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mpegts.c
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1 /*
2  * MPEG-2 transport stream (aka DVB) demuxer
3  * Copyright (c) 2002-2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/get_bits.h"
33 #include "libavcodec/opus.h"
34 #include "avformat.h"
35 #include "mpegts.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "mpeg.h"
39 #include "isom.h"
40 
41 /* maximum size in which we look for synchronization if
42  * synchronization is lost */
43 #define MAX_RESYNC_SIZE 65536
44 
45 #define MAX_PES_PAYLOAD 200 * 1024
46 
47 #define MAX_MP4_DESCR_COUNT 16
48 
49 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
50  do { \
51  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52  (modulus) = (dividend) % (divisor); \
53  (prev_dividend) = (dividend); \
54  } while (0)
55 
60 };
61 
62 typedef struct MpegTSFilter MpegTSFilter;
63 
64 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65  int is_start, int64_t pos);
66 
67 typedef struct MpegTSPESFilter {
69  void *opaque;
71 
72 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
73 
74 typedef void SetServiceCallback (void *opaque, int ret);
75 
76 typedef struct MpegTSSectionFilter {
79  int last_ver;
80  unsigned crc;
81  unsigned last_crc;
83  unsigned int check_crc : 1;
84  unsigned int end_of_section_reached : 1;
86  void *opaque;
88 
89 struct MpegTSFilter {
90  int pid;
91  int es_id;
92  int last_cc; /* last cc code (-1 if first packet) */
93  int64_t last_pcr;
95  union {
98  } u;
99 };
100 
101 #define MAX_PIDS_PER_PROGRAM 64
102 struct Program {
103  unsigned int id; // program id/service id
104  unsigned int nb_pids;
105  unsigned int pids[MAX_PIDS_PER_PROGRAM];
106 
107  /** have we found pmt for this program */
109 };
110 
112  const AVClass *class;
113  /* user data */
115  /** raw packet size, including FEC if present */
117 
118  int size_stat[3];
120 #define SIZE_STAT_THRESHOLD 10
121 
122  int64_t pos47_full;
123 
124  /** if true, all pids are analyzed to find streams */
126 
127  /** compute exact PCR for each transport stream packet */
129 
130  /** fix dvb teletext pts */
132 
133  int64_t cur_pcr; /**< used to estimate the exact PCR */
134  int pcr_incr; /**< used to estimate the exact PCR */
135 
136  /* data needed to handle file based ts */
137  /** stop parsing loop */
139  /** packet containing Audio/Video data */
141  /** to detect seek */
142  int64_t last_pos;
143 
146 
148 
150 
151  /******************************************/
152  /* private mpegts data */
153  /* scan context */
154  /** structure to keep track of Program->pids mapping */
155  unsigned int nb_prg;
156  struct Program *prg;
157 
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 type=%d\n", pid, type);
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  int pid = AV_RB16(buf+1) & 0x1FFF;
547  int asc = buf[i + 3] & 0x30;
548  if (!probe || pid == 0x1FFF || asc) {
549  int x = i % packet_size;
550  stat[x]++;
551  stat_all++;
552  if (stat[x] > best_score) {
553  best_score = stat[x];
554  }
555  }
556  }
557  }
558 
559  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
560 }
561 
562 /* autodetect fec presence. Must have at least 1024 bytes */
563 static int get_packet_size(const uint8_t *buf, int size)
564 {
565  int score, fec_score, dvhs_score;
566 
567  if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
568  return AVERROR_INVALIDDATA;
569 
570  score = analyze(buf, size, TS_PACKET_SIZE, 0);
571  dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
572  fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
573  av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
574  score, dvhs_score, fec_score);
575 
576  if (score > fec_score && score > dvhs_score)
577  return TS_PACKET_SIZE;
578  else if (dvhs_score > score && dvhs_score > fec_score)
579  return TS_DVHS_PACKET_SIZE;
580  else if (score < fec_score && dvhs_score < fec_score)
581  return TS_FEC_PACKET_SIZE;
582  else
583  return AVERROR_INVALIDDATA;
584 }
585 
586 typedef struct SectionHeader {
588  uint16_t id;
592 } SectionHeader;
593 
595 {
596  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
597  return 1;
598 
599  tssf->last_ver = h->version;
600  tssf->last_crc = tssf->crc;
601 
602  return 0;
603 }
604 
605 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
606 {
607  const uint8_t *p;
608  int c;
609 
610  p = *pp;
611  if (p >= p_end)
612  return AVERROR_INVALIDDATA;
613  c = *p++;
614  *pp = p;
615  return c;
616 }
617 
618 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
619 {
620  const uint8_t *p;
621  int c;
622 
623  p = *pp;
624  if (1 >= p_end - p)
625  return AVERROR_INVALIDDATA;
626  c = AV_RB16(p);
627  p += 2;
628  *pp = p;
629  return c;
630 }
631 
632 /* read and allocate a DVB string preceded by its length */
633 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
634 {
635  int len;
636  const uint8_t *p;
637  char *str;
638 
639  p = *pp;
640  len = get8(&p, p_end);
641  if (len < 0)
642  return NULL;
643  if (len > p_end - p)
644  return NULL;
645  str = av_malloc(len + 1);
646  if (!str)
647  return NULL;
648  memcpy(str, p, len);
649  str[len] = '\0';
650  p += len;
651  *pp = p;
652  return str;
653 }
654 
656  const uint8_t **pp, const uint8_t *p_end)
657 {
658  int val;
659 
660  val = get8(pp, p_end);
661  if (val < 0)
662  return val;
663  h->tid = val;
664  *pp += 2;
665  val = get16(pp, p_end);
666  if (val < 0)
667  return val;
668  h->id = val;
669  val = get8(pp, p_end);
670  if (val < 0)
671  return val;
672  h->version = (val >> 1) & 0x1f;
673  val = get8(pp, p_end);
674  if (val < 0)
675  return val;
676  h->sec_num = val;
677  val = get8(pp, p_end);
678  if (val < 0)
679  return val;
680  h->last_sec_num = val;
681  return 0;
682 }
683 
684 typedef struct StreamType {
685  uint32_t stream_type;
688 } StreamType;
689 
690 static const StreamType ISO_types[] = {
697  /* Makito encoder sets stream type 0x11 for AAC,
698  * so auto-detect LOAS/LATM instead of hardcoding it. */
699 #if !CONFIG_LOAS_DEMUXER
700  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
701 #endif
710  { 0 },
711 };
712 
713 static const StreamType HDMV_types[] = {
719  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
720  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
721  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
722  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
725  { 0 },
726 };
727 
728 /* SCTE types */
729 static const StreamType SCTE_types[] = {
731  { 0 },
732 };
733 
734 /* ATSC ? */
735 static const StreamType MISC_types[] = {
738  { 0 },
739 };
740 
741 static const StreamType REGD_types[] = {
742  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
743  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
744  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
745  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
746  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
747  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
748  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
749  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
750  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
751  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
752  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
753  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
754  { 0 },
755 };
756 
757 static const StreamType METADATA_types[] = {
758  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
759  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
760  { 0 },
761 };
762 
763 /* descriptor present */
764 static const StreamType DESC_types[] = {
765  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
766  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
769  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
770  { 0 },
771 };
772 
774  uint32_t stream_type,
775  const StreamType *types)
776 {
777  for (; types->stream_type; types++)
778  if (stream_type == types->stream_type) {
779  if (st->codecpar->codec_type != types->codec_type ||
780  st->codecpar->codec_id != types->codec_id) {
781  st->codecpar->codec_type = types->codec_type;
782  st->codecpar->codec_id = types->codec_id;
783  st->internal->need_context_update = 1;
784  }
785  st->request_probe = 0;
786  return;
787  }
788 }
789 
791  uint32_t stream_type, uint32_t prog_reg_desc)
792 {
793  int old_codec_type = st->codecpar->codec_type;
794  int old_codec_id = st->codecpar->codec_id;
795  int old_codec_tag = st->codecpar->codec_tag;
796 
797  if (avcodec_is_open(st->internal->avctx)) {
798  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
799  return 0;
800  }
801 
802  avpriv_set_pts_info(st, 33, 1, 90000);
803  st->priv_data = pes;
807  pes->st = st;
808  pes->stream_type = stream_type;
809 
810  av_log(pes->stream, AV_LOG_DEBUG,
811  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
812  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
813 
814  st->codecpar->codec_tag = pes->stream_type;
815 
816  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
817  if (pes->stream_type == 4)
818  st->request_probe = 50;
819  if ((prog_reg_desc == AV_RL32("HDMV") ||
820  prog_reg_desc == AV_RL32("HDPR")) &&
822  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
823  if (pes->stream_type == 0x83) {
824  // HDMV TrueHD streams also contain an AC3 coded version of the
825  // audio track - add a second stream for this
826  AVStream *sub_st;
827  // priv_data cannot be shared between streams
828  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
829  if (!sub_pes)
830  return AVERROR(ENOMEM);
831  memcpy(sub_pes, pes, sizeof(*sub_pes));
832 
833  sub_st = avformat_new_stream(pes->stream, NULL);
834  if (!sub_st) {
835  av_free(sub_pes);
836  return AVERROR(ENOMEM);
837  }
838 
839  sub_st->id = pes->pid;
840  avpriv_set_pts_info(sub_st, 33, 1, 90000);
841  sub_st->priv_data = sub_pes;
843  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
845  sub_pes->sub_st = pes->sub_st = sub_st;
846  }
847  }
848  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
849  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
850  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
851  st->codecpar->codec_id = old_codec_id;
