FFmpeg  4.0.3
mpegts.c
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1 /*
2  * MPEG-2 transport stream (aka DVB) demuxer
3  * Copyright (c) 2002-2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
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"
34 #include "avformat.h"
35 #include "mpegts.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "mpeg.h"
39 #include "isom.h"
40 
41 /* maximum size in which we look for synchronization if
42  * synchronization is lost */
43 #define MAX_RESYNC_SIZE 65536
44 
45 #define MAX_PES_PAYLOAD 200 * 1024
46 
47 #define MAX_MP4_DESCR_COUNT 16
48 
49 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
50  do { \
51  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52  (modulus) = (dividend) % (divisor); \
53  (prev_dividend) = (dividend); \
54  } while (0)
55 
60 };
61 
62 typedef struct MpegTSFilter MpegTSFilter;
63 
64 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65  int is_start, int64_t pos);
66 
67 typedef struct MpegTSPESFilter {
69  void *opaque;
71 
72 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
73 
74 typedef void SetServiceCallback (void *opaque, int ret);
75 
76 typedef struct MpegTSSectionFilter {
79  int last_ver;
80  unsigned crc;
81  unsigned last_crc;
83  unsigned int check_crc : 1;
84  unsigned int end_of_section_reached : 1;
86  void *opaque;
88 
89 struct MpegTSFilter {
90  int pid;
91  int es_id;
92  int last_cc; /* last cc code (-1 if first packet) */
93  int64_t last_pcr;
95  union {
98  } u;
99 };
100 
101 #define MAX_PIDS_PER_PROGRAM 64
102 struct Program {
103  unsigned int id; // program id/service id
104  unsigned int nb_pids;
105  unsigned int pids[MAX_PIDS_PER_PROGRAM];
106 
107  /** have we found pmt for this program */
109 };
110 
112  const AVClass *class;
113  /* user data */
115  /** raw packet size, including FEC if present */
117 
118  int size_stat[3];
120 #define SIZE_STAT_THRESHOLD 10
121 
122  int64_t pos47_full;
123 
124  /** if true, all pids are analyzed to find streams */
126 
127  /** compute exact PCR for each transport stream packet */
129 
130  /** fix dvb teletext pts */
132 
133  int64_t cur_pcr; /**< used to estimate the exact PCR */
134  int pcr_incr; /**< used to estimate the exact PCR */
135 
136  /* data needed to handle file based ts */
137  /** stop parsing loop */
139  /** packet containing Audio/Video data */
141  /** to detect seek */
142  int64_t last_pos;
143 
146 
148 
150 
151  /******************************************/
152  /* private mpegts data */
153  /* scan context */
154  /** structure to keep track of Program->pids mapping */
155  unsigned int nb_prg;
156  struct Program *prg;
157 
158  int8_t crc_validity[NB_PID_MAX];
159  /** filters for various streams specified by PMT + for the PAT and PMT */
162 };
163 
164 #define MPEGTS_OPTIONS \
165  { "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 }
166 
167 static const AVOption options[] = {
169  {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
170  {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
171  {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
173  {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
174  {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
175  {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
176  {.i64 = 0}, 0, 1, 0 },
177  {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
178  {.i64 = 0}, 0, 1, 0 },
179  { NULL },
180 };
181 
182 static const AVClass mpegts_class = {
183  .class_name = "mpegts demuxer",
184  .item_name = av_default_item_name,
185  .option = options,
186  .version = LIBAVUTIL_VERSION_INT,
187 };
188 
189 static const AVOption raw_options[] = {
191  { "compute_pcr", "compute exact PCR for each transport stream packet",
192  offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
193  { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
194  { "ts_packetsize", "output option carrying the raw packet size",
195  offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
196  { .i64 = 0 }, 0, 0,
198  { NULL },
199 };
200 
201 static const AVClass mpegtsraw_class = {
202  .class_name = "mpegtsraw demuxer",
203  .item_name = av_default_item_name,
204  .option = raw_options,
205  .version = LIBAVUTIL_VERSION_INT,
206 };
207 
208 /* TS stream handling */
209 
216 };
217 
218 /* enough for PES header + length */
219 #define PES_START_SIZE 6
220 #define PES_HEADER_SIZE 9
221 #define MAX_PES_HEADER_SIZE (9 + 255)
222 
223 typedef struct PESContext {
224  int pid;
225  int pcr_pid; /**< if -1 then all packets containing PCR are considered */
230  AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
232  /* used to get the format */
234  int flags; /**< copied to the AVPacket flags */
239  int64_t pts, dts;
240  int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
244 } PESContext;
245 
247 
248 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
249 {
250  int i;
251  for (i = 0; i < ts->nb_prg; i++) {
252  if (ts->prg[i].id == programid) {
253  return &ts->prg[i];
254  }
255  }
256  return NULL;
257 }
258 
259 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
260 {
261  AVProgram *prg = NULL;
262  int i;
263 
264  for (i = 0; i < ts->stream->nb_programs; i++)
265  if (ts->stream->programs[i]->id == programid) {
266  prg = ts->stream->programs[i];
267  break;
268  }
269  if (!prg)
270  return;
271  prg->nb_stream_indexes = 0;
272 }
273 
274 static void clear_program(MpegTSContext *ts, unsigned int programid)
275 {
276  int i;
277 
278  clear_avprogram(ts, programid);
279  for (i = 0; i < ts->nb_prg; i++)
280  if (ts->prg[i].id == programid) {
281  ts->prg[i].nb_pids = 0;
282  ts->prg[i].pmt_found = 0;
283  }
284 }
285 
287 {
288  av_freep(&ts->prg);
289  ts->nb_prg = 0;
290 }
291 
292 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
293 {
294  struct Program *p;
295  if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
296  ts->nb_prg = 0;
297  return;
298  }
299  p = &ts->prg[ts->nb_prg];
300  p->id = programid;
301  p->nb_pids = 0;
302  p->pmt_found = 0;
303  ts->nb_prg++;
304 }
305 
306 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
307  unsigned int pid)
308 {
309  struct Program *p = get_program(ts, programid);
310  int i;
311  if (!p)
312  return;
313 
314  if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
315  return;
316 
317  for (i = 0; i < p->nb_pids; i++)
318  if (p->pids[i] == pid)
319  return;
320 
321  p->pids[p->nb_pids++] = pid;
322 }
323 
324 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
325 {
326  struct Program *p = get_program(ts, programid);
327  if (!p)
328  return;
329 
330  p->pmt_found = 1;
331 }
332 
333 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
334 {
335  int i;
336  for (i = 0; i < s->nb_programs; i++) {
337  if (s->programs[i]->id == programid) {
338  s->programs[i]->pcr_pid = pid;
339  break;
340  }
341  }
342 }
343 
344 /**
345  * @brief discard_pid() decides if the pid is to be discarded according
346  * to caller's programs selection
347  * @param ts : - TS context
348  * @param pid : - pid
349  * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
350  * 0 otherwise
351  */
352 static int discard_pid(MpegTSContext *ts, unsigned int pid)
353 {
354  int i, j, k;
355  int used = 0, discarded = 0;
356  struct Program *p;
357 
358  /* If none of the programs have .discard=AVDISCARD_ALL then there's
359  * no way we have to discard this packet */
360  for (k = 0; k < ts->stream->nb_programs; k++)
361  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
362  break;
363  if (k == ts->stream->nb_programs)
364  return 0;
365 
366  for (i = 0; i < ts->nb_prg; i++) {
367  p = &ts->prg[i];
368  for (j = 0; j < p->nb_pids; j++) {
369  if (p->pids[j] != pid)
370  continue;
371  // is program with id p->id set to be discarded?
372  for (k = 0; k < ts->stream->nb_programs; k++) {
373  if (ts->stream->programs[k]->id == p->id) {
374  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
375  discarded++;
376  else
377  used++;
378  }
379  }
380  }
381  }
382 
383  return !used && discarded;
384 }
385 
386 /**
387  * Assemble PES packets out of TS packets, and then call the "section_cb"
388  * function when they are complete.
389  */
391  const uint8_t *buf, int buf_size, int is_start)
392 {
393  MpegTSSectionFilter *tss = &tss1->u.section_filter;
394  uint8_t *cur_section_buf = NULL;
395  int len, offset;
396 
397  if (is_start) {
398  memcpy(tss->section_buf, buf, buf_size);
399  tss->section_index = buf_size;
400  tss->section_h_size = -1;
401  tss->end_of_section_reached = 0;
402  } else {
403  if (tss->end_of_section_reached)
404  return;
405  len = MAX_SECTION_SIZE - tss->section_index;
406  if (buf_size < len)
407  len = buf_size;
408  memcpy(tss->section_buf + tss->section_index, buf, len);
409  tss->section_index += len;
410  }
411 
412  offset = 0;
413  cur_section_buf = tss->section_buf;
414  while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
415  /* compute section length if possible */
416  if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
417  len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
418  if (len > MAX_SECTION_SIZE)
419  return;
420  tss->section_h_size = len;
421  }
422 
423  if (tss->section_h_size != -1 &&
424  tss->section_index >= offset + tss->section_h_size) {
425  int crc_valid = 1;
426  tss->end_of_section_reached = 1;
427 
428  if (tss->check_crc) {
429  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
430  if (tss->section_h_size >= 4)
431  tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
432 
433  if (crc_valid) {
434  ts->crc_validity[ tss1->pid ] = 100;
435  }else if (ts->crc_validity[ tss1->pid ] > -10) {
436  ts->crc_validity[ tss1->pid ]--;
437  }else
438  crc_valid = 2;
439  }
440  if (crc_valid) {
441  tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
442  if (crc_valid != 1)
443  tss->last_ver = -1;
444  }
445 
446  cur_section_buf += tss->section_h_size;
447  offset += tss->section_h_size;
448  tss->section_h_size = -1;
449  } else {
450  tss->section_h_size = -1;
451  tss->end_of_section_reached = 0;
452  break;
453  }
454  }
455 }
456 
457 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
458  enum MpegTSFilterType type)
459 {
461 
462  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
463 
464  if (pid >= NB_PID_MAX || ts->pids[pid])
465  return NULL;
466  filter = av_mallocz(sizeof(MpegTSFilter));
467  if (!filter)
468  return NULL;
469  ts->pids[pid] = filter;
470 
471  filter->type = type;
472  filter->pid = pid;
473  filter->es_id = -1;
474  filter->last_cc = -1;
475  filter->last_pcr= -1;
476 
477  return filter;
478 }
479 
481  unsigned int pid,
482  SectionCallback *section_cb,
483  void *opaque,
484  int check_crc)
485 {
487  MpegTSSectionFilter *sec;
488 
489  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
490  return NULL;
491  sec = &filter->u.section_filter;
492  sec->section_cb = section_cb;
493  sec->opaque = opaque;
495  sec->check_crc = check_crc;
496  sec->last_ver = -1;
497 
498  if (!sec->section_buf) {
499  av_free(filter);
500  return NULL;
501  }
502  return filter;
503 }
504 
505 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
507  void *opaque)
508 {
510  MpegTSPESFilter *pes;
511 
512  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
513  return NULL;
514 
515  pes = &filter->u.pes_filter;
516  pes->pes_cb = pes_cb;
517  pes->opaque = opaque;
518  return filter;
519 }
520 
521 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
522 {
523  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
524 }
525 
527 {
528  int pid;
529 
530  pid = filter->pid;
531  if (filter->type == MPEGTS_SECTION)
533  else if (filter->type == MPEGTS_PES) {
534  PESContext *pes = filter->u.pes_filter.opaque;
535  av_buffer_unref(&pes->buffer);
536  /* referenced private data will be freed later in
537  * avformat_close_input */
