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mpegts.c
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1 /*
2  * MPEG2 transport stream (aka DVB) demuxer
3  * Copyright (c) 2002-2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/log.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/avassert.h"
30 #include "libavcodec/bytestream.h"
31 #include "libavcodec/get_bits.h"
32 #include "libavcodec/opus.h"
33 #include "avformat.h"
34 #include "mpegts.h"
35 #include "internal.h"
36 #include "avio_internal.h"
37 #include "mpeg.h"
38 #include "isom.h"
39 
40 /* maximum size in which we look for synchronisation if
41  * synchronisation is lost */
42 #define MAX_RESYNC_SIZE 65536
43 
44 #define MAX_PES_PAYLOAD 200 * 1024
45 
46 #define MAX_MP4_DESCR_COUNT 16
47 
48 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
49  do { \
50  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
51  (modulus) = (dividend) % (divisor); \
52  (prev_dividend) = (dividend); \
53  } while (0)
54 
59 };
60 
61 typedef struct MpegTSFilter MpegTSFilter;
62 
63 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
64  int is_start, int64_t pos);
65 
66 typedef struct MpegTSPESFilter {
68  void *opaque;
70 
71 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
72 
73 typedef void SetServiceCallback (void *opaque, int ret);
74 
75 typedef struct MpegTSSectionFilter {
78  int last_ver;
79  unsigned crc;
80  unsigned last_crc;
82  unsigned int check_crc : 1;
83  unsigned int end_of_section_reached : 1;
85  void *opaque;
87 
88 struct MpegTSFilter {
89  int pid;
90  int es_id;
91  int last_cc; /* last cc code (-1 if first packet) */
92  int64_t last_pcr;
94  union {
97  } u;
98 };
99 
100 #define MAX_PIDS_PER_PROGRAM 64
101 struct Program {
102  unsigned int id; // program id/service id
103  unsigned int nb_pids;
104  unsigned int pids[MAX_PIDS_PER_PROGRAM];
105 
106  /** have we found pmt for this program */
108 };
109 
111  const AVClass *class;
112  /* user data */
114  /** raw packet size, including FEC if present */
116 
117  int size_stat[3];
119 #define SIZE_STAT_THRESHOLD 10
120 
121  int64_t pos47_full;
122 
123  /** if true, all pids are analyzed to find streams */
125 
126  /** compute exact PCR for each transport stream packet */
128 
129  /** fix dvb teletext pts */
131 
132  int64_t cur_pcr; /**< used to estimate the exact PCR */
133  int pcr_incr; /**< used to estimate the exact PCR */
134 
135  /* data needed to handle file based ts */
136  /** stop parsing loop */
138  /** packet containing Audio/Video data */
140  /** to detect seek */
141  int64_t last_pos;
142 
145 
147 
149 
150  /******************************************/
151  /* private mpegts data */
152  /* scan context */
153  /** structure to keep track of Program->pids mapping */
154  unsigned int nb_prg;
155  struct Program *prg;
156 
158  /** filters for various streams specified by PMT + for the PAT and PMT */
161 };
162 
163 #define MPEGTS_OPTIONS \
164  { "resync_size", "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 }
165 
166 static const AVOption options[] = {
168  {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
169  {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
170  {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
172  {"scan_all_pmts", "Scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_INT,
173  { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
174  {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT,
175  {.i64 = 0}, 0, 1, 0 },
176  {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT,
177  {.i64 = 0}, 0, 1, 0 },
178  { NULL },
179 };
180 
181 static const AVClass mpegts_class = {
182  .class_name = "mpegts demuxer",
183  .item_name = av_default_item_name,
184  .option = options,
185  .version = LIBAVUTIL_VERSION_INT,
186 };
187 
188 static const AVOption raw_options[] = {
190  { "compute_pcr", "Compute exact PCR for each transport stream packet.",
191  offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
192  { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193  { "ts_packetsize", "Output option carrying the raw packet size.",
194  offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
195  { .i64 = 0 }, 0, 0,
197  { NULL },
198 };
199 
200 static const AVClass mpegtsraw_class = {
201  .class_name = "mpegtsraw demuxer",
202  .item_name = av_default_item_name,
203  .option = raw_options,
204  .version = LIBAVUTIL_VERSION_INT,
205 };
206 
207 /* TS stream handling */
208 
215 };
216 
217 /* enough for PES header + length */
218 #define PES_START_SIZE 6
219 #define PES_HEADER_SIZE 9
220 #define MAX_PES_HEADER_SIZE (9 + 255)
221 
222 typedef struct PESContext {
223  int pid;
224  int pcr_pid; /**< if -1 then all packets containing PCR are considered */
229  AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
231  /* used to get the format */
233  int flags; /**< copied to the AVPacket flags */
237  int64_t pts, dts;
238  int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
242 } PESContext;
243 
245 
246 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
247 {
248  int i;
249  for (i = 0; i < ts->nb_prg; i++) {
250  if (ts->prg[i].id == programid) {
251  return &ts->prg[i];
252  }
253  }
254  return NULL;
255 }
256 
257 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
258 {
259  AVProgram *prg = NULL;
260  int i;
261 
262  for (i = 0; i < ts->stream->nb_programs; i++)
263  if (ts->stream->programs[i]->id == programid) {
264  prg = ts->stream->programs[i];
265  break;
266  }
267  if (!prg)
268  return;
269  prg->nb_stream_indexes = 0;
270 }
271 
272 static void clear_program(MpegTSContext *ts, unsigned int programid)
273 {
274  int i;
275 
276  clear_avprogram(ts, programid);
277  for (i = 0; i < ts->nb_prg; i++)
278  if (ts->prg[i].id == programid) {
279  ts->prg[i].nb_pids = 0;
280  ts->prg[i].pmt_found = 0;
281  }
282 }
283 
285 {
286  av_freep(&ts->prg);
287  ts->nb_prg = 0;
288 }
289 
290 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
291 {
292  struct Program *p;
293  if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
294  ts->nb_prg = 0;
295  return;
296  }
297  p = &ts->prg[ts->nb_prg];
298  p->id = programid;
299  p->nb_pids = 0;
300  p->pmt_found = 0;
301  ts->nb_prg++;
302 }
303 
304 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
305  unsigned int pid)
306 {
307  struct Program *p = get_program(ts, programid);
308  int i;
309  if (!p)
310  return;
311 
312  if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
313  return;
314 
315  for (i = 0; i < p->nb_pids; i++)
316  if (p->pids[i] == pid)
317  return;
318 
319  p->pids[p->nb_pids++] = pid;
320 }
321 
322 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
323 {
324  struct Program *p = get_program(ts, programid);
325  if (!p)
326  return;
327 
328  p->pmt_found = 1;
329 }
330 
331 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
332 {
333  int i;
334  for (i = 0; i < s->nb_programs; i++) {
335  if (s->programs[i]->id == programid) {
336  s->programs[i]->pcr_pid = pid;
337  break;
338  }
339  }
340 }
341 
342 /**
343  * @brief discard_pid() decides if the pid is to be discarded according
344  * to caller's programs selection
345  * @param ts : - TS context
346  * @param pid : - pid
347  * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
348  * 0 otherwise
349  */
350 static int discard_pid(MpegTSContext *ts, unsigned int pid)
351 {
352  int i, j, k;
353  int used = 0, discarded = 0;
354  struct Program *p;
355 
356  /* If none of the programs have .discard=AVDISCARD_ALL then there's
357  * no way we have to discard this packet */
358  for (k = 0; k < ts->stream->nb_programs; k++)
359  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
360  break;
361  if (k == ts->stream->nb_programs)
362  return 0;
363 
364  for (i = 0; i < ts->nb_prg; i++) {
365  p = &ts->prg[i];
366  for (j = 0; j < p->nb_pids; j++) {
367  if (p->pids[j] != pid)
368  continue;
369  // is program with id p->id set to be discarded?
370  for (k = 0; k < ts->stream->nb_programs; k++) {
371  if (ts->stream->programs[k]->id == p->id) {
372  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
373  discarded++;
374  else
375  used++;
376  }
377  }
378  }
379  }
380 
381  return !used && discarded;
382 }
383 
384 /**
385  * Assemble PES packets out of TS packets, and then call the "section_cb"
386  * function when they are complete.
