2 * MPEG-2 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/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/get_bits.h"
33 #include "libavcodec/opus.h"
37 #include "avio_internal.h"
41 /* maximum size in which we look for synchronization if
42 * synchronization is lost */
43 #define MAX_RESYNC_SIZE 65536
45 #define MAX_PES_PAYLOAD 200 * 1024
47 #define MAX_MP4_DESCR_COUNT 16
49 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
51 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52 (modulus) = (dividend) % (divisor); \
53 (prev_dividend) = (dividend); \
56 enum MpegTSFilterType {
62 typedef struct MpegTSFilter MpegTSFilter;
64 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65 int is_start, int64_t pos);
67 typedef struct MpegTSPESFilter {
72 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
74 typedef void SetServiceCallback (void *opaque, int ret);
76 typedef struct MpegTSSectionFilter {
83 unsigned int check_crc : 1;
84 unsigned int end_of_section_reached : 1;
85 SectionCallback *section_cb;
87 } MpegTSSectionFilter;
92 int last_cc; /* last cc code (-1 if first packet) */
94 enum MpegTSFilterType type;
96 MpegTSPESFilter pes_filter;
97 MpegTSSectionFilter section_filter;
101 #define MAX_PIDS_PER_PROGRAM 64
103 unsigned int id; // program id/service id
104 unsigned int nb_pids;
105 unsigned int pids[MAX_PIDS_PER_PROGRAM];
107 /** have we found pmt for this program */
111 struct MpegTSContext {
112 const AVClass *class;
114 AVFormatContext *stream;
115 /** raw packet size, including FEC if present */
120 #define SIZE_STAT_THRESHOLD 10
124 /** if true, all pids are analyzed to find streams */
127 /** compute exact PCR for each transport stream packet */
128 int mpeg2ts_compute_pcr;
130 /** fix dvb teletext pts */
131 int fix_teletext_pts;
133 int64_t cur_pcr; /**< used to estimate the exact PCR */
134 int pcr_incr; /**< used to estimate the exact PCR */
136 /* data needed to handle file based ts */
137 /** stop parsing loop */
139 /** packet containing Audio/Video data */
141 /** to detect seek */
146 int skip_unknown_pmt;
151 int merge_pmt_versions;
153 /******************************************/
154 /* private mpegts data */
156 /** structure to keep track of Program->pids mapping */
160 int8_t crc_validity[NB_PID_MAX];
161 /** filters for various streams specified by PMT + for the PAT and PMT */
162 MpegTSFilter *pids[NB_PID_MAX];
166 #define MPEGTS_OPTIONS \
167 { "resync_size", "set size limit for looking up a new synchronization", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
169 static const AVOption options[] = {
171 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
172 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
173 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
174 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
175 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
176 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
177 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
178 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
179 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
180 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
181 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
182 {.i64 = 0}, 0, 1, 0 },
183 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
184 {.i64 = 0}, 0, 1, 0 },
188 static const AVClass mpegts_class = {
189 .class_name = "mpegts demuxer",
190 .item_name = av_default_item_name,
192 .version = LIBAVUTIL_VERSION_INT,
195 static const AVOption raw_options[] = {
197 { "compute_pcr", "compute exact PCR for each transport stream packet",
198 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
199 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
200 { "ts_packetsize", "output option carrying the raw packet size",
201 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
203 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
207 static const AVClass mpegtsraw_class = {
208 .class_name = "mpegtsraw demuxer",
209 .item_name = av_default_item_name,
210 .option = raw_options,
211 .version = LIBAVUTIL_VERSION_INT,
214 /* TS stream handling */
219 MPEGTS_PESHEADER_FILL,
224 /* enough for PES header + length */
225 #define PES_START_SIZE 6
226 #define PES_HEADER_SIZE 9
227 #define MAX_PES_HEADER_SIZE (9 + 255)
229 typedef struct PESContext {
231 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
234 AVFormatContext *stream;
236 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
237 enum MpegTSState state;
238 /* used to get the format */
240 int flags; /**< copied to the AVPacket flags */
243 int extended_stream_id;
246 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
247 uint8_t header[MAX_PES_HEADER_SIZE];
252 extern AVInputFormat ff_mpegts_demuxer;
254 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
257 for (i = 0; i < ts->nb_prg; i++) {
258 if (ts->prg[i].id == programid) {
265 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
267 AVProgram *prg = NULL;
270 for (i = 0; i < ts->stream->nb_programs; i++)
271 if (ts->stream->programs[i]->id == programid) {
272 prg = ts->stream->programs[i];
277 prg->nb_stream_indexes = 0;
280 static void clear_program(MpegTSContext *ts, unsigned int programid)
284 clear_avprogram(ts, programid);
285 for (i = 0; i < ts->nb_prg; i++)
286 if (ts->prg[i].id == programid) {
287 ts->prg[i].nb_pids = 0;
288 ts->prg[i].pmt_found = 0;
292 static void clear_programs(MpegTSContext *ts)
298 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
301 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
305 p = &ts->prg[ts->nb_prg];
312 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
315 struct Program *p = get_program(ts, programid);
320 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
323 for (i = 0; i < p->nb_pids; i++)
324 if (p->pids[i] == pid)
327 p->pids[p->nb_pids++] = pid;
330 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
332 struct Program *p = get_program(ts, programid);
339 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
340 unsigned int pid, int version)
343 for (i = 0; i < s->nb_programs; i++) {
344 AVProgram *program = s->programs[i];
345 if (program->id == programid) {
346 int old_pcr_pid = program->pcr_pid,
347 old_version = program->pmt_version;
348 program->pcr_pid = pid;
349 program->pmt_version = version;
351 if (old_version != -1 && old_version != version) {
352 av_log(s, AV_LOG_VERBOSE,
353 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
354 programid, old_version, version, old_pcr_pid, pid);
362 * @brief discard_pid() decides if the pid is to be discarded according
363 * to caller's programs selection
364 * @param ts : - TS context
366 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
369 static int discard_pid(MpegTSContext *ts, unsigned int pid)
372 int used = 0, discarded = 0;
375 /* If none of the programs have .discard=AVDISCARD_ALL then there's
376 * no way we have to discard this packet */
377 for (k = 0; k < ts->stream->nb_programs; k++)
378 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
380 if (k == ts->stream->nb_programs)
383 for (i = 0; i < ts->nb_prg; i++) {
385 for (j = 0; j < p->nb_pids; j++) {
386 if (p->pids[j] != pid)
388 // is program with id p->id set to be discarded?
389 for (k = 0; k < ts->stream->nb_programs; k++) {
390 if (ts->stream->programs[k]->id == p->id) {
391 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
400 return !used && discarded;
404 * Assemble PES packets out of TS packets, and then call the "section_cb"
405 * function when they are complete.
