2 * MPEG2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 "libavcodec/bytestream.h"
30 #include "libavcodec/get_bits.h"
31 #include "libavcodec/opus.h"
35 #include "avio_internal.h"
39 /* maximum size in which we look for synchronisation if
40 * synchronisation is lost */
41 #define MAX_RESYNC_SIZE 65536
43 #define MAX_PES_PAYLOAD 200 * 1024
45 #define MAX_MP4_DESCR_COUNT 16
47 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
49 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
50 (modulus) = (dividend) % (divisor); \
51 (prev_dividend) = (dividend); \
54 enum MpegTSFilterType {
59 typedef struct MpegTSFilter MpegTSFilter;
61 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
62 int is_start, int64_t pos);
64 typedef struct MpegTSPESFilter {
69 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
71 typedef void SetServiceCallback (void *opaque, int ret);
73 typedef struct MpegTSSectionFilter {
78 unsigned int check_crc : 1;
79 unsigned int end_of_section_reached : 1;
80 SectionCallback *section_cb;
82 } MpegTSSectionFilter;
87 int last_cc; /* last cc code (-1 if first packet) */
88 enum MpegTSFilterType type;
90 MpegTSPESFilter pes_filter;
91 MpegTSSectionFilter section_filter;
95 #define MAX_PIDS_PER_PROGRAM 64
97 unsigned int id; // program id/service id
99 unsigned int pids[MAX_PIDS_PER_PROGRAM];
102 struct MpegTSContext {
103 const AVClass *class;
105 AVFormatContext *stream;
106 /** raw packet size, including FEC if present */
110 /** position corresponding to pos47, or 0 if pos47 invalid */
113 /** if true, all pids are analyzed to find streams */
116 /** compute exact PCR for each transport stream packet */
117 int mpeg2ts_compute_pcr;
119 int64_t cur_pcr; /**< used to estimate the exact PCR */
120 int pcr_incr; /**< used to estimate the exact PCR */
122 /* data needed to handle file based ts */
123 /** stop parsing loop */
125 /** packet containing Audio/Video data */
127 /** to detect seek */
132 /******************************************/
133 /* private mpegts data */
135 /** structure to keep track of Program->pids mapping */
139 /** filters for various streams specified by PMT + for the PAT and PMT */
140 MpegTSFilter *pids[NB_PID_MAX];
143 #define MPEGTS_OPTIONS \
144 { "resync_size", "Size limit for looking up a new syncronization.", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
146 static const AVOption options[] = {
151 static const AVClass mpegts_class = {
152 .class_name = "mpegts demuxer",
153 .item_name = av_default_item_name,
155 .version = LIBAVUTIL_VERSION_INT,
158 static const AVOption raw_options[] = {
160 { "compute_pcr", "Compute exact PCR for each transport stream packet.",
161 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
162 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
163 { "ts_packetsize", "Output option carrying the raw packet size.",
164 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
166 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
170 static const AVClass mpegtsraw_class = {
171 .class_name = "mpegtsraw demuxer",
172 .item_name = av_default_item_name,
173 .option = raw_options,
174 .version = LIBAVUTIL_VERSION_INT,
177 /* TS stream handling */
182 MPEGTS_PESHEADER_FILL,
187 /* enough for PES header + length */
188 #define PES_START_SIZE 6
189 #define PES_HEADER_SIZE 9
190 #define MAX_PES_HEADER_SIZE (9 + 255)
192 typedef struct PESContext {
194 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
197 AVFormatContext *stream;
199 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
200 enum MpegTSState state;
201 /* used to get the format */
203 int flags; /**< copied to the AVPacket flags */
206 int extended_stream_id;
208 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
209 uint8_t header[MAX_PES_HEADER_SIZE];
214 extern AVInputFormat ff_mpegts_demuxer;
216 static void clear_program(MpegTSContext *ts, unsigned int programid)
220 for (i = 0; i < ts->nb_prg; i++)
221 if (ts->prg[i].id == programid)
222 ts->prg[i].nb_pids = 0;
225 static void clear_programs(MpegTSContext *ts)
231 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
234 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
238 p = &ts->prg[ts->nb_prg];
244 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
248 struct Program *p = NULL;
249 for (i = 0; i < ts->nb_prg; i++) {
250 if (ts->prg[i].id == programid) {
258 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
260 p->pids[p->nb_pids++] = pid;
264 * @brief discard_pid() decides if the pid is to be discarded according
265 * to caller's programs selection
266 * @param ts : - TS context
268 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
271 static int discard_pid(MpegTSContext *ts, unsigned int pid)
274 int used = 0, discarded = 0;
277 /* If none of the programs have .discard=AVDISCARD_ALL then there's
278 * no way we have to discard this packet */
279 for (k = 0; k < ts->stream->nb_programs; k++)
280 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
282 if (k == ts->stream->nb_programs)
285 for (i = 0; i < ts->nb_prg; i++) {
287 for (j = 0; j < p->nb_pids; j++) {
288 if (p->pids[j] != pid)
290 // is program with id p->id set to be discarded?
291 for (k = 0; k < ts->stream->nb_programs; k++) {
292 if (ts->stream->programs[k]->id == p->id) {
293 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
302 return !used && discarded;
306 * Assemble PES packets out of TS packets, and then call the "section_cb"
307 * function when they are complete.