852  st->codecpar->codec_type = old_codec_type;
853  }
854  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
855  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
856  st->probe_packets > 0 &&
857  stream_type == STREAM_TYPE_PRIVATE_DATA) {
861  }
862 
863  /* queue a context update if properties changed */
864  if (old_codec_type != st->codecpar->codec_type ||
865  old_codec_id != st->codecpar->codec_id ||
866  old_codec_tag != st->codecpar->codec_tag)
867  st->internal->need_context_update = 1;
868 
869  return 0;
870 }
871 
873 {
874  pes->pts = AV_NOPTS_VALUE;
875  pes->dts = AV_NOPTS_VALUE;
876  pes->data_index = 0;
877  pes->flags = 0;
878  av_buffer_unref(&pes->buffer);
879 }
880 
881 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
882 {
883  av_init_packet(pkt);
884  pkt->data = buffer;
885  pkt->size = len;
886 }
887 
889 {
890  char *sd;
891 
892  av_init_packet(pkt);
893 
894  pkt->buf = pes->buffer;
895  pkt->data = pes->buffer->data;
896  pkt->size = pes->data_index;
897 
898  if (pes->total_size != MAX_PES_PAYLOAD &&
899  pes->pes_header_size + pes->data_index != pes->total_size +
900  PES_START_SIZE) {
901  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
902  pes->flags |= AV_PKT_FLAG_CORRUPT;
903  }
904  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
905 
906  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
907  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
908  pkt->stream_index = pes->sub_st->index;
909  else
910  pkt->stream_index = pes->st->index;
911  pkt->pts = pes->pts;
912  pkt->dts = pes->dts;
913  /* store position of first TS packet of this PES packet */
914  pkt->pos = pes->ts_packet_pos;
915  pkt->flags = pes->flags;
916 
917  pes->buffer = NULL;
919 
921  if (!sd)
922  return AVERROR(ENOMEM);
923  *sd = pes->stream_id;
924 
925  return 0;
926 }
927 
928 static uint64_t get_ts64(GetBitContext *gb, int bits)
929 {
930  if (get_bits_left(gb) < bits)
931  return AV_NOPTS_VALUE;
932  return get_bits64(gb, bits);
933 }
934 
936  const uint8_t *buf, int buf_size)
937 {
938  GetBitContext gb;
939  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
940  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
941  int dts_flag = -1, cts_flag = -1;
942  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
943  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
944  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
945 
946  memcpy(buf_padded, buf, buf_padded_size);
947 
948  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
949 
950  if (sl->use_au_start)
951  au_start_flag = get_bits1(&gb);
952  if (sl->use_au_end)
953  au_end_flag = get_bits1(&gb);
954  if (!sl->use_au_start && !sl->use_au_end)
955  au_start_flag = au_end_flag = 1;
956  if (sl->ocr_len > 0)
957  ocr_flag = get_bits1(&gb);
958  if (sl->use_idle)
959  idle_flag = get_bits1(&gb);
960  if (sl->use_padding)
961  padding_flag = get_bits1(&gb);
962  if (padding_flag)
963  padding_bits = get_bits(&gb, 3);
964 
965  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
966  if (sl->packet_seq_num_len)
968  if (sl->degr_prior_len)
969  if (get_bits1(&gb))
970  skip_bits(&gb, sl->degr_prior_len);
971  if (ocr_flag)
972  skip_bits_long(&gb, sl->ocr_len);
973  if (au_start_flag) {
974  if (sl->use_rand_acc_pt)
975  get_bits1(&gb);
976  if (sl->au_seq_num_len > 0)
977  skip_bits_long(&gb, sl->au_seq_num_len);
978  if (sl->use_timestamps) {
979  dts_flag = get_bits1(&gb);
980  cts_flag = get_bits1(&gb);
981  }
982  }
983  if (sl->inst_bitrate_len)
984  inst_bitrate_flag = get_bits1(&gb);
985  if (dts_flag == 1)
986  dts = get_ts64(&gb, sl->timestamp_len);
987  if (cts_flag == 1)
988  cts = get_ts64(&gb, sl->timestamp_len);
989  if (sl->au_len > 0)
990  skip_bits_long(&gb, sl->au_len);
991  if (inst_bitrate_flag)
993  }
994 
995  if (dts != AV_NOPTS_VALUE)
996  pes->dts = dts;
997  if (cts != AV_NOPTS_VALUE)
998  pes->pts = cts;
999 
1000  if (sl->timestamp_len && sl->timestamp_res)
1002 
1003  return (get_bits_count(&gb) + 7) >> 3;
1004 }
1005 
1006 /* return non zero if a packet could be constructed */
1008  const uint8_t *buf, int buf_size, int is_start,
1009  int64_t pos)
1010 {
1011  PESContext *pes = filter->u.pes_filter.opaque;
1012  MpegTSContext *ts = pes->ts;
1013  const uint8_t *p;
1014  int ret, len, code;
1015 
1016  if (!ts->pkt)
1017  return 0;
1018 
1019  if (is_start) {
1020  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1021  ret = new_pes_packet(pes, ts->pkt);
1022  if (ret < 0)
1023  return ret;
1024  ts->stop_parse = 1;
1025  } else {
1027  }
1028  pes->state = MPEGTS_HEADER;
1029  pes->ts_packet_pos = pos;
1030  }
1031  p = buf;
1032  while (buf_size > 0) {
1033  switch (pes->state) {
1034  case MPEGTS_HEADER:
1035  len = PES_START_SIZE - pes->data_index;
1036  if (len > buf_size)
1037  len = buf_size;
1038  memcpy(pes->header + pes->data_index, p, len);
1039  pes->data_index += len;
1040  p += len;
1041  buf_size -= len;
1042  if (pes->data_index == PES_START_SIZE) {
1043  /* we got all the PES or section header. We can now
1044  * decide */
1045  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1046  pes->header[2] == 0x01) {
1047  /* it must be an MPEG-2 PES stream */
1048  code = pes->header[3] | 0x100;
1049  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1050  code);
1051  pes->stream_id = pes->header[3];
1052 
1053  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1054  (!pes->sub_st ||
1055  pes->sub_st->discard == AVDISCARD_ALL)) ||
1056  code == 0x1be) /* padding_stream */
1057  goto skip;
1058 
1059  /* stream not present in PMT */
1060  if (!pes->st) {
1061  if (ts->skip_changes)
1062  goto skip;
1063 
1064  pes->st = avformat_new_stream(ts->stream, NULL);
1065  if (!pes->st)
1066  return AVERROR(ENOMEM);
1067  pes->st->id = pes->pid;
1068  mpegts_set_stream_info(pes->st, pes, 0, 0);
1069  }
1070 
1071  pes->total_size = AV_RB16(pes->header + 4);
1072  /* NOTE: a zero total size means the PES size is
1073  * unbounded */
1074  if (!pes->total_size)
1075  pes->total_size = MAX_PES_PAYLOAD;
1076 
1077  /* allocate pes buffer */
1078  pes->buffer = av_buffer_alloc(pes->total_size +
1080  if (!pes->buffer)
1081  return AVERROR(ENOMEM);
1082 
1083  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1084  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1085  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1086  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1087  pes->state = MPEGTS_PESHEADER;
1088  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1089  av_log(pes->stream, AV_LOG_TRACE,
1090  "pid=%x stream_type=%x probing\n",
1091  pes->pid,
1092  pes->stream_type);
1093  pes->st->request_probe = 1;
1094  }
1095  } else {
1096  pes->pes_header_size = 6;
1097  pes->state = MPEGTS_PAYLOAD;
1098  pes->data_index = 0;
1099  }
1100  } else {
1101  /* otherwise, it should be a table */
1102  /* skip packet */
1103 skip:
1104  pes->state = MPEGTS_SKIP;
1105  continue;
1106  }
1107  }
1108  break;
1109  /**********************************************/
1110  /* PES packing parsing */
1111  case MPEGTS_PESHEADER:
1112  len = PES_HEADER_SIZE - pes->data_index;
1113  if (len < 0)
1114  return AVERROR_INVALIDDATA;
1115  if (len > buf_size)
1116  len = buf_size;
1117  memcpy(pes->header + pes->data_index, p, len);
1118  pes->data_index += len;
1119  p += len;
1120  buf_size -= len;
1121  if (pes->data_index == PES_HEADER_SIZE) {
1122  pes->pes_header_size = pes->header[8] + 9;
1124  }
1125  break;
1126  case MPEGTS_PESHEADER_FILL:
1127  len = pes->pes_header_size - pes->data_index;
1128  if (len < 0)
1129  return AVERROR_INVALIDDATA;
1130  if (len > buf_size)
1131  len = buf_size;
1132  memcpy(pes->header + pes->data_index, p, len);
1133  pes->data_index += len;
1134  p += len;
1135  buf_size -= len;
1136  if (pes->data_index == pes->pes_header_size) {
1137  const uint8_t *r;
1138  unsigned int flags, pes_ext, skip;
1139 
1140  flags = pes->header[7];
1141  r = pes->header + 9;
1142  pes->pts = AV_NOPTS_VALUE;
1143  pes->dts = AV_NOPTS_VALUE;
1144  if ((flags & 0xc0) == 0x80) {
1145  pes->dts = pes->pts = ff_parse_pes_pts(r);
1146  r += 5;
1147  } else if ((flags & 0xc0) == 0xc0) {
1148  pes->pts = ff_parse_pes_pts(r);
1149  r += 5;
1150  pes->dts = ff_parse_pes_pts(r);
1151  r += 5;
1152  }
1153  pes->extended_stream_id = -1;
1154  if (flags & 0x01) { /* PES extension */
1155  pes_ext = *r++;
1156  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1157  skip = (pes_ext >> 4) & 0xb;
1158  skip += skip & 0x9;
1159  r += skip;
1160  if ((pes_ext & 0x41) == 0x01 &&
1161  (r + 2) <= (pes->header + pes->pes_header_size)) {
1162  /* PES extension 2 */
1163  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1164  pes->extended_stream_id = r[1];
1165  }
1166  }
1167 
1168  /* we got the full header. We parse it and get the payload */
1169  pes->state = MPEGTS_PAYLOAD;
1170  pes->data_index = 0;
1171  if (pes->stream_type == 0x12 && buf_size > 0) {
1172  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1173  buf_size);
1174  pes->pes_header_size += sl_header_bytes;
1175  p += sl_header_bytes;
1176  buf_size -= sl_header_bytes;
1177  }
1178  if (pes->stream_type == 0x15 && buf_size >= 5) {
1179  /* skip metadata access unit header */
1180  pes->pes_header_size += 5;
1181  p += 5;
1182  buf_size -= 5;
1183  }
1184  if ( pes->ts->fix_teletext_pts
1187  ) {
1188  AVProgram *p = NULL;
1189  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1190  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1191  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1192  if (f) {
1193  AVStream *st = NULL;
1194  if (f->type == MPEGTS_PES) {
1195  PESContext *pcrpes = f->u.pes_filter.opaque;
1196  if (pcrpes)
1197  st = pcrpes->st;
1198  } else if (f->type == MPEGTS_PCR) {
1199  int i;
1200  for (i = 0; i < p->nb_stream_indexes; i++) {
1201  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1202  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1203  st = pst;
1204  }
1205  }
1206  if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1207  // teletext packets do not always have correct timestamps,
1208  // the standard says they should be handled after 40.6 ms at most,
1209  // and the pcr error to this packet should be no more than 100 ms.