407 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
408 const uint8_t *buf, int buf_size, int is_start)
410 MpegTSSectionFilter *tss = &tss1->u.section_filter;
411 uint8_t *cur_section_buf = NULL;
415 memcpy(tss->section_buf, buf, buf_size);
416 tss->section_index = buf_size;
417 tss->section_h_size = -1;
418 tss->end_of_section_reached = 0;
420 if (tss->end_of_section_reached)
422 len = MAX_SECTION_SIZE - tss->section_index;
425 memcpy(tss->section_buf + tss->section_index, buf, len);
426 tss->section_index += len;
430 cur_section_buf = tss->section_buf;
431 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
432 /* compute section length if possible */
433 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
434 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
435 if (len > MAX_SECTION_SIZE)
437 tss->section_h_size = len;
440 if (tss->section_h_size != -1 &&
441 tss->section_index >= offset + tss->section_h_size) {
443 tss->end_of_section_reached = 1;
445 if (tss->check_crc) {
446 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
447 if (tss->section_h_size >= 4)
448 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
451 ts->crc_validity[ tss1->pid ] = 100;
452 }else if (ts->crc_validity[ tss1->pid ] > -10) {
453 ts->crc_validity[ tss1->pid ]--;
458 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
463 cur_section_buf += tss->section_h_size;
464 offset += tss->section_h_size;
465 tss->section_h_size = -1;
467 tss->end_of_section_reached = 0;
473 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
474 enum MpegTSFilterType type)
476 MpegTSFilter *filter;
478 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
480 if (pid >= NB_PID_MAX || ts->pids[pid])
482 filter = av_mallocz(sizeof(MpegTSFilter));
485 ts->pids[pid] = filter;
490 filter->last_cc = -1;
491 filter->last_pcr= -1;
496 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
498 SectionCallback *section_cb,
502 MpegTSFilter *filter;
503 MpegTSSectionFilter *sec;
505 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
507 sec = &filter->u.section_filter;
508 sec->section_cb = section_cb;
509 sec->opaque = opaque;
510 sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
511 sec->check_crc = check_crc;
514 if (!sec->section_buf) {
521 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
525 MpegTSFilter *filter;
526 MpegTSPESFilter *pes;
528 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
531 pes = &filter->u.pes_filter;
532 pes->pes_cb = pes_cb;
533 pes->opaque = opaque;
537 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
539 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
542 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
547 if (filter->type == MPEGTS_SECTION)
548 av_freep(&filter->u.section_filter.section_buf);
549 else if (filter->type == MPEGTS_PES) {
550 PESContext *pes = filter->u.pes_filter.opaque;
551 av_buffer_unref(&pes->buffer);
552 /* referenced private data will be freed later in
553 * avformat_close_input */
554 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
555 av_freep(&filter->u.pes_filter.opaque);
560 ts->pids[pid] = NULL;
563 static int analyze(const uint8_t *buf, int size, int packet_size,
566 int stat[TS_MAX_PACKET_SIZE];
571 memset(stat, 0, packet_size * sizeof(*stat));
573 for (i = 0; i < size - 3; i++) {
574 if (buf[i] == 0x47) {
575 int pid = AV_RB16(buf+1) & 0x1FFF;
576 int asc = buf[i + 3] & 0x30;
577 if (!probe || pid == 0x1FFF || asc) {
578 int x = i % packet_size;
581 if (stat[x] > best_score) {
582 best_score = stat[x];
588 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
591 /* autodetect fec presence. Must have at least 1024 bytes */
592 static int get_packet_size(const uint8_t *buf, int size)
594 int score, fec_score, dvhs_score;
596 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
597 return AVERROR_INVALIDDATA;
599 score = analyze(buf, size, TS_PACKET_SIZE, 0);
600 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
601 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
602 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
603 score, dvhs_score, fec_score);
605 if (score > fec_score && score > dvhs_score)
606 return TS_PACKET_SIZE;
607 else if (dvhs_score > score && dvhs_score > fec_score)
608 return TS_DVHS_PACKET_SIZE;
609 else if (score < fec_score && dvhs_score < fec_score)
610 return TS_FEC_PACKET_SIZE;
612 return AVERROR_INVALIDDATA;
615 typedef struct SectionHeader {
620 uint8_t last_sec_num;
623 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
625 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
628 tssf->last_ver = h->version;
629 tssf->last_crc = tssf->crc;
634 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
641 return AVERROR_INVALIDDATA;
647 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
654 return AVERROR_INVALIDDATA;
661 /* read and allocate a DVB string preceded by its length */
662 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
669 len = get8(&p, p_end);
674 str = av_malloc(len + 1);
684 static int parse_section_header(SectionHeader *h,
685 const uint8_t **pp, const uint8_t *p_end)
689 val = get8(pp, p_end);
694 val = get16(pp, p_end);
698 val = get8(pp, p_end);
701 h->version = (val >> 1) & 0x1f;
702 val = get8(pp, p_end);
706 val = get8(pp, p_end);
709 h->last_sec_num = val;
713 typedef struct StreamType {
714 uint32_t stream_type;
715 enum AVMediaType codec_type;
716 enum AVCodecID codec_id;
719 static const StreamType ISO_types[] = {
720 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
721 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
722 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
723 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
724 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
725 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
726 /* Makito encoder sets stream type 0x11 for AAC,
727 * so auto-detect LOAS/LATM instead of hardcoding it. */
728 #if !CONFIG_LOAS_DEMUXER
729 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
731 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
732 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
733 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
734 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
735 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
736 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
737 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
738 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
742 static const StreamType HDMV_types[] = {
743 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
744 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
745 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
746 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
747 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
748 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
749 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
750 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
751 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
752 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
753 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
758 static const StreamType SCTE_types[] = {
759 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
764 static const StreamType MISC_types[] = {
765 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
766 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
770 static const StreamType REGD_types[] = {
771 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
772 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
773 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
774 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
775 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
776 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
777 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
778 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
779 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
780 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
781 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
782 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
786 static const StreamType METADATA_types[] = {
787 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
788 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
792 /* descriptor present */
793 static const StreamType DESC_types[] = {
794 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
795 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
796 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
797 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
798 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
802 static void mpegts_find_stream_type(AVStream *st,
803 uint32_t stream_type,
804 const StreamType *types)
806 for (; types->stream_type; types++)
807 if (stream_type == types->stream_type) {
808 if (st->codecpar->codec_type != types->codec_type ||
809 st->codecpar->codec_id != types->codec_id) {
810 st->codecpar->codec_type = types->codec_type;
811 st->codecpar->codec_id = types->codec_id;
812 st->internal->need_context_update = 1;
814 st->request_probe = 0;
819 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
820 uint32_t stream_type, uint32_t prog_reg_desc)
822 int old_codec_type = st->codecpar->codec_type;
823 int old_codec_id = st->codecpar->codec_id;
824 int old_codec_tag = st->codecpar->codec_tag;
826 if (avcodec_is_open(st->internal->avctx)) {
827 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
831 avpriv_set_pts_info(st, 33, 1, 90000);
833 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
834 st->codecpar->codec_id = AV_CODEC_ID_NONE;
835 st->need_parsing = AVSTREAM_PARSE_FULL;
837 pes->stream_type = stream_type;
839 av_log(pes->stream, AV_LOG_DEBUG,
840 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
841 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
843 st->codecpar->codec_tag = pes->stream_type;
845 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
846 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
847 st->request_probe = 50;
848 if ((prog_reg_desc == AV_RL32("HDMV") ||
849 prog_reg_desc == AV_RL32("HDPR")) &&
850 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
851 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
852 if (pes->stream_type == 0x83) {
853 // HDMV TrueHD streams also contain an AC3 coded version of the
854 // audio track - add a second stream for this
856 // priv_data cannot be shared between streams
857 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
859 return AVERROR(ENOMEM);
860 memcpy(sub_pes, pes, sizeof(*sub_pes));
862 sub_st = avformat_new_stream(pes->stream, NULL);
865 return AVERROR(ENOMEM);
868 sub_st->id = pes->pid;
869 avpriv_set_pts_info(sub_st, 33, 1, 90000);
870 sub_st->priv_data = sub_pes;