538  if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
539  av_freep(&filter->u.pes_filter.opaque);
540  }
541  }
542 
543  av_free(filter);
544  ts->pids[pid] = NULL;
545 }
546 
547 static int analyze(const uint8_t *buf, int size, int packet_size,
548  int probe)
549 {
550  int stat[TS_MAX_PACKET_SIZE];
551  int stat_all = 0;
552  int i;
553  int best_score = 0;
554 
555  memset(stat, 0, packet_size * sizeof(*stat));
556 
557  for (i = 0; i < size - 3; i++) {
558  if (buf[i] == 0x47) {
559  int pid = AV_RB16(buf+1) & 0x1FFF;
560  int asc = buf[i + 3] & 0x30;
561  if (!probe || pid == 0x1FFF || asc) {
562  int x = i % packet_size;
563  stat[x]++;
564  stat_all++;
565  if (stat[x] > best_score) {
566  best_score = stat[x];
567  }
568  }
569  }
570  }
571 
572  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
573 }
574 
575 /* autodetect fec presence. Must have at least 1024 bytes */
576 static int get_packet_size(const uint8_t *buf, int size)
577 {
578  int score, fec_score, dvhs_score;
579 
580  if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
581  return AVERROR_INVALIDDATA;
582 
583  score = analyze(buf, size, TS_PACKET_SIZE, 0);
584  dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
585  fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
586  av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
587  score, dvhs_score, fec_score);
588 
589  if (score > fec_score && score > dvhs_score)
590  return TS_PACKET_SIZE;
591  else if (dvhs_score > score && dvhs_score > fec_score)
592  return TS_DVHS_PACKET_SIZE;
593  else if (score < fec_score && dvhs_score < fec_score)
594  return TS_FEC_PACKET_SIZE;
595  else
596  return AVERROR_INVALIDDATA;
597 }
598 
599 typedef struct SectionHeader {
601  uint16_t id;
605 } SectionHeader;
606 
608 {
609  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
610  return 1;
611 
612  tssf->last_ver = h->version;
613  tssf->last_crc = tssf->crc;
614 
615  return 0;
616 }
617 
618 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
619 {
620  const uint8_t *p;
621  int c;
622 
623  p = *pp;
624  if (p >= p_end)
625  return AVERROR_INVALIDDATA;
626  c = *p++;
627  *pp = p;
628  return c;
629 }
630 
631 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
632 {
633  const uint8_t *p;
634  int c;
635 
636  p = *pp;
637  if (1 >= p_end - p)
638  return AVERROR_INVALIDDATA;
639  c = AV_RB16(p);
640  p += 2;
641  *pp = p;
642  return c;
643 }
644 
645 /* read and allocate a DVB string preceded by its length */
646 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
647 {
648  int len;
649  const uint8_t *p;
650  char *str;
651 
652  p = *pp;
653  len = get8(&p, p_end);
654  if (len < 0)
655  return NULL;
656  if (len > p_end - p)
657  return NULL;
658  str = av_malloc(len + 1);
659  if (!str)
660  return NULL;
661  memcpy(str, p, len);
662  str[len] = '\0';
663  p += len;
664  *pp = p;
665  return str;
666 }
667 
669  const uint8_t **pp, const uint8_t *p_end)
670 {
671  int val;
672 
673  val = get8(pp, p_end);
674  if (val < 0)
675  return val;
676  h->tid = val;
677  *pp += 2;
678  val = get16(pp, p_end);
679  if (val < 0)
680  return val;
681  h->id = val;
682  val = get8(pp, p_end);
683  if (val < 0)
684  return val;
685  h->version = (val >> 1) & 0x1f;
686  val = get8(pp, p_end);
687  if (val < 0)
688  return val;
689  h->sec_num = val;
690  val = get8(pp, p_end);
691  if (val < 0)
692  return val;
693  h->last_sec_num = val;
694  return 0;
695 }
696 
697 typedef struct StreamType {
698  uint32_t stream_type;
701 } StreamType;
702 
703 static const StreamType ISO_types[] = {
705  { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
707  { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
710  /* Makito encoder sets stream type 0x11 for AAC,
711  * so auto-detect LOAS/LATM instead of hardcoding it. */
712 #if !CONFIG_LOAS_DEMUXER
713  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
714 #endif
716  { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
717  { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
723  { 0 },
724 };
725 
726 static const StreamType HDMV_types[] = {
732  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
733  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
734  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
735  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
738  { 0 },
739 };
740 
741 /* SCTE types */
742 static const StreamType SCTE_types[] = {
744  { 0 },
745 };
746 
747 /* ATSC ? */
748 static const StreamType MISC_types[] = {
751  { 0 },
752 };
753 
754 static const StreamType REGD_types[] = {
755  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
756  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
757  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
758  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
759  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
760  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
761  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
762  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
763  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
764  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
765  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
766  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
767  { 0 },
768 };
769 
770 static const StreamType METADATA_types[] = {
771  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
772  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
773  { 0 },
774 };
775 
776 /* descriptor present */
777 static const StreamType DESC_types[] = {
778  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
779  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
782  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
783  { 0 },
784 };
785 
787  uint32_t stream_type,
788  const StreamType *types)
789 {
790  for (; types->stream_type; types++)
791  if (stream_type == types->stream_type) {
792  if (st->codecpar->codec_type != types->codec_type ||
793  st->codecpar->codec_id != types->codec_id) {
794  st->codecpar->codec_type = types->codec_type;
795  st->codecpar->codec_id = types->codec_id;
796  st->internal->need_context_update = 1;
797  }
798  st->request_probe = 0;
799  return;
800  }
801 }
802 
804  uint32_t stream_type, uint32_t prog_reg_desc)
805 {
806  int old_codec_type = st->codecpar->codec_type;
807  int old_codec_id = st->codecpar->codec_id;
808  int old_codec_tag = st->codecpar->codec_tag;
809 
810  if (avcodec_is_open(st->internal->avctx)) {
811  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
812  return 0;
813  }
814 
815  avpriv_set_pts_info(st, 33, 1, 90000);
816  st->priv_data = pes;
820  pes->st = st;
821  pes->stream_type = stream_type;
822 
823  av_log(pes->stream, AV_LOG_DEBUG,
824  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
825  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
826 
827  st->codecpar->codec_tag = pes->stream_type;
828 
829  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
830  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
831  st->request_probe = 50;
832  if ((prog_reg_desc == AV_RL32("HDMV") ||
833  prog_reg_desc == AV_RL32("HDPR")) &&
835  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
836  if (pes->stream_type == 0x83) {
837  // HDMV TrueHD streams also contain an AC3 coded version of the
838  // audio track - add a second stream for this
839  AVStream *sub_st;
840  // priv_data cannot be shared between streams
841  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
842  if (!sub_pes)
843  return AVERROR(ENOMEM);
844  memcpy(sub_pes, pes, sizeof(*sub_pes));
845 
846  sub_st = avformat_new_stream(pes->stream, NULL);
847  if (!sub_st) {
848  av_free(sub_pes);
849  return AVERROR(ENOMEM);
850  }
851 
852  sub_st->id = pes->pid;
853  avpriv_set_pts_info(sub_st, 33, 1, 90000);
854  sub_st->priv_data = sub_pes;
856  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
858  sub_pes->sub_st = pes->sub_st = sub_st;
859  }
860  }
861  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
862  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
863  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
864  st->codecpar->codec_id = old_codec_id;
865  st->codecpar->codec_type = old_codec_type;
866  }
867  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
868  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
869  st->probe_packets > 0 &&
870  stream_type == STREAM_TYPE_PRIVATE_DATA) {
874  }
875 
876  /* queue a context update if properties changed */
877  if (old_codec_type != st->codecpar->codec_type ||
878  old_codec_id != st->codecpar->codec_id ||
879  old_codec_tag != st->codecpar->codec_tag)
880  st->internal->need_context_update = 1;
881 
882  return 0;
883 }
884 
886 {
887  pes->pts = AV_NOPTS_VALUE;
888  pes->dts = AV_NOPTS_VALUE;
889  pes->data_index = 0;
890  pes->flags = 0;
891  av_buffer_unref(&pes->buffer);
892 }
893 
894 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
895 {
896  av_init_packet(pkt);
897  pkt->data = (uint8_t *)buffer;
898  pkt->size = len;
899 }
900 
902 {
903  char *sd;
904 
905  av_init_packet(pkt);
906 
907  pkt->buf = pes->buffer;
908  pkt->data = pes->buffer->data;
909  pkt->size = pes->data_index;
910 
911  if (pes->total_size != MAX_PES_PAYLOAD &&
912  pes->pes_header_size + pes->data_index != pes->total_size +
913  PES_START_SIZE) {
914  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
915  pes->flags |= AV_PKT_FLAG_CORRUPT;
916  }
917  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
918 
919  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
920  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
921  pkt->stream_index = pes->sub_st->index;
922  else
923  pkt->stream_index = pes->st->index;
924  pkt->pts = pes->pts;
925  pkt->dts = pes->dts;
926  /* store position of first TS packet of this PES packet */
927  pkt->pos = pes->ts_packet_pos;
928  pkt->flags = pes->flags;
929 
930  pes->buffer = NULL;
932 
934  if (!sd)
935  return AVERROR(ENOMEM);
936  *sd = pes->stream_id;
937 
938  return 0;
939 }
940 
941 static uint64_t get_ts64(GetBitContext *gb, int bits)
942 {
943  if (get_bits_left(gb) < bits)
944  return AV_NOPTS_VALUE;
945  return get_bits64(gb, bits);
946 }
947 
949  const uint8_t *buf, int buf_size)
950 {
951  GetBitContext gb;
952  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
953  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
954  int dts_flag = -1, cts_flag = -1;
955  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
956  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
957  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
958 
959  memcpy(buf_padded, buf, buf_padded_size);
960 
961  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
962 
963  if (sl->use_au_start)
964  au_start_flag = get_bits1(&gb);
965  if (sl->use_au_end)
966  au_end_flag = get_bits1(&gb);
967  if (!sl->use_au_start && !sl->use_au_end)
968  au_start_flag = au_end_flag = 1;
969  if (sl->ocr_len > 0)
970  ocr_flag = get_bits1(&gb);
971  if (sl->use_idle)
972  idle_flag = get_bits1(&gb);
973  if (sl->use_padding)
974  padding_flag = get_bits1(&gb);
975  if (padding_flag)
976  padding_bits = get_bits(&gb, 3);
977 
978  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
979  if (sl->packet_seq_num_len)
981  if (sl->degr_prior_len)
982  if (get_bits1(&gb))
983  skip_bits(&gb, sl->degr_prior_len);
984  if (ocr_flag)
985  skip_bits_long(&gb, sl->ocr_len);
986  if (au_start_flag) {
987  if (sl->use_rand_acc_pt)
988  get_bits1(&gb);
989  if (sl->au_seq_num_len > 0)
990  skip_bits_long(&gb, sl->au_seq_num_len);
991  if (sl->use_timestamps) {
992  dts_flag = get_bits1(&gb);
993  cts_flag = get_bits1(&gb);
994  }
995  }
996  if (sl->inst_bitrate_len)
997  inst_bitrate_flag = get_bits1(&gb);
998  if (dts_flag == 1)
999  dts = get_ts64(&gb, sl->timestamp_len);
