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
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/log.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/avassert.h"
30 #include "libavcodec/bytestream.h"
31 #include "libavcodec/get_bits.h"
32 #include "libavcodec/mathops.h"
36 #include "avio_internal.h"
41 /* maximum size in which we look for synchronisation if
42 synchronisation is lost */
43 #define MAX_RESYNC_SIZE 65536
45 #define MAX_PES_PAYLOAD 200*1024
47 #define MAX_MP4_DESCR_COUNT 16
49 enum MpegTSFilterType {
54 typedef struct MpegTSFilter MpegTSFilter;
56 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos, int64_t cur_pcr);
58 typedef struct MpegTSPESFilter {
63 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
65 typedef void SetServiceCallback(void *opaque, int ret);
67 typedef struct MpegTSSectionFilter {
71 unsigned int check_crc:1;
72 unsigned int end_of_section_reached:1;
73 SectionCallback *section_cb;
75 } MpegTSSectionFilter;
80 int last_cc; /* last cc code (-1 if first packet) */
81 enum MpegTSFilterType type;
83 MpegTSPESFilter pes_filter;
84 MpegTSSectionFilter section_filter;
88 #define MAX_PIDS_PER_PROGRAM 64
90 unsigned int id; //program id/service id
92 unsigned int pids[MAX_PIDS_PER_PROGRAM];
95 struct MpegTSContext {
98 AVFormatContext *stream;
99 /** raw packet size, including FEC if present */
104 /** if true, all pids are analyzed to find streams */
107 /** compute exact PCR for each transport stream packet */
108 int mpeg2ts_compute_pcr;
110 /** fix dvb teletext pts */
111 int fix_teletext_pts;
113 int64_t cur_pcr; /**< used to estimate the exact PCR */
114 int pcr_incr; /**< used to estimate the exact PCR */
116 /* data needed to handle file based ts */
117 /** stop parsing loop */
119 /** packet containing Audio/Video data */
121 /** to detect seek */
124 /******************************************/
125 /* private mpegts data */
127 /** structure to keep track of Program->pids mapping */
131 int8_t crc_validity[NB_PID_MAX];
133 /** filters for various streams specified by PMT + for the PAT and PMT */
134 MpegTSFilter *pids[NB_PID_MAX];
138 static const AVOption mpegtsraw_options[] = {
139 {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
140 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
144 static const AVClass mpegtsraw_class = {
145 .class_name = "mpegtsraw demuxer",
146 .item_name = av_default_item_name,
147 .option = mpegtsraw_options,
148 .version = LIBAVUTIL_VERSION_INT,
151 static const AVOption mpegts_options[] = {
152 {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
153 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
157 static const AVClass mpegts_class = {
158 .class_name = "mpegts demuxer",
159 .item_name = av_default_item_name,
160 .option = mpegts_options,
161 .version = LIBAVUTIL_VERSION_INT,
164 /* TS stream handling */
169 MPEGTS_PESHEADER_FILL,
174 /* enough for PES header + length */
175 #define PES_START_SIZE 6
176 #define PES_HEADER_SIZE 9
177 #define MAX_PES_HEADER_SIZE (9 + 255)
179 typedef struct PESContext {
181 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
184 AVFormatContext *stream;
186 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
187 enum MpegTSState state;
188 /* used to get the format */
190 int flags; /**< copied to the AVPacket flags */
193 int extended_stream_id;
195 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
196 uint8_t header[MAX_PES_HEADER_SIZE];
202 extern AVInputFormat ff_mpegts_demuxer;
204 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
206 AVProgram *prg = NULL;
208 for(i=0; i<ts->stream->nb_programs; i++)
209 if(ts->stream->programs[i]->id == programid){
210 prg = ts->stream->programs[i];
215 prg->nb_stream_indexes = 0;
218 static void clear_program(MpegTSContext *ts, unsigned int programid)
222 clear_avprogram(ts, programid);
223 for(i=0; i<ts->nb_prg; i++)
224 if(ts->prg[i].id == programid)
225 ts->prg[i].nb_pids = 0;
228 static void clear_programs(MpegTSContext *ts)
234 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
237 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
241 p = &ts->prg[ts->nb_prg];
247 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
250 struct Program *p = NULL;
251 for(i=0; i<ts->nb_prg; i++) {
252 if(ts->prg[i].id == programid) {
260 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
262 p->pids[p->nb_pids++] = pid;
265 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
268 for(i=0; i<s->nb_programs; i++) {
269 if(s->programs[i]->id == programid) {
270 s->programs[i]->pcr_pid = pid;
277 * @brief discard_pid() decides if the pid is to be discarded according
278 * to caller's programs selection
279 * @param ts : - TS context
281 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
284 static int discard_pid(MpegTSContext *ts, unsigned int pid)
287 int used = 0, discarded = 0;
290 /* If none of the programs have .discard=AVDISCARD_ALL then there's
291 * no way we have to discard this packet
293 for (k = 0; k < ts->stream->nb_programs; k++) {
294 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
297 if (k == ts->stream->nb_programs)
300 for(i=0; i<ts->nb_prg; i++) {
302 for(j=0; j<p->nb_pids; j++) {
303 if(p->pids[j] != pid)
305 //is program with id p->id set to be discarded?
306 for(k=0; k<ts->stream->nb_programs; k++) {
307 if(ts->stream->programs[k]->id == p->id) {
308 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
317 return !used && discarded;
321 * Assemble PES packets out of TS packets, and then call the "section_cb"
322 * function when they are complete.