871 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
872 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
873 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
874 sub_pes->sub_st = pes->sub_st = sub_st;
877 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
878 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
879 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
880 st->codecpar->codec_id = old_codec_id;
881 st->codecpar->codec_type = old_codec_type;
883 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
884 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
885 st->probe_packets > 0 &&
886 stream_type == STREAM_TYPE_PRIVATE_DATA) {
887 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
888 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
889 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
892 /* queue a context update if properties changed */
893 if (old_codec_type != st->codecpar->codec_type ||
894 old_codec_id != st->codecpar->codec_id ||
895 old_codec_tag != st->codecpar->codec_tag)
896 st->internal->need_context_update = 1;
901 static void reset_pes_packet_state(PESContext *pes)
903 pes->pts = AV_NOPTS_VALUE;
904 pes->dts = AV_NOPTS_VALUE;
907 av_buffer_unref(&pes->buffer);
910 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
913 pkt->data = (uint8_t *)buffer;
917 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
923 pkt->buf = pes->buffer;
924 pkt->data = pes->buffer->data;
925 pkt->size = pes->data_index;
927 if (pes->total_size != MAX_PES_PAYLOAD &&
928 pes->pes_header_size + pes->data_index != pes->total_size +
930 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
931 pes->flags |= AV_PKT_FLAG_CORRUPT;
933 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
935 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
936 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
937 pkt->stream_index = pes->sub_st->index;
939 pkt->stream_index = pes->st->index;
942 /* store position of first TS packet of this PES packet */
943 pkt->pos = pes->ts_packet_pos;
944 pkt->flags = pes->flags;
947 reset_pes_packet_state(pes);
949 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
951 return AVERROR(ENOMEM);
952 *sd = pes->stream_id;
957 static uint64_t get_ts64(GetBitContext *gb, int bits)
959 if (get_bits_left(gb) < bits)
960 return AV_NOPTS_VALUE;
961 return get_bits64(gb, bits);
964 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
965 const uint8_t *buf, int buf_size)
968 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
969 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
970 int dts_flag = -1, cts_flag = -1;
971 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
972 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
973 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
975 memcpy(buf_padded, buf, buf_padded_size);
977 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
979 if (sl->use_au_start)
980 au_start_flag = get_bits1(&gb);
982 au_end_flag = get_bits1(&gb);
983 if (!sl->use_au_start && !sl->use_au_end)
984 au_start_flag = au_end_flag = 1;
986 ocr_flag = get_bits1(&gb);
988 idle_flag = get_bits1(&gb);
990 padding_flag = get_bits1(&gb);
992 padding_bits = get_bits(&gb, 3);
994 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
995 if (sl->packet_seq_num_len)
996 skip_bits_long(&gb, sl->packet_seq_num_len);
997 if (sl->degr_prior_len)
999 skip_bits(&gb, sl->degr_prior_len);
1001 skip_bits_long(&gb, sl->ocr_len);
1002 if (au_start_flag) {
1003 if (sl->use_rand_acc_pt)
1005 if (sl->au_seq_num_len > 0)
1006 skip_bits_long(&gb, sl->au_seq_num_len);
1007 if (sl->use_timestamps) {
1008 dts_flag = get_bits1(&gb);
1009 cts_flag = get_bits1(&gb);
1012 if (sl->inst_bitrate_len)
1013 inst_bitrate_flag = get_bits1(&gb);
1015 dts = get_ts64(&gb, sl->timestamp_len);
1017 cts = get_ts64(&gb, sl->timestamp_len);
1019 skip_bits_long(&gb, sl->au_len);
1020 if (inst_bitrate_flag)
1021 skip_bits_long(&gb, sl->inst_bitrate_len);
1024 if (dts != AV_NOPTS_VALUE)
1026 if (cts != AV_NOPTS_VALUE)
1029 if (sl->timestamp_len && sl->timestamp_res)
1030 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1032 return (get_bits_count(&gb) + 7) >> 3;
1035 /* return non zero if a packet could be constructed */
1036 static int mpegts_push_data(MpegTSFilter *filter,
1037 const uint8_t *buf, int buf_size, int is_start,
1040 PESContext *pes = filter->u.pes_filter.opaque;
1041 MpegTSContext *ts = pes->ts;
1049 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1050 ret = new_pes_packet(pes, ts->pkt);
1055 reset_pes_packet_state(pes);
1057 pes->state = MPEGTS_HEADER;
1058 pes->ts_packet_pos = pos;
1061 while (buf_size > 0) {
1062 switch (pes->state) {
1064 len = PES_START_SIZE - pes->data_index;
1067 memcpy(pes->header + pes->data_index, p, len);
1068 pes->data_index += len;
1071 if (pes->data_index == PES_START_SIZE) {
1072 /* we got all the PES or section header. We can now
1074 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1075 pes->header[2] == 0x01) {
1076 /* it must be an MPEG-2 PES stream */
1077 code = pes->header[3] | 0x100;
1078 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1080 pes->stream_id = pes->header[3];
1082 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1084 pes->sub_st->discard == AVDISCARD_ALL)) ||
1085 code == 0x1be) /* padding_stream */
1088 /* stream not present in PMT */
1090 if (ts->skip_changes)
1092 if (ts->merge_pmt_versions)
1093 goto skip; /* wait for PMT to merge new stream */
1095 pes->st = avformat_new_stream(ts->stream, NULL);
1097 return AVERROR(ENOMEM);
1098 pes->st->id = pes->pid;
1099 mpegts_set_stream_info(pes->st, pes, 0, 0);
1102 pes->total_size = AV_RB16(pes->header + 4);
1103 /* NOTE: a zero total size means the PES size is
1105 if (!pes->total_size)
1106 pes->total_size = MAX_PES_PAYLOAD;
1108 /* allocate pes buffer */
1109 pes->buffer = av_buffer_alloc(pes->total_size +
1110 AV_INPUT_BUFFER_PADDING_SIZE);
1112 return AVERROR(ENOMEM);
1114 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1115 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1116 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1117 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1118 pes->state = MPEGTS_PESHEADER;
1119 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1120 av_log(pes->stream, AV_LOG_TRACE,
1121 "pid=%x stream_type=%x probing\n",
1124 pes->st->request_probe = 1;
1127 pes->pes_header_size = 6;
1128 pes->state = MPEGTS_PAYLOAD;
1129 pes->data_index = 0;
1132 /* otherwise, it should be a table */
1135 pes->state = MPEGTS_SKIP;
1140 /**********************************************/
1141 /* PES packing parsing */
1142 case MPEGTS_PESHEADER:
1143 len = PES_HEADER_SIZE - pes->data_index;
1145 return AVERROR_INVALIDDATA;
1148 memcpy(pes->header + pes->data_index, p, len);
1149 pes->data_index += len;
1152 if (pes->data_index == PES_HEADER_SIZE) {
1153 pes->pes_header_size = pes->header[8] + 9;
1154 pes->state = MPEGTS_PESHEADER_FILL;
1157 case MPEGTS_PESHEADER_FILL:
1158 len = pes->pes_header_size - pes->data_index;
1160 return AVERROR_INVALIDDATA;
1163 memcpy(pes->header + pes->data_index, p, len);
1164 pes->data_index += len;
1167 if (pes->data_index == pes->pes_header_size) {
1169 unsigned int flags, pes_ext, skip;
1171 flags = pes->header[7];
1172 r = pes->header + 9;
1173 pes->pts = AV_NOPTS_VALUE;
1174 pes->dts = AV_NOPTS_VALUE;
1175 if ((flags & 0xc0) == 0x80) {
1176 pes->dts = pes->pts = ff_parse_pes_pts(r);
1178 } else if ((flags & 0xc0) == 0xc0) {
1179 pes->pts = ff_parse_pes_pts(r);
1181 pes->dts = ff_parse_pes_pts(r);
1184 pes->extended_stream_id = -1;
1185 if (flags & 0x01) { /* PES extension */
1187 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1188 skip = (pes_ext >> 4) & 0xb;
1191 if ((pes_ext & 0x41) == 0x01 &&
1192 (r + 2) <= (pes->header + pes->pes_header_size)) {
1193 /* PES extension 2 */
1194 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1195 pes->extended_stream_id = r[1];
1199 /* we got the full header. We parse it and get the payload */
1200 pes->state = MPEGTS_PAYLOAD;
1201 pes->data_index = 0;
1202 if (pes->stream_type == 0x12 && buf_size > 0) {
1203 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1205 pes->pes_header_size += sl_header_bytes;
1206 p += sl_header_bytes;
1207 buf_size -= sl_header_bytes;
1209 if (pes->stream_type == 0x15 && buf_size >= 5) {
1210 /* skip metadata access unit header */
1211 pes->pes_header_size += 5;
1215 if ( pes->ts->fix_teletext_pts
1216 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1217 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1219 AVProgram *p = NULL;
1220 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1221 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1222 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1224 AVStream *st = NULL;
1225 if (f->type == MPEGTS_PES) {
1226 PESContext *pcrpes = f->u.pes_filter.opaque;
1229 } else if (f->type == MPEGTS_PCR) {
1231 for (i = 0; i < p->nb_stream_indexes; i++) {
1232 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1233 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1237 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1238 // teletext packets do not always have correct timestamps,
1239 // the standard says they should be handled after 40.6 ms at most,
1240 // and the pcr error to this packet should be no more than 100 ms.
1241 // TODO: we should interpolate the PCR, not just use the last one
1242 int64_t pcr = f->last_pcr / 300;
1243 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1244 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1245 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1246 pes->pts = pes->dts = pcr;
1247 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1248 pes->dts > pcr + 3654 + 9000) {
1249 pes->pts = pes->dts = pcr + 3654 + 9000;
1250 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1251 pes->dts > pcr + 10*90000) { //10sec
1252 pes->pts = pes->dts = pcr + 3654 + 9000;
1262 case MPEGTS_PAYLOAD:
1264 if (pes->data_index > 0 &&
1265 pes->data_index + buf_size > pes->total_size) {
1266 ret = new_pes_packet(pes, ts->pkt);
1269 pes->total_size = MAX_PES_PAYLOAD;
1270 pes->buffer = av_buffer_alloc(pes->total_size +
1271 AV_INPUT_BUFFER_PADDING_SIZE);
1273 return AVERROR(ENOMEM);
1275 } else if (pes->data_index == 0 &&
1276 buf_size > pes->total_size) {
1277 // pes packet size is < ts size packet and pes data is padded with 0xff
1278 // not sure if this is legal in ts but see issue #2392
1279 buf_size = pes->total_size;
1281 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1282 pes->data_index += buf_size;
1283 /* emit complete packets with known packet size
1284 * decreases demuxer delay for infrequent packets like subtitles from
1285 * a couple of seconds to milliseconds for properly muxed files.
