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mpegts.c
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1 /*
2  * MPEG2 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 synchronisation if
42  * synchronisation 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 
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  int len;
395 
396  if (is_start) {
397  memcpy(tss->section_buf, buf, buf_size);
398  tss->section_index = buf_size;
399  tss->section_h_size = -1;
400  tss->end_of_section_reached = 0;
401  } else {
402  if (tss->end_of_section_reached)
403  return;
404  len = 4096 - tss->section_index;
405  if (buf_size < len)
406  len = buf_size;
407  memcpy(tss->section_buf + tss->section_index, buf, len);
408  tss->section_index += len;
409  }
410 
411  /* compute section length if possible */
412  if (tss->section_h_size == -1 && tss->section_index >= 3) {
413  len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
414  if (len > 4096)
415  return;
416  tss->section_h_size = len;
417  }
418 
419  if (tss->section_h_size != -1 &&
420  tss->section_index >= tss->section_h_size) {
421  int crc_valid = 1;
422  tss->end_of_section_reached = 1;
423 
424  if (tss->check_crc) {
425  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
426  if (tss->section_h_size >= 4)
427  tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
428 
429  if (crc_valid) {
430  ts->crc_validity[ tss1->pid ] = 100;
431  }else if (ts->crc_validity[ tss1->pid ] > -10) {
432  ts->crc_validity[ tss1->pid ]--;
433  }else
434  crc_valid = 2;
435  }
436  if (crc_valid) {
437  tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
438  if (crc_valid != 1)
439  tss->last_ver = -1;
440  }
441  }
442 }
443 
444 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
445  enum MpegTSFilterType type)
446 {
448 
449  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
450 
451  if (pid >= NB_PID_MAX || ts->pids[pid])
452  return NULL;
453  filter = av_mallocz(sizeof(MpegTSFilter));
454  if (!filter)
455  return NULL;
456  ts->pids[pid] = filter;
457 
458  filter->type = type;
459  filter->pid = pid;
460  filter->es_id = -1;
461  filter->last_cc = -1;
462  filter->last_pcr= -1;
463 
464  return filter;
465 }
466 
468  unsigned int pid,
469  SectionCallback *section_cb,
470  void *opaque,
471  int check_crc)
472 {
474  MpegTSSectionFilter *sec;
475 
476  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
477  return NULL;
478  sec = &filter->u.section_filter;
479  sec->section_cb = section_cb;
480  sec->opaque = opaque;
482  sec->check_crc = check_crc;
483  sec->last_ver = -1;
484 
485  if (!sec->section_buf) {
486  av_free(filter);
487  return NULL;
488  }
489  return filter;
490 }
491 
492 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
493  PESCallback *pes_cb,
494  void *opaque)
495 {
497  MpegTSPESFilter *pes;
498 
499  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
500  return NULL;
501 
502  pes = &filter->u.pes_filter;
503  pes->pes_cb = pes_cb;
504  pes->opaque = opaque;
505  return filter;
506 }
507 
508 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
509 {
510  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
511 }
512 
514 {
515  int pid;
516 
517  pid = filter->pid;
518  if (filter->type == MPEGTS_SECTION)
520  else if (filter->type == MPEGTS_PES) {
521  PESContext *pes = filter->u.pes_filter.opaque;
522  av_buffer_unref(&pes->buffer);
523  /* referenced private data will be freed later in
524  * avformat_close_input */
525  if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
526  av_freep(&filter->u.pes_filter.opaque);
527  }
528  }
529 
530  av_free(filter);
531  ts->pids[pid] = NULL;
532 }
533 
534 static int analyze(const uint8_t *buf, int size, int packet_size,
535  int probe)
536 {
537  int stat[TS_MAX_PACKET_SIZE];
538  int stat_all = 0;
539  int i;
540  int best_score = 0;
541 
542  memset(stat, 0, packet_size * sizeof(*stat));
543 
544  for (i = 0; i < size - 3; i++) {
545  if (buf[i] == 0x47 &&
546  (!probe || (buf[i + 3] & 0x30))) {
547  int x = i % packet_size;
548  stat[x]++;
549  stat_all++;
550  if (stat[x] > best_score) {
551  best_score = stat[x];
552  }
553  }
554  }
555 
556  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
557 }
558 
559 /* autodetect fec presence. Must have at least 1024 bytes */
560 static int get_packet_size(const uint8_t *buf, int size)
561 {
562  int score, fec_score, dvhs_score;
563 
564  if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
565  return AVERROR_INVALIDDATA;
566 
567  score = analyze(buf, size, TS_PACKET_SIZE, 0);
568  dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
569  fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
570  av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
571  score, dvhs_score, fec_score);
572 
573  if (score > fec_score && score > dvhs_score)
574  return TS_PACKET_SIZE;
575  else if (dvhs_score > score && dvhs_score > fec_score)
576  return TS_DVHS_PACKET_SIZE;
577  else if (score < fec_score && dvhs_score < fec_score)
578  return TS_FEC_PACKET_SIZE;
579  else
580  return AVERROR_INVALIDDATA;
581 }
582 
583 typedef struct SectionHeader {
585  uint16_t id;
589 } SectionHeader;
590 
592 {
593  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
594  return 1;
595 
596  tssf->last_ver = h->version;
597  tssf->last_crc = tssf->crc;
598 
599  return 0;
600 }
601 
602 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
603 {
604  const uint8_t *p;
605  int c;
606 
607  p = *pp;
608  if (p >= p_end)
609  return AVERROR_INVALIDDATA;
610  c = *p++;
611  *pp = p;
612  return c;
613 }
614 
615 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
616 {
617  const uint8_t *p;
618  int c;
619 
620  p = *pp;
621  if (1 >= p_end - p)
622  return AVERROR_INVALIDDATA;
623  c = AV_RB16(p);
624  p += 2;
625  *pp = p;
626  return c;
627 }
628 
629 /* read and allocate a DVB string preceded by its length */
630 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
631 {
632  int len;
633  const uint8_t *p;
634  char *str;
635 
636  p = *pp;
637  len = get8(&p, p_end);
638  if (len < 0)
639  return NULL;
640  if (len > p_end - p)
641  return NULL;
642  str = av_malloc(len + 1);
643  if (!str)
644  return NULL;
645  memcpy(str, p, len);
646  str[len] = '\0';
647  p += len;
648  *pp = p;
649  return str;
650 }
651 
653  const uint8_t **pp, const uint8_t *p_end)
654 {
655  int val;
656 
657  val = get8(pp, p_end);
658  if (val < 0)
659  return val;
660  h->tid = val;
661  *pp += 2;
662  val = get16(pp, p_end);
663  if (val < 0)
664  return val;
665  h->id = val;
666  val = get8(pp, p_end);
667  if (val < 0)
668  return val;
669  h->version = (val >> 1) & 0x1f;
670  val = get8(pp, p_end);
671  if (val < 0)
672  return val;
673  h->sec_num = val;
674  val = get8(pp, p_end);
675  if (val < 0)
676  return val;
677  h->last_sec_num = val;
678  return 0;
679 }
680 
681 typedef struct StreamType {
682  uint32_t stream_type;
685 } StreamType;
686 
687 static const StreamType ISO_types[] = {
694  /* Makito encoder sets stream type 0x11 for AAC,
695  * so auto-detect LOAS/LATM instead of hardcoding it. */
696 #if !CONFIG_LOAS_DEMUXER
697  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
698 #endif
706  { 0 },
707 };
708 
709 static const StreamType HDMV_types[] = {
715  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
716  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
717  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
718  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
721  { 0 },
722 };
723 
724 /* ATSC ? */
725 static const StreamType MISC_types[] = {
728  { 0 },
729 };
730 
731 static const StreamType REGD_types[] = {
732  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
733  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
734  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
735  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
736  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
737  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
738  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
739  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
740  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
741  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
742  { 0 },
743 };
744 
745 static const StreamType METADATA_types[] = {
746  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
747  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
748  { 0 },
749 };
750 
751 /* descriptor present */
752 static const StreamType DESC_types[] = {
753  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
754  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
757  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
758  { 0 },
759 };
760 
762  uint32_t stream_type,
763  const StreamType *types)
764 {
765  for (; types->stream_type; types++)
766  if (stream_type == types->stream_type) {
767  if (st->codecpar->codec_type != types->codec_type ||
768  st->codecpar->codec_id != types->codec_id) {
769  st->codecpar->codec_type = types->codec_type;
770  st->codecpar->codec_id = types->codec_id;
771  st->internal->need_context_update = 1;
772  }
773  st->request_probe = 0;
774  return;
775  }
776 }
777 
779  uint32_t stream_type, uint32_t prog_reg_desc)
780 {
781  int old_codec_type = st->codecpar->codec_type;
782  int old_codec_id = st->codecpar->codec_id;
783  int old_codec_tag = st->codecpar->codec_tag;
784 
785  if (avcodec_is_open(st->internal->avctx)) {
786  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
787  return 0;
788  }
789 
790  avpriv_set_pts_info(st, 33, 1, 90000);
791  st->priv_data = pes;
795  pes->st = st;
796  pes->stream_type = stream_type;
797 
798  av_log(pes->stream, AV_LOG_DEBUG,
799  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
800  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
801 
802  st->codecpar->codec_tag = pes->stream_type;
803 
804  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
805  if (pes->stream_type == 4)
806  st->request_probe = 50;
807  if ((prog_reg_desc == AV_RL32("HDMV") ||
808  prog_reg_desc == AV_RL32("HDPR")) &&
810  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
811  if (pes->stream_type == 0x83) {
812  // HDMV TrueHD streams also contain an AC3 coded version of the
813  // audio track - add a second stream for this
814  AVStream *sub_st;
815  // priv_data cannot be shared between streams
816  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
817  if (!sub_pes)
818  return AVERROR(ENOMEM);
819  memcpy(sub_pes, pes, sizeof(*sub_pes));
820 
821  sub_st = avformat_new_stream(pes->stream, NULL);
822  if (!sub_st) {
