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 enum MpegTSFilterType {
48 typedef struct MpegTSFilter MpegTSFilter;
50 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
52 typedef struct MpegTSPESFilter {
57 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
59 typedef void SetServiceCallback(void *opaque, int ret);
61 typedef struct MpegTSSectionFilter {
65 unsigned int check_crc:1;
66 unsigned int end_of_section_reached:1;
67 SectionCallback *section_cb;
69 } MpegTSSectionFilter;
73 int last_cc; /* last cc code (-1 if first packet) */
74 enum MpegTSFilterType type;
76 MpegTSPESFilter pes_filter;
77 MpegTSSectionFilter section_filter;
81 #define MAX_PIDS_PER_PROGRAM 64
83 unsigned int id; //program id/service id
85 unsigned int pids[MAX_PIDS_PER_PROGRAM];
88 struct MpegTSContext {
90 AVFormatContext *stream;
91 /** raw packet size, including FEC if present */
96 /** if true, all pids are analyzed to find streams */
99 /** compute exact PCR for each transport stream packet */
100 int mpeg2ts_compute_pcr;
102 int64_t cur_pcr; /**< used to estimate the exact PCR */
103 int pcr_incr; /**< used to estimate the exact PCR */
105 /* data needed to handle file based ts */
106 /** stop parsing loop */
108 /** packet containing Audio/Video data */
110 /** to detect seek */
113 /******************************************/
114 /* private mpegts data */
116 /** structure to keep track of Program->pids mapping */
121 /** filters for various streams specified by PMT + for the PAT and PMT */
122 MpegTSFilter *pids[NB_PID_MAX];
125 /* TS stream handling */
130 MPEGTS_PESHEADER_FILL,
135 /* enough for PES header + length */
136 #define PES_START_SIZE 6
137 #define PES_HEADER_SIZE 9
138 #define MAX_PES_HEADER_SIZE (9 + 255)
140 typedef struct PESContext {
142 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
145 AVFormatContext *stream;
147 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
148 enum MpegTSState state;
149 /* used to get the format */
153 int extended_stream_id;
155 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
156 uint8_t header[MAX_PES_HEADER_SIZE];
160 extern AVInputFormat mpegts_demuxer;
162 static void clear_program(MpegTSContext *ts, unsigned int programid)
166 for(i=0; i<ts->nb_prg; i++)
167 if(ts->prg[i].id == programid)
168 ts->prg[i].nb_pids = 0;
171 static void clear_programs(MpegTSContext *ts)
177 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
180 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
184 p = &ts->prg[ts->nb_prg];
190 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
193 struct Program *p = NULL;
194 for(i=0; i<ts->nb_prg; i++) {
195 if(ts->prg[i].id == programid) {
203 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
205 p->pids[p->nb_pids++] = pid;
209 * \brief discard_pid() decides if the pid is to be discarded according
210 * to caller's programs selection
211 * \param ts : - TS context
213 * \return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
216 static int discard_pid(MpegTSContext *ts, unsigned int pid)
219 int used = 0, discarded = 0;
221 for(i=0; i<ts->nb_prg; i++) {
223 for(j=0; j<p->nb_pids; j++) {
224 if(p->pids[j] != pid)
226 //is program with id p->id set to be discarded?
227 for(k=0; k<ts->stream->nb_programs; k++) {
228 if(ts->stream->programs[k]->id == p->id) {
229 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
238 return !used && discarded;
242 * Assemble PES packets out of TS packets, and then call the "section_cb"
243 * function when they are complete.
