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Diffstat (limited to 'ffmpeg1/libavcodec/h264_sei.c')
-rw-r--r--ffmpeg1/libavcodec/h264_sei.c251
1 files changed, 0 insertions, 251 deletions
diff --git a/ffmpeg1/libavcodec/h264_sei.c b/ffmpeg1/libavcodec/h264_sei.c
deleted file mode 100644
index be6cb58..0000000
--- a/ffmpeg1/libavcodec/h264_sei.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * H.26L/H.264/AVC/JVT/14496-10/... sei decoding
- * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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
- */
-
-/**
- * @file
- * H.264 / AVC / MPEG4 part10 sei decoding.
- * @author Michael Niedermayer <michaelni@gmx.at>
- */
-
-#include "internal.h"
-#include "avcodec.h"
-#include "h264.h"
-#include "golomb.h"
-
-//#undef NDEBUG
-#include <assert.h>
-
-static const uint8_t sei_num_clock_ts_table[9]={
- 1, 1, 1, 2, 2, 3, 3, 2, 3
-};
-
-void ff_h264_reset_sei(H264Context *h) {
- h->sei_recovery_frame_cnt = -1;
- h->sei_dpb_output_delay = 0;
- h->sei_cpb_removal_delay = -1;
- h->sei_buffering_period_present = 0;
-}
-
-static int decode_picture_timing(H264Context *h){
- if(h->sps.nal_hrd_parameters_present_flag || h->sps.vcl_hrd_parameters_present_flag){
- h->sei_cpb_removal_delay = get_bits_long(&h->gb, h->sps.cpb_removal_delay_length);
- h->sei_dpb_output_delay = get_bits_long(&h->gb, h->sps.dpb_output_delay_length);
- }
- if(h->sps.pic_struct_present_flag){
- unsigned int i, num_clock_ts;
- h->sei_pic_struct = get_bits(&h->gb, 4);
- h->sei_ct_type = 0;
-
- if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
- return -1;
-
- num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct];
-
- for (i = 0 ; i < num_clock_ts ; i++){
- if(get_bits(&h->gb, 1)){ /* clock_timestamp_flag */
- unsigned int full_timestamp_flag;
- h->sei_ct_type |= 1<<get_bits(&h->gb, 2);
- skip_bits(&h->gb, 1); /* nuit_field_based_flag */
- skip_bits(&h->gb, 5); /* counting_type */
- full_timestamp_flag = get_bits(&h->gb, 1);
- skip_bits(&h->gb, 1); /* discontinuity_flag */
- skip_bits(&h->gb, 1); /* cnt_dropped_flag */
- skip_bits(&h->gb, 8); /* n_frames */
- if(full_timestamp_flag){
- skip_bits(&h->gb, 6); /* seconds_value 0..59 */
- skip_bits(&h->gb, 6); /* minutes_value 0..59 */
- skip_bits(&h->gb, 5); /* hours_value 0..23 */
- }else{
- if(get_bits(&h->gb, 1)){ /* seconds_flag */
- skip_bits(&h->gb, 6); /* seconds_value range 0..59 */
- if(get_bits(&h->gb, 1)){ /* minutes_flag */
- skip_bits(&h->gb, 6); /* minutes_value 0..59 */
- if(get_bits(&h->gb, 1)) /* hours_flag */
- skip_bits(&h->gb, 5); /* hours_value 0..23 */
- }
- }
- }
- if(h->sps.time_offset_length > 0)
- skip_bits(&h->gb, h->sps.time_offset_length); /* time_offset */
- }
- }
-
- if(h->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(h->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n", h->sei_ct_type, h->sei_pic_struct);
- }
- return 0;
-}
-
-static int decode_user_data_itu_t_t35(H264Context *h, int size) {
- uint32_t user_identifier;
- int dtg_active_format;
-
- if (size < 7)
- return -1;
- size -= 7;
-
- skip_bits(&h->gb, 8); // country_code
- skip_bits(&h->gb, 16); // provider_code
- user_identifier = get_bits_long(&h->gb, 32);
-
- switch (user_identifier) {
- case 0x44544731: // "DTG1" - AFD_data
- if (size < 1)
- return -1;
- skip_bits(&h->gb, 1);
- if (get_bits(&h->gb, 1)) {
- skip_bits(&h->gb, 6);
- if (size < 2)
- return -1;
- skip_bits(&h->gb, 4);