823  av_free(sub_pes);
824  return AVERROR(ENOMEM);
825  }
826 
827  sub_st->id = pes->pid;
828  avpriv_set_pts_info(sub_st, 33, 1, 90000);
829  sub_st->priv_data = sub_pes;
831  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
833  sub_pes->sub_st = pes->sub_st = sub_st;
834  }
835  }
836  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
837  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
838  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
839  st->codecpar->codec_id = old_codec_id;
840  st->codecpar->codec_type = old_codec_type;
841  }
842  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
843  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
844  st->probe_packets > 0 &&
845  stream_type == STREAM_TYPE_PRIVATE_DATA) {
849  }
850 
851  /* queue a context update if properties changed */
852  if (old_codec_type != st->codecpar->codec_type ||
853  old_codec_id != st->codecpar->codec_id ||
854  old_codec_tag != st->codecpar->codec_tag)
855  st->internal->need_context_update = 1;
856 
857  return 0;
858 }
859 
861 {
862  pes->pts = AV_NOPTS_VALUE;
863  pes->dts = AV_NOPTS_VALUE;
864  pes->data_index = 0;
865  pes->flags = 0;
866  av_buffer_unref(&pes->buffer);
867 }
868 
870 {
871  char *sd;
872 
873  av_init_packet(pkt);
874 
875  pkt->buf = pes->buffer;
876  pkt->data = pes->buffer->data;
877  pkt->size = pes->data_index;
878 
879  if (pes->total_size != MAX_PES_PAYLOAD &&
880  pes->pes_header_size + pes->data_index != pes->total_size +
881  PES_START_SIZE) {
882  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
883  pes->flags |= AV_PKT_FLAG_CORRUPT;
884  }
885  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
886 
887  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
888  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
889  pkt->stream_index = pes->sub_st->index;
890  else
891  pkt->stream_index = pes->st->index;
892  pkt->pts = pes->pts;
893  pkt->dts = pes->dts;
894  /* store position of first TS packet of this PES packet */
895  pkt->pos = pes->ts_packet_pos;
896  pkt->flags = pes->flags;
897 
898  pes->buffer = NULL;
900 
902  if (!sd)
903  return AVERROR(ENOMEM);
904  *sd = pes->stream_id;
905 
906  return 0;
907 }
908 
909 static uint64_t get_ts64(GetBitContext *gb, int bits)
910 {
911  if (get_bits_left(gb) < bits)
912  return AV_NOPTS_VALUE;
913  return get_bits64(gb, bits);
914 }
915 
917  const uint8_t *buf, int buf_size)
918 {
919  GetBitContext gb;
920  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
921  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
922  int dts_flag = -1, cts_flag = -1;
923  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
924  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
925  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
926 
927  memcpy(buf_padded, buf, buf_padded_size);
928 
929  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
930 
931  if (sl->use_au_start)
932  au_start_flag = get_bits1(&gb);
933  if (sl->use_au_end)
934  au_end_flag = get_bits1(&gb);
935  if (!sl->use_au_start && !sl->use_au_end)
936  au_start_flag = au_end_flag = 1;
937  if (sl->ocr_len > 0)
938  ocr_flag = get_bits1(&gb);
939  if (sl->use_idle)
940  idle_flag = get_bits1(&gb);
941  if (sl->use_padding)
942  padding_flag = get_bits1(&gb);
943  if (padding_flag)
944  padding_bits = get_bits(&gb, 3);
945 
946  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
947  if (sl->packet_seq_num_len)
949  if (sl->degr_prior_len)
950  if (get_bits1(&gb))
951  skip_bits(&gb, sl->degr_prior_len);
952  if (ocr_flag)
953  skip_bits_long(&gb, sl->ocr_len);
954  if (au_start_flag) {
955  if (sl->use_rand_acc_pt)
956  get_bits1(&gb);
957  if (sl->au_seq_num_len > 0)
958  skip_bits_long(&gb, sl->au_seq_num_len);
959  if (sl->use_timestamps) {
960  dts_flag = get_bits1(&gb);
961  cts_flag = get_bits1(&gb);
962  }
963  }
964  if (sl->inst_bitrate_len)
965  inst_bitrate_flag = get_bits1(&gb);
966  if (dts_flag == 1)
967  dts = get_ts64(&gb, sl->timestamp_len);
968  if (cts_flag == 1)
969  cts = get_ts64(&gb, sl->timestamp_len);
970  if (sl->au_len > 0)
971  skip_bits_long(&gb, sl->au_len);
972  if (inst_bitrate_flag)
974  }
975 
976  if (dts != AV_NOPTS_VALUE)
977  pes->dts = dts;
978  if (cts != AV_NOPTS_VALUE)
979  pes->pts = cts;
980 
981  if (sl->timestamp_len && sl->timestamp_res)
983 
984  return (get_bits_count(&gb) + 7) >> 3;
985 }
986 
987 /* return non zero if a packet could be constructed */
989  const uint8_t *buf, int buf_size, int is_start,
990  int64_t pos)
991 {
992  PESContext *pes = filter->u.pes_filter.opaque;
993  MpegTSContext *ts = pes->ts;
994  const uint8_t *p;
995  int ret, len, code;
996 
997  if (!ts->pkt)
998  return 0;
999 
1000  if (is_start) {
1001  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1002  ret = new_pes_packet(pes, ts->pkt);
1003  if (ret < 0)
1004  return ret;
1005  ts->stop_parse = 1;
1006  } else {
1008  }
1009  pes->state = MPEGTS_HEADER;
1010  pes->ts_packet_pos = pos;
1011  }
1012  p = buf;
1013  while (buf_size > 0) {
1014  switch (pes->state) {
1015  case MPEGTS_HEADER:
1016  len = PES_START_SIZE - pes->data_index;
1017  if (len > buf_size)
1018  len = buf_size;
1019  memcpy(pes->header + pes->data_index, p, len);
1020  pes->data_index += len;
1021  p += len;
1022  buf_size -= len;
1023  if (pes->data_index == PES_START_SIZE) {
1024  /* we got all the PES or section header. We can now
1025  * decide */
1026  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1027  pes->header[2] == 0x01) {
1028  /* it must be an mpeg2 PES stream */
1029  code = pes->header[3] | 0x100;
1030  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1031  code);
1032  pes->stream_id = pes->header[3];
1033 
1034  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1035  (!pes->sub_st ||
1036  pes->sub_st->discard == AVDISCARD_ALL)) ||
1037  code == 0x1be) /* padding_stream */
1038  goto skip;
1039 
1040  /* stream not present in PMT */
1041  if (!pes->st) {
1042  if (ts->skip_changes)
1043  goto skip;
1044 
1045  pes->st = avformat_new_stream(ts->stream, NULL);
1046  if (!pes->st)
1047  return AVERROR(ENOMEM);
1048  pes->st->id = pes->pid;
1049  mpegts_set_stream_info(pes->st, pes, 0, 0);
1050  }
1051 
1052  pes->total_size = AV_RB16(pes->header + 4);
1053  /* NOTE: a zero total size means the PES size is
1054  * unbounded */
1055  if (!pes->total_size)
1056  pes->total_size = MAX_PES_PAYLOAD;
1057 
1058  /* allocate pes buffer */
1059  pes->buffer = av_buffer_alloc(pes->total_size +
1061  if (!pes->buffer)
1062  return AVERROR(ENOMEM);
1063 
1064  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1065  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1066  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1067  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1068  pes->state = MPEGTS_PESHEADER;
1069  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1070  av_log(pes->stream, AV_LOG_TRACE,
1071  "pid=%x stream_type=%x probing\n",
1072  pes->pid,
1073  pes->stream_type);
1074  pes->st->request_probe = 1;
1075  }
1076  } else {
1077  pes->pes_header_size = 6;
1078  pes->state = MPEGTS_PAYLOAD;
1079  pes->data_index = 0;
1080  }
1081  } else {
1082  /* otherwise, it should be a table */
1083  /* skip packet */
1084 skip:
1085  pes->state = MPEGTS_SKIP;
1086  continue;
1087  }
1088  }
1089  break;
1090  /**********************************************/
1091  /* PES packing parsing */
1092  case MPEGTS_PESHEADER:
1093  len = PES_HEADER_SIZE - pes->data_index;
1094  if (len < 0)
1095  return AVERROR_INVALIDDATA;
1096  if (len > buf_size)
1097  len = buf_size;
1098  memcpy(pes->header + pes->data_index, p, len);
1099  pes->data_index += len;
1100  p += len;
1101  buf_size -= len;
1102  if (pes->data_index == PES_HEADER_SIZE) {
1103  pes->pes_header_size = pes->header[8] + 9;
1105  }
1106  break;
1107  case MPEGTS_PESHEADER_FILL:
1108  len = pes->pes_header_size - pes->data_index;
1109  if (len < 0)
1110  return AVERROR_INVALIDDATA;
1111  if (len > buf_size)
1112  len = buf_size;
1113  memcpy(pes->header + pes->data_index, p, len);
1114  pes->data_index += len;
1115  p += len;
1116  buf_size -= len;
1117  if (pes->data_index == pes->pes_header_size) {
1118  const uint8_t *r;
1119  unsigned int flags, pes_ext, skip;
1120 
1121  flags = pes->header[7];
1122  r = pes->header + 9;
1123  pes->pts = AV_NOPTS_VALUE;
1124  pes->dts = AV_NOPTS_VALUE;
1125  if ((flags & 0xc0) == 0x80) {
1126  pes->dts = pes->pts = ff_parse_pes_pts(r);
1127  r += 5;
1128  } else if ((flags & 0xc0) == 0xc0) {
1129  pes->pts = ff_parse_pes_pts(r);
1130  r += 5;
1131  pes->dts = ff_parse_pes_pts(r);
1132  r += 5;
1133  }
1134  pes->extended_stream_id = -1;
1135  if (flags & 0x01) { /* PES extension */
1136  pes_ext = *r++;
1137  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1138  skip = (pes_ext >> 4) & 0xb;
1139  skip += skip & 0x9;
1140  r += skip;
1141  if ((pes_ext & 0x41) == 0x01 &&
1142  (r + 2) <= (pes->header + pes->pes_header_size)) {
1143  /* PES extension 2 */
1144  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1145  pes->extended_stream_id = r[1];
1146  }
1147  }
1148 
1149  /* we got the full header. We parse it and get the payload */
1150  pes->state = MPEGTS_PAYLOAD;
1151  pes->data_index = 0;
1152  if (pes->stream_type == 0x12 && buf_size > 0) {
1153  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1154  buf_size);
1155  pes->pes_header_size += sl_header_bytes;
1156  p += sl_header_bytes;
1157  buf_size -= sl_header_bytes;
1158  }
1159  if (pes->stream_type == 0x15 && buf_size >= 5) {
1160  /* skip metadata access unit header */
1161  pes->pes_header_size += 5;
1162  p += 5;
1163  buf_size -= 5;
1164  }
1165  if ( pes->ts->fix_teletext_pts
1168  ) {
1169  AVProgram *p = NULL;
1170  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1171  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1172  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1173  if (f) {
1174  AVStream *st = NULL;
1175  if (f->type == MPEGTS_PES) {
1176  PESContext *pcrpes = f->u.pes_filter.opaque;
1177  if (pcrpes)
1178  st = pcrpes->st;
1179  } else if (f->type == MPEGTS_PCR) {
1180  int i;
1181  for (i = 0; i < p->nb_stream_indexes; i++) {
1182  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1183  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1184  st = pst;
1185  }
1186  }
1187  if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1188  // teletext packets do not always have correct timestamps,
1189  // the standard says they should be handled after 40.6 ms at most,
1190  // and the pcr error to this packet should be no more than 100 ms.