324 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
325 const uint8_t *buf, int buf_size, int is_start)
327 MpegTSContext *ts = s->priv_data;
328 MpegTSSectionFilter *tss = &tss1->u.section_filter;
332 memcpy(tss->section_buf, buf, buf_size);
333 tss->section_index = buf_size;
334 tss->section_h_size = -1;
335 tss->end_of_section_reached = 0;
337 if (tss->end_of_section_reached)
339 len = 4096 - tss->section_index;
342 memcpy(tss->section_buf + tss->section_index, buf, len);
343 tss->section_index += len;
346 /* compute section length if possible */
347 if (tss->section_h_size == -1 && tss->section_index >= 3) {
348 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
351 tss->section_h_size = len;
354 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
356 tss->end_of_section_reached = 1;
359 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
361 ts->crc_validity[ tss1->pid ] = 100;
362 }else if(ts->crc_validity[ tss1->pid ] > -10){
363 ts->crc_validity[ tss1->pid ]--;
368 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
372 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
373 SectionCallback *section_cb, void *opaque,
377 MpegTSFilter *filter;
378 MpegTSSectionFilter *sec;
380 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
382 if (pid >= NB_PID_MAX || ts->pids[pid])
384 filter = av_mallocz(sizeof(MpegTSFilter));
387 ts->pids[pid] = filter;
388 filter->type = MPEGTS_SECTION;
391 filter->last_cc = -1;
392 sec = &filter->u.section_filter;
393 sec->section_cb = section_cb;
394 sec->opaque = opaque;
395 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
396 sec->check_crc = check_crc;
397 if (!sec->section_buf) {
404 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
408 MpegTSFilter *filter;
409 MpegTSPESFilter *pes;
411 if (pid >= NB_PID_MAX || ts->pids[pid])
413 filter = av_mallocz(sizeof(MpegTSFilter));
416 ts->pids[pid] = filter;
417 filter->type = MPEGTS_PES;
420 filter->last_cc = -1;
421 pes = &filter->u.pes_filter;
422 pes->pes_cb = pes_cb;
423 pes->opaque = opaque;
427 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
432 if (filter->type == MPEGTS_SECTION)
433 av_freep(&filter->u.section_filter.section_buf);
434 else if (filter->type == MPEGTS_PES) {
435 PESContext *pes = filter->u.pes_filter.opaque;
436 av_buffer_unref(&pes->buffer);
437 /* referenced private data will be freed later in
438 * avformat_close_input */
439 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
440 av_freep(&filter->u.pes_filter.opaque);
445 ts->pids[pid] = NULL;
448 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
449 int stat[TS_MAX_PACKET_SIZE];
454 memset(stat, 0, packet_size*sizeof(int));
456 for(x=i=0; i<size-3; i++){
457 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
459 if(stat[x] > best_score){
466 if(x == packet_size) x= 0;
472 /* autodetect fec presence. Must have at least 1024 bytes */
473 static int get_packet_size(const uint8_t *buf, int size)
475 int score, fec_score, dvhs_score;
477 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
480 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
481 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
482 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
483 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
484 score, dvhs_score, fec_score);
486 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
487 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
488 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
492 typedef struct SectionHeader {
497 uint8_t last_sec_num;
500 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
513 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
519 if ((p + 1) >= p_end)
527 /* read and allocate a DVB string preceded by its length */
528 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
535 len = get8(&p, p_end);
538 if ((p + len) > p_end)
540 str = av_malloc(len + 1);
550 static int parse_section_header(SectionHeader *h,
551 const uint8_t **pp, const uint8_t *p_end)
555 val = get8(pp, p_end);
560 val = get16(pp, p_end);
564 val = get8(pp, p_end);
567 h->version = (val >> 1) & 0x1f;
568 val = get8(pp, p_end);
572 val = get8(pp, p_end);
575 h->last_sec_num = val;
580 uint32_t stream_type;
581 enum AVMediaType codec_type;
582 enum AVCodecID codec_id;
585 static const StreamType ISO_types[] = {
586 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
587 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
588 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
589 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
590 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
591 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
592 /* Makito encoder sets stream type 0x11 for AAC,
593 * so auto-detect LOAS/LATM instead of hardcoding it. */
594 #if !CONFIG_LOAS_DEMUXER
595 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
597 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
598 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
599 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
600 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
604 static const StreamType HDMV_types[] = {
605 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
606 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
607 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
608 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
609 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
610 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
611 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
612 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
613 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
614 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
619 static const StreamType MISC_types[] = {
620 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
621 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
625 static const StreamType REGD_types[] = {
626 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
627 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
628 { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
629 { MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
630 { MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
631 { MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
632 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
633 { MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
637 /* descriptor present */
638 static const StreamType DESC_types[] = {
639 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
640 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
641 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
642 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
643 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
647 static void mpegts_find_stream_type(AVStream *st,
648 uint32_t stream_type, const StreamType *types)
650 if (avcodec_is_open(st->codec)) {
651 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
655 for (; types->stream_type; types++) {
656 if (stream_type == types->stream_type) {
657 st->codec->codec_type = types->codec_type;
658 st->codec->codec_id = types->codec_id;
659 st->request_probe = 0;
665 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
666 uint32_t stream_type, uint32_t prog_reg_desc)
668 int old_codec_type= st->codec->codec_type;
669 int old_codec_id = st->codec->codec_id;
671 if (avcodec_is_open(st->codec)) {
672 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
676 avpriv_set_pts_info(st, 33, 1, 90000);
678 st->codec->codec_type = AVMEDIA_TYPE_DATA;
679 st->codec->codec_id = AV_CODEC_ID_NONE;
680 st->need_parsing = AVSTREAM_PARSE_FULL;
682 pes->stream_type = stream_type;
684 av_log(pes->stream, AV_LOG_DEBUG,
685 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
686 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
688 st->codec->codec_tag = pes->stream_type;
690 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
691 if ((prog_reg_desc == AV_RL32("HDMV") ||
692 prog_reg_desc == AV_RL32("HDPR")) &&
