FFmpeg  4.2.3
mpegts.c
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1 /*
2  * MPEG-2 transport stream (aka DVB) demuxer
3  * Copyright (c) 2002-2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/get_bits.h"
33 #include "libavcodec/opus.h"
34 #include "avformat.h"
35 #include "mpegts.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "mpeg.h"
39 #include "isom.h"
40 #if CONFIG_ICONV
41 #include <iconv.h>
42 #endif
43 
44 /* maximum size in which we look for synchronization if
45  * synchronization is lost */
46 #define MAX_RESYNC_SIZE 65536
47 
48 #define MAX_PES_PAYLOAD 200 * 1024
49 
50 #define MAX_MP4_DESCR_COUNT 16
51 
52 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
53  do { \
54  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
55  (modulus) = (dividend) % (divisor); \
56  (prev_dividend) = (dividend); \
57  } while (0)
58 
59 #define PROBE_PACKET_MAX_BUF 8192
60 #define PROBE_PACKET_MARGIN 5
61 
66 };
67 
68 typedef struct MpegTSFilter MpegTSFilter;
69 
70 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
71  int is_start, int64_t pos);
72 
73 typedef struct MpegTSPESFilter {
75  void *opaque;
77 
78 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
79 
80 typedef void SetServiceCallback (void *opaque, int ret);
81 
82 typedef struct MpegTSSectionFilter {
85  int last_ver;
86  unsigned crc;
87  unsigned last_crc;
89  unsigned int check_crc : 1;
90  unsigned int end_of_section_reached : 1;
92  void *opaque;
94 
95 struct MpegTSFilter {
96  int pid;
97  int es_id;
98  int last_cc; /* last cc code (-1 if first packet) */
99  int64_t last_pcr;
100  int discard;
102  union {
105  } u;
106 };
107 
108 #define MAX_PIDS_PER_PROGRAM 64
109 struct Program {
110  unsigned int id; // program id/service id
111  unsigned int nb_pids;
112  unsigned int pids[MAX_PIDS_PER_PROGRAM];
113 
114  /** have we found pmt for this program */
116 };
117 
119  const AVClass *class;
120  /* user data */
122  /** raw packet size, including FEC if present */
124 
125  int size_stat[3];
127 #define SIZE_STAT_THRESHOLD 10
128 
129  int64_t pos47_full;
130 
131  /** if true, all pids are analyzed to find streams */
133 
134  /** compute exact PCR for each transport stream packet */
136 
137  /** fix dvb teletext pts */
139 
140  int64_t cur_pcr; /**< used to estimate the exact PCR */
141  int pcr_incr; /**< used to estimate the exact PCR */
142 
143  /* data needed to handle file based ts */
144  /** stop parsing loop */
146  /** packet containing Audio/Video data */
148  /** to detect seek */
149  int64_t last_pos;
150 
154 
156 
159 
160  /******************************************/
161  /* private mpegts data */
162  /* scan context */
163  /** structure to keep track of Program->pids mapping */
164  unsigned int nb_prg;
165  struct Program *prg;
166 
167  int8_t crc_validity[NB_PID_MAX];
168  /** filters for various streams specified by PMT + for the PAT and PMT */
171 };
172 
173 #define MPEGTS_OPTIONS \
174  { "resync_size", "set size limit for looking up a new synchronization", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
175 
176 static const AVOption options[] = {
178  {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
179  {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
180  {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
182  {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
183  {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
184  {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
185  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
186  {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
187  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
188  {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
189  {.i64 = 0}, 0, 1, 0 },
190  {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
191  {.i64 = 0}, 0, 1, 0 },
192  { NULL },
193 };
194 
195 static const AVClass mpegts_class = {
196  .class_name = "mpegts demuxer",
197  .item_name = av_default_item_name,
198  .option = options,
199  .version = LIBAVUTIL_VERSION_INT,
200 };
201 
202 static const AVOption raw_options[] = {
204  { "compute_pcr", "compute exact PCR for each transport stream packet",
205  offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
206  { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
207  { "ts_packetsize", "output option carrying the raw packet size",
208  offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
209  { .i64 = 0 }, 0, 0,
211  { NULL },
212 };
213 
214 static const AVClass mpegtsraw_class = {
215  .class_name = "mpegtsraw demuxer",
216  .item_name = av_default_item_name,
217  .option = raw_options,
218  .version = LIBAVUTIL_VERSION_INT,
219 };
220 
221 /* TS stream handling */
222 
229 };
230 
231 /* enough for PES header + length */
232 #define PES_START_SIZE 6
233 #define PES_HEADER_SIZE 9
234 #define MAX_PES_HEADER_SIZE (9 + 255)
235 
236 typedef struct PESContext {
237  int pid;
238  int pcr_pid; /**< if -1 then all packets containing PCR are considered */
243  AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
245  /* used to get the format */
247  int flags; /**< copied to the AVPacket flags */
252  int64_t pts, dts;
253  int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
258 } PESContext;
259 
261 
262 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
263 {
264  int i;
265  for (i = 0; i < ts->nb_prg; i++) {
266  if (ts->prg[i].id == programid) {
267  return &ts->prg[i];
268  }
269  }
270  return NULL;
271 }
272 
273 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
274 {
275  AVProgram *prg = NULL;
276  int i;
277 
278  for (i = 0; i < ts->stream->nb_programs; i++)
279  if (ts->stream->programs[i]->id == programid) {
280  prg = ts->stream->programs[i];
281  break;
282  }
283  if (!prg)
284  return;
285  prg->nb_stream_indexes = 0;
286 }
287 
288 static void clear_program(MpegTSContext *ts, unsigned int programid)
289 {
290  int i;
291 
292  clear_avprogram(ts, programid);
293  for (i = 0; i < ts->nb_prg; i++)
294  if (ts->prg[i].id == programid) {
295  ts->prg[i].nb_pids = 0;
296  ts->prg[i].pmt_found = 0;
297  }
298 }
299 
301 {
302  av_freep(&ts->prg);
303  ts->nb_prg = 0;
304 }
305 
306 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
307 {
308  struct Program *p;
309  if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
310  ts->nb_prg = 0;
311  return;
312  }
313  p = &ts->prg[ts->nb_prg];
314  p->id = programid;
315  p->nb_pids = 0;
316  p->pmt_found = 0;
317  ts->nb_prg++;
318 }
319 
320 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
321  unsigned int pid)
322 {
323  struct Program *p = get_program(ts, programid);
324  int i;
325  if (!p)
326  return;
327 
328  if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
329  return;
330 
331  for (i = 0; i < p->nb_pids; i++)
332  if (p->pids[i] == pid)
333  return;
334 
335  p->pids[p->nb_pids++] = pid;
336 }
337 
338 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
339 {
340  struct Program *p = get_program(ts, programid);
341  if (!p)
342  return;
343 
344  p->pmt_found = 1;
345 }
346 
347 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
348  unsigned int pid, int version)
349 {
350  int i;
351  for (i = 0; i < s->nb_programs; i++) {
352  AVProgram *program = s->programs[i];
353  if (program->id == programid) {
354  int old_pcr_pid = program->pcr_pid,
355  old_version = program->pmt_version;
356  program->pcr_pid = pid;
357  program->pmt_version = version;
358 
359  if (old_version != -1 && old_version != version) {
361  "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
362  programid, old_version, version, old_pcr_pid, pid);
363  }
364  break;
365  }
366  }
367 }
368 
369 /**
370  * @brief discard_pid() decides if the pid is to be discarded according
371  * to caller's programs selection
372  * @param ts : - TS context
373  * @param pid : - pid
374  * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
375  * 0 otherwise
376  */
377 static int discard_pid(MpegTSContext *ts, unsigned int pid)
378 {
379  int i, j, k;
380  int used = 0, discarded = 0;
381  struct Program *p;
382 
383  /* If none of the programs have .discard=AVDISCARD_ALL then there's
384  * no way we have to discard this packet */
385  for (k = 0; k < ts->stream->nb_programs; k++)
386  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
387  break;
388  if (k == ts->stream->nb_programs)
389  return 0;
390 
391  for (i = 0; i < ts->nb_prg; i++) {
392  p = &ts->prg[i];
393  for (j = 0; j < p->nb_pids; j++) {
394  if (p->pids[j] != pid)
395  continue;
396  // is program with id p->id set to be discarded?
397  for (k = 0; k < ts->stream->nb_programs; k++) {
398  if (ts->stream->programs[k]->id == p->id) {
399  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
400  discarded++;
401  else
402  used++;
403  }
404  }
405  }
406  }
407 
408  return !used && discarded;
409 }
410 
411 /**
412  * Assemble PES packets out of TS packets, and then call the "section_cb"
413  * function when they are complete.
414  */
416  const uint8_t *buf, int buf_size, int is_start)
417 {
418  MpegTSSectionFilter *tss = &tss1->u.section_filter;
419  uint8_t *cur_section_buf = NULL;
420  int len, offset;
421 
422  if (is_start) {
423  memcpy(tss->section_buf, buf, buf_size);
424  tss->section_index = buf_size;
425  tss->section_h_size = -1;
426  tss->end_of_section_reached = 0;
427  } else {
428  if (tss->end_of_section_reached)
429  return;
430  len = MAX_SECTION_SIZE - tss->section_index;
431  if (buf_size < len)
432  len = buf_size;
433  memcpy(tss->section_buf + tss->section_index, buf, len);
434  tss->section_index += len;
435  }
436 
437  offset = 0;
438  cur_section_buf = tss->section_buf;
439  while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
440  /* compute section length if possible */
441  if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
442  len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
443  if (len > MAX_SECTION_SIZE)
444  return;
445  tss->section_h_size = len;
446  }
447 
448  if (tss->section_h_size != -1 &&
449  tss->section_index >= offset + tss->section_h_size) {
450  int crc_valid = 1;
451  tss->end_of_section_reached = 1;
452 
453  if (tss->check_crc) {
454  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
455  if (tss->section_h_size >= 4)
456  tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
457 
458  if (crc_valid) {
459  ts->crc_validity[ tss1->pid ] = 100;
460  }else if (ts->crc_validity[ tss1->pid ] > -10) {
461  ts->crc_validity[ tss1->pid ]--;
462  }else
463  crc_valid = 2;
464  }
465  if (crc_valid) {
466  tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
467  if (crc_valid != 1)
468  tss->last_ver = -1;
469  }
470 
471  cur_section_buf += tss->section_h_size;
472  offset += tss->section_h_size;
473  tss->section_h_size = -1;
474  } else {
475  tss->section_h_size = -1;
476  tss->end_of_section_reached = 0;
477  break;
478  }
479  }
480 }
481 
482 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
483  enum MpegTSFilterType type)
484 {
486 
487  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
488 
489  if (pid >= NB_PID_MAX || ts->pids[pid])
490  return NULL;
491  filter = av_mallocz(sizeof(MpegTSFilter));
492  if (!filter)
493  return NULL;
494  ts->pids[pid] = filter;
495 
496  filter->type = type;
497  filter->pid = pid;
498  filter->es_id = -1;
499  filter->last_cc = -1;
500  filter->last_pcr= -1;
501 
502  return filter;
503 }
504 
506  unsigned int pid,
507  SectionCallback *section_cb,
508  void *opaque,
509  int check_crc)
510 {
512  MpegTSSectionFilter *sec;
513 
514  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
515  return NULL;
516  sec = &filter->u.section_filter;
517  sec->section_cb = section_cb;
518  sec->opaque = opaque;
520  sec->check_crc = check_crc;
521  sec->last_ver = -1;
522 
523  if (!sec->section_buf) {
524  av_free(filter);
525  return NULL;
526  }
527  return filter;
528 }
529 
530 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
532  void *opaque)
533 {
535  MpegTSPESFilter *pes;
536 
537  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
538  return NULL;
539 
540  pes = &filter->u.pes_filter;
541  pes->pes_cb = pes_cb;
542  pes->opaque = opaque;
543  return filter;
544 }
545 
546 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
547 {
548  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
549 }
550 
552 {
553  int pid;
554 
555  pid = filter->pid;
556  if (filter->type == MPEGTS_SECTION)
558  else if (filter->type == MPEGTS_PES) {
559  PESContext *pes = filter->u.pes_filter.opaque;
560  av_buffer_unref(&pes->buffer);
561  /* referenced private data will be freed later in
562  * avformat_close_input (pes->st->priv_data == pes) */
563  if (!pes->st || pes->merged_st) {
564  av_freep(&filter->u.pes_filter.opaque);
565  }
566  }
567 
568  av_free(filter);
569  ts->pids[pid] = NULL;
570 }
571 
572 static int analyze(const uint8_t *buf, int size, int packet_size,
573  int probe)
574 {
575  int stat[TS_MAX_PACKET_SIZE];
576  int stat_all = 0;
577  int i;
578  int best_score = 0;
579 
580  memset(stat, 0, packet_size * sizeof(*stat));
581 
582  for (i = 0; i < size - 3; i++) {
583  if (buf[i] == 0x47) {
584  int pid = AV_RB16(buf+1) & 0x1FFF;
585  int asc = buf[i + 3] & 0x30;
586  if (!probe || pid == 0x1FFF || asc) {
587  int x = i % packet_size;
588  stat[x]++;
589  stat_all++;
590  if (stat[x] > best_score) {
591  best_score = stat[x];
592  }
593  }
594  }
595  }
596 
597  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
598 }
599 
600 /* autodetect fec presence */
602 {
603  int score, fec_score, dvhs_score;
604  int margin;
605  int ret;
606 
607  /*init buffer to store stream for probing */
609  int buf_size = 0;
610 
611  while (buf_size < PROBE_PACKET_MAX_BUF) {
612  ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