1210  // TODO: we should interpolate the PCR, not just use the last one
1211  int64_t pcr = f->last_pcr / 300;
1214  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1215  pes->pts = pes->dts = pcr;
1216  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1217  pes->dts > pcr + 3654 + 9000) {
1218  pes->pts = pes->dts = pcr + 3654 + 9000;
1219  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1220  pes->dts > pcr + 10*90000) { //10sec
1221  pes->pts = pes->dts = pcr + 3654 + 9000;
1222  }
1223  break;
1224  }
1225  }
1226  }
1227  }
1228  }
1229  }
1230  break;
1231  case MPEGTS_PAYLOAD:
1232  if (pes->buffer) {
1233  if (pes->data_index > 0 &&
1234  pes->data_index + buf_size > pes->total_size) {
1235  ret = new_pes_packet(pes, ts->pkt);
1236  if (ret < 0)
1237  return ret;
1238  pes->total_size = MAX_PES_PAYLOAD;
1239  pes->buffer = av_buffer_alloc(pes->total_size +
1241  if (!pes->buffer)
1242  return AVERROR(ENOMEM);
1243  ts->stop_parse = 1;
1244  } else if (pes->data_index == 0 &&
1245  buf_size > pes->total_size) {
1246  // pes packet size is < ts size packet and pes data is padded with 0xff
1247  // not sure if this is legal in ts but see issue #2392
1248  buf_size = pes->total_size;
1249  }
1250  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1251  pes->data_index += buf_size;
1252  /* emit complete packets with known packet size
1253  * decreases demuxer delay for infrequent packets like subtitles from
1254  * a couple of seconds to milliseconds for properly muxed files.
1255  * total_size is the number of bytes following pes_packet_length
1256  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1257  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1258  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1259  ts->stop_parse = 1;
1260  ret = new_pes_packet(pes, ts->pkt);
1261  if (ret < 0)
1262  return ret;
1263  }
1264  }
1265  buf_size = 0;
1266  break;
1267  case MPEGTS_SKIP:
1268  buf_size = 0;
1269  break;
1270  }
1271  }
1272 
1273  return 0;
1274 }
1275 
1276 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1277 {
1278  MpegTSFilter *tss;
1279  PESContext *pes;
1280 
1281  /* if no pid found, then add a pid context */
1282  pes = av_mallocz(sizeof(PESContext));
1283  if (!pes)
1284  return 0;
1285  pes->ts = ts;
1286  pes->stream = ts->stream;
1287  pes->pid = pid;
1288  pes->pcr_pid = pcr_pid;
1289  pes->state = MPEGTS_SKIP;
1290  pes->pts = AV_NOPTS_VALUE;
1291  pes->dts = AV_NOPTS_VALUE;
1292  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1293  if (!tss) {
1294  av_free(pes);
1295  return 0;
1296  }
1297  return pes;
1298 }
1299 
1300 #define MAX_LEVEL 4
1301 typedef struct MP4DescrParseContext {
1308  int level;
1311 
1313  const uint8_t *buf, unsigned size,
1314  Mp4Descr *descr, int max_descr_count)
1315 {
1316  int ret;
1317  if (size > (1 << 30))
1318  return AVERROR_INVALIDDATA;
1319 
1320  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1321  NULL, NULL, NULL, NULL)) < 0)
1322  return ret;
1323 
1324  d->s = s;
1325  d->level = 0;
1326  d->descr_count = 0;
1327  d->descr = descr;
1328  d->active_descr = NULL;
1329  d->max_descr_count = max_descr_count;
1330 
1331  return 0;
1332 }
1333 
1334 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1335 {
1336  int64_t new_off = avio_tell(pb);
1337  (*len) -= new_off - *off;
1338  *off = new_off;
1339 }
1340 
1341 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1342  int target_tag);
1343 
1344 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1345 {
1346  while (len > 0) {
1347  int ret = parse_mp4_descr(d, off, len, 0);
1348  if (ret < 0)
1349  return ret;
1350  update_offsets(&d->pb, &off, &len);
1351  }
1352  return 0;
1353 }
1354 
1355 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1356 {
1357  avio_rb16(&d->pb); // ID
1358  avio_r8(&d->pb);
1359  avio_r8(&d->pb);
1360  avio_r8(&d->pb);
1361  avio_r8(&d->pb);
1362  avio_r8(&d->pb);
1363  update_offsets(&d->pb, &off, &len);
1364  return parse_mp4_descr_arr(d, off, len);
1365 }
1366 
1367 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1368 {
1369  int id_flags;
1370  if (len < 2)
1371  return 0;
1372  id_flags = avio_rb16(&d->pb);
1373  if (!(id_flags & 0x0020)) { // URL_Flag
1374  update_offsets(&d->pb, &off, &len);
1375  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1376  } else {
1377  return 0;
1378  }
1379 }
1380 
1381 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1382 {
1383  int es_id = 0;
1384  int ret = 0;
1385 
1386  if (d->descr_count >= d->max_descr_count)
1387  return AVERROR_INVALIDDATA;
1388  ff_mp4_parse_es_descr(&d->pb, &es_id);
1389  d->active_descr = d->descr + (d->descr_count++);
1390 
1391  d->active_descr->es_id = es_id;
1392  update_offsets(&d->pb, &off, &len);
1393  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1394  return ret;
1395  update_offsets(&d->pb, &off, &len);
1396  if (len > 0)
1397  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1398  d->active_descr = NULL;
1399  return ret;
1400 }
1401 
1403  int len)
1404 {
1405  Mp4Descr *descr = d->active_descr;
1406  if (!descr)
1407  return AVERROR_INVALIDDATA;
1409  if (!descr->dec_config_descr)
1410  return AVERROR(ENOMEM);
1411  descr->dec_config_descr_len = len;
1412  avio_read(&d->pb, descr->dec_config_descr, len);
1413  return 0;
1414 }
1415 
1416 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1417 {
1418  Mp4Descr *descr = d->active_descr;
1419  int predefined;
1420  if (!descr)
1421  return AVERROR_INVALIDDATA;
1422 
1423 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1424  descr->sl.dst = avio_r8(&d->pb); \
1425  if (descr->sl.dst > maxv) { \
1426  descr->sl.dst = maxv; \
1427  return AVERROR_INVALIDDATA; \
1428  } \
1429 } while (0)
1430 
1431  predefined = avio_r8(&d->pb);
1432  if (!predefined) {
1433  int lengths;
1434  int flags = avio_r8(&d->pb);
1435  descr->sl.use_au_start = !!(flags & 0x80);
1436  descr->sl.use_au_end = !!(flags & 0x40);
1437  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1438  descr->sl.use_padding = !!(flags & 0x08);
1439  descr->sl.use_timestamps = !!(flags & 0x04);
1440  descr->sl.use_idle = !!(flags & 0x02);
1441  descr->sl.timestamp_res = avio_rb32(&d->pb);
1442  avio_rb32(&d->pb);
1443  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1444  R8_CHECK_CLIP_MAX(ocr_len, 63);
1445  R8_CHECK_CLIP_MAX(au_len, 31);
1446  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1447  lengths = avio_rb16(&d->pb);
1448  descr->sl.degr_prior_len = lengths >> 12;
1449  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1450  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1451  } else if (!d->predefined_SLConfigDescriptor_seen){
1452  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1454  }
1455  return 0;
1456 }
1457 
1458 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1459  int target_tag)
1460 {
1461  int tag;
1462  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1463  int ret = 0;
1464 
1465  update_offsets(&d->pb, &off, &len);
1466  if (len < 0 || len1 > len || len1 <= 0) {
1467  av_log(d->s, AV_LOG_ERROR,
1468  "Tag %x length violation new length %d bytes remaining %d\n",
1469  tag, len1, len);
1470  return AVERROR_INVALIDDATA;
1471  }
1472 
1473  if (d->level++ >= MAX_LEVEL) {
1474  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1475  ret = AVERROR_INVALIDDATA;
1476  goto done;
1477  }
1478 
1479  if (target_tag && tag != target_tag) {
1480  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1481  target_tag);
1482  ret = AVERROR_INVALIDDATA;
1483  goto done;
1484  }
1485 
1486  switch (tag) {
1487  case MP4IODescrTag:
1488  ret = parse_MP4IODescrTag(d, off, len1);
1489  break;
1490  case MP4ODescrTag:
1491  ret = parse_MP4ODescrTag(d, off, len1);
1492  break;
1493  case MP4ESDescrTag:
1494  ret = parse_MP4ESDescrTag(d, off, len1);
1495  break;
1496  case MP4DecConfigDescrTag:
1497  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1498  break;
1499  case MP4SLDescrTag:
1500  ret = parse_MP4SLDescrTag(d, off, len1);
1501  break;
1502  }
1503 
1504 
1505 done:
1506  d->level--;
1507  avio_seek(&d->pb, off + len1, SEEK_SET);
1508  return ret;
1509 }
1510 
1511 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1512  Mp4Descr *descr, int *descr_count, int max_descr_count)
1513 {
1515  int ret;
1516 
1517  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1518  if (ret < 0)
1519  return ret;
1520 
1521  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1522 
1523  *descr_count = d.descr_count;
1524  return ret;
1525 }
1526 
1527 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1528  Mp4Descr *descr, int *descr_count, int max_descr_count)
1529 {
1531  int ret;
1532 
1533  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1534  if (ret < 0)
1535  return ret;
1536 
1537  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1538 
1539  *descr_count = d.descr_count;
1540  return ret;
1541 }
1542 
1544  int section_len)
1545 {
1546  MpegTSContext *ts = filter->u.section_filter.opaque;
1547  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1548  SectionHeader h;
1549  const uint8_t *p, *p_end;
1550  AVIOContext pb;
1551  int mp4_descr_count = 0;
1552  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1553  int i, pid;
1554  AVFormatContext *s = ts->stream;
1555 
1556  p_end = section + section_len - 4;
1557  p = section;
1558  if (parse_section_header(&h, &p, p_end) < 0)
1559  return;
1560  if (h.tid != M4OD_TID)
1561  return;
1562  if (skip_identical(&h, tssf))
1563  return;
1564 
1565  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1567 
1568  for (pid = 0; pid < NB_PID_MAX; pid++) {
1569  if (!ts->pids[pid])
1570  continue;
1571  for (i = 0; i < mp4_descr_count; i++) {
1572  PESContext *pes;
1573  AVStream *st;
1574  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1575  continue;