1191  // TODO: we should interpolate the PCR, not just use the last one
1192  int64_t pcr = f->last_pcr / 300;
1195  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1196  pes->pts = pes->dts = pcr;
1197  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1198  pes->dts > pcr + 3654 + 9000) {
1199  pes->pts = pes->dts = pcr + 3654 + 9000;
1200  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1201  pes->dts > pcr + 10*90000) { //10sec
1202  pes->pts = pes->dts = pcr + 3654 + 9000;
1203  }
1204  break;
1205  }
1206  }
1207  }
1208  }
1209  }
1210  }
1211  break;
1212  case MPEGTS_PAYLOAD:
1213  if (pes->buffer) {
1214  if (pes->data_index > 0 &&
1215  pes->data_index + buf_size > pes->total_size) {
1216  ret = new_pes_packet(pes, ts->pkt);
1217  if (ret < 0)
1218  return ret;
1219  pes->total_size = MAX_PES_PAYLOAD;
1220  pes->buffer = av_buffer_alloc(pes->total_size +
1222  if (!pes->buffer)
1223  return AVERROR(ENOMEM);
1224  ts->stop_parse = 1;
1225  } else if (pes->data_index == 0 &&
1226  buf_size > pes->total_size) {
1227  // pes packet size is < ts size packet and pes data is padded with 0xff
1228  // not sure if this is legal in ts but see issue #2392
1229  buf_size = pes->total_size;
1230  }
1231  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1232  pes->data_index += buf_size;
1233  /* emit complete packets with known packet size
1234  * decreases demuxer delay for infrequent packets like subtitles from
1235  * a couple of seconds to milliseconds for properly muxed files.
1236  * total_size is the number of bytes following pes_packet_length
1237  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1238  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1239  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1240  ts->stop_parse = 1;
1241  ret = new_pes_packet(pes, ts->pkt);
1242  if (ret < 0)
1243  return ret;
1244  }
1245  }
1246  buf_size = 0;
1247  break;
1248  case MPEGTS_SKIP:
1249  buf_size = 0;
1250  break;
1251  }
1252  }
1253 
1254  return 0;
1255 }
1256 
1257 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1258 {
1259  MpegTSFilter *tss;
1260  PESContext *pes;
1261 
1262  /* if no pid found, then add a pid context */
1263  pes = av_mallocz(sizeof(PESContext));
1264  if (!pes)
1265  return 0;
1266  pes->ts = ts;
1267  pes->stream = ts->stream;
1268  pes->pid = pid;
1269  pes->pcr_pid = pcr_pid;
1270  pes->state = MPEGTS_SKIP;
1271  pes->pts = AV_NOPTS_VALUE;
1272  pes->dts = AV_NOPTS_VALUE;
1273  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1274  if (!tss) {
1275  av_free(pes);
1276  return 0;
1277  }
1278  return pes;
1279 }
1280 
1281 #define MAX_LEVEL 4
1282 typedef struct MP4DescrParseContext {
1289  int level;
1292 
1294  const uint8_t *buf, unsigned size,
1295  Mp4Descr *descr, int max_descr_count)
1296 {
1297  int ret;
1298  if (size > (1 << 30))
1299  return AVERROR_INVALIDDATA;
1300 
1301  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1302  NULL, NULL, NULL, NULL)) < 0)
1303  return ret;
1304 
1305  d->s = s;
1306  d->level = 0;
1307  d->descr_count = 0;
1308  d->descr = descr;
1309  d->active_descr = NULL;
1310  d->max_descr_count = max_descr_count;
1311 
1312  return 0;
1313 }
1314 
1315 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1316 {
1317  int64_t new_off = avio_tell(pb);
1318  (*len) -= new_off - *off;
1319  *off = new_off;
1320 }
1321 
1322 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1323  int target_tag);
1324 
1325 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1326 {
1327  while (len > 0) {
1328  int ret = parse_mp4_descr(d, off, len, 0);
1329  if (ret < 0)
1330  return ret;
1331  update_offsets(&d->pb, &off, &len);
1332  }
1333  return 0;
1334 }
1335 
1336 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1337 {
1338  avio_rb16(&d->pb); // ID
1339  avio_r8(&d->pb);
1340  avio_r8(&d->pb);
1341  avio_r8(&d->pb);
1342  avio_r8(&d->pb);
1343  avio_r8(&d->pb);
1344  update_offsets(&d->pb, &off, &len);
1345  return parse_mp4_descr_arr(d, off, len);
1346 }
1347 
1348 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1349 {
1350  int id_flags;
1351  if (len < 2)
1352  return 0;
1353  id_flags = avio_rb16(&d->pb);
1354  if (!(id_flags & 0x0020)) { // URL_Flag
1355  update_offsets(&d->pb, &off, &len);
1356  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1357  } else {
1358  return 0;
1359  }
1360 }
1361 
1362 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1363 {
1364  int es_id = 0;
1365  int ret = 0;
1366 
1367  if (d->descr_count >= d->max_descr_count)
1368  return AVERROR_INVALIDDATA;
1369  ff_mp4_parse_es_descr(&d->pb, &es_id);
1370  d->active_descr = d->descr + (d->descr_count++);
1371 
1372  d->active_descr->es_id = es_id;
1373  update_offsets(&d->pb, &off, &len);
1374  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1375  return ret;
1376  update_offsets(&d->pb, &off, &len);
1377  if (len > 0)
1378  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1379  d->active_descr = NULL;
1380  return ret;
1381 }
1382 
1384  int len)
1385 {
1386  Mp4Descr *descr = d->active_descr;
1387  if (!descr)
1388  return AVERROR_INVALIDDATA;
1390  if (!descr->dec_config_descr)
1391  return AVERROR(ENOMEM);
1392  descr->dec_config_descr_len = len;
1393  avio_read(&d->pb, descr->dec_config_descr, len);
1394  return 0;
1395 }
1396 
1397 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1398 {
1399  Mp4Descr *descr = d->active_descr;
1400  int predefined;
1401  if (!descr)
1402  return AVERROR_INVALIDDATA;
1403 
1404  predefined = avio_r8(&d->pb);
1405  if (!predefined) {
1406  int lengths;
1407  int flags = avio_r8(&d->pb);
1408  descr->sl.use_au_start = !!(flags & 0x80);
1409  descr->sl.use_au_end = !!(flags & 0x40);
1410  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1411  descr->sl.use_padding = !!(flags & 0x08);
1412  descr->sl.use_timestamps = !!(flags & 0x04);
1413  descr->sl.use_idle = !!(flags & 0x02);
1414  descr->sl.timestamp_res = avio_rb32(&d->pb);
1415  avio_rb32(&d->pb);
1416  descr->sl.timestamp_len = avio_r8(&d->pb);
1417  if (descr->sl.timestamp_len > 64) {
1418  avpriv_request_sample(NULL, "timestamp_len > 64");
1419  descr->sl.timestamp_len = 64;
1420  return AVERROR_PATCHWELCOME;
1421  }
1422  descr->sl.ocr_len = avio_r8(&d->pb);
1423  descr->sl.au_len = avio_r8(&d->pb);
1424  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1425  lengths = avio_rb16(&d->pb);
1426  descr->sl.degr_prior_len = lengths >> 12;
1427  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1428  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1429  } else if (!d->predefined_SLConfigDescriptor_seen){
1430  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1432  }
1433  return 0;
1434 }
1435 
1436 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1437  int target_tag)
1438 {
1439  int tag;
1440  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1441  int ret = 0;
1442 
1443  update_offsets(&d->pb, &off, &len);
1444  if (len < 0 || len1 > len || len1 <= 0) {
1445  av_log(d->s, AV_LOG_ERROR,
1446  "Tag %x length violation new length %d bytes remaining %d\n",
1447  tag, len1, len);
1448  return AVERROR_INVALIDDATA;
1449  }
1450 
1451  if (d->level++ >= MAX_LEVEL) {
1452  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1453  ret = AVERROR_INVALIDDATA;
1454  goto done;
1455  }
1456 
1457  if (target_tag && tag != target_tag) {
1458  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1459  target_tag);
1460  ret = AVERROR_INVALIDDATA;
1461  goto done;
1462  }
1463 
1464  switch (tag) {
1465  case MP4IODescrTag:
1466  ret = parse_MP4IODescrTag(d, off, len1);
1467  break;
1468  case MP4ODescrTag:
1469  ret = parse_MP4ODescrTag(d, off, len1);
1470  break;
1471  case MP4ESDescrTag:
1472  ret = parse_MP4ESDescrTag(d, off, len1);
1473  break;
1474  case MP4DecConfigDescrTag:
1475  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1476  break;
1477  case MP4SLDescrTag:
1478  ret = parse_MP4SLDescrTag(d, off, len1);
1479  break;
1480  }
1481 
1482 
1483 done:
1484  d->level--;
1485  avio_seek(&d->pb, off + len1, SEEK_SET);
1486  return ret;
1487 }
1488 
1489 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1490  Mp4Descr *descr, int *descr_count, int max_descr_count)
1491 {
1493  int ret;
1494 
1495  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1496  if (ret < 0)
1497  return ret;
1498 
1499  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1500 
1501  *descr_count = d.descr_count;
1502  return ret;
1503 }
1504 
1505 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1506  Mp4Descr *descr, int *descr_count, int max_descr_count)
1507 {
1509  int ret;
1510 
1511  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1512  if (ret < 0)
1513  return ret;
1514 
1515  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1516 
1517  *descr_count = d.descr_count;
1518  return ret;
1519 }
1520 
1522  int section_len)
1523 {
1524  MpegTSContext *ts = filter->u.section_filter.opaque;
1525  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1526  SectionHeader h;
1527  const uint8_t *p, *p_end;
1528  AVIOContext pb;
1529  int mp4_descr_count = 0;
1530  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1531  int i, pid;
1532  AVFormatContext *s = ts->stream;
1533 
1534  p_end = section + section_len - 4;
1535  p = section;
1536  if (parse_section_header(&h, &p, p_end) < 0)
1537  return;
1538  if (h.tid != M4OD_TID)
1539  return;
1540  if (skip_identical(&h, tssf))