309 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
310 const uint8_t *buf, int buf_size, int is_start)
312 MpegTSSectionFilter *tss = &tss1->u.section_filter;
316 memcpy(tss->section_buf, buf, buf_size);
317 tss->section_index = buf_size;
318 tss->section_h_size = -1;
319 tss->end_of_section_reached = 0;
321 if (tss->end_of_section_reached)
323 len = 4096 - tss->section_index;
326 memcpy(tss->section_buf + tss->section_index, buf, len);
327 tss->section_index += len;
330 /* compute section length if possible */
331 if (tss->section_h_size == -1 && tss->section_index >= 3) {
332 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
335 tss->section_h_size = len;
338 if (tss->section_h_size != -1 &&
339 tss->section_index >= tss->section_h_size) {
340 tss->end_of_section_reached = 1;
341 if (!tss->check_crc ||
342 av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
343 tss->section_buf, tss->section_h_size) == 0)
344 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
348 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
350 SectionCallback *section_cb,
354 MpegTSFilter *filter;
355 MpegTSSectionFilter *sec;
357 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
359 if (pid >= NB_PID_MAX || ts->pids[pid])
361 filter = av_mallocz(sizeof(MpegTSFilter));
364 ts->pids[pid] = filter;
366 filter->type = MPEGTS_SECTION;
369 filter->last_cc = -1;
371 sec = &filter->u.section_filter;
372 sec->section_cb = section_cb;
373 sec->opaque = opaque;
374 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
375 sec->check_crc = check_crc;
378 if (!sec->section_buf) {
385 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
389 MpegTSFilter *filter;
390 MpegTSPESFilter *pes;
392 if (pid >= NB_PID_MAX || ts->pids[pid])
394 filter = av_mallocz(sizeof(MpegTSFilter));
398 ts->pids[pid] = filter;
399 filter->type = MPEGTS_PES;
402 filter->last_cc = -1;
404 pes = &filter->u.pes_filter;
405 pes->pes_cb = pes_cb;
406 pes->opaque = opaque;
410 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
415 if (filter->type == MPEGTS_SECTION)
416 av_freep(&filter->u.section_filter.section_buf);
417 else if (filter->type == MPEGTS_PES) {
418 PESContext *pes = filter->u.pes_filter.opaque;
419 av_buffer_unref(&pes->buffer);
420 /* referenced private data will be freed later in
421 * avformat_close_input */
422 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
423 av_freep(&filter->u.pes_filter.opaque);
428 ts->pids[pid] = NULL;
431 static int analyze(const uint8_t *buf, int size, int packet_size, int *index,
434 int stat[TS_MAX_PACKET_SIZE];
439 memset(stat, 0, packet_size * sizeof(int));
441 for (x = i = 0; i < size - 3; i++) {
442 if (buf[i] == 0x47 &&
443 (!probe || (!(buf[i + 1] & 0x80) && (buf[i + 3] & 0x30)))) {
445 if (stat[x] > best_score) {
446 best_score = stat[x];
453 if (x == packet_size)
460 /* autodetect fec presence. Must have at least 1024 bytes */
461 static int get_packet_size(const uint8_t *buf, int size)
463 int score, fec_score, dvhs_score;
465 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
466 return AVERROR_INVALIDDATA;
468 score = analyze(buf, size, TS_PACKET_SIZE, NULL, 0);
469 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL, 0);
470 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL, 0);
471 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
472 score, dvhs_score, fec_score);
474 if (score > fec_score && score > dvhs_score)
475 return TS_PACKET_SIZE;
476 else if (dvhs_score > score && dvhs_score > fec_score)
477 return TS_DVHS_PACKET_SIZE;
478 else if (score < fec_score && dvhs_score < fec_score)
479 return TS_FEC_PACKET_SIZE;
481 return AVERROR_INVALIDDATA;
484 typedef struct SectionHeader {
489 uint8_t last_sec_num;
492 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
499 return AVERROR_INVALIDDATA;
505 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
511 if ((p + 1) >= p_end)
512 return AVERROR_INVALIDDATA;
519 /* read and allocate a DVB string preceded by its length */
520 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
527 len = get8(&p, p_end);
530 if ((p + len) > p_end)
532 str = av_malloc(len + 1);
542 static int parse_section_header(SectionHeader *h,
543 const uint8_t **pp, const uint8_t *p_end)
547 val = get8(pp, p_end);
552 val = get16(pp, p_end);
556 val = get8(pp, p_end);
559 h->version = (val >> 1) & 0x1f;
560 val = get8(pp, p_end);
564 val = get8(pp, p_end);
567 h->last_sec_num = val;
571 typedef struct StreamType {
572 uint32_t stream_type;
573 enum AVMediaType codec_type;
574 enum AVCodecID codec_id;
577 static const StreamType ISO_types[] = {
578 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
579 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
580 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
581 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
582 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
583 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
584 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
585 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
586 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
587 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
588 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
589 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
590 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
594 static const StreamType HDMV_types[] = {
595 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
596 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
597 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
598 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
599 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
600 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
601 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
602 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
607 static const StreamType MISC_types[] = {
608 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
609 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
613 static const StreamType REGD_types[] = {
614 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
615 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
616 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
617 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
618 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
619 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
620 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
621 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
622 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
626 /* descriptor present */
627 static const StreamType DESC_types[] = {
628 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
629 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
630 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
631 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
632 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
636 static void mpegts_find_stream_type(AVStream *st,
637 uint32_t stream_type,
638 const StreamType *types)
640 for (; types->stream_type; types++)
641 if (stream_type == types->stream_type) {
642 st->codec->codec_type = types->codec_type;
643 st->codec->codec_id = types->codec_id;
648 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
649 uint32_t stream_type, uint32_t prog_reg_desc)
651 avpriv_set_pts_info(st, 33, 1, 90000);
653 st->codec->codec_type = AVMEDIA_TYPE_DATA;
654 st->codec->codec_id = AV_CODEC_ID_NONE;
655 st->need_parsing = AVSTREAM_PARSE_FULL;
657 pes->stream_type = stream_type;
659 av_log(pes->stream, AV_LOG_DEBUG,
660 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
661 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
663 st->codec->codec_tag = pes->stream_type;
665 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
666 if (prog_reg_desc == AV_RL32("HDMV") &&
667 st->codec->codec_id == AV_CODEC_ID_NONE) {
