_ACCESS_SUPPORTED -/* Returns image width in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image height in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image bit_depth. */ -extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image color_type. */ -extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image filter_type. */ -extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image interlace_type. */ -extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image compression_type. */ -extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns image resolution in pixels per meter, from pHYs chunk data. */ -extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -/* Returns pixel aspect ratio, computed from pHYs chunk data. */ -extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp -png_ptr, png_infop info_ptr)); - -#endif /* PNG_EASY_ACCESS_SUPPORTED */ - -#if defined(PNG_READ_bKGD_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p *background)); -#endif /* PNG_READ_bKGD_SUPPORTED */ - -#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED) -extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_16p background)); -#endif /* PNG_READ_bKGD_SUPPORTED || PNG_WRITE_bKGD_SUPPORTED */ - -#if defined(PNG_READ_cHRM_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *white_x, double *white_y, double *red_x, - double *red_y, double *green_x, double *green_y, double *blue_x, - double *blue_y)); -#endif /* PNG_READ_cHRM_SUPPORTED */ - -#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED) -extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, double white_x, double white_y, double red_x, - double red_y, double green_x, double green_y, double blue_x, double blue_y)); -#endif /* PNG_READ_cHRM_SUPPORTED || PNG_WRITE_cHRM_SUPPORTED */ - -#if defined(PNG_READ_gAMA_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double *file_gamma)); -#endif /* PNG_READ_gAMA_SUPPORTED */ - -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) -extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -#endif /* PNG_READ_gAMA_SUPPORTED || PNG_WRITE_gAMA_SUPPORTED */ - -#if defined(PNG_READ_hIST_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p *hist)); -#endif /* PNG_READ_hIST_SUPPORTED */ - -#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED) -extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_16p hist)); -#endif /* PNG_READ_hIST_SUPPORTED || PNG_WRITE_hIST_SUPPORTED */ - -extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, - int *bit_depth, int *color_type, int *interlace_type, - int *compression_type, int *filter_type)); - -extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, int filter_type)); - -#if defined(PNG_READ_oFFs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *offset_x, png_uint_32 *offset_y, - int *unit_type)); -#endif /* PNG_READ_oFFs_SUPPORTED */ - -#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) -extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 offset_x, png_uint_32 offset_y, - int unit_type)); -#endif /* PNG_READ_oFFs_SUPPORTED || PNG_WRITE_oFFs_SUPPORTED */ - -#if defined(PNG_READ_pCAL_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, - int *type, int *nparams, png_charp *units, png_charpp *params)); -#endif /* PNG_READ_pCAL_SUPPORTED */ - -#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) -extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, - int type, int nparams, png_charp units, png_charpp params)); -#endif /* PNG_READ_pCAL_SUPPORTED || PNG_WRITE_pCAL_SUPPORTED */ - -#if defined(PNG_READ_pHYs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -#endif /* PNG_READ_pHYs_SUPPORTED */ - -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) -extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); -#endif /* PNG_READ_pHYs_SUPPORTED || PNG_WRITE_pHYs_SUPPORTED */ - -extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp *palette, int *num_palette)); - -extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_colorp palette, int num_palette)); - -#if defined(PNG_READ_sBIT_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p *sig_bit)); -#endif /* PNG_READ_sBIT_SUPPORTED */ - -#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED) -extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_color_8p sig_bit)); -#endif /* PNG_READ_sBIT_SUPPORTED || PNG_WRITE_sBIT_SUPPORTED */ - -#if defined(PNG_READ_sRGB_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int *intent)); -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED) -extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); -extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, - png_infop info_ptr, int intent)); -#endif /* PNG_READ_sRGB_SUPPORTED || PNG_WRITE_sRGB_SUPPORTED */ - -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) -/* png_get_text also returns the number of text chunks in text_ptr */ -extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp *text_ptr, int *num_text)); -#endif /* PNG_READ_tEXt_SUPPORTED || PNG_READ_zTXt_SUPPORTED */ - -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ - defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) -extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_textp text_ptr, int num_text)); -#endif /* PNG_READ_OR_WRITE_tEXt_OR_zTXt_SUPPORTED */ - -#if defined(PNG_READ_tIME_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep *mod_time)); -#endif /* PNG_READ_tIME_SUPPORTED */ - -#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED) -extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_timep mod_time)); -#endif /* PNG_READ_tIME_SUPPORTED || PNG_WRITE_tIME_SUPPORTED */ - -#if defined(PNG_READ_tRNS_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep *trans, int *num_trans, - png_color_16p *trans_values)); -#endif /* PNG_READ_tRNS_SUPPORTED */ - -#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED) -extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep trans, int num_trans, - png_color_16p trans_values)); -#endif /* PNG_READ_tRNS_SUPPORTED || PNG_WRITE_tRNS_SUPPORTED */ - -/* Define PNG_DEBUG at compile time for debugging information. Higher - * numbers for PNG_DEBUG mean more debugging information. This has - * only been added since version 0.95 so it is not implemented throughout - * libpng yet, but more support will be added as needed. - */ -#if (PNG_DEBUG > 0) -#ifdef PNG_NO_STDIO -#include -#endif -#ifndef PNG_DEBUG_FILE -#define PNG_DEBUG_FILE stderr -#endif /* PNG_DEBUG_FILE */ - -#define png_debug(l,m) if (PNG_DEBUG > l) \ - fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \ - (l==2 ? "\t\t":(l==3 ? "\t\t\t":"")))) -#define png_debug1(l,m,p1) if (PNG_DEBUG > l) \ - fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \ - (l==2 ? "\t\t":(l==3 ? "\t\t\t":""))),p1) -#define png_debug2(l,m,p1,p2) if (PNG_DEBUG > l) \ - fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \ - (l==2 ? "\t\t":(l==3 ? "\t\t\t":""))),p1,p2) -#else -#define png_debug(l, m) -#define png_debug1(l, m, p1) -#define png_debug2(l, m, p1, p2) -#endif /* (PNG_DEBUG > 0) */ - -#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED -/* With these routines we avoid an integer divide, which will be slower on - * most machines. However, it does take more operations than the corresponding - * divide method, so it may be slower on a few RISC systems. There are two - * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. - * - * Note that the rounding factors are NOT supposed to be the same! 128 and - * 32768 are correct for the NODIV code; 127 and 32767 are correct for the - * standard method. - * - * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] - */ - - /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ -# define png_composite(composite, fg, alpha, bg) \ - { png_uint_16 temp = ((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg)*(png_uint_16)(255 - \ - (png_uint_16)(alpha)) + (png_uint_16)128); \ - (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } -# define png_composite_16(composite, fg, alpha, bg) \ - { png_uint_32 temp = ((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535L - \ - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ - (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } - -#else /* standard method using integer division */ - - /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - (png_uint_16)127) / 255) -# define png_composite_16(composite, fg, alpha, bg) \ - (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ - (png_uint_32)32767) / (png_uint_32)65535L) - -#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ - -/* These next functions are used internally in the code. They generally - * shouldn't be used unless you are writing code to add or replace some - * functionality in libpng. More information about most functions can - * be found in the files where the functions are located. - */ - -#if defined(PNG_INTERNAL) - -/* Various modes of operation. Note that after an init, mode is set to - * zero automatically when the structure is created. - */ -#define PNG_BEFORE_IHDR 0x00 -#define PNG_HAVE_IHDR 0x01 -#define PNG_HAVE_PLTE 0x02 -#define PNG_HAVE_IDAT 0x04 -#define PNG_AFTER_IDAT 0x08 -#define PNG_HAVE_IEND 0x10 -#define PNG_HAVE_gAMA 0x20 -#define PNG_HAVE_cHRM 0x40 -#define PNG_HAVE_sRGB 0x80 - -/* push model modes */ -#define PNG_READ_SIG_MODE 0 -#define PNG_READ_CHUNK_MODE 1 -#define PNG_READ_IDAT_MODE 2 -#define PNG_SKIP_MODE 3 -#define PNG_READ_tEXt_MODE 4 -#define PNG_READ_zTXt_MODE 5 -#define PNG_READ_DONE_MODE 6 -#define PNG_ERROR_MODE 7 - -/* flags for the transformations the PNG library does on the image data */ -#define PNG_BGR 0x0001 -#define PNG_INTERLACE 0x0002 -#define PNG_PACK 0x0004 -#define PNG_SHIFT 0x0008 -#define PNG_SWAP_BYTES 0x0010 -#define PNG_INVERT_MONO 0x0020 -#define PNG_DITHER 0x0040 -#define PNG_BACKGROUND 0x0080 -#define PNG_BACKGROUND_EXPAND 0x0100 -#define PNG_RGB_TO_GRAY 0x0200 /* Not currently implemented */ -#define PNG_16_TO_8 0x0400 -#define PNG_RGBA 0x0800 -#define PNG_EXPAND 0x1000 -#define PNG_GAMMA 0x2000 -#define PNG_GRAY_TO_RGB 0x4000 -#define PNG_FILLER 0x8000 -#define PNG_PACKSWAP 0x10000L -#define PNG_SWAP_ALPHA 0x20000L -#define PNG_STRIP_ALPHA 0x40000L -#define PNG_INVERT_ALPHA 0x80000L -#define PNG_USER_TRANSFORM 0x100000L - -/* flags for png_create_struct */ -#define PNG_STRUCT_PNG 0x0001 -#define PNG_STRUCT_INFO 0x0002 - -/* Scaling factor for filter heuristic weighting calculations */ -#define PNG_WEIGHT_SHIFT 8 -#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) -#define PNG_COST_SHIFT 3 -#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) - -/* flags for the png_ptr->flags rather than declaring a byte for each one */ -#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 -#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 -#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 -#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 -#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 -#define PNG_FLAG_ZLIB_FINISHED 0x0020 -#define PNG_FLAG_ROW_INIT 0x0040 -#define PNG_FLAG_FILLER_AFTER 0x0080 -#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 -#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 -#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 -#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 -#define PNG_FLAG_FREE_PALETTE 0x1000 -#define PNG_FLAG_FREE_TRANS 0x2000 -#define PNG_FLAG_FREE_HIST 0x4000 -#define PNG_FLAG_HAVE_CHUNK_HEADER 0x8000L -#define PNG_FLAG_WROTE_tIME 0x10000L -#define PNG_FLAG_BACKGROUND_IS_GRAY 0x20000L - -#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ - PNG_FLAG_CRC_ANCILLARY_NOWARN) - -#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ - PNG_FLAG_CRC_CRITICAL_IGNORE) - -#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ - PNG_FLAG_CRC_CRITICAL_MASK) - -/* save typing and make code easier to understand */ -#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ - abs((int)((c1).green) - (int)((c2).green)) + \ - abs((int)((c1).blue) - (int)((c2).blue))) - -/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) -/* place to hold the signature string for a PNG file. */ -extern png_byte FARDATA png_sig[8]; - -/* Constant strings for known chunk types. If you need to add a chunk, - * add a string holding the name here. See png.c for more details. We - * can't selectively include these, since we still check for chunk in the - * wrong locations with these labels. - */ -extern png_byte FARDATA png_IHDR[5]; -extern png_byte FARDATA png_IDAT[5]; -extern png_byte FARDATA png_IEND[5]; -extern png_byte FARDATA png_PLTE[5]; -extern png_byte FARDATA png_bKGD[5]; -extern png_byte FARDATA png_cHRM[5]; -extern png_byte FARDATA png_gAMA[5]; -extern png_byte FARDATA png_hIST[5]; -extern png_byte FARDATA png_oFFs[5]; -extern png_byte FARDATA png_pCAL[5]; -extern png_byte FARDATA png_pHYs[5]; -extern png_byte FARDATA png_sBIT[5]; -extern png_byte FARDATA png_sRGB[5]; -extern png_byte FARDATA png_tEXt[5]; -extern png_byte FARDATA png_tIME[5]; -extern png_byte FARDATA png_tRNS[5]; -extern png_byte FARDATA png_zTXt[5]; - -#endif /* PNG_NO_EXTERN */ - -/* Inline macros to do direct reads of bytes from the input buffer. These - * require that you are using an architecture that uses PNG byte ordering - * (MSB first) and supports unaligned data storage. I think that PowerPC - * in big-endian mode and 680x0 are the only ones that will support this. - * The x86 line of processors definitely do not. The png_get_int_32() - * routine also assumes we are using two's complement format for negative - * values, which is almost certainly true. - */ -#if defined(PNG_READ_BIG_ENDIAN_SUPPORTED) -#if defined(PNG_READ_pCAL_SUPPORTED) -#define png_get_int_32(buf) ( *((png_int_32p) (buf))) -#endif /* PNG_READ_pCAL_SUPPORTED */ -#define png_get_uint_32(buf) ( *((png_uint_32p) (buf))) -#define png_get_uint_16(buf) ( *((png_uint_16p) (buf))) -#else -#if defined(PNG_READ_pCAL_SUPPORTED) -PNG_EXTERN png_int_32 png_get_int_32 PNGARG((png_bytep buf)); -#endif /* PNG_READ_pCAL_SUPPORTED */ -PNG_EXTERN png_uint_32 png_get_uint_32 PNGARG((png_bytep buf)); -PNG_EXTERN png_uint_16 png_get_uint_16 PNGARG((png_bytep buf)); -#endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */ - -/* Initialize png_ptr struct for writing, and allocate any other memory. - * (old interface - NOT DLL EXPORTED). - */ -extern void png_write_init PNGARG((png_structp png_ptr)); - -/* allocate memory for an internal libpng struct */ -PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); - -/* free memory from internal libpng struct */ -PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); - -PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr - malloc_fn)); -PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, - png_free_ptr free_fn)); - -/* free any memory that info_ptr points to and reset struct. */ -PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* Function to allocate memory for zlib. */ -PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); - -/* function to free memory for zlib */ -PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); - -/* reset the CRC variable */ -PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); - -/* Write the "data" buffer to whatever output you are using. */ -PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -/* Read data from whatever input you are using into the "data" buffer */ -PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -/* read bytes into buf, and update png_ptr->crc */ -PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, - png_size_t length)); - -/* read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ -PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); - -/* read the CRC from the file and compare it to the libpng calculated CRC */ -PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); - -/* Calculate the CRC over a section of data. Note that we are only - * passing a maximum of 64K on systems that have this as a memory limit, - * since this is the maximum buffer size we can specify. - */ -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, - png_size_t length)); - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); -#endif - -/* Place a 32-bit number into a buffer in PNG byte order (big-endian). - * The only currently known PNG chunk that uses signed numbers is - * the ancillary extension chunk, pCAL. - */ -PNG_EXTERN void png_save_uint_32 PNGARG((png_bytep buf, png_uint_32 i)); - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -PNG_EXTERN void png_save_int_32 PNGARG((png_bytep buf, png_int_32 i)); -#endif - -/* Place a 16 bit number into a buffer in PNG byte order. - * The parameter is declared unsigned int, not png_uint_16, - * just to avoid potential problems on pre-ANSI C compilers. - */ -PNG_EXTERN void png_save_uint_16 PNGARG((png_bytep buf, unsigned int i)); - -/* simple function to write the signature */ -PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr)); - -/* write various chunks */ - -/* Write the IHDR chunk, and update the png_struct with the necessary - * information. - */ -PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, - png_uint_32 height, - int bit_depth, int color_type, int compression_type, int filter_type, - int interlace_type)); - -PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, - png_uint_32 num_pal)); - -PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, - png_size_t length)); - -PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); - -#if defined(PNG_WRITE_gAMA_SUPPORTED) -PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); -#endif - -#if defined(PNG_WRITE_sBIT_SUPPORTED) -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, - int color_type)); -#endif - -#if defined(PNG_WRITE_cHRM_SUPPORTED) -PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, - double white_x, double white_y, - double red_x, double red_y, double green_x, double green_y, - double blue_x, double blue_y)); -#endif - -#if defined(PNG_WRITE_sRGB_SUPPORTED) -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); -#endif - -#if defined(PNG_WRITE_tRNS_SUPPORTED) -PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, - png_color_16p values, int number, int color_type)); -#endif - -#if defined(PNG_WRITE_bKGD_SUPPORTED) -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_color_16p values, int color_type)); -#endif - -#if defined(PNG_WRITE_hIST_SUPPORTED) -PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, - int num_hist)); -#endif - -#if defined(PNG_WRITE_tEXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) || \ - defined(PNG_WRITE_pCAL_SUPPORTED) -PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, - png_charp key, png_charpp new_key)); -#endif - -#if defined(PNG_WRITE_tEXt_SUPPORTED) -PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len)); -#endif - -#if defined(PNG_WRITE_zTXt_SUPPORTED) -PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, - png_charp text, png_size_t text_len, int compression)); -#endif - -#if defined(PNG_WRITE_oFFs_SUPPORTED) -PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, - png_uint_32 x_offset, png_uint_32 y_offset, int unit_type)); -#endif - -#if defined(PNG_WRITE_pCAL_SUPPORTED) -PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, - png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params)); -#endif - -#if defined(PNG_WRITE_pHYs_SUPPORTED) -PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, - png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, - int unit_type)); -#endif - -#if defined(PNG_WRITE_tIME_SUPPORTED) -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_timep mod_time)); -#endif - -/* Called when finished processing a row of data */ -PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); - -/* Internal use only. Called before first row of data */ -PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); - -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr)); -#endif - -/* combine a row of data, dealing with alpha, etc. if requested */ -PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, - int mask)); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) -/* expand an interlaced row */ -PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass, png_uint_32 transformations)); -#endif - -#if defined(PNG_WRITE_INTERLACING_SUPPORTED) -/* grab pixels out of a row for an interlaced pass */ -PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, - png_bytep row, int pass)); -#endif - -/* unfilter a row */ -PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, - png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); - -/* Choose the best filter to use and filter the row data */ -PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, - png_row_infop row_info)); - -/* Write out the filtered row. */ -PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, - png_bytep filtered_row)); -/* finish a row while reading, dealing with interlacing passes, etc. */ -PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); - -/* initialize the row buffers, etc. */ -PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); -/* optional call to update the users info structure */ -PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); - -/* these are the functions that do the transformations */ -#if defined(PNG_READ_FILLER_SUPPORTED) -PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 filler, png_uint_32 flags)); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ - defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 flags)); -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) -PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -PNG_EXTERN void png_do_rgb_to_gray PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) -PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p sig_bits)); -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, - png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup)); - -# if defined(PNG_CORRECT_PALETTE_SUPPORTED) -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, - png_colorp palette, int num_palette)); -# endif -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(PNG_WRITE_PACK_SUPPORTED) -PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, - png_bytep row, png_uint_32 bit_depth)); -#endif - -#if defined(PNG_WRITE_SHIFT_SUPPORTED) -PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, - png_color_8p bit_depth)); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, - png_color_16p trans_values, png_color_16p background, - png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift)); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift)); -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, - png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); -PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, - png_bytep row, png_color_16p trans_value)); -#endif - -/* The following decodes the appropriate chunks, and does error correction, - * then calls the appropriate callback for the chunk if it is valid. - */ - -/* decode the IHDR chunk */ -PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); - -#if defined(PNG_READ_gAMA_SUPPORTED) -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sBIT_SUPPORTED) -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_bKGD_SUPPORTED) -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_oFFs_SUPPORTED) -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); - -PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, - png_bytep chunk_name)); - -/* handle the transformations for reading and writing */ -PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); - -PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, - png_uint_32 length)); -PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); -PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t buffer_length)); -PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); -PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); -PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, - png_infop info_ptr)); -PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); -#if defined(PNG_READ_tEXt_SUPPORTED) -PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) -PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)); -PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, - png_infop info_ptr)); -#endif - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - -#endif /* PNG_INTERNAL */ - -/* -#ifdef __cplusplus -} -#endif -*/ - -/* do not put anything past this line */ -#endif /* _PNG_H */ - + +/* png.h - header file for PNG reference library + * + * libpng version 1.5.7 - December 15, 2011 + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license (See LICENSE, below) + * + * Authors and maintainers: + * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat + * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger + * libpng versions 0.97, January 1998, through 1.5.7 - December 15, 2011: Glenn + * See also "Contributing Authors", below. + * + * Note about libpng version numbers: + * + * Due to various miscommunications, unforeseen code incompatibilities + * and occasional factors outside the authors' control, version numbering + * on the library has not always been consistent and straightforward. + * The following table summarizes matters since version 0.89c, which was + * the first widely used release: + * + * source png.h png.h shared-lib + * version string int version + * ------- ------ ----- ---------- + * 0.89c "1.0 beta 3" 0.89 89 1.0.89 + * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] + * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] + * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] + * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] + * 0.97c 0.97 97 2.0.97 + * 0.98 0.98 98 2.0.98 + * 0.99 0.99 98 2.0.99 + * 0.99a-m 0.99 99 2.0.99 + * 1.00 1.00 100 2.1.0 [100 should be 10000] + * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] + * 1.0.1 png.h string is 10001 2.1.0 + * 1.0.1a-e identical to the 10002 from here on, the shared library + * 1.0.2 source version) 10002 is 2.V where V is the source code + * 1.0.2a-b 10003 version, except as noted. + * 1.0.3 10003 + * 1.0.3a-d 10004 + * 1.0.4 10004 + * 1.0.4a-f 10005 + * 1.0.5 (+ 2 patches) 10005 + * 1.0.5a-d 10006 + * 1.0.5e-r 10100 (not source compatible) + * 1.0.5s-v 10006 (not binary compatible) + * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) + * 1.0.6d-f 10007 (still binary incompatible) + * 1.0.6g 10007 + * 1.0.6h 10007 10.6h (testing xy.z so-numbering) + * 1.0.6i 10007 10.6i + * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) + * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) + * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) + * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) + * 1.0.7 1 10007 (still compatible) + * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 + * 1.0.8rc1 1 10008 2.1.0.8rc1 + * 1.0.8 1 10008 2.1.0.8 + * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 + * 1.0.9rc1 1 10009 2.1.0.9rc1 + * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 + * 1.0.9rc2 1 10009 2.1.0.9rc2 + * 1.0.9 1 10009 2.1.0.9 + * 1.0.10beta1 1 10010 2.1.0.10beta1 + * 1.0.10rc1 1 10010 2.1.0.10rc1 + * 1.0.10 1 10010 2.1.0.10 + * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 + * 1.0.11rc1 1 10011 2.1.0.11rc1 + * 1.0.11 1 10011 2.1.0.11 + * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 + * 1.0.12rc1 2 10012 2.1.0.12rc1 + * 1.0.12 2 10012 2.1.0.12 + * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) + * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 + * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 + * 1.2.0rc1 3 10200 3.1.2.0rc1 + * 1.2.0 3 10200 3.1.2.0 + * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 + * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 + * 1.2.1 3 10201 3.1.2.1 + * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 + * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 + * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 + * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 + * 1.0.13 10 10013 10.so.0.1.0.13 + * 1.2.2 12 10202 12.so.0.1.2.2 + * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 + * 1.2.3 12 10203 12.so.0.1.2.3 + * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 + * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 + * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 + * 1.0.14 10 10014 10.so.0.1.0.14 + * 1.2.4 13 10204 12.so.0.1.2.4 + * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 + * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 + * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 + * 1.0.15 10 10015 10.so.0.1.0.15 + * 1.2.5 13 10205 12.so.0.1.2.5 + * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 + * 1.0.16 10 10016 10.so.0.1.0.16 + * 1.2.6 13 10206 12.so.0.1.2.6 + * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 + * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 + * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 + * 1.0.17 10 10017 12.so.0.1.0.17 + * 1.2.7 13 10207 12.so.0.1.2.7 + * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 + * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 + * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 + * 1.0.18 10 10018 12.so.0.1.0.18 + * 1.2.8 13 10208 12.so.0.1.2.8 + * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 + * 1.2.9beta4-11 13 10209 12.so.0.9[.0] + * 1.2.9rc1 13 10209 12.so.0.9[.0] + * 1.2.9 13 10209 12.so.0.9[.0] + * 1.2.10beta1-7 13 10210 12.so.0.10[.0] + * 1.2.10rc1-2 13 10210 12.so.0.10[.0] + * 1.2.10 13 10210 12.so.0.10[.0] + * 1.4.0beta1-5 14 10400 14.so.0.0[.0] + * 1.2.11beta1-4 13 10211 12.so.0.11[.0] + * 1.4.0beta7-8 14 10400 14.so.0.0[.0] + * 1.2.11 13 10211 12.so.0.11[.0] + * 1.2.12 13 10212 12.so.0.12[.0] + * 1.4.0beta9-14 14 10400 14.so.0.0[.0] + * 1.2.13 13 10213 12.so.0.13[.0] + * 1.4.0beta15-36 14 10400 14.so.0.0[.0] + * 1.4.0beta37-87 14 10400 14.so.14.0[.0] + * 1.4.0rc01 14 10400 14.so.14.0[.0] + * 1.4.0beta88-109 14 10400 14.so.14.0[.0] + * 1.4.0rc02-08 14 10400 14.so.14.0[.0] + * 1.4.0 14 10400 14.so.14.0[.0] + * 1.4.1beta01-03 14 10401 14.so.14.1[.0] + * 1.4.1rc01 14 10401 14.so.14.1[.0] + * 1.4.1beta04-12 14 10401 14.so.14.1[.0] + * 1.4.1 14 10401 14.so.14.1[.0] + * 1.4.2 14 10402 14.so.14.2[.0] + * 1.4.3 14 10403 14.so.14.3[.0] + * 1.4.4 14 10404 14.so.14.4[.0] + * 1.5.0beta01-58 15 10500 15.so.15.0[.0] + * 1.5.0rc01-07 15 10500 15.so.15.0[.0] + * 1.5.0 15 10500 15.so.15.0[.0] + * 1.5.1beta01-11 15 10501 15.so.15.1[.0] + * 1.5.1rc01-02 15 10501 15.so.15.1[.0] + * 1.5.1 15 10501 15.so.15.1[.0] + * 1.5.2beta01-03 15 10502 15.so.15.2[.0] + * 1.5.2rc01-03 15 10502 15.so.15.2[.0] + * 1.5.2 15 10502 15.so.15.2[.0] + * 1.5.3beta01-10 15 10503 15.so.15.3[.0] + * 1.5.3rc01-02 15 10503 15.so.15.3[.0] + * 1.5.3beta11 15 10503 15.so.15.3[.0] + * 1.5.3 [omitted] + * 1.5.4beta01-08 15 10504 15.so.15.4[.0] + * 1.5.4rc01 15 10504 15.so.15.4[.0] + * 1.5.4 15 10504 15.so.15.4[.0] + * 1.5.5beta01-08 15 10505 15.so.15.5[.0] + * 1.5.5rc01 15 10505 15.so.15.5[.0] + * 1.5.5 15 10505 15.so.15.5[.0] + * 1.5.6beta01-07 15 10506 15.so.15.6[.0] + * 1.5.6rc01-03 15 10506 15.so.15.6[.0] + * 1.5.6 15 10506 15.so.15.6[.0] + * 1.5.7beta01-05 15 10507 15.so.15.7[.0] + * 1.5.7rc01-03 15 10507 15.so.15.7[.0] + * 1.5.7 15 10507 15.so.15.7[.0] + * + * Henceforth the source version will match the shared-library major + * and minor numbers; the shared-library major version number will be + * used for changes in backward compatibility, as it is intended. The + * PNG_LIBPNG_VER macro, which is not used within libpng but is available + * for applications, is an unsigned integer of the form xyyzz corresponding + * to the source version x.y.z (leading zeros in y and z). Beta versions + * were given the previous public release number plus a letter, until + * version 1.0.6j; from then on they were given the upcoming public + * release number plus "betaNN" or "rcN". + * + * Binary incompatibility exists only when applications make direct access + * to the info_ptr or png_ptr members through png.h, and the compiled + * application is loaded with a different version of the library. + * + * DLLNUM will change each time there are forward or backward changes + * in binary compatibility (e.g., when a new feature is added). + * + * See libpng-manual.txt or libpng.3 for more information. The PNG + * specification is available as a W3C Recommendation and as an ISO + * Specification, +# endif + + /* Need the time information for converting tIME chunks, it + * defines struct tm: + */ +# ifdef PNG_CONVERT_tIME_SUPPORTED + /* "time.h" functions are not supported on all operating systems */ +# include +# endif +# endif + +/* Machine specific configuration. */ +# include "pngconf.h" +#endif + +/* + * Added at libpng-1.2.8 + * + * Ref MSDN: Private as priority over Special + * VS_FF_PRIVATEBUILD File *was not* built using standard release + * procedures. If this value is given, the StringFileInfo block must + * contain a PrivateBuild string. + * + * VS_FF_SPECIALBUILD File *was* built by the original company using + * standard release procedures but is a variation of the standard + * file of the same version number. If this value is given, the + * StringFileInfo block must contain a SpecialBuild string. + */ + +#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ +# define PNG_LIBPNG_BUILD_TYPE \ + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) +#else +# ifdef PNG_LIBPNG_SPECIALBUILD +# define PNG_LIBPNG_BUILD_TYPE \ + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) +# else +# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) +# endif +#endif + +#ifndef PNG_VERSION_INFO_ONLY + +/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* Version information for C files, stored in png.c. This had better match + * the version above. + */ +#define png_libpng_ver png_get_header_ver(NULL) + +/* This file is arranged in several sections: + * + * 1. Any configuration options that can be specified by for the application + * code when it is built. (Build time configuration is in pnglibconf.h) + * 2. Type definitions (base types are defined in pngconf.h), structure + * definitions. + * 3. Exported library functions. + * + * The library source code has additional files (principally pngpriv.h) that + * allow configuration of the library. + */ +/* Section 1: run time configuration + * See pnglibconf.h for build time configuration + * + * Run time configuration allows the application to choose between + * implementations of certain arithmetic APIs. The default is set + * at build time and recorded in pnglibconf.h, but it is safe to + * override these (and only these) settings. Note that this won't + * change what the library does, only application code, and the + * settings can (and probably should) be made on a per-file basis + * by setting the #defines before including png.h + * + * Use macros to read integers from PNG data or use the exported + * functions? + * PNG_USE_READ_MACROS: use the macros (see below) Note that + * the macros evaluate their argument multiple times. + * PNG_NO_USE_READ_MACROS: call the relevant library function. + * + * Use the alternative algorithm for compositing alpha samples that + * does not use division? + * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' + * algorithm. + * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. + * + * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is + * false? + * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error + * APIs to png_warning. + * Otherwise the calls are mapped to png_error. + */ + +/* Section 2: type definitions, including structures and compile time + * constants. + * See pngconf.h for base types that vary by machine/system + */ + +/* This triggers a compiler error in png.c, if png.c and png.h + * do not agree upon the version number. + */ +typedef char* png_libpng_version_1_5_7; + +/* Three color definitions. The order of the red, green, and blue, (and the + * exact size) is not important, although the size of the fields need to + * be png_byte or png_uint_16 (as defined below). + */ +typedef struct png_color_struct +{ + png_byte red; + png_byte green; + png_byte blue; +} png_color; +typedef png_color FAR * png_colorp; +typedef PNG_CONST png_color FAR * png_const_colorp; +typedef png_color FAR * FAR * png_colorpp; + +typedef struct png_color_16_struct +{ + png_byte index; /* used for palette files */ + png_uint_16 red; /* for use in red green blue files */ + png_uint_16 green; + png_uint_16 blue; + png_uint_16 gray; /* for use in grayscale files */ +} png_color_16; +typedef png_color_16 FAR * png_color_16p; +typedef PNG_CONST png_color_16 FAR * png_const_color_16p; +typedef png_color_16 FAR * FAR * png_color_16pp; + +typedef struct png_color_8_struct +{ + png_byte red; /* for use in red green blue files */ + png_byte green; + png_byte blue; + png_byte gray; /* for use in grayscale files */ + png_byte alpha; /* for alpha channel files */ +} png_color_8; +typedef png_color_8 FAR * png_color_8p; +typedef PNG_CONST png_color_8 FAR * png_const_color_8p; +typedef png_color_8 FAR * FAR * png_color_8pp; + +/* + * The following two structures are used for the in-core representation + * of sPLT chunks. + */ +typedef struct png_sPLT_entry_struct +{ + png_uint_16 red; + png_uint_16 green; + png_uint_16 blue; + png_uint_16 alpha; + png_uint_16 frequency; +} png_sPLT_entry; +typedef png_sPLT_entry FAR * png_sPLT_entryp; +typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; +typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; + +/* When the depth of the sPLT palette is 8 bits, the color and alpha samples + * occupy the LSB of their respective members, and the MSB of each member + * is zero-filled. The frequency member always occupies the full 16 bits. + */ + +typedef struct png_sPLT_struct +{ + png_charp name; /* palette name */ + png_byte depth; /* depth of palette samples */ + png_sPLT_entryp entries; /* palette entries */ + png_int_32 nentries; /* number of palette entries */ +} png_sPLT_t; +typedef png_sPLT_t FAR * png_sPLT_tp; +typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; +typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; + +#ifdef PNG_TEXT_SUPPORTED +/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, + * and whether that contents is compressed or not. The "key" field + * points to a regular zero-terminated C string. The "text" fields can be a + * regular C string, an empty string, or a NULL pointer. + * However, the structure returned by png_get_text() will always contain + * the "text" field as a regular zero-terminated C string (possibly + * empty), never a NULL pointer, so it can be safely used in printf() and + * other string-handling functions. Note that the "itxt_length", "lang", and + * "lang_key" members of the structure only exist when the library is built + * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by + * default without iTXt support. Also note that when iTXt *is* supported, + * the "lang" and "lang_key" fields contain NULL pointers when the + * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or + * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the + * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag" + * which is always 0 or 1, or its "compression method" which is always 0. + */ +typedef struct png_text_struct +{ + int compression; /* compression value: + -1: tEXt, none + 0: zTXt, deflate + 1: iTXt, none + 2: iTXt, deflate */ + png_charp key; /* keyword, 1-79 character description of "text" */ + png_charp text; /* comment, may be an empty string (ie "") + or a NULL pointer */ + png_size_t text_length; /* length of the text string */ + png_size_t itxt_length; /* length of the itxt string */ + png_charp lang; /* language code, 0-79 characters + or a NULL pointer */ + png_charp lang_key; /* keyword translated UTF-8 string, 0 or more + chars or a NULL pointer */ +} png_text; +typedef png_text FAR * png_textp; +typedef PNG_CONST png_text FAR * png_const_textp; +typedef png_text FAR * FAR * png_textpp; +#endif + +/* Supported compression types for text in PNG files (tEXt, and zTXt). + * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ +#define PNG_TEXT_COMPRESSION_NONE_WR -3 +#define PNG_TEXT_COMPRESSION_zTXt_WR -2 +#define PNG_TEXT_COMPRESSION_NONE -1 +#define PNG_TEXT_COMPRESSION_zTXt 0 +#define PNG_ITXT_COMPRESSION_NONE 1 +#define PNG_ITXT_COMPRESSION_zTXt 2 +#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ + +/* png_time is a way to hold the time in an machine independent way. + * Two conversions are provided, both from time_t and struct tm. There + * is no portable way to convert to either of these structures, as far + * as I know. If you know of a portable way, send it to me. As a side + * note - PNG has always been Year 2000 compliant! + */ +typedef struct png_time_struct +{ + png_uint_16 year; /* full year, as in, 1995 */ + png_byte month; /* month of year, 1 - 12 */ + png_byte day; /* day of month, 1 - 31 */ + png_byte hour; /* hour of day, 0 - 23 */ + png_byte minute; /* minute of hour, 0 - 59 */ + png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ +} png_time; +typedef png_time FAR * png_timep; +typedef PNG_CONST png_time FAR * png_const_timep; +typedef png_time FAR * FAR * png_timepp; + +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +/* png_unknown_chunk is a structure to hold queued chunks for which there is + * no specific support. The idea is that we can use this to queue + * up private chunks for output even though the library doesn't actually + * know about their semantics. + */ +typedef struct png_unknown_chunk_t +{ + png_byte name[5]; + png_byte *data; + png_size_t size; + + /* libpng-using applications should NOT directly modify this byte. */ + png_byte location; /* mode of operation at read time */ +} + + +png_unknown_chunk; +typedef png_unknown_chunk FAR * png_unknown_chunkp; +typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; +typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; +#endif + +/* Values for the unknown chunk location byte */ + +#define PNG_HAVE_IHDR 0x01 +#define PNG_HAVE_PLTE 0x02 +#define PNG_AFTER_IDAT 0x08 + +/* The complete definition of png_info has, as of libpng-1.5.0, + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_info_def png_info; +typedef png_info FAR * png_infop; +typedef PNG_CONST png_info FAR * png_const_infop; +typedef png_info FAR * FAR * png_infopp; + +/* Maximum positive integer used in PNG is (2^31)-1 */ +#define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) +#define PNG_UINT_32_MAX ((png_uint_32)(-1)) +#define PNG_SIZE_MAX ((png_size_t)(-1)) + +/* These are constants for fixed point values encoded in the + * PNG specification manner (x100000) + */ +#define PNG_FP_1 100000 +#define PNG_FP_HALF 50000 +#define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) +#define PNG_FP_MIN (-PNG_FP_MAX) + +/* These describe the color_type field in png_info. */ +/* color type masks */ +#define PNG_COLOR_MASK_PALETTE 1 +#define PNG_COLOR_MASK_COLOR 2 +#define PNG_COLOR_MASK_ALPHA 4 + +/* color types. Note that not all combinations are legal */ +#define PNG_COLOR_TYPE_GRAY 0 +#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) +#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) +#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) +#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) +/* aliases */ +#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA +#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA + +/* This is for compression type. PNG 1.0-1.2 only define the single type. */ +#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ +#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE + +/* This is for filter type. PNG 1.0-1.2 only define the single type. */ +#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ +#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ +#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE + +/* These are for the interlacing type. These values should NOT be changed. */ +#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ +#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ +#define PNG_INTERLACE_LAST 2 /* Not a valid value */ + +/* These are for the oFFs chunk. These values should NOT be changed. */ +#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ +#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ +#define PNG_OFFSET_LAST 2 /* Not a valid value */ + +/* These are for the pCAL chunk. These values should NOT be changed. */ +#define PNG_EQUATION_LINEAR 0 /* Linear transformation */ +#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ +#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ +#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ +#define PNG_EQUATION_LAST 4 /* Not a valid value */ + +/* These are for the sCAL chunk. These values should NOT be changed. */ +#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ +#define PNG_SCALE_METER 1 /* meters per pixel */ +#define PNG_SCALE_RADIAN 2 /* radians per pixel */ +#define PNG_SCALE_LAST 3 /* Not a valid value */ + +/* These are for the pHYs chunk. These values should NOT be changed. */ +#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ +#define PNG_RESOLUTION_METER 1 /* pixels/meter */ +#define PNG_RESOLUTION_LAST 2 /* Not a valid value */ + +/* These are for the sRGB chunk. These values should NOT be changed. */ +#define PNG_sRGB_INTENT_PERCEPTUAL 0 +#define PNG_sRGB_INTENT_RELATIVE 1 +#define PNG_sRGB_INTENT_SATURATION 2 +#define PNG_sRGB_INTENT_ABSOLUTE 3 +#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ + +/* This is for text chunks */ +#define PNG_KEYWORD_MAX_LENGTH 79 + +/* Maximum number of entries in PLTE/sPLT/tRNS arrays */ +#define PNG_MAX_PALETTE_LENGTH 256 + +/* These determine if an ancillary chunk's data has been successfully read + * from the PNG header, or if the application has filled in the corresponding + * data in the info_struct to be written into the output file. The values + * of the PNG_INFO_ defines should NOT be changed. + */ +#define PNG_INFO_gAMA 0x0001 +#define PNG_INFO_sBIT 0x0002 +#define PNG_INFO_cHRM 0x0004 +#define PNG_INFO_PLTE 0x0008 +#define PNG_INFO_tRNS 0x0010 +#define PNG_INFO_bKGD 0x0020 +#define PNG_INFO_hIST 0x0040 +#define PNG_INFO_pHYs 0x0080 +#define PNG_INFO_oFFs 0x0100 +#define PNG_INFO_tIME 0x0200 +#define PNG_INFO_pCAL 0x0400 +#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ +#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ +#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ +#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ +#define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ + +/* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using + * the routines for other purposes. + */ +typedef struct png_row_info_struct +{ + png_uint_32 width; /* width of row */ + png_size_t rowbytes; /* number of bytes in row */ + png_byte color_type; /* color type of row */ + png_byte bit_depth; /* bit depth of row */ + png_byte channels; /* number of channels (1, 2, 3, or 4) */ + png_byte pixel_depth; /* bits per pixel (depth * channels) */ +} png_row_info; + +typedef png_row_info FAR * png_row_infop; +typedef png_row_info FAR * FAR * png_row_infopp; + +/* The complete definition of png_struct has, as of libpng-1.5.0, + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_struct_def png_struct; +typedef PNG_CONST png_struct FAR * png_const_structp; +typedef png_struct FAR * png_structp; + +/* These are the function types for the I/O functions and for the functions + * that allow the user to override the default I/O functions with his or her + * own. The png_error_ptr type should match that of user-supplied warning + * and error functions, while the png_rw_ptr type should match that of the + * user read/write data functions. Note that the 'write' function must not + * modify the buffer it is passed. The 'read' function, on the other hand, is + * expected to return the read data in the buffer. + */ +typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); +typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); +typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); +typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, + int)); +typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, + int)); + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); +typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); + +/* The following callback receives png_uint_32 row_number, int pass for the + * png_bytep data of the row. When transforming an interlaced image the + * row number is the row number within the sub-image of the interlace pass, so + * the value will increase to the height of the sub-image (not the full image) + * then reset to 0 for the next pass. + * + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to + * find the output pixel (x,y) given an interlaced sub-image pixel + * (row,col,pass). (See below for these macros.) + */ +typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, + png_uint_32, int)); +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, + png_bytep)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, + png_unknown_chunkp)); +#endif +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); +#endif + +#ifdef PNG_SETJMP_SUPPORTED +/* This must match the function definition in , and the application + * must include this before png.h to obtain the definition of jmp_buf. The + * function is required to be PNG_NORETURN, but this is not checked. If the + * function does return the application will crash via an abort() or similar + * system level call. + * + * If you get a warning here while building the library you may need to make + * changes to ensure that pnglibconf.h records the calling convention used by + * your compiler. This may be very difficult - try using a different compiler + * to build the library! + */ +PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); +#endif + +/* Transform masks for the high-level interface */ +#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ +#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ +#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ +#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ +#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ +#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ +#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ +#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ +#define PNG_TRANSFORM_BGR 0x0080 /* read and write */ +#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ +#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ +#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ +#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ +/* Added to libpng-1.2.34 */ +#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER +#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ +/* Added to libpng-1.4.0 */ +#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ +/* Added to libpng-1.5.4 */ +#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ +#define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ + +/* Flags for MNG supported features */ +#define PNG_FLAG_MNG_EMPTY_PLTE 0x01 +#define PNG_FLAG_MNG_FILTER_64 0x04 +#define PNG_ALL_MNG_FEATURES 0x05 + +/* NOTE: prior to 1.5 these functions had no 'API' style declaration, + * this allowed the zlib default functions to be used on Windows + * platforms. In 1.5 the zlib default malloc (which just calls malloc and + * ignores the first argument) should be completely compatible with the + * following. + */ +typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, + png_alloc_size_t)); +typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); + +typedef png_struct FAR * FAR * png_structpp; + +/* Section 3: exported functions + * Here are the function definitions most commonly used. This is not + * the place to find out how to use libpng. See libpng-manual.txt for the + * full explanation, see example.c for the summary. This just provides + * a simple one line description of the use of each function. + * + * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in + * pngconf.h and in the *.dfn files in the scripts directory. + * + * PNG_EXPORT(ordinal, type, name, (args)); + * + * ordinal: ordinal that is used while building + * *.def files. The ordinal value is only + * relevant when preprocessing png.h with + * the *.dfn files for building symbol table + * entries, and are removed by pngconf.h. + * type: return type of the function + * name: function name + * args: function arguments, with types + * + * When we wish to append attributes to a function prototype we use + * the PNG_EXPORTA() macro instead. + * + * PNG_EXPORTA(ordinal, type, name, (args), attributes); + * + * ordinal, type, name, and args: same as in PNG_EXPORT(). + * attributes: function attributes + */ + +/* Returns the version number of the library */ +PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); + +/* Tell lib we have already handled the first magic bytes. + * Handling more than 8 bytes from the beginning of the file is an error. + */ +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); + +/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a + * PNG file. Returns zero if the supplied bytes match the 8-byte PNG + * signature, and non-zero otherwise. Having num_to_check == 0 or + * start > 7 will always fail (ie return non-zero). + */ +PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, + png_size_t num_to_check)); + +/* Simple signature checking function. This is the same as calling + * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). + */ +#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) + +/* Allocate and initialize png_ptr struct for reading, and any other memory. */ +PNG_EXPORTA(4, png_structp, png_create_read_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn), + PNG_ALLOCATED); + +/* Allocate and initialize png_ptr struct for writing, and any other memory */ +PNG_EXPORTA(5, png_structp, png_create_write_struct, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn), + PNG_ALLOCATED); + +PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, + (png_const_structp png_ptr)); + +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, + png_size_t size)); + +/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp + * match up. + */ +#ifdef PNG_SETJMP_SUPPORTED +/* This function returns the jmp_buf built in to *png_ptr. It must be + * supplied with an appropriate 'longjmp' function to use on that jmp_buf + * unless the default error function is overridden in which case NULL is + * acceptable. The size of the jmp_buf is checked against the actual size + * allocated by the library - the call will return NULL on a mismatch + * indicating an ABI mismatch. + */ +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, + png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); +# define png_jmpbuf(png_ptr) \ + (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) +#else +# define png_jmpbuf(png_ptr) \ + (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) +#endif +/* This function should be used by libpng applications in place of + * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it + * will use it; otherwise it will call PNG_ABORT(). This function was + * added in libpng-1.5.0. + */ +PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), + PNG_NORETURN); + +#ifdef PNG_READ_SUPPORTED +/* Reset the compression stream */ +PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); +#endif + +/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ +#ifdef PNG_USER_MEM_SUPPORTED +PNG_EXPORTA(11, png_structp, png_create_read_struct_2, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, + png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), + PNG_ALLOCATED); +PNG_EXPORTA(12, png_structp, png_create_write_struct_2, + (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, + png_error_ptr warn_fn, + png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), + PNG_ALLOCATED); +#endif + +/* Write the PNG file signature. */ +PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); + +/* Write a PNG chunk - size, type, (optional) data, CRC. */ +PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep + chunk_name, png_const_bytep data, png_size_t length)); + +/* Write the start of a PNG chunk - length and chunk name. */ +PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, + png_const_bytep chunk_name, png_uint_32 length)); + +/* Write the data of a PNG chunk started with png_write_chunk_start(). */ +PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, + png_const_bytep data, png_size_t length)); + +/* Finish a chunk started with png_write_chunk_start() (includes CRC). */ +PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); + +/* Allocate and initialize the info structure */ +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), + PNG_ALLOCATED); + +PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, + png_size_t png_info_struct_size)); + +/* Writes all the PNG information before the image. */ +PNG_EXPORT(20, void, png_write_info_before_PLTE, + (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(21, void, png_write_info, + (png_structp png_ptr, png_infop info_ptr)); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the information before the actual image data. */ +PNG_EXPORT(22, void, png_read_info, + (png_structp png_ptr, png_infop info_ptr)); +#endif + +#ifdef PNG_TIME_RFC1123_SUPPORTED +PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, + (png_structp png_ptr, + png_const_timep ptime)); +#endif + +#ifdef PNG_CONVERT_tIME_SUPPORTED +/* Convert from a struct tm to png_time */ +PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, + PNG_CONST struct tm FAR * ttime)); + +/* Convert from time_t to png_time. Uses gmtime() */ +PNG_EXPORT(25, void, png_convert_from_time_t, + (png_timep ptime, time_t ttime)); +#endif /* PNG_CONVERT_tIME_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ +PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* Expand to 16-bit channels, forces conversion of palette to RGB and expansion + * of a tRNS chunk if present. + */ +PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +/* Use blue, green, red order for pixels. */ +PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +/* Expand the grayscale to 24-bit RGB if necessary. */ +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +/* Reduce RGB to grayscale. */ +#define PNG_ERROR_ACTION_NONE 1 +#define PNG_ERROR_ACTION_WARN 2 +#define PNG_ERROR_ACTION_ERROR 3 +#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ + +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, + int error_action, double red, double green)); +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, + int error_action, png_fixed_point red, png_fixed_point green)); + +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp + png_ptr)); +#endif + +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, + png_colorp palette)); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +/* How the alpha channel is interpreted - this affects how the color channels of + * a PNG file are returned when an alpha channel, or tRNS chunk in a palette + * file, is present. + * + * This has no effect on the way pixels are written into a PNG output + * datastream. The color samples in a PNG datastream are never premultiplied + * with the alpha samples. + * + * The default is to return data according to the PNG specification: the alpha + * channel is a linear measure of the contribution of the pixel to the + * corresponding composited pixel. The gamma encoded color channels must be + * scaled according to the contribution and to do this it is necessary to undo + * the encoding, scale the color values, perform the composition and reencode + * the values. This is the 'PNG' mode. + * + * The alternative is to 'associate' the alpha with the color information by + * storing color channel values that have been scaled by the alpha. The + * advantage is that the color channels can be resampled (the image can be + * scaled) in this form. The disadvantage is that normal practice is to store + * linear, not (gamma) encoded, values and this requires 16-bit channels for + * still images rather than the 8-bit channels that are just about sufficient if + * gamma encoding is used. In addition all non-transparent pixel values, + * including completely opaque ones, must be gamma encoded to produce the final + * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the + * latter being the two common names for associated alpha color channels.) + * + * Since it is not necessary to perform arithmetic on opaque color values so + * long as they are not to be resampled and are in the final color space it is + * possible to optimize the handling of alpha by storing the opaque pixels in + * the PNG format (adjusted for the output color space) while storing partially + * opaque pixels in the standard, linear, format. The accuracy required for + * standard alpha composition is relatively low, because the pixels are + * isolated, therefore typically the accuracy loss in storing 8-bit linear + * values is acceptable. (This is not true if the alpha channel is used to + * simulate transparency over large areas - use 16 bits or the PNG mode in + * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is + * treated as opaque only if the alpha value is equal to the maximum value. + * + * The final choice is to gamma encode the alpha channel as well. This is + * broken because, in practice, no implementation that uses this choice + * correctly undoes the encoding before handling alpha composition. Use this + * choice only if other serious errors in the software or hardware you use + * mandate it; the typical serious error is for dark halos to appear around + * opaque areas of the composited PNG image because of arithmetic overflow. + * + * The API function png_set_alpha_mode specifies which of these choices to use + * with an enumerated 'mode' value and the gamma of the required output: + */ +#define PNG_ALPHA_PNG 0 /* according to the PNG standard */ +#define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ +#define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ +#define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ +#define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ +#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ + +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, + double output_gamma)); +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, + int mode, png_fixed_point output_gamma)); +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) +/* The output_gamma value is a screen gamma in libpng terminology: it expresses + * how to decode the output values, not how they are encoded. The values used + * correspond to the normal numbers used to describe the overall gamma of a + * computer display system; for example 2.2 for an sRGB conformant system. The + * values are scaled by 100000 in the _fixed version of the API (so 220000 for + * sRGB.) + * + * The inverse of the value is always used to provide a default for the PNG file + * encoding if it has no gAMA chunk and if png_set_gamma() has not been called + * to override the PNG gamma information. + * + * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode + * opaque pixels however pixels with lower alpha values are not encoded, + * regardless of the output gamma setting. + * + * When the standard Porter Duff handling is requested with mode 1 the output + * encoding is set to be linear and the output_gamma value is only relevant + * as a default for input data that has no gamma information. The linear output + * encoding will be overridden if png_set_gamma() is called - the results may be + * highly unexpected! + * + * The following numbers are derived from the sRGB standard and the research + * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of + * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing + * correction required to take account of any differences in the color + * environment of the original scene and the intended display environment; the + * value expresses how to *decode* the image for display, not how the original + * data was *encoded*. + * + * sRGB provides a peg for the PNG standard by defining a viewing environment. + * sRGB itself, and earlier TV standards, actually use a more complex transform + * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is + * limited to simple power laws.) By saying that an image for direct display on + * an sRGB conformant system should be stored with a gAMA chunk value of 45455 + * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification + * makes it possible to derive values for other display systems and + * environments. + * + * The Mac value is deduced from the sRGB based on an assumption that the actual + * extra viewing correction used in early Mac display systems was implemented as + * a power 1.45 lookup table. + * + * Any system where a programmable lookup table is used or where the behavior of + * the final display device characteristics can be changed requires system + * specific code to obtain the current characteristic. However this can be + * difficult and most PNG gamma correction only requires an approximate value. + * + * By default, if png_set_alpha_mode() is not called, libpng assumes that all + * values are unencoded, linear, values and that the output device also has a + * linear characteristic. This is only very rarely correct - it is invariably + * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the + * default if you don't know what the right answer is! + * + * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS + * 10.6) which used a correction table to implement a somewhat lower gamma on an + * otherwise sRGB system. + * + * Both these values are reserved (not simple gamma values) in order to allow + * more precise correction internally in the future. + * + * NOTE: the following values can be passed to either the fixed or floating + * point APIs, but the floating point API will also accept floating point + * values. + */ +#define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ +#define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ +#define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ +#define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ +#endif + +/* The following are examples of calls to png_set_alpha_mode to achieve the + * required overall gamma correction and, where necessary, alpha + * premultiplication. + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); + * This is the default libpng handling of the alpha channel - it is not + * pre-multiplied into the color components. In addition the call states + * that the output is for a sRGB system and causes all PNG files without gAMA + * chunks to be assumed to be encoded using sRGB. + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); + * In this case the output is assumed to be something like an sRGB conformant + * display preceeded by a power-law lookup table of power 1.45. This is how + * early Mac systems behaved. + * + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); + * This is the classic Jim Blinn approach and will work in academic + * environments where everything is done by the book. It has the shortcoming + * of assuming that input PNG data with no gamma information is linear - this + * is unlikely to be correct unless the PNG files where generated locally. + * Most of the time the output precision will be so low as to show + * significant banding in dark areas of the image. + * + * png_set_expand_16(pp); + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); + * This is a somewhat more realistic Jim Blinn inspired approach. PNG files + * are assumed to have the sRGB encoding if not marked with a gamma value and + * the output is always 16 bits per component. This permits accurate scaling + * and processing of the data. If you know that your input PNG files were + * generated locally you might need to replace PNG_DEFAULT_sRGB with the + * correct value for your system. + * + * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); + * If you just need to composite the PNG image onto an existing background + * and if you control the code that does this you can use the optimization + * setting. In this case you just copy completely opaque pixels to the + * output. For pixels that are not completely transparent (you just skip + * those) you do the composition math using png_composite or png_composite_16 + * below then encode the resultant 8-bit or 16-bit values to match the output + * encoding. + * + * Other cases + * If neither the PNG nor the standard linear encoding work for you because + * of the software or hardware you use then you have a big problem. The PNG + * case will probably result in halos around the image. The linear encoding + * will probably result in a washed out, too bright, image (it's actually too + * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably + * substantially reduce the halos. Alternatively try: + * + * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); + * This option will also reduce the halos, but there will be slight dark + * halos round the opaque parts of the image where the background is light. + * In the OPTIMIZED mode the halos will be light halos where the background + * is dark. Take your pick - the halos are unavoidable unless you can get + * your hardware/software fixed! (The OPTIMIZED approach is slightly + * faster.) + * + * When the default gamma of PNG files doesn't match the output gamma. + * If you have PNG files with no gamma information png_set_alpha_mode allows + * you to provide a default gamma, but it also sets the ouput gamma to the + * matching value. If you know your PNG files have a gamma that doesn't + * match the output you can take advantage of the fact that + * png_set_alpha_mode always sets the output gamma but only sets the PNG + * default if it is not already set: + * + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); + * The first call sets both the default and the output gamma values, the + * second call overrides the output gamma without changing the default. This + * is easier than achieving the same effect with png_set_gamma. You must use + * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will + * fire if more than one call to png_set_alpha_mode and png_set_background is + * made in the same read operation, however multiple calls with PNG_ALPHA_PNG + * are ignored. + */ + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) +/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ +PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, + int flags)); +/* The values of the PNG_FILLER_ defines should NOT be changed */ +# define PNG_FILLER_BEFORE 0 +# define PNG_FILLER_AFTER 1 +/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ +PNG_EXPORT(40, void, png_set_add_alpha, + (png_structp png_ptr, png_uint_32 filler, + int flags)); +#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ + +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +/* Swap bytes in 16-bit depth files. */ +PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) +/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ +PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ + defined(PNG_WRITE_PACKSWAP_SUPPORTED) +/* Swap packing order of pixels in bytes. */ +PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) +/* Converts files to legal bit depths. */ +PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p + true_bits)); +#endif + +#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ + defined(PNG_WRITE_INTERLACING_SUPPORTED) +/* Have the code handle the interlacing. Returns the number of passes. + * MUST be called before png_read_update_info or png_start_read_image, + * otherwise it will not have the desired effect. Note that it is still + * necessary to call png_read_row or png_read_rows png_get_image_height + * times for each pass. +*/ +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); +#endif + +#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) +/* Invert monochrome files */ +PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_BACKGROUND_SUPPORTED +/* Handle alpha and tRNS by replacing with a background color. Prior to + * libpng-1.5.4 this API must not be called before the PNG file header has been + * read. Doing so will result in unexpected behavior and possible warnings or + * errors if the PNG file contains a bKGD chunk. + */ +PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, double background_gamma)); +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, png_fixed_point background_gamma)); +#endif +#ifdef PNG_READ_BACKGROUND_SUPPORTED +# define PNG_BACKGROUND_GAMMA_UNKNOWN 0 +# define PNG_BACKGROUND_GAMMA_SCREEN 1 +# define PNG_BACKGROUND_GAMMA_FILE 2 +# define PNG_BACKGROUND_GAMMA_UNIQUE 3 +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +/* Scale a 16-bit depth file down to 8-bit, accurately. */ +PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ +/* Strip the second byte of information from a 16-bit depth file. */ +PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +/* Turn on quantizing, and reduce the palette to the number of colors + * available. + */ +PNG_EXPORT(49, void, png_set_quantize, + (png_structp png_ptr, png_colorp palette, + int num_palette, int maximum_colors, png_const_uint_16p histogram, + int full_quantize)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* The threshold on gamma processing is configurable but hard-wired into the + * library. The following is the floating point variant. + */ +#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) + +/* Handle gamma correction. Screen_gamma=(display_exponent). + * NOTE: this API simply sets the screen and file gamma values. It will + * therefore override the value for gamma in a PNG file if it is called after + * the file header has been read - use with care - call before reading the PNG + * file for best results! + * + * These routines accept the same gamma values as png_set_alpha_mode (described + * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either + * API (floating point or fixed.) Notice, however, that the 'file_gamma' value + * is the inverse of a 'screen gamma' value. + */ +PNG_FP_EXPORT(50, void, png_set_gamma, + (png_structp png_ptr, double screen_gamma, + double override_file_gamma)); +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, + png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); +#endif + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +/* Set how many lines between output flushes - 0 for no flushing */ +PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); +/* Flush the current PNG output buffer */ +PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); +#endif + +/* Optional update palette with requested transformations */ +PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); + +/* Optional call to update the users info structure */ +PNG_EXPORT(54, void, png_read_update_info, + (png_structp png_ptr, png_infop info_ptr)); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read one or more rows of image data. */ +PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, + png_bytepp display_row, png_uint_32 num_rows)); +#endif + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read a row of data. */ +PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, + png_bytep display_row)); +#endif + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the whole image into memory at once. */ +PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); +#endif + +/* Write a row of image data */ +PNG_EXPORT(58, void, png_write_row, + (png_structp png_ptr, png_const_bytep row)); + +/* Write a few rows of image data: (*row) is not written; however, the type + * is declared as writeable to maintain compatibility with previous versions + * of libpng and to allow the 'display_row' array from read_rows to be passed + * unchanged to write_rows. + */ +PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, + png_uint_32 num_rows)); + +/* Write the image data */ +PNG_EXPORT(60, void, png_write_image, + (png_structp png_ptr, png_bytepp image)); + +/* Write the end of the PNG file. */ +PNG_EXPORT(61, void, png_write_end, + (png_structp png_ptr, png_infop info_ptr)); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the end of the PNG file. */ +PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); +#endif + +/* Free any memory associated with the png_info_struct */ +PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, + png_infopp info_ptr_ptr)); + +/* Free any memory associated with the png_struct and the png_info_structs */ +PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, + png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); + +/* Free any memory associated with the png_struct and the png_info_structs */ +PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, + png_infopp info_ptr_ptr)); + +/* Set the libpng method of handling chunk CRC errors */ +PNG_EXPORT(66, void, png_set_crc_action, + (png_structp png_ptr, int crit_action, int ancil_action)); + +/* Values for png_set_crc_action() say how to handle CRC errors in + * ancillary and critical chunks, and whether to use the data contained + * therein. Note that it is impossible to "discard" data in a critical + * chunk. For versions prior to 0.90, the action was always error/quit, + * whereas in version 0.90 and later, the action for CRC errors in ancillary + * chunks is warn/discard. These values should NOT be changed. + * + * value action:critical action:ancillary + */ +#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ +#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ +#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ +#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ +#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ +#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ + +/* These functions give the user control over the scan-line filtering in + * libpng and the compression methods used by zlib. These functions are + * mainly useful for testing, as the defaults should work with most users. + * Those users who are tight on memory or want faster performance at the + * expense of compression can modify them. See the compression library + * header file (zlib.h) for an explination of the compression functions. + */ + +/* Set the filtering method(s) used by libpng. Currently, the only valid + * value for "method" is 0. + */ +PNG_EXPORT(67, void, png_set_filter, + (png_structp png_ptr, int method, int filters)); + +/* Flags for png_set_filter() to say which filters to use. The flags + * are chosen so that they don't conflict with real filter types + * below, in case they are supplied instead of the #defined constants. + * These values should NOT be changed. + */ +#define PNG_NO_FILTERS 0x00 +#define PNG_FILTER_NONE 0x08 +#define PNG_FILTER_SUB 0x10 +#define PNG_FILTER_UP 0x20 +#define PNG_FILTER_AVG 0x40 +#define PNG_FILTER_PAETH 0x80 +#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ + PNG_FILTER_AVG | PNG_FILTER_PAETH) + +/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. + * These defines should NOT be changed. + */ +#define PNG_FILTER_VALUE_NONE 0 +#define PNG_FILTER_VALUE_SUB 1 +#define PNG_FILTER_VALUE_UP 2 +#define PNG_FILTER_VALUE_AVG 3 +#define PNG_FILTER_VALUE_PAETH 4 +#define PNG_FILTER_VALUE_LAST 5 + +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ +/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ + * defines, either the default (minimum-sum-of-absolute-differences), or + * the experimental method (weighted-minimum-sum-of-absolute-differences). + * + * Weights are factors >= 1.0, indicating how important it is to keep the + * filter type consistent between rows. Larger numbers mean the current + * filter is that many times as likely to be the same as the "num_weights" + * previous filters. This is cumulative for each previous row with a weight. + * There needs to be "num_weights" values in "filter_weights", or it can be + * NULL if the weights aren't being specified. Weights have no influence on + * the selection of the first row filter. Well chosen weights can (in theory) + * improve the compression for a given image. + * + * Costs are factors >= 1.0 indicating the relative decoding costs of a + * filter type. Higher costs indicate more decoding expense, and are + * therefore less likely to be selected over a filter with lower computational + * costs. There needs to be a value in "filter_costs" for each valid filter + * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't + * setting the costs. Costs try to improve the speed of decompression without + * unduly increasing the compressed image size. + * + * A negative weight or cost indicates the default value is to be used, and + * values in the range [0.0, 1.0) indicate the value is to remain unchanged. + * The default values for both weights and costs are currently 1.0, but may + * change if good general weighting/cost heuristics can be found. If both + * the weights and costs are set to 1.0, this degenerates the WEIGHTED method + * to the UNWEIGHTED method, but with added encoding time/computation. + */ +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, + int heuristic_method, int num_weights, png_const_doublep filter_weights, + png_const_doublep filter_costs)); +PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, + (png_structp png_ptr, + int heuristic_method, int num_weights, png_const_fixed_point_p + filter_weights, png_const_fixed_point_p filter_costs)); +#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ + +/* Heuristic used for row filter selection. These defines should NOT be + * changed. + */ +#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ +#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ +#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ +#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ + +#ifdef PNG_WRITE_SUPPORTED +/* Set the library compression level. Currently, valid values range from + * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 + * (0 - no compression, 9 - "maximal" compression). Note that tests have + * shown that zlib compression levels 3-6 usually perform as well as level 9 + * for PNG images, and do considerably fewer caclulations. In the future, + * these values may not correspond directly to the zlib compression levels. + */ +PNG_EXPORT(69, void, png_set_compression_level, + (png_structp png_ptr, int level)); + +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, + int mem_level)); + +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, + int strategy)); + +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, + int window_bits)); + +PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, + int method)); +#endif + +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +/* Also set zlib parameters for compressing non-IDAT chunks */ +PNG_EXPORT(222, void, png_set_text_compression_level, + (png_structp png_ptr, int level)); + +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, + int mem_level)); + +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, + int strategy)); + +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a + * smaller value of window_bits if it can do so safely. + */ +PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp + png_ptr, int window_bits)); + +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, + int method)); +#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ + +/* These next functions are called for input/output, memory, and error + * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, + * and call standard C I/O routines such as fread(), fwrite(), and + * fprintf(). These functions can be made to use other I/O routines + * at run time for those applications that need to handle I/O in a + * different manner by calling png_set_???_fn(). See libpng-manual.txt for + * more information. + */ + +#ifdef PNG_STDIO_SUPPORTED +/* Initialize the input/output for the PNG file to the default functions. */ +PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); +#endif + +/* Replace the (error and abort), and warning functions with user + * supplied functions. If no messages are to be printed you must still + * write and use replacement functions. The replacement error_fn should + * still do a longjmp to the last setjmp location if you are using this + * method of error handling. If error_fn or warning_fn is NULL, the + * default function will be used. + */ + +PNG_EXPORT(75, void, png_set_error_fn, + (png_structp png_ptr, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warning_fn)); + +/* Return the user pointer associated with the error functions */ +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); + +/* Replace the default data output functions with a user supplied one(s). + * If buffered output is not used, then output_flush_fn can be set to NULL. + * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time + * output_flush_fn will be ignored (and thus can be NULL). + * It is probably a mistake to use NULL for output_flush_fn if + * write_data_fn is not also NULL unless you have built libpng with + * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's + * default flush function, which uses the standard *FILE structure, will + * be used. + */ +PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, + png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); + +/* Replace the default data input function with a user supplied one. */ +PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, + png_rw_ptr read_data_fn)); + +/* Return the user pointer associated with the I/O functions */ +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); + +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, + png_read_status_ptr read_row_fn)); + +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, + png_write_status_ptr write_row_fn)); + +#ifdef PNG_USER_MEM_SUPPORTED +/* Replace the default memory allocation functions with user supplied one(s). */ +PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn)); +/* Return the user pointer associated with the memory functions */ +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); +#endif + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, + png_user_transform_ptr read_user_transform_fn)); +#endif + +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, + png_user_transform_ptr write_user_transform_fn)); +#endif + +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, + png_voidp user_transform_ptr, int user_transform_depth, + int user_transform_channels)); +/* Return the user pointer associated with the user transform functions */ +PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, + (png_const_structp png_ptr)); +#endif + +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED +/* Return information about the row currently being processed. Note that these + * APIs do not fail but will return unexpected results if called outside a user + * transform callback. Also note that when transforming an interlaced image the + * row number is the row number within the sub-image of the interlace pass, so + * the value will increase to the height of the sub-image (not the full image) + * then reset to 0 for the next pass. + * + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to + * find the output pixel (x,y) given an interlaced sub-image pixel + * (row,col,pass). (See below for these macros.) + */ +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, + png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); +#endif + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +/* Sets the function callbacks for the push reader, and a pointer to a + * user-defined structure available to the callback functions. + */ +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, + png_voidp progressive_ptr, png_progressive_info_ptr info_fn, + png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); + +/* Returns the user pointer associated with the push read functions */ +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); + +/* Function to be called when data becomes available */ +PNG_EXPORT(92, void, png_process_data, + (png_structp png_ptr, png_infop info_ptr, + png_bytep buffer, png_size_t buffer_size)); + +/* A function which may be called *only* within png_process_data to stop the + * processing of any more data. The function returns the number of bytes + * remaining, excluding any that libpng has cached internally. A subsequent + * call to png_process_data must supply these bytes again. If the argument + * 'save' is set to true the routine will first save all the pending data and + * will always return 0. + */ +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); + +/* A function which may be called *only* outside (after) a call to + * png_process_data. It returns the number of bytes of data to skip in the + * input. Normally it will return 0, but if it returns a non-zero value the + * application must skip than number of bytes of input data and pass the + * following data to the next call to png_process_data. + */ +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); + +#ifdef PNG_READ_INTERLACING_SUPPORTED +/* Function that combines rows. 'new_row' is a flag that should come from + * the callback and be non-NULL if anything needs to be done; the library + * stores its own version of the new data internally and ignores the passed + * in value. + */ +PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, + png_bytep old_row, png_const_bytep new_row)); +#endif /* PNG_READ_INTERLACING_SUPPORTED */ +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +PNG_EXPORTA(94, png_voidp, png_malloc, + (png_structp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED); +/* Added at libpng version 1.4.0 */ +PNG_EXPORTA(95, png_voidp, png_calloc, + (png_structp png_ptr, png_alloc_size_t size), + PNG_ALLOCATED); + +/* Added at libpng version 1.2.4 */ +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); + +/* Frees a pointer allocated by png_malloc() */ +PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); + +/* Free data that was allocated internally */ +PNG_EXPORT(98, void, png_free_data, + (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); + +/* Reassign responsibility for freeing existing data, whether allocated + * by libpng or by the application */ +PNG_EXPORT(99, void, png_data_freer, + (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); + +/* Assignments for png_data_freer */ +#define PNG_DESTROY_WILL_FREE_DATA 1 +#define PNG_SET_WILL_FREE_DATA 1 +#define PNG_USER_WILL_FREE_DATA 2 +/* Flags for png_ptr->free_me and info_ptr->free_me */ +#define PNG_FREE_HIST 0x0008 +#define PNG_FREE_ICCP 0x0010 +#define PNG_FREE_SPLT 0x0020 +#define PNG_FREE_ROWS 0x0040 +#define PNG_FREE_PCAL 0x0080 +#define PNG_FREE_SCAL 0x0100 +#define PNG_FREE_UNKN 0x0200 +#define PNG_FREE_LIST 0x0400 +#define PNG_FREE_PLTE 0x1000 +#define PNG_FREE_TRNS 0x2000 +#define PNG_FREE_TEXT 0x4000 +#define PNG_FREE_ALL 0x7fff +#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ + +#ifdef PNG_USER_MEM_SUPPORTED +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); +PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); +#endif + +#ifdef PNG_ERROR_TEXT_SUPPORTED +/* Fatal error in PNG image of libpng - can't continue */ +PNG_EXPORTA(102, void, png_error, + (png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN); + +/* The same, but the chunk name is prepended to the error string. */ +PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, + png_const_charp error_message), PNG_NORETURN); + +#else +/* Fatal error in PNG image of libpng - can't continue */ +PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); +#endif + +#ifdef PNG_WARNINGS_SUPPORTED +/* Non-fatal error in libpng. Can continue, but may have a problem. */ +PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, + png_const_charp warning_message)); + +/* Non-fatal error in libpng, chunk name is prepended to message. */ +PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, + png_const_charp warning_message)); +#endif + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +/* Benign error in libpng. Can continue, but may have a problem. + * User can choose whether to handle as a fatal error or as a warning. */ +# undef png_benign_error +PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, + png_const_charp warning_message)); + +/* Same, chunk name is prepended to message. */ +# undef png_chunk_benign_error +PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, + png_const_charp warning_message)); + +PNG_EXPORT(109, void, png_set_benign_errors, + (png_structp png_ptr, int allowed)); +#else +# ifdef PNG_ALLOW_BENIGN_ERRORS +# define png_benign_error png_warning +# define png_chunk_benign_error png_chunk_warning +# else +# define png_benign_error png_error +# define png_chunk_benign_error png_chunk_error +# endif +#endif + +/* The png_set_ functions are for storing values in the png_info_struct. + * Similarly, the png_get_ calls are used to read values from the + * png_info_struct, either storing the parameters in the passed variables, or + * setting pointers into the png_info_struct where the data is stored. The + * png_get_ functions return a non-zero value if the data was available + * in info_ptr, or return zero and do not change any of the parameters if the + * data was not available. + * + * These functions should be used instead of directly accessing png_info + * to avoid problems with future changes in the size and internal layout of + * png_info_struct. + */ +/* Returns "flag" if chunk data is valid in info_ptr. */ +PNG_EXPORT(110, png_uint_32, png_get_valid, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 flag)); + +/* Returns number of bytes needed to hold a transformed row. */ +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +#ifdef PNG_INFO_IMAGE_SUPPORTED +/* Returns row_pointers, which is an array of pointers to scanlines that was + * returned from png_read_png(). + */ +PNG_EXPORT(112, png_bytepp, png_get_rows, + (png_const_structp png_ptr, png_const_infop info_ptr)); +/* Set row_pointers, which is an array of pointers to scanlines for use + * by png_write_png(). + */ +PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, + png_infop info_ptr, png_bytepp row_pointers)); +#endif + +/* Returns number of color channels in image. */ +PNG_EXPORT(114, png_byte, png_get_channels, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +#ifdef PNG_EASY_ACCESS_SUPPORTED +/* Returns image width in pixels. */ +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image height in pixels. */ +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image bit_depth. */ +PNG_EXPORT(117, png_byte, png_get_bit_depth, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +/* Returns image color_type. */ +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image filter_type. */ +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image interlace_type. */ +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image compression_type. */ +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, + png_const_infop info_ptr)); + +/* Returns image resolution in pixels per meter, from pHYs chunk data. */ +PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +/* Returns pixel aspect ratio, computed from pHYs chunk data. */ +PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ +PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, + (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +#endif /* PNG_EASY_ACCESS_SUPPORTED */ + +/* Returns pointer to signature string read from PNG header */ +PNG_EXPORT(130, png_const_bytep, png_get_signature, + (png_const_structp png_ptr, png_infop info_ptr)); + +#ifdef PNG_bKGD_SUPPORTED +PNG_EXPORT(131, png_uint_32, png_get_bKGD, + (png_const_structp png_ptr, png_infop info_ptr, + png_color_16p *background)); +#endif + +#ifdef PNG_bKGD_SUPPORTED +PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, + png_const_color_16p background)); +#endif + +#ifdef PNG_cHRM_SUPPORTED +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, + png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, + double *red_y, double *green_x, double *green_y, double *blue_x, + double *blue_y)); +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, + png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, + double *green_X, double *green_Y, double *green_Z, double *blue_X, + double *blue_Y, double *blue_Z)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ +PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, + (png_const_structp png_ptr, + png_const_infop info_ptr, png_fixed_point *int_white_x, + png_fixed_point *int_white_y, png_fixed_point *int_red_x, + png_fixed_point *int_red_y, png_fixed_point *int_green_x, + png_fixed_point *int_green_y, png_fixed_point *int_blue_x, + png_fixed_point *int_blue_y)); +#endif +PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, + (png_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z)); +#endif + +#ifdef PNG_cHRM_SUPPORTED +PNG_FP_EXPORT(135, void, png_set_cHRM, + (png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, double green_x, + double green_y, double blue_x, double blue_y)); +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, + png_infop info_ptr, double red_X, double red_Y, double red_Z, + double green_X, double green_Y, double green_Z, double blue_X, + double blue_Y, double blue_Z)); +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_white_x, + png_fixed_point int_white_y, png_fixed_point int_red_x, + png_fixed_point int_red_y, png_fixed_point int_green_x, + png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_red_Z, png_fixed_point int_green_X, + png_fixed_point int_green_Y, png_fixed_point int_green_Z, + png_fixed_point int_blue_X, png_fixed_point int_blue_Y, + png_fixed_point int_blue_Z)); +#endif + +#ifdef PNG_gAMA_SUPPORTED +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, + (png_const_structp png_ptr, png_const_infop info_ptr, + double *file_gamma)); +PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_file_gamma)); +#endif + +#ifdef PNG_gAMA_SUPPORTED +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, + png_infop info_ptr, double file_gamma)); +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_file_gamma)); +#endif + +#ifdef PNG_hIST_SUPPORTED +PNG_EXPORT(141, png_uint_32, png_get_hIST, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_16p *hist)); +#endif + +#ifdef PNG_hIST_SUPPORTED +PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, + png_infop info_ptr, png_const_uint_16p hist)); +#endif + +PNG_EXPORT(143, png_uint_32, png_get_IHDR, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, + int *interlace_method, int *compression_method, int *filter_method)); + +PNG_EXPORT(144, void, png_set_IHDR, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, + int interlace_method, int compression_method, int filter_method)); + +#ifdef PNG_oFFs_SUPPORTED +PNG_EXPORT(145, png_uint_32, png_get_oFFs, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); +#endif + +#ifdef PNG_oFFs_SUPPORTED +PNG_EXPORT(146, void, png_set_oFFs, + (png_structp png_ptr, png_infop info_ptr, + png_int_32 offset_x, png_int_32 offset_y, int unit_type)); +#endif + +#ifdef PNG_pCAL_SUPPORTED +PNG_EXPORT(147, png_uint_32, png_get_pCAL, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, + int *nparams, + png_charp *units, png_charpp *params)); +#endif + +#ifdef PNG_pCAL_SUPPORTED +PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, + png_infop info_ptr, + png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, + int nparams, png_const_charp units, png_charpp params)); +#endif + +#ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(149, png_uint_32, png_get_pHYs, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +#endif + +#ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(150, void, png_set_pHYs, + (png_structp png_ptr, png_infop info_ptr, + png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +#endif + +PNG_EXPORT(151, png_uint_32, png_get_PLTE, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_colorp *palette, int *num_palette)); + +PNG_EXPORT(152, void, png_set_PLTE, + (png_structp png_ptr, png_infop info_ptr, + png_const_colorp palette, int num_palette)); + +#ifdef PNG_sBIT_SUPPORTED +PNG_EXPORT(153, png_uint_32, png_get_sBIT, + (png_const_structp png_ptr, png_infop info_ptr, + png_color_8p *sig_bit)); +#endif + +#ifdef PNG_sBIT_SUPPORTED +PNG_EXPORT(154, void, png_set_sBIT, + (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); +#endif + +#ifdef PNG_sRGB_SUPPORTED +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, + png_const_infop info_ptr, int *file_srgb_intent)); +#endif + +#ifdef PNG_sRGB_SUPPORTED +PNG_EXPORT(156, void, png_set_sRGB, + (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, + png_infop info_ptr, int srgb_intent)); +#endif + +#ifdef PNG_iCCP_SUPPORTED +PNG_EXPORT(158, png_uint_32, png_get_iCCP, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_charpp name, int *compression_type, png_bytepp profile, + png_uint_32 *proflen)); +#endif + +#ifdef PNG_iCCP_SUPPORTED +PNG_EXPORT(159, void, png_set_iCCP, + (png_structp png_ptr, png_infop info_ptr, + png_const_charp name, int compression_type, png_const_bytep profile, + png_uint_32 proflen)); +#endif + +#ifdef PNG_sPLT_SUPPORTED +PNG_EXPORT(160, png_uint_32, png_get_sPLT, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_sPLT_tpp entries)); +#endif + +#ifdef PNG_sPLT_SUPPORTED +PNG_EXPORT(161, void, png_set_sPLT, + (png_structp png_ptr, png_infop info_ptr, + png_const_sPLT_tp entries, int nentries)); +#endif + +#ifdef PNG_TEXT_SUPPORTED +/* png_get_text also returns the number of text chunks in *num_text */ +PNG_EXPORT(162, png_uint_32, png_get_text, + (png_const_structp png_ptr, png_const_infop info_ptr, + png_textp *text_ptr, int *num_text)); +#endif + +/* Note while png_set_text() will accept a structure whose text, + * language, and translated keywords are NULL pointers, the structure + * returned by png_get_text will always contain regular + * zero-terminated C strings. They might be empty strings but + * they will never be NULL pointers. + */ + +#ifdef PNG_TEXT_SUPPORTED +PNG_EXPORT(163, void, png_set_text, + (png_structp png_ptr, png_infop info_ptr, + png_const_textp text_ptr, int num_text)); +#endif + +#ifdef PNG_tIME_SUPPORTED +PNG_EXPORT(164, png_uint_32, png_get_tIME, + (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); +#endif + +#ifdef PNG_tIME_SUPPORTED +PNG_EXPORT(165, void, png_set_tIME, + (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); +#endif + +#ifdef PNG_tRNS_SUPPORTED +PNG_EXPORT(166, png_uint_32, png_get_tRNS, + (png_const_structp png_ptr, png_infop info_ptr, + png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); +#endif + +#ifdef PNG_tRNS_SUPPORTED +PNG_EXPORT(167, void, png_set_tRNS, + (png_structp png_ptr, png_infop info_ptr, + png_const_bytep trans_alpha, int num_trans, + png_const_color_16p trans_color)); +#endif + +#ifdef PNG_sCAL_SUPPORTED +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, + (png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, double *width, double *height)); +#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +/* NOTE: this API is currently implemented using floating point arithmetic, + * consequently it can only be used on systems with floating point support. + * In any case the range of values supported by png_fixed_point is small and it + * is highly recommended that png_get_sCAL_s be used instead. + */ +PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, + (png_structp png_ptr, png_const_infop info_ptr, int *unit, + png_fixed_point *width, + png_fixed_point *height)); +#endif +PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, + (png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, png_charpp swidth, png_charpp sheight)); + +PNG_FP_EXPORT(170, void, png_set_sCAL, + (png_structp png_ptr, png_infop info_ptr, + int unit, double width, double height)); +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, + png_infop info_ptr, int unit, png_fixed_point width, + png_fixed_point height)); +PNG_EXPORT(171, void, png_set_sCAL_s, + (png_structp png_ptr, png_infop info_ptr, + int unit, png_const_charp swidth, png_const_charp sheight)); +#endif /* PNG_sCAL_SUPPORTED */ + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +/* Provide a list of chunks and how they are to be handled, if the built-in + handling or default unknown chunk handling is not desired. Any chunks not + listed will be handled in the default manner. The IHDR and IEND chunks + must not be listed. Because this turns off the default handling for chunks + that would otherwise be recognized the behavior of libpng transformations may + well become incorrect! + keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior + = 1: PNG_HANDLE_CHUNK_NEVER: do not keep + = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy + = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy +*/ +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, + (png_structp png_ptr, int keep, + png_const_bytep chunk_list, int num_chunks)); + +/* The handling code is returned; the result is therefore true (non-zero) if + * special handling is required, false for the default handling. + */ +PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, + png_const_bytep chunk_name)); +#endif +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, + png_infop info_ptr, png_const_unknown_chunkp unknowns, + int num_unknowns)); +PNG_EXPORT(175, void, png_set_unknown_chunk_location, + (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, + png_const_infop info_ptr, png_unknown_chunkpp entries)); +#endif + +/* Png_free_data() will turn off the "valid" flag for anything it frees. + * If you need to turn it off for a chunk that your application has freed, + * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); + */ +PNG_EXPORT(177, void, png_set_invalid, + (png_structp png_ptr, png_infop info_ptr, int mask)); + +#ifdef PNG_INFO_IMAGE_SUPPORTED +/* The "params" pointer is currently not used and is for future expansion. */ +PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, + int transforms, png_voidp params)); +PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, + int transforms, png_voidp params)); +#endif + +PNG_EXPORT(180, png_const_charp, png_get_copyright, + (png_const_structp png_ptr)); +PNG_EXPORT(181, png_const_charp, png_get_header_ver, + (png_const_structp png_ptr)); +PNG_EXPORT(182, png_const_charp, png_get_header_version, + (png_const_structp png_ptr)); +PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, + (png_const_structp png_ptr)); + +#ifdef PNG_MNG_FEATURES_SUPPORTED +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, + png_uint_32 mng_features_permitted)); +#endif + +/* For use in png_set_keep_unknown, added to version 1.2.6 */ +#define PNG_HANDLE_CHUNK_AS_DEFAULT 0 +#define PNG_HANDLE_CHUNK_NEVER 1 +#define PNG_HANDLE_CHUNK_IF_SAFE 2 +#define PNG_HANDLE_CHUNK_ALWAYS 3 + +/* Strip the prepended error numbers ("#nnn ") from error and warning + * messages before passing them to the error or warning handler. + */ +#ifdef PNG_ERROR_NUMBERS_SUPPORTED +PNG_EXPORT(185, void, png_set_strip_error_numbers, + (png_structp png_ptr, + png_uint_32 strip_mode)); +#endif + +/* Added in libpng-1.2.6 */ +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, + png_uint_32 user_width_max, png_uint_32 user_height_max)); +PNG_EXPORT(187, png_uint_32, png_get_user_width_max, + (png_const_structp png_ptr)); +PNG_EXPORT(188, png_uint_32, png_get_user_height_max, + (png_const_structp png_ptr)); +/* Added in libpng-1.4.0 */ +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, + png_uint_32 user_chunk_cache_max)); +PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, + (png_const_structp png_ptr)); +/* Added in libpng-1.4.1 */ +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, + png_alloc_size_t user_chunk_cache_max)); +PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, + (png_const_structp png_ptr)); +#endif + +#if defined(PNG_INCH_CONVERSIONS_SUPPORTED) +PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, + (png_const_structp png_ptr, png_const_infop info_ptr)); + +PNG_FP_EXPORT(196, float, png_get_x_offset_inches, + (png_const_structp png_ptr, png_const_infop info_ptr)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ +PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, + (png_structp png_ptr, png_const_infop info_ptr)); +#endif + +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, + png_const_infop info_ptr)); +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ +PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, + (png_structp png_ptr, png_const_infop info_ptr)); +#endif + +# ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, + png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, + int *unit_type)); +# endif /* PNG_pHYs_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ + +/* Added in libpng-1.4.0 */ +#ifdef PNG_IO_STATE_SUPPORTED +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); + +PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, + (png_structp png_ptr), PNG_DEPRECATED); +PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, + (png_const_structp png_ptr)); + +/* The flags returned by png_get_io_state() are the following: */ +# define PNG_IO_NONE 0x0000 /* no I/O at this moment */ +# define PNG_IO_READING 0x0001 /* currently reading */ +# define PNG_IO_WRITING 0x0002 /* currently writing */ +# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ +# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ +# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ +# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ +# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ +# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ +#endif /* ?PNG_IO_STATE_SUPPORTED */ + +/* Interlace support. The following macros are always defined so that if + * libpng interlace handling is turned off the macros may be used to handle + * interlaced images within the application. + */ +#define PNG_INTERLACE_ADAM7_PASSES 7 + +/* Two macros to return the first row and first column of the original, + * full, image which appears in a given pass. 'pass' is in the range 0 + * to 6 and the result is in the range 0 to 7. + */ +#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) +#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) + +/* A macro to return the offset between pixels in the output row for a pair of + * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that + * follows. Note that ROW_OFFSET is the offset from one row to the next whereas + * COL_OFFSET is from one column to the next, within a row. + */ +#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) +#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) + +/* Two macros to help evaluate the number of rows or columns in each + * pass. This is expressed as a shift - effectively log2 of the number or + * rows or columns in each 8x8 tile of the original image. + */ +#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) +#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) + +/* Hence two macros to determine the number of rows or columns in a given + * pass of an image given its height or width. In fact these macros may + * return non-zero even though the sub-image is empty, because the other + * dimension may be empty for a small image. + */ +#define PNG_PASS_ROWS(height, pass) (((height)+(((1<>PNG_PASS_ROW_SHIFT(pass)) +#define PNG_PASS_COLS(width, pass) (((width)+(((1<>PNG_PASS_COL_SHIFT(pass)) + +/* For the reader row callbacks (both progressive and sequential) it is + * necessary to find the row in the output image given a row in an interlaced + * image, so two more macros: + */ +#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ + (((yIn)<>(((7-(off))-(pass))<<2)) & 0xF) | \ + ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) + +#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ + ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) +#define PNG_COL_IN_INTERLACE_PASS(x, pass) \ + ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) + +#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED +/* With these routines we avoid an integer divide, which will be slower on + * most machines. However, it does take more operations than the corresponding + * divide method, so it may be slower on a few RISC systems. There are two + * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. + * + * Note that the rounding factors are NOT supposed to be the same! 128 and + * 32768 are correct for the NODIV code; 127 and 32767 are correct for the + * standard method. + * + * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] + */ + + /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ + +# define png_composite(composite, fg, alpha, bg) \ + { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ + * (png_uint_16)(alpha) \ + + (png_uint_16)(bg)*(png_uint_16)(255 \ + - (png_uint_16)(alpha)) + 128); \ + (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } + +# define png_composite_16(composite, fg, alpha, bg) \ + { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ + * (png_uint_32)(alpha) \ + + (png_uint_32)(bg)*(65535 \ + - (png_uint_32)(alpha)) + 32768); \ + (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } + +#else /* Standard method using integer division */ + +# define png_composite(composite, fg, alpha, bg) \ + (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ + (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ + 127) / 255) + +# define png_composite_16(composite, fg, alpha, bg) \ + (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ + (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ + 32767) / 65535) +#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ + +#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); +PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); +PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); +#endif + +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, + png_const_bytep buf)); +/* No png_get_int_16 -- may be added if there's a real need for it. */ + +/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); +#endif +#ifdef PNG_SAVE_INT_32_SUPPORTED +PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); +#endif + +/* Place a 16-bit number into a buffer in PNG byte order. + * The parameter is declared unsigned int, not png_uint_16, + * just to avoid potential problems on pre-ANSI C compilers. + */ +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED +PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); +/* No png_save_int_16 -- may be added if there's a real need for it. */ +#endif + +#ifdef PNG_USE_READ_MACROS +/* Inline macros to do direct reads of bytes from the input buffer. + * The png_get_int_32() routine assumes we are using two's complement + * format for negative values, which is almost certainly true. + */ +# define png_get_uint_32(buf) \ + (((png_uint_32)(*(buf)) << 24) + \ + ((png_uint_32)(*((buf) + 1)) << 16) + \ + ((png_uint_32)(*((buf) + 2)) << 8) + \ + ((png_uint_32)(*((buf) + 3)))) + + /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the + * function) incorrectly returned a value of type png_uint_32. + */ +# define png_get_uint_16(buf) \ + ((png_uint_16) \ + (((unsigned int)(*(buf)) << 8) + \ + ((unsigned int)(*((buf) + 1))))) + +# define png_get_int_32(buf) \ + ((png_int_32)((*(buf) & 0x80) \ + ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ + : (png_int_32)png_get_uint_32(buf))) +#endif + +/* Maintainer: Put new public prototypes here ^, in libpng.3, and project + * defs + */ + +/* The last ordinal number (this is the *last* one already used; the next + * one to use is one more than this.) Maintainer, remember to add an entry to + * scripts/symbols.def as well. + */ +#ifdef PNG_EXPORT_LAST_ORDINAL + PNG_EXPORT_LAST_ORDINAL(233); +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* PNG_VERSION_INFO_ONLY */ +/* Do not put anything past this line */ +#endif /* PNG_H */ diff --git a/ExternalLibs/glpng/png/pngconf.h b/ExternalLibs/glpng/png/pngconf.h index 55fdc9f..0ff169e 100644 --- a/ExternalLibs/glpng/png/pngconf.h +++ b/ExternalLibs/glpng/png/pngconf.h @@ -1,470 +1,596 @@ - -/* pngconf.h - machine configurable file for libpng - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - */ - -/* Any machine specific code is near the front of this file, so if you - * are configuring libpng for a machine, you may want to read the section - * starting here down to where it starts to typedef png_color, png_text, - * and png_info. - */ - -#ifndef PNGCONF_H -#define PNGCONF_H - -/* This is the size of the compression buffer, and thus the size of - * an IDAT chunk. Make this whatever size you feel is best for your - * machine. One of these will be allocated per png_struct. When this - * is full, it writes the data to the disk, and does some other - * calculations. Making this an extremely small size will slow - * the library down, but you may want to experiment to determine - * where it becomes significant, if you are concerned with memory - * usage. Note that zlib allocates at least 32Kb also. For readers, - * this describes the size of the buffer available to read the data in. - * Unless this gets smaller than the size of a row (compressed), - * it should not make much difference how big this is. - */ - -#ifndef PNG_ZBUF_SIZE -#define PNG_ZBUF_SIZE 8192 -#endif - -/* If you are running on a machine where you cannot allocate more - * than 64K of memory at once, uncomment this. While libpng will not - * normally need that much memory in a chunk (unless you load up a very - * large file), zlib needs to know how big of a chunk it can use, and - * libpng thus makes sure to check any memory allocation to verify it - * will fit into memory. -#define PNG_MAX_MALLOC_64K - */ -#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) -#define PNG_MAX_MALLOC_64K -#endif - -/* This protects us against compilers that run on a windowing system - * and thus don't have or would rather us not use the stdio types: - * stdin, stdout, and stderr. The only one currently used is stderr - * in png_error() and png_warning(). #defining PNG_NO_STDIO will - * prevent these from being compiled and used. - * #define PNG_NO_STDIO - */ - -//#define PNG_NO_STDIO -#include - -/* This macro protects us against machines that don't have function - * prototypes (ie K&R style headers). If your compiler does not handle - * function prototypes, define this macro and use the included ansi2knr. - * I've always been able to use _NO_PROTO as the indicator, but you may - * need to drag the empty declaration out in front of here, or change the - * ifdef to suit your own needs. - */ -#ifndef PNGARG - -#ifdef OF /* zlib prototype munger */ -#define PNGARG(arglist) OF(arglist) -#else - -#ifdef _NO_PROTO -#define PNGARG(arglist) () -#else -#define PNGARG(arglist) arglist -#endif /* _NO_PROTO */ - -#endif /* OF */ - -#endif /* PNGARG */ - -/* Try to determine if we are compiling on a Mac. Note that testing for - * just __MWERKS__ is not good enough, because the Codewarrior is now used - * on non-Mac platforms. - */ -#ifndef MACOS -#if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ - defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) -#define MACOS -#endif -#endif - -/* enough people need this for various reasons to include it here */ -#if !defined(MACOS) && !defined(RISCOS) -#include -#endif - -/* This is an attempt to force a single setjmp behaviour on Linux. If - * the X config stuff didn't define _BSD_SOURCE we wouldn't need this. - */ -#ifdef __linux__ -#ifdef _BSD_SOURCE -#define _PNG_SAVE_BSD_SOURCE -#undef _BSD_SOURCE -#endif -#ifdef _SETJMP_H -__png.h__ already includes setjmp.h -__dont__ include it again -#endif -#endif /* __linux__ */ - -/* include setjmp.h for error handling */ -#include - -#ifdef __linux__ -#ifdef _PNG_SAVE_BSD_SOURCE -#define _BSD_SOURCE -#undef _PNG_SAVE_BSD_SOURCE -#endif -#endif /* __linux__ */ - -#ifdef BSD -#include -#else -#include -#endif - -/* Other defines for things like memory and the like can go here. */ -#ifdef PNG_INTERNAL -#include - -/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which - * aren't usually used outside the library (as far as I know), so it is - * debatable if they should be exported at all. In the future, when it is - * possible to have run-time registry of chunk-handling functions, some of - * these will be made available again. -#define PNG_EXTERN extern - */ -#define PNG_EXTERN - -/* Other defines specific to compilers can go here. Try to keep - * them inside an appropriate ifdef/endif pair for portability. - */ - -#if defined(MACOS) -/* We need to check that hasn't already been included earlier - * as it seems it doesn't agree with , yet we should really use - * if possible. - */ -#if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) -#include -#endif -#else -#include -#endif - -/* Codewarrior on NT has linking problems without this. */ -#if defined(__MWERKS__) && defined(WIN32) -#define PNG_ALWAYS_EXTERN -#endif - -/* For some reason, Borland C++ defines memcmp, etc. in mem.h, not - * stdlib.h like it should (I think). Or perhaps this is a C++ - * "feature"? - */ -#ifdef __TURBOC__ -#include -#include "alloc.h" -#endif - -#ifdef _MSC_VER -#include -#endif - -/* This controls how fine the dithering gets. As this allocates - * a largish chunk of memory (32K), those who are not as concerned - * with dithering quality can decrease some or all of these. - */ -#ifndef PNG_DITHER_RED_BITS -#define PNG_DITHER_RED_BITS 5 -#endif -#ifndef PNG_DITHER_GREEN_BITS -#define PNG_DITHER_GREEN_BITS 5 -#endif -#ifndef PNG_DITHER_BLUE_BITS -#define PNG_DITHER_BLUE_BITS 5 -#endif - -/* This controls how fine the gamma correction becomes when you - * are only interested in 8 bits anyway. Increasing this value - * results in more memory being used, and more pow() functions - * being called to fill in the gamma tables. Don't set this value - * less then 8, and even that may not work (I haven't tested it). - */ - -#ifndef PNG_MAX_GAMMA_8 -#define PNG_MAX_GAMMA_8 11 -#endif - -/* This controls how much a difference in gamma we can tolerate before - * we actually start doing gamma conversion. - */ -#ifndef PNG_GAMMA_THRESHOLD -#define PNG_GAMMA_THRESHOLD 0.05 -#endif - -#endif /* PNG_INTERNAL */ - -/* The following uses const char * instead of char * for error - * and warning message functions, so some compilers won't complain. - * If you do not want to use const, define PNG_NO_CONST here. - */ - -#ifndef PNG_NO_CONST -# define PNG_CONST const -#else -# define PNG_CONST -#endif - -/* The following defines give you the ability to remove code from the - * library that you will not be using. I wish I could figure out how to - * automate this, but I can't do that without making it seriously hard - * on the users. So if you are not using an ability, change the #define - * to and #undef, and that part of the library will not be compiled. If - * your linker can't find a function, you may want to make sure the - * ability is defined here. Some of these depend upon some others being - * defined. I haven't figured out all the interactions here, so you may - * have to experiment awhile to get everything to compile. If you are - * creating or using a shared library, you probably shouldn't touch this, - * as it will affect the size of the structures, and this will cause bad - * things to happen if the library and/or application ever change. - */ - -/* Any transformations you will not be using can be undef'ed here */ - -/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user - to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS - on the compile line, then pick and choose which ones to define without - having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED - if you only want to have a png-compliant reader/writer but don't need - any of the extra transformations. This saves about 80 kbytes in a - typical installation of the library. (PNG_NO_* form added in version - 1.0.1c, for consistency) - */ - - -#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_TRANSFORMS) -#define PNG_READ_TRANSFORMS_SUPPORTED -#endif -#ifdef PNG_READ_TRANSFORMS_SUPPORTED -#ifndef PNG_NO_READ_EXPAND -#define PNG_READ_EXPAND_SUPPORTED -#endif -#ifndef PNG_NO_READ_GAMMA -#define PNG_READ_GAMMA_SUPPORTED -#endif -#ifndef PNG_NO_READ_GRAY_TO_RGB -#define PNG_READ_GRAY_TO_RGB_SUPPORTED -#endif -#ifndef PNG_NO_READ_STRIP_ALPHA -#define PNG_READ_STRIP_ALPHA_SUPPORTED -#endif -#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ -#ifndef PNG_NO_READ_COMPOSITED_NODIV -#define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel and SGI */ -#endif -#define PNG_WRITE_INTERLACING_SUPPORTED - -#ifndef PNG_NO_STDIO -#define PNG_TIME_RFC1123_SUPPORTED -#endif - -/* Any chunks you are not interested in, you can undef here. The - * ones that allocate memory may be expecially important (hIST, - * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info - * a bit smaller. - */ - -#if !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ - !defined(PNG_NO_READ_ANCILLARY_CHUNKS) -#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED -#endif -#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED -#ifndef PNG_NO_READ_gAMA -#define PNG_READ_gAMA_SUPPORTED -#endif -#ifndef PNG_NO_READ_zTXt -#define PNG_READ_zTXt_SUPPORTED -#endif -#ifndef PNG_NO_READ_OPT_PLTE -#define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the optional */ -#endif /* PLTE chunk in RGB and RGBA images */ -#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */ - -/* need the time information for reading tIME chunks */ -#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED) -#include -#endif - -/* Some typedefs to get us started. These should be safe on most of the - * common platforms. The typedefs should be at least as large as the - * numbers suggest (a png_uint_32 must be at least 32 bits long), but they - * don't have to be exactly that size. Some compilers dislike passing - * unsigned shorts as function parameters, so you may be better off using - * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may - * want to have unsigned int for png_uint_32 instead of unsigned long. - */ - -typedef unsigned long png_uint_32; -typedef long png_int_32; -typedef unsigned short png_uint_16; -typedef short png_int_16; -typedef unsigned char png_byte; - -/* This is usually size_t. It is typedef'ed just in case you need it to - change (I'm not sure if you will or not, so I thought I'd be safe) */ -typedef size_t png_size_t; - -/* The following is needed for medium model support. It cannot be in the - * PNG_INTERNAL section. Needs modification for other compilers besides - * MSC. Model independent support declares all arrays and pointers to be - * large using the far keyword. The zlib version used must also support - * model independent data. As of version zlib 1.0.4, the necessary changes - * have been made in zlib. The USE_FAR_KEYWORD define triggers other - * changes that are needed. (Tim Wegner) - */ - -/* Separate compiler dependencies (problem here is that zlib.h always - defines FAR. (SJT) */ -#ifdef __BORLANDC__ -#if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) -#define LDATA 1 -#else -#define LDATA 0 -#endif - -#if !defined(__WIN32__) && !defined(__FLAT__) -#define PNG_MAX_MALLOC_64K -#if (LDATA != 1) -#ifndef FAR -#define FAR __far -#endif -#define USE_FAR_KEYWORD -#endif /* LDATA != 1 */ - -/* Possibly useful for moving data out of default segment. - * Uncomment it if you want. Could also define FARDATA as - * const if your compiler supports it. (SJT) -# define FARDATA FAR - */ -#endif /* __WIN32__, __FLAT__ */ - -#endif /* __BORLANDC__ */ - - -/* Suggest testing for specific compiler first before testing for - * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, - * making reliance oncertain keywords suspect. (SJT) - */ - -/* MSC Medium model */ -#if defined(FAR) -# if defined(M_I86MM) -# define USE_FAR_KEYWORD -# define FARDATA FAR -# include -# endif -#endif - -/* SJT: default case */ -#ifndef FAR -# define FAR -#endif - -/* At this point FAR is always defined */ -#ifndef FARDATA -#define FARDATA -#endif - -/* Add typedefs for pointers */ -typedef void FAR * png_voidp; -typedef png_byte FAR * png_bytep; -typedef png_uint_32 FAR * png_uint_32p; -typedef png_int_32 FAR * png_int_32p; -typedef png_uint_16 FAR * png_uint_16p; -typedef png_int_16 FAR * png_int_16p; -typedef PNG_CONST char FAR * png_const_charp; -typedef char FAR * png_charp; -typedef double FAR * png_doublep; - -/* Pointers to pointers; i.e. arrays */ -typedef png_byte FAR * FAR * png_bytepp; -typedef png_uint_32 FAR * FAR * png_uint_32pp; -typedef png_int_32 FAR * FAR * png_int_32pp; -typedef png_uint_16 FAR * FAR * png_uint_16pp; -typedef png_int_16 FAR * FAR * png_int_16pp; -typedef PNG_CONST char FAR * FAR * png_const_charpp; -typedef char FAR * FAR * png_charpp; -typedef double FAR * FAR * png_doublepp; - -/* Pointers to pointers to pointers; i.e. pointer to array */ -typedef char FAR * FAR * FAR * png_charppp; - -/* libpng typedefs for types in zlib. If zlib changes - * or another compression library is used, then change these. - * Eliminates need to change all the source files. - */ -typedef charf * png_zcharp; -typedef charf * FAR * png_zcharpp; -typedef z_stream FAR * png_zstreamp; - -/* allow for compilation as dll under MS Windows */ -#ifdef __WIN32DLL__ -#define PNG_EXPORT(type,symbol) __declspec(dllexport) type symbol -#endif - -/* allow for compilation as dll with BORLAND C++ 5.0 */ -#if defined(__BORLANDC__) && defined(_Windows) && defined(__DLL__) -# define PNG_EXPORT(type,symbol) type _export symbol -#endif - -/* allow for compilation as shared lib under BeOS */ -#ifdef __BEOSDLL__ -#define PNG_EXPORT(type,symbol) __declspec(export) type symbol -#endif - -#ifndef PNG_EXPORT -#define PNG_EXPORT(type,symbol) type symbol -#endif - - -/* User may want to use these so not in PNG_INTERNAL. Any library functions - * that are passed far data must be model independent. - */ - -#if defined(USE_FAR_KEYWORD) /* memory model independent fns */ -/* use this to make far-to-near assignments */ -# define CHECK 1 -# define NOCHECK 0 -# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) -# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) -# define png_strcpy _fstrcpy -# define png_strlen _fstrlen -# define png_memcmp _fmemcmp /* SJT: added */ -# define png_memcpy _fmemcpy -# define png_memset _fmemset -#else /* use the usual functions */ -# define CVT_PTR(ptr) (ptr) -# define CVT_PTR_NOCHECK(ptr) (ptr) -# define png_strcpy strcpy -# define png_strlen strlen -# define png_memcmp memcmp /* SJT: added */ -# define png_memcpy memcpy -# define png_memset memset -#endif -/* End of memory model independent support */ - -/* Just a double check that someone hasn't tried to define something - * contradictory. - */ -#if (PNG_ZBUF_SIZE > 65536) && defined(PNG_MAX_MALLOC_64K) -#undef PNG_ZBUF_SIZE -#define PNG_ZBUF_SIZE 65536 -#endif - -#endif /* PNGCONF_H */ - - + +/* pngconf.h - machine configurable file for libpng + * + * libpng version 1.5.7 - December 15, 2011 + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + */ + +/* Any machine specific code is near the front of this file, so if you + * are configuring libpng for a machine, you may want to read the section + * starting here down to where it starts to typedef png_color, png_text, + * and png_info. + */ + +#ifndef PNGCONF_H +#define PNGCONF_H + +#ifndef PNG_BUILDING_SYMBOL_TABLE +/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C + * definition file for machine specific limits, this may impact the + * correctness of the definitons below (see uses of INT_MAX). + */ +# ifndef PNG_NO_LIMITS_H +# include +# endif + +/* For the memory copy APIs (i.e. the standard definitions of these), + * because this file defines png_memcpy and so on the base APIs must + * be defined here. + */ +# ifdef BSD +# include +# else +# include +# endif + +/* For png_FILE_p - this provides the standard definition of a + * FILE + */ +# ifdef PNG_STDIO_SUPPORTED +# include +# endif +#endif + +/* This controls optimization of the reading of 16 and 32 bit values + * from PNG files. It can be set on a per-app-file basis - it + * just changes whether a macro is used to the function is called. + * The library builder sets the default, if read functions are not + * built into the library the macro implementation is forced on. + */ +#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED +# define PNG_USE_READ_MACROS +#endif +#if !defined(PNG_NO_USE_READ_MACROS) && !defined(PNG_USE_READ_MACROS) +# if PNG_DEFAULT_READ_MACROS +# define PNG_USE_READ_MACROS +# endif +#endif + +/* COMPILER SPECIFIC OPTIONS. + * + * These options are provided so that a variety of difficult compilers + * can be used. Some are fixed at build time (e.g. PNG_API_RULE + * below) but still have compiler specific implementations, others + * may be changed on a per-file basis when compiling against libpng. + */ + +/* The PNGARG macro protects us against machines that don't have function + * prototypes (ie K&R style headers). If your compiler does not handle + * function prototypes, define this macro and use the included ansi2knr. + * I've always been able to use _NO_PROTO as the indicator, but you may + * need to drag the empty declaration out in front of here, or change the + * ifdef to suit your own needs. + */ +#ifndef PNGARG + +# ifdef OF /* zlib prototype munger */ +# define PNGARG(arglist) OF(arglist) +# else + +# ifdef _NO_PROTO +# define PNGARG(arglist) () +# else +# define PNGARG(arglist) arglist +# endif /* _NO_PROTO */ + +# endif /* OF */ + +#endif /* PNGARG */ + +/* Function calling conventions. + * ============================= + * Normally it is not necessary to specify to the compiler how to call + * a function - it just does it - however on x86 systems derived from + * Microsoft and Borland C compilers ('IBM PC', 'DOS', 'Windows' systems + * and some others) there are multiple ways to call a function and the + * default can be changed on the compiler command line. For this reason + * libpng specifies the calling convention of every exported function and + * every function called via a user supplied function pointer. This is + * done in this file by defining the following macros: + * + * PNGAPI Calling convention for exported functions. + * PNGCBAPI Calling convention for user provided (callback) functions. + * PNGCAPI Calling convention used by the ANSI-C library (required + * for longjmp callbacks and sometimes used internally to + * specify the calling convention for zlib). + * + * These macros should never be overridden. If it is necessary to + * change calling convention in a private build this can be done + * by setting PNG_API_RULE (which defaults to 0) to one of the values + * below to select the correct 'API' variants. + * + * PNG_API_RULE=0 Use PNGCAPI - the 'C' calling convention - throughout. + * This is correct in every known environment. + * PNG_API_RULE=1 Use the operating system convention for PNGAPI and + * the 'C' calling convention (from PNGCAPI) for + * callbacks (PNGCBAPI). This is no longer required + * in any known environment - if it has to be used + * please post an explanation of the problem to the + * libpng mailing list. + * + * These cases only differ if the operating system does not use the C + * calling convention, at present this just means the above cases + * (x86 DOS/Windows sytems) and, even then, this does not apply to + * Cygwin running on those systems. + * + * Note that the value must be defined in pnglibconf.h so that what + * the application uses to call the library matches the conventions + * set when building the library. + */ + +/* Symbol export + * ============= + * When building a shared library it is almost always necessary to tell + * the compiler which symbols to export. The png.h macro 'PNG_EXPORT' + * is used to mark the symbols. On some systems these symbols can be + * extracted at link time and need no special processing by the compiler, + * on other systems the symbols are flagged by the compiler and just + * the declaration requires a special tag applied (unfortunately) in a + * compiler dependent way. Some systems can do either. + * + * A small number of older systems also require a symbol from a DLL to + * be flagged to the program that calls it. This is a problem because + * we do not know in the header file included by application code that + * the symbol will come from a shared library, as opposed to a statically + * linked one. For this reason the application must tell us by setting + * the magic flag PNG_USE_DLL to turn on the special processing before + * it includes png.h. + * + * Four additional macros are used to make this happen: + * + * PNG_IMPEXP The magic (if any) to cause a symbol to be exported from + * the build or imported if PNG_USE_DLL is set - compiler + * and system specific. + * + * PNG_EXPORT_TYPE(type) A macro that pre or appends PNG_IMPEXP to + * 'type', compiler specific. + * + * PNG_DLL_EXPORT Set to the magic to use during a libpng build to + * make a symbol exported from the DLL. Not used in the + * public header files; see pngpriv.h for how it is used + * in the libpng build. + * + * PNG_DLL_IMPORT Set to the magic to force the libpng symbols to come + * from a DLL - used to define PNG_IMPEXP when + * PNG_USE_DLL is set. + */ + +/* System specific discovery. + * ========================== + * This code is used at build time to find PNG_IMPEXP, the API settings + * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL + * import processing is possible. On Windows/x86 systems it also sets + * compiler-specific macros to the values required to change the calling + * conventions of the various functions. + */ +#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\ + defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\ + ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\ + defined(_M_X64) || defined(_M_IA64) ) + /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes + * builds under Cygwin or MinGW. Also includes Watcom builds but these need + * special treatment because they are not compatible with GCC or Visual C + * because of different calling conventions. + */ +# if PNG_API_RULE == 2 + /* If this line results in an error, either because __watcall is not + * understood or because of a redefine just below you cannot use *this* + * build of the library with the compiler you are using. *This* build was + * build using Watcom and applications must also be built using Watcom! + */ +# define PNGCAPI __watcall +# endif + +# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) +# define PNGCAPI __cdecl +# if PNG_API_RULE == 1 +# define PNGAPI __stdcall +# endif +# else + /* An older compiler, or one not detected (erroneously) above, + * if necessary override on the command line to get the correct + * variants for the compiler. + */ +# ifndef PNGCAPI +# define PNGCAPI _cdecl +# endif +# if PNG_API_RULE == 1 && !defined(PNGAPI) +# define PNGAPI _stdcall +# endif +# endif /* compiler/api */ + /* NOTE: PNGCBAPI always defaults to PNGCAPI. */ + +# if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD) + ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed +# endif + +# if (defined(_MSC_VER) && _MSC_VER < 800) ||\ + (defined(__BORLANDC__) && __BORLANDC__ < 0x500) + /* older Borland and MSC + * compilers used '__export' and required this to be after + * the type. + */ +# ifndef PNG_EXPORT_TYPE +# define PNG_EXPORT_TYPE(type) type PNG_IMPEXP +# endif +# define PNG_DLL_EXPORT __export +# else /* newer compiler */ +# define PNG_DLL_EXPORT __declspec(dllexport) +# ifndef PNG_DLL_IMPORT +# define PNG_DLL_IMPORT __declspec(dllimport) +# endif +# endif /* compiler */ + +#else /* !Windows/x86 */ +# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) +# define PNGAPI _System +# else /* !Windows/x86 && !OS/2 */ + /* Use the defaults, or define PNG*API on the command line (but + * this will have to be done for every compile!) + */ +# endif /* other system, !OS/2 */ +#endif /* !Windows/x86 */ + +/* Now do all the defaulting . */ +#ifndef PNGCAPI +# define PNGCAPI +#endif +#ifndef PNGCBAPI +# define PNGCBAPI PNGCAPI +#endif +#ifndef PNGAPI +# define PNGAPI PNGCAPI +#endif + +/* PNG_IMPEXP may be set on the compilation system command line or (if not set) + * then in an internal header file when building the library, otherwise (when + * using the library) it is set here. + */ +#ifndef PNG_IMPEXP +# if defined(PNG_USE_DLL) && defined(PNG_DLL_IMPORT) + /* This forces use of a DLL, disallowing static linking */ +# define PNG_IMPEXP PNG_DLL_IMPORT +# endif + +# ifndef PNG_IMPEXP +# define PNG_IMPEXP +# endif +#endif + +/* In 1.5.2 the definition of PNG_FUNCTION has been changed to always treat + * 'attributes' as a storage class - the attributes go at the start of the + * function definition, and attributes are always appended regardless of the + * compiler. This considerably simplifies these macros but may cause problems + * if any compilers both need function attributes and fail to handle them as + * a storage class (this is unlikely.) + */ +#ifndef PNG_FUNCTION +# define PNG_FUNCTION(type, name, args, attributes) attributes type name args +#endif + +#ifndef PNG_EXPORT_TYPE +# define PNG_EXPORT_TYPE(type) PNG_IMPEXP type +#endif + + /* The ordinal value is only relevant when preprocessing png.h for symbol + * table entries, so we discard it here. See the .dfn files in the + * scripts directory. + */ +#ifndef PNG_EXPORTA + +# define PNG_EXPORTA(ordinal, type, name, args, attributes)\ + PNG_FUNCTION(PNG_EXPORT_TYPE(type),(PNGAPI name),PNGARG(args), \ + extern attributes) +#endif + +/* ANSI-C (C90) does not permit a macro to be invoked with an empty argument, + * so make something non-empty to satisfy the requirement: + */ +#define PNG_EMPTY /*empty list*/ + +#define PNG_EXPORT(ordinal, type, name, args)\ + PNG_EXPORTA(ordinal, type, name, args, PNG_EMPTY) + +/* Use PNG_REMOVED to comment out a removed interface. */ +#ifndef PNG_REMOVED +# define PNG_REMOVED(ordinal, type, name, args, attributes) +#endif + +#ifndef PNG_CALLBACK +# define PNG_CALLBACK(type, name, args) type (PNGCBAPI name) PNGARG(args) +#endif + +/* Support for compiler specific function attributes. These are used + * so that where compiler support is available incorrect use of API + * functions in png.h will generate compiler warnings. + * + * Added at libpng-1.2.41. + */ + +#ifndef PNG_NO_PEDANTIC_WARNINGS +# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED +# define PNG_PEDANTIC_WARNINGS_SUPPORTED +# endif +#endif + +#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED + /* Support for compiler specific function attributes. These are used + * so that where compiler support is available incorrect use of API + * functions in png.h will generate compiler warnings. Added at libpng + * version 1.2.41. + */ +# if defined(__GNUC__) +# ifndef PNG_USE_RESULT +# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) +# endif +# ifndef PNG_NORETURN +# define PNG_NORETURN __attribute__((__noreturn__)) +# endif +# ifndef PNG_ALLOCATED +# define PNG_ALLOCATED __attribute__((__malloc__)) +# endif +# ifndef PNG_DEPRECATED +# define PNG_DEPRECATED __attribute__((__deprecated__)) +# endif +# ifndef PNG_PRIVATE +# if 0 /* Doesn't work so we use deprecated instead*/ +# define PNG_PRIVATE \ + __attribute__((warning("This function is not exported by libpng."))) +# else +# define PNG_PRIVATE \ + __attribute__((__deprecated__)) +# endif +# endif +# endif /* __GNUC__ */ + +# if defined(_MSC_VER) && (_MSC_VER >= 1300) +# ifndef PNG_USE_RESULT +# define PNG_USE_RESULT /* not supported */ +# endif +# ifndef PNG_NORETURN +# define PNG_NORETURN __declspec(noreturn) +# endif +# ifndef PNG_ALLOCATED +# if (_MSC_VER >= 1400) +# define PNG_ALLOCATED __declspec(restrict) +# endif +# endif +# ifndef PNG_DEPRECATED +# define PNG_DEPRECATED __declspec(deprecated) +# endif +# ifndef PNG_PRIVATE +# define PNG_PRIVATE __declspec(deprecated) +# endif +# endif /* _MSC_VER */ +#endif /* PNG_PEDANTIC_WARNINGS */ + +#ifndef PNG_DEPRECATED +# define PNG_DEPRECATED /* Use of this function is deprecated */ +#endif +#ifndef PNG_USE_RESULT +# define PNG_USE_RESULT /* The result of this function must be checked */ +#endif +#ifndef PNG_NORETURN +# define PNG_NORETURN /* This function does not return */ +#endif +#ifndef PNG_ALLOCATED +# define PNG_ALLOCATED /* The result of the function is new memory */ +#endif +#ifndef PNG_PRIVATE +# define PNG_PRIVATE /* This is a private libpng function */ +#endif +#ifndef PNG_FP_EXPORT /* A floating point API. */ +# ifdef PNG_FLOATING_POINT_SUPPORTED +# define PNG_FP_EXPORT(ordinal, type, name, args)\ + PNG_EXPORT(ordinal, type, name, args) +# else /* No floating point APIs */ +# define PNG_FP_EXPORT(ordinal, type, name, args) +# endif +#endif +#ifndef PNG_FIXED_EXPORT /* A fixed point API. */ +# ifdef PNG_FIXED_POINT_SUPPORTED +# define PNG_FIXED_EXPORT(ordinal, type, name, args)\ + PNG_EXPORT(ordinal, type, name, args) +# else /* No fixed point APIs */ +# define PNG_FIXED_EXPORT(ordinal, type, name, args) +# endif +#endif + +/* The following uses const char * instead of char * for error + * and warning message functions, so some compilers won't complain. + * If you do not want to use const, define PNG_NO_CONST here. + * + * This should not change how the APIs are called, so it can be done + * on a per-file basis in the application. + */ +#ifndef PNG_CONST +# ifndef PNG_NO_CONST +# define PNG_CONST const +# else +# define PNG_CONST +# endif +#endif + +/* Some typedefs to get us started. These should be safe on most of the + * common platforms. The typedefs should be at least as large as the + * numbers suggest (a png_uint_32 must be at least 32 bits long), but they + * don't have to be exactly that size. Some compilers dislike passing + * unsigned shorts as function parameters, so you may be better off using + * unsigned int for png_uint_16. + */ + +#if defined(INT_MAX) && (INT_MAX > 0x7ffffffeL) +typedef unsigned int png_uint_32; +typedef int png_int_32; +#else +typedef unsigned long png_uint_32; +typedef long png_int_32; +#endif +typedef unsigned short png_uint_16; +typedef short png_int_16; +typedef unsigned char png_byte; + +#ifdef PNG_NO_SIZE_T +typedef unsigned int png_size_t; +#else +typedef size_t png_size_t; +#endif +#define png_sizeof(x) (sizeof (x)) + +/* The following is needed for medium model support. It cannot be in the + * pngpriv.h header. Needs modification for other compilers besides + * MSC. Model independent support declares all arrays and pointers to be + * large using the far keyword. The zlib version used must also support + * model independent data. As of version zlib 1.0.4, the necessary changes + * have been made in zlib. The USE_FAR_KEYWORD define triggers other + * changes that are needed. (Tim Wegner) + */ + +/* Separate compiler dependencies (problem here is that zlib.h always + * defines FAR. (SJT) + */ +#ifdef __BORLANDC__ +# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) +# define LDATA 1 +# else +# define LDATA 0 +# endif + /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ +# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) +# define PNG_MAX_MALLOC_64K /* only used in build */ +# if (LDATA != 1) +# ifndef FAR +# define FAR __far +# endif +# define USE_FAR_KEYWORD +# endif /* LDATA != 1 */ + /* Possibly useful for moving data out of default segment. + * Uncomment it if you want. Could also define FARDATA as + * const if your compiler supports it. (SJT) +# define FARDATA FAR + */ +# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ +#endif /* __BORLANDC__ */ + + +/* Suggest testing for specific compiler first before testing for + * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, + * making reliance oncertain keywords suspect. (SJT) + */ + +/* MSC Medium model */ +#ifdef FAR +# ifdef M_I86MM +# define USE_FAR_KEYWORD +# define FARDATA FAR +# include +# endif +#endif + +/* SJT: default case */ +#ifndef FAR +# define FAR +#endif + +/* At this point FAR is always defined */ +#ifndef FARDATA +# define FARDATA +#endif + +/* Typedef for floating-point numbers that are converted + * to fixed-point with a multiple of 100,000, e.g., gamma + */ +typedef png_int_32 png_fixed_point; + +/* Add typedefs for pointers */ +typedef void FAR * png_voidp; +typedef PNG_CONST void FAR * png_const_voidp; +typedef png_byte FAR * png_bytep; +typedef PNG_CONST png_byte FAR * png_const_bytep; +typedef png_uint_32 FAR * png_uint_32p; +typedef PNG_CONST png_uint_32 FAR * png_const_uint_32p; +typedef png_int_32 FAR * png_int_32p; +typedef PNG_CONST png_int_32 FAR * png_const_int_32p; +typedef png_uint_16 FAR * png_uint_16p; +typedef PNG_CONST png_uint_16 FAR * png_const_uint_16p; +typedef png_int_16 FAR * png_int_16p; +typedef PNG_CONST png_int_16 FAR * png_const_int_16p; +typedef char FAR * png_charp; +typedef PNG_CONST char FAR * png_const_charp; +typedef png_fixed_point FAR * png_fixed_point_p; +typedef PNG_CONST png_fixed_point FAR * png_const_fixed_point_p; +typedef png_size_t FAR * png_size_tp; +typedef PNG_CONST png_size_t FAR * png_const_size_tp; + +#ifdef PNG_STDIO_SUPPORTED +typedef FILE * png_FILE_p; +#endif + +#ifdef PNG_FLOATING_POINT_SUPPORTED +typedef double FAR * png_doublep; +typedef PNG_CONST double FAR * png_const_doublep; +#endif + +/* Pointers to pointers; i.e. arrays */ +typedef png_byte FAR * FAR * png_bytepp; +typedef png_uint_32 FAR * FAR * png_uint_32pp; +typedef png_int_32 FAR * FAR * png_int_32pp; +typedef png_uint_16 FAR * FAR * png_uint_16pp; +typedef png_int_16 FAR * FAR * png_int_16pp; +typedef PNG_CONST char FAR * FAR * png_const_charpp; +typedef char FAR * FAR * png_charpp; +typedef png_fixed_point FAR * FAR * png_fixed_point_pp; +#ifdef PNG_FLOATING_POINT_SUPPORTED +typedef double FAR * FAR * png_doublepp; +#endif + +/* Pointers to pointers to pointers; i.e., pointer to array */ +typedef char FAR * FAR * FAR * png_charppp; + +/* png_alloc_size_t is guaranteed to be no smaller than png_size_t, + * and no smaller than png_uint_32. Casts from png_size_t or png_uint_32 + * to png_alloc_size_t are not necessary; in fact, it is recommended + * not to use them at all so that the compiler can complain when something + * turns out to be problematic. + * Casts in the other direction (from png_alloc_size_t to png_size_t or + * png_uint_32) should be explicitly applied; however, we do not expect + * to encounter practical situations that require such conversions. + */ +#if defined(__TURBOC__) && !defined(__FLAT__) + typedef unsigned long png_alloc_size_t; +#else +# if defined(_MSC_VER) && defined(MAXSEG_64K) + typedef unsigned long png_alloc_size_t; +# else + /* This is an attempt to detect an old Windows system where (int) is + * actually 16 bits, in that case png_malloc must have an argument with a + * bigger size to accomodate the requirements of the library. + */ +# if (defined(_Windows) || defined(_WINDOWS) || defined(_WINDOWS_)) && \ + (!defined(INT_MAX) || INT_MAX <= 0x7ffffffeL) + typedef DWORD png_alloc_size_t; +# else + typedef png_size_t png_alloc_size_t; +# endif +# endif +#endif + +#endif /* PNGCONF_H */ diff --git a/ExternalLibs/glpng/png/pngdebug.h b/ExternalLibs/glpng/png/pngdebug.h new file mode 100644 index 0000000..96c1ea4 --- /dev/null +++ b/ExternalLibs/glpng/png/pngdebug.h @@ -0,0 +1,157 @@ + +/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.0 [January 6, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* Define PNG_DEBUG at compile time for debugging information. Higher + * numbers for PNG_DEBUG mean more debugging information. This has + * only been added since version 0.95 so it is not implemented throughout + * libpng yet, but more support will be added as needed. + * + * png_debug[1-2]?(level, message ,arg{0-2}) + * Expands to a statement (either a simple expression or a compound + * do..while(0) statement) that outputs a message with parameter + * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG + * is undefined, 0 or 1 every png_debug expands to a simple expression + * (actually ((void)0)). + * + * level: level of detail of message, starting at 0. A level 'n' + * message is preceded by 'n' tab characters (not implemented + * on Microsoft compilers unless PNG_DEBUG_FILE is also + * defined, to allow debug DLL compilation with no standard IO). + * message: a printf(3) style text string. A trailing '\n' is added + * to the message. + * arg: 0 to 2 arguments for printf(3) style substitution in message. + */ +#ifndef PNGDEBUG_H +#define PNGDEBUG_H +/* These settings control the formatting of messages in png.c and pngerror.c */ +/* Moved to pngdebug.h at 1.5.0 */ +# ifndef PNG_LITERAL_SHARP +# define PNG_LITERAL_SHARP 0x23 +# endif +# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET +# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b +# endif +# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET +# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d +# endif +# ifndef PNG_STRING_NEWLINE +# define PNG_STRING_NEWLINE "\n" +# endif + +#ifdef PNG_DEBUG +# if (PNG_DEBUG > 0) +# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) +# include +# if (PNG_DEBUG > 1) +# ifndef _DEBUG +# define _DEBUG +# endif +# ifndef png_debug +# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) +# endif +# endif +# else /* PNG_DEBUG_FILE || !_MSC_VER */ +# ifndef PNG_STDIO_SUPPORTED +# include /* not included yet */ +# endif +# ifndef PNG_DEBUG_FILE +# define PNG_DEBUG_FILE stderr +# endif /* PNG_DEBUG_FILE */ + +# if (PNG_DEBUG > 1) +/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on + * non-ISO compilers + */ +# ifdef __STDC__ +# ifndef png_debug +# define png_debug(l,m) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ + } while (0) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ + } while (0) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + do { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ + } while (0) +# endif +# else /* __STDC __ */ +# ifndef png_debug +# define png_debug(l,m) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format); \ + } while (0) +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1); \ + } while (0) +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + do { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1,p2); \ + } while (0) +# endif +# endif /* __STDC __ */ +# endif /* (PNG_DEBUG > 1) */ + +# endif /* _MSC_VER */ +# endif /* (PNG_DEBUG > 0) */ +#endif /* PNG_DEBUG */ +#ifndef png_debug +# define png_debug(l, m) ((void)0) +#endif +#ifndef png_debug1 +# define png_debug1(l, m, p1) ((void)0) +#endif +#ifndef png_debug2 +# define png_debug2(l, m, p1, p2) ((void)0) +#endif +#endif /* PNGDEBUG_H */ diff --git a/ExternalLibs/glpng/png/pngerror.c b/ExternalLibs/glpng/png/pngerror.c index c8b3b9b..6494a0c 100644 --- a/ExternalLibs/glpng/png/pngerror.c +++ b/ExternalLibs/glpng/png/pngerror.c @@ -1,160 +1,676 @@ - -/* pngerror.c - stub functions for i/o and memory allocation - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file provides a location for all error handling. Users who - * need special error handling are expected to write replacement functions - * and use png_set_error_fn() to use those functions. See the instructions - * at each function. - */ - -#define PNG_INTERNAL -#include "png.h" - -static void png_default_error PNGARG((png_structp png_ptr, - png_const_charp message)); -static void png_default_warning PNGARG((png_structp png_ptr, - png_const_charp message)); - -/* This function is called whenever there is a fatal error. This function - * should not be changed. If there is a need to handle errors differently, - * you should supply a replacement error function and use png_set_error_fn() - * to replace the error function at run-time. - */ -void -png_error(png_structp png_ptr, png_const_charp message) -{ - if (png_ptr->error_fn != NULL) - (*(png_ptr->error_fn))(png_ptr, message); - - /* if the following returns or doesn't exist, use the default function, - which will not return */ - png_default_error(png_ptr, message); -} - -/* This function is called whenever there is a non-fatal error. This function - * should not be changed. If there is a need to handle warnings differently, - * you should supply a replacement warning function and use - * png_set_error_fn() to replace the warning function at run-time. - */ -void -png_warning(png_structp png_ptr, png_const_charp message) -{ - if (png_ptr->warning_fn != NULL) - (*(png_ptr->warning_fn))(png_ptr, message); - else - png_default_warning(png_ptr, message); -} - -/* These utilities are used internally to build an error message that relates - * to the current chunk. The chunk name comes from png_ptr->chunk_name, - * this is used to prefix the message. The message is limited in length - * to 63 bytes, the name characters are output as hex digits wrapped in [] - * if the character is invalid. - */ -#define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97)) -static PNG_CONST char png_digit[16] = { - '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' -}; - -static void -png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp message) -{ - int iout = 0, iin = 0; - - while (iin < 4) { - int c = png_ptr->chunk_name[iin++]; - if (isnonalpha(c)) { - buffer[iout++] = '['; - buffer[iout++] = png_digit[(c & 0xf0) >> 4]; - buffer[iout++] = png_digit[c & 0xf]; - buffer[iout++] = ']'; - } else { - buffer[iout++] = c; - } - } - - if (message == NULL) - buffer[iout] = 0; - else { - buffer[iout++] = ':'; - buffer[iout++] = ' '; - png_memcpy(buffer+iout, message, 64); - buffer[iout+63] = 0; - } -} - -void -png_chunk_error(png_structp png_ptr, png_const_charp message) -{ - char msg[16+64]; - png_format_buffer(png_ptr, msg, message); - png_error(png_ptr, msg); -} - -void -png_chunk_warning(png_structp png_ptr, png_const_charp message) -{ - char msg[16+64]; - png_format_buffer(png_ptr, msg, message); - png_warning(png_ptr, msg); -} - -/* This is the default error handling function. Note that replacements for - * this function MUST NOT RETURN, or the program will likely crash. This - * function is used by default, or if the program supplies NULL for the - * error function pointer in png_set_error_fn(). - */ -static void -png_default_error(png_structp png_ptr, png_const_charp message) -{ -#ifndef PNG_NO_STDIO - fprintf(stderr, "libpng error: %s\n", message); -#endif - -#ifdef USE_FAR_KEYWORD - { - jmp_buf jmpbuf; - png_memcpy(jmpbuf,png_ptr->jmpbuf,sizeof(jmp_buf)); - longjmp(jmpbuf, 1); - } -#else - longjmp(png_ptr->jmpbuf, 1); -#endif -} - -/* This function is called when there is a warning, but the library thinks - * it can continue anyway. Replacement functions don't have to do anything - * here if you don't want them to. In the default configuration, png_ptr is - * not used, but it is passed in case it may be useful. - */ -static void -png_default_warning(png_structp png_ptr, png_const_charp message) -{ - if (png_ptr == NULL) - return; - -#ifndef PNG_NO_STDIO - fprintf(stderr, "libpng warning: %s\n", message); -#endif -} - -/* This function is called when the application wants to use another method - * of handling errors and warnings. Note that the error function MUST NOT - * return to the calling routine or serious problems will occur. The return - * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1) - */ -void -png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn) -{ - png_ptr->error_ptr = error_ptr; - png_ptr->error_fn = error_fn; - png_ptr->warning_fn = warning_fn; -} - + +/* pngerror.c - stub functions for i/o and memory allocation + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file provides a location for all error handling. Users who + * need special error handling are expected to write replacement functions + * and use png_set_error_fn() to use those functions. See the instructions + * at each function. + */ + +#include "pngpriv.h" + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +static PNG_FUNCTION(void, png_default_error,PNGARG((png_structp png_ptr, + png_const_charp error_message)),PNG_NORETURN); + +#ifdef PNG_WARNINGS_SUPPORTED +static void /* PRIVATE */ +png_default_warning PNGARG((png_structp png_ptr, + png_const_charp warning_message)); +#endif /* PNG_WARNINGS_SUPPORTED */ + +/* This function is called whenever there is a fatal error. This function + * should not be changed. If there is a need to handle errors differently, + * you should supply a replacement error function and use png_set_error_fn() + * to replace the error function at run-time. + */ +#ifdef PNG_ERROR_TEXT_SUPPORTED +PNG_FUNCTION(void,PNGAPI +png_error,(png_structp png_ptr, png_const_charp error_message),PNG_NORETURN) +{ +#ifdef PNG_ERROR_NUMBERS_SUPPORTED + char msg[16]; + if (png_ptr != NULL) + { + if (png_ptr->flags& + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) + { + if (*error_message == PNG_LITERAL_SHARP) + { + /* Strip "#nnnn " from beginning of error message. */ + int offset; + for (offset = 1; offset<15; offset++) + if (error_message[offset] == ' ') + break; + + if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + { + int i; + for (i = 0; i < offset - 1; i++) + msg[i] = error_message[i + 1]; + msg[i - 1] = '\0'; + error_message = msg; + } + + else + error_message += offset; + } + + else + { + if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT) + { + msg[0] = '0'; + msg[1] = '\0'; + error_message = msg; + } + } + } + } +#endif + if (png_ptr != NULL && png_ptr->error_fn != NULL) + (*(png_ptr->error_fn))(png_ptr, error_message); + + /* If the custom handler doesn't exist, or if it returns, + use the default handler, which will not return. */ + png_default_error(png_ptr, error_message); +} +#else +PNG_FUNCTION(void,PNGAPI +png_err,(png_structp png_ptr),PNG_NORETURN) +{ + /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed + * erroneously as '\0', instead of the empty string "". This was + * apparently an error, introduced in libpng-1.2.20, and png_default_error + * will crash in this case. + */ + if (png_ptr != NULL && png_ptr->error_fn != NULL) + (*(png_ptr->error_fn))(png_ptr, ""); + + /* If the custom handler doesn't exist, or if it returns, + use the default handler, which will not return. */ + png_default_error(png_ptr, ""); +} +#endif /* PNG_ERROR_TEXT_SUPPORTED */ + +/* Utility to safely appends strings to a buffer. This never errors out so + * error checking is not required in the caller. + */ +size_t +png_safecat(png_charp buffer, size_t bufsize, size_t pos, + png_const_charp string) +{ + if (buffer != NULL && pos < bufsize) + { + if (string != NULL) + while (*string != '\0' && pos < bufsize-1) + buffer[pos++] = *string++; + + buffer[pos] = '\0'; + } + + return pos; +} + +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) +/* Utility to dump an unsigned value into a buffer, given a start pointer and + * and end pointer (which should point just *beyond* the end of the buffer!) + * Returns the pointer to the start of the formatted string. + */ +png_charp +png_format_number(png_const_charp start, png_charp end, int format, + png_alloc_size_t number) +{ + int count = 0; /* number of digits output */ + int mincount = 1; /* minimum number required */ + int output = 0; /* digit output (for the fixed point format) */ + + *--end = '\0'; + + /* This is written so that the loop always runs at least once, even with + * number zero. + */ + while (end > start && (number != 0 || count < mincount)) + { + + static const char digits[] = "0123456789ABCDEF"; + + switch (format) + { + case PNG_NUMBER_FORMAT_fixed: + /* Needs five digits (the fraction) */ + mincount = 5; + if (output || number % 10 != 0) + { + *--end = digits[number % 10]; + output = 1; + } + number /= 10; + break; + + case PNG_NUMBER_FORMAT_02u: + /* Expects at least 2 digits. */ + mincount = 2; + /* fall through */ + + case PNG_NUMBER_FORMAT_u: + *--end = digits[number % 10]; + number /= 10; + break; + + case PNG_NUMBER_FORMAT_02x: + /* This format expects at least two digits */ + mincount = 2; + /* fall through */ + + case PNG_NUMBER_FORMAT_x: + *--end = digits[number & 0xf]; + number >>= 4; + break; + + default: /* an error */ + number = 0; + break; + } + + /* Keep track of the number of digits added */ + ++count; + + /* Float a fixed number here: */ + if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start) + { + /* End of the fraction, but maybe nothing was output? In that case + * drop the decimal point. If the number is a true zero handle that + * here. + */ + if (output) + *--end = '.'; + else if (number == 0) /* and !output */ + *--end = '0'; + } + } + + return end; +} +#endif + +#ifdef PNG_WARNINGS_SUPPORTED +/* This function is called whenever there is a non-fatal error. This function + * should not be changed. If there is a need to handle warnings differently, + * you should supply a replacement warning function and use + * png_set_error_fn() to replace the warning function at run-time. + */ +void PNGAPI +png_warning(png_structp png_ptr, png_const_charp warning_message) +{ + int offset = 0; + if (png_ptr != NULL) + { +#ifdef PNG_ERROR_NUMBERS_SUPPORTED + if (png_ptr->flags& + (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT)) +#endif + { + if (*warning_message == PNG_LITERAL_SHARP) + { + for (offset = 1; offset < 15; offset++) + if (warning_message[offset] == ' ') + break; + } + } + } + if (png_ptr != NULL && png_ptr->warning_fn != NULL) + (*(png_ptr->warning_fn))(png_ptr, warning_message + offset); + else + png_default_warning(png_ptr, warning_message + offset); +} + +/* These functions support 'formatted' warning messages with up to + * PNG_WARNING_PARAMETER_COUNT parameters. In the format string the parameter + * is introduced by @, where 'number' starts at 1. This follows the + * standard established by X/Open for internationalizable error messages. + */ +void +png_warning_parameter(png_warning_parameters p, int number, + png_const_charp string) +{ + if (number > 0 && number <= PNG_WARNING_PARAMETER_COUNT) + (void)png_safecat(p[number-1], (sizeof p[number-1]), 0, string); +} + +void +png_warning_parameter_unsigned(png_warning_parameters p, int number, int format, + png_alloc_size_t value) +{ + char buffer[PNG_NUMBER_BUFFER_SIZE]; + png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value)); +} + +void +png_warning_parameter_signed(png_warning_parameters p, int number, int format, + png_int_32 value) +{ + png_alloc_size_t u; + png_charp str; + char buffer[PNG_NUMBER_BUFFER_SIZE]; + + /* Avoid overflow by doing the negate in a png_alloc_size_t: */ + u = (png_alloc_size_t)value; + if (value < 0) + u = ~u + 1; + + str = PNG_FORMAT_NUMBER(buffer, format, u); + + if (value < 0 && str > buffer) + *--str = '-'; + + png_warning_parameter(p, number, str); +} + +void +png_formatted_warning(png_structp png_ptr, png_warning_parameters p, + png_const_charp message) +{ + /* The internal buffer is just 128 bytes - enough for all our messages, + * overflow doesn't happen because this code checks! + */ + size_t i; + char msg[128]; + + for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i) + { + if (*message == '@') + { + int parameter = -1; + switch (*++message) + { + case '1': + parameter = 0; + break; + + case '2': + parameter = 1; + break; + + case '\0': + continue; /* To break out of the for loop above. */ + + default: + break; + } + + if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT) + { + /* Append this parameter */ + png_const_charp parm = p[parameter]; + png_const_charp pend = p[parameter] + (sizeof p[parameter]); + + /* No need to copy the trailing '\0' here, but there is no guarantee + * that parm[] has been initialized, so there is no guarantee of a + * trailing '\0': + */ + for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i) + msg[i] = *parm++; + + ++message; + continue; + } + + /* else not a parameter and there is a character after the @ sign; just + * copy that. + */ + } + + /* At this point *message can't be '\0', even in the bad parameter case + * above where there is a lone '@' at the end of the message string. + */ + msg[i] = *message++; + } + + /* i is always less than (sizeof msg), so: */ + msg[i] = '\0'; + + /* And this is the formatted message: */ + png_warning(png_ptr, msg); +} +#endif /* PNG_WARNINGS_SUPPORTED */ + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +void PNGAPI +png_benign_error(png_structp png_ptr, png_const_charp error_message) +{ + if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + png_warning(png_ptr, error_message); + else + png_error(png_ptr, error_message); +} +#endif + +/* These utilities are used internally to build an error message that relates + * to the current chunk. The chunk name comes from png_ptr->chunk_name, + * this is used to prefix the message. The message is limited in length + * to 63 bytes, the name characters are output as hex digits wrapped in [] + * if the character is invalid. + */ +#define isnonalpha(c) ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) +static PNG_CONST char png_digit[16] = { + '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', + 'A', 'B', 'C', 'D', 'E', 'F' +}; + +#define PNG_MAX_ERROR_TEXT 64 +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED) +static void /* PRIVATE */ +png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp + error_message) +{ + png_uint_32 chunk_name = png_ptr->chunk_name; + int iout = 0, ishift = 24; + + while (ishift >= 0) + { + int c = (int)(chunk_name >> ishift) & 0xff; + + ishift -= 8; + if (isnonalpha(c)) + { + buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET; + buffer[iout++] = png_digit[(c & 0xf0) >> 4]; + buffer[iout++] = png_digit[c & 0x0f]; + buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET; + } + + else + { + buffer[iout++] = (char)c; + } + } + + if (error_message == NULL) + buffer[iout] = '\0'; + + else + { + int iin = 0; + + buffer[iout++] = ':'; + buffer[iout++] = ' '; + + while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0') + buffer[iout++] = error_message[iin++]; + + /* iin < PNG_MAX_ERROR_TEXT, so the following is safe: */ + buffer[iout] = '\0'; + } +} +#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */ + +#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) +PNG_FUNCTION(void,PNGAPI +png_chunk_error,(png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN) +{ + char msg[18+PNG_MAX_ERROR_TEXT]; + if (png_ptr == NULL) + png_error(png_ptr, error_message); + + else + { + png_format_buffer(png_ptr, msg, error_message); + png_error(png_ptr, msg); + } +} +#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */ + +#ifdef PNG_WARNINGS_SUPPORTED +void PNGAPI +png_chunk_warning(png_structp png_ptr, png_const_charp warning_message) +{ + char msg[18+PNG_MAX_ERROR_TEXT]; + if (png_ptr == NULL) + png_warning(png_ptr, warning_message); + + else + { + png_format_buffer(png_ptr, msg, warning_message); + png_warning(png_ptr, msg); + } +} +#endif /* PNG_WARNINGS_SUPPORTED */ + +#ifdef PNG_READ_SUPPORTED +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +void PNGAPI +png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message) +{ + if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN) + png_chunk_warning(png_ptr, error_message); + + else + png_chunk_error(png_ptr, error_message); +} +#endif +#endif /* PNG_READ_SUPPORTED */ + +#ifdef PNG_ERROR_TEXT_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_FUNCTION(void, +png_fixed_error,(png_structp png_ptr, png_const_charp name),PNG_NORETURN) +{ +# define fixed_message "fixed point overflow in " +# define fixed_message_ln ((sizeof fixed_message)-1) + int iin; + char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT]; + png_memcpy(msg, fixed_message, fixed_message_ln); + iin = 0; + if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0) + { + msg[fixed_message_ln + iin] = name[iin]; + ++iin; + } + msg[fixed_message_ln + iin] = 0; + png_error(png_ptr, msg); +} +#endif +#endif + +#ifdef PNG_SETJMP_SUPPORTED +/* This API only exists if ANSI-C style error handling is used, + * otherwise it is necessary for png_default_error to be overridden. + */ +jmp_buf* PNGAPI +png_set_longjmp_fn(png_structp png_ptr, png_longjmp_ptr longjmp_fn, + size_t jmp_buf_size) +{ + if (png_ptr == NULL || jmp_buf_size != png_sizeof(jmp_buf)) + return NULL; + + png_ptr->longjmp_fn = longjmp_fn; + return &png_ptr->longjmp_buffer; +} +#endif + +/* This is the default error handling function. Note that replacements for + * this function MUST NOT RETURN, or the program will likely crash. This + * function is used by default, or if the program supplies NULL for the + * error function pointer in png_set_error_fn(). + */ +static PNG_FUNCTION(void /* PRIVATE */, +png_default_error,(png_structp png_ptr, png_const_charp error_message), + PNG_NORETURN) +{ +#ifdef PNG_CONSOLE_IO_SUPPORTED +#ifdef PNG_ERROR_NUMBERS_SUPPORTED + /* Check on NULL only added in 1.5.4 */ + if (error_message != NULL && *error_message == PNG_LITERAL_SHARP) + { + /* Strip "#nnnn " from beginning of error message. */ + int offset; + char error_number[16]; + for (offset = 0; offset<15; offset++) + { + error_number[offset] = error_message[offset + 1]; + if (error_message[offset] == ' ') + break; + } + + if ((offset > 1) && (offset < 15)) + { + error_number[offset - 1] = '\0'; + fprintf(stderr, "libpng error no. %s: %s", + error_number, error_message + offset + 1); + fprintf(stderr, PNG_STRING_NEWLINE); + } + + else + { + fprintf(stderr, "libpng error: %s, offset=%d", + error_message, offset); + fprintf(stderr, PNG_STRING_NEWLINE); + } + } + else +#endif + { + fprintf(stderr, "libpng error: %s", error_message ? error_message : + "undefined"); + fprintf(stderr, PNG_STRING_NEWLINE); + } +#else + PNG_UNUSED(error_message) /* Make compiler happy */ +#endif + png_longjmp(png_ptr, 1); +} + +PNG_FUNCTION(void,PNGAPI +png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN) +{ +#ifdef PNG_SETJMP_SUPPORTED + if (png_ptr && png_ptr->longjmp_fn) + { +# ifdef USE_FAR_KEYWORD + { + jmp_buf tmp_jmpbuf; + png_memcpy(tmp_jmpbuf, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); + png_ptr->longjmp_fn(tmp_jmpbuf, val); + } + +# else + png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val); +# endif + } +#endif + /* Here if not setjmp support or if png_ptr is null. */ + PNG_ABORT(); +} + +#ifdef PNG_WARNINGS_SUPPORTED +/* This function is called when there is a warning, but the library thinks + * it can continue anyway. Replacement functions don't have to do anything + * here if you don't want them to. In the default configuration, png_ptr is + * not used, but it is passed in case it may be useful. + */ +static void /* PRIVATE */ +png_default_warning(png_structp png_ptr, png_const_charp warning_message) +{ +#ifdef PNG_CONSOLE_IO_SUPPORTED +# ifdef PNG_ERROR_NUMBERS_SUPPORTED + if (*warning_message == PNG_LITERAL_SHARP) + { + int offset; + char warning_number[16]; + for (offset = 0; offset < 15; offset++) + { + warning_number[offset] = warning_message[offset + 1]; + if (warning_message[offset] == ' ') + break; + } + + if ((offset > 1) && (offset < 15)) + { + warning_number[offset + 1] = '\0'; + fprintf(stderr, "libpng warning no. %s: %s", + warning_number, warning_message + offset); + fprintf(stderr, PNG_STRING_NEWLINE); + } + + else + { + fprintf(stderr, "libpng warning: %s", + warning_message); + fprintf(stderr, PNG_STRING_NEWLINE); + } + } + else +# endif + + { + fprintf(stderr, "libpng warning: %s", warning_message); + fprintf(stderr, PNG_STRING_NEWLINE); + } +#else + PNG_UNUSED(warning_message) /* Make compiler happy */ +#endif + PNG_UNUSED(png_ptr) /* Make compiler happy */ +} +#endif /* PNG_WARNINGS_SUPPORTED */ + +/* This function is called when the application wants to use another method + * of handling errors and warnings. Note that the error function MUST NOT + * return to the calling routine or serious problems will occur. The return + * method used in the default routine calls longjmp(png_ptr->longjmp_buffer, 1) + */ +void PNGAPI +png_set_error_fn(png_structp png_ptr, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warning_fn) +{ + if (png_ptr == NULL) + return; + + png_ptr->error_ptr = error_ptr; + png_ptr->error_fn = error_fn; +#ifdef PNG_WARNINGS_SUPPORTED + png_ptr->warning_fn = warning_fn; +#else + PNG_UNUSED(warning_fn) +#endif +} + + +/* This function returns a pointer to the error_ptr associated with the user + * functions. The application should free any memory associated with this + * pointer before png_write_destroy and png_read_destroy are called. + */ +png_voidp PNGAPI +png_get_error_ptr(png_const_structp png_ptr) +{ + if (png_ptr == NULL) + return NULL; + + return ((png_voidp)png_ptr->error_ptr); +} + + +#ifdef PNG_ERROR_NUMBERS_SUPPORTED +void PNGAPI +png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode) +{ + if (png_ptr != NULL) + { + png_ptr->flags &= + ((~(PNG_FLAG_STRIP_ERROR_NUMBERS | + PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode); + } +} +#endif +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngget.c b/ExternalLibs/glpng/png/pngget.c index e82c010..1889e99 100644 --- a/ExternalLibs/glpng/png/pngget.c +++ b/ExternalLibs/glpng/png/pngget.c @@ -1,553 +1,1124 @@ - -/* pngget.c - retrieval of values from info struct - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - */ - -#define PNG_INTERNAL -#include "png.h" - -png_uint_32 -png_get_rowbytes(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - return(info_ptr->rowbytes); - else - return(0); -} - -#ifdef PNG_EASY_ACCESS_SUPPORTED -/* easy access to info, added in libpng-0.99 */ -png_uint_32 -png_get_image_width(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->width; - } - return (0); -} - -png_uint_32 -png_get_image_height(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->height; - } - return (0); -} - -png_byte -png_get_bit_depth(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->bit_depth; - } - return (0); -} - -png_byte -png_get_color_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->color_type; - } - return (0); -} - -png_byte -png_get_filter_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->filter_type; - } - return (0); -} - -png_byte -png_get_interlace_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->interlace_type; - } - return (0); -} - -png_byte -png_get_compression_type(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr != NULL && info_ptr != NULL) - { - return info_ptr->compression_type; - } - return (0); -} - -png_uint_32 -png_get_x_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "png_get_x_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); - else return (info_ptr->x_pixels_per_unit); - } - else -#endif - return (0); -} - -png_uint_32 -png_get_y_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "png_get_y_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER) - return (0); - else return (info_ptr->y_pixels_per_unit); - } - else -#endif - return (0); -} - -png_uint_32 -png_get_pixels_per_meter(png_structp png_ptr, png_infop info_ptr) -{ -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "png_get_pixels_per_meter"); - if(info_ptr->phys_unit_type != PNG_RESOLUTION_METER || - info_ptr->x_pixels_per_unit != info_ptr->y_pixels_per_unit) - return (0); - else return (info_ptr->x_pixels_per_unit); - } - else -#endif - return (0); -} - -float -png_get_pixel_aspect_ratio(png_structp png_ptr, png_infop info_ptr) - { -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) - { - png_debug1(1, "in %s retrieval function\n", "png_get_aspect_ratio"); - if (info_ptr->x_pixels_per_unit == 0) - return ((float)0.0); - else - return ((float)info_ptr->y_pixels_per_unit - /(float)info_ptr->x_pixels_per_unit); - } - else -#endif - return ((float)0.0); -} - -#ifdef PNG_INCH_CONVERSIONS -png_uint_32 -png_get_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_pixels_per_meter(png_ptr, info_ptr) - *.03937 +.5) -} - -png_uint_32 -png_get_x_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_x_pixels_per_meter(png_ptr, info_ptr) - *.03937 +.5) -} - -png_uint_32 -png_get_y_pixels_per_inch(png_structp png_ptr, png_infop info_ptr) -{ - return ((png_uint_32)((float)png_get_y_pixels_per_meter(png_ptr, info_ptr) - *.03937 +.5) -} - -float -png_get_x_offset_inches(png_structp png_ptr, png_infop info_ptr) -{ - return ((float)png_get_x_offset_microns(png_ptr, info_ptr) - *.03937/1000000. +.5) -} - -float -png_get_y_offset_inches(png_structp png_ptr, png_infop info_ptr) -{ - return ((float)png_get_y_offset_microns(png_ptr, info_ptr) - *.03937/1000000. +.5) -} - -#if defined(PNG_READ_pHYs_SUPPORTED) -png_uint_32 -png_get_pHYs_dpi(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) -{ - png_uint_32 retval = 0; - - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "pHYs"); - if (res_x != NULL) - { - *res_x = info_ptr->x_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (res_y != NULL) - { - *res_y = info_ptr->y_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (unit_type != NULL) - { - *unit_type = (int)info_ptr->phys_unit_type; - retval |= PNG_INFO_pHYs; - if(unit_type == 1) - { - if (res_x != NULL) *res_x = (png_uint_32)(*res_x * 39.37 + .50); - if (res_y != NULL) *res_y = (png_uint_32)(*res_y * 39.37 + .50); - } - } - } - return (retval); -} -#endif /* PNG_READ_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS */ - -/* png_get_channels really belongs in here, too, but it's been around longer */ - -#endif /* PNG_EASY_ACCESS_SUPPORTED */ - -#if defined(PNG_READ_bKGD_SUPPORTED) -png_uint_32 -png_get_bKGD(png_structp png_ptr, png_infop info_ptr, - png_color_16p *background) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) - && background != NULL) - { - png_debug1(1, "in %s retrieval function\n", "bKGD"); - *background = &(info_ptr->background); - return (PNG_INFO_bKGD); - } - return (0); -} -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -png_uint_32 -png_get_cHRM(png_structp png_ptr, png_infop info_ptr, - double *white_x, double *white_y, double *red_x, double *red_y, - double *green_x, double *green_y, double *blue_x, double *blue_y) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) - { - png_debug1(1, "in %s retrieval function\n", "cHRM"); - if (white_x != NULL) - *white_x = (double)info_ptr->x_white; - if (white_y != NULL) - *white_y = (double)info_ptr->y_white; - if (red_x != NULL) - *red_x = (double)info_ptr->x_red; - if (red_y != NULL) - *red_y = (double)info_ptr->y_red; - if (green_x != NULL) - *green_x = (double)info_ptr->x_green; - if (green_y != NULL) - *green_y = (double)info_ptr->y_green; - if (blue_x != NULL) - *blue_x = (double)info_ptr->x_blue; - if (blue_y != NULL) - *blue_y = (double)info_ptr->y_blue; - return (PNG_INFO_cHRM); - } - return (0); -} -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) -png_uint_32 -png_get_gAMA(png_structp png_ptr, png_infop info_ptr, double *file_gamma) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) - && file_gamma != NULL) - { - png_debug1(1, "in %s retrieval function\n", "gAMA"); - *file_gamma = (double)info_ptr->gamma; - return (PNG_INFO_gAMA); - } - return (0); -} -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -png_uint_32 -png_get_sRGB(png_structp png_ptr, png_infop info_ptr, int *file_srgb_intent) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) - && file_srgb_intent != NULL) - { - png_debug1(1, "in %s retrieval function\n", "sRGB"); - *file_srgb_intent = (int)info_ptr->srgb_intent; - return (PNG_INFO_sRGB); - } - return (0); -} -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -png_uint_32 -png_get_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) - && hist != NULL) - { - png_debug1(1, "in %s retrieval function\n", "hIST"); - *hist = info_ptr->hist; - return (PNG_INFO_hIST); - } - return (0); -} -#endif - -png_uint_32 -png_get_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *width, png_uint_32 *height, int *bit_depth, - int *color_type, int *interlace_type, int *compression_type, - int *filter_type) - -{ - if (png_ptr != NULL && info_ptr != NULL && width != NULL && height != NULL && - bit_depth != NULL && color_type != NULL) - { - int pixel_depth, channels; - png_uint_32 rowbytes_per_pixel; - - png_debug1(1, "in %s retrieval function\n", "IHDR"); - *width = info_ptr->width; - *height = info_ptr->height; - *bit_depth = info_ptr->bit_depth; - *color_type = info_ptr->color_type; - if (compression_type != NULL) - *compression_type = info_ptr->compression_type; - if (filter_type != NULL) - *filter_type = info_ptr->filter_type; - if (interlace_type != NULL) - *interlace_type = info_ptr->interlace_type; - - /* check for potential overflow of rowbytes */ - if (*color_type == PNG_COLOR_TYPE_PALETTE) - channels = 1; - else if (*color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - else - channels = 1; - if (*color_type & PNG_COLOR_MASK_ALPHA) - channels++; - pixel_depth = *bit_depth * channels; - rowbytes_per_pixel = (pixel_depth + 7) >> 3; - if ((*width > (png_uint_32)2147483647L/rowbytes_per_pixel)) - { - png_warning(png_ptr, - "Width too large for libpng to process image data."); - } - return (1); - } - return (0); -} - -#if defined(PNG_READ_oFFs_SUPPORTED) -png_uint_32 -png_get_oFFs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *offset_x, png_uint_32 *offset_y, int *unit_type) -{ - if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) - && offset_x != NULL && offset_y != NULL && unit_type != NULL) - { - png_debug1(1, "in %s retrieval function\n", "oFFs"); - *offset_x = info_ptr->x_offset; - *offset_y = info_ptr->y_offset; - *unit_type = (int)info_ptr->offset_unit_type; - return (PNG_INFO_oFFs); - } - return (0); -} -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -png_uint_32 -png_get_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, - png_charp *units, png_charpp *params) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL && - purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && - nparams != NULL && units != NULL && params != NULL) - { - png_debug1(1, "in %s retrieval function\n", "pCAL"); - *purpose = info_ptr->pcal_purpose; - *X0 = info_ptr->pcal_X0; - *X1 = info_ptr->pcal_X1; - *type = (int)info_ptr->pcal_type; - *nparams = (int)info_ptr->pcal_nparams; - *units = info_ptr->pcal_units; - *params = info_ptr->pcal_params; - return (PNG_INFO_pCAL); - } - return (0); -} -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -png_uint_32 -png_get_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) -{ - png_uint_32 retval = 0; - - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs) - { - png_debug1(1, "in %s retrieval function\n", "pHYs"); - if (res_x != NULL) - { - *res_x = info_ptr->x_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (res_y != NULL) - { - *res_y = info_ptr->y_pixels_per_unit; - retval |= PNG_INFO_pHYs; - } - if (unit_type != NULL) - { - *unit_type = (int)info_ptr->phys_unit_type; - retval |= PNG_INFO_pHYs; - } - } - return (retval); -} -#endif - -png_uint_32 -png_get_PLTE(png_structp png_ptr, png_infop info_ptr, png_colorp *palette, - int *num_palette) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_PLTE && - palette != NULL) - { - png_debug1(1, "in %s retrieval function\n", "PLTE"); - *palette = info_ptr->palette; - *num_palette = info_ptr->num_palette; - png_debug1(3, "num_palette = %d\n", *num_palette); - return (PNG_INFO_PLTE); - } - return (0); -} - -#if defined(PNG_READ_sBIT_SUPPORTED) -png_uint_32 -png_get_sBIT(png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT && - sig_bit != NULL) - { - png_debug1(1, "in %s retrieval function\n", "sBIT"); - *sig_bit = &(info_ptr->sig_bit); - return (PNG_INFO_sBIT); - } - return (0); -} -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) -png_uint_32 -png_get_text(png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, - int *num_text) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) - { - png_debug1(1, "in %s retrieval function\n", - (png_ptr->chunk_name[0] == '\0' ? "text" - : (png_const_charp)png_ptr->chunk_name)); - if (text_ptr != NULL) - *text_ptr = info_ptr->text; - if (num_text != NULL) - *num_text = info_ptr->num_text; - return ((png_uint_32)info_ptr->num_text); - } - return(0); -} -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -png_uint_32 -png_get_tIME(png_structp png_ptr, png_infop info_ptr, png_timep *mod_time) -{ - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME && - mod_time != NULL) - { - png_debug1(1, "in %s retrieval function\n", "tIME"); - *mod_time = &(info_ptr->mod_time); - return (PNG_INFO_tIME); - } - return (0); -} -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -png_uint_32 -png_get_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep *trans, int *num_trans, png_color_16p *trans_values) -{ - png_uint_32 retval = 0; - if (png_ptr != NULL && info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS) - { - png_debug1(1, "in %s retrieval function\n", "tRNS"); - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (trans != NULL) - { - *trans = info_ptr->trans; - retval |= PNG_INFO_tRNS; - } - if (trans_values != NULL) - *trans_values = &(info_ptr->trans_values); - } - else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ - { - if (trans_values != NULL) - { - *trans_values = &(info_ptr->trans_values); - retval |= PNG_INFO_tRNS; - } - if(trans != NULL) - *trans = NULL; - } - if(num_trans != NULL) - { - *num_trans = info_ptr->num_trans; - retval |= PNG_INFO_tRNS; - } - } - return (retval); -} -#endif - - + +/* pngget.c - retrieval of values from info struct + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + */ + +#include "pngpriv.h" + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +png_uint_32 PNGAPI +png_get_valid(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 flag) +{ + if (png_ptr != NULL && info_ptr != NULL) + return(info_ptr->valid & flag); + + return(0); +} + +png_size_t PNGAPI +png_get_rowbytes(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return(info_ptr->rowbytes); + + return(0); +} + +#ifdef PNG_INFO_IMAGE_SUPPORTED +png_bytepp PNGAPI +png_get_rows(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return(info_ptr->row_pointers); + + return(0); +} +#endif + +#ifdef PNG_EASY_ACCESS_SUPPORTED +/* Easy access to info, added in libpng-0.99 */ +png_uint_32 PNGAPI +png_get_image_width(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->width; + + return (0); +} + +png_uint_32 PNGAPI +png_get_image_height(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->height; + + return (0); +} + +png_byte PNGAPI +png_get_bit_depth(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->bit_depth; + + return (0); +} + +png_byte PNGAPI +png_get_color_type(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->color_type; + + return (0); +} + +png_byte PNGAPI +png_get_filter_type(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->filter_type; + + return (0); +} + +png_byte PNGAPI +png_get_interlace_type(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->interlace_type; + + return (0); +} + +png_byte PNGAPI +png_get_compression_type(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return info_ptr->compression_type; + + return (0); +} + +png_uint_32 PNGAPI +png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", + "png_get_x_pixels_per_meter"); + + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) + return (info_ptr->x_pixels_per_unit); + } +#endif + + return (0); +} + +png_uint_32 PNGAPI +png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", + "png_get_y_pixels_per_meter"); + + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER) + return (info_ptr->y_pixels_per_unit); + } +#endif + + return (0); +} + +png_uint_32 PNGAPI +png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", "png_get_pixels_per_meter"); + + if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER && + info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit) + return (info_ptr->x_pixels_per_unit); + } +#endif + + return (0); +} + +#ifdef PNG_FLOATING_POINT_SUPPORTED +float PNGAPI +png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_READ_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio"); + + if (info_ptr->x_pixels_per_unit != 0) + return ((float)((float)info_ptr->y_pixels_per_unit + /(float)info_ptr->x_pixels_per_unit)); + } +#endif + + return ((float)0.0); +} +#endif + +#ifdef PNG_FIXED_POINT_SUPPORTED +png_fixed_point PNGAPI +png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr, + png_const_infop info_ptr) +{ +#ifdef PNG_READ_pHYs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs) + && info_ptr->x_pixels_per_unit > 0 && info_ptr->y_pixels_per_unit > 0 + && info_ptr->x_pixels_per_unit <= PNG_UINT_31_MAX + && info_ptr->y_pixels_per_unit <= PNG_UINT_31_MAX) + { + png_fixed_point res; + + png_debug1(1, "in %s retrieval function", "png_get_aspect_ratio_fixed"); + + /* The following casts work because a PNG 4 byte integer only has a valid + * range of 0..2^31-1; otherwise the cast might overflow. + */ + if (png_muldiv(&res, (png_int_32)info_ptr->y_pixels_per_unit, PNG_FP_1, + (png_int_32)info_ptr->x_pixels_per_unit)) + return res; + } +#endif + + return 0; +} +#endif + +png_int_32 PNGAPI +png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_oFFs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + { + png_debug1(1, "in %s retrieval function", "png_get_x_offset_microns"); + + if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) + return (info_ptr->x_offset); + } +#endif + + return (0); +} + +png_int_32 PNGAPI +png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_oFFs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + { + png_debug1(1, "in %s retrieval function", "png_get_y_offset_microns"); + + if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER) + return (info_ptr->y_offset); + } +#endif + + return (0); +} + +png_int_32 PNGAPI +png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_oFFs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + { + png_debug1(1, "in %s retrieval function", "png_get_x_offset_pixels"); + + if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) + return (info_ptr->x_offset); + } +#endif + + return (0); +} + +png_int_32 PNGAPI +png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr) +{ +#ifdef PNG_oFFs_SUPPORTED + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + { + png_debug1(1, "in %s retrieval function", "png_get_y_offset_pixels"); + + if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL) + return (info_ptr->y_offset); + } +#endif + + return (0); +} + +#ifdef PNG_INCH_CONVERSIONS_SUPPORTED +static png_uint_32 +ppi_from_ppm(png_uint_32 ppm) +{ +#if 0 + /* The conversion is *(2.54/100), in binary (32 digits): + * .00000110100000001001110101001001 + */ + png_uint_32 t1001, t1101; + ppm >>= 1; /* .1 */ + t1001 = ppm + (ppm >> 3); /* .1001 */ + t1101 = t1001 + (ppm >> 1); /* .1101 */ + ppm >>= 20; /* .000000000000000000001 */ + t1101 += t1101 >> 15; /* .1101000000000001101 */ + t1001 >>= 11; /* .000000000001001 */ + t1001 += t1001 >> 12; /* .000000000001001000000001001 */ + ppm += t1001; /* .000000000001001000001001001 */ + ppm += t1101; /* .110100000001001110101001001 */ + return (ppm + 16) >> 5;/* .00000110100000001001110101001001 */ +#else + /* The argument is a PNG unsigned integer, so it is not permitted + * to be bigger than 2^31. + */ + png_fixed_point result; + if (ppm <= PNG_UINT_31_MAX && png_muldiv(&result, (png_int_32)ppm, 127, + 5000)) + return result; + + /* Overflow. */ + return 0; +#endif +} + +png_uint_32 PNGAPI +png_get_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +{ + return ppi_from_ppm(png_get_pixels_per_meter(png_ptr, info_ptr)); +} + +png_uint_32 PNGAPI +png_get_x_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +{ + return ppi_from_ppm(png_get_x_pixels_per_meter(png_ptr, info_ptr)); +} + +png_uint_32 PNGAPI +png_get_y_pixels_per_inch(png_const_structp png_ptr, png_const_infop info_ptr) +{ + return ppi_from_ppm(png_get_y_pixels_per_meter(png_ptr, info_ptr)); +} + +#ifdef PNG_FIXED_POINT_SUPPORTED +static png_fixed_point +png_fixed_inches_from_microns(png_structp png_ptr, png_int_32 microns) +{ + /* Convert from metres * 1,000,000 to inches * 100,000, meters to + * inches is simply *(100/2.54), so we want *(10/2.54) == 500/127. + * Notice that this can overflow - a warning is output and 0 is + * returned. + */ + return png_muldiv_warn(png_ptr, microns, 500, 127); +} + +png_fixed_point PNGAPI +png_get_x_offset_inches_fixed(png_structp png_ptr, + png_const_infop info_ptr) +{ + return png_fixed_inches_from_microns(png_ptr, + png_get_x_offset_microns(png_ptr, info_ptr)); +} +#endif + +#ifdef PNG_FIXED_POINT_SUPPORTED +png_fixed_point PNGAPI +png_get_y_offset_inches_fixed(png_structp png_ptr, + png_const_infop info_ptr) +{ + return png_fixed_inches_from_microns(png_ptr, + png_get_y_offset_microns(png_ptr, info_ptr)); +} +#endif + +#ifdef PNG_FLOATING_POINT_SUPPORTED +float PNGAPI +png_get_x_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +{ + /* To avoid the overflow do the conversion directly in floating + * point. + */ + return (float)(png_get_x_offset_microns(png_ptr, info_ptr) * .00003937); +} +#endif + +#ifdef PNG_FLOATING_POINT_SUPPORTED +float PNGAPI +png_get_y_offset_inches(png_const_structp png_ptr, png_const_infop info_ptr) +{ + /* To avoid the overflow do the conversion directly in floating + * point. + */ + return (float)(png_get_y_offset_microns(png_ptr, info_ptr) * .00003937); +} +#endif + +#ifdef PNG_pHYs_SUPPORTED +png_uint_32 PNGAPI +png_get_pHYs_dpi(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) +{ + png_uint_32 retval = 0; + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_debug1(1, "in %s retrieval function", "pHYs"); + + if (res_x != NULL) + { + *res_x = info_ptr->x_pixels_per_unit; + retval |= PNG_INFO_pHYs; + } + + if (res_y != NULL) + { + *res_y = info_ptr->y_pixels_per_unit; + retval |= PNG_INFO_pHYs; + } + + if (unit_type != NULL) + { + *unit_type = (int)info_ptr->phys_unit_type; + retval |= PNG_INFO_pHYs; + + if (*unit_type == 1) + { + if (res_x != NULL) *res_x = (png_uint_32)(*res_x * .0254 + .50); + if (res_y != NULL) *res_y = (png_uint_32)(*res_y * .0254 + .50); + } + } + } + + return (retval); +} +#endif /* PNG_pHYs_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ + +/* png_get_channels really belongs in here, too, but it's been around longer */ + +#endif /* PNG_EASY_ACCESS_SUPPORTED */ + +png_byte PNGAPI +png_get_channels(png_const_structp png_ptr, png_const_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return(info_ptr->channels); + + return (0); +} + +png_const_bytep PNGAPI +png_get_signature(png_const_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr != NULL && info_ptr != NULL) + return(info_ptr->signature); + + return (NULL); +} + +#ifdef PNG_bKGD_SUPPORTED +png_uint_32 PNGAPI +png_get_bKGD(png_const_structp png_ptr, png_infop info_ptr, + png_color_16p *background) +{ + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD) + && background != NULL) + { + png_debug1(1, "in %s retrieval function", "bKGD"); + + *background = &(info_ptr->background); + return (PNG_INFO_bKGD); + } + + return (0); +} +#endif + +#ifdef PNG_cHRM_SUPPORTED +/* The XYZ APIs were added in 1.5.5 to take advantage of the code added at the + * same time to correct the rgb grayscale coefficient defaults obtained from the + * cHRM chunk in 1.5.4 + */ +png_uint_32 PNGFAPI +png_get_cHRM_XYZ_fixed(png_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *int_red_X, png_fixed_point *int_red_Y, + png_fixed_point *int_red_Z, png_fixed_point *int_green_X, + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, + png_fixed_point *int_blue_Z) +{ + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + { + png_xy xy; + png_XYZ XYZ; + + png_debug1(1, "in %s retrieval function", "cHRM_XYZ"); + + xy.whitex = info_ptr->x_white; + xy.whitey = info_ptr->y_white; + xy.redx = info_ptr->x_red; + xy.redy = info_ptr->y_red; + xy.greenx = info_ptr->x_green; + xy.greeny = info_ptr->y_green; + xy.bluex = info_ptr->x_blue; + xy.bluey = info_ptr->y_blue; + + /* The *_checked function handles error reporting, so just return 0 if + * there is a failure here. + */ + if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) + { + if (int_red_X != NULL) + *int_red_X = XYZ.redX; + if (int_red_Y != NULL) + *int_red_Y = XYZ.redY; + if (int_red_Z != NULL) + *int_red_Z = XYZ.redZ; + if (int_green_X != NULL) + *int_green_X = XYZ.greenX; + if (int_green_Y != NULL) + *int_green_Y = XYZ.greenY; + if (int_green_Z != NULL) + *int_green_Z = XYZ.greenZ; + if (int_blue_X != NULL) + *int_blue_X = XYZ.blueX; + if (int_blue_Y != NULL) + *int_blue_Y = XYZ.blueY; + if (int_blue_Z != NULL) + *int_blue_Z = XYZ.blueZ; + + return (PNG_INFO_cHRM); + } + } + + return (0); +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_cHRM(png_const_structp png_ptr, png_const_infop info_ptr, + double *white_x, double *white_y, double *red_x, double *red_y, + double *green_x, double *green_y, double *blue_x, double *blue_y) +{ + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + { + png_debug1(1, "in %s retrieval function", "cHRM"); + + if (white_x != NULL) + *white_x = png_float(png_ptr, info_ptr->x_white, "cHRM white X"); + if (white_y != NULL) + *white_y = png_float(png_ptr, info_ptr->y_white, "cHRM white Y"); + if (red_x != NULL) + *red_x = png_float(png_ptr, info_ptr->x_red, "cHRM red X"); + if (red_y != NULL) + *red_y = png_float(png_ptr, info_ptr->y_red, "cHRM red Y"); + if (green_x != NULL) + *green_x = png_float(png_ptr, info_ptr->x_green, "cHRM green X"); + if (green_y != NULL) + *green_y = png_float(png_ptr, info_ptr->y_green, "cHRM green Y"); + if (blue_x != NULL) + *blue_x = png_float(png_ptr, info_ptr->x_blue, "cHRM blue X"); + if (blue_y != NULL) + *blue_y = png_float(png_ptr, info_ptr->y_blue, "cHRM blue Y"); + return (PNG_INFO_cHRM); + } + + return (0); +} + +png_uint_32 PNGAPI +png_get_cHRM_XYZ(png_structp png_ptr, png_const_infop info_ptr, + double *red_X, double *red_Y, double *red_Z, double *green_X, + double *green_Y, double *green_Z, double *blue_X, double *blue_Y, + double *blue_Z) +{ + png_XYZ XYZ; + + if (png_get_cHRM_XYZ_fixed(png_ptr, info_ptr, + &XYZ.redX, &XYZ.redY, &XYZ.redZ, &XYZ.greenX, &XYZ.greenY, &XYZ.greenZ, + &XYZ.blueX, &XYZ.blueY, &XYZ.blueZ) & PNG_INFO_cHRM) + { + if (red_X != NULL) + *red_X = png_float(png_ptr, XYZ.redX, "cHRM red X"); + if (red_Y != NULL) + *red_Y = png_float(png_ptr, XYZ.redY, "cHRM red Y"); + if (red_Z != NULL) + *red_Z = png_float(png_ptr, XYZ.redZ, "cHRM red Z"); + if (green_X != NULL) + *green_X = png_float(png_ptr, XYZ.greenX, "cHRM green X"); + if (green_Y != NULL) + *green_Y = png_float(png_ptr, XYZ.greenY, "cHRM green Y"); + if (green_Z != NULL) + *green_Z = png_float(png_ptr, XYZ.greenZ, "cHRM green Z"); + if (blue_X != NULL) + *blue_X = png_float(png_ptr, XYZ.blueX, "cHRM blue X"); + if (blue_Y != NULL) + *blue_Y = png_float(png_ptr, XYZ.blueY, "cHRM blue Y"); + if (blue_Z != NULL) + *blue_Z = png_float(png_ptr, XYZ.blueZ, "cHRM blue Z"); + return (PNG_INFO_cHRM); + } + + return (0); +} +# endif + +# ifdef PNG_FIXED_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_cHRM_fixed(png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *white_x, png_fixed_point *white_y, png_fixed_point *red_x, + png_fixed_point *red_y, png_fixed_point *green_x, png_fixed_point *green_y, + png_fixed_point *blue_x, png_fixed_point *blue_y) +{ + png_debug1(1, "in %s retrieval function", "cHRM"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + { + if (white_x != NULL) + *white_x = info_ptr->x_white; + if (white_y != NULL) + *white_y = info_ptr->y_white; + if (red_x != NULL) + *red_x = info_ptr->x_red; + if (red_y != NULL) + *red_y = info_ptr->y_red; + if (green_x != NULL) + *green_x = info_ptr->x_green; + if (green_y != NULL) + *green_y = info_ptr->y_green; + if (blue_x != NULL) + *blue_x = info_ptr->x_blue; + if (blue_y != NULL) + *blue_y = info_ptr->y_blue; + return (PNG_INFO_cHRM); + } + + return (0); +} +# endif +#endif + +#ifdef PNG_gAMA_SUPPORTED +png_uint_32 PNGFAPI +png_get_gAMA_fixed(png_const_structp png_ptr, png_const_infop info_ptr, + png_fixed_point *file_gamma) +{ + png_debug1(1, "in %s retrieval function", "gAMA"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) + && file_gamma != NULL) + { + *file_gamma = info_ptr->gamma; + return (PNG_INFO_gAMA); + } + + return (0); +} +# ifdef PNG_FLOATING_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr, + double *file_gamma) +{ + png_fixed_point igamma; + png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma); + + if (ok) + *file_gamma = png_float(png_ptr, igamma, "png_get_gAMA"); + + return ok; +} + +# endif +#endif + +#ifdef PNG_sRGB_SUPPORTED +png_uint_32 PNGAPI +png_get_sRGB(png_const_structp png_ptr, png_const_infop info_ptr, + int *file_srgb_intent) +{ + png_debug1(1, "in %s retrieval function", "sRGB"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB) + && file_srgb_intent != NULL) + { + *file_srgb_intent = (int)info_ptr->srgb_intent; + return (PNG_INFO_sRGB); + } + + return (0); +} +#endif + +#ifdef PNG_iCCP_SUPPORTED +png_uint_32 PNGAPI +png_get_iCCP(png_const_structp png_ptr, png_const_infop info_ptr, + png_charpp name, int *compression_type, + png_bytepp profile, png_uint_32 *proflen) +{ + png_debug1(1, "in %s retrieval function", "iCCP"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP) + && name != NULL && compression_type != NULL && profile != NULL && + proflen != NULL) + { + *name = info_ptr->iccp_name; + *profile = info_ptr->iccp_profile; + /* Compression_type is a dummy so the API won't have to change + * if we introduce multiple compression types later. + */ + *proflen = info_ptr->iccp_proflen; + *compression_type = info_ptr->iccp_compression; + return (PNG_INFO_iCCP); + } + + return (0); +} +#endif + +#ifdef PNG_sPLT_SUPPORTED +png_uint_32 PNGAPI +png_get_sPLT(png_const_structp png_ptr, png_const_infop info_ptr, + png_sPLT_tpp spalettes) +{ + if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL) + { + *spalettes = info_ptr->splt_palettes; + return ((png_uint_32)info_ptr->splt_palettes_num); + } + + return (0); +} +#endif + +#ifdef PNG_hIST_SUPPORTED +png_uint_32 PNGAPI +png_get_hIST(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_16p *hist) +{ + png_debug1(1, "in %s retrieval function", "hIST"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST) + && hist != NULL) + { + *hist = info_ptr->hist; + return (PNG_INFO_hIST); + } + + return (0); +} +#endif + +png_uint_32 PNGAPI +png_get_IHDR(png_structp png_ptr, png_infop info_ptr, + png_uint_32 *width, png_uint_32 *height, int *bit_depth, + int *color_type, int *interlace_type, int *compression_type, + int *filter_type) + +{ + png_debug1(1, "in %s retrieval function", "IHDR"); + + if (png_ptr == NULL || info_ptr == NULL || width == NULL || + height == NULL || bit_depth == NULL || color_type == NULL) + return (0); + + *width = info_ptr->width; + *height = info_ptr->height; + *bit_depth = info_ptr->bit_depth; + *color_type = info_ptr->color_type; + + if (compression_type != NULL) + *compression_type = info_ptr->compression_type; + + if (filter_type != NULL) + *filter_type = info_ptr->filter_type; + + if (interlace_type != NULL) + *interlace_type = info_ptr->interlace_type; + + /* This is redundant if we can be sure that the info_ptr values were all + * assigned in png_set_IHDR(). We do the check anyhow in case an + * application has ignored our advice not to mess with the members + * of info_ptr directly. + */ + png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, + info_ptr->compression_type, info_ptr->filter_type); + + return (1); +} + +#ifdef PNG_oFFs_SUPPORTED +png_uint_32 PNGAPI +png_get_oFFs(png_const_structp png_ptr, png_const_infop info_ptr, + png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type) +{ + png_debug1(1, "in %s retrieval function", "oFFs"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs) + && offset_x != NULL && offset_y != NULL && unit_type != NULL) + { + *offset_x = info_ptr->x_offset; + *offset_y = info_ptr->y_offset; + *unit_type = (int)info_ptr->offset_unit_type; + return (PNG_INFO_oFFs); + } + + return (0); +} +#endif + +#ifdef PNG_pCAL_SUPPORTED +png_uint_32 PNGAPI +png_get_pCAL(png_const_structp png_ptr, png_const_infop info_ptr, + png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, + png_charp *units, png_charpp *params) +{ + png_debug1(1, "in %s retrieval function", "pCAL"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL) + && purpose != NULL && X0 != NULL && X1 != NULL && type != NULL && + nparams != NULL && units != NULL && params != NULL) + { + *purpose = info_ptr->pcal_purpose; + *X0 = info_ptr->pcal_X0; + *X1 = info_ptr->pcal_X1; + *type = (int)info_ptr->pcal_type; + *nparams = (int)info_ptr->pcal_nparams; + *units = info_ptr->pcal_units; + *params = info_ptr->pcal_params; + return (PNG_INFO_pCAL); + } + + return (0); +} +#endif + +#ifdef PNG_sCAL_SUPPORTED +# ifdef PNG_FIXED_POINT_SUPPORTED +# ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +png_uint_32 PNGAPI +png_get_sCAL_fixed(png_structp png_ptr, png_const_infop info_ptr, + int *unit, png_fixed_point *width, png_fixed_point *height) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + /*TODO: make this work without FP support */ + *width = png_fixed(png_ptr, atof(info_ptr->scal_s_width), "sCAL width"); + *height = png_fixed(png_ptr, atof(info_ptr->scal_s_height), + "sCAL height"); + return (PNG_INFO_sCAL); + } + + return(0); +} +# endif /* FLOATING_ARITHMETIC */ +# endif /* FIXED_POINT */ +# ifdef PNG_FLOATING_POINT_SUPPORTED +png_uint_32 PNGAPI +png_get_sCAL(png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, double *width, double *height) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + *width = atof(info_ptr->scal_s_width); + *height = atof(info_ptr->scal_s_height); + return (PNG_INFO_sCAL); + } + + return(0); +} +# endif /* FLOATING POINT */ +png_uint_32 PNGAPI +png_get_sCAL_s(png_const_structp png_ptr, png_const_infop info_ptr, + int *unit, png_charpp width, png_charpp height) +{ + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_sCAL)) + { + *unit = info_ptr->scal_unit; + *width = info_ptr->scal_s_width; + *height = info_ptr->scal_s_height; + return (PNG_INFO_sCAL); + } + + return(0); +} +#endif /* sCAL */ + +#ifdef PNG_pHYs_SUPPORTED +png_uint_32 PNGAPI +png_get_pHYs(png_const_structp png_ptr, png_const_infop info_ptr, + png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type) +{ + png_uint_32 retval = 0; + + png_debug1(1, "in %s retrieval function", "pHYs"); + + if (png_ptr != NULL && info_ptr != NULL && + (info_ptr->valid & PNG_INFO_pHYs)) + { + if (res_x != NULL) + { + *res_x = info_ptr->x_pixels_per_unit; + retval |= PNG_INFO_pHYs; + } + + if (res_y != NULL) + { + *res_y = info_ptr->y_pixels_per_unit; + retval |= PNG_INFO_pHYs; + } + + if (unit_type != NULL) + { + *unit_type = (int)info_ptr->phys_unit_type; + retval |= PNG_INFO_pHYs; + } + } + + return (retval); +} +#endif /* pHYs */ + +png_uint_32 PNGAPI +png_get_PLTE(png_const_structp png_ptr, png_const_infop info_ptr, + png_colorp *palette, int *num_palette) +{ + png_debug1(1, "in %s retrieval function", "PLTE"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_PLTE) + && palette != NULL) + { + *palette = info_ptr->palette; + *num_palette = info_ptr->num_palette; + png_debug1(3, "num_palette = %d", *num_palette); + return (PNG_INFO_PLTE); + } + + return (0); +} + +#ifdef PNG_sBIT_SUPPORTED +png_uint_32 PNGAPI +png_get_sBIT(png_const_structp png_ptr, png_infop info_ptr, + png_color_8p *sig_bit) +{ + png_debug1(1, "in %s retrieval function", "sBIT"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT) + && sig_bit != NULL) + { + *sig_bit = &(info_ptr->sig_bit); + return (PNG_INFO_sBIT); + } + + return (0); +} +#endif + +#ifdef PNG_TEXT_SUPPORTED +png_uint_32 PNGAPI +png_get_text(png_const_structp png_ptr, png_const_infop info_ptr, + png_textp *text_ptr, int *num_text) +{ + if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0) + { + png_debug1(1, "in 0x%lx retrieval function", + (unsigned long)png_ptr->chunk_name); + + if (text_ptr != NULL) + *text_ptr = info_ptr->text; + + if (num_text != NULL) + *num_text = info_ptr->num_text; + + return ((png_uint_32)info_ptr->num_text); + } + + if (num_text != NULL) + *num_text = 0; + + return(0); +} +#endif + +#ifdef PNG_tIME_SUPPORTED +png_uint_32 PNGAPI +png_get_tIME(png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time) +{ + png_debug1(1, "in %s retrieval function", "tIME"); + + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME) + && mod_time != NULL) + { + *mod_time = &(info_ptr->mod_time); + return (PNG_INFO_tIME); + } + + return (0); +} +#endif + +#ifdef PNG_tRNS_SUPPORTED +png_uint_32 PNGAPI +png_get_tRNS(png_const_structp png_ptr, png_infop info_ptr, + png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color) +{ + png_uint_32 retval = 0; + if (png_ptr != NULL && info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) + { + png_debug1(1, "in %s retrieval function", "tRNS"); + + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (trans_alpha != NULL) + { + *trans_alpha = info_ptr->trans_alpha; + retval |= PNG_INFO_tRNS; + } + + if (trans_color != NULL) + *trans_color = &(info_ptr->trans_color); + } + + else /* if (info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) */ + { + if (trans_color != NULL) + { + *trans_color = &(info_ptr->trans_color); + retval |= PNG_INFO_tRNS; + } + + if (trans_alpha != NULL) + *trans_alpha = NULL; + } + + if (num_trans != NULL) + { + *num_trans = info_ptr->num_trans; + retval |= PNG_INFO_tRNS; + } + } + + return (retval); +} +#endif + +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +int PNGAPI +png_get_unknown_chunks(png_const_structp png_ptr, png_const_infop info_ptr, + png_unknown_chunkpp unknowns) +{ + if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL) + { + *unknowns = info_ptr->unknown_chunks; + return info_ptr->unknown_chunks_num; + } + + return (0); +} +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +png_byte PNGAPI +png_get_rgb_to_gray_status (png_const_structp png_ptr) +{ + return (png_byte)(png_ptr ? png_ptr->rgb_to_gray_status : 0); +} +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +png_voidp PNGAPI +png_get_user_chunk_ptr(png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->user_chunk_ptr : NULL); +} +#endif + +png_size_t PNGAPI +png_get_compression_buffer_size(png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->zbuf_size : 0); +} + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +/* These functions were added to libpng 1.2.6 and were enabled + * by default in libpng-1.4.0 */ +png_uint_32 PNGAPI +png_get_user_width_max (png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->user_width_max : 0); +} + +png_uint_32 PNGAPI +png_get_user_height_max (png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->user_height_max : 0); +} + +/* This function was added to libpng 1.4.0 */ +png_uint_32 PNGAPI +png_get_chunk_cache_max (png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->user_chunk_cache_max : 0); +} + +/* This function was added to libpng 1.4.1 */ +png_alloc_size_t PNGAPI +png_get_chunk_malloc_max (png_const_structp png_ptr) +{ + return (png_ptr ? png_ptr->user_chunk_malloc_max : 0); +} +#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ + +/* These functions were added to libpng 1.4.0 */ +#ifdef PNG_IO_STATE_SUPPORTED +png_uint_32 PNGAPI +png_get_io_state (png_structp png_ptr) +{ + return png_ptr->io_state; +} + +png_uint_32 PNGAPI +png_get_io_chunk_type (png_const_structp png_ptr) +{ + return png_ptr->chunk_name; +} + +png_const_bytep PNGAPI +png_get_io_chunk_name (png_structp png_ptr) +{ + PNG_CSTRING_FROM_CHUNK(png_ptr->io_chunk_string, png_ptr->chunk_name); + return png_ptr->io_chunk_string; +} +#endif /* ?PNG_IO_STATE_SUPPORTED */ + +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pnginfo.h b/ExternalLibs/glpng/png/pnginfo.h new file mode 100644 index 0000000..bbfb105 --- /dev/null +++ b/ExternalLibs/glpng/png/pnginfo.h @@ -0,0 +1,269 @@ + +/* pnginfo.h - header file for PNG reference library + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.0 [January 6, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + + /* png_info is a structure that holds the information in a PNG file so + * that the application can find out the characteristics of the image. + * If you are reading the file, this structure will tell you what is + * in the PNG file. If you are writing the file, fill in the information + * you want to put into the PNG file, using png_set_*() functions, then + * call png_write_info(). + * + * The names chosen should be very close to the PNG specification, so + * consult that document for information about the meaning of each field. + * + * With libpng < 0.95, it was only possible to directly set and read the + * the values in the png_info_struct, which meant that the contents and + * order of the values had to remain fixed. With libpng 0.95 and later, + * however, there are now functions that abstract the contents of + * png_info_struct from the application, so this makes it easier to use + * libpng with dynamic libraries, and even makes it possible to use + * libraries that don't have all of the libpng ancillary chunk-handing + * functionality. In libpng-1.5.0 this was moved into a separate private + * file that is not visible to applications. + * + * The following members may have allocated storage attached that should be + * cleaned up before the structure is discarded: palette, trans, text, + * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile, + * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these + * are automatically freed when the info structure is deallocated, if they were + * allocated internally by libpng. This behavior can be changed by means + * of the png_data_freer() function. + * + * More allocation details: all the chunk-reading functions that + * change these members go through the corresponding png_set_* + * functions. A function to clear these members is available: see + * png_free_data(). The png_set_* functions do not depend on being + * able to point info structure members to any of the storage they are + * passed (they make their own copies), EXCEPT that the png_set_text + * functions use the same storage passed to them in the text_ptr or + * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns + * functions do not make their own copies. + */ +#ifndef PNGINFO_H +#define PNGINFO_H + +struct png_info_def +{ + /* the following are necessary for every PNG file */ + png_uint_32 width; /* width of image in pixels (from IHDR) */ + png_uint_32 height; /* height of image in pixels (from IHDR) */ + png_uint_32 valid; /* valid chunk data (see PNG_INFO_ below) */ + png_size_t rowbytes; /* bytes needed to hold an untransformed row */ + png_colorp palette; /* array of color values (valid & PNG_INFO_PLTE) */ + png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */ + png_uint_16 num_trans; /* number of transparent palette color (tRNS) */ + png_byte bit_depth; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */ + png_byte color_type; /* see PNG_COLOR_TYPE_ below (from IHDR) */ + /* The following three should have been named *_method not *_type */ + png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ + png_byte filter_type; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ + png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + + /* The following is informational only on read, and not used on writes. */ + png_byte channels; /* number of data channels per pixel (1, 2, 3, 4) */ + png_byte pixel_depth; /* number of bits per pixel */ + png_byte spare_byte; /* to align the data, and for future use */ + png_byte signature[8]; /* magic bytes read by libpng from start of file */ + + /* The rest of the data is optional. If you are reading, check the + * valid field to see if the information in these are valid. If you + * are writing, set the valid field to those chunks you want written, + * and initialize the appropriate fields below. + */ + +#if defined(PNG_gAMA_SUPPORTED) + /* The gAMA chunk describes the gamma characteristics of the system + * on which the image was created, normally in the range [1.0, 2.5]. + * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. + */ + png_fixed_point gamma; +#endif + +#ifdef PNG_sRGB_SUPPORTED + /* GR-P, 0.96a */ + /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ + png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */ +#endif + +#ifdef PNG_TEXT_SUPPORTED + /* The tEXt, and zTXt chunks contain human-readable textual data in + * uncompressed, compressed, and optionally compressed forms, respectively. + * The data in "text" is an array of pointers to uncompressed, + * null-terminated C strings. Each chunk has a keyword that describes the + * textual data contained in that chunk. Keywords are not required to be + * unique, and the text string may be empty. Any number of text chunks may + * be in an image. + */ + int num_text; /* number of comments read or comments to write */ + int max_text; /* current size of text array */ + png_textp text; /* array of comments read or comments to write */ +#endif /* PNG_TEXT_SUPPORTED */ + +#ifdef PNG_tIME_SUPPORTED + /* The tIME chunk holds the last time the displayed image data was + * modified. See the png_time struct for the contents of this struct. + */ + png_time mod_time; +#endif + +#ifdef PNG_sBIT_SUPPORTED + /* The sBIT chunk specifies the number of significant high-order bits + * in the pixel data. Values are in the range [1, bit_depth], and are + * only specified for the channels in the pixel data. The contents of + * the low-order bits is not specified. Data is valid if + * (valid & PNG_INFO_sBIT) is non-zero. + */ + png_color_8 sig_bit; /* significant bits in color channels */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \ +defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The tRNS chunk supplies transparency data for paletted images and + * other image types that don't need a full alpha channel. There are + * "num_trans" transparency values for a paletted image, stored in the + * same order as the palette colors, starting from index 0. Values + * for the data are in the range [0, 255], ranging from fully transparent + * to fully opaque, respectively. For non-paletted images, there is a + * single color specified that should be treated as fully transparent. + * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. + */ + png_bytep trans_alpha; /* alpha values for paletted image */ + png_color_16 trans_color; /* transparent color for non-palette image */ +#endif + +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The bKGD chunk gives the suggested image background color if the + * display program does not have its own background color and the image + * is needs to composited onto a background before display. The colors + * in "background" are normally in the same color space/depth as the + * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. + */ + png_color_16 background; +#endif + +#ifdef PNG_oFFs_SUPPORTED + /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards + * and downwards from the top-left corner of the display, page, or other + * application-specific co-ordinate space. See the PNG_OFFSET_ defines + * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. + */ + png_int_32 x_offset; /* x offset on page */ + png_int_32 y_offset; /* y offset on page */ + png_byte offset_unit_type; /* offset units type */ +#endif + +#ifdef PNG_pHYs_SUPPORTED + /* The pHYs chunk gives the physical pixel density of the image for + * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ + * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. + */ + png_uint_32 x_pixels_per_unit; /* horizontal pixel density */ + png_uint_32 y_pixels_per_unit; /* vertical pixel density */ + png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */ +#endif + +#ifdef PNG_hIST_SUPPORTED + /* The hIST chunk contains the relative frequency or importance of the + * various palette entries, so that a viewer can intelligently select a + * reduced-color palette, if required. Data is an array of "num_palette" + * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) + * is non-zero. + */ + png_uint_16p hist; +#endif + +#ifdef PNG_cHRM_SUPPORTED + /* The cHRM chunk describes the CIE color characteristics of the monitor + * on which the PNG was created. This data allows the viewer to do gamut + * mapping of the input image to ensure that the viewer sees the same + * colors in the image as the creator. Values are in the range + * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. + */ + png_fixed_point x_white; + png_fixed_point y_white; + png_fixed_point x_red; + png_fixed_point y_red; + png_fixed_point x_green; + png_fixed_point y_green; + png_fixed_point x_blue; + png_fixed_point y_blue; +#endif + +#ifdef PNG_pCAL_SUPPORTED + /* The pCAL chunk describes a transformation between the stored pixel + * values and original physical data values used to create the image. + * The integer range [0, 2^bit_depth - 1] maps to the floating-point + * range given by [pcal_X0, pcal_X1], and are further transformed by a + * (possibly non-linear) transformation function given by "pcal_type" + * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ + * defines below, and the PNG-Group's PNG extensions document for a + * complete description of the transformations and how they should be + * implemented, and for a description of the ASCII parameter strings. + * Data values are valid if (valid & PNG_INFO_pCAL) non-zero. + */ + png_charp pcal_purpose; /* pCAL chunk description string */ + png_int_32 pcal_X0; /* minimum value */ + png_int_32 pcal_X1; /* maximum value */ + png_charp pcal_units; /* Latin-1 string giving physical units */ + png_charpp pcal_params; /* ASCII strings containing parameter values */ + png_byte pcal_type; /* equation type (see PNG_EQUATION_ below) */ + png_byte pcal_nparams; /* number of parameters given in pcal_params */ +#endif + +/* New members added in libpng-1.0.6 */ + png_uint_32 free_me; /* flags items libpng is responsible for freeing */ + +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + /* Storage for unknown chunks that the library doesn't recognize. */ + png_unknown_chunkp unknown_chunks; + int unknown_chunks_num; +#endif + +#ifdef PNG_iCCP_SUPPORTED + /* iCCP chunk data. */ + png_charp iccp_name; /* profile name */ + png_bytep iccp_profile; /* International Color Consortium profile data */ + png_uint_32 iccp_proflen; /* ICC profile data length */ + png_byte iccp_compression; /* Always zero */ +#endif + +#ifdef PNG_sPLT_SUPPORTED + /* Data on sPLT chunks (there may be more than one). */ + png_sPLT_tp splt_palettes; + png_uint_32 splt_palettes_num; +#endif + +#ifdef PNG_sCAL_SUPPORTED + /* The sCAL chunk describes the actual physical dimensions of the + * subject matter of the graphic. The chunk contains a unit specification + * a byte value, and two ASCII strings representing floating-point + * values. The values are width and height corresponsing to one pixel + * in the image. Data values are valid if (valid & PNG_INFO_sCAL) is + * non-zero. + */ + png_byte scal_unit; /* unit of physical scale */ + png_charp scal_s_width; /* string containing height */ + png_charp scal_s_height; /* string containing width */ +#endif + +#ifdef PNG_INFO_IMAGE_SUPPORTED + /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) + non-zero */ + /* Data valid if (valid & PNG_INFO_IDAT) non-zero */ + png_bytepp row_pointers; /* the image bits */ +#endif + +}; +#endif /* PNGINFO_H */ diff --git a/ExternalLibs/glpng/png/pnglibconf.h b/ExternalLibs/glpng/png/pnglibconf.h new file mode 100644 index 0000000..a19053a --- /dev/null +++ b/ExternalLibs/glpng/png/pnglibconf.h @@ -0,0 +1,189 @@ + +/* libpng STANDARD API DEFINITION */ + +/* pnglibconf.h - library build configuration */ + +/* Libpng 1.5.7 - December 15, 2011 */ + +/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */ + +/* This code is released under the libpng license. */ +/* For conditions of distribution and use, see the disclaimer */ +/* and license in png.h */ + +/* pnglibconf.h */ +/* Derived from: scripts/pnglibconf.dfa */ +/* If you edit this file by hand you must obey the rules expressed in */ +/* pnglibconf.dfa with respect to the dependencies between the following */ +/* symbols. It is much better to generate a new file using */ +/* scripts/libpngconf.mak */ + +#ifndef PNGLCONF_H +#define PNGLCONF_H +/* settings */ +#define PNG_API_RULE 0 +#define PNG_CALLOC_SUPPORTED +#define PNG_COST_SHIFT 3 +#define PNG_DEFAULT_READ_MACROS 1 +#define PNG_GAMMA_THRESHOLD_FIXED 5000 +#define PNG_MAX_GAMMA_8 11 +#define PNG_QUANTIZE_BLUE_BITS 5 +#define PNG_QUANTIZE_GREEN_BITS 5 +#define PNG_QUANTIZE_RED_BITS 5 +#define PNG_sCAL_PRECISION 5 +#define PNG_USER_CHUNK_CACHE_MAX 0 +#define PNG_USER_CHUNK_MALLOC_MAX 0 +#define PNG_USER_HEIGHT_MAX 1000000 +#define PNG_USER_WIDTH_MAX 1000000 +#define PNG_WEIGHT_SHIFT 8 +#define PNG_ZBUF_SIZE 8192 +/* end of settings */ +/* options */ +#define PNG_16BIT_SUPPORTED +#define PNG_ALIGN_MEMORY_SUPPORTED +#define PNG_BENIGN_ERRORS_SUPPORTED +#define PNG_bKGD_SUPPORTED +#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +#define PNG_CHECK_cHRM_SUPPORTED +#define PNG_cHRM_SUPPORTED +#define PNG_CONSOLE_IO_SUPPORTED +#define PNG_CONVERT_tIME_SUPPORTED +#define PNG_EASY_ACCESS_SUPPORTED +/*#undef PNG_ERROR_NUMBERS_SUPPORTED*/ +#define PNG_ERROR_TEXT_SUPPORTED +#define PNG_FIXED_POINT_SUPPORTED +#define PNG_FLOATING_ARITHMETIC_SUPPORTED +#define PNG_FLOATING_POINT_SUPPORTED +#define PNG_FORMAT_AFIRST_SUPPORTED +#define PNG_FORMAT_BGR_SUPPORTED +#define PNG_gAMA_SUPPORTED +#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +#define PNG_hIST_SUPPORTED +#define PNG_iCCP_SUPPORTED +#define PNG_INCH_CONVERSIONS_SUPPORTED +#define PNG_INFO_IMAGE_SUPPORTED +#define PNG_IO_STATE_SUPPORTED +#define PNG_iTXt_SUPPORTED +#define PNG_MNG_FEATURES_SUPPORTED +#define PNG_oFFs_SUPPORTED +#define PNG_pCAL_SUPPORTED +#define PNG_pHYs_SUPPORTED +#define PNG_POINTER_INDEXING_SUPPORTED +#define PNG_PROGRESSIVE_READ_SUPPORTED +#define PNG_READ_16BIT_SUPPORTED +#define PNG_READ_ALPHA_MODE_SUPPORTED +#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_READ_BACKGROUND_SUPPORTED +#define PNG_READ_BGR_SUPPORTED +#define PNG_READ_bKGD_SUPPORTED +#define PNG_READ_cHRM_SUPPORTED +#define PNG_READ_COMPOSITE_NODIV_SUPPORTED +#define PNG_READ_COMPRESSED_TEXT_SUPPORTED +#define PNG_READ_EXPAND_16_SUPPORTED +#define PNG_READ_EXPAND_SUPPORTED +#define PNG_READ_FILLER_SUPPORTED +#define PNG_READ_gAMA_SUPPORTED +#define PNG_READ_GAMMA_SUPPORTED +#define PNG_READ_GRAY_TO_RGB_SUPPORTED +#define PNG_READ_hIST_SUPPORTED +#define PNG_READ_iCCP_SUPPORTED +#define PNG_READ_INTERLACING_SUPPORTED +#define PNG_READ_INT_FUNCTIONS_SUPPORTED +#define PNG_READ_INVERT_ALPHA_SUPPORTED +#define PNG_READ_INVERT_SUPPORTED +#define PNG_READ_iTXt_SUPPORTED +#define PNG_READ_oFFs_SUPPORTED +#define PNG_READ_OPT_PLTE_SUPPORTED +#define PNG_READ_PACK_SUPPORTED +#define PNG_READ_PACKSWAP_SUPPORTED +#define PNG_READ_pCAL_SUPPORTED +#define PNG_READ_pHYs_SUPPORTED +#define PNG_READ_QUANTIZE_SUPPORTED +#define PNG_READ_RGB_TO_GRAY_SUPPORTED +#define PNG_READ_sBIT_SUPPORTED +#define PNG_READ_SCALE_16_TO_8_SUPPORTED +#define PNG_READ_sCAL_SUPPORTED +#define PNG_READ_SHIFT_SUPPORTED +#define PNG_READ_sPLT_SUPPORTED +#define PNG_READ_sRGB_SUPPORTED +#define PNG_READ_STRIP_16_TO_8_SUPPORTED +#define PNG_READ_STRIP_ALPHA_SUPPORTED +#define PNG_READ_SUPPORTED +#define PNG_READ_SWAP_ALPHA_SUPPORTED +#define PNG_READ_SWAP_SUPPORTED +#define PNG_READ_tEXt_SUPPORTED +#define PNG_READ_TEXT_SUPPORTED +#define PNG_READ_tIME_SUPPORTED +#define PNG_READ_TRANSFORMS_SUPPORTED +#define PNG_READ_tRNS_SUPPORTED +#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_READ_USER_CHUNKS_SUPPORTED +#define PNG_READ_USER_TRANSFORM_SUPPORTED +#define PNG_READ_zTXt_SUPPORTED +#define PNG_SAVE_INT_32_SUPPORTED +#define PNG_sBIT_SUPPORTED +#define PNG_sCAL_SUPPORTED +#define PNG_SEQUENTIAL_READ_SUPPORTED +#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED +#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED +#define PNG_SETJMP_SUPPORTED +#define PNG_SET_USER_LIMITS_SUPPORTED +#define PNG_sPLT_SUPPORTED +#define PNG_sRGB_SUPPORTED +#define PNG_STDIO_SUPPORTED +#define PNG_tEXt_SUPPORTED +#define PNG_TEXT_SUPPORTED +#define PNG_TIME_RFC1123_SUPPORTED +#define PNG_tIME_SUPPORTED +#define PNG_tRNS_SUPPORTED +#define PNG_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_USER_CHUNKS_SUPPORTED +#define PNG_USER_LIMITS_SUPPORTED +#define PNG_USER_MEM_SUPPORTED +#define PNG_USER_TRANSFORM_INFO_SUPPORTED +#define PNG_USER_TRANSFORM_PTR_SUPPORTED +#define PNG_WARNINGS_SUPPORTED +#define PNG_WRITE_16BIT_SUPPORTED +#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED +#define PNG_WRITE_BGR_SUPPORTED +#define PNG_WRITE_bKGD_SUPPORTED +#define PNG_WRITE_cHRM_SUPPORTED +#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED +#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED +#define PNG_WRITE_FILLER_SUPPORTED +#define PNG_WRITE_FILTER_SUPPORTED +#define PNG_WRITE_FLUSH_SUPPORTED +#define PNG_WRITE_gAMA_SUPPORTED +#define PNG_WRITE_hIST_SUPPORTED +#define PNG_WRITE_iCCP_SUPPORTED +#define PNG_WRITE_INTERLACING_SUPPORTED +#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED +#define PNG_WRITE_INVERT_ALPHA_SUPPORTED +#define PNG_WRITE_INVERT_SUPPORTED +#define PNG_WRITE_iTXt_SUPPORTED +#define PNG_WRITE_oFFs_SUPPORTED +#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED +#define PNG_WRITE_PACK_SUPPORTED +#define PNG_WRITE_PACKSWAP_SUPPORTED +#define PNG_WRITE_pCAL_SUPPORTED +#define PNG_WRITE_pHYs_SUPPORTED +#define PNG_WRITE_sBIT_SUPPORTED +#define PNG_WRITE_sCAL_SUPPORTED +#define PNG_WRITE_SHIFT_SUPPORTED +#define PNG_WRITE_sPLT_SUPPORTED +#define PNG_WRITE_sRGB_SUPPORTED +#define PNG_WRITE_SUPPORTED +#define PNG_WRITE_SWAP_ALPHA_SUPPORTED +#define PNG_WRITE_SWAP_SUPPORTED +#define PNG_WRITE_tEXt_SUPPORTED +#define PNG_WRITE_TEXT_SUPPORTED +#define PNG_WRITE_tIME_SUPPORTED +#define PNG_WRITE_TRANSFORMS_SUPPORTED +#define PNG_WRITE_tRNS_SUPPORTED +#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED +#define PNG_WRITE_USER_TRANSFORM_SUPPORTED +#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED +#define PNG_WRITE_zTXt_SUPPORTED +#define PNG_zTXt_SUPPORTED +/* end of options */ +#endif /* PNGLCONF_H */ diff --git a/ExternalLibs/glpng/png/pngmem.c b/ExternalLibs/glpng/png/pngmem.c index 9f2762d..25b5c73 100644 --- a/ExternalLibs/glpng/png/pngmem.c +++ b/ExternalLibs/glpng/png/pngmem.c @@ -1,512 +1,667 @@ - -/* pngmem.c - stub functions for memory allocation - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file provides a location for all memory allocation. Users who - * need special memory handling are expected to supply replacement - * functions for png_malloc() and png_free(), and to use - * png_create_read_struct_2() and png_create_write_struct_2() to - * identify the replacement functions. - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* if you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -png_voidp -png_create_struct(int type) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -png_voidp -png_create_struct_2(int type, png_malloc_ptr malloc_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); - else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); - else - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) - { - if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL) - png_memset(struct_ptr, 0, size); - return (struct_ptr); - } -#endif /* PNG_USER_MEM_SUPPORTED */ - if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL) - { - png_memset(struct_ptr, 0, size); - } - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void -png_destroy_struct(png_voidp struct_ptr) -{ -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn) -{ -#endif - if (struct_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - (*(free_fn))(png_ptr, struct_ptr); - struct_ptr = NULL; - return; - } -#endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); - struct_ptr = NULL; - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. - */ -png_voidp -png_malloc(png_structp png_ptr, png_uint_32 size) -{ -#ifndef PNG_USER_MEM_SUPPORTED - png_voidp ret; -#endif - if (png_ptr == NULL || size == 0) - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - else - return png_malloc_default(png_ptr, size); -} - -png_voidp -png_malloc_default(png_structp png_ptr, png_uint_32 size) -{ - png_voidp ret; -#endif PNG_USER_MEM_SUPPORTED - -#ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - png_error(png_ptr, "Cannot Allocate > 64K"); -#endif - - if (size == (png_uint_32)65536L) - { - if (png_ptr->offset_table == NULL) - { - /* try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i; - png_byte huge * hptr; - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); - if (num_blocks < 1) - num_blocks = 1; - if (png_ptr->zlib_mem_level >= 7) - num_blocks += (int)(1 << (png_ptr->zlib_mem_level - 7)); - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { - png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */ - } - - if ((png_size_t)table & 0xfff0) - { - png_error(png_ptr, "Farmalloc didn't return normalized pointer"); - } - - png_ptr->offset_table = table; - png_ptr->offset_table_ptr = farmalloc(num_blocks * - sizeof (png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { - png_error(png_ptr, "Out Of memory."); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) - { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr += 16L; - } - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr += (png_uint_32)65536L; - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - png_error(png_ptr, "Out of Memory."); - - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - else - ret = farmalloc(size); - - if (ret == NULL) - { - png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */ - } - - return (ret); -} - -/* free a pointer allocated by png_malloc(). In the default - configuration, png_ptr is not used, but is passed in case it - is needed. If ptr is NULL, return without taking any action. */ -void -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - ptr = NULL; - return; - } - else png_free_default(png_ptr, ptr); -} - -void -png_free_default(png_structp png_ptr, png_voidp ptr) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - - if (png_ptr->offset_table != NULL) - { - int i; - - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } - - if (ptr != NULL) - { - farfree(ptr); - ptr = NULL; - } -} - -#else /* Not the Borland DOS special memory handler */ - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably.*/ -png_voidp -png_create_struct(int type) -{ -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL)); -} - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably.*/ -png_voidp -png_create_struct_2(int type, png_malloc_ptr malloc_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); - else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); - else - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) - { - if ((struct_ptr = (*(malloc_fn))(NULL, size)) != NULL) - png_memset(struct_ptr, 0, size); - return (struct_ptr); - } -#endif /* PNG_USER_MEM_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(__FLAT__) - if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL) -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - if ((struct_ptr = (png_voidp)halloc(size,1)) != NULL) -# else - if ((struct_ptr = (png_voidp)malloc(size)) != NULL) -# endif -#endif - { - png_memset(struct_ptr, 0, size); - } - - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void -png_destroy_struct(png_voidp struct_ptr) -{ -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, (png_free_ptr)NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - (*(free_fn))(png_ptr, struct_ptr); - struct_ptr = NULL; - return; - } -#endif /* PNG_USER_MEM_SUPPORTED */ -#if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); - struct_ptr = NULL; -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); - struct_ptr = NULL; -# else - free(struct_ptr); - struct_ptr = NULL; -# endif -#endif - } -} - - -/* Allocate memory. For reasonable files, size should never exceed - 64K. However, zlib may allocate more then 64K if you don't tell - it not to. See zconf.h and png.h for more information. zlib does - need to allocate exactly 64K, so whatever you call here must - have the ability to do that. */ - -png_voidp -png_malloc(png_structp png_ptr, png_uint_32 size) -{ -#ifndef PNG_USER_MEM_SUPPORTED - png_voidp ret; -#endif - if (png_ptr == NULL || size == 0) - return ((png_voidp)NULL); - -#ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - return ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - else - return (png_malloc_default(png_ptr, size)); -} -png_voidp -png_malloc_default(png_structp png_ptr, png_uint_32 size) -{ - png_voidp ret; -#endif /* PNG_USER_MEM_SUPPORTED */ - -#ifdef PNG_MAX_MALLOC_64K - if (size > (png_uint_32)65536L) - png_error(png_ptr, "Cannot Allocate > 64K"); -#endif - -#if defined(__TURBOC__) && !defined(__FLAT__) - ret = farmalloc(size); -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - ret = halloc(size, 1); -# else - ret = malloc((size_t)size); -# endif -#endif - - if (ret == NULL) - { - png_error(png_ptr, "Out of Memory"); - } - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). If ptr is NULL, return - without taking any action. */ -void -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -#ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - ptr = NULL; - return; - } - else png_free_default(png_ptr, ptr); -} -void -png_free_default(png_structp png_ptr, png_voidp ptr) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - -#if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); - ptr = NULL; -#else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); - ptr = NULL; -# else - free(ptr); - ptr = NULL; -# endif -#endif -} - -#endif /* Not Borland DOS special memory handler */ - -png_voidp -png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2, - png_uint_32 length) -{ - png_size_t size; - - size = (png_size_t)length; - if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memcpy_check."); - - return(png_memcpy (s1, s2, size)); -} - -png_voidp -png_memset_check (png_structp png_ptr, png_voidp s1, int value, - png_uint_32 length) -{ - png_size_t size; - - size = (png_size_t)length; - if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memset_check."); - - return (png_memset (s1, value, size)); - -} - -#ifdef PNG_USER_MEM_SUPPORTED -/* This function is called when the application wants to use another method - * of allocating and freeing memory. - */ -void -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr free_fn) -{ - png_ptr->mem_ptr = mem_ptr; - png_ptr->malloc_fn = malloc_fn; - png_ptr->free_fn = free_fn; -} - -/* This function returns a pointer to the mem_ptr associated with the user - * functions. The application should free any memory associated with this - * pointer before png_write_destroy and png_read_destroy are called. - */ -png_voidp -png_get_mem_ptr(png_structp png_ptr) -{ - return ((png_voidp)png_ptr->mem_ptr); -} -#endif /* PNG_USER_MEM_SUPPORTED */ - + +/* pngmem.c - stub functions for memory allocation + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file provides a location for all memory allocation. Users who + * need special memory handling are expected to supply replacement + * functions for png_malloc() and png_free(), and to use + * png_create_read_struct_2() and png_create_write_struct_2() to + * identify the replacement functions. + */ + +#include "pngpriv.h" + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +/* Borland DOS special memory handler */ +#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) +/* If you change this, be sure to change the one in png.h also */ + +/* Allocate memory for a png_struct. The malloc and memset can be replaced + by a single call to calloc() if this is thought to improve performance. */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct,(int type),PNG_ALLOCATED) +{ +# ifdef PNG_USER_MEM_SUPPORTED + return (png_create_struct_2(type, NULL, NULL)); +} + +/* Alternate version of png_create_struct, for use with user-defined malloc. */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), + PNG_ALLOCATED) +{ +# endif /* PNG_USER_MEM_SUPPORTED */ + png_size_t size; + png_voidp struct_ptr; + + if (type == PNG_STRUCT_INFO) + size = png_sizeof(png_info); + + else if (type == PNG_STRUCT_PNG) + size = png_sizeof(png_struct); + + else + return (png_get_copyright(NULL)); + +# ifdef PNG_USER_MEM_SUPPORTED + if (malloc_fn != NULL) + { + png_struct dummy_struct; + memset(&dummy_struct, 0, sizeof dummy_struct); + dummy_struct.mem_ptr=mem_ptr; + struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); + } + + else +# endif /* PNG_USER_MEM_SUPPORTED */ + struct_ptr = (png_voidp)farmalloc(size); + if (struct_ptr != NULL) + png_memset(struct_ptr, 0, size); + + return (struct_ptr); +} + +/* Free memory allocated by a png_create_struct() call */ +void /* PRIVATE */ +png_destroy_struct(png_voidp struct_ptr) +{ +# ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2(struct_ptr, NULL, NULL); +} + +/* Free memory allocated by a png_create_struct() call */ +void /* PRIVATE */ +png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, + png_voidp mem_ptr) +{ +# endif + if (struct_ptr != NULL) + { +# ifdef PNG_USER_MEM_SUPPORTED + if (free_fn != NULL) + { + png_struct dummy_struct; + memset(&dummy_struct, 0, sizeof dummy_struct); + dummy_struct.mem_ptr=mem_ptr; + (*(free_fn))(&dummy_struct, struct_ptr); + return; + } + +# endif /* PNG_USER_MEM_SUPPORTED */ + farfree (struct_ptr); + } +} + +/* Allocate memory. For reasonable files, size should never exceed + * 64K. However, zlib may allocate more then 64K if you don't tell + * it not to. See zconf.h and png.h for more information. zlib does + * need to allocate exactly 64K, so whatever you call here must + * have the ability to do that. + * + * Borland seems to have a problem in DOS mode for exactly 64K. + * It gives you a segment with an offset of 8 (perhaps to store its + * memory stuff). zlib doesn't like this at all, so we have to + * detect and deal with it. This code should not be needed in + * Windows or OS/2 modes, and only in 16 bit mode. This code has + * been updated by Alexander Lehmann for version 0.89 to waste less + * memory. + * + * Note that we can't use png_size_t for the "size" declaration, + * since on some systems a png_size_t is a 16-bit quantity, and as a + * result, we would be truncating potentially larger memory requests + * (which should cause a fatal error) and introducing major problems. + */ +PNG_FUNCTION(png_voidp,PNGAPI +png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; + + ret = (png_malloc(png_ptr, size)); + + if (ret != NULL) + png_memset(ret,0,(png_size_t)size); + + return (ret); +} + +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; + + if (png_ptr == NULL || size == 0) + return (NULL); + +# ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr->malloc_fn != NULL) + ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); + + else + ret = (png_malloc_default(png_ptr, size)); + + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of memory"); + + return (ret); +} + +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; +# endif /* PNG_USER_MEM_SUPPORTED */ + + if (png_ptr == NULL || size == 0) + return (NULL); + +# ifdef PNG_MAX_MALLOC_64K + if (size > (png_uint_32)65536L) + { + png_warning(png_ptr, "Cannot Allocate > 64K"); + ret = NULL; + } + + else +# endif + + if (size != (size_t)size) + ret = NULL; + + else if (size == (png_uint_32)65536L) + { + if (png_ptr->offset_table == NULL) + { + /* Try to see if we need to do any of this fancy stuff */ + ret = farmalloc(size); + if (ret == NULL || ((png_size_t)ret & 0xffff)) + { + int num_blocks; + png_uint_32 total_size; + png_bytep table; + int i, mem_level, window_bits; + png_byte huge * hptr; + int window_bits + + if (ret != NULL) + { + farfree(ret); + ret = NULL; + } + + window_bits = + png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? + png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; + + if (window_bits > 14) + num_blocks = (int)(1 << (window_bits - 14)); + + else + num_blocks = 1; + + mem_level = + png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? + png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; + + if (mem_level >= 7) + num_blocks += (int)(1 << (mem_level - 7)); + + else + num_blocks++; + + total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; + + table = farmalloc(total_size); + + if (table == NULL) + { +# ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ + + else + png_warning(png_ptr, "Out Of Memory"); +# endif + return (NULL); + } + + if ((png_size_t)table & 0xfff0) + { +# ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, + "Farmalloc didn't return normalized pointer"); + + else + png_warning(png_ptr, + "Farmalloc didn't return normalized pointer"); +# endif + return (NULL); + } + + png_ptr->offset_table = table; + png_ptr->offset_table_ptr = farmalloc(num_blocks * + png_sizeof(png_bytep)); + + if (png_ptr->offset_table_ptr == NULL) + { +# ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ + + else + png_warning(png_ptr, "Out Of memory"); +# endif + return (NULL); + } + + hptr = (png_byte huge *)table; + if ((png_size_t)hptr & 0xf) + { + hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); + hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ + } + + for (i = 0; i < num_blocks; i++) + { + png_ptr->offset_table_ptr[i] = (png_bytep)hptr; + hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ + } + + png_ptr->offset_table_number = num_blocks; + png_ptr->offset_table_count = 0; + png_ptr->offset_table_count_free = 0; + } + } + + if (png_ptr->offset_table_count >= png_ptr->offset_table_number) + { +# ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ + + else + png_warning(png_ptr, "Out of Memory"); +# endif + return (NULL); + } + + ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; + } + + else + ret = farmalloc(size); + +# ifndef PNG_USER_MEM_SUPPORTED + if (ret == NULL) + { + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of memory"); /* Note "o" and "m" */ + + else + png_warning(png_ptr, "Out of memory"); /* Note "o" and "m" */ + } +# endif + + return (ret); +} + +/* Free a pointer allocated by png_malloc(). In the default + * configuration, png_ptr is not used, but is passed in case it + * is needed. If ptr is NULL, return without taking any action. + */ +void PNGAPI +png_free(png_structp png_ptr, png_voidp ptr) +{ + if (png_ptr == NULL || ptr == NULL) + return; + +# ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr->free_fn != NULL) + { + (*(png_ptr->free_fn))(png_ptr, ptr); + return; + } + + else + png_free_default(png_ptr, ptr); +} + +void PNGAPI +png_free_default(png_structp png_ptr, png_voidp ptr) +{ +# endif /* PNG_USER_MEM_SUPPORTED */ + + if (png_ptr == NULL || ptr == NULL) + return; + + if (png_ptr->offset_table != NULL) + { + int i; + + for (i = 0; i < png_ptr->offset_table_count; i++) + { + if (ptr == png_ptr->offset_table_ptr[i]) + { + ptr = NULL; + png_ptr->offset_table_count_free++; + break; + } + } + if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) + { + farfree(png_ptr->offset_table); + farfree(png_ptr->offset_table_ptr); + png_ptr->offset_table = NULL; + png_ptr->offset_table_ptr = NULL; + } + } + + if (ptr != NULL) + farfree(ptr); +} + +#else /* Not the Borland DOS special memory handler */ + +/* Allocate memory for a png_struct or a png_info. The malloc and + memset can be replaced by a single call to calloc() if this is thought + to improve performance noticably. */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct,(int type),PNG_ALLOCATED) +{ +# ifdef PNG_USER_MEM_SUPPORTED + return (png_create_struct_2(type, NULL, NULL)); +} + +/* Allocate memory for a png_struct or a png_info. The malloc and + memset can be replaced by a single call to calloc() if this is thought + to improve performance noticably. */ +PNG_FUNCTION(png_voidp /* PRIVATE */, +png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), + PNG_ALLOCATED) +{ +# endif /* PNG_USER_MEM_SUPPORTED */ + png_size_t size; + png_voidp struct_ptr; + + if (type == PNG_STRUCT_INFO) + size = png_sizeof(png_info); + + else if (type == PNG_STRUCT_PNG) + size = png_sizeof(png_struct); + + else + return (NULL); + +# ifdef PNG_USER_MEM_SUPPORTED + if (malloc_fn != NULL) + { + png_struct dummy_struct; + png_structp png_ptr = &dummy_struct; + png_ptr->mem_ptr=mem_ptr; + struct_ptr = (*(malloc_fn))(png_ptr, size); + + if (struct_ptr != NULL) + png_memset(struct_ptr, 0, size); + + return (struct_ptr); + } +# endif /* PNG_USER_MEM_SUPPORTED */ + +# if defined(__TURBOC__) && !defined(__FLAT__) + struct_ptr = (png_voidp)farmalloc(size); +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) + struct_ptr = (png_voidp)halloc(size, 1); +# else + struct_ptr = (png_voidp)malloc(size); +# endif +# endif + + if (struct_ptr != NULL) + png_memset(struct_ptr, 0, size); + + return (struct_ptr); +} + + +/* Free memory allocated by a png_create_struct() call */ +void /* PRIVATE */ +png_destroy_struct(png_voidp struct_ptr) +{ +# ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2(struct_ptr, NULL, NULL); +} + +/* Free memory allocated by a png_create_struct() call */ +void /* PRIVATE */ +png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, + png_voidp mem_ptr) +{ +# endif /* PNG_USER_MEM_SUPPORTED */ + if (struct_ptr != NULL) + { +# ifdef PNG_USER_MEM_SUPPORTED + if (free_fn != NULL) + { + png_struct dummy_struct; + png_structp png_ptr = &dummy_struct; + png_ptr->mem_ptr=mem_ptr; + (*(free_fn))(png_ptr, struct_ptr); + return; + } +# endif /* PNG_USER_MEM_SUPPORTED */ +# if defined(__TURBOC__) && !defined(__FLAT__) + farfree(struct_ptr); + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) + hfree(struct_ptr); + +# else + free(struct_ptr); + +# endif +# endif + } +} + +/* Allocate memory. For reasonable files, size should never exceed + * 64K. However, zlib may allocate more then 64K if you don't tell + * it not to. See zconf.h and png.h for more information. zlib does + * need to allocate exactly 64K, so whatever you call here must + * have the ability to do that. + */ + +PNG_FUNCTION(png_voidp,PNGAPI +png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; + + ret = (png_malloc(png_ptr, size)); + + if (ret != NULL) + png_memset(ret,0,(png_size_t)size); + + return (ret); +} + +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; + +# ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr == NULL || size == 0) + return (NULL); + + if (png_ptr->malloc_fn != NULL) + ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); + + else + ret = (png_malloc_default(png_ptr, size)); + + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of Memory"); + + return (ret); +} + +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ret; +# endif /* PNG_USER_MEM_SUPPORTED */ + + if (png_ptr == NULL || size == 0) + return (NULL); + +# ifdef PNG_MAX_MALLOC_64K + if (size > (png_uint_32)65536L) + { +# ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Cannot Allocate > 64K"); + + else +# endif + return NULL; + } +# endif + + /* Check for overflow */ +# if defined(__TURBOC__) && !defined(__FLAT__) + + if (size != (unsigned long)size) + ret = NULL; + + else + ret = farmalloc(size); + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) + if (size != (unsigned long)size) + ret = NULL; + + else + ret = halloc(size, 1); + +# else + if (size != (size_t)size) + ret = NULL; + + else + ret = malloc((size_t)size); +# endif +# endif + +# ifndef PNG_USER_MEM_SUPPORTED + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of Memory"); +# endif + + return (ret); +} + +/* Free a pointer allocated by png_malloc(). If ptr is NULL, return + * without taking any action. + */ +void PNGAPI +png_free(png_structp png_ptr, png_voidp ptr) +{ + if (png_ptr == NULL || ptr == NULL) + return; + +# ifdef PNG_USER_MEM_SUPPORTED + if (png_ptr->free_fn != NULL) + { + (*(png_ptr->free_fn))(png_ptr, ptr); + return; + } + + else + png_free_default(png_ptr, ptr); +} + +void PNGAPI +png_free_default(png_structp png_ptr, png_voidp ptr) +{ + if (png_ptr == NULL || ptr == NULL) + return; + +# endif /* PNG_USER_MEM_SUPPORTED */ + +# if defined(__TURBOC__) && !defined(__FLAT__) + farfree(ptr); + +# else +# if defined(_MSC_VER) && defined(MAXSEG_64K) + hfree(ptr); + +# else + free(ptr); + +# endif +# endif +} +#endif /* Not Borland DOS special memory handler */ + +/* This function was added at libpng version 1.2.3. The png_malloc_warn() + * function will set up png_malloc() to issue a png_warning and return NULL + * instead of issuing a png_error, if it fails to allocate the requested + * memory. + */ +PNG_FUNCTION(png_voidp,PNGAPI +png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) +{ + png_voidp ptr; + png_uint_32 save_flags; + if (png_ptr == NULL) + return (NULL); + + save_flags = png_ptr->flags; + png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; + ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); + png_ptr->flags=save_flags; + return(ptr); +} + + +#ifdef PNG_USER_MEM_SUPPORTED +/* This function is called when the application wants to use another method + * of allocating and freeing memory. + */ +void PNGAPI +png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr + malloc_fn, png_free_ptr free_fn) +{ + if (png_ptr != NULL) + { + png_ptr->mem_ptr = mem_ptr; + png_ptr->malloc_fn = malloc_fn; + png_ptr->free_fn = free_fn; + } +} + +/* This function returns a pointer to the mem_ptr associated with the user + * functions. The application should free any memory associated with this + * pointer before png_write_destroy and png_read_destroy are called. + */ +png_voidp PNGAPI +png_get_mem_ptr(png_const_structp png_ptr) +{ + if (png_ptr == NULL) + return (NULL); + + return ((png_voidp)png_ptr->mem_ptr); +} +#endif /* PNG_USER_MEM_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngpread.c b/ExternalLibs/glpng/png/pngpread.c index 9330223..ca7607a 100644 --- a/ExternalLibs/glpng/png/pngpread.c +++ b/ExternalLibs/glpng/png/pngpread.c @@ -1,1144 +1,1846 @@ - -/* pngpread.c - read a png file in push mode - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - */ - -#define PNG_INTERNAL -#include "png.h" - -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - -void -png_process_data(png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size) -{ - png_push_restore_buffer(png_ptr, buffer, buffer_size); - - while (png_ptr->buffer_size) - { - png_process_some_data(png_ptr, info_ptr); - } -} - -/* What we do with the incoming data depends on what we were previously - * doing before we ran out of data... - */ -void -png_process_some_data(png_structp png_ptr, png_infop info_ptr) -{ - switch (png_ptr->process_mode) - { - case PNG_READ_SIG_MODE: - { - png_push_read_sig(png_ptr, info_ptr); - break; - } - case PNG_READ_CHUNK_MODE: - { - png_push_read_chunk(png_ptr, info_ptr); - break; - } - case PNG_READ_IDAT_MODE: - { - png_push_read_IDAT(png_ptr); - break; - } -#if defined(PNG_READ_tEXt_SUPPORTED) - case PNG_READ_tEXt_MODE: - { - png_push_read_tEXt(png_ptr, info_ptr); - break; - } -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - case PNG_READ_zTXt_MODE: - { - png_push_read_zTXt(png_ptr, info_ptr); - break; - } -#endif - case PNG_SKIP_MODE: - { - png_push_crc_finish(png_ptr); - break; - } - default: - { - png_ptr->buffer_size = 0; - break; - } - } -} - -/* Read any remaining signature bytes from the stream and compare them with - * the correct PNG signature. It is possible that this routine is called - * with bytes already read from the signature, either because they have been - * checked by the calling application, or because of multiple calls to this - * routine. - */ -void -png_push_read_sig(png_structp png_ptr, png_infop info_ptr) -{ - png_size_t num_checked = png_ptr->sig_bytes, - num_to_check = 8 - num_checked; - - if (png_ptr->buffer_size < num_to_check) - { - num_to_check = png_ptr->buffer_size; - } - - png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]), - num_to_check); - png_ptr->sig_bytes += num_to_check; - - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - else - { - if (png_ptr->sig_bytes >= 8) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - } - } -} - -void -png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) -{ - /* First we make sure we have enough data for the 4 byte chunk name - * and the 4 byte chunk length before proceeding with decoding the - * chunk data. To fully decode each of these chunks, we also make - * sure we have enough data in the buffer for the 4 byte CRC at the - * end of every chunk (except IDAT, which is handled separately). - */ - if (!(png_ptr->flags & PNG_FLAG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_fill_buffer(png_ptr, chunk_length, 4); - png_ptr->push_length = png_get_uint_32(chunk_length); - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER; - } - - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length); - } - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length); - } - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - /* If we reach an IDAT chunk, this means we have read all of the - * header chunks, and we can start reading the image (or if this - * is called after the image has been read - we have an error). - */ - if (png_ptr->mode & PNG_HAVE_IDAT) - { - if (png_ptr->push_length == 0) - return; - - if (png_ptr->mode & PNG_AFTER_IDAT) - png_error(png_ptr, "Too many IDAT's found"); - } - - png_ptr->idat_size = png_ptr->push_length; - png_ptr->mode |= PNG_HAVE_IDAT; - png_ptr->process_mode = PNG_READ_IDAT_MODE; - png_push_have_info(png_ptr, info_ptr); - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - png_ptr->zstream.next_out = png_ptr->row_buf; - return; - } - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length); - png_ptr->process_mode = PNG_READ_DONE_MODE; - png_push_have_end(png_ptr, info_ptr); - } -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) - { - png_push_save_buffer(png_ptr); - return; - } - - png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - { - png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length); - } -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - { - png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length); - } -#endif - else - { - png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); - } - - png_ptr->flags &= ~PNG_FLAG_HAVE_CHUNK_HEADER; -} - -void -png_push_crc_skip(png_structp png_ptr, png_uint_32 skip) -{ - png_ptr->process_mode = PNG_SKIP_MODE; - png_ptr->skip_length = skip; -} - -void -png_push_crc_finish(png_structp png_ptr) -{ - if (png_ptr->skip_length && png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (png_ptr->skip_length < (png_uint_32)png_ptr->save_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; - else - save_size = png_ptr->save_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); - - png_ptr->skip_length -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (png_ptr->skip_length && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (png_ptr->skip_length < (png_uint_32)png_ptr->current_buffer_size) - save_size = (png_size_t)png_ptr->skip_length; - else - save_size = png_ptr->current_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); - - png_ptr->skip_length -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } - if (!png_ptr->skip_length) - { - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_crc_finish(png_ptr, 0); - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - } -} - -void -png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) -{ - png_bytep ptr; - - ptr = buffer; - if (png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (length < png_ptr->save_buffer_size) - save_size = length; - else - save_size = png_ptr->save_buffer_size; - - png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size); - length -= save_size; - ptr += save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (length && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (length < png_ptr->current_buffer_size) - save_size = length; - else - save_size = png_ptr->current_buffer_size; - - png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size); - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } -} - -void -png_push_save_buffer(png_structp png_ptr) -{ - if (png_ptr->save_buffer_size) - { - if (png_ptr->save_buffer_ptr != png_ptr->save_buffer) - { - png_size_t i,istop; - png_bytep sp; - png_bytep dp; - - istop = png_ptr->save_buffer_size; - for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer; - i < istop; i++, sp++, dp++) - { - *dp = *sp; - } - } - } - if (png_ptr->save_buffer_size + png_ptr->current_buffer_size > - png_ptr->save_buffer_max) - { - png_size_t new_max; - png_bytep old_buffer; - - new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; - old_buffer = png_ptr->save_buffer; - png_ptr->save_buffer = (png_bytep)png_malloc(png_ptr, - (png_uint_32)new_max); - png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); - png_free(png_ptr, old_buffer); - png_ptr->save_buffer_max = new_max; - } - if (png_ptr->current_buffer_size) - { - png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size, - png_ptr->current_buffer_ptr, png_ptr->current_buffer_size); - png_ptr->save_buffer_size += png_ptr->current_buffer_size; - png_ptr->current_buffer_size = 0; - } - png_ptr->save_buffer_ptr = png_ptr->save_buffer; - png_ptr->buffer_size = 0; -} - -void -png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, - png_size_t buffer_length) -{ - png_ptr->current_buffer = buffer; - png_ptr->current_buffer_size = buffer_length; - png_ptr->buffer_size = buffer_length + png_ptr->save_buffer_size; - png_ptr->current_buffer_ptr = png_ptr->current_buffer; -} - -void -png_push_read_IDAT(png_structp png_ptr) -{ - if (!(png_ptr->flags & PNG_FLAG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - - if (png_ptr->buffer_size < 8) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_fill_buffer(png_ptr, chunk_length, 4); - png_ptr->push_length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->flags |= PNG_FLAG_HAVE_CHUNK_HEADER; - - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - png_error(png_ptr, "Not enough compressed data"); - return; - } - - png_ptr->idat_size = png_ptr->push_length; - } - if (png_ptr->idat_size && png_ptr->save_buffer_size) - { - png_size_t save_size; - - if (png_ptr->idat_size < (png_uint_32)png_ptr->save_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; - /* check for overflow */ - if((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } - else - save_size = png_ptr->save_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); - png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size); - - png_ptr->idat_size -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->save_buffer_size -= save_size; - png_ptr->save_buffer_ptr += save_size; - } - if (png_ptr->idat_size && png_ptr->current_buffer_size) - { - png_size_t save_size; - - if (png_ptr->idat_size < (png_uint_32)png_ptr->current_buffer_size) - { - save_size = (png_size_t)png_ptr->idat_size; - /* check for overflow */ - if((png_uint_32)save_size != png_ptr->idat_size) - png_error(png_ptr, "save_size overflowed in pngpread"); - } - else - save_size = png_ptr->current_buffer_size; - - png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); - png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size); - - png_ptr->idat_size -= save_size; - png_ptr->buffer_size -= save_size; - png_ptr->current_buffer_size -= save_size; - png_ptr->current_buffer_ptr += save_size; - } - if (!png_ptr->idat_size) - { - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_crc_finish(png_ptr, 0); - png_ptr->flags &= ~PNG_FLAG_HAVE_CHUNK_HEADER; - } -} - -void -png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, - png_size_t buffer_length) -{ - int ret; - - if ((png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) && buffer_length) - png_error(png_ptr, "Extra compression data"); - - png_ptr->zstream.next_in = buffer; - png_ptr->zstream.avail_in = (uInt)buffer_length; - for(;;) - { - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_in) - png_error(png_ptr, "Extra compressed data"); - if (!(png_ptr->zstream.avail_out)) - { - png_push_process_row(png_ptr); - } - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - else if (ret == Z_BUF_ERROR) - break; - else if (ret != Z_OK) - png_error(png_ptr, "Decompression Error"); - if (!(png_ptr->zstream.avail_out)) - { - png_push_process_row(png_ptr); - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - png_ptr->zstream.next_out = png_ptr->row_buf; - } - else - break; - } -} - -void -png_push_process_row(png_structp png_ptr) -{ - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; - - png_ptr->row_info.rowbytes = ((png_ptr->row_info.width * - (png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3); - - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); - - png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, - png_ptr->rowbytes + 1); - - if (png_ptr->transformations) - png_do_read_transformations(png_ptr); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* blow up interlaced rows to full size */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - if (png_ptr->pass < 6) - png_do_read_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - - switch (png_ptr->pass) - { - case 0: - { - int i; - for (i = 0; i < 8 && png_ptr->pass == 0; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - break; - } - case 1: - { - int i; - for (i = 0; i < 8 && png_ptr->pass == 1; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 2) - { - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 2: - { - int i; - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - for (i = 0; i < 4 && png_ptr->pass == 2; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - break; - } - case 3: - { - int i; - for (i = 0; i < 4 && png_ptr->pass == 3; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 4) - { - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - break; - } - case 4: - { - int i; - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - for (i = 0; i < 2 && png_ptr->pass == 4; i++) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - break; - } - case 5: - { - int i; - for (i = 0; i < 2 && png_ptr->pass == 5; i++) - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } - if (png_ptr->pass == 6) - { - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - break; - } - case 6: - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - if (png_ptr->pass != 6) - break; - png_push_have_row(png_ptr, NULL); - png_read_push_finish_row(png_ptr); - } - } - } - else -#endif - { - png_push_have_row(png_ptr, png_ptr->row_buf + 1); - png_read_push_finish_row(png_ptr); - } -} - -void -png_read_push_finish_row(png_structp png_ptr) -{ - png_ptr->row_number++; - if (png_ptr->row_number < png_ptr->num_rows) - return; - - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - png_memset_check(png_ptr, png_ptr->prev_row, 0, - png_ptr->rowbytes + 1); - do - { - png_ptr->pass++; - if (png_ptr->pass >= 7) - break; - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - png_ptr->irowbytes = ((png_ptr->iwidth * - png_ptr->pixel_depth + 7) >> 3) + 1; - - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - if (!(png_ptr->num_rows)) - continue; - } - if (png_ptr->transformations & PNG_INTERLACE) - break; - } while (png_ptr->iwidth == 0); - } -} - -#if defined(PNG_READ_tEXt_SUPPORTED) -void -png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND) - { - png_error(png_ptr, "Out of place tEXt"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - -#ifdef PNG_MAX_MALLOC_64K - png_ptr->skip_length = 0; /* This may not be necessary */ - - if (length > (png_uint_32)65535L) /* Can't hold the entire string in memory */ - { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - png_ptr->skip_length = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(length+1)); - png_ptr->current_text[length] = '\0'; - png_ptr->current_text_ptr = png_ptr->current_text; - png_ptr->current_text_size = (png_size_t)length; - png_ptr->current_text_left = (png_size_t)length; - png_ptr->process_mode = PNG_READ_tEXt_MODE; -} - -void -png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->buffer_size && png_ptr->current_text_left) - { - png_size_t text_size; - - if (png_ptr->buffer_size < png_ptr->current_text_left) - text_size = png_ptr->buffer_size; - else - text_size = png_ptr->current_text_left; - png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); - png_ptr->current_text_left -= text_size; - png_ptr->current_text_ptr += text_size; - } - if (!(png_ptr->current_text_left)) - { - png_textp text_ptr; - png_charp text; - png_charp key; - - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_crc_finish(png_ptr); - -#if defined(PNG_MAX_MALLOC_64K) - if (png_ptr->skip_length) - return; -#endif - - key = png_ptr->current_text; - png_ptr->current_text = 0; - - for (text = key; *text; text++) - /* empty loop */ ; - - if (text != key + png_ptr->current_text_size) - text++; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - } -} -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -void -png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - if (png_ptr->mode == PNG_BEFORE_IHDR || png_ptr->mode & PNG_HAVE_IEND) - { - png_error(png_ptr, "Out of place zTXt"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - -#ifdef PNG_MAX_MALLOC_64K - /* We can't handle zTXt chunks > 64K, since we don't have enough space - * to be able to store the uncompressed data. Actually, the threshold - * is probably around 32K, but it isn't as definite as 64K is. - */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "zTXt chunk too large to fit in memory"); - png_push_crc_skip(png_ptr, length); - return; - } -#endif - - png_ptr->current_text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(length+1)); - png_ptr->current_text[length] = '\0'; - png_ptr->current_text_ptr = png_ptr->current_text; - png_ptr->current_text_size = (png_size_t)length; - png_ptr->current_text_left = (png_size_t)length; - png_ptr->process_mode = PNG_READ_zTXt_MODE; -} - -void -png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->buffer_size && png_ptr->current_text_left) - { - png_size_t text_size; - - if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left) - text_size = png_ptr->buffer_size; - else - text_size = png_ptr->current_text_left; - png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); - png_ptr->current_text_left -= text_size; - png_ptr->current_text_ptr += text_size; - } - if (!(png_ptr->current_text_left)) - { - png_textp text_ptr; - png_charp text; - png_charp key; - int ret; - png_size_t text_size, key_size; - - if (png_ptr->buffer_size < 4) - { - png_push_save_buffer(png_ptr); - return; - } - - png_push_crc_finish(png_ptr); - - key = png_ptr->current_text; - png_ptr->current_text = 0; - - for (text = key; *text; text++) - /* empty loop */ ; - - /* zTXt can't have zero text */ - if (text == key + png_ptr->current_text_size) - { - png_free(png_ptr, key); - return; - } - - text++; - - if (*text != PNG_TEXT_COMPRESSION_zTXt) /* check compression byte */ - { - png_free(png_ptr, key); - return; - } - - text++; - - png_ptr->zstream.next_in = (png_bytep )text; - png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size - - (text - key)); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - key_size = text - key; - text_size = 0; - text = NULL; - ret = Z_STREAM_END; - - while (png_ptr->zstream.avail_in) - { - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret != Z_OK && ret != Z_STREAM_END) - { - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - png_free(png_ptr, key); - png_free(png_ptr, text); - return; - } - if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END) - { - if (text == NULL) - { - text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out + - key_size + 1)); - png_memcpy(text + key_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - png_memcpy(text, key, key_size); - text_size = key_size + png_ptr->zbuf_size - - png_ptr->zstream.avail_out; - *(text + text_size) = '\0'; - } - else - { - png_charp tmp; - - tmp = text; - text = (png_charp)png_malloc(png_ptr, text_size + - (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out - + 1)); - png_memcpy(text, tmp, text_size); - png_free(png_ptr, tmp); - png_memcpy(text + text_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; - *(text + text_size) = '\0'; - } - if (ret != Z_STREAM_END) - { - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - } - else - { - break; - } - - if (ret == Z_STREAM_END) - break; - } - - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - if (ret != Z_STREAM_END) - { - png_free(png_ptr, key); - png_free(png_ptr, text); - return; - } - - png_free(png_ptr, key); - key = text; - text += key_size; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt; - text_ptr->key = key; - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); - } -} -#endif - -/* This function is called when we haven't found a handler for this - * chunk. In the future we will have code here that can handle - * user-defined callback functions for unknown chunks before they are - * ignored or cause an error. If there isn't a problem with the - * chunk itself (ie a bad chunk name or a critical chunk), the chunk - * is (currently) silently ignored. - */ -void -png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_check_chunk_name(png_ptr, png_ptr->chunk_name); - - if (!(png_ptr->chunk_name[0] & 0x20)) - { - png_chunk_error(png_ptr, "unknown critical chunk"); - /* to quiet some compiler warnings */ - if(info_ptr == NULL) return; - } - - png_push_crc_skip(png_ptr, length); -} - -void -png_push_have_info(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->info_fn != NULL) - (*(png_ptr->info_fn))(png_ptr, info_ptr); -} - -void -png_push_have_end(png_structp png_ptr, png_infop info_ptr) -{ - if (png_ptr->end_fn != NULL) - (*(png_ptr->end_fn))(png_ptr, info_ptr); -} - -void -png_push_have_row(png_structp png_ptr, png_bytep row) -{ - if (png_ptr->row_fn != NULL) - (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, - (int)png_ptr->pass); -} - -void -png_progressive_combine_row (png_structp png_ptr, - png_bytep old_row, png_bytep new_row) -{ - if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */ - png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]); -} - -void -png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn) -{ - png_ptr->info_fn = info_fn; - png_ptr->row_fn = row_fn; - png_ptr->end_fn = end_fn; - - png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); -} - -png_voidp -png_get_progressive_ptr(png_structp png_ptr) -{ - return png_ptr->io_ptr; -} - -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ - - + +/* pngpread.c - read a png file in push mode + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "pngpriv.h" + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + +/* Push model modes */ +#define PNG_READ_SIG_MODE 0 +#define PNG_READ_CHUNK_MODE 1 +#define PNG_READ_IDAT_MODE 2 +#define PNG_SKIP_MODE 3 +#define PNG_READ_tEXt_MODE 4 +#define PNG_READ_zTXt_MODE 5 +#define PNG_READ_DONE_MODE 6 +#define PNG_READ_iTXt_MODE 7 +#define PNG_ERROR_MODE 8 + +void PNGAPI +png_process_data(png_structp png_ptr, png_infop info_ptr, + png_bytep buffer, png_size_t buffer_size) +{ + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_push_restore_buffer(png_ptr, buffer, buffer_size); + + while (png_ptr->buffer_size) + { + png_process_some_data(png_ptr, info_ptr); + } +} + +png_size_t PNGAPI +png_process_data_pause(png_structp png_ptr, int save) +{ + if (png_ptr != NULL) + { + /* It's easiest for the caller if we do the save, then the caller doesn't + * have to supply the same data again: + */ + if (save) + png_push_save_buffer(png_ptr); + else + { + /* This includes any pending saved bytes: */ + png_size_t remaining = png_ptr->buffer_size; + png_ptr->buffer_size = 0; + + /* So subtract the saved buffer size, unless all the data + * is actually 'saved', in which case we just return 0 + */ + if (png_ptr->save_buffer_size < remaining) + return remaining - png_ptr->save_buffer_size; + } + } + + return 0; +} + +png_uint_32 PNGAPI +png_process_data_skip(png_structp png_ptr) +{ + png_uint_32 remaining = 0; + + if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE && + png_ptr->skip_length > 0) + { + /* At the end of png_process_data the buffer size must be 0 (see the loop + * above) so we can detect a broken call here: + */ + if (png_ptr->buffer_size != 0) + png_error(png_ptr, + "png_process_data_skip called inside png_process_data"); + + /* If is impossible for there to be a saved buffer at this point - + * otherwise we could not be in SKIP mode. This will also happen if + * png_process_skip is called inside png_process_data (but only very + * rarely.) + */ + if (png_ptr->save_buffer_size != 0) + png_error(png_ptr, "png_process_data_skip called with saved data"); + + remaining = png_ptr->skip_length; + png_ptr->skip_length = 0; + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + } + + return remaining; +} + +/* What we do with the incoming data depends on what we were previously + * doing before we ran out of data... + */ +void /* PRIVATE */ +png_process_some_data(png_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr == NULL) + return; + + switch (png_ptr->process_mode) + { + case PNG_READ_SIG_MODE: + { + png_push_read_sig(png_ptr, info_ptr); + break; + } + + case PNG_READ_CHUNK_MODE: + { + png_push_read_chunk(png_ptr, info_ptr); + break; + } + + case PNG_READ_IDAT_MODE: + { + png_push_read_IDAT(png_ptr); + break; + } + +#ifdef PNG_READ_tEXt_SUPPORTED + case PNG_READ_tEXt_MODE: + { + png_push_read_tEXt(png_ptr, info_ptr); + break; + } + +#endif +#ifdef PNG_READ_zTXt_SUPPORTED + case PNG_READ_zTXt_MODE: + { + png_push_read_zTXt(png_ptr, info_ptr); + break; + } + +#endif +#ifdef PNG_READ_iTXt_SUPPORTED + case PNG_READ_iTXt_MODE: + { + png_push_read_iTXt(png_ptr, info_ptr); + break; + } + +#endif + case PNG_SKIP_MODE: + { + png_push_crc_finish(png_ptr); + break; + } + + default: + { + png_ptr->buffer_size = 0; + break; + } + } +} + +/* Read any remaining signature bytes from the stream and compare them with + * the correct PNG signature. It is possible that this routine is called + * with bytes already read from the signature, either because they have been + * checked by the calling application, or because of multiple calls to this + * routine. + */ +void /* PRIVATE */ +png_push_read_sig(png_structp png_ptr, png_infop info_ptr) +{ + png_size_t num_checked = png_ptr->sig_bytes, + num_to_check = 8 - num_checked; + + if (png_ptr->buffer_size < num_to_check) + { + num_to_check = png_ptr->buffer_size; + } + + png_push_fill_buffer(png_ptr, &(info_ptr->signature[num_checked]), + num_to_check); + png_ptr->sig_bytes = (png_byte)(png_ptr->sig_bytes + num_to_check); + + if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) + { + if (num_checked < 4 && + png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) + png_error(png_ptr, "Not a PNG file"); + + else + png_error(png_ptr, "PNG file corrupted by ASCII conversion"); + } + else + { + if (png_ptr->sig_bytes >= 8) + { + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + } + } +} + +void /* PRIVATE */ +png_push_read_chunk(png_structp png_ptr, png_infop info_ptr) +{ + png_uint_32 chunk_name; + + /* First we make sure we have enough data for the 4 byte chunk name + * and the 4 byte chunk length before proceeding with decoding the + * chunk data. To fully decode each of these chunks, we also make + * sure we have enough data in the buffer for the 4 byte CRC at the + * end of every chunk (except IDAT, which is handled separately). + */ + if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + { + png_byte chunk_length[4]; + png_byte chunk_tag[4]; + + if (png_ptr->buffer_size < 8) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_fill_buffer(png_ptr, chunk_length, 4); + png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); + png_reset_crc(png_ptr); + png_crc_read(png_ptr, chunk_tag, 4); + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); + png_check_chunk_name(png_ptr, png_ptr->chunk_name); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + } + + chunk_name = png_ptr->chunk_name; + + if (chunk_name == png_IDAT) + { + /* This is here above the if/else case statement below because if the + * unknown handling marks 'IDAT' as unknown then the IDAT handling case is + * completely skipped. + * + * TODO: there must be a better way of doing this. + */ + if (png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + } + + if (chunk_name == png_IHDR) + { + if (png_ptr->push_length != 13) + png_error(png_ptr, "Invalid IHDR length"); + + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_IHDR(png_ptr, info_ptr, png_ptr->push_length); + } + + else if (chunk_name == png_IEND) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_IEND(png_ptr, info_ptr, png_ptr->push_length); + + png_ptr->process_mode = PNG_READ_DONE_MODE; + png_push_have_end(png_ptr, info_ptr); + } + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + else if (png_chunk_unknown_handling(png_ptr, chunk_name)) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + if (chunk_name == png_IDAT) + png_ptr->mode |= PNG_HAVE_IDAT; + + png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); + + if (chunk_name == png_PLTE) + png_ptr->mode |= PNG_HAVE_PLTE; + + else if (chunk_name == png_IDAT) + { + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + } + } + +#endif + else if (chunk_name == png_PLTE) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + png_handle_PLTE(png_ptr, info_ptr, png_ptr->push_length); + } + + else if (chunk_name == png_IDAT) + { + /* If we reach an IDAT chunk, this means we have read all of the + * header chunks, and we can start reading the image (or if this + * is called after the image has been read - we have an error). + */ + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + + if (png_ptr->mode & PNG_HAVE_IDAT) + { + if (!(png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) + if (png_ptr->push_length == 0) + return; + + if (png_ptr->mode & PNG_AFTER_IDAT) + png_benign_error(png_ptr, "Too many IDATs found"); + } + + png_ptr->idat_size = png_ptr->push_length; + png_ptr->mode |= PNG_HAVE_IDAT; + png_ptr->process_mode = PNG_READ_IDAT_MODE; + png_push_have_info(png_ptr, info_ptr); + png_ptr->zstream.avail_out = + (uInt) PNG_ROWBYTES(png_ptr->pixel_depth, + png_ptr->iwidth) + 1; + png_ptr->zstream.next_out = png_ptr->row_buf; + return; + } + +#ifdef PNG_READ_gAMA_SUPPORTED + else if (png_ptr->chunk_name == png_gAMA) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_gAMA(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_sBIT_SUPPORTED + else if (png_ptr->chunk_name == png_sBIT) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_sBIT(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_cHRM_SUPPORTED + else if (png_ptr->chunk_name == png_cHRM) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_cHRM(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_sRGB_SUPPORTED + else if (chunk_name == png_sRGB) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_sRGB(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_iCCP_SUPPORTED + else if (png_ptr->chunk_name == png_iCCP) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_iCCP(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_sPLT_SUPPORTED + else if (chunk_name == png_sPLT) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_sPLT(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_tRNS_SUPPORTED + else if (chunk_name == png_tRNS) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_tRNS(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_bKGD_SUPPORTED + else if (chunk_name == png_bKGD) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_bKGD(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_hIST_SUPPORTED + else if (chunk_name == png_hIST) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_hIST(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_pHYs_SUPPORTED + else if (chunk_name == png_pHYs) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_pHYs(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_oFFs_SUPPORTED + else if (chunk_name == png_oFFs) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_oFFs(png_ptr, info_ptr, png_ptr->push_length); + } +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED + else if (chunk_name == png_pCAL) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_pCAL(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_sCAL_SUPPORTED + else if (chunk_name == png_sCAL) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_sCAL(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_tIME_SUPPORTED + else if (chunk_name == png_tIME) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_handle_tIME(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_tEXt_SUPPORTED + else if (chunk_name == png_tEXt) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_zTXt_SUPPORTED + else if (chunk_name == png_zTXt) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif +#ifdef PNG_READ_iTXt_SUPPORTED + else if (chunk_name == png_iTXt) + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); + } + +#endif + else + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) + { + png_push_save_buffer(png_ptr); + return; + } + png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length); + } + + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; +} + +void /* PRIVATE */ +png_push_crc_skip(png_structp png_ptr, png_uint_32 skip) +{ + png_ptr->process_mode = PNG_SKIP_MODE; + png_ptr->skip_length = skip; +} + +void /* PRIVATE */ +png_push_crc_finish(png_structp png_ptr) +{ + if (png_ptr->skip_length && png_ptr->save_buffer_size) + { + png_size_t save_size = png_ptr->save_buffer_size; + png_uint_32 skip_length = png_ptr->skip_length; + + /* We want the smaller of 'skip_length' and 'save_buffer_size', but + * they are of different types and we don't know which variable has the + * fewest bits. Carefully select the smaller and cast it to the type of + * the larger - this cannot overflow. Do not cast in the following test + * - it will break on either 16 or 64 bit platforms. + */ + if (skip_length < save_size) + save_size = (png_size_t)skip_length; + + else + skip_length = (png_uint_32)save_size; + + png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); + + png_ptr->skip_length -= skip_length; + png_ptr->buffer_size -= save_size; + png_ptr->save_buffer_size -= save_size; + png_ptr->save_buffer_ptr += save_size; + } + if (png_ptr->skip_length && png_ptr->current_buffer_size) + { + png_size_t save_size = png_ptr->current_buffer_size; + png_uint_32 skip_length = png_ptr->skip_length; + + /* We want the smaller of 'skip_length' and 'current_buffer_size', here, + * the same problem exists as above and the same solution. + */ + if (skip_length < save_size) + save_size = (png_size_t)skip_length; + + else + skip_length = (png_uint_32)save_size; + + png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); + + png_ptr->skip_length -= skip_length; + png_ptr->buffer_size -= save_size; + png_ptr->current_buffer_size -= save_size; + png_ptr->current_buffer_ptr += save_size; + } + if (!png_ptr->skip_length) + { + if (png_ptr->buffer_size < 4) + { + png_push_save_buffer(png_ptr); + return; + } + + png_crc_finish(png_ptr, 0); + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + } +} + +void PNGCBAPI +png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length) +{ + png_bytep ptr; + + if (png_ptr == NULL) + return; + + ptr = buffer; + if (png_ptr->save_buffer_size) + { + png_size_t save_size; + + if (length < png_ptr->save_buffer_size) + save_size = length; + + else + save_size = png_ptr->save_buffer_size; + + png_memcpy(ptr, png_ptr->save_buffer_ptr, save_size); + length -= save_size; + ptr += save_size; + png_ptr->buffer_size -= save_size; + png_ptr->save_buffer_size -= save_size; + png_ptr->save_buffer_ptr += save_size; + } + if (length && png_ptr->current_buffer_size) + { + png_size_t save_size; + + if (length < png_ptr->current_buffer_size) + save_size = length; + + else + save_size = png_ptr->current_buffer_size; + + png_memcpy(ptr, png_ptr->current_buffer_ptr, save_size); + png_ptr->buffer_size -= save_size; + png_ptr->current_buffer_size -= save_size; + png_ptr->current_buffer_ptr += save_size; + } +} + +void /* PRIVATE */ +png_push_save_buffer(png_structp png_ptr) +{ + if (png_ptr->save_buffer_size) + { + if (png_ptr->save_buffer_ptr != png_ptr->save_buffer) + { + png_size_t i, istop; + png_bytep sp; + png_bytep dp; + + istop = png_ptr->save_buffer_size; + for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer; + i < istop; i++, sp++, dp++) + { + *dp = *sp; + } + } + } + if (png_ptr->save_buffer_size + png_ptr->current_buffer_size > + png_ptr->save_buffer_max) + { + png_size_t new_max; + png_bytep old_buffer; + + if (png_ptr->save_buffer_size > PNG_SIZE_MAX - + (png_ptr->current_buffer_size + 256)) + { + png_error(png_ptr, "Potential overflow of save_buffer"); + } + + new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256; + old_buffer = png_ptr->save_buffer; + png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, + (png_size_t)new_max); + + if (png_ptr->save_buffer == NULL) + { + png_free(png_ptr, old_buffer); + png_error(png_ptr, "Insufficient memory for save_buffer"); + } + + png_memcpy(png_ptr->save_buffer, old_buffer, png_ptr->save_buffer_size); + png_free(png_ptr, old_buffer); + png_ptr->save_buffer_max = new_max; + } + if (png_ptr->current_buffer_size) + { + png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size, + png_ptr->current_buffer_ptr, png_ptr->current_buffer_size); + png_ptr->save_buffer_size += png_ptr->current_buffer_size; + png_ptr->current_buffer_size = 0; + } + png_ptr->save_buffer_ptr = png_ptr->save_buffer; + png_ptr->buffer_size = 0; +} + +void /* PRIVATE */ +png_push_restore_buffer(png_structp png_ptr, png_bytep buffer, + png_size_t buffer_length) +{ + png_ptr->current_buffer = buffer; + png_ptr->current_buffer_size = buffer_length; + png_ptr->buffer_size = buffer_length + png_ptr->save_buffer_size; + png_ptr->current_buffer_ptr = png_ptr->current_buffer; +} + +void /* PRIVATE */ +png_push_read_IDAT(png_structp png_ptr) +{ + if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + { + png_byte chunk_length[4]; + png_byte chunk_tag[4]; + + /* TODO: this code can be commoned up with the same code in push_read */ + if (png_ptr->buffer_size < 8) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_fill_buffer(png_ptr, chunk_length, 4); + png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); + png_reset_crc(png_ptr); + png_crc_read(png_ptr, chunk_tag, 4); + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + + if (png_ptr->chunk_name != png_IDAT) + { + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + + if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + png_error(png_ptr, "Not enough compressed data"); + + return; + } + + png_ptr->idat_size = png_ptr->push_length; + } + + if (png_ptr->idat_size && png_ptr->save_buffer_size) + { + png_size_t save_size = png_ptr->save_buffer_size; + png_uint_32 idat_size = png_ptr->idat_size; + + /* We want the smaller of 'idat_size' and 'current_buffer_size', but they + * are of different types and we don't know which variable has the fewest + * bits. Carefully select the smaller and cast it to the type of the + * larger - this cannot overflow. Do not cast in the following test - it + * will break on either 16 or 64 bit platforms. + */ + if (idat_size < save_size) + save_size = (png_size_t)idat_size; + + else + idat_size = (png_uint_32)save_size; + + png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size); + + png_process_IDAT_data(png_ptr, png_ptr->save_buffer_ptr, save_size); + + png_ptr->idat_size -= idat_size; + png_ptr->buffer_size -= save_size; + png_ptr->save_buffer_size -= save_size; + png_ptr->save_buffer_ptr += save_size; + } + + if (png_ptr->idat_size && png_ptr->current_buffer_size) + { + png_size_t save_size = png_ptr->current_buffer_size; + png_uint_32 idat_size = png_ptr->idat_size; + + /* We want the smaller of 'idat_size' and 'current_buffer_size', but they + * are of different types and we don't know which variable has the fewest + * bits. Carefully select the smaller and cast it to the type of the + * larger - this cannot overflow. + */ + if (idat_size < save_size) + save_size = (png_size_t)idat_size; + + else + idat_size = (png_uint_32)save_size; + + png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size); + + png_process_IDAT_data(png_ptr, png_ptr->current_buffer_ptr, save_size); + + png_ptr->idat_size -= idat_size; + png_ptr->buffer_size -= save_size; + png_ptr->current_buffer_size -= save_size; + png_ptr->current_buffer_ptr += save_size; + } + if (!png_ptr->idat_size) + { + if (png_ptr->buffer_size < 4) + { + png_push_save_buffer(png_ptr); + return; + } + + png_crc_finish(png_ptr, 0); + png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; + png_ptr->mode |= PNG_AFTER_IDAT; + } +} + +void /* PRIVATE */ +png_process_IDAT_data(png_structp png_ptr, png_bytep buffer, + png_size_t buffer_length) +{ + /* The caller checks for a non-zero buffer length. */ + if (!(buffer_length > 0) || buffer == NULL) + png_error(png_ptr, "No IDAT data (internal error)"); + + /* This routine must process all the data it has been given + * before returning, calling the row callback as required to + * handle the uncompressed results. + */ + png_ptr->zstream.next_in = buffer; + png_ptr->zstream.avail_in = (uInt)buffer_length; + + /* Keep going until the decompressed data is all processed + * or the stream marked as finished. + */ + while (png_ptr->zstream.avail_in > 0 && + !(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + { + int ret; + + /* We have data for zlib, but we must check that zlib + * has someplace to put the results. It doesn't matter + * if we don't expect any results -- it may be the input + * data is just the LZ end code. + */ + if (!(png_ptr->zstream.avail_out > 0)) + { + png_ptr->zstream.avail_out = + (uInt) PNG_ROWBYTES(png_ptr->pixel_depth, + png_ptr->iwidth) + 1; + + png_ptr->zstream.next_out = png_ptr->row_buf; + } + + /* Using Z_SYNC_FLUSH here means that an unterminated + * LZ stream (a stream with a missing end code) can still + * be handled, otherwise (Z_NO_FLUSH) a future zlib + * implementation might defer output and therefore + * change the current behavior (see comments in inflate.c + * for why this doesn't happen at present with zlib 1.2.5). + */ + ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH); + + /* Check for any failure before proceeding. */ + if (ret != Z_OK && ret != Z_STREAM_END) + { + /* Terminate the decompression. */ + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + + /* This may be a truncated stream (missing or + * damaged end code). Treat that as a warning. + */ + if (png_ptr->row_number >= png_ptr->num_rows || + png_ptr->pass > 6) + png_warning(png_ptr, "Truncated compressed data in IDAT"); + + else + png_error(png_ptr, "Decompression error in IDAT"); + + /* Skip the check on unprocessed input */ + return; + } + + /* Did inflate output any data? */ + if (png_ptr->zstream.next_out != png_ptr->row_buf) + { + /* Is this unexpected data after the last row? + * If it is, artificially terminate the LZ output + * here. + */ + if (png_ptr->row_number >= png_ptr->num_rows || + png_ptr->pass > 6) + { + /* Extra data. */ + png_warning(png_ptr, "Extra compressed data in IDAT"); + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + + /* Do no more processing; skip the unprocessed + * input check below. + */ + return; + } + + /* Do we have a complete row? */ + if (png_ptr->zstream.avail_out == 0) + png_push_process_row(png_ptr); + } + + /* And check for the end of the stream. */ + if (ret == Z_STREAM_END) + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + } + + /* All the data should have been processed, if anything + * is left at this point we have bytes of IDAT data + * after the zlib end code. + */ + if (png_ptr->zstream.avail_in > 0) + png_warning(png_ptr, "Extra compression data in IDAT"); +} + +void /* PRIVATE */ +png_push_process_row(png_structp png_ptr) +{ + /* 1.5.6: row_info moved out of png_struct to a local here. */ + png_row_info row_info; + + row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */ + row_info.color_type = png_ptr->color_type; + row_info.bit_depth = png_ptr->bit_depth; + row_info.channels = png_ptr->channels; + row_info.pixel_depth = png_ptr->pixel_depth; + row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); + + if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) + { + if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) + png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1, + png_ptr->prev_row + 1, png_ptr->row_buf[0]); + else + png_error(png_ptr, "bad adaptive filter value"); + } + + /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before + * 1.5.6, while the buffer really is this big in current versions of libpng + * it may not be in the future, so this was changed just to copy the + * interlaced row count: + */ + png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + if (png_ptr->transformations) + png_do_read_transformations(png_ptr, &row_info); +#endif + + /* The transformed pixel depth should match the depth now in row_info. */ + if (png_ptr->transformed_pixel_depth == 0) + { + png_ptr->transformed_pixel_depth = row_info.pixel_depth; + if (row_info.pixel_depth > png_ptr->maximum_pixel_depth) + png_error(png_ptr, "progressive row overflow"); + } + + else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth) + png_error(png_ptr, "internal progressive row size calculation error"); + + +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* Blow up interlaced rows to full size */ + if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) + { + if (png_ptr->pass < 6) + png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, + png_ptr->transformations); + + switch (png_ptr->pass) + { + case 0: + { + int i; + for (i = 0; i < 8 && png_ptr->pass == 0; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); /* Updates png_ptr->pass */ + } + + if (png_ptr->pass == 2) /* Pass 1 might be empty */ + { + for (i = 0; i < 4 && png_ptr->pass == 2; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + + if (png_ptr->pass == 4 && png_ptr->height <= 4) + { + for (i = 0; i < 2 && png_ptr->pass == 4; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + + if (png_ptr->pass == 6 && png_ptr->height <= 4) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + + break; + } + + case 1: + { + int i; + for (i = 0; i < 8 && png_ptr->pass == 1; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } + + if (png_ptr->pass == 2) /* Skip top 4 generated rows */ + { + for (i = 0; i < 4 && png_ptr->pass == 2; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + + break; + } + + case 2: + { + int i; + + for (i = 0; i < 4 && png_ptr->pass == 2; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } + + for (i = 0; i < 4 && png_ptr->pass == 2; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + + if (png_ptr->pass == 4) /* Pass 3 might be empty */ + { + for (i = 0; i < 2 && png_ptr->pass == 4; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + + break; + } + + case 3: + { + int i; + + for (i = 0; i < 4 && png_ptr->pass == 3; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } + + if (png_ptr->pass == 4) /* Skip top two generated rows */ + { + for (i = 0; i < 2 && png_ptr->pass == 4; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + + break; + } + + case 4: + { + int i; + + for (i = 0; i < 2 && png_ptr->pass == 4; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } + + for (i = 0; i < 2 && png_ptr->pass == 4; i++) + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + + if (png_ptr->pass == 6) /* Pass 5 might be empty */ + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + + break; + } + + case 5: + { + int i; + + for (i = 0; i < 2 && png_ptr->pass == 5; i++) + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } + + if (png_ptr->pass == 6) /* Skip top generated row */ + { + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + + break; + } + + default: + case 6: + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + + if (png_ptr->pass != 6) + break; + + png_push_have_row(png_ptr, NULL); + png_read_push_finish_row(png_ptr); + } + } + } + else +#endif + { + png_push_have_row(png_ptr, png_ptr->row_buf + 1); + png_read_push_finish_row(png_ptr); + } +} + +void /* PRIVATE */ +png_read_push_finish_row(png_structp png_ptr) +{ + /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ + + /* Start of interlace block */ + static PNG_CONST png_byte FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; + + /* Offset to next interlace block */ + static PNG_CONST png_byte FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; + + /* Start of interlace block in the y direction */ + static PNG_CONST png_byte FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; + + /* Offset to next interlace block in the y direction */ + static PNG_CONST png_byte FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; + + /* Height of interlace block. This is not currently used - if you need + * it, uncomment it here and in png.h + static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; + */ + + png_ptr->row_number++; + if (png_ptr->row_number < png_ptr->num_rows) + return; + +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (png_ptr->interlaced) + { + png_ptr->row_number = 0; + png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + + do + { + png_ptr->pass++; + if ((png_ptr->pass == 1 && png_ptr->width < 5) || + (png_ptr->pass == 3 && png_ptr->width < 3) || + (png_ptr->pass == 5 && png_ptr->width < 2)) + png_ptr->pass++; + + if (png_ptr->pass > 7) + png_ptr->pass--; + + if (png_ptr->pass >= 7) + break; + + png_ptr->iwidth = (png_ptr->width + + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; + + if (png_ptr->transformations & PNG_INTERLACE) + break; + + png_ptr->num_rows = (png_ptr->height + + png_pass_yinc[png_ptr->pass] - 1 - + png_pass_ystart[png_ptr->pass]) / + png_pass_yinc[png_ptr->pass]; + + } while (png_ptr->iwidth == 0 || png_ptr->num_rows == 0); + } +#endif /* PNG_READ_INTERLACING_SUPPORTED */ +} + +#ifdef PNG_READ_tEXt_SUPPORTED +void /* PRIVATE */ +png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 + length) +{ + if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) + { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + png_error(png_ptr, "Out of place tEXt"); + /* NOT REACHED */ + } + +#ifdef PNG_MAX_MALLOC_64K + png_ptr->skip_length = 0; /* This may not be necessary */ + + if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */ + { + png_warning(png_ptr, "tEXt chunk too large to fit in memory"); + png_ptr->skip_length = length - (png_uint_32)65535L; + length = (png_uint_32)65535L; + } +#endif + + png_ptr->current_text = (png_charp)png_malloc(png_ptr, + (png_size_t)(length + 1)); + png_ptr->current_text[length] = '\0'; + png_ptr->current_text_ptr = png_ptr->current_text; + png_ptr->current_text_size = (png_size_t)length; + png_ptr->current_text_left = (png_size_t)length; + png_ptr->process_mode = PNG_READ_tEXt_MODE; +} + +void /* PRIVATE */ +png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr->buffer_size && png_ptr->current_text_left) + { + png_size_t text_size; + + if (png_ptr->buffer_size < png_ptr->current_text_left) + text_size = png_ptr->buffer_size; + + else + text_size = png_ptr->current_text_left; + + png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); + png_ptr->current_text_left -= text_size; + png_ptr->current_text_ptr += text_size; + } + if (!(png_ptr->current_text_left)) + { + png_textp text_ptr; + png_charp text; + png_charp key; + int ret; + + if (png_ptr->buffer_size < 4) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_crc_finish(png_ptr); + +#ifdef PNG_MAX_MALLOC_64K + if (png_ptr->skip_length) + return; +#endif + + key = png_ptr->current_text; + + for (text = key; *text; text++) + /* Empty loop */ ; + + if (text < key + png_ptr->current_text_size) + text++; + + text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text)); + text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; + text_ptr->key = key; + text_ptr->itxt_length = 0; + text_ptr->lang = NULL; + text_ptr->lang_key = NULL; + text_ptr->text = text; + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_free(png_ptr, key); + png_free(png_ptr, text_ptr); + png_ptr->current_text = NULL; + + if (ret) + png_warning(png_ptr, "Insufficient memory to store text chunk"); + } +} +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED +void /* PRIVATE */ +png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 + length) +{ + if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) + { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + png_error(png_ptr, "Out of place zTXt"); + /* NOT REACHED */ + } + +#ifdef PNG_MAX_MALLOC_64K + /* We can't handle zTXt chunks > 64K, since we don't have enough space + * to be able to store the uncompressed data. Actually, the threshold + * is probably around 32K, but it isn't as definite as 64K is. + */ + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "zTXt chunk too large to fit in memory"); + png_push_crc_skip(png_ptr, length); + return; + } +#endif + + png_ptr->current_text = (png_charp)png_malloc(png_ptr, + (png_size_t)(length + 1)); + png_ptr->current_text[length] = '\0'; + png_ptr->current_text_ptr = png_ptr->current_text; + png_ptr->current_text_size = (png_size_t)length; + png_ptr->current_text_left = (png_size_t)length; + png_ptr->process_mode = PNG_READ_zTXt_MODE; +} + +void /* PRIVATE */ +png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr->buffer_size && png_ptr->current_text_left) + { + png_size_t text_size; + + if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left) + text_size = png_ptr->buffer_size; + + else + text_size = png_ptr->current_text_left; + + png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); + png_ptr->current_text_left -= text_size; + png_ptr->current_text_ptr += text_size; + } + if (!(png_ptr->current_text_left)) + { + png_textp text_ptr; + png_charp text; + png_charp key; + int ret; + png_size_t text_size, key_size; + + if (png_ptr->buffer_size < 4) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_crc_finish(png_ptr); + + key = png_ptr->current_text; + + for (text = key; *text; text++) + /* Empty loop */ ; + + /* zTXt can't have zero text */ + if (text >= key + png_ptr->current_text_size) + { + png_ptr->current_text = NULL; + png_free(png_ptr, key); + return; + } + + text++; + + if (*text != PNG_TEXT_COMPRESSION_zTXt) /* Check compression byte */ + { + png_ptr->current_text = NULL; + png_free(png_ptr, key); + return; + } + + text++; + + png_ptr->zstream.next_in = (png_bytep)text; + png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size - + (text - key)); + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + + key_size = text - key; + text_size = 0; + text = NULL; + ret = Z_STREAM_END; + + while (png_ptr->zstream.avail_in) + { + ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); + if (ret != Z_OK && ret != Z_STREAM_END) + { + inflateReset(&png_ptr->zstream); + png_ptr->zstream.avail_in = 0; + png_ptr->current_text = NULL; + png_free(png_ptr, key); + png_free(png_ptr, text); + return; + } + + if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END) + { + if (text == NULL) + { + text = (png_charp)png_malloc(png_ptr, + (png_ptr->zbuf_size + - png_ptr->zstream.avail_out + key_size + 1)); + + png_memcpy(text + key_size, png_ptr->zbuf, + png_ptr->zbuf_size - png_ptr->zstream.avail_out); + + png_memcpy(text, key, key_size); + + text_size = key_size + png_ptr->zbuf_size - + png_ptr->zstream.avail_out; + + *(text + text_size) = '\0'; + } + + else + { + png_charp tmp; + + tmp = text; + text = (png_charp)png_malloc(png_ptr, text_size + + (png_ptr->zbuf_size + - png_ptr->zstream.avail_out + 1)); + + png_memcpy(text, tmp, text_size); + png_free(png_ptr, tmp); + + png_memcpy(text + text_size, png_ptr->zbuf, + png_ptr->zbuf_size - png_ptr->zstream.avail_out); + + text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; + *(text + text_size) = '\0'; + } + + if (ret != Z_STREAM_END) + { + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + } + } + else + { + break; + } + + if (ret == Z_STREAM_END) + break; + } + + inflateReset(&png_ptr->zstream); + png_ptr->zstream.avail_in = 0; + + if (ret != Z_STREAM_END) + { + png_ptr->current_text = NULL; + png_free(png_ptr, key); + png_free(png_ptr, text); + return; + } + + png_ptr->current_text = NULL; + png_free(png_ptr, key); + key = text; + text += key_size; + + text_ptr = (png_textp)png_malloc(png_ptr, + png_sizeof(png_text)); + text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt; + text_ptr->key = key; + text_ptr->itxt_length = 0; + text_ptr->lang = NULL; + text_ptr->lang_key = NULL; + text_ptr->text = text; + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_free(png_ptr, key); + png_free(png_ptr, text_ptr); + + if (ret) + png_warning(png_ptr, "Insufficient memory to store text chunk"); + } +} +#endif + +#ifdef PNG_READ_iTXt_SUPPORTED +void /* PRIVATE */ +png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 + length) +{ + if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND)) + { + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + png_error(png_ptr, "Out of place iTXt"); + /* NOT REACHED */ + } + +#ifdef PNG_MAX_MALLOC_64K + png_ptr->skip_length = 0; /* This may not be necessary */ + + if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */ + { + png_warning(png_ptr, "iTXt chunk too large to fit in memory"); + png_ptr->skip_length = length - (png_uint_32)65535L; + length = (png_uint_32)65535L; + } +#endif + + png_ptr->current_text = (png_charp)png_malloc(png_ptr, + (png_size_t)(length + 1)); + png_ptr->current_text[length] = '\0'; + png_ptr->current_text_ptr = png_ptr->current_text; + png_ptr->current_text_size = (png_size_t)length; + png_ptr->current_text_left = (png_size_t)length; + png_ptr->process_mode = PNG_READ_iTXt_MODE; +} + +void /* PRIVATE */ +png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr) +{ + + if (png_ptr->buffer_size && png_ptr->current_text_left) + { + png_size_t text_size; + + if (png_ptr->buffer_size < png_ptr->current_text_left) + text_size = png_ptr->buffer_size; + + else + text_size = png_ptr->current_text_left; + + png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size); + png_ptr->current_text_left -= text_size; + png_ptr->current_text_ptr += text_size; + } + + if (!(png_ptr->current_text_left)) + { + png_textp text_ptr; + png_charp key; + int comp_flag; + png_charp lang; + png_charp lang_key; + png_charp text; + int ret; + + if (png_ptr->buffer_size < 4) + { + png_push_save_buffer(png_ptr); + return; + } + + png_push_crc_finish(png_ptr); + +#ifdef PNG_MAX_MALLOC_64K + if (png_ptr->skip_length) + return; +#endif + + key = png_ptr->current_text; + + for (lang = key; *lang; lang++) + /* Empty loop */ ; + + if (lang < key + png_ptr->current_text_size - 3) + lang++; + + comp_flag = *lang++; + lang++; /* Skip comp_type, always zero */ + + for (lang_key = lang; *lang_key; lang_key++) + /* Empty loop */ ; + + lang_key++; /* Skip NUL separator */ + + text=lang_key; + + if (lang_key < key + png_ptr->current_text_size - 1) + { + for (; *text; text++) + /* Empty loop */ ; + } + + if (text < key + png_ptr->current_text_size) + text++; + + text_ptr = (png_textp)png_malloc(png_ptr, + png_sizeof(png_text)); + + text_ptr->compression = comp_flag + 2; + text_ptr->key = key; + text_ptr->lang = lang; + text_ptr->lang_key = lang_key; + text_ptr->text = text; + text_ptr->text_length = 0; + text_ptr->itxt_length = png_strlen(text); + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_ptr->current_text = NULL; + + png_free(png_ptr, text_ptr); + if (ret) + png_warning(png_ptr, "Insufficient memory to store iTXt chunk"); + } +} +#endif + +/* This function is called when we haven't found a handler for this + * chunk. If there isn't a problem with the chunk itself (ie a bad chunk + * name or a critical chunk), the chunk is (currently) silently ignored. + */ +void /* PRIVATE */ +png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 + length) +{ + png_uint_32 skip = 0; + png_uint_32 chunk_name = png_ptr->chunk_name; + + if (PNG_CHUNK_CRITICAL(chunk_name)) + { +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED + && png_ptr->read_user_chunk_fn == NULL +#endif + ) +#endif + png_chunk_error(png_ptr, "unknown critical chunk"); + + PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */ + } + +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + /* TODO: the code below is apparently just using the + * png_struct::unknown_chunk member as a temporarily variable, it should be + * possible to eliminate both it and the temporary buffer. + */ + if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) + { +#ifdef PNG_MAX_MALLOC_64K + if (length > 65535) + { + png_warning(png_ptr, "unknown chunk too large to fit in memory"); + skip = length - 65535; + length = 65535; + } +#endif + /* This is just a record for the user; libpng doesn't use the character + * form of the name. + */ + PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); + + /* The following cast should be safe because of the check above. */ + png_ptr->unknown_chunk.size = (png_size_t)length; + + if (length == 0) + png_ptr->unknown_chunk.data = NULL; + + else + { + png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, + png_ptr->unknown_chunk.size); + png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data, + png_ptr->unknown_chunk.size); + } + +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED + if (png_ptr->read_user_chunk_fn != NULL) + { + /* Callback to user unknown chunk handler */ + int ret; + ret = (*(png_ptr->read_user_chunk_fn)) + (png_ptr, &png_ptr->unknown_chunk); + + if (ret < 0) + png_chunk_error(png_ptr, "error in user chunk"); + + if (ret == 0) + { + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS) + png_chunk_error(png_ptr, "unknown critical chunk"); + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); + } + } + + else +#endif + png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; + } + + else +#endif + skip=length; + png_push_crc_skip(png_ptr, skip); +} + +void /* PRIVATE */ +png_push_have_info(png_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr->info_fn != NULL) + (*(png_ptr->info_fn))(png_ptr, info_ptr); +} + +void /* PRIVATE */ +png_push_have_end(png_structp png_ptr, png_infop info_ptr) +{ + if (png_ptr->end_fn != NULL) + (*(png_ptr->end_fn))(png_ptr, info_ptr); +} + +void /* PRIVATE */ +png_push_have_row(png_structp png_ptr, png_bytep row) +{ + if (png_ptr->row_fn != NULL) + (*(png_ptr->row_fn))(png_ptr, row, png_ptr->row_number, + (int)png_ptr->pass); +} + +#ifdef PNG_READ_INTERLACING_SUPPORTED +void PNGAPI +png_progressive_combine_row (png_structp png_ptr, png_bytep old_row, + png_const_bytep new_row) +{ + if (png_ptr == NULL) + return; + + /* new_row is a flag here - if it is NULL then the app callback was called + * from an empty row (see the calls to png_struct::row_fn below), otherwise + * it must be png_ptr->row_buf+1 + */ + if (new_row != NULL) + png_combine_row(png_ptr, old_row, 1/*display*/); +} +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + +void PNGAPI +png_set_progressive_read_fn(png_structp png_ptr, png_voidp progressive_ptr, + png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, + png_progressive_end_ptr end_fn) +{ + if (png_ptr == NULL) + return; + + png_ptr->info_fn = info_fn; + png_ptr->row_fn = row_fn; + png_ptr->end_fn = end_fn; + + png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); +} + +png_voidp PNGAPI +png_get_progressive_ptr(png_const_structp png_ptr) +{ + if (png_ptr == NULL) + return (NULL); + + return png_ptr->io_ptr; +} +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngpriv.h b/ExternalLibs/glpng/png/pngpriv.h new file mode 100644 index 0000000..5f751de --- /dev/null +++ b/ExternalLibs/glpng/png/pngpriv.h @@ -0,0 +1,1629 @@ + +/* pngpriv.h - private declarations for use inside libpng + * + * For conditions of distribution and use, see copyright notice in png.h + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* The symbols declared in this file (including the functions declared + * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public + * interface, and are not recommended for use by regular applications. + * Some of them may become public in the future; others may stay private, + * change in an incompatible way, or even disappear. + * Although the libpng users are not forbidden to include this header, + * they should be well aware of the issues that may arise from doing so. + */ + +#ifndef PNGPRIV_H +#define PNGPRIV_H + +/* Feature Test Macros. The following are defined here to ensure that correctly + * implemented libraries reveal the APIs libpng needs to build and hide those + * that are not needed and potentially damaging to the compilation. + * + * Feature Test Macros must be defined before any system header is included (see + * POSIX 1003.1 2.8.2 "POSIX Symbols." + * + * These macros only have an effect if the operating system supports either + * POSIX 1003.1 or C99, or both. On other operating systems (particularly + * Windows/Visual Studio) there is no effect; the OS specific tests below are + * still required (as of 2011-05-02.) + */ +#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ + +/* This is required for the definition of abort(), used as a last ditch + * error handler when all else fails. + */ +#include + +/* This is used to find 'offsetof', used below for alignment tests. */ +#include + +#define PNGLIB_BUILD /*libpng is being built, not used*/ + +#ifdef PNG_USER_CONFIG +# include "pngusr.h" + /* These should have been defined in pngusr.h */ +# ifndef PNG_USER_PRIVATEBUILD +# define PNG_USER_PRIVATEBUILD "Custom libpng build" +# endif +# ifndef PNG_USER_DLLFNAME_POSTFIX +# define PNG_USER_DLLFNAME_POSTFIX "Cb" +# endif +#endif + +/* Is this a build of a DLL where compilation of the object modules requires + * different preprocessor settings to those required for a simple library? If + * so PNG_BUILD_DLL must be set. + * + * If libpng is used inside a DLL but that DLL does not export the libpng APIs + * PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a + * static library of libpng then link the DLL against that. + */ +#ifndef PNG_BUILD_DLL +# ifdef DLL_EXPORT + /* This is set by libtool when files are compiled for a DLL; libtool + * always compiles twice, even on systems where it isn't necessary. Set + * PNG_BUILD_DLL in case it is necessary: + */ +# define PNG_BUILD_DLL +# else +# ifdef _WINDLL + /* This is set by the Microsoft Visual Studio IDE in projects that + * build a DLL. It can't easily be removed from those projects (it + * isn't visible in the Visual Studio UI) so it is a fairly reliable + * indication that PNG_IMPEXP needs to be set to the DLL export + * attributes. + */ +# define PNG_BUILD_DLL +# else +# ifdef __DLL__ + /* This is set by the Borland C system when compiling for a DLL + * (as above.) + */ +# define PNG_BUILD_DLL +# else + /* Add additional compiler cases here. */ +# endif +# endif +# endif +#endif /* Setting PNG_BUILD_DLL if required */ + +/* See pngconf.h for more details: the builder of the library may set this on + * the command line to the right thing for the specific compilation system or it + * may be automagically set above (at present we know of no system where it does + * need to be set on the command line.) + * + * PNG_IMPEXP must be set here when building the library to prevent pngconf.h + * setting it to the "import" setting for a DLL build. + */ +#ifndef PNG_IMPEXP +# ifdef PNG_BUILD_DLL +# define PNG_IMPEXP PNG_DLL_EXPORT +# else + /* Not building a DLL, or the DLL doesn't require specific export + * definitions. + */ +# define PNG_IMPEXP +# endif +#endif + +/* No warnings for private or deprecated functions in the build: */ +#ifndef PNG_DEPRECATED +# define PNG_DEPRECATED +#endif +#ifndef PNG_PRIVATE +# define PNG_PRIVATE +#endif + +#include "png.h" +#include "pnginfo.h" +#include "pngstruct.h" + +/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ +#ifndef PNG_DLL_EXPORT +# define PNG_DLL_EXPORT +#endif + +/* This is used for 16 bit gamma tables - only the top level pointers are const, + * this could be changed: + */ +typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; + +/* Added at libpng-1.2.9 */ +/* Moved to pngpriv.h at libpng-1.5.0 */ + +/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" + * script. We may need it here to get the correct configuration on things + * like limits. + */ +#ifdef PNG_CONFIGURE_LIBPNG +# ifdef HAVE_CONFIG_H +# include "config.h" +# endif +#endif + +/* Moved to pngpriv.h at libpng-1.5.0 */ +/* NOTE: some of these may have been used in external applications as + * these definitions were exposed in pngconf.h prior to 1.5. + */ + +/* If you are running on a machine where you cannot allocate more + * than 64K of memory at once, uncomment this. While libpng will not + * normally need that much memory in a chunk (unless you load up a very + * large file), zlib needs to know how big of a chunk it can use, and + * libpng thus makes sure to check any memory allocation to verify it + * will fit into memory. + * + * zlib provides 'MAXSEG_64K' which, if defined, indicates the + * same limit and pngconf.h (already included) sets the limit + * if certain operating systems are detected. + */ +#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) +# define PNG_MAX_MALLOC_64K +#endif + +#ifndef PNG_UNUSED +/* Unused formal parameter warnings are silenced using the following macro + * which is expected to have no bad effects on performance (optimizing + * compilers will probably remove it entirely). Note that if you replace + * it with something other than whitespace, you must include the terminating + * semicolon. + */ +# define PNG_UNUSED(param) (void)param; +#endif + +/* Just a little check that someone hasn't tried to define something + * contradictory. + */ +#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) +# undef PNG_ZBUF_SIZE +# define PNG_ZBUF_SIZE 65536L +#endif + +/* PNG_STATIC is used to mark internal file scope functions if they need to be + * accessed for implementation tests (see the code in tests/?*). + */ +#ifndef PNG_STATIC +# define PNG_STATIC static +#endif + +/* C99 restrict is used where possible, to do this 'restrict' is defined as + * empty if we can't be sure it is supported. configure builds have already + * done this work. + */ +#ifdef PNG_CONFIGURE_LIBPNG +# define PNG_RESTRICT restrict +#else + /* Modern compilers support restrict, but assume not for anything not + * recognized here: + */ +# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__ +# define PNG_RESTRICT restrict +# else +# define PNG_RESTRICT +# endif +#endif + +/* If warnings or errors are turned off the code is disabled or redirected here. + * From 1.5.4 functions have been added to allow very limited formatting of + * error and warning messages - this code will also be disabled here. + */ +#ifdef PNG_WARNINGS_SUPPORTED +# define PNG_WARNING_PARAMETERS(p) png_warning_parameters p; +#else +# define png_warning(s1,s2) ((void)(s1)) +# define png_chunk_warning(s1,s2) ((void)(s1)) +# define png_warning_parameter(p,number,string) ((void)0) +# define png_warning_parameter_unsigned(p,number,format,value) ((void)0) +# define png_warning_parameter_signed(p,number,format,value) ((void)0) +# define png_formatted_warning(pp,p,message) ((void)(pp)) +# define PNG_WARNING_PARAMETERS(p) +#endif +#ifndef PNG_ERROR_TEXT_SUPPORTED +# define png_error(s1,s2) png_err(s1) +# define png_chunk_error(s1,s2) png_err(s1) +# define png_fixed_error(s1,s2) png_err(s1) +#endif + +/* C allows up-casts from (void*) to any pointer and (const void*) to any + * pointer to a const object. C++ regards this as a type error and requires an + * explicit, static, cast and provides the static_cast<> rune to ensure that + * const is not cast away. + */ +#ifdef __cplusplus +# define png_voidcast(type, value) static_cast(value) +#else +# define png_voidcast(type, value) (value) +#endif /* __cplusplus */ + +#ifndef PNG_EXTERN +/* The functions exported by PNG_EXTERN are internal functions, which + * aren't usually used outside the library (as far as I know), so it is + * debatable if they should be exported at all. In the future, when it + * is possible to have run-time registry of chunk-handling functions, + * some of these might be made available again. + * + * 1.5.7: turned the use of 'extern' back on, since it is localized to pngpriv.h + * it should be safe now (it is unclear why it was turned off.) + */ +# define PNG_EXTERN extern +#endif + +/* Some fixed point APIs are still required even if not exported because + * they get used by the corresponding floating point APIs. This magic + * deals with this: + */ +#ifdef PNG_FIXED_POINT_SUPPORTED +# define PNGFAPI PNGAPI +#else +# define PNGFAPI /* PRIVATE */ +#endif + +/* Other defines specific to compilers can go here. Try to keep + * them inside an appropriate ifdef/endif pair for portability. + */ +#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\ + defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) + /* png.c requires the following ANSI-C constants if the conversion of + * floating point to ASCII is implemented therein: + * + * DBL_DIG Maximum number of decimal digits (can be set to any constant) + * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value) + * DBL_MAX Maximum floating point number (can be set to an arbitrary value) + */ +# include + +# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ + defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) + /* We need to check that hasn't already been included earlier + * as it seems it doesn't agree with , yet we should really use + * if possible. + */ +# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) +# include +# endif +# else +# include +# endif +# if defined(_AMIGA) && defined(__SASC) && defined(_M68881) + /* Amiga SAS/C: We must include builtin FPU functions when compiling using + * MATH=68881 + */ +# include +# endif +#endif + +/* This provides the non-ANSI (far) memory allocation routines. */ +#if defined(__TURBOC__) && defined(__MSDOS__) +# include +# include +#endif + +#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ + defined(_WIN32) || defined(__WIN32__) +# include /* defines _WINDOWS_ macro */ +#endif + +/* Moved here around 1.5.0beta36 from pngconf.h */ +/* Users may want to use these so they are not private. Any library + * functions that are passed far data must be model-independent. + */ + +/* Memory model/platform independent fns */ +#ifndef PNG_ABORT +# ifdef _WINDOWS_ +# define PNG_ABORT() ExitProcess(0) +# else +# define PNG_ABORT() abort() +# endif +#endif + +#ifdef USE_FAR_KEYWORD +/* Use this to make far-to-near assignments */ +# define CHECK 1 +# define NOCHECK 0 +# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) +# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) +# define png_strlen _fstrlen +# define png_memcmp _fmemcmp /* SJT: added */ +# define png_memcpy _fmemcpy +# define png_memset _fmemset +#else +# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ +# define CVT_PTR(ptr) (ptr) +# define CVT_PTR_NOCHECK(ptr) (ptr) +# define png_strlen lstrlenA +# define png_memcmp memcmp +# define png_memcpy CopyMemory +# define png_memset memset +# else +# define CVT_PTR(ptr) (ptr) +# define CVT_PTR_NOCHECK(ptr) (ptr) +# define png_strlen strlen +# define png_memcmp memcmp /* SJT: added */ +# define png_memcpy memcpy +# define png_memset memset +# endif +#endif + +/* These macros may need to be architecture dependent. */ +#define PNG_ALIGN_NONE 0 /* do not use data alignment */ +#define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ +#ifdef offsetof +# define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ +#else +# define PNG_ALIGN_OFFSET -1 /* prevent the use of this */ +#endif +#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ + +#ifndef PNG_ALIGN_TYPE + /* Default to using aligned access optimizations and requiring alignment to a + * multiple of the data type size. Override in a compiler specific fashion + * if necessary by inserting tests here: + */ +# define PNG_ALIGN_TYPE PNG_ALIGN_SIZE +#endif + +#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE + /* This is used because in some compiler implementations non-aligned + * structure members are supported, so the offsetof approach below fails. + * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access + * is good for performance. Do not do this unless you have tested the result + * and understand it. + */ +# define png_alignof(type) (sizeof (type)) +#else +# if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET +# define png_alignof(type) offsetof(struct{char c; type t;}, t) +# else +# if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS +# define png_alignof(type) (1) +# endif + /* Else leave png_alignof undefined to prevent use thereof */ +# endif +#endif + +/* This implicitly assumes alignment is always to a power of 2. */ +#ifdef png_alignof +# define png_isaligned(ptr, type)\ + ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0) +#else +# define png_isaligned(ptr, type) 0 +#endif + +/* End of memory model/platform independent support */ +/* End of 1.5.0beta36 move from pngconf.h */ + +/* CONSTANTS and UTILITY MACROS + * These are used internally by libpng and not exposed in the API + */ + +/* Various modes of operation. Note that after an init, mode is set to + * zero automatically when the structure is created. Three of these + * are defined in png.h because they need to be visible to applications + * that call png_set_unknown_chunk(). + */ +/* #define PNG_HAVE_IHDR 0x01 (defined in png.h) */ +/* #define PNG_HAVE_PLTE 0x02 (defined in png.h) */ +#define PNG_HAVE_IDAT 0x04 +/* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ +#define PNG_HAVE_IEND 0x10 +#define PNG_HAVE_gAMA 0x20 +#define PNG_HAVE_cHRM 0x40 +#define PNG_HAVE_sRGB 0x80 +#define PNG_HAVE_CHUNK_HEADER 0x100 +#define PNG_WROTE_tIME 0x200 +#define PNG_WROTE_INFO_BEFORE_PLTE 0x400 +#define PNG_BACKGROUND_IS_GRAY 0x800 +#define PNG_HAVE_PNG_SIGNATURE 0x1000 +#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ + +/* Flags for the transformations the PNG library does on the image data */ +#define PNG_BGR 0x0001 +#define PNG_INTERLACE 0x0002 +#define PNG_PACK 0x0004 +#define PNG_SHIFT 0x0008 +#define PNG_SWAP_BYTES 0x0010 +#define PNG_INVERT_MONO 0x0020 +#define PNG_QUANTIZE 0x0040 +#define PNG_COMPOSE 0x0080 /* Was PNG_BACKGROUND */ +#define PNG_BACKGROUND_EXPAND 0x0100 +#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */ +#define PNG_16_TO_8 0x0400 /* Becomes 'chop' in 1.5.4 */ +#define PNG_RGBA 0x0800 +#define PNG_EXPAND 0x1000 +#define PNG_GAMMA 0x2000 +#define PNG_GRAY_TO_RGB 0x4000 +#define PNG_FILLER 0x8000 +#define PNG_PACKSWAP 0x10000 +#define PNG_SWAP_ALPHA 0x20000 +#define PNG_STRIP_ALPHA 0x40000 +#define PNG_INVERT_ALPHA 0x80000 +#define PNG_USER_TRANSFORM 0x100000 +#define PNG_RGB_TO_GRAY_ERR 0x200000 +#define PNG_RGB_TO_GRAY_WARN 0x400000 +#define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ +#define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ +#define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ +#define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ +#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ + /* 0x8000000 unused */ + /* 0x10000000 unused */ + /* 0x20000000 unused */ + /* 0x40000000 unused */ +/* Flags for png_create_struct */ +#define PNG_STRUCT_PNG 0x0001 +#define PNG_STRUCT_INFO 0x0002 + +/* Scaling factor for filter heuristic weighting calculations */ +#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) +#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) + +/* Flags for the png_ptr->flags rather than declaring a byte for each one */ +#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 +#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 +#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 +#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 +#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 +#define PNG_FLAG_ZLIB_FINISHED 0x0020 +#define PNG_FLAG_ROW_INIT 0x0040 +#define PNG_FLAG_FILLER_AFTER 0x0080 +#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 +#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 +#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 +#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 +#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ +#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 +#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 +#define PNG_FLAG_LIBRARY_MISMATCH 0x20000 +#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 +#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 +#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 + /* 0x200000 unused */ + /* 0x400000 unused */ +#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ +#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ +#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ +#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 +#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 +#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 + /* 0x20000000 unused */ + /* 0x40000000 unused */ + +#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ + PNG_FLAG_CRC_ANCILLARY_NOWARN) + +#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ + PNG_FLAG_CRC_CRITICAL_IGNORE) + +#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ + PNG_FLAG_CRC_CRITICAL_MASK) + +/* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib + * can handle at once. This type need be no larger than 16 bits (so maximum of + * 65535), this define allows us to discover how big it is, but limited by the + * maximuum for png_size_t. The value can be overriden in a library build + * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably + * lower value (e.g. 255 works). A lower value may help memory usage (slightly) + * and may even improve performance on some systems (and degrade it on others.) + */ +#ifndef ZLIB_IO_MAX +# define ZLIB_IO_MAX ((uInt)-1) +#endif + +/* Save typing and make code easier to understand */ + +#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ + abs((int)((c1).green) - (int)((c2).green)) + \ + abs((int)((c1).blue) - (int)((c2).blue))) + +/* Added to libpng-1.2.6 JB */ +#define PNG_ROWBYTES(pixel_bits, width) \ + ((pixel_bits) >= 8 ? \ + ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ + (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) ) + +/* PNG_OUT_OF_RANGE returns true if value is outside the range + * ideal-delta..ideal+delta. Each argument is evaluated twice. + * "ideal" and "delta" should be constants, normally simple + * integers, "value" a variable. Added to libpng-1.2.6 JB + */ +#define PNG_OUT_OF_RANGE(value, ideal, delta) \ + ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) + +/* Conversions between fixed and floating point, only defined if + * required (to make sure the code doesn't accidentally use float + * when it is supposedly disabled.) + */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +/* The floating point conversion can't overflow, though it can and + * does lose accuracy relative to the original fixed point value. + * In practice this doesn't matter because png_fixed_point only + * stores numbers with very low precision. The png_ptr and s + * arguments are unused by default but are there in case error + * checking becomes a requirement. + */ +#define png_float(png_ptr, fixed, s) (.00001 * (fixed)) + +/* The fixed point conversion performs range checking and evaluates + * its argument multiple times, so must be used with care. The + * range checking uses the PNG specification values for a signed + * 32 bit fixed point value except that the values are deliberately + * rounded-to-zero to an integral value - 21474 (21474.83 is roughly + * (2^31-1) * 100000). 's' is a string that describes the value being + * converted. + * + * NOTE: this macro will raise a png_error if the range check fails, + * therefore it is normally only appropriate to use this on values + * that come from API calls or other sources where an out of range + * error indicates a programming error, not a data error! + * + * NOTE: by default this is off - the macro is not used - because the + * function call saves a lot of code. + */ +#ifdef PNG_FIXED_POINT_MACRO_SUPPORTED +#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ + ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) +#else +PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, + png_const_charp text)); +#endif +#endif + +/* Constants for known chunk types. If you need to add a chunk, define the name + * here. For historical reasons these constants have the form png_; i.e. + * the prefix is lower case. Please use decimal values as the parameters to + * match the ISO PNG specification and to avoid relying on the C locale + * interpretation of character values. + * + * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values + * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string + * to be generated if required. + * + * PNG_32b correctly produces a value shifted by up to 24 bits, even on + * architectures where (int) is only 16 bits. + */ +#define PNG_32b(b,s) ((png_uint_32)(b) << (s)) +#define PNG_CHUNK(b1,b2,b3,b4) \ + (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) + +#define png_IHDR PNG_CHUNK( 73, 72, 68, 82) +#define png_IDAT PNG_CHUNK( 73, 68, 65, 84) +#define png_IEND PNG_CHUNK( 73, 69, 78, 68) +#define png_PLTE PNG_CHUNK( 80, 76, 84, 69) +#define png_bKGD PNG_CHUNK( 98, 75, 71, 68) +#define png_cHRM PNG_CHUNK( 99, 72, 82, 77) +#define png_gAMA PNG_CHUNK(103, 65, 77, 65) +#define png_hIST PNG_CHUNK(104, 73, 83, 84) +#define png_iCCP PNG_CHUNK(105, 67, 67, 80) +#define png_iTXt PNG_CHUNK(105, 84, 88, 116) +#define png_oFFs PNG_CHUNK(111, 70, 70, 115) +#define png_pCAL PNG_CHUNK(112, 67, 65, 76) +#define png_sCAL PNG_CHUNK(115, 67, 65, 76) +#define png_pHYs PNG_CHUNK(112, 72, 89, 115) +#define png_sBIT PNG_CHUNK(115, 66, 73, 84) +#define png_sPLT PNG_CHUNK(115, 80, 76, 84) +#define png_sRGB PNG_CHUNK(115, 82, 71, 66) +#define png_sTER PNG_CHUNK(115, 84, 69, 82) +#define png_tEXt PNG_CHUNK(116, 69, 88, 116) +#define png_tIME PNG_CHUNK(116, 73, 77, 69) +#define png_tRNS PNG_CHUNK(116, 82, 78, 83) +#define png_zTXt PNG_CHUNK(122, 84, 88, 116) + +/* The following will work on (signed char*) strings, whereas the get_uint_32 + * macro will fail on top-bit-set values because of the sign extension. + */ +#define PNG_CHUNK_FROM_STRING(s)\ + PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3]) + +/* This uses (char), not (png_byte) to avoid warnings on systems where (char) is + * signed and the argument is a (char[]) This macro will fail miserably on + * systems where (char) is more than 8 bits. + */ +#define PNG_STRING_FROM_CHUNK(s,c)\ + (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ + ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) + +/* Do the same but terminate with a null character. */ +#define PNG_CSTRING_FROM_CHUNK(s,c)\ + (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0) + +/* Test on flag values as defined in the spec (section 5.4): */ +#define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29)) +#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c)) +#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) +#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) +#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) + +/* Gamma values (new at libpng-1.5.4): */ +#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */ +#define PNG_GAMMA_MAC_INVERSE 65909 +#define PNG_GAMMA_sRGB_INVERSE 45455 + + +/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* These functions are used internally in the code. They generally + * shouldn't be used unless you are writing code to add or replace some + * functionality in libpng. More information about most functions can + * be found in the files where the functions are located. + */ + +/* Check the user version string for compatibility, returns false if the version + * numbers aren't compatible. + */ +PNG_EXTERN int png_user_version_check(png_structp png_ptr, + png_const_charp user_png_ver); + +/* Allocate memory for an internal libpng struct */ +PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), + PNG_ALLOCATED); + +/* Free memory from internal libpng struct */ +PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); + +PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, + PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), + PNG_ALLOCATED); +PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, + png_free_ptr free_fn, png_voidp mem_ptr)); + +/* Free any memory that info_ptr points to and reset struct. */ +PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, + png_infop info_ptr)); + +/* Function to allocate memory for zlib. PNGAPI is disallowed. */ +PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, + uInt size)),PNG_ALLOCATED); + +/* Function to free memory for zlib. PNGAPI is disallowed. */ +PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); + +/* Next four functions are used internally as callbacks. PNGCBAPI is required + * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to + * PNGCBAPI at 1.5.0 + */ + +PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t length)); +#endif + +PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +# ifdef PNG_STDIO_SUPPORTED +PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); +# endif +#endif + +/* Reset the CRC variable */ +PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); + +/* Write the "data" buffer to whatever output you are using */ +PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, + png_const_bytep data, png_size_t length)); + +/* Read and check the PNG file signature */ +PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); + +/* Read the chunk header (length + type name) */ +PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); + +/* Read data from whatever input you are using into the "data" buffer */ +PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, + png_size_t length)); + +/* Read bytes into buf, and update png_ptr->crc */ +PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, + png_size_t length)); + +/* Decompress data in a chunk that uses compression */ +#if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) +PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, + int comp_type, png_size_t chunklength, png_size_t prefix_length, + png_size_t *data_length)); +#endif + +/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ +PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); + +/* Read the CRC from the file and compare it to the libpng calculated CRC */ +PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); + +/* Calculate the CRC over a section of data. Note that we are only + * passing a maximum of 64K on systems that have this as a memory limit, + * since this is the maximum buffer size we can specify. + */ +PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, + png_const_bytep ptr, png_size_t length)); + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); +#endif + +/* Write various chunks */ + +/* Write the IHDR chunk, and update the png_struct with the necessary + * information. + */ +PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, + png_uint_32 height, + int bit_depth, int color_type, int compression_method, int filter_method, + int interlace_method)); + +PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, + png_const_colorp palette, png_uint_32 num_pal)); + +PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, + png_size_t length)); + +PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); + +#ifdef PNG_WRITE_gAMA_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); +# endif +# ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, + png_fixed_point file_gamma)); +# endif +#endif + +#ifdef PNG_WRITE_sBIT_SUPPORTED +PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, + png_const_color_8p sbit, int color_type)); +#endif + +#ifdef PNG_WRITE_cHRM_SUPPORTED +# ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, + double white_x, double white_y, + double red_x, double red_y, double green_x, double green_y, + double blue_x, double blue_y)); +# endif +PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); +#endif + +#ifdef PNG_WRITE_sRGB_SUPPORTED +PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, + int intent)); +#endif + +#ifdef PNG_WRITE_iCCP_SUPPORTED +PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, + png_const_charp name, int compression_type, + png_const_charp profile, int proflen)); + /* Note to maintainer: profile should be png_bytep */ +#endif + +#ifdef PNG_WRITE_sPLT_SUPPORTED +PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, + png_const_sPLT_tp palette)); +#endif + +#ifdef PNG_WRITE_tRNS_SUPPORTED +PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, + png_const_bytep trans, png_const_color_16p values, int number, + int color_type)); +#endif + +#ifdef PNG_WRITE_bKGD_SUPPORTED +PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, + png_const_color_16p values, int color_type)); +#endif + +#ifdef PNG_WRITE_hIST_SUPPORTED +PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, + png_const_uint_16p hist, int num_hist)); +#endif + +/* Chunks that have keywords */ +#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ + defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) +PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, + png_const_charp key, png_charpp new_key)); +#endif + +#ifdef PNG_WRITE_tEXt_SUPPORTED +PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, + png_const_charp text, png_size_t text_len)); +#endif + +#ifdef PNG_WRITE_zTXt_SUPPORTED +PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, + png_const_charp text, png_size_t text_len, int compression)); +#endif + +#ifdef PNG_WRITE_iTXt_SUPPORTED +PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, + int compression, png_const_charp key, png_const_charp lang, + png_const_charp lang_key, png_const_charp text)); +#endif + +#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ +PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, + png_infop info_ptr, png_const_textp text_ptr, int num_text)); +#endif + +#ifdef PNG_WRITE_oFFs_SUPPORTED +PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, + png_int_32 x_offset, png_int_32 y_offset, int unit_type)); +#endif + +#ifdef PNG_WRITE_pCAL_SUPPORTED +PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, + png_int_32 X0, png_int_32 X1, int type, int nparams, + png_const_charp units, png_charpp params)); +#endif + +#ifdef PNG_WRITE_pHYs_SUPPORTED +PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, + png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, + int unit_type)); +#endif + +#ifdef PNG_WRITE_tIME_SUPPORTED +PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, + png_const_timep mod_time)); +#endif + +#ifdef PNG_WRITE_sCAL_SUPPORTED +PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, + int unit, png_const_charp width, png_const_charp height)); +#endif + +/* Called when finished processing a row of data */ +PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); + +/* Internal use only. Called before first row of data */ +PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); + +/* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an + * array of png_ptr->width pixels. If the image is not interlaced or this + * is the final pass this just does a png_memcpy, otherwise the "display" flag + * is used to determine whether to copy pixels that are not in the current pass. + * + * Because 'png_do_read_interlace' (below) replicates pixels this allows this + * function to achieve the documented 'blocky' appearance during interlaced read + * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row' + * are not changed if they are not in the current pass, when display is 0. + * + * 'display' must be 0 or 1, otherwise the memcpy will be done regardless. + * + * The API always reads from the png_struct row buffer and always assumes that + * it is full width (png_do_read_interlace has already been called.) + * + * This function is only ever used to write to row buffers provided by the + * caller of the relevant libpng API and the row must have already been + * transformed by the read transformations. + * + * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed + * bitmasks for use within the code, otherwise runtime generated masks are used. + * The default is compile time masks. + */ +#ifndef PNG_USE_COMPILE_TIME_MASKS +# define PNG_USE_COMPILE_TIME_MASKS 1 +#endif +PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, + int display)); + +#ifdef PNG_READ_INTERLACING_SUPPORTED +/* Expand an interlaced row: the 'row_info' describes the pass data that has + * been read in and must correspond to the pixels in 'row', the pixels are + * expanded (moved apart) in 'row' to match the final layout, when doing this + * the pixels are *replicated* to the intervening space. This is essential for + * the correct operation of png_combine_row, above. + */ +PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, + png_bytep row, int pass, png_uint_32 transformations)); +#endif + +/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ + +#ifdef PNG_WRITE_INTERLACING_SUPPORTED +/* Grab pixels out of a row for an interlaced pass */ +PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, + png_bytep row, int pass)); +#endif + +/* Unfilter a row: check the filter value before calling this, there is no point + * calling it for PNG_FILTER_VALUE_NONE. + */ +PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info, + png_bytep row, png_const_bytep prev_row, int filter)); + +PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); +PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep prev_row)); + +/* Choose the best filter to use and filter the row data */ +PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, + png_row_infop row_info)); + +/* Finish a row while reading, dealing with interlacing passes, etc. */ +PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); + +/* Initialize the row buffers, etc. */ +PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +/* Optional call to update the users info structure */ +PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, + png_infop info_ptr)); +#endif + +/* These are the functions that do the transformations */ +#ifdef PNG_READ_FILLER_SUPPORTED +PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, + png_bytep row, png_uint_32 filler, png_uint_32 flags)); +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED +PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED +PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED +PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED +PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ + defined(PNG_READ_STRIP_ALPHA_SUPPORTED) +PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, + png_bytep row, int at_start)); +#endif + +#ifdef PNG_16BIT_SUPPORTED +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, + png_bytep row)); +#endif +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ + defined(PNG_WRITE_PACKSWAP_SUPPORTED) +PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, + png_row_infop row_info, png_bytep row)); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_PACK_SUPPORTED +PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED +PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, + png_bytep row, png_const_color_8p sig_bits)); +#endif + +#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) +PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, + png_bytep row, png_const_bytep palette_lookup, + png_const_bytep quantize_lookup)); + +# ifdef PNG_CORRECT_PALETTE_SUPPORTED +PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, + png_colorp palette, int num_palette)); +# endif +#endif + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +#ifdef PNG_WRITE_PACK_SUPPORTED +PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, + png_bytep row, png_uint_32 bit_depth)); +#endif + +#ifdef PNG_WRITE_SHIFT_SUPPORTED +PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, + png_bytep row, png_const_color_8p bit_depth)); +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) +PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, + png_bytep row, png_structp png_ptr)); +#endif + +#ifdef PNG_READ_EXPAND_SUPPORTED +PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, + png_bytep row, png_const_colorp palette, png_const_bytep trans, + int num_trans)); +PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, + png_bytep row, png_const_color_16p trans_color)); +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +/* The following decodes the appropriate chunks, and does error correction, + * then calls the appropriate callback for the chunk if it is valid. + */ + +/* Decode the IHDR chunk */ +PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); + +#ifdef PNG_READ_bKGD_SUPPORTED +PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_cHRM_SUPPORTED +PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_gAMA_SUPPORTED +PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_hIST_SUPPORTED +PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_iCCP_SUPPORTED +PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif /* PNG_READ_iCCP_SUPPORTED */ + +#ifdef PNG_READ_iTXt_SUPPORTED +PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_oFFs_SUPPORTED +PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED +PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_pHYs_SUPPORTED +PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_sBIT_SUPPORTED +PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_sCAL_SUPPORTED +PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_sPLT_SUPPORTED +PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif /* PNG_READ_sPLT_SUPPORTED */ + +#ifdef PNG_READ_sRGB_SUPPORTED +PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_tEXt_SUPPORTED +PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_tIME_SUPPORTED +PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_tRNS_SUPPORTED +PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED +PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); +#endif + +PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, + png_uint_32 chunk_name)); + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +/* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk + * name, not a string. + */ +PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, + png_uint_32 chunk_name)); +#endif + +/* Handle the transformations for reading and writing */ +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, + png_row_infop row_info)); +#endif +#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED +PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, + png_row_infop row_info)); +#endif + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, + png_uint_32 length)); +PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t buffer_length)); +PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t buffer_length)); +PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); +PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); +PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); +PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, + png_infop info_ptr)); +PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); +# ifdef PNG_READ_tEXt_SUPPORTED +PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); +PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, + png_infop info_ptr)); +# endif +# ifdef PNG_READ_zTXt_SUPPORTED +PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); +PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, + png_infop info_ptr)); +# endif +# ifdef PNG_READ_iTXt_SUPPORTED +PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); +PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, + png_infop info_ptr)); +# endif + +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +#ifdef PNG_MNG_FEATURES_SUPPORTED +PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, + png_bytep row)); +PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, + png_bytep row)); +#endif + +/* Added at libpng version 1.4.0 */ +#ifdef PNG_CHECK_cHRM_SUPPORTED +PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); +#endif + +#ifdef PNG_CHECK_cHRM_SUPPORTED +/* Added at libpng version 1.2.34 and 1.4.0 */ +/* Currently only used by png_check_cHRM_fixed */ +PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, + unsigned long *hi_product, unsigned long *lo_product)); +#endif + +#ifdef PNG_cHRM_SUPPORTED +/* Added at libpng version 1.5.5 */ +typedef struct png_xy +{ + png_fixed_point redx, redy; + png_fixed_point greenx, greeny; + png_fixed_point bluex, bluey; + png_fixed_point whitex, whitey; +} png_xy; + +typedef struct png_XYZ +{ + png_fixed_point redX, redY, redZ; + png_fixed_point greenX, greenY, greenZ; + png_fixed_point blueX, blueY, blueZ; +} png_XYZ; + +/* The conversion APIs return 0 on success, non-zero on a parameter error. They + * allow conversion between the above representations of a color encoding. When + * converting from XYZ end points to chromaticities the absolute magnitude of + * the end points is lost, when converting back the sum of the Y values of the + * three end points will be 1.0 + */ +PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); +PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); +PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, + png_XYZ *XYZ, png_xy xy)); +#endif + +/* Added at libpng version 1.4.0 */ +PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type)); + +/* Free all memory used by the read (old method - NOT DLL EXPORTED) */ +PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, + png_infop info_ptr, png_infop end_info_ptr)); + +/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ +PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); + +#ifdef USE_FAR_KEYWORD /* memory model conversion function */ +PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, + int check)); +#endif /* USE_FAR_KEYWORD */ + +#if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) +PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, + png_const_charp name),PNG_NORETURN); +#endif + +/* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite + * the end. Always leaves the buffer nul terminated. Never errors out (and + * there is no error code.) + */ +PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, + png_const_charp string); + +/* Various internal functions to handle formatted warning messages, currently + * only implemented for warnings. + */ +#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) +/* Utility to dump an unsigned value into a buffer, given a start pointer and + * and end pointer (which should point just *beyond* the end of the buffer!) + * Returns the pointer to the start of the formatted string. This utility only + * does unsigned values. + */ +PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, + int format, png_alloc_size_t number); + +/* Convenience macro that takes an array: */ +#define PNG_FORMAT_NUMBER(buffer,format,number) \ + png_format_number(buffer, buffer + (sizeof buffer), format, number) + +/* Suggested size for a number buffer (enough for 64 bits and a sign!) */ +#define PNG_NUMBER_BUFFER_SIZE 24 + +/* These are the integer formats currently supported, the name is formed from + * the standard printf(3) format string. + */ +#define PNG_NUMBER_FORMAT_u 1 /* chose unsigned API! */ +#define PNG_NUMBER_FORMAT_02u 2 +#define PNG_NUMBER_FORMAT_d 1 /* chose signed API! */ +#define PNG_NUMBER_FORMAT_02d 2 +#define PNG_NUMBER_FORMAT_x 3 +#define PNG_NUMBER_FORMAT_02x 4 +#define PNG_NUMBER_FORMAT_fixed 5 /* choose the signed API */ +#endif + +#ifdef PNG_WARNINGS_SUPPORTED +/* New defines and members adding in libpng-1.5.4 */ +# define PNG_WARNING_PARAMETER_SIZE 32 +# define PNG_WARNING_PARAMETER_COUNT 8 + +/* An l-value of this type has to be passed to the APIs below to cache the + * values of the parameters to a formatted warning message. + */ +typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ + PNG_WARNING_PARAMETER_SIZE]; + +PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, + png_const_charp string); + /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, + * including the trailing '\0'. + */ +PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, + int number, int format, png_alloc_size_t value); + /* Use png_alloc_size_t because it is an unsigned type as big as any we + * need to output. Use the following for a signed value. + */ +PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, + int number, int format, png_int_32 value); + +PNG_EXTERN void png_formatted_warning(png_structp png_ptr, + png_warning_parameters p, png_const_charp message); + /* 'message' follows the X/Open approach of using @1, @2 to insert + * parameters previously supplied using the above functions. Errors in + * specifying the paramters will simple result in garbage substitutions. + */ +#endif + +/* ASCII to FP interfaces, currently only implemented if sCAL + * support is required. + */ +#if defined(PNG_READ_sCAL_SUPPORTED) +/* MAX_DIGITS is actually the maximum number of characters in an sCAL + * width or height, derived from the precision (number of significant + * digits - a build time settable option) and assumpitions about the + * maximum ridiculous exponent. + */ +#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) + +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, + png_size_t size, double fp, unsigned int precision)); +#endif /* FLOATING_POINT */ + +#ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, + png_charp ascii, png_size_t size, png_fixed_point fp)); +#endif /* FIXED_POINT */ +#endif /* READ_sCAL */ + +#if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) +/* An internal API to validate the format of a floating point number. + * The result is the index of the next character. If the number is + * not valid it will be the index of a character in the supposed number. + * + * The format of a number is defined in the PNG extensions specification + * and this API is strictly conformant to that spec, not anyone elses! + * + * The format as a regular expression is: + * + * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)? + * + * or: + * + * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)? + * + * The complexity is that either integer or fraction must be present and the + * fraction is permitted to have no digits only if the integer is present. + * + * NOTE: The dangling E problem. + * There is a PNG valid floating point number in the following: + * + * PNG floating point numb1.ers are not greedy. + * + * Working this out requires *TWO* character lookahead (because of the + * sign), the parser does not do this - it will fail at the 'r' - this + * doesn't matter for PNG sCAL chunk values, but it requires more care + * if the value were ever to be embedded in something more complex. Use + * ANSI-C strtod if you need the lookahead. + */ +/* State table for the parser. */ +#define PNG_FP_INTEGER 0 /* before or in integer */ +#define PNG_FP_FRACTION 1 /* before or in fraction */ +#define PNG_FP_EXPONENT 2 /* before or in exponent */ +#define PNG_FP_STATE 3 /* mask for the above */ +#define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */ +#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */ +#define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */ +#define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */ +#define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */ + +/* These three values don't affect the parser. They are set but not used. + */ +#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */ +#define PNG_FP_NEGATIVE 128 /* A negative number, including "-0" */ +#define PNG_FP_NONZERO 256 /* A non-zero value */ +#define PNG_FP_STICKY 448 /* The above three flags */ + +/* This is available for the caller to store in 'state' if required. Do not + * call the parser after setting it (the parser sometimes clears it.) + */ +#define PNG_FP_INVALID 512 /* Available for callers as a distinct value */ + +/* Result codes for the parser (boolean - true meants ok, false means + * not ok yet.) + */ +#define PNG_FP_MAYBE 0 /* The number may be valid in the future */ +#define PNG_FP_OK 1 /* The number is valid */ + +/* Tests on the sticky non-zero and negative flags. To pass these checks + * the state must also indicate that the whole number is valid - this is + * achieved by testing PNG_FP_SAW_DIGIT (see the implementation for why this + * is equivalent to PNG_FP_OK above.) + */ +#define PNG_FP_NZ_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NEGATIVE | PNG_FP_NONZERO) + /* NZ_MASK: the string is valid and a non-zero negative value */ +#define PNG_FP_Z_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NONZERO) + /* Z MASK: the string is valid and a non-zero value. */ + /* PNG_FP_SAW_DIGIT: the string is valid. */ +#define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT) +#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK) +#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK) + +/* The actual parser. This can be called repeatedly, it updates + * the index into the string and the state variable (which must + * be initialzed to 0). It returns a result code, as above. There + * is no point calling the parser any more if it fails to advance to + * the end of the string - it is stuck on an invalid character (or + * terminated by '\0'). + * + * Note that the pointer will consume an E or even an E+ then leave + * a 'maybe' state even though a preceding integer.fraction is valid. + * The PNG_FP_WAS_VALID flag indicates that a preceding substring was + * a valid number. It's possible to recover from this by calling + * the parser again (from the start, with state 0) but with a string + * that omits the last character (i.e. set the size to the index of + * the problem character.) This has not been tested within libpng. + */ +PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, + png_size_t size, int *statep, png_size_tp whereami)); + +/* This is the same but it checks a complete string and returns true + * only if it just contains a floating point number. As of 1.5.4 this + * function also returns the state at the end of parsing the number if + * it was valid (otherwise it returns 0.) This can be used for testing + * for negative or zero values using the sticky flag. + */ +PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, + png_size_t size)); +#endif /* pCAL || sCAL */ + +#if defined(PNG_READ_GAMMA_SUPPORTED) ||\ + defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) +/* Added at libpng version 1.5.0 */ +/* This is a utility to provide a*times/div (rounded) and indicate + * if there is an overflow. The result is a boolean - false (0) + * for overflow, true (1) if no overflow, in which case *res + * holds the result. + */ +PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, + png_int_32 multiplied_by, png_int_32 divided_by)); +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) +/* Same deal, but issue a warning on overflow and return 0. */ +PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, + png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Calculate a reciprocal - used for gamma values. This returns + * 0 if the argument is 0 in order to maintain an undefined value, + * there are no warnings. + */ +PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); + +/* The same but gives a reciprocal of the product of two fixed point + * values. Accuracy is suitable for gamma calculations but this is + * not exact - use png_muldiv for that. + */ +PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, + png_fixed_point b)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Internal fixed point gamma correction. These APIs are called as + * required to convert single values - they don't need to be fast, + * they are not used when processing image pixel values. + * + * While the input is an 'unsigned' value it must actually be the + * correct bit value - 0..255 or 0..65535 as required. + */ +PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, + unsigned int value, png_fixed_point gamma_value)); +PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); +PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, + png_fixed_point gamma_value)); +PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, + png_fixed_point gamma_value)); +PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); +PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, + int bit_depth)); +#endif + +/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ + +#include "pngdebug.h" + +#ifdef __cplusplus +} +#endif + +#endif /* PNGPRIV_H */ diff --git a/ExternalLibs/glpng/png/pngread.c b/ExternalLibs/glpng/png/pngread.c index 9f86592..e2641d5 100644 --- a/ExternalLibs/glpng/png/pngread.c +++ b/ExternalLibs/glpng/png/pngread.c @@ -1,765 +1,1308 @@ - -/* pngread.c - read a PNG file - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file contains routines that an application calls directly to - * read a PNG file or stream. - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Create a PNG structure for reading, and allocate any memory needed. */ -png_structp -png_create_read_struct(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn) -{ - -#ifdef PNG_USER_MEM_SUPPORTED - return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, - warn_fn, NULL, NULL, NULL)); -} - -/* Alternate create PNG structure for reading, and allocate any memory needed. */ -png_structp -png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn) -{ -#endif /* PNG_USER_MEM_SUPPORTED */ - - png_structp png_ptr; -#ifdef USE_FAR_KEYWORD - jmp_buf jmpbuf; -#endif - png_debug(1, "in png_create_read_struct\n"); -#ifdef PNG_USER_MEM_SUPPORTED - if ((png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, - (png_malloc_ptr)malloc_fn)) == NULL) -#else - if ((png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG)) == NULL) -#endif - { - return (png_structp)NULL; - } -#ifdef USE_FAR_KEYWORD - if (setjmp(jmpbuf)) -#else - if (setjmp(png_ptr->jmpbuf)) -#endif - { - png_free(png_ptr, png_ptr->zbuf); - png_destroy_struct(png_ptr); - return (png_structp)NULL; - } -#ifdef USE_FAR_KEYWORD - png_memcpy(png_ptr->jmpbuf,jmpbuf,sizeof(jmp_buf)); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); -#endif /* PNG_USER_MEM_SUPPORTED */ - - png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); - - /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so - * we must recompile any applications that use any older library version. - * For versions after libpng 1.0, we will be compatible, so we need - * only check the first digit. - */ - if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || - (user_png_ver[0] == '0' && user_png_ver[2] < '9')) - { - png_error(png_ptr, - "Incompatible libpng version in application and library"); - } - - /* initialize zbuf - compression buffer */ - png_ptr->zbuf_size = PNG_ZBUF_SIZE; - png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, - (png_uint_32)png_ptr->zbuf_size); - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; - png_ptr->zstream.opaque = (voidpf)png_ptr; - - switch (inflateInit(&png_ptr->zstream)) - { - case Z_OK: /* Do nothing */ break; - case Z_MEM_ERROR: - case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory error"); break; - case Z_VERSION_ERROR: png_error(png_ptr, "zlib version error"); break; - default: png_error(png_ptr, "Unknown zlib error"); - } - - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - png_set_read_fn(png_ptr, NULL, NULL); - - return (png_ptr); -} - -/* Read the information before the actual image data. This has been - * changed in v0.90 to allow reading a file that already has the magic - * bytes read from the stream. You can tell libpng how many bytes have - * been read from the beginning of the stream (up to the maximum of 8) - * via png_set_sig_bytes(), and we will only check the remaining bytes - * here. The application can then have access to the signature bytes we - * read if it is determined that this isn't a valid PNG file. - */ -void -png_read_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_info\n"); - /* save jump buffer and error functions */ - /* If we haven't checked all of the PNG signature bytes, do so now. */ - if (png_ptr->sig_bytes < 8) - { - png_size_t num_checked = png_ptr->sig_bytes, - num_to_check = 8 - num_checked; - - png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); - png_ptr->sig_bytes = 8; - - if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) - { - if (num_checked < 4 && - png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) - png_error(png_ptr, "Not a PNG file"); - else - png_error(png_ptr, "PNG file corrupted by ASCII conversion"); - } - } - - for(;;) - { - png_byte chunk_length[4]; - png_uint_32 length; - - png_read_data(png_ptr, chunk_length, 4); - length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - - png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name); - - /* This should be a binary subdivision search or a hash for - * matching the chunk name rather than a linear search. - */ - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_handle_PLTE(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - png_handle_IEND(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before IDAT"); - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; - break; - } -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - png_handle_hIST(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - png_handle_tIME(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } -} - -/* optional call to update the users info_ptr structure */ -void -png_read_update_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_update_info\n"); - /* save jump buffer and error functions */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - png_read_transform_info(png_ptr, info_ptr); -} - -void -png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) -{ - int ret; - png_debug2(1, "in png_read_row (row %d, pass %d)\n", - png_ptr->row_number, png_ptr->pass); - /* save jump buffer and error functions */ - if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) - png_read_start_row(png_ptr); - if (png_ptr->row_number == 0 && png_ptr->pass == 0) - { - /* check for transforms that have been set but were defined out */ -#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && !defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined."); -#endif -#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined."); -#endif - } - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* if interlaced and we do not need a new row, combine row and return */ - if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) - { - switch (png_ptr->pass) - { - case 0: - if (png_ptr->row_number & 7) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 1: - if ((png_ptr->row_number & 7) || png_ptr->width < 5) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 2: - if ((png_ptr->row_number & 7) != 4) - { - if (dsp_row != NULL && (png_ptr->row_number & 4)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 3: - if ((png_ptr->row_number & 3) || png_ptr->width < 3) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 4: - if ((png_ptr->row_number & 3) != 2) - { - if (dsp_row != NULL && (png_ptr->row_number & 2)) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 5: - if ((png_ptr->row_number & 1) || png_ptr->width < 2) - { - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - png_read_finish_row(png_ptr); - return; - } - break; - case 6: - if (!