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 */
103 /** position corresponding to pos47, or 0 if pos47 invalid */
106 /** if true, all pids are analyzed to find streams */
109 /** compute exact PCR for each transport stream packet */
110 int mpeg2ts_compute_pcr;
112 /** fix dvb teletext pts */
113 int fix_teletext_pts;
115 int64_t cur_pcr; /**< used to estimate the exact PCR */
116 int pcr_incr; /**< used to estimate the exact PCR */
118 /* data needed to handle file based ts */
119 /** stop parsing loop */
121 /** packet containing Audio/Video data */
123 /** to detect seek */
126 /******************************************/
127 /* private mpegts data */
129 /** structure to keep track of Program->pids mapping */
133 int8_t crc_validity[NB_PID_MAX];
135 /** filters for various streams specified by PMT + for the PAT and PMT */
136 MpegTSFilter *pids[NB_PID_MAX];
140 static const AVOption mpegtsraw_options[] = {
141 {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
142 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
146 static const AVClass mpegtsraw_class = {
147 .class_name = "mpegtsraw demuxer",
148 .item_name = av_default_item_name,
149 .option = mpegtsraw_options,
150 .version = LIBAVUTIL_VERSION_INT,
153 static const AVOption mpegts_options[] = {
154 {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
155 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
159 static const AVClass mpegts_class = {
160 .class_name = "mpegts demuxer",
161 .item_name = av_default_item_name,
162 .option = mpegts_options,
163 .version = LIBAVUTIL_VERSION_INT,
166 /* TS stream handling */
171 MPEGTS_PESHEADER_FILL,
176 /* enough for PES header + length */
177 #define PES_START_SIZE 6
178 #define PES_HEADER_SIZE 9
179 #define MAX_PES_HEADER_SIZE (9 + 255)
181 typedef struct PESContext {
183 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
186 AVFormatContext *stream;
188 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
189 enum MpegTSState state;
190 /* used to get the format */
192 int flags; /**< copied to the AVPacket flags */
195 int extended_stream_id;
197 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
198 uint8_t header[MAX_PES_HEADER_SIZE];
204 extern AVInputFormat ff_mpegts_demuxer;
206 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
208 AVProgram *prg = NULL;
210 for(i=0; i<ts->stream->nb_programs; i++)
211 if(ts->stream->programs[i]->id == programid){
212 prg = ts->stream->programs[i];
217 prg->nb_stream_indexes = 0;
220 static void clear_program(MpegTSContext *ts, unsigned int programid)
224 clear_avprogram(ts, programid);
225 for(i=0; i<ts->nb_prg; i++)
226 if(ts->prg[i].id == programid)
227 ts->prg[i].nb_pids = 0;
230 static void clear_programs(MpegTSContext *ts)
236 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
239 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
243 p = &ts->prg[ts->nb_prg];
249 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
252 struct Program *p = NULL;
253 for(i=0; i<ts->nb_prg; i++) {
254 if(ts->prg[i].id == programid) {
262 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
264 p->pids[p->nb_pids++] = pid;
267 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
270 for(i=0; i<s->nb_programs; i++) {
271 if(s->programs[i]->id == programid) {
272 s->programs[i]->pcr_pid = pid;
279 * @brief discard_pid() decides if the pid is to be discarded according
280 * to caller's programs selection
281 * @param ts : - TS context
283 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
286 static int discard_pid(MpegTSContext *ts, unsigned int pid)
289 int used = 0, discarded = 0;
292 /* If none of the programs have .discard=AVDISCARD_ALL then there's
293 * no way we have to discard this packet
295 for (k = 0; k < ts->stream->nb_programs; k++) {
296 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
299 if (k == ts->stream->nb_programs)
302 for(i=0; i<ts->nb_prg; i++) {
304 for(j=0; j<p->nb_pids; j++) {
305 if(p->pids[j] != pid)
307 //is program with id p->id set to be discarded?
308 for(k=0; k<ts->stream->nb_programs; k++) {
309 if(ts->stream->programs[k]->id == p->id) {
310 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
319 return !used && discarded;
323 * Assemble PES packets out of TS packets, and then call the "section_cb"
324 * function when they are complete.