1576  if (ts->pids[pid]->type != MPEGTS_PES) {
1577  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1578  continue;
1579  }
1580  pes = ts->pids[pid]->u.pes_filter.opaque;
1581  st = pes->st;
1582  if (!st)
1583  continue;
1584 
1585  pes->sl = mp4_descr[i].sl;
1586 
1587  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1588  mp4_descr[i].dec_config_descr_len, 0,
1589  NULL, NULL, NULL, NULL);
1590  ff_mp4_read_dec_config_descr(s, st, &pb);
1591  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1592  st->codecpar->extradata_size > 0)
1593  st->need_parsing = 0;
1594  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1595  st->codecpar->extradata_size > 0)
1596  st->need_parsing = 0;
1597 
1599  st->internal->need_context_update = 1;
1600  }
1601  }
1602  for (i = 0; i < mp4_descr_count; i++)
1603  av_free(mp4_descr[i].dec_config_descr);
1604 }
1605 
1607  int section_len)
1608 {
1609  AVProgram *prg = NULL;
1610  MpegTSContext *ts = filter->u.section_filter.opaque;
1611 
1612  int idx = ff_find_stream_index(ts->stream, filter->pid);
1613  if (idx < 0)
1614  return;
1615 
1616  new_data_packet(section, section_len, ts->pkt);
1617  ts->pkt->stream_index = idx;
1618  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1619  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1620  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1621  if (f && f->last_pcr != -1)
1622  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1623  }
1624  ts->stop_parse = 1;
1625 
1626 }
1627 
1629  1, 0, 1, 1, 2, 2, 2, 3, 3
1630 };
1631 
1632 static const uint8_t opus_stream_cnt[9] = {
1633  1, 1, 1, 2, 2, 3, 4, 4, 5,
1634 };
1635 
1636 static const uint8_t opus_channel_map[8][8] = {
1637  { 0 },
1638  { 0,1 },
1639  { 0,2,1 },
1640  { 0,1,2,3 },
1641  { 0,4,1,2,3 },
1642  { 0,4,1,2,3,5 },
1643  { 0,4,1,2,3,5,6 },
1644  { 0,6,1,2,3,4,5,7 },
1645 };
1646 
1648  const uint8_t **pp, const uint8_t *desc_list_end,
1649  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1650  MpegTSContext *ts)
1651 {
1652  const uint8_t *desc_end;
1653  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1654  char language[252];
1655  int i;
1656 
1657  desc_tag = get8(pp, desc_list_end);
1658  if (desc_tag < 0)
1659  return AVERROR_INVALIDDATA;
1660  desc_len = get8(pp, desc_list_end);
1661  if (desc_len < 0)
1662  return AVERROR_INVALIDDATA;
1663  desc_end = *pp + desc_len;
1664  if (desc_end > desc_list_end)
1665  return AVERROR_INVALIDDATA;
1666 
1667  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1668 
1669  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1670  stream_type == STREAM_TYPE_PRIVATE_DATA)
1671  mpegts_find_stream_type(st, desc_tag, DESC_types);
1672 
1673  switch (desc_tag) {
1674  case 0x1E: /* SL descriptor */
1675  desc_es_id = get16(pp, desc_end);
1676  if (desc_es_id < 0)
1677  break;
1678  if (ts && ts->pids[pid])
1679  ts->pids[pid]->es_id = desc_es_id;
1680  for (i = 0; i < mp4_descr_count; i++)
1681  if (mp4_descr[i].dec_config_descr_len &&
1682  mp4_descr[i].es_id == desc_es_id) {
1683  AVIOContext pb;
1684  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1685  mp4_descr[i].dec_config_descr_len, 0,
1686  NULL, NULL, NULL, NULL);
1687  ff_mp4_read_dec_config_descr(fc, st, &pb);
1688  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1689  st->codecpar->extradata_size > 0) {
1690  st->need_parsing = 0;
1691  st->internal->need_context_update = 1;
1692  }
1694  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1695  }
1696  break;
1697  case 0x1F: /* FMC descriptor */
1698  if (get16(pp, desc_end) < 0)
1699  break;
1700  if (mp4_descr_count > 0 &&
1702  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1703  st->request_probe > 0) &&
1704  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1705  AVIOContext pb;
1706  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1707  mp4_descr->dec_config_descr_len, 0,
1708  NULL, NULL, NULL, NULL);
1709  ff_mp4_read_dec_config_descr(fc, st, &pb);
1710  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1711  st->codecpar->extradata_size > 0) {
1712  st->request_probe = st->need_parsing = 0;
1714  st->internal->need_context_update = 1;
1715  }
1716  }
1717  break;
1718  case 0x56: /* DVB teletext descriptor */
1719  {
1720  uint8_t *extradata = NULL;
1721  int language_count = desc_len / 5;
1722 
1723  if (desc_len > 0 && desc_len % 5 != 0)
1724  return AVERROR_INVALIDDATA;
1725 
1726  if (language_count > 0) {
1727  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1728  av_assert0(language_count <= sizeof(language) / 4);
1729 
1730  if (st->codecpar->extradata == NULL) {
1731  if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1732  return AVERROR(ENOMEM);
1733  }
1734  }
1735 
1736  if (st->codecpar->extradata_size < language_count * 2)
1737  return AVERROR_INVALIDDATA;
1738 
1739  extradata = st->codecpar->extradata;
1740 
1741  for (i = 0; i < language_count; i++) {
1742  language[i * 4 + 0] = get8(pp, desc_end);
1743  language[i * 4 + 1] = get8(pp, desc_end);
1744  language[i * 4 + 2] = get8(pp, desc_end);
1745  language[i * 4 + 3] = ',';
1746 
1747  memcpy(extradata, *pp, 2);
1748  extradata += 2;
1749 
1750  *pp += 2;
1751  }
1752 
1753  language[i * 4 - 1] = 0;
1754  av_dict_set(&st->metadata, "language", language, 0);
1755  st->internal->need_context_update = 1;
1756  }
1757  }
1758  break;
1759  case 0x59: /* subtitling descriptor */
1760  {
1761  /* 8 bytes per DVB subtitle substream data:
1762  * ISO_639_language_code (3 bytes),
1763  * subtitling_type (1 byte),
1764  * composition_page_id (2 bytes),
1765  * ancillary_page_id (2 bytes) */
1766  int language_count = desc_len / 8;
1767 
1768  if (desc_len > 0 && desc_len % 8 != 0)
1769  return AVERROR_INVALIDDATA;
1770 
1771  if (language_count > 1) {
1772  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1773  }
1774 
1775  if (language_count > 0) {
1776  uint8_t *extradata;
1777 
1778  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1779  av_assert0(language_count <= sizeof(language) / 4);
1780 
1781  if (st->codecpar->extradata == NULL) {
1782  if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1783  return AVERROR(ENOMEM);
1784  }
1785  }
1786 
1787  if (st->codecpar->extradata_size < language_count * 5)
1788  return AVERROR_INVALIDDATA;
1789 
1790  extradata = st->codecpar->extradata;
1791 
1792  for (i = 0; i < language_count; i++) {
1793  language[i * 4 + 0] = get8(pp, desc_end);
1794  language[i * 4 + 1] = get8(pp, desc_end);
1795  language[i * 4 + 2] = get8(pp, desc_end);
1796  language[i * 4 + 3] = ',';
1797 
1798  /* hearing impaired subtitles detection using subtitling_type */
1799  switch (*pp[0]) {
1800  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1801  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1802  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1803  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1804  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1805  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1807  break;
1808  }
1809 
1810  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1811  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1812  extradata += 5;
1813 
1814  *pp += 4;
1815  }
1816 
1817  language[i * 4 - 1] = 0;
1818  av_dict_set(&st->metadata, "language", language, 0);
1819  st->internal->need_context_update = 1;
1820  }
1821  }
1822  break;
1823  case 0x0a: /* ISO 639 language descriptor */
1824  for (i = 0; i + 4 <= desc_len; i += 4) {
1825  language[i + 0] = get8(pp, desc_end);
1826  language[i + 1] = get8(pp, desc_end);
1827  language[i + 2] = get8(pp, desc_end);
1828  language[i + 3] = ',';
1829  switch (get8(pp, desc_end)) {
1830  case 0x01:
1832  break;
1833  case 0x02:
1835  break;
1836  case 0x03:
1838  break;
1839  }
1840  }
1841  if (i && language[0]) {
1842  language[i - 1] = 0;
1843  av_dict_set(&st->metadata, "language", language, 0);
1844  }
1845  break;
1846  case 0x05: /* registration descriptor */
1847  st->codecpar->codec_tag = bytestream_get_le32(pp);
1848  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1849  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1850  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1851  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1852  st->request_probe = 50;
1853  }
1854  break;
1855  case 0x52: /* stream identifier descriptor */
1856  st->stream_identifier = 1 + get8(pp, desc_end);
1857  break;
1858  case 0x26: /* metadata descriptor */
1859  if (get16(pp, desc_end) == 0xFFFF)
1860  *pp += 4;
1861  if (get8(pp, desc_end) == 0xFF) {
1862  st->codecpar->codec_tag = bytestream_get_le32(pp);
1863  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1864  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1865  }
1866  break;
1867  case 0x7f: /* DVB extension descriptor */
1868  ext_desc_tag = get8(pp, desc_end);
1869  if (ext_desc_tag < 0)
1870  return AVERROR_INVALIDDATA;
1871  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1872  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1873  if (!st->codecpar->extradata) {
1876  if (!st->codecpar->extradata)
1877  return AVERROR(ENOMEM);
1878 
1881 
1882  channel_config_code = get8(pp, desc_end);
1883  if (channel_config_code < 0)
1884  return AVERROR_INVALIDDATA;
1885  if (channel_config_code <= 0x8) {
1886  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1887  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1888  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1889  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1890  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1891  } else {
1892  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1893  }
1895  st->internal->need_context_update = 1;
1896  }
1897  }
1898  break;
1899  default:
1900  break;
1901  }