387  */
389  const uint8_t *buf, int buf_size, int is_start)
390 {
391  MpegTSSectionFilter *tss = &tss1->u.section_filter;
392  int len;
393 
394  if (is_start) {
395  memcpy(tss->section_buf, buf, buf_size);
396  tss->section_index = buf_size;
397  tss->section_h_size = -1;
398  tss->end_of_section_reached = 0;
399  } else {
400  if (tss->end_of_section_reached)
401  return;
402  len = 4096 - tss->section_index;
403  if (buf_size < len)
404  len = buf_size;
405  memcpy(tss->section_buf + tss->section_index, buf, len);
406  tss->section_index += len;
407  }
408 
409  /* compute section length if possible */
410  if (tss->section_h_size == -1 && tss->section_index >= 3) {
411  len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
412  if (len > 4096)
413  return;
414  tss->section_h_size = len;
415  }
416 
417  if (tss->section_h_size != -1 &&
418  tss->section_index >= tss->section_h_size) {
419  int crc_valid = 1;
420  tss->end_of_section_reached = 1;
421 
422  if (tss->check_crc) {
423  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
424  if (tss->section_h_size >= 4)
425  tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
426 
427  if (crc_valid) {
428  ts->crc_validity[ tss1->pid ] = 100;
429  }else if (ts->crc_validity[ tss1->pid ] > -10) {
430  ts->crc_validity[ tss1->pid ]--;
431  }else
432  crc_valid = 2;
433  }
434  if (crc_valid) {
435  tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
436  if (crc_valid != 1)
437  tss->last_ver = -1;
438  }
439  }
440 }
441 
442 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
443  enum MpegTSFilterType type)
444 {
446 
447  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
448 
449  if (pid >= NB_PID_MAX || ts->pids[pid])
450  return NULL;
451  filter = av_mallocz(sizeof(MpegTSFilter));
452  if (!filter)
453  return NULL;
454  ts->pids[pid] = filter;
455 
456  filter->type = type;
457  filter->pid = pid;
458  filter->es_id = -1;
459  filter->last_cc = -1;
460  filter->last_pcr= -1;
461 
462  return filter;
463 }
464 
466  unsigned int pid,
467  SectionCallback *section_cb,
468  void *opaque,
469  int check_crc)
470 {
472  MpegTSSectionFilter *sec;
473 
474  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
475  return NULL;
476  sec = &filter->u.section_filter;
477  sec->section_cb = section_cb;
478  sec->opaque = opaque;
480  sec->check_crc = check_crc;
481  sec->last_ver = -1;
482 
483  if (!sec->section_buf) {
484  av_free(filter);
485  return NULL;
486  }
487  return filter;
488 }
489 
490 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
491  PESCallback *pes_cb,
492  void *opaque)
493 {
495  MpegTSPESFilter *pes;
496 
497  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
498  return NULL;
499 
500  pes = &filter->u.pes_filter;
501  pes->pes_cb = pes_cb;
502  pes->opaque = opaque;
503  return filter;
504 }
505 
506 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
507 {
508  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
509 }
510 
512 {
513  int pid;
514 
515  pid = filter->pid;
516  if (filter->type == MPEGTS_SECTION)
518  else if (filter->type == MPEGTS_PES) {
519  PESContext *pes = filter->u.pes_filter.opaque;
520  av_buffer_unref(&pes->buffer);
521  /* referenced private data will be freed later in
522  * avformat_close_input */
523  if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
524  av_freep(&filter->u.pes_filter.opaque);
525  }
526  }
527 
528  av_free(filter);
529  ts->pids[pid] = NULL;
530 }
531 
532 static int analyze(const uint8_t *buf, int size, int packet_size, int *index,
533  int probe)
534 {
535  int stat[TS_MAX_PACKET_SIZE];
536  int stat_all = 0;
537  int i;
538  int best_score = 0;
539 
540  memset(stat, 0, packet_size * sizeof(*stat));
541 
542  for (i = 0; i < size - 3; i++) {
543  if (buf[i] == 0x47 &&
544  (!probe || (!(buf[i + 1] & 0x80) && buf[i + 3] != 0x47))) {
545  int x = i % packet_size;
546  stat[x]++;
547  stat_all++;
548  if (stat[x] > best_score) {
549  best_score = stat[x];
550  if (index)
551  *index = x;
552  }
553  }
554  }
555 
556  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
557 }
558 
559 /* autodetect fec presence. Must have at least 1024 bytes */
560 static int get_packet_size(const uint8_t *buf, int size)
561 {
562  int score, fec_score, dvhs_score;
563 
564  if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
565  return AVERROR_INVALIDDATA;
566 
567  score = analyze(buf, size, TS_PACKET_SIZE, NULL, 0);
568  dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL, 0);
569  fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL, 0);
570  av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
571  score, dvhs_score, fec_score);
572 
573  if (score > fec_score && score > dvhs_score)
574  return TS_PACKET_SIZE;
575  else if (dvhs_score > score && dvhs_score > fec_score)
576  return TS_DVHS_PACKET_SIZE;
577  else if (score < fec_score && dvhs_score < fec_score)
578  return TS_FEC_PACKET_SIZE;
579  else
580  return AVERROR_INVALIDDATA;
581 }
582 
583 typedef struct SectionHeader {
585  uint16_t id;
589 } SectionHeader;
590 
592 {
593  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
594  return 1;
595 
596  tssf->last_ver = h->version;
597  tssf->last_crc = tssf->crc;
598 
599  return 0;
600 }
601 
602 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
603 {
604  const uint8_t *p;
605  int c;
606 
607  p = *pp;
608  if (p >= p_end)
609  return AVERROR_INVALIDDATA;
610  c = *p++;
611  *pp = p;
612  return c;
613 }
614 
615 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
616 {
617  const uint8_t *p;
618  int c;
619 
620  p = *pp;
621  if (1 >= p_end - p)
622  return AVERROR_INVALIDDATA;
623  c = AV_RB16(p);
624  p += 2;
625  *pp = p;
626  return c;
627 }
628 
629 /* read and allocate a DVB string preceded by its length */
630 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
631 {
632  int len;
633  const uint8_t *p;
634  char *str;
635 
636  p = *pp;
637  len = get8(&p, p_end);
638  if (len < 0)
639  return NULL;
640  if (len > p_end - p)
641  return NULL;
642  str = av_malloc(len + 1);
643  if (!str)
644  return NULL;
645  memcpy(str, p, len);
646  str[len] = '\0';
647  p += len;
648  *pp = p;
649  return str;
650 }
651 
653  const uint8_t **pp, const uint8_t *p_end)
654 {
655  int val;
656 
657  val = get8(pp, p_end);
658  if (val < 0)
659  return val;
660  h->tid = val;
661  *pp += 2;
662  val = get16(pp, p_end);
663  if (val < 0)
664  return val;
665  h->id = val;
666  val = get8(pp, p_end);
667  if (val < 0)
668  return val;
669  h->version = (val >> 1) & 0x1f;
670  val = get8(pp, p_end);
671  if (val < 0)
672  return val;
673  h->sec_num = val;
674  val = get8(pp, p_end);
675  if (val < 0)
676  return val;
677  h->last_sec_num = val;
678  return 0;
679 }
680 
681 typedef struct StreamType {
682  uint32_t stream_type;
685 } StreamType;
686 
687 static const StreamType ISO_types[] = {
694  /* Makito encoder sets stream type 0x11 for AAC,
695  * so auto-detect LOAS/LATM instead of hardcoding it. */
696 #if !CONFIG_LOAS_DEMUXER
697  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
698 #endif
705  { 0 },
706 };
707 
708 static const StreamType HDMV_types[] = {
714  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
715  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
716  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
717  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
719  { 0 },
720 };
721 
722 /* ATSC ? */
723 static const StreamType MISC_types[] = {
726  { 0 },
727 };
728 
729 static const StreamType REGD_types[] = {
730  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
731  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
732  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
733  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
734  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
735  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
736  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
737  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
738  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
739  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
740  { 0 },
741 };
742 
743 static const StreamType METADATA_types[] = {
744  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
745  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
746  { 0 },
747 };
748 
749 /* descriptor present */
750 static const StreamType DESC_types[] = {
751  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
752  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
755  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
756  { 0 },
757 };
758 
760  uint32_t stream_type,
761  const StreamType *types)
762 {
763  if (avcodec_is_open(st->codec)) {
764  av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
765  return;
766  }
767 
768  for (; types->stream_type; types++)
769  if (stream_type == types->stream_type) {
770  st->codec->codec_type = types->codec_type;
771  st->codec->codec_id = types->codec_id;
772  st->request_probe = 0;
773  return;
774  }
775 }
776 
778  uint32_t stream_type, uint32_t prog_reg_desc)
779 {
780  int old_codec_type = st->codec->codec_type;
781  int old_codec_id = st->codec->codec_id;
782 
783  if (avcodec_is_open(st->codec)) {
784  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
785  return 0;
786  }
787 
788  avpriv_set_pts_info(st, 33, 1, 90000);
789  st->priv_data = pes;
793  pes->st = st;
794  pes->stream_type = stream_type;
795 
796  av_log(pes->stream, AV_LOG_DEBUG,
797  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
798  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
799 
800  st->codec->codec_tag = pes->stream_type;
801 
802  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
803  if ((prog_reg_desc == AV_RL32("HDMV") ||
804  prog_reg_desc == AV_RL32("HDPR")) &&
805  st->codec->codec_id == AV_CODEC_ID_NONE) {
806  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
807  if (pes->stream_type == 0x83) {
808  // HDMV TrueHD streams also contain an AC3 coded version of the
809  // audio track - add a second stream for this
810  AVStream *sub_st;
811  // priv_data cannot be shared between streams
812  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
813  if (!sub_pes)
814  return AVERROR(ENOMEM);
815  memcpy(sub_pes, pes, sizeof(*sub_pes));
816 
817  sub_st = avformat_new_stream(pes->stream, NULL);
818  if (!sub_st) {
819  av_free(sub_pes);
820  return AVERROR(ENOMEM);
821  }
822 
823  sub_st->id = pes->pid;
824  avpriv_set_pts_info(sub_st, 33, 1, 90000);
825  sub_st->priv_data = sub_pes;
827  sub_st->codec->codec_id = AV_CODEC_ID_AC3;
829  sub_pes->sub_st = pes->sub_st = sub_st;
830  }
831  }
832  if (st->codec->codec_id == AV_CODEC_ID_NONE)
833  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
834  if (st->codec->codec_id == AV_CODEC_ID_NONE) {
835  st->codec->codec_id = old_codec_id;
836  st->codec->codec_type = old_codec_type;
837  }
838 
839  return 0;
840 }
841 
843 {
844  pes->pts = AV_NOPTS_VALUE;
845  pes->dts = AV_NOPTS_VALUE;
846  pes->data_index = 0;
847  pes->flags = 0;
848  av_buffer_unref(&pes->buffer);
849 }
850 
852 {
853  av_init_packet(pkt);
854 
855  pkt->buf = pes->buffer;
856  pkt->data = pes->buffer->data;
857  pkt->size = pes->data_index;
858 
