libbpg-0.9.3
This commit is contained in:
commit
b21307932d
266 changed files with 108670 additions and 0 deletions
211
libavcodec/hevc_sei.c
Normal file
211
libavcodec/hevc_sei.c
Normal file
|
|
@ -0,0 +1,211 @@
|
|||
/*
|
||||
* HEVC Supplementary Enhancement Information messages
|
||||
*
|
||||
* Copyright (C) 2012 - 2013 Guillaume Martres
|
||||
* Copyright (C) 2012 - 2013 Gildas Cocherel
|
||||
* Copyright (C) 2013 Vittorio Giovara
|
||||
*
|
||||
* This file is part of FFmpeg.
|
||||
*
|
||||
* FFmpeg is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* FFmpeg 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with FFmpeg; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include "golomb.h"
|
||||
#include "hevc.h"
|
||||
|
||||
static void decode_nal_sei_decoded_picture_hash(HEVCContext *s)
|
||||
{
|
||||
int cIdx, i;
|
||||
uint8_t hash_type;
|
||||
//uint16_t picture_crc;
|
||||
//uint32_t picture_checksum;
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
hash_type = get_bits(gb, 8);
|
||||
|
||||
for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
|
||||
if (hash_type == 0) {
|
||||
s->is_md5 = 1;
|
||||
for (i = 0; i < 16; i++)
|
||||
s->md5[cIdx][i] = get_bits(gb, 8);
|
||||
} else if (hash_type == 1) {
|
||||
// picture_crc = get_bits(gb, 16);
|
||||
skip_bits(gb, 16);
|
||||
} else if (hash_type == 2) {
|
||||
// picture_checksum = get_bits_long(gb, 32);
|
||||
skip_bits(gb, 32);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef USE_FULL
|
||||
static void decode_nal_sei_frame_packing_arrangement(HEVCContext *s)
|
||||
{
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
|
||||
get_ue_golomb(gb); // frame_packing_arrangement_id
|
||||
s->sei_frame_packing_present = !get_bits1(gb);
|
||||
|
||||
if (s->sei_frame_packing_present) {
|
||||
s->frame_packing_arrangement_type = get_bits(gb, 7);
|
||||
s->quincunx_subsampling = get_bits1(gb);
|
||||
s->content_interpretation_type = get_bits(gb, 6);
|
||||
|
||||
// the following skips spatial_flipping_flag frame0_flipped_flag
|
||||
// field_views_flag current_frame_is_frame0_flag
|
||||
// frame0_self_contained_flag frame1_self_contained_flag
|
||||
skip_bits(gb, 6);
|
||||
|
||||
if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
|
||||
skip_bits(gb, 16); // frame[01]_grid_position_[xy]
|
||||
skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
|
||||
skip_bits1(gb); // frame_packing_arrangement_persistance_flag
|
||||
}
|
||||
skip_bits1(gb); // upsampled_aspect_ratio_flag
|
||||
}
|
||||
|
||||
static void decode_nal_sei_display_orientation(HEVCContext *s)
|
||||
{
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
|
||||
s->sei_display_orientation_present = !get_bits1(gb);
|
||||
|
||||
if (s->sei_display_orientation_present) {
|
||||
s->sei_hflip = get_bits1(gb); // hor_flip
|
||||
s->sei_vflip = get_bits1(gb); // ver_flip
|
||||
|
||||
s->sei_anticlockwise_rotation = get_bits(gb, 16);
|
||||
skip_bits1(gb); // display_orientation_persistence_flag
|
||||
}
|
||||
}
|
||||
|
||||
static int decode_pic_timing(HEVCContext *s)
|
||||
{
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
HEVCSPS *sps;
|
||||
|
||||
if (!s->sps_list[s->active_seq_parameter_set_id])
|
||||
return(AVERROR(ENOMEM));
|
||||
sps = (HEVCSPS*)s->sps_list[s->active_seq_parameter_set_id]->data;
|
||||
|
||||
if (sps->vui.frame_field_info_present_flag) {
|
||||
int pic_struct = get_bits(gb, 4);
|
||||
s->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
|
||||
if (pic_struct == 2) {
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "BOTTOM Field\n");
|
||||
s->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
|
||||
} else if (pic_struct == 1) {
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "TOP Field\n");
|
||||
s->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
|
||||
}
|
||||
get_bits(gb, 2); // source_scan_type
|
||||
get_bits(gb, 1); // duplicate_flag
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int active_parameter_sets(HEVCContext *s)
|
||||
{
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
int num_sps_ids_minus1;
|
||||
int i;
|
||||
unsigned active_seq_parameter_set_id;
|
||||
|
||||
get_bits(gb, 4); // active_video_parameter_set_id
|
||||
get_bits(gb, 1); // self_contained_cvs_flag
|
||||
get_bits(gb, 1); // num_sps_ids_minus1
|
||||
num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
|
||||
|
||||
active_seq_parameter_set_id = get_ue_golomb_long(gb);
|
||||
if (active_seq_parameter_set_id >= MAX_SPS_COUNT) {
|
||||
av_log(s->avctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
s->active_seq_parameter_set_id = active_seq_parameter_set_id;
|
||||
|
||||
for (i = 1; i <= num_sps_ids_minus1; i++)
|
||||
get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int decode_nal_sei_message(HEVCContext *s)
|
||||
{
|
||||
GetBitContext *gb = &s->HEVClc->gb;
|
||||
|
||||
int payload_type = 0;
|
||||
int payload_size = 0;
|
||||
int byte = 0xFF;
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "Decoding SEI\n");
|
||||
|
||||
while (byte == 0xFF) {
|
||||
byte = get_bits(gb, 8);
|
||||
payload_type += byte;
|
||||
}
|
||||
byte = 0xFF;
|
||||
while (byte == 0xFF) {
|
||||
byte = get_bits(gb, 8);
|
||||
payload_size += byte;
|
||||
}
|
||||
if (s->nal_unit_type == NAL_SEI_PREFIX) {
|
||||
if (payload_type == 256 /*&& s->decode_checksum_sei*/) {
|
||||
decode_nal_sei_decoded_picture_hash(s);
|
||||
} else
|
||||
#ifdef USE_FULL
|
||||
if (payload_type == 45) {
|
||||
decode_nal_sei_frame_packing_arrangement(s);
|
||||
} else if (payload_type == 47) {
|
||||
decode_nal_sei_display_orientation(s);
|
||||
} else if (payload_type == 1){
|
||||
int ret = decode_pic_timing(s);
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
|
||||
skip_bits(gb, 8 * payload_size);
|
||||
return ret;
|
||||
} else if (payload_type == 129){
|
||||
active_parameter_sets(s);
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", payload_type);
|
||||
skip_bits(gb, 8*payload_size);
|
||||
}
|
||||
} else { /* nal_unit_type == NAL_SEI_SUFFIX */
|
||||
if (payload_type == 132 /* && s->decode_checksum_sei */)
|
||||
decode_nal_sei_decoded_picture_hash(s);
|
||||
else {
|
||||
av_log(s->avctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", payload_type);
|
||||
skip_bits(gb, 8 * payload_size);
|
||||
}
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int more_rbsp_data(GetBitContext *gb)
|
||||
{
|
||||
return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
|
||||
}
|
||||
|
||||
int ff_hevc_decode_nal_sei(HEVCContext *s)
|
||||
{
|
||||
int ret;
|
||||
|
||||
do {
|
||||
ret = decode_nal_sei_message(s);
|
||||
if (ret < 0)
|
||||
return(AVERROR(ENOMEM));
|
||||
} while (more_rbsp_data(&s->HEVClc->gb));
|
||||
return 1;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue