FFmpeg  4.3.9
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 "libavutil/dovi_meta.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/get_bits.h"
34 #include "libavcodec/opus.h"
35 #include "avformat.h"
36 #include "mpegts.h"
37 #include "internal.h"
38 #include "avio_internal.h"
39 #include "mpeg.h"
40 #include "isom.h"
41 #if CONFIG_ICONV
42 #include <iconv.h>
43 #endif
44 
45 /* maximum size in which we look for synchronization if
46  * synchronization is lost */
47 #define MAX_RESYNC_SIZE 65536
48 
49 #define MAX_PES_PAYLOAD 200 * 1024
50 
51 #define MAX_MP4_DESCR_COUNT 16
52 
53 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
54  do { \
55  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
56  (modulus) = (dividend) % (divisor); \
57  (prev_dividend) = (dividend); \
58  } while (0)
59 
60 #define PROBE_PACKET_MAX_BUF 8192
61 #define PROBE_PACKET_MARGIN 5
62 
67 };
68 
69 typedef struct MpegTSFilter MpegTSFilter;
70 
71 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
72  int is_start, int64_t pos);
73 
74 typedef struct MpegTSPESFilter {
76  void *opaque;
78 
79 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
80 
81 typedef void SetServiceCallback (void *opaque, int ret);
82 
83 typedef struct MpegTSSectionFilter {
86  int last_ver;
87  unsigned crc;
88  unsigned last_crc;
90  unsigned int check_crc : 1;
91  unsigned int end_of_section_reached : 1;
93  void *opaque;
95 
96 struct MpegTSFilter {
97  int pid;
98  int es_id;
99  int last_cc; /* last cc code (-1 if first packet) */
101  int discard;
103  union {
106  } u;
107 };
108 
109 #define MAX_PIDS_PER_PROGRAM 64
110 struct Program {
111  unsigned int id; // program id/service id
112  unsigned int nb_pids;
113  unsigned int pids[MAX_PIDS_PER_PROGRAM];
114 
115  /** have we found pmt for this program */
117 };
118 
120  const AVClass *class;
121  /* user data */
123  /** raw packet size, including FEC if present */
125 
127 
128  /** if true, all pids are analyzed to find streams */
130 
131  /** compute exact PCR for each transport stream packet */
133 
134  /** fix dvb teletext pts */
136 
137  int64_t cur_pcr; /**< used to estimate the exact PCR */
138  int64_t pcr_incr; /**< used to estimate the exact PCR */
139 
140  /* data needed to handle file based ts */
141  /** stop parsing loop */
143  /** packet containing Audio/Video data */
145  /** to detect seek */
147 
151 
153 
156 
157  /******************************************/
158  /* private mpegts data */
159  /* scan context */
160  /** structure to keep track of Program->pids mapping */
161  unsigned int nb_prg;
162  struct Program *prg;
163 
164  int8_t crc_validity[NB_PID_MAX];
165  /** filters for various streams specified by PMT + for the PAT and PMT */
168 
170  AVBufferPool* pools[32];
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  uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
514 
515  if (!section_buf)
516  return NULL;
517 
518  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
519  av_free(section_buf);
520  return NULL;
521  }
522  sec = &filter->u.section_filter;
523  sec->section_cb = section_cb;
524  sec->opaque = opaque;
525  sec->section_buf = section_buf;
526  sec->check_crc = check_crc;
527  sec->last_ver = -1;
528 
529  return filter;
530 }
531 
532 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
534  void *opaque)
535 {
537  MpegTSPESFilter *pes;
538 
539  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
540  return NULL;
541 
542  pes = &filter->u.pes_filter;
543  pes->pes_cb = pes_cb;
544  pes->opaque = opaque;
545  return filter;
546 }
547 
548 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
549 {
550  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
551 }
552 
554 {
555  int pid;
556 
557  pid = filter->pid;
558  if (filter->type == MPEGTS_SECTION)
560  else if (filter->type == MPEGTS_PES) {
561  PESContext *pes = filter->u.pes_filter.opaque;
562  av_buffer_unref(&pes->buffer);
563  /* referenced private data will be freed later in
564  * avformat_close_input (pes->st->priv_data == pes) */
565  if (!pes->st || pes->merged_st) {
566  av_freep(&filter->u.pes_filter.opaque);
567  }
568  }
569 
570  av_free(filter);
571  ts->pids[pid] = NULL;
572 }
573 
574 static int analyze(const uint8_t *buf, int size, int packet_size,
575  int probe)
576 {
577  int stat[TS_MAX_PACKET_SIZE];
578  int stat_all = 0;
579  int i;
580  int best_score = 0;
581 
582  memset(stat, 0, packet_size * sizeof(*stat));
583 
584  for (i = 0; i < size - 3; i++) {
585  if (buf[i] == 0x47) {
586  int pid = AV_RB16(buf+1) & 0x1FFF;
587  int asc = buf[i + 3] & 0x30;
588  if (!probe || pid == 0x1FFF || asc) {
589  int x = i % packet_size;
590  stat[x]++;
591  stat_all++;
592  if (stat[x] > best_score) {
593  best_score = stat[x];
594  }
595  }
596  }
597  }
598 
599  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
600 }
601 
602 /* autodetect fec presence */
604 {
605  int score, fec_score, dvhs_score;
606  int margin;
607  int ret;
608 
609  /*init buffer to store stream for probing */
610  uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
611  int buf_size = 0;
612 
613  while (buf_size < PROBE_PACKET_MAX_BUF) {
614  ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
615  if (ret < 0)
616  return AVERROR_INVALIDDATA;
617  buf_size += ret;
618 
619  score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
620  dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
621  fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
622  av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
623  buf_size, score, dvhs_score, fec_score);
624 
625  margin = mid_pred(score, fec_score, dvhs_score);
626 
627  if (buf_size < PROBE_PACKET_MAX_BUF)
628  margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
629 
630  if (score > margin)
631  return TS_PACKET_SIZE;
632  else if (dvhs_score > margin)
633  return TS_DVHS_PACKET_SIZE;
634  else if (fec_score > margin)
635  return TS_FEC_PACKET_SIZE;
636  }
637  return AVERROR_INVALIDDATA;
638 }
639 
640 typedef struct SectionHeader {
642  uint16_t id;
646 } SectionHeader;
647 
649 {
650  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
651  return 1;
652 
653  tssf->last_ver = h->version;
654  tssf->last_crc = tssf->crc;
655 
656  return 0;
657 }
658 
659 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
660 {
661  const uint8_t *p;
662  int c;
663 
664  p = *pp;
665  if (p >= p_end)
666  return AVERROR_INVALIDDATA;
667  c = *p++;
668  *pp = p;
669  return c;
670 }
671 
672 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
673 {
674  const uint8_t *p;
675  int c;
676 
677  p = *pp;
678  if (1 >= p_end - p)
679  return AVERROR_INVALIDDATA;
680  c = AV_RB16(p);
681  p += 2;
682  *pp = p;
683  return c;
684 }
685 
686 /* read and allocate a DVB string preceded by its length */
687 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
688 {
689  int len;
690  const uint8_t *p;
691  char *str;
692 
693  p = *pp;
694  len = get8(&p, p_end);
695  if (len < 0)
696  return NULL;
697  if (len > p_end - p)
698  return NULL;
699 #if CONFIG_ICONV
700  if (len) {
701  const char *encodings[] = {
702  "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
703  "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
704  "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
705  "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
706  "", "", "", "", "", "", "", ""
707  };
708  iconv_t cd;
709  char *in, *out;
710  size_t inlen = len, outlen = inlen * 6 + 1;
711  if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
712  char iso8859[12];
713  snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
714  inlen -= 3;
715  in = (char *)p + 3;
716  cd = iconv_open("UTF-8", iso8859);
717  } else if (p[0] < 0x20) {
718  inlen -= 1;
719  in = (char *)p + 1;
720  cd = iconv_open("UTF-8", encodings[*p]);
721  } else {
722  in = (char *)p;
723  cd = iconv_open("UTF-8", encodings[0]);
724  }
725  if (cd == (iconv_t)-1)
726  goto no_iconv;
727  str = out = av_malloc(outlen);
728  if (!str) {
729  iconv_close(cd);
730  return NULL;
731  }
732  if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
733  iconv_close(cd);
734  av_freep(&str);
735  goto no_iconv;
736  }
737  iconv_close(cd);
738  *out = 0;
739  *pp = p + len;
740  return str;
741  }
742 no_iconv:
743 #endif
744  str = av_malloc(len + 1);
745  if (!str)
746  return NULL;
747  memcpy(str, p, len);
748  str[len] = '\0';
749  p += len;
750  *pp = p;
751  return str;
752 }
753 
755  const uint8_t **pp, const uint8_t *p_end)
756 {
757  int val;
758 
759  val = get8(pp, p_end);
760  if (val < 0)
761  return val;
762  h->tid = val;
763  *pp += 2;
764  val = get16(pp, p_end);
765  if (val < 0)
766  return val;
767  h->id = val;
768  val = get8(pp, p_end);
769  if (val < 0)
770  return val;
771  h->version = (val >> 1) & 0x1f;
772  val = get8(pp, p_end);
773  if (val < 0)
774  return val;
775  h->sec_num = val;
776  val = get8(pp, p_end);
777  if (val < 0)
778  return val;
779  h->last_sec_num = val;
780  return 0;
781 }
782 
783 typedef struct StreamType {
784  uint32_t stream_type;
787 } StreamType;
788 
789 static const StreamType ISO_types[] = {
791  { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
793  { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
796  /* Makito encoder sets stream type 0x11 for AAC,
797  * so auto-detect LOAS/LATM instead of hardcoding it. */
798 #if !CONFIG_LOAS_DEMUXER
799  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
800 #endif
802  { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
803  { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
810  { 0 },
811 };
812 
813 static const StreamType HDMV_types[] = {
819  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
820  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
821  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
822  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
825  { 0 },
826 };
827 
828 /* SCTE types */
829 static const StreamType SCTE_types[] = {
831  { 0 },
832 };
833 
834 /* ATSC ? */
835 static const StreamType MISC_types[] = {
838  { 0 },
839 };
840 
841 static const StreamType REGD_types[] = {
842  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
843  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
844  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
845  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
846  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
847  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
848  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
849  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
850  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
851  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
852  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
853  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
854  { 0 },
855 };
856 
857 static const StreamType METADATA_types[] = {
858  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
859  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
860  { 0 },
861 };
862 
863 /* descriptor present */
864 static const StreamType DESC_types[] = {
865  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
866  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
869  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
870  { 0 },
871 };
872 
874  uint32_t stream_type,
875  const StreamType *types)
876 {
877  for (; types->stream_type; types++)
878  if (stream_type == types->stream_type) {
879  if (st->codecpar->codec_type != types->codec_type ||
880  st->codecpar->codec_id != types->codec_id) {
881  st->codecpar->codec_type = types->codec_type;
882  st->codecpar->codec_id = types->codec_id;
883  st->internal->need_context_update = 1;
884  }
885  st->request_probe = 0;
886  return;
887  }
888 }
889 
891  uint32_t stream_type, uint32_t prog_reg_desc)
892 {
893  int old_codec_type = st->codecpar->codec_type;
894  int old_codec_id = st->codecpar->codec_id;
895  int old_codec_tag = st->codecpar->codec_tag;
896 
897  if (avcodec_is_open(st->internal->avctx)) {
898  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
899  return 0;
900  }
901 
902  avpriv_set_pts_info(st, 33, 1, 90000);
903  st->priv_data = pes;
907  pes->st = st;
908  pes->stream_type = stream_type;
909 
910  av_log(pes->stream, AV_LOG_DEBUG,
911  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
912  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
913 
914  st->codecpar->codec_tag = pes->stream_type;
915 
916  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
917  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
918  st->request_probe = 50;
919  if ((prog_reg_desc == AV_RL32("HDMV") ||
920  prog_reg_desc == AV_RL32("HDPR")) &&
922  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
923  if (pes->stream_type == 0x83) {
924  // HDMV TrueHD streams also contain an AC3 coded version of the
925  // audio track - add a second stream for this
926  AVStream *sub_st;
927  // priv_data cannot be shared between streams
928  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
929  if (!sub_pes)
930  return AVERROR(ENOMEM);
931  memcpy(sub_pes, pes, sizeof(*sub_pes));
932 
933  sub_st = avformat_new_stream(pes->stream, NULL);
934  if (!sub_st) {
935  av_free(sub_pes);
936  return AVERROR(ENOMEM);
937  }
938 
939  sub_st->id = pes->pid;
940  avpriv_set_pts_info(sub_st, 33, 1, 90000);
941  sub_st->priv_data = sub_pes;
943  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
945  sub_pes->sub_st = pes->sub_st = sub_st;
946  }
947  }
948  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
949  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
950  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
951  st->codecpar->codec_id = old_codec_id;
952  st->codecpar->codec_type = old_codec_type;
953  }
954  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
955  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
956  st->probe_packets > 0 &&
957  stream_type == STREAM_TYPE_PRIVATE_DATA) {
961  }
962 
963  /* queue a context update if properties changed */
964  if (old_codec_type != st->codecpar->codec_type ||
965  old_codec_id != st->codecpar->codec_id ||
966  old_codec_tag != st->codecpar->codec_tag)
967  st->internal->need_context_update = 1;
968 
969  return 0;
970 }
971 
973 {
974  pes->pts = AV_NOPTS_VALUE;
975  pes->dts = AV_NOPTS_VALUE;
976  pes->data_index = 0;
977  pes->flags = 0;
978  av_buffer_unref(&pes->buffer);
979 }
980 
981 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
982 {
983  av_init_packet(pkt);
984  pkt->data = (uint8_t *)buffer;
985  pkt->size = len;
986 }
987 
989 {
990  uint8_t *sd;
991 
992  av_init_packet(pkt);
993 
994  pkt->buf = pes->buffer;
995  pkt->data = pes->buffer->data;
996  pkt->size = pes->data_index;
997 
998  if (pes->total_size != MAX_PES_PAYLOAD &&
999  pes->pes_header_size + pes->data_index != pes->total_size +
1000  PES_START_SIZE) {
1001  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1002  pes->flags |= AV_PKT_FLAG_CORRUPT;
1003  }
1004  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1005 
1006  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1007  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1008  pkt->stream_index = pes->sub_st->index;
1009  else
1010  pkt->stream_index = pes->st->index;
1011  pkt->pts = pes->pts;
1012  pkt->dts = pes->dts;
1013  /* store position of first TS packet of this PES packet */
1014  pkt->pos = pes->ts_packet_pos;
1015  pkt->flags = pes->flags;
1016 
1017  pes->buffer = NULL;
1019 
1021  if (!sd)
1022  return AVERROR(ENOMEM);
1023  *sd = pes->stream_id;
1024 
1025  return 0;
1026 }
1027 
1028 static uint64_t get_ts64(GetBitContext *gb, int bits)
1029 {
1030  if (get_bits_left(gb) < bits)
1031  return AV_NOPTS_VALUE;
1032  return get_bits64(gb, bits);
1033 }
1034 
1036  const uint8_t *buf, int buf_size)
1037 {
1038  GetBitContext gb;
1039  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1040  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1041  int dts_flag = -1, cts_flag = -1;
1042  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1043  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1044  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1045 
1046  memcpy(buf_padded, buf, buf_padded_size);
1047 
1048  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1049 
1050  if (sl->use_au_start)
1051  au_start_flag = get_bits1(&gb);
1052  if (sl->use_au_end)
1053  au_end_flag = get_bits1(&gb);
1054  if (!sl->use_au_start && !sl->use_au_end)
1055  au_start_flag = au_end_flag = 1;
1056  if (sl->ocr_len > 0)
1057  ocr_flag = get_bits1(&gb);
1058  if (sl->use_idle)
1059  idle_flag = get_bits1(&gb);
1060  if (sl->use_padding)
1061  padding_flag = get_bits1(&gb);
1062  if (padding_flag)
1063  padding_bits = get_bits(&gb, 3);
1064 
1065  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1066  if (sl->packet_seq_num_len)
1068  if (sl->degr_prior_len)
1069  if (get_bits1(&gb))
1070  skip_bits(&gb, sl->degr_prior_len);
1071  if (ocr_flag)
1072  skip_bits_long(&gb, sl->ocr_len);
1073  if (au_start_flag) {
1074  if (sl->use_rand_acc_pt)
1075  get_bits1(&gb);
1076  if (sl->au_seq_num_len > 0)
1077  skip_bits_long(&gb, sl->au_seq_num_len);
1078  if (sl->use_timestamps) {
1079  dts_flag = get_bits1(&gb);
1080  cts_flag = get_bits1(&gb);
1081  }
1082  }
1083  if (sl->inst_bitrate_len)
1084  inst_bitrate_flag = get_bits1(&gb);
1085  if (dts_flag == 1)
1086  dts = get_ts64(&gb, sl->timestamp_len);
1087  if (cts_flag == 1)
1088  cts = get_ts64(&gb, sl->timestamp_len);
1089  if (sl->au_len > 0)
1090  skip_bits_long(&gb, sl->au_len);
1091  if (inst_bitrate_flag)
1092  skip_bits_long(&gb, sl->inst_bitrate_len);
1093  }
1094 
1095  if (dts != AV_NOPTS_VALUE)
1096  pes->dts = dts;
1097  if (cts != AV_NOPTS_VALUE)
1098  pes->pts = cts;
1099 
1100  if (sl->timestamp_len && sl->timestamp_res)
1102 
1103  return (get_bits_count(&gb) + 7) >> 3;
1104 }
1105 
1107 {
1109  if (!ts->pools[index]) {
1110  int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1111  ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1112  if (!ts->pools[index])
1113  return NULL;
1114  }
1115  return av_buffer_pool_get(ts->pools[index]);
1116 }
1117 
1118 /* return non zero if a packet could be constructed */
1120  const uint8_t *buf, int buf_size, int is_start,
1121  int64_t pos)
1122 {
1123  PESContext *pes = filter->u.pes_filter.opaque;
1124  MpegTSContext *ts = pes->ts;
1125  const uint8_t *p;
1126  int ret, len, code;
1127 
1128  if (!ts->pkt)
1129  return 0;
1130 
1131  if (is_start) {
1132  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1133  ret = new_pes_packet(pes, ts->pkt);
1134  if (ret < 0)
1135  return ret;
1136  ts->stop_parse = 1;
1137  } else {
1139  }
1140  pes->state = MPEGTS_HEADER;
1141  pes->ts_packet_pos = pos;
1142  }
1143  p = buf;
1144  while (buf_size > 0) {
1145  switch (pes->state) {
1146  case MPEGTS_HEADER:
1147  len = PES_START_SIZE - pes->data_index;
1148  if (len > buf_size)
1149  len = buf_size;
1150  memcpy(pes->header + pes->data_index, p, len);
1151  pes->data_index += len;
1152  p += len;
1153  buf_size -= len;
1154  if (pes->data_index == PES_START_SIZE) {
1155  /* we got all the PES or section header. We can now
1156  * decide */
1157  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1158  pes->header[2] == 0x01) {
1159  /* it must be an MPEG-2 PES stream */
1160  code = pes->header[3] | 0x100;
1161  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1162  code);
1163  pes->stream_id = pes->header[3];
1164 
1165  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1166  (!pes->sub_st ||
1167  pes->sub_st->discard == AVDISCARD_ALL)) ||
1168  code == 0x1be) /* padding_stream */
1169  goto skip;
1170 
1171  /* stream not present in PMT */
1172  if (!pes->st) {
1173  if (ts->skip_changes)
1174  goto skip;
1175  if (ts->merge_pmt_versions)
1176  goto skip; /* wait for PMT to merge new stream */
1177 
1178  pes->st = avformat_new_stream(ts->stream, NULL);
1179  if (!pes->st)
1180  return AVERROR(ENOMEM);
1181  pes->st->id = pes->pid;