245 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
246 const uint8_t *buf, int buf_size, int is_start)
248 MpegTSSectionFilter *tss = &tss1->u.section_filter;
252 memcpy(tss->section_buf, buf, buf_size);
253 tss->section_index = buf_size;
254 tss->section_h_size = -1;
255 tss->end_of_section_reached = 0;
257 if (tss->end_of_section_reached)
259 len = 4096 - tss->section_index;
262 memcpy(tss->section_buf + tss->section_index, buf, len);
263 tss->section_index += len;
266 /* compute section length if possible */
267 if (tss->section_h_size == -1 && tss->section_index >= 3) {
268 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
271 tss->section_h_size = len;
274 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
275 tss->end_of_section_reached = 1;
276 if (!tss->check_crc ||
277 av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
278 tss->section_buf, tss->section_h_size) == 0)
279 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
283 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
284 SectionCallback *section_cb, void *opaque,
288 MpegTSFilter *filter;
289 MpegTSSectionFilter *sec;
291 dprintf(ts->stream, "Filter: pid=0x%x\n", pid);
293 if (pid >= NB_PID_MAX || ts->pids[pid])
295 filter = av_mallocz(sizeof(MpegTSFilter));
298 ts->pids[pid] = filter;
299 filter->type = MPEGTS_SECTION;
301 filter->last_cc = -1;
302 sec = &filter->u.section_filter;
303 sec->section_cb = section_cb;
304 sec->opaque = opaque;
305 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
306 sec->check_crc = check_crc;
307 if (!sec->section_buf) {
314 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
318 MpegTSFilter *filter;
319 MpegTSPESFilter *pes;
321 if (pid >= NB_PID_MAX || ts->pids[pid])
323 filter = av_mallocz(sizeof(MpegTSFilter));
326 ts->pids[pid] = filter;
327 filter->type = MPEGTS_PES;
329 filter->last_cc = -1;
330 pes = &filter->u.pes_filter;
331 pes->pes_cb = pes_cb;
332 pes->opaque = opaque;
336 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
341 if (filter->type == MPEGTS_SECTION)
342 av_freep(&filter->u.section_filter.section_buf);
343 else if (filter->type == MPEGTS_PES) {
344 PESContext *pes = filter->u.pes_filter.opaque;
345 av_freep(&pes->buffer);
346 /* referenced private data will be freed later in
347 * av_close_input_stream */
348 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
349 av_freep(&filter->u.pes_filter.opaque);
354 ts->pids[pid] = NULL;
357 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
358 int stat[TS_MAX_PACKET_SIZE];
363 memset(stat, 0, packet_size*sizeof(int));
365 for(x=i=0; i<size-3; i++){
366 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
368 if(stat[x] > best_score){
375 if(x == packet_size) x= 0;
381 /* autodetect fec presence. Must have at least 1024 bytes */
382 static int get_packet_size(const uint8_t *buf, int size)
384 int score, fec_score, dvhs_score;
386 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
389 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
390 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
391 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
392 // av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
394 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
395 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
396 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
400 typedef struct SectionHeader {
405 uint8_t last_sec_num;
408 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
421 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
427 if ((p + 1) >= p_end)
435 /* read and allocate a DVB string preceeded by its length */
436 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
443 len = get8(&p, p_end);
446 if ((p + len) > p_end)
448 str = av_malloc(len + 1);
458 static int parse_section_header(SectionHeader *h,
459 const uint8_t **pp, const uint8_t *p_end)
463 val = get8(pp, p_end);
468 val = get16(pp, p_end);
472 val = get8(pp, p_end);
475 h->version = (val >> 1) & 0x1f;
476 val = get8(pp, p_end);
480 val = get8(pp, p_end);
483 h->last_sec_num = val;
488 uint32_t stream_type;
489 enum AVMediaType codec_type;
490 enum CodecID codec_id;
493 static const StreamType ISO_types[] = {
494 { 0x01, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
495 { 0x02, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
496 { 0x03, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
497 { 0x04, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
498 { 0x0f, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC },
499 { 0x10, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG4 },
500 //{ 0x11, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC }, /* LATM syntax */
501 { 0x1b, AVMEDIA_TYPE_VIDEO, CODEC_ID_H264 },
502 { 0xd1, AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
503 { 0xea, AVMEDIA_TYPE_VIDEO, CODEC_ID_VC1 },
507 static const StreamType HDMV_types[] = {