1286 * total_size is the number of bytes following pes_packet_length
1287 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1288 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1289 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1291 ret = new_pes_packet(pes, ts->pkt);
1307 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1312 /* if no pid found, then add a pid context */
1313 pes = av_mallocz(sizeof(PESContext));
1317 pes->stream = ts->stream;
1319 pes->pcr_pid = pcr_pid;
1320 pes->state = MPEGTS_SKIP;
1321 pes->pts = AV_NOPTS_VALUE;
1322 pes->dts = AV_NOPTS_VALUE;
1323 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1332 typedef struct MP4DescrParseContext {
1336 Mp4Descr *active_descr;
1338 int max_descr_count;
1340 int predefined_SLConfigDescriptor_seen;
1341 } MP4DescrParseContext;
1343 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1344 const uint8_t *buf, unsigned size,
1345 Mp4Descr *descr, int max_descr_count)
1348 if (size > (1 << 30))
1349 return AVERROR_INVALIDDATA;
1351 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1352 NULL, NULL, NULL, NULL)) < 0)
1359 d->active_descr = NULL;
1360 d->max_descr_count = max_descr_count;
1365 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1367 int64_t new_off = avio_tell(pb);
1368 (*len) -= new_off - *off;
1372 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1375 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1378 int ret = parse_mp4_descr(d, off, len, 0);
1381 update_offsets(&d->pb, &off, &len);
1386 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1388 avio_rb16(&d->pb); // ID
1394 update_offsets(&d->pb, &off, &len);
1395 return parse_mp4_descr_arr(d, off, len);
1398 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1403 id_flags = avio_rb16(&d->pb);
1404 if (!(id_flags & 0x0020)) { // URL_Flag
1405 update_offsets(&d->pb, &off, &len);
1406 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1412 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1417 if (d->descr_count >= d->max_descr_count)
1418 return AVERROR_INVALIDDATA;
1419 ff_mp4_parse_es_descr(&d->pb, &es_id);
1420 d->active_descr = d->descr + (d->descr_count++);
1422 d->active_descr->es_id = es_id;
1423 update_offsets(&d->pb, &off, &len);
1424 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1426 update_offsets(&d->pb, &off, &len);
1428 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1429 d->active_descr = NULL;
1433 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1436 Mp4Descr *descr = d->active_descr;
1438 return AVERROR_INVALIDDATA;
1439 d->active_descr->dec_config_descr = av_malloc(len);
1440 if (!descr->dec_config_descr)
1441 return AVERROR(ENOMEM);
1442 descr->dec_config_descr_len = len;
1443 avio_read(&d->pb, descr->dec_config_descr, len);
1447 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1449 Mp4Descr *descr = d->active_descr;
1452 return AVERROR_INVALIDDATA;
1454 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1455 descr->sl.dst = avio_r8(&d->pb); \
1456 if (descr->sl.dst > maxv) { \
1457 descr->sl.dst = maxv; \
1458 return AVERROR_INVALIDDATA; \
1462 predefined = avio_r8(&d->pb);
1465 int flags = avio_r8(&d->pb);
1466 descr->sl.use_au_start = !!(flags & 0x80);
1467 descr->sl.use_au_end = !!(flags & 0x40);
1468 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1469 descr->sl.use_padding = !!(flags & 0x08);
1470 descr->sl.use_timestamps = !!(flags & 0x04);
1471 descr->sl.use_idle = !!(flags & 0x02);
1472 descr->sl.timestamp_res = avio_rb32(&d->pb);
1474 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1475 R8_CHECK_CLIP_MAX(ocr_len, 63);
1476 R8_CHECK_CLIP_MAX(au_len, 31);
1477 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1478 lengths = avio_rb16(&d->pb);
1479 descr->sl.degr_prior_len = lengths >> 12;
1480 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1481 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1482 } else if (!d->predefined_SLConfigDescriptor_seen){
1483 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1484 d->predefined_SLConfigDescriptor_seen = 1;
1489 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1493 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1496 update_offsets(&d->pb, &off, &len);
1497 if (len < 0 || len1 > len || len1 <= 0) {
1498 av_log(d->s, AV_LOG_ERROR,
1499 "Tag %x length violation new length %d bytes remaining %d\n",
1501 return AVERROR_INVALIDDATA;
1504 if (d->level++ >= MAX_LEVEL) {
1505 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1506 ret = AVERROR_INVALIDDATA;
1510 if (target_tag && tag != target_tag) {
1511 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1513 ret = AVERROR_INVALIDDATA;
1519 ret = parse_MP4IODescrTag(d, off, len1);
1522 ret = parse_MP4ODescrTag(d, off, len1);
1525 ret = parse_MP4ESDescrTag(d, off, len1);
1527 case MP4DecConfigDescrTag:
1528 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1531 ret = parse_MP4SLDescrTag(d, off, len1);
1538 avio_seek(&d->pb, off + len1, SEEK_SET);
1542 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1543 Mp4Descr *descr, int *descr_count, int max_descr_count)
1545 MP4DescrParseContext d;
1548 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1552 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1554 *descr_count = d.descr_count;
1558 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1559 Mp4Descr *descr, int *descr_count, int max_descr_count)
1561 MP4DescrParseContext d;
1564 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1568 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1570 *descr_count = d.descr_count;
1574 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1577 MpegTSContext *ts = filter->u.section_filter.opaque;
1578 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1580 const uint8_t *p, *p_end;
1582 int mp4_descr_count = 0;
1583 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1585 AVFormatContext *s = ts->stream;
1587 p_end = section + section_len - 4;
1589 if (parse_section_header(&h, &p, p_end) < 0)
1591 if (h.tid != M4OD_TID)
1593 if (skip_identical(&h, tssf))
1596 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1597 MAX_MP4_DESCR_COUNT);
1599 for (pid = 0; pid < NB_PID_MAX; pid++) {
1602 for (i = 0; i < mp4_descr_count; i++) {
1605 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1607 if (ts->pids[pid]->type != MPEGTS_PES) {
1608 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1611 pes = ts->pids[pid]->u.pes_filter.opaque;
1616 pes->sl = mp4_descr[i].sl;
1618 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1619 mp4_descr[i].dec_config_descr_len, 0,
1620 NULL, NULL, NULL, NULL);
1621 ff_mp4_read_dec_config_descr(s, st, &pb);
1622 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1623 st->codecpar->extradata_size > 0)
1624 st->need_parsing = 0;
1625 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1626 st->codecpar->extradata_size > 0)
1627 st->need_parsing = 0;
1629 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1630 st->internal->need_context_update = 1;
1633 for (i = 0; i < mp4_descr_count; i++)
1634 av_free(mp4_descr[i].dec_config_descr);
1637 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1640 AVProgram *prg = NULL;
1641 MpegTSContext *ts = filter->u.section_filter.opaque;
1643 int idx = ff_find_stream_index(ts->stream, filter->pid);
1647 new_data_packet(section, section_len, ts->pkt);
1648 ts->pkt->stream_index = idx;
1649 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1650 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1651 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1652 if (f && f->last_pcr != -1)
1653 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1659 static const uint8_t opus_coupled_stream_cnt[9] = {
1660 1, 0, 1, 1, 2, 2, 2, 3, 3
1663 static const uint8_t opus_stream_cnt[9] = {
1664 1, 1, 1, 2, 2, 3, 4, 4, 5,
1667 static const uint8_t opus_channel_map[8][8] = {
1675 { 0,6,1,2,3,4,5,7 },
1678 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1679 const uint8_t **pp, const uint8_t *desc_list_end,
1680 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1683 const uint8_t *desc_end;
1684 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1688 desc_tag = get8(pp, desc_list_end);
1690 return AVERROR_INVALIDDATA;
1691 desc_len = get8(pp, desc_list_end);
1693 return AVERROR_INVALIDDATA;
1694 desc_end = *pp + desc_len;
1695 if (desc_end > desc_list_end)
1696 return AVERROR_INVALIDDATA;
1698 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1700 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1701 stream_type == STREAM_TYPE_PRIVATE_DATA)
1702 mpegts_find_stream_type(st, desc_tag, DESC_types);
1705 case 0x02: /* video stream descriptor */
1706 if (get8(pp, desc_end) & 0x1) {