1182  mpegts_set_stream_info(pes->st, pes, 0, 0);
1183  }
1184 
1185  pes->total_size = AV_RB16(pes->header + 4);
1186  /* NOTE: a zero total size means the PES size is
1187  * unbounded */
1188  if (!pes->total_size)
1189  pes->total_size = MAX_PES_PAYLOAD;
1190 
1191  /* allocate pes buffer */
1192  pes->buffer = buffer_pool_get(ts, pes->total_size);
1193  if (!pes->buffer)
1194  return AVERROR(ENOMEM);
1195 
1196  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1197  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1198  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1199  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1200  pes->state = MPEGTS_PESHEADER;
1201  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1202  av_log(pes->stream, AV_LOG_TRACE,
1203  "pid=%x stream_type=%x probing\n",
1204  pes->pid,
1205  pes->stream_type);
1206  pes->st->request_probe = 1;
1207  }
1208  } else {
1209  pes->pes_header_size = 6;
1210  pes->state = MPEGTS_PAYLOAD;
1211  pes->data_index = 0;
1212  }
1213  } else {
1214  /* otherwise, it should be a table */
1215  /* skip packet */
1216 skip:
1217  pes->state = MPEGTS_SKIP;
1218  continue;
1219  }
1220  }
1221  break;
1222  /**********************************************/
1223  /* PES packing parsing */
1224  case MPEGTS_PESHEADER:
1225  len = PES_HEADER_SIZE - pes->data_index;
1226  if (len < 0)
1227  return AVERROR_INVALIDDATA;
1228  if (len > buf_size)
1229  len = buf_size;
1230  memcpy(pes->header + pes->data_index, p, len);
1231  pes->data_index += len;
1232  p += len;
1233  buf_size -= len;
1234  if (pes->data_index == PES_HEADER_SIZE) {
1235  pes->pes_header_size = pes->header[8] + 9;
1237  }
1238  break;
1239  case MPEGTS_PESHEADER_FILL:
1240  len = pes->pes_header_size - pes->data_index;
1241  if (len < 0)
1242  return AVERROR_INVALIDDATA;
1243  if (len > buf_size)
1244  len = buf_size;
1245  memcpy(pes->header + pes->data_index, p, len);
1246  pes->data_index += len;
1247  p += len;
1248  buf_size -= len;
1249  if (pes->data_index == pes->pes_header_size) {
1250  const uint8_t *r;
1251  unsigned int flags, pes_ext, skip;
1252 
1253  flags = pes->header[7];
1254  r = pes->header + 9;
1255  pes->pts = AV_NOPTS_VALUE;
1256  pes->dts = AV_NOPTS_VALUE;
1257  if ((flags & 0xc0) == 0x80) {
1258  pes->dts = pes->pts = ff_parse_pes_pts(r);
1259  r += 5;
1260  } else if ((flags & 0xc0) == 0xc0) {
1261  pes->pts = ff_parse_pes_pts(r);
1262  r += 5;
1263  pes->dts = ff_parse_pes_pts(r);
1264  r += 5;
1265  }
1266  pes->extended_stream_id = -1;
1267  if (flags & 0x01) { /* PES extension */
1268  pes_ext = *r++;
1269  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1270  skip = (pes_ext >> 4) & 0xb;
1271  skip += skip & 0x9;
1272  r += skip;
1273  if ((pes_ext & 0x41) == 0x01 &&
1274  (r + 2) <= (pes->header + pes->pes_header_size)) {
1275  /* PES extension 2 */
1276  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1277  pes->extended_stream_id = r[1];
1278  }
1279  }
1280 
1281  /* we got the full header. We parse it and get the payload */
1282  pes->state = MPEGTS_PAYLOAD;
1283  pes->data_index = 0;
1284  if (pes->stream_type == 0x12 && buf_size > 0) {
1285  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1286  buf_size);
1287  pes->pes_header_size += sl_header_bytes;
1288  p += sl_header_bytes;
1289  buf_size -= sl_header_bytes;
1290  }
1291  if (pes->stream_type == 0x15 && buf_size >= 5) {
1292  /* skip metadata access unit header */
1293  pes->pes_header_size += 5;
1294  p += 5;
1295  buf_size -= 5;
1296  }
1297  if ( pes->ts->fix_teletext_pts
1300  ) {
1301  AVProgram *p = NULL;
1302  int pcr_found = 0;
1303  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1304  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1305  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1306  if (f) {
1307  AVStream *st = NULL;
1308  if (f->type == MPEGTS_PES) {
1309  PESContext *pcrpes = f->u.pes_filter.opaque;
1310  if (pcrpes)
1311  st = pcrpes->st;
1312  } else if (f->type == MPEGTS_PCR) {
1313  int i;
1314  for (i = 0; i < p->nb_stream_indexes; i++) {
1315  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1316  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1317  st = pst;
1318  }
1319  }
1320  if (f->last_pcr != -1 && !f->discard) {
1321  // teletext packets do not always have correct timestamps,
1322  // the standard says they should be handled after 40.6 ms at most,
1323  // and the pcr error to this packet should be no more than 100 ms.
1324  // TODO: we should interpolate the PCR, not just use the last one
1325  int64_t pcr = f->last_pcr / 300;
1326  pcr_found = 1;
1327  if (st) {
1330  }
1331  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1332  pes->pts = pes->dts = pcr;
1333  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1334  pes->dts > pcr + 3654 + 9000) {
1335  pes->pts = pes->dts = pcr + 3654 + 9000;
1336  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1337  pes->dts > pcr + 10*90000) { //10sec
1338  pes->pts = pes->dts = pcr + 3654 + 9000;
1339  }
1340  break;
1341  }
1342  }
1343  }
1344  }
1345 
1346  if (!pcr_found) {
1348  "Forcing DTS/PTS to be unset for a "
1349  "non-trustworthy PES packet for PID %d as "
1350  "PCR hasn't been received yet.\n",
1351  pes->pid);
1352  pes->dts = pes->pts = AV_NOPTS_VALUE;
1353  }
1354  }
1355  }
1356  break;
1357  case MPEGTS_PAYLOAD:
1358  if (pes->buffer) {
1359  if (pes->data_index > 0 &&
1360  pes->data_index + buf_size > pes->total_size) {
1361  ret = new_pes_packet(pes, ts->pkt);
1362  if (ret < 0)
1363  return ret;
1364  pes->total_size = MAX_PES_PAYLOAD;
1365  pes->buffer = buffer_pool_get(ts, pes->total_size);
1366  if (!pes->buffer)
1367  return AVERROR(ENOMEM);
1368  ts->stop_parse = 1;
1369  } else if (pes->data_index == 0 &&
1370  buf_size > pes->total_size) {
1371  // pes packet size is < ts size packet and pes data is padded with 0xff
1372  // not sure if this is legal in ts but see issue #2392
1373  buf_size = pes->total_size;
1374  }
1375  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1376  pes->data_index += buf_size;
1377  /* emit complete packets with known packet size
1378  * decreases demuxer delay for infrequent packets like subtitles from
1379  * a couple of seconds to milliseconds for properly muxed files.
1380  * total_size is the number of bytes following pes_packet_length
1381  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1382  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1383  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1384  ts->stop_parse = 1;
1385  ret = new_pes_packet(pes, ts->pkt);
1386  if (ret < 0)
1387  return ret;
1388  }
1389  }
1390  buf_size = 0;
1391  break;
1392  case MPEGTS_SKIP:
1393  buf_size = 0;
1394  break;
1395  }
1396  }
1397 
1398  return 0;
1399 }
1400 
1401 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1402 {
1403  MpegTSFilter *tss;
1404  PESContext *pes;
1405 
1406  /* if no pid found, then add a pid context */
1407  pes = av_mallocz(sizeof(PESContext));
1408  if (!pes)
1409  return 0;
1410  pes->ts = ts;
1411  pes->stream = ts->stream;
1412  pes->pid = pid;
1413  pes->pcr_pid = pcr_pid;
1414  pes->state = MPEGTS_SKIP;
1415  pes->pts = AV_NOPTS_VALUE;
1416  pes->dts = AV_NOPTS_VALUE;
1417  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1418  if (!tss) {
1419  av_free(pes);
1420  return 0;
1421  }
1422  return pes;
1423 }
1424 
1425 #define MAX_LEVEL 4
1426 typedef struct MP4DescrParseContext {
1433  int level;
1436 
1438  const uint8_t *buf, unsigned size,
1439  Mp4Descr *descr, int max_descr_count)
1440 {
1441  int ret;
1442  if (size > (1 << 30))
1443  return AVERROR_INVALIDDATA;
1444 
1445  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1446  NULL, NULL, NULL, NULL)) < 0)
1447  return ret;
1448 
1449  d->s = s;
1450  d->level = 0;
1451  d->descr_count = 0;
1452  d->descr = descr;
1453  d->active_descr = NULL;
1454  d->max_descr_count = max_descr_count;
1455 
1456  return 0;
1457 }
1458 
1459 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1460 {
1461  int64_t new_off = avio_tell(pb);
1462  (*len) -= new_off - *off;
1463  *off = new_off;
1464 }
1465 
1466 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1467  int target_tag);
1468 
1470 {
1471  while (len > 0) {
1472  int ret = parse_mp4_descr(d, off, len, 0);
1473  if (ret < 0)
1474  return ret;
1475  update_offsets(&d->pb, &off, &len);
1476  }
1477  return 0;
1478 }
1479 
1481 {
1482  avio_rb16(&d->pb); // ID
1483  avio_r8(&d->pb);
1484  avio_r8(&d->pb);
1485  avio_r8(&d->pb);
1486  avio_r8(&d->pb);
1487  avio_r8(&d->pb);
1488  update_offsets(&d->pb, &off, &len);
1489  return parse_mp4_descr_arr(d, off, len);
1490 }
1491 
1493 {
1494  int id_flags;
1495  if (len < 2)
1496  return 0;
1497  id_flags = avio_rb16(&d->pb);
1498  if (!(id_flags & 0x0020)) { // URL_Flag
1499  update_offsets(&d->pb, &off, &len);
1500  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1501  } else {
1502  return 0;
1503  }
1504 }
1505 
1507 {
1508  int es_id = 0;
1509  int ret = 0;
1510 
1511  if (d->descr_count >= d->max_descr_count)
1512  return AVERROR_INVALIDDATA;
1513  ff_mp4_parse_es_descr(&d->pb, &es_id);
1514  d->active_descr = d->descr + (d->descr_count++);
1515 
1516  d->active_descr->es_id = es_id;
1517  update_offsets(&d->pb, &off, &len);
1518  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1519  return ret;
1520  update_offsets(&d->pb, &off, &len);
1521  if (len > 0)
1522  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1523  d->active_descr = NULL;
1524  return ret;
1525 }
1526 
1528  int len)
1529 {
1530  Mp4Descr *descr = d->active_descr;
1531  if (!descr)
1532  return AVERROR_INVALIDDATA;
1534  if (!descr->dec_config_descr)
1535  return AVERROR(ENOMEM);
1536  descr->dec_config_descr_len = len;
1537  avio_read(&d->pb, descr->dec_config_descr, len);
1538  return 0;
1539 }
1540 
1542 {
1543  Mp4Descr *descr = d->active_descr;
1544  int predefined;
1545  if (!descr)
1546  return AVERROR_INVALIDDATA;
1547 
1548 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1549  descr->sl.dst = avio_r8(&d->pb); \
