2 * MPEG2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 //#define USE_SYNCPOINT_SEARCH
26 #include "libavutil/crc.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavcodec/bytestream.h"
34 /* 1.0 second at 24Mbit/s */
35 #define MAX_SCAN_PACKETS 32000
37 /* maximum size in which we look for synchronisation if
38 synchronisation is lost */
39 #define MAX_RESYNC_SIZE 65536
41 #define MAX_PES_PAYLOAD 200*1024
43 typedef struct PESContext PESContext;
45 static PESContext* add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type);
47 enum MpegTSFilterType {
52 typedef struct MpegTSFilter MpegTSFilter;
54 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
56 typedef struct MpegTSPESFilter {
61 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
63 typedef void SetServiceCallback(void *opaque, int ret);
65 typedef struct MpegTSSectionFilter {
69 unsigned int check_crc:1;
70 unsigned int end_of_section_reached:1;
71 SectionCallback *section_cb;
73 } MpegTSSectionFilter;
77 int last_cc; /* last cc code (-1 if first packet) */
78 enum MpegTSFilterType type;
80 MpegTSPESFilter pes_filter;
81 MpegTSSectionFilter section_filter;
85 #define MAX_PIDS_PER_PROGRAM 64
87 unsigned int id; //program id/service id
89 unsigned int pids[MAX_PIDS_PER_PROGRAM];
92 struct MpegTSContext {
94 AVFormatContext *stream;
95 /** raw packet size, including FEC if present */
100 /** if true, all pids are analyzed to find streams */
103 /** compute exact PCR for each transport stream packet */
104 int mpeg2ts_compute_pcr;
106 int64_t cur_pcr; /**< used to estimate the exact PCR */
107 int pcr_incr; /**< used to estimate the exact PCR */
109 /* data needed to handle file based ts */
110 /** stop parsing loop */
112 /** packet containing Audio/Video data */
114 /** to detect seek */
117 /******************************************/
118 /* private mpegts data */
120 /** structure to keep track of Program->pids mapping */
125 /** filters for various streams specified by PMT + for the PAT and PMT */
126 MpegTSFilter *pids[NB_PID_MAX];
129 /* TS stream handling */
134 MPEGTS_PESHEADER_FILL,
139 /* enough for PES header + length */
140 #define PES_START_SIZE 6
141 #define PES_HEADER_SIZE 9
142 #define MAX_PES_HEADER_SIZE (9 + 255)
146 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
149 AVFormatContext *stream;
151 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
152 enum MpegTSState state;
153 /* used to get the format */
157 int extended_stream_id;
159 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
160 uint8_t header[MAX_PES_HEADER_SIZE];
164 extern AVInputFormat mpegts_demuxer;
166 static void clear_program(MpegTSContext *ts, unsigned int programid)
170 for(i=0; i<ts->nb_prg; i++)
171 if(ts->prg[i].id == programid)
172 ts->prg[i].nb_pids = 0;
175 static void clear_programs(MpegTSContext *ts)
181 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
184 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
188 p = &ts->prg[ts->nb_prg];
194 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
197 struct Program *p = NULL;
198 for(i=0; i<ts->nb_prg; i++) {
199 if(ts->prg[i].id == programid) {
207 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
209 p->pids[p->nb_pids++] = pid;
213 * \brief discard_pid() decides if the pid is to be discarded according
214 * to caller's programs selection
215 * \param ts : - TS context
217 * \return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
220 static int discard_pid(MpegTSContext *ts, unsigned int pid)
223 int used = 0, discarded = 0;
225 for(i=0; i<ts->nb_prg; i++) {
227 for(j=0; j<p->nb_pids; j++) {
228 if(p->pids[j] != pid)
230 //is program with id p->id set to be discarded?
231 for(k=0; k<ts->stream->nb_programs; k++) {
232 if(ts->stream->programs[k]->id == p->id) {
233 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
242 return !used && discarded;
246 * Assembles PES packets out of TS packets, and then calls the "section_cb"
247 * function when they are complete.
