mirror of
https://github.com/zeldaret/oot.git
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Delete unused yaz0tool (#1959)
This commit is contained in:
cadmic
GitHub
parent
44ca32168a
commit
7332e8ee76
4 changed files with 1 additions and 451 deletions
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@ -1,5 +1,5 @@
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CFLAGS := -Wall -Wextra -pedantic -std=c99 -g -O2
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PROGRAMS := elf2rom makeromfs mkdmadata mkldscript reloc_prereq vtxdis yaz0
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PROGRAMS := elf2rom makeromfs mkdmadata mkldscript reloc_prereq vtxdis
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ifeq ($(shell command -v clang >/dev/null 2>&1; echo $$?),0)
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CC := clang
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@ -36,7 +36,6 @@ mkdmadata_SOURCES := mkdmadata.c spec.c util.c
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mkldscript_SOURCES := mkldscript.c spec.c util.c
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reloc_prereq_SOURCES := reloc_prereq.c spec.c util.c
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vtxdis_SOURCES := vtxdis.c
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yaz0_SOURCES := yaz0tool.c yaz0.c util.c
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define COMPILE =
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238
tools/yaz0.c
238
tools/yaz0.c
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@ -1,238 +0,0 @@
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#include <assert.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "yaz0.h"
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// decoder implementation by thakis of http://www.amnoid.de
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// src points to the yaz0 source data (to the "real" source data, not at the header!)
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// dst points to a buffer uncompressedSize bytes large (you get uncompressedSize from
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// the second 4 bytes in the Yaz0 header).
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void yaz0_decode(uint8_t* src, uint8_t* dst, int uncompressedSize)
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{
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int srcPlace = 0, dstPlace = 0; // current read/write positions
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unsigned int validBitCount = 0; // number of valid bits left in "code" byte
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uint8_t currCodeByte;
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while (dstPlace < uncompressedSize)
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{
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// read new "code" byte if the current one is used up
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if (validBitCount == 0)
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{
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currCodeByte = src[srcPlace];
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++srcPlace;
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validBitCount = 8;
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}
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if ((currCodeByte & 0x80) != 0)
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{
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// straight copy
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dst[dstPlace] = src[srcPlace];
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dstPlace++;
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srcPlace++;
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}
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else
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{
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// RLE part
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uint8_t byte1 = src[srcPlace];
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uint8_t byte2 = src[srcPlace + 1];
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srcPlace += 2;
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unsigned int dist = ((byte1 & 0xF) << 8) | byte2;
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unsigned int copySource = dstPlace - (dist + 1);
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unsigned int numBytes = byte1 >> 4;
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if (numBytes == 0)
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{
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numBytes = src[srcPlace] + 0x12;
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srcPlace++;
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}
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else
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{
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numBytes += 2;
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}
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// copy run
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for (unsigned int i = 0; i < numBytes; ++i)
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{
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dst[dstPlace] = dst[copySource];
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copySource++;
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dstPlace++;
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}
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}
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// use next bit from "code" byte
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currCodeByte <<= 1;
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validBitCount -= 1;
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}
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}
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// encoder implementation by shevious, with bug fixes by notwa
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typedef uint32_t uint32_t;
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typedef uint8_t uint8_t;
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#define MAX_RUNLEN (0xFF + 0x12)
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// simple and straight encoding scheme for Yaz0
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static uint32_t simpleEnc(uint8_t *src, int size, int pos, uint32_t *pMatchPos)
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{
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int numBytes = 1;
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int matchPos = 0;
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int startPos = pos - 0x1000;
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int end = size - pos;
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if (startPos < 0)
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startPos = 0;
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// maximum runlength for 3 byte encoding
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if (end > MAX_RUNLEN)
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end = MAX_RUNLEN;
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for (int i = startPos; i < pos; i++)
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{
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int j;
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for (j = 0; j < end; j++)
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{
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if (src[i + j] != src[j + pos])
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break;
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}
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if (j > numBytes)
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{
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numBytes = j;
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matchPos = i;
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}
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}
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*pMatchPos = matchPos;
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if (numBytes == 2)
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numBytes = 1;
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return numBytes;
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}
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// a lookahead encoding scheme for ngc Yaz0
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static uint32_t nintendoEnc(uint8_t *src, int size, int pos, uint32_t *pMatchPos)
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{
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uint32_t numBytes = 1;
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static uint32_t numBytes1;
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static uint32_t matchPos;
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static int prevFlag = 0;
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// if prevFlag is set, it means that the previous position
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// was determined by look-ahead try.