1902  *pp = desc_end;
1903  return 0;
1904 }
1905 
1906 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
1907 {
1908  return !(stream_type == 0x13 ||
1909  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
1910 }
1911 
1912 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1913 {
1914  MpegTSContext *ts = filter->u.section_filter.opaque;
1915  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1916  SectionHeader h1, *h = &h1;
1917  PESContext *pes;
1918  AVStream *st;
1919  const uint8_t *p, *p_end, *desc_list_end;
1920  int program_info_length, pcr_pid, pid, stream_type;
1921  int desc_list_len;
1922  uint32_t prog_reg_desc = 0; /* registration descriptor */
1923 
1924  int mp4_descr_count = 0;
1925  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1926  int i;
1927 
1928  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1929  hex_dump_debug(ts->stream, section, section_len);
1930 
1931  p_end = section + section_len - 4;
1932  p = section;
1933  if (parse_section_header(h, &p, p_end) < 0)
1934  return;
1935  if (skip_identical(h, tssf))
1936  return;
1937 
1938  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
1939  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
1940 
1941  if (h->tid != PMT_TID)
1942  return;
1943  if (!ts->scan_all_pmts && ts->skip_changes)
1944  return;
1945 
1946  if (!ts->skip_clear)
1947  clear_program(ts, h->id);
1948 
1949  pcr_pid = get16(&p, p_end);
1950  if (pcr_pid < 0)
1951  return;
1952  pcr_pid &= 0x1fff;
1953  add_pid_to_pmt(ts, h->id, pcr_pid);
1954  set_pcr_pid(ts->stream, h->id, pcr_pid);
1955 
1956  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1957 
1958  program_info_length = get16(&p, p_end);
1959  if (program_info_length < 0)
1960  return;
1961  program_info_length &= 0xfff;
1962  while (program_info_length >= 2) {
1963  uint8_t tag, len;
1964  tag = get8(&p, p_end);
1965  len = get8(&p, p_end);
1966 
1967  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1968 
1969  if (len > program_info_length - 2)
1970  // something else is broken, exit the program_descriptors_loop
1971  break;
1972  program_info_length -= len + 2;
1973  if (tag == 0x1d) { // IOD descriptor
1974  get8(&p, p_end); // scope
1975  get8(&p, p_end); // label
1976  len -= 2;
1977  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1978  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1979  } else if (tag == 0x05 && len >= 4) { // registration descriptor
1980  prog_reg_desc = bytestream_get_le32(&p);
1981  len -= 4;
1982  }
1983  p += len;
1984  }
1985  p += program_info_length;
1986  if (p >= p_end)
1987  goto out;
1988 
1989  // stop parsing after pmt, we found header
1990  if (!ts->stream->nb_streams)
1991  ts->stop_parse = 2;
1992 
1993  set_pmt_found(ts, h->id);
1994 
1995 
1996  for (;;) {
1997  st = 0;
1998  pes = NULL;
1999  stream_type = get8(&p, p_end);
2000  if (stream_type < 0)
2001  break;
2002  pid = get16(&p, p_end);
2003  if (pid < 0)
2004  goto out;
2005  pid &= 0x1fff;
2006  if (pid == ts->current_pid)
2007  goto out;
2008 
2009  /* now create stream */
2010  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2011  pes = ts->pids[pid]->u.pes_filter.opaque;
2012  if (!pes->st) {
2013  pes->st = avformat_new_stream(pes->stream, NULL);
2014  if (!pes->st)
2015  goto out;
2016  pes->st->id = pes->pid;
2017  }
2018  st = pes->st;
2019  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2020  if (ts->pids[pid])
2021  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2022  pes = add_pes_stream(ts, pid, pcr_pid);
2023  if (pes) {
2024  st = avformat_new_stream(pes->stream, NULL);
2025  if (!st)
2026  goto out;
2027  st->id = pes->pid;
2028  }
2029  } else {
2030  int idx = ff_find_stream_index(ts->stream, pid);
2031  if (idx >= 0) {
2032  st = ts->stream->streams[idx];
2033  } else {
2034  st = avformat_new_stream(ts->stream, NULL);
2035  if (!st)
2036  goto out;
2037  st->id = pid;
2039  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2040  mpegts_find_stream_type(st, stream_type, SCTE_types);
2041  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2042  }
2043  }
2044  }
2045 
2046  if (!st)
2047  goto out;
2048 
2049  if (pes && !pes->stream_type)
2050  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2051 
2052  add_pid_to_pmt(ts, h->id, pid);
2053 
2055 
2056  desc_list_len = get16(&p, p_end);
2057  if (desc_list_len < 0)
2058  goto out;
2059  desc_list_len &= 0xfff;
2060  desc_list_end = p + desc_list_len;
2061  if (desc_list_end > p_end)
2062  goto out;
2063  for (;;) {
2064  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2065  desc_list_end, mp4_descr,
2066  mp4_descr_count, pid, ts) < 0)
2067  break;
2068 
2069  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2070  stream_type == 0x83 && pes->sub_st) {
2072  pes->sub_st->index);
2073  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2074  }
2075  }
2076  p = desc_list_end;
2077  }
2078 
2079  if (!ts->pids[pcr_pid])
2080  mpegts_open_pcr_filter(ts, pcr_pid);
2081 
2082 out:
2083  for (i = 0; i < mp4_descr_count; i++)
2084  av_free(mp4_descr[i].dec_config_descr);
2085 }
2086 
2087 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2088 {
2089  MpegTSContext *ts = filter->u.section_filter.opaque;
2090  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2091  SectionHeader h1, *h = &h1;
2092  const uint8_t *p, *p_end;
2093  int sid, pmt_pid;
2094  AVProgram *program;
2095 
2096  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2097  hex_dump_debug(ts->stream, section, section_len);
2098 
2099  p_end = section + section_len - 4;
2100  p = section;
2101  if (parse_section_header(h, &p, p_end) < 0)
2102  return;
2103  if (h->tid != PAT_TID)
2104  return;
2105  if (ts->skip_changes)
2106  return;
2107 
2108  if (skip_identical(h, tssf))
2109  return;
2110  ts->stream->ts_id = h->id;
2111 
2112  clear_programs(ts);
2113  for (;;) {
2114  sid = get16(&p, p_end);
2115  if (sid < 0)
2116  break;
2117  pmt_pid = get16(&p, p_end);
2118  if (pmt_pid < 0)
2119  break;
2120  pmt_pid &= 0x1fff;
2121 
2122  if (pmt_pid == ts->current_pid)
2123  break;
2124 
2125  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2126 
2127  if (sid == 0x0000) {
2128  /* NIT info */
2129  } else {
2130  MpegTSFilter *fil = ts->pids[pmt_pid];
2131  program = av_new_program(ts->stream, sid);
2132  if (program) {
2133  program->program_num = sid;
2134  program->pmt_pid = pmt_pid;
2135  }
2136  if (fil)
2137  if ( fil->type != MPEGTS_SECTION
2138  || fil->pid != pmt_pid
2139  || fil->u.section_filter.section_cb != pmt_cb)
2140  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2141 
2142  if (!ts->pids[pmt_pid])
2143  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2144  add_pat_entry(ts, sid);
2145  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2146  add_pid_to_pmt(ts, sid, pmt_pid);
2147  }
2148  }
2149 
2150  if (sid < 0) {
2151  int i,j;
2152  for (j=0; j<ts->stream->nb_programs; j++) {
2153  for (i = 0; i < ts->nb_prg; i++)
2154  if (ts->prg[i].id == ts->stream->programs[j]->id)
2155  break;
2156  if (i==ts->nb_prg && !ts->skip_clear)
2157  clear_avprogram(ts, ts->stream->programs[j]->id);
2158  }
2159  }
2160 }
2161 
2162 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2163 {
2164  MpegTSContext *ts = filter->u.section_filter.opaque;
2165  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2166  SectionHeader h1, *h = &h1;
2167  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2168  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2169  char *name, *provider_name;
2170 
2171  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2172  hex_dump_debug(ts->stream, section, section_len);
2173 
2174  p_end = section + section_len - 4;
2175  p = section;
2176  if (parse_section_header(h, &p, p_end) < 0)
2177  return;
2178  if (h->tid != SDT_TID)
2179  return;
2180  if (ts->skip_changes)
2181  return;
2182  if (skip_identical(h, tssf))
2183  return;
2184 
2185  onid = get16(&p, p_end);
2186  if (onid < 0)
2187  return;
2188  val = get8(&p, p_end);
2189  if (val < 0)
2190  return;
2191  for (;;) {
2192  sid = get16(&p, p_end);
2193  if (sid < 0)
2194  break;
2195  val = get8(&p, p_end);
2196  if (val < 0)
2197  break;
2198  desc_list_len = get16(&p, p_end);
2199  if (desc_list_len < 0)
2200  break;
2201  desc_list_len &= 0xfff;
2202  desc_list_end = p + desc_list_len;
2203  if (desc_list_end > p_end)
2204  break;
2205  for (;;) {
2206  desc_tag = get8(&p, desc_list_end);
2207  if (desc_tag < 0)
2208  break;
2209  desc_len = get8(&p, desc_list_end);
2210  desc_end = p + desc_len;
2211  if (desc_len < 0 || desc_end > desc_list_end)
2212  break;
2213 
2214  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2215  desc_tag, desc_len);
2216 
2217  switch (desc_tag) {
2218  case 0x48:
2219  service_type = get8(&p, p_end);
2220  if (service_type < 0)
2221  break;
2222  provider_name = getstr8(&p, p_end);
2223  if (!provider_name)
2224  break;
2225  name = getstr8(&p, p_end);
2226  if (name) {
2227  AVProgram *program = av_new_program(ts->stream, sid);
2228  if (program) {
2229  av_dict_set(&program->metadata, "service_name", name, 0);
2230  av_dict_set(&program->metadata, "service_provider",
2231  provider_name, 0);
2232  }
2233  }
2234  av_free(name);
2235  av_free(provider_name);
2236  break;
2237  default:
2238  break;
2239  }
2240  p = desc_end;
2241  }
2242  p = desc_list_end;
2243  }
2244 }
2245 
2246 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2247  const uint8_t *packet);
2248 
2249 /* handle one TS packet */
2250 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2251 {
2252  MpegTSFilter *tss;
2253  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2254  has_adaptation, has_payload;
2255  const uint8_t *p, *p_end;
2256  int64_t pos;
2257 
2258  pid = AV_RB16(packet + 1) & 0x1fff;