859  if (pes->total_size != MAX_PES_PAYLOAD &&
860  pes->pes_header_size + pes->data_index != pes->total_size +
861  PES_START_SIZE) {
862  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
863  pes->flags |= AV_PKT_FLAG_CORRUPT;
864  }
865  memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
866 
867  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
868  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
869  pkt->stream_index = pes->sub_st->index;
870  else
871  pkt->stream_index = pes->st->index;
872  pkt->pts = pes->pts;
873  pkt->dts = pes->dts;
874  /* store position of first TS packet of this PES packet */
875  pkt->pos = pes->ts_packet_pos;
876  pkt->flags = pes->flags;
877 
878  pes->buffer = NULL;
880 }
881 
882 static uint64_t get_ts64(GetBitContext *gb, int bits)
883 {
884  if (get_bits_left(gb) < bits)
885  return AV_NOPTS_VALUE;
886  return get_bits64(gb, bits);
887 }
888 
890  const uint8_t *buf, int buf_size)
891 {
892  GetBitContext gb;
893  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
894  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
895  int dts_flag = -1, cts_flag = -1;
896  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
897  uint8_t buf_padded[128 + FF_INPUT_BUFFER_PADDING_SIZE];
898  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - FF_INPUT_BUFFER_PADDING_SIZE);
899 
900  memcpy(buf_padded, buf, buf_padded_size);
901 
902  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
903 
904  if (sl->use_au_start)
905  au_start_flag = get_bits1(&gb);
906  if (sl->use_au_end)
907  au_end_flag = get_bits1(&gb);
908  if (!sl->use_au_start && !sl->use_au_end)
909  au_start_flag = au_end_flag = 1;
910  if (sl->ocr_len > 0)
911  ocr_flag = get_bits1(&gb);
912  if (sl->use_idle)
913  idle_flag = get_bits1(&gb);
914  if (sl->use_padding)
915  padding_flag = get_bits1(&gb);
916  if (padding_flag)
917  padding_bits = get_bits(&gb, 3);
918 
919  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
920  if (sl->packet_seq_num_len)
922  if (sl->degr_prior_len)
923  if (get_bits1(&gb))
924  skip_bits(&gb, sl->degr_prior_len);
925  if (ocr_flag)
926  skip_bits_long(&gb, sl->ocr_len);
927  if (au_start_flag) {
928  if (sl->use_rand_acc_pt)
929  get_bits1(&gb);
930  if (sl->au_seq_num_len > 0)
931  skip_bits_long(&gb, sl->au_seq_num_len);
932  if (sl->use_timestamps) {
933  dts_flag = get_bits1(&gb);
934  cts_flag = get_bits1(&gb);
935  }
936  }
937  if (sl->inst_bitrate_len)
938  inst_bitrate_flag = get_bits1(&gb);
939  if (dts_flag == 1)
940  dts = get_ts64(&gb, sl->timestamp_len);
941  if (cts_flag == 1)
942  cts = get_ts64(&gb, sl->timestamp_len);
943  if (sl->au_len > 0)
944  skip_bits_long(&gb, sl->au_len);
945  if (inst_bitrate_flag)
947  }
948 
949  if (dts != AV_NOPTS_VALUE)
950  pes->dts = dts;
951  if (cts != AV_NOPTS_VALUE)
952  pes->pts = cts;
953 
954  if (sl->timestamp_len && sl->timestamp_res)
956 
957  return (get_bits_count(&gb) + 7) >> 3;
958 }
959 
960 /* return non zero if a packet could be constructed */
962  const uint8_t *buf, int buf_size, int is_start,
963  int64_t pos)
964 {
965  PESContext *pes = filter->u.pes_filter.opaque;
966  MpegTSContext *ts = pes->ts;
967  const uint8_t *p;
968  int len, code;
969 
970  if (!ts->pkt)
971  return 0;
972 
973  if (is_start) {
974  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
975  new_pes_packet(pes, ts->pkt);
976  ts->stop_parse = 1;
977  } else {
979  }
980  pes->state = MPEGTS_HEADER;
981  pes->ts_packet_pos = pos;
982  }
983  p = buf;
984  while (buf_size > 0) {
985  switch (pes->state) {
986  case MPEGTS_HEADER:
987  len = PES_START_SIZE - pes->data_index;
988  if (len > buf_size)
989  len = buf_size;
990  memcpy(pes->header + pes->data_index, p, len);
991  pes->data_index += len;
992  p += len;
993  buf_size -= len;
994  if (pes->data_index == PES_START_SIZE) {
995  /* we got all the PES or section header. We can now
996  * decide */
997  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
998  pes->header[2] == 0x01) {
999  /* it must be an mpeg2 PES stream */
1000  code = pes->header[3] | 0x100;
1001  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1002  code);
1003 
1004  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1005  (!pes->sub_st ||
1006  pes->sub_st->discard == AVDISCARD_ALL)) ||
1007  code == 0x1be) /* padding_stream */
1008  goto skip;
1009 
1010  /* stream not present in PMT */
1011  if (!pes->st) {
1012  if (ts->skip_changes)
1013  goto skip;
1014 
1015  pes->st = avformat_new_stream(ts->stream, NULL);
1016  if (!pes->st)
1017  return AVERROR(ENOMEM);
1018  pes->st->id = pes->pid;
1019  mpegts_set_stream_info(pes->st, pes, 0, 0);
1020  }
1021 
1022  pes->total_size = AV_RB16(pes->header + 4);
1023  /* NOTE: a zero total size means the PES size is
1024  * unbounded */
1025  if (!pes->total_size)
1026  pes->total_size = MAX_PES_PAYLOAD;
1027 
1028  /* allocate pes buffer */
1029  pes->buffer = av_buffer_alloc(pes->total_size +
1031  if (!pes->buffer)
1032  return AVERROR(ENOMEM);
1033 
1034  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1035  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1036  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1037  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1038  pes->state = MPEGTS_PESHEADER;
1039  if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1040  av_log(pes->stream, AV_LOG_TRACE,
1041  "pid=%x stream_type=%x probing\n",
1042  pes->pid,
1043  pes->stream_type);
1044  pes->st->request_probe = 1;
1045  }
1046  } else {
1047  pes->state = MPEGTS_PAYLOAD;
1048  pes->data_index = 0;
1049  }
1050  } else {
1051  /* otherwise, it should be a table */
1052  /* skip packet */
1053 skip:
1054  pes->state = MPEGTS_SKIP;
1055  continue;
1056  }
1057  }
1058  break;
1059  /**********************************************/
1060  /* PES packing parsing */
1061  case MPEGTS_PESHEADER:
1062  len = PES_HEADER_SIZE - pes->data_index;
1063  if (len < 0)
1064  return AVERROR_INVALIDDATA;
1065  if (len > buf_size)
1066  len = buf_size;
1067  memcpy(pes->header + pes->data_index, p, len);
1068  pes->data_index += len;
1069  p += len;
1070  buf_size -= len;
1071  if (pes->data_index == PES_HEADER_SIZE) {
1072  pes->pes_header_size = pes->header[8] + 9;
1074  }
1075  break;
1076  case MPEGTS_PESHEADER_FILL:
1077  len = pes->pes_header_size - pes->data_index;
1078  if (len < 0)
1079  return AVERROR_INVALIDDATA;
1080  if (len > buf_size)
1081  len = buf_size;
1082  memcpy(pes->header + pes->data_index, p, len);
1083  pes->data_index += len;
1084  p += len;
1085  buf_size -= len;
1086  if (pes->data_index == pes->pes_header_size) {
1087  const uint8_t *r;
1088  unsigned int flags, pes_ext, skip;
1089 
1090  flags = pes->header[7];
1091  r = pes->header + 9;
1092  pes->pts = AV_NOPTS_VALUE;
1093  pes->dts = AV_NOPTS_VALUE;
1094  if ((flags & 0xc0) == 0x80) {
1095  pes->dts = pes->pts = ff_parse_pes_pts(r);
1096  r += 5;
1097  } else if ((flags & 0xc0) == 0xc0) {
1098  pes->pts = ff_parse_pes_pts(r);
1099  r += 5;
1100  pes->dts = ff_parse_pes_pts(r);
1101  r += 5;
1102  }
1103  pes->extended_stream_id = -1;
1104  if (flags & 0x01) { /* PES extension */
1105  pes_ext = *r++;
1106  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1107  skip = (pes_ext >> 4) & 0xb;
1108  skip += skip & 0x9;
1109  r += skip;
1110  if ((pes_ext & 0x41) == 0x01 &&
1111  (r + 2) <= (pes->header + pes->pes_header_size)) {
1112  /* PES extension 2 */
1113  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1114  pes->extended_stream_id = r[1];
1115  }
1116  }
1117 
1118  /* we got the full header. We parse it and get the payload */
1119  pes->state = MPEGTS_PAYLOAD;
1120  pes->data_index = 0;
1121  if (pes->stream_type == 0x12 && buf_size > 0) {
1122  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1123  buf_size);
1124  pes->pes_header_size += sl_header_bytes;
1125  p += sl_header_bytes;
1126  buf_size -= sl_header_bytes;
1127  }
1128  if (pes->stream_type == 0x15 && buf_size >= 5) {
1129  /* skip metadata access unit header */
1130  pes->pes_header_size += 5;
1131  p += 5;
1132  buf_size -= 5;
1133  }
1134  if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1135  AVProgram *p = NULL;
1136  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1137  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1138  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1139  if (f) {
1140  AVStream *st = NULL;
1141  if (f->type == MPEGTS_PES) {
1142  PESContext *pcrpes = f->u.pes_filter.opaque;
1143  if (pcrpes)
1144  st = pcrpes->st;
1145  } else if (f->type == MPEGTS_PCR) {
1146  int i;
1147  for (i = 0; i < p->nb_stream_indexes; i++) {
1148  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1149  if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1150  st = pst;
1151  }
1152  }
1153  if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1154  // teletext packets do not always have correct timestamps,
1155  // the standard says they should be handled after 40.6 ms at most,
1156  // and the pcr error to this packet should be no more than 100 ms.
1157  // TODO: we should interpolate the PCR, not just use the last one
1158  int64_t pcr = f->last_pcr / 300;
1161  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1162  pes->pts = pes->dts = pcr;
1163  } else if (pes->dts > pcr + 3654 + 9000) {
1164  pes->pts = pes->dts = pcr + 3654 + 9000;
1165  }
1166  break;
1167  }
1168  }
1169  }
1170  }
1171  }
1172  }
1173  break;
1174  case MPEGTS_PAYLOAD:
1175  if (pes->buffer) {
1176  if (pes->data_index > 0 &&
1177  pes->data_index + buf_size > pes->total_size) {
1178  new_pes_packet(pes, ts->pkt);
1179  pes->total_size = MAX_PES_PAYLOAD;
1180  pes->buffer = av_buffer_alloc(pes->total_size +
1182  if (!pes->buffer)
1183  return AVERROR(ENOMEM);
1184  ts->stop_parse = 1;
1185  } else if (pes->data_index == 0 &&
1186  buf_size > pes->total_size) {
1187  // pes packet size is < ts size packet and pes data is padded with 0xff
1188  // not sure if this is legal in ts but see issue #2392
1189  buf_size = pes->total_size;
1190  }
1191  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1192  pes->data_index += buf_size;
1193  /* emit complete packets with known packet size
1194  * decreases demuxer delay for infrequent packets like subtitles from
1195  * a couple of seconds to milliseconds for properly muxed files.
1196  * total_size is the number of bytes following pes_packet_length
1197  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1198  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1199  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1200  ts->stop_parse = 1;
1201  new_pes_packet(pes, ts->pkt);
1202  }
1203  }
1204  buf_size = 0;
1205  break;
1206  case MPEGTS_SKIP:
1207  buf_size = 0;
1208  break;
1209  }
1210  }
1211 
1212  return 0;
1213 }
1214 
1215 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1216 {
1217  MpegTSFilter *tss;
1218  PESContext *pes;
1219 
1220  /* if no pid found, then add a pid context */
1221  pes = av_mallocz(sizeof(PESContext));
1222  if (!pes)
1223  return 0;
1224  pes->ts = ts;
1225  pes->stream = ts->stream;
1226  pes->pid = pid;
1227  pes->pcr_pid = pcr_pid;
1228  pes->state = MPEGTS_SKIP;
1229  pes->pts = AV_NOPTS_VALUE;
1230  pes->dts = AV_NOPTS_VALUE;