1541  return;
1542 
1543  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1545 
1546  for (pid = 0; pid < NB_PID_MAX; pid++) {
1547  if (!ts->pids[pid])
1548  continue;
1549  for (i = 0; i < mp4_descr_count; i++) {
1550  PESContext *pes;
1551  AVStream *st;
1552  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1553  continue;
1554  if (ts->pids[pid]->type != MPEGTS_PES) {
1555  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1556  continue;
1557  }
1558  pes = ts->pids[pid]->u.pes_filter.opaque;
1559  st = pes->st;
1560  if (!st)
1561  continue;
1562 
1563  pes->sl = mp4_descr[i].sl;
1564 
1565  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1566  mp4_descr[i].dec_config_descr_len, 0,
1567  NULL, NULL, NULL, NULL);
1568  ff_mp4_read_dec_config_descr(s, st, &pb);
1569  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1570  st->codecpar->extradata_size > 0)
1571  st->need_parsing = 0;
1572  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1573  st->codecpar->extradata_size > 0)
1574  st->need_parsing = 0;
1575 
1577  st->internal->need_context_update = 1;
1578  }
1579  }
1580  for (i = 0; i < mp4_descr_count; i++)
1581  av_free(mp4_descr[i].dec_config_descr);
1582 }
1583 
1585  1, 0, 1, 1, 2, 2, 2, 3, 3
1586 };
1587 
1588 static const uint8_t opus_stream_cnt[9] = {
1589  1, 1, 1, 2, 2, 3, 4, 4, 5,
1590 };
1591 
1592 static const uint8_t opus_channel_map[8][8] = {
1593  { 0 },
1594  { 0,1 },
1595  { 0,2,1 },
1596  { 0,1,2,3 },
1597  { 0,4,1,2,3 },
1598  { 0,4,1,2,3,5 },
1599  { 0,4,1,2,3,5,6 },
1600  { 0,6,1,2,3,4,5,7 },
1601 };
1602 
1604  const uint8_t **pp, const uint8_t *desc_list_end,
1605  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1606  MpegTSContext *ts)
1607 {
1608  const uint8_t *desc_end;
1609  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1610  char language[252];
1611  int i;
1612 
1613  desc_tag = get8(pp, desc_list_end);
1614  if (desc_tag < 0)
1615  return AVERROR_INVALIDDATA;
1616  desc_len = get8(pp, desc_list_end);
1617  if (desc_len < 0)
1618  return AVERROR_INVALIDDATA;
1619  desc_end = *pp + desc_len;
1620  if (desc_end > desc_list_end)
1621  return AVERROR_INVALIDDATA;
1622 
1623  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1624 
1625  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1626  stream_type == STREAM_TYPE_PRIVATE_DATA)
1627  mpegts_find_stream_type(st, desc_tag, DESC_types);
1628 
1629  switch (desc_tag) {
1630  case 0x1E: /* SL descriptor */
1631  desc_es_id = get16(pp, desc_end);
1632  if (desc_es_id < 0)
1633  break;
1634  if (ts && ts->pids[pid])
1635  ts->pids[pid]->es_id = desc_es_id;
1636  for (i = 0; i < mp4_descr_count; i++)
1637  if (mp4_descr[i].dec_config_descr_len &&
1638  mp4_descr[i].es_id == desc_es_id) {
1639  AVIOContext pb;
1640  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1641  mp4_descr[i].dec_config_descr_len, 0,
1642  NULL, NULL, NULL, NULL);
1643  ff_mp4_read_dec_config_descr(fc, st, &pb);
1644  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1645  st->codecpar->extradata_size > 0) {
1646  st->need_parsing = 0;
1647  st->internal->need_context_update = 1;
1648  }
1650  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1651  }
1652  break;
1653  case 0x1F: /* FMC descriptor */
1654  if (get16(pp, desc_end) < 0)
1655  break;
1656  if (mp4_descr_count > 0 &&
1658  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1659  st->request_probe > 0) &&
1660  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1661  AVIOContext pb;
1662  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1663  mp4_descr->dec_config_descr_len, 0,
1664  NULL, NULL, NULL, NULL);
1665  ff_mp4_read_dec_config_descr(fc, st, &pb);
1666  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1667  st->codecpar->extradata_size > 0) {
1668  st->request_probe = st->need_parsing = 0;
1670  st->internal->need_context_update = 1;
1671  }
1672  }
1673  break;
1674  case 0x56: /* DVB teletext descriptor */
1675  {
1676  uint8_t *extradata = NULL;
1677  int language_count = desc_len / 5;
1678 
1679  if (desc_len > 0 && desc_len % 5 != 0)
1680  return AVERROR_INVALIDDATA;
1681 
1682  if (language_count > 0) {
1683  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1684  av_assert0(language_count <= sizeof(language) / 4);
1685 
1686  if (st->codecpar->extradata == NULL) {
1687  if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1688  return AVERROR(ENOMEM);
1689  }
1690  }
1691 
1692  if (st->codecpar->extradata_size < language_count * 2)
1693  return AVERROR_INVALIDDATA;
1694 
1695  extradata = st->codecpar->extradata;
1696 
1697  for (i = 0; i < language_count; i++) {
1698  language[i * 4 + 0] = get8(pp, desc_end);
1699  language[i * 4 + 1] = get8(pp, desc_end);
1700  language[i * 4 + 2] = get8(pp, desc_end);
1701  language[i * 4 + 3] = ',';
1702 
1703  memcpy(extradata, *pp, 2);
1704  extradata += 2;
1705 
1706  *pp += 2;
1707  }
1708 
1709  language[i * 4 - 1] = 0;
1710  av_dict_set(&st->metadata, "language", language, 0);
1711  st->internal->need_context_update = 1;
1712  }
1713  }
1714  break;
1715  case 0x59: /* subtitling descriptor */
1716  {
1717  /* 8 bytes per DVB subtitle substream data:
1718  * ISO_639_language_code (3 bytes),
1719  * subtitling_type (1 byte),
1720  * composition_page_id (2 bytes),
1721  * ancillary_page_id (2 bytes) */
1722  int language_count = desc_len / 8;
1723 
1724  if (desc_len > 0 && desc_len % 8 != 0)
1725  return AVERROR_INVALIDDATA;
1726 
1727  if (language_count > 1) {
1728  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1729  }
1730 
1731  if (language_count > 0) {
1732  uint8_t *extradata;
1733 
1734  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1735  av_assert0(language_count <= sizeof(language) / 4);
1736 
1737  if (st->codecpar->extradata == NULL) {
1738  if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1739  return AVERROR(ENOMEM);
1740  }
1741  }
1742 
1743  if (st->codecpar->extradata_size < language_count * 5)
1744  return AVERROR_INVALIDDATA;
1745 
1746  extradata = st->codecpar->extradata;
1747 
1748  for (i = 0; i < language_count; i++) {
1749  language[i * 4 + 0] = get8(pp, desc_end);
1750  language[i * 4 + 1] = get8(pp, desc_end);
1751  language[i * 4 + 2] = get8(pp, desc_end);
1752  language[i * 4 + 3] = ',';
1753 
1754  /* hearing impaired subtitles detection using subtitling_type */
1755  switch (*pp[0]) {
1756  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1757  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1758  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1759  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1760  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1761  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1763  break;
1764  }
1765 
1766  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1767  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1768  extradata += 5;
1769 
1770  *pp += 4;
1771  }
1772 
1773  language[i * 4 - 1] = 0;
1774  av_dict_set(&st->metadata, "language", language, 0);
1775  st->internal->need_context_update = 1;
1776  }
1777  }
1778  break;
1779  case 0x0a: /* ISO 639 language descriptor */
1780  for (i = 0; i + 4 <= desc_len; i += 4) {
1781  language[i + 0] = get8(pp, desc_end);
1782  language[i + 1] = get8(pp, desc_end);
1783  language[i + 2] = get8(pp, desc_end);
1784  language[i + 3] = ',';
1785  switch (get8(pp, desc_end)) {
1786  case 0x01:
1788  break;
1789  case 0x02:
1791  break;
1792  case 0x03:
1794  break;
1795  }
1796  }
1797  if (i && language[0]) {
1798  language[i - 1] = 0;
1799  av_dict_set(&st->metadata, "language", language, 0);
1800  }
1801  break;
1802  case 0x05: /* registration descriptor */
1803  st->codecpar->codec_tag = bytestream_get_le32(pp);
1804  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1805  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0)
1806  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1807  break;
1808  case 0x52: /* stream identifier descriptor */
1809  st->stream_identifier = 1 + get8(pp, desc_end);
1810  break;
1811  case 0x26: /* metadata descriptor */
1812  if (get16(pp, desc_end) == 0xFFFF)
1813  *pp += 4;
1814  if (get8(pp, desc_end) == 0xFF) {
1815  st->codecpar->codec_tag = bytestream_get_le32(pp);
1816  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1817  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1818  }
1819  break;
1820  case 0x7f: /* DVB extension descriptor */
1821  ext_desc_tag = get8(pp, desc_end);
1822  if (ext_desc_tag < 0)
1823  return AVERROR_INVALIDDATA;
1824  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1825  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1826  if (!st->codecpar->extradata) {
1829  if (!st->codecpar->extradata)
1830  return AVERROR(ENOMEM);
1831 
1834 
1835  channel_config_code = get8(pp, desc_end);
1836  if (channel_config_code < 0)
1837  return AVERROR_INVALIDDATA;
1838  if (channel_config_code <= 0x8) {
1839  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1840  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1841  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1842  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1843  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1844  } else {
1845  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1846  }
1848  st->internal->need_context_update = 1;
1849  }
1850  }
1851  break;
1852  default:
1853  break;
1854  }
1855  *pp = desc_end;
1856  return 0;
1857 }