668 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
669 if (pes->stream_type == 0x83) {
670 // HDMV TrueHD streams also contain an AC3 coded version of the
671 // audio track - add a second stream for this
673 // priv_data cannot be shared between streams
674 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
676 return AVERROR(ENOMEM);
677 memcpy(sub_pes, pes, sizeof(*sub_pes));
679 sub_st = avformat_new_stream(pes->stream, NULL);
682 return AVERROR(ENOMEM);
685 sub_st->id = pes->pid;
686 avpriv_set_pts_info(sub_st, 33, 1, 90000);
687 sub_st->priv_data = sub_pes;
688 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
689 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
690 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
691 sub_pes->sub_st = pes->sub_st = sub_st;
694 if (st->codec->codec_id == AV_CODEC_ID_NONE)
695 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
700 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
704 pkt->buf = pes->buffer;
705 pkt->data = pes->buffer->data;
706 pkt->size = pes->data_index;
708 if (pes->total_size != MAX_PES_PAYLOAD &&
709 pes->pes_header_size + pes->data_index != pes->total_size +
711 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
712 pes->flags |= AV_PKT_FLAG_CORRUPT;
714 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
716 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
717 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
718 pkt->stream_index = pes->sub_st->index;
720 pkt->stream_index = pes->st->index;
723 /* store position of first TS packet of this PES packet */
724 pkt->pos = pes->ts_packet_pos;
725 pkt->flags = pes->flags;
727 /* reset pts values */
728 pes->pts = AV_NOPTS_VALUE;
729 pes->dts = AV_NOPTS_VALUE;
735 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
736 const uint8_t *buf, int buf_size)
739 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
740 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
741 int dts_flag = -1, cts_flag = -1;
742 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
743 init_get_bits(&gb, buf, buf_size * 8);
745 if (sl->use_au_start)
746 au_start_flag = get_bits1(&gb);
748 au_end_flag = get_bits1(&gb);
749 if (!sl->use_au_start && !sl->use_au_end)
750 au_start_flag = au_end_flag = 1;
752 ocr_flag = get_bits1(&gb);
754 idle_flag = get_bits1(&gb);
756 padding_flag = get_bits1(&gb);
758 padding_bits = get_bits(&gb, 3);
760 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
761 if (sl->packet_seq_num_len)
762 skip_bits_long(&gb, sl->packet_seq_num_len);
763 if (sl->degr_prior_len)
765 skip_bits(&gb, sl->degr_prior_len);
767 skip_bits_long(&gb, sl->ocr_len);
769 if (sl->use_rand_acc_pt)
771 if (sl->au_seq_num_len > 0)
772 skip_bits_long(&gb, sl->au_seq_num_len);
773 if (sl->use_timestamps) {
774 dts_flag = get_bits1(&gb);
775 cts_flag = get_bits1(&gb);
778 if (sl->inst_bitrate_len)
779 inst_bitrate_flag = get_bits1(&gb);
781 dts = get_bits64(&gb, sl->timestamp_len);
783 cts = get_bits64(&gb, sl->timestamp_len);
785 skip_bits_long(&gb, sl->au_len);
786 if (inst_bitrate_flag)
787 skip_bits_long(&gb, sl->inst_bitrate_len);
790 if (dts != AV_NOPTS_VALUE)
792 if (cts != AV_NOPTS_VALUE)
795 if (sl->timestamp_len && sl->timestamp_res)
796 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
798 return (get_bits_count(&gb) + 7) >> 3;
801 /* return non zero if a packet could be constructed */
802 static int mpegts_push_data(MpegTSFilter *filter,
803 const uint8_t *buf, int buf_size, int is_start,
806 PESContext *pes = filter->u.pes_filter.opaque;
807 MpegTSContext *ts = pes->ts;
815 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
816 new_pes_packet(pes, ts->pkt);
819 pes->state = MPEGTS_HEADER;
821 pes->ts_packet_pos = pos;
824 while (buf_size > 0) {
825 switch (pes->state) {
827 len = PES_START_SIZE - pes->data_index;
830 memcpy(pes->header + pes->data_index, p, len);
831 pes->data_index += len;
834 if (pes->data_index == PES_START_SIZE) {
835 /* we got all the PES or section header. We can now
837 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
838 pes->header[2] == 0x01) {
839 /* it must be an mpeg2 PES stream */
840 code = pes->header[3] | 0x100;
841 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
844 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
846 pes->sub_st->discard == AVDISCARD_ALL)) ||
847 code == 0x1be) /* padding_stream */
850 /* stream not present in PMT */
852 pes->st = avformat_new_stream(ts->stream, NULL);
854 return AVERROR(ENOMEM);
855 pes->st->id = pes->pid;
856 mpegts_set_stream_info(pes->st, pes, 0, 0);
859 pes->total_size = AV_RB16(pes->header + 4);
860 /* NOTE: a zero total size means the PES size is
862 if (!pes->total_size)
863 pes->total_size = MAX_PES_PAYLOAD;
865 /* allocate pes buffer */
866 pes->buffer = av_buffer_alloc(pes->total_size +
867 AV_INPUT_BUFFER_PADDING_SIZE);
869 return AVERROR(ENOMEM);
871 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
872 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
873 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
874 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
875 pes->state = MPEGTS_PESHEADER;
876 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE) {
877 av_log(pes->stream, AV_LOG_TRACE,
878 "pid=%x stream_type=%x probing\n",
881 pes->st->codec->codec_id = AV_CODEC_ID_PROBE;
884 pes->state = MPEGTS_PAYLOAD;
888 /* otherwise, it should be a table */
891 pes->state = MPEGTS_SKIP;
896 /**********************************************/
897 /* PES packing parsing */
898 case MPEGTS_PESHEADER:
899 len = PES_HEADER_SIZE - pes->data_index;
901 return AVERROR_INVALIDDATA;
904 memcpy(pes->header + pes->data_index, p, len);
905 pes->data_index += len;
908 if (pes->data_index == PES_HEADER_SIZE) {
909 pes->pes_header_size = pes->header[8] + 9;
910 pes->state = MPEGTS_PESHEADER_FILL;
913 case MPEGTS_PESHEADER_FILL:
914 len = pes->pes_header_size - pes->data_index;
916 return AVERROR_INVALIDDATA;
919 memcpy(pes->header + pes->data_index, p, len);
920 pes->data_index += len;
923 if (pes->data_index == pes->pes_header_size) {
925 unsigned int flags, pes_ext, skip;
927 flags = pes->header[7];
929 pes->pts = AV_NOPTS_VALUE;
930 pes->dts = AV_NOPTS_VALUE;
931 if ((flags & 0xc0) == 0x80) {
932 pes->dts = pes->pts = ff_parse_pes_pts(r);
934 } else if ((flags & 0xc0) == 0xc0) {
935 pes->pts = ff_parse_pes_pts(r);
937 pes->dts = ff_parse_pes_pts(r);
940 pes->extended_stream_id = -1;
941 if (flags & 0x01) { /* PES extension */
943 /* Skip PES private data, program packet sequence counter and P-STD buffer */
944 skip = (pes_ext >> 4) & 0xb;
947 if ((pes_ext & 0x41) == 0x01 &&
948 (r + 2) <= (pes->header + pes->pes_header_size)) {
949 /* PES extension 2 */
950 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
951 pes->extended_stream_id = r[1];
955 /* we got the full header. We parse it and get the payload */
956 pes->state = MPEGTS_PAYLOAD;
958 if (pes->stream_type == 0x12 && buf_size > 0) {
959 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
961 pes->pes_header_size += sl_header_bytes;
962 p += sl_header_bytes;
963 buf_size -= sl_header_bytes;
968 if (buf_size > 0 && pes->buffer) {
969 if (pes->data_index > 0 &&
970 pes->data_index + buf_size > pes->total_size) {
971 new_pes_packet(pes, ts->pkt);
972 pes->total_size = MAX_PES_PAYLOAD;
973 pes->buffer = av_buffer_alloc(pes->total_size +
974 AV_INPUT_BUFFER_PADDING_SIZE);
976 return AVERROR(ENOMEM);
978 } else if (pes->data_index == 0 &&
979 buf_size > pes->total_size) {
980 // pes packet size is < ts size packet and pes data is padded with 0xff
981 // not sure if this is legal in ts but see issue #2392
982 buf_size = pes->total_size;
984 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
985 pes->data_index += buf_size;
988 /* emit complete packets with known packet size
989 * decreases demuxer delay for infrequent packets like subtitles from
990 * a couple of seconds to milliseconds for properly muxed files.