326 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
327 const uint8_t *buf, int buf_size, int is_start)
329 MpegTSContext *ts = s->priv_data;
330 MpegTSSectionFilter *tss = &tss1->u.section_filter;
334 memcpy(tss->section_buf, buf, buf_size);
335 tss->section_index = buf_size;
336 tss->section_h_size = -1;
337 tss->end_of_section_reached = 0;
339 if (tss->end_of_section_reached)
341 len = 4096 - tss->section_index;
344 memcpy(tss->section_buf + tss->section_index, buf, len);
345 tss->section_index += len;
348 /* compute section length if possible */
349 if (tss->section_h_size == -1 && tss->section_index >= 3) {
350 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
353 tss->section_h_size = len;
356 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
358 tss->end_of_section_reached = 1;
361 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
363 ts->crc_validity[ tss1->pid ] = 100;
364 }else if(ts->crc_validity[ tss1->pid ] > -10){
365 ts->crc_validity[ tss1->pid ]--;
370 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
374 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
375 SectionCallback *section_cb, void *opaque,
379 MpegTSFilter *filter;
380 MpegTSSectionFilter *sec;
382 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
384 if (pid >= NB_PID_MAX || ts->pids[pid])
386 filter = av_mallocz(sizeof(MpegTSFilter));
389 ts->pids[pid] = filter;
390 filter->type = MPEGTS_SECTION;
393 filter->last_cc = -1;
394 sec = &filter->u.section_filter;
395 sec->section_cb = section_cb;
396 sec->opaque = opaque;
397 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
398 sec->check_crc = check_crc;
399 if (!sec->section_buf) {
406 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
410 MpegTSFilter *filter;
411 MpegTSPESFilter *pes;
413 if (pid >= NB_PID_MAX || ts->pids[pid])
415 filter = av_mallocz(sizeof(MpegTSFilter));
418 ts->pids[pid] = filter;
419 filter->type = MPEGTS_PES;
422 filter->last_cc = -1;
423 pes = &filter->u.pes_filter;
424 pes->pes_cb = pes_cb;
425 pes->opaque = opaque;
429 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
434 if (filter->type == MPEGTS_SECTION)
435 av_freep(&filter->u.section_filter.section_buf);
436 else if (filter->type == MPEGTS_PES) {
437 PESContext *pes = filter->u.pes_filter.opaque;
438 av_buffer_unref(&pes->buffer);
439 /* referenced private data will be freed later in
440 * avformat_close_input */
441 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
442 av_freep(&filter->u.pes_filter.opaque);
447 ts->pids[pid] = NULL;
450 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
451 int stat[TS_MAX_PACKET_SIZE];
456 memset(stat, 0, packet_size*sizeof(int));
458 for(x=i=0; i<size-3; i++){
459 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
461 if(stat[x] > best_score){
468 if(x == packet_size) x= 0;
474 /* autodetect fec presence. Must have at least 1024 bytes */
475 static int get_packet_size(const uint8_t *buf, int size)
477 int score, fec_score, dvhs_score;
479 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
482 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
483 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
484 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
485 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
486 score, dvhs_score, fec_score);
488 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
489 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
490 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
494 typedef struct SectionHeader {
499 uint8_t last_sec_num;
502 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
515 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
521 if ((p + 1) >= p_end)
529 /* read and allocate a DVB string preceded by its length */
530 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
537 len = get8(&p, p_end);
540 if ((p + len) > p_end)
542 str = av_malloc(len + 1);
552 static int parse_section_header(SectionHeader *h,
553 const uint8_t **pp, const uint8_t *p_end)
557 val = get8(pp, p_end);
562 val = get16(pp, p_end);
566 val = get8(pp, p_end);
569 h->version = (val >> 1) & 0x1f;
570 val = get8(pp, p_end);
574 val = get8(pp, p_end);
577 h->last_sec_num = val;
582 uint32_t stream_type;
583 enum AVMediaType codec_type;
584 enum AVCodecID codec_id;
587 static const StreamType ISO_types[] = {
588 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
589 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
590 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
591 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
592 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
593 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
594 /* Makito encoder sets stream type 0x11 for AAC,
595 * so auto-detect LOAS/LATM instead of hardcoding it. */
596 #if !CONFIG_LOAS_DEMUXER
597 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
599 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
600 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
601 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
602 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
606 static const StreamType HDMV_types[] = {
607 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
608 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
609 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
610 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
611 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
612 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
613 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
614 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
615 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
616 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
621 static const StreamType MISC_types[] = {
622 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
623 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
627 static const StreamType REGD_types[] = {
628 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
629 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
630 { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
631 { MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
632 { MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
633 { MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
634 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
635 { MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
639 /* descriptor present */
640 static const StreamType DESC_types[] = {
641 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
642 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
643 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
644 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
645 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
649 static void mpegts_find_stream_type(AVStream *st,
650 uint32_t stream_type, const StreamType *types)
652 if (avcodec_is_open(st->codec)) {
653 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
657 for (; types->stream_type; types++) {
658 if (stream_type == types->stream_type) {
659 st->codec->codec_type = types->codec_type;
660 st->codec->codec_id = types->codec_id;
661 st->request_probe = 0;
667 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
668 uint32_t stream_type, uint32_t prog_reg_desc)
670 int old_codec_type= st->codec->codec_type;
671 int old_codec_id = st->codec->codec_id;
673 if (avcodec_is_open(st->codec)) {
674 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
678 avpriv_set_pts_info(st, 33, 1, 90000);
680 st->codec->codec_type = AVMEDIA_TYPE_DATA;
681 st->codec->codec_id = AV_CODEC_ID_NONE;
682 st->need_parsing = AVSTREAM_PARSE_FULL;
684 pes->stream_type = stream_type;
686 av_log(pes->stream, AV_LOG_DEBUG,
687 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
688 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
690 st->codec->codec_tag = pes->stream_type;
692 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
693 if ((prog_reg_desc == AV_RL32("HDMV") ||
694 prog_reg_desc == AV_RL32("HDPR")) &&