1858 
1859 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1860 {
1861  MpegTSContext *ts = filter->u.section_filter.opaque;
1862  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1863  SectionHeader h1, *h = &h1;
1864  PESContext *pes;
1865  AVStream *st;
1866  const uint8_t *p, *p_end, *desc_list_end;
1867  int program_info_length, pcr_pid, pid, stream_type;
1868  int desc_list_len;
1869  uint32_t prog_reg_desc = 0; /* registration descriptor */
1870 
1871  int mp4_descr_count = 0;
1872  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1873  int i;
1874 
1875  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1876  hex_dump_debug(ts->stream, section, section_len);
1877 
1878  p_end = section + section_len - 4;
1879  p = section;
1880  if (parse_section_header(h, &p, p_end) < 0)
1881  return;
1882  if (skip_identical(h, tssf))
1883  return;
1884 
1885  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1886  h->id, h->sec_num, h->last_sec_num, h->version);
1887 
1888  if (h->tid != PMT_TID)
1889  return;
1890  if (!ts->scan_all_pmts && ts->skip_changes)
1891  return;
1892 
1893  if (!ts->skip_clear)
1894  clear_program(ts, h->id);
1895 
1896  pcr_pid = get16(&p, p_end);
1897  if (pcr_pid < 0)
1898  return;
1899  pcr_pid &= 0x1fff;
1900  add_pid_to_pmt(ts, h->id, pcr_pid);
1901  set_pcr_pid(ts->stream, h->id, pcr_pid);
1902 
1903  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1904 
1905  program_info_length = get16(&p, p_end);
1906  if (program_info_length < 0)
1907  return;
1908  program_info_length &= 0xfff;
1909  while (program_info_length >= 2) {
1910  uint8_t tag, len;
1911  tag = get8(&p, p_end);
1912  len = get8(&p, p_end);
1913 
1914  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1915 
1916  if (len > program_info_length - 2)
1917  // something else is broken, exit the program_descriptors_loop
1918  break;
1919  program_info_length -= len + 2;
1920  if (tag == 0x1d) { // IOD descriptor
1921  get8(&p, p_end); // scope
1922  get8(&p, p_end); // label
1923  len -= 2;
1924  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1925  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1926  } else if (tag == 0x05 && len >= 4) { // registration descriptor
1927  prog_reg_desc = bytestream_get_le32(&p);
1928  len -= 4;
1929  }
1930  p += len;
1931  }
1932  p += program_info_length;
1933  if (p >= p_end)
1934  goto out;
1935 
1936  // stop parsing after pmt, we found header
1937  if (!ts->stream->nb_streams)
1938  ts->stop_parse = 2;
1939 
1940  set_pmt_found(ts, h->id);
1941 
1942 
1943  for (;;) {
1944  st = 0;
1945  pes = NULL;
1946  stream_type = get8(&p, p_end);
1947  if (stream_type < 0)
1948  break;
1949  pid = get16(&p, p_end);
1950  if (pid < 0)
1951  goto out;
1952  pid &= 0x1fff;
1953  if (pid == ts->current_pid)
1954  goto out;
1955 
1956  /* now create stream */
1957  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1958  pes = ts->pids[pid]->u.pes_filter.opaque;
1959  if (!pes->st) {
1960  pes->st = avformat_new_stream(pes->stream, NULL);
1961  if (!pes->st)
1962  goto out;
1963  pes->st->id = pes->pid;
1964  }
1965  st = pes->st;
1966  } else if (stream_type != 0x13) {
1967  if (ts->pids[pid])
1968  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1969  pes = add_pes_stream(ts, pid, pcr_pid);
1970  if (pes) {
1971  st = avformat_new_stream(pes->stream, NULL);
1972  if (!st)
1973  goto out;
1974  st->id = pes->pid;
1975  }
1976  } else {
1977  int idx = ff_find_stream_index(ts->stream, pid);
1978  if (idx >= 0) {
1979  st = ts->stream->streams[idx];
1980  } else {
1981  st = avformat_new_stream(ts->stream, NULL);
1982  if (!st)
1983  goto out;
1984  st->id = pid;
1986  }
1987  }
1988 
1989  if (!st)
1990  goto out;
1991 
1992  if (pes && !pes->stream_type)
1993  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1994 
1995  add_pid_to_pmt(ts, h->id, pid);
1996 
1998 
1999  desc_list_len = get16(&p, p_end);
2000  if (desc_list_len < 0)
2001  goto out;
2002  desc_list_len &= 0xfff;
2003  desc_list_end = p + desc_list_len;
2004  if (desc_list_end > p_end)
2005  goto out;
2006  for (;;) {
2007  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2008  desc_list_end, mp4_descr,
2009  mp4_descr_count, pid, ts) < 0)
2010  break;
2011 
2012  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2013  stream_type == 0x83 && pes->sub_st) {
2015  pes->sub_st->index);
2016  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2017  }
2018  }
2019  p = desc_list_end;
2020  }
2021 
2022  if (!ts->pids[pcr_pid])
2023  mpegts_open_pcr_filter(ts, pcr_pid);
2024 
2025 out:
2026  for (i = 0; i < mp4_descr_count; i++)
2027  av_free(mp4_descr[i].dec_config_descr);
2028 }
2029 
2030 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2031 {
2032  MpegTSContext *ts = filter->u.section_filter.opaque;
2033  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2034  SectionHeader h1, *h = &h1;
2035  const uint8_t *p, *p_end;
2036  int sid, pmt_pid;
2037  AVProgram *program;
2038 
2039  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2040  hex_dump_debug(ts->stream, section, section_len);
2041 
2042  p_end = section + section_len - 4;
2043  p = section;
2044  if (parse_section_header(h, &p, p_end) < 0)
2045  return;
2046  if (h->tid != PAT_TID)
2047  return;
2048  if (ts->skip_changes)
2049  return;
2050 
2051  if (skip_identical(h, tssf))
2052  return;
2053  ts->stream->ts_id = h->id;
2054 
2055  clear_programs(ts);
2056  for (;;) {
2057  sid = get16(&p, p_end);
2058  if (sid < 0)
2059  break;
2060  pmt_pid = get16(&p, p_end);
2061  if (pmt_pid < 0)
2062  break;
2063  pmt_pid &= 0x1fff;
2064 
2065  if (pmt_pid == ts->current_pid)
2066  break;
2067 
2068  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2069 
2070  if (sid == 0x0000) {
2071  /* NIT info */
2072  } else {
2073  MpegTSFilter *fil = ts->pids[pmt_pid];
2074  program = av_new_program(ts->stream, sid);
2075  if (program) {
2076  program->program_num = sid;
2077  program->pmt_pid = pmt_pid;
2078  }
2079  if (fil)
2080  if ( fil->type != MPEGTS_SECTION
2081  || fil->pid != pmt_pid
2082  || fil->u.section_filter.section_cb != pmt_cb)
2083  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2084 
2085  if (!ts->pids[pmt_pid])
2086  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2087  add_pat_entry(ts, sid);
2088  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2089  add_pid_to_pmt(ts, sid, pmt_pid);
2090  }
2091  }
2092 
2093  if (sid < 0) {
2094  int i,j;
2095  for (j=0; j<ts->stream->nb_programs; j++) {
2096  for (i = 0; i < ts->nb_prg; i++)
2097  if (ts->prg[i].id == ts->stream->programs[j]->id)
2098  break;
2099  if (i==ts->nb_prg && !ts->skip_clear)
2100  clear_avprogram(ts, ts->stream->programs[j]->id);
2101  }
2102  }
2103 }
2104 
2105 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2106 {
2107  MpegTSContext *ts = filter->u.section_filter.opaque;
2108  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2109  SectionHeader h1, *h = &h1;
2110  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2111  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2112  char *name, *provider_name;
2113 
2114  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2115  hex_dump_debug(ts->stream, section, section_len);
2116 
2117  p_end = section + section_len - 4;
2118  p = section;
2119  if (parse_section_header(h, &p, p_end) < 0)
2120  return;
2121  if (h->tid != SDT_TID)
2122  return;
2123  if (ts->skip_changes)
2124  return;
2125  if (skip_identical(h, tssf))
2126  return;
2127 
2128  onid = get16(&p, p_end);
2129  if (onid < 0)
2130  return;
2131  val = get8(&p, p_end);
2132  if (val < 0)
2133  return;
2134  for (;;) {
2135  sid = get16(&p, p_end);
2136  if (sid < 0)
2137  break;
2138  val = get8(&p, p_end);
2139  if (val < 0)
2140  break;
2141  desc_list_len = get16(&p, p_end);
2142  if (desc_list_len < 0)
2143  break;
2144  desc_list_len &= 0xfff;
2145  desc_list_end = p + desc_list_len;
2146  if (desc_list_end > p_end)
2147  break;
2148  for (;;) {
2149  desc_tag = get8(&p, desc_list_end);
2150  if (desc_tag < 0)
2151  break;
2152  desc_len = get8(&p, desc_list_end);
2153  desc_end = p + desc_len;
2154  if (desc_len < 0 || desc_end > desc_list_end)
2155  break;
2156 
2157  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2158  desc_tag, desc_len);
2159 
2160  switch (desc_tag) {
2161  case 0x48:
2162  service_type = get8(&p, p_end);
2163  if (service_type < 0)
2164  break;
2165  provider_name = getstr8(&p, p_end);
2166  if (!provider_name)
2167  break;
2168  name = getstr8(&p, p_end);
2169  if (name) {
2170  AVProgram *program = av_new_program(ts->stream, sid);
2171  if (program) {
2172  av_dict_set(&program->metadata, "service_name", name, 0);
2173  av_dict_set(&program->metadata, "service_provider",
2174  provider_name, 0);
2175  }
2176  }
2177  av_free(name);
2178  av_free(provider_name);
2179  break;
2180  default:
2181  break;
2182  }
2183  p = desc_end;
2184  }
2185  p = desc_list_end;
2186  }
2187 }
2188 
2189 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2190  const uint8_t *packet);
2191 
2192 /* handle one TS packet */
2193 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2194 {
2195  MpegTSFilter *tss;
2196  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2197  has_adaptation, has_payload;
2198  const uint8_t *p, *p_end;
2199  int64_t pos;
2200 
2201  pid = AV_RB16(packet + 1) & 0x1fff;
2202  if (pid && discard_pid(ts, pid))
2203  return 0;
