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];
253 extern AVInputFormat ff_mpegts_demuxer;
255 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
258 for (i = 0; i < ts->nb_prg; i++) {
259 if (ts->prg[i].id == programid) {
266 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
268 AVProgram *prg = NULL;
271 for (i = 0; i < ts->stream->nb_programs; i++)
272 if (ts->stream->programs[i]->id == programid) {
273 prg = ts->stream->programs[i];
278 prg->nb_stream_indexes = 0;
281 static void clear_program(MpegTSContext *ts, unsigned int programid)
285 clear_avprogram(ts, programid);
286 for (i = 0; i < ts->nb_prg; i++)
287 if (ts->prg[i].id == programid) {
288 ts->prg[i].nb_pids = 0;
289 ts->prg[i].pmt_found = 0;
293 static void clear_programs(MpegTSContext *ts)
299 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
302 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
306 p = &ts->prg[ts->nb_prg];
313 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
316 struct Program *p = get_program(ts, programid);
321 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
324 for (i = 0; i < p->nb_pids; i++)
325 if (p->pids[i] == pid)
328 p->pids[p->nb_pids++] = pid;
331 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
333 struct Program *p = get_program(ts, programid);
340 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
341 unsigned int pid, int version)
344 for (i = 0; i < s->nb_programs; i++) {
345 AVProgram *program = s->programs[i];
346 if (program->id == programid) {
347 int old_pcr_pid = program->pcr_pid,
348 old_version = program->pmt_version;
349 program->pcr_pid = pid;
350 program->pmt_version = version;
352 if (old_version != -1 && old_version != version) {
353 av_log(s, AV_LOG_VERBOSE,
354 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
355 programid, old_version, version, old_pcr_pid, pid);
363 * @brief discard_pid() decides if the pid is to be discarded according
364 * to caller's programs selection
365 * @param ts : - TS context
367 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
370 static int discard_pid(MpegTSContext *ts, unsigned int pid)
373 int used = 0, discarded = 0;
376 /* If none of the programs have .discard=AVDISCARD_ALL then there's
377 * no way we have to discard this packet */
378 for (k = 0; k < ts->stream->nb_programs; k++)
379 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
381 if (k == ts->stream->nb_programs)
384 for (i = 0; i < ts->nb_prg; i++) {
386 for (j = 0; j < p->nb_pids; j++) {
387 if (p->pids[j] != pid)
389 // is program with id p->id set to be discarded?
390 for (k = 0; k < ts->stream->nb_programs; k++) {
391 if (ts->stream->programs[k]->id == p->id) {
392 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
401 return !used && discarded;
405 * Assemble PES packets out of TS packets, and then call the "section_cb"
406 * function when they are complete.
408 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
409 const uint8_t *buf, int buf_size, int is_start)
411 MpegTSSectionFilter *tss = &tss1->u.section_filter;
412 uint8_t *cur_section_buf = NULL;
416 memcpy(tss->section_buf, buf, buf_size);
417 tss->section_index = buf_size;
418 tss->section_h_size = -1;
419 tss->end_of_section_reached = 0;
421 if (tss->end_of_section_reached)
423 len = MAX_SECTION_SIZE - tss->section_index;
426 memcpy(tss->section_buf + tss->section_index, buf, len);
427 tss->section_index += len;
431 cur_section_buf = tss->section_buf;
432 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
433 /* compute section length if possible */
434 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
435 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
436 if (len > MAX_SECTION_SIZE)
438 tss->section_h_size = len;
441 if (tss->section_h_size != -1 &&
442 tss->section_index >= offset + tss->section_h_size) {
444 tss->end_of_section_reached = 1;
446 if (tss->check_crc) {
447 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
448 if (tss->section_h_size >= 4)
449 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
452 ts->crc_validity[ tss1->pid ] = 100;
453 }else if (ts->crc_validity[ tss1->pid ] > -10) {
454 ts->crc_validity[ tss1->pid ]--;
459 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
464 cur_section_buf += tss->section_h_size;
465 offset += tss->section_h_size;
466 tss->section_h_size = -1;
468 tss->section_h_size = -1;
469 tss->end_of_section_reached = 0;
475 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
476 enum MpegTSFilterType type)
478 MpegTSFilter *filter;
480 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
482 if (pid >= NB_PID_MAX || ts->pids[pid])
484 filter = av_mallocz(sizeof(MpegTSFilter));
487 ts->pids[pid] = filter;
492 filter->last_cc = -1;
493 filter->last_pcr= -1;
498 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
500 SectionCallback *section_cb,
504 MpegTSFilter *filter;
505 MpegTSSectionFilter *sec;
507 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
509 sec = &filter->u.section_filter;
510 sec->section_cb = section_cb;
511 sec->opaque = opaque;
512 sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
513 sec->check_crc = check_crc;
516 if (!sec->section_buf) {
523 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
527 MpegTSFilter *filter;
528 MpegTSPESFilter *pes;
530 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
533 pes = &filter->u.pes_filter;
534 pes->pes_cb = pes_cb;
535 pes->opaque = opaque;
539 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
541 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
544 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
549 if (filter->type == MPEGTS_SECTION)
550 av_freep(&filter->u.section_filter.section_buf);
551 else if (filter->type == MPEGTS_PES) {
552 PESContext *pes = filter->u.pes_filter.opaque;
553 av_buffer_unref(&pes->buffer);
554 /* referenced private data will be freed later in
555 * avformat_close_input (pes->st->priv_data == pes) */
556 if (!pes->st || pes->merged_st) {
557 av_freep(&filter->u.pes_filter.opaque);
562 ts->pids[pid] = NULL;
565 static int analyze(const uint8_t *buf, int size, int packet_size,
568 int stat[TS_MAX_PACKET_SIZE];
573 memset(stat, 0, packet_size * sizeof(*stat));
575 for (i = 0; i < size - 3; i++) {
576 if (buf[i] == 0x47) {
577 int pid = AV_RB16(buf+1) & 0x1FFF;
578 int asc = buf[i + 3] & 0x30;
579 if (!probe || pid == 0x1FFF || asc) {
580 int x = i % packet_size;
583 if (stat[x] > best_score) {
584 best_score = stat[x];
590 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
593 /* autodetect fec presence. Must have at least 1024 bytes */
594 static int get_packet_size(const uint8_t *buf, int size)
596 int score, fec_score, dvhs_score;
598 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
599 return AVERROR_INVALIDDATA;
601 score = analyze(buf, size, TS_PACKET_SIZE, 0);
602 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
603 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
604 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
605 score, dvhs_score, fec_score);
607 if (score > fec_score && score > dvhs_score)
608 return TS_PACKET_SIZE;
609 else if (dvhs_score > score && dvhs_score > fec_score)
610 return TS_DVHS_PACKET_SIZE;
611 else if (score < fec_score && dvhs_score < fec_score)
612 return TS_FEC_PACKET_SIZE;
614 return AVERROR_INVALIDDATA;
617 typedef struct SectionHeader {
622 uint8_t last_sec_num;
625 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
627 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
630 tssf->last_ver = h->version;
631 tssf->last_crc = tssf->crc;
636 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
643 return AVERROR_INVALIDDATA;
649 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
656 return AVERROR_INVALIDDATA;
663 /* read and allocate a DVB string preceded by its length */
664 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
671 len = get8(&p, p_end);
676 str = av_malloc(len + 1);
686 static int parse_section_header(SectionHeader *h,
687 const uint8_t **pp, const uint8_t *p_end)
691 val = get8(pp, p_end);
696 val = get16(pp, p_end);
700 val = get8(pp, p_end);
703 h->version = (val >> 1) & 0x1f;
704 val = get8(pp, p_end);
708 val = get8(pp, p_end);