695 st->codec->codec_id == AV_CODEC_ID_NONE) {
696 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
697 if (pes->stream_type == 0x83) {
698 // HDMV TrueHD streams also contain an AC3 coded version of the
699 // audio track - add a second stream for this
701 // priv_data cannot be shared between streams
702 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
704 return AVERROR(ENOMEM);
705 memcpy(sub_pes, pes, sizeof(*sub_pes));
707 sub_st = avformat_new_stream(pes->stream, NULL);
710 return AVERROR(ENOMEM);
713 sub_st->id = pes->pid;
714 avpriv_set_pts_info(sub_st, 33, 1, 90000);
715 sub_st->priv_data = sub_pes;
716 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
717 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
718 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
719 sub_pes->sub_st = pes->sub_st = sub_st;
722 if (st->codec->codec_id == AV_CODEC_ID_NONE)
723 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
724 if (st->codec->codec_id == AV_CODEC_ID_NONE){
725 st->codec->codec_id = old_codec_id;
726 st->codec->codec_type= old_codec_type;
732 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
736 pkt->buf = pes->buffer;
737 pkt->data = pes->buffer->data;
738 pkt->size = pes->data_index;
740 if(pes->total_size != MAX_PES_PAYLOAD &&
741 pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) {
742 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
743 pes->flags |= AV_PKT_FLAG_CORRUPT;
745 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
747 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
748 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
749 pkt->stream_index = pes->sub_st->index;
751 pkt->stream_index = pes->st->index;
754 /* store position of first TS packet of this PES packet */
755 pkt->pos = pes->ts_packet_pos;
756 pkt->flags = pes->flags;
758 /* reset pts values */
759 pes->pts = AV_NOPTS_VALUE;
760 pes->dts = AV_NOPTS_VALUE;
766 static uint64_t get_ts64(GetBitContext *gb, int bits)
768 if (get_bits_left(gb) < bits)
769 return AV_NOPTS_VALUE;
770 return get_bits64(gb, bits);
773 static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
776 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
777 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
778 int dts_flag = -1, cts_flag = -1;
779 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
781 init_get_bits(&gb, buf, buf_size*8);
783 if (sl->use_au_start)
784 au_start_flag = get_bits1(&gb);
786 au_end_flag = get_bits1(&gb);
787 if (!sl->use_au_start && !sl->use_au_end)
788 au_start_flag = au_end_flag = 1;
790 ocr_flag = get_bits1(&gb);
792 idle_flag = get_bits1(&gb);
794 padding_flag = get_bits1(&gb);
796 padding_bits = get_bits(&gb, 3);
798 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
799 if (sl->packet_seq_num_len)
800 skip_bits_long(&gb, sl->packet_seq_num_len);
801 if (sl->degr_prior_len)
803 skip_bits(&gb, sl->degr_prior_len);
805 skip_bits_long(&gb, sl->ocr_len);
807 if (sl->use_rand_acc_pt)
809 if (sl->au_seq_num_len > 0)
810 skip_bits_long(&gb, sl->au_seq_num_len);
811 if (sl->use_timestamps) {
812 dts_flag = get_bits1(&gb);
813 cts_flag = get_bits1(&gb);
816 if (sl->inst_bitrate_len)
817 inst_bitrate_flag = get_bits1(&gb);
819 dts = get_ts64(&gb, sl->timestamp_len);
821 cts = get_ts64(&gb, sl->timestamp_len);
823 skip_bits_long(&gb, sl->au_len);
824 if (inst_bitrate_flag)
825 skip_bits_long(&gb, sl->inst_bitrate_len);
828 if (dts != AV_NOPTS_VALUE)
830 if (cts != AV_NOPTS_VALUE)
833 if (sl->timestamp_len && sl->timestamp_res)
834 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
836 return (get_bits_count(&gb) + 7) >> 3;
839 /* return non zero if a packet could be constructed */
840 static int mpegts_push_data(MpegTSFilter *filter,
841 const uint8_t *buf, int buf_size, int is_start,
842 int64_t pos, int64_t pcr)
844 PESContext *pes = filter->u.pes_filter.opaque;
845 MpegTSContext *ts = pes->ts;
856 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
857 new_pes_packet(pes, ts->pkt);
860 pes->state = MPEGTS_HEADER;
862 pes->ts_packet_pos = pos;
865 while (buf_size > 0) {
868 len = PES_START_SIZE - pes->data_index;
871 memcpy(pes->header + pes->data_index, p, len);
872 pes->data_index += len;
875 if (pes->data_index == PES_START_SIZE) {
876 /* we got all the PES or section header. We can now
878 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
879 pes->header[2] == 0x01) {
880 /* it must be an mpeg2 PES stream */
881 code = pes->header[3] | 0x100;
882 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
884 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
885 (!pes->sub_st || pes->sub_st->discard == AVDISCARD_ALL)) ||
886 code == 0x1be) /* padding_stream */
889 /* stream not present in PMT */
891 pes->st = avformat_new_stream(ts->stream, NULL);
893 return AVERROR(ENOMEM);
894 pes->st->id = pes->pid;
895 mpegts_set_stream_info(pes->st, pes, 0, 0);
898 pes->total_size = AV_RB16(pes->header + 4);
899 /* NOTE: a zero total size means the PES size is
901 if (!pes->total_size)
902 pes->total_size = MAX_PES_PAYLOAD;
904 /* allocate pes buffer */
905 pes->buffer = av_buffer_alloc(pes->total_size +
906 FF_INPUT_BUFFER_PADDING_SIZE);
908 return AVERROR(ENOMEM);
910 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
911 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
912 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
913 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
914 pes->state = MPEGTS_PESHEADER;
915 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
916 av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
917 pes->pid, pes->stream_type);
918 pes->st->request_probe= 1;
921 pes->state = MPEGTS_PAYLOAD;
925 /* otherwise, it should be a table */
928 pes->state = MPEGTS_SKIP;
933 /**********************************************/
934 /* PES packing parsing */
935 case MPEGTS_PESHEADER:
936 len = PES_HEADER_SIZE - pes->data_index;
941 memcpy(pes->header + pes->data_index, p, len);
942 pes->data_index += len;
945 if (pes->data_index == PES_HEADER_SIZE) {
946 pes->pes_header_size = pes->header[8] + 9;
947 pes->state = MPEGTS_PESHEADER_FILL;
950 case MPEGTS_PESHEADER_FILL:
951 len = pes->pes_header_size - pes->data_index;
956 memcpy(pes->header + pes->data_index, p, len);
957 pes->data_index += len;
960 if (pes->data_index == pes->pes_header_size) {
962 unsigned int flags, pes_ext, skip;
964 flags = pes->header[7];
966 pes->pts = AV_NOPTS_VALUE;
967 pes->dts = AV_NOPTS_VALUE;
968 if ((flags & 0xc0) == 0x80) {
969 pes->dts = pes->pts = ff_parse_pes_pts(r);
971 } else if ((flags & 0xc0) == 0xc0) {
972 pes->pts = ff_parse_pes_pts(r);
974 pes->dts = ff_parse_pes_pts(r);
977 pes->extended_stream_id = -1;
978 if (flags & 0x01) { /* PES extension */
980 /* Skip PES private data, program packet sequence counter and P-STD buffer */
981 skip = (pes_ext >> 4) & 0xb;
984 if ((pes_ext & 0x41) == 0x01 &&
985 (r + 2) <= (pes->header + pes->pes_header_size)) {
986 /* PES extension 2 */
987 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
988 pes->extended_stream_id = r[1];
992 /* we got the full header. We parse it and get the payload */
993 pes->state = MPEGTS_PAYLOAD;
995 if (pes->stream_type == 0x12 && buf_size > 0) {
996 int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size);
997 pes->pes_header_size += sl_header_bytes;
998 p += sl_header_bytes;
999 buf_size -= sl_header_bytes;
1001 if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1002 AVProgram *p = NULL;
1003 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1004 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1005 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1006 if (f && f->type == MPEGTS_PES) {
1007 PESContext *pcrpes = f->u.pes_filter.opaque;
1008 if (pcrpes && pcrpes->last_pcr != -1 && pcrpes->st && pcrpes->st->discard != AVDISCARD_ALL) {
1009 // teletext packets do not always have correct timestamps,
1010 // the standard says they should be handled after 40.6 ms at most,
1011 // and the pcr error to this packet should be no more than 100 ms.