991 * total_size is the number of bytes following pes_packet_length
992 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
993 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
994 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
996 new_pes_packet(pes, ts->pkt);
1008 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1013 /* if no pid found, then add a pid context */
1014 pes = av_mallocz(sizeof(PESContext));
1018 pes->stream = ts->stream;
1020 pes->pcr_pid = pcr_pid;
1021 pes->state = MPEGTS_SKIP;
1022 pes->pts = AV_NOPTS_VALUE;
1023 pes->dts = AV_NOPTS_VALUE;
1024 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1033 typedef struct MP4DescrParseContext {
1037 Mp4Descr *active_descr;
1039 int max_descr_count;
1041 } MP4DescrParseContext;
1043 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1044 const uint8_t *buf, unsigned size,
1045 Mp4Descr *descr, int max_descr_count)
1048 if (size > (1 << 30))
1049 return AVERROR_INVALIDDATA;
1051 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1052 NULL, NULL, NULL, NULL)) < 0)
1059 d->active_descr = NULL;
1060 d->max_descr_count = max_descr_count;
1065 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1067 int64_t new_off = avio_tell(pb);
1068 (*len) -= new_off - *off;
1072 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1075 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1078 int ret = parse_mp4_descr(d, off, len, 0);
1081 update_offsets(&d->pb, &off, &len);
1086 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1088 avio_rb16(&d->pb); // ID
1094 update_offsets(&d->pb, &off, &len);
1095 return parse_mp4_descr_arr(d, off, len);
1098 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1103 id_flags = avio_rb16(&d->pb);
1104 if (!(id_flags & 0x0020)) { // URL_Flag
1105 update_offsets(&d->pb, &off, &len);
1106 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1112 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1115 if (d->descr_count >= d->max_descr_count)
1116 return AVERROR_INVALIDDATA;
1117 ff_mp4_parse_es_descr(&d->pb, &es_id);
1118 d->active_descr = d->descr + (d->descr_count++);
1120 d->active_descr->es_id = es_id;
1121 update_offsets(&d->pb, &off, &len);
1122 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1123 update_offsets(&d->pb, &off, &len);
1125 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1126 d->active_descr = NULL;
1130 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1133 Mp4Descr *descr = d->active_descr;
1135 return AVERROR_INVALIDDATA;
1136 d->active_descr->dec_config_descr = av_malloc(len);
1137 if (!descr->dec_config_descr)
1138 return AVERROR(ENOMEM);
1139 descr->dec_config_descr_len = len;
1140 avio_read(&d->pb, descr->dec_config_descr, len);
1144 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1146 Mp4Descr *descr = d->active_descr;
1149 return AVERROR_INVALIDDATA;
1151 predefined = avio_r8(&d->pb);
1154 int flags = avio_r8(&d->pb);
1155 descr->sl.use_au_start = !!(flags & 0x80);
1156 descr->sl.use_au_end = !!(flags & 0x40);
1157 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1158 descr->sl.use_padding = !!(flags & 0x08);
1159 descr->sl.use_timestamps = !!(flags & 0x04);
1160 descr->sl.use_idle = !!(flags & 0x02);
1161 descr->sl.timestamp_res = avio_rb32(&d->pb);
1163 descr->sl.timestamp_len = avio_r8(&d->pb);
1164 descr->sl.ocr_len = avio_r8(&d->pb);
1165 descr->sl.au_len = avio_r8(&d->pb);
1166 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1167 lengths = avio_rb16(&d->pb);
1168 descr->sl.degr_prior_len = lengths >> 12;
1169 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1170 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1172 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1177 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1181 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1182 update_offsets(&d->pb, &off, &len);
1183 if (len < 0 || len1 > len || len1 <= 0) {
1184 av_log(d->s, AV_LOG_ERROR,
1185 "Tag %x length violation new length %d bytes remaining %d\n",
1187 return AVERROR_INVALIDDATA;
1190 if (d->level++ >= MAX_LEVEL) {
1191 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1195 if (target_tag && tag != target_tag) {
1196 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1203 parse_MP4IODescrTag(d, off, len1);
1206 parse_MP4ODescrTag(d, off, len1);
1209 parse_MP4ESDescrTag(d, off, len1);
1211 case MP4DecConfigDescrTag:
1212 parse_MP4DecConfigDescrTag(d, off, len1);
1215 parse_MP4SLDescrTag(d, off, len1);
1222 avio_seek(&d->pb, off + len1, SEEK_SET);
1226 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1227 Mp4Descr *descr, int *descr_count, int max_descr_count)
1229 MP4DescrParseContext d;
1232 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1236 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1238 *descr_count = d.descr_count;
1242 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1243 Mp4Descr *descr, int *descr_count, int max_descr_count)
1245 MP4DescrParseContext d;
1248 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1252 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1254 *descr_count = d.descr_count;
1258 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1261 MpegTSContext *ts = filter->u.section_filter.opaque;
1262 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1264 const uint8_t *p, *p_end;
1266 int mp4_descr_count = 0;
1267 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1269 AVFormatContext *s = ts->stream;
1271 p_end = section + section_len - 4;
1273 if (parse_section_header(&h, &p, p_end) < 0)
1275 if (h.tid != M4OD_TID)
1277 if (h.version == tssf->last_ver)
1279 tssf->last_ver = h.version;
1281 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1282 MAX_MP4_DESCR_COUNT);
1284 for (pid = 0; pid < NB_PID_MAX; pid++) {
1287 for (i = 0; i < mp4_descr_count; i++) {
1290 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1292 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
1293 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1296 pes = ts->pids[pid]->u.pes_filter.opaque;
1301 pes->sl = mp4_descr[i].sl;
1303 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1304 mp4_descr[i].dec_config_descr_len, 0,
1305 NULL, NULL, NULL, NULL);
1306 ff_mp4_read_dec_config_descr(s, st, &pb);
1307 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1308 st->codec->extradata_size > 0)
1309 st->need_parsing = 0;
1310 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1311 st->codec->extradata_size > 0)
1312 st->need_parsing = 0;
1314 st->codec->codec_type = avcodec_get_type(st->codec->codec_id);
1317 for (i = 0; i < mp4_descr_count; i++)