1550  if (descr->sl.dst > maxv) { \
1551  descr->sl.dst = maxv; \
1552  return AVERROR_INVALIDDATA; \
1553  } \
1554 } while (0)
1555 
1556  predefined = avio_r8(&d->pb);
1557  if (!predefined) {
1558  int lengths;
1559  int flags = avio_r8(&d->pb);
1560  descr->sl.use_au_start = !!(flags & 0x80);
1561  descr->sl.use_au_end = !!(flags & 0x40);
1562  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1563  descr->sl.use_padding = !!(flags & 0x08);
1564  descr->sl.use_timestamps = !!(flags & 0x04);
1565  descr->sl.use_idle = !!(flags & 0x02);
1566  descr->sl.timestamp_res = avio_rb32(&d->pb);
1567  avio_rb32(&d->pb);
1568  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1569  R8_CHECK_CLIP_MAX(ocr_len, 63);
1570  R8_CHECK_CLIP_MAX(au_len, 31);
1571  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1572  lengths = avio_rb16(&d->pb);
1573  descr->sl.degr_prior_len = lengths >> 12;
1574  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1575  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1576  } else if (!d->predefined_SLConfigDescriptor_seen){
1577  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1579  }
1580  return 0;
1581 }
1582 
1584  int target_tag)
1585 {
1586  int tag;
1587  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1588  int ret = 0;
1589 
1590  update_offsets(&d->pb, &off, &len);
1591  if (len < 0 || len1 > len || len1 <= 0) {
1592  av_log(d->s, AV_LOG_ERROR,
1593  "Tag %x length violation new length %d bytes remaining %d\n",
1594  tag, len1, len);
1595  return AVERROR_INVALIDDATA;
1596  }
1597 
1598  if (d->level++ >= MAX_LEVEL) {
1599  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1600  ret = AVERROR_INVALIDDATA;
1601  goto done;
1602  }
1603 
1604  if (target_tag && tag != target_tag) {
1605  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1606  target_tag);
1607  ret = AVERROR_INVALIDDATA;
1608  goto done;
1609  }
1610 
1611  switch (tag) {
1612  case MP4IODescrTag:
1613  ret = parse_MP4IODescrTag(d, off, len1);
1614  break;
1615  case MP4ODescrTag:
1616  ret = parse_MP4ODescrTag(d, off, len1);
1617  break;
1618  case MP4ESDescrTag:
1619  ret = parse_MP4ESDescrTag(d, off, len1);
1620  break;
1621  case MP4DecConfigDescrTag:
1622  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1623  break;
1624  case MP4SLDescrTag:
1625  ret = parse_MP4SLDescrTag(d, off, len1);
1626  break;
1627  }
1628 
1629 
1630 done:
1631  d->level--;
1632  avio_seek(&d->pb, off + len1, SEEK_SET);
1633  return ret;
1634 }
1635 
1636 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1637  Mp4Descr *descr, int *descr_count, int max_descr_count)
1638 {
1640  int ret;
1641 
1643 
1644  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1645  if (ret < 0)
1646  return ret;
1647 
1648  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1649 
1650  *descr_count = d.descr_count;
1651  return ret;
1652 }
1653 
1654 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1655  Mp4Descr *descr, int *descr_count, int max_descr_count)
1656 {
1658  int ret;
1659 
1660  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1661  if (ret < 0)
1662  return ret;
1663 
1664  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1665 
1666  *descr_count = d.descr_count;
1667  return ret;
1668 }
1669 
1671  int section_len)
1672 {
1673  MpegTSContext *ts = filter->u.section_filter.opaque;
1674  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1675  SectionHeader h;
1676  const uint8_t *p, *p_end;
1677  AVIOContext pb;
1678  int mp4_descr_count = 0;
1679  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1680  int i, pid;
1681  AVFormatContext *s = ts->stream;
1682 
1683  p_end = section + section_len - 4;
1684  p = section;
1685  if (parse_section_header(&h, &p, p_end) < 0)
1686  return;
1687  if (h.tid != M4OD_TID)
1688  return;
1689  if (skip_identical(&h, tssf))
1690  return;
1691 
1692  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1694 
1695  for (pid = 0; pid < NB_PID_MAX; pid++) {
1696  if (!ts->pids[pid])
1697  continue;
1698  for (i = 0; i < mp4_descr_count; i++) {
1699  PESContext *pes;
1700  AVStream *st;
1701  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1702  continue;
1703  if (ts->pids[pid]->type != MPEGTS_PES) {
1704  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1705  continue;
1706  }
1707  pes = ts->pids[pid]->u.pes_filter.opaque;
1708  st = pes->st;
1709  if (!st)
1710  continue;
1711 
1712  pes->sl = mp4_descr[i].sl;
1713 
1714  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1715  mp4_descr[i].dec_config_descr_len, 0,
1716  NULL, NULL, NULL, NULL);
1717  ff_mp4_read_dec_config_descr(s, st, &pb);
1718  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1719  st->codecpar->extradata_size > 0)
1720  st->need_parsing = 0;
1721  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1722  st->codecpar->extradata_size > 0)
1723  st->need_parsing = 0;
1724 
1726  st->internal->need_context_update = 1;
1727  }
1728  }
1729  for (i = 0; i < mp4_descr_count; i++)
1730  av_free(mp4_descr[i].dec_config_descr);
1731 }
1732 
1734  int section_len)
1735 {
1736  AVProgram *prg = NULL;
1737  MpegTSContext *ts = filter->u.section_filter.opaque;
1738 
1739  int idx = ff_find_stream_index(ts->stream, filter->pid);
1740  if (idx < 0)
1741  return;
1742 
1743  /**
1744  * In case we receive an SCTE-35 packet before mpegts context is fully
1745  * initialized.
1746  */
1747  if (!ts->pkt)
1748  return;
1749 
1750  new_data_packet(section, section_len, ts->pkt);
1751  ts->pkt->stream_index = idx;
1752  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1753  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1754  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1755  if (f && f->last_pcr != -1)
1756  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1757  }
1758  ts->stop_parse = 1;
1759 
1760 }
1761 
1763  1, 0, 1, 1, 2, 2, 2, 3, 3
1764 };
1765 
1766 static const uint8_t opus_stream_cnt[9] = {
1767  1, 1, 1, 2, 2, 3, 4, 4, 5,
1768 };
1769 
1770 static const uint8_t opus_channel_map[8][8] = {
1771  { 0 },
1772  { 0,1 },
1773  { 0,2,1 },
1774  { 0,1,2,3 },
1775  { 0,4,1,2,3 },
1776  { 0,4,1,2,3,5 },
1777  { 0,4,1,2,3,5,6 },
1778  { 0,6,1,2,3,4,5,7 },
1779 };
1780 
1782  const uint8_t **pp, const uint8_t *desc_list_end,
1783  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1784  MpegTSContext *ts)
1785 {
1786  const uint8_t *desc_end;
1787  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1788  char language[252];
1789  int i;
1790 
1791  desc_tag = get8(pp, desc_list_end);
1792  if (desc_tag < 0)
1793  return AVERROR_INVALIDDATA;
1794  desc_len = get8(pp, desc_list_end);
1795  if (desc_len < 0)
1796  return AVERROR_INVALIDDATA;
1797  desc_end = *pp + desc_len;
1798  if (desc_end > desc_list_end)
1799  return AVERROR_INVALIDDATA;
1800 
1801  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1802 
1803  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1804  stream_type == STREAM_TYPE_PRIVATE_DATA)
1805  mpegts_find_stream_type(st, desc_tag, DESC_types);
1806 
1807  switch (desc_tag) {
1808  case 0x02: /* video stream descriptor */
1809  if (get8(pp, desc_end) & 0x1) {
1811  }
1812  break;
1813  case 0x1E: /* SL descriptor */
1814  desc_es_id = get16(pp, desc_end);
1815  if (desc_es_id < 0)
1816  break;
1817  if (ts && ts->pids[pid])
1818  ts->pids[pid]->es_id = desc_es_id;
1819  for (i = 0; i < mp4_descr_count; i++)
1820  if (mp4_descr[i].dec_config_descr_len &&
1821  mp4_descr[i].es_id == desc_es_id) {
1822  AVIOContext pb;
1823  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1824  mp4_descr[i].dec_config_descr_len, 0,
1825  NULL, NULL, NULL, NULL);
1826  ff_mp4_read_dec_config_descr(fc, st, &pb);
1827  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1828  st->codecpar->extradata_size > 0) {
1829  st->need_parsing = 0;
1830  st->internal->need_context_update = 1;
1831  }
1833  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1834  }
1835  break;
1836  case 0x1F: /* FMC descriptor */
1837  if (get16(pp, desc_end) < 0)
1838  break;
1839  if (mp4_descr_count > 0 &&
1841  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1842  st->request_probe > 0) &&
1843  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1844  AVIOContext pb;
1845  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1846  mp4_descr->dec_config_descr_len, 0,
1847  NULL, NULL, NULL, NULL);
1848  ff_mp4_read_dec_config_descr(fc, st, &pb);
1849  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1850  st->codecpar->extradata_size > 0) {
1851  st->request_probe = st->need_parsing = 0;
1853  st->internal->need_context_update = 1;
1854  }
1855  }
1856  break;
1857  case 0x56: /* DVB teletext descriptor */
1858  {
1859  uint8_t *extradata = NULL;
1860  int language_count = desc_len / 5, ret;
1861 
1862  if (desc_len > 0 && desc_len % 5 != 0)
1863  return AVERROR_INVALIDDATA;
1864 
1865  if (language_count > 0) {
1866  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1867  av_assert0(language_count <= sizeof(language) / 4);
1868 
1869  if (st->codecpar->extradata == NULL) {
1870  ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1871  if (ret < 0)
1872  return ret;
1873  }
1874 
1875  if (st->codecpar->extradata_size < language_count * 2)
1876  return AVERROR_INVALIDDATA;
1877 
1878  extradata = st->codecpar->extradata;
1879 
1880  for (i = 0; i < language_count; i++) {
1881  language[i * 4 + 0] = get8(pp, desc_end);
1882  language[i * 4 + 1] = get8(pp, desc_end);
1883  language[i * 4 + 2] = get8(pp, desc_end);
1884  language[i * 4 + 3] = ',';
1885 
1886  memcpy(extradata, *pp, 2);
1887  extradata += 2;
1888 
1889  *pp += 2;
1890  }
1891 
1892  language[i * 4 - 1] = 0;
1893  av_dict_set(&st->metadata, "language", language, 0);
1894  st->internal->need_context_update = 1;
1895  }
1896  }
1897  break;
1898  case 0x59: /* subtitling descriptor */
1899  {
1900  /* 8 bytes per DVB subtitle substream data:
1901  * ISO_639_language_code (3 bytes),
1902  * subtitling_type (1 byte),
1903  * composition_page_id (2 bytes),