1231  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1232  if (!tss) {
1233  av_free(pes);
1234  return 0;
1235  }
1236  return pes;
1237 }
1238 
1239 #define MAX_LEVEL 4
1240 typedef struct MP4DescrParseContext {
1247  int level;
1250 
1252  const uint8_t *buf, unsigned size,
1253  Mp4Descr *descr, int max_descr_count)
1254 {
1255  int ret;
1256  if (size > (1 << 30))
1257  return AVERROR_INVALIDDATA;
1258 
1259  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1260  NULL, NULL, NULL, NULL)) < 0)
1261  return ret;
1262 
1263  d->s = s;
1264  d->level = 0;
1265  d->descr_count = 0;
1266  d->descr = descr;
1267  d->active_descr = NULL;
1268  d->max_descr_count = max_descr_count;
1269 
1270  return 0;
1271 }
1272 
1273 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1274 {
1275  int64_t new_off = avio_tell(pb);
1276  (*len) -= new_off - *off;
1277  *off = new_off;
1278 }
1279 
1280 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1281  int target_tag);
1282 
1283 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1284 {
1285  while (len > 0) {
1286  int ret = parse_mp4_descr(d, off, len, 0);
1287  if (ret < 0)
1288  return ret;
1289  update_offsets(&d->pb, &off, &len);
1290  }
1291  return 0;
1292 }
1293 
1294 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1295 {
1296  avio_rb16(&d->pb); // ID
1297  avio_r8(&d->pb);
1298  avio_r8(&d->pb);
1299  avio_r8(&d->pb);
1300  avio_r8(&d->pb);
1301  avio_r8(&d->pb);
1302  update_offsets(&d->pb, &off, &len);
1303  return parse_mp4_descr_arr(d, off, len);
1304 }
1305 
1306 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1307 {
1308  int id_flags;
1309  if (len < 2)
1310  return 0;
1311  id_flags = avio_rb16(&d->pb);
1312  if (!(id_flags & 0x0020)) { // URL_Flag
1313  update_offsets(&d->pb, &off, &len);
1314  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1315  } else {
1316  return 0;
1317  }
1318 }
1319 
1320 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1321 {
1322  int es_id = 0;
1323  if (d->descr_count >= d->max_descr_count)
1324  return AVERROR_INVALIDDATA;
1325  ff_mp4_parse_es_descr(&d->pb, &es_id);
1326  d->active_descr = d->descr + (d->descr_count++);
1327 
1328  d->active_descr->es_id = es_id;
1329  update_offsets(&d->pb, &off, &len);
1330  parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1331  update_offsets(&d->pb, &off, &len);
1332  if (len > 0)
1333  parse_mp4_descr(d, off, len, MP4SLDescrTag);
1334  d->active_descr = NULL;
1335  return 0;
1336 }
1337 
1339  int len)
1340 {
1341  Mp4Descr *descr = d->active_descr;
1342  if (!descr)
1343  return AVERROR_INVALIDDATA;
1345  if (!descr->dec_config_descr)
1346  return AVERROR(ENOMEM);
1347  descr->dec_config_descr_len = len;
1348  avio_read(&d->pb, descr->dec_config_descr, len);
1349  return 0;
1350 }
1351 
1352 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1353 {
1354  Mp4Descr *descr = d->active_descr;
1355  int predefined;
1356  if (!descr)
1357  return AVERROR_INVALIDDATA;
1358 
1359  predefined = avio_r8(&d->pb);
1360  if (!predefined) {
1361  int lengths;
1362  int flags = avio_r8(&d->pb);
1363  descr->sl.use_au_start = !!(flags & 0x80);
1364  descr->sl.use_au_end = !!(flags & 0x40);
1365  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1366  descr->sl.use_padding = !!(flags & 0x08);
1367  descr->sl.use_timestamps = !!(flags & 0x04);
1368  descr->sl.use_idle = !!(flags & 0x02);
1369  descr->sl.timestamp_res = avio_rb32(&d->pb);
1370  avio_rb32(&d->pb);
1371  descr->sl.timestamp_len = avio_r8(&d->pb);
1372  if (descr->sl.timestamp_len > 64) {
1373  avpriv_request_sample(NULL, "timestamp_len > 64");
1374  descr->sl.timestamp_len = 64;
1375  return AVERROR_PATCHWELCOME;
1376  }
1377  descr->sl.ocr_len = avio_r8(&d->pb);
1378  descr->sl.au_len = avio_r8(&d->pb);
1379  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1380  lengths = avio_rb16(&d->pb);
1381  descr->sl.degr_prior_len = lengths >> 12;
1382  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1383  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1384  } else if (!d->predefined_SLConfigDescriptor_seen){
1385  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1387  }
1388  return 0;
1389 }
1390 
1391 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1392  int target_tag)
1393 {
1394  int tag;
1395  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1396  update_offsets(&d->pb, &off, &len);
1397  if (len < 0 || len1 > len || len1 <= 0) {
1398  av_log(d->s, AV_LOG_ERROR,
1399  "Tag %x length violation new length %d bytes remaining %d\n",
1400  tag, len1, len);
1401  return AVERROR_INVALIDDATA;
1402  }
1403 
1404  if (d->level++ >= MAX_LEVEL) {
1405  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1406  goto done;
1407  }
1408 
1409  if (target_tag && tag != target_tag) {
1410  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1411  target_tag);
1412  goto done;
1413  }
1414 
1415  switch (tag) {
1416  case MP4IODescrTag:
1417  parse_MP4IODescrTag(d, off, len1);
1418  break;
1419  case MP4ODescrTag:
1420  parse_MP4ODescrTag(d, off, len1);
1421  break;
1422  case MP4ESDescrTag:
1423  parse_MP4ESDescrTag(d, off, len1);
1424  break;
1425  case MP4DecConfigDescrTag:
1426  parse_MP4DecConfigDescrTag(d, off, len1);
1427  break;
1428  case MP4SLDescrTag:
1429  parse_MP4SLDescrTag(d, off, len1);
1430  break;
1431  }
1432 
1433 
1434 done:
1435  d->level--;
1436  avio_seek(&d->pb, off + len1, SEEK_SET);
1437  return 0;
1438 }
1439 
1440 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1441  Mp4Descr *descr, int *descr_count, int max_descr_count)
1442 {
1444  int ret;
1445 
1446  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1447  if (ret < 0)
1448  return ret;
1449 
1450  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1451 
1452  *descr_count = d.descr_count;
1453  return ret;
1454 }
1455 
1456 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1457  Mp4Descr *descr, int *descr_count, int max_descr_count)
1458 {
1460  int ret;
1461 
1462  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1463  if (ret < 0)
1464  return ret;
1465 
1466  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1467 
1468  *descr_count = d.descr_count;
1469  return ret;
1470 }
1471 
1473  int section_len)
1474 {
1475  MpegTSContext *ts = filter->u.section_filter.opaque;
1476  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1477  SectionHeader h;
1478  const uint8_t *p, *p_end;
1479  AVIOContext pb;
1480  int mp4_descr_count = 0;
1481  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1482  int i, pid;
1483  AVFormatContext *s = ts->stream;
1484 
1485  p_end = section + section_len - 4;
1486  p = section;
1487  if (parse_section_header(&h, &p, p_end) < 0)
1488  return;
1489  if (h.tid != M4OD_TID)
1490  return;
1491  if (skip_identical(&h, tssf))
1492  return;
1493 
1494  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1496 
1497  for (pid = 0; pid < NB_PID_MAX; pid++) {
1498  if (!ts->pids[pid])
1499  continue;
1500  for (i = 0; i < mp4_descr_count; i++) {
1501  PESContext *pes;
1502  AVStream *st;
1503  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1504  continue;
1505  if (ts->pids[pid]->type != MPEGTS_PES) {
1506  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1507  continue;
1508  }
1509  pes = ts->pids[pid]->u.pes_filter.opaque;
1510  st = pes->st;
1511  if (!st)
1512  continue;
1513 
1514  pes->sl = mp4_descr[i].sl;
1515 
1516  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1517  mp4_descr[i].dec_config_descr_len, 0,
1518  NULL, NULL, NULL, NULL);
1519  ff_mp4_read_dec_config_descr(s, st, &pb);
1520  if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1521  st->codec->extradata_size > 0)
1522  st->need_parsing = 0;
1523  if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1524  st->codec->extradata_size > 0)
1525  st->need_parsing = 0;
1526 
1527  if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1528  // do nothing
1529  } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO)
1531  else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
1533  else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
1535  }
1536  }
1537  for (i = 0; i < mp4_descr_count; i++)
1538  av_free(mp4_descr[i].dec_config_descr);
1539 }
1540 
1542  1, 0, 1, 1, 2, 2, 2, 3, 3
1543 };
1544 
1545 static const uint8_t opus_stream_cnt[9] = {
1546  1, 1, 1, 2, 2, 3, 4, 4, 5,
1547 };
1548 
1549 static const uint8_t opus_channel_map[8][8] = {
1550  { 0 },
1551  { 0,1 },
1552  { 0,2,1 },
1553  { 0,1,2,3 },
1554  { 0,4,1,2,3 },
1555  { 0,4,1,2,3,5 },
1556  { 0,4,1,2,3,5,6 },
1557  { 0,6,1,2,3,4,5,7 },
1558 };
1559 
1561  const uint8_t **pp, const uint8_t *desc_list_end,
1562  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1563  MpegTSContext *ts)
1564 {
1565  const uint8_t *desc_end;
1566  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1567  char language[252];
1568  int i;
1569 
1570  desc_tag = get8(pp, desc_list_end);
1571  if (desc_tag < 0)
1572  return AVERROR_INVALIDDATA;
1573  desc_len = get8(pp, desc_list_end);
1574  if (desc_len < 0)
1575  return AVERROR_INVALIDDATA;
1576  desc_end = *pp + desc_len;
1577  if (desc_end > desc_list_end)
1578  return AVERROR_INVALIDDATA;
1579 
1580  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1581 
1582  if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1583  stream_type == STREAM_TYPE_PRIVATE_DATA)
1584  mpegts_find_stream_type(st, desc_tag, DESC_types);
1585 
1586  switch (desc_tag) {
1587  case 0x1E: /* SL descriptor */
1588  desc_es_id = get16(pp, desc_end);
1589  if (desc_es_id < 0)
1590  break;
1591  if (ts && ts->pids[pid])
1592  ts->pids[pid]->es_id = desc_es_id;
1593  for (i = 0; i < mp4_descr_count; i++)
1594  if (mp4_descr[i].dec_config_descr_len &&
1595  mp4_descr[i].es_id == desc_es_id) {
1596  AVIOContext pb;
1597  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1598  mp4_descr[i].dec_config_descr_len, 0,
1599  NULL, NULL, NULL, NULL);
1600  ff_mp4_read_dec_config_descr(fc, st, &pb);
1601  if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1602  st->codec->extradata_size > 0)
1603  st->need_parsing = 0;
1605  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1606  }
1607  break;
1608  case 0x1F: /* FMC descriptor */
1609  if (get16(pp, desc_end) < 0)
1610  break;
1611  if (mp4_descr_count > 0 &&
1612  (st->codec->codec_id == AV_CODEC_ID_AAC_LATM ||
1613  (st->request_probe == 0 && st->codec->codec_id == AV_CODEC_ID_NONE) ||
1614  st->request_probe > 0) &&
1615  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1616  AVIOContext pb;
1617  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1618  mp4_descr->dec_config_descr_len, 0,
1619  NULL, NULL, NULL, NULL);
1620  ff_mp4_read_dec_config_descr(fc, st, &pb);
1621  if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1622  st->codec->extradata_size > 0) {
1623  st->request_probe = st->need_parsing = 0;
1625  }
1626  }
1627  break;
1628  case 0x56: /* DVB teletext descriptor */
1629  {
1630  uint8_t *extradata = NULL;
1631  int language_count = desc_len / 5;
1632 
1633  if (desc_len > 0 && desc_len % 5 != 0)
1634  return AVERROR_INVALIDDATA;
1635 
1636  if (language_count > 0) {
1637  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1638  if (language_count > sizeof(language) / 4) {