2259  if (pid && discard_pid(ts, pid))
2260  return 0;
2261  is_start = packet[1] & 0x40;
2262  tss = ts->pids[pid];
2263  if (ts->auto_guess && !tss && is_start) {
2264  add_pes_stream(ts, pid, -1);
2265  tss = ts->pids[pid];
2266  }
2267  if (!tss)
2268  return 0;
2269  ts->current_pid = pid;
2270 
2271  afc = (packet[3] >> 4) & 3;
2272  if (afc == 0) /* reserved value */
2273  return 0;
2274  has_adaptation = afc & 2;
2275  has_payload = afc & 1;
2276  is_discontinuity = has_adaptation &&
2277  packet[4] != 0 && /* with length > 0 */
2278  (packet[5] & 0x80); /* and discontinuity indicated */
2279 
2280  /* continuity check (currently not used) */
2281  cc = (packet[3] & 0xf);
2282  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2283  cc_ok = pid == 0x1FFF || // null packet PID
2284  is_discontinuity ||
2285  tss->last_cc < 0 ||
2286  expected_cc == cc;
2287 
2288  tss->last_cc = cc;
2289  if (!cc_ok) {
2290  av_log(ts->stream, AV_LOG_DEBUG,
2291  "Continuity check failed for pid %d expected %d got %d\n",
2292  pid, expected_cc, cc);
2293  if (tss->type == MPEGTS_PES) {
2294  PESContext *pc = tss->u.pes_filter.opaque;
2295  pc->flags |= AV_PKT_FLAG_CORRUPT;
2296  }
2297  }
2298 
2299  p = packet + 4;
2300  if (has_adaptation) {
2301  int64_t pcr_h;
2302  int pcr_l;
2303  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2304  tss->last_pcr = pcr_h * 300 + pcr_l;
2305  /* skip adaptation field */
2306  p += p[0] + 1;
2307  }
2308  /* if past the end of packet, ignore */
2309  p_end = packet + TS_PACKET_SIZE;
2310  if (p >= p_end || !has_payload)
2311  return 0;
2312 
2313  pos = avio_tell(ts->stream->pb);
2314  if (pos >= 0) {
2315  av_assert0(pos >= TS_PACKET_SIZE);
2316  ts->pos47_full = pos - TS_PACKET_SIZE;
2317  }
2318 
2319  if (tss->type == MPEGTS_SECTION) {
2320  if (is_start) {
2321  /* pointer field present */
2322  len = *p++;
2323  if (len > p_end - p)
2324  return 0;
2325  if (len && cc_ok) {
2326  /* write remaining section bytes */
2327  write_section_data(ts, tss,
2328  p, len, 0);
2329  /* check whether filter has been closed */
2330  if (!ts->pids[pid])
2331  return 0;
2332  }
2333  p += len;
2334  if (p < p_end) {
2335  write_section_data(ts, tss,
2336  p, p_end - p, 1);
2337  }
2338  } else {
2339  if (cc_ok) {
2340  write_section_data(ts, tss,
2341  p, p_end - p, 0);
2342  }
2343  }
2344 
2345  // stop find_stream_info from waiting for more streams
2346  // when all programs have received a PMT
2347  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2348  int i;
2349  for (i = 0; i < ts->nb_prg; i++) {
2350  if (!ts->prg[i].pmt_found)
2351  break;
2352  }
2353  if (i == ts->nb_prg && ts->nb_prg > 0) {
2354  int types = 0;
2355  for (i = 0; i < ts->stream->nb_streams; i++) {
2356  AVStream *st = ts->stream->streams[i];
2357  if (st->codecpar->codec_type >= 0)
2358  types |= 1<<st->codecpar->codec_type;
2359  }
2360  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2361  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2363  }
2364  }
2365  }
2366 
2367  } else {
2368  int ret;
2369  // Note: The position here points actually behind the current packet.
2370  if (tss->type == MPEGTS_PES) {
2371  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2372  pos - ts->raw_packet_size)) < 0)
2373  return ret;
2374  }
2375  }
2376 
2377  return 0;
2378 }
2379 
2380 static void reanalyze(MpegTSContext *ts) {
2381  AVIOContext *pb = ts->stream->pb;
2382  int64_t pos = avio_tell(pb);
2383  if (pos < 0)
2384  return;
2385  pos -= ts->pos47_full;
2386  if (pos == TS_PACKET_SIZE) {
2387  ts->size_stat[0] ++;
2388  } else if (pos == TS_DVHS_PACKET_SIZE) {
2389  ts->size_stat[1] ++;
2390  } else if (pos == TS_FEC_PACKET_SIZE) {
2391  ts->size_stat[2] ++;
2392  }
2393 
2394  ts->size_stat_count ++;
2396  int newsize = 0;
2397  if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2398  newsize = TS_PACKET_SIZE;
2399  } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2400  newsize = TS_DVHS_PACKET_SIZE;
2401  } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2402  newsize = TS_FEC_PACKET_SIZE;
2403  }
2404  if (newsize && newsize != ts->raw_packet_size) {
2405  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2406  ts->raw_packet_size = newsize;
2407  }
2408  ts->size_stat_count = 0;
2409  memset(ts->size_stat, 0, sizeof(ts->size_stat));
2410  }
2411 }
2412 
2413 /* XXX: try to find a better synchro over several packets (use
2414  * get_packet_size() ?) */
2415 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2416 {
2417  MpegTSContext *ts = s->priv_data;
2418  AVIOContext *pb = s->pb;
2419  int c, i;
2420  uint64_t pos = avio_tell(pb);
2421 
2422  avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2423 
2424  //Special case for files like 01c56b0dc1.ts
2425  if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2426  avio_seek(pb, 12, SEEK_CUR);
2427  return 0;
2428  }
2429 
2430  for (i = 0; i < ts->resync_size; i++) {
2431  c = avio_r8(pb);
2432  if (avio_feof(pb))
2433  return AVERROR_EOF;
2434  if (c == 0x47) {
2435  avio_seek(pb, -1, SEEK_CUR);
2436  reanalyze(s->priv_data);
2437  return 0;
2438  }
2439  }
2440  av_log(s, AV_LOG_ERROR,
2441  "max resync size reached, could not find sync byte\n");
2442  /* no sync found */
2443  return AVERROR_INVALIDDATA;
2444 }
2445 
2446 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2447 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2448  const uint8_t **data)
2449 {
2450  AVIOContext *pb = s->pb;
2451  int len;
2452 
2453  for (;;) {
2454  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2455  if (len != TS_PACKET_SIZE)
2456  return len < 0 ? len : AVERROR_EOF;
2457  /* check packet sync byte */
2458  if ((*data)[0] != 0x47) {
2459  /* find a new packet start */
2460 
2461  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2462  return AVERROR(EAGAIN);
2463  else
2464  continue;
2465  } else {
2466  break;
2467  }
2468  }
2469  return 0;
2470 }
2471 
2472 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2473 {
2474  AVIOContext *pb = s->pb;
2475  int skip = raw_packet_size - TS_PACKET_SIZE;
2476  if (skip > 0)
2477  avio_skip(pb, skip);
2478 }
2479 
2480 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2481 {
2482  AVFormatContext *s = ts->stream;
2484  const uint8_t *data;
2485  int64_t packet_num;
2486  int ret = 0;
2487 
2488  if (avio_tell(s->pb) != ts->last_pos) {
2489  int i;
2490  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2491  /* seek detected, flush pes buffer */
2492  for (i = 0; i < NB_PID_MAX; i++) {
2493  if (ts->pids[i]) {
2494  if (ts->pids[i]->type == MPEGTS_PES) {
2495  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2496  av_buffer_unref(&pes->buffer);
2497  pes->data_index = 0;
2498  pes->state = MPEGTS_SKIP; /* skip until pes header */
2499  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2500  ts->pids[i]->u.section_filter.last_ver = -1;
2501  }
2502  ts->pids[i]->last_cc = -1;
2503  ts->pids[i]->last_pcr = -1;
2504  }
2505  }
2506  }
2507 
2508  ts->stop_parse = 0;
2509  packet_num = 0;
2510  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2511  for (;;) {
2512  packet_num++;
2513  if (nb_packets != 0 && packet_num >= nb_packets ||
2514  ts->stop_parse > 1) {
2515  ret = AVERROR(EAGAIN);
2516  break;
2517  }
2518  if (ts->stop_parse > 0)
2519  break;
2520 
2521  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2522  if (ret != 0)
2523  break;
2524  ret = handle_packet(ts, data);
2526  if (ret != 0)
2527  break;
2528  }
2529  ts->last_pos = avio_tell(s->pb);
2530  return ret;
2531 }
2532 
2534 {
2535  const int size = p->buf_size;
2536  int maxscore = 0;
2537  int sumscore = 0;
2538  int i;
2539  int check_count = size / TS_FEC_PACKET_SIZE;
2540 #define CHECK_COUNT 10
2541 #define CHECK_BLOCK 100
2542 
2543  if (!check_count)
2544  return 0;
2545 
2546  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2547  int left = FFMIN(check_count - i, CHECK_BLOCK);
2548  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2549  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2550  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2551  score = FFMAX3(score, dvhs_score, fec_score);
2552  sumscore += score;
2553  maxscore = FFMAX(maxscore, score);
2554  }
2555 
2556  sumscore = sumscore * CHECK_COUNT / check_count;
2557  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2558 
2559  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2560 
2561  if (check_count > CHECK_COUNT && sumscore > 6) {
2562  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2563  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2564  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2565  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2566  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2567  } else if (sumscore > 6) {
2568  return 2;
2569  } else {
2570  return 0;
2571  }
2572 }
2573 
2574 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2575  * (-1) if not available */
2576 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2577 {
2578  int afc, len, flags;
2579  const uint8_t *p;
2580  unsigned int v;
2581 
2582  afc = (packet[3] >> 4) & 3;
2583  if (afc <= 1)
2584  return AVERROR_INVALIDDATA;
2585  p = packet + 4;
2586  len = p[0];
2587  p++;
2588  if (len == 0)
2589  return AVERROR_INVALIDDATA;
2590  flags = *p++;
2591  len--;
2592  if (!(flags & 0x10))
2593  return AVERROR_INVALIDDATA;
2594  if (len < 6)
2595  return AVERROR_INVALIDDATA;
2596  v = AV_RB32(p);
2597  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2598  *ppcr_low = ((p[4] & 1) << 8) | p[5];
2599  return 0;
2600 }
2601 
2602 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2603 
2604  /* NOTE: We attempt to seek on non-seekable files as well, as the
2605  * probe buffer usually is big enough. Only warn if the seek failed