(png_ptr->row_number & 1)) - { - png_read_finish_row(png_ptr); - return; - } - break; - } - } -#endif - - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - png_error(png_ptr, "Invalid attempt to read row data"); - - png_ptr->zstream.next_out = png_ptr->row_buf; - png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; - do - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_byte chunk_length[4]; - - png_crc_finish(png_ptr, 0); - - png_read_data(png_ptr, chunk_length, 4); - png_ptr->idat_size = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, - (png_size_t)png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret == Z_STREAM_END) - { - if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression error"); - - } while (png_ptr->zstream.avail_out); - - png_ptr->row_info.color_type = png_ptr->color_type; - png_ptr->row_info.width = png_ptr->iwidth; - png_ptr->row_info.channels = png_ptr->channels; - png_ptr->row_info.bit_depth = png_ptr->bit_depth; - png_ptr->row_info.pixel_depth = png_ptr->pixel_depth; - { - png_ptr->row_info.rowbytes = ((png_ptr->row_info.width * - (png_uint_32)png_ptr->row_info.pixel_depth + 7) >> 3); - } - - png_read_filter_row(png_ptr, &(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->prev_row + 1, - (int)(png_ptr->row_buf[0])); - - png_memcpy_check(png_ptr, png_ptr->prev_row, png_ptr->row_buf, - png_ptr->rowbytes + 1); - - if (png_ptr->transformations) - png_do_read_transformations(png_ptr); - -#if defined(PNG_READ_INTERLACING_SUPPORTED) - /* blow up interlaced rows to full size */ - if (png_ptr->interlaced && - (png_ptr->transformations & PNG_INTERLACE)) - { - if (png_ptr->pass < 6) - png_do_read_interlace(&(png_ptr->row_info), - png_ptr->row_buf + 1, png_ptr->pass, png_ptr->transformations); - - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, - png_pass_dsp_mask[png_ptr->pass]); - if (row != NULL) - png_combine_row(png_ptr, row, - png_pass_mask[png_ptr->pass]); - } - else -#endif - { - if (row != NULL) - png_combine_row(png_ptr, row, 0xff); - if (dsp_row != NULL) - png_combine_row(png_ptr, dsp_row, 0xff); - } - png_read_finish_row(png_ptr); - - if (png_ptr->read_row_fn != NULL) - (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); -} - -/* Read the entire image. If the image has an alpha channel or a tRNS - * chunk, and you have called png_handle_alpha()[*], you will need to - * initialize the image to the current image that PNG will be overlaying. - * We set the num_rows again here, in case it was incorrectly set in - * png_read_start_row() by a call to png_read_update_info() or - * png_start_read_image() if png_set_interlace_handling() wasn't called - * prior to either of these functions like it should have been. You can - * only call this function once. If you desire to have an image for - * each pass of a interlaced image, use png_read_rows() instead. - * - * [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.2. - */ -void -png_read_image(png_structp png_ptr, png_bytepp image) -{ - png_uint_32 i,image_height; - int pass, j; - png_bytepp rp; - - png_debug(1, "in png_read_image\n"); - /* save jump buffer and error functions */ - pass = png_set_interlace_handling(png_ptr); - - image_height=png_ptr->height; - png_ptr->num_rows = image_height; /* Make sure this is set correctly */ - - for (j = 0; j < pass; j++) - { - rp = image; - for (i = 0; i < image_height; i++) - { - png_read_row(png_ptr, *rp, NULL); - rp++; - } - } -} - -/* Read the end of the PNG file. Will not read past the end of the - * file, will verify the end is accurate, and will read any comments - * or time information at the end of the file, if info is not NULL. - */ -void -png_read_end(png_structp png_ptr, png_infop info_ptr) -{ - png_byte chunk_length[4]; - png_uint_32 length; - - png_debug(1, "in png_read_end\n"); - /* save jump buffer and error functions */ - png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ - - do - { - png_read_data(png_ptr, chunk_length, 4); - length = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - - png_debug1(0, "Reading %s chunk.\n", png_ptr->chunk_name); - - if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4)) - png_handle_IHDR(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - { - /* Zero length IDATs are legal after the last IDAT has been - * read, but not after other chunks have been read. - */ - if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT) - png_error(png_ptr, "Too many IDAT's found"); - else - png_crc_finish(png_ptr, 0); - } - else if (!png_memcmp(png_ptr->chunk_name, png_PLTE, 4)) - png_handle_PLTE(png_ptr, info_ptr, length); - else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) - png_handle_IEND(png_ptr, info_ptr, length); -#if defined(PNG_READ_bKGD_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_bKGD, 4)) - png_handle_bKGD(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_cHRM, 4)) - png_handle_cHRM(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_gAMA_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_gAMA, 4)) - png_handle_gAMA(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_hIST_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_hIST, 4)) - png_handle_hIST(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_oFFs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_oFFs, 4)) - png_handle_oFFs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pCAL_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pCAL, 4)) - png_handle_pCAL(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_pHYs_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_pHYs, 4)) - png_handle_pHYs(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sBIT_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sBIT, 4)) - png_handle_sBIT(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_sRGB_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_sRGB, 4)) - png_handle_sRGB(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tEXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4)) - png_handle_tEXt(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tIME_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4)) - png_handle_tIME(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_tRNS_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_tRNS, 4)) - png_handle_tRNS(png_ptr, info_ptr, length); -#endif -#if defined(PNG_READ_zTXt_SUPPORTED) - else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4)) - png_handle_zTXt(png_ptr, info_ptr, length); -#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -} - -/* free all memory used by the read */ -void -png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, - png_infopp end_info_ptr_ptr) -{ - png_structp png_ptr = NULL; - png_infop info_ptr = NULL, end_info_ptr = NULL; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn = NULL; -#endif /* PNG_USER_MEM_SUPPORTED */ - - png_debug(1, "in png_destroy_read_struct\n"); - /* save jump buffer and error functions */ - if (png_ptr_ptr != NULL) - png_ptr = *png_ptr_ptr; - - if (info_ptr_ptr != NULL) - info_ptr = *info_ptr_ptr; - - if (end_info_ptr_ptr != NULL) - end_info_ptr = *end_info_ptr_ptr; - -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_read_destroy(png_ptr, info_ptr, end_info_ptr); - - if (info_ptr != NULL) - { -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) - png_free(png_ptr, info_ptr->text); -#endif - -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)info_ptr, free_fn); -#else - png_destroy_struct((png_voidp)info_ptr); -#endif - *info_ptr_ptr = (png_infop)NULL; - } - - if (end_info_ptr != NULL) - { -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_READ_zTXt_SUPPORTED) - png_free(png_ptr, end_info_ptr->text); -#endif -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)end_info_ptr, free_fn); -#else - png_destroy_struct((png_voidp)end_info_ptr); -#endif - *end_info_ptr_ptr = (png_infop)NULL; - } - - if (png_ptr != NULL) - { -#ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2((png_voidp)png_ptr, free_fn); -#else - png_destroy_struct((png_voidp)png_ptr); -#endif - *png_ptr_ptr = (png_structp)NULL; - } -} - -/* free all memory used by the read (old method) */ -void -png_read_destroy(png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr) -{ - jmp_buf tmp_jmp; - png_error_ptr error_fn; - png_error_ptr warning_fn; - png_voidp error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_free_ptr free_fn; -#endif - - png_debug(1, "in png_read_destroy\n"); - /* save jump buffer and error functions */ - if (info_ptr != NULL) - png_info_destroy(png_ptr, info_ptr); - - if (end_info_ptr != NULL) - png_info_destroy(png_ptr, end_info_ptr); - - png_free(png_ptr, png_ptr->zbuf); - png_free(png_ptr, png_ptr->row_buf); - png_free(png_ptr, png_ptr->prev_row); -#if defined(PNG_READ_DITHER_SUPPORTED) - png_free(png_ptr, png_ptr->palette_lookup); - png_free(png_ptr, png_ptr->dither_index); -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_table); -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_from_1); - png_free(png_ptr, png_ptr->gamma_to_1); -#endif - if (png_ptr->flags & PNG_FLAG_FREE_PALETTE) - png_zfree(png_ptr, png_ptr->palette); - if (png_ptr->flags & PNG_FLAG_FREE_TRANS) - png_free(png_ptr, png_ptr->trans); -#if defined(PNG_READ_hIST_SUPPORTED) - if (png_ptr->flags & PNG_FLAG_FREE_HIST) - png_free(png_ptr, png_ptr->hist); -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->gamma_16_table != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_table[i]); - } - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - png_free(png_ptr, png_ptr->gamma_16_table); - if (png_ptr->gamma_16_from_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_from_1[i]); - } - } - png_free(png_ptr, png_ptr->gamma_16_from_1); - if (png_ptr->gamma_16_to_1 != NULL) - { - int i; - int istop = (1 << (8 - png_ptr->gamma_shift)); - for (i = 0; i < istop; i++) - { - png_free(png_ptr, png_ptr->gamma_16_to_1[i]); - } - } - png_free(png_ptr, png_ptr->gamma_16_to_1); -#endif -#endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_free(png_ptr, png_ptr->time_buffer); -#endif /* PNG_TIME_RFC1123_SUPPORTED */ - - inflateEnd(&png_ptr->zstream); -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_free(png_ptr, png_ptr->save_buffer); -#endif - - /* Save the important info out of the png_struct, in case it is - * being used again. - */ - png_memcpy(tmp_jmp, png_ptr->jmpbuf, sizeof (jmp_buf)); - - error_fn = png_ptr->error_fn; - warning_fn = png_ptr->warning_fn; - error_ptr = png_ptr->error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - free_fn = png_ptr->free_fn; -#endif - - png_memset(png_ptr, 0, sizeof (png_struct)); - - png_ptr->error_fn = error_fn; - png_ptr->warning_fn = warning_fn; - png_ptr->error_ptr = error_ptr; -#ifdef PNG_USER_MEM_SUPPORTED - png_ptr->free_fn = free_fn; -#endif - - png_memcpy(png_ptr->jmpbuf, tmp_jmp, sizeof (jmp_buf)); -} - + +/* pngread.c - read a PNG file + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file contains routines that an application calls directly to + * read a PNG file or stream. + */ + +#include "pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +/* Create a PNG structure for reading, and allocate any memory needed. */ +PNG_FUNCTION(png_structp,PNGAPI +png_create_read_struct,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn),PNG_ALLOCATED) +{ + +#ifdef PNG_USER_MEM_SUPPORTED + return (png_create_read_struct_2(user_png_ver, error_ptr, error_fn, + warn_fn, NULL, NULL, NULL)); +} + +/* Alternate create PNG structure for reading, and allocate any memory + * needed. + */ +PNG_FUNCTION(png_structp,PNGAPI +png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn),PNG_ALLOCATED) +{ +#endif /* PNG_USER_MEM_SUPPORTED */ + +#ifdef PNG_SETJMP_SUPPORTED + volatile +#endif + png_structp png_ptr; + volatile int png_cleanup_needed = 0; + +#ifdef PNG_SETJMP_SUPPORTED +#ifdef USE_FAR_KEYWORD + jmp_buf tmp_jmpbuf; +#endif +#endif + + png_debug(1, "in png_create_read_struct"); + +#ifdef PNG_USER_MEM_SUPPORTED + png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, + malloc_fn, mem_ptr); +#else + png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); +#endif + if (png_ptr == NULL) + return (NULL); + + /* Added at libpng-1.2.6 */ +#ifdef PNG_USER_LIMITS_SUPPORTED + png_ptr->user_width_max = PNG_USER_WIDTH_MAX; + png_ptr->user_height_max = PNG_USER_HEIGHT_MAX; + +# ifdef PNG_USER_CHUNK_CACHE_MAX + /* Added at libpng-1.2.43 and 1.4.0 */ + png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX; +# endif + +# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX + /* Added at libpng-1.2.43 and 1.4.1 */ + png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX; +# endif +#endif + +#ifdef PNG_SETJMP_SUPPORTED +/* Applications that neglect to set up their own setjmp() and then + * encounter a png_error() will longjmp here. Since the jmpbuf is + * then meaningless we abort instead of returning. + */ +#ifdef USE_FAR_KEYWORD + if (setjmp(tmp_jmpbuf)) +#else + if (setjmp(png_jmpbuf(png_ptr))) /* Sets longjmp to match setjmp */ +#endif + PNG_ABORT(); +#ifdef USE_FAR_KEYWORD + png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf)); +#endif +#endif /* PNG_SETJMP_SUPPORTED */ + +#ifdef PNG_USER_MEM_SUPPORTED + png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); +#endif + + png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); + + /* Call the general version checker (shared with read and write code): */ + if (!png_user_version_check(png_ptr, user_png_ver)) + png_cleanup_needed = 1; + + if (!png_cleanup_needed) + { + /* Initialize zbuf - compression buffer */ + png_ptr->zbuf_size = PNG_ZBUF_SIZE; + png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr, png_ptr->zbuf_size); + + if (png_ptr->zbuf == NULL) + png_cleanup_needed = 1; + } + + png_ptr->zstream.zalloc = png_zalloc; + png_ptr->zstream.zfree = png_zfree; + png_ptr->zstream.opaque = (voidpf)png_ptr; + + if (!png_cleanup_needed) + { + switch (inflateInit(&png_ptr->zstream)) + { + case Z_OK: + break; /* Do nothing */ + + case Z_MEM_ERROR: + png_warning(png_ptr, "zlib memory error"); + png_cleanup_needed = 1; + break; + + case Z_STREAM_ERROR: + png_warning(png_ptr, "zlib stream error"); + png_cleanup_needed = 1; + break; + + case Z_VERSION_ERROR: + png_warning(png_ptr, "zlib version error"); + png_cleanup_needed = 1; + break; + + default: png_warning(png_ptr, "Unknown zlib error"); + png_cleanup_needed = 1; + } + } + + if (png_cleanup_needed) + { + /* Clean up PNG structure and deallocate any memory. */ + png_free(png_ptr, png_ptr->zbuf); + png_ptr->zbuf = NULL; +#ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2((png_voidp)png_ptr, + (png_free_ptr)free_fn, (png_voidp)mem_ptr); +#else + png_destroy_struct((png_voidp)png_ptr); +#endif + return (NULL); + } + + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; + + png_set_read_fn(png_ptr, NULL, NULL); + + + return (png_ptr); +} + + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the information before the actual image data. This has been + * changed in v0.90 to allow reading a file that already has the magic + * bytes read from the stream. You can tell libpng how many bytes have + * been read from the beginning of the stream (up to the maximum of 8) + * via png_set_sig_bytes(), and we will only check the remaining bytes + * here. The application can then have access to the signature bytes we + * read if it is determined that this isn't a valid PNG file. + */ +void PNGAPI +png_read_info(png_structp png_ptr, png_infop info_ptr) +{ + png_debug(1, "in png_read_info"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + /* Read and check the PNG file signature. */ + png_read_sig(png_ptr, info_ptr); + + for (;;) + { + png_uint_32 length = png_read_chunk_header(png_ptr); + png_uint_32 chunk_name = png_ptr->chunk_name; + + /* This should be a binary subdivision search or a hash for + * matching the chunk name rather than a linear search. + */ + if (chunk_name == png_IDAT) + if (png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; + + if (chunk_name == png_IHDR) + png_handle_IHDR(png_ptr, info_ptr, length); + + else if (chunk_name == png_IEND) + png_handle_IEND(png_ptr, info_ptr, length); + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + else if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_AS_DEFAULT) + { + if (chunk_name == png_IDAT) + png_ptr->mode |= PNG_HAVE_IDAT; + + png_handle_unknown(png_ptr, info_ptr, length); + + if (chunk_name == png_PLTE) + png_ptr->mode |= PNG_HAVE_PLTE; + + else if (chunk_name == png_IDAT) + { + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + + break; + } + } +#endif + else if (chunk_name == png_PLTE) + png_handle_PLTE(png_ptr, info_ptr, length); + + else if (chunk_name == png_IDAT) + { + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before IDAT"); + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + + png_ptr->idat_size = length; + png_ptr->mode |= PNG_HAVE_IDAT; + break; + } + +#ifdef PNG_READ_bKGD_SUPPORTED + else if (chunk_name == png_bKGD) + png_handle_bKGD(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_cHRM_SUPPORTED + else if (chunk_name == png_cHRM) + png_handle_cHRM(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_gAMA_SUPPORTED + else if (chunk_name == png_gAMA) + png_handle_gAMA(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_hIST_SUPPORTED + else if (chunk_name == png_hIST) + png_handle_hIST(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_oFFs_SUPPORTED + else if (chunk_name == png_oFFs) + png_handle_oFFs(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED + else if (chunk_name == png_pCAL) + png_handle_pCAL(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sCAL_SUPPORTED + else if (chunk_name == png_sCAL) + png_handle_sCAL(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_pHYs_SUPPORTED + else if (chunk_name == png_pHYs) + png_handle_pHYs(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sBIT_SUPPORTED + else if (chunk_name == png_sBIT) + png_handle_sBIT(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sRGB_SUPPORTED + else if (chunk_name == png_sRGB) + png_handle_sRGB(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_iCCP_SUPPORTED + else if (chunk_name == png_iCCP) + png_handle_iCCP(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sPLT_SUPPORTED + else if (chunk_name == png_sPLT) + png_handle_sPLT(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tEXt_SUPPORTED + else if (chunk_name == png_tEXt) + png_handle_tEXt(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tIME_SUPPORTED + else if (chunk_name == png_tIME) + png_handle_tIME(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tRNS_SUPPORTED + else if (chunk_name == png_tRNS) + png_handle_tRNS(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED + else if (chunk_name == png_zTXt) + png_handle_zTXt(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_iTXt_SUPPORTED + else if (chunk_name == png_iTXt) + png_handle_iTXt(png_ptr, info_ptr, length); +#endif + + else + png_handle_unknown(png_ptr, info_ptr, length); + } +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +/* Optional call to update the users info_ptr structure */ +void PNGAPI +png_read_update_info(png_structp png_ptr, png_infop info_ptr) +{ + png_debug(1, "in png_read_update_info"); + + if (png_ptr == NULL) + return; + + png_read_start_row(png_ptr); + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + png_read_transform_info(png_ptr, info_ptr); +#else + PNG_UNUSED(info_ptr) +#endif +} + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Initialize palette, background, etc, after transformations + * are set, but before any reading takes place. This allows + * the user to obtain a gamma-corrected palette, for example. + * If the user doesn't call this, we will do it ourselves. + */ +void PNGAPI +png_start_read_image(png_structp png_ptr) +{ + png_debug(1, "in png_start_read_image"); + + if (png_ptr != NULL) + png_read_start_row(png_ptr); +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +void PNGAPI +png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) +{ + int ret; + + png_row_info row_info; + + if (png_ptr == NULL) + return; + + png_debug2(1, "in png_read_row (row %lu, pass %d)", + (unsigned long)png_ptr->row_number, png_ptr->pass); + + /* png_read_start_row sets the information (in particular iwidth) for this + * interlace pass. + */ + if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) + png_read_start_row(png_ptr); + + /* 1.5.6: row_info moved out of png_struct to a local here. */ + row_info.width = png_ptr->iwidth; /* NOTE: width of current interlaced row */ + row_info.color_type = png_ptr->color_type; + row_info.bit_depth = png_ptr->bit_depth; + row_info.channels = png_ptr->channels; + row_info.pixel_depth = png_ptr->pixel_depth; + row_info.rowbytes = PNG_ROWBYTES(row_info.pixel_depth, row_info.width); + + if (png_ptr->row_number == 0 && png_ptr->pass == 0) + { + /* Check for transforms that have been set but were defined out */ +#if defined(PNG_WRITE_INVERT_SUPPORTED) && !defined(PNG_READ_INVERT_SUPPORTED) + if (png_ptr->transformations & PNG_INVERT_MONO) + png_warning(png_ptr, "PNG_READ_INVERT_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_FILLER_SUPPORTED) && !defined(PNG_READ_FILLER_SUPPORTED) + if (png_ptr->transformations & PNG_FILLER) + png_warning(png_ptr, "PNG_READ_FILLER_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_PACKSWAP_SUPPORTED) && \ + !defined(PNG_READ_PACKSWAP_SUPPORTED) + if (png_ptr->transformations & PNG_PACKSWAP) + png_warning(png_ptr, "PNG_READ_PACKSWAP_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_PACK_SUPPORTED) && !defined(PNG_READ_PACK_SUPPORTED) + if (png_ptr->transformations & PNG_PACK) + png_warning(png_ptr, "PNG_READ_PACK_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_SHIFT_SUPPORTED) && !defined(PNG_READ_SHIFT_SUPPORTED) + if (png_ptr->transformations & PNG_SHIFT) + png_warning(png_ptr, "PNG_READ_SHIFT_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_BGR_SUPPORTED) && !defined(PNG_READ_BGR_SUPPORTED) + if (png_ptr->transformations & PNG_BGR) + png_warning(png_ptr, "PNG_READ_BGR_SUPPORTED is not defined"); +#endif + +#if defined(PNG_WRITE_SWAP_SUPPORTED) && !defined(PNG_READ_SWAP_SUPPORTED) + if (png_ptr->transformations & PNG_SWAP_BYTES) + png_warning(png_ptr, "PNG_READ_SWAP_SUPPORTED is not defined"); +#endif + } + +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* If interlaced and we do not need a new row, combine row and return. + * Notice that the pixels we have from previous rows have been transformed + * already; we can only combine like with like (transformed or + * untransformed) and, because of the libpng API for interlaced images, this + * means we must transform before de-interlacing. + */ + if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) + { + switch (png_ptr->pass) + { + case 0: + if (png_ptr->row_number & 0x07) + { + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + png_read_finish_row(png_ptr); + return; + } + break; + + case 1: + if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) + { + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + png_read_finish_row(png_ptr); + return; + } + break; + + case 2: + if ((png_ptr->row_number & 0x07) != 4) + { + if (dsp_row != NULL && (png_ptr->row_number & 4)) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + png_read_finish_row(png_ptr); + return; + } + break; + + case 3: + if ((png_ptr->row_number & 3) || png_ptr->width < 3) + { + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + png_read_finish_row(png_ptr); + return; + } + break; + + case 4: + if ((png_ptr->row_number & 3) != 2) + { + if (dsp_row != NULL && (png_ptr->row_number & 2)) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + png_read_finish_row(png_ptr); + return; + } + break; + case 5: + if ((png_ptr->row_number & 1) || png_ptr->width < 2) + { + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + png_read_finish_row(png_ptr); + return; + } + break; + + default: + case 6: + if (!(png_ptr->row_number & 1)) + { + png_read_finish_row(png_ptr); + return; + } + break; + } + } +#endif + + if (!(png_ptr->mode & PNG_HAVE_IDAT)) + png_error(png_ptr, "Invalid attempt to read row data"); + + png_ptr->zstream.next_out = png_ptr->row_buf; + png_ptr->zstream.avail_out = + (uInt)(PNG_ROWBYTES(png_ptr->pixel_depth, + png_ptr->iwidth) + 1); + + do + { + if (!(png_ptr->zstream.avail_in)) + { + while (!png_ptr->idat_size) + { + png_crc_finish(png_ptr, 0); + + png_ptr->idat_size = png_read_chunk_header(png_ptr); + if (png_ptr->chunk_name != png_IDAT) + png_error(png_ptr, "Not enough image data"); + } + png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.next_in = png_ptr->zbuf; + if (png_ptr->zbuf_size > png_ptr->idat_size) + png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; + png_crc_read(png_ptr, png_ptr->zbuf, + (png_size_t)png_ptr->zstream.avail_in); + png_ptr->idat_size -= png_ptr->zstream.avail_in; + } + + ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); + + if (ret == Z_STREAM_END) + { + if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in || + png_ptr->idat_size) + png_benign_error(png_ptr, "Extra compressed data"); + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + break; + } + + if (ret != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : + "Decompression error"); + + } while (png_ptr->zstream.avail_out); + + if (png_ptr->row_buf[0] > PNG_FILTER_VALUE_NONE) + { + if (png_ptr->row_buf[0] < PNG_FILTER_VALUE_LAST) + png_read_filter_row(png_ptr, &row_info, png_ptr->row_buf + 1, + png_ptr->prev_row + 1, png_ptr->row_buf[0]); + else + png_error(png_ptr, "bad adaptive filter value"); + } + + /* libpng 1.5.6: the following line was copying png_ptr->rowbytes before + * 1.5.6, while the buffer really is this big in current versions of libpng + * it may not be in the future, so this was changed just to copy the + * interlaced count: + */ + png_memcpy(png_ptr->prev_row, png_ptr->row_buf, row_info.rowbytes + 1); + +#ifdef PNG_MNG_FEATURES_SUPPORTED + if ((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && + (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) + { + /* Intrapixel differencing */ + png_do_read_intrapixel(&row_info, png_ptr->row_buf + 1); + } +#endif + + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + if (png_ptr->transformations) + png_do_read_transformations(png_ptr, &row_info); +#endif + + /* The transformed pixel depth should match the depth now in row_info. */ + if (png_ptr->transformed_pixel_depth == 0) + { + png_ptr->transformed_pixel_depth = row_info.pixel_depth; + if (row_info.pixel_depth > png_ptr->maximum_pixel_depth) + png_error(png_ptr, "sequential row overflow"); + } + + else if (png_ptr->transformed_pixel_depth != row_info.pixel_depth) + png_error(png_ptr, "internal sequential row size calculation error"); + +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* Blow up interlaced rows to full size */ + if (png_ptr->interlaced && + (png_ptr->transformations & PNG_INTERLACE)) + { + if (png_ptr->pass < 6) + png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass, + png_ptr->transformations); + + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, 1/*display*/); + + if (row != NULL) + png_combine_row(png_ptr, row, 0/*row*/); + } + + else +#endif + { + if (row != NULL) + png_combine_row(png_ptr, row, -1/*ignored*/); + + if (dsp_row != NULL) + png_combine_row(png_ptr, dsp_row, -1/*ignored*/); + } + png_read_finish_row(png_ptr); + + if (png_ptr->read_row_fn != NULL) + (*(png_ptr->read_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read one or more rows of image data. If the image is interlaced, + * and png_set_interlace_handling() has been called, the rows need to + * contain the contents of the rows from the previous pass. If the + * image has alpha or transparency, and png_handle_alpha()[*] has been + * called, the rows contents must be initialized to the contents of the + * screen. + * + * "row" holds the actual image, and pixels are placed in it + * as they arrive. If the image is displayed after each pass, it will + * appear to "sparkle" in. "display_row" can be used to display a + * "chunky" progressive image, with finer detail added as it becomes + * available. If you do not want this "chunky" display, you may pass + * NULL for display_row. If you do not want the sparkle display, and + * you have not called png_handle_alpha(), you may pass NULL for rows. + * If you have called png_handle_alpha(), and the image has either an + * alpha channel or a transparency chunk, you must provide a buffer for + * rows. In this case, you do not have to provide a display_row buffer + * also, but you may. If the image is not interlaced, or if you have + * not called png_set_interlace_handling(), the display_row buffer will + * be ignored, so pass NULL to it. + * + * [*] png_handle_alpha() does not exist yet, as of this version of libpng + */ + +void PNGAPI +png_read_rows(png_structp png_ptr, png_bytepp row, + png_bytepp display_row, png_uint_32 num_rows) +{ + png_uint_32 i; + png_bytepp rp; + png_bytepp dp; + + png_debug(1, "in png_read_rows"); + + if (png_ptr == NULL) + return; + + rp = row; + dp = display_row; + if (rp != NULL && dp != NULL) + for (i = 0; i < num_rows; i++) + { + png_bytep rptr = *rp++; + png_bytep dptr = *dp++; + + png_read_row(png_ptr, rptr, dptr); + } + + else if (rp != NULL) + for (i = 0; i < num_rows; i++) + { + png_bytep rptr = *rp; + png_read_row(png_ptr, rptr, NULL); + rp++; + } + + else if (dp != NULL) + for (i = 0; i < num_rows; i++) + { + png_bytep dptr = *dp; + png_read_row(png_ptr, NULL, dptr); + dp++; + } +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the entire image. If the image has an alpha channel or a tRNS + * chunk, and you have called png_handle_alpha()[*], you will need to + * initialize the image to the current image that PNG will be overlaying. + * We set the num_rows again here, in case it was incorrectly set in + * png_read_start_row() by a call to png_read_update_info() or + * png_start_read_image() if png_set_interlace_handling() wasn't called + * prior to either of these functions like it should have been. You can + * only call this function once. If you desire to have an image for + * each pass of a interlaced image, use png_read_rows() instead. + * + * [*] png_handle_alpha() does not exist yet, as of this version of libpng + */ +void PNGAPI +png_read_image(png_structp png_ptr, png_bytepp image) +{ + png_uint_32 i, image_height; + int pass, j; + png_bytepp rp; + + png_debug(1, "in png_read_image"); + + if (png_ptr == NULL) + return; + +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (!(png_ptr->flags & PNG_FLAG_ROW_INIT)) + { + pass = png_set_interlace_handling(png_ptr); + /* And make sure transforms are initialized. */ + png_start_read_image(png_ptr); + } + else + { + if (png_ptr->interlaced && !(png_ptr->transformations & PNG_INTERLACE)) + { + /* Caller called png_start_read_image or png_read_update_info without + * first turning on the PNG_INTERLACE transform. We can fix this here, + * but the caller should do it! + */ + png_warning(png_ptr, "Interlace handling should be turned on when " + "using png_read_image"); + /* Make sure this is set correctly */ + png_ptr->num_rows = png_ptr->height; + } + + /* Obtain the pass number, which also turns on the PNG_INTERLACE flag in + * the above error case. + */ + pass = png_set_interlace_handling(png_ptr); + } +#else + if (png_ptr->interlaced) + png_error(png_ptr, + "Cannot read interlaced image -- interlace handler disabled"); + + pass = 1; +#endif + + image_height=png_ptr->height; + + for (j = 0; j < pass; j++) + { + rp = image; + for (i = 0; i < image_height; i++) + { + png_read_row(png_ptr, *rp, NULL); + rp++; + } + } +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the end of the PNG file. Will not read past the end of the + * file, will verify the end is accurate, and will read any comments + * or time information at the end of the file, if info is not NULL. + */ +void PNGAPI +png_read_end(png_structp png_ptr, png_infop info_ptr) +{ + png_debug(1, "in png_read_end"); + + if (png_ptr == NULL) + return; + + png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */ + + do + { + png_uint_32 length = png_read_chunk_header(png_ptr); + png_uint_32 chunk_name = png_ptr->chunk_name; + + if (chunk_name == png_IHDR) + png_handle_IHDR(png_ptr, info_ptr, length); + + else if (chunk_name == png_IEND) + png_handle_IEND(png_ptr, info_ptr, length); + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + else if (png_chunk_unknown_handling(png_ptr, chunk_name) != + PNG_HANDLE_CHUNK_AS_DEFAULT) + { + if (chunk_name == png_IDAT) + { + if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) + png_benign_error(png_ptr, "Too many IDATs found"); + } + png_handle_unknown(png_ptr, info_ptr, length); + if (chunk_name == png_PLTE) + png_ptr->mode |= PNG_HAVE_PLTE; + } +#endif + + else if (chunk_name == png_IDAT) + { + /* Zero length IDATs are legal after the last IDAT has been + * read, but not after other chunks have been read. + */ + if ((length > 0) || (png_ptr->mode & PNG_HAVE_CHUNK_AFTER_IDAT)) + png_benign_error(png_ptr, "Too many IDATs found"); + + png_crc_finish(png_ptr, length); + } + else if (chunk_name == png_PLTE) + png_handle_PLTE(png_ptr, info_ptr, length); + +#ifdef PNG_READ_bKGD_SUPPORTED + else if (chunk_name == png_bKGD) + png_handle_bKGD(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_cHRM_SUPPORTED + else if (chunk_name == png_cHRM) + png_handle_cHRM(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_gAMA_SUPPORTED + else if (chunk_name == png_gAMA) + png_handle_gAMA(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_hIST_SUPPORTED + else if (chunk_name == png_hIST) + png_handle_hIST(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_oFFs_SUPPORTED + else if (chunk_name == png_oFFs) + png_handle_oFFs(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED + else if (chunk_name == png_pCAL) + png_handle_pCAL(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sCAL_SUPPORTED + else if (chunk_name == png_sCAL) + png_handle_sCAL(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_pHYs_SUPPORTED + else if (chunk_name == png_pHYs) + png_handle_pHYs(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sBIT_SUPPORTED + else if (chunk_name == png_sBIT) + png_handle_sBIT(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sRGB_SUPPORTED + else if (chunk_name == png_sRGB) + png_handle_sRGB(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_iCCP_SUPPORTED + else if (chunk_name == png_iCCP) + png_handle_iCCP(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_sPLT_SUPPORTED + else if (chunk_name == png_sPLT) + png_handle_sPLT(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tEXt_SUPPORTED + else if (chunk_name == png_tEXt) + png_handle_tEXt(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tIME_SUPPORTED + else if (chunk_name == png_tIME) + png_handle_tIME(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_tRNS_SUPPORTED + else if (chunk_name == png_tRNS) + png_handle_tRNS(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED + else if (chunk_name == png_zTXt) + png_handle_zTXt(png_ptr, info_ptr, length); +#endif + +#ifdef PNG_READ_iTXt_SUPPORTED + else if (chunk_name == png_iTXt) + png_handle_iTXt(png_ptr, info_ptr, length); +#endif + + else + png_handle_unknown(png_ptr, info_ptr, length); + } while (!(png_ptr->mode & PNG_HAVE_IEND)); +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +/* Free all memory used by the read */ +void PNGAPI +png_destroy_read_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, + png_infopp end_info_ptr_ptr) +{ + png_structp png_ptr = NULL; + png_infop info_ptr = NULL, end_info_ptr = NULL; +#ifdef PNG_USER_MEM_SUPPORTED + png_free_ptr free_fn = NULL; + png_voidp mem_ptr = NULL; +#endif + + png_debug(1, "in png_destroy_read_struct"); + + if (png_ptr_ptr != NULL) + png_ptr = *png_ptr_ptr; + if (png_ptr == NULL) + return; + +#ifdef PNG_USER_MEM_SUPPORTED + free_fn = png_ptr->free_fn; + mem_ptr = png_ptr->mem_ptr; +#endif + + if (info_ptr_ptr != NULL) + info_ptr = *info_ptr_ptr; + + if (end_info_ptr_ptr != NULL) + end_info_ptr = *end_info_ptr_ptr; + + png_read_destroy(png_ptr, info_ptr, end_info_ptr); + + if (info_ptr != NULL) + { +#ifdef PNG_TEXT_SUPPORTED + png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, -1); +#endif + +#ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, + (png_voidp)mem_ptr); +#else + png_destroy_struct((png_voidp)info_ptr); +#endif + *info_ptr_ptr = NULL; + } + + if (end_info_ptr != NULL) + { +#ifdef PNG_READ_TEXT_SUPPORTED + png_free_data(png_ptr, end_info_ptr, PNG_FREE_TEXT, -1); +#endif +#ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2((png_voidp)end_info_ptr, (png_free_ptr)free_fn, + (png_voidp)mem_ptr); +#else + png_destroy_struct((png_voidp)end_info_ptr); +#endif + *end_info_ptr_ptr = NULL; + } + + if (png_ptr != NULL) + { +#ifdef PNG_USER_MEM_SUPPORTED + png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, + (png_voidp)mem_ptr); +#else + png_destroy_struct((png_voidp)png_ptr); +#endif + *png_ptr_ptr = NULL; + } +} + +/* Free all memory used by the read (old method) */ +void /* PRIVATE */ +png_read_destroy(png_structp png_ptr, png_infop info_ptr, + png_infop end_info_ptr) +{ +#ifdef PNG_SETJMP_SUPPORTED + jmp_buf tmp_jmp; +#endif + png_error_ptr error_fn; +#ifdef PNG_WARNINGS_SUPPORTED + png_error_ptr warning_fn; +#endif + png_voidp error_ptr; +#ifdef PNG_USER_MEM_SUPPORTED + png_free_ptr free_fn; +#endif + + png_debug(1, "in png_read_destroy"); + + if (info_ptr != NULL) + png_info_destroy(png_ptr, info_ptr); + + if (end_info_ptr != NULL) + png_info_destroy(png_ptr, end_info_ptr); + +#ifdef PNG_READ_GAMMA_SUPPORTED + png_destroy_gamma_table(png_ptr); +#endif + + png_free(png_ptr, png_ptr->zbuf); + png_free(png_ptr, png_ptr->big_row_buf); + png_free(png_ptr, png_ptr->big_prev_row); + png_free(png_ptr, png_ptr->chunkdata); + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + png_free(png_ptr, png_ptr->palette_lookup); + png_free(png_ptr, png_ptr->quantize_index); +#endif + + if (png_ptr->free_me & PNG_FREE_PLTE) + png_zfree(png_ptr, png_ptr->palette); + png_ptr->free_me &= ~PNG_FREE_PLTE; + +#if defined(PNG_tRNS_SUPPORTED) || \ + defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + if (png_ptr->free_me & PNG_FREE_TRNS) + png_free(png_ptr, png_ptr->trans_alpha); + png_ptr->free_me &= ~PNG_FREE_TRNS; +#endif + +#ifdef PNG_READ_hIST_SUPPORTED + if (png_ptr->free_me & PNG_FREE_HIST) + png_free(png_ptr, png_ptr->hist); + png_ptr->free_me &= ~PNG_FREE_HIST; +#endif + + inflateEnd(&png_ptr->zstream); + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + png_free(png_ptr, png_ptr->save_buffer); +#endif + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +#ifdef PNG_TEXT_SUPPORTED + png_free(png_ptr, png_ptr->current_text); +#endif /* PNG_TEXT_SUPPORTED */ +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + + /* Save the important info out of the png_struct, in case it is + * being used again. + */ +#ifdef PNG_SETJMP_SUPPORTED + png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf)); +#endif + + error_fn = png_ptr->error_fn; +#ifdef PNG_WARNINGS_SUPPORTED + warning_fn = png_ptr->warning_fn; +#endif + error_ptr = png_ptr->error_ptr; +#ifdef PNG_USER_MEM_SUPPORTED + free_fn = png_ptr->free_fn; +#endif + + png_memset(png_ptr, 0, png_sizeof(png_struct)); + + png_ptr->error_fn = error_fn; +#ifdef PNG_WARNINGS_SUPPORTED + png_ptr->warning_fn = warning_fn; +#endif + png_ptr->error_ptr = error_ptr; +#ifdef PNG_USER_MEM_SUPPORTED + png_ptr->free_fn = free_fn; +#endif + +#ifdef PNG_SETJMP_SUPPORTED + png_memcpy(png_ptr->longjmp_buffer, tmp_jmp, png_sizeof(jmp_buf)); +#endif + +} + +void PNGAPI +png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn) +{ + if (png_ptr == NULL) + return; + + png_ptr->read_row_fn = read_row_fn; +} + + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +#ifdef PNG_INFO_IMAGE_SUPPORTED +void PNGAPI +png_read_png(png_structp png_ptr, png_infop info_ptr, + int transforms, + voidp params) +{ + int row; + + if (png_ptr == NULL || info_ptr == NULL) + return; + + /* png_read_info() gives us all of the information from the + * PNG file before the first IDAT (image data chunk). + */ + png_read_info(png_ptr, info_ptr); + if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep)) + png_error(png_ptr, "Image is too high to process with png_read_png()"); + + /* -------------- image transformations start here ------------------- */ + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + /* Tell libpng to strip 16-bit/color files down to 8 bits per color. + */ + if (transforms & PNG_TRANSFORM_SCALE_16) + { + /* Added at libpng-1.5.4. "strip_16" produces the same result that it + * did in earlier versions, while "scale_16" is now more accurate. + */ + png_set_scale_16(png_ptr); + } +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* If both SCALE and STRIP are required pngrtran will effectively cancel the + * latter by doing SCALE first. This is ok and allows apps not to check for + * which is supported to get the right answer. + */ + if (transforms & PNG_TRANSFORM_STRIP_16) + png_set_strip_16(png_ptr); +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + /* Strip alpha bytes from the input data without combining with + * the background (not recommended). + */ + if (transforms & PNG_TRANSFORM_STRIP_ALPHA) + png_set_strip_alpha(png_ptr); +#endif + +#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED) + /* Extract multiple pixels with bit depths of 1, 2, or 4 from a single + * byte into separate bytes (useful for paletted and grayscale images). + */ + if (transforms & PNG_TRANSFORM_PACKING) + png_set_packing(png_ptr); +#endif + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + /* Change the order of packed pixels to least significant bit first + * (not useful if you are using png_set_packing). + */ + if (transforms & PNG_TRANSFORM_PACKSWAP) + png_set_packswap(png_ptr); +#endif + +#ifdef PNG_READ_EXPAND_SUPPORTED + /* Expand paletted colors into true RGB triplets + * Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel + * Expand paletted or RGB images with transparency to full alpha + * channels so the data will be available as RGBA quartets. + */ + if (transforms & PNG_TRANSFORM_EXPAND) + if ((png_ptr->bit_depth < 8) || + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) || + (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) + png_set_expand(png_ptr); +#endif + + /* We don't handle background color or gamma transformation or quantizing. + */ + +#ifdef PNG_READ_INVERT_SUPPORTED + /* Invert monochrome files to have 0 as white and 1 as black + */ + if (transforms & PNG_TRANSFORM_INVERT_MONO) + png_set_invert_mono(png_ptr); +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED + /* If you want to shift the pixel values from the range [0,255] or + * [0,65535] to the original [0,7] or [0,31], or whatever range the + * colors were originally in: + */ + if ((transforms & PNG_TRANSFORM_SHIFT) + && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT)) + { + png_color_8p sig_bit; + + png_get_sBIT(png_ptr, info_ptr, &sig_bit); + png_set_shift(png_ptr, sig_bit); + } +#endif + +#ifdef PNG_READ_BGR_SUPPORTED + /* Flip the RGB pixels to BGR (or RGBA to BGRA) */ + if (transforms & PNG_TRANSFORM_BGR) + png_set_bgr(png_ptr); +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED + /* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */ + if (transforms & PNG_TRANSFORM_SWAP_ALPHA) + png_set_swap_alpha(png_ptr); +#endif + +#ifdef PNG_READ_SWAP_SUPPORTED + /* Swap bytes of 16-bit files to least significant byte first */ + if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) + png_set_swap(png_ptr); +#endif + +/* Added at libpng-1.2.41 */ +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + /* Invert the alpha channel from opacity to transparency */ + if (transforms & PNG_TRANSFORM_INVERT_ALPHA) + png_set_invert_alpha(png_ptr); +#endif + +/* Added at libpng-1.2.41 */ +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* Expand grayscale image to RGB */ + if (transforms & PNG_TRANSFORM_GRAY_TO_RGB) + png_set_gray_to_rgb(png_ptr); +#endif + +/* Added at libpng-1.5.4 */ +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (transforms & PNG_TRANSFORM_EXPAND_16) + png_set_expand_16(png_ptr); +#endif + + /* We don't handle adding filler bytes */ + + /* We use png_read_image and rely on that for interlace handling, but we also + * call png_read_update_info therefore must turn on interlace handling now: + */ + (void)png_set_interlace_handling(png_ptr); + + /* Optional call to gamma correct and add the background to the palette + * and update info structure. REQUIRED if you are expecting libpng to + * update the palette for you (i.e., you selected such a transform above). + */ + png_read_update_info(png_ptr, info_ptr); + + /* -------------- image transformations end here ------------------- */ + + png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); + if (info_ptr->row_pointers == NULL) + { + png_uint_32 iptr; + + info_ptr->row_pointers = (png_bytepp)png_malloc(png_ptr, + info_ptr->height * png_sizeof(png_bytep)); + for (iptr=0; iptrheight; iptr++) + info_ptr->row_pointers[iptr] = NULL; + + info_ptr->free_me |= PNG_FREE_ROWS; + + for (row = 0; row < (int)info_ptr->height; row++) + info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr, + png_get_rowbytes(png_ptr, info_ptr)); + } + + png_read_image(png_ptr, info_ptr->row_pointers); + info_ptr->valid |= PNG_INFO_IDAT; + + /* Read rest of file, and get additional chunks in info_ptr - REQUIRED */ + png_read_end(png_ptr, info_ptr); + + PNG_UNUSED(transforms) /* Quiet compiler warnings */ + PNG_UNUSED(params) + +} +#endif /* PNG_INFO_IMAGE_SUPPORTED */ +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngrio.c b/ExternalLibs/glpng/png/pngrio.c index 8004cc0..d0d9d8a 100644 --- a/ExternalLibs/glpng/png/pngrio.c +++ b/ExternalLibs/glpng/png/pngrio.c @@ -1,152 +1,176 @@ - -/* pngrio.c - functions for data input - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file provides a location for all input. Users who need - * special handling are expected to write a function that has the same - * arguments as this and performs a similar function, but that possibly - * has a different input method. Note that you shouldn't change this - * function, but rather write a replacement function and then make - * libpng use it at run time with png_set_read_fn(...). - */ - -#define PNG_INTERNAL -#include "png.h" - -/* Read the data from whatever input you are using. The default routine - reads from a file pointer. Note that this routine sometimes gets called - with very small lengths, so you should implement some kind of simple - buffering if you are using unbuffered reads. This should never be asked - to read more then 64K on a 16 bit machine. */ -void -png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_debug1(4,"reading %d bytes\n", length); - if (png_ptr->read_data_fn != NULL) - (*(png_ptr->read_data_fn))(png_ptr, data, length); - else - png_error(png_ptr, "Call to NULL read function"); -} - -#if !defined(PNG_NO_STDIO) -/* This is the function that does the actual reading of data. If you are - not reading from a standard C stream, you should create a replacement - read_data function and use it at run time with png_set_read_fn(), rather - than changing the library. */ -#ifndef USE_FAR_KEYWORD -static void -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - png_size_t check; - - /* fread() returns 0 on error, so it is OK to store this in a png_size_t - * instead of an int, which is what fread() actually returns. - */ - check = (png_size_t)fread(data, (png_size_t)1, length, - (FILE *)png_ptr->io_ptr); - - if (check != length) - { - png_error(png_ptr, "Read Error"); - } -} -#else -/* this is the model-independent version. Since the standard I/O library - can't handle far buffers in the medium and small models, we have to copy - the data. -*/ - -#define NEAR_BUF_SIZE 1024 -#define MIN(a,b) (a <= b ? a : b) - -static void -png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) -{ - int check; - png_byte *n_data; - FILE *io_ptr; - - /* Check if data really is near. If so, use usual code. */ - n_data = (png_byte *)CVT_PTR_NOCHECK(data); - io_ptr = (FILE *)CVT_PTR(png_ptr->io_ptr); - if ((png_bytep)n_data == data) - { - check = fread(n_data, 1, length, io_ptr); - } - else - { - png_byte buf[NEAR_BUF_SIZE]; - png_size_t read, remaining, err; - check = 0; - remaining = length; - do - { - read = MIN(NEAR_BUF_SIZE, remaining); - err = fread(buf, (png_size_t)1, read, io_ptr); - png_memcpy(data, buf, read); /* copy far buffer to near buffer */ - if(err != read) - break; - else - check += err; - data += read; - remaining -= read; - } - while (remaining != 0); - } - if ((png_uint_32)check != (png_uint_32)length) - { - png_error(png_ptr, "read Error"); - } -} -#endif -#endif - -/* This function allows the application to supply a new input function - for libpng if standard C streams aren't being used. - - This function takes as its arguments: - png_ptr - pointer to a png input data structure - io_ptr - pointer to user supplied structure containing info about - the input functions. May be NULL. - read_data_fn - pointer to a new input function that takes as its - arguments a pointer to a png_struct, a pointer to - a location where input data can be stored, and a 32-bit - unsigned int that is the number of bytes to be read. - To exit and output any fatal error messages the new write - function should call png_error(png_ptr, "Error msg"). */ -void -png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, - png_rw_ptr read_data_fn) -{ - png_ptr->io_ptr = io_ptr; - -#if !defined(PNG_NO_STDIO) - if (read_data_fn != NULL) - png_ptr->read_data_fn = read_data_fn; - else - png_ptr->read_data_fn = png_default_read_data; -#else - png_ptr->read_data_fn = read_data_fn; -#endif - - /* It is an error to write to a read device */ - if (png_ptr->write_data_fn != NULL) - { - png_ptr->write_data_fn = NULL; - png_warning(png_ptr, - "It's an error to set both read_data_fn and write_data_fn in the "); - png_warning(png_ptr, - "same structure. Resetting write_data_fn to NULL."); - } - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_ptr->output_flush_fn = NULL; -#endif /* PNG_WRITE_FLUSH_SUPPORTED */ -} - - + +/* pngrio.c - functions for data input + * + * Last changed in libpng 1.5.0 [January 6, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file provides a location for all input. Users who need + * special handling are expected to write a function that has the same + * arguments as this and performs a similar function, but that possibly + * has a different input method. Note that you shouldn't change this + * function, but rather write a replacement function and then make + * libpng use it at run time with png_set_read_fn(...). + */ + +#include "pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +/* Read the data from whatever input you are using. The default routine + * reads from a file pointer. Note that this routine sometimes gets called + * with very small lengths, so you should implement some kind of simple + * buffering if you are using unbuffered reads. This should never be asked + * to read more then 64K on a 16 bit machine. + */ +void /* PRIVATE */ +png_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +{ + png_debug1(4, "reading %d bytes", (int)length); + + if (png_ptr->read_data_fn != NULL) + (*(png_ptr->read_data_fn))(png_ptr, data, length); + + else + png_error(png_ptr, "Call to NULL read function"); +} + +#ifdef PNG_STDIO_SUPPORTED +/* This is the function that does the actual reading of data. If you are + * not reading from a standard C stream, you should create a replacement + * read_data function and use it at run time with png_set_read_fn(), rather + * than changing the library. + */ +# ifndef USE_FAR_KEYWORD +void PNGCBAPI +png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +{ + png_size_t check; + + if (png_ptr == NULL) + return; + + /* fread() returns 0 on error, so it is OK to store this in a png_size_t + * instead of an int, which is what fread() actually returns. + */ + check = fread(data, 1, length, (png_FILE_p)png_ptr->io_ptr); + + if (check != length) + png_error(png_ptr, "Read Error"); +} +# else +/* This is the model-independent version. Since the standard I/O library + can't handle far buffers in the medium and small models, we have to copy + the data. +*/ + +#define NEAR_BUF_SIZE 1024 +#define MIN(a,b) (a <= b ? a : b) + +static void PNGCBAPI +png_default_read_data(png_structp png_ptr, png_bytep data, png_size_t length) +{ + png_size_t check; + png_byte *n_data; + png_FILE_p io_ptr; + + if (png_ptr == NULL) + return; + + /* Check if data really is near. If so, use usual code. */ + n_data = (png_byte *)CVT_PTR_NOCHECK(data); + io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr); + + if ((png_bytep)n_data == data) + { + check = fread(n_data, 1, length, io_ptr); + } + + else + { + png_byte buf[NEAR_BUF_SIZE]; + png_size_t read, remaining, err; + check = 0; + remaining = length; + + do + { + read = MIN(NEAR_BUF_SIZE, remaining); + err = fread(buf, 1, read, io_ptr); + png_memcpy(data, buf, read); /* copy far buffer to near buffer */ + + if (err != read) + break; + + else + check += err; + + data += read; + remaining -= read; + } + while (remaining != 0); + } + + if ((png_uint_32)check != (png_uint_32)length) + png_error(png_ptr, "read Error"); +} +# endif +#endif + +/* This function allows the application to supply a new input function + * for libpng if standard C streams aren't being used. + * + * This function takes as its arguments: + * + * png_ptr - pointer to a png input data structure + * + * io_ptr - pointer to user supplied structure containing info about + * the input functions. May be NULL. + * + * read_data_fn - pointer to a new input function that takes as its + * arguments a pointer to a png_struct, a pointer to + * a location where input data can be stored, and a 32-bit + * unsigned int that is the number of bytes to be read. + * To exit and output any fatal error messages the new write + * function should call png_error(png_ptr, "Error msg"). + * May be NULL, in which case libpng's default function will + * be used. + */ +void PNGAPI +png_set_read_fn(png_structp png_ptr, png_voidp io_ptr, + png_rw_ptr read_data_fn) +{ + if (png_ptr == NULL) + return; + + png_ptr->io_ptr = io_ptr; + +#ifdef PNG_STDIO_SUPPORTED + if (read_data_fn != NULL) + png_ptr->read_data_fn = read_data_fn; + + else + png_ptr->read_data_fn = png_default_read_data; +#else + png_ptr->read_data_fn = read_data_fn; +#endif + + /* It is an error to write to a read device */ + if (png_ptr->write_data_fn != NULL) + { + png_ptr->write_data_fn = NULL; + png_warning(png_ptr, + "Can't set both read_data_fn and write_data_fn in the" + " same structure"); + } + +#ifdef PNG_WRITE_FLUSH_SUPPORTED + png_ptr->output_flush_fn = NULL; +#endif +} +#endif /* PNG_READ_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngrtran.c b/ExternalLibs/glpng/png/pngrtran.c index 1c31e2f..26083a0 100644 --- a/ExternalLibs/glpng/png/pngrtran.c +++ b/ExternalLibs/glpng/png/pngrtran.c @@ -1,3539 +1,5023 @@ - -/* pngrtran.c - transforms the data in a row for PNG readers - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file contains functions optionally called by an application - * in order to tell libpng how to handle data when reading a PNG. - * Transformations that are used in both reading and writing are - * in pngtrans.c. - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -/* handle alpha and tRNS via a background color */ -void -png_set_background(png_structp png_ptr, - png_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma) -{ - png_debug(1, "in png_set_background\n"); - if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) - { - png_warning(png_ptr, "Application must supply a known background gamma"); - return; - } - - png_ptr->transformations |= PNG_BACKGROUND; - png_memcpy(&(png_ptr->background), background_color, sizeof(png_color_16)); - png_ptr->background_gamma = (float)background_gamma; - png_ptr->background_gamma_type = (png_byte)(background_gamma_code); - png_ptr->transformations |= (need_expand ? PNG_BACKGROUND_EXPAND : 0); - - /* Note: if need_expand is set and color_type is either RGB or RGB_ALPHA - * (in which case need_expand is superfluous anyway), the background color - * might actually be gray yet not be flagged as such. This is not a problem - * for the current code, which uses PNG_FLAG_BACKGROUND_IS_GRAY only to - * decide when to do the png_do_gray_to_rgb() transformation. - */ - if ((need_expand && !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) || - (!need_expand && background_color->red == background_color->green && - background_color->red == background_color->blue)) - png_ptr->flags |= PNG_FLAG_BACKGROUND_IS_GRAY; -} -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* strip 16 bit depth files to 8 bit depth */ -void -png_set_strip_16(png_structp png_ptr) -{ - png_debug(1, "in png_set_strip_16\n"); - png_ptr->transformations |= PNG_16_TO_8; -} -#endif - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -void -png_set_strip_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_strip_alpha\n"); - png_ptr->transformations |= PNG_STRIP_ALPHA; -} -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -/* Dither file to 8 bit. Supply a palette, the current number - * of elements in the palette, the maximum number of elements - * allowed, and a histogram if possible. If the current number - * of colors is greater then the maximum number, the palette will be - * modified to fit in the maximum number. "full_dither" indicates - * whether we need a dithering cube set up for RGB images, or if we - * simply are reducing the number of colors in a paletted image. - */ - -typedef struct png_dsort_struct -{ - struct png_dsort_struct FAR * next; - png_byte left; - png_byte right; -} png_dsort; -typedef png_dsort FAR * png_dsortp; -typedef png_dsort FAR * FAR * png_dsortpp; - -void -png_set_dither(png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_uint_16p histogram, - int full_dither) -{ - png_debug(1, "in png_set_dither\n"); - png_ptr->transformations |= PNG_DITHER; - - if (!full_dither) - { - int i; - - png_ptr->dither_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - for (i = 0; i < num_palette; i++) - png_ptr->dither_index[i] = (png_byte)i; - } - - if (num_palette > maximum_colors) - { - if (histogram != NULL) - { - /* This is easy enough, just throw out the least used colors. - Perhaps not the best solution, but good enough. */ - - int i; - png_bytep sort; - - /* initialize an array to sort colors */ - sort = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_palette - * sizeof (png_byte))); - - /* initialize the sort array */ - for (i = 0; i < num_palette; i++) - sort[i] = (png_byte)i; - - /* Find the least used palette entries by starting a - bubble sort, and running it until we have sorted - out enough colors. Note that we don't care about - sorting all the colors, just finding which are - least used. */ - - for (i = num_palette - 1; i >= maximum_colors; i--) - { - int done; /* to stop early if the list is pre-sorted */ - int j; - - done = 1; - for (j = 0; j < i; j++) - { - if (histogram[sort[j]] < histogram[sort[j + 1]]) - { - png_byte t; - - t = sort[j]; - sort[j] = sort[j + 1]; - sort[j + 1] = t; - done = 0; - } - } - if (done) - break; - } - - /* swap the palette around, and set up a table, if necessary */ - if (full_dither) - { - int j = num_palette; - - /* put all the useful colors within the max, but don't - move the others */ - for (i = 0; i < maximum_colors; i++) - { - if ((int)sort[i] >= maximum_colors) - { - do - j--; - while ((int)sort[j] >= maximum_colors); - palette[i] = palette[j]; - } - } - } - else - { - int j = num_palette; - - /* move all the used colors inside the max limit, and - develop a translation table */ - for (i = 0; i < maximum_colors; i++) - { - /* only move the colors we need to */ - if ((int)sort[i] >= maximum_colors) - { - png_color tmp_color; - - do - j--; - while ((int)sort[j] >= maximum_colors); - - tmp_color = palette[j]; - palette[j] = palette[i]; - palette[i] = tmp_color; - /* indicate where the color went */ - png_ptr->dither_index[j] = (png_byte)i; - png_ptr->dither_index[i] = (png_byte)j; - } - } - - /* find closest color for those colors we are not using */ - for (i = 0; i < num_palette; i++) - { - if ((int)png_ptr->dither_index[i] >= maximum_colors) - { - int min_d, k, min_k, d_index; - - /* find the closest color to one we threw out */ - d_index = png_ptr->dither_index[i]; - min_d = PNG_COLOR_DIST(palette[d_index], palette[0]); - for (k = 1, min_k = 0; k < maximum_colors; k++) - { - int d; - - d = PNG_COLOR_DIST(palette[d_index], palette[k]); - - if (d < min_d) - { - min_d = d; - min_k = k; - } - } - /* point to closest color */ - png_ptr->dither_index[i] = (png_byte)min_k; - } - } - } - png_free(png_ptr, sort); - } - else - { - /* This is much harder to do simply (and quickly). Perhaps - we need to go through a median cut routine, but those - don't always behave themselves with only a few colors - as input. So we will just find the closest two colors, - and throw out one of them (chosen somewhat randomly). - [I don't understand this at all, so if someone wants to - work on improving it, be my guest - AED] - */ - int i; - int max_d; - int num_new_palette; - png_dsortpp hash; - png_bytep index_to_palette; - /* where the original index currently is in the palette */ - png_bytep palette_to_index; - /* which original index points to this palette color */ - - /* initialize palette index arrays */ - index_to_palette = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - palette_to_index = (png_bytep)png_malloc(png_ptr, - (png_uint_32)(num_palette * sizeof (png_byte))); - - /* initialize the sort array */ - for (i = 0; i < num_palette; i++) - { - index_to_palette[i] = (png_byte)i; - palette_to_index[i] = (png_byte)i; - } - - hash = (png_dsortpp)png_malloc(png_ptr, (png_uint_32)(769 * - sizeof (png_dsortp))); - for (i = 0; i < 769; i++) - hash[i] = NULL; -/* png_memset(hash, 0, 769 * sizeof (png_dsortp)); */ - - num_new_palette = num_palette; - - /* initial wild guess at how far apart the farthest pixel - pair we will be eliminating will be. Larger - numbers mean more areas will be allocated, Smaller - numbers run the risk of not saving enough data, and - having to do this all over again. - - I have not done extensive checking on this number. - */ - max_d = 96; - - while (num_new_palette > maximum_colors) - { - for (i = 0; i < num_new_palette - 1; i++) - { - int j; - - for (j = i + 1; j < num_new_palette; j++) - { - int d; - - d = PNG_COLOR_DIST(palette[i], palette[j]); - - if (d <= max_d) - { - png_dsortp t; - - t = (png_dsortp)png_malloc(png_ptr, (png_uint_32)(sizeof - (png_dsort))); - t->next = hash[d]; - t->left = (png_byte)i; - t->right = (png_byte)j; - hash[d] = t; - } - } - } - - for (i = 0; i <= max_d; i++) - { - if (hash[i] != NULL) - { - png_dsortp p; - - for (p = hash[i]; p; p = p->next) - { - if ((int)index_to_palette[p->left] < num_new_palette && - (int)index_to_palette[p->right] < num_new_palette) - { - int j, next_j; - - if (num_new_palette & 1) - { - j = p->left; - next_j = p->right; - } - else - { - j = p->right; - next_j = p->left; - } - - num_new_palette--; - palette[index_to_palette[j]] = palette[num_new_palette]; - if (!full_dither) - { - int k; - - for (k = 0; k < num_palette; k++) - { - if (png_ptr->dither_index[k] == - index_to_palette[j]) - png_ptr->dither_index[k] = - index_to_palette[next_j]; - if ((int)png_ptr->dither_index[k] == - num_new_palette) - png_ptr->dither_index[k] = - index_to_palette[j]; - } - } - - index_to_palette[palette_to_index[num_new_palette]] = - index_to_palette[j]; - palette_to_index[index_to_palette[j]] = - palette_to_index[num_new_palette]; - - index_to_palette[j] = (png_byte)num_new_palette; - palette_to_index[num_new_palette] = (png_byte)j; - } - if (num_new_palette <= maximum_colors) - break; - } - if (num_new_palette <= maximum_colors) - break; - } - } - - for (i = 0; i < 769; i++) - { - if (hash[i] != NULL) - { - png_dsortp p = hash[i]; - while (p) - { - png_dsortp t; - - t = p->next; - png_free(png_ptr, p); - p = t; - } - } - hash[i] = 0; - } - max_d += 96; - } - png_free(png_ptr, hash); - png_free(png_ptr, palette_to_index); - png_free(png_ptr, index_to_palette); - } - num_palette = maximum_colors; - } - if (png_ptr->palette == NULL) - { - png_ptr->palette = palette; - } - png_ptr->num_palette = (png_uint_16)num_palette; - - if (full_dither) - { - int i; - png_bytep distance; - int total_bits = PNG_DITHER_RED_BITS + PNG_DITHER_GREEN_BITS + - PNG_DITHER_BLUE_BITS; - int num_red = (1 << PNG_DITHER_RED_BITS); - int num_green = (1 << PNG_DITHER_GREEN_BITS); - int num_blue = (1 << PNG_DITHER_BLUE_BITS); - png_size_t num_entries = ((png_size_t)1 << total_bits); - - png_ptr->palette_lookup = (png_bytep )png_malloc(png_ptr, - (png_uint_32)(num_entries * sizeof (png_byte))); - - png_memset(png_ptr->palette_lookup, 0, num_entries * sizeof (png_byte)); - - distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries * - sizeof(png_byte))); - - png_memset(distance, 0xff, num_entries * sizeof(png_byte)); - - for (i = 0; i < num_palette; i++) - { - int ir, ig, ib; - int r = (palette[i].red >> (8 - PNG_DITHER_RED_BITS)); - int g = (palette[i].green >> (8 - PNG_DITHER_GREEN_BITS)); - int b = (palette[i].blue >> (8 - PNG_DITHER_BLUE_BITS)); - - for (ir = 0; ir < num_red; ir++) - { - int dr = abs(ir - r); - int index_r = (ir << (PNG_DITHER_BLUE_BITS + PNG_DITHER_GREEN_BITS)); - - for (ig = 0; ig < num_green; ig++) - { - int dg = abs(ig - g); - int dt = dr + dg; - int dm = ((dr > dg) ? dr : dg); - int index_g = index_r | (ig << PNG_DITHER_BLUE_BITS); - - for (ib = 0; ib < num_blue; ib++) - { - int d_index = index_g | ib; - int db = abs(ib - b); - int dmax = ((dm > db) ? dm : db); - int d = dmax + dt + db; - - if (d < (int)distance[d_index]) - { - distance[d_index] = (png_byte)d; - png_ptr->palette_lookup[d_index] = (png_byte)i; - } - } - } - } - } - - png_free(png_ptr, distance); - } -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -/* Transform the image from the file_gamma to the screen_gamma. We - * only do transformations on images where the file_gamma and screen_gamma - * are not close reciprocals, otherwise it slows things down slightly, and - * also needlessly introduces small errors. - */ -void -png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) -{ - png_debug(1, "in png_set_gamma\n"); - if (fabs(scrn_gamma * file_gamma - 1.0) > PNG_GAMMA_THRESHOLD) - png_ptr->transformations |= PNG_GAMMA; - png_ptr->gamma = (float)file_gamma; - png_ptr->screen_gamma = (float)scrn_gamma; -} -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expand paletted images to rgb, expand grayscale images of - * less than 8 bit depth to 8 bit depth, and expand tRNS chunks - * to alpha channels. - */ -void -png_set_expand(png_structp png_ptr) -{ - png_debug(1, "in png_set_expand\n"); - png_ptr->transformations |= PNG_EXPAND; -} -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -void -png_set_gray_to_rgb(png_structp png_ptr) -{ - png_debug(1, "in png_set_gray_to_rgb\n"); - png_ptr->transformations |= PNG_GRAY_TO_RGB; -} -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) -/* Convert a RGB image to a grayscale of the given width. This would - * allow us, for example, to convert a 24 bpp RGB image into an 8 or - * 16 bpp grayscale image. (Not yet implemented.) - */ -void -png_set_rgb_to_gray(png_structp png_ptr, int gray_bits) -{ - png_debug(1, "in png_set_rgb_to_gray\n"); - png_ptr->transformations |= PNG_RGB_TO_GRAY; - /* Need to do something with gray_bits here. */ - png_warning(png_ptr, "RGB to GRAY transformation is not yet implemented."); -} -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) -void -png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr - read_user_transform_fn) -{ - png_debug(1, "in png_set_read_user_transform_fn\n"); - png_ptr->transformations |= PNG_USER_TRANSFORM; - png_ptr->read_user_transform_fn = read_user_transform_fn; -} -#endif - -/* Initialize everything needed for the read. This includes modifying - * the palette. - */ -void -png_init_read_transformations(png_structp png_ptr) -{ - png_debug(1, "in png_init_read_transformations\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if(png_ptr != NULL) -#endif - { -#if defined(PNG_READ_BACKGROUND_SUPPORTED) || defined(PNG_READ_SHIFT_SUPPORTED) \ - || defined(PNG_READ_GAMMA_SUPPORTED) - int color_type = png_ptr->color_type; -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND_EXPAND) - { - if (!(color_type & PNG_COLOR_MASK_COLOR)) /* i.e., GRAY or GRAY_ALPHA */ - { - /* expand background chunk. */ - switch (png_ptr->bit_depth) - { - case 1: - png_ptr->background.gray *= (png_uint_16)0xff; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 2: - png_ptr->background.gray *= (png_uint_16)0x55; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 4: - png_ptr->background.gray *= (png_uint_16)0x11; - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - case 8: - case 16: - png_ptr->background.red = png_ptr->background.green = - png_ptr->background.blue = png_ptr->background.gray; - break; - } - } - else if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_ptr->background.red = - png_ptr->palette[png_ptr->background.index].red; - png_ptr->background.green = - png_ptr->palette[png_ptr->background.index].green; - png_ptr->background.blue = - png_ptr->palette[png_ptr->background.index].blue; - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_ALPHA) - { -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (!(png_ptr->transformations & PNG_EXPAND)) -#endif - { - /* invert the alpha channel (in tRNS) unless the pixels are - going to be expanded, in which case leave it for later */ - int i,istop; - istop=(int)png_ptr->num_trans; - for (i=0; itrans[i] = 255 - png_ptr->trans[i]; - } - } -#endif - - } - } -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - png_ptr->background_1 = png_ptr->background; -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->transformations & PNG_GAMMA) - { - png_build_gamma_table(png_ptr); -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_color back, back_1; - png_colorp palette = png_ptr->palette; - int num_palette = png_ptr->num_palette; - int i; - - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) - { - back.red = png_ptr->gamma_table[png_ptr->background.red]; - back.green = png_ptr->gamma_table[png_ptr->background.green]; - back.blue = png_ptr->gamma_table[png_ptr->background.blue]; - - back_1.red = png_ptr->gamma_to_1[png_ptr->background.red]; - back_1.green = png_ptr->gamma_to_1[png_ptr->background.green]; - back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue]; - } - else - { - double g, gs; - - switch (png_ptr->background_gamma_type) - { - case PNG_BACKGROUND_GAMMA_SCREEN: - g = (png_ptr->screen_gamma); - gs = 1.0; - break; - case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); - break; - default: - g = 1.0; /* back_1 */ - gs = 1.0; /* back */ - } - - if ( fabs(gs - 1.0) < PNG_GAMMA_THRESHOLD) - { - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - } - else - { - back.red = (png_byte)(pow( - (double)png_ptr->background.red/255, gs) * 255.0 + .5); - back.green = (png_byte)(pow( - (double)png_ptr->background.green/255, gs) * 255.0 + .5); - back.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255, gs) * 255.0 + .5); - } - - back_1.red = (png_byte)(pow( - (double)png_ptr->background.red/255, g) * 255.0 + .5); - back_1.green = (png_byte)(pow( - (double)png_ptr->background.green/255, g) * 255.0 + .5); - back_1.blue = (png_byte)(pow( - (double)png_ptr->background.blue/255, g) * 255.0 + .5); - } - - for (i = 0; i < num_palette; i++) - { - if (i < (int)png_ptr->num_trans && png_ptr->trans[i] != 0xff) - { - if (png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else /* if (png_ptr->trans[i] != 0xff) */ - { - png_byte v, w; - - v = png_ptr->gamma_to_1[palette[i].red]; - png_composite(w, v, png_ptr->trans[i], back_1.red); - palette[i].red = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[palette[i].green]; - png_composite(w, v, png_ptr->trans[i], back_1.green); - palette[i].green = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[palette[i].blue]; - png_composite(w, v, png_ptr->trans[i], back_1.blue); - palette[i].blue = png_ptr->gamma_from_1[w]; - } - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN)*/ - else - /* color_type != PNG_COLOR_TYPE_PALETTE */ - { - double m = (double)(((png_uint_32)1 << png_ptr->bit_depth) - 1); - double g = 1.0; - double gs = 1.0; - - switch (png_ptr->background_gamma_type) - { - case PNG_BACKGROUND_GAMMA_SCREEN: - g = (png_ptr->screen_gamma); - gs = 1.0; - break; - case PNG_BACKGROUND_GAMMA_FILE: - g = 1.0 / (png_ptr->gamma); - gs = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - break; - case PNG_BACKGROUND_GAMMA_UNIQUE: - g = 1.0 / (png_ptr->background_gamma); - gs = 1.0 / (png_ptr->background_gamma * - png_ptr->screen_gamma); - break; - } - - if (color_type & PNG_COLOR_MASK_COLOR) - { - /* RGB or RGBA */ - png_ptr->background_1.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, g) * m + .5); - png_ptr->background_1.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, g) * m + .5); - png_ptr->background_1.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, g) * m + .5); - png_ptr->background.red = (png_uint_16)(pow( - (double)png_ptr->background.red / m, gs) * m + .5); - png_ptr->background.green = (png_uint_16)(pow( - (double)png_ptr->background.green / m, gs) * m + .5); - png_ptr->background.blue = (png_uint_16)(pow( - (double)png_ptr->background.blue / m, gs) * m + .5); - } - else - { - /* GRAY or GRAY ALPHA */ - png_ptr->background_1.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, g) * m + .5); - png_ptr->background.gray = (png_uint_16)(pow( - (double)png_ptr->background.gray / m, gs) * m + .5); - } - } - } - else - /* transformation does not include PNG_BACKGROUND */ -#endif - if (color_type == PNG_COLOR_TYPE_PALETTE) - { - png_colorp palette = png_ptr->palette; - int num_palette = png_ptr->num_palette; - int i; - - for (i = 0; i < num_palette; i++) - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - else -#endif -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - /* No GAMMA transformation */ - if (png_ptr->transformations & PNG_BACKGROUND && - color_type == PNG_COLOR_TYPE_PALETTE) - { - int i; - int istop = (int)png_ptr->num_trans; - png_color back; - png_colorp palette = png_ptr->palette; - - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - - for (i = 0; i < istop; i++) - { - if (png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else if (png_ptr->trans[i] != 0xff) - { - /* The png_composite() macro is defined in png.h */ - png_composite(palette[i].red, palette[i].red, - png_ptr->trans[i], back.red); - png_composite(palette[i].green, palette[i].green, - png_ptr->trans[i], back.green); - png_composite(palette[i].blue, palette[i].blue, - png_ptr->trans[i], back.blue); - } - } - } -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) - if ((png_ptr->transformations & PNG_SHIFT) && - color_type == PNG_COLOR_TYPE_PALETTE) - { - png_uint_16 i; - png_uint_16 istop = png_ptr->num_palette; - int sr = 8 - png_ptr->sig_bit.red; - int sg = 8 - png_ptr->sig_bit.green; - int sb = 8 - png_ptr->sig_bit.blue; - - if (sr < 0 || sr > 8) - sr = 0; - if (sg < 0 || sg > 8) - sg = 0; - if (sb < 0 || sb > 8) - sb = 0; - for (i = 0; i < istop; i++) - { - png_ptr->palette[i].red >>= sr; - png_ptr->palette[i].green >>= sg; - png_ptr->palette[i].blue >>= sb; - } - } -#endif - } -} - -/* Modify the info structure to reflect the transformations. The - * info should be updated so a PNG file could be written with it, - * assuming the transformations result in valid PNG data. - */ -void -png_read_transform_info(png_structp png_ptr, png_infop info_ptr) -{ - png_debug(1, "in png_read_transform_info\n"); -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (png_ptr->num_trans) - info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA; - else - info_ptr->color_type = PNG_COLOR_TYPE_RGB; - info_ptr->bit_depth = 8; - info_ptr->num_trans = 0; - } - else - { - if (png_ptr->num_trans) - info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; - if (info_ptr->bit_depth < 8) - info_ptr->bit_depth = 8; - info_ptr->num_trans = 0; - } - } -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; - info_ptr->num_trans = 0; - info_ptr->background = png_ptr->background; - } -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->transformations & PNG_GAMMA) - info_ptr->gamma = png_ptr->gamma; -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) - if ((png_ptr->transformations & PNG_16_TO_8) && info_ptr->bit_depth == 16) - info_ptr->bit_depth = 8; -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) - if (png_ptr->transformations & PNG_DITHER) - { - if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || - (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) && - png_ptr->palette_lookup && info_ptr->bit_depth == 8) - { - info_ptr->color_type = PNG_COLOR_TYPE_PALETTE; - } - } -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) - if ((png_ptr->transformations & PNG_PACK) && info_ptr->bit_depth < 8) - info_ptr->bit_depth = 8; -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - if (png_ptr->transformations & PNG_GRAY_TO_RGB) - info_ptr->color_type |= PNG_COLOR_MASK_COLOR; -#endif - - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) - info_ptr->channels = 3; - else - info_ptr->channels = 1; - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_STRIP_ALPHA) - info_ptr->color_type &= ~PNG_COLOR_MASK_ALPHA; -#endif - - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) - info_ptr->channels++; - -#if defined(PNG_READ_FILLER_SUPPORTED) - /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */ - if (png_ptr->transformations & PNG_FILLER && - (info_ptr->color_type == PNG_COLOR_TYPE_RGB || - info_ptr->color_type == PNG_COLOR_TYPE_GRAY)) - ++info_ptr->channels; -#endif - - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * - info_ptr->bit_depth); - info_ptr->rowbytes = ((info_ptr->width * info_ptr->pixel_depth + 7) >> 3); -} - -/* Transform the row. The order of transformations is significant, - * and is very touchy. If you add a transformation, take care to - * decide how it fits in with the other transformations here. - */ -void -png_do_read_transformations(png_structp png_ptr) -{ - png_debug(1, "in png_do_read_transformations\n"); -#if !defined(PNG_USELESS_TESTS_SUPPORTED) - if (png_ptr->row_buf == NULL) - { -#if !defined(PNG_NO_STDIO) - char msg[50]; - - sprintf(msg, "NULL row buffer for row %ld, pass %d", png_ptr->row_number, - png_ptr->pass); - png_error(png_ptr, msg); -#else - png_error(png_ptr, "NULL row buffer"); -#endif - } -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->row_info.color_type == PNG_COLOR_TYPE_PALETTE) - { - png_do_expand_palette(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette, png_ptr->trans, png_ptr->num_trans); - } - else - { - if (png_ptr->num_trans) - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_values)); - else - png_do_expand(&(png_ptr->row_info), png_ptr->row_buf + 1, - NULL); - } - } -#endif - -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_STRIP_ALPHA) - png_do_strip_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - PNG_FLAG_FILLER_AFTER); -#endif - -/* -From Andreas Dilger e-mail to png-implement, 26 March 1998: - - In most cases, the "simple transparency" should be done prior to doing - gray-to-RGB, or you will have to test 3x as many bytes to check if a - pixel is transparent. You would also need to make sure that the - transparency information is upgraded to RGB. - - To summarize, the current flow is: - - Gray + simple transparency -> compare 1 or 2 gray bytes and composite - with background "in place" if transparent, - convert to RGB if necessary - - Gray + alpha -> composite with gray background and remove alpha bytes, - convert to RGB if necessary - - To support RGB backgrounds for gray images we need: - - Gray + simple transparency -> convert to RGB + simple transparency, compare - 3 or 6 bytes and composite with background - "in place" if transparent (3x compare/pixel - compared to doing composite with gray bkgrnd) - - Gray + alpha -> convert to RGB + alpha, composite with background and - remove alpha bytes (3x float operations/pixel - compared with composite on gray background) - - Greg's change will do this. The reason it wasn't done before is for - performance, as this increases the per-pixel operations. If we would check - in advance if the background was gray or RGB, and position the gray-to-RGB - transform appropriately, then it would save a lot of work/time. - */ - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - /* if gray -> RGB, do so now only if background is non-gray; else do later - * for performance reasons */ - if (png_ptr->transformations & PNG_GRAY_TO_RGB && - !(png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY)) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if ((png_ptr->transformations & PNG_BACKGROUND) && - ((png_ptr->num_trans != 0 ) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) - png_do_background(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->trans_values), &(png_ptr->background), - &(png_ptr->background_1), - png_ptr->gamma_table, png_ptr->gamma_from_1, - png_ptr->gamma_to_1, png_ptr->gamma_16_table, - png_ptr->gamma_16_from_1, png_ptr->gamma_16_to_1, - png_ptr->gamma_shift); -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) - if ((png_ptr->transformations & PNG_GAMMA) && -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - !((png_ptr->transformations & PNG_BACKGROUND) && - ((png_ptr->num_trans != 0) || - (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && -#endif - (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) - png_do_gamma(&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->gamma_table, png_ptr->gamma_16_table, - png_ptr->gamma_shift); -#endif - -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - if (png_ptr->transformations & PNG_RGB_TO_GRAY) - png_do_rgb_to_gray(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) - if (png_ptr->transformations & PNG_16_TO_8) - png_do_chop(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) - if (png_ptr->transformations & PNG_DITHER) - { - png_do_dither((png_row_infop)&(png_ptr->row_info), png_ptr->row_buf + 1, - png_ptr->palette_lookup, png_ptr->dither_index); - if(png_ptr->row_info.rowbytes == (png_uint_32)0) - png_error(png_ptr, "png_do_dither returned rowbytes=0"); - } -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_MONO) - png_do_invert(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) - if (png_ptr->transformations & PNG_SHIFT) - png_do_unshift(&(png_ptr->row_info), png_ptr->row_buf + 1, - &(png_ptr->shift)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) - if (png_ptr->transformations & PNG_PACK) - png_do_unpack(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) - if (png_ptr->transformations & PNG_BGR) - png_do_bgr(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - png_do_packswap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - /* if gray -> RGB, do so now only if we did not do so above */ - if (png_ptr->transformations & PNG_GRAY_TO_RGB && - png_ptr->flags & PNG_FLAG_BACKGROUND_IS_GRAY) - png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & PNG_FILLER) - png_do_read_filler(&(png_ptr->row_info), png_ptr->row_buf + 1, - (png_uint_32)png_ptr->filler, png_ptr->flags); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_INVERT_ALPHA) - png_do_read_invert_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_ALPHA) - png_do_read_swap_alpha(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) - if (png_ptr->transformations & PNG_SWAP_BYTES) - png_do_swap(&(png_ptr->row_info), png_ptr->row_buf + 1); -#endif - -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - if (png_ptr->transformations & PNG_USER_TRANSFORM) - if(png_ptr->read_user_transform_fn != NULL) - (*(png_ptr->read_user_transform_fn)) /* user read transform function */ - (png_ptr, /* png_ptr */ - &(png_ptr->row_info), /* row_info: */ - /* png_uint_32 width; width of row */ - /* png_uint_32 rowbytes; number of bytes in row */ - /* png_byte color_type; color type of pixels */ - /* png_byte bit_depth; bit depth of samples */ - /* png_byte channels; number of channels (1-4) */ - /* png_byte pixel_depth; bits per pixel (depth*channels) */ - png_ptr->row_buf + 1); /* start of pixel data for row */ -#endif - -} - -#if defined(PNG_READ_PACK_SUPPORTED) -/* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel, - * without changing the actual values. Thus, if you had a row with - * a bit depth of 1, you would end up with bytes that only contained - * the numbers 0 or 1. If you would rather they contain 0 and 255, use - * png_do_shift() after this. - */ -void -png_do_unpack(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_unpack\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && row_info->bit_depth < 8) -#else - if (row_info->bit_depth < 8) -#endif - { - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - switch (row_info->bit_depth) - { - case 1: - { - png_bytep sp = row + (png_size_t)((row_width - 1) >> 3); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = 7 - (int)((row_width + 7) & 7); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0x1); - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - - png_bytep sp = row + (png_size_t)((row_width - 1) >> 2); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = (int)((3 - ((row_width + 3) & 3)) << 1); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0x3); - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - png_bytep sp = row + (png_size_t)((row_width - 1) >> 1); - png_bytep dp = row + (png_size_t)row_width - 1; - png_uint_32 shift = (int)((1 - ((row_width + 1) & 1)) << 2); - for (i = 0; i < row_width; i++) - { - *dp = (png_byte)((*sp >> shift) & 0xf); - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift = 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = (png_byte)(8 * row_info->channels); - row_info->rowbytes = row_width * row_info->channels; - } -} -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) -/* Reverse the effects of png_do_shift. This routine merely shifts the - * pixels back to their significant bits values. Thus, if you have - * a row of bit depth 8, but only 5 are significant, this will shift - * the values back to 0 through 31. - */ -void -png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits) -{ - png_debug(1, "in png_do_unshift\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && sig_bits != NULL && -#endif - row_info->color_type != PNG_COLOR_TYPE_PALETTE) - { - int shift[4]; - int channels = 0; - int c; - png_uint_16 value = 0; - png_uint_32 row_width = row_info->width; - - if (row_info->color_type & PNG_COLOR_MASK_COLOR) - { - shift[channels++] = row_info->bit_depth - sig_bits->red; - shift[channels++] = row_info->bit_depth - sig_bits->green; - shift[channels++] = row_info->bit_depth - sig_bits->blue; - } - else - { - shift[channels++] = row_info->bit_depth - sig_bits->gray; - } - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - shift[channels++] = row_info->bit_depth - sig_bits->alpha; - } - - for (c = 0; c < channels; c++) - { - if (shift[c] <= 0) - shift[c] = 0; - else - value = 1; - } - - if (!value) - return; - - switch (row_info->bit_depth) - { - case 2: - { - png_bytep bp; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - - for (bp = row, i = 0; i < istop; i++) - { - *bp >>= 1; - *bp++ &= 0x55; - } - break; - } - case 4: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_byte mask = (png_byte)(((int)0xf0 >> shift[0]) & (int)0xf0) | - (png_byte)((int)0xf >> shift[0]); - - for (i = 0; i < istop; i++) - { - *bp >>= shift[0]; - *bp++ &= mask; - } - break; - } -#ifndef PNG_SLOW_SHIFT - case 8: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = row_width * channels; - - for (i = 0; i < istop; i++) - { - *bp++ >>= shift[i%channels]; - } - break; - } - case 16: - { - png_bytep bp = row; - png_uint_32 i; - png_uint_32 istop = channels * row_width; - - for (i = 0; i < istop; i++) - { - value = (png_uint_16)((*bp << 8) + *(bp + 1)); - value >>= shift[i%channels]; - *bp++ = (png_byte)(value >> 8); - *bp++ = (png_byte)(value & 0xff); - } - break; - } -#else - case 8: - { - png_bytep bp; - png_uint_32 i; - int cstop; - - cstop=(int)row_info->channels; - for (bp = row, i = 0; i < row_width; i++) - { - for (c = 0; c < cstop; c++, bp++) - { - *bp >>= shift[c]; - } - } - break; - } - case 16: - { - png_bytep bp; - png_size_t i; - int cstop; - - cstop=(int)row_info->channels; - for (bp = row, i = 0; i < row_width; i++) - { - for (c = 0; c < cstop; c++, bp += 2) - { - value = (png_uint_16)((*bp << 8) + *(bp + 1)); - value >>= shift[c]; - *bp = (png_byte)(value >> 8); - *(bp + 1) = (png_byte)(value & 0xff); - } - } - break; - } -#endif - } - } -} -#endif - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* chop rows of bit depth 16 down to 8 */ -void -png_do_chop(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_chop\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL && row_info->bit_depth == 16) -#else - if (row_info->bit_depth == 16) -#endif - { - png_bytep sp = row; - png_bytep dp = row; - png_uint_32 i; - png_uint_32 istop = row_info->width * row_info->channels; - - for (i = 0; i> 8)) >> 8; - * - * Approximate calculation with shift/add instead of multiply/divide: - * *dp = ((((png_uint_32)(*sp) << 8) | - * (png_uint_32)((int)(*(sp + 1)) - *sp)) + 128) >> 8; - * - * What we actually do to avoid extra shifting and conversion: - */ - - *dp = *sp + ((((int)(*(sp + 1)) - *sp) > 128) ? 1 : 0); -#else - /* Simply discard the low order byte */ - *dp = *sp; -#endif - } - row_info->bit_depth = 8; - row_info->pixel_depth = (png_byte)(8 * row_info->channels); - row_info->rowbytes = row_info->width * row_info->channels; - } -} -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) -void -png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_read_swap_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - png_uint_32 row_width = row_info->width; - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This converts from RGBA to ARGB */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save; - } - } - /* This converts from RRGGBBAA to AARRGGBB */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save[2]; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save[0] = *(--sp); - save[1] = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save[0]; - *(--dp) = save[1]; - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This converts from GA to AG */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save; - } - } - /* This converts from GGAA to AAGG */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_byte save[2]; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - save[0] = *(--sp); - save[1] = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = save[0]; - *(--dp) = save[1]; - } - } - } - } -} -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) -void -png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_read_invert_alpha\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - png_uint_32 row_width = row_info->width; - if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - /* This inverts the alpha channel in RGBA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = 255 - *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - } - /* This inverts the alpha channel in RRGGBBAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = 255 - *(--sp); - *(--dp) = 255 - *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - /* This inverts the alpha channel in GA */ - if (row_info->bit_depth == 8) - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = 255 - *(--sp); - *(--dp) = *(--sp); - } - } - /* This inverts the alpha channel in GGAA */ - else - { - png_bytep sp = row + row_info->rowbytes; - png_bytep dp = sp; - png_uint_32 i; - - for (i = 0; i < row_width; i++) - { - *(--dp) = 255 - *(--sp); - *(--dp) = 255 - *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - } - } - } -} -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) -/* Add filler channel if we have RGB color */ -void -png_do_read_filler(png_row_infop row_info, png_bytep row, - png_uint_32 filler, png_uint_32 flags) -{ - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - png_byte hi_filler = (png_byte)((filler>>8) & 0xff); - png_byte low_filler = (png_byte)(filler & 0xff); - - png_debug(1, "in png_do_read_filler\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - if(row_info->bit_depth == 8) - { - /* This changes the data from G to GX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = low_filler; - *(--dp) = *(--sp); - } - row_info->channels = 2; - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - /* This changes the data from G to XG */ - else - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = low_filler; - } - row_info->channels = 2; - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - } - else if(row_info->bit_depth == 16) - { - /* This changes the data from GG to GGXX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = hi_filler; - *(--dp) = low_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - row_info->channels = 2; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 2; - } - /* This changes the data from GG to XXGG */ - else - { - png_bytep sp = row + (png_size_t)row_width; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = hi_filler; - *(--dp) = low_filler; - } - row_info->channels = 2; - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - } - } /* COLOR_TYPE == GRAY */ - else if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - if(row_info->bit_depth == 8) - { - /* This changes the data from RGB to RGBX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = low_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - row_info->channels = 4; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - /* This changes the data from RGB to XRGB */ - else - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = low_filler; - } - row_info->channels = 4; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - } - } - else if(row_info->bit_depth == 16) - { - /* This changes the data from RRGGBB to RRGGBBXX */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 1; i < row_width; i++) - { - *(--dp) = hi_filler; - *(--dp) = low_filler; - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - } - row_info->channels = 4; - row_info->pixel_depth = 64; - row_info->rowbytes = row_width * 4; - } - /* This changes the data from RRGGBB to XXRRGGBB */ - else - { - png_bytep sp = row + (png_size_t)row_width * 3; - png_bytep dp = sp + (png_size_t)row_width; - for (i = 0; i < row_width; i++) - { - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = *(--sp); - *(--dp) = hi_filler; - *(--dp) = low_filler; - } - row_info->channels = 4; - row_info->pixel_depth = 64; - row_info->rowbytes = row_width * 4; - } - } - } /* COLOR_TYPE == RGB */ -} -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -/* expand grayscale files to RGB, with or without alpha */ -void -png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) -{ - png_uint_32 i; - png_uint_32 row_width = row_info->width; - - png_debug(1, "in png_do_gray_to_rgb\n"); - if (row_info->bit_depth >= 8 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - !(row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - if (row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - if (row_info->bit_depth == 8) - { - png_bytep sp = row + (png_size_t)row_width - 1; - png_bytep dp = sp + (png_size_t)row_width * 2; - for (i = 0; i < row_width; i++) - { - *(dp--) = *sp; - *(dp--) = *sp; - *(dp--) = *sp; - sp--; - } - } - else - { - png_bytep sp = row + (png_size_t)row_width * 2 - 1; - png_bytep dp = sp + (png_size_t)row_width * 4; - for (i = 0; i < row_width; i++) - { - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - sp--; - sp--; - } - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - if (row_info->bit_depth == 8) - { - png_bytep sp = row + (png_size_t)row_width * 2 - 1; - png_bytep dp = sp + (png_size_t)row_width * 2; - for (i = 0; i < row_width; i++) - { - *(dp--) = *(sp--); - *(dp--) = *sp; - *(dp--) = *sp; - *(dp--) = *sp; - sp--; - } - } - else - { - png_bytep sp = row + (png_size_t)row_width * 4 - 1; - png_bytep dp = sp + (png_size_t)row_width * 4; - for (i = 0; i < row_width; i++) - { - *(dp--) = *(sp--); - *(dp--) = *(sp--); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - *(dp--) = *sp; - *(dp--) = *(sp - 1); - sp--; - sp--; - } - } - } - row_info->channels += (png_byte)2; - row_info->color_type |= PNG_COLOR_MASK_COLOR; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = ((row_width * - row_info->pixel_depth + 7) >> 3); - } -} -#endif - -/* This function is currently unused. Do we really need it? */ -#if defined(PNG_READ_DITHER_SUPPORTED) && defined(PNG_CORRECT_PALETTE_SUPPORTED) -void -png_correct_palette(png_structp png_ptr, png_colorp palette, - int num_palette) -{ - png_debug(1, "in png_correct_palette\n"); -#if defined(PNG_READ_BACKGROUND_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if ((png_ptr->transformations & (PNG_GAMMA)) && - (png_ptr->transformations & (PNG_BACKGROUND))) - { - png_color back, back_1; - - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) - { - back.red = png_ptr->gamma_table[png_ptr->background.red]; - back.green = png_ptr->gamma_table[png_ptr->background.green]; - back.blue = png_ptr->gamma_table[png_ptr->background.blue]; - - back_1.red = png_ptr->gamma_to_1[png_ptr->background.red]; - back_1.green = png_ptr->gamma_to_1[png_ptr->background.green]; - back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue]; - } - else - { - double g; - - g = 1.0 / (png_ptr->background_gamma * png_ptr->screen_gamma); - - if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_SCREEN || - fabs(g - 1.0) < PNG_GAMMA_THRESHOLD) - { - back.red = png_ptr->background.red; - back.green = png_ptr->background.green; - back.blue = png_ptr->background.blue; - } - else - { - back.red = - (png_byte)(pow((double)png_ptr->background.red/255, g) * - 255.0 + 0.5); - back.green = - (png_byte)(pow((double)png_ptr->background.green/255, g) * - 255.0 + 0.5); - back.blue = - (png_byte)(pow((double)png_ptr->background.blue/255, g) * - 255.0 + 0.5); - } - - g = 1.0 / png_ptr->background_gamma; - - back_1.red = - (png_byte)(pow((double)png_ptr->background.red/255, g) * - 255.0 + 0.5); - back_1.green = - (png_byte)(pow((double)png_ptr->background.green/255, g) * - 255.0 + 0.5); - back_1.blue = - (png_byte)(pow((double)png_ptr->background.blue/255, g) * - 255.0 + 0.5); - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_uint_32 i; - - for (i = 0; i < (png_uint_32)num_palette; i++) - { - if (i < png_ptr->num_trans && png_ptr->trans[i] == 0) - { - palette[i] = back; - } - else if (i < png_ptr->num_trans && png_ptr->trans[i] != 0xff) - { - png_byte v, w; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].red]; - png_composite(w, v, png_ptr->trans[i], back_1.red); - palette[i].red = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].green]; - png_composite(w, v, png_ptr->trans[i], back_1.green); - palette[i].green = png_ptr->gamma_from_1[w]; - - v = png_ptr->gamma_to_1[png_ptr->palette[i].blue]; - png_composite(w, v, png_ptr->trans[i], back_1.blue); - palette[i].blue = png_ptr->gamma_from_1[w]; - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - else - { - int i; - - for (i = 0; i < num_palette; i++) - { - if (palette[i].red == (png_byte)png_ptr->trans_values.gray) - { - palette[i] = back; - } - else - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } - } - } - else -#endif -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (png_ptr->transformations & PNG_GAMMA) - { - int i; - - for (i = 0; i < num_palette; i++) - { - palette[i].red = png_ptr->gamma_table[palette[i].red]; - palette[i].green = png_ptr->gamma_table[palette[i].green]; - palette[i].blue = png_ptr->gamma_table[palette[i].blue]; - } - } -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - else -#endif -#endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_color back; - - back.red = (png_byte)png_ptr->background.red; - back.green = (png_byte)png_ptr->background.green; - back.blue = (png_byte)png_ptr->background.blue; - - for (i = 0; i < (int)png_ptr->num_trans; i++) - { - if (png_ptr->trans[i] == 0) - { - palette[i].red = back.red; - palette[i].green = back.green; - palette[i].blue = back.blue; - } - else if (png_ptr->trans[i] != 0xff) - { - png_composite(palette[i].red, png_ptr->palette[i].red, - png_ptr->trans[i], back.red); - png_composite(palette[i].green, png_ptr->palette[i].green, - png_ptr->trans[i], back.green); - png_composite(palette[i].blue, png_ptr->palette[i].blue, - png_ptr->trans[i], back.blue); - } - } - } - else /* assume grayscale palette (what else could it be?) */ - { - int i; - - for (i = 0; i < num_palette; i++) - { - if (i == (png_byte)png_ptr->trans_values.gray) - { - palette[i].red = (png_byte)png_ptr->background.red; - palette[i].green = (png_byte)png_ptr->background.green; - palette[i].blue = (png_byte)png_ptr->background.blue; - } - } - } - } -#endif -} -#endif - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -/* Replace any alpha or transparency with the supplied background color. - * "background" is already in the screen gamma, while "background_1" is - * at a gamma of 1.0. Paletted files have already been taken care of. - */ -void -png_do_background(png_row_infop row_info, png_bytep row, - png_color_16p trans_values, png_color_16p background, - png_color_16p background_1, - png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, - png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, - png_uint_16pp gamma_16_to_1, int gamma_shift) -{ - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - int shift; - - png_debug(1, "in png_do_background\n"); - if (background != NULL && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (!(row_info->color_type & PNG_COLOR_MASK_ALPHA) || - (row_info->color_type != PNG_COLOR_TYPE_PALETTE && trans_values))) - { - switch (row_info->color_type) - { - case PNG_COLOR_TYPE_GRAY: - { - switch (row_info->bit_depth) - { - case 1: - { - sp = row; - shift = 7; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x1) - == trans_values->gray) - { - *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 7; - sp++; - } - else - shift--; - } - break; - } - case 2: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - shift = 6; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x3) - == trans_values->gray) - { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - else - { - png_byte p = (*sp >> shift) & 0x3; - png_byte g = (gamma_table [p | (p << 2) | (p << 4) | - (p << 6)] >> 6) & 0x3; - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); - } - if (!shift) - { - shift = 6; - sp++; - } - else - shift -= 2; - } - } - else -#endif - { - sp = row; - shift = 6; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0x3) - == trans_values->gray) - { - *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 6; - sp++; - } - else - shift -= 2; - } - } - break; - } - case 4: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - shift = 4; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0xf) - == trans_values->gray) - { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - else - { - png_byte p = (*sp >> shift) & 0xf; - png_byte g = (gamma_table[p | (p << 4)] >> 4) & 0xf; - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(g << shift); - } - if (!shift) - { - shift = 4; - sp++; - } - else - shift -= 4; - } - } - else -#endif - { - sp = row; - shift = 4; - for (i = 0; i < row_width; i++) - { - if ((png_uint_16)((*sp >> shift) & 0xf) - == trans_values->gray) - { - *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *sp |= (png_byte)(background->gray << shift); - } - if (!shift) - { - shift = 4; - sp++; - } - else - shift -= 4; - } - } - break; - } - case 8: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - if (*sp == trans_values->gray) - { - *sp = (png_byte)background->gray; - } - else - { - *sp = gamma_table[*sp]; - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - if (*sp == trans_values->gray) - { - *sp = (png_byte)background->gray; - } - } - } - break; - } - case 16: - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 2) - { - png_uint_16 v; - - v = ((png_uint_16)(*sp) << 8) + *(sp + 1); - if (v == trans_values->gray) - { - /* background is already in screen gamma */ - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 2) - { - png_uint_16 v; - - v = ((png_uint_16)(*sp) << 8) + *(sp + 1); - if (v == trans_values->gray) - { - *sp = (png_byte)((background->gray >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->gray & 0xff); - } - } - } - break; - } - } - break; - } - case PNG_COLOR_TYPE_RGB: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_table != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 3) - { - if (*sp == trans_values->red && - *(sp + 1) == trans_values->green && - *(sp + 2) == trans_values->blue) - { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; - } - else - { - *sp = gamma_table[*sp]; - *(sp + 1) = gamma_table[*(sp + 1)]; - *(sp + 2) = gamma_table[*(sp + 2)]; - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 3) - { - if (*sp == trans_values->red && - *(sp + 1) == trans_values->green && - *(sp + 2) == trans_values->blue) - { - *sp = (png_byte)background->red; - *(sp + 1) = (png_byte)background->green; - *(sp + 2) = (png_byte)background->blue; - } - } - } - } - else /* if (row_info->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL) - { - sp = row; - for (i = 0; i < row_width; i++, sp += 6) - { - png_uint_16 r = ((png_uint_16)(*sp) << 8) + *(sp + 1); - png_uint_16 g = ((png_uint_16)(*(sp + 2)) << 8) + *(sp + 3); - png_uint_16 b = ((png_uint_16)(*(sp + 4)) << 8) + *(sp + 5); - if (r == trans_values->red && g == trans_values->green && - b == trans_values->blue) - { - /* background is already in screen gamma */ - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; - *(sp + 2) = (png_byte)((v >> 8) & 0xff); - *(sp + 3) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; - *(sp + 4) = (png_byte)((v >> 8) & 0xff); - *(sp + 5) = (png_byte)(v & 0xff); - } - } - } - else -#endif - { - sp = row; - for (i = 0; i < row_width; i++, sp += 6) - { - png_uint_16 r = ((png_uint_16)(*sp) << 8) + *(sp + 1); - png_uint_16 g = ((png_uint_16)(*(sp + 2)) << 8) + *(sp + 3); - png_uint_16 b = ((png_uint_16)(*(sp + 4)) << 8) + *(sp + 5); - - if (r == trans_values->red && g == trans_values->green && - b == trans_values->blue) - { - *sp = (png_byte)((background->red >> 8) & 0xff); - *(sp + 1) = (png_byte)(background->red & 0xff); - *(sp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(sp + 3) = (png_byte)(background->green & 0xff); - *(sp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(sp + 5) = (png_byte)(background->blue & 0xff); - } - } - } - } - break; - } - case PNG_COLOR_TYPE_GRAY_ALPHA: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_to_1 != NULL && gamma_from_1 != NULL && - gamma_table != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) - { - png_uint_16 a = *(sp + 1); - - if (a == 0xff) - { - *dp = gamma_table[*sp]; - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)background->gray; - } - else - { - png_byte v, w; - - v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->gray); - *dp = gamma_from_1[w]; - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 2, dp++) - { - png_byte a = *(sp + 1); - - if (a == 0xff) - { - *dp = *sp; - } - else if (a == 0) - { - *dp = (png_byte)background->gray; - } - else - { - png_composite(*dp, *sp, a, background_1->gray); - } - } - } - } - else /* if (png_ptr->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL && gamma_16_from_1 != NULL && - gamma_16_to_1 != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) - { - png_uint_16 a = ((png_uint_16)(*(sp + 2)) << 8) + *(sp + 3); - - if (a == (png_uint_16)0xffff) - { - png_uint_16 v; - - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - png_uint_16 g, v, w; - - g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(v, g, a, background_1->gray); - w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; - *dp = (png_byte)((w >> 8) & 0xff); - *(dp + 1) = (png_byte)(w & 0xff); - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 2) - { - png_uint_16 a = ((png_uint_16)(*(sp + 2)) << 8) + *(sp + 3); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 2); - } - else if (a == 0) - { - *dp = (png_byte)((background->gray >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->gray & 0xff); - } - else - { - png_uint_16 g, v; - - g = ((png_uint_16)(*sp) << 8) + *(sp + 1); - png_composite_16(v, g, a, background_1->gray); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - } - } - } - } - break; - } - case PNG_COLOR_TYPE_RGB_ALPHA: - { - if (row_info->bit_depth == 8) - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_to_1 != NULL && gamma_from_1 != NULL && - gamma_table != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) - { - png_byte a = *(sp + 3); - - if (a == 0xff) - { - *dp = gamma_table[*sp]; - *(dp + 1) = gamma_table[*(sp + 1)]; - *(dp + 2) = gamma_table[*(sp + 2)]; - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; - } - else - { - png_byte v, w; - - v = gamma_to_1[*sp]; - png_composite(w, v, a, background_1->red); - *dp = gamma_from_1[w]; - v = gamma_to_1[*(sp + 1)]; - png_composite(w, v, a, background_1->green); - *(dp + 1) = gamma_from_1[w]; - v = gamma_to_1[*(sp + 2)]; - png_composite(w, v, a, background_1->blue); - *(dp + 2) = gamma_from_1[w]; - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 4, dp += 3) - { - png_byte a = *(sp + 3); - - if (a == 0xff) - { - *dp = *sp; - *(dp + 1) = *(sp + 1); - *(dp + 2) = *(sp + 2); - } - else if (a == 0) - { - *dp = (png_byte)background->red; - *(dp + 1) = (png_byte)background->green; - *(dp + 2) = (png_byte)background->blue; - } - else - { - png_composite(*dp, *sp, a, background->red); - png_composite(*(dp + 1), *(sp + 1), a, - background->green); - png_composite(*(dp + 2), *(sp + 2), a, - background->blue); - } - } - } - } - else /* if (row_info->bit_depth == 16) */ - { -#if defined(PNG_READ_GAMMA_SUPPORTED) - if (gamma_16 != NULL && gamma_16_from_1 != NULL && - gamma_16_to_1 != NULL) - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) - { - png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) - << 8) + (png_uint_16)(*(sp + 7))); - if (a == (png_uint_16)0xffff) - { - png_uint_16 v; - - v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); - v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); - } - else if (a == 0) - { - /* background is already in screen gamma */ - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v, w, x; - - v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; - png_composite_16(w, v, a, background->red); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *dp = (png_byte)((x >> 8) & 0xff); - *(dp + 1) = (png_byte)(x & 0xff); - v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; - png_composite_16(w, v, a, background->green); - x = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; - *(dp + 2) = (png_byte)((x >> 8) & 0xff); - *(dp + 3) = (png_byte)(x & 0xff); - v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; - png_composite_16(w, v, a, background->blue); - x = gamma_16_from_1[(w & 0xff) >> gamma_shift][w >> 8]; - *(dp + 4) = (png_byte)((x >> 8) & 0xff); - *(dp + 5) = (png_byte)(x & 0xff); - } - } - } - else -#endif - { - sp = row; - dp = row; - for (i = 0; i < row_width; i++, sp += 8, dp += 6) - { - png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) - << 8) + (png_uint_16)(*(sp + 7))); - if (a == (png_uint_16)0xffff) - { - png_memcpy(dp, sp, 6); - } - else if (a == 0) - { - *dp = (png_byte)((background->red >> 8) & 0xff); - *(dp + 1) = (png_byte)(background->red & 0xff); - *(dp + 2) = (png_byte)((background->green >> 8) & 0xff); - *(dp + 3) = (png_byte)(background->green & 0xff); - *(dp + 4) = (png_byte)((background->blue >> 8) & 0xff); - *(dp + 5) = (png_byte)(background->blue & 0xff); - } - else - { - png_uint_16 v; - - png_uint_16 r = ((png_uint_16)(*sp) << 8) + *(sp + 1); - png_uint_16 g = ((png_uint_16)(*(sp + 2)) << 8) - + *(sp + 3); - png_uint_16 b = ((png_uint_16)(*(sp + 4)) << 8) - + *(sp + 5); - - png_composite_16(v, r, a, background->red); - *dp = (png_byte)((v >> 8) & 0xff); - *(dp + 1) = (png_byte)(v & 0xff); - png_composite_16(v, g, a, background->green); - *(dp + 2) = (png_byte)((v >> 8) & 0xff); - *(dp + 3) = (png_byte)(v & 0xff); - png_composite_16(v, b, a, background->blue); - *(dp + 4) = (png_byte)((v >> 8) & 0xff); - *(dp + 5) = (png_byte)(v & 0xff); - } - } - } - } - break; - } - } - - if (row_info->color_type & PNG_COLOR_MASK_ALPHA) - { - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - row_info->channels--; - row_info->pixel_depth = (png_byte)(row_info->channels * - row_info->bit_depth); - row_info->rowbytes = ((row_width * - row_info->pixel_depth + 7) >> 3); - } - } -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -/* Gamma correct the image, avoiding the alpha channel. Make sure - * you do this after you deal with the transparency issue on grayscale - * or rgb images. If your bit depth is 8, use gamma_table, if it - * is 16, use gamma_16_table and gamma_shift. Build these with - * build_gamma_table(). - */ -void -png_do_gamma(png_row_infop row_info, png_bytep row, - png_bytep gamma_table, png_uint_16pp gamma_16_table, - int gamma_shift) -{ - png_bytep sp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_gamma\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - ((row_info->bit_depth <= 8 && gamma_table != NULL) || - (row_info->bit_depth == 16 && gamma_16_table != NULL))) - { - switch (row_info->color_type) - { - case PNG_COLOR_TYPE_RGB: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v; - - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - } - } - break; - } - case PNG_COLOR_TYPE_RGB_ALPHA: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - *sp = gamma_table[*sp]; - sp++; - sp++; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 4; - } - } - break; - } - case PNG_COLOR_TYPE_GRAY_ALPHA: - { - if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp += 2; - } - } - else /* if (row_info->bit_depth == 16) */ - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 4; - } - } - break; - } - case PNG_COLOR_TYPE_GRAY: - { - if (row_info->bit_depth == 2) - { - sp = row; - for (i = 0; i < row_width; i += 4) - { - int a = *sp & 0xc0; - int b = *sp & 0x30; - int c = *sp & 0x0c; - int d = *sp & 0x03; - - *sp = ((((int)gamma_table[a|(a>>2)|(a>>4)|(a>>6)]) ) & 0xc0)| - ((((int)gamma_table[(b<<2)|b|(b>>2)|(b>>4)])>>2) & 0x30)| - ((((int)gamma_table[(c<<4)|(c<<2)|c|(c>>2)])>>4) & 0x0c)| - ((((int)gamma_table[(d<<6)|(d<<4)|(d<<2)|d])>>6) ); - sp++; - } - } - if (row_info->bit_depth == 4) - { - sp = row; - for (i = 0; i < row_width; i += 2) - { - int msb = *sp & 0xf0; - int lsb = *sp & 0x0f; - - *sp = (((int)gamma_table[msb | (msb >> 4)]) & 0xf0) | - (((int)gamma_table[(lsb << 4) | lsb]) >> 4); - sp++; - } - } - else if (row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++) - { - *sp = gamma_table[*sp]; - sp++; - } - } - else if (row_info->bit_depth == 16) - { - sp = row; - for (i = 0; i < row_width; i++) - { - png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; - *sp = (png_byte)((v >> 8) & 0xff); - *(sp + 1) = (png_byte)(v & 0xff); - sp += 2; - } - } - break; - } - } - } -} -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) -/* Expands a palette row to an rgb or rgba row depending - * upon whether you supply trans and num_trans. - */ -void -png_do_expand_palette(png_row_infop row_info, png_bytep row, - png_colorp palette, png_bytep trans, int num_trans) -{ - int shift, value; - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_expand_palette\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (row_info->bit_depth < 8) - { - switch (row_info->bit_depth) - { - case 1: - { - sp = row + (png_size_t)((row_width - 1) >> 3); - dp = row + (png_size_t)row_width - 1; - shift = 7 - (int)((row_width + 7) & 7); - for (i = 0; i < row_width; i++) - { - if ((*sp >> shift) & 0x1) - *dp = 1; - else - *dp = 0; - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - sp = row + (png_size_t)((row_width - 1) >> 2); - dp = row + (png_size_t)row_width - 1; - shift = (int)((3 - ((row_width + 3) & 3)) << 1); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x3; - *dp = (png_byte)value; - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - sp = row + (png_size_t)((row_width - 1) >> 1); - dp = row + (png_size_t)row_width - 1; - shift = (int)((row_width & 1) << 2); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0xf; - *dp = (png_byte)value; - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift += 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - switch (row_info->bit_depth) - { - case 8: - { - if (trans != NULL) - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width << 2) - 1; - - for (i = 0; i < row_width; i++) - { - if ((int)(*sp) >= num_trans) - *dp-- = 0xff; - else - *dp-- = trans[*sp]; - *dp-- = palette[*sp].blue; - *dp-- = palette[*sp].green; - *dp-- = palette[*sp].red; - sp--; - } - row_info->bit_depth = 8; - row_info->pixel_depth = 32; - row_info->rowbytes = row_width * 4; - row_info->color_type = 6; - row_info->channels = 4; - } - else - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width * 3) - 1; - - for (i = 0; i < row_width; i++) - { - *dp-- = palette[*sp].blue; - *dp-- = palette[*sp].green; - *dp-- = palette[*sp].red; - sp--; - } - row_info->bit_depth = 8; - row_info->pixel_depth = 24; - row_info->rowbytes = row_width * 3; - row_info->color_type = 2; - row_info->channels = 3; - } - break; - } - } - } -} - -/* If the bit depth < 8, it is expanded to 8. Also, if the - * transparency value is supplied, an alpha channel is built. - */ -void -png_do_expand(png_row_infop row_info, png_bytep row, - png_color_16p trans_value) -{ - int shift, value; - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_expand\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - png_uint_16 gray = trans_value ? trans_value->gray : 0; - - if (row_info->bit_depth < 8) - { - switch (row_info->bit_depth) - { - case 1: - { - gray *= 0xff; - sp = row + (png_size_t)((row_width - 1) >> 3); - dp = row + (png_size_t)row_width - 1; - shift = 7 - (int)((row_width + 7) & 7); - for (i = 0; i < row_width; i++) - { - if ((*sp >> shift) & 0x1) - *dp = 0xff; - else - *dp = 0; - if (shift == 7) - { - shift = 0; - sp--; - } - else - shift++; - - dp--; - } - break; - } - case 2: - { - gray *= 0x55; - sp = row + (png_size_t)((row_width - 1) >> 2); - dp = row + (png_size_t)row_width - 1; - shift = (int)((3 - ((row_width + 3) & 3)) << 1); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0x3; - *dp = (png_byte)(value | (value << 2) | (value << 4) | - (value << 6)); - if (shift == 6) - { - shift = 0; - sp--; - } - else - shift += 2; - - dp--; - } - break; - } - case 4: - { - gray *= 0x11; - sp = row + (png_size_t)((row_width - 1) >> 1); - dp = row + (png_size_t)row_width - 1; - shift = (int)((1 - ((row_width + 1) & 1)) << 2); - for (i = 0; i < row_width; i++) - { - value = (*sp >> shift) & 0xf; - *dp = (png_byte)(value | (value << 4)); - if (shift == 4) - { - shift = 0; - sp--; - } - else - shift = 4; - - dp--; - } - break; - } - } - row_info->bit_depth = 8; - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - - if (trans_value != NULL) - { - if (row_info->bit_depth == 8) - { - sp = row + (png_size_t)row_width - 1; - dp = row + (png_size_t)(row_width << 1) - 1; - for (i = 0; i < row_width; i++) - { - if (*sp == gray) - *dp-- = 0; - else - *dp-- = 0xff; - *dp-- = *sp--; - } - } - else if (row_info->bit_depth == 16) - { - sp = row + row_info->rowbytes - 1; - dp = row + (row_info->rowbytes << 1) - 1; - for (i = 0; i < row_width; i++) - { - if (((png_uint_16)*(sp) | - ((png_uint_16)*(sp - 1) << 8)) == gray) - { - *dp-- = 0; - *dp-- = 0; - } - else - { - *dp-- = 0xff; - *dp-- = 0xff; - } - *dp-- = *sp--; - *dp-- = *sp--; - } - } - row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - row_info->channels = 2; - row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1); - row_info->rowbytes = - ((row_width * row_info->pixel_depth) >> 3); - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_value) - { - if (row_info->bit_depth == 8) - { - sp = row + (png_size_t)row_info->rowbytes - 1; - dp = row + (png_size_t)(row_width << 2) - 1; - for (i = 0; i < row_width; i++) - { - if (*(sp - 2) == trans_value->red && - *(sp - 1) == trans_value->green && - *(sp - 0) == trans_value->blue) - *dp-- = 0; - else - *dp-- = 0xff; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - } - } - else if (row_info->bit_depth == 16) - { - sp = row + row_info->rowbytes - 1; - dp = row + (png_size_t)(row_width << 3) - 1; - for (i = 0; i < row_width; i++) - { - if ((((png_uint_16)*(sp - 4) | - ((png_uint_16)*(sp - 5) << 8)) == trans_value->red) && - (((png_uint_16)*(sp - 2) | - ((png_uint_16)*(sp - 3) << 8)) == trans_value->green) && - (((png_uint_16)*(sp - 0) | - ((png_uint_16)*(sp - 1) << 8)) == trans_value->blue)) - { - *dp-- = 0; - *dp-- = 0; - } - else - { - *dp-- = 0xff; - *dp-- = 0xff; - } - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - *dp-- = *sp--; - } - } - row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA; - row_info->channels = 4; - row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2); - row_info->rowbytes = - ((row_width * row_info->pixel_depth) >> 3); - } - } -} -#endif - -#if defined(PNG_READ_DITHER_SUPPORTED) -void -png_do_dither(png_row_infop row_info, png_bytep row, - png_bytep palette_lookup, png_bytep dither_lookup) -{ - png_bytep sp, dp; - png_uint_32 i; - png_uint_32 row_width=row_info->width; - - png_debug(1, "in png_do_dither\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB && - palette_lookup && row_info->bit_depth == 8) - { - int r, g, b, p; - sp = row; - dp = row; - for (i = 0; i < row_width; i++) - { - r = *sp++; - g = *sp++; - b = *sp++; - - /* this looks real messy, but the compiler will reduce - it down to a reasonable formula. For example, with - 5 bits per color, we get: - p = (((r >> 3) & 0x1f) << 10) | - (((g >> 3) & 0x1f) << 5) | - ((b >> 3) & 0x1f); - */ - p = (((r >> (8 - PNG_DITHER_RED_BITS)) & - ((1 << PNG_DITHER_RED_BITS) - 1)) << - (PNG_DITHER_GREEN_BITS + PNG_DITHER_BLUE_BITS)) | - (((g >> (8 - PNG_DITHER_GREEN_BITS)) & - ((1 << PNG_DITHER_GREEN_BITS) - 1)) << - (PNG_DITHER_BLUE_BITS)) | - ((b >> (8 - PNG_DITHER_BLUE_BITS)) & - ((1 << PNG_DITHER_BLUE_BITS) - 1)); - - *dp++ = palette_lookup[p]; - } - row_info->color_type = PNG_COLOR_TYPE_PALETTE; - row_info->channels = 1; - row_info->pixel_depth = row_info->bit_depth; - row_info->rowbytes = - ((row_width * row_info->pixel_depth + 7) >> 3); - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA && - palette_lookup != NULL && row_info->bit_depth == 8) - { - int r, g, b, p; - sp = row; - dp = row; - for (i = 0; i < row_width; i++) - { - r = *sp++; - g = *sp++; - b = *sp++; - sp++; - - p = (((r >> (8 - PNG_DITHER_RED_BITS)) & - ((1 << PNG_DITHER_RED_BITS) - 1)) << - (PNG_DITHER_GREEN_BITS + PNG_DITHER_BLUE_BITS)) | - (((g >> (8 - PNG_DITHER_GREEN_BITS)) & - ((1 << PNG_DITHER_GREEN_BITS) - 1)) << - (PNG_DITHER_BLUE_BITS)) | - ((b >> (8 - PNG_DITHER_BLUE_BITS)) & - ((1 << PNG_DITHER_BLUE_BITS) - 1)); - - *dp++ = palette_lookup[p]; - } - row_info->color_type = PNG_COLOR_TYPE_PALETTE; - row_info->channels = 1; - row_info->pixel_depth = row_info->bit_depth; - row_info->rowbytes = - ((row_width * row_info->pixel_depth + 7) >> 3); - } - else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && - dither_lookup && row_info->bit_depth == 8) - { - sp = row; - for (i = 0; i < row_width; i++, sp++) - { - *sp = dither_lookup[*sp]; - } - } - } -} -#endif - -#if defined(PNG_READ_GAMMA_SUPPORTED) -static int png_gamma_shift[] = - {0x10, 0x21, 0x42, 0x84, 0x110, 0x248, 0x550, 0xff0}; - -/* We build the 8- or 16-bit gamma tables here. Note that for 16-bit - * tables, we don't make a full table if we are reducing to 8-bit in - * the future. Note also how the gamma_16 tables are segmented so that - * we don't need to allocate > 64K chunks for a full 16-bit table. - */ -void -png_build_gamma_table(png_structp png_ptr) -{ - png_debug(1, "in png_build_gamma_table\n"); - if (png_ptr->bit_depth <= 8) - { - int i; - double g; - - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - - png_ptr->gamma_table = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_table[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_to_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_to_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - - g = 1.0 / (png_ptr->screen_gamma); - - png_ptr->gamma_from_1 = (png_bytep)png_malloc(png_ptr, - (png_uint_32)256); - - for (i = 0; i < 256; i++) - { - png_ptr->gamma_from_1[i] = (png_byte)(pow((double)i / 255.0, - g) * 255.0 + .5); - } - } -#endif /* PNG_BACKGROUND_SUPPORTED */ - } - else - { - double g; - int i, j, shift, num; - int sig_bit; - png_uint_32 ig; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - sig_bit = (int)png_ptr->sig_bit.red; - if ((int)png_ptr->sig_bit.green > sig_bit) - sig_bit = png_ptr->sig_bit.green; - if ((int)png_ptr->sig_bit.blue > sig_bit) - sig_bit = png_ptr->sig_bit.blue; - } - else - { - sig_bit = (int)png_ptr->sig_bit.gray; - } - - if (sig_bit > 0) - shift = 16 - sig_bit; - else - shift = 0; - - if (png_ptr->transformations & PNG_16_TO_8) - { - if (shift < (16 - PNG_MAX_GAMMA_8)) - shift = (16 - PNG_MAX_GAMMA_8); - } - - if (shift > 8) - shift = 8; - if (shift < 0) - shift = 0; - - png_ptr->gamma_shift = (png_byte)shift; - - num = (1 << (8 - shift)); - - g = 1.0 / (png_ptr->gamma * png_ptr->screen_gamma); - - png_ptr->gamma_16_table = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p))); - - if ((png_ptr->transformations & PNG_16_TO_8) && - !(png_ptr->transformations & PNG_BACKGROUND)) - { - double fin, fout; - png_uint_32 last, max; - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - } - - g = 1.0 / g; - last = 0; - for (i = 0; i < 256; i++) - { - fout = ((double)i + 0.5) / 256.0; - fin = pow(fout, g); - max = (png_uint_32)(fin * (double)((png_uint_32)num << 8)); - while (last <= max) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)( - (png_uint_16)i | ((png_uint_16)i << 8)); - last++; - } - } - while (last < ((png_uint_32)num << 8)) - { - png_ptr->gamma_16_table[(int)(last & (0xff >> shift))] - [(int)(last >> (8 - shift))] = (png_uint_16)65535L; - last++; - } - } - else - { - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_table[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_table[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) - if (png_ptr->transformations & PNG_BACKGROUND) - { - g = 1.0 / (png_ptr->gamma); - - png_ptr->gamma_16_to_1 = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p ))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_to_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_to_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - g = 1.0 / (png_ptr->screen_gamma); - - png_ptr->gamma_16_from_1 = (png_uint_16pp)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16p))); - - for (i = 0; i < num; i++) - { - png_ptr->gamma_16_from_1[i] = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(256 * sizeof (png_uint_16))); - - ig = (((png_uint_32)i * - (png_uint_32)png_gamma_shift[shift]) >> 4); - for (j = 0; j < 256; j++) - { - png_ptr->gamma_16_from_1[i][j] = - (png_uint_16)(pow((double)(ig + ((png_uint_32)j << 8)) / - 65535.0, g) * 65535.0 + .5); - } - } - } -#endif /* PNG_BACKGROUND_SUPPORTED */ - } -} -#endif - - + +/* pngrtran.c - transforms the data in a row for PNG readers + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file contains functions optionally called by an application + * in order to tell libpng how to handle data when reading a PNG. + * Transformations that are used in both reading and writing are + * in pngtrans.c. + */ + +#include "pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +/* Set the action on getting a CRC error for an ancillary or critical chunk. */ +void PNGAPI +png_set_crc_action(png_structp png_ptr, int crit_action, int ancil_action) +{ + png_debug(1, "in png_set_crc_action"); + + if (png_ptr == NULL) + return; + + /* Tell libpng how we react to CRC errors in critical chunks */ + switch (crit_action) + { + case PNG_CRC_NO_CHANGE: /* Leave setting as is */ + break; + + case PNG_CRC_WARN_USE: /* Warn/use data */ + png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; + png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE; + break; + + case PNG_CRC_QUIET_USE: /* Quiet/use data */ + png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; + png_ptr->flags |= PNG_FLAG_CRC_CRITICAL_USE | + PNG_FLAG_CRC_CRITICAL_IGNORE; + break; + + case PNG_CRC_WARN_DISCARD: /* Not a valid action for critical data */ + png_warning(png_ptr, + "Can't discard critical data on CRC error"); + case PNG_CRC_ERROR_QUIT: /* Error/quit */ + + case PNG_CRC_DEFAULT: + default: + png_ptr->flags &= ~PNG_FLAG_CRC_CRITICAL_MASK; + break; + } + + /* Tell libpng how we react to CRC errors in ancillary chunks */ + switch (ancil_action) + { + case PNG_CRC_NO_CHANGE: /* Leave setting as is */ + break; + + case PNG_CRC_WARN_USE: /* Warn/use data */ + png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; + png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE; + break; + + case PNG_CRC_QUIET_USE: /* Quiet/use data */ + png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; + png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_USE | + PNG_FLAG_CRC_ANCILLARY_NOWARN; + break; + + case PNG_CRC_ERROR_QUIT: /* Error/quit */ + png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; + png_ptr->flags |= PNG_FLAG_CRC_ANCILLARY_NOWARN; + break; + + case PNG_CRC_WARN_DISCARD: /* Warn/discard data */ + + case PNG_CRC_DEFAULT: + default: + png_ptr->flags &= ~PNG_FLAG_CRC_ANCILLARY_MASK; + break; + } +} + +#ifdef PNG_READ_BACKGROUND_SUPPORTED +/* Handle alpha and tRNS via a background color */ +void PNGFAPI +png_set_background_fixed(png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, png_fixed_point background_gamma) +{ + png_debug(1, "in png_set_background_fixed"); + + if (png_ptr == NULL) + return; + + if (background_gamma_code == PNG_BACKGROUND_GAMMA_UNKNOWN) + { + png_warning(png_ptr, "Application must supply a known background gamma"); + return; + } + + png_ptr->transformations |= PNG_COMPOSE | PNG_STRIP_ALPHA; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + + png_memcpy(&(png_ptr->background), background_color, + png_sizeof(png_color_16)); + png_ptr->background_gamma = background_gamma; + png_ptr->background_gamma_type = (png_byte)(background_gamma_code); + if (need_expand) + png_ptr->transformations |= PNG_BACKGROUND_EXPAND; + else + png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_background(png_structp png_ptr, + png_const_color_16p background_color, int background_gamma_code, + int need_expand, double background_gamma) +{ + png_set_background_fixed(png_ptr, background_color, background_gamma_code, + need_expand, png_fixed(png_ptr, background_gamma, "png_set_background")); +} +# endif /* FLOATING_POINT */ +#endif /* READ_BACKGROUND */ + +/* Scale 16-bit depth files to 8-bit depth. If both of these are set then the + * one that pngrtran does first (scale) happens. This is necessary to allow the + * TRANSFORM and API behavior to be somewhat consistent, and it's simpler. + */ +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +void PNGAPI +png_set_scale_16(png_structp png_ptr) +{ + png_debug(1, "in png_set_scale_16"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_SCALE_16_TO_8; +} +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +/* Chop 16-bit depth files to 8-bit depth */ +void PNGAPI +png_set_strip_16(png_structp png_ptr) +{ + png_debug(1, "in png_set_strip_16"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_16_TO_8; +} +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED +void PNGAPI +png_set_strip_alpha(png_structp png_ptr) +{ + png_debug(1, "in png_set_strip_alpha"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_STRIP_ALPHA; +} +#endif + +#if defined(PNG_READ_ALPHA_MODE_SUPPORTED) || defined(PNG_READ_GAMMA_SUPPORTED) +static png_fixed_point +translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma, + int is_screen) +{ + /* Check for flag values. The main reason for having the old Mac value as a + * flag is that it is pretty near impossible to work out what the correct + * value is from Apple documentation - a working Mac system is needed to + * discover the value! + */ + if (output_gamma == PNG_DEFAULT_sRGB || + output_gamma == PNG_FP_1 / PNG_DEFAULT_sRGB) + { + /* If there is no sRGB support this just sets the gamma to the standard + * sRGB value. (This is a side effect of using this function!) + */ +# ifdef PNG_READ_sRGB_SUPPORTED + png_ptr->flags |= PNG_FLAG_ASSUME_sRGB; +# endif + if (is_screen) + output_gamma = PNG_GAMMA_sRGB; + else + output_gamma = PNG_GAMMA_sRGB_INVERSE; + } + + else if (output_gamma == PNG_GAMMA_MAC_18 || + output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18) + { + if (is_screen) + output_gamma = PNG_GAMMA_MAC_OLD; + else + output_gamma = PNG_GAMMA_MAC_INVERSE; + } + + return output_gamma; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +static png_fixed_point +convert_gamma_value(png_structp png_ptr, double output_gamma) +{ + /* The following silently ignores cases where fixed point (times 100,000) + * gamma values are passed to the floating point API. This is safe and it + * means the fixed point constants work just fine with the floating point + * API. The alternative would just lead to undetected errors and spurious + * bug reports. Negative values fail inside the _fixed API unless they + * correspond to the flag values. + */ + if (output_gamma > 0 && output_gamma < 128) + output_gamma *= PNG_FP_1; + + /* This preserves -1 and -2 exactly: */ + output_gamma = floor(output_gamma + .5); + + if (output_gamma > PNG_FP_MAX || output_gamma < PNG_FP_MIN) + png_fixed_error(png_ptr, "gamma value"); + + return (png_fixed_point)output_gamma; +} +# endif +#endif /* READ_ALPHA_MODE || READ_GAMMA */ + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +void PNGFAPI +png_set_alpha_mode_fixed(png_structp png_ptr, int mode, + png_fixed_point output_gamma) +{ + int compose = 0; + png_fixed_point file_gamma; + + png_debug(1, "in png_set_alpha_mode"); + + if (png_ptr == NULL) + return; + + output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/); + + /* Validate the value to ensure it is in a reasonable range. The value + * is expected to be 1 or greater, but this range test allows for some + * viewing correction values. The intent is to weed out users of this API + * who use the inverse of the gamma value accidentally! Since some of these + * values are reasonable this may have to be changed. + */ + if (output_gamma < 70000 || output_gamma > 300000) + png_error(png_ptr, "output gamma out of expected range"); + + /* The default file gamma is the inverse of the output gamma; the output + * gamma may be changed below so get the file value first: + */ + file_gamma = png_reciprocal(output_gamma); + + /* There are really 8 possibilities here, composed of any combination + * of: + * + * premultiply the color channels + * do not encode non-opaque pixels + * encode the alpha as well as the color channels + * + * The differences disappear if the input/output ('screen') gamma is 1.0, + * because then the encoding is a no-op and there is only the choice of + * premultiplying the color channels or not. + * + * png_set_alpha_mode and png_set_background interact because both use + * png_compose to do the work. Calling both is only useful when + * png_set_alpha_mode is used to set the default mode - PNG_ALPHA_PNG - along + * with a default gamma value. Otherwise PNG_COMPOSE must not be set. + */ + switch (mode) + { + case PNG_ALPHA_PNG: /* default: png standard */ + /* No compose, but it may be set by png_set_background! */ + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + break; + + case PNG_ALPHA_ASSOCIATED: /* color channels premultiplied */ + compose = 1; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + /* The output is linear: */ + output_gamma = PNG_FP_1; + break; + + case PNG_ALPHA_OPTIMIZED: /* associated, non-opaque pixels linear */ + compose = 1; + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags |= PNG_FLAG_OPTIMIZE_ALPHA; + /* output_gamma records the encoding of opaque pixels! */ + break; + + case PNG_ALPHA_BROKEN: /* associated, non-linear, alpha encoded */ + compose = 1; + png_ptr->transformations |= PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + break; + + default: + png_error(png_ptr, "invalid alpha mode"); + } + + /* Only set the default gamma if the file gamma has not been set (this has + * the side effect that the gamma in a second call to png_set_alpha_mode will + * be ignored.) + */ + if (png_ptr->gamma == 0) + png_ptr->gamma = file_gamma; + + /* But always set the output gamma: */ + png_ptr->screen_gamma = output_gamma; + + /* Finally, if pre-multiplying, set the background fields to achieve the + * desired result. + */ + if (compose) + { + /* And obtain alpha pre-multiplication by composing on black: */ + png_memset(&png_ptr->background, 0, sizeof png_ptr->background); + png_ptr->background_gamma = png_ptr->gamma; /* just in case */ + png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_FILE; + png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND; + + if (png_ptr->transformations & PNG_COMPOSE) + png_error(png_ptr, + "conflicting calls to set alpha mode and background"); + + png_ptr->transformations |= PNG_COMPOSE; + } + + /* New API, make sure apps call the correct initializers: */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_alpha_mode(png_structp png_ptr, int mode, double output_gamma) +{ + png_set_alpha_mode_fixed(png_ptr, mode, convert_gamma_value(png_ptr, + output_gamma)); +} +# endif +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +/* Dither file to 8-bit. Supply a palette, the current number + * of elements in the palette, the maximum number of elements + * allowed, and a histogram if possible. If the current number + * of colors is greater then the maximum number, the palette will be + * modified to fit in the maximum number. "full_quantize" indicates + * whether we need a quantizing cube set up for RGB images, or if we + * simply are reducing the number of colors in a paletted image. + */ + +typedef struct png_dsort_struct +{ + struct png_dsort_struct FAR * next; + png_byte left; + png_byte right; +} png_dsort; +typedef png_dsort FAR * png_dsortp; +typedef png_dsort FAR * FAR * png_dsortpp; + +void PNGAPI +png_set_quantize(png_structp png_ptr, png_colorp palette, + int num_palette, int maximum_colors, png_const_uint_16p histogram, + int full_quantize) +{ + png_debug(1, "in png_set_quantize"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_QUANTIZE; + + if (!full_quantize) + { + int i; + + png_ptr->quantize_index = (png_bytep)png_malloc(png_ptr, + (png_uint_32)(num_palette * png_sizeof(png_byte))); + for (i = 0; i < num_palette; i++) + png_ptr->quantize_index[i] = (png_byte)i; + } + + if (num_palette > maximum_colors) + { + if (histogram != NULL) + { + /* This is easy enough, just throw out the least used colors. + * Perhaps not the best solution, but good enough. + */ + + int i; + + /* Initialize an array to sort colors */ + png_ptr->quantize_sort = (png_bytep)png_malloc(png_ptr, + (png_uint_32)(num_palette * png_sizeof(png_byte))); + + /* Initialize the quantize_sort array */ + for (i = 0; i < num_palette; i++) + png_ptr->quantize_sort[i] = (png_byte)i; + + /* Find the least used palette entries by starting a + * bubble sort, and running it until we have sorted + * out enough colors. Note that we don't care about + * sorting all the colors, just finding which are + * least used. + */ + + for (i = num_palette - 1; i >= maximum_colors; i--) + { + int done; /* To stop early if the list is pre-sorted */ + int j; + + done = 1; + for (j = 0; j < i; j++) + { + if (histogram[png_ptr->quantize_sort[j]] + < histogram[png_ptr->quantize_sort[j + 1]]) + { + png_byte t; + + t = png_ptr->quantize_sort[j]; + png_ptr->quantize_sort[j] = png_ptr->quantize_sort[j + 1]; + png_ptr->quantize_sort[j + 1] = t; + done = 0; + } + } + + if (done) + break; + } + + /* Swap the palette around, and set up a table, if necessary */ + if (full_quantize) + { + int j = num_palette; + + /* Put all the useful colors within the max, but don't + * move the others. + */ + for (i = 0; i < maximum_colors; i++) + { + if ((int)png_ptr->quantize_sort[i] >= maximum_colors) + { + do + j--; + while ((int)png_ptr->quantize_sort[j] >= maximum_colors); + + palette[i] = palette[j]; + } + } + } + else + { + int j = num_palette; + + /* Move all the used colors inside the max limit, and + * develop a translation table. + */ + for (i = 0; i < maximum_colors; i++) + { + /* Only move the colors we need to */ + if ((int)png_ptr->quantize_sort[i] >= maximum_colors) + { + png_color tmp_color; + + do + j--; + while ((int)png_ptr->quantize_sort[j] >= maximum_colors); + + tmp_color = palette[j]; + palette[j] = palette[i]; + palette[i] = tmp_color; + /* Indicate where the color went */ + png_ptr->quantize_index[j] = (png_byte)i; + png_ptr->quantize_index[i] = (png_byte)j; + } + } + + /* Find closest color for those colors we are not using */ + for (i = 0; i < num_palette; i++) + { + if ((int)png_ptr->quantize_index[i] >= maximum_colors) + { + int min_d, k, min_k, d_index; + + /* Find the closest color to one we threw out */ + d_index = png_ptr->quantize_index[i]; + min_d = PNG_COLOR_DIST(palette[d_index], palette[0]); + for (k = 1, min_k = 0; k < maximum_colors; k++) + { + int d; + + d = PNG_COLOR_DIST(palette[d_index], palette[k]); + + if (d < min_d) + { + min_d = d; + min_k = k; + } + } + /* Point to closest color */ + png_ptr->quantize_index[i] = (png_byte)min_k; + } + } + } + png_free(png_ptr, png_ptr->quantize_sort); + png_ptr->quantize_sort = NULL; + } + else + { + /* This is much harder to do simply (and quickly). Perhaps + * we need to go through a median cut routine, but those + * don't always behave themselves with only a few colors + * as input. So we will just find the closest two colors, + * and throw out one of them (chosen somewhat randomly). + * [We don't understand this at all, so if someone wants to + * work on improving it, be our guest - AED, GRP] + */ + int i; + int max_d; + int num_new_palette; + png_dsortp t; + png_dsortpp hash; + + t = NULL; + + /* Initialize palette index arrays */ + png_ptr->index_to_palette = (png_bytep)png_malloc(png_ptr, + (png_uint_32)(num_palette * png_sizeof(png_byte))); + png_ptr->palette_to_index = (png_bytep)png_malloc(png_ptr, + (png_uint_32)(num_palette * png_sizeof(png_byte))); + + /* Initialize the sort array */ + for (i = 0; i < num_palette; i++) + { + png_ptr->index_to_palette[i] = (png_byte)i; + png_ptr->palette_to_index[i] = (png_byte)i; + } + + hash = (png_dsortpp)png_calloc(png_ptr, (png_uint_32)(769 * + png_sizeof(png_dsortp))); + + num_new_palette = num_palette; + + /* Initial wild guess at how far apart the farthest pixel + * pair we will be eliminating will be. Larger + * numbers mean more areas will be allocated, Smaller + * numbers run the risk of not saving enough data, and + * having to do this all over again. + * + * I have not done extensive checking on this number. + */ + max_d = 96; + + while (num_new_palette > maximum_colors) + { + for (i = 0; i < num_new_palette - 1; i++) + { + int j; + + for (j = i + 1; j < num_new_palette; j++) + { + int d; + + d = PNG_COLOR_DIST(palette[i], palette[j]); + + if (d <= max_d) + { + + t = (png_dsortp)png_malloc_warn(png_ptr, + (png_uint_32)(png_sizeof(png_dsort))); + + if (t == NULL) + break; + + t->next = hash[d]; + t->left = (png_byte)i; + t->right = (png_byte)j; + hash[d] = t; + } + } + if (t == NULL) + break; + } + + if (t != NULL) + for (i = 0; i <= max_d; i++) + { + if (hash[i] != NULL) + { + png_dsortp p; + + for (p = hash[i]; p; p = p->next) + { + if ((int)png_ptr->index_to_palette[p->left] + < num_new_palette && + (int)png_ptr->index_to_palette[p->right] + < num_new_palette) + { + int j, next_j; + + if (num_new_palette & 0x01) + { + j = p->left; + next_j = p->right; + } + else + { + j = p->right; + next_j = p->left; + } + + num_new_palette--; + palette[png_ptr->index_to_palette[j]] + = palette[num_new_palette]; + if (!full_quantize) + { + int k; + + for (k = 0; k < num_palette; k++) + { + if (png_ptr->quantize_index[k] == + png_ptr->index_to_palette[j]) + png_ptr->quantize_index[k] = + png_ptr->index_to_palette[next_j]; + + if ((int)png_ptr->quantize_index[k] == + num_new_palette) + png_ptr->quantize_index[k] = + png_ptr->index_to_palette[j]; + } + } + + png_ptr->index_to_palette[png_ptr->palette_to_index + [num_new_palette]] = png_ptr->index_to_palette[j]; + + png_ptr->palette_to_index[png_ptr->index_to_palette[j]] + = png_ptr->palette_to_index[num_new_palette]; + + png_ptr->index_to_palette[j] = + (png_byte)num_new_palette; + + png_ptr->palette_to_index[num_new_palette] = + (png_byte)j; + } + if (num_new_palette <= maximum_colors) + break; + } + if (num_new_palette <= maximum_colors) + break; + } + } + + for (i = 0; i < 769; i++) + { + if (hash[i] != NULL) + { + png_dsortp p = hash[i]; + while (p) + { + t = p->next; + png_free(png_ptr, p); + p = t; + } + } + hash[i] = 0; + } + max_d += 96; + } + png_free(png_ptr, hash); + png_free(png_ptr, png_ptr->palette_to_index); + png_free(png_ptr, png_ptr->index_to_palette); + png_ptr->palette_to_index = NULL; + png_ptr->index_to_palette = NULL; + } + num_palette = maximum_colors; + } + if (png_ptr->palette == NULL) + { + png_ptr->palette = palette; + } + png_ptr->num_palette = (png_uint_16)num_palette; + + if (full_quantize) + { + int i; + png_bytep distance; + int total_bits = PNG_QUANTIZE_RED_BITS + PNG_QUANTIZE_GREEN_BITS + + PNG_QUANTIZE_BLUE_BITS; + int num_red = (1 << PNG_QUANTIZE_RED_BITS); + int num_green = (1 << PNG_QUANTIZE_GREEN_BITS); + int num_blue = (1 << PNG_QUANTIZE_BLUE_BITS); + png_size_t num_entries = ((png_size_t)1 << total_bits); + + png_ptr->palette_lookup = (png_bytep)png_calloc(png_ptr, + (png_uint_32)(num_entries * png_sizeof(png_byte))); + + distance = (png_bytep)png_malloc(png_ptr, (png_uint_32)(num_entries * + png_sizeof(png_byte))); + + png_memset(distance, 0xff, num_entries * png_sizeof(png_byte)); + + for (i = 0; i < num_palette; i++) + { + int ir, ig, ib; + int r = (palette[i].red >> (8 - PNG_QUANTIZE_RED_BITS)); + int g = (palette[i].green >> (8 - PNG_QUANTIZE_GREEN_BITS)); + int b = (palette[i].blue >> (8 - PNG_QUANTIZE_BLUE_BITS)); + + for (ir = 0; ir < num_red; ir++) + { + /* int dr = abs(ir - r); */ + int dr = ((ir > r) ? ir - r : r - ir); + int index_r = (ir << (PNG_QUANTIZE_BLUE_BITS + + PNG_QUANTIZE_GREEN_BITS)); + + for (ig = 0; ig < num_green; ig++) + { + /* int dg = abs(ig - g); */ + int dg = ((ig > g) ? ig - g : g - ig); + int dt = dr + dg; + int dm = ((dr > dg) ? dr : dg); + int index_g = index_r | (ig << PNG_QUANTIZE_BLUE_BITS); + + for (ib = 0; ib < num_blue; ib++) + { + int d_index = index_g | ib; + /* int db = abs(ib - b); */ + int db = ((ib > b) ? ib - b : b - ib); + int dmax = ((dm > db) ? dm : db); + int d = dmax + dt + db; + + if (d < (int)distance[d_index]) + { + distance[d_index] = (png_byte)d; + png_ptr->palette_lookup[d_index] = (png_byte)i; + } + } + } + } + } + + png_free(png_ptr, distance); + } +} +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ + +#ifdef PNG_READ_GAMMA_SUPPORTED +void PNGFAPI +png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma, + png_fixed_point file_gamma) +{ + png_debug(1, "in png_set_gamma_fixed"); + + if (png_ptr == NULL) + return; + + /* New in libpng-1.5.4 - reserve particular negative values as flags. */ + scrn_gamma = translate_gamma_flags(png_ptr, scrn_gamma, 1/*screen*/); + file_gamma = translate_gamma_flags(png_ptr, file_gamma, 0/*file*/); + +#if PNG_LIBPNG_VER >= 10600 + /* Checking the gamma values for being >0 was added in 1.5.4 along with the + * premultiplied alpha support; this actually hides an undocumented feature + * of the previous implementation which allowed gamma processing to be + * disabled in background handling. There is no evidence (so far) that this + * was being used; however, png_set_background itself accepted and must still + * accept '0' for the gamma value it takes, because it isn't always used. + * + * Since this is an API change (albeit a very minor one that removes an + * undocumented API feature) it will not be made until libpng-1.6.0. + */ + if (file_gamma <= 0) + png_error(png_ptr, "invalid file gamma in png_set_gamma"); + + if (scrn_gamma <= 0) + png_error(png_ptr, "invalid screen gamma in png_set_gamma"); +#endif + + /* Set the gamma values unconditionally - this overrides the value in the PNG + * file if a gAMA chunk was present. png_set_alpha_mode provides a + * different, easier, way to default the file gamma. + */ + png_ptr->gamma = file_gamma; + png_ptr->screen_gamma = scrn_gamma; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma) +{ + png_set_gamma_fixed(png_ptr, convert_gamma_value(png_ptr, scrn_gamma), + convert_gamma_value(png_ptr, file_gamma)); +} +# endif /* FLOATING_POINT_SUPPORTED */ +#endif /* READ_GAMMA */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* Expand paletted images to RGB, expand grayscale images of + * less than 8-bit depth to 8-bit depth, and expand tRNS chunks + * to alpha channels. + */ +void PNGAPI +png_set_expand(png_structp png_ptr) +{ + png_debug(1, "in png_set_expand"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; +} + +/* GRR 19990627: the following three functions currently are identical + * to png_set_expand(). However, it is entirely reasonable that someone + * might wish to expand an indexed image to RGB but *not* expand a single, + * fully transparent palette entry to a full alpha channel--perhaps instead + * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace + * the transparent color with a particular RGB value, or drop tRNS entirely. + * IOW, a future version of the library may make the transformations flag + * a bit more fine-grained, with separate bits for each of these three + * functions. + * + * More to the point, these functions make it obvious what libpng will be + * doing, whereas "expand" can (and does) mean any number of things. + * + * GRP 20060307: In libpng-1.2.9, png_set_gray_1_2_4_to_8() was modified + * to expand only the sample depth but not to expand the tRNS to alpha + * and its name was changed to png_set_expand_gray_1_2_4_to_8(). + */ + +/* Expand paletted images to RGB. */ +void PNGAPI +png_set_palette_to_rgb(png_structp png_ptr) +{ + png_debug(1, "in png_set_palette_to_rgb"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; +} + +/* Expand grayscale images of less than 8-bit depth to 8 bits. */ +void PNGAPI +png_set_expand_gray_1_2_4_to_8(png_structp png_ptr) +{ + png_debug(1, "in png_set_expand_gray_1_2_4_to_8"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_EXPAND; + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; +} + + + +/* Expand tRNS chunks to alpha channels. */ +void PNGAPI +png_set_tRNS_to_alpha(png_structp png_ptr) +{ + png_debug(1, "in png_set_tRNS_to_alpha"); + + png_ptr->transformations |= (PNG_EXPAND | PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; +} +#endif /* defined(PNG_READ_EXPAND_SUPPORTED) */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise + * it may not work correctly.) + */ +void PNGAPI +png_set_expand_16(png_structp png_ptr) +{ + png_debug(1, "in png_set_expand_16"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= (PNG_EXPAND_16 | PNG_EXPAND | PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; + + /* New API, make sure apps call the correct initializers: */ + png_ptr->flags |= PNG_FLAG_DETECT_UNINITIALIZED; +} +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +void PNGAPI +png_set_gray_to_rgb(png_structp png_ptr) +{ + png_debug(1, "in png_set_gray_to_rgb"); + + if (png_ptr != NULL) + { + /* Because rgb must be 8 bits or more: */ + png_set_expand_gray_1_2_4_to_8(png_ptr); + png_ptr->transformations |= PNG_GRAY_TO_RGB; + png_ptr->flags &= ~PNG_FLAG_ROW_INIT; + } +} +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +void PNGFAPI +png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action, + png_fixed_point red, png_fixed_point green) +{ + png_debug(1, "in png_set_rgb_to_gray"); + + if (png_ptr == NULL) + return; + + switch(error_action) + { + case PNG_ERROR_ACTION_NONE: + png_ptr->transformations |= PNG_RGB_TO_GRAY; + break; + + case PNG_ERROR_ACTION_WARN: + png_ptr->transformations |= PNG_RGB_TO_GRAY_WARN; + break; + + case PNG_ERROR_ACTION_ERROR: + png_ptr->transformations |= PNG_RGB_TO_GRAY_ERR; + break; + + default: + png_error(png_ptr, "invalid error action to rgb_to_gray"); + break; + } + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) +#ifdef PNG_READ_EXPAND_SUPPORTED + png_ptr->transformations |= PNG_EXPAND; +#else + { + png_warning(png_ptr, + "Cannot do RGB_TO_GRAY without EXPAND_SUPPORTED"); + + png_ptr->transformations &= ~PNG_RGB_TO_GRAY; + } +#endif + { + if (red >= 0 && green >= 0 && red + green <= PNG_FP_1) + { + png_uint_16 red_int, green_int; + + /* NOTE: this calculation does not round, but this behavior is retained + * for consistency, the inaccuracy is very small. The code here always + * overwrites the coefficients, regardless of whether they have been + * defaulted or set already. + */ + red_int = (png_uint_16)(((png_uint_32)red*32768)/100000); + green_int = (png_uint_16)(((png_uint_32)green*32768)/100000); + + png_ptr->rgb_to_gray_red_coeff = red_int; + png_ptr->rgb_to_gray_green_coeff = green_int; + png_ptr->rgb_to_gray_coefficients_set = 1; + } + + else + { + if (red >= 0 && green >= 0) + png_warning(png_ptr, + "ignoring out of range rgb_to_gray coefficients"); + + /* Use the defaults, from the cHRM chunk if set, else the historical + * values which are close to the sRGB/HDTV/ITU-Rec 709 values. See + * png_do_rgb_to_gray for more discussion of the values. In this case + * the coefficients are not marked as 'set' and are not overwritten if + * something has already provided a default. + */ + if (png_ptr->rgb_to_gray_red_coeff == 0 && + png_ptr->rgb_to_gray_green_coeff == 0) + { + png_ptr->rgb_to_gray_red_coeff = 6968; + png_ptr->rgb_to_gray_green_coeff = 23434; + /* png_ptr->rgb_to_gray_blue_coeff = 2366; */ + } + } + } +} + +#ifdef PNG_FLOATING_POINT_SUPPORTED +/* Convert a RGB image to a grayscale of the same width. This allows us, + * for example, to convert a 24 bpp RGB image into an 8 bpp grayscale image. + */ + +void PNGAPI +png_set_rgb_to_gray(png_structp png_ptr, int error_action, double red, + double green) +{ + if (png_ptr == NULL) + return; + + png_set_rgb_to_gray_fixed(png_ptr, error_action, + png_fixed(png_ptr, red, "rgb to gray red coefficient"), + png_fixed(png_ptr, green, "rgb to gray green coefficient")); +} +#endif /* FLOATING POINT */ + +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +void PNGAPI +png_set_read_user_transform_fn(png_structp png_ptr, png_user_transform_ptr + read_user_transform_fn) +{ + png_debug(1, "in png_set_read_user_transform_fn"); + + if (png_ptr == NULL) + return; + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + png_ptr->transformations |= PNG_USER_TRANSFORM; + png_ptr->read_user_transform_fn = read_user_transform_fn; +#endif +} +#endif + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +#ifdef PNG_READ_GAMMA_SUPPORTED +/* In the case of gamma transformations only do transformations on images where + * the [file] gamma and screen_gamma are not close reciprocals, otherwise it + * slows things down slightly, and also needlessly introduces small errors. + */ +static int /* PRIVATE */ +png_gamma_threshold(png_fixed_point screen_gamma, png_fixed_point file_gamma) +{ + /* PNG_GAMMA_THRESHOLD is the threshold for performing gamma + * correction as a difference of the overall transform from 1.0 + * + * We want to compare the threshold with s*f - 1, if we get + * overflow here it is because of wacky gamma values so we + * turn on processing anyway. + */ + png_fixed_point gtest; + return !png_muldiv(>est, screen_gamma, file_gamma, PNG_FP_1) || + png_gamma_significant(gtest); +} +#endif + +/* Initialize everything needed for the read. This includes modifying + * the palette. + */ + +/*For the moment 'png_init_palette_transformations' and + * 'png_init_rgb_transformations' only do some flag canceling optimizations. + * The intent is that these two routines should have palette or rgb operations + * extracted from 'png_init_read_transformations'. + */ +static void /* PRIVATE */ +png_init_palette_transformations(png_structp png_ptr) +{ + /* Called to handle the (input) palette case. In png_do_read_transformations + * the first step is to expand the palette if requested, so this code must + * take care to only make changes that are invariant with respect to the + * palette expansion, or only do them if there is no expansion. + * + * STRIP_ALPHA has already been handled in the caller (by setting num_trans + * to 0.) + */ + int input_has_alpha = 0; + int input_has_transparency = 0; + + if (png_ptr->num_trans > 0) + { + int i; + + /* Ignore if all the entries are opaque (unlikely!) */ + for (i=0; inum_trans; ++i) + if (png_ptr->trans_alpha[i] == 255) + continue; + else if (png_ptr->trans_alpha[i] == 0) + input_has_transparency = 1; + else + input_has_alpha = 1; + } + + /* If no alpha we can optimize. */ + if (!input_has_alpha) + { + /* Any alpha means background and associative alpha processing is + * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * and ENCODE_ALPHA are irrelevant. + */ + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + + if (!input_has_transparency) + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); + } + +#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) + /* png_set_background handling - deals with the complexity of whether the + * background color is in the file format or the screen format in the case + * where an 'expand' will happen. + */ + + /* The following code cannot be entered in the alpha pre-multiplication case + * because PNG_BACKGROUND_EXPAND is cancelled below. + */ + if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && + (png_ptr->transformations & PNG_EXPAND)) + { + { + png_ptr->background.red = + png_ptr->palette[png_ptr->background.index].red; + png_ptr->background.green = + png_ptr->palette[png_ptr->background.index].green; + png_ptr->background.blue = + png_ptr->palette[png_ptr->background.index].blue; + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_ALPHA) + { + if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + { + /* Invert the alpha channel (in tRNS) unless the pixels are + * going to be expanded, in which case leave it for later + */ + int i, istop = png_ptr->num_trans; + + for (i=0; itrans_alpha[i] = (png_byte)(255 - + png_ptr->trans_alpha[i]); + } + } +#endif /* PNG_READ_INVERT_ALPHA_SUPPORTED */ + } + } /* background expand and (therefore) no alpha association. */ +#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +} + +static void /* PRIVATE */ +png_init_rgb_transformations(png_structp png_ptr) +{ + /* Added to libpng-1.5.4: check the color type to determine whether there + * is any alpha or transparency in the image and simply cancel the + * background and alpha mode stuff if there isn't. + */ + int input_has_alpha = (png_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0; + int input_has_transparency = png_ptr->num_trans > 0; + + /* If no alpha we can optimize. */ + if (!input_has_alpha) + { + /* Any alpha means background and associative alpha processing is + * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA + * and ENCODE_ALPHA are irrelevant. + */ +# ifdef PNG_READ_ALPHA_MODE_SUPPORTED + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; +# endif + + if (!input_has_transparency) + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND); + } + +#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED) + /* png_set_background handling - deals with the complexity of whether the + * background color is in the file format or the screen format in the case + * where an 'expand' will happen. + */ + + /* The following code cannot be entered in the alpha pre-multiplication case + * because PNG_BACKGROUND_EXPAND is cancelled below. + */ + if ((png_ptr->transformations & PNG_BACKGROUND_EXPAND) && + (png_ptr->transformations & PNG_EXPAND) && + !(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + /* i.e., GRAY or GRAY_ALPHA */ + { + { + /* Expand background and tRNS chunks */ + int gray = png_ptr->background.gray; + int trans_gray = png_ptr->trans_color.gray; + + switch (png_ptr->bit_depth) + { + case 1: + gray *= 0xff; + trans_gray *= 0xff; + break; + + case 2: + gray *= 0x55; + trans_gray *= 0x55; + break; + + case 4: + gray *= 0x11; + trans_gray *= 0x11; + break; + + default: + + case 8: + /* Already 8 bits, fall through */ + + case 16: + /* Already a full 16 bits */ + break; + } + + png_ptr->background.red = png_ptr->background.green = + png_ptr->background.blue = (png_uint_16)gray; + + if (!(png_ptr->transformations & PNG_EXPAND_tRNS)) + { + png_ptr->trans_color.red = png_ptr->trans_color.green = + png_ptr->trans_color.blue = (png_uint_16)trans_gray; + } + } + } /* background expand and (therefore) no alpha association. */ +#endif /* PNG_READ_EXPAND_SUPPORTED && PNG_READ_BACKGROUND_SUPPORTED */ +} + +void /* PRIVATE */ +png_init_read_transformations(png_structp png_ptr) +{ + png_debug(1, "in png_init_read_transformations"); + + /* This internal function is called from png_read_start_row in pngrutil.c + * and it is called before the 'rowbytes' calculation is done, so the code + * in here can change or update the transformations flags. + * + * First do updates that do not depend on the details of the PNG image data + * being processed. + */ + +#ifdef PNG_READ_GAMMA_SUPPORTED + /* Prior to 1.5.4 these tests were performed from png_set_gamma, 1.5.4 adds + * png_set_alpha_mode and this is another source for a default file gamma so + * the test needs to be performed later - here. In addition prior to 1.5.4 + * the tests were repeated for the PALETTE color type here - this is no + * longer necessary (and doesn't seem to have been necessary before.) + */ + { + /* The following temporary indicates if overall gamma correction is + * required. + */ + int gamma_correction = 0; + + if (png_ptr->gamma != 0) /* has been set */ + { + if (png_ptr->screen_gamma != 0) /* screen set too */ + gamma_correction = png_gamma_threshold(png_ptr->gamma, + png_ptr->screen_gamma); + + else + /* Assume the output matches the input; a long time default behavior + * of libpng, although the standard has nothing to say about this. + */ + png_ptr->screen_gamma = png_reciprocal(png_ptr->gamma); + } + + else if (png_ptr->screen_gamma != 0) + /* The converse - assume the file matches the screen, note that this + * perhaps undesireable default can (from 1.5.4) be changed by calling + * png_set_alpha_mode (even if the alpha handling mode isn't required + * or isn't changed from the default.) + */ + png_ptr->gamma = png_reciprocal(png_ptr->screen_gamma); + + else /* neither are set */ + /* Just in case the following prevents any processing - file and screen + * are both assumed to be linear and there is no way to introduce a + * third gamma value other than png_set_background with 'UNIQUE', and, + * prior to 1.5.4 + */ + png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1; + + /* Now turn the gamma transformation on or off as appropriate. Notice + * that PNG_GAMMA just refers to the file->screen correction. Alpha + * composition may independently cause gamma correction because it needs + * linear data (e.g. if the file has a gAMA chunk but the screen gamma + * hasn't been specified.) In any case this flag may get turned off in + * the code immediately below if the transform can be handled outside the + * row loop. + */ + if (gamma_correction) + png_ptr->transformations |= PNG_GAMMA; + + else + png_ptr->transformations &= ~PNG_GAMMA; + } +#endif + + /* Certain transformations have the effect of preventing other + * transformations that happen afterward in png_do_read_transformations, + * resolve the interdependencies here. From the code of + * png_do_read_transformations the order is: + * + * 1) PNG_EXPAND (including PNG_EXPAND_tRNS) + * 2) PNG_STRIP_ALPHA (if no compose) + * 3) PNG_RGB_TO_GRAY + * 4) PNG_GRAY_TO_RGB iff !PNG_BACKGROUND_IS_GRAY + * 5) PNG_COMPOSE + * 6) PNG_GAMMA + * 7) PNG_STRIP_ALPHA (if compose) + * 8) PNG_ENCODE_ALPHA + * 9) PNG_SCALE_16_TO_8 + * 10) PNG_16_TO_8 + * 11) PNG_QUANTIZE (converts to palette) + * 12) PNG_EXPAND_16 + * 13) PNG_GRAY_TO_RGB iff PNG_BACKGROUND_IS_GRAY + * 14) PNG_INVERT_MONO + * 15) PNG_SHIFT + * 16) PNG_PACK + * 17) PNG_BGR + * 18) PNG_PACKSWAP + * 19) PNG_FILLER (includes PNG_ADD_ALPHA) + * 20) PNG_INVERT_ALPHA + * 21) PNG_SWAP_ALPHA + * 22) PNG_SWAP_BYTES + * 23) PNG_USER_TRANSFORM [must be last] + */ +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + !(png_ptr->transformations & PNG_COMPOSE)) + { + /* Stripping the alpha channel happens immediately after the 'expand' + * transformations, before all other transformation, so it cancels out + * the alpha handling. It has the side effect negating the effect of + * PNG_EXPAND_tRNS too: + */ + png_ptr->transformations &= ~(PNG_BACKGROUND_EXPAND | PNG_ENCODE_ALPHA | + PNG_EXPAND_tRNS); + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + + /* Kill the tRNS chunk itself too. Prior to 1.5.4 this did not happen + * so transparency information would remain just so long as it wasn't + * expanded. This produces unexpected API changes if the set of things + * that do PNG_EXPAND_tRNS changes (perfectly possible given the + * documentation - which says ask for what you want, accept what you + * get.) This makes the behavior consistent from 1.5.4: + */ + png_ptr->num_trans = 0; + } +#endif /* STRIP_ALPHA supported, no COMPOSE */ + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + /* If the screen gamma is about 1.0 then the OPTIMIZE_ALPHA and ENCODE_ALPHA + * settings will have no effect. + */ + if (!png_gamma_significant(png_ptr->screen_gamma)) + { + png_ptr->transformations &= ~PNG_ENCODE_ALPHA; + png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA; + } +#endif + +#if defined(PNG_READ_EXPAND_SUPPORTED) && \ + defined(PNG_READ_BACKGROUND_SUPPORTED) && \ + defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) + /* Detect gray background and attempt to enable optimization for + * gray --> RGB case. + * + * Note: if PNG_BACKGROUND_EXPAND is set and color_type is either RGB or + * RGB_ALPHA (in which case need_expand is superfluous anyway), the + * background color might actually be gray yet not be flagged as such. + * This is not a problem for the current code, which uses + * PNG_BACKGROUND_IS_GRAY only to decide when to do the + * png_do_gray_to_rgb() transformation. + * + * TODO: this code needs to be revised to avoid the complexity and + * interdependencies. The color type of the background should be recorded in + * png_set_background, along with the bit depth, then the code has a record + * of exactly what color space the background is currently in. + */ + if (png_ptr->transformations & PNG_BACKGROUND_EXPAND) + { + /* PNG_BACKGROUND_EXPAND: the background is in the file color space, so if + * the file was grayscale the background value is gray. + */ + if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) + png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; + } + + else if (png_ptr->transformations & PNG_COMPOSE) + { + /* PNG_COMPOSE: png_set_background was called with need_expand false, + * so the color is in the color space of the output or png_set_alpha_mode + * was called and the color is black. Ignore RGB_TO_GRAY because that + * happens before GRAY_TO_RGB. + */ + if (png_ptr->transformations & PNG_GRAY_TO_RGB) + { + if (png_ptr->background.red == png_ptr->background.green && + png_ptr->background.red == png_ptr->background.blue) + { + png_ptr->mode |= PNG_BACKGROUND_IS_GRAY; + png_ptr->background.gray = png_ptr->background.red; + } + } + } +#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED (etc) */ + + /* For indexed PNG data (PNG_COLOR_TYPE_PALETTE) many of the transformations + * can be performed directly on the palette, and some (such as rgb to gray) + * can be optimized inside the palette. This is particularly true of the + * composite (background and alpha) stuff, which can be pretty much all done + * in the palette even if the result is expanded to RGB or gray afterward. + * + * NOTE: this is Not Yet Implemented, the code behaves as in 1.5.1 and + * earlier and the palette stuff is actually handled on the first row. This + * leads to the reported bug that the palette returned by png_get_PLTE is not + * updated. + */ + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + png_init_palette_transformations(png_ptr); + + else + png_init_rgb_transformations(png_ptr); + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ + defined(PNG_READ_EXPAND_16_SUPPORTED) + if ((png_ptr->transformations & PNG_EXPAND_16) && + (png_ptr->transformations & PNG_COMPOSE) && + !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && + png_ptr->bit_depth != 16) + { + /* TODO: fix this. Because the expand_16 operation is after the compose + * handling the background color must be 8, not 16, bits deep, but the + * application will supply a 16-bit value so reduce it here. + * + * The PNG_BACKGROUND_EXPAND code above does not expand to 16 bits at + * present, so that case is ok (until do_expand_16 is moved.) + * + * NOTE: this discards the low 16 bits of the user supplied background + * color, but until expand_16 works properly there is no choice! + */ +# define CHOP(x) (x)=((png_uint_16)(((png_uint_32)(x)*255+32895) >> 16)) + CHOP(png_ptr->background.red); + CHOP(png_ptr->background.green); + CHOP(png_ptr->background.blue); + CHOP(png_ptr->background.gray); +# undef CHOP + } +#endif /* PNG_READ_BACKGROUND_SUPPORTED && PNG_READ_EXPAND_16_SUPPORTED */ + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) && \ + (defined(PNG_READ_SCALE_16_TO_8_SUPPORTED) || \ + defined(PNG_READ_STRIP_16_TO_8_SUPPORTED)) + if ((png_ptr->transformations & (PNG_16_TO_8|PNG_SCALE_16_TO_8)) && + (png_ptr->transformations & PNG_COMPOSE) && + !(png_ptr->transformations & PNG_BACKGROUND_EXPAND) && + png_ptr->bit_depth == 16) + { + /* On the other hand, if a 16-bit file is to be reduced to 8-bits per + * component this will also happen after PNG_COMPOSE and so the background + * color must be pre-expanded here. + * + * TODO: fix this too. + */ + png_ptr->background.red = (png_uint_16)(png_ptr->background.red * 257); + png_ptr->background.green = + (png_uint_16)(png_ptr->background.green * 257); + png_ptr->background.blue = (png_uint_16)(png_ptr->background.blue * 257); + png_ptr->background.gray = (png_uint_16)(png_ptr->background.gray * 257); + } +#endif + + /* NOTE: below 'PNG_READ_ALPHA_MODE_SUPPORTED' is presumed to also enable the + * background support (see the comments in scripts/pnglibconf.dfa), this + * allows pre-multiplication of the alpha channel to be implemented as + * compositing on black. This is probably sub-optimal and has been done in + * 1.5.4 betas simply to enable external critique and testing (i.e. to + * implement the new API quickly, without lots of internal changes.) + */ + +#ifdef PNG_READ_GAMMA_SUPPORTED +# ifdef PNG_READ_BACKGROUND_SUPPORTED + /* Includes ALPHA_MODE */ + png_ptr->background_1 = png_ptr->background; +# endif + + /* This needs to change - in the palette image case a whole set of tables are + * built when it would be quicker to just calculate the correct value for + * each palette entry directly. Also, the test is too tricky - why check + * PNG_RGB_TO_GRAY if PNG_GAMMA is not set? The answer seems to be that + * PNG_GAMMA is cancelled even if the gamma is known? The test excludes the + * PNG_COMPOSE case, so apparently if there is no *overall* gamma correction + * the gamma tables will not be built even if composition is required on a + * gamma encoded value. + * + * In 1.5.4 this is addressed below by an additional check on the individual + * file gamma - if it is not 1.0 both RGB_TO_GRAY and COMPOSE need the + * tables. + */ + if ((png_ptr->transformations & PNG_GAMMA) + || ((png_ptr->transformations & PNG_RGB_TO_GRAY) + && (png_gamma_significant(png_ptr->gamma) || + png_gamma_significant(png_ptr->screen_gamma))) + || ((png_ptr->transformations & PNG_COMPOSE) + && (png_gamma_significant(png_ptr->gamma) + || png_gamma_significant(png_ptr->screen_gamma) +# ifdef PNG_READ_BACKGROUND_SUPPORTED + || (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_UNIQUE + && png_gamma_significant(png_ptr->background_gamma)) +# endif + )) || ((png_ptr->transformations & PNG_ENCODE_ALPHA) + && png_gamma_significant(png_ptr->screen_gamma)) + ) + { + png_build_gamma_table(png_ptr, png_ptr->bit_depth); + +#ifdef PNG_READ_BACKGROUND_SUPPORTED + if (png_ptr->transformations & PNG_COMPOSE) + { + /* Issue a warning about this combination: because RGB_TO_GRAY is + * optimized to do the gamma transform if present yet do_background has + * to do the same thing if both options are set a + * double-gamma-correction happens. This is true in all versions of + * libpng to date. + */ + if (png_ptr->transformations & PNG_RGB_TO_GRAY) + png_warning(png_ptr, + "libpng does not support gamma+background+rgb_to_gray"); + + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + /* We don't get to here unless there is a tRNS chunk with non-opaque + * entries - see the checking code at the start of this function. + */ + png_color back, back_1; + png_colorp palette = png_ptr->palette; + int num_palette = png_ptr->num_palette; + int i; + if (png_ptr->background_gamma_type == PNG_BACKGROUND_GAMMA_FILE) + { + + back.red = png_ptr->gamma_table[png_ptr->background.red]; + back.green = png_ptr->gamma_table[png_ptr->background.green]; + back.blue = png_ptr->gamma_table[png_ptr->background.blue]; + + back_1.red = png_ptr->gamma_to_1[png_ptr->background.red]; + back_1.green = png_ptr->gamma_to_1[png_ptr->background.green]; + back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue]; + } + else + { + png_fixed_point g, gs; + + switch (png_ptr->background_gamma_type) + { + case PNG_BACKGROUND_GAMMA_SCREEN: + g = (png_ptr->screen_gamma); + gs = PNG_FP_1; + break; + + case PNG_BACKGROUND_GAMMA_FILE: + g = png_reciprocal(png_ptr->gamma); + gs = png_reciprocal2(png_ptr->gamma, + png_ptr->screen_gamma); + break; + + case PNG_BACKGROUND_GAMMA_UNIQUE: + g = png_reciprocal(png_ptr->background_gamma); + gs = png_reciprocal2(png_ptr->background_gamma, + png_ptr->screen_gamma); + break; + default: + g = PNG_FP_1; /* back_1 */ + gs = PNG_FP_1; /* back */ + break; + } + + if (png_gamma_significant(gs)) + { + back.red = png_gamma_8bit_correct(png_ptr->background.red, + gs); + back.green = png_gamma_8bit_correct(png_ptr->background.green, + gs); + back.blue = png_gamma_8bit_correct(png_ptr->background.blue, + gs); + } + + else + { + back.red = (png_byte)png_ptr->background.red; + back.green = (png_byte)png_ptr->background.green; + back.blue = (png_byte)png_ptr->background.blue; + } + + if (png_gamma_significant(g)) + { + back_1.red = png_gamma_8bit_correct(png_ptr->background.red, + g); + back_1.green = png_gamma_8bit_correct( + png_ptr->background.green, g); + back_1.blue = png_gamma_8bit_correct(png_ptr->background.blue, + g); + } + + else + { + back_1.red = (png_byte)png_ptr->background.red; + back_1.green = (png_byte)png_ptr->background.green; + back_1.blue = (png_byte)png_ptr->background.blue; + } + } + + for (i = 0; i < num_palette; i++) + { + if (i < (int)png_ptr->num_trans && + png_ptr->trans_alpha[i] != 0xff) + { + if (png_ptr->trans_alpha[i] == 0) + { + palette[i] = back; + } + else /* if (png_ptr->trans_alpha[i] != 0xff) */ + { + png_byte v, w; + + v = png_ptr->gamma_to_1[palette[i].red]; + png_composite(w, v, png_ptr->trans_alpha[i], back_1.red); + palette[i].red = png_ptr->gamma_from_1[w]; + + v = png_ptr->gamma_to_1[palette[i].green]; + png_composite(w, v, png_ptr->trans_alpha[i], back_1.green); + palette[i].green = png_ptr->gamma_from_1[w]; + + v = png_ptr->gamma_to_1[palette[i].blue]; + png_composite(w, v, png_ptr->trans_alpha[i], back_1.blue); + palette[i].blue = png_ptr->gamma_from_1[w]; + } + } + else + { + palette[i].red = png_ptr->gamma_table[palette[i].red]; + palette[i].green = png_ptr->gamma_table[palette[i].green]; + palette[i].blue = png_ptr->gamma_table[palette[i].blue]; + } + } + + /* Prevent the transformations being done again. + * + * NOTE: this is highly dubious; it removes the transformations in + * place. This seems inconsistent with the general treatment of the + * transformations elsewhere. + */ + png_ptr->transformations &= ~(PNG_COMPOSE | PNG_GAMMA); + } /* color_type == PNG_COLOR_TYPE_PALETTE */ + + /* if (png_ptr->background_gamma_type!=PNG_BACKGROUND_GAMMA_UNKNOWN) */ + else /* color_type != PNG_COLOR_TYPE_PALETTE */ + { + int gs_sig, g_sig; + png_fixed_point g = PNG_FP_1; /* Correction to linear */ + png_fixed_point gs = PNG_FP_1; /* Correction to screen */ + + switch (png_ptr->background_gamma_type) + { + case PNG_BACKGROUND_GAMMA_SCREEN: + g = png_ptr->screen_gamma; + /* gs = PNG_FP_1; */ + break; + + case PNG_BACKGROUND_GAMMA_FILE: + g = png_reciprocal(png_ptr->gamma); + gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma); + break; + + case PNG_BACKGROUND_GAMMA_UNIQUE: + g = png_reciprocal(png_ptr->background_gamma); + gs = png_reciprocal2(png_ptr->background_gamma, + png_ptr->screen_gamma); + break; + + default: + png_error(png_ptr, "invalid background gamma type"); + } + + g_sig = png_gamma_significant(g); + gs_sig = png_gamma_significant(gs); + + if (g_sig) + png_ptr->background_1.gray = png_gamma_correct(png_ptr, + png_ptr->background.gray, g); + + if (gs_sig) + png_ptr->background.gray = png_gamma_correct(png_ptr, + png_ptr->background.gray, gs); + + if ((png_ptr->background.red != png_ptr->background.green) || + (png_ptr->background.red != png_ptr->background.blue) || + (png_ptr->background.red != png_ptr->background.gray)) + { + /* RGB or RGBA with color background */ + if (g_sig) + { + png_ptr->background_1.red = png_gamma_correct(png_ptr, + png_ptr->background.red, g); + + png_ptr->background_1.green = png_gamma_correct(png_ptr, + png_ptr->background.green, g); + + png_ptr->background_1.blue = png_gamma_correct(png_ptr, + png_ptr->background.blue, g); + } + + if (gs_sig) + { + png_ptr->background.red = png_gamma_correct(png_ptr, + png_ptr->background.red, gs); + + png_ptr->background.green = png_gamma_correct(png_ptr, + png_ptr->background.green, gs); + + png_ptr->background.blue = png_gamma_correct(png_ptr, + png_ptr->background.blue, gs); + } + } + + else + { + /* GRAY, GRAY ALPHA, RGB, or RGBA with gray background */ + png_ptr->background_1.red = png_ptr->background_1.green + = png_ptr->background_1.blue = png_ptr->background_1.gray; + + png_ptr->background.red = png_ptr->background.green + = png_ptr->background.blue = png_ptr->background.gray; + } + + /* The background is now in screen gamma: */ + png_ptr->background_gamma_type = PNG_BACKGROUND_GAMMA_SCREEN; + } /* color_type != PNG_COLOR_TYPE_PALETTE */ + }/* png_ptr->transformations & PNG_BACKGROUND */ + + else + /* Transformation does not include PNG_BACKGROUND */ +#endif /* PNG_READ_BACKGROUND_SUPPORTED */ + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* RGB_TO_GRAY needs to have non-gamma-corrected values! */ + && ((png_ptr->transformations & PNG_EXPAND) == 0 || + (png_ptr->transformations & PNG_RGB_TO_GRAY) == 0) +#endif + ) + { + png_colorp palette = png_ptr->palette; + int num_palette = png_ptr->num_palette; + int i; + + /*NOTE: there are other transformations that should probably be in here + * too. + */ + for (i = 0; i < num_palette; i++) + { + palette[i].red = png_ptr->gamma_table[palette[i].red]; + palette[i].green = png_ptr->gamma_table[palette[i].green]; + palette[i].blue = png_ptr->gamma_table[palette[i].blue]; + } + + /* Done the gamma correction. */ + png_ptr->transformations &= ~PNG_GAMMA; + } /* color_type == PALETTE && !PNG_BACKGROUND transformation */ + } +#ifdef PNG_READ_BACKGROUND_SUPPORTED + else +#endif +#endif /* PNG_READ_GAMMA_SUPPORTED */ + +#ifdef PNG_READ_BACKGROUND_SUPPORTED + /* No GAMMA transformation (see the hanging else 4 lines above) */ + if ((png_ptr->transformations & PNG_COMPOSE) && + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) + { + int i; + int istop = (int)png_ptr->num_trans; + png_color back; + png_colorp palette = png_ptr->palette; + + back.red = (png_byte)png_ptr->background.red; + back.green = (png_byte)png_ptr->background.green; + back.blue = (png_byte)png_ptr->background.blue; + + for (i = 0; i < istop; i++) + { + if (png_ptr->trans_alpha[i] == 0) + { + palette[i] = back; + } + + else if (png_ptr->trans_alpha[i] != 0xff) + { + /* The png_composite() macro is defined in png.h */ + png_composite(palette[i].red, palette[i].red, + png_ptr->trans_alpha[i], back.red); + + png_composite(palette[i].green, palette[i].green, + png_ptr->trans_alpha[i], back.green); + + png_composite(palette[i].blue, palette[i].blue, + png_ptr->trans_alpha[i], back.blue); + } + } + + png_ptr->transformations &= ~PNG_COMPOSE; + } +#endif /* PNG_READ_BACKGROUND_SUPPORTED */ + +#ifdef PNG_READ_SHIFT_SUPPORTED + if ((png_ptr->transformations & PNG_SHIFT) && + (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)) + { + int i; + int istop = png_ptr->num_palette; + int shift = 8 - png_ptr->sig_bit.red; + + /* significant bits can be in the range 1 to 7 for a meaninful result, if + * the number of significant bits is 0 then no shift is done (this is an + * error condition which is silently ignored.) + */ + if (shift > 0 && shift < 8) for (i=0; ipalette[i].red; + + component >>= shift; + png_ptr->palette[i].red = (png_byte)component; + } + + shift = 8 - png_ptr->sig_bit.green; + if (shift > 0 && shift < 8) for (i=0; ipalette[i].green; + + component >>= shift; + png_ptr->palette[i].green = (png_byte)component; + } + + shift = 8 - png_ptr->sig_bit.blue; + if (shift > 0 && shift < 8) for (i=0; ipalette[i].blue; + + component >>= shift; + png_ptr->palette[i].blue = (png_byte)component; + } + } +#endif /* PNG_READ_SHIFT_SUPPORTED */ +} + +/* Modify the info structure to reflect the transformations. The + * info should be updated so a PNG file could be written with it, + * assuming the transformations result in valid PNG data. + */ +void /* PRIVATE */ +png_read_transform_info(png_structp png_ptr, png_infop info_ptr) +{ + png_debug(1, "in png_read_transform_info"); + +#ifdef PNG_READ_EXPAND_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND) + { + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + /* This check must match what actually happens in + * png_do_expand_palette; if it ever checks the tRNS chunk to see if + * it is all opaque we must do the same (at present it does not.) + */ + if (png_ptr->num_trans > 0) + info_ptr->color_type = PNG_COLOR_TYPE_RGB_ALPHA; + + else + info_ptr->color_type = PNG_COLOR_TYPE_RGB; + + info_ptr->bit_depth = 8; + info_ptr->num_trans = 0; + } + else + { + if (png_ptr->num_trans) + { + if (png_ptr->transformations & PNG_EXPAND_tRNS) + info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; + } + if (info_ptr->bit_depth < 8) + info_ptr->bit_depth = 8; + + info_ptr->num_trans = 0; + } + } +#endif + +#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + /* The following is almost certainly wrong unless the background value is in + * the screen space! + */ + if (png_ptr->transformations & PNG_COMPOSE) + info_ptr->background = png_ptr->background; +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + /* The following used to be conditional on PNG_GAMMA (prior to 1.5.4), + * however it seems that the code in png_init_read_transformations, which has + * been called before this from png_read_update_info->png_read_start_row + * sometimes does the gamma transform and cancels the flag. + */ + info_ptr->gamma = png_ptr->gamma; +#endif + + if (info_ptr->bit_depth == 16) + { +# ifdef PNG_READ_16BIT_SUPPORTED +# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_SCALE_16_TO_8) + info_ptr->bit_depth = 8; +# endif + +# ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_16_TO_8) + info_ptr->bit_depth = 8; +# endif + +# else + /* No 16 bit support: force chopping 16-bit input down to 8, in this case + * the app program can chose if both APIs are available by setting the + * correct scaling to use. + */ +# ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* For compatibility with previous versions use the strip method by + * default. This code works because if PNG_SCALE_16_TO_8 is already + * set the code below will do that in preference to the chop. + */ + png_ptr->transformations |= PNG_16_TO_8; + info_ptr->bit_depth = 8; +# else + +# ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + png_ptr->transformations |= PNG_SCALE_16_TO_8; + info_ptr->bit_depth = 8; +# else + + CONFIGURATION ERROR: you must enable at least one 16 to 8 method +# endif +# endif +#endif /* !READ_16BIT_SUPPORTED */ + } + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + if (png_ptr->transformations & PNG_GRAY_TO_RGB) + info_ptr->color_type = (png_byte)(info_ptr->color_type | + PNG_COLOR_MASK_COLOR); +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + if (png_ptr->transformations & PNG_RGB_TO_GRAY) + info_ptr->color_type = (png_byte)(info_ptr->color_type & + ~PNG_COLOR_MASK_COLOR); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + if (png_ptr->transformations & PNG_QUANTIZE) + { + if (((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || + (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)) && + png_ptr->palette_lookup && info_ptr->bit_depth == 8) + { + info_ptr->color_type = PNG_COLOR_TYPE_PALETTE; + } + } +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND_16 && info_ptr->bit_depth == 8 && + info_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + { + info_ptr->bit_depth = 16; + } +#endif + +#ifdef PNG_READ_PACK_SUPPORTED + if ((png_ptr->transformations & PNG_PACK) && (info_ptr->bit_depth < 8)) + info_ptr->bit_depth = 8; +#endif + + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + info_ptr->channels = 1; + + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + info_ptr->channels = 3; + + else + info_ptr->channels = 1; + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_STRIP_ALPHA) + { + info_ptr->color_type = (png_byte)(info_ptr->color_type & + ~PNG_COLOR_MASK_ALPHA); + info_ptr->num_trans = 0; + } +#endif + + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + info_ptr->channels++; + +#ifdef PNG_READ_FILLER_SUPPORTED + /* STRIP_ALPHA and FILLER allowed: MASK_ALPHA bit stripped above */ + if ((png_ptr->transformations & PNG_FILLER) && + ((info_ptr->color_type == PNG_COLOR_TYPE_RGB) || + (info_ptr->color_type == PNG_COLOR_TYPE_GRAY))) + { + info_ptr->channels++; + /* If adding a true alpha channel not just filler */ + if (png_ptr->transformations & PNG_ADD_ALPHA) + info_ptr->color_type |= PNG_COLOR_MASK_ALPHA; + } +#endif + +#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) && \ +defined(PNG_READ_USER_TRANSFORM_SUPPORTED) + if (png_ptr->transformations & PNG_USER_TRANSFORM) + { + if (info_ptr->bit_depth < png_ptr->user_transform_depth) + info_ptr->bit_depth = png_ptr->user_transform_depth; + + if (info_ptr->channels < png_ptr->user_transform_channels) + info_ptr->channels = png_ptr->user_transform_channels; + } +#endif + + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * + info_ptr->bit_depth); + + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width); + + /* Adding in 1.5.4: cache the above value in png_struct so that we can later + * check in png_rowbytes that the user buffer won't get overwritten. Note + * that the field is not always set - if png_read_update_info isn't called + * the application has to either not do any transforms or get the calculation + * right itself. + */ + png_ptr->info_rowbytes = info_ptr->rowbytes; + +#ifndef PNG_READ_EXPAND_SUPPORTED + if (png_ptr) + return; +#endif +} + +/* Transform the row. The order of transformations is significant, + * and is very touchy. If you add a transformation, take care to + * decide how it fits in with the other transformations here. + */ +void /* PRIVATE */ +png_do_read_transformations(png_structp png_ptr, png_row_infop row_info) +{ + png_debug(1, "in png_do_read_transformations"); + + if (png_ptr->row_buf == NULL) + { + /* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this + * error is incredibly rare and incredibly easy to debug without this + * information. + */ + png_error(png_ptr, "NULL row buffer"); + } + + /* The following is debugging; prior to 1.5.4 the code was never compiled in; + * in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro + * PNG_WARN_UNINITIALIZED_ROW removed. In 1.5 the new flag is set only for + * selected new APIs to ensure that there is no API change. + */ + if ((png_ptr->flags & PNG_FLAG_DETECT_UNINITIALIZED) != 0 && + !(png_ptr->flags & PNG_FLAG_ROW_INIT)) + { + /* Application has failed to call either png_read_start_image() or + * png_read_update_info() after setting transforms that expand pixels. + * This check added to libpng-1.2.19 (but not enabled until 1.5.4). + */ + png_error(png_ptr, "Uninitialized row"); + } + +#ifdef PNG_READ_EXPAND_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND) + { + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) + { + png_do_expand_palette(row_info, png_ptr->row_buf + 1, + png_ptr->palette, png_ptr->trans_alpha, png_ptr->num_trans); + } + + else + { + if (png_ptr->num_trans && + (png_ptr->transformations & PNG_EXPAND_tRNS)) + png_do_expand(row_info, png_ptr->row_buf + 1, + &(png_ptr->trans_color)); + + else + png_do_expand(row_info, png_ptr->row_buf + 1, + NULL); + } + } +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + !(png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + if (png_ptr->transformations & PNG_RGB_TO_GRAY) + { + int rgb_error = + png_do_rgb_to_gray(png_ptr, row_info, + png_ptr->row_buf + 1); + + if (rgb_error) + { + png_ptr->rgb_to_gray_status=1; + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_WARN) + png_warning(png_ptr, "png_do_rgb_to_gray found nongray pixel"); + + if ((png_ptr->transformations & PNG_RGB_TO_GRAY) == + PNG_RGB_TO_GRAY_ERR) + png_error(png_ptr, "png_do_rgb_to_gray found nongray pixel"); + } + } +#endif + +/* From Andreas Dilger e-mail to png-implement, 26 March 1998: + * + * In most cases, the "simple transparency" should be done prior to doing + * gray-to-RGB, or you will have to test 3x as many bytes to check if a + * pixel is transparent. You would also need to make sure that the + * transparency information is upgraded to RGB. + * + * To summarize, the current flow is: + * - Gray + simple transparency -> compare 1 or 2 gray bytes and composite + * with background "in place" if transparent, + * convert to RGB if necessary + * - Gray + alpha -> composite with gray background and remove alpha bytes, + * convert to RGB if necessary + * + * To support RGB backgrounds for gray images we need: + * - Gray + simple transparency -> convert to RGB + simple transparency, + * compare 3 or 6 bytes and composite with + * background "in place" if transparent + * (3x compare/pixel compared to doing + * composite with gray bkgrnd) + * - Gray + alpha -> convert to RGB + alpha, composite with background and + * remove alpha bytes (3x float + * operations/pixel compared with composite + * on gray background) + * + * Greg's change will do this. The reason it wasn't done before is for + * performance, as this increases the per-pixel operations. If we would check + * in advance if the background was gray or RGB, and position the gray-to-RGB + * transform appropriately, then it would save a lot of work/time. + */ + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /* If gray -> RGB, do so now only if background is non-gray; else do later + * for performance reasons + */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && + !(png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) + if (png_ptr->transformations & PNG_COMPOSE) + png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + if ((png_ptr->transformations & PNG_GAMMA) && +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Because RGB_TO_GRAY does the gamma transform. */ + !(png_ptr->transformations & PNG_RGB_TO_GRAY) && +#endif +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) + /* Because PNG_COMPOSE does the gamma transform if there is something to + * do (if there is an alpha channel or transparency.) + */ + !((png_ptr->transformations & PNG_COMPOSE) && + ((png_ptr->num_trans != 0) || + (png_ptr->color_type & PNG_COLOR_MASK_ALPHA))) && +#endif + /* Because png_init_read_transformations transforms the palette, unless + * RGB_TO_GRAY will do the transform. + */ + (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE)) + png_do_gamma(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED + if ((png_ptr->transformations & PNG_STRIP_ALPHA) && + (png_ptr->transformations & PNG_COMPOSE) && + (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA || + row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA)) + png_do_strip_channel(row_info, png_ptr->row_buf + 1, + 0 /* at_start == false, because SWAP_ALPHA happens later */); +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED + if ((png_ptr->transformations & PNG_ENCODE_ALPHA) && + (row_info->color_type & PNG_COLOR_MASK_ALPHA)) + png_do_encode_alpha(row_info, png_ptr->row_buf + 1, png_ptr); +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED + if (png_ptr->transformations & PNG_SCALE_16_TO_8) + png_do_scale_16_to_8(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED + /* There is no harm in doing both of these because only one has any effect, + * by putting the 'scale' option first if the app asks for scale (either by + * calling the API or in a TRANSFORM flag) this is what happens. + */ + if (png_ptr->transformations & PNG_16_TO_8) + png_do_chop(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + if (png_ptr->transformations & PNG_QUANTIZE) + { + png_do_quantize(row_info, png_ptr->row_buf + 1, + png_ptr->palette_lookup, png_ptr->quantize_index); + + if (row_info->rowbytes == 0) + png_error(png_ptr, "png_do_quantize returned rowbytes=0"); + } +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + /* Do the expansion now, after all the arithmetic has been done. Notice + * that previous transformations can handle the PNG_EXPAND_16 flag if this + * is efficient (particularly true in the case of gamma correction, where + * better accuracy results faster!) + */ + if (png_ptr->transformations & PNG_EXPAND_16) + png_do_expand_16(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + /*NOTE: moved here in 1.5.4 (from much later in this list.) */ + if ((png_ptr->transformations & PNG_GRAY_TO_RGB) && + (png_ptr->mode & PNG_BACKGROUND_IS_GRAY)) + png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_INVERT_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_MONO) + png_do_invert(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED + if (png_ptr->transformations & PNG_SHIFT) + png_do_unshift(row_info, png_ptr->row_buf + 1, + &(png_ptr->shift)); +#endif + +#ifdef PNG_READ_PACK_SUPPORTED + if (png_ptr->transformations & PNG_PACK) + png_do_unpack(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_BGR_SUPPORTED + if (png_ptr->transformations & PNG_BGR) + png_do_bgr(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) + png_do_packswap(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_FILLER_SUPPORTED + if (png_ptr->transformations & PNG_FILLER) + png_do_read_filler(row_info, png_ptr->row_buf + 1, + (png_uint_32)png_ptr->filler, png_ptr->flags); +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_INVERT_ALPHA) + png_do_read_invert_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_ALPHA) + png_do_read_swap_alpha(row_info, png_ptr->row_buf + 1); +#endif + +#ifdef PNG_READ_16BIT_SUPPORTED +#ifdef PNG_READ_SWAP_SUPPORTED + if (png_ptr->transformations & PNG_SWAP_BYTES) + png_do_swap(row_info, png_ptr->row_buf + 1); +#endif +#endif + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + if (png_ptr->transformations & PNG_USER_TRANSFORM) + { + if (png_ptr->read_user_transform_fn != NULL) + (*(png_ptr->read_user_transform_fn)) /* User read transform function */ + (png_ptr, /* png_ptr */ + row_info, /* row_info: */ + /* png_uint_32 width; width of row */ + /* png_size_t rowbytes; number of bytes in row */ + /* png_byte color_type; color type of pixels */ + /* png_byte bit_depth; bit depth of samples */ + /* png_byte channels; number of channels (1-4) */ + /* png_byte pixel_depth; bits per pixel (depth*channels) */ + png_ptr->row_buf + 1); /* start of pixel data for row */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED + if (png_ptr->user_transform_depth) + row_info->bit_depth = png_ptr->user_transform_depth; + + if (png_ptr->user_transform_channels) + row_info->channels = png_ptr->user_transform_channels; +#endif + row_info->pixel_depth = (png_byte)(row_info->bit_depth * + row_info->channels); + + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_info->width); + } +#endif +} + +#ifdef PNG_READ_PACK_SUPPORTED +/* Unpack pixels of 1, 2, or 4 bits per pixel into 1 byte per pixel, + * without changing the actual values. Thus, if you had a row with + * a bit depth of 1, you would end up with bytes that only contained + * the numbers 0 or 1. If you would rather they contain 0 and 255, use + * png_do_shift() after this. + */ +void /* PRIVATE */ +png_do_unpack(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_unpack"); + + if (row_info->bit_depth < 8) + { + png_uint_32 i; + png_uint_32 row_width=row_info->width; + + switch (row_info->bit_depth) + { + case 1: + { + png_bytep sp = row + (png_size_t)((row_width - 1) >> 3); + png_bytep dp = row + (png_size_t)row_width - 1; + png_uint_32 shift = 7 - (int)((row_width + 7) & 0x07); + for (i = 0; i < row_width; i++) + { + *dp = (png_byte)((*sp >> shift) & 0x01); + + if (shift == 7) + { + shift = 0; + sp--; + } + + else + shift++; + + dp--; + } + break; + } + + case 2: + { + + png_bytep sp = row + (png_size_t)((row_width - 1) >> 2); + png_bytep dp = row + (png_size_t)row_width - 1; + png_uint_32 shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); + for (i = 0; i < row_width; i++) + { + *dp = (png_byte)((*sp >> shift) & 0x03); + + if (shift == 6) + { + shift = 0; + sp--; + } + + else + shift += 2; + + dp--; + } + break; + } + + case 4: + { + png_bytep sp = row + (png_size_t)((row_width - 1) >> 1); + png_bytep dp = row + (png_size_t)row_width - 1; + png_uint_32 shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); + for (i = 0; i < row_width; i++) + { + *dp = (png_byte)((*sp >> shift) & 0x0f); + + if (shift == 4) + { + shift = 0; + sp--; + } + + else + shift = 4; + + dp--; + } + break; + } + + default: + break; + } + row_info->bit_depth = 8; + row_info->pixel_depth = (png_byte)(8 * row_info->channels); + row_info->rowbytes = row_width * row_info->channels; + } +} +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED +/* Reverse the effects of png_do_shift. This routine merely shifts the + * pixels back to their significant bits values. Thus, if you have + * a row of bit depth 8, but only 5 are significant, this will shift + * the values back to 0 through 31. + */ +void /* PRIVATE */ +png_do_unshift(png_row_infop row_info, png_bytep row, + png_const_color_8p sig_bits) +{ + int color_type; + + png_debug(1, "in png_do_unshift"); + + /* The palette case has already been handled in the _init routine. */ + color_type = row_info->color_type; + + if (color_type != PNG_COLOR_TYPE_PALETTE) + { + int shift[4]; + int channels = 0; + int bit_depth = row_info->bit_depth; + + if (color_type & PNG_COLOR_MASK_COLOR) + { + shift[channels++] = bit_depth - sig_bits->red; + shift[channels++] = bit_depth - sig_bits->green; + shift[channels++] = bit_depth - sig_bits->blue; + } + + else + { + shift[channels++] = bit_depth - sig_bits->gray; + } + + if (color_type & PNG_COLOR_MASK_ALPHA) + { + shift[channels++] = bit_depth - sig_bits->alpha; + } + + { + int c, have_shift; + + for (c = have_shift = 0; c < channels; ++c) + { + /* A shift of more than the bit depth is an error condition but it + * gets ignored here. + */ + if (shift[c] <= 0 || shift[c] >= bit_depth) + shift[c] = 0; + + else + have_shift = 1; + } + + if (!have_shift) + return; + } + + switch (bit_depth) + { + default: + /* Must be 1bpp gray: should not be here! */ + /* NOTREACHED */ + break; + + case 2: + /* Must be 2bpp gray */ + /* assert(channels == 1 && shift[0] == 1) */ + { + png_bytep bp = row; + png_bytep bp_end = bp + row_info->rowbytes; + + while (bp < bp_end) + { + int b = (*bp >> 1) & 0x55; + *bp++ = (png_byte)b; + } + break; + } + + case 4: + /* Must be 4bpp gray */ + /* assert(channels == 1) */ + { + png_bytep bp = row; + png_bytep bp_end = bp + row_info->rowbytes; + int gray_shift = shift[0]; + int mask = 0xf >> gray_shift; + + mask |= mask << 4; + + while (bp < bp_end) + { + int b = (*bp >> gray_shift) & mask; + *bp++ = (png_byte)b; + } + break; + } + + case 8: + /* Single byte components, G, GA, RGB, RGBA */ + { + png_bytep bp = row; + png_bytep bp_end = bp + row_info->rowbytes; + int channel = 0; + + while (bp < bp_end) + { + int b = *bp >> shift[channel]; + if (++channel >= channels) + channel = 0; + *bp++ = (png_byte)b; + } + break; + } + +#ifdef PNG_READ_16BIT_SUPPORTED + case 16: + /* Double byte components, G, GA, RGB, RGBA */ + { + png_bytep bp = row; + png_bytep bp_end = bp + row_info->rowbytes; + int channel = 0; + + while (bp < bp_end) + { + int value = (bp[0] << 8) + bp[1]; + + value >>= shift[channel]; + if (++channel >= channels) + channel = 0; + *bp++ = (png_byte)(value >> 8); + *bp++ = (png_byte)(value & 0xff); + } + break; + } +#endif + } + } +} +#endif + +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED +/* Scale rows of bit depth 16 down to 8 accurately */ +void /* PRIVATE */ +png_do_scale_16_to_8(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_scale_16_to_8"); + + if (row_info->bit_depth == 16) + { + png_bytep sp = row; /* source */ + png_bytep dp = row; /* destination */ + png_bytep ep = sp + row_info->rowbytes; /* end+1 */ + + while (sp < ep) + { + /* The input is an array of 16 bit components, these must be scaled to + * 8 bits each. For a 16 bit value V the required value (from the PNG + * specification) is: + * + * (V * 255) / 65535 + * + * This reduces to round(V / 257), or floor((V + 128.5)/257) + * + * Represent V as the two byte value vhi.vlo. Make a guess that the + * result is the top byte of V, vhi, then the correction to this value + * is: + * + * error = floor(((V-vhi.vhi) + 128.5) / 257) + * = floor(((vlo-vhi) + 128.5) / 257) + * + * This can be approximated using integer arithmetic (and a signed + * shift): + * + * error = (vlo-vhi+128) >> 8; + * + * The approximate differs from the exact answer only when (vlo-vhi) is + * 128; it then gives a correction of +1 when the exact correction is + * 0. This gives 128 errors. The exact answer (correct for all 16 bit + * input values) is: + * + * error = (vlo-vhi+128)*65535 >> 24; + * + * An alternative arithmetic calculation which also gives no errors is: + * + * (V * 255 + 32895) >> 16 + */ + + png_int_32 tmp = *sp++; /* must be signed! */ + tmp += (((int)*sp++ - tmp + 128) * 65535) >> 24; + *dp++ = (png_byte)tmp; + } + + row_info->bit_depth = 8; + row_info->pixel_depth = (png_byte)(8 * row_info->channels); + row_info->rowbytes = row_info->width * row_info->channels; + } +} +#endif + +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED +void /* PRIVATE */ +/* Simply discard the low byte. This was the default behavior prior + * to libpng-1.5.4. + */ +png_do_chop(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_chop"); + + if (row_info->bit_depth == 16) + { + png_bytep sp = row; /* source */ + png_bytep dp = row; /* destination */ + png_bytep ep = sp + row_info->rowbytes; /* end+1 */ + + while (sp < ep) + { + *dp++ = *sp; + sp += 2; /* skip low byte */ + } + + row_info->bit_depth = 8; + row_info->pixel_depth = (png_byte)(8 * row_info->channels); + row_info->rowbytes = row_info->width * row_info->channels; + } +} +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED +void /* PRIVATE */ +png_do_read_swap_alpha(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_read_swap_alpha"); + + { + png_uint_32 row_width = row_info->width; + if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + { + /* This converts from RGBA to ARGB */ + if (row_info->bit_depth == 8) + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_byte save; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + save = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = save; + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + /* This converts from RRGGBBAA to AARRGGBB */ + else + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_byte save[2]; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + save[0] = *(--sp); + save[1] = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = save[0]; + *(--dp) = save[1]; + } + } +#endif + } + + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + { + /* This converts from GA to AG */ + if (row_info->bit_depth == 8) + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_byte save; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + save = *(--sp); + *(--dp) = *(--sp); + *(--dp) = save; + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + /* This converts from GGAA to AAGG */ + else + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_byte save[2]; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + save[0] = *(--sp); + save[1] = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = save[0]; + *(--dp) = save[1]; + } + } +#endif + } + } +} +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED +void /* PRIVATE */ +png_do_read_invert_alpha(png_row_infop row_info, png_bytep row) +{ + png_uint_32 row_width; + png_debug(1, "in png_do_read_invert_alpha"); + + row_width = row_info->width; + if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + { + if (row_info->bit_depth == 8) + { + /* This inverts the alpha channel in RGBA */ + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + +/* This does nothing: + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + We can replace it with: +*/ + sp-=3; + dp=sp; + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + /* This inverts the alpha channel in RRGGBBAA */ + else + { + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = (png_byte)(255 - *(--sp)); + +/* This does nothing: + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + We can replace it with: +*/ + sp-=6; + dp=sp; + } + } +#endif + } + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + { + if (row_info->bit_depth == 8) + { + /* This inverts the alpha channel in GA */ + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = *(--sp); + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + else + { + /* This inverts the alpha channel in GGAA */ + png_bytep sp = row + row_info->rowbytes; + png_bytep dp = sp; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + *(--dp) = (png_byte)(255 - *(--sp)); + *(--dp) = (png_byte)(255 - *(--sp)); +/* + *(--dp) = *(--sp); + *(--dp) = *(--sp); +*/ + sp-=2; + dp=sp; + } + } +#endif + } +} +#endif + +#ifdef PNG_READ_FILLER_SUPPORTED +/* Add filler channel if we have RGB color */ +void /* PRIVATE */ +png_do_read_filler(png_row_infop row_info, png_bytep row, + png_uint_32 filler, png_uint_32 flags) +{ + png_uint_32 i; + png_uint_32 row_width = row_info->width; + +#ifdef PNG_READ_16BIT_SUPPORTED + png_byte hi_filler = (png_byte)((filler>>8) & 0xff); +#endif + png_byte lo_filler = (png_byte)(filler & 0xff); + + png_debug(1, "in png_do_read_filler"); + + if ( + row_info->color_type == PNG_COLOR_TYPE_GRAY) + { + if (row_info->bit_depth == 8) + { + if (flags & PNG_FLAG_FILLER_AFTER) + { + /* This changes the data from G to GX */ + png_bytep sp = row + (png_size_t)row_width; + png_bytep dp = sp + (png_size_t)row_width; + for (i = 1; i < row_width; i++) + { + *(--dp) = lo_filler; + *(--dp) = *(--sp); + } + *(--dp) = lo_filler; + row_info->channels = 2; + row_info->pixel_depth = 16; + row_info->rowbytes = row_width * 2; + } + + else + { + /* This changes the data from G to XG */ + png_bytep sp = row + (png_size_t)row_width; + png_bytep dp = sp + (png_size_t)row_width; + for (i = 0; i < row_width; i++) + { + *(--dp) = *(--sp); + *(--dp) = lo_filler; + } + row_info->channels = 2; + row_info->pixel_depth = 16; + row_info->rowbytes = row_width * 2; + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + else if (row_info->bit_depth == 16) + { + if (flags & PNG_FLAG_FILLER_AFTER) + { + /* This changes the data from GG to GGXX */ + png_bytep sp = row + (png_size_t)row_width * 2; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 1; i < row_width; i++) + { + *(--dp) = hi_filler; + *(--dp) = lo_filler; + *(--dp) = *(--sp); + *(--dp) = *(--sp); + } + *(--dp) = hi_filler; + *(--dp) = lo_filler; + row_info->channels = 2; + row_info->pixel_depth = 32; + row_info->rowbytes = row_width * 4; + } + + else + { + /* This changes the data from GG to XXGG */ + png_bytep sp = row + (png_size_t)row_width * 2; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 0; i < row_width; i++) + { + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = hi_filler; + *(--dp) = lo_filler; + } + row_info->channels = 2; + row_info->pixel_depth = 32; + row_info->rowbytes = row_width * 4; + } + } +#endif + } /* COLOR_TYPE == GRAY */ + else if (row_info->color_type == PNG_COLOR_TYPE_RGB) + { + if (row_info->bit_depth == 8) + { + if (flags & PNG_FLAG_FILLER_AFTER) + { + /* This changes the data from RGB to RGBX */ + png_bytep sp = row + (png_size_t)row_width * 3; + png_bytep dp = sp + (png_size_t)row_width; + for (i = 1; i < row_width; i++) + { + *(--dp) = lo_filler; + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + } + *(--dp) = lo_filler; + row_info->channels = 4; + row_info->pixel_depth = 32; + row_info->rowbytes = row_width * 4; + } + + else + { + /* This changes the data from RGB to XRGB */ + png_bytep sp = row + (png_size_t)row_width * 3; + png_bytep dp = sp + (png_size_t)row_width; + for (i = 0; i < row_width; i++) + { + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = lo_filler; + } + row_info->channels = 4; + row_info->pixel_depth = 32; + row_info->rowbytes = row_width * 4; + } + } + +#ifdef PNG_READ_16BIT_SUPPORTED + else if (row_info->bit_depth == 16) + { + if (flags & PNG_FLAG_FILLER_AFTER) + { + /* This changes the data from RRGGBB to RRGGBBXX */ + png_bytep sp = row + (png_size_t)row_width * 6; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 1; i < row_width; i++) + { + *(--dp) = hi_filler; + *(--dp) = lo_filler; + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + } + *(--dp) = hi_filler; + *(--dp) = lo_filler; + row_info->channels = 4; + row_info->pixel_depth = 64; + row_info->rowbytes = row_width * 8; + } + + else + { + /* This changes the data from RRGGBB to XXRRGGBB */ + png_bytep sp = row + (png_size_t)row_width * 6; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 0; i < row_width; i++) + { + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = *(--sp); + *(--dp) = hi_filler; + *(--dp) = lo_filler; + } + + row_info->channels = 4; + row_info->pixel_depth = 64; + row_info->rowbytes = row_width * 8; + } + } +#endif + } /* COLOR_TYPE == RGB */ +} +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +/* Expand grayscale files to RGB, with or without alpha */ +void /* PRIVATE */ +png_do_gray_to_rgb(png_row_infop row_info, png_bytep row) +{ + png_uint_32 i; + png_uint_32 row_width = row_info->width; + + png_debug(1, "in png_do_gray_to_rgb"); + + if (row_info->bit_depth >= 8 && + !(row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + if (row_info->color_type == PNG_COLOR_TYPE_GRAY) + { + if (row_info->bit_depth == 8) + { + /* This changes G to RGB */ + png_bytep sp = row + (png_size_t)row_width - 1; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 0; i < row_width; i++) + { + *(dp--) = *sp; + *(dp--) = *sp; + *(dp--) = *(sp--); + } + } + + else + { + /* This changes GG to RRGGBB */ + png_bytep sp = row + (png_size_t)row_width * 2 - 1; + png_bytep dp = sp + (png_size_t)row_width * 4; + for (i = 0; i < row_width; i++) + { + *(dp--) = *sp; + *(dp--) = *(sp - 1); + *(dp--) = *sp; + *(dp--) = *(sp - 1); + *(dp--) = *(sp--); + *(dp--) = *(sp--); + } + } + } + + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + { + if (row_info->bit_depth == 8) + { + /* This changes GA to RGBA */ + png_bytep sp = row + (png_size_t)row_width * 2 - 1; + png_bytep dp = sp + (png_size_t)row_width * 2; + for (i = 0; i < row_width; i++) + { + *(dp--) = *(sp--); + *(dp--) = *sp; + *(dp--) = *sp; + *(dp--) = *(sp--); + } + } + + else + { + /* This changes GGAA to RRGGBBAA */ + png_bytep sp = row + (png_size_t)row_width * 4 - 1; + png_bytep dp = sp + (png_size_t)row_width * 4; + for (i = 0; i < row_width; i++) + { + *(dp--) = *(sp--); + *(dp--) = *(sp--); + *(dp--) = *sp; + *(dp--) = *(sp - 1); + *(dp--) = *sp; + *(dp--) = *(sp - 1); + *(dp--) = *(sp--); + *(dp--) = *(sp--); + } + } + } + row_info->channels = (png_byte)(row_info->channels + 2); + row_info->color_type |= PNG_COLOR_MASK_COLOR; + row_info->pixel_depth = (png_byte)(row_info->channels * + row_info->bit_depth); + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + } +} +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +/* Reduce RGB files to grayscale, with or without alpha + * using the equation given in Poynton's ColorFAQ of 1998-01-04 at + * (THIS LINK IS DEAD June 2008 but + * versions dated 1998 through November 2002 have been archived at + * http://web.archive.org/web/20000816232553/http://www.inforamp.net/ + * ~poynton/notes/colour_and_gamma/ColorFAQ.txt ) + * Charles Poynton poynton at poynton.com + * + * Y = 0.212671 * R + 0.715160 * G + 0.072169 * B + * + * which can be expressed with integers as + * + * Y = (6969 * R + 23434 * G + 2365 * B)/32768 + * + * Poynton's current link (as of January 2003 through July 2011): + * + * has changed the numbers slightly: + * + * Y = 0.2126*R + 0.7152*G + 0.0722*B + * + * which can be expressed with integers as + * + * Y = (6966 * R + 23436 * G + 2366 * B)/32768 + * + * Historically, however, libpng uses numbers derived from the ITU-R Rec 709 + * end point chromaticities and the D65 white point. Depending on the + * precision used for the D65 white point this produces a variety of different + * numbers, however if the four decimal place value used in ITU-R Rec 709 is + * used (0.3127,0.3290) the Y calculation would be: + * + * Y = (6968 * R + 23435 * G + 2366 * B)/32768 + * + * While this is correct the rounding results in an overflow for white, because + * the sum of the rounded coefficients is 32769, not 32768. Consequently + * libpng uses, instead, the closest non-overflowing approximation: + * + * Y = (6968 * R + 23434 * G + 2366 * B)/32768 + * + * Starting with libpng-1.5.5, if the image being converted has a cHRM chunk + * (including an sRGB chunk) then the chromaticities are used to calculate the + * coefficients. See the chunk handling in pngrutil.c for more information. + * + * In all cases the calculation is to be done in a linear colorspace. If no + * gamma information is available to correct the encoding of the original RGB + * values this results in an implicit assumption that the original PNG RGB + * values were linear. + * + * Other integer coefficents can be used via png_set_rgb_to_gray(). Because + * the API takes just red and green coefficients the blue coefficient is + * calculated to make the sum 32768. This will result in different rounding + * to that used above. + */ +int /* PRIVATE */ +png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row) + +{ + int rgb_error = 0; + + png_debug(1, "in png_do_rgb_to_gray"); + + if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) && + (row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + PNG_CONST png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff; + PNG_CONST png_uint_32 gc = png_ptr->rgb_to_gray_green_coeff; + PNG_CONST png_uint_32 bc = 32768 - rc - gc; + PNG_CONST png_uint_32 row_width = row_info->width; + PNG_CONST int have_alpha = + (row_info->color_type & PNG_COLOR_MASK_ALPHA) != 0; + + if (row_info->bit_depth == 8) + { +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + /* Notice that gamma to/from 1 are not necessarily inverses (if + * there is an overall gamma correction). Prior to 1.5.5 this code + * checked the linearized values for equality; this doesn't match + * the documentation, the original values must be checked. + */ + if (png_ptr->gamma_from_1 != NULL && png_ptr->gamma_to_1 != NULL) + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + png_byte red = *(sp++); + png_byte green = *(sp++); + png_byte blue = *(sp++); + + if (red != green || red != blue) + { + red = png_ptr->gamma_to_1[red]; + green = png_ptr->gamma_to_1[green]; + blue = png_ptr->gamma_to_1[blue]; + + rgb_error |= 1; + *(dp++) = png_ptr->gamma_from_1[ + (rc*red + gc*green + bc*blue + 16384)>>15]; + } + + else + { + /* If there is no overall correction the table will not be + * set. + */ + if (png_ptr->gamma_table != NULL) + red = png_ptr->gamma_table[red]; + + *(dp++) = red; + } + + if (have_alpha) + *(dp++) = *(sp++); + } + } + else +#endif + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + png_byte red = *(sp++); + png_byte green = *(sp++); + png_byte blue = *(sp++); + + if (red != green || red != blue) + { + rgb_error |= 1; + /*NOTE: this is the historical approach which simply + * truncates the results. + */ + *(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15); + } + + else + *(dp++) = red; + + if (have_alpha) + *(dp++) = *(sp++); + } + } + } + + else /* RGB bit_depth == 16 */ + { +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + if (png_ptr->gamma_16_to_1 != NULL && png_ptr->gamma_16_from_1 != NULL) + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + png_uint_16 red, green, blue, w; + + red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + + if (red == green && red == blue) + { + if (png_ptr->gamma_16_table != NULL) + w = png_ptr->gamma_16_table[(red&0xff) + >> png_ptr->gamma_shift][red>>8]; + + else + w = red; + } + + else + { + png_uint_16 red_1 = png_ptr->gamma_16_to_1[(red&0xff) + >> png_ptr->gamma_shift][red>>8]; + png_uint_16 green_1 = + png_ptr->gamma_16_to_1[(green&0xff) >> + png_ptr->gamma_shift][green>>8]; + png_uint_16 blue_1 = png_ptr->gamma_16_to_1[(blue&0xff) + >> png_ptr->gamma_shift][blue>>8]; + png_uint_16 gray16 = (png_uint_16)((rc*red_1 + gc*green_1 + + bc*blue_1 + 16384)>>15); + w = png_ptr->gamma_16_from_1[(gray16&0xff) >> + png_ptr->gamma_shift][gray16 >> 8]; + rgb_error |= 1; + } + + *(dp++) = (png_byte)((w>>8) & 0xff); + *(dp++) = (png_byte)(w & 0xff); + + if (have_alpha) + { + *(dp++) = *(sp++); + *(dp++) = *(sp++); + } + } + } + else +#endif + { + png_bytep sp = row; + png_bytep dp = row; + png_uint_32 i; + + for (i = 0; i < row_width; i++) + { + png_uint_16 red, green, blue, gray16; + + red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2; + + if (red != green || red != blue) + rgb_error |= 1; + + /* From 1.5.5 in the 16 bit case do the accurate conversion even + * in the 'fast' case - this is because this is where the code + * ends up when handling linear 16 bit data. + */ + gray16 = (png_uint_16)((rc*red + gc*green + bc*blue + 16384) >> + 15); + *(dp++) = (png_byte)((gray16>>8) & 0xff); + *(dp++) = (png_byte)(gray16 & 0xff); + + if (have_alpha) + { + *(dp++) = *(sp++); + *(dp++) = *(sp++); + } + } + } + } + + row_info->channels = (png_byte)(row_info->channels - 2); + row_info->color_type = (png_byte)(row_info->color_type & + ~PNG_COLOR_MASK_COLOR); + row_info->pixel_depth = (png_byte)(row_info->channels * + row_info->bit_depth); + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + } + return rgb_error; +} +#endif +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED +/* Build a grayscale palette. Palette is assumed to be 1 << bit_depth + * large of png_color. This lets grayscale images be treated as + * paletted. Most useful for gamma correction and simplification + * of code. This API is not used internally. + */ +void PNGAPI +png_build_grayscale_palette(int bit_depth, png_colorp palette) +{ + int num_palette; + int color_inc; + int i; + int v; + + png_debug(1, "in png_do_build_grayscale_palette"); + + if (palette == NULL) + return; + + switch (bit_depth) + { + case 1: + num_palette = 2; + color_inc = 0xff; + break; + + case 2: + num_palette = 4; + color_inc = 0x55; + break; + + case 4: + num_palette = 16; + color_inc = 0x11; + break; + + case 8: + num_palette = 256; + color_inc = 1; + break; + + default: + num_palette = 0; + color_inc = 0; + break; + } + + for (i = 0, v = 0; i < num_palette; i++, v += color_inc) + { + palette[i].red = (png_byte)v; + palette[i].green = (png_byte)v; + palette[i].blue = (png_byte)v; + } +} +#endif + + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\ + (defined PNG_READ_ALPHA_MODE_SUPPORTED) +/* Replace any alpha or transparency with the supplied background color. + * "background" is already in the screen gamma, while "background_1" is + * at a gamma of 1.0. Paletted files have already been taken care of. + */ +void /* PRIVATE */ +png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr) +{ +#ifdef PNG_READ_GAMMA_SUPPORTED + png_const_bytep gamma_table = png_ptr->gamma_table; + png_const_bytep gamma_from_1 = png_ptr->gamma_from_1; + png_const_bytep gamma_to_1 = png_ptr->gamma_to_1; + png_const_uint_16pp gamma_16 = png_ptr->gamma_16_table; + png_const_uint_16pp gamma_16_from_1 = png_ptr->gamma_16_from_1; + png_const_uint_16pp gamma_16_to_1 = png_ptr->gamma_16_to_1; + int gamma_shift = png_ptr->gamma_shift; +#endif + + png_bytep sp; + png_uint_32 i; + png_uint_32 row_width = row_info->width; + int optimize = (png_ptr->flags & PNG_FLAG_OPTIMIZE_ALPHA) != 0; + int shift; + + png_debug(1, "in png_do_compose"); + + { + switch (row_info->color_type) + { + case PNG_COLOR_TYPE_GRAY: + { + switch (row_info->bit_depth) + { + case 1: + { + sp = row; + shift = 7; + for (i = 0; i < row_width; i++) + { + if ((png_uint_16)((*sp >> shift) & 0x01) + == png_ptr->trans_color.gray) + { + *sp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); + *sp |= (png_byte)(png_ptr->background.gray << shift); + } + + if (!shift) + { + shift = 7; + sp++; + } + + else + shift--; + } + break; + } + + case 2: + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_table != NULL) + { + sp = row; + shift = 6; + for (i = 0; i < row_width; i++) + { + if ((png_uint_16)((*sp >> shift) & 0x03) + == png_ptr->trans_color.gray) + { + *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); + *sp |= (png_byte)(png_ptr->background.gray << shift); + } + + else + { + png_byte p = (png_byte)((*sp >> shift) & 0x03); + png_byte g = (png_byte)((gamma_table [p | (p << 2) | + (p << 4) | (p << 6)] >> 6) & 0x03); + *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); + *sp |= (png_byte)(g << shift); + } + + if (!shift) + { + shift = 6; + sp++; + } + + else + shift -= 2; + } + } + + else +#endif + { + sp = row; + shift = 6; + for (i = 0; i < row_width; i++) + { + if ((png_uint_16)((*sp >> shift) & 0x03) + == png_ptr->trans_color.gray) + { + *sp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); + *sp |= (png_byte)(png_ptr->background.gray << shift); + } + + if (!shift) + { + shift = 6; + sp++; + } + + else + shift -= 2; + } + } + break; + } + + case 4: + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_table != NULL) + { + sp = row; + shift = 4; + for (i = 0; i < row_width; i++) + { + if ((png_uint_16)((*sp >> shift) & 0x0f) + == png_ptr->trans_color.gray) + { + *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); + *sp |= (png_byte)(png_ptr->background.gray << shift); + } + + else + { + png_byte p = (png_byte)((*sp >> shift) & 0x0f); + png_byte g = (png_byte)((gamma_table[p | + (p << 4)] >> 4) & 0x0f); + *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); + *sp |= (png_byte)(g << shift); + } + + if (!shift) + { + shift = 4; + sp++; + } + + else + shift -= 4; + } + } + + else +#endif + { + sp = row; + shift = 4; + for (i = 0; i < row_width; i++) + { + if ((png_uint_16)((*sp >> shift) & 0x0f) + == png_ptr->trans_color.gray) + { + *sp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); + *sp |= (png_byte)(png_ptr->background.gray << shift); + } + + if (!shift) + { + shift = 4; + sp++; + } + + else + shift -= 4; + } + } + break; + } + + case 8: + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_table != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp++) + { + if (*sp == png_ptr->trans_color.gray) + *sp = (png_byte)png_ptr->background.gray; + + else + *sp = gamma_table[*sp]; + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp++) + { + if (*sp == png_ptr->trans_color.gray) + *sp = (png_byte)png_ptr->background.gray; + } + } + break; + } + + case 16: + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_16 != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 2) + { + png_uint_16 v; + + v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + + if (v == png_ptr->trans_color.gray) + { + /* Background is already in screen gamma */ + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); + } + + else + { + v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + } + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 2) + { + png_uint_16 v; + + v = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + + if (v == png_ptr->trans_color.gray) + { + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); + } + } + } + break; + } + + default: + break; + } + break; + } + + case PNG_COLOR_TYPE_RGB: + { + if (row_info->bit_depth == 8) + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_table != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 3) + { + if (*sp == png_ptr->trans_color.red && + *(sp + 1) == png_ptr->trans_color.green && + *(sp + 2) == png_ptr->trans_color.blue) + { + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; + } + + else + { + *sp = gamma_table[*sp]; + *(sp + 1) = gamma_table[*(sp + 1)]; + *(sp + 2) = gamma_table[*(sp + 2)]; + } + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 3) + { + if (*sp == png_ptr->trans_color.red && + *(sp + 1) == png_ptr->trans_color.green && + *(sp + 2) == png_ptr->trans_color.blue) + { + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; + } + } + } + } + else /* if (row_info->bit_depth == 16) */ + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_16 != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 6) + { + png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + + png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + + *(sp + 5)); + + if (r == png_ptr->trans_color.red && + g == png_ptr->trans_color.green && + b == png_ptr->trans_color.blue) + { + /* Background is already in screen gamma */ + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); + } + + else + { + png_uint_16 v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + + v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; + *(sp + 2) = (png_byte)((v >> 8) & 0xff); + *(sp + 3) = (png_byte)(v & 0xff); + + v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; + *(sp + 4) = (png_byte)((v >> 8) & 0xff); + *(sp + 5) = (png_byte)(v & 0xff); + } + } + } + + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 6) + { + png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + + png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + + *(sp + 5)); + + if (r == png_ptr->trans_color.red && + g == png_ptr->trans_color.green && + b == png_ptr->trans_color.blue) + { + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); + } + } + } + } + break; + } + + case PNG_COLOR_TYPE_GRAY_ALPHA: + { + if (row_info->bit_depth == 8) + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_to_1 != NULL && gamma_from_1 != NULL && + gamma_table != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 2) + { + png_uint_16 a = *(sp + 1); + + if (a == 0xff) + *sp = gamma_table[*sp]; + + else if (a == 0) + { + /* Background is already in screen gamma */ + *sp = (png_byte)png_ptr->background.gray; + } + + else + { + png_byte v, w; + + v = gamma_to_1[*sp]; + png_composite(w, v, a, png_ptr->background_1.gray); + if (!optimize) + w = gamma_from_1[w]; + *sp = w; + } + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 2) + { + png_byte a = *(sp + 1); + + if (a == 0) + *sp = (png_byte)png_ptr->background.gray; + + else if (a < 0xff) + png_composite(*sp, *sp, a, png_ptr->background_1.gray); + } + } + } + else /* if (png_ptr->bit_depth == 16) */ + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_16 != NULL && gamma_16_from_1 != NULL && + gamma_16_to_1 != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 4) + { + png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + if (a == (png_uint_16)0xffff) + { + png_uint_16 v; + + v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + } + + else if (a == 0) + { + /* Background is already in screen gamma */ + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); + } + + else + { + png_uint_16 g, v, w; + + g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; + png_composite_16(v, g, a, png_ptr->background_1.gray); + if (optimize) + w = v; + else + w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8]; + *sp = (png_byte)((w >> 8) & 0xff); + *(sp + 1) = (png_byte)(w & 0xff); + } + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 4) + { + png_uint_16 a = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + + if (a == 0) + { + *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff); + } + + else if (a < 0xffff) + { + png_uint_16 g, v; + + g = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + png_composite_16(v, g, a, png_ptr->background_1.gray); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + } + } + } + } + break; + } + + case PNG_COLOR_TYPE_RGB_ALPHA: + { + if (row_info->bit_depth == 8) + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_to_1 != NULL && gamma_from_1 != NULL && + gamma_table != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 4) + { + png_byte a = *(sp + 3); + + if (a == 0xff) + { + *sp = gamma_table[*sp]; + *(sp + 1) = gamma_table[*(sp + 1)]; + *(sp + 2) = gamma_table[*(sp + 2)]; + } + + else if (a == 0) + { + /* Background is already in screen gamma */ + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; + } + + else + { + png_byte v, w; + + v = gamma_to_1[*sp]; + png_composite(w, v, a, png_ptr->background_1.red); + if (!optimize) w = gamma_from_1[w]; + *sp = w; + + v = gamma_to_1[*(sp + 1)]; + png_composite(w, v, a, png_ptr->background_1.green); + if (!optimize) w = gamma_from_1[w]; + *(sp + 1) = w; + + v = gamma_to_1[*(sp + 2)]; + png_composite(w, v, a, png_ptr->background_1.blue); + if (!optimize) w = gamma_from_1[w]; + *(sp + 2) = w; + } + } + } + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 4) + { + png_byte a = *(sp + 3); + + if (a == 0) + { + *sp = (png_byte)png_ptr->background.red; + *(sp + 1) = (png_byte)png_ptr->background.green; + *(sp + 2) = (png_byte)png_ptr->background.blue; + } + + else if (a < 0xff) + { + png_composite(*sp, *sp, a, png_ptr->background.red); + + png_composite(*(sp + 1), *(sp + 1), a, + png_ptr->background.green); + + png_composite(*(sp + 2), *(sp + 2), a, + png_ptr->background.blue); + } + } + } + } + else /* if (row_info->bit_depth == 16) */ + { +#ifdef PNG_READ_GAMMA_SUPPORTED + if (gamma_16 != NULL && gamma_16_from_1 != NULL && + gamma_16_to_1 != NULL) + { + sp = row; + for (i = 0; i < row_width; i++, sp += 8) + { + png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) + << 8) + (png_uint_16)(*(sp + 7))); + + if (a == (png_uint_16)0xffff) + { + png_uint_16 v; + + v = gamma_16[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + + v = gamma_16[*(sp + 3) >> gamma_shift][*(sp + 2)]; + *(sp + 2) = (png_byte)((v >> 8) & 0xff); + *(sp + 3) = (png_byte)(v & 0xff); + + v = gamma_16[*(sp + 5) >> gamma_shift][*(sp + 4)]; + *(sp + 4) = (png_byte)((v >> 8) & 0xff); + *(sp + 5) = (png_byte)(v & 0xff); + } + + else if (a == 0) + { + /* Background is already in screen gamma */ + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); + } + + else + { + png_uint_16 v, w; + + v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp]; + png_composite_16(w, v, a, png_ptr->background_1.red); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + *sp = (png_byte)((w >> 8) & 0xff); + *(sp + 1) = (png_byte)(w & 0xff); + + v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)]; + png_composite_16(w, v, a, png_ptr->background_1.green); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + + *(sp + 2) = (png_byte)((w >> 8) & 0xff); + *(sp + 3) = (png_byte)(w & 0xff); + + v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)]; + png_composite_16(w, v, a, png_ptr->background_1.blue); + if (!optimize) + w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8]; + + *(sp + 4) = (png_byte)((w >> 8) & 0xff); + *(sp + 5) = (png_byte)(w & 0xff); + } + } + } + + else +#endif + { + sp = row; + for (i = 0; i < row_width; i++, sp += 8) + { + png_uint_16 a = (png_uint_16)(((png_uint_16)(*(sp + 6)) + << 8) + (png_uint_16)(*(sp + 7))); + + if (a == 0) + { + *sp = (png_byte)((png_ptr->background.red >> 8) & 0xff); + *(sp + 1) = (png_byte)(png_ptr->background.red & 0xff); + *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff); + *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff); + *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff); + *(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff); + } + + else if (a < 0xffff) + { + png_uint_16 v; + + png_uint_16 r = (png_uint_16)(((*sp) << 8) + *(sp + 1)); + png_uint_16 g = (png_uint_16)(((*(sp + 2)) << 8) + + *(sp + 3)); + png_uint_16 b = (png_uint_16)(((*(sp + 4)) << 8) + + *(sp + 5)); + + png_composite_16(v, r, a, png_ptr->background.red); + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + + png_composite_16(v, g, a, png_ptr->background.green); + *(sp + 2) = (png_byte)((v >> 8) & 0xff); + *(sp + 3) = (png_byte)(v & 0xff); + + png_composite_16(v, b, a, png_ptr->background.blue); + *(sp + 4) = (png_byte)((v >> 8) & 0xff); + *(sp + 5) = (png_byte)(v & 0xff); + } + } + } + } + break; + } + + default: + break; + } + } +} +#endif /* PNG_READ_BACKGROUND_SUPPORTED || PNG_READ_ALPHA_MODE_SUPPORTED */ + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Gamma correct the image, avoiding the alpha channel. Make sure + * you do this after you deal with the transparency issue on grayscale + * or RGB images. If your bit depth is 8, use gamma_table, if it + * is 16, use gamma_16_table and gamma_shift. Build these with + * build_gamma_table(). + */ +void /* PRIVATE */ +png_do_gamma(png_row_infop row_info, png_bytep row, png_structp png_ptr) +{ + png_const_bytep gamma_table = png_ptr->gamma_table; + png_const_uint_16pp gamma_16_table = png_ptr->gamma_16_table; + int gamma_shift = png_ptr->gamma_shift; + + png_bytep sp; + png_uint_32 i; + png_uint_32 row_width=row_info->width; + + png_debug(1, "in png_do_gamma"); + + if (((row_info->bit_depth <= 8 && gamma_table != NULL) || + (row_info->bit_depth == 16 && gamma_16_table != NULL))) + { + switch (row_info->color_type) + { + case PNG_COLOR_TYPE_RGB: + { + if (row_info->bit_depth == 8) + { + sp = row; + for (i = 0; i < row_width; i++) + { + *sp = gamma_table[*sp]; + sp++; + *sp = gamma_table[*sp]; + sp++; + *sp = gamma_table[*sp]; + sp++; + } + } + + else /* if (row_info->bit_depth == 16) */ + { + sp = row; + for (i = 0; i < row_width; i++) + { + png_uint_16 v; + + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + } + } + break; + } + + case PNG_COLOR_TYPE_RGB_ALPHA: + { + if (row_info->bit_depth == 8) + { + sp = row; + for (i = 0; i < row_width; i++) + { + *sp = gamma_table[*sp]; + sp++; + + *sp = gamma_table[*sp]; + sp++; + + *sp = gamma_table[*sp]; + sp++; + + sp++; + } + } + + else /* if (row_info->bit_depth == 16) */ + { + sp = row; + for (i = 0; i < row_width; i++) + { + png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + + v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 4; + } + } + break; + } + + case PNG_COLOR_TYPE_GRAY_ALPHA: + { + if (row_info->bit_depth == 8) + { + sp = row; + for (i = 0; i < row_width; i++) + { + *sp = gamma_table[*sp]; + sp += 2; + } + } + + else /* if (row_info->bit_depth == 16) */ + { + sp = row; + for (i = 0; i < row_width; i++) + { + png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 4; + } + } + break; + } + + case PNG_COLOR_TYPE_GRAY: + { + if (row_info->bit_depth == 2) + { + sp = row; + for (i = 0; i < row_width; i += 4) + { + int a = *sp & 0xc0; + int b = *sp & 0x30; + int c = *sp & 0x0c; + int d = *sp & 0x03; + + *sp = (png_byte)( + ((((int)gamma_table[a|(a>>2)|(a>>4)|(a>>6)]) ) & 0xc0)| + ((((int)gamma_table[(b<<2)|b|(b>>2)|(b>>4)])>>2) & 0x30)| + ((((int)gamma_table[(c<<4)|(c<<2)|c|(c>>2)])>>4) & 0x0c)| + ((((int)gamma_table[(d<<6)|(d<<4)|(d<<2)|d])>>6) )); + sp++; + } + } + + if (row_info->bit_depth == 4) + { + sp = row; + for (i = 0; i < row_width; i += 2) + { + int msb = *sp & 0xf0; + int lsb = *sp & 0x0f; + + *sp = (png_byte)((((int)gamma_table[msb | (msb >> 4)]) & 0xf0) + | (((int)gamma_table[(lsb << 4) | lsb]) >> 4)); + sp++; + } + } + + else if (row_info->bit_depth == 8) + { + sp = row; + for (i = 0; i < row_width; i++) + { + *sp = gamma_table[*sp]; + sp++; + } + } + + else if (row_info->bit_depth == 16) + { + sp = row; + for (i = 0; i < row_width; i++) + { + png_uint_16 v = gamma_16_table[*(sp + 1) >> gamma_shift][*sp]; + *sp = (png_byte)((v >> 8) & 0xff); + *(sp + 1) = (png_byte)(v & 0xff); + sp += 2; + } + } + break; + } + + default: + break; + } + } +} +#endif + +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED +/* Encode the alpha channel to the output gamma (the input channel is always + * linear.) Called only with color types that have an alpha channel. Needs the + * from_1 tables. + */ +void /* PRIVATE */ +png_do_encode_alpha(png_row_infop row_info, png_bytep row, png_structp png_ptr) +{ + png_uint_32 row_width = row_info->width; + + png_debug(1, "in png_do_encode_alpha"); + + if (row_info->color_type & PNG_COLOR_MASK_ALPHA) + { + if (row_info->bit_depth == 8) + { + PNG_CONST png_bytep table = png_ptr->gamma_from_1; + + if (table != NULL) + { + PNG_CONST int step = + (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 4 : 2; + + /* The alpha channel is the last component: */ + row += step - 1; + + for (; row_width > 0; --row_width, row += step) + *row = table[*row]; + + return; + } + } + + else if (row_info->bit_depth == 16) + { + PNG_CONST png_uint_16pp table = png_ptr->gamma_16_from_1; + PNG_CONST int gamma_shift = png_ptr->gamma_shift; + + if (table != NULL) + { + PNG_CONST int step = + (row_info->color_type & PNG_COLOR_MASK_COLOR) ? 8 : 4; + + /* The alpha channel is the last component: */ + row += step - 2; + + for (; row_width > 0; --row_width, row += step) + { + png_uint_16 v; + + v = table[*(row + 1) >> gamma_shift][*row]; + *row = (png_byte)((v >> 8) & 0xff); + *(row + 1) = (png_byte)(v & 0xff); + } + + return; + } + } + } + + /* Only get to here if called with a weird row_info; no harm has been done, + * so just issue a warning. + */ + png_warning(png_ptr, "png_do_encode_alpha: unexpected call"); +} +#endif + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* Expands a palette row to an RGB or RGBA row depending + * upon whether you supply trans and num_trans. + */ +void /* PRIVATE */ +png_do_expand_palette(png_row_infop row_info, png_bytep row, + png_const_colorp palette, png_const_bytep trans_alpha, int num_trans) +{ + int shift, value; + png_bytep sp, dp; + png_uint_32 i; + png_uint_32 row_width=row_info->width; + + png_debug(1, "in png_do_expand_palette"); + + if (row_info->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (row_info->bit_depth < 8) + { + switch (row_info->bit_depth) + { + case 1: + { + sp = row + (png_size_t)((row_width - 1) >> 3); + dp = row + (png_size_t)row_width - 1; + shift = 7 - (int)((row_width + 7) & 0x07); + for (i = 0; i < row_width; i++) + { + if ((*sp >> shift) & 0x01) + *dp = 1; + + else + *dp = 0; + + if (shift == 7) + { + shift = 0; + sp--; + } + + else + shift++; + + dp--; + } + break; + } + + case 2: + { + sp = row + (png_size_t)((row_width - 1) >> 2); + dp = row + (png_size_t)row_width - 1; + shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); + for (i = 0; i < row_width; i++) + { + value = (*sp >> shift) & 0x03; + *dp = (png_byte)value; + if (shift == 6) + { + shift = 0; + sp--; + } + + else + shift += 2; + + dp--; + } + break; + } + + case 4: + { + sp = row + (png_size_t)((row_width - 1) >> 1); + dp = row + (png_size_t)row_width - 1; + shift = (int)((row_width & 0x01) << 2); + for (i = 0; i < row_width; i++) + { + value = (*sp >> shift) & 0x0f; + *dp = (png_byte)value; + if (shift == 4) + { + shift = 0; + sp--; + } + + else + shift += 4; + + dp--; + } + break; + } + + default: + break; + } + row_info->bit_depth = 8; + row_info->pixel_depth = 8; + row_info->rowbytes = row_width; + } + + if (row_info->bit_depth == 8) + { + { + if (num_trans > 0) + { + sp = row + (png_size_t)row_width - 1; + dp = row + (png_size_t)(row_width << 2) - 1; + + for (i = 0; i < row_width; i++) + { + if ((int)(*sp) >= num_trans) + *dp-- = 0xff; + + else + *dp-- = trans_alpha[*sp]; + + *dp-- = palette[*sp].blue; + *dp-- = palette[*sp].green; + *dp-- = palette[*sp].red; + sp--; + } + row_info->bit_depth = 8; + row_info->pixel_depth = 32; + row_info->rowbytes = row_width * 4; + row_info->color_type = 6; + row_info->channels = 4; + } + + else + { + sp = row + (png_size_t)row_width - 1; + dp = row + (png_size_t)(row_width * 3) - 1; + + for (i = 0; i < row_width; i++) + { + *dp-- = palette[*sp].blue; + *dp-- = palette[*sp].green; + *dp-- = palette[*sp].red; + sp--; + } + + row_info->bit_depth = 8; + row_info->pixel_depth = 24; + row_info->rowbytes = row_width * 3; + row_info->color_type = 2; + row_info->channels = 3; + } + } + } + } +} + +/* If the bit depth < 8, it is expanded to 8. Also, if the already + * expanded transparency value is supplied, an alpha channel is built. + */ +void /* PRIVATE */ +png_do_expand(png_row_infop row_info, png_bytep row, + png_const_color_16p trans_color) +{ + int shift, value; + png_bytep sp, dp; + png_uint_32 i; + png_uint_32 row_width=row_info->width; + + png_debug(1, "in png_do_expand"); + + { + if (row_info->color_type == PNG_COLOR_TYPE_GRAY) + { + png_uint_16 gray = (png_uint_16)(trans_color ? trans_color->gray : 0); + + if (row_info->bit_depth < 8) + { + switch (row_info->bit_depth) + { + case 1: + { + gray = (png_uint_16)((gray & 0x01) * 0xff); + sp = row + (png_size_t)((row_width - 1) >> 3); + dp = row + (png_size_t)row_width - 1; + shift = 7 - (int)((row_width + 7) & 0x07); + for (i = 0; i < row_width; i++) + { + if ((*sp >> shift) & 0x01) + *dp = 0xff; + + else + *dp = 0; + + if (shift == 7) + { + shift = 0; + sp--; + } + + else + shift++; + + dp--; + } + break; + } + + case 2: + { + gray = (png_uint_16)((gray & 0x03) * 0x55); + sp = row + (png_size_t)((row_width - 1) >> 2); + dp = row + (png_size_t)row_width - 1; + shift = (int)((3 - ((row_width + 3) & 0x03)) << 1); + for (i = 0; i < row_width; i++) + { + value = (*sp >> shift) & 0x03; + *dp = (png_byte)(value | (value << 2) | (value << 4) | + (value << 6)); + if (shift == 6) + { + shift = 0; + sp--; + } + + else + shift += 2; + + dp--; + } + break; + } + + case 4: + { + gray = (png_uint_16)((gray & 0x0f) * 0x11); + sp = row + (png_size_t)((row_width - 1) >> 1); + dp = row + (png_size_t)row_width - 1; + shift = (int)((1 - ((row_width + 1) & 0x01)) << 2); + for (i = 0; i < row_width; i++) + { + value = (*sp >> shift) & 0x0f; + *dp = (png_byte)(value | (value << 4)); + if (shift == 4) + { + shift = 0; + sp--; + } + + else + shift = 4; + + dp--; + } + break; + } + + default: + break; + } + + row_info->bit_depth = 8; + row_info->pixel_depth = 8; + row_info->rowbytes = row_width; + } + + if (trans_color != NULL) + { + if (row_info->bit_depth == 8) + { + gray = gray & 0xff; + sp = row + (png_size_t)row_width - 1; + dp = row + (png_size_t)(row_width << 1) - 1; + + for (i = 0; i < row_width; i++) + { + if (*sp == gray) + *dp-- = 0; + + else + *dp-- = 0xff; + + *dp-- = *sp--; + } + } + + else if (row_info->bit_depth == 16) + { + png_byte gray_high = (png_byte)((gray >> 8) & 0xff); + png_byte gray_low = (png_byte)(gray & 0xff); + sp = row + row_info->rowbytes - 1; + dp = row + (row_info->rowbytes << 1) - 1; + for (i = 0; i < row_width; i++) + { + if (*(sp - 1) == gray_high && *(sp) == gray_low) + { + *dp-- = 0; + *dp-- = 0; + } + + else + { + *dp-- = 0xff; + *dp-- = 0xff; + } + + *dp-- = *sp--; + *dp-- = *sp--; + } + } + + row_info->color_type = PNG_COLOR_TYPE_GRAY_ALPHA; + row_info->channels = 2; + row_info->pixel_depth = (png_byte)(row_info->bit_depth << 1); + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, + row_width); + } + } + else if (row_info->color_type == PNG_COLOR_TYPE_RGB && trans_color) + { + if (row_info->bit_depth == 8) + { + png_byte red = (png_byte)(trans_color->red & 0xff); + png_byte green = (png_byte)(trans_color->green & 0xff); + png_byte blue = (png_byte)(trans_color->blue & 0xff); + sp = row + (png_size_t)row_info->rowbytes - 1; + dp = row + (png_size_t)(row_width << 2) - 1; + for (i = 0; i < row_width; i++) + { + if (*(sp - 2) == red && *(sp - 1) == green && *(sp) == blue) + *dp-- = 0; + + else + *dp-- = 0xff; + + *dp-- = *sp--; + *dp-- = *sp--; + *dp-- = *sp--; + } + } + else if (row_info->bit_depth == 16) + { + png_byte red_high = (png_byte)((trans_color->red >> 8) & 0xff); + png_byte green_high = (png_byte)((trans_color->green >> 8) & 0xff); + png_byte blue_high = (png_byte)((trans_color->blue >> 8) & 0xff); + png_byte red_low = (png_byte)(trans_color->red & 0xff); + png_byte green_low = (png_byte)(trans_color->green & 0xff); + png_byte blue_low = (png_byte)(trans_color->blue & 0xff); + sp = row + row_info->rowbytes - 1; + dp = row + (png_size_t)(row_width << 3) - 1; + for (i = 0; i < row_width; i++) + { + if (*(sp - 5) == red_high && + *(sp - 4) == red_low && + *(sp - 3) == green_high && + *(sp - 2) == green_low && + *(sp - 1) == blue_high && + *(sp ) == blue_low) + { + *dp-- = 0; + *dp-- = 0; + } + + else + { + *dp-- = 0xff; + *dp-- = 0xff; + } + + *dp-- = *sp--; + *dp-- = *sp--; + *dp-- = *sp--; + *dp-- = *sp--; + *dp-- = *sp--; + *dp-- = *sp--; + } + } + row_info->color_type = PNG_COLOR_TYPE_RGB_ALPHA; + row_info->channels = 4; + row_info->pixel_depth = (png_byte)(row_info->bit_depth << 2); + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + } + } +} +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED +/* If the bit depth is 8 and the color type is not a palette type expand the + * whole row to 16 bits. Has no effect otherwise. + */ +void /* PRIVATE */ +png_do_expand_16(png_row_infop row_info, png_bytep row) +{ + if (row_info->bit_depth == 8 && + row_info->color_type != PNG_COLOR_TYPE_PALETTE) + { + /* The row have a sequence of bytes containing [0..255] and we need + * to turn it into another row containing [0..65535], to do this we + * calculate: + * + * (input / 255) * 65535 + * + * Which happens to be exactly input * 257 and this can be achieved + * simply by byte replication in place (copying backwards). + */ + png_byte *sp = row + row_info->rowbytes; /* source, last byte + 1 */ + png_byte *dp = sp + row_info->rowbytes; /* destination, end + 1 */ + while (dp > sp) + dp[-2] = dp[-1] = *--sp, dp -= 2; + + row_info->rowbytes *= 2; + row_info->bit_depth = 16; + row_info->pixel_depth = (png_byte)(row_info->channels * 16); + } +} +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +void /* PRIVATE */ +png_do_quantize(png_row_infop row_info, png_bytep row, + png_const_bytep palette_lookup, png_const_bytep quantize_lookup) +{ + png_bytep sp, dp; + png_uint_32 i; + png_uint_32 row_width=row_info->width; + + png_debug(1, "in png_do_quantize"); + + if (row_info->bit_depth == 8) + { + if (row_info->color_type == PNG_COLOR_TYPE_RGB && palette_lookup) + { + int r, g, b, p; + sp = row; + dp = row; + for (i = 0; i < row_width; i++) + { + r = *sp++; + g = *sp++; + b = *sp++; + + /* This looks real messy, but the compiler will reduce + * it down to a reasonable formula. For example, with + * 5 bits per color, we get: + * p = (((r >> 3) & 0x1f) << 10) | + * (((g >> 3) & 0x1f) << 5) | + * ((b >> 3) & 0x1f); + */ + p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) & + ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << + (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | + (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & + ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << + (PNG_QUANTIZE_BLUE_BITS)) | + ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & + ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); + + *dp++ = palette_lookup[p]; + } + + row_info->color_type = PNG_COLOR_TYPE_PALETTE; + row_info->channels = 1; + row_info->pixel_depth = row_info->bit_depth; + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + } + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA && + palette_lookup != NULL) + { + int r, g, b, p; + sp = row; + dp = row; + for (i = 0; i < row_width; i++) + { + r = *sp++; + g = *sp++; + b = *sp++; + sp++; + + p = (((r >> (8 - PNG_QUANTIZE_RED_BITS)) & + ((1 << PNG_QUANTIZE_RED_BITS) - 1)) << + (PNG_QUANTIZE_GREEN_BITS + PNG_QUANTIZE_BLUE_BITS)) | + (((g >> (8 - PNG_QUANTIZE_GREEN_BITS)) & + ((1 << PNG_QUANTIZE_GREEN_BITS) - 1)) << + (PNG_QUANTIZE_BLUE_BITS)) | + ((b >> (8 - PNG_QUANTIZE_BLUE_BITS)) & + ((1 << PNG_QUANTIZE_BLUE_BITS) - 1)); + + *dp++ = palette_lookup[p]; + } + + row_info->color_type = PNG_COLOR_TYPE_PALETTE; + row_info->channels = 1; + row_info->pixel_depth = row_info->bit_depth; + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, row_width); + } + + else if (row_info->color_type == PNG_COLOR_TYPE_PALETTE && + quantize_lookup) + { + sp = row; + + for (i = 0; i < row_width; i++, sp++) + { + *sp = quantize_lookup[*sp]; + } + } + } +} +#endif /* PNG_READ_QUANTIZE_SUPPORTED */ +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +#ifdef PNG_MNG_FEATURES_SUPPORTED +/* Undoes intrapixel differencing */ +void /* PRIVATE */ +png_do_read_intrapixel(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_read_intrapixel"); + + if ( + (row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + int bytes_per_pixel; + png_uint_32 row_width = row_info->width; + + if (row_info->bit_depth == 8) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 3; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 4; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + *(rp) = (png_byte)((256 + *rp + *(rp + 1)) & 0xff); + *(rp+2) = (png_byte)((256 + *(rp + 2) + *(rp + 1)) & 0xff); + } + } + else if (row_info->bit_depth == 16) + { + png_bytep rp; + png_uint_32 i; + + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + bytes_per_pixel = 6; + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + bytes_per_pixel = 8; + + else + return; + + for (i = 0, rp = row; i < row_width; i++, rp += bytes_per_pixel) + { + png_uint_32 s0 = (*(rp ) << 8) | *(rp + 1); + png_uint_32 s1 = (*(rp + 2) << 8) | *(rp + 3); + png_uint_32 s2 = (*(rp + 4) << 8) | *(rp + 5); + png_uint_32 red = (s0 + s1 + 65536) & 0xffff; + png_uint_32 blue = (s2 + s1 + 65536) & 0xffff; + *(rp ) = (png_byte)((red >> 8) & 0xff); + *(rp + 1) = (png_byte)(red & 0xff); + *(rp + 4) = (png_byte)((blue >> 8) & 0xff); + *(rp + 5) = (png_byte)(blue & 0xff); + } + } + } +} +#endif /* PNG_MNG_FEATURES_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngrutil.c b/ExternalLibs/glpng/png/pngrutil.c index 90765bb..62e9632 100644 --- a/ExternalLibs/glpng/png/pngrutil.c +++ b/ExternalLibs/glpng/png/pngrutil.c @@ -1,2372 +1,4160 @@ - -/* pngrutil.c - utilities to read a PNG file - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * This file contains routines that are only called from within - * libpng itself during the course of reading an image. - */ - -#define PNG_INTERNAL -#include "png.h" - -#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED -/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ -png_uint_32 -png_get_uint_32(png_bytep buf) -{ - png_uint_32 i = ((png_uint_32)(*buf) << 24) + - ((png_uint_32)(*(buf + 1)) << 16) + - ((png_uint_32)(*(buf + 2)) << 8) + - (png_uint_32)(*(buf + 3)); - - return (i); -} - -#if defined(PNG_READ_pCAL_SUPPORTED) -/* Grab a signed 32-bit integer from a buffer in big-endian format. The - * data is stored in the PNG file in two's complement format, and it is - * assumed that the machine format for signed integers is the same. */ -png_int_32 -png_get_int_32(png_bytep buf) -{ - png_int_32 i = ((png_int_32)(*buf) << 24) + - ((png_int_32)(*(buf + 1)) << 16) + - ((png_int_32)(*(buf + 2)) << 8) + - (png_int_32)(*(buf + 3)); - - return (i); -} -#endif /* PNG_READ_pCAL_SUPPORTED */ - -/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ -png_uint_16 -png_get_uint_16(png_bytep buf) -{ - png_uint_16 i = (png_uint_16)(((png_uint_16)(*buf) << 8) + - (png_uint_16)(*(buf + 1))); - - return (i); -} -#endif /* PNG_READ_BIG_ENDIAN_SUPPORTED */ - -/* Read data, and (optionally) run it through the CRC. */ -void -png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) -{ - png_read_data(png_ptr, buf, length); - png_calculate_crc(png_ptr, buf, length); -} - -/* Optionally skip data and then check the CRC. Depending on whether we - are reading a ancillary or critical chunk, and how the program has set - things up, we may calculate the CRC on the data and print a message. - Returns '1' if there was a CRC error, '0' otherwise. */ -int -png_crc_finish(png_structp png_ptr, png_uint_32 skip) -{ - png_size_t i; - png_size_t istop = png_ptr->zbuf_size; - - for (i = (png_size_t)skip; i > istop; i -= istop) - { - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); - } - if (i) - { - png_crc_read(png_ptr, png_ptr->zbuf, i); - } - - if (png_crc_error(png_ptr)) - { - if ((png_ptr->chunk_name[0] & 0x20 && /* Ancillary */ - !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) || - (!(png_ptr->chunk_name[0] & 0x20) && /* Critical */ - png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)) - { - png_chunk_warning(png_ptr, "CRC error"); - } - else - { - png_chunk_error(png_ptr, "CRC error"); - } - return (1); - } - - return (0); -} - -/* Compare the CRC stored in the PNG file with that calculated by libpng from - the data it has read thus far. */ -int -png_crc_error(png_structp png_ptr) -{ - png_byte crc_bytes[4]; - png_uint_32 crc; - int need_crc = 1; - - if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ - { - if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == - (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) - need_crc = 0; - } - else /* critical */ - { - if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) - need_crc = 0; - } - - png_read_data(png_ptr, crc_bytes, 4); - - if (need_crc) - { - crc = png_get_uint_32(crc_bytes); - return ((int)(crc != png_ptr->crc)); - } - else - return (0); -} - - -/* read and check the IDHR chunk */ -void -png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[13]; - png_uint_32 width, height; - int bit_depth, color_type, compression_type, filter_type; - int interlace_type; - - png_debug(1, "in png_handle_IHDR\n"); - - if (png_ptr->mode != PNG_BEFORE_IHDR) - png_error(png_ptr, "Out of place IHDR"); - - /* check the length */ - if (length != 13) - png_error(png_ptr, "Invalid IHDR chunk"); - - png_ptr->mode |= PNG_HAVE_IHDR; - - png_crc_read(png_ptr, buf, 13); - png_crc_finish(png_ptr, 0); - - width = png_get_uint_32(buf); - height = png_get_uint_32(buf + 4); - bit_depth = buf[8]; - color_type = buf[9]; - compression_type = buf[10]; - filter_type = buf[11]; - interlace_type = buf[12]; - - /* check for width and height valid values */ - if (width == 0 || width > (png_uint_32)2147483647L || height == 0 || - height > (png_uint_32)2147483647L) - png_error(png_ptr, "Invalid image size in IHDR"); - - /* check other values */ - if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && - bit_depth != 8 && bit_depth != 16) - png_error(png_ptr, "Invalid bit depth in IHDR"); - - if (color_type < 0 || color_type == 1 || - color_type == 5 || color_type > 6) - png_error(png_ptr, "Invalid color type in IHDR"); - - if ((color_type == PNG_COLOR_TYPE_PALETTE && bit_depth) > 8 || - ((color_type == PNG_COLOR_TYPE_RGB || - color_type == PNG_COLOR_TYPE_GRAY_ALPHA || - color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) - png_error(png_ptr, "Invalid color type/bit depth combination in IHDR"); - - if (interlace_type >= PNG_INTERLACE_LAST) - png_error(png_ptr, "Unknown interlace method in IHDR"); - - if (compression_type != PNG_COMPRESSION_TYPE_BASE) - png_error(png_ptr, "Unknown compression method in IHDR"); - - if (filter_type != PNG_FILTER_TYPE_BASE) - png_error(png_ptr, "Unknown filter method in IHDR"); - - /* set internal variables */ - png_ptr->width = width; - png_ptr->height = height; - png_ptr->bit_depth = (png_byte)bit_depth; - png_ptr->interlaced = (png_byte)interlace_type; - png_ptr->color_type = (png_byte)color_type; - - /* find number of channels */ - switch (png_ptr->color_type) - { - case PNG_COLOR_TYPE_GRAY: - case PNG_COLOR_TYPE_PALETTE: - png_ptr->channels = 1; - break; - case PNG_COLOR_TYPE_RGB: - png_ptr->channels = 3; - break; - case PNG_COLOR_TYPE_GRAY_ALPHA: - png_ptr->channels = 2; - break; - case PNG_COLOR_TYPE_RGB_ALPHA: - png_ptr->channels = 4; - break; - } - - /* set up other useful info */ - png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * - png_ptr->channels); - png_ptr->rowbytes = ((png_ptr->width * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3); - png_debug1(3,"bit_depth = %d\n", png_ptr->bit_depth); - png_debug1(3,"channels = %d\n", png_ptr->channels); - png_debug1(3,"rowbytes = %d\n", png_ptr->rowbytes); - png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, - color_type, interlace_type, compression_type, filter_type); -} - -/* read and check the palette */ -void -png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_colorp palette; - int num, i; - - png_debug(1, "in png_handle_PLTE\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before PLTE"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid PLTE after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - png_error(png_ptr, "Duplicate PLTE chunk"); - - png_ptr->mode |= PNG_HAVE_PLTE; - -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_crc_finish(png_ptr, length); - return; - } -#endif - - if (length % 3) - { - if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) - { - png_warning(png_ptr, "Invalid palette chunk"); - png_crc_finish(png_ptr, length); - return; - } - else - { - png_error(png_ptr, "Invalid palette chunk"); - } - } - - num = (int)length / 3; - palette = (png_colorp)png_zalloc(png_ptr, (uInt)num, sizeof (png_color)); - png_ptr->flags |= PNG_FLAG_FREE_PALETTE; - for (i = 0; i < num; i++) - { - png_byte buf[3]; - - png_crc_read(png_ptr, buf, 3); - /* don't depend upon png_color being any order */ - palette[i].red = buf[0]; - palette[i].green = buf[1]; - palette[i].blue = buf[2]; - } - - /* If we actually NEED the PLTE chunk (ie for a paletted image), we do - whatever the normal CRC configuration tells us. However, if we - have an RGB image, the PLTE can be considered ancillary, so - we will act as though it is. */ -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) -#endif - { - png_crc_finish(png_ptr, 0); - } -#if !defined(PNG_READ_OPT_PLTE_SUPPORTED) - else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ - { - /* If we don't want to use the data from an ancillary chunk, - we have two options: an error abort, or a warning and we - ignore the data in this chunk (which should be OK, since - it's considered ancillary for a RGB or RGBA image). */ - if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) - { - if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) - { - png_chunk_error(png_ptr, "CRC error"); - } - else - { - png_chunk_warning(png_ptr, "CRC error"); - png_ptr->flags &= ~PNG_FLAG_FREE_PALETTE; - png_zfree(png_ptr, palette); - return; - } - } - /* Otherwise, we (optionally) emit a warning and use the chunk. */ - else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) - { - png_chunk_warning(png_ptr, "CRC error"); - } - } -#endif - png_ptr->palette = palette; - png_ptr->num_palette = (png_uint_16)num; - png_set_PLTE(png_ptr, info_ptr, palette, num); - -#if defined (PNG_READ_tRNS_SUPPORTED) - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS) - { - if (png_ptr->num_trans > png_ptr->num_palette) - { - png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); - png_ptr->num_trans = png_ptr->num_palette; - } - } - } -#endif - -} - -void -png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_debug(1, "in png_handle_IEND\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) - { - png_error(png_ptr, "No image in file"); - - /* to quiet compiler warnings about unused info_ptr */ - if (info_ptr == NULL) - return; - } - - png_ptr->mode |= PNG_AFTER_IDAT | PNG_HAVE_IEND; - - if (length != 0) - { - png_warning(png_ptr, "Incorrect IEND chunk length"); - } - png_crc_finish(png_ptr, length); -} - -#if defined(PNG_READ_gAMA_SUPPORTED) -void -png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_uint_32 igamma; - float file_gamma; - png_byte buf[4]; - - png_debug(1, "in png_handle_gAMA\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before gAMA"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid gAMA after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place gAMA chunk"); - - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_gAMA -#if defined(PNG_READ_sRGB_SUPPORTED) - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate gAMA chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 4) - { - png_warning(png_ptr, "Incorrect gAMA chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 4); - if (png_crc_finish(png_ptr, 0)) - return; - - igamma = png_get_uint_32(buf); - /* check for zero gamma */ - if (igamma == 0) - return; - -#if defined(PNG_READ_sRGB_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sRGB) - if(igamma != (png_uint_32)45000L) - { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifndef PNG_NO_STDIO - fprintf(stderr, "igamma = %lu\n", igamma); -#endif - return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ - - file_gamma = (float)igamma / (float)100000.0; -#ifdef PNG_READ_GAMMA_SUPPORTED - png_ptr->gamma = file_gamma; -#endif - png_set_gAMA(png_ptr, info_ptr, file_gamma); -} -#endif - -#if defined(PNG_READ_sBIT_SUPPORTED) -void -png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[4]; - - png_debug(1, "in png_handle_sBIT\n"); - - buf[0] = buf[1] = buf[2] = buf[3] = 0; - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sBIT after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sBIT chunk"); - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sBIT) - { - png_warning(png_ptr, "Duplicate sBIT chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 3; - else - truelen = (png_size_t)png_ptr->channels; - - if (length != truelen) - { - png_warning(png_ptr, "Incorrect sBIT chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) - return; - - if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - { - png_ptr->sig_bit.red = buf[0]; - png_ptr->sig_bit.green = buf[1]; - png_ptr->sig_bit.blue = buf[2]; - png_ptr->sig_bit.alpha = buf[3]; - } - else - { - png_ptr->sig_bit.gray = buf[0]; - png_ptr->sig_bit.alpha = buf[1]; - } - png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit)); -} -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -void -png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[4]; - png_uint_32 val; - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; - - png_debug(1, "in png_handle_cHRM\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sBIT"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid cHRM after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Missing PLTE before cHRM"); - - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_cHRM -#if defined(PNG_READ_sRGB_SUPPORTED) - && !(info_ptr->valid & PNG_INFO_sRGB) -#endif - ) - { - png_warning(png_ptr, "Duplicate cHRM chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 32) - { - png_warning(png_ptr, "Incorrect cHRM chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - white_x = (float)val / (float)100000.0; - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - white_y = (float)val / (float)100000.0; - - if (white_x < 0 || white_x > 0.8 || white_y < 0 || white_y > 0.8 || - white_x + white_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM white point"); - png_crc_finish(png_ptr, 24); - return; - } - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - red_x = (float)val / (float)100000.0; - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - red_y = (float)val / (float)100000.0; - - if (red_x < 0 || red_x > 0.8 || red_y < 0 || red_y > 0.8 || - red_x + red_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM red point"); - png_crc_finish(png_ptr, 16); - return; - } - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - green_x = (float)val / (float)100000.0; - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - green_y = (float)val / (float)100000.0; - - if (green_x < 0 || green_x > 0.8 || green_y < 0 || green_y > 0.8 || - green_x + green_y > 1.0) - { - png_warning(png_ptr, "Invalid cHRM green point"); - png_crc_finish(png_ptr, 8); - return; - } - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - blue_x = (float)val / (float)100000.0; - - png_crc_read(png_ptr, buf, 4); - val = png_get_uint_32(buf); - blue_y = (float)val / (float)100000.0; - - if (blue_x < (float)0 || blue_x > (float)0.8 || blue_y < (float)0 || - blue_y > (float)0.8 || blue_x + blue_y > (float)1.0) - { - png_warning(png_ptr, "Invalid cHRM blue point"); - png_crc_finish(png_ptr, 0); - return; - } - - if (png_crc_finish(png_ptr, 0)) - return; - -#if defined(PNG_READ_sRGB_SUPPORTED) - if (info_ptr->valid & PNG_INFO_sRGB) - { - if (fabs(white_x - (float).3127) > (float).001 || - fabs(white_y - (float).3290) > (float).001 || - fabs( red_x - (float).6400) > (float).001 || - fabs( red_y - (float).3300) > (float).001 || - fabs(green_x - (float).3000) > (float).001 || - fabs(green_y - (float).6000) > (float).001 || - fabs( blue_x - (float).1500) > (float).001 || - fabs( blue_y - (float).0600) > (float).001) - { - - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); -#ifndef PNG_NO_STDIO - fprintf(stderr,"wx=%f, wy=%f, rx=%f, ry=%f\n", - white_x, white_y, red_x, red_y); - fprintf(stderr,"gx=%f, gy=%f, bx=%f, by=%f\n", - green_x, green_y, blue_x, blue_y); -#endif - } - return; - } -#endif /* PNG_READ_sRGB_SUPPORTED */ - - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); -} -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) -void -png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - int intent; - png_byte buf[1]; - - png_debug(1, "in png_handle_sRGB\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before sRGB"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid sRGB after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->mode & PNG_HAVE_PLTE) - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Out of place sRGB chunk"); - - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_sRGB) - { - png_warning(png_ptr, "Duplicate sRGB chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 1) - { - png_warning(png_ptr, "Incorrect sRGB chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 1); - if (png_crc_finish(png_ptr, 0)) - return; - - intent = buf[0]; - /* check for bad intent */ - if (intent >= PNG_sRGB_INTENT_LAST) - { - png_warning(png_ptr, "Unknown sRGB intent"); - return; - } - -#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) - if ((info_ptr->valid & PNG_INFO_gAMA)) - if((png_uint_32)(png_ptr->gamma*(float)100000.+.5) != (png_uint_32)45000L) - { - png_warning(png_ptr, - "Ignoring incorrect gAMA value when sRGB is also present"); -#ifndef PNG_NO_STDIO - fprintf(stderr,"gamma=%f\n",png_ptr->gamma); -#endif - } -#endif /* PNG_READ_gAMA_SUPPORTED */ - -#ifdef PNG_READ_cHRM_SUPPORTED - if (info_ptr->valid & PNG_INFO_cHRM) - if (fabs(info_ptr->x_white - (float).3127) > (float).001 || - fabs(info_ptr->y_white - (float).3290) > (float).001 || - fabs( info_ptr->x_red - (float).6400) > (float).001 || - fabs( info_ptr->y_red - (float).3300) > (float).001 || - fabs(info_ptr->x_green - (float).3000) > (float).001 || - fabs(info_ptr->y_green - (float).6000) > (float).001 || - fabs( info_ptr->x_blue - (float).1500) > (float).001 || - fabs( info_ptr->y_blue - (float).0600) > (float).001) - { - png_warning(png_ptr, - "Ignoring incorrect cHRM value when sRGB is also present"); - } -#endif /* PNG_READ_cHRM_SUPPORTED */ - - png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); -} -#endif /* PNG_READ_sRGB_SUPPORTED */ - -#if defined(PNG_READ_tRNS_SUPPORTED) -void -png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_debug(1, "in png_handle_tRNS\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tRNS"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid tRNS after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tRNS) - { - png_warning(png_ptr, "Duplicate tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - /* Should be an error, but we can cope with it */ - png_warning(png_ptr, "Missing PLTE before tRNS"); - } - else if (length > png_ptr->num_palette) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - if (length == 0) - { - png_warning(png_ptr, "Zero length tRNS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_ptr->trans = (png_bytep)png_malloc(png_ptr, length); - png_ptr->flags |= PNG_FLAG_FREE_TRANS; - png_crc_read(png_ptr, png_ptr->trans, (png_size_t)length); - png_ptr->num_trans = (png_uint_16)length; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - png_byte buf[6]; - - if (length != 6) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, (png_size_t)length); - png_ptr->num_trans = 1; - png_ptr->trans_values.red = png_get_uint_16(buf); - png_ptr->trans_values.green = png_get_uint_16(buf + 2); - png_ptr->trans_values.blue = png_get_uint_16(buf + 4); - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - png_byte buf[6]; - - if (length != 2) - { - png_warning(png_ptr, "Incorrect tRNS chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 2); - png_ptr->num_trans = 1; - png_ptr->trans_values.gray = png_get_uint_16(buf); - } - else - { - png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_crc_finish(png_ptr, 0)) - return; - - png_set_tRNS(png_ptr, info_ptr, png_ptr->trans, png_ptr->num_trans, - &(png_ptr->trans_values)); -} -#endif - -#if defined(PNG_READ_bKGD_SUPPORTED) -void -png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_size_t truelen; - png_byte buf[6]; - - png_debug(1, "in png_handle_bKGD\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before bKGD"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid bKGD after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && - !(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before bKGD"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_bKGD) - { - png_warning(png_ptr, "Duplicate bKGD chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - truelen = 1; - else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) - truelen = 6; - else - truelen = 2; - - if (length != truelen) - { - png_warning(png_ptr, "Incorrect bKGD chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, truelen); - if (png_crc_finish(png_ptr, 0)) - return; - - /* We convert the index value into RGB components so that we can allow - * arbitrary RGB values for background when we have transparency, and - * so it is easy to determine the RGB values of the background color - * from the info_ptr struct. */ - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - png_ptr->background.index = buf[0]; - png_ptr->background.red = (png_uint_16)png_ptr->palette[buf[0]].red; - png_ptr->background.green = (png_uint_16)png_ptr->palette[buf[0]].green; - png_ptr->background.blue = (png_uint_16)png_ptr->palette[buf[0]].blue; - } - else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ - { - png_ptr->background.red = - png_ptr->background.green = - png_ptr->background.blue = - png_ptr->background.gray = png_get_uint_16(buf); - } - else - { - png_ptr->background.red = png_get_uint_16(buf); - png_ptr->background.green = png_get_uint_16(buf + 2); - png_ptr->background.blue = png_get_uint_16(buf + 4); - } - - png_set_bKGD(png_ptr, info_ptr, &(png_ptr->background)); -} -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -void -png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - int num, i; - - png_debug(1, "in png_handle_hIST\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before hIST"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid hIST after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (!(png_ptr->mode & PNG_HAVE_PLTE)) - { - png_warning(png_ptr, "Missing PLTE before hIST"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_hIST) - { - png_warning(png_ptr, "Duplicate hIST chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != (png_uint_32)(2 * png_ptr->num_palette)) - { - png_warning(png_ptr, "Incorrect hIST chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - num = (int)length / 2; - png_ptr->hist = (png_uint_16p)png_malloc(png_ptr, - (png_uint_32)(num * sizeof (png_uint_16))); - png_ptr->flags |= PNG_FLAG_FREE_HIST; - for (i = 0; i < num; i++) - { - png_byte buf[2]; - - png_crc_read(png_ptr, buf, 2); - png_ptr->hist[i] = png_get_uint_16(buf); - } - - if (png_crc_finish(png_ptr, 0)) - return; - - png_set_hIST(png_ptr, info_ptr, png_ptr->hist); -} -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -void -png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_uint_32 res_x, res_y; - int unit_type; - - png_debug(1, "in png_handle_pHYs\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pHYS"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pHYS after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pHYs) - { - png_warning(png_ptr, "Duplicate pHYS chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect pHYs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) - return; - - res_x = png_get_uint_32(buf); - res_y = png_get_uint_32(buf + 4); - unit_type = buf[8]; - png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); -} -#endif - -#if defined(PNG_READ_oFFs_SUPPORTED) -void -png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[9]; - png_uint_32 offset_x, offset_y; - int unit_type; - - png_debug(1, "in png_handle_oFFs\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before oFFs"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid oFFs after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_oFFs) - { - png_warning(png_ptr, "Duplicate oFFs chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (length != 9) - { - png_warning(png_ptr, "Incorrect oFFs chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 9); - if (png_crc_finish(png_ptr, 0)) - return; - - offset_x = png_get_uint_32(buf); - offset_y = png_get_uint_32(buf + 4); - unit_type = buf[8]; - png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); -} -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -/* read the pCAL chunk (png-scivis-19970203) */ -void -png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_charp purpose; - png_int_32 X0, X1; - png_byte type, nparams; - png_charp buf, units, endptr; - png_charpp params; - png_size_t slength; - int i; - - png_debug(1, "in png_handle_pCAL\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before pCAL"); - else if (png_ptr->mode & PNG_HAVE_IDAT) - { - png_warning(png_ptr, "Invalid pCAL after IDAT"); - png_crc_finish(png_ptr, length); - return; - } - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_pCAL) - { - png_warning(png_ptr, "Duplicate pCAL chunk"); - png_crc_finish(png_ptr, length); - return; - } - - png_debug1(2, "Allocating and reading pCAL chunk data (%d bytes)\n", - length + 1); - purpose = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)purpose, slength); - - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, purpose); - return; - } - - purpose[slength] = 0x00; /* null terminate the last string */ - - png_debug(3, "Finding end of pCAL purpose string\n"); - for (buf = purpose; *buf; buf++) - /* empty loop */ ; - - endptr = purpose + slength; - - /* We need to have at least 12 bytes after the purpose string - in order to get the parameter information. */ - if (endptr <= buf + 12) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, purpose); - return; - } - - png_debug(3, "Reading pCAL X0, X1, type, nparams, and units\n"); - X0 = png_get_int_32((png_bytep)buf+1); - X1 = png_get_int_32((png_bytep)buf+5); - type = buf[9]; - nparams = buf[10]; - units = buf + 11; - - png_debug(3, "Checking pCAL equation type and number of parameters\n"); - /* Check that we have the right number of parameters for known - equation types. */ - if ((type == PNG_EQUATION_LINEAR && nparams != 2) || - (type == PNG_EQUATION_BASE_E && nparams != 3) || - (type == PNG_EQUATION_ARBITRARY && nparams != 3) || - (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) - { - png_warning(png_ptr, "Invalid pCAL parameters for equation type"); - png_free(png_ptr, purpose); - return; - } - else if (type >= PNG_EQUATION_LAST) - { - png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); - } - - for (buf = units; *buf; buf++) - /* Empty loop to move past the units string. */ ; - - png_debug(3, "Allocating pCAL parameters array\n"); - params = (png_charpp)png_malloc(png_ptr, (png_uint_32)(nparams - *sizeof(png_charp))) ; - - /* Get pointers to the start of each parameter string. */ - for (i = 0; i < (int)nparams; i++) - { - buf++; /* Skip the null string terminator from previous parameter. */ - - png_debug1(3, "Reading pCAL parameter %d\n", i); - for (params[i] = buf; *buf != 0x00 && buf <= endptr; buf++) - /* Empty loop to move past each parameter string */ ; - - /* Make sure we haven't run out of data yet */ - if (buf > endptr) - { - png_warning(png_ptr, "Invalid pCAL data"); - png_free(png_ptr, purpose); - png_free(png_ptr, params); - return; - } - } - - png_set_pCAL(png_ptr, info_ptr, purpose, X0, X1, type, nparams, - units, params); - - png_free(png_ptr, purpose); - png_free(png_ptr, params); -} -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -void -png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_byte buf[7]; - png_time mod_time; - - png_debug(1, "in png_handle_tIME\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Out of place tIME chunk"); - else if (info_ptr != NULL && info_ptr->valid & PNG_INFO_tIME) - { - png_warning(png_ptr, "Duplicate tIME chunk"); - png_crc_finish(png_ptr, length); - return; - } - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - - if (length != 7) - { - png_warning(png_ptr, "Incorrect tIME chunk length"); - png_crc_finish(png_ptr, length); - return; - } - - png_crc_read(png_ptr, buf, 7); - if (png_crc_finish(png_ptr, 0)) - return; - - mod_time.second = buf[6]; - mod_time.minute = buf[5]; - mod_time.hour = buf[4]; - mod_time.day = buf[3]; - mod_time.month = buf[2]; - mod_time.year = png_get_uint_16(buf); - - png_set_tIME(png_ptr, info_ptr, &mod_time); -} -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) -/* Note: this does not properly handle chunks that are > 64K under DOS */ -void -png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_textp text_ptr; - png_charp key; - png_charp text; - png_uint_32 skip = 0; - png_size_t slength; - - png_debug(1, "in png_handle_tEXt\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before tEXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr, "tEXt chunk too large to fit in memory"); - skip = length - (png_uint_32)65535L; - length = (png_uint_32)65535L; - } -#endif - - key = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)key, slength); - - if (png_crc_finish(png_ptr, skip)) - { - png_free(png_ptr, key); - return; - } - - key[slength] = 0x00; - - for (text = key; *text; text++) - /* empty loop to find end of key */ ; - - if (text != key + slength) - text++; - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; - text_ptr->key = key; - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); -} -#endif - -#if defined(PNG_READ_zTXt_SUPPORTED) -/* note: this does not correctly handle chunks that are > 64K under DOS */ -void -png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - static char msg[] = "Error decoding zTXt chunk"; - png_textp text_ptr; - png_charp key; - png_charp text; - int comp_type = PNG_TEXT_COMPRESSION_NONE; - png_size_t slength; - - png_debug(1, "in png_handle_zTXt\n"); - - if (!(png_ptr->mode & PNG_HAVE_IHDR)) - png_error(png_ptr, "Missing IHDR before zTXt"); - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - -#ifdef PNG_MAX_MALLOC_64K - /* We will no doubt have problems with chunks even half this size, but - there is no hard and fast rule to tell us where to stop. */ - if (length > (png_uint_32)65535L) - { - png_warning(png_ptr,"zTXt chunk too large to fit in memory"); - png_crc_finish(png_ptr, length); - return; - } -#endif - - key = (png_charp)png_malloc(png_ptr, length + 1); - slength = (png_size_t)length; - png_crc_read(png_ptr, (png_bytep)key, slength); - if (png_crc_finish(png_ptr, 0)) - { - png_free(png_ptr, key); - return; - } - - key[slength] = 0x00; - - for (text = key; *text; text++) - /* empty loop */ ; - - /* zTXt must have some text after the keyword */ - if (text == key + slength) - { - png_warning(png_ptr, "Zero length zTXt chunk"); - } - else if ((comp_type = *(++text)) == PNG_TEXT_COMPRESSION_zTXt) - { - png_size_t text_size, key_size; - text++; - - png_ptr->zstream.next_in = (png_bytep)text; - png_ptr->zstream.avail_in = (uInt)(length - (text - key)); - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - - key_size = (png_size_t)(text - key); - text_size = 0; - text = NULL; - - while (png_ptr->zstream.avail_in) - { - int ret; - - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret != Z_OK && ret != Z_STREAM_END) - { - if (png_ptr->zstream.msg != NULL) - png_warning(png_ptr, png_ptr->zstream.msg); - else - png_warning(png_ptr, msg); - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - if (text == NULL) - { - text_size = key_size + sizeof(msg) + 1; - text = (png_charp)png_malloc(png_ptr, (png_uint_32)text_size); - png_memcpy(text, key, key_size); - } - - text[text_size - 1] = 0x00; - - /* Copy what we can of the error message into the text chunk */ - text_size = (png_size_t)(slength - (text - key) - 1); - text_size = sizeof(msg) > text_size ? text_size : sizeof(msg); - png_memcpy(text + key_size, msg, text_size + 1); - break; - } - if (!png_ptr->zstream.avail_out || ret == Z_STREAM_END) - { - if (text == NULL) - { - text = (png_charp)png_malloc(png_ptr, - (png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out - + key_size + 1)); - png_memcpy(text + key_size, png_ptr->zbuf, - png_ptr->zbuf_size - png_ptr->zstream.avail_out); - png_memcpy(text, key, key_size); - text_size = key_size + png_ptr->zbuf_size - - png_ptr->zstream.avail_out; - *(text + text_size) = 0x00; - } - else - { - png_charp tmp; - - tmp = text; - text = (png_charp)png_malloc(png_ptr, (png_uint_32)(text_size + - png_ptr->zbuf_size - png_ptr->zstream.avail_out + 1)); - png_memcpy(text, tmp, text_size); - png_free(png_ptr, tmp); - png_memcpy(text + text_size, png_ptr->zbuf, - (png_ptr->zbuf_size - png_ptr->zstream.avail_out)); - text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out; - *(text + text_size) = 0x00; - } - if (ret != Z_STREAM_END) - { - png_ptr->zstream.next_out = png_ptr->zbuf; - png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; - } - else - { - break; - } - } - } - - inflateReset(&png_ptr->zstream); - png_ptr->zstream.avail_in = 0; - - png_free(png_ptr, key); - key = text; - text += key_size; - } - else /* if (comp_type >= PNG_TEXT_COMPRESSION_LAST) */ - { - png_size_t text_size; -#if !defined(PNG_NO_STDIO) - char umsg[50]; - - sprintf(umsg, "Unknown zTXt compression type %d", comp_type); - png_warning(png_ptr, umsg); -#else - png_warning(png_ptr, "Unknown zTXt compression type"); -#endif - - /* Copy what we can of the error message into the text chunk */ - text_size = (png_size_t)(slength - (text - key) - 1); - text_size = sizeof(msg) > text_size ? text_size : sizeof(msg); - png_memcpy(text, msg, text_size + 1); - } - - text_ptr = (png_textp)png_malloc(png_ptr, (png_uint_32)sizeof(png_text)); - text_ptr->compression = comp_type; - text_ptr->key = key; - text_ptr->text = text; - - png_set_text(png_ptr, info_ptr, text_ptr, 1); - - png_free(png_ptr, text_ptr); -} -#endif - -/* This function is called when we haven't found a handler for a - chunk. If there isn't a problem with the chunk itself (ie bad - chunk name, CRC, or a critical chunk), the chunk is silently ignored. */ -void -png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -{ - png_debug(1, "in png_handle_unknown\n"); - - /* In the future we can have code here that calls user-supplied - * callback functions for unknown chunks before they are ignored or - * cause an error. - */ - png_check_chunk_name(png_ptr, png_ptr->chunk_name); - - if (!(png_ptr->chunk_name[0] & 0x20)) - { - png_chunk_error(png_ptr, "unknown critical chunk"); - - /* to quiet compiler warnings about unused info_ptr */ - if (info_ptr == NULL) - return; - } - - if (png_ptr->mode & PNG_HAVE_IDAT) - png_ptr->mode |= PNG_AFTER_IDAT; - - png_crc_finish(png_ptr, length); - -} - -/* This function is called to verify that a chunk name is valid. - This function can't have the "critical chunk check" incorporated - into it, since in the future we will need to be able to call user - functions to handle unknown critical chunks after we check that - the chunk name itself is valid. */ - -#define isnonalpha(c) ((c) < 41 || (c) > 122 || ((c) > 90 && (c) < 97)) - -void -png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name) -{ - png_debug(1, "in png_check_chunk_name\n"); - if (isnonalpha(chunk_name[0]) || isnonalpha(chunk_name[1]) || - isnonalpha(chunk_name[2]) || isnonalpha(chunk_name[3])) - { - png_chunk_error(png_ptr, "invalid chunk type"); - } -} - -/* Combines the row recently read in with the existing pixels in the - row. This routine takes care of alpha and transparency if requested. - This routine also handles the two methods of progressive display - of interlaced images, depending on the mask value. - The mask value describes which pixels are to be combined with - the row. The pattern always repeats every 8 pixels, so just 8 - bits are needed. A one indicates the pixel is to be combined, - a zero indicates the pixel is to be skipped. This is in addition - to any alpha or transparency value associated with the pixel. If - you want all pixels to be combined, pass 0xff (255) in mask. */ -void -png_combine_row(png_structp png_ptr, png_bytep row, - int mask) -{ - png_debug(1,"in png_combine_row\n"); - if (mask == 0xff) - { - png_memcpy(row, png_ptr->row_buf + 1, - (png_size_t)((png_ptr->width * - png_ptr->row_info.pixel_depth + 7) >> 3)); - } - else - { - switch (png_ptr->row_info.pixel_depth) - { - case 1: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_inc, s_start, s_end; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 7; - s_inc = 1; - } - else -#endif - { - s_start = 7; - s_end = 0; - s_inc = -1; - } - - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - int value; - - value = (*sp >> shift) & 0x1; - *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 2: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 6; - s_inc = 2; - } - else -#endif - { - s_start = 6; - s_end = 0; - s_inc = -2; - } - - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0x3; - *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - case 4: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - int s_start, s_end, s_inc; - int m = 0x80; - int shift; - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - int value; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (png_ptr->transformations & PNG_PACKSWAP) - { - s_start = 0; - s_end = 4; - s_inc = 4; - } - else -#endif - { - s_start = 4; - s_end = 0; - s_inc = -4; - } - shift = s_start; - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - value = (*sp >> shift) & 0xf; - *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); - *dp |= (png_byte)(value << shift); - } - - if (shift == s_end) - { - shift = s_start; - sp++; - dp++; - } - else - shift += s_inc; - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - default: - { - png_bytep sp = png_ptr->row_buf + 1; - png_bytep dp = row; - png_size_t pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); - png_uint_32 i; - png_uint_32 row_width = png_ptr->width; - png_byte m = 0x80; - - - for (i = 0; i < row_width; i++) - { - if (m & mask) - { - png_memcpy(dp, sp, pixel_bytes); - } - - sp += pixel_bytes; - dp += pixel_bytes; - - if (m == 1) - m = 0x80; - else - m >>= 1; - } - break; - } - } - } -} - -#if defined(PNG_READ_INTERLACING_SUPPORTED) -void -png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, - png_uint_32 transformations) -{ - png_debug(1,"in png_do_read_interlace\n"); - if (row != NULL && row_info != NULL) - { - png_uint_32 final_width; - - final_width = row_info->width * png_pass_inc[pass]; - - switch (row_info->pixel_depth) - { - case 1: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 3); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_byte v; - png_uint_32 i; - int j; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)((row_info->width + 7) & 7); - dshift = (int)((final_width + 7) & 7); - s_start = 7; - s_end = 0; - s_inc = -1; - } - else -#endif - { - sshift = 7 - (int)((row_info->width + 7) & 7); - dshift = 7 - (int)((final_width + 7) & 7); - s_start = 0; - s_end = 7; - s_inc = 1; - } - - for (i = 0; i < row_info->width; i++) - { - v = (png_byte)((*sp >> sshift) & 0x1); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - case 2: - { - png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2); - png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2); - int sshift, dshift; - int s_start, s_end, s_inc; - int jstop = png_pass_inc[pass]; - png_uint_32 i; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 3) & 3) << 1); - dshift = (int)(((final_width + 3) & 3) << 1); - s_start = 6; - s_end = 0; - s_inc = -2; - } - else -#endif - { - sshift = (int)((3 - ((row_info->width + 3) & 3)) << 1); - dshift = (int)((3 - ((final_width + 3) & 3)) << 1); - s_start = 0; - s_end = 6; - s_inc = 2; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v; - int j; - - v = (png_byte)((*sp >> sshift) & 0x3); - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - case 4: - { - png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1); - png_bytep dp = row + (png_size_t)((final_width - 1) >> 1); - int sshift, dshift; - int s_start, s_end, s_inc; - png_uint_32 i; - int jstop = png_pass_inc[pass]; - -#if defined(PNG_READ_PACKSWAP_SUPPORTED) - if (transformations & PNG_PACKSWAP) - { - sshift = (int)(((row_info->width + 1) & 1) << 2); - dshift = (int)(((final_width + 1) & 1) << 2); - s_start = 4; - s_end = 0; - s_inc = -4; - } - else -#endif - { - sshift = (int)((1 - ((row_info->width + 1) & 1)) << 2); - dshift = (int)((1 - ((final_width + 1) & 1)) << 2); - s_start = 0; - s_end = 4; - s_inc = 4; - } - - for (i = 0; i < row_info->width; i++) - { - png_byte v = (png_byte)((*sp >> sshift) & 0xf); - int j; - - for (j = 0; j < jstop; j++) - { - *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); - *dp |= (png_byte)(v << dshift); - if (dshift == s_end) - { - dshift = s_start; - dp--; - } - else - dshift += s_inc; - } - if (sshift == s_end) - { - sshift = s_start; - sp--; - } - else - sshift += s_inc; - } - break; - } - default: - { - png_size_t pixel_bytes = (row_info->pixel_depth >> 3); - png_bytep sp = row + (png_size_t)(row_info->width - 1) * pixel_bytes; - png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes; - int jstop = png_pass_inc[pass]; - png_uint_32 i; - - for (i = 0; i < row_info->width; i++) - { - png_byte v[8]; - int j; - - png_memcpy(v, sp, pixel_bytes); - for (j = 0; j < jstop; j++) - { - png_memcpy(dp, v, pixel_bytes); - dp -= pixel_bytes; - } - sp -= pixel_bytes; - } - break; - } - } - row_info->width = final_width; - row_info->rowbytes = ((final_width * - (png_uint_32)row_info->pixel_depth + 7) >> 3); - } -} -#endif - -#ifndef PNG_READ_SLOW_FILTERING -void -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, - png_bytep prev_row, int filter) -{ - png_debug(1, "in png_read_filter_row\n"); - png_debug2(2,"row = %d, filter = %d\n", png_ptr->row_number, filter); - - - switch (filter) - { - case PNG_FILTER_VALUE_NONE: - break; - case PNG_FILTER_VALUE_SUB: - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_uint_32 bpp = (row_info->pixel_depth + 7) / 8; - png_bytep rp = row + bpp; - png_bytep lp = row; - - for (i = bpp; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_UP: - { - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - png_bytep rp = row; - png_bytep pp = prev_row; - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_AVG: - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_uint_32 bpp = (row_info->pixel_depth + 7) / 8; - png_uint_32 istop = row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp++) / 2)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(((int)(*rp) + - (int)(*pp++ + *lp++) / 2) & 0xff); - rp++; - } - break; - } - case PNG_FILTER_VALUE_PAETH: - { - png_uint_32 i; - png_bytep rp = row; - png_bytep pp = prev_row; - png_bytep lp = row; - png_bytep cp = prev_row; - png_uint_32 bpp = (row_info->pixel_depth + 7) / 8; - png_uint_32 istop=row_info->rowbytes - bpp; - - for (i = 0; i < bpp; i++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); - rp++; - } - - for (i = 0; i < istop; i++) /* use leftover rp,pp */ - { - int a, b, c, pa, pb, pc, p; - - a = *lp++; - b = *pp++; - c = *cp++; - - p = b - c; - pc = a - c; - -#ifdef PNG_USE_ABS - pa = abs(p); - pb = abs(pc); - pc = abs(p + pc); -#else - pa = p < 0 ? -p : p; - pb = pc < 0 ? -pc : pc; - pc = (p + pc) < 0 ? -(p + pc) : p + pc; -#endif - - /* - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; - */ - - p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; - - *rp = (png_byte)(((int)(*rp) + p) & 0xff); - rp++; - } - break; - } - default: - png_error(png_ptr, "Bad adaptive filter type"); - break; - } -} -#else /* PNG_READ_SLOW_FILTERING */ -void -png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep row, - png_bytep prev_row, int filter) -{ - png_debug(1, "in png_read_filter_row\n"); - png_debug2(2,"row = %d, filter = %d\n", png_ptr->row_number, filter); - - - switch (filter) - { - case PNG_FILTER_VALUE_NONE: - break; - case PNG_FILTER_VALUE_SUB: - { - png_uint_32 i; - int bpp = (row_info->pixel_depth + 7) / 8; - png_bytep rp; - png_bytep lp; - - for (i = (png_uint_32)bpp, rp = row + bpp, lp = row; - i < row_info->rowbytes; i++, rp++, lp++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*lp)) & 0xff); - } - break; - } - case PNG_FILTER_VALUE_UP: - { - png_uint_32 i; - png_bytep rp; - png_bytep pp; - - for (i = 0, rp = row, pp = prev_row; - i < row_info->rowbytes; i++, rp++, pp++) - { - *rp = (png_byte)(((int)(*rp) + (int)(*pp)) & 0xff); - } - break; - } - case PNG_FILTER_VALUE_AVG: - { - png_uint_32 i; - int bpp = (row_info->pixel_depth + 7) / 8; - png_bytep rp; - png_bytep pp; - png_bytep lp; - - for (i = 0, rp = row, pp = prev_row; - i < (png_uint_32)bpp; i++, rp++, pp++) - { - *rp = (png_byte)(((int)(*rp) + - ((int)(*pp) / 2)) & 0xff); - } - for (lp = row; i < row_info->rowbytes; i++, rp++, lp++, pp++) - { - *rp = (png_byte)(((int)(*rp) + - (int)(*pp + *lp) / 2) & 0xff); - } - break; - } - case PNG_FILTER_VALUE_PAETH: - { - int bpp = (row_info->pixel_depth + 7) / 8; - png_uint_32 i; - png_bytep rp; - png_bytep pp; - png_bytep lp; - png_bytep cp; - - for (i = 0, rp = row, pp = prev_row, - lp = row - bpp, cp = prev_row - bpp; - i < row_info->rowbytes; i++, rp++, pp++, lp++, cp++) - { - int a, b, c, pa, pb, pc, p; - - b = *pp; - if (i >= (png_uint_32)bpp) - { - c = *cp; - a = *lp; - } - else - { - a = c = 0; - } - p = a + b - c; - pa = abs(p - a); - pb = abs(p - b); - pc = abs(p - c); - - if (pa <= pb && pa <= pc) - p = a; - else if (pb <= pc) - p = b; - else - p = c; - - *rp = (png_byte)(((int)(*rp) + p) & 0xff); - } - break; - } - default: - png_error(png_ptr, "Bad adaptive filter type"); - break; - } -} -#endif /* PNG_READ_SLOW_FILTERING */ - -void -png_read_finish_row(png_structp png_ptr) -{ - png_debug(1, "in png_read_finish_row\n"); - png_ptr->row_number++; - if (png_ptr->row_number < png_ptr->num_rows) - return; - - if (png_ptr->interlaced) - { - png_ptr->row_number = 0; - png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - do - { - png_ptr->pass++; - if (png_ptr->pass >= 7) - break; - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - png_ptr->irowbytes = ((png_ptr->iwidth * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3) +1; - - if (!(png_ptr->transformations & PNG_INTERLACE)) - { - png_ptr->num_rows = (png_ptr->height + - png_pass_yinc[png_ptr->pass] - 1 - - png_pass_ystart[png_ptr->pass]) / - png_pass_yinc[png_ptr->pass]; - if (!(png_ptr->num_rows)) - continue; - } - else /* if (png_ptr->transformations & PNG_INTERLACE) */ - break; - } while (png_ptr->iwidth == 0); - - if (png_ptr->pass < 7) - return; - } - - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - { - char extra; - int ret; - - png_ptr->zstream.next_out = (Byte *)&extra; - png_ptr->zstream.avail_out = (uInt)1; - for(;;) - { - if (!(png_ptr->zstream.avail_in)) - { - while (!png_ptr->idat_size) - { - png_byte chunk_length[4]; - - png_crc_finish(png_ptr, 0); - - png_read_data(png_ptr, chunk_length, 4); - png_ptr->idat_size = png_get_uint_32(chunk_length); - - png_reset_crc(png_ptr); - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); - - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; - if (png_ptr->zbuf_size > png_ptr->idat_size) - png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; - png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); - png_ptr->idat_size -= png_ptr->zstream.avail_in; - } - ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); - if (ret == Z_STREAM_END) - { - if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || - png_ptr->idat_size) - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; - break; - } - if (ret != Z_OK) - png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : - "Decompression Error"); - - if (!(png_ptr->zstream.avail_out)) - png_error(png_ptr, "Extra compressed data"); - - } - png_ptr->zstream.avail_out = 0; - } - - if (png_ptr->idat_size || png_ptr->zstream.avail_in) - png_error(png_ptr, "Extra compression data"); - - inflateReset(&png_ptr->zstream); - - png_ptr->mode |= PNG_AFTER_IDAT; -} - -void -png_read_start_row(png_structp png_ptr) -{ - int max_pixel_depth; - png_uint_32 row_bytes; - - png_debug(1, "in png_read_start_row\n"); - png_ptr->zstream.avail_in = 0; - png_init_read_transformations(png_ptr); - if (png_ptr->interlaced) - { - if (!(png_ptr->transformations & PNG_INTERLACE)) - png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - - png_pass_ystart[0]) / png_pass_yinc[0]; - else - png_ptr->num_rows = png_ptr->height; - - png_ptr->iwidth = (png_ptr->width + - png_pass_inc[png_ptr->pass] - 1 - - png_pass_start[png_ptr->pass]) / - png_pass_inc[png_ptr->pass]; - - row_bytes = ((png_ptr->iwidth * - (png_uint_32)png_ptr->pixel_depth + 7) >> 3) +1; - png_ptr->irowbytes = (png_size_t)row_bytes; - if((png_uint_32)png_ptr->irowbytes != row_bytes) - png_error(png_ptr, "Rowbytes overflow in png_read_start_row"); - } - else - { - png_ptr->num_rows = png_ptr->height; - png_ptr->iwidth = png_ptr->width; - png_ptr->irowbytes = png_ptr->rowbytes + 1; - } - max_pixel_depth = png_ptr->pixel_depth; - -#if defined(PNG_READ_PACK_SUPPORTED) - if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8) - max_pixel_depth = 8; -#endif - -#if defined(PNG_READ_EXPAND_SUPPORTED) - if (png_ptr->transformations & PNG_EXPAND) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - { - if (png_ptr->num_trans) - max_pixel_depth = 32; - else - max_pixel_depth = 24; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth < 8) - max_pixel_depth = 8; - if (png_ptr->num_trans) - max_pixel_depth *= 2; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - if (png_ptr->num_trans) - { - max_pixel_depth *= 4; - max_pixel_depth /= 3; - } - } - } -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) - if (png_ptr->transformations & (PNG_FILLER)) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - max_pixel_depth = 32; - else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) - { - if (max_pixel_depth <= 8) - max_pixel_depth = 16; - else - max_pixel_depth = 32; - } - else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) - { - if (max_pixel_depth <= 32) - max_pixel_depth = 32; - else - max_pixel_depth = 64; - } - } -#endif - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) - if (png_ptr->transformations & PNG_GRAY_TO_RGB) - { - if ((png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || - png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) - { - if (max_pixel_depth <= 16) - max_pixel_depth = 32; - else if (max_pixel_depth <= 32) - max_pixel_depth = 64; - } - else - { - if (max_pixel_depth <= 8) - max_pixel_depth = 24; - else if (max_pixel_depth <= 16) - max_pixel_depth = 48; - } - } -#endif - - /* align the width on the next larger 8 pixels. Mainly used - for interlacing */ - row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7)); - /* calculate the maximum bytes needed, adding a byte and a pixel - for safety's sake */ - row_bytes = ((row_bytes * (png_uint_32)max_pixel_depth + 7) >> 3) + - 1 + ((max_pixel_depth + 7) >> 3); -#ifdef PNG_MAX_MALLOC_64K - if (row_bytes > (png_uint_32)65536L) - png_error(png_ptr, "This image requires a row greater than 64KB"); -#endif - png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, row_bytes); - -#ifdef PNG_MAX_MALLOC_64K - if ((png_uint_32)png_ptr->rowbytes + 1 > (png_uint_32)65536L) - png_error(png_ptr, "This image requires a row greater than 64KB"); -#endif - png_ptr->prev_row = (png_bytep)png_malloc(png_ptr, (png_uint_32)( - png_ptr->rowbytes + 1)); - - png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); - - png_debug1(3, "width = %d,\n", png_ptr->width); - png_debug1(3, "height = %d,\n", png_ptr->height); - png_debug1(3, "iwidth = %d,\n", png_ptr->iwidth); - png_debug1(3, "num_rows = %d\n", png_ptr->num_rows); - png_debug1(3, "rowbytes = %d,\n", png_ptr->rowbytes); - png_debug1(3, "irowbytes = %d,\n", png_ptr->irowbytes); - - png_ptr->flags |= PNG_FLAG_ROW_INIT; -} - + +/* pngrutil.c - utilities to read a PNG file + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * This file contains routines that are only called from within + * libpng itself during the course of reading an image. + */ + +#include "pngpriv.h" + +#ifdef PNG_READ_SUPPORTED + +#define png_strtod(p,a,b) strtod(a,b) + +png_uint_32 PNGAPI +png_get_uint_31(png_structp png_ptr, png_const_bytep buf) +{ + png_uint_32 uval = png_get_uint_32(buf); + + if (uval > PNG_UINT_31_MAX) + png_error(png_ptr, "PNG unsigned integer out of range"); + + return (uval); +} + +#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_READ_cHRM_SUPPORTED) +/* The following is a variation on the above for use with the fixed + * point values used for gAMA and cHRM. Instead of png_error it + * issues a warning and returns (-1) - an invalid value because both + * gAMA and cHRM use *unsigned* integers for fixed point values. + */ +#define PNG_FIXED_ERROR (-1) + +static png_fixed_point /* PRIVATE */ +png_get_fixed_point(png_structp png_ptr, png_const_bytep buf) +{ + png_uint_32 uval = png_get_uint_32(buf); + + if (uval <= PNG_UINT_31_MAX) + return (png_fixed_point)uval; /* known to be in range */ + + /* The caller can turn off the warning by passing NULL. */ + if (png_ptr != NULL) + png_warning(png_ptr, "PNG fixed point integer out of range"); + + return PNG_FIXED_ERROR; +} +#endif + +#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED +/* NOTE: the read macros will obscure these definitions, so that if + * PNG_USE_READ_MACROS is set the library will not use them internally, + * but the APIs will still be available externally. + * + * The parentheses around "PNGAPI function_name" in the following three + * functions are necessary because they allow the macros to co-exist with + * these (unused but exported) functions. + */ + +/* Grab an unsigned 32-bit integer from a buffer in big-endian format. */ +png_uint_32 (PNGAPI +png_get_uint_32)(png_const_bytep buf) +{ + png_uint_32 uval = + ((png_uint_32)(*(buf )) << 24) + + ((png_uint_32)(*(buf + 1)) << 16) + + ((png_uint_32)(*(buf + 2)) << 8) + + ((png_uint_32)(*(buf + 3)) ) ; + + return uval; +} + +/* Grab a signed 32-bit integer from a buffer in big-endian format. The + * data is stored in the PNG file in two's complement format and there + * is no guarantee that a 'png_int_32' is exactly 32 bits, therefore + * the following code does a two's complement to native conversion. + */ +png_int_32 (PNGAPI +png_get_int_32)(png_const_bytep buf) +{ + png_uint_32 uval = png_get_uint_32(buf); + if ((uval & 0x80000000) == 0) /* non-negative */ + return uval; + + uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */ + return -(png_int_32)uval; +} + +/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */ +png_uint_16 (PNGAPI +png_get_uint_16)(png_const_bytep buf) +{ + /* ANSI-C requires an int value to accomodate at least 16 bits so this + * works and allows the compiler not to worry about possible narrowing + * on 32 bit systems. (Pre-ANSI systems did not make integers smaller + * than 16 bits either.) + */ + unsigned int val = + ((unsigned int)(*buf) << 8) + + ((unsigned int)(*(buf + 1))); + + return (png_uint_16)val; +} + +#endif /* PNG_READ_INT_FUNCTIONS_SUPPORTED */ + +/* Read and check the PNG file signature */ +void /* PRIVATE */ +png_read_sig(png_structp png_ptr, png_infop info_ptr) +{ + png_size_t num_checked, num_to_check; + + /* Exit if the user application does not expect a signature. */ + if (png_ptr->sig_bytes >= 8) + return; + + num_checked = png_ptr->sig_bytes; + num_to_check = 8 - num_checked; + +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_SIGNATURE; +#endif + + /* The signature must be serialized in a single I/O call. */ + png_read_data(png_ptr, &(info_ptr->signature[num_checked]), num_to_check); + png_ptr->sig_bytes = 8; + + if (png_sig_cmp(info_ptr->signature, num_checked, num_to_check)) + { + if (num_checked < 4 && + png_sig_cmp(info_ptr->signature, num_checked, num_to_check - 4)) + png_error(png_ptr, "Not a PNG file"); + else + png_error(png_ptr, "PNG file corrupted by ASCII conversion"); + } + if (num_checked < 3) + png_ptr->mode |= PNG_HAVE_PNG_SIGNATURE; +} + +/* Read the chunk header (length + type name). + * Put the type name into png_ptr->chunk_name, and return the length. + */ +png_uint_32 /* PRIVATE */ +png_read_chunk_header(png_structp png_ptr) +{ + png_byte buf[8]; + png_uint_32 length; + +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_HDR; +#endif + + /* Read the length and the chunk name. + * This must be performed in a single I/O call. + */ + png_read_data(png_ptr, buf, 8); + length = png_get_uint_31(png_ptr, buf); + + /* Put the chunk name into png_ptr->chunk_name. */ + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(buf+4); + + png_debug2(0, "Reading %lx chunk, length = %lu", + (unsigned long)png_ptr->chunk_name, (unsigned long)length); + + /* Reset the crc and run it over the chunk name. */ + png_reset_crc(png_ptr); + png_calculate_crc(png_ptr, buf + 4, 4); + + /* Check to see if chunk name is valid. */ + png_check_chunk_name(png_ptr, png_ptr->chunk_name); + +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_DATA; +#endif + + return length; +} + +/* Read data, and (optionally) run it through the CRC. */ +void /* PRIVATE */ +png_crc_read(png_structp png_ptr, png_bytep buf, png_size_t length) +{ + if (png_ptr == NULL) + return; + + png_read_data(png_ptr, buf, length); + png_calculate_crc(png_ptr, buf, length); +} + +/* Optionally skip data and then check the CRC. Depending on whether we + * are reading a ancillary or critical chunk, and how the program has set + * things up, we may calculate the CRC on the data and print a message. + * Returns '1' if there was a CRC error, '0' otherwise. + */ +int /* PRIVATE */ +png_crc_finish(png_structp png_ptr, png_uint_32 skip) +{ + png_size_t i; + png_size_t istop = png_ptr->zbuf_size; + + for (i = (png_size_t)skip; i > istop; i -= istop) + { + png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size); + } + + if (i) + { + png_crc_read(png_ptr, png_ptr->zbuf, i); + } + + if (png_crc_error(png_ptr)) + { + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name) ? + !(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) : + (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_USE)) + { + png_chunk_warning(png_ptr, "CRC error"); + } + + else + { + png_chunk_benign_error(png_ptr, "CRC error"); + return (0); + } + + return (1); + } + + return (0); +} + +/* Compare the CRC stored in the PNG file with that calculated by libpng from + * the data it has read thus far. + */ +int /* PRIVATE */ +png_crc_error(png_structp png_ptr) +{ + png_byte crc_bytes[4]; + png_uint_32 crc; + int need_crc = 1; + + if (PNG_CHUNK_ANCILLIARY(png_ptr->chunk_name)) + { + if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == + (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) + need_crc = 0; + } + + else /* critical */ + { + if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) + need_crc = 0; + } + +#ifdef PNG_IO_STATE_SUPPORTED + png_ptr->io_state = PNG_IO_READING | PNG_IO_CHUNK_CRC; +#endif + + /* The chunk CRC must be serialized in a single I/O call. */ + png_read_data(png_ptr, crc_bytes, 4); + + if (need_crc) + { + crc = png_get_uint_32(crc_bytes); + return ((int)(crc != png_ptr->crc)); + } + + else + return (0); +} + +#ifdef PNG_READ_COMPRESSED_TEXT_SUPPORTED +static png_size_t +png_inflate(png_structp png_ptr, png_bytep data, png_size_t size, + png_bytep output, png_size_t output_size) +{ + png_size_t count = 0; + + /* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't + * even necessarily handle 65536 bytes) because the type uInt is "16 bits or + * more". Consequently it is necessary to chunk the input to zlib. This + * code uses ZLIB_IO_MAX, from pngpriv.h, as the maximum (the maximum value + * that can be stored in a uInt.) It is possible to set ZLIB_IO_MAX to a + * lower value in pngpriv.h and this may sometimes have a performance + * advantage, because it forces access of the input data to be separated from + * at least some of the use by some period of time. + */ + png_ptr->zstream.next_in = data; + /* avail_in is set below from 'size' */ + png_ptr->zstream.avail_in = 0; + + while (1) + { + int ret, avail; + + /* The setting of 'avail_in' used to be outside the loop; by setting it + * inside it is possible to chunk the input to zlib and simply rely on + * zlib to advance the 'next_in' pointer. This allows arbitrary amounts o + * data to be passed through zlib at the unavoidable cost of requiring a + * window save (memcpy of up to 32768 output bytes) every ZLIB_IO_MAX + * input bytes. + */ + if (png_ptr->zstream.avail_in == 0 && size > 0) + { + if (size <= ZLIB_IO_MAX) + { + /* The value is less than ZLIB_IO_MAX so the cast is safe: */ + png_ptr->zstream.avail_in = (uInt)size; + size = 0; + } + + else + { + png_ptr->zstream.avail_in = ZLIB_IO_MAX; + size -= ZLIB_IO_MAX; + } + } + + /* Reset the output buffer each time round - we empty it + * after every inflate call. + */ + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = png_ptr->zbuf_size; + + ret = inflate(&png_ptr->zstream, Z_NO_FLUSH); + avail = png_ptr->zbuf_size - png_ptr->zstream.avail_out; + + /* First copy/count any new output - but only if we didn't + * get an error code. + */ + if ((ret == Z_OK || ret == Z_STREAM_END) && avail > 0) + { + png_size_t space = avail; /* > 0, see above */ + + if (output != 0 && output_size > count) + { + png_size_t copy = output_size - count; + + if (space < copy) + copy = space; + + png_memcpy(output + count, png_ptr->zbuf, copy); + } + count += space; + } + + if (ret == Z_OK) + continue; + + /* Termination conditions - always reset the zstream, it + * must be left in inflateInit state. + */ + png_ptr->zstream.avail_in = 0; + inflateReset(&png_ptr->zstream); + + if (ret == Z_STREAM_END) + return count; /* NOTE: may be zero. */ + + /* Now handle the error codes - the API always returns 0 + * and the error message is dumped into the uncompressed + * buffer if available. + */ +# ifdef PNG_WARNINGS_SUPPORTED + { + png_const_charp msg; + + if (png_ptr->zstream.msg != 0) + msg = png_ptr->zstream.msg; + + else switch (ret) + { + case Z_BUF_ERROR: + msg = "Buffer error in compressed datastream"; + break; + + case Z_DATA_ERROR: + msg = "Data error in compressed datastream"; + break; + + default: + msg = "Incomplete compressed datastream"; + break; + } + + png_chunk_warning(png_ptr, msg); + } +# endif + + /* 0 means an error - notice that this code simply ignores + * zero length compressed chunks as a result. + */ + return 0; + } +} + +/* + * Decompress trailing data in a chunk. The assumption is that chunkdata + * points at an allocated area holding the contents of a chunk with a + * trailing compressed part. What we get back is an allocated area + * holding the original prefix part and an uncompressed version of the + * trailing part (the malloc area passed in is freed). + */ +void /* PRIVATE */ +png_decompress_chunk(png_structp png_ptr, int comp_type, + png_size_t chunklength, + png_size_t prefix_size, png_size_t *newlength) +{ + /* The caller should guarantee this */ + if (prefix_size > chunklength) + { + /* The recovery is to delete the chunk. */ + png_warning(png_ptr, "invalid chunklength"); + prefix_size = 0; /* To delete everything */ + } + + else if (comp_type == PNG_COMPRESSION_TYPE_BASE) + { + png_size_t expanded_size = png_inflate(png_ptr, + (png_bytep)(png_ptr->chunkdata + prefix_size), + chunklength - prefix_size, + 0, /* output */ + 0); /* output size */ + + /* Now check the limits on this chunk - if the limit fails the + * compressed data will be removed, the prefix will remain. + */ +#ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED + if (png_ptr->user_chunk_malloc_max && + (prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1)) +#else +# ifdef PNG_USER_CHUNK_MALLOC_MAX + if ((PNG_USER_CHUNK_MALLOC_MAX > 0) && + prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1) +# endif +#endif + png_warning(png_ptr, "Exceeded size limit while expanding chunk"); + + /* If the size is zero either there was an error and a message + * has already been output (warning) or the size really is zero + * and we have nothing to do - the code will exit through the + * error case below. + */ +#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \ + defined(PNG_USER_CHUNK_MALLOC_MAX) + else if (expanded_size > 0) +#else + if (expanded_size > 0) +#endif + { + /* Success (maybe) - really uncompress the chunk. */ + png_size_t new_size = 0; + png_charp text = (png_charp)png_malloc_warn(png_ptr, + prefix_size + expanded_size + 1); + + if (text != NULL) + { + png_memcpy(text, png_ptr->chunkdata, prefix_size); + new_size = png_inflate(png_ptr, + (png_bytep)(png_ptr->chunkdata + prefix_size), + chunklength - prefix_size, + (png_bytep)(text + prefix_size), expanded_size); + text[prefix_size + expanded_size] = 0; /* just in case */ + + if (new_size == expanded_size) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = text; + *newlength = prefix_size + expanded_size; + return; /* The success return! */ + } + + png_warning(png_ptr, "png_inflate logic error"); + png_free(png_ptr, text); + } + + else + png_warning(png_ptr, "Not enough memory to decompress chunk"); + } + } + + else /* if (comp_type != PNG_COMPRESSION_TYPE_BASE) */ + { + PNG_WARNING_PARAMETERS(p) + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type); + png_formatted_warning(png_ptr, p, "Unknown compression type @1"); + + /* The recovery is to simply drop the data. */ + } + + /* Generic error return - leave the prefix, delete the compressed + * data, reallocate the chunkdata to remove the potentially large + * amount of compressed data. + */ + { + png_charp text = (png_charp)png_malloc_warn(png_ptr, prefix_size + 1); + + if (text != NULL) + { + if (prefix_size > 0) + png_memcpy(text, png_ptr->chunkdata, prefix_size); + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = text; + + /* This is an extra zero in the 'uncompressed' part. */ + *(png_ptr->chunkdata + prefix_size) = 0x00; + } + /* Ignore a malloc error here - it is safe. */ + } + + *newlength = prefix_size; +} +#endif /* PNG_READ_COMPRESSED_TEXT_SUPPORTED */ + +/* Read and check the IDHR chunk */ +void /* PRIVATE */ +png_handle_IHDR(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte buf[13]; + png_uint_32 width, height; + int bit_depth, color_type, compression_type, filter_type; + int interlace_type; + + png_debug(1, "in png_handle_IHDR"); + + if (png_ptr->mode & PNG_HAVE_IHDR) + png_error(png_ptr, "Out of place IHDR"); + + /* Check the length */ + if (length != 13) + png_error(png_ptr, "Invalid IHDR chunk"); + + png_ptr->mode |= PNG_HAVE_IHDR; + + png_crc_read(png_ptr, buf, 13); + png_crc_finish(png_ptr, 0); + + width = png_get_uint_31(png_ptr, buf); + height = png_get_uint_31(png_ptr, buf + 4); + bit_depth = buf[8]; + color_type = buf[9]; + compression_type = buf[10]; + filter_type = buf[11]; + interlace_type = buf[12]; + + /* Set internal variables */ + png_ptr->width = width; + png_ptr->height = height; + png_ptr->bit_depth = (png_byte)bit_depth; + png_ptr->interlaced = (png_byte)interlace_type; + png_ptr->color_type = (png_byte)color_type; +#ifdef PNG_MNG_FEATURES_SUPPORTED + png_ptr->filter_type = (png_byte)filter_type; +#endif + png_ptr->compression_type = (png_byte)compression_type; + + /* Find number of channels */ + switch (png_ptr->color_type) + { + default: /* invalid, png_set_IHDR calls png_error */ + case PNG_COLOR_TYPE_GRAY: + case PNG_COLOR_TYPE_PALETTE: + png_ptr->channels = 1; + break; + + case PNG_COLOR_TYPE_RGB: + png_ptr->channels = 3; + break; + + case PNG_COLOR_TYPE_GRAY_ALPHA: + png_ptr->channels = 2; + break; + + case PNG_COLOR_TYPE_RGB_ALPHA: + png_ptr->channels = 4; + break; + } + + /* Set up other useful info */ + png_ptr->pixel_depth = (png_byte)(png_ptr->bit_depth * + png_ptr->channels); + png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->width); + png_debug1(3, "bit_depth = %d", png_ptr->bit_depth); + png_debug1(3, "channels = %d", png_ptr->channels); + png_debug1(3, "rowbytes = %lu", (unsigned long)png_ptr->rowbytes); + png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, + color_type, interlace_type, compression_type, filter_type); +} + +/* Read and check the palette */ +void /* PRIVATE */ +png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_color palette[PNG_MAX_PALETTE_LENGTH]; + int num, i; +#ifdef PNG_POINTER_INDEXING_SUPPORTED + png_colorp pal_ptr; +#endif + + png_debug(1, "in png_handle_PLTE"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before PLTE"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid PLTE after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + png_error(png_ptr, "Duplicate PLTE chunk"); + + png_ptr->mode |= PNG_HAVE_PLTE; + + if (!(png_ptr->color_type&PNG_COLOR_MASK_COLOR)) + { + png_warning(png_ptr, + "Ignoring PLTE chunk in grayscale PNG"); + png_crc_finish(png_ptr, length); + return; + } + +#ifndef PNG_READ_OPT_PLTE_SUPPORTED + if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + { + png_crc_finish(png_ptr, length); + return; + } +#endif + + if (length > 3*PNG_MAX_PALETTE_LENGTH || length % 3) + { + if (png_ptr->color_type != PNG_COLOR_TYPE_PALETTE) + { + png_warning(png_ptr, "Invalid palette chunk"); + png_crc_finish(png_ptr, length); + return; + } + + else + { + png_error(png_ptr, "Invalid palette chunk"); + } + } + + num = (int)length / 3; + +#ifdef PNG_POINTER_INDEXING_SUPPORTED + for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++) + { + png_byte buf[3]; + + png_crc_read(png_ptr, buf, 3); + pal_ptr->red = buf[0]; + pal_ptr->green = buf[1]; + pal_ptr->blue = buf[2]; + } +#else + for (i = 0; i < num; i++) + { + png_byte buf[3]; + + png_crc_read(png_ptr, buf, 3); + /* Don't depend upon png_color being any order */ + palette[i].red = buf[0]; + palette[i].green = buf[1]; + palette[i].blue = buf[2]; + } +#endif + + /* If we actually need the PLTE chunk (ie for a paletted image), we do + * whatever the normal CRC configuration tells us. However, if we + * have an RGB image, the PLTE can be considered ancillary, so + * we will act as though it is. + */ +#ifndef PNG_READ_OPT_PLTE_SUPPORTED + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) +#endif + { + png_crc_finish(png_ptr, 0); + } + +#ifndef PNG_READ_OPT_PLTE_SUPPORTED + else if (png_crc_error(png_ptr)) /* Only if we have a CRC error */ + { + /* If we don't want to use the data from an ancillary chunk, + * we have two options: an error abort, or a warning and we + * ignore the data in this chunk (which should be OK, since + * it's considered ancillary for a RGB or RGBA image). + */ + if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_USE)) + { + if (png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN) + { + png_chunk_benign_error(png_ptr, "CRC error"); + } + + else + { + png_chunk_warning(png_ptr, "CRC error"); + return; + } + } + + /* Otherwise, we (optionally) emit a warning and use the chunk. */ + else if (!(png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_NOWARN)) + { + png_chunk_warning(png_ptr, "CRC error"); + } + } +#endif + + png_set_PLTE(png_ptr, info_ptr, palette, num); + +#ifdef PNG_READ_tRNS_SUPPORTED + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) + { + if (png_ptr->num_trans > (png_uint_16)num) + { + png_warning(png_ptr, "Truncating incorrect tRNS chunk length"); + png_ptr->num_trans = (png_uint_16)num; + } + + if (info_ptr->num_trans > (png_uint_16)num) + { + png_warning(png_ptr, "Truncating incorrect info tRNS chunk length"); + info_ptr->num_trans = (png_uint_16)num; + } + } + } +#endif + +} + +void /* PRIVATE */ +png_handle_IEND(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_debug(1, "in png_handle_IEND"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR) || !(png_ptr->mode & PNG_HAVE_IDAT)) + { + png_error(png_ptr, "No image in file"); + } + + png_ptr->mode |= (PNG_AFTER_IDAT | PNG_HAVE_IEND); + + if (length != 0) + { + png_warning(png_ptr, "Incorrect IEND chunk length"); + } + + png_crc_finish(png_ptr, length); + + PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ +} + +#ifdef PNG_READ_gAMA_SUPPORTED +void /* PRIVATE */ +png_handle_gAMA(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_fixed_point igamma; + png_byte buf[4]; + + png_debug(1, "in png_handle_gAMA"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before gAMA"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid gAMA after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + /* Should be an error, but we can cope with it */ + png_warning(png_ptr, "Out of place gAMA chunk"); + + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA) +#ifdef PNG_READ_sRGB_SUPPORTED + && !(info_ptr->valid & PNG_INFO_sRGB) +#endif + ) + { + png_warning(png_ptr, "Duplicate gAMA chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (length != 4) + { + png_warning(png_ptr, "Incorrect gAMA chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 4); + + if (png_crc_finish(png_ptr, 0)) + return; + + igamma = png_get_fixed_point(NULL, buf); + + /* Check for zero gamma or an error. */ + if (igamma <= 0) + { + png_warning(png_ptr, + "Ignoring gAMA chunk with out of range gamma"); + + return; + } + +# ifdef PNG_READ_sRGB_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) + { + if (PNG_OUT_OF_RANGE(igamma, 45500, 500)) + { + PNG_WARNING_PARAMETERS(p) + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, igamma); + png_formatted_warning(png_ptr, p, + "Ignoring incorrect gAMA value @1 when sRGB is also present"); + return; + } + } +# endif /* PNG_READ_sRGB_SUPPORTED */ + +# ifdef PNG_READ_GAMMA_SUPPORTED + /* Gamma correction on read is supported. */ + png_ptr->gamma = igamma; +# endif + /* And set the 'info' structure members. */ + png_set_gAMA_fixed(png_ptr, info_ptr, igamma); +} +#endif + +#ifdef PNG_READ_sBIT_SUPPORTED +void /* PRIVATE */ +png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_size_t truelen; + png_byte buf[4]; + + png_debug(1, "in png_handle_sBIT"); + + buf[0] = buf[1] = buf[2] = buf[3] = 0; + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before sBIT"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid sBIT after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + { + /* Should be an error, but we can cope with it */ + png_warning(png_ptr, "Out of place sBIT chunk"); + } + + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sBIT)) + { + png_warning(png_ptr, "Duplicate sBIT chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + truelen = 3; + + else + truelen = (png_size_t)png_ptr->channels; + + if (length != truelen || length > 4) + { + png_warning(png_ptr, "Incorrect sBIT chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, truelen); + + if (png_crc_finish(png_ptr, 0)) + return; + + if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + { + png_ptr->sig_bit.red = buf[0]; + png_ptr->sig_bit.green = buf[1]; + png_ptr->sig_bit.blue = buf[2]; + png_ptr->sig_bit.alpha = buf[3]; + } + + else + { + png_ptr->sig_bit.gray = buf[0]; + png_ptr->sig_bit.red = buf[0]; + png_ptr->sig_bit.green = buf[0]; + png_ptr->sig_bit.blue = buf[0]; + png_ptr->sig_bit.alpha = buf[1]; + } + + png_set_sBIT(png_ptr, info_ptr, &(png_ptr->sig_bit)); +} +#endif + +#ifdef PNG_READ_cHRM_SUPPORTED +void /* PRIVATE */ +png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte buf[32]; + png_fixed_point x_white, y_white, x_red, y_red, x_green, y_green, x_blue, + y_blue; + + png_debug(1, "in png_handle_cHRM"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before cHRM"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid cHRM after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + /* Should be an error, but we can cope with it */ + png_warning(png_ptr, "Out of place cHRM chunk"); + + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM) +# ifdef PNG_READ_sRGB_SUPPORTED + && !(info_ptr->valid & PNG_INFO_sRGB) +# endif + ) + { + png_warning(png_ptr, "Duplicate cHRM chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (length != 32) + { + png_warning(png_ptr, "Incorrect cHRM chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 32); + + if (png_crc_finish(png_ptr, 0)) + return; + + x_white = png_get_fixed_point(NULL, buf); + y_white = png_get_fixed_point(NULL, buf + 4); + x_red = png_get_fixed_point(NULL, buf + 8); + y_red = png_get_fixed_point(NULL, buf + 12); + x_green = png_get_fixed_point(NULL, buf + 16); + y_green = png_get_fixed_point(NULL, buf + 20); + x_blue = png_get_fixed_point(NULL, buf + 24); + y_blue = png_get_fixed_point(NULL, buf + 28); + + if (x_white == PNG_FIXED_ERROR || + y_white == PNG_FIXED_ERROR || + x_red == PNG_FIXED_ERROR || + y_red == PNG_FIXED_ERROR || + x_green == PNG_FIXED_ERROR || + y_green == PNG_FIXED_ERROR || + x_blue == PNG_FIXED_ERROR || + y_blue == PNG_FIXED_ERROR) + { + png_warning(png_ptr, "Ignoring cHRM chunk with negative chromaticities"); + return; + } + +#ifdef PNG_READ_sRGB_SUPPORTED + if ((info_ptr != NULL) && (info_ptr->valid & PNG_INFO_sRGB)) + { + if (PNG_OUT_OF_RANGE(x_white, 31270, 1000) || + PNG_OUT_OF_RANGE(y_white, 32900, 1000) || + PNG_OUT_OF_RANGE(x_red, 64000, 1000) || + PNG_OUT_OF_RANGE(y_red, 33000, 1000) || + PNG_OUT_OF_RANGE(x_green, 30000, 1000) || + PNG_OUT_OF_RANGE(y_green, 60000, 1000) || + PNG_OUT_OF_RANGE(x_blue, 15000, 1000) || + PNG_OUT_OF_RANGE(y_blue, 6000, 1000)) + { + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, x_white); + png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_fixed, y_white); + png_warning_parameter_signed(p, 3, PNG_NUMBER_FORMAT_fixed, x_red); + png_warning_parameter_signed(p, 4, PNG_NUMBER_FORMAT_fixed, y_red); + png_warning_parameter_signed(p, 5, PNG_NUMBER_FORMAT_fixed, x_green); + png_warning_parameter_signed(p, 6, PNG_NUMBER_FORMAT_fixed, y_green); + png_warning_parameter_signed(p, 7, PNG_NUMBER_FORMAT_fixed, x_blue); + png_warning_parameter_signed(p, 8, PNG_NUMBER_FORMAT_fixed, y_blue); + + png_formatted_warning(png_ptr, p, + "Ignoring incorrect cHRM white(@1,@2) r(@3,@4)g(@5,@6)b(@7,@8) " + "when sRGB is also present"); + } + return; + } +#endif /* PNG_READ_sRGB_SUPPORTED */ + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Store the _white values as default coefficients for the rgb to gray + * operation if it is supported. Check if the transform is already set to + * avoid destroying the transform values. + */ + if (!png_ptr->rgb_to_gray_coefficients_set) + { + /* png_set_background has not been called and we haven't seen an sRGB + * chunk yet. Find the XYZ of the three end points. + */ + png_XYZ XYZ; + png_xy xy; + + xy.redx = x_red; + xy.redy = y_red; + xy.greenx = x_green; + xy.greeny = y_green; + xy.bluex = x_blue; + xy.bluey = y_blue; + xy.whitex = x_white; + xy.whitey = y_white; + + if (png_XYZ_from_xy_checked(png_ptr, &XYZ, xy)) + { + /* The success case, because XYZ_from_xy normalises to a reference + * white Y of 1.0 we just need to scale the numbers. This should + * always work just fine. It is an internal error if this overflows. + */ + { + png_fixed_point r, g, b; + if (png_muldiv(&r, XYZ.redY, 32768, PNG_FP_1) && + r >= 0 && r <= 32768 && + png_muldiv(&g, XYZ.greenY, 32768, PNG_FP_1) && + g >= 0 && g <= 32768 && + png_muldiv(&b, XYZ.blueY, 32768, PNG_FP_1) && + b >= 0 && b <= 32768 && + r+g+b <= 32769) + { + /* We allow 0 coefficients here. r+g+b may be 32769 if two or + * all of the coefficients were rounded up. Handle this by + * reducing the *largest* coefficient by 1; this matches the + * approach used for the default coefficients in pngrtran.c + */ + int add = 0; + + if (r+g+b > 32768) + add = -1; + else if (r+g+b < 32768) + add = 1; + + if (add != 0) + { + if (g >= r && g >= b) + g += add; + else if (r >= g && r >= b) + r += add; + else + b += add; + } + + /* Check for an internal error. */ + if (r+g+b != 32768) + png_error(png_ptr, + "internal error handling cHRM coefficients"); + + png_ptr->rgb_to_gray_red_coeff = (png_uint_16)r; + png_ptr->rgb_to_gray_green_coeff = (png_uint_16)g; + } + + /* This is a png_error at present even though it could be ignored - + * it should never happen, but it is important that if it does, the + * bug is fixed. + */ + else + png_error(png_ptr, "internal error handling cHRM->XYZ"); + } + } + } +#endif + + png_set_cHRM_fixed(png_ptr, info_ptr, x_white, y_white, x_red, y_red, + x_green, y_green, x_blue, y_blue); +} +#endif + +#ifdef PNG_READ_sRGB_SUPPORTED +void /* PRIVATE */ +png_handle_sRGB(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + int intent; + png_byte buf[1]; + + png_debug(1, "in png_handle_sRGB"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before sRGB"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid sRGB after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + /* Should be an error, but we can cope with it */ + png_warning(png_ptr, "Out of place sRGB chunk"); + + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sRGB)) + { + png_warning(png_ptr, "Duplicate sRGB chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (length != 1) + { + png_warning(png_ptr, "Incorrect sRGB chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 1); + + if (png_crc_finish(png_ptr, 0)) + return; + + intent = buf[0]; + + /* Check for bad intent */ + if (intent >= PNG_sRGB_INTENT_LAST) + { + png_warning(png_ptr, "Unknown sRGB intent"); + return; + } + +#if defined(PNG_READ_gAMA_SUPPORTED) && defined(PNG_READ_GAMMA_SUPPORTED) + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_gAMA)) + { + if (PNG_OUT_OF_RANGE(info_ptr->gamma, 45500, 500)) + { + PNG_WARNING_PARAMETERS(p) + + png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_fixed, + info_ptr->gamma); + + png_formatted_warning(png_ptr, p, + "Ignoring incorrect gAMA value @1 when sRGB is also present"); + } + } +#endif /* PNG_READ_gAMA_SUPPORTED */ + +#ifdef PNG_READ_cHRM_SUPPORTED + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_cHRM)) + if (PNG_OUT_OF_RANGE(info_ptr->x_white, 31270, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_white, 32900, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_red, 64000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_red, 33000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_green, 30000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_green, 60000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->x_blue, 15000, 1000) || + PNG_OUT_OF_RANGE(info_ptr->y_blue, 6000, 1000)) + { + png_warning(png_ptr, + "Ignoring incorrect cHRM value when sRGB is also present"); + } +#endif /* PNG_READ_cHRM_SUPPORTED */ + + /* This is recorded for use when handling the cHRM chunk above. An sRGB + * chunk unconditionally overwrites the coefficients for grayscale conversion + * too. + */ + png_ptr->is_sRGB = 1; + +# ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + /* Don't overwrite user supplied values: */ + if (!png_ptr->rgb_to_gray_coefficients_set) + { + /* These numbers come from the sRGB specification (or, since one has to + * pay much money to get a copy, the wikipedia sRGB page) the + * chromaticity values quoted have been inverted to get the reverse + * transformation from RGB to XYZ and the 'Y' coefficients scaled by + * 32768 (then rounded). + * + * sRGB and ITU Rec-709 both truncate the values for the D65 white + * point to four digits and, even though it actually stores five + * digits, the PNG spec gives the truncated value. + * + * This means that when the chromaticities are converted back to XYZ + * end points we end up with (6968,23435,2366), which, as described in + * pngrtran.c, would overflow. If the five digit precision and up is + * used we get, instead: + * + * 6968*R + 23435*G + 2365*B + * + * (Notice that this rounds the blue coefficient down, rather than the + * choice used in pngrtran.c which is to round the green one down.) + */ + png_ptr->rgb_to_gray_red_coeff = 6968; /* 0.212639005871510 */ + png_ptr->rgb_to_gray_green_coeff = 23434; /* 0.715168678767756 */ + /* png_ptr->rgb_to_gray_blue_coeff = 2366; 0.072192315360734 */ + + /* The following keeps the cHRM chunk from destroying the + * coefficients again in the event that it follows the sRGB chunk. + */ + png_ptr->rgb_to_gray_coefficients_set = 1; + } +# endif + + png_set_sRGB_gAMA_and_cHRM(png_ptr, info_ptr, intent); +} +#endif /* PNG_READ_sRGB_SUPPORTED */ + +#ifdef PNG_READ_iCCP_SUPPORTED +void /* PRIVATE */ +png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +/* Note: this does not properly handle chunks that are > 64K under DOS */ +{ + png_byte compression_type; + png_bytep pC; + png_charp profile; + png_uint_32 skip = 0; + png_uint_32 profile_size; + png_alloc_size_t profile_length; + png_size_t slength, prefix_length, data_length; + + png_debug(1, "in png_handle_iCCP"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before iCCP"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid iCCP after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->mode & PNG_HAVE_PLTE) + /* Should be an error, but we can cope with it */ + png_warning(png_ptr, "Out of place iCCP chunk"); + + if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP)) + { + png_warning(png_ptr, "Duplicate iCCP chunk"); + png_crc_finish(png_ptr, length); + return; + } + +#ifdef PNG_MAX_MALLOC_64K + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "iCCP chunk too large to fit in memory"); + skip = length - (png_uint_32)65535L; + length = (png_uint_32)65535L; + } +#endif + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, skip)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_ptr->chunkdata[slength] = 0x00; + + for (profile = png_ptr->chunkdata; *profile; profile++) + /* Empty loop to find end of name */ ; + + ++profile; + + /* There should be at least one zero (the compression type byte) + * following the separator, and we should be on it + */ + if (profile >= png_ptr->chunkdata + slength - 1) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "Malformed iCCP chunk"); + return; + } + + /* Compression_type should always be zero */ + compression_type = *profile++; + + if (compression_type) + { + png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk"); + compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8 + wrote nonzero) */ + } + + prefix_length = profile - png_ptr->chunkdata; + png_decompress_chunk(png_ptr, compression_type, + slength, prefix_length, &data_length); + + profile_length = data_length - prefix_length; + + if (prefix_length > data_length || profile_length < 4) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "Profile size field missing from iCCP chunk"); + return; + } + + /* Check the profile_size recorded in the first 32 bits of the ICC profile */ + pC = (png_bytep)(png_ptr->chunkdata + prefix_length); + profile_size = ((*(pC )) << 24) | + ((*(pC + 1)) << 16) | + ((*(pC + 2)) << 8) | + ((*(pC + 3)) ); + + /* NOTE: the following guarantees that 'profile_length' fits into 32 bits, + * because profile_size is a 32 bit value. + */ + if (profile_size < profile_length) + profile_length = profile_size; + + /* And the following guarantees that profile_size == profile_length. */ + if (profile_size > profile_length) + { + PNG_WARNING_PARAMETERS(p) + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + + png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_u, profile_size); + png_warning_parameter_unsigned(p, 2, PNG_NUMBER_FORMAT_u, profile_length); + png_formatted_warning(png_ptr, p, + "Ignoring iCCP chunk with declared size = @1 and actual length = @2"); + return; + } + + png_set_iCCP(png_ptr, info_ptr, png_ptr->chunkdata, + compression_type, (png_bytep)png_ptr->chunkdata + prefix_length, + profile_size); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; +} +#endif /* PNG_READ_iCCP_SUPPORTED */ + +#ifdef PNG_READ_sPLT_SUPPORTED +void /* PRIVATE */ +png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +/* Note: this does not properly handle chunks that are > 64K under DOS */ +{ + png_bytep entry_start; + png_sPLT_t new_palette; + png_sPLT_entryp pp; + png_uint_32 data_length; + int entry_size, i; + png_uint_32 skip = 0; + png_size_t slength; + png_uint_32 dl; + png_size_t max_dl; + + png_debug(1, "in png_handle_sPLT"); + +#ifdef PNG_USER_LIMITS_SUPPORTED + + if (png_ptr->user_chunk_cache_max != 0) + { + if (png_ptr->user_chunk_cache_max == 1) + { + png_crc_finish(png_ptr, length); + return; + } + + if (--png_ptr->user_chunk_cache_max == 1) + { + png_warning(png_ptr, "No space in chunk cache for sPLT"); + png_crc_finish(png_ptr, length); + return; + } + } +#endif + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before sPLT"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid sPLT after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + +#ifdef PNG_MAX_MALLOC_64K + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "sPLT chunk too large to fit in memory"); + skip = length - (png_uint_32)65535L; + length = (png_uint_32)65535L; + } +#endif + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1); + + /* WARNING: this may break if size_t is less than 32 bits; it is assumed + * that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a + * potential breakage point if the types in pngconf.h aren't exactly right. + */ + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, skip)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_ptr->chunkdata[slength] = 0x00; + + for (entry_start = (png_bytep)png_ptr->chunkdata; *entry_start; + entry_start++) + /* Empty loop to find end of name */ ; + + ++entry_start; + + /* A sample depth should follow the separator, and we should be on it */ + if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "malformed sPLT chunk"); + return; + } + + new_palette.depth = *entry_start++; + entry_size = (new_palette.depth == 8 ? 6 : 10); + /* This must fit in a png_uint_32 because it is derived from the original + * chunk data length (and use 'length', not 'slength' here for clarity - + * they are guaranteed to be the same, see the tests above.) + */ + data_length = length - (png_uint_32)(entry_start - + (png_bytep)png_ptr->chunkdata); + + /* Integrity-check the data length */ + if (data_length % entry_size) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "sPLT chunk has bad length"); + return; + } + + dl = (png_int_32)(data_length / entry_size); + max_dl = PNG_SIZE_MAX / png_sizeof(png_sPLT_entry); + + if (dl > max_dl) + { + png_warning(png_ptr, "sPLT chunk too long"); + return; + } + + new_palette.nentries = (png_int_32)(data_length / entry_size); + + new_palette.entries = (png_sPLT_entryp)png_malloc_warn( + png_ptr, new_palette.nentries * png_sizeof(png_sPLT_entry)); + + if (new_palette.entries == NULL) + { + png_warning(png_ptr, "sPLT chunk requires too much memory"); + return; + } + +#ifdef PNG_POINTER_INDEXING_SUPPORTED + for (i = 0; i < new_palette.nentries; i++) + { + pp = new_palette.entries + i; + + if (new_palette.depth == 8) + { + pp->red = *entry_start++; + pp->green = *entry_start++; + pp->blue = *entry_start++; + pp->alpha = *entry_start++; + } + + else + { + pp->red = png_get_uint_16(entry_start); entry_start += 2; + pp->green = png_get_uint_16(entry_start); entry_start += 2; + pp->blue = png_get_uint_16(entry_start); entry_start += 2; + pp->alpha = png_get_uint_16(entry_start); entry_start += 2; + } + + pp->frequency = png_get_uint_16(entry_start); entry_start += 2; + } +#else + pp = new_palette.entries; + + for (i = 0; i < new_palette.nentries; i++) + { + + if (new_palette.depth == 8) + { + pp[i].red = *entry_start++; + pp[i].green = *entry_start++; + pp[i].blue = *entry_start++; + pp[i].alpha = *entry_start++; + } + + else + { + pp[i].red = png_get_uint_16(entry_start); entry_start += 2; + pp[i].green = png_get_uint_16(entry_start); entry_start += 2; + pp[i].blue = png_get_uint_16(entry_start); entry_start += 2; + pp[i].alpha = png_get_uint_16(entry_start); entry_start += 2; + } + + pp[i].frequency = png_get_uint_16(entry_start); entry_start += 2; + } +#endif + + /* Discard all chunk data except the name and stash that */ + new_palette.name = png_ptr->chunkdata; + + png_set_sPLT(png_ptr, info_ptr, &new_palette, 1); + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_free(png_ptr, new_palette.entries); +} +#endif /* PNG_READ_sPLT_SUPPORTED */ + +#ifdef PNG_READ_tRNS_SUPPORTED +void /* PRIVATE */ +png_handle_tRNS(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte readbuf[PNG_MAX_PALETTE_LENGTH]; + + png_debug(1, "in png_handle_tRNS"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before tRNS"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid tRNS after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tRNS)) + { + png_warning(png_ptr, "Duplicate tRNS chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) + { + png_byte buf[2]; + + if (length != 2) + { + png_warning(png_ptr, "Incorrect tRNS chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 2); + png_ptr->num_trans = 1; + png_ptr->trans_color.gray = png_get_uint_16(buf); + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) + { + png_byte buf[6]; + + if (length != 6) + { + png_warning(png_ptr, "Incorrect tRNS chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, (png_size_t)length); + png_ptr->num_trans = 1; + png_ptr->trans_color.red = png_get_uint_16(buf); + png_ptr->trans_color.green = png_get_uint_16(buf + 2); + png_ptr->trans_color.blue = png_get_uint_16(buf + 4); + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (!(png_ptr->mode & PNG_HAVE_PLTE)) + { + /* Should be an error, but we can cope with it. */ + png_warning(png_ptr, "Missing PLTE before tRNS"); + } + + if (length > (png_uint_32)png_ptr->num_palette || + length > PNG_MAX_PALETTE_LENGTH) + { + png_warning(png_ptr, "Incorrect tRNS chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + if (length == 0) + { + png_warning(png_ptr, "Zero length tRNS chunk"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, readbuf, (png_size_t)length); + png_ptr->num_trans = (png_uint_16)length; + } + + else + { + png_warning(png_ptr, "tRNS chunk not allowed with alpha channel"); + png_crc_finish(png_ptr, length); + return; + } + + if (png_crc_finish(png_ptr, 0)) + { + png_ptr->num_trans = 0; + return; + } + + png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans, + &(png_ptr->trans_color)); +} +#endif + +#ifdef PNG_READ_bKGD_SUPPORTED +void /* PRIVATE */ +png_handle_bKGD(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_size_t truelen; + png_byte buf[6]; + png_color_16 background; + + png_debug(1, "in png_handle_bKGD"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before bKGD"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid bKGD after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE && + !(png_ptr->mode & PNG_HAVE_PLTE)) + { + png_warning(png_ptr, "Missing PLTE before bKGD"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_bKGD)) + { + png_warning(png_ptr, "Duplicate bKGD chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + truelen = 1; + + else if (png_ptr->color_type & PNG_COLOR_MASK_COLOR) + truelen = 6; + + else + truelen = 2; + + if (length != truelen) + { + png_warning(png_ptr, "Incorrect bKGD chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, truelen); + + if (png_crc_finish(png_ptr, 0)) + return; + + /* We convert the index value into RGB components so that we can allow + * arbitrary RGB values for background when we have transparency, and + * so it is easy to determine the RGB values of the background color + * from the info_ptr struct. + */ + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + background.index = buf[0]; + + if (info_ptr && info_ptr->num_palette) + { + if (buf[0] >= info_ptr->num_palette) + { + png_warning(png_ptr, "Incorrect bKGD chunk index value"); + return; + } + + background.red = (png_uint_16)png_ptr->palette[buf[0]].red; + background.green = (png_uint_16)png_ptr->palette[buf[0]].green; + background.blue = (png_uint_16)png_ptr->palette[buf[0]].blue; + } + + else + background.red = background.green = background.blue = 0; + + background.gray = 0; + } + + else if (!(png_ptr->color_type & PNG_COLOR_MASK_COLOR)) /* GRAY */ + { + background.index = 0; + background.red = + background.green = + background.blue = + background.gray = png_get_uint_16(buf); + } + + else + { + background.index = 0; + background.red = png_get_uint_16(buf); + background.green = png_get_uint_16(buf + 2); + background.blue = png_get_uint_16(buf + 4); + background.gray = 0; + } + + png_set_bKGD(png_ptr, info_ptr, &background); +} +#endif + +#ifdef PNG_READ_hIST_SUPPORTED +void /* PRIVATE */ +png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + unsigned int num, i; + png_uint_16 readbuf[PNG_MAX_PALETTE_LENGTH]; + + png_debug(1, "in png_handle_hIST"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before hIST"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid hIST after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (!(png_ptr->mode & PNG_HAVE_PLTE)) + { + png_warning(png_ptr, "Missing PLTE before hIST"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_hIST)) + { + png_warning(png_ptr, "Duplicate hIST chunk"); + png_crc_finish(png_ptr, length); + return; + } + + num = length / 2 ; + + if (num != (unsigned int)png_ptr->num_palette || num > + (unsigned int)PNG_MAX_PALETTE_LENGTH) + { + png_warning(png_ptr, "Incorrect hIST chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + for (i = 0; i < num; i++) + { + png_byte buf[2]; + + png_crc_read(png_ptr, buf, 2); + readbuf[i] = png_get_uint_16(buf); + } + + if (png_crc_finish(png_ptr, 0)) + return; + + png_set_hIST(png_ptr, info_ptr, readbuf); +} +#endif + +#ifdef PNG_READ_pHYs_SUPPORTED +void /* PRIVATE */ +png_handle_pHYs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte buf[9]; + png_uint_32 res_x, res_y; + int unit_type; + + png_debug(1, "in png_handle_pHYs"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before pHYs"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid pHYs after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pHYs)) + { + png_warning(png_ptr, "Duplicate pHYs chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (length != 9) + { + png_warning(png_ptr, "Incorrect pHYs chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 9); + + if (png_crc_finish(png_ptr, 0)) + return; + + res_x = png_get_uint_32(buf); + res_y = png_get_uint_32(buf + 4); + unit_type = buf[8]; + png_set_pHYs(png_ptr, info_ptr, res_x, res_y, unit_type); +} +#endif + +#ifdef PNG_READ_oFFs_SUPPORTED +void /* PRIVATE */ +png_handle_oFFs(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte buf[9]; + png_int_32 offset_x, offset_y; + int unit_type; + + png_debug(1, "in png_handle_oFFs"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before oFFs"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid oFFs after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_oFFs)) + { + png_warning(png_ptr, "Duplicate oFFs chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (length != 9) + { + png_warning(png_ptr, "Incorrect oFFs chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 9); + + if (png_crc_finish(png_ptr, 0)) + return; + + offset_x = png_get_int_32(buf); + offset_y = png_get_int_32(buf + 4); + unit_type = buf[8]; + png_set_oFFs(png_ptr, info_ptr, offset_x, offset_y, unit_type); +} +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED +/* Read the pCAL chunk (described in the PNG Extensions document) */ +void /* PRIVATE */ +png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_int_32 X0, X1; + png_byte type, nparams; + png_charp buf, units, endptr; + png_charpp params; + png_size_t slength; + int i; + + png_debug(1, "in png_handle_pCAL"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before pCAL"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid pCAL after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_pCAL)) + { + png_warning(png_ptr, "Duplicate pCAL chunk"); + png_crc_finish(png_ptr, length); + return; + } + + png_debug1(2, "Allocating and reading pCAL chunk data (%u bytes)", + length + 1); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + + if (png_ptr->chunkdata == NULL) + { + png_warning(png_ptr, "No memory for pCAL purpose"); + return; + } + + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, 0)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + + png_debug(3, "Finding end of pCAL purpose string"); + for (buf = png_ptr->chunkdata; *buf; buf++) + /* Empty loop */ ; + + endptr = png_ptr->chunkdata + slength; + + /* We need to have at least 12 bytes after the purpose string + * in order to get the parameter information. + */ + if (endptr <= buf + 12) + { + png_warning(png_ptr, "Invalid pCAL data"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_debug(3, "Reading pCAL X0, X1, type, nparams, and units"); + X0 = png_get_int_32((png_bytep)buf+1); + X1 = png_get_int_32((png_bytep)buf+5); + type = buf[9]; + nparams = buf[10]; + units = buf + 11; + + png_debug(3, "Checking pCAL equation type and number of parameters"); + /* Check that we have the right number of parameters for known + * equation types. + */ + if ((type == PNG_EQUATION_LINEAR && nparams != 2) || + (type == PNG_EQUATION_BASE_E && nparams != 3) || + (type == PNG_EQUATION_ARBITRARY && nparams != 3) || + (type == PNG_EQUATION_HYPERBOLIC && nparams != 4)) + { + png_warning(png_ptr, "Invalid pCAL parameters for equation type"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + else if (type >= PNG_EQUATION_LAST) + { + png_warning(png_ptr, "Unrecognized equation type for pCAL chunk"); + } + + for (buf = units; *buf; buf++) + /* Empty loop to move past the units string. */ ; + + png_debug(3, "Allocating pCAL parameters array"); + + params = (png_charpp)png_malloc_warn(png_ptr, + (png_size_t)(nparams * png_sizeof(png_charp))); + + if (params == NULL) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_warning(png_ptr, "No memory for pCAL params"); + return; + } + + /* Get pointers to the start of each parameter string. */ + for (i = 0; i < (int)nparams; i++) + { + buf++; /* Skip the null string terminator from previous parameter. */ + + png_debug1(3, "Reading pCAL parameter %d", i); + + for (params[i] = buf; buf <= endptr && *buf != 0x00; buf++) + /* Empty loop to move past each parameter string */ ; + + /* Make sure we haven't run out of data yet */ + if (buf > endptr) + { + png_warning(png_ptr, "Invalid pCAL data"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_free(png_ptr, params); + return; + } + } + + png_set_pCAL(png_ptr, info_ptr, png_ptr->chunkdata, X0, X1, type, nparams, + units, params); + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_free(png_ptr, params); +} +#endif + +#ifdef PNG_READ_sCAL_SUPPORTED +/* Read the sCAL chunk */ +void /* PRIVATE */ +png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_size_t slength, i; + int state; + + png_debug(1, "in png_handle_sCAL"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before sCAL"); + + else if (png_ptr->mode & PNG_HAVE_IDAT) + { + png_warning(png_ptr, "Invalid sCAL after IDAT"); + png_crc_finish(png_ptr, length); + return; + } + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_sCAL)) + { + png_warning(png_ptr, "Duplicate sCAL chunk"); + png_crc_finish(png_ptr, length); + return; + } + + /* Need unit type, width, \0, height: minimum 4 bytes */ + else if (length < 4) + { + png_warning(png_ptr, "sCAL chunk too short"); + png_crc_finish(png_ptr, length); + return; + } + + png_debug1(2, "Allocating and reading sCAL chunk data (%u bytes)", + length + 1); + + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + + if (png_ptr->chunkdata == NULL) + { + png_warning(png_ptr, "Out of memory while processing sCAL chunk"); + png_crc_finish(png_ptr, length); + return; + } + + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */ + + if (png_crc_finish(png_ptr, 0)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + /* Validate the unit. */ + if (png_ptr->chunkdata[0] != 1 && png_ptr->chunkdata[0] != 2) + { + png_warning(png_ptr, "Invalid sCAL ignored: invalid unit"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + /* Validate the ASCII numbers, need two ASCII numbers separated by + * a '\0' and they need to fit exactly in the chunk data. + */ + i = 1; + state = 0; + + if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || + i >= slength || png_ptr->chunkdata[i++] != 0) + png_warning(png_ptr, "Invalid sCAL chunk ignored: bad width format"); + + else if (!PNG_FP_IS_POSITIVE(state)) + png_warning(png_ptr, "Invalid sCAL chunk ignored: non-positive width"); + + else + { + png_size_t heighti = i; + + state = 0; + if (!png_check_fp_number(png_ptr->chunkdata, slength, &state, &i) || + i != slength) + png_warning(png_ptr, "Invalid sCAL chunk ignored: bad height format"); + + else if (!PNG_FP_IS_POSITIVE(state)) + png_warning(png_ptr, + "Invalid sCAL chunk ignored: non-positive height"); + + else + /* This is the (only) success case. */ + png_set_sCAL_s(png_ptr, info_ptr, png_ptr->chunkdata[0], + png_ptr->chunkdata+1, png_ptr->chunkdata+heighti); + } + + /* Clean up - just free the temporarily allocated buffer. */ + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; +} +#endif + +#ifdef PNG_READ_tIME_SUPPORTED +void /* PRIVATE */ +png_handle_tIME(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_byte buf[7]; + png_time mod_time; + + png_debug(1, "in png_handle_tIME"); + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Out of place tIME chunk"); + + else if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_tIME)) + { + png_warning(png_ptr, "Duplicate tIME chunk"); + png_crc_finish(png_ptr, length); + return; + } + + if (png_ptr->mode & PNG_HAVE_IDAT) + png_ptr->mode |= PNG_AFTER_IDAT; + + if (length != 7) + { + png_warning(png_ptr, "Incorrect tIME chunk length"); + png_crc_finish(png_ptr, length); + return; + } + + png_crc_read(png_ptr, buf, 7); + + if (png_crc_finish(png_ptr, 0)) + return; + + mod_time.second = buf[6]; + mod_time.minute = buf[5]; + mod_time.hour = buf[4]; + mod_time.day = buf[3]; + mod_time.month = buf[2]; + mod_time.year = png_get_uint_16(buf); + + png_set_tIME(png_ptr, info_ptr, &mod_time); +} +#endif + +#ifdef PNG_READ_tEXt_SUPPORTED +/* Note: this does not properly handle chunks that are > 64K under DOS */ +void /* PRIVATE */ +png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_textp text_ptr; + png_charp key; + png_charp text; + png_uint_32 skip = 0; + png_size_t slength; + int ret; + + png_debug(1, "in png_handle_tEXt"); + +#ifdef PNG_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_cache_max != 0) + { + if (png_ptr->user_chunk_cache_max == 1) + { + png_crc_finish(png_ptr, length); + return; + } + + if (--png_ptr->user_chunk_cache_max == 1) + { + png_warning(png_ptr, "No space in chunk cache for tEXt"); + png_crc_finish(png_ptr, length); + return; + } + } +#endif + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before tEXt"); + + if (png_ptr->mode & PNG_HAVE_IDAT) + png_ptr->mode |= PNG_AFTER_IDAT; + +#ifdef PNG_MAX_MALLOC_64K + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "tEXt chunk too large to fit in memory"); + skip = length - (png_uint_32)65535L; + length = (png_uint_32)65535L; + } +#endif + + png_free(png_ptr, png_ptr->chunkdata); + + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + + if (png_ptr->chunkdata == NULL) + { + png_warning(png_ptr, "No memory to process text chunk"); + return; + } + + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, skip)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + key = png_ptr->chunkdata; + + key[slength] = 0x00; + + for (text = key; *text; text++) + /* Empty loop to find end of key */ ; + + if (text != key + slength) + text++; + + text_ptr = (png_textp)png_malloc_warn(png_ptr, + png_sizeof(png_text)); + + if (text_ptr == NULL) + { + png_warning(png_ptr, "Not enough memory to process text chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + text_ptr->compression = PNG_TEXT_COMPRESSION_NONE; + text_ptr->key = key; + text_ptr->lang = NULL; + text_ptr->lang_key = NULL; + text_ptr->itxt_length = 0; + text_ptr->text = text; + text_ptr->text_length = png_strlen(text); + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + png_free(png_ptr, text_ptr); + + if (ret) + png_warning(png_ptr, "Insufficient memory to process text chunk"); +} +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED +/* Note: this does not correctly handle chunks that are > 64K under DOS */ +void /* PRIVATE */ +png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_textp text_ptr; + png_charp text; + int comp_type; + int ret; + png_size_t slength, prefix_len, data_len; + + png_debug(1, "in png_handle_zTXt"); + +#ifdef PNG_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_cache_max != 0) + { + if (png_ptr->user_chunk_cache_max == 1) + { + png_crc_finish(png_ptr, length); + return; + } + + if (--png_ptr->user_chunk_cache_max == 1) + { + png_warning(png_ptr, "No space in chunk cache for zTXt"); + png_crc_finish(png_ptr, length); + return; + } + } +#endif + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before zTXt"); + + if (png_ptr->mode & PNG_HAVE_IDAT) + png_ptr->mode |= PNG_AFTER_IDAT; + +#ifdef PNG_MAX_MALLOC_64K + /* We will no doubt have problems with chunks even half this size, but + * there is no hard and fast rule to tell us where to stop. + */ + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "zTXt chunk too large to fit in memory"); + png_crc_finish(png_ptr, length); + return; + } +#endif + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + + if (png_ptr->chunkdata == NULL) + { + png_warning(png_ptr, "Out of memory processing zTXt chunk"); + return; + } + + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, 0)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_ptr->chunkdata[slength] = 0x00; + + for (text = png_ptr->chunkdata; *text; text++) + /* Empty loop */ ; + + /* zTXt must have some text after the chunkdataword */ + if (text >= png_ptr->chunkdata + slength - 2) + { + png_warning(png_ptr, "Truncated zTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + else + { + comp_type = *(++text); + + if (comp_type != PNG_TEXT_COMPRESSION_zTXt) + { + png_warning(png_ptr, "Unknown compression type in zTXt chunk"); + comp_type = PNG_TEXT_COMPRESSION_zTXt; + } + + text++; /* Skip the compression_method byte */ + } + + prefix_len = text - png_ptr->chunkdata; + + png_decompress_chunk(png_ptr, comp_type, + (png_size_t)length, prefix_len, &data_len); + + text_ptr = (png_textp)png_malloc_warn(png_ptr, + png_sizeof(png_text)); + + if (text_ptr == NULL) + { + png_warning(png_ptr, "Not enough memory to process zTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + text_ptr->compression = comp_type; + text_ptr->key = png_ptr->chunkdata; + text_ptr->lang = NULL; + text_ptr->lang_key = NULL; + text_ptr->itxt_length = 0; + text_ptr->text = png_ptr->chunkdata + prefix_len; + text_ptr->text_length = data_len; + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_free(png_ptr, text_ptr); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + + if (ret) + png_error(png_ptr, "Insufficient memory to store zTXt chunk"); +} +#endif + +#ifdef PNG_READ_iTXt_SUPPORTED +/* Note: this does not correctly handle chunks that are > 64K under DOS */ +void /* PRIVATE */ +png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_textp text_ptr; + png_charp key, lang, text, lang_key; + int comp_flag; + int comp_type = 0; + int ret; + png_size_t slength, prefix_len, data_len; + + png_debug(1, "in png_handle_iTXt"); + +#ifdef PNG_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_cache_max != 0) + { + if (png_ptr->user_chunk_cache_max == 1) + { + png_crc_finish(png_ptr, length); + return; + } + + if (--png_ptr->user_chunk_cache_max == 1) + { + png_warning(png_ptr, "No space in chunk cache for iTXt"); + png_crc_finish(png_ptr, length); + return; + } + } +#endif + + if (!(png_ptr->mode & PNG_HAVE_IHDR)) + png_error(png_ptr, "Missing IHDR before iTXt"); + + if (png_ptr->mode & PNG_HAVE_IDAT) + png_ptr->mode |= PNG_AFTER_IDAT; + +#ifdef PNG_MAX_MALLOC_64K + /* We will no doubt have problems with chunks even half this size, but + * there is no hard and fast rule to tell us where to stop. + */ + if (length > (png_uint_32)65535L) + { + png_warning(png_ptr, "iTXt chunk too large to fit in memory"); + png_crc_finish(png_ptr, length); + return; + } +#endif + + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = (png_charp)png_malloc_warn(png_ptr, length + 1); + + if (png_ptr->chunkdata == NULL) + { + png_warning(png_ptr, "No memory to process iTXt chunk"); + return; + } + + slength = (png_size_t)length; + png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength); + + if (png_crc_finish(png_ptr, 0)) + { + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + png_ptr->chunkdata[slength] = 0x00; + + for (lang = png_ptr->chunkdata; *lang; lang++) + /* Empty loop */ ; + + lang++; /* Skip NUL separator */ + + /* iTXt must have a language tag (possibly empty), two compression bytes, + * translated keyword (possibly empty), and possibly some text after the + * keyword + */ + + if (lang >= png_ptr->chunkdata + slength - 3) + { + png_warning(png_ptr, "Truncated iTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + else + { + comp_flag = *lang++; + comp_type = *lang++; + } + + if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt)) + { + png_warning(png_ptr, "Unknown iTXt compression type or method"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + for (lang_key = lang; *lang_key; lang_key++) + /* Empty loop */ ; + + lang_key++; /* Skip NUL separator */ + + if (lang_key >= png_ptr->chunkdata + slength) + { + png_warning(png_ptr, "Truncated iTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + for (text = lang_key; *text; text++) + /* Empty loop */ ; + + text++; /* Skip NUL separator */ + + if (text >= png_ptr->chunkdata + slength) + { + png_warning(png_ptr, "Malformed iTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + prefix_len = text - png_ptr->chunkdata; + + key=png_ptr->chunkdata; + + if (comp_flag) + png_decompress_chunk(png_ptr, comp_type, + (size_t)length, prefix_len, &data_len); + + else + data_len = png_strlen(png_ptr->chunkdata + prefix_len); + + text_ptr = (png_textp)png_malloc_warn(png_ptr, + png_sizeof(png_text)); + + if (text_ptr == NULL) + { + png_warning(png_ptr, "Not enough memory to process iTXt chunk"); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + return; + } + + text_ptr->compression = (int)comp_flag + 1; + text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key); + text_ptr->lang = png_ptr->chunkdata + (lang - key); + text_ptr->itxt_length = data_len; + text_ptr->text_length = 0; + text_ptr->key = png_ptr->chunkdata; + text_ptr->text = png_ptr->chunkdata + prefix_len; + + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1); + + png_free(png_ptr, text_ptr); + png_free(png_ptr, png_ptr->chunkdata); + png_ptr->chunkdata = NULL; + + if (ret) + png_error(png_ptr, "Insufficient memory to store iTXt chunk"); +} +#endif + +/* This function is called when we haven't found a handler for a + * chunk. If there isn't a problem with the chunk itself (ie bad + * chunk name, CRC, or a critical chunk), the chunk is silently ignored + * -- unless the PNG_FLAG_UNKNOWN_CHUNKS_SUPPORTED flag is on in which + * case it will be saved away to be written out later. + */ +void /* PRIVATE */ +png_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) +{ + png_uint_32 skip = 0; + + png_debug(1, "in png_handle_unknown"); + +#ifdef PNG_USER_LIMITS_SUPPORTED + if (png_ptr->user_chunk_cache_max != 0) + { + if (png_ptr->user_chunk_cache_max == 1) + { + png_crc_finish(png_ptr, length); + return; + } + + if (--png_ptr->user_chunk_cache_max == 1) + { + png_warning(png_ptr, "No space in chunk cache for unknown chunk"); + png_crc_finish(png_ptr, length); + return; + } + } +#endif + + if (png_ptr->mode & PNG_HAVE_IDAT) + { + if (png_ptr->chunk_name != png_IDAT) + png_ptr->mode |= PNG_AFTER_IDAT; + } + + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + { +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED + && png_ptr->read_user_chunk_fn == NULL +#endif + ) +#endif + png_chunk_error(png_ptr, "unknown critical chunk"); + } + +#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + if ((png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS) +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED + || (png_ptr->read_user_chunk_fn != NULL) +#endif + ) + { +#ifdef PNG_MAX_MALLOC_64K + if (length > 65535) + { + png_warning(png_ptr, "unknown chunk too large to fit in memory"); + skip = length - 65535; + length = 65535; + } +#endif + + /* TODO: this code is very close to the unknown handling in pngpread.c, + * maybe it can be put into a common utility routine? + * png_struct::unknown_chunk is just used as a temporary variable, along + * with the data into which the chunk is read. These can be eliminated. + */ + PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name); + png_ptr->unknown_chunk.size = (png_size_t)length; + + if (length == 0) + png_ptr->unknown_chunk.data = NULL; + + else + { + png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr, length); + png_crc_read(png_ptr, png_ptr->unknown_chunk.data, length); + } + +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED + if (png_ptr->read_user_chunk_fn != NULL) + { + /* Callback to user unknown chunk handler */ + int ret; + + ret = (*(png_ptr->read_user_chunk_fn)) + (png_ptr, &png_ptr->unknown_chunk); + + if (ret < 0) + png_chunk_error(png_ptr, "error in user chunk"); + + if (ret == 0) + { + if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name)) + { +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + if (png_chunk_unknown_handling(png_ptr, png_ptr->chunk_name) != + PNG_HANDLE_CHUNK_ALWAYS) +#endif + png_chunk_error(png_ptr, "unknown critical chunk"); + } + + png_set_unknown_chunks(png_ptr, info_ptr, + &png_ptr->unknown_chunk, 1); + } + } + + else +#endif + png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1); + + png_free(png_ptr, png_ptr->unknown_chunk.data); + png_ptr->unknown_chunk.data = NULL; + } + + else +#endif + skip = length; + + png_crc_finish(png_ptr, skip); + +#ifndef PNG_READ_USER_CHUNKS_SUPPORTED + PNG_UNUSED(info_ptr) /* Quiet compiler warnings about unused info_ptr */ +#endif +} + +/* This function is called to verify that a chunk name is valid. + * This function can't have the "critical chunk check" incorporated + * into it, since in the future we will need to be able to call user + * functions to handle unknown critical chunks after we check that + * the chunk name itself is valid. + */ + +/* Bit hacking: the test for an invalid byte in the 4 byte chunk name is: + * + * ((c) < 65 || (c) > 122 || ((c) > 90 && (c) < 97)) + */ + +void /* PRIVATE */ +png_check_chunk_name(png_structp png_ptr, png_uint_32 chunk_name) +{ + int i; + + png_debug(1, "in png_check_chunk_name"); + + for (i=1; i<=4; ++i) + { + int c = chunk_name & 0xff; + + if (c < 65 || c > 122 || (c > 90 && c < 97)) + png_chunk_error(png_ptr, "invalid chunk type"); + + chunk_name >>= 8; + } +} + +/* Combines the row recently read in with the existing pixels in the row. This + * routine takes care of alpha and transparency if requested. This routine also + * handles the two methods of progressive display of interlaced images, + * depending on the 'display' value; if 'display' is true then the whole row + * (dp) is filled from the start by replicating the available pixels. If + * 'display' is false only those pixels present in the pass are filled in. + */ +void /* PRIVATE */ +png_combine_row(png_structp png_ptr, png_bytep dp, int display) +{ + unsigned int pixel_depth = png_ptr->transformed_pixel_depth; + png_const_bytep sp = png_ptr->row_buf + 1; + png_uint_32 row_width = png_ptr->width; + unsigned int pass = png_ptr->pass; + png_bytep end_ptr = 0; + png_byte end_byte = 0; + unsigned int end_mask; + + png_debug(1, "in png_combine_row"); + + /* Added in 1.5.6: it should not be possible to enter this routine until at + * least one row has been read from the PNG data and transformed. + */ + if (pixel_depth == 0) + png_error(png_ptr, "internal row logic error"); + + /* Added in 1.5.4: the pixel depth should match the information returned by + * any call to png_read_update_info at this point. Do not continue if we got + * this wrong. + */ + if (png_ptr->info_rowbytes != 0 && png_ptr->info_rowbytes != + PNG_ROWBYTES(pixel_depth, row_width)) + png_error(png_ptr, "internal row size calculation error"); + + /* Don't expect this to ever happen: */ + if (row_width == 0) + png_error(png_ptr, "internal row width error"); + + /* Preserve the last byte in cases where only part of it will be overwritten, + * the multiply below may overflow, we don't care because ANSI-C guarantees + * we get the low bits. + */ + end_mask = (pixel_depth * row_width) & 7; + if (end_mask != 0) + { + /* end_ptr == NULL is a flag to say do nothing */ + end_ptr = dp + PNG_ROWBYTES(pixel_depth, row_width) - 1; + end_byte = *end_ptr; +# ifdef PNG_READ_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) /* little-endian byte */ + end_mask = 0xff << end_mask; + + else /* big-endian byte */ +# endif + end_mask = 0xff >> end_mask; + /* end_mask is now the bits to *keep* from the destination row */ + } + + /* For non-interlaced images this reduces to a png_memcpy(). A png_memcpy() + * will also happen if interlacing isn't supported or if the application + * does not call png_set_interlace_handling(). In the latter cases the + * caller just gets a sequence of the unexpanded rows from each interlace + * pass. + */ +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE) && + pass < 6 && (display == 0 || + /* The following copies everything for 'display' on passes 0, 2 and 4. */ + (display == 1 && (pass & 1) != 0))) + { + /* Narrow images may have no bits in a pass; the caller should handle + * this, but this test is cheap: + */ + if (row_width <= PNG_PASS_START_COL(pass)) + return; + + if (pixel_depth < 8) + { + /* For pixel depths up to 4 bpp the 8-pixel mask can be expanded to fit + * into 32 bits, then a single loop over the bytes using the four byte + * values in the 32-bit mask can be used. For the 'display' option the + * expanded mask may also not require any masking within a byte. To + * make this work the PACKSWAP option must be taken into account - it + * simply requires the pixels to be reversed in each byte. + * + * The 'regular' case requires a mask for each of the first 6 passes, + * the 'display' case does a copy for the even passes in the range + * 0..6. This has already been handled in the test above. + * + * The masks are arranged as four bytes with the first byte to use in + * the lowest bits (little-endian) regardless of the order (PACKSWAP or + * not) of the pixels in each byte. + * + * NOTE: the whole of this logic depends on the caller of this function + * only calling it on rows appropriate to the pass. This function only + * understands the 'x' logic; the 'y' logic is handled by the caller. + * + * The following defines allow generation of compile time constant bit + * masks for each pixel depth and each possibility of swapped or not + * swapped bytes. Pass 'p' is in the range 0..6; 'x', a pixel index, + * is in the range 0..7; and the result is 1 if the pixel is to be + * copied in the pass, 0 if not. 