1318 av_free(mp4_descr[i].dec_config_descr);
1321 static const uint8_t opus_coupled_stream_cnt[9] = {
1322 1, 0, 1, 1, 2, 2, 2, 3, 3
1325 static const uint8_t opus_stream_cnt[9] = {
1326 1, 1, 1, 2, 2, 3, 4, 4, 5,
1329 static const uint8_t opus_channel_map[8][8] = {
1337 { 0,6,1,2,3,4,5,7 },
1340 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1341 const uint8_t **pp, const uint8_t *desc_list_end,
1342 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1345 const uint8_t *desc_end;
1346 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1350 desc_tag = get8(pp, desc_list_end);
1352 return AVERROR_INVALIDDATA;
1353 desc_len = get8(pp, desc_list_end);
1355 return AVERROR_INVALIDDATA;
1356 desc_end = *pp + desc_len;
1357 if (desc_end > desc_list_end)
1358 return AVERROR_INVALIDDATA;
1360 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1362 if (st->codec->codec_id == AV_CODEC_ID_NONE &&
1363 stream_type == STREAM_TYPE_PRIVATE_DATA)
1364 mpegts_find_stream_type(st, desc_tag, DESC_types);
1367 case 0x1E: /* SL descriptor */
1368 desc_es_id = get16(pp, desc_end);
1371 if (ts && ts->pids[pid])
1372 ts->pids[pid]->es_id = desc_es_id;
1373 for (i = 0; i < mp4_descr_count; i++)
1374 if (mp4_descr[i].dec_config_descr_len &&
1375 mp4_descr[i].es_id == desc_es_id) {
1377 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1378 mp4_descr[i].dec_config_descr_len, 0,
1379 NULL, NULL, NULL, NULL);
1380 ff_mp4_read_dec_config_descr(fc, st, &pb);
1381 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1382 st->codec->extradata_size > 0)
1383 st->need_parsing = 0;
1384 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1385 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1388 case 0x1F: /* FMC descriptor */
1389 if (get16(pp, desc_end) < 0)
1391 if (mp4_descr_count > 0 &&
1392 st->codec->codec_id == AV_CODEC_ID_AAC_LATM &&
1393 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1395 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1396 mp4_descr->dec_config_descr_len, 0,
1397 NULL, NULL, NULL, NULL);
1398 ff_mp4_read_dec_config_descr(fc, st, &pb);
1399 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1400 st->codec->extradata_size > 0)
1401 st->need_parsing = 0;
1404 case 0x56: /* DVB teletext descriptor */
1405 language[0] = get8(pp, desc_end);
1406 language[1] = get8(pp, desc_end);
1407 language[2] = get8(pp, desc_end);
1409 av_dict_set(&st->metadata, "language", language, 0);
1411 case 0x59: /* subtitling descriptor */
1412 language[0] = get8(pp, desc_end);
1413 language[1] = get8(pp, desc_end);
1414 language[2] = get8(pp, desc_end);
1416 /* hearing impaired subtitles detection */
1417 switch (get8(pp, desc_end)) {
1418 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1419 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1420 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1421 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1422 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1423 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1424 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1427 if (st->codec->extradata) {
1428 if (st->codec->extradata_size == 4 &&
1429 memcmp(st->codec->extradata, *pp, 4))
1430 avpriv_request_sample(fc, "DVB sub with multiple IDs");
1432 st->codec->extradata = av_malloc(4 + AV_INPUT_BUFFER_PADDING_SIZE);
1433 if (st->codec->extradata) {
1434 st->codec->extradata_size = 4;
1435 memcpy(st->codec->extradata, *pp, 4);
1439 av_dict_set(&st->metadata, "language", language, 0);
1441 case 0x0a: /* ISO 639 language descriptor */
1442 for (i = 0; i + 4 <= desc_len; i += 4) {
1443 language[i + 0] = get8(pp, desc_end);
1444 language[i + 1] = get8(pp, desc_end);
1445 language[i + 2] = get8(pp, desc_end);
1446 language[i + 3] = ',';
1447 switch (get8(pp, desc_end)) {
1449 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1452 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1455 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1459 if (i && language[0]) {
1460 language[i - 1] = 0;
1461 av_dict_set(&st->metadata, "language", language, 0);
1464 case 0x05: /* registration descriptor */
1465 st->codec->codec_tag = bytestream_get_le32(pp);
1466 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1467 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1468 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1470 case 0x7f: /* DVB extension descriptor */
1471 ext_desc_tag = get8(pp, desc_end);
1472 if (ext_desc_tag < 0)
1473 return AVERROR_INVALIDDATA;
1474 if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1475 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1476 if (!st->codec->extradata) {
1477 st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) +
1478 AV_INPUT_BUFFER_PADDING_SIZE);
1479 if (!st->codec->extradata)
1480 return AVERROR(ENOMEM);
1482 st->codec->extradata_size = sizeof(opus_default_extradata);
1483 memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1485 channel_config_code = get8(pp, desc_end);
1486 if (channel_config_code < 0)
1487 return AVERROR_INVALIDDATA;
1488 if (channel_config_code <= 0x8) {
1489 st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1490 st->codec->extradata[18] = channel_config_code ? (channels > 2) : 255;
1491 st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
1492 st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1493 memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1495 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1497 st->need_parsing = AVSTREAM_PARSE_FULL;
1508 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1510 MpegTSContext *ts = filter->u.section_filter.opaque;
1511 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1512 SectionHeader h1, *h = &h1;
1515 const uint8_t *p, *p_end, *desc_list_end;
1516 int program_info_length, pcr_pid, pid, stream_type;
1518 uint32_t prog_reg_desc = 0; /* registration descriptor */
1520 int mp4_descr_count = 0;
1521 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1524 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1525 hex_dump_debug(ts->stream, section, section_len);
1527 p_end = section + section_len - 4;
1529 if (parse_section_header(h, &p, p_end) < 0)
1531 if (h->version == tssf->last_ver)
1533 tssf->last_ver = h->version;
1535 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d\n",
1536 h->id, h->sec_num, h->last_sec_num);
1538 if (h->tid != PMT_TID)
1541 clear_program(ts, h->id);
1542 pcr_pid = get16(&p, p_end);
1546 add_pid_to_pmt(ts, h->id, pcr_pid);
1548 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1550 program_info_length = get16(&p, p_end);