2606  * on files where the seek should work. */
2607  if (avio_seek(pb, pos, SEEK_SET) < 0)
2608  av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2609 }
2610 
2612 {
2613  MpegTSContext *ts = s->priv_data;
2614  AVIOContext *pb = s->pb;
2615  uint8_t buf[8 * 1024] = {0};
2616  int len;
2617  int64_t pos, probesize = s->probesize;
2618 
2619  if (ffio_ensure_seekback(pb, probesize) < 0)
2620  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2621 
2622  /* read the first 8192 bytes to get packet size */
2623  pos = avio_tell(pb);
2624  len = avio_read(pb, buf, sizeof(buf));
2625  ts->raw_packet_size = get_packet_size(buf, len);
2626  if (ts->raw_packet_size <= 0) {
2627  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2629  }
2630  ts->stream = s;
2631  ts->auto_guess = 0;
2632 
2633  if (s->iformat == &ff_mpegts_demuxer) {
2634  /* normal demux */
2635 
2636  /* first do a scan to get all the services */
2637  seek_back(s, pb, pos);
2638 
2640 
2642 
2643  handle_packets(ts, probesize / ts->raw_packet_size);
2644  /* if could not find service, enable auto_guess */
2645 
2646  ts->auto_guess = 1;
2647 
2648  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2649 
2651  } else {
2652  AVStream *st;
2653  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2654  int64_t pcrs[2], pcr_h;
2655  int packet_count[2];
2656  uint8_t packet[TS_PACKET_SIZE];
2657  const uint8_t *data;
2658 
2659  /* only read packets */
2660 
2661  st = avformat_new_stream(s, NULL);
2662  if (!st)
2663  return AVERROR(ENOMEM);
2664  avpriv_set_pts_info(st, 60, 1, 27000000);
2667 
2668  /* we iterate until we find two PCRs to estimate the bitrate */
2669  pcr_pid = -1;
2670  nb_pcrs = 0;
2671  nb_packets = 0;
2672  for (;;) {
2673  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2674  if (ret < 0)
2675  return ret;
2676  pid = AV_RB16(data + 1) & 0x1fff;
2677  if ((pcr_pid == -1 || pcr_pid == pid) &&
2678  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2680  pcr_pid = pid;
2681  packet_count[nb_pcrs] = nb_packets;
2682  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2683  nb_pcrs++;
2684  if (nb_pcrs >= 2) {
2685  if (pcrs[1] - pcrs[0] > 0) {
2686  /* the difference needs to be positive to make sense for bitrate computation */
2687  break;
2688  } else {
2689  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2690  pcrs[0] = pcrs[1];
2691  packet_count[0] = packet_count[1];
2692  nb_pcrs--;
2693  }
2694  }
2695  } else {
2697  }
2698  nb_packets++;
2699  }
2700 
2701  /* NOTE1: the bitrate is computed without the FEC */
2702  /* NOTE2: it is only the bitrate of the start of the stream */
2703  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2704  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2705  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2706  st->codecpar->bit_rate = s->bit_rate;
2707  st->start_time = ts->cur_pcr;
2708  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2709  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2710  }
2711 
2712  seek_back(s, pb, pos);
2713  return 0;
2714 }
2715 
2716 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2717 
2719 {
2720  MpegTSContext *ts = s->priv_data;
2721  int ret, i;
2722  int64_t pcr_h, next_pcr_h, pos;
2723  int pcr_l, next_pcr_l;
2724  uint8_t pcr_buf[12];
2725  const uint8_t *data;
2726 
2727  if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2728  return AVERROR(ENOMEM);
2729  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2730  pkt->pos = avio_tell(s->pb);
2731  if (ret < 0) {
2732  av_packet_unref(pkt);
2733  return ret;
2734  }
2735  if (data != pkt->data)
2736  memcpy(pkt->data, data, ts->raw_packet_size);
2738  if (ts->mpeg2ts_compute_pcr) {
2739  /* compute exact PCR for each packet */
2740  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2741  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2742  pos = avio_tell(s->pb);
2743  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2744  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2745  avio_read(s->pb, pcr_buf, 12);
2746  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2747  /* XXX: not precise enough */
2748  ts->pcr_incr =
2749  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2750  (i + 1);
2751  break;
2752  }
2753  }
2754  avio_seek(s->pb, pos, SEEK_SET);
2755  /* no next PCR found: we use previous increment */
2756  ts->cur_pcr = pcr_h * 300 + pcr_l;
2757  }
2758  pkt->pts = ts->cur_pcr;
2759  pkt->duration = ts->pcr_incr;
2760  ts->cur_pcr += ts->pcr_incr;
2761  }
2762  pkt->stream_index = 0;
2763  return 0;
2764 }
2765 
2767 {
2768  MpegTSContext *ts = s->priv_data;
2769  int ret, i;
2770 
2771  pkt->size = -1;
2772  ts->pkt = pkt;
2773  ret = handle_packets(ts, 0);
2774  if (ret < 0) {
2775  av_packet_unref(ts->pkt);
2776  /* flush pes data left */
2777  for (i = 0; i < NB_PID_MAX; i++)
2778  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2779  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2780  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2781  ret = new_pes_packet(pes, pkt);
2782  if (ret < 0)
2783  return ret;
2784  pes->state = MPEGTS_SKIP;
2785  ret = 0;
2786  break;
2787  }
2788  }
2789  }
2790 
2791  if (!ret && pkt->size < 0)
2792  ret = AVERROR_INVALIDDATA;
2793  return ret;
2794 }
2795 
2796 static void mpegts_free(MpegTSContext *ts)
2797 {
2798  int i;
2799 
2800  clear_programs(ts);
2801 
2802  for (i = 0; i < NB_PID_MAX; i++)
2803  if (ts->pids[i])
2804  mpegts_close_filter(ts, ts->pids[i]);
2805 }
2806 
2808 {
2809  MpegTSContext *ts = s->priv_data;
2810  mpegts_free(ts);
2811  return 0;
2812 }
2813 
2814 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2815  int64_t *ppos, int64_t pos_limit)
2816 {
2817  MpegTSContext *ts = s->priv_data;
2818  int64_t pos, timestamp;
2820  int pcr_l, pcr_pid =
2821  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2822  int pos47 = ts->pos47_full % ts->raw_packet_size;
2823  pos =
2824  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2825  ts->raw_packet_size + pos47;
2826  while(pos < pos_limit) {
2827  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2828  return AV_NOPTS_VALUE;
2829  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2830  return AV_NOPTS_VALUE;
2831  if (buf[0] != 0x47) {
2832  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2833  return AV_NOPTS_VALUE;
2834  pos = avio_tell(s->pb);
2835  continue;
2836  }
2837  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2838  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
2839  *ppos = pos;
2840  return timestamp;
2841  }
2842  pos += ts->raw_packet_size;
2843  }
2844 
2845  return AV_NOPTS_VALUE;
2846 }
2847 
2848 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2849  int64_t *ppos, int64_t pos_limit)
2850 {
2851  MpegTSContext *ts = s->priv_data;
2852  int64_t pos;
2853  int pos47 = ts->pos47_full % ts->raw_packet_size;
2854  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2856  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2857  return AV_NOPTS_VALUE;
2858  while(pos < pos_limit) {
2859  int ret;
2860  AVPacket pkt;
2861  av_init_packet(&pkt);
2862  ret = av_read_frame(s, &pkt);
2863  if (ret < 0)
2864  return AV_NOPTS_VALUE;
2865  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2866  ff_reduce_index(s, pkt.stream_index);
2867  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2868  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2869  int64_t dts = pkt.dts;
2870  *ppos = pkt.pos;
2871  av_packet_unref(&pkt);
2872  return dts;
2873  }
2874  }
2875  pos = pkt.pos;
2876  av_packet_unref(&pkt);
2877  }
2878 
2879  return AV_NOPTS_VALUE;
2880 }
2881 
2882 /**************************************************************/
2883 /* parsing functions - called from other demuxers such as RTP */
2884 
2886 {
2887  MpegTSContext *ts;
2888 
2889  ts = av_mallocz(sizeof(MpegTSContext));
2890  if (!ts)
2891  return NULL;
2892  /* no stream case, currently used by RTP */
2894  ts->stream = s;
2895  ts->auto_guess = 1;
2898 
2899  return ts;
2900 }
2901 
2902 /* return the consumed length if a packet was output, or -1 if no
2903  * packet is output */
2905  const uint8_t *buf, int len)
2906 {
2907  int len1;
2908 
2909  len1 = len;
2910  ts->pkt = pkt;
2911  for (;;) {
2912  ts->stop_parse = 0;
2913  if (len < TS_PACKET_SIZE)
2914  return AVERROR_INVALIDDATA;
2915  if (buf[0] != 0x47) {
2916  buf++;
2917  len--;
2918  } else {
2919  handle_packet(ts, buf);
2920  buf += TS_PACKET_SIZE;
2921  len -= TS_PACKET_SIZE;
2922  if (ts->stop_parse == 1)
2923  break;
2924  }
2925  }
2926  return len1 - len;
2927 }
2928 
2930 {
2931  mpegts_free(ts);
2932  av_free(ts);
2933 }
2934 
2935 AVInputFormat ff_mpegts_demuxer = {
2936  .name = "mpegts",
2937  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2938  .priv_data_size = sizeof(MpegTSContext),
2943  .read_timestamp = mpegts_get_dts,
2945  .priv_class = &mpegts_class,
2946 };
2947 
2949  .name = "mpegtsraw",
2950  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2951  .priv_data_size = sizeof(MpegTSContext),
2955  .read_timestamp = mpegts_get_dts,
2957  .priv_class = &mpegtsraw_class,
2958 };
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:2796
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:1480
uint8_t last_sec_num
Definition: mpegts.c:591
#define NULL
Definition: coverity.c:32
#define SDT_PID
Definition: mpegts.h:37
int64_t pos47_full
Definition: mpegts.c:122
const char const char void * val
Definition: avisynth_c.h:771
int64_t last_pcr
Definition: mpegts.c:93
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
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:253
int total_size
Definition: mpegts.c:235
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:457
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2472
AVOption.