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// so just use it. this is not the best optimization,
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// but nintendo's choice for speed.
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if (prevFlag == 1)
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{
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*pMatchPos = matchPos;
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prevFlag = 0;
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return numBytes1;
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}
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prevFlag = 0;
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numBytes = simpleEnc(src, size, pos, &matchPos);
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*pMatchPos = matchPos;
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// if this position is RLE encoded, then compare to copying 1 byte and next position(pos+1) encoding
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if (numBytes >= 3)
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{
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numBytes1 = simpleEnc(src, size, pos + 1, &matchPos);
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// if the next position encoding is +2 longer than current position, choose it.
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// this does not guarantee the best optimization, but fairly good optimization with speed.
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if (numBytes1 >= numBytes + 2)
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{
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numBytes = 1;
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prevFlag = 1;
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}
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}
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return numBytes;
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}
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int yaz0_encode(uint8_t *src, uint8_t *dst, int srcSize)
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{
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int srcPos = 0;
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int dstPos = 0;
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int bufPos = 0;
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uint8_t buf[24]; // 8 codes * 3 bytes maximum
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uint32_t validBitCount = 0; // number of valid bits left in "code" byte
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uint8_t currCodeByte = 0; // a bitfield, set bits meaning copy, unset meaning RLE
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while (srcPos < srcSize)
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{
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uint32_t numBytes;
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uint32_t matchPos;
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numBytes = nintendoEnc(src, srcSize, srcPos, &matchPos);
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if (numBytes < 3)
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{
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// straight copy
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buf[bufPos] = src[srcPos];
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bufPos++;
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srcPos++;
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//set flag for straight copy
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currCodeByte |= (0x80 >> validBitCount);
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}
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else
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{
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//RLE part
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uint32_t dist = srcPos - matchPos - 1;
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uint8_t byte1, byte2, byte3;
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if (numBytes >= 0x12) // 3 byte encoding
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{
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byte1 = 0 | (dist >> 8);
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byte2 = dist & 0xFF;
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buf[bufPos++] = byte1;
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buf[bufPos++] = byte2;
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// maximum runlength for 3 byte encoding
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if (numBytes > MAX_RUNLEN)
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numBytes = MAX_RUNLEN;
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byte3 = numBytes - 0x12;
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buf[bufPos++] = byte3;
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}
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else // 2 byte encoding
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{
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byte1 = ((numBytes - 2) << 4) | (dist >> 8);
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byte2 = dist & 0xFF;
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buf[bufPos++] = byte1;
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buf[bufPos++] = byte2;
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}
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srcPos += numBytes;
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}
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validBitCount++;
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// write eight codes
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if (validBitCount == 8)
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{
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dst[dstPos++] = currCodeByte;
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for (int j = 0; j < bufPos; j++)
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dst[dstPos++] = buf[j];
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currCodeByte = 0;
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validBitCount = 0;
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bufPos = 0;
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}
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}
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if (validBitCount > 0)
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{
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dst[dstPos++] = currCodeByte;
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for (int j = 0; j < bufPos; j++)
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dst[dstPos++] = buf[j];
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currCodeByte = 0;
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validBitCount = 0;
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bufPos = 0;
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}
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return dstPos;
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}
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10
tools/yaz0.h
10
tools/yaz0.h
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@ -1,10 +0,0 @@
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#ifndef _YAZ0_H_
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#define _YAZ0_H_
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int yaz0_encode2(uint8_t *src, uint8_t *dest, int uncompressedSize);
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void yaz0_decode(uint8_t* src, uint8_t* dst, int uncompressedSize);
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int yaz0_encode(uint8_t *src, uint8_t *dest, int srcSize);
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#endif // _YAZ0_H_
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201
tools/yaz0tool.c
201
tools/yaz0tool.c
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@ -1,201 +0,0 @@
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#ifdef __linux__
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#define _POSIX_C_SOURCE 199309L
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#endif
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "yaz0.h"
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#include "util.h"
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// TODO: Windows support
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static unsigned long int get_time_milliseconds(void)
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{
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#ifdef __linux__
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struct timespec tspec;
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clock_gettime(CLOCK_MONOTONIC, &tspec);
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return (tspec.tv_sec * 1000) + tspec.tv_nsec / 1000000;
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#else
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// dummy
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return 0;
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#endif
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}
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static void print_report(unsigned long int time, size_t compSize, size_t uncompSize)
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{
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unsigned int minutes = time / (1000 * 60);
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float seconds = (float)(time % (1000 * 60)) / 1000;
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printf("compression ratio: %.2fKiB / %.2fKiB (%.2f%%)\n"
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"time: %um %.3fs\n",
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(float)compSize / 1024, (float)uncompSize / 1024,
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(float)compSize * 100 / (float)uncompSize,
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minutes, seconds);
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}
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static void compress_file(const char *inputFileName, const char *outputFileName, bool verbose)
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{