508 { 0x80, AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_BLURAY },
509 { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
510 { 0x82, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
511 { 0x83, AVMEDIA_TYPE_AUDIO, CODEC_ID_TRUEHD },
512 { 0x84, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 },
513 { 0x90, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE },
518 static const StreamType MISC_types[] = {
519 { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
520 { 0x8a, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
524 static const StreamType REGD_types[] = {
525 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
526 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
530 /* descriptor present */
531 static const StreamType DESC_types[] = {
532 { 0x6a, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */
533 { 0x7a, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
534 { 0x7b, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
535 { 0x56, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT },
536 { 0x59, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
540 static void mpegts_find_stream_type(AVStream *st,
541 uint32_t stream_type, const StreamType *types)
543 for (; types->stream_type; types++) {
544 if (stream_type == types->stream_type) {
545 st->codec->codec_type = types->codec_type;
546 st->codec->codec_id = types->codec_id;
552 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
553 uint32_t stream_type, uint32_t prog_reg_desc)
555 av_set_pts_info(st, 33, 1, 90000);
557 st->codec->codec_type = AVMEDIA_TYPE_DATA;
558 st->codec->codec_id = CODEC_ID_NONE;
559 st->need_parsing = AVSTREAM_PARSE_FULL;
561 pes->stream_type = stream_type;
563 av_log(pes->stream, AV_LOG_DEBUG,
564 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
565 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
567 st->codec->codec_tag = pes->stream_type;
569 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
570 if (prog_reg_desc == AV_RL32("HDMV") &&
571 st->codec->codec_id == CODEC_ID_NONE) {
572 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
573 if (pes->stream_type == 0x83) {
574 // HDMV TrueHD streams also contain an AC3 coded version of the
575 // audio track - add a second stream for this
577 // priv_data cannot be shared between streams
578 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
580 return AVERROR(ENOMEM);
581 memcpy(sub_pes, pes, sizeof(*sub_pes));
583 sub_st = av_new_stream(pes->stream, pes->pid);
586 return AVERROR(ENOMEM);
589 av_set_pts_info(sub_st, 33, 1, 90000);
590 sub_st->priv_data = sub_pes;
591 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
592 sub_st->codec->codec_id = CODEC_ID_AC3;
593 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
594 sub_pes->sub_st = pes->sub_st = sub_st;
597 if (pes->stream_type == 0x11)
598 av_log(pes->stream, AV_LOG_WARNING,
599 "AAC LATM not currently supported, patch welcome\n");
600 if (st->codec->codec_id == CODEC_ID_NONE)
601 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
606 static int64_t get_pts(const uint8_t *p)
608 int64_t pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
609 pts |= (AV_RB16(p + 1) >> 1) << 15;
610 pts |= AV_RB16(p + 3) >> 1;
614 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
618 pkt->destruct = av_destruct_packet;
619 pkt->data = pes->buffer;
620 pkt->size = pes->data_index;
621 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
623 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
624 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
625 pkt->stream_index = pes->sub_st->index;
627 pkt->stream_index = pes->st->index;
630 /* store position of first TS packet of this PES packet */
631 pkt->pos = pes->ts_packet_pos;
633 /* reset pts values */
634 pes->pts = AV_NOPTS_VALUE;
635 pes->dts = AV_NOPTS_VALUE;
640 /* return non zero if a packet could be constructed */
641 static int mpegts_push_data(MpegTSFilter *filter,
642 const uint8_t *buf, int buf_size, int is_start,
645 PESContext *pes = filter->u.pes_filter.opaque;
646 MpegTSContext *ts = pes->ts;
654 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
655 new_pes_packet(pes, ts->pkt);
658 pes->state = MPEGTS_HEADER;
660 pes->ts_packet_pos = pos;
663 while (buf_size > 0) {
666 len = PES_START_SIZE - pes->data_index;
669 memcpy(pes->header + pes->data_index, p, len);
670 pes->data_index += len;
673 if (pes->data_index == PES_START_SIZE) {
674 /* we got all the PES or section header. We can now
677 av_hex_dump_log(pes->stream, AV_LOG_DEBUG, pes->header, pes->data_index);
679 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
680 pes->header[2] == 0x01) {
681 /* it must be an mpeg2 PES stream */
682 code = pes->header[3] | 0x100;
683 dprintf(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
685 if ((pes->st && pes->st->discard == AVDISCARD_ALL) ||
686 code == 0x1be) /* padding_stream */
689 #if FF_API_MAX_STREAMS