613  if (ret < 0)
614  return AVERROR_INVALIDDATA;
615  buf_size += ret;
616 
617  score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
618  dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
619  fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
620  av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
621  buf_size, score, dvhs_score, fec_score);
622 
623  margin = mid_pred(score, fec_score, dvhs_score);
624 
625  if (buf_size < PROBE_PACKET_MAX_BUF)
626  margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
627 
628  if (score > margin)
629  return TS_PACKET_SIZE;
630  else if (dvhs_score > margin)
631  return TS_DVHS_PACKET_SIZE;
632  else if (fec_score > margin)
633  return TS_FEC_PACKET_SIZE;
634  }
635  return AVERROR_INVALIDDATA;
636 }
637 
638 typedef struct SectionHeader {
640  uint16_t id;
644 } SectionHeader;
645 
647 {
648  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
649  return 1;
650 
651  tssf->last_ver = h->version;
652  tssf->last_crc = tssf->crc;
653 
654  return 0;
655 }
656 
657 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
658 {
659  const uint8_t *p;
660  int c;
661 
662  p = *pp;
663  if (p >= p_end)
664  return AVERROR_INVALIDDATA;
665  c = *p++;
666  *pp = p;
667  return c;
668 }
669 
670 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
671 {
672  const uint8_t *p;
673  int c;
674 
675  p = *pp;
676  if (1 >= p_end - p)
677  return AVERROR_INVALIDDATA;
678  c = AV_RB16(p);
679  p += 2;
680  *pp = p;
681  return c;
682 }
683 
684 /* read and allocate a DVB string preceded by its length */
685 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
686 {
687  int len;
688  const uint8_t *p;
689  char *str;
690 
691  p = *pp;
692  len = get8(&p, p_end);
693  if (len < 0)
694  return NULL;
695  if (len > p_end - p)
696  return NULL;
697 #if CONFIG_ICONV
698  if (len) {
699  const char *encodings[] = {
700  "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
701  "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
702  "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
703  "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
704  "", "", "", "", "", "", "", ""
705  };
706  iconv_t cd;
707  char *in, *out;
708  size_t inlen = len, outlen = inlen * 6 + 1;
709  if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
710  char iso8859[12];
711  snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
712  inlen -= 3;
713  in = (char *)p + 3;
714  cd = iconv_open("UTF-8", iso8859);
715  } else if (p[0] < 0x20) {
716  inlen -= 1;
717  in = (char *)p + 1;
718  cd = iconv_open("UTF-8", encodings[*p]);
719  } else {
720  in = (char *)p;
721  cd = iconv_open("UTF-8", encodings[0]);
722  }
723  if (cd == (iconv_t)-1)
724  goto no_iconv;
725  str = out = av_malloc(outlen);
726  if (!str) {
727  iconv_close(cd);
728  return NULL;
729  }
730  if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
731  iconv_close(cd);
732  av_freep(&str);
733  goto no_iconv;
734  }
735  iconv_close(cd);
736  *out = 0;
737  *pp = p + len;
738  return str;
739  }
740 no_iconv:
741 #endif
742  str = av_malloc(len + 1);
743  if (!str)
744  return NULL;
745  memcpy(str, p, len);
746  str[len] = '\0';
747  p += len;
748  *pp = p;
749  return str;
750 }
751 
753  const uint8_t **pp, const uint8_t *p_end)
754 {
755  int val;
756 
757  val = get8(pp, p_end);
758  if (val < 0)
759  return val;
760  h->tid = val;
761  *pp += 2;
762  val = get16(pp, p_end);
763  if (val < 0)
764  return val;
765  h->id = val;
766  val = get8(pp, p_end);
767  if (val < 0)
768  return val;
769  h->version = (val >> 1) & 0x1f;
770  val = get8(pp, p_end);
771  if (val < 0)
772  return val;
773  h->sec_num = val;
774  val = get8(pp, p_end);
775  if (val < 0)
776  return val;
777  h->last_sec_num = val;
778  return 0;
779 }
780 
781 typedef struct StreamType {
782  uint32_t stream_type;
785 } StreamType;
786 
787 static const StreamType ISO_types[] = {
789  { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
791  { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
794  /* Makito encoder sets stream type 0x11 for AAC,
795  * so auto-detect LOAS/LATM instead of hardcoding it. */
796 #if !CONFIG_LOAS_DEMUXER
797  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
798 #endif
800  { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
801  { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
807  { 0 },
808 };
809 
810 static const StreamType HDMV_types[] = {
816  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
817  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
818  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
819  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
822  { 0 },
823 };
824 
825 /* SCTE types */
826 static const StreamType SCTE_types[] = {
828  { 0 },
829 };
830 
831 /* ATSC ? */
832 static const StreamType MISC_types[] = {
835  { 0 },
836 };
837 
838 static const StreamType REGD_types[] = {
839  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
840  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
841  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
842  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
843  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
844  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
845  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
846  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
847  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
848  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
849  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
850  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
851  { 0 },
852 };
853 
854 static const StreamType METADATA_types[] = {
855  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
856  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
857  { 0 },
858 };
859 
860 /* descriptor present */
861 static const StreamType DESC_types[] = {
862  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
863  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
866  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
867  { 0 },
868 };
869 
871  uint32_t stream_type,
872  const StreamType *types)
873 {
874  for (; types->stream_type; types++)
875  if (stream_type == types->stream_type) {
876  if (st->codecpar->codec_type != types->codec_type ||
877  st->codecpar->codec_id != types->codec_id) {
878  st->codecpar->codec_type = types->codec_type;
879  st->codecpar->codec_id = types->codec_id;
880  st->internal->need_context_update = 1;
881  }
882  st->request_probe = 0;
883  return;
884  }
885 }
886 
888  uint32_t stream_type, uint32_t prog_reg_desc)
889 {
890  int old_codec_type = st->codecpar->codec_type;
891  int old_codec_id = st->codecpar->codec_id;
892  int old_codec_tag = st->codecpar->codec_tag;
893 
894  if (avcodec_is_open(st->internal->avctx)) {
895  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
896  return 0;
897  }
898 
899  avpriv_set_pts_info(st, 33, 1, 90000);
900  st->priv_data = pes;
904  pes->st = st;
905  pes->stream_type = stream_type;
906 
907  av_log(pes->stream, AV_LOG_DEBUG,
908  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
909  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
910 
911  st->codecpar->codec_tag = pes->stream_type;
912 
913  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
914  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
915  st->request_probe = 50;
916  if ((prog_reg_desc == AV_RL32("HDMV") ||
917  prog_reg_desc == AV_RL32("HDPR")) &&
919  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
920  if (pes->stream_type == 0x83) {
921  // HDMV TrueHD streams also contain an AC3 coded version of the
922  // audio track - add a second stream for this
923  AVStream *sub_st;
924  // priv_data cannot be shared between streams
925  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
926  if (!sub_pes)
927  return AVERROR(ENOMEM);
928  memcpy(sub_pes, pes, sizeof(*sub_pes));
929 
930  sub_st = avformat_new_stream(pes->stream, NULL);
931  if (!sub_st) {
932  av_free(sub_pes);
933  return AVERROR(ENOMEM);
934  }
935 
936  sub_st->id = pes->pid;
937  avpriv_set_pts_info(sub_st, 33, 1, 90000);
938  sub_st->priv_data = sub_pes;
940  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
942  sub_pes->sub_st = pes->sub_st = sub_st;
943  }
944  }
945  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
946  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
947  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
948  st->codecpar->codec_id = old_codec_id;
949  st->codecpar->codec_type = old_codec_type;
950  }
951  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
952  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
953  st->probe_packets > 0 &&
954  stream_type == STREAM_TYPE_PRIVATE_DATA) {
958  }
959 
960  /* queue a context update if properties changed */
961  if (old_codec_type != st->codecpar->codec_type ||
962  old_codec_id != st->codecpar->codec_id ||
963  old_codec_tag != st->codecpar->codec_tag)
964  st->internal->need_context_update = 1;
965 
966  return 0;
967 }
968 
970 {
971  pes->pts = AV_NOPTS_VALUE;
972  pes->dts = AV_NOPTS_VALUE;
973  pes->data_index = 0;
974  pes->flags = 0;
975  av_buffer_unref(&pes->buffer);
976 }
977 
978 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
979 {
980  av_init_packet(pkt);
981  pkt->data = (uint8_t *)buffer;
982  pkt->size = len;
983 }
984 
986 {
987  uint8_t *sd;
988 
989  av_init_packet(pkt);
990 
991  pkt->buf = pes->buffer;
992  pkt->data = pes->buffer->data;
993  pkt->size = pes->data_index;
994 
995  if (pes->total_size != MAX_PES_PAYLOAD &&
996  pes->pes_header_size + pes->data_index != pes->total_size +
997  PES_START_SIZE) {
998  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
999  pes->flags |= AV_PKT_FLAG_CORRUPT;
1000  }
1001  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1002 
1003  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1004  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1005  pkt->stream_index = pes->sub_st->index;
1006  else
1007  pkt->stream_index = pes->st->index;
1008  pkt->pts = pes->pts;
1009  pkt->dts = pes->dts;
1010  /* store position of first TS packet of this PES packet */
1011  pkt->pos = pes->ts_packet_pos;
1012  pkt->flags = pes->flags;
1013 
1014  pes->buffer = NULL;
1016 
1018  if (!sd)
1019  return AVERROR(ENOMEM);
1020  *sd = pes->stream_id;
1021 
1022  return 0;
1023 }
1024 
1025 static uint64_t get_ts64(GetBitContext *gb, int bits)
1026 {
1027  if (get_bits_left(gb) < bits)
1028  return AV_NOPTS_VALUE;
1029  return get_bits64(gb, bits);
1030 }
1031 
1033  const uint8_t *buf, int buf_size)
1034 {
1035  GetBitContext gb;
1036  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1037  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1038  int dts_flag = -1, cts_flag = -1;
1039  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1040  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1041  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1042 
1043  memcpy(buf_padded, buf, buf_padded_size);
1044 
1045  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1046 
1047  if (sl->use_au_start)
1048  au_start_flag = get_bits1(&gb);
1049  if (sl->use_au_end)
1050  au_end_flag = get_bits1(&gb);
1051  if (!sl->use_au_start && !sl->use_au_end)
1052  au_start_flag = au_end_flag = 1;
1053  if (sl->ocr_len > 0)
1054  ocr_flag = get_bits1(&gb);
1055  if (sl->use_idle)
1056  idle_flag = get_bits1(&gb);
1057  if (sl->use_padding)
1058  padding_flag = get_bits1(&gb);
1059  if (padding_flag)
1060  padding_bits = get_bits(&gb, 3);
1061 
1062  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1063  if (sl->packet_seq_num_len)
1065  if (sl->degr_prior_len)
1066  if (get_bits1(&gb))
1067  skip_bits(&gb, sl->degr_prior_len);
1068  if (ocr_flag)
1069  skip_bits_long(&gb, sl->ocr_len);
1070  if (au_start_flag) {
1071  if (sl->use_rand_acc_pt)
1072  get_bits1(&gb);
1073  if (sl->au_seq_num_len > 0)
1074  skip_bits_long(&gb, sl->au_seq_num_len);
1075  if (sl->use_timestamps) {
1076  dts_flag = get_bits1(&gb);
1077  cts_flag = get_bits1(&gb);
1078  }
1079  }
1080  if (sl->inst_bitrate_len)
1081  inst_bitrate_flag = get_bits1(&gb);
1082  if (dts_flag == 1)
1083  dts = get_ts64(&gb, sl->timestamp_len);
1084  if (cts_flag == 1)
1085  cts = get_ts64(&gb, sl->timestamp_len);
1086  if (sl->au_len > 0)
1087  skip_bits_long(&gb, sl->au_len);
1088  if (inst_bitrate_flag)
1089  skip_bits_long(&gb, sl->inst_bitrate_len);
1090  }
1091 
1092  if (dts != AV_NOPTS_VALUE)
1093  pes->dts = dts;
1094  if (cts != AV_NOPTS_VALUE)
1095  pes->pts = cts;
1096 
1097  if (sl->timestamp_len && sl->timestamp_res)
1099 
1100  return (get_bits_count(&gb) + 7) >> 3;
1101 }
1102 
1103 /* return non zero if a packet could be constructed */
1105  const uint8_t *buf, int buf_size, int is_start,
1106  int64_t pos)
1107 {
1108  PESContext *pes = filter->u.pes_filter.opaque;
1109  MpegTSContext *ts = pes->ts;
1110  const uint8_t *p;
1111  int ret, len, code;
1112 
1113  if (!ts->pkt)
1114  return 0;
1115 
1116  if (is_start) {
1117  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1118  ret = new_pes_packet(pes, ts->pkt);
1119  if (ret < 0)
1120  return ret;
1121  ts->stop_parse = 1;
1122  } else {
1124  }
1125  pes->state = MPEGTS_HEADER;
1126  pes->ts_packet_pos = pos;
1127  }
1128  p = buf;
1129  while (buf_size > 0) {
1130  switch (pes->state) {
1131  case MPEGTS_HEADER:
1132  len = PES_START_SIZE - pes->data_index;
1133  if (len > buf_size)
1134  len = buf_size;
1135  memcpy(pes->header + pes->data_index, p, len);
1136  pes->data_index += len;
1137  p += len;
1138  buf_size -= len;
1139  if (pes->data_index == PES_START_SIZE) {
1140  /* we got all the PES or section header. We can now
1141  * decide */