711 h->last_sec_num = val;
715 typedef struct StreamType {
716 uint32_t stream_type;
717 enum AVMediaType codec_type;
718 enum AVCodecID codec_id;
721 static const StreamType ISO_types[] = {
722 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
723 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
724 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
725 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
726 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
727 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
728 /* Makito encoder sets stream type 0x11 for AAC,
729 * so auto-detect LOAS/LATM instead of hardcoding it. */
730 #if !CONFIG_LOAS_DEMUXER
731 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
733 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
734 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
735 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
736 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
737 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
738 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
739 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
740 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
744 static const StreamType HDMV_types[] = {
745 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
746 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
747 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
748 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
749 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
750 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
751 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
752 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
753 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
754 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
755 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
760 static const StreamType SCTE_types[] = {
761 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
766 static const StreamType MISC_types[] = {
767 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
768 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
772 static const StreamType REGD_types[] = {
773 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
774 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
775 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
776 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
777 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
778 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
779 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
780 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
781 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
782 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
783 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
784 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
788 static const StreamType METADATA_types[] = {
789 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
790 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
794 /* descriptor present */
795 static const StreamType DESC_types[] = {
796 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
797 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
798 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
799 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
800 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
804 static void mpegts_find_stream_type(AVStream *st,
805 uint32_t stream_type,
806 const StreamType *types)
808 for (; types->stream_type; types++)
809 if (stream_type == types->stream_type) {
810 if (st->codecpar->codec_type != types->codec_type ||
811 st->codecpar->codec_id != types->codec_id) {
812 st->codecpar->codec_type = types->codec_type;
813 st->codecpar->codec_id = types->codec_id;
814 st->internal->need_context_update = 1;
816 st->request_probe = 0;
821 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
822 uint32_t stream_type, uint32_t prog_reg_desc)
824 int old_codec_type = st->codecpar->codec_type;
825 int old_codec_id = st->codecpar->codec_id;
826 int old_codec_tag = st->codecpar->codec_tag;
828 if (avcodec_is_open(st->internal->avctx)) {
829 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
833 avpriv_set_pts_info(st, 33, 1, 90000);
835 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
836 st->codecpar->codec_id = AV_CODEC_ID_NONE;
837 st->need_parsing = AVSTREAM_PARSE_FULL;
839 pes->stream_type = stream_type;
841 av_log(pes->stream, AV_LOG_DEBUG,
842 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
843 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
845 st->codecpar->codec_tag = pes->stream_type;
847 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
848 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
849 st->request_probe = 50;
850 if ((prog_reg_desc == AV_RL32("HDMV") ||
851 prog_reg_desc == AV_RL32("HDPR")) &&
852 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
853 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
854 if (pes->stream_type == 0x83) {
855 // HDMV TrueHD streams also contain an AC3 coded version of the
856 // audio track - add a second stream for this
858 // priv_data cannot be shared between streams
859 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
861 return AVERROR(ENOMEM);
862 memcpy(sub_pes, pes, sizeof(*sub_pes));
864 sub_st = avformat_new_stream(pes->stream, NULL);
867 return AVERROR(ENOMEM);
870 sub_st->id = pes->pid;
871 avpriv_set_pts_info(sub_st, 33, 1, 90000);
872 sub_st->priv_data = sub_pes;
873 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
874 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
875 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
876 sub_pes->sub_st = pes->sub_st = sub_st;
879 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
880 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
881 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
882 st->codecpar->codec_id = old_codec_id;
883 st->codecpar->codec_type = old_codec_type;
885 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
886 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
887 st->probe_packets > 0 &&
888 stream_type == STREAM_TYPE_PRIVATE_DATA) {
889 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
890 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
891 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
894 /* queue a context update if properties changed */
895 if (old_codec_type != st->codecpar->codec_type ||
896 old_codec_id != st->codecpar->codec_id ||
897 old_codec_tag != st->codecpar->codec_tag)
898 st->internal->need_context_update = 1;
903 static void reset_pes_packet_state(PESContext *pes)
905 pes->pts = AV_NOPTS_VALUE;
906 pes->dts = AV_NOPTS_VALUE;
909 av_buffer_unref(&pes->buffer);
912 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
915 pkt->data = (uint8_t *)buffer;
919 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
925 pkt->buf = pes->buffer;
926 pkt->data = pes->buffer->data;
927 pkt->size = pes->data_index;
929 if (pes->total_size != MAX_PES_PAYLOAD &&
930 pes->pes_header_size + pes->data_index != pes->total_size +
932 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
933 pes->flags |= AV_PKT_FLAG_CORRUPT;
935 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
937 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
938 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
939 pkt->stream_index = pes->sub_st->index;
941 pkt->stream_index = pes->st->index;
944 /* store position of first TS packet of this PES packet */
945 pkt->pos = pes->ts_packet_pos;
946 pkt->flags = pes->flags;
949 reset_pes_packet_state(pes);
951 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
953 return AVERROR(ENOMEM);
954 *sd = pes->stream_id;
959 static uint64_t get_ts64(GetBitContext *gb, int bits)
961 if (get_bits_left(gb) < bits)
962 return AV_NOPTS_VALUE;
963 return get_bits64(gb, bits);
966 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
967 const uint8_t *buf, int buf_size)
970 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
971 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
972 int dts_flag = -1, cts_flag = -1;