1000  if (cts_flag == 1)
1001  cts = get_ts64(&gb, sl->timestamp_len);
1002  if (sl->au_len > 0)
1003  skip_bits_long(&gb, sl->au_len);
1004  if (inst_bitrate_flag)
1005  skip_bits_long(&gb, sl->inst_bitrate_len);
1006  }
1007 
1008  if (dts != AV_NOPTS_VALUE)
1009  pes->dts = dts;
1010  if (cts != AV_NOPTS_VALUE)
1011  pes->pts = cts;
1012 
1013  if (sl->timestamp_len && sl->timestamp_res)
1015 
1016  return (get_bits_count(&gb) + 7) >> 3;
1017 }
1018 
1019 /* return non zero if a packet could be constructed */
1021  const uint8_t *buf, int buf_size, int is_start,
1022  int64_t pos)
1023 {
1024  PESContext *pes = filter->u.pes_filter.opaque;
1025  MpegTSContext *ts = pes->ts;
1026  const uint8_t *p;
1027  int ret, len, code;
1028 
1029  if (!ts->pkt)
1030  return 0;
1031 
1032  if (is_start) {
1033  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1034  ret = new_pes_packet(pes, ts->pkt);
1035  if (ret < 0)
1036  return ret;
1037  ts->stop_parse = 1;
1038  } else {
1040  }
1041  pes->state = MPEGTS_HEADER;
1042  pes->ts_packet_pos = pos;
1043  }
1044  p = buf;
1045  while (buf_size > 0) {
1046  switch (pes->state) {
1047  case MPEGTS_HEADER:
1048  len = PES_START_SIZE - pes->data_index;
1049  if (len > buf_size)
1050  len = buf_size;
1051  memcpy(pes->header + pes->data_index, p, len);
1052  pes->data_index += len;
1053  p += len;
1054  buf_size -= len;
1055  if (pes->data_index == PES_START_SIZE) {
1056  /* we got all the PES or section header. We can now
1057  * decide */
1058  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1059  pes->header[2] == 0x01) {
1060  /* it must be an MPEG-2 PES stream */
1061  code = pes->header[3] | 0x100;
1062  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1063  code);
1064  pes->stream_id = pes->header[3];
1065 
1066  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1067  (!pes->sub_st ||
1068  pes->sub_st->discard == AVDISCARD_ALL)) ||
1069  code == 0x1be) /* padding_stream */
1070  goto skip;
1071 
1072  /* stream not present in PMT */
1073  if (!pes->st) {
1074  if (ts->skip_changes)
1075  goto skip;
1076 
1077  pes->st = avformat_new_stream(ts->stream, NULL);
1078  if (!pes->st)
1079  return AVERROR(ENOMEM);
1080  pes->st->id = pes->pid;
1081  mpegts_set_stream_info(pes->st, pes, 0, 0);
1082  }
1083 
1084  pes->total_size = AV_RB16(pes->header + 4);
1085  /* NOTE: a zero total size means the PES size is
1086  * unbounded */
1087  if (!pes->total_size)
1088  pes->total_size = MAX_PES_PAYLOAD;
1089 
1090  /* allocate pes buffer */
1091  pes->buffer = av_buffer_alloc(pes->total_size +
1093  if (!pes->buffer)
1094  return AVERROR(ENOMEM);
1095 
1096  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1097  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1098  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1099  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1100  pes->state = MPEGTS_PESHEADER;
1101  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1102  av_log(pes->stream, AV_LOG_TRACE,
1103  "pid=%x stream_type=%x probing\n",
1104  pes->pid,
1105  pes->stream_type);
1106  pes->st->request_probe = 1;
1107  }
1108  } else {
1109  pes->pes_header_size = 6;
1110  pes->state = MPEGTS_PAYLOAD;
1111  pes->data_index = 0;
1112  }
1113  } else {
1114  /* otherwise, it should be a table */
1115  /* skip packet */
1116 skip:
1117  pes->state = MPEGTS_SKIP;
1118  continue;
1119  }
1120  }
1121  break;
1122  /**********************************************/
1123  /* PES packing parsing */
1124  case MPEGTS_PESHEADER:
1125  len = PES_HEADER_SIZE - pes->data_index;
1126  if (len < 0)
1127  return AVERROR_INVALIDDATA;
1128  if (len > buf_size)
1129  len = buf_size;
1130  memcpy(pes->header + pes->data_index, p, len);
1131  pes->data_index += len;
1132  p += len;
1133  buf_size -= len;
1134  if (pes->data_index == PES_HEADER_SIZE) {
1135  pes->pes_header_size = pes->header[8] + 9;
1137  }
1138  break;
1139  case MPEGTS_PESHEADER_FILL:
1140  len = pes->pes_header_size - pes->data_index;
1141  if (len < 0)
1142  return AVERROR_INVALIDDATA;
1143  if (len > buf_size)
1144  len = buf_size;
1145  memcpy(pes->header + pes->data_index, p, len);
1146  pes->data_index += len;
1147  p += len;
1148  buf_size -= len;
1149  if (pes->data_index == pes->pes_header_size) {
1150  const uint8_t *r;
1151  unsigned int flags, pes_ext, skip;
1152 
1153  flags = pes->header[7];
1154  r = pes->header + 9;
1155  pes->pts = AV_NOPTS_VALUE;
1156  pes->dts = AV_NOPTS_VALUE;
1157  if ((flags & 0xc0) == 0x80) {
1158  pes->dts = pes->pts = ff_parse_pes_pts(r);
1159  r += 5;
1160  } else if ((flags & 0xc0) == 0xc0) {
1161  pes->pts = ff_parse_pes_pts(r);
1162  r += 5;
1163  pes->dts = ff_parse_pes_pts(r);
1164  r += 5;
1165  }
1166  pes->extended_stream_id = -1;
1167  if (flags & 0x01) { /* PES extension */
1168  pes_ext = *r++;
1169  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1170  skip = (pes_ext >> 4) & 0xb;
1171  skip += skip & 0x9;
1172  r += skip;
1173  if ((pes_ext & 0x41) == 0x01 &&
1174  (r + 2) <= (pes->header + pes->pes_header_size)) {
1175  /* PES extension 2 */
1176  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1177  pes->extended_stream_id = r[1];
1178  }
1179  }
1180 
1181  /* we got the full header. We parse it and get the payload */
1182  pes->state = MPEGTS_PAYLOAD;
1183  pes->data_index = 0;
1184  if (pes->stream_type == 0x12 && buf_size > 0) {
1185  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1186  buf_size);
1187  pes->pes_header_size += sl_header_bytes;
1188  p += sl_header_bytes;
1189  buf_size -= sl_header_bytes;
1190  }
1191  if (pes->stream_type == 0x15 && buf_size >= 5) {
1192  /* skip metadata access unit header */
1193  pes->pes_header_size += 5;
1194  p += 5;
1195  buf_size -= 5;
1196  }
1197  if ( pes->ts->fix_teletext_pts
1200  ) {
1201  AVProgram *p = NULL;
1202  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1203  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1204  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1205  if (f) {
1206  AVStream *st = NULL;
1207  if (f->type == MPEGTS_PES) {
1208  PESContext *pcrpes = f->u.pes_filter.opaque;
1209  if (pcrpes)
1210  st = pcrpes->st;
1211  } else if (f->type == MPEGTS_PCR) {
1212  int i;
1213  for (i = 0; i < p->nb_stream_indexes; i++) {
1214  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1215  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1216  st = pst;
1217  }
1218  }
1219  if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1220  // teletext packets do not always have correct timestamps,
1221  // the standard says they should be handled after 40.6 ms at most,
1222  // and the pcr error to this packet should be no more than 100 ms.
1223  // TODO: we should interpolate the PCR, not just use the last one
1224  int64_t pcr = f->last_pcr / 300;
1227  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1228  pes->pts = pes->dts = pcr;
1229  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1230  pes->dts > pcr + 3654 + 9000) {
1231  pes->pts = pes->dts = pcr + 3654 + 9000;
1232  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1233  pes->dts > pcr + 10*90000) { //10sec
1234  pes->pts = pes->dts = pcr + 3654 + 9000;
1235  }
1236  break;
1237  }
1238  }
1239  }
1240  }
1241  }
1242  }
1243  break;
1244  case MPEGTS_PAYLOAD:
1245  if (pes->buffer) {
1246  if (pes->data_index > 0 &&
1247  pes->data_index + buf_size > pes->total_size) {
1248  ret = new_pes_packet(pes, ts->pkt);
1249  if (ret < 0)
1250  return ret;
1251  pes->total_size = MAX_PES_PAYLOAD;
1252  pes->buffer = av_buffer_alloc(pes->total_size +
1254  if (!pes->buffer)
1255  return AVERROR(ENOMEM);
1256  ts->stop_parse = 1;
1257  } else if (pes->data_index == 0 &&
1258  buf_size > pes->total_size) {
1259  // pes packet size is < ts size packet and pes data is padded with 0xff
1260  // not sure if this is legal in ts but see issue #2392
1261  buf_size = pes->total_size;
1262  }
1263  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1264  pes->data_index += buf_size;
1265  /* emit complete packets with known packet size
1266  * decreases demuxer delay for infrequent packets like subtitles from
1267  * a couple of seconds to milliseconds for properly muxed files.
1268  * total_size is the number of bytes following pes_packet_length
1269  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1270  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1271  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1272  ts->stop_parse = 1;
1273  ret = new_pes_packet(pes, ts->pkt);
1274  if (ret < 0)
1275  return ret;
1276  }
1277  }
1278  buf_size = 0;
1279  break;
1280  case MPEGTS_SKIP:
1281  buf_size = 0;
1282  break;
1283  }
1284  }
1285 
1286  return 0;
1287 }
1288 
1289 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1290 {
1291  MpegTSFilter *tss;
1292  PESContext *pes;
1293 
1294  /* if no pid found, then add a pid context */
1295  pes = av_mallocz(sizeof(PESContext));
1296  if (!pes)
1297  return 0;
1298  pes->ts = ts;
1299  pes->stream = ts->stream;
1300  pes->pid = pid;
1301  pes->pcr_pid = pcr_pid;
1302  pes->state = MPEGTS_SKIP;
1303  pes->pts = AV_NOPTS_VALUE;
1304  pes->dts = AV_NOPTS_VALUE;
1305  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1306  if (!tss) {
1307  av_free(pes);
1308  return 0;
1309  }
1310  return pes;
1311 }
1312 
1313 #define MAX_LEVEL 4
1314 typedef struct MP4DescrParseContext {
1321  int level;
1324 
1326  const uint8_t *buf, unsigned size,
1327  Mp4Descr *descr, int max_descr_count)
1328 {
1329  int ret;
1330  if (size > (1 << 30))
1331  return AVERROR_INVALIDDATA;
1332 
1333  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1334  NULL, NULL, NULL, NULL)) < 0)
1335  return ret;
1336 
1337  d->s = s;
1338  d->level = 0;
1339  d->descr_count = 0;
1340  d->descr = descr;
1341  d->active_descr = NULL;
1342  d->max_descr_count = max_descr_count;
1343 
1344  return 0;
1345 }
1346 
1347 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1348 {
1349  int64_t new_off = avio_tell(pb);
1350  (*len) -= new_off - *off;
1351  *off = new_off;
1352 }
1353 
1354 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1355  int target_tag);
1356 
1357 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1358 {
1359  while (len > 0) {
1360  int ret = parse_mp4_descr(d, off, len, 0);
1361  if (ret < 0)
1362  return ret;
1363  update_offsets(&d->pb, &off, &len);
1364  }
1365  return 0;
1366 }
1367 
1368 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1369 {
1370  avio_rb16(&d->pb); // ID
1371  avio_r8(&d->pb);
1372  avio_r8(&d->pb);
1373  avio_r8(&d->pb);
1374  avio_r8(&d->pb);
1375  avio_r8(&d->pb);
1376  update_offsets(&d->pb, &off, &len);
1377  return parse_mp4_descr_arr(d, off, len);
1378 }
1379 
1380 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1381 {
1382  int id_flags;
1383  if (len < 2)
1384  return 0;
1385  id_flags = avio_rb16(&d->pb);
1386  if (!(id_flags & 0x0020)) { // URL_Flag
1387  update_offsets(&d->pb, &off, &len);
1388  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1389  } else {
1390  return 0;
1391  }
1392 }
1393 
1394 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1395 {
1396  int es_id = 0;
1397  int ret = 0;
1398 
1399  if (d->descr_count >= d->max_descr_count)
1400  return AVERROR_INVALIDDATA;
1401  ff_mp4_parse_es_descr(&d->pb, &es_id);
1402  d->active_descr = d->descr + (d->descr_count++);
1403 
1404  d->active_descr->es_id = es_id;
1405  update_offsets(&d->pb, &off, &len);
1406  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1407  return ret;
1408  update_offsets(&d->pb, &off, &len);
1409  if (len > 0)
1410  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1411  d->active_descr = NULL;
1412  return ret;
1413 }
1414 
1416  int len)
1417 {
1418  Mp4Descr *descr = d->active_descr;
1419  if (!descr)
1420  return AVERROR_INVALIDDATA;