690 if (!pes->st && pes->stream->nb_streams == MAX_STREAMS)
694 /* stream not present in PMT */
696 pes->st = av_new_stream(ts->stream, pes->pid);
698 return AVERROR(ENOMEM);
699 mpegts_set_stream_info(pes->st, pes, 0, 0);
702 pes->total_size = AV_RB16(pes->header + 4);
703 /* NOTE: a zero total size means the PES size is
705 if (!pes->total_size)
706 pes->total_size = MAX_PES_PAYLOAD;
708 /* allocate pes buffer */
709 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
711 return AVERROR(ENOMEM);
713 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
714 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
715 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
716 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
717 pes->state = MPEGTS_PESHEADER;
718 if (pes->st->codec->codec_id == CODEC_ID_NONE) {
719 dprintf(pes->stream, "pid=%x stream_type=%x probing\n",
720 pes->pid, pes->stream_type);
721 pes->st->codec->codec_id = CODEC_ID_PROBE;
724 pes->state = MPEGTS_PAYLOAD;
728 /* otherwise, it should be a table */
731 pes->state = MPEGTS_SKIP;
736 /**********************************************/
737 /* PES packing parsing */
738 case MPEGTS_PESHEADER:
739 len = PES_HEADER_SIZE - pes->data_index;
744 memcpy(pes->header + pes->data_index, p, len);
745 pes->data_index += len;
748 if (pes->data_index == PES_HEADER_SIZE) {
749 pes->pes_header_size = pes->header[8] + 9;
750 pes->state = MPEGTS_PESHEADER_FILL;
753 case MPEGTS_PESHEADER_FILL:
754 len = pes->pes_header_size - pes->data_index;
759 memcpy(pes->header + pes->data_index, p, len);
760 pes->data_index += len;
763 if (pes->data_index == pes->pes_header_size) {
765 unsigned int flags, pes_ext, skip;
767 flags = pes->header[7];
769 pes->pts = AV_NOPTS_VALUE;
770 pes->dts = AV_NOPTS_VALUE;
771 if ((flags & 0xc0) == 0x80) {
772 pes->dts = pes->pts = get_pts(r);
774 } else if ((flags & 0xc0) == 0xc0) {
775 pes->pts = get_pts(r);
777 pes->dts = get_pts(r);
780 pes->extended_stream_id = -1;
781 if (flags & 0x01) { /* PES extension */
783 /* Skip PES private data, program packet sequence counter and P-STD buffer */
784 skip = (pes_ext >> 4) & 0xb;
787 if ((pes_ext & 0x41) == 0x01 &&
788 (r + 2) <= (pes->header + pes->pes_header_size)) {
789 /* PES extension 2 */
790 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
791 pes->extended_stream_id = r[1];
795 /* we got the full header. We parse it and get the payload */
796 pes->state = MPEGTS_PAYLOAD;
801 if (buf_size > 0 && pes->buffer) {
802 if (pes->data_index+buf_size > pes->total_size) {
803 new_pes_packet(pes, ts->pkt);
804 pes->total_size = MAX_PES_PAYLOAD;
805 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
807 return AVERROR(ENOMEM);
810 memcpy(pes->buffer+pes->data_index, p, buf_size);
811 pes->data_index += buf_size;
814 /* emit complete packets with known packet size
815 * decreases demuxer delay for infrequent packets like subtitles from
816 * a couple of seconds to milliseconds for properly muxed files.
817 * total_size is the number of bytes following pes_packet_length
818 * in the pes header, i.e. not counting the first 6 bytes */
819 if (pes->total_size < MAX_PES_PAYLOAD &&
820 pes->pes_header_size + pes->data_index == pes->total_size + 6) {
822 new_pes_packet(pes, ts->pkt);
834 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
839 /* if no pid found, then add a pid context */
840 pes = av_mallocz(sizeof(PESContext));
844 pes->stream = ts->stream;
846 pes->pcr_pid = pcr_pid;
847 pes->state = MPEGTS_SKIP;
848 pes->pts = AV_NOPTS_VALUE;
849 pes->dts = AV_NOPTS_VALUE;
850 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
858 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
860 MpegTSContext *ts = filter->u.section_filter.opaque;
861 SectionHeader h1, *h = &h1;
864 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
865 int program_info_length, pcr_pid, pid, stream_type;
866 int desc_list_len, desc_len, desc_tag;
868 uint32_t prog_reg_desc = 0; /* registration descriptor */
871 dprintf(ts->stream, "PMT: len %i\n", section_len);
872 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
875 p_end = section + section_len - 4;
877 if (parse_section_header(h, &p, p_end) < 0)
880 dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n",
881 h->id, h->sec_num, h->last_sec_num);
883 if (h->tid != PMT_TID)
886 clear_program(ts, h->id);
887 pcr_pid = get16(&p, p_end) & 0x1fff;
890 add_pid_to_pmt(ts, h->id, pcr_pid);
892 dprintf(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
894 program_info_length = get16(&p, p_end) & 0xfff;
895 if (program_info_length < 0)
897 while(program_info_length >= 2) {
899 tag = get8(&p, p_end);
900 len = get8(&p, p_end);
901 if(len > program_info_length - 2)
902 //something else is broken, exit the program_descriptors_loop
904 program_info_length -= len + 2;
905 if(tag == 0x05 && len >= 4) { // registration descriptor
906 prog_reg_desc = bytestream_get_le32(&p);