1012 // TODO: we should interpolate the PCR, not just use the last one
1013 int64_t pcr = pcrpes->last_pcr / 300;
1014 pes->st->pts_wrap_reference = pcrpes->st->pts_wrap_reference;
1015 pes->st->pts_wrap_behavior = pcrpes->st->pts_wrap_behavior;
1016 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1017 pes->pts = pes->dts = pcr;
1018 } else if (pes->dts > pcr + 3654 + 9000) {
1019 pes->pts = pes->dts = pcr + 3654 + 9000;
1029 case MPEGTS_PAYLOAD:
1030 if (buf_size > 0 && pes->buffer) {
1031 if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
1032 new_pes_packet(pes, ts->pkt);
1033 pes->total_size = MAX_PES_PAYLOAD;
1034 pes->buffer = av_buffer_alloc(pes->total_size + FF_INPUT_BUFFER_PADDING_SIZE);
1036 return AVERROR(ENOMEM);
1038 } else if (pes->data_index == 0 && buf_size > pes->total_size) {
1039 // pes packet size is < ts size packet and pes data is padded with 0xff
1040 // not sure if this is legal in ts but see issue #2392
1041 buf_size = pes->total_size;
1043 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1044 pes->data_index += buf_size;
1047 /* emit complete packets with known packet size
1048 * decreases demuxer delay for infrequent packets like subtitles from
1049 * a couple of seconds to milliseconds for properly muxed files.
1050 * total_size is the number of bytes following pes_packet_length
1051 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1052 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1053 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1055 new_pes_packet(pes, ts->pkt);
1067 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1072 /* if no pid found, then add a pid context */
1073 pes = av_mallocz(sizeof(PESContext));
1077 pes->stream = ts->stream;
1079 pes->pcr_pid = pcr_pid;
1080 pes->state = MPEGTS_SKIP;
1081 pes->pts = AV_NOPTS_VALUE;
1082 pes->dts = AV_NOPTS_VALUE;
1084 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1097 Mp4Descr *active_descr;
1099 int max_descr_count;
1101 } MP4DescrParseContext;
1103 static int init_MP4DescrParseContext(
1104 MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf,
1105 unsigned size, Mp4Descr *descr, int max_descr_count)
1109 return AVERROR_INVALIDDATA;
1111 if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0,
1112 NULL, NULL, NULL, NULL)) < 0)
1119 d->active_descr = NULL;
1120 d->max_descr_count = max_descr_count;
1125 static void update_offsets(AVIOContext *pb, int64_t *off, int *len) {
1126 int64_t new_off = avio_tell(pb);
1127 (*len) -= new_off - *off;
1131 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1134 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1137 if (parse_mp4_descr(d, off, len, 0) < 0)
1139 update_offsets(&d->pb, &off, &len);
1144 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1146 avio_rb16(&d->pb); // ID
1152 update_offsets(&d->pb, &off, &len);
1153 return parse_mp4_descr_arr(d, off, len);
1156 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1161 id_flags = avio_rb16(&d->pb);
1162 if (!(id_flags & 0x0020)) { //URL_Flag
1163 update_offsets(&d->pb, &off, &len);
1164 return parse_mp4_descr_arr(d, off, len); //ES_Descriptor[]
1170 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1173 if (d->descr_count >= d->max_descr_count)
1175 ff_mp4_parse_es_descr(&d->pb, &es_id);
1176 d->active_descr = d->descr + (d->descr_count++);
1178 d->active_descr->es_id = es_id;
1179 update_offsets(&d->pb, &off, &len);
1180 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1181 update_offsets(&d->pb, &off, &len);
1183 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1184 d->active_descr = NULL;
1188 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1190 Mp4Descr *descr = d->active_descr;
1193 d->active_descr->dec_config_descr = av_malloc(len);
1194 if (!descr->dec_config_descr)
1195 return AVERROR(ENOMEM);
1196 descr->dec_config_descr_len = len;
1197 avio_read(&d->pb, descr->dec_config_descr, len);
1201 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1203 Mp4Descr *descr = d->active_descr;
1208 predefined = avio_r8(&d->pb);
1211 int flags = avio_r8(&d->pb);
1212 descr->sl.use_au_start = !!(flags & 0x80);
1213 descr->sl.use_au_end = !!(flags & 0x40);
1214 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1215 descr->sl.use_padding = !!(flags & 0x08);
1216 descr->sl.use_timestamps = !!(flags & 0x04);
1217 descr->sl.use_idle = !!(flags & 0x02);
1218 descr->sl.timestamp_res = avio_rb32(&d->pb);
1220 descr->sl.timestamp_len = avio_r8(&d->pb);
1221 descr->sl.ocr_len = avio_r8(&d->pb);
1222 descr->sl.au_len = avio_r8(&d->pb);
1223 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1224 lengths = avio_rb16(&d->pb);
1225 descr->sl.degr_prior_len = lengths >> 12;
1226 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1227 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1229 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1234 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1237 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1238 update_offsets(&d->pb, &off, &len);
1239 if (len < 0 || len1 > len || len1 <= 0) {
1240 av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len);
1244 if (d->level++ >= MAX_LEVEL) {
1245 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1249 if (target_tag && tag != target_tag) {
1250 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag);
1256 parse_MP4IODescrTag(d, off, len1);
1259 parse_MP4ODescrTag(d, off, len1);
1262 parse_MP4ESDescrTag(d, off, len1);
1264 case MP4DecConfigDescrTag:
1265 parse_MP4DecConfigDescrTag(d, off, len1);
1268 parse_MP4SLDescrTag(d, off, len1);
1274 avio_seek(&d->pb, off + len1, SEEK_SET);
1278 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1279 Mp4Descr *descr, int *descr_count, int max_descr_count)
1281 MP4DescrParseContext d;
1282 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1285 parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1287 *descr_count = d.descr_count;