973 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
974 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
975 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
977 memcpy(buf_padded, buf, buf_padded_size);
979 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
981 if (sl->use_au_start)
982 au_start_flag = get_bits1(&gb);
984 au_end_flag = get_bits1(&gb);
985 if (!sl->use_au_start && !sl->use_au_end)
986 au_start_flag = au_end_flag = 1;
988 ocr_flag = get_bits1(&gb);
990 idle_flag = get_bits1(&gb);
992 padding_flag = get_bits1(&gb);
994 padding_bits = get_bits(&gb, 3);
996 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
997 if (sl->packet_seq_num_len)
998 skip_bits_long(&gb, sl->packet_seq_num_len);
999 if (sl->degr_prior_len)
1001 skip_bits(&gb, sl->degr_prior_len);
1003 skip_bits_long(&gb, sl->ocr_len);
1004 if (au_start_flag) {
1005 if (sl->use_rand_acc_pt)
1007 if (sl->au_seq_num_len > 0)
1008 skip_bits_long(&gb, sl->au_seq_num_len);
1009 if (sl->use_timestamps) {
1010 dts_flag = get_bits1(&gb);
1011 cts_flag = get_bits1(&gb);
1014 if (sl->inst_bitrate_len)
1015 inst_bitrate_flag = get_bits1(&gb);
1017 dts = get_ts64(&gb, sl->timestamp_len);
1019 cts = get_ts64(&gb, sl->timestamp_len);
1021 skip_bits_long(&gb, sl->au_len);
1022 if (inst_bitrate_flag)
1023 skip_bits_long(&gb, sl->inst_bitrate_len);
1026 if (dts != AV_NOPTS_VALUE)
1028 if (cts != AV_NOPTS_VALUE)
1031 if (sl->timestamp_len && sl->timestamp_res)
1032 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1034 return (get_bits_count(&gb) + 7) >> 3;
1037 /* return non zero if a packet could be constructed */
1038 static int mpegts_push_data(MpegTSFilter *filter,
1039 const uint8_t *buf, int buf_size, int is_start,
1042 PESContext *pes = filter->u.pes_filter.opaque;
1043 MpegTSContext *ts = pes->ts;
1051 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1052 ret = new_pes_packet(pes, ts->pkt);
1057 reset_pes_packet_state(pes);
1059 pes->state = MPEGTS_HEADER;
1060 pes->ts_packet_pos = pos;
1063 while (buf_size > 0) {
1064 switch (pes->state) {
1066 len = PES_START_SIZE - pes->data_index;
1069 memcpy(pes->header + pes->data_index, p, len);
1070 pes->data_index += len;
1073 if (pes->data_index == PES_START_SIZE) {
1074 /* we got all the PES or section header. We can now
1076 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1077 pes->header[2] == 0x01) {
1078 /* it must be an MPEG-2 PES stream */
1079 code = pes->header[3] | 0x100;
1080 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1082 pes->stream_id = pes->header[3];
1084 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1086 pes->sub_st->discard == AVDISCARD_ALL)) ||
1087 code == 0x1be) /* padding_stream */
1090 /* stream not present in PMT */
1092 if (ts->skip_changes)
1094 if (ts->merge_pmt_versions)
1095 goto skip; /* wait for PMT to merge new stream */
1097 pes->st = avformat_new_stream(ts->stream, NULL);
1099 return AVERROR(ENOMEM);
1100 pes->st->id = pes->pid;
1101 mpegts_set_stream_info(pes->st, pes, 0, 0);
1104 pes->total_size = AV_RB16(pes->header + 4);
1105 /* NOTE: a zero total size means the PES size is
1107 if (!pes->total_size)
1108 pes->total_size = MAX_PES_PAYLOAD;
1110 /* allocate pes buffer */
1111 pes->buffer = av_buffer_alloc(pes->total_size +
1112 AV_INPUT_BUFFER_PADDING_SIZE);
1114 return AVERROR(ENOMEM);
1116 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1117 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1118 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1119 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1120 pes->state = MPEGTS_PESHEADER;
1121 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1122 av_log(pes->stream, AV_LOG_TRACE,
1123 "pid=%x stream_type=%x probing\n",
1126 pes->st->request_probe = 1;
1129 pes->pes_header_size = 6;
1130 pes->state = MPEGTS_PAYLOAD;
1131 pes->data_index = 0;
1134 /* otherwise, it should be a table */
1137 pes->state = MPEGTS_SKIP;
1142 /**********************************************/
1143 /* PES packing parsing */
1144 case MPEGTS_PESHEADER:
1145 len = PES_HEADER_SIZE - pes->data_index;
1147 return AVERROR_INVALIDDATA;
1150 memcpy(pes->header + pes->data_index, p, len);
1151 pes->data_index += len;
1154 if (pes->data_index == PES_HEADER_SIZE) {
1155 pes->pes_header_size = pes->header[8] + 9;
1156 pes->state = MPEGTS_PESHEADER_FILL;
1159 case MPEGTS_PESHEADER_FILL:
1160 len = pes->pes_header_size - pes->data_index;
1162 return AVERROR_INVALIDDATA;
1165 memcpy(pes->header + pes->data_index, p, len);
1166 pes->data_index += len;
1169 if (pes->data_index == pes->pes_header_size) {
1171 unsigned int flags, pes_ext, skip;
1173 flags = pes->header[7];
1174 r = pes->header + 9;
1175 pes->pts = AV_NOPTS_VALUE;
1176 pes->dts = AV_NOPTS_VALUE;
1177 if ((flags & 0xc0) == 0x80) {
1178 pes->dts = pes->pts = ff_parse_pes_pts(r);
1180 } else if ((flags & 0xc0) == 0xc0) {
1181 pes->pts = ff_parse_pes_pts(r);
1183 pes->dts = ff_parse_pes_pts(r);
1186 pes->extended_stream_id = -1;
1187 if (flags & 0x01) { /* PES extension */
1189 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1190 skip = (pes_ext >> 4) & 0xb;
1193 if ((pes_ext & 0x41) == 0x01 &&
1194 (r + 2) <= (pes->header + pes->pes_header_size)) {
1195 /* PES extension 2 */
1196 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1197 pes->extended_stream_id = r[1];
1201 /* we got the full header. We parse it and get the payload */
1202 pes->state = MPEGTS_PAYLOAD;
1203 pes->data_index = 0;
1204 if (pes->stream_type == 0x12 && buf_size > 0) {
1205 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1207 pes->pes_header_size += sl_header_bytes;
1208 p += sl_header_bytes;
1209 buf_size -= sl_header_bytes;
1211 if (pes->stream_type == 0x15 && buf_size >= 5) {
1212 /* skip metadata access unit header */
1213 pes->pes_header_size += 5;
1217 if ( pes->ts->fix_teletext_pts
1218 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1219 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1221 AVProgram *p = NULL;
1222 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1223 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1224 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1226 AVStream *st = NULL;
1227 if (f->type == MPEGTS_PES) {
1228 PESContext *pcrpes = f->u.pes_filter.opaque;
1231 } else if (f->type == MPEGTS_PCR) {
1233 for (i = 0; i < p->nb_stream_indexes; i++) {
1234 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1235 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1239 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1240 // teletext packets do not always have correct timestamps,
1241 // the standard says they should be handled after 40.6 ms at most,
1242 // and the pcr error to this packet should be no more than 100 ms.
1243 // TODO: we should interpolate the PCR, not just use the last one
1244 int64_t pcr = f->last_pcr / 300;
1245 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1246 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1247 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1248 pes->pts = pes->dts = pcr;
1249 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1250 pes->dts > pcr + 3654 + 9000) {
1251 pes->pts = pes->dts = pcr + 3654 + 9000;
1252 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1253 pes->dts > pcr + 10*90000) { //10sec
1254 pes->pts = pes->dts = pcr + 3654 + 9000;
1264 case MPEGTS_PAYLOAD:
1266 if (pes->data_index > 0 &&
1267 pes->data_index + buf_size > pes->total_size) {
1268 ret = new_pes_packet(pes, ts->pkt);
1271 pes->total_size = MAX_PES_PAYLOAD;
1272 pes->buffer = av_buffer_alloc(pes->total_size +
1273 AV_INPUT_BUFFER_PADDING_SIZE);
1275 return AVERROR(ENOMEM);
1277 } else if (pes->data_index == 0 &&
1278 buf_size > pes->total_size) {
1279 // pes packet size is < ts size packet and pes data is padded with 0xff
1280 // not sure if this is legal in ts but see issue #2392
1281 buf_size = pes->total_size;
1283 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1284 pes->data_index += buf_size;
1285 /* emit complete packets with known packet size
1286 * decreases demuxer delay for infrequent packets like subtitles from
1287 * a couple of seconds to milliseconds for properly muxed files.