1142  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1143  pes->header[2] == 0x01) {
1144  /* it must be an MPEG-2 PES stream */
1145  code = pes->header[3] | 0x100;
1146  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1147  code);
1148  pes->stream_id = pes->header[3];
1149 
1150  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1151  (!pes->sub_st ||
1152  pes->sub_st->discard == AVDISCARD_ALL)) ||
1153  code == 0x1be) /* padding_stream */
1154  goto skip;
1155 
1156  /* stream not present in PMT */
1157  if (!pes->st) {
1158  if (ts->skip_changes)
1159  goto skip;
1160  if (ts->merge_pmt_versions)
1161  goto skip; /* wait for PMT to merge new stream */
1162 
1163  pes->st = avformat_new_stream(ts->stream, NULL);
1164  if (!pes->st)
1165  return AVERROR(ENOMEM);
1166  pes->st->id = pes->pid;
1167  mpegts_set_stream_info(pes->st, pes, 0, 0);
1168  }
1169 
1170  pes->total_size = AV_RB16(pes->header + 4);
1171  /* NOTE: a zero total size means the PES size is
1172  * unbounded */
1173  if (!pes->total_size)
1174  pes->total_size = MAX_PES_PAYLOAD;
1175 
1176  /* allocate pes buffer */
1177  pes->buffer = av_buffer_alloc(pes->total_size +
1179  if (!pes->buffer)
1180  return AVERROR(ENOMEM);
1181 
1182  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1183  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1184  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1185  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1186  pes->state = MPEGTS_PESHEADER;
1187  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1188  av_log(pes->stream, AV_LOG_TRACE,
1189  "pid=%x stream_type=%x probing\n",
1190  pes->pid,
1191  pes->stream_type);
1192  pes->st->request_probe = 1;
1193  }
1194  } else {
1195  pes->pes_header_size = 6;
1196  pes->state = MPEGTS_PAYLOAD;
1197  pes->data_index = 0;
1198  }
1199  } else {
1200  /* otherwise, it should be a table */
1201  /* skip packet */
1202 skip:
1203  pes->state = MPEGTS_SKIP;
1204  continue;
1205  }
1206  }
1207  break;
1208  /**********************************************/
1209  /* PES packing parsing */
1210  case MPEGTS_PESHEADER:
1211  len = PES_HEADER_SIZE - pes->data_index;
1212  if (len < 0)
1213  return AVERROR_INVALIDDATA;
1214  if (len > buf_size)
1215  len = buf_size;
1216  memcpy(pes->header + pes->data_index, p, len);
1217  pes->data_index += len;
1218  p += len;
1219  buf_size -= len;
1220  if (pes->data_index == PES_HEADER_SIZE) {
1221  pes->pes_header_size = pes->header[8] + 9;
1223  }
1224  break;
1225  case MPEGTS_PESHEADER_FILL:
1226  len = pes->pes_header_size - pes->data_index;
1227  if (len < 0)
1228  return AVERROR_INVALIDDATA;
1229  if (len > buf_size)
1230  len = buf_size;
1231  memcpy(pes->header + pes->data_index, p, len);
1232  pes->data_index += len;
1233  p += len;
1234  buf_size -= len;
1235  if (pes->data_index == pes->pes_header_size) {
1236  const uint8_t *r;
1237  unsigned int flags, pes_ext, skip;
1238 
1239  flags = pes->header[7];
1240  r = pes->header + 9;
1241  pes->pts = AV_NOPTS_VALUE;
1242  pes->dts = AV_NOPTS_VALUE;
1243  if ((flags & 0xc0) == 0x80) {
1244  pes->dts = pes->pts = ff_parse_pes_pts(r);
1245  r += 5;
1246  } else if ((flags & 0xc0) == 0xc0) {
1247  pes->pts = ff_parse_pes_pts(r);
1248  r += 5;
1249  pes->dts = ff_parse_pes_pts(r);
1250  r += 5;
1251  }
1252  pes->extended_stream_id = -1;
1253  if (flags & 0x01) { /* PES extension */
1254  pes_ext = *r++;
1255  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1256  skip = (pes_ext >> 4) & 0xb;
1257  skip += skip & 0x9;
1258  r += skip;
1259  if ((pes_ext & 0x41) == 0x01 &&
1260  (r + 2) <= (pes->header + pes->pes_header_size)) {
1261  /* PES extension 2 */
1262  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1263  pes->extended_stream_id = r[1];
1264  }
1265  }
1266 
1267  /* we got the full header. We parse it and get the payload */
1268  pes->state = MPEGTS_PAYLOAD;
1269  pes->data_index = 0;
1270  if (pes->stream_type == 0x12 && buf_size > 0) {
1271  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1272  buf_size);
1273  pes->pes_header_size += sl_header_bytes;
1274  p += sl_header_bytes;
1275  buf_size -= sl_header_bytes;
1276  }
1277  if (pes->stream_type == 0x15 && buf_size >= 5) {
1278  /* skip metadata access unit header */
1279  pes->pes_header_size += 5;
1280  p += 5;
1281  buf_size -= 5;
1282  }
1283  if ( pes->ts->fix_teletext_pts
1286  ) {
1287  AVProgram *p = NULL;
1288  int pcr_found = 0;
1289  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1290  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1291  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1292  if (f) {
1293  AVStream *st = NULL;
1294  if (f->type == MPEGTS_PES) {
1295  PESContext *pcrpes = f->u.pes_filter.opaque;
1296  if (pcrpes)
1297  st = pcrpes->st;
1298  } else if (f->type == MPEGTS_PCR) {
1299  int i;
1300  for (i = 0; i < p->nb_stream_indexes; i++) {
1301  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1302  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1303  st = pst;
1304  }
1305  }
1306  if (f->last_pcr != -1 && !f->discard) {
1307  // teletext packets do not always have correct timestamps,
1308  // the standard says they should be handled after 40.6 ms at most,
1309  // and the pcr error to this packet should be no more than 100 ms.
1310  // TODO: we should interpolate the PCR, not just use the last one
1311  int64_t pcr = f->last_pcr / 300;
1312  pcr_found = 1;
1313  if (st) {
1316  }
1317  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1318  pes->pts = pes->dts = pcr;
1319  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1320  pes->dts > pcr + 3654 + 9000) {
1321  pes->pts = pes->dts = pcr + 3654 + 9000;
1322  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1323  pes->dts > pcr + 10*90000) { //10sec
1324  pes->pts = pes->dts = pcr + 3654 + 9000;
1325  }
1326  break;
1327  }
1328  }
1329  }
1330  }
1331 
1332  if (!pcr_found) {
1334  "Forcing DTS/PTS to be unset for a "
1335  "non-trustworthy PES packet for PID %d as "
1336  "PCR hasn't been received yet.\n",
1337  pes->pid);
1338  pes->dts = pes->pts = AV_NOPTS_VALUE;
1339  }
1340  }
1341  }
1342  break;
1343  case MPEGTS_PAYLOAD:
1344  if (pes->buffer) {
1345  if (pes->data_index > 0 &&
1346  pes->data_index + buf_size > pes->total_size) {
1347  ret = new_pes_packet(pes, ts->pkt);
1348  if (ret < 0)
1349  return ret;
1350  pes->total_size = MAX_PES_PAYLOAD;
1351  pes->buffer = av_buffer_alloc(pes->total_size +
1353  if (!pes->buffer)
1354  return AVERROR(ENOMEM);
1355  ts->stop_parse = 1;
1356  } else if (pes->data_index == 0 &&
1357  buf_size > pes->total_size) {
1358  // pes packet size is < ts size packet and pes data is padded with 0xff
1359  // not sure if this is legal in ts but see issue #2392
1360  buf_size = pes->total_size;
1361  }
1362  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1363  pes->data_index += buf_size;
1364  /* emit complete packets with known packet size
1365  * decreases demuxer delay for infrequent packets like subtitles from
1366  * a couple of seconds to milliseconds for properly muxed files.
1367  * total_size is the number of bytes following pes_packet_length
1368  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1369  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1370  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1371  ts->stop_parse = 1;
1372  ret = new_pes_packet(pes, ts->pkt);
1373  if (ret < 0)
1374  return ret;
1375  }
1376  }
1377  buf_size = 0;
1378  break;
1379  case MPEGTS_SKIP:
1380  buf_size = 0;
1381  break;
1382  }
1383  }
1384 
1385  return 0;
1386 }
1387 
1388 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1389 {
1390  MpegTSFilter *tss;
1391  PESContext *pes;
1392 
1393  /* if no pid found, then add a pid context */
1394  pes = av_mallocz(sizeof(PESContext));
1395  if (!pes)
1396  return 0;
1397  pes->ts = ts;
1398  pes->stream = ts->stream;
1399  pes->pid = pid;
1400  pes->pcr_pid = pcr_pid;
1401  pes->state = MPEGTS_SKIP;
1402  pes->pts = AV_NOPTS_VALUE;
1403  pes->dts = AV_NOPTS_VALUE;
1404  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1405  if (!tss) {
1406  av_free(pes);
1407  return 0;
1408  }
1409  return pes;
1410 }
1411 
1412 #define MAX_LEVEL 4
1413 typedef struct MP4DescrParseContext {
1420  int level;
1423 
1425  const uint8_t *buf, unsigned size,
1426  Mp4Descr *descr, int max_descr_count)
1427 {
1428  int ret;
1429  if (size > (1 << 30))
1430  return AVERROR_INVALIDDATA;
1431 
1432  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1433  NULL, NULL, NULL, NULL)) < 0)
1434  return ret;
1435 
1436  d->s = s;
1437  d->level = 0;
1438  d->descr_count = 0;
1439  d->descr = descr;
1440  d->active_descr = NULL;
1441  d->max_descr_count = max_descr_count;
1442 
1443  return 0;
1444 }
1445 
1446 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1447 {
1448  int64_t new_off = avio_tell(pb);
1449  (*len) -= new_off - *off;
1450  *off = new_off;
1451 }
1452 
1453 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1454  int target_tag);
1455 
1456 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1457 {
1458  while (len > 0) {
1459  int ret = parse_mp4_descr(d, off, len, 0);
1460  if (ret < 0)
1461  return ret;
1462  update_offsets(&d->pb, &off, &len);
1463  }
1464  return 0;
1465 }
1466 
1467 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1468 {
1469  avio_rb16(&d->pb); // ID
1470  avio_r8(&d->pb);
1471  avio_r8(&d->pb);
1472  avio_r8(&d->pb);
1473  avio_r8(&d->pb);
1474  avio_r8(&d->pb);
1475  update_offsets(&d->pb, &off, &len);
1476  return parse_mp4_descr_arr(d, off, len);
1477 }
1478 
1479 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1480 {
1481  int id_flags;
1482  if (len < 2)
1483  return 0;
1484  id_flags = avio_rb16(&d->pb);
1485  if (!(id_flags & 0x0020)) { // URL_Flag
1486  update_offsets(&d->pb, &off, &len);
1487  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1488  } else {
1489  return 0;
1490  }
1491 }
1492 
1493 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1494 {
1495  int es_id = 0;
1496  int ret = 0;
1497 
1498  if (d->descr_count >= d->max_descr_count)
1499  return AVERROR_INVALIDDATA;
1500  ff_mp4_parse_es_descr(&d->pb, &es_id);
1501  d->active_descr = d->descr + (d->descr_count++);
1502 
1503  d->active_descr->es_id = es_id;
1504  update_offsets(&d->pb, &off, &len);
1505  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1506  return ret;
1507  update_offsets(&d->pb, &off, &len);
1508  if (len > 0)
1509  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1510  d->active_descr = NULL;
1511  return ret;
1512 }
1513 
1515  int len)
1516 {
1517  Mp4Descr *descr = d->active_descr;
1518  if (!descr)
1519  return AVERROR_INVALIDDATA;
1521  if (!descr->dec_config_descr)
1522  return AVERROR(ENOMEM);
1523  descr->dec_config_descr_len = len;
1524  avio_read(&d->pb, descr->dec_config_descr, len);
1525  return 0;
1526 }
1527 
1528 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1529 {
1530  Mp4Descr *descr = d->active_descr;
1531  int predefined;
1532  if (!descr)
1533  return AVERROR_INVALIDDATA;
1534 
1535 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1536  descr->sl.dst = avio_r8(&d->pb); \
1537  if (descr->sl.dst > maxv) { \
1538  descr->sl.dst = maxv; \
1539  return AVERROR_INVALIDDATA; \
1540  } \
1541 } while (0)
1542 
1543  predefined = avio_r8(&d->pb);
1544  if (!predefined) {
1545  int lengths;
1546  int flags = avio_r8(&d->pb);
1547  descr->sl.use_au_start = !!(flags & 0x80);
1548  descr->sl.use_au_end = !!(flags & 0x40);
1549  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1550  descr->sl.use_padding = !!(flags & 0x08);
1551  descr->sl.use_timestamps = !!(flags & 0x04);
1552  descr->sl.use_idle = !!(flags & 0x02);
1553  descr->sl.timestamp_res = avio_rb32(&d->pb);
1554  avio_rb32(&d->pb);
1555  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1556  R8_CHECK_CLIP_MAX(ocr_len, 63);
1557  R8_CHECK_CLIP_MAX(au_len, 31);
1558  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1559  lengths = avio_rb16(&d->pb);
1560  descr->sl.degr_prior_len = lengths >> 12;
1561  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1562  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1563  } else if (!d->predefined_SLConfigDescriptor_seen){
1564  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1566  }
1567  return 0;
1568 }
1569 
1570 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1571  int target_tag)
1572 {
1573  int tag;
1574  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1575  int ret = 0;
1576 
1577  update_offsets(&d->pb, &off, &len);
1578  if (len < 0 || len1 > len || len1 <= 0) {
1579  av_log(d->s, AV_LOG_ERROR,
1580  "Tag %x length violation new length %d bytes remaining %d\n",
1581  tag, len1, len);
1582  return AVERROR_INVALIDDATA;
1583  }
1584 
1585  if (d->level++ >= MAX_LEVEL) {
1586  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1587  ret = AVERROR_INVALIDDATA;
1588  goto done;
1589  }
1590 
1591  if (target_tag && tag != target_tag) {
1592  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1593  target_tag);
1594  ret = AVERROR_INVALIDDATA;
1595  goto done;
1596  }
1597 
1598  switch (tag) {
1599  case MP4IODescrTag:
1600  ret = parse_MP4IODescrTag(d, off, len1);
1601  break;
1602  case MP4ODescrTag:
1603  ret = parse_MP4ODescrTag(d, off, len1);
1604  break;
1605  case MP4ESDescrTag:
1606  ret = parse_MP4ESDescrTag(d, off, len1);
1607  break;
1608  case MP4DecConfigDescrTag:
1609  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1610  break;
1611  case MP4SLDescrTag:
1612  ret = parse_MP4SLDescrTag(d, off, len1);
1613  break;
1614  }
1615 
1616 
1617 done:
1618  d->level--;
1619  avio_seek(&d->pb, off + len1, SEEK_SET);
1620  return ret;
1621 }
1622 
1623 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1624  Mp4Descr *descr, int *descr_count, int max_descr_count)