693 st->codec->codec_id == AV_CODEC_ID_NONE) {
694 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
695 if (pes->stream_type == 0x83) {
696 // HDMV TrueHD streams also contain an AC3 coded version of the
697 // audio track - add a second stream for this
699 // priv_data cannot be shared between streams
700 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
702 return AVERROR(ENOMEM);
703 memcpy(sub_pes, pes, sizeof(*sub_pes));
705 sub_st = avformat_new_stream(pes->stream, NULL);
708 return AVERROR(ENOMEM);
711 sub_st->id = pes->pid;
712 avpriv_set_pts_info(sub_st, 33, 1, 90000);
713 sub_st->priv_data = sub_pes;
714 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
715 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
716 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
717 sub_pes->sub_st = pes->sub_st = sub_st;
720 if (st->codec->codec_id == AV_CODEC_ID_NONE)
721 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
722 if (st->codec->codec_id == AV_CODEC_ID_NONE){
723 st->codec->codec_id = old_codec_id;
724 st->codec->codec_type= old_codec_type;
730 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
734 pkt->buf = pes->buffer;
735 pkt->data = pes->buffer->data;
736 pkt->size = pes->data_index;
738 if(pes->total_size != MAX_PES_PAYLOAD &&
739 pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) {
740 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
741 pes->flags |= AV_PKT_FLAG_CORRUPT;
743 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
745 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
746 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
747 pkt->stream_index = pes->sub_st->index;
749 pkt->stream_index = pes->st->index;
752 /* store position of first TS packet of this PES packet */
753 pkt->pos = pes->ts_packet_pos;
754 pkt->flags = pes->flags;
756 /* reset pts values */
757 pes->pts = AV_NOPTS_VALUE;
758 pes->dts = AV_NOPTS_VALUE;
764 static uint64_t get_ts64(GetBitContext *gb, int bits)
766 if (get_bits_left(gb) < bits)
767 return AV_NOPTS_VALUE;
768 return get_bits64(gb, bits);
771 static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
774 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
775 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
776 int dts_flag = -1, cts_flag = -1;
777 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
779 init_get_bits(&gb, buf, buf_size*8);
781 if (sl->use_au_start)
782 au_start_flag = get_bits1(&gb);
784 au_end_flag = get_bits1(&gb);
785 if (!sl->use_au_start && !sl->use_au_end)
786 au_start_flag = au_end_flag = 1;
788 ocr_flag = get_bits1(&gb);
790 idle_flag = get_bits1(&gb);
792 padding_flag = get_bits1(&gb);
794 padding_bits = get_bits(&gb, 3);
796 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
797 if (sl->packet_seq_num_len)
798 skip_bits_long(&gb, sl->packet_seq_num_len);
799 if (sl->degr_prior_len)
801 skip_bits(&gb, sl->degr_prior_len);
803 skip_bits_long(&gb, sl->ocr_len);
805 if (sl->use_rand_acc_pt)
807 if (sl->au_seq_num_len > 0)
808 skip_bits_long(&gb, sl->au_seq_num_len);
809 if (sl->use_timestamps) {
810 dts_flag = get_bits1(&gb);
811 cts_flag = get_bits1(&gb);
814 if (sl->inst_bitrate_len)
815 inst_bitrate_flag = get_bits1(&gb);
817 dts = get_ts64(&gb, sl->timestamp_len);
819 cts = get_ts64(&gb, sl->timestamp_len);
821 skip_bits_long(&gb, sl->au_len);
822 if (inst_bitrate_flag)
823 skip_bits_long(&gb, sl->inst_bitrate_len);
826 if (dts != AV_NOPTS_VALUE)
828 if (cts != AV_NOPTS_VALUE)
831 if (sl->timestamp_len && sl->timestamp_res)
832 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
834 return (get_bits_count(&gb) + 7) >> 3;
837 /* return non zero if a packet could be constructed */
838 static int mpegts_push_data(MpegTSFilter *filter,
839 const uint8_t *buf, int buf_size, int is_start,
840 int64_t pos, int64_t pcr)
842 PESContext *pes = filter->u.pes_filter.opaque;
843 MpegTSContext *ts = pes->ts;
854 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
855 new_pes_packet(pes, ts->pkt);
858 pes->state = MPEGTS_HEADER;
860 pes->ts_packet_pos = pos;
863 while (buf_size > 0) {
866 len = PES_START_SIZE - pes->data_index;
869 memcpy(pes->header + pes->data_index, p, len);
870 pes->data_index += len;
873 if (pes->data_index == PES_START_SIZE) {
874 /* we got all the PES or section header. We can now
876 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
877 pes->header[2] == 0x01) {
878 /* it must be an mpeg2 PES stream */
879 code = pes->header[3] | 0x100;
880 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
882 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
883 (!pes->sub_st || pes->sub_st->discard == AVDISCARD_ALL)) ||
884 code == 0x1be) /* padding_stream */
887 /* stream not present in PMT */
889 pes->st = avformat_new_stream(ts->stream, NULL);
891 return AVERROR(ENOMEM);
892 pes->st->id = pes->pid;
893 mpegts_set_stream_info(pes->st, pes, 0, 0);
896 pes->total_size = AV_RB16(pes->header + 4);
897 /* NOTE: a zero total size means the PES size is
899 if (!pes->total_size)
900 pes->total_size = MAX_PES_PAYLOAD;
902 /* allocate pes buffer */
903 pes->buffer = av_buffer_alloc(pes->total_size +
904 FF_INPUT_BUFFER_PADDING_SIZE);
906 return AVERROR(ENOMEM);
908 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
909 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
910 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
911 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
912 pes->state = MPEGTS_PESHEADER;
913 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
914 av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
915 pes->pid, pes->stream_type);
916 pes->st->request_probe= 1;
919 pes->state = MPEGTS_PAYLOAD;
923 /* otherwise, it should be a table */
926 pes->state = MPEGTS_SKIP;
931 /**********************************************/
932 /* PES packing parsing */
933 case MPEGTS_PESHEADER:
934 len = PES_HEADER_SIZE - pes->data_index;
939 memcpy(pes->header + pes->data_index, p, len);
940 pes->data_index += len;
943 if (pes->data_index == PES_HEADER_SIZE) {
944 pes->pes_header_size = pes->header[8] + 9;
945 pes->state = MPEGTS_PESHEADER_FILL;
948 case MPEGTS_PESHEADER_FILL:
949 len = pes->pes_header_size - pes->data_index;
954 memcpy(pes->header + pes->data_index, p, len);
955 pes->data_index += len;
958 if (pes->data_index == pes->pes_header_size) {
960 unsigned int flags, pes_ext, skip;
962 flags = pes->header[7];
964 pes->pts = AV_NOPTS_VALUE;
965 pes->dts = AV_NOPTS_VALUE;
966 if ((flags & 0xc0) == 0x80) {
967 pes->dts = pes->pts = ff_parse_pes_pts(r);
969 } else if ((flags & 0xc0) == 0xc0) {
970 pes->pts = ff_parse_pes_pts(r);
972 pes->dts = ff_parse_pes_pts(r);
975 pes->extended_stream_id = -1;
976 if (flags & 0x01) { /* PES extension */
978 /* Skip PES private data, program packet sequence counter and P-STD buffer */
979 skip = (pes_ext >> 4) & 0xb;
982 if ((pes_ext & 0x41) == 0x01 &&
983 (r + 2) <= (pes->header + pes->pes_header_size)) {
984 /* PES extension 2 */
985 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
986 pes->extended_stream_id = r[1];
990 /* we got the full header. We parse it and get the payload */
991 pes->state = MPEGTS_PAYLOAD;
993 if (pes->stream_type == 0x12 && buf_size > 0) {
994 int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size);
995 pes->pes_header_size += sl_header_bytes;
996 p += sl_header_bytes;
997 buf_size -= sl_header_bytes;
999 if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1000 AVProgram *p = NULL;
1001 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1002 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1003 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1004 if (f && f->type == MPEGTS_PES) {
1005 PESContext *pcrpes = f->u.pes_filter.opaque;
1006 if (pcrpes && pcrpes->last_pcr != -1 && pcrpes->st && pcrpes->st->discard != AVDISCARD_ALL) {
1007 // teletext packets do not always have correct timestamps,
1008 // the standard says they should be handled after 40.6 ms at most,
1009 // and the pcr error to this packet should be no more than 100 ms.