1551 if (program_info_length < 0)
1553 program_info_length &= 0xfff;
1554 while (program_info_length >= 2) {
1556 tag = get8(&p, p_end);
1557 len = get8(&p, p_end);
1559 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1561 if (len > program_info_length - 2)
1562 // something else is broken, exit the program_descriptors_loop
1564 program_info_length -= len + 2;
1565 if (tag == 0x1d) { // IOD descriptor
1566 get8(&p, p_end); // scope
1567 get8(&p, p_end); // label
1569 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1570 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1571 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1572 prog_reg_desc = bytestream_get_le32(&p);
1577 p += program_info_length;
1581 // stop parsing after pmt, we found header
1582 if (!ts->stream->nb_streams)
1589 stream_type = get8(&p, p_end);
1590 if (stream_type < 0)
1592 pid = get16(&p, p_end);
1597 /* now create stream */
1598 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1599 pes = ts->pids[pid]->u.pes_filter.opaque;
1601 pes->st = avformat_new_stream(pes->stream, NULL);
1602 pes->st->id = pes->pid;
1605 } else if (stream_type != 0x13) {
1607 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1608 pes = add_pes_stream(ts, pid, pcr_pid);
1610 st = avformat_new_stream(pes->stream, NULL);
1614 int idx = ff_find_stream_index(ts->stream, pid);
1616 st = ts->stream->streams[idx];
1618 st = avformat_new_stream(ts->stream, NULL);
1620 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1627 if (pes && !pes->stream_type)
1628 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1630 add_pid_to_pmt(ts, h->id, pid);
1632 ff_program_add_stream_index(ts->stream, h->id, st->index);
1634 desc_list_len = get16(&p, p_end);
1635 if (desc_list_len < 0)
1637 desc_list_len &= 0xfff;
1638 desc_list_end = p + desc_list_len;
1639 if (desc_list_end > p_end)
1642 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1643 desc_list_end, mp4_descr,
1644 mp4_descr_count, pid, ts) < 0)
1647 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1648 stream_type == 0x83 && pes->sub_st) {
1649 ff_program_add_stream_index(ts->stream, h->id,
1650 pes->sub_st->index);
1651 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1658 for (i = 0; i < mp4_descr_count; i++)
1659 av_free(mp4_descr[i].dec_config_descr);
1662 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1664 MpegTSContext *ts = filter->u.section_filter.opaque;
1665 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1666 SectionHeader h1, *h = &h1;
1667 const uint8_t *p, *p_end;
1670 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
1671 hex_dump_debug(ts->stream, section, section_len);
1673 p_end = section + section_len - 4;
1675 if (parse_section_header(h, &p, p_end) < 0)
1677 if (h->tid != PAT_TID)
1679 if (h->version == tssf->last_ver)
1681 tssf->last_ver = h->version;
1685 sid = get16(&p, p_end);
1688 pmt_pid = get16(&p, p_end);
1693 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1695 if (sid == 0x0000) {
1698 av_new_program(ts->stream, sid);
1699 if (ts->pids[pmt_pid])
1700 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1701 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1702 add_pat_entry(ts, sid);
1703 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
1704 add_pid_to_pmt(ts, sid, pmt_pid);
1709 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1711 MpegTSContext *ts = filter->u.section_filter.opaque;
1712 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1713 SectionHeader h1, *h = &h1;
1714 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1715 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1716 char *name, *provider_name;
1718 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
1719 hex_dump_debug(ts->stream, section, section_len);
1721 p_end = section + section_len - 4;
1723 if (parse_section_header(h, &p, p_end) < 0)
1725 if (h->tid != SDT_TID)
1727 if (h->version == tssf->last_ver)
1729 tssf->last_ver = h->version;
1731 onid = get16(&p, p_end);
1734 val = get8(&p, p_end);
1738 sid = get16(&p, p_end);
1741 val = get8(&p, p_end);
1744 desc_list_len = get16(&p, p_end);
1745 if (desc_list_len < 0)
1747 desc_list_len &= 0xfff;
1748 desc_list_end = p + desc_list_len;
1749 if (desc_list_end > p_end)
1752 desc_tag = get8(&p, desc_list_end);
1755 desc_len = get8(&p, desc_list_end);
1756 desc_end = p + desc_len;
1757 if (desc_end > desc_list_end)
1760 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
1761 desc_tag, desc_len);
1765 service_type = get8(&p, p_end);
1766 if (service_type < 0)
1768 provider_name = getstr8(&p, p_end);
1771 name = getstr8(&p, p_end);
1773 AVProgram *program = av_new_program(ts->stream, sid);
1775 av_dict_set(&program->metadata, "service_name", name, 0);
1776 av_dict_set(&program->metadata, "service_provider",
1781 av_free(provider_name);
1792 /* handle one TS packet */
1793 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1796 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
1797 has_adaptation, has_payload;
1798 const uint8_t *p, *p_end;
1801 pid = AV_RB16(packet + 1) & 0x1fff;
1802 if (pid && discard_pid(ts, pid))
1804 is_start = packet[1] & 0x40;
1805 tss = ts->pids[pid];
1806 if (ts->auto_guess && !tss && is_start) {
1807 add_pes_stream(ts, pid, -1);
1808 tss = ts->pids[pid];
1813 afc = (packet[3] >> 4) & 3;
1814 if (afc == 0) /* reserved value */
1816 has_adaptation = afc & 2;
1817 has_payload = afc & 1;
1818 is_discontinuity = has_adaptation &&
1819 packet[4] != 0 && /* with length > 0 */
1820 (packet[5] & 0x80); /* and discontinuity indicated */
1822 /* continuity check (currently not used) */
1823 cc = (packet[3] & 0xf);
1824 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
1825 cc_ok = pid == 0x1FFF || // null packet PID
1832 av_log(ts->stream, AV_LOG_WARNING,
1833 "Continuity check failed for pid %d expected %d got %d\n",
1834 pid, expected_cc, cc);
1835 if (tss->type == MPEGTS_PES) {
1836 PESContext *pc = tss->u.pes_filter.opaque;
1837 pc->flags |= AV_PKT_FLAG_CORRUPT;
1844 if (has_adaptation) {
1845 /* skip adaptation field */
1848 /* if past the end of packet, ignore */
1849 p_end = packet + TS_PACKET_SIZE;
1853 pos = avio_tell(ts->stream->pb);
1854 MOD_UNLIKELY(ts->pos47, pos, ts->raw_packet_size, ts->pos);
1856 if (tss->type == MPEGTS_SECTION) {
1858 /* pointer field present */
1860 if (p + len > p_end)
1863 /* write remaining section bytes */
1864 write_section_data(ts, tss,
1866 /* check whether filter has been closed */
1872 write_section_data(ts, tss,
1877 write_section_data(ts, tss,
1883 // Note: The position here points actually behind the current packet.