1291 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1292 Mp4Descr *descr, int *descr_count, int max_descr_count)
1294 MP4DescrParseContext d;
1295 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1298 parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1300 *descr_count = d.descr_count;
1304 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1306 MpegTSContext *ts = filter->u.section_filter.opaque;
1308 const uint8_t *p, *p_end;
1310 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1311 int mp4_descr_count = 0;
1313 AVFormatContext *s = ts->stream;
1315 p_end = section + section_len - 4;
1317 if (parse_section_header(&h, &p, p_end) < 0)
1319 if (h.tid != M4OD_TID)
1322 mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1324 for (pid = 0; pid < NB_PID_MAX; pid++) {
1327 for (i = 0; i < mp4_descr_count; i++) {
1330 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1332 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
1333 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1336 pes = ts->pids[pid]->u.pes_filter.opaque;
1342 pes->sl = mp4_descr[i].sl;
1344 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1345 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1346 ff_mp4_read_dec_config_descr(s, st, &pb);
1347 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1348 st->codec->extradata_size > 0)
1349 st->need_parsing = 0;
1350 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1351 st->codec->extradata_size > 0)
1352 st->need_parsing = 0;
1354 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1355 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) {
1356 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1357 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) {
1358 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1359 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) {
1360 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1364 for (i = 0; i < mp4_descr_count; i++)
1365 av_free(mp4_descr[i].dec_config_descr);
1368 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1369 const uint8_t **pp, const uint8_t *desc_list_end,
1370 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1373 const uint8_t *desc_end;
1374 int desc_len, desc_tag, desc_es_id;
1378 desc_tag = get8(pp, desc_list_end);
1381 desc_len = get8(pp, desc_list_end);
1384 desc_end = *pp + desc_len;
1385 if (desc_end > desc_list_end)
1388 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1390 if (st->codec->codec_id == AV_CODEC_ID_NONE &&
1391 stream_type == STREAM_TYPE_PRIVATE_DATA)
1392 mpegts_find_stream_type(st, desc_tag, DESC_types);
1395 case 0x1E: /* SL descriptor */
1396 desc_es_id = get16(pp, desc_end);
1397 if (ts && ts->pids[pid])
1398 ts->pids[pid]->es_id = desc_es_id;
1399 for (i = 0; i < mp4_descr_count; i++)
1400 if (mp4_descr[i].dec_config_descr_len &&
1401 mp4_descr[i].es_id == desc_es_id) {
1403 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1404 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1405 ff_mp4_read_dec_config_descr(fc, st, &pb);
1406 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1407 st->codec->extradata_size > 0)
1408 st->need_parsing = 0;
1409 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1410 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1413 case 0x1F: /* FMC descriptor */
1414 get16(pp, desc_end);
1415 if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe>0) &&
1416 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1418 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1419 mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1420 ff_mp4_read_dec_config_descr(fc, st, &pb);
1421 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1422 st->codec->extradata_size > 0){
1423 st->request_probe= st->need_parsing = 0;
1424 st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
1428 case 0x56: /* DVB teletext descriptor */
1429 language[0] = get8(pp, desc_end);
1430 language[1] = get8(pp, desc_end);
1431 language[2] = get8(pp, desc_end);
1433 av_dict_set(&st->metadata, "language", language, 0);
1435 case 0x59: /* subtitling descriptor */
1436 language[0] = get8(pp, desc_end);
1437 language[1] = get8(pp, desc_end);
1438 language[2] = get8(pp, desc_end);
1440 /* hearing impaired subtitles detection */
1441 switch(get8(pp, desc_end)) {
1442 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1443 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1444 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1445 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1446 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1447 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1448 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1451 if (st->codec->extradata) {
1452 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
1453 avpriv_request_sample(fc, "DVB sub with multiple IDs");
1455 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
1456 if (st->codec->extradata) {
1457 st->codec->extradata_size = 4;
1458 memcpy(st->codec->extradata, *pp, 4);
1462 av_dict_set(&st->metadata, "language", language, 0);
1464 case 0x0a: /* ISO 639 language descriptor */
1465 for (i = 0; i + 4 <= desc_len; i += 4) {
1466 language[i + 0] = get8(pp, desc_end);
1467 language[i + 1] = get8(pp, desc_end);
1468 language[i + 2] = get8(pp, desc_end);
1469 language[i + 3] = ',';
1470 switch (get8(pp, desc_end)) {
1471 case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
1472 case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
1473 case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
1477 language[i - 1] = 0;
1478 av_dict_set(&st->metadata, "language", language, 0);
1481 case 0x05: /* registration descriptor */
1482 st->codec->codec_tag = bytestream_get_le32(pp);