2204  is_start = packet[1] & 0x40;
2205  tss = ts->pids[pid];
2206  if (ts->auto_guess && !tss && is_start) {
2207  add_pes_stream(ts, pid, -1);
2208  tss = ts->pids[pid];
2209  }
2210  if (!tss)
2211  return 0;
2212  ts->current_pid = pid;
2213 
2214  afc = (packet[3] >> 4) & 3;
2215  if (afc == 0) /* reserved value */
2216  return 0;
2217  has_adaptation = afc & 2;
2218  has_payload = afc & 1;
2219  is_discontinuity = has_adaptation &&
2220  packet[4] != 0 && /* with length > 0 */
2221  (packet[5] & 0x80); /* and discontinuity indicated */
2222 
2223  /* continuity check (currently not used) */
2224  cc = (packet[3] & 0xf);
2225  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2226  cc_ok = pid == 0x1FFF || // null packet PID
2227  is_discontinuity ||
2228  tss->last_cc < 0 ||
2229  expected_cc == cc;
2230 
2231  tss->last_cc = cc;
2232  if (!cc_ok) {
2233  av_log(ts->stream, AV_LOG_DEBUG,
2234  "Continuity check failed for pid %d expected %d got %d\n",
2235  pid, expected_cc, cc);
2236  if (tss->type == MPEGTS_PES) {
2237  PESContext *pc = tss->u.pes_filter.opaque;
2238  pc->flags |= AV_PKT_FLAG_CORRUPT;
2239  }
2240  }
2241 
2242  p = packet + 4;
2243  if (has_adaptation) {
2244  int64_t pcr_h;
2245  int pcr_l;
2246  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2247  tss->last_pcr = pcr_h * 300 + pcr_l;
2248  /* skip adaptation field */
2249  p += p[0] + 1;
2250  }
2251  /* if past the end of packet, ignore */
2252  p_end = packet + TS_PACKET_SIZE;
2253  if (p >= p_end || !has_payload)
2254  return 0;
2255 
2256  pos = avio_tell(ts->stream->pb);
2257  if (pos >= 0) {
2258  av_assert0(pos >= TS_PACKET_SIZE);
2259  ts->pos47_full = pos - TS_PACKET_SIZE;
2260  }
2261 
2262  if (tss->type == MPEGTS_SECTION) {
2263  if (is_start) {
2264  /* pointer field present */
2265  len = *p++;
2266  if (len > p_end - p)
2267  return 0;
2268  if (len && cc_ok) {
2269  /* write remaining section bytes */
2270  write_section_data(ts, tss,
2271  p, len, 0);
2272  /* check whether filter has been closed */
2273  if (!ts->pids[pid])
2274  return 0;
2275  }
2276  p += len;
2277  if (p < p_end) {
2278  write_section_data(ts, tss,
2279  p, p_end - p, 1);
2280  }
2281  } else {
2282  if (cc_ok) {
2283  write_section_data(ts, tss,
2284  p, p_end - p, 0);
2285  }
2286  }
2287 
2288  // stop find_stream_info from waiting for more streams
2289  // when all programs have received a PMT
2290  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2291  int i;
2292  for (i = 0; i < ts->nb_prg; i++) {
2293  if (!ts->prg[i].pmt_found)
2294  break;
2295  }
2296  if (i == ts->nb_prg && ts->nb_prg > 0) {
2297  int types = 0;
2298  for (i = 0; i < ts->stream->nb_streams; i++) {
2299  AVStream *st = ts->stream->streams[i];
2300  types |= 1<<st->codecpar->codec_type;
2301  }
2302  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2303  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2305  }
2306  }
2307  }
2308 
2309  } else {
2310  int ret;
2311  // Note: The position here points actually behind the current packet.
2312  if (tss->type == MPEGTS_PES) {
2313  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2314  pos - ts->raw_packet_size)) < 0)
2315  return ret;
2316  }
2317  }
2318 
2319  return 0;
2320 }
2321 
2322 static void reanalyze(MpegTSContext *ts) {
2323  AVIOContext *pb = ts->stream->pb;
2324  int64_t pos = avio_tell(pb);
2325  if (pos < 0)
2326  return;
2327  pos -= ts->pos47_full;
2328  if (pos == TS_PACKET_SIZE) {
2329  ts->size_stat[0] ++;
2330  } else if (pos == TS_DVHS_PACKET_SIZE) {
2331  ts->size_stat[1] ++;
2332  } else if (pos == TS_FEC_PACKET_SIZE) {
2333  ts->size_stat[2] ++;
2334  }
2335 
2336  ts->size_stat_count ++;
2338  int newsize = 0;
2339  if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2340  newsize = TS_PACKET_SIZE;
2341  } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2342  newsize = TS_DVHS_PACKET_SIZE;
2343  } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2344  newsize = TS_FEC_PACKET_SIZE;
2345  }
2346  if (newsize && newsize != ts->raw_packet_size) {
2347  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2348  ts->raw_packet_size = newsize;
2349  }
2350  ts->size_stat_count = 0;
2351  memset(ts->size_stat, 0, sizeof(ts->size_stat));
2352  }
2353 }
2354 
2355 /* XXX: try to find a better synchro over several packets (use
2356  * get_packet_size() ?) */
2357 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2358 {
2359  MpegTSContext *ts = s->priv_data;
2360  AVIOContext *pb = s->pb;
2361  int c, i;
2362  uint64_t pos = avio_tell(pb);
2363 
2364  avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2365 
2366  //Special case for files like 01c56b0dc1.ts
2367  if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2368  avio_seek(pb, 12, SEEK_CUR);
2369  return 0;
2370  }
2371 
2372  for (i = 0; i < ts->resync_size; i++) {
2373  c = avio_r8(pb);
2374  if (avio_feof(pb))
2375  return AVERROR_EOF;
2376  if (c == 0x47) {
2377  avio_seek(pb, -1, SEEK_CUR);
2378  reanalyze(s->priv_data);
2379  return 0;
2380  }
2381  }
2382  av_log(s, AV_LOG_ERROR,
2383  "max resync size reached, could not find sync byte\n");
2384  /* no sync found */
2385  return AVERROR_INVALIDDATA;
2386 }
2387 
2388 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2389 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2390  const uint8_t **data)
2391 {
2392  AVIOContext *pb = s->pb;
2393  int len;
2394 
2395  for (;;) {
2396  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2397  if (len != TS_PACKET_SIZE)
2398  return len < 0 ? len : AVERROR_EOF;
2399  /* check packet sync byte */
2400  if ((*data)[0] != 0x47) {
2401  /* find a new packet start */
2402 
2403  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2404  return AVERROR(EAGAIN);
2405  else
2406  continue;
2407  } else {
2408  break;
2409  }
2410  }
2411  return 0;
2412 }
2413 
2414 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2415 {
2416  AVIOContext *pb = s->pb;
2417  int skip = raw_packet_size - TS_PACKET_SIZE;
2418  if (skip > 0)
2419  avio_skip(pb, skip);
2420 }
2421 
2422 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2423 {
2424  AVFormatContext *s = ts->stream;
2426  const uint8_t *data;
2427  int64_t packet_num;
2428  int ret = 0;
2429 
2430  if (avio_tell(s->pb) != ts->last_pos) {
2431  int i;
2432  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2433  /* seek detected, flush pes buffer */
2434  for (i = 0; i < NB_PID_MAX; i++) {
2435  if (ts->pids[i]) {
2436  if (ts->pids[i]->type == MPEGTS_PES) {
2437  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2438  av_buffer_unref(&pes->buffer);
2439  pes->data_index = 0;
2440  pes->state = MPEGTS_SKIP; /* skip until pes header */
2441  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2442  ts->pids[i]->u.section_filter.last_ver = -1;
2443  }
2444  ts->pids[i]->last_cc = -1;
2445  ts->pids[i]->last_pcr = -1;
2446  }
2447  }
2448  }
2449 
2450  ts->stop_parse = 0;
2451  packet_num = 0;
2452  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2453  for (;;) {
2454  packet_num++;
2455  if (nb_packets != 0 && packet_num >= nb_packets ||
2456  ts->stop_parse > 1) {
2457  ret = AVERROR(EAGAIN);
2458  break;
2459  }
2460  if (ts->stop_parse > 0)
2461  break;
2462 
2463  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2464  if (ret != 0)
2465  break;
2466  ret = handle_packet(ts, data);
2468  if (ret != 0)
2469  break;
2470  }
2471  ts->last_pos = avio_tell(s->pb);
2472  return ret;
2473 }
2474 
2476 {
2477  const int size = p->buf_size;
2478  int maxscore = 0;
2479  int sumscore = 0;
2480  int i;
2481  int check_count = size / TS_FEC_PACKET_SIZE;
2482 #define CHECK_COUNT 10
2483 #define CHECK_BLOCK 100
2484 
2485  if (check_count < CHECK_COUNT)
2486  return 0;
2487 
2488  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2489  int left = FFMIN(check_count - i, CHECK_BLOCK);
2490  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2491  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2492  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2493  score = FFMAX3(score, dvhs_score, fec_score);
2494  sumscore += score;
2495  maxscore = FFMAX(maxscore, score);
2496  }
2497 
2498  sumscore = sumscore * CHECK_COUNT / check_count;
2499  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2500 
2501  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2502 
2503  if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2504  else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2505  else
2506  return 0;
2507 }
2508 
2509 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2510  * (-1) if not available */
2511 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2512 {
2513  int afc, len, flags;
2514  const uint8_t *p;
2515  unsigned int v;
2516 
2517  afc = (packet[3] >> 4) & 3;
2518  if (afc <= 1)
2519  return AVERROR_INVALIDDATA;
2520  p = packet + 4;
2521  len = p[0];
2522  p++;
2523  if (len == 0)
2524  return AVERROR_INVALIDDATA;
2525  flags = *p++;
2526  len--;
2527  if (!(flags & 0x10))
2528  return AVERROR_INVALIDDATA;
2529  if (len < 6)
2530  return AVERROR_INVALIDDATA;
2531  v = AV_RB32(p);
2532  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2533  *ppcr_low = ((p[4] & 1) << 8) | p[5];
2534  return 0;
2535 }
2536 
2537 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2538 
2539  /* NOTE: We attempt to seek on non-seekable files as well, as the
2540  * probe buffer usually is big enough. Only warn if the seek failed