249 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
250 const uint8_t *buf, int buf_size, int is_start)
252 MpegTSSectionFilter *tss = &tss1->u.section_filter;
256 memcpy(tss->section_buf, buf, buf_size);
257 tss->section_index = buf_size;
258 tss->section_h_size = -1;
259 tss->end_of_section_reached = 0;
261 if (tss->end_of_section_reached)
263 len = 4096 - tss->section_index;
266 memcpy(tss->section_buf + tss->section_index, buf, len);
267 tss->section_index += len;
270 /* compute section length if possible */
271 if (tss->section_h_size == -1 && tss->section_index >= 3) {
272 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
275 tss->section_h_size = len;
278 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
279 tss->end_of_section_reached = 1;
280 if (!tss->check_crc ||
281 av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
282 tss->section_buf, tss->section_h_size) == 0)
283 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
287 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
288 SectionCallback *section_cb, void *opaque,
292 MpegTSFilter *filter;
293 MpegTSSectionFilter *sec;
295 dprintf(ts->stream, "Filter: pid=0x%x\n", pid);
297 if (pid >= NB_PID_MAX || ts->pids[pid])
299 filter = av_mallocz(sizeof(MpegTSFilter));
302 ts->pids[pid] = filter;
303 filter->type = MPEGTS_SECTION;
305 filter->last_cc = -1;
306 sec = &filter->u.section_filter;
307 sec->section_cb = section_cb;
308 sec->opaque = opaque;
309 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
310 sec->check_crc = check_crc;
311 if (!sec->section_buf) {
318 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
322 MpegTSFilter *filter;
323 MpegTSPESFilter *pes;
325 if (pid >= NB_PID_MAX || ts->pids[pid])
327 filter = av_mallocz(sizeof(MpegTSFilter));
330 ts->pids[pid] = filter;
331 filter->type = MPEGTS_PES;
333 filter->last_cc = -1;
334 pes = &filter->u.pes_filter;
335 pes->pes_cb = pes_cb;
336 pes->opaque = opaque;
340 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
345 if (filter->type == MPEGTS_SECTION)
346 av_freep(&filter->u.section_filter.section_buf);
347 else if (filter->type == MPEGTS_PES) {
348 PESContext *pes = filter->u.pes_filter.opaque;
349 av_freep(&pes->buffer);
350 /* referenced private data will be freed later in
351 * av_close_input_stream */
352 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
353 av_freep(&filter->u.pes_filter.opaque);
358 ts->pids[pid] = NULL;
361 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
362 int stat[TS_MAX_PACKET_SIZE];
367 memset(stat, 0, packet_size*sizeof(int));
369 for(x=i=0; i<size-3; i++){
370 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
372 if(stat[x] > best_score){
379 if(x == packet_size) x= 0;
385 /* autodetect fec presence. Must have at least 1024 bytes */
386 static int get_packet_size(const uint8_t *buf, int size)
388 int score, fec_score, dvhs_score;
390 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
393 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
394 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
395 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
396 // av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
398 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
399 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
400 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
404 typedef struct SectionHeader {
409 uint8_t last_sec_num;
412 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
425 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
431 if ((p + 1) >= p_end)
439 /* read and allocate a DVB string preceeded by its length */
440 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
447 len = get8(&p, p_end);
450 if ((p + len) > p_end)
452 str = av_malloc(len + 1);
462 static int parse_section_header(SectionHeader *h,
463 const uint8_t **pp, const uint8_t *p_end)
467 val = get8(pp, p_end);
472 val = get16(pp, p_end);
476 val = get8(pp, p_end);
479 h->version = (val >> 1) & 0x1f;
480 val = get8(pp, p_end);
484 val = get8(pp, p_end);
487 h->last_sec_num = val;
492 uint32_t stream_type;
493 enum CodecType codec_type;
494 enum CodecID codec_id;
497 static const StreamType ISO_types[] = {
498 { 0x01, CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
499 { 0x02, CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
500 { 0x03, CODEC_TYPE_AUDIO, CODEC_ID_MP3 },
501 { 0x04, CODEC_TYPE_AUDIO, CODEC_ID_MP3 },
502 { 0x0f, CODEC_TYPE_AUDIO, CODEC_ID_AAC },
503 { 0x10, CODEC_TYPE_VIDEO, CODEC_ID_MPEG4 },
504 { 0x1b, CODEC_TYPE_VIDEO, CODEC_ID_H264 },
505 { 0xd1, CODEC_TYPE_VIDEO, CODEC_ID_DIRAC },
506 { 0xea, CODEC_TYPE_VIDEO, CODEC_ID_VC1 },
510 static const StreamType HDMV_types[] = {
511 { 0x80, CODEC_TYPE_AUDIO, CODEC_ID_PCM_BLURAY },