1288 * total_size is the number of bytes following pes_packet_length
1289 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1290 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1291 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1293 ret = new_pes_packet(pes, ts->pkt);
1309 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1314 /* if no pid found, then add a pid context */
1315 pes = av_mallocz(sizeof(PESContext));
1319 pes->stream = ts->stream;
1321 pes->pcr_pid = pcr_pid;
1322 pes->state = MPEGTS_SKIP;
1323 pes->pts = AV_NOPTS_VALUE;
1324 pes->dts = AV_NOPTS_VALUE;
1325 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1334 typedef struct MP4DescrParseContext {
1338 Mp4Descr *active_descr;
1340 int max_descr_count;
1342 int predefined_SLConfigDescriptor_seen;
1343 } MP4DescrParseContext;
1345 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1346 const uint8_t *buf, unsigned size,
1347 Mp4Descr *descr, int max_descr_count)
1350 if (size > (1 << 30))
1351 return AVERROR_INVALIDDATA;
1353 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1354 NULL, NULL, NULL, NULL)) < 0)
1361 d->active_descr = NULL;
1362 d->max_descr_count = max_descr_count;
1367 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1369 int64_t new_off = avio_tell(pb);
1370 (*len) -= new_off - *off;
1374 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1377 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1380 int ret = parse_mp4_descr(d, off, len, 0);
1383 update_offsets(&d->pb, &off, &len);
1388 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1390 avio_rb16(&d->pb); // ID
1396 update_offsets(&d->pb, &off, &len);
1397 return parse_mp4_descr_arr(d, off, len);
1400 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1405 id_flags = avio_rb16(&d->pb);
1406 if (!(id_flags & 0x0020)) { // URL_Flag
1407 update_offsets(&d->pb, &off, &len);
1408 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1414 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1419 if (d->descr_count >= d->max_descr_count)
1420 return AVERROR_INVALIDDATA;
1421 ff_mp4_parse_es_descr(&d->pb, &es_id);
1422 d->active_descr = d->descr + (d->descr_count++);
1424 d->active_descr->es_id = es_id;
1425 update_offsets(&d->pb, &off, &len);
1426 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1428 update_offsets(&d->pb, &off, &len);
1430 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1431 d->active_descr = NULL;
1435 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1438 Mp4Descr *descr = d->active_descr;
1440 return AVERROR_INVALIDDATA;
1441 d->active_descr->dec_config_descr = av_malloc(len);
1442 if (!descr->dec_config_descr)
1443 return AVERROR(ENOMEM);
1444 descr->dec_config_descr_len = len;
1445 avio_read(&d->pb, descr->dec_config_descr, len);
1449 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1451 Mp4Descr *descr = d->active_descr;
1454 return AVERROR_INVALIDDATA;
1456 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1457 descr->sl.dst = avio_r8(&d->pb); \
1458 if (descr->sl.dst > maxv) { \
1459 descr->sl.dst = maxv; \
1460 return AVERROR_INVALIDDATA; \
1464 predefined = avio_r8(&d->pb);
1467 int flags = avio_r8(&d->pb);
1468 descr->sl.use_au_start = !!(flags & 0x80);
1469 descr->sl.use_au_end = !!(flags & 0x40);
1470 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1471 descr->sl.use_padding = !!(flags & 0x08);
1472 descr->sl.use_timestamps = !!(flags & 0x04);
1473 descr->sl.use_idle = !!(flags & 0x02);
1474 descr->sl.timestamp_res = avio_rb32(&d->pb);
1476 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1477 R8_CHECK_CLIP_MAX(ocr_len, 63);
1478 R8_CHECK_CLIP_MAX(au_len, 31);
1479 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1480 lengths = avio_rb16(&d->pb);
1481 descr->sl.degr_prior_len = lengths >> 12;
1482 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1483 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1484 } else if (!d->predefined_SLConfigDescriptor_seen){
1485 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1486 d->predefined_SLConfigDescriptor_seen = 1;
1491 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1495 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1498 update_offsets(&d->pb, &off, &len);
1499 if (len < 0 || len1 > len || len1 <= 0) {
1500 av_log(d->s, AV_LOG_ERROR,
1501 "Tag %x length violation new length %d bytes remaining %d\n",
1503 return AVERROR_INVALIDDATA;
1506 if (d->level++ >= MAX_LEVEL) {
1507 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1508 ret = AVERROR_INVALIDDATA;
1512 if (target_tag && tag != target_tag) {
1513 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1515 ret = AVERROR_INVALIDDATA;
1521 ret = parse_MP4IODescrTag(d, off, len1);
1524 ret = parse_MP4ODescrTag(d, off, len1);
1527 ret = parse_MP4ESDescrTag(d, off, len1);
1529 case MP4DecConfigDescrTag:
1530 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1533 ret = parse_MP4SLDescrTag(d, off, len1);
1540 avio_seek(&d->pb, off + len1, SEEK_SET);
1544 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1545 Mp4Descr *descr, int *descr_count, int max_descr_count)
1547 MP4DescrParseContext d;
1550 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1554 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1556 *descr_count = d.descr_count;
1560 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1561 Mp4Descr *descr, int *descr_count, int max_descr_count)
1563 MP4DescrParseContext d;
1566 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1570 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1572 *descr_count = d.descr_count;
1576 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1579 MpegTSContext *ts = filter->u.section_filter.opaque;
1580 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1582 const uint8_t *p, *p_end;
1584 int mp4_descr_count = 0;
1585 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1587 AVFormatContext *s = ts->stream;
1589 p_end = section + section_len - 4;
1591 if (parse_section_header(&h, &p, p_end) < 0)
1593 if (h.tid != M4OD_TID)
1595 if (skip_identical(&h, tssf))
1598 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1599 MAX_MP4_DESCR_COUNT);
1601 for (pid = 0; pid < NB_PID_MAX; pid++) {
1604 for (i = 0; i < mp4_descr_count; i++) {
1607 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1609 if (ts->pids[pid]->type != MPEGTS_PES) {
1610 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1613 pes = ts->pids[pid]->u.pes_filter.opaque;
1618 pes->sl = mp4_descr[i].sl;
1620 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1621 mp4_descr[i].dec_config_descr_len, 0,
1622 NULL, NULL, NULL, NULL);
1623 ff_mp4_read_dec_config_descr(s, st, &pb);
1624 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1625 st->codecpar->extradata_size > 0)
1626 st->need_parsing = 0;
1627 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1628 st->codecpar->extradata_size > 0)
1629 st->need_parsing = 0;
1631 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1632 st->internal->need_context_update = 1;
1635 for (i = 0; i < mp4_descr_count; i++)
1636 av_free(mp4_descr[i].dec_config_descr);
1639 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1642 AVProgram *prg = NULL;
1643 MpegTSContext *ts = filter->u.section_filter.opaque;
1645 int idx = ff_find_stream_index(ts->stream, filter->pid);
1649 new_data_packet(section, section_len, ts->pkt);
1650 ts->pkt->stream_index = idx;
1651 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1652 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1653 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1654 if (f && f->last_pcr != -1)
1655 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1661 static const uint8_t opus_coupled_stream_cnt[9] = {
1662 1, 0, 1, 1, 2, 2, 2, 3, 3
1665 static const uint8_t opus_stream_cnt[9] = {
1666 1, 1, 1, 2, 2, 3, 4, 4, 5,
1669 static const uint8_t opus_channel_map[8][8] = {
1677 { 0,6,1,2,3,4,5,7 },
1680 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1681 const uint8_t **pp, const uint8_t *desc_list_end,
1682 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1685 const uint8_t *desc_end;
1686 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1690 desc_tag = get8(pp, desc_list_end);
1692 return AVERROR_INVALIDDATA;
1693 desc_len = get8(pp, desc_list_end);
1695 return AVERROR_INVALIDDATA;
1696 desc_end = *pp + desc_len;
1697 if (desc_end > desc_list_end)
1698 return AVERROR_INVALIDDATA;
1700 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1702 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1703 stream_type == STREAM_TYPE_PRIVATE_DATA)
1704 mpegts_find_stream_type(st, desc_tag, DESC_types);
1707 case 0x02: /* video stream descriptor */
1708 if (get8(pp, desc_end) & 0x1) {