911 p += program_info_length;
915 // stop parsing after pmt, we found header
916 if (!ts->stream->nb_streams)
921 stream_type = get8(&p, p_end);
924 pid = get16(&p, p_end) & 0x1fff;
928 /* now create ffmpeg stream */
929 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
930 pes = ts->pids[pid]->u.pes_filter.opaque;
933 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
934 pes = add_pes_stream(ts, pid, pcr_pid);
936 st = av_new_stream(pes->stream, pes->pid);
942 if (!pes->stream_type)
943 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
945 add_pid_to_pmt(ts, h->id, pid);
947 ff_program_add_stream_index(ts->stream, h->id, st->index);
949 desc_list_len = get16(&p, p_end) & 0xfff;
950 if (desc_list_len < 0)
952 desc_list_end = p + desc_list_len;
953 if (desc_list_end > p_end)
956 desc_tag = get8(&p, desc_list_end);
959 desc_len = get8(&p, desc_list_end);
962 desc_end = p + desc_len;
963 if (desc_end > desc_list_end)
966 dprintf(ts->stream, "tag: 0x%02x len=%d\n",
969 if (st->codec->codec_id == CODEC_ID_NONE &&
970 stream_type == STREAM_TYPE_PRIVATE_DATA)
971 mpegts_find_stream_type(st, desc_tag, DESC_types);
974 case 0x56: /* DVB teletext descriptor */
975 language[0] = get8(&p, desc_end);
976 language[1] = get8(&p, desc_end);
977 language[2] = get8(&p, desc_end);
979 av_metadata_set2(&st->metadata, "language", language, 0);
981 case 0x59: /* subtitling descriptor */
982 language[0] = get8(&p, desc_end);
983 language[1] = get8(&p, desc_end);
984 language[2] = get8(&p, desc_end);
987 if (st->codec->extradata) {
988 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, p, 4))
989 av_log_ask_for_sample(ts->stream, "DVB sub with multiple IDs\n");
991 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
992 if (st->codec->extradata) {
993 st->codec->extradata_size = 4;
994 memcpy(st->codec->extradata, p, 4);
998 av_metadata_set2(&st->metadata, "language", language, 0);
1000 case 0x0a: /* ISO 639 language descriptor */
1001 language[0] = get8(&p, desc_end);
1002 language[1] = get8(&p, desc_end);
1003 language[2] = get8(&p, desc_end);
1005 av_metadata_set2(&st->metadata, "language", language, 0);
1007 case 0x05: /* registration descriptor */
1008 st->codec->codec_tag = bytestream_get_le32(&p);
1009 dprintf(ts->stream, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
1010 if (st->codec->codec_id == CODEC_ID_NONE &&
1011 stream_type == STREAM_TYPE_PRIVATE_DATA)
1012 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1019 if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
1020 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
1021 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1026 /* all parameters are there */
1027 mpegts_close_filter(ts, filter);
1030 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1032 MpegTSContext *ts = filter->u.section_filter.opaque;
1033 SectionHeader h1, *h = &h1;
1034 const uint8_t *p, *p_end;
1038 dprintf(ts->stream, "PAT:\n");
1039 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
1041 p_end = section + section_len - 4;
1043 if (parse_section_header(h, &p, p_end) < 0)
1045 if (h->tid != PAT_TID)
1050 sid = get16(&p, p_end);
1053 pmt_pid = get16(&p, p_end) & 0x1fff;
1057 dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1059 if (sid == 0x0000) {
1062 av_new_program(ts->stream, sid);
1063 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1064 add_pat_entry(ts, sid);
1065 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
1066 add_pid_to_pmt(ts, sid, pmt_pid);
1071 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1073 MpegTSContext *ts = filter->u.section_filter.opaque;
1074 SectionHeader h1, *h = &h1;
1075 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1076 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1077 char *name, *provider_name;
1080 dprintf(ts->stream, "SDT:\n");
1081 av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
1084 p_end = section + section_len - 4;
1086 if (parse_section_header(h, &p, p_end) < 0)
1088 if (h->tid != SDT_TID)
1090 onid = get16(&p, p_end);
1093 val = get8(&p, p_end);
1097 sid = get16(&p, p_end);
1100 val = get8(&p, p_end);
1103 desc_list_len = get16(&p, p_end) & 0xfff;
1104 if (desc_list_len < 0)
1106 desc_list_end = p + desc_list_len;
1107 if (desc_list_end > p_end)
1110 desc_tag = get8(&p, desc_list_end);
1113 desc_len = get8(&p, desc_list_end);
1114 desc_end = p + desc_len;
1115 if (desc_end > desc_list_end)
1118 dprintf(ts->stream, "tag: 0x%02x len=%d\n",
1119 desc_tag, desc_len);
1123 service_type = get8(&p, p_end);
1124 if (service_type < 0)
1126 provider_name = getstr8(&p, p_end);
1129 name = getstr8(&p, p_end);
1131 AVProgram *program = av_new_program(ts->stream, sid);
1133 av_metadata_set2(&program->metadata, "name", name, 0);
1134 av_metadata_set2(&program->metadata, "provider_name", provider_name, 0);
1138 av_free(provider_name);
1149 /* handle one TS packet */