2541  * on files where the seek should work. */
2542  if (avio_seek(pb, pos, SEEK_SET) < 0)
2543  av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2544 }
2545 
2547 {
2548  MpegTSContext *ts = s->priv_data;
2549  AVIOContext *pb = s->pb;
2550  uint8_t buf[8 * 1024] = {0};
2551  int len;
2552  int64_t pos, probesize = s->probesize;
2553 
2554  if (ffio_ensure_seekback(pb, probesize) < 0)
2555  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2556 
2557  /* read the first 8192 bytes to get packet size */
2558  pos = avio_tell(pb);
2559  len = avio_read(pb, buf, sizeof(buf));
2560  ts->raw_packet_size = get_packet_size(buf, len);
2561  if (ts->raw_packet_size <= 0) {
2562  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2564  }
2565  ts->stream = s;
2566  ts->auto_guess = 0;
2567 
2568  if (s->iformat == &ff_mpegts_demuxer) {
2569  /* normal demux */
2570 
2571  /* first do a scan to get all the services */
2572  seek_back(s, pb, pos);
2573 
2575 
2577 
2578  handle_packets(ts, probesize / ts->raw_packet_size);
2579  /* if could not find service, enable auto_guess */
2580 
2581  ts->auto_guess = 1;
2582 
2583  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2584 
2586  } else {
2587  AVStream *st;
2588  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2589  int64_t pcrs[2], pcr_h;
2590  int packet_count[2];
2591  uint8_t packet[TS_PACKET_SIZE];
2592  const uint8_t *data;
2593 
2594  /* only read packets */
2595 
2596  st = avformat_new_stream(s, NULL);
2597  if (!st)
2598  return AVERROR(ENOMEM);
2599  avpriv_set_pts_info(st, 60, 1, 27000000);
2602 
2603  /* we iterate until we find two PCRs to estimate the bitrate */
2604  pcr_pid = -1;
2605  nb_pcrs = 0;
2606  nb_packets = 0;
2607  for (;;) {
2608  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2609  if (ret < 0)
2610  return ret;
2611  pid = AV_RB16(data + 1) & 0x1fff;
2612  if ((pcr_pid == -1 || pcr_pid == pid) &&
2613  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2615  pcr_pid = pid;
2616  packet_count[nb_pcrs] = nb_packets;
2617  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2618  nb_pcrs++;
2619  if (nb_pcrs >= 2)
2620  break;
2621  } else {
2623  }
2624  nb_packets++;
2625  }
2626 
2627  /* NOTE1: the bitrate is computed without the FEC */
2628  /* NOTE2: it is only the bitrate of the start of the stream */
2629  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2630  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2631  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2632  st->codecpar->bit_rate = s->bit_rate;
2633  st->start_time = ts->cur_pcr;
2634  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2635  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2636  }
2637 
2638  seek_back(s, pb, pos);
2639  return 0;
2640 }
2641 
2642 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2643 
2645 {
2646  MpegTSContext *ts = s->priv_data;
2647  int ret, i;
2648  int64_t pcr_h, next_pcr_h, pos;
2649  int pcr_l, next_pcr_l;
2650  uint8_t pcr_buf[12];
2651  const uint8_t *data;
2652 
2653  if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2654  return AVERROR(ENOMEM);
2655  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2656  pkt->pos = avio_tell(s->pb);
2657  if (ret < 0) {
2658  av_packet_unref(pkt);
2659  return ret;
2660  }
2661  if (data != pkt->data)
2662  memcpy(pkt->data, data, ts->raw_packet_size);
2664  if (ts->mpeg2ts_compute_pcr) {
2665  /* compute exact PCR for each packet */
2666  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2667  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2668  pos = avio_tell(s->pb);
2669  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2670  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2671  avio_read(s->pb, pcr_buf, 12);
2672  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2673  /* XXX: not precise enough */
2674  ts->pcr_incr =
2675  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2676  (i + 1);
2677  break;
2678  }
2679  }
2680  avio_seek(s->pb, pos, SEEK_SET);
2681  /* no next PCR found: we use previous increment */
2682  ts->cur_pcr = pcr_h * 300 + pcr_l;
2683  }
2684  pkt->pts = ts->cur_pcr;
2685  pkt->duration = ts->pcr_incr;
2686  ts->cur_pcr += ts->pcr_incr;
2687  }
2688  pkt->stream_index = 0;
2689  return 0;
2690 }
2691 
2693 {
2694  MpegTSContext *ts = s->priv_data;
2695  int ret, i;
2696 
2697  pkt->size = -1;
2698  ts->pkt = pkt;
2699  ret = handle_packets(ts, 0);
2700  if (ret < 0) {
2701  av_packet_unref(ts->pkt);
2702  /* flush pes data left */
2703  for (i = 0; i < NB_PID_MAX; i++)
2704  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2705  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2706  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2707  ret = new_pes_packet(pes, pkt);
2708  if (ret < 0)
2709  return ret;
2710  pes->state = MPEGTS_SKIP;
2711  ret = 0;
2712  break;
2713  }
2714  }
2715  }
2716 
2717  if (!ret && pkt->size < 0)
2718  ret = AVERROR_INVALIDDATA;
2719  return ret;
2720 }
2721 
2722 static void mpegts_free(MpegTSContext *ts)
2723 {
2724  int i;
2725 
2726  clear_programs(ts);
2727 
2728  for (i = 0; i < NB_PID_MAX; i++)
2729  if (ts->pids[i])
2730  mpegts_close_filter(ts, ts->pids[i]);
2731 }
2732 
2734 {
2735  MpegTSContext *ts = s->priv_data;
2736  mpegts_free(ts);
2737  return 0;
2738 }
2739 
2740 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2741  int64_t *ppos, int64_t pos_limit)
2742 {
2743  MpegTSContext *ts = s->priv_data;
2744  int64_t pos, timestamp;
2746  int pcr_l, pcr_pid =
2747  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2748  int pos47 = ts->pos47_full % ts->raw_packet_size;
2749  pos =
2750  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2751  ts->raw_packet_size + pos47;
2752  while(pos < pos_limit) {
2753  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2754  return AV_NOPTS_VALUE;
2755  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2756  return AV_NOPTS_VALUE;
2757  if (buf[0] != 0x47) {
2758  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2759  return AV_NOPTS_VALUE;
2760  pos = avio_tell(s->pb);
2761  continue;
2762  }
2763  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2764  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
2765  *ppos = pos;
2766  return timestamp;
2767  }
2768  pos += ts->raw_packet_size;
2769  }
2770 
2771  return AV_NOPTS_VALUE;
2772 }
2773 
2774 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2775  int64_t *ppos, int64_t pos_limit)
2776 {
2777  MpegTSContext *ts = s->priv_data;
2778  int64_t pos;
2779  int pos47 = ts->pos47_full % ts->raw_packet_size;
2780  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2782  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2783  return AV_NOPTS_VALUE;
2784  while(pos < pos_limit) {
2785  int ret;
2786  AVPacket pkt;
2787  av_init_packet(&pkt);
2788  ret = av_read_frame(s, &pkt);
2789  if (ret < 0)
2790  return AV_NOPTS_VALUE;
2791  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2792  ff_reduce_index(s, pkt.stream_index);
2793  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2794  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2795  int64_t dts = pkt.dts;
2796  *ppos = pkt.pos;
2797  av_packet_unref(&pkt);
2798  return dts;
2799  }
2800  }
2801  pos = pkt.pos;
2802  av_packet_unref(&pkt);
2803  }
2804 
2805  return AV_NOPTS_VALUE;
2806 }
2807 
2808 /**************************************************************/
2809 /* parsing functions - called from other demuxers such as RTP */
2810 
2812 {
2813  MpegTSContext *ts;
2814 
2815  ts = av_mallocz(sizeof(MpegTSContext));
2816  if (!ts)
2817  return NULL;
2818  /* no stream case, currently used by RTP */
2820  ts->stream = s;
2821  ts->auto_guess = 1;
2824 
2825  return ts;
2826 }
2827 
2828 /* return the consumed length if a packet was output, or -1 if no
2829  * packet is output */
2831  const uint8_t *buf, int len)
2832 {
2833  int len1;
2834 
2835  len1 = len;
2836  ts->pkt = pkt;
2837  for (;;) {
2838  ts->stop_parse = 0;
2839  if (len < TS_PACKET_SIZE)
2840  return AVERROR_INVALIDDATA;
2841  if (buf[0] != 0x47) {
2842  buf++;
2843  len--;
2844  } else {
2845  handle_packet(ts, buf);
2846  buf += TS_PACKET_SIZE;
2847  len -= TS_PACKET_SIZE;
2848  if (ts->stop_parse == 1)
2849  break;
2850  }
2851  }
2852  return len1 - len;
2853 }
2854 
2856 {
2857  mpegts_free(ts);
2858  av_free(ts);
2859 }
2860 
2861 AVInputFormat ff_mpegts_demuxer = {
2862  .name = "mpegts",
2863  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2864  .priv_data_size = sizeof(MpegTSContext),
2869  .read_timestamp = mpegts_get_dts,
2871  .priv_class = &mpegts_class,
2872 };
2873 
2875  .name = "mpegtsraw",
2876  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2877  .priv_data_size = sizeof(MpegTSContext),
2881  .read_timestamp = mpegts_get_dts,
2883  .priv_class = &mpegtsraw_class,
2884 };
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:2722
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:1459
uint8_t last_sec_num
Definition: mpegts.c:588
#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:634
int64_t last_pcr
Definition: mpegts.c:93
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
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:124
#define MP4ESDescrTag
Definition: isom.h:243
int total_size
Definition: mpegts.c:235
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:434
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2414
AVOption.