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size_t uncompSize;
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uint8_t *input = util_read_whole_file(inputFileName, &uncompSize);
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uint8_t *output = malloc(uncompSize * 2); // TODO: figure out how much space we need
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unsigned long int time;
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if (verbose)
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{
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printf("decompressing %s\n", inputFileName);
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time = get_time_milliseconds();
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}
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// compress data
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size_t compSize = yaz0_encode(input, output, uncompSize);
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if (verbose)
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time = get_time_milliseconds() - time;
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// make Yaz0 header
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uint8_t header[16] = {0};
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header[0] = 'Y';
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header[1] = 'a';
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header[2] = 'z';
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header[3] = '0';
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util_write_uint32_be(header + 4, uncompSize);
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// write output file
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FILE *outFile = fopen(outputFileName, "wb");
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if (outFile == NULL)
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util_fatal_error("failed to open file '%s' for writing", outputFileName);
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fwrite(header, sizeof(header), 1, outFile);
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fwrite(output, compSize, 1, outFile);
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fclose(outFile);
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free(input);
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free(output);
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if (verbose)
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print_report(time, compSize, uncompSize);
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}
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static void decompress_file(const char *inputFileName, const char *outputFileName, bool verbose)
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{
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size_t compSize;
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uint8_t *input = util_read_whole_file(inputFileName, &compSize);
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size_t uncompSize;
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uint8_t *output;
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unsigned long int time = 0;
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// read header
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if (input[0] != 'Y' || input[1] != 'a' || input[2] != 'z' || input[3] != '0')
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util_fatal_error("file '%s' does not have a valid Yaz0 header", inputFileName);
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uncompSize = util_read_uint32_be(input + 4);
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// decompress data
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output = malloc(uncompSize);
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if (verbose)
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{
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printf("decompressing %s\n", inputFileName);
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time = get_time_milliseconds();
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}
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yaz0_decode(input + 16, output, uncompSize);
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if (verbose)
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time = get_time_milliseconds() - time;
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// write output file
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FILE *outFile = fopen(outputFileName, "wb");
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fwrite(output, uncompSize, 1, outFile);
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fclose(outFile);
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free(input);
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free(output);
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if (verbose)
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print_report(time, compSize, uncompSize);
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}
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static void usage(const char *execName)
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{
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printf("Yaz0 compressor/decompressor\n"
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"usage: %s [-d] [-h] [-v] INPUT_FILE OUTPUT_FILE\n"
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"compresses INPUT_FILE using Yaz0 encoding and writes output to OUTPUT_FILE\n"
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"Available options:\n"
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"-d: decompresses INPUT_FILE, a Yaz0 compressed file, and writes decompressed\n"
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" output to OUTPUT_FILE\n"
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"-v: prints verbose output (compression ratio and time)\n"
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"-h: shows this help message\n",
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execName);
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}
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int main(int argc, char **argv)
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{
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int i;
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const char *inputFileName = NULL;
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const char *outputFileName = NULL;
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bool decompress = false;
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bool verbose = false;
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// parse arguments
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for (i = 1; i < argc; i++)
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{
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char *arg = argv[i];
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if (arg[0] == '-')
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{
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if (strcmp(arg, "-d") == 0)
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decompress = true;
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else if (strcmp(arg, "-v") == 0)
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verbose = true;
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else if (strcmp(arg, "-h") == 0)
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{
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usage(argv[0]);
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return 0;
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}
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else
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{
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printf("unknown option %s\n", arg);
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usage(argv[0]);
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return 1;
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}
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}
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else
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{
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if (inputFileName == NULL)
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inputFileName = arg;
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else if (outputFileName == NULL)
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outputFileName = arg;
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else
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{
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puts("too many files specified");
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usage(argv[0]);
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return 1;
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}
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}
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}
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if (inputFileName == NULL)
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{
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puts("no input file specified");
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usage(argv[0]);
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return 1;
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}
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if (outputFileName == NULL)
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{
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puts("no output file specified");
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usage(argv[0]);
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return 1;
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}
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if (decompress)
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decompress_file(inputFileName, outputFileName, verbose);
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else
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compress_file(inputFileName, outputFileName, verbose);
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return 0;
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}
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