1010 // TODO: we should interpolate the PCR, not just use the last one
1011 int64_t pcr = pcrpes->last_pcr / 300;
1012 pes->st->pts_wrap_reference = pcrpes->st->pts_wrap_reference;
1013 pes->st->pts_wrap_behavior = pcrpes->st->pts_wrap_behavior;
1014 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1015 pes->pts = pes->dts = pcr;
1016 } else if (pes->dts > pcr + 3654 + 9000) {
1017 pes->pts = pes->dts = pcr + 3654 + 9000;
1027 case MPEGTS_PAYLOAD:
1028 if (buf_size > 0 && pes->buffer) {
1029 if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
1030 new_pes_packet(pes, ts->pkt);
1031 pes->total_size = MAX_PES_PAYLOAD;
1032 pes->buffer = av_buffer_alloc(pes->total_size + FF_INPUT_BUFFER_PADDING_SIZE);
1034 return AVERROR(ENOMEM);
1036 } else if (pes->data_index == 0 && buf_size > pes->total_size) {
1037 // pes packet size is < ts size packet and pes data is padded with 0xff
1038 // not sure if this is legal in ts but see issue #2392
1039 buf_size = pes->total_size;
1041 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1042 pes->data_index += buf_size;
1045 /* emit complete packets with known packet size
1046 * decreases demuxer delay for infrequent packets like subtitles from
1047 * a couple of seconds to milliseconds for properly muxed files.
1048 * total_size is the number of bytes following pes_packet_length
1049 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1050 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1051 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1053 new_pes_packet(pes, ts->pkt);
1065 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1070 /* if no pid found, then add a pid context */
1071 pes = av_mallocz(sizeof(PESContext));
1075 pes->stream = ts->stream;
1077 pes->pcr_pid = pcr_pid;
1078 pes->state = MPEGTS_SKIP;
1079 pes->pts = AV_NOPTS_VALUE;
1080 pes->dts = AV_NOPTS_VALUE;
1082 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1095 Mp4Descr *active_descr;
1097 int max_descr_count;
1099 } MP4DescrParseContext;
1101 static int init_MP4DescrParseContext(
1102 MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf,
1103 unsigned size, Mp4Descr *descr, int max_descr_count)
1107 return AVERROR_INVALIDDATA;
1109 if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0,
1110 NULL, NULL, NULL, NULL)) < 0)
1117 d->active_descr = NULL;
1118 d->max_descr_count = max_descr_count;
1123 static void update_offsets(AVIOContext *pb, int64_t *off, int *len) {
1124 int64_t new_off = avio_tell(pb);
1125 (*len) -= new_off - *off;
1129 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1132 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1135 if (parse_mp4_descr(d, off, len, 0) < 0)
1137 update_offsets(&d->pb, &off, &len);
1142 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1144 avio_rb16(&d->pb); // ID
1150 update_offsets(&d->pb, &off, &len);
1151 return parse_mp4_descr_arr(d, off, len);
1154 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1159 id_flags = avio_rb16(&d->pb);
1160 if (!(id_flags & 0x0020)) { //URL_Flag
1161 update_offsets(&d->pb, &off, &len);
1162 return parse_mp4_descr_arr(d, off, len); //ES_Descriptor[]
1168 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1171 if (d->descr_count >= d->max_descr_count)
1173 ff_mp4_parse_es_descr(&d->pb, &es_id);
1174 d->active_descr = d->descr + (d->descr_count++);
1176 d->active_descr->es_id = es_id;
1177 update_offsets(&d->pb, &off, &len);
1178 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1179 update_offsets(&d->pb, &off, &len);
1181 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1182 d->active_descr = NULL;
1186 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1188 Mp4Descr *descr = d->active_descr;
1191 d->active_descr->dec_config_descr = av_malloc(len);
1192 if (!descr->dec_config_descr)
1193 return AVERROR(ENOMEM);
1194 descr->dec_config_descr_len = len;
1195 avio_read(&d->pb, descr->dec_config_descr, len);
1199 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1201 Mp4Descr *descr = d->active_descr;
1206 predefined = avio_r8(&d->pb);
1209 int flags = avio_r8(&d->pb);
1210 descr->sl.use_au_start = !!(flags & 0x80);
1211 descr->sl.use_au_end = !!(flags & 0x40);
1212 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1213 descr->sl.use_padding = !!(flags & 0x08);
1214 descr->sl.use_timestamps = !!(flags & 0x04);
1215 descr->sl.use_idle = !!(flags & 0x02);
1216 descr->sl.timestamp_res = avio_rb32(&d->pb);
1218 descr->sl.timestamp_len = avio_r8(&d->pb);
1219 descr->sl.ocr_len = avio_r8(&d->pb);
1220 descr->sl.au_len = avio_r8(&d->pb);
1221 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1222 lengths = avio_rb16(&d->pb);
1223 descr->sl.degr_prior_len = lengths >> 12;
1224 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1225 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1227 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1232 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1235 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1236 update_offsets(&d->pb, &off, &len);
1237 if (len < 0 || len1 > len || len1 <= 0) {
1238 av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len);
1242 if (d->level++ >= MAX_LEVEL) {
1243 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1247 if (target_tag && tag != target_tag) {
1248 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag);
1254 parse_MP4IODescrTag(d, off, len1);
1257 parse_MP4ODescrTag(d, off, len1);
1260 parse_MP4ESDescrTag(d, off, len1);
1262 case MP4DecConfigDescrTag:
1263 parse_MP4DecConfigDescrTag(d, off, len1);
1266 parse_MP4SLDescrTag(d, off, len1);
1272 avio_seek(&d->pb, off + len1, SEEK_SET);
1276 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1277 Mp4Descr *descr, int *descr_count, int max_descr_count)
1279 MP4DescrParseContext d;
1280 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1283 parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1285 *descr_count = d.descr_count;
1289 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1290 Mp4Descr *descr, int *descr_count, int max_descr_count)
1292 MP4DescrParseContext d;
1293 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1296 parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1298 *descr_count = d.descr_count;
1302 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1304 MpegTSContext *ts = filter->u.section_filter.opaque;
1306 const uint8_t *p, *p_end;
1308 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1309 int mp4_descr_count = 0;
1311 AVFormatContext *s = ts->stream;
1313 p_end = section + section_len - 4;
1315 if (parse_section_header(&h, &p, p_end) < 0)
1317 if (h.tid != M4OD_TID)