1639  language_count = sizeof(language) / 4;
1640  }
1641 
1642  if (st->codec->extradata == NULL) {
1643  if (ff_alloc_extradata(st->codec, language_count * 2)) {
1644  return AVERROR(ENOMEM);
1645  }
1646  }
1647 
1648  if (st->codec->extradata_size < language_count * 2)
1649  return AVERROR_INVALIDDATA;
1650 
1651  extradata = st->codec->extradata;
1652 
1653  for (i = 0; i < language_count; i++) {
1654  language[i * 4 + 0] = get8(pp, desc_end);
1655  language[i * 4 + 1] = get8(pp, desc_end);
1656  language[i * 4 + 2] = get8(pp, desc_end);
1657  language[i * 4 + 3] = ',';
1658 
1659  memcpy(extradata, *pp, 2);
1660  extradata += 2;
1661 
1662  *pp += 2;
1663  }
1664 
1665  language[i * 4 - 1] = 0;
1666  av_dict_set(&st->metadata, "language", language, 0);
1667  }
1668  }
1669  break;
1670  case 0x59: /* subtitling descriptor */
1671  {
1672  /* 8 bytes per DVB subtitle substream data:
1673  * ISO_639_language_code (3 bytes),
1674  * subtitling_type (1 byte),
1675  * composition_page_id (2 bytes),
1676  * ancillary_page_id (2 bytes) */
1677  int language_count = desc_len / 8;
1678 
1679  if (desc_len > 0 && desc_len % 8 != 0)
1680  return AVERROR_INVALIDDATA;
1681 
1682  if (language_count > 1) {
1683  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1684  }
1685 
1686  if (language_count > 0) {
1687  uint8_t *extradata;
1688 
1689  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1690  if (language_count > sizeof(language) / 4) {
1691  language_count = sizeof(language) / 4;
1692  }
1693 
1694  if (st->codec->extradata == NULL) {
1695  if (ff_alloc_extradata(st->codec, language_count * 5)) {
1696  return AVERROR(ENOMEM);
1697  }
1698  }
1699 
1700  if (st->codec->extradata_size < language_count * 5)
1701  return AVERROR_INVALIDDATA;
1702 
1703  extradata = st->codec->extradata;
1704 
1705  for (i = 0; i < language_count; i++) {
1706  language[i * 4 + 0] = get8(pp, desc_end);
1707  language[i * 4 + 1] = get8(pp, desc_end);
1708  language[i * 4 + 2] = get8(pp, desc_end);
1709  language[i * 4 + 3] = ',';
1710 
1711  /* hearing impaired subtitles detection using subtitling_type */
1712  switch (*pp[0]) {
1713  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1714  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1715  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1716  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1717  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1718  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1720  break;
1721  }
1722 
1723  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1724  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1725  extradata += 5;
1726 
1727  *pp += 4;
1728  }
1729 
1730  language[i * 4 - 1] = 0;
1731  av_dict_set(&st->metadata, "language", language, 0);
1732  }
1733  }
1734  break;
1735  case 0x0a: /* ISO 639 language descriptor */
1736  for (i = 0; i + 4 <= desc_len; i += 4) {
1737  language[i + 0] = get8(pp, desc_end);
1738  language[i + 1] = get8(pp, desc_end);
1739  language[i + 2] = get8(pp, desc_end);
1740  language[i + 3] = ',';
1741  switch (get8(pp, desc_end)) {
1742  case 0x01:
1744  break;
1745  case 0x02:
1747  break;
1748  case 0x03:
1750  break;
1751  }
1752  }
1753  if (i && language[0]) {
1754  language[i - 1] = 0;
1755  av_dict_set(&st->metadata, "language", language, 0);
1756  }
1757  break;
1758  case 0x05: /* registration descriptor */
1759  st->codec->codec_tag = bytestream_get_le32(pp);
1760  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1761  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1762  mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1763  break;
1764  case 0x52: /* stream identifier descriptor */
1765  st->stream_identifier = 1 + get8(pp, desc_end);
1766  break;
1767  case 0x26: /* metadata descriptor */
1768  if (get16(pp, desc_end) == 0xFFFF)
1769  *pp += 4;
1770  if (get8(pp, desc_end) == 0xFF) {
1771  st->codec->codec_tag = bytestream_get_le32(pp);
1772  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1773  mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
1774  }
1775  break;
1776  case 0x7f: /* DVB extension descriptor */
1777  ext_desc_tag = get8(pp, desc_end);
1778  if (ext_desc_tag < 0)
1779  return AVERROR_INVALIDDATA;
1780  if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1781  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1782  if (!st->codec->extradata) {
1785  if (!st->codec->extradata)
1786  return AVERROR(ENOMEM);
1787 
1790 
1791  channel_config_code = get8(pp, desc_end);
1792  if (channel_config_code < 0)
1793  return AVERROR_INVALIDDATA;
1794  if (channel_config_code <= 0x8) {
1795  st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1796  st->codec->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1797  st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
1798  st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1799  memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1800  } else {
1801  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1802  }
1804  }
1805  }
1806  break;
1807  default:
1808  break;
1809  }
1810  *pp = desc_end;
1811  return 0;
1812 }
1813 
1814 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1815 {
1816  MpegTSContext *ts = filter->u.section_filter.opaque;
1817  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1818  SectionHeader h1, *h = &h1;
1819  PESContext *pes;
1820  AVStream *st;
1821  const uint8_t *p, *p_end, *desc_list_end;
1822  int program_info_length, pcr_pid, pid, stream_type;
1823  int desc_list_len;
1824  uint32_t prog_reg_desc = 0; /* registration descriptor */
1825 
1826  int mp4_descr_count = 0;
1827  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1828  int i;
1829 
1830  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1831  hex_dump_debug(ts->stream, section, section_len);
1832 
1833  p_end = section + section_len - 4;
1834  p = section;
1835  if (parse_section_header(h, &p, p_end) < 0)
1836  return;
1837  if (skip_identical(h, tssf))
1838  return;
1839 
1840  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1841  h->id, h->sec_num, h->last_sec_num, h->version);
1842 
1843  if (h->tid != PMT_TID)
1844  return;
1845  if (!ts->scan_all_pmts && ts->skip_changes)
1846  return;
1847 
1848  if (!ts->skip_clear)
1849  clear_program(ts, h->id);
1850 
1851  pcr_pid = get16(&p, p_end);
1852  if (pcr_pid < 0)
1853  return;
1854  pcr_pid &= 0x1fff;
1855  add_pid_to_pmt(ts, h->id, pcr_pid);
1856  set_pcr_pid(ts->stream, h->id, pcr_pid);
1857 
1858  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1859 
1860  program_info_length = get16(&p, p_end);
1861  if (program_info_length < 0)
1862  return;
1863  program_info_length &= 0xfff;
1864  while (program_info_length >= 2) {
1865  uint8_t tag, len;
1866  tag = get8(&p, p_end);
1867  len = get8(&p, p_end);
1868 
1869  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1870 
1871  if (len > program_info_length - 2)
1872  // something else is broken, exit the program_descriptors_loop
1873  break;
1874  program_info_length -= len + 2;
1875  if (tag == 0x1d) { // IOD descriptor
1876  get8(&p, p_end); // scope
1877  get8(&p, p_end); // label
1878  len -= 2;
1879  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1880  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1881  } else if (tag == 0x05 && len >= 4) { // registration descriptor
1882  prog_reg_desc = bytestream_get_le32(&p);
1883  len -= 4;
1884  }
1885  p += len;
1886  }
1887  p += program_info_length;
1888  if (p >= p_end)
1889  goto out;
1890 
1891  // stop parsing after pmt, we found header
1892  if (!ts->stream->nb_streams)
1893  ts->stop_parse = 2;
1894 
1895  set_pmt_found(ts, h->id);
1896 
1897 
1898  for (;;) {
1899  st = 0;
1900  pes = NULL;
1901  stream_type = get8(&p, p_end);
1902  if (stream_type < 0)
1903  break;
1904  pid = get16(&p, p_end);
1905  if (pid < 0)
1906  goto out;
1907  pid &= 0x1fff;
1908  if (pid == ts->current_pid)
1909  goto out;
1910 
1911  /* now create stream */
1912  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1913  pes = ts->pids[pid]->u.pes_filter.opaque;
1914  if (!pes->st) {
1915  pes->st = avformat_new_stream(pes->stream, NULL);
1916  if (!pes->st)
1917  goto out;
1918  pes->st->id = pes->pid;
1919  }
1920  st = pes->st;
1921  } else if (stream_type != 0x13) {
1922  if (ts->pids[pid])
1923  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1924  pes = add_pes_stream(ts, pid, pcr_pid);
1925  if (pes) {
1926  st = avformat_new_stream(pes->stream, NULL);
1927  if (!st)
1928  goto out;
1929  st->id = pes->pid;
1930  }
1931  } else {
1932  int idx = ff_find_stream_index(ts->stream, pid);
1933  if (idx >= 0) {
1934  st = ts->stream->streams[idx];
1935  } else {
1936  st = avformat_new_stream(ts->stream, NULL);
1937  if (!st)
1938  goto out;
1939  st->id = pid;
1941  }
1942  }
1943 
1944  if (!st)
1945  goto out;
1946 
1947  if (pes && !pes->stream_type)
1948  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1949 
1950  add_pid_to_pmt(ts, h->id, pid);
1951 
1953 
1954  desc_list_len = get16(&p, p_end);
1955  if (desc_list_len < 0)
1956  goto out;
1957  desc_list_len &= 0xfff;
1958  desc_list_end = p + desc_list_len;
1959  if (desc_list_end > p_end)
1960  goto out;
1961  for (;;) {
1962  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1963  desc_list_end, mp4_descr,
1964  mp4_descr_count, pid, ts) < 0)
1965  break;
1966 
1967  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1968  stream_type == 0x83 && pes->sub_st) {
1970  pes->sub_st->index);
1971  pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1972  }
1973  }
1974  p = desc_list_end;
1975  }
1976 
1977  if (!ts->pids[pcr_pid])
1978  mpegts_open_pcr_filter(ts, pcr_pid);
1979 
1980 out:
1981  for (i = 0; i < mp4_descr_count; i++)
1982  av_free(mp4_descr[i].dec_config_descr);
1983 }
1984 
1985 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1986 {
1987  MpegTSContext *ts = filter->u.section_filter.opaque;
1988  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1989  SectionHeader h1, *h = &h1;
1990  const uint8_t *p, *p_end;
1991  int sid, pmt_pid;
1992  AVProgram *program;
1993 
1994  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
1995  hex_dump_debug(ts->stream, section, section_len);
1996 
1997  p_end = section + section_len - 4;
1998  p = section;
1999  if (parse_section_header(h, &p, p_end) < 0)
2000  return;
2001  if (h->tid != PAT_TID)
2002  return;
2003  if (ts->skip_changes)
2004  return;
2005 
2006  if (skip_identical(h, tssf))
2007  return;
2008  ts->stream->ts_id = h->id;
2009 
2010  clear_programs(ts);
2011  for (;;) {
2012  sid = get16(&p, p_end);
2013  if (sid < 0)
2014  break;
2015  pmt_pid = get16(&p, p_end);
2016  if (pmt_pid < 0)
2017  break;
2018  pmt_pid &= 0x1fff;
2019 
2020  if (pmt_pid == ts->current_pid)
2021  break;
2022 
2023  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2024 
2025  if (sid == 0x0000) {
2026  /* NIT info */
2027  } else {
2028  MpegTSFilter *fil = ts->pids[pmt_pid];
2029  program = av_new_program(ts->stream, sid);
2030  if (program) {
2031  program->program_num = sid;
2032  program->pmt_pid = pmt_pid;
2033  }
2034  if (fil)
2035  if ( fil->type != MPEGTS_SECTION
2036  || fil->pid != pmt_pid
2037  || fil->u.section_filter.section_cb != pmt_cb)