1422  if (!descr->dec_config_descr)
1423  return AVERROR(ENOMEM);
1424  descr->dec_config_descr_len = len;
1425  avio_read(&d->pb, descr->dec_config_descr, len);
1426  return 0;
1427 }
1428 
1429 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1430 {
1431  Mp4Descr *descr = d->active_descr;
1432  int predefined;
1433  if (!descr)
1434  return AVERROR_INVALIDDATA;
1435 
1436 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1437  descr->sl.dst = avio_r8(&d->pb); \
1438  if (descr->sl.dst > maxv) { \
1439  descr->sl.dst = maxv; \
1440  return AVERROR_INVALIDDATA; \
1441  } \
1442 } while (0)
1443 
1444  predefined = avio_r8(&d->pb);
1445  if (!predefined) {
1446  int lengths;
1447  int flags = avio_r8(&d->pb);
1448  descr->sl.use_au_start = !!(flags & 0x80);
1449  descr->sl.use_au_end = !!(flags & 0x40);
1450  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1451  descr->sl.use_padding = !!(flags & 0x08);
1452  descr->sl.use_timestamps = !!(flags & 0x04);
1453  descr->sl.use_idle = !!(flags & 0x02);
1454  descr->sl.timestamp_res = avio_rb32(&d->pb);
1455  avio_rb32(&d->pb);
1456  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1457  R8_CHECK_CLIP_MAX(ocr_len, 63);
1458  R8_CHECK_CLIP_MAX(au_len, 31);
1459  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1460  lengths = avio_rb16(&d->pb);
1461  descr->sl.degr_prior_len = lengths >> 12;
1462  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1463  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1464  } else if (!d->predefined_SLConfigDescriptor_seen){
1465  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1467  }
1468  return 0;
1469 }
1470 
1471 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1472  int target_tag)
1473 {
1474  int tag;
1475  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1476  int ret = 0;
1477 
1478  update_offsets(&d->pb, &off, &len);
1479  if (len < 0 || len1 > len || len1 <= 0) {
1480  av_log(d->s, AV_LOG_ERROR,
1481  "Tag %x length violation new length %d bytes remaining %d\n",
1482  tag, len1, len);
1483  return AVERROR_INVALIDDATA;
1484  }
1485 
1486  if (d->level++ >= MAX_LEVEL) {
1487  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1488  ret = AVERROR_INVALIDDATA;
1489  goto done;
1490  }
1491 
1492  if (target_tag && tag != target_tag) {
1493  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1494  target_tag);
1495  ret = AVERROR_INVALIDDATA;
1496  goto done;
1497  }
1498 
1499  switch (tag) {
1500  case MP4IODescrTag:
1501  ret = parse_MP4IODescrTag(d, off, len1);
1502  break;
1503  case MP4ODescrTag:
1504  ret = parse_MP4ODescrTag(d, off, len1);
1505  break;
1506  case MP4ESDescrTag:
1507  ret = parse_MP4ESDescrTag(d, off, len1);
1508  break;
1509  case MP4DecConfigDescrTag:
1510  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1511  break;
1512  case MP4SLDescrTag:
1513  ret = parse_MP4SLDescrTag(d, off, len1);
1514  break;
1515  }
1516 
1517 
1518 done:
1519  d->level--;
1520  avio_seek(&d->pb, off + len1, SEEK_SET);
1521  return ret;
1522 }
1523 
1524 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1525  Mp4Descr *descr, int *descr_count, int max_descr_count)
1526 {
1528  int ret;
1529 
1530  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1531  if (ret < 0)
1532  return ret;
1533 
1534  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1535 
1536  *descr_count = d.descr_count;
1537  return ret;
1538 }
1539 
1540 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1541  Mp4Descr *descr, int *descr_count, int max_descr_count)
1542 {
1544  int ret;
1545 
1546  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1547  if (ret < 0)
1548  return ret;
1549 
1550  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1551 
1552  *descr_count = d.descr_count;
1553  return ret;
1554 }
1555 
1557  int section_len)
1558 {
1559  MpegTSContext *ts = filter->u.section_filter.opaque;
1560  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1561  SectionHeader h;
1562  const uint8_t *p, *p_end;
1563  AVIOContext pb;
1564  int mp4_descr_count = 0;
1565  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1566  int i, pid;
1567  AVFormatContext *s = ts->stream;
1568 
1569  p_end = section + section_len - 4;
1570  p = section;
1571  if (parse_section_header(&h, &p, p_end) < 0)
1572  return;
1573  if (h.tid != M4OD_TID)
1574  return;
1575  if (skip_identical(&h, tssf))
1576  return;
1577 
1578  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1580 
1581  for (pid = 0; pid < NB_PID_MAX; pid++) {
1582  if (!ts->pids[pid])
1583  continue;
1584  for (i = 0; i < mp4_descr_count; i++) {
1585  PESContext *pes;
1586  AVStream *st;
1587  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1588  continue;
1589  if (ts->pids[pid]->type != MPEGTS_PES) {
1590  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1591  continue;
1592  }
1593  pes = ts->pids[pid]->u.pes_filter.opaque;
1594  st = pes->st;
1595  if (!st)
1596  continue;
1597 
1598  pes->sl = mp4_descr[i].sl;
1599 
1600  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1601  mp4_descr[i].dec_config_descr_len, 0,
1602  NULL, NULL, NULL, NULL);
1603  ff_mp4_read_dec_config_descr(s, st, &pb);
1604  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1605  st->codecpar->extradata_size > 0)
1606  st->need_parsing = 0;
1607  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1608  st->codecpar->extradata_size > 0)
1609  st->need_parsing = 0;
1610 
1612  st->internal->need_context_update = 1;
1613  }
1614  }
1615  for (i = 0; i < mp4_descr_count; i++)
1616  av_free(mp4_descr[i].dec_config_descr);
1617 }
1618 
1620  int section_len)
1621 {
1622  AVProgram *prg = NULL;
1623  MpegTSContext *ts = filter->u.section_filter.opaque;
1624 
1625  int idx = ff_find_stream_index(ts->stream, filter->pid);
1626  if (idx < 0)
1627  return;
1628 
1629  new_data_packet(section, section_len, ts->pkt);
1630  ts->pkt->stream_index = idx;
1631  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1632  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1633  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1634  if (f && f->last_pcr != -1)
1635  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1636  }
1637  ts->stop_parse = 1;
1638 
1639 }
1640 
1642  1, 0, 1, 1, 2, 2, 2, 3, 3
1643 };
1644 
1645 static const uint8_t opus_stream_cnt[9] = {
1646  1, 1, 1, 2, 2, 3, 4, 4, 5,
1647 };
1648 
1649 static const uint8_t opus_channel_map[8][8] = {
1650  { 0 },
1651  { 0,1 },
1652  { 0,2,1 },
1653  { 0,1,2,3 },
1654  { 0,4,1,2,3 },
1655  { 0,4,1,2,3,5 },
1656  { 0,4,1,2,3,5,6 },
1657  { 0,6,1,2,3,4,5,7 },
1658 };
1659 
1661  const uint8_t **pp, const uint8_t *desc_list_end,
1662  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1663  MpegTSContext *ts)
1664 {
1665  const uint8_t *desc_end;
1666  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1667  char language[252];
1668  int i;
1669 
1670  desc_tag = get8(pp, desc_list_end);
1671  if (desc_tag < 0)
1672  return AVERROR_INVALIDDATA;
1673  desc_len = get8(pp, desc_list_end);
1674  if (desc_len < 0)
1675  return AVERROR_INVALIDDATA;
1676  desc_end = *pp + desc_len;
1677  if (desc_end > desc_list_end)
1678  return AVERROR_INVALIDDATA;
1679 
1680  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1681 
1682  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1683  stream_type == STREAM_TYPE_PRIVATE_DATA)
1684  mpegts_find_stream_type(st, desc_tag, DESC_types);
1685 
1686  switch (desc_tag) {
1687  case 0x1E: /* SL descriptor */
1688  desc_es_id = get16(pp, desc_end);
1689  if (desc_es_id < 0)
1690  break;
1691  if (ts && ts->pids[pid])
1692  ts->pids[pid]->es_id = desc_es_id;
1693  for (i = 0; i < mp4_descr_count; i++)
1694  if (mp4_descr[i].dec_config_descr_len &&
1695  mp4_descr[i].es_id == desc_es_id) {
1696  AVIOContext pb;
1697  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1698  mp4_descr[i].dec_config_descr_len, 0,
1699  NULL, NULL, NULL, NULL);
1700  ff_mp4_read_dec_config_descr(fc, st, &pb);
1701  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1702  st->codecpar->extradata_size > 0) {
1703  st->need_parsing = 0;
1704  st->internal->need_context_update = 1;
1705  }
1707  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1708  }
1709  break;
1710  case 0x1F: /* FMC descriptor */
1711  if (get16(pp, desc_end) < 0)
1712  break;
1713  if (mp4_descr_count > 0 &&
1715  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1716  st->request_probe > 0) &&
1717  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1718  AVIOContext pb;
1719  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1720  mp4_descr->dec_config_descr_len, 0,
1721  NULL, NULL, NULL, NULL);
1722  ff_mp4_read_dec_config_descr(fc, st, &pb);
1723  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1724  st->codecpar->extradata_size > 0) {
1725  st->request_probe = st->need_parsing = 0;
1727  st->internal->need_context_update = 1;
1728  }
1729  }
1730  break;
1731  case 0x56: /* DVB teletext descriptor */
1732  {
1733  uint8_t *extradata = NULL;
1734  int language_count = desc_len / 5;
1735 
1736  if (desc_len > 0 && desc_len % 5 != 0)
1737  return AVERROR_INVALIDDATA;
1738 
1739  if (language_count > 0) {
1740  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1741  av_assert0(language_count <= sizeof(language) / 4);
1742 
1743  if (st->codecpar->extradata == NULL) {
1744  if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1745  return AVERROR(ENOMEM);
1746  }
1747  }
1748 
1749  if (st->codecpar->extradata_size < language_count * 2)
1750  return AVERROR_INVALIDDATA;
1751 
1752  extradata = st->codecpar->extradata;
1753 
1754  for (i = 0; i < language_count; i++) {
1755  language[i * 4 + 0] = get8(pp, desc_end);
1756  language[i * 4 + 1] = get8(pp, desc_end);
1757  language[i * 4 + 2] = get8(pp, desc_end);
1758  language[i * 4 + 3] = ',';
1759 
1760  memcpy(extradata, *pp, 2);
1761  extradata += 2;
1762 
1763  *pp += 2;
1764  }
1765 
1766  language[i * 4 - 1] = 0;
1767  av_dict_set(&st->metadata, "language", language, 0);
1768  st->internal->need_context_update = 1;
1769  }
1770  }
1771  break;
1772  case 0x59: /* subtitling descriptor */
1773  {
1774  /* 8 bytes per DVB subtitle substream data:
1775  * ISO_639_language_code (3 bytes),
1776  * subtitling_type (1 byte),
1777  * composition_page_id (2 bytes),
1778  * ancillary_page_id (2 bytes) */
1779  int language_count = desc_len / 8;
1780 
1781  if (desc_len > 0 && desc_len % 8 != 0)
1782  return AVERROR_INVALIDDATA;
1783 
1784  if (language_count > 1) {
1785  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1786  }
1787 
1788  if (language_count > 0) {
1789  uint8_t *extradata;
1790 
1791  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1792  av_assert0(language_count <= sizeof(language) / 4);
1793 
1794  if (st->codecpar->extradata == NULL) {
1795  if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1796  return AVERROR(ENOMEM);
1797  }
1798  }
1799 
1800  if (st->codecpar->extradata_size < language_count * 5)
1801  return AVERROR_INVALIDDATA;
1802 
1803  extradata = st->codecpar->extradata;
1804 
1805  for (i = 0; i < language_count; i++) {
1806  language[i * 4 + 0] = get8(pp, desc_end);
1807  language[i * 4 + 1] = get8(pp, desc_end);
1808  language[i * 4 + 2] = get8(pp, desc_end);
1809  language[i * 4 + 3] = ',';
1810 
1811  /* hearing impaired subtitles detection using subtitling_type */
1812  switch (*pp[0]) {
1813  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1814  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1815  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1816  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1817  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1818  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1820  break;
1821  }
1822 
1823  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1824  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1825  extradata += 5;