512 { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
513 { 0x82, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
514 { 0x83, CODEC_TYPE_AUDIO, CODEC_ID_TRUEHD },
515 { 0x84, CODEC_TYPE_AUDIO, CODEC_ID_EAC3 },
516 { 0x90, CODEC_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE },
521 static const StreamType MISC_types[] = {
522 { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
523 { 0x8a, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
527 static const StreamType REGD_types[] = {
528 { MKTAG('d','r','a','c'), CODEC_TYPE_VIDEO, CODEC_ID_DIRAC },
529 { MKTAG('A','C','-','3'), CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
533 /* descriptor present */
534 static const StreamType DESC_types[] = {
535 { 0x6a, CODEC_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */
536 { 0x7a, CODEC_TYPE_AUDIO, CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
537 { 0x7b, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
538 { 0x56, CODEC_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT },
539 { 0x59, CODEC_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
543 static void mpegts_find_stream_type(AVStream *st,
544 uint32_t stream_type, const StreamType *types)
546 for (; types->stream_type; types++) {
547 if (stream_type == types->stream_type) {
548 st->codec->codec_type = types->codec_type;
549 st->codec->codec_id = types->codec_id;
555 static AVStream *new_pes_av_stream(PESContext *pes, uint32_t prog_reg_desc, uint32_t code)
557 AVStream *st = av_new_stream(pes->stream, pes->pid);
562 av_set_pts_info(st, 33, 1, 90000);
564 st->codec->codec_type = CODEC_TYPE_DATA;
565 st->codec->codec_id = CODEC_ID_NONE;
566 st->need_parsing = AVSTREAM_PARSE_FULL;
569 dprintf(pes->stream, "stream_type=%x pid=%x prog_reg_desc=%.4s\n",
570 pes->stream_type, pes->pid, (char*)&prog_reg_desc);
572 st->codec->codec_tag = pes->stream_type;
574 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
575 if (prog_reg_desc == AV_RL32("HDMV") &&
576 st->codec->codec_id == CODEC_ID_NONE) {
577 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
578 if (pes->stream_type == 0x83) {
579 // HDMV TrueHD streams also contain an AC3 coded version of the
580 // audio track - add a second stream for this
582 // priv_data cannot be shared between streams
583 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
586 memcpy(sub_pes, pes, sizeof(*sub_pes));
588 sub_st = av_new_stream(pes->stream, pes->pid);
594 av_set_pts_info(sub_st, 33, 1, 90000);
595 sub_st->priv_data = sub_pes;
596 sub_st->codec->codec_type = CODEC_TYPE_AUDIO;
597 sub_st->codec->codec_id = CODEC_ID_AC3;
598 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
599 sub_pes->sub_st = pes->sub_st = sub_st;
602 if (st->codec->codec_id == CODEC_ID_NONE)
603 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
605 /* stream was not present in PMT, guess based on PES start code */
606 if (st->codec->codec_id == CODEC_ID_NONE) {
607 if (code >= 0x1c0 && code <= 0x1df) {
608 st->codec->codec_type = CODEC_TYPE_AUDIO;
609 st->codec->codec_id = CODEC_ID_MP2;
610 } else if (code == 0x1bd) {
611 st->codec->codec_type = CODEC_TYPE_AUDIO;
612 st->codec->codec_id = CODEC_ID_AC3;
619 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
621 MpegTSContext *ts = filter->u.section_filter.opaque;
622 SectionHeader h1, *h = &h1;
625 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
626 int program_info_length, pcr_pid, pid, stream_type;
627 int desc_list_len, desc_len, desc_tag;
628 int comp_page, anc_page;
630 uint32_t prog_reg_desc = 0; /* registration descriptor */
633 dprintf(ts->stream, "PMT: len %i\n", section_len);
634 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
637 p_end = section + section_len - 4;
639 if (parse_section_header(h, &p, p_end) < 0)
642 dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n",
643 h->id, h->sec_num, h->last_sec_num);
645 if (h->tid != PMT_TID)
648 clear_program(ts, h->id);
649 pcr_pid = get16(&p, p_end) & 0x1fff;
652 add_pid_to_pmt(ts, h->id, pcr_pid);
654 dprintf(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
656 program_info_length = get16(&p, p_end) & 0xfff;
657 if (program_info_length < 0)
659 while(program_info_length >= 2) {
661 tag = get8(&p, p_end);
662 len = get8(&p, p_end);
663 if(len > program_info_length - 2)
664 //something else is broken, exit the program_descriptors_loop
666 program_info_length -= len + 2;
667 if(tag == 0x05 && len >= 4) { // registration descriptor
668 prog_reg_desc = bytestream_get_le32(&p);
673 p += program_info_length;
677 // stop parsing after pmt, we found header
678 if (!ts->stream->nb_streams)
683 stream_type = get8(&p, p_end);
686 pid = get16(&p, p_end) & 0x1fff;
690 /* now create ffmpeg stream */
691 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