1707 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1710 case 0x1E: /* SL descriptor */
1711 desc_es_id = get16(pp, desc_end);
1714 if (ts && ts->pids[pid])
1715 ts->pids[pid]->es_id = desc_es_id;
1716 for (i = 0; i < mp4_descr_count; i++)
1717 if (mp4_descr[i].dec_config_descr_len &&
1718 mp4_descr[i].es_id == desc_es_id) {
1720 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1721 mp4_descr[i].dec_config_descr_len, 0,
1722 NULL, NULL, NULL, NULL);
1723 ff_mp4_read_dec_config_descr(fc, st, &pb);
1724 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1725 st->codecpar->extradata_size > 0) {
1726 st->need_parsing = 0;
1727 st->internal->need_context_update = 1;
1729 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1730 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1733 case 0x1F: /* FMC descriptor */
1734 if (get16(pp, desc_end) < 0)
1736 if (mp4_descr_count > 0 &&
1737 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1738 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1739 st->request_probe > 0) &&
1740 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1742 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1743 mp4_descr->dec_config_descr_len, 0,
1744 NULL, NULL, NULL, NULL);
1745 ff_mp4_read_dec_config_descr(fc, st, &pb);
1746 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1747 st->codecpar->extradata_size > 0) {
1748 st->request_probe = st->need_parsing = 0;
1749 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1750 st->internal->need_context_update = 1;
1754 case 0x56: /* DVB teletext descriptor */
1756 uint8_t *extradata = NULL;
1757 int language_count = desc_len / 5;
1759 if (desc_len > 0 && desc_len % 5 != 0)
1760 return AVERROR_INVALIDDATA;
1762 if (language_count > 0) {
1763 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1764 av_assert0(language_count <= sizeof(language) / 4);
1766 if (st->codecpar->extradata == NULL) {
1767 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1768 return AVERROR(ENOMEM);
1772 if (st->codecpar->extradata_size < language_count * 2)
1773 return AVERROR_INVALIDDATA;
1775 extradata = st->codecpar->extradata;
1777 for (i = 0; i < language_count; i++) {
1778 language[i * 4 + 0] = get8(pp, desc_end);
1779 language[i * 4 + 1] = get8(pp, desc_end);
1780 language[i * 4 + 2] = get8(pp, desc_end);
1781 language[i * 4 + 3] = ',';
1783 memcpy(extradata, *pp, 2);
1789 language[i * 4 - 1] = 0;
1790 av_dict_set(&st->metadata, "language", language, 0);
1791 st->internal->need_context_update = 1;
1795 case 0x59: /* subtitling descriptor */
1797 /* 8 bytes per DVB subtitle substream data:
1798 * ISO_639_language_code (3 bytes),
1799 * subtitling_type (1 byte),
1800 * composition_page_id (2 bytes),
1801 * ancillary_page_id (2 bytes) */
1802 int language_count = desc_len / 8;
1804 if (desc_len > 0 && desc_len % 8 != 0)
1805 return AVERROR_INVALIDDATA;
1807 if (language_count > 1) {
1808 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1811 if (language_count > 0) {
1814 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1815 av_assert0(language_count <= sizeof(language) / 4);
1817 if (st->codecpar->extradata == NULL) {
1818 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1819 return AVERROR(ENOMEM);
1823 if (st->codecpar->extradata_size < language_count * 5)
1824 return AVERROR_INVALIDDATA;
1826 extradata = st->codecpar->extradata;
1828 for (i = 0; i < language_count; i++) {
1829 language[i * 4 + 0] = get8(pp, desc_end);
1830 language[i * 4 + 1] = get8(pp, desc_end);
1831 language[i * 4 + 2] = get8(pp, desc_end);
1832 language[i * 4 + 3] = ',';
1834 /* hearing impaired subtitles detection using subtitling_type */
1836 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1837 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1838 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1839 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1840 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1841 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1842 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1846 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1847 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1853 language[i * 4 - 1] = 0;
1854 av_dict_set(&st->metadata, "language", language, 0);
1855 st->internal->need_context_update = 1;
1859 case 0x0a: /* ISO 639 language descriptor */
1860 for (i = 0; i + 4 <= desc_len; i += 4) {
1861 language[i + 0] = get8(pp, desc_end);
1862 language[i + 1] = get8(pp, desc_end);
1863 language[i + 2] = get8(pp, desc_end);
1864 language[i + 3] = ',';
1865 switch (get8(pp, desc_end)) {
1867 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1870 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1873 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1874 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1878 if (i && language[0]) {
1879 language[i - 1] = 0;
1880 /* don't overwrite language, as it may already have been set by
1881 * another, more specific descriptor (e.g. supplementary audio) */
1882 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1885 case 0x05: /* registration descriptor */
1886 st->codecpar->codec_tag = bytestream_get_le32(pp);
1887 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1888 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1889 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1890 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1891 st->request_probe = 50;
1894 case 0x52: /* stream identifier descriptor */
1895 st->stream_identifier = 1 + get8(pp, desc_end);
1897 case 0x26: /* metadata descriptor */
1898 if (get16(pp, desc_end) == 0xFFFF)
1900 if (get8(pp, desc_end) == 0xFF) {
1901 st->codecpar->codec_tag = bytestream_get_le32(pp);
1902 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1903 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1906 case 0x7f: /* DVB extension descriptor */
1907 ext_desc_tag = get8(pp, desc_end);
1908 if (ext_desc_tag < 0)
1909 return AVERROR_INVALIDDATA;
1910 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1911 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1912 if (!st->codecpar->extradata) {
1913 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1914 AV_INPUT_BUFFER_PADDING_SIZE);
1915 if (!st->codecpar->extradata)
1916 return AVERROR(ENOMEM);
1918 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1919 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1921 channel_config_code = get8(pp, desc_end);
1922 if (channel_config_code < 0)
1923 return AVERROR_INVALIDDATA;
1924 if (channel_config_code <= 0x8) {
1925 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1926 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1927 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1928 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1929 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1931 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1933 st->need_parsing = AVSTREAM_PARSE_FULL;
1934 st->internal->need_context_update = 1;
1937 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
1941 return AVERROR_INVALIDDATA;
1942 flags = get8(pp, desc_end);
1944 if ((flags & 0x80) == 0) /* mix_type */
1945 st->disposition |= AV_DISPOSITION_DEPENDENT;
1947 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
1949 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1950 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1953 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1956 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1960 if (flags & 0x01) { /* language_code_present */
1962 return AVERROR_INVALIDDATA;
1963 language[0] = get8(pp, desc_end);
1964 language[1] = get8(pp, desc_end);
1965 language[2] = get8(pp, desc_end);
1968 /* This language always has to override a possible
1969 * ISO 639 language descriptor language */
1971 av_dict_set(&st->metadata, "language", language, 0);
1975 case 0x6a: /* ac-3_descriptor */
1977 int component_type_flag = get8(pp, desc_end) & (1 << 7);
1978 if (component_type_flag) {
1979 int component_type = get8(pp, desc_end);
1980 int service_type_mask = 0x38; // 0b00111000
1981 int service_type = ((component_type & service_type_mask) >> 3);
1982 if (service_type == 0x02 /* 0b010 */) {
1983 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1984 av_log(ts->stream, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
1989 case 0x7a: /* enhanced_ac-3_descriptor */
1991 int component_type_flag = get8(pp, desc_end) & (1 << 7);
1992 if (component_type_flag) {
1993 int component_type = get8(pp, desc_end);
1994 int service_type_mask = 0x38; // 0b00111000
1995 int service_type = ((component_type & service_type_mask) >> 3);
1996 if (service_type == 0x02 /* 0b010 */) {