'S' is for the sparkle method, 'B' + * for the block method. + * + * With some compilers a compile time expression of the general form: + * + * (shift >= 32) ? (a >> (shift-32)) : (b >> shift) + * + * Produces warnings with values of 'shift' in the range 33 to 63 + * because the right hand side of the ?: expression is evaluated by + * the compiler even though it isn't used. Microsoft Visual C (various + * versions) and the Intel C compiler are known to do this. To avoid + * this the following macros are used in 1.5.6. This is a temporary + * solution to avoid destabilizing the code during the release process. + */ +# if PNG_USE_COMPILE_TIME_MASKS +# define PNG_LSR(x,s) ((x)>>((s) & 0x1f)) +# define PNG_LSL(x,s) ((x)<<((s) & 0x1f)) +# else +# define PNG_LSR(x,s) ((x)>>(s)) +# define PNG_LSL(x,s) ((x)<<(s)) +# endif +# define S_COPY(p,x) (((p)<4 ? PNG_LSR(0x80088822,(3-(p))*8+(7-(x))) :\ + PNG_LSR(0xaa55ff00,(7-(p))*8+(7-(x)))) & 1) +# define B_COPY(p,x) (((p)<4 ? PNG_LSR(0xff0fff33,(3-(p))*8+(7-(x))) :\ + PNG_LSR(0xff55ff00,(7-(p))*8+(7-(x)))) & 1) + + /* Return a mask for pass 'p' pixel 'x' at depth 'd'. The mask is + * little endian - the first pixel is at bit 0 - however the extra + * parameter 's' can be set to cause the mask position to be swapped + * within each byte, to match the PNG format. This is done by XOR of + * the shift with 7, 6 or 4 for bit depths 1, 2 and 4. + */ +# define PIXEL_MASK(p,x,d,s) \ + (PNG_LSL(((PNG_LSL(1U,(d)))-1),(((x)*(d))^((s)?8-(d):0)))) + + /* Hence generate the appropriate 'block' or 'sparkle' pixel copy mask. + */ +# define S_MASKx(p,x,d,s) (S_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) +# define B_MASKx(p,x,d,s) (B_COPY(p,x)?PIXEL_MASK(p,x,d,s):0) + + /* Combine 8 of these to get the full mask. For the 1-bpp and 2-bpp + * cases the result needs replicating, for the 4-bpp case the above + * generates a full 32 bits. + */ +# define MASK_EXPAND(m,d) ((m)*((d)==1?0x01010101:((d)==2?0x00010001:1))) + +# define S_MASK(p,d,s) MASK_EXPAND(S_MASKx(p,0,d,s) + S_MASKx(p,1,d,s) +\ + S_MASKx(p,2,d,s) + S_MASKx(p,3,d,s) + S_MASKx(p,4,d,s) +\ + S_MASKx(p,5,d,s) + S_MASKx(p,6,d,s) + S_MASKx(p,7,d,s), d) + +# define B_MASK(p,d,s) MASK_EXPAND(B_MASKx(p,0,d,s) + B_MASKx(p,1,d,s) +\ + B_MASKx(p,2,d,s) + B_MASKx(p,3,d,s) + B_MASKx(p,4,d,s) +\ + B_MASKx(p,5,d,s) + B_MASKx(p,6,d,s) + B_MASKx(p,7,d,s), d) + +#if PNG_USE_COMPILE_TIME_MASKS + /* Utility macros to construct all the masks for a depth/swap + * combination. The 's' parameter says whether the format is PNG + * (big endian bytes) or not. Only the three odd-numbered passes are + * required for the display/block algorithm. + */ +# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\ + S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) } + +# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) } + +# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2)) + + /* Hence the pre-compiled masks indexed by PACKSWAP (or not), depth and + * then pass: + */ + static PNG_CONST png_uint_32 row_mask[2/*PACKSWAP*/][3/*depth*/][6] = + { + /* Little-endian byte masks for PACKSWAP */ + { S_MASKS(1,0), S_MASKS(2,0), S_MASKS(4,0) }, + /* Normal (big-endian byte) masks - PNG format */ + { S_MASKS(1,1), S_MASKS(2,1), S_MASKS(4,1) } + }; + + /* display_mask has only three entries for the odd passes, so index by + * pass>>1. + */ + static PNG_CONST png_uint_32 display_mask[2][3][3] = + { + /* Little-endian byte masks for PACKSWAP */ + { B_MASKS(1,0), B_MASKS(2,0), B_MASKS(4,0) }, + /* Normal (big-endian byte) masks - PNG format */ + { B_MASKS(1,1), B_MASKS(2,1), B_MASKS(4,1) } + }; + +# define MASK(pass,depth,display,png)\ + ((display)?display_mask[png][DEPTH_INDEX(depth)][pass>>1]:\ + row_mask[png][DEPTH_INDEX(depth)][pass]) + +#else /* !PNG_USE_COMPILE_TIME_MASKS */ + /* This is the runtime alternative: it seems unlikely that this will + * ever be either smaller or faster than the compile time approach. + */ +# define MASK(pass,depth,display,png)\ + ((display)?B_MASK(pass,depth,png):S_MASK(pass,depth,png)) +#endif /* !PNG_USE_COMPILE_TIME_MASKS */ + + /* Use the appropriate mask to copy the required bits. In some cases + * the byte mask will be 0 or 0xff, optimize these cases. row_width is + * the number of pixels, but the code copies bytes, so it is necessary + * to special case the end. + */ + png_uint_32 pixels_per_byte = 8 / pixel_depth; + png_uint_32 mask; + +# ifdef PNG_READ_PACKSWAP_SUPPORTED + if (png_ptr->transformations & PNG_PACKSWAP) + mask = MASK(pass, pixel_depth, display, 0); + + else +# endif + mask = MASK(pass, pixel_depth, display, 1); + + for (;;) + { + png_uint_32 m; + + /* It doesn't matter in the following if png_uint_32 has more than + * 32 bits because the high bits always match those in m<<24; it is, + * however, essential to use OR here, not +, because of this. + */ + m = mask; + mask = (m >> 8) | (m << 24); /* rotate right to good compilers */ + m &= 0xff; + + if (m != 0) /* something to copy */ + { + if (m != 0xff) + *dp = (png_byte)((*dp & ~m) | (*sp & m)); + else + *dp = *sp; + } + + /* NOTE: this may overwrite the last byte with garbage if the image + * is not an exact number of bytes wide; libpng has always done + * this. + */ + if (row_width <= pixels_per_byte) + break; /* May need to restore part of the last byte */ + + row_width -= pixels_per_byte; + ++dp; + ++sp; + } + } + + else /* pixel_depth >= 8 */ + { + unsigned int bytes_to_copy, bytes_to_jump; + + /* Validate the depth - it must be a multiple of 8 */ + if (pixel_depth & 7) + png_error(png_ptr, "invalid user transform pixel depth"); + + pixel_depth >>= 3; /* now in bytes */ + row_width *= pixel_depth; + + /* Regardless of pass number the Adam 7 interlace always results in a + * fixed number of pixels to copy then to skip. There may be a + * different number of pixels to skip at the start though. + */ + { + unsigned int offset = PNG_PASS_START_COL(pass) * pixel_depth; + + row_width -= offset; + dp += offset; + sp += offset; + } + + /* Work out the bytes to copy. */ + if (display) + { + /* When doing the 'block' algorithm the pixel in the pass gets + * replicated to adjacent pixels. This is why the even (0,2,4,6) + * passes are skipped above - the entire expanded row is copied. + */ + bytes_to_copy = (1<<((6-pass)>>1)) * pixel_depth; + + /* But don't allow this number to exceed the actual row width. */ + if (bytes_to_copy > row_width) + bytes_to_copy = row_width; + } + + else /* normal row; Adam7 only ever gives us one pixel to copy. */ + bytes_to_copy = pixel_depth; + + /* In Adam7 there is a constant offset between where the pixels go. */ + bytes_to_jump = PNG_PASS_COL_OFFSET(pass) * pixel_depth; + + /* And simply copy these bytes. Some optimization is possible here, + * depending on the value of 'bytes_to_copy'. Special case the low + * byte counts, which we know to be frequent. + * + * Notice that these cases all 'return' rather than 'break' - this + * avoids an unnecessary test on whether to restore the last byte + * below. + */ + switch (bytes_to_copy) + { + case 1: + for (;;) + { + *dp = *sp; + + if (row_width <= bytes_to_jump) + return; + + dp += bytes_to_jump; + sp += bytes_to_jump; + row_width -= bytes_to_jump; + } + + case 2: + /* There is a possibility of a partial copy at the end here; this + * slows the code down somewhat. + */ + do + { + dp[0] = sp[0], dp[1] = sp[1]; + + if (row_width <= bytes_to_jump) + return; + + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; + } + while (row_width > 1); + + /* And there can only be one byte left at this point: */ + *dp = *sp; + return; + + case 3: + /* This can only be the RGB case, so each copy is exactly one + * pixel and it is not necessary to check for a partial copy. + */ + for(;;) + { + dp[0] = sp[0], dp[1] = sp[1], dp[2] = sp[2]; + + if (row_width <= bytes_to_jump) + return; + + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; + } + + default: +#if PNG_ALIGN_TYPE != PNG_ALIGN_NONE + /* Check for double byte alignment and, if possible, use a + * 16-bit copy. Don't attempt this for narrow images - ones that + * are less than an interlace panel wide. Don't attempt it for + * wide bytes_to_copy either - use the png_memcpy there. + */ + if (bytes_to_copy < 16 /*else use png_memcpy*/ && + png_isaligned(dp, png_uint_16) && + png_isaligned(sp, png_uint_16) && + bytes_to_copy % sizeof (png_uint_16) == 0 && + bytes_to_jump % sizeof (png_uint_16) == 0) + { + /* Everything is aligned for png_uint_16 copies, but try for + * png_uint_32 first. + */ + if (png_isaligned(dp, png_uint_32) && + png_isaligned(sp, png_uint_32) && + bytes_to_copy % sizeof (png_uint_32) == 0 && + bytes_to_jump % sizeof (png_uint_32) == 0) + { + png_uint_32p dp32 = (png_uint_32p)dp; + png_const_uint_32p sp32 = (png_const_uint_32p)sp; + unsigned int skip = (bytes_to_jump-bytes_to_copy) / + sizeof (png_uint_32); + + do + { + size_t c = bytes_to_copy; + do + { + *dp32++ = *sp32++; + c -= sizeof (png_uint_32); + } + while (c > 0); + + if (row_width <= bytes_to_jump) + return; + + dp32 += skip; + sp32 += skip; + row_width -= bytes_to_jump; + } + while (bytes_to_copy <= row_width); + + /* Get to here when the row_width truncates the final copy. + * There will be 1-3 bytes left to copy, so don't try the + * 16-bit loop below. + */ + dp = (png_bytep)dp32; + sp = (png_const_bytep)sp32; + do + *dp++ = *sp++; + while (--row_width > 0); + return; + } + + /* Else do it in 16-bit quantities, but only if the size is + * not too large. + */ + else + { + png_uint_16p dp16 = (png_uint_16p)dp; + png_const_uint_16p sp16 = (png_const_uint_16p)sp; + unsigned int skip = (bytes_to_jump-bytes_to_copy) / + sizeof (png_uint_16); + + do + { + size_t c = bytes_to_copy; + do + { + *dp16++ = *sp16++; + c -= sizeof (png_uint_16); + } + while (c > 0); + + if (row_width <= bytes_to_jump) + return; + + dp16 += skip; + sp16 += skip; + row_width -= bytes_to_jump; + } + while (bytes_to_copy <= row_width); + + /* End of row - 1 byte left, bytes_to_copy > row_width: */ + dp = (png_bytep)dp16; + sp = (png_const_bytep)sp16; + do + *dp++ = *sp++; + while (--row_width > 0); + return; + } + } +#endif /* PNG_ALIGN_ code */ + + /* The true default - use a png_memcpy: */ + for (;;) + { + png_memcpy(dp, sp, bytes_to_copy); + + if (row_width <= bytes_to_jump) + return; + + sp += bytes_to_jump; + dp += bytes_to_jump; + row_width -= bytes_to_jump; + if (bytes_to_copy > row_width) + bytes_to_copy = row_width; + } + } + + /* NOT REACHED*/ + } /* pixel_depth >= 8 */ + + /* Here if pixel_depth < 8 to check 'end_ptr' below. */ + } + else +#endif + + /* If here then the switch above wasn't used so just png_memcpy the whole row + * from the temporary row buffer (notice that this overwrites the end of the + * destination row if it is a partial byte.) + */ + png_memcpy(dp, sp, PNG_ROWBYTES(pixel_depth, row_width)); + + /* Restore the overwritten bits from the last byte if necessary. */ + if (end_ptr != NULL) + *end_ptr = (png_byte)((end_byte & end_mask) | (*end_ptr & ~end_mask)); +} + +#ifdef PNG_READ_INTERLACING_SUPPORTED +void /* PRIVATE */ +png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass, + png_uint_32 transformations /* Because these may affect the byte layout */) +{ + /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ + /* Offset to next interlace block */ + static PNG_CONST int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + + png_debug(1, "in png_do_read_interlace"); + if (row != NULL && row_info != NULL) + { + png_uint_32 final_width; + + final_width = row_info->width * png_pass_inc[pass]; + + switch (row_info->pixel_depth) + { + case 1: + { + png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 3); + png_bytep dp = row + (png_size_t)((final_width - 1) >> 3); + int sshift, dshift; + int s_start, s_end, s_inc; + int jstop = png_pass_inc[pass]; + png_byte v; + png_uint_32 i; + int j; + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (transformations & PNG_PACKSWAP) + { + sshift = (int)((row_info->width + 7) & 0x07); + dshift = (int)((final_width + 7) & 0x07); + s_start = 7; + s_end = 0; + s_inc = -1; + } + + else +#endif + { + sshift = 7 - (int)((row_info->width + 7) & 0x07); + dshift = 7 - (int)((final_width + 7) & 0x07); + s_start = 0; + s_end = 7; + s_inc = 1; + } + + for (i = 0; i < row_info->width; i++) + { + v = (png_byte)((*sp >> sshift) & 0x01); + for (j = 0; j < jstop; j++) + { + *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); + *dp |= (png_byte)(v << dshift); + + if (dshift == s_end) + { + dshift = s_start; + dp--; + } + + else + dshift += s_inc; + } + + if (sshift == s_end) + { + sshift = s_start; + sp--; + } + + else + sshift += s_inc; + } + break; + } + + case 2: + { + png_bytep sp = row + (png_uint_32)((row_info->width - 1) >> 2); + png_bytep dp = row + (png_uint_32)((final_width - 1) >> 2); + int sshift, dshift; + int s_start, s_end, s_inc; + int jstop = png_pass_inc[pass]; + png_uint_32 i; + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (transformations & PNG_PACKSWAP) + { + sshift = (int)(((row_info->width + 3) & 0x03) << 1); + dshift = (int)(((final_width + 3) & 0x03) << 1); + s_start = 6; + s_end = 0; + s_inc = -2; + } + + else +#endif + { + sshift = (int)((3 - ((row_info->width + 3) & 0x03)) << 1); + dshift = (int)((3 - ((final_width + 3) & 0x03)) << 1); + s_start = 0; + s_end = 6; + s_inc = 2; + } + + for (i = 0; i < row_info->width; i++) + { + png_byte v; + int j; + + v = (png_byte)((*sp >> sshift) & 0x03); + for (j = 0; j < jstop; j++) + { + *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); + *dp |= (png_byte)(v << dshift); + + if (dshift == s_end) + { + dshift = s_start; + dp--; + } + + else + dshift += s_inc; + } + + if (sshift == s_end) + { + sshift = s_start; + sp--; + } + + else + sshift += s_inc; + } + break; + } + + case 4: + { + png_bytep sp = row + (png_size_t)((row_info->width - 1) >> 1); + png_bytep dp = row + (png_size_t)((final_width - 1) >> 1); + int sshift, dshift; + int s_start, s_end, s_inc; + png_uint_32 i; + int jstop = png_pass_inc[pass]; + +#ifdef PNG_READ_PACKSWAP_SUPPORTED + if (transformations & PNG_PACKSWAP) + { + sshift = (int)(((row_info->width + 1) & 0x01) << 2); + dshift = (int)(((final_width + 1) & 0x01) << 2); + s_start = 4; + s_end = 0; + s_inc = -4; + } + + else +#endif + { + sshift = (int)((1 - ((row_info->width + 1) & 0x01)) << 2); + dshift = (int)((1 - ((final_width + 1) & 0x01)) << 2); + s_start = 0; + s_end = 4; + s_inc = 4; + } + + for (i = 0; i < row_info->width; i++) + { + png_byte v = (png_byte)((*sp >> sshift) & 0x0f); + int j; + + for (j = 0; j < jstop; j++) + { + *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); + *dp |= (png_byte)(v << dshift); + + if (dshift == s_end) + { + dshift = s_start; + dp--; + } + + else + dshift += s_inc; + } + + if (sshift == s_end) + { + sshift = s_start; + sp--; + } + + else + sshift += s_inc; + } + break; + } + + default: + { + png_size_t pixel_bytes = (row_info->pixel_depth >> 3); + + png_bytep sp = row + (png_size_t)(row_info->width - 1) + * pixel_bytes; + + png_bytep dp = row + (png_size_t)(final_width - 1) * pixel_bytes; + + int jstop = png_pass_inc[pass]; + png_uint_32 i; + + for (i = 0; i < row_info->width; i++) + { + png_byte v[8]; + int j; + + png_memcpy(v, sp, pixel_bytes); + + for (j = 0; j < jstop; j++) + { + png_memcpy(dp, v, pixel_bytes); + dp -= pixel_bytes; + } + + sp -= pixel_bytes; + } + break; + } + } + + row_info->width = final_width; + row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth, final_width); + } +#ifndef PNG_READ_PACKSWAP_SUPPORTED + PNG_UNUSED(transformations) /* Silence compiler warning */ +#endif +} +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + +static void +png_read_filter_row_sub(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_size_t i; + png_size_t istop = row_info->rowbytes; + unsigned int bpp = (row_info->pixel_depth + 7) >> 3; + png_bytep rp = row + bpp; + + PNG_UNUSED(prev_row) + + for (i = bpp; i < istop; i++) + { + *rp = (png_byte)(((int)(*rp) + (int)(*(rp-bpp))) & 0xff); + rp++; + } +} + +static void +png_read_filter_row_up(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_size_t i; + png_size_t istop = row_info->rowbytes; + png_bytep rp = row; + png_const_bytep pp = prev_row; + + for (i = 0; i < istop; i++) + { + *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); + rp++; + } +} + +static void +png_read_filter_row_avg(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_size_t i; + png_bytep rp = row; + png_const_bytep pp = prev_row; + unsigned int bpp = (row_info->pixel_depth + 7) >> 3; + png_size_t istop = row_info->rowbytes - bpp; + + for (i = 0; i < bpp; i++) + { + *rp = (png_byte)(((int)(*rp) + + ((int)(*pp++) / 2 )) & 0xff); + + rp++; + } + + for (i = 0; i < istop; i++) + { + *rp = (png_byte)(((int)(*rp) + + (int)(*pp++ + *(rp-bpp)) / 2 ) & 0xff); + + rp++; + } +} + +static void +png_read_filter_row_paeth_1byte_pixel(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + png_bytep rp_end = row + row_info->rowbytes; + int a, c; + + /* First pixel/byte */ + c = *prev_row++; + a = *row + c; + *row++ = (png_byte)a; + + /* Remainder */ + while (row < rp_end) + { + int b, pa, pb, pc, p; + + a &= 0xff; /* From previous iteration or start */ + b = *prev_row++; + + p = b - c; + pc = a - c; + +# ifdef PNG_USE_ABS + pa = abs(p); + pb = abs(pc); + pc = abs(p + pc); +# else + pa = p < 0 ? -p : p; + pb = pc < 0 ? -pc : pc; + pc = (p + pc) < 0 ? -(p + pc) : p + pc; +# endif + + /* Find the best predictor, the least of pa, pb, pc favoring the earlier + * ones in the case of a tie. + */ + if (pb < pa) pa = pb, a = b; + if (pc < pa) a = c; + + /* Calculate the current pixel in a, and move the previous row pixel to c + * for the next time round the loop + */ + c = b; + a += *row; + *row++ = (png_byte)a; + } +} + +static void +png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row, + png_const_bytep prev_row) +{ + int bpp = (row_info->pixel_depth + 7) >> 3; + png_bytep rp_end = row + bpp; + + /* Process the first pixel in the row completely (this is the same as 'up' + * because there is only one candidate predictor for the first row). + */ + while (row < rp_end) + { + int a = *row + *prev_row++; + *row++ = (png_byte)a; + } + + /* Remainder */ + rp_end += row_info->rowbytes - bpp; + + while (row < rp_end) + { + int a, b, c, pa, pb, pc, p; + + c = *(prev_row - bpp); + a = *(row - bpp); + b = *prev_row++; + + p = b - c; + pc = a - c; + +# ifdef PNG_USE_ABS + pa = abs(p); + pb = abs(pc); + pc = abs(p + pc); +# else + pa = p < 0 ? -p : p; + pb = pc < 0 ? -pc : pc; + pc = (p + pc) < 0 ? -(p + pc) : p + pc; +# endif + + if (pb < pa) pa = pb, a = b; + if (pc < pa) a = c; + + c = b; + a += *row; + *row++ = (png_byte)a; + } +} + +#ifdef PNG_ARM_NEON + +#ifdef __linux__ +#include +#include +#include + +static int png_have_hwcap(unsigned cap) +{ + FILE *f = fopen("/proc/self/auxv", "r"); + Elf32_auxv_t aux; + int have_cap = 0; + + if (!f) + return 0; + + while (fread(&aux, sizeof(aux), 1, f) > 0) + { + if (aux.a_type == AT_HWCAP && + aux.a_un.a_val & cap) + { + have_cap = 1; + break; + } + } + + fclose(f); + + return have_cap; +} +#endif /* __linux__ */ + +static void +png_init_filter_functions_neon(png_structp pp, unsigned int bpp) +{ +#ifdef __linux__ + if (!png_have_hwcap(HWCAP_NEON)) + return; +#endif + + pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon; + + if (bpp == 3) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth3_neon; + } + + else if (bpp == 4) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth4_neon; + } +} +#endif /* PNG_ARM_NEON */ + +static void +png_init_filter_functions(png_structp pp) +{ + unsigned int bpp = (pp->pixel_depth + 7) >> 3; + + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub; + pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg; + if (bpp == 1) + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth_1byte_pixel; + else + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = + png_read_filter_row_paeth_multibyte_pixel; + +#ifdef PNG_ARM_NEON + png_init_filter_functions_neon(pp, bpp); +#endif +} + +void /* PRIVATE */ +png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row, + png_const_bytep prev_row, int filter) +{ + if (pp->read_filter[0] == NULL) + png_init_filter_functions(pp); + if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST) + pp->read_filter[filter-1](row_info, row, prev_row); +} + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +void /* PRIVATE */ +png_read_finish_row(png_structp png_ptr) +{ +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ + + /* Start of interlace block */ + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + + /* Offset to next interlace block */ + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + + /* Start of interlace block in the y direction */ + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + + /* Offset to next interlace block in the y direction */ + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + + png_debug(1, "in png_read_finish_row"); + png_ptr->row_number++; + if (png_ptr->row_number < png_ptr->num_rows) + return; + +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (png_ptr->interlaced) + { + png_ptr->row_number = 0; + + /* TO DO: don't do this if prev_row isn't needed (requires + * read-ahead of the next row's filter byte. + */ + png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + + do + { + png_ptr->pass++; + + if (png_ptr->pass >= 7) + break; + + png_ptr->iwidth = (png_ptr->width + + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; + + if (!(png_ptr->transformations & PNG_INTERLACE)) + { + png_ptr->num_rows = (png_ptr->height + + png_pass_yinc[png_ptr->pass] - 1 - + png_pass_ystart[png_ptr->pass]) / + png_pass_yinc[png_ptr->pass]; + } + + else /* if (png_ptr->transformations & PNG_INTERLACE) */ + break; /* libpng deinterlacing sees every row */ + + } while (png_ptr->num_rows == 0 || png_ptr->iwidth == 0); + + if (png_ptr->pass < 7) + return; + } +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + + if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + { + char extra; + int ret; + + png_ptr->zstream.next_out = (Byte *)&extra; + png_ptr->zstream.avail_out = (uInt)1; + + for (;;) + { + if (!(png_ptr->zstream.avail_in)) + { + while (!png_ptr->idat_size) + { + png_crc_finish(png_ptr, 0); + png_ptr->idat_size = png_read_chunk_header(png_ptr); + if (png_ptr->chunk_name != png_IDAT) + png_error(png_ptr, "Not enough image data"); + } + + png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.next_in = png_ptr->zbuf; + + if (png_ptr->zbuf_size > png_ptr->idat_size) + png_ptr->zstream.avail_in = (uInt)png_ptr->idat_size; + + png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zstream.avail_in); + png_ptr->idat_size -= png_ptr->zstream.avail_in; + } + + ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH); + + if (ret == Z_STREAM_END) + { + if (!(png_ptr->zstream.avail_out) || png_ptr->zstream.avail_in || + png_ptr->idat_size) + png_warning(png_ptr, "Extra compressed data"); + + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + break; + } + + if (ret != Z_OK) + png_error(png_ptr, png_ptr->zstream.msg ? png_ptr->zstream.msg : + "Decompression Error"); + + if (!(png_ptr->zstream.avail_out)) + { + png_warning(png_ptr, "Extra compressed data"); + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; + break; + } + + } + png_ptr->zstream.avail_out = 0; + } + + if (png_ptr->idat_size || png_ptr->zstream.avail_in) + png_warning(png_ptr, "Extra compression data"); + + inflateReset(&png_ptr->zstream); + + png_ptr->mode |= PNG_AFTER_IDAT; +} +#endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ + +void /* PRIVATE */ +png_read_start_row(png_structp png_ptr) +{ +#ifdef PNG_READ_INTERLACING_SUPPORTED + /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ + + /* Start of interlace block */ + static PNG_CONST png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; + + /* Offset to next interlace block */ + static PNG_CONST png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; + + /* Start of interlace block in the y direction */ + static PNG_CONST png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1}; + + /* Offset to next interlace block in the y direction */ + static PNG_CONST png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2}; +#endif + + int max_pixel_depth; + png_size_t row_bytes; + + png_debug(1, "in png_read_start_row"); + png_ptr->zstream.avail_in = 0; +#ifdef PNG_READ_TRANSFORMS_SUPPORTED + png_init_read_transformations(png_ptr); +#endif +#ifdef PNG_READ_INTERLACING_SUPPORTED + if (png_ptr->interlaced) + { + if (!(png_ptr->transformations & PNG_INTERLACE)) + png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - + png_pass_ystart[0]) / png_pass_yinc[0]; + + else + png_ptr->num_rows = png_ptr->height; + + png_ptr->iwidth = (png_ptr->width + + png_pass_inc[png_ptr->pass] - 1 - + png_pass_start[png_ptr->pass]) / + png_pass_inc[png_ptr->pass]; + } + + else +#endif /* PNG_READ_INTERLACING_SUPPORTED */ + { + png_ptr->num_rows = png_ptr->height; + png_ptr->iwidth = png_ptr->width; + } + + max_pixel_depth = png_ptr->pixel_depth; + + /* WARNING: * png_read_transform_info (pngrtran.c) performs a simpliar set of + * calculations to calculate the final pixel depth, then + * png_do_read_transforms actually does the transforms. This means that the + * code which effectively calculates this value is actually repeated in three + * separate places. They must all match. Innocent changes to the order of + * transformations can and will break libpng in a way that causes memory + * overwrites. + * + * TODO: fix this. + */ +#ifdef PNG_READ_PACK_SUPPORTED + if ((png_ptr->transformations & PNG_PACK) && png_ptr->bit_depth < 8) + max_pixel_depth = 8; +#endif + +#ifdef PNG_READ_EXPAND_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND) + { + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (png_ptr->num_trans) + max_pixel_depth = 32; + + else + max_pixel_depth = 24; + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) + { + if (max_pixel_depth < 8) + max_pixel_depth = 8; + + if (png_ptr->num_trans) + max_pixel_depth *= 2; + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) + { + if (png_ptr->num_trans) + { + max_pixel_depth *= 4; + max_pixel_depth /= 3; + } + } + } +#endif + +#ifdef PNG_READ_EXPAND_16_SUPPORTED + if (png_ptr->transformations & PNG_EXPAND_16) + { +# ifdef PNG_READ_EXPAND_SUPPORTED + /* In fact it is an error if it isn't supported, but checking is + * the safe way. + */ + if (png_ptr->transformations & PNG_EXPAND) + { + if (png_ptr->bit_depth < 16) + max_pixel_depth *= 2; + } + else +# endif + png_ptr->transformations &= ~PNG_EXPAND_16; + } +#endif + +#ifdef PNG_READ_FILLER_SUPPORTED + if (png_ptr->transformations & (PNG_FILLER)) + { + if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) + { + if (max_pixel_depth <= 8) + max_pixel_depth = 16; + + else + max_pixel_depth = 32; + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB || + png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + { + if (max_pixel_depth <= 32) + max_pixel_depth = 32; + + else + max_pixel_depth = 64; + } + } +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED + if (png_ptr->transformations & PNG_GRAY_TO_RGB) + { + if ( +#ifdef PNG_READ_EXPAND_SUPPORTED + (png_ptr->num_trans && (png_ptr->transformations & PNG_EXPAND)) || +#endif +#ifdef PNG_READ_FILLER_SUPPORTED + (png_ptr->transformations & (PNG_FILLER)) || +#endif + png_ptr->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + { + if (max_pixel_depth <= 16) + max_pixel_depth = 32; + + else + max_pixel_depth = 64; + } + + else + { + if (max_pixel_depth <= 8) + { + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + max_pixel_depth = 32; + + else + max_pixel_depth = 24; + } + + else if (png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + max_pixel_depth = 64; + + else + max_pixel_depth = 48; + } + } +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) && \ +defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) + if (png_ptr->transformations & PNG_USER_TRANSFORM) + { + int user_pixel_depth = png_ptr->user_transform_depth * + png_ptr->user_transform_channels; + + if (user_pixel_depth > max_pixel_depth) + max_pixel_depth = user_pixel_depth; + } +#endif + + /* This value is stored in png_struct and double checked in the row read + * code. + */ + png_ptr->maximum_pixel_depth = (png_byte)max_pixel_depth; + png_ptr->transformed_pixel_depth = 0; /* calculated on demand */ + + /* Align the width on the next larger 8 pixels. Mainly used + * for interlacing + */ + row_bytes = ((png_ptr->width + 7) & ~((png_uint_32)7)); + /* Calculate the maximum bytes needed, adding a byte and a pixel + * for safety's sake + */ + row_bytes = PNG_ROWBYTES(max_pixel_depth, row_bytes) + + 1 + ((max_pixel_depth + 7) >> 3); + +#ifdef PNG_MAX_MALLOC_64K + if (row_bytes > (png_uint_32)65536L) + png_error(png_ptr, "This image requires a row greater than 64KB"); +#endif + + if (row_bytes + 48 > png_ptr->old_big_row_buf_size) + { + png_free(png_ptr, png_ptr->big_row_buf); + png_free(png_ptr, png_ptr->big_prev_row); + + if (png_ptr->interlaced) + png_ptr->big_row_buf = (png_bytep)png_calloc(png_ptr, + row_bytes + 48); + + else + png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 48); + + png_ptr->big_prev_row = (png_bytep)png_malloc(png_ptr, row_bytes + 48); + +#ifdef PNG_ALIGNED_MEMORY_SUPPORTED + /* Use 16-byte aligned memory for row_buf with at least 16 bytes + * of padding before and after row_buf; treat prev_row similarly. + * NOTE: the alignment is to the start of the pixels, one beyond the start + * of the buffer, because of the filter byte. Prior to libpng 1.5.6 this + * was incorrect; the filter byte was aligned, which had the exact + * opposite effect of that intended. + */ + { + png_bytep temp = png_ptr->big_row_buf + 32; + int extra = (int)((temp - (png_bytep)0) & 0x0f); + png_ptr->row_buf = temp - extra - 1/*filter byte*/; + + temp = png_ptr->big_prev_row + 32; + extra = (int)((temp - (png_bytep)0) & 0x0f); + png_ptr->prev_row = temp - extra - 1/*filter byte*/; + } + +#else + /* Use 31 bytes of padding before and 17 bytes after row_buf. */ + png_ptr->row_buf = png_ptr->big_row_buf + 31; + png_ptr->prev_row = png_ptr->big_prev_row + 31; +#endif + png_ptr->old_big_row_buf_size = row_bytes + 48; + } + +#ifdef PNG_MAX_MALLOC_64K + if (png_ptr->rowbytes > 65535) + png_error(png_ptr, "This image requires a row greater than 64KB"); + +#endif + if (png_ptr->rowbytes > (PNG_SIZE_MAX - 1)) + png_error(png_ptr, "Row has too many bytes to allocate in memory"); + + png_memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); + + png_debug1(3, "width = %u,", png_ptr->width); + png_debug1(3, "height = %u,", png_ptr->height); + png_debug1(3, "iwidth = %u,", png_ptr->iwidth); + png_debug1(3, "num_rows = %u,", png_ptr->num_rows); + png_debug1(3, "rowbytes = %lu,", (unsigned long)png_ptr->rowbytes); + png_debug1(3, "irowbytes = %lu", + (unsigned long)PNG_ROWBYTES(png_ptr->pixel_depth, png_ptr->iwidth) + 1); + + png_ptr->flags |= PNG_FLAG_ROW_INIT; +} +#endif /* PNG_READ_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngset.c b/ExternalLibs/glpng/png/pngset.c index adfd825..e753ca8 100644 --- a/ExternalLibs/glpng/png/pngset.c +++ b/ExternalLibs/glpng/png/pngset.c @@ -1,381 +1,1284 @@ - -/* pngset.c - storage of image information into info struct - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - * - * The functions here are used during reads to store data from the file - * into the info struct, and during writes to store application data - * into the info struct for writing into the file. This abstracts the - * info struct and allows us to change the structure in the future. - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_READ_bKGD_SUPPORTED) || defined(PNG_WRITE_bKGD_SUPPORTED) -void -png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) -{ - png_debug1(1, "in %s storage function\n", "bKGD"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->background), background, sizeof(png_color_16)); - info_ptr->valid |= PNG_INFO_bKGD; -} -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED) -void -png_set_cHRM(png_structp png_ptr, png_infop info_ptr, - double white_x, double white_y, double red_x, double red_y, - double green_x, double green_y, double blue_x, double blue_y) -{ - png_debug1(1, "in %s storage function\n", "cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_white = (float)white_x; - info_ptr->y_white = (float)white_y; - info_ptr->x_red = (float)red_x; - info_ptr->y_red = (float)red_y; - info_ptr->x_green = (float)green_x; - info_ptr->y_green = (float)green_y; - info_ptr->x_blue = (float)blue_x; - info_ptr->y_blue = (float)blue_y; - info_ptr->valid |= PNG_INFO_cHRM; -} -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) -void -png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) -{ - png_debug1(1, "in %s storage function\n", "gAMA"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->gamma = (float)file_gamma; - info_ptr->valid |= PNG_INFO_gAMA; -} -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) || defined(PNG_WRITE_hIST_SUPPORTED) -void -png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) -{ - png_debug1(1, "in %s storage function\n", "hIST"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->hist = hist; - info_ptr->valid |= PNG_INFO_hIST; -} -#endif - -void -png_set_IHDR(png_structp png_ptr, png_infop info_ptr, - png_uint_32 width, png_uint_32 height, int bit_depth, - int color_type, int interlace_type, int compression_type, - int filter_type) -{ - int rowbytes_per_pixel; - png_debug1(1, "in %s storage function\n", "IHDR"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->width = width; - info_ptr->height = height; - info_ptr->bit_depth = (png_byte)bit_depth; - info_ptr->color_type =(png_byte) color_type; - info_ptr->compression_type = (png_byte)compression_type; - info_ptr->filter_type = (png_byte)filter_type; - info_ptr->interlace_type = (png_byte)interlace_type; - if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) - info_ptr->channels = 1; - else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) - info_ptr->channels = 3; - else - info_ptr->channels = 1; - if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) - info_ptr->channels++; - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); - - /* check for overflow */ - rowbytes_per_pixel = (info_ptr->pixel_depth + 7) >> 3; - if (( width > (png_uint_32)2147483647L/rowbytes_per_pixel)) - { - png_warning(png_ptr, - "Width too large to process image data; rowbytes will overflow."); - info_ptr->rowbytes = (png_size_t)0; - } - else - info_ptr->rowbytes = (info_ptr->width * info_ptr->pixel_depth + 7) >> 3; -} - -#if defined(PNG_READ_oFFs_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) -void -png_set_oFFs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 offset_x, png_uint_32 offset_y, int unit_type) -{ - png_debug1(1, "in %s storage function\n", "oFFs"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_offset = offset_x; - info_ptr->y_offset = offset_y; - info_ptr->offset_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_oFFs; -} -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) -void -png_set_pCAL(png_structp png_ptr, png_infop info_ptr, - png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, - png_charp units, png_charpp params) -{ - png_uint_32 length; - int i; - - png_debug1(1, "in %s storage function\n", "pCAL"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - length = png_strlen(purpose) + 1; - png_debug1(3, "allocating purpose for info (%d bytes)\n", length); - info_ptr->pcal_purpose = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); - - png_debug(3, "storing X0, X1, type, and nparams in info\n"); - info_ptr->pcal_X0 = X0; - info_ptr->pcal_X1 = X1; - info_ptr->pcal_type = (png_byte)type; - info_ptr->pcal_nparams = (png_byte)nparams; - - length = png_strlen(units) + 1; - png_debug1(3, "allocating units for info (%d bytes)\n", length); - info_ptr->pcal_units = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); - - info_ptr->pcal_params = (png_charpp)png_malloc(png_ptr, - (png_uint_32)((nparams + 1) * sizeof(png_charp))); - info_ptr->pcal_params[nparams] = NULL; - - for (i = 0; i < nparams; i++) - { - length = png_strlen(params[i]) + 1; - png_debug2(3, "allocating parameter %d for info (%d bytes)\n", i, length); - info_ptr->pcal_params[i] = (png_charp)png_malloc(png_ptr, length); - png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); - } - - info_ptr->valid |= PNG_INFO_pCAL; -} -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) || defined(PNG_WRITE_pHYs_SUPPORTED) -void -png_set_pHYs(png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type) -{ - png_debug1(1, "in %s storage function\n", "pHYs"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->x_pixels_per_unit = res_x; - info_ptr->y_pixels_per_unit = res_y; - info_ptr->phys_unit_type = (png_byte)unit_type; - info_ptr->valid |= PNG_INFO_pHYs; -} -#endif - -void -png_set_PLTE(png_structp png_ptr, png_infop info_ptr, - png_colorp palette, int num_palette) -{ - png_debug1(1, "in %s storage function\n", "PLTE"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->palette = palette; - info_ptr->num_palette = (png_uint_16)num_palette; - info_ptr->valid |= PNG_INFO_PLTE; -} - -#if defined(PNG_READ_sBIT_SUPPORTED) || defined(PNG_WRITE_sBIT_SUPPORTED) -void -png_set_sBIT(png_structp png_ptr, png_infop info_ptr, - png_color_8p sig_bit) -{ - png_debug1(1, "in %s storage function\n", "sBIT"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->sig_bit), sig_bit, sizeof (png_color_8)); - info_ptr->valid |= PNG_INFO_sBIT; -} -#endif - -#if defined(PNG_READ_sRGB_SUPPORTED) || defined(PNG_WRITE_sRGB_SUPPORTED) -void -png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) -{ - png_debug1(1, "in %s storage function\n", "sRGB"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - info_ptr->srgb_intent = (png_byte)intent; - info_ptr->valid |= PNG_INFO_sRGB; -} -void -png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, - int intent) -{ -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) - float file_gamma; -#endif -#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED) - float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; -#endif - png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_set_sRGB(png_ptr, info_ptr, intent); - -#if defined(PNG_READ_gAMA_SUPPORTED) || defined(PNG_WRITE_gAMA_SUPPORTED) - file_gamma = (float).45; - png_set_gAMA(png_ptr, info_ptr, file_gamma); -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) || defined(PNG_WRITE_cHRM_SUPPORTED) - white_x = (float).3127; - white_y = (float).3290; - red_x = (float).64; - red_y = (float).33; - green_x = (float).30; - green_y = (float).60; - blue_x = (float).15; - blue_y = (float).06; - - png_set_cHRM(png_ptr, info_ptr, - white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); - -#endif -} -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ - defined(PNG_READ_zTXt_SUPPORTED) || defined(PNG_WRITE_zTXt_SUPPORTED) -void -png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, - int num_text) -{ - int i; - - png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ? - "text" : (png_const_charp)png_ptr->chunk_name)); - - if (png_ptr == NULL || info_ptr == NULL || num_text == 0) - return; - - /* Make sure we have enough space in the "text" array in info_struct - * to hold all of the incoming text_ptr objects. - */ - if (info_ptr->num_text + num_text > info_ptr->max_text) - { - if (info_ptr->text != NULL) - { - png_textp old_text; - int old_max; - - old_max = info_ptr->max_text; - info_ptr->max_text = info_ptr->num_text + num_text + 8; - old_text = info_ptr->text; - info_ptr->text = (png_textp)png_malloc(png_ptr, - (png_uint_32)(info_ptr->max_text * sizeof (png_text))); - png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * - sizeof(png_text))); - png_free(png_ptr, old_text); - } - else - { - info_ptr->max_text = num_text + 8; - info_ptr->num_text = 0; - info_ptr->text = (png_textp)png_malloc(png_ptr, - (png_uint_32)(info_ptr->max_text * sizeof (png_text))); - } - png_debug1(3, "allocated %d entries for info_ptr->text\n", - info_ptr->max_text); - } - - for (i = 0; i < num_text; i++) - { - png_textp textp = &(info_ptr->text[info_ptr->num_text]); - - if (text_ptr[i].text == NULL) - text_ptr[i].text = (png_charp)""; - - if (text_ptr[i].text[0] == '\0') - { - textp->text_length = 0; - textp->compression = PNG_TEXT_COMPRESSION_NONE; - } - else - { - textp->text_length = png_strlen(text_ptr[i].text); - textp->compression = text_ptr[i].compression; - } - textp->text = text_ptr[i].text; - textp->key = text_ptr[i].key; - info_ptr->num_text++; - png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text); - } -} -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) || defined(PNG_WRITE_tIME_SUPPORTED) -void -png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) -{ - png_debug1(1, "in %s storage function\n", "tIME"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - png_memcpy(&(info_ptr->mod_time), mod_time, sizeof (png_time)); - info_ptr->valid |= PNG_INFO_tIME; -} -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) || defined(PNG_WRITE_tRNS_SUPPORTED) -void -png_set_tRNS(png_structp png_ptr, png_infop info_ptr, - png_bytep trans, int num_trans, png_color_16p trans_values) -{ - png_debug1(1, "in %s storage function\n", "tRNS"); - if (png_ptr == NULL || info_ptr == NULL) - return; - - if (trans != NULL) - { - info_ptr->trans = trans; - } - - if (trans_values != NULL) - { - png_memcpy(&(info_ptr->trans_values), trans_values, - sizeof(png_color_16)); - if (num_trans == 0) - num_trans = 1; - } - info_ptr->num_trans = (png_uint_16)num_trans; - info_ptr->valid |= PNG_INFO_tRNS; -} -#endif - - + +/* pngset.c - storage of image information into info struct + * + * Last changed in libpng 1.5.7 [December 15, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * The functions here are used during reads to store data from the file + * into the info struct, and during writes to store application data + * into the info struct for writing into the file. This abstracts the + * info struct and allows us to change the structure in the future. + */ + +#include "pngpriv.h" + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +#ifdef PNG_bKGD_SUPPORTED +void PNGAPI +png_set_bKGD(png_structp png_ptr, png_infop info_ptr, + png_const_color_16p background) +{ + png_debug1(1, "in %s storage function", "bKGD"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); + info_ptr->valid |= PNG_INFO_bKGD; +} +#endif + +#ifdef PNG_cHRM_SUPPORTED +void PNGFAPI +png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, + png_fixed_point blue_x, png_fixed_point blue_y) +{ + png_debug1(1, "in %s storage function", "cHRM fixed"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + +# ifdef PNG_CHECK_cHRM_SUPPORTED + if (png_check_cHRM_fixed(png_ptr, + white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) +# endif + { + info_ptr->x_white = white_x; + info_ptr->y_white = white_y; + info_ptr->x_red = red_x; + info_ptr->y_red = red_y; + info_ptr->x_green = green_x; + info_ptr->y_green = green_y; + info_ptr->x_blue = blue_x; + info_ptr->y_blue = blue_y; + info_ptr->valid |= PNG_INFO_cHRM; + } +} + +void PNGFAPI +png_set_cHRM_XYZ_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_red_Z, png_fixed_point int_green_X, + png_fixed_point int_green_Y, png_fixed_point int_green_Z, + png_fixed_point int_blue_X, png_fixed_point int_blue_Y, + png_fixed_point int_blue_Z) +{ + png_XYZ XYZ; + png_xy xy; + + png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + XYZ.redX = int_red_X; + XYZ.redY = int_red_Y; + XYZ.redZ = int_red_Z; + XYZ.greenX = int_green_X; + XYZ.greenY = int_green_Y; + XYZ.greenZ = int_green_Z; + XYZ.blueX = int_blue_X; + XYZ.blueY = int_blue_Y; + XYZ.blueZ = int_blue_Z; + + if (png_xy_from_XYZ(&xy, XYZ)) + png_error(png_ptr, "XYZ values out of representable range"); + + png_set_cHRM_fixed(png_ptr, info_ptr, xy.whitex, xy.whitey, xy.redx, xy.redy, + xy.greenx, xy.greeny, xy.bluex, xy.bluey); +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_cHRM(png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, + double green_x, double green_y, double blue_x, double blue_y) +{ + png_set_cHRM_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, white_x, "cHRM White X"), + png_fixed(png_ptr, white_y, "cHRM White Y"), + png_fixed(png_ptr, red_x, "cHRM Red X"), + png_fixed(png_ptr, red_y, "cHRM Red Y"), + png_fixed(png_ptr, green_x, "cHRM Green X"), + png_fixed(png_ptr, green_y, "cHRM Green Y"), + png_fixed(png_ptr, blue_x, "cHRM Blue X"), + png_fixed(png_ptr, blue_y, "cHRM Blue Y")); +} + +void PNGAPI +png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X, + double red_Y, double red_Z, double green_X, double green_Y, double green_Z, + double blue_X, double blue_Y, double blue_Z) +{ + png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, + png_fixed(png_ptr, red_X, "cHRM Red X"), + png_fixed(png_ptr, red_Y, "cHRM Red Y"), + png_fixed(png_ptr, red_Z, "cHRM Red Z"), + png_fixed(png_ptr, green_X, "cHRM Red X"), + png_fixed(png_ptr, green_Y, "cHRM Red Y"), + png_fixed(png_ptr, green_Z, "cHRM Red Z"), + png_fixed(png_ptr, blue_X, "cHRM Red X"), + png_fixed(png_ptr, blue_Y, "cHRM Red Y"), + png_fixed(png_ptr, blue_Z, "cHRM Red Z")); +} +# endif /* PNG_FLOATING_POINT_SUPPORTED */ + +#endif /* PNG_cHRM_SUPPORTED */ + +#ifdef PNG_gAMA_SUPPORTED +void PNGFAPI +png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point + file_gamma) +{ + png_debug1(1, "in %s storage function", "gAMA"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + /* Changed in libpng-1.5.4 to limit the values to ensure overflow can't + * occur. Since the fixed point representation is assymetrical it is + * possible for 1/gamma to overflow the limit of 21474 and this means the + * gamma value must be at least 5/100000 and hence at most 20000.0. For + * safety the limits here are a little narrower. The values are 0.00016 to + * 6250.0, which are truly ridiculous gammma values (and will produce + * displays that are all black or all white.) + */ + if (file_gamma < 16 || file_gamma > 625000000) + png_warning(png_ptr, "Out of range gamma value ignored"); + + else + { + info_ptr->gamma = file_gamma; + info_ptr->valid |= PNG_INFO_gAMA; + } +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +{ + png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, + "png_set_gAMA")); +} +# endif +#endif + +#ifdef PNG_hIST_SUPPORTED +void PNGAPI +png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist) +{ + int i; + + png_debug1(1, "in %s storage function", "hIST"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (info_ptr->num_palette == 0 || info_ptr->num_palette + > PNG_MAX_PALETTE_LENGTH) + { + png_warning(png_ptr, + "Invalid palette size, hIST allocation skipped"); + + return; + } + + png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); + + /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in + * version 1.2.1 + */ + png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)); + + if (png_ptr->hist == NULL) + { + png_warning(png_ptr, "Insufficient memory for hIST chunk data"); + return; + } + + for (i = 0; i < info_ptr->num_palette; i++) + png_ptr->hist[i] = hist[i]; + + info_ptr->hist = png_ptr->hist; + info_ptr->valid |= PNG_INFO_hIST; + info_ptr->free_me |= PNG_FREE_HIST; +} +#endif + +void PNGAPI +png_set_IHDR(png_structp png_ptr, png_infop info_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type) +{ + png_debug1(1, "in %s storage function", "IHDR"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->width = width; + info_ptr->height = height; + info_ptr->bit_depth = (png_byte)bit_depth; + info_ptr->color_type = (png_byte)color_type; + info_ptr->compression_type = (png_byte)compression_type; + info_ptr->filter_type = (png_byte)filter_type; + info_ptr->interlace_type = (png_byte)interlace_type; + + png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, + info_ptr->compression_type, info_ptr->filter_type); + + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + info_ptr->channels = 1; + + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + info_ptr->channels = 3; + + else + info_ptr->channels = 1; + + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + info_ptr->channels++; + + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); + + /* Check for potential overflow */ + if (width > + (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */ + - 48 /* bigrowbuf hack */ + - 1 /* filter byte */ + - 7*8 /* rounding of width to multiple of 8 pixels */ + - 8) /* extra max_pixel_depth pad */ + info_ptr->rowbytes = 0; + else + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); +} + +#ifdef PNG_oFFs_SUPPORTED +void PNGAPI +png_set_oFFs(png_structp png_ptr, png_infop info_ptr, + png_int_32 offset_x, png_int_32 offset_y, int unit_type) +{ + png_debug1(1, "in %s storage function", "oFFs"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->x_offset = offset_x; + info_ptr->y_offset = offset_y; + info_ptr->offset_unit_type = (png_byte)unit_type; + info_ptr->valid |= PNG_INFO_oFFs; +} +#endif + +#ifdef PNG_pCAL_SUPPORTED +void PNGAPI +png_set_pCAL(png_structp png_ptr, png_infop info_ptr, + png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, + int nparams, png_const_charp units, png_charpp params) +{ + png_size_t length; + int i; + + png_debug1(1, "in %s storage function", "pCAL"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + length = png_strlen(purpose) + 1; + png_debug1(3, "allocating purpose for info (%lu bytes)", + (unsigned long)length); + + /* TODO: validate format of calibration name and unit name */ + + /* Check that the type matches the specification. */ + if (type < 0 || type > 3) + png_error(png_ptr, "Invalid pCAL equation type"); + + /* Validate params[nparams] */ + for (i=0; ipcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + + if (info_ptr->pcal_purpose == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL purpose"); + return; + } + + png_memcpy(info_ptr->pcal_purpose, purpose, length); + + png_debug(3, "storing X0, X1, type, and nparams in info"); + info_ptr->pcal_X0 = X0; + info_ptr->pcal_X1 = X1; + info_ptr->pcal_type = (png_byte)type; + info_ptr->pcal_nparams = (png_byte)nparams; + + length = png_strlen(units) + 1; + png_debug1(3, "allocating units for info (%lu bytes)", + (unsigned long)length); + + info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + + if (info_ptr->pcal_units == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL units"); + return; + } + + png_memcpy(info_ptr->pcal_units, units, length); + + info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, + (png_size_t)((nparams + 1) * png_sizeof(png_charp))); + + if (info_ptr->pcal_params == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL params"); + return; + } + + png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); + + for (i = 0; i < nparams; i++) + { + length = png_strlen(params[i]) + 1; + png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, + (unsigned long)length); + + info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); + + if (info_ptr->pcal_params[i] == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL parameter"); + return; + } + + png_memcpy(info_ptr->pcal_params[i], params[i], length); + } + + info_ptr->valid |= PNG_INFO_pCAL; + info_ptr->free_me |= PNG_FREE_PCAL; +} +#endif + +#ifdef PNG_sCAL_SUPPORTED +void PNGAPI +png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, + int unit, png_const_charp swidth, png_const_charp sheight) +{ + png_size_t lengthw = 0, lengthh = 0; + + png_debug1(1, "in %s storage function", "sCAL"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + /* Double check the unit (should never get here with an invalid + * unit unless this is an API call.) + */ + if (unit != 1 && unit != 2) + png_error(png_ptr, "Invalid sCAL unit"); + + if (swidth == NULL || (lengthw = png_strlen(swidth)) == 0 || + swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) + png_error(png_ptr, "Invalid sCAL width"); + + if (sheight == NULL || (lengthh = png_strlen(sheight)) == 0 || + sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) + png_error(png_ptr, "Invalid sCAL height"); + + info_ptr->scal_unit = (png_byte)unit; + + ++lengthw; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); + + info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, lengthw); + + if (info_ptr->scal_s_width == NULL) + { + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; + } + + png_memcpy(info_ptr->scal_s_width, swidth, lengthw); + + ++lengthh; + + png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); + + info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, lengthh); + + if (info_ptr->scal_s_height == NULL) + { + png_free (png_ptr, info_ptr->scal_s_width); + info_ptr->scal_s_width = NULL; + + png_warning(png_ptr, "Memory allocation failed while processing sCAL"); + return; + } + + png_memcpy(info_ptr->scal_s_height, sheight, lengthh); + + info_ptr->valid |= PNG_INFO_sCAL; + info_ptr->free_me |= PNG_FREE_SCAL; +} + +# ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_sCAL(png_structp png_ptr, png_infop info_ptr, int unit, double width, + double height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fp(png_ptr, swidth, sizeof swidth, width, + PNG_sCAL_PRECISION); + png_ascii_from_fp(png_ptr, sheight, sizeof sheight, height, + PNG_sCAL_PRECISION); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif + +# ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_sCAL_fixed(png_structp png_ptr, png_infop info_ptr, int unit, + png_fixed_point width, png_fixed_point height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + /* Check the arguments. */ + if (width <= 0) + png_warning(png_ptr, "Invalid sCAL width ignored"); + + else if (height <= 0) + png_warning(png_ptr, "Invalid sCAL height ignored"); + + else + { + /* Convert 'width' and 'height' to ASCII. */ + char swidth[PNG_sCAL_MAX_DIGITS+1]; + char sheight[PNG_sCAL_MAX_DIGITS+1]; + + png_ascii_from_fixed(png_ptr, swidth, sizeof swidth, width); + png_ascii_from_fixed(png_ptr, sheight, sizeof sheight, height); + + png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); + } +} +# endif +#endif + +#ifdef PNG_pHYs_SUPPORTED +void PNGAPI +png_set_pHYs(png_structp png_ptr, png_infop info_ptr, + png_uint_32 res_x, png_uint_32 res_y, int unit_type) +{ + png_debug1(1, "in %s storage function", "pHYs"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->x_pixels_per_unit = res_x; + info_ptr->y_pixels_per_unit = res_y; + info_ptr->phys_unit_type = (png_byte)unit_type; + info_ptr->valid |= PNG_INFO_pHYs; +} +#endif + +void PNGAPI +png_set_PLTE(png_structp png_ptr, png_infop info_ptr, + png_const_colorp palette, int num_palette) +{ + + png_debug1(1, "in %s storage function", "PLTE"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) + { + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + png_error(png_ptr, "Invalid palette length"); + + else + { + png_warning(png_ptr, "Invalid palette length"); + return; + } + } + + /* It may not actually be necessary to set png_ptr->palette here; + * we do it for backward compatibility with the way the png_handle_tRNS + * function used to do the allocation. + */ + png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); + + /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead + * of num_palette entries, in case of an invalid PNG file that has + * too-large sample values. + */ + png_ptr->palette = (png_colorp)png_calloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + + png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); + info_ptr->palette = png_ptr->palette; + info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; + + info_ptr->free_me |= PNG_FREE_PLTE; + + info_ptr->valid |= PNG_INFO_PLTE; +} + +#ifdef PNG_sBIT_SUPPORTED +void PNGAPI +png_set_sBIT(png_structp png_ptr, png_infop info_ptr, + png_const_color_8p sig_bit) +{ + png_debug1(1, "in %s storage function", "sBIT"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); + info_ptr->valid |= PNG_INFO_sBIT; +} +#endif + +#ifdef PNG_sRGB_SUPPORTED +void PNGAPI +png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int srgb_intent) +{ + png_debug1(1, "in %s storage function", "sRGB"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->srgb_intent = (png_byte)srgb_intent; + info_ptr->valid |= PNG_INFO_sRGB; +} + +void PNGAPI +png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, + int srgb_intent) +{ + png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_set_sRGB(png_ptr, info_ptr, srgb_intent); + +# ifdef PNG_gAMA_SUPPORTED + png_set_gAMA_fixed(png_ptr, info_ptr, PNG_GAMMA_sRGB_INVERSE); +# endif + +# ifdef PNG_cHRM_SUPPORTED + png_set_cHRM_fixed(png_ptr, info_ptr, + /* color x y */ + /* white */ 31270, 32900, + /* red */ 64000, 33000, + /* green */ 30000, 60000, + /* blue */ 15000, 6000 + ); +# endif /* cHRM */ +} +#endif /* sRGB */ + + +#ifdef PNG_iCCP_SUPPORTED +void PNGAPI +png_set_iCCP(png_structp png_ptr, png_infop info_ptr, + png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen) +{ + png_charp new_iccp_name; + png_bytep new_iccp_profile; + png_size_t length; + + png_debug1(1, "in %s storage function", "iCCP"); + + if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) + return; + + length = png_strlen(name)+1; + new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + + if (new_iccp_name == NULL) + { + png_warning(png_ptr, "Insufficient memory to process iCCP chunk"); + return; + } + + png_memcpy(new_iccp_name, name, length); + new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen); + + if (new_iccp_profile == NULL) + { + png_free (png_ptr, new_iccp_name); + png_warning(png_ptr, + "Insufficient memory to process iCCP profile"); + return; + } + + png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); + + png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); + + info_ptr->iccp_proflen = proflen; + info_ptr->iccp_name = new_iccp_name; + info_ptr->iccp_profile = new_iccp_profile; + /* Compression is always zero but is here so the API and info structure + * does not have to change if we introduce multiple compression types + */ + info_ptr->iccp_compression = (png_byte)compression_type; + info_ptr->free_me |= PNG_FREE_ICCP; + info_ptr->valid |= PNG_INFO_iCCP; +} +#endif + +#ifdef PNG_TEXT_SUPPORTED +void PNGAPI +png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr, + int num_text) +{ + int ret; + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); + + if (ret) + png_error(png_ptr, "Insufficient memory to store text"); +} + +int /* PRIVATE */ +png_set_text_2(png_structp png_ptr, png_infop info_ptr, + png_const_textp text_ptr, int num_text) +{ + int i; + + png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" : + (unsigned long)png_ptr->chunk_name); + + if (png_ptr == NULL || info_ptr == NULL || num_text == 0) + return(0); + + /* Make sure we have enough space in the "text" array in info_struct + * to hold all of the incoming text_ptr objects. + */ + if (info_ptr->num_text + num_text > info_ptr->max_text) + { + if (info_ptr->text != NULL) + { + png_textp old_text; + int old_max; + + old_max = info_ptr->max_text; + info_ptr->max_text = info_ptr->num_text + num_text + 8; + old_text = info_ptr->text; + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, + (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + + if (info_ptr->text == NULL) + { + png_free(png_ptr, old_text); + return(1); + } + + png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * + png_sizeof(png_text))); + png_free(png_ptr, old_text); + } + + else + { + info_ptr->max_text = num_text + 8; + info_ptr->num_text = 0; + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, + (png_size_t)(info_ptr->max_text * png_sizeof(png_text))); + if (info_ptr->text == NULL) + return(1); + info_ptr->free_me |= PNG_FREE_TEXT; + } + + png_debug1(3, "allocated %d entries for info_ptr->text", + info_ptr->max_text); + } + for (i = 0; i < num_text; i++) + { + png_size_t text_length, key_len; + png_size_t lang_len, lang_key_len; + png_textp textp = &(info_ptr->text[info_ptr->num_text]); + + if (text_ptr[i].key == NULL) + continue; + + if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || + text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) + { + png_warning(png_ptr, "text compression mode is out of range"); + continue; + } + + key_len = png_strlen(text_ptr[i].key); + + if (text_ptr[i].compression <= 0) + { + lang_len = 0; + lang_key_len = 0; + } + + else +# ifdef PNG_iTXt_SUPPORTED + { + /* Set iTXt data */ + + if (text_ptr[i].lang != NULL) + lang_len = png_strlen(text_ptr[i].lang); + + else + lang_len = 0; + + if (text_ptr[i].lang_key != NULL) + lang_key_len = png_strlen(text_ptr[i].lang_key); + + else + lang_key_len = 0; + } +# else /* PNG_iTXt_SUPPORTED */ + { + png_warning(png_ptr, "iTXt chunk not supported"); + continue; + } +# endif + + if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') + { + text_length = 0; +# ifdef PNG_iTXt_SUPPORTED + if (text_ptr[i].compression > 0) + textp->compression = PNG_ITXT_COMPRESSION_NONE; + + else +# endif + textp->compression = PNG_TEXT_COMPRESSION_NONE; + } + + else + { + text_length = png_strlen(text_ptr[i].text); + textp->compression = text_ptr[i].compression; + } + + textp->key = (png_charp)png_malloc_warn(png_ptr, + (png_size_t) + (key_len + text_length + lang_len + lang_key_len + 4)); + + if (textp->key == NULL) + return(1); + + png_debug2(2, "Allocated %lu bytes at %p in png_set_text", + (unsigned long)(png_uint_32) + (key_len + lang_len + lang_key_len + text_length + 4), + textp->key); + + png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); + *(textp->key + key_len) = '\0'; + + if (text_ptr[i].compression > 0) + { + textp->lang = textp->key + key_len + 1; + png_memcpy(textp->lang, text_ptr[i].lang, lang_len); + *(textp->lang + lang_len) = '\0'; + textp->lang_key = textp->lang + lang_len + 1; + png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); + *(textp->lang_key + lang_key_len) = '\0'; + textp->text = textp->lang_key + lang_key_len + 1; + } + + else + { + textp->lang=NULL; + textp->lang_key=NULL; + textp->text = textp->key + key_len + 1; + } + + if (text_length) + png_memcpy(textp->text, text_ptr[i].text, + (png_size_t)(text_length)); + + *(textp->text + text_length) = '\0'; + +# ifdef PNG_iTXt_SUPPORTED + if (textp->compression > 0) + { + textp->text_length = 0; + textp->itxt_length = text_length; + } + + else +# endif + { + textp->text_length = text_length; + textp->itxt_length = 0; + } + + info_ptr->num_text++; + png_debug1(3, "transferred text chunk %d", info_ptr->num_text); + } + return(0); +} +#endif + +#ifdef PNG_tIME_SUPPORTED +void PNGAPI +png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time) +{ + png_debug1(1, "in %s storage function", "tIME"); + + if (png_ptr == NULL || info_ptr == NULL || + (png_ptr->mode & PNG_WROTE_tIME)) + return; + + if (mod_time->month == 0 || mod_time->month > 12 || + mod_time->day == 0 || mod_time->day > 31 || + mod_time->hour > 23 || mod_time->minute > 59 || + mod_time->second > 60) + { + png_warning(png_ptr, "Ignoring invalid time value"); + return; + } + + png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); + info_ptr->valid |= PNG_INFO_tIME; +} +#endif + +#ifdef PNG_tRNS_SUPPORTED +void PNGAPI +png_set_tRNS(png_structp png_ptr, png_infop info_ptr, + png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) +{ + png_debug1(1, "in %s storage function", "tRNS"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (trans_alpha != NULL) + { + /* It may not actually be necessary to set png_ptr->trans_alpha here; + * we do it for backward compatibility with the way the png_handle_tRNS + * function used to do the allocation. + */ + + png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); + + /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ + png_ptr->trans_alpha = info_ptr->trans_alpha = + (png_bytep)png_malloc(png_ptr, (png_size_t)PNG_MAX_PALETTE_LENGTH); + + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) + png_memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); + } + + if (trans_color != NULL) + { + int sample_max = (1 << info_ptr->bit_depth); + + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && + (int)trans_color->gray > sample_max) || + (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + ((int)trans_color->red > sample_max || + (int)trans_color->green > sample_max || + (int)trans_color->blue > sample_max))) + png_warning(png_ptr, + "tRNS chunk has out-of-range samples for bit_depth"); + + png_memcpy(&(info_ptr->trans_color), trans_color, + png_sizeof(png_color_16)); + + if (num_trans == 0) + num_trans = 1; + } + + info_ptr->num_trans = (png_uint_16)num_trans; + + if (num_trans != 0) + { + info_ptr->valid |= PNG_INFO_tRNS; + info_ptr->free_me |= PNG_FREE_TRNS; + } +} +#endif + +#ifdef PNG_sPLT_SUPPORTED +void PNGAPI +png_set_sPLT(png_structp png_ptr, + png_infop info_ptr, png_const_sPLT_tp entries, int nentries) +/* + * entries - array of png_sPLT_t structures + * to be added to the list of palettes + * in the info structure. + * + * nentries - number of palette structures to be + * added. + */ +{ + png_sPLT_tp np; + int i; + + if (png_ptr == NULL || info_ptr == NULL) + return; + + np = (png_sPLT_tp)png_malloc_warn(png_ptr, + (info_ptr->splt_palettes_num + nentries) * + (png_size_t)png_sizeof(png_sPLT_t)); + + if (np == NULL) + { + png_warning(png_ptr, "No memory for sPLT palettes"); + return; + } + + png_memcpy(np, info_ptr->splt_palettes, + info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); + + png_free(png_ptr, info_ptr->splt_palettes); + info_ptr->splt_palettes=NULL; + + for (i = 0; i < nentries; i++) + { + png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; + png_const_sPLT_tp from = entries + i; + png_size_t length; + + length = png_strlen(from->name) + 1; + to->name = (png_charp)png_malloc_warn(png_ptr, length); + + if (to->name == NULL) + { + png_warning(png_ptr, + "Out of memory while processing sPLT chunk"); + continue; + } + + png_memcpy(to->name, from->name, length); + to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, + from->nentries * png_sizeof(png_sPLT_entry)); + + if (to->entries == NULL) + { + png_warning(png_ptr, + "Out of memory while processing sPLT chunk"); + png_free(png_ptr, to->name); + to->name = NULL; + continue; + } + + png_memcpy(to->entries, from->entries, + from->nentries * png_sizeof(png_sPLT_entry)); + + to->nentries = from->nentries; + to->depth = from->depth; + } + + info_ptr->splt_palettes = np; + info_ptr->splt_palettes_num += nentries; + info_ptr->valid |= PNG_INFO_sPLT; + info_ptr->free_me |= PNG_FREE_SPLT; +} +#endif /* PNG_sPLT_SUPPORTED */ + +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +void PNGAPI +png_set_unknown_chunks(png_structp png_ptr, + png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) +{ + png_unknown_chunkp np; + int i; + + if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) + return; + + np = (png_unknown_chunkp)png_malloc_warn(png_ptr, + (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) * + png_sizeof(png_unknown_chunk)); + + if (np == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk"); + return; + } + + png_memcpy(np, info_ptr->unknown_chunks, + (png_size_t)info_ptr->unknown_chunks_num * + png_sizeof(png_unknown_chunk)); + + png_free(png_ptr, info_ptr->unknown_chunks); + info_ptr->unknown_chunks = NULL; + + for (i = 0; i < num_unknowns; i++) + { + png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; + png_const_unknown_chunkp from = unknowns + i; + + png_memcpy(to->name, from->name, png_sizeof(from->name)); + to->name[png_sizeof(to->name)-1] = '\0'; + to->size = from->size; + + /* Note our location in the read or write sequence */ + to->location = (png_byte)(png_ptr->mode & 0xff); + + if (from->size == 0) + to->data=NULL; + + else + { + to->data = (png_bytep)png_malloc_warn(png_ptr, + (png_size_t)from->size); + + if (to->data == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk"); + to->size = 0; + } + + else + png_memcpy(to->data, from->data, from->size); + } + } + + info_ptr->unknown_chunks = np; + info_ptr->unknown_chunks_num += num_unknowns; + info_ptr->free_me |= PNG_FREE_UNKN; +} + +void PNGAPI +png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, + int chunk, int location) +{ + if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < + info_ptr->unknown_chunks_num) + info_ptr->unknown_chunks[chunk].location = (png_byte)location; +} +#endif + + +#ifdef PNG_MNG_FEATURES_SUPPORTED +png_uint_32 PNGAPI +png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) +{ + png_debug(1, "in png_permit_mng_features"); + + if (png_ptr == NULL) + return (png_uint_32)0; + + png_ptr->mng_features_permitted = + (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + + return (png_uint_32)png_ptr->mng_features_permitted; +} +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +void PNGAPI +png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_const_bytep + chunk_list, int num_chunks) +{ + png_bytep new_list, p; + int i, old_num_chunks; + if (png_ptr == NULL) + return; + + if (num_chunks == 0) + { + if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) + png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + + else + png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + + if (keep == PNG_HANDLE_CHUNK_ALWAYS) + png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; + + else + png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + + return; + } + + if (chunk_list == NULL) + return; + + old_num_chunks = png_ptr->num_chunk_list; + new_list=(png_bytep)png_malloc(png_ptr, + (png_size_t)(5*(num_chunks + old_num_chunks))); + + if (png_ptr->chunk_list != NULL) + { + png_memcpy(new_list, png_ptr->chunk_list, + (png_size_t)(5*old_num_chunks)); + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list=NULL; + } + + png_memcpy(new_list + 5*old_num_chunks, chunk_list, + (png_size_t)(5*num_chunks)); + + for (p = new_list + 5*old_num_chunks + 4, i = 0; inum_chunk_list = old_num_chunks + num_chunks; + png_ptr->chunk_list = new_list; + png_ptr->free_me |= PNG_FREE_LIST; +} +#endif + +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED +void PNGAPI +png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, + png_user_chunk_ptr read_user_chunk_fn) +{ + png_debug(1, "in png_set_read_user_chunk_fn"); + + if (png_ptr == NULL) + return; + + png_ptr->read_user_chunk_fn = read_user_chunk_fn; + png_ptr->user_chunk_ptr = user_chunk_ptr; +} +#endif + +#ifdef PNG_INFO_IMAGE_SUPPORTED +void PNGAPI +png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) +{ + png_debug1(1, "in %s storage function", "rows"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) + png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); + + info_ptr->row_pointers = row_pointers; + + if (row_pointers) + info_ptr->valid |= PNG_INFO_IDAT; +} +#endif + +void PNGAPI +png_set_compression_buffer_size(png_structp png_ptr, png_size_t size) +{ + if (png_ptr == NULL) + return; + + png_free(png_ptr, png_ptr->zbuf); + + if (size > ZLIB_IO_MAX) + { + png_warning(png_ptr, "Attempt to set buffer size beyond max ignored"); + png_ptr->zbuf_size = ZLIB_IO_MAX; + size = ZLIB_IO_MAX; /* must fit */ + } + + else + png_ptr->zbuf_size = (uInt)size; + + png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + + /* The following ensures a relatively safe failure if this gets called while + * the buffer is actually in use. + */ + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.avail_in = 0; +} + +void PNGAPI +png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) +{ + if (png_ptr && info_ptr) + info_ptr->valid &= ~mask; +} + + + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +/* This function was added to libpng 1.2.6 */ +void PNGAPI +png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, + png_uint_32 user_height_max) +{ + /* Images with dimensions larger than these limits will be + * rejected by png_set_IHDR(). To accept any PNG datastream + * regardless of dimensions, set both limits to 0x7ffffffL. + */ + if (png_ptr == NULL) + return; + + png_ptr->user_width_max = user_width_max; + png_ptr->user_height_max = user_height_max; +} + +/* This function was added to libpng 1.4.0 */ +void PNGAPI +png_set_chunk_cache_max (png_structp png_ptr, + png_uint_32 user_chunk_cache_max) +{ + if (png_ptr) + png_ptr->user_chunk_cache_max = user_chunk_cache_max; +} + +/* This function was added to libpng 1.4.1 */ +void PNGAPI +png_set_chunk_malloc_max (png_structp png_ptr, + png_alloc_size_t user_chunk_malloc_max) +{ + if (png_ptr) + png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; +} +#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ + + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +void PNGAPI +png_set_benign_errors(png_structp png_ptr, int allowed) +{ + png_debug(1, "in png_set_benign_errors"); + + if (allowed) + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + + else + png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; +} +#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/ExternalLibs/glpng/png/pngstruct.h b/ExternalLibs/glpng/png/pngstruct.h new file mode 100644 index 0000000..4466b04 --- /dev/null +++ b/ExternalLibs/glpng/png/pngstruct.h @@ -0,0 +1,360 @@ + +/* pngstruct.h - header file for PNG reference library + * + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * Last changed in libpng 1.5.5 [September 22, 2011] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* The structure that holds the information to read and write PNG files. + * The only people who need to care about what is inside of this are the + * people who will be modifying the library for their own special needs. + * It should NOT be accessed directly by an application. + */ + +#ifndef PNGSTRUCT_H +#define PNGSTRUCT_H +/* zlib.h defines the structure z_stream, an instance of which is included + * in this structure and is required for decompressing the LZ compressed + * data in PNG files. + */ +#include "zlib.h" + +struct png_struct_def +{ +#ifdef PNG_SETJMP_SUPPORTED + jmp_buf longjmp_buffer; /* used in png_error */ + png_longjmp_ptr longjmp_fn;/* setjmp non-local goto function. */ +#endif + png_error_ptr error_fn; /* function for printing errors and aborting */ +#ifdef PNG_WARNINGS_SUPPORTED + png_error_ptr warning_fn; /* function for printing warnings */ +#endif + png_voidp error_ptr; /* user supplied struct for error functions */ + png_rw_ptr write_data_fn; /* function for writing output data */ + png_rw_ptr read_data_fn; /* function for reading input data */ + png_voidp io_ptr; /* ptr to application struct for I/O functions */ + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr read_user_transform_fn; /* user read transform */ +#endif + +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr write_user_transform_fn; /* user write transform */ +#endif + +/* These were added in libpng-1.0.2 */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) + png_voidp user_transform_ptr; /* user supplied struct for user transform */ + png_byte user_transform_depth; /* bit depth of user transformed pixels */ + png_byte user_transform_channels; /* channels in user transformed pixels */ +#endif +#endif + + png_uint_32 mode; /* tells us where we are in the PNG file */ + png_uint_32 flags; /* flags indicating various things to libpng */ + png_uint_32 transformations; /* which transformations to perform */ + + z_stream zstream; /* pointer to decompression structure (below) */ + png_bytep zbuf; /* buffer for zlib */ + uInt zbuf_size; /* size of zbuf (typically 65536) */ +#ifdef PNG_WRITE_SUPPORTED + +/* Added in 1.5.4: state to keep track of whether the zstream has been + * initialized and if so whether it is for IDAT or some other chunk. + */ +#define PNG_ZLIB_UNINITIALIZED 0 +#define PNG_ZLIB_FOR_IDAT 1 +#define PNG_ZLIB_FOR_TEXT 2 /* anything other than IDAT */ +#define PNG_ZLIB_USE_MASK 3 /* bottom two bits */ +#define PNG_ZLIB_IN_USE 4 /* a flag value */ + + png_uint_32 zlib_state; /* State of zlib initialization */ +/* End of material added at libpng 1.5.4 */ + + int zlib_level; /* holds zlib compression level */ + int zlib_method; /* holds zlib compression method */ + int zlib_window_bits; /* holds zlib compression window bits */ + int zlib_mem_level; /* holds zlib compression memory level */ + int zlib_strategy; /* holds zlib compression strategy */ +#endif +/* Added at libpng 1.5.4 */ +#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \ + defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED) + int zlib_text_level; /* holds zlib compression level */ + int zlib_text_method; /* holds zlib compression method */ + int zlib_text_window_bits; /* holds zlib compression window bits */ + int zlib_text_mem_level; /* holds zlib compression memory level */ + int zlib_text_strategy; /* holds zlib compression strategy */ +#endif +/* End of material added at libpng 1.5.4 */ + + png_uint_32 width; /* width of image in pixels */ + png_uint_32 height; /* height of image in pixels */ + png_uint_32 num_rows; /* number of rows in current pass */ + png_uint_32 usr_width; /* width of row at start of write */ + png_size_t rowbytes; /* size of row in bytes */ + png_uint_32 iwidth; /* width of current interlaced row in pixels */ + png_uint_32 row_number; /* current row in interlace pass */ + png_uint_32 chunk_name; /* PNG_CHUNK() id of current chunk */ + png_bytep prev_row; /* buffer to save previous (unfiltered) row. + * This is a pointer into big_prev_row + */ + png_bytep row_buf; /* buffer to save current (unfiltered) row. + * This is a pointer into big_row_buf + */ + png_bytep sub_row; /* buffer to save "sub" row when filtering */ + png_bytep up_row; /* buffer to save "up" row when filtering */ + png_bytep avg_row; /* buffer to save "avg" row when filtering */ + png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ + png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */ + + png_uint_32 idat_size; /* current IDAT size for read */ + png_uint_32 crc; /* current chunk CRC value */ + png_colorp palette; /* palette from the input file */ + png_uint_16 num_palette; /* number of color entries in palette */ + png_uint_16 num_trans; /* number of transparency values */ + png_byte compression; /* file compression type (always 0) */ + png_byte filter; /* file filter type (always 0) */ + png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + png_byte pass; /* current interlace pass (0 - 6) */ + png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ + png_byte color_type; /* color type of file */ + png_byte bit_depth; /* bit depth of file */ + png_byte usr_bit_depth; /* bit depth of users row: write only */ + png_byte pixel_depth; /* number of bits per pixel */ + png_byte channels; /* number of channels in file */ + png_byte usr_channels; /* channels at start of write: write only */ + png_byte sig_bytes; /* magic bytes read/written from start of file */ + png_byte maximum_pixel_depth; + /* pixel depth used for the row buffers */ + png_byte transformed_pixel_depth; + /* pixel depth after read/write transforms */ + png_byte io_chunk_string[5]; + /* string name of chunk */ + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) + png_uint_16 filler; /* filler bytes for pixel expansion */ +#endif + +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) + png_byte background_gamma_type; + png_fixed_point background_gamma; + png_color_16 background; /* background color in screen gamma space */ +#ifdef PNG_READ_GAMMA_SUPPORTED + png_color_16 background_1; /* background normalized to gamma 1.0 */ +#endif +#endif /* PNG_bKGD_SUPPORTED */ + +#ifdef PNG_WRITE_FLUSH_SUPPORTED + png_flush_ptr output_flush_fn; /* Function for flushing output */ + png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ + png_uint_32 flush_rows; /* number of rows written since last flush */ +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED + int gamma_shift; /* number of "insignificant" bits in 16-bit gamma */ + png_fixed_point gamma; /* file gamma value */ + png_fixed_point screen_gamma; /* screen gamma value (display_exponent) */ + + png_bytep gamma_table; /* gamma table for 8-bit depth files */ + png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ +#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \ + defined(PNG_READ_ALPHA_MODE_SUPPORTED) || \ + defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) + png_bytep gamma_from_1; /* converts from 1.0 to screen */ + png_bytep gamma_to_1; /* converts from file to 1.0 */ + png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ + png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ +#endif /* READ_BACKGROUND || READ_ALPHA_MODE || RGB_TO_GRAY */ +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) + png_color_8 sig_bit; /* significant bits in each available channel */ +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) + png_color_8 shift; /* shift for significant bit tranformation */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ + || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + png_bytep trans_alpha; /* alpha values for paletted files */ + png_color_16 trans_color; /* transparent color for non-paletted files */ +#endif + + png_read_status_ptr read_row_fn; /* called after each row is decoded */ + png_write_status_ptr write_row_fn; /* called after each row is encoded */ +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + png_progressive_info_ptr info_fn; /* called after header data fully read */ + png_progressive_row_ptr row_fn; /* called after a prog. row is decoded */ + png_progressive_end_ptr end_fn; /* called after image is complete */ + png_bytep save_buffer_ptr; /* current location in save_buffer */ + png_bytep save_buffer; /* buffer for previously read data */ + png_bytep current_buffer_ptr; /* current location in current_buffer */ + png_bytep current_buffer; /* buffer for recently used data */ + png_uint_32 push_length; /* size of current input chunk */ + png_uint_32 skip_length; /* bytes to skip in input data */ + png_size_t save_buffer_size; /* amount of data now in save_buffer */ + png_size_t save_buffer_max; /* total size of save_buffer */ + png_size_t buffer_size; /* total amount of available input data */ + png_size_t current_buffer_size; /* amount of data now in current_buffer */ + int process_mode; /* what push library is currently doing */ + int cur_palette; /* current push library palette index */ + +# ifdef PNG_TEXT_SUPPORTED + png_size_t current_text_size; /* current size of text input data */ + png_size_t current_text_left; /* how much text left to read in input */ + png_charp current_text; /* current text chunk buffer */ + png_charp current_text_ptr; /* current location in current_text */ +# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */ + +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) +/* For the Borland special 64K segment handler */ + png_bytepp offset_table_ptr; + png_bytep offset_table; + png_uint_16 offset_table_number; + png_uint_16 offset_table_count; + png_uint_16 offset_table_count_free; +#endif + +#ifdef PNG_READ_QUANTIZE_SUPPORTED + png_bytep palette_lookup; /* lookup table for quantizing */ + png_bytep quantize_index; /* index translation for palette files */ +#endif + +#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) + png_uint_16p hist; /* histogram */ +#endif + +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED + png_byte heuristic_method; /* heuristic for row filter selection */ + png_byte num_prev_filters; /* number of weights for previous rows */ + png_bytep prev_filters; /* filter type(s) of previous row(s) */ + png_uint_16p filter_weights; /* weight(s) for previous line(s) */ + png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ + png_uint_16p filter_costs; /* relative filter calculation cost */ + png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ +#endif + +#ifdef PNG_TIME_RFC1123_SUPPORTED + char time_buffer[29]; /* String to hold RFC 1123 time text */ +#endif + +/* New members added in libpng-1.0.6 */ + + png_uint_32 free_me; /* flags items libpng is responsible for freeing */ + +#ifdef PNG_USER_CHUNKS_SUPPORTED + png_voidp user_chunk_ptr; + png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int num_chunk_list; + png_bytep chunk_list; +#endif + +#ifdef PNG_READ_sRGB_SUPPORTED + /* Added in 1.5.5 to record an sRGB chunk in the png. */ + png_byte is_sRGB; +#endif + +/* New members added in libpng-1.0.3 */ +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + png_byte rgb_to_gray_status; + /* Added in libpng 1.5.5 to record setting of coefficients: */ + png_byte rgb_to_gray_coefficients_set; + /* These were changed from png_byte in libpng-1.0.6 */ + png_uint_16 rgb_to_gray_red_coeff; + png_uint_16 rgb_to_gray_green_coeff; + /* deleted in 1.5.5: rgb_to_gray_blue_coeff; */ +#endif + +/* New member added in libpng-1.0.4 (renamed in 1.0.9) */ +#if defined(PNG_MNG_FEATURES_SUPPORTED) || \ + defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) +/* Changed from png_byte to png_uint_32 at version 1.2.0 */ + png_uint_32 mng_features_permitted; +#endif + +/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ +#ifdef PNG_MNG_FEATURES_SUPPORTED + png_byte filter_type; +#endif + +/* New members added in libpng-1.2.0 */ + +/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ +#ifdef PNG_USER_MEM_SUPPORTED + png_voidp mem_ptr; /* user supplied struct for mem functions */ + png_malloc_ptr malloc_fn; /* function for allocating memory */ + png_free_ptr free_fn; /* function for freeing memory */ +#endif + +/* New member added in libpng-1.0.13 and 1.2.0 */ + png_bytep big_row_buf; /* buffer to save current (unfiltered) row */ + +#ifdef PNG_READ_QUANTIZE_SUPPORTED +/* The following three members were added at version 1.0.14 and 1.2.4 */ + png_bytep quantize_sort; /* working sort array */ + png_bytep index_to_palette; /* where the original index currently is + in the palette */ + png_bytep palette_to_index; /* which original index points to this + palette color */ +#endif + +/* New members added in libpng-1.0.16 and 1.2.6 */ + png_byte compression_type; + +#ifdef PNG_USER_LIMITS_SUPPORTED + png_uint_32 user_width_max; + png_uint_32 user_height_max; + + /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown + * chunks that can be stored (0 means unlimited). + */ + png_uint_32 user_chunk_cache_max; + + /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk + * can occupy when decompressed. 0 means unlimited. + */ + png_alloc_size_t user_chunk_malloc_max; +#endif + +/* New member added in libpng-1.0.25 and 1.2.17 */ +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + /* Storage for unknown chunk that the library doesn't recognize. */ + png_unknown_chunk unknown_chunk; +#endif + +/* New member added in libpng-1.2.26 */ + png_size_t old_big_row_buf_size; + +/* New member added in libpng-1.2.30 */ + png_charp chunkdata; /* buffer for reading chunk data */ + +#ifdef PNG_IO_STATE_SUPPORTED +/* New member added in libpng-1.4.0 */ + png_uint_32 io_state; +#endif + +/* New member added in libpng-1.5.6 */ + png_bytep big_prev_row; + + void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info, + png_bytep row, png_const_bytep prev_row); +}; +#endif /* PNGSTRUCT_H */ diff --git a/ExternalLibs/glpng/png/pngtrans.c b/ExternalLibs/glpng/png/pngtrans.c index 8a2e712..53d9a25 100644 --- a/ExternalLibs/glpng/png/pngtrans.c +++ b/ExternalLibs/glpng/png/pngtrans.c @@ -1,555 +1,678 @@ - -/* pngtrans.c - transforms the data in a row (used by both readers and writers) - * - * libpng 1.0.2 - June 14, 1998 - * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. - * Copyright (c) 1996, 1997 Andreas Dilger - * Copyright (c) 1998, Glenn Randers-Pehrson - */ - -#define PNG_INTERNAL -#include "png.h" - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* turn on bgr to rgb mapping */ -void -png_set_bgr(png_structp png_ptr) -{ - png_debug(1, "in png_set_bgr\n"); - png_ptr->transformations |= PNG_BGR; -} -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* turn on 16 bit byte swapping */ -void -png_set_swap(png_structp png_ptr) -{ - png_debug(1, "in png_set_swap\n"); - if (png_ptr->bit_depth == 16) - png_ptr->transformations |= PNG_SWAP_BYTES; -} -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) -/* turn on pixel packing */ -void -png_set_packing(png_structp png_ptr) -{ - png_debug(1, "in png_set_packing\n"); - if (png_ptr->bit_depth < 8) - { - png_ptr->transformations |= PNG_PACK; - png_ptr->usr_bit_depth = 8; - } -} -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) -/* turn on packed pixel swapping */ -void -png_set_packswap(png_structp png_ptr) -{ - png_debug(1, "in png_set_packswap\n"); - if (png_ptr->bit_depth < 8) - png_ptr->transformations |= PNG_PACKSWAP; -} -#endif - -#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) -void -png_set_shift(png_structp png_ptr, png_color_8p true_bits) -{ - png_debug(1, "in png_set_shift\n"); - png_ptr->transformations |= PNG_SHIFT; - png_ptr->shift = *true_bits; -} -#endif - -#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ - defined(PNG_WRITE_INTERLACING_SUPPORTED) -int -png_set_interlace_handling(png_structp png_ptr) -{ - png_debug(1, "in png_set_interlace handling\n"); - if (png_ptr->interlaced) - { - png_ptr->transformations |= PNG_INTERLACE; - return (7); - } - - return (1); -} -#endif - -#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte on read, or remove a filler or alpha byte on write. - * The filler type has changed in v0.95 to allow future 2-byte fillers - * for 48-bit input data, as well as to avoid problems with some compilers - * that don't like bytes as parameters. - */ -void -png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) -{ - png_debug(1, "in png_set_filler\n"); - png_ptr->transformations |= PNG_FILLER; - png_ptr->filler = (png_byte)filler; - if (filler_loc == PNG_FILLER_AFTER) - png_ptr->flags |= PNG_FLAG_FILLER_AFTER; - else - png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER; -} -#endif - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -void -png_set_swap_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_swap_alpha\n"); - png_ptr->transformations |= PNG_SWAP_ALPHA; -} -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ - defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -void -png_set_invert_alpha(png_structp png_ptr) -{ - png_debug(1, "in png_set_invert_alpha\n"); - png_ptr->transformations |= PNG_INVERT_ALPHA; -} -#endif - -#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) -void -png_set_invert_mono(png_structp png_ptr) -{ - png_debug(1, "in png_set_invert_mono\n"); - png_ptr->transformations |= PNG_INVERT_MONO; -} - -/* invert monochrome grayscale data */ -void -png_do_invert(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_invert\n"); - if (row_info->bit_depth == 1 && -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->color_type == PNG_COLOR_TYPE_GRAY) - { - png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop = row_info->rowbytes; - - for (i = 0; i < istop; i++) - { - *rp = (png_byte)(~(*rp)); - rp++; - } - } -} -#endif - -#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) -/* swaps byte order on 16 bit depth images */ -void -png_do_swap(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_swap\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->bit_depth == 16) - { - png_bytep rp = row; - png_uint_32 i; - png_uint_32 istop= row_info->width * row_info->channels; - - for (i = 0; i < istop; i++, rp += 2) - { - png_byte t = *rp; - *rp = *(rp + 1); - *(rp + 1) = t; - } - } -} -#endif - -#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) -static png_byte onebppswaptable[256] = { - 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, - 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, - 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, - 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, - 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, - 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, - 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, - 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, - 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, - 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, - 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, - 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, - 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, - 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, - 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, - 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, - 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, - 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, - 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, - 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, - 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, - 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, - 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, - 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, - 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, - 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, - 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, - 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, - 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, - 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, - 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, - 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF -}; - -static png_byte twobppswaptable[256] = { - 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0, - 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0, - 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4, - 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4, - 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8, - 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8, - 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC, - 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC, - 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1, - 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1, - 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5, - 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5, - 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9, - 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9, - 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD, - 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD, - 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2, - 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2, - 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6, - 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6, - 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA, - 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA, - 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE, - 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE, - 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3, - 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3, - 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7, - 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7, - 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB, - 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB, - 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF, - 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF -}; - -static png_byte fourbppswaptable[256] = { - 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, - 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0, - 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71, - 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1, - 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72, - 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2, - 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73, - 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3, - 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74, - 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4, - 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75, - 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5, - 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76, - 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6, - 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77, - 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7, - 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78, - 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8, - 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79, - 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9, - 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A, - 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA, - 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B, - 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB, - 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C, - 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC, - 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D, - 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD, - 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E, - 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE, - 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F, - 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF -}; - -/* swaps pixel packing order within bytes */ -void -png_do_packswap(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_packswap\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - row_info->bit_depth < 8) - { - png_bytep rp, end, table; - - end = row + row_info->rowbytes; - - if (row_info->bit_depth == 1) - table = onebppswaptable; - else if (row_info->bit_depth == 2) - table = twobppswaptable; - else if (row_info->bit_depth == 4) - table = fourbppswaptable; - else - return; - - for (rp = row; rp < end; rp++) - *rp = table[*rp]; - } -} -#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */ - -#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ - defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -/* remove filler or alpha byte(s) */ -void -png_do_strip_filler(png_row_infop row_info, png_bytep row, png_uint_32 flags) -{ - png_debug(1, "in png_do_strip_filler\n"); -#if defined(PNG_USELESS_TESTS_SUPPORTED) - if (row != NULL && row_info != NULL) -#endif - { -/* - if (row_info->color_type == PNG_COLOR_TYPE_RGB || - row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) -*/ - png_bytep sp=row; - png_bytep dp=row; - png_uint_32 row_width=row_info->width; - png_uint_32 i; - - if (row_info->channels == 4) - { - if (row_info->bit_depth == 8) - { - /* This converts from RGBX or RGBA to RGB */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - dp+=3; sp+=4; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp++; - } - } - /* This converts from XRGB or ARGB to RGB */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 24; - row_info->rowbytes = row_width * 3; - } - else /* if (row_info->bit_depth == 16) */ - { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from RRGGBBXX or RRGGBBAA to RRGGBB */ - sp += 8; dp += 6; - for (i = 1; i < row_width; i++) - { - /* This could be (although memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXRRGGBB or AARRGGBB to RRGGBB */ - for (i = 0; i < row_width; i++) - { - /* This could be (although memcpy is probably slower): - png_memcpy(dp, sp, 6); - sp += 8; - dp += 6; - */ - sp+=2; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 48; - row_info->rowbytes = row_width * 6; - } - row_info->channels = 3; - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - } -/* - else if (row_info->color_type == PNG_COLOR_TYPE_GRAY || - row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) -*/ - else if (row_info->channels == 2) - { - if (row_info->bit_depth == 8) - { - /* This converts from GX or GA to G */ - if (flags & PNG_FLAG_FILLER_AFTER) - { - for (i = 0; i < row_width; i++) - { - *dp++ = *sp++; - sp++; - } - } - /* This converts from XG or AG to G */ - else - { - for (i = 0; i < row_width; i++) - { - sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 8; - row_info->rowbytes = row_width; - } - else /* if (row_info->bit_depth == 16) */ - { - if (flags & PNG_FLAG_FILLER_AFTER) - { - /* This converts from GGXX or GGAA to GG */ - sp += 4; dp += 2; - for (i = 1; i < row_width; i++) - { - *dp++ = *sp++; - *dp++ = *sp++; - sp += 2; - } - } - else - { - /* This converts from XXGG or AAGG to GG */ - for (i = 0; i < row_width; i++) - { - sp += 2; - *dp++ = *sp++; - *dp++ = *sp++; - } - } - row_info->pixel_depth = 16; - row_info->rowbytes = row_width * 2; - } - row_info->channels = 1; - row_info->color_type &= ~PNG_COLOR_MASK_ALPHA; - } - } -} -#endif - -#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) -/* swaps red and blue bytes within a pixel */ -void -png_do_bgr(png_row_infop row_info, png_bytep row) -{ - png_debug(1, "in png_do_bgr\n"); - if ( -#if defined(PNG_USELESS_TESTS_SUPPORTED) - row != NULL && row_info != NULL && -#endif - (row_info->color_type & PNG_COLOR_MASK_COLOR)) - { - png_uint_32 row_width = row_info->width; - if (row_info->bit_depth == 8) - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 3) - { - png_byte save = *rp; - *rp = *(rp + 2); - *(rp + 2) = save; - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 4) - { - png_byte save = *rp; - *rp = *(rp + 2); - *(rp + 2) = save; - } - } - } - else if (row_info->bit_depth == 16) - { - if (row_info->color_type == PNG_COLOR_TYPE_RGB) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 6) - { - png_byte save = *rp; - *rp = *(rp + 4); - *(rp + 4) = save; - save = *(rp + 1); - *(rp + 1) = *(rp + 5); - *(rp + 5) = save; - } - } - else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) - { - png_bytep rp; - png_uint_32 i; - - for (i = 0, rp = row; i < row_width; i++, rp += 8) - { - png_byte save = *rp; - *rp = *(rp + 4); - *(rp + 4) = save; - save = *(rp + 1); - *(rp + 1) = *(rp + 5); - *(rp + 5) = save; - } - } - } - } -} -#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */ - - + +/* pngtrans.c - transforms the data in a row (used by both readers and writers) + * + * Last changed in libpng 1.5.4 [July 7, 2011] + * Copyright (c) 1998-2011 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "pngpriv.h" + +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +/* Turn on BGR-to-RGB mapping */ +void PNGAPI +png_set_bgr(png_structp png_ptr) +{ + png_debug(1, "in png_set_bgr"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_BGR; +} +#endif + +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +/* Turn on 16 bit byte swapping */ +void PNGAPI +png_set_swap(png_structp png_ptr) +{ + png_debug(1, "in png_set_swap"); + + if (png_ptr == NULL) + return; + + if (png_ptr->bit_depth == 16) + png_ptr->transformations |= PNG_SWAP_BYTES; +} +#endif + +#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) +/* Turn on pixel packing */ +void PNGAPI +png_set_packing(png_structp png_ptr) +{ + png_debug(1, "in png_set_packing"); + + if (png_ptr == NULL) + return; + + if (png_ptr->bit_depth < 8) + { + png_ptr->transformations |= PNG_PACK; + png_ptr->usr_bit_depth = 8; + } +} +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) +/* Turn on packed pixel swapping */ +void PNGAPI +png_set_packswap(png_structp png_ptr) +{ + png_debug(1, "in png_set_packswap"); + + if (png_ptr == NULL) + return; + + if (png_ptr->bit_depth < 8) + png_ptr->transformations |= PNG_PACKSWAP; +} +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) +void PNGAPI +png_set_shift(png_structp png_ptr, png_const_color_8p true_bits) +{ + png_debug(1, "in png_set_shift"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_SHIFT; + png_ptr->shift = *true_bits; +} +#endif + +#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ + defined(PNG_WRITE_INTERLACING_SUPPORTED) +int PNGAPI +png_set_interlace_handling(png_structp png_ptr) +{ + png_debug(1, "in png_set_interlace handling"); + + if (png_ptr && png_ptr->interlaced) + { + png_ptr->transformations |= PNG_INTERLACE; + return (7); + } + + return (1); +} +#endif + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) +/* Add a filler byte on read, or remove a filler or alpha byte on write. + * The filler type has changed in v0.95 to allow future 2-byte fillers + * for 48-bit input data, as well as to avoid problems with some compilers + * that don't like bytes as parameters. + */ +void PNGAPI +png_set_filler(png_structp png_ptr, png_uint_32 filler, int filler_loc) +{ + png_debug(1, "in png_set_filler"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_FILLER; + png_ptr->filler = (png_uint_16)filler; + + if (filler_loc == PNG_FILLER_AFTER) + png_ptr->flags |= PNG_FLAG_FILLER_AFTER; + + else + png_ptr->flags &= ~PNG_FLAG_FILLER_AFTER; + + /* This should probably go in the "do_read_filler" routine. + * I attempted to do that in libpng-1.0.1a but that caused problems + * so I restored it in libpng-1.0.2a + */ + + if (png_ptr->color_type == PNG_COLOR_TYPE_RGB) + { + png_ptr->usr_channels = 4; + } + + /* Also I added this in libpng-1.0.2a (what happens when we expand + * a less-than-8-bit grayscale to GA?) */ + + if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY && png_ptr->bit_depth >= 8) + { + png_ptr->usr_channels = 2; + } +} + +/* Added to libpng-1.2.7 */ +void PNGAPI +png_set_add_alpha(png_structp png_ptr, png_uint_32 filler, int filler_loc) +{ + png_debug(1, "in png_set_add_alpha"); + + if (png_ptr == NULL) + return; + + png_set_filler(png_ptr, filler, filler_loc); + png_ptr->transformations |= PNG_ADD_ALPHA; +} + +#endif + +#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) +void PNGAPI +png_set_swap_alpha(png_structp png_ptr) +{ + png_debug(1, "in png_set_swap_alpha"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_SWAP_ALPHA; +} +#endif + +#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) +void PNGAPI +png_set_invert_alpha(png_structp png_ptr) +{ + png_debug(1, "in png_set_invert_alpha"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_INVERT_ALPHA; +} +#endif + +#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) +void PNGAPI +png_set_invert_mono(png_structp png_ptr) +{ + png_debug(1, "in png_set_invert_mono"); + + if (png_ptr == NULL) + return; + + png_ptr->transformations |= PNG_INVERT_MONO; +} + +/* Invert monochrome grayscale data */ +void /* PRIVATE */ +png_do_invert(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_invert"); + + /* This test removed from libpng version 1.0.13 and 1.2.0: + * if (row_info->bit_depth == 1 && + */ + if (row_info->color_type == PNG_COLOR_TYPE_GRAY) + { + png_bytep rp = row; + png_size_t i; + png_size_t istop = row_info->rowbytes; + + for (i = 0; i < istop; i++) + { + *rp = (png_byte)(~(*rp)); + rp++; + } + } + + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && + row_info->bit_depth == 8) + { + png_bytep rp = row; + png_size_t i; + png_size_t istop = row_info->rowbytes; + + for (i = 0; i < istop; i += 2) + { + *rp = (png_byte)(~(*rp)); + rp += 2; + } + } + +#ifdef PNG_16BIT_SUPPORTED + else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && + row_info->bit_depth == 16) + { + png_bytep rp = row; + png_size_t i; + png_size_t istop = row_info->rowbytes; + + for (i = 0; i < istop; i += 4) + { + *rp = (png_byte)(~(*rp)); + *(rp + 1) = (png_byte)(~(*(rp + 1))); + rp += 4; + } + } +#endif +} +#endif + +#ifdef PNG_16BIT_SUPPORTED +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +/* Swaps byte order on 16 bit depth images */ +void /* PRIVATE */ +png_do_swap(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_swap"); + + if (row_info->bit_depth == 16) + { + png_bytep rp = row; + png_uint_32 i; + png_uint_32 istop= row_info->width * row_info->channels; + + for (i = 0; i < istop; i++, rp += 2) + { + png_byte t = *rp; + *rp = *(rp + 1); + *(rp + 1) = t; + } + } +} +#endif +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED)||defined(PNG_WRITE_PACKSWAP_SUPPORTED) +static PNG_CONST png_byte onebppswaptable[256] = { + 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, + 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, + 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, + 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, + 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, + 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, + 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, + 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, + 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, + 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, + 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, + 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, + 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, + 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, + 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, + 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, + 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, + 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, + 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, + 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, + 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, + 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, + 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, + 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, + 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, + 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, + 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, + 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, + 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, + 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, + 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, + 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF +}; + +static PNG_CONST png_byte twobppswaptable[256] = { + 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0, + 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0, + 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4, + 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4, + 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8, + 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8, + 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC, + 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC, + 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1, + 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1, + 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5, + 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5, + 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9, + 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9, + 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD, + 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD, + 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2, + 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2, + 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6, + 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6, + 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA, + 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA, + 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE, + 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE, + 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3, + 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3, + 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7, + 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7, + 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB, + 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB, + 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF, + 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF +}; + +static PNG_CONST png_byte fourbppswaptable[256] = { + 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, + 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0, + 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71, + 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1, + 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72, + 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2, + 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73, + 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3, + 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74, + 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4, + 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75, + 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5, + 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76, + 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6, + 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77, + 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7, + 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78, + 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8, + 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79, + 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9, + 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A, + 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA, + 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B, + 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB, + 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C, + 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC, + 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D, + 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD, + 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E, + 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE, + 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F, + 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF +}; + +/* Swaps pixel packing order within bytes */ +void /* PRIVATE */ +png_do_packswap(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_packswap"); + + if (row_info->bit_depth < 8) + { + png_bytep rp; + png_const_bytep end, table; + + end = row + row_info->rowbytes; + + if (row_info->bit_depth == 1) + table = onebppswaptable; + + else if (row_info->bit_depth == 2) + table = twobppswaptable; + + else if (row_info->bit_depth == 4) + table = fourbppswaptable; + + else + return; + + for (rp = row; rp < end; rp++) + *rp = table[*rp]; + } +} +#endif /* PNG_READ_PACKSWAP_SUPPORTED or PNG_WRITE_PACKSWAP_SUPPORTED */ + +#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ + defined(PNG_READ_STRIP_ALPHA_SUPPORTED) +/* Remove a channel - this used to be 'png_do_strip_filler' but it used a + * somewhat weird combination of flags to determine what to do. All the calls + * to png_do_strip_filler are changed in 1.5.2 to call this instead with the + * correct arguments. + * + * The routine isn't general - the channel must be the channel at the start or + * end (not in the middle) of each pixel. + */ +void /* PRIVATE */ +png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start) +{ + png_bytep sp = row; /* source pointer */ + png_bytep dp = row; /* destination pointer */ + png_bytep ep = row + row_info->rowbytes; /* One beyond end of row */ + + /* At the start sp will point to the first byte to copy and dp to where + * it is copied to. ep always points just beyond the end of the row, so + * the loop simply copies (channels-1) channels until sp reaches ep. + * + * at_start: 0 -- convert AG, XG, ARGB, XRGB, AAGG, XXGG, etc. + * nonzero -- convert GA, GX, RGBA, RGBX, GGAA, RRGGBBXX, etc. + */ + + /* GA, GX, XG cases */ + if (row_info->channels == 2) + { + if (row_info->bit_depth == 8) + { + if (at_start) /* Skip initial filler */ + ++sp; + else /* Skip initial channel and, for sp, the filler */ + sp += 2, ++dp; + + /* For a 1 pixel wide image there is nothing to do */ + while (sp < ep) + *dp++ = *sp, sp += 2; + + row_info->pixel_depth = 8; + } + + else if (row_info->bit_depth == 16) + { + if (at_start) /* Skip initial filler */ + sp += 2; + else /* Skip initial channel and, for sp, the filler */ + sp += 4, dp += 2; + + while (sp < ep) + *dp++ = *sp++, *dp++ = *sp, sp += 3; + + row_info->pixel_depth = 16; + } + + else + return; /* bad bit depth */ + + row_info->channels = 1; + + /* Finally fix the color type if it records an alpha channel */ + if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + row_info->color_type = PNG_COLOR_TYPE_GRAY; + } + + /* RGBA, RGBX, XRGB cases */ + else if (row_info->channels == 4) + { + if (row_info->bit_depth == 8) + { + if (at_start) /* Skip initial filler */ + ++sp; + else /* Skip initial channels and, for sp, the filler */ + sp += 4, dp += 3; + + /* Note that the loop adds 3 to dp and 4 to sp each time. */ + while (sp < ep) + *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2; + + row_info->pixel_depth = 24; + } + + else if (row_info->bit_depth == 16) + { + if (at_start) /* Skip initial filler */ + sp += 2; + else /* Skip initial channels and, for sp, the filler */ + sp += 8, dp += 6; + + while (sp < ep) + { + /* Copy 6 bytes, skip 2 */ + *dp++ = *sp++, *dp++ = *sp++; + *dp++ = *sp++, *dp++ = *sp++; + *dp++ = *sp++, *dp++ = *sp, sp += 3; + } + + row_info->pixel_depth = 48; + } + + else + return; /* bad bit depth */ + + row_info->channels = 3; + + /* Finally fix the color type if it records an alpha channel */ + if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + row_info->color_type = PNG_COLOR_TYPE_RGB; + } + + else + return; /* The filler channel has gone already */ + + /* Fix the rowbytes value. */ + row_info->rowbytes = dp-row; +} +#endif + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +/* Swaps red and blue bytes within a pixel */ +void /* PRIVATE */ +png_do_bgr(png_row_infop row_info, png_bytep row) +{ + png_debug(1, "in png_do_bgr"); + + if ((row_info->color_type & PNG_COLOR_MASK_COLOR)) + { + png_uint_32 row_width = row_info->width; + if (row_info->bit_depth == 8) + { + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + { + png_bytep rp; + png_uint_32 i; + + for (i = 0, rp = row; i < row_width; i++, rp += 3) + { + png_byte save = *rp; + *rp = *(rp + 2); + *(rp + 2) = save; + } + } + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + { + png_bytep rp; + png_uint_32 i; + + for (i = 0, rp = row; i < row_width; i++, rp += 4) + { + png_byte save = *rp; + *rp = *(rp + 2); + *(rp + 2) = save; + } + } + } + +#ifdef PNG_16BIT_SUPPORTED + else if (row_info->bit_depth == 16) + { + if (row_info->color_type == PNG_COLOR_TYPE_RGB) + { + png_bytep rp; + png_uint_32 i; + + for (i = 0, rp = row; i < row_width; i++, rp += 6) + { + png_byte save = *rp; + *rp = *(rp + 4); + *(rp + 4) = save; + save = *(rp + 1); + *(rp + 1) = *(rp + 5); + *(rp + 5) = save; + } + } + + else if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) + { + png_bytep rp; + png_uint_32 i; + + for (i = 0, rp = row; i < row_width; i++, rp += 8) + { + png_byte save = *rp; + *rp = *(rp + 4); + *(rp + 4) = save; + save = *(rp + 1); + *(rp + 1) = *(rp + 5); + *(rp + 5) = save; + } + } + } +#endif + } +} +#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */ + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +void PNGAPI +png_set_user_transform_info(png_structp png_ptr, png_voidp + user_transform_ptr, int user_transform_depth, int user_transform_channels) +{ + png_debug(1, "in png_set_user_transform_info"); + + if (png_ptr == NULL) + return; + png_ptr->user_transform_ptr = user_transform_ptr; + png_ptr->user_transform_depth = (png_byte)user_transform_depth; + png_ptr->user_transform_channels = (png_byte)user_transform_channels; +} +#endif + +/* This function returns a pointer to the user_transform_ptr associated with + * the user transform functions. The application should free any memory + * associated with this pointer before png_write_destroy and png_read_destroy + * are called. + */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +png_voidp PNGAPI +png_get_user_transform_ptr(png_const_structp png_ptr) +{ + if (png_ptr == NULL) + return (NULL); + + return ((png_voidp)png_ptr->user_transform_ptr); +} +#endif + +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED +png_uint_32 PNGAPI +png_get_current_row_number(png_const_structp png_ptr) +{ + /* See the comments in png.h - this is the sub-image row when reading and + * interlaced image. + */ + if (png_ptr != NULL) + return png_ptr->row_number; + + return PNG_UINT_32_MAX; /* help the app not to fail silently */ +} + +png_byte PNGAPI +png_get_current_pass_number(png_const_structp png_ptr) +{ + if (png_ptr != NULL) + return png_ptr->pass; + return 8; /* invalid */ +} +#endif /* PNG_USER_TRANSFORM_INFO_SUPPORTED */ +#endif /* PNG_READ_USER_TRANSFORM_SUPPORTED || + PNG_WRITE_USER_TRANSFORM_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ diff --git a/ExternalLibs/glpng/zlib/adler32.c b/ExternalLibs/glpng/zlib/adler32.c index 17fb76e..65ad6a5 100644 --- a/ExternalLibs/glpng/zlib/adler32.c +++ b/ExternalLibs/glpng/zlib/adler32.c @@ -1,12 +1,15 @@ /* adler32.c -- compute the Adler-32 checksum of a data stream - * Copyright (C) 1995-2004 Mark Adler + * Copyright (C) 1995-2007 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ /* @(#) $Id$ */ -#define ZLIB_INTERNAL -#include "zlib.h" +#include "zutil.h" + +#define local static + +local uLong adler32_combine_(uLong adler1, uLong adler2, z_off64_t len2); #define BASE 65521UL /* largest prime smaller than 65536 */ #define NMAX 5552 @@ -125,10 +128,10 @@ uLong ZEXPORT adler32(adler, buf, len) } /* ========================================================================= */ -uLong ZEXPORT adler32_combine(adler1, adler2, len2) +local uLong adler32_combine_(adler1, adler2, len2) uLong adler1; uLong adler2; - z_off_t len2; + z_off64_t len2; { unsigned long sum1; unsigned long sum2; @@ -141,10 +144,26 @@ uLong ZEXPORT adler32_combine(adler1, adler2, len2) MOD(sum2); sum1 += (adler2 & 0xffff) + BASE - 1; sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem; - if (sum1 > BASE) sum1 -= BASE; - if (sum1 > BASE) sum1 -= BASE; - if (sum2 > (BASE << 1)) sum2 -= (BASE << 1); - if (sum2 > BASE) sum2 -= BASE; + if (sum1 >= BASE) sum1 -= BASE; + if (sum1 >= BASE) sum1 -= BASE; + if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1); + if (sum2 >= BASE) sum2 -= BASE; return sum1 | (sum2 << 16); } +/* ========================================================================= */ +uLong ZEXPORT adler32_combine(adler1, adler2, len2) + uLong adler1; + uLong adler2; + z_off_t len2; +{ + return adler32_combine_(adler1, adler2, len2); +} + +uLong ZEXPORT adler32_combine64(adler1, adler2, len2) + uLong adler1; + uLong adler2; + z_off64_t len2; +{ + return adler32_combine_(adler1, adler2, len2); +} diff --git a/ExternalLibs/glpng/zlib/compress.c b/ExternalLibs/glpng/zlib/compress.c index 7936092..ea4dfbe 100644 --- a/ExternalLibs/glpng/zlib/compress.c +++ b/ExternalLibs/glpng/zlib/compress.c @@ -1,5 +1,5 @@ /* compress.c -- compress a memory buffer - * Copyright (C) 1995-2003 Jean-loup Gailly. + * Copyright (C) 1995-2005 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -75,6 +75,6 @@ int ZEXPORT compress (dest, destLen, source, sourceLen) uLong ZEXPORT compressBound (sourceLen) uLong sourceLen; { - return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11; + return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + + (sourceLen >> 25) + 13; } - diff --git a/ExternalLibs/glpng/zlib/crc32.c b/ExternalLibs/glpng/zlib/crc32.c index 9c772cc..91be372 100644 --- a/ExternalLibs/glpng/zlib/crc32.c +++ b/ExternalLibs/glpng/zlib/crc32.c @@ -1,5 +1,5 @@ /* crc32.c -- compute the CRC-32 of a data stream - * Copyright (C) 1995-2005 Mark Adler + * Copyright (C) 1995-2006, 2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h * * Thanks to Rodney Brown for his contribution of faster @@ -53,7 +53,7 @@ /* Definitions for doing the crc four data bytes at a time. */ #ifdef BYFOUR -# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \ +# define REV(w) ((((w)>>24)&0xff)+(((w)>>8)&0xff00)+ \ (((w)&0xff00)<<8)+(((w)&0xff)<<24)) local unsigned long crc32_little OF((unsigned long, const unsigned char FAR *, unsigned)); @@ -68,6 +68,8 @@ local unsigned long gf2_matrix_times OF((unsigned long *mat, unsigned long vec)); local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat)); +local uLong crc32_combine_(uLong crc1, uLong crc2, z_off64_t len2); + #ifdef DYNAMIC_CRC_TABLE @@ -219,7 +221,7 @@ const unsigned long FAR * ZEXPORT get_crc_table() unsigned long ZEXPORT crc32(crc, buf, len) unsigned long crc; const unsigned char FAR *buf; - unsigned len; + uInt len; { if (buf == Z_NULL) return 0UL; @@ -367,22 +369,22 @@ local void gf2_matrix_square(square, mat) } /* ========================================================================= */ -uLong ZEXPORT crc32_combine(crc1, crc2, len2) +local uLong crc32_combine_(crc1, crc2, len2) uLong crc1; uLong crc2; - z_off_t len2; + z_off64_t len2; { int n; unsigned long row; unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */ unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */ - /* degenerate case */ - if (len2 == 0) + /* degenerate case (also disallow negative lengths) */ + if (len2 <= 0) return crc1; /* put operator for one zero bit in odd */ - odd[0] = 0xedb88320L; /* CRC-32 polynomial */ + odd[0] = 0xedb88320UL; /* CRC-32 polynomial */ row = 1; for (n = 1; n < GF2_DIM; n++) { odd[n] = row; @@ -422,3 +424,19 @@ uLong ZEXPORT crc32_combine(crc1, crc2, len2) return crc1; } +/* ========================================================================= */ +uLong ZEXPORT crc32_combine(crc1, crc2, len2) + uLong crc1; + uLong crc2; + z_off_t len2; +{ + return crc32_combine_(crc1, crc2, len2); +} + +uLong ZEXPORT crc32_combine64(crc1, crc2, len2) + uLong crc1; + uLong crc2; + z_off64_t len2; +{ + return crc32_combine_(crc1, crc2, len2); +} diff --git a/ExternalLibs/glpng/zlib/deflate.c b/ExternalLibs/glpng/zlib/deflate.c index 8bcb87a..5c4022f 100644 --- a/ExternalLibs/glpng/zlib/deflate.c +++ b/ExternalLibs/glpng/zlib/deflate.c @@ -1,5 +1,5 @@ /* deflate.c -- compress data using the deflation algorithm - * Copyright (C) 1995-2005 Jean-loup Gailly. + * Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -52,7 +52,7 @@ #include "deflate.h" const char deflate_copyright[] = - " deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly "; + " deflate 1.2.5 Copyright 1995-2010 Jean-loup Gailly and Mark Adler "; /* If you use the zlib library in a product, an acknowledgment is welcome in the documentation of your product. If for some reason you cannot @@ -79,19 +79,18 @@ local block_state deflate_fast OF((deflate_state *s, int flush)); #ifndef FASTEST local block_state deflate_slow OF((deflate_state *s, int flush)); #endif +local block_state deflate_rle OF((deflate_state *s, int flush)); +local block_state deflate_huff OF((deflate_state *s, int flush)); local void lm_init OF((deflate_state *s)); local void putShortMSB OF((deflate_state *s, uInt b)); local void flush_pending OF((z_streamp strm)); local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size)); -#ifndef FASTEST #ifdef ASMV void match_init OF((void)); /* asm code initialization */ uInt longest_match OF((deflate_state *s, IPos cur_match)); #else local uInt longest_match OF((deflate_state *s, IPos cur_match)); #endif -#endif -local uInt longest_match_fast OF((deflate_state *s, IPos cur_match)); #ifdef DEBUG local void check_match OF((deflate_state *s, IPos start, IPos match, @@ -110,11 +109,6 @@ local void check_match OF((deflate_state *s, IPos start, IPos match, #endif /* Matches of length 3 are discarded if their distance exceeds TOO_FAR */ -#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1) -/* Minimum amount of lookahead, except at the end of the input file. - * See deflate.c for comments about the MIN_MATCH+1. - */ - /* Values for max_lazy_match, good_match and max_chain_length, depending on * the desired pack level (0..9). The values given below have been tuned to * exclude worst case performance for pathological files. Better values may be @@ -288,6 +282,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy, s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos)); s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos)); + s->high_water = 0; /* nothing written to s->window yet */ + s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */ overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2); @@ -332,8 +328,8 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength) strm->adler = adler32(strm->adler, dictionary, dictLength); if (length < MIN_MATCH) return Z_OK; - if (length > MAX_DIST(s)) { - length = MAX_DIST(s); + if (length > s->w_size) { + length = s->w_size; dictionary += dictLength - length; /* use the tail of the dictionary */ } zmemcpy(s->window, dictionary, length); @@ -435,9 +431,10 @@ int ZEXPORT deflateParams(strm, level, strategy) } func = configuration_table[s->level].func; - if (func != configuration_table[level].func && strm->total_in != 0) { + if ((strategy != s->strategy || func != configuration_table[level].func) && + strm->total_in != 0) { /* Flush the last buffer: */ - err = deflate(strm, Z_PARTIAL_FLUSH); + err = deflate(strm, Z_BLOCK); } if (s->level != level) { s->level = level; @@ -481,33 +478,66 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain) * resulting from using fixed blocks instead of stored blocks, which deflate * can emit on compressed data for some combinations of the parameters. * - * This function could be more sophisticated to provide closer upper bounds - * for every combination of windowBits and memLevel, as well as wrap. - * But even the conservative upper bound of about 14% expansion does not - * seem onerous for output buffer allocation. + * This function could be more sophisticated to provide closer upper bounds for + * every combination of windowBits and memLevel. But even the conservative + * upper bound of about 14% expansion does not seem onerous for output buffer + * allocation. */ uLong ZEXPORT deflateBound(strm, sourceLen) z_streamp strm; uLong sourceLen; { deflate_state *s; - uLong destLen; + uLong complen, wraplen; + Bytef *str; - /* conservative upper bound */ - destLen = sourceLen + - ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11; + /* conservative upper bound for compressed data */ + complen = sourceLen + + ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5; - /* if can't get parameters, return conservative bound */ + /* if can't get parameters, return conservative bound plus zlib wrapper */ if (strm == Z_NULL || strm->state == Z_NULL) - return destLen; + return complen + 6; + + /* compute wrapper length */ + s = strm->state; + switch (s->wrap) { + case 0: /* raw deflate */ + wraplen = 0; + break; + case 1: /* zlib wrapper */ + wraplen = 6 + (s->strstart ? 4 : 0); + break; + case 2: /* gzip wrapper */ + wraplen = 18; + if (s->gzhead != Z_NULL) { /* user-supplied gzip header */ + if (s->gzhead->extra != Z_NULL) + wraplen += 2 + s->gzhead->extra_len; + str = s->gzhead->name; + if (str != Z_NULL) + do { + wraplen++; + } while (*str++); + str = s->gzhead->comment; + if (str != Z_NULL) + do { + wraplen++; + } while (*str++); + if (s->gzhead->hcrc) + wraplen += 2; + } + break; + default: /* for compiler happiness */ + wraplen = 6; + } /* if not default parameters, return conservative bound */ - s = strm->state; if (s->w_bits != 15 || s->hash_bits != 8 + 7) - return destLen; + return complen + wraplen; /* default settings: return tight bound for that case */ - return compressBound(sourceLen); + return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + + (sourceLen >> 25) + 13 - 6 + wraplen; } /* ========================================================================= @@ -557,7 +587,7 @@ int ZEXPORT deflate (strm, flush) deflate_state *s; if (strm == Z_NULL || strm->state == Z_NULL || - flush > Z_FINISH || flush < 0) { + flush > Z_BLOCK || flush < 0) { return Z_STREAM_ERROR; } s = strm->state; @@ -581,7 +611,7 @@ int ZEXPORT deflate (strm, flush) put_byte(s, 31); put_byte(s, 139); put_byte(s, 8); - if (s->gzhead == NULL) { + if (s->gzhead == Z_NULL) { put_byte(s, 0); put_byte(s, 0); put_byte(s, 0); @@ -608,7 +638,7 @@ int ZEXPORT deflate (strm, flush) (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ? 4 : 0)); put_byte(s, s->gzhead->os & 0xff); - if (s->gzhead->extra != NULL) { + if (s->gzhead->extra != Z_NULL) { put_byte(s, s->gzhead->extra_len & 0xff); put_byte(s, (s->gzhead->extra_len >> 8) & 0xff); } @@ -650,7 +680,7 @@ int ZEXPORT deflate (strm, flush) } #ifdef GZIP if (s->status == EXTRA_STATE) { - if (s->gzhead->extra != NULL) { + if (s->gzhead->extra != Z_NULL) { uInt beg = s->pending; /* start of bytes to update crc */ while (s->gzindex < (s->gzhead->extra_len & 0xffff)) { @@ -678,7 +708,7 @@ int ZEXPORT deflate (strm, flush) s->status = NAME_STATE; } if (s->status == NAME_STATE) { - if (s->gzhead->name != NULL) { + if (s->gzhead->name != Z_NULL) { uInt beg = s->pending; /* start of bytes to update crc */ int val; @@ -709,7 +739,7 @@ int ZEXPORT deflate (strm, flush) s->status = COMMENT_STATE; } if (s->status == COMMENT_STATE) { - if (s->gzhead->comment != NULL) { + if (s->gzhead->comment != Z_NULL) { uInt beg = s->pending; /* start of bytes to update crc */ int val; @@ -787,7 +817,9 @@ int ZEXPORT deflate (strm, flush) (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) { block_state bstate; - bstate = (*(configuration_table[s->level].func))(s, flush); + bstate = s->strategy == Z_HUFFMAN_ONLY ? deflate_huff(s, flush) : + (s->strategy == Z_RLE ? deflate_rle(s, flush) : + (*(configuration_table[s->level].func))(s, flush)); if (bstate == finish_started || bstate == finish_done) { s->status = FINISH_STATE; @@ -808,13 +840,17 @@ int ZEXPORT deflate (strm, flush) if (bstate == block_done) { if (flush == Z_PARTIAL_FLUSH) { _tr_align(s); - } else { /* FULL_FLUSH or SYNC_FLUSH */ + } else if (flush != Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */ _tr_stored_block(s, (char*)0, 0L, 0); /* For a full flush, this empty block will be recognized * as a special marker by inflate_sync(). */ if (flush == Z_FULL_FLUSH) { CLEAR_HASH(s); /* forget history */ + if (s->lookahead == 0) { + s->strstart = 0; + s->block_start = 0L; + } } } flush_pending(strm); @@ -1167,12 +1203,13 @@ local uInt longest_match(s, cur_match) return s->lookahead; } #endif /* ASMV */ -#endif /* FASTEST */ + +#else /* FASTEST */ /* --------------------------------------------------------------------------- - * Optimized version for level == 1 or strategy == Z_RLE only + * Optimized version for FASTEST only */ -local uInt longest_match_fast(s, cur_match) +local uInt longest_match(s, cur_match) deflate_state *s; IPos cur_match; /* current match */ { @@ -1225,6 +1262,8 @@ local uInt longest_match_fast(s, cur_match) return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead; } +#endif /* FASTEST */ + #ifdef DEBUG /* =========================================================================== * Check that the match at match_start is indeed a match. @@ -1303,7 +1342,6 @@ local void fill_window(s) later. (Using level 0 permanently is not an optimal usage of zlib, so we don't care about this pathological case.) */ - /* %%% avoid this when Z_RLE */ n = s->hash_size; p = &s->head[n]; do { @@ -1355,27 +1393,61 @@ local void fill_window(s) */ } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0); + + /* If the WIN_INIT bytes after the end of the current data have never been + * written, then zero those bytes in order to avoid memory check reports of + * the use of uninitialized (or uninitialised as Julian writes) bytes by + * the longest match routines. Update the high water mark for the next + * time through here. WIN_INIT is set to MAX_MATCH since the longest match + * routines allow scanning to strstart + MAX_MATCH, ignoring lookahead. + */ + if (s->high_water < s->window_size) { + ulg curr = s->strstart + (ulg)(s->lookahead); + ulg init; + + if (s->high_water < curr) { + /* Previous high water mark below current data -- zero WIN_INIT + * bytes or up to end of window, whichever is less. + */ + init = s->window_size - curr; + if (init > WIN_INIT) + init = WIN_INIT; + zmemzero(s->window + curr, (unsigned)init); + s->high_water = curr + init; + } + else if (s->high_water < (ulg)curr + WIN_INIT) { + /* High water mark at or above current data, but below current data + * plus WIN_INIT -- zero out to current data plus WIN_INIT, or up + * to end of window, whichever is less. + */ + init = (ulg)curr + WIN_INIT - s->high_water; + if (init > s->window_size - s->high_water) + init = s->window_size - s->high_water; + zmemzero(s->window + s->high_water, (unsigned)init); + s->high_water += init; + } + } } /* =========================================================================== * Flush the current block, with given end-of-file flag. * IN assertion: strstart is set to the end of the current match. */ -#define FLUSH_BLOCK_ONLY(s, eof) { \ +#define FLUSH_BLOCK_ONLY(s, last) { \ _tr_flush_block(s, (s->block_start >= 0L ? \ (charf *)&s->window[(unsigned)s->block_start] : \ (charf *)Z_NULL), \ (ulg)((long)s->strstart - s->block_start), \ - (eof)); \ + (last)); \ s->block_start = s->strstart; \ flush_pending(s->strm); \ Tracev((stderr,"[FLUSH]")); \ } /* Same but force premature exit if necessary. */ -#define FLUSH_BLOCK(s, eof) { \ - FLUSH_BLOCK_ONLY(s, eof); \ - if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \ +#define FLUSH_BLOCK(s, last) { \ + FLUSH_BLOCK_ONLY(s, last); \ + if (s->strm->avail_out == 0) return (last) ? finish_started : need_more; \ } /* =========================================================================== @@ -1449,7 +1521,7 @@ local block_state deflate_fast(s, flush) deflate_state *s; int flush; { - IPos hash_head = NIL; /* head of the hash chain */ + IPos hash_head; /* head of the hash chain */ int bflush; /* set if current block must be flushed */ for (;;) { @@ -1469,6 +1541,7 @@ local block_state deflate_fast(s, flush) /* Insert the string window[strstart .. strstart+2] in the * dictionary, and set hash_head to the head of the hash chain: */ + hash_head = NIL; if (s->lookahead >= MIN_MATCH) { INSERT_STRING(s, s->strstart, hash_head); } @@ -1481,19 +1554,8 @@ local block_state deflate_fast(s, flush) * of window index 0 (in particular we have to avoid a match * of the string with itself at the start of the input file). */ -#ifdef FASTEST - if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) || - (s->strategy == Z_RLE && s->strstart - hash_head == 1)) { - s->match_length = longest_match_fast (s, hash_head); - } -#else - if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) { - s->match_length = longest_match (s, hash_head); - } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) { - s->match_length = longest_match_fast (s, hash_head); - } -#endif - /* longest_match() or longest_match_fast() sets match_start */ + s->match_length = longest_match (s, hash_head); + /* longest_match() sets match_start */ } if (s->match_length >= MIN_MATCH) { check_match(s, s->strstart, s->match_start, s->match_length); @@ -1555,7 +1617,7 @@ local block_state deflate_slow(s, flush) deflate_state *s; int flush; { - IPos hash_head = NIL; /* head of hash chain */ + IPos hash_head; /* head of hash chain */ int bflush; /* set if current block must be flushed */ /* Process the input block. */ @@ -1576,6 +1638,7 @@ local block_state deflate_slow(s, flush) /* Insert the string window[strstart .. strstart+2] in the * dictionary, and set hash_head to the head of the hash chain: */ + hash_head = NIL; if (s->lookahead >= MIN_MATCH) { INSERT_STRING(s, s->strstart, hash_head); } @@ -1591,12 +1654,8 @@ local block_state deflate_slow(s, flush) * of window index 0 (in particular we have to avoid a match * of the string with itself at the start of the input file). */ - if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) { - s->match_length = longest_match (s, hash_head); - } else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) { - s->match_length = longest_match_fast (s, hash_head); - } - /* longest_match() or longest_match_fast() sets match_start */ + s->match_length = longest_match (s, hash_head); + /* longest_match() sets match_start */ if (s->match_length <= 5 && (s->strategy == Z_FILTERED #if TOO_FAR <= 32767 @@ -1674,7 +1733,6 @@ local block_state deflate_slow(s, flush) } #endif /* FASTEST */ -#if 0 /* =========================================================================== * For Z_RLE, simply look for runs of bytes, generate matches only of distance * one. Do not maintain a hash table. (It will be regenerated if this run of @@ -1684,11 +1742,9 @@ local block_state deflate_rle(s, flush) deflate_state *s; int flush; { - int bflush; /* set if current block must be flushed */ - uInt run; /* length of run */ - uInt max; /* maximum length of run */ - uInt prev; /* byte at distance one to match */ - Bytef *scan; /* scan for end of run */ + int bflush; /* set if current block must be flushed */ + uInt prev; /* byte at distance one to match */ + Bytef *scan, *strend; /* scan goes up to strend for length of run */ for (;;) { /* Make sure that we always have enough lookahead, except @@ -1704,23 +1760,33 @@ local block_state deflate_rle(s, flush) } /* See how many times the previous byte repeats */ - run = 0; - if (s->strstart > 0) { /* if there is a previous byte, that is */ - max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH; + s->match_length = 0; + if (s->lookahead >= MIN_MATCH && s->strstart > 0) { scan = s->window + s->strstart - 1; - prev = *scan++; - do { - if (*scan++ != prev) - break; - } while (++run < max); + prev = *scan; + if (prev == *++scan && prev == *++scan && prev == *++scan) { + strend = s->window + s->strstart + MAX_MATCH; + do { + } while (prev == *++scan && prev == *++scan && + prev == *++scan && prev == *++scan && + prev == *++scan && prev == *++scan && + prev == *++scan && prev == *++scan && + scan < strend); + s->match_length = MAX_MATCH - (int)(strend - scan); + if (s->match_length > s->lookahead) + s->match_length = s->lookahead; + } } /* Emit match if have run of MIN_MATCH or longer, else emit literal */ - if (run >= MIN_MATCH) { - check_match(s, s->strstart, s->strstart - 1, run); - _tr_tally_dist(s, 1, run - MIN_MATCH, bflush); - s->lookahead -= run; - s->strstart += run; + if (s->match_length >= MIN_MATCH) { + check_match(s, s->strstart, s->strstart - 1, s->match_length); + + _tr_tally_dist(s, 1, s->match_length - MIN_MATCH, bflush); + + s->lookahead -= s->match_length; + s->strstart += s->match_length; + s->match_length = 0; } else { /* No match, output a literal byte */ Tracevv((stderr,"%c", s->window[s->strstart])); @@ -1733,5 +1799,36 @@ local block_state deflate_rle(s, flush) FLUSH_BLOCK(s, flush == Z_FINISH); return flush == Z_FINISH ? finish_done : block_done; } -#endif +/* =========================================================================== + * For Z_HUFFMAN_ONLY, do not look for matches. Do not maintain a hash table. + * (It will be regenerated if this run of deflate switches away from Huffman.) + */ +local block_state deflate_huff(s, flush) + deflate_state *s; + int flush; +{ + int bflush; /* set if current block must be flushed */ + + for (;;) { + /* Make sure that we have a literal to write. */ + if (s->lookahead == 0) { + fill_window(s); + if (s->lookahead == 0) { + if (flush == Z_NO_FLUSH) + return need_more; + break; /* flush the current block */ + } + } + + /* Output a literal byte */ + s->match_length = 0; + Tracevv((stderr,"%c", s->window[s->strstart])); + _tr_tally_lit (s, s->window[s->strstart], bflush); + s->lookahead--; + s->strstart++; + if (bflush) FLUSH_BLOCK(s, 0); + } + FLUSH_BLOCK(s, flush == Z_FINISH); + return flush == Z_FINISH ? finish_done : block_done; +} diff --git a/ExternalLibs/glpng/zlib/deflate.h b/ExternalLibs/glpng/zlib/deflate.h index 05a5ab3..cbf0d1e 100644 --- a/ExternalLibs/glpng/zlib/deflate.h +++ b/ExternalLibs/glpng/zlib/deflate.h @@ -1,5 +1,5 @@ /* deflate.h -- internal compression state - * Copyright (C) 1995-2004 Jean-loup Gailly + * Copyright (C) 1995-2010 Jean-loup Gailly * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -260,6 +260,13 @@ typedef struct internal_state { * are always zero. */ + ulg high_water; + /* High water mark offset in window for initialized bytes -- bytes above + * this are set to zero in order to avoid memory check warnings when + * longest match routines access bytes past the input. This is then + * updated to the new high water mark. + */ + } FAR deflate_state; /* Output a byte on the stream. @@ -278,14 +285,18 @@ typedef struct internal_state { * distances are limited to MAX_DIST instead of WSIZE. */ +#define WIN_INIT MAX_MATCH +/* Number of bytes after end of data in window to initialize in order to avoid + memory checker errors from longest match routines */ + /* in trees.c */ -void _tr_init OF((deflate_state *s)); -int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc)); -void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len, - int eof)); -void _tr_align OF((deflate_state *s)); -void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len, - int eof)); +void ZLIB_INTERNAL _tr_init OF((deflate_state *s)); +int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc)); +void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf, + ulg stored_len, int last)); +void ZLIB_INTERNAL _tr_align OF((deflate_state *s)); +void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf, + ulg stored_len, int last)); #define d_code(dist) \ ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)]) @@ -298,11 +309,11 @@ void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len, /* Inline versions of _tr_tally for speed: */ #if defined(GEN_TREES_H) || !defined(STDC) - extern uch _length_code[]; - extern uch _dist_code[]; + extern uch ZLIB_INTERNAL _length_code[]; + extern uch ZLIB_INTERNAL _dist_code[]; #else - extern const uch _length_code[]; - extern const uch _dist_code[]; + extern const uch ZLIB_INTERNAL _length_code[]; + extern const uch ZLIB_INTERNAL _dist_code[]; #endif # define _tr_tally_lit(s, c, flush) \ diff --git a/ExternalLibs/glpng/zlib/example.c b/ExternalLibs/glpng/zlib/example.c deleted file mode 100644 index 8dff7c5..0000000 --- a/ExternalLibs/glpng/zlib/example.c +++ /dev/null @@ -1,566 +0,0 @@ -/* example.c -- usage example of the zlib compression library - * Copyright (C) 1995-2004 Jean-loup Gailly. - * For conditions of distribution and use, see copyright notice in zlib.h - */ - -/* @(#) $Id$ */ - -#include -#include "zlib.h" - -#ifdef STDC -# include -# include -#endif - -#if defined(VMS) || defined(RISCOS) -# define TESTFILE "foo-gz" -#else -# define TESTFILE "foo.gz" -#endif - -#define CHECK_ERR(err, msg) { \ - if (err != Z_OK) { \ - fprintf(stderr, "%s error: %d\n", msg, err); \ - exit(1); \ - } \ -} - -const char hello[] = "hello, hello!"; -/* "hello world" would be more standard, but the repeated "hello" - * stresses the compression code better, sorry... - */ - -const char dictionary[] = "hello"; -uLong dictId; /* Adler32 value of the dictionary */ - -void test_compress OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -void test_gzio OF((const char *fname, - Byte *uncompr, uLong uncomprLen)); -void test_deflate OF((Byte *compr, uLong comprLen)); -void test_inflate OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -void test_large_deflate OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -void test_large_inflate OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -void test_flush OF((Byte *compr, uLong *comprLen)); -void test_sync OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -void test_dict_deflate OF((Byte *compr, uLong comprLen)); -void test_dict_inflate OF((Byte *compr, uLong comprLen, - Byte *uncompr, uLong uncomprLen)); -int main OF((int argc, char *argv[])); - -/* =========================================================================== - * Test compress() and uncompress() - */ -void test_compress(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - int err; - uLong len = (uLong)strlen(hello)+1; - - err = compress(compr, &comprLen, (const Bytef*)hello, len); - CHECK_ERR(err, "compress"); - - strcpy((char*)uncompr, "garbage"); - - err = uncompress(uncompr, &uncomprLen, compr, comprLen); - CHECK_ERR(err, "uncompress"); - - if (strcmp((char*)uncompr, hello)) { - fprintf(stderr, "bad uncompress\n"); - exit(1); - } else { - printf("uncompress(): %s\n", (char *)uncompr); - } -} - -/* =========================================================================== - * Test read/write of .gz files - */ -void test_gzio(fname, uncompr, uncomprLen) - const char *fname; /* compressed file name */ - Byte *uncompr; - uLong uncomprLen; -{ -#ifdef NO_GZCOMPRESS - fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n"); -#else - int err; - int len = (int)strlen(hello)+1; - gzFile file; - z_off_t pos; - - file = gzopen(fname, "wb"); - if (file == NULL) { - fprintf(stderr, "gzopen error\n"); - exit(1); - } - gzputc(file, 'h'); - if (gzputs(file, "ello") != 4) { - fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err)); - exit(1); - } - if (gzprintf(file, ", %s!", "hello") != 8) { - fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err)); - exit(1); - } - gzseek(file, 1L, SEEK_CUR); /* add one zero byte */ - gzclose(file); - - file = gzopen(fname, "rb"); - if (file == NULL) { - fprintf(stderr, "gzopen error\n"); - exit(1); - } - strcpy((char*)uncompr, "garbage"); - - if (gzread(file, uncompr, (unsigned)uncomprLen) != len) { - fprintf(stderr, "gzread err: %s\n", gzerror(file, &err)); - exit(1); - } - if (strcmp((char*)uncompr, hello)) { - fprintf(stderr, "bad gzread: %s\n", (char*)uncompr); - exit(1); - } else { - printf("gzread(): %s\n", (char*)uncompr); - } - - pos = gzseek(file, -8L, SEEK_CUR); - if (pos != 6 || gztell(file) != pos) { - fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n", - (long)pos, (long)gztell(file)); - exit(1); - } - - if (gzgetc(file) != ' ') { - fprintf(stderr, "gzgetc error\n"); - exit(1); - } - - if (gzungetc(' ', file) != ' ') { - fprintf(stderr, "gzungetc error\n"); - exit(1); - } - - gzgets(file, (char*)uncompr, (int)uncomprLen); - if (strlen((char*)uncompr) != 7) { /* " hello!" */ - fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err)); - exit(1); - } - if (strcmp((char*)uncompr, hello + 6)) { - fprintf(stderr, "bad gzgets after gzseek\n"); - exit(1); - } else { - printf("gzgets() after gzseek: %s\n", (char*)uncompr); - } - - gzclose(file); -#endif -} - -/* =========================================================================== - * Test deflate() with small buffers - */ -void test_deflate(compr, comprLen) - Byte *compr; - uLong comprLen; -{ - z_stream c_stream; /* compression stream */ - int err; - uLong len = (uLong)strlen(hello)+1; - - c_stream.zalloc = (alloc_func)0; - c_stream.zfree = (free_func)0; - c_stream.opaque = (voidpf)0; - - err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION); - CHECK_ERR(err, "deflateInit"); - - c_stream.next_in = (Bytef*)hello; - c_stream.next_out = compr; - - while (c_stream.total_in != len && c_stream.total_out < comprLen) { - c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */ - err = deflate(&c_stream, Z_NO_FLUSH); - CHECK_ERR(err, "deflate"); - } - /* Finish the stream, still forcing small buffers: */ - for (;;) { - c_stream.avail_out = 1; - err = deflate(&c_stream, Z_FINISH); - if (err == Z_STREAM_END) break; - CHECK_ERR(err, "deflate"); - } - - err = deflateEnd(&c_stream); - CHECK_ERR(err, "deflateEnd"); -} - -/* =========================================================================== - * Test inflate() with small buffers - */ -void test_inflate(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - int err; - z_stream d_stream; /* decompression stream */ - - strcpy((char*)uncompr, "garbage"); - - d_stream.zalloc = (alloc_func)0; - d_stream.zfree = (free_func)0; - d_stream.opaque = (voidpf)0; - - d_stream.next_in = compr; - d_stream.avail_in = 0; - d_stream.next_out = uncompr; - - err = inflateInit(&d_stream); - CHECK_ERR(err, "inflateInit"); - - while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) { - d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */ - err = inflate(&d_stream, Z_NO_FLUSH); - if (err == Z_STREAM_END) break; - CHECK_ERR(err, "inflate"); - } - - err = inflateEnd(&d_stream); - CHECK_ERR(err, "inflateEnd"); - - if (strcmp((char*)uncompr, hello)) { - fprintf(stderr, "bad inflate\n"); - exit(1); - } else { - printf("inflate(): %s\n", (char *)uncompr); - } -} - -/* =========================================================================== - * Test deflate() with large buffers and dynamic change of compression level - */ -void test_large_deflate(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - z_stream c_stream; /* compression stream */ - int err; - - c_stream.zalloc = (alloc_func)0; - c_stream.zfree = (free_func)0; - c_stream.opaque = (voidpf)0; - - err = deflateInit(&c_stream, Z_BEST_SPEED); - CHECK_ERR(err, "deflateInit"); - - c_stream.next_out = compr; - c_stream.avail_out = (uInt)comprLen; - - /* At this point, uncompr is still mostly zeroes, so it should compress - * very well: - */ - c_stream.next_in = uncompr; - c_stream.avail_in = (uInt)uncomprLen; - err = deflate(&c_stream, Z_NO_FLUSH); - CHECK_ERR(err, "deflate"); - if (c_stream.avail_in != 0) { - fprintf(stderr, "deflate not greedy\n"); - exit(1); - } - - /* Feed in already compressed data and switch to no compression: */ - deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY); - c_stream.next_in = compr; - c_stream.avail_in = (uInt)comprLen/2; - err = deflate(&c_stream, Z_NO_FLUSH); - CHECK_ERR(err, "deflate"); - - /* Switch back to compressing mode: */ - deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED); - c_stream.next_in = uncompr; - c_stream.avail_in = (uInt)uncomprLen; - err = deflate(&c_stream, Z_NO_FLUSH); - CHECK_ERR(err, "deflate"); - - err = deflate(&c_stream, Z_FINISH); - if (err != Z_STREAM_END) { - fprintf(stderr, "deflate should report Z_STREAM_END\n"); - exit(1); - } - err = deflateEnd(&c_stream); - CHECK_ERR(err, "deflateEnd"); -} - -/* =========================================================================== - * Test inflate() with large buffers - */ -void test_large_inflate(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - int err; - z_stream d_stream; /* decompression stream */ - - strcpy((char*)uncompr, "garbage"); - - d_stream.zalloc = (alloc_func)0; - d_stream.zfree = (free_func)0; - d_stream.opaque = (voidpf)0; - - d_stream.next_in = compr; - d_stream.avail_in = (uInt)comprLen; - - err = inflateInit(&d_stream); - CHECK_ERR(err, "inflateInit"); - - for (;;) { - d_stream.next_out = uncompr; /* discard the output */ - d_stream.avail_out = (uInt)uncomprLen; - err = inflate(&d_stream, Z_NO_FLUSH); - if (err == Z_STREAM_END) break; - CHECK_ERR(err, "large inflate"); - } - - err = inflateEnd(&d_stream); - CHECK_ERR(err, "inflateEnd"); - - if (d_stream.total_out != 2*uncomprLen + comprLen/2) { - fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out); - exit(1); - } else { - printf("large_inflate(): OK\n"); - } -} - -/* =========================================================================== - * Test deflate() with full flush - */ -void test_flush(compr, comprLen) - Byte *compr; - uLong *comprLen; -{ - z_stream c_stream; /* compression stream */ - int err; - uInt len = (uInt)strlen(hello)+1; - - c_stream.zalloc = (alloc_func)0; - c_stream.zfree = (free_func)0; - c_stream.opaque = (voidpf)0; - - err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION); - CHECK_ERR(err, "deflateInit"); - - c_stream.next_in = (Bytef*)hello; - c_stream.next_out = compr; - c_stream.avail_in = 3; - c_stream.avail_out = (uInt)*comprLen; - err = deflate(&c_stream, Z_FULL_FLUSH); - CHECK_ERR(err, "deflate"); - - compr[3]++; /* force an error in first compressed block */ - c_stream.avail_in = len - 3; - - err = deflate(&c_stream, Z_FINISH); - if (err != Z_STREAM_END) { - CHECK_ERR(err, "deflate"); - } - err = deflateEnd(&c_stream); - CHECK_ERR(err, "deflateEnd"); - - *comprLen = c_stream.total_out; -} - -/* =========================================================================== - * Test inflateSync() - */ -void test_sync(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - int err; - z_stream d_stream; /* decompression stream */ - - strcpy((char*)uncompr, "garbage"); - - d_stream.zalloc = (alloc_func)0; - d_stream.zfree = (free_func)0; - d_stream.opaque = (voidpf)0; - - d_stream.next_in = compr; - d_stream.avail_in = 2; /* just read the zlib header */ - - err = inflateInit(&d_stream); - CHECK_ERR(err, "inflateInit"); - - d_stream.next_out = uncompr; - d_stream.avail_out = (uInt)uncomprLen; - - inflate(&d_stream, Z_NO_FLUSH); - CHECK_ERR(err, "inflate"); - - d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */ - err = inflateSync(&d_stream); /* but skip the damaged part */ - CHECK_ERR(err, "inflateSync"); - - err = inflate(&d_stream, Z_FINISH); - if (err != Z_DATA_ERROR) { - fprintf(stderr, "inflate should report DATA_ERROR\n"); - /* Because of incorrect adler32 */ - exit(1); - } - err = inflateEnd(&d_stream); - CHECK_ERR(err, "inflateEnd"); - - printf("after inflateSync(): hel%s\n", (char *)uncompr); -} - -/* =========================================================================== - * Test deflate() with preset dictionary - */ -void test_dict_deflate(compr, comprLen) - Byte *compr; - uLong comprLen; -{ - z_stream c_stream; /* compression stream */ - int err; - - c_stream.zalloc = (alloc_func)0; - c_stream.zfree = (free_func)0; - c_stream.opaque = (voidpf)0; - - err = deflateInit(&c_stream, Z_BEST_COMPRESSION); - CHECK_ERR(err, "deflateInit"); - - err = deflateSetDictionary(&c_stream, - (const Bytef*)dictionary, sizeof(dictionary)); - CHECK_ERR(err, "deflateSetDictionary"); - - dictId = c_stream.adler; - c_stream.next_out = compr; - c_stream.avail_out = (uInt)comprLen; - - c_stream.next_in = (Bytef*)hello; - c_stream.avail_in = (uInt)strlen(hello)+1; - - err = deflate(&c_stream, Z_FINISH); - if (err != Z_STREAM_END) { - fprintf(stderr, "deflate should report Z_STREAM_END\n"); - exit(1); - } - err = deflateEnd(&c_stream); - CHECK_ERR(err, "deflateEnd"); -} - -/* =========================================================================== - * Test inflate() with a preset dictionary - */ -void test_dict_inflate(compr, comprLen, uncompr, uncomprLen) - Byte *compr, *uncompr; - uLong comprLen, uncomprLen; -{ - int err; - z_stream d_stream; /* decompression stream */ - - strcpy((char*)uncompr, "garbage"); - - d_stream.zalloc = (alloc_func)0; - d_stream.zfree = (free_func)0; - d_stream.opaque = (voidpf)0; - - d_stream.next_in = compr; - d_stream.avail_in = (uInt)comprLen; - - err = inflateInit(&d_stream); - CHECK_ERR(err, "inflateInit"); - - d_stream.next_out = uncompr; - d_stream.avail_out = (uInt)uncomprLen; - - for (;;) { - err = inflate(&d_stream, Z_NO_FLUSH); - if (err == Z_STREAM_END) break; - if (err == Z_NEED_DICT) { - if (d_stream.adler != dictId) { - fprintf(stderr, "unexpected dictionary"); - exit(1); - } - err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary, - sizeof(dictionary)); - } - CHECK_ERR(err, "inflate with dict"); - } - - err = inflateEnd(&d_stream); - CHECK_ERR(err, "inflateEnd"); - - if (strcmp((char*)uncompr, hello)) { - fprintf(stderr, "bad inflate with dict\n"); - exit(1); - } else { - printf("inflate with dictionary: %s\n", (char *)uncompr); - } -} - -/* =========================================================================== - * Usage: example [output.gz [input.gz]] - */ - -int main(argc, argv) - int argc; - char *argv[]; -{ - Byte *compr, *uncompr; - uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */ - uLong uncomprLen = comprLen; - static const char* myVersion = ZLIB_VERSION; - - if (zlibVersion()[0] != myVersion[0]) { - fprintf(stderr, "incompatible zlib version\n"); - exit(1); - - } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) { - fprintf(stderr, "warning: different zlib version\n"); - } - - printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n", - ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags()); - - compr = (Byte*)calloc((uInt)comprLen, 1); - uncompr = (Byte*)calloc((uInt)uncomprLen, 1); - /* compr and uncompr are cleared to avoid reading uninitialized - * data and to ensure that uncompr compresses well. - */ - if (compr == Z_NULL || uncompr == Z_NULL) { - printf("out of memory\n"); - exit(1); - } - test_compress(compr, comprLen, uncompr, uncomprLen); - - test_gzio((argc > 1 ? argv[1] : TESTFILE), - uncompr, uncomprLen); - - test_deflate(compr, comprLen); - test_inflate(compr, comprLen, uncompr, uncomprLen); - - test_large_deflate(compr, comprLen, uncompr, uncomprLen); - test_large_inflate(compr, comprLen, uncompr, uncomprLen); - - test_flush(compr, &comprLen); - test_sync(compr, comprLen, uncompr, uncomprLen); - comprLen = uncomprLen; - - test_dict_deflate(compr, comprLen); - test_dict_inflate(compr, comprLen, uncompr, uncomprLen); - - free(compr); - free(uncompr); - - return 0; -} - diff --git a/ExternalLibs/glpng/zlib/gzio.c b/ExternalLibs/glpng/zlib/gzio.c deleted file mode 100644 index dda52b1..0000000 --- a/ExternalLibs/glpng/zlib/gzio.c +++ /dev/null @@ -1,1027 +0,0 @@ -/* gzio.c -- IO on .gz files - * Copyright (C) 1995-2005 Jean-loup Gailly. - * For conditions of distribution and use, see copyright notice in zlib.h - * - * Compile this file with -DNO_GZCOMPRESS to avoid the compression code. - */ - -/* @(#) $Id$ */ - -#include - -#include "zutil.h" - -#ifdef NO_DEFLATE /* for compatibility with old definition */ -# define NO_GZCOMPRESS -#endif - -#ifndef NO_DUMMY_DECL -struct internal_state {int dummy;}; /* for buggy compilers */ -#endif - -#ifndef Z_BUFSIZE -# ifdef MAXSEG_64K -# define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */ -# else -# define Z_BUFSIZE 16384 -# endif -#endif -#ifndef Z_PRINTF_BUFSIZE -# define Z_PRINTF_BUFSIZE 4096 -#endif - -#ifdef __MVS__ -# pragma map (fdopen , "\174\174FDOPEN") - FILE *fdopen(int, const char *); -#endif - -#ifndef STDC -extern voidp malloc OF((uInt size)); -extern void free OF((voidpf ptr)); -#endif - -#define ALLOC(size) malloc(size) -#define TRYFREE(p) {if (p) free(p);} - -static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */ - -/* gzip flag byte */ -#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ -#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */ -#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ -#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ -#define COMMENT 0x10 /* bit 4 set: file comment present */ -#define RESERVED 0xE0 /* bits 5..7: reserved */ - -typedef struct gz_stream { - z_stream stream; - int z_err; /* error code for last stream operation */ - int z_eof; /* set if end of input file */ - FILE *file; /* .gz file */ - Byte *inbuf; /* input buffer */ - Byte *outbuf; /* output buffer */ - uLong crc; /* crc32 of uncompressed data */ - char *msg; /* error message */ - char *path; /* path name for debugging only */ - int transparent; /* 1 if input file is not a .gz file */ - char mode; /* 'w' or 'r' */ - z_off_t start; /* start of compressed data in file (header skipped) */ - z_off_t in; /* bytes into deflate or inflate */ - z_off_t out; /* bytes out of deflate or inflate */ - int back; /* one character push-back */ - int last; /* true if push-back is last character */ -} gz_stream; - - -local gzFile gz_open OF((const char *path, const char *mode, int fd)); -local int do_flush OF((gzFile file, int flush)); -local int get_byte OF((gz_stream *s)); -local void check_header OF((gz_stream *s)); -local int destroy OF((gz_stream *s)); -local void putLong OF((FILE *file, uLong x)); -local uLong getLong OF((gz_stream *s)); - -/* =========================================================================== - Opens a gzip (.gz) file for reading or writing. The mode parameter - is as in fopen ("rb" or "wb"). The file is given either by file descriptor - or path name (if fd == -1). - gz_open returns NULL if the file could not be opened or if there was - insufficient memory to allocate the (de)compression state; errno - can be checked to distinguish the two cases (if errno is zero, the - zlib error is Z_MEM_ERROR). -*/ -local gzFile gz_open (path, mode, fd) - const char *path; - const char *mode; - int fd; -{ - int err; - int level = Z_DEFAULT_COMPRESSION; /* compression level */ - int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */ - char *p = (char*)mode; - gz_stream *s; - char fmode[80]; /* copy of mode, without the compression level */ - char *m = fmode; - - if (!path || !mode) return Z_NULL; - - s = (gz_stream *)ALLOC(sizeof(gz_stream)); - if (!s) return Z_NULL; - - s->stream.zalloc = (alloc_func)0; - s->stream.zfree = (free_func)0; - s->stream.opaque = (voidpf)0; - s->stream.next_in = s->inbuf = Z_NULL; - s->stream.next_out = s->outbuf = Z_NULL; - s->stream.avail_in = s->stream.avail_out = 0; - s->file = NULL; - s->z_err = Z_OK; - s->z_eof = 0; - s->in = 0; - s->out = 0; - s->back = EOF; - s->crc = crc32(0L, Z_NULL, 0); - s->msg = NULL; - s->transparent = 0; - - s->path = (char*)ALLOC(strlen(path)+1); - if (s->path == NULL) { - return destroy(s), (gzFile)Z_NULL; - } - strcpy(s->path, path); /* do this early for debugging */ - - s->mode = '\0'; - do { - if (*p == 'r') s->mode = 'r'; - if (*p == 'w' || *p == 'a') s->mode = 'w'; - if (*p >= '0' && *p <= '9') { - level = *p - '0'; - } else if (*p == 'f') { - strategy = Z_FILTERED; - } else if (*p == 'h') { - strategy = Z_HUFFMAN_ONLY; - } else if (*p == 'R') { - strategy = Z_RLE; - } else { - *m++ = *p; /* copy the mode */ - } - } while (*p++ && m != fmode + sizeof(fmode)); - if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL; - - if (s->mode == 'w') { -#ifdef NO_GZCOMPRESS - err = Z_STREAM_ERROR; -#else - err = deflateInit2(&(s->stream), level, - Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy); - /* windowBits is passed < 0 to suppress zlib header */ - - s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE); -#endif - if (err != Z_OK || s->outbuf == Z_NULL) { - return destroy(s), (gzFile)Z_NULL; - } - } else { - s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); - - err = inflateInit2(&(s->stream), -MAX_WBITS); - /* windowBits is passed < 0 to tell that there is no zlib header. - * Note that in this case inflate *requires* an extra "dummy" byte - * after the compressed stream in order to complete decompression and - * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are - * present after the compressed stream. - */ - if (err != Z_OK || s->inbuf == Z_NULL) { - return destroy(s), (gzFile)Z_NULL; - } - } - s->stream.avail_out = Z_BUFSIZE; - - errno = 0; - s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode); - - if (s->file == NULL) { - return destroy(s), (gzFile)Z_NULL; - } - if (s->mode == 'w') { - /* Write a very simple .gz header: - */ - fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1], - Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE); - s->start = 10L; - /* We use 10L instead of ftell(s->file) to because ftell causes an - * fflush on some systems. This version of the library doesn't use - * start anyway in write mode, so this initialization is not - * necessary. - */ - } else { - check_header(s); /* skip the .gz header */ - s->start = ftell(s->file) - s->stream.avail_in; - } - - return (gzFile)s; -} - -/* =========================================================================== - Opens a gzip (.gz) file for reading or writing. -*/ -gzFile ZEXPORT gzopen (path, mode) - const char *path; - const char *mode; -{ - return gz_open (path, mode, -1); -} - -/* =========================================================================== - Associate a gzFile with the file descriptor fd. fd is not dup'ed here - to mimic the behavio(u)r of fdopen. -*/ -gzFile ZEXPORT gzdopen (fd, mode) - int fd; - const char *mode; -{ - char name[46]; /* allow for up to 128-bit integers */ - - if (fd < 0) return (gzFile)Z_NULL; - sprintf(name, "", fd); /* for debugging */ - - return gz_open (name, mode, fd); -} - -/* =========================================================================== - * Update the compression level and strategy - */ -int ZEXPORT gzsetparams (file, level, strategy) - gzFile file; - int level; - int strategy; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; - - /* Make room to allow flushing */ - if (s->stream.avail_out == 0) { - - s->stream.next_out = s->outbuf; - if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) { - s->z_err = Z_ERRNO; - } - s->stream.avail_out = Z_BUFSIZE; - } - - return deflateParams (&(s->stream), level, strategy); -} - -/* =========================================================================== - Read a byte from a gz_stream; update next_in and avail_in. Return EOF - for end of file. - IN assertion: the stream s has been sucessfully opened for reading. -*/ -local int get_byte(s) - gz_stream *s; -{ - if (s->z_eof) return EOF; - if (s->stream.avail_in == 0) { - errno = 0; - s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); - if (s->stream.avail_in == 0) { - s->z_eof = 1; - if (ferror(s->file)) s->z_err = Z_ERRNO; - return EOF; - } - s->stream.next_in = s->inbuf; - } - s->stream.avail_in--; - return *(s->stream.next_in)++; -} - -/* =========================================================================== - Check the gzip header of a gz_stream opened for reading. Set the stream - mode to transparent if the gzip magic header is not present; set s->err - to Z_DATA_ERROR if the magic header is present but the rest of the header - is incorrect. - IN assertion: the stream s has already been created sucessfully; - s->stream.avail_in is zero for the first time, but may be non-zero - for concatenated .gz files. -*/ -local void check_header(s) - gz_stream *s; -{ - int method; /* method byte */ - int flags; /* flags byte */ - uInt len; - int c; - - /* Assure two bytes in the buffer so we can peek ahead -- handle case - where first byte of header is at the end of the buffer after the last - gzip segment */ - len = s->stream.avail_in; - if (len < 2) { - if (len) s->inbuf[0] = s->stream.next_in[0]; - errno = 0; - len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file); - if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO; - s->stream.avail_in += len; - s->stream.next_in = s->inbuf; - if (s->stream.avail_in < 2) { - s->transparent = s->stream.avail_in; - return; - } - } - - /* Peek ahead to check the gzip magic header */ - if (s->stream.next_in[0] != gz_magic[0] || - s->stream.next_in[1] != gz_magic[1]) { - s->transparent = 1; - return; - } - s->stream.avail_in -= 2; - s->stream.next_in += 2; - - /* Check the rest of the gzip header */ - method = get_byte(s); - flags = get_byte(s); - if (method != Z_DEFLATED || (flags & RESERVED) != 0) { - s->z_err = Z_DATA_ERROR; - return; - } - - /* Discard time, xflags and OS code: */ - for (len = 0; len < 6; len++) (void)get_byte(s); - - if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */ - len = (uInt)get_byte(s); - len += ((uInt)get_byte(s))<<8; - /* len is garbage if EOF but the loop below will quit anyway */ - while (len-- != 0 && get_byte(s) != EOF) ; - } - if ((flags & ORIG_NAME) != 0) { /* skip the original file name */ - while ((c = get_byte(s)) != 0 && c != EOF) ; - } - if ((flags & COMMENT) != 0) { /* skip the .gz file comment */ - while ((c = get_byte(s)) != 0 && c != EOF) ; - } - if ((flags & HEAD_CRC) != 0) { /* skip the header crc */ - for (len = 0; len < 2; len++) (void)get_byte(s); - } - s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK; -} - - /* =========================================================================== - * Cleanup then free the given gz_stream. Return a zlib error code. - Try freeing in the reverse order of allocations. - */ -local int destroy (s) - gz_stream *s; -{ - int err = Z_OK; - - if (!s) return Z_STREAM_ERROR; - - TRYFREE(s->msg); - - if (s->stream.state != NULL) { - if (s->mode == 'w') { -#ifdef NO_GZCOMPRESS - err = Z_STREAM_ERROR; -#else - err = deflateEnd(&(s->stream)); -#endif - } else if (s->mode == 'r') { - err = inflateEnd(&(s->stream)); - } - } - if (s->file != NULL && fclose(s->file)) { -#ifdef ESPIPE - if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */ -#endif - err = Z_ERRNO; - } - if (s->z_err < 0) err = s->z_err; - - TRYFREE(s->inbuf); - TRYFREE(s->outbuf); - TRYFREE(s->path); - TRYFREE(s); - return err; -} - -/* =========================================================================== - Reads the given number of uncompressed bytes from the compressed file. - gzread returns the number of bytes actually read (0 for end of file). -*/ -int ZEXPORT gzread (file, buf, len) - gzFile file; - voidp buf; - unsigned len; -{ - gz_stream *s = (gz_stream*)file; - Bytef *start = (Bytef*)buf; /* starting point for crc computation */ - Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */ - - if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR; - - if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1; - if (s->z_err == Z_STREAM_END) return 0; /* EOF */ - - next_out = (Byte*)buf; - s->stream.next_out = (Bytef*)buf; - s->stream.avail_out = len; - - if (s->stream.avail_out && s->back != EOF) { - *next_out++ = s->back; - s->stream.next_out++; - s->stream.avail_out--; - s->back = EOF; - s->out++; - start++; - if (s->last) { - s->z_err = Z_STREAM_END; - return 1; - } - } - - while (s->stream.avail_out != 0) { - - if (s->transparent) { - /* Copy first the lookahead bytes: */ - uInt n = s->stream.avail_in; - if (n > s->stream.avail_out) n = s->stream.avail_out; - if (n > 0) { - zmemcpy(s->stream.next_out, s->stream.next_in, n); - next_out += n; - s->stream.next_out = next_out; - s->stream.next_in += n; - s->stream.avail_out -= n; - s->stream.avail_in -= n; - } - if (s->stream.avail_out > 0) { - s->stream.avail_out -= - (uInt)fread(next_out, 1, s->stream.avail_out, s->file); - } - len -= s->stream.avail_out; - s->in += len; - s->out += len; - if (len == 0) s->z_eof = 1; - return (int)len; - } - if (s->stream.avail_in == 0 && !s->z_eof) { - - errno = 0; - s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); - if (s->stream.avail_in == 0) { - s->z_eof = 1; - if (ferror(s->file)) { - s->z_err = Z_ERRNO; - break; - } - } - s->stream.next_in = s->inbuf; - } - s->in += s->stream.avail_in; - s->out += s->stream.avail_out; - s->z_err = inflate(&(s->stream), Z_NO_FLUSH); - s->in -= s->stream.avail_in; - s->out -= s->stream.avail_out; - - if (s->z_err == Z_STREAM_END) { - /* Check CRC and original size */ - s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); - start = s->stream.next_out; - - if (getLong(s) != s->crc) { - s->z_err = Z_DATA_ERROR; - } else { - (void)getLong(s); - /* The uncompressed length returned by above getlong() may be - * different from s->out in case of concatenated .gz files. - * Check for such files: - */ - check_header(s); - if (s->z_err == Z_OK) { - inflateReset(&(s->stream)); - s->crc = crc32(0L, Z_NULL, 0); - } - } - } - if (s->z_err != Z_OK || s->z_eof) break; - } - s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); - - if (len == s->stream.avail_out && - (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO)) - return -1; - return (int)(len - s->stream.avail_out); -} - - -/* =========================================================================== - Reads one byte from the compressed file. gzgetc returns this byte - or -1 in case of end of file or error. -*/ -int ZEXPORT gzgetc(file) - gzFile file; -{ - unsigned char c; - - return gzread(file, &c, 1) == 1 ? c : -1; -} - - -/* =========================================================================== - Push one byte back onto the stream. -*/ -int ZEXPORT gzungetc(c, file) - int c; - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF; - s->back = c; - s->out--; - s->last = (s->z_err == Z_STREAM_END); - if (s->last) s->z_err = Z_OK; - s->z_eof = 0; - return c; -} - - -/* =========================================================================== - Reads bytes from the compressed file until len-1 characters are - read, or a newline character is read and transferred to buf, or an - end-of-file condition is encountered. The string is then terminated - with a null character. - gzgets returns buf, or Z_NULL in case of error. - - The current implementation is not optimized at all. -*/ -char * ZEXPORT gzgets(file, buf, len) - gzFile file; - char *buf; - int len; -{ - char *b = buf; - if (buf == Z_NULL || len <= 0) return Z_NULL; - - while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ; - *buf = '\0'; - return b == buf && len > 0 ? Z_NULL : b; -} - - -#ifndef NO_GZCOMPRESS -/* =========================================================================== - Writes the given number of uncompressed bytes into the compressed file. - gzwrite returns the number of bytes actually written (0 in case of error). -*/ -int ZEXPORT gzwrite (file, buf, len) - gzFile file; - voidpc buf; - unsigned len; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; - - s->stream.next_in = (Bytef*)buf; - s->stream.avail_in = len; - - while (s->stream.avail_in != 0) { - - if (s->stream.avail_out == 0) { - - s->stream.next_out = s->outbuf; - if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) { - s->z_err = Z_ERRNO; - break; - } - s->stream.avail_out = Z_BUFSIZE; - } - s->in += s->stream.avail_in; - s->out += s->stream.avail_out; - s->z_err = deflate(&(s->stream), Z_NO_FLUSH); - s->in -= s->stream.avail_in; - s->out -= s->stream.avail_out; - if (s->z_err != Z_OK) break; - } - s->crc = crc32(s->crc, (const Bytef *)buf, len); - - return (int)(len - s->stream.avail_in); -} - - -/* =========================================================================== - Converts, formats, and writes the args to the compressed file under - control of the format string, as in fprintf. gzprintf returns the number of - uncompressed bytes actually written (0 in case of error). -*/ -#ifdef STDC -#include - -int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...) -{ - char buf[Z_PRINTF_BUFSIZE]; - va_list va; - int len; - - buf[sizeof(buf) - 1] = 0; - va_start(va, format); -#ifdef NO_vsnprintf -# ifdef HAS_vsprintf_void - (void)vsprintf(buf, format, va); - va_end(va); - for (len = 0; len < sizeof(buf); len++) - if (buf[len] == 0) break; -# else - len = vsprintf(buf, format, va); - va_end(va); -# endif -#else -# ifdef HAS_vsnprintf_void - (void)vsnprintf(buf, sizeof(buf), format, va); - va_end(va); - len = strlen(buf); -# else - len = vsnprintf(buf, sizeof(buf), format, va); - va_end(va); -# endif -#endif - if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0) - return 0; - return gzwrite(file, buf, (unsigned)len); -} -#else /* not ANSI C */ - -int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, - a11, a12, a13, a14, a15, a16, a17, a18, a19, a20) - gzFile file; - const char *format; - int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, - a11, a12, a13, a14, a15, a16, a17, a18, a19, a20; -{ - char buf[Z_PRINTF_BUFSIZE]; - int len; - - buf[sizeof(buf) - 1] = 0; -#ifdef NO_snprintf -# ifdef HAS_sprintf_void - sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8, - a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); - for (len = 0; len < sizeof(buf); len++) - if (buf[len] == 0) break; -# else - len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8, - a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); -# endif -#else -# ifdef HAS_snprintf_void - snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8, - a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); - len = strlen(buf); -# else - len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8, - a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); -# endif -#endif - if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0) - return 0; - return gzwrite(file, buf, len); -} -#endif - -/* =========================================================================== - Writes c, converted to an unsigned char, into the compressed file. - gzputc returns the value that was written, or -1 in case of error. -*/ -int ZEXPORT gzputc(file, c) - gzFile file; - int c; -{ - unsigned char cc = (unsigned char) c; /* required for big endian systems */ - - return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1; -} - - -/* =========================================================================== - Writes the given null-terminated string to the compressed file, excluding - the terminating null character. - gzputs returns the number of characters written, or -1 in case of error. -*/ -int ZEXPORT gzputs(file, s) - gzFile file; - const char *s; -{ - return gzwrite(file, (char*)s, (unsigned)strlen(s)); -} - - -/* =========================================================================== - Flushes all pending output into the compressed file. The parameter - flush is as in the deflate() function. -*/ -local int do_flush (file, flush) - gzFile file; - int flush; -{ - uInt len; - int done = 0; - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; - - s->stream.avail_in = 0; /* should be zero already anyway */ - - for (;;) { - len = Z_BUFSIZE - s->stream.avail_out; - - if (len != 0) { - if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) { - s->z_err = Z_ERRNO; - return Z_ERRNO; - } - s->stream.next_out = s->outbuf; - s->stream.avail_out = Z_BUFSIZE; - } - if (done) break; - s->out += s->stream.avail_out; - s->z_err = deflate(&(s->stream), flush); - s->out -= s->stream.avail_out; - - /* Ignore the second of two consecutive flushes: */ - if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK; - - /* deflate has finished flushing only when it hasn't used up - * all the available space in the output buffer: - */ - done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END); - - if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break; - } - return s->z_err == Z_STREAM_END ? Z_OK : s->z_err; -} - -int ZEXPORT gzflush (file, flush) - gzFile file; - int flush; -{ - gz_stream *s = (gz_stream*)file; - int err = do_flush (file, flush); - - if (err) return err; - fflush(s->file); - return s->z_err == Z_STREAM_END ? Z_OK : s->z_err; -} -#endif /* NO_GZCOMPRESS */ - -/* =========================================================================== - Sets the starting position for the next gzread or gzwrite on the given - compressed file. The offset represents a number of bytes in the - gzseek returns the resulting offset location as measured in bytes from - the beginning of the uncompressed stream, or -1 in case of error. - SEEK_END is not implemented, returns error. - In this version of the library, gzseek can be extremely slow. -*/ -z_off_t ZEXPORT gzseek (file, offset, whence) - gzFile file; - z_off_t offset; - int whence; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || whence == SEEK_END || - s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) { - return -1L; - } - - if (s->mode == 'w') { -#ifdef NO_GZCOMPRESS - return -1L; -#else - if (whence == SEEK_SET) { - offset -= s->in; - } - if (offset < 0) return -1L; - - /* At this point, offset is the number of zero bytes to write. */ - if (s->inbuf == Z_NULL) { - s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */ - if (s->inbuf == Z_NULL) return -1L; - zmemzero(s->inbuf, Z_BUFSIZE); - } - while (offset > 0) { - uInt size = Z_BUFSIZE; - if (offset < Z_BUFSIZE) size = (uInt)offset; - - size = gzwrite(file, s->inbuf, size); - if (size == 0) return -1L; - - offset -= size; - } - return s->in; -#endif - } - /* Rest of function is for reading only */ - - /* compute absolute position */ - if (whence == SEEK_CUR) { - offset += s->out; - } - if (offset < 0) return -1L; - - if (s->transparent) { - /* map to fseek */ - s->back = EOF; - s->stream.avail_in = 0; - s->stream.next_in = s->inbuf; - if (fseek(s->file, offset, SEEK_SET) < 0) return -1L; - - s->in = s->out = offset; - return offset; - } - - /* For a negative seek, rewind and use positive seek */ - if (offset >= s->out) { - offset -= s->out; - } else if (gzrewind(file) < 0) { - return -1L; - } - /* offset is now the number of bytes to skip. */ - - if (offset != 0 && s->outbuf == Z_NULL) { - s->outbuf = (Byte*)ALLOC(Z_BUFSIZE); - if (s->outbuf == Z_NULL) return -1L; - } - if (offset && s->back != EOF) { - s->back = EOF; - s->out++; - offset--; - if (s->last) s->z_err = Z_STREAM_END; - } - while (offset > 0) { - int size = Z_BUFSIZE; - if (offset < Z_BUFSIZE) size = (int)offset; - - size = gzread(file, s->outbuf, (uInt)size); - if (size <= 0) return -1L; - offset -= size; - } - return s->out; -} - -/* =========================================================================== - Rewinds input file. -*/ -int ZEXPORT gzrewind (file) - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'r') return -1; - - s->z_err = Z_OK; - s->z_eof = 0; - s->back = EOF; - s->stream.avail_in = 0; - s->stream.next_in = s->inbuf; - s->crc = crc32(0L, Z_NULL, 0); - if (!s->transparent) (void)inflateReset(&s->stream); - s->in = 0; - s->out = 0; - return fseek(s->file, s->start, SEEK_SET); -} - -/* =========================================================================== - Returns the starting position for the next gzread or gzwrite on the - given compressed file. This position represents a number of bytes in the - uncompressed data stream. -*/ -z_off_t ZEXPORT gztell (file) - gzFile file; -{ - return gzseek(file, 0L, SEEK_CUR); -} - -/* =========================================================================== - Returns 1 when EOF has previously been detected reading the given - input stream, otherwise zero. -*/ -int ZEXPORT gzeof (file) - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - /* With concatenated compressed files that can have embedded - * crc trailers, z_eof is no longer the only/best indicator of EOF - * on a gz_stream. Handle end-of-stream error explicitly here. - */ - if (s == NULL || s->mode != 'r') return 0; - if (s->z_eof) return 1; - return s->z_err == Z_STREAM_END; -} - -/* =========================================================================== - Returns 1 if reading and doing so transparently, otherwise zero. -*/ -int ZEXPORT gzdirect (file) - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL || s->mode != 'r') return 0; - return s->transparent; -} - -/* =========================================================================== - Outputs a long in LSB order to the given file -*/ -local void putLong (file, x) - FILE *file; - uLong x; -{ - int n; - for (n = 0; n < 4; n++) { - fputc((int)(x & 0xff), file); - x >>= 8; - } -} - -/* =========================================================================== - Reads a long in LSB order from the given gz_stream. Sets z_err in case - of error. -*/ -local uLong getLong (s) - gz_stream *s; -{ - uLong x = (uLong)get_byte(s); - int c; - - x += ((uLong)get_byte(s))<<8; - x += ((uLong)get_byte(s))<<16; - c = get_byte(s); - if (c == EOF) s->z_err = Z_DATA_ERROR; - x += ((uLong)c)<<24; - return x; -} - -/* =========================================================================== - Flushes all pending output if necessary, closes the compressed file - and deallocates all the (de)compression state. -*/ -int ZEXPORT gzclose (file) - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL) return Z_STREAM_ERROR; - - if (s->mode == 'w') { -#ifdef NO_GZCOMPRESS - return Z_STREAM_ERROR; -#else - if (do_flush (file, Z_FINISH) != Z_OK) - return destroy((gz_stream*)file); - - putLong (s->file, s->crc); - putLong (s->file, (uLong)(s->in & 0xffffffff)); -#endif - } - return destroy((gz_stream*)file); -} - -#ifdef STDC -# define zstrerror(errnum) strerror(errnum) -#else -# define zstrerror(errnum) "" -#endif - -/* =========================================================================== - Returns the error message for the last error which occurred on the - given compressed file. errnum is set to zlib error number. If an - error occurred in the file system and not in the compression library, - errnum is set to Z_ERRNO and the application may consult errno - to get the exact error code. -*/ -const char * ZEXPORT gzerror (file, errnum) - gzFile file; - int *errnum; -{ - char *m; - gz_stream *s = (gz_stream*)file; - - if (s == NULL) { - *errnum = Z_STREAM_ERROR; - return (const char*)ERR_MSG(Z_STREAM_ERROR); - } - *errnum = s->z_err; - if (*errnum == Z_OK) return (const char*)""; - - m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg); - - if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err); - - TRYFREE(s->msg); - s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3); - if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR); - strcpy(s->msg, s->path); - strcat(s->msg, ": "); - strcat(s->msg, m); - return (const char*)s->msg; -} - -/* =========================================================================== - Clear the error and end-of-file flags, and do the same for the real file. -*/ -void ZEXPORT gzclearerr (file) - gzFile file; -{ - gz_stream *s = (gz_stream*)file; - - if (s == NULL) return; - if (s->z_err != Z_STREAM_END) s->z_err = Z_OK; - s->z_eof = 0; - clearerr(s->file); -} - diff --git a/ExternalLibs/glpng/zlib/infback.c b/ExternalLibs/glpng/zlib/infback.c index 702be61..af3a8c9 100644 --- a/ExternalLibs/glpng/zlib/infback.c +++ b/ExternalLibs/glpng/zlib/infback.c @@ -1,5 +1,5 @@ /* infback.c -- inflate using a call-back interface - * Copyright (C) 1995-2005 Mark Adler + * Copyright (C) 1995-2009 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -55,7 +55,7 @@ int stream_size; state->wbits = windowBits; state->wsize = 1U << windowBits; state->window = window; - state->write = 0; + state->wnext = 0; state->whave = 0; return Z_OK; } @@ -253,7 +253,7 @@ void FAR *out_desc; unsigned bits; /* bits in bit buffer */ unsigned copy; /* number of stored or match bytes to copy */ unsigned char FAR *from; /* where to copy match bytes from */ - code this; /* current decoding table entry */ + code here; /* current decoding table entry */ code last; /* parent table entry */ unsigned len; /* length to copy for repeats, bits to drop */ int ret; /* return code */ @@ -389,19 +389,19 @@ void FAR *out_desc; state->have = 0; while (state->have < state->nlen + state->ndist) { for (;;) { - this = state->lencode[BITS(state->lenbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if (this.val < 16) { - NEEDBITS(this.bits); - DROPBITS(this.bits); - state->lens[state->have++] = this.val; + if (here.val < 16) { + NEEDBITS(here.bits); + DROPBITS(here.bits); + state->lens[state->have++] = here.val; } else { - if (this.val == 16) { - NEEDBITS(this.bits + 2); - DROPBITS(this.bits); + if (here.val == 16) { + NEEDBITS(here.bits + 2); + DROPBITS(here.bits); if (state->have == 0) { strm->msg = (char *)"invalid bit length repeat"; state->mode = BAD; @@ -411,16 +411,16 @@ void FAR *out_desc; copy = 3 + BITS(2); DROPBITS(2); } - else if (this.val == 17) { - NEEDBITS(this.bits + 3); - DROPBITS(this.bits); + else if (here.val == 17) { + NEEDBITS(here.bits + 3); + DROPBITS(here.bits); len = 0; copy = 3 + BITS(3); DROPBITS(3); } else { - NEEDBITS(this.bits + 7); - DROPBITS(this.bits); + NEEDBITS(here.bits + 7); + DROPBITS(here.bits); len = 0; copy = 11 + BITS(7); DROPBITS(7); @@ -438,7 +438,16 @@ void FAR *out_desc; /* handle error breaks in while */ if (state->mode == BAD) break; - /* build code tables */ + /* check for end-of-block code (better have one) */ + if (state->lens[256] == 0) { + strm->msg = (char *)"invalid code -- missing end-of-block"; + state->mode = BAD; + break; + } + + /* build code tables -- note: do not change the lenbits or distbits + values here (9 and 6) without reading the comments in inftrees.h + concerning the ENOUGH constants, which depend on those values */ state->next = state->codes; state->lencode = (code const FAR *)(state->next); state->lenbits = 9; @@ -474,28 +483,28 @@ void FAR *out_desc; /* get a literal, length, or end-of-block code */ for (;;) { - this = state->lencode[BITS(state->lenbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if (this.op && (this.op & 0xf0) == 0) { - last = this; + if (here.op && (here.op & 0xf0) == 0) { + last = here; for (;;) { - this = state->lencode[last.val + + here = state->lencode[last.val + (BITS(last.bits + last.op) >> last.bits)]; - if ((unsigned)(last.bits + this.bits) <= bits) break; + if ((unsigned)(last.bits + here.bits) <= bits) break; PULLBYTE(); } DROPBITS(last.bits); } - DROPBITS(this.bits); - state->length = (unsigned)this.val; + DROPBITS(here.bits); + state->length = (unsigned)here.val; /* process literal */ - if (this.op == 0) { - Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ? + if (here.op == 0) { + Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? "inflate: literal '%c'\n" : - "inflate: literal 0x%02x\n", this.val)); + "inflate: literal 0x%02x\n", here.val)); ROOM(); *put++ = (unsigned char)(state->length); left--; @@ -504,21 +513,21 @@ void FAR *out_desc; } /* process end of block */ - if (this.op & 32) { + if (here.op & 32) { Tracevv((stderr, "inflate: end of block\n")); state->mode = TYPE; break; } /* invalid code */ - if (this.op & 64) { + if (here.op & 64) { strm->msg = (char *)"invalid literal/length code"; state->mode = BAD; break; } /* length code -- get extra bits, if any */ - state->extra = (unsigned)(this.op) & 15; + state->extra = (unsigned)(here.op) & 15; if (state->extra != 0) { NEEDBITS(state->extra); state->length += BITS(state->extra); @@ -528,30 +537,30 @@ void FAR *out_desc; /* get distance code */ for (;;) { - this = state->distcode[BITS(state->distbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->distcode[BITS(state->distbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if ((this.op & 0xf0) == 0) { - last = this; + if ((here.op & 0xf0) == 0) { + last = here; for (;;) { - this = state->distcode[last.val + + here = state->distcode[last.val + (BITS(last.bits + last.op) >> last.bits)]; - if ((unsigned)(last.bits + this.bits) <= bits) break; + if ((unsigned)(last.bits + here.bits) <= bits) break; PULLBYTE(); } DROPBITS(last.bits); } - DROPBITS(this.bits); - if (this.op & 64) { + DROPBITS(here.bits); + if (here.op & 64) { strm->msg = (char *)"invalid distance code"; state->mode = BAD; break; } - state->offset = (unsigned)this.val; + state->offset = (unsigned)here.val; /* get distance extra bits, if any */ - state->extra = (unsigned)(this.op) & 15; + state->extra = (unsigned)(here.op) & 15; if (state->extra != 0) { NEEDBITS(state->extra); state->offset += BITS(state->extra); @@ -621,4 +630,3 @@ z_streamp strm; Tracev((stderr, "inflate: end\n")); return Z_OK; } - diff --git a/ExternalLibs/glpng/zlib/inffast.c b/ExternalLibs/glpng/zlib/inffast.c index 9920dd3..2f1d60b 100644 --- a/ExternalLibs/glpng/zlib/inffast.c +++ b/ExternalLibs/glpng/zlib/inffast.c @@ -1,5 +1,5 @@ /* inffast.c -- fast decoding - * Copyright (C) 1995-2004 Mark Adler + * Copyright (C) 1995-2008, 2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -64,7 +64,7 @@ requires strm->avail_out >= 258 for each loop to avoid checking for output space. */ -void inflate_fast(strm, start) +void ZLIB_INTERNAL inflate_fast(strm, start) z_streamp strm; unsigned start; /* inflate()'s starting value for strm->avail_out */ { @@ -79,7 +79,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ #endif unsigned wsize; /* window size or zero if not using window */ unsigned whave; /* valid bytes in the window */ - unsigned write; /* window write index */ + unsigned wnext; /* window write index */ unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */ unsigned long hold; /* local strm->hold */ unsigned bits; /* local strm->bits */ @@ -87,7 +87,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ code const FAR *dcode; /* local strm->distcode */ unsigned lmask; /* mask for first level of length codes */ unsigned dmask; /* mask for first level of distance codes */ - code this; /* retrieved table entry */ + code here; /* retrieved table entry */ unsigned op; /* code bits, operation, extra bits, or */ /* window position, window bytes to copy */ unsigned len; /* match length, unused bytes */ @@ -106,7 +106,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ #endif wsize = state->wsize; whave = state->whave; - write = state->write; + wnext = state->wnext; window = state->window; hold = state->hold; bits = state->bits; @@ -124,20 +124,20 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ hold += (unsigned long)(PUP(in)) << bits; bits += 8; } - this = lcode[hold & lmask]; + here = lcode[hold & lmask]; dolen: - op = (unsigned)(this.bits); + op = (unsigned)(here.bits); hold >>= op; bits -= op; - op = (unsigned)(this.op); + op = (unsigned)(here.op); if (op == 0) { /* literal */ - Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ? + Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? "inflate: literal '%c'\n" : - "inflate: literal 0x%02x\n", this.val)); - PUP(out) = (unsigned char)(this.val); + "inflate: literal 0x%02x\n", here.val)); + PUP(out) = (unsigned char)(here.val); } else if (op & 16) { /* length base */ - len = (unsigned)(this.val); + len = (unsigned)(here.val); op &= 15; /* number of extra bits */ if (op) { if (bits < op) { @@ -155,14 +155,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ hold += (unsigned long)(PUP(in)) << bits; bits += 8; } - this = dcode[hold & dmask]; + here = dcode[hold & dmask]; dodist: - op = (unsigned)(this.bits); + op = (unsigned)(here.bits); hold >>= op; bits -= op; - op = (unsigned)(this.op); + op = (unsigned)(here.op); if (op & 16) { /* distance base */ - dist = (unsigned)(this.val); + dist = (unsigned)(here.val); op &= 15; /* number of extra bits */ if (bits < op) { hold += (unsigned long)(PUP(in)) << bits; @@ -187,12 +187,34 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ if (dist > op) { /* see if copy from window */ op = dist - op; /* distance back in window */ if (op > whave) { - strm->msg = (char *)"invalid distance too far back"; - state->mode = BAD; - break; + if (state->sane) { + strm->msg = + (char *)"invalid distance too far back"; + state->mode = BAD; + break; + } +#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR + if (len <= op - whave) { + do { + PUP(out) = 0; + } while (--len); + continue; + } + len -= op - whave; + do { + PUP(out) = 0; + } while (--op > whave); + if (op == 0) { + from = out - dist; + do { + PUP(out) = PUP(from); + } while (--len); + continue; + } +#endif } from = window - OFF; - if (write == 0) { /* very common case */ + if (wnext == 0) { /* very common case */ from += wsize - op; if (op < len) { /* some from window */ len -= op; @@ -202,17 +224,17 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ from = out - dist; /* rest from output */ } } - else if (write < op) { /* wrap around window */ - from += wsize + write - op; - op -= write; + else if (wnext < op) { /* wrap around window */ + from += wsize + wnext - op; + op -= wnext; if (op < len) { /* some from end of window */ len -= op; do { PUP(out) = PUP(from); } while (--op); from = window - OFF; - if (write < len) { /* some from start of window */ - op = write; + if (wnext < len) { /* some from start of window */ + op = wnext; len -= op; do { PUP(out) = PUP(from); @@ -222,7 +244,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ } } else { /* contiguous in window */ - from += write - op; + from += wnext - op; if (op < len) { /* some from window */ len -= op; do { @@ -259,7 +281,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ } } else if ((op & 64) == 0) { /* 2nd level distance code */ - this = dcode[this.val + (hold & ((1U << op) - 1))]; + here = dcode[here.val + (hold & ((1U << op) - 1))]; goto dodist; } else { @@ -269,7 +291,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ } } else if ((op & 64) == 0) { /* 2nd level length code */ - this = lcode[this.val + (hold & ((1U << op) - 1))]; + here = lcode[here.val + (hold & ((1U << op) - 1))]; goto dolen; } else if (op & 32) { /* end-of-block */ @@ -305,7 +327,7 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe): - Using bit fields for code structure - Different op definition to avoid & for extra bits (do & for table bits) - - Three separate decoding do-loops for direct, window, and write == 0 + - Three separate decoding do-loops for direct, window, and wnext == 0 - Special case for distance > 1 copies to do overlapped load and store copy - Explicit branch predictions (based on measured branch probabilities) - Deferring match copy and interspersed it with decoding subsequent codes @@ -316,4 +338,3 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */ */ #endif /* !ASMINF */ - diff --git a/ExternalLibs/glpng/zlib/inffast.h b/ExternalLibs/glpng/zlib/inffast.h index 1e88d2d..e5c1aa4 100644 --- a/ExternalLibs/glpng/zlib/inffast.h +++ b/ExternalLibs/glpng/zlib/inffast.h @@ -1,5 +1,5 @@ /* inffast.h -- header to use inffast.c - * Copyright (C) 1995-2003 Mark Adler + * Copyright (C) 1995-2003, 2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -8,4 +8,4 @@ subject to change. Applications should only use zlib.h. */ -void inflate_fast OF((z_streamp strm, unsigned start)); +void ZLIB_INTERNAL inflate_fast OF((z_streamp strm, unsigned start)); diff --git a/ExternalLibs/glpng/zlib/inflate.c b/ExternalLibs/glpng/zlib/inflate.c index 6f5258f..a8431ab 100644 --- a/ExternalLibs/glpng/zlib/inflate.c +++ b/ExternalLibs/glpng/zlib/inflate.c @@ -1,5 +1,5 @@ /* inflate.c -- zlib decompression - * Copyright (C) 1995-2005 Mark Adler + * Copyright (C) 1995-2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -45,7 +45,7 @@ * - Rearrange window copies in inflate_fast() for speed and simplification * - Unroll last copy for window match in inflate_fast() * - Use local copies of window variables in inflate_fast() for speed - * - Pull out common write == 0 case for speed in inflate_fast() + * - Pull out common wnext == 0 case for speed in inflate_fast() * - Make op and len in inflate_fast() unsigned for consistency * - Add FAR to lcode and dcode declarations in inflate_fast() * - Simplified bad distance check in inflate_fast() @@ -117,28 +117,52 @@ z_streamp strm; state->head = Z_NULL; state->wsize = 0; state->whave = 0; - state->write = 0; + state->wnext = 0; state->hold = 0; state->bits = 0; state->lencode = state->distcode = state->next = state->codes; + state->sane = 1; + state->back = -1; Tracev((stderr, "inflate: reset\n")); return Z_OK; } -int ZEXPORT inflatePrime(strm, bits, value) +int ZEXPORT inflateReset2(strm, windowBits) z_streamp strm; -int bits; -int value; +int windowBits; { + int wrap; struct inflate_state FAR *state; + /* get the state */ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; state = (struct inflate_state FAR *)strm->state; - if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR; - value &= (1L << bits) - 1; - state->hold += value << state->bits; - state->bits += bits; - return Z_OK; + + /* extract wrap request from windowBits parameter */ + if (windowBits < 0) { + wrap = 0; + windowBits = -windowBits; + } + else { + wrap = (windowBits >> 4) + 1; +#ifdef GUNZIP + if (windowBits < 48) + windowBits &= 15; +#endif + } + + /* set number of window bits, free window if different */ + if (windowBits && (windowBits < 8 || windowBits > 15)) + return Z_STREAM_ERROR; + if (state->window != Z_NULL && state->wbits != (unsigned)windowBits) { + ZFREE(strm, state->window); + state->window = Z_NULL; + } + + /* update state and reset the rest of it */ + state->wrap = wrap; + state->wbits = (unsigned)windowBits; + return inflateReset(strm); } int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size) @@ -147,6 +171,7 @@ int windowBits; const char *version; int stream_size; { + int ret; struct inflate_state FAR *state; if (version == Z_NULL || version[0] != ZLIB_VERSION[0] || @@ -164,24 +189,13 @@ int stream_size; if (state == Z_NULL) return Z_MEM_ERROR; Tracev((stderr, "inflate: allocated\n")); strm->state = (struct internal_state FAR *)state; - if (windowBits < 0) { - state->wrap = 0; - windowBits = -windowBits; - } - else { - state->wrap = (windowBits >> 4) + 1; -#ifdef GUNZIP - if (windowBits < 48) windowBits &= 15; -#endif - } - if (windowBits < 8 || windowBits > 15) { + state->window = Z_NULL; + ret = inflateReset2(strm, windowBits); + if (ret != Z_OK) { ZFREE(strm, state); strm->state = Z_NULL; - return Z_STREAM_ERROR; } - state->wbits = (unsigned)windowBits; - state->window = Z_NULL; - return inflateReset(strm); + return ret; } int ZEXPORT inflateInit_(strm, version, stream_size) @@ -192,6 +206,27 @@ int stream_size; return inflateInit2_(strm, DEF_WBITS, version, stream_size); } +int ZEXPORT inflatePrime(strm, bits, value) +z_streamp strm; +int bits; +int value; +{ + struct inflate_state FAR *state; + + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + state = (struct inflate_state FAR *)strm->state; + if (bits < 0) { + state->hold = 0; + state->bits = 0; + return Z_OK; + } + if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR; + value &= (1L << bits) - 1; + state->hold += value << state->bits; + state->bits += bits; + return Z_OK; +} + /* Return state with length and distance decoding tables and index sizes set to fixed code decoding. Normally this returns fixed tables from inffixed.h. @@ -340,7 +375,7 @@ unsigned out; /* if window not in use yet, initialize */ if (state->wsize == 0) { state->wsize = 1U << state->wbits; - state->write = 0; + state->wnext = 0; state->whave = 0; } @@ -348,22 +383,22 @@ unsigned out; copy = out - strm->avail_out; if (copy >= state->wsize) { zmemcpy(state->window, strm->next_out - state->wsize, state->wsize); - state->write = 0; + state->wnext = 0; state->whave = state->wsize; } else { - dist = state->wsize - state->write; + dist = state->wsize - state->wnext; if (dist > copy) dist = copy; - zmemcpy(state->window + state->write, strm->next_out - copy, dist); + zmemcpy(state->window + state->wnext, strm->next_out - copy, dist); copy -= dist; if (copy) { zmemcpy(state->window, strm->next_out - copy, copy); - state->write = copy; + state->wnext = copy; state->whave = state->wsize; } else { - state->write += dist; - if (state->write == state->wsize) state->write = 0; + state->wnext += dist; + if (state->wnext == state->wsize) state->wnext = 0; if (state->whave < state->wsize) state->whave += dist; } } @@ -564,7 +599,7 @@ int flush; unsigned in, out; /* save starting available input and output */ unsigned copy; /* number of stored or match bytes to copy */ unsigned char FAR *from; /* where to copy match bytes from */ - code this; /* current decoding table entry */ + code here; /* current decoding table entry */ code last; /* parent table entry */ unsigned len; /* length to copy for repeats, bits to drop */ int ret; /* return code */ @@ -619,7 +654,9 @@ int flush; } DROPBITS(4); len = BITS(4) + 8; - if (len > state->wbits) { + if (state->wbits == 0) + state->wbits = len; + else if (len > state->wbits) { strm->msg = (char *)"invalid window size"; state->mode = BAD; break; @@ -771,7 +808,7 @@ int flush; strm->adler = state->check = adler32(0L, Z_NULL, 0); state->mode = TYPE; case TYPE: - if (flush == Z_BLOCK) goto inf_leave; + if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave; case TYPEDO: if (state->last) { BYTEBITS(); @@ -791,7 +828,11 @@ int flush; fixedtables(state); Tracev((stderr, "inflate: fixed codes block%s\n", state->last ? " (last)" : "")); - state->mode = LEN; /* decode codes */ + state->mode = LEN_; /* decode codes */ + if (flush == Z_TREES) { + DROPBITS(2); + goto inf_leave; + } break; case 2: /* dynamic block */ Tracev((stderr, "inflate: dynamic codes block%s\n", @@ -816,6 +857,9 @@ int flush; Tracev((stderr, "inflate: stored length %u\n", state->length)); INITBITS(); + state->mode = COPY_; + if (flush == Z_TREES) goto inf_leave; + case COPY_: state->mode = COPY; case COPY: copy = state->length; @@ -876,19 +920,19 @@ int flush; case CODELENS: while (state->have < state->nlen + state->ndist) { for (;;) { - this = state->lencode[BITS(state->lenbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if (this.val < 16) { - NEEDBITS(this.bits); - DROPBITS(this.bits); - state->lens[state->have++] = this.val; + if (here.val < 16) { + NEEDBITS(here.bits); + DROPBITS(here.bits); + state->lens[state->have++] = here.val; } else { - if (this.val == 16) { - NEEDBITS(this.bits + 2); - DROPBITS(this.bits); + if (here.val == 16) { + NEEDBITS(here.bits + 2); + DROPBITS(here.bits); if (state->have == 0) { strm->msg = (char *)"invalid bit length repeat"; state->mode = BAD; @@ -898,16 +942,16 @@ int flush; copy = 3 + BITS(2); DROPBITS(2); } - else if (this.val == 17) { - NEEDBITS(this.bits + 3); - DROPBITS(this.bits); + else if (here.val == 17) { + NEEDBITS(here.bits + 3); + DROPBITS(here.bits); len = 0; copy = 3 + BITS(3); DROPBITS(3); } else { - NEEDBITS(this.bits + 7); - DROPBITS(this.bits); + NEEDBITS(here.bits + 7); + DROPBITS(here.bits); len = 0; copy = 11 + BITS(7); DROPBITS(7); @@ -925,7 +969,16 @@ int flush; /* handle error breaks in while */ if (state->mode == BAD) break; - /* build code tables */ + /* check for end-of-block code (better have one) */ + if (state->lens[256] == 0) { + strm->msg = (char *)"invalid code -- missing end-of-block"; + state->mode = BAD; + break; + } + + /* build code tables -- note: do not change the lenbits or distbits + values here (9 and 6) without reading the comments in inftrees.h + concerning the ENOUGH constants, which depend on those values */ state->next = state->codes; state->lencode = (code const FAR *)(state->next); state->lenbits = 9; @@ -946,88 +999,102 @@ int flush; break; } Tracev((stderr, "inflate: codes ok\n")); + state->mode = LEN_; + if (flush == Z_TREES) goto inf_leave; + case LEN_: state->mode = LEN; case LEN: if (have >= 6 && left >= 258) { RESTORE(); inflate_fast(strm, out); LOAD(); + if (state->mode == TYPE) + state->back = -1; break; } + state->back = 0; for (;;) { - this = state->lencode[BITS(state->lenbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->lencode[BITS(state->lenbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if (this.op && (this.op & 0xf0) == 0) { - last = this; + if (here.op && (here.op & 0xf0) == 0) { + last = here; for (;;) { - this = state->lencode[last.val + + here = state->lencode[last.val + (BITS(last.bits + last.op) >> last.bits)]; - if ((unsigned)(last.bits + this.bits) <= bits) break; + if ((unsigned)(last.bits + here.bits) <= bits) break; PULLBYTE(); } DROPBITS(last.bits); + state->back += last.bits; } - DROPBITS(this.bits); - state->length = (unsigned)this.val; - if ((int)(this.op) == 0) { - Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ? + DROPBITS(here.bits); + state->back += here.bits; + state->length = (unsigned)here.val; + if ((int)(here.op) == 0) { + Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? "inflate: literal '%c'\n" : - "inflate: literal 0x%02x\n", this.val)); + "inflate: literal 0x%02x\n", here.val)); state->mode = LIT; break; } - if (this.op & 32) { + if (here.op & 32) { Tracevv((stderr, "inflate: end of block\n")); + state->back = -1; state->mode = TYPE; break; } - if (this.op & 64) { + if (here.op & 64) { strm->msg = (char *)"invalid literal/length code"; state->mode = BAD; break; } - state->extra = (unsigned)(this.op) & 15; + state->extra = (unsigned)(here.op) & 15; state->mode = LENEXT; case LENEXT: if (state->extra) { NEEDBITS(state->extra); state->length += BITS(state->extra); DROPBITS(state->extra); + state->back += state->extra; } Tracevv((stderr, "inflate: length %u\n", state->length)); + state->was = state->length; state->mode = DIST; case DIST: for (;;) { - this = state->distcode[BITS(state->distbits)]; - if ((unsigned)(this.bits) <= bits) break; + here = state->distcode[BITS(state->distbits)]; + if ((unsigned)(here.bits) <= bits) break; PULLBYTE(); } - if ((this.op & 0xf0) == 0) { - last = this; + if ((here.op & 0xf0) == 0) { + last = here; for (;;) { - this = state->distcode[last.val + + here = state->distcode[last.val + (BITS(last.bits + last.op) >> last.bits)]; - if ((unsigned)(last.bits + this.bits) <= bits) break; + if ((unsigned)(last.bits + here.bits) <= bits) break; PULLBYTE(); } DROPBITS(last.bits); + state->back += last.bits; } - DROPBITS(this.bits); - if (this.op & 64) { + DROPBITS(here.bits); + state->back += here.bits; + if (here.op & 64) { strm->msg = (char *)"invalid distance code"; state->mode = BAD; break; } - state->offset = (unsigned)this.val; - state->extra = (unsigned)(this.op) & 15; + state->offset = (unsigned)here.val; + state->extra = (unsigned)(here.op) & 15; state->mode = DISTEXT; case DISTEXT: if (state->extra) { NEEDBITS(state->extra); state->offset += BITS(state->extra); DROPBITS(state->extra); + state->back += state->extra; } #ifdef INFLATE_STRICT if (state->offset > state->dmax) { @@ -1036,11 +1103,6 @@ int flush; break; } #endif - if (state->offset > state->whave + out - left) { - strm->msg = (char *)"invalid distance too far back"; - state->mode = BAD; - break; - } Tracevv((stderr, "inflate: distance %u\n", state->offset)); state->mode = MATCH; case MATCH: @@ -1048,12 +1110,32 @@ int flush; copy = out - left; if (state->offset > copy) { /* copy from window */ copy = state->offset - copy; - if (copy > state->write) { - copy -= state->write; + if (copy > state->whave) { + if (state->sane) { + strm->msg = (char *)"invalid distance too far back"; + state->mode = BAD; + break; + } +#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR + Trace((stderr, "inflate.c too far\n")); + copy -= state->whave; + if (copy > state->length) copy = state->length; + if (copy > left) copy = left; + left -= copy; + state->length -= copy; + do { + *put++ = 0; + } while (--copy); + if (state->length == 0) state->mode = LEN; + break; +#endif + } + if (copy > state->wnext) { + copy -= state->wnext; from = state->window + (state->wsize - copy); } else - from = state->window + (state->write - copy); + from = state->window + (state->wnext - copy); if (copy > state->length) copy = state->length; } else { /* copy from output */ @@ -1146,7 +1228,8 @@ int flush; strm->adler = state->check = UPDATE(state->check, strm->next_out - out, out); strm->data_type = state->bits + (state->last ? 64 : 0) + - (state->mode == TYPE ? 128 : 0); + (state->mode == TYPE ? 128 : 0) + + (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0); if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK) ret = Z_BUF_ERROR; return ret; @@ -1367,3 +1450,31 @@ z_streamp source; return Z_OK; } +int ZEXPORT inflateUndermine(strm, subvert) +z_streamp strm; +int subvert; +{ + struct inflate_state FAR *state; + + if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; + state = (struct inflate_state FAR *)strm->state; + state->sane = !subvert; +#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR + return Z_OK; +#else + state->sane = 1; + return Z_DATA_ERROR; +#endif +} + +long ZEXPORT inflateMark(strm) +z_streamp strm; +{ + struct inflate_state FAR *state; + + if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16; + state = (struct inflate_state FAR *)strm->state; + return ((long)(state->back) << 16) + + (state->mode == COPY ? state->length : + (state->mode == MATCH ? state->was - state->length : 0)); +} diff --git a/ExternalLibs/glpng/zlib/inflate.h b/ExternalLibs/glpng/zlib/inflate.h index 07bd3e7..95f4986 100644 --- a/ExternalLibs/glpng/zlib/inflate.h +++ b/ExternalLibs/glpng/zlib/inflate.h @@ -1,5 +1,5 @@ /* inflate.h -- internal inflate state definition - * Copyright (C) 1995-2004 Mark Adler + * Copyright (C) 1995-2009 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -32,11 +32,13 @@ typedef enum { TYPE, /* i: waiting for type bits, including last-flag bit */ TYPEDO, /* i: same, but skip check to exit inflate on new block */ STORED, /* i: waiting for stored size (length and complement) */ + COPY_, /* i/o: same as COPY below, but only first time in */ COPY, /* i/o: waiting for input or output to copy stored block */ TABLE, /* i: waiting for dynamic block table lengths */ LENLENS, /* i: waiting for code length code lengths */ CODELENS, /* i: waiting for length/lit and distance code lengths */ - LEN, /* i: waiting for length/lit code */ + LEN_, /* i: same as LEN below, but only first time in */ + LEN, /* i: waiting for length/lit/eob code */ LENEXT, /* i: waiting for length extra bits */ DIST, /* i: waiting for distance code */ DISTEXT, /* i: waiting for distance extra bits */ @@ -53,19 +55,21 @@ typedef enum { /* State transitions between above modes - - (most modes can go to the BAD or MEM mode -- not shown for clarity) + (most modes can go to BAD or MEM on error -- not shown for clarity) Process header: - HEAD -> (gzip) or (zlib) - (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME - NAME -> COMMENT -> HCRC -> TYPE + HEAD -> (gzip) or (zlib) or (raw) + (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME -> COMMENT -> + HCRC -> TYPE (zlib) -> DICTID or TYPE DICTID -> DICT -> TYPE + (raw) -> TYPEDO Read deflate blocks: - TYPE -> STORED or TABLE or LEN or CHECK - STORED -> COPY -> TYPE - TABLE -> LENLENS -> CODELENS -> LEN - Read deflate codes: + TYPE -> TYPEDO -> STORED or TABLE or LEN_ or CHECK + STORED -> COPY_ -> COPY -> TYPE + TABLE -> LENLENS -> CODELENS -> LEN_ + LEN_ -> LEN + Read deflate codes in fixed or dynamic block: LEN -> LENEXT or LIT or TYPE LENEXT -> DIST -> DISTEXT -> MATCH -> LEN LIT -> LEN @@ -73,7 +77,7 @@ typedef enum { CHECK -> LENGTH -> DONE */ -/* state maintained between inflate() calls. Approximately 7K bytes. */ +/* state maintained between inflate() calls. Approximately 10K bytes. */ struct inflate_state { inflate_mode mode; /* current inflate mode */ int last; /* true if processing last block */ @@ -88,7 +92,7 @@ struct inflate_state { unsigned wbits; /* log base 2 of requested window size */ unsigned wsize; /* window size or zero if not using window */ unsigned whave; /* valid bytes in the window */ - unsigned write; /* window write index */ + unsigned wnext; /* window write index */ unsigned char FAR *window; /* allocated sliding window, if needed */ /* bit accumulator */ unsigned long hold; /* input bit accumulator */ @@ -112,4 +116,7 @@ struct inflate_state { unsigned short lens[320]; /* temporary storage for code lengths */ unsigned short work[288]; /* work area for code table building */ code codes[ENOUGH]; /* space for code tables */ + int sane; /* if false, allow invalid distance too far */ + int back; /* bits back of last unprocessed length/lit */ + unsigned was; /* initial length of match */ }; diff --git a/ExternalLibs/glpng/zlib/inftrees.c b/ExternalLibs/glpng/zlib/inftrees.c index ecf8a99..11e9c52 100644 --- a/ExternalLibs/glpng/zlib/inftrees.c +++ b/ExternalLibs/glpng/zlib/inftrees.c @@ -1,5 +1,5 @@ /* inftrees.c -- generate Huffman trees for efficient decoding - * Copyright (C) 1995-2005 Mark Adler + * Copyright (C) 1995-2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -9,7 +9,7 @@ #define MAXBITS 15 const char inflate_copyright[] = - " inflate 1.2.3 Copyright 1995-2005 Mark Adler "; + " inflate 1.2.5 Copyright 1995-2010 Mark Adler "; /* If you use the zlib library in a product, an acknowledgment is welcome in the documentation of your product. If for some reason you cannot @@ -29,7 +29,7 @@ const char inflate_copyright[] = table index bits. It will differ if the request is greater than the longest code or if it is less than the shortest code. */ -int inflate_table(type, lens, codes, table, bits, work) +int ZLIB_INTERNAL inflate_table(type, lens, codes, table, bits, work) codetype type; unsigned short FAR *lens; unsigned codes; @@ -50,7 +50,7 @@ unsigned short FAR *work; unsigned fill; /* index for replicating entries */ unsigned low; /* low bits for current root entry */ unsigned mask; /* mask for low root bits */ - code this; /* table entry for duplication */ + code here; /* table entry for duplication */ code FAR *next; /* next available space in table */ const unsigned short FAR *base; /* base value table to use */ const unsigned short FAR *extra; /* extra bits table to use */ @@ -62,7 +62,7 @@ unsigned short FAR *work; 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; static const unsigned short lext[31] = { /* Length codes 257..285 extra */ 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, - 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 201, 196}; + 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 73, 195}; static const unsigned short dbase[32] = { /* Distance codes 0..29 base */ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, @@ -115,15 +115,15 @@ unsigned short FAR *work; if (count[max] != 0) break; if (root > max) root = max; if (max == 0) { /* no symbols to code at all */ - this.op = (unsigned char)64; /* invalid code marker */ - this.bits = (unsigned char)1; - this.val = (unsigned short)0; - *(*table)++ = this; /* make a table to force an error */ - *(*table)++ = this; + here.op = (unsigned char)64; /* invalid code marker */ + here.bits = (unsigned char)1; + here.val = (unsigned short)0; + *(*table)++ = here; /* make a table to force an error */ + *(*table)++ = here; *bits = 1; return 0; /* no symbols, but wait for decoding to report error */ } - for (min = 1; min <= MAXBITS; min++) + for (min = 1; min < max; min++) if (count[min] != 0) break; if (root < min) root = min; @@ -166,11 +166,10 @@ unsigned short FAR *work; entered in the tables. used keeps track of how many table entries have been allocated from the - provided *table space. It is checked when a LENS table is being made - against the space in *table, ENOUGH, minus the maximum space needed by - the worst case distance code, MAXD. This should never happen, but the - sufficiency of ENOUGH has not been proven exhaustively, hence the check. - This assumes that when type == LENS, bits == 9. + provided *table space. It is checked for LENS and DIST tables against + the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in + the initial root table size constants. See the comments in inftrees.h + for more information. sym increments through all symbols, and the loop terminates when all codes of length max, i.e. all codes, have been processed. This @@ -209,24 +208,25 @@ unsigned short FAR *work; mask = used - 1; /* mask for comparing low */ /* check available table space */ - if (type == LENS && used >= ENOUGH - MAXD) + if ((type == LENS && used >= ENOUGH_LENS) || + (type == DISTS && used >= ENOUGH_DISTS)) return 1; /* process all codes and make table entries */ for (;;) { /* create table entry */ - this.bits = (unsigned char)(len - drop); + here.bits = (unsigned char)(len - drop); if ((int)(work[sym]) < end) { - this.op = (unsigned char)0; - this.val = work[sym]; + here.op = (unsigned char)0; + here.val = work[sym]; } else if ((int)(work[sym]) > end) { - this.op = (unsigned char)(extra[work[sym]]); - this.val = base[work[sym]]; + here.op = (unsigned char)(extra[work[sym]]); + here.val = base[work[sym]]; } else { - this.op = (unsigned char)(32 + 64); /* end of block */ - this.val = 0; + here.op = (unsigned char)(32 + 64); /* end of block */ + here.val = 0; } /* replicate for those indices with low len bits equal to huff */ @@ -235,7 +235,7 @@ unsigned short FAR *work; min = fill; /* save offset to next table */ do { fill -= incr; - next[(huff >> drop) + fill] = this; + next[(huff >> drop) + fill] = here; } while (fill != 0); /* backwards increment the len-bit code huff */ @@ -277,7 +277,8 @@ unsigned short FAR *work; /* check for enough space */ used += 1U << curr; - if (type == LENS && used >= ENOUGH - MAXD) + if ((type == LENS && used >= ENOUGH_LENS) || + (type == DISTS && used >= ENOUGH_DISTS)) return 1; /* point entry in root table to sub-table */ @@ -295,20 +296,20 @@ unsigned short FAR *work; through high index bits. When the current sub-table is filled, the loop drops back to the root table to fill in any remaining entries there. */ - this.op = (unsigned char)64; /* invalid code marker */ - this.bits = (unsigned char)(len - drop); - this.val = (unsigned short)0; + here.op = (unsigned char)64; /* invalid code marker */ + here.bits = (unsigned char)(len - drop); + here.val = (unsigned short)0; while (huff != 0) { /* when done with sub-table, drop back to root table */ if (drop != 0 && (huff & mask) != low) { drop = 0; len = root; next = *table; - this.bits = (unsigned char)len; + here.bits = (unsigned char)len; } /* put invalid code marker in table */ - next[huff >> drop] = this; + next[huff >> drop] = here; /* backwards increment the len-bit code huff */ incr = 1U << (len - 1); @@ -327,4 +328,3 @@ unsigned short FAR *work; *bits = root; return 0; } - diff --git a/ExternalLibs/glpng/zlib/inftrees.h b/ExternalLibs/glpng/zlib/inftrees.h index b1104c8..baa53a0 100644 --- a/ExternalLibs/glpng/zlib/inftrees.h +++ b/ExternalLibs/glpng/zlib/inftrees.h @@ -1,5 +1,5 @@ /* inftrees.h -- header to use inftrees.c - * Copyright (C) 1995-2005 Mark Adler + * Copyright (C) 1995-2005, 2010 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -35,21 +35,28 @@ typedef struct { 01000000 - invalid code */ -/* Maximum size of dynamic tree. The maximum found in a long but non- - exhaustive search was 1444 code structures (852 for length/literals - and 592 for distances, the latter actually the result of an - exhaustive search). The true maximum is not known, but the value - below is more than safe. */ -#define ENOUGH 2048 -#define MAXD 592 +/* Maximum size of the dynamic table. The maximum number of code structures is + 1444, which is the sum of 852 for literal/length codes and 592 for distance + codes. These values were found by exhaustive searches using the program + examples/enough.c found in the zlib distribtution. The arguments to that + program are the number of symbols, the initial root table size, and the + maximum bit length of a code. "enough 286 9 15" for literal/length codes + returns returns 852, and "enough 30 6 15" for distance codes returns 592. + The initial root table size (9 or 6) is found in the fifth argument of the + inflate_table() calls in inflate.c and infback.c. If the root table size is + changed, then these maximum sizes would be need to be recalculated and + updated. */ +#define ENOUGH_LENS 852 +#define ENOUGH_DISTS 592 +#define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS) -/* Type of code to build for inftable() */ +/* Type of code to build for inflate_table() */ typedef enum { CODES, LENS, DISTS } codetype; -extern int inflate_table OF((codetype type, unsigned short FAR *lens, +int ZLIB_INTERNAL inflate_table OF((codetype type, unsigned short FAR *lens, unsigned codes, code FAR * FAR *table, unsigned FAR *bits, unsigned short FAR *work)); diff --git a/ExternalLibs/glpng/zlib/minigzip.c b/ExternalLibs/glpng/zlib/minigzip.c deleted file mode 100644 index a68f570..0000000 --- a/ExternalLibs/glpng/zlib/minigzip.c +++ /dev/null @@ -1,323 +0,0 @@ -/* minigzip.c -- simulate gzip using the zlib compression library - * Copyright (C) 1995-2005 Jean-loup Gailly. - * For conditions of distribution and use, see copyright notice in zlib.h - */ - -/* - * minigzip is a minimal implementation of the gzip utility. This is - * only an example of using zlib and isn't meant to replace the - * full-featured gzip. No attempt is made to deal with file systems - * limiting names to 14 or 8+3 characters, etc... Error checking is - * very limited. So use minigzip only for testing; use gzip for the - * real thing. On MSDOS, use only on file names without extension - * or in pipe mode. - */ - -/* @(#) $Id$ */ - -#include -#include "zlib.h" - -#ifdef STDC -# include -# include -#endif - -#ifdef USE_MMAP -# include -# include -# include -#endif - -#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__) -# include -# include -# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY) -#else -# define SET_BINARY_MODE(file) -#endif - -#ifdef VMS -# define unlink delete -# define GZ_SUFFIX "-gz" -#endif -#ifdef RISCOS -# define unlink remove -# define GZ_SUFFIX "-gz" -# define fileno(file) file->__file -#endif -#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os -# include /* for fileno */ -#endif - -#ifndef WIN32 /* unlink already in stdio.h for WIN32 */ - extern int unlink OF((const char *)); -#endif - -#ifndef GZ_SUFFIX -# define GZ_SUFFIX ".gz" -#endif -#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1) - -#define BUFLEN 16384 -#define MAX_NAME_LEN 1024 - -#ifdef MAXSEG_64K -# define local static - /* Needed for systems with limitation on stack size. */ -#else -# define local -#endif - -char *prog; - -void error OF((const char *msg)); -void gz_compress OF((FILE *in, gzFile out)); -#ifdef USE_MMAP -int gz_compress_mmap OF((FILE *in, gzFile out)); -#endif -void gz_uncompress OF((gzFile in, FILE *out)); -void file_compress OF((char *file, char *mode)); -void file_uncompress OF((char *file)); -int main OF((int argc, char *argv[])); - -/* =========================================================================== - * Display error message and exit - */ -void error(msg) - const char *msg; -{ - fprintf(stderr, "%s: %s\n", prog, msg); - exit(1); -} - -/* =========================================================================== - * Compress input to output then close both files. - */ - -void gz_compress(in, out) - FILE *in; - gzFile out; -{ - local char buf[BUFLEN]; - int len; - int err; - -#ifdef USE_MMAP - /* Try first compressing with mmap. If mmap fails (minigzip used in a - * pipe), use the normal fread loop. - */ - if (gz_compress_mmap(in, out) == Z_OK) return; -#endif - for (;;) { - len = (int)fread(buf, 1, sizeof(buf), in); - if (ferror(in)) { - perror("fread"); - exit(1); - } - if (len == 0) break; - - if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err)); - } - fclose(in); - if (gzclose(out) != Z_OK) error("failed gzclose"); -} - -#ifdef USE_MMAP /* MMAP version, Miguel Albrecht */ - -/* Try compressing the input file at once using mmap. Return Z_OK if - * if success, Z_ERRNO otherwise. - */ -int gz_compress_mmap(in, out) - FILE *in; - gzFile out; -{ - int len; - int err; - int ifd = fileno(in); - caddr_t buf; /* mmap'ed buffer for the entire input file */ - off_t buf_len; /* length of the input file */ - struct stat sb; - - /* Determine the size of the file, needed for mmap: */ - if (fstat(ifd, &sb) < 0) return Z_ERRNO; - buf_len = sb.st_size; - if (buf_len <= 0) return Z_ERRNO; - - /* Now do the actual mmap: */ - buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0); - if (buf == (caddr_t)(-1)) return Z_ERRNO; - - /* Compress the whole file at once: */ - len = gzwrite(out, (char *)buf, (unsigned)buf_len); - - if (len != (int)buf_len) error(gzerror(out, &err)); - - munmap(buf, buf_len); - fclose(in); - if (gzclose(out) != Z_OK) error("failed gzclose"); - return Z_OK; -} -#endif /* USE_MMAP */ - -/* =========================================================================== - * Uncompress input to output then close both files. - */ -void gz_uncompress(in, out) - gzFile in; - FILE *out; -{ - local char buf[BUFLEN]; - int len; - int err; - - for (;;) { - len = gzread(in, buf, sizeof(buf)); - if (len < 0) error (gzerror(in, &err)); - if (len == 0) break; - - if ((int)fwrite(buf, 1, (unsigned)len, out) != len) { - error("failed fwrite"); - } - } - if (fclose(out)) error("failed fclose"); - - if (gzclose(in) != Z_OK) error("failed gzclose"); -} - - -/* =========================================================================== - * Compress the given file: create a corresponding .gz file and remove the - * original. - */ -void file_compress(file, mode) - char *file; - char *mode; -{ - local char outfile[MAX_NAME_LEN]; - FILE *in; - gzFile out; - - strcpy(outfile, file); - strcat(outfile, GZ_SUFFIX); - - in = fopen(file, "rb"); - if (in == NULL) { - perror(file); - exit(1); - } - out = gzopen(outfile, mode); - if (out == NULL) { - fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile); - exit(1); - } - gz_compress(in, out); - - unlink(file); -} - - -/* =========================================================================== - * Uncompress the given file and remove the original. - */ -void file_uncompress(file) - char *file; -{ - local char buf[MAX_NAME_LEN]; - char *infile, *outfile; - FILE *out; - gzFile in; - uInt len = (uInt)strlen(file); - - strcpy(buf, file); - - if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) { - infile = file; - outfile = buf; - outfile[len-3] = '\0'; - } else { - outfile = file; - infile = buf; - strcat(infile, GZ_SUFFIX); - } - in = gzopen(infile, "rb"); - if (in == NULL) { - fprintf(stderr, "%s: can't gzopen %s\n", prog, infile); - exit(1); - } - out = fopen(outfile, "wb"); - if (out == NULL) { - perror(file); - exit(1); - } - - gz_uncompress(in, out); - - unlink(infile); -} - - -/* =========================================================================== - * Usage: minigzip [-d] [-f] [-h] [-r] [-1 to -9] [files...] - * -d : decompress - * -f : compress with Z_FILTERED - * -h : compress with Z_HUFFMAN_ONLY - * -r : compress with Z_RLE - * -1 to -9 : compression level - */ - -int main(argc, argv) - int argc; - char *argv[]; -{ - int uncompr = 0; - gzFile file; - char outmode[20]; - - strcpy(outmode, "wb6 "); - - prog = argv[0]; - argc--, argv++; - - while (argc > 0) { - if (strcmp(*argv, "-d") == 0) - uncompr = 1; - else if (strcmp(*argv, "-f") == 0) - outmode[3] = 'f'; - else if (strcmp(*argv, "-h") == 0) - outmode[3] = 'h'; - else if (strcmp(*argv, "-r") == 0) - outmode[3] = 'R'; - else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' && - (*argv)[2] == 0) - outmode[2] = (*argv)[1]; - else - break; - argc--, argv++; - } - if (outmode[3] == ' ') - outmode[3] = 0; - if (argc == 0) { - SET_BINARY_MODE(stdin); - SET_BINARY_MODE(stdout); - if (uncompr) { - file = gzdopen(fileno(stdin), "rb"); - if (file == NULL) error("can't gzdopen stdin"); - gz_uncompress(file, stdout); - } else { - file = gzdopen(fileno(stdout), outmode); - if (file == NULL) error("can't gzdopen stdout"); - gz_compress(stdin, file); - } - } else { - do { - if (uncompr) { - file_uncompress(*argv); - } else { - file_compress(*argv, outmode); - } - } while (argv++, --argc); - } - return 0; -} - diff --git a/ExternalLibs/glpng/zlib/trees.c b/ExternalLibs/glpng/zlib/trees.c index 379b2bd..56e9bb1 100644 --- a/ExternalLibs/glpng/zlib/trees.c +++ b/ExternalLibs/glpng/zlib/trees.c @@ -1,5 +1,6 @@ /* trees.c -- output deflated data using Huffman coding - * Copyright (C) 1995-2005 Jean-loup Gailly + * Copyright (C) 1995-2010 Jean-loup Gailly + * detect_data_type() function provided freely by Cosmin Truta, 2006 * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -152,7 +153,7 @@ local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes, int blcodes)); local void compress_block OF((deflate_state *s, ct_data *ltree, ct_data *dtree)); -local void set_data_type OF((deflate_state *s)); +local int detect_data_type OF((deflate_state *s)); local unsigned bi_reverse OF((unsigned value, int length)); local void bi_windup OF((deflate_state *s)); local void bi_flush OF((deflate_state *s)); @@ -203,12 +204,12 @@ local void send_bits(s, value, length) * unused bits in value. */ if (s->bi_valid > (int)Buf_size - length) { - s->bi_buf |= (value << s->bi_valid); + s->bi_buf |= (ush)value << s->bi_valid; put_short(s, s->bi_buf); s->bi_buf = (ush)value >> (Buf_size - s->bi_valid); s->bi_valid += length - Buf_size; } else { - s->bi_buf |= value << s->bi_valid; + s->bi_buf |= (ush)value << s->bi_valid; s->bi_valid += length; } } @@ -218,12 +219,12 @@ local void send_bits(s, value, length) { int len = length;\ if (s->bi_valid > (int)Buf_size - len) {\ int val = value;\ - s->bi_buf |= (val << s->bi_valid);\ + s->bi_buf |= (ush)val << s->bi_valid;\ put_short(s, s->bi_buf);\ s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\ s->bi_valid += len - Buf_size;\ } else {\ - s->bi_buf |= (value) << s->bi_valid;\ + s->bi_buf |= (ush)(value) << s->bi_valid;\ s->bi_valid += len;\ }\ } @@ -250,11 +251,13 @@ local void tr_static_init() if (static_init_done) return; /* For some embedded targets, global variables are not initialized: */ +#ifdef NO_INIT_GLOBAL_POINTERS static_l_desc.static_tree = static_ltree; static_l_desc.extra_bits = extra_lbits; static_d_desc.static_tree = static_dtree; static_d_desc.extra_bits = extra_dbits; static_bl_desc.extra_bits = extra_blbits; +#endif /* Initialize the mapping length (0..255) -> length code (0..28) */ length = 0; @@ -348,13 +351,14 @@ void gen_trees_header() static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5)); } - fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n"); + fprintf(header, "const uch ZLIB_INTERNAL _dist_code[DIST_CODE_LEN] = {\n"); for (i = 0; i < DIST_CODE_LEN; i++) { fprintf(header, "%2u%s", _dist_code[i], SEPARATOR(i, DIST_CODE_LEN-1, 20)); } - fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n"); + fprintf(header, + "const uch ZLIB_INTERNAL _length_code[MAX_MATCH-MIN_MATCH+1]= {\n"); for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) { fprintf(header, "%2u%s", _length_code[i], SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20)); @@ -379,7 +383,7 @@ void gen_trees_header() /* =========================================================================== * Initialize the tree data structures for a new zlib stream. */ -void _tr_init(s) +void ZLIB_INTERNAL _tr_init(s) deflate_state *s; { tr_static_init(); @@ -864,13 +868,13 @@ local void send_all_trees(s, lcodes, dcodes, blcodes) /* =========================================================================== * Send a stored block */ -void _tr_stored_block(s, buf, stored_len, eof) +void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last) deflate_state *s; charf *buf; /* input block */ ulg stored_len; /* length of input block */ - int eof; /* true if this is the last block for a file */ + int last; /* one if this is the last block for a file */ { - send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */ + send_bits(s, (STORED_BLOCK<<1)+last, 3); /* send block type */ #ifdef DEBUG s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L; s->compressed_len += (stored_len + 4) << 3; @@ -889,7 +893,7 @@ void _tr_stored_block(s, buf, stored_len, eof) * To simplify the code, we assume the worst case of last real code encoded * on one bit only. */ -void _tr_align(s) +void ZLIB_INTERNAL _tr_align(s) deflate_state *s; { send_bits(s, STATIC_TREES<<1, 3); @@ -918,11 +922,11 @@ void _tr_align(s) * Determine the best encoding for the current block: dynamic trees, static * trees or store, and output the encoded block to the zip file. */ -void _tr_flush_block(s, buf, stored_len, eof) +void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last) deflate_state *s; charf *buf; /* input block, or NULL if too old */ ulg stored_len; /* length of input block */ - int eof; /* true if this is the last block for a file */ + int last; /* one if this is the last block for a file */ { ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */ int max_blindex = 0; /* index of last bit length code of non zero freq */ @@ -931,8 +935,8 @@ void _tr_flush_block(s, buf, stored_len, eof) if (s->level > 0) { /* Check if the file is binary or text */ - if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN) - set_data_type(s); + if (s->strm->data_type == Z_UNKNOWN) + s->strm->data_type = detect_data_type(s); /* Construct the literal and distance trees */ build_tree(s, (tree_desc *)(&(s->l_desc))); @@ -978,20 +982,20 @@ void _tr_flush_block(s, buf, stored_len, eof) * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to * transform a block into a stored block. */ - _tr_stored_block(s, buf, stored_len, eof); + _tr_stored_block(s, buf, stored_len, last); #ifdef FORCE_STATIC } else if (static_lenb >= 0) { /* force static trees */ #else } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) { #endif - send_bits(s, (STATIC_TREES<<1)+eof, 3); + send_bits(s, (STATIC_TREES<<1)+last, 3); compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree); #ifdef DEBUG s->compressed_len += 3 + s->static_len; #endif } else { - send_bits(s, (DYN_TREES<<1)+eof, 3); + send_bits(s, (DYN_TREES<<1)+last, 3); send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1, max_blindex+1); compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree); @@ -1005,21 +1009,21 @@ void _tr_flush_block(s, buf, stored_len, eof) */ init_block(s); - if (eof) { + if (last) { bi_windup(s); #ifdef DEBUG s->compressed_len += 7; /* align on byte boundary */ #endif } Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3, - s->compressed_len-7*eof)); + s->compressed_len-7*last)); } /* =========================================================================== * Save the match info and tally the frequency counts. Return true if * the current block must be flushed. */ -int _tr_tally (s, dist, lc) +int ZLIB_INTERNAL _tr_tally (s, dist, lc) deflate_state *s; unsigned dist; /* distance of matched string */ unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */ @@ -1118,24 +1122,45 @@ local void compress_block(s, ltree, dtree) } /* =========================================================================== - * Set the data type to BINARY or TEXT, using a crude approximation: - * set it to Z_TEXT if all symbols are either printable characters (33 to 255) - * or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise. + * Check if the data type is TEXT or BINARY, using the following algorithm: + * - TEXT if the two conditions below are satisfied: + * a) There are no non-portable control characters belonging to the + * "black list" (0..6, 14..25, 28..31). + * b) There is at least one printable character belonging to the + * "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255). + * - BINARY otherwise. + * - The following partially-portable control characters form a + * "gray list" that is ignored in this detection algorithm: + * (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}). * IN assertion: the fields Freq of dyn_ltree are set. */ -local void set_data_type(s) +local int detect_data_type(s) deflate_state *s; { + /* black_mask is the bit mask of black-listed bytes + * set bits 0..6, 14..25, and 28..31 + * 0xf3ffc07f = binary 11110011111111111100000001111111 + */ + unsigned long black_mask = 0xf3ffc07fUL; int n; - for (n = 0; n < 9; n++) + /* Check for non-textual ("black-listed") bytes. */ + for (n = 0; n <= 31; n++, black_mask >>= 1) + if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0)) + return Z_BINARY; + + /* Check for textual ("white-listed") bytes. */ + if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0 + || s->dyn_ltree[13].Freq != 0) + return Z_TEXT; + for (n = 32; n < LITERALS; n++) if (s->dyn_ltree[n].Freq != 0) - break; - if (n == 9) - for (n = 14; n < 32; n++) - if (s->dyn_ltree[n].Freq != 0) - break; - s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY; + return Z_TEXT; + + /* There are no "black-listed" or "white-listed" bytes: + * this stream either is empty or has tolerated ("gray-listed") bytes only. + */ + return Z_BINARY; } /* =========================================================================== @@ -1217,4 +1242,3 @@ local void copy_block(s, buf, len, header) put_byte(s, *buf++); } } - diff --git a/ExternalLibs/glpng/zlib/trees.h b/ExternalLibs/glpng/zlib/trees.h index 72facf9..d35639d 100644 --- a/ExternalLibs/glpng/zlib/trees.h +++ b/ExternalLibs/glpng/zlib/trees.h @@ -70,7 +70,7 @@ local const ct_data static_dtree[D_CODES] = { {{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}} }; -const uch _dist_code[DIST_CODE_LEN] = { +const uch ZLIB_INTERNAL _dist_code[DIST_CODE_LEN] = { 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, @@ -99,7 +99,7 @@ const uch _dist_code[DIST_CODE_LEN] = { 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29 }; -const uch _length_code[MAX_MATCH-MIN_MATCH+1]= { +const uch ZLIB_INTERNAL _length_code[MAX_MATCH-MIN_MATCH+1]= { 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, diff --git a/ExternalLibs/glpng/zlib/uncompr.c b/ExternalLibs/glpng/zlib/uncompr.c index 2d3dd79..ad98be3 100644 --- a/ExternalLibs/glpng/zlib/uncompr.c +++ b/ExternalLibs/glpng/zlib/uncompr.c @@ -1,5 +1,5 @@ /* uncompr.c -- decompress a memory buffer - * Copyright (C) 1995-2003 Jean-loup Gailly. + * Copyright (C) 1995-2003, 2010 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -16,8 +16,6 @@ been saved previously by the compressor and transmitted to the decompressor by some mechanism outside the scope of this compression library.) Upon exit, destLen is the actual size of the compressed buffer. - This function can be used to decompress a whole file at once if the - input file is mmap'ed. uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if there was not enough room in the output @@ -59,4 +57,3 @@ int ZEXPORT uncompress (dest, destLen, source, sourceLen) err = inflateEnd(&stream); return err; } - diff --git a/ExternalLibs/glpng/zlib/zconf.h b/ExternalLibs/glpng/zlib/zconf.h index 03a9431..02ce56c 100644 --- a/ExternalLibs/glpng/zlib/zconf.h +++ b/ExternalLibs/glpng/zlib/zconf.h @@ -1,5 +1,5 @@ /* zconf.h -- configuration of the zlib compression library - * Copyright (C) 1995-2005 Jean-loup Gailly. + * Copyright (C) 1995-2010 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -11,52 +11,124 @@ /* * If you *really* need a unique prefix for all types and library functions, * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it. + * Even better than compiling with -DZ_PREFIX would be to use configure to set + * this permanently in zconf.h using "./configure --zprefix". */ -#ifdef Z_PREFIX -# define deflateInit_ z_deflateInit_ -# define deflate z_deflate -# define deflateEnd z_deflateEnd -# define inflateInit_ z_inflateInit_ -# define inflate z_inflate -# define inflateEnd z_inflateEnd -# define deflateInit2_ z_deflateInit2_ -# define deflateSetDictionary z_deflateSetDictionary -# define deflateCopy z_deflateCopy -# define deflateReset z_deflateReset -# define deflateParams z_deflateParams -# define deflateBound z_deflateBound -# define deflatePrime z_deflatePrime -# define inflateInit2_ z_inflateInit2_ -# define inflateSetDictionary z_inflateSetDictionary -# define inflateSync z_inflateSync -# define inflateSyncPoint z_inflateSyncPoint -# define inflateCopy z_inflateCopy -# define inflateReset z_inflateReset -# define inflateBack z_inflateBack -# define inflateBackEnd z_inflateBackEnd +#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */ + +/* all linked symbols */ +# define _dist_code z__dist_code +# define _length_code z__length_code +# define _tr_align z__tr_align +# define _tr_flush_block z__tr_flush_block +# define _tr_init z__tr_init +# define _tr_stored_block z__tr_stored_block +# define _tr_tally z__tr_tally +# define adler32 z_adler32 +# define adler32_combine z_adler32_combine +# define adler32_combine64 z_adler32_combine64 # define compress z_compress # define compress2 z_compress2 # define compressBound z_compressBound -# define uncompress z_uncompress -# define adler32 z_adler32 # define crc32 z_crc32 +# define crc32_combine z_crc32_combine +# define crc32_combine64 z_crc32_combine64 +# define deflate z_deflate +# define deflateBound z_deflateBound +# define deflateCopy z_deflateCopy +# define deflateEnd z_deflateEnd +# define deflateInit2_ z_deflateInit2_ +# define deflateInit_ z_deflateInit_ +# define deflateParams z_deflateParams +# define deflatePrime z_deflatePrime +# define deflateReset z_deflateReset +# define deflateSetDictionary z_deflateSetDictionary +# define deflateSetHeader z_deflateSetHeader +# define deflateTune z_deflateTune +# define deflate_copyright z_deflate_copyright # define get_crc_table z_get_crc_table +# define gz_error z_gz_error +# define gz_intmax z_gz_intmax +# define gz_strwinerror z_gz_strwinerror +# define gzbuffer z_gzbuffer +# define gzclearerr z_gzclearerr +# define gzclose z_gzclose +# define gzclose_r z_gzclose_r +# define gzclose_w z_gzclose_w +# define gzdirect z_gzdirect +# define gzdopen z_gzdopen +# define gzeof z_gzeof +# define gzerror z_gzerror +# define gzflush z_gzflush +# define gzgetc z_gzgetc +# define gzgets z_gzgets +# define gzoffset z_gzoffset +# define gzoffset64 z_gzoffset64 +# define gzopen z_gzopen +# define gzopen64 z_gzopen64 +# define gzprintf z_gzprintf +# define gzputc z_gzputc +# define gzputs z_gzputs +# define gzread z_gzread +# define gzrewind z_gzrewind +# define gzseek z_gzseek +# define gzseek64 z_gzseek64 +# define gzsetparams z_gzsetparams +# define gztell z_gztell +# define gztell64 z_gztell64 +# define gzungetc z_gzungetc +# define gzwrite z_gzwrite +# define inflate z_inflate +# define inflateBack z_inflateBack +# define inflateBackEnd z_inflateBackEnd +# define inflateBackInit_ z_inflateBackInit_ +# define inflateCopy z_inflateCopy +# define inflateEnd z_inflateEnd +# define inflateGetHeader z_inflateGetHeader +# define inflateInit2_ z_inflateInit2_ +# define inflateInit_ z_inflateInit_ +# define inflateMark z_inflateMark +# define inflatePrime z_inflatePrime +# define inflateReset z_inflateReset +# define inflateReset2 z_inflateReset2 +# define inflateSetDictionary z_inflateSetDictionary +# define inflateSync z_inflateSync +# define inflateSyncPoint z_inflateSyncPoint +# define inflateUndermine z_inflateUndermine +# define inflate_copyright z_inflate_copyright +# define inflate_fast z_inflate_fast +# define inflate_table z_inflate_table +# define uncompress z_uncompress # define zError z_zError +# define zcalloc z_zcalloc +# define zcfree z_zcfree +# define zlibCompileFlags z_zlibCompileFlags +# define zlibVersion z_zlibVersion -# define alloc_func z_alloc_func -# define free_func z_free_func -# define in_func z_in_func -# define out_func z_out_func +/* all zlib typedefs in zlib.h and zconf.h */ # define Byte z_Byte -# define uInt z_uInt -# define uLong z_uLong # define Bytef z_Bytef +# define alloc_func z_alloc_func # define charf z_charf +# define free_func z_free_func +# define gzFile z_gzFile +# define gz_header z_gz_header +# define gz_headerp z_gz_headerp +# define in_func z_in_func # define intf z_intf +# define out_func z_out_func +# define uInt z_uInt # define uIntf z_uIntf +# define uLong z_uLong # define uLongf z_uLongf -# define voidpf z_voidpf # define voidp z_voidp +# define voidpc z_voidpc +# define voidpf z_voidpf + +/* all zlib structs in zlib.h and zconf.h */ +# define gz_header_s z_gz_header_s +# define internal_state z_internal_state + #endif #if defined(__MSDOS__) && !defined(MSDOS) @@ -284,49 +356,73 @@ typedef uLong FAR uLongf; typedef Byte *voidp; #endif -#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */ -# include /* for off_t */ -# include /* for SEEK_* and off_t */ -# ifdef VMS -# include /* for off_t */ -# endif -# define z_off_t off_t +#ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */ +# define Z_HAVE_UNISTD_H #endif + +#ifdef STDC +# include /* for off_t */ +#endif + +/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and + * "#define _LARGEFILE64_SOURCE 1" as requesting 64-bit operations, (even + * though the former does not conform to the LFS document), but considering + * both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as + * equivalently requesting no 64-bit operations + */ +#if -_LARGEFILE64_SOURCE - -1 == 1 +# undef _LARGEFILE64_SOURCE +#endif + +#if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE) +# include /* for SEEK_* and off_t */ +# ifdef VMS +# include /* for off_t */ +# endif +# ifndef z_off_t +# define z_off_t off_t +# endif +#endif + #ifndef SEEK_SET # define SEEK_SET 0 /* Seek from beginning of file. */ # define SEEK_CUR 1 /* Seek from current position. */ # define SEEK_END 2 /* Set file pointer to EOF plus "offset" */ #endif + #ifndef z_off_t # define z_off_t long #endif +#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 +# define z_off64_t off64_t +#else +# define z_off64_t z_off_t +#endif + #if defined(__OS400__) # define NO_vsnprintf #endif #if defined(__MVS__) # define NO_vsnprintf -# ifdef FAR -# undef FAR -# endif #endif /* MVS linker does not support external names larger than 8 bytes */ #if defined(__MVS__) -# pragma map(deflateInit_,"DEIN") -# pragma map(deflateInit2_,"DEIN2") -# pragma map(deflateEnd,"DEEND") -# pragma map(deflateBound,"DEBND") -# pragma map(inflateInit_,"ININ") -# pragma map(inflateInit2_,"ININ2") -# pragma map(inflateEnd,"INEND") -# pragma map(inflateSync,"INSY") -# pragma map(inflateSetDictionary,"INSEDI") -# pragma map(compressBound,"CMBND") -# pragma map(inflate_table,"INTABL") -# pragma map(inflate_fast,"INFA") -# pragma map(inflate_copyright,"INCOPY") + #pragma map(deflateInit_,"DEIN") + #pragma map(deflateInit2_,"DEIN2") + #pragma map(deflateEnd,"DEEND") + #pragma map(deflateBound,"DEBND") + #pragma map(inflateInit_,"ININ") + #pragma map(inflateInit2_,"ININ2") + #pragma map(inflateEnd,"INEND") + #pragma map(inflateSync,"INSY") + #pragma map(inflateSetDictionary,"INSEDI") + #pragma map(compressBound,"CMBND") + #pragma map(inflate_table,"INTABL") + #pragma map(inflate_fast,"INFA") + #pragma map(inflate_copyright,"INCOPY") #endif #endif /* ZCONF_H */ diff --git a/ExternalLibs/glpng/zlib/zlib.h b/ExternalLibs/glpng/zlib/zlib.h index 0228179..bfbba83 100644 --- a/ExternalLibs/glpng/zlib/zlib.h +++ b/ExternalLibs/glpng/zlib/zlib.h @@ -1,7 +1,7 @@ /* zlib.h -- interface of the 'zlib' general purpose compression library - version 1.2.3, July 18th, 2005 + version 1.2.5, April 19th, 2010 - Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler + Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages @@ -37,41 +37,44 @@ extern "C" { #endif -#define ZLIB_VERSION "1.2.3" -#define ZLIB_VERNUM 0x1230 +#define ZLIB_VERSION "1.2.5" +#define ZLIB_VERNUM 0x1250 +#define ZLIB_VER_MAJOR 1 +#define ZLIB_VER_MINOR 2 +#define ZLIB_VER_REVISION 5 +#define ZLIB_VER_SUBREVISION 0 /* - The 'zlib' compression library provides in-memory compression and - decompression functions, including integrity checks of the uncompressed - data. This version of the library supports only one compression method - (deflation) but other algorithms will be added later and will have the same - stream interface. + The 'zlib' compression library provides in-memory compression and + decompression functions, including integrity checks of the uncompressed data. + This version of the library supports only one compression method (deflation) + but other algorithms will be added later and will have the same stream + interface. - Compression can be done in a single step if the buffers are large - enough (for example if an input file is mmap'ed), or can be done by - repeated calls of the compression function. In the latter case, the - application must provide more input and/or consume the output + Compression can be done in a single step if the buffers are large enough, + or can be done by repeated calls of the compression function. In the latter + case, the application must provide more input and/or consume the output (providing more output space) before each call. - The compressed data format used by default by the in-memory functions is + The compressed data format used by default by the in-memory functions is the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped around a deflate stream, which is itself documented in RFC 1951. - The library also supports reading and writing files in gzip (.gz) format + The library also supports reading and writing files in gzip (.gz) format with an interface similar to that of stdio using the functions that start with "gz". The gzip format is different from the zlib format. gzip is a gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. - This library can optionally read and write gzip streams in memory as well. + This library can optionally read and write gzip streams in memory as well. - The zlib format was designed to be compact and fast for use in memory + The zlib format was designed to be compact and fast for use in memory and on communications channels. The gzip format was designed for single- file compression on file systems, has a larger header than zlib to maintain directory information, and uses a different, slower check method than zlib. - The library does not install any signal handler. The decoder checks - the consistency of the compressed data, so the library should never - crash even in case of corrupted input. + The library does not install any signal handler. The decoder checks + the consistency of the compressed data, so the library should never crash + even in case of corrupted input. */ typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); @@ -126,45 +129,45 @@ typedef struct gz_header_s { typedef gz_header FAR *gz_headerp; /* - The application must update next_in and avail_in when avail_in has - dropped to zero. It must update next_out and avail_out when avail_out - has dropped to zero. The application must initialize zalloc, zfree and - opaque before calling the init function. All other fields are set by the - compression library and must not be updated by the application. + The application must update next_in and avail_in when avail_in has dropped + to zero. It must update next_out and avail_out when avail_out has dropped + to zero. The application must initialize zalloc, zfree and opaque before + calling the init function. All other fields are set by the compression + library and must not be updated by the application. - The opaque value provided by the application will be passed as the first - parameter for calls of zalloc and zfree. This can be useful for custom - memory management. The compression library attaches no meaning to the + The opaque value provided by the application will be passed as the first + parameter for calls of zalloc and zfree. This can be useful for custom + memory management. The compression library attaches no meaning to the opaque value. - zalloc must return Z_NULL if there is not enough memory for the object. + zalloc must return Z_NULL if there is not enough memory for the object. If zlib is used in a multi-threaded application, zalloc and zfree must be thread safe. - On 16-bit systems, the functions zalloc and zfree must be able to allocate - exactly 65536 bytes, but will not be required to allocate more than this - if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, - pointers returned by zalloc for objects of exactly 65536 bytes *must* - have their offset normalized to zero. The default allocation function - provided by this library ensures this (see zutil.c). To reduce memory - requirements and avoid any allocation of 64K objects, at the expense of - compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h). + On 16-bit systems, the functions zalloc and zfree must be able to allocate + exactly 65536 bytes, but will not be required to allocate more than this if + the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers + returned by zalloc for objects of exactly 65536 bytes *must* have their + offset normalized to zero. The default allocation function provided by this + library ensures this (see zutil.c). To reduce memory requirements and avoid + any allocation of 64K objects, at the expense of compression ratio, compile + the library with -DMAX_WBITS=14 (see zconf.h). - The fields total_in and total_out can be used for statistics or - progress reports. After compression, total_in holds the total size of - the uncompressed data and may be saved for use in the decompressor - (particularly if the decompressor wants to decompress everything in - a single step). + The fields total_in and total_out can be used for statistics or progress + reports. After compression, total_in holds the total size of the + uncompressed data and may be saved for use in the decompressor (particularly + if the decompressor wants to decompress everything in a single step). */ /* constants */ #define Z_NO_FLUSH 0 -#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */ +#define Z_PARTIAL_FLUSH 1 #define Z_SYNC_FLUSH 2 #define Z_FULL_FLUSH 3 #define Z_FINISH 4 #define Z_BLOCK 5 +#define Z_TREES 6 /* Allowed flush values; see deflate() and inflate() below for details */ #define Z_OK 0 @@ -176,8 +179,8 @@ typedef gz_header FAR *gz_headerp; #define Z_MEM_ERROR (-4) #define Z_BUF_ERROR (-5) #define Z_VERSION_ERROR (-6) -/* Return codes for the compression/decompression functions. Negative - * values are errors, positive values are used for special but normal events. +/* Return codes for the compression/decompression functions. Negative values + * are errors, positive values are used for special but normal events. */ #define Z_NO_COMPRESSION 0 @@ -207,119 +210,140 @@ typedef gz_header FAR *gz_headerp; #define zlib_version zlibVersion() /* for compatibility with versions < 1.0.2 */ + /* basic functions */ ZEXTERN const char * ZEXPORT zlibVersion OF((void)); /* The application can compare zlibVersion and ZLIB_VERSION for consistency. - If the first character differs, the library code actually used is - not compatible with the zlib.h header file used by the application. - This check is automatically made by deflateInit and inflateInit. + If the first character differs, the library code actually used is not + compatible with the zlib.h header file used by the application. This check + is automatically made by deflateInit and inflateInit. */ /* ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); - Initializes the internal stream state for compression. The fields - zalloc, zfree and opaque must be initialized before by the caller. - If zalloc and zfree are set to Z_NULL, deflateInit updates them to - use default allocation functions. + Initializes the internal stream state for compression. The fields + zalloc, zfree and opaque must be initialized before by the caller. If + zalloc and zfree are set to Z_NULL, deflateInit updates them to use default + allocation functions. The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: - 1 gives best speed, 9 gives best compression, 0 gives no compression at - all (the input data is simply copied a block at a time). - Z_DEFAULT_COMPRESSION requests a default compromise between speed and - compression (currently equivalent to level 6). + 1 gives best speed, 9 gives best compression, 0 gives no compression at all + (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION + requests a default compromise between speed and compression (currently + equivalent to level 6). - deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not - enough memory, Z_STREAM_ERROR if level is not a valid compression level, + deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if level is not a valid compression level, or Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible - with the version assumed by the caller (ZLIB_VERSION). - msg is set to null if there is no error message. deflateInit does not - perform any compression: this will be done by deflate(). + with the version assumed by the caller (ZLIB_VERSION). msg is set to null + if there is no error message. deflateInit does not perform any compression: + this will be done by deflate(). */ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); /* deflate compresses as much data as possible, and stops when the input - buffer becomes empty or the output buffer becomes full. It may introduce some - output latency (reading input without producing any output) except when + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when forced to flush. - The detailed semantics are as follows. deflate performs one or both of the + The detailed semantics are as follows. deflate performs one or both of the following actions: - Compress more input starting at next_in and update next_in and avail_in - accordingly. If not all input can be processed (because there is not + accordingly. If not all input can be processed (because there is not enough room in the output buffer), next_in and avail_in are updated and processing will resume at this point for the next call of deflate(). - Provide more output starting at next_out and update next_out and avail_out - accordingly. This action is forced if the parameter flush is non zero. + accordingly. This action is forced if the parameter flush is non zero. Forcing flush frequently degrades the compression ratio, so this parameter - should be set only when necessary (in interactive applications). - Some output may be provided even if flush is not set. + should be set only when necessary (in interactive applications). Some + output may be provided even if flush is not set. - Before the call of deflate(), the application should ensure that at least - one of the actions is possible, by providing more input and/or consuming - more output, and updating avail_in or avail_out accordingly; avail_out - should never be zero before the call. The application can consume the - compressed output when it wants, for example when the output buffer is full - (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK - and with zero avail_out, it must be called again after making room in the - output buffer because there might be more output pending. + Before the call of deflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating avail_in or avail_out accordingly; avail_out should + never be zero before the call. The application can consume the compressed + output when it wants, for example when the output buffer is full (avail_out + == 0), or after each call of deflate(). If deflate returns Z_OK and with + zero avail_out, it must be called again after making room in the output + buffer because there might be more output pending. Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to - decide how much data to accumualte before producing output, in order to + decide how much data to accumulate before producing output, in order to maximize compression. If the parameter flush is set to Z_SYNC_FLUSH, all pending output is flushed to the output buffer and the output is aligned on a byte boundary, so - that the decompressor can get all input data available so far. (In particular - avail_in is zero after the call if enough output space has been provided - before the call.) Flushing may degrade compression for some compression - algorithms and so it should be used only when necessary. + that the decompressor can get all input data available so far. (In + particular avail_in is zero after the call if enough output space has been + provided before the call.) Flushing may degrade compression for some + compression algorithms and so it should be used only when necessary. This + completes the current deflate block and follows it with an empty stored block + that is three bits plus filler bits to the next byte, followed by four bytes + (00 00 ff ff). + + If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the + output buffer, but the output is not aligned to a byte boundary. All of the + input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. + This completes the current deflate block and follows it with an empty fixed + codes block that is 10 bits long. This assures that enough bytes are output + in order for the decompressor to finish the block before the empty fixed code + block. + + If flush is set to Z_BLOCK, a deflate block is completed and emitted, as + for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to + seven bits of the current block are held to be written as the next byte after + the next deflate block is completed. In this case, the decompressor may not + be provided enough bits at this point in order to complete decompression of + the data provided so far to the compressor. It may need to wait for the next + block to be emitted. This is for advanced applications that need to control + the emission of deflate blocks. If flush is set to Z_FULL_FLUSH, all output is flushed as with Z_SYNC_FLUSH, and the compression state is reset so that decompression can restart from this point if previous compressed data has been damaged or if - random access is desired. Using Z_FULL_FLUSH too often can seriously degrade + random access is desired. Using Z_FULL_FLUSH too often can seriously degrade compression. If deflate returns with avail_out == 0, this function must be called again with the same value of the flush parameter and more output space (updated avail_out), until the flush is complete (deflate returns with non-zero - avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that avail_out is greater than six to avoid repeated flush markers due to avail_out == 0 on return. If the parameter flush is set to Z_FINISH, pending input is processed, - pending output is flushed and deflate returns with Z_STREAM_END if there - was enough output space; if deflate returns with Z_OK, this function must be + pending output is flushed and deflate returns with Z_STREAM_END if there was + enough output space; if deflate returns with Z_OK, this function must be called again with Z_FINISH and more output space (updated avail_out) but no - more input data, until it returns with Z_STREAM_END or an error. After - deflate has returned Z_STREAM_END, the only possible operations on the - stream are deflateReset or deflateEnd. + more input data, until it returns with Z_STREAM_END or an error. After + deflate has returned Z_STREAM_END, the only possible operations on the stream + are deflateReset or deflateEnd. Z_FINISH can be used immediately after deflateInit if all the compression - is to be done in a single step. In this case, avail_out must be at least - the value returned by deflateBound (see below). If deflate does not return + is to be done in a single step. In this case, avail_out must be at least the + value returned by deflateBound (see below). If deflate does not return Z_STREAM_END, then it must be called again as described above. deflate() sets strm->adler to the adler32 checksum of all input read so far (that is, total_in bytes). deflate() may update strm->data_type if it can make a good guess about - the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered - binary. This field is only for information purposes and does not affect - the compression algorithm in any manner. + the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered + binary. This field is only for information purposes and does not affect the + compression algorithm in any manner. deflate() returns Z_OK if some progress has been made (more input processed or more output produced), Z_STREAM_END if all input has been consumed and all output has been produced (only when flush is set to Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example - if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible - (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not + if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible + (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and deflate() can be called again with more input and more output space to continue compressing. */ @@ -328,13 +352,13 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); /* All dynamically allocated data structures for this stream are freed. - This function discards any unprocessed input and does not flush any - pending output. + This function discards any unprocessed input and does not flush any pending + output. deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state was inconsistent, Z_DATA_ERROR if the stream was freed - prematurely (some input or output was discarded). In the error case, - msg may be set but then points to a static string (which must not be + prematurely (some input or output was discarded). In the error case, msg + may be set but then points to a static string (which must not be deallocated). */ @@ -342,10 +366,10 @@ ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); /* ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); - Initializes the internal stream state for decompression. The fields + Initializes the internal stream state for decompression. The fields next_in, avail_in, zalloc, zfree and opaque must be initialized before by - the caller. If next_in is not Z_NULL and avail_in is large enough (the exact - value depends on the compression method), inflateInit determines the + the caller. If next_in is not Z_NULL and avail_in is large enough (the + exact value depends on the compression method), inflateInit determines the compression method from the zlib header and allocates all data structures accordingly; otherwise the allocation will be deferred to the first call of inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to @@ -353,95 +377,108 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_VERSION_ERROR if the zlib library version is incompatible with the - version assumed by the caller. msg is set to null if there is no error - message. inflateInit does not perform any decompression apart from reading - the zlib header if present: this will be done by inflate(). (So next_in and - avail_in may be modified, but next_out and avail_out are unchanged.) + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit() does not process any header information -- that is deferred + until inflate() is called. */ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); /* inflate decompresses as much data as possible, and stops when the input - buffer becomes empty or the output buffer becomes full. It may introduce + buffer becomes empty or the output buffer becomes full. It may introduce some output latency (reading input without producing any output) except when forced to flush. - The detailed semantics are as follows. inflate performs one or both of the + The detailed semantics are as follows. inflate performs one or both of the following actions: - Decompress more input starting at next_in and update next_in and avail_in - accordingly. If not all input can be processed (because there is not - enough room in the output buffer), next_in is updated and processing - will resume at this point for the next call of inflate(). + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in is updated and processing will + resume at this point for the next call of inflate(). - Provide more output starting at next_out and update next_out and avail_out - accordingly. inflate() provides as much output as possible, until there - is no more input data or no more space in the output buffer (see below - about the flush parameter). + accordingly. inflate() provides as much output as possible, until there is + no more input data or no more space in the output buffer (see below about + the flush parameter). - Before the call of inflate(), the application should ensure that at least - one of the actions is possible, by providing more input and/or consuming - more output, and updating the next_* and avail_* values accordingly. - The application can consume the uncompressed output when it wants, for - example when the output buffer is full (avail_out == 0), or after each - call of inflate(). If inflate returns Z_OK and with zero avail_out, it - must be called again after making room in the output buffer because there - might be more output pending. + Before the call of inflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating the next_* and avail_* values accordingly. The + application can consume the uncompressed output when it wants, for example + when the output buffer is full (avail_out == 0), or after each call of + inflate(). If inflate returns Z_OK and with zero avail_out, it must be + called again after making room in the output buffer because there might be + more output pending. - The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, - Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much - output as possible to the output buffer. Z_BLOCK requests that inflate() stop - if and when it gets to the next deflate block boundary. When decoding the - zlib or gzip format, this will cause inflate() to return immediately after - the header and before the first block. When doing a raw inflate, inflate() - will go ahead and process the first block, and will return when it gets to - the end of that block, or when it runs out of data. + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, + Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() + stop if and when it gets to the next deflate block boundary. When decoding + the zlib or gzip format, this will cause inflate() to return immediately + after the header and before the first block. When doing a raw inflate, + inflate() will go ahead and process the first block, and will return when it + gets to the end of that block, or when it runs out of data. The Z_BLOCK option assists in appending to or combining deflate streams. Also to assist in this, on return inflate() will set strm->data_type to the - number of unused bits in the last byte taken from strm->next_in, plus 64 - if inflate() is currently decoding the last block in the deflate stream, - plus 128 if inflate() returned immediately after decoding an end-of-block - code or decoding the complete header up to just before the first byte of the - deflate stream. The end-of-block will not be indicated until all of the - uncompressed data from that block has been written to strm->next_out. The - number of unused bits may in general be greater than seven, except when - bit 7 of data_type is set, in which case the number of unused bits will be - less than eight. + number of unused bits in the last byte taken from strm->next_in, plus 64 if + inflate() is currently decoding the last block in the deflate stream, plus + 128 if inflate() returned immediately after decoding an end-of-block code or + decoding the complete header up to just before the first byte of the deflate + stream. The end-of-block will not be indicated until all of the uncompressed + data from that block has been written to strm->next_out. The number of + unused bits may in general be greater than seven, except when bit 7 of + data_type is set, in which case the number of unused bits will be less than + eight. data_type is set as noted here every time inflate() returns for all + flush options, and so can be used to determine the amount of currently + consumed input in bits. + + The Z_TREES option behaves as Z_BLOCK does, but it also returns when the + end of each deflate block header is reached, before any actual data in that + block is decoded. This allows the caller to determine the length of the + deflate block header for later use in random access within a deflate block. + 256 is added to the value of strm->data_type when inflate() returns + immediately after reaching the end of the deflate block header. inflate() should normally be called until it returns Z_STREAM_END or an - error. However if all decompression is to be performed in a single step - (a single call of inflate), the parameter flush should be set to - Z_FINISH. In this case all pending input is processed and all pending - output is flushed; avail_out must be large enough to hold all the - uncompressed data. (The size of the uncompressed data may have been saved - by the compressor for this purpose.) The next operation on this stream must - be inflateEnd to deallocate the decompression state. The use of Z_FINISH - is never required, but can be used to inform inflate that a faster approach - may be used for the single inflate() call. + error. However if all decompression is to be performed in a single step (a + single call of inflate), the parameter flush should be set to Z_FINISH. In + this case all pending input is processed and all pending output is flushed; + avail_out must be large enough to hold all the uncompressed data. (The size + of the uncompressed data may have been saved by the compressor for this + purpose.) The next operation on this stream must be inflateEnd to deallocate + the decompression state. The use of Z_FINISH is never required, but can be + used to inform inflate that a faster approach may be used for the single + inflate() call. In this implementation, inflate() always flushes as much output as possible to the output buffer, and always uses the faster approach on the - first call. So the only effect of the flush parameter in this implementation + first call. So the only effect of the flush parameter in this implementation is on the return value of inflate(), as noted below, or when it returns early - because Z_BLOCK is used. + because Z_BLOCK or Z_TREES is used. If a preset dictionary is needed after this call (see inflateSetDictionary below), inflate sets strm->adler to the adler32 checksum of the dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise it sets strm->adler to the adler32 checksum of all output produced so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described - below. At the end of the stream, inflate() checks that its computed adler32 + below. At the end of the stream, inflate() checks that its computed adler32 checksum is equal to that saved by the compressor and returns Z_STREAM_END only if the checksum is correct. - inflate() will decompress and check either zlib-wrapped or gzip-wrapped - deflate data. The header type is detected automatically. Any information - contained in the gzip header is not retained, so applications that need that - information should instead use raw inflate, see inflateInit2() below, or - inflateBack() and perform their own processing of the gzip header and - trailer. + inflate() can decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically, if requested when + initializing with inflateInit2(). Any information contained in the gzip + header is not retained, so applications that need that information should + instead use raw inflate, see inflateInit2() below, or inflateBack() and + perform their own processing of the gzip header and trailer. inflate() returns Z_OK if some progress has been made (more input processed or more output produced), Z_STREAM_END if the end of the compressed data has @@ -449,27 +486,28 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); preset dictionary is needed at this point, Z_DATA_ERROR if the input data was corrupted (input stream not conforming to the zlib format or incorrect check value), Z_STREAM_ERROR if the stream structure was inconsistent (for example - if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory, + next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if no progress is possible or if there was not enough room in the - output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and inflate() can be called again with more input and more output space to - continue decompressing. If Z_DATA_ERROR is returned, the application may then - call inflateSync() to look for a good compression block if a partial recovery - of the data is desired. + continue decompressing. If Z_DATA_ERROR is returned, the application may + then call inflateSync() to look for a good compression block if a partial + recovery of the data is desired. */ ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); /* All dynamically allocated data structures for this stream are freed. - This function discards any unprocessed input and does not flush any - pending output. + This function discards any unprocessed input and does not flush any pending + output. inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state - was inconsistent. In the error case, msg may be set but then points to a + was inconsistent. In the error case, msg may be set but then points to a static string (which must not be deallocated). */ + /* Advanced functions */ /* @@ -484,55 +522,57 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, int memLevel, int strategy)); - This is another version of deflateInit with more compression options. The - fields next_in, zalloc, zfree and opaque must be initialized before by - the caller. + This is another version of deflateInit with more compression options. The + fields next_in, zalloc, zfree and opaque must be initialized before by the + caller. - The method parameter is the compression method. It must be Z_DEFLATED in + The method parameter is the compression method. It must be Z_DEFLATED in this version of the library. The windowBits parameter is the base two logarithm of the window size - (the size of the history buffer). It should be in the range 8..15 for this - version of the library. Larger values of this parameter result in better - compression at the expense of memory usage. The default value is 15 if + (the size of the history buffer). It should be in the range 8..15 for this + version of the library. Larger values of this parameter result in better + compression at the expense of memory usage. The default value is 15 if deflateInit is used instead. - windowBits can also be -8..-15 for raw deflate. In this case, -windowBits - determines the window size. deflate() will then generate raw deflate data + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data with no zlib header or trailer, and will not compute an adler32 check value. - windowBits can also be greater than 15 for optional gzip encoding. Add + windowBits can also be greater than 15 for optional gzip encoding. Add 16 to windowBits to write a simple gzip header and trailer around the - compressed data instead of a zlib wrapper. The gzip header will have no - file name, no extra data, no comment, no modification time (set to zero), - no header crc, and the operating system will be set to 255 (unknown). If a + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), no + header crc, and the operating system will be set to 255 (unknown). If a gzip stream is being written, strm->adler is a crc32 instead of an adler32. The memLevel parameter specifies how much memory should be allocated - for the internal compression state. memLevel=1 uses minimum memory but - is slow and reduces compression ratio; memLevel=9 uses maximum memory - for optimal speed. The default value is 8. See zconf.h for total memory - usage as a function of windowBits and memLevel. + for the internal compression state. memLevel=1 uses minimum memory but is + slow and reduces compression ratio; memLevel=9 uses maximum memory for + optimal speed. The default value is 8. See zconf.h for total memory usage + as a function of windowBits and memLevel. - The strategy parameter is used to tune the compression algorithm. Use the + The strategy parameter is used to tune the compression algorithm. Use the value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no string match), or Z_RLE to limit match distances to one (run-length - encoding). Filtered data consists mostly of small values with a somewhat - random distribution. In this case, the compression algorithm is tuned to - compress them better. The effect of Z_FILTERED is to force more Huffman + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman coding and less string matching; it is somewhat intermediate between - Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as - Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy - parameter only affects the compression ratio but not the correctness of the - compressed output even if it is not set appropriately. Z_FIXED prevents the - use of dynamic Huffman codes, allowing for a simpler decoder for special - applications. + Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as + fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The + strategy parameter only affects the compression ratio but not the + correctness of the compressed output even if it is not set appropriately. + Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler + decoder for special applications. - deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough - memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid - method). msg is set to null if there is no error message. deflateInit2 does - not perform any compression: this will be done by deflate(). + deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid + method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is + incompatible with the version assumed by the caller (ZLIB_VERSION). msg is + set to null if there is no error message. deflateInit2 does not perform any + compression: this will be done by deflate(). */ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, @@ -540,37 +580,37 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, uInt dictLength)); /* Initializes the compression dictionary from the given byte sequence - without producing any compressed output. This function must be called - immediately after deflateInit, deflateInit2 or deflateReset, before any - call of deflate. The compressor and decompressor must use exactly the same + without producing any compressed output. This function must be called + immediately after deflateInit, deflateInit2 or deflateReset, before any call + of deflate. The compressor and decompressor must use exactly the same dictionary (see inflateSetDictionary). The dictionary should consist of strings (byte sequences) that are likely to be encountered later in the data to be compressed, with the most commonly - used strings preferably put towards the end of the dictionary. Using a + used strings preferably put towards the end of the dictionary. Using a dictionary is most useful when the data to be compressed is short and can be predicted with good accuracy; the data can then be compressed better than with the default empty dictionary. Depending on the size of the compression data structures selected by deflateInit or deflateInit2, a part of the dictionary may in effect be - discarded, for example if the dictionary is larger than the window size in - deflate or deflate2. Thus the strings most likely to be useful should be - put at the end of the dictionary, not at the front. In addition, the - current implementation of deflate will use at most the window size minus - 262 bytes of the provided dictionary. + discarded, for example if the dictionary is larger than the window size + provided in deflateInit or deflateInit2. Thus the strings most likely to be + useful should be put at the end of the dictionary, not at the front. In + addition, the current implementation of deflate will use at most the window + size minus 262 bytes of the provided dictionary. Upon return of this function, strm->adler is set to the adler32 value of the dictionary; the decompressor may later use this value to determine - which dictionary has been used by the compressor. (The adler32 value + which dictionary has been used by the compressor. (The adler32 value applies to the whole dictionary even if only a subset of the dictionary is actually used by the compressor.) If a raw deflate was requested, then the adler32 value is not computed and strm->adler is not set. deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a - parameter is invalid (such as NULL dictionary) or the stream state is + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is inconsistent (for example if deflate has already been called for this stream - or if the compression method is bsort). deflateSetDictionary does not + or if the compression method is bsort). deflateSetDictionary does not perform any compression: this will be done by deflate(). */ @@ -581,26 +621,26 @@ ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, This function can be useful when several compression strategies will be tried, for example when there are several ways of pre-processing the input - data with a filter. The streams that will be discarded should then be freed + data with a filter. The streams that will be discarded should then be freed by calling deflateEnd. Note that deflateCopy duplicates the internal - compression state which can be quite large, so this strategy is slow and - can consume lots of memory. + compression state which can be quite large, so this strategy is slow and can + consume lots of memory. deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_STREAM_ERROR if the source stream state was inconsistent - (such as zalloc being NULL). msg is left unchanged in both source and + (such as zalloc being Z_NULL). msg is left unchanged in both source and destination. */ ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); /* This function is equivalent to deflateEnd followed by deflateInit, - but does not free and reallocate all the internal compression state. - The stream will keep the same compression level and any other attributes - that may have been set by deflateInit2. + but does not free and reallocate all the internal compression state. The + stream will keep the same compression level and any other attributes that + may have been set by deflateInit2. - deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source - stream state was inconsistent (such as zalloc or state being NULL). + deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). */ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, @@ -610,18 +650,18 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, Dynamically update the compression level and compression strategy. The interpretation of level and strategy is as in deflateInit2. This can be used to switch between compression and straight copy of the input data, or - to switch to a different kind of input data requiring a different - strategy. If the compression level is changed, the input available so far - is compressed with the old level (and may be flushed); the new level will - take effect only at the next call of deflate(). + to switch to a different kind of input data requiring a different strategy. + If the compression level is changed, the input available so far is + compressed with the old level (and may be flushed); the new level will take + effect only at the next call of deflate(). Before the call of deflateParams, the stream state must be set as for - a call of deflate(), since the currently available input may have to - be compressed and flushed. In particular, strm->avail_out must be non-zero. + a call of deflate(), since the currently available input may have to be + compressed and flushed. In particular, strm->avail_out must be non-zero. deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source - stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR - if strm->avail_out was zero. + stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if + strm->avail_out was zero. */ ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, @@ -645,9 +685,10 @@ ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, uLong sourceLen)); /* deflateBound() returns an upper bound on the compressed size after - deflation of sourceLen bytes. It must be called after deflateInit() - or deflateInit2(). This would be used to allocate an output buffer - for deflation in a single pass, and so would be called before deflate(). + deflation of sourceLen bytes. It must be called after deflateInit() or + deflateInit2(), and after deflateSetHeader(), if used. This would be used + to allocate an output buffer for deflation in a single pass, and so would be + called before deflate(). */ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, @@ -655,21 +696,21 @@ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, int value)); /* deflatePrime() inserts bits in the deflate output stream. The intent - is that this function is used to start off the deflate output with the - bits leftover from a previous deflate stream when appending to it. As such, - this function can only be used for raw deflate, and must be used before the - first deflate() call after a deflateInit2() or deflateReset(). bits must be - less than or equal to 16, and that many of the least significant bits of - value will be inserted in the output. + is that this function is used to start off the deflate output with the bits + leftover from a previous deflate stream when appending to it. As such, this + function can only be used for raw deflate, and must be used before the first + deflate() call after a deflateInit2() or deflateReset(). bits must be less + than or equal to 16, and that many of the least significant bits of value + will be inserted in the output. - deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source stream state was inconsistent. */ ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, gz_headerp head)); /* - deflateSetHeader() provides gzip header information for when a gzip + deflateSetHeader() provides gzip header information for when a gzip stream is requested by deflateInit2(). deflateSetHeader() may be called after deflateInit2() or deflateReset() and before the first call of deflate(). The text, time, os, extra field, name, and comment information @@ -682,11 +723,11 @@ ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, 1.3.x) do not support header crc's, and will report that it is a "multi-part gzip file" and give up. - If deflateSetHeader is not used, the default gzip header has text false, + If deflateSetHeader is not used, the default gzip header has text false, the time set to zero, and os set to 255, with no extra, name, or comment fields. The gzip header is returned to the default state by deflateReset(). - deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source stream state was inconsistent. */ @@ -694,43 +735,50 @@ ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, int windowBits)); - This is another version of inflateInit with an extra parameter. The + This is another version of inflateInit with an extra parameter. The fields next_in, avail_in, zalloc, zfree and opaque must be initialized before by the caller. The windowBits parameter is the base two logarithm of the maximum window size (the size of the history buffer). It should be in the range 8..15 for - this version of the library. The default value is 15 if inflateInit is used - instead. windowBits must be greater than or equal to the windowBits value + this version of the library. The default value is 15 if inflateInit is used + instead. windowBits must be greater than or equal to the windowBits value provided to deflateInit2() while compressing, or it must be equal to 15 if - deflateInit2() was not used. If a compressed stream with a larger window + deflateInit2() was not used. If a compressed stream with a larger window size is given as input, inflate() will return with the error code Z_DATA_ERROR instead of trying to allocate a larger window. - windowBits can also be -8..-15 for raw inflate. In this case, -windowBits - determines the window size. inflate() will then process raw deflate data, + windowBits can also be zero to request that inflate use the window size in + the zlib header of the compressed stream. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, not looking for a zlib or gzip header, not generating a check value, and not - looking for any check values for comparison at the end of the stream. This + looking for any check values for comparison at the end of the stream. This is for use with other formats that use the deflate compressed data format - such as zip. Those formats provide their own check values. If a custom + such as zip. Those formats provide their own check values. If a custom format is developed using the raw deflate format for compressed data, it is recommended that a check value such as an adler32 or a crc32 be applied to the uncompressed data as is done in the zlib, gzip, and zip formats. For - most applications, the zlib format should be used as is. Note that comments + most applications, the zlib format should be used as is. Note that comments above on the use in deflateInit2() applies to the magnitude of windowBits. - windowBits can also be greater than 15 for optional gzip decoding. Add + windowBits can also be greater than 15 for optional gzip decoding. Add 32 to windowBits to enable zlib and gzip decoding with automatic header detection, or add 16 to decode only the gzip format (the zlib format will - return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is - a crc32 instead of an adler32. + return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a + crc32 instead of an adler32. inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough - memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg - is set to null if there is no error message. inflateInit2 does not perform - any decompression apart from reading the zlib header if present: this will - be done by inflate(). (So next_in and avail_in may be modified, but next_out - and avail_out are unchanged.) + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit2 does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit2() does not process any header information -- that is + deferred until inflate() is called. */ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, @@ -738,8 +786,8 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, uInt dictLength)); /* Initializes the decompression dictionary from the given uncompressed byte - sequence. This function must be called immediately after a call of inflate, - if that call returned Z_NEED_DICT. The dictionary chosen by the compressor + sequence. This function must be called immediately after a call of inflate, + if that call returned Z_NEED_DICT. The dictionary chosen by the compressor can be determined from the adler32 value returned by that call of inflate. The compressor and decompressor must use exactly the same dictionary (see deflateSetDictionary). For raw inflate, this function can be called @@ -748,26 +796,26 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, dictionary that was used for compression is provided. inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a - parameter is invalid (such as NULL dictionary) or the stream state is + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the - expected one (incorrect adler32 value). inflateSetDictionary does not + expected one (incorrect adler32 value). inflateSetDictionary does not perform any decompression: this will be done by subsequent calls of inflate(). */ ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); /* - Skips invalid compressed data until a full flush point (see above the - description of deflate with Z_FULL_FLUSH) can be found, or until all - available input is skipped. No output is provided. + Skips invalid compressed data until a full flush point (see above the + description of deflate with Z_FULL_FLUSH) can be found, or until all + available input is skipped. No output is provided. - inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR - if no more input was provided, Z_DATA_ERROR if no flush point has been found, - or Z_STREAM_ERROR if the stream structure was inconsistent. In the success - case, the application may save the current current value of total_in which - indicates where valid compressed data was found. In the error case, the - application may repeatedly call inflateSync, providing more input each time, - until success or end of the input data. + inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR + if no more input was provided, Z_DATA_ERROR if no flush point has been + found, or Z_STREAM_ERROR if the stream structure was inconsistent. In the + success case, the application may save the current current value of total_in + which indicates where valid compressed data was found. In the error case, + the application may repeatedly call inflateSync, providing more input each + time, until success or end of the input data. */ ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, @@ -782,18 +830,30 @@ ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_STREAM_ERROR if the source stream state was inconsistent - (such as zalloc being NULL). msg is left unchanged in both source and + (such as zalloc being Z_NULL). msg is left unchanged in both source and destination. */ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); /* This function is equivalent to inflateEnd followed by inflateInit, - but does not free and reallocate all the internal decompression state. - The stream will keep attributes that may have been set by inflateInit2. + but does not free and reallocate all the internal decompression state. The + stream will keep attributes that may have been set by inflateInit2. - inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source - stream state was inconsistent (such as zalloc or state being NULL). + inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, + int windowBits)); +/* + This function is the same as inflateReset, but it also permits changing + the wrap and window size requests. The windowBits parameter is interpreted + the same as it is for inflateInit2. + + inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL), or if + the windowBits parameter is invalid. */ ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, @@ -801,54 +861,87 @@ ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, int value)); /* This function inserts bits in the inflate input stream. The intent is - that this function is used to start inflating at a bit position in the - middle of a byte. The provided bits will be used before any bytes are used - from next_in. This function should only be used with raw inflate, and - should be used before the first inflate() call after inflateInit2() or - inflateReset(). bits must be less than or equal to 16, and that many of the - least significant bits of value will be inserted in the input. + that this function is used to start inflating at a bit position in the + middle of a byte. The provided bits will be used before any bytes are used + from next_in. This function should only be used with raw inflate, and + should be used before the first inflate() call after inflateInit2() or + inflateReset(). bits must be less than or equal to 16, and that many of the + least significant bits of value will be inserted in the input. - inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + If bits is negative, then the input stream bit buffer is emptied. Then + inflatePrime() can be called again to put bits in the buffer. This is used + to clear out bits leftover after feeding inflate a block description prior + to feeding inflate codes. + + inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source stream state was inconsistent. */ +ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); +/* + This function returns two values, one in the lower 16 bits of the return + value, and the other in the remaining upper bits, obtained by shifting the + return value down 16 bits. If the upper value is -1 and the lower value is + zero, then inflate() is currently decoding information outside of a block. + If the upper value is -1 and the lower value is non-zero, then inflate is in + the middle of a stored block, with the lower value equaling the number of + bytes from the input remaining to copy. If the upper value is not -1, then + it is the number of bits back from the current bit position in the input of + the code (literal or length/distance pair) currently being processed. In + that case the lower value is the number of bytes already emitted for that + code. + + A code is being processed if inflate is waiting for more input to complete + decoding of the code, or if it has completed decoding but is waiting for + more output space to write the literal or match data. + + inflateMark() is used to mark locations in the input data for random + access, which may be at bit positions, and to note those cases where the + output of a code may span boundaries of random access blocks. The current + location in the input stream can be determined from avail_in and data_type + as noted in the description for the Z_BLOCK flush parameter for inflate. + + inflateMark returns the value noted above or -1 << 16 if the provided + source stream state was inconsistent. +*/ + ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, gz_headerp head)); /* - inflateGetHeader() requests that gzip header information be stored in the + inflateGetHeader() requests that gzip header information be stored in the provided gz_header structure. inflateGetHeader() may be called after inflateInit2() or inflateReset(), and before the first call of inflate(). As inflate() processes the gzip stream, head->done is zero until the header is completed, at which time head->done is set to one. If a zlib stream is being decoded, then head->done is set to -1 to indicate that there will be - no gzip header information forthcoming. Note that Z_BLOCK can be used to - force inflate() to return immediately after header processing is complete - and before any actual data is decompressed. + no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be + used to force inflate() to return immediately after header processing is + complete and before any actual data is decompressed. - The text, time, xflags, and os fields are filled in with the gzip header + The text, time, xflags, and os fields are filled in with the gzip header contents. hcrc is set to true if there is a header CRC. (The header CRC - was valid if done is set to one.) If extra is not Z_NULL, then extra_max + was valid if done is set to one.) If extra is not Z_NULL, then extra_max contains the maximum number of bytes to write to extra. Once done is true, extra_len contains the actual extra field length, and extra contains the extra field, or that field truncated if extra_max is less than extra_len. If name is not Z_NULL, then up to name_max characters are written there, terminated with a zero unless the length is greater than name_max. If comment is not Z_NULL, then up to comm_max characters are written there, - terminated with a zero unless the length is greater than comm_max. When - any of extra, name, or comment are not Z_NULL and the respective field is - not present in the header, then that field is set to Z_NULL to signal its + terminated with a zero unless the length is greater than comm_max. When any + of extra, name, or comment are not Z_NULL and the respective field is not + present in the header, then that field is set to Z_NULL to signal its absence. This allows the use of deflateSetHeader() with the returned structure to duplicate the header. However if those fields are set to allocated memory, then the application will need to save those pointers elsewhere so that they can be eventually freed. - If inflateGetHeader is not used, then the header information is simply + If inflateGetHeader is not used, then the header information is simply discarded. The header is always checked for validity, including the header CRC if present. inflateReset() will reset the process to discard the header information. The application would need to call inflateGetHeader() again to retrieve the header from the next gzip stream. - inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source stream state was inconsistent. */ @@ -869,9 +962,9 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, See inflateBack() for the usage of these routines. inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of - the paramaters are invalid, Z_MEM_ERROR if the internal state could not - be allocated, or Z_VERSION_ERROR if the version of the library does not - match the version of the header file. + the paramaters are invalid, Z_MEM_ERROR if the internal state could not be + allocated, or Z_VERSION_ERROR if the version of the library does not match + the version of the header file. */ typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *)); @@ -891,15 +984,15 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, inflateBackInit() must be called first to allocate the internal state and to initialize the state with the user-provided window buffer. inflateBack() may then be used multiple times to inflate a complete, raw - deflate stream with each call. inflateBackEnd() is then called to free - the allocated state. + deflate stream with each call. inflateBackEnd() is then called to free the + allocated state. A raw deflate stream is one with no zlib or gzip header or trailer. This routine would normally be used in a utility that reads zip or gzip files and writes out uncompressed files. The utility would decode the - header and process the trailer on its own, hence this routine expects - only the raw deflate stream to decompress. This is different from the - normal behavior of inflate(), which expects either a zlib or gzip header and + header and process the trailer on its own, hence this routine expects only + the raw deflate stream to decompress. This is different from the normal + behavior of inflate(), which expects either a zlib or gzip header and trailer around the deflate stream. inflateBack() uses two subroutines supplied by the caller that are then @@ -925,7 +1018,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in must also be initialized, and then if strm->avail_in is not zero, input will - initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. The in_desc and out_desc parameters of inflateBack() is passed as the first parameter of in() and out() respectively when they are called. These @@ -935,15 +1028,15 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, On return, inflateBack() will set strm->next_in and strm->avail_in to pass back any unused input that was provided by the last in() call. The return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR - if in() or out() returned an error, Z_DATA_ERROR if there was a format - error in the deflate stream (in which case strm->msg is set to indicate the - nature of the error), or Z_STREAM_ERROR if the stream was not properly - initialized. In the case of Z_BUF_ERROR, an input or output error can be - distinguished using strm->next_in which will be Z_NULL only if in() returned - an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to - out() returning non-zero. (in() will always be called before out(), so - strm->next_in is assured to be defined if out() returns non-zero.) Note - that inflateBack() cannot return Z_OK. + if in() or out() returned an error, Z_DATA_ERROR if there was a format error + in the deflate stream (in which case strm->msg is set to indicate the nature + of the error), or Z_STREAM_ERROR if the stream was not properly initialized. + In the case of Z_BUF_ERROR, an input or output error can be distinguished + using strm->next_in which will be Z_NULL only if in() returned an error. If + strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning + non-zero. (in() will always be called before out(), so strm->next_in is + assured to be defined if out() returns non-zero.) Note that inflateBack() + cannot return Z_OK. */ ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); @@ -999,23 +1092,22 @@ ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); /* utility functions */ /* - The following utility functions are implemented on top of the - basic stream-oriented functions. To simplify the interface, some - default options are assumed (compression level and memory usage, - standard memory allocation functions). The source code of these - utility functions can easily be modified if you need special options. + The following utility functions are implemented on top of the basic + stream-oriented functions. To simplify the interface, some default options + are assumed (compression level and memory usage, standard memory allocation + functions). The source code of these utility functions can be modified if + you need special options. */ ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)); /* Compresses the source buffer into the destination buffer. sourceLen is - the byte length of the source buffer. Upon entry, destLen is the total - size of the destination buffer, which must be at least the value returned - by compressBound(sourceLen). Upon exit, destLen is the actual size of the + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the compressed buffer. - This function can be used to compress a whole file at once if the - input file is mmap'ed. + compress returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if there was not enough room in the output buffer. @@ -1025,11 +1117,11 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen, int level)); /* - Compresses the source buffer into the destination buffer. The level + Compresses the source buffer into the destination buffer. The level parameter has the same meaning as in deflateInit. sourceLen is the byte - length of the source buffer. Upon entry, destLen is the total size of the + length of the source buffer. Upon entry, destLen is the total size of the destination buffer, which must be at least the value returned by - compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressBound(sourceLen). Upon exit, destLen is the actual size of the compressed buffer. compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough @@ -1040,22 +1132,20 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); /* compressBound() returns an upper bound on the compressed size after - compress() or compress2() on sourceLen bytes. It would be used before - a compress() or compress2() call to allocate the destination buffer. + compress() or compress2() on sourceLen bytes. It would be used before a + compress() or compress2() call to allocate the destination buffer. */ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen)); /* Decompresses the source buffer into the destination buffer. sourceLen is - the byte length of the source buffer. Upon entry, destLen is the total - size of the destination buffer, which must be large enough to hold the - entire uncompressed data. (The size of the uncompressed data must have - been saved previously by the compressor and transmitted to the decompressor - by some mechanism outside the scope of this compression library.) - Upon exit, destLen is the actual size of the compressed buffer. - This function can be used to decompress a whole file at once if the - input file is mmap'ed. + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, destLen + is the actual size of the uncompressed buffer. uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR if there was not enough room in the output @@ -1063,136 +1153,199 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, */ -typedef voidp gzFile; + /* gzip file access functions */ -ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); /* - Opens a gzip (.gz) file for reading or writing. The mode parameter - is as in fopen ("rb" or "wb") but can also include a compression level - ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for - Huffman only compression as in "wb1h", or 'R' for run-length encoding - as in "wb1R". (See the description of deflateInit2 for more information - about the strategy parameter.) + This library supports reading and writing files in gzip (.gz) format with + an interface similar to that of stdio, using the functions that start with + "gz". The gzip format is different from the zlib format. gzip is a gzip + wrapper, documented in RFC 1952, wrapped around a deflate stream. +*/ + +typedef voidp gzFile; /* opaque gzip file descriptor */ + +/* +ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); + + Opens a gzip (.gz) file for reading or writing. The mode parameter is as + in fopen ("rb" or "wb") but can also include a compression level ("wb9") or + a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only + compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' + for fixed code compression as in "wb9F". (See the description of + deflateInit2 for more information about the strategy parameter.) Also "a" + can be used instead of "w" to request that the gzip stream that will be + written be appended to the file. "+" will result in an error, since reading + and writing to the same gzip file is not supported. gzopen can be used to read a file which is not in gzip format; in this case gzread will directly read from the file without decompression. - gzopen returns NULL if the file could not be opened or if there was - insufficient memory to allocate the (de)compression state; errno - can be checked to distinguish the two cases (if errno is zero, the - zlib error is Z_MEM_ERROR). */ + gzopen returns NULL if the file could not be opened, if there was + insufficient memory to allocate the gzFile state, or if an invalid mode was + specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). + errno can be checked to determine if the reason gzopen failed was that the + file could not be opened. +*/ -ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); +ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); /* - gzdopen() associates a gzFile with the file descriptor fd. File - descriptors are obtained from calls like open, dup, creat, pipe or - fileno (in the file has been previously opened with fopen). - The mode parameter is as in gzopen. - The next call of gzclose on the returned gzFile will also close the - file descriptor fd, just like fclose(fdopen(fd), mode) closes the file - descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode). - gzdopen returns NULL if there was insufficient memory to allocate - the (de)compression state. + gzdopen associates a gzFile with the file descriptor fd. File descriptors + are obtained from calls like open, dup, creat, pipe or fileno (if the file + has been previously opened with fopen). The mode parameter is as in gzopen. + + The next call of gzclose on the returned gzFile will also close the file + descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor + fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, + mode);. The duplicated descriptor should be saved to avoid a leak, since + gzdopen does not close fd if it fails. + + gzdopen returns NULL if there was insufficient memory to allocate the + gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not + provided, or '+' was provided), or if fd is -1. The file descriptor is not + used until the next gz* read, write, seek, or close operation, so gzdopen + will not detect if fd is invalid (unless fd is -1). +*/ + +ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); +/* + Set the internal buffer size used by this library's functions. The + default buffer size is 8192 bytes. This function must be called after + gzopen() or gzdopen(), and before any other calls that read or write the + file. The buffer memory allocation is always deferred to the first read or + write. Two buffers are allocated, either both of the specified size when + writing, or one of the specified size and the other twice that size when + reading. A larger buffer size of, for example, 64K or 128K bytes will + noticeably increase the speed of decompression (reading). + + The new buffer size also affects the maximum length for gzprintf(). + + gzbuffer() returns 0 on success, or -1 on failure, such as being called + too late. */ ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); /* - Dynamically update the compression level or strategy. See the description + Dynamically update the compression level or strategy. See the description of deflateInit2 for the meaning of these parameters. + gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not opened for writing. */ -ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); +ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); /* - Reads the given number of uncompressed bytes from the compressed file. - If the input file was not in gzip format, gzread copies the given number - of bytes into the buffer. - gzread returns the number of uncompressed bytes actually read (0 for - end of file, -1 for error). */ + Reads the given number of uncompressed bytes from the compressed file. If + the input file was not in gzip format, gzread copies the given number of + bytes into the buffer. -ZEXTERN int ZEXPORT gzwrite OF((gzFile file, - voidpc buf, unsigned len)); -/* - Writes the given number of uncompressed bytes into the compressed file. - gzwrite returns the number of uncompressed bytes actually written - (0 in case of error). + After reaching the end of a gzip stream in the input, gzread will continue + to read, looking for another gzip stream, or failing that, reading the rest + of the input file directly without decompression. The entire input file + will be read if gzread is called until it returns less than the requested + len. + + gzread returns the number of uncompressed bytes actually read, less than + len for end of file, or -1 for error. */ -ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...)); +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); /* - Converts, formats, and writes the args to the compressed file under - control of the format string, as in fprintf. gzprintf returns the number of - uncompressed bytes actually written (0 in case of error). The number of - uncompressed bytes written is limited to 4095. The caller should assure that - this limit is not exceeded. If it is exceeded, then gzprintf() will return - return an error (0) with nothing written. In this case, there may also be a - buffer overflow with unpredictable consequences, which is possible only if - zlib was compiled with the insecure functions sprintf() or vsprintf() - because the secure snprintf() or vsnprintf() functions were not available. + Writes the given number of uncompressed bytes into the compressed file. + gzwrite returns the number of uncompressed bytes written or 0 in case of + error. +*/ + +ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...)); +/* + Converts, formats, and writes the arguments to the compressed file under + control of the format string, as in fprintf. gzprintf returns the number of + uncompressed bytes actually written, or 0 in case of error. The number of + uncompressed bytes written is limited to 8191, or one less than the buffer + size given to gzbuffer(). The caller should assure that this limit is not + exceeded. If it is exceeded, then gzprintf() will return an error (0) with + nothing written. In this case, there may also be a buffer overflow with + unpredictable consequences, which is possible only if zlib was compiled with + the insecure functions sprintf() or vsprintf() because the secure snprintf() + or vsnprintf() functions were not available. This can be determined using + zlibCompileFlags(). */ ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); /* - Writes the given null-terminated string to the compressed file, excluding + Writes the given null-terminated string to the compressed file, excluding the terminating null character. - gzputs returns the number of characters written, or -1 in case of error. + + gzputs returns the number of characters written, or -1 in case of error. */ ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); /* - Reads bytes from the compressed file until len-1 characters are read, or - a newline character is read and transferred to buf, or an end-of-file - condition is encountered. The string is then terminated with a null - character. - gzgets returns buf, or Z_NULL in case of error. + Reads bytes from the compressed file until len-1 characters are read, or a + newline character is read and transferred to buf, or an end-of-file + condition is encountered. If any characters are read or if len == 1, the + string is terminated with a null character. If no characters are read due + to an end-of-file or len < 1, then the buffer is left untouched. + + gzgets returns buf which is a null-terminated string, or it returns NULL + for end-of-file or in case of error. If there was an error, the contents at + buf are indeterminate. */ -ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); +ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); /* - Writes c, converted to an unsigned char, into the compressed file. - gzputc returns the value that was written, or -1 in case of error. + Writes c, converted to an unsigned char, into the compressed file. gzputc + returns the value that was written, or -1 in case of error. */ -ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); +ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); /* - Reads one byte from the compressed file. gzgetc returns this byte - or -1 in case of end of file or error. + Reads one byte from the compressed file. gzgetc returns this byte or -1 + in case of end of file or error. */ -ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); /* - Push one character back onto the stream to be read again later. - Only one character of push-back is allowed. gzungetc() returns the - character pushed, or -1 on failure. gzungetc() will fail if a - character has been pushed but not read yet, or if c is -1. The pushed - character will be discarded if the stream is repositioned with gzseek() - or gzrewind(). + Push one character back onto the stream to be read as the first character + on the next read. At least one character of push-back is allowed. + gzungetc() returns the character pushed, or -1 on failure. gzungetc() will + fail if c is -1, and may fail if a character has been pushed but not read + yet. If gzungetc is used immediately after gzopen or gzdopen, at least the + output buffer size of pushed characters is allowed. (See gzbuffer above.) + The pushed character will be discarded if the stream is repositioned with + gzseek() or gzrewind(). */ -ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); +ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); /* - Flushes all pending output into the compressed file. The parameter - flush is as in the deflate() function. The return value is the zlib - error number (see function gzerror below). gzflush returns Z_OK if - the flush parameter is Z_FINISH and all output could be flushed. - gzflush should be called only when strictly necessary because it can - degrade compression. + Flushes all pending output into the compressed file. The parameter flush + is as in the deflate() function. The return value is the zlib error number + (see function gzerror below). gzflush is only permitted when writing. + + If the flush parameter is Z_FINISH, the remaining data is written and the + gzip stream is completed in the output. If gzwrite() is called again, a new + gzip stream will be started in the output. gzread() is able to read such + concatented gzip streams. + + gzflush should be called only when strictly necessary because it will + degrade compression if called too often. */ -ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, - z_off_t offset, int whence)); /* - Sets the starting position for the next gzread or gzwrite on the - given compressed file. The offset represents a number of bytes in the - uncompressed data stream. The whence parameter is defined as in lseek(2); +ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, + z_off_t offset, int whence)); + + Sets the starting position for the next gzread or gzwrite on the given + compressed file. The offset represents a number of bytes in the + uncompressed data stream. The whence parameter is defined as in lseek(2); the value SEEK_END is not supported. + If the file is opened for reading, this function is emulated but can be - extremely slow. If the file is opened for writing, only forward seeks are + extremely slow. If the file is opened for writing, only forward seeks are supported; gzseek then compresses a sequence of zeroes up to the new starting position. - gzseek returns the resulting offset location as measured in bytes from + gzseek returns the resulting offset location as measured in bytes from the beginning of the uncompressed stream, or -1 in case of error, in particular if the file is opened for writing and the new starting position would be before the current position. @@ -1202,68 +1355,127 @@ ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); /* Rewinds the given file. This function is supported only for reading. - gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) + gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) */ -ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); /* - Returns the starting position for the next gzread or gzwrite on the - given compressed file. This position represents a number of bytes in the - uncompressed data stream. +ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); - gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) + Returns the starting position for the next gzread or gzwrite on the given + compressed file. This position represents a number of bytes in the + uncompressed data stream, and is zero when starting, even if appending or + reading a gzip stream from the middle of a file using gzdopen(). + + gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); + + Returns the current offset in the file being read or written. This offset + includes the count of bytes that precede the gzip stream, for example when + appending or when using gzdopen() for reading. When reading, the offset + does not include as yet unused buffered input. This information can be used + for a progress indicator. On error, gzoffset() returns -1. */ ZEXTERN int ZEXPORT gzeof OF((gzFile file)); /* - Returns 1 when EOF has previously been detected reading the given - input stream, otherwise zero. + Returns true (1) if the end-of-file indicator has been set while reading, + false (0) otherwise. Note that the end-of-file indicator is set only if the + read tried to go past the end of the input, but came up short. Therefore, + just like feof(), gzeof() may return false even if there is no more data to + read, in the event that the last read request was for the exact number of + bytes remaining in the input file. This will happen if the input file size + is an exact multiple of the buffer size. + + If gzeof() returns true, then the read functions will return no more data, + unless the end-of-file indicator is reset by gzclearerr() and the input file + has grown since the previous end of file was detected. */ ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); /* - Returns 1 if file is being read directly without decompression, otherwise - zero. + Returns true (1) if file is being copied directly while reading, or false + (0) if file is a gzip stream being decompressed. This state can change from + false to true while reading the input file if the end of a gzip stream is + reached, but is followed by data that is not another gzip stream. + + If the input file is empty, gzdirect() will return true, since the input + does not contain a gzip stream. + + If gzdirect() is used immediately after gzopen() or gzdopen() it will + cause buffers to be allocated to allow reading the file to determine if it + is a gzip file. Therefore if gzbuffer() is used, it should be called before + gzdirect(). */ ZEXTERN int ZEXPORT gzclose OF((gzFile file)); /* - Flushes all pending output if necessary, closes the compressed file - and deallocates all the (de)compression state. The return value is the zlib - error number (see function gzerror below). + Flushes all pending output if necessary, closes the compressed file and + deallocates the (de)compression state. Note that once file is closed, you + cannot call gzerror with file, since its structures have been deallocated. + gzclose must not be called more than once on the same file, just as free + must not be called more than once on the same allocation. + + gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a + file operation error, or Z_OK on success. +*/ + +ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); +ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); +/* + Same as gzclose(), but gzclose_r() is only for use when reading, and + gzclose_w() is only for use when writing or appending. The advantage to + using these instead of gzclose() is that they avoid linking in zlib + compression or decompression code that is not used when only reading or only + writing respectively. If gzclose() is used, then both compression and + decompression code will be included the application when linking to a static + zlib library. */ ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); /* - Returns the error message for the last error which occurred on the - given compressed file. errnum is set to zlib error number. If an - error occurred in the file system and not in the compression library, - errnum is set to Z_ERRNO and the application may consult errno - to get the exact error code. + Returns the error message for the last error which occurred on the given + compressed file. errnum is set to zlib error number. If an error occurred + in the file system and not in the compression library, errnum is set to + Z_ERRNO and the application may consult errno to get the exact error code. + + The application must not modify the returned string. Future calls to + this function may invalidate the previously returned string. If file is + closed, then the string previously returned by gzerror will no longer be + available. + + gzerror() should be used to distinguish errors from end-of-file for those + functions above that do not distinguish those cases in their return values. */ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); /* - Clears the error and end-of-file flags for file. This is analogous to the - clearerr() function in stdio. This is useful for continuing to read a gzip + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip file that is being written concurrently. */ + /* checksum functions */ /* These functions are not related to compression but are exported - anyway because they might be useful in applications using the - compression library. + anyway because they might be useful in applications using the compression + library. */ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); /* Update a running Adler-32 checksum with the bytes buf[0..len-1] and - return the updated checksum. If buf is NULL, this function returns - the required initial value for the checksum. - An Adler-32 checksum is almost as reliable as a CRC32 but can be computed - much faster. Usage example: + return the updated checksum. If buf is Z_NULL, this function returns the + required initial value for the checksum. + + An Adler-32 checksum is almost as reliable as a CRC32 but can be computed + much faster. + + Usage example: uLong adler = adler32(0L, Z_NULL, 0); @@ -1273,9 +1485,10 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); if (adler != original_adler) error(); */ +/* ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, z_off_t len2)); -/* + Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of @@ -1285,9 +1498,11 @@ ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); /* Update a running CRC-32 with the bytes buf[0..len-1] and return the - updated CRC-32. If buf is NULL, this function returns the required initial - value for the for the crc. Pre- and post-conditioning (one's complement) is - performed within this function so it shouldn't be done by the application. + updated CRC-32. If buf is Z_NULL, this function returns the required + initial value for the for the crc. Pre- and post-conditioning (one's + complement) is performed within this function so it shouldn't be done by the + application. + Usage example: uLong crc = crc32(0L, Z_NULL, 0); @@ -1298,9 +1513,9 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); if (crc != original_crc) error(); */ +/* ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); -/* Combine two CRC-32 check values into one. For two sequences of bytes, seq1 and seq2 with lengths len1 and len2, CRC-32 check values were calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 @@ -1339,16 +1554,57 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream)) #define inflateBackInit(strm, windowBits, window) \ inflateBackInit_((strm), (windowBits), (window), \ - ZLIB_VERSION, sizeof(z_stream)) + ZLIB_VERSION, sizeof(z_stream)) - -#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) - struct internal_state {int dummy;}; /* hack for buggy compilers */ +/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or + * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if + * both are true, the application gets the *64 functions, and the regular + * functions are changed to 64 bits) -- in case these are set on systems + * without large file support, _LFS64_LARGEFILE must also be true + */ +#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); + ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); #endif +#if !defined(ZLIB_INTERNAL) && _FILE_OFFSET_BITS-0 == 64 && _LFS64_LARGEFILE-0 +# define gzopen gzopen64 +# define gzseek gzseek64 +# define gztell gztell64 +# define gzoffset gzoffset64 +# define adler32_combine adler32_combine64 +# define crc32_combine crc32_combine64 +# ifdef _LARGEFILE64_SOURCE + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +# endif +#else + ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); +#endif + +/* hack for buggy compilers */ +#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) + struct internal_state {int dummy;}; +#endif + +/* undocumented functions */ ZEXTERN const char * ZEXPORT zError OF((int)); -ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z)); +ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void)); +ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); #ifdef __cplusplus } diff --git a/ExternalLibs/glpng/zlib/zutil.c b/ExternalLibs/glpng/zlib/zutil.c index 47d1ef1..898ed34 100644 --- a/ExternalLibs/glpng/zlib/zutil.c +++ b/ExternalLibs/glpng/zlib/zutil.c @@ -1,5 +1,5 @@ /* zutil.c -- target dependent utility functions for the compression library - * Copyright (C) 1995-2005 Jean-loup Gailly. + * Copyright (C) 1995-2005, 2010 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -34,25 +34,25 @@ uLong ZEXPORT zlibCompileFlags() uLong flags; flags = 0; - switch (sizeof(uInt)) { + switch ((int)(sizeof(uInt))) { case 2: break; case 4: flags += 1; break; case 8: flags += 2; break; default: flags += 3; } - switch (sizeof(uLong)) { + switch ((int)(sizeof(uLong))) { case 2: break; case 4: flags += 1 << 2; break; case 8: flags += 2 << 2; break; default: flags += 3 << 2; } - switch (sizeof(voidpf)) { + switch ((int)(sizeof(voidpf))) { case 2: break; case 4: flags += 1 << 4; break; case 8: flags += 2 << 4; break; default: flags += 3 << 4; } - switch (sizeof(z_off_t)) { + switch ((int)(sizeof(z_off_t))) { case 2: break; case 4: flags += 1 << 6; break; case 8: flags += 2 << 6; break; @@ -117,9 +117,9 @@ uLong ZEXPORT zlibCompileFlags() # ifndef verbose # define verbose 0 # endif -int z_verbose = verbose; +int ZLIB_INTERNAL z_verbose = verbose; -void z_error (m) +void ZLIB_INTERNAL z_error (m) char *m; { fprintf(stderr, "%s\n", m); @@ -146,7 +146,7 @@ const char * ZEXPORT zError(err) #ifndef HAVE_MEMCPY -void zmemcpy(dest, source, len) +void ZLIB_INTERNAL zmemcpy(dest, source, len) Bytef* dest; const Bytef* source; uInt len; @@ -157,7 +157,7 @@ void zmemcpy(dest, source, len) } while (--len != 0); } -int zmemcmp(s1, s2, len) +int ZLIB_INTERNAL zmemcmp(s1, s2, len) const Bytef* s1; const Bytef* s2; uInt len; @@ -170,7 +170,7 @@ int zmemcmp(s1, s2, len) return 0; } -void zmemzero(dest, len) +void ZLIB_INTERNAL zmemzero(dest, len) Bytef* dest; uInt len; { @@ -213,7 +213,7 @@ local ptr_table table[MAX_PTR]; * a protected system like OS/2. Use Microsoft C instead. */ -voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) +voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size) { voidpf buf = opaque; /* just to make some compilers happy */ ulg bsize = (ulg)items*size; @@ -237,7 +237,7 @@ voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) return buf; } -void zcfree (voidpf opaque, voidpf ptr) +void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr) { int n; if (*(ush*)&ptr != 0) { /* object < 64K */ @@ -272,13 +272,13 @@ void zcfree (voidpf opaque, voidpf ptr) # define _hfree hfree #endif -voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) +voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size) { if (opaque) opaque = 0; /* to make compiler happy */ return _halloc((long)items, size); } -void zcfree (voidpf opaque, voidpf ptr) +void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr) { if (opaque) opaque = 0; /* to make compiler happy */ _hfree(ptr); @@ -297,7 +297,7 @@ extern voidp calloc OF((uInt items, uInt size)); extern void free OF((voidpf ptr)); #endif -voidpf zcalloc (opaque, items, size) +voidpf ZLIB_INTERNAL zcalloc (opaque, items, size) voidpf opaque; unsigned items; unsigned size; @@ -307,7 +307,7 @@ voidpf zcalloc (opaque, items, size) (voidpf)calloc(items, size); } -void zcfree (opaque, ptr) +void ZLIB_INTERNAL zcfree (opaque, ptr) voidpf opaque; voidpf ptr; { @@ -316,4 +316,3 @@ void zcfree (opaque, ptr) } #endif /* MY_ZCALLOC */ - diff --git a/ExternalLibs/glpng/zlib/zutil.h b/ExternalLibs/glpng/zlib/zutil.h index b7d5eff..258fa88 100644 --- a/ExternalLibs/glpng/zlib/zutil.h +++ b/ExternalLibs/glpng/zlib/zutil.h @@ -1,5 +1,5 @@ /* zutil.h -- internal interface and configuration of the compression library - * Copyright (C) 1995-2005 Jean-loup Gailly. + * Copyright (C) 1995-2010 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -13,31 +13,21 @@ #ifndef ZUTIL_H #define ZUTIL_H -#define ZLIB_INTERNAL +#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ) +# define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) +#else +# define ZLIB_INTERNAL +#endif + #include "zlib.h" #ifdef STDC -# ifndef _WIN32_WCE +# if !(defined(_WIN32_WCE) && defined(_MSC_VER)) # include # endif # include # include #endif -#ifdef NO_ERRNO_H -# ifdef _WIN32_WCE - /* The Microsoft C Run-Time Library for Windows CE doesn't have - * errno. We define it as a global variable to simplify porting. - * Its value is always 0 and should not be used. We rename it to - * avoid conflict with other libraries that use the same workaround. - */ -# define errno z_errno -# endif - extern int errno; -#else -# ifndef _WIN32_WCE -# include -# endif -#endif #ifndef local # define local static @@ -89,7 +79,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) # define OS_CODE 0x00 # if defined(__TURBOC__) || defined(__BORLANDC__) -# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) +# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) /* Allow compilation with ANSI keywords only enabled */ void _Cdecl farfree( void *block ); void *_Cdecl farmalloc( unsigned long nbytes ); @@ -118,7 +108,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ #ifdef OS2 # define OS_CODE 0x06 # ifdef M_I86 - #include +# include # endif #endif @@ -151,7 +141,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ # define fdopen(fd,mode) NULL /* No fdopen() */ #endif -#if (defined(_MSC_VER) && (_MSC_VER > 600)) +#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX # if defined(_WIN32_WCE) # define fdopen(fd,mode) NULL /* No fdopen() */ # ifndef _PTRDIFF_T_DEFINED @@ -163,6 +153,18 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ # endif #endif +#if defined(__BORLANDC__) + #pragma warn -8004 + #pragma warn -8008 + #pragma warn -8066 +#endif + +/* provide prototypes for these when building zlib without LFS */ +#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +#endif + /* common defaults */ #ifndef OS_CODE @@ -197,7 +199,9 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ # ifdef WIN32 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ # if !defined(vsnprintf) && !defined(NO_vsnprintf) -# define vsnprintf _vsnprintf +# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) +# define vsnprintf _vsnprintf +# endif # endif # endif # ifdef __SASC @@ -232,16 +236,16 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ # define zmemzero(dest, len) memset(dest, 0, len) # endif #else - extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); - extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); - extern void zmemzero OF((Bytef* dest, uInt len)); + void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); + int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); + void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len)); #endif /* Diagnostic functions */ #ifdef DEBUG # include - extern int z_verbose; - extern void z_error OF((char *m)); + extern int ZLIB_INTERNAL z_verbose; + extern void ZLIB_INTERNAL z_error OF((char *m)); # define Assert(cond,msg) {if(!(cond)) z_error(msg);} # define Trace(x) {if (z_verbose>=0) fprintf x ;} # define Tracev(x) {if (z_verbose>0) fprintf x ;} @@ -258,8 +262,9 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ #endif -voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); -void zcfree OF((voidpf opaque, voidpf ptr)); +voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, + unsigned size)); +void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); #define ZALLOC(strm, items, size) \ (*((strm)->zalloc))((strm)->opaque, (items), (size)) diff --git a/ExternalLibs/libogg-1.2.0/AUTHORS b/ExternalLibs/libogg-1.2.0/AUTHORS deleted file mode 100644 index 80c787c..0000000 --- a/ExternalLibs/libogg-1.2.0/AUTHORS +++ /dev/null @@ -1,4 +0,0 @@ -Monty - -and the rest of the Xiph.Org Foundation. - diff --git a/ExternalLibs/libogg-1.2.0/CHANGES b/ExternalLibs/libogg-1.2.0/CHANGES deleted file mode 100644 index 40c60b6..0000000 --- a/ExternalLibs/libogg-1.2.0/CHANGES +++ /dev/null @@ -1,49 +0,0 @@ -Version 1.2.0 (2010 March 25) - -* Alter default flushing behavior to span less often and use larger page - sizes when packet sizes are large. -* Build fixes for additional compilers -* Documentation updates - -Version 1.1.4 (2009 June 24) - -* New async error reporting mechanism. Calls made after a fatal error are - now safely handled in the event an error code is ignored -* Added allocation checks useful to some embedded applications -* fix possible read past end of buffer when reading 0 bits -* Updates to API documentation -* Build fixes - -Version 1.1.3 (2005 November 27) - - * Correct a bug in the granulepos field of pages where no packet ends - * New VS2003 and XCode builds, minor fixes to other builds - * documentation fixes and cleanup - -Version 1.1.2 (2004 September 23) - - * fix a bug with multipage packet assembly after seek - -Version 1.1.1 (2004 September 12) - - * various bugfixes - * important bugfix for 64-bit platforms - * various portability fixes - * autotools cleanup from Thomas Vander Stichele - * Symbian OS build support from Colin Ward at CSIRO - * new multiplexed Ogg stream documentation - -Version 1.1 (2003 November 17) - - * big-endian bitpacker routines for Theora - * various portability fixes - * improved API documenation - * RFC 3533 documentation of the format by Silvia Pfeiffer at CSIRO - * RFC 3534 documentation of the application/ogg mime-type by Linus Walleij - -Version 1.0 (2002 July 19) - - * First stable release - * little-endian bitpacker routines for Vorbis - * basic Ogg bitstream sync and coding support - diff --git a/ExternalLibs/libogg-1.2.0/Makefile.am b/ExternalLibs/libogg-1.2.0/Makefile.am deleted file mode 100644 index 9eb7955..0000000 --- a/ExternalLibs/libogg-1.2.0/Makefile.am +++ /dev/null @@ -1,30 +0,0 @@ -## Process this file with automake to produce Makefile.in - -AUTOMAKE_OPTIONS = foreign 1.6 dist-zip - -SUBDIRS = src include doc - -m4datadir = $(datadir)/aclocal -m4data_DATA = ogg.m4 - -pkgconfigdir = $(libdir)/pkgconfig -pkgconfig_DATA = ogg.pc - -EXTRA_DIST = README AUTHORS CHANGES COPYING \ - libogg.spec libogg.spec.in \ - ogg.m4 ogg.pc.in ogg-uninstalled.pc.in \ - macos macosx win32 - -dist-hook: - for item in $(EXTRA_DIST); 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do \ - if test -d $$item; then \ - echo -n "cleaning dir $$item for distribution..."; \ - rm -rf `find $(distdir)/$$item -name .svn`; \ - echo "OK"; \ - fi; \ - done -debug: - $(MAKE) all CFLAGS="@DEBUG@" - -profile: - $(MAKE) all CFLAGS="@PROFILE@" -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/ExternalLibs/libogg-1.2.0/README b/ExternalLibs/libogg-1.2.0/README deleted file mode 100644 index e31d40a..0000000 --- a/ExternalLibs/libogg-1.2.0/README +++ /dev/null @@ -1,133 +0,0 @@ -******************************************************************** -* * -* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * -* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * -* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * -* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * -* * -* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002 * -* by the Xiph.Org Foundation http://www.xiph.org/ * -* * -******************************************************************** - -WHAT'S HERE: - -This source distribution includes libogg and nothing else. Other modules -(eg, the modules vorbis, vorbis-tools and vorbis-plugins for the Vorbis -codec) contain the codec libraries for use with Ogg bitstreams. - -Directory: - -./src The source for libogg, a BSD-license inplementation of - the public domain Ogg bitstream format - -./include Library API headers and codebooks - -./doc Ogg specification documents - -./win32 Win32 projects and build automation - -./macosx MacOS X project and build files - -./macos Classic MacOS 9 projects and build automation - -./debian Rules/spec files for building Debian .deb packages - (may not be present, depending on your distribution) - -WHAT IS OGG?: - -Ogg project codecs use the Ogg bitstream format to arrange the raw, -compressed bitstream into a more robust, useful form. For example, -the Ogg bitstream makes seeking, time stamping and error recovery -possible, as well as mixing several sepearate, concurrent media -streams into a single physical bitstream. - -CONTACT: - -The Ogg homepage is located at 'http://www.xiph.org/ogg/'. -Up to date technical documents, contact information, source code and -pre-built utilities may be found there. - -BUILDING FROM REPOSITORY SOURCE: - -A standard svn build should consist of nothing more than: - -./autogen.sh -make - -and as root if desired : - -make install - -This will install the Ogg libraries (static and shared) into -/usr/local/lib, includes into /usr/local/include and API manpages -(once we write some) into /usr/local/man. - -BUILDING FROM TARBALL DISTRIBUTIONS: - -./configure -make - -and optionally (as root): -make install - -BUILDING RPMS: - -RPMs may be built by: - -make dist -rpm -ta libogg-.tar.gz - -BUILDING ON WIN32: - -Use the project file in the win32 directory. It should compile out of the box. -You can also run one of the batch files from the commandline. - -E.g.: build_ogg_dynamic - -CROSS COMPILING FROM LINUX TO WIN32: - -It is also possible to cross compile from Linux to windows using the MinGW -cross tools and even to run the test suite under Wine, the Linux/*nix -windows emulator. - -On Debian and Ubuntu systems, these cross compiler tools can be installed -by doing: - - sudo apt-get mingw32 mingw32-binutils mingw32-runtime wine - -Once these tools are installed its possible to compile and test by -executing the following commands: - - ./configure --host=i586-mingw32msvc --target=i586-mingw32msvc \ - --build=i586-linux - make - make check - -The above has been tested with the following versions of the tools on -Ubuntu's Hardy Heron release: - - mingw32 4.2.1.dfsg-1ubuntu1 - mingw32-binutils 2.17.50-20070129.1-1 - mingw32-runtime 3.13-1 - wine 0.9.59-0ubuntu4 - -BUILDING ON MACOS 9: - -Ogg on MacOS 9 is built using CodeWarrior 5.3. To build it, first -open ogg/mac/libogg.mcp, switch to the "Targets" pane, select -everything, and make the project. In ogg/mac/Output you will now have -both debug and final versions of Ogg shared libraries to link your -projects against. - -To build a project using Ogg, add access paths to your CodeWarrior -project for the ogg/include and ogg/mac/Output folders. Be sure that -"interpret DOS and Unix paths" is turned on in your project; it can be -found in the "access paths" pane in your project settings. Now simply -add the shared libraries you need to your project (OggLib at least) -and #include "ogg/ogg.h" wherever you need to acces Ogg functionality. - -(Build instructions for Ogg codecs such as vorbis are similar and may -be found in those source modules' README files) - -$Id: README 14726 2008-04-14 08:40:46Z erikd $ diff --git a/ExternalLibs/libogg-1.2.0/aclocal.m4 b/ExternalLibs/libogg-1.2.0/aclocal.m4 deleted file mode 100644 index 9022392..0000000 --- a/ExternalLibs/libogg-1.2.0/aclocal.m4 +++ /dev/null @@ -1,8884 +0,0 @@ -# generated automatically by aclocal 1.9.6 -*- Autoconf -*- - -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, -# 2005 Free Software Foundation, Inc. -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -# libtool.m4 - Configure libtool for the host system. -*-Autoconf-*- -# -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, -# 2006, 2007, 2008 Free Software Foundation, Inc. -# Written by Gordon Matzigkeit, 1996 -# -# This file is free software; the Free Software Foundation gives -# unlimited permission to copy and/or distribute it, with or without -# modifications, as long as this notice is preserved. - -m4_define([_LT_COPYING], [dnl -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, -# 2006, 2007, 2008 Free Software Foundation, Inc. -# Written by Gordon Matzigkeit, 1996 -# -# This file is part of GNU Libtool. -# -# GNU Libtool is free software; you can redistribute it and/or -# modify it under the terms of the GNU General Public License as -# published by the Free Software Foundation; either version 2 of -# the License, or (at your option) any later version. -# -# As a special exception to the GNU General Public License, -# if you distribute this file as part of a program or library that -# is built using GNU Libtool, you may include this file under the -# same distribution terms that you use for the rest of that program. -# -# GNU Libtool is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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- esac - ;; - esac - fi - done - IFS="$lt_save_ifs" - done - : ${lt_cv_path_NM=no} -fi]) -if test "$lt_cv_path_NM" != "no"; then - NM="$lt_cv_path_NM" -else - # Didn't find any BSD compatible name lister, look for dumpbin. - AC_CHECK_TOOLS(DUMPBIN, ["dumpbin -symbols" "link -dump -symbols"], :) - AC_SUBST([DUMPBIN]) - if test "$DUMPBIN" != ":"; then - NM="$DUMPBIN" - fi -fi -test -z "$NM" && NM=nm -AC_SUBST([NM]) -_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl - -AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface], - [lt_cv_nm_interface="BSD nm" - echo "int some_variable = 0;" > conftest.$ac_ext - (eval echo "\"\$as_me:__oline__: $ac_compile\"" >&AS_MESSAGE_LOG_FD) - (eval "$ac_compile" 2>conftest.err) - cat conftest.err >&AS_MESSAGE_LOG_FD - (eval echo "\"\$as_me:__oline__: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD) - (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) - cat conftest.err >&AS_MESSAGE_LOG_FD - (eval echo "\"\$as_me:__oline__: output\"" >&AS_MESSAGE_LOG_FD) - cat conftest.out >&AS_MESSAGE_LOG_FD - if $GREP 'External.*some_variable' conftest.out > /dev/null; then - lt_cv_nm_interface="MS dumpbin" - fi - rm -f conftest*]) -])# LT_PATH_NM - -# Old names: -AU_ALIAS([AM_PROG_NM], [LT_PATH_NM]) -AU_ALIAS([AC_PROG_NM], [LT_PATH_NM]) -dnl aclocal-1.4 backwards compatibility: -dnl AC_DEFUN([AM_PROG_NM], []) -dnl AC_DEFUN([AC_PROG_NM], []) - - -# LT_LIB_M -# -------- -# check for math library -AC_DEFUN([LT_LIB_M], -[AC_REQUIRE([AC_CANONICAL_HOST])dnl -LIBM= -case $host in -*-*-beos* | *-*-cygwin* | *-*-pw32* | *-*-darwin*) - # These system don't have libm, or don't need it - ;; -*-ncr-sysv4.3*) - AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw") - AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm") - ;; -*) - AC_CHECK_LIB(m, cos, LIBM="-lm") - ;; -esac -AC_SUBST([LIBM]) -])# LT_LIB_M - -# Old name: -AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M]) -dnl aclocal-1.4 backwards compatibility: -dnl AC_DEFUN([AC_CHECK_LIBM], []) - - -# _LT_COMPILER_NO_RTTI([TAGNAME]) -# ------------------------------- -m4_defun([_LT_COMPILER_NO_RTTI], -[m4_require([_LT_TAG_COMPILER])dnl - -_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= - -if test "$GCC" = yes; 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See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - - -# Originally written by Per Bothner . -# Please send patches to . Submit a context -# diff and a properly formatted ChangeLog entry. -# -# This script attempts to guess a canonical system name similar to -# config.sub. If it succeeds, it prints the system name on stdout, and -# exits with 0. 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GNU and HP use different nomenclature: - # - # $ CC_FOR_BUILD=cc ./config.guess - # => hppa2.0w-hp-hpux11.23 - # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess - # => hppa64-hp-hpux11.23 - - if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | - grep __LP64__ >/dev/null - then - HP_ARCH="hppa2.0w" - else - HP_ARCH="hppa64" - fi - fi - echo ${HP_ARCH}-hp-hpux${HPUX_REV} - exit ;; - ia64:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux${HPUX_REV} - exit ;; - 3050*:HI-UX:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - int - main () - { - long cpu = sysconf (_SC_CPU_VERSION); - /* The order matters, because CPU_IS_HP_MC68K erroneously returns - true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct - results, however. */ - if (CPU_IS_PA_RISC (cpu)) - { - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; - case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; - default: puts ("hppa-hitachi-hiuxwe2"); break; - } - } - else if (CPU_IS_HP_MC68K (cpu)) - puts ("m68k-hitachi-hiuxwe2"); - else puts ("unknown-hitachi-hiuxwe2"); - exit (0); - } -EOF - $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` && - { echo "$SYSTEM_NAME"; exit; } - echo unknown-hitachi-hiuxwe2 - exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) - echo hppa1.1-hp-bsd - exit ;; - 9000/8??:4.3bsd:*:*) - echo hppa1.0-hp-bsd - exit ;; - *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - echo hppa1.0-hp-mpeix - exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) - echo hppa1.1-hp-osf - exit ;; - hp8??:OSF1:*:*) - echo hppa1.0-hp-osf - exit ;; - i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then - echo ${UNAME_MACHINE}-unknown-osf1mk - else - echo ${UNAME_MACHINE}-unknown-osf1 - fi - exit ;; - parisc*:Lites*:*:*) - echo hppa1.1-hp-lites - exit ;; - C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) - echo c1-convex-bsd - exit ;; - C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) - echo c34-convex-bsd - exit ;; - C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) - echo c38-convex-bsd - exit ;; - C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) - echo c4-convex-bsd - exit ;; - CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*[A-Z]90:*:*:*) - echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ - | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ - -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ - -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*TS:*:*:*) - echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*SV1:*:*:*) - echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` - echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'` - echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} - exit ;; - sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:BSD/OS:*:*) - echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:FreeBSD:*:*) - case ${UNAME_MACHINE} in - pc98) - echo i386-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - amd64) - echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - *) - echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - esac - exit ;; - i*:CYGWIN*:*) - echo ${UNAME_MACHINE}-pc-cygwin - exit ;; - i*:MINGW*:*) - echo ${UNAME_MACHINE}-pc-mingw32 - exit ;; - i*:windows32*:*) - # uname -m includes "-pc" on this system. - echo ${UNAME_MACHINE}-mingw32 - exit ;; - i*:PW*:*) - echo ${UNAME_MACHINE}-pc-pw32 - exit ;; - x86:Interix*:[3456]*) - echo i586-pc-interix${UNAME_RELEASE} - exit ;; - EM64T:Interix*:[3456]*) - echo x86_64-unknown-interix${UNAME_RELEASE} - exit ;; - [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*) - echo i${UNAME_MACHINE}-pc-mks - exit ;; - i*:Windows_NT*:* | Pentium*:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we - # UNAME_MACHINE based on the output of uname instead of i386? - echo i586-pc-interix - exit ;; - i*:UWIN*:*) - echo ${UNAME_MACHINE}-pc-uwin - exit ;; - amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) - echo x86_64-unknown-cygwin - exit ;; - p*:CYGWIN*:*) - echo powerpcle-unknown-cygwin - exit ;; - prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; - *:GNU:*:*) - # the GNU system - echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` - exit ;; - *:GNU/*:*:*) - # other systems with GNU libc and userland - echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu - exit ;; - i*86:Minix:*:*) - echo ${UNAME_MACHINE}-pc-minix - exit ;; - arm*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - avr32*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - cris:Linux:*:*) - echo cris-axis-linux-gnu - exit ;; - crisv32:Linux:*:*) - echo crisv32-axis-linux-gnu - exit ;; - frv:Linux:*:*) - echo frv-unknown-linux-gnu - exit ;; - ia64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m32r*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m68*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - mips:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #undef CPU - #undef mips - #undef mipsel - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=mipsel - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=mips - #else - CPU= - #endif - #endif -EOF - eval "`$CC_FOR_BUILD -E $dummy.c 2>/dev/null | sed -n ' - /^CPU/{ - s: ::g - p - }'`" - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } - ;; - mips64:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #undef CPU - #undef mips64 - #undef mips64el - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=mips64el - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=mips64 - #else - CPU= - #endif - #endif -EOF - eval "`$CC_FOR_BUILD -E $dummy.c 2>/dev/null | sed -n ' - /^CPU/{ - s: ::g - p - }'`" - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } - ;; - or32:Linux:*:*) - echo or32-unknown-linux-gnu - exit ;; - ppc:Linux:*:*) - echo powerpc-unknown-linux-gnu - exit ;; - ppc64:Linux:*:*) - echo powerpc64-unknown-linux-gnu - exit ;; - alpha:Linux:*:*) - case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in - EV5) UNAME_MACHINE=alphaev5 ;; - EV56) UNAME_MACHINE=alphaev56 ;; - PCA56) UNAME_MACHINE=alphapca56 ;; - PCA57) UNAME_MACHINE=alphapca56 ;; - EV6) UNAME_MACHINE=alphaev6 ;; - EV67) UNAME_MACHINE=alphaev67 ;; - EV68*) UNAME_MACHINE=alphaev68 ;; - esac - objdump --private-headers /bin/sh | grep ld.so.1 >/dev/null - if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi - echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} - exit ;; - parisc:Linux:*:* | hppa:Linux:*:*) - # Look for CPU level - case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-gnu ;; - PA8*) echo hppa2.0-unknown-linux-gnu ;; - *) echo hppa-unknown-linux-gnu ;; - esac - exit ;; - parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-gnu - exit ;; - s390:Linux:*:* | s390x:Linux:*:*) - echo ${UNAME_MACHINE}-ibm-linux - exit ;; - sh64*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sh*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sparc:Linux:*:* | sparc64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - vax:Linux:*:*) - echo ${UNAME_MACHINE}-dec-linux-gnu - exit ;; - x86_64:Linux:*:*) - echo x86_64-unknown-linux-gnu - exit ;; - i*86:Linux:*:*) - # The BFD linker knows what the default object file format is, so - # first see if it will tell us. cd to the root directory to prevent - # problems with other programs or directories called `ld' in the path. - # Set LC_ALL=C to ensure ld outputs messages in English. - ld_supported_targets=`cd /; LC_ALL=C ld --help 2>&1 \ - | sed -ne '/supported targets:/!d - s/[ ][ ]*/ /g - s/.*supported targets: *// - s/ .*// - p'` - case "$ld_supported_targets" in - elf32-i386) - TENTATIVE="${UNAME_MACHINE}-pc-linux-gnu" - ;; - a.out-i386-linux) - echo "${UNAME_MACHINE}-pc-linux-gnuaout" - exit ;; - coff-i386) - echo "${UNAME_MACHINE}-pc-linux-gnucoff" - exit ;; - "") - # Either a pre-BFD a.out linker (linux-gnuoldld) or - # one that does not give us useful --help. - echo "${UNAME_MACHINE}-pc-linux-gnuoldld" - exit ;; - esac - # Determine whether the default compiler is a.out or elf - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - #ifdef __ELF__ - # ifdef __GLIBC__ - # if __GLIBC__ >= 2 - LIBC=gnu - # else - LIBC=gnulibc1 - # endif - # else - LIBC=gnulibc1 - # endif - #else - #if defined(__INTEL_COMPILER) || defined(__PGI) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) - LIBC=gnu - #else - LIBC=gnuaout - #endif - #endif - #ifdef __dietlibc__ - LIBC=dietlibc - #endif -EOF - eval "`$CC_FOR_BUILD -E $dummy.c 2>/dev/null | sed -n ' - /^LIBC/{ - s: ::g - p - }'`" - test x"${LIBC}" != x && { - echo "${UNAME_MACHINE}-pc-linux-${LIBC}" - exit - } - test x"${TENTATIVE}" != x && { echo "${TENTATIVE}"; exit; } - ;; - i*86:DYNIX/ptx:4*:*) - # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. - # earlier versions are messed up and put the nodename in both - # sysname and nodename. - echo i386-sequent-sysv4 - exit ;; - i*86:UNIX_SV:4.2MP:2.*) - # Unixware is an offshoot of SVR4, but it has its own version - # number series starting with 2... - # I am not positive that other SVR4 systems won't match this, - # I just have to hope. -- rms. - # Use sysv4.2uw... so that sysv4* matches it. - echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION} - exit ;; - i*86:OS/2:*:*) - # If we were able to find `uname', then EMX Unix compatibility - # is probably installed. - echo ${UNAME_MACHINE}-pc-os2-emx - exit ;; - i*86:XTS-300:*:STOP) - echo ${UNAME_MACHINE}-unknown-stop - exit ;; - i*86:atheos:*:*) - echo ${UNAME_MACHINE}-unknown-atheos - exit ;; - i*86:syllable:*:*) - echo ${UNAME_MACHINE}-pc-syllable - exit ;; - i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.0*:*) - echo i386-unknown-lynxos${UNAME_RELEASE} - exit ;; - i*86:*DOS:*:*) - echo ${UNAME_MACHINE}-pc-msdosdjgpp - exit ;; - i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*) - UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'` - if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then - echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL} - else - echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL} - fi - exit ;; - i*86:*:5:[678]*) - # UnixWare 7.x, OpenUNIX and OpenServer 6. - case `/bin/uname -X | grep "^Machine"` in - *486*) UNAME_MACHINE=i486 ;; - *Pentium) UNAME_MACHINE=i586 ;; - *Pent*|*Celeron) UNAME_MACHINE=i686 ;; - esac - echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION} - exit ;; - i*86:*:3.2:*) - if test -f /usr/options/cb.name; then - UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then - UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')` - (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486 - (/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \ - && UNAME_MACHINE=i586 - (/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \ - && UNAME_MACHINE=i686 - (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \ - && UNAME_MACHINE=i686 - echo ${UNAME_MACHINE}-pc-sco$UNAME_REL - else - echo ${UNAME_MACHINE}-pc-sysv32 - fi - exit ;; - pc:*:*:*) - # Left here for compatibility: - # uname -m prints for DJGPP always 'pc', but it prints nothing about - # the processor, so we play safe by assuming i386. - echo i386-pc-msdosdjgpp - exit ;; - Intel:Mach:3*:*) - echo i386-pc-mach3 - exit ;; - paragon:*:*:*) - echo i860-intel-osf1 - exit ;; - i860:*:4.*:*) # i860-SVR4 - if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then - echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4 - else # Add other i860-SVR4 vendors below as they are discovered. - echo i860-unknown-sysv${UNAME_RELEASE} # Unknown i860-SVR4 - fi - exit ;; - mini*:CTIX:SYS*5:*) - # "miniframe" - echo m68010-convergent-sysv - exit ;; - mc68k:UNIX:SYSTEM5:3.51m) - echo m68k-convergent-sysv - exit ;; - M680?0:D-NIX:5.3:*) - echo m68k-diab-dnix - exit ;; - M68*:*:R3V[5678]*:*) - test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;; - 3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0) - OS_REL='' - test -r /etc/.relid \ - && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` - /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4.3${OS_REL}; exit; } - /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ - && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;; - 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) - /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ - && { echo i486-ncr-sysv4; exit; } ;; - m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*) - echo m68k-unknown-lynxos${UNAME_RELEASE} - exit ;; - mc68030:UNIX_System_V:4.*:*) - echo m68k-atari-sysv4 - exit ;; - TSUNAMI:LynxOS:2.*:*) - echo sparc-unknown-lynxos${UNAME_RELEASE} - exit ;; - rs6000:LynxOS:2.*:*) - echo rs6000-unknown-lynxos${UNAME_RELEASE} - exit ;; - PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.0*:*) - echo powerpc-unknown-lynxos${UNAME_RELEASE} - exit ;; - SM[BE]S:UNIX_SV:*:*) - echo mips-dde-sysv${UNAME_RELEASE} - exit ;; - RM*:ReliantUNIX-*:*:*) - echo mips-sni-sysv4 - exit ;; - RM*:SINIX-*:*:*) - echo mips-sni-sysv4 - exit ;; - *:SINIX-*:*:*) - if uname -p 2>/dev/null >/dev/null ; then - UNAME_MACHINE=`(uname -p) 2>/dev/null` - echo ${UNAME_MACHINE}-sni-sysv4 - else - echo ns32k-sni-sysv - fi - exit ;; 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- BePC:BeOS:*:*) # BeOS running on Intel PC compatible. - echo i586-pc-beos - exit ;; - SX-4:SUPER-UX:*:*) - echo sx4-nec-superux${UNAME_RELEASE} - exit ;; - SX-5:SUPER-UX:*:*) - echo sx5-nec-superux${UNAME_RELEASE} - exit ;; - SX-6:SUPER-UX:*:*) - echo sx6-nec-superux${UNAME_RELEASE} - exit ;; - Power*:Rhapsody:*:*) - echo powerpc-apple-rhapsody${UNAME_RELEASE} - exit ;; - *:Rhapsody:*:*) - echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE} - exit ;; - *:Darwin:*:*) - UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown - case $UNAME_PROCESSOR in - unknown) UNAME_PROCESSOR=powerpc ;; - esac - echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE} - exit ;; - *:procnto*:*:* | *:QNX:[0123456789]*:*) - UNAME_PROCESSOR=`uname -p` - if test "$UNAME_PROCESSOR" = "x86"; then - UNAME_PROCESSOR=i386 - UNAME_MACHINE=pc - fi - echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE} - exit ;; - *:QNX:*:4*) - echo i386-pc-qnx - exit ;; - NSE-?:NONSTOP_KERNEL:*:*) - echo nse-tandem-nsk${UNAME_RELEASE} - exit ;; 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Generated from configure.in by autoheader. */ - -/* Define to 1 if you have the header file. */ -#undef HAVE_DLFCN_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_INTTYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_MEMORY_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDINT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDLIB_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRINGS_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRING_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_STAT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_TYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_UNISTD_H - -/* Define to the sub-directory in which libtool stores uninstalled libraries. - */ -#undef LT_OBJDIR - -/* Define to 1 if your C compiler doesn't accept -c and -o together. */ -#undef NO_MINUS_C_MINUS_O - -/* Name of package */ -#undef PACKAGE - -/* Define to the address where bug reports for this package should be sent. */ -#undef PACKAGE_BUGREPORT - -/* Define to the full name of this package. */ -#undef PACKAGE_NAME - -/* Define to the full name and version of this package. */ -#undef PACKAGE_STRING - -/* Define to the one symbol short name of this package. */ -#undef PACKAGE_TARNAME - -/* Define to the version of this package. */ -#undef PACKAGE_VERSION - -/* The size of `int', as computed by sizeof. */ -#undef SIZEOF_INT - -/* The size of `long', as computed by sizeof. */ -#undef SIZEOF_LONG - -/* The size of `long long', as computed by sizeof. */ -#undef SIZEOF_LONG_LONG - -/* The size of `short', as computed by sizeof. */ -#undef SIZEOF_SHORT - -/* Define to 1 if you have the ANSI C header files. */ -#undef STDC_HEADERS - -/* Version number of package */ -#undef VERSION - -/* Define to empty if `const' does not conform to ANSI C. */ -#undef const diff --git a/ExternalLibs/libogg-1.2.0/config.sub b/ExternalLibs/libogg-1.2.0/config.sub deleted file mode 100644 index 387c18d..0000000 --- a/ExternalLibs/libogg-1.2.0/config.sub +++ /dev/null @@ -1,1608 +0,0 @@ -#! /bin/sh -# Configuration validation subroutine script. -# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, -# 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, -# Inc. - -timestamp='2006-07-02' - -# This file is (in principle) common to ALL GNU software. -# The presence of a machine in this file suggests that SOME GNU software -# can handle that machine. 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See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - - -# Please send patches to . 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- m6811 | m68hc11 | m6812 | m68hc12) - # Motorola 68HC11/12. - basic_machine=$basic_machine-unknown - os=-none - ;; - m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k) - ;; - ms1) - basic_machine=mt-unknown - ;; - - # We use `pc' rather than `unknown' - # because (1) that's what they normally are, and - # (2) the word "unknown" tends to confuse beginning users. - i*86 | x86_64) - basic_machine=$basic_machine-pc - ;; - # Object if more than one company name word. - *-*-*) - echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2 - exit 1 - ;; - # Recognize the basic CPU types with company name. - 580-* \ - | a29k-* \ - | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \ - | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \ - | alphapca5[67]-* | alpha64pca5[67]-* | arc-* \ - | arm-* | armbe-* | armle-* | armeb-* | armv*-* \ - | avr-* | avr32-* \ - | bfin-* | bs2000-* \ - | c[123]* | c30-* | [cjt]90-* | c4x-* | c54x-* | c55x-* | c6x-* \ - | clipper-* | craynv-* | cydra-* \ - | d10v-* | d30v-* | dlx-* \ - | elxsi-* \ - | f30[01]-* | f700-* | fr30-* | frv-* | fx80-* \ - | h8300-* | h8500-* \ - | hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \ - | i*86-* | i860-* | i960-* | ia64-* \ - | ip2k-* | iq2000-* \ - | m32c-* | m32r-* | m32rle-* \ - | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \ - | m88110-* | m88k-* | maxq-* | mcore-* \ - | mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \ - | mips16-* \ - | mips64-* | mips64el-* \ - | mips64vr-* | mips64vrel-* \ - | mips64orion-* | mips64orionel-* \ - | mips64vr4100-* | mips64vr4100el-* \ - | mips64vr4300-* | mips64vr4300el-* \ - | mips64vr5000-* | mips64vr5000el-* \ - | mips64vr5900-* | mips64vr5900el-* \ - | mipsisa32-* | mipsisa32el-* \ - | mipsisa32r2-* | mipsisa32r2el-* \ - | mipsisa64-* | mipsisa64el-* \ - | mipsisa64r2-* | mipsisa64r2el-* \ - | mipsisa64sb1-* | mipsisa64sb1el-* \ - | mipsisa64sr71k-* | mipsisa64sr71kel-* \ - | mipstx39-* | mipstx39el-* \ - | mmix-* \ - | mt-* \ - | msp430-* \ - | nios-* | nios2-* \ - | none-* | np1-* | ns16k-* | ns32k-* \ - | orion-* \ - | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \ - | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* | ppcbe-* \ - | pyramid-* \ - | romp-* | rs6000-* \ - | sh-* | sh[1234]-* | sh[24]a-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \ - | shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \ - | sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \ - | sparclite-* \ - | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | strongarm-* | sv1-* | sx?-* \ - | tahoe-* | thumb-* \ - | tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \ - | tron-* \ - | v850-* | v850e-* | vax-* \ - | we32k-* \ - | x86-* | x86_64-* | xps100-* | xscale-* | xscalee[bl]-* \ - | xstormy16-* | xtensa-* \ - | ymp-* \ - | z8k-*) - ;; - # Recognize the various machine names and aliases which stand - # for a CPU type and a company and sometimes even an OS. - 386bsd) - basic_machine=i386-unknown - os=-bsd - ;; - 3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc) - basic_machine=m68000-att - ;; - 3b*) - basic_machine=we32k-att - ;; - a29khif) - basic_machine=a29k-amd - os=-udi - ;; - abacus) - basic_machine=abacus-unknown - ;; - adobe68k) - basic_machine=m68010-adobe - os=-scout - ;; - alliant | fx80) - basic_machine=fx80-alliant - ;; - altos | altos3068) - basic_machine=m68k-altos - ;; - am29k) - basic_machine=a29k-none - os=-bsd - ;; - amd64) - basic_machine=x86_64-pc - ;; - amd64-*) - basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - amdahl) - basic_machine=580-amdahl - os=-sysv - ;; - amiga | amiga-*) - basic_machine=m68k-unknown - ;; - amigaos | amigados) - basic_machine=m68k-unknown - os=-amigaos - ;; - amigaunix | amix) - basic_machine=m68k-unknown - os=-sysv4 - ;; - apollo68) - basic_machine=m68k-apollo - os=-sysv - ;; - apollo68bsd) - basic_machine=m68k-apollo - os=-bsd - ;; - aux) - basic_machine=m68k-apple - os=-aux - ;; - balance) - basic_machine=ns32k-sequent - os=-dynix - ;; - c90) - basic_machine=c90-cray - os=-unicos - ;; - convex-c1) - basic_machine=c1-convex - os=-bsd - ;; - convex-c2) - basic_machine=c2-convex - os=-bsd - ;; - convex-c32) - basic_machine=c32-convex - os=-bsd - ;; - convex-c34) - basic_machine=c34-convex - os=-bsd - ;; - convex-c38) - basic_machine=c38-convex - os=-bsd - ;; - cray | j90) - basic_machine=j90-cray - os=-unicos - ;; - craynv) - basic_machine=craynv-cray - os=-unicosmp - ;; - cr16c) - basic_machine=cr16c-unknown - os=-elf - ;; - crds | unos) - basic_machine=m68k-crds - ;; - crisv32 | crisv32-* | etraxfs*) - basic_machine=crisv32-axis - ;; - cris | cris-* | etrax*) - basic_machine=cris-axis - ;; - crx) - basic_machine=crx-unknown - os=-elf - ;; - da30 | da30-*) - basic_machine=m68k-da30 - ;; - decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn) - basic_machine=mips-dec - ;; - decsystem10* | dec10*) - basic_machine=pdp10-dec - os=-tops10 - ;; - decsystem20* | dec20*) - basic_machine=pdp10-dec - os=-tops20 - ;; - delta | 3300 | motorola-3300 | motorola-delta \ - | 3300-motorola | delta-motorola) - basic_machine=m68k-motorola - ;; - delta88) - basic_machine=m88k-motorola - os=-sysv3 - ;; - djgpp) - basic_machine=i586-pc - os=-msdosdjgpp - ;; - dpx20 | dpx20-*) - basic_machine=rs6000-bull - os=-bosx - ;; - dpx2* | dpx2*-bull) - basic_machine=m68k-bull - os=-sysv3 - ;; - ebmon29k) - basic_machine=a29k-amd - os=-ebmon - ;; - elxsi) - basic_machine=elxsi-elxsi - os=-bsd - ;; - encore | umax | mmax) - basic_machine=ns32k-encore - ;; - es1800 | OSE68k | ose68k | ose | OSE) - basic_machine=m68k-ericsson - os=-ose - ;; - fx2800) - basic_machine=i860-alliant - ;; - genix) - basic_machine=ns32k-ns - ;; - gmicro) - basic_machine=tron-gmicro - os=-sysv - ;; - go32) - basic_machine=i386-pc - os=-go32 - ;; - h3050r* | hiux*) - basic_machine=hppa1.1-hitachi - os=-hiuxwe2 - ;; - h8300hms) - basic_machine=h8300-hitachi - os=-hms - ;; - h8300xray) - basic_machine=h8300-hitachi - os=-xray - ;; - h8500hms) - basic_machine=h8500-hitachi - os=-hms - ;; - harris) - basic_machine=m88k-harris - os=-sysv3 - ;; - hp300-*) - basic_machine=m68k-hp - ;; - hp300bsd) - basic_machine=m68k-hp - os=-bsd - ;; - hp300hpux) - basic_machine=m68k-hp - os=-hpux - ;; - hp3k9[0-9][0-9] | hp9[0-9][0-9]) - basic_machine=hppa1.0-hp - ;; - hp9k2[0-9][0-9] | hp9k31[0-9]) - basic_machine=m68000-hp - ;; - hp9k3[2-9][0-9]) - basic_machine=m68k-hp - ;; - hp9k6[0-9][0-9] | hp6[0-9][0-9]) - basic_machine=hppa1.0-hp - ;; - hp9k7[0-79][0-9] | hp7[0-79][0-9]) - basic_machine=hppa1.1-hp - ;; - hp9k78[0-9] | hp78[0-9]) - # FIXME: really hppa2.0-hp - basic_machine=hppa1.1-hp - ;; - hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893) - # FIXME: really hppa2.0-hp - basic_machine=hppa1.1-hp - ;; - hp9k8[0-9][13679] | hp8[0-9][13679]) - basic_machine=hppa1.1-hp - ;; - hp9k8[0-9][0-9] | hp8[0-9][0-9]) - basic_machine=hppa1.0-hp - ;; - hppa-next) - os=-nextstep3 - ;; - hppaosf) - basic_machine=hppa1.1-hp - os=-osf - ;; - hppro) - basic_machine=hppa1.1-hp - os=-proelf - ;; - i370-ibm* | ibm*) - basic_machine=i370-ibm - ;; -# I'm not sure what "Sysv32" means. Should this be sysv3.2? - i*86v32) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` - os=-sysv32 - ;; - i*86v4*) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` - os=-sysv4 - ;; - i*86v) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` - os=-sysv - ;; - i*86sol2) - basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` - os=-solaris2 - ;; - i386mach) - basic_machine=i386-mach - os=-mach - ;; - i386-vsta | vsta) - basic_machine=i386-unknown - os=-vsta - ;; - iris | iris4d) - basic_machine=mips-sgi - case $os in - -irix*) - ;; - *) - os=-irix4 - ;; - esac - ;; - isi68 | isi) - basic_machine=m68k-isi - os=-sysv - ;; - m88k-omron*) - basic_machine=m88k-omron - ;; - magnum | m3230) - basic_machine=mips-mips - os=-sysv - ;; - merlin) - basic_machine=ns32k-utek - os=-sysv - ;; - mingw32) - basic_machine=i386-pc - os=-mingw32 - ;; - miniframe) - basic_machine=m68000-convergent - ;; - *mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*) - basic_machine=m68k-atari - os=-mint - ;; - mips3*-*) - basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'` - ;; - mips3*) - basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown - ;; - monitor) - basic_machine=m68k-rom68k - os=-coff - ;; - morphos) - basic_machine=powerpc-unknown - os=-morphos - ;; - msdos) - basic_machine=i386-pc - os=-msdos - ;; - ms1-*) - basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'` - ;; - mvs) - basic_machine=i370-ibm - os=-mvs - ;; - ncr3000) - basic_machine=i486-ncr - os=-sysv4 - ;; - netbsd386) - basic_machine=i386-unknown - os=-netbsd - ;; - netwinder) - basic_machine=armv4l-rebel - os=-linux - ;; - news | news700 | news800 | news900) - basic_machine=m68k-sony - os=-newsos - ;; - news1000) - basic_machine=m68030-sony - os=-newsos - ;; - news-3600 | risc-news) - basic_machine=mips-sony - os=-newsos - ;; - necv70) - basic_machine=v70-nec - os=-sysv - ;; - next | m*-next ) - basic_machine=m68k-next - case $os in - -nextstep* ) - ;; - -ns2*) - os=-nextstep2 - ;; - *) - os=-nextstep3 - ;; - esac - ;; - nh3000) - basic_machine=m68k-harris - os=-cxux - ;; - nh[45]000) - basic_machine=m88k-harris - os=-cxux - ;; - nindy960) - basic_machine=i960-intel - os=-nindy - ;; - mon960) - basic_machine=i960-intel - os=-mon960 - ;; - nonstopux) - basic_machine=mips-compaq - os=-nonstopux - ;; - np1) - basic_machine=np1-gould - ;; - nsr-tandem) - basic_machine=nsr-tandem - ;; - op50n-* | op60c-*) - basic_machine=hppa1.1-oki - os=-proelf - ;; - openrisc | openrisc-*) - basic_machine=or32-unknown - ;; - os400) - basic_machine=powerpc-ibm - os=-os400 - ;; - OSE68000 | ose68000) - basic_machine=m68000-ericsson - os=-ose - ;; - os68k) - basic_machine=m68k-none - os=-os68k - ;; - pa-hitachi) - basic_machine=hppa1.1-hitachi - os=-hiuxwe2 - ;; - paragon) - basic_machine=i860-intel - os=-osf - ;; - pbd) - basic_machine=sparc-tti - ;; - pbb) - basic_machine=m68k-tti - ;; - pc532 | pc532-*) - basic_machine=ns32k-pc532 - ;; - pc98) - basic_machine=i386-pc - ;; - pc98-*) - basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - pentium | p5 | k5 | k6 | nexgen | viac3) - basic_machine=i586-pc - ;; - pentiumpro | p6 | 6x86 | athlon | athlon_*) - basic_machine=i686-pc - ;; - pentiumii | pentium2 | pentiumiii | pentium3) - basic_machine=i686-pc - ;; - pentium4) - basic_machine=i786-pc - ;; - pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*) - basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - pentiumpro-* | p6-* | 6x86-* | athlon-*) - basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*) - basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - pentium4-*) - basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - pn) - basic_machine=pn-gould - ;; - power) basic_machine=power-ibm - ;; - ppc) basic_machine=powerpc-unknown - ;; - ppc-*) basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - ppcle | powerpclittle | ppc-le | powerpc-little) - basic_machine=powerpcle-unknown - ;; - ppcle-* | powerpclittle-*) - basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - ppc64) basic_machine=powerpc64-unknown - ;; - ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - ppc64le | powerpc64little | ppc64-le | powerpc64-little) - basic_machine=powerpc64le-unknown - ;; - ppc64le-* | powerpc64little-*) - basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'` - ;; - ps2) - basic_machine=i386-ibm - ;; - pw32) - basic_machine=i586-unknown - os=-pw32 - ;; - rdos) - basic_machine=i386-pc - os=-rdos - ;; - rom68k) - basic_machine=m68k-rom68k - os=-coff - ;; - rm[46]00) - basic_machine=mips-siemens - ;; - rtpc | rtpc-*) - basic_machine=romp-ibm - ;; - s390 | s390-*) - basic_machine=s390-ibm - ;; - s390x | s390x-*) - basic_machine=s390x-ibm - ;; - sa29200) - basic_machine=a29k-amd - os=-udi - ;; - sb1) - basic_machine=mipsisa64sb1-unknown - ;; - sb1el) - basic_machine=mipsisa64sb1el-unknown - ;; - sei) - basic_machine=mips-sei - os=-seiux - ;; - sequent) - basic_machine=i386-sequent - ;; - sh) - basic_machine=sh-hitachi - os=-hms - ;; - sh64) - basic_machine=sh64-unknown - ;; - sparclite-wrs | simso-wrs) - basic_machine=sparclite-wrs - os=-vxworks - ;; - sps7) - basic_machine=m68k-bull - os=-sysv2 - ;; - spur) - basic_machine=spur-unknown - ;; - st2000) - basic_machine=m68k-tandem - ;; - stratus) - basic_machine=i860-stratus - os=-sysv4 - ;; - sun2) - basic_machine=m68000-sun - ;; - sun2os3) - basic_machine=m68000-sun - os=-sunos3 - ;; - sun2os4) - basic_machine=m68000-sun - os=-sunos4 - ;; - sun3os3) - basic_machine=m68k-sun - os=-sunos3 - ;; - sun3os4) - basic_machine=m68k-sun - os=-sunos4 - ;; - sun4os3) - basic_machine=sparc-sun - os=-sunos3 - ;; - sun4os4) - basic_machine=sparc-sun - os=-sunos4 - ;; - sun4sol2) - basic_machine=sparc-sun - os=-solaris2 - ;; - sun3 | sun3-*) - basic_machine=m68k-sun - ;; - sun4) - basic_machine=sparc-sun - ;; - sun386 | sun386i | roadrunner) - basic_machine=i386-sun - ;; - sv1) - basic_machine=sv1-cray - os=-unicos - ;; - symmetry) - basic_machine=i386-sequent - os=-dynix - ;; - t3e) - basic_machine=alphaev5-cray - os=-unicos - ;; 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Ogg logical bitstream framing