692 pes = ts->pids[pid]->u.pes_filter.opaque;
695 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
696 pes = add_pes_stream(ts, pid, pcr_pid, stream_type);
698 st = new_pes_av_stream(pes, prog_reg_desc, 0);
704 add_pid_to_pmt(ts, h->id, pid);
706 av_program_add_stream_index(ts->stream, h->id, st->index);
708 desc_list_len = get16(&p, p_end) & 0xfff;
709 if (desc_list_len < 0)
711 desc_list_end = p + desc_list_len;
712 if (desc_list_end > p_end)
715 desc_tag = get8(&p, desc_list_end);
718 desc_len = get8(&p, desc_list_end);
721 desc_end = p + desc_len;
722 if (desc_end > desc_list_end)
725 dprintf(ts->stream, "tag: 0x%02x len=%d\n",
728 if (st->codec->codec_id == CODEC_ID_NONE &&
729 stream_type == STREAM_TYPE_PRIVATE_DATA)
730 mpegts_find_stream_type(st, desc_tag, DESC_types);
733 case 0x56: /* DVB teletext descriptor */
734 language[0] = get8(&p, desc_end);
735 language[1] = get8(&p, desc_end);
736 language[2] = get8(&p, desc_end);
738 av_metadata_set(&st->metadata, "language", language);
740 case 0x59: /* subtitling descriptor */
741 language[0] = get8(&p, desc_end);
742 language[1] = get8(&p, desc_end);
743 language[2] = get8(&p, desc_end);
746 comp_page = get16(&p, desc_end);
747 anc_page = get16(&p, desc_end);
748 st->codec->sub_id = (anc_page << 16) | comp_page;
749 av_metadata_set(&st->metadata, "language", language);
751 case 0x0a: /* ISO 639 language descriptor */
752 language[0] = get8(&p, desc_end);
753 language[1] = get8(&p, desc_end);
754 language[2] = get8(&p, desc_end);
756 av_metadata_set(&st->metadata, "language", language);
758 case 0x05: /* registration descriptor */
759 st->codec->codec_tag = bytestream_get_le32(&p);
760 dprintf(ts->stream, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
761 if (st->codec->codec_id == CODEC_ID_NONE &&
762 stream_type == STREAM_TYPE_PRIVATE_DATA)
763 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
770 if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
771 av_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
772 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
777 /* all parameters are there */
778 mpegts_close_filter(ts, filter);
781 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
783 MpegTSContext *ts = filter->u.section_filter.opaque;
784 SectionHeader h1, *h = &h1;
785 const uint8_t *p, *p_end;
789 dprintf(ts->stream, "PAT:\n");
790 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
792 p_end = section + section_len - 4;
794 if (parse_section_header(h, &p, p_end) < 0)
796 if (h->tid != PAT_TID)
801 sid = get16(&p, p_end);
804 pmt_pid = get16(&p, p_end) & 0x1fff;
808 dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
813 av_new_program(ts->stream, sid);
814 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
815 add_pat_entry(ts, sid);
816 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
817 add_pid_to_pmt(ts, sid, pmt_pid);
822 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
824 MpegTSContext *ts = filter->u.section_filter.opaque;
825 SectionHeader h1, *h = &h1;
826 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
827 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
828 char *name, *provider_name;
831 dprintf(ts->stream, "SDT:\n");
832 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
835 p_end = section + section_len - 4;
837 if (parse_section_header(h, &p, p_end) < 0)
839 if (h->tid != SDT_TID)
841 onid = get16(&p, p_end);
844 val = get8(&p, p_end);
848 sid = get16(&p, p_end);
851 val = get8(&p, p_end);
854 desc_list_len = get16(&p, p_end) & 0xfff;
855 if (desc_list_len < 0)
857 desc_list_end = p + desc_list_len;
858 if (desc_list_end > p_end)
861 desc_tag = get8(&p, desc_list_end);
864 desc_len = get8(&p, desc_list_end);
865 desc_end = p + desc_len;
866 if (desc_end > desc_list_end)
869 dprintf(ts->stream, "tag: 0x%02x len=%d\n",
874 service_type = get8(&p, p_end);
875 if (service_type < 0)
877 provider_name = getstr8(&p, p_end);
880 name = getstr8(&p, p_end);
882 AVProgram *program = av_new_program(ts->stream, sid);
884 av_metadata_set(&program->metadata, "name", name);
885 av_metadata_set(&program->metadata, "provider_name", provider_name);
889 av_free(provider_name);
900 static int64_t get_pts(const uint8_t *p)
902 int64_t pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
903 pts |= (AV_RB16(p + 1) >> 1) << 15;
904 pts |= AV_RB16(p + 3) >> 1;
908 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
912 pkt->destruct = av_destruct_packet;
913 pkt->data = pes->buffer;
914 pkt->size = pes->data_index;
915 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
917 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
918 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
919 pkt->stream_index = pes->sub_st->index;
921 pkt->stream_index = pes->st->index;