1997 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1998 av_log(ts->stream, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2010 static AVStream *find_matching_stream(MpegTSContext *ts, int pid,
2011 int stream_identifier, int pmt_stream_idx)
2013 AVFormatContext *s = ts->stream;
2015 AVStream *found = NULL;
2017 for (i = 0; i < s->nb_streams; i++) {
2018 AVStream *st = s->streams[i];
2019 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2020 if (st->stream_identifier == stream_identifier+1) {
2024 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2031 av_log(ts->stream, AV_LOG_VERBOSE,
2032 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2033 av_get_media_type_string(found->codecpar->codec_type),
2040 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2042 const uint8_t **pp = &p;
2043 const uint8_t *desc_list_end;
2044 const uint8_t *desc_end;
2046 int desc_len, desc_tag;
2048 desc_list_len = get16(pp, p_end);
2049 if (desc_list_len < 0)
2051 desc_list_len &= 0xfff;
2052 desc_list_end = p + desc_list_len;
2053 if (desc_list_end > p_end)
2057 desc_tag = get8(pp, desc_list_end);
2060 desc_len = get8(pp, desc_list_end);
2063 desc_end = *pp + desc_len;
2064 if (desc_end > desc_list_end)
2067 if (desc_tag == 0x52) {
2068 return get8(pp, desc_end);
2076 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2078 return !(stream_type == 0x13 ||
2079 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2082 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2084 MpegTSContext *ts = filter->u.section_filter.opaque;
2085 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2086 SectionHeader h1, *h = &h1;
2089 const uint8_t *p, *p_end, *desc_list_end;
2090 int program_info_length, pcr_pid, pid, stream_type;
2092 uint32_t prog_reg_desc = 0; /* registration descriptor */
2093 int stream_identifier = -1;
2095 int mp4_descr_count = 0;
2096 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2099 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2100 hex_dump_debug(ts->stream, section, section_len);
2102 p_end = section + section_len - 4;
2104 if (parse_section_header(h, &p, p_end) < 0)
2106 if (h->tid != PMT_TID)
2108 if (skip_identical(h, tssf))
2111 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2112 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2114 if (!ts->scan_all_pmts && ts->skip_changes)
2117 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2119 if (!ts->skip_clear)
2120 clear_program(ts, h->id);
2122 pcr_pid = get16(&p, p_end);
2126 add_pid_to_pmt(ts, h->id, pcr_pid);
2127 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2129 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2131 program_info_length = get16(&p, p_end);
2132 if (program_info_length < 0)
2134 program_info_length &= 0xfff;
2135 while (program_info_length >= 2) {
2137 tag = get8(&p, p_end);
2138 len = get8(&p, p_end);
2140 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2142 if (len > program_info_length - 2)
2143 // something else is broken, exit the program_descriptors_loop
2145 program_info_length -= len + 2;
2146 if (tag == 0x1d) { // IOD descriptor
2147 get8(&p, p_end); // scope
2148 get8(&p, p_end); // label
2150 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2151 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2152 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2153 prog_reg_desc = bytestream_get_le32(&p);
2158 p += program_info_length;
2162 // stop parsing after pmt, we found header
2163 if (!ts->stream->nb_streams)
2166 set_pmt_found(ts, h->id);
2169 for (i = 0; ; i++) {
2172 stream_type = get8(&p, p_end);
2173 if (stream_type < 0)
2175 pid = get16(&p, p_end);
2179 if (pid == ts->current_pid)
2182 if (ts->merge_pmt_versions)
2183 stream_identifier = parse_stream_identifier_desc(p, p_end);
2185 /* now create stream */
2186 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2187 pes = ts->pids[pid]->u.pes_filter.opaque;
2188 if (ts->merge_pmt_versions && !pes->st) {
2189 st = find_matching_stream(ts, pid, stream_identifier, i);
2192 pes->stream_type = stream_type;
2196 pes->st = avformat_new_stream(pes->stream, NULL);
2199 pes->st->id = pes->pid;
2200 pes->st->program_num = h->id;
2201 pes->st->pmt_version = h->version;
2202 pes->st->pmt_stream_idx = i;
2205 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2207 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2208 pes = add_pes_stream(ts, pid, pcr_pid);
2209 if (ts->merge_pmt_versions && pes && !pes->st) {
2210 st = find_matching_stream(ts, pid, stream_identifier, i);
2213 pes->stream_type = stream_type;
2216 if (pes && !pes->st) {
2217 st = avformat_new_stream(pes->stream, NULL);
2221 st->program_num = h->id;
2222 st->pmt_version = h->version;
2223 st->pmt_stream_idx = i;
2226 int idx = ff_find_stream_index(ts->stream, pid);
2228 st = ts->stream->streams[idx];
2230 if (ts->merge_pmt_versions && !st) {
2231 st = find_matching_stream(ts, pid, stream_identifier, i);
2234 st = avformat_new_stream(ts->stream, NULL);
2238 st->program_num = h->id;
2239 st->pmt_version = h->version;
2240 st->pmt_stream_idx = i;
2241 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2242 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2243 mpegts_find_stream_type(st, stream_type, SCTE_types);
2244 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2252 if (pes && !pes->stream_type)
2253 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2255 add_pid_to_pmt(ts, h->id, pid);
2257 av_program_add_stream_index(ts->stream, h->id, st->index);
2259 desc_list_len = get16(&p, p_end);
2260 if (desc_list_len < 0)
2262 desc_list_len &= 0xfff;
2263 desc_list_end = p + desc_list_len;
2264 if (desc_list_end > p_end)
2267 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2268 desc_list_end, mp4_descr,
2269 mp4_descr_count, pid, ts) < 0)
2272 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2273 stream_type == 0x83 && pes->sub_st) {
2274 av_program_add_stream_index(ts->stream, h->id,
2275 pes->sub_st->index);
2276 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2282 if (!ts->pids[pcr_pid])
2283 mpegts_open_pcr_filter(ts, pcr_pid);
2286 for (i = 0; i < mp4_descr_count; i++)
2287 av_free(mp4_descr[i].dec_config_descr);
2290 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2292 MpegTSContext *ts = filter->u.section_filter.opaque;
2293 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2294 SectionHeader h1, *h = &h1;
2295 const uint8_t *p, *p_end;
2299 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2300 hex_dump_debug(ts->stream, section, section_len);
2302 p_end = section + section_len - 4;
2304 if (parse_section_header(h, &p, p_end) < 0)
2306 if (h->tid != PAT_TID)
2308 if (ts->skip_changes)
2311 if (skip_identical(h, tssf))
2313 ts->stream->ts_id = h->id;
2317 sid = get16(&p, p_end);
2320 pmt_pid = get16(&p, p_end);
2325 if (pmt_pid == ts->current_pid)
2328 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2330 if (sid == 0x0000) {
2333 MpegTSFilter *fil = ts->pids[pmt_pid];
2334 program = av_new_program(ts->stream, sid);
2336 program->program_num = sid;
2337 program->pmt_pid = pmt_pid;
2340 if ( fil->type != MPEGTS_SECTION
2341 || fil->pid != pmt_pid
2342 || fil->u.section_filter.section_cb != pmt_cb)
2343 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2345 if (!ts->pids[pmt_pid])
2346 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2347 add_pat_entry(ts, sid);
2348 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2349 add_pid_to_pmt(ts, sid, pmt_pid);
2355 for (j=0; j<ts->stream->nb_programs; j++) {
2356 for (i = 0; i < ts->nb_prg; i++)
2357 if (ts->prg[i].id == ts->stream->programs[j]->id)
2359 if (i==ts->nb_prg && !ts->skip_clear)
2360 clear_avprogram(ts, ts->stream->programs[j]->id);
2365 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2367 MpegTSContext *ts = filter->u.section_filter.opaque;
2368 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2369 SectionHeader h1, *h = &h1;
2370 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2371 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2372 char *name, *provider_name;
2374 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2375 hex_dump_debug(ts->stream, section, section_len);
2377 p_end = section + section_len - 4;
2379 if (parse_section_header(h, &p, p_end) < 0)
2381 if (h->tid != SDT_TID)
2383 if (ts->skip_changes)
2385 if (skip_identical(h, tssf))
2388 onid = get16(&p, p_end);
2391 val = get8(&p, p_end);
2395 sid = get16(&p, p_end);
2398 val = get8(&p, p_end);
2401 desc_list_len = get16(&p, p_end);
2402 if (desc_list_len < 0)
2404 desc_list_len &= 0xfff;
2405 desc_list_end = p + desc_list_len;
2406 if (desc_list_end > p_end)
2409 desc_tag = get8(&p, desc_list_end);