1625 {
1627  int ret;
1628 
1629  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1630  if (ret < 0)
1631  return ret;
1632 
1633  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1634 
1635  *descr_count = d.descr_count;
1636  return ret;
1637 }
1638 
1639 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1640  Mp4Descr *descr, int *descr_count, int max_descr_count)
1641 {
1643  int ret;
1644 
1645  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1646  if (ret < 0)
1647  return ret;
1648 
1649  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1650 
1651  *descr_count = d.descr_count;
1652  return ret;
1653 }
1654 
1656  int section_len)
1657 {
1658  MpegTSContext *ts = filter->u.section_filter.opaque;
1659  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1660  SectionHeader h;
1661  const uint8_t *p, *p_end;
1662  AVIOContext pb;
1663  int mp4_descr_count = 0;
1664  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1665  int i, pid;
1666  AVFormatContext *s = ts->stream;
1667 
1668  p_end = section + section_len - 4;
1669  p = section;
1670  if (parse_section_header(&h, &p, p_end) < 0)
1671  return;
1672  if (h.tid != M4OD_TID)
1673  return;
1674  if (skip_identical(&h, tssf))
1675  return;
1676 
1677  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1679 
1680  for (pid = 0; pid < NB_PID_MAX; pid++) {
1681  if (!ts->pids[pid])
1682  continue;
1683  for (i = 0; i < mp4_descr_count; i++) {
1684  PESContext *pes;
1685  AVStream *st;
1686  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1687  continue;
1688  if (ts->pids[pid]->type != MPEGTS_PES) {
1689  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1690  continue;
1691  }
1692  pes = ts->pids[pid]->u.pes_filter.opaque;
1693  st = pes->st;
1694  if (!st)
1695  continue;
1696 
1697  pes->sl = mp4_descr[i].sl;
1698 
1699  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1700  mp4_descr[i].dec_config_descr_len, 0,
1701  NULL, NULL, NULL, NULL);
1702  ff_mp4_read_dec_config_descr(s, st, &pb);
1703  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1704  st->codecpar->extradata_size > 0)
1705  st->need_parsing = 0;
1706  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1707  st->codecpar->extradata_size > 0)
1708  st->need_parsing = 0;
1709 
1711  st->internal->need_context_update = 1;
1712  }
1713  }
1714  for (i = 0; i < mp4_descr_count; i++)
1715  av_free(mp4_descr[i].dec_config_descr);
1716 }
1717 
1719  int section_len)
1720 {
1721  AVProgram *prg = NULL;
1722  MpegTSContext *ts = filter->u.section_filter.opaque;
1723 
1724  int idx = ff_find_stream_index(ts->stream, filter->pid);
1725  if (idx < 0)
1726  return;
1727 
1728  /**
1729  * In case we receive an SCTE-35 packet before mpegts context is fully
1730  * initialized.
1731  */
1732  if (!ts->pkt)
1733  return;
1734 
1735  new_data_packet(section, section_len, ts->pkt);
1736  ts->pkt->stream_index = idx;
1737  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1738  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1739  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1740  if (f && f->last_pcr != -1)
1741  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1742  }
1743  ts->stop_parse = 1;
1744 
1745 }
1746 
1748  1, 0, 1, 1, 2, 2, 2, 3, 3
1749 };
1750 
1751 static const uint8_t opus_stream_cnt[9] = {
1752  1, 1, 1, 2, 2, 3, 4, 4, 5,
1753 };
1754 
1755 static const uint8_t opus_channel_map[8][8] = {
1756  { 0 },
1757  { 0,1 },
1758  { 0,2,1 },
1759  { 0,1,2,3 },
1760  { 0,4,1,2,3 },
1761  { 0,4,1,2,3,5 },
1762  { 0,4,1,2,3,5,6 },
1763  { 0,6,1,2,3,4,5,7 },
1764 };
1765 
1767  const uint8_t **pp, const uint8_t *desc_list_end,
1768  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1769  MpegTSContext *ts)
1770 {
1771  const uint8_t *desc_end;
1772  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1773  char language[252];
1774  int i;
1775 
1776  desc_tag = get8(pp, desc_list_end);
1777  if (desc_tag < 0)
1778  return AVERROR_INVALIDDATA;
1779  desc_len = get8(pp, desc_list_end);
1780  if (desc_len < 0)
1781  return AVERROR_INVALIDDATA;
1782  desc_end = *pp + desc_len;
1783  if (desc_end > desc_list_end)
1784  return AVERROR_INVALIDDATA;
1785 
1786  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1787 
1788  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1789  stream_type == STREAM_TYPE_PRIVATE_DATA)
1790  mpegts_find_stream_type(st, desc_tag, DESC_types);
1791 
1792  switch (desc_tag) {
1793  case 0x02: /* video stream descriptor */
1794  if (get8(pp, desc_end) & 0x1) {
1796  }
1797  break;
1798  case 0x1E: /* SL descriptor */
1799  desc_es_id = get16(pp, desc_end);
1800  if (desc_es_id < 0)
1801  break;
1802  if (ts && ts->pids[pid])
1803  ts->pids[pid]->es_id = desc_es_id;
1804  for (i = 0; i < mp4_descr_count; i++)
1805  if (mp4_descr[i].dec_config_descr_len &&
1806  mp4_descr[i].es_id == desc_es_id) {
1807  AVIOContext pb;
1808  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1809  mp4_descr[i].dec_config_descr_len, 0,
1810  NULL, NULL, NULL, NULL);
1811  ff_mp4_read_dec_config_descr(fc, st, &pb);
1812  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1813  st->codecpar->extradata_size > 0) {
1814  st->need_parsing = 0;
1815  st->internal->need_context_update = 1;
1816  }
1818  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1819  }
1820  break;
1821  case 0x1F: /* FMC descriptor */
1822  if (get16(pp, desc_end) < 0)
1823  break;
1824  if (mp4_descr_count > 0 &&
1826  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1827  st->request_probe > 0) &&
1828  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1829  AVIOContext pb;
1830  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1831  mp4_descr->dec_config_descr_len, 0,
1832  NULL, NULL, NULL, NULL);
1833  ff_mp4_read_dec_config_descr(fc, st, &pb);
1834  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1835  st->codecpar->extradata_size > 0) {
1836  st->request_probe = st->need_parsing = 0;
1838  st->internal->need_context_update = 1;
1839  }
1840  }
1841  break;
1842  case 0x56: /* DVB teletext descriptor */
1843  {
1844  uint8_t *extradata = NULL;
1845  int language_count = desc_len / 5;
1846 
1847  if (desc_len > 0 && desc_len % 5 != 0)
1848  return AVERROR_INVALIDDATA;
1849 
1850  if (language_count > 0) {
1851  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1852  av_assert0(language_count <= sizeof(language) / 4);
1853 
1854  if (st->codecpar->extradata == NULL) {
1855  if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1856  return AVERROR(ENOMEM);
1857  }
1858  }
1859 
1860  if (st->codecpar->extradata_size < language_count * 2)
1861  return AVERROR_INVALIDDATA;
1862 
1863  extradata = st->codecpar->extradata;
1864 
1865  for (i = 0; i < language_count; i++) {
1866  language[i * 4 + 0] = get8(pp, desc_end);
1867  language[i * 4 + 1] = get8(pp, desc_end);
1868  language[i * 4 + 2] = get8(pp, desc_end);
1869  language[i * 4 + 3] = ',';
1870 
1871  memcpy(extradata, *pp, 2);
1872  extradata += 2;
1873 
1874  *pp += 2;
1875  }
1876 
1877  language[i * 4 - 1] = 0;
1878  av_dict_set(&st->metadata, "language", language, 0);
1879  st->internal->need_context_update = 1;
1880  }
1881  }
1882  break;
1883  case 0x59: /* subtitling descriptor */
1884  {
1885  /* 8 bytes per DVB subtitle substream data:
1886  * ISO_639_language_code (3 bytes),
1887  * subtitling_type (1 byte),
1888  * composition_page_id (2 bytes),
1889  * ancillary_page_id (2 bytes) */
1890  int language_count = desc_len / 8;
1891 
1892  if (desc_len > 0 && desc_len % 8 != 0)
1893  return AVERROR_INVALIDDATA;
1894 
1895  if (language_count > 1) {
1896  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1897  }
1898 
1899  if (language_count > 0) {
1900  uint8_t *extradata;
1901 
1902  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1903  av_assert0(language_count <= sizeof(language) / 4);
1904 
1905  if (st->codecpar->extradata == NULL) {
1906  if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1907  return AVERROR(ENOMEM);
1908  }
1909  }
1910 
1911  if (st->codecpar->extradata_size < language_count * 5)
1912  return AVERROR_INVALIDDATA;
1913 
1914  extradata = st->codecpar->extradata;
1915 
1916  for (i = 0; i < language_count; i++) {
1917  language[i * 4 + 0] = get8(pp, desc_end);
1918  language[i * 4 + 1] = get8(pp, desc_end);
1919  language[i * 4 + 2] = get8(pp, desc_end);
1920  language[i * 4 + 3] = ',';
1921 
1922  /* hearing impaired subtitles detection using subtitling_type */
1923  switch (*pp[0]) {
1924  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1925  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1926  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1927  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1928  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1929  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1931  break;
1932  }
1933 
1934  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1935  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1936  extradata += 5;
1937 
1938  *pp += 4;
1939  }
1940 
1941  language[i * 4 - 1] = 0;
1942  av_dict_set(&st->metadata, "language", language, 0);
1943  st->internal->need_context_update = 1;
1944  }
1945  }
1946  break;
1947  case 0x0a: /* ISO 639 language descriptor */
1948  for (i = 0; i + 4 <= desc_len; i += 4) {
1949  language[i + 0] = get8(pp, desc_end);
1950  language[i + 1] = get8(pp, desc_end);
1951  language[i + 2] = get8(pp, desc_end);
1952  language[i + 3] = ',';
1953  switch (get8(pp, desc_end)) {
1954  case 0x01:
1956  break;
1957  case 0x02:
1959  break;
1960  case 0x03:
1963  break;
1964  }
1965  }
1966  if (i && language[0]) {
1967  language[i - 1] = 0;
1968  /* don't overwrite language, as it may already have been set by
1969  * another, more specific descriptor (e.g. supplementary audio) */
1970  av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1971  }
1972  break;
1973  case 0x05: /* registration descriptor */
1974  st->codecpar->codec_tag = bytestream_get_le32(pp);
1975  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1976  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1977  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1978  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1979  st->request_probe = 50;
1980  }
1981  break;
1982  case 0x52: /* stream identifier descriptor */
1983  st->stream_identifier = 1 + get8(pp, desc_end);
1984  break;
1985  case 0x26: /* metadata descriptor */
1986  if (get16(pp, desc_end) == 0xFFFF)
1987  *pp += 4;
1988  if (get8(pp, desc_end) == 0xFF) {
1989  st->codecpar->codec_tag = bytestream_get_le32(pp);
1990  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1991  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1992  }
1993  break;
1994  case 0x7f: /* DVB extension descriptor */
1995  ext_desc_tag = get8(pp, desc_end);
1996  if (ext_desc_tag < 0)
1997  return AVERROR_INVALIDDATA;
1998  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1999  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2000  if (!st->codecpar->extradata) {
2003  if (!st->codecpar->extradata)
2004  return AVERROR(ENOMEM);
2005 
2008 
2009  channel_config_code = get8(pp, desc_end);
2010  if (channel_config_code < 0)
2011  return AVERROR_INVALIDDATA;
2012  if (channel_config_code <= 0x8) {
2013  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2014  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2015  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2016  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2017  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2018  } else {
2019  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2020  }
2022  st->internal->need_context_update = 1;
2023  }
2024  }
2025  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2026  int flags;
2027 
2028  if (desc_len < 1)
2029  return AVERROR_INVALIDDATA;
2030  flags = get8(pp, desc_end);
2031 
2032  if ((flags & 0x80) == 0) /* mix_type */
2034 
2035  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2036  case 0x01:
2039  break;
2040  case 0x02:
2042  break;
2043  case 0x03:
2045  break;
2046  }
2047 
2048  if (flags & 0x01) { /* language_code_present */
2049  if (desc_len < 4)
2050  return AVERROR_INVALIDDATA;
2051  language[0] = get8(pp, desc_end);
2052  language[1] = get8(pp, desc_end);
2053  language[2] = get8(pp, desc_end);
2054  language[3] = 0;
2055 
2056  /* This language always has to override a possible
2057  * ISO 639 language descriptor language */
2058  if (language[0])
2059  av_dict_set(&st->metadata, "language", language, 0);
2060  }
2061  }
2062  break;
2063  case 0x6a: /* ac-3_descriptor */
2064  {
2065  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2066  if (component_type_flag) {
2067  int component_type = get8(pp, desc_end);
2068  int service_type_mask = 0x38; // 0b00111000
2069  int service_type = ((component_type & service_type_mask) >> 3);
2070  if (service_type == 0x02 /* 0b010 */) {
2072  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2073  }
2074  }
2075  }
2076  break;
2077  case 0x7a: /* enhanced_ac-3_descriptor */
2078  {
2079  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2080  if (component_type_flag) {
2081  int component_type = get8(pp, desc_end);
2082  int service_type_mask = 0x38; // 0b00111000
2083  int service_type = ((component_type & service_type_mask) >> 3);
2084  if (service_type == 0x02 /* 0b010 */) {
2086  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2087  }
2088  }
2089  }
2090  break;
2091  case 0xfd: /* ARIB data coding type descriptor */
2092  // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2093  // for captions
2094  if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2095  // This structure is defined in STD-B10, part 1, listing 5.4 and
2096  // part 2, 6.2.20).