1904  * ancillary_page_id (2 bytes) */
1905  int language_count = desc_len / 8, ret;
1906 
1907  if (desc_len > 0 && desc_len % 8 != 0)
1908  return AVERROR_INVALIDDATA;
1909 
1910  if (language_count > 1) {
1911  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1912  }
1913 
1914  if (language_count > 0) {
1915  uint8_t *extradata;
1916 
1917  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1918  av_assert0(language_count <= sizeof(language) / 4);
1919 
1920  if (st->codecpar->extradata == NULL) {
1921  ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1922  if (ret < 0)
1923  return ret;
1924  }
1925 
1926  if (st->codecpar->extradata_size < language_count * 5)
1927  return AVERROR_INVALIDDATA;
1928 
1929  extradata = st->codecpar->extradata;
1930 
1931  for (i = 0; i < language_count; i++) {
1932  language[i * 4 + 0] = get8(pp, desc_end);
1933  language[i * 4 + 1] = get8(pp, desc_end);
1934  language[i * 4 + 2] = get8(pp, desc_end);
1935  language[i * 4 + 3] = ',';
1936 
1937  /* hearing impaired subtitles detection using subtitling_type */
1938  switch (*pp[0]) {
1939  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1940  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1941  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1942  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1943  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1944  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1946  break;
1947  }
1948 
1949  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1950  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1951  extradata += 5;
1952 
1953  *pp += 4;
1954  }
1955 
1956  language[i * 4 - 1] = 0;
1957  av_dict_set(&st->metadata, "language", language, 0);
1958  st->internal->need_context_update = 1;
1959  }
1960  }
1961  break;
1962  case 0x0a: /* ISO 639 language descriptor */
1963  for (i = 0; i + 4 <= desc_len; i += 4) {
1964  language[i + 0] = get8(pp, desc_end);
1965  language[i + 1] = get8(pp, desc_end);
1966  language[i + 2] = get8(pp, desc_end);
1967  language[i + 3] = ',';
1968  switch (get8(pp, desc_end)) {
1969  case 0x01:
1971  break;
1972  case 0x02:
1974  break;
1975  case 0x03:
1978  break;
1979  }
1980  }
1981  if (i && language[0]) {
1982  language[i - 1] = 0;
1983  /* don't overwrite language, as it may already have been set by
1984  * another, more specific descriptor (e.g. supplementary audio) */
1985  av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1986  }
1987  break;
1988  case 0x05: /* registration descriptor */
1989  st->codecpar->codec_tag = bytestream_get_le32(pp);
1990  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1991  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1992  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1993  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1994  st->request_probe = 50;
1995  }
1996  break;
1997  case 0x52: /* stream identifier descriptor */
1998  st->stream_identifier = 1 + get8(pp, desc_end);
1999  break;
2000  case 0x26: /* metadata descriptor */
2001  if (get16(pp, desc_end) == 0xFFFF)
2002  *pp += 4;
2003  if (get8(pp, desc_end) == 0xFF) {
2004  st->codecpar->codec_tag = bytestream_get_le32(pp);
2005  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2006  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2007  }
2008  break;
2009  case 0x7f: /* DVB extension descriptor */
2010  ext_desc_tag = get8(pp, desc_end);
2011  if (ext_desc_tag < 0)
2012  return AVERROR_INVALIDDATA;
2013  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2014  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2015  if (!st->codecpar->extradata) {
2018  if (!st->codecpar->extradata)
2019  return AVERROR(ENOMEM);
2020 
2023 
2024  channel_config_code = get8(pp, desc_end);
2025  if (channel_config_code < 0)
2026  return AVERROR_INVALIDDATA;
2027  if (channel_config_code <= 0x8) {
2028  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2029  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2030  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2031  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2032  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2033  } else {
2034  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2035  }
2037  st->internal->need_context_update = 1;
2038  }
2039  }
2040  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2041  int flags;
2042 
2043  if (desc_len < 1)
2044  return AVERROR_INVALIDDATA;
2045  flags = get8(pp, desc_end);
2046 
2047  if ((flags & 0x80) == 0) /* mix_type */
2049 
2050  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2051  case 0x01:
2054  break;
2055  case 0x02:
2057  break;
2058  case 0x03:
2060  break;
2061  }
2062 
2063  if (flags & 0x01) { /* language_code_present */
2064  if (desc_len < 4)
2065  return AVERROR_INVALIDDATA;
2066  language[0] = get8(pp, desc_end);
2067  language[1] = get8(pp, desc_end);
2068  language[2] = get8(pp, desc_end);
2069  language[3] = 0;
2070 
2071  /* This language always has to override a possible
2072  * ISO 639 language descriptor language */
2073  if (language[0])
2074  av_dict_set(&st->metadata, "language", language, 0);
2075  }
2076  }
2077  break;
2078  case 0x6a: /* ac-3_descriptor */
2079  {
2080  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2081  if (component_type_flag) {
2082  int component_type = get8(pp, desc_end);
2083  int service_type_mask = 0x38; // 0b00111000
2084  int service_type = ((component_type & service_type_mask) >> 3);
2085  if (service_type == 0x02 /* 0b010 */) {
2087  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2088  }
2089  }
2090  }
2091  break;
2092  case 0x7a: /* enhanced_ac-3_descriptor */
2093  {
2094  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2095  if (component_type_flag) {
2096  int component_type = get8(pp, desc_end);
2097  int service_type_mask = 0x38; // 0b00111000
2098  int service_type = ((component_type & service_type_mask) >> 3);
2099  if (service_type == 0x02 /* 0b010 */) {
2101  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2102  }
2103  }
2104  }
2105  break;
2106  case 0xfd: /* ARIB data coding type descriptor */
2107  // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2108  // for captions
2109  if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2110  // This structure is defined in STD-B10, part 1, listing 5.4 and
2111  // part 2, 6.2.20).
2112  // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2113  // Component tag limits are documented in TR-B14, fascicle 2,
2114  // Vol. 3, Section 2, 4.2.8.1
2115  int actual_component_tag = st->stream_identifier - 1;
2116  int picked_profile = FF_PROFILE_UNKNOWN;
2117  int data_component_id = get16(pp, desc_end);
2118  if (data_component_id < 0)
2119  return AVERROR_INVALIDDATA;
2120 
2121  switch (data_component_id) {
2122  case 0x0008:
2123  // [0x30..0x37] are component tags utilized for
2124  // non-mobile captioning service ("profile A").
2125  if (actual_component_tag >= 0x30 &&
2126  actual_component_tag <= 0x37) {
2127  picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2128  }
2129  break;
2130  case 0x0012:
2131  // component tag 0x87 signifies a mobile/partial reception
2132  // (1seg) captioning service ("profile C").
2133  if (actual_component_tag == 0x87) {
2134  picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2135  }
2136  break;
2137  default:
2138  break;
2139  }
2140 
2141  if (picked_profile == FF_PROFILE_UNKNOWN)
2142  break;
2143 
2146  st->codecpar->profile = picked_profile;
2147  st->request_probe = 0;
2148  }
2149  break;
2150  case 0xb0: /* DOVI video stream descriptor */
2151  {
2152  uint32_t buf;
2154  size_t dovi_size;
2155  int ret;
2156  if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2157  return AVERROR_INVALIDDATA;
2158 
2159  dovi = av_dovi_alloc(&dovi_size);
2160  if (!dovi)
2161  return AVERROR(ENOMEM);
2162 
2163  dovi->dv_version_major = get8(pp, desc_end);
2164  dovi->dv_version_minor = get8(pp, desc_end);
2165  buf = get16(pp, desc_end);
2166  dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2167  dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2168  dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2169  dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2170  dovi->bl_present_flag = buf & 0x01; // 1 bit
2171  if (desc_end - *pp >= 20) { // 4 + 4 * 4
2172  buf = get8(pp, desc_end);
2173  dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2174  } else {
2175  // 0 stands for None
2176  // Dolby Vision V1.2.93 profiles and levels
2178  }
2179 
2181  (uint8_t *)dovi, dovi_size);
2182  if (ret < 0) {
2183  av_free(dovi);
2184  return ret;
2185  }
2186 
2187  av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2188  "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2189  dovi->dv_version_major, dovi->dv_version_minor,
2190  dovi->dv_profile, dovi->dv_level,
2191  dovi->rpu_present_flag,
2192  dovi->el_present_flag,
2193  dovi->bl_present_flag,
2194  dovi->dv_bl_signal_compatibility_id);
2195  }
2196  break;
2197  default:
2198  break;
2199  }
2200  *pp = desc_end;
2201  return 0;
2202 }
2203 
2204 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2205  int stream_identifier, int pmt_stream_idx)
2206 {
2207  AVFormatContext *s = ts->stream;
2208  int i;
2209  AVStream *found = NULL;
2210 
2211  for (i = 0; i < s->nb_streams; i++) {
2212  AVStream *st = s->streams[i];
2213  if (st->program_num != programid)
2214  continue;
2215  if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2216  if (st->stream_identifier == stream_identifier+1) {
2217  found = st;
2218  break;
2219  }
2220  } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2221  found = st;
2222  break;
2223  }
2224  }
2225 
2226  if (found) {
2228  "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2230  i, found->id, pid);
2231  }
2232 
2233  return found;
2234 }
2235 
2236 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2237 {
2238  const uint8_t **pp = &p;
2239  const uint8_t *desc_list_end;
2240  const uint8_t *desc_end;
2241  int desc_list_len;