Definition: opt.h:245
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:133
#define AV_OPT_FLAG_EXPORT
The option is inteded for exporting values to the caller.
Definition: opt.h:286
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:1897
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:2642
enum AVMediaType codec_type
Definition: mpegts.c:683
int64_t dts
Definition: mpegts.c:239
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1348
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
#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:2193
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1594
static void clear_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:274
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:4399
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:217
static int mpegts_probe(AVProbeData *p)
Definition: mpegts.c:2475
#define MP4ODescrTag
Definition: isom.h:241
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:1066
union MpegTSFilter::@182 u
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:2811
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:534
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3911
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1171
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1575
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:213
uint8_t version
Definition: mpegts.c:586
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1421
int size_stat_count
Definition: mpegts.c:119
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:842
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:2861
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2105
void * priv_data
Definition: avformat.h:891
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:287
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:844
#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:652
discard all
Definition: avcodec.h:778
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:2692
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:688
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1368
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:225
SLConfigDescr sl
Definition: mpegts.h:93
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2357
int packet_seq_num_len
Definition: mpegts.h:86
int es_id
Definition: mpegts.h:90
int inst_bitrate_len
Definition: mpegts.h:83
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:478
int last_cc
Definition: mpegts.c:92
Format I/O context.
Definition: avformat.h:1319
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2389
unsigned int nb_stream_indexes
Definition: avformat.h:1257
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:1776
#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:1825
#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:916
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:160
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:2546
AVFormatContext * s
Definition: mpegts.c:1283
uint8_t bits
Definition: crc.c:296
uint8_t
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: avformat.h:1108
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
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:2774
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1278
AVOptions.
int size_stat[3]
Definition: mpegts.c:118
int au_seq_num_len
Definition: mpegts.h:85
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:703
int stop_parse
stop parsing loop
Definition: mpegts.c:138
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1362
static int discard_pid(MpegTSContext *ts, unsigned int pid)
discard_pid() decides if the pid is to be discarded according to caller's programs selection ...
Definition: mpegts.c:352
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1592
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:988
int id
Format-specific stream ID.
Definition: avformat.h:883
enum AVStreamParseType need_parsing
Definition: avformat.h:1074
int use_au_start
Definition: mpegts.h:73
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:4037
int pmt_pid
Definition: avformat.h:1261
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1592
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, uint8_t clip)
Definition: cfhd.c:80
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Mp4Descr * descr
Definition: mpegts.c:1285
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:607
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1315
uint8_t * data
Definition: avcodec.h:1574
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4133
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
MpegTSState
Definition: mpegts.c:210
uint32_t tag
Definition: movenc.c:1353
#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
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:447
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:2537
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1255
static int probe(AVProbeData *p)
Definition: act.c:36
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1257
unsigned int * stream_index
Definition: avformat.h:1256
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:550
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3940
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:492
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:2874
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1293
MPEGTS stream ID, this is required to pass the stream ID information from the demuxer to the correspo...
Definition: avcodec.h:1505
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:823
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:607
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:365
enum AVCodecID codec_id
Definition: mpegts.c:684
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:467
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:3822
static const uint8_t opus_default_extradata[30]
Definition: opus.h:67
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:459
static void reanalyze(MpegTSContext *ts)
Definition: mpegts.c:2322
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:215
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:189
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1290
static const StreamType HDMV_types[]
Definition: mpegts.c:709
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:486
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:259
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:2733
unsigned int check_crc
Definition: mpegts.c:83
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2644
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:3903
const char * r
Definition: vf_curves.c:107
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1472
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:510
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3907
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1557
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:2943
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1252
#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:80
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1383
int flags
copied to the AVPacket flags
Definition: mpegts.c:234
int program_num
Definition: avformat.h:1260
#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:1580
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3929
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:541
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:462
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1375
static const uint16_t fc[]
Definition: dcaenc.h:41
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4483
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:207
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:3099
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:731
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:725
uint16_t id
Definition: mpegts.c:585
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:1505
#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:242
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:357
static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:324
int ocr_len
Definition: mpegts.h:81
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:778
AVDictionary * metadata
Definition: avformat.h:945
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1588
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1436
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1397
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:1584
#define CHECK_BLOCK
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:909
uint8_t sec_num
Definition: mpegts.c:587
int extended_stream_id
Definition: mpegts.c:237
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:194
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:687
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
int ts_id
Transport stream id.
Definition: avformat.h:1633
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:843
FILE * out
Definition: movenc-test.c:54
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:640
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2740
#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:92
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1228
unsigned int id
Definition: mpegts.c:103
#define MP4DecConfigDescrTag
Definition: isom.h:244
uint8_t stream_id
Definition: mpegts.c:238
static MpegTSFilter * mpegts_open_filter(MpegTSContext *ts, unsigned int pid, enum MpegTSFilterType type)
Definition: mpegts.c:444
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:66
#define hex_dump_debug(class, buf, size)
Definition: internal.h:41
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
static const StreamType METADATA_types[]
Definition: mpegts.c:745
int use_au_end
Definition: mpegts.h:74
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1325
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:549
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:869
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:560
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
void * buf
Definition: avisynth_c.h:553
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:221
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:602
GLint GLenum type
Definition: opengl_enc.c:105
#define MAX_LEVEL
Definition: mpegts.c:1281
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:69
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:101
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:2511
int use_timestamps
Definition: mpegts.h:77
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:305
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1859
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:276
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:162
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:2830
AVMediaType
Definition: avutil.h:191
refcounted data buffer API
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:513
static const StreamType DESC_types[]
Definition: mpegts.c:752
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
int use_idle
Definition: mpegts.h:78
SLConfigDescr sl
Definition: mpegts.c:243
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1628
int dec_config_descr_len
Definition: mpegts.h:91
uint8_t * section_buf
Definition: mpegts.c:82
uint8_t tid
Definition: mpegts.c:584
AVDictionary * metadata
Definition: avformat.h:1258
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
static int flags
Definition: cpu.c:47
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:1603
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:876
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:343
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
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:806
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:2030
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:425
static const AVClass mpegts_class
Definition: mpegts.c:182
int use_rand_acc_pt
Definition: mpegts.h:75
int data_index
Definition: mpegts.c:233
if(ret< 0)
Definition: vf_mcdeint.c:282
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1183
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:923
static double c[64]
unsigned crc
Definition: mpegts.c:80
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:241
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:860
#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:1607
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1331
PESCallback * pes_cb
Definition: mpegts.c:68
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:591
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:725
static MpegTSFilter * mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
Definition: mpegts.c:467
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:638
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:615
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1286
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:1347
int pcr_pid
Definition: avformat.h:1262
int64_t last_pos
to detect seek
Definition: mpegts.c:142
int timestamp_res
Definition: mpegts.h:79
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:291
#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:3925
int use_padding
Definition: mpegts.h:76
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:151
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:1573
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1006
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:311
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3915
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:508
int degr_prior_len
Definition: mpegts.h:84
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1336
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:299
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1521
AVIOContext pb
Definition: mpegts.c:1284
int stream_index
Definition: avcodec.h:1576
MpegTSFilterType
Definition: mpegts.c:56
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:47
#define MKTAG(a, b, c, d)
Definition: common.h:342
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:761
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:2855
int au_len
Definition: mpegts.h:82
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1120
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1551
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
uint32_t stream_type
Definition: mpegts.c:682
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:630
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1567
#define FFMAX3(a, b, c)
Definition: common.h:95
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#define av_unused
Definition: attributes.h:126
AVProgram ** programs
Definition: avformat.h:1473
#define MP4SLDescrTag
Definition: isom.h:246
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:2422
#define SDT_TID
Definition: mpegts.h:43
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:72
const char * name
Definition: opengl_enc.c:103
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:1489