924 /* store position of first TS packet of this PES packet */
925 pkt->pos = pes->ts_packet_pos;
927 /* reset pts values */
928 pes->pts = AV_NOPTS_VALUE;
929 pes->dts = AV_NOPTS_VALUE;
934 /* return non zero if a packet could be constructed */
935 static int mpegts_push_data(MpegTSFilter *filter,
936 const uint8_t *buf, int buf_size, int is_start,
939 PESContext *pes = filter->u.pes_filter.opaque;
940 MpegTSContext *ts = pes->ts;
948 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
949 new_pes_packet(pes, ts->pkt);
952 pes->state = MPEGTS_HEADER;
954 pes->ts_packet_pos = pos;
957 while (buf_size > 0) {
960 len = PES_START_SIZE - pes->data_index;
963 memcpy(pes->header + pes->data_index, p, len);
964 pes->data_index += len;
967 if (pes->data_index == PES_START_SIZE) {
968 /* we got all the PES or section header. We can now
971 av_hex_dump_log(pes->stream, AV_LOG_DEBUG, pes->header, pes->data_index);
973 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
974 pes->header[2] == 0x01) {
975 /* it must be an mpeg2 PES stream */
976 code = pes->header[3] | 0x100;
977 dprintf(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
979 if ((!pes->st && pes->stream->nb_streams == MAX_STREAMS) ||
980 (pes->st && pes->st->discard == AVDISCARD_ALL) ||
981 code == 0x1be) /* padding_stream */
984 /* stream not present in PMT */
986 pes->st = new_pes_av_stream(pes, 0, code);
988 return AVERROR(ENOMEM);
990 pes->total_size = AV_RB16(pes->header + 4);
991 /* NOTE: a zero total size means the PES size is
993 if (!pes->total_size)
994 pes->total_size = MAX_PES_PAYLOAD;
996 /* allocate pes buffer */
997 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
999 return AVERROR(ENOMEM);
1001 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1002 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1003 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1004 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1005 pes->state = MPEGTS_PESHEADER;
1006 if (pes->st->codec->codec_id == CODEC_ID_NONE) {
1007 dprintf(pes->stream, "pid=%x stream_type=%x probing\n",
1008 pes->pid, pes->stream_type);
1009 pes->st->codec->codec_id = CODEC_ID_PROBE;
1012 pes->state = MPEGTS_PAYLOAD;
1013 pes->data_index = 0;
1016 /* otherwise, it should be a table */
1019 pes->state = MPEGTS_SKIP;
1024 /**********************************************/
1025 /* PES packing parsing */
1026 case MPEGTS_PESHEADER:
1027 len = PES_HEADER_SIZE - pes->data_index;
1032 memcpy(pes->header + pes->data_index, p, len);
1033 pes->data_index += len;
1036 if (pes->data_index == PES_HEADER_SIZE) {
1037 pes->pes_header_size = pes->header[8] + 9;
1038 pes->state = MPEGTS_PESHEADER_FILL;
1041 case MPEGTS_PESHEADER_FILL:
1042 len = pes->pes_header_size - pes->data_index;
1047 memcpy(pes->header + pes->data_index, p, len);
1048 pes->data_index += len;
1051 if (pes->data_index == pes->pes_header_size) {
1053 unsigned int flags, pes_ext, skip;
1055 flags = pes->header[7];
1056 r = pes->header + 9;
1057 pes->pts = AV_NOPTS_VALUE;
1058 pes->dts = AV_NOPTS_VALUE;
1059 if ((flags & 0xc0) == 0x80) {
1060 pes->dts = pes->pts = get_pts(r);
1062 } else if ((flags & 0xc0) == 0xc0) {
1063 pes->pts = get_pts(r);
1065 pes->dts = get_pts(r);
1068 pes->extended_stream_id = -1;
1069 if (flags & 0x01) { /* PES extension */
1071 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1072 skip = (pes_ext >> 4) & 0xb;
1075 if ((pes_ext & 0x41) == 0x01 &&
1076 (r + 2) <= (pes->header + pes->pes_header_size)) {
1077 /* PES extension 2 */
1078 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1079 pes->extended_stream_id = r[1];
1083 /* we got the full header. We parse it and get the payload */
1084 pes->state = MPEGTS_PAYLOAD;
1085 pes->data_index = 0;
1088 case MPEGTS_PAYLOAD:
1089 if (buf_size > 0 && pes->buffer) {
1090 if (pes->data_index+buf_size > pes->total_size) {
1091 new_pes_packet(pes, ts->pkt);
1092 pes->total_size = MAX_PES_PAYLOAD;
1093 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
1095 return AVERROR(ENOMEM);
1098 memcpy(pes->buffer+pes->data_index, p, buf_size);
1099 pes->data_index += buf_size;
1112 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type)
1117 /* if no pid found, then add a pid context */
1118 pes = av_mallocz(sizeof(PESContext));
1122 pes->stream = ts->stream;
1124 pes->pcr_pid = pcr_pid;
1125 pes->stream_type = stream_type;
1126 pes->state = MPEGTS_SKIP;
1127 pes->pts = AV_NOPTS_VALUE;
1128 pes->dts = AV_NOPTS_VALUE;
1129 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1137 /* handle one TS packet */
1138 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1140 AVFormatContext *s = ts->stream;
1142 int len, pid, cc, cc_ok, afc, is_start;
1143 const uint8_t *p, *p_end;
1146 pid = AV_RB16(packet + 1) & 0x1fff;