- -

Ogg bitstreams

- -

The Ogg transport bitstream is designed to provide framing, error -protection and seeking structure for higher-level codec streams that -consist of raw, unencapsulated data packets, such as the Vorbis audio -codec or Theora video codec.

- -

Application example: Vorbis

- -

Vorbis encodes short-time blocks of PCM data into raw packets of -bit-packed data. These raw packets may be used directly by transport -mechanisms that provide their own framing and packet-separation -mechanisms (such as UDP datagrams). For stream based storage (such as -files) and transport (such as TCP streams or pipes), Vorbis uses the -Ogg bitstream format to provide framing/sync, sync recapture -after error, landmarks during seeking, and enough information to -properly separate data back into packets at the original packet -boundaries without relying on decoding to find packet boundaries.

- -

Design constraints for Ogg bitstreams

- -
    -
  1. True streaming; we must not need to seek to build a 100% - complete bitstream.
    2. -
  2. Use no more than approximately 1-2% of bitstream bandwidth for - packet boundary marking, high-level framing, sync and seeking.
    3. -
  3. Specification of absolute position within the original sample - stream.
    4. -
  4. Simple mechanism to ease limited editing, such as a simplified - concatenation mechanism.
    5. -
  5. Detection of corruption, recapture after error and direct, random - access to data at arbitrary positions in the bitstream.
    6. -
- -

Logical and Physical Bitstreams

- -

A logical Ogg bitstream is a contiguous stream of -sequential pages belonging only to the logical bitstream. A -physical Ogg bitstream is constructed from one or more -than one logical Ogg bitstream (the simplest physical bitstream -is simply a single logical bitstream). We describe below the exact -formatting of an Ogg logical bitstream. Combining logical -bitstreams into more complex physical bitstreams is described in the -Ogg bitstream overview. The exact -mapping of raw Vorbis packets into a valid Ogg Vorbis physical -bitstream is described in the Vorbis I Specification.

- -

Bitstream structure

- -

An Ogg stream is structured by dividing incoming packets into -segments of up to 255 bytes and then wrapping a group of contiguous -packet segments into a variable length page preceded by a page -header. Both the header size and page size are variable; the page -header contains sizing information and checksum data to determine -header/page size and data integrity.

- -

The bitstream is captured (or recaptured) by looking for the beginning -of a page, specifically the capture pattern. Once the capture pattern -is found, the decoder verifies page sync and integrity by computing -and comparing the checksum. At that point, the decoder can extract the -packets themselves.

- -

Packet segmentation

- -

Packets are logically divided into multiple segments before encoding -into a page. Note that the segmentation and fragmentation process is a -logical one; it's used to compute page header values and the original -page data need not be disturbed, even when a packet spans page -boundaries.

- -

The raw packet is logically divided into [n] 255 byte segments and a -last fractional segment of < 255 bytes. A packet size may well -consist only of the trailing fractional segment, and a fractional -segment may be zero length. These values, called "lacing values" are -then saved and placed into the header segment table.

- -

An example should make the basic concept clear:

- -
-
-raw packet:
-  ___________________________________________
- |______________packet data__________________| 753 bytes
-
-lacing values for page header segment table: 255,255,243
-
-
- -

We simply add the lacing values for the total size; the last lacing -value for a packet is always the value that is less than 255. Note -that this encoding both avoids imposing a maximum packet size as well -as imposing minimum overhead on small packets (as opposed to, eg, -simply using two bytes at the head of every packet and having a max -packet size of 32k. Small packets (<255, the typical case) are -penalized with twice the segmentation overhead). Using the lacing -values as suggested, small packets see the minimum possible -byte-aligned overhead (1 byte) and large packets, over 512 bytes or -so, see a fairly constant ~.5% overhead on encoding space.

- -

Note that a lacing value of 255 implies that a second lacing value -follows in the packet, and a value of < 255 marks the end of the -packet after that many additional bytes. A packet of 255 bytes (or a -multiple of 255 bytes) is terminated by a lacing value of 0:

- -

-raw packet:
-  _______________________________
- |________packet data____________|          255 bytes
-
-lacing values: 255, 0
-
- -

Note also that a 'nil' (zero length) packet is not an error; it -consists of nothing more than a lacing value of zero in the header.

- -

Packets spanning pages

- -

Packets are not restricted to beginning and ending within a page, -although individual segments are, by definition, required to do so. -Packets are not restricted to a maximum size, although excessively -large packets in the data stream are discouraged; the Ogg -bitstream specification strongly recommends nominal page size of -approximately 4-8kB (large packets are foreseen as being useful for -initialization data at the beginning of a logical bitstream).

- -

After segmenting a packet, the encoder may decide not to place all the -resulting segments into the current page; to do so, the encoder places -the lacing values of the segments it wishes to belong to the current -page into the current segment table, then finishes the page. The next -page is begun with the first value in the segment table belonging to -the next packet segment, thus continuing the packet (data in the -packet body must also correspond properly to the lacing values in the -spanned pages. The segment data in the first packet corresponding to -the lacing values of the first page belong in that page; packet -segments listed in the segment table of the following page must begin -the page body of the subsequent page).

- -

The last mechanic to spanning a page boundary is to set the header -flag in the new page to indicate that the first lacing value in the -segment table continues rather than begins a packet; a header flag of -0x01 is set to indicate a continued packet. Although mandatory, it -is not actually algorithmically necessary; one could inspect the -preceding segment table to determine if the packet is new or -continued. Adding the information to the packet_header flag allows a -simpler design (with no overhead) that needs only inspect the current -page header after frame capture. This also allows faster error -recovery in the event that the packet originates in a corrupt -preceding page, implying that the previous page's segment table -cannot be trusted.

- -

Note that a packet can span an arbitrary number of pages; the above -spanning process is repeated for each spanned page boundary. Also a -'zero termination' on a packet size that is an even multiple of 255 -must appear even if the lacing value appears in the next page as a -zero-length continuation of the current packet. The header flag -should be set to 0x01 to indicate that the packet spanned, even though -the span is a nil case as far as data is concerned.

- -

The encoding looks odd, but is properly optimized for speed and the -expected case of the majority of packets being between 50 and 200 -bytes (note that it is designed such that packets of wildly different -sizes can be handled within the model; placing packet size -restrictions on the encoder would have only slightly simplified design -in page generation and increased overall encoder complexity).

- -

The main point behind tracking individual packets (and packet -segments) is to allow more flexible encoding tricks that requiring -explicit knowledge of packet size. An example is simple bandwidth -limiting, implemented by simply truncating packets in the nominal case -if the packet is arranged so that the least sensitive portion of the -data comes last.

- -

Page header

- -

The headering mechanism is designed to avoid copying and re-assembly -of the packet data (ie, making the packet segmentation process a -logical one); the header can be generated directly from incoming -packet data. The encoder buffers packet data until it finishes a -complete page at which point it writes the header followed by the -buffered packet segments.

- -

capture_pattern

- -

A header begins with a capture pattern that simplifies identifying -pages; once the decoder has found the capture pattern it can do a more -intensive job of verifying that it has in fact found a page boundary -(as opposed to an inadvertent coincidence in the byte stream).

- -

- byte value
-
-  0  0x4f 'O'
-  1  0x67 'g'
-  2  0x67 'g'
-  3  0x53 'S'  
-
- -

stream_structure_version

- -

The capture pattern is followed by the stream structure revision:

- -

- byte value
-
-  4  0x00
-
- -

header_type_flag

- -

The header type flag identifies this page's context in the bitstream:

- -

- byte value
-
-  5  bitflags: 0x01: unset = fresh packet
-	               set = continued packet
-	       0x02: unset = not first page of logical bitstream
-                       set = first page of logical bitstream (bos)
-	       0x04: unset = not last page of logical bitstream
-                       set = last page of logical bitstream (eos)
-
- -

absolute granule position

- -

(This is packed in the same way the rest of Ogg data is packed; LSb -of LSB first. Note that the 'position' data specifies a 'sample' -number (eg, in a CD quality sample is four octets, 16 bits for left -and 16 bits for right; in video it would likely be the frame number. -It is up to the specific codec in use to define the semantic meaning -of the granule position value). The position specified is the total -samples encoded after including all packets finished on this page -(packets begun on this page but continuing on to the next page do not -count). The rationale here is that the position specified in the -frame header of the last page tells how long the data coded by the -bitstream is. A truncated stream will still return the proper number -of samples that can be decoded fully.

- -

A special value of '-1' (in two's complement) indicates that no packets -finish on this page.

- -

- byte value
-
-  6  0xXX LSB
-  7  0xXX
-  8  0xXX
-  9  0xXX
- 10  0xXX
- 11  0xXX
- 12  0xXX
- 13  0xXX MSB
-
- -

stream serial number

- -

Ogg allows for separate logical bitstreams to be mixed at page -granularity in a physical bitstream. The most common case would be -sequential arrangement, but it is possible to interleave pages for -two separate bitstreams to be decoded concurrently. The serial -number is the means by which pages physical pages are associated with -a particular logical stream. Each logical stream must have a unique -serial number within a physical stream:

- -

- byte value
-
- 14  0xXX LSB
- 15  0xXX
- 16  0xXX
- 17  0xXX MSB
-
- -

page sequence no

- -

Page counter; lets us know if a page is lost (useful where packets -span page boundaries).

- -

- byte value
-
- 18  0xXX LSB
- 19  0xXX
- 20  0xXX
- 21  0xXX MSB
-
- -

page checksum

- -

32 bit CRC value (direct algorithm, initial val and final XOR = 0, -generator polynomial=0x04c11db7). The value is computed over the -entire header (with the CRC field in the header set to zero) and then -continued over the page. The CRC field is then filled with the -computed value.

- -

(A thorough discussion of CRC algorithms can be found in "A -Painless Guide to CRC Error Detection Algorithms" by Ross -Williams ross@ross.net.)

- -

- byte value
-
- 22  0xXX LSB
- 23  0xXX
- 24  0xXX
- 25  0xXX MSB
-
- -

page_segments

- -

The number of segment entries to appear in the segment table. The -maximum number of 255 segments (255 bytes each) sets the maximum -possible physical page size at 65307 bytes or just under 64kB (thus -we know that a header corrupted so as destroy sizing/alignment -information will not cause a runaway bitstream. We'll read in the -page according to the corrupted size information that's guaranteed to -be a reasonable size regardless, notice the checksum mismatch, drop -sync and then look for recapture).

- -

- byte value
-
- 26 0x00-0xff (0-255)
-
- -

segment_table (containing packet lacing values)

- -

The lacing values for each packet segment physically appearing in -this page are listed in contiguous order.

- -

- byte value
-
- 27 0x00-0xff (0-255)
- [...]
- n  0x00-0xff (0-255, n=page_segments+26)
-
- -

Total page size is calculated directly from the known header size and -lacing values in the segment table. Packet data segments follow -immediately after the header.

- -

Page headers typically impose a flat .25-.5% space overhead assuming -nominal ~8k page sizes. The segmentation table needed for exact -packet recovery in the streaming layer adds approximately .5-1% -nominal assuming expected encoder behavior in the 44.1kHz, 128kbps -stereo encodings.

- - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/index.html b/ExternalLibs/libogg-1.2.0/doc/index.html deleted file mode 100644 index 900ef73..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/index.html +++ /dev/null @@ -1,105 +0,0 @@ - - - - - -Ogg Documentation - - - - - - - - - -

Ogg Documentation

- -

Ogg programming documentation

- - - -

Ogg bitsream documentation

- - - -

RFC documentation

- - - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.am b/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.am deleted file mode 100644 index c83f4e7..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.am +++ /dev/null @@ -1,27 +0,0 @@ -## Process this file with automake to produce Makefile.in - -docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)/ogg - -doc_DATA = bitpacking.html datastructures.html decoding.html encoding.html\ - general.html index.html ogg_packet.html ogg_packet_clear.html\ - ogg_page.html ogg_page_bos.html ogg_page_checksum_set.html\ - ogg_page_continued.html ogg_page_eos.html ogg_page_granulepos.html\ - ogg_page_packets.html ogg_page_pageno.html ogg_page_serialno.html\ - ogg_page_version.html ogg_stream_clear.html ogg_stream_destroy.html\ - ogg_stream_eos.html ogg_stream_flush.html ogg_stream_init.html\ - ogg_stream_packetin.html ogg_stream_packetout.html\ - ogg_stream_packetpeek.html ogg_stream_pagein.html\ - ogg_stream_pageout.html ogg_stream_reset.html\ - ogg_stream_reset_serialno.html ogg_stream_state.html\ - ogg_sync_buffer.html ogg_sync_clear.html ogg_sync_destroy.html\ - ogg_sync_init.html ogg_sync_pageout.html ogg_sync_pageseek.html\ - ogg_sync_reset.html ogg_sync_state.html ogg_sync_wrote.html\ - oggpack_adv.html oggpack_adv1.html oggpack_bits.html\ - oggpack_buffer.html oggpack_bytes.html oggpack_get_buffer.html\ - oggpack_look.html oggpack_look1.html oggpack_read.html\ - oggpack_read1.html oggpack_readinit.html oggpack_reset.html\ - oggpack_write.html oggpack_writealign.html oggpack_writeclear.html\ - oggpack_writecopy.html oggpack_writeinit.html oggpack_writetrunc.html\ - overview.html reference.html style.css - -EXTRA_DIST = $(doc_DATA) diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.in b/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.in deleted file mode 100644 index 01d8084..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/Makefile.in +++ /dev/null @@ -1,383 +0,0 @@ -# Makefile.in generated by automake 1.9.6 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005 Free Software Foundation, Inc. -# This Makefile.in is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -@SET_MAKE@ - -srcdir = @srcdir@ -top_srcdir = @top_srcdir@ -VPATH = @srcdir@ -pkgdatadir = $(datadir)/@PACKAGE@ -pkglibdir = $(libdir)/@PACKAGE@ -pkgincludedir = $(includedir)/@PACKAGE@ -top_builddir = ../.. -am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd -INSTALL = @INSTALL@ -install_sh_DATA = $(install_sh) -c -m 644 -install_sh_PROGRAM = $(install_sh) -c -install_sh_SCRIPT = $(install_sh) -c -INSTALL_HEADER = $(INSTALL_DATA) -transform = $(program_transform_name) -NORMAL_INSTALL = : -PRE_INSTALL = : -POST_INSTALL = : -NORMAL_UNINSTALL = : -PRE_UNINSTALL = : -POST_UNINSTALL = : -build_triplet = @build@ -host_triplet = @host@ -subdir = doc/libogg -DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in -ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 -am__aclocal_m4_deps = $(top_srcdir)/configure.in -am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ - $(ACLOCAL_M4) -mkinstalldirs = $(install_sh) -d -CONFIG_HEADER = $(top_builddir)/config.h -CONFIG_CLEAN_FILES = -SOURCES = -DIST_SOURCES = -am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; 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libogg documentation

libogg release 1.2.0 - 20100325

- -

Bitpacking Functions

-

Libogg contains a basic bitpacking library that is useful for manipulating data within a buffer. -

-All the libogg specific functions are declared in "ogg/ogg.h". -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
functionpurpose
oggpack_writeinitInitializes a buffer for writing using this bitpacking library.
oggpack_writecheckAsynchronously checks error status of bitpacker write buffer.
oggpack_resetClears and resets the buffer to the initial position.
oggpack_writeclearFrees the memory used by the buffer.
oggpack_readinitInitializes a buffer for reading using this bitpacking library.
oggpack_writeWrites bytes to the specified location within the buffer.
oggpack_lookLook at a specified number of bits, <=32, without advancing the location pointer.
oggpack_look1Looks at one bit without advancing the location pointer.
oggpack_advAdvances the location pointer by a specified number of bits.
oggpack_adv1Advances the location pointer by one bit.
oggpack_readReads a specified number of bits from the buffer.
oggpack_read1Reads one bit from the buffer.
oggpack_bytesReturns the total number of bytes contained within the buffer.
oggpack_bitsReturns the total number of bits contained within the buffer.
oggpack_get_bufferReturns a pointer to the buffer encapsulated within the oggpack_buffer struct.
- -

-

- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/datastructures.html b/ExternalLibs/libogg-1.2.0/doc/libogg/datastructures.html deleted file mode 100644 index b339a0a..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/datastructures.html +++ /dev/null @@ -1,59 +0,0 @@ - - - -libogg - Base Data Structures - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

Base Data Structures

-

Libogg uses several data structures to hold data and state information. -

-All the libogg specific data structures are declared in "ogg/ogg.h". -

- - - - - - - - - - - - - - - - - - - - - - -
datatypepurpose
ogg_pageThis structure encapsulates data into one ogg bitstream page.
ogg_stream_stateThis structure contains current encode/decode data for a logical bitstream.
ogg_packetThis structure encapsulates the data and metadata for a single Ogg packet.
ogg_sync_stateContains bitstream synchronization information.
- -

-

- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/decoding.html b/ExternalLibs/libogg-1.2.0/doc/libogg/decoding.html deleted file mode 100644 index 322d4a9..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/decoding.html +++ /dev/null @@ -1,104 +0,0 @@ - - - -libogg - Decoding - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

Decoding

-

Libogg contains a set of functions used in the decoding process. -

-All the libogg specific functions are declared in "ogg/ogg.h". -

-

Decoding is based around the ogg synchronization layer. The ogg_sync_state struct coordinates between incoming data and the decoder. We read data into the synchronization layer, submit the data to the stream, and output raw packets to the decoder. -

Decoding through the Ogg layer follows a specific logical sequence. A read loop follows these logical steps: -

-

In practice, streams are more complex, and Ogg also must handle headers, incomplete or dropped pages, and other errors in input. -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
functionpurpose
ogg_sync_initInitializes an Ogg bitstream.
ogg_sync_clearClears the status information from the synchronization struct. -
ogg_sync_resetResets the synchronization status to initial values.
ogg_sync_destroyFrees the synchronization struct.
ogg_sync_checkCheck for asynchronous errors.
ogg_sync_bufferExposes a buffer from the synchronization layer in order to read data.
ogg_sync_wroteTells the synchronization layer how many bytes were written into the buffer.
ogg_sync_pageseekFinds the borders of pages and resynchronizes the stream.
ogg_sync_pageoutOutputs a page from the synchronization layer.
ogg_stream_pageinSubmits a complete page to the stream layer.
ogg_stream_packetoutOutputs a packet to the codec-specific decoding engine.
ogg_stream_packetpeekProvides access to the next packet in the bitstream without -advancing decoding.
- -

-

- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/encoding.html b/ExternalLibs/libogg-1.2.0/doc/libogg/encoding.html deleted file mode 100644 index 61a650f..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/encoding.html +++ /dev/null @@ -1,68 +0,0 @@ - - - -libogg - Encoding - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

Encoding

-

Libogg contains a set of functions used in the encoding process. -

-All the libogg specific functions are declared in "ogg/ogg.h". -

-

When encoding, the encoding engine will output raw packets which must be placed into an Ogg bitstream. -

Raw packets are inserted into the stream, and an ogg_page is output when enough packets have been written to create a full page. The pages output are pointers to buffered packet segments, and can then be written out and saved as an ogg stream. -

There are a couple of basic steps: -

    -
  • Use the encoding engine to produce a raw packet of data. -
  • Call ogg_stream_packetin to submit a raw packet to the stream. -
  • Use ogg_stream_pageout to output a page, if enough data has been submitted. Otherwise, continue submitting data. -
-

- - - - - - - - - - - - - - - - - - - - -
functionpurpose
ogg_stream_packetinSubmits a raw packet to the streaming layer, so that it can be formed into a page.
ogg_stream_ioveciniovec version of ogg_stream_packetin() above.
ogg_stream_pageoutOutputs a completed page if the stream contains enough packets to form a full page. -
ogg_stream_flushForces any remaining packets in the stream to be returned as a page of any size. -
- -

-
- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/general.html b/ExternalLibs/libogg-1.2.0/doc/libogg/general.html deleted file mode 100644 index 59de3f3..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/general.html +++ /dev/null @@ -1,109 +0,0 @@ - - - -libogg - General Functions - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

General Functions

-

Libogg contains several functions which are generally useful when using Ogg streaming, whether encoding or decoding. -

-All the libogg specific functions are declared in "ogg/ogg.h". -

-

These functions can be used to manipulate some of the basic elements of Ogg - streams and pages. Streams and pages are important during both the encode and decode process. -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
functionpurpose
ogg_stream_initInitializes an Ogg bitstream.
ogg_stream_clearClears the storage within the Ogg stream, but does not free the stream itself. -
ogg_stream_resetResets the stream status to its initial position.
ogg_stream_destroyFrees the entire Ogg stream.
ogg_stream_checkCheck for asyncronous errors.
ogg_stream_eosIndicates whether we are at the end of the stream.
ogg_page_versionReturns the version of ogg_page that this stream/page uses
ogg_page_continuedIndicates if the current page contains a continued packet from the last page.
ogg_page_packetsIndicates the number of packets contained in a page.
ogg_page_bosIndicates if the current page is the beginning of the stream.
ogg_page_eosIndicates if the current page is the end of the stream.
ogg_page_granuleposReturns the precise playback location of this page.
ogg_page_serialnoReturns the unique serial number of the logical bitstream associated with this page.
ogg_page_pagenoReturns the sequential page number for this page.
ogg_packet_clearClears the ogg_packet structure.
ogg_page_checksum_setChecksums an ogg_page.
- -

-

- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/index.html b/ExternalLibs/libogg-1.2.0/doc/libogg/index.html deleted file mode 100644 index d51e068..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/index.html +++ /dev/null @@ -1,39 +0,0 @@ - - - -libogg - Documentation - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

Libogg Documentation

- -

-Libogg contains necessary functionality to create, decode, and work with Ogg bitstreams. -

This document explains how to use the libogg API in detail. -

-libogg api overview
-libogg api reference
- -

-

- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet.html deleted file mode 100644 index ddd57df..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet.html +++ /dev/null @@ -1,75 +0,0 @@ - - - -libogg - datatype - ogg_packet - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

ogg_packet

- -

declared in "ogg/ogg.h"

- -

-The ogg_packet struct encapsulates the data for a single raw packet of data -and is used to transfer data between the ogg framing layer and the handling codec. -

- - - - - -
-

-typedef struct {
-  unsigned char *packet;
-  long  bytes;
-  long  b_o_s;
-  long  e_o_s;
-
-  ogg_int64_t  granulepos;
-  ogg_int64_t  packetno; 
-
-} ogg_packet;
-
-
- -

Relevant Struct Members

-
-
packet
-
Pointer to the packet's data. This is treated as an opaque type by the ogg layer.
-
bytes
-
Indicates the size of the packet data in bytes. Packets can be of arbitrary size.
-
b_o_s
-
Flag indicating whether this packet begins a logical bitstream. 1 indicates this is the first packet, 0 indicates any other position in the stream.
-
e_o_s
-
Flag indicating whether this packet ends a bitstream. 1 indicates the last packet, 0 indicates any other position in the stream.
-
granulepos
-
A number indicating the position of this packet in the decoded data. This is the last sample, frame or other unit of information ('granule') that can be completely decoded from this packet.
-
packetno
-
Sequential number of this packet in the ogg bitstream.
-
- - -

-
- - - - - - - - -

copyright © 2000-2010 Xiph.Org

Ogg Container Format

libogg documentation

libogg release 1.2.0 - 20100325

- - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet_clear.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet_clear.html deleted file mode 100644 index fa3ef17..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_packet_clear.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - ogg_packet_clear - - - - - - - - - -

libogg documentation

libogg release 1.2.0 - 20100325

- -

ogg_packet_clear

- -

declared in "ogg/ogg.h";

- -

This function clears the memory used by the ogg_packet struct, and frees the internal allocated memory, but does not free -the structure itself. -

- - - - -
-

-int ogg_packet_clear(ogg_packet *op);
-
-
- -

Parameters

-
-
os
-
Pointer to the ogg_packet struct to be cleared.
-
- - -

Return Values

-
-
  • -None.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page.html deleted file mode 100644 index e7867c6..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page.html +++ /dev/null @@ -1,74 +0,0 @@ - - - -libogg - datatype - ogg_page - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page

    - -

    declared in "ogg/ogg.h"

    - -

    -The ogg_page struct encapsulates the data for an Ogg page. -

    -Ogg pages are the fundamental unit of framing and interleave in an ogg bitstream. -They are made up of packet segments of 255 bytes each. There can be as many as -255 packet segments per page, for a maximum page size of a little under 64 kB. -This is not a practical limitation as the segments can be joined across -page boundaries allowing packets of arbitrary size. In practice pages are -usually around 4 kB. -

    -

    For a complete description of ogg pages and headers, please refer to the framing document. - - - - - -
    -
    
-typedef struct {
-  unsigned char *header;
-  long           header_len;
-  unsigned char *body;
-  long           body_len;
-} ogg_page;
-
    -
    - -

    Relevant Struct Members

    -
    -
    header
    -
    Pointer to the page header for this page. The exact contents of this header are defined in the framing spec document.
    -
    header_len
    -
    Length of the page header in bytes. -
    body
    -
    Pointer to the data for this page.
    -
    body_len
    -
    Length of the body data in bytes.
    -
    - - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_bos.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_bos.html deleted file mode 100644 index 1fd0280..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_bos.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - ogg_page_bos - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_bos

    - -

    declared in "ogg/ogg.h";

    - -

    Indicates whether this page is at the beginning of the logical bitstream. -

    -

    - - - - -
    -
    
-int ogg_page_bos(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -greater than 0 if this page is the beginning of a bitstream.
    • -
  • -0 if this page is from any other location in the stream.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_checksum_set.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_checksum_set.html deleted file mode 100644 index daa188e..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_checksum_set.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - ogg_page_checksum_set - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_checksum_set

    - -

    declared in "ogg/ogg.h";

    - -

    Checksums an ogg_page. -

    -

    - - - - -
    -
    
-int ogg_page_checksum_set(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to an ogg_page struct.
    -
    - - -

    Return Values

    -
    -None. -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_continued.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_continued.html deleted file mode 100644 index ea860b1..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_continued.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -libogg - function - ogg_page_version - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_continued

    - -

    declared in "ogg/ogg.h";

    - -

    Indicates whether this page contains packet data which has been continued from the previous page. -

    - - - - -
    -
    
-int ogg_page_continued(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -1 if this page contains packet data continued from the last page.
    • -
  • -0 if this page does not contain continued data.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_eos.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_eos.html deleted file mode 100644 index e3c4c6c..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_eos.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - ogg_page_eos - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_eos

    - -

    declared in "ogg/ogg.h";

    - -

    Indicates whether this page is at the end of the logical bitstream. -

    -

    - - - - -
    -
    
-int ogg_page_eos(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -greater than zero if this page contains the end of a bitstream.
    • -
  • -0 if this page is from any other location in the stream.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_granulepos.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_granulepos.html deleted file mode 100644 index 936ff56..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_granulepos.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - ogg_page_granulepos - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_granulepos

    - -

    declared in "ogg/ogg.h";

    - -

    Returns the exact granular position of the packet data contained at the end of this page. -

    This is useful for tracking location when seeking or decoding. -

    For example, in audio codecs this position is the pcm sample number and in video this is the frame number. -

    -

    - - - - -
    -
    
-ogg_in64_t ogg_page_granulepos(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -n is the specific last granular position of the decoded data contained in the page.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_packets.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_packets.html deleted file mode 100644 index 05203e1..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_packets.html +++ /dev/null @@ -1,75 +0,0 @@ - - - -libogg - function - ogg_page_packets - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_packets

    - -

    declared in "ogg/ogg.h";

    - -

    Returns the number of packets that are completed on this page. If the -leading packet is begun on a previous page, but ends on this page, it's -counted. -

    -

    - - - - -
    -
    
-int ogg_page_packets(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -If a page consists of a packet begun on a previous page, and a new packet -begun (but not completed) on this page, the return will be:
    -
    -ogg_page_packets(page) will return 1,
    -ogg_page_continued(paged) will return non-zero.
    -

    -If a page happens to be a single packet that was begun on a previous page, and -spans to the next page (in the case of a three or more page packet), the -return will be:
    -
    -ogg_page_packets(page) will return 0,
    -ogg_page_continued(page) will return non-zero.
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_pageno.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_pageno.html deleted file mode 100644 index f8983d7..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_pageno.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - ogg_page_pageno - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_pageno

    - -

    declared in "ogg/ogg.h";

    - -

    Returns the sequential page number. -

    This is useful for ordering pages or determining when pages have been lost. -

    - - - - -
    -
    
-long ogg_page_pageno(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -n is the page number for this page.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_serialno.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_serialno.html deleted file mode 100644 index b2a63ca2..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_serialno.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - ogg_page_serialno - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_serialno

    - -

    declared in "ogg/ogg.h";

    - -

    Returns the unique serial number for the logical bitstream of this page. Each page contains the serial number for the logical bitstream that it belongs to. -

    -

    - - - - -
    -
    
-int ogg_page_serialno(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -n is the serial number for this page.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_version.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_version.html deleted file mode 100644 index 429e89a..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_page_version.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - ogg_page_version - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_page_version

    - -

    declared in "ogg/ogg.h";

    - -

    This function returns the version of ogg_page used in this page. -

    In current versions of libogg, all ogg_page structs have the same version, so 0 should always be returned. -

    - - - - -
    -
    
-int ogg_page_version(ogg_page *og);
-
-
    -
    - -

    Parameters

    -
    -
    og
    -
    Pointer to the current ogg_page struct.
    -
    - - -

    Return Values

    -
    -
  • -n is the version number. In the current version of Ogg, the version number is always 0. Nonzero return values indicate an error in page encoding.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_clear.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_clear.html deleted file mode 100644 index a3cf6b6..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_clear.html +++ /dev/null @@ -1,61 +0,0 @@ - - - -libogg - function - ogg_stream_clear - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_clear

    - -

    declared in "ogg/ogg.h";

    - -

    This function clears and frees the internal memory used by the ogg_stream_state struct, but does not free the structure itself. It is safe to call ogg_stream_clear on the same structure more than once. -

    - - - - -
    -
    
-int ogg_stream_clear(ogg_stream_state *os);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the ogg_stream_state struct to be cleared.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_destroy.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_destroy.html deleted file mode 100644 index 1b4349b..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_destroy.html +++ /dev/null @@ -1,71 +0,0 @@ - - - -libogg - function - ogg_stream_destroy - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_destroy

    - -

    declared in "ogg/ogg.h";

    - -

    This function frees the internal memory used by -the ogg_stream_state struct as -well as the structure itself. - -

    This should be called when you are done working with an ogg stream. -It can also be called to make sure that the struct does not exist.

    - -

    It calls free() on its argument, so if the ogg_stream_state -is not malloc()'d or will otherwise be freed by your own code, use -ogg_stream_clear instead.

    - -

    - - - - -
    -
    
-int ogg_stream_destroy(ogg_stream_state *os);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the ogg_stream_state struct to be destroyed.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_eos.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_eos.html deleted file mode 100644 index e8cbe70..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_eos.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - ogg_stream_eos - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_eos

    - -

    declared in "ogg/ogg.h";

    - -

    This function indicates whether we have reached the end of the stream or not. -

    - - - - -
    -
    
-int ogg_stream_eos(ogg_stream_state *os);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the current ogg_stream_state struct.
    -
    - - -

    Return Values

    -
    -
  • 1 if we are at the end of the stream or an internal error occurred.
    • -
  • -0 if we have not yet reached the end of the stream.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_flush.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_flush.html deleted file mode 100644 index a339d14..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_flush.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -libogg - function - ogg_stream_flush - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_flush

    - -

    declared in "ogg/ogg.h";

    - -

    This function checks for remaining packets inside the stream and forces remaining packets into a page, regardless of the size of the page. -

    This should only be used when you want to flush an undersized page from the middle of the stream. Otherwise, ogg_stream_pageout should always be used. -

    This function can be used to verify that all packets have been flushed. If the return value is 0, all packets have been placed into a page. - -

    - - - - -
    -
    
-int ogg_stream_flush(ogg_stream_state *os, ogg_page *og);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared ogg_stream_state struct, which represents the current logical bitstream.
    -
    og
    -
    Pointer to a page of data. The remaining packets in the stream will be placed into this page, if any remain. -
    - - -

    Return Values

    -
    -
  • 0 means that all packet data has already been flushed into pages, and there are no packets to put into the page. 0 is also returned in the case of an ogg_stream_state that has been cleared explicitly or implicitly due to an internal error.
    • -
  • -Nonzero means that remaining packets have successfully been flushed into the page.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_init.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_init.html deleted file mode 100644 index 7342773..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_init.html +++ /dev/null @@ -1,66 +0,0 @@ - - - -libogg - function - ogg_stream_init - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_init

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to initialize an ogg_stream_state struct and allocates appropriate memory in preparation for encoding or decoding. -

    It also assigns the stream a given serial number. -

    - - - - -
    -
    
-int ogg_stream_init(ogg_stream_state *os,int serialno);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the ogg_stream_state struct that we will be initializing.
    -
    serialno
    -
    Serial number that we will attach to this stream.
    -
    - - -

    Return Values

    -
    -
  • -0 if successful
    • -
  • --1 if unsuccessful.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetin.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetin.html deleted file mode 100644 index b683c95..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetin.html +++ /dev/null @@ -1,72 +0,0 @@ - - - -libogg - function - ogg_stream_packetin - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_packetin

    - -

    declared in "ogg/ogg.h";

    - -

    This function submits a packet to the bitstream for page -encapsulation. After this is called, more packets can be submitted, -or pages can be written out.

    - -

    In a typical encoding situation, this should be used after filling a -packet with data. -The data in the packet is copied into the internal storage managed by -the ogg_stream_state, so the caller -is free to alter the contents of op after this call has returned. - -

    - - - - -
    -
    
-int ogg_stream_packetin(ogg_stream_state *os,ogg_packet *op);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared ogg_stream_state struct.
    -
    op
    -
    Pointer to the packet we are putting into the bitstream. -
    - - -

    Return Values

    -
    -
  • -0 returned on success. -1 returned in the event of internal error.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetout.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetout.html deleted file mode 100644 index fc7ffad..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetout.html +++ /dev/null @@ -1,85 +0,0 @@ - - - -libogg - function - ogg_stream_packetout - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_packetout

    - -

    declared in "ogg/ogg.h";

    - -

    This function assembles a data packet for output to the codec -decoding engine. The data has already been submitted to the -ogg_stream_state and broken -into segments. Each successive call returns the next complete packet -built from those segments.

    - -

    In a typical decoding situation, this should be used after calling -ogg_stream_pagein() to submit a -page of data to the bitstream. If the function returns 0, more data is -needed and another page should be submitted. A non-zero return value -indicates successful return of a packet.

    - -

    The op is filled in with pointers to memory managed by -the stream state and is only valid until the next call. The client -must copy the packet data if a longer lifetime is required.

    - -

    - - - - -
    -
    
-int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared ogg_stream_state struct. Before this function is called, an ogg_page should be submitted to the stream using ogg_stream_pagein().
    -
    op
    -
    Pointer to the packet to be filled in with pointers to the new data. -This will typically be submitted to a codec for decode after this -function is called. The pointers are only valid until the next call -on this stream state.
    -
    - - -

    Return Values

    -
    -
      -
    • -1 if we are out of sync and there is a gap in the data. This is usually a recoverable error and subsequent calls to ogg_stream_packetout are likely to succeed. op has not been updated.
      • -
    • 0 if there is insufficient data available to complete a packet, or on unrecoverable internal error occurred. op has not been updated. -
    • 1 if a packet was assembled normally. op contains the next packet from the stream.
      • -
    -
    - -

    - -
    - - - - - - - - - -

    copyright © 2000-2010 xiph.org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetpeek.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetpeek.html deleted file mode 100644 index d2d8562..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_packetpeek.html +++ /dev/null @@ -1,85 +0,0 @@ - - - -libogg - function - ogg_stream_packetpeek - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_packetpeek

    - -

    declared in "ogg/ogg.h";

    - -

    This function attempts to assemble a raw data packet and returns -it without advancing decoding.

    - -

    In a typical situation, this would be called -speculatively after ogg_stream_pagein() to check -the packet contents before handing it off to a codec for -decompression. To advance page decoding and remove -the packet from the sync structure, call -ogg_stream_packetout().

    - -

    - - - - - -
    -
    
-int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared -ogg_stream_state struct. Before this -function is called, an ogg_page should be -submitted to the stream using -ogg_stream_pagein().
    -
    op
    -
    Pointer to the next packet available in the bitstream, if -any. A NULL value may be passed in the case of a simple "is there a -packet?" check.
    -
    - - -

    Return Values

    -
    -
      -
    • -1 if there's no packet available due to lost sync or a hole in the data.
      • -
    • 0 if there is insufficient data available to complete a packet, or on unrecoverable internal error occurred.
      • -
    • 1 if a packet is available.
      • -
    -
    - - -

    - -
    - - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pagein.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pagein.html deleted file mode 100644 index 316ba30..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pagein.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -libogg - function - ogg_stream_pagein - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_pagein

    - -

    declared in "ogg/ogg.h";

    - -

    This function adds a complete page to the bitstream. -

    In a typical decoding situation, this function would be called after using ogg_sync_pageout to create a valid ogg_page struct. -

    Internally, this function breaks the page into packet segments in preparation for outputting a valid packet to the codec decoding layer. - -

    - - - - -
    -
    
-int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared ogg_stream struct, which represents the current logical bitstream.
    -
    og
    -
    Pointer to a page of data. The data inside this page is being submitted to the streaming layer in order to be allocated into packets. -
    - - -

    Return Values

    -
    -
  • -1 indicates failure. This means that the serial number of the page did not match the serial number of the bitstream, the page version was incorrect, or an internal error accurred.
    • -
  • -0 means that the page was successfully submitted to the bitstream.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pageout.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pageout.html deleted file mode 100644 index c07a975..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_pageout.html +++ /dev/null @@ -1,84 +0,0 @@ - - - -libogg - function - ogg_stream_pageout - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_pageout

    - -

    declared in "ogg/ogg.h";

    - -

    This function forms packets into pages.

    - -

    In a typical encoding situation, this would be called after using ogg_stream_packetin() to submit -data packets to the bitstream. Internally, this function assembles -the accumulated packet bodies into an Ogg page suitable for writing -to a stream. The function is typically called in a loop until there -are no more pages ready for output.

    - -

    This function will only return a page when a "reasonable" amount of -packet data is available. Normally this is appropriate since it -limits the overhead of the Ogg page headers in the bitstream, and so -calling ogg_stream_pageout() after ogg_stream_packetin() should be the -common case. Call ogg_stream_flush() -if immediate page generation is desired. This may be occasionally -necessary, for example, to limit the temporal latency of a variable -bitrate stream.

    - -

    - - - - -
    -
    
-int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to a previously declared ogg_stream struct, which represents the current logical bitstream.
    -
    og
    -
    Pointer to an ogg_page structure to fill -in. Data pointed to is owned by libogg. The structure is valid until the -next call to ogg_stream_pageout(), ogg_stream_packetin(), or -ogg_stream_flush().
    -
    - - -

    Return Values

    -
    -
  • Zero means that insufficient data has accumulated to fill a page, or an internal error occurred. In -this case og is not modified.
    • -
  • Non-zero means that a page has been completed and returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 xiph.org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset.html deleted file mode 100644 index 88d4e19..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset.html +++ /dev/null @@ -1,61 +0,0 @@ - - - -libogg - function - ogg_stream_reset - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_reset

    - -

    declared in "ogg/ogg.h";

    - -

    This function sets values in the ogg_stream_state struct back to initial values. -

    - - - - -
    -
    
-int ogg_stream_reset(ogg_stream_state *os);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the ogg_stream_state struct to be cleared.
    -
    - - -

    Return Values

    -
    -
  • -0 indicates success. nonzero is returned on internal error.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset_serialno.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset_serialno.html deleted file mode 100644 index 6f2688c..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_reset_serialno.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -libogg - function - ogg_stream_reset_serialno - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_reset

    - -

    declared in "ogg/ogg.h";

    - -

    This function reinitializes the values in the -ogg_stream_state, -just like ogg_stream_reset(). -Additionally, it sets the stream serial number to the given value.

    - -

    - - - - -
    -
    
-int ogg_stream_reset_serialno(ogg_stream_state *os, int serialno);
-
    -
    - -

    Parameters

    -
    -
    os
    -
    Pointer to the ogg_stream_state struct to be cleared.
    -
    serialno
    -
    New stream serial number to use
    -
    - - -

    Return Values

    -
    -
  • -0 indicates success. nonzero is returned on internal error.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_state.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_state.html deleted file mode 100644 index e903f03..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_stream_state.html +++ /dev/null @@ -1,121 +0,0 @@ - - - -libogg - datatype - ogg_stream_state - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_stream_state

    - -

    declared in "ogg/ogg.h"

    - -

    -The ogg_stream_state struct tracks the current encode/decode state of the current logical bitstream. -

    - - - - - -
    -
    
-typedef struct {
-  unsigned char   *body_data;    /* bytes from packet bodies */
-  long    body_storage;          /* storage elements allocated */
-  long    body_fill;             /* elements stored; fill mark */
-  long    body_returned;         /* elements of fill returned */
-
-
-  int     *lacing_vals;    /* The values that will go to the segment table */
-  ogg_int64_t *granule_vals;      /* granulepos values for headers. Not compact
-                             this way, but it is simple coupled to the
-                             lacing fifo */
-  long    lacing_storage;
-  long    lacing_fill;
-  long    lacing_packet;
-  long    lacing_returned;
-
-  unsigned char    header[282];      /* working space for header encode */
-  int              header_fill;
-
-  int     e_o_s;          /* set when we have buffered the last packet in the
-                             logical bitstream */
-  int     b_o_s;          /* set after we've written the initial page
-                             of a logical bitstream */
-  long     serialno;
-  int      pageno;
-  ogg_int64_t  packetno;      /* sequence number for decode; the framing
-                             knows where there's a hole in the data,
-                             but we need coupling so that the codec
-                             (which is in a seperate abstraction
-                             layer) also knows about the gap */
-  ogg_int64_t   granulepos;
-
-} ogg_stream_state;
-
    -
    - -

    Relevant Struct Members

    -
    -
    body_data
    -
    Pointer to data from packet bodies.
    -
    body_storage
    -
    Storage allocated for bodies in bytes (filled or unfilled).
    -
    body_fill
    -
    Amount of storage filled with stored packet bodies.
    -
    body_returned
    -
    Number of elements returned from storage.
    -
    lacing_vals
    -
    String of lacing values for the packet segments within the current page. Each value is a byte, indicating packet segment length.
    -
    granule_vals
    -
    Pointer to the lacing values for the packet segments within the current page.
    -
    lacing_storage
    -
    Total amount of storage (in bytes) allocated for storing lacing values.
    -
    lacing_fill
    -
    Fill marker for the current vs. total allocated storage of lacing values for the page.
    -
    lacing_packet
    -
    Lacing value for current packet segment.
    -
    lacing_returned
    -
    Number of lacing values returned from lacing_storage.
    -
    header
    -
    Temporary storage for page header during encode process, while the header is being created.
    -
    header_fill
    -
    Fill marker for header storage allocation. Used during the header creation process.
    -
    e_o_s
    -
    Marker set when the last packet of the logical bitstream has been buffered.
    -
    b_o_s
    -
    Marker set after we have written the first page in the logical bitstream.
    -
    serialno
    -
    Serial number of this logical bitstream.
    -
    pageno
    -
    Number of the current page within the stream.
    -
    packetno
    -
    Number of the current packet.
    -
    granulepos
    -
    Exact position of decoding/encoding process.
    -
    - - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_buffer.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_buffer.html deleted file mode 100644 index ed8b286..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_buffer.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -libogg - function - ogg_sync_buffer - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_buffer

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to provide a properly-sized buffer for writing. -

    Buffer space which has already been returned is cleared, and the buffer is extended as necessary by the size plus some additional bytes. Within the current implementation, an extra 4096 bytes are allocated, but applications should not rely on this additional buffer space. -

    The buffer exposed by this function is empty internal storage from the ogg_sync_state struct, beginning at the fill mark within the struct. -

    A pointer to this buffer is returned to be used by the calling application. - -

    - - - - -
    -
    
-char *ogg_sync_buffer(ogg_sync_state *oy, long size);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    size
    -
    Size of the desired buffer. The actual size of the buffer returned will be this size plus some extra bytes (currently 4096). -
    - - -

    Return Values

    -
    -
  • -Returns a pointer to the newly allocated buffer or NULL on error
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_clear.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_clear.html deleted file mode 100644 index 02ae40c..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_clear.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - ogg_sync_clear - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_clear

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to free the internal storage of an ogg_sync_state struct and resets the struct to the initial state. To free the entire struct, ogg_sync_destroy should be used instead. In situations where the struct needs to be reset but the internal storage does not need to be freed, ogg_sync_reset should be used. - -

    - - - - -
    -
    
-int ogg_sync_clear(ogg_sync_state *oy);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_destroy.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_destroy.html deleted file mode 100644 index c73cd22..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_destroy.html +++ /dev/null @@ -1,68 +0,0 @@ - - - -libogg - function - ogg_sync_destroy - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_destroy

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to destroy an ogg_sync_state struct and free all memory used.

    - -

    Note this calls free() on its argument so you should only use this -function if you've allocated the ogg_sync_state on the heap. If it is -allocated on the stack, or it will otherwise be freed by your -own code, use ogg_sync_clear instead -to release just the internal memory.

    - -

    - - - - -
    -
    
-int ogg_sync_destroy(ogg_sync_state *oy);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_init.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_init.html deleted file mode 100644 index 15e2b78..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_init.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - ogg_sync_init - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_init

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to initialize an ogg_sync_state struct to a known initial value in preparation for manipulation of an Ogg bitstream. -

    The ogg_sync struct is important when decoding, as it synchronizes retrieval and return of data. - -

    - - - - -
    -
    
-int ogg_sync_init(ogg_sync_state *oy);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct. After this function call, this struct has been initialized.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageout.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageout.html deleted file mode 100644 index 982168d..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageout.html +++ /dev/null @@ -1,77 +0,0 @@ - - - -libogg - function - ogg_sync_pageout - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_pageout

    - -

    declared in "ogg/ogg.h";

    - -

    This function takes the data stored in the buffer of the ogg_sync_state struct and inserts them into an ogg_page. - -

    In an actual decoding loop, this function should be called first to ensure that the buffer is cleared. The example code below illustrates a clean reading loop which will fill and output pages. -

    Caution:This function should be called before reading into the buffer to ensure that data does not remain in the ogg_sync_state struct. Failing to do so may result in a memory leak. See the example code below for details. - -

    - - - - -
    -
    
-int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct. Normally, the internal storage of this struct should be filled with newly read data and verified using ogg_sync_wrote.
    -
    og
    -
    Pointer to page struct filled by this function. -
    - - -

    Return Values

    -
    -
  • -1 returned if stream has not yet captured sync (bytes were skipped).
    • -
  • 0 returned if more data needed or an internal error occurred.
    • -
  • 1 indicated a page was synced and returned.
    • -
    -

    - -

    Example Usage

    -
    -if (ogg_sync_pageout(&oy, &og) != 1) {
-	buffer = ogg_sync_buffer(&oy, 8192);
-	bytes = fread(buffer, 1, 8192, stdin);
-	ogg_sync_wrote(&oy, bytes);
-}
-
    - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageseek.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageseek.html deleted file mode 100644 index f4109ef..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_pageseek.html +++ /dev/null @@ -1,68 +0,0 @@ - - - -libogg - function - ogg_sync_pageseek - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_pageseek

    - -

    declared in "ogg/ogg.h";

    - -

    This function synchronizes the ogg_sync_state struct to the next ogg_page. -

    This is useful when seeking within a bitstream. ogg_sync_pageseek will synchronize to the next page in the bitstream and return information about how many bytes we advanced or skipped in order to do so. - -

    - - - - -
    -
    
-int ogg_sync_pageseek(ogg_sync_state *oy, ogg_page *og);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    og
    -
    Pointer to a page (or an incomplete page) of data. This is the page we are attempting to sync. -
    - - -

    Return Values

    -
    -
  • -n means that we skipped n bytes within the bitstream.
    • -
  • -0 means that the page isn't ready and we need more data, or than an internal error occurred. No bytes have been skipped.
    • -
  • -n means that the page was synced at the current location, with a page length of n bytes. -
    • -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_reset.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_reset.html deleted file mode 100644 index b32fed4..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_reset.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - ogg_sync_reset - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_reset

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to reset the internal counters of the ogg_sync_state struct to initial values. -

    It is a good idea to call this before seeking within a bitstream. - -

    - - - - -
    -
    
-int ogg_sync_reset(ogg_sync_state *oy);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    - - -

    Return Values

    -
    -
  • -0 is always returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_state.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_state.html deleted file mode 100644 index 2384a5e..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_state.html +++ /dev/null @@ -1,77 +0,0 @@ - - - -libogg - datatype - ogg_sync_state - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_state

    - -

    declared in "ogg/ogg.h"

    - -

    -The ogg_sync_state struct tracks the synchronization of the current page. -

    It is used during decoding to track the status of data as it is read in, synchronized, verified, and parsed into pages belonging to the various logical bistreams in the current physical bitstream link. -

    - - - - - -
    -
    
-typedef struct {
-  unsigned char *data;
-  int storage;
-  int fill;
-  int returned;
-
-  int unsynced;
-  int headerbytes;
-  int bodybytes;
-} ogg_sync_state;
-
    -
    - -

    Relevant Struct Members

    -
    -
    data
    -
    Pointer to buffered stream data.
    -
    storage
    -
    Current allocated size of the stream buffer held in *data.
    -
    fill
    -
    The number of valid bytes currently held in *data; functions as the buffer head pointer.
    -
    returned
    -
    The number of bytes at the head of *data that have already been returned as pages; functions as the buffer tail pointer.
    -
    unsynced
    -
    Synchronization state flag; nonzero if sync has not yet been attained or has been lost.
    -
    headerbytes
    -
    If synced, the number of bytes used by the synced page's header.
    -
    bodybytes
    -
    If synced, the number of bytes used by the synced page's body.
    -
    - - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_wrote.html b/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_wrote.html deleted file mode 100644 index 27e572e..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/ogg_sync_wrote.html +++ /dev/null @@ -1,73 +0,0 @@ - - - -libogg - function - ogg_sync_wrote - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    ogg_sync_wrote

    - -

    declared in "ogg/ogg.h";

    - -

    This function is used to tell the ogg_sync_state struct how many bytes we wrote into the buffer. - -

    -The general proceedure is to request a pointer into an internal -ogg_sync_state buffer by calling -ogg_sync_buffer(). The buffer -is then filled up to the requested size with new input, and -ogg_sync_wrote() is called to advance the fill pointer by however -much data was actually available.

    - -
    - - - - -
    -
    
-int ogg_sync_wrote(ogg_sync_state *oy, long bytes);
-
    -
    - -

    Parameters

    -
    -
    oy
    -
    Pointer to a previously declared ogg_sync_state struct.
    -
    bytes
    -
    Number of bytes of new data written.
    -
    - - -

    Return Values

    -
    -
  • -1 if the number of bytes written overflows the internal storage of the ogg_sync_state struct or an internal error occurred. -
  • -0 in all other cases.
    • -
    - - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv.html deleted file mode 100644 index 64723a4..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -libogg - function - oggpack_adv - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_adv

    - -

    declared in "ogg/ogg.h";

    - -

    This function advances the location pointer by the specified number of bits without reading any data. - -

    - - - - -
    -
    
-void  oggpack_adv(oggpack_buffer *b,int bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to the current oggpack_buffer.
    -
    bits
    -
    Number of bits to advance.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv1.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv1.html deleted file mode 100644 index 8e21e48..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_adv1.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_adv1 - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_adv1

    - -

    declared in "ogg/ogg.h";

    - -

    This function advances the location pointer by one bit without reading any data. - -

    - - - - -
    -
    
-void  oggpack_adv1(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to the current oggpack_buffer.
    -
    - - -

    Return Values

    -
    -
  • No values are returned. -
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bits.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bits.html deleted file mode 100644 index 5375fca..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bits.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_bits - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_bits

    - -

    declared in "ogg/ogg.h";

    - -

    This function returns the total number of bits currently in the oggpack_buffer's internal buffer. - -

    - - - - -
    -
    
-long oggpack_bits(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    oggpack_buffer struct to be .
    -
    - - -

    Return Values

    -
    -
  • -n is the total number of bits within the current buffer.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_buffer.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_buffer.html deleted file mode 100644 index 4a8b3dc..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_buffer.html +++ /dev/null @@ -1,66 +0,0 @@ - - - -libogg - datatype - oggpack_buffer - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_buffer

    - -

    declared in "ogg/ogg.h"

    - -

    -The oggpack_buffer struct is used with libogg's bitpacking functions. You should never need to directly access anything in this structure. -

    - - - - - -
    -
    
-typedef struct {
-  long endbyte;
-  int  endbit;
-
-  unsigned char *buffer;
-  unsigned char *ptr;
-  long storage;
-} oggpack_buffer;
-
    -
    - -

    Relevant Struct Members

    -
    -
    buffer
    -
    Pointer to data being manipulated.
    -
    ptr
    -
    Location pointer to mark which data has been read.
    -
    storage
    -
    Size of buffer. -
    - - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bytes.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bytes.html deleted file mode 100644 index b8ac08c..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_bytes.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -libogg - function - oggpack_bytes - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_bytes

    - -

    declared in "ogg/ogg.h";

    - -

    This function returns the total number of bytes behind the current -access point in the oggpack_buffer. -For write-initialized buffers, this is the number of complete bytes -written so far. For read-initialized buffers, it is the number of -complete bytes that have been read so far. -

    The return value is the number of complete bytes in the buffer. -There may be extra (<8) bits. -

    - - - - -
    -
    
-long oggpack_bytes(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    oggpack_buffer struct to be checked.
    -
    - - -

    Return Values

    -
    -
  • -n is the total number of bytes within the current buffer.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 xiph.org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_get_buffer.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_get_buffer.html deleted file mode 100644 index 2e8da55..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_get_buffer.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_get_buffer - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_get_buffer

    - -

    declared in "ogg/ogg.h";

    - -

    This function returns a pointer to the data buffer within the given oggpack_buffer struct. - -

    - - - - -
    -
    
-unsigned char *oggpack_get_buffer(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to the current oggpack_buffer.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look.html deleted file mode 100644 index 9c85f71..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look.html +++ /dev/null @@ -1,66 +0,0 @@ - - - -libogg - function - oggpack_look - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_look

    - -

    declared in "ogg/ogg.h";

    - -

    This function looks at a specified number of bits inside the buffer without advancing the location pointer. -

    The specified number of bits are read, starting from the location pointer. -

    This function can be used to read 32 or fewer bits. - -

    - - - - -
    -
    
-long  oggpack_look(oggpack_buffer *b,int bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to oggpack_buffer to be read.
    -
    bits
    -
    Number of bits to look at. For this function, must be 32 or fewer.
    -
    - - -

    Return Values

    -
    -
  • -n represents the requested bits.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look1.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look1.html deleted file mode 100644 index b48b231..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_look1.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - oggpack_look1 - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_look1

    - -

    declared in "ogg/ogg.h";

    - -

    This function looks at the next bit without advancing the location pointer. -

    The next bit is read starting from the location pointer. - -

    - - - - -
    -
    
-long  oggpack_look1(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to an oggpack_buffer struct containing our buffer.
    -
    - - -

    Return Values

    -
    -
  • -n represents the value of the next bit after the location pointer.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read.html deleted file mode 100644 index c079732..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - oggpack_read - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_read

    - -

    declared in "ogg/ogg.h";

    - -

    This function reads the requested number of bits from the buffer and advances the location pointer. -

    Before reading, the buffer should be initialized using oggpack_readinit. - -

    - - - - -
    -
    
-long oggpack_read(oggpack_buffer *b,int bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to an oggpack_buffer struct containing buffered data to be read.
    -
    bits
    -
    Number of bits to read.
    -
    - - -

    Return Values

    -
    -
  • -n represents the requested bits.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read1.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read1.html deleted file mode 100644 index 92e61a4..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_read1.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -libogg - function - oggpack_read1 - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_read1

    - -

    declared in "ogg/ogg.h";

    - -

    This function reads one bit from the oggpack_buffer data buffer and advances the location pointer. -

    Before reading, the buffer should be initialized using oggpack_readinit. - -

    - - - - -
    -
    
-long  oggpack_read1(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to an oggpack_buffer struct containing buffered data to be read.
    -
    - - -

    Return Values

    -
    -
  • -n is the bit read by this function.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_readinit.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_readinit.html deleted file mode 100644 index 0b57f26..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_readinit.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -libogg - function - oggpack_readinit - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_readinit

    - -

    declared in "ogg/ogg.h";

    - -

    This function takes an ordinary buffer and prepares an oggpack_buffer for reading using the Ogg bitpacking functions. - -

    - - - - -
    -
    
-void oggpack_readinit(oggpack_buffer *b,unsigned char *buf,int bytes);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Pointer to oggpack_buffer to be initialized with some extra markers to ease bit navigation and manipulation.
    -
    buf
    -
    Original data buffer, to be inserted into the oggpack_buffer so that it can be read using bitpacking functions. -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_reset.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_reset.html deleted file mode 100644 index dbe69d6..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_reset.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_reset - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_reset

    - -

    declared in "ogg/ogg.h";

    - -

    This function resets the contents of an oggpack_buffer to their original state but does not free the memory used. - -

    - - - - -
    -
    
-void  oggpack_reset(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    oggpack_buffer to be reset.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_write.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_write.html deleted file mode 100644 index cf6817e..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_write.html +++ /dev/null @@ -1,68 +0,0 @@ - - - -libogg - function - oggpack_write - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_write

    - -

    declared in "ogg/ogg.h";

    - -

    This function writes bits into an oggpack_buffer. -

    The oggpack_buffer must already be initialized for writing using oggpack_writeinit. -

    Only 32 bits can be written at a time. - -

    - - - - -
    -
    
-void  oggpack_write(oggpack_buffer *b,unsigned long value,int bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Buffer to be used for writing.
    -
    value
    -
    The data to be written into the buffer. This must be 32 bits or fewer.
    -
    bits
    -
    The number of bits being written into the buffer.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writealign.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writealign.html deleted file mode 100644 index bea994c..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writealign.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - oggpack_writealign - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_writealign

    - -

    declared in "ogg/ogg.h";

    - -

    This function pads the oggpack_buffer with zeros out to the -next byte boundary.