2038  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2039 
2040  if (!ts->pids[pmt_pid])
2041  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2042  add_pat_entry(ts, sid);
2043  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2044  add_pid_to_pmt(ts, sid, pmt_pid);
2045  }
2046  }
2047 
2048  if (sid < 0) {
2049  int i,j;
2050  for (j=0; j<ts->stream->nb_programs; j++) {
2051  for (i = 0; i < ts->nb_prg; i++)
2052  if (ts->prg[i].id == ts->stream->programs[j]->id)
2053  break;
2054  if (i==ts->nb_prg && !ts->skip_clear)
2055  clear_avprogram(ts, ts->stream->programs[j]->id);
2056  }
2057  }
2058 }
2059 
2060 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2061 {
2062  MpegTSContext *ts = filter->u.section_filter.opaque;
2063  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2064  SectionHeader h1, *h = &h1;
2065  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2066  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2067  char *name, *provider_name;
2068 
2069  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2070  hex_dump_debug(ts->stream, section, section_len);
2071 
2072  p_end = section + section_len - 4;
2073  p = section;
2074  if (parse_section_header(h, &p, p_end) < 0)
2075  return;
2076  if (h->tid != SDT_TID)
2077  return;
2078  if (ts->skip_changes)
2079  return;
2080  if (skip_identical(h, tssf))
2081  return;
2082 
2083  onid = get16(&p, p_end);
2084  if (onid < 0)
2085  return;
2086  val = get8(&p, p_end);
2087  if (val < 0)
2088  return;
2089  for (;;) {
2090  sid = get16(&p, p_end);
2091  if (sid < 0)
2092  break;
2093  val = get8(&p, p_end);
2094  if (val < 0)
2095  break;
2096  desc_list_len = get16(&p, p_end);
2097  if (desc_list_len < 0)
2098  break;
2099  desc_list_len &= 0xfff;
2100  desc_list_end = p + desc_list_len;
2101  if (desc_list_end > p_end)
2102  break;
2103  for (;;) {
2104  desc_tag = get8(&p, desc_list_end);
2105  if (desc_tag < 0)
2106  break;
2107  desc_len = get8(&p, desc_list_end);
2108  desc_end = p + desc_len;
2109  if (desc_len < 0 || desc_end > desc_list_end)
2110  break;
2111 
2112  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2113  desc_tag, desc_len);
2114 
2115  switch (desc_tag) {
2116  case 0x48:
2117  service_type = get8(&p, p_end);
2118  if (service_type < 0)
2119  break;
2120  provider_name = getstr8(&p, p_end);
2121  if (!provider_name)
2122  break;
2123  name = getstr8(&p, p_end);
2124  if (name) {
2125  AVProgram *program = av_new_program(ts->stream, sid);
2126  if (program) {
2127  av_dict_set(&program->metadata, "service_name", name, 0);
2128  av_dict_set(&program->metadata, "service_provider",
2129  provider_name, 0);
2130  }
2131  }
2132  av_free(name);
2133  av_free(provider_name);
2134  break;
2135  default:
2136  break;
2137  }
2138  p = desc_end;
2139  }
2140  p = desc_list_end;
2141  }
2142 }
2143 
2144 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2145  const uint8_t *packet);
2146 
2147 /* handle one TS packet */
2148 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2149 {
2150  MpegTSFilter *tss;
2151  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2152  has_adaptation, has_payload;
2153  const uint8_t *p, *p_end;
2154  int64_t pos;
2155 
2156  pid = AV_RB16(packet + 1) & 0x1fff;
2157  if (pid && discard_pid(ts, pid))
2158  return 0;
2159  is_start = packet[1] & 0x40;
2160  tss = ts->pids[pid];
2161  if (ts->auto_guess && !tss && is_start) {
2162  add_pes_stream(ts, pid, -1);
2163  tss = ts->pids[pid];
2164  }
2165  if (!tss)
2166  return 0;
2167  ts->current_pid = pid;
2168 
2169  afc = (packet[3] >> 4) & 3;
2170  if (afc == 0) /* reserved value */
2171  return 0;
2172  has_adaptation = afc & 2;
2173  has_payload = afc & 1;
2174  is_discontinuity = has_adaptation &&
2175  packet[4] != 0 && /* with length > 0 */
2176  (packet[5] & 0x80); /* and discontinuity indicated */
2177 
2178  /* continuity check (currently not used) */
2179  cc = (packet[3] & 0xf);
2180  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2181  cc_ok = pid == 0x1FFF || // null packet PID
2182  is_discontinuity ||
2183  tss->last_cc < 0 ||
2184  expected_cc == cc;
2185 
2186  tss->last_cc = cc;
2187  if (!cc_ok) {
2188  av_log(ts->stream, AV_LOG_DEBUG,
2189  "Continuity check failed for pid %d expected %d got %d\n",
2190  pid, expected_cc, cc);
2191  if (tss->type == MPEGTS_PES) {
2192  PESContext *pc = tss->u.pes_filter.opaque;
2193  pc->flags |= AV_PKT_FLAG_CORRUPT;
2194  }
2195  }
2196 
2197  p = packet + 4;
2198  if (has_adaptation) {
2199  int64_t pcr_h;
2200  int pcr_l;
2201  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2202  tss->last_pcr = pcr_h * 300 + pcr_l;
2203  /* skip adaptation field */
2204  p += p[0] + 1;
2205  }
2206  /* if past the end of packet, ignore */
2207  p_end = packet + TS_PACKET_SIZE;
2208  if (p >= p_end || !has_payload)
2209  return 0;
2210 
2211  pos = avio_tell(ts->stream->pb);
2212  if (pos >= 0) {
2213  av_assert0(pos >= TS_PACKET_SIZE);
2214  ts->pos47_full = pos - TS_PACKET_SIZE;
2215  }
2216 
2217  if (tss->type == MPEGTS_SECTION) {
2218  if (is_start) {
2219  /* pointer field present */
2220  len = *p++;
2221  if (len > p_end - p)
2222  return 0;
2223  if (len && cc_ok) {
2224  /* write remaining section bytes */
2225  write_section_data(ts, tss,
2226  p, len, 0);
2227  /* check whether filter has been closed */
2228  if (!ts->pids[pid])
2229  return 0;
2230  }
2231  p += len;
2232  if (p < p_end) {
2233  write_section_data(ts, tss,
2234  p, p_end - p, 1);
2235  }
2236  } else {
2237  if (cc_ok) {
2238  write_section_data(ts, tss,
2239  p, p_end - p, 0);
2240  }
2241  }
2242 
2243  // stop find_stream_info from waiting for more streams
2244  // when all programs have received a PMT
2245  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2246  int i;
2247  for (i = 0; i < ts->nb_prg; i++) {
2248  if (!ts->prg[i].pmt_found)
2249  break;
2250  }
2251  if (i == ts->nb_prg && ts->nb_prg > 0) {
2252  int types = 0;
2253  for (i = 0; i < ts->stream->nb_streams; i++) {
2254  AVStream *st = ts->stream->streams[i];
2255  types |= 1<<st->codec->codec_type;
2256  }
2257  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2258  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2260  }
2261  }
2262  }
2263 
2264  } else {
2265  int ret;
2266  // Note: The position here points actually behind the current packet.
2267  if (tss->type == MPEGTS_PES) {
2268  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2269  pos - ts->raw_packet_size)) < 0)
2270  return ret;
2271  }
2272  }
2273 
2274  return 0;
2275 }
2276 
2277 static void reanalyze(MpegTSContext *ts) {
2278  AVIOContext *pb = ts->stream->pb;
2279  int64_t pos = avio_tell(pb);
2280  if (pos < 0)
2281  return;
2282  pos -= ts->pos47_full;
2283  if (pos == TS_PACKET_SIZE) {
2284  ts->size_stat[0] ++;
2285  } else if (pos == TS_DVHS_PACKET_SIZE) {
2286  ts->size_stat[1] ++;
2287  } else if (pos == TS_FEC_PACKET_SIZE) {
2288  ts->size_stat[2] ++;
2289  }
2290 
2291  ts->size_stat_count ++;
2293  int newsize = 0;
2294  if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2295  newsize = TS_PACKET_SIZE;
2296  } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2297  newsize = TS_DVHS_PACKET_SIZE;
2298  } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2299  newsize = TS_FEC_PACKET_SIZE;
2300  }
2301  if (newsize && newsize != ts->raw_packet_size) {
2302  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2303  ts->raw_packet_size = newsize;
2304  }
2305  ts->size_stat_count = 0;
2306  memset(ts->size_stat, 0, sizeof(ts->size_stat));
2307  }
2308 }
2309 
2310 /* XXX: try to find a better synchro over several packets (use
2311  * get_packet_size() ?) */
2313 {
2314  MpegTSContext *ts = s->priv_data;
2315  AVIOContext *pb = s->pb;
2316  int c, i;
2317 
2318  for (i = 0; i < ts->resync_size; i++) {
2319  c = avio_r8(pb);
2320  if (avio_feof(pb))
2321  return AVERROR_EOF;
2322  if (c == 0x47) {
2323  avio_seek(pb, -1, SEEK_CUR);
2324  reanalyze(s->priv_data);
2325  return 0;
2326  }
2327  }
2328  av_log(s, AV_LOG_ERROR,
2329  "max resync size reached, could not find sync byte\n");
2330  /* no sync found */
2331  return AVERROR_INVALIDDATA;
2332 }
2333 
2334 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2335 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2336  const uint8_t **data)
2337 {
2338  AVIOContext *pb = s->pb;
2339  int len;
2340 
2341  for (;;) {
2342  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2343  if (len != TS_PACKET_SIZE)
2344  return len < 0 ? len : AVERROR_EOF;
2345  /* check packet sync byte */
2346  if ((*data)[0] != 0x47) {
2347  /* find a new packet start */
2348  uint64_t pos = avio_tell(pb);
2349  avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2350 
2351  if (mpegts_resync(s) < 0)
2352  return AVERROR(EAGAIN);
2353  else
2354  continue;
2355  } else {
2356  break;
2357  }
2358  }
2359  return 0;
2360 }
2361 
2362 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2363 {
2364  AVIOContext *pb = s->pb;
2365  int skip = raw_packet_size - TS_PACKET_SIZE;
2366  if (skip > 0)
2367  avio_skip(pb, skip);
2368 }
2369 
2370 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2371 {
2372  AVFormatContext *s = ts->stream;
2374  const uint8_t *data;
2375  int64_t packet_num;
2376  int ret = 0;
2377 
2378  if (avio_tell(s->pb) != ts->last_pos) {
2379  int i;
2380  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2381  /* seek detected, flush pes buffer */
2382  for (i = 0; i < NB_PID_MAX; i++) {
2383  if (ts->pids[i]) {
2384  if (ts->pids[i]->type == MPEGTS_PES) {
2385  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2386  av_buffer_unref(&pes->buffer);
2387  pes->data_index = 0;
2388  pes->state = MPEGTS_SKIP; /* skip until pes header */
2389  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2390  ts->pids[i]->u.section_filter.last_ver = -1;
2391  }
2392  ts->pids[i]->last_cc = -1;
2393  ts->pids[i]->last_pcr = -1;
2394  }
2395  }
2396  }
2397 
2398  ts->stop_parse = 0;
2399  packet_num = 0;
2400  memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2401  for (;;) {
2402  packet_num++;
2403  if (nb_packets != 0 && packet_num >= nb_packets ||
2404  ts->stop_parse > 1) {
2405  ret = AVERROR(EAGAIN);
2406  break;
2407  }
2408  if (ts->stop_parse > 0)
2409  break;
2410 
2411  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2412  if (ret != 0)
2413  break;
2414  ret = handle_packet(ts, data);
2416  if (ret != 0)
2417  break;
2418  }
2419  ts->last_pos = avio_tell(s->pb);
2420  return ret;
2421 }
2422 
2424 {
2425  const int size = p->buf_size;
2426  int maxscore = 0;
2427  int sumscore = 0;
2428  int i;
2429  int check_count = size / TS_FEC_PACKET_SIZE;
2430 #define CHECK_COUNT 10
2431 #define CHECK_BLOCK 100
2432 
2433  if (check_count < CHECK_COUNT)
2434  return AVERROR_INVALIDDATA;
2435 
2436  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2437  int left = FFMIN(check_count - i, CHECK_BLOCK);
2438  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL, 1);
2439  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL, 1);
2440  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL, 1);
2441  score = FFMAX3(score, dvhs_score, fec_score);
2442  sumscore += score;
2443  maxscore = FFMAX(maxscore, score);
2444  }
2445 