2097  // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2098  // Component tag limits are documented in TR-B14, fascicle 2,
2099  // Vol. 3, Section 2, 4.2.8.1
2100  int actual_component_tag = st->stream_identifier - 1;
2101  int picked_profile = FF_PROFILE_UNKNOWN;
2102  int data_component_id = get16(pp, desc_end);
2103  if (data_component_id < 0)
2104  return AVERROR_INVALIDDATA;
2105 
2106  switch (data_component_id) {
2107  case 0x0008:
2108  // [0x30..0x37] are component tags utilized for
2109  // non-mobile captioning service ("profile A").
2110  if (actual_component_tag >= 0x30 &&
2111  actual_component_tag <= 0x37) {
2112  picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2113  }
2114  break;
2115  case 0x0012:
2116  // component tag 0x87 signifies a mobile/partial reception
2117  // (1seg) captioning service ("profile C").
2118  if (actual_component_tag == 0x87) {
2119  picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2120  }
2121  break;
2122  default:
2123  break;
2124  }
2125 
2126  if (picked_profile == FF_PROFILE_UNKNOWN)
2127  break;
2128 
2131  st->codecpar->profile = picked_profile;
2132  st->request_probe = 0;
2133  }
2134  break;
2135  default:
2136  break;
2137  }
2138  *pp = desc_end;
2139  return 0;
2140 }
2141 
2142 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2143  int stream_identifier, int pmt_stream_idx)
2144 {
2145  AVFormatContext *s = ts->stream;
2146  int i;
2147  AVStream *found = NULL;
2148 
2149  for (i = 0; i < s->nb_streams; i++) {
2150  AVStream *st = s->streams[i];
2151  if (st->program_num != programid)
2152  continue;
2153  if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2154  if (st->stream_identifier == stream_identifier+1) {
2155  found = st;
2156  break;
2157  }
2158  } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2159  found = st;
2160  break;
2161  }
2162  }
2163 
2164  if (found) {
2166  "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2168  i, found->id, pid);
2169  }
2170 
2171  return found;
2172 }
2173 
2174 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2175 {
2176  const uint8_t **pp = &p;
2177  const uint8_t *desc_list_end;
2178  const uint8_t *desc_end;
2179  int desc_list_len;
2180  int desc_len, desc_tag;
2181 
2182  desc_list_len = get16(pp, p_end);
2183  if (desc_list_len < 0)
2184  return -1;
2185  desc_list_len &= 0xfff;
2186  desc_list_end = p + desc_list_len;
2187  if (desc_list_end > p_end)
2188  return -1;
2189 
2190  while (1) {
2191  desc_tag = get8(pp, desc_list_end);
2192  if (desc_tag < 0)
2193  return -1;
2194  desc_len = get8(pp, desc_list_end);
2195  if (desc_len < 0)
2196  return -1;
2197  desc_end = *pp + desc_len;
2198  if (desc_end > desc_list_end)
2199  return -1;
2200 
2201  if (desc_tag == 0x52) {
2202  return get8(pp, desc_end);
2203  }
2204  *pp = desc_end;
2205  }
2206 
2207  return -1;
2208 }
2209 
2210 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2211 {
2212  return !(stream_type == 0x13 ||
2213  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2214 }
2215 
2216 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2217 {
2218  MpegTSContext *ts = filter->u.section_filter.opaque;
2219  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2220  SectionHeader h1, *h = &h1;
2221  PESContext *pes;
2222  AVStream *st;
2223  const uint8_t *p, *p_end, *desc_list_end;
2224  int program_info_length, pcr_pid, pid, stream_type;
2225  int desc_list_len;
2226  uint32_t prog_reg_desc = 0; /* registration descriptor */
2227  int stream_identifier = -1;
2228 
2229  int mp4_descr_count = 0;
2230  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2231  int i;
2232 
2233  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2234  hex_dump_debug(ts->stream, section, section_len);
2235 
2236  p_end = section + section_len - 4;
2237  p = section;
2238  if (parse_section_header(h, &p, p_end) < 0)
2239  return;
2240  if (h->tid != PMT_TID)
2241  return;
2242  if (skip_identical(h, tssf))
2243  return;
2244 
2245  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2246  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2247 
2248  if (!ts->scan_all_pmts && ts->skip_changes)
2249  return;
2250 
2251  if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2252  return;
2253  if (!ts->skip_clear)
2254  clear_program(ts, h->id);
2255 
2256  pcr_pid = get16(&p, p_end);
2257  if (pcr_pid < 0)
2258  return;
2259  pcr_pid &= 0x1fff;
2260  add_pid_to_pmt(ts, h->id, pcr_pid);
2261  update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2262 
2263  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2264 
2265  program_info_length = get16(&p, p_end);
2266  if (program_info_length < 0)
2267  return;
2268  program_info_length &= 0xfff;
2269  while (program_info_length >= 2) {
2270  uint8_t tag, len;
2271  tag = get8(&p, p_end);
2272  len = get8(&p, p_end);
2273 
2274  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2275 
2276  if (len > program_info_length - 2)
2277  // something else is broken, exit the program_descriptors_loop
2278  break;
2279  program_info_length -= len + 2;
2280  if (tag == 0x1d) { // IOD descriptor
2281  get8(&p, p_end); // scope
2282  get8(&p, p_end); // label
2283  len -= 2;
2284  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2285  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2286  } else if (tag == 0x05 && len >= 4) { // registration descriptor
2287  prog_reg_desc = bytestream_get_le32(&p);
2288  len -= 4;
2289  }
2290  p += len;
2291  }
2292  p += program_info_length;
2293  if (p >= p_end)
2294  goto out;
2295 
2296  // stop parsing after pmt, we found header
2297  if (!ts->stream->nb_streams)
2298  ts->stop_parse = 2;
2299 
2300  set_pmt_found(ts, h->id);
2301 
2302 
2303  for (i = 0; ; i++) {
2304  st = 0;
2305  pes = NULL;
2306  stream_type = get8(&p, p_end);
2307  if (stream_type < 0)
2308  break;
2309  pid = get16(&p, p_end);
2310  if (pid < 0)
2311  goto out;
2312  pid &= 0x1fff;
2313  if (pid == ts->current_pid)
2314  goto out;
2315 
2316  if (ts->merge_pmt_versions)
2317  stream_identifier = parse_stream_identifier_desc(p, p_end);
2318 
2319  /* now create stream */
2320  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2321  pes = ts->pids[pid]->u.pes_filter.opaque;
2322  if (ts->merge_pmt_versions && !pes->st) {
2323  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2324  if (st) {
2325  pes->st = st;
2326  pes->stream_type = stream_type;
2327  pes->merged_st = 1;
2328  }
2329  }
2330  if (!pes->st) {
2331  pes->st = avformat_new_stream(pes->stream, NULL);
2332  if (!pes->st)
2333  goto out;
2334  pes->st->id = pes->pid;
2335  pes->st->program_num = h->id;
2336  pes->st->pmt_version = h->version;
2337  pes->st->pmt_stream_idx = i;
2338  }
2339  st = pes->st;
2340  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2341  if (ts->pids[pid])
2342  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2343  pes = add_pes_stream(ts, pid, pcr_pid);
2344  if (ts->merge_pmt_versions && pes && !pes->st) {
2345  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2346  if (st) {
2347  pes->st = st;
2348  pes->stream_type = stream_type;
2349  pes->merged_st = 1;
2350  }
2351  }
2352  if (pes && !pes->st) {
2353  st = avformat_new_stream(pes->stream, NULL);
2354  if (!st)
2355  goto out;
2356  st->id = pes->pid;
2357  st->program_num = h->id;
2358  st->pmt_version = h->version;
2359  st->pmt_stream_idx = i;
2360  }
2361  } else {
2362  int idx = ff_find_stream_index(ts->stream, pid);
2363  if (idx >= 0) {
2364  st = ts->stream->streams[idx];
2365  }
2366  if (ts->merge_pmt_versions && !st) {
2367  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2368  }
2369  if (!st) {
2370  st = avformat_new_stream(ts->stream, NULL);
2371  if (!st)
2372  goto out;
2373  st->id = pid;
2374  st->program_num = h->id;
2375  st->pmt_version = h->version;
2376  st->pmt_stream_idx = i;
2378  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2379  mpegts_find_stream_type(st, stream_type, SCTE_types);
2380  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2381  }
2382  }
2383  }
2384 
2385  if (!st)
2386  goto out;
2387 
2388  if (pes && !pes->stream_type)
2389  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2390 
2391  add_pid_to_pmt(ts, h->id, pid);
2392 
2394 
2395  desc_list_len = get16(&p, p_end);
2396  if (desc_list_len < 0)
2397  goto out;
2398  desc_list_len &= 0xfff;
2399  desc_list_end = p + desc_list_len;
2400  if (desc_list_end > p_end)
2401  goto out;
2402  for (;;) {
2403  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2404  desc_list_end, mp4_descr,
2405  mp4_descr_count, pid, ts) < 0)
2406  break;
2407 
2408  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2409  stream_type == 0x83 && pes->sub_st) {
2411  pes->sub_st->index);
2412  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2413  }
2414  }
2415  p = desc_list_end;
2416  }
2417 
2418  if (!ts->pids[pcr_pid])
2419  mpegts_open_pcr_filter(ts, pcr_pid);
2420 
2421 out:
2422  for (i = 0; i < mp4_descr_count; i++)
2423  av_free(mp4_descr[i].dec_config_descr);
2424 }
2425 
2426 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2427 {
2428  MpegTSContext *ts = filter->u.section_filter.opaque;
2429  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2430  SectionHeader h1, *h = &h1;
2431  const uint8_t *p, *p_end;
2432  int sid, pmt_pid;
2433  AVProgram *program;
2434 
2435  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2436  hex_dump_debug(ts->stream, section, section_len);
2437 
2438  p_end = section + section_len - 4;
2439  p = section;
2440  if (parse_section_header(h, &p, p_end) < 0)
2441  return;
2442  if (h->tid != PAT_TID)
2443  return;
2444  if (ts->skip_changes)
2445  return;
2446 
2447  if (skip_identical(h, tssf))
2448  return;
2449  ts->stream->ts_id = h->id;
2450 
2451  clear_programs(ts);
2452  for (;;) {
2453  sid = get16(&p, p_end);
2454  if (sid < 0)
2455  break;
2456  pmt_pid = get16(&p, p_end);
2457  if (pmt_pid < 0)
2458  break;
2459  pmt_pid &= 0x1fff;
2460 
2461  if (pmt_pid == ts->current_pid)
2462  break;
2463 
2464  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2465 
2466  if (sid == 0x0000) {
2467  /* NIT info */
2468  } else {
2469  MpegTSFilter *fil = ts->pids[pmt_pid];
2470  program = av_new_program(ts->stream, sid);
2471  if (program) {
2472  program->program_num = sid;
2473  program->pmt_pid = pmt_pid;
2474  }
2475  if (fil)
2476  if ( fil->type != MPEGTS_SECTION
2477  || fil->pid != pmt_pid
2478  || fil->u.section_filter.section_cb != pmt_cb)
2479  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2480 
2481  if (!ts->pids[pmt_pid])
2482  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2483  add_pat_entry(ts, sid);
2484  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2485  add_pid_to_pmt(ts, sid, pmt_pid);
2486  }
2487  }
2488 
2489  if (sid < 0) {
2490  int i,j;
2491  for (j=0; j<ts->stream->nb_programs; j++) {
2492  for (i = 0; i < ts->nb_prg; i++)
2493  if (ts->prg[i].id == ts->stream->programs[j]->id)
2494  break;
2495  if (i==ts->nb_prg && !ts->skip_clear)
2496  clear_avprogram(ts, ts->stream->programs[j]->id);
2497  }
2498  }
2499 }
2500 
2501 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2502 {
2503  MpegTSContext *ts = filter->u.section_filter.opaque;
2504  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2505  SectionHeader h1, *h = &h1;
2506  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2507  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2508  char *name, *provider_name;
2509 