1709 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1712 case 0x1E: /* SL descriptor */
1713 desc_es_id = get16(pp, desc_end);
1716 if (ts && ts->pids[pid])
1717 ts->pids[pid]->es_id = desc_es_id;
1718 for (i = 0; i < mp4_descr_count; i++)
1719 if (mp4_descr[i].dec_config_descr_len &&
1720 mp4_descr[i].es_id == desc_es_id) {
1722 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1723 mp4_descr[i].dec_config_descr_len, 0,
1724 NULL, NULL, NULL, NULL);
1725 ff_mp4_read_dec_config_descr(fc, st, &pb);
1726 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1727 st->codecpar->extradata_size > 0) {
1728 st->need_parsing = 0;
1729 st->internal->need_context_update = 1;
1731 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1732 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1735 case 0x1F: /* FMC descriptor */
1736 if (get16(pp, desc_end) < 0)
1738 if (mp4_descr_count > 0 &&
1739 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1740 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1741 st->request_probe > 0) &&
1742 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1744 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1745 mp4_descr->dec_config_descr_len, 0,
1746 NULL, NULL, NULL, NULL);
1747 ff_mp4_read_dec_config_descr(fc, st, &pb);
1748 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1749 st->codecpar->extradata_size > 0) {
1750 st->request_probe = st->need_parsing = 0;
1751 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1752 st->internal->need_context_update = 1;
1756 case 0x56: /* DVB teletext descriptor */
1758 uint8_t *extradata = NULL;
1759 int language_count = desc_len / 5;
1761 if (desc_len > 0 && desc_len % 5 != 0)
1762 return AVERROR_INVALIDDATA;
1764 if (language_count > 0) {
1765 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1766 av_assert0(language_count <= sizeof(language) / 4);
1768 if (st->codecpar->extradata == NULL) {
1769 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1770 return AVERROR(ENOMEM);
1774 if (st->codecpar->extradata_size < language_count * 2)
1775 return AVERROR_INVALIDDATA;
1777 extradata = st->codecpar->extradata;
1779 for (i = 0; i < language_count; i++) {
1780 language[i * 4 + 0] = get8(pp, desc_end);
1781 language[i * 4 + 1] = get8(pp, desc_end);
1782 language[i * 4 + 2] = get8(pp, desc_end);
1783 language[i * 4 + 3] = ',';
1785 memcpy(extradata, *pp, 2);
1791 language[i * 4 - 1] = 0;
1792 av_dict_set(&st->metadata, "language", language, 0);
1793 st->internal->need_context_update = 1;
1797 case 0x59: /* subtitling descriptor */
1799 /* 8 bytes per DVB subtitle substream data:
1800 * ISO_639_language_code (3 bytes),
1801 * subtitling_type (1 byte),
1802 * composition_page_id (2 bytes),
1803 * ancillary_page_id (2 bytes) */
1804 int language_count = desc_len / 8;
1806 if (desc_len > 0 && desc_len % 8 != 0)
1807 return AVERROR_INVALIDDATA;
1809 if (language_count > 1) {
1810 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1813 if (language_count > 0) {
1816 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1817 av_assert0(language_count <= sizeof(language) / 4);
1819 if (st->codecpar->extradata == NULL) {
1820 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1821 return AVERROR(ENOMEM);
1825 if (st->codecpar->extradata_size < language_count * 5)
1826 return AVERROR_INVALIDDATA;
1828 extradata = st->codecpar->extradata;
1830 for (i = 0; i < language_count; i++) {
1831 language[i * 4 + 0] = get8(pp, desc_end);
1832 language[i * 4 + 1] = get8(pp, desc_end);
1833 language[i * 4 + 2] = get8(pp, desc_end);
1834 language[i * 4 + 3] = ',';
1836 /* hearing impaired subtitles detection using subtitling_type */
1838 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1839 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1840 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1841 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1842 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1843 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1844 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1848 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1849 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1855 language[i * 4 - 1] = 0;
1856 av_dict_set(&st->metadata, "language", language, 0);
1857 st->internal->need_context_update = 1;
1861 case 0x0a: /* ISO 639 language descriptor */
1862 for (i = 0; i + 4 <= desc_len; i += 4) {
1863 language[i + 0] = get8(pp, desc_end);
1864 language[i + 1] = get8(pp, desc_end);
1865 language[i + 2] = get8(pp, desc_end);
1866 language[i + 3] = ',';
1867 switch (get8(pp, desc_end)) {
1869 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1872 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1875 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1876 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1880 if (i && language[0]) {
1881 language[i - 1] = 0;
1882 /* don't overwrite language, as it may already have been set by
1883 * another, more specific descriptor (e.g. supplementary audio) */
1884 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1887 case 0x05: /* registration descriptor */
1888 st->codecpar->codec_tag = bytestream_get_le32(pp);
1889 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1890 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1891 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1892 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1893 st->request_probe = 50;
1896 case 0x52: /* stream identifier descriptor */
1897 st->stream_identifier = 1 + get8(pp, desc_end);
1899 case 0x26: /* metadata descriptor */
1900 if (get16(pp, desc_end) == 0xFFFF)
1902 if (get8(pp, desc_end) == 0xFF) {
1903 st->codecpar->codec_tag = bytestream_get_le32(pp);
1904 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1905 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1908 case 0x7f: /* DVB extension descriptor */
1909 ext_desc_tag = get8(pp, desc_end);
1910 if (ext_desc_tag < 0)
1911 return AVERROR_INVALIDDATA;
1912 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1913 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1914 if (!st->codecpar->extradata) {
1915 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1916 AV_INPUT_BUFFER_PADDING_SIZE);
1917 if (!st->codecpar->extradata)
1918 return AVERROR(ENOMEM);
1920 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1921 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1923 channel_config_code = get8(pp, desc_end);
1924 if (channel_config_code < 0)
1925 return AVERROR_INVALIDDATA;
1926 if (channel_config_code <= 0x8) {
1927 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1928 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1929 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1930 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1931 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1933 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1935 st->need_parsing = AVSTREAM_PARSE_FULL;
1936 st->internal->need_context_update = 1;
1939 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
1943 return AVERROR_INVALIDDATA;
1944 flags = get8(pp, desc_end);
1946 if ((flags & 0x80) == 0) /* mix_type */
1947 st->disposition |= AV_DISPOSITION_DEPENDENT;
1949 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
1951 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1952 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1955 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1958 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1962 if (flags & 0x01) { /* language_code_present */
1964 return AVERROR_INVALIDDATA;
1965 language[0] = get8(pp, desc_end);
1966 language[1] = get8(pp, desc_end);
1967 language[2] = get8(pp, desc_end);
1970 /* This language always has to override a possible
1971 * ISO 639 language descriptor language */
1973 av_dict_set(&st->metadata, "language", language, 0);
1977 case 0x6a: /* ac-3_descriptor */
1979 int component_type_flag = get8(pp, desc_end) & (1 << 7);
1980 if (component_type_flag) {
1981 int component_type = get8(pp, desc_end);
1982 int service_type_mask = 0x38; // 0b00111000
1983 int service_type = ((component_type & service_type_mask) >> 3);
1984 if (service_type == 0x02 /* 0b010 */) {
1985 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1986 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
1991 case 0x7a: /* enhanced_ac-3_descriptor */
1993 int component_type_flag = get8(pp, desc_end) & (1 << 7);
1994 if (component_type_flag) {
1995 int component_type = get8(pp, desc_end);
1996 int service_type_mask = 0x38; // 0b00111000
1997 int service_type = ((component_type & service_type_mask) >> 3);
1998 if (service_type == 0x02 /* 0b010 */) {