2446  sumscore = sumscore * CHECK_COUNT / check_count;
2447  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2448 
2449  av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2450 
2451  if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2452  else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2453  else
2454  return AVERROR_INVALIDDATA;
2455 }
2456 
2457 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2458  * (-1) if not available */
2459 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2460 {
2461  int afc, len, flags;
2462  const uint8_t *p;
2463  unsigned int v;
2464 
2465  afc = (packet[3] >> 4) & 3;
2466  if (afc <= 1)
2467  return AVERROR_INVALIDDATA;
2468  p = packet + 4;
2469  len = p[0];
2470  p++;
2471  if (len == 0)
2472  return AVERROR_INVALIDDATA;
2473  flags = *p++;
2474  len--;
2475  if (!(flags & 0x10))
2476  return AVERROR_INVALIDDATA;
2477  if (len < 6)
2478  return AVERROR_INVALIDDATA;
2479  v = AV_RB32(p);
2480  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2481  *ppcr_low = ((p[4] & 1) << 8) | p[5];
2482  return 0;
2483 }
2484 
2485 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2486 
2487  /* NOTE: We attempt to seek on non-seekable files as well, as the
2488  * probe buffer usually is big enough. Only warn if the seek failed
2489  * on files where the seek should work. */
2490  if (avio_seek(pb, pos, SEEK_SET) < 0)
2491  av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2492 }
2493 
2495 {
2496  MpegTSContext *ts = s->priv_data;
2497  AVIOContext *pb = s->pb;
2498  uint8_t buf[8 * 1024] = {0};
2499  int len;
2500  int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2;
2501 
2502  if (ffio_ensure_seekback(pb, probesize) < 0)
2503  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2504 
2505  /* read the first 8192 bytes to get packet size */
2506  pos = avio_tell(pb);
2507  len = avio_read(pb, buf, sizeof(buf));
2508  ts->raw_packet_size = get_packet_size(buf, len);
2509  if (ts->raw_packet_size <= 0) {
2510  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2512  }
2513  ts->stream = s;
2514  ts->auto_guess = 0;
2515 
2516  if (s->iformat == &ff_mpegts_demuxer) {
2517  /* normal demux */
2518 
2519  /* first do a scan to get all the services */
2520  seek_back(s, pb, pos);
2521 
2523 
2525 
2526  handle_packets(ts, probesize / ts->raw_packet_size);
2527  /* if could not find service, enable auto_guess */
2528 
2529  ts->auto_guess = 1;
2530 
2531  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2532 
2534  } else {
2535  AVStream *st;
2536  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2537  int64_t pcrs[2], pcr_h;
2538  int packet_count[2];
2539  uint8_t packet[TS_PACKET_SIZE];
2540  const uint8_t *data;
2541 
2542  /* only read packets */
2543 
2544  st = avformat_new_stream(s, NULL);
2545  if (!st)
2546  return AVERROR(ENOMEM);
2547  avpriv_set_pts_info(st, 60, 1, 27000000);
2550 
2551  /* we iterate until we find two PCRs to estimate the bitrate */
2552  pcr_pid = -1;
2553  nb_pcrs = 0;
2554  nb_packets = 0;
2555  for (;;) {
2556  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2557  if (ret < 0)
2558  return ret;
2559  pid = AV_RB16(data + 1) & 0x1fff;
2560  if ((pcr_pid == -1 || pcr_pid == pid) &&
2561  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2563  pcr_pid = pid;
2564  packet_count[nb_pcrs] = nb_packets;
2565  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2566  nb_pcrs++;
2567  if (nb_pcrs >= 2)
2568  break;
2569  } else {
2571  }
2572  nb_packets++;
2573  }
2574 
2575  /* NOTE1: the bitrate is computed without the FEC */
2576  /* NOTE2: it is only the bitrate of the start of the stream */
2577  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2578  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2579  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2580  st->codec->bit_rate = s->bit_rate;
2581  st->start_time = ts->cur_pcr;
2582  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2583  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2584  }
2585 
2586  seek_back(s, pb, pos);
2587  return 0;
2588 }
2589 
2590 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2591 
2593 {
2594  MpegTSContext *ts = s->priv_data;
2595  int ret, i;
2596  int64_t pcr_h, next_pcr_h, pos;
2597  int pcr_l, next_pcr_l;
2598  uint8_t pcr_buf[12];
2599  const uint8_t *data;
2600 
2601  if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2602  return AVERROR(ENOMEM);
2603  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2604  pkt->pos = avio_tell(s->pb);
2605  if (ret < 0) {
2606  av_free_packet(pkt);
2607  return ret;
2608  }
2609  if (data != pkt->data)
2610  memcpy(pkt->data, data, ts->raw_packet_size);
2612  if (ts->mpeg2ts_compute_pcr) {
2613  /* compute exact PCR for each packet */
2614  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2615  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2616  pos = avio_tell(s->pb);
2617  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2618  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2619  avio_read(s->pb, pcr_buf, 12);
2620  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2621  /* XXX: not precise enough */
2622  ts->pcr_incr =
2623  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2624  (i + 1);
2625  break;
2626  }
2627  }
2628  avio_seek(s->pb, pos, SEEK_SET);
2629  /* no next PCR found: we use previous increment */
2630  ts->cur_pcr = pcr_h * 300 + pcr_l;
2631  }
2632  pkt->pts = ts->cur_pcr;
2633  pkt->duration = ts->pcr_incr;
2634  ts->cur_pcr += ts->pcr_incr;
2635  }
2636  pkt->stream_index = 0;
2637  return 0;
2638 }
2639 
2641 {
2642  MpegTSContext *ts = s->priv_data;
2643  int ret, i;
2644 
2645  pkt->size = -1;
2646  ts->pkt = pkt;
2647  ret = handle_packets(ts, 0);
2648  if (ret < 0) {
2649  av_free_packet(ts->pkt);
2650  /* flush pes data left */
2651  for (i = 0; i < NB_PID_MAX; i++)
2652  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2653  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2654  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2655  new_pes_packet(pes, pkt);
2656  pes->state = MPEGTS_SKIP;
2657  ret = 0;
2658  break;
2659  }
2660  }
2661  }
2662 
2663  if (!ret && pkt->size < 0)
2664  ret = AVERROR(EINTR);
2665  return ret;
2666 }
2667 
2668 static void mpegts_free(MpegTSContext *ts)
2669 {
2670  int i;
2671 
2672  clear_programs(ts);
2673 
2674  for (i = 0; i < NB_PID_MAX; i++)
2675  if (ts->pids[i])
2676  mpegts_close_filter(ts, ts->pids[i]);
2677 }
2678 
2680 {
2681  MpegTSContext *ts = s->priv_data;
2682  mpegts_free(ts);
2683  return 0;
2684 }
2685 
2686 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2687  int64_t *ppos, int64_t pos_limit)
2688 {
2689  MpegTSContext *ts = s->priv_data;
2690  int64_t pos, timestamp;
2692  int pcr_l, pcr_pid =
2693  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2694  int pos47 = ts->pos47_full % ts->raw_packet_size;
2695  pos =
2696  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2697  ts->raw_packet_size + pos47;
2698  while(pos < pos_limit) {
2699  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2700  return AV_NOPTS_VALUE;
2701  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2702  return AV_NOPTS_VALUE;
2703  if (buf[0] != 0x47) {
2704  avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2705  if (mpegts_resync(s) < 0)
2706  return AV_NOPTS_VALUE;
2707  pos = avio_tell(s->pb);
2708  continue;
2709  }
2710  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2711  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
2712  *ppos = pos;
2713  return timestamp;
2714  }
2715  pos += ts->raw_packet_size;
2716  }
2717 
2718  return AV_NOPTS_VALUE;
2719 }
2720 
2721 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2722  int64_t *ppos, int64_t pos_limit)
2723 {
2724  MpegTSContext *ts = s->priv_data;
2725  int64_t pos;
2726  int pos47 = ts->pos47_full % ts->raw_packet_size;
2727  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2729  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2730  return AV_NOPTS_VALUE;
2731  while(pos < pos_limit) {
2732  int ret;
2733  AVPacket pkt;
2734  av_init_packet(&pkt);
2735  ret = av_read_frame(s, &pkt);
2736  if (ret < 0)
2737  return AV_NOPTS_VALUE;
2738  av_free_packet(&pkt);
2739  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2740  ff_reduce_index(s, pkt.stream_index);
2741  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2742  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2743  *ppos = pkt.pos;
2744  return pkt.dts;
2745  }
2746  }
2747  pos = pkt.pos;
2748  }
2749 
2750  return AV_NOPTS_VALUE;
2751 }
2752 
2753 /**************************************************************/
2754 /* parsing functions - called from other demuxers such as RTP */
2755 
2757 {
2758  MpegTSContext *ts;
2759 
2760  ts = av_mallocz(sizeof(MpegTSContext));
2761  if (!ts)
2762  return NULL;
2763  /* no stream case, currently used by RTP */
2765  ts->stream = s;
2766  ts->auto_guess = 1;
2769 
2770  return ts;
2771 }
2772 
2773 /* return the consumed length if a packet was output, or -1 if no
2774  * packet is output */
2776  const uint8_t *buf, int len)
2777 {
2778  int len1;
2779 
2780  len1 = len;
2781  ts->pkt = pkt;
2782  for (;;) {
2783  ts->stop_parse = 0;
2784  if (len < TS_PACKET_SIZE)
2785  return AVERROR_INVALIDDATA;
2786  if (buf[0] != 0x47) {
2787  buf++;
2788  len--;
2789  } else {
2790  handle_packet(ts, buf);
2791  buf += TS_PACKET_SIZE;
2792  len -= TS_PACKET_SIZE;
2793  if (ts->stop_parse == 1)
2794  break;
2795  }
2796  }
2797  return len1 - len;
2798 }
2799 
2801 {
2802  mpegts_free(ts);
2803  av_free(ts);
2804 }
2805 
2806 AVInputFormat ff_mpegts_demuxer = {
2807  .name = "mpegts",
2808  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2809  .priv_data_size = sizeof(MpegTSContext),
2814  .read_timestamp = mpegts_get_dts,
2816  .priv_class = &mpegts_class,
2817 };
2818 
2820  .name = "mpegtsraw",
2821  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2822  .priv_data_size = sizeof(MpegTSContext),
2826  .read_timestamp = mpegts_get_dts,
2828  .priv_class = &mpegtsraw_class,
2829 };
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:2668
unsigned last_crc
Definition: mpegts.c:80
uint8_t last_sec_num
Definition: mpegts.c:588
#define NULL
Definition: coverity.c:32
#define SDT_PID
Definition: mpegts.h:37
int64_t pos47_full
Definition: mpegts.c:121
const char const char void * val
Definition: avisynth_c.h:634
int64_t last_pcr
Definition: mpegts.c:92
float v
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
int es_id
Definition: mpegts.c:90
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define PES_START_SIZE
Definition: mpegts.c:218
#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:210
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:280
int total_size
Definition: mpegts.c:234
static int mpegts_resync(AVFormatContext *s)
Definition: mpegts.c:2312
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:422
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2362
AVOption.
Definition: opt.h:255
A dummy id pointing at the start of audio codecs.
Definition: avcodec.h:328
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:132
#define AV_OPT_FLAG_EXPORT
The option is inteded for exporting values to the caller.