1150 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1152 AVFormatContext *s = ts->stream;
1154 int len, pid, cc, cc_ok, afc, is_start;
1155 const uint8_t *p, *p_end;
1158 pid = AV_RB16(packet + 1) & 0x1fff;
1159 if(pid && discard_pid(ts, pid))
1161 is_start = packet[1] & 0x40;
1162 tss = ts->pids[pid];
1163 if (ts->auto_guess && tss == NULL && is_start) {
1164 add_pes_stream(ts, pid, -1);
1165 tss = ts->pids[pid];
1170 /* continuity check (currently not used) */
1171 cc = (packet[3] & 0xf);
1172 cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
1175 /* skip adaptation field */
1176 afc = (packet[3] >> 4) & 3;
1178 if (afc == 0) /* reserved value */
1180 if (afc == 2) /* adaptation field only */
1183 /* skip adapation field */
1186 /* if past the end of packet, ignore */
1187 p_end = packet + TS_PACKET_SIZE;
1191 pos = url_ftell(ts->stream->pb);
1192 ts->pos47= pos % ts->raw_packet_size;
1194 if (tss->type == MPEGTS_SECTION) {
1196 /* pointer field present */
1198 if (p + len > p_end)
1201 /* write remaining section bytes */
1202 write_section_data(s, tss,
1204 /* check whether filter has been closed */
1210 write_section_data(s, tss,
1215 write_section_data(s, tss,
1221 // Note: The position here points actually behind the current packet.
1222 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1223 pos - ts->raw_packet_size)) < 0)
1230 /* XXX: try to find a better synchro over several packets (use
1231 get_packet_size() ?) */
1232 static int mpegts_resync(AVFormatContext *s)
1234 ByteIOContext *pb = s->pb;
1237 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1242 url_fseek(pb, -1, SEEK_CUR);
1246 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1251 /* return -1 if error or EOF. Return 0 if OK. */
1252 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
1254 ByteIOContext *pb = s->pb;
1258 len = get_buffer(pb, buf, TS_PACKET_SIZE);
1259 if (len != TS_PACKET_SIZE)
1260 return AVERROR(EIO);
1261 /* check paquet sync byte */
1262 if (buf[0] != 0x47) {
1263 /* find a new packet start */
1264 url_fseek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1265 if (mpegts_resync(s) < 0)
1266 return AVERROR(EAGAIN);
1270 skip = raw_packet_size - TS_PACKET_SIZE;
1272 url_fskip(pb, skip);
1279 static int handle_packets(MpegTSContext *ts, int nb_packets)
1281 AVFormatContext *s = ts->stream;
1282 uint8_t packet[TS_PACKET_SIZE];
1283 int packet_num, ret;
1288 if (ts->stop_parse>0)
1291 if (nb_packets != 0 && packet_num >= nb_packets)
1293 ret = read_packet(s, packet, ts->raw_packet_size);
1296 ret = handle_packet(ts, packet);
1303 static int mpegts_probe(AVProbeData *p)
1306 const int size= p->buf_size;
1307 int score, fec_score, dvhs_score;
1308 int check_count= size / TS_FEC_PACKET_SIZE;
1309 #define CHECK_COUNT 10
1311 if (check_count < CHECK_COUNT)
1314 score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
1315 dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
1316 fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
1317 // av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
1319 // we need a clear definition for the returned score otherwise things will become messy sooner or later
1320 if (score > fec_score && score > dvhs_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
1321 else if(dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6) return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT;
1322 else if( fec_score > 6) return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT;
1325 /* only use the extension for safer guess */
1326 if (av_match_ext(p->filename, "ts"))
1327 return AVPROBE_SCORE_MAX;
1333 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
1334 (-1) if not available */
1335 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1336 const uint8_t *packet)
1338 int afc, len, flags;
1342 afc = (packet[3] >> 4) & 3;
1352 if (!(flags & 0x10))
1357 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
1358 *ppcr_low = ((p[4] & 1) << 8) | p[5];
1362 static int mpegts_read_header(AVFormatContext *s,
1363 AVFormatParameters *ap)
1365 MpegTSContext *ts = s->priv_data;
1366 ByteIOContext *pb = s->pb;
1367 uint8_t buf[5*1024];
1372 ts->mpeg2ts_compute_pcr = ap->mpeg2ts_compute_pcr;
1373 if(ap->mpeg2ts_raw){
1374 av_log(s, AV_LOG_ERROR, "use mpegtsraw_demuxer!\n");
1379 /* read the first 1024 bytes to get packet size */
1380 pos = url_ftell(pb);
1381 len = get_buffer(pb, buf, sizeof(buf));
1382 if (len != sizeof(buf))
1384 ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
1385 if (ts->raw_packet_size <= 0)
1390 if (s->iformat == &mpegts_demuxer) {
1393 /* first do a scaning to get all the services */
1394 if (url_fseek(pb, pos, SEEK_SET) < 0)
1395 av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
1397 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
1399 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
1401 handle_packets(ts, s->probesize / ts->raw_packet_size);