2242  int desc_len, desc_tag;
2243 
2244  desc_list_len = get16(pp, p_end);
2245  if (desc_list_len < 0)
2246  return -1;
2247  desc_list_len &= 0xfff;
2248  desc_list_end = p + desc_list_len;
2249  if (desc_list_end > p_end)
2250  return -1;
2251 
2252  while (1) {
2253  desc_tag = get8(pp, desc_list_end);
2254  if (desc_tag < 0)
2255  return -1;
2256  desc_len = get8(pp, desc_list_end);
2257  if (desc_len < 0)
2258  return -1;
2259  desc_end = *pp + desc_len;
2260  if (desc_end > desc_list_end)
2261  return -1;
2262 
2263  if (desc_tag == 0x52) {
2264  return get8(pp, desc_end);
2265  }
2266  *pp = desc_end;
2267  }
2268 
2269  return -1;
2270 }
2271 
2272 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2273 {
2274  return !(stream_type == 0x13 ||
2275  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2276 }
2277 
2278 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2279 {
2280  MpegTSContext *ts = filter->u.section_filter.opaque;
2281  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2282  SectionHeader h1, *h = &h1;
2283  PESContext *pes;
2284  AVStream *st;
2285  const uint8_t *p, *p_end, *desc_list_end;
2286  int program_info_length, pcr_pid, pid, stream_type;
2287  int desc_list_len;
2288  uint32_t prog_reg_desc = 0; /* registration descriptor */
2289  int stream_identifier = -1;
2290 
2291  int mp4_descr_count = 0;
2292  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2293  int i;
2294 
2295  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2296  hex_dump_debug(ts->stream, section, section_len);
2297 
2298  p_end = section + section_len - 4;
2299  p = section;
2300  if (parse_section_header(h, &p, p_end) < 0)
2301  return;
2302  if (h->tid != PMT_TID)
2303  return;
2304  if (skip_identical(h, tssf))
2305  return;
2306 
2307  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2308  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2309 
2310  if (!ts->scan_all_pmts && ts->skip_changes)
2311  return;
2312 
2313  if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2314  return;
2315  if (!ts->skip_clear)
2316  clear_program(ts, h->id);
2317 
2318  pcr_pid = get16(&p, p_end);
2319  if (pcr_pid < 0)
2320  return;
2321  pcr_pid &= 0x1fff;
2322  add_pid_to_pmt(ts, h->id, pcr_pid);
2323  update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2324 
2325  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2326 
2327  program_info_length = get16(&p, p_end);
2328  if (program_info_length < 0)
2329  return;
2330  program_info_length &= 0xfff;
2331  while (program_info_length >= 2) {
2332  uint8_t tag, len;
2333  tag = get8(&p, p_end);
2334  len = get8(&p, p_end);
2335 
2336  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2337 
2338  if (len > program_info_length - 2)
2339  // something else is broken, exit the program_descriptors_loop
2340  break;
2341  program_info_length -= len + 2;
2342  if (tag == 0x1d) { // IOD descriptor
2343  get8(&p, p_end); // scope
2344  get8(&p, p_end); // label
2345  len -= 2;
2346  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2347  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2348  } else if (tag == 0x05 && len >= 4) { // registration descriptor
2349  prog_reg_desc = bytestream_get_le32(&p);
2350  len -= 4;
2351  }
2352  p += len;
2353  }
2354  p += program_info_length;
2355  if (p >= p_end)
2356  goto out;
2357 
2358  // stop parsing after pmt, we found header
2359  if (!ts->pkt)
2360  ts->stop_parse = 2;
2361 
2362  set_pmt_found(ts, h->id);
2363 
2364 
2365  for (i = 0; ; i++) {
2366  st = 0;
2367  pes = NULL;
2368  stream_type = get8(&p, p_end);
2369  if (stream_type < 0)
2370  break;
2371  pid = get16(&p, p_end);
2372  if (pid < 0)
2373  goto out;
2374  pid &= 0x1fff;
2375  if (pid == ts->current_pid)
2376  goto out;
2377 
2378  if (ts->merge_pmt_versions)
2379  stream_identifier = parse_stream_identifier_desc(p, p_end);
2380 
2381  /* now create stream */
2382  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2383  pes = ts->pids[pid]->u.pes_filter.opaque;
2384  if (ts->merge_pmt_versions && !pes->st) {
2385  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2386  if (st) {
2387  pes->st = st;
2388  pes->stream_type = stream_type;
2389  pes->merged_st = 1;
2390  }
2391  }
2392  if (!pes->st) {
2393  pes->st = avformat_new_stream(pes->stream, NULL);
2394  if (!pes->st)
2395  goto out;
2396  pes->st->id = pes->pid;
2397  pes->st->program_num = h->id;
2398  pes->st->pmt_version = h->version;
2399  pes->st->pmt_stream_idx = i;
2400  }
2401  st = pes->st;
2402  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2403  if (ts->pids[pid])
2404  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2405  pes = add_pes_stream(ts, pid, pcr_pid);
2406  if (ts->merge_pmt_versions && pes && !pes->st) {
2407  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2408  if (st) {
2409  pes->st = st;
2410  pes->stream_type = stream_type;
2411  pes->merged_st = 1;
2412  }
2413  }
2414  if (pes && !pes->st) {
2415  st = avformat_new_stream(pes->stream, NULL);
2416  if (!st)
2417  goto out;
2418  st->id = pes->pid;
2419  st->program_num = h->id;
2420  st->pmt_version = h->version;
2421  st->pmt_stream_idx = i;
2422  }
2423  } else {
2424  int idx = ff_find_stream_index(ts->stream, pid);
2425  if (idx >= 0) {
2426  st = ts->stream->streams[idx];
2427  }
2428  if (ts->merge_pmt_versions && !st) {
2429  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2430  }
2431  if (!st) {
2432  st = avformat_new_stream(ts->stream, NULL);
2433  if (!st)
2434  goto out;
2435  st->id = pid;
2436  st->program_num = h->id;
2437  st->pmt_version = h->version;
2438  st->pmt_stream_idx = i;
2440  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2441  mpegts_find_stream_type(st, stream_type, SCTE_types);
2442  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2443  }
2444  }
2445  }
2446 
2447  if (!st)
2448  goto out;
2449 
2450  if (pes && !pes->stream_type)
2451  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2452 
2453  add_pid_to_pmt(ts, h->id, pid);
2454 
2456 
2457  desc_list_len = get16(&p, p_end);
2458  if (desc_list_len < 0)
2459  goto out;
2460  desc_list_len &= 0xfff;
2461  desc_list_end = p + desc_list_len;
2462  if (desc_list_end > p_end)
2463  goto out;
2464  for (;;) {
2465  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2466  desc_list_end, mp4_descr,
2467  mp4_descr_count, pid, ts) < 0)
2468  break;
2469 
2470  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2471  stream_type == 0x83 && pes->sub_st) {
2473  pes->sub_st->index);
2474  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2475  }
2476  }
2477  p = desc_list_end;
2478  }
2479 
2480  if (!ts->pids[pcr_pid])
2481  mpegts_open_pcr_filter(ts, pcr_pid);
2482 
2483 out:
2484  for (i = 0; i < mp4_descr_count; i++)
2485  av_free(mp4_descr[i].dec_config_descr);
2486 }
2487 
2488 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2489 {
2490  MpegTSContext *ts = filter->u.section_filter.opaque;
2491  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2492  SectionHeader h1, *h = &h1;
2493  const uint8_t *p, *p_end;
2494  int sid, pmt_pid;
2495  AVProgram *program;
2496 
2497  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2498  hex_dump_debug(ts->stream, section, section_len);
2499 
2500  p_end = section + section_len - 4;
2501  p = section;
2502  if (parse_section_header(h, &p, p_end) < 0)
2503  return;
2504  if (h->tid != PAT_TID)
2505  return;
2506  if (ts->skip_changes)
2507  return;
2508 
2509  if (skip_identical(h, tssf))
2510  return;
2511  ts->stream->ts_id = h->id;
2512 
2513  clear_programs(ts);
2514  for (;;) {
2515  sid = get16(&p, p_end);
2516  if (sid < 0)
2517  break;
2518  pmt_pid = get16(&p, p_end);
2519  if (pmt_pid < 0)
2520  break;
2521  pmt_pid &= 0x1fff;
2522 
2523  if (pmt_pid == ts->current_pid)
2524  break;
2525 
2526  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2527 
2528  if (sid == 0x0000) {
2529  /* NIT info */
2530  } else {
2531  MpegTSFilter *fil = ts->pids[pmt_pid];
2532  program = av_new_program(ts->stream, sid);
2533  if (program) {
2534  program->program_num = sid;
2535  program->pmt_pid = pmt_pid;
2536  }
2537  if (fil)
2538  if ( fil->type != MPEGTS_SECTION
2539  || fil->pid != pmt_pid
2540  || fil->u.section_filter.section_cb != pmt_cb)
2541  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2542 
2543  if (!ts->pids[pmt_pid])
2544  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2545  add_pat_entry(ts, sid);
2546  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2547  add_pid_to_pmt(ts, sid, pmt_pid);
2548  }
2549  }
2550 
2551  if (sid < 0) {
2552  int i,j;
2553  for (j=0; j<ts->stream->nb_programs; j++) {
2554  for (i = 0; i < ts->nb_prg; i++)
2555  if (ts->prg[i].id == ts->stream->programs[j]->id)
2556  break;
2557  if (i==ts->nb_prg && !ts->skip_clear)
2558  clear_avprogram(ts, ts->stream->programs[j]->id);
2559  }
2560  }
2561 }
2562 
2563 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2564 {
2565  MpegTSContext *ts = filter->u.section_filter.opaque;
2566  const uint8_t *p, *p_end;
2567  SectionHeader h1, *h = &h1;
2568 
2569  /*
2570  * Sometimes we receive EPG packets but SDT table do not have
2571  * eit_pres_following or eit_sched turned on, so we open EPG
2572  * stream directly here.
2573  */
2574  if (!ts->epg_stream) {
2576  if (!ts->epg_stream)
2577  return;
2578  ts->epg_stream->id = EIT_PID;
2581  }
2582 
2583  if (ts->epg_stream->discard == AVDISCARD_ALL)
2584  return;
2585 
2586  p_end = section + section_len - 4;
2587  p = section;
2588 
2589  if (parse_section_header(h, &p, p_end) < 0)
2590  return;
2591  if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2592  return;
2593 
2594  av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2595 
2596  /**
2597  * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2598  * is scrambled.
2599  */
2600  if (h->id == 0xFFFF) {
2601  av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2602  return;
2603  }
2604 
2605  /**
2606  * In case we receive an EPG packet before mpegts context is fully
2607  * initialized.