1999 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2000 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2012 static AVStream *find_matching_stream(MpegTSContext *ts, int pid,
2013 int stream_identifier, int pmt_stream_idx)
2015 AVFormatContext *s = ts->stream;
2017 AVStream *found = NULL;
2019 for (i = 0; i < s->nb_streams; i++) {
2020 AVStream *st = s->streams[i];
2021 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2022 if (st->stream_identifier == stream_identifier+1) {
2026 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2033 av_log(ts->stream, AV_LOG_VERBOSE,
2034 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2035 av_get_media_type_string(found->codecpar->codec_type),
2042 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2044 const uint8_t **pp = &p;
2045 const uint8_t *desc_list_end;
2046 const uint8_t *desc_end;
2048 int desc_len, desc_tag;
2050 desc_list_len = get16(pp, p_end);
2051 if (desc_list_len < 0)
2053 desc_list_len &= 0xfff;
2054 desc_list_end = p + desc_list_len;
2055 if (desc_list_end > p_end)
2059 desc_tag = get8(pp, desc_list_end);
2062 desc_len = get8(pp, desc_list_end);
2065 desc_end = *pp + desc_len;
2066 if (desc_end > desc_list_end)
2069 if (desc_tag == 0x52) {
2070 return get8(pp, desc_end);
2078 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2080 return !(stream_type == 0x13 ||
2081 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2084 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2086 MpegTSContext *ts = filter->u.section_filter.opaque;
2087 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2088 SectionHeader h1, *h = &h1;
2091 const uint8_t *p, *p_end, *desc_list_end;
2092 int program_info_length, pcr_pid, pid, stream_type;
2094 uint32_t prog_reg_desc = 0; /* registration descriptor */
2095 int stream_identifier = -1;
2097 int mp4_descr_count = 0;
2098 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2101 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2102 hex_dump_debug(ts->stream, section, section_len);
2104 p_end = section + section_len - 4;
2106 if (parse_section_header(h, &p, p_end) < 0)
2108 if (h->tid != PMT_TID)
2110 if (skip_identical(h, tssf))
2113 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2114 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2116 if (!ts->scan_all_pmts && ts->skip_changes)
2119 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2121 if (!ts->skip_clear)
2122 clear_program(ts, h->id);
2124 pcr_pid = get16(&p, p_end);
2128 add_pid_to_pmt(ts, h->id, pcr_pid);
2129 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2131 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2133 program_info_length = get16(&p, p_end);
2134 if (program_info_length < 0)
2136 program_info_length &= 0xfff;
2137 while (program_info_length >= 2) {
2139 tag = get8(&p, p_end);
2140 len = get8(&p, p_end);
2142 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2144 if (len > program_info_length - 2)
2145 // something else is broken, exit the program_descriptors_loop
2147 program_info_length -= len + 2;
2148 if (tag == 0x1d) { // IOD descriptor
2149 get8(&p, p_end); // scope
2150 get8(&p, p_end); // label
2152 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2153 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2154 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2155 prog_reg_desc = bytestream_get_le32(&p);
2160 p += program_info_length;
2164 // stop parsing after pmt, we found header
2165 if (!ts->stream->nb_streams)
2168 set_pmt_found(ts, h->id);
2171 for (i = 0; ; i++) {
2174 stream_type = get8(&p, p_end);
2175 if (stream_type < 0)
2177 pid = get16(&p, p_end);
2181 if (pid == ts->current_pid)
2184 if (ts->merge_pmt_versions)
2185 stream_identifier = parse_stream_identifier_desc(p, p_end);
2187 /* now create stream */
2188 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2189 pes = ts->pids[pid]->u.pes_filter.opaque;
2190 if (ts->merge_pmt_versions && !pes->st) {
2191 st = find_matching_stream(ts, pid, stream_identifier, i);
2194 pes->stream_type = stream_type;
2199 pes->st = avformat_new_stream(pes->stream, NULL);
2202 pes->st->id = pes->pid;
2203 pes->st->program_num = h->id;
2204 pes->st->pmt_version = h->version;
2205 pes->st->pmt_stream_idx = i;
2208 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2210 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2211 pes = add_pes_stream(ts, pid, pcr_pid);
2212 if (ts->merge_pmt_versions && pes && !pes->st) {
2213 st = find_matching_stream(ts, pid, stream_identifier, i);
2216 pes->stream_type = stream_type;
2220 if (pes && !pes->st) {
2221 st = avformat_new_stream(pes->stream, NULL);
2225 st->program_num = h->id;
2226 st->pmt_version = h->version;
2227 st->pmt_stream_idx = i;
2230 int idx = ff_find_stream_index(ts->stream, pid);
2232 st = ts->stream->streams[idx];
2234 if (ts->merge_pmt_versions && !st) {
2235 st = find_matching_stream(ts, pid, stream_identifier, i);
2238 st = avformat_new_stream(ts->stream, NULL);
2242 st->program_num = h->id;
2243 st->pmt_version = h->version;
2244 st->pmt_stream_idx = i;
2245 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2246 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2247 mpegts_find_stream_type(st, stream_type, SCTE_types);
2248 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2256 if (pes && !pes->stream_type)
2257 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2259 add_pid_to_pmt(ts, h->id, pid);
2261 av_program_add_stream_index(ts->stream, h->id, st->index);
2263 desc_list_len = get16(&p, p_end);
2264 if (desc_list_len < 0)
2266 desc_list_len &= 0xfff;
2267 desc_list_end = p + desc_list_len;
2268 if (desc_list_end > p_end)
2271 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2272 desc_list_end, mp4_descr,
2273 mp4_descr_count, pid, ts) < 0)
2276 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2277 stream_type == 0x83 && pes->sub_st) {
2278 av_program_add_stream_index(ts->stream, h->id,
2279 pes->sub_st->index);
2280 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2286 if (!ts->pids[pcr_pid])
2287 mpegts_open_pcr_filter(ts, pcr_pid);
2290 for (i = 0; i < mp4_descr_count; i++)
2291 av_free(mp4_descr[i].dec_config_descr);
2294 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2296 MpegTSContext *ts = filter->u.section_filter.opaque;
2297 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2298 SectionHeader h1, *h = &h1;
2299 const uint8_t *p, *p_end;
2303 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2304 hex_dump_debug(ts->stream, section, section_len);
2306 p_end = section + section_len - 4;
2308 if (parse_section_header(h, &p, p_end) < 0)
2310 if (h->tid != PAT_TID)
2312 if (ts->skip_changes)
2315 if (skip_identical(h, tssf))
2317 ts->stream->ts_id = h->id;
2321 sid = get16(&p, p_end);
2324 pmt_pid = get16(&p, p_end);
2329 if (pmt_pid == ts->current_pid)
2332 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2334 if (sid == 0x0000) {
2337 MpegTSFilter *fil = ts->pids[pmt_pid];
2338 program = av_new_program(ts->stream, sid);
2340 program->program_num = sid;
2341 program->pmt_pid = pmt_pid;
2344 if ( fil->type != MPEGTS_SECTION
2345 || fil->pid != pmt_pid
2346 || fil->u.section_filter.section_cb != pmt_cb)
2347 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2349 if (!ts->pids[pmt_pid])
2350 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2351 add_pat_entry(ts, sid);
2352 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2353 add_pid_to_pmt(ts, sid, pmt_pid);
2359 for (j=0; j<ts->stream->nb_programs; j++) {
2360 for (i = 0; i < ts->nb_prg; i++)
2361 if (ts->prg[i].id == ts->stream->programs[j]->id)
2363 if (i==ts->nb_prg && !ts->skip_clear)
2364 clear_avprogram(ts, ts->stream->programs[j]->id);
2369 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2371 MpegTSContext *ts = filter->u.section_filter.opaque;
2372 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2373 SectionHeader h1, *h = &h1;
2374 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2375 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2376 char *name, *provider_name;
2378 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2379 hex_dump_debug(ts->stream, section, section_len);
2381 p_end = section + section_len - 4;
2383 if (parse_section_header(h, &p, p_end) < 0)
2385 if (h->tid != SDT_TID)
2387 if (ts->skip_changes)
2389 if (skip_identical(h, tssf))
2392 onid = get16(&p, p_end);
2395 val = get8(&p, p_end);
2399 sid = get16(&p, p_end);
2402 val = get8(&p, p_end);
2405 desc_list_len = get16(&p, p_end);
2406 if (desc_list_len < 0)
2408 desc_list_len &= 0xfff;
2409 desc_list_end = p + desc_list_len;
2410 if (desc_list_end > p_end)
2413 desc_tag = get8(&p, desc_list_end);