1320 mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1322 for (pid = 0; pid < NB_PID_MAX; pid++) {
1325 for (i = 0; i < mp4_descr_count; i++) {
1328 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1330 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
1331 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1334 pes = ts->pids[pid]->u.pes_filter.opaque;
1340 pes->sl = mp4_descr[i].sl;
1342 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1343 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1344 ff_mp4_read_dec_config_descr(s, st, &pb);
1345 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1346 st->codec->extradata_size > 0)
1347 st->need_parsing = 0;
1348 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1349 st->codec->extradata_size > 0)
1350 st->need_parsing = 0;
1352 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1353 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) {
1354 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1355 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) {
1356 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1357 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) {
1358 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1362 for (i = 0; i < mp4_descr_count; i++)
1363 av_free(mp4_descr[i].dec_config_descr);
1366 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1367 const uint8_t **pp, const uint8_t *desc_list_end,
1368 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1371 const uint8_t *desc_end;
1372 int desc_len, desc_tag, desc_es_id;
1376 desc_tag = get8(pp, desc_list_end);
1379 desc_len = get8(pp, desc_list_end);
1382 desc_end = *pp + desc_len;
1383 if (desc_end > desc_list_end)
1386 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1388 if (st->codec->codec_id == AV_CODEC_ID_NONE &&
1389 stream_type == STREAM_TYPE_PRIVATE_DATA)
1390 mpegts_find_stream_type(st, desc_tag, DESC_types);
1393 case 0x1E: /* SL descriptor */
1394 desc_es_id = get16(pp, desc_end);
1395 if (ts && ts->pids[pid])
1396 ts->pids[pid]->es_id = desc_es_id;
1397 for (i = 0; i < mp4_descr_count; i++)
1398 if (mp4_descr[i].dec_config_descr_len &&
1399 mp4_descr[i].es_id == desc_es_id) {
1401 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1402 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1403 ff_mp4_read_dec_config_descr(fc, st, &pb);
1404 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1405 st->codec->extradata_size > 0)
1406 st->need_parsing = 0;
1407 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1408 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1411 case 0x1F: /* FMC descriptor */
1412 get16(pp, desc_end);
1413 if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe>0) &&
1414 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1416 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1417 mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1418 ff_mp4_read_dec_config_descr(fc, st, &pb);
1419 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1420 st->codec->extradata_size > 0){
1421 st->request_probe= st->need_parsing = 0;
1422 st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
1426 case 0x56: /* DVB teletext descriptor */
1427 language[0] = get8(pp, desc_end);
1428 language[1] = get8(pp, desc_end);
1429 language[2] = get8(pp, desc_end);
1431 av_dict_set(&st->metadata, "language", language, 0);
1433 case 0x59: /* subtitling descriptor */
1434 language[0] = get8(pp, desc_end);
1435 language[1] = get8(pp, desc_end);
1436 language[2] = get8(pp, desc_end);
1438 /* hearing impaired subtitles detection */
1439 switch(get8(pp, desc_end)) {
1440 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1441 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1442 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1443 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1444 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1445 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1446 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1449 if (st->codec->extradata) {
1450 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
1451 avpriv_request_sample(fc, "DVB sub with multiple IDs");
1453 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
1454 if (st->codec->extradata) {
1455 st->codec->extradata_size = 4;
1456 memcpy(st->codec->extradata, *pp, 4);
1460 av_dict_set(&st->metadata, "language", language, 0);
1462 case 0x0a: /* ISO 639 language descriptor */
1463 for (i = 0; i + 4 <= desc_len; i += 4) {
1464 language[i + 0] = get8(pp, desc_end);
1465 language[i + 1] = get8(pp, desc_end);
1466 language[i + 2] = get8(pp, desc_end);
1467 language[i + 3] = ',';
1468 switch (get8(pp, desc_end)) {
1469 case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
1470 case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
1471 case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
1475 language[i - 1] = 0;
1476 av_dict_set(&st->metadata, "language", language, 0);
1479 case 0x05: /* registration descriptor */
1480 st->codec->codec_tag = bytestream_get_le32(pp);
1481 av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
1482 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1483 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1485 case 0x52: /* stream identifier descriptor */
1486 st->stream_identifier = 1 + get8(pp, desc_end);
1495 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1497 MpegTSContext *ts = filter->u.section_filter.opaque;
1498 SectionHeader h1, *h = &h1;
1501 const uint8_t *p, *p_end, *desc_list_end;
1502 int program_info_length, pcr_pid, pid, stream_type;
1504 uint32_t prog_reg_desc = 0; /* registration descriptor */
1506 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1507 int mp4_descr_count = 0;
1510 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1511 hex_dump_debug(ts->stream, section, section_len);
1513 p_end = section + section_len - 4;
1515 if (parse_section_header(h, &p, p_end) < 0)
1518 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
1519 h->id, h->sec_num, h->last_sec_num);
1521 if (h->tid != PMT_TID)
1524 clear_program(ts, h->id);
1525 pcr_pid = get16(&p, p_end);
1529 add_pid_to_pmt(ts, h->id, pcr_pid);
1530 set_pcr_pid(ts->stream, h->id, pcr_pid);
1532 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1534 program_info_length = get16(&p, p_end);
1535 if (program_info_length < 0)
1537 program_info_length &= 0xfff;
1538 while(program_info_length >= 2) {
1540 tag = get8(&p, p_end);
1541 len = get8(&p, p_end);
1543 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1545 if(len > program_info_length - 2)
1546 //something else is broken, exit the program_descriptors_loop
1548 program_info_length -= len + 2;