1884 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1885 pos - ts->raw_packet_size)) < 0)
1892 /* XXX: try to find a better synchro over several packets (use
1893 * get_packet_size() ?) */
1894 static int mpegts_resync(AVFormatContext *s)
1896 MpegTSContext *ts = s->priv_data;
1897 AVIOContext *pb = s->pb;
1900 for (i = 0; i < ts->resync_size; i++) {
1902 if (pb->eof_reached)
1905 avio_seek(pb, -1, SEEK_CUR);
1909 av_log(s, AV_LOG_ERROR,
1910 "max resync size reached, could not find sync byte\n");
1912 return AVERROR_INVALIDDATA;
1915 /* return AVERROR_something if error or EOF. Return 0 if OK. */
1916 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
1917 const uint8_t **data)
1919 AVIOContext *pb = s->pb;
1923 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
1924 if (len != TS_PACKET_SIZE)
1925 return len < 0 ? len : AVERROR_EOF;
1926 /* check packet sync byte */
1927 if ((*data)[0] != 0x47) {
1928 /* find a new packet start */
1929 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1930 if (mpegts_resync(s) < 0)
1931 return AVERROR(EAGAIN);
1941 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
1943 AVIOContext *pb = s->pb;
1944 int skip = raw_packet_size - TS_PACKET_SIZE;
1946 avio_skip(pb, skip);
1949 static int handle_packets(MpegTSContext *ts, int nb_packets)
1951 AVFormatContext *s = ts->stream;
1952 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
1953 const uint8_t *data;
1954 int packet_num, ret = 0;
1956 if (avio_tell(s->pb) != ts->last_pos) {
1958 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
1959 /* seek detected, flush pes buffer */
1960 for (i = 0; i < NB_PID_MAX; i++) {
1962 if (ts->pids[i]->type == MPEGTS_PES) {
1963 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1964 av_buffer_unref(&pes->buffer);
1965 pes->data_index = 0;
1966 pes->state = MPEGTS_SKIP; /* skip until pes header */
1968 ts->pids[i]->last_cc = -1;
1975 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1977 if (ts->stop_parse > 0)
1980 if (nb_packets != 0 && packet_num >= nb_packets)
1982 ret = read_packet(s, packet, ts->raw_packet_size, &data);
1985 ret = handle_packet(ts, data);
1986 finished_reading_packet(s, ts->raw_packet_size);
1990 ts->last_pos = avio_tell(s->pb);
1994 static int mpegts_probe(AVProbeData *p)
1996 const int size = p->buf_size;
1997 int score, fec_score, dvhs_score;
1998 int check_count = size / TS_FEC_PACKET_SIZE;
1999 #define CHECK_COUNT 10
2001 if (check_count < CHECK_COUNT)
2002 return AVERROR_INVALIDDATA;
2004 score = analyze(p->buf, TS_PACKET_SIZE * check_count,
2005 TS_PACKET_SIZE, NULL, 1) * CHECK_COUNT / check_count;
2006 dvhs_score = analyze(p->buf, TS_DVHS_PACKET_SIZE * check_count,
2007 TS_DVHS_PACKET_SIZE, NULL, 1) * CHECK_COUNT / check_count;
2008 fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE * check_count,
2009 TS_FEC_PACKET_SIZE, NULL, 1) * CHECK_COUNT / check_count;
2010 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
2011 score, dvhs_score, fec_score);
2013 /* we need a clear definition for the returned score otherwise
2014 * things will become messy sooner or later */
2015 if (score > fec_score && score > dvhs_score && score > 6)
2016 return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
2017 else if (dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6)
2018 return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT;
2019 else if (fec_score > 6)
2020 return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT;
2022 return AVERROR_INVALIDDATA;
2025 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2026 * (-1) if not available */
2027 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2029 int afc, len, flags;
2033 afc = (packet[3] >> 4) & 3;
2035 return AVERROR_INVALIDDATA;
2040 return AVERROR_INVALIDDATA;
2043 if (!(flags & 0x10))
2044 return AVERROR_INVALIDDATA;
2046 return AVERROR_INVALIDDATA;
2048 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2049 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2053 static int mpegts_read_header(AVFormatContext *s)
2055 MpegTSContext *ts = s->priv_data;
2056 AVIOContext *pb = s->pb;
2057 uint8_t buf[5 * 1024];
2061 /* read the first 1024 bytes to get packet size */
2062 pos = avio_tell(pb);
2063 len = avio_read(pb, buf, sizeof(buf));
2066 if (len != sizeof(buf))
2068 ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
2069 if (ts->raw_packet_size <= 0)
2070 return AVERROR_INVALIDDATA;
2074 if (s->iformat == &ff_mpegts_demuxer) {
2077 /* first do a scan to get all the services */
2078 if (avio_seek(pb, pos, SEEK_SET) < 0 && pb->seekable)
2079 av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
2081 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2083 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2085 handle_packets(ts, s->probesize / ts->raw_packet_size);
2086 /* if could not find service, enable auto_guess */
2090 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2092 s->ctx_flags |= AVFMTCTX_NOHEADER;
2095 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2096 int64_t pcrs[2], pcr_h;
2097 int packet_count[2];
2098 uint8_t packet[TS_PACKET_SIZE];
2099 const uint8_t *data;
2101 /* only read packets */
2103 st = avformat_new_stream(s, NULL);
2105 return AVERROR(ENOMEM);
2106 avpriv_set_pts_info(st, 60, 1, 27000000);
2107 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2108 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2110 /* we iterate until we find two PCRs to estimate the bitrate */
2115 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2118 pid = AV_RB16(data + 1) & 0x1fff;
2119 if ((pcr_pid == -1 || pcr_pid == pid) &&
2120 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2121 finished_reading_packet(s, ts->raw_packet_size);
2123 packet_count[nb_pcrs] = nb_packets;
2124 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2129 finished_reading_packet(s, ts->raw_packet_size);