    -

    The oggpack_buffer must already be initialized for writing using oggpack_writeinit. -

    Only 32 bits can be written at a time.

    - -

    - - - - -
    -
    
-void  oggpack_writetrunc(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Buffer to be used for writing.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeclear.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeclear.html deleted file mode 100644 index edd2e21..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeclear.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_reset - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_writeclear

    - -

    declared in "ogg/ogg.h";

    - -

    This function clears the buffer after writing and frees the memory used by the oggpack_buffer. - -

    - - - - -
    -
    
-void oggpack_writeclear(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Our oggpack_buffer. This is an ordinary data buffer with some extra markers to ease bit navigation and manipulation.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writecopy.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writecopy.html deleted file mode 100644 index 28c2820..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writecopy.html +++ /dev/null @@ -1,69 +0,0 @@ - - - -libogg - function - oggpack_writecopy - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_writecopy

    - -

    declared in "ogg/ogg.h";

    - -

    This function copies a sequence of bits from a source buffer into an -oggpack_buffer.

    -

    The oggpack_buffer must already be initialized for writing using oggpack_writeinit.

    -

    Only 32 bits can be written at a time.

    - -

    - - - - -
    -
    
-void  oggpack_writecopy(oggpack_buffer *b, void *source, long bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Buffer to be used for writing.
    -
    source
    -
    A pointer to the data to be written into the buffer.
    -
    bits
    -
    The number of bits to be copied into the buffer.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeinit.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeinit.html deleted file mode 100644 index 99a9ed3..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writeinit.html +++ /dev/null @@ -1,62 +0,0 @@ - - - -libogg - function - oggpack_writeinit - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_writeinit

    - -

    declared in "ogg/ogg.h";

    - -

    This function initializes an oggpack_buffer for writing using the Ogg bitpacking functions. - -

    - - - - -
    -
    
-void  oggpack_writeinit(oggpack_buffer *b);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Buffer to be used for writing. This is an ordinary data buffer with some extra markers to ease bit navigation and manipulation.
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writetrunc.html b/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writetrunc.html deleted file mode 100644 index 21524ed..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/oggpack_writetrunc.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -libogg - function - oggpack_writetrunc - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    oggpack_writetrunc

    - -

    declared in "ogg/ogg.h";

    - -

    This function truncates an already written-to oggpack_buffer.

    -

    The oggpack_buffer must already be initialized for writing using oggpack_writeinit.

    - -

    - - - - -
    -
    
-void  oggpack_writetrunc(oggpack_buffer *b, long bits);
-
    -
    - -

    Parameters

    -
    -
    b
    -
    Buffer to be truncated.
    -
    bits
    -
    Number of bits to keep in the buffer (size after truncation)
    -
    - - -

    Return Values

    -
    -
  • -No values are returned.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/overview.html b/ExternalLibs/libogg-1.2.0/doc/libogg/overview.html deleted file mode 100644 index 432300e..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/overview.html +++ /dev/null @@ -1,44 +0,0 @@ - - - -libogg - API Overview - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    Libogg API Overview

    - -

    -The libogg API consists of the following functional categories: -

    -

    - -

    -
    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/reference.html b/ExternalLibs/libogg-1.2.0/doc/libogg/reference.html deleted file mode 100644 index 89364a7..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/reference.html +++ /dev/null @@ -1,96 +0,0 @@ - - - -Libogg API Reference - - - - - - - - - -

    libogg documentation

    libogg release 1.2.0 - 20100325

    - -

    Libogg API Reference

    - -

    -Data Structures
    -oggpack_buffer
    -ogg_page
    -ogg_stream_state
    -ogg_packet
    -ogg_sync_state
    -
    -Bitpacking
    -oggpack_writeinit()
    -oggpack_writecheck()
    -oggpack_reset()
    -oggpack_writetrunc()
    -oggpack_writealign()
    -oggpack_writecopy()
    -oggpack_writeclear()
    -oggpack_readinit()
    -oggpack_write()
    -oggpack_look()
    -oggpack_look1()
    -oggpack_adv()
    -oggpack_adv1()
    -oggpack_read()
    -oggpack_read1()
    -oggpack_bytes()
    -oggpack_bits()
    -oggpack_get_buffer()
    -
    -Decoding-Related
    -ogg_sync_init()
    -ogg_sync_check()
    -ogg_sync_clear()
    -ogg_sync_destroy()
    -ogg_sync_reset()
    -ogg_sync_buffer()
    -ogg_sync_wrote()
    -ogg_sync_pageseek()
    -ogg_sync_pageout()
    -ogg_stream_pagein()
    -ogg_stream_packetout()
    -ogg_stream_packetpeek()
    -
    -Encoding-Related
    -ogg_stream_packetin()
    -ogg_stream_pageout()
    -ogg_stream_flush()
    -
    -General
    -ogg_stream_init()
    -ogg_stream_check()
    -ogg_stream_clear()
    -ogg_stream_reset()
    -ogg_stream_reset_serialno()
    -ogg_stream_destroy()
    -ogg_page_version()
    -ogg_page_continued()
    -ogg_page_packets()
    -ogg_page_bos()
    -ogg_page_eos()
    -ogg_page_granulepos()
    -ogg_page_serialno()
    -ogg_page_pageno()
    -ogg_packet_clear()
    -ogg_page_checksum_set()
    -

    -

    - - - - - - - - -

    copyright © 2000-2010 Xiph.Org Foundation

    Ogg Container Format

    libogg documentation

    libogg release 1.2.0 - 20100325

    - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/libogg/style.css b/ExternalLibs/libogg-1.2.0/doc/libogg/style.css deleted file mode 100644 index 81cf417..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/libogg/style.css +++ /dev/null @@ -1,7 +0,0 @@ -BODY { font-family: Helvetica, sans-serif } -TD { font-family: Helvetica, sans-serif } -P { font-family: Helvetica, sans-serif } -H1 { font-family: Helvetica, sans-serif } -H2 { font-family: Helvetica, sans-serif } -H4 { font-family: Helvetica, sans-serif } -P.tiny { font-size: 8pt } diff --git a/ExternalLibs/libogg-1.2.0/doc/ogg-multiplex.html b/ExternalLibs/libogg-1.2.0/doc/ogg-multiplex.html deleted file mode 100644 index 41c1481..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/ogg-multiplex.html +++ /dev/null @@ -1,445 +0,0 @@ - - - - - -Ogg Documentation - - - - - - - - - -

    Page Multiplexing and Ordering in a Physical Ogg Stream

    - -

    The low-level mechanisms of an Ogg stream (as described in the Ogg -Bitstream Overview) provide means for mixing multiple logical streams -and media types into a single linear-chronological stream. This -document specifies the high-level arrangement and use of page -structure to multiplex multiple streams of mixed media type within a -physical Ogg stream.

    - -

    Design Elements

    - -

    The design and arrangement of the Ogg container format is governed by -several high-level design decisions that form the reasoning behind -specific low-level design decisions.

    - -

    Linear media

    - -

    The Ogg bitstream is intended to encapsulate chronological, -time-linear mixed media into a single delivery stream or file. The -design is such that an application can always encode and/or decode a -full-featured bitstream in one pass with no seeking and minimal -buffering. Seeking to provide optimized encoding (such as two-pass -encoding) or interactive decoding (such as scrubbing or instant -replay) is not disallowed or discouraged, however no bitstream feature -must require nonlinear operation on the bitstream.

    - -

    Multiplexing

    - -

    Ogg bitstreams multiplex multiple logical streams into a single -physical stream at the page level. Each page contains an abstract -time stamp (the Granule Position) that represents an absolute time -landmark within the stream. After the pages representing stream -headers (all logical stream headers occur at the beginning of a -physical bitstream section before any logical stream data), logical -stream data pages are arranged in a physical bitstream in strict -non-decreasing order by chronological absolute time as -specified by the granule position.

    - -

    The only exception to arranging pages in strictly ascending time order -by granule position is those pages that do not set the granule -position value. This is a special case when exceptionally large -packets span multiple pages; the specifics of handling this special -case are described later under 'Continuous and Discontinuous -Streams'.

    - -

    Seeking

    - -

    Ogg is designed to use a bisection search to implement exact -positional seeking rather than building an index; an index requires -two-pass encoding and as such is not acceptable given the requirement -for full-featured linear encoding.

    - -

    Even making an index optional then requires an -application to support multiple methods (bisection search for a -one-pass stream, indexing for a two-pass stream), which adds no -additional functionality as bisection search delivers the same -functionality for both stream types.

    - -

    Seek operations are by absolute time; a direct bisection search must -find the exact time position requested. Information in the Ogg -bitstream is arranged such that all information to be presented for -playback from the desired seek point will occur at or after the -desired seek point. Seek operations are neither 'fuzzy' nor -heuristic.

    - -

    Although key frame handling in video appears to be an exception to -"all needed playback information lies ahead of a given seek", -key frames can still be handled directly within this indexless -framework. Seeking to a key frame in video (as well as seeking in other -media types with analogous restraints) is handled as two seeks; first -a seek to the desired time which extracts state information that -decodes to the time of the last key frame, followed by a second seek -directly to the key frame. The location of the previous key frame is -embedded as state information in the granulepos; this mechanism is -described in more detail later.

    - -

    Continuous and Discontinuous Streams

    - -

    Logical streams within a physical Ogg stream belong to one of two -categories, "Continuous" streams and "Discontinuous" streams. -Although these are discussed in more detail later, the distinction is -important to a high-level understanding of how to buffer an Ogg -stream.

    - -

    A stream that provides a gapless, time-continuous media type with a -fine-grained timebase is considered to be 'Continuous'. A continuous -stream should never be starved of data. Clear examples of continuous -data types include broadcast audio and video.

    - -

    A stream that delivers data in a potentially irregular pattern or with -widely spaced timing gaps is considered to be 'Discontinuous'. A -discontinuous stream may be best thought of as data representing -scattered events; although they happen in order, they are typically -unconnected data often located far apart. One possible example of a -discontinuous stream types would be captioning. Although it's -possible to design captions as a continuous stream type, it's most -natural to think of captions as widely spaced pieces of text with -little happening between.

    - -

    The fundamental design distinction between continuous and -discontinuous streams concerns buffering.

    - -

    Buffering

    - -

    Because a continuous stream is, by definition, gapless, Ogg buffering -is based on the simple premise of never allowing any active continuous -stream to starve for data during decode; buffering proceeds ahead -until all continuous streams in a physical stream have data ready to -decode on demand.

    - -

    Discontinuous stream data may occur on a fairly regular basis, but the -timing of, for example, a specific caption is impossible to predict -with certainty in most captioning systems. Thus the buffering system -should take discontinuous data 'as it comes' rather than working ahead -(for a potentially unbounded period) to look for future discontinuous -data. As such, discontinuous streams are ignored when managing -buffering; their pages simply 'fall out' of the stream when continuous -streams are handled properly.

    - -

    Buffering requirements need not be explicitly declared or managed for -the encoded stream; the decoder simply reads as much data as is -necessary to keep all continuous stream types gapless (also ensuring -discontinuous data arrives in time) and no more, resulting in optimum -implicit buffer usage for a given stream. Because all pages of all -data types are stamped with absolute timing information within the -stream, inter-stream synchronization timing is always explicitly -maintained without the need for explicitly declared buffer-ahead -hinting.

    - -

    Further details, mechanisms and reasons for the differing arrangement -and behavior of continuous and discontinuous streams is discussed -later.

    - -

    Whole-stream navigation

    - -

    Ogg is designed so that the simplest navigation operations treat the -physical Ogg stream as a whole summary of its streams, rather than -navigating each interleaved stream as a separate entity.

    - -

    First Example: seeking to a desired time position in a multiplexed (or -unmultiplexed) Ogg stream can be accomplished through a bisection -search on time position of all pages in the stream (as encoded in the -granule position). More powerful searches (such as a key frame-aware -seek within video) are also possible with additional search -complexity, but similar computational complexity.

    - -

    Second Example: A bitstream section may consist of three multiplexed -streams of differing lengths. The result of multiplexing these -streams should be thought of as a single mixed stream with a length -equal to the longest of the three component streams. Although it is -also possible to think of the multiplexed results as three concurrent -streams of different lengths and it is possible to recover the three -original streams, it will also become obvious that once multiplexed, -it isn't possible to find the internal lengths of the component -streams without a linear search of the whole bitstream section. -However, it is possible to find the length of the whole bitstream -section easily (in near-constant time per section) just as it is for a -single-media unmultiplexed stream.

    - -

    Granule Position

    - -

    Description

    - -

    The Granule Position is a signed 64 bit field appearing in the header -of every Ogg page. Although the granule position represents absolute -time within a logical stream, its value does not necessarily directly -encode a simple timestamp. It may represent frames elapsed (as in -Vorbis), a simple timestamp, or a more complex bit-division encoding -(such as in Theora). The exact encoding of the granule position is up -to a specific codec.

    - -

    The granule position is governed by the following rules:

    - -
      - -
    • Granule Position must always increase forward or remain equal from -page to page, be unset, or be zero for a header page. The absolute -time to which any correct sequence of granule position maps must -similarly always increase forward or remain equal. (A codec may -make use of data, such as a control sequence, that only affects codec -working state without producing data and thus advancing granule -position and time. Although the packet sequence number increases in -this case, the granule position, and thus the time position, do -not.)
      • - -
    • Granule position may only be unset if there no packet defining a -time boundary on the page (that is, if no packet in a continuous -stream ends on the page, or no packet in a discontinuous stream begins -on the page. This will be discussed in more detail under Continuous -and Discontinuous streams).
      • - -
    • A codec must be able to translate a given granule position value -to a unique, deterministic absolute time value through direct -calculation. A codec is not required to be able to translate an -absolute time value into a unique granule position value.
      • - -
    • Codecs shall choose a granule position definition that allows that -codec means to seek as directly as possible to an immediately -decodable point, such as the bit-divided granule position encoding of -Theora allows the codec to seek efficiently to key frame without using -an index. That is, additional information other than absolute time -may be encoded into a granule position value so long as the granule -position obeys the above points.
      • - -
    - -

    Example: timestamp

    - -

    In general, a codec/stream type should choose the simplest granule -position encoding that addresses its requirements. The examples here -are by no means exhaustive of the possibilities within Ogg.

    - -

    A simple granule position could encode a timestamp directly. For -example, a granule position that encoded milliseconds from beginning -of stream would allow a logical stream length of over 100,000,000,000 -days before beginning a new logical stream (to avoid the granule -position wrapping).

    - -

    Example: framestamp

    - -

    A simple millisecond timestamp granule encoding might suit many stream -types, but a millisecond resolution is inappropriate to, eg, most -audio encodings where exact single-sample resolution is generally a -requirement. A millisecond is both too large a granule and often does -not represent an integer number of samples.

    - -

    In the event that audio frames are always encoded as the same number of -samples, the granule position could simply be a linear count of frames -since beginning of stream. This has the advantages of being exact and -efficient. Position in time would simply be [granule_position] * -[samples_per_frame] / [samples_per_second].

    - -

    Example: samplestamp (Vorbis)

    - -

    Frame counting is insufficient in codecs such as Vorbis where an audio -frame [packet] encodes a variable number of samples. In Vorbis's -case, the granule position is a count of the number of raw samples -from the beginning of stream; the absolute time of -a granule position is [granule_position] / -[samples_per_second].

    - -

    Example: bit-divided framestamp (Theora)

    - -

    Some video codecs may be able to use the simple framestamp scheme for -granule position. However, most modern video codecs introduce at -least the following complications:

    - -
      - -
    • video frames are relatively far apart compared to audio samples; -for this reason, the point at which a video frame changes to the next -frame is usually a strictly defined offset within the frame 'period'. -That is, video at 50fps could just as easily define frame transitions -<.015, .035, .055...> as at <.00, .02, .04...>.
      • - -
    • frame rates often include drop-frames, leap-frames or other -rational-but-non-integer timings.
      • - -
    • Decode must begin at a 'key frame' or 'I frame'. Keyframes usually -occur relatively seldom.
      • - -
    - -

    The first two points can be handled straightforwardly via the fact -that the codec has complete control mapping granule position to -absolute time; non-integer frame rates and offsets can be set in the -codec's initial header, and the rest is just arithmetic.

    - -

    The third point appears trickier at first glance, but it too can be -handled through the granule position mapping mechanism. Here we -arrange the granule position in such a way that granule positions of -key frames are easy to find. Divide the granule position into two -fields; the most-significant bits are an absolute frame counter, but -it's only updated at each key frame. The least significant bits encode -the number of frames since the last key frame. In this way, each -granule position both encodes the absolute time of the current frame -as well as the absolute time of the last key frame.

    - -

    Seeking to a most recent preceding key frame is then accomplished by -first seeking to the original desired point, inspecting the granulepos -of the resulting video page, extracting from that granulepos the -absolute time of the desired key frame, and then seeking directly to -that key frame's page. Of course, it's still possible for an -application to ignore key frames and use a simpler seeking algorithm -(decode would be unable to present decoded video until the next -key frame). Surprisingly many player applications do choose the -simpler approach.

    - -

    granule position, packets and pages

    - -

    Although each packet of data in a logical stream theoretically has a -specific granule position, only one granule position is encoded -per page. It is possible to encode a logical stream such that each -page contains only a single packet (so that granule positions are -preserved for each packet), however a one-to-one packet/page mapping -is not intended to be the general case.

    - -

    Because Ogg functions at the page, not packet, level, this -once-per-page time information provides Ogg with the finest-grained -time information is can use. Ogg passes this granule positioning data -to the codec (along with the packets extracted from a page); it is the -responsibility of codecs to track timing information at granularities -finer than a single page.

    - -

    start-time and end-time positioning

    - -

    A granule position represents the instantaneous time location -between two pages. However, continuous streams and discontinuous -streams differ on whether the granulepos represents the end-time of -the data on a page or the start-time. Continuous streams are -'end-time' encoded; the granulepos represents the point in time -immediately after the last data decoded from a page. Discontinuous -streams are 'start-time' encoded; the granulepos represents the point -in time of the first data decoded from the page.

    - -

    An Ogg stream type is declared continuous or discontinuous by its -codec. A given codec may support both continuous and discontinuous -operation so long as any given logical stream is continuous or -discontinuous for its entirety and the codec is able to ascertain (and -inform the Ogg layer) as to which after decoding the initial stream -header. The majority of codecs will always be continuous (such as -Vorbis) or discontinuous (such as Writ).

    - -

    Start- and end-time encoding do not affect multiplexing sort-order; -pages are still sorted by the absolute time a given granulepos maps to -regardless of whether that granulepos represents start- or -end-time.

    - -

    Multiplex/Demultiplex Division of Labor

    - -

    The Ogg multiplex/demultiplex layer provides mechanisms for encoding -raw packets into Ogg pages, decoding Ogg pages back into the original -codec packets, determining the logical structure of an Ogg stream, and -navigating through and synchronizing with an Ogg stream at a desired -stream location. Strict multiplex/demultiplex operations are entirely -in the Ogg domain and require no intervention from codecs.

    - -

    Implementation of more complex operations does require codec -knowledge, however. Unlike other framing systems, Ogg maintains -strict separation between framing and the framed bitstream data; Ogg -does not replicate codec-specific information in the page/framing -data, nor does Ogg blur the line between framing and stream -data/metadata. Because Ogg is fully data-agnostic toward the data it -frames, operations which require specifics of bitstream data (such as -'seek to key frame') also require interaction with the codec layer -(because, in this example, the Ogg layer is not aware of the concept -of key frames). This is different from systems that blur the -separation between framing and stream data in order to simplify the -separation of code. The Ogg system purposely keeps the distinction in -data simple so that later codec innovations are not constrained by -framing design.

    - -

    For this reason, however, complex seeking operations require -interaction with the codecs in order to decode the granule position of -a given stream type back to absolute time or in order to find -'decodable points' such as key frames in video.

    - -

    Unsorted Discussion Points

    - -

    flushes around key frames? RFC suggestion: repaginating or building a -stream this way is nice but not required

    - -

    Appendix A: multiplexing examples

    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/oggstream.html b/ExternalLibs/libogg-1.2.0/doc/oggstream.html deleted file mode 100644 index 485747d..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/oggstream.html +++ /dev/null @@ -1,493 +0,0 @@ - - - - - -Ogg Documentation - - - - - - - - - -

    Ogg bitstream overview

    - -This document serves as starting point for understanding the design -and implementation of the Ogg container format. If you're new to Ogg -or merely want a high-level technical overview, start reading here. -Other documents linked from the index page -give distilled technical descriptions and references of the container -mechanisms. This document is intended to aid understanding. - -

    Container format design points

    - -

    Ogg is intended to be a simplest-possible container, concerned only -with framing, ordering, and interleave. It can be used as a stream delivery -mechanism, for media file storage, or as a building block toward -implementing a more complex, non-linear container (for example, see -the Skeleton or Annodex/CMML). - -

    The Ogg container is not intended to be a monolithic -'kitchen-sink'. It exists only to frame and deliver in-order stream -data and as such is vastly simpler than most other containers. -Elementary and multiplexed streams are both constructed entirely from a -single building block (an Ogg page) comprised of eight fields -totalling twenty-eight bytes (the page header) a list of packet lengths -(up to 255 bytes) and payload data (up to 65025 bytes). The structure -of every page is the same. There are no optional fields or alternate -encodings. - -

    Stream and media metadata is contained in Ogg and not built into -the Ogg container itself. Metadata is thus compartmentalized and -layered rather than part of a monolithic design, an especially good -idea as no two groups seem able to agree on what a complete or -complete-enough metadata set should be. In this way, the container and -container implementation are isolated from unnecessary design flux. - -

    Streaming

    - -

    The Ogg container is primarily a streaming format, -encapsulating chronological, time-linear mixed media into a single -delivery stream or file. The design is such that an application can -always encode and/or decode all features of a bitstream in one pass -with no seeking and minimal buffering. Seeking to provide optimized -encoding (such as two-pass encoding) or interactive decoding (such as -scrubbing or instant replay) is not disallowed or discouraged, however -no container feature requires nonlinear access of the bitstream. - -

    Variable Bit Rate, Variable Payload Size

    - -

    Ogg is designed to contain any size data payload with bounded, -predictable efficiency. Ogg packets have no maximum size and a -zero-byte minimum size. There is no restriction on size changes from -packet to packet. Variable size packets do not require the use of any -optional or additional container features. There is no optimal -suggested packet size, though special consideration was paid to make -sure 50-200 byte packets were no less efficient than larger packet -sizes. The original design criteria was a 2% overhead at 50 byte -packets, dropping to a maximum working overhead of 1% with larger -packets, and a typical working overhead of .5-.7% for most practical -uses. - -

    Simple pagination

    - -

    Ogg is a byte-aligned container with no context-dependent, optional -or variable-length fields. Ogg requires no repacking of codec data. -The page structure is written out in-line as packet data is submitted -to the streaming abstraction. In addition, it is possible to -implement both Ogg mux and demux as MT-hot zero-copy abstractions (as -is done in the Tremor sourcebase). - -

    Capture

    - -

    Ogg is designed for efficient and immediate stream capture with -high confidence. Although packets have no size limit in Ogg, pages -are a maximum of just under 64kB meaning that any Ogg stream can be -captured with confidence after seeing 128kB of data or less [worst -case; typical figure is 6kB] from any random starting point in the -stream. - -

    Seeking

    - -

    Ogg implements simple coarse- and fine-grained seeking by design. - -

    Coarse seeking may be performed by simply 'moving the tone arm' to a -new position and 'dropping the needle'. Rapid capture with -accompanying timecode from any location in an Ogg file is guaranteed -by the stream design. From the acquisition of the first timecode, -all data needed to play back from that time code forward is ahead of -the stream cursor. - -

    Ogg implements full sample-granularity seeking using an -interpolated bisection search built on the capture and timecode -mechanisms used by coarse seeking. As above, once a search finds -the desired timecode, all data needed to play back from that time code -forward is ahead of the stream cursor. - -

    Both coarse and fine seeking use the page structure and sequencing -inherent to the Ogg format. All Ogg streams are fully seekable from -creation; seekability is unaffected by truncation or missing data, and -is tolerant of gross corruption. Seek operations are neither 'fuzzy' nor -heuristic. - -

    Seeking without use of an index is a major point of the Ogg -design. There are several reasons why Ogg forgoes an index: - -

      - -
    • It must be possible to create an Ogg stream in a single pass, and -an index requires either two passes to create, or the index must be -tacked onto the end of a live stream after the stream is finished. -Both methods run afoul of other design constraints. - -
    • An index is only marginally useful in Ogg for the complexity -added; it adds no new functionality and seldom improves performance -noticeably. Empirical testing shows that indexless interpolation -search does not require many more seeks in practice than using an -index would. - -
    • 'Optional' indexes encourage lazy implementations that can seek -only when indexes are present, or that implement indexless seeking -only by building an internal index after reading the entire file -beginning to end. This has been the fate of other containers that -specify optional indexing. - -
    - -

    Simple multiplexing

    - -

    Ogg multiplexes streams by interleaving pages from multiple elementary streams into a -multiplexed stream in time order. The multiplexed pages are not -altered. Muxing an Ogg AV stream out of separate audio, -video and data streams is akin to shuffling several decks of cards -together into a single deck; the cards themselves remain unchanged. -Demultiplexing is similarly simple (as the cards are marked). - -

    The goal of this design is to make the mux/demux operation as -trivial as possible to allow live streaming systems to build and -rebuild streams on the fly with minimal CPU usage and no additional -storage or latency requirements. - -

    Continuous and Discontinuous Media

    - -

    Ogg streams belong to one of two categories, "Continuous" streams and -"Discontinuous" streams. - -

    A stream that provides a gapless, time-continuous media type with a -fine-grained timebase is considered to be 'Continuous'. A continuous -stream should never be starved of data. Examples of continuous data -types include broadcast audio and video. - -

    A stream that delivers data in a potentially irregular pattern or -with widely spaced timing gaps is considered to be 'Discontinuous'. A -discontinuous stream may be best thought of as data representing -scattered events; although they happen in order, they are typically -unconnected data often located far apart. One example of a -discontinuous stream types would be captioning such as Ogg Kate. Although it's -possible to design captions as a continuous stream type, it's most -natural to think of captions as widely spaced pieces of text with -little happening between. - -

    The fundamental reason for distinction between continuous and -discontinuous streams concerns buffering. - -

    Buffering

    - -

    A continuous stream is, by definition, gapless. Ogg buffering is based -on the simple premise of never allowing an active continuous stream -to starve for data during decode; buffering works ahead until all -continuous streams in a physical stream have data ready and no further. - -

    Discontinuous stream data is not assumed to be predictable. The -buffering design takes discontinuous data 'as it comes' rather than -working ahead to look for future discontinuous data for a potentially -unbounded period. Thus, the buffering process makes no attempt to fill -discontinuous stream buffers; their pages simply 'fall out' of the -stream when continuous streams are handled properly. - -

    Buffering requirements in this design need not be explicitly -declared or managed in the encoded stream. The decoder simply reads as -much data as is necessary to keep all continuous stream types gapless -and no more, with discontinuous data processed as it arrives in the -continuous data. Buffering is implicitly optimal for the given -stream. Because all pages of all data types are stamped with absolute -timing information within the stream, inter-stream synchronization -timing is always maintained without the need for explicitly declared -buffer-ahead hinting. - -

    Codec metadata

    - -

    Ogg does not replicate codec-specific metadata into the mux layer -in an attempt to make the mux and codec layer implementations 'fully -separable'. Things like specific timebase, keyframing strategy, frame -duration, etc, do not appear in the Ogg container. The mux layer is, -instead, expected to query a codec through a standardized interface, -left to the implementation, for this data when it is needed. - -

    Though modern design wisdom usually prefers to predict all possible -needs of current and future codecs then embed these dependencies and -the required metadata into the container itself, this strategy -increases container specification complexity, fragility, and rigidity. -The mux and codec implementations become more independent, but the -specifications become less independent. A codec can't do what a -container hasn't already provided for. New codecs are harder to -support, and you can do fewer useful things with the ones you've -already got (eg, try to make a good splitter without using any codecs. -You're stuck splitting at keyframes only, or building yet another new -mechanism into the container layer to mark what frames to skip -displaying). - -

    Ogg's design goes the opposite direction, where the specification -is to be as simple, easy to understand, and 'proofed' against novel -codecs as possible. When an Ogg mux layer requires codec-specific -information, it queries the codec (or a codec stub). This trades a -more complex implementation for a simpler, more flexible -specification. - -

    Stream structure metadata

    - -

    The Ogg container itself does not define a metadata system for -declaring the structure and interrelations between multiple media -types in a muxed stream. That is, the Ogg container itself does not -specify data like 'which steam is the subtitle stream?' or 'which -video stream is the primary angle?'. This metadata still exists, but -is stored in the Ogg container rather than being built into the Ogg -container. Xiph specifies the 'Skeleton' metadata format for Ogg -streams, but this decoupling of container and stream structure -metadata means it is possible to use Ogg with any metadata -specification without altering the container itself, or without stream -structure metadata at all. - -

    Frame accurate absolute position

    - -

    Every Ogg page is stamped with a 64 bit 'granule position' that -serves as an absolute timestamp for mux and seeking. A few nifty -little tricks are usually also embedded in the granpos state, but -we'll leave those aside for the moment (strictly speaking, they're -part of each codec's mapping, not Ogg). - -

    As previously mentioned above, granule positions are mapped into -absolute timestamps by the codec, rather than being a hard timestamp. -This allows maximally efficient use of the available 64 bits to -address every sample/frame position without approximation while -supporting new and previously unknown timebase encodings without -needing to extend or update the mux layer. When a codec needs a novel -timebase, it simply brings the code for that mapping along with it. -This is not a theoretical curiosity; new, wholly novel timebases were -deployed with the adoption of both Theora and Dirac. "Rolling INTRA" -(keyframeless video) also benefits from novel use of the granule -position. - -

    Ogg stream arrangement

    - -

    Packets, pages, and bitstreams

    - -

    Ogg codecs use packets. Packets are octet payloads of -raw, compressed data, containing the data needed for a single -decompressed unit, eg, one video frame. Packets have no maximum size -and may be zero length. They do not have any high-level structure or -boundary information; strung together, the unframed packets form a -logical bitstream of apparently random bytes with no internal -landmarks. - -

    Logical bitstream packets are grouped and framed into Ogg pages -along with a unique stream serial number to produce a -physical bitstream. An elementary stream is a -physical bitstream containing only the pages framing a single logical -bitstream. Each page is a self contained entity, although a packet may -be split and encoded across one or more pages. The page decode -mechanism is designed to recognize, verify and handle single pages at -a time from the overall bitstream. - -

    Ogg Bitstream Framing specifies -the page format of an Ogg bitstream, the packet coding process -and elementary bitstreams in detail. - -

    Multiplexed bitstreams

    - -

    Multiple logical/elementary bitstreams can be combined into a single -multiplexed bitstream by interleaving whole pages from each -contributing elementary stream in time order. The result is a single -physical stream that multiplexes and frames multiple logical streams. -Each logical stream is identified by the unique stream serial number -stamped in its pages. A physical stream may include a 'meta-header' -(such as the Ogg Skeleton) comprising its -own Ogg page at the beginning of the physical stream. A decoder -recovers the original logical/elementary bitstreams out of the -physical bitstream by taking the pages in order from the physical -bitstream and redirecting them into the appropriate logical decoding -entity. - -

    Ogg Bitstream Multiplexing specifies -proper multiplexing of an Ogg bitstream in detail. - -

    Chaining

    - -

    Multiple Ogg physical bitstreams may be concatenated into a single new -stream; this is chaining. The bitstreams do not overlap; the -final page of a given logical bitstream is immediately followed by the -initial page of the next.

    - -

    Each logical bitstream in a chain must have a unique serial number -within the scope of the full physical bitstream, not only within a -particular link or segment of the chain.

    - -

    Continuous and discontinuous streams

    - -

    Within Ogg, each stream must be declared (by the codec) to be -continuous- or discontinuous-time. Most codecs treat all streams they -use as either inherently continuous- or discontinuous-time, although -this is not a requirement. A codec may, as part of its mapping, choose -according to data in the initial header. - -

    Continuous-time pages are stamped by end-time, discontinuous pages -are stamped by begin-time. Pages in a multiplexed stream are -interleaved in order of the time stamp regardless of stream type. -Both continuous and discontinuous logical streams are used to seek -within a physical stream, however only continuous streams are used to -determine buffering depth; because discontinuous streams are stamped -by start time, they will always 'fall out' in time when buffering -tracks only the continuous streams. See 'Examples' for an -illustration of the buffering mechanism. - -

    Mapping Requirements

    - -

    Each codec is allowed some freedom in deciding how its logical -bitstream is encapsulated into an Ogg bitstream (even if it is a -trivial mapping, eg, 'plop the packets in and go'). This is the -codec's mapping. Ogg imposes a few mapping requirements -on any codec. - -

    The framing specification defines -'beginning of stream' and 'end of stream' page markers via a header -flag (it is possible for a stream to consist of a single page). A -correct stream always consists of an integer number of pages, an easy -requirement given the variable size nature of pages.

    - -

    The first page of an elementary Ogg bitstream consists of a single, -small 'initial header' packet that must include sufficient information -to identify the exact CODEC type. From this initial header, the codec -must also be able to determine its timebase and whether or not it is a -continuous- or discontinuous-time stream. The initial header must fit -on a single page. If a codec makes use of auxiliary headers (for -example, Vorbis uses two auxiliary headers), these headers must follow -the initial header immediately. The last header finishes its page; -data begins on a fresh page. - -

    As an example, Ogg Vorbis places the name and revision of the -Vorbis CODEC, the audio rate and the audio quality into this initial -header. Comments and detailed codec setup appears in the larger -auxiliary headers.

    - -

    Multiplexing Requirements

    - -

    Multiplexing requirements within Ogg are straightforward. When -constructing a single-link (unchained) physical bitstream consisting -of multiple elementary streams: - -

      - -
    1. The initial header for each stream appears in sequence, each -header on a single page. All initial headers must appear with no -intervening data (no auxiliary header pages or packets, no data pages -or packets). Order of the initial headers is unspecified. The -'beginning of stream' flag is set on each initial header. - -
    2. All auxiliary headers for all streams must follow. Order -is unspecified. The final auxiliary header of each stream must flush -its page. - -
    3. Data pages for each stream follow, interleaved in time order. - -
    4. The final page of each stream sets the 'end of stream' flag. -Unlike initial pages, terminal pages for the logical bitstreams need -not occur contiguously; indeed it may not be possible for them to do so. -
    - -

    Each grouped bitstream must have a unique serial number within the -scope of the physical bitstream.

    - -

    chaining and multiplexing

    - -

    Multiplexed and/or unmultiplexed bitstreams may be chained -consecutively. Such a physical bitstream obeys all the rules of both -chained and multiplexed streams. Each link, when unchained, must -stand on its own as a valid physical bitstream. Chained streams do -not mix; a new segment may not begin until all streams in the -preceding segment have terminated.

    - -

    Examples

    - -[More to come shortly; this section is currently being revised and expanded] - -

    Below, we present an example of a multiplexed and chained bitstream:

    - -

    stream

    - -

    In this example, we see pages from five total logical bitstreams -multiplexed into a physical bitstream. Note the following -characteristics:

    - -
      -
    1. Multiplexed bitstreams in a given link begin together; all of the -initial pages must appear before any data pages. When concurrently -multiplexed groups are chained, the new group does not begin until all -the bitstreams in the previous group have terminated.
      2. - -
    2. The ordering of pages of concurrently multiplexed bitstreams is -goverened by timestamp (not shown here); there is no regular -interleaving order. Pages within a logical bitstream appear in -sequence order.
      3. -
    - - - - - diff --git a/ExternalLibs/libogg-1.2.0/doc/rfc3533.txt b/ExternalLibs/libogg-1.2.0/doc/rfc3533.txt deleted file mode 100644 index f2fcd1a..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/rfc3533.txt +++ /dev/null @@ -1,843 +0,0 @@ - - - - - - -Network Working Group S. Pfeiffer -Request for Comments: 3533 CSIRO -Category: Informational May 2003 - - - The Ogg Encapsulation Format Version 0 - -Status of this Memo - - This memo provides information for the Internet community. It does - not specify an Internet standard of any kind. Distribution of this - memo is unlimited. - -Copyright Notice - - Copyright (C) The Internet Society (2003). All Rights Reserved. - -Abstract - - This document describes the Ogg bitstream format version 0, which is - a general, freely-available encapsulation format for media streams. - It is able to encapsulate any kind and number of video and audio - encoding formats as well as other data streams in a single bitstream. - -Terminology - - The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", - "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this - document are to be interpreted as described in BCP 14, RFC 2119 [2]. - -Table of Contents - - 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3. Requirements for a generic encapsulation format . . . . . . . 3 - 4. The Ogg bitstream format . . . . . . . . . . . . . . . . . . . 3 - 5. The encapsulation process . . . . . . . . . . . . . . . . . . 6 - 6. The Ogg page format . . . . . . . . . . . . . . . . . . . . . 9 - 7. Security Considerations . . . . . . . . . . . . . . . . . . . 11 - 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - A. Glossary of terms and abbreviations . . . . . . . . . . . . . 13 - B. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14 - Author's Address . . . . . . . . . . . . . . . . . . . . . . . 14 - Full Copyright Statement . . . . . . . . . . . . . . . . . . . 15 - - - - - - - -Pfeiffer Informational [Page 1] - -RFC 3533 OGG May 2003 - - -1. Introduction - - The Ogg bitstream format has been developed as a part of a larger - project aimed at creating a set of components for the coding and - decoding of multimedia content (codecs) which are to be freely - available and freely re-implementable, both in software and in - hardware for the computing community at large, including the Internet - community. It is the intention of the Ogg developers represented by - Xiph.Org that it be usable without intellectual property concerns. - - This document describes the Ogg bitstream format and how to use it to - encapsulate one or several media bitstreams created by one or several - encoders. The Ogg transport bitstream is designed to provide - framing, error protection and seeking structure for higher-level - codec streams that consist of raw, unencapsulated data packets, such - as the Vorbis audio codec or the upcoming Tarkin and Theora video - codecs. It is capable of interleaving different binary media and - other time-continuous data streams that are prepared by an encoder as - a sequence of data packets. Ogg provides enough information to - properly separate data back into such encoder created data packets at - the original packet boundaries without relying on decoding to find - packet boundaries. - - Please note that the MIME type application/ogg has been registered - with the IANA [1]. - -2. Definitions - - For describing the Ogg encapsulation process, a set of terms will be - used whose meaning needs to be well understood. Therefore, some of - the most fundamental terms are defined now before we start with the - description of the requirements for a generic media stream - encapsulation format, the process of encapsulation, and the concrete - format of the Ogg bitstream. See the Appendix for a more complete - glossary. - - The result of an Ogg encapsulation is called the "Physical (Ogg) - Bitstream". It encapsulates one or several encoder-created - bitstreams, which are called "Logical Bitstreams". A logical - bitstream, provided to the Ogg encapsulation process, has a - structure, i.e., it is split up into a sequence of so-called - "Packets". The packets are created by the encoder of that logical - bitstream and represent meaningful entities for that encoder only - (e.g., an uncompressed stream may use video frames as packets). They - do not contain boundary information - strung together they appear to - be streams of random bytes with no landmarks. - - - - - -Pfeiffer Informational [Page 2] - -RFC 3533 OGG May 2003 - - - Please note that the term "packet" is not used in this document to - signify entities for transport over a network. - -3. Requirements for a generic encapsulation format - - The design idea behind Ogg was to provide a generic, linear media - transport format to enable both file-based storage and stream-based - transmission of one or several interleaved media streams independent - of the encoding format of the media data. Such an encapsulation - format needs to provide: - - o framing for logical bitstreams. - - o interleaving of different logical bitstreams. - - o detection of corruption. - - o recapture after a parsing error. - - o position landmarks for direct random access of arbitrary positions - in the bitstream. - - o streaming capability (i.e., no seeking is needed to build a 100% - complete bitstream). - - o small overhead (i.e., use no more than approximately 1-2% of - bitstream bandwidth for packet boundary marking, high-level - framing, sync and seeking). - - o simplicity to enable fast parsing. - - o simple concatenation mechanism of several physical bitstreams. - - All of these design considerations have been taken into consideration - for Ogg. Ogg supports framing and interleaving of logical - bitstreams, seeking landmarks, detection of corruption, and stream - resynchronisation after a parsing error with no more than - approximately 1-2% overhead. It is a generic framework to perform - encapsulation of time-continuous bitstreams. It does not know any - specifics about the codec data that it encapsulates and is thus - independent of any media codec. - -4. The Ogg bitstream format - - A physical Ogg bitstream consists of multiple logical bitstreams - interleaved in so-called "Pages". Whole pages are taken in order - from multiple logical bitstreams multiplexed at the page level. The - logical bitstreams are identified by a unique serial number in the - - - -Pfeiffer Informational [Page 3] - -RFC 3533 OGG May 2003 - - - header of each page of the physical bitstream. This unique serial - number is created randomly and does not have any connection to the - content or encoder of the logical bitstream it represents. Pages of - all logical bitstreams are concurrently interleaved, but they need - not be in a regular order - they are only required to be consecutive - within the logical bitstream. Ogg demultiplexing reconstructs the - original logical bitstreams from the physical bitstream by taking the - pages in order from the physical bitstream and redirecting them into - the appropriate logical decoding entity. - - Each Ogg page contains only one type of data as it belongs to one - logical bitstream only. Pages are of variable size and have a page - header containing encapsulation and error recovery information. Each - logical bitstream in a physical Ogg bitstream starts with a special - start page (bos=beginning of stream) and ends with a special page - (eos=end of stream). - - The bos page contains information to uniquely identify the codec type - and MAY contain information to set up the decoding process. The bos - page SHOULD also contain information about the encoded media - for - example, for audio, it should contain the sample rate and number of - channels. By convention, the first bytes of the bos page contain - magic data that uniquely identifies the required codec. It is the - responsibility of anyone fielding a new codec to make sure it is - possible to reliably distinguish his/her codec from all other codecs - in use. There is no fixed way to detect the end of the codec- - identifying marker. The format of the bos page is dependent on the - codec and therefore MUST be given in the encapsulation specification - of that logical bitstream type. Ogg also allows but does not require - secondary header packets after the bos page for logical bitstreams - and these must also precede any data packets in any logical - bitstream. These subsequent header packets are framed into an - integral number of pages, which will not contain any data packets. - So, a physical bitstream begins with the bos pages of all logical - bitstreams containing one initial header packet per page, followed by - the subsidiary header packets of all streams, followed by pages - containing data packets. - - The encapsulation specification for one or more logical bitstreams is - called a "media mapping". An example for a media mapping is "Ogg - Vorbis", which uses the Ogg framework to encapsulate Vorbis-encoded - audio data for stream-based storage (such as files) and transport - (such as TCP streams or pipes). Ogg Vorbis provides the name and - revision of the Vorbis codec, the audio rate and the audio quality on - the Ogg Vorbis bos page. It also uses two additional header pages - per logical bitstream. The Ogg Vorbis bos page starts with the byte - 0x01, followed by "vorbis" (a total of 7 bytes of identifier). - - - - -Pfeiffer Informational [Page 4] - -RFC 3533 OGG May 2003 - - - Ogg knows two types of multiplexing: concurrent multiplexing (so- - called "Grouping") and sequential multiplexing (so-called - "Chaining"). Grouping defines how to interleave several logical - bitstreams page-wise in the same physical bitstream. Grouping is for - example needed for interleaving a video stream with several - synchronised audio tracks using different codecs in different logical - bitstreams. Chaining on the other hand, is defined to provide a - simple mechanism to concatenate physical Ogg bitstreams, as is often - needed for streaming applications. - - In grouping, all bos pages of all logical bitstreams MUST appear - together at the beginning of the Ogg bitstream. The media mapping - specifies the order of the initial pages. For example, the grouping - of a specific Ogg video and Ogg audio bitstream may specify that the - physical bitstream MUST begin with the bos page of the logical video - bitstream, followed by the bos page of the audio bitstream. Unlike - bos pages, eos pages for the logical bitstreams need not all occur - contiguously. Eos pages may be 'nil' pages, that is, pages - containing no content but simply a page header with position - information and the eos flag set in the page header. Each grouped - logical bitstream MUST have a unique serial number within the scope - of the physical bitstream. - - In chaining, complete logical bitstreams are concatenated. The - bitstreams do not overlap, i.e., the eos page of a given logical - bitstream is immediately followed by the bos page of the next. Each - chained logical bitstream MUST have a unique serial number within the - scope of the physical bitstream. - - It is possible to consecutively chain groups of concurrently - multiplexed bitstreams. The groups, when unchained, MUST stand on - their own as a valid concurrently multiplexed bitstream. The - following diagram shows a schematic example of such a physical - bitstream that obeys all the rules of both grouped and chained - multiplexed bitstreams. - - physical bitstream with pages of - different logical bitstreams grouped and chained - ------------------------------------------------------------- - |*A*|*B*|*C*|A|A|C|B|A|B|#A#|C|...|B|C|#B#|#C#|*D*|D|...|#D#| - ------------------------------------------------------------- - bos bos bos eos eos eos bos eos - - In this example, there are two chained physical bitstreams, the first - of which is a grouped stream of three logical bitstreams A, B, and C. - The second physical bitstream is chained after the end of the grouped - bitstream, which ends after the last eos page of all its grouped - logical bitstreams. As can be seen, grouped bitstreams begin - - - -Pfeiffer Informational [Page 5] - -RFC 3533 OGG May 2003 - - - together - all of the bos pages MUST appear before any data pages. - It can also be seen that pages of concurrently multiplexed bitstreams - need not conform to a regular order. And it can be seen that a - grouped bitstream can end long before the other bitstreams in the - group end. - - Ogg does not know any specifics about the codec data except that each - logical bitstream belongs to a different codec, the data from the - codec comes in order and has position markers (so-called "Granule - positions"). Ogg does not have a concept of 'time': it only knows - about sequentially increasing, unitless position markers. An - application can only get temporal information through higher layers - which have access to the codec APIs to assign and convert granule - positions or time. - - A specific definition of a media mapping using Ogg may put further - constraints on its specific use of the Ogg bitstream format. For - example, a specific media mapping may require that all the eos pages - for all grouped bitstreams need to appear in direct sequence. An - example for a media mapping is the specification of "Ogg Vorbis". - Another example is the upcoming "Ogg Theora" specification which - encapsulates Theora-encoded video data and usually comes multiplexed - with a Vorbis stream for an Ogg containing synchronised audio and - video. As Ogg does not specify temporal relationships between the - encapsulated concurrently multiplexed bitstreams, the temporal - synchronisation between the audio and video stream will be specified - in this media mapping. To enable streaming, pages from various - logical bitstreams will typically be interleaved in chronological - order. - -5. The encapsulation process - - The process of multiplexing different logical bitstreams happens at - the level of pages as described above. The bitstreams provided by - encoders are however handed over to Ogg as so-called "Packets" with - packet boundaries dependent on the encoding format. The process of - encapsulating packets into pages will be described now. - - From Ogg's perspective, packets can be of any arbitrary size. A - specific media mapping will define how to group or break up packets - from a specific media encoder. As Ogg pages have a maximum size of - about 64 kBytes, sometimes a packet has to be distributed over - several pages. To simplify that process, Ogg divides each packet - into 255 byte long chunks plus a final shorter chunk. These chunks - are called "Ogg Segments". They are only a logical construct and do - not have a header for themselves. - - - - - -Pfeiffer Informational [Page 6] - -RFC 3533 OGG May 2003 - - - A group of contiguous segments is wrapped into a variable length page - preceded by a header. A segment table in the page header tells about - the "Lacing values" (sizes) of the segments included in the page. A - flag in the page header tells whether a page contains a packet - continued from a previous page. Note that a lacing value of 255 - implies that a second lacing value follows in the packet, and a value - of less than 255 marks the end of the packet after that many - additional bytes. A packet of 255 bytes (or a multiple of 255 bytes) - is terminated by a lacing value of 0. Note also that a 'nil' (zero - length) packet is not an error; it consists of nothing more than a - lacing value of zero in the header. - - The encoding is optimized for speed and the expected case of the - majority of packets being between 50 and 200 bytes large. This is a - design justification rather than a recommendation. This encoding - both avoids imposing a maximum packet size as well as imposing - minimum overhead on small packets. In contrast, e.g., simply using - two bytes at the head of every packet and having a max packet size of - 32 kBytes would always penalize small packets (< 255 bytes, the - typical case) with twice the segmentation overhead. Using the lacing - values as suggested, small packets see the minimum possible byte- - aligned overhead (1 byte) and large packets (>512 bytes) see a fairly - constant ~0.5% overhead on encoding space. - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 7] - -RFC 3533 OGG May 2003 - - - The following diagram shows a schematic example of a media mapping - using Ogg and grouped logical bitstreams: - - logical bitstream with packet boundaries - ----------------------------------------------------------------- - > | packet_1 | packet_2 | packet_3 | < - ----------------------------------------------------------------- - - |segmentation (logically only) - v - - packet_1 (5 segments) packet_2 (4 segs) p_3 (2 segs) - ------------------------------ -------------------- ------------ - .. |seg_1|seg_2|seg_3|seg_4|s_5 | |seg_1|seg_2|seg_3|| |seg_1|s_2 | .. - ------------------------------ -------------------- ------------ - - | page encapsulation - v - - page_1 (packet_1 data) page_2 (pket_1 data) page_3 (packet_2 data) ------------------------- ---------------- ------------------------ -|H|------------------- | |H|----------- | |H|------------------- | -|D||seg_1|seg_2|seg_3| | |D|seg_4|s_5 | | |D||seg_1|seg_2|seg_3| | ... -|R|------------------- | |R|----------- | |R|------------------- | ------------------------- ---------------- ------------------------ - - | -pages of | -other --------| | -logical ------- -bitstreams | MUX | - ------- - | - v - - page_1 page_2 page_3 - ------ ------ ------- ----- ------- - ... || | || | || | || | || | ... - ------ ------ ------- ----- ------- - physical Ogg bitstream - - In this example we take a snapshot of the encapsulation process of - one logical bitstream. We can see part of that bitstream's - subdivision into packets as provided by the codec. The Ogg - encapsulation process chops up the packets into segments. The - packets in this example are rather large such that packet_1 is split - into 5 segments - 4 segments with 255 bytes and a final smaller one. - Packet_2 is split into 4 segments - 3 segments with 255 bytes and a - - - -Pfeiffer Informational [Page 8] - -RFC 3533 OGG May 2003 - - - final very small one - and packet_3 is split into two segments. The - encapsulation process then creates pages, which are quite small in - this example. Page_1 consists of the first three segments of - packet_1, page_2 contains the remaining 2 segments from packet_1, and - page_3 contains the first three pages of packet_2. Finally, this - logical bitstream is multiplexed into a physical Ogg bitstream with - pages of other logical bitstreams. - -6. The Ogg page format - - A physical Ogg bitstream consists of a sequence of concatenated - pages. Pages are of variable size, usually 4-8 kB, maximum 65307 - bytes. A page header contains all the information needed to - demultiplex the logical bitstreams out of the physical bitstream and - to perform basic error recovery and landmarks for seeking. Each page - is a self-contained entity such that the page decode mechanism can - recognize, verify, and handle single pages at a time without - requiring the overall bitstream. - - The Ogg page header has the following format: - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1| Byte -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| capture_pattern: Magic number for page start "OggS" | 0-3 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| version | header_type | granule_position | 4-7 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | 8-11 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | bitstream_serial_number | 12-15 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | page_sequence_number | 16-19 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| | CRC_checksum | 20-23 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| |page_segments | segment_table | 24-27 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -| ... | 28- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - The LSb (least significant bit) comes first in the Bytes. Fields - with more than one byte length are encoded LSB (least significant - byte) first. - - - - - - - -Pfeiffer Informational [Page 9] - -RFC 3533 OGG May 2003 - - - The fields in the page header have the following meaning: - - 1. capture_pattern: a 4 Byte field that signifies the beginning of a - page. It contains the magic numbers: - - 0x4f 'O' - - 0x67 'g' - - 0x67 'g' - - 0x53 'S' - - It helps a decoder to find the page boundaries and regain - synchronisation after parsing a corrupted stream. Once the - capture pattern is found, the decoder verifies page sync and - integrity by computing and comparing the checksum. - - 2. stream_structure_version: 1 Byte signifying the version number of - the Ogg file format used in this stream (this document specifies - version 0). - - 3. header_type_flag: the bits in this 1 Byte field identify the - specific type of this page. - - * bit 0x01 - - set: page contains data of a packet continued from the previous - page - - unset: page contains a fresh packet - - * bit 0x02 - - set: this is the first page of a logical bitstream (bos) - - unset: this page is not a first page - - * bit 0x04 - - set: this is the last page of a logical bitstream (eos) - - unset: this page is not a last page - - 4. granule_position: an 8 Byte field containing position information. - For example, for an audio stream, it MAY contain the total number - of PCM samples encoded after including all frames finished on this - page. For a video stream it MAY contain the total number of video - - - -Pfeiffer Informational [Page 10] - -RFC 3533 OGG May 2003 - - - frames encoded after this page. This is a hint for the decoder - and gives it some timing and position information. Its meaning is - dependent on the codec for that logical bitstream and specified in - a specific media mapping. A special value of -1 (in two's - complement) indicates that no packets finish on this page. - - 5. bitstream_serial_number: a 4 Byte field containing the unique - serial number by which the logical bitstream is identified. - - 6. page_sequence_number: a 4 Byte field containing the sequence - number of the page so the decoder can identify page loss. This - sequence number is increasing on each logical bitstream - separately. - - 7. CRC_checksum: a 4 Byte field containing a 32 bit CRC checksum of - the page (including header with zero CRC field and page content). - The generator polynomial is 0x04c11db7. - - 8. number_page_segments: 1 Byte giving the number of segment entries - encoded in the segment table. - - 9. segment_table: number_page_segments Bytes containing the lacing - values of all segments in this page. Each Byte contains one - lacing value. - - The total header size in bytes is given by: - header_size = number_page_segments + 27 [Byte] - - The total page size in Bytes is given by: - page_size = header_size + sum(lacing_values: 1..number_page_segments) - [Byte] - -7. Security Considerations - - The Ogg encapsulation format is a container format and only - encapsulates content (such as Vorbis-encoded audio). It does not - provide for any generic encryption or signing of itself or its - contained content bitstreams. However, it encapsulates any kind of - content bitstream as long as there is a codec for it, and is thus - able to contain encrypted and signed content data. It is also - possible to add an external security mechanism that encrypts or signs - an Ogg physical bitstream and thus provides content confidentiality - and authenticity. - - As Ogg encapsulates binary data, it is possible to include executable - content in an Ogg bitstream. This can be an issue with applications - that are implemented using the Ogg format, especially when Ogg is - used for streaming or file transfer in a networking scenario. As - - - -Pfeiffer Informational [Page 11] - -RFC 3533 OGG May 2003 - - - such, Ogg does not pose a threat there. However, an application - decoding Ogg and its encapsulated content bitstreams has to ensure - correct handling of manipulated bitstreams, of buffer overflows and - the like. - -8. References - - [1] Walleij, L., "The application/ogg Media Type", RFC 3534, May - 2003. - - [2] Bradner, S., "Key words for use in RFCs to Indicate Requirement - Levels", BCP 14, RFC 2119, March 1997. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 12] - -RFC 3533 OGG May 2003 - - -Appendix A. Glossary of terms and abbreviations - - bos page: The initial page (beginning of stream) of a logical - bitstream which contains information to identify the codec type - and other decoding-relevant information. - - chaining (or sequential multiplexing): Concatenation of two or more - complete physical Ogg bitstreams. - - eos page: The final page (end of stream) of a logical bitstream. - - granule position: An increasing position number for a specific - logical bitstream stored in the page header. Its meaning is - dependent on the codec for that logical bitstream and specified in - a specific media mapping. - - grouping (or concurrent multiplexing): Interleaving of pages of - several logical bitstreams into one complete physical Ogg - bitstream under the restriction that all bos pages of all grouped - logical bitstreams MUST appear before any data pages. - - lacing value: An entry in the segment table of a page header - representing the size of the related segment. - - logical bitstream: A sequence of bits being the result of an encoded - media stream. - - media mapping: A specific use of the Ogg encapsulation format - together with a specific (set of) codec(s). - - (Ogg) packet: A subpart of a logical bitstream that is created by the - encoder for that bitstream and represents a meaningful entity for - the encoder, but only a sequence of bits to the Ogg encapsulation. - - (Ogg) page: A physical bitstream consists of a sequence of Ogg pages - containing data of one logical bitstream only. It usually - contains a group of contiguous segments of one packet only, but - sometimes packets are too large and need to be split over several - pages. - - physical (Ogg) bitstream: The sequence of bits resulting from an Ogg - encapsulation of one or several logical bitstreams. It consists - of a sequence of pages from the logical bitstreams with the - restriction that the pages of one logical bitstream MUST come in - their correct temporal order. - - - - - - -Pfeiffer Informational [Page 13] - -RFC 3533 OGG May 2003 - - - (Ogg) segment: The Ogg encapsulation process splits each packet into - chunks of 255 bytes plus a last fractional chunk of less than 255 - bytes. These chunks are called segments. - -Appendix B. Acknowledgements - - The author gratefully acknowledges the work that Christopher - Montgomery and the Xiph.Org foundation have done in defining the Ogg - multimedia project and as part of it the open file format described - in this document. The author hopes that providing this document to - the Internet community will help in promoting the Ogg multimedia - project at http://www.xiph.org/. Many thanks also for the many - technical and typo corrections that C. Montgomery and the Ogg - community provided as feedback to this RFC. - -Author's Address - - Silvia Pfeiffer - CSIRO, Australia - Locked Bag 17 - North Ryde, NSW 2113 - Australia - - Phone: +61 2 9325 3141 - EMail: Silvia.Pfeiffer@csiro.au - URI: http://www.cmis.csiro.au/Silvia.Pfeiffer/ - - - - - - - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 14] - -RFC 3533 OGG May 2003 - - -Full Copyright Statement - - Copyright (C) The Internet Society (2003). All Rights Reserved. - - This document and translations of it may be copied and furnished to - others, and derivative works that comment on or otherwise explain it - or assist in its implementation may be prepared, copied, published - and distributed, in whole or in part, without restriction of any - kind, provided that the above copyright notice and this paragraph are - included on all such copies and derivative works. However, this - document itself may not be modified in any way, such as by removing - the copyright notice or references to the Internet Society or other - Internet organizations, except as needed for the purpose of - developing Internet standards in which case the procedures for - copyrights defined in the Internet Standards process must be - followed, or as required to translate it into languages other than - English. - - The limited permissions granted above are perpetual and will not be - revoked by the Internet Society or its successors or assigns. - - This document and the information contained herein is provided on an - "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING - TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING - BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION - HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF - MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. - -Acknowledgement - - Funding for the RFC Editor function is currently provided by the - Internet Society. - - - - - - - - - - - - - - - - - - - -Pfeiffer Informational [Page 15] - diff --git a/ExternalLibs/libogg-1.2.0/doc/rfc5334.txt b/ExternalLibs/libogg-1.2.0/doc/rfc5334.txt deleted file mode 100644 index fea91fb..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/rfc5334.txt +++ /dev/null @@ -1,787 +0,0 @@ - - - - - - -Network Working Group I. Goncalves -Request for Comments: 5334 S. Pfeiffer -Obsoletes: 3534 C. Montgomery -Category: Standards Track Xiph - September 2008 - - - Ogg Media Types - -Status of This Memo - - This document specifies an Internet standards track protocol for the - Internet community, and requests discussion and suggestions for - improvements. Please refer to the current edition of the "Internet - Official Protocol Standards" (STD 1) for the standardization state - and status of this protocol. Distribution of this memo is unlimited. - -Abstract - - This document describes the registration of media types for the Ogg - container format and conformance requirements for implementations of - these types. This document obsoletes RFC 3534. - -Table of Contents - - 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 2 - 2. Changes Since RFC 3534 . . . . . . . . . . . . . . . . . . 2 - 3. Conformance and Document Conventions . . . . . . . . . . . 3 - 4. Deployed Media Types and Compatibility . . . . . . . . . . 3 - 5. Relation between the Media Types . . . . . . . . . . . . . 5 - 6. Encoding Considerations . . . . . . . . . . . . . . . . . . 5 - 7. Security Considerations . . . . . . . . . . . . . . . . . . 6 - 8. Interoperability Considerations . . . . . . . . . . . . . . 7 - 9. IANA Considerations . . . . . . . . . . . . . . . . . . . . 7 - 10. Ogg Media Types . . . . . . . . . . . . . . . . . . . . . . 7 - 10.1. application/ogg . . . . . . . . . . . . . . . . . . . . . . 7 - 10.2. video/ogg . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 10.3. audio/ogg . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . 10 - 12. Copying Conditions . . . . . . . . . . . . . . . . . . . . 10 - 13. References . . . . . . . . . . . . . . . . . . . . . . . . 11 - 13.1. Normative References . . . . . . . . . . . . . . . . . . . 11 - 13.2. Informative References . . . . . . . . . . . . . . . . . . 11 - - - - - - - - -Goncalves, et al. Standards Track [Page 1] - -RFC 5334 Ogg Media Types September 2008 - - -1. Introduction - - This document describes media types for Ogg, a data encapsulation - format defined by the Xiph.Org Foundation for public use. Refer to - "Introduction" in [RFC3533] and "Overview" in [Ogg] for background - information on this container format. - - Binary data contained in Ogg, such as Vorbis and Theora, has - historically been interchanged using the application/ogg media type - as defined by [RFC3534]. This document obsoletes [RFC3534] and - defines three media types for different types of content in Ogg to - reflect this usage in the IANA media type registry, to foster - interoperability by defining underspecified aspects, and to provide - general security considerations. - - The Ogg container format is known to contain [Theora] or [Dirac] - video, [Speex] (narrow-band and wide-band) speech, [Vorbis] or [FLAC] - audio, and [CMML] timed text/metadata. As Ogg encapsulates binary - data, it is possible to include any other type of video, audio, - image, text, or, generally speaking, any time-continuously sampled - data. - - While raw packets from these data sources may be used directly by - transport mechanisms that provide their own framing and packet- - separation mechanisms (such as UDP datagrams or RTP), Ogg is a - solution for stream based storage (such as files) and transport (such - as TCP streams or pipes). The media types defined in this document - are needed to correctly identify such content when it is served over - HTTP, included in multi-part documents, or used in other places where - media types [RFC2045] are used. - -2. Changes Since RFC 3534 - - o The type "application/ogg" is redefined. - - o The types "video/ogg" and "audio/ogg" are defined. - - o New file extensions are defined. - - o New Macintosh file type codes are defined. - - o The codecs parameter is defined for optional use. - - o The Ogg Skeleton extension becomes a recommended addition for - content served under the new types. - - - - - - -Goncalves, et al. Standards Track [Page 2] - -RFC 5334 Ogg Media Types September 2008 - - -3. Conformance and Document Conventions - - The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", - "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this - document are to be interpreted as described in BCP 14, [RFC2119] and - indicate requirement levels for compliant implementations. - Requirements apply to all implementations unless otherwise stated. - - An implementation is a software module that supports one of the media - types defined in this document. Software modules may support - multiple media types, but conformance is considered individually for - each type. - - Implementations that fail to satisfy one or more "MUST" requirements - are considered non-compliant. Implementations that satisfy all - "MUST" requirements, but fail to satisfy one or more "SHOULD" - requirements, are said to be "conditionally compliant". All other - implementations are "unconditionally compliant". - -4. Deployed Media Types and Compatibility - - The application/ogg media type has been used in an ad hoc fashion to - label and exchange multimedia content in Ogg containers. - - Use of the "application" top-level type for this kind of content is - known to be problematic, in particular since it obfuscates video and - audio content. This document thus defines the media types, - - o video/ogg - - o audio/ogg - - which are intended for common use and SHOULD be used when dealing - with video or audio content, respectively. This document also - obsoletes the [RFC3534] definition of application/ogg and marks it - for complex data (e.g., multitrack visual, audio, textual, and other - time-continuously sampled data), which is not clearly video or audio - data and thus not suited for either the video/ogg or audio/ogg types. - Refer to the following section for more details. - - An Ogg bitstream generally consists of one or more logical bitstreams - that each consist of a series of header and data pages packetising - time-continuous binary data [RFC3533]. The content types of the - logical bitstreams may be identified without decoding the header - pages of the logical bitstreams through use of a [Skeleton] - bitstream. Using Ogg Skeleton is REQUIRED for content served under - - - - - -Goncalves, et al. Standards Track [Page 3] - -RFC 5334 Ogg Media Types September 2008 - - - the application/ogg type and RECOMMENDED for video/ogg and audio/ogg, - as Skeleton contains identifiers to describe the different - encapsulated data. - - Furthermore, it is RECOMMENDED that implementations that identify a - logical bitstream that they cannot decode SHOULD ignore it, while - continuing to decode the ones they can. Such precaution ensures - backward and forward compatibility with existing and future data. - - These media types can optionally use the "codecs" parameter described - in [RFC4281]. Codecs encapsulated in Ogg require a text identifier - at the beginning of the first header page, hence a machine-readable - method to identify the encapsulated codecs would be through this - header. The following table illustrates how those header values map - into strings that are used in the "codecs" parameter when dealing - with Ogg media types. - - Codec Identifier | Codecs Parameter - ----------------------------------------------------------- - char[5]: 'BBCD\0' | dirac - char[5]: '\177FLAC' | flac - char[7]: '\x80theora' | theora - char[7]: '\x01vorbis' | vorbis - char[8]: 'CELT ' | celt - char[8]: 'CMML\0\0\0\0' | cmml - char[8]: '\213JNG\r\n\032\n' | jng - char[8]: '\x80kate\0\0\0' | kate - char[8]: 'OggMIDI\0' | midi - char[8]: '\212MNG\r\n\032\n' | mng - char[8]: 'PCM ' | pcm - char[8]: '\211PNG\r\n\032\n' | png - char[8]: 'Speex ' | speex - char[8]: 'YUV4MPEG' | yuv4mpeg - - An up-to-date version of this table is kept at Xiph.org (see - [Codecs]). - - Possible examples include: - - o application/ogg; codecs="theora, cmml, ecmascript" - - o video/ogg; codecs="theora, vorbis" - - o audio/ogg; codecs=speex - - - - - - - -Goncalves, et al. Standards Track [Page 4] - -RFC 5334 Ogg Media Types September 2008 - - -5. Relation between the Media Types - - As stated in the previous section, this document describes three - media types that are targeted at different data encapsulated in Ogg. - Since Ogg is capable of encapsulating any kind of data, the multiple - usage scenarios have revealed interoperability issues between - implementations when dealing with content served solely under the - application/ogg type. - - While this document does redefine the earlier definition of - application/ogg, this media type will continue to embrace the widest - net possible of content with the video/ogg and audio/ogg types being - smaller subsets of it. However, the video/ogg and audio/ogg types - take precedence in a subset of the usages, specifically when serving - multimedia content that is not complex enough to warrant the use of - application/ogg. Following this line of thought, the audio/ogg type - is an even smaller subset within video/ogg, as it is not intended to - refer to visual content. - - As such, the application/ogg type is the recommended choice to serve - content aimed at scientific and other applications that require - various multiplexed signals or streams of continuous data, with or - without scriptable control of content. For bitstreams containing - visual, timed text, and any other type of material that requires a - visual interface, but that is not complex enough to warrant serving - under application/ogg, the video/ogg type is recommended. In - situations where the Ogg bitstream predominantly contains audio data - (lyrics, metadata, or cover art notwithstanding), it is recommended - to use the audio/ogg type. - -6. Encoding Considerations - - Binary: The content consists of an unrestricted sequence of octets. - - Note: - - o Ogg encapsulated content is binary data and should be transmitted - in a suitable encoding without CR/LF conversion, 7-bit stripping, - etc.; base64 [RFC4648] is generally preferred for binary-to-text - encoding. - - o Media types described in this document are used for stream based - storage (such as files) and transport (such as TCP streams or - pipes); separate types are used to identify codecs such as in - real-time applications for the RTP payload formats of Theora - [ThRTP] video, Vorbis [RFC5215], or Speex [SpRTP] audio, as well - as for identification of encapsulated data within Ogg through - Skeleton. - - - -Goncalves, et al. Standards Track [Page 5] - -RFC 5334 Ogg Media Types September 2008 - - -7. Security Considerations - - Refer to [RFC3552] for a discussion of terminology used in this - section. - - The Ogg encapsulation format is a container and only a carrier of - content (such as audio, video, and displayable text data) with a very - rigid definition. This format in itself is not more vulnerable than - any other content framing mechanism. - - Ogg does not provide for any generic encryption or signing of itself - or its contained bitstreams. However, it encapsulates any kind of - binary content and is thus able to contain encrypted and signed - content data. It is also possible to add an external security - mechanism that encrypts or signs an Ogg bitstream and thus provides - content confidentiality and authenticity. - - As Ogg encapsulates binary data, it is possible to include executable - content in an Ogg bitstream. Implementations SHOULD NOT execute such - content without prior validation of its origin by the end-user. - - Issues may arise on applications that use Ogg for streaming or file - transfer in a networking scenario. In such cases, implementations - decoding Ogg and its encapsulated bitstreams have to ensure correct - handling of manipulated bitstreams, of buffer overflows, and similar - issues. - - It is also possible to author malicious Ogg bitstreams, which attempt - to call for an excessively large picture size, high sampling-rate - audio, etc. Implementations SHOULD protect themselves against this - kind of attack. - - Ogg has an extensible structure, so that it is theoretically possible - that metadata fields or media formats might be defined in the future - which might be used to induce particular actions on the part of the - recipient, thus presenting additional security risks. However, this - type of capability is currently not supported in the referenced - specification. - - Implementations may fail to implement a specific security model or - other means to prevent possibly dangerous operations. Such failure - might possibly be exploited to gain unauthorized access to a system - or sensitive information; such failure constitutes an unknown factor - and is thus considered out of the scope of this document. - - - - - - - -Goncalves, et al. Standards Track [Page 6] - -RFC 5334 Ogg Media Types September 2008 - - -8. Interoperability Considerations - - The Ogg container format is device-, platform-, and vendor-neutral - and has proved to be widely implementable across different computing - platforms through a wide range of encoders and decoders. A broadly - portable reference implementation [libogg] is available under the - revised (3-clause) BSD license, which is a Free Software license. - - The Xiph.Org Foundation has defined the specification, - interoperability, and conformance and conducts regular - interoperability testing. - - The use of the Ogg Skeleton extension has been confirmed to not cause - interoperability issues with existing implementations. Third parties - are, however, welcome to conduct their own testing. - -9. IANA Considerations - - In accordance with the procedures set forth in [RFC4288], this - document registers two new media types and redefines the existing - application/ogg as defined in the following section. - -10. Ogg Media Types - -10.1. application/ogg - - Type name: application - - Subtype name: ogg - - Required parameters: none - - Optional parameters: codecs, whose syntax is defined in RFC 4281. - See section 4 of RFC 5334 for a list of allowed values. - - Encoding considerations: See section 6 of RFC 5334. - - Security considerations: See section 7 of RFC 5334. - - Interoperability considerations: None, as noted in section 8 of RFC - 5334. - - Published specification: RFC 3533 - - Applications which use this media type: Scientific and otherwise that - require various multiplexed signals or streams of data, with or - without scriptable control of content. - - - - -Goncalves, et al. Standards Track [Page 7] - -RFC 5334 Ogg Media Types September 2008 - - - Additional information: - - Magic number(s): The first four bytes, 0x4f 0x67 0x67 0x53, - correspond to the string "OggS". - - File extension(s): .ogx - - RFC 3534 defined the file extension .ogg for application/ogg, - which RFC 5334 obsoletes in favor of .ogx due to concerns where, - historically, some implementations expect .ogg files to be solely - Vorbis-encoded audio. - - Macintosh File Type Code(s): OggX - - Person & Email address to contact for further information: See - "Authors' Addresses" section. - - Intended usage: COMMON - - Restrictions on usage: The type application/ogg SHOULD only be used - in situations where it is not appropriate to serve data under the - video/ogg or audio/ogg types. Data served under the application/ogg - type SHOULD use the .ogx file extension and MUST contain an Ogg - Skeleton logical bitstream to identify all other contained logical - bitstreams. - - Author: See "Authors' Addresses" section. - - Change controller: The Xiph.Org Foundation. - -10.2. video/ogg - - Type name: video - - Subtype name: ogg - - Required parameters: none - - Optional parameters: codecs, whose syntax is defined in RFC 4281. - See section 4 of RFC 5334 for a list of allowed values. - - Encoding considerations: See section 6 of RFC 5334. - - Security considerations: See section 7 of RFC 5334. - - Interoperability considerations: None, as noted in section 8 of RFC - 5334. - - - - -Goncalves, et al. Standards Track [Page 8] - -RFC 5334 Ogg Media Types September 2008 - - - Published specification: RFC 3533 - - Applications which use this media type: Multimedia applications, - including embedded, streaming, and conferencing tools. - - Additional information: - - Magic number(s): The first four bytes, 0x4f 0x67 0x67 0x53, - correspond to the string "OggS". - - File extension(s): .ogv - - Macintosh File Type Code(s): OggV - - Person & Email address to contact for further information: See - "Authors' Addresses" section. - - Intended usage: COMMON - - Restrictions on usage: The type "video/ogg" SHOULD be used for Ogg - bitstreams containing visual, audio, timed text, or any other type of - material that requires a visual interface. It is intended for - content not complex enough to warrant serving under "application/ - ogg"; for example, a combination of Theora video, Vorbis audio, - Skeleton metadata, and CMML captioning. Data served under the type - "video/ogg" SHOULD contain an Ogg Skeleton logical bitstream. - Implementations interacting with the type "video/ogg" SHOULD support - multiplexed bitstreams. - - Author: See "Authors' Addresses" section. - - Change controller: The Xiph.Org Foundation. - -10.3. audio/ogg - - Type name: audio - - Subtype name: ogg - - Required parameters: none - - Optional parameters: codecs, whose syntax is defined in RFC 4281. - See section 4 of RFC 5334 for a list of allowed values. - - Encoding considerations: See section 6 of RFC 5334. - - Security considerations: See section 7 of RFC 5334. - - - - -Goncalves, et al. Standards Track [Page 9] - -RFC 5334 Ogg Media Types September 2008 - - - Interoperability considerations: None, as noted in section 8 of RFC - 5334. - - Published specification: RFC 3533 - - Applications which use this media type: Multimedia applications, - including embedded, streaming, and conferencing tools. - - Additional information: - - Magic number(s): The first four bytes, 0x4f 0x67 0x67 0x53, - correspond to the string "OggS". - - File extension(s): .oga, .ogg, .spx - - Macintosh File Type Code(s): OggA - - Person & Email address to contact for further information: See - "Authors' Addresses" section. - - Intended usage: COMMON - - Restrictions on usage: The type "audio/ogg" SHOULD be used when the - Ogg bitstream predominantly contains audio data. Content served - under the "audio/ogg" type SHOULD have an Ogg Skeleton logical - bitstream when using the default .oga file extension. The .ogg and - .spx file extensions indicate a specialization that requires no - Skeleton due to backward compatibility concerns with existing - implementations. In particular, .ogg is used for Ogg files that - contain only a Vorbis bitstream, while .spx is used for Ogg files - that contain only a Speex bitstream. - - Author: See "Authors' Addresses" section. - - Change controller: The Xiph.Org Foundation. - -11. Acknowledgements - - The authors gratefully acknowledge the contributions of Magnus - Westerlund, Alfred Hoenes, and Peter Saint-Andre. - -12. Copying Conditions - - The authors agree to grant third parties the irrevocable right to - copy, use and distribute the work, with or without modification, in - any medium, without royalty, provided that, unless separate - permission is granted, redistributed modified works do not contain - misleading author, version, name of work, or endorsement information. - - - -Goncalves, et al. Standards Track [Page 10] - -RFC 5334 Ogg Media Types September 2008 - - -13. References - -13.1. Normative References - - [RFC2045] Freed, N. and N. Borenstein, "Multipurpose Internet Mail - Extensions (MIME) Part One: Format of Internet Message - Bodies", RFC 2045, November 1996. - - [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate - Requirement Levels", BCP 14, RFC 2119, March 1997. - - [RFC3533] Pfeiffer, S., "The Ogg Encapsulation Format Version 0", - RFC 3533, May 2003. - - [RFC4281] Gellens, R., Singer, D., and P. Frojdh, "The Codecs - Parameter for "Bucket" Media Types", RFC 4281, - November 2005. - - [RFC4288] Freed, N. and J. Klensin, "Media Type Specifications and - Registration Procedures", BCP 13, RFC 4288, - December 2005. - -13.2. Informative References - - [CMML] Pfeiffer, S., Parker, C., and A. Pang, "The Continuous - Media Markup Language (CMML)", Work in Progress, - March 2006. - - [Codecs] Pfeiffer, S. and I. Goncalves, "Specification of MIME - types and respective codecs parameter", July 2008, - . - - [Dirac] Dirac Group, "Dirac Specification", - . - - [FLAC] Coalson, J., "The FLAC Format", - . - - [libogg] Xiph.Org Foundation, "The libogg API", June 2000, - . - - [Ogg] Xiph.Org Foundation, "Ogg bitstream documentation: Ogg - logical and physical bitstream overview, Ogg logical - bitstream framing, Ogg multi-stream multiplexing", - . - - [RFC3534] Walleij, L., "The application/ogg Media Type", RFC 3534, - May 2003. - - - -Goncalves, et al. Standards Track [Page 11] - -RFC 5334 Ogg Media Types September 2008 - - - [RFC3552] Rescorla, E. and B. Korver, "Guidelines for Writing RFC - Text on Security Considerations", BCP 72, RFC 3552, - July 2003. - - [RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data - Encodings", RFC 4648, October 2006. - - [RFC5215] Barbato, L., "RTP Payload Format for Vorbis Encoded - Audio", RFC 5215, August 2008. - - [Skeleton] Pfeiffer, S. and C. Parker, "The Ogg Skeleton Metadata - Bitstream", November 2007, - . - - [Speex] Valin, J., "The Speex Codec Manual", February 2002, - . - - [SpRTP] Herlein, G., Valin, J., Heggestad, A., and A. Moizard, - "RTP Payload Format for the Speex Codec", Work - in Progress, February 2008. - - [Theora] Xiph.Org Foundation, "Theora Specification", - October 2007, . - - [ThRTP] Barbato, L., "RTP Payload Format for Theora Encoded - Video", Work in Progress, June 2006. - - [Vorbis] Xiph.Org Foundation, "Vorbis I Specification", July 2004, - . - - - - - - - - - - - - - - - - - - - - - - -Goncalves, et al. Standards Track [Page 12] - -RFC 5334 Ogg Media Types September 2008 - - -Authors' Addresses - - Ivo Emanuel Goncalves - Xiph.Org Foundation - 21 College Hill Road - Somerville, MA 02144 - US - - EMail: justivo@gmail.com - URI: xmpp:justivo@gmail.com - - - Silvia Pfeiffer - Xiph.Org Foundation - - EMail: silvia@annodex.net - URI: http://annodex.net/ - - - Christopher Montgomery - Xiph.Org Foundation - - EMail: monty@xiph.org - URI: http://xiph.org - - - - - - - - - - - - - - - - - - - - - - - - - - - -Goncalves, et al. Standards Track [Page 13] - -RFC 5334 Ogg Media Types September 2008 - - -Full Copyright Statement - - Copyright (C) The IETF Trust (2008). - - This document is subject to the rights, licenses and restrictions - contained in BCP 78, and except as set forth therein, the authors - retain all their rights. - - This document and the information contained herein are provided on an - "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS - OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND - THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS - OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF - THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED - WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. - -Intellectual Property - - The IETF takes no position regarding the validity or scope of any - Intellectual Property Rights or other rights that might be claimed to - pertain to the implementation or use of the technology described in - this document or the extent to which any license under such rights - might or might not be available; nor does it represent that it has - made any independent effort to identify any such rights. Information - on the procedures with respect to rights in RFC documents can be - found in BCP 78 and BCP 79. - - Copies of IPR disclosures made to the IETF Secretariat and any - assurances of licenses to be made available, or the result of an - attempt made to obtain a general license or permission for the use of - such proprietary rights by implementers or users of this - specification can be obtained from the IETF on-line IPR repository at - http://www.ietf.org/ipr. - - The IETF invites any interested party to bring to its attention any - copyrights, patents or patent applications, or other proprietary - rights that may cover technology that may be required to implement - this standard. Please address the information to the IETF at - ietf-ipr@ietf.org. - - - - - - - - - - - - -Goncalves, et al. Standards Track [Page 14] - diff --git a/ExternalLibs/libogg-1.2.0/doc/skeleton.html b/ExternalLibs/libogg-1.2.0/doc/skeleton.html deleted file mode 100644 index 8b29c18..0000000 --- a/ExternalLibs/libogg-1.2.0/doc/skeleton.html +++ /dev/null @@ -1,222 +0,0 @@ - - - - - -The Ogg Skeleton Metadata Bitstream - - - - - - - - - -

    The Ogg Skeleton Metadata Bitstream

    - -

    Overview

    - -

    Ogg Skeleton provides structuring information for multitrack Ogg files. It is compatible with Ogg Theora and provides extra clues for synchronization and content negotiation such as language selection.

    - -

    Ogg is a generic container format for time-continuous data streams, enabling interleaving of several tracks of frame-wise encoded content in a time-multiplexed manner. As an example, an Ogg physical bitstream could encapsulate several tracks of video encoded in Theora and multiple tracks of audio encoded in Speex or Vorbis or FLAC at the same time. A player that decodes such a bitstream could then, for example, play one video channel as the main video playback, alpha-blend another one on top of it (e.g. a caption track), play a main Vorbis audio together with several FLAC audio tracks simultaneously (e.g. as sound effects), and provide a choice of Speex channels (e.g. providing commentary in different languages). Such a file is generally possible to create with Ogg, it is however not possible to generically parse such a file, seek on it, understand what codecs are contained in such a file, and dynamically handle and play back such content.

    - -

    Ogg does not know anything about the content it carries and leaves it to the media mapping of each codec to declare and describe itself. There is no meta information available at the Ogg level about the content tracks encapsulated within an Ogg physical bitstream. This is particularly a problem if you don't have all the decoder libraries available and just want to parse an Ogg file to find out what type of data it encapsulates (such as the "file" command under *nix to determine what file it is through magic numbers), or want to seek to a temporal offset without having to decode the data (such as on a Web server that just serves out Ogg files and parts thereof).

    - -

    Ogg Skeleton is being designed to overcome these problems. Ogg Skeleton is a logical bitstream within an Ogg stream that contains information about the other encapsulated logical bitstreams. For each logical bitstream it provides information such as its media type, and explains the way the granulepos field in Ogg pages is mapped to time.

    - -

    Ogg Skeleton is also designed to allow the creation of substreams from Ogg physical bitstreams that retain the original timing information. For example, when cutting out the segment between the 7th and the 59th second of an Ogg file, it would be nice to continue to start this cut out file with a playback time of 7 seconds and not of 0. This is of particular interest if you're streaming this file from a Web server after a query for a temporal subpart such as in http://example.com/video.ogv?t=7-59

    - -

    Specification

    - -

    How to describe the logical bitstreams within an Ogg container?

    - -

    The following information about a logical bitstream is of interest to contain as meta information in the Skeleton:

    -
      -
    • the serial number: it identifies a content track
      • -
    • the mime type: it identifies the content type
      • -
    • other generic name-value fields that can provide meta information such as the language of a track or the video height and width
      • -
    • the number of header packets: this informs a parser about the number of actual header packets in an Ogg logical bitstream
      • -
    • the granule rate: the granule rate represents the data rate in Hz at which content is sampled for the particular logical bitstream, allowing to map a granule position to time by calculating "granulepos / granulerate"
      • -
    • the preroll: the number of past content packets to take into account when decoding the current Ogg page, which is necessary for seeking (vorbis has generally 2, speex 3)
      • -
    • the granuleshift: the number of lower bits from the granulepos field that are used to provide position information for sub-seekable units (like the keyframe shift in theora)
      • -
    • a basetime: it provides a mapping for granule position 0 (for all logical bitstreams) to a playback time; an example use: most content in professional analog video creation actually starts at a time of 1 hour and thus adding this additional field allows them retain this mapping on digitizing their content
      • -
    • a UTC time: it provides a mapping for granule position 0 (for all logical bitstreams) to a real-world clock time allowing to remember e.g. the recording or broadcast time of some content
      • -
    - -

    How to allow the creation of substreams from an Ogg physical bitstream?

    - -

    When cutting out a subpart of an Ogg physical bitstream, the aim is to keep all the content pages intact (including the framing and granule positions) and just change some information in the Skeleton that allows reconstruction of the accurate time mapping. When remultiplexing such a bitstream, it is necessary to take into account all the different contained logical bitstreams. A given cut-in time maps to several different byte positions in the Ogg physical bitstream because each logical bitstream has its relevant information for that time at a different location. In addition, the resolution of each logical bitstream may not be high enough to accommodate for the given cut-in time and thus there may be some surplus information necessary to be remuxed into the new bitstream.

    - -

    The following information is necessary to be added to the Skeleton to allow a correct presentation of a subpart of an Ogg bitstream:

    -
      -
    • the presentation time: this is the actual cut-in time and all logical bitstreams are meant to start presenting from this time onwards, not from the time their data starts, which may be some time before that (because this time may have mapped right into the middle of a packet, or because the logical bitstream has a preroll or a keyframe shift)
      • -
    • the basegranule: this represents the granule number with which this logical bitstream starts in the remuxed stream and provides for each logical bitstream the accurate start time of its data stream; this information is necessary to allow correct decoding and timing of the first data packets contained in a logcial bitstream of a remuxed Ogg stream
      • -
    - -

    Ogg Skeleton version 3.0 Format Specification

    - -

    Adding the above information into an Ogg bitstream without breaking existing Ogg functionality and code requires the use of a logical bitstream for Ogg Skeleton. This logical bitstream may be ignored on decoding such that existing players can still continue to play back Ogg files that have a Skeleton bitstream. Skeleton enriches the Ogg bitstream to provide meta information about structure and content of the Ogg bitstream.

    - -

    The Skeleton logical bitstream starts with an ident header that contains information about all of the logical bitstreams and is mapped into the Skeleton bos page. The first 8 bytes provide the magic identifier "fishead\0". -After the fishead follows a set of secondary header packets, each of which contains information about one logical bitstream. These secondary header packets are identified by an 8 byte code of "fisbone\0". The Skeleton logical bitstream has no actual content packets. Its eos page is included into the stream before any data pages of the other logical bitstreams appear and contains a packet of length 0.

    - -

    The fishead ident header looks as follows:

    -
    -
-  0                   1                   2                   3
-  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1| Byte
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Identifier 'fishead\0'                                        | 0-3
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 4-7
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Version major                 | Version minor                 | 8-11
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Presentationtime numerator                                    | 12-15
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 16-19
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Presentationtime denominator                                  | 20-23
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 24-27
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Basetime numerator                                            | 28-31
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 32-35
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Basetime denominator                                          | 36-39
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 40-43
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | UTC                                                           | 44-47
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 48-51
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 52-55
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 56-59
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 60-63
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-
    -

    The version fields provide version information for the Skeleton track, currently being 3.0 (the number having evolved within the Annodex project).

    - -

    Presentation time and basetime are specified as a rational number, the denominator providing the temporal resolution at which the time is given (e.g. to specify time in milliseconds, provide a denominator of 1000).

    - -

    The fisbone secondary header packet looks as follows:

    -
    -
-  0                   1                   2                   3
-  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1| Byte
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Identifier 'fisbone\0'                                        | 0-3
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 4-7
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Offset to message header fields                               | 8-11
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Serial number                                                 | 12-15
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Number of header packets                                      | 16-19
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Granulerate numerator                                         | 20-23
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 24-27
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Granulerate denominator                                       | 28-31
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 32-35
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Basegranule                                                   | 36-39
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- |                                                               | 40-43
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Preroll                                                       | 44-47
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Granuleshift  | Padding/future use                            | 48-51
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- | Message header fields ...                                     | 52-
- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-
-
    -

    The mime type is provided as a message header field specified in the same way that HTTP header fields are given (e.g. "Content-Type: audio/vorbis"). Further meta information (such as language and screen size) are also included as message header fields. The offset to the message header fields at the beginning of a fisbone packet is included for forward compatibility - to allow further fields to be included into the packet without disrupting the message header field parsing.

    - -

    The granule rate is again given as a rational number in the same way that presentation time and basetime were provided above.

    - -

    A further restriction on how to encapsulate Skeleton into Ogg is proposed to allow for easier parsing:

    -
      -
    • there can only be one Skeleton logical bitstream in a Ogg bitstream
      • -
    • the Skeleton bos page is the very first bos page in the Ogg stream such that it can be identified straight away and decoders don't get confused about it being e.g. Ogg Vorbis without this meta information
      • -
    • the bos pages of all the other logical bistreams come next (a requirement of Ogg)
      • -
    • the secondary header pages of all logical bitstreams come next, including Skeleton's secondary header packets
      • -
    • the Skeleton eos page end the control section of the Ogg stream before any content pages of any of the other logical bitstreams appear
      • -
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This is $PACKAGE $VERSION, but the -$progname: definition of this LT_INIT comes from an older release. -$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION -$progname: and run autoconf again. -_LT_EOF - else - cat >&2 <<_LT_EOF -$progname: Version mismatch error. This is $PACKAGE $VERSION, but the -$progname: definition of this LT_INIT comes from $PACKAGE $macro_version. -$progname: You should recreate aclocal.m4 with macros from $PACKAGE $VERSION -$progname: and run autoconf again. -_LT_EOF - fi - else - cat >&2 <<_LT_EOF -$progname: Version mismatch error. This is $PACKAGE $VERSION, revision $package_revision, -$progname: but the definition of this LT_INIT comes from revision $macro_revision. -$progname: You should recreate aclocal.m4 with macros from revision $package_revision -$progname: of $PACKAGE $VERSION and run autoconf again. -_LT_EOF - fi - - exit $EXIT_MISMATCH - fi -} - - -## ----------- ## -## Main. ## -## ----------- ## - -$opt_help || { - # Sanity checks first: - func_check_version_match - - if test "$build_libtool_libs" != yes && test "$build_old_libs" != yes; then - func_fatal_configuration "not configured to build any kind of library" - fi - - test -z "$mode" && func_fatal_error "error: you must specify a MODE." - - - # Darwin sucks - eval std_shrext=\"$shrext_cmds\" - - - # Only execute mode is allowed to have -dlopen flags. - if test -n "$execute_dlfiles" && test "$mode" != execute; then - func_error "unrecognized option \`-dlopen'" - $ECHO "$help" 1>&2 - exit $EXIT_FAILURE - fi - - # Change the help message to a mode-specific one. - generic_help="$help" - help="Try \`$progname --help --mode=$mode' for more information." -} - - -# func_lalib_p file -# True iff FILE is a libtool `.la' library or `.lo' object file. -# This function is only a basic sanity check; it will hardly flush out -# determined imposters. -func_lalib_p () -{ - test -f "$1" && - $SED -e 4q "$1" 2>/dev/null \ - | $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1 -} - -# func_lalib_unsafe_p file -# True iff FILE is a libtool `.la' library or `.lo' object file. -# This function implements the same check as func_lalib_p without -# resorting to external programs. To this end, it redirects stdin and -# closes it afterwards, without saving the original file descriptor. -# As a safety measure, use it only where a negative result would be -# fatal anyway. Works if `file' does not exist. -func_lalib_unsafe_p () -{ - lalib_p=no - if test -f "$1" && test -r "$1" && exec 5<&0 <"$1"; then - for lalib_p_l in 1 2 3 4 - do - read lalib_p_line - case "$lalib_p_line" in - \#\ Generated\ by\ *$PACKAGE* ) lalib_p=yes; break;; - esac - done - exec 0<&5 5<&- - fi - test "$lalib_p" = yes -} - -# func_ltwrapper_script_p file -# True iff FILE is a libtool wrapper script -# This function is only a basic sanity check; it will hardly flush out -# determined imposters. -func_ltwrapper_script_p () -{ - func_lalib_p "$1" -} - -# func_ltwrapper_executable_p file -# True iff FILE is a libtool wrapper executable -# This function is only a basic sanity check; it will hardly flush out -# determined imposters. -func_ltwrapper_executable_p () -{ - func_ltwrapper_exec_suffix= - case $1 in - *.exe) ;; - *) func_ltwrapper_exec_suffix=.exe ;; - esac - $GREP "$magic_exe" "$1$func_ltwrapper_exec_suffix" >/dev/null 2>&1 -} - -# func_ltwrapper_scriptname file -# Assumes file is an ltwrapper_executable -# uses $file to determine the appropriate filename for a -# temporary ltwrapper_script. -func_ltwrapper_scriptname () -{ - func_ltwrapper_scriptname_result="" - if func_ltwrapper_executable_p "$1"; then - func_dirname_and_basename "$1" "" "." - func_stripname '' '.exe' "$func_basename_result" - func_ltwrapper_scriptname_result="$func_dirname_result/$objdir/${func_stripname_result}_ltshwrapper" - fi -} - -# func_ltwrapper_p file -# True iff FILE is a libtool wrapper script or wrapper executable -# This function is only a basic sanity check; it will hardly flush out -# determined imposters. -func_ltwrapper_p () -{ - func_ltwrapper_script_p "$1" || func_ltwrapper_executable_p "$1" -} - - -# func_execute_cmds commands fail_cmd -# Execute tilde-delimited COMMANDS. -# If FAIL_CMD is given, eval that upon failure. -# FAIL_CMD may read-access the current command in variable CMD! -func_execute_cmds () -{ - $opt_debug - save_ifs=$IFS; IFS='~' - for cmd in $1; do - IFS=$save_ifs - eval cmd=\"$cmd\" - func_show_eval "$cmd" "${2-:}" - done - IFS=$save_ifs -} - - -# func_source file -# Source FILE, adding directory component if necessary. -# Note that it is not necessary on cygwin/mingw to append a dot to -# FILE even if both FILE and FILE.exe exist: automatic-append-.exe -# behavior happens only for exec(3), not for open(2)! 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"./$1" ;; - esac -} - - -# func_infer_tag arg -# Infer tagged configuration to use if any are available and -# if one wasn't chosen via the "--tag" command line option. -# Only attempt this if the compiler in the base compile -# command doesn't match the default compiler. -# arg is usually of the form 'gcc ...' -func_infer_tag () -{ - $opt_debug - if test -n "$available_tags" && test -z "$tagname"; then - CC_quoted= - for arg in $CC; do - func_quote_for_eval "$arg" - CC_quoted="$CC_quoted $func_quote_for_eval_result" - done - case $@ in - # Blanks in the command may have been stripped by the calling shell, - # but not from the CC environment variable when configure was run. - " $CC "* | "$CC "* | " `$ECHO $CC` "* | "`$ECHO $CC` "* | " $CC_quoted"* | "$CC_quoted "* | " `$ECHO $CC_quoted` "* | "`$ECHO $CC_quoted` "*) ;; - # Blanks at the start of $base_compile will cause this to fail - # if we don't check for them as well. - *) - for z in $available_tags; do - if $GREP "^# ### BEGIN LIBTOOL TAG CONFIG: $z$" < "$progpath" > /dev/null; then - # Evaluate the configuration. - eval "`${SED} -n -e '/^# ### BEGIN LIBTOOL TAG CONFIG: '$z'$/,/^# ### END LIBTOOL TAG CONFIG: '$z'$/p' < $progpath`" - CC_quoted= - for arg in $CC; do - # Double-quote args containing other shell metacharacters. - func_quote_for_eval "$arg" - CC_quoted="$CC_quoted $func_quote_for_eval_result" - done - case "$@ " in - " $CC "* | "$CC "* | " `$ECHO $CC` "* | "`$ECHO $CC` "* | " $CC_quoted"* | "$CC_quoted "* | " `$ECHO $CC_quoted` "* | "`$ECHO $CC_quoted` "*) - # The compiler in the base compile command matches - # the one in the tagged configuration. - # Assume this is the tagged configuration we want. - tagname=$z - break - ;; - esac - fi - done - # If $tagname still isn't set, then no tagged configuration - # was found and let the user know that the "--tag" command - # line option must be used. - if test -z "$tagname"; then - func_echo "unable to infer tagged configuration" - func_fatal_error "specify a tag with \`--tag'" -# else -# func_verbose "using $tagname tagged configuration" - fi - ;; - esac - fi -} - - - -# func_write_libtool_object output_name pic_name nonpic_name -# Create a libtool object file (analogous to a ".la" file), -# but don't create it if we're doing a dry run. -func_write_libtool_object () -{ - write_libobj=${1} - if test "$build_libtool_libs" = yes; then - write_lobj=\'${2}\' - else - write_lobj=none - fi - - if test "$build_old_libs" = yes; then - write_oldobj=\'${3}\' - else - write_oldobj=none - fi - - $opt_dry_run || { - cat >${write_libobj}T <?"'"'"' &()|`$[]' \ - && func_warning "libobj name \`$libobj' may not contain shell special characters." - func_dirname_and_basename "$obj" "/" "" - objname="$func_basename_result" - xdir="$func_dirname_result" - lobj=${xdir}$objdir/$objname - - test -z "$base_compile" && \ - func_fatal_help "you must specify a compilation command" - - # Delete any leftover library objects. - if test "$build_old_libs" = yes; then - removelist="$obj $lobj $libobj ${libobj}T" - else - removelist="$lobj $libobj ${libobj}T" - fi - - # On Cygwin there's no "real" PIC flag so we must build both object types - case $host_os in - cygwin* | mingw* | pw32* | os2* | cegcc*) - pic_mode=default - ;; - esac - if test "$pic_mode" = no && test "$deplibs_check_method" != pass_all; then - # non-PIC code in shared libraries is not supported - pic_mode=default - fi - - # Calculate the filename of the output object if compiler does - # not support -o with -c - if test "$compiler_c_o" = no; then - output_obj=`$ECHO "X$srcfile" | $Xsed -e 's%^.*/%%' -e 's%\.[^.]*$%%'`.${objext} - lockfile="$output_obj.lock" - else - output_obj= - need_locks=no - lockfile= - fi - - # Lock this critical section if it is needed - # We use this script file to make the link, it avoids creating a new file - if test "$need_locks" = yes; then - until $opt_dry_run || ln "$progpath" "$lockfile" 2>/dev/null; do - func_echo "Waiting for $lockfile to be removed" - sleep 2 - done - elif test "$need_locks" = warn; then - if test -f "$lockfile"; then - $ECHO "\ -*** ERROR, $lockfile exists and contains: -`cat $lockfile 2>/dev/null` - -This indicates that another process is trying to use the same -temporary object file, and libtool could not work around it because -your compiler does not support \`-c' and \`-o' together. If you -repeat this compilation, it may succeed, by chance, but you had better -avoid parallel builds (make -j) in this platform, or get a better -compiler." - - $opt_dry_run || $RM $removelist - exit $EXIT_FAILURE - fi - removelist="$removelist $output_obj" - $ECHO "$srcfile" > "$lockfile" - fi - - $opt_dry_run || $RM $removelist - removelist="$removelist $lockfile" - trap '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' 1 2 15 - - if test -n "$fix_srcfile_path"; then - eval srcfile=\"$fix_srcfile_path\" - fi - func_quote_for_eval "$srcfile" - qsrcfile=$func_quote_for_eval_result - - # Only build a PIC object if we are building libtool libraries. - if test "$build_libtool_libs" = yes; then - # Without this assignment, base_compile gets emptied. - fbsd_hideous_sh_bug=$base_compile - - if test "$pic_mode" != no; then - command="$base_compile $qsrcfile $pic_flag" - else - # Don't build PIC code - command="$base_compile $qsrcfile" - fi - - func_mkdir_p "$xdir$objdir" - - if test -z "$output_obj"; then - # Place PIC objects in $objdir - command="$command -o $lobj" - fi - - func_show_eval_locale "$command" \ - 'test -n "$output_obj" && $RM $removelist; exit $EXIT_FAILURE' - - if test "$need_locks" = warn && - test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then - $ECHO "\ -*** ERROR, $lockfile contains: -`cat $lockfile 2>/dev/null` - -but it should contain: -$srcfile - -This indicates that another process is trying to use the same -temporary object file, and libtool could not work around it because -your compiler does not support \`-c' and \`-o' together. If you -repeat this compilation, it may succeed, by chance, but you had better -avoid parallel builds (make -j) in this platform, or get a better -compiler." - - $opt_dry_run || $RM $removelist - exit $EXIT_FAILURE - fi - - # Just move the object if needed, then go on to compile the next one - if test -n "$output_obj" && test "X$output_obj" != "X$lobj"; then - func_show_eval '$MV "$output_obj" "$lobj"' \ - 'error=$?; $opt_dry_run || $RM $removelist; exit $error' - fi - - # Allow error messages only from the first compilation. - if test "$suppress_opt" = yes; then - suppress_output=' >/dev/null 2>&1' - fi - fi - - # Only build a position-dependent object if we build old libraries. - if test "$build_old_libs" = yes; then - if test "$pic_mode" != yes; then - # Don't build PIC code - command="$base_compile $qsrcfile$pie_flag" - else - command="$base_compile $qsrcfile $pic_flag" - fi - if test "$compiler_c_o" = yes; then - command="$command -o $obj" - fi - - # Suppress compiler output if we already did a PIC compilation. - command="$command$suppress_output" - func_show_eval_locale "$command" \ - '$opt_dry_run || $RM $removelist; exit $EXIT_FAILURE' - - if test "$need_locks" = warn && - test "X`cat $lockfile 2>/dev/null`" != "X$srcfile"; then - $ECHO "\ -*** ERROR, $lockfile contains: -`cat $lockfile 2>/dev/null` - -but it should contain: -$srcfile - -This indicates that another process is trying to use the same -temporary object file, and libtool could not work around it because -your compiler does not support \`-c' and \`-o' together. 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- *.exe:*) - destfile=$destfile.exe - ;; - *:*.exe) - func_stripname '' '.exe' "$destfile" - destfile=$func_stripname_result - ;; - esac - ;; - esac - func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?' - $opt_dry_run || if test -n "$outputname"; then - ${RM}r "$tmpdir" - fi - ;; - esac - done - - for file in $staticlibs; do - func_basename "$file" - name="$func_basename_result" - - # Set up the ranlib parameters. - oldlib="$destdir/$name" - - func_show_eval "$install_prog \$file \$oldlib" 'exit $?' - - if test -n "$stripme" && test -n "$old_striplib"; then - func_show_eval "$old_striplib $oldlib" 'exit $?' - fi - - # Do each command in the postinstall commands. - func_execute_cmds "$old_postinstall_cmds" 'exit $?' - done - - test -n "$future_libdirs" && \ - func_warning "remember to run \`$progname --finish$future_libdirs'" - - if test -n "$current_libdirs"; then - # Maybe just do a dry run. - $opt_dry_run && current_libdirs=" -n$current_libdirs" - exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs' - else - exit $EXIT_SUCCESS - fi -} - -test "$mode" = install && func_mode_install ${1+"$@"} - - -# func_generate_dlsyms outputname originator pic_p -# Extract symbols from dlprefiles and create ${outputname}S.o with -# a dlpreopen symbol table. -func_generate_dlsyms () -{ - $opt_debug - my_outputname="$1" - my_originator="$2" - my_pic_p="${3-no}" - my_prefix=`$ECHO "$my_originator" | sed 's%[^a-zA-Z0-9]%_%g'` - my_dlsyms= - - if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then - if test -n "$NM" && test -n "$global_symbol_pipe"; then - my_dlsyms="${my_outputname}S.c" - else - func_error "not configured to extract global symbols from dlpreopened files" - fi - fi - - if test -n "$my_dlsyms"; then - case $my_dlsyms in - "") ;; - *.c) - # Discover the nlist of each of the dlfiles. - nlist="$output_objdir/${my_outputname}.nm" - - func_show_eval "$RM $nlist ${nlist}S ${nlist}T" - - # Parse the name list into a source file. - func_verbose "creating $output_objdir/$my_dlsyms" - - $opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\ -/* $my_dlsyms - symbol resolution table for \`$my_outputname' dlsym emulation. */ -/* Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION */ - -#ifdef __cplusplus -extern \"C\" { -#endif - -/* External symbol declarations for the compiler. */\ -" - - if test "$dlself" = yes; then - func_verbose "generating symbol list for \`$output'" - - $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist" - - # Add our own program objects to the symbol list. - progfiles=`$ECHO "X$objs$old_deplibs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP` - for progfile in $progfiles; do - func_verbose "extracting global C symbols from \`$progfile'" - $opt_dry_run || eval "$NM $progfile | $global_symbol_pipe >> '$nlist'" - done - - if test -n "$exclude_expsyms"; then - $opt_dry_run || { - eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - if test -n "$export_symbols_regex"; then - $opt_dry_run || { - eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - # Prepare the list of exported symbols - if test -z "$export_symbols"; then - export_symbols="$output_objdir/$outputname.exp" - $opt_dry_run || { - $RM $export_symbols - eval "${SED} -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"' - case $host in - *cygwin* | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"' - ;; - esac - } - else - $opt_dry_run || { - eval "${SED} -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"' - eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - case $host in - *cygwin | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$nlist" >> "$output_objdir/$outputname.def"' - ;; - esac - } - fi - fi - - for dlprefile in $dlprefiles; do - func_verbose "extracting global C symbols from \`$dlprefile'" - func_basename "$dlprefile" - name="$func_basename_result" - $opt_dry_run || { - eval '$ECHO ": $name " >> "$nlist"' - eval "$NM $dlprefile 2>/dev/null | $global_symbol_pipe >> '$nlist'" - } - done - - $opt_dry_run || { - # Make sure we have at least an empty file. - test -f "$nlist" || : > "$nlist" - - if test -n "$exclude_expsyms"; then - $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T - $MV "$nlist"T "$nlist" - fi - - # Try sorting and uniquifying the output. - if $GREP -v "^: " < "$nlist" | - if sort -k 3 /dev/null 2>&1; then - sort -k 3 - else - sort +2 - fi | - uniq > "$nlist"S; then - : - else - $GREP -v "^: " < "$nlist" > "$nlist"S - fi - - if test -f "$nlist"S; then - eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"' - else - $ECHO '/* NONE */' >> "$output_objdir/$my_dlsyms" - fi - - $ECHO >> "$output_objdir/$my_dlsyms" "\ - -/* The mapping between symbol names and symbols. */ -typedef struct { - const char *name; - void *address; -} lt_dlsymlist; -" - case $host in - *cygwin* | *mingw* | *cegcc* ) - $ECHO >> "$output_objdir/$my_dlsyms" "\ -/* DATA imports from DLLs on WIN32 con't be const, because - runtime relocations are performed -- see ld's documentation - on pseudo-relocs. */" - lt_dlsym_const= ;; - *osf5*) - echo >> "$output_objdir/$my_dlsyms" "\ -/* This system does not cope well with relocations in const data */" - lt_dlsym_const= ;; - *) - lt_dlsym_const=const ;; - esac - - $ECHO >> "$output_objdir/$my_dlsyms" "\ -extern $lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[]; -$lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[] = -{\ - { \"$my_originator\", (void *) 0 }," - - case $need_lib_prefix in - no) - eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - *) - eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - esac - $ECHO >> "$output_objdir/$my_dlsyms" "\ - {0, (void *) 0} -}; - -/* This works around a problem in FreeBSD linker */ -#ifdef FREEBSD_WORKAROUND -static const void *lt_preloaded_setup() { - return lt_${my_prefix}_LTX_preloaded_symbols; -} -#endif - -#ifdef __cplusplus -} -#endif\ -" - } # !$opt_dry_run - - pic_flag_for_symtable= - case "$compile_command " in - *" -static "*) ;; - *) - case $host in - # compiling the symbol table file with pic_flag works around - # a FreeBSD bug that causes programs to crash when -lm is - # linked before any other PIC object. But we must not use - # pic_flag when linking with -static. The problem exists in - # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1. - *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*) - pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;; - *-*-hpux*) - pic_flag_for_symtable=" $pic_flag" ;; - *) - if test "X$my_pic_p" != Xno; then - pic_flag_for_symtable=" $pic_flag" - fi - ;; - esac - ;; - esac - symtab_cflags= - for arg in $LTCFLAGS; do - case $arg in - -pie | -fpie | -fPIE) ;; - *) symtab_cflags="$symtab_cflags $arg" ;; - esac - done - - # Now compile the dynamic symbol file. - func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?' - - # Clean up the generated files. - func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T"' - - # Transform the symbol file into the correct name. - symfileobj="$output_objdir/${my_outputname}S.$objext" - case $host in - *cygwin* | *mingw* | *cegcc* ) - if test -f "$output_objdir/$my_outputname.def"; then - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - else - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - fi - ;; - *) - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - ;; - esac - ;; - *) - func_fatal_error "unknown suffix for \`$my_dlsyms'" - ;; - esac - else - # We keep going just in case the user didn't refer to - # lt_preloaded_symbols. The linker will fail if global_symbol_pipe - # really was required. - - # Nullify the symbol file. - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"` - fi -} - -# func_win32_libid arg -# return the library type of file 'arg' -# -# Need a lot of goo to handle *both* DLLs and import libs -# Has to be a shell function in order to 'eat' the argument -# that is supplied when $file_magic_command is called. -func_win32_libid () -{ - $opt_debug - win32_libid_type="unknown" - win32_fileres=`file -L $1 2>/dev/null` - case $win32_fileres in - *ar\ archive\ import\ library*) # definitely import - win32_libid_type="x86 archive import" - ;; - *ar\ archive*) # could be an import, or static - if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | - $EGREP 'file format pe-i386(.*architecture: i386)?' >/dev/null ; then - win32_nmres=`eval $NM -f posix -A $1 | - $SED -n -e ' - 1,100{ - / I /{ - s,.*,import, - p - q - } - }'` - case $win32_nmres in - import*) win32_libid_type="x86 archive import";; - *) win32_libid_type="x86 archive static";; - esac - fi - ;; - *DLL*) - win32_libid_type="x86 DLL" - ;; - *executable*) # but shell scripts are "executable" too... - case $win32_fileres in - *MS\ Windows\ PE\ Intel*) - win32_libid_type="x86 DLL" - ;; - esac - ;; - esac - $ECHO "$win32_libid_type" -} - - - -# func_extract_an_archive dir oldlib -func_extract_an_archive () -{ - $opt_debug - f_ex_an_ar_dir="$1"; shift - f_ex_an_ar_oldlib="$1" - func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" 'exit $?' - if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then - : - else - func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib" - fi -} - - -# func_extract_archives gentop oldlib ... -func_extract_archives () -{ - $opt_debug - my_gentop="$1"; shift - my_oldlibs=${1+"$@"} - my_oldobjs="" - my_xlib="" - my_xabs="" - my_xdir="" - - for my_xlib in $my_oldlibs; do - # Extract the objects. - case $my_xlib in - [\\/]* | [A-Za-z]:[\\/]*) my_xabs="$my_xlib" ;; - *) my_xabs=`pwd`"/$my_xlib" ;; - esac - func_basename "$my_xlib" - my_xlib="$func_basename_result" - my_xlib_u=$my_xlib - while :; do - case " $extracted_archives " in - *" $my_xlib_u "*) - func_arith $extracted_serial + 1 - extracted_serial=$func_arith_result - my_xlib_u=lt$extracted_serial-$my_xlib ;; - *) break ;; - esac - done - extracted_archives="$extracted_archives $my_xlib_u" - my_xdir="$my_gentop/$my_xlib_u" - - func_mkdir_p "$my_xdir" - - case $host in - *-darwin*) - func_verbose "Extracting $my_xabs" - # Do not bother doing anything if just a dry run - $opt_dry_run || { - darwin_orig_dir=`pwd` - cd $my_xdir || exit $? - darwin_archive=$my_xabs - darwin_curdir=`pwd` - darwin_base_archive=`basename "$darwin_archive"` - darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true` - if test -n "$darwin_arches"; then - darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'` - darwin_arch= - func_verbose "$darwin_base_archive has multiple architectures $darwin_arches" - for darwin_arch in $darwin_arches ; do - func_mkdir_p "unfat-$$/${darwin_base_archive}-${darwin_arch}" - $LIPO -thin $darwin_arch -output "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" "${darwin_archive}" - cd "unfat-$$/${darwin_base_archive}-${darwin_arch}" - func_extract_an_archive "`pwd`" "${darwin_base_archive}" - cd "$darwin_curdir" - $RM "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" - done # $darwin_arches - ## Okay now we've a bunch of thin objects, gotta fatten them up :) - darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$basename" | sort -u` - darwin_file= - darwin_files= - for darwin_file in $darwin_filelist; do - darwin_files=`find unfat-$$ -name $darwin_file -print | $NL2SP` - $LIPO -create -output "$darwin_file" $darwin_files - done # $darwin_filelist - $RM -rf unfat-$$ - cd "$darwin_orig_dir" - else - cd $darwin_orig_dir - func_extract_an_archive "$my_xdir" "$my_xabs" - fi # $darwin_arches - } # !$opt_dry_run - ;; - *) - func_extract_an_archive "$my_xdir" "$my_xabs" - ;; - esac - my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | $NL2SP` - done - - func_extract_archives_result="$my_oldobjs" -} - - - -# func_emit_wrapper_part1 [arg=no] -# -# Emit the first part of a libtool wrapper script on stdout. -# For more information, see the description associated with -# func_emit_wrapper(), below. -func_emit_wrapper_part1 () -{ - func_emit_wrapper_part1_arg1=no - if test -n "$1" ; then - func_emit_wrapper_part1_arg1=$1 - fi - - $ECHO "\ -#! $SHELL - -# $output - temporary wrapper script for $objdir/$outputname -# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION -# -# The $output program cannot be directly executed until all the libtool -# libraries that it depends on are installed. -# -# This wrapper script should never be moved out of the build directory. -# If it is, it will not operate correctly. - -# Sed substitution that helps us do robust quoting. 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Disable this feature. - alias -g '\${1+\"\$@\"}'='\"\$@\"' - setopt NO_GLOB_SUBST -else - case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac -fi -BIN_SH=xpg4; export BIN_SH # for Tru64 -DUALCASE=1; export DUALCASE # for MKS sh - -# The HP-UX ksh and POSIX shell print the target directory to stdout -# if CDPATH is set. -(unset CDPATH) >/dev/null 2>&1 && unset CDPATH - -relink_command=\"$relink_command\" - -# This environment variable determines our operation mode. -if test \"\$libtool_install_magic\" = \"$magic\"; then - # install mode needs the following variables: - generated_by_libtool_version='$macro_version' - notinst_deplibs='$notinst_deplibs' -else - # When we are sourced in execute mode, \$file and \$ECHO are already set. - if test \"\$libtool_execute_magic\" != \"$magic\"; then - ECHO=\"$qecho\" - file=\"\$0\" - # Make sure echo works. - if test \"X\$1\" = X--no-reexec; then - # Discard the --no-reexec flag, and continue. - shift - elif test \"X\`{ \$ECHO '\t'; } 2>/dev/null\`\" = 'X\t'; then - # Yippee, \$ECHO works! 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Calling this function does no harm for other -# $host/$build combinations not listed above. -# -# ARG is the path (on $build) that should be converted to -# the proper representation for $host. The result is stored -# in $func_to_host_path_result. -func_to_host_path () -{ - func_to_host_path_result="$1" - if test -n "$1" ; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - case $build in - *mingw* ) # actually, msys - # awkward: cmd appends spaces to result - lt_sed_strip_trailing_spaces="s/[ ]*\$//" - func_to_host_path_tmp1=`( cmd //c echo "$1" |\ - $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""` - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_path_tmp1=`cygpath -w "$1"` - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # Unfortunately, winepath does not exit with a non-zero - # error code, so we are forced to check the contents of - # stdout. On the other hand, if the command is not - # found, the shell will set an exit code of 127 and print - # *an error message* to stdout. So we must check for both - # error code of zero AND non-empty stdout, which explains - # the odd construction: - func_to_host_path_tmp1=`winepath -w "$1" 2>/dev/null` - if test "$?" -eq 0 && test -n "${func_to_host_path_tmp1}"; then - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - else - # Allow warning below. - func_to_host_path_result="" - fi - ;; - esac - if test -z "$func_to_host_path_result" ; then - func_error "Could not determine host path corresponding to" - func_error " '$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback: - func_to_host_path_result="$1" - fi - ;; - esac - fi -} -# end: func_to_host_path - -# func_to_host_pathlist arg -# -# Convert pathlists to host format when used with build tools. -# See func_to_host_path(), above. This function supports the -# following $build/$host combinations (but does no harm for -# combinations not listed here): -# $build $host -# mingw (msys) mingw [e.g. native] -# cygwin mingw -# *nix + wine mingw -# -# Path separators are also converted from $build format to -# $host format. If ARG begins or ends with a path separator -# character, it is preserved (but converted to $host format) -# on output. -# -# ARG is a pathlist (on $build) that should be converted to -# the proper representation on $host. The result is stored -# in $func_to_host_pathlist_result. -func_to_host_pathlist () -{ - func_to_host_pathlist_result="$1" - if test -n "$1" ; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - # Remove leading and trailing path separator characters from - # ARG. msys behavior is inconsistent here, cygpath turns them - # into '.;' and ';.', and winepath ignores them completely. - func_to_host_pathlist_tmp2="$1" - # Once set for this call, this variable should not be - # reassigned. It is used in tha fallback case. - func_to_host_pathlist_tmp1=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e 's|^:*||' -e 's|:*$||'` - case $build in - *mingw* ) # Actually, msys. - # Awkward: cmd appends spaces to result. - lt_sed_strip_trailing_spaces="s/[ ]*\$//" - func_to_host_pathlist_tmp2=`( cmd //c echo "$func_to_host_pathlist_tmp1" |\ - $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""` - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_pathlist_tmp2=`cygpath -w -p "$func_to_host_pathlist_tmp1"` - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # unfortunately, winepath doesn't convert pathlists - func_to_host_pathlist_result="" - func_to_host_pathlist_oldIFS=$IFS - IFS=: - for func_to_host_pathlist_f in $func_to_host_pathlist_tmp1 ; do - IFS=$func_to_host_pathlist_oldIFS - if test -n "$func_to_host_pathlist_f" ; then - func_to_host_path "$func_to_host_pathlist_f" - if test -n "$func_to_host_path_result" ; then - if test -z "$func_to_host_pathlist_result" ; then - func_to_host_pathlist_result="$func_to_host_path_result" - else - func_to_host_pathlist_result="$func_to_host_pathlist_result;$func_to_host_path_result" - fi - fi - fi - IFS=: - done - IFS=$func_to_host_pathlist_oldIFS - ;; - esac - if test -z "$func_to_host_pathlist_result" ; then - func_error "Could not determine the host path(s) corresponding to" - func_error " '$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback. This may break if $1 contains DOS-style drive - # specifications. The fix is not to complicate the expression - # below, but for the user to provide a working wine installation - # with winepath so that path translation in the cross-to-mingw - # case works properly. - lt_replace_pathsep_nix_to_dos="s|:|;|g" - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp1" |\ - $SED -e "$lt_replace_pathsep_nix_to_dos"` - fi - # Now, add the leading and trailing path separators back - case "$1" in - :* ) func_to_host_pathlist_result=";$func_to_host_pathlist_result" - ;; - esac - case "$1" in - *: ) func_to_host_pathlist_result="$func_to_host_pathlist_result;" - ;; - esac - ;; - esac - fi -} -# end: func_to_host_pathlist - -# func_emit_cwrapperexe_src -# emit the source code for a wrapper executable on stdout -# Must ONLY be called from within func_mode_link because -# it depends on a number of variable set therein. -func_emit_cwrapperexe_src () -{ - cat < -#include -#ifdef _MSC_VER -# include -# include -# include -# define setmode _setmode -#else -# include -# include -# ifdef __CYGWIN__ -# include -# define HAVE_SETENV -# ifdef __STRICT_ANSI__ -char *realpath (const char *, char *); -int putenv (char *); -int setenv (const char *, const char *, int); -# endif -# endif -#endif -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(PATH_MAX) -# define LT_PATHMAX PATH_MAX -#elif defined(MAXPATHLEN) -# define LT_PATHMAX MAXPATHLEN -#else -# define LT_PATHMAX 1024 -#endif - -#ifndef S_IXOTH -# define S_IXOTH 0 -#endif -#ifndef S_IXGRP -# define S_IXGRP 0 -#endif - -#ifdef _MSC_VER -# define S_IXUSR _S_IEXEC -# define stat _stat -# ifndef _INTPTR_T_DEFINED -# define intptr_t int -# endif -#endif - -#ifndef DIR_SEPARATOR -# define DIR_SEPARATOR '/' -# define PATH_SEPARATOR ':' -#endif - -#if defined (_WIN32) || defined (__MSDOS__) || defined (__DJGPP__) || \ - defined (__OS2__) -# define HAVE_DOS_BASED_FILE_SYSTEM -# define FOPEN_WB "wb" -# ifndef DIR_SEPARATOR_2 -# define DIR_SEPARATOR_2 '\\' -# endif -# ifndef PATH_SEPARATOR_2 -# define PATH_SEPARATOR_2 ';' -# endif -#endif - -#ifndef DIR_SEPARATOR_2 -# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) -#else /* DIR_SEPARATOR_2 */ -# define IS_DIR_SEPARATOR(ch) \ - (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) -#endif /* DIR_SEPARATOR_2 */ - -#ifndef PATH_SEPARATOR_2 -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR) -#else /* PATH_SEPARATOR_2 */ -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2) -#endif /* PATH_SEPARATOR_2 */ - -#ifdef __CYGWIN__ -# define FOPEN_WB "wb" -#endif - -#ifndef FOPEN_WB -# define FOPEN_WB "w" -#endif -#ifndef _O_BINARY -# define _O_BINARY 0 -#endif - -#define XMALLOC(type, num) ((type *) xmalloc ((num) * sizeof(type))) -#define XFREE(stale) do { \ - if (stale) { free ((void *) stale); stale = 0; } \ -} while (0) - -#undef LTWRAPPER_DEBUGPRINTF -#if defined DEBUGWRAPPER -# define LTWRAPPER_DEBUGPRINTF(args) ltwrapper_debugprintf args -static void -ltwrapper_debugprintf (const char *fmt, ...) -{ - va_list args; - va_start (args, fmt); - (void) vfprintf (stderr, fmt, args); - va_end (args); -} -#else -# define LTWRAPPER_DEBUGPRINTF(args) -#endif - -const char *program_name = NULL; - -void *xmalloc (size_t num); -char *xstrdup (const char *string); -const char *base_name (const char *name); -char *find_executable (const char *wrapper); -char *chase_symlinks (const char *pathspec); -int make_executable (const char *path); -int check_executable (const char *path); -char *strendzap (char *str, const char *pat); -void lt_fatal (const char *message, ...); -void lt_setenv (const char *name, const char *value); -char *lt_extend_str (const char *orig_value, const char *add, int to_end); -void lt_opt_process_env_set (const char *arg); -void lt_opt_process_env_prepend (const char *arg); -void lt_opt_process_env_append (const char *arg); -int lt_split_name_value (const char *arg, char** name, char** value); -void lt_update_exe_path (const char *name, const char *value); -void lt_update_lib_path (const char *name, const char *value); - -static const char *script_text_part1 = -EOF - - func_emit_wrapper_part1 yes | - $SED -e 's/\([\\"]\)/\\\1/g' \ - -e 's/^/ "/' -e 's/$/\\n"/' - echo ";" - cat <"))); - for (i = 0; i < newargc; i++) - { - LTWRAPPER_DEBUGPRINTF (("(main) newargz[%d] : %s\n", i, (newargz[i] ? newargz[i] : ""))); - } - -EOF - - case $host_os in - mingw*) - cat <<"EOF" - /* execv doesn't actually work on mingw as expected on unix */ - rval = _spawnv (_P_WAIT, lt_argv_zero, (const char * const *) newargz); - if (rval == -1) - { - /* failed to start process */ - LTWRAPPER_DEBUGPRINTF (("(main) failed to launch target \"%s\": errno = %d\n", lt_argv_zero, errno)); - return 127; - } - return rval; -EOF - ;; - *) - cat <<"EOF" - execv (lt_argv_zero, newargz); - return rval; /* =127, but avoids unused variable warning */ -EOF - ;; - esac - - cat <<"EOF" -} - -void * -xmalloc (size_t num) -{ - void *p = (void *) malloc (num); - if (!p) - lt_fatal ("Memory exhausted"); - - return p; -} - -char * -xstrdup (const char *string) -{ - return string ? strcpy ((char *) xmalloc (strlen (string) + 1), - string) : NULL; -} - -const char * -base_name (const char *name) -{ - const char *base; - -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - /* Skip over the disk name in MSDOS pathnames. */ - if (isalpha ((unsigned char) name[0]) && name[1] == ':') - name += 2; -#endif - - for (base = name; *name; name++) - if (IS_DIR_SEPARATOR (*name)) - base = name + 1; - return base; -} - -int -check_executable (const char *path) -{ - struct stat st; - - LTWRAPPER_DEBUGPRINTF (("(check_executable) : %s\n", - path ? (*path ? path : "EMPTY!") : "NULL!")); - if ((!path) || (!*path)) - return 0; - - if ((stat (path, &st) >= 0) - && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) - return 1; - else - return 0; -} - -int -make_executable (const char *path) -{ - int rval = 0; - struct stat st; - - LTWRAPPER_DEBUGPRINTF (("(make_executable) : %s\n", - path ? (*path ? path : "EMPTY!") : "NULL!")); - if ((!path) || (!*path)) - return 0; - - if (stat (path, &st) >= 0) - { - rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR); - } - return rval; -} - -/* Searches for the full path of the wrapper. Returns - newly allocated full path name if found, NULL otherwise - Does not chase symlinks, even on platforms that support them. -*/ -char * -find_executable (const char *wrapper) -{ - int has_slash = 0; - const char *p; - const char *p_next; - /* static buffer for getcwd */ - char tmp[LT_PATHMAX + 1]; - int tmp_len; - char *concat_name; - - LTWRAPPER_DEBUGPRINTF (("(find_executable) : %s\n", - wrapper ? (*wrapper ? wrapper : "EMPTY!") : "NULL!")); - - if ((wrapper == NULL) || (*wrapper == '\0')) - return NULL; - - /* Absolute path? */ -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':') - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - else - { -#endif - if (IS_DIR_SEPARATOR (wrapper[0])) - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - } -#endif - - for (p = wrapper; *p; p++) - if (*p == '/') - { - has_slash = 1; - break; - } - if (!has_slash) - { - /* no slashes; search PATH */ - const char *path = getenv ("PATH"); - if (path != NULL) - { - for (p = path; *p; p = p_next) - { - const char *q; - size_t p_len; - for (q = p; *q; q++) - if (IS_PATH_SEPARATOR (*q)) - break; - p_len = q - p; - p_next = (*q == '\0' ? q : q + 1); - if (p_len == 0) - { - /* empty path: current directory */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal ("getcwd failed"); - tmp_len = strlen (tmp); - concat_name = - XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - } - else - { - concat_name = - XMALLOC (char, p_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, p, p_len); - concat_name[p_len] = '/'; - strcpy (concat_name + p_len + 1, wrapper); - } - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - } - /* not found in PATH; assume curdir */ - } - /* Relative path | not found in path: prepend cwd */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal ("getcwd failed"); - tmp_len = strlen (tmp); - concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - return NULL; -} - -char * -chase_symlinks (const char *pathspec) -{ -#ifndef S_ISLNK - return xstrdup (pathspec); -#else - char buf[LT_PATHMAX]; - struct stat s; - char *tmp_pathspec = xstrdup (pathspec); - char *p; - int has_symlinks = 0; - while (strlen (tmp_pathspec) && !has_symlinks) - { - LTWRAPPER_DEBUGPRINTF (("checking path component for symlinks: %s\n", - tmp_pathspec)); - if (lstat (tmp_pathspec, &s) == 0) - { - if (S_ISLNK (s.st_mode) != 0) - { - has_symlinks = 1; - break; - } - - /* search backwards for last DIR_SEPARATOR */ - p = tmp_pathspec + strlen (tmp_pathspec) - 1; - while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - p--; - if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - { - /* no more DIR_SEPARATORS left */ - break; - } - *p = '\0'; - } - else - { - char *errstr = strerror (errno); - lt_fatal ("Error accessing file %s (%s)", tmp_pathspec, errstr); - } - } - XFREE (tmp_pathspec); - - if (!has_symlinks) - { - return xstrdup (pathspec); - } - - tmp_pathspec = realpath (pathspec, buf); - if (tmp_pathspec == 0) - { - lt_fatal ("Could not follow symlinks for %s", pathspec); - } - return xstrdup (tmp_pathspec); -#endif -} - -char * -strendzap (char *str, const char *pat) -{ - size_t len, patlen; - - assert (str != NULL); - assert (pat != NULL); - - len = strlen (str); - patlen = strlen (pat); - - if (patlen <= len) - { - str += len - patlen; - if (strcmp (str, pat) == 0) - *str = '\0'; - } - return str; -} - -static void -lt_error_core (int exit_status, const char *mode, - const char *message, va_list ap) -{ - fprintf (stderr, "%s: %s: ", program_name, mode); - vfprintf (stderr, message, ap); - fprintf (stderr, ".\n"); - - if (exit_status >= 0) - exit (exit_status); -} - -void -lt_fatal (const char *message, ...) -{ - va_list ap; - va_start (ap, message); - lt_error_core (EXIT_FAILURE, "FATAL", message, ap); - va_end (ap); -} - -void -lt_setenv (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_setenv) setting '%s' to '%s'\n", - (name ? name : ""), - (value ? value : ""))); - { -#ifdef HAVE_SETENV - /* always make a copy, for consistency with !HAVE_SETENV */ - char *str = xstrdup (value); - setenv (name, str, 1); -#else - int len = strlen (name) + 1 + strlen (value) + 1; - char *str = XMALLOC (char, len); - sprintf (str, "%s=%s", name, value); - if (putenv (str) != EXIT_SUCCESS) - { - XFREE (str); - } -#endif - } -} - -char * -lt_extend_str (const char *orig_value, const char *add, int to_end) -{ - char *new_value; - if (orig_value && *orig_value) - { - int orig_value_len = strlen (orig_value); - int add_len = strlen (add); - new_value = XMALLOC (char, add_len + orig_value_len + 1); - if (to_end) - { - strcpy (new_value, orig_value); - strcpy (new_value + orig_value_len, add); - } - else - { - strcpy (new_value, add); - strcpy (new_value + add_len, orig_value); - } - } - else - { - new_value = xstrdup (add); - } - return new_value; -} - -int -lt_split_name_value (const char *arg, char** name, char** value) -{ - const char *p; - int len; - if (!arg || !*arg) - return 1; - - p = strchr (arg, (int)'='); - - if (!p) - return 1; - - *value = xstrdup (++p); - - len = strlen (arg) - strlen (*value); - *name = XMALLOC (char, len); - strncpy (*name, arg, len-1); - (*name)[len - 1] = '\0'; - - return 0; -} - -void -lt_opt_process_env_set (const char *arg) -{ - char *name = NULL; - char *value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_set_opt, arg); - } - - lt_setenv (name, value); - XFREE (name); - XFREE (value); -} - -void -lt_opt_process_env_prepend (const char *arg) -{ - char *name = NULL; - char *value = NULL; - char *new_value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_prepend_opt, arg); - } - - new_value = lt_extend_str (getenv (name), value, 0); - lt_setenv (name, new_value); - XFREE (new_value); - XFREE (name); - XFREE (value); -} - -void -lt_opt_process_env_append (const char *arg) -{ - char *name = NULL; - char *value = NULL; - char *new_value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_append_opt, arg); - } - - new_value = lt_extend_str (getenv (name), value, 1); - lt_setenv (name, new_value); - XFREE (new_value); - XFREE (name); - XFREE (value); -} - -void -lt_update_exe_path (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_update_exe_path) modifying '%s' by prepending '%s'\n", - (name ? name : ""), - (value ? value : ""))); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - /* some systems can't cope with a ':'-terminated path #' */ - int len = strlen (new_value); - while (((len = strlen (new_value)) > 0) && IS_PATH_SEPARATOR (new_value[len-1])) - { - new_value[len-1] = '\0'; - } - lt_setenv (name, new_value); - XFREE (new_value); - } -} - -void -lt_update_lib_path (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_update_lib_path) modifying '%s' by prepending '%s'\n", - (name ? name : ""), - (value ? value : ""))); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - lt_setenv (name, new_value); - XFREE (new_value); - } -} - - -EOF -} -# end: func_emit_cwrapperexe_src - -# func_mode_link arg... -func_mode_link () -{ - $opt_debug - case $host in - *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) - # It is impossible to link a dll without this setting, and - # we shouldn't force the makefile maintainer to figure out - # which system we are compiling for in order to pass an extra - # flag for every libtool invocation. - # allow_undefined=no - - # FIXME: Unfortunately, there are problems with the above when trying - # to make a dll which has undefined symbols, in which case not - # even a static library is built. For now, we need to specify - # -no-undefined on the libtool link line when we can be certain - # that all symbols are satisfied, otherwise we get a static library. - allow_undefined=yes - ;; - *) - allow_undefined=yes - ;; - esac - libtool_args=$nonopt - base_compile="$nonopt $@" - compile_command=$nonopt - finalize_command=$nonopt - - compile_rpath= - finalize_rpath= - compile_shlibpath= - finalize_shlibpath= - convenience= - old_convenience= - deplibs= - old_deplibs= - compiler_flags= - linker_flags= - dllsearchpath= - lib_search_path=`pwd` - inst_prefix_dir= - new_inherited_linker_flags= - - avoid_version=no - dlfiles= - dlprefiles= - dlself=no - export_dynamic=no - export_symbols= - export_symbols_regex= - generated= - libobjs= - ltlibs= - module=no - no_install=no - objs= - non_pic_objects= - precious_files_regex= - prefer_static_libs=no - preload=no - prev= - prevarg= - release= - rpath= - xrpath= - perm_rpath= - temp_rpath= - thread_safe=no - vinfo= - vinfo_number=no - weak_libs= - single_module="${wl}-single_module" - func_infer_tag $base_compile - - # We need to know -static, to get the right output filenames. - for arg - do - case $arg in - -shared) - test "$build_libtool_libs" != yes && \ - func_fatal_configuration "can not build a shared library" - build_old_libs=no - break - ;; - -all-static | -static | -static-libtool-libs) - case $arg in - -all-static) - if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then - func_warning "complete static linking is impossible in this configuration" - fi - if test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - -static) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=built - ;; - -static-libtool-libs) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - esac - build_libtool_libs=no - build_old_libs=yes - break - ;; - esac - done - - # See if our shared archives depend on static archives. - test -n "$old_archive_from_new_cmds" && build_old_libs=yes - - # Go through the arguments, transforming them on the way. - while test "$#" -gt 0; do - arg="$1" - shift - func_quote_for_eval "$arg" - qarg=$func_quote_for_eval_unquoted_result - func_append libtool_args " $func_quote_for_eval_result" - - # If the previous option needs an argument, assign it. - if test -n "$prev"; then - case $prev in - output) - func_append compile_command " @OUTPUT@" - func_append finalize_command " @OUTPUT@" - ;; - esac - - case $prev in - dlfiles|dlprefiles) - if test "$preload" = no; then - # Add the symbol object into the linking commands. - func_append compile_command " @SYMFILE@" - func_append finalize_command " @SYMFILE@" - preload=yes - fi - case $arg in - *.la | *.lo) ;; # We handle these cases below. - force) - if test "$dlself" = no; then - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - self) - if test "$prev" = dlprefiles; then - dlself=yes - elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then - dlself=yes - else - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - *) - if test "$prev" = dlfiles; then - dlfiles="$dlfiles $arg" - else - dlprefiles="$dlprefiles $arg" - fi - prev= - continue - ;; - esac - ;; - expsyms) - export_symbols="$arg" - test -f "$arg" \ - || func_fatal_error "symbol file \`$arg' does not exist" - prev= - continue - ;; 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do - if $opt_duplicate_deps ; then - case "$libs " in - *" $deplib "*) specialdeplibs="$specialdeplibs $deplib" ;; - esac - fi - libs="$libs $deplib" - done - - if test "$linkmode" = lib; then - libs="$predeps $libs $compiler_lib_search_path $postdeps" - - # Compute libraries that are listed more than once in $predeps - # $postdeps and mark them as special (i.e., whose duplicates are - # not to be eliminated). - pre_post_deps= - if $opt_duplicate_compiler_generated_deps; then - for pre_post_dep in $predeps $postdeps; do - case "$pre_post_deps " in - *" $pre_post_dep "*) specialdeplibs="$specialdeplibs $pre_post_deps" ;; - esac - pre_post_deps="$pre_post_deps $pre_post_dep" - done - fi - pre_post_deps= - fi - - deplibs= - newdependency_libs= - newlib_search_path= - need_relink=no # whether we're linking any uninstalled libtool libraries - notinst_deplibs= # not-installed libtool libraries - notinst_path= # paths that contain not-installed libtool libraries - - case $linkmode in - lib) - passes="conv dlpreopen link" - for file in $dlfiles $dlprefiles; do - case $file in - *.la) ;; - *) - func_fatal_help "libraries can \`-dlopen' only libtool libraries: $file" - ;; - esac - done - ;; - prog) - compile_deplibs= - finalize_deplibs= - alldeplibs=no - newdlfiles= - newdlprefiles= - passes="conv scan dlopen dlpreopen link" - ;; - *) passes="conv" - ;; - esac - - for pass in $passes; do - # The preopen pass in lib mode reverses $deplibs; put it back here - # so that -L comes before libs that need it for instance... - if test "$linkmode,$pass" = "lib,link"; then - ## FIXME: Find the place where the list is rebuilt in the wrong - ## order, and fix it there properly - tmp_deplibs= - for deplib in $deplibs; do - tmp_deplibs="$deplib $tmp_deplibs" - done - deplibs="$tmp_deplibs" - fi - - if test "$linkmode,$pass" = "lib,link" || - test "$linkmode,$pass" = "prog,scan"; then - libs="$deplibs" - deplibs= - fi - if test "$linkmode" = prog; then - case $pass in - dlopen) libs="$dlfiles" ;; - dlpreopen) libs="$dlprefiles" ;; - link) - libs="$deplibs %DEPLIBS%" - test "X$link_all_deplibs" != Xno && libs="$libs $dependency_libs" - ;; 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then - case "$new_inherited_linker_flags " in - *" $deplib "*) ;; - * ) new_inherited_linker_flags="$new_inherited_linker_flags $deplib" ;; - esac - fi - fi - continue - ;; - -l*) - if test "$linkmode" != lib && test "$linkmode" != prog; then - func_warning "\`-l' is ignored for archives/objects" - continue - fi - func_stripname '-l' '' "$deplib" - name=$func_stripname_result - if test "$linkmode" = lib; then - searchdirs="$newlib_search_path $lib_search_path $compiler_lib_search_dirs $sys_lib_search_path $shlib_search_path" - else - searchdirs="$newlib_search_path $lib_search_path $sys_lib_search_path $shlib_search_path" - fi - for searchdir in $searchdirs; do - for search_ext in .la $std_shrext .so .a; do - # Search the libtool library - lib="$searchdir/lib${name}${search_ext}" - if test -f "$lib"; then - if test "$search_ext" = ".la"; then - found=yes - else - found=no - fi - break 2 - fi - done - done - if test "$found" != yes; then - # deplib doesn't seem to be a libtool library - if test "$linkmode,$pass" = "prog,link"; then - compile_deplibs="$deplib $compile_deplibs" - finalize_deplibs="$deplib $finalize_deplibs" - else - deplibs="$deplib $deplibs" - test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs" - fi - continue - else # deplib is a libtool library - # If $allow_libtool_libs_with_static_runtimes && $deplib is a stdlib, - # We need to do some special things here, and not later. - if test "X$allow_libtool_libs_with_static_runtimes" = "Xyes" ; then - case " $predeps $postdeps " in - *" $deplib "*) - if func_lalib_p "$lib"; then - library_names= - old_library= - func_source "$lib" - for l in $old_library $library_names; do - ll="$l" - done - if test "X$ll" = "X$old_library" ; then # only static version available - found=no - func_dirname "$lib" "" "." - ladir="$func_dirname_result" - lib=$ladir/$old_library - if test "$linkmode,$pass" = "prog,link"; then - compile_deplibs="$deplib $compile_deplibs" - finalize_deplibs="$deplib $finalize_deplibs" - else - deplibs="$deplib $deplibs" - test "$linkmode" = lib && newdependency_libs="$deplib $newdependency_libs" - fi - continue - fi - fi - ;; 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then - $ECHO - $ECHO "*** And there doesn't seem to be a static archive available" - $ECHO "*** The link will probably fail, sorry" - else - add="$dir/$old_library" - fi - elif test -n "$old_library"; then - add="$dir/$old_library" - fi - fi - esac - elif test "$hardcode_minus_L" = no; then - case $host in - *-*-sunos*) add_shlibpath="$dir" ;; - esac - add_dir="-L$dir" - add="-l$name" - elif test "$hardcode_shlibpath_var" = no; then - add_shlibpath="$dir" - add="-l$name" - else - lib_linked=no - fi - ;; - relink) - if test "$hardcode_direct" = yes && - test "$hardcode_direct_absolute" = no; then - add="$dir/$linklib" - elif test "$hardcode_minus_L" = yes; then - add_dir="-L$dir" - # Try looking first in the location we're being installed to. - if test -n "$inst_prefix_dir"; then - case $libdir in - [\\/]*) - add_dir="$add_dir -L$inst_prefix_dir$libdir" - ;; - esac - fi - add="-l$name" - elif test "$hardcode_shlibpath_var" = yes; then - add_shlibpath="$dir" - add="-l$name" - else - lib_linked=no - fi - ;; - *) lib_linked=no ;; - esac - - if test "$lib_linked" != yes; then - func_fatal_configuration "unsupported hardcode properties" - fi - - if test -n "$add_shlibpath"; then - case :$compile_shlibpath: in - *":$add_shlibpath:"*) ;; - *) compile_shlibpath="$compile_shlibpath$add_shlibpath:" ;; - esac - fi - if test "$linkmode" = prog; then - test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs" - test -n "$add" && compile_deplibs="$add $compile_deplibs" - else - test -n "$add_dir" && deplibs="$add_dir $deplibs" - test -n "$add" && deplibs="$add $deplibs" - if test "$hardcode_direct" != yes && - test "$hardcode_minus_L" != yes && - test "$hardcode_shlibpath_var" = yes; then - case :$finalize_shlibpath: in - *":$libdir:"*) ;; - *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;; - esac - fi - fi - fi - - if test "$linkmode" = prog || test "$mode" = relink; then - add_shlibpath= - add_dir= - add= - # Finalize command for both is simple: just hardcode it. - if test "$hardcode_direct" = yes && - test "$hardcode_direct_absolute" = no; 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But we'll never go from static-only to shared-only. - -# ### BEGIN LIBTOOL TAG CONFIG: disable-shared -build_libtool_libs=no -build_old_libs=yes -# ### END LIBTOOL TAG CONFIG: disable-shared - -# ### BEGIN LIBTOOL TAG CONFIG: disable-static -build_old_libs=`case $build_libtool_libs in yes) echo no;; *) echo yes;; esac` -# ### END LIBTOOL TAG CONFIG: disable-static - -# Local Variables: -# mode:shell-script -# sh-indentation:2 -# End: -# vi:sw=2 - diff --git a/ExternalLibs/libogg-1.2.0/macos/compat/strdup.c b/ExternalLibs/libogg-1.2.0/macos/compat/strdup.c deleted file mode 100644 index 2ef4279..0000000 --- a/ExternalLibs/libogg-1.2.0/macos/compat/strdup.c +++ /dev/null @@ -1,21 +0,0 @@ -#include -#include -#include -#include - -char *strdup(const char *inStr) -{ - char *outStr = NULL; - - if (inStr == NULL) { - return NULL; - } - - outStr = _ogg_malloc(strlen(inStr) + 1); - - if (outStr != NULL) { - strcpy(outStr, inStr); - } - - return outStr; -} diff --git a/ExternalLibs/libogg-1.2.0/macos/compat/sys/types.h b/ExternalLibs/libogg-1.2.0/macos/compat/sys/types.h deleted file mode 100644 index b0d4f92..0000000 --- a/ExternalLibs/libogg-1.2.0/macos/compat/sys/types.h +++ /dev/null @@ -1 +0,0 @@ -#ifndef __SYS_TYPES_H__ #define __SYS_TYPES_H__ 1 #include #include #include typedef short int16_t; typedef long int32_t; typedef long long int64_t; #define vorbis_size32_t long #if defined(__cplusplus) extern "C" { #endif #pragma options align=power char *strdup(const char *inStr); #pragma options align=reset #if defined(__cplusplus) } #endif #endif /* __SYS_TYPES_H__ */ \ No newline at end of file diff --git a/ExternalLibs/libogg-1.2.0/macos/libogg.mcp b/ExternalLibs/libogg-1.2.0/macos/libogg.mcp deleted file mode 100644 index 6921abb..0000000 Binary files a/ExternalLibs/libogg-1.2.0/macos/libogg.mcp and /dev/null differ diff --git a/ExternalLibs/libogg-1.2.0/macos/libogg.mcp.exp b/ExternalLibs/libogg-1.2.0/macos/libogg.mcp.exp deleted file mode 100644 index f71c90e..0000000 --- a/ExternalLibs/libogg-1.2.0/macos/libogg.mcp.exp +++ /dev/null @@ -1,64 +0,0 @@ -### From - -# Ogg BITSTREAM PRIMITIVES: bitstream - -oggpack_writeinit -oggpack_writetrunc -oggpack_writealign -oggpack_writecopy -oggpack_reset -oggpack_writeclear -oggpack_readinit -oggpack_write -oggpack_look -oggpack_look1 -oggpack_adv -oggpack_adv1 -oggpack_read -oggpack_read1 -oggpack_bytes -oggpack_bits -oggpack_get_buffer - -# Ogg BITSTREAM PRIMITIVES: encoding - -ogg_stream_packetin -ogg_stream_pageout -ogg_stream_flush - -# Ogg BITSTREAM PRIMITIVES: decoding - -ogg_sync_init -ogg_sync_clear -ogg_sync_reset -ogg_sync_destroy - -ogg_sync_buffer -ogg_sync_wrote -ogg_sync_pageseek -ogg_sync_pageout -ogg_stream_pagein -ogg_stream_packetout -ogg_stream_packetpeek - -# Ogg BITSTREAM PRIMITIVES: general - -ogg_stream_init -ogg_stream_clear -ogg_stream_reset -ogg_stream_reset_serialno -ogg_stream_destroy -ogg_stream_eos - -ogg_page_checksum_set - -ogg_page_version -ogg_page_continued -ogg_page_bos -ogg_page_eos -ogg_page_granulepos -ogg_page_serialno -ogg_page_pageno -ogg_page_packets - -ogg_packet_clear \ No newline at end of file diff --git a/ExternalLibs/libogg-1.2.0/macosx/English.lproj/InfoPlist.strings b/ExternalLibs/libogg-1.2.0/macosx/English.lproj/InfoPlist.strings deleted file mode 100644 index b230fea..0000000 Binary files a/ExternalLibs/libogg-1.2.0/macosx/English.lproj/InfoPlist.strings and /dev/null differ diff --git a/ExternalLibs/libogg-1.2.0/macosx/Info.plist b/ExternalLibs/libogg-1.2.0/macosx/Info.plist deleted file mode 100644 index d075456..0000000 --- a/ExternalLibs/libogg-1.2.0/macosx/Info.plist +++ /dev/null @@ -1,30 +0,0 @@ - - - - - CFBundleDevelopmentRegion - English - CFBundleExecutable - Ogg - CFBundleGetInfoString - Ogg framework 1.1.4, Copyright © 1994-2009 Xiph.Org Foundation - CFBundleIconFile - - CFBundleIdentifier - org.xiph.ogg - CFBundleInfoDictionaryVersion - 6.0 - CFBundlePackageType - FMWK - CFBundleShortVersionString - 1.1.4 - CFBundleSignature - ???? - CFBundleVersion - 1.1.4 - NSHumanReadableCopyright - Ogg framework 1.1.4, Copyright © 1994-2009 Xiph.Org Foundation - CSResourcesFileMapped - - - diff --git a/ExternalLibs/libogg-1.2.0/macosx/Ogg.xcodeproj/project.pbxproj b/ExternalLibs/libogg-1.2.0/macosx/Ogg.xcodeproj/project.pbxproj deleted file mode 100644 index 596ccda..0000000 --- a/ExternalLibs/libogg-1.2.0/macosx/Ogg.xcodeproj/project.pbxproj +++ /dev/null @@ -1,363 +0,0 @@ -// !$*UTF8*$! -{ - archiveVersion = 1; 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Check the \`README' file, - it often tells you about the needed prerequisites for installing - this package. You may also peek at any GNU archive site, in case - some other package would contain this missing \`$1' program." - exit 1 - ;; -esac - -exit 0 - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-end: "$" -# End: diff --git a/ExternalLibs/libogg-1.2.0/ogg-uninstalled.pc.in b/ExternalLibs/libogg-1.2.0/ogg-uninstalled.pc.in deleted file mode 100644 index 6d692dc..0000000 --- a/ExternalLibs/libogg-1.2.0/ogg-uninstalled.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# ogg uninstalled pkg-config file - -prefix= -exec_prefix= -libdir=${pcfiledir}/src -includedir=${pcfiledir}/include - -Name: ogg -Description: ogg is a library for manipulating ogg bitstreams (not installed) -Version: @VERSION@ -Requires: -Conflicts: -Libs: ${libdir}/libogg.la -Cflags: -I${includedir} diff --git a/ExternalLibs/libogg-1.2.0/ogg.m4 b/ExternalLibs/libogg-1.2.0/ogg.m4 deleted file mode 100644 index 1d3fb8b..0000000 --- a/ExternalLibs/libogg-1.2.0/ogg.m4 +++ /dev/null @@ -1,116 +0,0 @@ -# Configure paths for libogg -# Jack Moffitt 10-21-2000 -# Shamelessly stolen from Owen Taylor and Manish Singh - -dnl XIPH_PATH_OGG([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) -dnl Test for libogg, and define OGG_CFLAGS and OGG_LIBS -dnl -AC_DEFUN([XIPH_PATH_OGG], -[dnl -dnl Get the cflags and libraries -dnl -AC_ARG_WITH(ogg,AC_HELP_STRING([--with-ogg=PFX],[Prefix where libogg is installed (optional)]), ogg_prefix="$withval", ogg_prefix="") -AC_ARG_WITH(ogg-libraries,AC_HELP_STRING([--with-ogg-libraries=DIR],[Directory where libogg library is installed (optional)]), ogg_libraries="$withval", ogg_libraries="") -AC_ARG_WITH(ogg-includes,AC_HELP_STRING([--with-ogg-includes=DIR],[Directory where libogg header files are installed (optional)]), ogg_includes="$withval", ogg_includes="") -AC_ARG_ENABLE(oggtest,AC_HELP_STRING([--disable-oggtest],[Do not try to compile and run a test Ogg program]),, enable_oggtest=yes) - - if test "x$ogg_libraries" != "x" ; then - OGG_LIBS="-L$ogg_libraries" - elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then - OGG_LIBS="" - elif test "x$ogg_prefix" != "x" ; then - OGG_LIBS="-L$ogg_prefix/lib" - elif test "x$prefix" != "xNONE" ; then - OGG_LIBS="-L$prefix/lib" - fi - - if test "x$ogg_prefix" != "xno" ; then - OGG_LIBS="$OGG_LIBS -logg" - fi - - if test "x$ogg_includes" != "x" ; then - OGG_CFLAGS="-I$ogg_includes" - elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then - OGG_CFLAGS="" - elif test "x$ogg_prefix" != "x" ; then - OGG_CFLAGS="-I$ogg_prefix/include" - elif test "x$prefix" != "xNONE"; then - OGG_CFLAGS="-I$prefix/include" - fi - - AC_MSG_CHECKING(for Ogg) - if test "x$ogg_prefix" = "xno" ; then - no_ogg="disabled" - enable_oggtest="no" - else - no_ogg="" - fi - - - if test "x$enable_oggtest" = "xyes" ; then - ac_save_CFLAGS="$CFLAGS" - ac_save_LIBS="$LIBS" - CFLAGS="$CFLAGS $OGG_CFLAGS" - LIBS="$LIBS $OGG_LIBS" -dnl -dnl Now check if the installed Ogg is sufficiently new. -dnl - rm -f conf.oggtest - AC_TRY_RUN([ -#include -#include -#include -#include - -int main () -{ - system("touch conf.oggtest"); - return 0; -} - -],, no_ogg=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - - if test "x$no_ogg" = "xdisabled" ; then - AC_MSG_RESULT(no) - ifelse([$2], , :, [$2]) - elif test "x$no_ogg" = "x" ; then - AC_MSG_RESULT(yes) - ifelse([$1], , :, [$1]) - else - AC_MSG_RESULT(no) - if test -f conf.oggtest ; then - : - else - echo "*** Could not run Ogg test program, checking why..." - CFLAGS="$CFLAGS $OGG_CFLAGS" - LIBS="$LIBS $OGG_LIBS" - AC_TRY_LINK([ -#include -#include -], [ return 0; ], - [ echo "*** The test program compiled, but did not run. This usually means" - echo "*** that the run-time linker is not finding Ogg or finding the wrong" - echo "*** version of Ogg. If it is not finding Ogg, you'll need to set your" - echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" - echo "*** to the installed location Also, make sure you have run ldconfig if that" - echo "*** is required on your system" - echo "***" - echo "*** If you have an old version installed, it is best to remove it, although" - echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], - [ echo "*** The test program failed to compile or link. See the file config.log for the" - echo "*** exact error that occured. This usually means Ogg was incorrectly installed" - echo "*** or that you have moved Ogg since it was installed." ]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - OGG_CFLAGS="" - OGG_LIBS="" - ifelse([$2], , :, [$2]) - fi - AC_SUBST(OGG_CFLAGS) - AC_SUBST(OGG_LIBS) - rm -f conf.oggtest -]) diff --git a/ExternalLibs/libogg-1.2.0/ogg.pc.in b/ExternalLibs/libogg-1.2.0/ogg.pc.in deleted file mode 100644 index 9e84375..0000000 --- a/ExternalLibs/libogg-1.2.0/ogg.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# ogg pkg-config file - -prefix=@prefix@ -exec_prefix=@exec_prefix@ -libdir=@libdir@ -includedir=@includedir@ - -Name: ogg -Description: ogg is a library for manipulating ogg bitstreams -Version: @VERSION@ -Requires: -Conflicts: -Libs: -L${libdir} -logg -Cflags: -I${includedir} diff --git a/ExternalLibs/libogg-1.2.0/src/Makefile.am b/ExternalLibs/libogg-1.2.0/src/Makefile.am deleted file mode 100644 index b207e78..0000000 --- a/ExternalLibs/libogg-1.2.0/src/Makefile.am +++ /dev/null @@ -1,28 +0,0 @@ -## Process this file with automake to produce Makefile.in - -INCLUDES = -I$(top_srcdir)/include -I$(top_builddir)/include - -lib_LTLIBRARIES = libogg.la - -libogg_la_SOURCES = framing.c bitwise.c -libogg_la_LDFLAGS = -no-undefined -version-info @LIB_CURRENT@:@LIB_REVISION@:@LIB_AGE@ - -# build and run the self tests on 'make check' - -noinst_PROGRAMS = test_bitwise test_framing - -test_bitwise_SOURCES = bitwise.c -test_bitwise_CFLAGS = -D_V_SELFTEST - -test_framing_SOURCES = framing.c -test_framing_CFLAGS = -D_V_SELFTEST - -check: $(noinst_PROGRAMS) - ./test_bitwise$(EXEEXT) - ./test_framing$(EXEEXT) - -debug: - $(MAKE) all CFLAGS="@DEBUG@" - -profile: - $(MAKE) all CFLAGS="@PROFILE@" diff --git a/ExternalLibs/libogg-1.2.0/src/Makefile.in b/ExternalLibs/libogg-1.2.0/src/Makefile.in deleted file mode 100644 index 534dfb0..0000000 --- a/ExternalLibs/libogg-1.2.0/src/Makefile.in +++ /dev/null @@ -1,541 +0,0 @@ -# Makefile.in generated by automake 1.9.6 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005 Free Software Foundation, Inc. -# This Makefile.in is free software; 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{15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).Deploy.0 = Debug|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).ActiveCfg = Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Build.0 = Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Deploy.0 = Debug|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 6 Professional SDK (ARMV4I).ActiveCfg = Debug|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 6 Professional SDK (ARMV4I).Build.0 = Debug|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Windows Mobile 6 Professional SDK (ARMV4I).Deploy.0 = Debug|Windows Mobile 6 Professional SDK (ARMV4I) - 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{15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Deploy.0 = Release_SSE|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I).ActiveCfg = Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I).Build.0 = Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I).Deploy.0 = Release_SSE|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.ActiveCfg = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.Build.0 = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.ActiveCfg = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.Build.0 = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).ActiveCfg = Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).Build.0 = Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).Deploy.0 = Release_SSE2|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).ActiveCfg = Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Build.0 = Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Deploy.0 = Release_SSE2|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I).ActiveCfg = Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I).Build.0 = Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I).Deploy.0 = Release_SSE2|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.ActiveCfg = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.Build.0 = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.ActiveCfg = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.Build.0 = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).ActiveCfg = Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).Build.0 = Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I).Deploy.0 = Release|Windows Mobile 5.0 Pocket PC SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).ActiveCfg = Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Build.0 = Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I).Deploy.0 = Release|Windows Mobile 5.0 Smartphone SDK 2 (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 6 Professional SDK (ARMV4I).ActiveCfg = Release|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 6 Professional SDK (ARMV4I).Build.0 = Release|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Windows Mobile 6 Professional SDK (ARMV4I).Deploy.0 = Release|Windows Mobile 6 Professional SDK (ARMV4I) - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.ActiveCfg = Release|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.Build.0 = Release|x64 - EndGlobalSection - GlobalSection(SolutionProperties) = preSolution - HideSolutionNode = FALSE - EndGlobalSection -EndGlobal diff --git a/ExternalLibs/libogg-1.2.0/win32/VS2005/libogg_static.vcproj b/ExternalLibs/libogg-1.2.0/win32/VS2005/libogg_static.vcproj deleted file mode 100644 index 853fd50..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS2005/libogg_static.vcproj +++ /dev/null @@ -1,218 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.sln b/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.sln deleted file mode 100644 index f4c4e2b..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.sln +++ /dev/null @@ -1,38 +0,0 @@ - -Microsoft Visual Studio Solution File, Format Version 10.00 -# Visual Studio 2008 -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libogg", "libogg_dynamic.vcproj", "{15CBFEFF-7965-41F5-B4E2-21E8795C9159}" -EndProject -Global - GlobalSection(SolutionConfigurationPlatforms) = preSolution - Debug|Win32 = Debug|Win32 - Debug|x64 = Debug|x64 - Release_SSE|Win32 = Release_SSE|Win32 - Release_SSE|x64 = Release_SSE|x64 - Release_SSE2|Win32 = Release_SSE2|Win32 - Release_SSE2|x64 = Release_SSE2|x64 - Release|Win32 = Release|Win32 - Release|x64 = Release|x64 - EndGlobalSection - GlobalSection(ProjectConfigurationPlatforms) = postSolution - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Win32.ActiveCfg = Debug|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Win32.Build.0 = Debug|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|x64.ActiveCfg = Debug|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|x64.Build.0 = Debug|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Win32.ActiveCfg = Release_SSE|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Win32.Build.0 = Release_SSE|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.ActiveCfg = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.Build.0 = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.ActiveCfg = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.Build.0 = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.ActiveCfg = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.Build.0 = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.ActiveCfg = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.Build.0 = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.ActiveCfg = Release|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.Build.0 = Release|x64 - EndGlobalSection - GlobalSection(SolutionProperties) = preSolution - HideSolutionNode = FALSE - EndGlobalSection -EndGlobal diff --git a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.vcproj b/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.vcproj deleted file mode 100644 index f483927..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_dynamic.vcproj +++ /dev/null @@ -1,226 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.sln b/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.sln deleted file mode 100644 index d8f55f0..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.sln +++ /dev/null @@ -1,38 +0,0 @@ - -Microsoft Visual Studio Solution File, Format Version 10.00 -# Visual Studio 2008 -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libogg_static", "libogg_static.vcproj", "{15CBFEFF-7965-41F5-B4E2-21E8795C9159}" -EndProject -Global - GlobalSection(SolutionConfigurationPlatforms) = preSolution - Debug|Win32 = Debug|Win32 - Debug|x64 = Debug|x64 - Release_SSE|Win32 = Release_SSE|Win32 - Release_SSE|x64 = Release_SSE|x64 - Release_SSE2|Win32 = Release_SSE2|Win32 - Release_SSE2|x64 = Release_SSE2|x64 - Release|Win32 = Release|Win32 - Release|x64 = Release|x64 - EndGlobalSection - GlobalSection(ProjectConfigurationPlatforms) = postSolution - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Win32.ActiveCfg = Debug|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|Win32.Build.0 = Debug|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|x64.ActiveCfg = Debug|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Debug|x64.Build.0 = Debug|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Win32.ActiveCfg = Release_SSE|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|Win32.Build.0 = Release_SSE|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.ActiveCfg = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE|x64.Build.0 = Release_SSE|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.ActiveCfg = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|Win32.Build.0 = Release_SSE2|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.ActiveCfg = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release_SSE2|x64.Build.0 = Release_SSE2|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.ActiveCfg = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|Win32.Build.0 = Release|Win32 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.ActiveCfg = Release|x64 - {15CBFEFF-7965-41F5-B4E2-21E8795C9159}.Release|x64.Build.0 = Release|x64 - EndGlobalSection - GlobalSection(SolutionProperties) = preSolution - HideSolutionNode = FALSE - EndGlobalSection -EndGlobal diff --git a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.vcproj b/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.vcproj deleted file mode 100644 index 0d410dd..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS2008/libogg_static.vcproj +++ /dev/null @@ -1,218 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic.bat b/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic.bat deleted file mode 100644 index f5c0668..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic.bat +++ /dev/null @@ -1,18 +0,0 @@ -@echo off -echo ---+++--- Building Ogg (Dynamic) ---+++--- - -if .%SRCROOT%==. set SRCROOT=i:\xiph - -set OLDPATH=%PATH% -set OLDINCLUDE=%INCLUDE% -set OLDLIB=%LIB% - -call "c:\program files\microsoft visual studio\vc98\bin\vcvars32.bat" -echo Setting include paths for Ogg -set INCLUDE=%INCLUDE%;%SRCROOT%\ogg\include -echo Compiling... -msdev ogg_dynamic.dsp /useenv /make "ogg_dynamic - Win32 Release" /rebuild - -set PATH=%OLDPATH% -set INCLUDE=%OLDINCLUDE% -set LIB=%OLDLIB% diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic_debug.bat b/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic_debug.bat deleted file mode 100644 index 300ce41..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_dynamic_debug.bat +++ /dev/null @@ -1,18 +0,0 @@ -@echo off -echo ---+++--- Building Ogg (Dynamic) ---+++--- - -if .%SRCROOT%==. set SRCROOT=i:\xiph - -set OLDPATH=%PATH% -set OLDINCLUDE=%INCLUDE% -set OLDLIB=%LIB% - -call "c:\program files\microsoft visual studio\vc98\bin\vcvars32.bat" -echo Setting include paths for Ogg -set INCLUDE=%INCLUDE%;%SRCROOT%\ogg\include -echo Compiling... -msdev ogg_dynamic.dsp /useenv /make "ogg_dynamic - Win32 Debug" /rebuild - -set PATH=%OLDPATH% -set INCLUDE=%OLDINCLUDE% -set LIB=%OLDLIB% diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static.bat b/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static.bat deleted file mode 100644 index 905a8f6..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static.bat +++ /dev/null @@ -1,18 +0,0 @@ -@echo off -echo ---+++--- Building Ogg (Static) ---+++--- - -if .%SRCROOT%==. set SRCROOT=i:\xiph - -set OLDPATH=%PATH% -set OLDINCLUDE=%INCLUDE% -set OLDLIB=%LIB% - -call "c:\program files\microsoft visual studio\vc98\bin\vcvars32.bat" -echo Setting include paths for Ogg -set INCLUDE=%INCLUDE%;%SRCROOT%\ogg\include -echo Compiling... -msdev ogg_static.dsp /useenv /make "ogg_static - Win32 Release" /rebuild - -set PATH=%OLDPATH% -set INCLUDE=%OLDINCLUDE% -set LIB=%OLDLIB% diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static_debug.bat b/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static_debug.bat deleted file mode 100644 index e2f66af..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/build_ogg_static_debug.bat +++ /dev/null @@ -1,18 +0,0 @@ -@echo off -echo ---+++--- Building Ogg (Static) ---+++--- - -if .%SRCROOT%==. set SRCROOT=i:\xiph - -set OLDPATH=%PATH% -set OLDINCLUDE=%INCLUDE% -set OLDLIB=%LIB% - -call "c:\program files\microsoft visual studio\vc98\bin\vcvars32.bat" -echo Setting include paths for Ogg -set INCLUDE=%INCLUDE%;%SRCROOT%\ogg\include -echo Compiling... -msdev ogg_static.dsp /useenv /make "ogg_static - Win32 Debug" /rebuild - -set PATH=%OLDPATH% -set INCLUDE=%OLDINCLUDE% -set LIB=%OLDLIB% diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg.dsw b/ExternalLibs/libogg-1.2.0/win32/VS6/ogg.dsw deleted file mode 100644 index f494720..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg.dsw +++ /dev/null @@ -1,41 +0,0 @@ -Microsoft Developer Studio Workspace File, Format Version 6.00 -# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE! - -############################################################################### - -Project: "ogg_dynamic"=.\ogg_dynamic.dsp - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ -}}} - -############################################################################### - -Project: "ogg_static"=.\ogg_static.dsp - Package Owner=<4> - -Package=<5> -{{{ -}}} - -Package=<4> -{{{ -}}} - -############################################################################### - -Global: - -Package=<5> -{{{ -}}} - -Package=<3> -{{{ -}}} - -############################################################################### - diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_dynamic.dsp b/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_dynamic.dsp deleted file mode 100644 index a46e029..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_dynamic.dsp +++ /dev/null @@ -1,128 +0,0 @@ -# Microsoft Developer Studio Project File - Name="ogg_dynamic" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102 - -CFG=ogg_dynamic - Win32 Debug -!MESSAGE This is not a valid makefile. To build this project using NMAKE, -!MESSAGE use the Export Makefile command and run -!MESSAGE -!MESSAGE NMAKE /f "ogg_dynamic.mak". -!MESSAGE -!MESSAGE You can specify a configuration when running NMAKE -!MESSAGE by defining the macro CFG on the command line. For example: -!MESSAGE -!MESSAGE NMAKE /f "ogg_dynamic.mak" CFG="ogg_dynamic - Win32 Debug" -!MESSAGE -!MESSAGE Possible choices for configuration are: -!MESSAGE -!MESSAGE "ogg_dynamic - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library") -!MESSAGE "ogg_dynamic - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library") -!MESSAGE - -# Begin Project -# PROP AllowPerConfigDependencies 0 -# PROP Scc_ProjName "" -# PROP Scc_LocalPath "" -CPP=cl.exe -MTL=midl.exe -RSC=rc.exe - -!IF "$(CFG)" == "ogg_dynamic - Win32 Release" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 0 -# PROP BASE Output_Dir "ogg_dynamic___Win32_Release" -# PROP BASE Intermediate_Dir "ogg_dynamic___Win32_Release" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 0 -# PROP Output_Dir "Dynamic_Release" -# PROP Intermediate_Dir "Dynamic_Release" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "OGG_DYNAMIC_EXPORTS" /YX /FD /c -# ADD CPP /nologo /MT /W3 /GX /O2 /I "..\..\include" /D "NDEBUG" /D "WIN32" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /YX /FD /c -# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32 -# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32 -# ADD BASE RSC /l 0x409 /d "NDEBUG" -# ADD RSC /l 0x409 /d "NDEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386 -# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386 /out:"Dynamic_Release/ogg.dll" - -!ELSEIF "$(CFG)" == "ogg_dynamic - Win32 Debug" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 1 -# PROP BASE Output_Dir "ogg_dynamic___Win32_Debug" -# PROP BASE Intermediate_Dir "ogg_dynamic___Win32_Debug" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 1 -# PROP Output_Dir "Dynamic_Debug" -# PROP Intermediate_Dir "Dynamic_Debug" -# PROP Ignore_Export_Lib 0 -# PROP Target_Dir "" -# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "OGG_DYNAMIC_EXPORTS" /YX /FD /GZ /c -# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "..\..\include" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /FR /FD /GZ /c -# SUBTRACT CPP /YX -# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32 -# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32 -# ADD BASE RSC /l 0x409 /d "_DEBUG" -# ADD RSC /l 0x409 /d "_DEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LINK32=link.exe -# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept -# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /out:"Dynamic_Debug/ogg_d.dll" /pdbtype:sept - -!ENDIF - -# Begin Target - -# Name "ogg_dynamic - Win32 Release" -# Name "ogg_dynamic - Win32 Debug" -# Begin Group "Source Files" - -# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat" -# Begin Source File - -SOURCE=..\..\src\bitwise.c -# End Source File -# Begin Source File - -SOURCE=..\..\src\framing.c -# End Source File -# End Group -# Begin Group "Header Files" - -# PROP Default_Filter "h;hpp;hxx;hm;inl" -# Begin Source File - -SOURCE=..\..\include\ogg\ogg.h -# End Source File -# Begin Source File - -SOURCE=..\..\include\ogg\os_types.h -# End Source File -# End Group -# Begin Group "Resource Files" - -# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe" -# End Group -# Begin Group "Other Files" - -# PROP Default_Filter ".def" -# Begin Source File - -SOURCE=..\ogg.def -# End Source File -# End Group -# End Target -# End Project diff --git a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_static.dsp b/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_static.dsp deleted file mode 100644 index d8b355e..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/VS6/ogg_static.dsp +++ /dev/null @@ -1,108 +0,0 @@ -# Microsoft Developer Studio Project File - Name="ogg_static" - Package Owner=<4> -# Microsoft Developer Studio Generated Build File, Format Version 6.00 -# ** DO NOT EDIT ** - -# TARGTYPE "Win32 (x86) Static Library" 0x0104 - -CFG=ogg_static - Win32 Debug -!MESSAGE This is not a valid makefile. To build this project using NMAKE, -!MESSAGE use the Export Makefile command and run -!MESSAGE -!MESSAGE NMAKE /f "ogg_static.mak". -!MESSAGE -!MESSAGE You can specify a configuration when running NMAKE -!MESSAGE by defining the macro CFG on the command line. For example: -!MESSAGE -!MESSAGE NMAKE /f "ogg_static.mak" CFG="ogg_static - Win32 Debug" -!MESSAGE -!MESSAGE Possible choices for configuration are: -!MESSAGE -!MESSAGE "ogg_static - Win32 Release" (based on "Win32 (x86) Static Library") -!MESSAGE "ogg_static - Win32 Debug" (based on "Win32 (x86) Static Library") -!MESSAGE - -# Begin Project -# PROP AllowPerConfigDependencies 0 -# PROP Scc_ProjName "" -# PROP Scc_LocalPath "" -CPP=xicl6.exe -RSC=rc.exe - -!IF "$(CFG)" == "ogg_static - Win32 Release" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 0 -# PROP BASE Output_Dir "Release" -# PROP BASE Intermediate_Dir "Release" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 0 -# PROP Output_Dir "Static_Release" -# PROP Intermediate_Dir "Static_Release" -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c -# ADD CPP /nologo /MT /W3 /GX /O2 /Ob1 /I "..\..\include" /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c -# ADD BASE RSC /l 0x409 /d "NDEBUG" -# ADD RSC /l 0x409 /d "NDEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LIB32=link.exe -lib -# ADD BASE LIB32 /nologo -# ADD LIB32 /nologo - -!ELSEIF "$(CFG)" == "ogg_static - Win32 Debug" - -# PROP BASE Use_MFC 0 -# PROP BASE Use_Debug_Libraries 1 -# PROP BASE Output_Dir "Debug" -# PROP BASE Intermediate_Dir "Debug" -# PROP BASE Target_Dir "" -# PROP Use_MFC 0 -# PROP Use_Debug_Libraries 1 -# PROP Output_Dir "Static_Debug" -# PROP Intermediate_Dir "Static_Debug" -# PROP Target_Dir "" -# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c -# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "..\..\include" /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c -# ADD BASE RSC /l 0x409 /d "_DEBUG" -# ADD RSC /l 0x409 /d "_DEBUG" -BSC32=bscmake.exe -# ADD BASE BSC32 /nologo -# ADD BSC32 /nologo -LIB32=link.exe -lib -# ADD BASE LIB32 /nologo -# ADD LIB32 /nologo /out:"Static_Debug\ogg_static_d.lib" - -!ENDIF - -# Begin Target - -# Name "ogg_static - Win32 Release" -# Name "ogg_static - Win32 Debug" -# Begin Group "Source Files" - -# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat" -# Begin Source File - -SOURCE=..\..\src\bitwise.c -# End Source File -# Begin Source File - -SOURCE=..\..\src\framing.c -# End Source File -# End Group -# Begin Group "Header Files" - -# PROP Default_Filter "h;hpp;hxx;hm;inl" -# Begin Source File - -SOURCE=..\..\include\ogg\ogg.h -# End Source File -# Begin Source File - -SOURCE=..\..\include\ogg\os_types.h -# End Source File -# End Group -# End Target -# End Project diff --git a/ExternalLibs/libogg-1.2.0/win32/ogg.def b/ExternalLibs/libogg-1.2.0/win32/ogg.def deleted file mode 100644 index f47d6db..0000000 --- a/ExternalLibs/libogg-1.2.0/win32/ogg.def +++ /dev/null @@ -1,78 +0,0 @@ -; $Id: ogg.def 14733 2008-04-14 21:27:06Z sping $ -; -; ogg.def -; -LIBRARY -EXPORTS -; -oggpack_writeinit -oggpack_writetrunc -oggpack_writealign -oggpack_writecopy -oggpack_reset -oggpack_writeclear -oggpack_readinit -oggpack_write -oggpack_look -oggpack_look1 -oggpack_adv -oggpack_adv1 -oggpack_read -oggpack_read1 -oggpack_bytes -oggpack_bits -oggpack_get_buffer -; -oggpackB_writeinit -oggpackB_writetrunc -oggpackB_writealign -oggpackB_writecopy -oggpackB_reset -oggpackB_writeclear -oggpackB_readinit -oggpackB_write -oggpackB_look -oggpackB_look1 -oggpackB_adv -oggpackB_adv1 -oggpackB_read -oggpackB_read1 -oggpackB_bytes -oggpackB_bits -oggpackB_get_buffer -; -ogg_stream_packetin -ogg_stream_pageout -ogg_stream_flush -; -ogg_sync_init -ogg_sync_clear -ogg_sync_reset -ogg_sync_destroy -ogg_sync_buffer -ogg_sync_wrote -ogg_sync_pageseek -ogg_sync_pageout -ogg_stream_pagein -ogg_stream_packetout -ogg_stream_packetpeek -; -ogg_stream_init -ogg_stream_clear -ogg_stream_reset -ogg_stream_reset_serialno -ogg_stream_destroy -ogg_stream_eos -; -ogg_page_checksum_set -ogg_page_version -ogg_page_continued -ogg_page_bos -ogg_page_eos -ogg_page_granulepos -ogg_page_serialno -ogg_page_pageno -ogg_page_packets -ogg_packet_clear - - diff --git a/ExternalLibs/libogg-1.2.0/COPYING b/ExternalLibs/libogg-1.3.0/COPYING similarity index 100% rename from ExternalLibs/libogg-1.2.0/COPYING rename to ExternalLibs/libogg-1.3.0/COPYING diff --git a/ExternalLibs/libogg-1.2.0/include/ogg/ogg.h b/ExternalLibs/libogg-1.3.0/include/ogg/ogg.h similarity index 95% rename from ExternalLibs/libogg-1.2.0/include/ogg/ogg.h rename to ExternalLibs/libogg-1.3.0/include/ogg/ogg.h index ae0cfd5..cea4ebe 100644 --- a/ExternalLibs/libogg-1.2.0/include/ogg/ogg.h +++ b/ExternalLibs/libogg-1.3.0/include/ogg/ogg.h @@ -11,7 +11,7 @@ ******************************************************************** function: toplevel libogg include - last mod: $Id: ogg.h 16051 2009-05-27 05:00:06Z xiphmont $ + last mod: $Id: ogg.h 18044 2011-08-01 17:55:20Z gmaxwell $ ********************************************************************/ #ifndef _OGG_H @@ -78,7 +78,7 @@ typedef struct { ogg_int64_t packetno; /* sequence number for decode; the framing knows where there's a hole in the data, but we need coupling so that the codec - (which is in a seperate abstraction + (which is in a separate abstraction layer) also knows about the gap */ ogg_int64_t granulepos; @@ -98,7 +98,7 @@ typedef struct { ogg_int64_t packetno; /* sequence number for decode; the framing knows where there's a hole in the data, but we need coupling so that the codec - (which is in a seperate abstraction + (which is in a separate abstraction layer) also knows about the gap */ } ogg_packet; @@ -159,7 +159,9 @@ extern int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op); extern int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov, int count, long e_o_s, ogg_int64_t granulepos); extern int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og); +extern int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill); extern int ogg_stream_flush(ogg_stream_state *os, ogg_page *og); +extern int ogg_stream_flush_fill(ogg_stream_state *os, ogg_page *og, int nfill); /* Ogg BITSTREAM PRIMITIVES: decoding **************************/ diff --git a/ExternalLibs/libogg-1.2.0/include/ogg/os_types.h b/ExternalLibs/libogg-1.3.0/include/ogg/os_types.h similarity index 94% rename from ExternalLibs/libogg-1.2.0/include/ogg/os_types.h rename to ExternalLibs/libogg-1.3.0/include/ogg/os_types.h index f6f8b38..d6691b7 100644 --- a/ExternalLibs/libogg-1.2.0/include/ogg/os_types.h +++ b/ExternalLibs/libogg-1.3.0/include/ogg/os_types.h @@ -11,7 +11,7 @@ ******************************************************************** function: #ifdef jail to whip a few platforms into the UNIX ideal. - last mod: $Id: os_types.h 16649 2009-10-25 00:49:58Z ds $ + last mod: $Id: os_types.h 17712 2010-12-03 17:10:02Z xiphmont $ ********************************************************************/ #ifndef _OS_TYPES_H @@ -68,11 +68,11 @@ #elif (defined(__APPLE__) && defined(__MACH__)) /* MacOS X Framework build */ -# include +# include typedef int16_t ogg_int16_t; - typedef u_int16_t ogg_uint16_t; + typedef uint16_t ogg_uint16_t; typedef int32_t ogg_int32_t; - typedef u_int32_t ogg_uint32_t; + typedef uint32_t ogg_uint32_t; typedef int64_t ogg_int64_t; #elif defined(__HAIKU__) @@ -90,9 +90,9 @@ /* Be */ # include typedef int16_t ogg_int16_t; - typedef u_int16_t ogg_uint16_t; + typedef uint16_t ogg_uint16_t; typedef int32_t ogg_int32_t; - typedef u_int32_t ogg_uint32_t; + typedef uint32_t ogg_uint32_t; typedef int64_t ogg_int64_t; #elif defined (__EMX__) @@ -140,7 +140,6 @@ #else -# include # include #endif diff --git a/ExternalLibs/libogg-1.2.0/src/bitwise.c b/ExternalLibs/libogg-1.3.0/src/bitwise.c similarity index 86% rename from ExternalLibs/libogg-1.2.0/src/bitwise.c rename to ExternalLibs/libogg-1.3.0/src/bitwise.c index e800901..68aca67 100644 --- a/ExternalLibs/libogg-1.2.0/src/bitwise.c +++ b/ExternalLibs/libogg-1.3.0/src/bitwise.c @@ -11,7 +11,7 @@ ******************************************************************** function: packing variable sized words into an octet stream - last mod: $Id: bitwise.c 16993 2010-03-21 23:15:46Z xiphmont $ + last mod: $Id: bitwise.c 18051 2011-08-04 17:56:39Z giles $ ********************************************************************/ @@ -20,6 +20,7 @@ #include #include +#include #include #define BUFFER_INCREMENT 256 @@ -80,24 +81,23 @@ void oggpackB_writetrunc(oggpack_buffer *b,long bits){ /* Takes only up to 32 bits. */ void oggpack_write(oggpack_buffer *b,unsigned long value,int bits){ - if(b->endbyte+4>=b->storage){ + if(bits<0 || bits>32) goto err; + if(b->endbyte>=b->storage-4){ void *ret; if(!b->ptr)return; + if(b->storage>LONG_MAX-BUFFER_INCREMENT) goto err; ret=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT); - if(!ret){ - oggpack_writeclear(b); - return; - } + if(!ret) goto err; b->buffer=ret; b->storage+=BUFFER_INCREMENT; b->ptr=b->buffer+b->endbyte; } - value&=mask[bits]; + value&=mask[bits]; bits+=b->endbit; - b->ptr[0]|=value<endbit; - + b->ptr[0]|=value<endbit; + if(bits>=8){ b->ptr[1]=(unsigned char)(value>>(8-b->endbit)); if(bits>=16){ @@ -117,28 +117,30 @@ void oggpack_write(oggpack_buffer *b,unsigned long value,int bits){ b->endbyte+=bits/8; b->ptr+=bits/8; b->endbit=bits&7; + return; + err: + oggpack_writeclear(b); } /* Takes only up to 32 bits. */ void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits){ - if(b->endbyte+4>=b->storage){ + if(bits<0 || bits>32) goto err; + if(b->endbyte>=b->storage-4){ void *ret; if(!b->ptr)return; + if(b->storage>LONG_MAX-BUFFER_INCREMENT) goto err; ret=_ogg_realloc(b->buffer,b->storage+BUFFER_INCREMENT); - if(!ret){ - oggpack_writeclear(b); - return; - } + if(!ret) goto err; b->buffer=ret; b->storage+=BUFFER_INCREMENT; b->ptr=b->buffer+b->endbyte; } - value=(value&mask[bits])<<(32-bits); + value=(value&mask[bits])<<(32-bits); bits+=b->endbit; - b->ptr[0]|=value>>(24+b->endbit); - + b->ptr[0]|=value>>(24+b->endbit); + if(bits>=8){ b->ptr[1]=(unsigned char)(value>>(16+b->endbit)); if(bits>=16){ @@ -158,6 +160,9 @@ void oggpackB_write(oggpack_buffer *b,unsigned long value,int bits){ b->endbyte+=bits/8; b->ptr+=bits/8; b->endbit=bits&7; + return; + err: + oggpack_writeclear(b); } void oggpack_writealign(oggpack_buffer *b){ @@ -188,18 +193,16 @@ static void oggpack_writecopy_helper(oggpack_buffer *b, int i; /* unaligned copy. Do it the hard way. */ for(i=0;iendbyte+bytes+1>=b->storage){ void *ret; - if(!b->ptr)return; + if(!b->ptr) goto err; + if(b->endbyte+bytes+BUFFER_INCREMENT>b->storage) goto err; b->storage=b->endbyte+bytes+BUFFER_INCREMENT; ret=_ogg_realloc(b->buffer,b->storage); - if(!ret){ - oggpack_writeclear(b); - return; - } + if(!ret) goto err; b->buffer=ret; b->ptr=b->buffer+b->endbyte; } @@ -212,10 +215,13 @@ static void oggpack_writecopy_helper(oggpack_buffer *b, } if(bits){ if(msb) - w(b,(unsigned long)(ptr[bytes]>>(8-bits)),bits); + w(b,(unsigned long)(ptr[bytes]>>(8-bits)),bits); else - w(b,(unsigned long)(ptr[bytes]),bits); + w(b,(unsigned long)(ptr[bytes]),bits); } + return; + err: + oggpack_writeclear(b); } void oggpack_writecopy(oggpack_buffer *b,void *source,long bits){ @@ -259,22 +265,27 @@ void oggpackB_readinit(oggpack_buffer *b,unsigned char *buf,int bytes){ /* Read in bits without advancing the bitptr; bits <= 32 */ long oggpack_look(oggpack_buffer *b,int bits){ unsigned long ret; - unsigned long m=mask[bits]; + unsigned long m; + if(bits<0 || bits>32) return -1; + m=mask[bits]; bits+=b->endbit; - if(b->endbyte+4>=b->storage){ + if(b->endbyte >= b->storage-4){ /* not the main path */ - if(b->endbyte*8+bits>b->storage*8)return(-1); + if(b->endbyte > b->storage-((bits+7)>>3)) return -1; + /* special case to avoid reading b->ptr[0], which might be past the end of + the buffer; also skips some useless accounting */ + else if(!bits)return(0L); } - + ret=b->ptr[0]>>b->endbit; if(bits>8){ - ret|=b->ptr[1]<<(8-b->endbit); + ret|=b->ptr[1]<<(8-b->endbit); if(bits>16){ - ret|=b->ptr[2]<<(16-b->endbit); + ret|=b->ptr[2]<<(16-b->endbit); if(bits>24){ - ret|=b->ptr[3]<<(24-b->endbit); + ret|=b->ptr[3]<<(24-b->endbit); if(bits>32 && b->endbit) ret|=b->ptr[4]<<(32-b->endbit); } @@ -288,20 +299,24 @@ long oggpackB_look(oggpack_buffer *b,int bits){ unsigned long ret; int m=32-bits; + if(m<0 || m>32) return -1; bits+=b->endbit; - if(b->endbyte+4>=b->storage){ + if(b->endbyte >= b->storage-4){ /* not the main path */ - if(b->endbyte*8+bits>b->storage*8)return(-1); + if(b->endbyte > b->storage-((bits+7)>>3)) return -1; + /* special case to avoid reading b->ptr[0], which might be past the end of + the buffer; also skips some useless accounting */ + else if(!bits)return(0L); } - + ret=b->ptr[0]<<(24+b->endbit); if(bits>8){ - ret|=b->ptr[1]<<(16+b->endbit); + ret|=b->ptr[1]<<(16+b->endbit); if(bits>16){ - ret|=b->ptr[2]<<(8+b->endbit); + ret|=b->ptr[2]<<(8+b->endbit); if(bits>24){ - ret|=b->ptr[3]<<(b->endbit); + ret|=b->ptr[3]<<(b->endbit); if(bits>32 && b->endbit) ret|=b->ptr[4]>>(8-b->endbit); } @@ -322,9 +337,18 @@ long oggpackB_look1(oggpack_buffer *b){ void oggpack_adv(oggpack_buffer *b,int bits){ bits+=b->endbit; + + if(b->endbyte > b->storage-((bits+7)>>3)) goto overflow; + b->ptr+=bits/8; b->endbyte+=bits/8; b->endbit=bits&7; + return; + + overflow: + b->ptr=NULL; + b->endbyte=b->storage; + b->endbit=1; } void oggpackB_adv(oggpack_buffer *b,int bits){ @@ -346,23 +370,27 @@ void oggpackB_adv1(oggpack_buffer *b){ /* bits <= 32 */ long oggpack_read(oggpack_buffer *b,int bits){ long ret; - unsigned long m=mask[bits]; + unsigned long m; + if(bits<0 || bits>32) goto err; + m=mask[bits]; bits+=b->endbit; - if(b->endbyte+4>=b->storage){ + if(b->endbyte >= b->storage-4){ /* not the main path */ - ret=-1L; - if(b->endbyte*8+bits>b->storage*8)goto overflow; + if(b->endbyte > b->storage-((bits+7)>>3)) goto overflow; + /* special case to avoid reading b->ptr[0], which might be past the end of + the buffer; also skips some useless accounting */ + else if(!bits)return(0L); } - + ret=b->ptr[0]>>b->endbit; if(bits>8){ - ret|=b->ptr[1]<<(8-b->endbit); + ret|=b->ptr[1]<<(8-b->endbit); if(bits>16){ - ret|=b->ptr[2]<<(16-b->endbit); + ret|=b->ptr[2]<<(16-b->endbit); if(bits>24){ - ret|=b->ptr[3]<<(24-b->endbit); + ret|=b->ptr[3]<<(24-b->endbit); if(bits>32 && b->endbit){ ret|=b->ptr[4]<<(32-b->endbit); } @@ -370,65 +398,67 @@ long oggpack_read(oggpack_buffer *b,int bits){ } } ret&=m; - - overflow: - b->ptr+=bits/8; b->endbyte+=bits/8; b->endbit=bits&7; - return(ret); + return ret; + + overflow: + err: + b->ptr=NULL; + b->endbyte=b->storage; + b->endbit=1; + return -1L; } /* bits <= 32 */ long oggpackB_read(oggpack_buffer *b,int bits){ long ret; long m=32-bits; - + + if(m<0 || m>32) goto err; bits+=b->endbit; if(b->endbyte+4>=b->storage){ /* not the main path */ - ret=-1L; - if(b->endbyte*8+bits>b->storage*8)goto overflow; + if(b->endbyte > b->storage-((bits+7)>>3)) goto overflow; /* special case to avoid reading b->ptr[0], which might be past the end of the buffer; also skips some useless accounting */ else if(!bits)return(0L); } - + ret=b->ptr[0]<<(24+b->endbit); if(bits>8){ - ret|=b->ptr[1]<<(16+b->endbit); + ret|=b->ptr[1]<<(16+b->endbit); if(bits>16){ - ret|=b->ptr[2]<<(8+b->endbit); + ret|=b->ptr[2]<<(8+b->endbit); if(bits>24){ - ret|=b->ptr[3]<<(b->endbit); + ret|=b->ptr[3]<<(b->endbit); if(bits>32 && b->endbit) ret|=b->ptr[4]>>(8-b->endbit); } } } ret=((ret&0xffffffffUL)>>(m>>1))>>((m+1)>>1); - - overflow: b->ptr+=bits/8; b->endbyte+=bits/8; b->endbit=bits&7; - return(ret); + return ret; + + overflow: + err: + b->ptr=NULL; + b->endbyte=b->storage; + b->endbit=1; + return -1L; } long oggpack_read1(oggpack_buffer *b){ long ret; - - if(b->endbyte>=b->storage){ - /* not the main path */ - ret=-1L; - goto overflow; - } + if(b->endbyte >= b->storage) goto overflow; ret=(b->ptr[0]>>b->endbit)&1; - - overflow: b->endbit++; if(b->endbit>7){ @@ -436,21 +466,20 @@ long oggpack_read1(oggpack_buffer *b){ b->ptr++; b->endbyte++; } - return(ret); + return ret; + + overflow: + b->ptr=NULL; + b->endbyte=b->storage; + b->endbit=1; + return -1L; } long oggpackB_read1(oggpack_buffer *b){ long ret; - - if(b->endbyte>=b->storage){ - /* not the main path */ - ret=-1L; - goto overflow; - } + if(b->endbyte >= b->storage) goto overflow; ret=(b->ptr[0]>>(7-b->endbit))&1; - - overflow: b->endbit++; if(b->endbit>7){ @@ -458,7 +487,13 @@ long oggpackB_read1(oggpack_buffer *b){ b->ptr++; b->endbyte++; } - return(ret); + return ret; + + overflow: + b->ptr=NULL; + b->endbyte=b->storage; + b->endbit=1; + return -1L; } long oggpack_bytes(oggpack_buffer *b){ @@ -476,7 +511,7 @@ long oggpackB_bytes(oggpack_buffer *b){ long oggpackB_bits(oggpack_buffer *b){ return oggpack_bits(b); } - + unsigned char *oggpack_get_buffer(oggpack_buffer *b){ return(b->buffer); } @@ -499,7 +534,7 @@ static int ilog(unsigned int v){ } return(ret); } - + oggpack_buffer o; oggpack_buffer r; @@ -546,7 +581,7 @@ void cliptest(unsigned long *b,int vals,int bits,int *comp,int compsize){ void cliptestB(unsigned long *b,int vals,int bits,int *comp,int compsize){ long bytes,i; unsigned char *buffer; - + oggpackB_reset(&o); for(i=0;iheader[16]<<16) | (og->header[17]<<24)); } - + long ogg_page_pageno(const ogg_page *og){ return(og->header[18] | (og->header[19]<<8) | @@ -76,16 +76,16 @@ long ogg_page_pageno(const ogg_page *og){ page, it's counted */ /* NOTE: -If a page consists of a packet begun on a previous page, and a new -packet begun (but not completed) on this page, the return will be: - ogg_page_packets(page) ==1, - ogg_page_continued(page) !=0 + If a page consists of a packet begun on a previous page, and a new + packet begun (but not completed) on this page, the return will be: + ogg_page_packets(page) ==1, + ogg_page_continued(page) !=0 -If a page happens to be a single packet that was begun on a -previous page, and spans to the next page (in the case of a three or -more page packet), the return will be: - ogg_page_packets(page) ==0, - ogg_page_continued(page) !=0 + If a page happens to be a single packet that was begun on a + previous page, and spans to the next page (in the case of a three or + more page packet), the return will be: + ogg_page_packets(page) ==0, + ogg_page_continued(page) !=0 */ int ogg_page_packets(const ogg_page *og){ @@ -205,7 +205,7 @@ int ogg_stream_init(ogg_stream_state *os,int serialno){ return(0); } return(-1); -} +} /* async/delayed error detection for the ogg_stream_state */ int ogg_stream_check(ogg_stream_state *os){ @@ -220,10 +220,10 @@ int ogg_stream_clear(ogg_stream_state *os){ if(os->lacing_vals)_ogg_free(os->lacing_vals); if(os->granule_vals)_ogg_free(os->granule_vals); - memset(os,0,sizeof(*os)); + memset(os,0,sizeof(*os)); } return(0); -} +} int ogg_stream_destroy(ogg_stream_state *os){ if(os){ @@ -231,7 +231,7 @@ int ogg_stream_destroy(ogg_stream_state *os){ _ogg_free(os); } return(0); -} +} /* Helpers for ogg_stream_encode; this keeps the structure and what's happening fairly clear */ @@ -275,7 +275,7 @@ static int _os_lacing_expand(ogg_stream_state *os,int needed){ /* checksum the page */ /* Direct table CRC; note that this will be faster in the future if we - perform the checksum silmultaneously with other copies */ + perform the checksum simultaneously with other copies */ void ogg_page_checksum_set(ogg_page *og){ if(og){ @@ -287,12 +287,12 @@ void ogg_page_checksum_set(ogg_page *og){ og->header[23]=0; og->header[24]=0; og->header[25]=0; - + for(i=0;iheader_len;i++) crc_reg=(crc_reg<<8)^crc_lookup[((crc_reg >> 24)&0xff)^og->header[i]]; for(i=0;ibody_len;i++) crc_reg=(crc_reg<<8)^crc_lookup[((crc_reg >> 24)&0xff)^og->body[i]]; - + og->header[22]=(unsigned char)(crc_reg&0xff); og->header[23]=(unsigned char)((crc_reg>>8)&0xff); og->header[24]=(unsigned char)((crc_reg>>16)&0xff); @@ -308,7 +308,7 @@ int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov, int count, if(ogg_stream_check(os)) return -1; if(!iov) return 0; - + for (i = 0; i < count; ++i) bytes += (int)iov[i].iov_len; lacing_vals=bytes/255+1; @@ -316,14 +316,14 @@ int ogg_stream_iovecin(ogg_stream_state *os, ogg_iovec_t *iov, int count, /* advance packet data according to the body_returned pointer. We had to keep it around to return a pointer into the buffer last call */ - + os->body_fill-=os->body_returned; if(os->body_fill) memmove(os->body_data,os->body_data+os->body_returned, os->body_fill); os->body_returned=0; } - + /* make sure we have the buffer storage */ if(_os_body_expand(os,bytes) || _os_lacing_expand(os,lacing_vals)) return -1; @@ -369,7 +369,7 @@ int ogg_stream_packetin(ogg_stream_state *os,ogg_packet *op){ /* Conditionally flush a page; force==0 will only flush nominal-size pages, force==1 forces us to flush a page regardless of page size so long as there's any data available at all. */ -static int ogg_stream_flush_i(ogg_stream_state *os,ogg_page *og, int force){ +static int ogg_stream_flush_i(ogg_stream_state *os,ogg_page *og, int force, int nfill){ int i; int vals=0; int maxvals=(os->lacing_fill>255?255:os->lacing_fill); @@ -407,7 +407,7 @@ static int ogg_stream_flush_i(ogg_stream_state *os,ogg_page *og, int force){ int packets_done=0; int packet_just_done=0; for(vals=0;vals4096 && packet_just_done>=4){ + if(acc>nfill && packet_just_done>=4){ force=1; break; } @@ -467,33 +467,33 @@ static int ogg_stream_flush_i(ogg_stream_state *os,ogg_page *og, int force){ pageno>>=8; } } - + /* zero for computation; filled in later */ os->header[22]=0; os->header[23]=0; os->header[24]=0; os->header[25]=0; - + /* segment table */ os->header[26]=(unsigned char)(vals&0xff); for(i=0;iheader[i+27]=(unsigned char)(os->lacing_vals[i]&0xff); - + /* set pointers in the ogg_page struct */ og->header=os->header; og->header_len=os->header_fill=vals+27; og->body=os->body_data+os->body_returned; og->body_len=bytes; - + /* advance the lacing data and set the body_returned pointer */ - + os->lacing_fill-=vals; memmove(os->lacing_vals,os->lacing_vals+vals,os->lacing_fill*sizeof(*os->lacing_vals)); memmove(os->granule_vals,os->granule_vals+vals,os->lacing_fill*sizeof(*os->granule_vals)); os->body_returned+=bytes; - + /* calculate the checksum */ - + ogg_page_checksum_set(og); /* done */ @@ -512,10 +512,18 @@ static int ogg_stream_flush_i(ogg_stream_state *os,ogg_page *og, int force){ since ogg_stream_flush will flush the last page in a stream even if it's undersized, you almost certainly want to use ogg_stream_pageout (and *not* ogg_stream_flush) unless you specifically need to flush - an page regardless of size in the middle of a stream. */ + a page regardless of size in the middle of a stream. */ int ogg_stream_flush(ogg_stream_state *os,ogg_page *og){ - return ogg_stream_flush_i(os,og,1); + return ogg_stream_flush_i(os,og,1,4096); +} + +/* Like the above, but an argument is provided to adjust the nominal + page size for applications which are smart enough to provide their + own delay based flushing */ + +int ogg_stream_flush_fill(ogg_stream_state *os,ogg_page *og, int nfill){ + return ogg_stream_flush_i(os,og,1,nfill); } /* This constructs pages from buffered packet segments. The pointers @@ -530,7 +538,22 @@ int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og){ (os->lacing_fill&&!os->b_o_s)) /* 'initial header page' case */ force=1; - return(ogg_stream_flush_i(os,og,force)); + return(ogg_stream_flush_i(os,og,force,4096)); +} + +/* Like the above, but an argument is provided to adjust the nominal +page size for applications which are smart enough to provide their +own delay based flushing */ + +int ogg_stream_pageout_fill(ogg_stream_state *os, ogg_page *og, int nfill){ + int force=0; + if(ogg_stream_check(os)) return 0; + + if((os->e_o_s&&os->lacing_fill) || /* 'were done, now flush' case */ + (os->lacing_fill&&!os->b_o_s)) /* 'initial header page' case */ + force=1; + + return(ogg_stream_flush_i(os,og,force,nfill)); } int ogg_stream_eos(ogg_stream_state *os){ @@ -630,7 +653,7 @@ int ogg_sync_wrote(ogg_sync_state *oy, long bytes){ -n) skipped n bytes 0) page not ready; more data (no bytes skipped) n) page synced at current location; page length n bytes - + */ long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og){ @@ -639,54 +662,54 @@ long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og){ long bytes=oy->fill-oy->returned; if(ogg_sync_check(oy))return 0; - + if(oy->headerbytes==0){ int headerbytes,i; if(bytes<27)return(0); /* not enough for a header */ - + /* verify capture pattern */ if(memcmp(page,"OggS",4))goto sync_fail; - + headerbytes=page[26]+27; if(bytesbodybytes+=page[27+i]; oy->headerbytes=headerbytes; } - + if(oy->bodybytes+oy->headerbytes>bytes)return(0); - + /* The whole test page is buffered. Verify the checksum */ { /* Grab the checksum bytes, set the header field to zero */ char chksum[4]; ogg_page log; - + memcpy(chksum,page+22,4); memset(page+22,0,4); - + /* set up a temp page struct and recompute the checksum */ log.header=page; log.header_len=oy->headerbytes; log.body=page+oy->headerbytes; log.body_len=oy->bodybytes; ogg_page_checksum_set(&log); - + /* Compare */ if(memcmp(chksum,page+22,4)){ /* D'oh. Mismatch! Corrupt page (or miscapture and not a page at all) */ /* replace the computed checksum with the one actually read in */ memcpy(page+22,chksum,4); - + /* Bad checksum. Lose sync */ goto sync_fail; } } - + /* yes, have a whole page all ready to go */ { unsigned char *page=oy->data+oy->returned; @@ -705,12 +728,12 @@ long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og){ oy->bodybytes=0; return(bytes); } - + sync_fail: - + oy->headerbytes=0; oy->bodybytes=0; - + /* search for possible capture */ next=memchr(page+1,'O',bytes-1); if(!next) @@ -721,7 +744,7 @@ long ogg_sync_pageseek(ogg_sync_state *oy,ogg_page *og){ } /* sync the stream and get a page. Keep trying until we find a page. - Supress 'sync errors' after reporting the first. + Suppress 'sync errors' after reporting the first. return values: -1) recapture (hole in data) @@ -749,7 +772,7 @@ int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og){ /* need more data */ return(0); } - + /* head did not start a synced page... skipped some bytes */ if(!oy->unsynced){ oy->unsynced=1; @@ -778,7 +801,7 @@ int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og){ int serialno=ogg_page_serialno(og); long pageno=ogg_page_pageno(og); int segments=header[26]; - + if(ogg_stream_check(os)) return -1; /* clean up 'returned data' */ @@ -833,7 +856,7 @@ int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og){ /* are we a 'continued packet' page? If so, we may need to skip some segments */ if(continued){ - if(os->lacing_fill<1 || + if(os->lacing_fill<1 || os->lacing_vals[os->lacing_fill-1]==0x400){ bos=0; for(;segptrbody_data+os->body_fill,body,bodysize); @@ -860,20 +883,20 @@ int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og){ int val=header[27+segptr]; os->lacing_vals[os->lacing_fill]=val; os->granule_vals[os->lacing_fill]=-1; - + if(bos){ os->lacing_vals[os->lacing_fill]|=0x100; bos=0; } - + if(val<255)saved=os->lacing_fill; - + os->lacing_fill++; segptr++; - + if(val<255)os->lacing_packet=os->lacing_fill; } - + /* set the granulepos on the last granuleval of the last full packet */ if(saved!=-1){ os->granule_vals[saved]=granulepos; @@ -957,7 +980,7 @@ static int _packetout(ogg_stream_state *os,ogg_packet *op,int adv){ /* Gather the whole packet. We'll have no holes or a partial packet */ { int size=os->lacing_vals[ptr]&0xff; - int bytes=size; + long bytes=size; int eos=os->lacing_vals[ptr]&0x200; /* last packet of the stream? */ int bos=os->lacing_vals[ptr]&0x100; /* first packet of the stream? */ @@ -1007,13 +1030,13 @@ void ogg_packet_clear(ogg_packet *op) { ogg_stream_state os_en, os_de; ogg_sync_state oy; -void checkpacket(ogg_packet *op,int len, int no, int pos){ +void checkpacket(ogg_packet *op,long len, int no, long pos){ long j; static int sequence=0; static int lastno=0; if(op->bytes!=len){ - fprintf(stderr,"incorrect packet length (%d != %d)!\n",op->bytes,len); + fprintf(stderr,"incorrect packet length (%ld != %ld)!\n",op->bytes,len); exit(1); } if(op->granulepos!=pos){ @@ -1478,7 +1501,7 @@ void test_pack(const int *pl, const int **headers, int byteskip, /* construct a test packet */ ogg_packet op; int len=pl[i]; - + op.packet=data+inptr; op.bytes=len; op.e_o_s=(pl[i+1]<0?1:0); @@ -1494,7 +1517,7 @@ void test_pack(const int *pl, const int **headers, int byteskip, /* retrieve any finished pages */ { ogg_page og; - + while(ogg_stream_pageout(&os_en,&og)){ /* We have a page. Check it carefully */ @@ -1543,8 +1566,8 @@ void test_pack(const int *pl, const int **headers, int byteskip, if(ret==0)break; if(ret<0)continue; /* got a page. Happy happy. Verify that it's good. */ - - fprintf(stderr,"(%ld), ",pageout); + + fprintf(stderr,"(%d), ",pageout); check_page(data+deptr,headers[pageout],&og_de); deptr+=og_de.body_len; @@ -1557,7 +1580,7 @@ void test_pack(const int *pl, const int **headers, int byteskip, while(ogg_stream_packetpeek(&os_de,&op_de2)>0){ ogg_stream_packetpeek(&os_de,NULL); ogg_stream_packetout(&os_de,&op_de); /* just catching them all */ - + /* verify peek and out match */ if(memcmp(&op_de,&op_de2,sizeof(op_de))){ fprintf(stderr,"packetout != packetpeek! pos=%ld\n", @@ -1583,7 +1606,7 @@ void test_pack(const int *pl, const int **headers, int byteskip, } bosflag=1; depacket+=op_de.bytes; - + /* check eos flag */ if(eosflag){ fprintf(stderr,"Multiple decoded packets with eos flag!\n"); @@ -1730,7 +1753,7 @@ int main(void){ 10,10,10,10,10,10,10,10, 10,10,10,10,10,10,10,50,-1}; const int *headret[]={head1_5,head2_5,head3_5,NULL}; - + fprintf(stderr,"testing max packet segments... "); test_pack(packets,headret,0,0,0); } @@ -1739,7 +1762,7 @@ int main(void){ /* packet that overspans over an entire page */ const int packets[]={0,100,130049,259,255,-1}; const int *headret[]={head1_6,head2_6,head3_6,head4_6,NULL}; - + fprintf(stderr,"testing very large packets... "); test_pack(packets,headret,0,0,0); } @@ -1749,7 +1772,7 @@ int main(void){ found by Josh Coalson) */ const int packets[]={0,100,130049,259,255,-1}; const int *headret[]={head1_6,head2_6,head3_6,head4_6,NULL}; - + fprintf(stderr,"testing continuation resync in very large packets... "); test_pack(packets,headret,100,2,3); } @@ -1758,7 +1781,7 @@ int main(void){ /* term only page. why not? */ const int packets[]={0,100,64770,-1}; const int *headret[]={head1_7,head2_7,head3_7,NULL}; - + fprintf(stderr,"testing zero data page (1 nil packet)... "); test_pack(packets,headret,0,0,0); } @@ -1771,13 +1794,13 @@ int main(void){ int pl[]={0, 1,1,98,4079, 1,1,2954,2057, 76,34,912,0,234,1000,1000, 1000,300,-1}; int inptr=0,i,j; ogg_page og[5]; - + ogg_stream_reset(&os_en); for(i=0;pl[i]!=-1;i++){ ogg_packet op; int len=pl[i]; - + op.packet=data+inptr; op.bytes=len; op.e_o_s=(pl[i+1]<0?1:0); @@ -1825,7 +1848,7 @@ int main(void){ ogg_stream_pagein(&os_de,&temp); /* do we get the expected results/packets? */ - + if(ogg_stream_packetout(&os_de,&test)!=1)error(); checkpacket(&test,0,0,0); if(ogg_stream_packetout(&os_de,&test)!=1)error(); @@ -1976,13 +1999,13 @@ int main(void){ fprintf(stderr,"ok.\n"); } - + /* Test recapture: garbage + page */ { ogg_page og_de; fprintf(stderr,"Testing search for capture... "); - ogg_sync_reset(&oy); - + ogg_sync_reset(&oy); + /* 'garbage' */ memcpy(ogg_sync_buffer(&oy,og[1].body_len),og[1].body, og[1].body_len); @@ -2018,7 +2041,7 @@ int main(void){ { ogg_page og_de; fprintf(stderr,"Testing recapture... "); - ogg_sync_reset(&oy); + ogg_sync_reset(&oy); memcpy(ogg_sync_buffer(&oy,og[1].header_len),og[1].header, og[1].header_len); @@ -2062,13 +2085,9 @@ int main(void){ free_page(&og[i]); } } - } + } return(0); } #endif - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/AUTHORS b/ExternalLibs/libvorbis-1.3.1/AUTHORS deleted file mode 100644 index 0da1036..0000000 --- a/ExternalLibs/libvorbis-1.3.1/AUTHORS +++ /dev/null @@ -1,3 +0,0 @@ -Monty - -and the rest of the Xiph.org Foundation. diff --git a/ExternalLibs/libvorbis-1.3.1/CHANGES b/ExternalLibs/libvorbis-1.3.1/CHANGES deleted file mode 100644 index f5740b9..0000000 --- a/ExternalLibs/libvorbis-1.3.1/CHANGES +++ /dev/null @@ -1,100 +0,0 @@ -libvorbis 1.3.1 (2010-02-26) -- "Xiph.Org libVorbis I 20100325 (Everywhere)" - - * tweak + minor arithmetic fix in floor1 fit - * revert noise norm to conservative 1.2.3 behavior pending - more listening testing - -libvorbis 1.3.0 (2010-02-25) -- unreleased staging snapshot - - * Optimized surround support for 5.1 encoding at 44.1/48kHz - * Added encoder control call to disable channel coupling - * Correct an overflow bug in very low-bitrate encoding on 32 bit - machines that caused inflated bitrates - * Numerous API hardening, leak and build fixes - * Correct bug in 22kHz compand setup that could cause a crash - * Correct bug in 16kHz codebooks that could cause unstable pure - tones at high bitrates - -libvorbis 1.2.3 (2009-07-09) -- "Xiph.Org libVorbis I 20090709" - - * correct a vorbisfile bug that prevented proper playback of - Vorbis files where all audio in a logical stream is in a - single page - * Additional decode setup hardening against malicious streams - * Add 'OV_EXCLUDE_STATIC_CALLBACKS' define for developers who - wish to avoid unused symbol warnings from the static callbacks - defined in vorbisfile.h - -libvorbis 1.2.2 (2009-06-24) -- "Xiph.Org libVorbis I 20090624" - - * define VENDOR and ENCODER strings - * seek correctly in files bigger than 2 GB (Windows) - * fix regression from CVE-2008-1420; 1.0b1 files work again - * mark all tables as constant to reduce memory occupation - * additional decoder hardening against malicious streams - * substantially reduce amount of seeking performed by Vorbisfile - * Multichannel decode bugfix - * build system updates - * minor specification clarifications/fixes - -libvorbis 1.2.1 (unreleased) -- "Xiph.Org libVorbis I 20080501" - - * Improved robustness with corrupt streams. - * New ov_read_filter() vorbisfile call allows filtering decoded - audio as floats before converting to integer samples. - * Fix an encoder bug with multichannel streams. - * Replaced RTP payload format draft with RFC 5215. - * Bare bones self test under 'make check'. - * Fix a problem encoding some streams between 14 and 28 kHz. - * Fix a numerical instability in the edge extrapolation filter. - * Build system improvements. - * Specification correction. - -libvorbis 1.2.0 (2007-07-25) -- "Xiph.Org libVorbis I 20070622" - - * new ov_fopen() convenience call that avoids the common - stdio conflicts with ov_open() and MSVC runtimes. - * libvorbisfile now handles multiplexed streams - * improve robustness to corrupt input streams - * fix a minor encoder bug - * updated RTP draft - * build system updates - * minor corrections to the specification - -libvorbis 1.1.2 (2005-11-27) -- "Xiph.Org libVorbis I 20050304" - - * fix a serious encoder bug with gcc 4 optimized builds - * documentation and spec fixes - * updated VS2003 and XCode builds - * new draft RTP encapsulation spec - -libvorbis 1.1.1 (2005-06-27) -- "Xiph.Org libVorbis I 20050304" - - * bug fix to the bitrate management encoder interface - * bug fix to properly set packetno field in the encoder - * new draft RTP encapsulation spec - * library API documentation improvements - -libvorbis 1.1.0 (2004-09-22) -- "Xiph.Org libVorbis I 20040629" - - * merges tuning improvements from Aoyumi's aoTuV with fixups - * new managed bitrate (CBR) mode support - * new vorbis_encoder_ctl() interface - * extensive documentation updates - * application/ogg mimetype is now official - * autotools cleanup from Thomas Vander Stichele - * SymbianOS build support from Colin Ward at CSIRO - * various bugfixes - * various packaging improvements - -libvorbis 1.0.1 (2003-11-17) -- "Xiph.Org libVorbis I 20030909" - - * numerous bug fixes - * specification corrections - * new crosslap and halfrate APIs for game use - * packaging and build updates - -libvorbis 1.0.0 (2002-07-19) -- "Xiph.Org libVorbis I 20020717" - - * first stable release - diff --git a/ExternalLibs/libvorbis-1.3.1/Makefile.am b/ExternalLibs/libvorbis-1.3.1/Makefile.am deleted file mode 100644 index 7ddc442..0000000 --- a/ExternalLibs/libvorbis-1.3.1/Makefile.am +++ /dev/null @@ -1,45 +0,0 @@ -## Process this file with automake to produce Makefile.in - -AUTOMAKE_OPTIONS = 1.7 foreign dist-zip dist-bzip2 - -SUBDIRS = m4 include vq lib test doc - -if BUILD_EXAMPLES -SUBDIRS += examples -endif - -m4datadir = $(datadir)/aclocal -m4data_DATA = vorbis.m4 - -pkgconfigdir = $(libdir)/pkgconfig -pkgconfig_DATA = vorbis.pc vorbisenc.pc vorbisfile.pc - 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PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * -* * -* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * -* by the Xiph.org Foundation, http://www.xiph.org/ * -* * -******************************************************************** - -Vorbis is a general purpose audio and music encoding format -contemporary to MPEG-4's AAC and TwinVQ, the next generation beyond -MPEG audio layer 3. Unlike the MPEG sponsored formats (and other -proprietary formats such as RealAudio G2 and Windows' flavor of the -month), the Vorbis CODEC specification belongs to the public domain. -All the technical details are published and documented, and any -software entity may make full use of the format without license -fee, royalty or patent concerns. - -This package contains: - -* libvorbis, a BSD-style license software implementation of - the Vorbis specification by the Xiph.Org Foundation - (http://www.xiph.org/) - -* libvorbisfile, a BSD-style license convenience library - built on Vorbis designed to simplify common uses - -* libvorbisenc, a BSD-style license library that provides a simple, - programmatic encoding setup interface - -* example code making use of libogg, libvorbis, libvorbisfile and - libvorbisenc - -WHAT'S HERE: - -This source distribution includes libvorbis and an example -encoder/player to demonstrate use of libvorbis as well as -documentation on the Ogg Vorbis audio coding format. - -You'll need libogg (distributed separately) to compile this library. -A more comprehensive set of utilities is available in the vorbis-tools -package. - -Directory: - -./lib The source for the libraries, a BSD-license implementation - of the public domain Ogg Vorbis audio encoding format. - -./include Library API headers - -./debian Rules/spec files for building Debian .deb packages - -./doc Vorbis documentation - -./examples Example code illustrating programmatic use of libvorbis, - libvorbisfile and libvorbisenc - -./mac Codewarrior project files and build tweaks for MacOS. - -./macosx Project files for MacOS X. - -./win32 Win32 projects files and build automation - -./vq Internal utilities for training/building new LSP/residue - and auxiliary codebooks. - -CONTACT: - -The Ogg homepage is located at 'http://www.xiph.org/ogg/'. -Vorbis's homepage is located at 'http://www.xiph.org/vorbis/'. -Up to date technical documents, contact information, source code and -pre-built utilities may be found there. - -The user website for Ogg Vorbis software and audio is http://vorbis.com/ - -BUILDING FROM TRUNK: - -Development source is under subversion revision control at -https://svn.xiph.org/trunk/vorbis/. You will also need the -newest versions of autoconf, automake, libtool and pkg-config in -order to compile Vorbis from development source. A configure script -is provided for you in the source tarball distributions. - - [update or checkout latest source] - ./autogen.sh - make - -and as root if desired: - - make install - -This will install the Vorbis libraries (static and shared) into -/usr/local/lib, includes into /usr/local/include and API manpages -(once we write some) into /usr/local/man. - -Documentation building requires xsltproc and pdfxmltex. - -BUILDING FROM TARBALL DISTRIBUTIONS: - - ./configure - make - -and optionally (as root): - make install - -BUILDING RPMS: - -after normal configuring: - - make dist - rpm -ta libvorbis-.tar.gz - -BUILDING ON MACOS 9: - -Vorbis on MacOS 9 is built using Metroworks CodeWarrior. To build it, -first verify that the Ogg libraries are already built following the -instructions in the Ogg module README. Open vorbis/mac/libvorbis.mcp, -switch to the "Targets" pane, select everything, and make the project. -Do the same thing to build libvorbisenc.mcp, and libvorbisfile.mcp (in -that order). In vorbis/mac/Output you will now have both debug and final -versions of Vorbis shared libraries to link your projects against. - -To build a project using Ogg Vorbis, add access paths to your -CodeWarrior project for the ogg/include, ogg/mac/Output, -vorbis/include, and vorbis/mac/Output folders. Be sure that -"interpret DOS and Unix paths" is turned on in your project; it can -be found in the "access paths" pane in your project settings. Now -simply add the shared libraries you need to your project (OggLib and -VorbisLib at least) and #include "ogg/ogg.h" and "vorbis/codec.h" -wherever you need to access Ogg and Vorbis functionality. - diff --git a/ExternalLibs/libvorbis-1.3.1/aclocal.m4 b/ExternalLibs/libvorbis-1.3.1/aclocal.m4 deleted file mode 100644 index 333cfa8..0000000 --- a/ExternalLibs/libvorbis-1.3.1/aclocal.m4 +++ /dev/null @@ -1,8921 +0,0 @@ -# generated automatically by aclocal 1.10.2 -*- Autoconf -*- - -# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, -# 2005, 2006, 2007, 2008 Free Software Foundation, Inc. -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -m4_ifndef([AC_AUTOCONF_VERSION], - [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl -m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.61],, -[m4_warning([this file was generated for autoconf 2.61. -You have another version of autoconf. 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- esac - ;; - esac - fi - done - IFS="$lt_save_ifs" - done - : ${lt_cv_path_NM=no} -fi]) -if test "$lt_cv_path_NM" != "no"; then - NM="$lt_cv_path_NM" -else - # Didn't find any BSD compatible name lister, look for dumpbin. - AC_CHECK_TOOLS(DUMPBIN, ["dumpbin -symbols" "link -dump -symbols"], :) - AC_SUBST([DUMPBIN]) - if test "$DUMPBIN" != ":"; then - NM="$DUMPBIN" - fi -fi -test -z "$NM" && NM=nm -AC_SUBST([NM]) -_LT_DECL([], [NM], [1], [A BSD- or MS-compatible name lister])dnl - -AC_CACHE_CHECK([the name lister ($NM) interface], [lt_cv_nm_interface], - [lt_cv_nm_interface="BSD nm" - echo "int some_variable = 0;" > conftest.$ac_ext - (eval echo "\"\$as_me:__oline__: $ac_compile\"" >&AS_MESSAGE_LOG_FD) - (eval "$ac_compile" 2>conftest.err) - cat conftest.err >&AS_MESSAGE_LOG_FD - (eval echo "\"\$as_me:__oline__: $NM \\\"conftest.$ac_objext\\\"\"" >&AS_MESSAGE_LOG_FD) - (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out) - cat conftest.err >&AS_MESSAGE_LOG_FD - (eval echo "\"\$as_me:__oline__: output\"" >&AS_MESSAGE_LOG_FD) - cat conftest.out >&AS_MESSAGE_LOG_FD - if $GREP 'External.*some_variable' conftest.out > /dev/null; then - lt_cv_nm_interface="MS dumpbin" - fi - rm -f conftest*]) -])# LT_PATH_NM - -# Old names: -AU_ALIAS([AM_PROG_NM], [LT_PATH_NM]) -AU_ALIAS([AC_PROG_NM], [LT_PATH_NM]) -dnl aclocal-1.4 backwards compatibility: -dnl AC_DEFUN([AM_PROG_NM], []) -dnl AC_DEFUN([AC_PROG_NM], []) - - -# LT_LIB_M -# -------- -# check for math library -AC_DEFUN([LT_LIB_M], -[AC_REQUIRE([AC_CANONICAL_HOST])dnl -LIBM= -case $host in -*-*-beos* | *-*-cygwin* | *-*-pw32* | *-*-darwin*) - # These system don't have libm, or don't need it - ;; -*-ncr-sysv4.3*) - AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw") - AC_CHECK_LIB(m, cos, LIBM="$LIBM -lm") - ;; -*) - AC_CHECK_LIB(m, cos, LIBM="-lm") - ;; -esac -AC_SUBST([LIBM]) -])# LT_LIB_M - -# Old name: -AU_ALIAS([AC_CHECK_LIBM], [LT_LIB_M]) -dnl aclocal-1.4 backwards compatibility: -dnl AC_DEFUN([AC_CHECK_LIBM], []) - - -# _LT_COMPILER_NO_RTTI([TAGNAME]) -# ------------------------------- -m4_defun([_LT_COMPILER_NO_RTTI], -[m4_require([_LT_TAG_COMPILER])dnl - -_LT_TAGVAR(lt_prog_compiler_no_builtin_flag, $1)= - -if test "$GCC" = yes; 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- 2020:CLIX:*:* | 2430:CLIX:*:*) - echo clipper-intergraph-clix${UNAME_RELEASE} - exit ;; - mips:*:*:UMIPS | mips:*:*:RISCos) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c -#ifdef __cplusplus -#include /* for printf() prototype */ - int main (int argc, char *argv[]) { -#else - int main (argc, argv) int argc; char *argv[]; { -#endif - #if defined (host_mips) && defined (MIPSEB) - #if defined (SYSTYPE_SYSV) - printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0); - #endif - #if defined (SYSTYPE_SVR4) - printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0); - #endif - #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) - printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0); - #endif - #endif - exit (-1); - } -EOF - $CC_FOR_BUILD -o $dummy $dummy.c && - dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` && - SYSTEM_NAME=`$dummy $dummyarg` && - { echo "$SYSTEM_NAME"; exit; } - echo mips-mips-riscos${UNAME_RELEASE} - exit ;; - Motorola:PowerMAX_OS:*:*) - echo powerpc-motorola-powermax - exit ;; - Motorola:*:4.3:PL8-*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*) - echo powerpc-harris-powermax - exit ;; - Night_Hawk:Power_UNIX:*:*) - echo powerpc-harris-powerunix - exit ;; - m88k:CX/UX:7*:*) - echo m88k-harris-cxux7 - exit ;; - m88k:*:4*:R4*) - echo m88k-motorola-sysv4 - exit ;; - m88k:*:3*:R3*) - echo m88k-motorola-sysv3 - exit ;; - AViiON:dgux:*:*) - # DG/UX returns AViiON for all architectures - UNAME_PROCESSOR=`/usr/bin/uname -p` - if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ] - then - if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \ - [ ${TARGET_BINARY_INTERFACE}x = x ] - then - echo m88k-dg-dgux${UNAME_RELEASE} - else - echo m88k-dg-dguxbcs${UNAME_RELEASE} - fi - else - echo i586-dg-dgux${UNAME_RELEASE} - fi - exit ;; - M88*:DolphinOS:*:*) # DolphinOS (SVR3) - echo m88k-dolphin-sysv3 - exit ;; - M88*:*:R3*:*) - # Delta 88k system running SVR3 - echo m88k-motorola-sysv3 - exit ;; - XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) - echo m88k-tektronix-sysv3 - exit ;; - Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) - echo m68k-tektronix-bsd - exit ;; - *:IRIX*:*:*) - echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'` - exit ;; - ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. - echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id - exit ;; # Note that: echo "'`uname -s`'" gives 'AIX ' - i*86:AIX:*:*) - echo i386-ibm-aix - exit ;; - ia64:AIX:*:*) - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` - else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} - fi - echo ${UNAME_MACHINE}-ibm-aix${IBM_REV} - exit ;; - *:AIX:2:3) - if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - - main() - { - if (!__power_pc()) - exit(1); - puts("powerpc-ibm-aix3.2.5"); - exit(0); - } -EOF - if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` - then - echo "$SYSTEM_NAME" - else - echo rs6000-ibm-aix3.2.5 - fi - elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then - echo rs6000-ibm-aix3.2.4 - else - echo rs6000-ibm-aix3.2 - fi - exit ;; - *:AIX:*:[45]) - IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'` - if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then - IBM_ARCH=rs6000 - else - IBM_ARCH=powerpc - fi - if [ -x /usr/bin/oslevel ] ; then - IBM_REV=`/usr/bin/oslevel` - else - IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE} - fi - echo ${IBM_ARCH}-ibm-aix${IBM_REV} - exit ;; - *:AIX:*:*) - echo rs6000-ibm-aix - exit ;; - ibmrt:4.4BSD:*|romp-ibm:BSD:*) - echo romp-ibm-bsd4.4 - exit ;; - ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC BSD and - echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to - exit ;; # report: romp-ibm BSD 4.3 - *:BOSX:*:*) - echo rs6000-bull-bosx - exit ;; - DPX/2?00:B.O.S.:*:*) - echo m68k-bull-sysv3 - exit ;; - 9000/[34]??:4.3bsd:1.*:*) - echo m68k-hp-bsd - exit ;; - hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) - echo m68k-hp-bsd4.4 - exit ;; - 9000/[34678]??:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - case "${UNAME_MACHINE}" in - 9000/31? ) HP_ARCH=m68000 ;; - 9000/[34]?? ) HP_ARCH=m68k ;; - 9000/[678][0-9][0-9]) - if [ -x /usr/bin/getconf ]; then - sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null` - sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null` - case "${sc_cpu_version}" in - 523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0 - 528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1 - 532) # CPU_PA_RISC2_0 - case "${sc_kernel_bits}" in - 32) HP_ARCH="hppa2.0n" ;; - 64) HP_ARCH="hppa2.0w" ;; - '') HP_ARCH="hppa2.0" ;; # HP-UX 10.20 - esac ;; - esac - fi - if [ "${HP_ARCH}" = "" ]; then - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - - #define _HPUX_SOURCE - #include - #include - - int main () - { - #if defined(_SC_KERNEL_BITS) - long bits = sysconf(_SC_KERNEL_BITS); - #endif - long cpu = sysconf (_SC_CPU_VERSION); - - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1"); break; - case CPU_PA_RISC2_0: - #if defined(_SC_KERNEL_BITS) - switch (bits) - { - case 64: puts ("hppa2.0w"); break; - case 32: puts ("hppa2.0n"); break; - default: puts ("hppa2.0"); break; - } break; - #else /* !defined(_SC_KERNEL_BITS) */ - puts ("hppa2.0"); break; - #endif - default: puts ("hppa1.0"); break; - } - exit (0); - } -EOF - (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy` - test -z "$HP_ARCH" && HP_ARCH=hppa - fi ;; - esac - if [ ${HP_ARCH} = "hppa2.0w" ] - then - eval $set_cc_for_build - - # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating - # 32-bit code. hppa64-hp-hpux* has the same kernel and a compiler - # generating 64-bit code. GNU and HP use different nomenclature: - # - # $ CC_FOR_BUILD=cc ./config.guess - # => hppa2.0w-hp-hpux11.23 - # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess - # => hppa64-hp-hpux11.23 - - if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | - grep __LP64__ >/dev/null - then - HP_ARCH="hppa2.0w" - else - HP_ARCH="hppa64" - fi - fi - echo ${HP_ARCH}-hp-hpux${HPUX_REV} - exit ;; - ia64:HP-UX:*:*) - HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` - echo ia64-hp-hpux${HPUX_REV} - exit ;; - 3050*:HI-UX:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #include - int - main () - { - long cpu = sysconf (_SC_CPU_VERSION); - /* The order matters, because CPU_IS_HP_MC68K erroneously returns - true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct - results, however. */ - if (CPU_IS_PA_RISC (cpu)) - { - switch (cpu) - { - case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; - case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; - case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; - default: puts ("hppa-hitachi-hiuxwe2"); break; - } - } - else if (CPU_IS_HP_MC68K (cpu)) - puts ("m68k-hitachi-hiuxwe2"); - else puts ("unknown-hitachi-hiuxwe2"); - exit (0); - } -EOF - $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` && - { echo "$SYSTEM_NAME"; exit; } - echo unknown-hitachi-hiuxwe2 - exit ;; - 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) - echo hppa1.1-hp-bsd - exit ;; - 9000/8??:4.3bsd:*:*) - echo hppa1.0-hp-bsd - exit ;; - *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*) - echo hppa1.0-hp-mpeix - exit ;; - hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) - echo hppa1.1-hp-osf - exit ;; - hp8??:OSF1:*:*) - echo hppa1.0-hp-osf - exit ;; - i*86:OSF1:*:*) - if [ -x /usr/sbin/sysversion ] ; then - echo ${UNAME_MACHINE}-unknown-osf1mk - else - echo ${UNAME_MACHINE}-unknown-osf1 - fi - exit ;; - parisc*:Lites*:*:*) - echo hppa1.1-hp-lites - exit ;; - C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) - echo c1-convex-bsd - exit ;; - C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) - if getsysinfo -f scalar_acc - then echo c32-convex-bsd - else echo c2-convex-bsd - fi - exit ;; - C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) - echo c34-convex-bsd - exit ;; - C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) - echo c38-convex-bsd - exit ;; - C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) - echo c4-convex-bsd - exit ;; - CRAY*Y-MP:*:*:*) - echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*[A-Z]90:*:*:*) - echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ - | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ - -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \ - -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*TS:*:*:*) - echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*T3E:*:*:*) - echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - CRAY*SV1:*:*:*) - echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - *:UNICOS/mp:*:*) - echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/' - exit ;; - F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*) - FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` - echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - 5000:UNIX_System_V:4.*:*) - FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'` - FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'` - echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" - exit ;; - i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*) - echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} - exit ;; - sparc*:BSD/OS:*:*) - echo sparc-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:BSD/OS:*:*) - echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE} - exit ;; - *:FreeBSD:*:*) - case ${UNAME_MACHINE} in - pc98) - echo i386-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - amd64) - echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - *) - echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;; - esac - exit ;; - i*:CYGWIN*:*) - echo ${UNAME_MACHINE}-pc-cygwin - exit ;; - i*:MINGW*:*) - echo ${UNAME_MACHINE}-pc-mingw32 - exit ;; - i*:windows32*:*) - # uname -m includes "-pc" on this system. - echo ${UNAME_MACHINE}-mingw32 - exit ;; - i*:PW*:*) - echo ${UNAME_MACHINE}-pc-pw32 - exit ;; - x86:Interix*:[3456]*) - echo i586-pc-interix${UNAME_RELEASE} - exit ;; - EM64T:Interix*:[3456]*) - echo x86_64-unknown-interix${UNAME_RELEASE} - exit ;; - [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*) - echo i${UNAME_MACHINE}-pc-mks - exit ;; - i*:Windows_NT*:* | Pentium*:Windows_NT*:*) - # How do we know it's Interix rather than the generic POSIX subsystem? - # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we - # UNAME_MACHINE based on the output of uname instead of i386? - echo i586-pc-interix - exit ;; - i*:UWIN*:*) - echo ${UNAME_MACHINE}-pc-uwin - exit ;; - amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*) - echo x86_64-unknown-cygwin - exit ;; - p*:CYGWIN*:*) - echo powerpcle-unknown-cygwin - exit ;; - prep*:SunOS:5.*:*) - echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` - exit ;; - *:GNU:*:*) - # the GNU system - echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` - exit ;; - *:GNU/*:*:*) - # other systems with GNU libc and userland - echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu - exit ;; - i*86:Minix:*:*) - echo ${UNAME_MACHINE}-pc-minix - exit ;; - arm*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - avr32*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - cris:Linux:*:*) - echo cris-axis-linux-gnu - exit ;; - crisv32:Linux:*:*) - echo crisv32-axis-linux-gnu - exit ;; - frv:Linux:*:*) - echo frv-unknown-linux-gnu - exit ;; - ia64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m32r*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - m68*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - mips:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #undef CPU - #undef mips - #undef mipsel - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=mipsel - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=mips - #else - CPU= - #endif - #endif -EOF - eval "`$CC_FOR_BUILD -E $dummy.c 2>/dev/null | sed -n ' - /^CPU/{ - s: ::g - p - }'`" - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } - ;; - mips64:Linux:*:*) - eval $set_cc_for_build - sed 's/^ //' << EOF >$dummy.c - #undef CPU - #undef mips64 - #undef mips64el - #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL) - CPU=mips64el - #else - #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB) - CPU=mips64 - #else - CPU= - #endif - #endif -EOF - eval "`$CC_FOR_BUILD -E $dummy.c 2>/dev/null | sed -n ' - /^CPU/{ - s: ::g - p - }'`" - test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; } - ;; - or32:Linux:*:*) - echo or32-unknown-linux-gnu - exit ;; - ppc:Linux:*:*) - echo powerpc-unknown-linux-gnu - exit ;; - ppc64:Linux:*:*) - echo powerpc64-unknown-linux-gnu - exit ;; - alpha:Linux:*:*) - case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in - EV5) UNAME_MACHINE=alphaev5 ;; - EV56) UNAME_MACHINE=alphaev56 ;; - PCA56) UNAME_MACHINE=alphapca56 ;; - PCA57) UNAME_MACHINE=alphapca56 ;; - EV6) UNAME_MACHINE=alphaev6 ;; - EV67) UNAME_MACHINE=alphaev67 ;; - EV68*) UNAME_MACHINE=alphaev68 ;; - esac - objdump --private-headers /bin/sh | grep ld.so.1 >/dev/null - if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi - echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} - exit ;; - parisc:Linux:*:* | hppa:Linux:*:*) - # Look for CPU level - case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in - PA7*) echo hppa1.1-unknown-linux-gnu ;; - PA8*) echo hppa2.0-unknown-linux-gnu ;; - *) echo hppa-unknown-linux-gnu ;; - esac - exit ;; - parisc64:Linux:*:* | hppa64:Linux:*:*) - echo hppa64-unknown-linux-gnu - exit ;; - s390:Linux:*:* | s390x:Linux:*:*) - echo ${UNAME_MACHINE}-ibm-linux - exit ;; - sh64*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sh*:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - sparc:Linux:*:* | sparc64:Linux:*:*) - echo ${UNAME_MACHINE}-unknown-linux-gnu - exit ;; - vax:Linux:*:*) - echo ${UNAME_MACHINE}-dec-linux-gnu - exit ;; - x86_64:Linux:*:*) - echo x86_64-unknown-linux-gnu - exit ;; - i*86:Linux:*:*) - # The BFD linker knows what the default object file format is, so - # first see if it will tell us. cd to the root directory to prevent - # problems with other programs or directories called `ld' in the path. - # Set LC_ALL=C to ensure ld outputs messages in English. - ld_supported_targets=`cd /; LC_ALL=C ld --help 2>&1 \ - | sed -ne '/supported targets:/!d - s/[ ][ ]*/ /g - s/.*supported targets: *// - s/ .*// - p'` - case "$ld_supported_targets" in - elf32-i386) - TENTATIVE="${UNAME_MACHINE}-pc-linux-gnu" - ;; - a.out-i386-linux) - echo "${UNAME_MACHINE}-pc-linux-gnuaout" - exit ;; 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Generated from configure.ac by autoheader. */ - -/* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP - systems. This function is required for `alloca.c' support on those systems. - */ -#undef CRAY_STACKSEG_END - -/* Define to 1 if using `alloca.c'. */ -#undef C_ALLOCA - -/* Define to 1 if you have `alloca', as a function or macro. */ -#undef HAVE_ALLOCA - -/* Define to 1 if you have and it should be used (not on Ultrix). - */ -#undef HAVE_ALLOCA_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_DLFCN_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_INTTYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_MEMORY_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDINT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STDLIB_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRINGS_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_STRING_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_STAT_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_SYS_TYPES_H - -/* Define to 1 if you have the header file. */ -#undef HAVE_UNISTD_H - -/* Define to the sub-directory in which libtool stores uninstalled libraries. - */ -#undef LT_OBJDIR - -/* Define to 1 if your C compiler doesn't accept -c and -o together. */ -#undef NO_MINUS_C_MINUS_O - -/* Name of package */ -#undef PACKAGE - -/* Define to the address where bug reports for this package should be sent. */ -#undef PACKAGE_BUGREPORT - -/* Define to the full name of this package. */ -#undef PACKAGE_NAME - -/* Define to the full name and version of this package. */ -#undef PACKAGE_STRING - -/* Define to the one symbol short name of this package. */ -#undef PACKAGE_TARNAME - -/* Define to the version of this package. */ -#undef PACKAGE_VERSION - -/* If using the C implementation of alloca, define if you know the - direction of stack growth for your system; otherwise it will be - automatically deduced at runtime. - STACK_DIRECTION > 0 => grows toward higher addresses - STACK_DIRECTION < 0 => grows toward lower addresses - STACK_DIRECTION = 0 => direction of growth unknown */ -#undef STACK_DIRECTION - -/* Define to 1 if you have the ANSI C header files. */ -#undef STDC_HEADERS - -/* Version number of package */ -#undef VERSION - -/* Define to `__inline__' or `__inline' if that's what the C compiler - calls it, or to nothing if 'inline' is not supported under any name. */ -#ifndef __cplusplus -#undef inline -#endif diff --git a/ExternalLibs/libvorbis-1.3.1/config.sub b/ExternalLibs/libvorbis-1.3.1/config.sub deleted file mode 100644 index 387c18d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/config.sub +++ /dev/null @@ -1,1608 +0,0 @@ -#! /bin/sh -# Configuration validation subroutine script. -# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, -# 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, -# Inc. - -timestamp='2006-07-02' - -# This file is (in principle) common to ALL GNU software. -# The presence of a machine in this file suggests that SOME GNU software -# can handle that machine. It does not imply ALL GNU software can. -# -# This file is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA -# 02110-1301, USA. -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - - -# Please send patches to . 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The user should be able to distinguish -# a failure to support a valid configuration from a meaningless -# configuration. - -# The goal of this file is to map all the various variations of a given -# machine specification into a single specification in the form: -# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM -# or in some cases, the newer four-part form: -# CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM -# It is wrong to echo any other type of specification. - -me=`echo "$0" | sed -e 's,.*/,,'` - -usage="\ -Usage: $0 [OPTION] CPU-MFR-OPSYS - $0 [OPTION] ALIAS - -Canonicalize a configuration name. - -Operation modes: - -h, --help print this help, then exit - -t, --time-stamp print date of last modification, then exit - -v, --version print version number, then exit - -Report bugs and patches to ." - -version="\ -GNU config.sub ($timestamp) - -Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 -Free Software Foundation, Inc. - -This is free software; see the source for copying conditions. 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"$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile" - rm -f "$tmpdepfile" - ;; - -none) - exec "$@" - ;; - -*) - echo "Unknown depmode $depmode" 1>&2 - exit 1 - ;; -esac - -exit 0 - -# Local Variables: -# mode: shell-script -# sh-indentation: 2 -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-end: "$" -# End: diff --git a/ExternalLibs/libvorbis-1.3.1/doc/01-introduction.tex b/ExternalLibs/libvorbis-1.3.1/doc/01-introduction.tex deleted file mode 100644 index 5c1772e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/01-introduction.tex +++ /dev/null @@ -1,529 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Introduction and Description} \label{vorbis:spec:intro} - -\subsection{Overview} - -This document provides a high level description of the Vorbis codec's -construction. A bit-by-bit specification appears beginning in -\xref{vorbis:spec:codec}. -The later sections assume a high-level -understanding of the Vorbis decode process, which is -provided here. - -\subsubsection{Application} -Vorbis is a general purpose perceptual audio CODEC intended to allow -maximum encoder flexibility, thus allowing it to scale competitively -over an exceptionally wide range of bitrates. At the high -quality/bitrate end of the scale (CD or DAT rate stereo, 16/24 bits) -it is in the same league as MPEG-2 and MPC. Similarly, the 1.0 -encoder can encode high-quality CD and DAT rate stereo at below 48kbps -without resampling to a lower rate. Vorbis is also intended for -lower and higher sample rates (from 8kHz telephony to 192kHz digital -masters) and a range of channel representations (monaural, -polyphonic, stereo, quadraphonic, 5.1, ambisonic, or up to 255 -discrete channels). - - -\subsubsection{Classification} -Vorbis I is a forward-adaptive monolithic transform CODEC based on the -Modified Discrete Cosine Transform. The codec is structured to allow -addition of a hybrid wavelet filterbank in Vorbis II to offer better -transient response and reproduction using a transform better suited to -localized time events. - - -\subsubsection{Assumptions} - -The Vorbis CODEC design assumes a complex, psychoacoustically-aware -encoder and simple, low-complexity decoder. Vorbis decode is -computationally simpler than mp3, although it does require more -working memory as Vorbis has no static probability model; the vector -codebooks used in the first stage of decoding from the bitstream are -packed in their entirety into the Vorbis bitstream headers. In -packed form, these codebooks occupy only a few kilobytes; the extent -to which they are pre-decoded into a cache is the dominant factor in -decoder memory usage. - - -Vorbis provides none of its own framing, synchronization or protection -against errors; it is solely a method of accepting input audio, -dividing it into individual frames and compressing these frames into -raw, unformatted 'packets'. The decoder then accepts these raw -packets in sequence, decodes them, synthesizes audio frames from -them, and reassembles the frames into a facsimile of the original -audio stream. Vorbis is a free-form variable bit rate (VBR) codec and packets have no -minimum size, maximum size, or fixed/expected size. Packets -are designed that they may be truncated (or padded) and remain -decodable; this is not to be considered an error condition and is used -extensively in bitrate management in peeling. Both the transport -mechanism and decoder must allow that a packet may be any size, or -end before or after packet decode expects. - -Vorbis packets are thus intended to be used with a transport mechanism -that provides free-form framing, sync, positioning and error correction -in accordance with these design assumptions, such as Ogg (for file -transport) or RTP (for network multicast). For purposes of a few -examples in this document, we will assume that Vorbis is to be -embedded in an Ogg stream specifically, although this is by no means a -requirement or fundamental assumption in the Vorbis design. - -The specification for embedding Vorbis into -an Ogg transport stream is in \xref{vorbis:over:ogg}. - - - -\subsubsection{Codec Setup and Probability Model} - -Vorbis' heritage is as a research CODEC and its current design -reflects a desire to allow multiple decades of continuous encoder -improvement before running out of room within the codec specification. -For these reasons, configurable aspects of codec setup intentionally -lean toward the extreme of forward adaptive. - -The single most controversial design decision in Vorbis (and the most -unusual for a Vorbis developer to keep in mind) is that the entire -probability model of the codec, the Huffman and VQ codebooks, is -packed into the bitstream header along with extensive CODEC setup -parameters (often several hundred fields). This makes it impossible, -as it would be with MPEG audio layers, to embed a simple frame type -flag in each audio packet, or begin decode at any frame in the stream -without having previously fetched the codec setup header. - - -\begin{note} -Vorbis \emph{can} initiate decode at any arbitrary packet within a -bitstream so long as the codec has been initialized/setup with the -setup headers. -\end{note} - -Thus, Vorbis headers are both required for decode to begin and -relatively large as bitstream headers go. The header size is -unbounded, although for streaming a rule-of-thumb of 4kB or less is -recommended (and Xiph.Org's Vorbis encoder follows this suggestion). - -Our own design work indicates the primary liability of the -required header is in mindshare; it is an unusual design and thus -causes some amount of complaint among engineers as this runs against -current design trends (and also points out limitations in some -existing software/interface designs, such as Windows' ACM codec -framework). However, we find that it does not fundamentally limit -Vorbis' suitable application space. - - -\subsubsection{Format Specification} -The Vorbis format is well-defined by its decode specification; any -encoder that produces packets that are correctly decoded by the -reference Vorbis decoder described below may be considered a proper -Vorbis encoder. A decoder must faithfully and completely implement -the specification defined below (except where noted) to be considered -a proper Vorbis decoder. - -\subsubsection{Hardware Profile} -Although Vorbis decode is computationally simple, it may still run -into specific limitations of an embedded design. For this reason, -embedded designs are allowed to deviate in limited ways from the -`full' decode specification yet still be certified compliant. These -optional omissions are labelled in the spec where relevant. - - -\subsection{Decoder Configuration} - -Decoder setup consists of configuration of multiple, self-contained -component abstractions that perform specific functions in the decode -pipeline. Each different component instance of a specific type is -semantically interchangeable; decoder configuration consists both of -internal component configuration, as well as arrangement of specific -instances into a decode pipeline. Componentry arrangement is roughly -as follows: - -\begin{center} -\includegraphics[width=\textwidth]{components} -\captionof{figure}{decoder pipeline configuration} -\end{center} - -\subsubsection{Global Config} -Global codec configuration consists of a few audio related fields -(sample rate, channels), Vorbis version (always '0' in Vorbis I), -bitrate hints, and the lists of component instances. All other -configuration is in the context of specific components. - -\subsubsection{Mode} - -Each Vorbis frame is coded according to a master 'mode'. A bitstream -may use one or many modes. - -The mode mechanism is used to encode a frame according to one of -multiple possible methods with the intention of choosing a method best -suited to that frame. Different modes are, e.g. how frame size -is changed from frame to frame. The mode number of a frame serves as a -top level configuration switch for all other specific aspects of frame -decode. - -A 'mode' configuration consists of a frame size setting, window type -(always 0, the Vorbis window, in Vorbis I), transform type (always -type 0, the MDCT, in Vorbis I) and a mapping number. The mapping -number specifies which mapping configuration instance to use for -low-level packet decode and synthesis. - - -\subsubsection{Mapping} - -A mapping contains a channel coupling description and a list of -'submaps' that bundle sets of channel vectors together for grouped -encoding and decoding. These submaps are not references to external -components; the submap list is internal and specific to a mapping. - -A 'submap' is a configuration/grouping that applies to a subset of -floor and residue vectors within a mapping. The submap functions as a -last layer of indirection such that specific special floor or residue -settings can be applied not only to all the vectors in a given mode, -but also specific vectors in a specific mode. Each submap specifies -the proper floor and residue instance number to use for decoding that -submap's spectral floor and spectral residue vectors. - -As an example: - -Assume a Vorbis stream that contains six channels in the standard 5.1 -format. The sixth channel, as is normal in 5.1, is bass only. -Therefore it would be wasteful to encode a full-spectrum version of it -as with the other channels. The submapping mechanism can be used to -apply a full range floor and residue encoding to channels 0 through 4, -and a bass-only representation to the bass channel, thus saving space. -In this example, channels 0-4 belong to submap 0 (which indicates use -of a full-range floor) and channel 5 belongs to submap 1, which uses a -bass-only representation. - - -\subsubsection{Floor} - -Vorbis encodes a spectral 'floor' vector for each PCM channel. This -vector is a low-resolution representation of the audio spectrum for -the given channel in the current frame, generally used akin to a -whitening filter. It is named a 'floor' because the Xiph.Org -reference encoder has historically used it as a unit-baseline for -spectral resolution. - -A floor encoding may be of two types. Floor 0 uses a packed LSP -representation on a dB amplitude scale and Bark frequency scale. -Floor 1 represents the curve as a piecewise linear interpolated -representation on a dB amplitude scale and linear frequency scale. -The two floors are semantically interchangeable in -encoding/decoding. However, floor type 1 provides more stable -inter-frame behavior, and so is the preferred choice in all -coupled-stereo and high bitrate modes. Floor 1 is also considerably -less expensive to decode than floor 0. - -Floor 0 is not to be considered deprecated, but it is of limited -modern use. No known Vorbis encoder past Xiph.org's own beta 4 makes -use of floor 0. - -The values coded/decoded by a floor are both compactly formatted and -make use of entropy coding to save space. For this reason, a floor -configuration generally refers to multiple codebooks in the codebook -component list. Entropy coding is thus provided as an abstraction, -and each floor instance may choose from any and all available -codebooks when coding/decoding. - - -\subsubsection{Residue} -The spectral residue is the fine structure of the audio spectrum -once the floor curve has been subtracted out. In simplest terms, it -is coded in the bitstream using cascaded (multi-pass) vector -quantization according to one of three specific packing/coding -algorithms numbered 0 through 2. The packing algorithm details are -configured by residue instance. As with the floor components, the -final VQ/entropy encoding is provided by external codebook instances -and each residue instance may choose from any and all available -codebooks. - -\subsubsection{Codebooks} - -Codebooks are a self-contained abstraction that perform entropy -decoding and, optionally, use the entropy-decoded integer value as an -offset into an index of output value vectors, returning the indicated -vector of values. - -The entropy coding in a Vorbis I codebook is provided by a standard -Huffman binary tree representation. This tree is tightly packed using -one of several methods, depending on whether codeword lengths are -ordered or unordered, or the tree is sparse. - -The codebook vector index is similarly packed according to index -characteristic. Most commonly, the vector index is encoded as a -single list of values of possible values that are then permuted into -a list of n-dimensional rows (lattice VQ). - - - -\subsection{High-level Decode Process} - -\subsubsection{Decode Setup} - -Before decoding can begin, a decoder must initialize using the -bitstream headers matching the stream to be decoded. Vorbis uses -three header packets; all are required, in-order, by this -specification. Once set up, decode may begin at any audio packet -belonging to the Vorbis stream. In Vorbis I, all packets after the -three initial headers are audio packets. - -The header packets are, in order, the identification -header, the comments header, and the setup header. - -\paragraph{Identification Header} -The identification header identifies the bitstream as Vorbis, Vorbis -version, and the simple audio characteristics of the stream such as -sample rate and number of channels. - -\paragraph{Comment Header} -The comment header includes user text comments (``tags'') and a vendor -string for the application/library that produced the bitstream. The -encoding and proper use of the comment header is described in \xref{vorbis:spec:comment}. - -\paragraph{Setup Header} -The setup header includes extensive CODEC setup information as well as -the complete VQ and Huffman codebooks needed for decode. - - -\subsubsection{Decode Procedure} - -The decoding and synthesis procedure for all audio packets is -fundamentally the same. -\begin{enumerate} -\item decode packet type flag -\item decode mode number -\item decode window shape (long windows only) -\item decode floor -\item decode residue into residue vectors -\item inverse channel coupling of residue vectors -\item generate floor curve from decoded floor data -\item compute dot product of floor and residue, producing audio spectrum vector -\item inverse monolithic transform of audio spectrum vector, always an MDCT in Vorbis I -\item overlap/add left-hand output of transform with right-hand output of previous frame -\item store right hand-data from transform of current frame for future lapping -\item if not first frame, return results of overlap/add as audio result of current frame -\end{enumerate} - -Note that clever rearrangement of the synthesis arithmetic is -possible; as an example, one can take advantage of symmetries in the -MDCT to store the right-hand transform data of a partial MDCT for a -50\% inter-frame buffer space savings, and then complete the transform -later before overlap/add with the next frame. This optimization -produces entirely equivalent output and is naturally perfectly legal. -The decoder must be \emph{entirely mathematically equivalent} to the -specification, it need not be a literal semantic implementation. - -\paragraph{Packet type decode} - -Vorbis I uses four packet types. The first three packet types mark each -of the three Vorbis headers described above. The fourth packet type -marks an audio packet. All other packet types are reserved; packets -marked with a reserved type should be ignored. - -Following the three header packets, all packets in a Vorbis I stream -are audio. The first step of audio packet decode is to read and -verify the packet type; \emph{a non-audio packet when audio is expected -indicates stream corruption or a non-compliant stream. The decoder -must ignore the packet and not attempt decoding it to -audio}. - - - - -\paragraph{Mode decode} -Vorbis allows an encoder to set up multiple, numbered packet 'modes', -as described earlier, all of which may be used in a given Vorbis -stream. The mode is encoded as an integer used as a direct offset into -the mode instance index. - - -\paragraph{Window shape decode (long windows only)} \label{vorbis:spec:window} - -Vorbis frames may be one of two PCM sample sizes specified during -codec setup. In Vorbis I, legal frame sizes are powers of two from 64 -to 8192 samples. Aside from coupling, Vorbis handles channels as -independent vectors and these frame sizes are in samples per channel. - -Vorbis uses an overlapping transform, namely the MDCT, to blend one -frame into the next, avoiding most inter-frame block boundary -artifacts. The MDCT output of one frame is windowed according to MDCT -requirements, overlapped 50\% with the output of the previous frame and -added. The window shape assures seamless reconstruction. - -This is easy to visualize in the case of equal sized-windows: - -\begin{center} -\includegraphics[width=\textwidth]{window1} -\captionof{figure}{overlap of two equal-sized windows} -\end{center} - -And slightly more complex in the case of overlapping unequal sized -windows: - -\begin{center} -\includegraphics[width=\textwidth]{window2} -\captionof{figure}{overlap of a long and a short window} -\end{center} - -In the unequal-sized window case, the window shape of the long window -must be modified for seamless lapping as above. It is possible to -correctly infer window shape to be applied to the current window from -knowing the sizes of the current, previous and next window. It is -legal for a decoder to use this method. However, in the case of a long -window (short windows require no modification), Vorbis also codes two -flag bits to specify pre- and post- window shape. Although not -strictly necessary for function, this minor redundancy allows a packet -to be fully decoded to the point of lapping entirely independently of -any other packet, allowing easier abstraction of decode layers as well -as allowing a greater level of easy parallelism in encode and -decode. - -A description of valid window functions for use with an inverse MDCT -can be found in \cite{Sporer/Brandenburg/Edler}. Vorbis windows -all use the slope function -\[ y = \sin(.5*\pi \, \sin^2((x+.5)/n*\pi)) . \] - - - -\paragraph{floor decode} -Each floor is encoded/decoded in channel order, however each floor -belongs to a 'submap' that specifies which floor configuration to -use. All floors are decoded before residue decode begins. - - -\paragraph{residue decode} - -Although the number of residue vectors equals the number of channels, -channel coupling may mean that the raw residue vectors extracted -during decode do not map directly to specific channels. When channel -coupling is in use, some vectors will correspond to coupled magnitude -or angle. The coupling relationships are described in the codec setup -and may differ from frame to frame, due to different mode numbers. - -Vorbis codes residue vectors in groups by submap; the coding is done -in submap order from submap 0 through n-1. This differs from floors -which are coded using a configuration provided by submap number, but -are coded individually in channel order. - - - -\paragraph{inverse channel coupling} - -A detailed discussion of stereo in the Vorbis codec can be found in -the document \href{stereo.html}{Stereo Channel Coupling in the -Vorbis CODEC}. Vorbis is not limited to only stereo coupling, but -the stereo document also gives a good overview of the generic coupling -mechanism. - -Vorbis coupling applies to pairs of residue vectors at a time; -decoupling is done in-place a pair at a time in the order and using -the vectors specified in the current mapping configuration. The -decoupling operation is the same for all pairs, converting square -polar representation (where one vector is magnitude and the second -angle) back to Cartesian representation. - -After decoupling, in order, each pair of vectors on the coupling list, -the resulting residue vectors represent the fine spectral detail -of each output channel. - - - -\paragraph{generate floor curve} - -The decoder may choose to generate the floor curve at any appropriate -time. It is reasonable to generate the output curve when the floor -data is decoded from the raw packet, or it can be generated after -inverse coupling and applied to the spectral residue directly, -combining generation and the dot product into one step and eliminating -some working space. - -Both floor 0 and floor 1 generate a linear-range, linear-domain output -vector to be multiplied (dot product) by the linear-range, -linear-domain spectral residue. - - - -\paragraph{compute floor/residue dot product} - -This step is straightforward; for each output channel, the decoder -multiplies the floor curve and residue vectors element by element, -producing the finished audio spectrum of each channel. - -% TODO/FIXME: The following two paragraphs have identical twins -% in section 4 (under "dot product") -One point is worth mentioning about this dot product; a common mistake -in a fixed point implementation might be to assume that a 32 bit -fixed-point representation for floor and residue and direct -multiplication of the vectors is sufficient for acceptable spectral -depth in all cases because it happens to mostly work with the current -Xiph.Org reference encoder. - -However, floor vector values can span \~{}140dB (\~{}24 bits unsigned), and -the audio spectrum vector should represent a minimum of 120dB (\~{}21 -bits with sign), even when output is to a 16 bit PCM device. For the -residue vector to represent full scale if the floor is nailed to -$-140$dB, it must be able to span 0 to $+140$dB. For the residue vector -to reach full scale if the floor is nailed at 0dB, it must be able to -represent $-140$dB to $+0$dB. Thus, in order to handle full range -dynamics, a residue vector may span $-140$dB to $+140$dB entirely within -spec. A 280dB range is approximately 48 bits with sign; thus the -residue vector must be able to represent a 48 bit range and the dot -product must be able to handle an effective 48 bit times 24 bit -multiplication. This range may be achieved using large (64 bit or -larger) integers, or implementing a movable binary point -representation. - - - -\paragraph{inverse monolithic transform (MDCT)} - -The audio spectrum is converted back into time domain PCM audio via an -inverse Modified Discrete Cosine Transform (MDCT). A detailed -description of the MDCT is available in \cite{Sporer/Brandenburg/Edler}. - -Note that the PCM produced directly from the MDCT is not yet finished -audio; it must be lapped with surrounding frames using an appropriate -window (such as the Vorbis window) before the MDCT can be considered -orthogonal. - - - -\paragraph{overlap/add data} -Windowed MDCT output is overlapped and added with the right hand data -of the previous window such that the 3/4 point of the previous window -is aligned with the 1/4 point of the current window (as illustrated in -the window overlap diagram). At this point, the audio data between the -center of the previous frame and the center of the current frame is -now finished and ready to be returned. - - -\paragraph{cache right hand data} -The decoder must cache the right hand portion of the current frame to -be lapped with the left hand portion of the next frame. - - - -\paragraph{return finished audio data} - -The overlapped portion produced from overlapping the previous and -current frame data is finished data to be returned by the decoder. -This data spans from the center of the previous window to the center -of the current window. In the case of same-sized windows, the amount -of data to return is one-half block consisting of and only of the -overlapped portions. When overlapping a short and long window, much of -the returned range is not actually overlap. This does not damage -transform orthogonality. Pay attention however to returning the -correct data range; the amount of data to be returned is: - -\begin{Verbatim}[commandchars=\\\{\}] -window_blocksize(previous_window)/4+window_blocksize(current_window)/4 -\end{Verbatim} - -from the center of the previous window to the center of the current -window. - -Data is not returned from the first frame; it must be used to 'prime' -the decode engine. The encoder accounts for this priming when -calculating PCM offsets; after the first frame, the proper PCM output -offset is '0' (as no data has been returned yet). diff --git a/ExternalLibs/libvorbis-1.3.1/doc/02-bitpacking.tex b/ExternalLibs/libvorbis-1.3.1/doc/02-bitpacking.tex deleted file mode 100644 index c9a9fef..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/02-bitpacking.tex +++ /dev/null @@ -1,247 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Bitpacking Convention} \label{vorbis:spec:bitpacking} - -\subsection{Overview} - -The Vorbis codec uses relatively unstructured raw packets containing -arbitrary-width binary integer fields. Logically, these packets are a -bitstream in which bits are coded one-by-one by the encoder and then -read one-by-one in the same monotonically increasing order by the -decoder. Most current binary storage arrangements group bits into a -native word size of eight bits (octets), sixteen bits, thirty-two bits -or, less commonly other fixed word sizes. The Vorbis bitpacking -convention specifies the correct mapping of the logical packet -bitstream into an actual representation in fixed-width words. - - -\subsubsection{octets, bytes and words} - -In most contemporary architectures, a 'byte' is synonymous with an -'octet', that is, eight bits. This has not always been the case; -seven, ten, eleven and sixteen bit 'bytes' have been used. For -purposes of the bitpacking convention, a byte implies the native, -smallest integer storage representation offered by a platform. On -modern platforms, this is generally assumed to be eight bits (not -necessarily because of the processor but because of the -filesystem/memory architecture. Modern filesystems invariably offer -bytes as the fundamental atom of storage). A 'word' is an integer -size that is a grouped multiple of this smallest size. - -The most ubiquitous architectures today consider a 'byte' to be an -octet (eight bits) and a word to be a group of two, four or eight -bytes (16, 32 or 64 bits). Note however that the Vorbis bitpacking -convention is still well defined for any native byte size; Vorbis uses -the native bit-width of a given storage system. This document assumes -that a byte is one octet for purposes of example. - -\subsubsection{bit order} - -A byte has a well-defined 'least significant' bit (LSb), which is the -only bit set when the byte is storing the two's complement integer -value +1. A byte's 'most significant' bit (MSb) is at the opposite -end of the byte. Bits in a byte are numbered from zero at the LSb to -$n$ ($n=7$ in an octet) for the -MSb. - - - -\subsubsection{byte order} - -Words are native groupings of multiple bytes. Several byte orderings -are possible in a word; the common ones are 3-2-1-0 ('big endian' or -'most significant byte first' in which the highest-valued byte comes -first), 0-1-2-3 ('little endian' or 'least significant byte first' in -which the lowest value byte comes first) and less commonly 3-1-2-0 and -0-2-1-3 ('mixed endian'). - -The Vorbis bitpacking convention specifies storage and bitstream -manipulation at the byte, not word, level, thus host word ordering is -of a concern only during optimization when writing high performance -code that operates on a word of storage at a time rather than by byte. -Logically, bytes are always coded and decoded in order from byte zero -through byte $n$. - - - -\subsubsection{coding bits into byte sequences} - -The Vorbis codec has need to code arbitrary bit-width integers, from -zero to 32 bits wide, into packets. These integer fields are not -aligned to the boundaries of the byte representation; the next field -is written at the bit position at which the previous field ends. - -The encoder logically packs integers by writing the LSb of a binary -integer to the logical bitstream first, followed by next least -significant bit, etc, until the requested number of bits have been -coded. When packing the bits into bytes, the encoder begins by -placing the LSb of the integer to be written into the least -significant unused bit position of the destination byte, followed by -the next-least significant bit of the source integer and so on up to -the requested number of bits. When all bits of the destination byte -have been filled, encoding continues by zeroing all bits of the next -byte and writing the next bit into the bit position 0 of that byte. -Decoding follows the same process as encoding, but by reading bits -from the byte stream and reassembling them into integers. - - - -\subsubsection{signedness} - -The signedness of a specific number resulting from decode is to be -interpreted by the decoder given decode context. That is, the three -bit binary pattern 'b111' can be taken to represent either 'seven' as -an unsigned integer, or '-1' as a signed, two's complement integer. -The encoder and decoder are responsible for knowing if fields are to -be treated as signed or unsigned. - - - -\subsubsection{coding example} - -Code the 4 bit integer value '12' [b1100] into an empty bytestream. -Bytestream result: - -\begin{Verbatim}[commandchars=\\\{\}] - | - V - - 7 6 5 4 3 2 1 0 -byte 0 [0 0 0 0 1 1 0 0] <- -byte 1 [ ] -byte 2 [ ] -byte 3 [ ] - ... -byte n [ ] bytestream length == 1 byte - -\end{Verbatim} - - -Continue by coding the 3 bit integer value '-1' [b111]: - -\begin{Verbatim}[commandchars=\\\{\}] - | - V - - 7 6 5 4 3 2 1 0 -byte 0 [0 1 1 1 1 1 0 0] <- -byte 1 [ ] -byte 2 [ ] -byte 3 [ ] - ... -byte n [ ] bytestream length == 1 byte -\end{Verbatim} - - -Continue by coding the 7 bit integer value '17' [b0010001]: - -\begin{Verbatim}[commandchars=\\\{\}] - | - V - - 7 6 5 4 3 2 1 0 -byte 0 [1 1 1 1 1 1 0 0] -byte 1 [0 0 0 0 1 0 0 0] <- -byte 2 [ ] -byte 3 [ ] - ... -byte n [ ] bytestream length == 2 bytes - bit cursor == 6 -\end{Verbatim} - - -Continue by coding the 13 bit integer value '6969' [b110 11001110 01]: - -\begin{Verbatim}[commandchars=\\\{\}] - | - V - - 7 6 5 4 3 2 1 0 -byte 0 [1 1 1 1 1 1 0 0] -byte 1 [0 1 0 0 1 0 0 0] -byte 2 [1 1 0 0 1 1 1 0] -byte 3 [0 0 0 0 0 1 1 0] <- - ... -byte n [ ] bytestream length == 4 bytes - -\end{Verbatim} - - - - -\subsubsection{decoding example} - -Reading from the beginning of the bytestream encoded in the above example: - -\begin{Verbatim}[commandchars=\\\{\}] - | - V - - 7 6 5 4 3 2 1 0 -byte 0 [1 1 1 1 1 1 0 0] <- -byte 1 [0 1 0 0 1 0 0 0] -byte 2 [1 1 0 0 1 1 1 0] -byte 3 [0 0 0 0 0 1 1 0] bytestream length == 4 bytes - -\end{Verbatim} - - -We read two, two-bit integer fields, resulting in the returned numbers -'b00' and 'b11'. Two things are worth noting here: - -\begin{itemize} -\item Although these four bits were originally written as a single -four-bit integer, reading some other combination of bit-widths from the -bitstream is well defined. There are no artificial alignment -boundaries maintained in the bitstream. - -\item The second value is the -two-bit-wide integer 'b11'. This value may be interpreted either as -the unsigned value '3', or the signed value '-1'. Signedness is -dependent on decode context. -\end{itemize} - - - - -\subsubsection{end-of-packet alignment} - -The typical use of bitpacking is to produce many independent -byte-aligned packets which are embedded into a larger byte-aligned -container structure, such as an Ogg transport bitstream. Externally, -each bytestream (encoded bitstream) must begin and end on a byte -boundary. Often, the encoded bitstream is not an integer number of -bytes, and so there is unused (uncoded) space in the last byte of a -packet. - -Unused space in the last byte of a bytestream is always zeroed during -the coding process. Thus, should this unused space be read, it will -return binary zeroes. - -Attempting to read past the end of an encoded packet results in an -'end-of-packet' condition. End-of-packet is not to be considered an -error; it is merely a state indicating that there is insufficient -remaining data to fulfill the desired read size. Vorbis uses truncated -packets as a normal mode of operation, and as such, decoders must -handle reading past the end of a packet as a typical mode of -operation. Any further read operations after an 'end-of-packet' -condition shall also return 'end-of-packet'. - - - -\subsubsection{reading zero bits} - -Reading a zero-bit-wide integer returns the value '0' and does not -increment the stream cursor. Reading to the end of the packet (but -not past, such that an 'end-of-packet' condition has not triggered) -and then reading a zero bit integer shall succeed, returning 0, and -not trigger an end-of-packet condition. Reading a zero-bit-wide -integer after a previous read sets 'end-of-packet' shall also fail -with 'end-of-packet'. - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/03-codebook.tex b/ExternalLibs/libvorbis-1.3.1/doc/03-codebook.tex deleted file mode 100644 index 987b436..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/03-codebook.tex +++ /dev/null @@ -1,406 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Probability Model and Codebooks} \label{vorbis:spec:codebook} - -\subsection{Overview} - -Unlike practically every other mainstream audio codec, Vorbis has no -statically configured probability model, instead packing all entropy -decoding configuration, VQ and Huffman, into the bitstream itself in -the third header, the codec setup header. This packed configuration -consists of multiple 'codebooks', each containing a specific -Huffman-equivalent representation for decoding compressed codewords as -well as an optional lookup table of output vector values to which a -decoded Huffman value is applied as an offset, generating the final -decoded output corresponding to a given compressed codeword. - -\subsubsection{Bitwise operation} -The codebook mechanism is built on top of the vorbis bitpacker. Both -the codebooks themselves and the codewords they decode are unrolled -from a packet as a series of arbitrary-width values read from the -stream according to \xref{vorbis:spec:bitpacking}. - - - - -\subsection{Packed codebook format} - -For purposes of the examples below, we assume that the storage -system's native byte width is eight bits. This is not universally -true; see \xref{vorbis:spec:bitpacking} for discussion -relating to non-eight-bit bytes. - -\subsubsection{codebook decode} - -A codebook begins with a 24 bit sync pattern, 0x564342: - -\begin{Verbatim}[commandchars=\\\{\}] -byte 0: [ 0 1 0 0 0 0 1 0 ] (0x42) -byte 1: [ 0 1 0 0 0 0 1 1 ] (0x43) -byte 2: [ 0 1 0 1 0 1 1 0 ] (0x56) -\end{Verbatim} - -16 bit \varname{[codebook_dimensions]} and 24 bit \varname{[codebook_entries]} fields: - -\begin{Verbatim}[commandchars=\\\{\}] - -byte 3: [ X X X X X X X X ] -byte 4: [ X X X X X X X X ] [codebook_dimensions] (16 bit unsigned) - -byte 5: [ X X X X X X X X ] -byte 6: [ X X X X X X X X ] -byte 7: [ X X X X X X X X ] [codebook_entries] (24 bit unsigned) - -\end{Verbatim} - -Next is the \varname{[ordered]} bit flag: - -\begin{Verbatim}[commandchars=\\\{\}] - -byte 8: [ X ] [ordered] (1 bit) - -\end{Verbatim} - -Each entry, numbering a -total of \varname{[codebook_entries]}, is assigned a codeword length. -We now read the list of codeword lengths and store these lengths in -the array \varname{[codebook_codeword_lengths]}. Decode of lengths is -according to whether the \varname{[ordered]} flag is set or unset. - -\begin{itemize} -\item - If the \varname{[ordered]} flag is unset, the codeword list is not - length ordered and the decoder needs to read each codeword length - one-by-one. - - The decoder first reads one additional bit flag, the - \varname{[sparse]} flag. This flag determines whether or not the - codebook contains unused entries that are not to be included in the - codeword decode tree: - -\begin{Verbatim}[commandchars=\\\{\}] -byte 8: [ X 1 ] [sparse] flag (1 bit) -\end{Verbatim} - - The decoder now performs for each of the \varname{[codebook_entries]} - codebook entries: - -\begin{Verbatim}[commandchars=\\\{\}] - - 1) if([sparse] is set) \{ - - 2) [flag] = read one bit; - 3) if([flag] is set) \{ - - 4) [length] = read a five bit unsigned integer; - 5) codeword length for this entry is [length]+1; - - \} else \{ - - 6) this entry is unused. mark it as such. - - \} - - \} else the sparse flag is not set \{ - - 7) [length] = read a five bit unsigned integer; - 8) the codeword length for this entry is [length]+1; - - \} - -\end{Verbatim} - -\item - If the \varname{[ordered]} flag is set, the codeword list for this - codebook is encoded in ascending length order. Rather than reading - a length for every codeword, the encoder reads the number of - codewords per length. That is, beginning at entry zero: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [current_entry] = 0; - 2) [current_length] = read a five bit unsigned integer and add 1; - 3) [number] = read \link{vorbis:spec:ilog}{ilog}([codebook_entries] - [current_entry]) bits as an unsigned integer - 4) set the entries [current_entry] through [current_entry]+[number]-1, inclusive, - of the [codebook_codeword_lengths] array to [current_length] - 5) set [current_entry] to [number] + [current_entry] - 6) increment [current_length] by 1 - 7) if [current_entry] is greater than [codebook_entries] ERROR CONDITION; - the decoder will not be able to read this stream. - 8) if [current_entry] is less than [codebook_entries], repeat process starting at 3) - 9) done. -\end{Verbatim} - -\end{itemize} - -After all codeword lengths have been decoded, the decoder reads the -vector lookup table. Vorbis I supports three lookup types: -\begin{enumerate} -\item -No lookup -\item -Implicitly populated value mapping (lattice VQ) -\item -Explicitly populated value mapping (tessellated or 'foam' -VQ) -\end{enumerate} - - -The lookup table type is read as a four bit unsigned integer: -\begin{Verbatim}[commandchars=\\\{\}] - 1) [codebook_lookup_type] = read four bits as an unsigned integer -\end{Verbatim} - -Codebook decode precedes according to \varname{[codebook_lookup_type]}: -\begin{itemize} -\item -Lookup type zero indicates no lookup to be read. Proceed past -lookup decode. -\item -Lookup types one and two are similar, differing only in the -number of lookup values to be read. Lookup type one reads a list of -values that are permuted in a set pattern to build a list of vectors, -each vector of order \varname{[codebook_dimensions]} scalars. Lookup -type two builds the same vector list, but reads each scalar for each -vector explicitly, rather than building vectors from a smaller list of -possible scalar values. Lookup decode proceeds as follows: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [codebook_minimum_value] = \link{vorbis:spec:float32:unpack}{float32_unpack}( read 32 bits as an unsigned integer) - 2) [codebook_delta_value] = \link{vorbis:spec:float32:unpack}{float32_unpack}( read 32 bits as an unsigned integer) - 3) [codebook_value_bits] = read 4 bits as an unsigned integer and add 1 - 4) [codebook_sequence_p] = read 1 bit as a boolean flag - - if ( [codebook_lookup_type] is 1 ) \{ - - 5) [codebook_lookup_values] = \link{vorbis:spec:lookup1:values}{lookup1_values}(\varname{[codebook_entries]}, \varname{[codebook_dimensions]} ) - - \} else \{ - - 6) [codebook_lookup_values] = \varname{[codebook_entries]} * \varname{[codebook_dimensions]} - - \} - - 7) read a total of [codebook_lookup_values] unsigned integers of [codebook_value_bits] each; - store these in order in the array [codebook_multiplicands] -\end{Verbatim} -\item -A \varname{[codebook_lookup_type]} of greater than two is reserved -and indicates a stream that is not decodable by the specification in this -document. - -\end{itemize} - - -An 'end of packet' during any read operation in the above steps is -considered an error condition rendering the stream undecodable. - -\paragraph{Huffman decision tree representation} - -The \varname{[codebook_codeword_lengths]} array and -\varname{[codebook_entries]} value uniquely define the Huffman decision -tree used for entropy decoding. - -Briefly, each used codebook entry (recall that length-unordered -codebooks support unused codeword entries) is assigned, in order, the -lowest valued unused binary Huffman codeword possible. Assume the -following codeword length list: - -\begin{Verbatim}[commandchars=\\\{\}] -entry 0: length 2 -entry 1: length 4 -entry 2: length 4 -entry 3: length 4 -entry 4: length 4 -entry 5: length 2 -entry 6: length 3 -entry 7: length 3 -\end{Verbatim} - -Assigning codewords in order (lowest possible value of the appropriate -length to highest) results in the following codeword list: - -\begin{Verbatim}[commandchars=\\\{\}] -entry 0: length 2 codeword 00 -entry 1: length 4 codeword 0100 -entry 2: length 4 codeword 0101 -entry 3: length 4 codeword 0110 -entry 4: length 4 codeword 0111 -entry 5: length 2 codeword 10 -entry 6: length 3 codeword 110 -entry 7: length 3 codeword 111 -\end{Verbatim} - - -\begin{note} -Unlike most binary numerical values in this document, we -intend the above codewords to be read and used bit by bit from left to -right, thus the codeword '001' is the bit string 'zero, zero, one'. -When determining 'lowest possible value' in the assignment definition -above, the leftmost bit is the MSb. -\end{note} - -It is clear that the codeword length list represents a Huffman -decision tree with the entry numbers equivalent to the leaves numbered -left-to-right: - -\begin{center} -\includegraphics[width=10cm]{hufftree} -\captionof{figure}{huffman tree illustration} -\end{center} - - -As we assign codewords in order, we see that each choice constructs a -new leaf in the leftmost possible position. - -Note that it's possible to underspecify or overspecify a Huffman tree -via the length list. In the above example, if codeword seven were -eliminated, it's clear that the tree is unfinished: - -\begin{center} -\includegraphics[width=10cm]{hufftree-under} -\captionof{figure}{underspecified huffman tree illustration} -\end{center} - - -Similarly, in the original codebook, it's clear that the tree is fully -populated and a ninth codeword is impossible. Both underspecified and -overspecified trees are an error condition rendering the stream -undecodable. Take special care that a codebook with a single used -entry is handled properly; it consists of a single codework of zero -bits and 'reading' a value out of such a codebook always returns the -single used value and sinks zero bits. - -Codebook entries marked 'unused' are simply skipped in the assigning -process. They have no codeword and do not appear in the decision -tree, thus it's impossible for any bit pattern read from the stream to -decode to that entry number. - - - -\paragraph{VQ lookup table vector representation} - -Unpacking the VQ lookup table vectors relies on the following values: -\begin{programlisting} -the [codebook_multiplicands] array -[codebook_minimum_value] -[codebook_delta_value] -[codebook_sequence_p] -[codebook_lookup_type] -[codebook_entries] -[codebook_dimensions] -[codebook_lookup_values] -\end{programlisting} - -\bigskip - -Decoding (unpacking) a specific vector in the vector lookup table -proceeds according to \varname{[codebook_lookup_type]}. The unpacked -vector values are what a codebook would return during audio packet -decode in a VQ context. - -\paragraph{Vector value decode: Lookup type 1} - -Lookup type one specifies a lattice VQ lookup table built -algorithmically from a list of scalar values. Calculate (unpack) the -final values of a codebook entry vector from the entries in -\varname{[codebook_multiplicands]} as follows (\varname{[value_vector]} -is the output vector representing the vector of values for entry number -\varname{[lookup_offset]} in this codebook): - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [last] = 0; - 2) [index_divisor] = 1; - 3) iterate [i] over the range 0 ... [codebook_dimensions]-1 (once for each scalar value in the value vector) \{ - - 4) [multiplicand_offset] = ( [lookup_offset] divided by [index_divisor] using integer - division ) integer modulo [codebook_lookup_values] - - 5) vector [value_vector] element [i] = - ( [codebook_multiplicands] array element number [multiplicand_offset] ) * - [codebook_delta_value] + [codebook_minimum_value] + [last]; - - 6) if ( [codebook_sequence_p] is set ) then set [last] = vector [value_vector] element [i] - - 7) [index_divisor] = [index_divisor] * [codebook_lookup_values] - - \} - - 8) vector calculation completed. -\end{Verbatim} - - - -\paragraph{Vector value decode: Lookup type 2} - -Lookup type two specifies a VQ lookup table in which each scalar in -each vector is explicitly set by the \varname{[codebook_multiplicands]} -array in a one-to-one mapping. Calculate [unpack] the -final values of a codebook entry vector from the entries in -\varname{[codebook_multiplicands]} as follows (\varname{[value_vector]} -is the output vector representing the vector of values for entry number -\varname{[lookup_offset]} in this codebook): - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [last] = 0; - 2) [multiplicand_offset] = [lookup_offset] * [codebook_dimensions] - 3) iterate [i] over the range 0 ... [codebook_dimensions]-1 (once for each scalar value in the value vector) \{ - - 4) vector [value_vector] element [i] = - ( [codebook_multiplicands] array element number [multiplicand_offset] ) * - [codebook_delta_value] + [codebook_minimum_value] + [last]; - - 5) if ( [codebook_sequence_p] is set ) then set [last] = vector [value_vector] element [i] - - 6) increment [multiplicand_offset] - - \} - - 7) vector calculation completed. -\end{Verbatim} - - - - - - - - - -\subsection{Use of the codebook abstraction} - -The decoder uses the codebook abstraction much as it does the -bit-unpacking convention; a specific codebook reads a -codeword from the bitstream, decoding it into an entry number, and then -returns that entry number to the decoder (when used in a scalar -entropy coding context), or uses that entry number as an offset into -the VQ lookup table, returning a vector of values (when used in a context -desiring a VQ value). Scalar or VQ context is always explicit; any call -to the codebook mechanism requests either a scalar entry number or a -lookup vector. - -Note that VQ lookup type zero indicates that there is no lookup table; -requesting decode using a codebook of lookup type 0 in any context -expecting a vector return value (even in a case where a vector of -dimension one) is forbidden. If decoder setup or decode requests such -an action, that is an error condition rendering the packet -undecodable. - -Using a codebook to read from the packet bitstream consists first of -reading and decoding the next codeword in the bitstream. The decoder -reads bits until the accumulated bits match a codeword in the -codebook. This process can be though of as logically walking the -Huffman decode tree by reading one bit at a time from the bitstream, -and using the bit as a decision boolean to take the 0 branch (left in -the above examples) or the 1 branch (right in the above examples). -Walking the tree finishes when the decode process hits a leaf in the -decision tree; the result is the entry number corresponding to that -leaf. Reading past the end of a packet propagates the 'end-of-stream' -condition to the decoder. - -When used in a scalar context, the resulting codeword entry is the -desired return value. - -When used in a VQ context, the codeword entry number is used as an -offset into the VQ lookup table. The value returned to the decoder is -the vector of scalars corresponding to this offset. diff --git a/ExternalLibs/libvorbis-1.3.1/doc/04-codec.tex b/ExternalLibs/libvorbis-1.3.1/doc/04-codec.tex deleted file mode 100644 index 035496f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/04-codec.tex +++ /dev/null @@ -1,661 +0,0 @@ - -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Codec Setup and Packet Decode} \label{vorbis:spec:codec} - -\subsection{Overview} - -This document serves as the top-level reference document for the -bit-by-bit decode specification of Vorbis I. This document assumes a -high-level understanding of the Vorbis decode process, which is -provided in \xref{vorbis:spec:intro}. \xref{vorbis:spec:bitpacking} covers reading and writing bit fields from -and to bitstream packets. - - - -\subsection{Header decode and decode setup} - -A Vorbis bitstream begins with three header packets. The header -packets are, in order, the identification header, the comments header, -and the setup header. All are required for decode compliance. An -end-of-packet condition during decoding the first or third header -packet renders the stream undecodable. End-of-packet decoding the -comment header is a non-fatal error condition. - -\subsubsection{Common header decode} - -Each header packet begins with the same header fields. - - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [packet_type] : 8 bit value - 2) 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73: the characters 'v','o','r','b','i','s' as six octets -\end{Verbatim} - -Decode continues according to packet type; the identification header -is type 1, the comment header type 3 and the setup header type 5 -(these types are all odd as a packet with a leading single bit of '0' -is an audio packet). The packets must occur in the order of -identification, comment, setup. - - - -\subsubsection{Identification header} - -The identification header is a short header of only a few fields used -to declare the stream definitively as Vorbis, and provide a few externally -relevant pieces of information about the audio stream. The -identification header is coded as follows: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [vorbis_version] = read 32 bits as unsigned integer - 2) [audio_channels] = read 8 bit integer as unsigned - 3) [audio_sample_rate] = read 32 bits as unsigned integer - 4) [bitrate_maximum] = read 32 bits as signed integer - 5) [bitrate_nominal] = read 32 bits as signed integer - 6) [bitrate_minimum] = read 32 bits as signed integer - 7) [blocksize_0] = 2 exponent (read 4 bits as unsigned integer) - 8) [blocksize_1] = 2 exponent (read 4 bits as unsigned integer) - 9) [framing_flag] = read one bit -\end{Verbatim} - -\varname{[vorbis_version]} is to read '0' in order to be compatible -with this document. Both \varname{[audio_channels]} and -\varname{[audio_sample_rate]} must read greater than zero. Allowed final -blocksize values are 64, 128, 256, 512, 1024, 2048, 4096 and 8192 in -Vorbis I. \varname{[blocksize_0]} must be less than or equal to -\varname{[blocksize_1]}. The framing bit must be nonzero. Failure to -meet any of these conditions renders a stream undecodable. - -The bitrate fields above are used only as hints. The nominal bitrate -field especially may be considerably off in purely VBR streams. The -fields are meaningful only when greater than zero. - -\begin{itemize} - \item All three fields set to the same value implies a fixed rate, or tightly bounded, nearly fixed-rate bitstream - \item Only nominal set implies a VBR or ABR stream that averages the nominal bitrate - \item Maximum and or minimum set implies a VBR bitstream that obeys the bitrate limits - \item None set indicates the encoder does not care to speculate. -\end{itemize} - - - - -\subsubsection{Comment header} -Comment header decode and data specification is covered in -\xref{vorbis:spec:comment}. - - -\subsubsection{Setup header} - -Vorbis codec setup is configurable to an extreme degree: - -\begin{center} -\includegraphics[width=\textwidth]{components} -\captionof{figure}{decoder pipeline configuration} -\end{center} - - -The setup header contains the bulk of the codec setup information -needed for decode. The setup header contains, in order, the lists of -codebook configurations, time-domain transform configurations -(placeholders in Vorbis I), floor configurations, residue -configurations, channel mapping configurations and mode -configurations. It finishes with a framing bit of '1'. Header decode -proceeds in the following order: - -\paragraph{Codebooks} - -\begin{enumerate} -\item \varname{[vorbis_codebook_count]} = read eight bits as unsigned integer and add one -\item Decode \varname{[vorbis_codebook_count]} codebooks in order as defined -in \xref{vorbis:spec:codebook}. Save each configuration, in -order, in an array of -codebook configurations \varname{[vorbis_codebook_configurations]}. -\end{enumerate} - - - -\paragraph{Time domain transforms} - -These hooks are placeholders in Vorbis I. Nevertheless, the -configuration placeholder values must be read to maintain bitstream -sync. - -\begin{enumerate} -\item \varname{[vorbis_time_count]} = read 6 bits as unsigned integer and add one -\item read \varname{[vorbis_time_count]} 16 bit values; each value should be zero. If any value is nonzero, this is an error condition and the stream is undecodable. -\end{enumerate} - - - -\paragraph{Floors} - -Vorbis uses two floor types; header decode is handed to the decode -abstraction of the appropriate type. - -\begin{enumerate} - \item \varname{[vorbis_floor_count]} = read 6 bits as unsigned integer and add one - \item For each \varname{[i]} of \varname{[vorbis_floor_count]} floor numbers: - \begin{enumerate} - \item read the floor type: vector \varname{[vorbis_floor_types]} element \varname{[i]} = -read 16 bits as unsigned integer - \item If the floor type is zero, decode the floor -configuration as defined in \xref{vorbis:spec:floor0}; save -this -configuration in slot \varname{[i]} of the floor configuration array \varname{[vorbis_floor_configurations]}. - \item If the floor type is one, -decode the floor configuration as defined in \xref{vorbis:spec:floor1}; save this configuration in slot \varname{[i]} of the floor configuration array \varname{[vorbis_floor_configurations]}. - \item If the the floor type is greater than one, this stream is undecodable; ERROR CONDITION - \end{enumerate} - -\end{enumerate} - - - -\paragraph{Residues} - -Vorbis uses three residue types; header decode of each type is identical. - - -\begin{enumerate} -\item \varname{[vorbis_residue_count]} = read 6 bits as unsigned integer and add one - -\item For each of \varname{[vorbis_residue_count]} residue numbers: - \begin{enumerate} - \item read the residue type; vector \varname{[vorbis_residue_types]} element \varname{[i]} = read 16 bits as unsigned integer - \item If the residue type is zero, -one or two, decode the residue configuration as defined in \xref{vorbis:spec:residue}; save this configuration in slot \varname{[i]} of the residue configuration array \varname{[vorbis_residue_configurations]}. - \item If the the residue type is greater than two, this stream is undecodable; ERROR CONDITION - \end{enumerate} - -\end{enumerate} - - - -\paragraph{Mappings} - -Mappings are used to set up specific pipelines for encoding -multichannel audio with varying channel mapping applications. Vorbis I -uses a single mapping type (0), with implicit PCM channel mappings. - -% FIXME/TODO: LaTeX cannot nest enumerate that deeply, so I have to use -% itemize at the innermost level. However, it would be much better to -% rewrite this pseudocode using listings or algoritmicx or some other -% package geared towards this. -\begin{enumerate} - \item \varname{[vorbis_mapping_count]} = read 6 bits as unsigned integer and add one - \item For each \varname{[i]} of \varname{[vorbis_mapping_count]} mapping numbers: - \begin{enumerate} - \item read the mapping type: 16 bits as unsigned integer. There's no reason to save the mapping type in Vorbis I. - \item If the mapping type is nonzero, the stream is undecodable - \item If the mapping type is zero: - \begin{enumerate} - \item read 1 bit as a boolean flag - \begin{enumerate} - \item if set, \varname{[vorbis_mapping_submaps]} = read 4 bits as unsigned integer and add one - \item if unset, \varname{[vorbis_mapping_submaps]} = 1 - \end{enumerate} - - - \item read 1 bit as a boolean flag - \begin{enumerate} - \item if set, square polar channel mapping is in use: - \begin{itemize} - \item \varname{[vorbis_mapping_coupling_steps]} = read 8 bits as unsigned integer and add one - \item for \varname{[j]} each of \varname{[vorbis_mapping_coupling_steps]} steps: - \begin{itemize} - \item vector \varname{[vorbis_mapping_magnitude]} element \varname{[j]}= read \link{vorbis:spec:ilog}{ilog}(\varname{[audio_channels]} - 1) bits as unsigned integer - \item vector \varname{[vorbis_mapping_angle]} element \varname{[j]}= read \link{vorbis:spec:ilog}{ilog}(\varname{[audio_channels]} - 1) bits as unsigned integer - \item the numbers read in the above two steps are channel numbers representing the channel to treat as magnitude and the channel to treat as angle, respectively. If for any coupling step the angle channel number equals the magnitude channel number, the magnitude channel number is greater than \varname{[audio_channels]}-1, or the angle channel is greater than \varname{[audio_channels]}-1, the stream is undecodable. - \end{itemize} - - - \end{itemize} - - - \item if unset, \varname{[vorbis_mapping_coupling_steps]} = 0 - \end{enumerate} - - - \item read 2 bits (reserved field); if the value is nonzero, the stream is undecodable - \item if \varname{[vorbis_mapping_submaps]} is greater than one, we read channel multiplex settings. For each \varname{[j]} of \varname{[audio_channels]} channels: - \begin{enumerate} - \item vector \varname{[vorbis_mapping_mux]} element \varname{[j]} = read 4 bits as unsigned integer - \item if the value is greater than the highest numbered submap (\varname{[vorbis_mapping_submaps]} - 1), this in an error condition rendering the stream undecodable - \end{enumerate} - - \item for each submap \varname{[j]} of \varname{[vorbis_mapping_submaps]} submaps, read the floor and residue numbers for use in decoding that submap: - \begin{enumerate} - \item read and discard 8 bits (the unused time configuration placeholder) - \item read 8 bits as unsigned integer for the floor number; save in vector \varname{[vorbis_mapping_submap_floor]} element \varname{[j]} - \item verify the floor number is not greater than the highest number floor configured for the bitstream. If it is, the bitstream is undecodable - \item read 8 bits as unsigned integer for the residue number; save in vector \varname{[vorbis_mapping_submap_residue]} element \varname{[j]} - \item verify the residue number is not greater than the highest number residue configured for the bitstream. If it is, the bitstream is undecodable - \end{enumerate} - - \item save this mapping configuration in slot \varname{[i]} of the mapping configuration array \varname{[vorbis_mapping_configurations]}. - \end{enumerate} - - \end{enumerate} - -\end{enumerate} - - - -\paragraph{Modes} - -\begin{enumerate} - \item \varname{[vorbis_mode_count]} = read 6 bits as unsigned integer and add one - \item For each of \varname{[vorbis_mode_count]} mode numbers: - \begin{enumerate} - \item \varname{[vorbis_mode_blockflag]} = read 1 bit - \item \varname{[vorbis_mode_windowtype]} = read 16 bits as unsigned integer - \item \varname{[vorbis_mode_transformtype]} = read 16 bits as unsigned integer - \item \varname{[vorbis_mode_mapping]} = read 8 bits as unsigned integer - \item verify ranges; zero is the only legal value in Vorbis I for -\varname{[vorbis_mode_windowtype]} -and \varname{[vorbis_mode_transformtype]}. \varname{[vorbis_mode_mapping]} must not be greater than the highest number mapping in use. Any illegal values render the stream undecodable. - \item save this mode configuration in slot \varname{[i]} of the mode configuration array -\varname{[vorbis_mode_configurations]}. - \end{enumerate} - -\item read 1 bit as a framing flag. If unset, a framing error occurred and the stream is not -decodable. -\end{enumerate} - -After reading mode descriptions, setup header decode is complete. - - - - - - - - -\subsection{Audio packet decode and synthesis} - -Following the three header packets, all packets in a Vorbis I stream -are audio. The first step of audio packet decode is to read and -verify the packet type. \emph{A non-audio packet when audio is expected -indicates stream corruption or a non-compliant stream. The decoder -must ignore the packet and not attempt decoding it to audio}. - - -\subsubsection{packet type, mode and window decode} - -\begin{enumerate} - \item read 1 bit \varname{[packet_type]}; check that packet type is 0 (audio) - \item read \link{vorbis:spec:ilog}{ilog}([vorbis_mode_count]-1) bits -\varname{[mode_number]} - \item decode blocksize \varname{[n]} is equal to \varname{[blocksize_0]} if -\varname{[vorbis_mode_blockflag]} is 0, else \varname{[n]} is equal to \varname{[blocksize_1]}. - \item perform window selection and setup; this window is used later by the inverse MDCT: - \begin{enumerate} - \item if this is a long window (the \varname{[vorbis_mode_blockflag]} flag of this mode is -set): - \begin{enumerate} - \item read 1 bit for \varname{[previous_window_flag]} - \item read 1 bit for \varname{[next_window_flag]} - \item if \varname{[previous_window_flag]} is not set, the left half - of the window will be a hybrid window for lapping with a - short block. See \xref{vorbis:spec:window} for an illustration of overlapping -dissimilar - windows. Else, the left half window will have normal long - shape. - \item if \varname{[next_window_flag]} is not set, the right half of - the window will be a hybrid window for lapping with a short - block. See \xref{vorbis:spec:window} for an -illustration of overlapping dissimilar - windows. Else, the left right window will have normal long - shape. - \end{enumerate} - - \item if this is a short window, the window is always the same - short-window shape. - \end{enumerate} - -\end{enumerate} - -Vorbis windows all use the slope function $y=\sin(\frac{\pi}{2} * \sin^2((x+0.5)/n * \pi))$, -where $n$ is window size and $x$ ranges $0 \ldots n-1$, but dissimilar -lapping requirements can affect overall shape. Window generation -proceeds as follows: - -\begin{enumerate} - \item \varname{[window_center]} = \varname{[n]} / 2 - \item if (\varname{[vorbis_mode_blockflag]} is set and \varname{[previous_window_flag]} is -not set) then - \begin{enumerate} - \item \varname{[left_window_start]} = \varname{[n]}/4 - -\varname{[blocksize_0]}/4 - \item \varname{[left_window_end]} = \varname{[n]}/4 + \varname{[blocksize_0]}/4 - \item \varname{[left_n]} = \varname{[blocksize_0]}/2 - \end{enumerate} - else - \begin{enumerate} - \item \varname{[left_window_start]} = 0 - \item \varname{[left_window_end]} = \varname{[window_center]} - \item \varname{[left_n]} = \varname{[n]}/2 - \end{enumerate} - - \item if (\varname{[vorbis_mode_blockflag]} is set and \varname{[next_window_flag]} is not -set) then - \begin{enumerate} - \item \varname{[right_window_start]} = \varname{[n]*3}/4 - -\varname{[blocksize_0]}/4 - \item \varname{[right_window_end]} = \varname{[n]*3}/4 + -\varname{[blocksize_0]}/4 - \item \varname{[right_n]} = \varname{[blocksize_0]}/2 - \end{enumerate} - else - \begin{enumerate} - \item \varname{[right_window_start]} = \varname{[window_center]} - \item \varname{[right_window_end]} = \varname{[n]} - \item \varname{[right_n]} = \varname{[n]}/2 - \end{enumerate} - - \item window from range 0 ... \varname{[left_window_start]}-1 inclusive is zero - \item for \varname{[i]} in range \varname{[left_window_start]} ... -\varname{[left_window_end]}-1, window(\varname{[i]}) = $\sin(\frac{\pi}{2} * \sin^2($ (\varname{[i]}-\varname{[left_window_start]}+0.5) / \varname{[left_n]} $* \frac{\pi}{2})$ ) - \item window from range \varname{[left_window_end]} ... \varname{[right_window_start]}-1 -inclusive is one\item for \varname{[i]} in range \varname{[right_window_start]} ... \varname{[right_window_end]}-1, window(\varname{[i]}) = $\sin(\frac{\pi}{2} * \sin^2($ (\varname{[i]}-\varname{[right_window_start]}+0.5) / \varname{[right_n]} $ * \frac{\pi}{2} + \frac{\pi}{2})$ ) -\item window from range \varname{[right_window_start]} ... \varname{[n]}-1 is -zero -\end{enumerate} - -An end-of-packet condition up to this point should be considered an -error that discards this packet from the stream. An end of packet -condition past this point is to be considered a possible nominal -occurrence. - - - -\subsubsection{floor curve decode} - -From this point on, we assume out decode context is using mode number -\varname{[mode_number]} from configuration array -\varname{[vorbis_mode_configurations]} and the map number -\varname{[vorbis_mode_mapping]} (specified by the current mode) taken -from the mapping configuration array -\varname{[vorbis_mapping_configurations]}. - -Floor curves are decoded one-by-one in channel order. - -For each floor \varname{[i]} of \varname{[audio_channels]} - \begin{enumerate} - \item \varname{[submap_number]} = element \varname{[i]} of vector [vorbis_mapping_mux] - \item \varname{[floor_number]} = element \varname{[submap_number]} of vector -[vorbis_submap_floor] - \item if the floor type of this -floor (vector \varname{[vorbis_floor_types]} element -\varname{[floor_number]}) is zero then decode the floor for -channel \varname{[i]} according to the -\xref{vorbis:spec:floor0-decode} - \item if the type of this floor -is one then decode the floor for channel \varname{[i]} according -to the \xref{vorbis:spec:floor1-decode} - \item save the needed decoded floor information for channel for later synthesis - \item if the decoded floor returned 'unused', set vector \varname{[no_residue]} element -\varname{[i]} to true, else set vector \varname{[no_residue]} element \varname{[i]} to -false - \end{enumerate} - - -An end-of-packet condition during floor decode shall result in packet -decode zeroing all channel output vectors and skipping to the -add/overlap output stage. - - - -\subsubsection{nonzero vector propagate} - -A possible result of floor decode is that a specific vector is marked -'unused' which indicates that that final output vector is all-zero -values (and the floor is zero). The residue for that vector is not -coded in the stream, save for one complication. If some vectors are -used and some are not, channel coupling could result in mixing a -zeroed and nonzeroed vector to produce two nonzeroed vectors. - -for each \varname{[i]} from 0 ... \varname{[vorbis_mapping_coupling_steps]}-1 - -\begin{enumerate} - \item if either \varname{[no_residue]} entry for channel -(\varname{[vorbis_mapping_magnitude]} element \varname{[i]}) -or channel -(\varname{[vorbis_mapping_angle]} element \varname{[i]}) -are set to false, then both must be set to false. Note that an 'unused' -floor has no decoded floor information; it is important that this is -remembered at floor curve synthesis time. -\end{enumerate} - - - - -\subsubsection{residue decode} - -Unlike floors, which are decoded in channel order, the residue vectors -are decoded in submap order. - -for each submap \varname{[i]} in order from 0 ... \varname{[vorbis_mapping_submaps]}-1 - -\begin{enumerate} - \item \varname{[ch]} = 0 - \item for each channel \varname{[j]} in order from 0 ... \varname{[audio_channels]} - 1 - \begin{enumerate} - \item if channel \varname{[j]} in submap \varname{[i]} (vector \varname{[vorbis_mapping_mux]} element \varname{[j]} is equal to \varname{[i]}) - \begin{enumerate} - \item if vector \varname{[no_residue]} element \varname{[j]} is true - \begin{enumerate} - \item vector \varname{[do_not_decode_flag]} element \varname{[ch]} is set - \end{enumerate} - else - \begin{enumerate} - \item vector \varname{[do_not_decode_flag]} element \varname{[ch]} is unset - \end{enumerate} - - \item increment \varname{[ch]} - \end{enumerate} - - \end{enumerate} - \item \varname{[residue_number]} = vector \varname{[vorbis_mapping_submap_residue]} element \varname{[i]} - \item \varname{[residue_type]} = vector \varname{[vorbis_residue_types]} element \varname{[residue_number]} - \item decode \varname{[ch]} vectors using residue \varname{[residue_number]}, according to type \varname{[residue_type]}, also passing vector \varname{[do_not_decode_flag]} to indicate which vectors in the bundle should not be decoded. Correct per-vector decode length is \varname{[n]}/2. - \item \varname{[ch]} = 0 - \item for each channel \varname{[j]} in order from 0 ... \varname{[audio_channels]} - \begin{enumerate} - \item if channel \varname{[j]} is in submap \varname{[i]} (vector \varname{[vorbis_mapping_mux]} element \varname{[j]} is equal to \varname{[i]}) - \begin{enumerate} - \item residue vector for channel \varname{[j]} is set to decoded residue vector \varname{[ch]} - \item increment \varname{[ch]} - \end{enumerate} - - \end{enumerate} - -\end{enumerate} - - - -\subsubsection{inverse coupling} - -for each \varname{[i]} from \varname{[vorbis_mapping_coupling_steps]}-1 descending to 0 - -\begin{enumerate} - \item \varname{[magnitude_vector]} = the residue vector for channel -(vector \varname{[vorbis_mapping_magnitude]} element \varname{[i]}) - \item \varname{[angle_vector]} = the residue vector for channel (vector -\varname{[vorbis_mapping_angle]} element \varname{[i]}) - \item for each scalar value \varname{[M]} in vector \varname{[magnitude_vector]} and the corresponding scalar value \varname{[A]} in vector \varname{[angle_vector]}: - \begin{enumerate} - \item if (\varname{[M]} is greater than zero) - \begin{enumerate} - \item if (\varname{[A]} is greater than zero) - \begin{enumerate} - \item \varname{[new_M]} = \varname{[M]} - \item \varname{[new_A]} = \varname{[M]}-\varname{[A]} - \end{enumerate} - else - \begin{enumerate} - \item \varname{[new_A]} = \varname{[M]} - \item \varname{[new_M]} = \varname{[M]}+\varname{[A]} - \end{enumerate} - - \end{enumerate} - else - \begin{enumerate} - \item if (\varname{[A]} is greater than zero) - \begin{enumerate} - \item \varname{[new_M]} = \varname{[M]} - \item \varname{[new_A]} = \varname{[M]}+\varname{[A]} - \end{enumerate} - else - \begin{enumerate} - \item \varname{[new_A]} = \varname{[M]} - \item \varname{[new_M]} = \varname{[M]}-\varname{[A]} - \end{enumerate} - - \end{enumerate} - - \item set scalar value \varname{[M]} in vector \varname{[magnitude_vector]} to \varname{[new_M]} - \item set scalar value \varname{[A]} in vector \varname{[angle_vector]} to \varname{[new_A]} - \end{enumerate} - -\end{enumerate} - - - - -\subsubsection{dot product} - -For each channel, synthesize the floor curve from the decoded floor -information, according to packet type. Note that the vector synthesis -length for floor computation is \varname{[n]}/2. - -For each channel, multiply each element of the floor curve by each -element of that channel's residue vector. The result is the dot -product of the floor and residue vectors for each channel; the produced -vectors are the length \varname{[n]}/2 audio spectrum for each -channel. - -% TODO/FIXME: The following two paragraphs have identical twins -% in section 1 (under "compute floor/residue dot product") -One point is worth mentioning about this dot product; a common mistake -in a fixed point implementation might be to assume that a 32 bit -fixed-point representation for floor and residue and direct -multiplication of the vectors is sufficient for acceptable spectral -depth in all cases because it happens to mostly work with the current -Xiph.Org reference encoder. - -However, floor vector values can span \~140dB (\~24 bits unsigned), and -the audio spectrum vector should represent a minimum of 120dB (\~21 -bits with sign), even when output is to a 16 bit PCM device. For the -residue vector to represent full scale if the floor is nailed to -$-140$dB, it must be able to span 0 to $+140$dB. For the residue vector -to reach full scale if the floor is nailed at 0dB, it must be able to -represent $-140$dB to $+0$dB. Thus, in order to handle full range -dynamics, a residue vector may span $-140$dB to $+140$dB entirely within -spec. A 280dB range is approximately 48 bits with sign; thus the -residue vector must be able to represent a 48 bit range and the dot -product must be able to handle an effective 48 bit times 24 bit -multiplication. This range may be achieved using large (64 bit or -larger) integers, or implementing a movable binary point -representation. - - - -\subsubsection{inverse MDCT} - -Convert the audio spectrum vector of each channel back into time -domain PCM audio via an inverse Modified Discrete Cosine Transform -(MDCT). A detailed description of the MDCT is available in \cite{Sporer/Brandenburg/Edler}. The window -function used for the MDCT is the function described earlier. - - - -\subsubsection{overlap_add} - -Windowed MDCT output is overlapped and added with the right hand data -of the previous window such that the 3/4 point of the previous window -is aligned with the 1/4 point of the current window (as illustrated in -\xref{vorbis:spec:window}). The overlapped portion -produced from overlapping the previous and current frame data is -finished data to be returned by the decoder. This data spans from the -center of the previous window to the center of the current window. In -the case of same-sized windows, the amount of data to return is -one-half block consisting of and only of the overlapped portions. When -overlapping a short and long window, much of the returned range does not -actually overlap. This does not damage transform orthogonality. Pay -attention however to returning the correct data range; the amount of -data to be returned is: - -\begin{programlisting} -window_blocksize(previous_window)/4+window_blocksize(current_window)/4 -\end{programlisting} - -from the center (element windowsize/2) of the previous window to the -center (element windowsize/2-1, inclusive) of the current window. - -Data is not returned from the first frame; it must be used to 'prime' -the decode engine. The encoder accounts for this priming when -calculating PCM offsets; after the first frame, the proper PCM output -offset is '0' (as no data has been returned yet). - - - -\subsubsection{output channel order} - -Vorbis I specifies only a channel mapping type 0. In mapping type 0, -channel mapping is implicitly defined as follows for standard audio -applications. As of revision 16781 (20100113), the specification adds -defined channel locations for 6.1 and 7.1 surround. Ordering/location -for greater-than-eight channels remains 'left to the implementation'. - -These channel orderings refer to order within the encoded stream. It -is naturally possible for a decoder to produce output with channels in -any order. Any such decoder should explicitly document channel -reordering behavior. - -\begin{description} %[style=nextline] - \item[one channel] - the stream is monophonic - -\item[two channels] - the stream is stereo. channel order: left, right - -\item[three channels] - the stream is a 1d-surround encoding. channel order: left, -center, right - -\item[four channels] - the stream is quadraphonic surround. channel order: front left, -front right, rear left, rear right - -\item[five channels] - the stream is five-channel surround. channel order: front left, -center, front right, rear left, rear right - -\item[six channels] - the stream is 5.1 surround. channel order: front left, center, -front right, rear left, rear right, LFE - -\item[seven channels] - the stream is 6.1 surround. channel order: front left, center, -front right, side left, side right, rear center, LFE - -\item[eight channels] - the stream is 7.1 surround. channel order: front left, center, -front right, side left, side right, rear left, rear right, -LFE - -\item[greater than eight channels] - channel use and order is defined by the application - -\end{description} - -Applications using Vorbis for dedicated purposes may define channel -mapping as seen fit. Future channel mappings (such as three and four -channel \href{http://www.ambisonic.net/}{Ambisonics}) will -make use of channel mappings other than mapping 0. - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/05-comment.tex b/ExternalLibs/libvorbis-1.3.1/doc/05-comment.tex deleted file mode 100644 index 79fd9e9..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/05-comment.tex +++ /dev/null @@ -1,240 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{comment field and header specification} \label{vorbis:spec:comment} - -\subsection{Overview} - -The Vorbis text comment header is the second (of three) header -packets that begin a Vorbis bitstream. It is meant for short text -comments, not arbitrary metadata; arbitrary metadata belongs in a -separate logical bitstream (usually an XML stream type) that provides -greater structure and machine parseability. - -The comment field is meant to be used much like someone jotting a -quick note on the bottom of a CDR. It should be a little information to -remember the disc by and explain it to others; a short, to-the-point -text note that need not only be a couple words, but isn't going to be -more than a short paragraph. The essentials, in other words, whatever -they turn out to be, eg: - -\begin{quote} -Honest Bob and the Factory-to-Dealer-Incentives, \textit{``I'm Still -Around''}, opening for Moxy Fr\"{u}vous, 1997. -\end{quote} - - - - -\subsection{Comment encoding} - -\subsubsection{Structure} - -The comment header is logically a list of eight-bit-clean vectors; the -number of vectors is bounded to $2^{32}-1$ and the length of each vector -is limited to $2^{32}-1$ bytes. The vector length is encoded; the vector -contents themselves are not null terminated. In addition to the vector -list, there is a single vector for vendor name (also 8 bit clean, -length encoded in 32 bits). For example, the 1.0 release of libvorbis -set the vendor string to ``Xiph.Org libVorbis I 20020717''. - -The vector lengths and number of vectors are stored lsb first, according -to the bit packing conventions of the vorbis codec. However, since data -in the comment header is octet-aligned, they can simply be read as -unaligned 32 bit little endian unsigned integers. - -The comment header is decoded as follows: - -\begin{programlisting} - 1) [vendor_length] = read an unsigned integer of 32 bits - 2) [vendor_string] = read a UTF-8 vector as [vendor_length] octets - 3) [user_comment_list_length] = read an unsigned integer of 32 bits - 4) iterate [user_comment_list_length] times { - 5) [length] = read an unsigned integer of 32 bits - 6) this iteration's user comment = read a UTF-8 vector as [length] octets - } - 7) [framing_bit] = read a single bit as boolean - 8) if ( [framing_bit] unset or end-of-packet ) then ERROR - 9) done. -\end{programlisting} - - - - -\subsubsection{Content vector format} - -The comment vectors are structured similarly to a UNIX environment variable. -That is, comment fields consist of a field name and a corresponding value and -look like: - -\begin{quote} -\begin{programlisting} -comment[0]="ARTIST=me"; -comment[1]="TITLE=the sound of Vorbis"; -\end{programlisting} -\end{quote} - -The field name is case-insensitive and may consist of ASCII 0x20 -through 0x7D, 0x3D ('=') excluded. ASCII 0x41 through 0x5A inclusive -(characters A-Z) is to be considered equivalent to ASCII 0x61 through -0x7A inclusive (characters a-z). - - -The field name is immediately followed by ASCII 0x3D ('='); -this equals sign is used to terminate the field name. - - -0x3D is followed by 8 bit clean UTF-8 encoded value of the -field contents to the end of the field. - - -\paragraph{Field names} - -Below is a proposed, minimal list of standard field names with a -description of intended use. No single or group of field names is -mandatory; a comment header may contain one, all or none of the names -in this list. - -\begin{description} %[style=nextline] -\item[TITLE] - Track/Work name - -\item[VERSION] - The version field may be used to differentiate multiple -versions of the same track title in a single collection. (e.g. remix -info) - -\item[ALBUM] - The collection name to which this track belongs - -\item[TRACKNUMBER] - The track number of this piece if part of a specific larger collection or album - -\item[ARTIST] - The artist generally considered responsible for the work. In popular music this is usually the performing band or singer. For classical music it would be the composer. For an audio book it would be the author of the original text. - -\item[PERFORMER] - The artist(s) who performed the work. In classical music this would be the conductor, orchestra, soloists. In an audio book it would be the actor who did the reading. In popular music this is typically the same as the ARTIST and is omitted. - -\item[COPYRIGHT] - Copyright attribution, e.g., '2001 Nobody's Band' or '1999 Jack Moffitt' - -\item[LICENSE] - License information, eg, 'All Rights Reserved', 'Any -Use Permitted', a URL to a license such as a Creative Commons license -("www.creativecommons.org/blahblah/license.html") or the EFF Open -Audio License ('distributed under the terms of the Open Audio -License. see http://www.eff.org/IP/Open_licenses/eff_oal.html for -details'), etc. - -\item[ORGANIZATION] - Name of the organization producing the track (i.e. -the 'record label') - -\item[DESCRIPTION] - A short text description of the contents - -\item[GENRE] - A short text indication of music genre - -\item[DATE] - Date the track was recorded - -\item[LOCATION] - Location where track was recorded - -\item[CONTACT] - Contact information for the creators or distributors of the track. This could be a URL, an email address, the physical address of the producing label. - -\item[ISRC] - International Standard Recording Code for the -track; see \href{http://www.ifpi.org/isrc/}{the ISRC -intro page} for more information on ISRC numbers. - -\end{description} - - - -\paragraph{Implications} - -Field names should not be 'internationalized'; this is a -concession to simplicity not an attempt to exclude the majority of -the world that doesn't speak English. Field \emph{contents}, -however, use the UTF-8 character encoding to allow easy representation -of any language. - -We have the length of the entirety of the field and restrictions on -the field name so that the field name is bounded in a known way. Thus -we also have the length of the field contents. - -Individual 'vendors' may use non-standard field names within -reason. The proper use of comment fields should be clear through -context at this point. Abuse will be discouraged. - -There is no vendor-specific prefix to 'nonstandard' field names. -Vendors should make some effort to avoid arbitrarily polluting the -common namespace. We will generally collect the more useful tags -here to help with standardization. - -Field names are not required to be unique (occur once) within a -comment header. As an example, assume a track was recorded by three -well know artists; the following is permissible, and encouraged: - -\begin{quote} -\begin{programlisting} -ARTIST=Dizzy Gillespie -ARTIST=Sonny Rollins -ARTIST=Sonny Stitt -\end{programlisting} -\end{quote} - - - - - - - -\subsubsection{Encoding} - -The comment header comprises the entirety of the second bitstream -header packet. Unlike the first bitstream header packet, it is not -generally the only packet on the second page and may not be restricted -to within the second bitstream page. The length of the comment header -packet is (practically) unbounded. The comment header packet is not -optional; it must be present in the bitstream even if it is -effectively empty. - -The comment header is encoded as follows (as per Ogg's standard -bitstream mapping which renders least-significant-bit of the word to be -coded into the least significant available bit of the current -bitstream octet first): - -\begin{enumerate} - \item - Vendor string length (32 bit unsigned quantity specifying number of octets) - - \item - Vendor string ([vendor string length] octets coded from beginning of string to end of string, not null terminated) - - \item - Number of comment fields (32 bit unsigned quantity specifying number of fields) - - \item - Comment field 0 length (if [Number of comment fields] $>0$; 32 bit unsigned quantity specifying number of octets) - - \item - Comment field 0 ([Comment field 0 length] octets coded from beginning of string to end of string, not null terminated) - - \item - Comment field 1 length (if [Number of comment fields] $>1$...)... - -\end{enumerate} - - -This is actually somewhat easier to describe in code; implementation of the above can be found in \filename{vorbis/lib/info.c}, \function{_vorbis_pack_comment()} and \function{_vorbis_unpack_comment()}. - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/06-floor0.tex b/ExternalLibs/libvorbis-1.3.1/doc/06-floor0.tex deleted file mode 100644 index 373a9bb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/06-floor0.tex +++ /dev/null @@ -1,192 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Floor type 0 setup and decode} \label{vorbis:spec:floor0} - -\subsection{Overview} - -Vorbis floor type zero uses Line Spectral Pair (LSP, also alternately -known as Line Spectral Frequency or LSF) representation to encode a -smooth spectral envelope curve as the frequency response of the LSP -filter. This representation is equivalent to a traditional all-pole -infinite impulse response filter as would be used in linear predictive -coding; LSP representation may be converted to LPC representation and -vice-versa. - - - -\subsection{Floor 0 format} - -Floor zero configuration consists of six integer fields and a list of -VQ codebooks for use in coding/decoding the LSP filter coefficient -values used by each frame. - -\subsubsection{header decode} - -Configuration information for instances of floor zero decodes from the -codec setup header (third packet). configuration decode proceeds as -follows: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [floor0_order] = read an unsigned integer of 8 bits - 2) [floor0_rate] = read an unsigned integer of 16 bits - 3) [floor0_bark_map_size] = read an unsigned integer of 16 bits - 4) [floor0_amplitude_bits] = read an unsigned integer of six bits - 5) [floor0_amplitude_offset] = read an unsigned integer of eight bits - 6) [floor0_number_of_books] = read an unsigned integer of four bits and add 1 - 7) array [floor0_book_list] = read a list of [floor0_number_of_books] unsigned integers of eight bits each; -\end{Verbatim} - -An end-of-packet condition during any of these bitstream reads renders -this stream undecodable. In addition, any element of the array -\varname{[floor0_book_list]} that is greater than the maximum codebook -number for this bitstream is an error condition that also renders the -stream undecodable. - - - -\subsubsection{packet decode} \label{vorbis:spec:floor0-decode} - -Extracting a floor0 curve from an audio packet consists of first -decoding the curve amplitude and \varname{[floor0_order]} LSP -coefficient values from the bitstream, and then computing the floor -curve, which is defined as the frequency response of the decoded LSP -filter. - -Packet decode proceeds as follows: -\begin{Verbatim}[commandchars=\\\{\}] - 1) [amplitude] = read an unsigned integer of [floor0_amplitude_bits] bits - 2) if ( [amplitude] is greater than zero ) \{ - 3) [coefficients] is an empty, zero length vector - 4) [booknumber] = read an unsigned integer of \link{vorbis:spec:ilog}{ilog}( [floor0_number_of_books] ) bits - 5) if ( [booknumber] is greater than the highest number decode codebook ) then packet is undecodable - 6) [last] = zero; - 7) vector [temp_vector] = read vector from bitstream using codebook number [floor0_book_list] element [booknumber] in VQ context. - 8) add the scalar value [last] to each scalar in vector [temp_vector] - 9) [last] = the value of the last scalar in vector [temp_vector] - 10) concatenate [temp_vector] onto the end of the [coefficients] vector - 11) if (length of vector [coefficients] is less than [floor0_order], continue at step 6 - - \} - - 12) done. - -\end{Verbatim} - -Take note of the following properties of decode: -\begin{itemize} - \item An \varname{[amplitude]} value of zero must result in a return code that indicates this channel is unused in this frame (the output of the channel will be all-zeroes in synthesis). Several later stages of decode don't occur for an unused channel. - \item An end-of-packet condition during decode should be considered a -nominal occruence; if end-of-packet is reached during any read -operation above, floor decode is to return 'unused' status as if the -\varname{[amplitude]} value had read zero at the beginning of decode. - - \item The book number used for decode -can, in fact, be stored in the bitstream in \link{vorbis:spec:ilog}{ilog}( \varname{[floor0_number_of_books]} - -1 ) bits. Nevertheless, the above specification is correct and values -greater than the maximum possible book value are reserved. - - \item The number of scalars read into the vector \varname{[coefficients]} -may be greater than \varname{[floor0_order]}, the number actually -required for curve computation. For example, if the VQ codebook used -for the floor currently being decoded has a -\varname{[codebook_dimensions]} value of three and -\varname{[floor0_order]} is ten, the only way to fill all the needed -scalars in \varname{[coefficients]} is to to read a total of twelve -scalars as four vectors of three scalars each. This is not an error -condition, and care must be taken not to allow a buffer overflow in -decode. The extra values are not used and may be ignored or discarded. -\end{itemize} - - - - -\subsubsection{curve computation} \label{vorbis:spec:floor0-synth} - -Given an \varname{[amplitude]} integer and \varname{[coefficients]} -vector from packet decode as well as the [floor0_order], -[floor0_rate], [floor0_bark_map_size], [floor0_amplitude_bits] and -[floor0_amplitude_offset] values from floor setup, and an output -vector size \varname{[n]} specified by the decode process, we compute a -floor output vector. - -If the value \varname{[amplitude]} is zero, the return value is a -length \varname{[n]} vector with all-zero scalars. Otherwise, begin by -assuming the following definitions for the given vector to be -synthesized: - - \begin{displaymath} - \mathrm{map}_i = \left\{ - \begin{array}{ll} - \min ( - \mathtt{floor0\_bark\_map\_size} - 1, - foobar - ) & \textrm{for } i \in [0,n-1] \\ - -1 & \textrm{for } i = n - \end{array} - \right. - \end{displaymath} - - where - - \begin{displaymath} - foobar = - \left\lfloor - \mathrm{bark}\left(\frac{\mathtt{floor0\_rate} \cdot i}{2n}\right) \cdot \frac{\mathtt{floor0\_bark\_map\_size}} {\mathrm{bark}(.5 \cdot \mathtt{floor0\_rate})} - \right\rfloor - \end{displaymath} - - and - - \begin{displaymath} - \mathrm{bark}(x) = 13.1 \arctan (.00074x) + 2.24 \arctan (.0000000185x^2 + .0001x) - \end{displaymath} - -The above is used to synthesize the LSP curve on a Bark-scale frequency -axis, then map the result to a linear-scale frequency axis. -Similarly, the below calculation synthesizes the output LSP curve \varname{[output]} on a log -(dB) amplitude scale, mapping it to linear amplitude in the last step: - -\begin{enumerate} - \item \varname{[i]} = 0 - \item \varname{[$\omega$]} = $\pi$ * map element \varname{[i]} / \varname{[floor0_bark_map_size]} - \item if ( \varname{[floor0_order]} is odd ) { - \begin{enumerate} - \item calculate \varname{[p]} and \varname{[q]} according to: - \begin{eqnarray*} - p & = & (1 - \cos^2\omega)\prod_{j=0}^{\frac{\mathtt{floor0\_order}-3}{2}} 4 (\cos([\mathtt{coefficients}]_{2j+1}) - \cos \omega)^2 \\ - q & = & \frac{1}{4} \prod_{j=0}^{\frac{\mathtt{floor0\_order}-1}{2}} 4 (\cos([\mathtt{coefficients}]_{2j}) - \cos \omega)^2 - \end{eqnarray*} - - \end{enumerate} - } else \varname{[floor0_order]} is even { - \begin{enumerate} - \item calculate \varname{[p]} and \varname{[q]} according to: - \begin{eqnarray*} - p & = & \frac{(1 - \cos^2\omega)}{2} \prod_{j=0}^{\frac{\mathtt{floor0\_order}-2}{2}} 4 (\cos([\mathtt{coefficients}]_{2j+1}) - \cos \omega)^2 \\ - q & = & \frac{(1 + \cos^2\omega)}{2} \prod_{j=0}^{\frac{\mathtt{floor0\_order}-2}{2}} 4 (\cos([\mathtt{coefficients}]_{2j}) - \cos \omega)^2 - \end{eqnarray*} - - \end{enumerate} - } - - \item calculate \varname{[linear_floor_value]} according to: - \begin{displaymath} - \exp \left( .11512925 \left(\frac{\mathtt{amplitude} \cdot \mathtt{floor0\_amplitute\_offset}}{(2^{\mathtt{floor0\_amplitude\_bits}}-1)\sqrt{p+q}} - - \mathtt{floor0\_amplitude\_offset} \right) \right) - \end{displaymath} - - \item \varname{[iteration_condition]} = map element \varname{[i]} - \item \varname{[output]} element \varname{[i]} = \varname{[linear_floor_value]} - \item increment \varname{[i]} - \item if ( map element \varname{[i]} is equal to \varname{[iteration_condition]} ) continue at step 5 - \item if ( \varname{[i]} is less than \varname{[n]} ) continue at step 2 - \item done -\end{enumerate} - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/07-floor1.tex b/ExternalLibs/libvorbis-1.3.1/doc/07-floor1.tex deleted file mode 100644 index 216eb1d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/07-floor1.tex +++ /dev/null @@ -1,392 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Floor type 1 setup and decode} \label{vorbis:spec:floor1} - -\subsection{Overview} - -Vorbis floor type one uses a piecewise straight-line representation to -encode a spectral envelope curve. The representation plots this curve -mechanically on a linear frequency axis and a logarithmic (dB) -amplitude axis. The integer plotting algorithm used is similar to -Bresenham's algorithm. - - - -\subsection{Floor 1 format} - -\subsubsection{model} - -Floor type one represents a spectral curve as a series of -line segments. Synthesis constructs a floor curve using iterative -prediction in a process roughly equivalent to the following simplified -description: - -\begin{itemize} - \item the first line segment (base case) is a logical line spanning -from x_0,y_0 to x_1,y_1 where in the base case x_0=0 and x_1=[n], the -full range of the spectral floor to be computed. - -\item the induction step chooses a point x_new within an existing -logical line segment and produces a y_new value at that point computed -from the existing line's y value at x_new (as plotted by the line) and -a difference value decoded from the bitstream packet. - -\item floor computation produces two new line segments, one running from -x_0,y_0 to x_new,y_new and from x_new,y_new to x_1,y_1. This step is -performed logically even if y_new represents no change to the -amplitude value at x_new so that later refinement is additionally -bounded at x_new. - -\item the induction step repeats, using a list of x values specified in -the codec setup header at floor 1 initialization time. Computation -is completed at the end of the x value list. - -\end{itemize} - - -Consider the following example, with values chosen for ease of -understanding rather than representing typical configuration: - -For the below example, we assume a floor setup with an [n] of 128. -The list of selected X values in increasing order is -0,16,32,48,64,80,96,112 and 128. In list order, the values interleave -as 0, 128, 64, 32, 96, 16, 48, 80 and 112. The corresponding -list-order Y values as decoded from an example packet are 110, 20, -5, --45, 0, -25, -10, 30 and -10. We compute the floor in the following -way, beginning with the first line: - -\begin{center} -\includegraphics[width=8cm]{floor1-1} -\captionof{figure}{graph of example floor} -\end{center} - -We now draw new logical lines to reflect the correction to new_Y, and -iterate for X positions 32 and 96: - -\begin{center} -\includegraphics[width=8cm]{floor1-2} -\captionof{figure}{graph of example floor} -\end{center} - -Although the new Y value at X position 96 is unchanged, it is still -used later as an endpoint for further refinement. From here on, the -pattern should be clear; we complete the floor computation as follows: - -\begin{center} -\includegraphics[width=8cm]{floor1-3} -\captionof{figure}{graph of example floor} -\end{center} - -\begin{center} -\includegraphics[width=8cm]{floor1-4} -\captionof{figure}{graph of example floor} -\end{center} - -A more efficient algorithm with carefully defined integer rounding -behavior is used for actual decode, as described later. The actual -algorithm splits Y value computation and line plotting into two steps -with modifications to the above algorithm to eliminate noise -accumulation through integer roundoff/truncation. - - - -\subsubsection{header decode} - -A list of floor X values is stored in the packet header in interleaved -format (used in list order during packet decode and synthesis). This -list is split into partitions, and each partition is assigned to a -partition class. X positions 0 and [n] are implicit and do not belong -to an explicit partition or partition class. - -A partition class consists of a representation vector width (the -number of Y values which the partition class encodes at once), a -'subclass' value representing the number of alternate entropy books -the partition class may use in representing Y values, the list of -[subclass] books and a master book used to encode which alternate -books were chosen for representation in a given packet. The -master/subclass mechanism is meant to be used as a flexible -representation cascade while still using codebooks only in a scalar -context. - -\begin{Verbatim}[commandchars=\\\{\}] - - 1) [floor1_partitions] = read 5 bits as unsigned integer - 2) [maximum_class] = -1 - 3) iterate [i] over the range 0 ... [floor1_partitions]-1 \{ - - 4) vector [floor1_partition_class_list] element [i] = read 4 bits as unsigned integer - - \} - - 5) [maximum_class] = largest integer scalar value in vector [floor1_partition_class_list] - 6) iterate [i] over the range 0 ... [maximum_class] \{ - - 7) vector [floor1_class_dimensions] element [i] = read 3 bits as unsigned integer and add 1 - 8) vector [floor1_class_subclasses] element [i] = read 2 bits as unsigned integer - 9) if ( vector [floor1_class_subclasses] element [i] is nonzero ) \{ - - 10) vector [floor1_class_masterbooks] element [i] = read 8 bits as unsigned integer - - \} - - 11) iterate [j] over the range 0 ... (2 exponent [floor1_class_subclasses] element [i]) - 1 \{ - - 12) array [floor1_subclass_books] element [i],[j] = - read 8 bits as unsigned integer and subtract one - \} - \} - - 13) [floor1_multiplier] = read 2 bits as unsigned integer and add one - 14) [rangebits] = read 4 bits as unsigned integer - 15) vector [floor1_X_list] element [0] = 0 - 16) vector [floor1_X_list] element [1] = 2 exponent [rangebits]; - 17) [floor1_values] = 2 - 18) iterate [i] over the range 0 ... [floor1_partitions]-1 \{ - - 19) [current_class_number] = vector [floor1_partition_class_list] element [i] - 20) iterate [j] over the range 0 ... ([floor1_class_dimensions] element [current_class_number])-1 \{ - 21) vector [floor1_X_list] element ([floor1_values]) = - read [rangebits] bits as unsigned integer - 22) increment [floor1_values] by one - \} - \} - - 23) done -\end{Verbatim} - -An end-of-packet condition while reading any aspect of a floor 1 -configuration during setup renders a stream undecodable. In addition, -a \varname{[floor1_class_masterbooks]} or -\varname{[floor1_subclass_books]} scalar element greater than the -highest numbered codebook configured in this stream is an error -condition that renders the stream undecodable. All vector -[floor1_x_list] element values must be unique within the vector; a -non-unique value renders the stream undecodable. - -\paragraph{packet decode} \label{vorbis:spec:floor1-decode} - -Packet decode begins by checking the \varname{[nonzero]} flag: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [nonzero] = read 1 bit as boolean -\end{Verbatim} - -If \varname{[nonzero]} is unset, that indicates this channel contained -no audio energy in this frame. Decode immediately returns a status -indicating this floor curve (and thus this channel) is unused this -frame. (A return status of 'unused' is different from decoding a -floor that has all points set to minimum representation amplitude, -which happens to be approximately -140dB). - - -Assuming \varname{[nonzero]} is set, decode proceeds as follows: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [range] = vector \{ 256, 128, 86, 64 \} element ([floor1_multiplier]-1) - 2) vector [floor1_Y] element [0] = read \link{vorbis:spec:ilog}{ilog}([range]-1) bits as unsigned integer - 3) vector [floor1_Y] element [1] = read \link{vorbis:spec:ilog}{ilog}([range]-1) bits as unsigned integer - 4) [offset] = 2; - 5) iterate [i] over the range 0 ... [floor1_partitions]-1 \{ - - 6) [class] = vector [floor1_partition_class] element [i] - 7) [cdim] = vector [floor1_class_dimensions] element [class] - 8) [cbits] = vector [floor1_class_subclasses] element [class] - 9) [csub] = (2 exponent [cbits])-1 - 10) [cval] = 0 - 11) if ( [cbits] is greater than zero ) \{ - - 12) [cval] = read from packet using codebook number - (vector [floor1_class_masterbooks] element [class]) in scalar context - \} - - 13) iterate [j] over the range 0 ... [cdim]-1 \{ - - 14) [book] = array [floor1_subclass_books] element [class],([cval] bitwise AND [csub]) - 15) [cval] = [cval] right shifted [cbits] bits - 16) if ( [book] is not less than zero ) \{ - - 17) vector [floor1_Y] element ([j]+[offset]) = read from packet using codebook - [book] in scalar context - - \} else [book] is less than zero \{ - - 18) vector [floor1_Y] element ([j]+[offset]) = 0 - - \} - \} - - 19) [offset] = [offset] + [cdim] - - \} - - 20) done -\end{Verbatim} - -An end-of-packet condition during curve decode should be considered a -nominal occurrence; if end-of-packet is reached during any read -operation above, floor decode is to return 'unused' status as if the -\varname{[nonzero]} flag had been unset at the beginning of decode. - - -Vector \varname{[floor1_Y]} contains the values from packet decode -needed for floor 1 synthesis. - - - -\paragraph{curve computation} \label{vorbis:spec:floor1-synth} - -Curve computation is split into two logical steps; the first step -derives final Y amplitude values from the encoded, wrapped difference -values taken from the bitstream. The second step plots the curve -lines. Also, although zero-difference values are used in the -iterative prediction to find final Y values, these points are -conditionally skipped during final line computation in step two. -Skipping zero-difference values allows a smoother line fit. - -Although some aspects of the below algorithm look like inconsequential -optimizations, implementors are warned to follow the details closely. -Deviation from implementing a strictly equivalent algorithm can result -in serious decoding errors. - -\begin{description} -\item[step 1: amplitude value synthesis] - -Unwrap the always-positive-or-zero values read from the packet into -+/- difference values, then apply to line prediction. - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [range] = vector \{ 256, 128, 86, 64 \} element ([floor1_multiplier]-1) - 2) vector [floor1_step2_flag] element [0] = set - 3) vector [floor1_step2_flag] element [1] = set - 4) vector [floor1_final_Y] element [0] = vector [floor1_Y] element [0] - 5) vector [floor1_final_Y] element [1] = vector [floor1_Y] element [1] - 6) iterate [i] over the range 2 ... [floor1_values]-1 \{ - - 7) [low_neighbor_offset] = \link{vorbis:spec:low:neighbor}{low_neighbor}([floor1_X_list],[i]) - 8) [high_neighbor_offset] = \link{vorbis:spec:high:neighbor}{high_neighbor}([floor1_X_list],[i]) - - 9) [predicted] = \link{vorbis:spec:render:point}{render_point}( vector [floor1_X_list] element [low_neighbor_offset], - vector [floor1_final_Y] element [low_neighbor_offset], - vector [floor1_X_list] element [high_neighbor_offset], - vector [floor1_final_Y] element [high_neighbor_offset], - vector [floor1_X_list] element [i] ) - - 10) [val] = vector [floor1_Y] element [i] - 11) [highroom] = [range] - [predicted] - 12) [lowroom] = [predicted] - 13) if ( [highroom] is less than [lowroom] ) \{ - - 14) [room] = [highroom] * 2 - - \} else [highroom] is not less than [lowroom] \{ - - 15) [room] = [lowroom] * 2 - - \} - - 16) if ( [val] is nonzero ) \{ - - 17) vector [floor1_step2_flag] element [low_neighbor_offset] = set - 18) vector [floor1_step2_flag] element [high_neighbor_offset] = set - 19) vector [floor1_step2_flag] element [i] = set - 20) if ( [val] is greater than or equal to [room] ) \{ - - 21) if ( [highroom] is greater than [lowroom] ) \{ - - 22) vector [floor1_final_Y] element [i] = [val] - [lowroom] + [predicted] - - \} else [highroom] is not greater than [lowroom] \{ - - 23) vector [floor1_final_Y] element [i] = [predicted] - [val] + [highroom] - 1 - - \} - - \} else [val] is less than [room] \{ - - 24) if ([val] is odd) \{ - - 25) vector [floor1_final_Y] element [i] = - [predicted] - (([val] + 1) divided by 2 using integer division) - - \} else [val] is even \{ - - 26) vector [floor1_final_Y] element [i] = - [predicted] + ([val] / 2 using integer division) - - \} - - \} - - \} else [val] is zero \{ - - 27) vector [floor1_step2_flag] element [i] = unset - 28) vector [floor1_final_Y] element [i] = [predicted] - - \} - - \} - - 29) done - -\end{Verbatim} - - - -\item[step 2: curve synthesis] - -Curve synthesis generates a return vector \varname{[floor]} of length -\varname{[n]} (where \varname{[n]} is provided by the decode process -calling to floor decode). Floor 1 curve synthesis makes use of the -\varname{[floor1_X_list]}, \varname{[floor1_final_Y]} and -\varname{[floor1_step2_flag]} vectors, as well as [floor1_multiplier] -and [floor1_values] values. - -Decode begins by sorting the scalars from vectors -\varname{[floor1_X_list]}, \varname{[floor1_final_Y]} and -\varname{[floor1_step2_flag]} together into new vectors -\varname{[floor1_X_list]'}, \varname{[floor1_final_Y]'} and -\varname{[floor1_step2_flag]'} according to ascending sort order of the -values in \varname{[floor1_X_list]}. That is, sort the values of -\varname{[floor1_X_list]} and then apply the same permutation to -elements of the other two vectors so that the X, Y and step2_flag -values still match. - -Then compute the final curve in one pass: - -\begin{Verbatim}[commandchars=\\\{\}] - 1) [hx] = 0 - 2) [lx] = 0 - 3) [ly] = vector [floor1_final_Y]' element [0] * [floor1_multiplier] - 4) iterate [i] over the range 1 ... [floor1_values]-1 \{ - - 5) if ( [floor1_step2_flag]' element [i] is set ) \{ - - 6) [hy] = [floor1_final_Y]' element [i] * [floor1_multiplier] - 7) [hx] = [floor1_X_list]' element [i] - 8) \link{vorbis:spec:render:line}{render_line}( [lx], [ly], [hx], [hy], [floor] ) - 9) [lx] = [hx] - 10) [ly] = [hy] - \} - \} - - 11) if ( [hx] is less than [n] ) \{ - - 12) \link{vorbis:spec:render:line}{render_line}( [hx], [hy], [n], [hy], [floor] ) - - \} - - 13) if ( [hx] is greater than [n] ) \{ - - 14) truncate vector [floor] to [n] elements - - \} - - 15) for each scalar in vector [floor], perform a lookup substitution using - the scalar value from [floor] as an offset into the vector \link{vorbis:spec:floor1:inverse:dB:table}{[floor1_inverse_dB_static_table]} - - 16) done - -\end{Verbatim} - -\end{description} diff --git a/ExternalLibs/libvorbis-1.3.1/doc/08-residue.tex b/ExternalLibs/libvorbis-1.3.1/doc/08-residue.tex deleted file mode 100644 index 767c1fa..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/08-residue.tex +++ /dev/null @@ -1,452 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Residue setup and decode} \label{vorbis:spec:residue} - -\subsection{Overview} - -A residue vector represents the fine detail of the audio spectrum of -one channel in an audio frame after the encoder subtracts the floor -curve and performs any channel coupling. A residue vector may -represent spectral lines, spectral magnitude, spectral phase or -hybrids as mixed by channel coupling. The exact semantic content of -the vector does not matter to the residue abstraction. - -Whatever the exact qualities, the Vorbis residue abstraction codes the -residue vectors into the bitstream packet, and then reconstructs the -vectors during decode. Vorbis makes use of three different encoding -variants (numbered 0, 1 and 2) of the same basic vector encoding -abstraction. - - - -\subsection{Residue format} - -Residue format partitions each vector in the vector bundle into chunks, -classifies each chunk, encodes the chunk classifications and finally -encodes the chunks themselves using the the specific VQ arrangement -defined for each selected classification. -The exact interleaving and partitioning vary by residue encoding number, -however the high-level process used to classify and encode the residue -vector is the same in all three variants. - -A set of coded residue vectors are all of the same length. High level -coding structure, ignoring for the moment exactly how a partition is -encoded and simply trusting that it is, is as follows: - -\begin{itemize} -\item Each vector is partitioned into multiple equal sized chunks -according to configuration specified. If we have a vector size of -\emph{n}, a partition size \emph{residue_partition_size}, and a total -of \emph{ch} residue vectors, the total number of partitioned chunks -coded is \emph{n}/\emph{residue_partition_size}*\emph{ch}. It is -important to note that the integer division truncates. In the below -example, we assume an example \emph{residue_partition_size} of 8. - -\item Each partition in each vector has a classification number that -specifies which of multiple configured VQ codebook setups are used to -decode that partition. The classification numbers of each partition -can be thought of as forming a vector in their own right, as in the -illustration below. Just as the residue vectors are coded in grouped -partitions to increase encoding efficiency, the classification vector -is also partitioned into chunks. The integer elements of each scalar -in a classification chunk are built into a single scalar that -represents the classification numbers in that chunk. In the below -example, the classification codeword encodes two classification -numbers. - -\item The values in a residue vector may be encoded monolithically in a -single pass through the residue vector, but more often efficient -codebook design dictates that each vector is encoded as the additive -sum of several passes through the residue vector using more than one -VQ codebook. Thus, each residue value potentially accumulates values -from multiple decode passes. The classification value associated with -a partition is the same in each pass, thus the classification codeword -is coded only in the first pass. - -\end{itemize} - - -\begin{center} -\includegraphics[width=\textwidth]{residue-pack} -\captionof{figure}{illustration of residue vector format} -\end{center} - - - -\subsection{residue 0} - -Residue 0 and 1 differ only in the way the values within a residue -partition are interleaved during partition encoding (visually treated -as a black box--or cyan box or brown box--in the above figure). - -Residue encoding 0 interleaves VQ encoding according to the -dimension of the codebook used to encode a partition in a specific -pass. The dimension of the codebook need not be the same in multiple -passes, however the partition size must be an even multiple of the -codebook dimension. - -As an example, assume a partition vector of size eight, to be encoded -by residue 0 using codebook sizes of 8, 4, 2 and 1: - -\begin{programlisting} - - original residue vector: [ 0 1 2 3 4 5 6 7 ] - -codebook dimensions = 8 encoded as: [ 0 1 2 3 4 5 6 7 ] - -codebook dimensions = 4 encoded as: [ 0 2 4 6 ], [ 1 3 5 7 ] - -codebook dimensions = 2 encoded as: [ 0 4 ], [ 1 5 ], [ 2 6 ], [ 3 7 ] - -codebook dimensions = 1 encoded as: [ 0 ], [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ], [ 7 ] - -\end{programlisting} - -It is worth mentioning at this point that no configurable value in the -residue coding setup is restricted to a power of two. - - - -\subsection{residue 1} - -Residue 1 does not interleave VQ encoding. It represents partition -vector scalars in order. As with residue 0, however, partition length -must be an integer multiple of the codebook dimension, although -dimension may vary from pass to pass. - -As an example, assume a partition vector of size eight, to be encoded -by residue 0 using codebook sizes of 8, 4, 2 and 1: - -\begin{programlisting} - - original residue vector: [ 0 1 2 3 4 5 6 7 ] - -codebook dimensions = 8 encoded as: [ 0 1 2 3 4 5 6 7 ] - -codebook dimensions = 4 encoded as: [ 0 1 2 3 ], [ 4 5 6 7 ] - -codebook dimensions = 2 encoded as: [ 0 1 ], [ 2 3 ], [ 4 5 ], [ 6 7 ] - -codebook dimensions = 1 encoded as: [ 0 ], [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ], [ 7 ] - -\end{programlisting} - - - -\subsection{residue 2} - -Residue type two can be thought of as a variant of residue type 1. -Rather than encoding multiple passed-in vectors as in residue type 1, -the \emph{ch} passed in vectors of length \emph{n} are first -interleaved and flattened into a single vector of length -\emph{ch}*\emph{n}. Encoding then proceeds as in type 1. Decoding is -as in type 1 with decode interleave reversed. If operating on a single -vector to begin with, residue type 1 and type 2 are equivalent. - -\begin{center} -\includegraphics[width=\textwidth]{residue2} -\captionof{figure}{illustration of residue type 2} -\end{center} - - -\subsection{Residue decode} - -\subsubsection{header decode} - -Header decode for all three residue types is identical. -\begin{programlisting} - 1) [residue_begin] = read 24 bits as unsigned integer - 2) [residue_end] = read 24 bits as unsigned integer - 3) [residue_partition_size] = read 24 bits as unsigned integer and add one - 4) [residue_classifications] = read 6 bits as unsigned integer and add one - 5) [residue_classbook] = read 8 bits as unsigned integer -\end{programlisting} - -\varname{[residue_begin]} and -\varname{[residue_end]} select the specific sub-portion of -each vector that is actually coded; it implements akin to a bandpass -where, for coding purposes, the vector effectively begins at element -\varname{[residue_begin]} and ends at -\varname{[residue_end]}. Preceding and following values in -the unpacked vectors are zeroed. Note that for residue type 2, these -values as well as \varname{[residue_partition_size]}apply to -the interleaved vector, not the individual vectors before interleave. -\varname{[residue_partition_size]} is as explained above, -\varname{[residue_classifications]} is the number of possible -classification to which a partition can belong and -\varname{[residue_classbook]} is the codebook number used to -code classification codewords. The number of dimensions in book -\varname{[residue_classbook]} determines how many -classification values are grouped into a single classification -codeword. Note that the number of entries and dimensions in book -\varname{[residue_classbook]}, along with -\varname{[residue_classifications]}, overdetermines to -possible number of classification codewords. -If \varname{[residue_classifications]}\^{}\varname{[residue_classbook]}.dimensions -exceeds \varname{[residue_classbook]}.entries, the -bitstream should be regarded to be undecodable. - -Next we read a bitmap pattern that specifies which partition classes -code values in which passes. - -\begin{programlisting} - 1) iterate [i] over the range 0 ... [residue_classifications]-1 { - - 2) [high_bits] = 0 - 3) [low_bits] = read 3 bits as unsigned integer - 4) [bitflag] = read one bit as boolean - 5) if ( [bitflag] is set ) then [high_bits] = read five bits as unsigned integer - 6) vector [residue_cascade] element [i] = [high_bits] * 8 + [low_bits] - } - 7) done -\end{programlisting} - -Finally, we read in a list of book numbers, each corresponding to -specific bit set in the cascade bitmap. We loop over the possible -codebook classifications and the maximum possible number of encoding -stages (8 in Vorbis I, as constrained by the elements of the cascade -bitmap being eight bits): - -\begin{programlisting} - 1) iterate [i] over the range 0 ... [residue_classifications]-1 { - - 2) iterate [j] over the range 0 ... 7 { - - 3) if ( vector [residue_cascade] element [i] bit [j] is set ) { - - 4) array [residue_books] element [i][j] = read 8 bits as unsigned integer - - } else { - - 5) array [residue_books] element [i][j] = unused - - } - } - } - - 6) done -\end{programlisting} - -An end-of-packet condition at any point in header decode renders the -stream undecodable. In addition, any codebook number greater than the -maximum numbered codebook set up in this stream also renders the -stream undecodable. All codebooks in array [residue_books] are -required to have a value mapping. The presence of codebook in array -[residue_books] without a value mapping (maptype equals zero) renders -the stream undecodable. - - - -\subsubsection{packet decode} - -Format 0 and 1 packet decode is identical except for specific -partition interleave. Format 2 packet decode can be built out of the -format 1 decode process. Thus we describe first the decode -infrastructure identical to all three formats. - -In addition to configuration information, the residue decode process -is passed the number of vectors in the submap bundle and a vector of -flags indicating if any of the vectors are not to be decoded. If the -passed in number of vectors is 3 and vector number 1 is marked 'do not -decode', decode skips vector 1 during the decode loop. However, even -'do not decode' vectors are allocated and zeroed. - -Depending on the values of \varname{[residue_begin]} and -\varname{[residue_end]}, it is obvious that the encoded -portion of a residue vector may be the entire possible residue vector -or some other strict subset of the actual residue vector size with -zero padding at either uncoded end. However, it is also possible to -set \varname{[residue_begin]} and -\varname{[residue_end]} to specify a range partially or -wholly beyond the maximum vector size. Before beginning residue -decode, limit \varname{[residue_begin]} and -\varname{[residue_end]} to the maximum possible vector size -as follows. We assume that the number of vectors being encoded, -\varname{[ch]} is provided by the higher level decoding -process. - -\begin{programlisting} - 1) [actual_size] = current blocksize/2; - 2) if residue encoding is format 2 - 3) [actual_size] = [actual_size] * [ch]; - 4) [limit_residue_begin] = maximum of ([residue_begin],[actual_size]); - 5) [limit_residue_end] = maximum of ([residue_end],[actual_size]); -\end{programlisting} - -The following convenience values are conceptually useful to clarifying -the decode process: - -\begin{programlisting} - 1) [classwords_per_codeword] = [codebook_dimensions] value of codebook [residue_classbook] - 2) [n_to_read] = [limit_residue_end] - [limit_residue_begin] - 3) [partitions_to_read] = [n_to_read] / [residue_partition_size] -\end{programlisting} - -Packet decode proceeds as follows, matching the description offered earlier in the document. -\begin{programlisting} - 1) allocate and zero all vectors that will be returned. - 2) if ([n_to_read] is zero), stop; there is no residue to decode. - 3) iterate [pass] over the range 0 ... 7 { - - 4) [partition_count] = 0 - - 5) while [partition_count] is less than [partitions_to_read] - - 6) if ([pass] is zero) { - - 7) iterate [j] over the range 0 .. [ch]-1 { - - 8) if vector [j] is not marked 'do not decode' { - - 9) [temp] = read from packet using codebook [residue_classbook] in scalar context - 10) iterate [i] descending over the range [classwords_per_codeword]-1 ... 0 { - - 11) array [classifications] element [j],([i]+[partition_count]) = - [temp] integer modulo [residue_classifications] - 12) [temp] = [temp] / [residue_classifications] using integer division - - } - - } - - } - - } - - 13) iterate [i] over the range 0 .. ([classwords_per_codeword] - 1) while [partition_count] - is also less than [partitions_to_read] { - - 14) iterate [j] over the range 0 .. [ch]-1 { - - 15) if vector [j] is not marked 'do not decode' { - - 16) [vqclass] = array [classifications] element [j],[partition_count] - 17) [vqbook] = array [residue_books] element [vqclass],[pass] - 18) if ([vqbook] is not 'unused') { - - 19) decode partition into output vector number [j], starting at scalar - offset [limit_residue_begin]+[partition_count]*[residue_partition_size] using - codebook number [vqbook] in VQ context - } - } - - 20) increment [partition_count] by one - - } - } - } - - 21) done - -\end{programlisting} - -An end-of-packet condition during packet decode is to be considered a -nominal occurrence. Decode returns the result of vector decode up to -that point. - - - -\subsubsection{format 0 specifics} - -Format zero decodes partitions exactly as described earlier in the -'Residue Format: residue 0' section. The following pseudocode -presents the same algorithm. Assume: - -\begin{itemize} -\item \varname{[n]} is the value in \varname{[residue_partition_size]} -\item \varname{[v]} is the residue vector -\item \varname{[offset]} is the beginning read offset in [v] -\end{itemize} - - -\begin{programlisting} - 1) [step] = [n] / [codebook_dimensions] - 2) iterate [i] over the range 0 ... [step]-1 { - - 3) vector [entry_temp] = read vector from packet using current codebook in VQ context - 4) iterate [j] over the range 0 ... [codebook_dimensions]-1 { - - 5) vector [v] element ([offset]+[i]+[j]*[step]) = - vector [v] element ([offset]+[i]+[j]*[step]) + - vector [entry_temp] element [j] - - } - - } - - 6) done - -\end{programlisting} - - - -\subsubsection{format 1 specifics} - -Format 1 decodes partitions exactly as described earlier in the -'Residue Format: residue 1' section. The following pseudocode -presents the same algorithm. Assume: - -\begin{itemize} -\item \varname{[n]} is the value in -\varname{[residue_partition_size]} -\item \varname{[v]} is the residue vector -\item \varname{[offset]} is the beginning read offset in [v] -\end{itemize} - - -\begin{programlisting} - 1) [i] = 0 - 2) vector [entry_temp] = read vector from packet using current codebook in VQ context - 3) iterate [j] over the range 0 ... [codebook_dimensions]-1 { - - 4) vector [v] element ([offset]+[i]) = - vector [v] element ([offset]+[i]) + - vector [entry_temp] element [j] - 5) increment [i] - - } - - 6) if ( [i] is less than [n] ) continue at step 2 - 7) done -\end{programlisting} - - - -\subsubsection{format 2 specifics} - -Format 2 is reducible to format 1. It may be implemented as an additional step prior to and an additional post-decode step after a normal format 1 decode. - - -Format 2 handles 'do not decode' vectors differently than residue 0 or -1; if all vectors are marked 'do not decode', no decode occurrs. -However, if at least one vector is to be decoded, all the vectors are -decoded. We then request normal format 1 to decode a single vector -representing all output channels, rather than a vector for each -channel. After decode, deinterleave the vector into independent vectors, one for each output channel. That is: - -\begin{enumerate} - \item If all vectors 0 through \emph{ch}-1 are marked 'do not decode', allocate and clear a single vector \varname{[v]}of length \emph{ch*n} and skip step 2 below; proceed directly to the post-decode step. - \item Rather than performing format 1 decode to produce \emph{ch} vectors of length \emph{n} each, call format 1 decode to produce a single vector \varname{[v]} of length \emph{ch*n}. - \item Post decode: Deinterleave the single vector \varname{[v]} returned by format 1 decode as described above into \emph{ch} independent vectors, one for each outputchannel, according to: - \begin{programlisting} - 1) iterate [i] over the range 0 ... [n]-1 { - - 2) iterate [j] over the range 0 ... [ch]-1 { - - 3) output vector number [j] element [i] = vector [v] element ([i] * [ch] + [j]) - - } - } - - 4) done - \end{programlisting} - -\end{enumerate} - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/09-helper.tex b/ExternalLibs/libvorbis-1.3.1/doc/09-helper.tex deleted file mode 100644 index 6e1bfe0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/09-helper.tex +++ /dev/null @@ -1,181 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Helper equations} \label{vorbis:spec:helper} - -\subsection{Overview} - -The equations below are used in multiple places by the Vorbis codec -specification. Rather than cluttering up the main specification -documents, they are defined here and referenced where appropriate. - - -\subsection{Functions} - -\subsubsection{ilog} \label{vorbis:spec:ilog} - -The "ilog(x)" function returns the position number (1 through n) of the highest set bit in the two's complement integer value -\varname{[x]}. Values of \varname{[x]} less than zero are defined to return zero. - -\begin{programlisting} - 1) [return_value] = 0; - 2) if ( [x] is greater than zero ) { - - 3) increment [return_value]; - 4) logical shift [x] one bit to the right, padding the MSb with zero - 5) repeat at step 2) - - } - - 6) done -\end{programlisting} - -Examples: - -\begin{itemize} - \item ilog(0) = 0; - \item ilog(1) = 1; - \item ilog(2) = 2; - \item ilog(3) = 2; - \item ilog(4) = 3; - \item ilog(7) = 3; - \item ilog(negative number) = 0; -\end{itemize} - - - - -\subsubsection{float32_unpack} \label{vorbis:spec:float32:unpack} - -"float32_unpack(x)" is intended to translate the packed binary -representation of a Vorbis codebook float value into the -representation used by the decoder for floating point numbers. For -purposes of this example, we will unpack a Vorbis float32 into a -host-native floating point number. - -\begin{programlisting} - 1) [mantissa] = [x] bitwise AND 0x1fffff (unsigned result) - 2) [sign] = [x] bitwise AND 0x80000000 (unsigned result) - 3) [exponent] = ( [x] bitwise AND 0x7fe00000) shifted right 21 bits (unsigned result) - 4) if ( [sign] is nonzero ) then negate [mantissa] - 5) return [mantissa] * ( 2 ^ ( [exponent] - 788 ) ) -\end{programlisting} - - - -\subsubsection{lookup1_values} \label{vorbis:spec:lookup1:values} - -"lookup1_values(codebook_entries,codebook_dimensions)" is used to -compute the correct length of the value index for a codebook VQ lookup -table of lookup type 1. The values on this list are permuted to -construct the VQ vector lookup table of size -\varname{[codebook_entries]}. - -The return value for this function is defined to be 'the greatest -integer value for which \varname{[return_value]} to the power of -\varname{[codebook_dimensions]} is less than or equal to -\varname{[codebook_entries]}'. - - - -\subsubsection{low_neighbor} \label{vorbis:spec:low:neighbor} - -"low_neighbor(v,x)" finds the position \varname{n} in vector \varname{[v]} of -the greatest value scalar element for which \varname{n} is less than -\varname{[x]} and vector \varname{[v]} element \varname{n} is less -than vector \varname{[v]} element \varname{[x]}. - -\subsubsection{high_neighbor} \label{vorbis:spec:high:neighbor} - -"high_neighbor(v,x)" finds the position \varname{n} in vector [v] of -the lowest value scalar element for which \varname{n} is less than -\varname{[x]} and vector \varname{[v]} element \varname{n} is greater -than vector \varname{[v]} element \varname{[x]}. - - - -\subsubsection{render_point} \label{vorbis:spec:render:point} - -"render_point(x0,y0,x1,y1,X)" is used to find the Y value at point X -along the line specified by x0, x1, y0 and y1. This function uses an -integer algorithm to solve for the point directly without calculating -intervening values along the line. - -\begin{programlisting} - 1) [dy] = [y1] - [y0] - 2) [adx] = [x1] - [x0] - 3) [ady] = absolute value of [dy] - 4) [err] = [ady] * ([X] - [x0]) - 5) [off] = [err] / [adx] using integer division - 6) if ( [dy] is less than zero ) { - - 7) [Y] = [y0] - [off] - - } else { - - 8) [Y] = [y0] + [off] - - } - - 9) done -\end{programlisting} - - - -\subsubsection{render_line} \label{vorbis:spec:render:line} - -Floor decode type one uses the integer line drawing algorithm of -"render_line(x0, y0, x1, y1, v)" to construct an integer floor -curve for contiguous piecewise line segments. Note that it has not -been relevant elsewhere, but here we must define integer division as -rounding division of both positive and negative numbers toward zero. - - -\begin{programlisting} - 1) [dy] = [y1] - [y0] - 2) [adx] = [x1] - [x0] - 3) [ady] = absolute value of [dy] - 4) [base] = [dy] / [adx] using integer division - 5) [x] = [x0] - 6) [y] = [y0] - 7) [err] = 0 - - 8) if ( [dy] is less than 0 ) { - - 9) [sy] = [base] - 1 - - } else { - - 10) [sy] = [base] + 1 - - } - - 11) [ady] = [ady] - (absolute value of [base]) * [adx] - 12) vector [v] element [x] = [y] - - 13) iterate [x] over the range [x0]+1 ... [x1]-1 { - - 14) [err] = [err] + [ady]; - 15) if ( [err] >= [adx] ) { - - 16) [err] = [err] - [adx] - 17) [y] = [y] + [sy] - - } else { - - 18) [y] = [y] + [base] - - } - - 19) vector [v] element [x] = [y] - - } -\end{programlisting} - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/10-tables.tex b/ExternalLibs/libvorbis-1.3.1/doc/10-tables.tex deleted file mode 100644 index 2106a46..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/10-tables.tex +++ /dev/null @@ -1,77 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Tables} \label{vorbis:spec:tables} - -\subsection{floor1\_inverse\_dB\_table} \label{vorbis:spec:floor1:inverse:dB:table} - -The vector \varname{[floor1_inverse_dB_table]} is a 256 element static -lookup table consiting of the following values (read left to right -then top to bottom): - -\begin{Verbatim} - 1.0649863e-07, 1.1341951e-07, 1.2079015e-07, 1.2863978e-07, - 1.3699951e-07, 1.4590251e-07, 1.5538408e-07, 1.6548181e-07, - 1.7623575e-07, 1.8768855e-07, 1.9988561e-07, 2.1287530e-07, - 2.2670913e-07, 2.4144197e-07, 2.5713223e-07, 2.7384213e-07, - 2.9163793e-07, 3.1059021e-07, 3.3077411e-07, 3.5226968e-07, - 3.7516214e-07, 3.9954229e-07, 4.2550680e-07, 4.5315863e-07, - 4.8260743e-07, 5.1396998e-07, 5.4737065e-07, 5.8294187e-07, - 6.2082472e-07, 6.6116941e-07, 7.0413592e-07, 7.4989464e-07, - 7.9862701e-07, 8.5052630e-07, 9.0579828e-07, 9.6466216e-07, - 1.0273513e-06, 1.0941144e-06, 1.1652161e-06, 1.2409384e-06, - 1.3215816e-06, 1.4074654e-06, 1.4989305e-06, 1.5963394e-06, - 1.7000785e-06, 1.8105592e-06, 1.9282195e-06, 2.0535261e-06, - 2.1869758e-06, 2.3290978e-06, 2.4804557e-06, 2.6416497e-06, - 2.8133190e-06, 2.9961443e-06, 3.1908506e-06, 3.3982101e-06, - 3.6190449e-06, 3.8542308e-06, 4.1047004e-06, 4.3714470e-06, - 4.6555282e-06, 4.9580707e-06, 5.2802740e-06, 5.6234160e-06, - 5.9888572e-06, 6.3780469e-06, 6.7925283e-06, 7.2339451e-06, - 7.7040476e-06, 8.2047000e-06, 8.7378876e-06, 9.3057248e-06, - 9.9104632e-06, 1.0554501e-05, 1.1240392e-05, 1.1970856e-05, - 1.2748789e-05, 1.3577278e-05, 1.4459606e-05, 1.5399272e-05, - 1.6400004e-05, 1.7465768e-05, 1.8600792e-05, 1.9809576e-05, - 2.1096914e-05, 2.2467911e-05, 2.3928002e-05, 2.5482978e-05, - 2.7139006e-05, 2.8902651e-05, 3.0780908e-05, 3.2781225e-05, - 3.4911534e-05, 3.7180282e-05, 3.9596466e-05, 4.2169667e-05, - 4.4910090e-05, 4.7828601e-05, 5.0936773e-05, 5.4246931e-05, - 5.7772202e-05, 6.1526565e-05, 6.5524908e-05, 6.9783085e-05, - 7.4317983e-05, 7.9147585e-05, 8.4291040e-05, 8.9768747e-05, - 9.5602426e-05, 0.00010181521, 0.00010843174, 0.00011547824, - 0.00012298267, 0.00013097477, 0.00013948625, 0.00014855085, - 0.00015820453, 0.00016848555, 0.00017943469, 0.00019109536, - 0.00020351382, 0.00021673929, 0.00023082423, 0.00024582449, - 0.00026179955, 0.00027881276, 0.00029693158, 0.00031622787, - 0.00033677814, 0.00035866388, 0.00038197188, 0.00040679456, - 0.00043323036, 0.00046138411, 0.00049136745, 0.00052329927, - 0.00055730621, 0.00059352311, 0.00063209358, 0.00067317058, - 0.00071691700, 0.00076350630, 0.00081312324, 0.00086596457, - 0.00092223983, 0.00098217216, 0.0010459992, 0.0011139742, - 0.0011863665, 0.0012634633, 0.0013455702, 0.0014330129, - 0.0015261382, 0.0016253153, 0.0017309374, 0.0018434235, - 0.0019632195, 0.0020908006, 0.0022266726, 0.0023713743, - 0.0025254795, 0.0026895994, 0.0028643847, 0.0030505286, - 0.0032487691, 0.0034598925, 0.0036847358, 0.0039241906, - 0.0041792066, 0.0044507950, 0.0047400328, 0.0050480668, - 0.0053761186, 0.0057254891, 0.0060975636, 0.0064938176, - 0.0069158225, 0.0073652516, 0.0078438871, 0.0083536271, - 0.0088964928, 0.009474637, 0.010090352, 0.010746080, - 0.011444421, 0.012188144, 0.012980198, 0.013823725, - 0.014722068, 0.015678791, 0.016697687, 0.017782797, - 0.018938423, 0.020169149, 0.021479854, 0.022875735, - 0.024362330, 0.025945531, 0.027631618, 0.029427276, - 0.031339626, 0.033376252, 0.035545228, 0.037855157, - 0.040315199, 0.042935108, 0.045725273, 0.048696758, - 0.051861348, 0.055231591, 0.058820850, 0.062643361, - 0.066714279, 0.071049749, 0.075666962, 0.080584227, - 0.085821044, 0.091398179, 0.097337747, 0.10366330, - 0.11039993, 0.11757434, 0.12521498, 0.13335215, - 0.14201813, 0.15124727, 0.16107617, 0.17154380, - 0.18269168, 0.19456402, 0.20720788, 0.22067342, - 0.23501402, 0.25028656, 0.26655159, 0.28387361, - 0.30232132, 0.32196786, 0.34289114, 0.36517414, - 0.38890521, 0.41417847, 0.44109412, 0.46975890, - 0.50028648, 0.53279791, 0.56742212, 0.60429640, - 0.64356699, 0.68538959, 0.72993007, 0.77736504, - 0.82788260, 0.88168307, 0.9389798, 1. -\end{Verbatim} diff --git a/ExternalLibs/libvorbis-1.3.1/doc/Doxyfile.in b/ExternalLibs/libvorbis-1.3.1/doc/Doxyfile.in deleted file mode 100644 index cdb894f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/Doxyfile.in +++ /dev/null @@ -1,1142 +0,0 @@ -# Doxyfile 1.3.7 - -# This file describes the settings to be used by the documentation system -# doxygen (www.doxygen.org) for a project -# -# All text after a hash (#) is considered a comment and will be ignored -# The format is: -# TAG = value [value, ...] -# For lists items can also be appended using: -# TAG += value [value, ...] -# Values that contain spaces should be placed between quotes (" ") - -#--------------------------------------------------------------------------- -# Project related configuration options -#--------------------------------------------------------------------------- - -# The PROJECT_NAME tag is a single word (or a sequence of words surrounded -# by quotes) that should identify the project. - -PROJECT_NAME = @PACKAGE@ - -# The PROJECT_NUMBER tag can be used to enter a project or revision number. -# This could be handy for archiving the generated documentation or -# if some version control system is used. - -PROJECT_NUMBER = @VERSION@ - -# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) -# base path where the generated documentation will be put. -# If a relative path is entered, it will be relative to the location -# where doxygen was started. If left blank the current directory will be used. - -OUTPUT_DIRECTORY = vorbis - -# If the CREATE_SUBDIRS tag is set to YES, then doxygen will create -# 2 levels of 10 sub-directories under the output directory of each output -# format and will distribute the generated files over these directories. -# Enabling this option can be useful when feeding doxygen a huge amount of source -# files, where putting all generated files in the same directory would otherwise -# cause performance problems for the file system. - -CREATE_SUBDIRS = NO - -# The OUTPUT_LANGUAGE tag is used to specify the language in which all -# documentation generated by doxygen is written. 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Separate the files or directories -# with spaces. - -INPUT = @top_srcdir@/include/vorbis - -# If the value of the INPUT tag contains directories, you can use the -# FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp -# and *.h) to filter out the source-files in the directories. If left -# blank the following patterns are tested: -# *.c *.cc *.cxx *.cpp *.c++ *.java *.ii *.ixx *.ipp *.i++ *.inl *.h *.hh *.hxx *.hpp -# *.h++ *.idl *.odl *.cs *.php *.php3 *.inc *.m *.mm - -FILE_PATTERNS = - -# The RECURSIVE tag can be used to turn specify whether or not subdirectories -# should be searched for input files as well. Possible values are YES and NO. -# If left blank NO is used. - -RECURSIVE = NO - -# The EXCLUDE tag can be used to specify files and/or directories that should -# excluded from the INPUT source files. This way you can easily exclude a -# subdirectory from a directory tree whose root is specified with the INPUT tag. - -EXCLUDE = - -# The EXCLUDE_SYMLINKS tag can be used select whether or not files or directories -# that are symbolic links (a Unix filesystem feature) are excluded from the input. - -EXCLUDE_SYMLINKS = NO - -# If the value of the INPUT tag contains directories, you can use the -# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude -# certain files from those directories. - -EXCLUDE_PATTERNS = - -# The EXAMPLE_PATH tag can be used to specify one or more files or -# directories that contain example code fragments that are included (see -# the \include command). - -EXAMPLE_PATH = - -# If the value of the EXAMPLE_PATH tag contains directories, you can use the -# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp -# and *.h) to filter out the source-files in the directories. If left -# blank all files are included. - -EXAMPLE_PATTERNS = - -# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be -# searched for input files to be used with the \include or \dontinclude -# commands irrespective of the value of the RECURSIVE tag. -# Possible values are YES and NO. If left blank NO is used. - -EXAMPLE_RECURSIVE = NO - -# The IMAGE_PATH tag can be used to specify one or more files or -# directories that contain image that are included in the documentation (see -# the \image command). - -IMAGE_PATH = - -# The INPUT_FILTER tag can be used to specify a program that doxygen should -# invoke to filter for each input file. Doxygen will invoke the filter program -# by executing (via popen()) the command , where -# is the value of the INPUT_FILTER tag, and is the name of an -# input file. Doxygen will then use the output that the filter program writes -# to standard output. - -INPUT_FILTER = - -# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using -# INPUT_FILTER) will be used to filter the input files when producing source -# files to browse (i.e. when SOURCE_BROWSER is set to YES). - -FILTER_SOURCE_FILES = NO - -#--------------------------------------------------------------------------- -# configuration options related to source browsing -#--------------------------------------------------------------------------- - -# If the SOURCE_BROWSER tag is set to YES then a list of source files will -# be generated. Documented entities will be cross-referenced with these sources. -# Note: To get rid of all source code in the generated output, make sure also -# VERBATIM_HEADERS is set to NO. - -SOURCE_BROWSER = NO - -# Setting the INLINE_SOURCES tag to YES will include the body -# of functions and classes directly in the documentation. - -INLINE_SOURCES = NO - -# Setting the STRIP_CODE_COMMENTS tag to YES (the default) will instruct -# doxygen to hide any special comment blocks from generated source code -# fragments. Normal C and C++ comments will always remain visible. - -STRIP_CODE_COMMENTS = YES - -# If the REFERENCED_BY_RELATION tag is set to YES (the default) -# then for each documented function all documented -# functions referencing it will be listed. - -REFERENCED_BY_RELATION = YES - -# If the REFERENCES_RELATION tag is set to YES (the default) -# then for each documented function all documented entities -# called/used by that function will be listed. - -REFERENCES_RELATION = YES - -# If the VERBATIM_HEADERS tag is set to YES (the default) then Doxygen -# will generate a verbatim copy of the header file for each class for -# which an include is specified. Set to NO to disable this. - -VERBATIM_HEADERS = YES - -#--------------------------------------------------------------------------- -# configuration options related to the alphabetical class index -#--------------------------------------------------------------------------- - -# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index -# of all compounds will be generated. Enable this if the project -# contains a lot of classes, structs, unions or interfaces. - -ALPHABETICAL_INDEX = NO - -# If the alphabetical index is enabled (see ALPHABETICAL_INDEX) then -# the COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns -# in which this list will be split (can be a number in the range [1..20]) - -COLS_IN_ALPHA_INDEX = 5 - -# In case all classes in a project start with a common prefix, all -# classes will be put under the same header in the alphabetical index. -# The IGNORE_PREFIX tag can be used to specify one or more prefixes that -# should be ignored while generating the index headers. - -IGNORE_PREFIX = - -#--------------------------------------------------------------------------- -# configuration options related to the HTML output -#--------------------------------------------------------------------------- - -# If the GENERATE_HTML tag is set to YES (the default) Doxygen will -# generate HTML output. - -GENERATE_HTML = YES - -# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `html' will be used as the default path. - -HTML_OUTPUT = html - -# The HTML_FILE_EXTENSION tag can be used to specify the file extension for -# each generated HTML page (for example: .htm,.php,.asp). If it is left blank -# doxygen will generate files with .html extension. - -HTML_FILE_EXTENSION = .html - -# The HTML_HEADER tag can be used to specify a personal HTML header for -# each generated HTML page. If it is left blank doxygen will generate a -# standard header. - -HTML_HEADER = - -# The HTML_FOOTER tag can be used to specify a personal HTML footer for -# each generated HTML page. If it is left blank doxygen will generate a -# standard footer. - -HTML_FOOTER = - -# The HTML_STYLESHEET tag can be used to specify a user-defined cascading -# style sheet that is used by each HTML page. It can be used to -# fine-tune the look of the HTML output. If the tag is left blank doxygen -# will generate a default style sheet. Note that doxygen will try to copy -# the style sheet file to the HTML output directory, so don't put your own -# stylesheet in the HTML output directory as well, or it will be erased! - -HTML_STYLESHEET = - -# If the HTML_ALIGN_MEMBERS tag is set to YES, the members of classes, -# files or namespaces will be aligned in HTML using tables. If set to -# NO a bullet list will be used. - -HTML_ALIGN_MEMBERS = YES - -# If the GENERATE_HTMLHELP tag is set to YES, additional index files -# will be generated that can be used as input for tools like the -# Microsoft HTML help workshop to generate a compressed HTML help file (.chm) -# of the generated HTML documentation. - -GENERATE_HTMLHELP = NO - -# If the GENERATE_HTMLHELP tag is set to YES, the CHM_FILE tag can -# be used to specify the file name of the resulting .chm file. You -# can add a path in front of the file if the result should not be -# written to the html output directory. - -CHM_FILE = - -# If the GENERATE_HTMLHELP tag is set to YES, the HHC_LOCATION tag can -# be used to specify the location (absolute path including file name) of -# the HTML help compiler (hhc.exe). If non-empty doxygen will try to run -# the HTML help compiler on the generated index.hhp. - -HHC_LOCATION = - -# If the GENERATE_HTMLHELP tag is set to YES, the GENERATE_CHI flag -# controls if a separate .chi index file is generated (YES) or that -# it should be included in the master .chm file (NO). - -GENERATE_CHI = NO - -# If the GENERATE_HTMLHELP tag is set to YES, the BINARY_TOC flag -# controls whether a binary table of contents is generated (YES) or a -# normal table of contents (NO) in the .chm file. - -BINARY_TOC = NO - -# The TOC_EXPAND flag can be set to YES to add extra items for group members -# to the contents of the HTML help documentation and to the tree view. - -TOC_EXPAND = NO - -# The DISABLE_INDEX tag can be used to turn on/off the condensed index at -# top of each HTML page. The value NO (the default) enables the index and -# the value YES disables it. - -DISABLE_INDEX = NO - -# This tag can be used to set the number of enum values (range [1..20]) -# that doxygen will group on one line in the generated HTML documentation. - -ENUM_VALUES_PER_LINE = 4 - -# If the GENERATE_TREEVIEW tag is set to YES, a side panel will be -# generated containing a tree-like index structure (just like the one that -# is generated for HTML Help). For this to work a browser that supports -# JavaScript, DHTML, CSS and frames is required (for instance Mozilla 1.0+, -# Netscape 6.0+, Internet explorer 5.0+, or Konqueror). Windows users are -# probably better off using the HTML help feature. - -GENERATE_TREEVIEW = NO - -# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be -# used to set the initial width (in pixels) of the frame in which the tree -# is shown. - -TREEVIEW_WIDTH = 250 - -#--------------------------------------------------------------------------- -# configuration options related to the LaTeX output -#--------------------------------------------------------------------------- - -# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will -# generate Latex output. - -GENERATE_LATEX = YES - -# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `latex' will be used as the default path. - -LATEX_OUTPUT = latex - -# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be -# invoked. If left blank `latex' will be used as the default command name. - -LATEX_CMD_NAME = latex - -# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to -# generate index for LaTeX. If left blank `makeindex' will be used as the -# default command name. - -MAKEINDEX_CMD_NAME = makeindex - -# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact -# LaTeX documents. This may be useful for small projects and may help to -# save some trees in general. - -COMPACT_LATEX = NO - -# The PAPER_TYPE tag can be used to set the paper type that is used -# by the printer. Possible values are: a4, a4wide, letter, legal and -# executive. If left blank a4wide will be used. - -PAPER_TYPE = a4wide - -# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX -# packages that should be included in the LaTeX output. - -EXTRA_PACKAGES = - -# The LATEX_HEADER tag can be used to specify a personal LaTeX header for -# the generated latex document. The header should contain everything until -# the first chapter. If it is left blank doxygen will generate a -# standard header. Notice: only use this tag if you know what you are doing! - -LATEX_HEADER = - -# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated -# is prepared for conversion to pdf (using ps2pdf). The pdf file will -# contain links (just like the HTML output) instead of page references -# This makes the output suitable for online browsing using a pdf viewer. - -PDF_HYPERLINKS = NO - -# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of -# plain latex in the generated Makefile. Set this option to YES to get a -# higher quality PDF documentation. - -USE_PDFLATEX = NO - -# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode. -# command to the generated LaTeX files. This will instruct LaTeX to keep -# running if errors occur, instead of asking the user for help. -# This option is also used when generating formulas in HTML. - -LATEX_BATCHMODE = NO - -# If LATEX_HIDE_INDICES is set to YES then doxygen will not -# include the index chapters (such as File Index, Compound Index, etc.) -# in the output. - -LATEX_HIDE_INDICES = NO - -#--------------------------------------------------------------------------- -# configuration options related to the RTF output -#--------------------------------------------------------------------------- - -# If the GENERATE_RTF tag is set to YES Doxygen will generate RTF output -# The RTF output is optimized for Word 97 and may not look very pretty with -# other RTF readers or editors. - -GENERATE_RTF = NO - -# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `rtf' will be used as the default path. - -RTF_OUTPUT = rtf - -# If the COMPACT_RTF tag is set to YES Doxygen generates more compact -# RTF documents. This may be useful for small projects and may help to -# save some trees in general. - -COMPACT_RTF = NO - -# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated -# will contain hyperlink fields. The RTF file will -# contain links (just like the HTML output) instead of page references. -# This makes the output suitable for online browsing using WORD or other -# programs which support those fields. -# Note: wordpad (write) and others do not support links. - -RTF_HYPERLINKS = NO - -# Load stylesheet definitions from file. Syntax is similar to doxygen's -# config file, i.e. a series of assignments. You only have to provide -# replacements, missing definitions are set to their default value. - -RTF_STYLESHEET_FILE = - -# Set optional variables used in the generation of an rtf document. -# Syntax is similar to doxygen's config file. - -RTF_EXTENSIONS_FILE = - -#--------------------------------------------------------------------------- -# configuration options related to the man page output -#--------------------------------------------------------------------------- - -# If the GENERATE_MAN tag is set to YES (the default) Doxygen will -# generate man pages - -GENERATE_MAN = NO - -# The MAN_OUTPUT tag is used to specify where the man pages will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `man' will be used as the default path. - -MAN_OUTPUT = man - -# The MAN_EXTENSION tag determines the extension that is added to -# the generated man pages (default is the subroutine's section .3) - -MAN_EXTENSION = .3 - -# If the MAN_LINKS tag is set to YES and Doxygen generates man output, -# then it will generate one additional man file for each entity -# documented in the real man page(s). These additional files -# only source the real man page, but without them the man command -# would be unable to find the correct page. The default is NO. - -MAN_LINKS = NO - -#--------------------------------------------------------------------------- -# configuration options related to the XML output -#--------------------------------------------------------------------------- - -# If the GENERATE_XML tag is set to YES Doxygen will -# generate an XML file that captures the structure of -# the code including all documentation. - -GENERATE_XML = NO - -# The XML_OUTPUT tag is used to specify where the XML pages will be put. -# If a relative path is entered the value of OUTPUT_DIRECTORY will be -# put in front of it. If left blank `xml' will be used as the default path. - -XML_OUTPUT = xml - -# The XML_SCHEMA tag can be used to specify an XML schema, -# which can be used by a validating XML parser to check the -# syntax of the XML files. - -XML_SCHEMA = - -# The XML_DTD tag can be used to specify an XML DTD, -# which can be used by a validating XML parser to check the -# syntax of the XML files. - -XML_DTD = - -# If the XML_PROGRAMLISTING tag is set to YES Doxygen will -# dump the program listings (including syntax highlighting -# and cross-referencing information) to the XML output. Note that -# enabling this will significantly increase the size of the XML output. - -XML_PROGRAMLISTING = YES - -#--------------------------------------------------------------------------- -# configuration options for the AutoGen Definitions output -#--------------------------------------------------------------------------- - -# If the GENERATE_AUTOGEN_DEF tag is set to YES Doxygen will -# generate an AutoGen Definitions (see autogen.sf.net) file -# that captures the structure of the code including all -# documentation. Note that this feature is still experimental -# and incomplete at the moment. - -GENERATE_AUTOGEN_DEF = NO - -#--------------------------------------------------------------------------- -# configuration options related to the Perl module output -#--------------------------------------------------------------------------- - -# If the GENERATE_PERLMOD tag is set to YES Doxygen will -# generate a Perl module file that captures the structure of -# the code including all documentation. Note that this -# feature is still experimental and incomplete at the -# moment. - -GENERATE_PERLMOD = NO - -# If the PERLMOD_LATEX tag is set to YES Doxygen will generate -# the necessary Makefile rules, Perl scripts and LaTeX code to be able -# to generate PDF and DVI output from the Perl module output. - -PERLMOD_LATEX = NO - -# If the PERLMOD_PRETTY tag is set to YES the Perl module output will be -# nicely formatted so it can be parsed by a human reader. This is useful -# if you want to understand what is going on. On the other hand, if this -# tag is set to NO the size of the Perl module output will be much smaller -# and Perl will parse it just the same. - -PERLMOD_PRETTY = YES - -# The names of the make variables in the generated doxyrules.make file -# are prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. -# This is useful so different doxyrules.make files included by the same -# Makefile don't overwrite each other's variables. - -PERLMOD_MAKEVAR_PREFIX = - -#--------------------------------------------------------------------------- -# Configuration options related to the preprocessor -#--------------------------------------------------------------------------- - -# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will -# evaluate all C-preprocessor directives found in the sources and include -# files. - -ENABLE_PREPROCESSING = YES - -# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro -# names in the source code. If set to NO (the default) only conditional -# compilation will be performed. Macro expansion can be done in a controlled -# way by setting EXPAND_ONLY_PREDEF to YES. - -MACRO_EXPANSION = NO - -# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES -# then the macro expansion is limited to the macros specified with the -# PREDEFINED and EXPAND_AS_PREDEFINED tags. - -EXPAND_ONLY_PREDEF = NO - -# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files -# in the INCLUDE_PATH (see below) will be search if a #include is found. - -SEARCH_INCLUDES = YES - -# The INCLUDE_PATH tag can be used to specify one or more directories that -# contain include files that are not input files but should be processed by -# the preprocessor. - -INCLUDE_PATH = - -# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard -# patterns (like *.h and *.hpp) to filter out the header-files in the -# directories. If left blank, the patterns specified with FILE_PATTERNS will -# be used. - -INCLUDE_FILE_PATTERNS = - -# The PREDEFINED tag can be used to specify one or more macro names that -# are defined before the preprocessor is started (similar to the -D option of -# gcc). The argument of the tag is a list of macros of the form: name -# or name=definition (no spaces). If the definition and the = are -# omitted =1 is assumed. - -PREDEFINED = - -# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then -# this tag can be used to specify a list of macro names that should be expanded. -# The macro definition that is found in the sources will be used. -# Use the PREDEFINED tag if you want to use a different macro definition. - -EXPAND_AS_DEFINED = - -# If the SKIP_FUNCTION_MACROS tag is set to YES (the default) then -# doxygen's preprocessor will remove all function-like macros that are alone -# on a line, have an all uppercase name, and do not end with a semicolon. Such -# function macros are typically used for boiler-plate code, and will confuse the -# parser if not removed. - -SKIP_FUNCTION_MACROS = YES - -#--------------------------------------------------------------------------- -# Configuration::additions related to external references -#--------------------------------------------------------------------------- - -# The TAGFILES option can be used to specify one or more tagfiles. -# Optionally an initial location of the external documentation -# can be added for each tagfile. The format of a tag file without -# this location is as follows: -# TAGFILES = file1 file2 ... -# Adding location for the tag files is done as follows: -# TAGFILES = file1=loc1 "file2 = loc2" ... -# where "loc1" and "loc2" can be relative or absolute paths or -# URLs. If a location is present for each tag, the installdox tool -# does not have to be run to correct the links. -# Note that each tag file must have a unique name -# (where the name does NOT include the path) -# If a tag file is not located in the directory in which doxygen -# is run, you must also specify the path to the tagfile here. - -TAGFILES = - -# When a file name is specified after GENERATE_TAGFILE, doxygen will create -# a tag file that is based on the input files it reads. - -GENERATE_TAGFILE = - -# If the ALLEXTERNALS tag is set to YES all external classes will be listed -# in the class index. If set to NO only the inherited external classes -# will be listed. - -ALLEXTERNALS = NO - -# If the EXTERNAL_GROUPS tag is set to YES all external groups will be listed -# in the modules index. If set to NO, only the current project's groups will -# be listed. - -EXTERNAL_GROUPS = YES - -# The PERL_PATH should be the absolute path and name of the perl script -# interpreter (i.e. the result of `which perl'). - -PERL_PATH = /usr/bin/perl - -#--------------------------------------------------------------------------- -# Configuration options related to the dot tool -#--------------------------------------------------------------------------- - -# If the CLASS_DIAGRAMS tag is set to YES (the default) Doxygen will -# generate a inheritance diagram (in HTML, RTF and LaTeX) for classes with base or -# super classes. Setting the tag to NO turns the diagrams off. Note that this -# option is superseded by the HAVE_DOT option below. This is only a fallback. It is -# recommended to install and use dot, since it yields more powerful graphs. - -CLASS_DIAGRAMS = YES - -# If set to YES, the inheritance and collaboration graphs will hide -# inheritance and usage relations if the target is undocumented -# or is not a class. - -HIDE_UNDOC_RELATIONS = YES - -# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is -# available from the path. This tool is part of Graphviz, a graph visualization -# toolkit from AT&T and Lucent Bell Labs. The other options in this section -# have no effect if this option is set to NO (the default) - -HAVE_DOT = NO - -# If the CLASS_GRAPH and HAVE_DOT tags are set to YES then doxygen -# will generate a graph for each documented class showing the direct and -# indirect inheritance relations. Setting this tag to YES will force the -# the CLASS_DIAGRAMS tag to NO. - -CLASS_GRAPH = YES - -# If the COLLABORATION_GRAPH and HAVE_DOT tags are set to YES then doxygen -# will generate a graph for each documented class showing the direct and -# indirect implementation dependencies (inheritance, containment, and -# class references variables) of the class with other documented classes. - -COLLABORATION_GRAPH = YES - -# If the UML_LOOK tag is set to YES doxygen will generate inheritance and -# collaboration diagrams in a style similar to the OMG's Unified Modeling -# Language. - -UML_LOOK = NO - -# If set to YES, the inheritance and collaboration graphs will show the -# relations between templates and their instances. - -TEMPLATE_RELATIONS = NO - -# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDE_GRAPH, and HAVE_DOT -# tags are set to YES then doxygen will generate a graph for each documented -# file showing the direct and indirect include dependencies of the file with -# other documented files. - -INCLUDE_GRAPH = YES - -# If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and -# HAVE_DOT tags are set to YES then doxygen will generate a graph for each -# documented header file showing the documented files that directly or -# indirectly include this file. - -INCLUDED_BY_GRAPH = YES - -# If the CALL_GRAPH and HAVE_DOT tags are set to YES then doxygen will -# generate a call dependency graph for every global function or class method. -# Note that enabling this option will significantly increase the time of a run. -# So in most cases it will be better to enable call graphs for selected -# functions only using the \callgraph command. - -CALL_GRAPH = NO - -# If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen -# will graphical hierarchy of all classes instead of a textual one. - -GRAPHICAL_HIERARCHY = YES - -# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images -# generated by dot. Possible values are png, jpg, or gif -# If left blank png will be used. - -DOT_IMAGE_FORMAT = png - -# The tag DOT_PATH can be used to specify the path where the dot tool can be -# found. If left blank, it is assumed the dot tool can be found on the path. - -DOT_PATH = - -# The DOTFILE_DIRS tag can be used to specify one or more directories that -# contain dot files that are included in the documentation (see the -# \dotfile command). - -DOTFILE_DIRS = - -# The MAX_DOT_GRAPH_WIDTH tag can be used to set the maximum allowed width -# (in pixels) of the graphs generated by dot. If a graph becomes larger than -# this value, doxygen will try to truncate the graph, so that it fits within -# the specified constraint. Beware that most browsers cannot cope with very -# large images. -#This tag is now obsolete, according to doxygen 1.5.2 -#MAX_DOT_GRAPH_WIDTH = 1024 - -# The MAX_DOT_GRAPH_HEIGHT tag can be used to set the maximum allows height -# (in pixels) of the graphs generated by dot. If a graph becomes larger than -# this value, doxygen will try to truncate the graph, so that it fits within -# the specified constraint. Beware that most browsers cannot cope with very -# large images. -#This tag is now obsolete, according to doxygen 1.5.2 -#MAX_DOT_GRAPH_HEIGHT = 1024 - -# The MAX_DOT_GRAPH_DEPTH tag can be used to set the maximum depth of the -# graphs generated by dot. A depth value of 3 means that only nodes reachable -# from the root by following a path via at most 3 edges will be shown. Nodes that -# lay further from the root node will be omitted. Note that setting this option to -# 1 or 2 may greatly reduce the computation time needed for large code bases. 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If set to NO the values of all tags below this one will be ignored. - -SEARCHENGINE = NO diff --git a/ExternalLibs/libvorbis-1.3.1/doc/Makefile.am b/ExternalLibs/libvorbis-1.3.1/doc/Makefile.am deleted file mode 100644 index 2837a2c..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/Makefile.am +++ /dev/null @@ -1,149 +0,0 @@ -## Process this with automake to create Makefile.in - -SUBDIRS = vorbisfile vorbisenc - -docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION) - -### all of the static docs, commited to SVN and included as is -static_docs = \ - rfc5215.xml \ - rfc5215.txt \ - eightphase.png \ - evenlsp.png \ - fish_xiph_org.png \ - floor1_inverse_dB_table.html \ - floorval.png \ - fourphase.png \ - framing.html \ - helper.html \ - index.html \ - lspmap.png \ - oddlsp.png \ - oggstream.html \ - programming.html \ - squarepolar.png \ - stereo.html \ - stream.png \ - v-comment.html \ - vorbis-clip.txt \ - vorbis-errors.txt \ - vorbis-fidelity.html \ - vorbis.html \ - vorbisword2.png \ - 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    - - - - - - - -