1147 if(pid && discard_pid(ts, pid))
1149 is_start = packet[1] & 0x40;
1150 tss = ts->pids[pid];
1151 if (ts->auto_guess && tss == NULL && is_start) {
1152 add_pes_stream(ts, pid, -1, 0);
1153 tss = ts->pids[pid];
1158 /* continuity check (currently not used) */
1159 cc = (packet[3] & 0xf);
1160 cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
1163 /* skip adaptation field */
1164 afc = (packet[3] >> 4) & 3;
1166 if (afc == 0) /* reserved value */
1168 if (afc == 2) /* adaptation field only */
1171 /* skip adapation field */
1174 /* if past the end of packet, ignore */
1175 p_end = packet + TS_PACKET_SIZE;
1179 pos = url_ftell(ts->stream->pb);
1180 ts->pos47= pos % ts->raw_packet_size;
1182 if (tss->type == MPEGTS_SECTION) {
1184 /* pointer field present */
1186 if (p + len > p_end)
1189 /* write remaining section bytes */
1190 write_section_data(s, tss,
1192 /* check whether filter has been closed */
1198 write_section_data(s, tss,
1203 write_section_data(s, tss,
1209 // Note: The position here points actually behind the current packet.
1210 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1211 pos - ts->raw_packet_size)) < 0)
1218 /* XXX: try to find a better synchro over several packets (use
1219 get_packet_size() ?) */
1220 static int mpegts_resync(AVFormatContext *s)
1222 ByteIOContext *pb = s->pb;
1225 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1230 url_fseek(pb, -1, SEEK_CUR);
1234 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1239 /* return -1 if error or EOF. Return 0 if OK. */
1240 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
1242 ByteIOContext *pb = s->pb;
1246 len = get_buffer(pb, buf, TS_PACKET_SIZE);
1247 if (len != TS_PACKET_SIZE)
1248 return AVERROR(EIO);
1249 /* check paquet sync byte */
1250 if (buf[0] != 0x47) {
1251 /* find a new packet start */
1252 url_fseek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1253 if (mpegts_resync(s) < 0)
1254 return AVERROR(EAGAIN);
1258 skip = raw_packet_size - TS_PACKET_SIZE;
1260 url_fskip(pb, skip);
1267 static int handle_packets(MpegTSContext *ts, int nb_packets)
1269 AVFormatContext *s = ts->stream;
1270 uint8_t packet[TS_PACKET_SIZE];
1271 int packet_num, ret;
1276 if (ts->stop_parse>0)
1279 if (nb_packets != 0 && packet_num >= nb_packets)
1281 ret = read_packet(s, packet, ts->raw_packet_size);
1284 ret = handle_packet(ts, packet);
1291 static int mpegts_probe(AVProbeData *p)
1294 const int size= p->buf_size;
1295 int score, fec_score, dvhs_score;
1296 int check_count= size / TS_FEC_PACKET_SIZE;
1297 #define CHECK_COUNT 10
1299 if (check_count < CHECK_COUNT)
1302 score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
1303 dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
1304 fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
1305 // av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
1307 // we need a clear definition for the returned score otherwise things will become messy sooner or later
1308 if (score > fec_score && score > dvhs_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
1309 else if(dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6) return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT;
1310 else if( fec_score > 6) return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT;
1313 /* only use the extension for safer guess */
1314 if (match_ext(p->filename, "ts"))
1315 return AVPROBE_SCORE_MAX;
1321 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
1322 (-1) if not available */
1323 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1324 const uint8_t *packet)
1326 int afc, len, flags;
1330 afc = (packet[3] >> 4) & 3;
1340 if (!(flags & 0x10))
1345 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
1346 *ppcr_low = ((p[4] & 1) << 8) | p[5];
1350 static int mpegts_read_header(AVFormatContext *s,
1351 AVFormatParameters *ap)
1353 MpegTSContext *ts = s->priv_data;
1354 ByteIOContext *pb = s->pb;
1355 uint8_t buf[5*1024];
1360 ts->mpeg2ts_compute_pcr = ap->mpeg2ts_compute_pcr;
1361 if(ap->mpeg2ts_raw){
1362 av_log(s, AV_LOG_ERROR, "use mpegtsraw_demuxer!\n");
1367 /* read the first 1024 bytes to get packet size */
1368 pos = url_ftell(pb);
1369 len = get_buffer(pb, buf, sizeof(buf));
1370 if (len != sizeof(buf))
1372 ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
1373 if (ts->raw_packet_size <= 0)
1378 if (s->iformat == &mpegts_demuxer) {
1381 /* first do a scaning to get all the services */
1382 url_fseek(pb, pos, SEEK_SET);
1384 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
1386 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
1388 handle_packets(ts, s->probesize / ts->raw_packet_size);
1389 /* if could not find service, enable auto_guess */
1393 dprintf(ts->stream, "tuning done\n");
1395 s->ctx_flags |= AVFMTCTX_NOHEADER;