1402 /* if could not find service, enable auto_guess */
1406 dprintf(ts->stream, "tuning done\n");
1408 s->ctx_flags |= AVFMTCTX_NOHEADER;
1411 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
1412 int64_t pcrs[2], pcr_h;
1413 int packet_count[2];
1414 uint8_t packet[TS_PACKET_SIZE];
1416 /* only read packets */
1418 st = av_new_stream(s, 0);
1421 av_set_pts_info(st, 60, 1, 27000000);
1422 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1423 st->codec->codec_id = CODEC_ID_MPEG2TS;
1425 /* we iterate until we find two PCRs to estimate the bitrate */
1430 ret = read_packet(s, packet, ts->raw_packet_size);
1433 pid = AV_RB16(packet + 1) & 0x1fff;
1434 if ((pcr_pid == -1 || pcr_pid == pid) &&
1435 parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
1437 packet_count[nb_pcrs] = nb_packets;
1438 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
1446 /* NOTE1: the bitrate is computed without the FEC */
1447 /* NOTE2: it is only the bitrate of the start of the stream */
1448 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
1449 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
1450 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
1451 st->codec->bit_rate = s->bit_rate;
1452 st->start_time = ts->cur_pcr;
1454 av_log(ts->stream, AV_LOG_DEBUG, "start=%0.3f pcr=%0.3f incr=%d\n",
1455 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
1459 url_fseek(pb, pos, SEEK_SET);
1465 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
1467 static int mpegts_raw_read_packet(AVFormatContext *s,
1470 MpegTSContext *ts = s->priv_data;
1472 int64_t pcr_h, next_pcr_h, pos;
1473 int pcr_l, next_pcr_l;
1474 uint8_t pcr_buf[12];
1476 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
1477 return AVERROR(ENOMEM);
1478 pkt->pos= url_ftell(s->pb);
1479 ret = read_packet(s, pkt->data, ts->raw_packet_size);
1481 av_free_packet(pkt);
1484 if (ts->mpeg2ts_compute_pcr) {
1485 /* compute exact PCR for each packet */
1486 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
1487 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
1488 pos = url_ftell(s->pb);
1489 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
1490 url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
1491 get_buffer(s->pb, pcr_buf, 12);
1492 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
1493 /* XXX: not precise enough */
1494 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
1499 url_fseek(s->pb, pos, SEEK_SET);
1500 /* no next PCR found: we use previous increment */
1501 ts->cur_pcr = pcr_h * 300 + pcr_l;
1503 pkt->pts = ts->cur_pcr;
1504 pkt->duration = ts->pcr_incr;
1505 ts->cur_pcr += ts->pcr_incr;
1507 pkt->stream_index = 0;
1511 static int mpegts_read_packet(AVFormatContext *s,
1514 MpegTSContext *ts = s->priv_data;
1517 if (url_ftell(s->pb) != ts->last_pos) {
1518 /* seek detected, flush pes buffer */
1519 for (i = 0; i < NB_PID_MAX; i++) {
1520 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
1521 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1522 av_freep(&pes->buffer);
1523 pes->data_index = 0;
1524 pes->state = MPEGTS_SKIP; /* skip until pes header */
1530 ret = handle_packets(ts, 0);
1532 /* flush pes data left */
1533 for (i = 0; i < NB_PID_MAX; i++) {
1534 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
1535 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1536 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1537 new_pes_packet(pes, pkt);
1538 pes->state = MPEGTS_SKIP;
1546 ts->last_pos = url_ftell(s->pb);
1551 static int mpegts_read_close(AVFormatContext *s)
1553 MpegTSContext *ts = s->priv_data;
1558 for(i=0;i<NB_PID_MAX;i++)
1559 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
1564 static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
1565 int64_t *ppos, int64_t pos_limit)
1567 MpegTSContext *ts = s->priv_data;
1568 int64_t pos, timestamp;
1569 uint8_t buf[TS_PACKET_SIZE];
1570 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
1571 const int find_next= 1;
1572 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
1575 url_fseek(s->pb, pos, SEEK_SET);
1576 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1577 return AV_NOPTS_VALUE;
1578 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
1579 parse_pcr(×tamp, &pcr_l, buf) == 0) {
1582 pos += ts->raw_packet_size;
1586 pos -= ts->raw_packet_size;
1588 return AV_NOPTS_VALUE;
1589 url_fseek(s->pb, pos, SEEK_SET);
1590 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1591 return AV_NOPTS_VALUE;
1592 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
1593 parse_pcr(×tamp, &pcr_l, buf) == 0) {
1603 #ifdef USE_SYNCPOINT_SEARCH
1605 static int read_seek2(AVFormatContext *s,
1614 int64_t ts_ret, ts_adj;
1615 int stream_index_gen_search;
1617 AVParserState *backup;
1619 backup = ff_store_parser_state(s);
1621 // detect direction of seeking for search purposes
1622 flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ?