2510  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2511  hex_dump_debug(ts->stream, section, section_len);
2512 
2513  p_end = section + section_len - 4;
2514  p = section;
2515  if (parse_section_header(h, &p, p_end) < 0)
2516  return;
2517  if (h->tid != SDT_TID)
2518  return;
2519  if (ts->skip_changes)
2520  return;
2521  if (skip_identical(h, tssf))
2522  return;
2523 
2524  onid = get16(&p, p_end);
2525  if (onid < 0)
2526  return;
2527  val = get8(&p, p_end);
2528  if (val < 0)
2529  return;
2530  for (;;) {
2531  sid = get16(&p, p_end);
2532  if (sid < 0)
2533  break;
2534  val = get8(&p, p_end);
2535  if (val < 0)
2536  break;
2537  desc_list_len = get16(&p, p_end);
2538  if (desc_list_len < 0)
2539  break;
2540  desc_list_len &= 0xfff;
2541  desc_list_end = p + desc_list_len;
2542  if (desc_list_end > p_end)
2543  break;
2544  for (;;) {
2545  desc_tag = get8(&p, desc_list_end);
2546  if (desc_tag < 0)
2547  break;
2548  desc_len = get8(&p, desc_list_end);
2549  desc_end = p + desc_len;
2550  if (desc_len < 0 || desc_end > desc_list_end)
2551  break;
2552 
2553  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2554  desc_tag, desc_len);
2555 
2556  switch (desc_tag) {
2557  case 0x48:
2558  service_type = get8(&p, p_end);
2559  if (service_type < 0)
2560  break;
2561  provider_name = getstr8(&p, p_end);
2562  if (!provider_name)
2563  break;
2564  name = getstr8(&p, p_end);
2565  if (name) {
2566  AVProgram *program = av_new_program(ts->stream, sid);
2567  if (program) {
2568  av_dict_set(&program->metadata, "service_name", name, 0);
2569  av_dict_set(&program->metadata, "service_provider",
2570  provider_name, 0);
2571  }
2572  }
2573  av_free(name);
2574  av_free(provider_name);
2575  break;
2576  default:
2577  break;
2578  }
2579  p = desc_end;
2580  }
2581  p = desc_list_end;
2582  }
2583 }
2584 
2585 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2586  const uint8_t *packet);
2587 
2588 /* handle one TS packet */
2589 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2590 {
2591  MpegTSFilter *tss;
2592  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2593  has_adaptation, has_payload;
2594  const uint8_t *p, *p_end;
2595 
2596  pid = AV_RB16(packet + 1) & 0x1fff;
2597  is_start = packet[1] & 0x40;
2598  tss = ts->pids[pid];
2599  if (ts->auto_guess && !tss && is_start) {
2600  add_pes_stream(ts, pid, -1);
2601  tss = ts->pids[pid];
2602  }
2603  if (!tss)
2604  return 0;
2605  if (is_start)
2606  tss->discard = discard_pid(ts, pid);
2607  if (tss->discard)
2608  return 0;
2609  ts->current_pid = pid;
2610 
2611  afc = (packet[3] >> 4) & 3;
2612  if (afc == 0) /* reserved value */
2613  return 0;
2614  has_adaptation = afc & 2;
2615  has_payload = afc & 1;
2616  is_discontinuity = has_adaptation &&
2617  packet[4] != 0 && /* with length > 0 */
2618  (packet[5] & 0x80); /* and discontinuity indicated */
2619 
2620  /* continuity check (currently not used) */
2621  cc = (packet[3] & 0xf);
2622  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2623  cc_ok = pid == 0x1FFF || // null packet PID
2624  is_discontinuity ||
2625  tss->last_cc < 0 ||
2626  expected_cc == cc;
2627 
2628  tss->last_cc = cc;
2629  if (!cc_ok) {
2630  av_log(ts->stream, AV_LOG_DEBUG,
2631  "Continuity check failed for pid %d expected %d got %d\n",
2632  pid, expected_cc, cc);
2633  if (tss->type == MPEGTS_PES) {
2634  PESContext *pc = tss->u.pes_filter.opaque;
2635  pc->flags |= AV_PKT_FLAG_CORRUPT;
2636  }
2637  }
2638 
2639  if (packet[1] & 0x80) {
2640  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2641  if (tss->type == MPEGTS_PES) {
2642  PESContext *pc = tss->u.pes_filter.opaque;
2643  pc->flags |= AV_PKT_FLAG_CORRUPT;
2644  }
2645  }
2646 
2647  p = packet + 4;
2648  if (has_adaptation) {
2649  int64_t pcr_h;
2650  int pcr_l;
2651  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2652  tss->last_pcr = pcr_h * 300 + pcr_l;
2653  /* skip adaptation field */
2654  p += p[0] + 1;
2655  }
2656  /* if past the end of packet, ignore */
2657  p_end = packet + TS_PACKET_SIZE;
2658  if (p >= p_end || !has_payload)
2659  return 0;
2660 
2661  if (pos >= 0) {
2662  av_assert0(pos >= TS_PACKET_SIZE);
2663  ts->pos47_full = pos - TS_PACKET_SIZE;
2664  }
2665 
2666  if (tss->type == MPEGTS_SECTION) {
2667  if (is_start) {
2668  /* pointer field present */
2669  len = *p++;
2670  if (len > p_end - p)
2671  return 0;
2672  if (len && cc_ok) {
2673  /* write remaining section bytes */
2674  write_section_data(ts, tss,
2675  p, len, 0);
2676  /* check whether filter has been closed */
2677  if (!ts->pids[pid])
2678  return 0;
2679  }
2680  p += len;
2681  if (p < p_end) {
2682  write_section_data(ts, tss,
2683  p, p_end - p, 1);
2684  }
2685  } else {
2686  if (cc_ok) {
2687  write_section_data(ts, tss,
2688  p, p_end - p, 0);
2689  }
2690  }
2691 
2692  // stop find_stream_info from waiting for more streams
2693  // when all programs have received a PMT
2694  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2695  int i;
2696  for (i = 0; i < ts->nb_prg; i++) {
2697  if (!ts->prg[i].pmt_found)
2698  break;
2699  }
2700  if (i == ts->nb_prg && ts->nb_prg > 0) {
2701  int types = 0;
2702  for (i = 0; i < ts->stream->nb_streams; i++) {
2703  AVStream *st = ts->stream->streams[i];
2704  if (st->codecpar->codec_type >= 0)
2705  types |= 1<<st->codecpar->codec_type;
2706  }
2707  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2708  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2710  }
2711  }
2712  }
2713 
2714  } else {
2715  int ret;
2716  // Note: The position here points actually behind the current packet.
2717  if (tss->type == MPEGTS_PES) {
2718  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2719  pos - ts->raw_packet_size)) < 0)
2720  return ret;
2721  }
2722  }
2723 
2724  return 0;
2725 }
2726 
2727 static void reanalyze(MpegTSContext *ts) {
2728  AVIOContext *pb = ts->stream->pb;
2729  int64_t pos = avio_tell(pb);
2730  if (pos < 0)
2731  return;
2732  pos -= ts->pos47_full;
2733  if (pos == TS_PACKET_SIZE) {
2734  ts->size_stat[0] ++;
2735  } else if (pos == TS_DVHS_PACKET_SIZE) {
2736  ts->size_stat[1] ++;
2737  } else if (pos == TS_FEC_PACKET_SIZE) {
2738  ts->size_stat[2] ++;
2739  }
2740 
2741  ts->size_stat_count ++;
2743  int newsize = 0;
2744  if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2745  newsize = TS_PACKET_SIZE;
2746  } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2747  newsize = TS_DVHS_PACKET_SIZE;
2748  } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2749  newsize = TS_FEC_PACKET_SIZE;
2750  }
2751  if (newsize && newsize != ts->raw_packet_size) {
2752  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2753  ts->raw_packet_size = newsize;
2754  }
2755  ts->size_stat_count = 0;
2756  memset(ts->size_stat, 0, sizeof(ts->size_stat));
2757  }
2758 }
2759 
2760 /* XXX: try to find a better synchro over several packets (use
2761  * get_packet_size() ?) */
2762 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2763 {
2764  MpegTSContext *ts = s->priv_data;
2765  AVIOContext *pb = s->pb;
2766  int c, i;
2767  uint64_t pos = avio_tell(pb);
2768  int64_t back = FFMIN(seekback, pos);
2769 
2770  //Special case for files like 01c56b0dc1.ts
2771  if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2772  avio_seek(pb, 12 - back, SEEK_CUR);
2773  return 0;
2774  }
2775 
2776  avio_seek(pb, -back, SEEK_CUR);
2777 
2778  for (i = 0; i < ts->resync_size; i++) {
2779  c = avio_r8(pb);
2780  if (avio_feof(pb))
2781  return AVERROR_EOF;
2782  if (c == 0x47) {
2783  avio_seek(pb, -1, SEEK_CUR);
2784  reanalyze(s->priv_data);
2785  return 0;
2786  }
2787  }
2788  av_log(s, AV_LOG_ERROR,
2789  "max resync size reached, could not find sync byte\n");
2790  /* no sync found */
2791  return AVERROR_INVALIDDATA;
2792 }
2793 
2794 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2795 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2796  const uint8_t **data)
2797 {
2798  AVIOContext *pb = s->pb;
2799  int len;
2800 
2801  for (;;) {
2802  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2803  if (len != TS_PACKET_SIZE)
2804  return len < 0 ? len : AVERROR_EOF;
2805  /* check packet sync byte */
2806  if ((*data)[0] != 0x47) {
2807  /* find a new packet start */
2808 
2809  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2810  return AVERROR(EAGAIN);
2811  else
2812  continue;
2813  } else {
2814  break;
2815  }
2816  }
2817  return 0;
2818 }
2819 
2820 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2821 {
2822  AVIOContext *pb = s->pb;
2823  int skip = raw_packet_size - TS_PACKET_SIZE;
2824  if (skip > 0)
2825  avio_skip(pb, skip);
2826 }
2827 
2828 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2829 {
2830  AVFormatContext *s = ts->stream;
2832  const uint8_t *data;
2833  int64_t packet_num;
2834  int ret = 0;
2835 
2836  if (avio_tell(s->pb) != ts->last_pos) {
2837  int i;
2838  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2839  /* seek detected, flush pes buffer */
2840  for (i = 0; i < NB_PID_MAX; i++) {
2841  if (ts->pids[i]) {
2842  if (ts->pids[i]->type == MPEGTS_PES) {
2843  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2844  av_buffer_unref(&pes->buffer);
2845  pes->data_index = 0;
2846  pes->state = MPEGTS_SKIP; /* skip until pes header */
2847  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2848  ts->pids[i]->u.section_filter.last_ver = -1;
2849  }
2850  ts->pids[i]->last_cc = -1;
2851  ts->pids[i]->last_pcr = -1;
2852  }
2853  }
2854  }
2855 
2856  ts->stop_parse = 0;
2857  packet_num = 0;
2858  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2859  for (;;) {
2860  packet_num++;
2861  if (nb_packets != 0 && packet_num >= nb_packets ||
2862  ts->stop_parse > 1) {
2863  ret = AVERROR(EAGAIN);
2864  break;
2865  }
2866  if (ts->stop_parse > 0)
2867  break;
2868 
2869  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2870  if (ret != 0)
2871  break;
2872  ret = handle_packet(ts, data, avio_tell(s->pb));
2874  if (ret != 0)
2875  break;
2876  }
2877  ts->last_pos = avio_tell(s->pb);
2878  return ret;
2879 }
2880 
2881 static int mpegts_probe(const AVProbeData *p)
2882 {
2883  const int size = p->buf_size;
2884  int maxscore = 0;
2885  int sumscore = 0;
2886  int i;
2887  int check_count = size / TS_FEC_PACKET_SIZE;
2888 #define CHECK_COUNT 10
2889 #define CHECK_BLOCK 100
2890 
2891  if (!check_count)
2892  return 0;
2893 
2894  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2895  int left = FFMIN(check_count - i, CHECK_BLOCK);
2896  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2897  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2898  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2899  score = FFMAX3(score, dvhs_score, fec_score);
2900  sumscore += score;
2901  maxscore = FFMAX(maxscore, score);
2902  }
2903 
2904  sumscore = sumscore * CHECK_COUNT / check_count;
2905  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2906 
2907  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2908 
2909  if (check_count > CHECK_COUNT && sumscore > 6) {
2910  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2911  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2912  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2913  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2914  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2915  } else if (sumscore > 6) {
2916  return 2;
2917  } else {
2918  return 0;
2919  }
2920 }
2921 
2922 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2923  * (-1) if not available */
2924 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2925 {