2608  */
2609  if (!ts->pkt)
2610  return;
2611 
2612  new_data_packet(section, section_len, ts->pkt);
2613  ts->pkt->stream_index = ts->epg_stream->index;
2614  ts->stop_parse = 1;
2615 }
2616 
2617 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2618 {
2619  MpegTSContext *ts = filter->u.section_filter.opaque;
2620  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2621  SectionHeader h1, *h = &h1;
2622  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2623  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2624  char *name, *provider_name;
2625 
2626  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2627  hex_dump_debug(ts->stream, section, section_len);
2628 
2629  p_end = section + section_len - 4;
2630  p = section;
2631  if (parse_section_header(h, &p, p_end) < 0)
2632  return;
2633  if (h->tid != SDT_TID)
2634  return;
2635  if (ts->skip_changes)
2636  return;
2637  if (skip_identical(h, tssf))
2638  return;
2639 
2640  onid = get16(&p, p_end);
2641  if (onid < 0)
2642  return;
2643  val = get8(&p, p_end);
2644  if (val < 0)
2645  return;
2646  for (;;) {
2647  sid = get16(&p, p_end);
2648  if (sid < 0)
2649  break;
2650  val = get8(&p, p_end);
2651  if (val < 0)
2652  break;
2653  desc_list_len = get16(&p, p_end);
2654  if (desc_list_len < 0)
2655  break;
2656  desc_list_len &= 0xfff;
2657  desc_list_end = p + desc_list_len;
2658  if (desc_list_end > p_end)
2659  break;
2660  for (;;) {
2661  desc_tag = get8(&p, desc_list_end);
2662  if (desc_tag < 0)
2663  break;
2664  desc_len = get8(&p, desc_list_end);
2665  desc_end = p + desc_len;
2666  if (desc_len < 0 || desc_end > desc_list_end)
2667  break;
2668 
2669  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2670  desc_tag, desc_len);
2671 
2672  switch (desc_tag) {
2673  case 0x48:
2674  service_type = get8(&p, p_end);
2675  if (service_type < 0)
2676  break;
2677  provider_name = getstr8(&p, p_end);
2678  if (!provider_name)
2679  break;
2680  name = getstr8(&p, p_end);
2681  if (name) {
2682  AVProgram *program = av_new_program(ts->stream, sid);
2683  if (program) {
2684  av_dict_set(&program->metadata, "service_name", name, 0);
2685  av_dict_set(&program->metadata, "service_provider",
2686  provider_name, 0);
2687  }
2688  }
2689  av_free(name);
2690  av_free(provider_name);
2691  break;
2692  default:
2693  break;
2694  }
2695  p = desc_end;
2696  }
2697  p = desc_list_end;
2698  }
2699 }
2700 
2701 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2702  const uint8_t *packet);
2703 
2704 /* handle one TS packet */
2705 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2706 {
2707  MpegTSFilter *tss;
2708  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2709  has_adaptation, has_payload;
2710  const uint8_t *p, *p_end;
2711 
2712  pid = AV_RB16(packet + 1) & 0x1fff;
2713  is_start = packet[1] & 0x40;
2714  tss = ts->pids[pid];
2715  if (ts->auto_guess && !tss && is_start) {
2716  add_pes_stream(ts, pid, -1);
2717  tss = ts->pids[pid];
2718  }
2719  if (!tss)
2720  return 0;
2721  if (is_start)
2722  tss->discard = discard_pid(ts, pid);
2723  if (tss->discard)
2724  return 0;
2725  ts->current_pid = pid;
2726 
2727  afc = (packet[3] >> 4) & 3;
2728  if (afc == 0) /* reserved value */
2729  return 0;
2730  has_adaptation = afc & 2;
2731  has_payload = afc & 1;
2732  is_discontinuity = has_adaptation &&
2733  packet[4] != 0 && /* with length > 0 */
2734  (packet[5] & 0x80); /* and discontinuity indicated */
2735 
2736  /* continuity check (currently not used) */
2737  cc = (packet[3] & 0xf);
2738  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2739  cc_ok = pid == 0x1FFF || // null packet PID
2740  is_discontinuity ||
2741  tss->last_cc < 0 ||
2742  expected_cc == cc;
2743 
2744  tss->last_cc = cc;
2745  if (!cc_ok) {
2746  av_log(ts->stream, AV_LOG_DEBUG,
2747  "Continuity check failed for pid %d expected %d got %d\n",
2748  pid, expected_cc, cc);
2749  if (tss->type == MPEGTS_PES) {
2750  PESContext *pc = tss->u.pes_filter.opaque;
2751  pc->flags |= AV_PKT_FLAG_CORRUPT;
2752  }
2753  }
2754 
2755  if (packet[1] & 0x80) {
2756  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2757  if (tss->type == MPEGTS_PES) {
2758  PESContext *pc = tss->u.pes_filter.opaque;
2759  pc->flags |= AV_PKT_FLAG_CORRUPT;
2760  }
2761  }
2762 
2763  p = packet + 4;
2764  if (has_adaptation) {
2765  int64_t pcr_h;
2766  int pcr_l;
2767  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2768  tss->last_pcr = pcr_h * 300 + pcr_l;
2769  /* skip adaptation field */
2770  p += p[0] + 1;
2771  }
2772  /* if past the end of packet, ignore */
2773  p_end = packet + TS_PACKET_SIZE;
2774  if (p >= p_end || !has_payload)
2775  return 0;
2776 
2777  if (pos >= 0) {
2778  av_assert0(pos >= TS_PACKET_SIZE);
2779  ts->pos47_full = pos - TS_PACKET_SIZE;
2780  }
2781 
2782  if (tss->type == MPEGTS_SECTION) {
2783  if (is_start) {
2784  /* pointer field present */
2785  len = *p++;
2786  if (len > p_end - p)
2787  return 0;
2788  if (len && cc_ok) {
2789  /* write remaining section bytes */
2790  write_section_data(ts, tss,
2791  p, len, 0);
2792  /* check whether filter has been closed */
2793  if (!ts->pids[pid])
2794  return 0;
2795  }
2796  p += len;
2797  if (p < p_end) {
2798  write_section_data(ts, tss,
2799  p, p_end - p, 1);
2800  }
2801  } else {
2802  if (cc_ok) {
2803  write_section_data(ts, tss,
2804  p, p_end - p, 0);
2805  }
2806  }
2807 
2808  // stop find_stream_info from waiting for more streams
2809  // when all programs have received a PMT
2810  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2811  int i;
2812  for (i = 0; i < ts->nb_prg; i++) {
2813  if (!ts->prg[i].pmt_found)
2814  break;
2815  }
2816  if (i == ts->nb_prg && ts->nb_prg > 0) {
2817  int types = 0;
2818  for (i = 0; i < ts->stream->nb_streams; i++) {
2819  AVStream *st = ts->stream->streams[i];
2820  if (st->codecpar->codec_type >= 0)
2821  types |= 1<<st->codecpar->codec_type;
2822  }
2823  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2824  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2826  }
2827  }
2828  }
2829 
2830  } else {
2831  int ret;
2832  // Note: The position here points actually behind the current packet.
2833  if (tss->type == MPEGTS_PES) {
2834  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2835  pos - ts->raw_packet_size)) < 0)
2836  return ret;
2837  }
2838  }
2839 
2840  return 0;
2841 }
2842 
2843 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2844 {
2845  MpegTSContext *ts = s->priv_data;
2846  AVIOContext *pb = s->pb;
2847  int c, i;
2848  uint64_t pos = avio_tell(pb);
2849  int64_t back = FFMIN(seekback, pos);
2850 
2851  //Special case for files like 01c56b0dc1.ts
2852  if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
2853  avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2854  return 0;
2855  }
2856 
2857  avio_seek(pb, -back, SEEK_CUR);
2858 
2859  for (i = 0; i < ts->resync_size; i++) {
2860  c = avio_r8(pb);
2861  if (avio_feof(pb))
2862  return AVERROR_EOF;
2863  if (c == 0x47) {
2864  int new_packet_size, ret;
2865  avio_seek(pb, -1, SEEK_CUR);
2866  pos = avio_tell(pb);
2868  if (ret < 0)
2869  return ret;
2870  new_packet_size = get_packet_size(s);
2871  if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2872  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2873  ts->raw_packet_size = new_packet_size;
2874  }
2875  avio_seek(pb, pos, SEEK_SET);
2876  return 0;
2877  }
2878  }
2879  av_log(s, AV_LOG_ERROR,
2880  "max resync size reached, could not find sync byte\n");
2881  /* no sync found */
2882  return AVERROR_INVALIDDATA;
2883 }
2884 
2885 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2886 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2887  const uint8_t **data)
2888 {
2889  AVIOContext *pb = s->pb;
2890  int len;
2891 
2892  for (;;) {
2893  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2894  if (len != TS_PACKET_SIZE)
2895  return len < 0 ? len : AVERROR_EOF;
2896  /* check packet sync byte */
2897  if ((*data)[0] != 0x47) {
2898  /* find a new packet start */
2899 
2900  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2901  return AVERROR(EAGAIN);
2902  else
2903  continue;
2904  } else {
2905  break;
2906  }
2907  }
2908  return 0;
2909 }
2910 
2911 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2912 {
2913  AVIOContext *pb = s->pb;
2914  int skip = raw_packet_size - TS_PACKET_SIZE;
2915  if (skip > 0)
2916  avio_skip(pb, skip);
2917 }
2918 
2919 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2920 {
2921  AVFormatContext *s = ts->stream;
2923  const uint8_t *data;
2924  int64_t packet_num;
2925  int ret = 0;
2926 
2927  if (avio_tell(s->pb) != ts->last_pos) {
2928  int i;
2929  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2930  /* seek detected, flush pes buffer */
2931  for (i = 0; i < NB_PID_MAX; i++) {
2932  if (ts->pids[i]) {
2933  if (ts->pids[i]->type == MPEGTS_PES) {
2934  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2935  av_buffer_unref(&pes->buffer);
2936  pes->data_index = 0;
2937  pes->state = MPEGTS_SKIP; /* skip until pes header */
2938  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2939  ts->pids[i]->u.section_filter.last_ver = -1;
2940  }
2941  ts->pids[i]->last_cc = -1;
2942  ts->pids[i]->last_pcr = -1;
2943  }
2944  }
2945  }
2946 
2947  ts->stop_parse = 0;
2948  packet_num = 0;
2949  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2950  for (;;) {
2951  packet_num++;
2952  if (nb_packets != 0 && packet_num >= nb_packets ||
2953  ts->stop_parse > 1) {
2954  ret = AVERROR(EAGAIN);
2955  break;
2956  }
2957  if (ts->stop_parse > 0)
2958  break;
2959 
2960  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2961  if (ret != 0)
2962  break;
2963  ret = handle_packet(ts, data, avio_tell(s->pb));
2965  if (ret != 0)
2966  break;
2967  }
2968  ts->last_pos = avio_tell(s->pb);
2969  return ret;
2970 }
2971 
2972 static int mpegts_probe(const AVProbeData *p)
2973 {
2974  const int size = p->buf_size;
2975  int maxscore = 0;
2976  int sumscore = 0;
2977  int i;
2978  int check_count = size / TS_FEC_PACKET_SIZE;
2979 #define CHECK_COUNT 10
2980 #define CHECK_BLOCK 100
2981 
2982  if (!check_count)
2983  return 0;
2984 
2985  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2986  int left = FFMIN(check_count - i, CHECK_BLOCK);