1398 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
1399 int64_t pcrs[2], pcr_h;
1400 int packet_count[2];
1401 uint8_t packet[TS_PACKET_SIZE];
1403 /* only read packets */
1405 st = av_new_stream(s, 0);
1408 av_set_pts_info(st, 60, 1, 27000000);
1409 st->codec->codec_type = CODEC_TYPE_DATA;
1410 st->codec->codec_id = CODEC_ID_MPEG2TS;
1412 /* we iterate until we find two PCRs to estimate the bitrate */
1417 ret = read_packet(s, packet, ts->raw_packet_size);
1420 pid = AV_RB16(packet + 1) & 0x1fff;
1421 if ((pcr_pid == -1 || pcr_pid == pid) &&
1422 parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
1424 packet_count[nb_pcrs] = nb_packets;
1425 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
1433 /* NOTE1: the bitrate is computed without the FEC */
1434 /* NOTE2: it is only the bitrate of the start of the stream */
1435 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
1436 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
1437 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
1438 st->codec->bit_rate = s->bit_rate;
1439 st->start_time = ts->cur_pcr;
1441 av_log(ts->stream, AV_LOG_DEBUG, "start=%0.3f pcr=%0.3f incr=%d\n",
1442 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
1446 url_fseek(pb, pos, SEEK_SET);
1452 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
1454 static int mpegts_raw_read_packet(AVFormatContext *s,
1457 MpegTSContext *ts = s->priv_data;
1459 int64_t pcr_h, next_pcr_h, pos;
1460 int pcr_l, next_pcr_l;
1461 uint8_t pcr_buf[12];
1463 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
1464 return AVERROR(ENOMEM);
1465 pkt->pos= url_ftell(s->pb);
1466 ret = read_packet(s, pkt->data, ts->raw_packet_size);
1468 av_free_packet(pkt);
1471 if (ts->mpeg2ts_compute_pcr) {
1472 /* compute exact PCR for each packet */
1473 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
1474 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
1475 pos = url_ftell(s->pb);
1476 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
1477 url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
1478 get_buffer(s->pb, pcr_buf, 12);
1479 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
1480 /* XXX: not precise enough */
1481 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
1486 url_fseek(s->pb, pos, SEEK_SET);
1487 /* no next PCR found: we use previous increment */
1488 ts->cur_pcr = pcr_h * 300 + pcr_l;
1490 pkt->pts = ts->cur_pcr;
1491 pkt->duration = ts->pcr_incr;
1492 ts->cur_pcr += ts->pcr_incr;
1494 pkt->stream_index = 0;
1498 static int mpegts_read_packet(AVFormatContext *s,
1501 MpegTSContext *ts = s->priv_data;
1504 if (url_ftell(s->pb) != ts->last_pos) {
1505 /* seek detected, flush pes buffer */
1506 for (i = 0; i < NB_PID_MAX; i++) {
1507 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
1508 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1509 av_freep(&pes->buffer);
1510 pes->data_index = 0;
1511 pes->state = MPEGTS_SKIP; /* skip until pes header */
1517 ret = handle_packets(ts, 0);
1519 /* flush pes data left */
1520 for (i = 0; i < NB_PID_MAX; i++) {
1521 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
1522 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1523 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1524 new_pes_packet(pes, pkt);
1525 pes->state = MPEGTS_SKIP;
1533 ts->last_pos = url_ftell(s->pb);
1538 static int mpegts_read_close(AVFormatContext *s)
1540 MpegTSContext *ts = s->priv_data;
1545 for(i=0;i<NB_PID_MAX;i++)
1546 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
1551 static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
1552 int64_t *ppos, int64_t pos_limit)
1554 MpegTSContext *ts = s->priv_data;
1555 int64_t pos, timestamp;
1556 uint8_t buf[TS_PACKET_SIZE];
1557 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
1558 const int find_next= 1;
1559 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
1562 url_fseek(s->pb, pos, SEEK_SET);
1563 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1564 return AV_NOPTS_VALUE;
1565 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
1566 parse_pcr(×tamp, &pcr_l, buf) == 0) {
1569 pos += ts->raw_packet_size;
1573 pos -= ts->raw_packet_size;
1575 return AV_NOPTS_VALUE;
1576 url_fseek(s->pb, pos, SEEK_SET);
1577 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1578 return AV_NOPTS_VALUE;
1579 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
1580 parse_pcr(×tamp, &pcr_l, buf) == 0) {
1590 #ifdef USE_SYNCPOINT_SEARCH
1592 static int read_seek2(AVFormatContext *s,
1601 int64_t ts_ret, ts_adj;
1602 int stream_index_gen_search;
1604 AVParserState *backup;
1606 backup = ff_store_parser_state(s);
1608 // detect direction of seeking for search purposes
1609 flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ?