2926  int afc, len, flags;
2927  const uint8_t *p;
2928  unsigned int v;
2929 
2930  afc = (packet[3] >> 4) & 3;
2931  if (afc <= 1)
2932  return AVERROR_INVALIDDATA;
2933  p = packet + 4;
2934  len = p[0];
2935  p++;
2936  if (len == 0)
2937  return AVERROR_INVALIDDATA;
2938  flags = *p++;
2939  len--;
2940  if (!(flags & 0x10))
2941  return AVERROR_INVALIDDATA;
2942  if (len < 6)
2943  return AVERROR_INVALIDDATA;
2944  v = AV_RB32(p);
2945  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2946  *ppcr_low = ((p[4] & 1) << 8) | p[5];
2947  return 0;
2948 }
2949 
2950 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2951 
2952  /* NOTE: We attempt to seek on non-seekable files as well, as the
2953  * probe buffer usually is big enough. Only warn if the seek failed
2954  * on files where the seek should work. */
2955  if (avio_seek(pb, pos, SEEK_SET) < 0)
2956  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2957 }
2958 
2960 {
2961  MpegTSContext *ts = s->priv_data;
2962  AVIOContext *pb = s->pb;
2963  int64_t pos, probesize = s->probesize;
2964 
2966 
2967  if (ffio_ensure_seekback(pb, probesize) < 0)
2968  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2969 
2970  pos = avio_tell(pb);
2972  if (ts->raw_packet_size <= 0) {
2973  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2975  }
2976  ts->stream = s;
2977  ts->auto_guess = 0;
2978 
2979  if (s->iformat == &ff_mpegts_demuxer) {
2980  /* normal demux */
2981 
2982  /* first do a scan to get all the services */
2983  seek_back(s, pb, pos);
2984 
2986 
2988 
2989  handle_packets(ts, probesize / ts->raw_packet_size);
2990  /* if could not find service, enable auto_guess */
2991 
2992  ts->auto_guess = 1;
2993 
2994  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2995 
2997  } else {
2998  AVStream *st;
2999  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3000  int64_t pcrs[2], pcr_h;
3001  int packet_count[2];
3002  uint8_t packet[TS_PACKET_SIZE];
3003  const uint8_t *data;
3004 
3005  /* only read packets */
3006 
3007  st = avformat_new_stream(s, NULL);
3008  if (!st)
3009  return AVERROR(ENOMEM);
3010  avpriv_set_pts_info(st, 60, 1, 27000000);
3013 
3014  /* we iterate until we find two PCRs to estimate the bitrate */
3015  pcr_pid = -1;
3016  nb_pcrs = 0;
3017  nb_packets = 0;
3018  for (;;) {
3019  ret = read_packet(s, packet, ts->raw_packet_size, &data);
3020  if (ret < 0)
3021  return ret;
3022  pid = AV_RB16(data + 1) & 0x1fff;
3023  if ((pcr_pid == -1 || pcr_pid == pid) &&
3024  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3026  pcr_pid = pid;
3027  packet_count[nb_pcrs] = nb_packets;
3028  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3029  nb_pcrs++;
3030  if (nb_pcrs >= 2) {
3031  if (pcrs[1] - pcrs[0] > 0) {
3032  /* the difference needs to be positive to make sense for bitrate computation */
3033  break;
3034  } else {
3035  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3036  pcrs[0] = pcrs[1];
3037  packet_count[0] = packet_count[1];
3038  nb_pcrs--;
3039  }
3040  }
3041  } else {
3043  }
3044  nb_packets++;
3045  }
3046 
3047  /* NOTE1: the bitrate is computed without the FEC */
3048  /* NOTE2: it is only the bitrate of the start of the stream */
3049  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3050  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3051  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3052  st->codecpar->bit_rate = s->bit_rate;
3053  st->start_time = ts->cur_pcr;
3054  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3055  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3056  }
3057 
3058  seek_back(s, pb, pos);
3059  return 0;
3060 }
3061 
3062 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3063 
3065 {
3066  MpegTSContext *ts = s->priv_data;
3067  int ret, i;
3068  int64_t pcr_h, next_pcr_h, pos;
3069  int pcr_l, next_pcr_l;
3070  uint8_t pcr_buf[12];
3071  const uint8_t *data;
3072 
3073  if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
3074  return AVERROR(ENOMEM);
3075  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3076  pkt->pos = avio_tell(s->pb);
3077  if (ret < 0) {
3078  av_packet_unref(pkt);
3079  return ret;
3080  }
3081  if (data != pkt->data)
3082  memcpy(pkt->data, data, ts->raw_packet_size);
3084  if (ts->mpeg2ts_compute_pcr) {
3085  /* compute exact PCR for each packet */
3086  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3087  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3088  pos = avio_tell(s->pb);
3089  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3090  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3091  avio_read(s->pb, pcr_buf, 12);
3092  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3093  /* XXX: not precise enough */
3094  ts->pcr_incr =
3095  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3096  (i + 1);
3097  break;
3098  }
3099  }
3100  avio_seek(s->pb, pos, SEEK_SET);
3101  /* no next PCR found: we use previous increment */
3102  ts->cur_pcr = pcr_h * 300 + pcr_l;
3103  }
3104  pkt->pts = ts->cur_pcr;
3105  pkt->duration = ts->pcr_incr;
3106  ts->cur_pcr += ts->pcr_incr;
3107  }
3108  pkt->stream_index = 0;
3109  return 0;
3110 }
3111 
3113 {
3114  MpegTSContext *ts = s->priv_data;
3115  int ret, i;
3116 
3117  pkt->size = -1;
3118  ts->pkt = pkt;
3119  ret = handle_packets(ts, 0);
3120  if (ret < 0) {
3121  av_packet_unref(ts->pkt);
3122  /* flush pes data left */
3123  for (i = 0; i < NB_PID_MAX; i++)
3124  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3125  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3126  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3127  ret = new_pes_packet(pes, pkt);
3128  if (ret < 0)
3129  return ret;
3130  pes->state = MPEGTS_SKIP;
3131  ret = 0;
3132  break;
3133  }
3134  }
3135  }
3136 
3137  if (!ret && pkt->size < 0)
3138  ret = AVERROR_INVALIDDATA;
3139  return ret;
3140 }
3141 
3142 static void mpegts_free(MpegTSContext *ts)
3143 {
3144  int i;
3145 
3146  clear_programs(ts);
3147 
3148  for (i = 0; i < NB_PID_MAX; i++)
3149  if (ts->pids[i])
3150  mpegts_close_filter(ts, ts->pids[i]);
3151 }
3152 
3154 {
3155  MpegTSContext *ts = s->priv_data;
3156  mpegts_free(ts);
3157  return 0;
3158 }
3159 
3160 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3161  int64_t *ppos, int64_t pos_limit)
3162 {
3163  MpegTSContext *ts = s->priv_data;
3164  int64_t pos, timestamp;
3166  int pcr_l, pcr_pid =
3167  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3168  int pos47 = ts->pos47_full % ts->raw_packet_size;
3169  pos =
3170  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3171  ts->raw_packet_size + pos47;
3172  while(pos < pos_limit) {
3173  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3174  return AV_NOPTS_VALUE;
3175  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3176  return AV_NOPTS_VALUE;
3177  if (buf[0] != 0x47) {
3178  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3179  return AV_NOPTS_VALUE;
3180  pos = avio_tell(s->pb);
3181  continue;
3182  }
3183  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3184  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3185  *ppos = pos;
3186  return timestamp;
3187  }
3188  pos += ts->raw_packet_size;
3189  }
3190 
3191  return AV_NOPTS_VALUE;
3192 }
3193 
3194 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3195  int64_t *ppos, int64_t pos_limit)
3196 {
3197  MpegTSContext *ts = s->priv_data;
3198  int64_t pos;
3199  int pos47 = ts->pos47_full % ts->raw_packet_size;
3200  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3202  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3203  return AV_NOPTS_VALUE;
3204  while(pos < pos_limit) {
3205  int ret;
3206  AVPacket pkt;
3207  av_init_packet(&pkt);
3208  ret = av_read_frame(s, &pkt);
3209  if (ret < 0)
3210  return AV_NOPTS_VALUE;
3211  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3212  ff_reduce_index(s, pkt.stream_index);
3213  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3214  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3215  int64_t dts = pkt.dts;
3216  *ppos = pkt.pos;
3217  av_packet_unref(&pkt);
3218  return dts;
3219  }
3220  }
3221  pos = pkt.pos;
3222  av_packet_unref(&pkt);
3223  }
3224 
3225  return AV_NOPTS_VALUE;
3226 }
3227 
3228 /**************************************************************/
3229 /* parsing functions - called from other demuxers such as RTP */
3230 
3232 {
3233  MpegTSContext *ts;
3234 
3235  ts = av_mallocz(sizeof(MpegTSContext));
3236  if (!ts)
3237  return NULL;
3238  /* no stream case, currently used by RTP */
3240  ts->stream = s;
3241  ts->auto_guess = 1;
3244 
3245  return ts;
3246 }
3247 
3248 /* return the consumed length if a packet was output, or -1 if no
3249  * packet is output */
3251  const uint8_t *buf, int len)
3252 {
3253  int len1;
3254 
3255  len1 = len;
3256  ts->pkt = pkt;
3257  for (;;) {
3258  ts->stop_parse = 0;
3259  if (len < TS_PACKET_SIZE)
3260  return AVERROR_INVALIDDATA;
3261  if (buf[0] != 0x47) {
3262  buf++;
3263  len--;
3264  } else {
3265  handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3266  buf += TS_PACKET_SIZE;
3267  len -= TS_PACKET_SIZE;
3268  if (ts->stop_parse == 1)
3269  break;
3270  }
3271  }
3272  return len1 - len;
3273 }
3274 
3276 {
3277  mpegts_free(ts);
3278  av_free(ts);
3279 }
3280 
3281 AVInputFormat ff_mpegts_demuxer = {
3282  .name = "mpegts",
3283  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3284  .priv_data_size = sizeof(MpegTSContext),
3289  .read_timestamp = mpegts_get_dts,
3291  .priv_class = &mpegts_class,
3292 };
3293 
3295  .name = "mpegtsraw",
3296  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3297  .priv_data_size = sizeof(MpegTSContext),
3301  .read_timestamp = mpegts_get_dts,
3303  .priv_class = &mpegtsraw_class,
3304 };
const char * name
Definition: avisynth_c.h:867
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:3142
unsigned last_crc
Definition: mpegts.c:87
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1524
uint8_t last_sec_num
Definition: mpegts.c:643
#define NULL
Definition: coverity.c:32
#define SDT_PID
Definition: mpegts.h:37
int64_t pos47_full
Definition: mpegts.c:129
const char const char void * val
Definition: avisynth_c.h:863
int64_t last_pcr
Definition: mpegts.c:99
Bytestream IO Context.
Definition: avio.h:161
int es_id
Definition: mpegts.c:97
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int merge_pmt_versions
Definition: mpegts.c:158
int pmt_stream_idx
Definition: avformat.h:1127
#define PES_START_SIZE
Definition: mpegts.c:232
#define PMT_TID
Definition: mpegts.h:41
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
int size
#define MP4ESDescrTag
Definition: isom.h:300
int total_size
Definition: mpegts.c:248
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:485
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2820
int pmt_version
Definition: avformat.h:1126
AVOption.
Definition: opt.h:246
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:140
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:284
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2052
#define PROBE_PACKET_MAX_BUF
Definition: mpegts.c:59
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:3062
enum AVMediaType codec_type
Definition: mpegts.c:783
int64_t dts
Definition: mpegts.c:252
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1479
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
static void clear_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:288
#define AV_DICT_DONT_OVERWRITE
Don&#39;t overwrite existing entries.