1549 if (tag == 0x1d) { // IOD descriptor
1550 get8(&p, p_end); // scope
1551 get8(&p, p_end); // label
1553 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1554 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1555 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1556 prog_reg_desc = bytestream_get_le32(&p);
1561 p += program_info_length;
1565 // stop parsing after pmt, we found header
1566 if (!ts->stream->nb_streams)
1572 stream_type = get8(&p, p_end);
1573 if (stream_type < 0)
1575 pid = get16(&p, p_end);
1579 if (pid == ts->current_pid)
1582 /* now create stream */
1583 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1584 pes = ts->pids[pid]->u.pes_filter.opaque;
1586 pes->st = avformat_new_stream(pes->stream, NULL);
1589 pes->st->id = pes->pid;
1592 } else if (stream_type != 0x13) {
1593 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
1594 pes = add_pes_stream(ts, pid, pcr_pid);
1596 st = avformat_new_stream(pes->stream, NULL);
1602 int idx = ff_find_stream_index(ts->stream, pid);
1604 st = ts->stream->streams[idx];
1606 st = avformat_new_stream(ts->stream, NULL);
1610 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1617 if (pes && !pes->stream_type)
1618 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1620 add_pid_to_pmt(ts, h->id, pid);
1622 ff_program_add_stream_index(ts->stream, h->id, st->index);
1624 desc_list_len = get16(&p, p_end);
1625 if (desc_list_len < 0)
1627 desc_list_len &= 0xfff;
1628 desc_list_end = p + desc_list_len;
1629 if (desc_list_end > p_end)
1632 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
1633 mp4_descr, mp4_descr_count, pid, ts) < 0)
1636 if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
1637 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
1638 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1645 for (i = 0; i < mp4_descr_count; i++)
1646 av_free(mp4_descr[i].dec_config_descr);
1649 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1651 MpegTSContext *ts = filter->u.section_filter.opaque;
1652 SectionHeader h1, *h = &h1;
1653 const uint8_t *p, *p_end;
1657 av_dlog(ts->stream, "PAT:\n");
1658 hex_dump_debug(ts->stream, section, section_len);
1660 p_end = section + section_len - 4;
1662 if (parse_section_header(h, &p, p_end) < 0)
1664 if (h->tid != PAT_TID)
1667 ts->stream->ts_id = h->id;
1671 sid = get16(&p, p_end);
1674 pmt_pid = get16(&p, p_end);
1679 if (pmt_pid == ts->current_pid)
1682 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1684 if (sid == 0x0000) {
1687 MpegTSFilter *fil = ts->pids[pmt_pid];
1688 program = av_new_program(ts->stream, sid);
1689 program->program_num = sid;
1690 program->pmt_pid = pmt_pid;
1692 if ( fil->type != MPEGTS_SECTION
1693 || fil->pid != pmt_pid
1694 || fil->u.section_filter.section_cb != pmt_cb)
1695 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1697 if (!ts->pids[pmt_pid])
1698 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1699 add_pat_entry(ts, sid);
1700 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
1701 add_pid_to_pmt(ts, sid, pmt_pid);
1707 for (j=0; j<ts->stream->nb_programs; j++) {
1708 for (i=0; i<ts->nb_prg; i++)
1709 if (ts->prg[i].id == ts->stream->programs[j]->id)
1712 clear_avprogram(ts, ts->stream->programs[j]->id);
1717 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1719 MpegTSContext *ts = filter->u.section_filter.opaque;
1720 SectionHeader h1, *h = &h1;
1721 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1722 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1723 char *name, *provider_name;
1725 av_dlog(ts->stream, "SDT:\n");
1726 hex_dump_debug(ts->stream, section, section_len);
1728 p_end = section + section_len - 4;
1730 if (parse_section_header(h, &p, p_end) < 0)
1732 if (h->tid != SDT_TID)
1734 onid = get16(&p, p_end);
1737 val = get8(&p, p_end);
1741 sid = get16(&p, p_end);
1744 val = get8(&p, p_end);
1747 desc_list_len = get16(&p, p_end);
1748 if (desc_list_len < 0)
1750 desc_list_len &= 0xfff;
1751 desc_list_end = p + desc_list_len;
1752 if (desc_list_end > p_end)
1755 desc_tag = get8(&p, desc_list_end);
1758 desc_len = get8(&p, desc_list_end);
1759 desc_end = p + desc_len;
1760 if (desc_end > desc_list_end)
1763 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
1764 desc_tag, desc_len);
1768 service_type = get8(&p, p_end);
1769 if (service_type < 0)
1771 provider_name = getstr8(&p, p_end);
1774 name = getstr8(&p, p_end);
1776 AVProgram *program = av_new_program(ts->stream, sid);
1778 av_dict_set(&program->metadata, "service_name", name, 0);
1779 av_dict_set(&program->metadata, "service_provider", provider_name, 0);
1783 av_free(provider_name);
1794 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1795 const uint8_t *packet);
1797 /* handle one TS packet */
1798 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1800 AVFormatContext *s = ts->stream;
1802 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
1803 has_adaptation, has_payload;
1804 const uint8_t *p, *p_end;
1807 pid = AV_RB16(packet + 1) & 0x1fff;
1808 if(pid && discard_pid(ts, pid))
1810 is_start = packet[1] & 0x40;
1811 tss = ts->pids[pid];
1812 if (ts->auto_guess && tss == NULL && is_start) {
1813 add_pes_stream(ts, pid, -1);
1814 tss = ts->pids[pid];
1818 ts->current_pid = pid;
1820 afc = (packet[3] >> 4) & 3;
1821 if (afc == 0) /* reserved value */
1823 has_adaptation = afc & 2;
1824 has_payload = afc & 1;
1825 is_discontinuity = has_adaptation
1826 && packet[4] != 0 /* with length > 0 */
1827 && (packet[5] & 0x80); /* and discontinuity indicated */
1829 /* continuity check (currently not used) */
1830 cc = (packet[3] & 0xf);
1831 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
1832 cc_ok = pid == 0x1FFF // null packet PID
1835 || expected_cc == cc;
1839 av_log(ts->stream, AV_LOG_DEBUG,
1840 "Continuity check failed for pid %d expected %d got %d\n",
1841 pid, expected_cc, cc);
1842 if(tss->type == MPEGTS_PES) {
1843 PESContext *pc = tss->u.pes_filter.opaque;
1844 pc->flags |= AV_PKT_FLAG_CORRUPT;
1851 if (has_adaptation) {
1852 /* skip adaptation field */
1855 /* if past the end of packet, ignore */
1856 p_end = packet + TS_PACKET_SIZE;
1860 pos = avio_tell(ts->stream->pb);
1861 ts->pos47_full = pos;
1863 if (tss->type == MPEGTS_SECTION) {
1865 /* pointer field present */
1867 if (p + len > p_end)
1870 /* write remaining section bytes */
1871 write_section_data(s, tss,
1873 /* check whether filter has been closed */
1879 write_section_data(s, tss,
1884 write_section_data(s, tss,
1893 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
1894 pcr = pcr_h * 300 + pcr_l;
1895 // Note: The position here points actually behind the current packet.