1610 AVSEEK_FLAG_BACKWARD : 0;
1612 if (flags & AVSEEK_FLAG_BYTE) {
1613 // use position directly, we will search starting from it
1616 // search for some position with good timestamp match
1617 if (stream_index < 0) {
1618 stream_index_gen_search = av_find_default_stream_index(s);
1619 if (stream_index_gen_search < 0) {
1620 ff_restore_parser_state(s, backup);
1624 st = s->streams[stream_index_gen_search];
1625 // timestamp for default must be expressed in AV_TIME_BASE units
1626 ts_adj = av_rescale(target_ts,
1628 AV_TIME_BASE * (int64_t)st->time_base.num);
1631 stream_index_gen_search = stream_index;
1633 pos = av_gen_search(s, stream_index_gen_search, ts_adj,
1637 flags, &ts_ret, mpegts_get_pcr);
1639 ff_restore_parser_state(s, backup);
1644 // search for actual matching keyframe/starting position for all streams
1645 if (ff_gen_syncpoint_search(s, stream_index, pos,
1646 min_ts, target_ts, max_ts,
1648 ff_restore_parser_state(s, backup);
1652 ff_free_parser_state(s, backup);
1656 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1659 if (flags & AVSEEK_FLAG_BACKWARD) {
1660 flags &= ~AVSEEK_FLAG_BACKWARD;
1661 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, target_ts, flags);
1663 // for compatibility reasons, seek to the best-fitting timestamp
1664 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
1666 ret = read_seek2(s, stream_index, target_ts, target_ts, INT64_MAX, flags);
1668 // for compatibility reasons, seek to the best-fitting timestamp
1669 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
1676 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1677 MpegTSContext *ts = s->priv_data;
1678 uint8_t buf[TS_PACKET_SIZE];
1681 if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
1684 pos= url_ftell(s->pb);
1687 url_fseek(s->pb, pos, SEEK_SET);
1688 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1690 // pid = AV_RB16(buf + 1) & 0x1fff;
1691 if(buf[1] & 0x40) break;
1692 pos += ts->raw_packet_size;
1694 url_fseek(s->pb, pos, SEEK_SET);
1701 /**************************************************************/
1702 /* parsing functions - called from other demuxers such as RTP */
1704 MpegTSContext *mpegts_parse_open(AVFormatContext *s)
1708 ts = av_mallocz(sizeof(MpegTSContext));
1711 /* no stream case, currently used by RTP */
1712 ts->raw_packet_size = TS_PACKET_SIZE;
1718 /* return the consumed length if a packet was output, or -1 if no
1720 int mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
1721 const uint8_t *buf, int len)
1729 if (ts->stop_parse>0)
1731 if (len < TS_PACKET_SIZE)
1733 if (buf[0] != 0x47) {
1737 handle_packet(ts, buf);
1738 buf += TS_PACKET_SIZE;
1739 len -= TS_PACKET_SIZE;
1745 void mpegts_parse_close(MpegTSContext *ts)
1749 for(i=0;i<NB_PID_MAX;i++)
1750 av_free(ts->pids[i]);
1754 AVInputFormat mpegts_demuxer = {
1756 NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
1757 sizeof(MpegTSContext),
1764 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
1765 #ifdef USE_SYNCPOINT_SEARCH
1766 .read_seek2 = read_seek2,
1770 AVInputFormat mpegtsraw_demuxer = {
1772 NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
1773 sizeof(MpegTSContext),
1776 mpegts_raw_read_packet,
1780 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
1781 #ifdef USE_SYNCPOINT_SEARCH
1782 .read_seek2 = read_seek2,