- dtg_active_format = get_bits(&h->gb, 4);
- h->avctx->dtg_active_format = dtg_active_format;
- } else {
- skip_bits(&h->gb, 6);
- }
- break;
- default:
- skip_bits(&h->gb, size * 8);
- break;
- }
-
- return 0;
-}
-
-static int decode_unregistered_user_data(H264Context *h, int size){
- uint8_t user_data[16+256];
- int e, build, i;
-
- if(size<16)
- return -1;
-
- for(i=0; i<sizeof(user_data)-1 && i<size; i++){
- user_data[i]= get_bits(&h->gb, 8);
- }
-
- user_data[i]= 0;
- e= sscanf(user_data+16, "x264 - core %d"/*%s - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html*/, &build);
- if(e==1 && build>0)
- h->x264_build= build;
- if(e==1 && build==1 && !strncmp(user_data+16, "x264 - core 0000", 16))
- h->x264_build = 67;
-
- if(h->avctx->debug & FF_DEBUG_BUGS)
- av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data+16);
-
- for(; i<size; i++)
- skip_bits(&h->gb, 8);
-
- return 0;
-}
-
-static int decode_recovery_point(H264Context *h){
- h->sei_recovery_frame_cnt = get_ue_golomb(&h->gb);
- skip_bits(&h->gb, 4); /* 1b exact_match_flag, 1b broken_link_flag, 2b changing_slice_group_idc */
-
- if(h->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(h->avctx, AV_LOG_DEBUG, "sei_recovery_frame_cnt: %d\n", h->sei_recovery_frame_cnt);
-
- return 0;
-}
-
-static int decode_buffering_period(H264Context *h){
- unsigned int sps_id;
- int sched_sel_idx;
- SPS *sps;
-
- sps_id = get_ue_golomb_31(&h->gb);
- if(sps_id > 31 || !h->sps_buffers[sps_id]) {
- av_log(h->avctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id);
- return -1;
- }
- sps = h->sps_buffers[sps_id];
-
- // NOTE: This is really so duplicated in the standard... See H.264, D.1.1
- if (sps->nal_hrd_parameters_present_flag) {
- for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
- h->initial_cpb_removal_delay[sched_sel_idx] = get_bits_long(&h->gb, sps->initial_cpb_removal_delay_length);
- skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
- }
- }
- if (sps->vcl_hrd_parameters_present_flag) {
- for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
- h->initial_cpb_removal_delay[sched_sel_idx] = get_bits_long(&h->gb, sps->initial_cpb_removal_delay_length);
- skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
- }
- }
-
- h->sei_buffering_period_present = 1;
- return 0;
-}
-
-int ff_h264_decode_sei(H264Context *h){
- while (get_bits_left(&h->gb) > 16) {
- int size, type;
-
- type=0;
- do{
- if (get_bits_left(&h->gb) < 8)
- return -1;
- type+= show_bits(&h->gb, 8);
- }while(get_bits(&h->gb, 8) == 255);
-
- size=0;
- do{
- if (get_bits_left(&h->gb) < 8)
- return -1;
- size+= show_bits(&h->gb, 8);
- }while(get_bits(&h->gb, 8) == 255);
-
- if(h->avctx->debug&FF_DEBUG_STARTCODE)
- av_log(h->avctx, AV_LOG_DEBUG, "SEI %d len:%d\n", type, size);
-
- switch(type){
- case SEI_TYPE_PIC_TIMING: // Picture timing SEI
- if(decode_picture_timing(h) < 0)
- return -1;
- break;
- case SEI_TYPE_USER_DATA_ITU_T_T35:
- if(decode_user_data_itu_t_t35(h, size) < 0)
- return -1;
- break;
- case SEI_TYPE_USER_DATA_UNREGISTERED:
- if(decode_unregistered_user_data(h, size) < 0)
- return -1;
- break;
- case SEI_TYPE_RECOVERY_POINT:
- if(decode_recovery_point(h) < 0)
- return -1;
- break;
- case SEI_BUFFERING_PERIOD:
- if(decode_buffering_period(h) < 0)
- return -1;
- break;
- default:
- skip_bits(&h->gb, 8*size);
- }
-
- //FIXME check bits here
- align_get_bits(&h->gb);
- }
-
- return 0;
-}
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