1896 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1897 pos - ts->raw_packet_size, pcr)) < 0)
1904 /* XXX: try to find a better synchro over several packets (use
1905 get_packet_size() ?) */
1906 static int mpegts_resync(AVFormatContext *s)
1908 AVIOContext *pb = s->pb;
1911 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1916 avio_seek(pb, -1, SEEK_CUR);
1920 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1925 /* return -1 if error or EOF. Return 0 if OK. */
1926 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
1928 AVIOContext *pb = s->pb;
1932 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
1933 if (len != TS_PACKET_SIZE)
1934 return len < 0 ? len : AVERROR_EOF;
1935 /* check packet sync byte */
1936 if ((*data)[0] != 0x47) {
1937 /* find a new packet start */
1938 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1939 if (mpegts_resync(s) < 0)
1940 return AVERROR(EAGAIN);
1950 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
1952 AVIOContext *pb = s->pb;
1953 int skip = raw_packet_size - TS_PACKET_SIZE;
1955 avio_skip(pb, skip);
1958 static int handle_packets(MpegTSContext *ts, int nb_packets)
1960 AVFormatContext *s = ts->stream;
1961 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
1962 const uint8_t *data;
1963 int packet_num, ret = 0;
1965 if (avio_tell(s->pb) != ts->last_pos) {
1967 av_dlog(ts->stream, "Skipping after seek\n");
1968 /* seek detected, flush pes buffer */
1969 for (i = 0; i < NB_PID_MAX; i++) {
1971 if (ts->pids[i]->type == MPEGTS_PES) {
1972 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1973 av_buffer_unref(&pes->buffer);
1974 pes->data_index = 0;
1975 pes->state = MPEGTS_SKIP; /* skip until pes header */
1978 ts->pids[i]->last_cc = -1;
1985 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1988 if (nb_packets != 0 && packet_num >= nb_packets ||
1989 ts->stop_parse > 1) {
1990 ret = AVERROR(EAGAIN);
1993 if (ts->stop_parse > 0)
1996 ret = read_packet(s, packet, ts->raw_packet_size, &data);
1999 ret = handle_packet(ts, data);
2000 finished_reading_packet(s, ts->raw_packet_size);
2004 ts->last_pos = avio_tell(s->pb);
2008 static int mpegts_probe(AVProbeData *p)
2010 const int size= p->buf_size;
2014 int check_count= size / TS_FEC_PACKET_SIZE;
2015 #define CHECK_COUNT 10
2016 #define CHECK_BLOCK 100
2018 if (check_count < CHECK_COUNT)
2021 for (i=0; i<check_count; i+=CHECK_BLOCK){
2022 int left = FFMIN(check_count - i, CHECK_BLOCK);
2023 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL);
2024 int dvhs_score= analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
2025 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
2026 score = FFMAX3(score, dvhs_score, fec_score);
2028 maxscore = FFMAX(maxscore, score);
2031 sumscore = sumscore*CHECK_COUNT/check_count;
2032 maxscore = maxscore*CHECK_COUNT/CHECK_BLOCK;
2034 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2036 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2037 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2041 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2042 (-1) if not available */
2043 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2044 const uint8_t *packet)
2046 int afc, len, flags;
2050 afc = (packet[3] >> 4) & 3;
2060 if (!(flags & 0x10))
2065 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
2066 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2070 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2072 /* NOTE: We attempt to seek on non-seekable files as well, as the
2073 * probe buffer usually is big enough. Only warn if the seek failed
2074 * on files where the seek should work. */
2075 if (avio_seek(pb, pos, SEEK_SET) < 0)
2076 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2079 static int mpegts_read_header(AVFormatContext *s)
2081 MpegTSContext *ts = s->priv_data;
2082 AVIOContext *pb = s->pb;
2083 uint8_t buf[8*1024]={0};
2087 ffio_ensure_seekback(pb, s->probesize);
2089 /* read the first 8192 bytes to get packet size */
2090 pos = avio_tell(pb);
2091 len = avio_read(pb, buf, sizeof(buf));
2092 ts->raw_packet_size = get_packet_size(buf, len);
2093 if (ts->raw_packet_size <= 0) {
2094 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2095 ts->raw_packet_size = TS_PACKET_SIZE;
2100 if (s->iformat == &ff_mpegts_demuxer) {
2103 /* first do a scan to get all the services */
2104 seek_back(s, pb, pos);
2106 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2108 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2110 handle_packets(ts, s->probesize / ts->raw_packet_size);
2111 /* if could not find service, enable auto_guess */
2115 av_dlog(ts->stream, "tuning done\n");
2117 s->ctx_flags |= AVFMTCTX_NOHEADER;
2120 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2121 int64_t pcrs[2], pcr_h;
2122 int packet_count[2];
2123 uint8_t packet[TS_PACKET_SIZE];
2124 const uint8_t *data;
2126 /* only read packets */
2128 st = avformat_new_stream(s, NULL);
2131 avpriv_set_pts_info(st, 60, 1, 27000000);
2132 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2133 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2135 /* we iterate until we find two PCRs to estimate the bitrate */
2140 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2143 pid = AV_RB16(data + 1) & 0x1fff;
2144 if ((pcr_pid == -1 || pcr_pid == pid) &&
2145 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2146 finished_reading_packet(s, ts->raw_packet_size);
2148 packet_count[nb_pcrs] = nb_packets;
2149 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2154 finished_reading_packet(s, ts->raw_packet_size);
2159 /* NOTE1: the bitrate is computed without the FEC */
2160 /* NOTE2: it is only the bitrate of the start of the stream */