2416 desc_len = get8(&p, desc_list_end);
2417 desc_end = p + desc_len;
2418 if (desc_len < 0 || desc_end > desc_list_end)
2421 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2422 desc_tag, desc_len);
2426 service_type = get8(&p, p_end);
2427 if (service_type < 0)
2429 provider_name = getstr8(&p, p_end);
2432 name = getstr8(&p, p_end);
2434 AVProgram *program = av_new_program(ts->stream, sid);
2436 av_dict_set(&program->metadata, "service_name", name, 0);
2437 av_dict_set(&program->metadata, "service_provider",
2442 av_free(provider_name);
2453 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2454 const uint8_t *packet);
2456 /* handle one TS packet */
2457 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2460 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2461 has_adaptation, has_payload;
2462 const uint8_t *p, *p_end;
2465 pid = AV_RB16(packet + 1) & 0x1fff;
2466 if (pid && discard_pid(ts, pid))
2468 is_start = packet[1] & 0x40;
2469 tss = ts->pids[pid];
2470 if (ts->auto_guess && !tss && is_start) {
2471 add_pes_stream(ts, pid, -1);
2472 tss = ts->pids[pid];
2476 ts->current_pid = pid;
2478 afc = (packet[3] >> 4) & 3;
2479 if (afc == 0) /* reserved value */
2481 has_adaptation = afc & 2;
2482 has_payload = afc & 1;
2483 is_discontinuity = has_adaptation &&
2484 packet[4] != 0 && /* with length > 0 */
2485 (packet[5] & 0x80); /* and discontinuity indicated */
2487 /* continuity check (currently not used) */
2488 cc = (packet[3] & 0xf);
2489 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2490 cc_ok = pid == 0x1FFF || // null packet PID
2497 av_log(ts->stream, AV_LOG_DEBUG,
2498 "Continuity check failed for pid %d expected %d got %d\n",
2499 pid, expected_cc, cc);
2500 if (tss->type == MPEGTS_PES) {
2501 PESContext *pc = tss->u.pes_filter.opaque;
2502 pc->flags |= AV_PKT_FLAG_CORRUPT;
2506 if (packet[1] & 0x80) {
2507 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2508 if (tss->type == MPEGTS_PES) {
2509 PESContext *pc = tss->u.pes_filter.opaque;
2510 pc->flags |= AV_PKT_FLAG_CORRUPT;
2515 if (has_adaptation) {
2518 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2519 tss->last_pcr = pcr_h * 300 + pcr_l;
2520 /* skip adaptation field */
2523 /* if past the end of packet, ignore */
2524 p_end = packet + TS_PACKET_SIZE;
2525 if (p >= p_end || !has_payload)
2528 pos = avio_tell(ts->stream->pb);
2530 av_assert0(pos >= TS_PACKET_SIZE);
2531 ts->pos47_full = pos - TS_PACKET_SIZE;
2534 if (tss->type == MPEGTS_SECTION) {
2536 /* pointer field present */
2538 if (len > p_end - p)
2541 /* write remaining section bytes */
2542 write_section_data(ts, tss,
2544 /* check whether filter has been closed */
2550 write_section_data(ts, tss,
2555 write_section_data(ts, tss,
2560 // stop find_stream_info from waiting for more streams
2561 // when all programs have received a PMT
2562 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2564 for (i = 0; i < ts->nb_prg; i++) {
2565 if (!ts->prg[i].pmt_found)
2568 if (i == ts->nb_prg && ts->nb_prg > 0) {
2570 for (i = 0; i < ts->stream->nb_streams; i++) {
2571 AVStream *st = ts->stream->streams[i];
2572 if (st->codecpar->codec_type >= 0)
2573 types |= 1<<st->codecpar->codec_type;
2575 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2576 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2577 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2584 // Note: The position here points actually behind the current packet.
2585 if (tss->type == MPEGTS_PES) {
2586 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2587 pos - ts->raw_packet_size)) < 0)
2595 static void reanalyze(MpegTSContext *ts) {
2596 AVIOContext *pb = ts->stream->pb;
2597 int64_t pos = avio_tell(pb);
2600 pos -= ts->pos47_full;
2601 if (pos == TS_PACKET_SIZE) {
2602 ts->size_stat[0] ++;
2603 } else if (pos == TS_DVHS_PACKET_SIZE) {
2604 ts->size_stat[1] ++;
2605 } else if (pos == TS_FEC_PACKET_SIZE) {
2606 ts->size_stat[2] ++;
2609 ts->size_stat_count ++;
2610 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2612 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2613 newsize = TS_PACKET_SIZE;
2614 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2615 newsize = TS_DVHS_PACKET_SIZE;
2616 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2617 newsize = TS_FEC_PACKET_SIZE;
2619 if (newsize && newsize != ts->raw_packet_size) {
2620 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2621 ts->raw_packet_size = newsize;
2623 ts->size_stat_count = 0;
2624 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2628 /* XXX: try to find a better synchro over several packets (use
2629 * get_packet_size() ?) */
2630 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2632 MpegTSContext *ts = s->priv_data;
2633 AVIOContext *pb = s->pb;
2635 uint64_t pos = avio_tell(pb);
2637 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2639 //Special case for files like 01c56b0dc1.ts
2640 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2641 avio_seek(pb, 12, SEEK_CUR);
2645 for (i = 0; i < ts->resync_size; i++) {
2650 avio_seek(pb, -1, SEEK_CUR);
2651 reanalyze(s->priv_data);
2655 av_log(s, AV_LOG_ERROR,
2656 "max resync size reached, could not find sync byte\n");
2658 return AVERROR_INVALIDDATA;
2661 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2662 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2663 const uint8_t **data)
2665 AVIOContext *pb = s->pb;
2669 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2670 if (len != TS_PACKET_SIZE)
2671 return len < 0 ? len : AVERROR_EOF;
2672 /* check packet sync byte */
2673 if ((*data)[0] != 0x47) {
2674 /* find a new packet start */
2676 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2677 return AVERROR(EAGAIN);
2687 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2689 AVIOContext *pb = s->pb;
2690 int skip = raw_packet_size - TS_PACKET_SIZE;
2692 avio_skip(pb, skip);
2695 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2697 AVFormatContext *s = ts->stream;
2698 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2699 const uint8_t *data;
2703 if (avio_tell(s->pb) != ts->last_pos) {
2705 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2706 /* seek detected, flush pes buffer */
2707 for (i = 0; i < NB_PID_MAX; i++) {
2709 if (ts->pids[i]->type == MPEGTS_PES) {
2710 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2711 av_buffer_unref(&pes->buffer);
2712 pes->data_index = 0;
2713 pes->state = MPEGTS_SKIP; /* skip until pes header */
2714 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2715 ts->pids[i]->u.section_filter.last_ver = -1;
2717 ts->pids[i]->last_cc = -1;
2718 ts->pids[i]->last_pcr = -1;
2725 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2728 if (nb_packets != 0 && packet_num >= nb_packets ||
2729 ts->stop_parse > 1) {
2730 ret = AVERROR(EAGAIN);
2733 if (ts->stop_parse > 0)
2736 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2739 ret = handle_packet(ts, data);
2740 finished_reading_packet(s, ts->raw_packet_size);
2744 ts->last_pos = avio_tell(s->pb);
2748 static int mpegts_probe(AVProbeData *p)
2750 const int size = p->buf_size;
2754 int check_count = size / TS_FEC_PACKET_SIZE;
2755 #define CHECK_COUNT 10
2756 #define CHECK_BLOCK 100
2761 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2762 int left = FFMIN(check_count - i, CHECK_BLOCK);
2763 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2764 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2765 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2766 score = FFMAX3(score, dvhs_score, fec_score);
2768 maxscore = FFMAX(maxscore, score);
2771 sumscore = sumscore * CHECK_COUNT / check_count;
2772 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2774 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2776 if (check_count > CHECK_COUNT && sumscore > 6) {
2777 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2778 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2779 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2780 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2781 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2782 } else if (sumscore > 6) {
2789 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2790 * (-1) if not available */
2791 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2793 int afc, len, flags;
2797 afc = (packet[3] >> 4) & 3;
2799 return AVERROR_INVALIDDATA;
2804 return AVERROR_INVALIDDATA;
2807 if (!(flags & 0x10))
2808 return AVERROR_INVALIDDATA;
2810 return AVERROR_INVALIDDATA;
2812 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2813 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2817 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2819 /* NOTE: We attempt to seek on non-seekable files as well, as the