1623 AVSEEK_FLAG_BACKWARD : 0;
1625 if (flags & AVSEEK_FLAG_BYTE) {
1626 // use position directly, we will search starting from it
1629 // search for some position with good timestamp match
1630 if (stream_index < 0) {
1631 stream_index_gen_search = av_find_default_stream_index(s);
1632 if (stream_index_gen_search < 0) {
1633 ff_restore_parser_state(s, backup);
1637 st = s->streams[stream_index_gen_search];
1638 // timestamp for default must be expressed in AV_TIME_BASE units
1639 ts_adj = av_rescale(target_ts,
1641 AV_TIME_BASE * (int64_t)st->time_base.num);
1644 stream_index_gen_search = stream_index;
1646 pos = av_gen_search(s, stream_index_gen_search, ts_adj,
1650 flags, &ts_ret, mpegts_get_pcr);
1652 ff_restore_parser_state(s, backup);
1657 // search for actual matching keyframe/starting position for all streams
1658 if (ff_gen_syncpoint_search(s, stream_index, pos,
1659 min_ts, target_ts, max_ts,
1661 ff_restore_parser_state(s, backup);
1665 ff_free_parser_state(s, backup);
1669 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1672 if (flags & AVSEEK_FLAG_BACKWARD) {
1673 flags &= ~AVSEEK_FLAG_BACKWARD;
1674 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, target_ts, flags);
1676 // for compatibility reasons, seek to the best-fitting timestamp
1677 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
1679 ret = read_seek2(s, stream_index, target_ts, target_ts, INT64_MAX, flags);
1681 // for compatibility reasons, seek to the best-fitting timestamp
1682 ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
1689 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1690 MpegTSContext *ts = s->priv_data;
1691 uint8_t buf[TS_PACKET_SIZE];
1694 if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
1697 pos= url_ftell(s->pb);
1700 url_fseek(s->pb, pos, SEEK_SET);
1701 if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
1703 // pid = AV_RB16(buf + 1) & 0x1fff;
1704 if(buf[1] & 0x40) break;
1705 pos += ts->raw_packet_size;
1707 url_fseek(s->pb, pos, SEEK_SET);
1714 /**************************************************************/
1715 /* parsing functions - called from other demuxers such as RTP */
1717 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
1721 ts = av_mallocz(sizeof(MpegTSContext));
1724 /* no stream case, currently used by RTP */
1725 ts->raw_packet_size = TS_PACKET_SIZE;
1731 /* return the consumed length if a packet was output, or -1 if no
1733 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
1734 const uint8_t *buf, int len)
1742 if (ts->stop_parse>0)
1744 if (len < TS_PACKET_SIZE)
1746 if (buf[0] != 0x47) {
1750 handle_packet(ts, buf);
1751 buf += TS_PACKET_SIZE;
1752 len -= TS_PACKET_SIZE;
1758 void ff_mpegts_parse_close(MpegTSContext *ts)
1762 for(i=0;i<NB_PID_MAX;i++)
1763 av_free(ts->pids[i]);
1767 AVInputFormat mpegts_demuxer = {
1769 NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
1770 sizeof(MpegTSContext),
1777 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
1778 #ifdef USE_SYNCPOINT_SEARCH
1779 .read_seek2 = read_seek2,
1783 AVInputFormat mpegtsraw_demuxer = {
1785 NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
1786 sizeof(MpegTSContext),
1789 mpegts_raw_read_packet,
1793 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
1794 #ifdef USE_SYNCPOINT_SEARCH
1795 .read_seek2 = read_seek2,