1483 av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
1484 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1485 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1487 case 0x52: /* stream identifier descriptor */
1488 st->stream_identifier = 1 + get8(pp, desc_end);
1497 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1499 MpegTSContext *ts = filter->u.section_filter.opaque;
1500 SectionHeader h1, *h = &h1;
1503 const uint8_t *p, *p_end, *desc_list_end;
1504 int program_info_length, pcr_pid, pid, stream_type;
1506 uint32_t prog_reg_desc = 0; /* registration descriptor */
1508 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1509 int mp4_descr_count = 0;
1512 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1513 hex_dump_debug(ts->stream, section, section_len);
1515 p_end = section + section_len - 4;
1517 if (parse_section_header(h, &p, p_end) < 0)
1520 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
1521 h->id, h->sec_num, h->last_sec_num);
1523 if (h->tid != PMT_TID)
1526 clear_program(ts, h->id);
1527 pcr_pid = get16(&p, p_end);
1531 add_pid_to_pmt(ts, h->id, pcr_pid);
1532 set_pcr_pid(ts->stream, h->id, pcr_pid);
1534 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1536 program_info_length = get16(&p, p_end);
1537 if (program_info_length < 0)
1539 program_info_length &= 0xfff;
1540 while(program_info_length >= 2) {
1542 tag = get8(&p, p_end);
1543 len = get8(&p, p_end);
1545 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1547 if(len > program_info_length - 2)
1548 //something else is broken, exit the program_descriptors_loop
1550 program_info_length -= len + 2;
1551 if (tag == 0x1d) { // IOD descriptor
1552 get8(&p, p_end); // scope
1553 get8(&p, p_end); // label
1555 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1556 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1557 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1558 prog_reg_desc = bytestream_get_le32(&p);
1563 p += program_info_length;
1567 // stop parsing after pmt, we found header
1568 if (!ts->stream->nb_streams)
1574 stream_type = get8(&p, p_end);
1575 if (stream_type < 0)
1577 pid = get16(&p, p_end);
1581 if (pid == ts->current_pid)
1584 /* now create stream */
1585 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1586 pes = ts->pids[pid]->u.pes_filter.opaque;
1588 pes->st = avformat_new_stream(pes->stream, NULL);
1591 pes->st->id = pes->pid;
1594 } else if (stream_type != 0x13) {
1595 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
1596 pes = add_pes_stream(ts, pid, pcr_pid);
1598 st = avformat_new_stream(pes->stream, NULL);
1604 int idx = ff_find_stream_index(ts->stream, pid);
1606 st = ts->stream->streams[idx];
1608 st = avformat_new_stream(ts->stream, NULL);
1612 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1619 if (pes && !pes->stream_type)
1620 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1622 add_pid_to_pmt(ts, h->id, pid);
1624 ff_program_add_stream_index(ts->stream, h->id, st->index);
1626 desc_list_len = get16(&p, p_end);
1627 if (desc_list_len < 0)
1629 desc_list_len &= 0xfff;
1630 desc_list_end = p + desc_list_len;
1631 if (desc_list_end > p_end)
1634 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
1635 mp4_descr, mp4_descr_count, pid, ts) < 0)
1638 if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
1639 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
1640 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1647 for (i = 0; i < mp4_descr_count; i++)
1648 av_free(mp4_descr[i].dec_config_descr);
1651 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1653 MpegTSContext *ts = filter->u.section_filter.opaque;
1654 SectionHeader h1, *h = &h1;
1655 const uint8_t *p, *p_end;
1659 av_dlog(ts->stream, "PAT:\n");
1660 hex_dump_debug(ts->stream, section, section_len);
1662 p_end = section + section_len - 4;
1664 if (parse_section_header(h, &p, p_end) < 0)
1666 if (h->tid != PAT_TID)
1669 ts->stream->ts_id = h->id;
1673 sid = get16(&p, p_end);
1676 pmt_pid = get16(&p, p_end);
1681 if (pmt_pid == ts->current_pid)
1684 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1686 if (sid == 0x0000) {
1689 MpegTSFilter *fil = ts->pids[pmt_pid];
1690 program = av_new_program(ts->stream, sid);
1691 program->program_num = sid;
1692 program->pmt_pid = pmt_pid;
1694 if ( fil->type != MPEGTS_SECTION
1695 || fil->pid != pmt_pid
1696 || fil->u.section_filter.section_cb != pmt_cb)
1697 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1699 if (!ts->pids[pmt_pid])
1700 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1701 add_pat_entry(ts, sid);
1702 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
1703 add_pid_to_pmt(ts, sid, pmt_pid);
1709 for (j=0; j<ts->stream->nb_programs; j++) {
1710 for (i=0; i<ts->nb_prg; i++)
1711 if (ts->prg[i].id == ts->stream->programs[j]->id)
1714 clear_avprogram(ts, ts->stream->programs[j]->id);
1719 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1721 MpegTSContext *ts = filter->u.section_filter.opaque;
1722 SectionHeader h1, *h = &h1;
1723 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1724 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1725 char *name, *provider_name;
1727 av_dlog(ts->stream, "SDT:\n");
1728 hex_dump_debug(ts->stream, section, section_len);
1730 p_end = section + section_len - 4;
1732 if (parse_section_header(h, &p, p_end) < 0)
1734 if (h->tid != SDT_TID)
1736 onid = get16(&p, p_end);
1739 val = get8(&p, p_end);
1743 sid = get16(&p, p_end);
1746 val = get8(&p, p_end);
1749 desc_list_len = get16(&p, p_end);
1750 if (desc_list_len < 0)
1752 desc_list_len &= 0xfff;
1753 desc_list_end = p + desc_list_len;
1754 if (desc_list_end > p_end)
1757 desc_tag = get8(&p, desc_list_end);
1760 desc_len = get8(&p, desc_list_end);
1761 desc_end = p + desc_len;
1762 if (desc_end > desc_list_end)
1765 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