1826 
1827  *pp += 4;
1828  }
1829 
1830  language[i * 4 - 1] = 0;
1831  av_dict_set(&st->metadata, "language", language, 0);
1832  st->internal->need_context_update = 1;
1833  }
1834  }
1835  break;
1836  case 0x0a: /* ISO 639 language descriptor */
1837  for (i = 0; i + 4 <= desc_len; i += 4) {
1838  language[i + 0] = get8(pp, desc_end);
1839  language[i + 1] = get8(pp, desc_end);
1840  language[i + 2] = get8(pp, desc_end);
1841  language[i + 3] = ',';
1842  switch (get8(pp, desc_end)) {
1843  case 0x01:
1845  break;
1846  case 0x02:
1848  break;
1849  case 0x03:
1851  break;
1852  }
1853  }
1854  if (i && language[0]) {
1855  language[i - 1] = 0;
1856  /* don't overwrite language, as it may already have been set by
1857  * another, more specific descriptor (e.g. supplementary audio) */
1858  av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1859  }
1860  break;
1861  case 0x05: /* registration descriptor */
1862  st->codecpar->codec_tag = bytestream_get_le32(pp);
1863  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1864  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1865  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1866  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1867  st->request_probe = 50;
1868  }
1869  break;
1870  case 0x52: /* stream identifier descriptor */
1871  st->stream_identifier = 1 + get8(pp, desc_end);
1872  break;
1873  case 0x26: /* metadata descriptor */
1874  if (get16(pp, desc_end) == 0xFFFF)
1875  *pp += 4;
1876  if (get8(pp, desc_end) == 0xFF) {
1877  st->codecpar->codec_tag = bytestream_get_le32(pp);
1878  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1879  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1880  }
1881  break;
1882  case 0x7f: /* DVB extension descriptor */
1883  ext_desc_tag = get8(pp, desc_end);
1884  if (ext_desc_tag < 0)
1885  return AVERROR_INVALIDDATA;
1886  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1887  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1888  if (!st->codecpar->extradata) {
1891  if (!st->codecpar->extradata)
1892  return AVERROR(ENOMEM);
1893 
1896 
1897  channel_config_code = get8(pp, desc_end);
1898  if (channel_config_code < 0)
1899  return AVERROR_INVALIDDATA;
1900  if (channel_config_code <= 0x8) {
1901  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1902  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1903  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1904  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1905  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1906  } else {
1907  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1908  }
1910  st->internal->need_context_update = 1;
1911  }
1912  }
1913  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
1914  int flags;
1915 
1916  if (desc_len < 1)
1917  return AVERROR_INVALIDDATA;
1918  flags = get8(pp, desc_end);
1919 
1920  if ((flags & 0x80) == 0) /* mix_type */
1922 
1923  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
1924  case 0x01:
1926  break;
1927  case 0x02:
1929  break;
1930  case 0x03:
1932  break;
1933  }
1934 
1935  if (flags & 0x01) { /* language_code_present */
1936  if (desc_len < 4)
1937  return AVERROR_INVALIDDATA;
1938  language[0] = get8(pp, desc_end);
1939  language[1] = get8(pp, desc_end);
1940  language[2] = get8(pp, desc_end);
1941  language[3] = 0;
1942 
1943  /* This language always has to override a possible
1944  * ISO 639 language descriptor language */
1945  if (language[0])
1946  av_dict_set(&st->metadata, "language", language, 0);
1947  }
1948  }
1949  break;
1950  default:
1951  break;
1952  }
1953  *pp = desc_end;
1954  return 0;
1955 }
1956 
1957 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
1958 {
1959  return !(stream_type == 0x13 ||
1960  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
1961 }
1962 
1963 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1964 {
1965  MpegTSContext *ts = filter->u.section_filter.opaque;
1966  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1967  SectionHeader h1, *h = &h1;
1968  PESContext *pes;
1969  AVStream *st;
1970  const uint8_t *p, *p_end, *desc_list_end;
1971  int program_info_length, pcr_pid, pid, stream_type;
1972  int desc_list_len;
1973  uint32_t prog_reg_desc = 0; /* registration descriptor */
1974 
1975  int mp4_descr_count = 0;
1976  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1977  int i;
1978 
1979  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1980  hex_dump_debug(ts->stream, section, section_len);
1981 
1982  p_end = section + section_len - 4;
1983  p = section;
1984  if (parse_section_header(h, &p, p_end) < 0)
1985  return;
1986  if (h->tid != PMT_TID)
1987  return;
1988  if (skip_identical(h, tssf))
1989  return;
1990 
1991  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
1992  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
1993 
1994  if (!ts->scan_all_pmts && ts->skip_changes)
1995  return;
1996 
1997  if (!ts->skip_clear)
1998  clear_program(ts, h->id);
1999 
2000  pcr_pid = get16(&p, p_end);
2001  if (pcr_pid < 0)
2002  return;
2003  pcr_pid &= 0x1fff;
2004  add_pid_to_pmt(ts, h->id, pcr_pid);
2005  set_pcr_pid(ts->stream, h->id, pcr_pid);
2006 
2007  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2008 
2009  program_info_length = get16(&p, p_end);
2010  if (program_info_length < 0)
2011  return;
2012  program_info_length &= 0xfff;
2013  while (program_info_length >= 2) {
2014  uint8_t tag, len;
2015  tag = get8(&p, p_end);
2016  len = get8(&p, p_end);
2017 
2018  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2019 
2020  if (len > program_info_length - 2)
2021  // something else is broken, exit the program_descriptors_loop
2022  break;
2023  program_info_length -= len + 2;
2024  if (tag == 0x1d) { // IOD descriptor
2025  get8(&p, p_end); // scope
2026  get8(&p, p_end); // label
2027  len -= 2;
2028  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2029  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2030  } else if (tag == 0x05 && len >= 4) { // registration descriptor
2031  prog_reg_desc = bytestream_get_le32(&p);
2032  len -= 4;
2033  }
2034  p += len;
2035  }
2036  p += program_info_length;
2037  if (p >= p_end)
2038  goto out;
2039 
2040  // stop parsing after pmt, we found header
2041  if (!ts->stream->nb_streams)
2042  ts->stop_parse = 2;
2043 
2044  set_pmt_found(ts, h->id);
2045 
2046 
2047  for (;;) {
2048  st = 0;
2049  pes = NULL;
2050  stream_type = get8(&p, p_end);
2051  if (stream_type < 0)
2052  break;
2053  pid = get16(&p, p_end);
2054  if (pid < 0)
2055  goto out;
2056  pid &= 0x1fff;
2057  if (pid == ts->current_pid)
2058  goto out;
2059 
2060  /* now create stream */
2061  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2062  pes = ts->pids[pid]->u.pes_filter.opaque;
2063  if (!pes->st) {
2064  pes->st = avformat_new_stream(pes->stream, NULL);
2065  if (!pes->st)
2066  goto out;
2067  pes->st->id = pes->pid;
2068  }
2069  st = pes->st;
2070  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2071  if (ts->pids[pid])
2072  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2073  pes = add_pes_stream(ts, pid, pcr_pid);
2074  if (pes) {
2075  st = avformat_new_stream(pes->stream, NULL);
2076  if (!st)
2077  goto out;
2078  st->id = pes->pid;
2079  }
2080  } else {
2081  int idx = ff_find_stream_index(ts->stream, pid);
2082  if (idx >= 0) {
2083  st = ts->stream->streams[idx];
2084  } else {
2085  st = avformat_new_stream(ts->stream, NULL);
2086  if (!st)
2087  goto out;
2088  st->id = pid;
2090  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2091  mpegts_find_stream_type(st, stream_type, SCTE_types);
2092  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2093  }
2094  }
2095  }
2096 
2097  if (!st)
2098  goto out;
2099 
2100  if (pes && !pes->stream_type)
2101  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2102 
2103  add_pid_to_pmt(ts, h->id, pid);
2104 
2106 
2107  desc_list_len = get16(&p, p_end);
2108  if (desc_list_len < 0)
2109  goto out;
2110  desc_list_len &= 0xfff;
2111  desc_list_end = p + desc_list_len;
2112  if (desc_list_end > p_end)
2113  goto out;
2114  for (;;) {
2115  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2116  desc_list_end, mp4_descr,
2117  mp4_descr_count, pid, ts) < 0)
2118  break;
2119 
2120  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2121  stream_type == 0x83 && pes->sub_st) {
2123  pes->sub_st->index);
2124  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2125  }
2126  }
2127  p = desc_list_end;
2128  }
2129 
2130  if (!ts->pids[pcr_pid])
2131  mpegts_open_pcr_filter(ts, pcr_pid);
2132 
2133 out:
2134  for (i = 0; i < mp4_descr_count; i++)
2135  av_free(mp4_descr[i].dec_config_descr);
2136 }
2137 
2138 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2139 {
2140  MpegTSContext *ts = filter->u.section_filter.opaque;
2141  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2142  SectionHeader h1, *h = &h1;
2143  const uint8_t *p, *p_end;
2144  int sid, pmt_pid;
2145  AVProgram *program;
2146 
2147  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2148  hex_dump_debug(ts->stream, section, section_len);
2149 
2150  p_end = section + section_len - 4;
2151  p = section;
2152  if (parse_section_header(h, &p, p_end) < 0)
2153  return;
2154  if (h->tid != PAT_TID)
2155  return;
2156  if (ts->skip_changes)
2157  return;
2158 
2159  if (skip_identical(h, tssf))
2160  return;
2161  ts->stream->ts_id = h->id;
2162 
2163  clear_programs(ts);
2164  for (;;) {
2165  sid = get16(&p, p_end);
2166  if (sid < 0)
2167  break;
2168  pmt_pid = get16(&p, p_end);
2169  if (pmt_pid < 0)
2170  break;
2171  pmt_pid &= 0x1fff;
2172 
2173  if (pmt_pid == ts->current_pid)
2174  break;
2175 
2176  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2177 
2178  if (sid == 0x0000) {
2179  /* NIT info */
2180  } else {
2181  MpegTSFilter *fil = ts->pids[pmt_pid];
2182  program = av_new_program(ts->stream, sid);
2183  if (program) {
2184  program->program_num = sid;
2185  program->pmt_pid = pmt_pid;
2186  }
2187  if (fil)
2188  if ( fil->type != MPEGTS_SECTION
2189  || fil->pid != pmt_pid
2190  || fil->u.section_filter.section_cb != pmt_cb)
2191  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2192 
2193  if (!ts->pids[pmt_pid])
2194  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2195  add_pat_entry(ts, sid);
2196  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2197  add_pid_to_pmt(ts, sid, pmt_pid);
2198  }
2199  }
2200 
2201  if (sid < 0) {
2202  int i,j;
2203  for (j=0; j<ts->stream->nb_programs; j++) {
2204  for (i = 0; i < ts->nb_prg; i++)
2205  if (ts->prg[i].id == ts->stream->programs[j]->id)
2206  break;
2207  if (i==ts->nb_prg && !ts->skip_clear)
2208  clear_avprogram(ts, ts->stream->programs[j]->id);
2209  }
2210  }
2211 }
2212 
2213 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2214 {
2215  MpegTSContext *ts = filter->u.section_filter.opaque;
2216  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2217  SectionHeader h1, *h = &h1;
2218  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2219  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2220  char *name, *provider_name;
2221 
2222  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2223  hex_dump_debug(ts->stream, section, section_len);
2224 
2225  p_end = section + section_len - 4;
2226  p = section;
2227  if (parse_section_header(h, &p, p_end) < 0)
2228  return;
2229  if (h->tid != SDT_TID)
2230  return;
2231  if (ts->skip_changes)
2232  return;
2233  if (skip_identical(h, tssf))
2234  return;
2235 
2236  onid = get16(&p, p_end);
2237  if (onid < 0)
2238  return;
2239  val = get8(&p, p_end);
2240  if (val < 0)
2241  return;
2242  for (;;) {
2243  sid = get16(&p, p_end);
2244  if (sid < 0)
2245  break;
2246  val = get8(&p, p_end);
2247  if (val < 0)