2412 desc_len = get8(&p, desc_list_end);
2413 desc_end = p + desc_len;
2414 if (desc_len < 0 || desc_end > desc_list_end)
2417 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2418 desc_tag, desc_len);
2422 service_type = get8(&p, p_end);
2423 if (service_type < 0)
2425 provider_name = getstr8(&p, p_end);
2428 name = getstr8(&p, p_end);
2430 AVProgram *program = av_new_program(ts->stream, sid);
2432 av_dict_set(&program->metadata, "service_name", name, 0);
2433 av_dict_set(&program->metadata, "service_provider",
2438 av_free(provider_name);
2449 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2450 const uint8_t *packet);
2452 /* handle one TS packet */
2453 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2456 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2457 has_adaptation, has_payload;
2458 const uint8_t *p, *p_end;
2461 pid = AV_RB16(packet + 1) & 0x1fff;
2462 if (pid && discard_pid(ts, pid))
2464 is_start = packet[1] & 0x40;
2465 tss = ts->pids[pid];
2466 if (ts->auto_guess && !tss && is_start) {
2467 add_pes_stream(ts, pid, -1);
2468 tss = ts->pids[pid];
2472 ts->current_pid = pid;
2474 afc = (packet[3] >> 4) & 3;
2475 if (afc == 0) /* reserved value */
2477 has_adaptation = afc & 2;
2478 has_payload = afc & 1;
2479 is_discontinuity = has_adaptation &&
2480 packet[4] != 0 && /* with length > 0 */
2481 (packet[5] & 0x80); /* and discontinuity indicated */
2483 /* continuity check (currently not used) */
2484 cc = (packet[3] & 0xf);
2485 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2486 cc_ok = pid == 0x1FFF || // null packet PID
2493 av_log(ts->stream, AV_LOG_DEBUG,
2494 "Continuity check failed for pid %d expected %d got %d\n",
2495 pid, expected_cc, cc);
2496 if (tss->type == MPEGTS_PES) {
2497 PESContext *pc = tss->u.pes_filter.opaque;
2498 pc->flags |= AV_PKT_FLAG_CORRUPT;
2502 if (packet[1] & 0x80) {
2503 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2504 if (tss->type == MPEGTS_PES) {
2505 PESContext *pc = tss->u.pes_filter.opaque;
2506 pc->flags |= AV_PKT_FLAG_CORRUPT;
2511 if (has_adaptation) {
2514 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2515 tss->last_pcr = pcr_h * 300 + pcr_l;
2516 /* skip adaptation field */
2519 /* if past the end of packet, ignore */
2520 p_end = packet + TS_PACKET_SIZE;
2521 if (p >= p_end || !has_payload)
2524 pos = avio_tell(ts->stream->pb);
2526 av_assert0(pos >= TS_PACKET_SIZE);
2527 ts->pos47_full = pos - TS_PACKET_SIZE;
2530 if (tss->type == MPEGTS_SECTION) {
2532 /* pointer field present */
2534 if (len > p_end - p)
2537 /* write remaining section bytes */
2538 write_section_data(ts, tss,
2540 /* check whether filter has been closed */
2546 write_section_data(ts, tss,
2551 write_section_data(ts, tss,
2556 // stop find_stream_info from waiting for more streams
2557 // when all programs have received a PMT
2558 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2560 for (i = 0; i < ts->nb_prg; i++) {
2561 if (!ts->prg[i].pmt_found)
2564 if (i == ts->nb_prg && ts->nb_prg > 0) {
2566 for (i = 0; i < ts->stream->nb_streams; i++) {
2567 AVStream *st = ts->stream->streams[i];
2568 if (st->codecpar->codec_type >= 0)
2569 types |= 1<<st->codecpar->codec_type;
2571 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2572 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2573 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2580 // Note: The position here points actually behind the current packet.
2581 if (tss->type == MPEGTS_PES) {
2582 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2583 pos - ts->raw_packet_size)) < 0)
2591 static void reanalyze(MpegTSContext *ts) {
2592 AVIOContext *pb = ts->stream->pb;
2593 int64_t pos = avio_tell(pb);
2596 pos -= ts->pos47_full;
2597 if (pos == TS_PACKET_SIZE) {
2598 ts->size_stat[0] ++;
2599 } else if (pos == TS_DVHS_PACKET_SIZE) {
2600 ts->size_stat[1] ++;
2601 } else if (pos == TS_FEC_PACKET_SIZE) {
2602 ts->size_stat[2] ++;
2605 ts->size_stat_count ++;
2606 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2608 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2609 newsize = TS_PACKET_SIZE;
2610 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2611 newsize = TS_DVHS_PACKET_SIZE;
2612 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2613 newsize = TS_FEC_PACKET_SIZE;
2615 if (newsize && newsize != ts->raw_packet_size) {
2616 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2617 ts->raw_packet_size = newsize;
2619 ts->size_stat_count = 0;
2620 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2624 /* XXX: try to find a better synchro over several packets (use
2625 * get_packet_size() ?) */
2626 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2628 MpegTSContext *ts = s->priv_data;
2629 AVIOContext *pb = s->pb;
2631 uint64_t pos = avio_tell(pb);
2633 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2635 //Special case for files like 01c56b0dc1.ts
2636 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2637 avio_seek(pb, 12, SEEK_CUR);
2641 for (i = 0; i < ts->resync_size; i++) {
2646 avio_seek(pb, -1, SEEK_CUR);
2647 reanalyze(s->priv_data);
2651 av_log(s, AV_LOG_ERROR,
2652 "max resync size reached, could not find sync byte\n");
2654 return AVERROR_INVALIDDATA;
2657 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2658 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2659 const uint8_t **data)
2661 AVIOContext *pb = s->pb;
2665 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2666 if (len != TS_PACKET_SIZE)
2667 return len < 0 ? len : AVERROR_EOF;
2668 /* check packet sync byte */
2669 if ((*data)[0] != 0x47) {
2670 /* find a new packet start */
2672 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2673 return AVERROR(EAGAIN);
2683 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2685 AVIOContext *pb = s->pb;
2686 int skip = raw_packet_size - TS_PACKET_SIZE;
2688 avio_skip(pb, skip);
2691 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2693 AVFormatContext *s = ts->stream;
2694 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2695 const uint8_t *data;
2699 if (avio_tell(s->pb) != ts->last_pos) {
2701 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2702 /* seek detected, flush pes buffer */
2703 for (i = 0; i < NB_PID_MAX; i++) {
2705 if (ts->pids[i]->type == MPEGTS_PES) {
2706 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2707 av_buffer_unref(&pes->buffer);
2708 pes->data_index = 0;
2709 pes->state = MPEGTS_SKIP; /* skip until pes header */
2710 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2711 ts->pids[i]->u.section_filter.last_ver = -1;
2713 ts->pids[i]->last_cc = -1;
2714 ts->pids[i]->last_pcr = -1;
2721 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2724 if (nb_packets != 0 && packet_num >= nb_packets ||
2725 ts->stop_parse > 1) {
2726 ret = AVERROR(EAGAIN);
2729 if (ts->stop_parse > 0)
2732 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2735 ret = handle_packet(ts, data);
2736 finished_reading_packet(s, ts->raw_packet_size);
2740 ts->last_pos = avio_tell(s->pb);
2744 static int mpegts_probe(AVProbeData *p)
2746 const int size = p->buf_size;
2750 int check_count = size / TS_FEC_PACKET_SIZE;
2751 #define CHECK_COUNT 10
2752 #define CHECK_BLOCK 100
2757 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2758 int left = FFMIN(check_count - i, CHECK_BLOCK);
2759 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2760 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2761 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2762 score = FFMAX3(score, dvhs_score, fec_score);
2764 maxscore = FFMAX(maxscore, score);
2767 sumscore = sumscore * CHECK_COUNT / check_count;
2768 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2770 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2772 if (check_count > CHECK_COUNT && sumscore > 6) {
2773 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2774 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2775 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2776 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2777 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2778 } else if (sumscore > 6) {
2785 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2786 * (-1) if not available */
2787 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2789 int afc, len, flags;
2793 afc = (packet[3] >> 4) & 3;
2795 return AVERROR_INVALIDDATA;
2800 return AVERROR_INVALIDDATA;
2803 if (!(flags & 0x10))
2804 return AVERROR_INVALIDDATA;
2806 return AVERROR_INVALIDDATA;
2808 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2809 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2813 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2815 /* NOTE: We attempt to seek on non-seekable files as well, as the