    Vorbis I specification

    -
    Xiph.org Foundation
    -
    -
    February 3, 2010
    -
    -

    Contents

    -
    - 1 Introduction and Description -
      1.1 Overview -
       1.1.1 Application -
       1.1.2 Classification -
       1.1.3 Assumptions -
       1.1.4 Codec Setup and Probability Model -
       1.1.5 Format Specification -
       1.1.6 Hardware Profile -
      1.2 Decoder Configuration -
       1.2.1 Global Config -
       1.2.2 Mode - - - -
       1.2.3 Mapping -
       1.2.4 Floor -
       1.2.5 Residue -
       1.2.6 Codebooks -
      1.3 High-level Decode Process -
       1.3.1 Decode Setup -
       1.3.2 Decode Procedure -
     2 Bitpacking Convention -
      2.1 Overview -
       2.1.1 octets, bytes and words -
       2.1.2 bit order -
       2.1.3 byte order -
       2.1.4 coding bits into byte sequences -
       2.1.5 signedness -
       2.1.6 coding example -
       2.1.7 decoding example -
       2.1.8 end-of-packet alignment -
       2.1.9 reading zero bits -
     3 Probability Model and Codebooks -
      3.1 Overview -
       3.1.1 Bitwise operation -
      3.2 Packed codebook format -
       3.2.1 codebook decode -
      3.3 Use of the codebook abstraction -
     4 Codec Setup and Packet Decode -
      4.1 Overview -
      4.2 Header decode and decode setup -
       4.2.1 Common header decode -
       4.2.2 Identification header - - - -
       4.2.3 Comment header -
       4.2.4 Setup header -
      4.3 Audio packet decode and synthesis -
       4.3.1 packet type, mode and window decode -
       4.3.2 floor curve decode -
       4.3.3 nonzero vector propagate -
       4.3.4 residue decode -
       4.3.5 inverse coupling -
       4.3.6 dot product -
       4.3.7 inverse MDCT -
       4.3.8 overlap˙add -
       4.3.9 output channel order -
     5 comment field and header specification -
      5.1 Overview -
      5.2 Comment encoding -
       5.2.1 Structure -
       5.2.2 Content vector format -
       5.2.3 Encoding -
     6 Floor type 0 setup and decode -
      6.1 Overview -
      6.2 Floor 0 format -
       6.2.1 header decode -
       6.2.2 packet decode -
       6.2.3 curve computation -
     7 Floor type 1 setup and decode -
      7.1 Overview -
      7.2 Floor 1 format -
       7.2.1 model -
       7.2.2 header decode - - - -
     8 Residue setup and decode -
      8.1 Overview -
      8.2 Residue format -
      8.3 residue 0 -
      8.4 residue 1 -
      8.5 residue 2 -
      8.6 Residue decode -
       8.6.1 header decode -
       8.6.2 packet decode -
       8.6.3 format 0 specifics -
       8.6.4 format 1 specifics -
       8.6.5 format 2 specifics -
     9 Helper equations -
      9.1 Overview -
      9.2 Functions -
       9.2.1 ilog -
       9.2.2 float32˙unpack -
       9.2.3 lookup1˙values -
       9.2.4 low˙neighbor -
       9.2.5 high˙neighbor -
       9.2.6 render˙point -
       9.2.7 render˙line -
     10 Tables -
      10.1 floor1_inverse_dB_table -
     A Embedding Vorbis into an Ogg stream -
      A.1 Overview -
       A.1.1 Restrictions -
       A.1.2 MIME type -
      A.2 Encapsulation - - - -
     B Vorbis encapsulation in RTP -
    - - - -

    1 Introduction and Description

    -

    -

    1.1 Overview

    -

    This document provides a high level description of the Vorbis codec’s construction. A bit-by-bit -specification appears beginning in Section 4, “Codec Setup and Packet Decode”. The later -sections assume a high-level understanding of the Vorbis decode process, which is provided -here. -

    -

    1.1.1 Application
    -

    Vorbis is a general purpose perceptual audio CODEC intended to allow maximum encoder -flexibility, thus allowing it to scale competitively over an exceptionally wide range of bitrates. At -the high quality/bitrate end of the scale (CD or DAT rate stereo, 16/24 bits) it is in the same -league as MPEG-2 and MPC. Similarly, the 1.0 encoder can encode high-quality CD and DAT -rate stereo at below 48kbps without resampling to a lower rate. Vorbis is also intended for lower -and higher sample rates (from 8kHz telephony to 192kHz digital masters) and a range of channel -representations (monaural, polyphonic, stereo, quadraphonic, 5.1, ambisonic, or up to 255 -discrete channels). -

    -

    1.1.2 Classification
    -

    Vorbis I is a forward-adaptive monolithic transform CODEC based on the Modified Discrete -Cosine Transform. The codec is structured to allow addition of a hybrid wavelet filterbank in -Vorbis II to offer better transient response and reproduction using a transform better suited to -localized time events. - - - -

    -

    1.1.3 Assumptions
    -

    The Vorbis CODEC design assumes a complex, psychoacoustically-aware encoder and simple, -low-complexity decoder. Vorbis decode is computationally simpler than mp3, although it does -require more working memory as Vorbis has no static probability model; the vector codebooks -used in the first stage of decoding from the bitstream are packed in their entirety into the Vorbis -bitstream headers. In packed form, these codebooks occupy only a few kilobytes; the extent to -which they are pre-decoded into a cache is the dominant factor in decoder memory -usage. -

    Vorbis provides none of its own framing, synchronization or protection against errors; it -is solely a method of accepting input audio, dividing it into individual frames and -compressing these frames into raw, unformatted ’packets’. The decoder then accepts -these raw packets in sequence, decodes them, synthesizes audio frames from them, and -reassembles the frames into a facsimile of the original audio stream. Vorbis is a free-form -variable bit rate (VBR) codec and packets have no minimum size, maximum size, or -fixed/expected size. Packets are designed that they may be truncated (or padded) -and remain decodable; this is not to be considered an error condition and is used -extensively in bitrate management in peeling. Both the transport mechanism and -decoder must allow that a packet may be any size, or end before or after packet decode -expects. -

    Vorbis packets are thus intended to be used with a transport mechanism that provides free-form -framing, sync, positioning and error correction in accordance with these design assumptions, such -as Ogg (for file transport) or RTP (for network multicast). For purposes of a few examples in this -document, we will assume that Vorbis is to be embedded in an Ogg stream specifically, -although this is by no means a requirement or fundamental assumption in the Vorbis -design. -

    The specification for embedding Vorbis into an Ogg transport stream is in Section A, -“Embedding Vorbis into an Ogg stream”. -

    -

    1.1.4 Codec Setup and Probability Model
    -

    Vorbis’ heritage is as a research CODEC and its current design reflects a desire to allow multiple -decades of continuous encoder improvement before running out of room within the codec -specification. For these reasons, configurable aspects of codec setup intentionally lean toward the -extreme of forward adaptive. - - - -

    The single most controversial design decision in Vorbis (and the most unusual for a Vorbis -developer to keep in mind) is that the entire probability model of the codec, the Huffman and -VQ codebooks, is packed into the bitstream header along with extensive CODEC setup -parameters (often several hundred fields). This makes it impossible, as it would be with -MPEG audio layers, to embed a simple frame type flag in each audio packet, or begin -decode at any frame in the stream without having previously fetched the codec setup -header. -

    Note: Vorbis can initiate decode at any arbitrary packet within a bitstream so long as the codec -has been initialized/setup with the setup headers. -

    Thus, Vorbis headers are both required for decode to begin and relatively large as bitstream -headers go. The header size is unbounded, although for streaming a rule-of-thumb of 4kB or less -is recommended (and Xiph.Org’s Vorbis encoder follows this suggestion). -

    Our own design work indicates the primary liability of the required header is in mindshare; it is -an unusual design and thus causes some amount of complaint among engineers as this runs -against current design trends (and also points out limitations in some existing software/interface -designs, such as Windows’ ACM codec framework). However, we find that it does not -fundamentally limit Vorbis’ suitable application space. -

    -

    1.1.5 Format Specification
    -

    The Vorbis format is well-defined by its decode specification; any encoder that produces packets -that are correctly decoded by the reference Vorbis decoder described below may be considered -a proper Vorbis encoder. A decoder must faithfully and completely implement the -specification defined below (except where noted) to be considered a proper Vorbis -decoder. -

    -

    1.1.6 Hardware Profile
    - - - -

    Although Vorbis decode is computationally simple, it may still run into specific limitations of an -embedded design. For this reason, embedded designs are allowed to deviate in limited ways from -the ‘full’ decode specification yet still be certified compliant. These optional omissions are -labelled in the spec where relevant. -

    -

    1.2 Decoder Configuration

    -

    Decoder setup consists of configuration of multiple, self-contained component abstractions that -perform specific functions in the decode pipeline. Each different component instance of a specific -type is semantically interchangeable; decoder configuration consists both of internal component -configuration, as well as arrangement of specific instances into a decode pipeline. Componentry -arrangement is roughly as follows: -

    -

    - -

    PIC -

    Figure 1: decoder pipeline configuration
    -
    -

    -

    1.2.1 Global Config
    -

    Global codec configuration consists of a few audio related fields (sample rate, channels), Vorbis -version (always ’0’ in Vorbis I), bitrate hints, and the lists of component instances. All other -configuration is in the context of specific components. -

    -

    1.2.2 Mode
    - - - -

    Each Vorbis frame is coded according to a master ’mode’. A bitstream may use one or many -modes. -

    The mode mechanism is used to encode a frame according to one of multiple possible -methods with the intention of choosing a method best suited to that frame. Different -modes are, e.g. how frame size is changed from frame to frame. The mode number of a -frame serves as a top level configuration switch for all other specific aspects of frame -decode. -

    A ’mode’ configuration consists of a frame size setting, window type (always 0, the Vorbis -window, in Vorbis I), transform type (always type 0, the MDCT, in Vorbis I) and a mapping -number. The mapping number specifies which mapping configuration instance to use for low-level -packet decode and synthesis. -

    -

    1.2.3 Mapping
    -

    A mapping contains a channel coupling description and a list of ’submaps’ that bundle sets -of channel vectors together for grouped encoding and decoding. These submaps are -not references to external components; the submap list is internal and specific to a -mapping. -

    A ’submap’ is a configuration/grouping that applies to a subset of floor and residue vectors -within a mapping. The submap functions as a last layer of indirection such that specific special -floor or residue settings can be applied not only to all the vectors in a given mode, but also -specific vectors in a specific mode. Each submap specifies the proper floor and residue -instance number to use for decoding that submap’s spectral floor and spectral residue -vectors. -

    As an example: -

    Assume a Vorbis stream that contains six channels in the standard 5.1 format. The sixth -channel, as is normal in 5.1, is bass only. Therefore it would be wasteful to encode a -full-spectrum version of it as with the other channels. The submapping mechanism can be used -to apply a full range floor and residue encoding to channels 0 through 4, and a bass-only -representation to the bass channel, thus saving space. In this example, channels 0-4 belong to -submap 0 (which indicates use of a full-range floor) and channel 5 belongs to submap 1, which -uses a bass-only representation. - - - -

    -

    1.2.4 Floor
    -

    Vorbis encodes a spectral ’floor’ vector for each PCM channel. This vector is a low-resolution -representation of the audio spectrum for the given channel in the current frame, generally used -akin to a whitening filter. It is named a ’floor’ because the Xiph.Org reference encoder has -historically used it as a unit-baseline for spectral resolution. -

    A floor encoding may be of two types. Floor 0 uses a packed LSP representation on a dB -amplitude scale and Bark frequency scale. Floor 1 represents the curve as a piecewise linear -interpolated representation on a dB amplitude scale and linear frequency scale. The two floors -are semantically interchangeable in encoding/decoding. However, floor type 1 provides more -stable inter-frame behavior, and so is the preferred choice in all coupled-stereo and -high bitrate modes. Floor 1 is also considerably less expensive to decode than floor -0. -

    Floor 0 is not to be considered deprecated, but it is of limited modern use. No known Vorbis -encoder past Xiph.org’s own beta 4 makes use of floor 0. -

    The values coded/decoded by a floor are both compactly formatted and make use of entropy -coding to save space. For this reason, a floor configuration generally refers to multiple -codebooks in the codebook component list. Entropy coding is thus provided as an -abstraction, and each floor instance may choose from any and all available codebooks when -coding/decoding. -

    -

    1.2.5 Residue
    -

    The spectral residue is the fine structure of the audio spectrum once the floor curve has been -subtracted out. In simplest terms, it is coded in the bitstream using cascaded (multi-pass) vector -quantization according to one of three specific packing/coding algorithms numbered -0 through 2. The packing algorithm details are configured by residue instance. As -with the floor components, the final VQ/entropy encoding is provided by external -codebook instances and each residue instance may choose from any and all available -codebooks. -

    - - - -

    1.2.6 Codebooks
    -

    Codebooks are a self-contained abstraction that perform entropy decoding and, optionally, use -the entropy-decoded integer value as an offset into an index of output value vectors, returning -the indicated vector of values. -

    The entropy coding in a Vorbis I codebook is provided by a standard Huffman binary tree -representation. This tree is tightly packed using one of several methods, depending on whether -codeword lengths are ordered or unordered, or the tree is sparse. -

    The codebook vector index is similarly packed according to index characteristic. Most commonly, -the vector index is encoded as a single list of values of possible values that are then permuted -into a list of n-dimensional rows (lattice VQ). -

    -

    1.3 High-level Decode Process

    -

    -

    1.3.1 Decode Setup
    -

    Before decoding can begin, a decoder must initialize using the bitstream headers matching the -stream to be decoded. Vorbis uses three header packets; all are required, in-order, by -this specification. Once set up, decode may begin at any audio packet belonging to -the Vorbis stream. In Vorbis I, all packets after the three initial headers are audio -packets. -

    The header packets are, in order, the identification header, the comments header, and the setup -header. -

    Identification Header -The identification header identifies the bitstream as Vorbis, Vorbis version, and the simple audio -characteristics of the stream such as sample rate and number of channels. - - - -

    Comment Header -The comment header includes user text comments (“tags”) and a vendor string for the -application/library that produced the bitstream. The encoding and proper use of the comment -header is described in Section 5, “comment field and header specification”. -

    Setup Header -The setup header includes extensive CODEC setup information as well as the complete VQ and -Huffman codebooks needed for decode. -

    -

    1.3.2 Decode Procedure
    -

    The decoding and synthesis procedure for all audio packets is fundamentally the same. -

      -
    1. decode packet type flag -
      2. -
    2. decode mode number -
      3. -
    3. decode window shape (long windows only) -
      4. -
    4. decode floor -
      5. -
    5. decode residue into residue vectors -
      6. -
    6. inverse channel coupling of residue vectors -
      7. -
    7. generate floor curve from decoded floor data -
      8. -
    8. compute dot product of floor and residue, producing audio spectrum vector -
      9. -
    9. inverse monolithic transform of audio spectrum vector, always an MDCT in Vorbis - I - - - -
      10. -
    10. overlap/add left-hand output of transform with right-hand output of previous frame -
      11. -
    11. store right hand-data from transform of current frame for future lapping -
      12. -
    12. if not first frame, return results of overlap/add as audio result of current frame
    -

    Note that clever rearrangement of the synthesis arithmetic is possible; as an example, one can -take advantage of symmetries in the MDCT to store the right-hand transform data of a partial -MDCT for a 50% inter-frame buffer space savings, and then complete the transform later before -overlap/add with the next frame. This optimization produces entirely equivalent output and is -naturally perfectly legal. The decoder must be entirely mathematically equivalent to the -specification, it need not be a literal semantic implementation. -

    Packet type decode -Vorbis I uses four packet types. The first three packet types mark each of the three Vorbis -headers described above. The fourth packet type marks an audio packet. All other packet types -are reserved; packets marked with a reserved type should be ignored. -

    Following the three header packets, all packets in a Vorbis I stream are audio. The first step of -audio packet decode is to read and verify the packet type; a non-audio packet when audio is -expected indicates stream corruption or a non-compliant stream. The decoder must ignore the -packet and not attempt decoding it to audio. -

    Mode decode -Vorbis allows an encoder to set up multiple, numbered packet ’modes’, as described earlier, all of -which may be used in a given Vorbis stream. The mode is encoded as an integer used as a direct -offset into the mode instance index. -

    Window shape decode (long windows only) -Vorbis frames may be one of two PCM sample sizes specified during codec setup. In Vorbis I, -legal frame sizes are powers of two from 64 to 8192 samples. Aside from coupling, Vorbis -handles channels as independent vectors and these frame sizes are in samples per -channel. - - - -

    Vorbis uses an overlapping transform, namely the MDCT, to blend one frame into the next, -avoiding most inter-frame block boundary artifacts. The MDCT output of one frame is windowed -according to MDCT requirements, overlapped 50% with the output of the previous frame and -added. The window shape assures seamless reconstruction. -

    This is easy to visualize in the case of equal sized-windows: -

    -

    - -

    PIC -

    Figure 2: overlap of two equal-sized windows
    -
    -

    And slightly more complex in the case of overlapping unequal sized windows: -

    -

    - -

    PIC -

    Figure 3: overlap of a long and a short window
    -
    -

    In the unequal-sized window case, the window shape of the long window must be modified for -seamless lapping as above. It is possible to correctly infer window shape to be applied to the -current window from knowing the sizes of the current, previous and next window. It is legal for a -decoder to use this method. However, in the case of a long window (short windows require no -modification), Vorbis also codes two flag bits to specify pre- and post- window shape. Although -not strictly necessary for function, this minor redundancy allows a packet to be fully decoded to -the point of lapping entirely independently of any other packet, allowing easier abstraction of -decode layers as well as allowing a greater level of easy parallelism in encode and -decode. -

    A description of valid window functions for use with an inverse MDCT can be found in [1]. -Vorbis windows all use the slope function -

    -y = sin (.5 ∗ π sin2((x + .5)∕n ∗ π)). - - - -
    -

    -

    floor decode -Each floor is encoded/decoded in channel order, however each floor belongs to a ’submap’ that -specifies which floor configuration to use. All floors are decoded before residue decode -begins. -

    residue decode -Although the number of residue vectors equals the number of channels, channel coupling may -mean that the raw residue vectors extracted during decode do not map directly to specific -channels. When channel coupling is in use, some vectors will correspond to coupled magnitude or -angle. The coupling relationships are described in the codec setup and may differ from frame to -frame, due to different mode numbers. -

    Vorbis codes residue vectors in groups by submap; the coding is done in submap order from -submap 0 through n-1. This differs from floors which are coded using a configuration provided by -submap number, but are coded individually in channel order. -

    inverse channel coupling -A detailed discussion of stereo in the Vorbis codec can be found in the document -Stereo Channel Coupling in the Vorbis CODEC. Vorbis is not limited to only stereo -coupling, but the stereo document also gives a good overview of the generic coupling -mechanism. -

    Vorbis coupling applies to pairs of residue vectors at a time; decoupling is done in-place a -pair at a time in the order and using the vectors specified in the current mapping -configuration. The decoupling operation is the same for all pairs, converting square polar -representation (where one vector is magnitude and the second angle) back to Cartesian -representation. -

    After decoupling, in order, each pair of vectors on the coupling list, the resulting residue vectors -represent the fine spectral detail of each output channel. - - - -

    generate floor curve -The decoder may choose to generate the floor curve at any appropriate time. It is reasonable to -generate the output curve when the floor data is decoded from the raw packet, or it -can be generated after inverse coupling and applied to the spectral residue directly, -combining generation and the dot product into one step and eliminating some working -space. -

    Both floor 0 and floor 1 generate a linear-range, linear-domain output vector to be multiplied -(dot product) by the linear-range, linear-domain spectral residue. -

    compute floor/residue dot product -This step is straightforward; for each output channel, the decoder multiplies the floor curve and -residue vectors element by element, producing the finished audio spectrum of each -channel. -

    One point is worth mentioning about this dot product; a common mistake in a fixed point -implementation might be to assume that a 32 bit fixed-point representation for floor and -residue and direct multiplication of the vectors is sufficient for acceptable spectral depth -in all cases because it happens to mostly work with the current Xiph.Org reference -encoder. -

    However, floor vector values can span ∼140dB (∼24 bits unsigned), and the audio spectrum -vector should represent a minimum of 120dB (∼21 bits with sign), even when output is to a 16 -bit PCM device. For the residue vector to represent full scale if the floor is nailed -to −140dB, it must be able to span 0 to +140dB. For the residue vector to reach -full scale if the floor is nailed at 0dB, it must be able to represent −140dB to +0dB. -Thus, in order to handle full range dynamics, a residue vector may span −140dB to -+140dB entirely within spec. A 280dB range is approximately 48 bits with sign; thus the -residue vector must be able to represent a 48 bit range and the dot product must -be able to handle an effective 48 bit times 24 bit multiplication. This range may be -achieved using large (64 bit or larger) integers, or implementing a movable binary point -representation. -

    inverse monolithic transform (MDCT) -The audio spectrum is converted back into time domain PCM audio via an inverse Modified -Discrete Cosine Transform (MDCT). A detailed description of the MDCT is available in -[1]. -

    Note that the PCM produced directly from the MDCT is not yet finished audio; it must be - - - -lapped with surrounding frames using an appropriate window (such as the Vorbis window) before -the MDCT can be considered orthogonal. -

    overlap/add data -Windowed MDCT output is overlapped and added with the right hand data of the previous -window such that the 3/4 point of the previous window is aligned with the 1/4 point of the -current window (as illustrated in the window overlap diagram). At this point, the audio data -between the center of the previous frame and the center of the current frame is now finished and -ready to be returned. -

    cache right hand data -The decoder must cache the right hand portion of the current frame to be lapped with the left -hand portion of the next frame. -

    return finished audio data -The overlapped portion produced from overlapping the previous and current frame data -is finished data to be returned by the decoder. This data spans from the center of -the previous window to the center of the current window. In the case of same-sized -windows, the amount of data to return is one-half block consisting of and only of the -overlapped portions. When overlapping a short and long window, much of the returned -range is not actually overlap. This does not damage transform orthogonality. Pay -attention however to returning the correct data range; the amount of data to be returned -is: -

    -

    -1  window_blocksize(previous_window)/4+window_blocksize(current_window)/4 -
    -

    from the center of the previous window to the center of the current window. -

    Data is not returned from the first frame; it must be used to ’prime’ the decode engine. The -encoder accounts for this priming when calculating PCM offsets; after the first frame, the proper -PCM output offset is ’0’ (as no data has been returned yet). - - - - - - -

    2 Bitpacking Convention

    -

    -

    2.1 Overview

    -

    The Vorbis codec uses relatively unstructured raw packets containing arbitrary-width binary -integer fields. Logically, these packets are a bitstream in which bits are coded one-by-one by the -encoder and then read one-by-one in the same monotonically increasing order by the decoder. -Most current binary storage arrangements group bits into a native word size of eight bits -(octets), sixteen bits, thirty-two bits or, less commonly other fixed word sizes. The Vorbis -bitpacking convention specifies the correct mapping of the logical packet bitstream into an actual -representation in fixed-width words. -

    -

    2.1.1 octets, bytes and words
    -

    In most contemporary architectures, a ’byte’ is synonymous with an ’octet’, that is, eight bits. -This has not always been the case; seven, ten, eleven and sixteen bit ’bytes’ have been used. -For purposes of the bitpacking convention, a byte implies the native, smallest integer -storage representation offered by a platform. On modern platforms, this is generally -assumed to be eight bits (not necessarily because of the processor but because of the -filesystem/memory architecture. Modern filesystems invariably offer bytes as the fundamental -atom of storage). A ’word’ is an integer size that is a grouped multiple of this smallest -size. -

    The most ubiquitous architectures today consider a ’byte’ to be an octet (eight bits) and a word -to be a group of two, four or eight bytes (16, 32 or 64 bits). Note however that the Vorbis -bitpacking convention is still well defined for any native byte size; Vorbis uses the native -bit-width of a given storage system. This document assumes that a byte is one octet for purposes -of example. -

    - - - -

    2.1.2 bit order
    -

    A byte has a well-defined ’least significant’ bit (LSb), which is the only bit set when the byte is -storing the two’s complement integer value +1. A byte’s ’most significant’ bit (MSb) is at the -opposite end of the byte. Bits in a byte are numbered from zero at the LSb to n (n = 7 in an -octet) for the MSb. -

    -

    2.1.3 byte order
    -

    Words are native groupings of multiple bytes. Several byte orderings are possible in a word; the -common ones are 3-2-1-0 (’big endian’ or ’most significant byte first’ in which the -highest-valued byte comes first), 0-1-2-3 (’little endian’ or ’least significant byte first’ in -which the lowest value byte comes first) and less commonly 3-1-2-0 and 0-2-1-3 (’mixed -endian’). -

    The Vorbis bitpacking convention specifies storage and bitstream manipulation at the byte, not -word, level, thus host word ordering is of a concern only during optimization when writing high -performance code that operates on a word of storage at a time rather than by byte. -Logically, bytes are always coded and decoded in order from byte zero through byte -n. -

    -

    2.1.4 coding bits into byte sequences
    -

    The Vorbis codec has need to code arbitrary bit-width integers, from zero to 32 bits -wide, into packets. These integer fields are not aligned to the boundaries of the byte -representation; the next field is written at the bit position at which the previous field -ends. -

    The encoder logically packs integers by writing the LSb of a binary integer to the logical -bitstream first, followed by next least significant bit, etc, until the requested number of bits -have been coded. When packing the bits into bytes, the encoder begins by placing -the LSb of the integer to be written into the least significant unused bit position of -the destination byte, followed by the next-least significant bit of the source integer -and so on up to the requested number of bits. When all bits of the destination byte -have been filled, encoding continues by zeroing all bits of the next byte and writing -the next bit into the bit position 0 of that byte. Decoding follows the same process - - - -as encoding, but by reading bits from the byte stream and reassembling them into -integers. -

    -

    2.1.5 signedness
    -

    The signedness of a specific number resulting from decode is to be interpreted by the decoder -given decode context. That is, the three bit binary pattern ’b111’ can be taken to represent -either ’seven’ as an unsigned integer, or ’-1’ as a signed, two’s complement integer. The -encoder and decoder are responsible for knowing if fields are to be treated as signed or -unsigned. -

    -

    2.1.6 coding example
    -

    Code the 4 bit integer value ’12’ [b1100] into an empty bytestream. Bytestream result: -

    -

    -1                | -
    2                V -
    3   -
    4          7 6 5 4 3 2 1 0 -
    5  byte 0 [0 0 0 0 1 1 0 0]  <- -
    6  byte 1 [               ] -
    7  byte 2 [               ] -
    8  byte 3 [               ] -
    9               ... -
    10  byte n [               ]  bytestream length == 1 byte -
    11   -
    -

    Continue by coding the 3 bit integer value ’-1’ [b111]: -

    -

    -1          | -
    2          V -
    3   -
    4          7 6 5 4 3 2 1 0 -
    5  byte 0 [0 1 1 1 1 1 0 0]  <- -
    6  byte 1 [               ] - - - -
    7  byte 2 [               ] -
    8  byte 3 [               ] -
    9               ... -
    10  byte n [               ]  bytestream length == 1 byte -
    -

    Continue by coding the 7 bit integer value ’17’ [b0010001]: -

    -

    -1            | -
    2            V -
    3   -
    4          7 6 5 4 3 2 1 0 -
    5  byte 0 [1 1 1 1 1 1 0 0] -
    6  byte 1 [0 0 0 0 1 0 0 0]  <- -
    7  byte 2 [               ] -
    8  byte 3 [               ] -
    9               ... -
    10  byte n [               ]  bytestream length == 2 bytes -
    11                            bit cursor == 6 -
    -

    Continue by coding the 13 bit integer value ’6969’ [b110 11001110 01]: -

    -

    -1                  | -
    2                  V -
    3   -
    4          7 6 5 4 3 2 1 0 -
    5  byte 0 [1 1 1 1 1 1 0 0] -
    6  byte 1 [0 1 0 0 1 0 0 0] -
    7  byte 2 [1 1 0 0 1 1 1 0] -
    8  byte 3 [0 0 0 0 0 1 1 0]  <- -
    9               ... -
    10  byte n [               ]  bytestream length == 4 bytes -
    11   -
    -

    -

    2.1.7 decoding example
    -

    Reading from the beginning of the bytestream encoded in the above example: -

    -

    - - - -1                        | -
    2                        V -
    3   -
    4          7 6 5 4 3 2 1 0 -
    5  byte 0 [1 1 1 1 1 1 0 0]  <- -
    6  byte 1 [0 1 0 0 1 0 0 0] -
    7  byte 2 [1 1 0 0 1 1 1 0] -
    8  byte 3 [0 0 0 0 0 1 1 0]  bytestream length == 4 bytes -
    9   -
    -

    We read two, two-bit integer fields, resulting in the returned numbers ’b00’ and ’b11’. Two things -are worth noting here: -

      -
    • Although these four bits were originally written as a single four-bit integer, reading - some other combination of bit-widths from the bitstream is well defined. There are - no artificial alignment boundaries maintained in the bitstream. -
      • -
    • The second value is the two-bit-wide integer ’b11’. This value may be interpreted - either as the unsigned value ’3’, or the signed value ’-1’. Signedness is dependent on - decode context.
    -

    -

    2.1.8 end-of-packet alignment
    -

    The typical use of bitpacking is to produce many independent byte-aligned packets which are -embedded into a larger byte-aligned container structure, such as an Ogg transport bitstream. -Externally, each bytestream (encoded bitstream) must begin and end on a byte boundary. Often, -the encoded bitstream is not an integer number of bytes, and so there is unused (uncoded) space -in the last byte of a packet. -

    Unused space in the last byte of a bytestream is always zeroed during the coding process. Thus, -should this unused space be read, it will return binary zeroes. -

    Attempting to read past the end of an encoded packet results in an ’end-of-packet’ condition. -End-of-packet is not to be considered an error; it is merely a state indicating that there is -insufficient remaining data to fulfill the desired read size. Vorbis uses truncated packets as a -normal mode of operation, and as such, decoders must handle reading past the end of a packet as -a typical mode of operation. Any further read operations after an ’end-of-packet’ condition shall -also return ’end-of-packet’. - - - -

    -

    2.1.9 reading zero bits
    -

    Reading a zero-bit-wide integer returns the value ’0’ and does not increment the stream cursor. -Reading to the end of the packet (but not past, such that an ’end-of-packet’ condition has not -triggered) and then reading a zero bit integer shall succeed, returning 0, and not trigger an -end-of-packet condition. Reading a zero-bit-wide integer after a previous read sets ’end-of-packet’ -shall also fail with ’end-of-packet’. - - - - - - -

    3 Probability Model and Codebooks

    -

    -

    3.1 Overview

    -

    Unlike practically every other mainstream audio codec, Vorbis has no statically configured -probability model, instead packing all entropy decoding configuration, VQ and Huffman, into the -bitstream itself in the third header, the codec setup header. This packed configuration consists of -multiple ’codebooks’, each containing a specific Huffman-equivalent representation for decoding -compressed codewords as well as an optional lookup table of output vector values to which a -decoded Huffman value is applied as an offset, generating the final decoded output corresponding -to a given compressed codeword. -

    -

    3.1.1 Bitwise operation
    -

    The codebook mechanism is built on top of the vorbis bitpacker. Both the codebooks themselves -and the codewords they decode are unrolled from a packet as a series of arbitrary-width values -read from the stream according to Section 2, “Bitpacking Convention”. -

    -

    3.2 Packed codebook format

    -

    For purposes of the examples below, we assume that the storage system’s native byte width is -eight bits. This is not universally true; see Section 2, “Bitpacking Convention” for discussion -relating to non-eight-bit bytes. - - - -

    -

    3.2.1 codebook decode
    -

    A codebook begins with a 24 bit sync pattern, 0x564342: -

    -

    -1  byte 0: [ 0 1 0 0 0 0 1 0 ] (0x42) -
    2  byte 1: [ 0 1 0 0 0 0 1 1 ] (0x43) -
    3  byte 2: [ 0 1 0 1 0 1 1 0 ] (0x56) -
    -

    16 bit [codebook_dimensions] and 24 bit [codebook_entries] fields: -

    -

    -1   -
    2  byte 3: [ X X X X X X X X ] -
    3  byte 4: [ X X X X X X X X ] [codebook_dimensions] (16 bit unsigned) -
    4   -
    5  byte 5: [ X X X X X X X X ] -
    6  byte 6: [ X X X X X X X X ] -
    7  byte 7: [ X X X X X X X X ] [codebook_entries] (24 bit unsigned) -
    8   -
    -

    Next is the [ordered] bit flag: -

    -

    -1   -
    2  byte 8: [               X ] [ordered] (1 bit) -
    3   -
    -

    Each entry, numbering a total of [codebook_entries], is assigned a codeword length. -We now read the list of codeword lengths and store these lengths in the array -[codebook_codeword_lengths]. Decode of lengths is according to whether the [ordered] flag -is set or unset. -

      -
    • If the [ordered] flag is unset, the codeword list is not length ordered and the decoder - needs to read each codeword length one-by-one. -

      The decoder first reads one additional bit flag, the [sparse] flag. This flag determines - whether or not the codebook contains unused entries that are not to be included in - - - - the codeword decode tree: -

      -

      -1  byte 8: [             X 1 ] [sparse] flag (1 bit) -
      -

      The decoder now performs for each of the [codebook_entries] codebook entries: -

      -

      -1   -
      2    1) if([sparse] is set) { -
      3   -
      4           2) [flag] = read one bit; -
      5           3) if([flag] is set) { -
      6   -
      7                4) [length] = read a five bit unsigned integer; -
      8                5) codeword length for this entry is [length]+1; -
      9   -
      10              } else { -
      11   -
      12                6) this entry is unused.  mark it as such. -
      13   -
      14              } -
      15   -
      16       } else the sparse flag is not set { -
      17   -
      18          7) [length] = read a five bit unsigned integer; -
      19          8) the codeword length for this entry is [length]+1; -
      20   -
      21       } -
      22   -
      -
      • -
    • If the [ordered] flag is set, the codeword list for this codebook is encoded in - ascending length order. Rather than reading a length for every codeword, the - encoder reads the number of codewords per length. That is, beginning at entry - zero: -

      -

      -1    1) [current_entry] = 0; -
      2    2) [current_length] = read a five bit unsigned integer and add 1; -
      3    3) [number] = read ilog([codebook_entries] - [current_entry]) bits as an unsigned integer -
      4    4) set the entries [current_entry] through [current_entry]+[number]-1, inclusive, -
      5      of the [codebook_codeword_lengths] array to [current_length] -
      6    5) set [current_entry] to [number] + [current_entry] -
      7    6) increment [current_length] by 1 -
      8    7) if [current_entry] is greater than [codebook_entries] ERROR CONDITION; -
      9      the decoder will not be able to read this stream. -
      10    8) if [current_entry] is less than [codebook_entries], repeat process starting at 3) -
      11    9) done. - - - -
      -
    -

    After all codeword lengths have been decoded, the decoder reads the vector lookup table. Vorbis -I supports three lookup types: -

      -
    1. No lookup -
      2. -
    2. Implicitly populated value mapping (lattice VQ) -
      3. -
    3. Explicitly populated value mapping (tessellated or ’foam’ VQ)
    -

    The lookup table type is read as a four bit unsigned integer: -

    -1    1) [codebook_lookup_type] = read four bits as an unsigned integer -
    -

    Codebook decode precedes according to [codebook_lookup_type]: -

      -
    • Lookup type zero indicates no lookup to be read. Proceed past lookup decode. -
      • -
    • Lookup types one and two are similar, differing only in the number of lookup values to - be read. Lookup type one reads a list of values that are permuted in a set pattern to - build a list of vectors, each vector of order [codebook_dimensions] scalars. Lookup - type two builds the same vector list, but reads each scalar for each vector explicitly, - rather than building vectors from a smaller list of possible scalar values. Lookup - decode proceeds as follows: -

      -

      -1    1) [codebook_minimum_value] = float32_unpack( read 32 bits as an unsigned integer) -
      2    2) [codebook_delta_value] = float32_unpack( read 32 bits as an unsigned integer) -
      3    3) [codebook_value_bits] = read 4 bits as an unsigned integer and add 1 -
      4    4) [codebook_sequence_p] = read 1 bit as a boolean flag -
      5   -
      6    if ( [codebook_lookup_type] is 1 ) { -
      7   -
      8       5) [codebook_lookup_values] = lookup1_values([codebook_entries], [codebook_dimensions] ) -
      9   -
      10    } else { -
      11   -
      12       6) [codebook_lookup_values] = [codebook_entries] * [codebook_dimensions] -
      13   -
      14    } -
      15   -
      16    7) read a total of [codebook_lookup_values] unsigned integers of [codebook_value_bits] each; - - - -
      17       store these in order in the array [codebook_multiplicands] -
      -
      • -
    • A [codebook_lookup_type] of greater than two is reserved and indicates a stream that is - not decodable by the specification in this document. -
    -

    An ’end of packet’ during any read operation in the above steps is considered an error condition -rendering the stream undecodable. -

    Huffman decision tree representation -The [codebook_codeword_lengths] array and [codebook_entries] value uniquely define the -Huffman decision tree used for entropy decoding. -

    Briefly, each used codebook entry (recall that length-unordered codebooks support unused -codeword entries) is assigned, in order, the lowest valued unused binary Huffman codeword -possible. Assume the following codeword length list: -

    -

    -1  entry 0: length 2 -
    2  entry 1: length 4 -
    3  entry 2: length 4 -
    4  entry 3: length 4 -
    5  entry 4: length 4 -
    6  entry 5: length 2 -
    7  entry 6: length 3 -
    8  entry 7: length 3 -
    -

    Assigning codewords in order (lowest possible value of the appropriate length to highest) results -in the following codeword list: -

    -

    -1  entry 0: length 2 codeword 00 -
    2  entry 1: length 4 codeword 0100 -
    3  entry 2: length 4 codeword 0101 -
    4  entry 3: length 4 codeword 0110 -
    5  entry 4: length 4 codeword 0111 -
    6  entry 5: length 2 codeword 10 -
    7  entry 6: length 3 codeword 110 -
    8  entry 7: length 3 codeword 111 -
    - - - -

    Note: Unlike most binary numerical values in this document, we intend the above codewords to -be read and used bit by bit from left to right, thus the codeword ’001’ is the bit string ’zero, zero, -one’. When determining ’lowest possible value’ in the assignment definition above, the leftmost -bit is the MSb. -

    It is clear that the codeword length list represents a Huffman decision tree with the entry -numbers equivalent to the leaves numbered left-to-right: -

    -

    - -

    PIC -

    Figure 4: huffman tree illustration
    -
    -

    As we assign codewords in order, we see that each choice constructs a new leaf in the leftmost -possible position. -

    Note that it’s possible to underspecify or overspecify a Huffman tree via the length list. -In the above example, if codeword seven were eliminated, it’s clear that the tree is -unfinished: -

    -

    - -

    PIC -

    Figure 5: underspecified huffman tree illustration
    -
    -

    Similarly, in the original codebook, it’s clear that the tree is fully populated and a ninth -codeword is impossible. Both underspecified and overspecified trees are an error condition -rendering the stream undecodable. Take special care that a codebook with a single used -entry is handled properly; it consists of a single codework of zero bits and ’reading’ -a value out of such a codebook always returns the single used value and sinks zero -bits. -

    Codebook entries marked ’unused’ are simply skipped in the assigning process. They have no -codeword and do not appear in the decision tree, thus it’s impossible for any bit pattern read -from the stream to decode to that entry number. - - - -

    VQ lookup table vector representation -Unpacking the VQ lookup table vectors relies on the following values: -

    -1  the [codebook_multiplicands] array -
    2  [codebook_minimum_value] -
    3  [codebook_delta_value] -
    4  [codebook_sequence_p] -
    5  [codebook_lookup_type] -
    6  [codebook_entries] -
    7  [codebook_dimensions] -
    8  [codebook_lookup_values] -
    -

    Decoding (unpacking) a specific vector in the vector lookup table proceeds according to -[codebook_lookup_type]. The unpacked vector values are what a codebook would return -during audio packet decode in a VQ context. -

    Vector value decode: Lookup type 1 -Lookup type one specifies a lattice VQ lookup table built algorithmically from a list of -scalar values. Calculate (unpack) the final values of a codebook entry vector from -the entries in [codebook_multiplicands] as follows ([value_vector] is the output -vector representing the vector of values for entry number [lookup_offset] in this -codebook): -

    -

    -1    1) [last] = 0; -
    2    2) [index_divisor] = 1; -
    3    3) iterate [i] over the range 0 ... [codebook_dimensions]-1 (once for each scalar value in the value vector) { -
    4   -
    5         4) [multiplicand_offset] = ( [lookup_offset] divided by [index_divisor] using integer -
    6            division ) integer modulo [codebook_lookup_values] -
    7   -
    8         5) vector [value_vector] element [i] = -
    9              ( [codebook_multiplicands] array element number [multiplicand_offset] ) * -
    10              [codebook_delta_value] + [codebook_minimum_value] + [last]; -
    11   -
    12         6) if ( [codebook_sequence_p] is set ) then set [last] = vector [value_vector] element [i] -
    13   -
    14         7) [index_divisor] = [index_divisor] * [codebook_lookup_values] -
    15   -
    16       } -
    17   -
    18    8) vector calculation completed. -
    - - - -

    Vector value decode: Lookup type 2 -Lookup type two specifies a VQ lookup table in which each scalar in each vector is explicitly set -by the [codebook_multiplicands] array in a one-to-one mapping. Calculate [unpack] the final -values of a codebook entry vector from the entries in [codebook_multiplicands] as follows -([value_vector] is the output vector representing the vector of values for entry number -[lookup_offset] in this codebook): -

    -

    -1    1) [last] = 0; -
    2    2) [multiplicand_offset] = [lookup_offset] * [codebook_dimensions] -
    3    3) iterate [i] over the range 0 ... [codebook_dimensions]-1 (once for each scalar value in the value vector) { -
    4   -
    5         4) vector [value_vector] element [i] = -
    6              ( [codebook_multiplicands] array element number [multiplicand_offset] ) * -
    7              [codebook_delta_value] + [codebook_minimum_value] + [last]; -
    8   -
    9         5) if ( [codebook_sequence_p] is set ) then set [last] = vector [value_vector] element [i] -
    10   -
    11         6) increment [multiplicand_offset] -
    12   -
    13       } -
    14   -
    15    7) vector calculation completed. -
    -

    -

    3.3 Use of the codebook abstraction

    -

    The decoder uses the codebook abstraction much as it does the bit-unpacking convention; a -specific codebook reads a codeword from the bitstream, decoding it into an entry number, and -then returns that entry number to the decoder (when used in a scalar entropy coding context), or -uses that entry number as an offset into the VQ lookup table, returning a vector of values (when -used in a context desiring a VQ value). Scalar or VQ context is always explicit; any -call to the codebook mechanism requests either a scalar entry number or a lookup -vector. -

    Note that VQ lookup type zero indicates that there is no lookup table; requesting -decode using a codebook of lookup type 0 in any context expecting a vector return -value (even in a case where a vector of dimension one) is forbidden. If decoder setup -or decode requests such an action, that is an error condition rendering the packet - - - -undecodable. -

    Using a codebook to read from the packet bitstream consists first of reading and decoding the -next codeword in the bitstream. The decoder reads bits until the accumulated bits match a -codeword in the codebook. This process can be though of as logically walking the -Huffman decode tree by reading one bit at a time from the bitstream, and using the -bit as a decision boolean to take the 0 branch (left in the above examples) or the 1 -branch (right in the above examples). Walking the tree finishes when the decode process -hits a leaf in the decision tree; the result is the entry number corresponding to that -leaf. Reading past the end of a packet propagates the ’end-of-stream’ condition to the -decoder. -

    When used in a scalar context, the resulting codeword entry is the desired return -value. -

    When used in a VQ context, the codeword entry number is used as an offset into the VQ lookup -table. The value returned to the decoder is the vector of scalars corresponding to this -offset. - - - - - - -

    4 Codec Setup and Packet Decode

    -

    -

    4.1 Overview

    -

    This document serves as the top-level reference document for the bit-by-bit decode specification -of Vorbis I. This document assumes a high-level understanding of the Vorbis decode -process, which is provided in Section 1, “Introduction and Description”. Section 2, -“Bitpacking Convention” covers reading and writing bit fields from and to bitstream -packets. -

    -

    4.2 Header decode and decode setup

    -

    A Vorbis bitstream begins with three header packets. The header packets are, in order, the -identification header, the comments header, and the setup header. All are required for decode -compliance. An end-of-packet condition during decoding the first or third header packet renders -the stream undecodable. End-of-packet decoding the comment header is a non-fatal error -condition. -

    -

    4.2.1 Common header decode
    -

    Each header packet begins with the same header fields. -

    -

    -1    1) [packet_type] : 8 bit value -
    2    2) 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73: the characters ’v’,’o’,’r’,’b’,’i’,’s’ as six octets -
    - - - -

    Decode continues according to packet type; the identification header is type 1, the comment -header type 3 and the setup header type 5 (these types are all odd as a packet with a leading -single bit of ’0’ is an audio packet). The packets must occur in the order of identification, -comment, setup. -

    -

    4.2.2 Identification header
    -

    The identification header is a short header of only a few fields used to declare the stream -definitively as Vorbis, and provide a few externally relevant pieces of information about the audio -stream. The identification header is coded as follows: -

    -

    -1   1) [vorbis_version] = read 32 bits as unsigned integer -
    2   2) [audio_channels] = read 8 bit integer as unsigned -
    3   3) [audio_sample_rate] = read 32 bits as unsigned integer -
    4   4) [bitrate_maximum] = read 32 bits as signed integer -
    5   5) [bitrate_nominal] = read 32 bits as signed integer -
    6   6) [bitrate_minimum] = read 32 bits as signed integer -
    7   7) [blocksize_0] = 2 exponent (read 4 bits as unsigned integer) -
    8   8) [blocksize_1] = 2 exponent (read 4 bits as unsigned integer) -
    9   9) [framing_flag] = read one bit -
    -

    [vorbis_version] is to read ’0’ in order to be compatible with this document. Both -[audio_channels] and [audio_sample_rate] must read greater than zero. Allowed final -blocksize values are 64, 128, 256, 512, 1024, 2048, 4096 and 8192 in Vorbis I. [blocksize_0] -must be less than or equal to [blocksize_1]. The framing bit must be nonzero. Failure to meet -any of these conditions renders a stream undecodable. -

    The bitrate fields above are used only as hints. The nominal bitrate field especially may be -considerably off in purely VBR streams. The fields are meaningful only when greater than -zero. -

      -
    • All three fields set to the same value implies a fixed rate, or tightly bounded, nearly - fixed-rate bitstream -
      • -
    • Only nominal set implies a VBR or ABR stream that averages the nominal bitrate - - - -
      • -
    • Maximum and or minimum set implies a VBR bitstream that obeys the bitrate limits -
      • -
    • None set indicates the encoder does not care to speculate.
    -

    -

    4.2.3 Comment header
    -

    Comment header decode and data specification is covered in Section 5, “comment field and -header specification”. -

    -

    4.2.4 Setup header
    -

    Vorbis codec setup is configurable to an extreme degree: -

    -

    - -

    PIC -

    Figure 6: decoder pipeline configuration
    -
    -

    The setup header contains the bulk of the codec setup information needed for decode. The setup -header contains, in order, the lists of codebook configurations, time-domain transform -configurations (placeholders in Vorbis I), floor configurations, residue configurations, channel -mapping configurations and mode configurations. It finishes with a framing bit of ’1’. Header -decode proceeds in the following order: -

    Codebooks - - - -

      -
    1. [vorbis_codebook_count] = read eight bits as unsigned integer and add one -
      2. -
    2. Decode [vorbis_codebook_count] codebooks in order as defined in Section 3, - “Probability Model and Codebooks”. Save each configuration, in order, in an array - of codebook configurations [vorbis_codebook_configurations].
    -

    Time domain transforms -These hooks are placeholders in Vorbis I. Nevertheless, the configuration placeholder values must -be read to maintain bitstream sync. -

    -

      -
    1. [vorbis_time_count] = read 6 bits as unsigned integer and add one -
      2. -
    2. read [vorbis_time_count] 16 bit values; each value should be zero. If any value is - nonzero, this is an error condition and the stream is undecodable.
    -

    Floors -Vorbis uses two floor types; header decode is handed to the decode abstraction of the appropriate -type. -

    -

      -
    1. [vorbis_floor_count] = read 6 bits as unsigned integer and add one -
      2. -
    2. For each [i] of [vorbis_floor_count] floor numbers: -
        -
      1. read the floor type: vector [vorbis_floor_types] element [i] = read 16 bits - as unsigned integer -
        2. -
      2. If the floor type is zero, decode the floor configuration as defined in Section 6, - “Floor type 0 setup and decode”; save this configuration in slot [i] of the floor - configuration array [vorbis_floor_configurations]. - - - -
        3. -
      3. If the floor type is one, decode the floor configuration as defined in Section 7, - “Floor type 1 setup and decode”; save this configuration in slot [i] of the floor - configuration array [vorbis_floor_configurations]. -
        4. -
      4. If the the floor type is greater than one, this stream is undecodable; ERROR - CONDITION
      -
    -

    Residues -Vorbis uses three residue types; header decode of each type is identical. -

    -

      -
    1. [vorbis_residue_count] = read 6 bits as unsigned integer and add one -
      2. -
    2. For each of [vorbis_residue_count] residue numbers: -
        -
      1. read the residue type; vector [vorbis_residue_types] element [i] = read 16 - bits as unsigned integer -
        2. -
      2. If the residue type is zero, one or two, decode the residue configuration as defined - in Section 8, “Residue setup and decode”; save this configuration in slot [i] of - the residue configuration array [vorbis_residue_configurations]. -
        3. -
      3. If the the residue type is greater than two, this stream is undecodable; ERROR - CONDITION
      -
    -

    Mappings -Mappings are used to set up specific pipelines for encoding multichannel audio with varying -channel mapping applications. Vorbis I uses a single mapping type (0), with implicit PCM -channel mappings. - - - -

    -

      -
    1. [vorbis_mapping_count] = read 6 bits as unsigned integer and add one -
      2. -
    2. For each [i] of [vorbis_mapping_count] mapping numbers: -
        -
      1. read the mapping type: 16 bits as unsigned integer. There’s no reason to save - the mapping type in Vorbis I. -
        2. -
      2. If the mapping type is nonzero, the stream is undecodable -
        3. -
      3. If the mapping type is zero: -
          -
        1. read 1 bit as a boolean flag -
            -
          1. if set, [vorbis_mapping_submaps] = read 4 bits as unsigned integer - and add one -
            2. -
          2. if unset, [vorbis_mapping_submaps] = 1
          -
          2. -
        2. read 1 bit as a boolean flag -
            -
          1. if set, square polar channel mapping is in use: -
              -
            • [vorbis_mapping_coupling_steps] = read 8 bits as unsigned - integer and add one -
              • -
            • for [j] each of [vorbis_mapping_coupling_steps] steps: -
                -
              • vector [vorbis_mapping_magnitude] element [j]= read - ilog([audio_channels] - 1) bits as unsigned integer -
                • -
              • vector [vorbis_mapping_angle] element [j]= read - ilog([audio_channels] - 1) bits as unsigned integer -
                • - - - -
              • the numbers read in the above two steps are channel numbers - representing the channel to treat as magnitude and the channel - to treat as angle, respectively. If for any coupling step the - angle channel number equals the magnitude channel number, the - magnitude channel number is greater than [audio_channels]-1, or - the angle channel is greater than [audio_channels]-1, the stream - is undecodable.
              -
            -
            2. -
          2. if unset, [vorbis_mapping_coupling_steps] = 0
          -
          3. -
        3. read 2 bits (reserved field); if the value is nonzero, the stream is undecodable -
          4. -
        4. if [vorbis_mapping_submaps] is greater than one, we read channel multiplex - settings. For each [j] of [audio_channels] channels: -
            -
          1. vector [vorbis_mapping_mux] element [j] = read 4 bits as unsigned - integer -
            2. -
          2. if the value is greater than the highest numbered submap - ([vorbis_mapping_submaps] - 1), this in an error condition rendering - the stream undecodable
          -
          5. -
        5. for each submap [j] of [vorbis_mapping_submaps] submaps, read the floor and - residue numbers for use in decoding that submap: -
            -
          1. read and discard 8 bits (the unused time configuration placeholder) -
            2. -
          2. read 8 bits as unsigned integer for the floor number; save in vector - [vorbis_mapping_submap_floor] element [j] -
            3. -
          3. verify the floor number is not greater than the highest number floor - configured for the bitstream. If it is, the bitstream is undecodable -
            4. -
          4. read 8 bits as unsigned integer for the residue number; save in vector - [vorbis_mapping_submap_residue] element [j] - - - -
            5. -
          5. verify the residue number is not greater than the highest number residue - configured for the bitstream. If it is, the bitstream is undecodable
          -
          6. -
        6. save this mapping configuration in slot [i] of the mapping configuration array - [vorbis_mapping_configurations].
        -
      -
    -

    Modes -

      -
    1. [vorbis_mode_count] = read 6 bits as unsigned integer and add one -
      2. -
    2. For each of [vorbis_mode_count] mode numbers: -
        -
      1. [vorbis_mode_blockflag] = read 1 bit -
        2. -
      2. [vorbis_mode_windowtype] = read 16 bits as unsigned integer -
        3. -
      3. [vorbis_mode_transformtype] = read 16 bits as unsigned integer -
        4. -
      4. [vorbis_mode_mapping] = read 8 bits as unsigned integer -
        5. -
      5. verify ranges; zero is the only legal value in - Vorbis I for [vorbis_mode_windowtype] and [vorbis_mode_transformtype]. - [vorbis_mode_mapping] must not be greater than the highest number mapping - in use. Any illegal values render the stream undecodable. -
        6. -
      6. save this mode configuration in slot [i] of the mode configuration array - [vorbis_mode_configurations].
      -
      3. -
    3. read 1 bit as a framing flag. If unset, a framing error occurred and the stream is not - decodable.
    - - - -

    After reading mode descriptions, setup header decode is complete. -

    -

    4.3 Audio packet decode and synthesis

    -

    Following the three header packets, all packets in a Vorbis I stream are audio. The first step of -audio packet decode is to read and verify the packet type. A non-audio packet when audio is -expected indicates stream corruption or a non-compliant stream. The decoder must ignore the -packet and not attempt decoding it to audio. -

    -

    4.3.1 packet type, mode and window decode
    -

    -

      -
    1. read 1 bit [packet_type]; check that packet type is 0 (audio) -
      2. -
    2. read ilog([vorbis˙mode˙count]-1) bits [mode_number] -
      3. -
    3. decode blocksize [n] is equal to [blocksize_0] if [vorbis_mode_blockflag] is 0, - else [n] is equal to [blocksize_1]. -
      4. -
    4. perform window selection and setup; this window is used later by the inverse - MDCT: -
        -
      1. if this is a long window (the [vorbis_mode_blockflag] flag of this mode is - set): -
          -
        1. read 1 bit for [previous_window_flag] -
          2. -
        2. read 1 bit for [next_window_flag] - - - -
          3. -
        3. if [previous_window_flag] is not set, the left half of the window will - be a hybrid window for lapping with a short block. See paragraph 1.3.2, - “Window shape decode (long windows only)” for an illustration of - overlapping dissimilar windows. Else, the left half window will have normal - long shape. -
          4. -
        4. if [next_window_flag] is not set, the right half of the window will be - a hybrid window for lapping with a short block. See paragraph 1.3.2, - “Window shape decode (long windows only)” for an illustration of - overlapping dissimilar windows. Else, the left right window will have normal - long shape.
        -
        2. -
      2. if this is a short window, the window is always the same short-window - shape.
      -
    -

    Vorbis windows all use the slope function y = sin(π2 ∗ sin 2((x + 0.5)∕n ∗ π)), where n is window -size and x ranges 0…n− 1, but dissimilar lapping requirements can affect overall shape. Window -generation proceeds as follows: -

    -

      -
    1. [window_center] = [n] / 2 -
      2. -
    2. if ([vorbis_mode_blockflag] is set and [previous_window_flag] is not set) - then -
        -
      1. [left_window_start] = [n]/4 - [blocksize_0]/4 -
        2. -
      2. [left_window_end] = [n]/4 + [blocksize_0]/4 -
        3. -
      3. [left_n] = [blocksize_0]/2
      -

      else -

        -
      1. [left_window_start] = 0 -
        2. -
      2. [left_window_end] = [window_center] - - - -
        3. -
      3. [left_n] = [n]/2
      -
      3. -
    3. if ([vorbis_mode_blockflag] is set and [next_window_flag] is not set) then -
        -
      1. [right_window_start] = [n]*3/4 - [blocksize_0]/4 -
        2. -
      2. [right_window_end] = [n]*3/4 + [blocksize_0]/4 -
        3. -
      3. [right_n] = [blocksize_0]/2
      -

      else -

        -
      1. [right_window_start] = [window_center] -
        2. -
      2. [right_window_end] = [n] -
        3. -
      3. [right_n] = [n]/2
      -
      4. -
    4. window from range 0 ... [left_window_start]-1 inclusive is zero -
      5. -
    5. for [i] in range [left_window_start] ... [left_window_end]-1, window([i]) = - sin(π -2 ∗ sin 2( ([i]-[left_window_start]+0.5) / [left_n] ∗π -2) ) -
      6. -
    6. window from range [left_window_end] ... [right_window_start]-1 inclusive is - one -
      7. -
    7. for [i] in range [right_window_start] ... [right_window_end]-1, window([i]) = - sin(π -2 ∗ sin 2( ([i]-[right_window_start]+0.5) / [right_n] ∗π -2 + π -2) ) -
      8. -
    8. window from range [right_window_start] ... [n]-1 is zero
    -

    An end-of-packet condition up to this point should be considered an error that discards this -packet from the stream. An end of packet condition past this point is to be considered a possible -nominal occurrence. - - - -

    -

    4.3.2 floor curve decode
    -

    From this point on, we assume out decode context is using mode number [mode_number] -from configuration array [vorbis_mode_configurations] and the map number -[vorbis_mode_mapping] (specified by the current mode) taken from the mapping configuration -array [vorbis_mapping_configurations]. -

    Floor curves are decoded one-by-one in channel order. -

    For each floor [i] of [audio_channels] -

      -
    1. [submap_number] = element [i] of vector [vorbis˙mapping˙mux] -
      2. -
    2. [floor_number] = element [submap_number] of vector [vorbis˙submap˙floor] -
      3. -
    3. if the floor type of this floor (vector - [vorbis_floor_types] element [floor_number]) is zero then decode the floor for - channel [i] according to the subsubsection 6.2.2, “packet decode” -
      4. -
    4. if the type of this floor is one then decode the floor for channel [i] according to the - paragraph 7.2.2, “packet decode” -
      5. -
    5. save the needed decoded floor information for channel for later synthesis -
      6. -
    6. if the decoded floor returned ’unused’, set vector [no_residue] element [i] to true, - else set vector [no_residue] element [i] to false
    -

    An end-of-packet condition during floor decode shall result in packet decode zeroing all channel -output vectors and skipping to the add/overlap output stage. -

    -

    4.3.3 nonzero vector propagate
    -

    A possible result of floor decode is that a specific vector is marked ’unused’ which indicates that -that final output vector is all-zero values (and the floor is zero). The residue for that vector is not -coded in the stream, save for one complication. If some vectors are used and some are not, - - - -channel coupling could result in mixing a zeroed and nonzeroed vector to produce two nonzeroed -vectors. -

    for each [i] from 0 ... [vorbis_mapping_coupling_steps]-1 -

    -

      -
    1. if either [no_residue] entry for channel ([vorbis_mapping_magnitude] element - [i]) or channel ([vorbis_mapping_angle] element [i]) are set to false, then both - must be set to false. Note that an ’unused’ floor has no decoded floor information; it - is important that this is remembered at floor curve synthesis time.
    -

    -

    4.3.4 residue decode
    -

    Unlike floors, which are decoded in channel order, the residue vectors are decoded in submap -order. -

    for each submap [i] in order from 0 ... [vorbis_mapping_submaps]-1 -

    -

      -
    1. [ch] = 0 -
      2. -
    2. for each channel [j] in order from 0 ... [audio_channels] - 1 -
        -
      1. if channel [j] in submap [i] (vector [vorbis_mapping_mux] element [j] is equal to - [i]) -
          -
        1. if vector [no_residue] element [j] is true -
            -
          1. vector [do_not_decode_flag] element [ch] is set
          -

          else -

            -
          1. vector [do_not_decode_flag] element [ch] is unset
          -
          2. -
        2. increment [ch]
        - - - -
      -
      3. -
    3. [residue_number] = vector [vorbis_mapping_submap_residue] element [i] -
      4. -
    4. [residue_type] = vector [vorbis_residue_types] element [residue_number] -
      5. -
    5. decode [ch] vectors using residue [residue_number], according to type [residue_type], - also passing vector [do_not_decode_flag] to indicate which vectors in the bundle should - not be decoded. Correct per-vector decode length is [n]/2. -
      6. -
    6. [ch] = 0 -
      7. -
    7. for each channel [j] in order from 0 ... [audio_channels] -
        -
      1. if channel [j] is in submap [i] (vector [vorbis_mapping_mux] element [j] is equal - to [i]) -
          -
        1. residue vector for channel [j] is set to decoded residue vector [ch] -
          2. -
        2. increment [ch]
        -
      -
    -

    -

    4.3.5 inverse coupling
    -

    for each [i] from [vorbis_mapping_coupling_steps]-1 descending to 0 -

    -

      -
    1. [magnitude_vector] = the residue vector for channel (vector - [vorbis_mapping_magnitude] element [i]) -
      2. -
    2. [angle_vector] = the residue vector for channel (vector [vorbis_mapping_angle] - - - - element [i]) -
      3. -
    3. for each scalar value [M] in vector [magnitude_vector] and the corresponding scalar value - [A] in vector [angle_vector]: -
        -
      1. if ([M] is greater than zero) -
          -
        1. if ([A] is greater than zero) -
            -
          1. [new_M] = [M] -
            2. -
          2. [new_A] = [M]-[A]
          -

          else -

            -
          1. [new_A] = [M] -
            2. -
          2. [new_M] = [M]+[A]
          -
        -

        else -

          -
        1. if ([A] is greater than zero) -
            -
          1. [new_M] = [M] -
            2. -
          2. [new_A] = [M]+[A]
          -

          else -

            -
          1. [new_A] = [M] -
            2. -
          2. [new_M] = [M]-[A]
          -
        -
        2. -
      2. set scalar value [M] in vector [magnitude_vector] to [new_M] - - - -
        3. -
      3. set scalar value [A] in vector [angle_vector] to [new_A]
      -
    -

    -

    4.3.6 dot product
    -

    For each channel, synthesize the floor curve from the decoded floor information, according to -packet type. Note that the vector synthesis length for floor computation is [n]/2. -

    For each channel, multiply each element of the floor curve by each element of that -channel’s residue vector. The result is the dot product of the floor and residue vectors for -each channel; the produced vectors are the length [n]/2 audio spectrum for each -channel. -

    One point is worth mentioning about this dot product; a common mistake in a fixed point -implementation might be to assume that a 32 bit fixed-point representation for floor and -residue and direct multiplication of the vectors is sufficient for acceptable spectral depth -in all cases because it happens to mostly work with the current Xiph.Org reference -encoder. -

    However, floor vector values can span ∼140dB (∼24 bits unsigned), and the audio spectrum -vector should represent a minimum of 120dB (∼21 bits with sign), even when output is to a 16 -bit PCM device. For the residue vector to represent full scale if the floor is nailed -to −140dB, it must be able to span 0 to +140dB. For the residue vector to reach -full scale if the floor is nailed at 0dB, it must be able to represent −140dB to +0dB. -Thus, in order to handle full range dynamics, a residue vector may span −140dB to -+140dB entirely within spec. A 280dB range is approximately 48 bits with sign; thus the -residue vector must be able to represent a 48 bit range and the dot product must -be able to handle an effective 48 bit times 24 bit multiplication. This range may be -achieved using large (64 bit or larger) integers, or implementing a movable binary point -representation. -

    -

    4.3.7 inverse MDCT
    -

    Convert the audio spectrum vector of each channel back into time domain PCM audio via an - - - -inverse Modified Discrete Cosine Transform (MDCT). A detailed description of the MDCT is -available in [1]. The window function used for the MDCT is the function described -earlier. -

    -

    4.3.8 overlap˙add
    -

    Windowed MDCT output is overlapped and added with the right hand data of the previous -window such that the 3/4 point of the previous window is aligned with the 1/4 point of the -current window (as illustrated in paragraph 1.3.2, “Window shape decode (long windows -only)”). The overlapped portion produced from overlapping the previous and current frame data -is finished data to be returned by the decoder. This data spans from the center of -the previous window to the center of the current window. In the case of same-sized -windows, the amount of data to return is one-half block consisting of and only of the -overlapped portions. When overlapping a short and long window, much of the returned -range does not actually overlap. This does not damage transform orthogonality. Pay -attention however to returning the correct data range; the amount of data to be returned -is: -

    -

    -1  window_blocksize(previous_window)/4+window_blocksize(current_window)/4 -
    -

    from the center (element windowsize/2) of the previous window to the center (element -windowsize/2-1, inclusive) of the current window. -

    Data is not returned from the first frame; it must be used to ’prime’ the decode engine. The -encoder accounts for this priming when calculating PCM offsets; after the first frame, the proper -PCM output offset is ’0’ (as no data has been returned yet). -

    -

    4.3.9 output channel order
    -

    Vorbis I specifies only a channel mapping type 0. In mapping type 0, channel mapping is -implicitly defined as follows for standard audio applications. As of revision 16781 (20100113), the -specification adds defined channel locations for 6.1 and 7.1 surround. Ordering/location for - - - -greater-than-eight channels remains ’left to the implementation’. -

    These channel orderings refer to order within the encoded stream. It is naturally possible for a -decoder to produce output with channels in any order. Any such decoder should explicitly -document channel reordering behavior. -

    -

    -one channel
    the stream is monophonic -
    -two channels
    the stream is stereo. channel order: left, right -
    -three channels
    the stream is a 1d-surround encoding. channel order: left, center, right -
    -four channels
    the stream is quadraphonic surround. channel order: front left, front right, - rear left, rear right -
    -five channels
    the stream is five-channel surround. channel order: front left, center, front - right, rear left, rear right -
    -six channels
    the stream is 5.1 surround. channel order: front left, center, front right, rear - left, rear right, LFE -
    -seven channels
    the stream is 6.1 surround. channel order: front left, center, front right, - side left, side right, rear center, LFE -
    -eight channels
    the stream is 7.1 surround. channel order: front left, center, front right, - side left, side right, rear left, rear right, LFE -
    -greater than eight channels
    channel use and order is defined by the application -
    -

    Applications using Vorbis for dedicated purposes may define channel mapping as seen fit. Future -channel mappings (such as three and four channel Ambisonics) will make use of channel -mappings other than mapping 0. - - - - - - -

    5 comment field and header specification

    -

    -

    5.1 Overview

    -

    The Vorbis text comment header is the second (of three) header packets that begin a Vorbis -bitstream. It is meant for short text comments, not arbitrary metadata; arbitrary metadata -belongs in a separate logical bitstream (usually an XML stream type) that provides greater -structure and machine parseability. -

    The comment field is meant to be used much like someone jotting a quick note on the bottom of -a CDR. It should be a little information to remember the disc by and explain it to others; a -short, to-the-point text note that need not only be a couple words, but isn’t going to be more -than a short paragraph. The essentials, in other words, whatever they turn out to be, -eg: -

    -

    -

    Honest Bob and the Factory-to-Dealer-Incentives, “I’m Still Around”, opening - for Moxy Früvous, 1997.

    -

    -

    5.2 Comment encoding

    -

    -

    5.2.1 Structure
    -

    The comment header is logically a list of eight-bit-clean vectors; the number of vectors is -bounded to 232 − 1 and the length of each vector is limited to 232 − 1 bytes. The vector length is - - - -encoded; the vector contents themselves are not null terminated. In addition to the vector list, -there is a single vector for vendor name (also 8 bit clean, length encoded in 32 bits). For -example, the 1.0 release of libvorbis set the vendor string to “Xiph.Org libVorbis I -20020717”. -

    The vector lengths and number of vectors are stored lsb first, according to the bit -packing conventions of the vorbis codec. However, since data in the comment header -is octet-aligned, they can simply be read as unaligned 32 bit little endian unsigned -integers. -

    The comment header is decoded as follows: -

    -

    -1    1) [vendor_length] = read an unsigned integer of 32 bits -
    2    2) [vendor_string] = read a UTF-8 vector as [vendor_length] octets -
    3    3) [user_comment_list_length] = read an unsigned integer of 32 bits -
    4    4) iterate [user_comment_list_length] times { -
    5         5) [length] = read an unsigned integer of 32 bits -
    6         6) this iteration’s user comment = read a UTF-8 vector as [length] octets -
    7       } -
    8    7) [framing_bit] = read a single bit as boolean -
    9    8) if ( [framing_bit] unset or end-of-packet ) then ERROR -
    10    9) done. -
    -

    -

    5.2.2 Content vector format
    -

    The comment vectors are structured similarly to a UNIX environment variable. That is, -comment fields consist of a field name and a corresponding value and look like: -

    -

    -

    -

    -1  comment[0]="ARTIST=me"; -
    2  comment[1]="TITLE=the sound of Vorbis"; -
    -
    - - - -

    The field name is case-insensitive and may consist of ASCII 0x20 through 0x7D, 0x3D (’=’) -excluded. ASCII 0x41 through 0x5A inclusive (characters A-Z) is to be considered equivalent to -ASCII 0x61 through 0x7A inclusive (characters a-z). -

    The field name is immediately followed by ASCII 0x3D (’=’); this equals sign is used to -terminate the field name. -

    0x3D is followed by 8 bit clean UTF-8 encoded value of the field contents to the end of the -field. -

    Field names -Below is a proposed, minimal list of standard field names with a description of intended use. No -single or group of field names is mandatory; a comment header may contain one, all or none of -the names in this list. -

    -

    -TITLE
    Track/Work name -
    -VERSION
    The version field may be used to differentiate multiple versions of the same - track title in a single collection. (e.g. remix info) -
    -ALBUM
    The collection name to which this track belongs -
    -TRACKNUMBER
    The track number of this piece if part of a specific larger collection or - album -
    -ARTIST
    The artist generally considered responsible for the work. In popular music this is - usually the performing band or singer. For classical music it would be the composer. - For an audio book it would be the author of the original text. -
    -PERFORMER
    The artist(s) who performed the work. In classical music this would be the - conductor, orchestra, soloists. In an audio book it would be the actor who did the - reading. In popular music this is typically the same as the ARTIST and is omitted. -
    -COPYRIGHT
    Copyright attribution, e.g., ’2001 Nobody’s Band’ or ’1999 Jack Moffitt’ -
    - - - -LICENSE
    License information, eg, ’All Rights Reserved’, ’Any Use Permitted’, a URL to - a license such as a Creative - Commons license (”www.creativecommons.org/blahblah/license.html”) or the EFF - Open Audio License (’distributed under the terms of the Open Audio License. see - http://www.eff.org/IP/Open˙licenses/eff˙oal.html for details’), etc. -
    -ORGANIZATION
    Name of the organization producing the track (i.e. the ’record label’) -
    -DESCRIPTION
    A short text description of the contents -
    -GENRE
    A short text indication of music genre -
    -DATE
    Date the track was recorded -
    -LOCATION
    Location where track was recorded -
    -CONTACT
    Contact information for the creators or distributors of the track. This could - be a URL, an email address, the physical address of the producing label. -
    -ISRC
    International Standard Recording Code for the track; see the ISRC intro page for - more information on ISRC numbers. -
    -

    Implications -Field names should not be ’internationalized’; this is a concession to simplicity not -an attempt to exclude the majority of the world that doesn’t speak English. Field -contents, however, use the UTF-8 character encoding to allow easy representation of any -language. -

    We have the length of the entirety of the field and restrictions on the field name so that -the field name is bounded in a known way. Thus we also have the length of the field -contents. -

    Individual ’vendors’ may use non-standard field names within reason. The proper -use of comment fields should be clear through context at this point. Abuse will be -discouraged. - - - -

    There is no vendor-specific prefix to ’nonstandard’ field names. Vendors should make some effort -to avoid arbitrarily polluting the common namespace. We will generally collect the more useful -tags here to help with standardization. -

    Field names are not required to be unique (occur once) within a comment header. As an -example, assume a track was recorded by three well know artists; the following is permissible, -and encouraged: -

    -

    -

    -

    -1  ARTIST=Dizzy Gillespie -
    2  ARTIST=Sonny Rollins -
    3  ARTIST=Sonny Stitt -
    -
    -

    -

    5.2.3 Encoding
    -

    The comment header comprises the entirety of the second bitstream header packet. Unlike the -first bitstream header packet, it is not generally the only packet on the second page and may not -be restricted to within the second bitstream page. The length of the comment header packet is -(practically) unbounded. The comment header packet is not optional; it must be present in the -bitstream even if it is effectively empty. -

    The comment header is encoded as follows (as per Ogg’s standard bitstream mapping which -renders least-significant-bit of the word to be coded into the least significant available bit of the -current bitstream octet first): -

    -

      -
    1. Vendor string length (32 bit unsigned quantity specifying number of octets) -
      2. -
    2. Vendor string ([vendor string length] octets coded from beginning of string to end of - string, not null terminated) - - - -
      3. -
    3. Number of comment fields (32 bit unsigned quantity specifying number of fields) -
      4. -
    4. Comment field 0 length (if [Number of comment fields] > 0; 32 bit unsigned quantity - specifying number of octets) -
      5. -
    5. Comment field 0 ([Comment field 0 length] octets coded from beginning of string to - end of string, not null terminated) -
      6. -
    6. Comment field 1 length (if [Number of comment fields] > 1...)... -
    -

    This is actually somewhat easier to describe in code; implementation of the above can be found -in vorbis/lib/info.c, _vorbis_pack_comment() and _vorbis_unpack_comment(). - - - - - - -

    6 Floor type 0 setup and decode

    -

    -

    6.1 Overview

    -

    Vorbis floor type zero uses Line Spectral Pair (LSP, also alternately known as Line Spectral -Frequency or LSF) representation to encode a smooth spectral envelope curve as the frequency -response of the LSP filter. This representation is equivalent to a traditional all-pole infinite -impulse response filter as would be used in linear predictive coding; LSP representation may be -converted to LPC representation and vice-versa. -

    -

    6.2 Floor 0 format

    -

    Floor zero configuration consists of six integer fields and a list of VQ codebooks for use in -coding/decoding the LSP filter coefficient values used by each frame. -

    -

    6.2.1 header decode
    -

    Configuration information for instances of floor zero decodes from the codec setup header (third -packet). configuration decode proceeds as follows: -

    -

    -1    1) [floor0_order] = read an unsigned integer of 8 bits -
    2    2) [floor0_rate] = read an unsigned integer of 16 bits -
    3    3) [floor0_bark_map_size] = read an unsigned integer of 16 bits -
    4    4) [floor0_amplitude_bits] = read an unsigned integer of six bits -
    5    5) [floor0_amplitude_offset] = read an unsigned integer of eight bits -
    6    6) [floor0_number_of_books] = read an unsigned integer of four bits and add 1 -
    7    7) array [floor0_book_list] = read a list of [floor0_number_of_books] unsigned integers of eight bits each; -
    - - - -

    An end-of-packet condition during any of these bitstream reads renders this stream undecodable. -In addition, any element of the array [floor0_book_list] that is greater than the maximum -codebook number for this bitstream is an error condition that also renders the stream -undecodable. -

    -

    6.2.2 packet decode
    -

    Extracting a floor0 curve from an audio packet consists of first decoding the curve -amplitude and [floor0_order] LSP coefficient values from the bitstream, and then -computing the floor curve, which is defined as the frequency response of the decoded LSP -filter. -

    Packet decode proceeds as follows: -

    -1    1) [amplitude] = read an unsigned integer of [floor0_amplitude_bits] bits -
    2    2) if ( [amplitude] is greater than zero ) { -
    3         3) [coefficients] is an empty, zero length vector -
    4         4) [booknumber] = read an unsigned integer of ilog( [floor0_number_of_books] ) bits -
    5         5) if ( [booknumber] is greater than the highest number decode codebook ) then packet is undecodable -
    6         6) [last] = zero; -
    7         7) vector [temp_vector] = read vector from bitstream using codebook number [floor0_book_list] element [booknumber] in VQ context. -
    8         8) add the scalar value [last] to each scalar in vector [temp_vector] -
    9         9) [last] = the value of the last scalar in vector [temp_vector] -
    10        10) concatenate [temp_vector] onto the end of the [coefficients] vector -
    11        11) if (length of vector [coefficients] is less than [floor0_order], continue at step 6 -
    12   -
    13       } -
    14   -
    15   12) done. -
    16   -
    -

    Take note of the following properties of decode: -

      -
    • An [amplitude] value of zero must result in a return code that indicates this channel - is unused in this frame (the output of the channel will be all-zeroes in synthesis). - Several later stages of decode don’t occur for an unused channel. -
      • -
    • An end-of-packet condition during decode should be considered a nominal occruence; - if end-of-packet is reached during any read operation above, floor decode is to return - ’unused’ status as if the [amplitude] value had read zero at the beginning of decode. -
      • -
    • The book number used for decode can, in fact, be stored in the bitstream in ilog( - - - - [floor0_number_of_books] - 1 ) bits. Nevertheless, the above specification is correct - and values greater than the maximum possible book value are reserved. -
      • -
    • The number of scalars read into the vector [coefficients] may be greater - than [floor0_order], the number actually required for curve computation. For - example, if the VQ codebook used for the floor currently being decoded has a - [codebook_dimensions] value of three and [floor0_order] is ten, the only way to - fill all the needed scalars in [coefficients] is to to read a total of twelve scalars - as four vectors of three scalars each. This is not an error condition, and care must - be taken not to allow a buffer overflow in decode. The extra values are not used and - may be ignored or discarded.
    -

    -

    6.2.3 curve computation
    -

    Given an [amplitude] integer and [coefficients] vector from packet decode as well -as the [floor0˙order], [floor0˙rate], [floor0˙bark˙map˙size], [floor0˙amplitude˙bits] and -[floor0˙amplitude˙offset] values from floor setup, and an output vector size [n] specified by the -decode process, we compute a floor output vector. -

    If the value [amplitude] is zero, the return value is a length [n] vector with all-zero -scalars. Otherwise, begin by assuming the following definitions for the given vector to be -synthesized: -

    - { - min (floor0xbarkxmapxsize − 1,foobar ) for i ∈ [0,n − 1 ] -mapi = − 1 for i = n -
    -

    -

    where -

    - ⌊ ⌋ - (floor0xrate ⋅ i) floor0xbarkxmapxsize -foobar = bark -------2n------- ⋅-bark(.5 ⋅ floor0xrate-) -
    - - - -

    -

    and -

    - 2 -bark(x) = 13.1arctan (.00074x ) + 2.24 arctan(.0000000185x + .0001x ) -
    -

    -

    The above is used to synthesize the LSP curve on a Bark-scale frequency axis, then map the -result to a linear-scale frequency axis. Similarly, the below calculation synthesizes the output -LSP curve [output] on a log (dB) amplitude scale, mapping it to linear amplitude in the last -step: -

    -

      -
    1. [i] = 0 -
      2. -
    2. [ω] = π * map element [i] / [floor0_bark_map_size] -
      3. -
    3. if ( [floor0_order] is odd ) -
        -
      1. calculate [p] and [q] according to:
        -
        - floor0xorder−3 - 2 ∏2 2 -p = (1 − cos ω) 4(cos([coefficients ]2j+1) − cosω ) - j=0 - floor0x∏or2der−1 -q = 1- 4(cos([coefficients ]2j) − cosω )2 - 4 j=0 - - - -
        -
        -
      -

      else [floor0_order] is even -

        -
      1. calculate [p] and [q] according to:
        -
        - floor0xorder−2 - (1 − cos2ω) ∏2 2 -p = -----2------ 4(cos([coefficients ]2j+1) − cosω ) - j=0 - 2 floor0xor2der−2 -q = (1 +-cos-ω)- ∏ 4(cos([coefficients ] ) − cosω )2 - 2 j=0 2j -
        -
        -
      -
      4. -
    4. calculate [linear_floor_value] according to: -
      - ( ( )) - amplitude---⋅ floor0xamplitutexoffset--- -exp .11512925 (2floor0xamplitudexbits − 1)√ p + q − floor0xamplitudexoffset -
      -

      -

      5. -
    5. [iteration_condition] = map element [i] - - - -
      6. -
    6. [output] element [i] = [linear_floor_value] -
      7. -
    7. increment [i] -
      8. -
    8. if ( map element [i] is equal to [iteration_condition] ) continue at step - 5 -
      9. -
    9. if ( [i] is less than [n] ) continue at step 2 -
      10. -
    10. done
    - - - - - - -

    7 Floor type 1 setup and decode

    -

    -

    7.1 Overview

    -

    Vorbis floor type one uses a piecewise straight-line representation to encode a spectral envelope -curve. The representation plots this curve mechanically on a linear frequency axis and a -logarithmic (dB) amplitude axis. The integer plotting algorithm used is similar to Bresenham’s -algorithm. -

    -

    7.2 Floor 1 format

    -

    -

    7.2.1 model
    -

    Floor type one represents a spectral curve as a series of line segments. Synthesis constructs a -floor curve using iterative prediction in a process roughly equivalent to the following simplified -description: -

      -
    • the first line segment (base case) is a logical line spanning from x˙0,y˙0 to x˙1,y˙1 - where in the base case x˙0=0 and x˙1=[n], the full range of the spectral floor to be - computed. -
      • -
    • the induction step chooses a point x˙new within an existing logical line segment and - produces a y˙new value at that point computed from the existing line’s y value at - x˙new (as plotted by the line) and a difference value decoded from the bitstream - packet. - - - -
      • -
    • floor computation produces two new line segments, one running from x˙0,y˙0 to - x˙new,y˙new and from x˙new,y˙new to x˙1,y˙1. This step is performed logically even if - y˙new represents no change to the amplitude value at x˙new so that later refinement - is additionally bounded at x˙new. -
      • -
    • the induction step repeats, using a list of x values specified in the codec setup header - at floor 1 initialization time. Computation is completed at the end of the x value list. -
    -

    Consider the following example, with values chosen for ease of understanding rather than -representing typical configuration: -

    For the below example, we assume a floor setup with an [n] of 128. The list of selected X values -in increasing order is 0,16,32,48,64,80,96,112 and 128. In list order, the values interleave as 0, -128, 64, 32, 96, 16, 48, 80 and 112. The corresponding list-order Y values as decoded from an -example packet are 110, 20, -5, -45, 0, -25, -10, 30 and -10. We compute the floor in the following -way, beginning with the first line: -

    -

    - -

    PIC -

    Figure 7: graph of example floor
    -
    -

    We now draw new logical lines to reflect the correction to new˙Y, and iterate for X positions 32 -and 96: -

    -

    - -

    PIC -

    Figure 8: graph of example floor
    -
    -

    Although the new Y value at X position 96 is unchanged, it is still used later as an endpoint for -further refinement. From here on, the pattern should be clear; we complete the floor computation -as follows: - - - -

    -

    - -

    PIC -

    Figure 9: graph of example floor
    -
    -
    -

    - -

    PIC -

    Figure 10: graph of example floor
    -
    -

    A more efficient algorithm with carefully defined integer rounding behavior is used for actual -decode, as described later. The actual algorithm splits Y value computation and line plotting -into two steps with modifications to the above algorithm to eliminate noise accumulation -through integer roundoff/truncation. -

    -

    7.2.2 header decode
    -

    A list of floor X values is stored in the packet header in interleaved format (used in list order -during packet decode and synthesis). This list is split into partitions, and each partition is -assigned to a partition class. X positions 0 and [n] are implicit and do not belong to an explicit -partition or partition class. -

    A partition class consists of a representation vector width (the number of Y values which -the partition class encodes at once), a ’subclass’ value representing the number of -alternate entropy books the partition class may use in representing Y values, the list of -[subclass] books and a master book used to encode which alternate books were chosen -for representation in a given packet. The master/subclass mechanism is meant to be -used as a flexible representation cascade while still using codebooks only in a scalar -context. - - - -

    -

    -1   -
    2    1) [floor1_partitions] = read 5 bits as unsigned integer -
    3    2) [maximum_class] = -1 -
    4    3) iterate [i] over the range 0 ... [floor1_partitions]-1 { -
    5   -
    6          4) vector [floor1_partition_class_list] element [i] = read 4 bits as unsigned integer -
    7   -
    8       } -
    9   -
    10    5) [maximum_class] = largest integer scalar value in vector [floor1_partition_class_list] -
    11    6) iterate [i] over the range 0 ... [maximum_class] { -
    12   -
    13          7) vector [floor1_class_dimensions] element [i] = read 3 bits as unsigned integer and add 1 -
    14   8) vector [floor1_class_subclasses] element [i] = read 2 bits as unsigned integer -
    15          9) if ( vector [floor1_class_subclasses] element [i] is nonzero ) { -
    16   -
    17               10) vector [floor1_class_masterbooks] element [i] = read 8 bits as unsigned integer -
    18   -
    19             } -
    20   -
    21         11) iterate [j] over the range 0 ... (2 exponent [floor1_class_subclasses] element [i]) - 1 { -
    22   -
    23               12) array [floor1_subclass_books] element [i],[j] = -
    24                   read 8 bits as unsigned integer and subtract one -
    25             } -
    26        } -
    27   -
    28   13) [floor1_multiplier] = read 2 bits as unsigned integer and add one -
    29   14) [rangebits] = read 4 bits as unsigned integer -
    30   15) vector [floor1_X_list] element [0] = 0 -
    31   16) vector [floor1_X_list] element [1] = 2 exponent [rangebits]; -
    32   17) [floor1_values] = 2 -
    33   18) iterate [i] over the range 0 ... [floor1_partitions]-1 { -
    34   -
    35         19) [current_class_number] = vector [floor1_partition_class_list] element [i] -
    36         20) iterate [j] over the range 0 ... ([floor1_class_dimensions] element [current_class_number])-1 { -
    37               21) vector [floor1_X_list] element ([floor1_values]) = -
    38                   read [rangebits] bits as unsigned integer -
    39               22) increment [floor1_values] by one -
    40             } -
    41       } -
    42   -
    43   23) done -
    -

    An end-of-packet condition while reading any aspect of a floor 1 configuration during -setup renders a stream undecodable. In addition, a [floor1_class_masterbooks] or -[floor1_subclass_books] scalar element greater than the highest numbered codebook -configured in this stream is an error condition that renders the stream undecodable. All vector -[floor1˙x˙list] element values must be unique within the vector; a non-unique value renders the -stream undecodable. -

    packet decode - - - -Packet decode begins by checking the [nonzero] flag: -

    -

    -1    1) [nonzero] = read 1 bit as boolean -
    -

    If [nonzero] is unset, that indicates this channel contained no audio energy in this frame. -Decode immediately returns a status indicating this floor curve (and thus this channel) is unused -this frame. (A return status of ’unused’ is different from decoding a floor that has all -points set to minimum representation amplitude, which happens to be approximately --140dB). -

    Assuming [nonzero] is set, decode proceeds as follows: -

    -

    -1    1) [range] = vector { 256, 128, 86, 64 } element ([floor1_multiplier]-1) -
    2    2) vector [floor1_Y] element [0] = read ilog([range]-1) bits as unsigned integer -
    3    3) vector [floor1_Y] element [1] = read ilog([range]-1) bits as unsigned integer -
    4    4) [offset] = 2; -
    5    5) iterate [i] over the range 0 ... [floor1_partitions]-1 { -
    6   -
    7         6) [class] = vector [floor1_partition_class]  element [i] -
    8         7) [cdim]  = vector [floor1_class_dimensions] element [class] -
    9         8) [cbits] = vector [floor1_class_subclasses] element [class] -
    10         9) [csub]  = (2 exponent [cbits])-1 -
    11        10) [cval]  = 0 -
    12        11) if ( [cbits] is greater than zero ) { -
    13   -
    14               12) [cval] = read from packet using codebook number -
    15                   (vector [floor1_class_masterbooks] element [class]) in scalar context -
    16            } -
    17   -
    18        13) iterate [j] over the range 0 ... [cdim]-1 { -
    19   -
    20               14) [book] = array [floor1_subclass_books] element [class],([cval] bitwise AND [csub]) -
    21               15) [cval] = [cval] right shifted [cbits] bits -
    22        16) if ( [book] is not less than zero ) { -
    23   -
    24              17) vector [floor1_Y] element ([j]+[offset]) = read from packet using codebook -
    25                         [book] in scalar context -
    26   -
    27                   } else [book] is less than zero { -
    28   -
    29              18) vector [floor1_Y] element ([j]+[offset]) = 0 -
    30   -
    31                   } -
    32            } -
    33   -
    34        19) [offset] = [offset] + [cdim] -
    35   -
    36       } -
    37   -
    38   20) done -
    - - - -

    An end-of-packet condition during curve decode should be considered a nominal occurrence; if -end-of-packet is reached during any read operation above, floor decode is to return ’unused’ -status as if the [nonzero] flag had been unset at the beginning of decode. -

    Vector [floor1_Y] contains the values from packet decode needed for floor 1 synthesis. -

    curve computation -Curve computation is split into two logical steps; the first step derives final Y amplitude values -from the encoded, wrapped difference values taken from the bitstream. The second step -plots the curve lines. Also, although zero-difference values are used in the iterative -prediction to find final Y values, these points are conditionally skipped during final -line computation in step two. Skipping zero-difference values allows a smoother line -fit. -

    Although some aspects of the below algorithm look like inconsequential optimizations, -implementors are warned to follow the details closely. Deviation from implementing a strictly -equivalent algorithm can result in serious decoding errors. -

    -

    -step 1: amplitude value synthesis
    -

    Unwrap the always-positive-or-zero values read from the packet into +/- difference - values, then apply to line prediction. -

    -

    -1    1) [range] = vector { 256, 128, 86, 64 } element ([floor1_multiplier]-1) -
    2    2) vector [floor1_step2_flag] element [0] = set -
    3    3) vector [floor1_step2_flag] element [1] = set -
    4    4) vector [floor1_final_Y] element [0] = vector [floor1_Y] element [0] -
    5    5) vector [floor1_final_Y] element [1] = vector [floor1_Y] element [1] -
    6    6) iterate [i] over the range 2 ... [floor1_values]-1 { -
    7   -
    8         7) [low_neighbor_offset] = low_neighbor([floor1_X_list],[i]) -
    9         8) [high_neighbor_offset] = high_neighbor([floor1_X_list],[i]) -
    10   -
    11         9) [predicted] = render_point( vector [floor1_X_list] element [low_neighbor_offset], -
    12         vector [floor1_final_Y] element [low_neighbor_offset], -
    13                                        vector [floor1_X_list] element [high_neighbor_offset], -
    14         vector [floor1_final_Y] element [high_neighbor_offset], -
    15                                        vector [floor1_X_list] element [i] ) -
    16   -
    17        10) [val] = vector [floor1_Y] element [i] -
    18        11) [highroom] = [range] - [predicted] -
    19        12) [lowroom]  = [predicted] -
    20        13) if ( [highroom] is less than [lowroom] ) { -
    21   -
    22              14) [room] = [highroom] * 2 - - - -
    23   -
    24            } else [highroom] is not less than [lowroom] { -
    25   -
    26              15) [room] = [lowroom] * 2 -
    27   -
    28            } -
    29   -
    30        16) if ( [val] is nonzero ) { -
    31   -
    32              17) vector [floor1_step2_flag] element [low_neighbor_offset] = set -
    33              18) vector [floor1_step2_flag] element [high_neighbor_offset] = set -
    34              19) vector [floor1_step2_flag] element [i] = set -
    35              20) if ( [val] is greater than or equal to [room] ) { -
    36   -
    37                    21) if ( [highroom] is greater than [lowroom] ) { -
    38   -
    39                          22) vector [floor1_final_Y] element [i] = [val] - [lowroom] + [predicted] -
    40   -
    41         } else [highroom] is not greater than [lowroom] { -
    42   -
    43                          23) vector [floor1_final_Y] element [i] = [predicted] - [val] + [highroom] - 1 -
    44   -
    45                        } -
    46   -
    47                  } else [val] is less than [room] { -
    48   -
    49     24) if ([val] is odd) { -
    50   -
    51                          25) vector [floor1_final_Y] element [i] = -
    52                              [predicted] - (([val] + 1) divided by  2 using integer division) -
    53   -
    54                        } else [val] is even { -
    55   -
    56                          26) vector [floor1_final_Y] element [i] = -
    57                              [predicted] + ([val] / 2 using integer division) -
    58   -
    59                        } -
    60   -
    61                  } -
    62   -
    63            } else [val] is zero { -
    64   -
    65              27) vector [floor1_step2_flag] element [i] = unset -
    66              28) vector [floor1_final_Y] element [i] = [predicted] -
    67   -
    68            } -
    69   -
    70       } -
    71   -
    72   29) done -
    73   -
    -
    -step 2: curve synthesis
    -

    Curve synthesis generates a return vector [floor] of length [n] (where [n] is provided by - the decode process calling to floor decode). Floor 1 curve synthesis makes use of the - [floor1_X_list], [floor1_final_Y] and [floor1_step2_flag] vectors, as well as - [floor1˙multiplier] and [floor1˙values] values. - - - -

    Decode begins by sorting the scalars from vectors [floor1_X_list], [floor1_final_Y] and - [floor1_step2_flag] together into new vectors [floor1_X_list]’, [floor1_final_Y]’ - and [floor1_step2_flag]’ according to ascending sort order of the values in - [floor1_X_list]. That is, sort the values of [floor1_X_list] and then apply the same - permutation to elements of the other two vectors so that the X, Y and step2˙flag values still - match. -

    Then compute the final curve in one pass: -

    -

    -1    1) [hx] = 0 -
    2    2) [lx] = 0 -
    3    3) [ly] = vector [floor1_final_Y]’ element [0] * [floor1_multiplier] -
    4    4) iterate [i] over the range 1 ... [floor1_values]-1 { -
    5   -
    6         5) if ( [floor1_step2_flag]’ element [i] is set ) { -
    7   -
    8               6) [hy] = [floor1_final_Y]’ element [i] * [floor1_multiplier] -
    9         7) [hx] = [floor1_X_list]’ element [i] -
    10               8) render_line( [lx], [ly], [hx], [hy], [floor] ) -
    11               9) [lx] = [hx] -
    12       10) [ly] = [hy] -
    13            } -
    14       } -
    15   -
    16   11) if ( [hx] is less than [n] ) { -
    17   -
    18          12) render_line( [hx], [hy], [n], [hy], [floor] ) -
    19   -
    20       } -
    21   -
    22   13) if ( [hx] is greater than [n] ) { -
    23   -
    24              14) truncate vector [floor] to [n] elements -
    25   -
    26       } -
    27   -
    28   15) for each scalar in vector [floor], perform a lookup substitution using -
    29       the scalar value from [floor] as an offset into the vector [floor1_inverse_dB_static_table] -
    30   -
    31   16) done -
    32   -
    -
    - - - -

    8 Residue setup and decode

    -

    -

    8.1 Overview

    -

    A residue vector represents the fine detail of the audio spectrum of one channel in an audio frame -after the encoder subtracts the floor curve and performs any channel coupling. A residue vector -may represent spectral lines, spectral magnitude, spectral phase or hybrids as mixed by channel -coupling. The exact semantic content of the vector does not matter to the residue -abstraction. -

    Whatever the exact qualities, the Vorbis residue abstraction codes the residue vectors into the -bitstream packet, and then reconstructs the vectors during decode. Vorbis makes use of three -different encoding variants (numbered 0, 1 and 2) of the same basic vector encoding -abstraction. -

    -

    8.2 Residue format

    -

    Residue format partitions each vector in the vector bundle into chunks, classifies each -chunk, encodes the chunk classifications and finally encodes the chunks themselves -using the the specific VQ arrangement defined for each selected classification. The -exact interleaving and partitioning vary by residue encoding number, however the -high-level process used to classify and encode the residue vector is the same in all three -variants. -

    A set of coded residue vectors are all of the same length. High level coding structure, ignoring for -the moment exactly how a partition is encoded and simply trusting that it is, is as -follows: -

      -
    • Each vector is partitioned into multiple equal sized chunks according to configuration - specified. If we have a vector size of n, a partition size residue˙partition˙size, and - a total of ch residue vectors, the total number of partitioned chunks coded is - - - - n/residue˙partition˙size*ch. It is important to note that the integer division truncates. - In the below example, we assume an example residue˙partition˙size of 8. -
      • -
    • Each partition in each vector has a classification number that specifies which of - multiple configured VQ codebook setups are used to decode that partition. The - classification numbers of each partition can be thought of as forming a vector in - their own right, as in the illustration below. Just as the residue vectors are coded - in grouped partitions to increase encoding efficiency, the classification vector is also - partitioned into chunks. The integer elements of each scalar in a classification chunk - are built into a single scalar that represents the classification numbers in that chunk. - In the below example, the classification codeword encodes two classification numbers. -
      • -
    • The values in a residue vector may be encoded monolithically in a single pass through - the residue vector, but more often efficient codebook design dictates that each vector - is encoded as the additive sum of several passes through the residue vector using - more than one VQ codebook. Thus, each residue value potentially accumulates values - from multiple decode passes. The classification value associated with a partition is - the same in each pass, thus the classification codeword is coded only in the first pass. -
    -
    -

    - -

    PIC -

    Figure 11: illustration of residue vector format
    -
    -

    -

    8.3 residue 0

    -

    Residue 0 and 1 differ only in the way the values within a residue partition are interleaved during -partition encoding (visually treated as a black box–or cyan box or brown box–in the above -figure). -

    Residue encoding 0 interleaves VQ encoding according to the dimension of the codebook used to - - - -encode a partition in a specific pass. The dimension of the codebook need not be the same in -multiple passes, however the partition size must be an even multiple of the codebook -dimension. -

    As an example, assume a partition vector of size eight, to be encoded by residue 0 using -codebook sizes of 8, 4, 2 and 1: -

    -

    -1   -
    2              original residue vector: [ 0 1 2 3 4 5 6 7 ] -
    3   -
    4  codebook dimensions = 8  encoded as: [ 0 1 2 3 4 5 6 7 ] -
    5   -
    6  codebook dimensions = 4  encoded as: [ 0 2 4 6 ], [ 1 3 5 7 ] -
    7   -
    8  codebook dimensions = 2  encoded as: [ 0 4 ], [ 1 5 ], [ 2 6 ], [ 3 7 ] -
    9   -
    10  codebook dimensions = 1  encoded as: [ 0 ], [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ], [ 7 ] -
    11   -
    -

    It is worth mentioning at this point that no configurable value in the residue coding setup is -restricted to a power of two. -

    -

    8.4 residue 1

    -

    Residue 1 does not interleave VQ encoding. It represents partition vector scalars in order. As -with residue 0, however, partition length must be an integer multiple of the codebook dimension, -although dimension may vary from pass to pass. -

    As an example, assume a partition vector of size eight, to be encoded by residue 0 using -codebook sizes of 8, 4, 2 and 1: -

    -

    -1   -
    2              original residue vector: [ 0 1 2 3 4 5 6 7 ] -
    3   -
    4  codebook dimensions = 8  encoded as: [ 0 1 2 3 4 5 6 7 ] -
    5   -
    6  codebook dimensions = 4  encoded as: [ 0 1 2 3 ], [ 4 5 6 7 ] -
    7   -
    8  codebook dimensions = 2  encoded as: [ 0 1 ], [ 2 3 ], [ 4 5 ], [ 6 7 ] -
    9   -
    10  codebook dimensions = 1  encoded as: [ 0 ], [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [ 6 ], [ 7 ] -
    11   - - - -
    -

    -

    8.5 residue 2

    -

    Residue type two can be thought of as a variant of residue type 1. Rather than encoding multiple -passed-in vectors as in residue type 1, the ch passed in vectors of length n are first interleaved -and flattened into a single vector of length ch*n. Encoding then proceeds as in type 1. Decoding -is as in type 1 with decode interleave reversed. If operating on a single vector to begin with, -residue type 1 and type 2 are equivalent. -

    -

    - -

    PIC -

    Figure 12: illustration of residue type 2
    -
    -

    -

    8.6 Residue decode

    -

    -

    8.6.1 header decode
    -

    Header decode for all three residue types is identical. -

    -1    1) [residue_begin] = read 24 bits as unsigned integer -
    2    2) [residue_end] = read 24 bits as unsigned integer -
    3    3) [residue_partition_size] = read 24 bits as unsigned integer and add one -
    4    4) [residue_classifications] = read 6 bits as unsigned integer and add one - - - -
    5    5) [residue_classbook] = read 8 bits as unsigned integer -
    -

    [residue_begin] and [residue_end] select the specific sub-portion of each vector that is -actually coded; it implements akin to a bandpass where, for coding purposes, the vector -effectively begins at element [residue_begin] and ends at [residue_end]. Preceding and -following values in the unpacked vectors are zeroed. Note that for residue type 2, these -values as well as [residue_partition_size]apply to the interleaved vector, not the -individual vectors before interleave. [residue_partition_size] is as explained above, -[residue_classifications] is the number of possible classification to which a partition can -belong and [residue_classbook] is the codebook number used to code classification -codewords. The number of dimensions in book [residue_classbook] determines how -many classification values are grouped into a single classification codeword. Note that -the number of entries and dimensions in book [residue_classbook], along with -[residue_classifications], overdetermines to possible number of classification -codewords. If [residue_classifications]ˆ[residue_classbook].dimensions exceeds -[residue_classbook].entries, the bitstream should be regarded to be undecodable. -

    Next we read a bitmap pattern that specifies which partition classes code values in which -passes. -

    -

    -1    1) iterate [i] over the range 0 ... [residue_classifications]-1 { -
    2   -
    3         2) [high_bits] = 0 -
    4         3) [low_bits] = read 3 bits as unsigned integer -
    5         4) [bitflag] = read one bit as boolean -
    6         5) if ( [bitflag] is set ) then [high_bits] = read five bits as unsigned integer -
    7         6) vector [residue_cascade] element [i] = [high_bits] * 8 + [low_bits] -
    8       } -
    9    7) done -
    -

    Finally, we read in a list of book numbers, each corresponding to specific bit set in the cascade -bitmap. We loop over the possible codebook classifications and the maximum possible number of -encoding stages (8 in Vorbis I, as constrained by the elements of the cascade bitmap being eight -bits): -

    -

    -1    1) iterate [i] over the range 0 ... [residue_classifications]-1 { -
    2   -
    3         2) iterate [j] over the range 0 ... 7 { -
    4   -
    5              3) if ( vector [residue_cascade] element [i] bit [j] is set ) { -
    6   -
    7                   4) array [residue_books] element [i][j] = read 8 bits as unsigned integer -
    8   -
    9                 } else { - - - -
    10   -
    11                   5) array [residue_books] element [i][j] = unused -
    12   -
    13                 } -
    14            } -
    15        } -
    16   -
    17    6) done -
    -

    An end-of-packet condition at any point in header decode renders the stream undecodable. -In addition, any codebook number greater than the maximum numbered codebook -set up in this stream also renders the stream undecodable. All codebooks in array -[residue˙books] are required to have a value mapping. The presence of codebook in array -[residue˙books] without a value mapping (maptype equals zero) renders the stream -undecodable. -

    -

    8.6.2 packet decode
    -

    Format 0 and 1 packet decode is identical except for specific partition interleave. Format 2 packet -decode can be built out of the format 1 decode process. Thus we describe first the decode -infrastructure identical to all three formats. -

    In addition to configuration information, the residue decode process is passed the number of -vectors in the submap bundle and a vector of flags indicating if any of the vectors are not to be -decoded. If the passed in number of vectors is 3 and vector number 1 is marked ’do not decode’, -decode skips vector 1 during the decode loop. However, even ’do not decode’ vectors are -allocated and zeroed. -

    Depending on the values of [residue_begin] and [residue_end], it is obvious that the -encoded portion of a residue vector may be the entire possible residue vector or some other strict -subset of the actual residue vector size with zero padding at either uncoded end. However, it is -also possible to set [residue_begin] and [residue_end] to specify a range partially or wholly -beyond the maximum vector size. Before beginning residue decode, limit [residue_begin] -and [residue_end] to the maximum possible vector size as follows. We assume that -the number of vectors being encoded, [ch] is provided by the higher level decoding -process. -

    -

    -1    1) [actual_size] = current blocksize/2; -
    2    2) if residue encoding is format 2 -
    3         3) [actual_size] = [actual_size] * [ch]; - - - -
    4    4) [limit_residue_begin] = maximum of ([residue_begin],[actual_size]); -
    5    5) [limit_residue_end] = maximum of ([residue_end],[actual_size]); -
    -

    The following convenience values are conceptually useful to clarifying the decode process: -

    -

    -1    1) [classwords_per_codeword] = [codebook_dimensions] value of codebook [residue_classbook] -
    2    2) [n_to_read] = [limit_residue_end] - [limit_residue_begin] -
    3    3) [partitions_to_read] = [n_to_read] / [residue_partition_size] -
    -

    Packet decode proceeds as follows, matching the description offered earlier in the document. -

    -1    1) allocate and zero all vectors that will be returned. -
    2    2) if ([n_to_read] is zero), stop; there is no residue to decode. -
    3    3) iterate [pass] over the range 0 ... 7 { -
    4   -
    5         4) [partition_count] = 0 -
    6   -
    7         5) while [partition_count] is less than [partitions_to_read] -
    8   -
    9              6) if ([pass] is zero) { -
    10   -
    11                   7) iterate [j] over the range 0 .. [ch]-1 { -
    12   -
    13                        8) if vector [j] is not marked ’do not decode’ { -
    14   -
    15                             9) [temp] = read from packet using codebook [residue_classbook] in scalar context -
    16                            10) iterate [i] descending over the range [classwords_per_codeword]-1 ... 0 { -
    17   -
    18                                 11) array [classifications] element [j],([i]+[partition_count]) = -
    19                                     [temp] integer modulo [residue_classifications] -
    20                                 12) [temp] = [temp] / [residue_classifications] using integer division -
    21   -
    22                                } -
    23   -
    24                           } -
    25   -
    26                      } -
    27   -
    28                 } -
    29   -
    30             13) iterate [i] over the range 0 .. ([classwords_per_codeword] - 1) while [partition_count] -
    31                 is also less than [partitions_to_read] { -
    32   -
    33                   14) iterate [j] over the range 0 .. [ch]-1 { -
    34   -
    35                        15) if vector [j] is not marked ’do not decode’ { -
    36   -
    37                             16) [vqclass] = array [classifications] element [j],[partition_count] -
    38                             17) [vqbook] = array [residue_books] element [vqclass],[pass] -
    39                             18) if ([vqbook] is not ’unused’) { -
    40   -
    41                                  19) decode partition into output vector number [j], starting at scalar -
    42                                      offset [limit_residue_begin]+[partition_count]*[residue_partition_size] using -
    43                                      codebook number [vqbook] in VQ context -
    44                            } - - - -
    45                       } -
    46   -
    47                   20) increment [partition_count] by one -
    48   -
    49                 } -
    50            } -
    51       } -
    52   -
    53   21) done -
    54   -
    -

    An end-of-packet condition during packet decode is to be considered a nominal occurrence. -Decode returns the result of vector decode up to that point. -

    -

    8.6.3 format 0 specifics
    -

    Format zero decodes partitions exactly as described earlier in the ’Residue Format: residue 0’ -section. The following pseudocode presents the same algorithm. Assume: -

      -
    • [n] is the value in [residue_partition_size] -
      • -
    • [v] is the residue vector -
      • -
    • [offset] is the beginning read offset in [v]
    -

    -

    -1   1) [step] = [n] / [codebook_dimensions] -
    2   2) iterate [i] over the range 0 ... [step]-1 { -
    3   -
    4        3) vector [entry_temp] = read vector from packet using current codebook in VQ context -
    5        4) iterate [j] over the range 0 ... [codebook_dimensions]-1 { -
    6   -
    7             5) vector [v] element ([offset]+[i]+[j]*[step]) = -
    8           vector [v] element ([offset]+[i]+[j]*[step]) + -
    9                  vector [entry_temp] element [j] -
    10   -
    11           } -
    12   -
    13      } -
    14   -
    15    6) done -
    16   - - - -
    -

    -

    8.6.4 format 1 specifics
    -

    Format 1 decodes partitions exactly as described earlier in the ’Residue Format: residue 1’ -section. The following pseudocode presents the same algorithm. Assume: -

      -
    • [n] is the value in [residue_partition_size] -
      • -
    • [v] is the residue vector -
      • -
    • [offset] is the beginning read offset in [v]
    -

    -

    -1   1) [i] = 0 -
    2   2) vector [entry_temp] = read vector from packet using current codebook in VQ context -
    3   3) iterate [j] over the range 0 ... [codebook_dimensions]-1 { -
    4   -
    5        4) vector [v] element ([offset]+[i]) = -
    6     vector [v] element ([offset]+[i]) + -
    7            vector [entry_temp] element [j] -
    8        5) increment [i] -
    9   -
    10      } -
    11   -
    12    6) if ( [i] is less than [n] ) continue at step 2 -
    13    7) done -
    -

    -

    8.6.5 format 2 specifics
    -

    Format 2 is reducible to format 1. It may be implemented as an additional step prior to and an -additional post-decode step after a normal format 1 decode. - - - -

    Format 2 handles ’do not decode’ vectors differently than residue 0 or 1; if all vectors are marked -’do not decode’, no decode occurrs. However, if at least one vector is to be decoded, all -the vectors are decoded. We then request normal format 1 to decode a single vector -representing all output channels, rather than a vector for each channel. After decode, -deinterleave the vector into independent vectors, one for each output channel. That -is: -

    -

      -
    1. If all vectors 0 through ch-1 are marked ’do not decode’, allocate and clear a single - vector [v]of length ch*n and skip step 2 below; proceed directly to the post-decode - step. -
      2. -
    2. Rather than performing format 1 decode to produce ch vectors of length n each, call - format 1 decode to produce a single vector [v] of length ch*n. -
      3. -
    3. Post decode: Deinterleave the single vector [v] returned by format 1 decode as - described above into ch independent vectors, one for each outputchannel, according - to: -
      -1    1) iterate [i] over the range 0 ... [n]-1 { -
      2   -
      3         2) iterate [j] over the range 0 ... [ch]-1 { -
      4   -
      5              3) output vector number [j] element [i] = vector [v] element ([i] * [ch] + [j]) -
      6   -
      7            } -
      8       } -
      9   -
      10    4) done -
      -
    - - - - - - -

    9 Helper equations

    -

    -

    9.1 Overview

    -

    The equations below are used in multiple places by the Vorbis codec specification. Rather than -cluttering up the main specification documents, they are defined here and referenced where -appropriate. -

    -

    9.2 Functions

    -

    -

    9.2.1 ilog
    -

    The ”ilog(x)” function returns the position number (1 through n) of the highest set bit in the -two’s complement integer value [x]. Values of [x] less than zero are defined to return -zero. -

    -

    -1    1) [return_value] = 0; -
    2    2) if ( [x] is greater than zero ) { -
    3   -
    4         3) increment [return_value]; -
    5         4) logical shift [x] one bit to the right, padding the MSb with zero -
    6         5) repeat at step 2) -
    7   -
    8       } -
    9   -
    10     6) done -
    - - - -

    Examples: -

      -
    • ilog(0) = 0; -
      • -
    • ilog(1) = 1; -
      • -
    • ilog(2) = 2; -
      • -
    • ilog(3) = 2; -
      • -
    • ilog(4) = 3; -
      • -
    • ilog(7) = 3; -
      • -
    • ilog(negative number) = 0;
    -

    -

    9.2.2 float32˙unpack
    -

    ”float32˙unpack(x)” is intended to translate the packed binary representation of a Vorbis -codebook float value into the representation used by the decoder for floating point numbers. For -purposes of this example, we will unpack a Vorbis float32 into a host-native floating point -number. -

    -

    -1    1) [mantissa] = [x] bitwise AND 0x1fffff (unsigned result) -
    2    2) [sign] = [x] bitwise AND 0x80000000 (unsigned result) -
    3    3) [exponent] = ( [x] bitwise AND 0x7fe00000) shifted right 21 bits (unsigned result) -
    4    4) if ( [sign] is nonzero ) then negate [mantissa] -
    5    5) return [mantissa] * ( 2 ^ ( [exponent] - 788 ) ) -
    - - - -

    -

    9.2.3 lookup1˙values
    -

    ”lookup1˙values(codebook˙entries,codebook˙dimensions)” is used to compute the correct length of -the value index for a codebook VQ lookup table of lookup type 1. The values on this list are -permuted to construct the VQ vector lookup table of size [codebook_entries]. -

    The return value for this function is defined to be ’the greatest integer value for which -[return_value] to the power of [codebook_dimensions] is less than or equal to -[codebook_entries]’. -

    -

    9.2.4 low˙neighbor
    -

    ”low˙neighbor(v,x)” finds the position n in vector [v] of the greatest value scalar element for -which n is less than [x] and vector [v] element n is less than vector [v] element -[x]. -

    -

    9.2.5 high˙neighbor
    -

    ”high˙neighbor(v,x)” finds the position n in vector [v] of the lowest value scalar element for -which n is less than [x] and vector [v] element n is greater than vector [v] element -[x]. -

    -

    9.2.6 render˙point
    -

    ”render˙point(x0,y0,x1,y1,X)” is used to find the Y value at point X along the line specified by -x0, x1, y0 and y1. This function uses an integer algorithm to solve for the point directly without -calculating intervening values along the line. -

    - - - -

    -1    1)  [dy] = [y1] - [y0] -
    2    2) [adx] = [x1] - [x0] -
    3    3) [ady] = absolute value of [dy] -
    4    4) [err] = [ady] * ([X] - [x0]) -
    5    5) [off] = [err] / [adx] using integer division -
    6    6) if ( [dy] is less than zero ) { -
    7   -
    8         7) [Y] = [y0] - [off] -
    9   -
    10       } else { -
    11   -
    12         8) [Y] = [y0] + [off] -
    13   -
    14       } -
    15   -
    16    9) done -
    -

    -

    9.2.7 render˙line
    -

    Floor decode type one uses the integer line drawing algorithm of ”render˙line(x0, y0, x1, y1, v)” -to construct an integer floor curve for contiguous piecewise line segments. Note that it has not -been relevant elsewhere, but here we must define integer division as rounding division of both -positive and negative numbers toward zero. -

    -

    -1    1)   [dy] = [y1] - [y0] -
    2    2)  [adx] = [x1] - [x0] -
    3    3)  [ady] = absolute value of [dy] -
    4    4) [base] = [dy] / [adx] using integer division -
    5    5)    [x] = [x0] -
    6    6)    [y] = [y0] -
    7    7)  [err] = 0 -
    8   -
    9    8) if ( [dy] is less than 0 ) { -
    10   -
    11          9) [sy] = [base] - 1 -
    12   -
    13       } else { -
    14   -
    15         10) [sy] = [base] + 1 -
    16   -
    17       } -
    18   -
    19   11) [ady] = [ady] - (absolute value of [base]) * [adx] -
    20   12) vector [v] element [x] = [y] -
    21   -
    22   13) iterate [x] over the range [x0]+1 ... [x1]-1 { -
    23   -
    24         14) [err] = [err] + [ady]; - - - -
    25         15) if ( [err] >= [adx] ) { -
    26   -
    27               16) [err] = [err] - [adx] -
    28               17)   [y] = [y] + [sy] -
    29   -
    30             } else { -
    31   -
    32               18) [y] = [y] + [base] -
    33   -
    34             } -
    35   -
    36         19) vector [v] element [x] = [y] -
    37   -
    38       } -
    - - - - - - -

    10 Tables

    -

    -

    10.1 floor1_inverse_dB_table

    -

    The vector [floor1_inverse_dB_table] is a 256 element static lookup table consiting of the -following values (read left to right then top to bottom): -

    -

    -1    1.0649863e-07, 1.1341951e-07, 1.2079015e-07, 1.2863978e-07, -
    2    1.3699951e-07, 1.4590251e-07, 1.5538408e-07, 1.6548181e-07, -
    3    1.7623575e-07, 1.8768855e-07, 1.9988561e-07, 2.1287530e-07, -
    4    2.2670913e-07, 2.4144197e-07, 2.5713223e-07, 2.7384213e-07, -
    5    2.9163793e-07, 3.1059021e-07, 3.3077411e-07, 3.5226968e-07, -
    6    3.7516214e-07, 3.9954229e-07, 4.2550680e-07, 4.5315863e-07, -
    7    4.8260743e-07, 5.1396998e-07, 5.4737065e-07, 5.8294187e-07, -
    8    6.2082472e-07, 6.6116941e-07, 7.0413592e-07, 7.4989464e-07, -
    9    7.9862701e-07, 8.5052630e-07, 9.0579828e-07, 9.6466216e-07, -
    10    1.0273513e-06, 1.0941144e-06, 1.1652161e-06, 1.2409384e-06, -
    11    1.3215816e-06, 1.4074654e-06, 1.4989305e-06, 1.5963394e-06, -
    12    1.7000785e-06, 1.8105592e-06, 1.9282195e-06, 2.0535261e-06, -
    13    2.1869758e-06, 2.3290978e-06, 2.4804557e-06, 2.6416497e-06, -
    14    2.8133190e-06, 2.9961443e-06, 3.1908506e-06, 3.3982101e-06, -
    15    3.6190449e-06, 3.8542308e-06, 4.1047004e-06, 4.3714470e-06, -
    16    4.6555282e-06, 4.9580707e-06, 5.2802740e-06, 5.6234160e-06, -
    17    5.9888572e-06, 6.3780469e-06, 6.7925283e-06, 7.2339451e-06, -
    18    7.7040476e-06, 8.2047000e-06, 8.7378876e-06, 9.3057248e-06, -
    19    9.9104632e-06, 1.0554501e-05, 1.1240392e-05, 1.1970856e-05, -
    20    1.2748789e-05, 1.3577278e-05, 1.4459606e-05, 1.5399272e-05, -
    21    1.6400004e-05, 1.7465768e-05, 1.8600792e-05, 1.9809576e-05, -
    22    2.1096914e-05, 2.2467911e-05, 2.3928002e-05, 2.5482978e-05, -
    23    2.7139006e-05, 2.8902651e-05, 3.0780908e-05, 3.2781225e-05, -
    24    3.4911534e-05, 3.7180282e-05, 3.9596466e-05, 4.2169667e-05, -
    25    4.4910090e-05, 4.7828601e-05, 5.0936773e-05, 5.4246931e-05, -
    26    5.7772202e-05, 6.1526565e-05, 6.5524908e-05, 6.9783085e-05, -
    27    7.4317983e-05, 7.9147585e-05, 8.4291040e-05, 8.9768747e-05, -
    28    9.5602426e-05, 0.00010181521, 0.00010843174, 0.00011547824, -
    29    0.00012298267, 0.00013097477, 0.00013948625, 0.00014855085, -
    30    0.00015820453, 0.00016848555, 0.00017943469, 0.00019109536, -
    31    0.00020351382, 0.00021673929, 0.00023082423, 0.00024582449, -
    32    0.00026179955, 0.00027881276, 0.00029693158, 0.00031622787, -
    33    0.00033677814, 0.00035866388, 0.00038197188, 0.00040679456, -
    34    0.00043323036, 0.00046138411, 0.00049136745, 0.00052329927, -
    35    0.00055730621, 0.00059352311, 0.00063209358, 0.00067317058, -
    36    0.00071691700, 0.00076350630, 0.00081312324, 0.00086596457, -
    37    0.00092223983, 0.00098217216, 0.0010459992,  0.0011139742, -
    38    0.0011863665,  0.0012634633,  0.0013455702,  0.0014330129, -
    39    0.0015261382,  0.0016253153,  0.0017309374,  0.0018434235, -
    40    0.0019632195,  0.0020908006,  0.0022266726,  0.0023713743, -
    41    0.0025254795,  0.0026895994,  0.0028643847,  0.0030505286, -
    42    0.0032487691,  0.0034598925,  0.0036847358,  0.0039241906, - - - -
    43    0.0041792066,  0.0044507950,  0.0047400328,  0.0050480668, -
    44    0.0053761186,  0.0057254891,  0.0060975636,  0.0064938176, -
    45    0.0069158225,  0.0073652516,  0.0078438871,  0.0083536271, -
    46    0.0088964928,  0.009474637,   0.010090352,   0.010746080, -
    47    0.011444421,   0.012188144,   0.012980198,   0.013823725, -
    48    0.014722068,   0.015678791,   0.016697687,   0.017782797, -
    49    0.018938423,   0.020169149,   0.021479854,   0.022875735, -
    50    0.024362330,   0.025945531,   0.027631618,   0.029427276, -
    51    0.031339626,   0.033376252,   0.035545228,   0.037855157, -
    52    0.040315199,   0.042935108,   0.045725273,   0.048696758, -
    53    0.051861348,   0.055231591,   0.058820850,   0.062643361, -
    54    0.066714279,   0.071049749,   0.075666962,   0.080584227, -
    55    0.085821044,   0.091398179,   0.097337747,   0.10366330, -
    56    0.11039993,    0.11757434,    0.12521498,    0.13335215, -
    57    0.14201813,    0.15124727,    0.16107617,    0.17154380, -
    58    0.18269168,    0.19456402,    0.20720788,    0.22067342, -
    59    0.23501402,    0.25028656,    0.26655159,    0.28387361, -
    60    0.30232132,    0.32196786,    0.34289114,    0.36517414, -
    61    0.38890521,    0.41417847,    0.44109412,    0.46975890, -
    62    0.50028648,    0.53279791,    0.56742212,    0.60429640, -
    63    0.64356699,    0.68538959,    0.72993007,    0.77736504, -
    64    0.82788260,    0.88168307,    0.9389798,     1. -
    - - - - - - -

    A Embedding Vorbis into an Ogg stream

    -

    -

    A.1 Overview

    -

    This document describes using Ogg logical and physical transport streams to encapsulate Vorbis -compressed audio packet data into file form. -

    The Section 1, “Introduction and Description” provides an overview of the construction of -Vorbis audio packets. -

    The Ogg bitstream overview and Ogg logical bitstream and framing spec provide detailed -descriptions of Ogg transport streams. This specification document assumes a working -knowledge of the concepts covered in these named backround documents. Please read them -first. -

    -

    A.1.1 Restrictions
    -

    The Ogg/Vorbis I specification currently dictates that Ogg/Vorbis streams use Ogg transport -streams in degenerate, unmultiplexed form only. That is: -

      -
    • A meta-headerless Ogg file encapsulates the Vorbis I packets -
      • -
    • The Ogg stream may be chained, i.e., contain multiple, contigous logical streams - (links). -
      • -
    • The Ogg stream must be unmultiplexed (only one stream, a Vorbis audio stream, - per link) -
    - - - -

    This is not to say that it is not currently possible to multiplex Vorbis with other media -types into a multi-stream Ogg file. At the time this document was written, Ogg was -becoming a popular container for low-bitrate movies consisting of DivX video and Vorbis -audio. However, a ’Vorbis I audio file’ is taken to imply Vorbis audio existing alone -within a degenerate Ogg stream. A compliant ’Vorbis audio player’ is not required to -implement Ogg support beyond the specific support of Vorbis within a degenrate Ogg -stream (naturally, application authors are encouraged to support full multiplexed Ogg -handling). -

    -

    A.1.2 MIME type
    -

    The MIME type of Ogg files depend on the context. Specifically, complex multimedia and -applications should use application/ogg, while visual media should use video/ogg, and audio -audio/ogg. Vorbis data encapsulated in Ogg may appear in any of those types. RTP -encapsulated Vorbis should use audio/vorbis + audio/vorbis-config. -

    -

    A.2 Encapsulation

    -

    Ogg encapsulation of a Vorbis packet stream is straightforward. -

      -
    • The first Vorbis packet (the identification header), which uniquely identifies a stream - as Vorbis audio, is placed alone in the first page of the logical Ogg stream. This - results in a first Ogg page of exactly 58 bytes at the very beginning of the logical - stream. -
      • -
    • This first page is marked ’beginning of stream’ in the page flags. -
      • -
    • The second and third vorbis packets (comment and setup headers) may span one or - more pages beginning on the second page of the logical stream. However many pages - they span, the third header packet finishes the page on which it ends. The next (first - audio) packet must begin on a fresh page. - - - -
      • -
    • The granule position of these first pages containing only headers is zero. -
      • -
    • The first audio packet of the logical stream begins a fresh Ogg page. -
      • -
    • Packets are placed into ogg pages in order until the end of stream. -
      • -
    • The last page is marked ’end of stream’ in the page flags. -
      • -
    • Vorbis packets may span page boundaries. -
      • -
    • The granule position of pages containing Vorbis audio is in units of PCM audio - samples (per channel; a stereo stream’s granule position does not increment at twice - the speed of a mono stream). -
      • -
    • The granule position of a page represents the end PCM sample position of the last - packet completed on that page. The ’last PCM sample’ is the last complete sample - returned by decode, not an internal sample awaiting lapping with a subsequent block. - A page that is entirely spanned by a single packet (that completes on a subsequent - page) has no granule position, and the granule position is set to ’-1’. -

      Note that the last decoded (fully lapped) PCM sample from a packet is not - necessarily the middle sample from that block. If, eg, the current Vorbis packet - encodes a ”long block” and the next Vorbis packet encodes a ”short block”, the last - decodable sample from the current packet be at position (3*long_block_length/4) - - (short_block_length/4). -

      • -
    • The granule (PCM) position of the first page need not indicate that the stream - started at position zero. Although the granule position belongs to the last completed - packet on the page and a valid granule position must be positive, by inference it may - indicate that the PCM position of the beginning of audio is positive or negative. -
        -
      • A positive starting value simply indicates that this stream begins at some - positive time offset, potentially within a larger program. This is a common case - when connecting to the middle of broadcast stream. -
        • -
      • A negative value indicates that output samples preceeding time zero should be - - - - discarded during decoding; this technique is used to allow sample-granularity - editing of the stream start time of already-encoded Vorbis streams. The number - of samples to be discarded must not exceed the overlap-add span of the first two - audio packets. -
      -

      In both of these cases in which the initial audio PCM starting offset is nonzero, the - second finished audio packet must flush the page on which it appears and the - third packet begin a fresh page. This allows the decoder to always be able to - perform PCM position adjustments before needing to return any PCM data from - synthesis, resulting in correct positioning information without any aditional seeking - logic. -

      Note: Failure to do so should, at worst, cause a decoder implementation to return - incorrect positioning information for seeking operations at the very beginning of the - stream. -

      • -
    • A granule position on the final page in a stream that indicates less audio data than the - final packet would normally return is used to end the stream on other than even frame - boundaries. The difference between the actual available data returned and the - declared amount indicates how many trailing samples to discard from the decoding - process. -
    - - - -

    B Vorbis encapsulation in RTP

    -

    Please consult RFC 5215 “RTP Payload Format for Vorbis Encoded Audio” for description of -how to embed Vorbis audio in an RTP stream. - - - - - - -

    Colophon

    -

    PIC -

    Ogg is a Xiph.org Foundation effort to protect essential tenets of Internet multimedia from -corporate hostage-taking; Open Source is the net’s greatest tool to keep everyone honest. See -About the Xiph.org Foundation for details. -

    Ogg Vorbis is the first Ogg audio CODEC. Anyone may freely use and distribute the Ogg and -Vorbis specification, whether in a private, public or corporate capacity. However, the Xiph.org -Foundation and the Ogg project (xiph.org) reserve the right to set the Ogg Vorbis specification -and certify specification compliance. -

    Xiph.org’s Vorbis software CODEC implementation is distributed under a BSD-like license. This -does not restrict third parties from distributing independent implementations of Vorbis software -under other licenses. -

    Ogg, Vorbis, Xiph.org Foundation and their logos are trademarks (tm) of the Xiph.org -Foundation. These pages are copyright (C) 1994-2007 Xiph.org Foundation. All rights -reserved. -

    This document is set using LATEX. - - - -

    References

    -

    -

    -

    - [1]   T. Sporer, K. Brandenburg and - B. Edler, The use of multirate filter banks for coding of high quality digital audio, - http://www.iocon.com/resource/docs/ps/eusipco_corrected.ps. -

    -
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00000 n -0000415148 00000 n -0000415283 00000 n -0000415423 00000 n -0000415527 00000 n -0000415645 00000 n -0000415764 00000 n -0000415858 00000 n -0000415898 00000 n -0000416030 00000 n -trailer -<< /Size 1242 -/Root 1240 0 R -/Info 1241 0 R -/ID [ ] >> -startxref -416362 -%%EOF diff --git a/ExternalLibs/libvorbis-1.3.1/doc/Vorbis_I_spec.tex b/ExternalLibs/libvorbis-1.3.1/doc/Vorbis_I_spec.tex deleted file mode 100644 index 6e9ceef..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/Vorbis_I_spec.tex +++ /dev/null @@ -1,132 +0,0 @@ -% $Id$ -\documentclass[12pt,paper=a4]{scrartcl} - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% Packages -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -% ... -%\usepackage[margin=3cm]{geometry} -\usepackage{a4wide} - -% ... -\usepackage[english]{babel} - -%\usepackage[latin1]{inputenc} -%\usepackage[T1]{fontenc} - -% Do not indent paragraphs, instead separate them via vertical spacing -\usepackage{parskip} - -% Support for graphics, provides \includegraphics -\usepackage{graphicx} -%\graphicspath{{images/}} % Specify subdir containing the images - -% Hyperref enriches the generated PDF with clickable links, -% and provides many other useful features. -\usepackage{nameref} -\usepackage[colorlinks]{hyperref} -\def\sectionautorefname{Section} % Write section with capital 'S' -\def\subsectionautorefname{Subsection} % Write subsection with capital 'S' - - -% The fancyvrb package provides the "Verbatim" environment, which, -% unlike the built-in "verbatim", allows embedding TeX commands, as -% well as tons of other neat stuff (line numbers, formatting adjustments, ...) -\usepackage{fancyvrb} -\fvset{tabsize=4,fontsize=\scriptsize,numbers=left} - -% Normally, one can not use the underscore character in LaTeX without -% escaping it (\_ instead of _). Since the Vorbis specs use it a lot, -% we use the underscore package to change this default behavior. -\usepackage[nohyphen]{underscore} - -% In LaTeX, pictures are normally put into floating environments, and it is -% left to the typesetting engine to place them in the "optimal" spot. These -% docs however expect pictures to be placed in a *specific* position. So we -% don't use \begin{figure}...\end{figure}, but rather a center environment. -% To still be able to use captions, we use the capt-of package. -\usepackage{capt-of} - - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% Custom commands -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -% Custom ref command, using hyperrefs autoref & nameref, to simulate the -% behavior of DocBook's ''. -\newcommand{\xref}[1]{\autoref{#1}, ``\nameref{#1}''} - -% Emulat DocBook's ''. -\newcommand{\link}[2]{\hyperref[#1]{#2}} - -% Simple 'Note' environment. Can be customized later on. -\newenvironment{note}{\subparagraph*{Note:}}{} - -% Map DocBook's to fancyvrb's Verbatim environment -\let\programlisting\Verbatim -\let\endprogramlisting\endVerbatim - -% Fake some more DocBook elements -\newcommand{\function}[1]{\texttt{#1}} -\newcommand{\filename}[1]{\texttt{#1}} -\newcommand{\varname}[1]{\texttt{#1}} -\newcommand{\literal}[1]{\texttt{#1}} - -% Redefine \~ to generate something that looks more appropriate when used in text. -\renewcommand{\~}{$\sim$} - -% Useful helper macro that inserts TODO comments very visibly into the generated -% file. Helps you to not forget to resolve those TODOs... :) -\newcommand{\TODO}[1]{\textcolor{red}{*** #1 ***}} - -% Configure graphics formats: Prefer PDF, fall back to PNG or JPG, as available. -\DeclareGraphicsExtensions{.pdf,.png,.jpg,.jpeg} - - -% NOTE: Things to watch out for: Some chars are reserved in LaTeX. You need to translate them... -% ~ -> $\sim$ (or \~ which we defined above) -% % -> \% -% & -> \& -% < -> $<$ -% > -> $>$ -% and others. Refer to any of the many LaTeX refs out there if in doubt! - -\begin{document} - - -\title{Vorbis I specification} -\author{Xiph.org Foundation} -\maketitle - -\tableofcontents - -\include{01-introduction} -\include{02-bitpacking} -\include{03-codebook} -\include{04-codec} -\include{05-comment} -\include{06-floor0} -\include{07-floor1} -\include{08-residue} -\include{09-helper} -\include{10-tables} - -\appendix -\include{a1-encapsulation-ogg} -\include{a2-encapsulation-rtp} - -\include{footer} - - -% TODO: Use a bibliography, as in the example below? -\begin{thebibliography}{99} - -\bibitem{Sporer/Brandenburg/Edler} T.~Sporer, K.~Brandenburg and B.~Edler, -The use of multirate filter banks for coding of high quality digital audio, -\url{http://www.iocon.com/resource/docs/ps/eusipco_corrected.ps}. - - -\end{thebibliography} - -\end{document} diff --git a/ExternalLibs/libvorbis-1.3.1/doc/a1-encapsulation-ogg.tex b/ExternalLibs/libvorbis-1.3.1/doc/a1-encapsulation-ogg.tex deleted file mode 100644 index 47355f6..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/a1-encapsulation-ogg.tex +++ /dev/null @@ -1,185 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Embedding Vorbis into an Ogg stream} \label{vorbis:over:ogg} - -\subsection{Overview} - -This document describes using Ogg logical and physical transport -streams to encapsulate Vorbis compressed audio packet data into file -form. - -The \xref{vorbis:spec:intro} provides an overview of the construction -of Vorbis audio packets. - -The \href{oggstream.html}{Ogg -bitstream overview} and \href{framing.html}{Ogg logical -bitstream and framing spec} provide detailed descriptions of Ogg -transport streams. This specification document assumes a working -knowledge of the concepts covered in these named backround -documents. Please read them first. - -\subsubsection{Restrictions} - -The Ogg/Vorbis I specification currently dictates that Ogg/Vorbis -streams use Ogg transport streams in degenerate, unmultiplexed -form only. That is: - -\begin{itemize} - \item - A meta-headerless Ogg file encapsulates the Vorbis I packets - - \item - The Ogg stream may be chained, i.e., contain multiple, contigous logical streams (links). - - \item - The Ogg stream must be unmultiplexed (only one stream, a Vorbis audio stream, per link) - -\end{itemize} - - -This is not to say that it is not currently possible to multiplex -Vorbis with other media types into a multi-stream Ogg file. At the -time this document was written, Ogg was becoming a popular container -for low-bitrate movies consisting of DivX video and Vorbis audio. -However, a 'Vorbis I audio file' is taken to imply Vorbis audio -existing alone within a degenerate Ogg stream. A compliant 'Vorbis -audio player' is not required to implement Ogg support beyond the -specific support of Vorbis within a degenrate Ogg stream (naturally, -application authors are encouraged to support full multiplexed Ogg -handling). - - - - -\subsubsection{MIME type} - -The MIME type of Ogg files depend on the context. Specifically, complex -multimedia and applications should use \literal{application/ogg}, -while visual media should use \literal{video/ogg}, and audio -\literal{audio/ogg}. Vorbis data encapsulated in Ogg may appear -in any of those types. RTP encapsulated Vorbis should use -\literal{audio/vorbis} + \literal{audio/vorbis-config}. - - -\subsection{Encapsulation} - -Ogg encapsulation of a Vorbis packet stream is straightforward. - -\begin{itemize} - -\item - The first Vorbis packet (the identification header), which - uniquely identifies a stream as Vorbis audio, is placed alone in the - first page of the logical Ogg stream. This results in a first Ogg - page of exactly 58 bytes at the very beginning of the logical stream. - - -\item - This first page is marked 'beginning of stream' in the page flags. - - -\item - The second and third vorbis packets (comment and setup - headers) may span one or more pages beginning on the second page of - the logical stream. However many pages they span, the third header - packet finishes the page on which it ends. The next (first audio) packet - must begin on a fresh page. - - -\item - The granule position of these first pages containing only headers is zero. - - -\item - The first audio packet of the logical stream begins a fresh Ogg page. - - -\item - Packets are placed into ogg pages in order until the end of stream. - - -\item - The last page is marked 'end of stream' in the page flags. - - -\item - Vorbis packets may span page boundaries. - - -\item - The granule position of pages containing Vorbis audio is in units - of PCM audio samples (per channel; a stereo stream's granule position - does not increment at twice the speed of a mono stream). - - -\item - The granule position of a page represents the end PCM sample - position of the last packet \emph{completed} on that - page. The 'last PCM sample' is the last complete sample returned by - decode, not an internal sample awaiting lapping with a - subsequent block. A page that is entirely spanned by a single - packet (that completes on a subsequent page) has no granule - position, and the granule position is set to '-1'. - - - Note that the last decoded (fully lapped) PCM sample from a packet - is not necessarily the middle sample from that block. If, eg, the - current Vorbis packet encodes a "long block" and the next Vorbis - packet encodes a "short block", the last decodable sample from the - current packet be at position (3*long\_block\_length/4) - - (short\_block\_length/4). - - -\item - The granule (PCM) position of the first page need not indicate - that the stream started at position zero. Although the granule - position belongs to the last completed packet on the page and a - valid granule position must be positive, by - inference it may indicate that the PCM position of the beginning - of audio is positive or negative. - - - \begin{itemize} - \item - A positive starting value simply indicates that this stream begins at - some positive time offset, potentially within a larger - program. This is a common case when connecting to the middle - of broadcast stream. - - \item - A negative value indicates that - output samples preceeding time zero should be discarded during - decoding; this technique is used to allow sample-granularity - editing of the stream start time of already-encoded Vorbis - streams. The number of samples to be discarded must not exceed - the overlap-add span of the first two audio packets. - - \end{itemize} - - - In both of these cases in which the initial audio PCM starting - offset is nonzero, the second finished audio packet must flush the - page on which it appears and the third packet begin a fresh page. - This allows the decoder to always be able to perform PCM position - adjustments before needing to return any PCM data from synthesis, - resulting in correct positioning information without any aditional - seeking logic. - - - \begin{note} - Failure to do so should, at worst, cause a - decoder implementation to return incorrect positioning information - for seeking operations at the very beginning of the stream. - \end{note} - - -\item - A granule position on the final page in a stream that indicates - less audio data than the final packet would normally return is used to - end the stream on other than even frame boundaries. The difference - between the actual available data returned and the declared amount - indicates how many trailing samples to discard from the decoding - process. - -\end{itemize} diff --git a/ExternalLibs/libvorbis-1.3.1/doc/a2-encapsulation-rtp.tex b/ExternalLibs/libvorbis-1.3.1/doc/a2-encapsulation-rtp.tex deleted file mode 100644 index 0678037..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/a2-encapsulation-rtp.tex +++ /dev/null @@ -1,9 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section{Vorbis encapsulation in RTP} \label{vorbis:over:rtp} - -% TODO: Include draft-rtp.xml somehow? - -Please consult RFC 5215 \textit{``RTP Payload Format for Vorbis Encoded - Audio''} for description of how to embed Vorbis audio in an RTP stream. diff --git a/ExternalLibs/libvorbis-1.3.1/doc/components.png b/ExternalLibs/libvorbis-1.3.1/doc/components.png deleted file mode 100644 index 0c4e75c..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/components.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/eightphase.png b/ExternalLibs/libvorbis-1.3.1/doc/eightphase.png deleted file mode 100644 index 8272e44..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/eightphase.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/evenlsp.png b/ExternalLibs/libvorbis-1.3.1/doc/evenlsp.png deleted file mode 100644 index 4d4fee4..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/evenlsp.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/fish_xiph_org.png b/ExternalLibs/libvorbis-1.3.1/doc/fish_xiph_org.png deleted file mode 100644 index dc64a03..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/fish_xiph_org.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floor1-1.png b/ExternalLibs/libvorbis-1.3.1/doc/floor1-1.png deleted file mode 100644 index bd7faba..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/floor1-1.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floor1-2.png b/ExternalLibs/libvorbis-1.3.1/doc/floor1-2.png deleted file mode 100644 index 46f0ac2..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/floor1-2.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floor1-3.png b/ExternalLibs/libvorbis-1.3.1/doc/floor1-3.png deleted file mode 100644 index 4d03c6a..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/floor1-3.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floor1-4.png b/ExternalLibs/libvorbis-1.3.1/doc/floor1-4.png deleted file mode 100644 index f96e77d..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/floor1-4.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floor1_inverse_dB_table.html b/ExternalLibs/libvorbis-1.3.1/doc/floor1_inverse_dB_table.html deleted file mode 100644 index 52d15e8..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/floor1_inverse_dB_table.html +++ /dev/null @@ -1,154 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis I format specification: floor1_inverse_dB_table

    - -

    The vector [floor1_inverse_dB_table] is a 256 element static -lookup table consiting of the following values (read left to right -then top to bottom):

    - -
    -  1.0649863e-07, 1.1341951e-07, 1.2079015e-07, 1.2863978e-07, 
-  1.3699951e-07, 1.4590251e-07, 1.5538408e-07, 1.6548181e-07, 
-  1.7623575e-07, 1.8768855e-07, 1.9988561e-07, 2.1287530e-07, 
-  2.2670913e-07, 2.4144197e-07, 2.5713223e-07, 2.7384213e-07, 
-  2.9163793e-07, 3.1059021e-07, 3.3077411e-07, 3.5226968e-07, 
-  3.7516214e-07, 3.9954229e-07, 4.2550680e-07, 4.5315863e-07, 
-  4.8260743e-07, 5.1396998e-07, 5.4737065e-07, 5.8294187e-07, 
-  6.2082472e-07, 6.6116941e-07, 7.0413592e-07, 7.4989464e-07, 
-  7.9862701e-07, 8.5052630e-07, 9.0579828e-07, 9.6466216e-07, 
-  1.0273513e-06, 1.0941144e-06, 1.1652161e-06, 1.2409384e-06, 
-  1.3215816e-06, 1.4074654e-06, 1.4989305e-06, 1.5963394e-06, 
-  1.7000785e-06, 1.8105592e-06, 1.9282195e-06, 2.0535261e-06, 
-  2.1869758e-06, 2.3290978e-06, 2.4804557e-06, 2.6416497e-06, 
-  2.8133190e-06, 2.9961443e-06, 3.1908506e-06, 3.3982101e-06, 
-  3.6190449e-06, 3.8542308e-06, 4.1047004e-06, 4.3714470e-06, 
-  4.6555282e-06, 4.9580707e-06, 5.2802740e-06, 5.6234160e-06, 
-  5.9888572e-06, 6.3780469e-06, 6.7925283e-06, 7.2339451e-06, 
-  7.7040476e-06, 8.2047000e-06, 8.7378876e-06, 9.3057248e-06, 
-  9.9104632e-06, 1.0554501e-05, 1.1240392e-05, 1.1970856e-05, 
-  1.2748789e-05, 1.3577278e-05, 1.4459606e-05, 1.5399272e-05, 
-  1.6400004e-05, 1.7465768e-05, 1.8600792e-05, 1.9809576e-05, 
-  2.1096914e-05, 2.2467911e-05, 2.3928002e-05, 2.5482978e-05, 
-  2.7139006e-05, 2.8902651e-05, 3.0780908e-05, 3.2781225e-05, 
-  3.4911534e-05, 3.7180282e-05, 3.9596466e-05, 4.2169667e-05, 
-  4.4910090e-05, 4.7828601e-05, 5.0936773e-05, 5.4246931e-05, 
-  5.7772202e-05, 6.1526565e-05, 6.5524908e-05, 6.9783085e-05, 
-  7.4317983e-05, 7.9147585e-05, 8.4291040e-05, 8.9768747e-05, 
-  9.5602426e-05, 0.00010181521, 0.00010843174, 0.00011547824, 
-  0.00012298267, 0.00013097477, 0.00013948625, 0.00014855085, 
-  0.00015820453, 0.00016848555, 0.00017943469, 0.00019109536, 
-  0.00020351382, 0.00021673929, 0.00023082423, 0.00024582449, 
-  0.00026179955, 0.00027881276, 0.00029693158, 0.00031622787, 
-  0.00033677814, 0.00035866388, 0.00038197188, 0.00040679456, 
-  0.00043323036, 0.00046138411, 0.00049136745, 0.00052329927, 
-  0.00055730621, 0.00059352311, 0.00063209358, 0.00067317058, 
-  0.00071691700, 0.00076350630, 0.00081312324, 0.00086596457, 
-  0.00092223983, 0.00098217216, 0.0010459992,  0.0011139742, 
-  0.0011863665,  0.0012634633,  0.0013455702,  0.0014330129, 
-  0.0015261382,  0.0016253153,  0.0017309374,  0.0018434235, 
-  0.0019632195,  0.0020908006,  0.0022266726,  0.0023713743, 
-  0.0025254795,  0.0026895994,  0.0028643847,  0.0030505286, 
-  0.0032487691,  0.0034598925,  0.0036847358,  0.0039241906, 
-  0.0041792066,  0.0044507950,  0.0047400328,  0.0050480668, 
-  0.0053761186,  0.0057254891,  0.0060975636,  0.0064938176, 
-  0.0069158225,  0.0073652516,  0.0078438871,  0.0083536271, 
-  0.0088964928,  0.009474637,   0.010090352,   0.010746080, 
-  0.011444421,   0.012188144,   0.012980198,   0.013823725, 
-  0.014722068,   0.015678791,   0.016697687,   0.017782797, 
-  0.018938423,   0.020169149,   0.021479854,   0.022875735, 
-  0.024362330,   0.025945531,   0.027631618,   0.029427276, 
-  0.031339626,   0.033376252,   0.035545228,   0.037855157, 
-  0.040315199,   0.042935108,   0.045725273,   0.048696758, 
-  0.051861348,   0.055231591,   0.058820850,   0.062643361, 
-  0.066714279,   0.071049749,   0.075666962,   0.080584227, 
-  0.085821044,   0.091398179,   0.097337747,   0.10366330, 
-  0.11039993,    0.11757434,    0.12521498,    0.13335215, 
-  0.14201813,    0.15124727,    0.16107617,    0.17154380, 
-  0.18269168,    0.19456402,    0.20720788,    0.22067342, 
-  0.23501402,    0.25028656,    0.26655159,    0.28387361, 
-  0.30232132,    0.32196786,    0.34289114,    0.36517414, 
-  0.38890521,    0.41417847,    0.44109412,    0.46975890, 
-  0.50028648,    0.53279791,    0.56742212,    0.60429640, 
-  0.64356699,    0.68538959,    0.72993007,    0.77736504, 
-  0.82788260,    0.88168307,    0.9389798,     1.
-
    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/floorval.png b/ExternalLibs/libvorbis-1.3.1/doc/floorval.png deleted file mode 100644 index 49d6ec1..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/floorval.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/footer.tex b/ExternalLibs/libvorbis-1.3.1/doc/footer.tex deleted file mode 100644 index df5a289..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/footer.tex +++ /dev/null @@ -1,33 +0,0 @@ -% -*- mode: latex; TeX-master: "Vorbis_I_spec"; -*- -%!TEX root = Vorbis_I_spec.tex -% $Id$ -\section*{Colophon} - -\includegraphics{xifish} \label{footer} -%\TODO{display xifish.pdf, [Xiph.org logo]} - - -Ogg is a \href{http://www.xiph.org/}{Xiph.org Foundation} effort -to protect essential tenets of Internet multimedia from corporate -hostage-taking; Open Source is the net's greatest tool to keep -everyone honest. See \href{http://www.xiph.org/about.html}{About -the Xiph.org Foundation} for details. - - -Ogg Vorbis is the first Ogg audio CODEC. Anyone may freely use and -distribute the Ogg and Vorbis specification, whether in a private, -public or corporate capacity. However, the Xiph.org Foundation and -the Ogg project (xiph.org) reserve the right to set the Ogg Vorbis -specification and certify specification compliance. - -Xiph.org's Vorbis software CODEC implementation is distributed under a -BSD-like license. This does not restrict third parties from -distributing independent implementations of Vorbis software under -other licenses. - -Ogg, Vorbis, Xiph.org Foundation and their logos are trademarks (tm) -of the \href{http://www.xiph.org/}{Xiph.org Foundation}. These -pages are copyright (C) 1994-2007 Xiph.org Foundation. All rights -reserved. - -This document is set using \LaTeX. \ No newline at end of file diff --git a/ExternalLibs/libvorbis-1.3.1/doc/fourphase.png b/ExternalLibs/libvorbis-1.3.1/doc/fourphase.png deleted file mode 100644 index a86e128..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/fourphase.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/framing.html b/ExternalLibs/libvorbis-1.3.1/doc/framing.html deleted file mode 100644 index 22b3838..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/framing.html +++ /dev/null @@ -1,431 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg logical bitstream framing

    - -

    Ogg bitstreams

    - -

    The Ogg transport bitstream is designed to provide framing, error -protection and seeking structure for higher-level codec streams that -consist of raw, unencapsulated data packets, such as the Vorbis audio -codec or Theora video codec.

    - -

    Application example: Vorbis

    - -

    Vorbis encodes short-time blocks of PCM data into raw packets of -bit-packed data. These raw packets may be used directly by transport -mechanisms that provide their own framing and packet-separation -mechanisms (such as UDP datagrams). For stream based storage (such as -files) and transport (such as TCP streams or pipes), Vorbis uses the -Ogg bitstream format to provide framing/sync, sync recapture -after error, landmarks during seeking, and enough information to -properly separate data back into packets at the original packet -boundaries without relying on decoding to find packet boundaries.

    - -

    Design constraints for Ogg bitstreams

    - -
      -
    1. True streaming; we must not need to seek to build a 100% - complete bitstream.
      2. -
    2. Use no more than approximately 1-2% of bitstream bandwidth for - packet boundary marking, high-level framing, sync and seeking.
      3. -
    3. Specification of absolute position within the original sample - stream.
      4. -
    4. Simple mechanism to ease limited editing, such as a simplified - concatenation mechanism.
      5. -
    5. Detection of corruption, recapture after error and direct, random - access to data at arbitrary positions in the bitstream.
      6. -
    - -

    Logical and Physical Bitstreams

    - -

    A logical Ogg bitstream is a contiguous stream of -sequential pages belonging only to the logical bitstream. A -physical Ogg bitstream is constructed from one or more -than one logical Ogg bitstream (the simplest physical bitstream -is simply a single logical bitstream). We describe below the exact -formatting of an Ogg logical bitstream. Combining logical -bitstreams into more complex physical bitstreams is described in the -Ogg bitstream overview. The exact -mapping of raw Vorbis packets into a valid Ogg Vorbis physical -bitstream is described in the Vorbis I Specification.

    - -

    Bitstream structure

    - -

    An Ogg stream is structured by dividing incoming packets into -segments of up to 255 bytes and then wrapping a group of contiguous -packet segments into a variable length page preceded by a page -header. Both the header size and page size are variable; the page -header contains sizing information and checksum data to determine -header/page size and data integrity.

    - -

    The bitstream is captured (or recaptured) by looking for the beginning -of a page, specifically the capture pattern. Once the capture pattern -is found, the decoder verifies page sync and integrity by computing -and comparing the checksum. At that point, the decoder can extract the -packets themselves.

    - -

    Packet segmentation

    - -

    Packets are logically divided into multiple segments before encoding -into a page. Note that the segmentation and fragmentation process is a -logical one; it's used to compute page header values and the original -page data need not be disturbed, even when a packet spans page -boundaries.

    - -

    The raw packet is logically divided into [n] 255 byte segments and a -last fractional segment of < 255 bytes. A packet size may well -consist only of the trailing fractional segment, and a fractional -segment may be zero length. These values, called "lacing values" are -then saved and placed into the header segment table.

    - -

    An example should make the basic concept clear:

    - -
    -
-raw packet:
-  ___________________________________________
- |______________packet data__________________| 753 bytes
-
-lacing values for page header segment table: 255,255,243
-
-
    - -

    We simply add the lacing values for the total size; the last lacing -value for a packet is always the value that is less than 255. Note -that this encoding both avoids imposing a maximum packet size as well -as imposing minimum overhead on small packets (as opposed to, eg, -simply using two bytes at the head of every packet and having a max -packet size of 32k. Small packets (<255, the typical case) are -penalized with twice the segmentation overhead). Using the lacing -values as suggested, small packets see the minimum possible -byte-aligned overheade (1 byte) and large packets, over 512 bytes or -so, see a fairly constant ~.5% overhead on encoding space.

    - -

    Note that a lacing value of 255 implies that a second lacing value -follows in the packet, and a value of < 255 marks the end of the -packet after that many additional bytes. A packet of 255 bytes (or a -multiple of 255 bytes) is terminated by a lacing value of 0:

    - -
    
-raw packet:
-  _______________________________
- |________packet data____________|          255 bytes
-
-lacing values: 255, 0
-
    - -

    Note also that a 'nil' (zero length) packet is not an error; it -consists of nothing more than a lacing value of zero in the header.

    - -

    Packets spanning pages

    - -

    Packets are not restricted to beginning and ending within a page, -although individual segments are, by definition, required to do so. -Packets are not restricted to a maximum size, although excessively -large packets in the data stream are discouraged; the Ogg -bitstream specification strongly recommends nominal page size of -approximately 4-8kB (large packets are foreseen as being useful for -initialization data at the beginning of a logical bitstream).

    - -

    After segmenting a packet, the encoder may decide not to place all the -resulting segments into the current page; to do so, the encoder places -the lacing values of the segments it wishes to belong to the current -page into the current segment table, then finishes the page. The next -page is begun with the first value in the segment table belonging to -the next packet segment, thus continuing the packet (data in the -packet body must also correspond properly to the lacing values in the -spanned pages. The segment data in the first packet corresponding to -the lacing values of the first page belong in that page; packet -segments listed in the segment table of the following page must begin -the page body of the subsequent page).

    - -

    The last mechanic to spanning a page boundary is to set the header -flag in the new page to indicate that the first lacing value in the -segment table continues rather than begins a packet; a header flag of -0x01 is set to indicate a continued packet. Although mandatory, it -is not actually algorithmically necessary; one could inspect the -preceding segment table to determine if the packet is new or -continued. Adding the information to the packet_header flag allows a -simpler design (with no overhead) that needs only inspect the current -page header after frame capture. This also allows faster error -recovery in the event that the packet originates in a corrupt -preceding page, implying that the previous page's segment table -cannot be trusted.

    - -

    Note that a packet can span an arbitrary number of pages; the above -spanning process is repeated for each spanned page boundary. Also a -'zero termination' on a packet size that is an even multiple of 255 -must appear even if the lacing value appears in the next page as a -zero-length continuation of the current packet. The header flag -should be set to 0x01 to indicate that the packet spanned, even though -the span is a nil case as far as data is concerned.

    - -

    The encoding looks odd, but is properly optimized for speed and the -expected case of the majority of packets being between 50 and 200 -bytes (note that it is designed such that packets of wildly different -sizes can be handled within the model; placing packet size -restrictions on the encoder would have only slightly simplified design -in page generation and increased overall encoder complexity).

    - -

    The main point behind tracking individual packets (and packet -segments) is to allow more flexible encoding tricks that requiring -explicit knowledge of packet size. An example is simple bandwidth -limiting, implemented by simply truncating packets in the nominal case -if the packet is arranged so that the least sensitive portion of the -data comes last.

    - -

    Page header

    - -

    The headering mechanism is designed to avoid copying and re-assembly -of the packet data (ie, making the packet segmentation process a -logical one); the header can be generated directly from incoming -packet data. The encoder buffers packet data until it finishes a -complete page at which point it writes the header followed by the -buffered packet segments.

    - -

    capture_pattern

    - -

    A header begins with a capture pattern that simplifies identifying -pages; once the decoder has found the capture pattern it can do a more -intensive job of verifying that it has in fact found a page boundary -(as opposed to an inadvertent coincidence in the byte stream).

    - -
    
- byte value
-
-  0  0x4f 'O'
-  1  0x67 'g'
-  2  0x67 'g'
-  3  0x53 'S'  
-
    - -

    stream_structure_version

    - -

    The capture pattern is followed by the stream structure revision:

    - -
    
- byte value
-
-  4  0x00
-
    - -

    header_type_flag

    - -

    The header type flag identifies this page's context in the bitstream:

    - -
    
- byte value
-
-  5  bitflags: 0x01: unset = fresh packet
-	               set = continued packet
-	       0x02: unset = not first page of logical bitstream
-                       set = first page of logical bitstream (bos)
-	       0x04: unset = not last page of logical bitstream
-                       set = last page of logical bitstream (eos)
-
    - -

    absolute granule position

    - -

    (This is packed in the same way the rest of Ogg data is packed; LSb -of LSB first. Note that the 'position' data specifies a 'sample' -number (eg, in a CD quality sample is four octets, 16 bits for left -and 16 bits for right; in video it would likely be the frame number. -It is up to the specific codec in use to define the semantic meaning -of the granule position value). The position specified is the total -samples encoded after including all packets finished on this page -(packets begun on this page but continuing on to the next page do not -count). The rationale here is that the position specified in the -frame header of the last page tells how long the data coded by the -bitstream is. A truncated stream will still return the proper number -of samples that can be decoded fully.

    - -

    A special value of '-1' (in two's complement) indicates that no packets -finish on this page.

    - -
    
- byte value
-
-  6  0xXX LSB
-  7  0xXX
-  8  0xXX
-  9  0xXX
- 10  0xXX
- 11  0xXX
- 12  0xXX
- 13  0xXX MSB
-
    - -

    stream serial number

    - -

    Ogg allows for separate logical bitstreams to be mixed at page -granularity in a physical bitstream. The most common case would be -sequential arrangement, but it is possible to interleave pages for -two separate bitstreams to be decoded concurrently. The serial -number is the means by which pages physical pages are associated with -a particular logical stream. Each logical stream must have a unique -serial number within a physical stream:

    - -
    
- byte value
-
- 14  0xXX LSB
- 15  0xXX
- 16  0xXX
- 17  0xXX MSB
-
    - -

    page sequence no

    - -

    Page counter; lets us know if a page is lost (useful where packets -span page boundaries).

    - -
    
- byte value
-
- 18  0xXX LSB
- 19  0xXX
- 20  0xXX
- 21  0xXX MSB
-
    - -

    page checksum

    - -

    32 bit CRC value (direct algorithm, initial val and final XOR = 0, -generator polynomial=0x04c11db7). The value is computed over the -entire header (with the CRC field in the header set to zero) and then -continued over the page. The CRC field is then filled with the -computed value.

    - -

    (A thorough discussion of CRC algorithms can be found in "A -Painless Guide to CRC Error Detection Algorithms" by Ross -Williams ross@ross.net.)

    - -
    
- byte value
-
- 22  0xXX LSB
- 23  0xXX
- 24  0xXX
- 25  0xXX MSB
-
    - -

    page_segments

    - -

    The number of segment entries to appear in the segment table. The -maximum number of 255 segments (255 bytes each) sets the maximum -possible physical page size at 65307 bytes or just under 64kB (thus -we know that a header corrupted so as destroy sizing/alignment -information will not cause a runaway bitstream. We'll read in the -page according to the corrupted size information that's guaranteed to -be a reasonable size regardless, notice the checksum mismatch, drop -sync and then look for recapture).

    - -
    
- byte value
-
- 26 0x00-0xff (0-255)
-
    - -

    segment_table (containing packet lacing values)

    - -

    The lacing values for each packet segment physically appearing in -this page are listed in contiguous order.

    - -
    
- byte value
-
- 27 0x00-0xff (0-255)
- [...]
- n  0x00-0xff (0-255, n=page_segments+26)
-
    - -

    Total page size is calculated directly from the known header size and -lacing values in the segment table. Packet data segments follow -immediately after the header.

    - -

    Page headers typically impose a flat .25-.5% space overhead assuming -nominal ~8k page sizes. The segmentation table needed for exact -packet recovery in the streaming layer adds approximately .5-1% -nominal assuming expected encoder behavior in the 44.1kHz, 128kbps -stereo encodings.

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/helper.html b/ExternalLibs/libvorbis-1.3.1/doc/helper.html deleted file mode 100644 index f8ff0c7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/helper.html +++ /dev/null @@ -1,239 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis I format specification: helper equations

    - -

    Overview

    - -

    The equations below are used in multiple places by the Vorbis codec -specification. Rather than cluttering up the main specification -documents, they are defined here and linked in the main documents -where appropriate.

    - -

    ilog

    - -

    The "ilog(x)" function returns the position number (1 through n) of the -highest set bit in the two's complement integer value -[x]. Values of [x] less than zero are defined to return zero.

    - -
    -  1) [return_value] = 0;
-  2) if ( [x] is greater than zero ){
-      
-       3) increment [return_value];
-       4) logical shift [x] one bit to the right, padding the MSb with zero
-       5) repeat at step 2)
-
-     }
-
-   6) done
-
    - -

    Examples:

    - -
      -
    • ilog(0) = 0;
      • -
    • ilog(1) = 1;
      • -
    • ilog(2) = 2;
      • -
    • ilog(3) = 2;
      • -
    • ilog(4) = 3;
      • -
    • ilog(7) = 3;
      • -
    • ilog(negative number) = 0;
      • -
    - -

    float32_unpack

    - -

    "float32_unpack(x)" is intended to translate the packed binary -representation of a Vorbis codebook float value into the -representation used by the decoder for floating point numbers. For -purposes of this example, we will unpack a Vorbis float32 into a -host-native floating point number.

    - -
    -  1) [mantissa] = [x] bitwise AND 0x1fffff (unsigned result)
-  2) [sign] = [x] bitwise AND 0x80000000 (unsigned result)
-  3) [exponent] = ( [x] bitwise AND 0x7fe00000) shifted right 21 bits (unsigned result)
-  4) if ( [sign] is nonzero ) then negate [mantissa]
-  5) return [mantissa] * ( 2 ^ ( [exponent] - 788 ) )
-
    - -

    lookup1_values

    - -

    "lookup1_values(codebook_entries,codebook_dimensions)" is used to -compute the correct length of the value index for a codebook VQ lookup -table of lookup type 1. The values on this list are permuted to -construct the VQ vector lookup table of size -[codebook_entries].

    - -

    The return value for this function is defined to be 'the greatest -integer value for which [return_value] to the power of -[codebook_dimensions] is less than or equal to -[codebook_entries]'.

    - -

    low_neighbor

    - -

    "low_neighbor(v,x)" finds the position n in vector [v] of -the greatest value scalar element for which n is less than -[x] and vector [v] element n is less -than vector [v] element [x].

    - -

    high_neighbor

    - -

    "high_neighbor(v,x)" finds the position n in vector [v] of -the lowest value scalar element for which n is less than -[x] and vector [v] element n is greater -than vector [v] element [x].

    - -

    render_point

    - -

    "render_point(x0,y0,x1,y1,X)" is used to find the Y value at point X -along the line specified by x0, x1, y0 and y1. This function uses an -integer algorithm to solve for the point directly without calculating -intervening values along the line.

    - -
    -  1)  [dy] = [y1] - [y0]
-  2) [adx] = [x1] - [x0]
-  3) [ady] = absolute value of [dy]
-  4) [err] = [ady] * ([X] - [x0])
-  5) [off] = [err] / [adx] using integer division
-  6) if ( [dy] is less than zero ) {
-
-       7) [Y] = [y0] - [off]
-
-     } else {
-
-       8) [Y] = [y0] + [off]
-  
-     }
-
-  9) done
-
    - -

    render_line

    - -

    Floor decode type one uses the integer line drawing algorithm of -"render_line(x0, y0, x1, y1, v)" to construct an integer floor -curve for contiguous piecewise line segments. Note that it has not -been relevant elsewhere, but here we must define integer division as -rounding division of both positive and negative numbers toward zero.