2820 * probe buffer usually is big enough. Only warn if the seek failed
2821 * on files where the seek should work. */
2822 if (avio_seek(pb, pos, SEEK_SET) < 0)
2823 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2826 static int mpegts_read_header(AVFormatContext *s)
2828 MpegTSContext *ts = s->priv_data;
2829 AVIOContext *pb = s->pb;
2830 uint8_t buf[8 * 1024] = {0};
2832 int64_t pos, probesize = s->probesize;
2834 s->internal->prefer_codec_framerate = 1;
2836 if (ffio_ensure_seekback(pb, probesize) < 0)
2837 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2839 /* read the first 8192 bytes to get packet size */
2840 pos = avio_tell(pb);
2841 len = avio_read(pb, buf, sizeof(buf));
2842 ts->raw_packet_size = get_packet_size(buf, len);
2843 if (ts->raw_packet_size <= 0) {
2844 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2845 ts->raw_packet_size = TS_PACKET_SIZE;
2850 if (s->iformat == &ff_mpegts_demuxer) {
2853 /* first do a scan to get all the services */
2854 seek_back(s, pb, pos);
2856 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2858 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2860 handle_packets(ts, probesize / ts->raw_packet_size);
2861 /* if could not find service, enable auto_guess */
2865 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2867 s->ctx_flags |= AVFMTCTX_NOHEADER;
2870 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2871 int64_t pcrs[2], pcr_h;
2872 int packet_count[2];
2873 uint8_t packet[TS_PACKET_SIZE];
2874 const uint8_t *data;
2876 /* only read packets */
2878 st = avformat_new_stream(s, NULL);
2880 return AVERROR(ENOMEM);
2881 avpriv_set_pts_info(st, 60, 1, 27000000);
2882 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2883 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2885 /* we iterate until we find two PCRs to estimate the bitrate */
2890 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2893 pid = AV_RB16(data + 1) & 0x1fff;
2894 if ((pcr_pid == -1 || pcr_pid == pid) &&
2895 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2896 finished_reading_packet(s, ts->raw_packet_size);
2898 packet_count[nb_pcrs] = nb_packets;
2899 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2902 if (pcrs[1] - pcrs[0] > 0) {
2903 /* the difference needs to be positive to make sense for bitrate computation */
2906 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2908 packet_count[0] = packet_count[1];
2913 finished_reading_packet(s, ts->raw_packet_size);
2918 /* NOTE1: the bitrate is computed without the FEC */
2919 /* NOTE2: it is only the bitrate of the start of the stream */
2920 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2921 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2922 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2923 st->codecpar->bit_rate = s->bit_rate;
2924 st->start_time = ts->cur_pcr;
2925 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2926 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2929 seek_back(s, pb, pos);
2933 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2935 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2937 MpegTSContext *ts = s->priv_data;
2939 int64_t pcr_h, next_pcr_h, pos;
2940 int pcr_l, next_pcr_l;
2941 uint8_t pcr_buf[12];
2942 const uint8_t *data;
2944 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2945 return AVERROR(ENOMEM);
2946 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2947 pkt->pos = avio_tell(s->pb);
2949 av_packet_unref(pkt);
2952 if (data != pkt->data)
2953 memcpy(pkt->data, data, ts->raw_packet_size);
2954 finished_reading_packet(s, ts->raw_packet_size);
2955 if (ts->mpeg2ts_compute_pcr) {
2956 /* compute exact PCR for each packet */
2957 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2958 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2959 pos = avio_tell(s->pb);
2960 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2961 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2962 avio_read(s->pb, pcr_buf, 12);
2963 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2964 /* XXX: not precise enough */
2966 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2971 avio_seek(s->pb, pos, SEEK_SET);
2972 /* no next PCR found: we use previous increment */
2973 ts->cur_pcr = pcr_h * 300 + pcr_l;
2975 pkt->pts = ts->cur_pcr;
2976 pkt->duration = ts->pcr_incr;
2977 ts->cur_pcr += ts->pcr_incr;
2979 pkt->stream_index = 0;
2983 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2985 MpegTSContext *ts = s->priv_data;
2990 ret = handle_packets(ts, 0);
2992 av_packet_unref(ts->pkt);
2993 /* flush pes data left */
2994 for (i = 0; i < NB_PID_MAX; i++)
2995 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2996 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2997 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2998 ret = new_pes_packet(pes, pkt);
3001 pes->state = MPEGTS_SKIP;
3008 if (!ret && pkt->size < 0)
3009 ret = AVERROR_INVALIDDATA;
3013 static void mpegts_free(MpegTSContext *ts)
3019 for (i = 0; i < NB_PID_MAX; i++)
3021 mpegts_close_filter(ts, ts->pids[i]);
3024 static int mpegts_read_close(AVFormatContext *s)
3026 MpegTSContext *ts = s->priv_data;
3031 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3032 int64_t *ppos, int64_t pos_limit)
3034 MpegTSContext *ts = s->priv_data;
3035 int64_t pos, timestamp;
3036 uint8_t buf[TS_PACKET_SIZE];
3037 int pcr_l, pcr_pid =
3038 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3039 int pos47 = ts->pos47_full % ts->raw_packet_size;
3041 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3042 ts->raw_packet_size + pos47;
3043 while(pos < pos_limit) {
3044 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3045 return AV_NOPTS_VALUE;
3046 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3047 return AV_NOPTS_VALUE;
3048 if (buf[0] != 0x47) {
3049 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3050 return AV_NOPTS_VALUE;
3051 pos = avio_tell(s->pb);
3054 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3055 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3059 pos += ts->raw_packet_size;
3062 return AV_NOPTS_VALUE;
3065 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3066 int64_t *ppos, int64_t pos_limit)
3068 MpegTSContext *ts = s->priv_data;
3070 int pos47 = ts->pos47_full % ts->raw_packet_size;
3071 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3072 ff_read_frame_flush(s);
3073 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3074 return AV_NOPTS_VALUE;
3075 while(pos < pos_limit) {
3078 av_init_packet(&pkt);
3079 ret = av_read_frame(s, &pkt);
3081 return AV_NOPTS_VALUE;
3082 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3083 ff_reduce_index(s, pkt.stream_index);
3084 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3085 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3086 int64_t dts = pkt.dts;
3088 av_packet_unref(&pkt);
3093 av_packet_unref(&pkt);
3096 return AV_NOPTS_VALUE;
3099 /**************************************************************/
3100 /* parsing functions - called from other demuxers such as RTP */
3102 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3106 ts = av_mallocz(sizeof(MpegTSContext));
3109 /* no stream case, currently used by RTP */
3110 ts->raw_packet_size = TS_PACKET_SIZE;
3113 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3114 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3119 /* return the consumed length if a packet was output, or -1 if no
3120 * packet is output */
3121 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3122 const uint8_t *buf, int len)
3130 if (len < TS_PACKET_SIZE)
3131 return AVERROR_INVALIDDATA;
3132 if (buf[0] != 0x47) {
3136 handle_packet(ts, buf);
3137 buf += TS_PACKET_SIZE;
3138 len -= TS_PACKET_SIZE;
3139 if (ts->stop_parse == 1)
3146 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3152 AVInputFormat ff_mpegts_demuxer = {
3154 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3155 .priv_data_size = sizeof(MpegTSContext),
3156 .read_probe = mpegts_probe,
3157 .read_header = mpegts_read_header,
3158 .read_packet = mpegts_read_packet,
3159 .read_close = mpegts_read_close,
3160 .read_timestamp = mpegts_get_dts,
3161 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3162 .priv_class = &mpegts_class,
3165 AVInputFormat ff_mpegtsraw_demuxer = {
3166 .name = "mpegtsraw",
3167 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3168 .priv_data_size = sizeof(MpegTSContext),
3169 .read_header = mpegts_read_header,
3170 .read_packet = mpegts_raw_read_packet,
3171 .read_close = mpegts_read_close,
3172 .read_timestamp = mpegts_get_dts,
3173 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3174 .priv_class = &mpegtsraw_class,