2816 * probe buffer usually is big enough. Only warn if the seek failed
2817 * on files where the seek should work. */
2818 if (avio_seek(pb, pos, SEEK_SET) < 0)
2819 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2822 static int mpegts_read_header(AVFormatContext *s)
2824 MpegTSContext *ts = s->priv_data;
2825 AVIOContext *pb = s->pb;
2826 uint8_t buf[8 * 1024] = {0};
2828 int64_t pos, probesize = s->probesize;
2830 s->internal->prefer_codec_framerate = 1;
2832 if (ffio_ensure_seekback(pb, probesize) < 0)
2833 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2835 /* read the first 8192 bytes to get packet size */
2836 pos = avio_tell(pb);
2837 len = avio_read(pb, buf, sizeof(buf));
2838 ts->raw_packet_size = get_packet_size(buf, len);
2839 if (ts->raw_packet_size <= 0) {
2840 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2841 ts->raw_packet_size = TS_PACKET_SIZE;
2846 if (s->iformat == &ff_mpegts_demuxer) {
2849 /* first do a scan to get all the services */
2850 seek_back(s, pb, pos);
2852 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2854 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2856 handle_packets(ts, probesize / ts->raw_packet_size);
2857 /* if could not find service, enable auto_guess */
2861 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2863 s->ctx_flags |= AVFMTCTX_NOHEADER;
2866 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2867 int64_t pcrs[2], pcr_h;
2868 int packet_count[2];
2869 uint8_t packet[TS_PACKET_SIZE];
2870 const uint8_t *data;
2872 /* only read packets */
2874 st = avformat_new_stream(s, NULL);
2876 return AVERROR(ENOMEM);
2877 avpriv_set_pts_info(st, 60, 1, 27000000);
2878 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2879 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2881 /* we iterate until we find two PCRs to estimate the bitrate */
2886 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2889 pid = AV_RB16(data + 1) & 0x1fff;
2890 if ((pcr_pid == -1 || pcr_pid == pid) &&
2891 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2892 finished_reading_packet(s, ts->raw_packet_size);
2894 packet_count[nb_pcrs] = nb_packets;
2895 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2898 if (pcrs[1] - pcrs[0] > 0) {
2899 /* the difference needs to be positive to make sense for bitrate computation */
2902 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2904 packet_count[0] = packet_count[1];
2909 finished_reading_packet(s, ts->raw_packet_size);
2914 /* NOTE1: the bitrate is computed without the FEC */
2915 /* NOTE2: it is only the bitrate of the start of the stream */
2916 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2917 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2918 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2919 st->codecpar->bit_rate = s->bit_rate;
2920 st->start_time = ts->cur_pcr;
2921 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2922 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2925 seek_back(s, pb, pos);
2929 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2931 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2933 MpegTSContext *ts = s->priv_data;
2935 int64_t pcr_h, next_pcr_h, pos;
2936 int pcr_l, next_pcr_l;
2937 uint8_t pcr_buf[12];
2938 const uint8_t *data;
2940 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2941 return AVERROR(ENOMEM);
2942 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2943 pkt->pos = avio_tell(s->pb);
2945 av_packet_unref(pkt);
2948 if (data != pkt->data)
2949 memcpy(pkt->data, data, ts->raw_packet_size);
2950 finished_reading_packet(s, ts->raw_packet_size);
2951 if (ts->mpeg2ts_compute_pcr) {
2952 /* compute exact PCR for each packet */
2953 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2954 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2955 pos = avio_tell(s->pb);
2956 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2957 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2958 avio_read(s->pb, pcr_buf, 12);
2959 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2960 /* XXX: not precise enough */
2962 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2967 avio_seek(s->pb, pos, SEEK_SET);
2968 /* no next PCR found: we use previous increment */
2969 ts->cur_pcr = pcr_h * 300 + pcr_l;
2971 pkt->pts = ts->cur_pcr;
2972 pkt->duration = ts->pcr_incr;
2973 ts->cur_pcr += ts->pcr_incr;
2975 pkt->stream_index = 0;
2979 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2981 MpegTSContext *ts = s->priv_data;
2986 ret = handle_packets(ts, 0);
2988 av_packet_unref(ts->pkt);
2989 /* flush pes data left */
2990 for (i = 0; i < NB_PID_MAX; i++)
2991 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2992 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2993 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2994 ret = new_pes_packet(pes, pkt);
2997 pes->state = MPEGTS_SKIP;
3004 if (!ret && pkt->size < 0)
3005 ret = AVERROR_INVALIDDATA;
3009 static void mpegts_free(MpegTSContext *ts)
3015 for (i = 0; i < NB_PID_MAX; i++)
3017 mpegts_close_filter(ts, ts->pids[i]);
3020 static int mpegts_read_close(AVFormatContext *s)
3022 MpegTSContext *ts = s->priv_data;
3027 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3028 int64_t *ppos, int64_t pos_limit)
3030 MpegTSContext *ts = s->priv_data;
3031 int64_t pos, timestamp;
3032 uint8_t buf[TS_PACKET_SIZE];
3033 int pcr_l, pcr_pid =
3034 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3035 int pos47 = ts->pos47_full % ts->raw_packet_size;
3037 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3038 ts->raw_packet_size + pos47;
3039 while(pos < pos_limit) {
3040 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3041 return AV_NOPTS_VALUE;
3042 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3043 return AV_NOPTS_VALUE;
3044 if (buf[0] != 0x47) {
3045 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3046 return AV_NOPTS_VALUE;
3047 pos = avio_tell(s->pb);
3050 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3051 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3055 pos += ts->raw_packet_size;
3058 return AV_NOPTS_VALUE;
3061 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3062 int64_t *ppos, int64_t pos_limit)
3064 MpegTSContext *ts = s->priv_data;
3066 int pos47 = ts->pos47_full % ts->raw_packet_size;
3067 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3068 ff_read_frame_flush(s);
3069 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3070 return AV_NOPTS_VALUE;
3071 while(pos < pos_limit) {
3074 av_init_packet(&pkt);
3075 ret = av_read_frame(s, &pkt);
3077 return AV_NOPTS_VALUE;
3078 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3079 ff_reduce_index(s, pkt.stream_index);
3080 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3081 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3082 int64_t dts = pkt.dts;
3084 av_packet_unref(&pkt);
3089 av_packet_unref(&pkt);
3092 return AV_NOPTS_VALUE;
3095 /**************************************************************/
3096 /* parsing functions - called from other demuxers such as RTP */
3098 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3102 ts = av_mallocz(sizeof(MpegTSContext));
3105 /* no stream case, currently used by RTP */
3106 ts->raw_packet_size = TS_PACKET_SIZE;
3109 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3110 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3115 /* return the consumed length if a packet was output, or -1 if no
3116 * packet is output */
3117 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3118 const uint8_t *buf, int len)
3126 if (len < TS_PACKET_SIZE)
3127 return AVERROR_INVALIDDATA;
3128 if (buf[0] != 0x47) {
3132 handle_packet(ts, buf);
3133 buf += TS_PACKET_SIZE;
3134 len -= TS_PACKET_SIZE;
3135 if (ts->stop_parse == 1)
3142 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3148 AVInputFormat ff_mpegts_demuxer = {
3150 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3151 .priv_data_size = sizeof(MpegTSContext),
3152 .read_probe = mpegts_probe,
3153 .read_header = mpegts_read_header,
3154 .read_packet = mpegts_read_packet,
3155 .read_close = mpegts_read_close,
3156 .read_timestamp = mpegts_get_dts,
3157 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3158 .priv_class = &mpegts_class,
3161 AVInputFormat ff_mpegtsraw_demuxer = {
3162 .name = "mpegtsraw",
3163 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3164 .priv_data_size = sizeof(MpegTSContext),
3165 .read_header = mpegts_read_header,
3166 .read_packet = mpegts_raw_read_packet,
3167 .read_close = mpegts_read_close,
3168 .read_timestamp = mpegts_get_dts,
3169 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3170 .priv_class = &mpegtsraw_class,