1766 desc_tag, desc_len);
1770 service_type = get8(&p, p_end);
1771 if (service_type < 0)
1773 provider_name = getstr8(&p, p_end);
1776 name = getstr8(&p, p_end);
1778 AVProgram *program = av_new_program(ts->stream, sid);
1780 av_dict_set(&program->metadata, "service_name", name, 0);
1781 av_dict_set(&program->metadata, "service_provider", provider_name, 0);
1785 av_free(provider_name);
1796 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1797 const uint8_t *packet);
1799 /* handle one TS packet */
1800 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1802 AVFormatContext *s = ts->stream;
1804 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
1805 has_adaptation, has_payload;
1806 const uint8_t *p, *p_end;
1809 pid = AV_RB16(packet + 1) & 0x1fff;
1810 if(pid && discard_pid(ts, pid))
1812 is_start = packet[1] & 0x40;
1813 tss = ts->pids[pid];
1814 if (ts->auto_guess && tss == NULL && is_start) {
1815 add_pes_stream(ts, pid, -1);
1816 tss = ts->pids[pid];
1820 ts->current_pid = pid;
1822 afc = (packet[3] >> 4) & 3;
1823 if (afc == 0) /* reserved value */
1825 has_adaptation = afc & 2;
1826 has_payload = afc & 1;
1827 is_discontinuity = has_adaptation
1828 && packet[4] != 0 /* with length > 0 */
1829 && (packet[5] & 0x80); /* and discontinuity indicated */
1831 /* continuity check (currently not used) */
1832 cc = (packet[3] & 0xf);
1833 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
1834 cc_ok = pid == 0x1FFF // null packet PID
1837 || expected_cc == cc;
1841 av_log(ts->stream, AV_LOG_DEBUG,
1842 "Continuity check failed for pid %d expected %d got %d\n",
1843 pid, expected_cc, cc);
1844 if(tss->type == MPEGTS_PES) {
1845 PESContext *pc = tss->u.pes_filter.opaque;
1846 pc->flags |= AV_PKT_FLAG_CORRUPT;
1853 if (has_adaptation) {
1854 /* skip adaptation field */
1857 /* if past the end of packet, ignore */
1858 p_end = packet + TS_PACKET_SIZE;
1862 pos = avio_tell(ts->stream->pb);
1863 MOD_UNLIKELY(ts->pos47, pos, ts->raw_packet_size, ts->pos);
1865 if (tss->type == MPEGTS_SECTION) {
1867 /* pointer field present */
1869 if (p + len > p_end)
1872 /* write remaining section bytes */
1873 write_section_data(s, tss,
1875 /* check whether filter has been closed */
1881 write_section_data(s, tss,
1886 write_section_data(s, tss,
1895 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
1896 pcr = pcr_h * 300 + pcr_l;
1897 // Note: The position here points actually behind the current packet.
1898 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1899 pos - ts->raw_packet_size, pcr)) < 0)
1906 /* XXX: try to find a better synchro over several packets (use
1907 get_packet_size() ?) */
1908 static int mpegts_resync(AVFormatContext *s)
1910 AVIOContext *pb = s->pb;
1913 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1918 avio_seek(pb, -1, SEEK_CUR);
1922 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1927 /* return -1 if error or EOF. Return 0 if OK. */
1928 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, uint8_t **data)
1930 AVIOContext *pb = s->pb;
1934 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
1935 if (len != TS_PACKET_SIZE)
1936 return len < 0 ? len : AVERROR_EOF;
1937 /* check packet sync byte */
1938 if ((*data)[0] != 0x47) {
1939 /* find a new packet start */
1940 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1941 if (mpegts_resync(s) < 0)
1942 return AVERROR(EAGAIN);
1952 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
1954 AVIOContext *pb = s->pb;
1955 int skip = raw_packet_size - TS_PACKET_SIZE;
1957 avio_skip(pb, skip);
1960 static int handle_packets(MpegTSContext *ts, int nb_packets)
1962 AVFormatContext *s = ts->stream;
1963 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
1965 int packet_num, ret = 0;
1967 if (avio_tell(s->pb) != ts->last_pos) {
1969 av_dlog(ts->stream, "Skipping after seek\n");
1970 /* seek detected, flush pes buffer */
1971 for (i = 0; i < NB_PID_MAX; i++) {
1973 if (ts->pids[i]->type == MPEGTS_PES) {
1974 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1975 av_buffer_unref(&pes->buffer);
1976 pes->data_index = 0;
1977 pes->state = MPEGTS_SKIP; /* skip until pes header */
1980 ts->pids[i]->last_cc = -1;
1987 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1990 if (nb_packets != 0 && packet_num >= nb_packets ||
1991 ts->stop_parse > 1) {
1992 ret = AVERROR(EAGAIN);
1995 if (ts->stop_parse > 0)
1998 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2001 ret = handle_packet(ts, data);
2002 finished_reading_packet(s, ts->raw_packet_size);
2006 ts->last_pos = avio_tell(s->pb);
2010 static int mpegts_probe(AVProbeData *p)
2012 const int size= p->buf_size;
2016 int check_count= size / TS_FEC_PACKET_SIZE;
2017 #define CHECK_COUNT 10
2018 #define CHECK_BLOCK 100
2020 if (check_count < CHECK_COUNT)
2023 for (i=0; i<check_count; i+=CHECK_BLOCK){
2024 int left = FFMIN(check_count - i, CHECK_BLOCK);
2025 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL);
2026 int dvhs_score= analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
2027 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
2028 score = FFMAX3(score, dvhs_score, fec_score);
2030 maxscore = FFMAX(maxscore, score);
2033 sumscore = sumscore*CHECK_COUNT/check_count;
2034 maxscore = maxscore*CHECK_COUNT/CHECK_BLOCK;
2036 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2038 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2039 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2043 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2044 (-1) if not available */
2045 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2046 const uint8_t *packet)
2048 int afc, len, flags;
2052 afc = (packet[3] >> 4) & 3;
2062 if (!(flags & 0x10))
2067 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