Definition: opt.h:246
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 intended for exporting values to the caller.
Definition: opt.h:287
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:1957
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:2716
enum AVMediaType codec_type
Definition: mpegts.c:686
int64_t dts
Definition: mpegts.c:239
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1367
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
#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:2250
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1621
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:4578
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:204
static int mpegts_probe(AVProbeData *p)
Definition: mpegts.c:2533
#define MP4ODescrTag
Definition: isom.h:251
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:1068
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:2885
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:3981
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1173
int index
stream index in AVFormatContext
Definition: avformat.h:890
int size
Definition: avcodec.h:1602
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:230
uint8_t version
Definition: mpegts.c:589
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1440
int size_stat_count
Definition: mpegts.c:119
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:849
Contain timestamp estimated through PCR of program stream.
Definition: avcodec.h:634
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:2935
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2162
void * priv_data
Definition: avformat.h:904
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:851
#define M4OD_TID
Definition: mpegts.h:42
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:655
discard all
Definition: avcodec.h:787
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:2766
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:742
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1387
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:94
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2415
int packet_seq_num_len
Definition: mpegts.h:87
int es_id
Definition: mpegts.h:91
int inst_bitrate_len
Definition: mpegts.h:84
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:155
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:480
int last_cc
Definition: mpegts.c:92
Format I/O context.
Definition: avformat.h:1338
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2447
unsigned int nb_stream_indexes
Definition: avformat.h:1270
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:1836
#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:1885
#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:935
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:2611
AVFormatContext * s
Definition: mpegts.c:1302
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:1110
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:197
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:2848
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1291
AVOptions.
int size_stat[3]
Definition: mpegts.c:118
int au_seq_num_len
Definition: mpegts.h:86
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:757
int stop_parse
stop parsing loop
Definition: mpegts.c:138
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1381
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:1619
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:1007
int id
Format-specific stream ID.
Definition: avformat.h:896
enum AVStreamParseType need_parsing
Definition: avformat.h:1076
int use_au_start
Definition: mpegts.h:74
static const AVOption raw_options[]
Definition: mpegts.c:189
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4211
int pmt_pid
Definition: avformat.h:1274
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1636
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:1406
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Public header for CRC hash function implementation.
Mp4Descr * descr
Definition: mpegts.c:1304
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:661
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1334
uint8_t * data
Definition: avcodec.h:1601
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4307
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
MpegTSState
Definition: mpegts.c:210
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1412
#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:511
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:2602
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1268
static int probe(AVProbeData *p)
Definition: act.c:36
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1276
unsigned int * stream_index
Definition: avformat.h:1269
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:604
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4010
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:2948
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1312
MPEGTS stream ID, this is required to pass the stream ID information from the demuxer to the correspo...
Definition: avcodec.h:1532
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:827
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:568
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:352
enum AVCodecID codec_id
Definition: mpegts.c:687
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:469
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:3935
static const uint8_t opus_default_extradata[30]
Definition: opus.h:66
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:482
static void reanalyze(MpegTSContext *ts)
Definition: mpegts.c:2380
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const StreamType SCTE_types[]
Definition: mpegts.c:729
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1309
static const StreamType HDMV_types[]
Definition: mpegts.c:713
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:488
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:2807
unsigned int check_crc
Definition: mpegts.c:83
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2718
#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:4006
const char * r
Definition: vf_curves.c:111
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1493
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3977
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1584
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:3006
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1265
#define FFMAX(a, b)
Definition: common.h:94
static int64_t ff_parse_pes_pts(const uint8_t *buf)
Parse MPEG-PES five-byte timestamp.
Definition: mpeg.h:67
int timestamp_len
Definition: mpegts.h:81
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1402
int flags
copied to the AVPacket flags
Definition: mpegts.c:234
int program_num
Definition: avformat.h:1273
#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:1607
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3999
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:595
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:215
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:464
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1394
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:4662
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
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:3187
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:741
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:735
uint16_t id
Definition: mpegts.c:588
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:1527
#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:252
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:82
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:790
AVDictionary * metadata
Definition: avformat.h:958
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1632
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1458
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1416
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:1628
#define CHECK_BLOCK
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:928
uint8_t sec_num
Definition: mpegts.c:590
int extended_stream_id
Definition: mpegts.c:237
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:196
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:690
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:514
int ts_id
Transport stream id.
Definition: avformat.h:1654
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:850
Stream structure.
Definition: avformat.h:889
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:649
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2814
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define TS_MAX_PACKET_SIZE
Definition: mpegts.h:30
uint8_t * dec_config_descr
Definition: mpegts.h:93
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1230
unsigned int id
Definition: mpegts.c:103
#define MP4DecConfigDescrTag
Definition: isom.h:254
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:1380
static const StreamType METADATA_types[]
Definition: mpegts.c:757
int use_au_end
Definition: mpegts.h:75
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1344
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:568
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:888
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:563
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
void * buf
Definition: avisynth_c.h:690
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:221
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:605
GLint GLenum type
Definition: opengl_enc.c:105
#define MAX_LEVEL
Definition: mpegts.c:1300
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:101
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:2576
int use_timestamps
Definition: mpegts.h:78
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1912
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:179
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:2904
AVMediaType
Definition: avutil.h:193
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:764
This structure contains the data a format has to probe a file.
Definition: avformat.h:461
int use_idle
Definition: mpegts.h:79
SLConfigDescr sl
Definition: mpegts.c:243
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1688
int dec_config_descr_len
Definition: mpegts.h:92
uint8_t * section_buf
Definition: mpegts.c:82
uint8_t tid
Definition: mpegts.c:587
AVDictionary * metadata
Definition: avformat.h:1271
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
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:1647
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:930
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:473
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:810
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:2087
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:448
static const AVClass mpegts_class
Definition: mpegts.c:182
int use_rand_acc_pt
Definition: mpegts.h:76
int data_index
Definition: mpegts.c:233
if(ret< 0)
Definition: vf_mcdeint.c:282
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1185
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:936
unsigned crc
Definition: mpegts.c:80
union MpegTSFilter::@211 u
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:947
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:241
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:872
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:1906
#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:1634
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1350
PESCallback * pes_cb
Definition: mpegts.c:68
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:594
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:734
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:647
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:618
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1305
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:1366
int pcr_pid
Definition: avformat.h:1275
int64_t last_pos
to detect seek
Definition: mpegts.c:142
int timestamp_res
Definition: mpegts.h:80
static AVCodec * c
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:292
#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:3995
int use_padding
Definition: mpegts.h:77
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:168
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:1600
FILE * out
Definition: movenc.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
AVCodecParameters * codecpar
Definition: avformat.h:1241
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3985
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:508
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1606
int degr_prior_len
Definition: mpegts.h:85
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1355
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:318
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1543
AVIOContext pb
Definition: mpegts.c:1303
int stream_index
Definition: avcodec.h:1603
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:949
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:773
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:2929
int au_len
Definition: mpegts.h:83
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1122
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1578
#define R8_CHECK_CLIP_MAX(dst, maxv)
uint32_t stream_type
Definition: mpegts.c:685
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:633
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1594
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
Definition: mpegts.c:881
#define FFMAX3(a, b, c)
Definition: common.h:95
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:126
AVProgram ** programs
Definition: avformat.h:1494
#define MP4SLDescrTag
Definition: isom.h:256
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:2480
#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:1511