2248  break;
2249  desc_list_len = get16(&p, p_end);
2250  if (desc_list_len < 0)
2251  break;
2252  desc_list_len &= 0xfff;
2253  desc_list_end = p + desc_list_len;
2254  if (desc_list_end > p_end)
2255  break;
2256  for (;;) {
2257  desc_tag = get8(&p, desc_list_end);
2258  if (desc_tag < 0)
2259  break;
2260  desc_len = get8(&p, desc_list_end);
2261  desc_end = p + desc_len;
2262  if (desc_len < 0 || desc_end > desc_list_end)
2263  break;
2264 
2265  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2266  desc_tag, desc_len);
2267 
2268  switch (desc_tag) {
2269  case 0x48:
2270  service_type = get8(&p, p_end);
2271  if (service_type < 0)
2272  break;
2273  provider_name = getstr8(&p, p_end);
2274  if (!provider_name)
2275  break;
2276  name = getstr8(&p, p_end);
2277  if (name) {
2278  AVProgram *program = av_new_program(ts->stream, sid);
2279  if (program) {
2280  av_dict_set(&program->metadata, "service_name", name, 0);
2281  av_dict_set(&program->metadata, "service_provider",
2282  provider_name, 0);
2283  }
2284  }
2285  av_free(name);
2286  av_free(provider_name);
2287  break;
2288  default:
2289  break;
2290  }
2291  p = desc_end;
2292  }
2293  p = desc_list_end;
2294  }
2295 }
2296 
2297 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2298  const uint8_t *packet);
2299 
2300 /* handle one TS packet */
2301 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2302 {
2303  MpegTSFilter *tss;
2304  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2305  has_adaptation, has_payload;
2306  const uint8_t *p, *p_end;
2307  int64_t pos;
2308 
2309  pid = AV_RB16(packet + 1) & 0x1fff;
2310  if (pid && discard_pid(ts, pid))
2311  return 0;
2312  is_start = packet[1] & 0x40;
2313  tss = ts->pids[pid];
2314  if (ts->auto_guess && !tss && is_start) {
2315  add_pes_stream(ts, pid, -1);
2316  tss = ts->pids[pid];
2317  }
2318  if (!tss)
2319  return 0;
2320  ts->current_pid = pid;
2321 
2322  afc = (packet[3] >> 4) & 3;
2323  if (afc == 0) /* reserved value */
2324  return 0;
2325  has_adaptation = afc & 2;
2326  has_payload = afc & 1;
2327  is_discontinuity = has_adaptation &&
2328  packet[4] != 0 && /* with length > 0 */
2329  (packet[5] & 0x80); /* and discontinuity indicated */
2330 
2331  /* continuity check (currently not used) */
2332  cc = (packet[3] & 0xf);
2333  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2334  cc_ok = pid == 0x1FFF || // null packet PID
2335  is_discontinuity ||
2336  tss->last_cc < 0 ||
2337  expected_cc == cc;
2338 
2339  tss->last_cc = cc;
2340  if (!cc_ok) {
2341  av_log(ts->stream, AV_LOG_DEBUG,
2342  "Continuity check failed for pid %d expected %d got %d\n",
2343  pid, expected_cc, cc);
2344  if (tss->type == MPEGTS_PES) {
2345  PESContext *pc = tss->u.pes_filter.opaque;
2346  pc->flags |= AV_PKT_FLAG_CORRUPT;
2347  }
2348  }
2349 
2350  if (packet[1] & 0x80) {
2351  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2352  if (tss->type == MPEGTS_PES) {
2353  PESContext *pc = tss->u.pes_filter.opaque;
2354  pc->flags |= AV_PKT_FLAG_CORRUPT;
2355  }
2356  }
2357 
2358  p = packet + 4;
2359  if (has_adaptation) {
2360  int64_t pcr_h;
2361  int pcr_l;
2362  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2363  tss->last_pcr = pcr_h * 300 + pcr_l;
2364  /* skip adaptation field */
2365  p += p[0] + 1;
2366  }
2367  /* if past the end of packet, ignore */
2368  p_end = packet + TS_PACKET_SIZE;
2369  if (p >= p_end || !has_payload)
2370  return 0;
2371 
2372  pos = avio_tell(ts->stream->pb);
2373  if (pos >= 0) {
2374  av_assert0(pos >= TS_PACKET_SIZE);
2375  ts->pos47_full = pos - TS_PACKET_SIZE;
2376  }
2377 
2378  if (tss->type == MPEGTS_SECTION) {
2379  if (is_start) {
2380  /* pointer field present */
2381  len = *p++;
2382  if (len > p_end - p)
2383  return 0;
2384  if (len && cc_ok) {
2385  /* write remaining section bytes */
2386  write_section_data(ts, tss,
2387  p, len, 0);
2388  /* check whether filter has been closed */
2389  if (!ts->pids[pid])
2390  return 0;
2391  }
2392  p += len;
2393  if (p < p_end) {
2394  write_section_data(ts, tss,
2395  p, p_end - p, 1);
2396  }
2397  } else {
2398  if (cc_ok) {
2399  write_section_data(ts, tss,
2400  p, p_end - p, 0);
2401  }
2402  }
2403 
2404  // stop find_stream_info from waiting for more streams
2405  // when all programs have received a PMT
2406  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2407  int i;
2408  for (i = 0; i < ts->nb_prg; i++) {
2409  if (!ts->prg[i].pmt_found)
2410  break;
2411  }
2412  if (i == ts->nb_prg && ts->nb_prg > 0) {
2413  int types = 0;
2414  for (i = 0; i < ts->stream->nb_streams; i++) {
2415  AVStream *st = ts->stream->streams[i];
2416  if (st->codecpar->codec_type >= 0)
2417  types |= 1<<st->codecpar->codec_type;
2418  }
2419  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2420  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2422  }
2423  }
2424  }
2425 
2426  } else {
2427  int ret;
2428  // Note: The position here points actually behind the current packet.
2429  if (tss->type == MPEGTS_PES) {
2430  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2431  pos - ts->raw_packet_size)) < 0)
2432  return ret;
2433  }
2434  }
2435 
2436  return 0;
2437 }
2438 
2439 static void reanalyze(MpegTSContext *ts) {
2440  AVIOContext *pb = ts->stream->pb;
2441  int64_t pos = avio_tell(pb);
2442  if (pos < 0)
2443  return;
2444  pos -= ts->pos47_full;
2445  if (pos == TS_PACKET_SIZE) {
2446  ts->size_stat[0] ++;
2447  } else if (pos == TS_DVHS_PACKET_SIZE) {
2448  ts->size_stat[1] ++;
2449  } else if (pos == TS_FEC_PACKET_SIZE) {
2450  ts->size_stat[2] ++;
2451  }
2452 
2453  ts->size_stat_count ++;
2455  int newsize = 0;
2456  if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2457  newsize = TS_PACKET_SIZE;
2458  } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2459  newsize = TS_DVHS_PACKET_SIZE;
2460  } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2461  newsize = TS_FEC_PACKET_SIZE;
2462  }
2463  if (newsize && newsize != ts->raw_packet_size) {
2464  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2465  ts->raw_packet_size = newsize;
2466  }
2467  ts->size_stat_count = 0;
2468  memset(ts->size_stat, 0, sizeof(ts->size_stat));
2469  }
2470 }
2471 
2472 /* XXX: try to find a better synchro over several packets (use
2473  * get_packet_size() ?) */
2474 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2475 {
2476  MpegTSContext *ts = s->priv_data;
2477  AVIOContext *pb = s->pb;
2478  int c, i;
2479  uint64_t pos = avio_tell(pb);
2480 
2481  avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2482 
2483  //Special case for files like 01c56b0dc1.ts
2484  if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2485  avio_seek(pb, 12, SEEK_CUR);
2486  return 0;
2487  }
2488 
2489  for (i = 0; i < ts->resync_size; i++) {
2490  c = avio_r8(pb);
2491  if (avio_feof(pb))
2492  return AVERROR_EOF;
2493  if (c == 0x47) {
2494  avio_seek(pb, -1, SEEK_CUR);
2495  reanalyze(s->priv_data);
2496  return 0;
2497  }
2498  }
2499  av_log(s, AV_LOG_ERROR,
2500  "max resync size reached, could not find sync byte\n");
2501  /* no sync found */
2502  return AVERROR_INVALIDDATA;
2503 }
2504 
2505 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2506 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2507  const uint8_t **data)
2508 {
2509  AVIOContext *pb = s->pb;
2510  int len;
2511 
2512  for (;;) {
2513  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2514  if (len != TS_PACKET_SIZE)
2515  return len < 0 ? len : AVERROR_EOF;
2516  /* check packet sync byte */
2517  if ((*data)[0] != 0x47) {
2518  /* find a new packet start */
2519 
2520  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2521  return AVERROR(EAGAIN);
2522  else
2523  continue;
2524  } else {
2525  break;
2526  }
2527  }
2528  return 0;
2529 }
2530 
2531 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2532 {
2533  AVIOContext *pb = s->pb;
2534  int skip = raw_packet_size - TS_PACKET_SIZE;
2535  if (skip > 0)
2536  avio_skip(pb, skip);
2537 }
2538 
2539 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2540 {
2541  AVFormatContext *s = ts->stream;
2543  const uint8_t *data;
2544  int64_t packet_num;
2545  int ret = 0;
2546 
2547  if (avio_tell(s->pb) != ts->last_pos) {
2548  int i;
2549  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2550  /* seek detected, flush pes buffer */
2551  for (i = 0; i < NB_PID_MAX; i++) {
2552  if (ts->pids[i]) {
2553  if (ts->pids[i]->type == MPEGTS_PES) {
2554  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2555  av_buffer_unref(&pes->buffer);
2556  pes->data_index = 0;
2557  pes->state = MPEGTS_SKIP; /* skip until pes header */
2558  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2559  ts->pids[i]->u.section_filter.last_ver = -1;
2560  }
2561  ts->pids[i]->last_cc = -1;
2562  ts->pids[i]->last_pcr = -1;
2563  }
2564  }
2565  }
2566 
2567  ts->stop_parse = 0;
2568  packet_num = 0;
2569  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2570  for (;;) {
2571  packet_num++;
2572  if (nb_packets != 0 && packet_num >= nb_packets ||
2573  ts->stop_parse > 1) {
2574  ret = AVERROR(EAGAIN);
2575  break;
2576  }
2577  if (ts->stop_parse > 0)
2578  break;
2579 
2580  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2581  if (ret != 0)
2582  break;
2583  ret = handle_packet(ts, data);
2585  if (ret != 0)
2586  break;
2587  }
2588  ts->last_pos = avio_tell(s->pb);
2589  return ret;
2590 }
2591 
2593 {
2594  const int size = p->buf_size;
2595  int maxscore = 0;
2596  int sumscore = 0;
2597  int i;
2598  int check_count = size / TS_FEC_PACKET_SIZE;
2599 #define CHECK_COUNT 10
2600 #define CHECK_BLOCK 100
2601 
2602  if (!check_count)
2603  return 0;
2604 
2605  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2606  int left = FFMIN(check_count - i, CHECK_BLOCK);
2607  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2608  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2609  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2610  score = FFMAX3(score, dvhs_score, fec_score);
2611  sumscore += score;
2612  maxscore = FFMAX(maxscore, score);
2613  }
2614 
2615  sumscore = sumscore * CHECK_COUNT / check_count;
2616  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2617 
2618  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2619 
2620  if (check_count > CHECK_COUNT && sumscore > 6) {
2621  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2622  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2623  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2624  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2625  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2626  } else if (sumscore > 6) {
2627  return 2;
2628  } else {
2629  return 0;
2630  }
2631 }
2632 
2633 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2634  * (-1) if not available */
2635 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2636 {
2637  int afc, len, flags;
2638  const uint8_t *p;
2639  unsigned int v;
2640 
2641  afc = (packet[3] >> 4) & 3;
2642  if (afc <= 1)
2643  return AVERROR_INVALIDDATA;
2644  p = packet + 4;
2645  len = p[0];
2646  p++;
2647  if (len == 0)
2648  return AVERROR_INVALIDDATA;
2649  flags = *p++;
2650  len--;
2651  if (!(flags & 0x10))
2652  return AVERROR_INVALIDDATA;
2653  if (len < 6)
2654  return AVERROR_INVALIDDATA;
2655  v = AV_RB32(p);
2656  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2657  *ppcr_low = ((p[4] & 1) << 8) | p[5];
2658  return 0;
2659 }
2660 
2661 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2662 
2663  /* NOTE: We attempt to seek on non-seekable files as well, as the
2664  * probe buffer usually is big enough. Only warn if the seek failed
2665  * on files where the seek should work. */
2666  if (avio_seek(pb, pos, SEEK_SET) < 0)
2667  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2668 }
2669 
2671 {