2068 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2072 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2074 /* NOTE: We attempt to seek on non-seekable files as well, as the
2075 * probe buffer usually is big enough. Only warn if the seek failed
2076 * on files where the seek should work. */
2077 if (avio_seek(pb, pos, SEEK_SET) < 0)
2078 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2081 static int mpegts_read_header(AVFormatContext *s)
2083 MpegTSContext *ts = s->priv_data;
2084 AVIOContext *pb = s->pb;
2085 uint8_t buf[8*1024]={0};
2089 ffio_ensure_seekback(pb, s->probesize);
2091 /* read the first 8192 bytes to get packet size */
2092 pos = avio_tell(pb);
2093 len = avio_read(pb, buf, sizeof(buf));
2094 ts->raw_packet_size = get_packet_size(buf, len);
2095 if (ts->raw_packet_size <= 0) {
2096 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2097 ts->raw_packet_size = TS_PACKET_SIZE;
2102 if (s->iformat == &ff_mpegts_demuxer) {
2105 /* first do a scan to get all the services */
2106 seek_back(s, pb, pos);
2108 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2110 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2112 handle_packets(ts, s->probesize / ts->raw_packet_size);
2113 /* if could not find service, enable auto_guess */
2117 av_dlog(ts->stream, "tuning done\n");
2119 s->ctx_flags |= AVFMTCTX_NOHEADER;
2122 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2123 int64_t pcrs[2], pcr_h;
2124 int packet_count[2];
2125 uint8_t packet[TS_PACKET_SIZE];
2128 /* only read packets */
2130 st = avformat_new_stream(s, NULL);
2133 avpriv_set_pts_info(st, 60, 1, 27000000);
2134 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2135 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2137 /* we iterate until we find two PCRs to estimate the bitrate */
2142 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2145 pid = AV_RB16(data + 1) & 0x1fff;
2146 if ((pcr_pid == -1 || pcr_pid == pid) &&
2147 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2148 finished_reading_packet(s, ts->raw_packet_size);
2150 packet_count[nb_pcrs] = nb_packets;
2151 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2156 finished_reading_packet(s, ts->raw_packet_size);
2161 /* NOTE1: the bitrate is computed without the FEC */
2162 /* NOTE2: it is only the bitrate of the start of the stream */
2163 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2164 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2165 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
2166 st->codec->bit_rate = s->bit_rate;
2167 st->start_time = ts->cur_pcr;
2168 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2169 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2172 seek_back(s, pb, pos);
2178 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2180 static int mpegts_raw_read_packet(AVFormatContext *s,
2183 MpegTSContext *ts = s->priv_data;
2185 int64_t pcr_h, next_pcr_h, pos;
2186 int pcr_l, next_pcr_l;
2187 uint8_t pcr_buf[12];
2190 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2191 return AVERROR(ENOMEM);
2192 pkt->pos= avio_tell(s->pb);
2193 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2195 av_free_packet(pkt);
2198 if (data != pkt->data)
2199 memcpy(pkt->data, data, ts->raw_packet_size);
2200 finished_reading_packet(s, ts->raw_packet_size);
2201 if (ts->mpeg2ts_compute_pcr) {
2202 /* compute exact PCR for each packet */
2203 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2204 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2205 pos = avio_tell(s->pb);
2206 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
2207 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2208 avio_read(s->pb, pcr_buf, 12);
2209 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2210 /* XXX: not precise enough */
2211 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2216 avio_seek(s->pb, pos, SEEK_SET);
2217 /* no next PCR found: we use previous increment */
2218 ts->cur_pcr = pcr_h * 300 + pcr_l;
2220 pkt->pts = ts->cur_pcr;
2221 pkt->duration = ts->pcr_incr;
2222 ts->cur_pcr += ts->pcr_incr;
2224 pkt->stream_index = 0;
2228 static int mpegts_read_packet(AVFormatContext *s,
2231 MpegTSContext *ts = s->priv_data;
2236 ret = handle_packets(ts, 0);
2238 av_free_packet(ts->pkt);
2239 /* flush pes data left */
2240 for (i = 0; i < NB_PID_MAX; i++) {
2241 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2242 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2243 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2244 new_pes_packet(pes, pkt);
2245 pes->state = MPEGTS_SKIP;
2253 if (!ret && pkt->size < 0)
2254 ret = AVERROR(EINTR);
2258 static void mpegts_free(MpegTSContext *ts)
2264 for(i=0;i<NB_PID_MAX;i++)
2265 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
2268 static int mpegts_read_close(AVFormatContext *s)
2270 MpegTSContext *ts = s->priv_data;
2275 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2276 int64_t *ppos, int64_t pos_limit)
2278 MpegTSContext *ts = s->priv_data;
2279 int64_t pos, timestamp;
2280 uint8_t buf[TS_PACKET_SIZE];
2281 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
2282 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
2283 while(pos < pos_limit) {
2284 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2285 return AV_NOPTS_VALUE;
2286 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2287 return AV_NOPTS_VALUE;
2288 if (buf[0] != 0x47) {
2289 if (mpegts_resync(s) < 0)
2290 return AV_NOPTS_VALUE;
2291 pos = avio_tell(s->pb);
2294 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2295 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2299 pos += ts->raw_packet_size;
2302 return AV_NOPTS_VALUE;
2305 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2306 int64_t *ppos, int64_t pos_limit)
2308 MpegTSContext *ts = s->priv_data;
2310 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->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,