2134 /* NOTE1: the bitrate is computed without the FEC */
2135 /* NOTE2: it is only the bitrate of the start of the stream */
2136 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2137 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2138 s->bit_rate = TS_PACKET_SIZE * 8 * 27e6 / ts->pcr_incr;
2139 st->codec->bit_rate = s->bit_rate;
2140 st->start_time = ts->cur_pcr;
2141 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2142 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2145 avio_seek(pb, pos, SEEK_SET);
2149 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2151 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2153 MpegTSContext *ts = s->priv_data;
2155 int64_t pcr_h, next_pcr_h, pos;
2156 int pcr_l, next_pcr_l;
2157 uint8_t pcr_buf[12];
2158 const uint8_t *data;
2160 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2161 return AVERROR(ENOMEM);
2162 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2163 pkt->pos = avio_tell(s->pb);
2165 av_packet_unref(pkt);
2168 if (data != pkt->data)
2169 memcpy(pkt->data, data, ts->raw_packet_size);
2170 finished_reading_packet(s, ts->raw_packet_size);
2171 if (ts->mpeg2ts_compute_pcr) {
2172 /* compute exact PCR for each packet */
2173 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2174 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2175 pos = avio_tell(s->pb);
2176 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2177 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2178 avio_read(s->pb, pcr_buf, 12);
2179 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2180 /* XXX: not precise enough */
2182 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2187 avio_seek(s->pb, pos, SEEK_SET);
2188 /* no next PCR found: we use previous increment */
2189 ts->cur_pcr = pcr_h * 300 + pcr_l;
2191 pkt->pts = ts->cur_pcr;
2192 pkt->duration = ts->pcr_incr;
2193 ts->cur_pcr += ts->pcr_incr;
2195 pkt->stream_index = 0;
2199 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2201 MpegTSContext *ts = s->priv_data;
2206 ret = handle_packets(ts, 0);
2208 /* flush pes data left */
2209 for (i = 0; i < NB_PID_MAX; i++)
2210 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2211 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2212 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2213 new_pes_packet(pes, pkt);
2214 pes->state = MPEGTS_SKIP;
2221 if (!ret && pkt->size < 0)
2222 ret = AVERROR(EINTR);
2226 static void mpegts_free(MpegTSContext *ts)
2232 for (i = 0; i < NB_PID_MAX; i++)
2234 mpegts_close_filter(ts, ts->pids[i]);
2237 static int mpegts_read_close(AVFormatContext *s)
2239 MpegTSContext *ts = s->priv_data;
2244 static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2245 int64_t *ppos, int64_t pos_limit)
2247 MpegTSContext *ts = s->priv_data;
2248 int64_t pos, timestamp;
2249 uint8_t buf[TS_PACKET_SIZE];
2250 int pcr_l, pcr_pid =
2251 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2252 const int find_next = 1;
2254 ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) *
2255 ts->raw_packet_size + ts->pos47;
2258 avio_seek(s->pb, pos, SEEK_SET);
2259 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2260 return AV_NOPTS_VALUE;
2261 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2262 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2265 pos += ts->raw_packet_size;
2269 pos -= ts->raw_packet_size;
2271 return AV_NOPTS_VALUE;
2272 avio_seek(s->pb, pos, SEEK_SET);
2273 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2274 return AV_NOPTS_VALUE;
2275 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2276 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2286 static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
2288 MpegTSContext *ts = s->priv_data;
2289 uint8_t buf[TS_PACKET_SIZE];
2293 ret = ff_seek_frame_binary(s, stream_index, target_ts, flags);
2297 pos = avio_tell(s->pb);
2300 avio_seek(s->pb, pos, SEEK_SET);
2301 ret = avio_read(s->pb, buf, TS_PACKET_SIZE);
2304 if (ret != TS_PACKET_SIZE)
2306 // pid = AV_RB16(buf + 1) & 0x1fff;
2309 pos += ts->raw_packet_size;
2311 avio_seek(s->pb, pos, SEEK_SET);
2316 /**************************************************************/
2317 /* parsing functions - called from other demuxers such as RTP */
2319 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
2323 ts = av_mallocz(sizeof(MpegTSContext));
2326 /* no stream case, currently used by RTP */
2327 ts->raw_packet_size = TS_PACKET_SIZE;
2333 /* return the consumed length if a packet was output, or -1 if no
2334 * packet is output */
2335 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2336 const uint8_t *buf, int len)
2344 if (ts->stop_parse > 0)
2346 if (len < TS_PACKET_SIZE)
2347 return AVERROR_INVALIDDATA;
2348 if (buf[0] != 0x47) {
2352 handle_packet(ts, buf);
2353 buf += TS_PACKET_SIZE;
2354 len -= TS_PACKET_SIZE;
2360 void ff_mpegts_parse_close(MpegTSContext *ts)
2366 AVInputFormat ff_mpegts_demuxer = {
2368 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2369 .priv_data_size = sizeof(MpegTSContext),
2370 .read_probe = mpegts_probe,
2371 .read_header = mpegts_read_header,
2372 .read_packet = mpegts_read_packet,
2373 .read_close = mpegts_read_close,
2374 .read_seek = read_seek,
2375 .read_timestamp = mpegts_get_pcr,
2376 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2377 .priv_class = &mpegts_class,
2380 AVInputFormat ff_mpegtsraw_demuxer = {
2381 .name = "mpegtsraw",
2382 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2383 .priv_data_size = sizeof(MpegTSContext),
2384 .read_header = mpegts_read_header,
2385 .read_packet = mpegts_raw_read_packet,
2386 .read_close = mpegts_read_close,
2387 .read_seek = read_seek,
2388 .read_timestamp = mpegts_get_pcr,
2389 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2390 .priv_class = &mpegtsraw_class,