    - -
    -  1)   [dy] = [y1] - [y0]
-  2)  [adx] = [x1] - [x0]
-  3)  [ady] = absolute value of [dy]
-  4) [base] = [dy] / [adx] using integer division
-  5)    [x] = [x0]
-  6)    [y] = [y0]
-  7)  [err] = 0
-
-  8) if ( [dy] is less than 0 ) {
-
-        9) [sy] = [base] - 1
-
-     } else {
-
-       10) [sy] = [base] + 1
-
-     }
-
- 11) [ady] = [ady] - (absolute value of [base]) * [adx]
- 12) vector [v] element [x] = [y]
-
- 13) iterate [x] over the range [x0]+1 ... [x1]-1 {
-
-       14) [err] = [err] + [ady];
-       15) if ( [err] >= [adx] ) {
-
-             15) [err] = [err] - [adx]
-             16)   [y] = [y] + [sy]
-
-           } else {
-
-             17) [y] = [y] + [base]
-   
-           }
-
-       18) vector [v] element [x] = [y]
-
-     }
-
    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/hufftree-under.png b/ExternalLibs/libvorbis-1.3.1/doc/hufftree-under.png deleted file mode 100644 index be6e8d6..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/hufftree-under.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/hufftree.png b/ExternalLibs/libvorbis-1.3.1/doc/hufftree.png deleted file mode 100644 index f4dc537..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/hufftree.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/index.html b/ExternalLibs/libvorbis-1.3.1/doc/index.html deleted file mode 100644 index bcf18c0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/index.html +++ /dev/null @@ -1,114 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis Documentation

    - -

    Vorbis technical discussion documents

    - - -

    Ogg Vorbis I specification

    - - - -

    Ogg Vorbis programming documents

    - - - -

    Ogg bitstream documentation

    - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/lspmap.png b/ExternalLibs/libvorbis-1.3.1/doc/lspmap.png deleted file mode 100644 index 463b702..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/lspmap.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/oddlsp.png b/ExternalLibs/libvorbis-1.3.1/doc/oddlsp.png deleted file mode 100644 index c754617..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/oddlsp.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/oggstream.html b/ExternalLibs/libvorbis-1.3.1/doc/oggstream.html deleted file mode 100644 index 0d12d36..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/oggstream.html +++ /dev/null @@ -1,234 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg logical and physical bitstream overview

    - -

    Ogg bitstreams

    - -

    Ogg codecs use octet vectors of raw, compressed data -(packets). These compressed packets do not have any -high-level structure or boundary information; strung together, they -appear to be streams of random bytes with no landmarks.

    - -

    Raw packets may be used directly by transport mechanisms that provide -their own framing and packet-separation mechanisms (such as UDP -datagrams). For stream based storage (such as files) and transport -(such as TCP streams or pipes), Vorbis and other future Ogg codecs use -the Ogg bitstream format to provide framing/sync, sync recapture -after error, landmarks during seeking, and enough information to -properly separate data back into packets at the original packet -boundaries without relying on decoding to find packet boundaries.

    - -

    Logical and physical bitstreams

    - -

    Raw packets are grouped and encoded into contiguous pages of -structured bitstream data called logical bitstreams. A -logical bitstream consists of pages, in order, belonging to a single -codec instance. Each page is a self contained entity (although it is -possible that a packet may be split and encoded across one or more -pages); that is, the page decode mechanism is designed to recognize, -verify and handle single pages at a time from the overall bitstream.

    - -

    Multiple logical bitstreams can be combined (with restrictions) into a -single physical bitstream. A physical bitstream consists of -multiple logical bitstreams multiplexed at the page level and may -include a 'meta-header' at the beginning of the multiplexed logical -stream that serves as identification magic. Whole pages are taken in -order from multiple logical bitstreams and combined into a single -physical stream of pages. The decoder reconstructs the original -logical bitstreams from the physical bitstream by taking the pages in -order from the physical bitstream and redirecting them into the -appropriate logical decoding entity. The simplest physical bitstream -is a single, unmultiplexed logical bitstream with no meta-header; this -is referred to as a 'degenerate stream'.

    - -

    Ogg Logical Bitstream Framing discusses -the page format of an Ogg bitstream, the packet coding process -and logical bitstreams in detail. The remainder of this document -specifies requirements for constructing finished, physical Ogg -bitstreams.

    - -

    Mapping Restrictions

    - -

    Logical bitstreams may not be mapped/multiplexed into physical -bitstreams without restriction. Here we discuss design restrictions -on Ogg physical bitstreams in general, mostly to introduce -design rationale. Each 'media' format defines its own (generally more -restrictive) mapping. An 'Ogg Vorbis Audio Bitstream', for example, has a -specific physical bitstream structure. -An 'Ogg A/V' bitstream (not currently specified) will also mandate a -specific, restricted physical bitstream format.

    - -

    additional end-to-end structure

    - -

    The framing specification defines -'beginning of stream' and 'end of stream' page markers via a header -flag (it is possible for a stream to consist of a single page). A -stream always consists of an integer number of pages, an easy -requirement given the variable size nature of pages.

    - -

    In addition to the header flag marking the first and last pages of a -logical bitstream, the first page of an Ogg bitstream obeys -additional restrictions. Each individual media mapping specifies its -own implementation details regarding these restrictions.

    - -

    The first page of a logical Ogg bitstream consists of a single, -small 'initial header' packet that includes sufficient information to -identify the exact CODEC type and media requirements of the logical -bitstream. The intent of this restriction is to simplify identifying -the bitstream type and content; for a given media type (or across all -Ogg media types) we can know that we only need a small, fixed -amount of data to uniquely identify the bitstream type.

    - -

    As an example, Ogg Vorbis places the name and revision of the Vorbis -CODEC, the audio rate and the audio quality into this initial header, -thus simplifying vastly the certain identification of an Ogg Vorbis -audio bitstream.

    - -

    sequential multiplexing (chaining)

    - -

    The simplest form of logical bitstream multiplexing is concatenation -(chaining). Complete logical bitstreams are strung -one-after-another in order. The bitstreams do not overlap; the final -page of a given logical bitstream is immediately followed by the -initial page of the next. Chaining is the only logical->physical -mapping allowed by Ogg Vorbis.

    - -

    Each chained logical bitstream must have a unique serial number within -the scope of the physical bitstream.

    - -

    concurrent multiplexing (grouping)

    - -

    Logical bitstreams may also be multiplexed 'in parallel' -(grouped). An example of grouping would be to allow -streaming of separate audio and video streams, using different codecs -and different logical bitstreams, in the same physical bitstream. -Whole pages from multiple logical bitstreams are mixed together.

    - -

    The initial pages of each logical bitstream must appear first; the -media mapping specifies the order of the initial pages. For example, -Ogg A/V will eventually specify an Ogg video bitstream with -audio. The mapping may specify that the physical bitstream must begin -with the initial page of a logical video bitstream, followed by the -initial page of an audio stream. Unlike initial pages, terminal pages -for the logical bitstreams need not all occur contiguously (although a -specific media mapping may require this; it is not mandated by the -generic Ogg stream spec). Terminal pages may be 'nil' pages, -that is, pages containing no content but simply a page header with -position information and the 'last page of bitstream' flag set in the -page header.

    - -

    Each grouped bitstream must have a unique serial number within the -scope of the physical bitstream.

    - -

    sequential and concurrent multiplexing

    - -

    Groups of concurrently multiplexed bitstreams may be chained -consecutively. Such a physical bitstream obeys all the rules of both -grouped and chained multiplexed streams; the groups, when unchained , -must stand on their own as a valid concurrently multiplexed -bitstream.

    - -

    multiplexing example

    - -

    Below, we present an example of a grouped and chained bitstream:

    - -

    stream

    - -

    In this example, we see pages from five total logical bitstreams -multiplexed into a physical bitstream. Note the following -characteristics:

    - -
      -
    1. Grouped bitstreams begin together; all of the initial pages -must appear before any data pages. When concurrently multiplexed -groups are chained, the new group does not begin until all the -bitstreams in the previous group have terminated.
      2. - -
    2. The pages of concurrently multiplexed bitstreams need not conform -to a regular order; the only requirement is that page n of a -logical bitstream follow page n-1 in the physical bitstream. -There are no restrictions on intervening pages belonging to other -logical bitstreams. (Tying page appearance to bitrate demands is one -logical strategy, ie, the page appears at the chronological point -where decode requires more information).
      3. -
    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/programming.html b/ExternalLibs/libvorbis-1.3.1/doc/programming.html deleted file mode 100644 index 000adce..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/programming.html +++ /dev/null @@ -1,554 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Programming with Xiph.org libvorbis

    - -

    Description

    - -

    Libvorbis is the Xiph.org Foundation's portable Ogg Vorbis CODEC -implemented as a programmatic library. Libvorbis provides primitives -to handle framing and manipulation of Ogg bitstreams (used by the -Vorbis for streaming), a full analysis (encoding) interface as well as -packet decoding and synthesis for playback.

    - -

    The libvorbis library does not provide any system interface; a -full-featured demonstration player included with the library -distribtion provides example code for a variety of system interfaces -as well as a working example of using libvorbis in production code.

    - -

    Encoding Overview

    - -

    Decoding Overview

    - -

    Decoding a bitstream with libvorbis follows roughly the following -steps:

    - -
      -
    1. Frame the incoming bitstream into pages
      2. -
    2. Sort the pages by logical bitstream and buffer then into logical streams
      3. -
    3. Decompose the logical streams into raw packets
      4. -
    4. Reconstruct segments of the original data from each packet
      5. -
    5. Glue the reconstructed segments back into a decoded stream
      6. -
    - -

    Framing

    - -

    An Ogg bitstream is logically arranged into pages, but to decode -the pages, we have to find them first. The raw bitstream is first fed -into an ogg_sync_state buffer using ogg_sync_buffer() -and ogg_sync_wrote(). After each block we submit to the sync -buffer, we should check to see if we can frame and extract a complete -page or pages using ogg_sync_pageout(). Extra pages are -buffered; allowing them to build up in the ogg_sync_state -buffer will eventually exhaust memory.

    - -

    The Ogg pages returned from ogg_sync_pageout need not be -decoded further to be used as landmarks in seeking; seeking can be -either a rough process of simply jumping to approximately intuited -portions of the bitstream, or it can be a precise bisection process -that captures pages and inspects data position. When seeking, -however, sequential multiplexing (chaining) must be accounted for; -beginning play in a new logical bitstream requires initializing a -synthesis engine with the headers from that bitstream. Vorbis -bitstreams do not make use of concurent multiplexing (grouping).

    - -

    Sorting

    - -

    The pages produced by ogg_sync_pageout are then sorted by -serial number to seperate logical bitstreams. Initialize logical -bitstream buffers (og_stream_state) using -ogg_stream_init(). Pages are submitted to the matching -logical bitstream buffer using ogg_stream_pagein; the serial -number of the page and the stream buffer must match, or the page will -be rejected. A page submitted out of sequence will simply be noted, -and in the course of outputting packets, the hole will be flagged -(ogg_sync_pageout and ogg_stream_packetout will -return a negative value at positions where they had to recapture the -stream).

    - -

    Extracting packets

    - -

    After submitting page[s] to a logical stream, read available packets -using ogg_stream_packetout.

    - -

    Decoding packets

    - -

    Reassembling data segments

    - -

    Ogg Bitstream Manipulation Structures

    - -

    Two of the Ogg bitstream data structures are intended to be -transparent to the developer; the fields should be used directly.

    - -

    ogg_packet

    - -
    -typedef struct {
-  unsigned char *packet;
-  long  bytes;
-  long  b_o_s;
-  long  e_o_s;
-
-  size64 granulepos;
-
-} ogg_packet;
-
    - -
    -
    packet:
    -
    a pointer to the byte data of the raw packet
    -
    bytes:
    -
    the size of the packet' raw data
    -
    b_o_s:
    -
    beginning of stream; nonzero if this is the first packet of - the logical bitstream
    -
    e_o_s:
    -
    end of stream; nonzero if this is the last packet of the - logical bitstream
    -
    granulepos:
    -
    the absolute position of this packet in the original - uncompressed data stream.
    -
    - -

    encoding notes

    - -

    The encoder is responsible for setting all of -the fields of the packet to appropriate values before submission to -ogg_stream_packetin(); however, it is noted that the value in -b_o_s is ignored; the first page produced from a given -ogg_stream_state structure will be stamped as the initial -page. e_o_s, however, must be set; this is the means by -which the stream encoding primitives handle end of stream and cleanup.

    - -

    decoding notes

    - -

    ogg_stream_packetout() sets the fields -to appropriate values. Note that granulepos will be >= 0 only in the -case that the given packet actually represents that position (ie, only -the last packet completed on any page will have a meaningful -granulepos). Intervening frames will see granulepos set -to -1.

    - -

    ogg_page

    - -
    -typedef struct {
-  unsigned char *header;
-  long header_len;
-  unsigned char *body;
-  long body_len;
-} ogg_page;
-
    - -
    -
    header:
    -
    pointer to the page header data
    -
    header_len:
    -
    length of the page header in bytes
    -
    body:
    -
    pointer to the page body
    -
    body_len:
    -
    length of the page body
    -
    - -

    Note that although the header and body pointers do -not necessarily point into a single contiguous page vector, the page -body must immediately follow the header in the bitstream.

    - -

    Ogg Bitstream Manipulation Functions

    - -

    -int ogg_page_bos(ogg_page *og); -

    - -

    Returns the 'beginning of stream' flag for the given Ogg page. The -beginning of stream flag is set on the initial page of a logical -bitstream.

    - -

    Zero indicates the flag is cleared (this is not the initial page of a -logical bitstream). Nonzero indicates the flag is set (this is the -initial page of a logical bitstream).

    - -

    -int ogg_page_continued(ogg_page *og); -

    - -

    Returns the 'packet continued' flag for the given Ogg page. The packet -continued flag indicates whether or not the body data of this page -begins with packet continued from a preceeding page.

    - -

    Zero (unset) indicates that the body data begins with a new packet. -Nonzero (set) indicates that the first packet data on the page is a -continuation from the preceeding page.

    - -

    -int ogg_page_eos(ogg_page *og); -

    - -

    Returns the 'end of stream' flag for a give Ogg page. The end of page -flag is set on the last (terminal) page of a logical bitstream.

    - -

    Zero (unset) indicates that this is not the last page of a logical -bitstream. Nonzero (set) indicates that this is the last page of a -logical bitstream and that no addiitonal pages belonging to this -bitstream may follow.

    - -

    -size64 ogg_page_granulepos(ogg_page *og); -

    - -

    Returns the position of this page as an absolute position within the -original uncompressed data. The position, as returned, is 'frames -encoded to date up to and including the last whole packet on this -page'. Partial packets begun on this page but continued to the -following page are not included. If no packet ends on this page, the -frame position value will be equal to the frame position value of the -preceeding page. If none of the original uncompressed data is yet -represented in the logical bitstream (for example, the first page of a -bitstream consists only of a header packet; this packet encodes only -metadata), the value shall be zero.

    - -

    The units of the framenumber are determined by media mapping. A -vorbis audio bitstream, for example, defines one frame to be the -channel values from a single sampling period (eg, a 16 bit stereo -bitstream consists of two samples of two bytes for a total of four -bytes, thus a frame would be four bytes). A video stream defines one -frame to be a single frame of video.

    - -

    -int ogg_page_pageno(ogg_page *og); -

    - -

    Returns the sequential page number of the given Ogg page. The first -page in a logical bitstream is numbered zero; following pages are -numbered in increasing monotonic order.

    - -

    -int ogg_page_serialno(ogg_page *og); -

    - -

    Returns the serial number of the given Ogg page. The serial number is -used as a handle to distinguish various logical bitstreams in a -physical Ogg bitstresm. Every logical bitstream within a -physical bitstream must use a unique (within the scope of the physical -bitstream) serial number, which is stamped on all bitstream pages.

    - -

    -int ogg_page_version(ogg_page *og); -

    - -

    Returns the revision of the Ogg bitstream structure of the given page. -Currently, the only permitted number is zero. Later revisions of the -bitstream spec will increment this version should any changes be -incompatable.

    - -

    -int ogg_stream_clear(ogg_stream_state *os); -

    - -

    Clears and deallocates the internal storage of the given Ogg stream. -After clearing, the stream structure is not initialized for use; -ogg_stream_init must be called to reinitialize for use. -Use ogg_stream_reset to reset the stream state -to a fresh, intiialized state.

    - -

    ogg_stream_clear does not call free() on the pointer -os, allowing use of this call on stream structures in static -or automatic storage. ogg_stream_destroyis a complimentary -function that frees the pointer as well.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -int ogg_stream_destroy(ogg_stream_state *os); -

    - -

    Clears and deallocates the internal storage of the given Ogg stream, -then frees the storage associated with the pointer os.

    - -

    ogg_stream_clear does not call free() on the pointer -os, allowing use of that call on stream structures in static -or automatic storage.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -int ogg_stream_init(ogg_stream_state *os,int serialno); -

    - -

    Initialize the storage associated with os for use as an Ogg -stream. This call is used to initialize a stream for both encode and -decode. The given serial number is the serial number that will be -stamped on pages of the produced bitstream (during encode), or used as -a check that pages match (during decode).

    - -

    Returns zero on success, nonzero on failure.

    - -

    -int ogg_stream_packetin(ogg_stream_state *os, ogg_packet *op); -

    - -

    Used during encoding to add the given raw packet to the given Ogg -bitstream. The contents of op are copied; -ogg_stream_packetin does not retain any pointers into -op's storage. The encoding proccess buffers incoming packets -until enough packets have been assembled to form an entire page; -ogg_stream_pageout is used to read complete pages.

    - -

    Returns zero on success, nonzero on failure.

    - -

    -int ogg_stream_packetout(ogg_stream_state *os,ogg_packet *op); -

    - -

    Used during decoding to read raw packets from the given logical -bitstream. ogg_stream_packetout will only return complete -packets for which checksumming indicates no corruption. The size and -contents of the packet exactly match those given in the encoding -process.

    - -

    Returns zero if the next packet is not ready to be read (not buffered -or incomplete), positive if it returned a complete packet in -op and negative if there is a gap, extra bytes or corruption -at this position in the bitstream (essentially that the bitstream had -to be recaptured). A negative value is not necessarily an error. It -would be a common occurence when seeking, for example, which requires -recapture of the bitstream at the position decoding continued.

    - -

    If the return value is positive, ogg_stream_packetout placed -a packet in op. The data in op points to static -storage that is valid until the next call to -ogg_stream_pagein, ogg_stream_clear, -ogg_stream_reset, or ogg_stream_destroy. The -pointers are not invalidated by more calls to -ogg_stream_packetout.

    - -

    -int ogg_stream_pagein(ogg_stream_state *os, ogg_page *og); -

    - -

    Used during decoding to buffer the given complete, pre-verified page -for decoding into raw Ogg packets. The given page must be framed, -normally produced by ogg_sync_pageout, and from the logical -bitstream associated with os (the serial numbers must match). -The contents of the given page are copied; ogg_stream_pagein -retains no pointers into og storage.

    - -

    Returns zero on success and non-zero on failure.

    - -

    -int ogg_stream_pageout(ogg_stream_state *os, ogg_page *og); -

    - -

    Used during encode to read complete pages from the stream buffer. The -returned page is ready for sending out to the real world.

    - -

    Returns zero if there is no complete page ready for reading. Returns -nonzero when it has placed data for a complete page into -og. Note that the storage returned in og points into internal -storage; the pointers in og are valid until the next call to -ogg_stream_pageout, ogg_stream_packetin, -ogg_stream_reset, ogg_stream_clear or -ogg_stream_destroy.

    - -

    -int ogg_stream_reset(ogg_stream_state *os); -

    - -

    Resets the given stream's state to that of a blank, unused stream; -this may be used during encode or decode.

    - -

    Note that if used during encode, it does not alter the stream's serial -number. In addition, the next page produced during encoding will be -marked as the 'initial' page of the logical bitstream.

    - -

    When used during decode, this simply clears the data buffer of any -pending pages. Beginning and end of stream cues are read from the -bitstream and are unaffected by reset.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -char *ogg_sync_buffer(ogg_sync_state *oy, long size); -

    - -

    This call is used to buffer a raw bitstream for framing and -verification. ogg_sync_buffer handles stream capture and -recapture, checksumming, and division into Ogg pages (as required by -ogg_stream_pagein).

    - -

    ogg_sync_buffer exposes a buffer area into which the decoder -copies the next (up to) size bytes. We expose the buffer -(rather than taking a buffer) in order to avoid an extra copy many -uses; this way, for example, read() can transfer data -directly into the stream buffer without first needing to place it in -temporary storage.

    - -

    Returns a pointer into oy's internal bitstream sync buffer; -the remaining space in the sync buffer is at least size -bytes. The decoder need not write all of size bytes; -ogg_sync_wrote is used to inform the engine how many bytes -were actually written. Use of ogg_sync_wrote after writing -into the exposed buffer is mandantory.

    - -

    -int ogg_sync_clear(ogg_sync_state *oy); -

    - -

    ogg_sync_clear -clears and deallocates the internal storage of the given Ogg sync -buffer. After clearing, the sync structure is not initialized for -use; ogg_sync_init must be called to reinitialize for use. -Use ogg_sync_reset to reset the sync state and buffer to a -fresh, intiialized state.

    - -

    ogg_sync_clear does not call free() on the pointer -oy, allowing use of this call on sync structures in static -or automatic storage. ogg_sync_destroyis a complimentary -function that frees the pointer as well.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -int ogg_sync_destroy(ogg_sync_state *oy); -

    - -

    Clears and deallocates the internal storage of the given Ogg sync -buffer, then frees the storage associated with the pointer -oy.

    - -

    An alternative function,ogg_sync_clear, does not call -free() on the pointer oy, allowing use of that call on -stream structures in static or automatic storage.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -int ogg_sync_init(ogg_sync_state *oy); -

    - -

    Initializes the sync buffer oy for use.

    - -

    Returns zero on success and non-zero on failure. This function always -succeeds.

    - -

    -int ogg_sync_pageout(ogg_sync_state *oy, ogg_page *og); -

    - -

    Reads complete, framed, verified Ogg pages from the sync buffer, -placing the page data in og.

    - -

    Returns zero when there's no complete pages buffered for -retrieval. Returns negative when a loss of sync or recapture occurred -(this is not necessarily an error; recapture would be required after -seeking, for example). Returns positive when a page is returned in -og. Note that the data in og points into the sync -buffer storage; the pointers are valid until the next call to -ogg_sync_buffer, ogg_sync_clear, -ogg_sync_destroy or ogg_sync_reset.

    - -

    -int ogg_sync_reset(ogg_sync_state *oy); -

    - -

    ogg_sync_reset resets the sync state in oy to a -clean, empty state. This is useful, for example, when seeking to a -new location in a bitstream.

    - -

    Returns zero on success, nonzero on failure.

    - -

    -int ogg_sync_wrote(ogg_sync_state *oy, long bytes); -

    - -

    Used to inform the sync state as to how many bytes were actually -written into the exposed sync buffer. It must be equal to or less -than the size of the buffer requested.

    - -

    Returns zero on success and non-zero on failure; failure occurs only -when the number of bytes written were larger than the buffer.

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/residue-pack.png b/ExternalLibs/libvorbis-1.3.1/doc/residue-pack.png deleted file mode 100644 index 6ed071b..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/residue-pack.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/residue2.png b/ExternalLibs/libvorbis-1.3.1/doc/residue2.png deleted file mode 100644 index e8bde32..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/residue2.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.txt b/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.txt deleted file mode 100644 index 67adf92..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.txt +++ /dev/null @@ -1,1459 +0,0 @@ - - - - - - -Network Working Group L. Barbato -Request for Comments: 5215 Xiph -Category: Standards Track August 2008 - - - RTP Payload Format for Vorbis Encoded Audio - -Status of This Memo - - This document specifies an Internet standards track protocol for the - Internet community, and requests discussion and suggestions for - improvements. Please refer to the current edition of the "Internet - Official Protocol Standards" (STD 1) for the standardization state - and status of this protocol. Distribution of this memo is unlimited. - -Abstract - - This document describes an RTP payload format for transporting Vorbis - encoded audio. It details the RTP encapsulation mechanism for raw - Vorbis data and the delivery mechanisms for the decoder probability - model (referred to as a codebook), as well as other setup - information. - - Also included within this memo are media type registrations and the - details necessary for the use of Vorbis with the Session Description - Protocol (SDP). - - - - - - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 1] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -Table of Contents - - 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1.1. Conformance and Document Conventions . . . . . . . . . . . 3 - 2. Payload Format . . . . . . . . . . . . . . . . . . . . . . . . 3 - 2.1. RTP Header . . . . . . . . . . . . . . . . . . . . . . . . 4 - 2.2. Payload Header . . . . . . . . . . . . . . . . . . . . . . 5 - 2.3. Payload Data . . . . . . . . . . . . . . . . . . . . . . . 6 - 2.4. Example RTP Packet . . . . . . . . . . . . . . . . . . . . 8 - 3. Configuration Headers . . . . . . . . . . . . . . . . . . . . 8 - 3.1. In-band Header Transmission . . . . . . . . . . . . . . . 9 - 3.1.1. Packed Configuration . . . . . . . . . . . . . . . . . 10 - 3.2. Out of Band Transmission . . . . . . . . . . . . . . . . . 12 - 3.2.1. Packed Headers . . . . . . . . . . . . . . . . . . . . 12 - 3.3. Loss of Configuration Headers . . . . . . . . . . . . . . 13 - 4. Comment Headers . . . . . . . . . . . . . . . . . . . . . . . 13 - 5. Frame Packetization . . . . . . . . . . . . . . . . . . . . . 14 - 5.1. Example Fragmented Vorbis Packet . . . . . . . . . . . . . 15 - 5.2. Packet Loss . . . . . . . . . . . . . . . . . . . . . . . 17 - 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18 - 6.1. Packed Headers IANA Considerations . . . . . . . . . . . . 19 - 7. SDP Related Considerations . . . . . . . . . . . . . . . . . . 20 - 7.1. Mapping Media Type Parameters into SDP . . . . . . . . . . 20 - 7.1.1. SDP Example . . . . . . . . . . . . . . . . . . . . . 21 - 7.2. Usage with the SDP Offer/Answer Model . . . . . . . . . . 22 - 8. Congestion Control . . . . . . . . . . . . . . . . . . . . . . 22 - 9. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 - 9.1. Stream Radio . . . . . . . . . . . . . . . . . . . . . . . 22 - 10. Security Considerations . . . . . . . . . . . . . . . . . . . 23 - 11. Copying Conditions . . . . . . . . . . . . . . . . . . . . . . 23 - 12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 23 - 13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 24 - 13.1. Normative References . . . . . . . . . . . . . . . . . . . 24 - 13.2. Informative References . . . . . . . . . . . . . . . . . . 25 - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 2] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -1. Introduction - - Vorbis is a general purpose perceptual audio codec intended to allow - maximum encoder flexibility, thus allowing it to scale competitively - over an exceptionally wide range of bit rates. At the high quality/ - bitrate end of the scale (CD or DAT rate stereo, 16/24 bits), it is - in the same league as MPEG-4 AAC. Vorbis is also intended for lower - and higher sample rates (from 8kHz telephony to 192kHz digital - masters) and a range of channel representations (monaural, - polyphonic, stereo, quadraphonic, 5.1, ambisonic, or up to 255 - discrete channels). - - Vorbis encoded audio is generally encapsulated within an Ogg format - bitstream [RFC3533], which provides framing and synchronization. For - the purposes of RTP transport, this layer is unnecessary, and so raw - Vorbis packets are used in the payload. - -1.1. Conformance and Document Conventions - - The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", - "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this - document are to be interpreted as described in BCP 14, [RFC2119] and - indicate requirement levels for compliant implementations. - Requirements apply to all implementations unless otherwise stated. - - An implementation is a software module that supports one of the media - types defined in this document. Software modules may support - multiple media types, but conformance is considered individually for - each type. - - Implementations that fail to satisfy one or more "MUST" requirements - are considered non-compliant. Implementations that satisfy all - "MUST" requirements, but fail to satisfy one or more "SHOULD" - requirements, are said to be "conditionally compliant". All other - implementations are "unconditionally compliant". - -2. Payload Format - - For RTP-based transport of Vorbis-encoded audio, the standard RTP - header is followed by a 4-octet payload header, and then the payload - data. The payload headers are used to associate the Vorbis data with - its associated decoding codebooks as well as indicate if the - following packet contains fragmented Vorbis data and/or the number of - whole Vorbis data frames. The payload data contains the raw Vorbis - bitstream information. There are 3 types of Vorbis data; an RTP - payload MUST contain just one of them at a time. - - - - - -Barbato Standards Track [Page 3] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -2.1. RTP Header - - The format of the RTP header is specified in [RFC3550] and shown in - Figure 1. This payload format uses the fields of the header in a - manner consistent with that specification. - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | sequence number | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | timestamp | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 1: RTP Header - - The RTP header begins with an octet of fields (V, P, X, and CC) to - support specialized RTP uses (see [RFC3550] and [RFC3551] for - details). For Vorbis RTP, the following values are used. - - Version (V): 2 bits - - This field identifies the version of RTP. The version used by this - specification is two (2). - - Padding (P): 1 bit - - Padding MAY be used with this payload format according to Section 5.1 - of [RFC3550]. - - Extension (X): 1 bit - - The Extension bit is used in accordance with [RFC3550]. - - CSRC count (CC): 4 bits - - The CSRC count is used in accordance with [RFC3550]. - - Marker (M): 1 bit - - Set to zero. Audio silence suppression is not used. This conforms - to Section 4.1 of [VORBIS-SPEC-REF]. - - - - -Barbato Standards Track [Page 4] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Payload Type (PT): 7 bits - - An RTP profile for a class of applications is expected to assign a - payload type for this format, or a dynamically allocated payload type - SHOULD be chosen that designates the payload as Vorbis. - - Sequence number: 16 bits - - The sequence number increments by one for each RTP data packet sent, - and may be used by the receiver to detect packet loss and to restore - the packet sequence. This field is detailed further in [RFC3550]. - - Timestamp: 32 bits - - A timestamp representing the sampling time of the first sample of the - first Vorbis packet in the RTP payload. The clock frequency MUST be - set to the sample rate of the encoded audio data and is conveyed out- - of-band (e.g., as an SDP parameter). - - SSRC/CSRC identifiers: - - These two fields, 32 bits each with one SSRC field and a maximum of - 16 CSRC fields, are as defined in [RFC3550]. - -2.2. Payload Header - - The 4 octets following the RTP Header section are the Payload Header. - This header is split into a number of bit fields detailing the format - of the following payload data packets. - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | F |VDT|# pkts.| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 2: Payload Header - - Ident: 24 bits - - This 24-bit field is used to associate the Vorbis data to a decoding - Configuration. It is stored as a network byte order integer. - - Fragment type (F): 2 bits - - - - - - - -Barbato Standards Track [Page 5] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - This field is set according to the following list: - - 0 = Not Fragmented - - 1 = Start Fragment - - 2 = Continuation Fragment - - 3 = End Fragment - - Vorbis Data Type (VDT): 2 bits - - This field specifies the kind of Vorbis data stored in this RTP - packet. There are currently three different types of Vorbis - payloads. Each packet MUST contain only a single type of Vorbis - packet (e.g., you must not aggregate configuration and comment - packets in the same RTP payload). - - 0 = Raw Vorbis payload - - 1 = Vorbis Packed Configuration payload - - 2 = Legacy Vorbis Comment payload - - 3 = Reserved - - The packets with a VDT of value 3 MUST be ignored. - - The last 4 bits represent the number of complete packets in this - payload. This provides for a maximum number of 15 Vorbis packets in - the payload. If the payload contains fragmented data, the number of - packets MUST be set to 0. - -2.3. Payload Data - - Raw Vorbis packets are currently unbounded in length; application - profiles will likely define a practical limit. Typical Vorbis packet - sizes range from very small (2-3 bytes) to quite large (8-12 - kilobytes). The reference implementation [LIBVORBIS] typically - produces packets less than ~800 bytes, except for the setup header - packets, which are ~4-12 kilobytes. Within an RTP context, to avoid - fragmentation, the Vorbis data packet size SHOULD be kept - sufficiently small so that after adding the RTP and payload headers, - the complete RTP packet is smaller than the path MTU. - - - - - - - -Barbato Standards Track [Page 6] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | vorbis packet data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 3: Payload Data Header - - Each Vorbis payload packet starts with a two octet length header, - which is used to represent the size in bytes of the following data - payload, and is followed by the raw Vorbis data padded to the nearest - byte boundary, as explained by the Vorbis I Specification - [VORBIS-SPEC-REF]. The length value is stored as a network byte - order integer. - - For payloads that consist of multiple Vorbis packets, the payload - data consists of the packet length followed by the packet data for - each of the Vorbis packets in the payload. - - The Vorbis packet length header is the length of the Vorbis data - block only and does not include the length field. - - The payload packing of the Vorbis data packets MUST follow the - guidelines set out in [RFC3551], where the oldest Vorbis packet - occurs immediately after the RTP packet header. Subsequent Vorbis - packets, if any, MUST follow in temporal order. - - Audio channel mapping is in accordance with the Vorbis I - Specification [VORBIS-SPEC-REF]. - - - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 7] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -2.4. Example RTP Packet - - Here is an example RTP payload containing two Vorbis packets. - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | 2 |0|0| 0 |0| PT | sequence number | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | timestamp (in sample rate units) | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronisation source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 0 | 0 | 2 pks | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | vorbis data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | next vorbis packet data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 4: Example Raw Vorbis Packet - - The payload data section of the RTP packet begins with the 24-bit - Ident field followed by the one octet bit field header, which has the - number of Vorbis frames set to 2. Each of the Vorbis data frames is - prefixed by the two octets length field. The Packet Type and - Fragment Type are set to 0. The Configuration that will be used to - decode the packets is the one indexed by the ident value. - -3. Configuration Headers - - Unlike other mainstream audio codecs, Vorbis has no statically - configured probability model. Instead, it packs all entropy decoding - configuration, Vector Quantization and Huffman models into a data - block that must be transmitted to the decoder with the compressed - data. A decoder also requires information detailing the number of - audio channels, bitrates, and similar information to configure itself - for a particular compressed data stream. These two blocks of - - - -Barbato Standards Track [Page 8] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - information are often referred to collectively as the "codebooks" for - a Vorbis stream, and are included as special "header" packets at the - start of the compressed data. In addition, the Vorbis I - specification [VORBIS-SPEC-REF] requires the presence of a comment - header packet that gives simple metadata about the stream, but this - information is not required for decoding the frame sequence. - - Thus, these two codebook header packets must be received by the - decoder before any audio data can be interpreted. These requirements - pose problems in RTP, which is often used over unreliable transports. - - Since this information must be transmitted reliably and, as the RTP - stream may change certain configuration data mid-session, there are - different methods for delivering this configuration data to a client, - both in-band and out-of-band, which are detailed below. In order to - set up an initial state for the client application, the configuration - MUST be conveyed via the signalling channel used to set up the - session. One example of such signalling is SDP [RFC4566] with the - Offer/Answer Model [RFC3264]. Changes to the configuration MAY be - communicated via a re-invite, conveying a new SDP, or sent in-band in - the RTP channel. Implementations MUST support an in-band delivery of - updated codebooks, and SHOULD support out-of-band codebook update - using a new SDP file. The changes may be due to different codebooks - as well as different bitrates of the RTP stream. - - For non-chained streams, the recommended Configuration delivery - method is inside the Packed Configuration (Section 3.1.1) in the SDP - as explained the Mapping Media Type Parameters into SDP - (Section 7.1). - - The 24-bit Ident field is used to map which Configuration will be - used to decode a packet. When the Ident field changes, it indicates - that a change in the stream has taken place. The client application - MUST have in advance the correct configuration. If the client - detects a change in the Ident value and does not have this - information, it MUST NOT decode the raw associated Vorbis data until - it fetches the correct Configuration. - -3.1. In-band Header Transmission - - The Packed Configuration (Section 3.1.1) Payload is sent in-band with - the packet type bits set to match the Vorbis Data Type. Clients MUST - be capable of dealing with fragmentation and periodic re-transmission - of [RFC4588] the configuration headers. The RTP timestamp value MUST - reflect the transmission time of the first data packet for which this - configuration applies. - - - - - -Barbato Standards Track [Page 9] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -3.1.1. Packed Configuration - - A Vorbis Packed Configuration is indicated with the Vorbis Data Type - field set to 1. Of the three headers defined in the Vorbis I - specification [VORBIS-SPEC-REF], the Identification and the Setup - MUST be packed as they are, while the Comment header MAY be replaced - with a dummy one. - - The packed configuration stores Xiph codec configurations in a - generic way: the first field stores the number of the following - packets minus one (count field), the next ones represent the size of - the headers (length fields), and the headers immediately follow the - list of length fields. The size of the last header is implicit. - - The count and the length fields are encoded using the following - logic: the data is in network byte order; every byte has the most - significant bit used as a flag, and the following 7 bits are used to - store the value. The first 7 most significant bits are stored in the - first byte. If there are remaining bits, the flag bit is set to 1 - and the subsequent 7 bits are stored in the following byte. If there - are remaining bits, set the flag to 1 and the same procedure is - repeated. The ending byte has the flag bit set to 0. To decode, - simply iterate over the bytes until the flag bit is set to 0. For - every byte, the data is added to the accumulated value multiplied by - 128. - - The headers are packed in the same order as they are present in Ogg - [VORBIS-SPEC-REF]: Identification, Comment, Setup. - - The 2 byte length tag defines the length of the packed headers as the - sum of the Configuration, Comment, and Setup lengths. - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 10] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | xxxx | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | xxxxx | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 0 | 1 | 1| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | n. of headers | length1 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length2 | Identification .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Identification .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Identification .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Identification .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Identification | Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment | Setup .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Setup .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Setup .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 5: Packed Configuration Figure - - The Ident field is set with the value that will be used by the Raw - Payload Packets to address this Configuration. The Fragment type is - set to 0 because the packet bears the full Packed configuration. The - number of the packet is set to 1. - - - - - -Barbato Standards Track [Page 11] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -3.2. Out of Band Transmission - - The following packet definition MUST be used when Configuration is - inside in the SDP. - -3.2.1. Packed Headers - - As mentioned above, the RECOMMENDED delivery vector for Vorbis - configuration data is via a retrieval method that can be performed - using a reliable transport protocol. As the RTP headers are not - required for this method of delivery, the structure of the - configuration data is slightly different. The packed header starts - with a 32-bit (network-byte ordered) count field, which details the - number of packed headers that are contained in the bundle. The - following shows the Packed header payload for each chained Vorbis - stream. - - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Number of packed headers | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Packed header | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Packed header | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 6: Packed Headers Overview - - - - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 12] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | length .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. | n. of headers | length1 | length2 .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. | Identification Header .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - ................................................................. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. | Comment Header .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - ................................................................. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment Header | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Setup Header .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - ................................................................. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Setup Header | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 7: Packed Headers Detail - - The key difference between the in-band format and this one is that - there is no need for the payload header octet. In this figure, the - comment has a size bigger than 127 bytes. - -3.3. Loss of Configuration Headers - - Unlike the loss of raw Vorbis payload data, loss of a configuration - header leads to a situation where it will not be possible to - successfully decode the stream. Implementations MAY try to recover - from an error by requesting again the missing Configuration or, if - the delivery method is in-band, by buffering the payloads waiting for - the Configuration needed to decode them. The baseline reaction - SHOULD either be reset or end the RTP session. - -4. Comment Headers - - Vorbis Data Type flag set to 2 indicates that the packet contains the - comment metadata, such as artist name, track title, and so on. These - metadata messages are not intended to be fully descriptive but rather - to offer basic track/song information. Clients MAY ignore it - completely. The details on the format of the comments can be found - in the Vorbis I Specification [VORBIS-SPEC-REF]. - - - -Barbato Standards Track [Page 13] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | xxxx | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | xxxxx | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 0 | 2 | 1| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. Comment | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 8: Comment Packet - - The 2-byte length field is necessary since this packet could be - fragmented. - -5. Frame Packetization - - Each RTP payload contains either one Vorbis packet fragment or an - integer number of complete Vorbis packets (up to a maximum of 15 - packets, since the number of packets is defined by a 4-bit value). - - Any Vorbis data packet that is less than path MTU SHOULD be bundled - in the RTP payload with as many Vorbis packets as will fit, up to a - maximum of 15, except when such bundling would exceed an - application's desired transmission latency. Path MTU is detailed in - [RFC1191] and [RFC1981]. - - A fragmented packet has a zero in the last four bits of the payload - header. The first fragment will set the Fragment type to 1. Each - fragment after the first will set the Fragment type to 2 in the - payload header. The consecutive fragments MUST be sent without any - other payload being sent between the first and the last fragment. - The RTP payload containing the last fragment of the Vorbis packet - will have the Fragment type set to 3. To maintain the correct - sequence for fragmented packet reception, the timestamp field of - fragmented packets MUST be the same as the first packet sent, with - - - -Barbato Standards Track [Page 14] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - the sequence number incremented as normal for the subsequent RTP - payloads; this will affect the RTCP jitter measurement. The length - field shows the fragment length. - -5.1. Example Fragmented Vorbis Packet - - Here is an example of a fragmented Vorbis packet split over three RTP - payloads. Each of them contains the standard RTP headers as well as - the 4-octet Vorbis headers. - - Packet 1: - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | 1000 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | 12345 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 1 | 0 | 0| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | vorbis data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 9: Example Fragmented Packet (Packet 1) - - In this payload, the initial sequence number is 1000 and the - timestamp is 12345. The Fragment type is set to 1, the number of - packets field is set to 0, and as the payload is raw Vorbis data, the - VDT field is set to 0. - - - - - - - - - - - - - -Barbato Standards Track [Page 15] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Packet 2: - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | 1001 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | 12345 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 2 | 0 | 0| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | vorbis data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 10: Example Fragmented Packet (Packet 2) - - The Fragment type field is set to 2, and the number of packets field - is set to 0. For large Vorbis fragments, there can be several of - these types of payloads. The maximum packet size SHOULD be no - greater than the path MTU, including all RTP and payload headers. - The sequence number has been incremented by one, but the timestamp - field remains the same as the initial payload. - - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 16] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Packet 3: - - 0 1 2 3 - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - |V=2|P|X| CC |M| PT | 1002 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | 12345 | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | synchronization source (SSRC) identifier | - +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ - | contributing source (CSRC) identifiers | - | ... | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | Ident | 3 | 0 | 0| - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | length | vorbis data .. - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - .. vorbis data | - +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - - Figure 11: Example Fragmented Packet (Packet 3) - - This is the last Vorbis fragment payload. The Fragment type is set - to 3 and the packet count remains set to 0. As in the previous - payloads, the timestamp remains set to the first payload timestamp in - the sequence and the sequence number has been incremented. - -5.2. Packet Loss - - As there is no error correction within the Vorbis stream, packet loss - will result in a loss of signal. Packet loss is more of an issue for - fragmented Vorbis packets as the client will have to cope with the - handling of the Fragment Type. In case of loss of fragments, the - client MUST discard all the remaining Vorbis fragments and decode the - incomplete packet. If we use the fragmented Vorbis packet example - above and the first RTP payload is lost, the client MUST detect that - the next RTP payload has the packet count field set to 0 and the - Fragment type 2 and MUST drop it. The next RTP payload, which is the - final fragmented packet, MUST be dropped in the same manner. If the - missing RTP payload is the last, the two fragments received will be - kept and the incomplete Vorbis packet decoded. - - Loss of any of the Configuration fragment will result in the loss of - the full Configuration packet with the result detailed in the Loss of - Configuration Headers (Section 3.3) section. - - - - -Barbato Standards Track [Page 17] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -6. IANA Considerations - - Type name: audio - - Subtype name: vorbis - - Required parameters: - - rate: indicates the RTP timestamp clock rate as described in RTP - Profile for Audio and Video Conferences with Minimal Control - [RFC3551]. - - channels: indicates the number of audio channels as described in - RTP Profile for Audio and Video Conferences with Minimal - Control [RFC3551]. - - configuration: the base64 [RFC4648] representation of the Packed - Headers (Section 3.2.1). - - Encoding considerations: - - This media type is framed and contains binary data. - - Security considerations: - - See Section 10 of RFC 5215. - - Interoperability considerations: - - None - - Published specification: - - RFC 5215 - - Ogg Vorbis I specification: Codec setup and packet decode. - Available from the Xiph website, http://xiph.org/ - - Applications which use this media type: - - Audio streaming and conferencing tools - - Additional information: - - None - - - - - - -Barbato Standards Track [Page 18] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Person & email address to contact for further information: - - Luca Barbato: - IETF Audio/Video Transport Working Group - - Intended usage: - - COMMON - - Restriction on usage: - - This media type depends on RTP framing, hence is only defined for - transfer via RTP [RFC3550]. - - Author: - - Luca Barbato - - Change controller: - - IETF AVT Working Group delegated from the IESG - -6.1. Packed Headers IANA Considerations - - The following IANA considerations refers to the split configuration - Packed Headers (Section 3.2.1) used within RFC 5215. - - Type name: audio - - Subtype name: vorbis-config - - Required parameters: - - None - - Optional parameters: - - None - - Encoding considerations: - - This media type contains binary data. - - Security considerations: - - See Section 10 of RFC 5215. - - - - - -Barbato Standards Track [Page 19] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Interoperability considerations: - - None - - Published specification: - - RFC 5215 - - Applications which use this media type: - - Vorbis encoded audio, configuration data - - Additional information: - - None - - Person & email address to contact for further information: - - Luca Barbato: - IETF Audio/Video Transport Working Group - - Intended usage: COMMON - - Restriction on usage: - - This media type doesn't depend on the transport. - - Author: - - Luca Barbato - - Change controller: - - IETF AVT Working Group delegated from the IESG - -7. SDP Related Considerations - - The following paragraphs define the mapping of the parameters - described in the IANA considerations section and their usage in the - Offer/Answer Model [RFC3264]. In order to be forward compatible, the - implementation MUST ignore unknown parameters. - -7.1. Mapping Media Type Parameters into SDP - - The information carried in the Media Type specification has a - specific mapping to fields in the Session Description Protocol (SDP) - [RFC4566], which is commonly used to describe RTP sessions. When SDP - is used to specify sessions, the mapping are as follows: - - - -Barbato Standards Track [Page 20] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - o The type name ("audio") goes in SDP "m=" as the media name. - - o The subtype name ("vorbis") goes in SDP "a=rtpmap" as the encoding - name. - - o The parameter "rate" also goes in "a=rtpmap" as the clock rate. - - o The parameter "channels" also goes in "a=rtpmap" as the channel - count. - - o The mandated parameters "configuration" MUST be included in the - SDP "a=fmtp" attribute. - - If the stream comprises chained Vorbis files and all of them are - known in advance, the Configuration Packet for each file SHOULD be - passed to the client using the configuration attribute. - - The port value is specified by the server application bound to the - address specified in the c= line. The channel count value specified - in the rtpmap attribute SHOULD match the current Vorbis stream or - should be considered the maximum number of channels to be expected. - The timestamp clock rate MUST be a multiple of the sample rate; a - different payload number MUST be used if the clock rate changes. The - Configuration payload delivers the exact information, thus the SDP - information SHOULD be considered a hint. An example is found below. - -7.1.1. SDP Example - - The following example shows a basic SDP single stream. The first - configuration packet is inside the SDP; other configurations could be - fetched at any time from the URIs provided. The following base64 - [RFC4648] configuration string is folded in this example due to RFC - line length limitations. - - c=IN IP4 192.0.2.1 - - m=audio RTP/AVP 98 - - a=rtpmap:98 vorbis/44100/2 - - a=fmtp:98 configuration=AAAAAZ2f4g9NAh4aAXZvcmJpcwA...; - - Note that the payload format (encoding) names are commonly shown in - uppercase. Media Type subtypes are commonly shown in lowercase. - These names are case-insensitive in both places. Similarly, - parameter names are case-insensitive both in Media Type types and in - the default mapping to the SDP a=fmtp attribute. The a=fmtp line is - - - - -Barbato Standards Track [Page 21] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - a single line, even if it is shown as multiple lines in this document - for clarity. - -7.2. Usage with the SDP Offer/Answer Model - - There are no negotiable parameters. All of them are declarative. - -8. Congestion Control - - The general congestion control considerations for transporting RTP - data apply to Vorbis audio over RTP as well. See the RTP - specification [RFC3550] and any applicable RTP profile (e.g., - [RFC3551]). Audio data can be encoded using a range of different bit - rates, so it is possible to adapt network bandwidth by adjusting the - encoder bit rate in real time or by having multiple copies of content - encoded at different bit rates. - -9. Example - - The following example shows a common usage pattern that MAY be - applied in such a situation. The main scope of this section is to - explain better usage of the transmission vectors. - -9.1. Stream Radio - - This is one of the most common situations: there is one single server - streaming content in multicast, and the clients may start a session - at a random time. The content itself could be a mix of a live stream - (as the webjockey's voice) and stored streams (as the music she - plays). - - In this situation, we don't know in advance how many codebooks we - will use. The clients can join anytime and users expect to start - listening to the content in a short time. - - Upon joining, the client will receive the current Configuration - necessary to decode the current stream inside the SDP so that the - decoding will start immediately after. - - When the streamed content changes, the new Configuration is sent in- - band before the actual stream, and the Configuration that has to be - sent inside the SDP is updated. Since the in-band method is - unreliable, an out-of-band fallback is provided. - - The client may choose to fetch the Configuration from the alternate - source as soon as it discovers a Configuration packet got lost in- - band, or use selective retransmission [RFC3611] if the server - supports this feature. - - - -Barbato Standards Track [Page 22] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - A server-side optimization would be to keep a hash list of the - Configurations per session, which avoids packing all of them and - sending the same Configuration with different Ident tags. - - A client-side optimization would be to keep a tag list of the - Configurations per session and not process configuration packets that - are already known. - -10. Security Considerations - - RTP packets using this payload format are subject to the security - considerations discussed in the RTP specification [RFC3550], the - base64 specification [RFC4648], and the URI Generic syntax - specification [RFC3986]. Among other considerations, this implies - that the confidentiality of the media stream is achieved by using - encryption. Because the data compression used with this payload - format is applied end-to-end, encryption may be performed on the - compressed data. - -11. Copying Conditions - - The authors agree to grant third parties the irrevocable right to - copy, use, and distribute the work, with or without modification, in - any medium, without royalty, provided that, unless separate - permission is granted, redistributed modified works do not contain - misleading author, version, name of work, or endorsement information. - -12. Acknowledgments - - This document is a continuation of the following documents: - - Moffitt, J., "RTP Payload Format for Vorbis Encoded Audio", February - 2001. - - Kerr, R., "RTP Payload Format for Vorbis Encoded Audio", December - 2004. - - The Media Type declaration is a continuation of the following - document: - - Short, B., "The audio/rtp-vorbis MIME Type", January 2008. - - Thanks to the AVT, Vorbis Communities / Xiph.Org Foundation including - Steve Casner, Aaron Colwell, Ross Finlayson, Fluendo, Ramon Garcia, - Pascal Hennequin, Ralph Giles, Tor-Einar Jarnbjo, Colin Law, John - Lazzaro, Jack Moffitt, Christopher Montgomery, Colin Perkins, Barry - Short, Mike Smith, Phil Kerr, Michael Sparks, Magnus Westerlund, - David Barrett, Silvia Pfeiffer, Stefan Ehmann, Gianni Ceccarelli, and - - - -Barbato Standards Track [Page 23] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - - Alessandro Salvatori. Thanks to the LScube Group, in particular - Federico Ridolfo, Francesco Varano, Giampaolo Mancini, Dario - Gallucci, and Juan Carlos De Martin. - -13. References - -13.1. Normative References - - [RFC1191] Mogul, J. and S. Deering, "Path MTU discovery", - RFC 1191, November 1990. - - [RFC1981] McCann, J., Deering, S., and J. Mogul, "Path MTU - Discovery for IP version 6", RFC 1981, - August 1996. - - [RFC2119] Bradner, S., "Key words for use in RFCs to - Indicate Requirement Levels", BCP 14, RFC 2119, - March 1997. - - [RFC3264] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer - Model with Session Description Protocol (SDP)", - RFC 3264, June 2002. - - [RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and V. - Jacobson, "RTP: A Transport Protocol for Real-Time - Applications", STD 64, RFC 3550, July 2003. - - [RFC3551] Schulzrinne, H. and S. Casner, "RTP Profile for - Audio and Video Conferences with Minimal Control", - STD 65, RFC 3551, July 2003. - - [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, - "Uniform Resource Identifier (URI): Generic - Syntax", STD 66, RFC 3986, January 2005. - - [RFC4566] Handley, M., Jacobson, V., and C. Perkins, "SDP: - Session Description Protocol", RFC 4566, - July 2006. - - [RFC4648] Josefsson, S., "The Base16, Base32, and Base64 - Data Encodings", RFC 4648, October 2006. - - [VORBIS-SPEC-REF] "Ogg Vorbis I specification: Codec setup and - packet decode. Available from the Xiph website, - http://xiph.org/vorbis/doc/Vorbis_I_spec.html". - - - - - - -Barbato Standards Track [Page 24] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -13.2. Informative References - - [LIBVORBIS] "libvorbis: Available from the dedicated website, - http://vorbis.com/". - - [RFC3533] Pfeiffer, S., "The Ogg Encapsulation Format - Version 0", RFC 3533, May 2003. - - [RFC3611] Friedman, T., Caceres, R., and A. Clark, "RTP - Control Protocol Extended Reports (RTCP XR)", - RFC 3611, November 2003. - - [RFC4588] Rey, J., Leon, D., Miyazaki, A., Varsa, V., and R. - Hakenberg, "RTP Retransmission Payload Format", - RFC 4588, July 2006. - -Author's Address - - Luca Barbato - Xiph.Org Foundation - - EMail: lu_zero@gentoo.org - URI: http://xiph.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Barbato Standards Track [Page 25] - -RFC 5215 Vorbis RTP Payload Format August 2008 - - -Full Copyright Statement - - Copyright (C) The IETF Trust (2008). - - This document is subject to the rights, licenses and restrictions - contained in BCP 78, and except as set forth therein, the authors - retain all their rights. - - This document and the information contained herein are provided on an - "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS - OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND - THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS - OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF - THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED - WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. - -Intellectual Property - - The IETF takes no position regarding the validity or scope of any - Intellectual Property Rights or other rights that might be claimed to - pertain to the implementation or use of the technology described in - this document or the extent to which any license under such rights - might or might not be available; nor does it represent that it has - made any independent effort to identify any such rights. Information - on the procedures with respect to rights in RFC documents can be - found in BCP 78 and BCP 79. - - Copies of IPR disclosures made to the IETF Secretariat and any - assurances of licenses to be made available, or the result of an - attempt made to obtain a general license or permission for the use of - such proprietary rights by implementers or users of this - specification can be obtained from the IETF on-line IPR repository at - http://www.ietf.org/ipr. - - The IETF invites any interested party to bring to its attention any - copyrights, patents or patent applications, or other proprietary - rights that may cover technology that may be required to implement - this standard. Please address the information to the IETF at - ietf-ipr@ietf.org. - - - - - - - - - - - - -Barbato Standards Track [Page 26] - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.xml b/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.xml deleted file mode 100644 index 719c100..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/rfc5215.xml +++ /dev/null @@ -1,1176 +0,0 @@ - - - - - - - - - - - - -RTP Payload Format for Vorbis Encoded Audio - - -Xiph.Org Foundation -
    -lu_zero@gentoo.org -http://xiph.org/ -
    -     - - - -General -AVT Working Group -I-D - -Internet-Draft -Vorbis -RTP - -example - - - - -This document describes an RTP payload format for transporting Vorbis encoded -audio. It details the RTP encapsulation mechanism for raw Vorbis data and -the delivery mechanisms for the decoder probability model (referred to -as a codebook), as well as other setup information. - - - -Also included within this memo are media type registrations and the details -necessary for the use of Vorbis with the Session Description Protocol (SDP). - - - - -     - - - -
    - - -Vorbis is a general purpose perceptual audio codec intended to allow -maximum encoder flexibility, thus allowing it to scale competitively -over an exceptionally wide range of bit rates. At the high -quality/bitrate end of the scale (CD or DAT rate stereo, 16/24 bits), it -is in the same league as MPEG-4 AAC. -Vorbis is also intended for lower and higher sample rates (from -8kHz telephony to 192kHz digital masters) and a range of channel -representations (monaural, polyphonic, stereo, quadraphonic, 5.1, -ambisonic, or up to 255 discrete channels). - - - -Vorbis encoded audio is generally encapsulated within an Ogg format bitstream -, which provides framing and synchronization. -For the purposes of RTP transport, this layer is unnecessary, and so raw Vorbis -packets are used in the payload. - - -
    - -The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, and indicate requirement levels for compliant implementations. Requirements apply to all implementations unless otherwise stated. -An implementation is a software module that supports one of the media types defined in this document. Software modules may support multiple media types, but conformance is considered individually for each type. -Implementations that fail to satisfy one or more "MUST" requirements are considered non-compliant. Implementations that satisfy all "MUST" requirements, but fail to satisfy one or more "SHOULD" requirements, are said to be "conditionally compliant". All other implementations are "unconditionally compliant". - -
    -
    - -
    - - -For RTP-based transport of Vorbis-encoded audio, the standard RTP header is -followed by a 4-octet payload header, and then the payload data. The payload -headers are used to associate the Vorbis data with its associated decoding -codebooks as well as indicate if the following packet contains fragmented -Vorbis data and/or the number of whole Vorbis data frames. The payload data -contains the raw Vorbis bitstream information. There are 3 types of Vorbis -data; an RTP payload MUST contain just one of them at a time. - - -
    - - -The format of the RTP header is specified in -and shown in . This payload format -uses the fields of the header in a manner consistent with that specification. - - - -
    - -
    -     - - -The RTP header begins with an octet of fields (V, P, X, and CC) to support -specialized RTP uses (see and - for details). For Vorbis RTP, the following -values are used. - - - -Version (V): 2 bits - -This field identifies the version of RTP. The version used by this -specification is two (2). - - - -Padding (P): 1 bit - -Padding MAY be used with this payload format according to Section 5.1 of -. - - - -Extension (X): 1 bit - -The Extension bit is used in accordance with . - - - -CSRC count (CC): 4 bits - -The CSRC count is used in accordance with . - - - -Marker (M): 1 bit - -Set to zero. Audio silence suppression is not used. This conforms to Section 4.1 -of . - - - -Payload Type (PT): 7 bits - -An RTP profile for a class of applications is expected to assign a payload type -for this format, or a dynamically allocated payload type SHOULD be chosen that -designates the payload as Vorbis. - - - -Sequence number: 16 bits - -The sequence number increments by one for each RTP data packet sent, and may be -used by the receiver to detect packet loss and to restore the packet sequence. This -field is detailed further in . - - - -Timestamp: 32 bits - -A timestamp representing the sampling time of the first sample of the first -Vorbis packet in the RTP payload. The clock frequency MUST be set to the sample -rate of the encoded audio data and is conveyed out-of-band (e.g., as an SDP parameter). - - - -SSRC/CSRC identifiers: - -These two fields, 32 bits each with one SSRC field and a maximum of 16 CSRC -fields, are as defined in -. - - -
    - -
    - - -The 4 octets following the RTP Header section are the Payload Header. This -header is split into a number of bit fields detailing the format of the -following payload data packets. - - -
    - -
    - - -Ident: 24 bits - -This 24-bit field is used to associate the Vorbis data to a decoding -Configuration. It is stored as a network byte order integer. - - - -Fragment type (F): 2 bits - -This field is set according to the following list: - - - - 0 = Not Fragmented - 1 = Start Fragment - 2 = Continuation Fragment - 3 = End Fragment - - - -Vorbis Data Type (VDT): 2 bits - -This field specifies the kind of Vorbis data stored in this RTP packet. There -are currently three different types of Vorbis payloads. Each packet MUST contain only a single type of Vorbis packet (e.g., you must not aggregate configuration and comment packets in the same RTP payload). - - - - - 0 = Raw Vorbis payload - 1 = Vorbis Packed Configuration payload - 2 = Legacy Vorbis Comment payload - 3 = Reserved - - - The packets with a VDT of value 3 MUST be ignored. - - -The last 4 bits represent the number of complete packets in this payload. This -provides for a maximum number of 15 Vorbis packets in the payload. If the -payload contains fragmented data, the number of packets MUST be set to 0. - - -
    - -
    - - -Raw Vorbis packets are currently unbounded in length; application profiles will -likely define a practical limit. Typical Vorbis packet sizes range from very -small (2-3 bytes) to quite large (8-12 kilobytes). The reference implementation - typically produces packets less than ~800 -bytes, except for the setup header packets, which are ~4-12 kilobytes. Within an -RTP context, to avoid fragmentation, the Vorbis data packet size SHOULD be kept -sufficiently small so that after adding the RTP and payload headers, the -complete RTP packet is smaller than the path MTU. - - -
    - -
    - - -Each Vorbis payload packet starts with a two octet length header, which is used -to represent the size in bytes of the following data payload, and is followed by the -raw Vorbis data padded to the nearest byte boundary, as explained by the Vorbis I Specification. The length value is stored -as a network byte order integer. - - - -For payloads that consist of multiple Vorbis packets, the payload data consists -of the packet length followed by the packet data for each of the Vorbis packets -in the payload. - - - -The Vorbis packet length header is the length of the Vorbis data block only and -does not include the length field. - - - -The payload packing of the Vorbis data packets MUST follow the guidelines -set out in , where the oldest Vorbis packet occurs -immediately after the RTP packet header. Subsequent Vorbis packets, if any, MUST -follow in temporal order. - - - -Audio channel mapping is in accordance with the -Vorbis I Specification. - - -
    - -
    - - -Here is an example RTP payload containing two Vorbis packets. - - -
    - -
    - - -The payload data section of the RTP packet begins with the 24-bit Ident field -followed by the one octet bit field header, which has the number of Vorbis -frames set to 2. Each of the Vorbis data frames is prefixed by the two octets -length field. The Packet Type and Fragment Type are set to 0. The Configuration -that will be used to decode the packets is the one indexed by the ident value. - - -
    -
    - - - -
    - - -Unlike other mainstream audio codecs, Vorbis has no statically -configured probability model. Instead, it packs all entropy decoding -configuration, Vector Quantization and Huffman models into a data block -that must be transmitted to the decoder with the compressed data. -A decoder also requires information detailing the number of audio -channels, bitrates, and similar information to configure itself for a -particular compressed data stream. These two blocks of information are -often referred to collectively as the "codebooks" for a Vorbis stream, -and are included as special "header" packets at the start -of the compressed data. In addition, -the Vorbis I specification -requires the presence of a comment header packet that gives simple -metadata about the stream, but this information is not required for -decoding the frame sequence. - - - -Thus, these two codebook header packets must be received by the decoder before -any audio data can be interpreted. These requirements pose problems in RTP, -which is often used over unreliable transports. - - - -Since this information must be transmitted reliably and, as the RTP -stream may change certain configuration data mid-session, there are -different methods for delivering this configuration data to a -client, both in-band and out-of-band, which are detailed below. -In order to set up an initial state for the client application, the -configuration MUST be conveyed via the signalling channel used to set up -the session. One example of such signalling is -SDP with the -Offer/Answer Model. -Changes to the configuration MAY be communicated via a re-invite, -conveying a new SDP, or sent in-band in the RTP channel. -Implementations MUST support an in-band delivery of updated codebooks, -and SHOULD support out-of-band codebook update using a new SDP file. -The changes may be due to different codebooks as well as -different bitrates of the RTP stream. - - -For non-chained streams, the recommended Configuration delivery -method is inside the Packed -Configuration in the SDP as explained the Mapping Media Type -Parameters into SDP. - - - -The 24-bit Ident field is used to map which Configuration will be used to -decode a packet. When the Ident field changes, it indicates that a change in -the stream has taken place. The client application MUST have in advance the -correct configuration. If the client detects a change in the Ident value and -does not have this information, it MUST NOT decode the raw associated Vorbis -data until it fetches the correct Configuration. - - -
    - - -The Packed Configuration Payload is -sent in-band with the packet type bits set to match the Vorbis Data Type. -Clients MUST be capable of dealing with fragmentation and periodic -re-transmission of the configuration headers. -The RTP timestamp value MUST reflect the transmission time of the first data packet for which this configuration applies. - - -
    - - -A Vorbis Packed Configuration is indicated with the Vorbis Data Type field set -to 1. Of the three headers defined in the -Vorbis I specification, the -Identification and the Setup MUST be packed as they are, while the Comment -header MAY be replaced with a dummy one. - -The packed configuration stores Xiph codec -configurations in a generic way: the first field stores the number of the following packets -minus one (count field), the next ones represent the size of the headers -(length fields), and the headers immediately follow the list of length fields. -The size of the last header is implicit. - -The count and the length fields are encoded using the following logic: the data -is in network byte order; every byte has the most significant bit used -as a flag, and the following 7 bits are used to store the value. -The first 7 most significant bits are stored in the first byte. -If there are remaining bits, the flag bit is set to 1 and the subsequent -7 bits are stored in the following byte. -If there are remaining bits, set the flag to 1 and the same procedure is -repeated. -The ending byte has the flag bit set to 0. To decode, simply iterate -over the bytes until the flag bit is set to 0. For every byte, the data -is added to the accumulated value multiplied by 128. - -The headers are packed in the same order as they are present in Ogg : -Identification, Comment, Setup. - - -The 2 byte length tag defines the length of the packed headers as the sum of -the Configuration, Comment, and Setup lengths. - -
    - -
    - -The Ident field is set with the value that will be used by the Raw Payload -Packets to address this Configuration. The Fragment type is set to 0 because the -packet bears the full Packed configuration. The number of the packet is set to 1. -
    -
    - -
    - - -The following packet definition MUST be used when Configuration is inside -in the SDP. - - -
    - - -As mentioned above, the RECOMMENDED delivery vector for Vorbis configuration -data is via a retrieval method that can be performed using a reliable transport -protocol. As the RTP headers are not required for this method of delivery, the -structure of the configuration data is slightly different. The packed header -starts with a 32-bit (network-byte ordered) count field, which details -the number of packed headers that are contained in the bundle. The -following shows the Packed header -payload for each chained Vorbis stream. - - -
    - -
    - -
    - -
    - -The key difference between the in-band format and this one is that there is no -need for the payload header octet. In this figure, the comment has a size bigger -than 127 bytes. - -
    - -
    - -
    - - -Unlike the loss of raw Vorbis payload data, loss of a configuration header -leads to a situation where it will not be possible to successfully decode the -stream. Implementations MAY try to recover from an error by requesting again the -missing Configuration or, if the delivery method is in-band, by buffering the -payloads waiting for the Configuration needed to decode them. -The baseline reaction SHOULD either be reset or end the RTP session. - - -
    - -
    - -
    - - -Vorbis Data Type flag set to 2 indicates that the packet contains -the comment metadata, such as artist name, track title, and so on. These -metadata messages are not intended to be fully descriptive but rather to offer basic -track/song information. Clients MAY ignore it completely. The details on the -format of the comments can be found in the Vorbis I Specification. - -
    - -
    - - -The 2-byte length field is necessary since this packet could be fragmented. - - -
    -
    - - -Each RTP payload contains either one Vorbis packet fragment or an integer -number of complete Vorbis packets (up to a maximum of 15 packets, since the -number of packets is defined by a 4-bit value). - - - -Any Vorbis data packet that is less than path MTU SHOULD be bundled in the RTP -payload with as many Vorbis packets as will fit, up to a maximum of 15, except -when such bundling would exceed an application's desired transmission latency. -Path MTU is detailed in and . - - - -A fragmented packet has a zero in the last four bits of the payload header. -The first fragment will set the Fragment type to 1. Each fragment after the -first will set the Fragment type to 2 in the payload header. The consecutive -fragments MUST be sent without any other payload being sent between the first -and the last fragment. The RTP payload containing the last fragment of the -Vorbis packet will have the Fragment type set to 3. To maintain the correct -sequence for fragmented packet reception, the timestamp field of fragmented -packets MUST be the same as the first packet sent, with the sequence number -incremented as normal for the subsequent RTP payloads; this will affect the -RTCP jitter measurement. The length field shows the fragment length. - - -
    - - -Here is an example of a fragmented Vorbis packet split over three RTP payloads. -Each of them contains the standard RTP headers as well as the 4-octet Vorbis -headers. - - -
    - -
    - - -In this payload, the initial sequence number is 1000 and the timestamp is 12345. The Fragment type is set to 1, the number of packets field is set to 0, and as -the payload is raw Vorbis data, the VDT field is set to 0. - - -
    - -
    - - -The Fragment type field is set to 2, and the number of packets field is set to 0. -For large Vorbis fragments, there can be several of these types of payloads. -The maximum packet size SHOULD be no greater than the path MTU, -including all RTP and payload headers. The sequence number has been incremented -by one, but the timestamp field remains the same as the initial payload. - - -
    - -
    - - -This is the last Vorbis fragment payload. The Fragment type is set to 3 and the -packet count remains set to 0. As in the previous payloads, the timestamp remains -set to the first payload timestamp in the sequence and the sequence number has -been incremented. - -
    - -
    - - -As there is no error correction within the Vorbis stream, packet loss will -result in a loss of signal. Packet loss is more of an issue for fragmented -Vorbis packets as the client will have to cope with the handling of the -Fragment Type. In case of loss of fragments, the client MUST discard all the -remaining Vorbis fragments and decode the incomplete packet. If we use the -fragmented Vorbis packet example above and the first RTP payload is lost, the -client MUST detect that the next RTP payload has the packet count field set -to 0 and the Fragment type 2 and MUST drop it. -The next RTP payload, which is the final fragmented packet, MUST be dropped -in the same manner. -If the missing RTP payload is the last, the two fragments received will be -kept and the incomplete Vorbis packet decoded. - - - -Loss of any of the Configuration fragment will result in the loss of the full -Configuration packet with the result detailed in the Loss of Configuration Headers section. - - -
    -
    -
    - - - audio - - vorbis - - - - - indicates the RTP timestamp clock rate as described in RTP Profile for Audio and Video Conferences with Minimal Control. - - - indicates the number of audio channels as described in RTP Profile for Audio and Video Conferences with Minimal Control. - - - - the base64 representation of the Packed Headers. - - - - - - -This media type is framed and contains binary data. - - - - -See Section 10 of RFC 5215. - - - -None - - - -RFC 5215 - -Ogg Vorbis I specification: Codec setup and packet decode. Available from the Xiph website, http://xiph.org/ - - - - - -Audio streaming and conferencing tools - - - -None - - - -Luca Barbato: <lu_zero@gentoo.org>
    - -IETF Audio/Video Transport Working Group - -     - - - -COMMON - - - -This media type depends on RTP framing, hence is only defined for transfer via RTP. - - -Luca Barbato - - -IETF AVT Working Group delegated from the IESG -     - -
    - - -The following IANA considerations refers to the split configuration Packed Headers used within RFC 5215. - - - - audio - - vorbis-config - - - -None - - - - -None - - - - -This media type contains binary data. - - - - -See Section 10 of RFC 5215. - - - - -None - - - - -RFC 5215 - - - - -Vorbis encoded audio, configuration data - - - - -None - - - - -Luca Barbato: <lu_zero@gentoo.org> - -IETF Audio/Video Transport Working Group - - - -COMMON - - - - -This media type doesn't depend on the transport. - - - - -Luca Barbato - - - -IETF AVT Working Group delegated from the IESG - - -
    - -
    - -
    - -The following paragraphs define the mapping of the parameters described in the IANA considerations section and their usage in the Offer/Answer Model. In order to be forward compatible, the implementation MUST ignore unknown parameters. - - -
    - - -The information carried in the Media Type specification has a -specific mapping to fields in the Session Description -Protocol (SDP), which is commonly used to describe RTP sessions. -When SDP is used to specify sessions, the mapping are as follows: - - - - -The type name ("audio") goes in SDP "m=" as the media name. - -The subtype name ("vorbis") goes in SDP "a=rtpmap" as the encoding name. - -The parameter "rate" also goes in "a=rtpmap" as the clock rate. - -The parameter "channels" also goes in "a=rtpmap" as the channel count. - -The mandated parameters "configuration" MUST be included in the SDP -"a=fmtp" attribute. - - - - -If the stream comprises chained Vorbis files and all of them are known in -advance, the Configuration Packet for each file SHOULD be passed to the client -using the configuration attribute. - - - -The port value is specified by the server application bound to the address -specified in the c= line. The channel count value specified in the rtpmap -attribute SHOULD match the current Vorbis stream or should be considered the maximum -number of channels to be expected. The timestamp clock rate MUST be a multiple -of the sample rate; a different payload number MUST be used if the clock rate -changes. The Configuration payload delivers the exact information, thus the -SDP information SHOULD be considered a hint. -An example is found below. - - -
    -The following example shows a basic SDP single stream. The first -configuration packet is inside the SDP; other configurations could be -fetched at any time from the URIs provided. The following -base64 configuration string is folded in this -example due to RFC line length limitations. - - - -c=IN IP4 192.0.2.1 -m=audio RTP/AVP 98 -a=rtpmap:98 vorbis/44100/2 -a=fmtp:98 configuration=AAAAAZ2f4g9NAh4aAXZvcmJpcwA...; - -
    - - -Note that the payload format (encoding) names are commonly shown in uppercase. -Media Type subtypes are commonly shown in lowercase. These names are -case-insensitive in both places. Similarly, parameter names are -case-insensitive both in Media Type types and in the default mapping to the SDP -a=fmtp attribute. The a=fmtp line is a single line, even if it is shown as multiple lines in this document for clarity. - - -
    - -
    - - -There are no negotiable parameters. All of them are declarative. - - -
    - -
    -
    - -The general congestion control considerations for transporting RTP -data apply to Vorbis audio over RTP as well. See the RTP specification - and any applicable RTP profile (e.g., ). -Audio data can be encoded using a range of different bit rates, so -it is possible to adapt network bandwidth by adjusting the encoder -bit rate in real time or by having multiple copies of content encoded - at different bit rates. - -
    -
    - - -The following example shows a common usage pattern that MAY be applied in -such a situation. The main scope of this section is to explain better usage -of the transmission vectors. - - -
    - -This is one of the most common situations: there is one single server streaming -content in multicast, and the clients may start a session at a random time. The -content itself could be a mix of a live stream (as the webjockey's voice) -and stored streams (as the music she plays). - -In this situation, we don't know in advance how many codebooks we will use. -The clients can join anytime and users expect to start listening to the content -in a short time. - -Upon joining, the client will receive the current Configuration necessary to -decode the current stream inside the SDP so that the decoding will start -immediately after. - -When the streamed content changes, the new Configuration is sent in-band -before the actual stream, and the Configuration that has to be sent inside -the SDP is updated. Since the in-band method is unreliable, an out-of-band -fallback is provided. - -The client may choose to fetch the Configuration from the alternate source -as soon as it discovers a Configuration packet got lost in-band, or use -selective retransmission if the server supports -this feature. - -A server-side optimization would be to keep a hash list of the -Configurations per session, which avoids packing all of them and sending the same -Configuration with different Ident tags. - -A client-side optimization would be to keep a tag list of the Configurations -per session and not process configuration packets that are already known. - -
    -
    - -
    - -RTP packets using this payload format are subject to the security -considerations discussed in the -RTP specification, the -base64 specification, and the -URI Generic syntax specification. -Among other considerations, this implies that the confidentiality of the -media stream is achieved by using encryption. Because the data compression used -with this payload format is applied end-to-end, encryption may be performed on -the compressed data. - - -
    -
    - The authors agree to grant third parties the irrevocable right to copy, - use, and distribute the work, with or without modification, in any medium, - without royalty, provided that, unless separate permission is granted, - redistributed modified works do not contain misleading author, version, - name of work, or endorsement information. -
    -
    - - -This document is a continuation of the following documents: - -Moffitt, J., "RTP Payload Format for Vorbis Encoded Audio", February 2001. - -Kerr, R., "RTP Payload Format for Vorbis Encoded Audio", December 2004. - -The Media Type declaration is a continuation of the following -document: -Short, B., "The audio/rtp-vorbis MIME Type", January 2008. - - - -Thanks to the AVT, Vorbis Communities / Xiph.Org Foundation including Steve Casner, -Aaron Colwell, Ross Finlayson, Fluendo, Ramon Garcia, Pascal Hennequin, Ralph -Giles, Tor-Einar Jarnbjo, Colin Law, John Lazzaro, Jack Moffitt, Christopher -Montgomery, Colin Perkins, Barry Short, Mike Smith, Phil Kerr, Michael Sparks, -Magnus Westerlund, David Barrett, Silvia Pfeiffer, Stefan Ehmann, Gianni Ceccarelli and Alessandro Salvatori. Thanks to the LScube Group, in particular Federico -Ridolfo, Francesco Varano, Giampaolo Mancini, Dario Gallucci, and Juan Carlos De Martin. - - -
    - -     - - - - - - - - - - - - - - - - - -Ogg Vorbis I specification: Codec setup and packet decode. Available from the Xiph website, http://xiph.org/vorbis/doc/Vorbis_I_spec.html - - - - - - - - - - - -libvorbis: Available from the dedicated website, http://vorbis.com/ - - - - - - - - -     diff --git a/ExternalLibs/libvorbis-1.3.1/doc/squarepolar.png b/ExternalLibs/libvorbis-1.3.1/doc/squarepolar.png deleted file mode 100644 index 4f9b03d..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/squarepolar.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/stereo.html b/ExternalLibs/libvorbis-1.3.1/doc/stereo.html deleted file mode 100644 index ef48f67..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/stereo.html +++ /dev/null @@ -1,419 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis stereo-specific channel coupling discussion

    - -

    Abstract

    - -

    The Vorbis audio CODEC provides a channel coupling -mechanisms designed to reduce effective bitrate by both eliminating -interchannel redundancy and eliminating stereo image information -labeled inaudible or undesirable according to spatial psychoacoustic -models. This document describes both the mechanical coupling -mechanisms available within the Vorbis specification, as well as the -specific stereo coupling models used by the reference -libvorbis codec provided by xiph.org.

    - -

    Mechanisms

    - -

    In encoder release beta 4 and earlier, Vorbis supported multiple -channel encoding, but the channels were encoded entirely separately -with no cross-analysis or redundancy elimination between channels. -This multichannel strategy is very similar to the mp3's dual -stereo mode and Vorbis uses the same name for its analogous -uncoupled multichannel modes.

    - -

    However, the Vorbis spec provides for, and Vorbis release 1.0 rc1 and -later implement a coupled channel strategy. Vorbis has two specific -mechanisms that may be used alone or in conjunction to implement -channel coupling. The first is channel interleaving via -residue backend type 2, and the second is square polar -mapping. These two general mechanisms are particularly well -suited to coupling due to the structure of Vorbis encoding, as we'll -explore below, and using both we can implement both totally -lossless stereo image coupling [bit-for-bit decode-identical -to uncoupled modes], as well as various lossy models that seek to -eliminate inaudible or unimportant aspects of the stereo image in -order to enhance bitrate. The exact coupling implementation is -generalized to allow the encoder a great deal of flexibility in -implementation of a stereo or surround model without requiring any -significant complexity increase over the combinatorially simpler -mid/side joint stereo of mp3 and other current audio codecs.

    - -

    A particular Vorbis bitstream may apply channel coupling directly to -more than a pair of channels; polar mapping is hierarchical such that -polar coupling may be extrapolated to an arbitrary number of channels -and is not restricted to only stereo, quadraphonics, ambisonics or 5.1 -surround. However, the scope of this document restricts itself to the -stereo coupling case.

    - - -

    Square Polar Mapping

    - -

    maximal correlation

    - -

    Recall that the basic structure of a a Vorbis I stream first generates -from input audio a spectral 'floor' function that serves as an -MDCT-domain whitening filter. This floor is meant to represent the -rough envelope of the frequency spectrum, using whatever metric the -encoder cares to define. This floor is subtracted from the log -frequency spectrum, effectively normalizing the spectrum by frequency. -Each input channel is associated with a unique floor function.

    - -

    The basic idea behind any stereo coupling is that the left and right -channels usually correlate. This correlation is even stronger if one -first accounts for energy differences in any given frequency band -across left and right; think for example of individual instruments -mixed into different portions of the stereo image, or a stereo -recording with a dominant feature not perfectly in the center. The -floor functions, each specific to a channel, provide the perfect means -of normalizing left and right energies across the spectrum to maximize -correlation before coupling. This feature of the Vorbis format is not -a convenient accident.

    - -

    Because we strive to maximally correlate the left and right channels -and generally succeed in doing so, left and right residue is typically -nearly identical. We could use channel interleaving (discussed below) -alone to efficiently remove the redundancy between the left and right -channels as a side effect of entropy encoding, but a polar -representation gives benefits when left/right correlation is -strong.

    - -

    point and diffuse imaging

    - -

    The first advantage of a polar representation is that it effectively -separates the spatial audio information into a 'point image' -(magnitude) at a given frequency and located somewhere in the sound -field, and a 'diffuse image' (angle) that fills a large amount of -space simultaneously. Even if we preserve only the magnitude (point) -data, a detailed and carefully chosen floor function in each channel -provides us with a free, fine-grained, frequency relative intensity -stereo*. Angle information represents diffuse sound fields, such as -reverberation that fills the entire space simultaneously.

    - -

    *Because the Vorbis model supports a number of different possible -stereo models and these models may be mixed, we do not use the term -'intensity stereo' talking about Vorbis; instead we use the terms -'point stereo', 'phase stereo' and subcategories of each.

    - -

    The majority of a stereo image is representable by polar magnitude -alone, as strong sounds tend to be produced at near-point sources; -even non-diffuse, fast, sharp echoes track very accurately using -magnitude representation almost alone (for those experimenting with -Vorbis tuning, this strategy works much better with the precise, -piecewise control of floor 1; the continuous approximation of floor 0 -results in unstable imaging). Reverberation and diffuse sounds tend -to contain less energy and be psychoacoustically dominated by the -point sources embedded in them. Thus, we again tend to concentrate -more represented energy into a predictably smaller number of numbers. -Separating representation of point and diffuse imaging also allows us -to model and manipulate point and diffuse qualities separately.

    - -

    controlling bit leakage and symbol crosstalk

    - -

    Because polar -representation concentrates represented energy into fewer large -values, we reduce bit 'leakage' during cascading (multistage VQ -encoding) as a secondary benefit. A single large, monolithic VQ -codebook is more efficient than a cascaded book due to entropy -'crosstalk' among symbols between different stages of a multistage cascade. -Polar representation is a way of further concentrating entropy into -predictable locations so that codebook design can take steps to -improve multistage codebook efficiency. It also allows us to cascade -various elements of the stereo image independently.

    - -

    eliminating trigonometry and rounding

    - -

    Rounding and computational complexity are potential problems with a -polar representation. As our encoding process involves quantization, -mixing a polar representation and quantization makes it potentially -impossible, depending on implementation, to construct a coupled stereo -mechanism that results in bit-identical decompressed output compared -to an uncoupled encoding should the encoder desire it.

    - -

    Vorbis uses a mapping that preserves the most useful qualities of -polar representation, relies only on addition/subtraction (during -decode; high quality encoding still requires some trig), and makes it -trivial before or after quantization to represent an angle/magnitude -through a one-to-one mapping from possible left/right value -permutations. We do this by basing our polar representation on the -unit square rather than the unit-circle.

    - -

    Given a magnitude and angle, we recover left and right using the -following function (note that A/B may be left/right or right/left -depending on the coupling definition used by the encoder):

    - -
    -      if(magnitude>0)
-        if(angle>0){
-          A=magnitude;
-          B=magnitude-angle;
-        }else{
-          B=magnitude;
-          A=magnitude+angle;
-        }
-      else
-        if(angle>0){
-          A=magnitude;
-          B=magnitude+angle;
-        }else{
-          B=magnitude;
-          A=magnitude-angle;
-        }
-    }
-
    - -

    The function is antisymmetric for positive and negative magnitudes in -order to eliminate a redundant value when quantizing. For example, if -we're quantizing to integer values, we can visualize a magnitude of 5 -and an angle of -2 as follows:

    - -

    square polar

    - -

    This representation loses or replicates no values; if the range of A -and B are integral -5 through 5, the number of possible Cartesian -permutations is 121. Represented in square polar notation, the -possible values are:

    - -
    - 0, 0
-
--1,-2  -1,-1  -1, 0  -1, 1
-
- 1,-2   1,-1   1, 0   1, 1
-
--2,-4  -2,-3  -2,-2  -2,-1  -2, 0  -2, 1  -2, 2  -2, 3  
-
- 2,-4   2,-3   ... following the pattern ...
-
- ...   5, 1   5, 2   5, 3   5, 4   5, 5   5, 6   5, 7   5, 8   5, 9
-
-
    - -

    ...for a grand total of 121 possible values, the same number as in -Cartesian representation (note that, for example, 5,-10 is -the same as -5,10, so there's no reason to represent -both. 2,10 cannot happen, and there's no reason to account for it.) -It's also obvious that this mapping is exactly reversible.

    - -

    Channel interleaving

    - -

    We can remap and A/B vector using polar mapping into a magnitude/angle -vector, and it's clear that, in general, this concentrates energy in -the magnitude vector and reduces the amount of information to encode -in the angle vector. Encoding these vectors independently with -residue backend #0 or residue backend #1 will result in bitrate -savings. However, there are still implicit correlations between the -magnitude and angle vectors. The most obvious is that the amplitude -of the angle is bounded by its corresponding magnitude value.

    - -

    Entropy coding the results, then, further benefits from the entropy -model being able to compress magnitude and angle simultaneously. For -this reason, Vorbis implements residue backend #2 which pre-interleaves -a number of input vectors (in the stereo case, two, A and B) into a -single output vector (with the elements in the order of -A_0, B_0, A_1, B_1, A_2 ... A_n-1, B_n-1) before entropy encoding. Thus -each vector to be coded by the vector quantization backend consists of -matching magnitude and angle values.

    - -

    The astute reader, at this point, will notice that in the theoretical -case in which we can use monolithic codebooks of arbitrarily large -size, we can directly interleave and encode left and right without -polar mapping; in fact, the polar mapping does not appear to lend any -benefit whatsoever to the efficiency of the entropy coding. In fact, -it is perfectly possible and reasonable to build a Vorbis encoder that -dispenses with polar mapping entirely and merely interleaves the -channel. Libvorbis based encoders may configure such an encoding and -it will work as intended.

    - -

    However, when we leave the ideal/theoretical domain, we notice that -polar mapping does give additional practical benefits, as discussed in -the above section on polar mapping and summarized again here:

    - -
      -
    • Polar mapping aids in controlling entropy 'leakage' between stages -of a cascaded codebook.
      • -
    • Polar mapping separates the stereo image -into point and diffuse components which may be analyzed and handled -differently.
      • -
    - -

    Stereo Models

    - -

    Dual Stereo

    - -

    Dual stereo refers to stereo encoding where the channels are entirely -separate; they are analyzed and encoded as entirely distinct entities. -This terminology is familiar from mp3.

    - -

    Lossless Stereo

    - -

    Using polar mapping and/or channel interleaving, it's possible to -couple Vorbis channels losslessly, that is, construct a stereo -coupling encoding that both saves space but also decodes -bit-identically to dual stereo. OggEnc 1.0 and later uses this -mode in all high-bitrate encoding.

    - -

    Overall, this stereo mode is overkill; however, it offers a safe -alternative to users concerned about the slightest possible -degradation to the stereo image or archival quality audio.

    - -

    Phase Stereo

    - -

    Phase stereo is the least aggressive means of gracefully dropping -resolution from the stereo image; it affects only diffuse imaging.

    - -

    It's often quoted that the human ear is deaf to signal phase above -about 4kHz; this is nearly true and a passable rule of thumb, but it -can be demonstrated that even an average user can tell the difference -between high frequency in-phase and out-of-phase noise. Obviously -then, the statement is not entirely true. However, it's also the case -that one must resort to nearly such an extreme demonstration before -finding the counterexample.

    - -

    'Phase stereo' is simply a more aggressive quantization of the polar -angle vector; above 4kHz it's generally quite safe to quantize noise -and noisy elements to only a handful of allowed phases, or to thin the -phase with respect to the magnitude. The phases of high amplitude -pure tones may or may not be preserved more carefully (they are -relatively rare and L/R tend to be in phase, so there is generally -little reason not to spend a few more bits on them)

    - -

    example: eight phase stereo

    - -

    Vorbis may implement phase stereo coupling by preserving the entirety -of the magnitude vector (essential to fine amplitude and energy -resolution overall) and quantizing the angle vector to one of only -four possible values. Given that the magnitude vector may be positive -or negative, this results in left and right phase having eight -possible permutation, thus 'eight phase stereo':

    - -

    eight phase

    - -

    Left and right may be in phase (positive or negative), the most common -case by far, or out of phase by 90 or 180 degrees.

    - -

    example: four phase stereo

    - -

    Similarly, four phase stereo takes the quantization one step further; -it allows only in-phase and 180 degree out-out-phase signals:

    - -

    four phase

    - -

    example: point stereo

    - -

    Point stereo eliminates the possibility of out-of-phase signal -entirely. Any diffuse quality to a sound source tends to collapse -inward to a point somewhere within the stereo image. A practical -example would be balanced reverberations within a large, live space; -normally the sound is diffuse and soft, giving a sonic impression of -volume. In point-stereo, the reverberations would still exist, but -sound fairly firmly centered within the image (assuming the -reverberation was centered overall; if the reverberation is stronger -to the left, then the point of localization in point stereo would be -to the left). This effect is most noticeable at low and mid -frequencies and using headphones (which grant perfect stereo -separation). Point stereo is is a graceful but generally easy to -detect degradation to the sound quality and is thus used in frequency -ranges where it is least noticeable.

    - -

    Mixed Stereo

    - -

    Mixed stereo is the simultaneous use of more than one of the above -stereo encoding models, generally using more aggressive modes in -higher frequencies, lower amplitudes or 'nearly' in-phase sound.

    - -

    It is also the case that near-DC frequencies should be encoded using -lossless coupling to avoid frame blocking artifacts.

    - -

    Vorbis Stereo Modes

    - -

    Vorbis, as of 1.0, uses lossless stereo and a number of mixed modes -constructed out of lossless and point stereo. Phase stereo was used -in the rc2 encoder, but is not currently used for simplicity's sake. It -will likely be re-added to the stereo model in the future.

    - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/stream.png b/ExternalLibs/libvorbis-1.3.1/doc/stream.png deleted file mode 100644 index d1d2f36..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/stream.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/v-comment.html b/ExternalLibs/libvorbis-1.3.1/doc/v-comment.html deleted file mode 100644 index a0390a0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/v-comment.html +++ /dev/null @@ -1,285 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis I format specification: comment field and header specification

    - -

    Overview

    - -

    The Vorbis text comment header is the second (of three) header -packets that begin a Vorbis bitstream. It is meant for short, text -comments, not arbitrary metadata; arbitrary metadata belongs in a -separate logical bitstream (usually an XML stream type) that provides -greater structure and machine parseability.

    - -

    The comment field is meant to be used much like someone jotting a -quick note on the bottom of a CDR. It should be a little information to -remember the disc by and explain it to others; a short, to-the-point -text note that need not only be a couple words, but isn't going to be -more than a short paragraph. The essentials, in other words, whatever -they turn out to be, eg:

    - -

    -"Honest Bob and the Factory-to-Dealer-Incentives, _I'm Still Around_, -opening for Moxy Früvous, 1997" -

    - -

    Comment encoding

    - -

    Structure

    - -

    The comment header logically is a list of eight-bit-clean vectors; the -number of vectors is bounded to 2^32-1 and the length of each vector -is limited to 2^32-1 bytes. The vector length is encoded; the vector -contents themselves are not null terminated. In addition to the vector -list, there is a single vector for vendor name (also 8 bit clean, -length encoded in 32 bits). For example, the 1.0 release of libvorbis -set the vendor string to "Xiph.Org libVorbis I 20020717".

    - -

    The comment header is decoded as follows:

    - -
    -  1) [vendor_length] = read an unsigned integer of 32 bits
-  2) [vendor_string] = read a UTF-8 vector as [vendor_length] octets
-  3) [user_comment_list_length] = read an unsigned integer of 32 bits
-  4) iterate [user_comment_list_length] times {
-
-       5) [length] = read an unsigned integer of 32 bits
-       6) this iteration's user comment = read a UTF-8 vector as [length] octets
-
-     }
-
-  7) [framing_bit] = read a single bit as boolean
-  8) if ( [framing_bit] unset or end of packet ) then ERROR
-  9) done.
-
    - -

    Content vector format

    - -

    The comment vectors are structured similarly to a UNIX environment variable. -That is, comment fields consist of a field name and a corresponding value and -look like:

    - -
    -comment[0]="ARTIST=me"; 
-comment[1]="TITLE=the sound of Vorbis"; 
-
    - -
      -
    • A case-insensitive field name that may consist of ASCII 0x20 through -0x7D, 0x3D ('=') excluded. ASCII 0x41 through 0x5A inclusive (A-Z) is -to be considered equivalent to ASCII 0x61 through 0x7A inclusive -(a-z).
      • -
    • The field name is immediately followed by ASCII 0x3D ('='); -this equals sign is used to terminate the field name.
      • -
    • 0x3D is followed by the 8 bit clean UTF-8 encoded value of the -field contents to the end of the field.
      • -
    - -

    Field names

    - -

    Below is a proposed, minimal list of standard field names with a -description of intended use. No single or group of field names is -mandatory; a comment header may contain one, all or none of the names -in this list.

    - -
    - -
    TITLE
    -
    Track/Work name
    - -
    VERSION
    -
    The version field may be used to differentiate multiple -versions of the same track title in a single collection. -(e.g. remix info)
    - -
    ALBUM
    -
    The collection name to which this track belongs
    - -
    TRACKNUMBER
    -
    The track number of this piece if part of a specific larger collection or album
    - -
    ARTIST
    -
    The artist generally considered responsible for the work. In popular music -this is usually the performing band or singer. For classical music it would be -the composer. For an audio book it would be the author of the original text.
    - -
    PERFORMER
    -
    The artist(s) who performed the work. In classical music this would be the -conductor, orchestra, soloists. In an audio book it would be the actor who did -the reading. In popular music this is typically the same as the ARTIST and -is omitted.
    - -
    COPYRIGHT
    -
    Copyright attribution, e.g., '2001 Nobody's Band' or '1999 Jack Moffitt'
    - -
    LICENSE
    -
    License information, eg, 'All Rights Reserved', 'Any -Use Permitted', a URL to a license such as a Creative Commons license -("www.creativecommons.org/blahblah/license.html") or the EFF Open -Audio License ('distributed under the terms of the Open Audio -License. see http://www.eff.org/IP/Open_licenses/eff_oal.html for -details'), etc.
    - -
    ORGANIZATION
    -
    Name of the organization producing the track (i.e. -the 'record label')
    - -
    DESCRIPTION
    -
    A short text description of the contents
    - -
    GENRE
    -
    A short text indication of music genre
    - -
    DATE
    -
    Date the track was recorded
    - -
    LOCATION
    -
    Location where track was recorded
    - -
    CONTACT
    -
    Contact information for the creators or distributors of the track. -This could be a URL, an email address, the physical address of -the producing label.
    - -
    ISRC
    -
    ISRC number for the track; see the -ISRC intro page for more information on ISRC numbers.
    - -
    - -

    Implications

    - -
      -
    • Field names should not be 'internationalized'; this is a -concession to simplicity not an attempt to exclude the majority of -the world that doesn't speak English. Field contents, -however, use the UTF-8 character encoding to allow easy representation -of any language.
      • -
    • We have the length of the entirety of the field and restrictions on -the field name so that the field name is bounded in a known way. Thus -we also have the length of the field contents.
      • -
    • Individual 'vendors' may use non-standard field names within -reason. The proper use of comment fields should be clear through -context at this point. Abuse will be discouraged.
      • -
    • There is no vendor-specific prefix to 'nonstandard' field names. -Vendors should make some effort to avoid arbitrarily polluting the -common namespace. We will generally collect the more useful tags -here to help with standardization.
      • -
    • Field names are not required to be unique (occur once) within a -comment header. As an example, assume a track was recorded by three -well know artists; the following is permissible, and encouraged: -
      -              ARTIST=Dizzy Gillespie 
-              ARTIST=Sonny Rollins 
-              ARTIST=Sonny Stitt 
-
      • -
    - -

    Encoding

    - -

    The comment header comprises the entirety of the second bitstream -header packet. Unlike the first bitstream header packet, it is not -generally the only packet on the second page and may not be restricted -to within the second bitstream page. The length of the comment header -packet is (practically) unbounded. The comment header packet is not -optional; it must be present in the bitstream even if it is -effectively empty.

    - -

    The comment header is encoded as follows (as per Ogg's standard -bitstream mapping which renders least-significant-bit of the word to be -coded into the least significant available bit of the current -bitstream octet first):

    - -
      -
    1. Vendor string length (32 bit unsigned quantity specifying number of octets)
      2. -
    2. Vendor string ([vendor string length] octets coded from beginning of string -to end of string, not null terminated)
      3. -
    3. Number of comment fields (32 bit unsigned quantity specifying number of fields)
      4. -
    4. Comment field 0 length (if [Number of comment fields]>0; 32 bit unsigned -quantity specifying number of octets)
      5. -
    5. Comment field 0 ([Comment field 0 length] octets coded from beginning of -string to end of string, not null terminated)
      6. -
    6. Comment field 1 length (if [Number of comment fields]>1...)...
      7. -
    - -

    This is actually somewhat easier to describe in code; implementation of the above -can be found in vorbis/lib/info.c:_vorbis_pack_comment(),_vorbis_unpack_comment()

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-clip.txt b/ExternalLibs/libvorbis-1.3.1/doc/vorbis-clip.txt deleted file mode 100644 index 2e67034..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-clip.txt +++ /dev/null @@ -1,139 +0,0 @@ -Topic: - -Sample granularity editing of a Vorbis file; inferred arbitrary sample -length starting offsets / PCM stream lengths - -Overview: - -Vorbis, like mp3, is a frame-based* audio compression where audio is -broken up into discrete short time segments. These segments are -'atomic' that is, one must recover the entire short time segment from -the frame packet; there's no way to recover only a part of the PCM time -segment from part of the coded packet without expanding the entire -packet and then discarding a portion of the resulting PCM audio. - -* In mp3, the data segment representing a given time period is called - a 'frame'; the roughly equivalent Vorbis construct is a 'packet'. - -Thus, when we edit a Vorbis stream, the finest physical editing -granularity is on these packet boundaries (the mp3 case is -actually somewhat more complex and mp3 editing is more complicated -than just snipping on a frame boundary because time data can be spread -backward or forward over frames. In Vorbis, packets are all -stand-alone). Thus, at the physical packet level, Vorbis is still -limited to streams that contain an integral number of packets. - -However, Vorbis streams may still exactly represent and be edited to a -PCM stream of arbitrary length and starting offset without padding the -beginning or end of the decoded stream or requiring that the desired -edit points be packet aligned. Vorbis makes use of Ogg stream -framing, and this framing provides time-stamping data, called a -'granule position'; our starting offset and finished stream length may -be inferred from correct usage of the granule position data. - -Time stamping mechanism: - -Vorbis packets are bundled into into Ogg pages (note that pages do not -necessarily contain integral numbers of packets, but that isn't -inportant in this discussion. More about Ogg framing can be found in -ogg/doc/framing.html). Each page that contains a packet boundary is -stamped with the absolute sample-granularity offset of the data, that -is, 'complete samples-to-date' up to the last completed packet of that -page. (The same mechanism is used for eg, video, where the number -represents complete 2-D frames, and so on). - -(It's possible but rare for a packet to span more than two pages such -that page[s] in the middle have no packet boundary; these packets have -a granule position of '-1'.) - -This granule position mechaism in Ogg is used by Vorbis to indicate when the -PCM data intended to be represented in a Vorbis segment begins a -number of samples into the data represented by the first packet[s] -and/or ends before the physical PCM data represented in the last -packet[s]. - -File length a non-integral number of frames: - -A file to be encoded in Vorbis will probably not encode into an -integral number of packets; such a file is encoded with the last -packet containing 'extra'* samples. These samples are not padding; they -will be discarded in decode. - -*(For best results, the encoder should use extra samples that preserve -the character of the last frame. Simply setting them to zero will -introduce a 'cliff' that's hard to encode, resulting in spread-frame -noise. Libvorbis extrapolates the last frame past the end of data to -produce the extra samples. Even simply duplicating the last value is -better than clamping the signal to zero). - -The encoder indicates to the decoder that the file is actually shorter -than all of the samples ('original' + 'extra') by setting the granule -position in the last page to a short value, that is, the last -timestamp is the original length of the file discarding extra samples. -The decoder will see that the number of samples it has decoded in the -last page is too many; it is 'original' + 'extra', where the -granulepos says that through the last packet we only have 'original' -number of samples. The decoder then ignores the 'extra' samples. -This behavior is to occur only when the end-of-stream bit is set in -the page (indicating last page of the logical stream). - -Note that it not legal for the granule position of the last page to -indicate that there are more samples in the file than actually exist, -however, implementations should handle such an illegal file gracefully -in the interests of robust programming. - -Beginning point not on integral packet boundary: - -It is possible that we will the PCM data represented by a Vorbis -stream to begin at a position later than where the decoded PCM data -really begins after an integral packet boundary, a situation analagous -to the above description where the PCM data does not end at an -integral packet boundary. The easiest example is taking a clip out of -a larger Vorbis stream, and choosing a beginning point of the clip -that is not on a packet boundary; we need to ignore a few samples to -get the desired beginning point. - -The process of marking the desired beginning point is similar to -marking an arbitrary ending point. If the encoder wishes sample zero -to be some location past the actual beginning of data, it associates a -'short' granule position value with the completion of the second* -audio packet. The granule position is associated with the second -packet simply by making sure the second packet completes its page. - -*(We associate the short value with the second packet for two reasons. - a) The first packet only primes the overlap/add buffer. No data is - returned before decoding the second packet; this places the decision - information at the point of decision. b) Placing the short value on - the first packet would make the value negative (as the first packet - normally represents position zero); a negative value would break the - requirement that granule positions increase; the headers have - position values of zero) - -The decoder sees that on the first page that will return -data from the overlap/add queue, we have more samples than the granule -position accounts for, and discards the 'surplus' from the beginning -of the queue. - -Note that short granule values (indicating less than the actually -returned about of data) are not legal in the Vorbis spec outside of -indicating beginning and ending sample positions. However, decoders -should, at minimum, tolerate inadvertant short values elsewhere in the -stream (just as they should tolerate out-of-order/non-increasing -granulepos values, although this too is illegal). - -Beginning point at arbitrary positive timestamp (no 'zero' sample): - -It's also possible that the granule position of the first page of an -audio stream is a 'long value', that is, a value larger than the -amount of PCM audio decoded. This implies only that we are starting -playback at some point into the logical stream, a potentially common -occurence in streaming applications where the decoder may be -connecting into a live stream. The decoder should not treat the long -value specially. - -A long value elsewhere in the stream would normally occur only when a -page is lost or out of sequence, as indicated by the page's sequence -number. A long value under any other situation is not legal, however -a decoder should tolerate both possibilities. - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-errors.txt b/ExternalLibs/libvorbis-1.3.1/doc/vorbis-errors.txt deleted file mode 100644 index e873d8a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-errors.txt +++ /dev/null @@ -1,103 +0,0 @@ -Error return codes possible from libvorbis and libvorbisfile: - -All 'failure' style returns are <0; this either indicates a generic -'false' value (eg, ready? T or F) or an error condition. Code can -safely just test for < 0, or look at the specific return code for more -detail. - -*** Return codes: - -OV_FALSE The call returned a 'false' status (eg, ov_bitrate_instant - can return OV_FALSE if playback is not in progress, and thus - there is no instantaneous bitrate information to report. - -OV_HOLE libvorbis/libvorbisfile is alerting the application that - there was an interruption in the data (one of: garbage - between pages, loss of sync followed by recapture, or a - corrupt page) - -OV_EREAD A read from media returned an error. - -OV_EFAULT Internal logic fault; indicates a bug or heap/stack - corruption. - -OV_EIMPL The bitstream makes use of a feature not implemented in this - library version. - -OV_EINVAL Invalid argument value. - -OV_ENOTVORBIS Bitstream/page/packet is not Vorbis data. - -OV_EBADHEADER Invalid Vorbis bitstream header. - -OV_EVERSION Vorbis version mismatch. - -OV_ENOTAUDIO Packet data submitted to vorbis_synthesis is not audio data. - -OV_EBADPACKET Invalid packet submitted to vorbis_synthesis. - -OV_EBADLINK Invalid stream section supplied to libvorbis/libvorbisfile, - or the requested link is corrupt. - -OV_ENOSEEK Bitstream is not seekable. - - -**************************************************************** -*** Libvorbis functions that can return failure/error codes: - -int vorbis_analysis_headerout() - OV_EIMPL - -int vorbis_analysis_wrote() - OV_EINVAL - -int vorbis_synthesis_headerin() - OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER - -int vorbis_synthesis() - OV_ENOTAUDIO, OV_EBADPACKET - -int vorbis_synthesis_read() - OV_EINVAL - -**************************************************************** -*** Libvorbisfile functions that can return failure/error codes: - -int ov_open_callbacks() - OV_EREAD, OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER, OV_FAULT - -int ov_open() - OV_EREAD, OV_ENOTVORBIS, OV_EVERSION, OV_EBADHEADER, OV_FAULT - -long ov_bitrate() - OV_EINVAL, OV_FALSE - -long ov_bitrate_instant() - OV_FALSE - -ogg_int64_t ov_raw_total() - OV_EINVAL - -ogg_int64_t ov_pcm_total() - OV_EINVAL - -double ov_time_total() - OV_EINVAL - -int ov_raw_seek() - OV_ENOSEEK, OV_EINVAL, OV_BADLINK - -int ov_pcm_seek_page() - OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT - -int ov_pcm_seek() - OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT - -int ov_time_seek() - OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT - -int ov_time_seek_page() - OV_ENOSEEK, OV_EINVAL, OV_EREAD, OV_BADLINK, OV_FAULT - -long ov_read() - OV_HOLE, OV_EBADLINK diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-fidelity.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbis-fidelity.html deleted file mode 100644 index c62f355..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbis-fidelity.html +++ /dev/null @@ -1,180 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis: Fidelity measurement and terminology discussion

    - -

    Terminology discussed in this document is based on common terminology -associated with contemporary codecs such as MPEG I audio layer 3 -(mp3). However, some differences in terminology are useful in the -context of Vorbis as Vorbis functions somewhat differently than most -current formats. For clarity, then, we describe a common terminology -for discussion of Vorbis's and other formats' audio quality.

    - -

    Subjective and Objective

    - -

    Objective fidelity is a measure, based on a computable, -mechanical metric, of how carefully an output matches an input. For -example, a stereo amplifier may claim to introduce less that .01% -total harmonic distortion when amplifying an input signal; this claim -is easy to verify given proper equipment, and any number of testers are -likely to arrive at the same, exact results. One need not listen to -the equipment to make this measurement.

    - -

    However, given two amplifiers with identical, verifiable objective -specifications, listeners may strongly prefer the sound quality of one -over the other. This is actually the case in the decades old debate -[some would say jihad] among audiophiles involving vacuum tube versus -solid state amplifiers. There are people who can tell the difference, -and strongly prefer one over the other despite seemingly identical, -measurable quality. This preference is subjective and -difficult to measure but nonetheless real.

    - -

    Individual elements of subjective differences often can be qualified, -but overall subjective quality generally is not measurable. Different -observers are likely to disagree on the exact results of a subjective -test as each observer's perspective differs. When measuring -subjective qualities, the best one can hope for is average, empirical -results that show statistical significance across a group.

    - -

    Perceptual codecs are most concerned with subjective, not objective, -quality. This is why evaluating a perceptual codec via distortion -measures and sonograms alone is useless; these objective measures may -provide insight into the quality or functioning of a codec, but cannot -answer the much squishier subjective question, "Does it sound -good?". The tube amplifier example is perhaps not the best as very few -people can hear, or care to hear, the minute differences between tubes -and transistors, whereas the subjective differences in perceptual -codecs tend to be quite large even when objective differences are -not.

    - -

    Fidelity, Artifacts and Differences

    - -

    Audio artifacts and loss of fidelity or more simply -put, audio differences are not the same thing.

    - -

    A loss of fidelity implies differences between the perceived input and -output signal; it does not necessarily imply that the differences in -output are displeasing or that the output sounds poor (although this -is often the case). Tube amplifiers are not higher fidelity -than modern solid state and digital systems. They simply produce a -form of distortion and coloring that is either unnoticeable or actually -pleasing to many ears.

    - -

    As compared to an original signal using hard metrics, all perceptual -codecs [ASPEC, ATRAC, MP3, WMA, AAC, TwinVQ, AC3 and Vorbis included] -lose objective fidelity in order to reduce bitrate. This is fact. The -idea is to lose fidelity in ways that cannot be perceived. However, -most current streaming applications demand bitrates lower than what -can be achieved by sacrificing only objective fidelity; this is also -fact, despite whatever various company press releases might claim. -Subjective fidelity eventually must suffer in one way or another.

    - -

    The goal is to choose the best possible tradeoff such that the -fidelity loss is graceful and not obviously noticeable. Most listeners -of FM radio do not realize how much lower fidelity that medium is as -compared to compact discs or DAT. However, when compared directly to -source material, the difference is obvious. A cassette tape is lower -fidelity still, and yet the degradation, relatively speaking, is -graceful and generally easy not to notice. Compare this graceful loss -of quality to an average 44.1kHz stereo mp3 encoded at 80 or 96kbps. -The mp3 might actually be higher objective fidelity but subjectively -sounds much worse.

    - -

    Thus, when a CODEC must sacrifice subjective quality in order -to satisfy a user's requirements, the result should be a -difference that is generally either difficult to notice -without comparison, or easy to ignore. An artifact, on the -other hand, is an element introduced into the output that is -immediately noticeable, obviously foreign, and undesired. The famous -'underwater' or 'twinkling' effect synonymous with low bitrate (or -poorly encoded) mp3 is an example of an artifact. This -working definition differs slightly from common usage, but the coined -distinction between differences and artifacts is useful for our -discussion.

    - -

    The goal, when it is absolutely necessary to sacrifice subjective -fidelity, is obviously to strive for differences and not artifacts. -The vast majority of codecs today fail at this task miserably, -predictably, and regularly in one way or another. Avoiding such -failures when it is necessary to sacrifice subjective quality is a -fundamental design objective of Vorbis and that objective is reflected -in Vorbis's design and tuning.

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbis.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbis.html deleted file mode 100644 index 66df2f4..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbis.html +++ /dev/null @@ -1,234 +0,0 @@ - - - - - -Ogg Vorbis Documentation - - - - - - - - - -

    Ogg Vorbis encoding format documentation

    - -

    waitAs of writing, not all the below document -links are live. They will be populated as we complete the documents.

    - -

    Documents

    - - - - - - - - - -

    Description

    - -

    Ogg Vorbis is a general purpose compressed audio format -for high quality (44.1-48.0kHz, 16+ bit, polyphonic) audio and music -at moderate fixed and variable bitrates (40-80 kb/s/channel). This -places Vorbis in the same class as audio representations including -MPEG-1 audio layer 3, MPEG-4 audio (AAC and TwinVQ), and PAC.

    - -

    Vorbis is the first of a planned family of Ogg multimedia coding -formats being developed as part of the Xiph.org Foundation's Ogg multimedia -project. See http://www.xiph.org/ -for more information.

    - -

    Vorbis technical documents

    - -

    A Vorbis encoder takes in overlapping (but contiguous) short-time -segments of audio data. The encoder analyzes the content of the audio -to determine an optimal compact representation; this phase of encoding -is known as analysis. For each short-time block of sound, -the encoder then packs an efficient representation of the signal, as -determined by analysis, into a raw packet much smaller than the size -required by the original signal; this phase is coding. -Lastly, in a streaming environment, the raw packets are then -structured into a continuous stream of octets; this last phase is -streaming. Note that the stream of octets is referred to both -as a 'byte-' and 'bit-'stream; the latter usage is acceptible as the -stream of octets is a physical representation of a true logical -bit-by-bit stream.

    - -

    A Vorbis decoder performs a mirror image process of extracting the -original sequence of raw packets from an Ogg stream (stream -decomposition), reconstructing the signal representation from the -raw data in the packet (decoding) and them reconstituting an -audio signal from the decoded representation (synthesis).

    - -

    The Programming with libvorbis -documents discuss use of the reference Vorbis codec library -(libvorbis) produced by the Xiph.org Foundation.

    - -

    The data representations and algorithms necessary at each step to -encode and decode Ogg Vorbis bitstreams are described by the below -documents in sufficient detail to construct a complete Vorbis codec. -Note that at the time of writing, Vorbis is still in a 'Request For -Comments' stage of development; despite being in advanced stages of -development, input from the multimedia community is welcome.

    - -

    Vorbis analysis and synthesis

    - -

    Analysis begins by seperating an input audio stream into individual, -overlapping short-time segments of audio data. These segments are -then transformed into an alternate representation, seeking to -represent the original signal in a more efficient form that codes into -a smaller number of bytes. The analysis and transformation stage is -the most complex element of producing a Vorbis bitstream.

    - -

    The corresponding synthesis step in the decoder is simpler; there is -no analysis to perform, merely a mechanical, deterministic -reconstruction of the original audio data from the transform-domain -representation.

    - -
      -
    • Vorbis packet structure: -Describes the basic analysis components necessary to produce Vorbis -packets and the structure of the packet itself.
      • -
    • Temporal envelope shaping and blocksize: -Use of temporal envelope shaping and variable blocksize to minimize -time-domain energy leakage during wide dynamic range and spectral energy -swings. Also discusses time-related principles of psychoacoustics.
      • -
    • Time domain segmentation and MDCT transform: -Division of time domain data into individual overlapped, windowed -short-time vectors and transformation using the MDCT
      • -
    • The resolution floor: Use of frequency -doamin psychoacoustics, and the MDCT-domain noise, masking and resolution -floors
      • -
    • MDCT-domain fine structure: Production, -quantization and massaging of MDCT-spectrum fine structure
      • -
    - -

    Vorbis coding and decoding

    - -

    Coding and decoding converts the transform-domain representation of -the original audio produced by analysis to and from a bitwise packed -raw data packet. Coding and decoding consist of two logically -orthogonal concepts, back-end coding and bitpacking.

    - -

    Back-end coding uses a probability model to represent the raw numbers -of the audio representation in as few physical bits as possible; -familiar examples of back-end coding include Huffman coding and Vector -Quantization.

    - -

    Bitpacking arranges the variable sized words of the back-end -coding into a vector of octets without wasting space. The octets -produced by coding a single short-time audio segment is one raw Vorbis -packet.

    - - - -

    Vorbis streaming and stream decomposition

    - -

    Vorbis packets contain the raw, bitwise-compressed representation of a -snippet of audio. These packets contain no structure and cannot be -strung together directly into a stream; for streamed transmission and -storage, Vorbis packets are encoded into an Ogg bitstream.

    - -
      -
    • Ogg bitstream overview: High-level -description of Ogg logical bitstreams, how logical bitstreams -(of mixed media types) can be combined into physical bitstreams, and -restrictions on logical-to-physical mapping. Note that this document is -not specific only to Ogg Vorbis.
      • -
    • Ogg logical bitstream and framing -spec: Low level, complete specification of Ogg logical -bitstream pages. Note that this document is not specific only to Ogg -Vorbis.
      • -
    • Vorbis bitstream mapping: -Specifically describes mapping Vorbis data into an -Ogg physical bitstream.
      • -
    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.am b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.am deleted file mode 100644 index f7eb4a9..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.am +++ /dev/null @@ -1,11 +0,0 @@ -## Process this file with automake to produce Makefile.in - -docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)/vorbisenc - -doc_DATA = changes.html examples.html index.html ov_ectl_ratemanage2_arg.html \ - ov_ectl_ratemanage_arg.html overview.html reference.html style.css\ - vorbis_encode_ctl.html vorbis_encode_init.html vorbis_encode_setup_init.html \ - vorbis_encode_setup_managed.html vorbis_encode_setup_vbr.html vorbis_info.html \ - vorbis_encode_init_vbr.html - -EXTRA_DIST = $(doc_DATA) diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.in b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.in deleted file mode 100644 index 54ed6fb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/Makefile.in +++ /dev/null @@ -1,393 +0,0 @@ -# Makefile.in generated by automake 1.10.2 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. -# This Makefile.in is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -@SET_MAKE@ - -VPATH = @srcdir@ -pkgdatadir = $(datadir)/@PACKAGE@ -pkglibdir = $(libdir)/@PACKAGE@ -pkgincludedir = $(includedir)/@PACKAGE@ -am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd -install_sh_DATA = $(install_sh) -c -m 644 -install_sh_PROGRAM = $(install_sh) -c -install_sh_SCRIPT = $(install_sh) -c -INSTALL_HEADER = $(INSTALL_DATA) -transform = $(program_transform_name) -NORMAL_INSTALL = : -PRE_INSTALL = : -POST_INSTALL = : -NORMAL_UNINSTALL = : -PRE_UNINSTALL = : -POST_UNINSTALL = : -build_triplet = @build@ -host_triplet = @host@ -target_triplet = @target@ -subdir = doc/vorbisenc -DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in -ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 -am__aclocal_m4_deps = $(top_srcdir)/m4/add_cflags.m4 \ - $(top_srcdir)/m4/ogg.m4 $(top_srcdir)/m4/pkg.m4 \ - $(top_srcdir)/configure.ac -am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ - $(ACLOCAL_M4) -mkinstalldirs = $(install_sh) -d -CONFIG_HEADER = $(top_builddir)/config.h -CONFIG_CLEAN_FILES = -SOURCES = -DIST_SOURCES = -am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`; 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    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    Libvorbisenc API changes 1.0 through 1.1

    - -This document describes API additions to libvorbisenc between release -1.0 and 1.1. - -

    1.0.1

    - -The programming API and binary application ABI are unchanged and fully -forward/backward compatible between release 1.0 and 1.0.1. Libvorbis, -libvorbisenc and libvorbisfile must match versions amongst themselves, -however. - -

    1.1

    - -The binary ABI from release 1.0.1 to 1.1 is backward compatible; -applications linked against libvorbis/libvorbisenc 1.0 and 1.0.1 will -continue to function correctly when upgrading the libvorbis and -libvorbisenc dynamic libraries without re-linking.

    - -Release 1.1 adds several possible requests to the libvorbisenc vorbis_encode_ctl() call in order to -reflect the shift to bit-reservoir style -bitrate management. In addition, several vorbis_encode_ctl() requests are -deprecated (but functional) as they are redered semantically obsolete -by the new bitrate management.

    - -

    Deprecated in 1.1

    - -These calls are still available to older codebases to preserve -compatability; the fields of the ovectl_ratemanage_arg argument -are mapped as closely as possible to the fields of the new ovectl_ratemanage2_arg -structure. - -
    -
    OV_ECTL_RATEMANAGE_GET:
    Use OV_ECTL_RATEMANAGE2_GET -instead. - - -
    OV_ECTL_RATEMANAGE_SET:
    Use OV_ECTL_RATEMANAGE2_SET -instead. - -
    OV_ECTL_RATEMANAGE_AVG:
    Use OV_ECTL_RATEMANAGE2_SET -instead. - -
    OV_ECTL_RATEMANAGE_HARD:
    Use OV_ECTL_RATEMANAGE2_SET -instead. -
    - -

    Newly added in 1.1

    - -The following calls are added in 1.1 to semantically reflect movement -to a bit-reservoir-based bitrate -management scheme by introducing the ovectl_ratemanage2_arg -structure in order to better represent the abilities of the bitrate -manager.

    - -

    -
    OV_ECTL_RATEMANAGE2_GET
    - -Used to query the current state of bitrate management setup. - -
    OV_ECTL_RATEMANAGE2_SET
    - -Used to set or alter bitrate management settings. -
    - -

    -
    - - - - - - - - -

    copyright © 2000-2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/examples.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/examples.html deleted file mode 100644 index 75f50ff..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/examples.html +++ /dev/null @@ -1,133 +0,0 @@ - - - -libvorbisenc - Documentation - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    Libvorbisenc Setup Examples

    - -VBR is always the recommended mode for Vorbis encoding when -there's no need to impose bitrate constraints. True VBR encoding will -always produce the most consistent quality output as well as the -highest quality for a the bits used. - -

    The following code examples prepare a -vorbis_info structure for encoding -use with libvorbis.

    - -

    Example: encoding using a VBR quality mode

    - - -
     
-   vorbis_info_init(&vi);
-
-  /*********************************************************************
-   Encoding using a VBR quality mode.  The usable range is -.1
-   (lowest quality, smallest file) to 1.0 (highest quality, largest file).
-   Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR 
-   *********************************************************************/
-  
-   ret = vorbis_encode_init_vbr(&vi,2,44100,.4);
-
-  /*********************************************************************
-   do not continue if setup failed; this can happen if we ask for a
-   mode that libVorbis does not support (eg, too low a quality mode, etc,
-   will return 'OV_EIMPL')
-   *********************************************************************/
-
-   if(ret) exit(1);
-
    - -

    Example: encoding using average bitrate (ABR)

    - - -
     
-   vorbis_info_init(&vi);
-
-  /*********************************************************************
-   Encoding using an average bitrate mode (ABR).
-   example: 44kHz stereo coupled, average 128kbps ABR 
-   *********************************************************************/
-  
-   ret = vorbis_encode_init(&vi,2,44100,-1,128000,-1);
-
-  /*********************************************************************
-   do not continue if setup failed; this can happen if we ask for a
-   mode that libVorbis does not support (eg, too low a bitrate, etc,
-   will return 'OV_EIMPL')
-   *********************************************************************/
-
-   if(ret) exit(1);
-
    - -

    Example: encoding using constant bitrate (CBR)

    - - -
     
-   vorbis_info_init(&vi);
-
-  /*********************************************************************
-   Encoding using a constant bitrate mode (CBR).
-   example: 44kHz stereo coupled, average 128kbps CBR 
-   *********************************************************************/
-  
-   ret = vorbis_encode_init(&vi,2,44100,128000,128000,128000);
-
-  /*********************************************************************
-   do not continue if setup failed; this can happen if we ask for a
-   mode that libVorbis does not support (eg, too low a bitrate, etc,
-   will return 'OV_EIMPL')
-   *********************************************************************/
-
-   if(ret) exit(1);
-
    - -

    Example: encoding using VBR selected by approximate bitrate

    - - -
     
-   vorbis_info_init(&vi);
-
-  /*********************************************************************
-   Encode using a quality mode, but select that quality mode by asking for
-   an approximate bitrate.  This is not ABR, it is true VBR, but selected
-   using the bitrate interface, and then turning bitrate management off:
-   *********************************************************************/
-
-   ret = ( vorbis_encode_setup_managed(&vi,2,44100,-1,128000,-1) ||
-           vorbis_encode_ctl(&vi,OV_ECTL_RATEMANAGE2_SET,NULL) ||
-           vorbis_encode_setup_init(&vi));
-
-  /*********************************************************************
-   do not continue if setup failed; this can happen if we ask for a
-   mode that libVorbis does not support (eg, too low a bitrate, etc,
-   will return 'OV_EIMPL')
-   *********************************************************************/
-
-   if(ret) exit(1);
-
    - -

    -
    - - - - - - - - -

    copyright © 2000-2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/index.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/index.html deleted file mode 100644 index 3ee3595..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/index.html +++ /dev/null @@ -1,40 +0,0 @@ - - - -libvorbisenc - Documentation - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    Libvorbisenc Documentation

    - -

    -Libvorbisenc is a convenient API for setting up an encoding environment using libvorbis. Libvorbisenc encapsulates the actions needed to set up the encoder properly. -

    -libvorbisenc api overview
    -libvorbisenc api reference
    -libvorbisenc api changes from 1.0 and 1.0.1
    -libvorbisenc encode setup examples
    - -

    -

    - - - - - - - - -

    copyright © 2000-2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage2_arg.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage2_arg.html deleted file mode 100644 index a9f7207..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage2_arg.html +++ /dev/null @@ -1,92 +0,0 @@ - - - -vorbis - datatype - ov_ectl_ratemanage2_arg - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    ov_ectl_ratemanage2_arg

    - -

    declared in "vorbis/vorbisenc.h"

    - -

    - -The ov_ectl_ratemanage2_arg structure is used with vorbis_encode_ctl() and the OV_ECTL_RATEMANAGE2_GET and -OV_ECTL_RATEMANAGE2_SET calls in order to query and modify specifics -of the encoder's bitrate management configuration. - -

    - - - - - -
    -
    struct ovectl_ratemanage2_arg {
-  int    management_active;
-
-  long   bitrate_limit_min_kbps;
-  long   bitrate_limit_max_kbps;
-  long   bitrate_limit_reservoir_bits;
-  double bitrate_limit_reservoir_bias;
-
-  long   bitrate_average_kbps;
-  double bitrate_average_damping;
-};
    -
    - -

    Relevant Struct Members

    -
    -
    management_active
    -
    nonzero if bitrate management is active
    - -
    bitrate_limit_min_kbps
    -
    Lower allowed bitrate limit in kilobits per second
    -
    bitrate_limit_max_kbps
    -
    Upper allowed bitrate limit in kilobits per second
    -
    bitrate_limit_reservoir_bits
    -
    Size of the bitrate reservoir in bits
    -
    bitrate_limit_reservoir_bias
    - -
    Regulates the bitrate reservoir's preferred fill level in a range -from 0.0 to 1.0; 0.0 tries to bank bits to buffer against future -bitrate spikes, 1.0 buffers against future sudden drops in -instantaneous bitrate. Default is 0.1
    - -
    bitrate_average_kbps
    -
    Average bitrate setting in kilobits per second
    - -
    bitrate_average_damping
    Slew rate limit setting -for average bitrate adjustment; sets the minimum time in seconds the -bitrate tracker may swing from one extreme to the other when boosting -or damping average bitrate.
    - - - -
    - - -

    -
    - - - - - - - - -

    copyright © 2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    vorbisfile documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage_arg.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage_arg.html deleted file mode 100644 index 332f0b7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/ov_ectl_ratemanage_arg.html +++ /dev/null @@ -1,92 +0,0 @@ - - - -vorbis - datatype - ov_ectl_ratemanage_arg - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    ov_ectl_ratemanage_arg

    - -

    declared in "vorbis/vorbisenc.h"

    - -

    - -The ov_ectl_ratemanage_arg structure is used with vorbis_encode_ctl() and the OV_ECTL_RATEMANAGE_GET, -OV_ECTL_RATEMANAGE_SET, OV_ECTL_RATEMANAGE_AVG, -OV_ECTL_RATEMANAGE_HARD calls in order to query and modify specifics -of the encoder's bitrate management configuration. Note that this is -a deprecated interface; please use vorbis_encode_ctl() with the ov_ectl_ratemanage2_arg struct -and OV_ECTL_RATEMANAGE2_GET and OV_ECTL_RATEMANAGE2_SET calls in new -code. - -

    - - - - - -
    -
    struct ovectl_ratemanage_arg {
-  int    management_active;
-
-  long   bitrate_hard_min;
-  long   bitrate_hard_max;
-  double bitrate_hard_window;
-
-  long   bitrate_av_lo;
-  long   bitrate_av_hi;
-  double bitrate_av_window;
-  double bitrate_av_window_center;
-};
    -
    - -

    Relevant Struct Members

    -
    - -
    management_active
    -
    nonzero if bitrate management is active
    - -
    bitrate_hard_min
    -
    hard lower limit (in kilobits per second) below which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.
    -
    bitrate_hard_max
    -
    hard upper limit (in kilobits per second) above which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.
    -
    bitrate_hard_window
    -
    the window period (in seconds) used to regulate the hard bitrate minimum and maximum
    - -
    bitrate_av_lo
    -
    soft lower limit (in kilobits per second) below which the average bitrate tracker will start nudging the bitrate higher.
    -
    bitrate_av_hi
    -
    soft upper limit (in kilobits per second) above which the average bitrate tracker will start nudging the bitrate lower.
    -
    bitrate_av_window
    -
    the window period (in seconds) used to regulate the average bitrate minimum and maximum.
    -
    bitrate_av_window_center
    -
    Regulates the relative centering of the average and hard windows; in libvorbis 1.0 and 1.0.1, the hard window regulation overlapped but followed the average window regulation. In libvorbis 1.1 a bit-reservoir interface replaces the old windowing interface; the older windowing interface is simulated and this field has no effect.
    - -
    - - -

    -
    - - - - - - - - -

    copyright © 2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    vorbisfile documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/overview.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/overview.html deleted file mode 100644 index 284245d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/overview.html +++ /dev/null @@ -1,382 +0,0 @@ - - - -libvorbisenc - API Overview - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    Libvorbisenc API Overview

    - -

    Libvorbisenc is an encoding convenience library intended to -encapsulate the elaborate setup that libvorbis requires for encoding. -Libvorbisenc gives easy access to all high-level adjustments an -application may require when encoding and also exposes some low-level -tuning parameters to allow applications to make detailed adjustments -to the encoding process.

    - -All the libvorbisenc routines are declared in "vorbis/vorbisenc.h". - -Note: libvorbis and libvorbisenc always -encode in a single pass. Thus, all possible encoding setups will work -properly with live input and produce streams that decode properly when -streamed. See the subsection titled "managed bitrate -modes" for details on setting limits on bitrate usage when Vorbis -streams are used in a limited-bandwidth environment. - -

    workflow

    - -

    Libvorbisenc is used only during encoder setup; its function -is to automate initialization of a multitude of settings in a -vorbis_info structure which libvorbis then uses as a reference -during the encoding process. Libvorbisenc plays no part in the -encoding process after setup. - -

    Encode setup using libvorbisenc consists of three steps: - -

      -
    1. high-level initialization of a vorbis_info structure by -calling one of vorbis_encode_setup_vbr() or vorbis_encode_setup_managed() -with the basic input audio parameters (rate and channels) and the -basic desired encoded audio output parameters (VBR quality or ABR/CBR -bitrate)

      - -

    2. optional adjustment of the basic setup defaults using vorbis_encode_ctl()

      - -

    3. calling vorbis_encode_setup_init() to -finalize the high-level setup into the detailed low-level reference -values needed by libvorbis to encode audio. The vorbis_info -structure is then ready to use for encoding by libvorbis.

      - -

    - -These three steps can be collapsed into a single call by using vorbis_encode_init_vbr to set up a -quality-based VBR stream or vorbis_encode_init to set up a managed -bitrate (ABR or CBR) stream.

    - -

    adjustable encoding parameters

    - -

    input audio parameters

    - -

    - - - - - - - - - - - - - -
    parameterdescription
    sampling rate -The sampling rate (in samples per second) of the input audio. Common examples are 8000 for telephony, 44100 for CD audio and 48000 for DAT. Note that a mono sample (one center value) and a stereo sample (one left value and one right value) both are a single sample. - -
    channels - -The number of channels encoded in each input sample. By default, -stereo input modes (two channels) are 'coupled' by Vorbis 1.1 such -that the stereo relationship between the samples is taken into account -when encoding. Stereo coupling my be disabled by using vorbis_encode_ctl() with OV_ECTL_COUPLE_SET. - -
    - -

    quality and VBR modes

    - -Vorbis is natively a VBR codec; a user requests a given constant -quality and the encoder keeps the encoding quality constant -while allowing the bitrate to vary. 'Quality' modes (Variable BitRate) -will always produce the most consistent encoding results as well as -the highest quality for the amount of bits used. - -

    - - - - - - - - - -
    parameterdescription
    quality -A decimal float value requesting a desired quality. Libvorbisenc 1.1 allows quality requests in the range of -0.1 (lowest quality, smallest files) through +1.0 (highest-quality, largest files). Quality -0.1 is intended as an ultra-low setting in which low bitrate is much more important than quality consistency. Quality settings 0.0 and above are intended to produce consistent results at all times. - -
    - - -

    managed bitrate modes

    - -Although the Vorbis codec is natively VBR, libvorbis includes -infrastructure for 'managing' the bitrate of streams by setting -minimum and maximum usage constraints, as well as functionality for -nudging a stream toward a desired average value. These features -should only be used when there is a requirement to limit -bitrate in some way. Although the difference is usually slight, -managed bitrate modes will always produce output inferior to VBR -(given equal bitrate usage). Setting overly or impossibly tight -bitrate management requirements can affect output quality dramatically -for the worse.

    - -Beginning in libvorbis 1.1, bitrate management is implemented using a -bit-reservoir algorithm. The encoder has a fixed-size -reservoir used as a 'savings account' in encoding. When a frame is -smaller than the target rate, the unused bits go into the reservoir so -that they may be used by future frames. When a frame is larger than -target bitrate, it draws 'banked' bits out of the reservoir. Encoding -is managed so that the reservoir never goes negative (when a maximum -bitrate is specified) or fills beyond a fixed limit (when a minimum -bitrate is specified). An 'average bitrate' request is used as the -set-point in a long-range bitrate tracker which adjusts the encoder's -aggressiveness up or down depending on whether or not frames are coming -in larger or smaller than the requested average point. - -

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    parameterdescription
    maximum bitrate The maximum allowed bitrate, set in bits -per second. If the bitrate would otherwise rise such that oversized -frames would underflow the bit-reservoir by consuming banked bits, -bitrate management will force the encoder to use fewer bits per frame -by encoding with a more aggressive psychoacoustic model.

    This -setting is a hard limit; the bitstream will never be allowed, under -any circumstances, to increase above the specified bitrate over the -average period set by the reservoir; it may momentarily rise over if -inspected on a granularity much finer than the average period across -the reservoir. Normally, the encoder will conserve bits gracefully by -using more aggressive psychoacoustics to shrink a frame when forced -to. However, if the encoder runs out of means of gracefully shrinking -a frame, it will simply take the smallest frame it can otherwise -generate and truncate it to the maximum allowed length. Note that -this is not an error and although it will obviously adversely affect -audio quality, a Vorbis decoder will be able to decode a truncated -frame into audio. - -

    average bitrate - -The average desired bitrate of a stream, set -in bits per second. Average bitrate is tracked via a reservoir like -minimum and maximum bitrate, however the averaging reservior does not -impose a hard limit; it is used to nudge the bitrate toward the -desired average by slowly adjusting the psychoacoustic aggressiveness. -As such, the reservoir size does not affect the average bitrate -behavior. Because this setting alone is not used to impose hard -bitrate limits, the bitrate of a stream produced using only the -average bitrate constraint will track the average over time -but not necessarily adhere strictly to that average for any given -period. Should a strict localized average be required, average -bitrate should be used along with minimum bitrate and -maximum bitrate. -
    minimum bitrate - The minimum allowed bitrate, set in bits per second. If -the bitrate would otherwise fall such that undersized frames would -overflow the bit-reservoir with unused bits, bitrate management will -force the encoder to use more bits per frame by encoding with a less -aggressive psychoacoustic model.

    This setting is a hard limit; the -bitstream will never be allowed, under any circumstances, to drop -below the specified bitrate over the average period set by the -reservoir; it may momentarily fall under if inspected on a granularity -much finer than the average period across the reservoir. Normally, -the encoder will fill out undersided frames with additional useful -coding information by increasing the perceived quality of the stream. -If the encoder runs out of useful ways to consume more bits, it will -pad frames out with zeroes. -

    reservoir size The size of the minimum/maximum bitrate -tracking reservoir, set in bits. The reservoir is used as a 'bit -bank' to average out localized surges and dips in bitrate while -providing predictable, guaranteed buffering behavior for streams to be -used in situations with constrained transport bandwidth. The default -setting is two seconds of average bitrate.

    - -When a single frame is larger than the maximum allowed overall -bitrate, the bits are 'borrowed' from the bitrate reservoir; if the -reservoir contains insufficient bits to cover the defecit, the encoder -must find some way to reduce the frame size.

    - -When a frame is under the minimum limit, the surplus bits are placed -into the reservoir, banking them for future use. If the reservoir is -already full of banked bits, the encoder is forced to find some way to -make the frame larger.

    - -If the frame size is between the minimum and maximum rates (thus -implying the minimum and maximum allowed rates are different), the -reservoir gravitates toward a fill point configured by the -reservoir bias setting described next. If the reservoir is -fuller than the fill point (a 'surplus of surplus'), the encoder will -consume a number bits from the reservoir equal to the number of the -bits by which the frame exceeds minimum size. If the reservoir is -emptier than the fillpoint (a 'surplus of defecit'), bits are returned -to the reservoir equaling the current frame's number of bits under the -maximum frame size. The idea of the fill point is to buffer against -both underruns and overruns, by trying to hold the reservoir to a -middle course. -

    reservoir bias - -Reservoir bias is a setting between 0.0 and 1.0 that biases bitrate -management toward smoothing bitrate spikes (0.0) or bitrate peaks -(1.0); the default setting is 0.1.

    - -Using settings toward 0.0 causes the bitrate manager to hoard bits in -the bit reservoir such that there is a large pool of banked surplus to -draw upon during short spikes in bitrate. As a result, the encoder -will react less aggressively and less drastically to curtail framesize -during brief surges in bitrate.

    - -Using settings toward 1.0 causes the bitrate manager to empty the bit -reservoir such that there is a large buffer available to store surplus -bits during sudden drops in bitrate. As a result, the encoder will -react less aggressively and less drastically to support minimum frame -sizes during drops in bitrate and will tend not to store any extra -bits in the reservoir for future bitrate spikes.

    - -

    average track damping - -A decimal value, in seconds, that controls how quickly the average -bitrate tracker is allowed to slew from enforcing minimum frame sizes -to maximum framesizes and vice versa. Default value is 1.5 -seconds.

    - -When the 'average bitrate' setting is in use, the average bitrate -tracker uses an unbounded reservoir to track overall bitrate-to-date -in the stream. When bitrates are too low, the tracker will try to -nudge bitrates up and when the bitrate is too high, nudge it down. -The damping value regulates the maximum strength of the nudge; it -describes, in seconds, how quickly the tracker may transition from an -extreme nudge in one direction to an extreme nudge in the other.

    - -

    - -

    encoding model adjustments

    - -The     vorbis_encode_ctl() call provides -a generalized interface for making encoding setup adjustments to the -basic high-level setup provided by vorbis_encode_setup_vbr() or vorbis_encode_setup_managed(). -In reality, these two calls use vorbis_encode_ctl() internally, and vorbis_encode_ctl() can be used to adjust -most of the parameters set by other calls.

    - -In Vorbis 1.1, vorbis_encode_ctl() can -adjust the following additional parameters not described elsewhere: - -

    - - - - - - - - - - - - - - - - - - - - -
    parameterdescription
    management mode Configures whether or not bitrate -management is in use or not. Normally, this value is set implicitly -during encoding setup; however, the supported means of selecting a -quality mode by bitrate (that is, requesting a true VBR stream, but -doing so by asking for an approximate bitrate) is to use vorbis_encode_setup_managed() -and then to explicitly turn off bitrate management by calling vorbis_encode_ctl() with OV_ECTL_RATEMANAGE2_SET -
    coupling Stereo encoding (and in the future, surround -encodings) are normally encoded assuming the channels form a stereo -image and that lossy-stereo modelling is appropriate; this is called -'coupling'. Stereo coupling may be explicitly enabled or disabled. -
    lowpass Sets the hard lowpass of a given encoding mode; -this may be used to conserve a few bits in high-rate audio that has -limited bandwidth, or in testing of the encoder's acoustic model. The -encoder is generally already configured with ideal lowpasses (if any -at all) for given modes; use of this parameter is strongly discouraged -if the point is to try to 'improve' a given encoding mode for general -encoding. -
    impulse coding aggressiveness By default, libvorbis -attempts to compromise between preventing wide bitrate swings and -high-resolution impulse coding (which is required for the crispest -possible attacks, but also requires a relatively large momentary -bitrate increase). This parameter allows an application to tune the -compromise or eliminate it; A value of 0.0 indicates normal behavior -while a value of -15.0 requests maximum possible impulse -resolution.
    - - -

    -

    - - - - - - - - -

    copyright © 2004 Vorbis team

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/reference.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/reference.html deleted file mode 100644 index 9bda280..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/reference.html +++ /dev/null @@ -1,74 +0,0 @@ - - - -Vorbisfile API Reference - - - - - - - - - -

    vorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    Vorbisenc API Reference

    - -

    Data Structures

    - -

    -vorbis_info
    -ov_ectl_ratemanage_arg
    -ov_ectl_ratemanage2_arg
    -

    - -

    Encoder Setup

    - -

    -vorbis_encode_ctl()
    -vorbis_encode_init()
    -vorbis_encode_init_vbr()
    -vorbis_encode_setup_init()
    -vorbis_encode_setup_managed()
    -vorbis_encode_setup_vbr()
    -

    - -

    Encoding

    - -

    -vorbis_analysis_init()
    -vorbis_block_init()
    -

    - -

    -vorbis_analysis_headerout()
    -

    - -

    -vorbis_analysis_buffer()
    -vorbis_analysis_wrote()
    -vorbis_analysis_blockout()
    -

    -

    -vorbis_analysis()
    -vorbis_bitrate_addblock()
    -vorbis_bitrate_flushpacket()
    -

    - -
    -
    -
    - - - - - - - - -

    copyright © 2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc release 1.1 - 20040709

    vorbisenc version 1.1

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/style.css b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/style.css deleted file mode 100644 index 81cf417..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/style.css +++ /dev/null @@ -1,7 +0,0 @@ -BODY { font-family: Helvetica, sans-serif } -TD { font-family: Helvetica, sans-serif } -P { font-family: Helvetica, sans-serif } -H1 { font-family: Helvetica, sans-serif } -H2 { font-family: Helvetica, sans-serif } -H4 { font-family: Helvetica, sans-serif } -P.tiny { font-size: 8pt } diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_ctl.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_ctl.html deleted file mode 100644 index ca337da..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_ctl.html +++ /dev/null @@ -1,183 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_ctl - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_ctl

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This function implements a generic interface to miscellaneous -encoder settings similar to the clasasic UNIX 'ioctl()' system call. -Applications may use vorbis_encode_ctl() to query or set bitrate -management or quality mode details by using one of several -request arguments detailed below. Vorbis_encode_ctl() must be -called after one of vorbis_encode_setup_managed() -or vorbis_encode_setup_vbr(). -When used to modify settings, vorbis_encode_ctl() must be called -before vorbis_encode_setup_init(). - -

    -

    - - - - -
    -
    
-extern int vorbis_encode_ctl(vorbis_info *vi,int request,void *arg);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.

    -

    request
    -
    Specifies the desired action; possible request fields are detailed below.

    -

    arg
    -
    void * pointing to a data structure matching the request argument.

    -

    - -

    Requests

    -
    - -
    OV_ECTL_RATEMANAGE2_GET
    - -
    Argument: struct -ovectl_ratemanage2_arg *
    Used to query the current -encoder bitrate management setting. Also used to initialize fields of -an ovectl_ratemanage2_arg structure for use with -OV_ECTL_RATEMANAGE2_SET.

    - -

    OV_ECTL_RATEMANAGE2_SET
    -
    Argument: struct -ovectl_ratemanage2_arg *
    Used to set the current -encoder bitrate management settings to the values listed in the -ovectl_ratemanage2_arg. Passing a NULL pointer will disable bitrate -management. -

    - -

    OV_ECTL_LOWPASS_GET
    -
    Argument: double *
    Returns the current encoder hard-lowpass -setting (kHz) in the double pointed to by arg. -

    - -

    OV_ECTL_LOWPASS_SET
    -
    Argument: double *
    Sets the encoder hard-lowpass to the value -(kHz) pointed to by arg. Valid lowpass settings range from 2 to 99. -

    - -

    OV_ECTL_IBLOCK_GET
    -
    Argument: double *
    Returns the current encoder impulse -block setting in the double pointed to by arg.

    - -

    OV_ECTL_IBLOCK_SET
    Argument: double *
    Sets -the impulse block bias to the the value pointed to by arg; valid range -is -15.0 to 0.0 [default]. A negative impulse block bias will direct -to encoder to use more bits when incoding short blocks that contain -strong impulses, thus improving the accuracy of impulse encoding.

    - -

    OV_ECTL_COUPLING_GET
    -
    Argument: int *
    -Returns the current encoder coupling enabled/disabled -setting in the int pointed to by arg. -

    - -

    OV_ECTL_COUPLING_SET
    -
    Argument: int *
    -Enables/disables channel coupling in multichannel encoding according to arg. -*arg of zero disables all channel coupling, nonzero allows the encoder to use -coupling if a coupled mode is available for the input. At present, coupling -is available for stereo and 5.1 input modes. -

    - -

    OV_ECTL_RATEMANAGE_GET [deprecated]
    -
    - -Argument: struct -ovectl_ratemanage_arg *
    Old interface to querying bitrate -management settings; deprecated after move to bit-reservoir style -management in 1.1 rendered this interface partially obsolete. Please -use OV_ECTL_RATEMANGE2_GET instead. - -

    - -

    OV_ECTL_RATEMANAGE_SET [deprecated]
    -
    -Argument: struct -ovectl_ratemanage_arg *
    Old interface to modifying bitrate -management settings; deprecated after move to bit-reservoir style -management in 1.1 rendered this interface partially obsolete. Please -use OV_ECTL_RATEMANGE2_SET instead. -

    - -

    OV_ECTL_RATEMANAGE_AVG [deprecated]
    -
    -Argument: struct -ovectl_ratemanage_arg *
    Old interface to setting -average-bitrate encoding mode; deprecated after move to bit-reservoir -style management in 1.1 rendered this interface partially obsolete. -Please use OV_ECTL_RATEMANGE2_SET instead. -

    - -

    OV_ECTL_RATEMANAGE_HARD [deprecated]
    -
    -Argument: struct -ovectl_ratemanage_arg *
    Old interface to setting -bounded-bitrate encoding modes; deprecated after move to bit-reservoir -style management in 1.1 rendered this interface partially obsolete. -Please use OV_ECTL_RATEMANGE2_SET instead. -

    - - -

    - - -

    Return Values

    vorbis_encode_ctl() returns zero on success, -placing any further return information (such as the result of a query) -into the storage pointed to by *arg. On error, -vorbis_encode_ctl() may return one of the following error codes: - -
    - -
    OV_EINVAL
    Invalid argument, or an attempt to modify a -setting after calling vorbis_encode_setup_init().

    - -

    OV_EIMPL
    Unimplemented or unknown request

    - -

    - -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init.html deleted file mode 100644 index f279775..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init.html +++ /dev/null @@ -1,88 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_init - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_init

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This is the primary function within libvorbisenc for setting up managed bitrate modes. -

    Before this function is called, the vorbis_info struct should be initialized by using vorbis_info_init() from the libvorbis API. After encoding, vorbis_info_clear should be called. -

    The max_bitrate, nominal_bitrate, and min_bitrate settings are used to set constraints for the encoded file. This function uses these settings to select the appropriate encoding mode and set it up. -

    -

    - - - - -
    -
    
-extern int vorbis_encode_init(vorbis_info *vi,
-			      long channels,
-			      long rate,
-			      
-			      long max_bitrate,
-			      long nominal_bitrate,
-			      long min_bitrate);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.
    -
    channels
    -
    The number of channels to be encoded.
    -
    rate
    -
    The sampling rate of the source audio.
    -
    max_bitrate
    -
    Desired maximum bitrate (limit). -1 indicates unset.
    -
    nominal_bitrate
    -
    Desired average, or central, bitrate. -1 indicates unset.
    -
    min_bitrate
    -
    Desired minimum bitrate. -1 indicates unset.
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    • OV_EINVAL - Invalid setup request, eg, out of range argument.
      • -
    • OV_EIMPL - Unimplemented mode; unable to comply with bitrate request.
      • -
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init_vbr.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init_vbr.html deleted file mode 100644 index 92f9a23..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_init_vbr.html +++ /dev/null @@ -1,81 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_init_vbr - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_init_vbr

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This is the primary function within libvorbisenc for setting up variable bitrate ("quality" based) modes. -

    Before this function is called, the vorbis_info struct should be initialized by using vorbis_info_init() from the libvorbis API. After encoding, vorbis_info_clear should be called. -

    -

    - - - - -
    -
    
-extern int vorbis_encode_init_vbr(vorbis_info *vi,
-			      long channels,
-			      long rate,
-			      
-			      float base_quality);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.
    -
    channels
    -
    The number of channels to be encoded.
    -
    rate
    -
    The sampling rate of the source audio.
    -
    base_quality
    -
    Desired quality level, currently from -0.1 to 1.0 (lo to hi).
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    • OV_EINVAL - Invalid setup request, eg, out of range argument.
      • -
    • OV_EIMPL - Unimplemented mode; unable to comply with quality level request.
      • -
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_init.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_init.html deleted file mode 100644 index 7d18655..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_init.html +++ /dev/null @@ -1,88 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_setup_init - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_setup_init

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This function performs the last stage of three-step encoding setup, as described in the API overview under managed bitrate modes. - -

    Before this function is called, the vorbis_info struct should be initialized -by using vorbis_info_init() from the libvorbis API, one of vorbis_encode_setup_managed() -or vorbis_encode_setup_vbr() -called to initialize the high-level encoding setup, and vorbis_encode_ctl() called if -necessary to make encoding setup changes. vorbis_encode_setup_init() -finalizes the highlevel encoding structure into a complete encoding -setup after which the application may make no further setup changes.

    - -After encoding, vorbis_info_clear should be called. -

    -

    - - - - -
    -
    
-extern int vorbis_encode_setup_init(vorbis_info *vi);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    • OV_EINVAL - Attempt to use vorbis_encode_setup_init() without first calling one of vorbis_encode_setup_managed() -or vorbis_encode_setup_vbr() -to initialize the high-level encoding setup -
      • -
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_managed.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_managed.html deleted file mode 100644 index 6e8d8c7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_managed.html +++ /dev/null @@ -1,102 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_setup_managed - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_setup_managed

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This function performs step-one of a three-step bitrate-managed -encode setup. It functions similarly to the one-step setup performed -by vorbis_encode_init() but -allows an application to make further encode setup tweaks using vorbis_encode_ctl() before finally -calling vorbis_encode_setup_init() to -complete the setup process. - -

    Before this function is called, the vorbis_info struct should be initialized -by using vorbis_info_init() from the libvorbis API. After encoding, -vorbis_info_clear should be called. - -

    The max_bitrate, nominal_bitrate, and min_bitrate settings are used -to set constraints for the encoded file. This function uses these -settings to select the appropriate encoding mode and set it up. -

    -

    - - - - -
    -
    
-extern int vorbis_encode_init(vorbis_info *vi,
-			      long channels,
-			      long rate,
-			      
-			      long max_bitrate,
-			      long nominal_bitrate,
-			      long min_bitrate);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.
    -
    channels
    -
    The number of channels to be encoded.
    -
    rate
    -
    The sampling rate of the source audio.
    -
    max_bitrate
    -
    Desired maximum bitrate (limit). -1 indicates unset.
    -
    nominal_bitrate
    -
    Desired average, or central, bitrate. -1 indicates unset.
    -
    min_bitrate
    -
    Desired minimum bitrate. -1 indicates unset.
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    • OV_EINVAL - Invalid setup request, eg, out of range argument.
      • -
    • OV_EIMPL - Unimplemented mode; unable to comply with bitrate request.
      • -
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_vbr.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_vbr.html deleted file mode 100644 index 6c9a698..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_encode_setup_vbr.html +++ /dev/null @@ -1,90 +0,0 @@ - - - -libvorbisenc - function - vorbis_encode_setup_vbr - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_encode_setup_vbr

    - -

    declared in "vorbis/vorbisenc.h";

    - -

    This function performs step-one of a three-step variable bitrate -(quality-based) encode setup. It functions similarly to the one-step -setup performed by vorbis_encode_init_vbr() but -allows an application to make further encode setup tweaks using vorbis_encode_ctl() before finally -calling vorbis_encode_setup_init() to -complete the setup process. - -

    Before this function is called, the vorbis_info struct should be initialized by using vorbis_info_init() from the libvorbis API. After encoding, vorbis_info_clear should be called. -

    -

    - - - - -
    -
    
-extern int vorbis_encode_init_vbr(vorbis_info *vi,
-			      long channels,
-			      long rate,
-			      
-			      float base_quality);
-
-
    -
    - -

    Parameters

    -
    -
    vi
    -
    Pointer to an initialized vorbis_info struct.
    -
    channels
    -
    The number of channels to be encoded.
    -
    rate
    -
    The sampling rate of the source audio.
    -
    base_quality
    -
    Desired quality level, currently from -0.1 to 1.0 (lo to hi).
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    • OV_EINVAL - Invalid setup request, eg, out of range argument.
      • -
    • OV_EIMPL - Unimplemented mode; unable to comply with quality level request.
      • -
    -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2004 xiph.org

    Ogg Vorbis
    team@vorbis.org

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_info.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_info.html deleted file mode 100644 index 99d2bbe..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisenc/vorbis_info.html +++ /dev/null @@ -1,81 +0,0 @@ - - - -vorbis - datatype - vorbis_info - - - - - - - - - -

    libvorbisenc documentation

    libvorbisenc release 1.1 - 20040709

    - -

    vorbis_info

    - -

    declared in "vorbis/codec.h"

    - -

    -The vorbis_info structure contains information about a vorbis bitstream. - -

    - - - - - -
    -
    typedef struct vorbis_info{
-  int version;
-  int channels;
-  long rate;
-  
-  long bitrate_upper;
-  long bitrate_nominal;
-  long bitrate_lower;
-  long bitrate_window;
-
-  void *codec_setup;
-
-} vorbis_info;
    -
    - -

    Relevant Struct Members

    -
    -
    version
    -
    Vorbis encoder version used to create this bitstream.
    -
    channels
    -
    Int signifying number of channels in bitstream.
    -
    rate
    -
    Sampling rate of the bitstream.
    -
    bitrate_upper
    -
    Specifies the upper limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_lower parameters, the stream is fixed bitrate. May be unset if no limit exists.
    -
    bitrate_nominal
    -
    Specifies the average bitrate for a VBR bitstream. May be unset. If the bitrate_upper and bitrate_lower parameters match, the stream is fixed bitrate.
    -
    bitrate_lower
    -
    Specifies the lower limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_upper parameters, the stream is fixed bitrate. May be unset if no limit exists.
    -
    bitrate_window
    -
    Specifies the size of the bit reservoir in seconds relative to the nominal bitrate. May be unset.
    -
    codec_setup
    -
    Pointer to private encoder setup state.
    - -
    - - -

    -
    - - - - - - - - -

    copyright © 2004 vorbis team

    Ogg Vorbis
    team@vorbis.org

    vorbisfile documentation

    libvorbisenc release 1.1 - 20040709

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.am b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.am deleted file mode 100644 index 26977e0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.am +++ /dev/null @@ -1,24 +0,0 @@ -## Process this file with automake to produce Makefile.in - -docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)/vorbisfile - -doc_DATA = OggVorbis_File.html callbacks.html chaining_example_c.html\ - chainingexample.html crosslap.html datastructures.html decoding.html\ - example.html exampleindex.html fileinfo.html index.html\ - initialization.html ov_bitrate.html ov_bitrate_instant.html\ - ov_callbacks.html ov_clear.html ov_comment.html ov_crosslap.html\ - ov_fopen.html\ - ov_info.html ov_open.html ov_open_callbacks.html ov_pcm_seek.html\ - ov_pcm_seek_lap.html ov_pcm_seek_page.html ov_pcm_seek_page_lap.html\ - ov_pcm_tell.html ov_pcm_total.html ov_raw_seek.html\ - ov_raw_seek_lap.html ov_raw_tell.html ov_raw_total.html ov_read.html\ - ov_read_float.html ov_seekable.html ov_serialnumber.html\ - ov_streams.html ov_test.html ov_test_callbacks.html ov_test_open.html\ - ov_time_seek.html ov_time_seek_lap.html ov_time_seek_page.html\ - ov_time_seek_page_lap.html ov_time_tell.html ov_time_total.html\ - overview.html reference.html return.html seekexample.html seeking.html\ - seeking_example_c.html seeking_test_c.html seekingexample.html\ - style.css threads.html vorbis_comment.html vorbis_info.html\ - vorbisfile_example_c.html - -EXTRA_DIST = $(doc_DATA) diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.in b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.in deleted file mode 100644 index b9cf38a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/Makefile.in +++ /dev/null @@ -1,406 +0,0 @@ -# Makefile.in generated by automake 1.10.2 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. -# This Makefile.in is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -@SET_MAKE@ - -VPATH = @srcdir@ -pkgdatadir = $(datadir)/@PACKAGE@ -pkglibdir = $(libdir)/@PACKAGE@ -pkgincludedir = $(includedir)/@PACKAGE@ -am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd -install_sh_DATA = $(install_sh) -c -m 644 -install_sh_PROGRAM = $(install_sh) -c -install_sh_SCRIPT = $(install_sh) -c -INSTALL_HEADER = $(INSTALL_DATA) -transform = $(program_transform_name) -NORMAL_INSTALL = : -PRE_INSTALL = : -POST_INSTALL = : -NORMAL_UNINSTALL = : -PRE_UNINSTALL = : -POST_UNINSTALL = : -build_triplet = @build@ -host_triplet = @host@ -target_triplet = @target@ -subdir = doc/vorbisfile -DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in -ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 -am__aclocal_m4_deps = $(top_srcdir)/m4/add_cflags.m4 \ - $(top_srcdir)/m4/ogg.m4 $(top_srcdir)/m4/pkg.m4 \ - 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chainingexample.html crosslap.html datastructures.html decoding.html\ - example.html exampleindex.html fileinfo.html index.html\ - initialization.html ov_bitrate.html ov_bitrate_instant.html\ - ov_callbacks.html ov_clear.html ov_comment.html ov_crosslap.html\ - ov_fopen.html\ - ov_info.html ov_open.html ov_open_callbacks.html ov_pcm_seek.html\ - ov_pcm_seek_lap.html ov_pcm_seek_page.html ov_pcm_seek_page_lap.html\ - ov_pcm_tell.html ov_pcm_total.html ov_raw_seek.html\ - ov_raw_seek_lap.html ov_raw_tell.html ov_raw_total.html ov_read.html\ - ov_read_float.html ov_seekable.html ov_serialnumber.html\ - ov_streams.html ov_test.html ov_test_callbacks.html ov_test_open.html\ - ov_time_seek.html ov_time_seek_lap.html ov_time_seek_page.html\ - ov_time_seek_page_lap.html ov_time_tell.html ov_time_total.html\ - overview.html reference.html return.html seekexample.html seeking.html\ - seeking_example_c.html seeking_test_c.html seekingexample.html\ - style.css threads.html vorbis_comment.html vorbis_info.html\ - 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install-pdf install-pdf-am install-ps install-ps-am \ - install-strip installcheck installcheck-am installdirs \ - maintainer-clean maintainer-clean-generic mostlyclean \ - mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ - uninstall uninstall-am uninstall-docDATA - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/OggVorbis_File.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/OggVorbis_File.html deleted file mode 100644 index de23ae0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/OggVorbis_File.html +++ /dev/null @@ -1,137 +0,0 @@ - - - -Vorbisfile - datatype - OggVorbis_File - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    OggVorbis_File

    - -

    declared in "vorbis/vorbisfile.h"

    - -

    -The OggVorbis_File structure defines an Ogg Vorbis file. -

    - -This structure is used in all libvorbisfile routines. Before it can -be used, it must be initialized by ov_open(), ov_fopen(), or ov_open_callbacks(). Important -Note: The use of ov_open() is -discouraged under Windows due to a peculiarity of Windows linking -convention; use ov_fopen() or ov_open_callbacks() instead. This -caution only applies to Windows; use of ov_open() is appropriate for all other -platforms. See the ov_open() page for more -information. - -

    -After use, the OggVorbis_File structure must be deallocated with a -call to ov_clear(). - -

    -Note that once a file handle is passed to a successful ov_open() call, the handle is owned by -libvorbisfile and will be closed by libvorbisfile later during the -call to ov_clear(). The handle should not -be used or closed outside of the libvorbisfile API. Similarly, files -opened by ov_fopen() will also be closed -internally by vorbisfile in ov_clear().

    - -ov_open_callbacks() allows the -application to choose whether libvorbisfile will or will not close the -handle in ov_clear(); see the ov_open_callbacks() page for more information.

    - -If a call to ov_open() or ov_open_callbacks() fails, -libvorbisfile does not assume ownership of the handle and the -application is expected to close it if necessary. A failed ov_fopen() call will internally close the -file handle if the open process fails.

    - -

    - - - - -
    -
    typedef struct {
-  void             *datasource; /* Pointer to a FILE *, etc. */
-  int              seekable;
-  ogg_int64_t      offset;
-  ogg_int64_t      end;
-  ogg_sync_state   oy; 
-
-  /* If the FILE handle isn't seekable (eg, a pipe), only the current
-     stream appears */
-  int              links;
-  ogg_int64_t      *offsets;
-  ogg_int64_t      *dataoffsets;
-  long             *serialnos;
-  ogg_int64_t      *pcmlengths;
-  vorbis_info      *vi;
-  vorbis_comment   *vc;
-
-  /* Decoding working state local storage */
-  ogg_int64_t      pcm_offset;
-  int              ready_state;
-  long             current_serialno;
-  int              current_link;
-
-  ogg_int64_t      bittrack;
-  ogg_int64_t      samptrack;
-
-  ogg_stream_state os; /* take physical pages, weld into a logical
-                          stream of packets */
-  vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
-  vorbis_block     vb; /* local working space for packet->PCM decode */
-
-  ov_callbacks callbacks;
-
-} OggVorbis_File;
    -
    - -

    Relevant Struct Members

    -
    -
    datasource
    - -
    Pointer to file or other ogg source. When using stdio based -file/stream access, this field contains a FILE pointer. When using -custom IO via callbacks, libvorbisfile treats this void pointer as a -black box only to be passed to the callback routines provided by the -application.
    - -
    seekable
    -
    Read-only int indicating whether file is seekable. E.g., a physical file is seekable, a pipe isn't.
    -
    links
    -
    Read-only int indicating the number of logical bitstreams within the physical bitstream.
    -
    ov_callbacks
    -
    Collection of file manipulation routines to be used on this data source. When using stdio/FILE access via ov_open(), the callbacks will be filled in with stdio calls or wrappers to stdio calls.
    -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/callbacks.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/callbacks.html deleted file mode 100644 index 5ed0124..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/callbacks.html +++ /dev/null @@ -1,121 +0,0 @@ - - - -Vorbisfile - Callbacks and non-stdio I/O - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Callbacks and non-stdio I/O

    - -Although stdio is convenient and nearly universally implemented as per -ANSI C, it is not suited to all or even most potential uses of Vorbis. -For additional flexibility, embedded applications may provide their -own I/O functions for use with Vorbisfile when stdio is unavailable or not -suitable. One common example is decoding a Vorbis stream from a -memory buffer.

    - -Use custom I/O functions by populating an ov_callbacks structure and calling ov_open_callbacks() or ov_test_callbacks() rather than the -typical ov_open() or ov_test(). Past the open call, use of -libvorbisfile is identical to using it with stdio. - -

    Read function

    - -The read-like function provided in the read_func field is -used to fetch the requested amount of data. It expects the fetch -operation to function similar to file-access, that is, a multiple read -operations will retrieve contiguous sequential pieces of data, -advancing a position cursor after each read.

    - -The following behaviors are also expected:

    -

      -
    • a return of '0' indicates end-of-data (if the by-thread errno is unset) -
    • short reads mean nothing special (short reads are not treated as error conditions) -
    • a return of zero with the by-thread errno set to nonzero indicates a read error -
    -

    - -

    Seek function

    - -The seek-like function provided in the seek_func field is -used to request non-sequential data access by libvorbisfile, moving -the access cursor to the requested position. The seek function is -optional; if callbacks are only to handle non-seeking (streaming) data -or the application wishes to force streaming behavior, -seek_func and tell_func should be set to NULL. If -the seek function is non-NULL, libvorbisfile mandates the following -behavior: - -
      -
    • The seek function must always return -1 (failure) if the given -data abstraction is not seekable. It may choose to always return -1 -if the application desires libvorbisfile to treat the Vorbis data -strictly as a stream (which makes for a less expensive open -operation).

      - -

    • If the seek function initially indicates seekability, it must -always succeed upon being given a valid seek request.

      - -

    • The seek function must implement all of SEEK_SET, SEEK_CUR and -SEEK_END. The implementation of SEEK_END should set the access cursor -one past the last byte of accessible data, as would stdio -fseek()

      -

    - -

    Close function

    - -The close function should deallocate any access state used by the -passed in instance of the data access abstraction and invalidate the -instance handle. The close function is assumed to succeed; its return -code is not checked.

    - -The close_func may be set to NULL to indicate that libvorbis -should not attempt to close the file/data handle in ov_clear but allow the application to handle -file/data access cleanup itself. For example, by passing the normal -stdio calls as callback functions, but passing a close_func -that is NULL or does nothing (as in the case of OV_CALLBACKS_NOCLOSE), an -application may call ov_clear() and then -later fclose() the file originally passed to libvorbisfile. - -

    Tell function

    - -The tell function is intended to mimic the -behavior of ftell() and must return the byte position of the -next data byte that would be read. If the data access cursor is at -the end of the 'file' (pointing to one past the last byte of data, as -it would be after calling fseek(file,SEEK_END,0)), the tell -function must return the data position (and thus the total file size), -not an error.

    - -The tell function need not be provided if the data IO abstraction is -not seekable, or the application wishes to force streaming -behavior. In this case, the tell_func and seek_func -fields should be set to NULL.

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chaining_example_c.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chaining_example_c.html deleted file mode 100644 index d092b78..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chaining_example_c.html +++ /dev/null @@ -1,90 +0,0 @@ - - - -vorbisfile - chaining_example.c - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    chaining_example.c

    - -

    -The example program source: - -

    - - - - -
    -
    
-
-#include <vorbis/codec.h>
-#include <vorbis/vorbisfile.h>
-
-int main(){
-  OggVorbis_File ov;
-  int i;
-
-#ifdef _WIN32 /* We need to set stdin to binary mode on windows. */
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
-  /* open the file/pipe on stdin */
-  if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
-    printf("Could not open input as an OggVorbis file.\n\n");
-    exit(1);
-  }
-  
-  /* print details about each logical bitstream in the input */
-  if(ov_seekable(&ov)){
-    printf("Input bitstream contained %ld logical bitstream section(s).\n",
-           ov_streams(&ov));
-    printf("Total bitstream playing time: %ld seconds\n\n",
-           (long)ov_time_total(&ov,-1));
-
-  }else{
-    printf("Standard input was not seekable.\n"
-           "First logical bitstream information:\n\n");
-  }
-
-  for(i=0;i<ov_streams(&ov);i++){
-    vorbis_info *vi=ov_info(&ov,i);
-    printf("\tlogical bitstream section %d information:\n",i+1);
-    printf("\t\t%ldHz %d channels bitrate %ldkbps serial number=%ld\n",
-           vi->rate,vi->channels,ov_bitrate(&ov,i)/1000,
-           ov_serialnumber(&ov,i));
-    printf("\t\tcompressed length: %ld bytes ",(long)(ov_raw_total(&ov,i)));
-    printf(" play time: %lds\n",(long)ov_time_total(&ov,i));
-  }
-
-  ov_clear(&ov);
-  return 0;
-}
-
-
    -
    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chainingexample.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chainingexample.html deleted file mode 100644 index e2c313e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/chainingexample.html +++ /dev/null @@ -1,175 +0,0 @@ - - - -vorbisfile - Example Code - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Chaining Example Code

    - -

    -The following is a run-through of the chaining example program supplied -with vorbisfile - chaining_example.c. -This program demonstrates how to work with a chained bitstream. - -

    -First, relevant headers, including vorbis-specific "codec.h" and "vorbisfile.h" have to be included. - -

    - - - - -
    -
    
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-#include "../lib/misc.h"
-
    -
    - -

    Inside main(), we declare our primary OggVorbis_File structure. We also declare a other helpful variables to track our progress within the file. -

    - - - - -
    -
    
-int main(){
-  OggVorbis_File ov;
-  int i;
-
    -
    - -

    This example takes its input on stdin which is in 'text' mode by default under Windows; this will corrupt the input data unless set to binary mode. This applies only to Windows. -

    - - - - -
    -
    
-#ifdef _WIN32 /* We need to set stdin to binary mode under Windows */
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
    -
    - -

    We call ov_open_callbacks() to -initialize the OggVorbis_File -structure. ov_open_callbacks() -also checks to ensure that we're reading Vorbis format and not -something else. The OV_CALLBACKS_NOCLOSE callbacks instruct -libvorbisfile not to close stdin later during cleanup.

    - -

    - - - - -
    -
    
-  if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){
-    printf("Could not open input as an OggVorbis file.\n\n");
-    exit(1);
-  }
-
-
    -
    - -

    -First we check to make sure the stream is seekable using ov_seekable. - -

    Then we're going to find the number of logical bitstreams in the physical bitstream using ov_streams. - -

    We use ov_time_total to determine the total length of the physical bitstream. We specify that we want the entire bitstream by using the argument -1. - -

    - - - - -
    -
    
-  if(ov_seekable(&ov)){
-    printf("Input bitstream contained %ld logical bitstream section(s).\n",
-	   ov_streams(&ov));
-    printf("Total bitstream playing time: %ld seconds\n\n",
-	   (long)ov_time_total(&ov,-1));
-
-  }else{
-    printf("Standard input was not seekable.\n"
-	   "First logical bitstream information:\n\n");
-  }
-  
-
    -
    - -

    Now we're going to iterate through each logical bitstream and print information about that bitstream. - -

    We use ov_info to pull out the vorbis_info struct for each logical bitstream. This struct contains bitstream-specific info. - -

    ov_serialnumber retrieves the unique serial number for the logical bistream. ov_raw_total gives the total compressed bytes for the logical bitstream, and ov_time_total gives the total time in the logical bitstream. - -

    - - - - -
    -
    
-  for(i=0;i<ov_streams(&ov);i++){
-    vorbis_info *vi=ov_info(&ov,i);
-    printf("\tlogical bitstream section %d information:\n",i+1);
-    printf("\t\t%ldHz %d channels bitrate %ldkbps serial number=%ld\n",
-	   vi->rate,vi->channels,ov_bitrate(&ov,i)/1000,
-	   ov_serialnumber(&ov,i));
-    printf("\t\tcompressed length: %ld bytes ",(long)(ov_raw_total(&ov,i)));
-    printf(" play time: %lds\n",(long)ov_time_total(&ov,i));
-  } 
-
    -
    -

    -When we're done with the entire physical bitstream, we need to call ov_clear() to release the bitstream. - -

    - - - - -
    -
    
-  ov_clear(&ov);
-  return 0;
-}
-
    -
    - -

    -The full source for chaining_example.c can be found with the vorbis -distribution in chaining_example.c. - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/crosslap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/crosslap.html deleted file mode 100644 index d998eb2..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/crosslap.html +++ /dev/null @@ -1,121 +0,0 @@ - - - -Vorbisfile - Sample Crosslapping - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    What is Crosslapping?

    - -

    Crosslapping blends two samples together using a window function, -such that any sudden discontinuities between the samples that may -cause clicks or thumps are eliminated or blended away. The technique -is nearly identical to how Vorbis internally splices together frames -of audio data during normal decode. API functions are provided to crosslap transitions between seperate -streams, or to crosslap when seeking within -a single stream. - -

    Why Crosslap?

    -

    The source of boundary clicks

    - -

    Vorbis is a lossy compression format such that any compressed -signal is at best a close approximation of the original. The -approximation may be very good (ie, indistingushable to the human -ear), but it is an approximation nonetheless. Even if a sample or set -of samples is contructed carefully such that transitions from one to -another match perfectly in the original, the compression process -introduces minute amplitude and phase errors. It's an unavoidable -result of such high compression rates. - -

    If an application transitions instantly from one sample to another, -any tiny discrepancy introduced in the lossy compression process -becomes audible as a stairstep discontinuity. Even if the discrepancy -in a normal lapped frame is only .1dB (usually far below the -threshhold of perception), that's a sudden cliff of 380 steps in a 16 -bit sample (when there's a boundary with no lapping). - -

    I thought Vorbis was gapless

    - -

    It is. Vorbis introduces no extra samples at the beginning or end -of a stream, nor does it remove any samples. Gapless encoding -eliminates 99% of the click, pop or outright blown speaker that would -occur if boundaries had gaps or made no effort to align -transitions. However, gapless encoding is not enough to entirely -eliminate stairstep discontinuities all the time for exactly the -reasons described above. - -

    Frame lapping, like Vorbis performs internally during continuous -playback, is necessary to eliminate that last epsilon of trouble. - -

    Easiest Crosslap

    - -The easiest way to perform crosslapping in Vorbis is to use the -lapping functions with no other extra effort. These functions behave -identically to when lapping isn't used except to provide -at-least-very-good lapping results. Crosslapping will not introduce -any samples into or remove any samples from the decoded audio; the -only difference is that the transition is lapped. Lapping occurs from -the current PCM position (either in the old stream, or at the position -prior to calling a lapping seek) forward into the next -half-short-block of audio data to be read from the new stream or -position. - -

    Ideally, vorbisfile internally reads an extra frame of audio from -the old stream/position to perform lapping into the new -stream/position. However, automagic crosslapping works properly even -if the old stream/position is at EOF. In this case, the synthetic -post-extrapolation generated by the encoder to pad out the last block -with appropriate data (and avoid encoding a stairstep, which is -inefficient) is used for crosslapping purposes. Although this is -synthetic data, the result is still usually completely unnoticable -even in careful listening (and always preferable to a click or pop). - -

    Vorbisfile will lap between streams of differing numbers of -channels. Any extra channels from the old stream are ignored; playback -of these channels simply ends. Extra channels in the new stream are -lapped from silence. Vorbisfile will also lap between streams links -of differing sample rates. In this case, the sample rates are ignored -(no implicit resampling is done to match playback). It is up to the -application developer to decide if this behavior makes any sense in a -given context; in practical use, these default behaviors perform -sensibly. - -

    Best Crosslap

    - -

    To acheive the best possible crosslapping results, avoid the case -where synthetic extrapolation data is used for crosslapping. That is, -design loops and samples such that a little bit of data is left over -in sample A when seeking to sample B. Normally, the end of sample A -and the beginning of B would overlap exactly; this allows -crosslapping to perform exactly as it would within vorbis when -stitching audio frames together into continuous decoded audio. - -

    The optimal amount of overlap is half a short-block, and this -varies by compression mode. Each encoder will vary in exact block -size selection; for vorbis 1.0, for -q0 through -q10 and 44kHz or -greater, a half-short block is 64 samples. - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/datastructures.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/datastructures.html deleted file mode 100644 index d3294a3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/datastructures.html +++ /dev/null @@ -1,61 +0,0 @@ - - - -Vorbisfile - Base Data Structures - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Base Data Structures

    -

    There are several data structures used to hold file and bitstream information during libvorbisfile decoding. These structures are declared in "vorbis/vorbisfile.h" and "vorbis/codec.h". -

    -

    When using libvorbisfile, it's not necessary to know about most of the contents of these data structures, but it may be helpful to understand what they contain. -

    - - - - - - - - - - - - - - - - - - - - - - -
    datatypepurpose
    OggVorbis_FileThis structure represents the basic file information. It contains - a pointer to the physical file or bitstream and various information about that bitstream.
    vorbis_commentThis structure contains the file comments. It contains - a pointer to unlimited user comments, information about the number of comments, and a vendor description.
    vorbis_infoThis structure contains encoder-related information about the bitstream. It includes encoder info, channel info, and bitrate limits.
    ov_callbacksThis structure contains pointers to the application-specified file manipulation routines set for use by ov_open_callbacks(). See also the provided document on using application-provided callbacks instead of stdio.
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/decoding.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/decoding.html deleted file mode 100644 index 4a39155..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/decoding.html +++ /dev/null @@ -1,92 +0,0 @@ - - - -Vorbisfile - Decoding - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Decoding

    - -

    -All libvorbisfile decoding routines are declared in "vorbis/vorbisfile.h". -

    - -After initialization, decoding audio -is as simple as calling ov_read() (or the -similar functions ov_read_float() and -ov_read_filter). This function works -similarly to reading from a normal file using read().

    - -However, a few differences are worth noting: - -

    multiple stream links

    - -A Vorbis stream may consist of multiple sections (called links) that -encode differing numbers of channels or sample rates. It is vitally -important to pay attention to the link numbers returned by ov_read and handle audio changes that may -occur at link boundaries. Such multi-section files do exist in the -wild and are not merely a specification curiosity. - -

    returned data amount

    - -ov_read does not attempt to completely fill -a large, passed in data buffer; it merely guarantees that the passed -back data does not overflow the passed in buffer size. Large buffers -may be filled by iteratively looping over calls to ov_read (incrementing the buffer pointer) -until the original buffer is filled. - -

    file cursor position

    - -Vorbis files do not necessarily start at a sample number or time offset -of zero. Do not be surprised if a file begins at a positive offset of -several minutes or hours, such as would happen if a large stream (such -as a concert recording) is chopped into multiple seperate files. - -

    - - - - - - - - - - - - - - - - - -
    functionpurpose
    ov_readThis function makes up the main chunk of a decode loop. It takes an -OggVorbis_File structure, which must have been initialized by a previous -call to ov_open(), ov_fopen(), -or ov_open_callbacks().
    ov_read_floatThis function decodes to floats instead of integer samples.
    ov_read_filterThis function works like ov_read, but passes the PCM data through the provided filter before converting to integer sample data.
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/example.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/example.html deleted file mode 100644 index 4372b98..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/example.html +++ /dev/null @@ -1,208 +0,0 @@ - - - -Vorbisfile - Example Code - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Decoding Example Code

    - -

    -The following is a run-through of the decoding example program supplied -with libvorbisfile, vorbisfile_example.c. -This program takes a vorbis bitstream from stdin and writes raw pcm to stdout. - -

    -First, relevant headers, including vorbis-specific "vorbis/codec.h" and "vorbisfile.h" have to be included. - -

    - - - - -
    -
    
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include "vorbis/codec.h"
-#include "vorbisfile.h"
-
    -
    -

    -We also have to make a concession to Windows users here. If we are using windows for decoding, we must declare these libraries so that we can set stdin/stdout to binary. -

    - - - - -
    -
    
-#ifdef _WIN32
-#include <io.h>
-#include <fcntl.h>
-#endif
-
    -
    -

    -Next, a buffer for the pcm audio output is declared. - -

    - - - - -
    -
    
-char pcmout[4096];
-
    -
    - -

    Inside main(), we declare our primary OggVorbis_File structure. We also declare a few other helpful variables to track out progress within the file. -Also, we make our final concession to Windows users by setting the stdin and stdout to binary mode. -

    - - - - -
    -
    
-int main(int argc, char **argv){
-  OggVorbis_File vf;
-  int eof=0;
-  int current_section;
-
-#ifdef _WIN32
-  _setmode( _fileno( stdin ), _O_BINARY );
-  _setmode( _fileno( stdout ), _O_BINARY );
-#endif
-
    -
    - -

    We call ov_open_callbacks() to -initialize the OggVorbis_File structure with default values. -ov_open_callbacks() also checks -to ensure that we're reading Vorbis format and not something else. The -OV_CALLBACKS_NOCLOSE callbacks instruct libvorbisfile not to close -stdin later during cleanup. - -

    - - - - -
    -
    
-  if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) {
-      fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
-      exit(1);
-  }
-
-
    -
    - -

    -We're going to pull the channel and bitrate info from the file using ov_info() and show them to the user. -We also want to pull out and show the user a comment attached to the file using ov_comment(). - -

    - - - - -
    -
    
-  {
-    char **ptr=ov_comment(&vf,-1)->user_comments;
-    vorbis_info *vi=ov_info(&vf,-1);
-    while(*ptr){
-      fprintf(stderr,"%s\n",*ptr);
-      ++ptr;
-    }
-    fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
-    fprintf(stderr,"\nDecoded length: %ld samples\n",
-            (long)ov_pcm_total(&vf,-1));
-    fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
-  }
-  
-
    -
    - -

    -Here's the read loop: - -

    - - - - -
    -
    
-
-  while(!eof){
-    long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤t_section);
-    if (ret == 0) {
-      /* EOF */
-      eof=1;
-    } else if (ret < 0) {
-      /* error in the stream.  Not a problem, just reporting it in
-	 case we (the app) cares.  In this case, we don't. */
-    } else {
-      /* we don't bother dealing with sample rate changes, etc, but
-	 you'll have to*/
-      fwrite(pcmout,1,ret,stdout);
-    }
-  }
-
-  
-
    -
    - -

    -The code is reading blocks of data using ov_read(). -Based on the value returned, we know if we're at the end of the file or have invalid data. If we have valid data, we write it to the pcm output. - -

    -Now that we've finished playing, we can pack up and go home. It's important to call ov_clear() when we're finished. - -

    - - - - -
    -
    
-
-  ov_clear(&vf);
-    
-  fprintf(stderr,"Done.\n");
-  return(0);
-}
-
    -
    - -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/exampleindex.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/exampleindex.html deleted file mode 100644 index b168664..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/exampleindex.html +++ /dev/null @@ -1,39 +0,0 @@ - - - -vorbisfile - Documentation - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    VorbisFile Example Code

    - -

    -Three sample programs are included with the vorbisfile distribution. -

    -vorbisfile decoding
    -vorbisfile seeking
    -vorbisfile bitstream chaining
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/fileinfo.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/fileinfo.html deleted file mode 100644 index c660dfc..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/fileinfo.html +++ /dev/null @@ -1,95 +0,0 @@ - - - -Vorbisfile - File Information - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    File Information

    -

    Libvorbisfile contains many functions to get information about bitstream attributes and decoding status. -

    -All libvorbisfile file information routines are declared in "vorbis/vorbisfile.h". -

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    functionpurpose
    ov_bitrateReturns the average bitrate of the current logical bitstream.
    ov_bitrate_instantReturns the exact bitrate since the last call of this function, or -1 if at the beginning of the bitream or no new information is available.
    ov_streamsGives the number of logical bitstreams within the current physical bitstream.
    ov_seekableIndicates whether the bitstream is seekable.
    ov_serialnumberReturns the unique serial number of the specified logical bitstream.
    ov_raw_totalReturns the total (compressed) bytes in a physical or logical seekable bitstream.
    ov_pcm_totalReturns the total number of samples in a physical or logical seekable bitstream.
    ov_time_totalReturns the total time length in seconds of a physical or logical seekable bitstream.
    ov_raw_tellReturns the byte location of the next sample to be read, giving the approximate location in the stream that the decoding engine has reached.
    ov_pcm_tellReturns the sample location of the next sample to be read, giving the approximate location in the stream that the decoding engine has reached.
    ov_time_tellReturns the time location of the next sample to be read, giving the approximate location in the stream that the decoding engine has reached.
    ov_infoReturns the vorbis_info struct for a specific bitstream section.
    ov_commentReturns attached comments for the current bitstream.
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/index.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/index.html deleted file mode 100644 index fc85866..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/index.html +++ /dev/null @@ -1,49 +0,0 @@ - - - -Vorbisfile - Documentation - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Vorbisfile Documentation

    - -

    - -The Vorbisfile library provides a convenient high-level API for -decoding and basic manipulation of all Vorbis I audio streams. -Libvorbisfile is implemented as a layer on top of Xiph.org's reference -libogg and libvorbis libraries.

    - -Vorbisfile can be used along with any ANSI compliant stdio implementation -for file/stream access, or use custom stream i/o routines provided by -the embedded environment. Both uses are described in detail in this -documentation. - -

    -API overview
    -API reference
    -Code Examples
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/initialization.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/initialization.html deleted file mode 100644 index c49b4e7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/initialization.html +++ /dev/null @@ -1,118 +0,0 @@ - - - -Vorbisfile - Setup/Teardown - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Setup/Teardown

    In order to decode audio using -libvorbisfile, a bitstream containing Vorbis audio must be properly -initialized before decoding and cleared when decoding is finished. -The simplest possible case is to use ov_fopen() to open the file for access, check -it for Vorbis content, and prepare it for playback. A successful return code from ov_fopen() indicates the file is ready for use. -Once the file is no longer needed, ov_clear() is used to close the file and -deallocate decoding resources.

    - -On systems other than Windows[a], an -application may also open a file itself using fopen(), then pass the -FILE * to libvorbisfile using ov_open(). Do not call -fclose() on a file handle successfully submitted to ov_open(); libvorbisfile does this in the ov_clear() call.

    - -An application that requires more setup flexibility may open a data -stream using ov_open_callbacks() -to change default libvorbis behavior or specify non-stdio data access -mechanisms.

    - -

    -All libvorbisfile initialization and deallocation routines are declared in "vorbis/vorbisfile.h". -

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    functionpurpose
    ov_fopenOpens a file and initializes the Ogg Vorbis bitstream with default values. This must be called before other functions in the library may be - used.
    ov_openInitializes the Ogg Vorbis bitstream with default values from a passed in file handle. This must be called before other functions in the library may be - used. Do not use this call under Windows [a]; Use ov_fopen() or ov_open_callbacks() instead.
    ov_open_callbacksInitializes the Ogg Vorbis bitstream from a file handle and custom file/bitstream manipulation routines. Used instead of ov_open() or ov_fopen() when altering or replacing libvorbis's default stdio I/O behavior, or when a bitstream must be initialized from a FILE * under Windows.
    ov_testPartially opens a file just far enough to determine if the file -is an Ogg Vorbis file or not. A successful return indicates that the -file appears to be an Ogg Vorbis file, but the OggVorbis_File struct is not yet fully -initialized for actual decoding. After a successful return, the file -may be closed using ov_clear() or fully -opened for decoding using ov_test_open().

    This call is intended to -be used as a less expensive file open test than a full ov_open().

    -Note that libvorbisfile owns the passed in file resource is it returns success; do not fclose() files owned by libvorbisfile.

    ov_test_callbacksAs above but allowing application-define I/O callbacks.

    -Note that libvorbisfile owns the passed in file resource is it returns success; do not fclose() files owned by libvorbisfile.

    ov_test_open -Finish opening a file after a successful call to ov_test() or ov_test_callbacks().
    ov_clear Closes the - bitstream and cleans up loose ends. Must be called when - finished with the bitstream. After return, the OggVorbis_File struct is - invalid and may not be used before being initialized again - before begin reinitialized. - -
    - -

    -

    - - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate.html deleted file mode 100644 index afd3945..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate.html +++ /dev/null @@ -1,72 +0,0 @@ - - - -Vorbisfile - function - ov_bitrate - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_bitrate

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    This function returns the average bitrate for the specified logical bitstream. This may be different from the ov_info->nominal_bitrate value, as it is based on the actual average for this bitstream if the file is seekable. -

    Nonseekable files will return the nominal bitrate setting or the average of the upper and lower bounds, if any of these values are set. -

    - -

    - - - - -
    -
    
-long ov_bitrate(OggVorbis_File *vf,int i);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. For nonseekable files, this argument is ignored. To retrieve the bitrate for the entire bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • OV_EINVAL indicates that an invalid argument value was submitted or that the stream represented by vf is not open.
    • -
  • OV_FALSE means the call returned a 'false' status, which in this case most likely indicates that the file is nonseekable and the upper, lower, and nominal bitrates were unset. -
  • n indicates the bitrate for the given logical bitstream or the entire - physical bitstream. If the file is open for random (seekable) access, it will - find the *actual* average bitrate. If the file is streaming (nonseekable), it - returns the nominal bitrate (if set) or else the average of the - upper/lower bounds (if set).
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate_instant.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate_instant.html deleted file mode 100644 index 137effb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_bitrate_instant.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -Vorbisfile - function - ov_bitrate - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_bitrate_instant

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Used to find the most recent bitrate played back within the file. Will return 0 if the bitrate has not changed or it is the beginning of the file. - -

    - - - - -
    -
    
-long ov_bitrate_instant(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. -
    - - -

    Return Values

    -
    -
  • 0 indicates the beginning of the file or unchanged bitrate info.
    • -
  • n indicates the actual bitrate since the last call.
    • -
  • OV_FALSE indicates that playback is not in progress, and thus there is no instantaneous bitrate information to report.
    • -
  • OV_EINVAL indicates that the stream represented by vf is not open.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_callbacks.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_callbacks.html deleted file mode 100644 index 603705e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_callbacks.html +++ /dev/null @@ -1,117 +0,0 @@ - - - -Vorbisfile - datatype - ov_callbacks - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_callbacks

    - -

    declared in "vorbis/codec.h"

    - -

    -The ov_callbacks structure contains file manipulation function prototypes necessary for opening, closing, seeking, and location. - -

    -The ov_callbacks structure does not need to be user-defined if you are -working with stdio-based file manipulation; the ov_fopen() and ov_open() calls internally provide default callbacks for -stdio. ov_callbacks are defined and passed to ov_open_callbacks() when -implementing non-stdio based stream manipulation (such as playback -from a memory buffer) or when ov_open()-style initialization from a FILE * is required under Windows [a]. -

    - - - - - -
    -
    typedef struct {
-  size_t (*read_func)  (void *ptr, size_t size, size_t nmemb, void *datasource);
-  int    (*seek_func)  (void *datasource, ogg_int64_t offset, int whence);
-  int    (*close_func) (void *datasource);
-  long   (*tell_func)  (void *datasource);
-} ov_callbacks;
    -
    - -

    Relevant Struct Members

    -
    -
    read_func
    -
    Pointer to custom data reading function.
    -
    seek_func
    -
    Pointer to custom data seeking function. If the data source is not seekable (or the application wants the data source to be treated as unseekable at all times), the provided seek callback should always return -1 (failure) or the seek_func and tell_func fields should be set to NULL.
    -
    close_func
    -
    Pointer to custom data source closure function. Set to NULL if libvorbisfile should not attempt to automatically close the file/data handle.
    -
    tell_func
    -
    Pointer to custom data location function. If the data source is not seekable (or the application wants the data source to be treated as unseekable at all times), the provided tell callback should always return -1 (failure) or the seek_func and tell_func fields should be set to NULL.
    -
    - -

    - -

    Predefined callbacks

    -The header vorbis/vorbisfile.h provides several predefined static ov_callbacks structures that may be passed to ov_open_callbacks(): -
    -
    OV_CALLBACKS_DEFAULT
    - -These callbacks provide the same behavior as used internally by ov_fopen() and ov_open(). - -
    OV_CALLBACKS_NOCLOSE
    - -The same as OV_CALLBACKS_DEFAULT, but with the -close_func field set to NULL. The most typical use would be -to use ov_open_callbacks() to -provide the same behavior as ov_open(), but -not close the file/data handle in ov_clear(). - -
    OV_CALLBACKS_STREAMONLY
    - -A set of callbacks that set seek_func and tell_func -to NULL, thus forcing strict streaming-only behavior regardless of -whether or not the input is actually seekable. - -
    OV_CALLBACKS_STREAMONLY_NOCLOSE
    - -The same as OV_CALLBACKS_STREAMONLY, but with -close_func also set to null, preventing libvorbisfile from -attempting to close the file/data handle in ov_clear(). - -
    -

    - -

    Examples and usage

    - -See the callbacks and non-stdio I/O document for more -detailed information on required behavior of the various callback -functions.

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_clear.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_clear.html deleted file mode 100644 index 62f353a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_clear.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -Vorbisfile - function - ov_clear - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_clear

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    After a bitstream has been opened using ov_fopen()/ov_open()/ov_open_callbacks() and decoding is complete, the application must call ov_clear() to clear -the decoder's buffers. ov_clear() will also close the file unless it was opened using ov_open_callbacks() with the close_func callback set to NULL.

    - -ov_clear() must also be called after a successful call to ov_test() or ov_test_callbacks().

    - -

    - - - - -
    -
    
-int ov_clear(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. After ov_clear has been called, the contents of this structure are deallocated, and it can no longer be used without being reinitialized by a call to ov_fopen(), ov_open() or ov_open_callbacks().
    -
    - - -

    Return Values

    -
    -
  • 0 for success
    • -
    - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_comment.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_comment.html deleted file mode 100644 index 740ecab..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_comment.html +++ /dev/null @@ -1,66 +0,0 @@ - - - -Vorbisfile - function - ov_bitrate - - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_comment

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns a pointer to the vorbis_comment struct for the specified bitstream. For nonseekable streams, returns the struct for the current bitstream. -

    - -

    - - - - -
    -
    
-vorbis_comment *ov_comment(OggVorbis_File *vf,int link);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. For nonseekable files, this argument is ignored. To retrieve the vorbis_comment struct for the current bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • Returns the vorbis_comment struct for the specified bitstream.
    • -
  • NULL if the specified bitstream does not exist or the file has been initialized improperly.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_crosslap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_crosslap.html deleted file mode 100644 index b13ebbd..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_crosslap.html +++ /dev/null @@ -1,100 +0,0 @@ - - - -Vorbisfile - function - ov_crosslap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_crosslap()

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    ov_crosslap overlaps and blends the boundary at a transition -between two separate streams represented by separate OggVorbis_File structures. For lapping -transitions due to seeking within a single stream represented by a -single OggVorbis_File structure, -consider using the lapping versions of the vorbisfile seeking functions instead. - -

    ov_crosslap is used between the last (usually ov_read) call on -the old stream and the first ov_read from the new stream. Any -desired positioning of the new stream must occur before the call to -ov_crosslap() as a seek dumps all prior lapping information from a -stream's decode state. Crosslapping does not introduce or remove any -extraneous samples; positioning works exactly as if ov_crosslap was not -called. - -

    ov_crosslap will lap between streams of differing numbers of -channels. Any extra channels from the old stream are ignored; playback -of these channels simply ends. Extra channels in the new stream are -lapped from silence. ov_crosslap will also lap between streams links -of differing sample rates. In this case, the sample rates are ignored -(no implicit resampling is done to match playback). It is up to the -application developer to decide if this behavior makes any sense in a -given context; in practical use, these default behaviors perform -sensibly. - -

    - - - - -
    -
    
-long ov_crosslap(OggVorbis_File *old, OggVorbis_File *new);
-
-
    -
    - -

    Parameters

    -
    -
    old
    -
    A pointer to the OggVorbis_File structure representing the origin stream from which to transition playback.
    - -
    new
    -
    A pointer to the OggVorbis_File structure representing the stream with which playback continues.
    -
    - - -

    Return Values

    -
    -
    -
    OV_EINVAL
    -
    crosslap called with an OggVorbis_File structure that isn't open.
    -
    OV_EFAULT
    -
    internal error; implies a library bug or external heap corruption.
    -
    OV_EREAD
    -
    A read from media returned an error.
    -
    OV_EOF
    -
    indicates stream vf2 is at end of file, or that vf1 is at end of file immediately after a seek (making crosslap impossible as there's no preceding decode state to crosslap).
    -
    0
    -
    success.
    -
    -
    - - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_fopen.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_fopen.html deleted file mode 100644 index 256f581..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_fopen.html +++ /dev/null @@ -1,124 +0,0 @@ - - - -Vorbisfile - function - ov_fopen - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_fopen

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    This is the simplest function used to open and initialize an OggVorbis_File -structure. It sets up all the related decoding structure. -

    The first argument is a file path suitable -for passing to fopen(). vf should be a pointer to an empty -OggVorbis_File structure -- this is used for ALL the externally visible -libvorbisfile functions. Once this has been called, the same OggVorbis_File struct should be passed -to all the libvorbisfile functions. -

    The vf structure initialized using ov_fopen() must -eventually be cleaned using ov_clear(). - -

    -It is often useful to call ov_fopen() simply to determine -whether a given file is a Vorbis bitstream. If the ov_fopen() -call fails, then the file is either inaccessable (errno is set) or not -recognizable as Vorbis (errno unchanged). If the call succeeds but -the initialized vf structure will not be used, the -application is responsible for calling ov_clear() to clear the decoder's buffers and -close the file.

    - -

    - - - - -
    -
    
-int ov_fopen(char *path,OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    path
    -
    Null terminated string containing a file path suitable for passing to fopen(). -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    - - -

    Return Values

    -
    -
  • 0 indicates success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream does not contain any Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - -

    Notes

    -
    - -
    [a] Threaded decode

    -

    If your decoder is threaded, it is recommended that you NOT call -ov_open_callbacks() -in the main control thread--instead, call ov_open_callbacks() in your decode/playback -thread. This is important because ov_open_callbacks() may be a fairly time-consuming -call, given that the full structure of the file is determined at this point, -which may require reading large parts of the file under certain circumstances -(determining all the logical bitstreams in one physical bitstream, for -example). See Thread Safety for other information on using libvorbisfile with threads. -

    - -

    [b] Mixed media streams

    -

    -As of Vorbisfile release 1.2.0, Vorbisfile is able to access the -Vorbis content in mixed-media Ogg streams, not just Vorbis-only -streams. For example, Vorbisfile may be used to open and access the -audio from an Ogg stream consisting of Theora video and Vorbis audio. -Vorbisfile 1.2.0 decodes the first logical audio stream of each -physical stream section.

    - -

    [c] Faster testing for Vorbis files

    -

    ov_test() and ov_test_callbacks() provide less -computationally expensive ways to test a file for Vorbisness, but -require more setup code.

    - -

    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_info.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_info.html deleted file mode 100644 index c9cc062..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_info.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -Vorbisfile - function - ov_info - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_info

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the vorbis_info struct for the specified bitstream. For nonseekable files, always returns the current vorbis_info struct. - -

    - - - - -
    -
    
-vorbis_info *ov_info(OggVorbis_File *vf,int link);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. For nonseekable files, this argument is ignored. To retrieve the vorbis_info struct for the current bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • Returns the vorbis_info struct for the specified bitstream. Returns vorbis_info for current bitstream if the file is nonseekable or i=-1.
    • -
  • NULL if the specified bitstream does not exist or the file has been initialized improperly.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open.html deleted file mode 100644 index 9b6f9e0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open.html +++ /dev/null @@ -1,183 +0,0 @@ - - - -Vorbisfile - function - ov_open - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_open

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    ov_open is one of three initialization functions used to initialize -an OggVorbis_File structure and prepare a bitstream for playback. - -

    WARNING for Windows developers: Do not use ov_open() in -Windows applications; Windows linking places restrictions on -passing FILE * handles successfully, and ov_open() runs -afoul of these restrictions [a]. See the ov_open_callbacks() page for -details on using ov_open_callbacks() instead. - -

    The first argument must be a file pointer to an already opened file -or pipe (it need not be seekable--though this obviously restricts what -can be done with the bitstream). vf should be a pointer to the -OggVorbis_File structure -- this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.

    - -The vf structure initialized using ov_fopen() must eventually -be cleaned using ov_clear(). Once a -FILE * handle is passed to ov_open() successfully, the -application MUST NOT fclose() or in any other way manipulate -that file handle. Vorbisfile will close the file in ov_clear(). If the application must be able -to close the FILE * handle itself, see ov_open_callbacks() with the use of -OV_CALLBACKS_NOCLOSE. - -

    It is often useful to call ov_open() simply to determine -whether a given file is a Vorbis bitstream. If the ov_open() -call fails, then the file is not recognizable as Vorbis. If the call -succeeds but the initialized vf structure will not be used, -the application is responsible for calling ov_clear() to clear the decoder's buffers and -close the file.

    - -If [and only if] an ov_open() call fails, the application -must explicitly fclose() the FILE * pointer itself. - - -

    - - - - -
    -
    
-int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
-
    -
    - -

    Parameters

    -
    -
    f
    -
    File pointer to an already opened file -or pipe (it need not be seekable--though this obviously restricts what -can be done with the bitstream).
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    initial
    -
    Typically set to NULL. This parameter is useful if some data has already been -read from the file and the stream is not seekable. It is used in conjunction with ibytes. In this case, initial -should be a pointer to a buffer containing the data read.
    -
    ibytes
    -
    Typically set to 0. This parameter is useful if some data has already been -read from the file and the stream is not seekable. In this case, ibytes -should contain the length (in bytes) of the buffer. Used together with initial
    -
    - - -

    Return Values

    -
    -
  • 0 indicates success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream is not Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - - -

    Notes

    -
    - - -
    [a] Windows and ov_open()

    - -

    Under Windows, stdio file access is implemented in each of many -variants of crt.o, several of which are typically installed on any one -Windows machine. If libvorbisfile and the application using -libvorbisfile are not linked against the exact same -version/variant/build of crt.o (and they usually won't be, especially -using a prebuilt libvorbis DLL), FILE * handles cannot be -opened in the application and then passed to vorbisfile to be used -by stdio calls from vorbisfile's different version of CRT. For this -reason, using ov_open() under Windows -without careful, expert linking will typically cause a protection -fault. Windows programmers should use ov_fopen() (which will only use libvorbis's -crt.o) or ov_open_callbacks() -(which will only use the application's crt.o) instead.

    - -This warning only applies to Windows and only applies to ov_open(). It is perfectly safe to use ov_open() on all other platforms.

    - -For more information, see the following microsoft pages on C -runtime library linking and a specific description of restrictions -on passing CRT objects across DLL boundaries. - -

    - -

    [b] Threaded decode

    -

    If your decoder is threaded, it is recommended that you NOT call -ov_open() -in the main control thread--instead, call ov_open() in your decode/playback -thread. This is important because ov_open() may be a fairly time-consuming -call, given that the full structure of the file is determined at this point, -which may require reading large parts of the file under certain circumstances -(determining all the logical bitstreams in one physical bitstream, for -example). See Thread Safety for other information on using libvorbisfile with threads. -

    - -

    [c] Mixed media streams

    -

    -As of Vorbisfile release 1.2.0, Vorbisfile is able to access the -Vorbis content in mixed-media Ogg streams, not just Vorbis-only -streams. For example, Vorbisfile may be used to open and access the -audio from an Ogg stream consisting of Theora video and Vorbis audio. -Vorbisfile 1.2.0 decodes the first logical audio stream of each -physical stream section.

    - -

    [d] Faster testing for Vorbis files

    -

    ov_test() and ov_test_callbacks() provide less -computationally expensive ways to test a file for Vorbisness, but -require more setup code.

    - -

    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open_callbacks.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open_callbacks.html deleted file mode 100644 index 6718f12..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_open_callbacks.html +++ /dev/null @@ -1,147 +0,0 @@ - - - -Vorbisfile - function - ov_open_callbacks - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_open_callbacks

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    This is an alternative function used to open and initialize an -OggVorbis_File structure when using a data source other than a file, -when its necessary to modify default file access behavior, or to -initialize a Vorbis decode from a FILE * pointer under -Windows where ov_open() cannot be used. It -allows the application to specify custom file manipulation routines -and sets up all the related decoding structures. - -

    Once ov_open_callbacks() has been called, the same -OggVorbis_File struct should be passed to all the -libvorbisfile functions. Unlike ov_fopen() and ov_open(), ov_open_callbacks() may be used to -instruct vorbisfile to either automatically close or not to close the -file/data access handle in ov_clear(). -Automatic closure is disabled by passing NULL as the close callback, -or using one of the predefined callback sets that specify a NULL close -callback. The application is responsible for closing a file when a -call to ov_open_callbacks() is unsuccessful.

    - -See also Callbacks and Non-stdio I/O for -information on designing and specifying custom callback functions.

    - -

    - - - - -
    -
    
-int ov_open_callbacks(void *datasource, OggVorbis_File *vf, char *initial, long ibytes, ov_callbacks callbacks);
-
    -
    - -

    Parameters

    -
    -
    datasource
    -
    Pointer to a data structure allocated by the calling application, containing any state needed by the callbacks provided.
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    initial
    -
    Typically set to NULL. This parameter is useful if some data has already been -read from the stream and the stream is not seekable. It is used in conjunction with ibytes. In this case, initial -should be a pointer to a buffer containing the data read.
    -
    ibytes
    -
    Typically set to 0. This parameter is useful if some data has already been -read from the stream and the stream is not seekable. In this case, ibytes -should contain the length (in bytes) of the buffer. Used together with initial.
    -
    callbacks
    -
    A completed ov_callbacks struct which indicates desired custom file manipulation routines. vorbisfile.h defines several preprovided callback sets; see ov_callbacks for details.
    -
    - - -

    Return Values

    -
    -
  • 0 for success
    • -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream does not contain any Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - -

    Notes

    -
    - -
    [a] Windows and use as an ov_open() substitute

    Windows -applications should not use ov_open() due -to the likelihood of CRT linking -mismatches and runtime protection faults -[ov_open:a]. ov_open_callbacks() is a safe substitute; specifically: - -

    ov_open_callbacks(f, vf, initial, ibytes, OV_CALLBACKS_DEFAULT);
-
    - -... provides exactly the same functionality as ov_open() but will always work correctly under -Windows, regardless of linking setup details.

    - -

    [b] Threaded decode

    -

    If your decoder is threaded, it is recommended that you NOT call -ov_open_callbacks() -in the main control thread--instead, call ov_open_callbacks() in your decode/playback -thread. This is important because ov_open_callbacks() may be a fairly time-consuming -call, given that the full structure of the file is determined at this point, -which may require reading large parts of the file under certain circumstances -(determining all the logical bitstreams in one physical bitstream, for -example). See Thread Safety for other information on using libvorbisfile with threads. -

    - -

    [c] Mixed media streams

    -

    -As of Vorbisfile release 1.2.0, Vorbisfile is able to access the -Vorbis content in mixed-media Ogg streams, not just Vorbis-only -streams. For example, Vorbisfile may be used to open and access the -audio from an Ogg stream consisting of Theora video and Vorbis audio. -Vorbisfile 1.2.0 decodes the first logical audio stream of each -physical stream section.

    - -

    [d] Faster testing for Vorbis files

    -

    ov_test() and ov_test_callbacks() provide less -computationally expensive ways to test a file for Vorbisness, but -require more setup code.

    - -

    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek.html deleted file mode 100644 index 73e2f66..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek.html +++ /dev/null @@ -1,83 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_seek - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_seek

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the offset specified (in pcm samples) within the physical bitstream. This function only works for seekable streams. -

    This also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from -the newly seeked to position. -

    - -

    - - - - -
    -
    
-int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in pcm samples to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_lap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_lap.html deleted file mode 100644 index 4a30a92..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_lap.html +++ /dev/null @@ -1,103 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_seek_lap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_seek_lap

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the offset specified (in pcm samples) within the physical bitstream. This variant of ov_pcm_seek also automatically -crosslaps the transition from the previous playback position into the -new playback position in order to eliminate clicking and boundary -discontinuities. Otherwise, usage and behavior is identical to ov_pcm_seek. - -

    ov_pcm_seek_lap also updates everything needed within the decoder, -so you can immediately call ov_read() and -get data from the newly seeked to position. - -

    ov_pcm_seek_lap will lap between logical stream links of differing -numbers of channels. Any extra channels from the origin of the seek -are ignored; playback of these channels simply ends. Extra channels at -the destination are lapped from silence. ov_pcm_seek_lap will also -lap between logical stream links of differing sample rates. In this -case, the sample rates are ignored (no implicit resampling is done to -match playback). It is up to the application developer to decide if -this behavior makes any sense in a given context; in practical use, -these default behaviors perform sensibly. - -

    This function only works for seekable streams. - -

    - - - - -
    -
    
-int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in pcm samples to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EOF - Indicates stream is at end of file immediately after a seek - (making crosslap impossible as there's no preceeding decode state to crosslap). -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page.html deleted file mode 100644 index 796609e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page.html +++ /dev/null @@ -1,84 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_seek_page - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_seek_page

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the closest page preceding the specified location (in pcm samples) within the physical bitstream. This function only works for seekable streams. -

    This function is faster than ov_pcm_seek because the function can begin decoding at a page boundary rather than seeking through any remaining samples before the specified location. However, it is less accurate. -

    This also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from -the newly seeked to position. -

    - -

    - - - - -
    -
    
-int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in pcm samples to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page_lap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page_lap.html deleted file mode 100644 index 558f6ab..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_seek_page_lap.html +++ /dev/null @@ -1,112 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_seek_page_lap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_seek_page_lap

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the closest page preceding the specified location (in pcm -samples) within the physical bitstream. This variant of ov_pcm_seek_page also automatically -crosslaps the transition from the previous playback position into the -new playback position in order to eliminate clicking and boundary -discontinuities. Otherwise, usage and behavior is identical to ov_pcm_seek_page. - -

    This function is faster than ov_pcm_seek_lap because the function -can begin decoding at a page boundary rather than seeking through any -remaining samples before the specified location. However, it is less -accurate. - -

    ov_pcm_seek_page_lap also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from the newly seeked -to position. - -

    ov_pcm_seek_page_lap will lap between logical stream links of -differing numbers of channels. Any extra channels from the origin of -the seek are ignored; playback of these channels simply ends. Extra -channels at the destination are lapped from silence. -ov_pcm_seek_page_lap will also lap between logical stream links of -differing sample rates. In this case, the sample rates are ignored -(no implicit resampling is done to match playback). It is up to the -application developer to decide if this behavior makes any sense in a -given context; in practical use, these default behaviors perform -sensibly. - -

    This function only works for seekable streams. - -

    - - - - -
    -
    
-int ov_pcm_seek_page_lap(OggVorbis_File *vf,ogg_int64_t pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in pcm samples to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EOF - Indicates stream is at end of file immediately after a seek - (making crosslap impossible as there's no preceeding decode state to crosslap). -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_tell.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_tell.html deleted file mode 100644 index 09a9cd4..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_tell.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_tell - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_tell

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the current offset in samples. - -

    - - - - -
    -
    
-ogg_int64_t ov_pcm_tell(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    - - -

    Return Values

    -
    -
  • n indicates the current offset in samples.
    • -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_total.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_total.html deleted file mode 100644 index fb44bcc..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_pcm_total.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -Vorbisfile - function - ov_pcm_total - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_pcm_total

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the total pcm samples of the physical bitstream or a specified logical bitstream. - -

    - - - - -
    -
    
-ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. To retrieve the total pcm samples for the entire physical bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist or the bitstream is unseekable.
    • -
  • -total length in pcm samples of content if i=-1.
    • -
  • length in pcm samples of logical bitstream if i=0 to n.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek.html deleted file mode 100644 index 285afdb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek.html +++ /dev/null @@ -1,83 +0,0 @@ - - - -Vorbisfile - function - ov_raw_seek - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_raw_seek

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the offset specified (in compressed raw bytes) within the physical bitstream. This function only works for seekable streams. -

    This also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from -the newly seeked to position. -

    When seek speed is a priority, this is the best seek funtion to use. -

    - - - - -
    -
    
-int ov_raw_seek(OggVorbis_File *vf,long pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in compressed bytes to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek_lap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek_lap.html deleted file mode 100644 index 2a55a62..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_seek_lap.html +++ /dev/null @@ -1,110 +0,0 @@ - - - -Vorbisfile - function - ov_raw_seek_lap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_raw_seek_lap

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Seeks to the offset specified (in compressed raw bytes) within the -physical bitstream. This variant of ov_raw_seek also automatically crosslaps -the transition from the previous playback position into the new -playback position in order to eliminate clicking and boundary -discontinuities. Otherwise, usage and behavior is identical to ov_raw_seek. - -

    When seek speed is a priority, but crosslapping is still desired, -this is the best seek funtion to use. - -

    ov_raw_seek_lap also updates everything needed within the decoder, -so you can immediately call ov_read() and -get data from the newly seeked to position. - -

    ov_raw_seek_lap will lap between logical stream links of differing -numbers of channels. Any extra channels from the origin of the seek -are ignored; playback of these channels simply ends. Extra channels at -the destination are lapped from silence. ov_raw_seek_lap will also -lap between logical stream links of differing sample rates. In this -case, the sample rates are ignored (no implicit resampling is done to -match playback). It is up to the application developer to decide if -this behavior makes any sense in a given context; in practical use, -these default behaviors perform sensibly. - -

    This function only works for seekable streams. - - -

    - - - - -
    -
    
-int ov_raw_seek_lap(OggVorbis_File *vf,long pos);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    pos
    -
    Position in compressed bytes to seek to in the bitstream.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EOF - Indicates stream is at end of file immediately after a seek - (making crosslap impossible as there's no preceeding decode state to crosslap). -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_tell.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_tell.html deleted file mode 100644 index 525ce88..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_tell.html +++ /dev/null @@ -1,65 +0,0 @@ - - - -Vorbisfile - function - ov_raw_tell - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_raw_tell

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the current offset in raw compressed bytes.

    - -

    Note that if you later use ov_raw_seek() to return to this point, you won't generally get back to exactly the same place, due to internal buffering. Also note that a read operation may not cause a change to the current raw offset - only a read that requires reading more data from the underlying data source will do that.

    - -

    - - - - -
    -
    
-ogg_int64_t ov_raw_tell(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    - - -

    Return Values

    -
    -
  • n indicates the current offset in bytes.
    • -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_total.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_total.html deleted file mode 100644 index 7b89f0e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_raw_total.html +++ /dev/null @@ -1,68 +0,0 @@ - - - -Vorbisfile - function - ov_raw_total - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_raw_total

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the total (compressed) bytes of the physical bitstream or a specified logical bitstream. - -

    - - - - -
    -
    
-ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. To retrieve the total bytes for the entire physical bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist or the bitstream is nonseekable
    • -
  • n -total length in compressed bytes of content if i=-1.
    • -
  • n length in compressed bytes of logical bitstream if i=0 to n.
    • -
    -

    - - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read.html deleted file mode 100644 index 8144af4..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read.html +++ /dev/null @@ -1,148 +0,0 @@ - - - -Vorbisfile - function - ov_read - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_read()

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    - This is the main function used to decode a Vorbis file within a - loop. It returns up to the specified number of bytes of decoded PCM audio - in the requested endianness, signedness, and word size. If the audio is - multichannel, the channels are interleaved in the output buffer. - If the passed in buffer is large, ov_read() will not fill - it; the passed in buffer size is treated as a limit and - not a request. - -

    The output channels are in stream order and not remapped. Vorbis I -defines channel order as follows: - -

      -
    • one channel - the stream is monophonic -
    • two channels - the stream is stereo. channel order: left, right -
    • three channels - the stream is a 1d-surround encoding. channel order: left, -center, right -
    • four channels - the stream is quadraphonic surround. channel order: front left, -front right, rear left, rear right -
    • five channels - the stream is five-channel surround. channel order: front left, -center, front right, rear left, rear right -
    • six channels - the stream is 5.1 surround. channel order: front left, center, -front right, rear left, rear right, LFE -
    • seven channels - the stream is 6.1 surround. channel order: front left, center, -front right, side left, side right, rear center, LFE -
    • eight channels - the stream is 7.1 surround. channel order: front left, center, -front right, side left, side right, rear left, rear right, -LFE -
    • greater than eight channels - channel use and order is undefined -
    - -

    Note that up to this point, the Vorbisfile API could more or less hide the - multiple logical bitstream nature of chaining from the toplevel - application if the toplevel application didn't particularly care. - However, when reading audio back, the application must be aware - that multiple bitstream sections do not necessarily use the same - number of channels or sampling rate.

    ov_read() passes - back the index of the sequential logical bitstream currently being - decoded (in *bitstream) along with the PCM data in order - that the toplevel application can handle channel and/or sample - rate changes. This number will be incremented at chaining - boundaries even for non-seekable streams. For seekable streams, it - represents the actual chaining index within the physical bitstream. -

    - -

    - - - - -
    -
    
-long ov_read(OggVorbis_File *vf, char *buffer, int length, int bigendianp, int word, int sgned, int *bitstream);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    buffer
    -
    A pointer to an output buffer. The decoded output is inserted into this buffer.
    -
    length
    -
    Number of bytes to be read into the buffer. Should be the same size as the buffer. A typical value is 4096.
    -
    bigendianp
    -
    Specifies big or little endian byte packing. 0 for little endian, 1 for b -ig endian. Typical value is 0.
    -
    word
    -
    Specifies word size. Possible arguments are 1 for 8-bit samples, or 2 or -16-bit samples. Typical value is 2.
    -
    sgned
    -
    Signed or unsigned data. 0 for unsigned, 1 for signed. Typically 1.
    -
    bitstream
    -
    A pointer to the number of the current logical bitstream.
    -
    - - -

    Return Values

    -
    -
    -
    OV_HOLE
    -
    indicates there was an interruption in the data. -
    (one of: garbage between pages, loss of sync followed by - recapture, or a corrupt page)
    -
    OV_EBADLINK
    -
    indicates that an invalid stream section was supplied to - libvorbisfile, or the requested link is corrupt.
    -
    OV_EINVAL
    -
    indicates the initial file headers couldn't be read or - are corrupt, or that the initial open call for vf - failed.
    -
    0
    -
    indicates EOF
    -
    n
    -
    indicates actual number of bytes read. ov_read() will - decode at most one vorbis packet per invocation, so the value - returned will generally be less than length. -
    -
    - -

    Notes

    -

    Typical usage: -

    -bytes_read = ov_read(&vf, -buffer, 4096,0,2,1,&current_section) -
    - -This reads up to 4096 bytes into a buffer, with signed 16-bit -little-endian samples. -

    - - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read_float.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read_float.html deleted file mode 100644 index 4138ebf..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_read_float.html +++ /dev/null @@ -1,105 +0,0 @@ - - - -Vorbisfile - function - ov_read_float - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_read_float()

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    - This is the function used to decode a Vorbis file within a loop, but - returns samples in native float format instead of in integer formats. -

    - For information on channel ordering and how ov_read_float() deals with the complex issues - of chaining, etc, refer to the documentation for ov_read(). -

    - -

    - - - - -
    -
    
-long ov_read_float(OggVorbis_File *vf, float ***pcm_channels, int samples, int *bitstream);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible vorbisfile -functions.
    -
    pcm_channels
    -
    A pointer to an output buffer. The pointer will be set to the decoded output buffer.
    -
    samples
    -
    Maximum number of decoded samples to produce.
    -
    bitstream
    -
    A pointer to the number of the current logical bitstream.
    -
    - - -

    Return Values

    -
    -
    -
    OV_HOLE
    -
    indicates there was an interruption in the data. -
    (one of: garbage between pages, loss of sync followed by - recapture, or a corrupt page)
    -
    OV_EBADLINK
    -
    indicates that an invalid stream section was supplied to - libvorbisfile, or the requested link is corrupt.
    -
    OV_EINVAL
    -
    indicates the initial file headers couldn't be read or - are corrupt, or that the initial open call for vf - failed.
    -
    0
    -
    indicates EOF
    -
    n
    -
    indicates actual number of samples read. ov_read_float() will - decode at most one vorbis packet per invocation, so the value - returned will generally be less than length. -
    -
    - -

    Notes

    -

    Typical usage: -

    -float **pcm; -samples_read = ov_read_float(&vf,pcm, 1024, &current_section) -
    - -This decodes up to 1024 float samples. -

    - -
    -

    -
    - - - - - - - - -

    copyright © 2002 vorbis team

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_seekable.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_seekable.html deleted file mode 100644 index fee1d88..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_seekable.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -Vorbisfile - function - ov_seekable - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_seekable

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    This indicates whether or not the bitstream is seekable. - - -

    - - - - -
    -
    
-long ov_seekable(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    - - -

    Return Values

    -
    -
  • 0 indicates that the file is not seekable.
    • -
  • nonzero indicates that the file is seekable.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_serialnumber.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_serialnumber.html deleted file mode 100644 index abd01c7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_serialnumber.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -Vorbisfile - function - ov_serialnumber - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_serialnumber

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the serialnumber of the specified logical bitstream link number within the overall physical bitstream. - -

    - - - - -
    -
    
-long ov_serialnumber(OggVorbis_File *vf,int i);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. For nonseekable files, this argument is ignored. To retrieve the serial number of the current bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • --1 if the specified logical bitstream i does not exist.
    • - -
  • Returns the serial number of the logical bitstream i or the serial number of the current bitstream if the file is nonseekable.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_streams.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_streams.html deleted file mode 100644 index a8f2a62..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_streams.html +++ /dev/null @@ -1,64 +0,0 @@ - - - -Vorbisfile - function - ov_streams - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_streams

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the number of logical bitstreams within our physical bitstream. - -

    - - - - -
    -
    
-long ov_streams(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    - - -

    Return Values

    -
    -
  • -1 indicates a single logical bitstream or an unseekable file.
    • -
  • n indicates the number of logical bitstreams.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test.html deleted file mode 100644 index 0975972..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test.html +++ /dev/null @@ -1,101 +0,0 @@ - - - -Vorbisfile - function - ov_test - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_test

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    -This partially opens a vorbis file to test for Vorbis-ness. It loads -the headers for the first chain and tests for seekability (but does not seek). -Use ov_test_open() to finish opening the file -or ov_clear to close/free it. -

    - -

    WARNING for Windows developers: Do not use ov_test() -in Windows applications; Windows linking places restrictions on -passing FILE * handles successfully, and ov_test() runs afoul -of these restrictions [a] in exactly the same -way as ov_open(). See the ov_test_callbacks() page for -details on using ov_test_callbacks() instead. -

    - - - - - -
    -
    
-int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes);
-
    -
    - -

    Parameters

    -
    -
    f
    -
    File pointer to an already opened file -or pipe (it need not be seekable--though this obviously restricts what -can be done with the bitstream).
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    initial
    -
    Typically set to NULL. This parameter is useful if some data has already been -read from the file and the stream is not seekable. It is used in conjunction with ibytes. In this case, initial -should be a pointer to a buffer containing the data read.
    -
    ibytes
    -
    Typically set to 0. This parameter is useful if some data has already been -read from the file and the stream is not seekable. In this case, ibytes -should contain the length (in bytes) of the buffer. Used together with initial
    -
    - - -

    Return Values

    -
    -
  • 0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream contains no Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - -

    Notes

    - -All the notes from ov_open() apply to ov_test(). - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_callbacks.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_callbacks.html deleted file mode 100644 index 5d659cd..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_callbacks.html +++ /dev/null @@ -1,111 +0,0 @@ - - - -Vorbisfile - function - ov_test_callbacks - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_test_callbacks

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    This is an alternative function used to open and test an OggVorbis_File -structure when using a data source other than a file, -when its necessary to modify default file access behavior, or to -test for Vorbis content from a FILE * pointer under -Windows where ov_test() cannot be used. It -allows the application to specify custom file manipulation routines -and sets up all the related decoding structures. - -

    Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions. -

    -

    - - - - -
    -
    
-int ov_test_callbacks(void *datasource, OggVorbis_File *vf, char *initial, long ibytes, ov_callbacks callbacks);
-
    -
    - -

    Parameters

    -
    -
    f
    -
    File pointer to an already opened file -or pipe (it need not be seekable--though this obviously restricts what -can be done with the bitstream).
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    initial
    -
    Typically set to NULL. This parameter is useful if some data has already been -read from the file and the stream is not seekable. It is used in conjunction with ibytes. In this case, initial -should be a pointer to a buffer containing the data read.
    -
    ibytes
    -
    Typically set to 0. This parameter is useful if some data has already been -read from the file and the stream is not seekable. In this case, ibytes -should contain the length (in bytes) of the buffer. Used together with initial.
    -
    callbacks
    -
    A completed ov_callbacks struct which indicates desired custom file manipulation routines. vorbisfile.h defines several preprovided callback sets; see ov_callbacks for details.
    -
    - - -

    Return Values

    -
    -
  • 0 for success
    • -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream contains no Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - -

    Notes

    -
    - -
    [a] Windows and use as an ov_test() substitute

    Windows -applications should not use ov_test() due -to the likelihood of CRT linking -mismatches and runtime protection faults -[ov_open:a]. ov_test_callbacks() is a safe substitute; specifically: - -

    ov_test_callbacks(f, vf, initial, ibytes, OV_CALLBACKS_DEFAULT);
-
    - -... provides exactly the same functionality as ov_test() but will always work correctly under -Windows, regardless of linking setup details.

    - -

    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_open.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_open.html deleted file mode 100644 index d379311..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_test_open.html +++ /dev/null @@ -1,82 +0,0 @@ - - - -Vorbisfile - function - ov_test_open - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_test_open

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    -Finish opening a file partially opened with ov_test() -or ov_test_callbacks(). -

    - - - - - -
    -
    
-int ov_test_open(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions. Once this has been called, the same OggVorbis_File -struct should be passed to all the libvorbisfile functions.
    -
    - - -

    Return Values

    -
    -
  • -0 for success
    • - -
  • less than zero for failure:
    • -
      -
    • OV_EREAD - A read from media returned an error.
      • -
    • OV_ENOTVORBIS - Bitstream is not Vorbis data.
      • -
    • OV_EVERSION - Vorbis version mismatch.
      • -
    • OV_EBADHEADER - Invalid Vorbis bitstream header.
      • -
    • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.
      • -
    -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek.html deleted file mode 100644 index 28376b1..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek.html +++ /dev/null @@ -1,82 +0,0 @@ - - - -Vorbisfile - function - ov_time_seek - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_seek

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    For seekable -streams, this seeks to the given time. For implementing seeking in a player, -this is the only function generally needed. This also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from -the newly seeked to position. This function does not work for unseekable streams. - -

    - - - - -
    -
    
-int ov_time_seek(OggVorbis_File *vf, double s);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    Pointer to our already opened and initialized OggVorbis_File structure.
    -
    ms
    -
    Location to seek to within the file, specified in seconds.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_lap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_lap.html deleted file mode 100644 index b609818..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_lap.html +++ /dev/null @@ -1,105 +0,0 @@ - - - -Vorbisfile - function - ov_time_seek_lap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_seek_lap

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    For seekable -streams, ov_time_seek_lap seeks to the given time. This variant of ov_time_seek also automatically -crosslaps the transition from the previous playback position into the -new playback position in order to eliminate clicking and boundary -discontinuities. Otherwise, usage and behavior is identical to ov_time_seek. - -

    ov_time_seek_lap also updates everything needed within the decoder, -so you can immediately call ov_read() and -get data from the newly seeked to position. - -

    ov_time_seek_lap will lap between logical stream links of differing -numbers of channels. Any extra channels from the origin of the seek -are ignored; playback of these channels simply ends. Extra channels at -the destination are lapped from silence. ov_time_seek_lap will also -lap between logical stream links of differing sample rates. In this -case, the sample rates are ignored (no implicit resampling is done to -match playback). It is up to the application developer to decide if -this behavior makes any sense in a given context; in practical use, -these default behaviors perform sensibly. - -

    This function does not work for unseekable streams. - - -

    - - - - -
    -
    
-int ov_time_seek_lap(OggVorbis_File *vf, double s);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    Pointer to our already opened and initialized OggVorbis_File structure.
    -
    ms
    -
    Location to seek to within the file, specified in seconds.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EOF - Indicates stream is at end of file immediately after a seek - (making crosslap impossible as there's no preceeding decode state to crosslap). -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page.html deleted file mode 100644 index 40e410a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page.html +++ /dev/null @@ -1,83 +0,0 @@ - - - -Vorbisfile - function - ov_time_seek_page - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_seek_page

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    For seekable -streams, this seeks to closest full page preceding the given time. This function is faster than ov_time_seek because it doesn't seek through the last few samples to reach an exact time, but it is also less accurate. This should be used when speed is important. -

    This function also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from -the newly seeked to position. -

    This function does not work for unseekable streams. - -

    - - - - -
    -
    
-int ov_time_seek_page(OggVorbis_File *vf, double s);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    Pointer to our already opened and initialized OggVorbis_File structure.
    -
    ms
    -
    Location to seek to within the file, specified in seconds.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page_lap.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page_lap.html deleted file mode 100644 index 75b02d3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_seek_page_lap.html +++ /dev/null @@ -1,112 +0,0 @@ - - - -Vorbisfile - function - ov_time_seek_page_lap - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_seek_page_lap

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    For seekable streams, ov_time_seek_page_lap seeks to the closest -full page preceeding the given time. This variant of ov_time_seek_page also automatically -crosslaps the transition from the previous playback position into the -new playback position in order to eliminate clicking and boundary -discontinuities. Otherwise, usage and behavior is identical to ov_time_seek_page. - -

    ov_time_seek_page_lap is faster than ov_time_seek_lap because it doesn't -seek through the last few samples to reach an exact time, but it is -also less accurate. This should be used when speed is important, but -crosslapping is still desired. - -

    ov_time_seek_page_lap also updates everything needed within the -decoder, so you can immediately call ov_read() and get data from the newly seeked -to position. - -

    ov_time_seek_page_lap will lap between logical stream links of -differing numbers of channels. Any extra channels from the origin of -the seek are ignored; playback of these channels simply ends. Extra -channels at the destination are lapped from silence. -ov_time_seek_page_lap will also lap between logical stream links of -differing sample rates. In this case, the sample rates are ignored -(no implicit resampling is done to match playback). It is up to the -application developer to decide if this behavior makes any sense in a -given context; in practical use, these default behaviors perform -sensibly. - -

    This function does not work for unseekable streams. - -

    - - - - -
    -
    
-int ov_time_seek_page_lap(OggVorbis_File *vf, double s);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    Pointer to our already opened and initialized OggVorbis_File structure.
    -
    ms
    -
    Location to seek to within the file, specified in seconds.
    -
    - - -

    Return Values

    -
    -
      -
    • 0 for success
      • - -
    • -nonzero indicates failure, described by several error codes: -
        -
      • OV_ENOSEEK - Bitstream is not seekable. -
        • -
      • OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. -
        • -
      • OV_EREAD - A read from media returned an error. -
        • -
      • OV_EFAULT - Internal logic fault; indicates a bug or heap/stack - corruption. -
        • -
      • OV_EOF - Indicates stream is at end of file immediately after a seek - (making crosslap impossible as there's no preceeding decode state to crosslap). -
        • -
      • OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. -
        • -
      • -
    - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_tell.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_tell.html deleted file mode 100644 index a9bbe26..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_tell.html +++ /dev/null @@ -1,63 +0,0 @@ - - - -Vorbisfile - function - ov_time_tell - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_tell

    - -

    declared in "vorbis/vorbisfile.h";

    - -

    Returns the current decoding offset in seconds. - -

    - - - - -
    -
    
-double ov_time_tell(OggVorbis_File *vf);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    - - -

    Return Values

    -
    -
  • n indicates the current decoding time offset in seconds.
    • -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist.
    • -
    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_total.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_total.html deleted file mode 100644 index d691dea..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/ov_time_total.html +++ /dev/null @@ -1,67 +0,0 @@ - - - -Vorbisfile - function - ov_time_total - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    ov_time_total

    - -

    declared in "vorbis/vorbisfile.h";

    - - -

    Returns the total time in seconds of the physical bitstream or a specified logical bitstream. - - -

    - - - - -
    -
    
-double ov_time_total(OggVorbis_File *vf,int i);
-
    -
    - -

    Parameters

    -
    -
    vf
    -
    A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile -functions.
    -
    i
    -
    Link to the desired logical bitstream. To retrieve the time total for the entire physical bitstream, this parameter should be set to -1.
    -
    - - -

    Return Values

    -
    -
  • OV_EINVAL means that the argument was invalid. In this case, the requested bitstream did not exist or the bitstream is nonseekable.
    • -
  • n total length in seconds of content if i=-1.
    • -
  • n length in seconds of logical bitstream if i=0 to n.
    • -
    -

    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/overview.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/overview.html deleted file mode 100644 index cf49119..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/overview.html +++ /dev/null @@ -1,61 +0,0 @@ - - - -Vorbisfile - API Overview - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Vorbisfile API Overview

    - -

    The makeup of the Vorbisfile libvorbisfile library API is relatively -simple. It revolves around a single file resource. This file resource is -passed to libvorbisfile, where it is opened, manipulated, and closed, -in the form of an OggVorbis_File -struct. -

    -The Vorbisfile API consists of the following functional categories: -

    -

    -

    -In addition, the following subjects deserve attention additional to -the above general overview: -

    -

    -

    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/reference.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/reference.html deleted file mode 100644 index c18ab2b..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/reference.html +++ /dev/null @@ -1,84 +0,0 @@ - - - -Vorbisfile API Reference - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Vorbisfile API Reference

    - -

    -Data Structures
    -OggVorbis_File
    -vorbis_comment
    -vorbis_info
    -ov_callbacks
    -
    -Setup/Teardown
    -ov_fopen()
    -ov_open()
    -ov_open_callbacks()
    -ov_clear()
    -ov_test()
    -ov_test_callbacks()
    -ov_test_open()
    -
    -Decoding
    -ov_read()
    -ov_read_float()
    -ov_read_filter()
    -ov_crosslap()
    -
    -Seeking
    -ov_raw_seek()
    -ov_pcm_seek()
    -ov_time_seek()
    -ov_pcm_seek_page()
    -ov_time_seek_page()

    -ov_raw_seek_lap()
    -ov_pcm_seek_lap()
    -ov_time_seek_lap()
    -ov_pcm_seek_page_lap()
    -ov_time_seek_page_lap()
    -
    -File Information
    -ov_bitrate()
    -ov_bitrate_instant()
    -ov_streams()
    -ov_seekable()
    -ov_serialnumber()
    -ov_raw_total()
    -ov_pcm_total()
    -ov_time_total()
    -ov_raw_tell()
    -ov_pcm_tell()
    -ov_time_tell()
    -ov_info()
    -ov_comment()
    -
    -Return Codes
    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/return.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/return.html deleted file mode 100644 index 5349a2f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/return.html +++ /dev/null @@ -1,77 +0,0 @@ - - - -Vorbisfile - Return Codes - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Return Codes

    - -

    - -The following return codes are #defined in "vorbis/codec.h" -may be returned by libvorbisfile. Descriptions of a code relevant to -a specific function are found in the reference description of that -function. - -

    - -
    OV_FALSE
    -
    Not true, or no data available
    - -
    OV_HOLE
    -
    Vorbisfile encoutered missing or corrupt data in the bitstream. Recovery -is normally automatic and this return code is for informational purposes only.
    - -
    OV_EREAD
    -
    Read error while fetching compressed data for decode
    - -
    OV_EFAULT
    -
    Internal inconsistency in decode state. Continuing is likely not possible.
    - -
    OV_EIMPL
    -
    Feature not implemented
    - -
    OV_EINVAL
    -
    Either an invalid argument, or incompletely initialized argument passed to libvorbisfile call
    - -
    OV_ENOTVORBIS
    -
    The given file/data was not recognized as Ogg Vorbis data.
    - -
    OV_EBADHEADER
    -
    The file/data is apparently an Ogg Vorbis stream, but contains a corrupted or undecipherable header.
    - -
    OV_EVERSION
    -
    The bitstream format revision of the given stream is not supported.
    - -
    OV_EBADLINK
    -
    The given link exists in the Vorbis data stream, but is not decipherable due to garbacge or corruption.
    - -
    OV_ENOSEEK
    -
    The given stream is not seekable
    - -
    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekexample.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekexample.html deleted file mode 100644 index ef0259a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekexample.html +++ /dev/null @@ -1,152 +0,0 @@ - - - -vorbisfile - Example Code - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Example Code: seeking

    - -

    -The following is a run-through of the seeking example program supplied -with vorbisfile - seeking_test.c. -This program tests the vorbisfile ov_time_seek function by seeking to random points within the file. - -

    -First, relevant headers, including vorbis-specific "codec.h" and "vorbisfile.h" have to be included. - -

    - - - - -
    -
    
-#include <stdlib.h>
-#include <stdio.h>
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
    -
    - -

    Inside main(), we declare our primary OggVorbis_File structure. We also declare other helpful variables to track our progress within the file. -

    - - - - -
    -
    
-int main(){
-  OggVorbis_File ov;
-  int i;
-
    -
    - -

    This example takes its input on stdin which is in 'text' mode by default under Windows; this will corrupt the input data unless set to binary mode. This applies only to Windows. -

    - - - - -
    -
    
-#ifdef _WIN32 /* We need to set stdin to binary mode under Windows */
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
    -
    - -

    ov_open() must be -called to initialize the OggVorbis_File structure with default values. -ov_open_callbacks() also checks to ensure that we're reading Vorbis format and not something else. - -

    - - - - -
    -
    
-  if(ov_open_callbacks(stdin,&ov,NULL,-1, OV_CALLBACKS_NOCLOSE)<0){
-    printf("Could not open input as an OggVorbis file.\n\n");
-    exit(1);
-  }
-
-
    -
    - -

    -First we check to make sure the stream is seekable using ov_seekable. - -

    Then we seek to 100 random spots in the bitstream using ov_time_seek with randomly generated values. - -

    - - - - -
    -
    
-  
-  /* print details about each logical bitstream in the input */
-  if(ov_seekable(&ov)){
-    double length=ov_time_total(&ov,-1);
-    printf("testing seeking to random places in %g seconds....\n",length);
-    for(i=0;i<100;i++){
-      double val=(double)rand()/RAND_MAX*length;
-      ov_time_seek(&ov,val);
-      printf("\r\t%d [%gs]...     ",i,val);
-      fflush(stdout);
-    }
-    
-    printf("\r                                   \nOK.\n\n");
-  }else{
-    printf("Standard input was not seekable.\n");
-  }
-  
-
    -
    -

    -When we're done seeking, we need to call ov_clear() to release the bitstream. - -

    - - - - -
    -
    
-  ov_clear(&ov);
-  return 0;
-}
-
    -
    - -

    -The full source for seeking_test.c can be found with the vorbis -distribution in seeking_test.c. - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking.html deleted file mode 100644 index 2f3947a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking.html +++ /dev/null @@ -1,107 +0,0 @@ - - - -Vorbisfile - Seeking - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Seeking

    -

    Seeking functions allow you to specify a specific point in the stream to begin or continue decoding. -

    -All libvorbisfile seeking routines are declared in "vorbis/vorbisfile.h". - -

    Certain seeking functions are best suited to different situations. -When speed is important and exact positioning isn't required, -page-level seeking should be used. Note also that Vorbis files do not -necessarily start at a sample number or time offset of zero. Do not -be surprised if a file begins at a positive offset of several minutes -or hours, such as would happen if a large stream (such as a concert -recording) is chopped into multiple separate files. Requesting to -seek to a position before the beginning of such a file will seek to -the position where audio begins. - -

    As of vorbisfile version 1.68, seeking also optionally provides -automatic crosslapping to eliminate clicks and other discontinuity -artifacts at seeking boundaries. This fetaure is of particular -interest to player and game developers implementing dynamic music and -audio engines, or others looking for smooth transitions within a -single sample or across multiple samples.

    - -

    Naturally, seeking is available only within a seekable file or -stream. Seeking functions will return OV_ENOSEEK on -nonseekable files and streams. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    functionpurpose
    ov_raw_seekThis function seeks to a position specified in the compressed bitstream, specified in bytes.
    ov_pcm_seekThis function seeks to a specific audio sample number, specified in pcm samples.
    ov_pcm_seek_pageThis function seeks to the closest page preceding the specified audio sample number, specified in pcm samples.
    ov_time_seekThis function seeks to the specific time location in the bitstream, specified in seconds
    ov_time_seek_pageThis function seeks to the closest page preceding the specified time position in the bitstream
    ov_raw_seek_lapThis function seeks to a position specified in the compressed bitstream, specified in bytes. The boundary between the old and new playback positions is crosslapped to eliminate discontinuities.
    ov_pcm_seek_lapThis function seeks to a specific audio sample number, specified in pcm samples. The boundary between the old and new playback positions is crosslapped to eliminate discontinuities.
    ov_pcm_seek_page_lapThis function seeks to the closest page preceding the specified audio sample number, specified in pcm samples. The boundary between the old and new playback positions is crosslapped to eliminate discontinuities.
    ov_time_seek_lapThis function seeks to the specific time location in the bitstream, specified in seconds. The boundary between the old and new playback positions is crosslapped to eliminate discontinuities.
    ov_time_seek_page_lapThis function seeks to the closest page preceding the specified time position in the bitstream. The boundary between the old and new playback positions is crosslapped to eliminate discontinuities.
    - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_example_c.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_example_c.html deleted file mode 100644 index 101745f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_example_c.html +++ /dev/null @@ -1,86 +0,0 @@ - - - -vorbisfile - seeking_test.c - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    seeking_test.c

    - -

    -The example program source: - -

    - - - - -
    -
    
-
-#include 
-#include 
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
-int main(){
-  OggVorbis_File ov;
-  int i;
-
-#ifdef _WIN32 /* We need to set stdin to binary mode under Windows */
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
-  /* open the file/pipe on stdin */
-  if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)==-1){
-    printf("Could not open input as an OggVorbis file.\n\n");
-    exit(1);
-  }
-  
-  /* print details about each logical bitstream in the input */
-  if(ov_seekable(&ov)){
-    double length=ov_time_total(&ov,-1);
-    printf("testing seeking to random places in %g seconds....\n",length);
-    for(i=0;i<100;i++){
-      double val=(double)rand()/RAND_MAX*length;
-      ov_time_seek(&ov,val);
-      printf("\r\t%d [%gs]...     ",i,val);
-      fflush(stdout);
-    }
-    
-    printf("\r                                   \nOK.\n\n");
-  }else{
-    printf("Standard input was not seekable.\n");
-  }
-
-  ov_clear(&ov);
-  return 0;
-}
-
-
    -
    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_test_c.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_test_c.html deleted file mode 100644 index 101745f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seeking_test_c.html +++ /dev/null @@ -1,86 +0,0 @@ - - - -vorbisfile - seeking_test.c - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    seeking_test.c

    - -

    -The example program source: - -

    - - - - -
    -
    
-
-#include 
-#include 
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
-int main(){
-  OggVorbis_File ov;
-  int i;
-
-#ifdef _WIN32 /* We need to set stdin to binary mode under Windows */
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
-  /* open the file/pipe on stdin */
-  if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)==-1){
-    printf("Could not open input as an OggVorbis file.\n\n");
-    exit(1);
-  }
-  
-  /* print details about each logical bitstream in the input */
-  if(ov_seekable(&ov)){
-    double length=ov_time_total(&ov,-1);
-    printf("testing seeking to random places in %g seconds....\n",length);
-    for(i=0;i<100;i++){
-      double val=(double)rand()/RAND_MAX*length;
-      ov_time_seek(&ov,val);
-      printf("\r\t%d [%gs]...     ",i,val);
-      fflush(stdout);
-    }
-    
-    printf("\r                                   \nOK.\n\n");
-  }else{
-    printf("Standard input was not seekable.\n");
-  }
-
-  ov_clear(&ov);
-  return 0;
-}
-
-
    -
    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekingexample.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekingexample.html deleted file mode 100644 index 73c02ac..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/seekingexample.html +++ /dev/null @@ -1,203 +0,0 @@ - - - -vorbisfile - Example Code - - - - - - - - - -

    vorbisfile documentation

    vorbisfile version 1.25 - 20000615

    - -

    Example Code

    - -

    -The following is a run-through of the decoding example program supplied -with vorbisfile - vorbisfile_example.c. -This program takes a vorbis bitstream from stdin and writes raw pcm to stdout. - -

    -First, relevant headers, including vorbis-specific "codec.h" and "vorbisfile.h" have to be included. - -

    - - - - -
    -
    
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
    -
    -

    -We also have to make a concession to Windows users here. If we are using windows for decoding, we must declare these libraries so that we can set stdin/stdout to binary. -

    - - - - -
    -
    
-#ifdef _WIN32
-#include <io.h>
-#include <fcntl.h>
-#endif
-
    -
    -

    -Next, a buffer for the pcm audio output is declared. - -

    - - - - -
    -
    
-char pcmout[4096];
-
    -
    - -

    Inside main(), we declare our primary OggVorbis_File structure. We also declare a few other helpful variables to track out progress within the file. -Also, we make our final concession to Windows users by setting the stdin and stdout to binary mode. -

    - - - - -
    -
    
-int main(int argc, char **argv){
-  OggVorbis_File vf;
-  int eof=0;
-  int current_section;
-
-#ifdef _WIN32
-  _setmode( _fileno( stdin ), _O_BINARY );
-#endif
-
    -
    - -

    ov_open_callbacks() must be -called to initialize the OggVorbis_File structure with default values. -ov_open_callbacks() also checks to ensure that we're reading Vorbis format and not something else. - -

    - - - - -
    -
    
-  if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) {
-      fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
-      exit(1);
-  }
-
-
    -
    - -

    -We're going to pull the channel and bitrate info from the file using ov_info() and show them to the user. -We also want to pull out and show the user a comment attached to the file using ov_comment(). - -

    - - - - -
    -
    
-  {
-    char **ptr=ov_comment(&vf,-1)->user_comments;
-    vorbis_info *vi=ov_info(&vf,-1);
-    while(*ptr){
-      fprintf(stderr,"%s\n",*ptr);
-      ++ptr;
-    }
-    fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
-    fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
-  }
-  
-
    -
    - -

    -Here's the read loop: - -

    - - - - -
    -
    
-
-  while(!eof){
-    long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤t_section);
-    switch(ret){
-    case 0:
-      /* EOF */
-      eof=1;
-      break;
-    case -1:
-      break;
-    default:
-      fwrite(pcmout,1,ret,stdout);
-      break;
-    }
-  }
-  
-
    -
    - -

    -The code is reading blocks of data using ov_read(). -Based on the value returned, we know if we're at the end of the file or have invalid data. If we have valid data, we write it to the pcm output. - -

    -Now that we've finished playing, we can pack up and go home. It's important to call ov_clear() when we're finished. - -

    - - - - -
    -
    
-
-  ov_clear(&vf);
-    
-  fprintf(stderr,"Done.\n");
-  return(0);
-}
-
    -
    - -

    -The full source for vorbisfile_example.c can be found with the vorbis -distribution in vorbisfile_example.c. - -

    -

    - - - - - - - - -

    copyright © 2000 vorbis team

    Ogg Vorbis
    team@vorbis.org

    vorbisfile documentation

    vorbisfile version 1.25 - 20000615

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/style.css b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/style.css deleted file mode 100644 index 81cf417..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/style.css +++ /dev/null @@ -1,7 +0,0 @@ -BODY { font-family: Helvetica, sans-serif } -TD { font-family: Helvetica, sans-serif } -P { font-family: Helvetica, sans-serif } -H1 { font-family: Helvetica, sans-serif } -H2 { font-family: Helvetica, sans-serif } -H4 { font-family: Helvetica, sans-serif } -P.tiny { font-size: 8pt } diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/threads.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/threads.html deleted file mode 100644 index ebfb9f9..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/threads.html +++ /dev/null @@ -1,50 +0,0 @@ - - - -Vorbisfile - Thread Safety - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    Thread Safety

    - -Vorbisfile's libvorbisfile may be used safely in a threading environment -so long as thread access to individual OggVorbis_File instances is serialized. -
      - -
    • Only one thread at a time may enter a function that takes a given OggVorbis_File instance, even if the -functions involved appear to be read-only.

      - -

    • Multiple threads may enter -libvorbisfile at a given time, so long as each thread's function calls -are using different OggVorbis_File -instances.

      - -

    • Any one OggVorbis_File instance may be used safely from multiple threads so long as only one thread at a time is making calls using that instance.