Definition: dict.h:79
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4903
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:291
#define MP4ODescrTag
Definition: isom.h:298
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:167
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1091
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:3231
#define avpriv_request_sample(...)
#define PROBE_PACKET_MARGIN
Definition: mpegts.c:60
channels
Definition: aptx.c:30
enum AVCodecID codec_id
Definition: qsv.c:72
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:572
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1190
int index
stream index in AVFormatContext
Definition: avformat.h:882
int size
Definition: avcodec.h:1478
MpegTSPESFilter pes_filter
Definition: mpegts.c:103
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
int prefer_codec_framerate
Definition: internal.h:146
uint8_t version
Definition: mpegts.c:641
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
enum AVMediaType codec_type
Definition: rtp.c:37
int64_t bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1480
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:716
int size_stat_count
Definition: mpegts.c:126
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:839
Contain timestamp estimated through PCR of program stream.
Definition: avcodec.h:690
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:3281
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2501
void * priv_data
Definition: avformat.h:896
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:841
#define M4OD_TID
Definition: mpegts.h:42
int version
Definition: avisynth_c.h:858
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:752
discard all
Definition: avcodec.h:811
enum MpegTSFilterType type
Definition: mpegts.c:101
static AVPacket pkt
int pmt_version
Definition: avformat.h:1286
int pid
Definition: mpegts.c:237
struct Program * prg
Definition: mpegts.c:165
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3112
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:785
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1407
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:238
SLConfigDescr sl
Definition: mpegts.h:94
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2762
int packet_seq_num_len
Definition: mpegts.h:87
int es_id
Definition: mpegts.h:91
int inst_bitrate_len
Definition: mpegts.h:84
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:164
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:465
int last_cc
Definition: mpegts.c:98
Format I/O context.
Definition: avformat.h:1358
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2795
unsigned int nb_stream_indexes
Definition: avformat.h:1280
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:112
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1931
#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:1980
#define SIZE_STAT_THRESHOLD
Definition: mpegts.c:127
Public dictionary API.
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:1032
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:153
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:169
static char buffer[20]
Definition: seek.c:32
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:2959
AVFormatContext * s
Definition: mpegts.c:1414
uint8_t
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: avformat.h:1120
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:203
static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:262
enum MpegTSState state
Definition: mpegts.c:244
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3194
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
AVOptions.
int size_stat[3]
Definition: mpegts.c:125
int au_seq_num_len
Definition: mpegts.h:86
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:800
#define f(width, name)
Definition: cbs_vp9.c:255
int stop_parse
stop parsing loop
Definition: mpegts.c:145
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1493
static int discard_pid(MpegTSContext *ts, unsigned int pid)
discard_pid() decides if the pid is to be discarded according to caller&#39;s programs selection ...
Definition: mpegts.c:377
#define AV_RB32
Definition: intreadwrite.h:130
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:306
static int mpegts_push_data(MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
Definition: mpegts.c:1104
int id
Format-specific stream ID.
Definition: avformat.h:888
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
int use_au_start
Definition: mpegts.h:74
static const AVOption raw_options[]
Definition: mpegts.c:202
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4476
int pmt_pid
Definition: avformat.h:1284
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1755
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:252
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Public header for CRC hash function implementation.
Mp4Descr * descr
Definition: mpegts.c:1416
const char data[16]
Definition: mxf.c:91
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:704
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1446
#define AV_DISPOSITION_DEPENDENT
dependent audio stream (mix_type=0 in mpegts)
Definition: avformat.h:864
uint8_t * data
Definition: avcodec.h:1477
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4575
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
MpegTSState
Definition: mpegts.c:223
uint32_t tag
Definition: movenc.c:1496
#define ff_dlog(a,...)
#define AVERROR_EOF
End of file.
Definition: error.h:55
bitstream reader API header.
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int pid
Definition: mpegts.c:96
#define FF_PROFILE_ARIB_PROFILE_C
Definition: avcodec.h:3011
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
static const uint8_t header[24]
Definition: sdr2.c:67
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:2950
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1278
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1388
unsigned int * stream_index
Definition: avformat.h:1279
int scan_all_pmts
Definition: mpegts.c:155
#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:647
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:530
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3294
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1424
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: avcodec.h:1359
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:817
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:572
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:554
enum AVCodecID codec_id
Definition: mpegts.c:784
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:454
AVBufferRef * buffer
Definition: mpegts.c:255
AVProgram * av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
Find the programs which belong to a given stream.
Definition: utils.c:4186
static const uint8_t opus_default_extradata[30]
Definition: opus.h:56
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:510
static void reanalyze(MpegTSContext *ts)
Definition: mpegts.c:2727
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const StreamType SCTE_types[]
Definition: mpegts.c:826
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1421
static const StreamType HDMV_types[]
Definition: mpegts.c:810
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:469
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:273
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:3153
unsigned int check_crc
Definition: mpegts.c:89
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3064
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1370
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1898
const char * r
Definition: vf_curves.c:114
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1537
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:565
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1460
int pes_header_size
Definition: mpegts.c:249
simple assert() macros that are a bit more flexible than ISO C assert().
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
Definition: codec_desc.c:3282
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
uint8_t bits
Definition: vp3data.h:202
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1275
#define FFMAX(a, b)
Definition: common.h:94
static int64_t ff_parse_pes_pts(const uint8_t *buf)
Parse MPEG-PES five-byte timestamp.
Definition: mpeg.h:68
int timestamp_len
Definition: mpegts.h:81
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1514
int flags
copied to the AVPacket flags
Definition: mpegts.c:247
int program_num
Definition: avformat.h:1283
#define MAX_SECTION_SIZE
Definition: mpegts.h:33
int pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:141
int current_pid
Definition: mpegts.c:170
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:205
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4987
union MpegTSFilter::@269 u
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3305
int64_t ts_packet_pos
position of first TS packet of this PES packet
Definition: mpegts.c:253
SectionCallback * section_cb
Definition: mpegts.c:91
static const StreamType REGD_types[]
Definition: mpegts.c:838
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
Definition: mpegts.c:70
#define FFMIN(a, b)
Definition: common.h:96
static const StreamType MISC_types[]
Definition: mpegts.c:832
uint16_t id
Definition: mpegts.c:640
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:1639
#define TS_DVHS_PACKET_SIZE
Definition: mpegts.h:28
AVStream * st
Definition: mpegts.c:242
static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
Definition: mpegts.c:2174
static struct @313 state
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2899
#define MP4IODescrTag
Definition: isom.h:299
AVFormatContext * stream
Definition: mpegts.c:121
int skip_changes
Definition: mpegts.c:151
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:392
static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:338
int ocr_len
Definition: mpegts.h:82
static int mpegts_probe(const AVProbeData *p)
Definition: mpegts.c:2881
#define s(width, name)
Definition: cbs_vp9.c:257
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:887
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:945
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1751
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1570
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1528
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:135
static const AVClass mpegtsraw_class
Definition: mpegts.c:214
static AVStream * find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid, int stream_identifier, int pmt_stream_idx)
Definition: mpegts.c:2142
MpegTSSectionFilter section_filter
Definition: mpegts.c:104
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1747
#define CHECK_BLOCK
if(ret< 0)
Definition: vf_mcdeint.c:279
int program_num
Details of the MPEG-TS program which created this stream.
Definition: avformat.h:1125
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:1025
uint8_t sec_num
Definition: mpegts.c:642
static int get_packet_size(AVFormatContext *s)
Definition: mpegts.c:601
int extended_stream_id
Definition: mpegts.c:250
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
int stream_type
Definition: mpegts.c:239
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:132
int raw_packet_size
raw packet size, including FEC if present
Definition: mpegts.c:123
static const StreamType ISO_types[]
Definition: mpegts.c:787
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
int ts_id
Transport stream id.
Definition: avformat.h:1698
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:840
Stream structure.
Definition: avformat.h:881
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:705
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3160
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int skip_unknown_pmt
Definition: mpegts.c:153
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define TS_MAX_PACKET_SIZE
Definition: mpegts.h:30
uint8_t * dec_config_descr
Definition: mpegts.h:93
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:862
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1238
unsigned int id
Definition: mpegts.c:110
#define MP4DecConfigDescrTag
Definition: isom.h:301
uint8_t stream_id
Definition: mpegts.c:251
static MpegTSFilter * mpegts_open_filter(MpegTSContext *ts, unsigned int pid, enum MpegTSFilterType type)
Definition: mpegts.c:482
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
#define hex_dump_debug(class, buf, size)
Definition: internal.h:41
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
static const StreamType METADATA_types[]
Definition: mpegts.c:854
int use_au_end
Definition: mpegts.h:75
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1456
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:985
int resync_size
Definition: mpegts.c:157
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
void * buf
Definition: avisynth_c.h:766
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:234
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:657
#define MAX_LEVEL
Definition: mpegts.c:1412
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:108
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:2924
int use_timestamps
Definition: mpegts.h:78
int merged_st
Definition: mpegts.c:257
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2216
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:192
cl_device_type type
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:3250
#define mid_pred
Definition: mathops.h:97
AVMediaType
Definition: avutil.h:199
refcounted data buffer API
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:551
static const StreamType DESC_types[]
Definition: mpegts.c:861
#define snprintf
Definition: snprintf.h:34
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
int use_idle
Definition: mpegts.h:79
SLConfigDescr sl
Definition: mpegts.c:256
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1781
int dec_config_descr_len
Definition: mpegts.h:92
uint8_t * section_buf
Definition: mpegts.c:88
uint8_t tid
Definition: mpegts.c:639
AVDictionary * metadata
Definition: avformat.h:1281
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:173
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
#define flags(name, subs,...)
Definition: cbs_av1.c:564
int discard
Definition: mpegts.c:100
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
unsigned int end_of_section_reached
Definition: mpegts.c:90
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:415
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:1766
static void clear_programs(MpegTSContext *ts)
Definition: mpegts.c:300
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:1051
static int probe(const AVProbeData *p)
Definition: act.c:36
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
A reference to a data buffer.
Definition: buffer.h:81
static const AVOption options[]
Definition: mpegts.c:176
full parsing and repack
Definition: avformat.h:800
AVFormatContext * stream
Definition: mpegts.c:241
int skip_clear
Definition: mpegts.c:152
Main libavformat public API header.
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2426
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:476
static const AVClass mpegts_class
Definition: mpegts.c:195
static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
Definition: mpegts.c:2589
int use_rand_acc_pt
Definition: mpegts.h:76
int data_index
Definition: mpegts.c:246
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1202
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:81
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:920
static double c[64]
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:4017
unsigned crc
Definition: mpegts.c:86
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:934
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:254
#define FF_PROFILE_ARIB_PROFILE_A
Definition: avcodec.h:3010
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:969
#define AV_DISPOSITION_STILL_IMAGE
still images in video stream (still_picture_flag=1 in mpegts)
Definition: avformat.h:865
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:2210
#define MAX_PES_PAYLOAD
Definition: mpegts.c:48
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int pmt_found
have we found pmt for this program
Definition: mpegts.c:115
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1510
PESCallback * pes_cb
Definition: mpegts.c:74
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:646
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:790
static MpegTSFilter * mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
Definition: mpegts.c:505
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:703
unsigned int nb_pids
Definition: mpegts.c:111
void * opaque
Definition: mpegts.c:75
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:670
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:667
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1417
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:147
int len
#define PAT_PID
Definition: mpegts.h:36
void * priv_data
Format private data.
Definition: avformat.h:1386
int pcr_pid
Definition: avformat.h:1285
int64_t last_pos
to detect seek
Definition: mpegts.c:149
int timestamp_res
Definition: mpegts.h:80
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:289
#define PES_HEADER_SIZE
Definition: mpegts.c:233
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
Definition: mpegts.c:320
int64_t pts
Definition: mpegts.c:252
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
int use_padding
Definition: mpegts.h:77
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:172
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:80
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
FILE * out
Definition: movenc.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:546
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1718
int degr_prior_len
Definition: mpegts.h:85
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1467
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1655
AVIOContext pb
Definition: mpegts.c:1415
int stream_index
Definition: avcodec.h:1479
MpegTSFilterType
Definition: mpegts.c:62
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:50
#define MKTAG(a, b, c, d)
Definition: common.h:366
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:870
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:3275
int au_len
Definition: mpegts.h:83
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1139
This structure stores compressed data.
Definition: avcodec.h:1454
#define R8_CHECK_CLIP_MAX(dst, maxv)
uint32_t stream_type
Definition: mpegts.c:782
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:685
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
static void update_av_program_info(AVFormatContext *s, unsigned int programid, unsigned int pid, int version)
Definition: mpegts.c:347
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
Definition: mpegts.c:978
#define FFMAX3(a, b, c)
Definition: common.h:95
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define av_unused
Definition: attributes.h:125
AVProgram ** programs
Definition: avformat.h:1538
#define MP4SLDescrTag
Definition: isom.h:303
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:138
#define NB_PID_MAX
Definition: mpegts.h:32
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2828
#define SDT_TID
Definition: mpegts.h:43
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:78
AVStream * sub_st
stream for the embedded AC3 stream in HDMV TrueHD
Definition: mpegts.c:243
MpegTSContext * ts
Definition: mpegts.c:240
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:1623