2672  MpegTSContext *ts = s->priv_data;
2673  AVIOContext *pb = s->pb;
2674  uint8_t buf[8 * 1024] = {0};
2675  int len;
2676  int64_t pos, probesize = s->probesize;
2677 
2679 
2680  if (ffio_ensure_seekback(pb, probesize) < 0)
2681  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2682 
2683  /* read the first 8192 bytes to get packet size */
2684  pos = avio_tell(pb);
2685  len = avio_read(pb, buf, sizeof(buf));
2686  ts->raw_packet_size = get_packet_size(buf, len);
2687  if (ts->raw_packet_size <= 0) {
2688  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2690  }
2691  ts->stream = s;
2692  ts->auto_guess = 0;
2693 
2694  if (s->iformat == &ff_mpegts_demuxer) {
2695  /* normal demux */
2696 
2697  /* first do a scan to get all the services */
2698  seek_back(s, pb, pos);
2699 
2701 
2703 
2704  handle_packets(ts, probesize / ts->raw_packet_size);
2705  /* if could not find service, enable auto_guess */
2706 
2707  ts->auto_guess = 1;
2708 
2709  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2710 
2712  } else {
2713  AVStream *st;
2714  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2715  int64_t pcrs[2], pcr_h;
2716  int packet_count[2];
2717  uint8_t packet[TS_PACKET_SIZE];
2718  const uint8_t *data;
2719 
2720  /* only read packets */
2721 
2722  st = avformat_new_stream(s, NULL);
2723  if (!st)
2724  return AVERROR(ENOMEM);
2725  avpriv_set_pts_info(st, 60, 1, 27000000);
2728 
2729  /* we iterate until we find two PCRs to estimate the bitrate */
2730  pcr_pid = -1;
2731  nb_pcrs = 0;
2732  nb_packets = 0;
2733  for (;;) {
2734  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2735  if (ret < 0)
2736  return ret;
2737  pid = AV_RB16(data + 1) & 0x1fff;
2738  if ((pcr_pid == -1 || pcr_pid == pid) &&
2739  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2741  pcr_pid = pid;
2742  packet_count[nb_pcrs] = nb_packets;
2743  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2744  nb_pcrs++;
2745  if (nb_pcrs >= 2) {
2746  if (pcrs[1] - pcrs[0] > 0) {
2747  /* the difference needs to be positive to make sense for bitrate computation */
2748  break;
2749  } else {
2750  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2751  pcrs[0] = pcrs[1];
2752  packet_count[0] = packet_count[1];
2753  nb_pcrs--;
2754  }
2755  }
2756  } else {
2758  }
2759  nb_packets++;
2760  }
2761 
2762  /* NOTE1: the bitrate is computed without the FEC */
2763  /* NOTE2: it is only the bitrate of the start of the stream */
2764  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2765  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2766  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2767  st->codecpar->bit_rate = s->bit_rate;
2768  st->start_time = ts->cur_pcr;
2769  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2770  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2771  }
2772 
2773  seek_back(s, pb, pos);
2774  return 0;
2775 }
2776 
2777 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2778 
2780 {
2781  MpegTSContext *ts = s->priv_data;
2782  int ret, i;
2783  int64_t pcr_h, next_pcr_h, pos;
2784  int pcr_l, next_pcr_l;
2785  uint8_t pcr_buf[12];
2786  const uint8_t *data;
2787 
2788  if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2789  return AVERROR(ENOMEM);
2790  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2791  pkt->pos = avio_tell(s->pb);
2792  if (ret < 0) {
2793  av_packet_unref(pkt);
2794  return ret;
2795  }
2796  if (data != pkt->data)
2797  memcpy(pkt->data, data, ts->raw_packet_size);
2799  if (ts->mpeg2ts_compute_pcr) {
2800  /* compute exact PCR for each packet */
2801  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2802  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2803  pos = avio_tell(s->pb);
2804  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2805  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2806  avio_read(s->pb, pcr_buf, 12);
2807  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2808  /* XXX: not precise enough */
2809  ts->pcr_incr =
2810  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2811  (i + 1);
2812  break;
2813  }
2814  }
2815  avio_seek(s->pb, pos, SEEK_SET);
2816  /* no next PCR found: we use previous increment */
2817  ts->cur_pcr = pcr_h * 300 + pcr_l;
2818  }
2819  pkt->pts = ts->cur_pcr;
2820  pkt->duration = ts->pcr_incr;
2821  ts->cur_pcr += ts->pcr_incr;
2822  }
2823  pkt->stream_index = 0;
2824  return 0;
2825 }
2826 
2828 {
2829  MpegTSContext *ts = s->priv_data;
2830  int ret, i;
2831 
2832  pkt->size = -1;
2833  ts->pkt = pkt;
2834  ret = handle_packets(ts, 0);
2835  if (ret < 0) {
2836  av_packet_unref(ts->pkt);
2837  /* flush pes data left */
2838  for (i = 0; i < NB_PID_MAX; i++)
2839  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2840  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2841  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2842  ret = new_pes_packet(pes, pkt);
2843  if (ret < 0)
2844  return ret;
2845  pes->state = MPEGTS_SKIP;
2846  ret = 0;
2847  break;
2848  }
2849  }
2850  }
2851 
2852  if (!ret && pkt->size < 0)
2853  ret = AVERROR_INVALIDDATA;
2854  return ret;
2855 }
2856 
2857 static void mpegts_free(MpegTSContext *ts)
2858 {
2859  int i;
2860 
2861  clear_programs(ts);
2862 
2863  for (i = 0; i < NB_PID_MAX; i++)
2864  if (ts->pids[i])
2865  mpegts_close_filter(ts, ts->pids[i]);
2866 }
2867 
2869 {
2870  MpegTSContext *ts = s->priv_data;
2871  mpegts_free(ts);
2872  return 0;
2873 }
2874 
2875 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2876  int64_t *ppos, int64_t pos_limit)
2877 {
2878  MpegTSContext *ts = s->priv_data;
2879  int64_t pos, timestamp;
2881  int pcr_l, pcr_pid =
2882  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2883  int pos47 = ts->pos47_full % ts->raw_packet_size;
2884  pos =
2885  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2886  ts->raw_packet_size + pos47;
2887  while(pos < pos_limit) {
2888  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2889  return AV_NOPTS_VALUE;
2890  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2891  return AV_NOPTS_VALUE;
2892  if (buf[0] != 0x47) {
2893  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2894  return AV_NOPTS_VALUE;
2895  pos = avio_tell(s->pb);
2896  continue;
2897  }
2898  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2899  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
2900  *ppos = pos;
2901  return timestamp;
2902  }
2903  pos += ts->raw_packet_size;
2904  }
2905 
2906  return AV_NOPTS_VALUE;
2907 }
2908 
2909 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2910  int64_t *ppos, int64_t pos_limit)
2911 {
2912  MpegTSContext *ts = s->priv_data;
2913  int64_t pos;
2914  int pos47 = ts->pos47_full % ts->raw_packet_size;
2915  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2917  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2918  return AV_NOPTS_VALUE;
2919  while(pos < pos_limit) {
2920  int ret;
2921  AVPacket pkt;
2922  av_init_packet(&pkt);
2923  ret = av_read_frame(s, &pkt);
2924  if (ret < 0)
2925  return AV_NOPTS_VALUE;
2926  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2927  ff_reduce_index(s, pkt.stream_index);
2928  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2929  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2930  int64_t dts = pkt.dts;
2931  *ppos = pkt.pos;
2932  av_packet_unref(&pkt);
2933  return dts;
2934  }
2935  }
2936  pos = pkt.pos;
2937  av_packet_unref(&pkt);
2938  }
2939 
2940  return AV_NOPTS_VALUE;
2941 }
2942 
2943 /**************************************************************/
2944 /* parsing functions - called from other demuxers such as RTP */
2945 
2947 {
2948  MpegTSContext *ts;
2949 
2950  ts = av_mallocz(sizeof(MpegTSContext));
2951  if (!ts)
2952  return NULL;
2953  /* no stream case, currently used by RTP */
2955  ts->stream = s;
2956  ts->auto_guess = 1;
2959 
2960  return ts;
2961 }
2962 
2963 /* return the consumed length if a packet was output, or -1 if no
2964  * packet is output */
2966  const uint8_t *buf, int len)
2967 {
2968  int len1;
2969 
2970  len1 = len;
2971  ts->pkt = pkt;
2972  for (;;) {
2973  ts->stop_parse = 0;
2974  if (len < TS_PACKET_SIZE)
2975  return AVERROR_INVALIDDATA;
2976  if (buf[0] != 0x47) {
2977  buf++;
2978  len--;
2979  } else {
2980  handle_packet(ts, buf);
2981  buf += TS_PACKET_SIZE;
2982  len -= TS_PACKET_SIZE;
2983  if (ts->stop_parse == 1)
2984  break;
2985  }
2986  }
2987  return len1 - len;
2988 }
2989 
2991 {
2992  mpegts_free(ts);
2993  av_free(ts);
2994 }
2995 
2996 AVInputFormat ff_mpegts_demuxer = {
2997  .name = "mpegts",
2998  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2999  .priv_data_size = sizeof(MpegTSContext),
3004  .read_timestamp = mpegts_get_dts,
3006  .priv_class = &mpegts_class,
3007 };
3008 
3010  .name = "mpegtsraw",
3011  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3012  .priv_data_size = sizeof(MpegTSContext),
3016  .read_timestamp = mpegts_get_dts,
3018  .priv_class = &mpegtsraw_class,
3019 };
const char * name
Definition: avisynth_c.h:775
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:2857
unsigned last_crc
Definition: mpegts.c:81
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1506
uint8_t last_sec_num
Definition: mpegts.c:604
#define NULL
Definition: coverity.c:32
#define SDT_PID
Definition: mpegts.h:37
int64_t pos47_full
Definition: mpegts.c:122
const char const char void * val
Definition: avisynth_c.h:771
int64_t last_pcr
Definition: mpegts.c:93
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
int es_id
Definition: mpegts.c:91
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define PES_START_SIZE
Definition: mpegts.c:219
#define PMT_TID
Definition: mpegts.h:41
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
int size
#define MP4ESDescrTag
Definition: isom.h:287
int total_size
Definition: mpegts.c:235
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:473
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2531
AVOption.
Definition: opt.h:246
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:133
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:284
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2039
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:2777
enum AVMediaType codec_type
Definition: mpegts.c:699
int64_t dts
Definition: mpegts.c:239
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1380
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
Definition: mpegts.c:2301
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1450
static void clear_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:274
#define AV_DICT_DONT_OVERWRITE
Don&#39;t overwrite existing entries.
Definition: dict.h:79
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4823
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:212
static int mpegts_probe(AVProbeData *p)
Definition: mpegts.c:2592
#define MP4ODescrTag
Definition: isom.h:285
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:158
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1083
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:2946
channels
Definition: aptx.c:30
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:547
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1175
int index
stream index in AVFormatContext
Definition: avformat.h:874
int size
Definition: avcodec.h:1431
MpegTSPESFilter pes_filter
Definition: mpegts.c:96
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
int prefer_codec_framerate
Definition: internal.h:146
uint8_t version
Definition: mpegts.c:602
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1793
enum AVMediaType codec_type
Definition: rtp.c:37
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1464
int size_stat_count
Definition: mpegts.c:119
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:832
Contain timestamp estimated through PCR of program stream.