      -

    - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_comment.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_comment.html deleted file mode 100644 index ba81ad7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_comment.html +++ /dev/null @@ -1,70 +0,0 @@ - - - -Vorbisfile - datatype - vorbis_comment - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    vorbis_comment

    - -

    declared in "vorbis/codec.h"

    - -

    -The vorbis_comment structure defines an Ogg Vorbis comment. -

    -Only the fields the program needs must be defined. If a field isn't -defined by the application, it will either be blank (if it's a string value) -or set to some reasonable default (usually 0). -

    - - - - - -
    -
    typedef struct vorbis_comment{
-  /* unlimited user comment fields. */
-  char **user_comments;
-  int  *comment_lengths;
-  int  comments;
-  char *vendor;
-
-} vorbis_comment;
    -
    - -

    Parameters

    -
    -
    user_comments
    -
    Unlimited user comment array. The individual strings in the array are 8 bit clean, by the Vorbis specification, and as such the comment_lengths array should be consulted to determine string length. For convenience, each string is also NULL-terminated by the decode library (although Vorbis comments are not NULL terminated within the bitstream itself).
    -
    comment_lengths
    -
    An int array that stores the length of each comment string
    -
    comments
    -
    Int signifying number of user comments in user_comments field.
    -
    vendor
    -
    Information about the creator of the file. Stored in a standard C 0-terminated string.
    -
    - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_info.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_info.html deleted file mode 100644 index 54bd621..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbis_info.html +++ /dev/null @@ -1,80 +0,0 @@ - - - -Vorbisfile - datatype - vorbis_info - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    vorbis_info

    - -

    declared in "vorbis/codec.h"

    - -

    -The vorbis_info structure contains basic information about the audio in a vorbis bitstream. -

    - - - - - -
    -
    typedef struct vorbis_info{
-  int version;
-  int channels;
-  long rate;
-  
-  long bitrate_upper;
-  long bitrate_nominal;
-  long bitrate_lower;
-  long bitrate_window;
-
-  void *codec_setup;
-
-} vorbis_info;
    -
    - -

    Relevant Struct Members

    -
    -
    version
    -
    Vorbis encoder version used to create this bitstream.
    -
    channels
    -
    Int signifying number of channels in bitstream.
    -
    rate
    -
    Sampling rate of the bitstream.
    -
    bitrate_upper
    -
    Specifies the upper limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_lower parameters, the stream is fixed bitrate. May be unset if no limit exists.
    -
    bitrate_nominal
    -
    Specifies the average bitrate for a VBR bitstream. May be unset. If the bitrate_upper and bitrate_lower parameters match, the stream is fixed bitrate.
    -
    bitrate_lower
    -
    Specifies the lower limit in a VBR bitstream. If the value matches the bitrate_nominal and bitrate_upper parameters, the stream is fixed bitrate. May be unset if no limit exists.
    -
    bitrate_window
    -
    Currently unset.
    - -
    codec_setup
    -
    Internal structure that contains the detailed/unpacked configuration for decoding the current Vorbis bitstream.
    -
    - - -

    -
    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbisfile_example_c.html b/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbisfile_example_c.html deleted file mode 100644 index f9f1873..0000000 --- a/ExternalLibs/libvorbis-1.3.1/doc/vorbisfile/vorbisfile_example_c.html +++ /dev/null @@ -1,106 +0,0 @@ - - - -vorbisfile - vorbisfile_example.c - - - - - - - - - -

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - -

    vorbisfile_example.c

    - -

    -The example program source: - -

    - - - - -
    -
    
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include "vorbis/codec.h"
-#include "vorbis/vorbisfile.h"
-
-#ifdef _WIN32
-#include <io.h>
-#include <fcntl.h>
-#endif
-
-char pcmout[4096];
-
-int main(int argc, char **argv){
-  OggVorbis_File vf;
-  int eof=0;
-  int current_section;
-
-#ifdef _WIN32
-  _setmode( _fileno( stdin ), _O_BINARY );
-  _setmode( _fileno( stdout ), _O_BINARY );
-#endif
-
-  if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) {
-      fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n");
-      exit(1);
-  }
-
-  {
-    char **ptr=ov_comment(&vf,-1)->user_comments;
-    vorbis_info *vi=ov_info(&vf,-1);
-    while(*ptr){
-      fprintf(stderr,"%s\n",*ptr);
-      ++ptr;
-    }
-    fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate);
-    fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor);
-  }
-  
-  while(!eof){
-    long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤t_section);
-    if (ret == 0) {
-      /* EOF */
-      eof=1;
-    } else if (ret < 0) {
-      /* error in the stream.  Not a problem, just reporting it in
-	 case we (the app) cares.  In this case, we don't. */
-    } else {
-      /* we don't bother dealing with sample rate changes, etc, but
-	 you'll have to */
-      fwrite(pcmout,1,ret,stdout);
-    }
-  }
-
-  ov_clear(&vf);
-    
-  fprintf(stderr,"Done.\n");
-  return(0);
-}
-
-
    -
    - - -

    -

    - - - - - - - - -

    copyright © 2007 Xiph.org

    Ogg Vorbis
    team@vorbis.org

    Vorbisfile documentation

    vorbisfile version 1.2.0 - 20070723

    - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/doc/vorbisword2.png b/ExternalLibs/libvorbis-1.3.1/doc/vorbisword2.png deleted file mode 100644 index 2d050aa..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/vorbisword2.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/wait.png b/ExternalLibs/libvorbis-1.3.1/doc/wait.png deleted file mode 100644 index 39d9c8a..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/wait.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/white-xifish.png b/ExternalLibs/libvorbis-1.3.1/doc/white-xifish.png deleted file mode 100644 index 409b9a6..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/white-xifish.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/window1.png b/ExternalLibs/libvorbis-1.3.1/doc/window1.png deleted file mode 100644 index 968bd3f..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/window1.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/window2.png b/ExternalLibs/libvorbis-1.3.1/doc/window2.png deleted file mode 100644 index bd8e3bb..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/window2.png and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/doc/xifish.pdf b/ExternalLibs/libvorbis-1.3.1/doc/xifish.pdf deleted file mode 100644 index 631ce5c..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/doc/xifish.pdf and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/examples/Makefile.am b/ExternalLibs/libvorbis-1.3.1/examples/Makefile.am deleted file mode 100644 index 4518976..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/Makefile.am +++ /dev/null @@ -1,34 +0,0 @@ -## Process this file with automake to produce Makefile.in - -AUTOMAKE_OPTIONS = foreign - -INCLUDES = -I$(top_srcdir)/include @OGG_CFLAGS@ - -noinst_PROGRAMS = decoder_example encoder_example chaining_example\ - vorbisfile_example seeking_example - -EXTRA_DIST = frameview.pl - -# uncomment to build static executables from the example code -#LDFLAGS = -all-static - -decoder_example_SOURCES = decoder_example.c -decoder_example_LDADD = $(top_builddir)/lib/libvorbis.la - -encoder_example_SOURCES = encoder_example.c -encoder_example_LDADD = $(top_builddir)/lib/libvorbisenc.la $(top_builddir)/lib/libvorbis.la - -chaining_example_SOURCES = chaining_example.c -chaining_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la - -vorbisfile_example_SOURCES = vorbisfile_example.c -vorbisfile_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la - -seeking_example_SOURCES = seeking_example.c -seeking_example_LDADD = $(top_builddir)/lib/libvorbisfile.la $(top_builddir)/lib/libvorbis.la - -debug: - $(MAKE) all CFLAGS="@DEBUG@" - -profile: - $(MAKE) all CFLAGS="@PROFILE@" diff --git a/ExternalLibs/libvorbis-1.3.1/examples/Makefile.in b/ExternalLibs/libvorbis-1.3.1/examples/Makefile.in deleted file mode 100644 index 2488755..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/Makefile.in +++ /dev/null @@ -1,524 +0,0 @@ -# Makefile.in generated by automake 1.10.2 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, -# 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. -# This Makefile.in is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -@SET_MAKE@ - -VPATH = @srcdir@ -pkgdatadir = $(datadir)/@PACKAGE@ -pkglibdir = $(libdir)/@PACKAGE@ -pkgincludedir = $(includedir)/@PACKAGE@ -am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd -install_sh_DATA = $(install_sh) -c -m 644 -install_sh_PROGRAM = $(install_sh) -c -install_sh_SCRIPT = $(install_sh) -c -INSTALL_HEADER = $(INSTALL_DATA) -transform = $(program_transform_name) -NORMAL_INSTALL = : -PRE_INSTALL = : -POST_INSTALL = : -NORMAL_UNINSTALL = : -PRE_UNINSTALL = : -POST_UNINSTALL = : -build_triplet = @build@ -host_triplet = @host@ -target_triplet = @target@ -noinst_PROGRAMS = decoder_example$(EXEEXT) encoder_example$(EXEEXT) \ - 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* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: illustrate simple use of chained bitstream and vorbisfile.a - last mod: $Id: chaining_example.c 16243 2009-07-10 02:49:31Z xiphmont $ - - ********************************************************************/ - -#include -#include -#include - -#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ -#include -#include -#endif - -int main(){ - OggVorbis_File ov; - int i; - -#ifdef _WIN32 /* We need to set stdin to binary mode. Damn windows. */ - /* Beware the evil ifdef. We avoid these where we can, but this one we - cannot. Don't add any more, you'll probably go to hell if you do. */ - _setmode( _fileno( stdin ), _O_BINARY ); -#endif - - /* open the file/pipe on stdin */ - if(ov_open_callbacks(stdin,&ov,NULL,-1,OV_CALLBACKS_NOCLOSE)<0){ - printf("Could not open input as an OggVorbis file.\n\n"); - exit(1); - } - - /* print details about each logical bitstream in the input */ - if(ov_seekable(&ov)){ - printf("Input bitstream contained %ld logical bitstream section(s).\n", - ov_streams(&ov)); - printf("Total bitstream samples: %ld\n\n", - (long)ov_pcm_total(&ov,-1)); - printf("Total bitstream playing time: %ld seconds\n\n", - (long)ov_time_total(&ov,-1)); - - }else{ - printf("Standard input was not seekable.\n" - "First logical bitstream information:\n\n"); - } - - for(i=0;irate,vi->channels,ov_bitrate(&ov,i)/1000, - ov_serialnumber(&ov,i)); - printf("\t\theader length: %ld bytes\n",(long) - (ov.dataoffsets[i]-ov.offsets[i])); - printf("\t\tcompressed length: %ld bytes\n",(long)(ov_raw_total(&ov,i))); - printf("\t\tplay time: %lds\n",(long)ov_time_total(&ov,i)); - } - - ov_clear(&ov); - return 0; -} - diff --git a/ExternalLibs/libvorbis-1.3.1/examples/decoder_example.c b/ExternalLibs/libvorbis-1.3.1/examples/decoder_example.c deleted file mode 100644 index 1cd7e34..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/decoder_example.c +++ /dev/null @@ -1,314 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: simple example decoder - last mod: $Id: decoder_example.c 16243 2009-07-10 02:49:31Z xiphmont $ - - ********************************************************************/ - -/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to - stdout. Decodes simple and chained OggVorbis files from beginning - to end. Vorbisfile.a is somewhat more complex than the code below. */ - -/* Note that this is POSIX, not ANSI code */ - -#include -#include -#include -#include - -#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ -#include -#include -#endif - -#if defined(__MACOS__) && defined(__MWERKS__) -#include /* CodeWarrior's Mac "command-line" support */ -#endif - -ogg_int16_t convbuffer[4096]; /* take 8k out of the data segment, not the stack */ -int convsize=4096; - -extern void _VDBG_dump(void); - -int main(){ - ogg_sync_state oy; /* sync and verify incoming physical bitstream */ - ogg_stream_state os; /* take physical pages, weld into a logical - stream of packets */ - ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */ - ogg_packet op; /* one raw packet of data for decode */ - - vorbis_info vi; /* struct that stores all the static vorbis bitstream - settings */ - vorbis_comment vc; /* struct that stores all the bitstream user comments */ - vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */ - vorbis_block vb; /* local working space for packet->PCM decode */ - - char *buffer; - int bytes; - -#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */ - /* Beware the evil ifdef. We avoid these where we can, but this one we - cannot. Don't add any more, you'll probably go to hell if you do. */ - _setmode( _fileno( stdin ), _O_BINARY ); - _setmode( _fileno( stdout ), _O_BINARY ); -#endif - -#if defined(macintosh) && defined(__MWERKS__) - { - int argc; - char **argv; - argc=ccommand(&argv); /* get a "command line" from the Mac user */ - /* this also lets the user set stdin and stdout */ - } -#endif - - /********** Decode setup ************/ - - ogg_sync_init(&oy); /* Now we can read pages */ - - while(1){ /* we repeat if the bitstream is chained */ - int eos=0; - int i; - - /* grab some data at the head of the stream. We want the first page - (which is guaranteed to be small and only contain the Vorbis - stream initial header) We need the first page to get the stream - serialno. */ - - /* submit a 4k block to libvorbis' Ogg layer */ - buffer=ogg_sync_buffer(&oy,4096); - bytes=fread(buffer,1,4096,stdin); - ogg_sync_wrote(&oy,bytes); - - /* Get the first page. */ - if(ogg_sync_pageout(&oy,&og)!=1){ - /* have we simply run out of data? If so, we're done. */ - if(bytes<4096)break; - - /* error case. Must not be Vorbis data */ - fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n"); - exit(1); - } - - /* Get the serial number and set up the rest of decode. */ - /* serialno first; use it to set up a logical stream */ - ogg_stream_init(&os,ogg_page_serialno(&og)); - - /* extract the initial header from the first page and verify that the - Ogg bitstream is in fact Vorbis data */ - - /* I handle the initial header first instead of just having the code - read all three Vorbis headers at once because reading the initial - header is an easy way to identify a Vorbis bitstream and it's - useful to see that functionality seperated out. */ - - vorbis_info_init(&vi); - vorbis_comment_init(&vc); - if(ogg_stream_pagein(&os,&og)<0){ - /* error; stream version mismatch perhaps */ - fprintf(stderr,"Error reading first page of Ogg bitstream data.\n"); - exit(1); - } - - if(ogg_stream_packetout(&os,&op)!=1){ - /* no page? must not be vorbis */ - fprintf(stderr,"Error reading initial header packet.\n"); - exit(1); - } - - if(vorbis_synthesis_headerin(&vi,&vc,&op)<0){ - /* error case; not a vorbis header */ - fprintf(stderr,"This Ogg bitstream does not contain Vorbis " - "audio data.\n"); - exit(1); - } - - /* At this point, we're sure we're Vorbis. We've set up the logical - (Ogg) bitstream decoder. Get the comment and codebook headers and - set up the Vorbis decoder */ - - /* The next two packets in order are the comment and codebook headers. - They're likely large and may span multiple pages. Thus we read - and submit data until we get our two packets, watching that no - pages are missing. If a page is missing, error out; losing a - header page is the only place where missing data is fatal. */ - - i=0; - while(i<2){ - while(i<2){ - int result=ogg_sync_pageout(&oy,&og); - if(result==0)break; /* Need more data */ - /* Don't complain about missing or corrupt data yet. We'll - catch it at the packet output phase */ - if(result==1){ - ogg_stream_pagein(&os,&og); /* we can ignore any errors here - as they'll also become apparent - at packetout */ - while(i<2){ - result=ogg_stream_packetout(&os,&op); - if(result==0)break; - if(result<0){ - /* Uh oh; data at some point was corrupted or missing! - We can't tolerate that in a header. Die. */ - fprintf(stderr,"Corrupt secondary header. Exiting.\n"); - exit(1); - } - result=vorbis_synthesis_headerin(&vi,&vc,&op); - if(result<0){ - fprintf(stderr,"Corrupt secondary header. Exiting.\n"); - exit(1); - } - i++; - } - } - } - /* no harm in not checking before adding more */ - buffer=ogg_sync_buffer(&oy,4096); - bytes=fread(buffer,1,4096,stdin); - if(bytes==0 && i<2){ - fprintf(stderr,"End of file before finding all Vorbis headers!\n"); - exit(1); - } - ogg_sync_wrote(&oy,bytes); - } - - /* Throw the comments plus a few lines about the bitstream we're - decoding */ - { - char **ptr=vc.user_comments; - while(*ptr){ - fprintf(stderr,"%s\n",*ptr); - ++ptr; - } - fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi.channels,vi.rate); - fprintf(stderr,"Encoded by: %s\n\n",vc.vendor); - } - - convsize=4096/vi.channels; - - /* OK, got and parsed all three headers. Initialize the Vorbis - packet->PCM decoder. */ - if(vorbis_synthesis_init(&vd,&vi)==0){ /* central decode state */ - vorbis_block_init(&vd,&vb); /* local state for most of the decode - so multiple block decodes can - proceed in parallel. We could init - multiple vorbis_block structures - for vd here */ - - /* The rest is just a straight decode loop until end of stream */ - while(!eos){ - while(!eos){ - int result=ogg_sync_pageout(&oy,&og); - if(result==0)break; /* need more data */ - if(result<0){ /* missing or corrupt data at this page position */ - fprintf(stderr,"Corrupt or missing data in bitstream; " - "continuing...\n"); - }else{ - ogg_stream_pagein(&os,&og); /* can safely ignore errors at - this point */ - while(1){ - result=ogg_stream_packetout(&os,&op); - - if(result==0)break; /* need more data */ - if(result<0){ /* missing or corrupt data at this page position */ - /* no reason to complain; already complained above */ - }else{ - /* we have a packet. Decode it */ - float **pcm; - int samples; - - if(vorbis_synthesis(&vb,&op)==0) /* test for success! */ - vorbis_synthesis_blockin(&vd,&vb); - /* - - **pcm is a multichannel float vector. In stereo, for - example, pcm[0] is left, and pcm[1] is right. samples is - the size of each channel. Convert the float values - (-1.<=range<=1.) to whatever PCM format and write it out */ - - while((samples=vorbis_synthesis_pcmout(&vd,&pcm))>0){ - int j; - int clipflag=0; - int bout=(samples32767){ - val=32767; - clipflag=1; - } - if(val<-32768){ - val=-32768; - clipflag=1; - } - *ptr=val; - ptr+=vi.channels; - } - } - - if(clipflag) - fprintf(stderr,"Clipping in frame %ld\n",(long)(vd.sequence)); - - - fwrite(convbuffer,2*vi.channels,bout,stdout); - - vorbis_synthesis_read(&vd,bout); /* tell libvorbis how - many samples we - actually consumed */ - } - } - } - if(ogg_page_eos(&og))eos=1; - } - } - if(!eos){ - buffer=ogg_sync_buffer(&oy,4096); - bytes=fread(buffer,1,4096,stdin); - ogg_sync_wrote(&oy,bytes); - if(bytes==0)eos=1; - } - } - - /* ogg_page and ogg_packet structs always point to storage in - libvorbis. They're never freed or manipulated directly */ - - vorbis_block_clear(&vb); - vorbis_dsp_clear(&vd); - }else{ - fprintf(stderr,"Error: Corrupt header during playback initialization.\n"); - } - - /* clean up this logical bitstream; before exit we see if we're - followed by another [chained] */ - - ogg_stream_clear(&os); - vorbis_comment_clear(&vc); - vorbis_info_clear(&vi); /* must be called last */ - } - - /* OK, clean up the framer */ - ogg_sync_clear(&oy); - - fprintf(stderr,"Done.\n"); - return(0); -} diff --git a/ExternalLibs/libvorbis-1.3.1/examples/encoder_example.c b/ExternalLibs/libvorbis-1.3.1/examples/encoder_example.c deleted file mode 100644 index 6eecf91..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/encoder_example.c +++ /dev/null @@ -1,252 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: simple example encoder - last mod: $Id: encoder_example.c 16946 2010-03-03 16:12:40Z xiphmont $ - - ********************************************************************/ - -/* takes a stereo 16bit 44.1kHz WAV file from stdin and encodes it into - a Vorbis bitstream */ - -/* Note that this is POSIX, not ANSI, code */ - -#include -#include -#include -#include -#include -#include - -#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ -#include -#include -#endif - -#if defined(__MACOS__) && defined(__MWERKS__) -#include /* CodeWarrior's Mac "command-line" support */ -#endif - -#define READ 1024 -signed char readbuffer[READ*4+44]; /* out of the data segment, not the stack */ - -int main(){ - ogg_stream_state os; /* take physical pages, weld into a logical - stream of packets */ - ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */ - ogg_packet op; /* one raw packet of data for decode */ - - vorbis_info vi; /* struct that stores all the static vorbis bitstream - settings */ - vorbis_comment vc; /* struct that stores all the user comments */ - - vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */ - vorbis_block vb; /* local working space for packet->PCM decode */ - - int eos=0,ret; - int i, founddata; - -#if defined(macintosh) && defined(__MWERKS__) - int argc = 0; - char **argv = NULL; - argc = ccommand(&argv); /* get a "command line" from the Mac user */ - /* this also lets the user set stdin and stdout */ -#endif - - /* we cheat on the WAV header; we just bypass 44 bytes (simplest WAV - header is 44 bytes) and assume that the data is 44.1khz, stereo, 16 bit - little endian pcm samples. This is just an example, after all. */ - -#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */ - /* if we were reading/writing a file, it would also need to in - binary mode, eg, fopen("file.wav","wb"); */ - /* Beware the evil ifdef. We avoid these where we can, but this one we - cannot. Don't add any more, you'll probably go to hell if you do. */ - _setmode( _fileno( stdin ), _O_BINARY ); - _setmode( _fileno( stdout ), _O_BINARY ); -#endif - - - /* we cheat on the WAV header; we just bypass the header and never - verify that it matches 16bit/stereo/44.1kHz. This is just an - example, after all. */ - - readbuffer[0] = '\0'; - for (i=0, founddata=0; i<30 && ! feof(stdin) && ! ferror(stdin); i++) - { - fread(readbuffer,1,2,stdin); - - if ( ! strncmp((char*)readbuffer, "da", 2) ){ - founddata = 1; - fread(readbuffer,1,6,stdin); - break; - } - } - - /********** Encode setup ************/ - - vorbis_info_init(&vi); - - /* choose an encoding mode. A few possibilities commented out, one - actually used: */ - - /********************************************************************* - Encoding using a VBR quality mode. The usable range is -.1 - (lowest quality, smallest file) to 1. (highest quality, largest file). - Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR - - ret = vorbis_encode_init_vbr(&vi,2,44100,.4); - - --------------------------------------------------------------------- - - Encoding using an average bitrate mode (ABR). - example: 44kHz stereo coupled, average 128kbps VBR - - ret = vorbis_encode_init(&vi,2,44100,-1,128000,-1); - - --------------------------------------------------------------------- - - Encode using a quality mode, but select that quality mode by asking for - an approximate bitrate. This is not ABR, it is true VBR, but selected - using the bitrate interface, and then turning bitrate management off: - - ret = ( vorbis_encode_setup_managed(&vi,2,44100,-1,128000,-1) || - vorbis_encode_ctl(&vi,OV_ECTL_RATEMANAGE2_SET,NULL) || - vorbis_encode_setup_init(&vi)); - - *********************************************************************/ - - ret=vorbis_encode_init_vbr(&vi,2,44100,0.1); - - /* do not continue if setup failed; this can happen if we ask for a - mode that libVorbis does not support (eg, too low a bitrate, etc, - will return 'OV_EIMPL') */ - - if(ret)exit(1); - - /* add a comment */ - vorbis_comment_init(&vc); - vorbis_comment_add_tag(&vc,"ENCODER","encoder_example.c"); - - /* set up the analysis state and auxiliary encoding storage */ - vorbis_analysis_init(&vd,&vi); - vorbis_block_init(&vd,&vb); - - /* set up our packet->stream encoder */ - /* pick a random serial number; that way we can more likely build - chained streams just by concatenation */ - srand(time(NULL)); - ogg_stream_init(&os,rand()); - - /* Vorbis streams begin with three headers; the initial header (with - most of the codec setup parameters) which is mandated by the Ogg - bitstream spec. The second header holds any comment fields. The - third header holds the bitstream codebook. We merely need to - make the headers, then pass them to libvorbis one at a time; - libvorbis handles the additional Ogg bitstream constraints */ - - { - ogg_packet header; - ogg_packet header_comm; - ogg_packet header_code; - - vorbis_analysis_headerout(&vd,&vc,&header,&header_comm,&header_code); - ogg_stream_packetin(&os,&header); /* automatically placed in its own - page */ - ogg_stream_packetin(&os,&header_comm); - ogg_stream_packetin(&os,&header_code); - - /* This ensures the actual - * audio data will start on a new page, as per spec - */ - while(!eos){ - int result=ogg_stream_flush(&os,&og); - if(result==0)break; - fwrite(og.header,1,og.header_len,stdout); - fwrite(og.body,1,og.body_len,stdout); - } - - } - - while(!eos){ - long i; - long bytes=fread(readbuffer,1,READ*4,stdin); /* stereo hardwired here */ - - if(bytes==0){ - /* end of file. this can be done implicitly in the mainline, - but it's easier to see here in non-clever fashion. - Tell the library we're at end of stream so that it can handle - the last frame and mark end of stream in the output properly */ - vorbis_analysis_wrote(&vd,0); - - }else{ - /* data to encode */ - - /* expose the buffer to submit data */ - float **buffer=vorbis_analysis_buffer(&vd,READ); - - /* uninterleave samples */ - for(i=0;i'AnalyzerGraph'); -my $Xname=$toplevel->Class; -$toplevel->optionAdd("$Xname.geometry", "800x600",20); - -my $geometry=$toplevel->optionGet('geometry',''); -$geometry=~/^(\d+)x(\d+)/; - -$toplevel->configure(-width=>$1); -$toplevel->configure(-height=>$2); - - - - - -$toplevel->optionAdd("$Xname.background", "#4fc627",20); -$toplevel->optionAdd("$Xname*highlightBackground", "#80c0d3",20); -$toplevel->optionAdd("$Xname.Panel.background", "#4fc627",20); -$toplevel->optionAdd("$Xname.Panel.foreground", "#d0d0d0",20); -$toplevel->optionAdd("$Xname.Panel.font", - '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20); -$toplevel->optionAdd("$Xname*Statuslabel.font", - '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20); -$toplevel->optionAdd("$Xname*Statuslabel.foreground", "#606060"); -$toplevel->optionAdd("$Xname*Status.font", - '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20); - -$toplevel->optionAdd("$Xname*AlertDetail.font", - '-*-helvetica-medium-r-*-*-10-*-*-*-*-*-*-*',20); - - -$toplevel->optionAdd("$Xname*background", "#d0d0d0",20); -$toplevel->optionAdd("$Xname*foreground", '#000000',20); - -$toplevel->optionAdd("$Xname*Button*background", "#f0d0b0",20); -$toplevel->optionAdd("$Xname*Button*foreground", '#000000',20); -$toplevel->optionAdd("$Xname*Button*borderWidth", '2',20); -$toplevel->optionAdd("$Xname*Button*relief", 'groove',20); -$toplevel->optionAdd("$Xname*Button*padY", 1,20); - -#$toplevel->optionAdd("$Xname*Scale*background", "#f0d0b0",20); -$toplevel->optionAdd("$Xname*Scale*foreground", '#000000',20); -$toplevel->optionAdd("$Xname*Scale*borderWidth", '1',20); -#$toplevel->optionAdd("$Xname*Scale*relief", 'groove',20); -$toplevel->optionAdd("$Xname*Scale*padY", 1,20); - -$toplevel->optionAdd("$Xname*Checkbutton*background", "#f0d0b0",20); -$toplevel->optionAdd("$Xname*Checkbutton*foreground", '#000000',20); -$toplevel->optionAdd("$Xname*Checkbutton*borderWidth", '2',20); -$toplevel->optionAdd("$Xname*Checkbutton*relief", 'groove',20); - -$toplevel->optionAdd("$Xname*activeBackground", "#ffffff",20); -$toplevel->optionAdd("$Xname*activeForeground", '#0000a0',20); -$toplevel->optionAdd("$Xname*borderWidth", 0,20); -$toplevel->optionAdd("$Xname*relief", 'flat',20); -$toplevel->optionAdd("$Xname*activeBorderWidth", 1,20); -$toplevel->optionAdd("$Xname*highlightThickness", 0,20); -$toplevel->optionAdd("$Xname*padX", 2,20); -$toplevel->optionAdd("$Xname*padY", 2,20); -$toplevel->optionAdd("$Xname*font", - '-*-helvetica-bold-r-*-*-12-*-*-*-*-*-*-*',20); -$toplevel->optionAdd("$Xname*Entry.font", - '-*-helvetica-medium-r-*-*-12-*-*-*-*-*-*-*',20); -$toplevel->optionAdd("$Xname*Exit.font", - '-*-helvetica-bold-r-*-*-10-*-*-*-*-*-*-*',20); -$toplevel->optionAdd("$Xname*Exit.relief", 'groove',20); -$toplevel->optionAdd("$Xname*Exit.padX", 1,20); -$toplevel->optionAdd("$Xname*Exit.padY", 1,20); -$toplevel->optionAdd("$Xname*Exit.borderWidth", 2,20); -$toplevel->optionAdd("$Xname*Exit*background", "#a0a0a0",20); -$toplevel->optionAdd("$Xname*Exit*disabledForeground", "#ffffff",20); - -#$toplevel->optionAdd("$Xname*Canvas.background", "#c0c0c0",20); - -$toplevel->optionAdd("$Xname*Entry.background", "#ffffff",20); -$toplevel->optionAdd("$Xname*Entry.disabledForeground", "#c0c0c0",20); -$toplevel->optionAdd("$Xname*Entry.relief", "sunken",20); -$toplevel->optionAdd("$Xname*Entry.borderWidth", 1,20); - -$toplevel->optionAdd("$Xname*Field.background", "#ffffff",20); -$toplevel->optionAdd("$Xname*Field.disabledForeground", "#c0c0c0",20); -$toplevel->optionAdd("$Xname*Field.relief", "flat",20); -$toplevel->optionAdd("$Xname*Field.borderWidth", 1,20); - -$toplevel->optionAdd("$Xname*Label.disabledForeground", "#c0c0c0",20); -$toplevel->optionAdd("$Xname*Label.borderWidth", 1,20); - -$toplevel->configure(-background=>$toplevel->optionGet("background","")); - -#$toplevel->resizable(FALSE,FALSE); - -my $panel=new MainWindow(-class=>'AnalyzerPanel'); -my $X2name=$panel->Class; - -$panel->optionAdd("$X2name.background", "#353535",20); -$panel->optionAdd("$X2name*highlightBackground", "#80c0d3",20); -$panel->optionAdd("$X2name.Panel.background", "#353535",20); -$panel->optionAdd("$X2name.Panel.foreground", "#4fc627",20); -$panel->optionAdd("$X2name.Panel.font", - '-*-helvetica-bold-o-*-*-18-*-*-*-*-*-*-*',20); -$panel->optionAdd("$X2name*Statuslabel.font", - '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20); -$panel->optionAdd("$X2name*Statuslabel.foreground", "#4fc627",20); -$panel->optionAdd("$X2name*Status.font", - '-*-helvetica-bold-r-*-*-18-*-*-*-*-*-*-*',20); - -$panel->optionAdd("$X2name*AlertDetail.font", - '-*-helvetica-medium-r-*-*-10-*-*-*-*-*-*-*',20); - - -$panel->optionAdd("$X2name*background", "#d0d0d0",20); -$panel->optionAdd("$X2name*foreground", '#000000',20); - -$panel->optionAdd("$X2name*Button*background", "#f0d0b0",20); -$panel->optionAdd("$X2name*Button*foreground", '#000000',20); -$panel->optionAdd("$X2name*Button*borderWidth", '2',20); -$panel->optionAdd("$X2name*Button*relief", 'groove',20); -$panel->optionAdd("$X2name*Button*padY", 1,20); - -$panel->optionAdd("$X2name*Checkbutton*background", "#f0d0b0",20); -$panel->optionAdd("$X2name*Checkbutton*foreground", '#000000',20); -$panel->optionAdd("$X2name*Checkbutton*borderWidth", '2',20); -#$panel->optionAdd("$X2name*Checkbutton*padX", '0',20); -#$panel->optionAdd("$X2name*Checkbutton*padY", '0',20); -#$panel->optionAdd("$X2name*Checkbutton*relief", 'groove',20); - -$panel->optionAdd("$X2name*activeBackground", "#ffffff",20); -$panel->optionAdd("$X2name*activeForeground", '#0000a0',20); -$panel->optionAdd("$X2name*borderWidth", 0,20); -$panel->optionAdd("$X2name*relief", 'flat',20); -$panel->optionAdd("$X2name*activeBorderWidth", 1,20); -$panel->optionAdd("$X2name*highlightThickness", 0,20); -$panel->optionAdd("$X2name*padX", 2,20); -$panel->optionAdd("$X2name*padY", 2,20); -$panel->optionAdd("$X2name*font", - '-*-helvetica-bold-r-*-*-12-*-*-*-*-*-*-*',20); -$panel->optionAdd("$X2name*Entry.font", - '-*-helvetica-medium-r-*-*-12-*-*-*-*-*-*-*',20); - -$panel->optionAdd("$X2name*Exit.font", - '-*-helvetica-bold-r-*-*-10-*-*-*-*-*-*-*',20); -$panel->optionAdd("$X2name*Exit.relief", 'groove',20); -$panel->optionAdd("$X2name*Exit.padX", 1,20); -$panel->optionAdd("$X2name*Exit.padY", 1,20); -$panel->optionAdd("$X2name*Exit.borderWidth", 2,20); -$panel->optionAdd("$X2name*Exit*background", "#a0a0a0",20); -$panel->optionAdd("$X2name*Exit*disabledForeground", "#ffffff",20); - -$panel->optionAdd("$X2name*Entry.background", "#ffffff",20); -$panel->optionAdd("$X2name*Entry.disabledForeground", "#c0c0c0",20); -$panel->optionAdd("$X2name*Entry.relief", "sunken",20); -$panel->optionAdd("$X2name*Entry.borderWidth", 1,20); - -$panel->optionAdd("$X2name*Field.background", "#ffffff",20); -$panel->optionAdd("$X2name*Field.disabledForeground", "#c0c0c0",20); -$panel->optionAdd("$X2name*Field.relief", "flat",20); -$panel->optionAdd("$X2name*Field.borderWidth", 1,20); - -$panel->optionAdd("$X2name*Label.disabledForeground", "#c0c0c0",20); -$panel->optionAdd("$X2name*Label.borderWidth", 1,20); - -$panel->configure(-background=>$panel->optionGet("background","")); - -#$panel->resizable("FALSE","FALSE"); - -my $panel_shell=$panel->Label(Name=>"shell",-borderwidth=>1,-relief=>'raised')-> - place(-x=>10,-y=>36,-relwidth=>1.0,-relheight=>1.0, - -width=>-20,-height=>-46,-anchor=>'nw'); - -my $panel_quit=$panel_shell->Button(-class=>"Exit",-text=>"quit",-command=>[sub{Shutdown()}])-> - place(-x=>-1,-y=>-1,-relx=>1.0,-rely=>1.0,-anchor=>'se'); - -$panel->Label(Name=>"logo text",-class=>"Panel",-text=>$version)-> - place(-x=>5,-y=>5,-anchor=>'nw'); - - -my $graph_shell=$toplevel->Label(Name=>"shell",-borderwidth=>1,-relief=>'raised')-> - place(-x=>10,-y=>36,-relwidth=>1.0,-relheight=>1.0, - -width=>-20,-height=>-46,-anchor=>'nw'); - -my $graph_status=$toplevel->Label(Name=>"logo text",-class=>"Panel",-text=>"Starting up")-> - place(-x=>5,-y=>5,-anchor=>'nw'); - - -my $panely=5; -my $panel_rescan=$panel_shell->Button(-text=>"rescan",-command=>[sub{scan_directory()}])-> - place(-x=>-5,-relx=>1.,-y=>$panely,-anchor=>'ne'); -$panely+=$panel_rescan->reqheight()+6; - - -my$temp=$graph_shell->Button(-text=>"<<", - -command=>[sub{$fileno-=10;$fileno=$first_file if($fileno<$first_file); - load_graph();}])-> - place(-x=>5,-y=>-5,-rely=>1.,-relwidth=>.2,-width=>-5,-anchor=>'sw'); -$graph_shell->Button(-text=>">>", - -command=>[sub{$fileno+=10;$fileno=$last_file if($fileno>$last_file); - load_graph();}])-> - place(-x=>-5,-y=>-5,-relwidth=>.2,-rely=>1.,-width=>-5,-relx=>1.,-anchor=>'se'); -$graph_shell->Button(-text=>"<", - -command=>[sub{$fileno-=1;$fileno=$first_file if($fileno<$first_file); - load_graph();}])-> - place(-x=>5,-y=>-5,-relwidth=>.3,-width=>-7,-rely=>1.,-relx=>.2,-anchor=>'sw'); -$graph_shell->Button(-text=>">", - -command=>[sub{$fileno+=1;$fileno=$last_file if($fileno>$last_file); - load_graph();}])-> - place(-x=>-5,-y=>-5,-relwidth=>.3,-width=>-7,-rely=>1.,-relx=>.8,-anchor=>'se'); -my$graphy=-10-$temp->reqheight(); -my$graph_slider=$temp=$graph_shell->Scale(-bigincrement=>1, - -resolution=>1, - -showvalue=>'TRUE',-variable=>\$fileno,-orient=>'horizontal')-> - place(-x=>5,-y=>$graphy,-relwidth=>1.,-rely=>1.,-width=>-10,-anchor=>'sw'); -$graphy-=$temp->reqheight()+5; - -my$onecrop; -my$twocrop; - -my$oneresize=$temp=$graph_shell->Checkbutton(-text=>"rescale",-variable=>\$onecrop, - -command=>[sub{draw_graph();}])-> - place(-x=>5,-y=>5,-anchor=>'nw'); - -my$one=$graph_shell->Canvas()-> - place(-relwidth=>1.,-width=>-10,-relheight=>.5,-height=>($graphy/2)-5-$temp->reqheight(), - -x=>5,-y=>5+$temp->reqheight,-anchor=>'nw'); - - -my$tworesize=$temp=$graph_shell->Checkbutton(-text=>"rescale",-variable=>\$twocrop, - -command=>[sub{draw_graph();}])-> - place(-rely=>1.,-y=>5,-anchor=>'nw',-in=>$one); -my$two=$graph_shell->Canvas()-> - place(-relwidth=>1.,-relheight=>1.,-rely=>1.,-y=>5+$temp->reqheight(),-anchor=>'nw',-in=>$one); - -scan_directory(); - -my%onestate; -my%twostate; -my @data; - -$onestate{"canvas"}=$one; -$onestate{"vars"}=\@panel_onevars; -$twostate{"canvas"}=$two; -$twostate{"vars"}=\@panel_twovars; - -$graph_slider->configure(-command=>[sub{load_graph()}]); -load_graph(); -$toplevel->bind('MainWindow','',[sub{$toplevel->update(); - draw_graph()}]); - -Tk::MainLoop(); - -sub load_graph{ - - scan_directory()if(!defined($panel_count)); - - @data=undef; - - for(my$i=0;$i<$panel_count;$i++){ - my$filename=$panel_keys[$i]."_$fileno.m"; - if(open F, "$filename"){ - $data[$i]=[()]; - close F; - } - } - draw_graph(); -} - -sub graphhelper{ - my($graph)=@_; - my$count=0; - my@colors=("#ff0000","#00df00","#0000ff","#ffff00","#ff00ff","#00ffff","#ffffff", - "#9f0000","#007f00","#00009f","#8f8f00","#8f008f","#008f8f","#000000"); - - my$w=$graph->{"canvas"}; - my$rescale=0; - - Status("Plotting $fileno"); - $w->delete('foo'); - $w->delete('legend'); - $w->delete('lines'); - - # count range - for(my$i=0;$i<$panel_count;$i++){ - if($graph->{"vars"}->[$i]){ - if(defined($data[$i])){ - if(!defined($graph->{"minx"})){ - $data[$i]->[0]=~m/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/; - $graph->{"maxx"}=$1; - $graph->{"minx"}=$1; - $graph->{"maxy"}=$2; - $graph->{"miny"}=$2; - $rescale=1; - } - - for(my$j=0;$j<=$#{$data[$i]};$j++){ - $data[$i]->[$j]=~m/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/; - $rescale=1 if($1>$graph->{"maxx"}); - $rescale=1 if($1<$graph->{"minx"}); - $rescale=1 if($2>$graph->{"maxy"}); - $rescale=1 if($2<$graph->{"miny"}); - $graph->{"maxx"}=$1 if($1>$graph->{"maxx"}); - $graph->{"minx"}=$1 if($1<$graph->{"minx"}); - $graph->{"maxy"}=$2 if($2>$graph->{"maxy"}); - $graph->{"miny"}=$2 if($2<$graph->{"miny"}); - } - } - $count++; - } - } - - my$width=$w->width(); - my$height=$w->height(); - - $rescale=1 if(!defined($graph->{"width"}) || - $width!=$graph->{"width"} || - $height!=$graph->{"height"}); - - $graph->{"width"}=$width; - $graph->{"height"}=$height; - - if(defined($graph->{"maxx"})){ - # draw axes, labels - # look for appropriate axis scales - - if($rescale){ - - $w->delete('ylabel'); - $w->delete('xlabel'); - $w->delete('axes'); - - my$yscale=1.; - my$xscale=1.; - my$iyscale=1.; - my$ixscale=1.; - while(($graph->{"maxx"}-$graph->{"minx"})*$xscale>15){$xscale*=.1;$ixscale*=10.;} - while(($graph->{"maxy"}-$graph->{"miny"})*$yscale>15){$yscale*=.1;$iyscale*=10.;} - - while(($graph->{"maxx"}-$graph->{"minx"})*$xscale<3){$xscale*=10.;$ixscale*=.1;} - while(($graph->{"maxy"}-$graph->{"miny"})*$yscale<3){$yscale*=10.;$iyscale*=.1;} - - # how tall are the x axis labels? - $w->createText(-1,-1,-anchor=>'se',-tags=>['foo'],-text=>"0123456789."); - my($x1,$y1,$x2,$y2)=$w->bbox('foo'); - $w->delete('foo'); - my$maxlabelheight=$y2-$y1; - my$useabley=$height-$maxlabelheight-3; - my$pixelpery=$useabley/($graph->{"maxy"}-$graph->{"miny"}); - - # place y axis labels at proper spacing/height - my$lasty=-$maxlabelheight/2; - my$topyval=int($graph->{"maxy"}*$yscale+1.)*$iyscale; - - for(my$i=0;;$i++){ - my$yval= $topyval-$i*$iyscale; - my$y= ($graph->{"maxy"}-$yval)*$pixelpery; - last if($y>$useabley); - if($y-$maxlabelheight>=$lasty){ - $w->createText(0,$y,-anchor=>'e',-tags=>['ylabel'],-text=>"$yval"); - $lasty=$y; - } - } - - # get the max ylabel width and place them at proper x - ($x1,$y1,$x2,$y2)=$w->bbox('ylabel'); - my$maxylabelwidth=$x2-$x1; - $w->move('ylabel',$maxylabelwidth,0); - - my$beginx=$maxylabelwidth+3; - my$useablex=$width-$beginx; - - # draw basic axes - $w->createLine($beginx,0,$beginx,$useabley,$width,$useabley, - -tags=>['axes'],-width=>2); - # draw y tix - $lasty=-$maxlabelheight/2; - for(my$i=0;;$i++){ - my$yval= $topyval-$i*$iyscale; - my$y= ($graph->{"maxy"}-$yval)*$pixelpery; - last if($y>$useabley); - if($yval==0){ - $w->createLine($beginx,$y,$width,$y, - -tags=>['axes'],-width=>1); - }else{ - if($y-$maxlabelheight>=$lasty){ - $w->createLine($beginx,$y,$width,$y, - -tags=>['axes'],-width=>1, - -stipple=>'gray50'); - - $lasty=$y; - } - } - } - - # place x axis labels at proper spacing - my$topxval=int($graph->{"maxx"}*$xscale+1.)*$ixscale; - my$pixelperx=$useablex/($graph->{"maxx"}-$graph->{"minx"}); - - for(my$i=0;;$i++){ - my$xval= $topxval-$i*$ixscale; - my$x= $width-($graph->{"maxx"}-$xval)*$pixelperx; - - last if($x<$beginx); - # bounding boxen are hard. place temp labels. - $w->createText(-1,-1,-anchor=>'e',-tags=>['foo'],-text=>"$xval"); - } - - ($x1,$y1,$x2,$y2)=$w->bbox('foo'); - my$maxxlabelwidth=$x2-$x1; - $w->delete('foo'); - my$lastx=$width; - - for(my$i=0;;$i++){ - my$xval= $topxval-$i*$ixscale; - my$x= $width-($graph->{"maxx"}-$xval)*$pixelperx; - - last if($x-$maxxlabelwidth/2<0 || $x<$beginx); - if($xval==0 && $x<$width){ - $w->createLine($x,0,$x,$useabley,-tags=>['axes'],-width=>1); - } - - if($x+$maxxlabelwidth<=$lastx){ - $w->createText($x,$height-1,-anchor=>'s',-tags=>['xlabel'],-text=>"$xval"); - $w->createLine($x,0,$x,$useabley,-tags=>['axes'],-width=>1,-stipple=>"gray50"); - $lastx=$x; - } - } - $graph->{"labelheight"}=$maxlabelheight; - $graph->{"xo"}=$beginx; - $graph->{"ppx"}=$pixelperx; - $graph->{"ppy"}=$pixelpery; - } - - # plot the files - $count=0; - my$legendy=$graph->{"labelheight"}/2; - for(my$i=0;$i<$panel_count;$i++){ - if($graph->{"vars"}->[$i]){ - $count++; # count here for legend color selection stability - if(defined($data[$i])){ - # place a legend placard; - my$color=$colors[($count-1)%($#colors+1)]; - $w->createText($width,$legendy,-anchor=>'e',-tags=>['legend'], - -fill=>$color,-text=>$panel_keys[$i]); - $legendy+=$graph->{"labelheight"}; - - # plot the lines - my@pairs=map{if(/^\s*(-?[0-9\.]*)[ ,]+(-?[0-9\.]*)/){ - (($1-$graph->{"minx"})*$graph->{"ppx"}+$graph->{"xo"}, - (-$2+$graph->{"maxy"})*$graph->{"ppy"})}} (@{$data[$i]}); - - $w->createLine((@pairs),-fill=>$color,-tags=>['lines']); - } - } - } - } -} - -sub draw_graph{ - - if($onecrop){ - $onestate{"minx"}=undef; - $onestate{"miny"}=undef; - $onestate{"maxx"}=undef; - $onestate{"maxy"}=undef; - } - if($twocrop){ - $twostate{"minx"}=undef; - $twostate{"miny"}=undef; - $twostate{"maxx"}=undef; - $twostate{"maxy"}=undef; - } - - for(my$i=0;$i<$panel_count;$i++){ - if($twostate{"vars"}->[$i]){ - - #re-place the canvases - - $oneresize->place(-x=>5,-y=>5,-anchor=>'nw'); - - $one->place(-relwidth=>1.,-width=>-10,-relheight=>.5, - -height=>($graphy/2)-5-$oneresize->reqheight(), - -x=>5,-y=>5+$oneresize->reqheight,-anchor=>'nw'); - - $tworesize->place(-rely=>1.,-y=>5,-anchor=>'nw',-in=>$one); - $two->place(-relwidth=>1.,-relheight=>1.,-rely=>1., - -y=>5+$tworesize->reqheight(),-anchor=>'nw',-in=>$one); - - graphhelper(\%onestate); - graphhelper(\%twostate); - return; - } - } - - $oneresize->place(-x=>5,-y=>5,-anchor=>'nw'); - - $one->place(-relwidth=>1.,-width=>-10,-relheight=>1., - -height=>$graphy-5-$oneresize->reqheight(), - -x=>5,-y=>5+$oneresize->reqheight,-anchor=>'nw'); - - $tworesize->placeForget(); - $two->placeForget(); - - graphhelper(\%onestate); -} - -sub depopulate_panel{ - my $win; - foreach $win (@panel_labels){ - $win->destroy(); - } - @panel_labels=(); - foreach $win (@panel_ones){ - $win->destroy(); - } - @panel_ones=(); - foreach $win (@panel_twos){ - $win->destroy(); - } - @panel_twos=(); - @panel_keys=(); -} - -sub populate_panel{ - my $localy=$panely; - my $key; - my $i=0; - foreach $key (sort (keys %bases)){ - $panel_keys[$i]=$key; - if(!defined($panel_onevars[$i])){ - $panel_onevars[$i]=0; - $panel_twovars[$i]=0; - } - - my $temp=$panel_twos[$i]=$panel_shell-> - Checkbutton(-variable=>\$panel_twovars[$i],-command=>['main::draw_graph'],-text=>'2')-> - place(-y=>$localy,-x=>-5,-anchor=>"ne",-relx=>1.); - my $oney=$temp->reqheight(); - my $onex=$temp->reqwidth()+15; - - $temp=$panel_ones[$i]=$panel_shell-> - Checkbutton(-variable=>\$panel_onevars[$i],-command=>['main::draw_graph'],-text=>'1')-> - place(-y=>0,-x=>0,-anchor=>"ne",-in=>$temp,-bordermode=>'outside'); - $oney=$temp->reqheight() if ($oney<$temp->reqheight()); - $onex+=$temp->reqwidth(); - - $temp=$panel_labels[$i]=$panel_shell->Label(-text=>$key,-class=>'Field',-justify=>'left')-> - place(-y=>$localy,-x=>5,-anchor=>"nw",-relwidth=>1.,-width=>-$onex, - -bordermode=>'outside'); - $oney=$temp->reqheight() if ($oney<$temp->reqheight()); - - $localy+=$oney+2; - $i++; - } - $panel_count=$i; - - $localy+=$panel_quit->reqheight()+50; - my $geometry=$panel->geometry(); - $geometry=~/^(\d+)/; - - $panel->configure(-height=>$localy); - $panel->configure(-width=>$1); -} - -sub Shutdown{ - Tk::exit(); -} - -sub Status{ - my$text=shift @_; - $graph_status->configure(-text=>"$text"); - $toplevel->update(); -} - -sub scan_directory{ - - %bases=(); - my$count=0; - - $first_file=undef; - $last_file=undef; - - if(opendir(D,".")){ - my$file; - while(defined($file=readdir(D))){ - if($file=~m/^(\S*)_(\d+).m/){ - $bases{"$1"}="0"; - $first_file=$2 if(!defined($first_file) || $2<$first_file); - $last_file=$2 if(!defined($last_file) || $2>$last_file); - $count++; - - Status("Reading... $count")if($count%117==0); - } - } - closedir(D); - } - Status("Done Reading: $count files"); - depopulate_panel(); - populate_panel(); - - $fileno=$first_file if($fileno<$first_file); - $fileno=$last_file if($fileno>$last_file); - - $graph_slider->configure(-from=>$first_file,-to=>$last_file); - -} - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/examples/seeking_example.c b/ExternalLibs/libvorbis-1.3.1/examples/seeking_example.c deleted file mode 100644 index 361bfb1..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/seeking_example.c +++ /dev/null @@ -1,259 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: illustrate seeking, and test it too - last mod: $Id: seeking_example.c 16329 2009-07-24 01:53:20Z xiphmont $ - - ********************************************************************/ - -#include -#include -#include "vorbis/codec.h" -#include "vorbis/vorbisfile.h" - -#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ -# include -# include -#endif - -void _verify(OggVorbis_File *ov, - ogg_int64_t val,ogg_int64_t pcmval,double timeval, - ogg_int64_t pcmlength, - char *bigassbuffer){ - int j; - long bread; - char buffer[4096]; - int dummy; - ogg_int64_t pos; - - /* verify the raw position, the pcm position and position decode */ - if(val!=-1 && ov_raw_tell(ov)pcmval){ - fprintf(stderr,"pcm position out of tolerance: requested %ld, got %ld\n", - (long)pcmval,(long)ov_pcm_tell(ov)); - exit(1); - } - if(timeval!=-1 && ov_time_tell(ov)>timeval){ - fprintf(stderr,"time position out of tolerance: requested %f, got %f\n", - timeval,ov_time_tell(ov)); - exit(1); - } - pos=ov_pcm_tell(ov); - if(pos<0 || pos>pcmlength){ - fprintf(stderr,"pcm position out of bounds: got %ld\n",(long)pos); - exit(1); - } - bread=ov_read(ov,buffer,4096,1,1,1,&dummy); - for(j=0;jchannels!=2){ - fprintf(stderr,"Sorry; right now seeking_test can only use Vorbis files\n" - "that are entirely stereo.\n\n"); - exit(1); - } - } - - /* because we want to do sample-level verification that the seek - does what it claimed, decode the entire file into memory */ - pcmlength=ov_pcm_total(&ov,-1); - timelength=ov_time_total(&ov,-1); - bigassbuffer=malloc(pcmlength*2); /* w00t */ - i=0; - while(ival+1){ - fprintf(stderr,"Declared position didn't perfectly match request: %f != %f\n", - val,ov_time_tell(&ov)); - exit(1); - } - - _verify(&ov,-1,-1,val,pcmlength,bigassbuffer); - - } - } - - fprintf(stderr,"\r \nOK.\n\n"); - - - }else{ - fprintf(stderr,"Standard input was not seekable.\n"); - } - - ov_clear(&ov); - return 0; -} - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/examples/vorbisfile_example.c b/ExternalLibs/libvorbis-1.3.1/examples/vorbisfile_example.c deleted file mode 100644 index a32f248..0000000 --- a/ExternalLibs/libvorbis-1.3.1/examples/vorbisfile_example.c +++ /dev/null @@ -1,92 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: simple example decoder using vorbisfile - last mod: $Id: vorbisfile_example.c 16328 2009-07-24 01:51:10Z xiphmont $ - - ********************************************************************/ - -/* Takes a vorbis bitstream from stdin and writes raw stereo PCM to - stdout using vorbisfile. Using vorbisfile is much simpler than - dealing with libvorbis. */ - -#include -#include -#include -#include -#include - -#ifdef _WIN32 /* We need the following two to set stdin/stdout to binary */ -#include -#include -#endif - -char pcmout[4096]; /* take 4k out of the data segment, not the stack */ - -int main(){ - OggVorbis_File vf; - int eof=0; - int current_section; - -#ifdef _WIN32 /* We need to set stdin/stdout to binary mode. Damn windows. */ - /* Beware the evil ifdef. We avoid these where we can, but this one we - cannot. Don't add any more, you'll probably go to hell if you do. */ - _setmode( _fileno( stdin ), _O_BINARY ); - _setmode( _fileno( stdout ), _O_BINARY ); -#endif - - if(ov_open_callbacks(stdin, &vf, NULL, 0, OV_CALLBACKS_NOCLOSE) < 0) { - fprintf(stderr,"Input does not appear to be an Ogg bitstream.\n"); - exit(1); - } - - /* Throw the comments plus a few lines about the bitstream we're - decoding */ - { - char **ptr=ov_comment(&vf,-1)->user_comments; - vorbis_info *vi=ov_info(&vf,-1); - while(*ptr){ - fprintf(stderr,"%s\n",*ptr); - ++ptr; - } - fprintf(stderr,"\nBitstream is %d channel, %ldHz\n",vi->channels,vi->rate); - fprintf(stderr,"\nDecoded length: %ld samples\n", - (long)ov_pcm_total(&vf,-1)); - fprintf(stderr,"Encoded by: %s\n\n",ov_comment(&vf,-1)->vendor); - } - - while(!eof){ - long ret=ov_read(&vf,pcmout,sizeof(pcmout),0,2,1,¤t_section); - if (ret == 0) { - /* EOF */ - eof=1; - } else if (ret < 0) { - if(ret==OV_EBADLINK){ - fprintf(stderr,"Corrupt bitstream section! Exiting.\n"); - exit(1); - } - - /* some other error in the stream. Not a problem, just reporting it in - case we (the app) cares. In this case, we don't. */ - } else { - /* we don't bother dealing with sample rate changes, etc, but - you'll have to*/ - fwrite(pcmout,1,ret,stdout); - } - } - - /* cleanup */ - ov_clear(&vf); - - fprintf(stderr,"Done.\n"); - return(0); -} diff --git a/ExternalLibs/libvorbis-1.3.1/install-sh b/ExternalLibs/libvorbis-1.3.1/install-sh deleted file mode 100644 index 4d4a951..0000000 --- a/ExternalLibs/libvorbis-1.3.1/install-sh +++ /dev/null @@ -1,323 +0,0 @@ -#!/bin/sh -# install - install a program, script, or datafile - -scriptversion=2005-05-14.22 - -# This originates from X11R5 (mit/util/scripts/install.sh), which was -# later released in X11R6 (xc/config/util/install.sh) with the -# following copyright and license. -# -# Copyright (C) 1994 X Consortium -# -# Permission is hereby granted, free of charge, to any person obtaining a copy -# of this software and associated documentation files (the "Software"), to -# deal in the Software without restriction, including without limitation the -# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or -# sell copies of the Software, and to permit persons to whom the Software is -# furnished to do so, subject to the following conditions: -# -# The above copyright notice and this permission notice shall be included in -# all copies or substantial portions of the Software. -# -# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN -# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- -# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -# -# Except as contained in this notice, the name of the X Consortium shall not -# be used in advertising or otherwise to promote the sale, use or other deal- -# ings in this Software without prior written authorization from the X Consor- -# tium. -# -# -# FSF changes to this file are in the public domain. -# -# Calling this script install-sh is preferred over install.sh, to prevent -# `make' implicit rules from creating a file called install from it -# when there is no Makefile. -# -# This script is compatible with the BSD install script, but was written -# from scratch. It can only install one file at a time, a restriction -# shared with many OS's install programs. - -# set DOITPROG to echo to test this script - -# Don't use :- since 4.3BSD and earlier shells don't like it. -doit="${DOITPROG-}" - -# put in absolute paths if you don't have them in your path; or use env. vars. - -mvprog="${MVPROG-mv}" -cpprog="${CPPROG-cp}" -chmodprog="${CHMODPROG-chmod}" -chownprog="${CHOWNPROG-chown}" -chgrpprog="${CHGRPPROG-chgrp}" -stripprog="${STRIPPROG-strip}" -rmprog="${RMPROG-rm}" -mkdirprog="${MKDIRPROG-mkdir}" - -chmodcmd="$chmodprog 0755" -chowncmd= -chgrpcmd= -stripcmd= -rmcmd="$rmprog -f" -mvcmd="$mvprog" -src= -dst= -dir_arg= -dstarg= -no_target_directory= - -usage="Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE - or: $0 [OPTION]... SRCFILES... DIRECTORY - or: $0 [OPTION]... -t DIRECTORY SRCFILES... - or: $0 [OPTION]... -d DIRECTORIES... - -In the 1st form, copy SRCFILE to DSTFILE. -In the 2nd and 3rd, copy all SRCFILES to DIRECTORY. -In the 4th, create DIRECTORIES. - -Options: --c (ignored) --d create directories instead of installing files. --g GROUP $chgrpprog installed files to GROUP. --m MODE $chmodprog installed files to MODE. --o USER $chownprog installed files to USER. --s $stripprog installed files. --t DIRECTORY install into DIRECTORY. --T report an error if DSTFILE is a directory. ---help display this help and exit. ---version display version info and exit. - -Environment variables override the default commands: - CHGRPPROG CHMODPROG CHOWNPROG CPPROG MKDIRPROG MVPROG RMPROG STRIPPROG -" - -while test -n "$1"; do - case $1 in - -c) shift - continue;; - - -d) dir_arg=true - shift - continue;; - - -g) chgrpcmd="$chgrpprog $2" - shift - shift - continue;; - - --help) echo "$usage"; exit $?;; - - -m) chmodcmd="$chmodprog $2" - shift - shift - continue;; - - -o) chowncmd="$chownprog $2" - shift - shift - continue;; - - -s) stripcmd=$stripprog - shift - continue;; - - -t) dstarg=$2 - shift - shift - continue;; - - -T) no_target_directory=true - shift - continue;; - - --version) echo "$0 $scriptversion"; exit $?;; - - *) # When -d is used, all remaining arguments are directories to create. - # When -t is used, the destination is already specified. - test -n "$dir_arg$dstarg" && break - # Otherwise, the last argument is the destination. 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then - case "$current_libdirs " in - *" $libdir "*) ;; - *) current_libdirs="$current_libdirs $libdir" ;; - esac - else - # Note the libdir as a future libdir. - case "$future_libdirs " in - *" $libdir "*) ;; - *) future_libdirs="$future_libdirs $libdir" ;; - esac - fi - - func_dirname "$file" "/" "" - dir="$func_dirname_result" - dir="$dir$objdir" - - if test -n "$relink_command"; then - # Determine the prefix the user has applied to our future dir. - inst_prefix_dir=`$ECHO "X$destdir" | $Xsed -e "s%$libdir\$%%"` - - # Don't allow the user to place us outside of our expected - # location b/c this prevents finding dependent libraries that - # are installed to the same prefix. - # At present, this check doesn't affect windows .dll's that - # are installed into $libdir/../bin (currently, that works fine) - # but it's something to keep an eye on. - test "$inst_prefix_dir" = "$destdir" && \ - func_fatal_error "error: cannot install \`$file' to a directory not ending in $libdir" - - if test -n "$inst_prefix_dir"; then - # Stick the inst_prefix_dir data into the link command. - relink_command=`$ECHO "X$relink_command" | $Xsed -e "s%@inst_prefix_dir@%-inst-prefix-dir $inst_prefix_dir%"` - else - relink_command=`$ECHO "X$relink_command" | $Xsed -e "s%@inst_prefix_dir@%%"` - fi - - func_warning "relinking \`$file'" - func_show_eval "$relink_command" \ - 'func_fatal_error "error: relink \`$file'\'' with the above command before installing it"' - fi - - # See the names of the shared library. - set dummy $library_names; shift - if test -n "$1"; then - realname="$1" - shift - - srcname="$realname" - test -n "$relink_command" && srcname="$realname"T - - # Install the shared library and build the symlinks. - func_show_eval "$install_prog $dir/$srcname $destdir/$realname" \ - 'exit $?' - tstripme="$stripme" - case $host_os in - cygwin* | mingw* | pw32* | cegcc*) - case $realname in - *.dll.a) - tstripme="" - ;; - esac - ;; - esac - if test -n "$tstripme" && test -n "$striplib"; then - func_show_eval "$striplib $destdir/$realname" 'exit $?' - fi - - if test "$#" -gt 0; then - # Delete the old symlinks, and create new ones. - # Try `ln -sf' first, because the `ln' binary might depend on - # the symlink we replace! Solaris /bin/ln does not understand -f, - # so we also need to try rm && ln -s. - for linkname - do - test "$linkname" != "$realname" \ - && func_show_eval "(cd $destdir && { $LN_S -f $realname $linkname || { $RM $linkname && $LN_S $realname $linkname; }; })" - done - fi - - # Do each command in the postinstall commands. - lib="$destdir/$realname" - func_execute_cmds "$postinstall_cmds" 'exit $?' - fi - - # Install the pseudo-library for information purposes. - func_basename "$file" - name="$func_basename_result" - instname="$dir/$name"i - func_show_eval "$install_prog $instname $destdir/$name" 'exit $?' - - # Maybe install the static library, too. - test -n "$old_library" && staticlibs="$staticlibs $dir/$old_library" - ;; - - *.lo) - # Install (i.e. copy) a libtool object. - - # Figure out destination file name, if it wasn't already specified. - if test -n "$destname"; then - destfile="$destdir/$destname" - else - func_basename "$file" - destfile="$func_basename_result" - destfile="$destdir/$destfile" - fi - - # Deduce the name of the destination old-style object file. - case $destfile in - *.lo) - func_lo2o "$destfile" - staticdest=$func_lo2o_result - ;; - *.$objext) - staticdest="$destfile" - destfile= - ;; - *) - func_fatal_help "cannot copy a libtool object to \`$destfile'" - ;; - esac - - # Install the libtool object if requested. - test -n "$destfile" && \ - func_show_eval "$install_prog $file $destfile" 'exit $?' - - # Install the old object if enabled. - if test "$build_old_libs" = yes; then - # Deduce the name of the old-style object file. - func_lo2o "$file" - staticobj=$func_lo2o_result - func_show_eval "$install_prog \$staticobj \$staticdest" 'exit $?' - fi - exit $EXIT_SUCCESS - ;; - - *) - # Figure out destination file name, if it wasn't already specified. - if test -n "$destname"; then - destfile="$destdir/$destname" - else - func_basename "$file" - destfile="$func_basename_result" - destfile="$destdir/$destfile" - fi - - # If the file is missing, and there is a .exe on the end, strip it - # because it is most likely a libtool script we actually want to - # install - stripped_ext="" - case $file in - *.exe) - if test ! -f "$file"; then - func_stripname '' '.exe' "$file" - file=$func_stripname_result - stripped_ext=".exe" - fi - ;; - esac - - # Do a test to see if this is really a libtool program. - case $host in - *cygwin* | *mingw*) - if func_ltwrapper_executable_p "$file"; then - func_ltwrapper_scriptname "$file" - wrapper=$func_ltwrapper_scriptname_result - else - func_stripname '' '.exe' "$file" - wrapper=$func_stripname_result - fi - ;; - *) - wrapper=$file - ;; - esac - if func_ltwrapper_script_p "$wrapper"; then - notinst_deplibs= - relink_command= - - func_source "$wrapper" - - # Check the variables that should have been set. - test -z "$generated_by_libtool_version" && \ - func_fatal_error "invalid libtool wrapper script \`$wrapper'" - - finalize=yes - for lib in $notinst_deplibs; do - # Check to see that each library is installed. - libdir= - if test -f "$lib"; then - func_source "$lib" - fi - libfile="$libdir/"`$ECHO "X$lib" | $Xsed -e 's%^.*/%%g'` ### testsuite: skip nested quoting test - if test -n "$libdir" && test ! -f "$libfile"; then - func_warning "\`$lib' has not been installed in \`$libdir'" - finalize=no - fi - done - - relink_command= - func_source "$wrapper" - - outputname= - if test "$fast_install" = no && test -n "$relink_command"; then - $opt_dry_run || { - if test "$finalize" = yes; then - tmpdir=`func_mktempdir` - func_basename "$file$stripped_ext" - file="$func_basename_result" - outputname="$tmpdir/$file" - # Replace the output file specification. - relink_command=`$ECHO "X$relink_command" | $Xsed -e 's%@OUTPUT@%'"$outputname"'%g'` - - $opt_silent || { - func_quote_for_expand "$relink_command" - eval "func_echo $func_quote_for_expand_result" - } - if eval "$relink_command"; then : - else - func_error "error: relink \`$file' with the above command before installing it" - $opt_dry_run || ${RM}r "$tmpdir" - continue - fi - file="$outputname" - else - func_warning "cannot relink \`$file'" - fi - } - else - # Install the binary that we compiled earlier. - file=`$ECHO "X$file$stripped_ext" | $Xsed -e "s%\([^/]*\)$%$objdir/\1%"` - fi - fi - - # remove .exe since cygwin /usr/bin/install will append another - # one anyway - case $install_prog,$host in - */usr/bin/install*,*cygwin*) - case $file:$destfile in - *.exe:*.exe) - # this is ok - ;; - *.exe:*) - destfile=$destfile.exe - ;; - *:*.exe) - func_stripname '' '.exe' "$destfile" - destfile=$func_stripname_result - ;; - esac - ;; - esac - func_show_eval "$install_prog\$stripme \$file \$destfile" 'exit $?' - $opt_dry_run || if test -n "$outputname"; then - ${RM}r "$tmpdir" - fi - ;; - esac - done - - for file in $staticlibs; do - func_basename "$file" - name="$func_basename_result" - - # Set up the ranlib parameters. - oldlib="$destdir/$name" - - func_show_eval "$install_prog \$file \$oldlib" 'exit $?' - - if test -n "$stripme" && test -n "$old_striplib"; then - func_show_eval "$old_striplib $oldlib" 'exit $?' - fi - - # Do each command in the postinstall commands. - func_execute_cmds "$old_postinstall_cmds" 'exit $?' - done - - test -n "$future_libdirs" && \ - func_warning "remember to run \`$progname --finish$future_libdirs'" - - if test -n "$current_libdirs"; then - # Maybe just do a dry run. - $opt_dry_run && current_libdirs=" -n$current_libdirs" - exec_cmd='$SHELL $progpath $preserve_args --finish$current_libdirs' - else - exit $EXIT_SUCCESS - fi -} - -test "$mode" = install && func_mode_install ${1+"$@"} - - -# func_generate_dlsyms outputname originator pic_p -# Extract symbols from dlprefiles and create ${outputname}S.o with -# a dlpreopen symbol table. -func_generate_dlsyms () -{ - $opt_debug - my_outputname="$1" - my_originator="$2" - my_pic_p="${3-no}" - my_prefix=`$ECHO "$my_originator" | sed 's%[^a-zA-Z0-9]%_%g'` - my_dlsyms= - - if test -n "$dlfiles$dlprefiles" || test "$dlself" != no; then - if test -n "$NM" && test -n "$global_symbol_pipe"; then - my_dlsyms="${my_outputname}S.c" - else - func_error "not configured to extract global symbols from dlpreopened files" - fi - fi - - if test -n "$my_dlsyms"; then - case $my_dlsyms in - "") ;; - *.c) - # Discover the nlist of each of the dlfiles. - nlist="$output_objdir/${my_outputname}.nm" - - func_show_eval "$RM $nlist ${nlist}S ${nlist}T" - - # Parse the name list into a source file. - func_verbose "creating $output_objdir/$my_dlsyms" - - $opt_dry_run || $ECHO > "$output_objdir/$my_dlsyms" "\ -/* $my_dlsyms - symbol resolution table for \`$my_outputname' dlsym emulation. */ -/* Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION */ - -#ifdef __cplusplus -extern \"C\" { -#endif - -/* External symbol declarations for the compiler. */\ -" - - if test "$dlself" = yes; then - func_verbose "generating symbol list for \`$output'" - - $opt_dry_run || echo ': @PROGRAM@ ' > "$nlist" - - # Add our own program objects to the symbol list. - progfiles=`$ECHO "X$objs$old_deplibs" | $SP2NL | $Xsed -e "$lo2o" | $NL2SP` - for progfile in $progfiles; do - func_verbose "extracting global C symbols from \`$progfile'" - $opt_dry_run || eval "$NM $progfile | $global_symbol_pipe >> '$nlist'" - done - - if test -n "$exclude_expsyms"; then - $opt_dry_run || { - eval '$EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - if test -n "$export_symbols_regex"; then - $opt_dry_run || { - eval '$EGREP -e "$export_symbols_regex" "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - } - fi - - # Prepare the list of exported symbols - if test -z "$export_symbols"; then - export_symbols="$output_objdir/$outputname.exp" - $opt_dry_run || { - $RM $export_symbols - eval "${SED} -n -e '/^: @PROGRAM@ $/d' -e 's/^.* \(.*\)$/\1/p' "'< "$nlist" > "$export_symbols"' - case $host in - *cygwin* | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$export_symbols" >> "$output_objdir/$outputname.def"' - ;; - esac - } - else - $opt_dry_run || { - eval "${SED} -e 's/\([].[*^$]\)/\\\\\1/g' -e 's/^/ /' -e 's/$/$/'"' < "$export_symbols" > "$output_objdir/$outputname.exp"' - eval '$GREP -f "$output_objdir/$outputname.exp" < "$nlist" > "$nlist"T' - eval '$MV "$nlist"T "$nlist"' - case $host in - *cygwin | *mingw* | *cegcc* ) - eval "echo EXPORTS "'> "$output_objdir/$outputname.def"' - eval 'cat "$nlist" >> "$output_objdir/$outputname.def"' - ;; - esac - } - fi - fi - - for dlprefile in $dlprefiles; do - func_verbose "extracting global C symbols from \`$dlprefile'" - func_basename "$dlprefile" - name="$func_basename_result" - $opt_dry_run || { - eval '$ECHO ": $name " >> "$nlist"' - eval "$NM $dlprefile 2>/dev/null | $global_symbol_pipe >> '$nlist'" - } - done - - $opt_dry_run || { - # Make sure we have at least an empty file. - test -f "$nlist" || : > "$nlist" - - if test -n "$exclude_expsyms"; then - $EGREP -v " ($exclude_expsyms)$" "$nlist" > "$nlist"T - $MV "$nlist"T "$nlist" - fi - - # Try sorting and uniquifying the output. - if $GREP -v "^: " < "$nlist" | - if sort -k 3 /dev/null 2>&1; then - sort -k 3 - else - sort +2 - fi | - uniq > "$nlist"S; then - : - else - $GREP -v "^: " < "$nlist" > "$nlist"S - fi - - if test -f "$nlist"S; then - eval "$global_symbol_to_cdecl"' < "$nlist"S >> "$output_objdir/$my_dlsyms"' - else - $ECHO '/* NONE */' >> "$output_objdir/$my_dlsyms" - fi - - $ECHO >> "$output_objdir/$my_dlsyms" "\ - -/* The mapping between symbol names and symbols. */ -typedef struct { - const char *name; - void *address; -} lt_dlsymlist; -" - case $host in - *cygwin* | *mingw* | *cegcc* ) - $ECHO >> "$output_objdir/$my_dlsyms" "\ -/* DATA imports from DLLs on WIN32 con't be const, because - runtime relocations are performed -- see ld's documentation - on pseudo-relocs. */" - lt_dlsym_const= ;; - *osf5*) - echo >> "$output_objdir/$my_dlsyms" "\ -/* This system does not cope well with relocations in const data */" - lt_dlsym_const= ;; - *) - lt_dlsym_const=const ;; - esac - - $ECHO >> "$output_objdir/$my_dlsyms" "\ -extern $lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[]; -$lt_dlsym_const lt_dlsymlist -lt_${my_prefix}_LTX_preloaded_symbols[] = -{\ - { \"$my_originator\", (void *) 0 }," - - case $need_lib_prefix in - no) - eval "$global_symbol_to_c_name_address" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - *) - eval "$global_symbol_to_c_name_address_lib_prefix" < "$nlist" >> "$output_objdir/$my_dlsyms" - ;; - esac - $ECHO >> "$output_objdir/$my_dlsyms" "\ - {0, (void *) 0} -}; - -/* This works around a problem in FreeBSD linker */ -#ifdef FREEBSD_WORKAROUND -static const void *lt_preloaded_setup() { - return lt_${my_prefix}_LTX_preloaded_symbols; -} -#endif - -#ifdef __cplusplus -} -#endif\ -" - } # !$opt_dry_run - - pic_flag_for_symtable= - case "$compile_command " in - *" -static "*) ;; - *) - case $host in - # compiling the symbol table file with pic_flag works around - # a FreeBSD bug that causes programs to crash when -lm is - # linked before any other PIC object. But we must not use - # pic_flag when linking with -static. The problem exists in - # FreeBSD 2.2.6 and is fixed in FreeBSD 3.1. - *-*-freebsd2*|*-*-freebsd3.0*|*-*-freebsdelf3.0*) - pic_flag_for_symtable=" $pic_flag -DFREEBSD_WORKAROUND" ;; - *-*-hpux*) - pic_flag_for_symtable=" $pic_flag" ;; - *) - if test "X$my_pic_p" != Xno; then - pic_flag_for_symtable=" $pic_flag" - fi - ;; - esac - ;; - esac - symtab_cflags= - for arg in $LTCFLAGS; do - case $arg in - -pie | -fpie | -fPIE) ;; - *) symtab_cflags="$symtab_cflags $arg" ;; - esac - done - - # Now compile the dynamic symbol file. - func_show_eval '(cd $output_objdir && $LTCC$symtab_cflags -c$no_builtin_flag$pic_flag_for_symtable "$my_dlsyms")' 'exit $?' - - # Clean up the generated files. - func_show_eval '$RM "$output_objdir/$my_dlsyms" "$nlist" "${nlist}S" "${nlist}T"' - - # Transform the symbol file into the correct name. - symfileobj="$output_objdir/${my_outputname}S.$objext" - case $host in - *cygwin* | *mingw* | *cegcc* ) - if test -f "$output_objdir/$my_outputname.def"; then - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$output_objdir/$my_outputname.def $symfileobj%"` - else - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - fi - ;; - *) - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$symfileobj%"` - ;; - esac - ;; - *) - func_fatal_error "unknown suffix for \`$my_dlsyms'" - ;; - esac - else - # We keep going just in case the user didn't refer to - # lt_preloaded_symbols. The linker will fail if global_symbol_pipe - # really was required. - - # Nullify the symbol file. - compile_command=`$ECHO "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"` - finalize_command=`$ECHO "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"` - fi -} - -# func_win32_libid arg -# return the library type of file 'arg' -# -# Need a lot of goo to handle *both* DLLs and import libs -# Has to be a shell function in order to 'eat' the argument -# that is supplied when $file_magic_command is called. -func_win32_libid () -{ - $opt_debug - win32_libid_type="unknown" - win32_fileres=`file -L $1 2>/dev/null` - case $win32_fileres in - *ar\ archive\ import\ library*) # definitely import - win32_libid_type="x86 archive import" - ;; - *ar\ archive*) # could be an import, or static - if eval $OBJDUMP -f $1 | $SED -e '10q' 2>/dev/null | - $EGREP 'file format pe-i386(.*architecture: i386)?' >/dev/null ; then - win32_nmres=`eval $NM -f posix -A $1 | - $SED -n -e ' - 1,100{ - / I /{ - s,.*,import, - p - q - } - }'` - case $win32_nmres in - import*) win32_libid_type="x86 archive import";; - *) win32_libid_type="x86 archive static";; - esac - fi - ;; - *DLL*) - win32_libid_type="x86 DLL" - ;; - *executable*) # but shell scripts are "executable" too... - case $win32_fileres in - *MS\ Windows\ PE\ Intel*) - win32_libid_type="x86 DLL" - ;; - esac - ;; - esac - $ECHO "$win32_libid_type" -} - - - -# func_extract_an_archive dir oldlib -func_extract_an_archive () -{ - $opt_debug - f_ex_an_ar_dir="$1"; shift - f_ex_an_ar_oldlib="$1" - func_show_eval "(cd \$f_ex_an_ar_dir && $AR x \"\$f_ex_an_ar_oldlib\")" 'exit $?' - if ($AR t "$f_ex_an_ar_oldlib" | sort | sort -uc >/dev/null 2>&1); then - : - else - func_fatal_error "object name conflicts in archive: $f_ex_an_ar_dir/$f_ex_an_ar_oldlib" - fi -} - - -# func_extract_archives gentop oldlib ... -func_extract_archives () -{ - $opt_debug - my_gentop="$1"; shift - my_oldlibs=${1+"$@"} - my_oldobjs="" - my_xlib="" - my_xabs="" - my_xdir="" - - for my_xlib in $my_oldlibs; do - # Extract the objects. - case $my_xlib in - [\\/]* | [A-Za-z]:[\\/]*) my_xabs="$my_xlib" ;; - *) my_xabs=`pwd`"/$my_xlib" ;; - esac - func_basename "$my_xlib" - my_xlib="$func_basename_result" - my_xlib_u=$my_xlib - while :; do - case " $extracted_archives " in - *" $my_xlib_u "*) - func_arith $extracted_serial + 1 - extracted_serial=$func_arith_result - my_xlib_u=lt$extracted_serial-$my_xlib ;; - *) break ;; - esac - done - extracted_archives="$extracted_archives $my_xlib_u" - my_xdir="$my_gentop/$my_xlib_u" - - func_mkdir_p "$my_xdir" - - case $host in - *-darwin*) - func_verbose "Extracting $my_xabs" - # Do not bother doing anything if just a dry run - $opt_dry_run || { - darwin_orig_dir=`pwd` - cd $my_xdir || exit $? - darwin_archive=$my_xabs - darwin_curdir=`pwd` - darwin_base_archive=`basename "$darwin_archive"` - darwin_arches=`$LIPO -info "$darwin_archive" 2>/dev/null | $GREP Architectures 2>/dev/null || true` - if test -n "$darwin_arches"; then - darwin_arches=`$ECHO "$darwin_arches" | $SED -e 's/.*are://'` - darwin_arch= - func_verbose "$darwin_base_archive has multiple architectures $darwin_arches" - for darwin_arch in $darwin_arches ; do - func_mkdir_p "unfat-$$/${darwin_base_archive}-${darwin_arch}" - $LIPO -thin $darwin_arch -output "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" "${darwin_archive}" - cd "unfat-$$/${darwin_base_archive}-${darwin_arch}" - func_extract_an_archive "`pwd`" "${darwin_base_archive}" - cd "$darwin_curdir" - $RM "unfat-$$/${darwin_base_archive}-${darwin_arch}/${darwin_base_archive}" - done # $darwin_arches - ## Okay now we've a bunch of thin objects, gotta fatten them up :) - darwin_filelist=`find unfat-$$ -type f -name \*.o -print -o -name \*.lo -print | $SED -e "$basename" | sort -u` - darwin_file= - darwin_files= - for darwin_file in $darwin_filelist; do - darwin_files=`find unfat-$$ -name $darwin_file -print | $NL2SP` - $LIPO -create -output "$darwin_file" $darwin_files - done # $darwin_filelist - $RM -rf unfat-$$ - cd "$darwin_orig_dir" - else - cd $darwin_orig_dir - func_extract_an_archive "$my_xdir" "$my_xabs" - fi # $darwin_arches - } # !$opt_dry_run - ;; - *) - func_extract_an_archive "$my_xdir" "$my_xabs" - ;; - esac - my_oldobjs="$my_oldobjs "`find $my_xdir -name \*.$objext -print -o -name \*.lo -print | $NL2SP` - done - - func_extract_archives_result="$my_oldobjs" -} - - - -# func_emit_wrapper_part1 [arg=no] -# -# Emit the first part of a libtool wrapper script on stdout. -# For more information, see the description associated with -# func_emit_wrapper(), below. -func_emit_wrapper_part1 () -{ - func_emit_wrapper_part1_arg1=no - if test -n "$1" ; then - func_emit_wrapper_part1_arg1=$1 - fi - - $ECHO "\ -#! $SHELL - -# $output - temporary wrapper script for $objdir/$outputname -# Generated by $PROGRAM (GNU $PACKAGE$TIMESTAMP) $VERSION -# -# The $output program cannot be directly executed until all the libtool -# libraries that it depends on are installed. -# -# This wrapper script should never be moved out of the build directory. -# If it is, it will not operate correctly. - -# Sed substitution that helps us do robust quoting. It backslashifies -# metacharacters that are still active within double-quoted strings. -Xsed='${SED} -e 1s/^X//' -sed_quote_subst='$sed_quote_subst' - -# Be Bourne compatible -if test -n \"\${ZSH_VERSION+set}\" && (emulate sh) >/dev/null 2>&1; then - emulate sh - NULLCMD=: - # Zsh 3.x and 4.x performs word splitting on \${1+\"\$@\"}, which - # is contrary to our usage. Disable this feature. - alias -g '\${1+\"\$@\"}'='\"\$@\"' - setopt NO_GLOB_SUBST -else - case \`(set -o) 2>/dev/null\` in *posix*) set -o posix;; esac -fi -BIN_SH=xpg4; export BIN_SH # for Tru64 -DUALCASE=1; export DUALCASE # for MKS sh - -# The HP-UX ksh and POSIX shell print the target directory to stdout -# if CDPATH is set. -(unset CDPATH) >/dev/null 2>&1 && unset CDPATH - -relink_command=\"$relink_command\" - -# This environment variable determines our operation mode. -if test \"\$libtool_install_magic\" = \"$magic\"; then - # install mode needs the following variables: - generated_by_libtool_version='$macro_version' - notinst_deplibs='$notinst_deplibs' -else - # When we are sourced in execute mode, \$file and \$ECHO are already set. - if test \"\$libtool_execute_magic\" != \"$magic\"; then - ECHO=\"$qecho\" - file=\"\$0\" - # Make sure echo works. - if test \"X\$1\" = X--no-reexec; then - # Discard the --no-reexec flag, and continue. - shift - elif test \"X\`{ \$ECHO '\t'; } 2>/dev/null\`\" = 'X\t'; then - # Yippee, \$ECHO works! - : - else - # Restart under the correct shell, and then maybe \$ECHO will work. - exec $SHELL \"\$0\" --no-reexec \${1+\"\$@\"} - fi - fi\ -" - $ECHO "\ - - # Find the directory that this script lives in. - thisdir=\`\$ECHO \"X\$file\" | \$Xsed -e 's%/[^/]*$%%'\` - test \"x\$thisdir\" = \"x\$file\" && thisdir=. - - # Follow symbolic links until we get to the real thisdir. - file=\`ls -ld \"\$file\" | ${SED} -n 's/.*-> //p'\` - while test -n \"\$file\"; do - destdir=\`\$ECHO \"X\$file\" | \$Xsed -e 's%/[^/]*\$%%'\` - - # If there was a directory component, then change thisdir. - if test \"x\$destdir\" != \"x\$file\"; then - case \"\$destdir\" in - [\\\\/]* | [A-Za-z]:[\\\\/]*) thisdir=\"\$destdir\" ;; - *) thisdir=\"\$thisdir/\$destdir\" ;; - esac - fi - - file=\`\$ECHO \"X\$file\" | \$Xsed -e 's%^.*/%%'\` - file=\`ls -ld \"\$thisdir/\$file\" | ${SED} -n 's/.*-> //p'\` - done -" -} -# end: func_emit_wrapper_part1 - -# func_emit_wrapper_part2 [arg=no] -# -# Emit the second part of a libtool wrapper script on stdout. -# For more information, see the description associated with -# func_emit_wrapper(), below. -func_emit_wrapper_part2 () -{ - func_emit_wrapper_part2_arg1=no - if test -n "$1" ; then - func_emit_wrapper_part2_arg1=$1 - fi - - $ECHO "\ - - # Usually 'no', except on cygwin/mingw when embedded into - # the cwrapper. - WRAPPER_SCRIPT_BELONGS_IN_OBJDIR=$func_emit_wrapper_part2_arg1 - if test \"\$WRAPPER_SCRIPT_BELONGS_IN_OBJDIR\" = \"yes\"; then - # special case for '.' - if test \"\$thisdir\" = \".\"; then - thisdir=\`pwd\` - fi - # remove .libs from thisdir - case \"\$thisdir\" in - *[\\\\/]$objdir ) thisdir=\`\$ECHO \"X\$thisdir\" | \$Xsed -e 's%[\\\\/][^\\\\/]*$%%'\` ;; - $objdir ) thisdir=. ;; - esac - fi - - # Try to get the absolute directory name. - absdir=\`cd \"\$thisdir\" && pwd\` - test -n \"\$absdir\" && thisdir=\"\$absdir\" -" - - if test "$fast_install" = yes; then - $ECHO "\ - program=lt-'$outputname'$exeext - progdir=\"\$thisdir/$objdir\" - - if test ! -f \"\$progdir/\$program\" || - { file=\`ls -1dt \"\$progdir/\$program\" \"\$progdir/../\$program\" 2>/dev/null | ${SED} 1q\`; \\ - test \"X\$file\" != \"X\$progdir/\$program\"; }; then - - file=\"\$\$-\$program\" - - if test ! -d \"\$progdir\"; then - $MKDIR \"\$progdir\" - else - $RM \"\$progdir/\$file\" - fi" - - $ECHO "\ - - # relink executable if necessary - if test -n \"\$relink_command\"; then - if relink_command_output=\`eval \$relink_command 2>&1\`; then : - else - $ECHO \"\$relink_command_output\" >&2 - $RM \"\$progdir/\$file\" - exit 1 - fi - fi - - $MV \"\$progdir/\$file\" \"\$progdir/\$program\" 2>/dev/null || - { $RM \"\$progdir/\$program\"; - $MV \"\$progdir/\$file\" \"\$progdir/\$program\"; } - $RM \"\$progdir/\$file\" - fi" - else - $ECHO "\ - program='$outputname' - progdir=\"\$thisdir/$objdir\" -" - fi - - $ECHO "\ - - if test -f \"\$progdir/\$program\"; then" - - # Export our shlibpath_var if we have one. - if test "$shlibpath_overrides_runpath" = yes && test -n "$shlibpath_var" && test -n "$temp_rpath"; then - $ECHO "\ - # Add our own library path to $shlibpath_var - $shlibpath_var=\"$temp_rpath\$$shlibpath_var\" - - # Some systems cannot cope with colon-terminated $shlibpath_var - # The second colon is a workaround for a bug in BeOS R4 sed - $shlibpath_var=\`\$ECHO \"X\$$shlibpath_var\" | \$Xsed -e 's/::*\$//'\` - - export $shlibpath_var -" - fi - - # fixup the dll searchpath if we need to. - if test -n "$dllsearchpath"; then - $ECHO "\ - # Add the dll search path components to the executable PATH - PATH=$dllsearchpath:\$PATH -" - fi - - $ECHO "\ - if test \"\$libtool_execute_magic\" != \"$magic\"; then - # Run the actual program with our arguments. -" - case $host in - # Backslashes separate directories on plain windows - *-*-mingw | *-*-os2* | *-cegcc*) - $ECHO "\ - exec \"\$progdir\\\\\$program\" \${1+\"\$@\"} -" - ;; - - *) - $ECHO "\ - exec \"\$progdir/\$program\" \${1+\"\$@\"} -" - ;; - esac - $ECHO "\ - \$ECHO \"\$0: cannot exec \$program \$*\" 1>&2 - exit 1 - fi - else - # The program doesn't exist. - \$ECHO \"\$0: error: \\\`\$progdir/\$program' does not exist\" 1>&2 - \$ECHO \"This script is just a wrapper for \$program.\" 1>&2 - $ECHO \"See the $PACKAGE documentation for more information.\" 1>&2 - exit 1 - fi -fi\ -" -} -# end: func_emit_wrapper_part2 - - -# func_emit_wrapper [arg=no] -# -# Emit a libtool wrapper script on stdout. -# Don't directly open a file because we may want to -# incorporate the script contents within a cygwin/mingw -# wrapper executable. Must ONLY be called from within -# func_mode_link because it depends on a number of variables -# set therein. -# -# ARG is the value that the WRAPPER_SCRIPT_BELONGS_IN_OBJDIR -# variable will take. If 'yes', then the emitted script -# will assume that the directory in which it is stored is -# the $objdir directory. This is a cygwin/mingw-specific -# behavior. -func_emit_wrapper () -{ - func_emit_wrapper_arg1=no - if test -n "$1" ; then - func_emit_wrapper_arg1=$1 - fi - - # split this up so that func_emit_cwrapperexe_src - # can call each part independently. - func_emit_wrapper_part1 "${func_emit_wrapper_arg1}" - func_emit_wrapper_part2 "${func_emit_wrapper_arg1}" -} - - -# func_to_host_path arg -# -# Convert paths to host format when used with build tools. -# Intended for use with "native" mingw (where libtool itself -# is running under the msys shell), or in the following cross- -# build environments: -# $build $host -# mingw (msys) mingw [e.g. native] -# cygwin mingw -# *nix + wine mingw -# where wine is equipped with the `winepath' executable. -# In the native mingw case, the (msys) shell automatically -# converts paths for any non-msys applications it launches, -# but that facility isn't available from inside the cwrapper. -# Similar accommodations are necessary for $host mingw and -# $build cygwin. Calling this function does no harm for other -# $host/$build combinations not listed above. -# -# ARG is the path (on $build) that should be converted to -# the proper representation for $host. The result is stored -# in $func_to_host_path_result. -func_to_host_path () -{ - func_to_host_path_result="$1" - if test -n "$1" ; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - case $build in - *mingw* ) # actually, msys - # awkward: cmd appends spaces to result - lt_sed_strip_trailing_spaces="s/[ ]*\$//" - func_to_host_path_tmp1=`( cmd //c echo "$1" |\ - $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""` - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_path_tmp1=`cygpath -w "$1"` - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # Unfortunately, winepath does not exit with a non-zero - # error code, so we are forced to check the contents of - # stdout. On the other hand, if the command is not - # found, the shell will set an exit code of 127 and print - # *an error message* to stdout. So we must check for both - # error code of zero AND non-empty stdout, which explains - # the odd construction: - func_to_host_path_tmp1=`winepath -w "$1" 2>/dev/null` - if test "$?" -eq 0 && test -n "${func_to_host_path_tmp1}"; then - func_to_host_path_result=`echo "$func_to_host_path_tmp1" |\ - $SED -e "$lt_sed_naive_backslashify"` - else - # Allow warning below. - func_to_host_path_result="" - fi - ;; - esac - if test -z "$func_to_host_path_result" ; then - func_error "Could not determine host path corresponding to" - func_error " '$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback: - func_to_host_path_result="$1" - fi - ;; - esac - fi -} -# end: func_to_host_path - -# func_to_host_pathlist arg -# -# Convert pathlists to host format when used with build tools. -# See func_to_host_path(), above. This function supports the -# following $build/$host combinations (but does no harm for -# combinations not listed here): -# $build $host -# mingw (msys) mingw [e.g. native] -# cygwin mingw -# *nix + wine mingw -# -# Path separators are also converted from $build format to -# $host format. If ARG begins or ends with a path separator -# character, it is preserved (but converted to $host format) -# on output. -# -# ARG is a pathlist (on $build) that should be converted to -# the proper representation on $host. The result is stored -# in $func_to_host_pathlist_result. -func_to_host_pathlist () -{ - func_to_host_pathlist_result="$1" - if test -n "$1" ; then - case $host in - *mingw* ) - lt_sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g' - # Remove leading and trailing path separator characters from - # ARG. msys behavior is inconsistent here, cygpath turns them - # into '.;' and ';.', and winepath ignores them completely. - func_to_host_pathlist_tmp2="$1" - # Once set for this call, this variable should not be - # reassigned. It is used in tha fallback case. - func_to_host_pathlist_tmp1=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e 's|^:*||' -e 's|:*$||'` - case $build in - *mingw* ) # Actually, msys. - # Awkward: cmd appends spaces to result. - lt_sed_strip_trailing_spaces="s/[ ]*\$//" - func_to_host_pathlist_tmp2=`( cmd //c echo "$func_to_host_pathlist_tmp1" |\ - $SED -e "$lt_sed_strip_trailing_spaces" ) 2>/dev/null || echo ""` - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - *cygwin* ) - func_to_host_pathlist_tmp2=`cygpath -w -p "$func_to_host_pathlist_tmp1"` - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp2" |\ - $SED -e "$lt_sed_naive_backslashify"` - ;; - * ) - # unfortunately, winepath doesn't convert pathlists - func_to_host_pathlist_result="" - func_to_host_pathlist_oldIFS=$IFS - IFS=: - for func_to_host_pathlist_f in $func_to_host_pathlist_tmp1 ; do - IFS=$func_to_host_pathlist_oldIFS - if test -n "$func_to_host_pathlist_f" ; then - func_to_host_path "$func_to_host_pathlist_f" - if test -n "$func_to_host_path_result" ; then - if test -z "$func_to_host_pathlist_result" ; then - func_to_host_pathlist_result="$func_to_host_path_result" - else - func_to_host_pathlist_result="$func_to_host_pathlist_result;$func_to_host_path_result" - fi - fi - fi - IFS=: - done - IFS=$func_to_host_pathlist_oldIFS - ;; - esac - if test -z "$func_to_host_pathlist_result" ; then - func_error "Could not determine the host path(s) corresponding to" - func_error " '$1'" - func_error "Continuing, but uninstalled executables may not work." - # Fallback. This may break if $1 contains DOS-style drive - # specifications. The fix is not to complicate the expression - # below, but for the user to provide a working wine installation - # with winepath so that path translation in the cross-to-mingw - # case works properly. - lt_replace_pathsep_nix_to_dos="s|:|;|g" - func_to_host_pathlist_result=`echo "$func_to_host_pathlist_tmp1" |\ - $SED -e "$lt_replace_pathsep_nix_to_dos"` - fi - # Now, add the leading and trailing path separators back - case "$1" in - :* ) func_to_host_pathlist_result=";$func_to_host_pathlist_result" - ;; - esac - case "$1" in - *: ) func_to_host_pathlist_result="$func_to_host_pathlist_result;" - ;; - esac - ;; - esac - fi -} -# end: func_to_host_pathlist - -# func_emit_cwrapperexe_src -# emit the source code for a wrapper executable on stdout -# Must ONLY be called from within func_mode_link because -# it depends on a number of variable set therein. -func_emit_cwrapperexe_src () -{ - cat < -#include -#ifdef _MSC_VER -# include -# include -# include -# define setmode _setmode -#else -# include -# include -# ifdef __CYGWIN__ -# include -# define HAVE_SETENV -# ifdef __STRICT_ANSI__ -char *realpath (const char *, char *); -int putenv (char *); -int setenv (const char *, const char *, int); -# endif -# endif -#endif -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(PATH_MAX) -# define LT_PATHMAX PATH_MAX -#elif defined(MAXPATHLEN) -# define LT_PATHMAX MAXPATHLEN -#else -# define LT_PATHMAX 1024 -#endif - -#ifndef S_IXOTH -# define S_IXOTH 0 -#endif -#ifndef S_IXGRP -# define S_IXGRP 0 -#endif - -#ifdef _MSC_VER -# define S_IXUSR _S_IEXEC -# define stat _stat -# ifndef _INTPTR_T_DEFINED -# define intptr_t int -# endif -#endif - -#ifndef DIR_SEPARATOR -# define DIR_SEPARATOR '/' -# define PATH_SEPARATOR ':' -#endif - -#if defined (_WIN32) || defined (__MSDOS__) || defined (__DJGPP__) || \ - defined (__OS2__) -# define HAVE_DOS_BASED_FILE_SYSTEM -# define FOPEN_WB "wb" -# ifndef DIR_SEPARATOR_2 -# define DIR_SEPARATOR_2 '\\' -# endif -# ifndef PATH_SEPARATOR_2 -# define PATH_SEPARATOR_2 ';' -# endif -#endif - -#ifndef DIR_SEPARATOR_2 -# define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR) -#else /* DIR_SEPARATOR_2 */ -# define IS_DIR_SEPARATOR(ch) \ - (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2)) -#endif /* DIR_SEPARATOR_2 */ - -#ifndef PATH_SEPARATOR_2 -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR) -#else /* PATH_SEPARATOR_2 */ -# define IS_PATH_SEPARATOR(ch) ((ch) == PATH_SEPARATOR_2) -#endif /* PATH_SEPARATOR_2 */ - -#ifdef __CYGWIN__ -# define FOPEN_WB "wb" -#endif - -#ifndef FOPEN_WB -# define FOPEN_WB "w" -#endif -#ifndef _O_BINARY -# define _O_BINARY 0 -#endif - -#define XMALLOC(type, num) ((type *) xmalloc ((num) * sizeof(type))) -#define XFREE(stale) do { \ - if (stale) { free ((void *) stale); stale = 0; } \ -} while (0) - -#undef LTWRAPPER_DEBUGPRINTF -#if defined DEBUGWRAPPER -# define LTWRAPPER_DEBUGPRINTF(args) ltwrapper_debugprintf args -static void -ltwrapper_debugprintf (const char *fmt, ...) -{ - va_list args; - va_start (args, fmt); - (void) vfprintf (stderr, fmt, args); - va_end (args); -} -#else -# define LTWRAPPER_DEBUGPRINTF(args) -#endif - -const char *program_name = NULL; - -void *xmalloc (size_t num); -char *xstrdup (const char *string); -const char *base_name (const char *name); -char *find_executable (const char *wrapper); -char *chase_symlinks (const char *pathspec); -int make_executable (const char *path); -int check_executable (const char *path); -char *strendzap (char *str, const char *pat); -void lt_fatal (const char *message, ...); -void lt_setenv (const char *name, const char *value); -char *lt_extend_str (const char *orig_value, const char *add, int to_end); -void lt_opt_process_env_set (const char *arg); -void lt_opt_process_env_prepend (const char *arg); -void lt_opt_process_env_append (const char *arg); -int lt_split_name_value (const char *arg, char** name, char** value); -void lt_update_exe_path (const char *name, const char *value); -void lt_update_lib_path (const char *name, const char *value); - -static const char *script_text_part1 = -EOF - - func_emit_wrapper_part1 yes | - $SED -e 's/\([\\"]\)/\\\1/g' \ - -e 's/^/ "/' -e 's/$/\\n"/' - echo ";" - cat <"))); - for (i = 0; i < newargc; i++) - { - LTWRAPPER_DEBUGPRINTF (("(main) newargz[%d] : %s\n", i, (newargz[i] ? newargz[i] : ""))); - } - -EOF - - case $host_os in - mingw*) - cat <<"EOF" - /* execv doesn't actually work on mingw as expected on unix */ - rval = _spawnv (_P_WAIT, lt_argv_zero, (const char * const *) newargz); - if (rval == -1) - { - /* failed to start process */ - LTWRAPPER_DEBUGPRINTF (("(main) failed to launch target \"%s\": errno = %d\n", lt_argv_zero, errno)); - return 127; - } - return rval; -EOF - ;; - *) - cat <<"EOF" - execv (lt_argv_zero, newargz); - return rval; /* =127, but avoids unused variable warning */ -EOF - ;; - esac - - cat <<"EOF" -} - -void * -xmalloc (size_t num) -{ - void *p = (void *) malloc (num); - if (!p) - lt_fatal ("Memory exhausted"); - - return p; -} - -char * -xstrdup (const char *string) -{ - return string ? strcpy ((char *) xmalloc (strlen (string) + 1), - string) : NULL; -} - -const char * -base_name (const char *name) -{ - const char *base; - -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - /* Skip over the disk name in MSDOS pathnames. */ - if (isalpha ((unsigned char) name[0]) && name[1] == ':') - name += 2; -#endif - - for (base = name; *name; name++) - if (IS_DIR_SEPARATOR (*name)) - base = name + 1; - return base; -} - -int -check_executable (const char *path) -{ - struct stat st; - - LTWRAPPER_DEBUGPRINTF (("(check_executable) : %s\n", - path ? (*path ? path : "EMPTY!") : "NULL!")); - if ((!path) || (!*path)) - return 0; - - if ((stat (path, &st) >= 0) - && (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) - return 1; - else - return 0; -} - -int -make_executable (const char *path) -{ - int rval = 0; - struct stat st; - - LTWRAPPER_DEBUGPRINTF (("(make_executable) : %s\n", - path ? (*path ? path : "EMPTY!") : "NULL!")); - if ((!path) || (!*path)) - return 0; - - if (stat (path, &st) >= 0) - { - rval = chmod (path, st.st_mode | S_IXOTH | S_IXGRP | S_IXUSR); - } - return rval; -} - -/* Searches for the full path of the wrapper. Returns - newly allocated full path name if found, NULL otherwise - Does not chase symlinks, even on platforms that support them. -*/ -char * -find_executable (const char *wrapper) -{ - int has_slash = 0; - const char *p; - const char *p_next; - /* static buffer for getcwd */ - char tmp[LT_PATHMAX + 1]; - int tmp_len; - char *concat_name; - - LTWRAPPER_DEBUGPRINTF (("(find_executable) : %s\n", - wrapper ? (*wrapper ? wrapper : "EMPTY!") : "NULL!")); - - if ((wrapper == NULL) || (*wrapper == '\0')) - return NULL; - - /* Absolute path? */ -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - if (isalpha ((unsigned char) wrapper[0]) && wrapper[1] == ':') - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - else - { -#endif - if (IS_DIR_SEPARATOR (wrapper[0])) - { - concat_name = xstrdup (wrapper); - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } -#if defined (HAVE_DOS_BASED_FILE_SYSTEM) - } -#endif - - for (p = wrapper; *p; p++) - if (*p == '/') - { - has_slash = 1; - break; - } - if (!has_slash) - { - /* no slashes; search PATH */ - const char *path = getenv ("PATH"); - if (path != NULL) - { - for (p = path; *p; p = p_next) - { - const char *q; - size_t p_len; - for (q = p; *q; q++) - if (IS_PATH_SEPARATOR (*q)) - break; - p_len = q - p; - p_next = (*q == '\0' ? q : q + 1); - if (p_len == 0) - { - /* empty path: current directory */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal ("getcwd failed"); - tmp_len = strlen (tmp); - concat_name = - XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - } - else - { - concat_name = - XMALLOC (char, p_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, p, p_len); - concat_name[p_len] = '/'; - strcpy (concat_name + p_len + 1, wrapper); - } - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - } - } - /* not found in PATH; assume curdir */ - } - /* Relative path | not found in path: prepend cwd */ - if (getcwd (tmp, LT_PATHMAX) == NULL) - lt_fatal ("getcwd failed"); - tmp_len = strlen (tmp); - concat_name = XMALLOC (char, tmp_len + 1 + strlen (wrapper) + 1); - memcpy (concat_name, tmp, tmp_len); - concat_name[tmp_len] = '/'; - strcpy (concat_name + tmp_len + 1, wrapper); - - if (check_executable (concat_name)) - return concat_name; - XFREE (concat_name); - return NULL; -} - -char * -chase_symlinks (const char *pathspec) -{ -#ifndef S_ISLNK - return xstrdup (pathspec); -#else - char buf[LT_PATHMAX]; - struct stat s; - char *tmp_pathspec = xstrdup (pathspec); - char *p; - int has_symlinks = 0; - while (strlen (tmp_pathspec) && !has_symlinks) - { - LTWRAPPER_DEBUGPRINTF (("checking path component for symlinks: %s\n", - tmp_pathspec)); - if (lstat (tmp_pathspec, &s) == 0) - { - if (S_ISLNK (s.st_mode) != 0) - { - has_symlinks = 1; - break; - } - - /* search backwards for last DIR_SEPARATOR */ - p = tmp_pathspec + strlen (tmp_pathspec) - 1; - while ((p > tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - p--; - if ((p == tmp_pathspec) && (!IS_DIR_SEPARATOR (*p))) - { - /* no more DIR_SEPARATORS left */ - break; - } - *p = '\0'; - } - else - { - char *errstr = strerror (errno); - lt_fatal ("Error accessing file %s (%s)", tmp_pathspec, errstr); - } - } - XFREE (tmp_pathspec); - - if (!has_symlinks) - { - return xstrdup (pathspec); - } - - tmp_pathspec = realpath (pathspec, buf); - if (tmp_pathspec == 0) - { - lt_fatal ("Could not follow symlinks for %s", pathspec); - } - return xstrdup (tmp_pathspec); -#endif -} - -char * -strendzap (char *str, const char *pat) -{ - size_t len, patlen; - - assert (str != NULL); - assert (pat != NULL); - - len = strlen (str); - patlen = strlen (pat); - - if (patlen <= len) - { - str += len - patlen; - if (strcmp (str, pat) == 0) - *str = '\0'; - } - return str; -} - -static void -lt_error_core (int exit_status, const char *mode, - const char *message, va_list ap) -{ - fprintf (stderr, "%s: %s: ", program_name, mode); - vfprintf (stderr, message, ap); - fprintf (stderr, ".\n"); - - if (exit_status >= 0) - exit (exit_status); -} - -void -lt_fatal (const char *message, ...) -{ - va_list ap; - va_start (ap, message); - lt_error_core (EXIT_FAILURE, "FATAL", message, ap); - va_end (ap); -} - -void -lt_setenv (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_setenv) setting '%s' to '%s'\n", - (name ? name : ""), - (value ? value : ""))); - { -#ifdef HAVE_SETENV - /* always make a copy, for consistency with !HAVE_SETENV */ - char *str = xstrdup (value); - setenv (name, str, 1); -#else - int len = strlen (name) + 1 + strlen (value) + 1; - char *str = XMALLOC (char, len); - sprintf (str, "%s=%s", name, value); - if (putenv (str) != EXIT_SUCCESS) - { - XFREE (str); - } -#endif - } -} - -char * -lt_extend_str (const char *orig_value, const char *add, int to_end) -{ - char *new_value; - if (orig_value && *orig_value) - { - int orig_value_len = strlen (orig_value); - int add_len = strlen (add); - new_value = XMALLOC (char, add_len + orig_value_len + 1); - if (to_end) - { - strcpy (new_value, orig_value); - strcpy (new_value + orig_value_len, add); - } - else - { - strcpy (new_value, add); - strcpy (new_value + add_len, orig_value); - } - } - else - { - new_value = xstrdup (add); - } - return new_value; -} - -int -lt_split_name_value (const char *arg, char** name, char** value) -{ - const char *p; - int len; - if (!arg || !*arg) - return 1; - - p = strchr (arg, (int)'='); - - if (!p) - return 1; - - *value = xstrdup (++p); - - len = strlen (arg) - strlen (*value); - *name = XMALLOC (char, len); - strncpy (*name, arg, len-1); - (*name)[len - 1] = '\0'; - - return 0; -} - -void -lt_opt_process_env_set (const char *arg) -{ - char *name = NULL; - char *value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_set_opt, arg); - } - - lt_setenv (name, value); - XFREE (name); - XFREE (value); -} - -void -lt_opt_process_env_prepend (const char *arg) -{ - char *name = NULL; - char *value = NULL; - char *new_value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_prepend_opt, arg); - } - - new_value = lt_extend_str (getenv (name), value, 0); - lt_setenv (name, new_value); - XFREE (new_value); - XFREE (name); - XFREE (value); -} - -void -lt_opt_process_env_append (const char *arg) -{ - char *name = NULL; - char *value = NULL; - char *new_value = NULL; - - if (lt_split_name_value (arg, &name, &value) != 0) - { - XFREE (name); - XFREE (value); - lt_fatal ("bad argument for %s: '%s'", env_append_opt, arg); - } - - new_value = lt_extend_str (getenv (name), value, 1); - lt_setenv (name, new_value); - XFREE (new_value); - XFREE (name); - XFREE (value); -} - -void -lt_update_exe_path (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_update_exe_path) modifying '%s' by prepending '%s'\n", - (name ? name : ""), - (value ? value : ""))); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - /* some systems can't cope with a ':'-terminated path #' */ - int len = strlen (new_value); - while (((len = strlen (new_value)) > 0) && IS_PATH_SEPARATOR (new_value[len-1])) - { - new_value[len-1] = '\0'; - } - lt_setenv (name, new_value); - XFREE (new_value); - } -} - -void -lt_update_lib_path (const char *name, const char *value) -{ - LTWRAPPER_DEBUGPRINTF (("(lt_update_lib_path) modifying '%s' by prepending '%s'\n", - (name ? name : ""), - (value ? value : ""))); - - if (name && *name && value && *value) - { - char *new_value = lt_extend_str (getenv (name), value, 0); - lt_setenv (name, new_value); - XFREE (new_value); - } -} - - -EOF -} -# end: func_emit_cwrapperexe_src - -# func_mode_link arg... -func_mode_link () -{ - $opt_debug - case $host in - *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2* | *-cegcc*) - # It is impossible to link a dll without this setting, and - # we shouldn't force the makefile maintainer to figure out - # which system we are compiling for in order to pass an extra - # flag for every libtool invocation. - # allow_undefined=no - - # FIXME: Unfortunately, there are problems with the above when trying - # to make a dll which has undefined symbols, in which case not - # even a static library is built. For now, we need to specify - # -no-undefined on the libtool link line when we can be certain - # that all symbols are satisfied, otherwise we get a static library. - allow_undefined=yes - ;; - *) - allow_undefined=yes - ;; - esac - libtool_args=$nonopt - base_compile="$nonopt $@" - compile_command=$nonopt - finalize_command=$nonopt - - compile_rpath= - finalize_rpath= - compile_shlibpath= - finalize_shlibpath= - convenience= - old_convenience= - deplibs= - old_deplibs= - compiler_flags= - linker_flags= - dllsearchpath= - lib_search_path=`pwd` - inst_prefix_dir= - new_inherited_linker_flags= - - avoid_version=no - dlfiles= - dlprefiles= - dlself=no - export_dynamic=no - export_symbols= - export_symbols_regex= - generated= - libobjs= - ltlibs= - module=no - no_install=no - objs= - non_pic_objects= - precious_files_regex= - prefer_static_libs=no - preload=no - prev= - prevarg= - release= - rpath= - xrpath= - perm_rpath= - temp_rpath= - thread_safe=no - vinfo= - vinfo_number=no - weak_libs= - single_module="${wl}-single_module" - func_infer_tag $base_compile - - # We need to know -static, to get the right output filenames. - for arg - do - case $arg in - -shared) - test "$build_libtool_libs" != yes && \ - func_fatal_configuration "can not build a shared library" - build_old_libs=no - break - ;; - -all-static | -static | -static-libtool-libs) - case $arg in - -all-static) - if test "$build_libtool_libs" = yes && test -z "$link_static_flag"; then - func_warning "complete static linking is impossible in this configuration" - fi - if test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - -static) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=built - ;; - -static-libtool-libs) - if test -z "$pic_flag" && test -n "$link_static_flag"; then - dlopen_self=$dlopen_self_static - fi - prefer_static_libs=yes - ;; - esac - build_libtool_libs=no - build_old_libs=yes - break - ;; - esac - done - - # See if our shared archives depend on static archives. - test -n "$old_archive_from_new_cmds" && build_old_libs=yes - - # Go through the arguments, transforming them on the way. - while test "$#" -gt 0; do - arg="$1" - shift - func_quote_for_eval "$arg" - qarg=$func_quote_for_eval_unquoted_result - func_append libtool_args " $func_quote_for_eval_result" - - # If the previous option needs an argument, assign it. - if test -n "$prev"; then - case $prev in - output) - func_append compile_command " @OUTPUT@" - func_append finalize_command " @OUTPUT@" - ;; - esac - - case $prev in - dlfiles|dlprefiles) - if test "$preload" = no; then - # Add the symbol object into the linking commands. - func_append compile_command " @SYMFILE@" - func_append finalize_command " @SYMFILE@" - preload=yes - fi - case $arg in - *.la | *.lo) ;; # We handle these cases below. - force) - if test "$dlself" = no; then - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - self) - if test "$prev" = dlprefiles; then - dlself=yes - elif test "$prev" = dlfiles && test "$dlopen_self" != yes; then - dlself=yes - else - dlself=needless - export_dynamic=yes - fi - prev= - continue - ;; - *) - if test "$prev" = dlfiles; then - dlfiles="$dlfiles $arg" - else - dlprefiles="$dlprefiles $arg" - fi - prev= - continue - ;; - esac - ;; - expsyms) - export_symbols="$arg" - test -f "$arg" \ - || func_fatal_error "symbol file \`$arg' does not exist" - prev= - continue - ;; - expsyms_regex) - export_symbols_regex="$arg" - prev= - continue - ;; - framework) - case $host in - *-*-darwin*) - case "$deplibs " in - *" $qarg.ltframework "*) ;; - *) deplibs="$deplibs $qarg.ltframework" # this is fixed later - ;; - esac - ;; - esac - prev= - continue - ;; - inst_prefix) - inst_prefix_dir="$arg" - prev= - continue - ;; - objectlist) - if test -f "$arg"; then - save_arg=$arg - moreargs= - for fil in `cat "$save_arg"` - do -# moreargs="$moreargs $fil" - arg=$fil - # A libtool-controlled object. - - # Check to see that this really is a libtool object. - if func_lalib_unsafe_p "$arg"; then - pic_object= - non_pic_object= - - # Read the .lo file - func_source "$arg" - - if test -z "$pic_object" || - test -z "$non_pic_object" || - test "$pic_object" = none && - test "$non_pic_object" = none; then - func_fatal_error "cannot find name of object for \`$arg'" - fi - - # Extract subdirectory from the argument. - func_dirname "$arg" "/" "" - xdir="$func_dirname_result" - - if test "$pic_object" != none; then - # Prepend the subdirectory the object is found in. - pic_object="$xdir$pic_object" - - if test "$prev" = dlfiles; then - if test "$build_libtool_libs" = yes && test "$dlopen_support" = yes; then - dlfiles="$dlfiles $pic_object" - prev= - continue - else - # If libtool objects are unsupported, then we need to preload. - prev=dlprefiles - fi - fi - - # CHECK ME: I think I busted this. -Ossama - if test "$prev" = dlprefiles; then - # Preload the old-style object. - dlprefiles="$dlprefiles $pic_object" - prev= - fi - - # A PIC object. - func_append libobjs " $pic_object" - arg="$pic_object" - fi - - # Non-PIC object. - if test "$non_pic_object" != none; then - # Prepend the subdirectory the object is found in. - non_pic_object="$xdir$non_pic_object" - - # A standard non-PIC object - func_append non_pic_objects " $non_pic_object" - if test -z "$pic_object" || test "$pic_object" = none ; then - arg="$non_pic_object" - fi - else - # If the PIC object exists, use it instead. - # $xdir was prepended to $pic_object above. - non_pic_object="$pic_object" - func_append non_pic_objects " $non_pic_object" - fi - else - # Only an error if not doing a dry-run. - if $opt_dry_run; then - # Extract subdirectory from the argument. - func_dirname "$arg" "/" "" - xdir="$func_dirname_result" - - func_lo2o "$arg" - pic_object=$xdir$objdir/$func_lo2o_result - non_pic_object=$xdir$func_lo2o_result - func_append libobjs " $pic_object" - func_append non_pic_objects " $non_pic_object" - else - func_fatal_error "\`$arg' is not a valid libtool object" - fi - fi - done - else - func_fatal_error "link input file \`$arg' does not exist" - fi - arg=$save_arg - prev= - continue - ;; - precious_regex) - precious_files_regex="$arg" - prev= - continue - ;; - release) - release="-$arg" - prev= - continue - ;; - rpath | xrpath) - # We need an absolute path. - case $arg in - [\\/]* | [A-Za-z]:[\\/]*) ;; - *) - func_fatal_error "only absolute run-paths are allowed" - ;; - esac - if test "$prev" = rpath; then - case "$rpath " in - *" $arg "*) ;; - *) rpath="$rpath $arg" ;; - esac - else - case "$xrpath " in - *" $arg "*) ;; - *) xrpath="$xrpath $arg" ;; - esac - fi - prev= - continue - ;; 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- *) lib_linked=no ;; - esac - - if test "$lib_linked" != yes; then - func_fatal_configuration "unsupported hardcode properties" - fi - - if test -n "$add_shlibpath"; then - case :$compile_shlibpath: in - *":$add_shlibpath:"*) ;; - *) compile_shlibpath="$compile_shlibpath$add_shlibpath:" ;; - esac - fi - if test "$linkmode" = prog; then - test -n "$add_dir" && compile_deplibs="$add_dir $compile_deplibs" - test -n "$add" && compile_deplibs="$add $compile_deplibs" - else - test -n "$add_dir" && deplibs="$add_dir $deplibs" - test -n "$add" && deplibs="$add $deplibs" - if test "$hardcode_direct" != yes && - test "$hardcode_minus_L" != yes && - test "$hardcode_shlibpath_var" = yes; then - case :$finalize_shlibpath: in - *":$libdir:"*) ;; - *) finalize_shlibpath="$finalize_shlibpath$libdir:" ;; - esac - fi - fi - fi - - if test "$linkmode" = prog || test "$mode" = relink; then - add_shlibpath= - add_dir= - add= - # Finalize command for both is simple: just hardcode it. - if test "$hardcode_direct" = yes && - test "$hardcode_direct_absolute" = no; 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then - # Here we assume that one of hardcode_direct or hardcode_minus_L - # is not unsupported. 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[puts("Hello, World!"); return 0;], - AC_MSG_RESULT([yes]), - AC_MSG_RESULT([no]) - CFLAGS="$ac_add_cflags__old_cflags") - ]) -])# AC_ADD_CFLAGS diff --git a/ExternalLibs/libvorbis-1.3.1/m4/ogg.m4 b/ExternalLibs/libvorbis-1.3.1/m4/ogg.m4 deleted file mode 100644 index 1d3fb8b..0000000 --- a/ExternalLibs/libvorbis-1.3.1/m4/ogg.m4 +++ /dev/null @@ -1,116 +0,0 @@ -# Configure paths for libogg -# Jack Moffitt 10-21-2000 -# Shamelessly stolen from Owen Taylor and Manish Singh - -dnl XIPH_PATH_OGG([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) -dnl Test for libogg, and define OGG_CFLAGS and OGG_LIBS -dnl -AC_DEFUN([XIPH_PATH_OGG], -[dnl -dnl Get the cflags and libraries -dnl -AC_ARG_WITH(ogg,AC_HELP_STRING([--with-ogg=PFX],[Prefix where libogg is installed (optional)]), ogg_prefix="$withval", ogg_prefix="") -AC_ARG_WITH(ogg-libraries,AC_HELP_STRING([--with-ogg-libraries=DIR],[Directory where libogg library is installed (optional)]), ogg_libraries="$withval", ogg_libraries="") -AC_ARG_WITH(ogg-includes,AC_HELP_STRING([--with-ogg-includes=DIR],[Directory where libogg header files are installed (optional)]), ogg_includes="$withval", ogg_includes="") -AC_ARG_ENABLE(oggtest,AC_HELP_STRING([--disable-oggtest],[Do not try to compile and run a test Ogg program]),, enable_oggtest=yes) - - if test "x$ogg_libraries" != "x" ; then - OGG_LIBS="-L$ogg_libraries" - elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then - OGG_LIBS="" - elif test "x$ogg_prefix" != "x" ; then - OGG_LIBS="-L$ogg_prefix/lib" - elif test "x$prefix" != "xNONE" ; then - OGG_LIBS="-L$prefix/lib" - fi - - if test "x$ogg_prefix" != "xno" ; then - OGG_LIBS="$OGG_LIBS -logg" - fi - - if test "x$ogg_includes" != "x" ; then - OGG_CFLAGS="-I$ogg_includes" - elif test "x$ogg_prefix" = "xno" || test "x$ogg_prefix" = "xyes" ; then - OGG_CFLAGS="" - elif test "x$ogg_prefix" != "x" ; then - OGG_CFLAGS="-I$ogg_prefix/include" - elif test "x$prefix" != "xNONE"; then - OGG_CFLAGS="-I$prefix/include" - fi - - AC_MSG_CHECKING(for Ogg) - if test "x$ogg_prefix" = "xno" ; then - no_ogg="disabled" - enable_oggtest="no" - else - no_ogg="" - fi - - - if test "x$enable_oggtest" = "xyes" ; then - ac_save_CFLAGS="$CFLAGS" - ac_save_LIBS="$LIBS" - CFLAGS="$CFLAGS $OGG_CFLAGS" - LIBS="$LIBS $OGG_LIBS" -dnl -dnl Now check if the installed Ogg is sufficiently new. -dnl - rm -f conf.oggtest - AC_TRY_RUN([ -#include -#include -#include -#include - -int main () -{ - system("touch conf.oggtest"); - return 0; -} - -],, no_ogg=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - - if test "x$no_ogg" = "xdisabled" ; then - AC_MSG_RESULT(no) - ifelse([$2], , :, [$2]) - elif test "x$no_ogg" = "x" ; then - AC_MSG_RESULT(yes) - ifelse([$1], , :, [$1]) - else - AC_MSG_RESULT(no) - if test -f conf.oggtest ; then - : - else - echo "*** Could not run Ogg test program, checking why..." - CFLAGS="$CFLAGS $OGG_CFLAGS" - LIBS="$LIBS $OGG_LIBS" - AC_TRY_LINK([ -#include -#include -], [ return 0; ], - [ echo "*** The test program compiled, but did not run. This usually means" - echo "*** that the run-time linker is not finding Ogg or finding the wrong" - echo "*** version of Ogg. If it is not finding Ogg, you'll need to set your" - echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" - echo "*** to the installed location Also, make sure you have run ldconfig if that" - echo "*** is required on your system" - echo "***" - echo "*** If you have an old version installed, it is best to remove it, although" - echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], - [ echo "*** The test program failed to compile or link. See the file config.log for the" - echo "*** exact error that occured. This usually means Ogg was incorrectly installed" - echo "*** or that you have moved Ogg since it was installed." ]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - OGG_CFLAGS="" - OGG_LIBS="" - ifelse([$2], , :, [$2]) - fi - AC_SUBST(OGG_CFLAGS) - AC_SUBST(OGG_LIBS) - rm -f conf.oggtest -]) diff --git a/ExternalLibs/libvorbis-1.3.1/m4/pkg.m4 b/ExternalLibs/libvorbis-1.3.1/m4/pkg.m4 deleted file mode 100644 index 996e294..0000000 --- a/ExternalLibs/libvorbis-1.3.1/m4/pkg.m4 +++ /dev/null @@ -1,157 +0,0 @@ -# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- -# -# Copyright © 2004 Scott James Remnant . -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, but -# WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -# -# As a special exception to the GNU General Public License, if you -# distribute this file as part of a program that contains a -# configuration script generated by Autoconf, you may include it under -# the same distribution terms that you use for the rest of that program. - -# PKG_PROG_PKG_CONFIG([MIN-VERSION]) -# ---------------------------------- -AC_DEFUN([PKG_PROG_PKG_CONFIG], -[m4_pattern_forbid([^_?PKG_[A-Z_]+$]) -m4_pattern_allow([^PKG_CONFIG(_PATH)?$]) -AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl -if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then - AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) -fi -if test -n "$PKG_CONFIG"; then - _pkg_min_version=m4_default([$1], [0.9.0]) - AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) - if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then - AC_MSG_RESULT([yes]) - else - AC_MSG_RESULT([no]) - PKG_CONFIG="" - fi - -fi[]dnl -])# PKG_PROG_PKG_CONFIG - -# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) -# -# Check to see whether a particular set of modules exists. Similar -# to PKG_CHECK_MODULES(), but does not set variables or print errors. -# -# -# Similar to PKG_CHECK_MODULES, make sure that the first instance of -# this or PKG_CHECK_MODULES is called, or make sure to call -# PKG_CHECK_EXISTS manually -# -------------------------------------------------------------- -AC_DEFUN([PKG_CHECK_EXISTS], -[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl -if test -n "$PKG_CONFIG" && \ - AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then - m4_ifval([$2], [$2], [:]) -m4_ifvaln([$3], [else - $3])dnl -fi]) - - -# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES]) -# --------------------------------------------- -m4_define([_PKG_CONFIG], -[if test -n "$PKG_CONFIG"; then - if test -n "$$1"; then - pkg_cv_[]$1="$$1" - else - PKG_CHECK_EXISTS([$3], - [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`], - [pkg_failed=yes]) - fi -else - pkg_failed=untried -fi[]dnl -])# _PKG_CONFIG - -# _PKG_SHORT_ERRORS_SUPPORTED -# ----------------------------- -AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], -[AC_REQUIRE([PKG_PROG_PKG_CONFIG]) -if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then - _pkg_short_errors_supported=yes -else - _pkg_short_errors_supported=no -fi[]dnl -])# _PKG_SHORT_ERRORS_SUPPORTED - - -# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], -# [ACTION-IF-NOT-FOUND]) -# -# -# Note that if there is a possibility the first call to -# PKG_CHECK_MODULES might not happen, you should be sure to include an -# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac -# -# -# -------------------------------------------------------------- -AC_DEFUN([PKG_CHECK_MODULES], -[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl -AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl -AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl - -pkg_failed=no -AC_MSG_CHECKING([for $1]) - -_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2]) -_PKG_CONFIG([$1][_LIBS], [libs], [$2]) - -m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS -and $1[]_LIBS to avoid the need to call pkg-config. -See the pkg-config man page for more details.]) - -if test $pkg_failed = yes; then - _PKG_SHORT_ERRORS_SUPPORTED - if test $_pkg_short_errors_supported = yes; then - $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"` - else - $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"` - fi - # Put the nasty error message in config.log where it belongs - echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD - - ifelse([$4], , [AC_MSG_ERROR(dnl -[Package requirements ($2) were not met: - -$$1_PKG_ERRORS - -Consider adjusting the PKG_CONFIG_PATH environment variable if you -installed software in a non-standard prefix. - -_PKG_TEXT -])], - [AC_MSG_RESULT([no]) - $4]) -elif test $pkg_failed = untried; then - ifelse([$4], , [AC_MSG_FAILURE(dnl -[The pkg-config script could not be found or is too old. Make sure it -is in your PATH or set the PKG_CONFIG environment variable to the full -path to pkg-config. - -_PKG_TEXT - -To get pkg-config, see .])], - [$4]) -else - $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS - $1[]_LIBS=$pkg_cv_[]$1[]_LIBS - AC_MSG_RESULT([yes]) - ifelse([$3], , :, [$3]) -fi[]dnl -])# PKG_CHECK_MODULES diff --git a/ExternalLibs/libvorbis-1.3.1/macos/compat/strdup.c b/ExternalLibs/libvorbis-1.3.1/macos/compat/strdup.c deleted file mode 100644 index 294e2d0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macos/compat/strdup.c +++ /dev/null @@ -1,21 +0,0 @@ -#include -#include -#include -#include - -char *strdup(const char *inStr) -{ - char *outStr = NULL; - - if (inStr == NULL) { - return NULL; - } - - outStr = _ogg_malloc(strlen(inStr) + 1); - - if (outStr != NULL) { - strcpy(outStr, inStr); - } - - return outStr; -} diff --git a/ExternalLibs/libvorbis-1.3.1/macos/compat/sys/types.h b/ExternalLibs/libvorbis-1.3.1/macos/compat/sys/types.h deleted file mode 100644 index 4ef7abd..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macos/compat/sys/types.h +++ /dev/null @@ -1 +0,0 @@ -#ifndef __SYS_TYPES_H__ #define __SYS_TYPES_H__ 1 #include #include #include typedef short int16_t; typedef long int32_t; typedef long long int64_t; #define vorbis_size32_t long #if defined(__cplusplus) extern "C" { #endif #pragma options align=power char *strdup(const char *inStr); #pragma options align=reset #if defined(__cplusplus) } #endif #endif /* __SYS_TYPES_H__ */ \ No newline at end of file diff --git a/ExternalLibs/libvorbis-1.3.1/macos/decoder_example.mcp b/ExternalLibs/libvorbis-1.3.1/macos/decoder_example.mcp deleted file mode 100644 index a6c57f7..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/decoder_example.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macos/encoder_example.mcp b/ExternalLibs/libvorbis-1.3.1/macos/encoder_example.mcp deleted file mode 100644 index bb6eb88..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/encoder_example.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp deleted file mode 100644 index f5de195..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp.exp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp.exp deleted file mode 100644 index ec14087..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macos/libvorbis.mcp.exp +++ /dev/null @@ -1,45 +0,0 @@ -### From "vorbis/codec.h" - -# Vorbis PRIMITIVES: general - -vorbis_info_init -vorbis_info_clear -vorbis_info_blocksize -vorbis_comment_init -vorbis_comment_add -vorbis_comment_add_tag -vorbis_comment_query -vorbis_comment_query_count -vorbis_comment_clear - -vorbis_block_init -vorbis_block_clear -vorbis_dsp_clear -vorbis_granule_time - -# Vorbis PRIMITIVES: analysis/DSP layer - -vorbis_analysis_init -vorbis_commentheader_out -vorbis_analysis_headerout -vorbis_analysis_buffer -vorbis_analysis_wrote -vorbis_analysis_blockout -vorbis_analysis -vorbis_bitrate_addblock -vorbis_bitrate_flushpacket - -# Vorbis PRIMITIVES: synthesis layer - -vorbis_synthesis_headerin -vorbis_synthesis_init -vorbis_synthesis_restart -vorbis_synthesis -vorbis_synthesis_trackonly -vorbis_synthesis_blockin -vorbis_synthesis_pcmout -vorbis_synthesis_lapout -vorbis_synthesis_read -vorbis_packet_blocksize -vorbis_synthesis_halfrate -vorbis_synthesis_halfrate_p diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp deleted file mode 100644 index bc61f85..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp.exp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp.exp deleted file mode 100644 index d71a21d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisenc.mcp.exp +++ /dev/null @@ -1,8 +0,0 @@ -### From "vorbis/vorbisenc.h" - -vorbis_encode_init -vorbis_encode_setup_managed -vorbis_encode_setup_vbr -vorbis_encode_init_vbr -vorbis_encode_setup_init -vorbis_encode_ctl diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp deleted file mode 100644 index 17ff6a7..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp.exp b/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp.exp deleted file mode 100644 index 92412f0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macos/libvorbisfile.mcp.exp +++ /dev/null @@ -1,45 +0,0 @@ -### From "vorbis/vorbisfile.h" - -ov_clear -ov_open -ov_open_callbacks - -ov_test -ov_test_callbacks -ov_test_open - -ov_bitrate -ov_bitrate_instant -ov_streams -ov_seekable -ov_serialnumber - -ov_raw_total -ov_pcm_total -ov_time_total - -ov_raw_seek -ov_pcm_seek -ov_pcm_seek_page -ov_time_seek -ov_time_seek_page - -ov_raw_seek_lap -ov_pcm_seek_lap -ov_pcm_seek_page_lap -ov_time_seek_lap -ov_time_seek_page_lap - -ov_raw_tell -ov_pcm_tell -ov_time_tell - -ov_info -ov_comment - -ov_read -ov_read_float - -ov_crosslap -ov_halfrate -ov_halfrate_p \ No newline at end of file diff --git a/ExternalLibs/libvorbis-1.3.1/macos/vorbis.mcp b/ExternalLibs/libvorbis-1.3.1/macos/vorbis.mcp deleted file mode 100644 index 6ce308b..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macos/vorbis.mcp and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macosx/English.lproj/InfoPlist.strings b/ExternalLibs/libvorbis-1.3.1/macosx/English.lproj/InfoPlist.strings deleted file mode 100644 index cfe1b22..0000000 Binary files a/ExternalLibs/libvorbis-1.3.1/macosx/English.lproj/InfoPlist.strings and /dev/null differ diff --git a/ExternalLibs/libvorbis-1.3.1/macosx/Info.plist b/ExternalLibs/libvorbis-1.3.1/macosx/Info.plist deleted file mode 100644 index 63e1b09..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macosx/Info.plist +++ /dev/null @@ -1,30 +0,0 @@ - - - - - CFBundleDevelopmentRegion - English - CFBundleExecutable - Vorbis - CFBundleGetInfoString - Vorbis framework 1.2.3, Copyright © 1994-2009 Xiph.Org Foundation - CFBundleIconFile - - CFBundleIdentifier - org.xiph.vorbis - CFBundleInfoDictionaryVersion - 6.0 - CFBundlePackageType - FMWK - CFBundleShortVersionString - 1.2.3 - CFBundleSignature - ???? - CFBundleVersion - 1.2.3 - NSHumanReadableCopyright - Vorbis framework 1.2.3, Copyright © 1994-2009 Xiph.Org Foundation - CSResourcesFileMapped - - - diff --git a/ExternalLibs/libvorbis-1.3.1/macosx/Vorbis.xcodeproj/project.pbxproj b/ExternalLibs/libvorbis-1.3.1/macosx/Vorbis.xcodeproj/project.pbxproj deleted file mode 100644 index 12f5392..0000000 --- a/ExternalLibs/libvorbis-1.3.1/macosx/Vorbis.xcodeproj/project.pbxproj +++ /dev/null @@ -1,891 +0,0 @@ -// !$*UTF8*$! -{ - archiveVersion = 1; - classes = { - }; - objectVersion = 42; - objects = { - -/* Begin PBXBuildFile section */ - 730F23A3091827B100AB638C /* codec.h in Headers */ = {isa = PBXBuildFile; fileRef = F58520B90191D12B01A802FE /* codec.h */; settings = {ATTRIBUTES = (Public, ); }; }; - 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Check the \`README' file, - it often tells you about the needed prerequisites for installing - this package. You may also peek at any GNU archive site, in case - some other package would contain this missing \`$1' program." - exit 1 - ;; -esac - -exit 0 - -# Local variables: -# eval: (add-hook 'write-file-hooks 'time-stamp) -# time-stamp-start: "scriptversion=" -# time-stamp-format: "%:y-%02m-%02d.%02H" -# time-stamp-end: "$" -# End: diff --git a/ExternalLibs/libvorbis-1.3.1/symbian/bld.inf b/ExternalLibs/libvorbis-1.3.1/symbian/bld.inf deleted file mode 100644 index 341e936..0000000 --- a/ExternalLibs/libvorbis-1.3.1/symbian/bld.inf +++ /dev/null @@ -1,35 +0,0 @@ -/* - Copyright (C) 2003 Commonwealth Scientific and Industrial Research - Organisation (CSIRO) Australia - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - - Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - - Neither the name of CSIRO Australia nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A - PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ORGANISATION OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -PRJ_MMPFILES - -vorbis.mmp diff --git a/ExternalLibs/libvorbis-1.3.1/symbian/config.h b/ExternalLibs/libvorbis-1.3.1/symbian/config.h deleted file mode 100644 index 8fcd196..0000000 --- a/ExternalLibs/libvorbis-1.3.1/symbian/config.h +++ /dev/null @@ -1,54 +0,0 @@ -/* - Copyright (C) 2003 Commonwealth Scientific and Industrial Research - Organisation (CSIRO) Australia - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - - Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - - Neither the name of CSIRO Australia nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A - PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ORGANISATION OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -#ifndef CONFIG_H -#define CONFIG_H - -#ifdef __WINS__ - -/* Disable some warnings */ - -#pragma warning(disable: 4100) /* unreferenced formal parameter */ -#pragma warning(disable: 4127) /* conditional expression is constant */ -#pragma warning(disable: 4189) /* local variable is initialized but not referenced */ -#pragma warning(disable: 4244) /* conversion from '...' to '...', possible loss of data */ -#pragma warning(disable: 4305) /* truncation from '...' to '...' */ -#pragma warning(disable: 4505) /* unreferenced local function has been removed */ -#pragma warning(disable: 4514) /* unreferenced inline function has been removed */ -#pragma warning(disable: 4702) /* unreachable code */ -#pragma warning(disable: 4701) /* local variable may be be used without having been initialized */ -#pragma warning(disable: 4706) /* assignment within conditional expression */ -#pragma warning(disable: 4761) /* integral size mismatch in argument: conversion supplied */ - -#endif - -#endif /* ! CONFIG_H */ diff --git a/ExternalLibs/libvorbis-1.3.1/symbian/vorbis.mmp b/ExternalLibs/libvorbis-1.3.1/symbian/vorbis.mmp deleted file mode 100644 index 4fdeb40..0000000 --- a/ExternalLibs/libvorbis-1.3.1/symbian/vorbis.mmp +++ /dev/null @@ -1,43 +0,0 @@ -/* - Copyright (C) 2003 Commonwealth Scientific and Industrial Research - Organisation (CSIRO) Australia - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - - Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - - Neither the name of CSIRO Australia nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A - PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ORGANISATION OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -TARGET vorbis.lib -TARGETTYPE lib -UID 0 -MACRO HAVE_CONFIG_H -SOURCEPATH ..\lib -SOURCE analysis.c barkmel.c bitrate.c block.c codebook.c envelope.c floor0.c floor1.c info.c -SOURCE lookup.c lpc.c lsp.c mapping0.c mdct.c psy.c registry.c res0.c sharedbook.c -SOURCE smallft.c synthesis.c vorbisfile.c window.c - -USERINCLUDE . ..\include -SYSTEMINCLUDE \epoc32\include \epoc32\include\libc ..\include ..\..\ogg\include ..\..\ogg\symbian diff --git a/ExternalLibs/libvorbis-1.3.1/test/Makefile.am b/ExternalLibs/libvorbis-1.3.1/test/Makefile.am deleted file mode 100644 index 5f7e32a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/test/Makefile.am +++ /dev/null @@ -1,19 +0,0 @@ -## Process this file with automake to produce Makefile.in - 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* * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: vorbis coded test suite using vorbisfile - last mod: $Id: test.c 13293 2007-07-24 00:09:47Z erikd $ - - ********************************************************************/ - -#include -#include -#include - -#include "util.h" -#include "write_read.h" - -#define DATA_LEN 2048 - -#define MAX(a,b) ((a) > (b) ? (a) : (b)) - - -static int check_output (const float * data_in, unsigned len, float allowable); - -int -main(void){ - static float data_out [DATA_LEN] ; - static float data_in [DATA_LEN] ; - - /* Do safest and most used sample rates first. */ - int sample_rates [] = { 44100, 48000, 32000, 22050, 16000, 96000 } ; - unsigned k ; - int errors = 0 ; - int ch; - - gen_windowed_sine (data_out, ARRAY_LEN (data_out), 0.95); - - for(ch=1;ch<=8;ch++){ - float q=-.05; - printf("\nTesting %d channel%s\n\n",ch,ch==1?"":"s"); - while(q<1.){ - for (k = 0 ; k < ARRAY_LEN (sample_rates); k ++) { - char filename [64] ; - snprintf (filename, sizeof (filename), "vorbis_%dch_q%.1f_%u.ogg", ch,q*10,sample_rates [k]); - - printf (" %-20s : ", filename); - fflush (stdout); - - /* Set to know value. */ - set_data_in (data_in, ARRAY_LEN (data_in), 3.141); - - write_vorbis_data_or_die (filename, sample_rates [k], q, data_out, ARRAY_LEN (data_out),ch); - read_vorbis_data_or_die (filename, sample_rates [k], data_in, ARRAY_LEN (data_in)); - - if (check_output (data_in, ARRAY_LEN (data_in), (.15f - .1f*q)) != 0) - errors ++ ; - else { - puts ("ok"); - remove (filename); - } - } - q+=.1; - } - } - - if (errors) - exit (1); - - return 0; -} - -static int -check_output (const float * data_in, unsigned len, float allowable) -{ - float max_abs = 0.0 ; - unsigned k ; - - for (k = 0 ; k < len ; k++) { - float temp = fabs (data_in [k]); - max_abs = MAX (max_abs, temp); - } - - if (max_abs < 0.95-allowable) { - printf ("Error : max_abs (%f) too small.\n", max_abs); - return 1 ; - } else if (max_abs > .95+allowable) { - printf ("Error : max_abs (%f) too big.\n", max_abs); - return 1 ; - } - - return 0 ; -} - diff --git a/ExternalLibs/libvorbis-1.3.1/test/util.c b/ExternalLibs/libvorbis-1.3.1/test/util.c deleted file mode 100644 index a9e1956..0000000 --- a/ExternalLibs/libvorbis-1.3.1/test/util.c +++ /dev/null @@ -1,53 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for vorbis codec test suite. - last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $ - - ********************************************************************/ - -#include -#include -#include -#include -#include - -#include -#include - -#include "util.h" - -void -gen_windowed_sine (float *data, int len, float maximum) -{ int k ; - - memset (data, 0, len * sizeof (float)) ; - - len /= 2 ; - - for (k = 0 ; k < len ; k++) - { data [k] = sin (2.0 * k * M_PI * 1.0 / 32.0 + 0.4) ; - - /* Apply Hanning Window. */ - data [k] *= maximum * (0.5 - 0.5 * cos (2.0 * M_PI * k / ((len) - 1))) ; - } - - return ; -} - -void -set_data_in (float * data, unsigned len, float value) -{ unsigned k ; - - for (k = 0 ; k < len ; k++) - data [k] = value ; -} diff --git a/ExternalLibs/libvorbis-1.3.1/test/util.h b/ExternalLibs/libvorbis-1.3.1/test/util.h deleted file mode 100644 index 2785cde..0000000 --- a/ExternalLibs/libvorbis-1.3.1/test/util.h +++ /dev/null @@ -1,24 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for vorbis codec test suite. - last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $ - - ********************************************************************/ - -#define ARRAY_LEN(x) (sizeof(x)/sizeof(x[0])) - -/* Create simple test data consisting of a windowed sine wave. */ -void gen_windowed_sine (float *data, int len, float maximum) ; - -/* Set len values of data array to given value. */ -void set_data_in (float * data, unsigned len, float value) ; diff --git a/ExternalLibs/libvorbis-1.3.1/test/write_read.c b/ExternalLibs/libvorbis-1.3.1/test/write_read.c deleted file mode 100644 index e177ae4..0000000 --- a/ExternalLibs/libvorbis-1.3.1/test/write_read.c +++ /dev/null @@ -1,298 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for vorbis codec test suite. - last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $ - - ********************************************************************/ - -#include -#include -#include -#include -#include - -#include -#include - -#include "write_read.h" - -/* The following function is basically a hacked version of the code in - * examples/encoder_example.c */ -void -write_vorbis_data_or_die (const char *filename, int srate, float q, const float * data, int count, int ch) -{ - FILE * file ; - ogg_stream_state os; - ogg_page og; - ogg_packet op; - vorbis_info vi; - vorbis_comment vc; - vorbis_dsp_state vd; - vorbis_block vb; - - int eos = 0, ret; - - if ((file = fopen (filename, "wb")) == NULL) { - printf("\n\nError : fopen failed : %s\n", strerror (errno)) ; - exit (1) ; - } - - /********** Encode setup ************/ - - vorbis_info_init (&vi); - - ret = vorbis_encode_init_vbr (&vi,ch,srate,q); - if (ret) { - printf ("vorbis_encode_init_vbr return %d\n", ret) ; - exit (1) ; - } - - vorbis_comment_init (&vc); - vorbis_comment_add_tag (&vc,"ENCODER","test/util.c"); - vorbis_analysis_init (&vd,&vi); - vorbis_block_init (&vd,&vb); - - ogg_stream_init (&os,12345678); - - { - ogg_packet header; - ogg_packet header_comm; - ogg_packet header_code; - - vorbis_analysis_headerout (&vd,&vc,&header,&header_comm,&header_code); - ogg_stream_packetin (&os,&header); - ogg_stream_packetin (&os,&header_comm); - ogg_stream_packetin (&os,&header_code); - - /* Ensures the audio data will start on a new page. */ - while (!eos){ - int result = ogg_stream_flush (&os,&og); - if (result == 0) - break; - fwrite (og.header,1,og.header_len,file); - fwrite (og.body,1,og.body_len,file); - } - - } - - { - /* expose the buffer to submit data */ - float **buffer = vorbis_analysis_buffer (&vd,count); - int i; - - for(i=0;i 0 && read_total < count) { - int bout = samples < count ? samples : count; - bout = read_total + bout > count ? count - read_total : bout; - - memcpy (data + read_total, pcm[0], bout * sizeof (float)) ; - - vorbis_synthesis_read (&vd,bout); - read_total += bout ; - } - } - } - - if (ogg_page_eos (&og)) eos = 1; - } - } - - if (!eos) { - buffer = ogg_sync_buffer (&oy,4096); - bytes = fread (buffer,1,4096,file); - ogg_sync_wrote (&oy,bytes); - if (bytes == 0) eos = 1; - } - } - - ogg_stream_clear (&os); - - vorbis_block_clear (&vb); - vorbis_dsp_clear (&vd); - vorbis_comment_clear (&vc); - vorbis_info_clear (&vi); - } -done_decode: - - /* OK, clean up the framer */ - ogg_sync_clear (&oy); - - fclose (file) ; -} - diff --git a/ExternalLibs/libvorbis-1.3.1/test/write_read.h b/ExternalLibs/libvorbis-1.3.1/test/write_read.h deleted file mode 100644 index 98f5bc6..0000000 --- a/ExternalLibs/libvorbis-1.3.1/test/write_read.h +++ /dev/null @@ -1,28 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for vorbis codec test suite. - last mod: $Id: util.c 13293 2007-07-24 00:09:47Z erikd $ - - ********************************************************************/ - -/* Write supplied data to an Ogg/Vorbis file with specified filename at - * specified sample rate. Assumes a single channel of audio. */ -void write_vorbis_data_or_die (const char *filename, int srate, float q, - const float * data, int count, int ch) ; - -/* Read given Ogg/Vorbis file into data specified data array. This - * function is basically the inverse of the one above. Again, assumes - * a single channel of audio. */ -void read_vorbis_data_or_die (const char *filename, int srate, - float * data, int count) ; - diff --git a/ExternalLibs/libvorbis-1.3.1/todo.txt b/ExternalLibs/libvorbis-1.3.1/todo.txt deleted file mode 100644 index b0e1f93..0000000 --- a/ExternalLibs/libvorbis-1.3.1/todo.txt +++ /dev/null @@ -1,22 +0,0 @@ -Open project list for further development: - -libvorbis: - -Meaningful error code returns - -still some padding at EOS - -Option for brute-forcing vq search on maptype 2 (helps on undertrained -sets). - -encoder switch interface for binary compat through changes; ioctl()-like? - -API changes: - break up some of the more monolithic calls (eg, allow access - to MDCT domain data, additional low level framing capability) - convenience calls for text comments - -other: - -command line suite -'crashme' diff --git a/ExternalLibs/libvorbis-1.3.1/vorbis-uninstalled.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbis-uninstalled.pc.in deleted file mode 100644 index aa70a01..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbis-uninstalled.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# vorbis uninstalled pkg-config file - -prefix= -exec_prefix= -libdir=${pcfiledir}/lib -includedir=${pcfiledir}/include - -Name: vorbis -Description: vorbis is the primary Ogg Vorbis library (uninstalled) -Version: @VERSION@ -Requires: ogg -Conflicts: -Libs: @VORBIS_LIBS@ ${libdir}/libvorbis.la -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vorbis.m4 b/ExternalLibs/libvorbis-1.3.1/vorbis.m4 deleted file mode 100644 index 7b67c58..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbis.m4 +++ /dev/null @@ -1,136 +0,0 @@ -# Configure paths for libvorbis -# Jack Moffitt 10-21-2000 -# Shamelessly stolen from Owen Taylor and Manish Singh -# thomasvs added check for vorbis_bitrate_addblock which is new in rc3 - -dnl XIPH_PATH_VORBIS([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) -dnl Test for libvorbis, and define VORBIS_CFLAGS and VORBIS_LIBS -dnl -AC_DEFUN([XIPH_PATH_VORBIS], -[dnl -dnl Get the cflags and libraries -dnl -AC_ARG_WITH(vorbis,AC_HELP_STRING([--with-vorbis=PFX],[Prefix where libvorbis is installed (optional)]), vorbis_prefix="$withval", vorbis_prefix="") -AC_ARG_WITH(vorbis-libraries,AC_HELP_STRING([--with-vorbis-libraries=DIR],[Directory where libvorbis library is installed (optional)]), vorbis_libraries="$withval", vorbis_libraries="") -AC_ARG_WITH(vorbis-includes,AC_HELP_STRING([--with-vorbis-includes=DIR],[Directory where libvorbis header files are installed (optional)]), vorbis_includes="$withval", vorbis_includes="") -AC_ARG_ENABLE(vorbistest,AC_HELP_STRING([--disable-vorbistest],[Do not try to compile and run a test Vorbis program]),, enable_vorbistest=yes) - - if test "x$vorbis_libraries" != "x" ; then - VORBIS_LIBS="-L$vorbis_libraries" - elif test "x$vorbis_prefix" = "xno" || test "x$vorbis_prefix" = "xyes" ; then - VORBIS_LIBS="" - elif test "x$vorbis_prefix" != "x" ; then - VORBIS_LIBS="-L$vorbis_prefix/lib" - elif test "x$prefix" != "xNONE"; then - VORBIS_LIBS="-L$prefix/lib" - fi - - if test "x$vorbis_prefix" != "xno" ; then - VORBIS_LIBS="$VORBIS_LIBS -lvorbis -lm" - fi - VORBISFILE_LIBS="-lvorbisfile" - VORBISENC_LIBS="-lvorbisenc" - - if test "x$vorbis_includes" != "x" ; then - VORBIS_CFLAGS="-I$vorbis_includes" - elif test "x$vorbis_prefix" = "xno" || test "x$vorbis_prefix" = "xyes" ; then - VORBIS_CFLAGS="" - elif test "x$vorbis_prefix" != "x" ; then - VORBIS_CFLAGS="-I$vorbis_prefix/include" - elif test "x$prefix" != "xNONE"; then - VORBIS_CFLAGS="-I$prefix/include" - fi - - - AC_MSG_CHECKING(for Vorbis) - if test "x$vorbis_prefix" = "xno" ; then - no_vorbis="disabled" - enable_vorbistest="no" - else - no_vorbis="" - fi - - - if test "x$enable_vorbistest" = "xyes" ; then - ac_save_CFLAGS="$CFLAGS" - ac_save_LIBS="$LIBS" - CFLAGS="$CFLAGS $VORBIS_CFLAGS $OGG_CFLAGS" - LIBS="$LIBS $VORBIS_LIBS $VORBISENC_LIBS $OGG_LIBS" -dnl -dnl Now check if the installed Vorbis is sufficiently new. -dnl - rm -f conf.vorbistest - AC_TRY_RUN([ -#include -#include -#include -#include -#include - -int main () -{ - vorbis_block vb; - vorbis_dsp_state vd; - vorbis_info vi; - - vorbis_info_init (&vi); - vorbis_encode_init (&vi, 2, 44100, -1, 128000, -1); - vorbis_analysis_init (&vd, &vi); - vorbis_block_init (&vd, &vb); - /* this function was added in 1.0rc3, so this is what we're testing for */ - vorbis_bitrate_addblock (&vb); - - system("touch conf.vorbistest"); - return 0; -} - -],, no_vorbis=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - - if test "x$no_vorbis" = "xdisabled" ; then - AC_MSG_RESULT(no) - ifelse([$2], , :, [$2]) - elif test "x$no_vorbis" = "x" ; then - AC_MSG_RESULT(yes) - ifelse([$1], , :, [$1]) - else - AC_MSG_RESULT(no) - if test -f conf.vorbistest ; then - : - else - echo "*** Could not run Vorbis test program, checking why..." - CFLAGS="$CFLAGS $VORBIS_CFLAGS" - LIBS="$LIBS $VORBIS_LIBS $OGG_LIBS" - AC_TRY_LINK([ -#include -#include -], [ return 0; ], - [ echo "*** The test program compiled, but did not run. This usually means" - echo "*** that the run-time linker is not finding Vorbis or finding the wrong" - echo "*** version of Vorbis. If it is not finding Vorbis, you'll need to set your" - echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point" - echo "*** to the installed location Also, make sure you have run ldconfig if that" - echo "*** is required on your system" - echo "***" - echo "*** If you have an old version installed, it is best to remove it, although" - echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"], - [ echo "*** The test program failed to compile or link. See the file config.log for the" - echo "*** exact error that occured. This usually means Vorbis was incorrectly installed" - echo "*** or that you have moved Vorbis since it was installed." ]) - CFLAGS="$ac_save_CFLAGS" - LIBS="$ac_save_LIBS" - fi - VORBIS_CFLAGS="" - VORBIS_LIBS="" - VORBISFILE_LIBS="" - VORBISENC_LIBS="" - ifelse([$2], , :, [$2]) - fi - AC_SUBST(VORBIS_CFLAGS) - AC_SUBST(VORBIS_LIBS) - AC_SUBST(VORBISFILE_LIBS) - AC_SUBST(VORBISENC_LIBS) - rm -f conf.vorbistest -]) diff --git a/ExternalLibs/libvorbis-1.3.1/vorbis.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbis.pc.in deleted file mode 100644 index 259abe7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbis.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# libvorbis pkg-config source file - -prefix=@prefix@ -exec_prefix=@exec_prefix@ -libdir=@libdir@ -includedir=@includedir@ - -Name: vorbis -Description: vorbis is the primary Ogg Vorbis library -Version: @VERSION@ -Requires: ogg -Conflicts: -Libs: -L${libdir} -lvorbis -lm -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vorbisenc-uninstalled.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbisenc-uninstalled.pc.in deleted file mode 100644 index 4667d9c..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbisenc-uninstalled.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# vorbisenc uninstalled pkg-config file - -prefix= -exec_prefix= -libdir=${pcfiledir}/lib -includedir=${pcfiledir}/include - -Name: vorbisenc -Description: vorbisenc is a library that provides a convenient API for setting up an encoding environment using libvorbis (uninstalled) -Version: @VERSION@ -Requires: vorbis -Conflicts: -Libs: ${libdir}/libvorbisenc.la -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vorbisenc.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbisenc.pc.in deleted file mode 100644 index 1d90095..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbisenc.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# libvorbisenc pkg-config source file - -prefix=@prefix@ -exec_prefix=@exec_prefix@ -libdir=@libdir@ -includedir=@includedir@ - -Name: vorbisenc -Description: vorbisenc is a library that provides a convenient API for setting up an encoding environment using libvorbis -Version: @VERSION@ -Requires: vorbis -Conflicts: -Libs: -L${libdir} -lvorbisenc -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vorbisfile-uninstalled.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbisfile-uninstalled.pc.in deleted file mode 100644 index 2e7e96d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbisfile-uninstalled.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# vorbisfile uninstalled pkg-config file - -prefix= -exec_prefix= -libdir=${pcfiledir}/lib -includedir=${pcfiledir}/include - -Name: vorbisfile -Description: vorbisfile is a library that provides a convenient high-level API for decoding and basic manipulation of all Vorbis I audio streams (uninstalled) -Version: @VERSION@ -Requires: vorbis -Conflicts: -Libs: ${libdir}/libvorbisfile.la -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vorbisfile.pc.in b/ExternalLibs/libvorbis-1.3.1/vorbisfile.pc.in deleted file mode 100644 index b4387f2..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vorbisfile.pc.in +++ /dev/null @@ -1,14 +0,0 @@ -# libvorbisfile pkg-config source file - -prefix=@prefix@ -exec_prefix=@exec_prefix@ -libdir=@libdir@ -includedir=@includedir@ - -Name: vorbisfile -Description: vorbisfile is a library that provides a convenient high-level API for decoding and basic manipulation of all Vorbis I audio streams -Version: @VERSION@ -Requires: vorbis -Conflicts: -Libs: -L${libdir} -lvorbisfile -Cflags: -I${includedir} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/16.vqs b/ExternalLibs/libvorbis-1.3.1/vq/16.vqs deleted file mode 100644 index 3d15f40..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/16.vqs +++ /dev/null @@ -1,74 +0,0 @@ - -GO - ->_16c0_s noninterleaved -haux 16c0_s/resaux_0.vqd _16c0_s_single 0,64,2 10 - -:_p1_0 16c0_s/res_sub0_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 16c0_s/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 16c0_s/res_sub0_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 16c0_s/res_sub0_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 16c0_s/res_sub0_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 16c0_s/res_sub0_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 16c0_s/res_sub0_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 16c0_s/res_sub0_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 16c0_s/res_sub0_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 16c0_s/res_sub0_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 16c0_s/res_sub0_part9_pass0.vqd, 4, nonseq, 0 +- 315 -:_p9_1 16c0_s/res_sub0_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p9_2 16c0_s/res_sub0_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 - ->_16c1s_s noninterleaved -haux 16c1_s/resaux_0.vqd _16c1_s_short 0,64,2 10 - ->_16c1_s noninterleaved -haux 16c1_s/resaux_1.vqd _16c1_s_long 0,64,2 10 - -:_p1_0 16c1_s/res_sub0_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 16c1_s/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 16c1_s/res_sub0_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 16c1_s/res_sub0_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 16c1_s/res_sub0_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 16c1_s/res_sub0_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 16c1_s/res_sub0_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 16c1_s/res_sub0_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 16c1_s/res_sub0_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 16c1_s/res_sub0_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 16c1_s/res_sub0_part9_pass0.vqd, 2, nonseq, 0 +- 315 630 945 1260 1575 1890 -:_p9_1 16c1_s/res_sub0_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p9_2 16c1_s/res_sub0_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 - ->_16c2s_s noninterleaved -haux 16c2_s/resaux_0.vqd _16c2_s_short 0,64,2 10 ->_16c2_s noninterleaved -haux 16c2_s/resaux_1.vqd _16c2_s_long 0,64,2 10 - -:_p1_0 16c2_s/res_sub0_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 16c2_s/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 16c2_s/res_sub0_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 16c2_s/res_sub0_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 16c2_s/res_sub0_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 16c2_s/res_sub0_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 16c2_s/res_sub0_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 16c2_s/res_sub0_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 16c2_s/res_sub0_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 16c2_s/res_sub0_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 16c2_s/res_sub0_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 16c2_s/res_sub0_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 16c2_s/res_sub0_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 4655 5586 6517 7448 -:_p9_1 16c2_s/res_sub0_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 16c2_s/res_sub0_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/16u.vqs b/ExternalLibs/libvorbis-1.3.1/vq/16u.vqs deleted file mode 100644 index 854de98..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/16u.vqs +++ /dev/null @@ -1,69 +0,0 @@ - -GO - ->_16u0_ noninterleaved -haux 16u0/resaux_0.vqd _16u0__single 0,64,2 8 - -:_p1_0 16u0/res_sub0_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 16u0/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 16u0/res_sub0_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 16u0/res_sub0_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 16u0/res_sub0_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 16u0/res_sub0_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 16u0/res_sub0_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 16u0/res_sub0_part7_pass0.vqd, 4, nonseq, 0 +- 315 -:_p7_1 16u0/res_sub0_part7_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p7_2 16u0/res_sub0_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 - - ->_16u1s_ noninterleaved -haux 16u1/resaux_0.vqd _16u1__short 0,64,2 10 ->_16u1_ noninterleaved -haux 16u1/resaux_1.vqd _16u1__long 0,64,2 10 - -:_p1_0 16u1/res_sub0_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 16u1/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 16u1/res_sub0_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 16u1/res_sub0_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 16u1/res_sub0_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 16u1/res_sub0_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p7_0 16u1/res_sub0_part7_pass0.vqd, 4, nonseq, 0 +- 11 -:_p7_1 16u1/res_sub0_part7_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p8_0 16u1/res_sub0_part8_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 -:_p8_1 16u1/res_sub0_part8_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p9_0 16u1/res_sub0_part9_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 1275 1530 1785 -:_p9_1 16u1/res_sub0_part9_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p9_2 16u1/res_sub0_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - ->_16u2s noninterleaved -haux 16u2/resaux_0.vqd _16u2__short 0,16,2 10 - ->_16u2 noninterleaved -haux 16u2/resaux_1.vqd _16u2__long 0,64,2 10 - -:_p1_0 16u2/res_sub0_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 16u2/res_sub0_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 16u2/res_sub0_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 16u2/res_sub0_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 16u2/res_sub0_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 16u2/res_sub0_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 16u2/res_sub0_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 16u2/res_sub0_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 16u2/res_sub0_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 16u2/res_sub0_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 16u2/res_sub0_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 16u2/res_sub0_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 16u2/res_sub0_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 4655 5586 6517 -:_p9_1 16u2/res_sub0_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 16u2/res_sub0_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c-1.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c-1.vqs deleted file mode 100644 index ff30d65..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c-1.vqs +++ /dev/null @@ -1,63 +0,0 @@ -GO - ->_44cn1s_s noninterleaved -haux 44c-1_s/resaux_0.vqd _44cn1_s_short 0,16,2 9 - ->_44cn1_s noninterleaved -haux 44c-1_s/resaux_1.vqd _44cn1_s_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c-1_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c-1_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c-1_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c-1_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c-1_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p6_0 44c-1_s/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c-1_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c-1_s/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c-1_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c-1_s/res_part8_pass0.vqd, 4, nonseq, 0 +- 221 442 -:_p8_1 44c-1_s/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c-1_s/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - - ->_44cn1s_sm noninterleaved -haux 44c-1_sm/resaux_0.vqd _44cn1_sm_short 0,16,2 9 - ->_44cn1_sm noninterleaved -haux 44c-1_sm/resaux_1.vqd _44cn1_sm_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c-1_sm/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c-1_sm/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c-1_sm/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c-1_sm/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c-1_sm/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p6_0 44c-1_sm/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c-1_sm/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c-1_sm/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c-1_sm/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c-1_sm/res_part8_pass0.vqd, 2, nonseq, 0 +- 221 442 663 884 -:_p8_1 44c-1_sm/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c-1_sm/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c0.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c0.vqs deleted file mode 100644 index f650f8f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c0.vqs +++ /dev/null @@ -1,65 +0,0 @@ -GO - ->_44c0s_s noninterleaved -haux 44c0_s/resaux_0.vqd _44c0_s_short 0,16,2 9 - ->_44c0_s noninterleaved -haux 44c0_s/resaux_1.vqd _44c0_s_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c0_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c0_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c0_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c0_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c0_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p6_0 44c0_s/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c0_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c0_s/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c0_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c0_s/res_part8_pass0.vqd, 4, nonseq, 0 +- 221 442 -:_p8_1 44c0_s/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c0_s/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - - ->_44c0s_sm noninterleaved -haux 44c0_sm/resaux_0.vqd _44c0_sm_short 0,16,2 9 - ->_44c0_sm noninterleaved -haux 44c0_sm/resaux_1.vqd _44c0_sm_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c0_sm/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c0_sm/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c0_sm/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c0_sm/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c0_sm/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p6_0 44c0_sm/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c0_sm/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c0_sm/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c0_sm/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c0_sm/res_part8_pass0.vqd, 2, nonseq, 0 +- 221 442 663 884 -:_p8_1 44c0_sm/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c0_sm/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c1.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c1.vqs deleted file mode 100644 index c21a6b3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c1.vqs +++ /dev/null @@ -1,66 +0,0 @@ - -GO - ->_44c1s_s noninterleaved -haux 44c1_s/resaux_0.vqd _44c1_s_short 0,16,2 9 - ->_44c1_s noninterleaved -haux 44c1_s/resaux_1.vqd _44c1_s_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c1_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c1_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c1_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c1_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c1_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p6_0 44c1_s/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c1_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c1_s/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c1_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c1_s/res_part8_pass0.vqd, 2, nonseq, 0 +- 221 442 663 884 1105 1326 -:_p8_1 44c1_s/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c1_s/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - - ->_44c1s_sm noninterleaved -haux 44c1_sm/resaux_0.vqd _44c1_sm_short 0,16,2 9 - ->_44c1_sm noninterleaved -haux 44c1_sm/resaux_1.vqd _44c1_sm_long 0,64,2 9 - -# 0 1 2 2 4 8 16 32 + -# 0 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 -# 1 . . . -# 2 . . . -# 4 . . . . . . - -:_p1_0 44c1_sm/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c1_sm/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c1_sm/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c1_sm/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c1_sm/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p6_0 44c1_sm/res_part6_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p6_1 44c1_sm/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p7_0 44c1_sm/res_part7_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p7_1 44c1_sm/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p8_0 44c1_sm/res_part8_pass0.vqd, 2, nonseq, 0 +- 221 442 663 884 1105 1326 -:_p8_1 44c1_sm/res_part8_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p8_2 44c1_sm/res_part8_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c2.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c2.vqs deleted file mode 100644 index 9fdbd03..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c2.vqs +++ /dev/null @@ -1,37 +0,0 @@ -GO - ->_44c2s_s noninterleaved -haux 44c2_s/resaux_0.vqd _44c2_s_short 0,16,2 10 - ->_44c2_s noninterleaved -haux 44c2_s/resaux_1.vqd _44c2_s_long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 8 16 32 + -# 0 99 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44c2_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c2_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c2_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44c2_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c2_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44c2_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 44c2_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 44c2_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c2_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 44c2_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 44c2_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 221 442 663 884 1105 1326 -:_p9_1 44c2_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 -:_p9_2 44c2_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 - - \ No newline at end of file diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c3.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c3.vqs deleted file mode 100644 index 57a1317..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c3.vqs +++ /dev/null @@ -1,36 +0,0 @@ - -GO - ->_44c3s_s noninterleaved -haux 44c3_s/resaux_0.vqd _44c3_s_short 0,16,2 10 - ->_44c3_s noninterleaved -haux 44c3_s/resaux_1.vqd _44c3_s_long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 8 16 32 + -# 0 99 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44c3_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c3_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c3_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44c3_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c3_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44c3_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 44c3_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 44c3_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c3_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 44c3_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 44c3_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 1275 1530 -:_p9_1 44c3_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p9_2 44c3_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c4.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c4.vqs deleted file mode 100644 index 82a36e1..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c4.vqs +++ /dev/null @@ -1,36 +0,0 @@ - -GO - ->_44c4s_s noninterleaved -haux 44c4_s/resaux_0.vqd _44c4_s_short 0,16,2 10 - ->_44c4_s noninterleaved -haux 44c4_s/resaux_1.vqd _44c4_s_long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 8 16 32 + -# 0 99 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44c4_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c4_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c4_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44c4_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c4_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44c4_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 44c4_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 44c4_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c4_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 44c4_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 44c4_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 315 630 945 1260 1575 1890 -:_p9_1 44c4_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p9_2 44c4_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c5.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c5.vqs deleted file mode 100644 index 9790843..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c5.vqs +++ /dev/null @@ -1,37 +0,0 @@ - -GO - ->_44c5s_s noninterleaved -haux 44c5_s/resaux_0.vqd _44c5_s_short 0,16,2 10 - ->_44c5_s noninterleaved -haux 44c5_s/resaux_1.vqd _44c5_s_long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 8 16 32 + -# 0 99 0 99 4 8 16 32 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44c5_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 44c5_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c5_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44c5_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 44c5_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44c5_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 44c5_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 44c5_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c5_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 44c5_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 44c5_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 357 714 1071 1428 1785 2142 2499 -:_p9_1 44c5_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 168 -:_p9_2 44c5_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c6.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c6.vqs deleted file mode 100644 index f420dd0..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c6.vqs +++ /dev/null @@ -1,37 +0,0 @@ -GO - ->_44c6s_s noninterleaved -haux 44c6_s/resaux_0.vqd _44c6_s_short 0,16,2 10 - ->_44c6_s noninterleaved -haux 44c6_s/resaux_1.vqd _44c6_s_long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 1 2 3 4 8 16 71 157 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44c6_s/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44c6_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c6_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c6_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44c6_s/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44c6_s/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44c6_s/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44c6_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44c6_s/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44c6_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c6_s/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44c6_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44c6_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 637 1274 1911 2548 3185 3822 -:_p9_1 44c6_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 -:_p9_2 44c6_s/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c7.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c7.vqs deleted file mode 100644 index 088d81d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c7.vqs +++ /dev/null @@ -1,38 +0,0 @@ - -GO - ->_44c7s_s noninterleaved -haux 44c7_s/resaux_0.vqd _44c7_s_short 0,16,2 10 - ->_44c7_s noninterleaved -haux 44c7_s/resaux_1.vqd _44c7_s_long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 1 2 3 4 8 16 71 157 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44c7_s/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44c7_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c7_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c7_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44c7_s/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44c7_s/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44c7_s/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44c7_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44c7_s/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44c7_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c7_s/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44c7_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44c7_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 637 1274 1911 2548 3185 3822 -:_p9_1 44c7_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 -:_p9_2 44c7_s/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c8.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c8.vqs deleted file mode 100644 index ce5bdbe..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c8.vqs +++ /dev/null @@ -1,39 +0,0 @@ - -GO - ->_44c8s_s noninterleaved -haux 44c8_s/resaux_0.vqd _44c8_s_short 0,16,2 10 - ->_44c8_s noninterleaved -haux44c8_s/resaux_1.vqd _44c8_s_long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 1 2 3 4 8 16 71 157 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44c8_s/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44c8_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c8_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c8_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44c8_s/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44c8_s/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44c8_s/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44c8_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44c8_s/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44c8_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c8_s/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44c8_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44c8_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 4655 5586 6517 7448 -:_p9_1 44c8_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 44c8_s/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44c9.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44c9.vqs deleted file mode 100644 index 1c54786..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44c9.vqs +++ /dev/null @@ -1,37 +0,0 @@ -GO - ->_44c9s_s noninterleaved -haux 44c9_s/resaux_0.vqd _44c9_s_short 0,16,2 10 - ->_44c9_s noninterleaved -haux 44c9_s/resaux_1.vqd _44c9_s_long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 1 2 3 4 8 16 71 157 + - -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44c9_s/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44c9_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44c9_s/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44c9_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44c9_s/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44c9_s/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44c9_s/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44c9_s/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44c9_s/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44c9_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44c9_s/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44c9_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44c9_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 4655 5586 6517 7448 8379 -:_p9_1 44c9_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 44c9_s/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p-1.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p-1.vqs deleted file mode 100644 index 02d26fb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p-1.vqs +++ /dev/null @@ -1,49 +0,0 @@ -GO - ->_44pn1 noninterleaved -haux 44pn1/resaux_0.vqd _44pn1_short 0,80,2 7 -haux 44pn1/resaux_1.vqd _44pn1_long 0,300,2 7 -haux 44pn1/resaux_2.vqd _44pn1_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 7 17 31 + -# 0 99 7 17 31 + - -# 0 1 2 3 4 5 6 -# 1 . . . . . -# 2 . . . . . . -# 4 . . - -:_p1_0 44pn1/res_sub0_part1_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p2_0 44pn1/res_sub0_part2_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p2_1 44pn1/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p3_0 44pn1/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p3_1 44pn1/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p4_0 44pn1/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p4_1 44pn1/res_sub0_part4_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p5_0 44pn1/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p5_1 44pn1/res_sub0_part5_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p4_1 :_p5_2 - -:_p6_0 44pn1/res_sub0_part6_pass0.vqd, 5, nonseq, 0 +- 625 -:_p6_1 44pn1/res_sub0_part6_pass1.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p6_2 44pn1/res_sub0_part6_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44pn1/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44pn1/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44pn1/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p0.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p0.vqs deleted file mode 100644 index 16479ba..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p0.vqs +++ /dev/null @@ -1,49 +0,0 @@ -GO - ->_44p0 noninterleaved -haux 44p0/resaux_0.vqd _44p0_short 0,42,2 7 -haux 44p0/resaux_1.vqd _44p0_long 0,170,2 7 -haux 44p0/resaux_2.vqd _44p0_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 7 17 31 + -# 0 99 7 17 31 + - -# 0 1 2 3 4 5 6 -# 1 . . . . . -# 2 . . . . . . -# 4 . . - -:_p1_0 44p0/res_sub0_part1_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p2_0 44p0/res_sub0_part2_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p2_1 44p0/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p3_0 44p0/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p3_1 44p0/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p4_0 44p0/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p4_1 44p0/res_sub0_part4_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p5_0 44p0/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p5_1 44p0/res_sub0_part5_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p4_1 :_p5_2 - -:_p6_0 44p0/res_sub0_part6_pass0.vqd, 5, nonseq, 0 +- 625 -:_p6_1 44p0/res_sub0_part6_pass1.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p6_2 44p0/res_sub0_part6_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p0/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p0/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p0/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p1.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p1.vqs deleted file mode 100644 index 74352c3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p1.vqs +++ /dev/null @@ -1,49 +0,0 @@ -GO - ->_44p1 noninterleaved -haux 44p1/resaux_0.vqd _44p1_short 0,42,2 7 -haux 44p1/resaux_1.vqd _44p1_long 0,170,2 7 -haux 44p1/resaux_2.vqd _44p1_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 7 17 31 + -# 0 99 7 17 31 + - -# 0 1 2 3 4 5 6 -# 1 . . . . . -# 2 . . . . . . -# 4 . . - -:_p1_0 44p1/res_sub0_part1_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p2_0 44p1/res_sub0_part2_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p2_1 44p1/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p3_0 44p1/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p3_1 44p1/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p4_0 44p1/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p4_1 44p1/res_sub0_part4_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p5_0 44p1/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p5_1 44p1/res_sub0_part5_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p4_1 :_p5_2 - -:_p6_0 44p1/res_sub0_part6_pass0.vqd, 5, nonseq, 0 +- 625 -:_p6_1 44p1/res_sub0_part6_pass1.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p6_2 44p1/res_sub0_part6_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p1/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p1/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p1/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p2.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p2.vqs deleted file mode 100644 index 7eabbab..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p2.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p2 noninterleaved -haux 44p2/resaux_0.vqd _44p2_short 0,42,2 8 -haux 44p2/resaux_1.vqd _44p2_long 0,170,2 8 -haux 44p2/resaux_2.vqd _44p2_lfe 0,2,2 2 - -#iter 0 - -# 0 1 1 2 7 17 31 + -# 0 99 99 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p2/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p2/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p2/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p2/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p2/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p2/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p2/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p2/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p2/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p2/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 - -:_p7_0 44p2/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p2/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p2/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p2/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p2/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p2/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p2/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p3.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p3.vqs deleted file mode 100644 index b1c66a6..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p3.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p3 noninterleaved -haux 44p3/resaux_0.vqd _44p3_short 0,42,2 8 -haux 44p3/resaux_1.vqd _44p3_long 0,170,2 8 -haux 44p3/resaux_2.vqd _44p3_lfe 0,2,2 2 - -#iter 0 - -# 0 1 1 2 7 17 31 + -# 0 99 99 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p3/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p3/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p3/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p3/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p3/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p3/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p3/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p3/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p3/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p3/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p3/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p3/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p3/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p3/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p3/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p3/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p3/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p4.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p4.vqs deleted file mode 100644 index 4b70436..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p4.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p4 noninterleaved -haux 44p4/resaux_0.vqd _44p4_short 0,42,2 8 -haux 44p4/resaux_1.vqd _44p4_long 0,170,2 8 -haux 44p4/resaux_2.vqd _44p4_lfe 0,2,2 2 - -#iter 0 - -# 0 1 1 2 7 17 31 + -# 0 99 99 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p4/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p4/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p4/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p4/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p4/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p4/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p4/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p4/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p4/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p4/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p4/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p4/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p4/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p4/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p4/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p4/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p4/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p7_2/3 for l1_1/2 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p5.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p5.vqs deleted file mode 100644 index 0372321..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p5.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p5 noninterleaved -haux 44p5/resaux_0.vqd _44p5_short 0,42,2 8 -haux 44p5/resaux_1.vqd _44p5_long 0,170,2 8 -haux 44p5/resaux_2.vqd _44p5_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 4 7 17 31 + -# 1 2 4 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p5/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p5/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p5/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p5/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p5/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p5/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p5/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p5/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p5/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p5/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p5/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p5/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p5/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p5/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p5/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p5/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p5/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p6_2/3 for l1_2/3 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p6.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p6.vqs deleted file mode 100644 index 9daad60..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p6.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p6 noninterleaved -haux 44p6/resaux_0.vqd _44p6_short 0,42,2 8 -haux 44p6/resaux_1.vqd _44p6_long 0,170,2 8 -haux 44p6/resaux_2.vqd _44p6_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 4 7 17 31 + -# 1 2 4 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p6/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p6/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p6/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p6/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p6/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p6/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p6/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p6/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p6/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p6/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p6/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p6/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p6/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p6/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p6/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p6/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p6/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 -# reuse p6_2/3 for l1_2/3 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p7.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p7.vqs deleted file mode 100644 index 9ec5d02..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p7.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p7 noninterleaved -haux 44p7/resaux_0.vqd _44p7_short 0,42,2 8 -haux 44p7/resaux_1.vqd _44p7_long 0,170,2 8 -haux 44p7/resaux_2.vqd _44p7_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 4 7 17 31 + -# 1 2 4 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p7/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p7/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p7/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p7/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p7/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p7/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p7/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p7/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p7/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p7/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p7/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 1875 -:_p7_1 44p7/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 -:_p7_2 44p7/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p7/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p7/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p7/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p7/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 1350 -# reuse p6_2/3 for l1_2/3 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p8.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p8.vqs deleted file mode 100644 index a75af84..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p8.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p8 noninterleaved -haux 44p8/resaux_0.vqd _44p8_short 0,42,2 8 -haux 44p8/resaux_1.vqd _44p8_long 0,170,2 8 -haux 44p8/resaux_2.vqd _44p8_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 4 7 17 31 + -# 1 2 4 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p8/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p8/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p8/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p8/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p8/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p8/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p8/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p8/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p8/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p8/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p8/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 3125 -:_p7_1 44p8/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 1250 -:_p7_2 44p8/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p8/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p8/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p8/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p8/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 1350 -# reuse p6_2/3 for l1_2/3 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44p9.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44p9.vqs deleted file mode 100644 index 4c00780..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44p9.vqs +++ /dev/null @@ -1,52 +0,0 @@ -GO - ->_44p9 noninterleaved -haux 4pp9/resaux_0.vqd _44p9_short 0,42,2 8 -haux 4pp9/resaux_1.vqd _44p9_long 0,170,2 8 -haux 4pp9/resaux_2.vqd _44p9_lfe 0,2,2 2 - -#iter 0 - -# 0 1 2 4 7 17 31 + -# 1 2 4 7 17 31 + - -# 0 1 2 3 4 5 6 7 -# 1 . . . . . -# 2 . . . . . . -# 4 . . . -# 8 . - -:_p1_0 44p9/res_sub0_part1_pass2.vqd, 5, nonseq cull, 0 +- 1 -:_p2_0 44p9/res_sub0_part2_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p3_0 44p9/res_sub0_part3_pass0.vqd, 5, nonseq cull, 0 +- 3 -:_p3_1 44p9/res_sub0_part3_pass1.vqd, 5, nonseq cull, 0 +- 1 - -:_p4_0 44p9/res_sub0_part4_pass0.vqd, 5, nonseq cull, 0 +- 5 -:_p4_1 44p9/res_sub0_part4_pass1.vqd, 5, nonseq cull, 0 +- 1 2 - -:_p5_0 44p9/res_sub0_part5_pass0.vqd, 5, nonseq cull, 0 +- 7 14 -:_p5_1 44p9/res_sub0_part5_pass1.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p6_0 44p9/res_sub0_part6_pass0.vqd, 5, nonseq cull, 0 +- 21 -:_p6_1 44p9/res_sub0_part6_pass1.vqd, 5, nonseq cull, 0 +- 7 -# reuse p5_1 :_p6_2 44p3/res_sub0_part6_pass2.vqd, 1, nonseq cull, 0 +- 1 2 3 - -:_p7_0 44p9/res_sub0_part7_pass0.vqd, 5, nonseq, 0 +- 3125 6250 -:_p7_1 44p9/res_sub0_part7_pass1.vqd, 5, nonseq, 0 +- 625 1250 -:_p7_2 44p9/res_sub0_part7_pass2.vqd, 1, nonseq, 0 +- 25 50 75 100 125 150 175 200 225 250 275 300 -:_p7_3 44p9/res_sub0_part7_pass3.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 - -# 32 + -# 0 0 -# -# 0 1 -# 1 . . -# 2 . . -# 4 . - -:_l0_0 44p9/res_sub1_part0_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_l0_1 44p9/res_sub1_part0_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_l1_0 44p9/res_sub1_part1_pass0.vqd, 2, nonseq, 0 +- 625 1250 -# reuse p6_2/3 for l1_2/3 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u0.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u0.vqs deleted file mode 100644 index 5bc3f60..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u0.vqs +++ /dev/null @@ -1,33 +0,0 @@ -GO - ->_44u0_ noninterleaved -haux 44u0/resaux_0.vqd _44u0__short 0,16,2 8 - ->_44u0_ noninterleaved -haux 44u0/resaux_1.vqd _44u0__long 0,64,2 8 - -#iter 0 - - - -# 0 1 1 2 2 4 32 + -# 25 0 45 0 0 0 0 -# -# 0 1 2 3 4 5 6 7 -# 1 . . -# 2 . . -# 4 . . . . . . - -:_p1_0 44u0/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u0/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u0/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u0/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u0/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 44u0/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u0/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u0/res_part7_pass0.vqd, 4, nonseq, 0 +- 169 338 -:_p7_1 44u0/res_part7_pass1.vqd, 2, nonseq, 0 +- 13 26 39 52 65 78 -:_p7_2 44u0/res_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u1.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u1.vqs deleted file mode 100644 index ed19dc6..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u1.vqs +++ /dev/null @@ -1,33 +0,0 @@ -GO - ->_44u1_ noninterleaved -haux 44u1/resaux_0.vqd _44u1__short 0,16,2 8 - ->_44u1_ noninterleaved -haux 44u1/resaux_1.vqd _44u1__long 0,64,2 8 - -#iter 0 - - - -# 0 1 1 2 2 4 32 + -# 25 0 45 0 0 0 0 -# -# 0 1 2 3 4 5 6 7 -# 1 . . -# 2 . . -# 4 . . . . . . - -:_p1_0 44u1/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u1/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u1/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u1/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u1/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 44u1/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u1/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u1/res_part7_pass0.vqd, 2, nonseq, 0 +- 169 338 507 -:_p7_1 44u1/res_part7_pass1.vqd, 2, nonseq, 0 +- 13 26 39 52 65 78 -:_p7_2 44u1/res_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u2.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u2.vqs deleted file mode 100644 index 314461e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u2.vqs +++ /dev/null @@ -1,32 +0,0 @@ -GO - ->_44u2_ noninterleaved -haux 44u2/resaux_0.vqd _44u2__short 0,16,2 8 - ->_44u2_ noninterleaved -haux 44u2/resaux_1.vqd _44u2__long 0,64,2 8 - -#iter 0 - - - -# 0 1 1 2 2 4 32 + -# 25 0 45 0 0 0 0 -# -# 0 1 2 3 4 5 6 7 -# 1 . . -# 2 . . -# 4 . . . . . . - -:_p1_0 44u2/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u2/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u2/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u2/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u2/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 44u2/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u2/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u2/res_part7_pass0.vqd, 2, nonseq, 0 +- 169 338 507 676 -:_p7_1 44u2/res_part7_pass1.vqd, 2, nonseq, 0 +- 13 26 39 52 65 78 -:_p7_2 44u2/res_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u3.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u3.vqs deleted file mode 100644 index c882109..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u3.vqs +++ /dev/null @@ -1,33 +0,0 @@ - -GO - ->_44u3_ noninterleaved -haux 44u3/resaux_0.vqd _44u3__short 0,16,2 8 - ->_44u3_ noninterleaved -haux 44u3/resaux_1.vqd _44u3__long 0,64,2 8 - -#iter 0 - - - -# 0 1 1 2 2 4 32 + -# 25 0 45 0 0 0 0 -# -# 0 1 2 3 4 5 6 7 -# 1 . . -# 2 . . -# 4 . . . . . . - -:_p1_0 44u3/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u3/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u3/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u3/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u3/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 44u3/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u3/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u3/res_part7_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 -:_p7_1 44u3/res_part7_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p7_2 44u3/res_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u4.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u4.vqs deleted file mode 100644 index cb4d9ba..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u4.vqs +++ /dev/null @@ -1,33 +0,0 @@ - -GO - ->_44u4_ noninterleaved -haux 44u4/resaux_0.vqd _44u4__short 0,16,2 8 - ->_44u4_ noninterleaved -haux 44u4/resaux_1.vqd _44u4__long 0,64,2 8 - -#iter 0 - - - -# 0 1 1 2 2 4 32 + -# 25 0 45 0 0 0 0 -# -# 0 1 2 3 4 5 6 7 -# 1 . . -# 2 . . -# 4 . . . . . . - -:_p1_0 44u4/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u4/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u4/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u4/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u4/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 44u4/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u4/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u4/res_part7_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 1275 1530 -:_p7_1 44u4/res_part7_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p7_2 44u4/res_part7_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u5.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u5.vqs deleted file mode 100644 index a3c175d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u5.vqs +++ /dev/null @@ -1,35 +0,0 @@ - -GO - ->_44u5_ noninterleaved -haux 44u5/resaux_0.vqd _44u5__short 0,16,2 10 - ->_44u5_ noninterleaved -haux 44u5/resaux_1.vqd _44u5__long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 4 16 60 + -# 30 0 50 0 80 0 0 0 -# -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44u5/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u5/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u5/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u5/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u5/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44u5/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p7_0 44u5/res_part7_pass0.vqd, 4, nonseq, 0 +- 11 -:_p7_1 44u5/res_part7_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p8_0 44u5/res_part8_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 -:_p8_1 44u5/res_part8_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p9_0 44u5/res_part9_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 1275 1530 -:_p9_1 44u5/res_part9_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p9_2 44u5/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u6.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u6.vqs deleted file mode 100644 index ca8b7b1..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u6.vqs +++ /dev/null @@ -1,35 +0,0 @@ - -GO - ->_44u6_ noninterleaved -haux 44u6/resaux_0.vqd _44u6__short 0,16,2 10 - ->_44u6_ noninterleaved -haux 44u6/resaux_1.vqd _44u6__long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 4 16 60 + -# 30 0 50 0 80 0 0 0 -# -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44u6/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u6/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u6/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u6/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u6/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44u6/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p7_0 44u6/res_part7_pass0.vqd, 4, nonseq, 0 +- 11 -:_p7_1 44u6/res_part7_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p8_0 44u6/res_part8_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 -:_p8_1 44u6/res_part8_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p9_0 44u6/res_part9_pass0.vqd, 2, nonseq, 0 +- 255 510 765 1020 1275 1530 1785 -:_p9_1 44u6/res_part9_pass1.vqd, 2, nonseq, 0 +- 17 34 51 68 85 102 119 -:_p9_2 44u6/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u7.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u7.vqs deleted file mode 100644 index 2efe5aa..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u7.vqs +++ /dev/null @@ -1,34 +0,0 @@ -GO - ->_44u7_ noninterleaved -haux 44u7/resaux_0.vqd _44u7__short 0,16,2 10 - ->_44u7_ noninterleaved -haux 44u7/resaux_1.vqd _44u7__long 0,64,2 10 - -#iter 0 - -# 0 1 1 2 2 4 4 16 60 + -# 30 0 50 0 80 0 0 0 -# -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . -# 2 . . . -# 4 . . . . . . . - -:_p1_0 44u7/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u7/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 44u7/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 44u7/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 44u7/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 44u7/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p7_0 44u7/res_part7_pass0.vqd, 4, nonseq, 0 +- 11 -:_p7_1 44u7/res_part7_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p8_0 44u7/res_part8_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 -:_p8_1 44u7/res_part8_pass1.vqd, 2, nonseq, 0 +- 1 2 3 4 5 - -:_p9_0 44u7/res_part9_pass0.vqd, 2, nonseq, 0 +- 637 1274 1911 2548 3185 -:_p9_1 44u7/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 -:_p9_2 44u7/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u8.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u8.vqs deleted file mode 100644 index ecedb09..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u8.vqs +++ /dev/null @@ -1,35 +0,0 @@ -GO - ->_44u8s noninterleaved -haux 44u8/resaux_0.vqd _44u8__short 0,16,2 10 - ->_44u8 noninterleaved -haux 44u8/resaux_1.vqd _44u8__long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44u8/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u8/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44u8/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44u8/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44u8/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44u8/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44u8/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u8/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u8/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44u8/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44u8/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44u8/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44u8/res_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 -:_p9_1 44u8/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 44u8/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/44u9.vqs b/ExternalLibs/libvorbis-1.3.1/vq/44u9.vqs deleted file mode 100644 index 42a3877..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/44u9.vqs +++ /dev/null @@ -1,36 +0,0 @@ - -GO - ->_44u9s noninterleaved -haux 44u9/resaux_0.vqd _44u9__short 0,16,2 10 - ->_44u9 noninterleaved -haux 44u9/resaux_1.vqd _44u9__long 0,64,2 10 - - -# 0 1 2 4 8 16 32 71 157 + -# 0 1 2 3 4 5 6 7 8 9 -# 1 . . . . . -# 2 . . . . . -# 4 . . . . . - -:_p1_0 44u9/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 44u9/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 44u9/res_part3_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p4_0 44u9/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - -:_p5_0 44u9/res_part5_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p5_1 44u9/res_part5_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p6_0 44u9/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 44u9/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p7_0 44u9/res_part7_pass0.vqd, 2, nonseq, 0 +- 11 22 33 44 55 66 -:_p7_1 44u9/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 44u9/res_part8_pass0.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p8_1 44u9/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 9 10 - -:_p9_0 44u9/res_part9_pass0.vqd, 2, nonseq, 0 +- 931 1862 2793 3724 4655 5586 6517 -:_p9_1 44u9/res_part9_pass1.vqd, 2, nonseq, 0 +- 49 98 147 196 245 294 343 392 441 -:_p9_2 44u9/res_part9_pass2.vqd, 1, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/8.vqs b/ExternalLibs/libvorbis-1.3.1/vq/8.vqs deleted file mode 100644 index 517a589..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/8.vqs +++ /dev/null @@ -1,43 +0,0 @@ -GO - ->_8c0_s noninterleaved -haux 8c0_s/resaux_0.vqd _8c0_s_single 0,64,2 10 - -:_p1_0 8c0_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 8c0_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 8c0_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 8c0_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 8c0_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 8c0_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 8c0_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 8c0_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 8c0_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 8c0_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 8c0_s/res_part9_pass0.vqd, 4, nonseq, 0 +- 315 -:_p9_1 8c0_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p9_2 8c0_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 - ->_8c1_s noninterleaved -haux 8c1_s/resaux_0.vqd _8c1_s_single 0,64,2 10 - -:_p1_0 8c1_s/res_part1_pass2.vqd, 8, nonseq cull, 0 +- 1 -:_p2_0 8c1_s/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p3_0 8c1_s/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 8c1_s/res_part4_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p5_0 8c1_s/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 -:_p6_0 8c1_s/res_part6_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 6 7 8 - - -:_p7_0 8c1_s/res_part7_pass0.vqd, 4, nonseq cull, 0 +- 11 -:_p7_1 8c1_s/res_part7_pass1.vqd, 2, nonseq cull, 0 +- 1 2 3 4 5 - -:_p8_0 8c1_s/res_part8_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p8_1 8c1_s/res_part8_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - -:_p9_0 8c1_s/res_part9_pass0.vqd, 2, nonseq, 0 +- 315 630 945 1260 1575 1890 -:_p9_1 8c1_s/res_part9_pass1.vqd, 2, nonseq, 0 +- 21 42 63 84 105 126 147 -:_p9_2 8c1_s/res_part9_pass2.vqd, 2, nonseq, 0 +- 1 2 3 4 5 6 7 8 9 10 diff --git a/ExternalLibs/libvorbis-1.3.1/vq/8u.vqs b/ExternalLibs/libvorbis-1.3.1/vq/8u.vqs deleted file mode 100644 index 0ed0ec8..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/8u.vqs +++ /dev/null @@ -1,41 +0,0 @@ - -GO - ->_8u0_ noninterleaved -haux 8u0/resaux_0.vqd _8u0__single 0,64,2 8 - - -:_p1_0 8u0/res_part1_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p2_0 8u0/res_part2_pass2.vqd, 4, nonseq cull, 0 +- 1 -:_p3_0 8u0/res_part3_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p4_0 8u0/res_part4_pass2.vqd, 4, nonseq cull, 0 +- 1 2 -:_p5_0 8u0/res_part5_pass2.vqd, 2, nonseq cull, 0 +- 1 2 3 4 - -:_p6_0 8u0/res_part6_pass0.vqd, 2, nonseq cull, 0 +- 5 10 15 20 25 30 -:_p6_1 8u0/res_part6_pass1.vqd, 2, nonseq cull, 0 +- 1 2 - 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PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for loading .vqh and .vqd files - last mod: $Id: bookutil.c 16959 2010-03-10 16:03:11Z xiphmont $ - - ********************************************************************/ - -#include -#include -#include -#include -#include -#include "bookutil.h" - -int _best(codebook *book, float *a, int step){ - - int dim=book->dim; - int i,j,o; - int minval=book->minval; - int del=book->delta; - int qv=book->quantvals; - int ze=(qv>>1); - int index=0; - /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */ - - if(del!=1){ - for(i=0,o=step*(dim-1);i>1))/del; - int m = (v=qv?qv-1:m)); - } - }else{ - for(i=0,o=step*(dim-1);i=qv?qv-1:m)); - } - } - - if(book->c->lengthlist[index]<=0){ - const static_codebook *c=book->c; - int best=-1; - /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */ - int e[8]={0,0,0,0,0,0,0,0}; - int maxval = book->minval + book->delta*(book->quantvals-1); - for(i=0;ientries;i++){ - if(c->lengthlist[i]>0){ - float this=0; - for(j=0;j=maxval) - e[j++]=0; - if(e[j]>=0) - e[j]+=book->delta; - e[j]= -e[j]; - } - } - - return index; -} - -/* A few little utils for reading files */ -/* read a line. Use global, persistent buffering */ -static char *linebuffer=NULL; -static int lbufsize=0; -char *get_line(FILE *in){ - long sofar=0; - if(feof(in))return NULL; - - while(1){ - int gotline=0; - - while(!gotline){ - if(sofar+1>=lbufsize){ - if(!lbufsize){ - lbufsize=1024; - linebuffer=_ogg_malloc(lbufsize); - }else{ - lbufsize*=2; - linebuffer=_ogg_realloc(linebuffer,lbufsize); - } - } - { - long c=fgetc(in); - switch(c){ - case EOF: - if(sofar==0)return(NULL); - /* fallthrough correct */ - case '\n': - linebuffer[sofar]='\0'; - gotline=1; - break; - default: - linebuffer[sofar++]=c; - linebuffer[sofar]='\0'; - break; - } - } - } - - if(linebuffer[0]=='#'){ - sofar=0; - }else{ - return(linebuffer); - } - } -} - -/* read the next numerical value from the given file */ -static char *value_line_buff=NULL; - -int get_line_value(FILE *in,float *value){ - char *next; - - if(!value_line_buff)return(-1); - - *value=strtod(value_line_buff, &next); - if(next==value_line_buff){ - value_line_buff=NULL; - return(-1); - }else{ - value_line_buff=next; - while(*value_line_buff>44)value_line_buff++; - if(*value_line_buff==44)value_line_buff++; - return(0); - } -} - -int get_next_value(FILE *in,float *value){ - while(1){ - if(get_line_value(in,value)){ - value_line_buff=get_line(in); - if(!value_line_buff)return(-1); - }else{ - return(0); - } - } -} - -int get_next_ivalue(FILE *in,long *ivalue){ - float value; - int ret=get_next_value(in,&value); - *ivalue=value; - return(ret); -} - -static float sequence_base=0.f; -static int v_sofar=0; -void reset_next_value(void){ - value_line_buff=NULL; - sequence_base=0.f; - v_sofar=0; -} - -char *setup_line(FILE *in){ - reset_next_value(); - value_line_buff=get_line(in); - return(value_line_buff); -} - - -int get_vector(codebook *b,FILE *in,int start, int n,float *a){ - int i; - const static_codebook *c=b->c; - - while(1){ - - if(v_sofar==n || get_line_value(in,a)){ - reset_next_value(); - if(get_next_value(in,a)) - break; - for(i=0;idim;i++) - if(get_line_value(in,a+i)) - break; - - if(i==c->dim){ - float temp=a[c->dim-1]; - for(i=0;idim;i++)a[i]-=sequence_base; - if(c->q_sequencep)sequence_base=temp; - v_sofar++; - return(0); - } - sequence_base=0.f; - } - - return(-1); -} - -/* read lines fromt he beginning until we find one containing the - specified string */ -char *find_seek_to(FILE *in,char *s){ - rewind(in); - while(1){ - char *line=get_line(in); - if(line){ - if(strstr(line,s)) - return(line); - }else - return(NULL); - } -} - - -/* this reads the format as written by vqbuild/latticebuild; innocent - (legal) tweaking of the file that would not affect its valid - header-ness will break this routine */ - -codebook *codebook_load(char *filename){ - codebook *b=_ogg_calloc(1,sizeof(codebook)); - static_codebook *c=(static_codebook *)(b->c=_ogg_calloc(1,sizeof(static_codebook))); - int quant_to_read=0; - FILE *in=fopen(filename,"r"); - char *line; - long i; - - if(in==NULL){ - fprintf(stderr,"Couldn't open codebook %s\n",filename); - exit(1); - } - - /* find the codebook struct */ - find_seek_to(in,"static const static_codebook "); - - /* get the major important values */ - line=get_line(in); - if(sscanf(line,"%ld, %ld,", - &(c->dim),&(c->entries))!=2){ - fprintf(stderr,"1: syntax in %s in line:\t %s",filename,line); - exit(1); - } - line=get_line(in); - line=get_line(in); - if(sscanf(line,"%d, %ld, %ld, %d, %d,", - &(c->maptype),&(c->q_min),&(c->q_delta),&(c->q_quant), - &(c->q_sequencep))!=5){ - fprintf(stderr,"1: syntax in %s in line:\t %s",filename,line); - exit(1); - } - - switch(c->maptype){ - case 0: - quant_to_read=0; - break; - case 1: - quant_to_read=_book_maptype1_quantvals(c); - break; - case 2: - quant_to_read=c->entries*c->dim; - break; - } - - /* load the quantized entries */ - find_seek_to(in,"static const long _vq_quantlist_"); - reset_next_value(); - c->quantlist=_ogg_malloc(sizeof(long)*quant_to_read); - for(i=0;iquantlist+i)){ - fprintf(stderr,"out of data while reading codebook %s\n",filename); - exit(1); - } - - /* load the lengthlist */ - find_seek_to(in,"_lengthlist"); - reset_next_value(); - c->lengthlist=_ogg_malloc(sizeof(long)*c->entries); - for(i=0;ientries;i++) - if(get_next_ivalue(in,c->lengthlist+i)){ - fprintf(stderr,"out of data while reading codebook %s\n",filename); - exit(1); - } - - /* got it all */ - fclose(in); - - vorbis_book_init_encode(b,c); - b->valuelist=_book_unquantize(c,c->entries,NULL); - - return(b); -} - -void spinnit(char *s,int n){ - static int p=0; - static long lasttime=0; - long test; - struct timeval thistime; - - gettimeofday(&thistime,NULL); - test=thistime.tv_sec*10+thistime.tv_usec/100000; - if(lasttime!=test){ - lasttime=test; - - fprintf(stderr,"%s%d ",s,n); - - p++;if(p>3)p=0; - switch(p){ - case 0: - fprintf(stderr,"| \r"); - break; - case 1: - fprintf(stderr,"/ \r"); - break; - case 2: - fprintf(stderr,"- \r"); - break; - case 3: - fprintf(stderr,"\\ \r"); - break; - } - fflush(stderr); - } -} - -void build_tree_from_lengths(int vals, long *hist, long *lengths){ - int i,j; - long *membership=_ogg_malloc(vals*sizeof(long)); - long *histsave=alloca(vals*sizeof(long)); - memcpy(histsave,hist,vals*sizeof(long)); - - for(i=0;i1;i--){ - int first=-1,second=-1; - long least=-1; - - spinnit("building... ",i); - - /* find the two nodes to join */ - for(j=0;j0) - newhist[upper++]=hist[i]; - - if(upper != vals){ - fprintf(stderr,"\rEliminating %d unused entries; %d entries remain\n", - vals-upper,upper); - } - - build_tree_from_lengths(upper,newhist,lengthlist); - - upper=0; - for(i=0;i0) - lengths[i]=lengthlist[upper++]; - else - lengths[i]=0; - - free(lengthlist); -} - -void write_codebook(FILE *out,char *name,const static_codebook *c){ - int i,j,k; - - /* save the book in C header form */ - - /* first, the static vectors, then the book structure to tie it together. */ - /* quantlist */ - if(c->quantlist){ - long vals=(c->maptype==1?_book_maptype1_quantvals(c):c->entries*c->dim); - fprintf(out,"static const long _vq_quantlist_%s[] = {\n",name); - for(j=0;jquantlist[j]); - } - fprintf(out,"};\n\n"); - } - - /* lengthlist */ - fprintf(out,"static const long _vq_lengthlist_%s[] = {\n",name); - for(j=0;jentries;){ - fprintf(out,"\t"); - for(k=0;k<16 && jentries;k++,j++) - fprintf(out,"%2ld,",c->lengthlist[j]); - fprintf(out,"\n"); - } - fprintf(out,"};\n\n"); - - /* tie it all together */ - - fprintf(out,"static const static_codebook %s = {\n",name); - - fprintf(out,"\t%ld, %ld,\n",c->dim,c->entries); - fprintf(out,"\t(long *)_vq_lengthlist_%s,\n",name); - fprintf(out,"\t%d, %ld, %ld, %d, %d,\n", - c->maptype,c->q_min,c->q_delta,c->q_quant,c->q_sequencep); - if(c->quantlist) - fprintf(out,"\t(long *)_vq_quantlist_%s,\n",name); - else - fprintf(out,"\tNULL,\n"); - - fprintf(out,"\t0\n};\n\n"); -} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/bookutil.h b/ExternalLibs/libvorbis-1.3.1/vq/bookutil.h deleted file mode 100644 index 1e10229..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/bookutil.h +++ /dev/null @@ -1,43 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility functions for loading .vqh and .vqd files - last mod: $Id: bookutil.h 13293 2007-07-24 00:09:47Z xiphmont $ - - ********************************************************************/ - -#ifndef _V_BOOKUTIL_H_ -#define _V_BOOKUTIL_H_ - -#include -#include - -#include "localcodebook.h" - -extern char *get_line(FILE *in); -extern char *setup_line(FILE *in); -extern int get_line_value(FILE *in,float *value); -extern int get_next_value(FILE *in,float *value); -extern int get_next_ivalue(FILE *in,long *ivalue); -extern void reset_next_value(void); -extern int get_vector(codebook *b,FILE *in,int start,int num,float *a); -extern char *find_seek_to(FILE *in,char *s); - -extern codebook *codebook_load(char *filename); -extern void write_codebook(FILE *out,char *name,const static_codebook *c); - -extern void spinnit(char *s,int n); -extern void build_tree_from_lengths(int vals, long *hist, long *lengths); -extern void build_tree_from_lengths0(int vals, long *hist, long *lengths); - -#endif - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/distribution.c b/ExternalLibs/libvorbis-1.3.1/vq/distribution.c deleted file mode 100644 index b678bbf..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/distribution.c +++ /dev/null @@ -1,248 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: utility for finding the distribution in a data set - last mod: $Id: distribution.c 16037 2009-05-26 21:10:58Z xiphmont $ - - ********************************************************************/ - -#include -#include -#include -#include -#include -#include "bookutil.h" - -/* command line: - distribution file.vqd -*/ - -int ascend(const void *a,const void *b){ - return(**((long **)a)-**((long **)b)); -} - -int main(int argc,char *argv[]){ - FILE *in; - long lines=0; - float min; - float max; - long bins=-1; - int flag=0; - long *countarray; - long total=0; - char *line; - - if(argv[1]==NULL){ - fprintf(stderr,"Usage: distribution {data.vqd [bins]| book.vqh} \n\n"); - exit(1); - } - if(argv[2]!=NULL) - bins=atoi(argv[2])-1; - - in=fopen(argv[1],"r"); - if(!in){ - fprintf(stderr,"Could not open input file %s\n",argv[1]); - exit(1); - } - - if(strrchr(argv[1],'.') && strcmp(strrchr(argv[1],'.'),".vqh")==0){ - /* load/decode a book */ - - codebook *b=codebook_load(argv[1]); - static_codebook *c=(static_codebook *)(b->c); - float delta; - int i; - fclose(in); - - switch(c->maptype){ - case 0: - printf("entropy codebook only; no mappings\n"); - exit(0); - break; - case 1: - bins=_book_maptype1_quantvals(c); - break; - case 2: - bins=c->entries*c->dim; - break; - } - - max=min=_float32_unpack(c->q_min); - delta=_float32_unpack(c->q_delta); - - for(i=0;iquantlist[i]*delta+min; - if(val>max)max=val; - } - - printf("Minimum scalar value: %f\n",min); - printf("Maximum scalar value: %f\n",max); - - switch(c->maptype){ - case 1: - { - /* lattice codebook. dump it. */ - int j,k; - long maxcount=0; - long **sort=calloc(bins,sizeof(long *)); - long base=c->lengthlist[0]; - countarray=calloc(bins,sizeof(long)); - - for(i=0;iquantlist+i; - qsort(sort,bins,sizeof(long *),ascend); - - for(i=0;ientries;i++) - if(c->lengthlist[i]>base)base=c->lengthlist[i]; - - /* dump a full, correlated count */ - for(j=0;jentries;j++){ - if(c->lengthlist[j]){ - int indexdiv=1; - printf("%4d: ",j); - for(k=0;kdim;k++){ - int index= (j/indexdiv)%bins; - printf("%+3.1f,", c->quantlist[index]*_float32_unpack(c->q_delta)+ - _float32_unpack(c->q_min)); - indexdiv*=bins; - } - printf("\t|"); - for(k=0;klengthlist[j];k++)printf("*"); - printf("\n"); - } - } - - /* do a rough count */ - for(j=0;jentries;j++){ - int indexdiv=1; - for(k=0;kdim;k++){ - if(c->lengthlist[j]){ - int index= (j/indexdiv)%bins; - countarray[index]+=(1<<(base-c->lengthlist[j])); - indexdiv*=bins; - } - } - } - - /* dump the count */ - - { - long maxcount=0,i,j; - for(i=0;imaxcount)maxcount=countarray[i]; - - for(i=0;iquantlist; - int stars=rint(50./maxcount*countarray[ptr]); - printf("%+08f (%8ld) |",c->quantlist[ptr]*delta+min,countarray[ptr]); - for(j=0;jmax)max=code; - } - - line=setup_line(in); - } - - if(bins<1){ - if((int)(max-min)==min-max){ - bins=max-min; - }else{ - bins=25; - } - } - - printf("\r \r"); - printf("Minimum scalar value: %f\n",min); - printf("Maximum scalar value: %f\n",max); - - if(argv[2]){ - - printf("\n counting hits into %ld bins...\n",bins+1); - countarray=calloc(bins+1,sizeof(long)); - - rewind(in); - line=setup_line(in); - while(line){ - float code; - lines--; - if(!(lines&0xff))spinnit("counting distribution. lines so far...",lines); - - while(line && sscanf(line,"%f",&code)==1){ - line=strchr(line,','); - if(line)line++; - - code-=min; - code/=(max-min); - code*=bins; - countarray[(int)rint(code)]++; - total++; - } - - line=setup_line(in); - } - - /* make a pretty graph */ - { - long maxcount=0,i,j; - for(i=0;imaxcount)maxcount=countarray[i]; - - printf("\r \r"); - printf("Total scalars: %ld\n",total); - for(i=0;ifloor_11 -=8-11c0_s 8-11c1_s - -build line_256x4_class0 0-256 -build line_256x4_0sub0 0-4 -build line_256x4_0sub1 4-10 -build line_256x4_0sub2 10-25 -build line_256x4_0sub3 25-64 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/floor_22.vqs b/ExternalLibs/libvorbis-1.3.1/vq/floor_22.vqs deleted file mode 100644 index b80328e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/floor_22.vqs +++ /dev/null @@ -1,27 +0,0 @@ -GO ->floor_22 -=22c0_s 22c1_s 22c2_s - -build line_256x7_class0 0-64 -build line_256x7_class1 0-256 -build line_256x7_0sub1 1-9 -build line_256x7_0sub2 9-25 -build line_256x7_0sub3 25-64 -build line_256x7_1sub1 1-9 -build line_256x7_1sub2 9-25 -build line_256x7_1sub3 25-64 - -build line_512x17_class1 0-8 -build line_512x17_class2 0-64 -build line_512x17_class3 0-64 -build line_512x17_0sub0 0-128 -build line_512x17_1sub0 0-32 -build line_512x17_1sub1 32-128 -build line_512x17_2sub1 1-18 -build line_512x17_2sub2 18-50 -build line_512x17_2sub3 50-128 -build line_512x17_3sub1 1-18 -build line_512x17_3sub2 18-50 -build line_512x17_3sub3 50-128 - - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/floor_44.vqs b/ExternalLibs/libvorbis-1.3.1/vq/floor_44.vqs deleted file mode 100644 index dd213f7..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/floor_44.vqs +++ /dev/null @@ -1,83 +0,0 @@ -GO ->floor_44 -=44c-1_s 44c0_s 44c1_s 44c2_s 44c3_s 44c4_s 44c5_s 44c6_s 44c7_s 44c8_s 44c9_s - -build line_128x4_class0 0-256 -build line_128x4_0sub0 0-4 -build line_128x4_0sub1 4-10 -build line_128x4_0sub2 10-25 -build line_128x4_0sub3 25-64 - -build line_256x4_class0 0-256 -build line_256x4_0sub0 0-4 -build line_256x4_0sub1 4-10 -build line_256x4_0sub2 10-25 -build line_256x4_0sub3 25-64 - -build line_128x7_class0 0-64 -build line_128x7_class1 0-256 -build line_128x7_0sub1 1-9 -build line_128x7_0sub2 9-25 -build line_128x7_0sub3 25-64 -build line_128x7_1sub1 1-9 -build line_128x7_1sub2 9-25 -build line_128x7_1sub3 25-64 - -build line_128x11_class1 0-8 -build line_128x11_class2 0-64 -build line_128x11_class3 0-64 -build line_128x11_0sub0 0-128 -build line_128x11_1sub0 0-32 -build line_128x11_1sub1 32-128 -build line_128x11_2sub1 1-18 -build line_128x11_2sub2 18-50 -build line_128x11_2sub3 50-128 -build line_128x11_3sub1 1-18 -build line_128x11_3sub2 18-50 -build line_128x11_3sub3 50-128 - -build line_128x17_class1 0-8 -build line_128x17_class2 0-64 -build line_128x17_class3 0-64 -build line_128x17_0sub0 0-128 -build line_128x17_1sub0 0-32 -build line_128x17_1sub1 32-128 -build line_128x17_2sub1 1-18 -build line_128x17_2sub2 18-50 -build line_128x17_2sub3 50-128 -build line_128x17_3sub1 1-18 -build line_128x17_3sub2 18-50 -build line_128x17_3sub3 50-128 - -build line_1024x27_class1 0-16 -build line_1024x27_class2 0-8 -build line_1024x27_class3 0-256 -build line_1024x27_class4 0-64 -build line_1024x27_0sub0 0-128 -build line_1024x27_1sub0 0-32 -build line_1024x27_1sub1 32-128 -build line_1024x27_2sub0 0-32 -build line_1024x27_2sub1 32-128 -build line_1024x27_3sub1 1-18 -build line_1024x27_3sub2 18-50 -build line_1024x27_3sub3 50-128 -build line_1024x27_4sub1 1-18 -build line_1024x27_4sub2 18-50 -build line_1024x27_4sub3 50-128 - -build line_2048x27_class1 0-16 -build line_2048x27_class2 0-8 -build line_2048x27_class3 0-256 -build line_2048x27_class4 0-64 -build line_2048x27_0sub0 0-128 -build line_2048x27_1sub0 0-32 -build line_2048x27_1sub1 32-128 -build line_2048x27_2sub0 0-32 -build line_2048x27_2sub1 32-128 -build line_2048x27_3sub1 1-18 -build line_2048x27_3sub2 18-50 -build line_2048x27_3sub3 50-128 -build line_2048x27_4sub1 1-18 -build line_2048x27_4sub2 18-50 -build line_2048x27_4sub3 50-128 - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/huffbuild.c b/ExternalLibs/libvorbis-1.3.1/vq/huffbuild.c deleted file mode 100644 index a7aaeaa..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/huffbuild.c +++ /dev/null @@ -1,198 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: hufftree builder - last mod: $Id: huffbuild.c 16959 2010-03-10 16:03:11Z xiphmont $ - - ********************************************************************/ - -#include -#include -#include -#include -#include "bookutil.h" - -static int nsofar=0; -static int getval(FILE *in,int begin,int n,int group,int max){ - float v; - int i; - long val=0; - - if(nsofar>=n || get_line_value(in,&v)){ - reset_next_value(); - nsofar=0; - if(get_next_value(in,&v)) - return(-1); - for(i=1;i<=begin;i++) - get_line_value(in,&v); - } - - val=(int)v; - nsofar++; - - for(i=1;i=n || get_line_value(in,&v)) - return(getval(in,begin,n,group,max)); - else - val = val*max+(int)v; - return(val); -} - -static void usage(){ - fprintf(stderr, - "usage:\n" - "huffbuild .vqd | [noguard]\n" - " where begin,n,group is first scalar, \n" - " number of scalars of each in line,\n" - " number of scalars in a group\n" - "eg: huffbuild reslongaux.vqd 0,1024,4\n" - "produces reslongaux.vqh\n\n"); - exit(1); -} - -int main(int argc, char *argv[]){ - char *base; - char *infile; - int i,j,k,begin,n,subn,guard=1; - FILE *file; - int maxval=0; - int loval=0; - - if(argc<3)usage(); - if(argc==4)guard=0; - - infile=strdup(argv[1]); - base=strdup(infile); - if(strrchr(base,'.')) - strrchr(base,'.')[0]='\0'; - - { - char *pos=strchr(argv[2],','); - char *dpos=strchr(argv[2],'-'); - if(dpos){ - loval=atoi(argv[2]); - maxval=atoi(dpos+1); - subn=1; - begin=0; - }else{ - begin=atoi(argv[2]); - if(!pos) - usage(); - else - n=atoi(pos+1); - pos=strchr(pos+1,','); - if(!pos) - usage(); - else - subn=atoi(pos+1); - if(n/subn*subn != n){ - fprintf(stderr,"n must be divisible by group\n"); - exit(1); - } - } - } - - /* scan the file for maximum value */ - file=fopen(infile,"r"); - if(!file){ - fprintf(stderr,"Could not open file %s\n",infile); - if(!maxval) - exit(1); - else - fprintf(stderr," making untrained books.\n"); - - } - - if(!maxval){ - i=0; - while(1){ - long v; - if(get_next_ivalue(file,&v))break; - if(v>maxval)maxval=v; - - if(!(i++&0xff))spinnit("loading... ",i); - } - rewind(file); - maxval++; - } - - { - long vals=pow(maxval,subn); - long *hist=_ogg_calloc(vals,sizeof(long)); - long *lengths=_ogg_calloc(vals,sizeof(long)); - - for(j=loval;j=vals)break; - hist[val]++; - if(!(i--&0xff))spinnit("loading... ",i*subn); - } - fclose(file); - } - - /* we have the probabilities, build the tree */ - fprintf(stderr,"Building tree for %ld entries\n",vals); - build_tree_from_lengths0(vals,hist,lengths); - - /* save the book */ - { - char *buffer=alloca(strlen(base)+5); - strcpy(buffer,base); - strcat(buffer,".vqh"); - file=fopen(buffer,"w"); - if(!file){ - fprintf(stderr,"Could not open file %s\n",buffer); - exit(1); - } - } - - /* first, the static vectors, then the book structure to tie it together. */ - /* lengthlist */ - fprintf(file,"static const long _huff_lengthlist_%s[] = {\n",base); - for(j=0;j -#include -#include -#include -#include -#include "bookutil.h" - -/* The purpose of this util is just to finish packaging the - description into a static codebook. It used to count hits for a - histogram, but I've divorced that out to add some flexibility (it - currently generates an equal probability codebook) - - command line: - latticebuild description.vql - - the lattice description file contains two lines: - - - ... - - a threshmap (or pigeonmap) struct is generated by latticehint; - there are fun tricks one can do with the threshmap and cascades, - but the utils don't know them... - - entropy encoding is done by feeding an entry list collected from a - training set and feeding it to latticetune along with the book. - - latticebuild produces a codebook on stdout */ - -static int ilog(unsigned int v){ - int ret=0; - while(v){ - ret++; - v>>=1; - } - return(ret); -} - -int main(int argc,char *argv[]){ - codebook b; - static_codebook c; - double *quantlist; - long *hits; - - int entries=-1,dim=-1,quantvals=-1,addmul=-1,sequencep=0; - FILE *in=NULL; - char *line,*name; - long i,j; - - memset(&b,0,sizeof(b)); - memset(&c,0,sizeof(c)); - - if(argv[1]==NULL){ - fprintf(stderr,"Need a lattice description file on the command line.\n"); - exit(1); - } - - { - char *ptr; - char *filename=_ogg_calloc(strlen(argv[1])+4,1); - - strcpy(filename,argv[1]); - in=fopen(filename,"r"); - if(!in){ - fprintf(stderr,"Could not open input file %s\n",filename); - exit(1); - } - - ptr=strrchr(filename,'.'); - if(ptr){ - *ptr='\0'; - name=strdup(filename); - }else{ - name=strdup(filename); - } - - } - - /* read the description */ - line=get_line(in); - if(sscanf(line,"%d %d %d %d",&quantvals,&dim,&addmul,&sequencep)!=4){ - if(sscanf(line,"%d %d %d",&quantvals,&dim,&addmul)!=3){ - fprintf(stderr,"Syntax error reading description file (line 1)\n"); - exit(1); - } - } - entries=pow(quantvals,dim); - c.dim=dim; - c.entries=entries; - c.lengthlist=_ogg_malloc(entries*sizeof(long)); - c.maptype=1; - c.q_sequencep=sequencep; - c.quantlist=_ogg_calloc(quantvals,sizeof(long)); - - quantlist=_ogg_malloc(sizeof(double)*c.dim*c.entries); - hits=_ogg_malloc(c.entries*sizeof(long)); - for(j=0;j.00001f) break; - } - if(fac>100)break; - if(jc.q_quant)c.q_quant=ilog(c.quantlist[j]); - } - } - - /* build the [default] codeword lengths */ - memset(c.lengthlist,0,sizeof(long)*entries); - for(i=0;i -#include -#include -#include -#include -#include "bookutil.h" - -static int strrcmp_i(char *s,char *cmp){ - return(strncmp(s+strlen(s)-strlen(cmp),cmp,strlen(cmp))); -} - -/* This util takes a training-collected file listing codewords used in - LSP fitting, then generates new codeword lengths for maximally - efficient integer-bits entropy encoding. - - command line: - latticetune book.vqh input.vqd [unused_entriesp] - - latticetune produces book.vqh on stdout */ - -int main(int argc,char *argv[]){ - codebook *b; - static_codebook *c; - long *lengths; - long *hits; - - int entries=-1,dim=-1,guard=1; - FILE *in=NULL; - char *line,*name; - long j; - - if(argv[1]==NULL){ - fprintf(stderr,"Need a lattice codebook on the command line.\n"); - exit(1); - } - if(argv[2]==NULL){ - fprintf(stderr,"Need a codeword data file on the command line.\n"); - exit(1); - } - if(argv[3]!=NULL)guard=0; - - { - char *ptr; - char *filename=strdup(argv[1]); - - b=codebook_load(filename); - c=(static_codebook *)(b->c); - - ptr=strrchr(filename,'.'); - if(ptr){ - *ptr='\0'; - name=strdup(filename); - }else{ - name=strdup(filename); - } - } - - if(c->maptype!=1){ - fprintf(stderr,"Provided book is not a latticebook.\n"); - exit(1); - } - - entries=b->entries; - dim=b->dim; - - hits=_ogg_malloc(entries*sizeof(long)); - lengths=_ogg_calloc(entries,sizeof(long)); - for(j=0;jlengthlist=lengths; - write_codebook(stdout,name,c); - - { - long bins=_book_maptype1_quantvals(c); - long i,k,base=c->lengthlist[0]; - for(i=0;ilengthlist[i]>base)base=c->lengthlist[i]; - - for(j=0;jlengthlist[j]){ - int indexdiv=1; - fprintf(stderr,"%4ld: ",j); - for(k=0;kdim;k++){ - int index= (j/indexdiv)%bins; - fprintf(stderr,"%+3.1f,", c->quantlist[index]*_float32_unpack(c->q_delta)+ - _float32_unpack(c->q_min)); - indexdiv*=bins; - } - fprintf(stderr,"\t|"); - for(k=0;klengthlist[j];k++)fprintf(stderr,"*"); - fprintf(stderr,"\n"); - } - } - } - - fprintf(stderr,"\r " - "\nDone.\n"); - exit(0); -} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/localcodebook.h b/ExternalLibs/libvorbis-1.3.1/vq/localcodebook.h deleted file mode 100644 index fa6d069..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/localcodebook.h +++ /dev/null @@ -1,121 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: basic shared codebook operations - last mod: $Id: localcodebook.h 16959 2010-03-10 16:03:11Z xiphmont $ - - ********************************************************************/ - -#ifndef _V_CODEBOOK_H_ -#define _V_CODEBOOK_H_ - -#include - -/* This structure encapsulates huffman and VQ style encoding books; it - doesn't do anything specific to either. - - valuelist/quantlist are nonNULL (and q_* significant) only if - there's entry->value mapping to be done. - - If encode-side mapping must be done (and thus the entry needs to be - hunted), the auxiliary encode pointer will point to a decision - tree. This is true of both VQ and huffman, but is mostly useful - with VQ. - -*/ - -typedef struct static_codebook{ - long dim; /* codebook dimensions (elements per vector) */ - long entries; /* codebook entries */ - long *lengthlist; /* codeword lengths in bits */ - - /* mapping ***************************************************************/ - int maptype; /* 0=none - 1=implicitly populated values from map column - 2=listed arbitrary values */ - - /* The below does a linear, single monotonic sequence mapping. */ - long q_min; /* packed 32 bit float; quant value 0 maps to minval */ - long q_delta; /* packed 32 bit float; val 1 - val 0 == delta */ - int q_quant; /* bits: 0 < quant <= 16 */ - int q_sequencep; /* bitflag */ - - long *quantlist; /* map == 1: (int)(entries^(1/dim)) element column map - map == 2: list of dim*entries quantized entry vals - */ - int allocedp; -} static_codebook; - -typedef struct codebook{ - long dim; /* codebook dimensions (elements per vector) */ - long entries; /* codebook entries */ - long used_entries; /* populated codebook entries */ - static_codebook *c; - - /* for encode, the below are entry-ordered, fully populated */ - /* for decode, the below are ordered by bitreversed codeword and only - used entries are populated */ - float *valuelist; /* list of dim*entries actual entry values */ - ogg_uint32_t *codelist; /* list of bitstream codewords for each entry */ - - int *dec_index; /* only used if sparseness collapsed */ - char *dec_codelengths; - ogg_uint32_t *dec_firsttable; - int dec_firsttablen; - int dec_maxlength; - - /* The current encoder uses only centered, integer-only lattice books. */ - int quantvals; - int minval; - int delta; - -} codebook; - -extern void vorbis_staticbook_clear(static_codebook *b); -extern void vorbis_staticbook_destroy(static_codebook *b); -extern int vorbis_book_init_encode(codebook *dest,const static_codebook *source); -extern int vorbis_book_init_decode(codebook *dest,const static_codebook *source); -extern void vorbis_book_clear(codebook *b); - -extern float *_book_unquantize(const static_codebook *b,int n,int *map); -extern float *_book_logdist(const static_codebook *b,float *vals); -extern float _float32_unpack(long val); -extern long _float32_pack(float val); -extern int _best(codebook *book, float *a, int step); -extern int _ilog(unsigned int v); -extern long _book_maptype1_quantvals(const static_codebook *b); - -extern int vorbis_book_besterror(codebook *book,float *a,int step,int addmul); -extern long vorbis_book_codeword(codebook *book,int entry); -extern long vorbis_book_codelen(codebook *book,int entry); - - - -extern int vorbis_staticbook_pack(const static_codebook *c,oggpack_buffer *b); -extern int vorbis_staticbook_unpack(oggpack_buffer *b,static_codebook *c); - -extern int vorbis_book_encode(codebook *book, int a, oggpack_buffer *b); - -extern long vorbis_book_decode(codebook *book, oggpack_buffer *b); -extern long vorbis_book_decodevs_add(codebook *book, float *a, - oggpack_buffer *b,int n); -extern long vorbis_book_decodev_set(codebook *book, float *a, - oggpack_buffer *b,int n); -extern long vorbis_book_decodev_add(codebook *book, float *a, - oggpack_buffer *b,int n); -extern long vorbis_book_decodevv_add(codebook *book, float **a, - long off,int ch, - oggpack_buffer *b,int n); - - - -#endif diff --git a/ExternalLibs/libvorbis-1.3.1/vq/make_floor_books.pl b/ExternalLibs/libvorbis-1.3.1/vq/make_floor_books.pl deleted file mode 100644 index 5c37366..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/make_floor_books.pl +++ /dev/null @@ -1,108 +0,0 @@ -#!/usr/bin/perl - -# quick, very dirty little script so that we can put all the -# information for building a floor book set in one spec file. - -#eg: - -# >floor_44 -# =44c0_s 44c1_s 44c2_s -# build line_128x4_class0 0-256 -# build line_128x4_0sub0 0-4 - -die "Could not open $ARGV[0]: $!" unless open (F,$ARGV[0]); - -$goflag=0; -while($line=){ - - print "#### $line"; - if($line=~m/^GO/){ - $goflag=1; - next; - } - - if($goflag==0){ - if($line=~m/\S+/ && !($line=~m/^\#/) ){ - my $command=$line; - print ">>> $command"; - die "Couldn't shell command.\n\tcommand:$command\n" - if syst($command); - } - next; - } - - # >floor_44 - # this sets the output bookset file name - if($line=~m/^>(\S+)\s+(\S*)/){ - # set the output name - $globalname=$1; - - $command="rm -f $globalname.vqh"; - die "Couldn't remove file.\n\tcommand:$command\n" - if syst($command); - - next; - } - - #=path1 path2 path3 - #set the search path for input files; each build line will look - #for input files in all of the directories in the search path and - #append them for huffbuild input - if($line=~m/^=(.*)/){ - # set the output name - @paths=split(' ',$1); - next; - } - - # build book.vqd 0-3 [noguard] - if($line=~m/^build (.*)/){ - # build a huffman book (no mapping) - my($datafile,$range,$guard)=split(' ',$1); - - $command="rm -f $datafile.tmp"; - print "\n\n>>> $command\n"; - die "Couldn't remove temp file.\n\tcommand:$command\n" - if syst($command); - - # first find all the inputs we want; they'll need to be collected into a single input file - foreach $dir (@paths){ - if (-e "$dir/$datafile.vqd"){ - $command="cat $dir/$datafile.vqd >> $datafile.tmp"; - print ">>> $command\n"; - die "Couldn't append training data.\n\tcommand:$command\n" - if syst($command); - } - } - - my $command="huffbuild $datafile.tmp $range $guard"; - print ">>> $command\n"; - die "Couldn't build huffbook.\n\tcommand:$command\n" - if syst($command); - - $command="cat $datafile.vqh >> $globalname.vqh"; - print ">>> $command\n"; - die "Couldn't append to output book.\n\tcommand:$command\n" - if syst($command); - - $command="rm $datafile.vqh"; - print ">>> $command\n"; - die "Couldn't remove temporary output file.\n\tcommand:$command\n" - if syst($command); - - $command="rm -f $datafile.tmp"; - print ">>> $command\n"; - die "Couldn't remove temporary output file.\n\tcommand:$command\n" - if syst($command); - next; - } - -} - -$command="rm -f temp$$.vqd"; -print ">>> $command\n"; -die "Couldn't remove temp files.\n\tcommand:$command\n" - if syst($command); - -sub syst{ - system(@_)/256; -} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/make_residue_books.pl b/ExternalLibs/libvorbis-1.3.1/vq/make_residue_books.pl deleted file mode 100644 index b37d0dc..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/make_residue_books.pl +++ /dev/null @@ -1,177 +0,0 @@ -#!/usr/bin/perl - -# quick, very dirty little script so that we can put all the -# information for building a residue book set (except the original -# partitioning) in one spec file. - -#eg: - -# >res0_128_128 interleaved -# haux 44c0_s/resaux_0.vqd res0_96_128aux 0,4,2 9 -# :1 res0_128_128_1.vqd, 4, nonseq cull, 0 +- 1 -# :2 res0_128_128_2.vqd, 4, nonseq, 0 +- 1(.7) 2 -# :3 res0_128_128_3.vqd, 4, nonseq, 0 +- 1(.7) 3 5 -# :4 res0_128_128_4.vqd, 2, nonseq, 0 +- 1(.7) 3 5 8 11 -# :5 res0_128_128_5.vqd, 1, nonseq, 0 +- 1 3 5 8 11 14 17 20 24 28 31 35 39 - - -die "Could not open $ARGV[0]: $!" unless open (F,$ARGV[0]); - -$goflag=0; -while($line=){ - - print "#### $line"; - if($line=~m/^GO/){ - $goflag=1; - next; - } - - if($goflag==0){ - if($line=~m/\S+/ && !($line=~m/^\#/) ){ - my $command=$line; - print ">>> $command"; - die "Couldn't shell command.\n\tcommand:$command\n" - if syst($command); - } - next; - } - - # >res0_128_128 - if($line=~m/^>(\S+)\s+(\S*)/){ - # set the output name - $globalname=$1; - $interleave=$2; - next; - } - - # haux 44c0_s/resaux_0.vqd res0_96_128aux 0,4,2 9 - if($line=~m/^h(.*)/){ - # build a huffman book (no mapping) - my($name,$datafile,$bookname,$interval,$range)=split(' ',$1); - - # check the desired subdir to see if the data file exists - if(-e $datafile){ - my $command="cp $datafile $bookname.tmp"; - print ">>> $command\n"; - die "Couldn't access partition data file.\n\tcommand:$command\n" - if syst($command); - - my $command="huffbuild $bookname.tmp $interval"; - print ">>> $command\n"; - die "Couldn't build huffbook.\n\tcommand:$command\n" - if syst($command); - - my $command="rm $bookname.tmp"; - print ">>> $command\n"; - die "Couldn't remove temporary file.\n\tcommand:$command\n" - if syst($command); - }else{ - my $command="huffbuild $bookname.tmp 0-$range"; - print ">>> $command\n"; - die "Couldn't build huffbook.\n\tcommand:$command\n" - if syst($command); - - } - next; - } - - # :1 res0_128_128_1.vqd, 4, nonseq, 0 +- 1 - if($line=~m/^:(.*)/){ - my($namedata,$dim,$seqp,$vals)=split(',',$1); - my($name,$datafile)=split(' ',$namedata); - # build value list - my$plusminus="+"; - my$list; - my$thlist; - my$count=0; - foreach my$val (split(' ',$vals)){ - if($val=~/\-?\+?\d+/){ - my$th; - - # got an explicit threshhint? - if($val=~/([0-9\.]+)\(([^\)]+)/){ - $val=$1; - $th=$2; - } - - if($plusminus=~/-/){ - $list.="-$val "; - if(defined($th)){ - $thlist.="," if(defined($thlist)); - $thlist.="-$th"; - } - $count++; - } - if($plusminus=~/\+/){ - $list.="$val "; - if(defined($th)){ - $thlist.="," if(defined($thlist)); - $thlist.="$th"; - } - $count++; - } - }else{ - $plusminus=$val; - } - } - die "Couldn't open temp file $globalname$name.vql: $!" unless - open(G,">$globalname$name.vql"); - print G "$count $dim 0 "; - if($seqp=~/non/){ - print G "0\n$list\n"; - }else{ - print G "1\n$list\n"; - } - close(G); - - my $command="latticebuild $globalname$name.vql > $globalname$name.vqh"; - print ">>> $command\n"; - die "Couldn't build latticebook.\n\tcommand:$command\n" - if syst($command); - - if(-e $datafile){ - - if($interleave=~/non/){ - $restune="res1tune"; - }else{ - $restune="res0tune"; - } - - if($seqp=~/cull/){ - my $command="$restune $globalname$name.vqh $datafile 1 > temp$$.vqh"; - print ">>> $command\n"; - die "Couldn't tune latticebook.\n\tcommand:$command\n" - if syst($command); - }else{ - my $command="$restune $globalname$name.vqh $datafile > temp$$.vqh"; - print ">>> $command\n"; - die "Couldn't tune latticebook.\n\tcommand:$command\n" - if syst($command); - } - - my $command="mv temp$$.vqh $globalname$name.vqh"; - print ">>> $command\n"; - die "Couldn't rename latticebook.\n\tcommand:$command\n" - if syst($command); - - }else{ - print "No matching training file; leaving this codebook untrained.\n"; - } - - my $command="rm $globalname$name.vql"; - print ">>> $command\n"; - die "Couldn't remove temp files.\n\tcommand:$command\n" - if syst($command); - - next; - } -} - -$command="rm -f temp$$.vqd"; -print ">>> $command\n"; -die "Couldn't remove temp files.\n\tcommand:$command\n" - if syst($command); - -sub syst{ - system(@_)/256; -} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/metrics.c b/ExternalLibs/libvorbis-1.3.1/vq/metrics.c deleted file mode 100644 index 32d5163..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/metrics.c +++ /dev/null @@ -1,295 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: function calls to collect codebook metrics - last mod: $Id: metrics.c 16037 2009-05-26 21:10:58Z xiphmont $ - - ********************************************************************/ - - -#include -#include -#include -#include "bookutil.h" - -/* collect the following metrics: - - mean and mean squared amplitude - mean and mean squared error - mean and mean squared error (per sample) by entry - worst case fit by entry - entry cell size - hits by entry - total bits - total samples - (average bits per sample)*/ - - -/* set up metrics */ - -float meanamplitude_acc=0.f; -float meanamplitudesq_acc=0.f; -float meanerror_acc=0.f; -float meanerrorsq_acc=0.f; - -float **histogram=NULL; -float **histogram_error=NULL; -float **histogram_errorsq=NULL; -float **histogram_hi=NULL; -float **histogram_lo=NULL; -float bits=0.f; -float count=0.f; - -static float *_now(codebook *c, int i){ - return c->valuelist+i*c->c->dim; -} - -int books=0; - -void process_preprocess(codebook **bs,char *basename){ - int i; - while(bs[books])books++; - - if(books){ - histogram=_ogg_calloc(books,sizeof(float *)); - histogram_error=_ogg_calloc(books,sizeof(float *)); - histogram_errorsq=_ogg_calloc(books,sizeof(float *)); - histogram_hi=_ogg_calloc(books,sizeof(float *)); - histogram_lo=_ogg_calloc(books,sizeof(float *)); - }else{ - fprintf(stderr,"Specify at least one codebook\n"); - exit(1); - } - - for(i=0;ientries,sizeof(float)); - histogram_error[i]=_ogg_calloc(b->entries*b->dim,sizeof(float)); - histogram_errorsq[i]=_ogg_calloc(b->entries*b->dim,sizeof(float)); - histogram_hi[i]=_ogg_calloc(b->entries*b->dim,sizeof(float)); - histogram_lo[i]=_ogg_calloc(b->entries*b->dim,sizeof(float)); - } -} - -static float _dist(int el,float *a, float *b){ - int i; - float acc=0.f; - for(i=0;ic->entries;j++){ - if(c->c->lengthlist[j]>0){ - float localmin=-1.; - for(k=0;kc->entries;k++){ - if(c->c->lengthlist[k]>0){ - float this=_dist(c->c->dim,_now(c,j),_now(c,k)); - if(j!=k && - (localmin==-1 || thismax)max=localmin; - mean+=sqrt(localmin); - meansq+=localmin; - total++; - } - } - - fprintf(stderr,"\tminimum cell spacing (closest side): %g\n",sqrt(min)); - fprintf(stderr,"\tmaximum cell spacing (closest side): %g\n",sqrt(max)); - fprintf(stderr,"\tmean closest side spacing: %g\n",mean/total); - fprintf(stderr,"\tmean sq closest side spacing: %g\n",sqrt(meansq/total)); -} - -void process_postprocess(codebook **bs,char *basename){ - int i,k,book; - char *buffer=alloca(strlen(basename)+80); - - fprintf(stderr,"Done. Processed %ld data points:\n\n", - (long)count); - - fprintf(stderr,"Global statistics:******************\n\n"); - - fprintf(stderr,"\ttotal samples: %ld\n",(long)count); - fprintf(stderr,"\ttotal bits required to code: %ld\n",(long)bits); - fprintf(stderr,"\taverage bits per sample: %g\n\n",bits/count); - - fprintf(stderr,"\tmean sample amplitude: %g\n", - meanamplitude_acc/count); - fprintf(stderr,"\tmean squared sample amplitude: %g\n\n", - sqrt(meanamplitudesq_acc/count)); - - fprintf(stderr,"\tmean code error: %g\n", - meanerror_acc/count); - fprintf(stderr,"\tmean squared code error: %g\n\n", - sqrt(meanerrorsq_acc/count)); - - for(book=0;bookc->entries; - int dim=b->c->dim; - - fprintf(stderr,"Book %d statistics:------------------\n",book); - - cell_spacing(b); - - sprintf(buffer,"%s-%d-mse.m",basename,book); - out=fopen(buffer,"w"); - if(!out){ - fprintf(stderr,"Could not open file %s for writing\n",buffer); - exit(1); - } - - for(i=0;ivaluelist+i*dim)[k], - sqrt((histogram_errorsq[book]+i*dim)[k]/histogram[book][i])); - } - } - fclose(out); - - sprintf(buffer,"%s-%d-me.m",basename,book); - out=fopen(buffer,"w"); - if(!out){ - fprintf(stderr,"Could not open file %s for writing\n",buffer); - exit(1); - } - - for(i=0;ivaluelist+i*dim)[k], - (histogram_error[book]+i*dim)[k]/histogram[book][i]); - } - } - fclose(out); - - sprintf(buffer,"%s-%d-worst.m",basename,book); - out=fopen(buffer,"w"); - if(!out){ - fprintf(stderr,"Could not open file %s for writing\n",buffer); - exit(1); - } - - for(i=0;ivaluelist+i*dim)[k], - (b->valuelist+i*dim)[k]+(histogram_lo[book]+i*dim)[k], - (b->valuelist+i*dim)[k]+(histogram_hi[book]+i*dim)[k]); - } - } - fclose(out); - } -} - -float process_one(codebook *b,int book,float *a,int dim,int step,int addmul, - float base){ - int j,entry; - float amplitude=0.f; - - if(book==0){ - float last=base; - for(j=0;jc->q_sequencep?last:0); - meanamplitude_acc+=fabs(amplitude); - meanamplitudesq_acc+=amplitude*amplitude; - count++; - last=a[j*step]; - } - } - - if(b->c->q_sequencep){ - float temp; - for(j=0;jerror) - histogram_lo[book][entry*dim+j]=error; - } - return base; -} - - -void process_vector(codebook **bs,int *addmul,int inter,float *a,int n){ - int bi; - int i; - - for(bi=0;bidim; - float base=0.f; - - if(inter){ - for(i=0;i.vqh [ +|* ]... \n" - " datafile.vqd [datafile.vqd]...\n\n" - " data can be taken on stdin. -i indicates interleaved coding.\n" - " Output goes to output files:\n" - " basename-me.m: gnuplot: mean error by entry value\n" - " basename-mse.m: gnuplot: mean square error by entry value\n" - " basename-worst.m: gnuplot: worst error by entry value\n" - " basename-distance.m: gnuplot file showing distance probability\n" - "\n"); - -} diff --git a/ExternalLibs/libvorbis-1.3.1/vq/vqgen.c b/ExternalLibs/libvorbis-1.3.1/vq/vqgen.c deleted file mode 100644 index 49aa63f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/vqgen.c +++ /dev/null @@ -1,567 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: train a VQ codebook - last mod: $Id: vqgen.c 16037 2009-05-26 21:10:58Z xiphmont $ - - ********************************************************************/ - -/* This code is *not* part of libvorbis. It is used to generate - trained codebooks offline and then spit the results into a - pregenerated codebook that is compiled into libvorbis. It is an - expensive (but good) algorithm. Run it on big iron. */ - -/* There are so many optimizations to explore in *both* stages that - considering the undertaking is almost withering. For now, we brute - force it all */ - -#include -#include -#include -#include - -#include "vqgen.h" -#include "bookutil.h" - -/* Codebook generation happens in two steps: - - 1) Train the codebook with data collected from the encoder: We use - one of a few error metrics (which represent the distance between a - given data point and a candidate point in the training set) to - divide the training set up into cells representing roughly equal - probability of occurring. - - 2) Generate the codebook and auxiliary data from the trained data set -*/ - -/* Codebook training **************************************************** - * - * The basic idea here is that a VQ codebook is like an m-dimensional - * foam with n bubbles. The bubbles compete for space/volume and are - * 'pressurized' [biased] according to some metric. The basic alg - * iterates through allowing the bubbles to compete for space until - * they converge (if the damping is dome properly) on a steady-state - * solution. Individual input points, collected from libvorbis, are - * used to train the algorithm monte-carlo style. */ - -/* internal helpers *****************************************************/ -#define vN(data,i) (data+v->elements*i) - -/* default metric; squared 'distance' from desired value. */ -float _dist(vqgen *v,float *a, float *b){ - int i; - int el=v->elements; - float acc=0.f; - for(i=0;ientries;i++) - memcpy(_now(v,i),_point(v,i),sizeof(float)*v->elements); - v->seeded=1; -} - -int directdsort(const void *a, const void *b){ - float av=*((float *)a); - float bv=*((float *)b); - return (avbv); -} - -void vqgen_cellmetric(vqgen *v){ - int j,k; - float min=-1.f,max=-1.f,mean=0.f,acc=0.f; - long dup=0,unused=0; - #ifdef NOISY - int i; - char buff[80]; - float spacings[v->entries]; - int count=0; - FILE *cells; - sprintf(buff,"cellspace%d.m",v->it); - cells=fopen(buff,"w"); -#endif - - /* minimum, maximum, cell spacing */ - for(j=0;jentries;j++){ - float localmin=-1.; - - for(k=0;kentries;k++){ - if(j!=k){ - float this=_dist(v,_now(v,j),_now(v,k)); - if(this>0){ - if(v->assigned[k] && (localmin==-1 || thisentries)continue; - - if(v->assigned[j]==0){ - unused++; - continue; - } - - localmin=v->max[j]+localmin/2; /* this gives us rough diameter */ - if(min==-1 || localminmax)max=localmin; - mean+=localmin; - acc++; -#ifdef NOISY - spacings[count++]=localmin; -#endif - } - - fprintf(stderr,"cell diameter: %.03g::%.03g::%.03g (%ld unused/%ld dup)\n", - min,mean/acc,max,unused,dup); - -#ifdef NOISY - qsort(spacings,count,sizeof(float),directdsort); - for(i=0;iquant)-1); - - int j,k; - - mindel=maxdel=_now(v,0)[0]; - - for(j=0;jentries;j++){ - float last=0.f; - for(k=0;kelements;k++){ - if(mindel>_now(v,j)[k]-last)mindel=_now(v,j)[k]-last; - if(maxdel<_now(v,j)[k]-last)maxdel=_now(v,j)[k]-last; - if(q->sequencep)last=_now(v,j)[k]; - } - } - - - /* first find the basic delta amount from the maximum span to be - encoded. Loosen the delta slightly to allow for additional error - during sequence quantization */ - - delta=(maxdel-mindel)/((1<quant)-1.5f); - - q->min=_float32_pack(mindel); - q->delta=_float32_pack(delta); - - mindel=_float32_unpack(q->min); - delta=_float32_unpack(q->delta); - - for(j=0;jentries;j++){ - float last=0; - for(k=0;kelements;k++){ - float val=_now(v,j)[k]; - float now=rint((val-last-mindel)/delta); - - _now(v,j)[k]=now; - if(now<0){ - /* be paranoid; this should be impossible */ - fprintf(stderr,"fault; quantized value<0\n"); - exit(1); - } - - if(now>maxquant){ - /* be paranoid; this should be impossible */ - fprintf(stderr,"fault; quantized value>max\n"); - exit(1); - } - if(q->sequencep)last=(now*delta)+mindel+last; - } - } -} - -/* much easier :-). Unlike in the codebook, we don't un-log log - scales; we just make sure they're properly offset. */ -void vqgen_unquantize(vqgen *v,quant_meta *q){ - long j,k; - float mindel=_float32_unpack(q->min); - float delta=_float32_unpack(q->delta); - - for(j=0;jentries;j++){ - float last=0.f; - for(k=0;kelements;k++){ - float now=_now(v,j)[k]; - now=fabs(now)*delta+last+mindel; - if(q->sequencep)last=now; - _now(v,j)[k]=now; - } - } -} - -void vqgen_init(vqgen *v,int elements,int aux,int entries,float mindist, - float (*metric)(vqgen *,float *, float *), - float *(*weight)(vqgen *,float *),int centroid){ - memset(v,0,sizeof(vqgen)); - - v->centroid=centroid; - v->elements=elements; - v->aux=aux; - v->mindist=mindist; - v->allocated=32768; - v->pointlist=_ogg_malloc(v->allocated*(v->elements+v->aux)*sizeof(float)); - - v->entries=entries; - v->entrylist=_ogg_malloc(v->entries*v->elements*sizeof(float)); - v->assigned=_ogg_malloc(v->entries*sizeof(long)); - v->bias=_ogg_calloc(v->entries,sizeof(float)); - v->max=_ogg_calloc(v->entries,sizeof(float)); - if(metric) - v->metric_func=metric; - else - v->metric_func=_dist; - if(weight) - v->weight_func=weight; - else - v->weight_func=_weight_null; - - v->asciipoints=tmpfile(); - -} - -void vqgen_addpoint(vqgen *v, float *p,float *a){ - int k; - for(k=0;kelements;k++) - fprintf(v->asciipoints,"%.12g\n",p[k]); - for(k=0;kaux;k++) - fprintf(v->asciipoints,"%.12g\n",a[k]); - - if(v->points>=v->allocated){ - v->allocated*=2; - v->pointlist=_ogg_realloc(v->pointlist,v->allocated*(v->elements+v->aux)* - sizeof(float)); - } - - memcpy(_point(v,v->points),p,sizeof(float)*v->elements); - if(v->aux)memcpy(_point(v,v->points)+v->elements,a,sizeof(float)*v->aux); - - /* quantize to the density mesh if it's selected */ - if(v->mindist>0.f){ - /* quantize to the mesh */ - for(k=0;kelements+v->aux;k++) - _point(v,v->points)[k]= - rint(_point(v,v->points)[k]/v->mindist)*v->mindist; - } - v->points++; - if(!(v->points&0xff))spinnit("loading... ",v->points); -} - -/* yes, not threadsafe. These utils aren't */ -static int sortit=0; -static int sortsize=0; -static int meshcomp(const void *a,const void *b){ - if(((sortit++)&0xfff)==0)spinnit("sorting mesh...",sortit); - return(memcmp(a,b,sortsize)); -} - -void vqgen_sortmesh(vqgen *v){ - sortit=0; - if(v->mindist>0.f){ - long i,march=1; - - /* sort to make uniqueness detection trivial */ - sortsize=(v->elements+v->aux)*sizeof(float); - qsort(v->pointlist,v->points,sortsize,meshcomp); - - /* now march through and eliminate dupes */ - for(i=1;ipoints;i++){ - if(memcmp(_point(v,i),_point(v,i-1),sortsize)){ - /* a new, unique entry. march it down */ - if(i>march)memcpy(_point(v,march),_point(v,i),sortsize); - march++; - } - spinnit("eliminating density... ",v->points-i); - } - - /* we're done */ - fprintf(stderr,"\r%ld training points remining out of %ld" - " after density mesh (%ld%%)\n",march,v->points,march*100/v->points); - v->points=march; - - } - v->sorted=1; -} - -float vqgen_iterate(vqgen *v,int biasp){ - long i,j,k; - - float fdesired; - long desired; - long desired2; - - float asserror=0.f; - float meterror=0.f; - float *new; - float *new2; - long *nearcount; - float *nearbias; - #ifdef NOISY - char buff[80]; - FILE *assig; - FILE *bias; - FILE *cells; - sprintf(buff,"cells%d.m",v->it); - cells=fopen(buff,"w"); - sprintf(buff,"assig%d.m",v->it); - assig=fopen(buff,"w"); - sprintf(buff,"bias%d.m",v->it); - bias=fopen(buff,"w"); - #endif - - - if(v->entries<2){ - fprintf(stderr,"generation requires at least two entries\n"); - exit(1); - } - - if(!v->sorted)vqgen_sortmesh(v); - if(!v->seeded)_vqgen_seed(v); - - fdesired=(float)v->points/v->entries; - desired=fdesired; - desired2=desired*2; - new=_ogg_malloc(sizeof(float)*v->entries*v->elements); - new2=_ogg_malloc(sizeof(float)*v->entries*v->elements); - nearcount=_ogg_malloc(v->entries*sizeof(long)); - nearbias=_ogg_malloc(v->entries*desired2*sizeof(float)); - - /* fill in nearest points for entry biasing */ - /*memset(v->bias,0,sizeof(float)*v->entries);*/ - memset(nearcount,0,sizeof(long)*v->entries); - memset(v->assigned,0,sizeof(long)*v->entries); - if(biasp){ - for(i=0;ipoints;i++){ - float *ppt=v->weight_func(v,_point(v,i)); - float firstmetric=v->metric_func(v,_now(v,0),ppt)+v->bias[0]; - float secondmetric=v->metric_func(v,_now(v,1),ppt)+v->bias[1]; - long firstentry=0; - long secondentry=1; - - if(!(i&0xff))spinnit("biasing... ",v->points+v->points+v->entries-i); - - if(firstmetric>secondmetric){ - float temp=firstmetric; - firstmetric=secondmetric; - secondmetric=temp; - firstentry=1; - secondentry=0; - } - - for(j=2;jentries;j++){ - float thismetric=v->metric_func(v,_now(v,j),ppt)+v->bias[j]; - if(thismetricentries;j++){ - - float thismetric,localmetric; - float *nearbiasptr=nearbias+desired2*j; - long k=nearcount[j]; - - localmetric=v->metric_func(v,_now(v,j),ppt); - /* 'thismetric' is to be the bias value necessary in the current - arrangement for entry j to capture point i */ - if(firstentry==j){ - /* use the secondary entry as the threshhold */ - thismetric=secondmetric-localmetric; - }else{ - /* use the primary entry as the threshhold */ - thismetric=firstmetric-localmetric; - } - - /* support the idea of 'minimum distance'... if we want the - cells in a codebook to be roughly some minimum size (as with - the low resolution residue books) */ - - /* a cute two-stage delayed sorting hack */ - if(kpoints+v->points+v->entries-i); - qsort(nearbiasptr,desired,sizeof(float),directdsort); - } - - }else if(thismetric>nearbiasptr[desired-1]){ - nearbiasptr[k]=thismetric; - k++; - if(k==desired2){ - spinnit("biasing... ",v->points+v->points+v->entries-i); - qsort(nearbiasptr,desired2,sizeof(float),directdsort); - k=desired; - } - } - nearcount[j]=k; - } - } - - /* inflate/deflate */ - - for(i=0;ientries;i++){ - float *nearbiasptr=nearbias+desired2*i; - - spinnit("biasing... ",v->points+v->entries-i); - - /* due to the delayed sorting, we likely need to finish it off....*/ - if(nearcount[i]>desired) - qsort(nearbiasptr,nearcount[i],sizeof(float),directdsort); - - v->bias[i]=nearbiasptr[desired-1]; - - } - }else{ - memset(v->bias,0,v->entries*sizeof(float)); - } - - /* Now assign with new bias and find new midpoints */ - for(i=0;ipoints;i++){ - float *ppt=v->weight_func(v,_point(v,i)); - float firstmetric=v->metric_func(v,_now(v,0),ppt)+v->bias[0]; - long firstentry=0; - - if(!(i&0xff))spinnit("centering... ",v->points-i); - - for(j=0;jentries;j++){ - float thismetric=v->metric_func(v,_now(v,j),ppt)+v->bias[j]; - if(thismetricbias[j]; - meterror+=firstmetric; - - if(v->centroid==0){ - /* set up midpoints for next iter */ - if(v->assigned[j]++){ - for(k=0;kelements;k++) - vN(new,j)[k]+=ppt[k]; - if(firstmetric>v->max[j])v->max[j]=firstmetric; - }else{ - for(k=0;kelements;k++) - vN(new,j)[k]=ppt[k]; - v->max[j]=firstmetric; - } - }else{ - /* centroid */ - if(v->assigned[j]++){ - for(k=0;kelements;k++){ - if(vN(new,j)[k]>ppt[k])vN(new,j)[k]=ppt[k]; - if(vN(new2,j)[k]v->max[firstentry])v->max[j]=firstmetric; - }else{ - for(k=0;kelements;k++){ - vN(new,j)[k]=ppt[k]; - vN(new2,j)[k]=ppt[k]; - } - v->max[firstentry]=firstmetric; - } - } - } - - /* assign midpoints */ - - for(j=0;jentries;j++){ -#ifdef NOISY - fprintf(assig,"%ld\n",v->assigned[j]); - fprintf(bias,"%g\n",v->bias[j]); -#endif - asserror+=fabs(v->assigned[j]-fdesired); - if(v->assigned[j]){ - if(v->centroid==0){ - for(k=0;kelements;k++) - _now(v,j)[k]=vN(new,j)[k]/v->assigned[j]; - }else{ - for(k=0;kelements;k++) - _now(v,j)[k]=(vN(new,j)[k]+vN(new2,j)[k])/2.f; - } - } - } - - asserror/=(v->entries*fdesired); - - fprintf(stderr,"Pass #%d... ",v->it); - fprintf(stderr,": dist %g(%g) metric error=%g \n", - asserror,fdesired,meterror/v->points); - v->it++; - - free(new); - free(nearcount); - free(nearbias); -#ifdef NOISY - fclose(assig); - fclose(bias); - fclose(cells); -#endif - return(asserror); -} - diff --git a/ExternalLibs/libvorbis-1.3.1/vq/vqgen.h b/ExternalLibs/libvorbis-1.3.1/vq/vqgen.h deleted file mode 100644 index 9076513..0000000 --- a/ExternalLibs/libvorbis-1.3.1/vq/vqgen.h +++ /dev/null @@ -1,85 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * - * by the Xiph.Org Foundation http://www.xiph.org/ * - * * - ******************************************************************** - - function: build a VQ codebook - last mod: $Id: vqgen.h 16037 2009-05-26 21:10:58Z xiphmont $ - - ********************************************************************/ - -#ifndef _VQGEN_H_ -#define _VQGEN_H_ - -typedef struct vqgen{ - int seeded; - int sorted; - - int it; - int elements; - - int aux; - float mindist; - int centroid; - - /* point cache */ - float *pointlist; - long points; - long allocated; - - /* entries */ - float *entrylist; - long *assigned; - float *bias; - long entries; - float *max; - - float (*metric_func) (struct vqgen *v,float *entry,float *point); - float *(*weight_func) (struct vqgen *v,float *point); - - FILE *asciipoints; -} vqgen; - -typedef struct { - long min; /* packed 24 bit float */ - long delta; /* packed 24 bit float */ - int quant; /* 0 < quant <= 16 */ - int sequencep; /* bitflag */ -} quant_meta; - -static inline float *_point(vqgen *v,long ptr){ - return v->pointlist+((v->elements+v->aux)*ptr); -} - -static inline float *_aux(vqgen *v,long ptr){ - return _point(v,ptr)+v->aux; -} - -static inline float *_now(vqgen *v,long ptr){ - return v->entrylist+(v->elements*ptr); -} - -extern void vqgen_init(vqgen *v, - int elements,int aux,int entries,float mindist, - float (*metric)(vqgen *,float *, float *), - float *(*weight)(vqgen *,float *),int centroid); -extern void vqgen_addpoint(vqgen *v, float *p,float *aux); - -extern float vqgen_iterate(vqgen *v,int biasp); -extern void vqgen_unquantize(vqgen *v,quant_meta *q); -extern void vqgen_quantize(vqgen *v,quant_meta *q); -extern void vqgen_cellmetric(vqgen *v); - -#endif - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/README b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/README deleted file mode 100644 index 3e3ea55..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/README +++ /dev/null @@ -1,16 +0,0 @@ -libvorbis has libogg as a dependency, you need to have libogg -compiled beforehand. - -Lets say you have libogg and libvorbis in the same directory: - -libogg-1.1.3 -libvorbis-1.2.0 - -Because there is no automatic library detection you have to, -either: - -1. Rename libogg-1.1.3 to libogg - -2. Open libogg.vsprops with a text editor (even notepad.exe -will suffice) and see if LIBOGG_VERSION is set to the correct -version, in this case "1.1.3" diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libogg.vsprops b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libogg.vsprops deleted file mode 100644 index dca1208..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libogg.vsprops +++ /dev/null @@ -1,19 +0,0 @@ - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_dynamic.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_dynamic.vcproj deleted file mode 100644 index 3e81166..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_dynamic.vcproj +++ /dev/null @@ -1,348 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_static.vcproj deleted file mode 100644 index 07e1ff3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbis/libvorbis_static.vcproj +++ /dev/null @@ -1,336 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_dynamic.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_dynamic.vcproj deleted file mode 100644 index 54acf7d..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_dynamic.vcproj +++ /dev/null @@ -1,108 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_static.vcproj deleted file mode 100644 index dfbcc16..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/libvorbisfile/libvorbisfile_static.vcproj +++ /dev/null @@ -1,96 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbis_dynamic.sln b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbis_dynamic.sln deleted file mode 100644 index 1426161..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbis_dynamic.sln +++ /dev/null @@ -1,92 +0,0 @@ - -Microsoft Visual Studio Solution File, Format Version 9.00 -# Visual Studio 2005 -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libvorbisfile", "libvorbisfile\libvorbisfile_dynamic.vcproj", "{CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libvorbis", "libvorbis\libvorbis_dynamic.vcproj", "{3A214E06-B95E-4D61-A291-1F8DF2EC10FD}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "vorbisdec", "vorbisdec\vorbisdec_dynamic.vcproj", "{5833EEA1-1068-431F-A6E5-316E7DC5D90A}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "vorbisenc", "vorbisenc\vorbisenc_dynamic.vcproj", "{E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}" -EndProject -Global - GlobalSection(SolutionConfigurationPlatforms) = preSolution - Debug|Win32 = Debug|Win32 - Debug|x64 = Debug|x64 - Release_SSE|Win32 = Release_SSE|Win32 - Release_SSE|x64 = Release_SSE|x64 - Release_SSE2|Win32 = Release_SSE2|Win32 - Release_SSE2|x64 = Release_SSE2|x64 - Release|Win32 = Release|Win32 - Release|x64 = Release|x64 - EndGlobalSection - GlobalSection(ProjectConfigurationPlatforms) = postSolution - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Debug|Win32.ActiveCfg = Debug|Win32 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Debug|Win32.Build.0 = Debug|Win32 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Debug|x64.ActiveCfg = Debug|x64 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Debug|x64.Build.0 = Debug|x64 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Release_SSE|Win32.ActiveCfg = Release|Win32 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Release_SSE|Win32.Build.0 = Release|Win32 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Release_SSE|x64.ActiveCfg = Release_SSE|x64 - {CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}.Release_SSE|x64.Build.0 = Release_SSE|x64 - 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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbisenc/vorbisenc_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbisenc/vorbisenc_static.vcproj deleted file mode 100644 index 8a0d6fb..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2005/vorbisenc/vorbisenc_static.vcproj +++ /dev/null @@ -1,106 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/README b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/README deleted file mode 100644 index 3e3ea55..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/README +++ /dev/null @@ -1,16 +0,0 @@ -libvorbis has libogg as a dependency, you need to have libogg -compiled beforehand. - -Lets say you have libogg and libvorbis in the same directory: - -libogg-1.1.3 -libvorbis-1.2.0 - -Because there is no automatic library detection you have to, -either: - -1. Rename libogg-1.1.3 to libogg - -2. Open libogg.vsprops with a text editor (even notepad.exe -will suffice) and see if LIBOGG_VERSION is set to the correct -version, in this case "1.1.3" diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libogg.vsprops b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libogg.vsprops deleted file mode 100644 index 807b74a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libogg.vsprops +++ /dev/null @@ -1,19 +0,0 @@ - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_dynamic.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_dynamic.vcproj deleted file mode 100644 index 72fba16..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_dynamic.vcproj +++ /dev/null @@ -1,348 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_static.vcproj deleted file mode 100644 index ed72c88..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbis/libvorbis_static.vcproj +++ /dev/null @@ -1,336 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_dynamic.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_dynamic.vcproj deleted file mode 100644 index 98cfd88..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_dynamic.vcproj +++ /dev/null @@ -1,108 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_static.vcproj deleted file mode 100644 index f36ed21..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/libvorbisfile/libvorbisfile_static.vcproj +++ /dev/null @@ -1,96 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbis_dynamic.sln b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbis_dynamic.sln deleted file mode 100644 index d3e846a..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbis_dynamic.sln +++ /dev/null @@ -1,92 +0,0 @@ - -Microsoft Visual Studio Solution File, Format Version 10.00 -# Visual Studio 2008 -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libvorbisfile", "libvorbisfile\libvorbisfile_dynamic.vcproj", "{CEBDE98B-A6AA-46E6-BC79-FAAF823DB9EC}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libvorbis", "libvorbis\libvorbis_dynamic.vcproj", "{3A214E06-B95E-4D61-A291-1F8DF2EC10FD}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "vorbisdec", "vorbisdec\vorbisdec_dynamic.vcproj", "{5833EEA1-1068-431F-A6E5-316E7DC5D90A}" -EndProject -Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "vorbisenc", "vorbisenc\vorbisenc_dynamic.vcproj", "{E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}" -EndProject -Global - 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{E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}.Release_SSE2|x64.Build.0 = Release_SSE2|x64 - {E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}.Release|Win32.ActiveCfg = Release|Win32 - {E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}.Release|Win32.Build.0 = Release|Win32 - {E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}.Release|x64.ActiveCfg = Release|x64 - {E48B6A8B-F7FE-4DA8-8248-E64DBAC4F56C}.Release|x64.Build.0 = Release|x64 - EndGlobalSection - GlobalSection(SolutionProperties) = preSolution - HideSolutionNode = FALSE - EndGlobalSection -EndGlobal diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisdec/vorbisdec_dynamic.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisdec/vorbisdec_dynamic.vcproj deleted file mode 100644 index fe945b3..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisdec/vorbisdec_dynamic.vcproj +++ /dev/null @@ -1,106 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisenc/vorbisenc_static.vcproj b/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisenc/vorbisenc_static.vcproj deleted file mode 100644 index f45847e..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/VS2008/vorbisenc/vorbisenc_static.vcproj +++ /dev/null @@ -1,106 +0,0 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/vorbis.def b/ExternalLibs/libvorbis-1.3.1/win32/vorbis.def deleted file mode 100644 index f397283..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/vorbis.def +++ /dev/null @@ -1,59 +0,0 @@ -; -; $Id: vorbis.def 16335 2009-07-25 22:52:38Z cristianadam $ -; -LIBRARY -EXPORTS -_floor_P -_mapping_P -_residue_P -; -vorbis_info_init -vorbis_info_clear -vorbis_info_blocksize -; -vorbis_comment_init -vorbis_comment_add -vorbis_comment_add_tag -vorbis_comment_query -vorbis_comment_query_count -vorbis_comment_clear -; -vorbis_block_init -vorbis_block_clear -vorbis_dsp_clear -vorbis_granule_time -; -vorbis_analysis_init -vorbis_commentheader_out -vorbis_analysis_headerout -vorbis_analysis_buffer -vorbis_analysis_wrote -vorbis_analysis_blockout -vorbis_analysis -vorbis_bitrate_addblock -vorbis_bitrate_flushpacket -; -vorbis_synthesis_headerin -vorbis_synthesis_init -vorbis_synthesis_restart -vorbis_synthesis -vorbis_synthesis_trackonly -vorbis_synthesis_blockin -vorbis_synthesis_pcmout -vorbis_synthesis_lapout -vorbis_synthesis_read -vorbis_packet_blocksize -vorbis_synthesis_halfrate -vorbis_synthesis_halfrate_p -vorbis_synthesis_idheader -; -vorbis_window -;_analysis_output_always -vorbis_encode_init -vorbis_encode_setup_managed -vorbis_encode_setup_vbr -vorbis_encode_init_vbr -vorbis_encode_setup_init -vorbis_encode_ctl -; -vorbis_version_string diff --git a/ExternalLibs/libvorbis-1.3.1/win32/vorbisenc.def b/ExternalLibs/libvorbis-1.3.1/win32/vorbisenc.def deleted file mode 100644 index d3e562f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/vorbisenc.def +++ /dev/null @@ -1,13 +0,0 @@ -; -; $Id: vorbisenc.def 7187 2004-07-20 07:24:27Z xiphmont $ -; -LIBRARY - -EXPORTS -vorbis_encode_init -vorbis_encode_setup_managed -vorbis_encode_setup_vbr -vorbis_encode_init_vbr -vorbis_encode_setup_init -vorbis_encode_ctl - diff --git a/ExternalLibs/libvorbis-1.3.1/win32/vorbisfile.def b/ExternalLibs/libvorbis-1.3.1/win32/vorbisfile.def deleted file mode 100644 index 91f243f..0000000 --- a/ExternalLibs/libvorbis-1.3.1/win32/vorbisfile.def +++ /dev/null @@ -1,42 +0,0 @@ -; -; vorbisfile.def -; -; last modified: $Id: vorbisfile.def 15566 2008-12-08 09:07:12Z conrad $ -; -LIBRARY -EXPORTS -ov_clear -ov_open -ov_open_callbacks -ov_bitrate -ov_bitrate_instant -ov_streams -ov_seekable -ov_serialnumber -ov_raw_total -ov_pcm_total -ov_time_total -ov_raw_seek -ov_pcm_seek -ov_pcm_seek_page -ov_time_seek -ov_time_seek_page -ov_raw_seek_lap -ov_pcm_seek_lap -ov_pcm_seek_page_lap -ov_time_seek_lap -ov_time_seek_page_lap -ov_raw_tell -ov_pcm_tell -ov_time_tell -ov_info -ov_comment -ov_read -ov_read_float -ov_test -ov_test_callbacks -ov_test_open -ov_crosslap -ov_halfrate -ov_halfrate_p -ov_fopen diff --git a/ExternalLibs/libvorbis-1.3.1/COPYING b/ExternalLibs/libvorbis-1.3.2/COPYING similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/COPYING rename to ExternalLibs/libvorbis-1.3.2/COPYING diff --git a/ExternalLibs/libvorbis-1.3.1/include/Makefile.am b/ExternalLibs/libvorbis-1.3.2/include/Makefile.am similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/Makefile.am rename to ExternalLibs/libvorbis-1.3.2/include/Makefile.am diff --git a/ExternalLibs/libvorbis-1.3.1/include/Makefile.in b/ExternalLibs/libvorbis-1.3.2/include/Makefile.in similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/Makefile.in rename to ExternalLibs/libvorbis-1.3.2/include/Makefile.in diff --git a/ExternalLibs/libvorbis-1.3.1/include/vorbis/Makefile.am b/ExternalLibs/libvorbis-1.3.2/include/vorbis/Makefile.am similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/vorbis/Makefile.am rename to ExternalLibs/libvorbis-1.3.2/include/vorbis/Makefile.am diff --git a/ExternalLibs/libvorbis-1.3.1/include/vorbis/Makefile.in b/ExternalLibs/libvorbis-1.3.2/include/vorbis/Makefile.in similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/vorbis/Makefile.in rename to ExternalLibs/libvorbis-1.3.2/include/vorbis/Makefile.in diff --git a/ExternalLibs/libvorbis-1.3.1/include/vorbis/codec.h b/ExternalLibs/libvorbis-1.3.2/include/vorbis/codec.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/vorbis/codec.h rename to ExternalLibs/libvorbis-1.3.2/include/vorbis/codec.h diff --git a/ExternalLibs/libvorbis-1.3.1/include/vorbis/vorbisenc.h b/ExternalLibs/libvorbis-1.3.2/include/vorbis/vorbisenc.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/include/vorbis/vorbisenc.h rename to ExternalLibs/libvorbis-1.3.2/include/vorbis/vorbisenc.h diff --git a/ExternalLibs/libvorbis-1.3.1/include/vorbis/vorbisfile.h b/ExternalLibs/libvorbis-1.3.2/include/vorbis/vorbisfile.h similarity index 94% rename from ExternalLibs/libvorbis-1.3.1/include/vorbis/vorbisfile.h rename to ExternalLibs/libvorbis-1.3.2/include/vorbis/vorbisfile.h index a865cd0..9271331 100644 --- a/ExternalLibs/libvorbis-1.3.1/include/vorbis/vorbisfile.h +++ b/ExternalLibs/libvorbis-1.3.2/include/vorbis/vorbisfile.h @@ -11,7 +11,7 @@ ******************************************************************** function: stdio-based convenience library for opening/seeking/decoding - last mod: $Id: vorbisfile.h 17021 2010-03-24 09:29:41Z xiphmont $ + last mod: $Id: vorbisfile.h 17182 2010-04-29 03:48:32Z xiphmont $ ********************************************************************/ @@ -147,14 +147,14 @@ typedef struct OggVorbis_File { extern int ov_clear(OggVorbis_File *vf); -extern int ov_fopen(char *path,OggVorbis_File *vf); -extern int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); +extern int ov_fopen(const char *path,OggVorbis_File *vf); +extern int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); extern int ov_open_callbacks(void *datasource, OggVorbis_File *vf, - char *initial, long ibytes, ov_callbacks callbacks); + const char *initial, long ibytes, ov_callbacks callbacks); -extern int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes); +extern int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes); extern int ov_test_callbacks(void *datasource, OggVorbis_File *vf, - char *initial, long ibytes, ov_callbacks callbacks); + const char *initial, long ibytes, ov_callbacks callbacks); extern int ov_test_open(OggVorbis_File *vf); extern long ov_bitrate(OggVorbis_File *vf,int i); diff --git a/ExternalLibs/libvorbis-1.3.1/lib/analysis.c b/ExternalLibs/libvorbis-1.3.2/lib/analysis.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/analysis.c rename to ExternalLibs/libvorbis-1.3.2/lib/analysis.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/backends.h b/ExternalLibs/libvorbis-1.3.2/lib/backends.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/backends.h rename to ExternalLibs/libvorbis-1.3.2/lib/backends.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/barkmel.c b/ExternalLibs/libvorbis-1.3.2/lib/barkmel.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/barkmel.c rename to ExternalLibs/libvorbis-1.3.2/lib/barkmel.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/bitrate.c b/ExternalLibs/libvorbis-1.3.2/lib/bitrate.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/bitrate.c rename to ExternalLibs/libvorbis-1.3.2/lib/bitrate.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/bitrate.h b/ExternalLibs/libvorbis-1.3.2/lib/bitrate.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/bitrate.h rename to ExternalLibs/libvorbis-1.3.2/lib/bitrate.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/block.c b/ExternalLibs/libvorbis-1.3.2/lib/block.c similarity index 94% rename from ExternalLibs/libvorbis-1.3.1/lib/block.c rename to ExternalLibs/libvorbis-1.3.2/lib/block.c index 58f7fc7..eee9abf 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/block.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/block.c @@ -11,7 +11,7 @@ ******************************************************************** function: PCM data vector blocking, windowing and dis/reassembly - last mod: $Id: block.c 16330 2009-07-24 01:58:50Z xiphmont $ + last mod: $Id: block.c 17561 2010-10-23 10:34:24Z xiphmont $ Handle windowing, overlap-add, etc of the PCM vectors. This is made more amusing by Vorbis' current two allowed block sizes. @@ -232,16 +232,17 @@ static int _vds_shared_init(vorbis_dsp_state *v,vorbis_info *vi,int encp){ v->analysisp=1; }else{ /* finish the codebooks */ - if(!ci->fullbooks) + if(!ci->fullbooks){ ci->fullbooks=_ogg_calloc(ci->books,sizeof(*ci->fullbooks)); - for(i=0;ibooks;i++){ - if(ci->book_param[i]==NULL) - goto abort_books; - if(vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i])) - goto abort_books; + for(i=0;ibooks;i++){ + if(ci->book_param[i]==NULL) + goto abort_books; + if(vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i])) + goto abort_books; /* decode codebooks are now standalone after init */ - vorbis_staticbook_destroy(ci->book_param[i]); - ci->book_param[i]=NULL; + vorbis_staticbook_destroy(ci->book_param[i]); + ci->book_param[i]=NULL; + } } } @@ -859,17 +860,32 @@ int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){ if(b->sample_count>v->granulepos){ /* corner case; if this is both the first and last audio page, then spec says the end is cut, not beginning */ + long extra=b->sample_count-vb->granulepos; + + /* we use ogg_int64_t for granule positions because a + uint64 isn't universally available. Unfortunately, + that means granposes can be 'negative' and result in + extra being negative */ + if(extra<0) + extra=0; + if(vb->eofflag){ /* trim the end */ - /* no preceeding granulepos; assume we started at zero (we'd + /* no preceding granulepos; assume we started at zero (we'd have to in a short single-page stream) */ /* granulepos could be -1 due to a seek, but that would result in a long count, not short count */ - v->pcm_current-=(b->sample_count-v->granulepos)>>hs; + /* Guard against corrupt/malicious frames that set EOP and + a backdated granpos; don't rewind more samples than we + actually have */ + if(extra > (v->pcm_current - v->pcm_returned)<pcm_current - v->pcm_returned)<pcm_current-=extra>>hs; }else{ /* trim the beginning */ - v->pcm_returned+=(b->sample_count-v->granulepos)>>hs; + v->pcm_returned+=extra>>hs; if(v->pcm_returned>v->pcm_current) v->pcm_returned=v->pcm_current; } @@ -887,6 +903,20 @@ int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){ if(extra) if(vb->eofflag){ /* partial last frame. Strip the extra samples off */ + + /* Guard against corrupt/malicious frames that set EOP and + a backdated granpos; don't rewind more samples than we + actually have */ + if(extra > (v->pcm_current - v->pcm_returned)<pcm_current - v->pcm_returned)<pcm_current-=extra>>hs; } /* else {Shouldn't happen *unless* the bitstream is out of spec. Either way, believe the bitstream } */ diff --git a/ExternalLibs/libvorbis-1.3.1/lib/books/coupled/res_books_51.h b/ExternalLibs/libvorbis-1.3.2/lib/books/coupled/res_books_51.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/books/coupled/res_books_51.h rename to ExternalLibs/libvorbis-1.3.2/lib/books/coupled/res_books_51.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/books/coupled/res_books_stereo.h b/ExternalLibs/libvorbis-1.3.2/lib/books/coupled/res_books_stereo.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/books/coupled/res_books_stereo.h rename to ExternalLibs/libvorbis-1.3.2/lib/books/coupled/res_books_stereo.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/books/floor/floor_books.h b/ExternalLibs/libvorbis-1.3.2/lib/books/floor/floor_books.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/books/floor/floor_books.h rename to ExternalLibs/libvorbis-1.3.2/lib/books/floor/floor_books.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/books/uncoupled/res_books_uncoupled.h b/ExternalLibs/libvorbis-1.3.2/lib/books/uncoupled/res_books_uncoupled.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/books/uncoupled/res_books_uncoupled.h rename to ExternalLibs/libvorbis-1.3.2/lib/books/uncoupled/res_books_uncoupled.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/codebook.c b/ExternalLibs/libvorbis-1.3.2/lib/codebook.c similarity index 95% rename from ExternalLibs/libvorbis-1.3.1/lib/codebook.c rename to ExternalLibs/libvorbis-1.3.2/lib/codebook.c index 772eea6..759d7b4 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/codebook.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/codebook.c @@ -11,7 +11,7 @@ ******************************************************************** function: basic codebook pack/unpack/code/decode operations - last mod: $Id: codebook.c 17030 2010-03-25 06:52:55Z xiphmont $ + last mod: $Id: codebook.c 17553 2010-10-21 17:54:26Z tterribe $ ********************************************************************/ @@ -163,12 +163,17 @@ static_codebook *vorbis_staticbook_unpack(oggpack_buffer *opb){ /* codeword ordering.... length ordered or unordered? */ switch((int)oggpack_read(opb,1)){ - case 0: + case 0:{ + long unused; + /* allocated but unused entries? */ + unused=oggpack_read(opb,1); + if((s->entries*(unused?1:5)+7)>>3>opb->storage-oggpack_bytes(opb)) + goto _eofout; /* unordered */ s->lengthlist=_ogg_malloc(sizeof(*s->lengthlist)*s->entries); /* allocated but unused entries? */ - if(oggpack_read(opb,1)){ + if(unused){ /* yes, unused entries */ for(i=0;ientries;i++){ @@ -189,17 +194,23 @@ static_codebook *vorbis_staticbook_unpack(oggpack_buffer *opb){ } break; + } case 1: /* ordered */ { long length=oggpack_read(opb,5)+1; + if(length==0)goto _eofout; s->lengthlist=_ogg_malloc(sizeof(*s->lengthlist)*s->entries); for(i=0;ientries;){ long num=oggpack_read(opb,_ilog(s->entries-i)); if(num==-1)goto _eofout; + if(length>32 || num>s->entries-i || + (num>0 && (num-1)>>(length-1)>1)){ + goto _errout; + } if(length>32)goto _errout; - for(j=0;jentries;j++,i++) + for(j=0;jlengthlist[i]=length; length++; } @@ -237,6 +248,8 @@ static_codebook *vorbis_staticbook_unpack(oggpack_buffer *opb){ } /* quantized values */ + if((quantvals*s->q_quant+7>>3)>opb->storage-oggpack_bytes(opb)) + goto _eofout; s->quantlist=_ogg_malloc(sizeof(*s->quantlist)*quantvals); for(i=0;iquantlist[i]=oggpack_read(opb,s->q_quant); diff --git a/ExternalLibs/libvorbis-1.3.1/lib/codebook.h b/ExternalLibs/libvorbis-1.3.2/lib/codebook.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/codebook.h rename to ExternalLibs/libvorbis-1.3.2/lib/codebook.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/codec_internal.h b/ExternalLibs/libvorbis-1.3.2/lib/codec_internal.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/codec_internal.h rename to ExternalLibs/libvorbis-1.3.2/lib/codec_internal.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/envelope.c b/ExternalLibs/libvorbis-1.3.2/lib/envelope.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/envelope.c rename to ExternalLibs/libvorbis-1.3.2/lib/envelope.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/envelope.h b/ExternalLibs/libvorbis-1.3.2/lib/envelope.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/envelope.h rename to ExternalLibs/libvorbis-1.3.2/lib/envelope.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/floor0.c b/ExternalLibs/libvorbis-1.3.2/lib/floor0.c similarity index 97% rename from ExternalLibs/libvorbis-1.3.1/lib/floor0.c rename to ExternalLibs/libvorbis-1.3.2/lib/floor0.c index 1e8bd30..4c32e91 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/floor0.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/floor0.c @@ -11,7 +11,7 @@ ******************************************************************** function: floor backend 0 implementation - last mod: $Id: floor0.c 16227 2009-07-08 06:58:46Z xiphmont $ + last mod: $Id: floor0.c 17558 2010-10-22 00:24:41Z tterribe $ ********************************************************************/ @@ -91,6 +91,8 @@ static vorbis_info_floor *floor0_unpack (vorbis_info *vi,oggpack_buffer *opb){ for(j=0;jnumbooks;j++){ info->books[j]=oggpack_read(opb,8); if(info->books[j]<0 || info->books[j]>=ci->books)goto err_out; + if(ci->book_param[info->books[j]]->maptype==0)goto err_out; + if(ci->book_param[info->books[j]]->dim<1)goto err_out; } return(info); diff --git a/ExternalLibs/libvorbis-1.3.1/lib/floor1.c b/ExternalLibs/libvorbis-1.3.2/lib/floor1.c similarity index 99% rename from ExternalLibs/libvorbis-1.3.1/lib/floor1.c rename to ExternalLibs/libvorbis-1.3.2/lib/floor1.c index cebb40d..9f3154a 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/floor1.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/floor1.c @@ -11,7 +11,7 @@ ******************************************************************** function: floor backend 1 implementation - last mod: $Id: floor1.c 17079 2010-03-26 06:51:41Z xiphmont $ + last mod: $Id: floor1.c 17555 2010-10-21 18:14:51Z tterribe $ ********************************************************************/ @@ -1035,7 +1035,7 @@ static void *floor1_inverse1(vorbis_block *vb,vorbis_look_floor *in){ } } - fit_value[i]=val+predicted; + fit_value[i]=val+predicted&0x7fff; fit_value[look->loneighbor[i-2]]&=0x7fff; fit_value[look->hineighbor[i-2]]&=0x7fff; @@ -1066,13 +1066,18 @@ static int floor1_inverse2(vorbis_block *vb,vorbis_look_floor *in,void *memo, int hx=0; int lx=0; int ly=fit_value[0]*info->mult; + /* guard lookup against out-of-range values */ + ly=(ly<0?0:ly>255?255:ly); + for(j=1;jposts;j++){ int current=look->forward_index[j]; int hy=fit_value[current]&0x7fff; if(hy==fit_value[current]){ - hy*=info->mult; hx=info->postlist[current]; + hy*=info->mult; + /* guard lookup against out-of-range values */ + hy=(hy<0?0:hy>255?255:hy); render_line(n,lx,hx,ly,hy,out); diff --git a/ExternalLibs/libvorbis-1.3.1/lib/highlevel.h b/ExternalLibs/libvorbis-1.3.2/lib/highlevel.h similarity index 93% rename from ExternalLibs/libvorbis-1.3.1/lib/highlevel.h rename to ExternalLibs/libvorbis-1.3.2/lib/highlevel.h index 07cba61..e38f370 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/highlevel.h +++ b/ExternalLibs/libvorbis-1.3.2/lib/highlevel.h @@ -10,8 +10,8 @@ * * ******************************************************************** - function: highlevel encoder setup struct seperated out for vorbisenc clarity - last mod: $Id: highlevel.h 16995 2010-03-23 03:44:44Z xiphmont $ + function: highlevel encoder setup struct separated out for vorbisenc clarity + last mod: $Id: highlevel.h 17195 2010-05-05 21:49:51Z giles $ ********************************************************************/ diff --git a/ExternalLibs/libvorbis-1.3.1/lib/info.c b/ExternalLibs/libvorbis-1.3.2/lib/info.c similarity index 97% rename from ExternalLibs/libvorbis-1.3.1/lib/info.c rename to ExternalLibs/libvorbis-1.3.2/lib/info.c index e80915a..3932480 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/info.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/info.c @@ -11,7 +11,7 @@ ******************************************************************** function: maintain the info structure, info <-> header packets - last mod: $Id: info.c 17080 2010-03-26 06:59:58Z xiphmont $ + last mod: $Id: info.c 17584 2010-11-01 19:26:16Z xiphmont $ ********************************************************************/ @@ -31,8 +31,8 @@ #include "misc.h" #include "os.h" -#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.1" -#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20100325 (Everywhere)" +#define GENERAL_VENDOR_STRING "Xiph.Org libVorbis 1.3.2" +#define ENCODE_VENDOR_STRING "Xiph.Org libVorbis I 20101101 (Schaufenugget)" /* helpers */ static int ilog2(unsigned int v){ @@ -645,9 +645,18 @@ int vorbis_analysis_headerout(vorbis_dsp_state *v, } double vorbis_granule_time(vorbis_dsp_state *v,ogg_int64_t granulepos){ - if(granulepos>=0) + if(granulepos == -1) return -1; + + /* We're not guaranteed a 64 bit unsigned type everywhere, so we + have to put the unsigned granpo in a signed type. */ + if(granulepos>=0){ return((double)granulepos/v->vi->rate); - return(-1); + }else{ + ogg_int64_t granuleoff=0xffffffff; + granuleoff<<=31; + granuleoff|=0x7ffffffff; + return(((double)granulepos+2+granuleoff+granuleoff)/v->vi->rate); + } } const char *vorbis_version_string(void){ diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lookup.c b/ExternalLibs/libvorbis-1.3.2/lib/lookup.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lookup.c rename to ExternalLibs/libvorbis-1.3.2/lib/lookup.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lookup.h b/ExternalLibs/libvorbis-1.3.2/lib/lookup.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lookup.h rename to ExternalLibs/libvorbis-1.3.2/lib/lookup.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lookup_data.h b/ExternalLibs/libvorbis-1.3.2/lib/lookup_data.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lookup_data.h rename to ExternalLibs/libvorbis-1.3.2/lib/lookup_data.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lookups.pl b/ExternalLibs/libvorbis-1.3.2/lib/lookups.pl old mode 100644 new mode 100755 similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lookups.pl rename to ExternalLibs/libvorbis-1.3.2/lib/lookups.pl diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lpc.c b/ExternalLibs/libvorbis-1.3.2/lib/lpc.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lpc.c rename to ExternalLibs/libvorbis-1.3.2/lib/lpc.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lpc.h b/ExternalLibs/libvorbis-1.3.2/lib/lpc.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lpc.h rename to ExternalLibs/libvorbis-1.3.2/lib/lpc.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lsp.c b/ExternalLibs/libvorbis-1.3.2/lib/lsp.c similarity index 98% rename from ExternalLibs/libvorbis-1.3.1/lib/lsp.c rename to ExternalLibs/libvorbis-1.3.2/lib/lsp.c index caf0003..50031a7 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/lsp.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/lsp.c @@ -11,7 +11,7 @@ ******************************************************************** function: LSP (also called LSF) conversion routines - last mod: $Id: lsp.c 16227 2009-07-08 06:58:46Z xiphmont $ + last mod: $Id: lsp.c 17538 2010-10-15 02:52:29Z tterribe $ The LSP generation code is taken (with minimal modification and a few bugfixes) from "On the Computation of the LSP Frequencies" by @@ -46,7 +46,7 @@ implementation. The float lookup is likely the optimal choice on any machine with an FPU. The integer implementation is *not* fixed point (due to the need for a large dynamic range and thus a - seperately tracked exponent) and thus much more complex than the + separately tracked exponent) and thus much more complex than the relatively simple float implementations. It's mostly for future work on a fully fixed point implementation for processors like the ARM family. */ @@ -81,11 +81,11 @@ void vorbis_lsp_to_curve(float *curve,int *map,int n,int ln,float *lsp,int m, float *ftmp=lsp; int c=m>>1; - do{ + while(c--){ q*=ftmp[0]-w; p*=ftmp[1]-w; ftmp+=2; - }while(--c); + } if(m&1){ /* odd order filter; slightly assymetric */ diff --git a/ExternalLibs/libvorbis-1.3.1/lib/lsp.h b/ExternalLibs/libvorbis-1.3.2/lib/lsp.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/lsp.h rename to ExternalLibs/libvorbis-1.3.2/lib/lsp.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/mapping0.c b/ExternalLibs/libvorbis-1.3.2/lib/mapping0.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/mapping0.c rename to ExternalLibs/libvorbis-1.3.2/lib/mapping0.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/masking.h b/ExternalLibs/libvorbis-1.3.2/lib/masking.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/masking.h rename to ExternalLibs/libvorbis-1.3.2/lib/masking.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/mdct.c b/ExternalLibs/libvorbis-1.3.2/lib/mdct.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/mdct.c rename to ExternalLibs/libvorbis-1.3.2/lib/mdct.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/mdct.h b/ExternalLibs/libvorbis-1.3.2/lib/mdct.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/mdct.h rename to ExternalLibs/libvorbis-1.3.2/lib/mdct.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/misc.h b/ExternalLibs/libvorbis-1.3.2/lib/misc.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/misc.h rename to ExternalLibs/libvorbis-1.3.2/lib/misc.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/floor_all.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/floor_all.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/floor_all.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/floor_all.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/psych_11.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/psych_11.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/psych_11.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/psych_11.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/psych_16.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/psych_16.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/psych_16.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/psych_16.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/psych_44.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/psych_44.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/psych_44.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/psych_44.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/psych_8.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/psych_8.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/psych_8.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/psych_8.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/residue_16.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/residue_16.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/residue_16.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/residue_16.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44p51.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44p51.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44p51.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44p51.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44u.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44u.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/residue_44u.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/residue_44u.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/residue_8.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/residue_8.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/residue_8.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/residue_8.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_11.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_11.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_11.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_11.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_16.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_16.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_16.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_16.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_22.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_22.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_22.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_22.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_32.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_32.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_32.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_32.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44p51.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44p51.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44p51.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44p51.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44u.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44u.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_44u.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_44u.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_8.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_8.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_8.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_8.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/modes/setup_X.h b/ExternalLibs/libvorbis-1.3.2/lib/modes/setup_X.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/modes/setup_X.h rename to ExternalLibs/libvorbis-1.3.2/lib/modes/setup_X.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/os.h b/ExternalLibs/libvorbis-1.3.2/lib/os.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/os.h rename to ExternalLibs/libvorbis-1.3.2/lib/os.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/psy.c b/ExternalLibs/libvorbis-1.3.2/lib/psy.c similarity index 98% rename from ExternalLibs/libvorbis-1.3.1/lib/psy.c rename to ExternalLibs/libvorbis-1.3.2/lib/psy.c index 4a8e81e..9a86151 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/psy.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/psy.c @@ -11,7 +11,7 @@ ******************************************************************** function: psychoacoustics not including preecho - last mod: $Id: psy.c 17077 2010-03-26 06:22:19Z xiphmont $ + last mod: $Id: psy.c 17569 2010-10-26 17:09:47Z xiphmont $ ********************************************************************/ @@ -1160,14 +1160,22 @@ void _vp_couple_quantize_normalize(int blobno, However, this is a temporary patch. by Aoyumi @ 2004/04/18 */ - float derate = (1.0 - de*((float)(j-limit+i) / (float)(n-limit))); - - /* elliptical */ + /*float derate = (1.0 - de*((float)(j-limit+i) / (float)(n-limit))); + /* elliptical if(reM[j]+reA[j]<0){ reM[j] = - (qeM[j] = (fabs(reM[j])+fabs(reA[j]))*derate*derate); }else{ reM[j] = (qeM[j] = (fabs(reM[j])+fabs(reA[j]))*derate*derate); + }*/ + + /* elliptical */ + if(reM[j]+reA[j]<0){ + reM[j] = - (qeM[j] = fabs(reM[j])+fabs(reA[j])); + }else{ + reM[j] = (qeM[j] = fabs(reM[j])+fabs(reA[j])); } + + } reA[j]=qeA[j]=0.f; fA[j]=1; diff --git a/ExternalLibs/libvorbis-1.3.1/lib/psy.h b/ExternalLibs/libvorbis-1.3.2/lib/psy.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/psy.h rename to ExternalLibs/libvorbis-1.3.2/lib/psy.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/psytune.c b/ExternalLibs/libvorbis-1.3.2/lib/psytune.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/psytune.c rename to ExternalLibs/libvorbis-1.3.2/lib/psytune.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/registry.c b/ExternalLibs/libvorbis-1.3.2/lib/registry.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/registry.c rename to ExternalLibs/libvorbis-1.3.2/lib/registry.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/registry.h b/ExternalLibs/libvorbis-1.3.2/lib/registry.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/registry.h rename to ExternalLibs/libvorbis-1.3.2/lib/registry.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/res0.c b/ExternalLibs/libvorbis-1.3.2/lib/res0.c similarity index 99% rename from ExternalLibs/libvorbis-1.3.1/lib/res0.c rename to ExternalLibs/libvorbis-1.3.2/lib/res0.c index 87df765..fa0ad97 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/res0.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/res0.c @@ -11,7 +11,7 @@ ******************************************************************** function: residue backend 0, 1 and 2 implementation - last mod: $Id: res0.c 16962 2010-03-11 07:30:34Z xiphmont $ + last mod: $Id: res0.c 17556 2010-10-21 18:25:19Z tterribe $ ********************************************************************/ @@ -250,6 +250,7 @@ vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){ int entries = ci->book_param[info->groupbook]->entries; int dim = ci->book_param[info->groupbook]->dim; int partvals = 1; + if (dim<1) goto errout; while(dim>0){ partvals *= info->partitions; if(partvals > entries) goto errout; @@ -828,7 +829,7 @@ int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl, if(s==0){ /* fetch the partition word */ int temp=vorbis_book_decode(look->phrasebook,&vb->opb); - if(temp==-1 || temp>info->partvals)goto eopbreak; + if(temp==-1 || temp>=info->partvals)goto eopbreak; partword[l]=look->decodemap[temp]; if(partword[l]==NULL)goto errout; } diff --git a/ExternalLibs/libvorbis-1.3.1/lib/scales.h b/ExternalLibs/libvorbis-1.3.2/lib/scales.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/scales.h rename to ExternalLibs/libvorbis-1.3.2/lib/scales.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/sharedbook.c b/ExternalLibs/libvorbis-1.3.2/lib/sharedbook.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/sharedbook.c rename to ExternalLibs/libvorbis-1.3.2/lib/sharedbook.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/smallft.c b/ExternalLibs/libvorbis-1.3.2/lib/smallft.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/smallft.c rename to ExternalLibs/libvorbis-1.3.2/lib/smallft.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/smallft.h b/ExternalLibs/libvorbis-1.3.2/lib/smallft.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/smallft.h rename to ExternalLibs/libvorbis-1.3.2/lib/smallft.h diff --git a/ExternalLibs/libvorbis-1.3.1/lib/synthesis.c b/ExternalLibs/libvorbis-1.3.2/lib/synthesis.c similarity index 97% rename from ExternalLibs/libvorbis-1.3.1/lib/synthesis.c rename to ExternalLibs/libvorbis-1.3.2/lib/synthesis.c index 5aa1d88..1af211d 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/synthesis.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/synthesis.c @@ -11,7 +11,7 @@ ******************************************************************** function: single-block PCM synthesis - last mod: $Id: synthesis.c 17027 2010-03-25 05:21:20Z xiphmont $ + last mod: $Id: synthesis.c 17474 2010-09-30 03:41:41Z gmaxwell $ ********************************************************************/ @@ -114,6 +114,10 @@ int vorbis_synthesis_trackonly(vorbis_block *vb,ogg_packet *op){ if(mode==-1)return(OV_EBADPACKET); vb->mode=mode; + if(!ci->mode_param[mode]){ + return(OV_EBADPACKET); + } + vb->W=ci->mode_param[mode]->blockflag; if(vb->W){ vb->lW=oggpack_read(opb,1); diff --git a/ExternalLibs/libvorbis-1.3.1/lib/tone.c b/ExternalLibs/libvorbis-1.3.2/lib/tone.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/tone.c rename to ExternalLibs/libvorbis-1.3.2/lib/tone.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/vorbisenc.c b/ExternalLibs/libvorbis-1.3.2/lib/vorbisenc.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/vorbisenc.c rename to ExternalLibs/libvorbis-1.3.2/lib/vorbisenc.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/vorbisfile.c b/ExternalLibs/libvorbis-1.3.2/lib/vorbisfile.c similarity index 95% rename from ExternalLibs/libvorbis-1.3.1/lib/vorbisfile.c rename to ExternalLibs/libvorbis-1.3.2/lib/vorbisfile.c index 3f30cb8..3afbd9d 100644 --- a/ExternalLibs/libvorbis-1.3.1/lib/vorbisfile.c +++ b/ExternalLibs/libvorbis-1.3.2/lib/vorbisfile.c @@ -11,7 +11,7 @@ ******************************************************************** function: stdio-based convenience library for opening/seeking/decoding - last mod: $Id: vorbisfile.c 17012 2010-03-24 07:37:36Z xiphmont $ + last mod: $Id: vorbisfile.c 17573 2010-10-27 14:53:59Z xiphmont $ ********************************************************************/ @@ -451,8 +451,9 @@ static ogg_int64_t _initial_pcmoffset(OggVorbis_File *vf, vorbis_info *vi){ } } - /* less than zero? This is a stream with samples trimmed off - the beginning, a normal occurrence; set the offset to zero */ + /* less than zero? Either a corrupt file or a stream with samples + trimmed off the beginning, a normal occurrence; in both cases set + the offset to zero */ if(accumulated<0)accumulated=0; return accumulated; @@ -513,7 +514,7 @@ static int _bisect_forward_serialno(OggVorbis_File *vf, vf->offsets[m+1]=end; vf->offsets[m]=begin; - vf->pcmlengths[m*2+1]=endgran; + vf->pcmlengths[m*2+1]=(endgran<0?0:endgran); }else{ @@ -533,8 +534,10 @@ static int _bisect_forward_serialno(OggVorbis_File *vf, bisect=(searched+endsearched)/2; } - ret=_seek_helper(vf,bisect); - if(ret)return(ret); + if(bisect != vf->offset){ + ret=_seek_helper(vf,bisect); + if(ret)return(ret); + } last=_get_next_page(vf,&og,-1); if(last==OV_EREAD)return(OV_EREAD); @@ -542,7 +545,7 @@ static int _bisect_forward_serialno(OggVorbis_File *vf, endsearched=bisect; if(last>=0)next=last; }else{ - searched=last+og.header_len+og.body_len; + searched=vf->offset; } } @@ -588,7 +591,7 @@ static int _bisect_forward_serialno(OggVorbis_File *vf, vf->pcmlengths[m*2+1]=searchgran; vf->pcmlengths[m*2+2]=pcmoffset; vf->pcmlengths[m*2+3]-=pcmoffset; - + if(vf->pcmlengths[m*2+3]<0)vf->pcmlengths[m*2+3]=0; } return(0); } @@ -647,6 +650,7 @@ static int _open_seekable2(OggVorbis_File *vf){ vf->dataoffsets[0]=dataoffset; vf->pcmlengths[0]=pcmoffset; vf->pcmlengths[1]-=pcmoffset; + if(vf->pcmlengths[1]<0)vf->pcmlengths[1]=0; return(ov_raw_seek(vf,dataoffset)); } @@ -687,6 +691,8 @@ static int _fetch_and_process_packet(OggVorbis_File *vf, /* process a packet if we can. */ if(vf->ready_state==INITSET){ + int hs=vorbis_synthesis_halfrate_p(vf->vi); + while(1) { ogg_packet op; ogg_packet *op_ptr=(op_in?op_in:&op); @@ -714,7 +720,7 @@ static int _fetch_and_process_packet(OggVorbis_File *vf, if(oldsamples)return(OV_EFAULT); vorbis_synthesis_blockin(&vf->vd,&vf->vb); - vf->samptrack+=vorbis_synthesis_pcmout(&vf->vd,NULL)-oldsamples; + vf->samptrack+=(vorbis_synthesis_pcmout(&vf->vd,NULL)<bittrack+=op_ptr->bytes*8; } @@ -743,7 +749,7 @@ static int _fetch_and_process_packet(OggVorbis_File *vf, here unless the stream is very broken */ - samples=vorbis_synthesis_pcmout(&vf->vd,NULL); + samples=(vorbis_synthesis_pcmout(&vf->vd,NULL)<serialnos=_ogg_calloc(serialno_list_size+2,sizeof(*vf->serialnos)); - vf->serialnos[0]=vf->current_serialno; + vf->serialnos[0]=vf->current_serialno=vf->os.serialno; vf->serialnos[1]=serialno_list_size; memcpy(vf->serialnos+2,serialno_list,serialno_list_size*sizeof(*vf->serialnos)); @@ -921,7 +927,6 @@ static int _ov_open1(void *f,OggVorbis_File *vf,char *initial, vf->dataoffsets=_ogg_calloc(1,sizeof(*vf->dataoffsets)); vf->offsets[0]=0; vf->dataoffsets[0]=vf->offset; - vf->current_serialno=vf->os.serialno; vf->ready_state=PARTOPEN; } @@ -985,14 +990,14 @@ int ov_clear(OggVorbis_File *vf){ 0) OK */ -int ov_open_callbacks(void *f,OggVorbis_File *vf,char *initial,long ibytes, - ov_callbacks callbacks){ +int ov_open_callbacks(void *f,OggVorbis_File *vf, + const char *initial,long ibytes,ov_callbacks callbacks){ int ret=_ov_open1(f,vf,initial,ibytes,callbacks); if(ret)return ret; return _ov_open2(vf); } -int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes){ +int ov_open(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes){ ov_callbacks callbacks = { (size_t (*)(void *, size_t, size_t, void *)) fread, (int (*)(void *, ogg_int64_t, int)) _fseek64_wrap, @@ -1003,7 +1008,7 @@ int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes){ return ov_open_callbacks((void *)f, vf, initial, ibytes, callbacks); } -int ov_fopen(char *path,OggVorbis_File *vf){ +int ov_fopen(const char *path,OggVorbis_File *vf){ int ret; FILE *f = fopen(path,"rb"); if(!f) return -1; @@ -1020,17 +1025,22 @@ int ov_fopen(char *path,OggVorbis_File *vf){ int ov_halfrate(OggVorbis_File *vf,int flag){ int i; if(vf->vi==NULL)return OV_EINVAL; - if(!vf->seekable)return OV_EINVAL; - if(vf->ready_state>=STREAMSET) - _decode_clear(vf); /* clear out stream state; later on libvorbis - will be able to swap this on the fly, but - for now dumping the decode machine is needed - to reinit the MDCT lookups. 1.1 libvorbis - is planned to be able to switch on the fly */ + if(vf->ready_state>STREAMSET){ + /* clear out stream state; dumping the decode machine is needed to + reinit the MDCT lookups. */ + vorbis_dsp_clear(&vf->vd); + vorbis_block_clear(&vf->vb); + vf->ready_state=STREAMSET; + if(vf->pcm_offset>=0){ + ogg_int64_t pos=vf->pcm_offset; + vf->pcm_offset=-1; /* make sure the pos is dumped if unseekable */ + ov_pcm_seek(vf,pos); + } + } for(i=0;ilinks;i++){ if(vorbis_synthesis_halfrate(vf->vi+i,flag)){ - ov_halfrate(vf,0); + if(flag) ov_halfrate(vf,0); return OV_EINVAL; } } @@ -1047,13 +1057,13 @@ int ov_halfrate_p(OggVorbis_File *vf){ seekability). Use ov_test_open to finish opening the file, else ov_clear to close/free it. Same return codes as open. */ -int ov_test_callbacks(void *f,OggVorbis_File *vf,char *initial,long ibytes, - ov_callbacks callbacks) +int ov_test_callbacks(void *f,OggVorbis_File *vf, + const char *initial,long ibytes,ov_callbacks callbacks) { return _ov_open1(f,vf,initial,ibytes,callbacks); } -int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes){ +int ov_test(FILE *f,OggVorbis_File *vf,const char *initial,long ibytes){ ov_callbacks callbacks = { (size_t (*)(void *, size_t, size_t, void *)) fread, (int (*)(void *, ogg_int64_t, int)) _fseek64_wrap, @@ -1226,6 +1236,12 @@ int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos){ if(pos<0 || pos>vf->end)return(OV_EINVAL); + /* is the seek position outside our current link [if any]? */ + if(vf->ready_state>=STREAMSET){ + if(posoffsets[vf->current_link] || pos>=vf->offsets[vf->current_link+1]) + _decode_clear(vf); /* clear out stream state */ + } + /* don't yet clear out decoding machine (if it's initialized), in the case we're in the same link. Restart the decode lapping, and let _fetch_and_process_packet deal with a potential bitstream @@ -1285,7 +1301,7 @@ int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos){ /* We can't get a guaranteed correct pcm position out of the last page in a stream because it might have a 'short' granpos, which can only be detected in the presence of a - preceeding page. However, if the last page is also the first + preceding page. However, if the last page is also the first page, the granpos rules of a first page take precedence. Not only that, but for first==last, the EOS page must be treated as if its a normal first page for the stream to open/play. */ @@ -1382,7 +1398,7 @@ int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos){ /* Page granularity seek (faster than sample granularity because we don't do the last bit of decode to find a specific sample). - Seek to the last [granule marked] page preceeding the specified pos + Seek to the last [granule marked] page preceding the specified pos location, such that decoding past the returned point will quickly arrive at the requested position. */ int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){ @@ -1402,7 +1418,7 @@ int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){ } /* search within the logical bitstream for the page with the highest - pcm_pos preceeding (or equal to) pos. There is a danger here; + pcm_pos preceding (or equal to) pos. There is a danger here; missing pages or incorrect frame number information in the bitstream could make our task impossible. Account for that (it would be an error condition) */ @@ -1427,12 +1443,14 @@ int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){ bisect=begin + (ogg_int64_t)((double)(target-begintime)*(end-begin)/(endtime-begintime)) - CHUNKSIZE; - if(bisect<=begin) - bisect=begin+1; + if(bisectoffset){ + result=_seek_helper(vf,bisect); + if(result) goto seek_error; + } while(beginoffset); @@ -1485,7 +1503,7 @@ int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){ } /* found our page. seek to it, update pcm offset. Easier case than - raw_seek, don't keep packets preceeding granulepos. */ + raw_seek, don't keep packets preceding granulepos. */ { ogg_page og; ogg_packet op; @@ -1517,7 +1535,7 @@ int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){ result=ogg_stream_packetpeek(&vf->os,&op); if(result==0){ /* !!! the packet finishing this page originated on a - preceeding page. Keep fetching previous pages until we + preceding page. Keep fetching previous pages until we get one with a granulepos or without the 'continued' flag set. Then just use raw_seek for simplicity. */ @@ -1647,17 +1665,22 @@ int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos){ vf->samptrack=0.f; /* discard samples until we reach the desired position. Crossing a logical bitstream boundary with abandon is OK. */ - while(vf->pcm_offsetpcm_offset; - long samples=vorbis_synthesis_pcmout(&vf->vd,NULL); + { + /* note that halfrate could be set differently in each link, but + vorbisfile encoforces all links are set or unset */ + int hs=vorbis_synthesis_halfrate_p(vf->vi); + while(vf->pcm_offset<((pos>>hs)<pcm_offset)>>hs; + long samples=vorbis_synthesis_pcmout(&vf->vd,NULL); - if(samples>target)samples=target; - vorbis_synthesis_read(&vf->vd,samples); - vf->pcm_offset+=samples; + if(samples>target)samples=target; + vorbis_synthesis_read(&vf->vd,samples); + vf->pcm_offset+=samples<pcm_offset=ov_pcm_total(vf,-1); /* eof */ + if(samplespcm_offset=ov_pcm_total(vf,-1); /* eof */ + } } return 0; } @@ -1848,6 +1871,7 @@ long ov_read_filter(OggVorbis_File *vf,char *buffer,int length, void (*filter)(float **pcm,long channels,long samples,void *filter_param),void *filter_param){ int i,j; int host_endian = host_is_big_endian(); + int hs; float **pcm; long samples; @@ -1971,7 +1995,8 @@ long ov_read_filter(OggVorbis_File *vf,char *buffer,int length, } vorbis_synthesis_read(&vf->vd,samples); - vf->pcm_offset+=samples; + hs=vorbis_synthesis_halfrate_p(vf->vi); + vf->pcm_offset+=(samples<current_link; return(samples*bytespersample); }else{ @@ -2008,10 +2033,11 @@ long ov_read_float(OggVorbis_File *vf,float ***pcm_channels,int length, float **pcm; long samples=vorbis_synthesis_pcmout(&vf->vd,&pcm); if(samples){ + int hs=vorbis_synthesis_halfrate_p(vf->vi); if(pcm_channels)*pcm_channels=pcm; if(samples>length)samples=length; vorbis_synthesis_read(&vf->vd,samples); - vf->pcm_offset+=samples; + vf->pcm_offset+=samples<current_link; return samples; diff --git a/ExternalLibs/libvorbis-1.3.1/lib/window.c b/ExternalLibs/libvorbis-1.3.2/lib/window.c similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/window.c rename to ExternalLibs/libvorbis-1.3.2/lib/window.c diff --git a/ExternalLibs/libvorbis-1.3.1/lib/window.h b/ExternalLibs/libvorbis-1.3.2/lib/window.h similarity index 100% rename from ExternalLibs/libvorbis-1.3.1/lib/window.h rename to ExternalLibs/libvorbis-1.3.2/lib/window.h