2161 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2162 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2163 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
2164 st->codec->bit_rate = s->bit_rate;
2165 st->start_time = ts->cur_pcr;
2166 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2167 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2170 seek_back(s, pb, pos);
2176 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2178 static int mpegts_raw_read_packet(AVFormatContext *s,
2181 MpegTSContext *ts = s->priv_data;
2183 int64_t pcr_h, next_pcr_h, pos;
2184 int pcr_l, next_pcr_l;
2185 uint8_t pcr_buf[12];
2186 const uint8_t *data;
2188 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2189 return AVERROR(ENOMEM);
2190 pkt->pos= avio_tell(s->pb);
2191 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2193 av_free_packet(pkt);
2196 if (data != pkt->data)
2197 memcpy(pkt->data, data, ts->raw_packet_size);
2198 finished_reading_packet(s, ts->raw_packet_size);
2199 if (ts->mpeg2ts_compute_pcr) {
2200 /* compute exact PCR for each packet */
2201 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2202 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2203 pos = avio_tell(s->pb);
2204 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
2205 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2206 avio_read(s->pb, pcr_buf, 12);
2207 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2208 /* XXX: not precise enough */
2209 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2214 avio_seek(s->pb, pos, SEEK_SET);
2215 /* no next PCR found: we use previous increment */
2216 ts->cur_pcr = pcr_h * 300 + pcr_l;
2218 pkt->pts = ts->cur_pcr;
2219 pkt->duration = ts->pcr_incr;
2220 ts->cur_pcr += ts->pcr_incr;
2222 pkt->stream_index = 0;
2226 static int mpegts_read_packet(AVFormatContext *s,
2229 MpegTSContext *ts = s->priv_data;
2234 ret = handle_packets(ts, 0);
2236 av_free_packet(ts->pkt);
2237 /* flush pes data left */
2238 for (i = 0; i < NB_PID_MAX; i++) {
2239 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2240 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2241 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2242 new_pes_packet(pes, pkt);
2243 pes->state = MPEGTS_SKIP;
2251 if (!ret && pkt->size < 0)
2252 ret = AVERROR(EINTR);
2256 static void mpegts_free(MpegTSContext *ts)
2262 for(i=0;i<NB_PID_MAX;i++)
2263 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
2266 static int mpegts_read_close(AVFormatContext *s)
2268 MpegTSContext *ts = s->priv_data;
2273 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2274 int64_t *ppos, int64_t pos_limit)
2276 MpegTSContext *ts = s->priv_data;
2277 int64_t pos, timestamp;
2278 uint8_t buf[TS_PACKET_SIZE];
2279 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
2280 int pos47 = ts->pos47_full % ts->raw_packet_size;
2281 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2282 while(pos < pos_limit) {
2283 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2284 return AV_NOPTS_VALUE;
2285 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2286 return AV_NOPTS_VALUE;
2287 if (buf[0] != 0x47) {
2288 if (mpegts_resync(s) < 0)
2289 return AV_NOPTS_VALUE;
2290 pos = avio_tell(s->pb);
2293 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2294 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2298 pos += ts->raw_packet_size;
2301 return AV_NOPTS_VALUE;
2304 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2305 int64_t *ppos, int64_t pos_limit)
2307 MpegTSContext *ts = s->priv_data;
2309 int pos47 = ts->pos47_full % ts->raw_packet_size;
2310 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2311 ff_read_frame_flush(s);
2312 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2313 return AV_NOPTS_VALUE;
2314 while(pos < pos_limit) {
2317 av_init_packet(&pkt);
2318 ret= av_read_frame(s, &pkt);
2320 return AV_NOPTS_VALUE;
2321 av_free_packet(&pkt);
2322 if(pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0){
2323 ff_reduce_index(s, pkt.stream_index);
2324 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2325 if(pkt.stream_index == stream_index){
2333 return AV_NOPTS_VALUE;
2336 /**************************************************************/
2337 /* parsing functions - called from other demuxers such as RTP */
2339 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
2343 ts = av_mallocz(sizeof(MpegTSContext));
2346 /* no stream case, currently used by RTP */
2347 ts->raw_packet_size = TS_PACKET_SIZE;
2350 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2351 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2356 /* return the consumed length if a packet was output, or -1 if no
2358 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2359 const uint8_t *buf, int len)
2367 if (len < TS_PACKET_SIZE)
2369 if (buf[0] != 0x47) {
2373 handle_packet(ts, buf);
2374 buf += TS_PACKET_SIZE;
2375 len -= TS_PACKET_SIZE;
2376 if (ts->stop_parse == 1)
2383 void ff_mpegts_parse_close(MpegTSContext *ts)
2389 AVInputFormat ff_mpegts_demuxer = {
2391 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2392 .priv_data_size = sizeof(MpegTSContext),
2393 .read_probe = mpegts_probe,
2394 .read_header = mpegts_read_header,
2395 .read_packet = mpegts_read_packet,
2396 .read_close = mpegts_read_close,
2397 .read_timestamp = mpegts_get_dts,
2398 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2399 .priv_class = &mpegts_class,
2402 AVInputFormat ff_mpegtsraw_demuxer = {
2403 .name = "mpegtsraw",
2404 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2405 .priv_data_size = sizeof(MpegTSContext),
2406 .read_header = mpegts_read_header,
2407 .read_packet = mpegts_raw_read_packet,
2408 .read_close = mpegts_read_close,
2409 .read_timestamp = mpegts_get_dts,
2410 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2411 .priv_class = &mpegtsraw_class,