Definition: avcodec.h:673
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:2996
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2213
void * priv_data
Definition: avformat.h:888
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:834
#define M4OD_TID
Definition: mpegts.h:42
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:668
discard all
Definition: avcodec.h:794
enum MpegTSFilterType type
Definition: mpegts.c:94
static AVPacket pkt
int pid
Definition: mpegts.c:224
struct Program * prg
Definition: mpegts.c:156
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2827
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:786
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1391
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:225
SLConfigDescr sl
Definition: mpegts.h:94
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2474
int packet_seq_num_len
Definition: mpegts.h:87
int es_id
Definition: mpegts.h:91
int inst_bitrate_len
Definition: mpegts.h:84
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:155
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:467
int last_cc
Definition: mpegts.c:92
Format I/O context.
Definition: avformat.h:1342
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2506
unsigned int nb_stream_indexes
Definition: avformat.h:1265
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
unsigned int pids[MAX_PIDS_PER_PROGRAM]
Definition: mpegts.c:105
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1918
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1967
#define SIZE_STAT_THRESHOLD
Definition: mpegts.c:120
Public dictionary API.
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:948
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:114
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:160
static char buffer[20]
Definition: seek.c:32
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:2670
AVFormatContext * s
Definition: mpegts.c:1315
uint8_t
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: avformat.h:1112
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:248
enum MpegTSState state
Definition: mpegts.c:231
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2909
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1286
AVOptions.
int size_stat[3]
Definition: mpegts.c:118
int au_seq_num_len
Definition: mpegts.h:86
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
int stop_parse
stop parsing loop
Definition: mpegts.c:138
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1394
static int discard_pid(MpegTSContext *ts, unsigned int pid)
discard_pid() decides if the pid is to be discarded according to caller&#39;s programs selection ...
Definition: mpegts.c:352
#define AV_RB32
Definition: intreadwrite.h:130
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:292
static int mpegts_push_data(MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
Definition: mpegts.c:1020
int id
Format-specific stream ID.
Definition: avformat.h:880
enum AVStreamParseType need_parsing
Definition: avformat.h:1091
int use_au_start
Definition: mpegts.h:74
static const AVOption raw_options[]
Definition: mpegts.c:189
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4453
int pmt_pid
Definition: avformat.h:1269
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1649
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:344
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Public header for CRC hash function implementation.
Mp4Descr * descr
Definition: mpegts.c:1317
const char data[16]
Definition: mxf.c:90
int ffio_read_indirect(AVIOContext *s, unsigned char *buf, int size, const unsigned char **data)
Read size bytes from AVIOContext, returning a pointer.
Definition: aviobuf.c:705
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1347
#define AV_DISPOSITION_DEPENDENT
dependent audio stream (mix_type=0 in mpegts)
Definition: avformat.h:857
uint8_t * data
Definition: avcodec.h:1430
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4552
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:200
MpegTSState
Definition: mpegts.c:210
static int flags
Definition: log.c:55
uint32_t tag
Definition: movenc.c:1468
#define ff_dlog(a,...)
#define AVERROR_EOF
End of file.
Definition: error.h:55
bitstream reader API header.
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int pid
Definition: mpegts.c:90
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
static const uint8_t header[24]
Definition: sdr2.c:67
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:2661
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1263
static int probe(AVProbeData *p)
Definition: act.c:36
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1289
unsigned int * stream_index
Definition: avformat.h:1264
int scan_all_pmts
Definition: mpegts.c:147
#define av_log(a,...)
#define PAT_TID
Definition: mpegts.h:40
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3913
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:505
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3009
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1325
MPEGTS stream ID, this is required to pass the stream ID information from the demuxer to the correspo...
Definition: avcodec.h:1318
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:810
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:375
enum AVCodecID codec_id
Definition: mpegts.c:700
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:456
AVBufferRef * buffer
Definition: mpegts.c:242
AVProgram * av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
Find the programs which belong to a given stream.
Definition: utils.c:4164
static const uint8_t opus_default_extradata[30]
Definition: opus.h:56
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:498
static void reanalyze(MpegTSContext *ts)
Definition: mpegts.c:2439
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const StreamType SCTE_types[]
Definition: mpegts.c:742
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1322
static const StreamType HDMV_types[]
Definition: mpegts.c:726
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:471
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:259
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:2868
unsigned int check_crc
Definition: mpegts.c:83
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2779
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1861
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1519
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:552
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1413
int pes_header_size
Definition: mpegts.c:236
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
Definition: codec_desc.c:3160
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1260
#define FFMAX(a, b)
Definition: common.h:94
static int64_t ff_parse_pes_pts(const uint8_t *buf)
Parse MPEG-PES five-byte timestamp.
Definition: mpeg.h:67
int timestamp_len
Definition: mpegts.h:81
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1415
int flags
copied to the AVPacket flags
Definition: mpegts.c:234
int program_num
Definition: avformat.h:1268
#define MAX_SECTION_SIZE
Definition: mpegts.h:33
int pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:134
int current_pid
Definition: mpegts.c:161
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3902
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:639
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:205
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:451
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1398
static const uint16_t fc[]
Definition: dcaenc.h:43
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4907
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3281
int64_t ts_packet_pos
position of first TS packet of this PES packet
Definition: mpegts.c:240
SectionCallback * section_cb
Definition: mpegts.c:85
static const StreamType REGD_types[]
Definition: mpegts.c:754
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
Definition: mpegts.c:64
#define FFMIN(a, b)
Definition: common.h:96
static const StreamType MISC_types[]
Definition: mpegts.c:748
uint16_t id
Definition: mpegts.c:601
static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
Definition: mpegts.c:333
static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int *descr_count, int max_descr_count)
Definition: mpegts.c:1540
#define TS_DVHS_PACKET_SIZE
Definition: mpegts.h:28
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
AVStream * st
Definition: mpegts.c:229
#define MP4IODescrTag
Definition: isom.h:286
AVFormatContext * stream
Definition: mpegts.c:114
int skip_changes
Definition: mpegts.c:144
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:392
static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:324
int ocr_len
Definition: mpegts.h:82
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:803
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:937
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1645
enum AVCodecID codec_id
Definition: vaapi_decode.c:362
static struct @271 state
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1471
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1429
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:128
static const AVClass mpegtsraw_class
Definition: mpegts.c:201
MpegTSSectionFilter section_filter
Definition: mpegts.c:97
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1641
#define CHECK_BLOCK
if(ret< 0)
Definition: vf_mcdeint.c:279
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:941
uint8_t sec_num
Definition: mpegts.c:603
int extended_stream_id
Definition: mpegts.c:237
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
int stream_type
Definition: mpegts.c:226
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:125
int raw_packet_size
raw packet size, including FEC if present
Definition: mpegts.c:116
static const StreamType ISO_types[]
Definition: mpegts.c:703
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
int ts_id
Transport stream id.
Definition: avformat.h:1680
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:833
Stream structure.
Definition: avformat.h:873
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:688
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2875
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define TS_MAX_PACKET_SIZE
Definition: mpegts.h:30
uint8_t * dec_config_descr
Definition: mpegts.h:93
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1223
unsigned int id
Definition: mpegts.c:103
#define MP4DecConfigDescrTag
Definition: isom.h:288
uint8_t stream_id
Definition: mpegts.c:238
static MpegTSFilter * mpegts_open_filter(MpegTSContext *ts, unsigned int pid, enum MpegTSFilterType type)
Definition: mpegts.c:457
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
#define hex_dump_debug(class, buf, size)
Definition: internal.h:41
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
static const StreamType METADATA_types[]
Definition: mpegts.c:770
int use_au_end
Definition: mpegts.h:75
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1357
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:901
int resync_size
Definition: mpegts.c:149
uint8_t * data
The data buffer.
Definition: buffer.h:89
static int get_packet_size(const uint8_t *buf, int size)
Definition: mpegts.c:576
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
void * buf
Definition: avisynth_c.h:690
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:221
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:618
#define MAX_LEVEL
Definition: mpegts.c:1313
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:101
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:321
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:2635
int use_timestamps
Definition: mpegts.h:78
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:314
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1963
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:433
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:192
cl_device_type type
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:2965
AVMediaType
Definition: avutil.h:199
refcounted data buffer API
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:526
static const StreamType DESC_types[]
Definition: mpegts.c:777
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int use_idle
Definition: mpegts.h:79
SLConfigDescr sl
Definition: mpegts.c:243
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1768
int dec_config_descr_len
Definition: mpegts.h:92
uint8_t * section_buf
Definition: mpegts.c:82
uint8_t tid
Definition: mpegts.c:600
AVDictionary * metadata
Definition: avformat.h:1266
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define MPEGTS_OPTIONS
Definition: mpegts.c:164
union MpegTSFilter::@229 u
unsigned int end_of_section_reached
Definition: mpegts.c:84
static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1, const uint8_t *buf, int buf_size, int is_start)
Assemble PES packets out of TS packets, and then call the "section_cb" function when they are complet...
Definition: mpegts.c:390
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type, const uint8_t **pp, const uint8_t *desc_list_end, Mp4Descr *mp4_descr, int mp4_descr_count, int pid, MpegTSContext *ts)
Parse an MPEG-2 descriptor.
Definition: mpegts.c:1660
static void clear_programs(MpegTSContext *ts)
Definition: mpegts.c:286
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:1052
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
A reference to a data buffer.
Definition: buffer.h:81
static const AVOption options[]
Definition: mpegts.c:167
full parsing and repack
Definition: avformat.h:793
AVFormatContext * stream
Definition: mpegts.c:228
int skip_clear
Definition: mpegts.c:145
Main libavformat public API header.
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2138
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:464
static const AVClass mpegts_class
Definition: mpegts.c:182
int use_rand_acc_pt
Definition: mpegts.h:76
int data_index
Definition: mpegts.c:233
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1187
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:912
static double c[64]
unsigned crc
Definition: mpegts.c:80
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:926
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:241
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:885
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:1957
#define MAX_PES_PAYLOAD
Definition: mpegts.c:45
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int pmt_found
have we found pmt for this program
Definition: mpegts.c:108
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1463
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1354
PESCallback * pes_cb
Definition: mpegts.c:68
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:607
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
static MpegTSFilter * mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
Definition: mpegts.c:480
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:686
unsigned int nb_pids
Definition: mpegts.c:104
void * opaque
Definition: mpegts.c:69
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:631
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1318
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:140
int len
#define PAT_PID
Definition: mpegts.h:36
void * priv_data
Format private data.
Definition: avformat.h:1370
int pcr_pid
Definition: avformat.h:1270
int64_t last_pos
to detect seek
Definition: mpegts.c:142
int timestamp_res
Definition: mpegts.h:80
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:289
#define PES_HEADER_SIZE
Definition: mpegts.c:220
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
Definition: mpegts.c:306
int64_t pts
Definition: mpegts.c:239
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3898
int use_padding
Definition: mpegts.h:77
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:172
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:74
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
FILE * out
Definition: movenc.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3888
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:521
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1619
int degr_prior_len
Definition: mpegts.h:85
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1368
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1556
AVIOContext pb
Definition: mpegts.c:1316
int stream_index
Definition: avcodec.h:1432
MpegTSFilterType
Definition: mpegts.c:56
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:47
#define MKTAG(a, b, c, d)
Definition: common.h:366
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:928
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:786
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:2990
int au_len
Definition: mpegts.h:83
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1124
This structure stores compressed data.
Definition: avcodec.h:1407
#define R8_CHECK_CLIP_MAX(dst, maxv)
uint32_t stream_type
Definition: mpegts.c:698
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:646
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
Definition: mpegts.c:894
#define FFMAX3(a, b, c)
Definition: common.h:95
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define av_unused
Definition: attributes.h:125
AVProgram ** programs
Definition: avformat.h:1520
#define MP4SLDescrTag
Definition: isom.h:290
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:131
#define NB_PID_MAX
Definition: mpegts.h:32
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2539
#define SDT_TID
Definition: mpegts.h:43
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:72
AVStream * sub_st
stream for the embedded AC3 stream in HDMV TrueHD
Definition: mpegts.c:230
MpegTSContext * ts
Definition: mpegts.c:227
static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int *descr_count, int max_descr_count)
Definition: mpegts.c:1524