Definition: opt.h:296
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:1742
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:2590
enum AVMediaType codec_type
Definition: mpegts.c:683
int64_t dts
Definition: mpegts.c:237
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1306
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
Definition: mpegts.c:2148
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1187
static void clear_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:272
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:4006
static void skip_bits_long(GetBitContext *s, int n)
Definition: get_bits.h:217
static int mpegts_probe(AVProbeData *p)
Definition: mpegts.c:2423
#define MP4ODescrTag
Definition: isom.h:208
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:157
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:2756
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1132
int index
stream index in AVFormatContext
Definition: avformat.h:843
int size
Definition: avcodec.h:1163
MpegTSPESFilter pes_filter
Definition: mpegts.c:95
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:203
uint8_t version
Definition: mpegts.c:586
int size_stat_count
Definition: mpegts.c:118
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:810
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:2806
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2060
A dummy ID pointing at the start of various fake codecs.
Definition: avcodec.h:530
void * priv_data
Definition: avformat.h:862
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:276
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:812
#define M4OD_TID
Definition: mpegts.h:42
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:652
discard all
Definition: avcodec.h:669
enum MpegTSFilterType type
Definition: mpegts.c:93
static AVPacket pkt
int pid
Definition: mpegts.c:223
struct Program * prg
Definition: mpegts.c:155
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2640
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:674
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1321
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:85
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:224
SLConfigDescr sl
Definition: mpegts.h:92
union MpegTSFilter::@162 u
int packet_seq_num_len
Definition: mpegts.h:85
int es_id
Definition: mpegts.h:89
int inst_bitrate_len
Definition: mpegts.h:82
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:154
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:467
int last_cc
Definition: mpegts.c:91
Format I/O context.
Definition: avformat.h:1272
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2335
unsigned int nb_stream_indexes
Definition: avformat.h:1210
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:104
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1621
#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:1670
#define SIZE_STAT_THRESHOLD
Definition: mpegts.c:119
Public dictionary API.
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:889
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:159
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:2494
if()
Definition: avfilter.c:975
AVFormatContext * s
Definition: mpegts.c:1241
uint8_t bits
Definition: crc.c:295
uint8_t
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: avformat.h:1069
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:196
static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:246
enum MpegTSState state
Definition: mpegts.c:230
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2721
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1231
AVOptions.
int size_stat[3]
Definition: mpegts.c:117
int au_seq_num_len
Definition: mpegts.h:84
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:204
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:689
int stop_parse
stop parsing loop
Definition: mpegts.c:137
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1320
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:350
static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:290
static int mpegts_push_data(MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
Definition: mpegts.c:961
int id
Format-specific stream ID.
Definition: avformat.h:849
enum AVStreamParseType need_parsing
Definition: avformat.h:1035
int use_au_start
Definition: mpegts.h:72
static const AVOption raw_options[]
Definition: mpegts.c:188
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1355
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3672
int pmt_pid
Definition: avformat.h:1214
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1549
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:85
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1340
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Mp4Descr * descr
Definition: mpegts.c:1243
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:593
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1273
uint8_t * data
Definition: avcodec.h:1162
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:3740
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
MpegTSState
Definition: mpegts.c:209
int64_t probesize2
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1777
uint32_t tag
Definition: movenc.c:1333
#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:89
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:365
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:2485
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1208
static int probe(AVProbeData *p)
Definition: act.c:36
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1215
int duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1180
unsigned int * stream_index
Definition: avformat.h:1209
int scan_all_pmts
Definition: mpegts.c:146
#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:537
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:490
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:2819
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1251
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:83
#define AVINDEX_KEYFRAME
Definition: avformat.h:791
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:588
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:357
enum AVCodecID codec_id
Definition: mpegts.c:684
AVBufferRef * buffer
Definition: mpegts.c:240
AVProgram * av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
Find the programs which belong to a given stream.
Definition: utils.c:3479
static const uint8_t opus_default_extradata[30]
Definition: opus.h:67
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:447
static void reanalyze(MpegTSContext *ts)
Definition: mpegts.c:2277
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:213
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1248
static const StreamType HDMV_types[]
Definition: mpegts.c:708
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:474
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:257
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:2679
unsigned int check_crc
Definition: mpegts.c:82
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:2592
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:3779
const char * r
Definition: vf_curves.c:107
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1421
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:421
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1145
int pes_header_size
Definition: mpegts.c:235
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
simple assert() macros that are a bit more flexible than ISO C assert().
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1205
#define FFMAX(a, b)
Definition: common.h:64
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:79
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1338
int flags
copied to the AVPacket flags
Definition: mpegts.c:233
int program_num
Definition: avformat.h:1213
#define MAX_SECTION_SIZE
Definition: mpegts.h:33
int pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:133
int current_pid
Definition: mpegts.c:160
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1168
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:528
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:451
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:630
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1328
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:4085
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1305
int64_t ts_packet_pos
position of first TS packet of this PES packet
Definition: mpegts.c:238
SectionCallback * section_cb
Definition: mpegts.c:84
static const StreamType REGD_types[]
Definition: mpegts.c:729
int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
Definition: mpegts.c:63
#define FFMIN(a, b)
Definition: common.h:66
static const StreamType MISC_types[]
Definition: mpegts.c:723
uint16_t id
Definition: mpegts.c:585
static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
Definition: mpegts.c:331
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:1456
#define TS_DVHS_PACKET_SIZE
Definition: mpegts.h:28
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
ret
Definition: avfilter.c:974
AVStream * st
Definition: mpegts.c:228
#define MP4IODescrTag
Definition: isom.h:209
AVFormatContext * stream
Definition: mpegts.c:113
int skip_changes
Definition: mpegts.c:143
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:356
static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:322
int ocr_len
Definition: mpegts.h:80
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:777
AVDictionary * metadata
Definition: avformat.h:916
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1545
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1391
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1352
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:127
static const AVClass mpegtsraw_class
Definition: mpegts.c:200
MpegTSSectionFilter section_filter
Definition: mpegts.c:96
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1541
#define CHECK_BLOCK
unsigned int probesize
Definition: avformat.h:1410
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:882
uint8_t sec_num
Definition: mpegts.c:587
int extended_stream_id
Definition: mpegts.c:236
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:107
int stream_type
Definition: mpegts.c:225
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:124
int raw_packet_size
raw packet size, including FEC if present
Definition: mpegts.c:115
static const StreamType ISO_types[]
Definition: mpegts.c:687
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:620
int ts_id
Transport stream id.
Definition: avformat.h:1582
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:811
Stream structure.
Definition: avformat.h:842
#define av_dlog(pctx,...)
av_dlog macros
Definition: log.h:330
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:546
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:2686
#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:91
enum AVMediaType codec_type
Definition: avcodec.h:1249
unsigned int id
Definition: mpegts.c:102
#define MP4DecConfigDescrTag
Definition: isom.h:211
enum AVCodecID codec_id
Definition: avcodec.h:1258
static MpegTSFilter * mpegts_open_filter(MpegTSContext *ts, unsigned int pid, enum MpegTSFilterType type)
Definition: mpegts.c:442
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:37
AVIOContext * pb
I/O context.
Definition: avformat.h:1314
static const StreamType METADATA_types[]
Definition: mpegts.c:743
int use_au_end
Definition: mpegts.h:73
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1283
int resync_size
Definition: mpegts.c:148
uint8_t * data
The data buffer.
Definition: buffer.h:89
static void new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:851
static int get_packet_size(const uint8_t *buf, int size)
Definition: mpegts.c:560
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1273
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2864
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
void * buf
Definition: avisynth_c.h:553
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:220
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:602
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1356
#define MAX_LEVEL
Definition: mpegts.c:1239
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:100
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:304
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:2459
int use_timestamps
Definition: mpegts.h:76
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:297
int index
Definition: gxfenc.c:89
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1814
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:286
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:410
static int analyze(const uint8_t *buf, int size, int packet_size, int *index, int probe)
Definition: mpegts.c:532
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:2775
AVMediaType
Definition: avutil.h:192
refcounted data buffer API
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:511
static const StreamType DESC_types[]
Definition: mpegts.c:750
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
int use_idle
Definition: mpegts.h:77
SLConfigDescr sl
Definition: mpegts.c:241
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1475
int dec_config_descr_len
Definition: mpegts.h:90
uint8_t * section_buf
Definition: mpegts.c:81
uint8_t tid
Definition: mpegts.c:584
AVDictionary * metadata
Definition: avformat.h:1211
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:163
static int flags
Definition: cpu.c:47
unsigned int end_of_section_reached
Definition: mpegts.c:83
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:388
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:1560
static void clear_programs(MpegTSContext *ts)
Definition: mpegts.c:284
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:809
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:342
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
A reference to a data buffer.
Definition: buffer.h:81
static const AVOption options[]
Definition: mpegts.c:166
full parsing and repack
Definition: avformat.h:774
AVFormatContext * stream
Definition: mpegts.c:227
int skip_clear
Definition: mpegts.c:144
Main libavformat public API header.
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1985
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:413
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
static const AVClass mpegts_class
Definition: mpegts.c:181
int use_rand_acc_pt
Definition: mpegts.h:74
int data_index
Definition: mpegts.c:232
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1144
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:72
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:894
static double c[64]
unsigned crc
Definition: mpegts.c:79
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:905
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:239
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:842
#define MAX_PES_PAYLOAD
Definition: mpegts.c:44
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int pmt_found
have we found pmt for this program
Definition: mpegts.c:107
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1209
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1284
PESCallback * pes_cb
Definition: mpegts.c:67
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:591
static MpegTSFilter * mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
Definition: mpegts.c:465
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:544
unsigned int nb_pids
Definition: mpegts.c:103
void * opaque
Definition: mpegts.c:68
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:615
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1244
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:139
int len
#define PAT_PID
Definition: mpegts.h:36
void * priv_data
Format private data.
Definition: avformat.h:1300
int pcr_pid
Definition: avformat.h:1215
int64_t last_pos
to detect seek
Definition: mpegts.c:141
int timestamp_res
Definition: mpegts.h:78
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:301
#define PES_HEADER_SIZE
Definition: mpegts.c:219
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
Definition: mpegts.c:304
int64_t pts
Definition: mpegts.c:237
int use_padding
Definition: mpegts.h:75
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:73
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1161
int bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1374
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:300
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:506
int degr_prior_len
Definition: mpegts.h:83
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1294
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1472
AVIOContext pb
Definition: mpegts.c:1242
int stream_index
Definition: avcodec.h:1164
MpegTSFilterType
Definition: mpegts.c:55
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:46
#define MKTAG(a, b, c, d)
Definition: common.h:315
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:907
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:759
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:2800
int au_len
Definition: mpegts.h:81
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1081
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:85
This structure stores compressed data.
Definition: avcodec.h:1139
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:250
uint32_t stream_type
Definition: mpegts.c:682
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:630
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1155
A dummy ID pointing at the start of subtitle codecs.
Definition: avcodec.h:504
#define FFMAX3(a, b, c)
Definition: common.h:65
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:241
#define av_unused
Definition: attributes.h:118
AVProgram ** programs
Definition: avformat.h:1422
#define MP4SLDescrTag
Definition: isom.h:213
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:130
#define NB_PID_MAX
Definition: mpegts.h:32
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2370
#define SDT_TID
Definition: mpegts.h:43
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:71
const char * name
Definition: opengl_enc.c:103
AVStream * sub_st
stream for the embedded AC3 stream in HDMV TrueHD
Definition: mpegts.c:229
MpegTSContext * ts
Definition: mpegts.c:226
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:1440