2987  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2988  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2989  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2990  score = FFMAX3(score, dvhs_score, fec_score);
2991  sumscore += score;
2992  maxscore = FFMAX(maxscore, score);
2993  }
2994 
2995  sumscore = sumscore * CHECK_COUNT / check_count;
2996  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2997 
2998  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2999 
3000  if (check_count > CHECK_COUNT && sumscore > 6) {
3001  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3002  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3003  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3004  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3005  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3006  } else if (sumscore > 6) {
3007  return 2;
3008  } else {
3009  return 0;
3010  }
3011 }
3012 
3013 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3014  * (-1) if not available */
3015 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3016 {
3017  int afc, len, flags;
3018  const uint8_t *p;
3019  unsigned int v;
3020 
3021  afc = (packet[3] >> 4) & 3;
3022  if (afc <= 1)
3023  return AVERROR_INVALIDDATA;
3024  p = packet + 4;
3025  len = p[0];
3026  p++;
3027  if (len == 0)
3028  return AVERROR_INVALIDDATA;
3029  flags = *p++;
3030  len--;
3031  if (!(flags & 0x10))
3032  return AVERROR_INVALIDDATA;
3033  if (len < 6)
3034  return AVERROR_INVALIDDATA;
3035  v = AV_RB32(p);
3036  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3037  *ppcr_low = ((p[4] & 1) << 8) | p[5];
3038  return 0;
3039 }
3040 
3042 
3043  /* NOTE: We attempt to seek on non-seekable files as well, as the
3044  * probe buffer usually is big enough. Only warn if the seek failed
3045  * on files where the seek should work. */
3046  if (avio_seek(pb, pos, SEEK_SET) < 0)
3047  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3048 }
3049 
3051 {
3052  MpegTSContext *ts = s->priv_data;
3053  AVIOContext *pb = s->pb;
3054  int64_t pos, probesize = s->probesize;
3055 
3057 
3058  if (ffio_ensure_seekback(pb, probesize) < 0)
3059  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3060 
3061  pos = avio_tell(pb);
3063  if (ts->raw_packet_size <= 0) {
3064  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3066  }
3067  ts->stream = s;
3068  ts->auto_guess = 0;
3069 
3070  if (s->iformat == &ff_mpegts_demuxer) {
3071  /* normal demux */
3072 
3073  /* first do a scan to get all the services */
3074  seek_back(s, pb, pos);
3075 
3079 
3080  handle_packets(ts, probesize / ts->raw_packet_size);
3081  /* if could not find service, enable auto_guess */
3082 
3083  ts->auto_guess = 1;
3084 
3085  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3086 
3088  } else {
3089  AVStream *st;
3090  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3091  int64_t pcrs[2], pcr_h;
3092  int packet_count[2];
3093  uint8_t packet[TS_PACKET_SIZE];
3094  const uint8_t *data;
3095 
3096  /* only read packets */
3097 
3098  st = avformat_new_stream(s, NULL);
3099  if (!st)
3100  return AVERROR(ENOMEM);
3101  avpriv_set_pts_info(st, 60, 1, 27000000);
3104 
3105  /* we iterate until we find two PCRs to estimate the bitrate */
3106  pcr_pid = -1;
3107  nb_pcrs = 0;
3108  nb_packets = 0;
3109  for (;;) {
3110  ret = read_packet(s, packet, ts->raw_packet_size, &data);
3111  if (ret < 0)
3112  return ret;
3113  pid = AV_RB16(data + 1) & 0x1fff;
3114  if ((pcr_pid == -1 || pcr_pid == pid) &&
3115  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3117  pcr_pid = pid;
3118  packet_count[nb_pcrs] = nb_packets;
3119  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3120  nb_pcrs++;
3121  if (nb_pcrs >= 2) {
3122  if (pcrs[1] - pcrs[0] > 0) {
3123  /* the difference needs to be positive to make sense for bitrate computation */
3124  break;
3125  } else {
3126  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3127  pcrs[0] = pcrs[1];
3128  packet_count[0] = packet_count[1];
3129  nb_pcrs--;
3130  }
3131  }
3132  } else {
3134  }
3135  nb_packets++;
3136  }
3137 
3138  /* NOTE1: the bitrate is computed without the FEC */
3139  /* NOTE2: it is only the bitrate of the start of the stream */
3140  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3141  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3142  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3143  st->codecpar->bit_rate = s->bit_rate;
3144  st->start_time = ts->cur_pcr;
3145  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3146  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3147  }
3148 
3149  seek_back(s, pb, pos);
3150  return 0;
3151 }
3152 
3153 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3154 
3156 {
3157  MpegTSContext *ts = s->priv_data;
3158  int ret, i;
3159  int64_t pcr_h, next_pcr_h, pos;
3160  int pcr_l, next_pcr_l;
3161  uint8_t pcr_buf[12];
3162  const uint8_t *data;
3163 
3164  if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3165  return ret;
3166  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3167  pkt->pos = avio_tell(s->pb);
3168  if (ret < 0) {
3169  return ret;
3170  }
3171  if (data != pkt->data)
3172  memcpy(pkt->data, data, TS_PACKET_SIZE);
3174  if (ts->mpeg2ts_compute_pcr) {
3175  /* compute exact PCR for each packet */
3176  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3177  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3178  pos = avio_tell(s->pb);
3179  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3180  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3181  avio_read(s->pb, pcr_buf, 12);
3182  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3183  /* XXX: not precise enough */
3184  ts->pcr_incr =
3185  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3186  (i + 1);
3187  break;
3188  }
3189  }
3190  avio_seek(s->pb, pos, SEEK_SET);
3191  /* no next PCR found: we use previous increment */
3192  ts->cur_pcr = pcr_h * 300 + pcr_l;
3193  }
3194  pkt->pts = ts->cur_pcr;
3195  pkt->duration = ts->pcr_incr;
3196  ts->cur_pcr += ts->pcr_incr;
3197  }
3198  pkt->stream_index = 0;
3199  return 0;
3200 }
3201 
3203 {
3204  MpegTSContext *ts = s->priv_data;
3205  int ret, i;
3206 
3207  pkt->size = -1;
3208  ts->pkt = pkt;
3209  ret = handle_packets(ts, 0);
3210  if (ret < 0) {
3211  av_packet_unref(ts->pkt);
3212  /* flush pes data left */
3213  for (i = 0; i < NB_PID_MAX; i++)
3214  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3215  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3216  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3217  ret = new_pes_packet(pes, pkt);
3218  if (ret < 0)
3219  return ret;
3220  pes->state = MPEGTS_SKIP;
3221  ret = 0;
3222  break;
3223  }
3224  }
3225  }
3226 
3227  if (!ret && pkt->size < 0)
3228  ret = AVERROR_INVALIDDATA;
3229  return ret;
3230 }
3231 
3232 static void mpegts_free(MpegTSContext *ts)
3233 {
3234  int i;
3235 
3236  clear_programs(ts);
3237 
3238  for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3239  av_buffer_pool_uninit(&ts->pools[i]);
3240 
3241  for (i = 0; i < NB_PID_MAX; i++)
3242  if (ts->pids[i])
3243  mpegts_close_filter(ts, ts->pids[i]);
3244 }
3245 
3247 {
3248  MpegTSContext *ts = s->priv_data;
3249  mpegts_free(ts);
3250  return 0;
3251 }
3252 
3254  int64_t *ppos, int64_t pos_limit)
3255 {
3256  MpegTSContext *ts = s->priv_data;
3257  int64_t pos, timestamp;
3258  uint8_t buf[TS_PACKET_SIZE];
3259  int pcr_l, pcr_pid =
3260  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3261  int pos47 = ts->pos47_full % ts->raw_packet_size;
3262  pos =
3263  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3264  ts->raw_packet_size + pos47;
3265  while(pos < pos_limit) {
3266  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3267  return AV_NOPTS_VALUE;
3268  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3269  return AV_NOPTS_VALUE;
3270  if (buf[0] != 0x47) {
3271  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3272  return AV_NOPTS_VALUE;
3273  pos = avio_tell(s->pb);
3274  continue;
3275  }
3276  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3277  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3278  *ppos = pos;
3279  return timestamp;
3280  }
3281  pos += ts->raw_packet_size;
3282  }
3283 
3284  return AV_NOPTS_VALUE;
3285 }
3286 
3287 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3288  int64_t *ppos, int64_t pos_limit)
3289 {
3290  MpegTSContext *ts = s->priv_data;
3291  int64_t pos;
3292  int pos47 = ts->pos47_full % ts->raw_packet_size;
3293  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3295  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3296  return AV_NOPTS_VALUE;
3297  while(pos < pos_limit) {
3298  int ret;
3299  AVPacket pkt;
3300  av_init_packet(&pkt);
3301  ret = av_read_frame(s, &pkt);
3302  if (ret < 0)
3303  return AV_NOPTS_VALUE;
3304  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3305  ff_reduce_index(s, pkt.stream_index);
3306  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3307  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3308  int64_t dts = pkt.dts;
3309  *ppos = pkt.pos;
3310  av_packet_unref(&pkt);
3311  return dts;
3312  }
3313  }
3314  pos = pkt.pos;
3315  av_packet_unref(&pkt);
3316  }
3317 
3318  return AV_NOPTS_VALUE;
3319 }
3320 
3321 /**************************************************************/
3322 /* parsing functions - called from other demuxers such as RTP */
3323 
3325 {
3326  MpegTSContext *ts;
3327 
3328  ts = av_mallocz(sizeof(MpegTSContext));
3329  if (!ts)
3330  return NULL;
3331  /* no stream case, currently used by RTP */
3333  ts->stream = s;
3334  ts->auto_guess = 1;
3335 
3339 
3340  return ts;
3341 }
3342 
3343 /* return the consumed length if a packet was output, or -1 if no
3344  * packet is output */
3346  const uint8_t *buf, int len)
3347 {
3348  int len1;
3349 
3350  len1 = len;
3351  ts->pkt = pkt;
3352  for (;;) {
3353  ts->stop_parse = 0;
3354  if (len < TS_PACKET_SIZE)
3355  return AVERROR_INVALIDDATA;
3356  if (buf[0] != 0x47) {
3357  buf++;
3358  len--;
3359  } else {
3360  handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3361  buf += TS_PACKET_SIZE;
3362  len -= TS_PACKET_SIZE;
3363  if (ts->stop_parse == 1)
3364  break;
3365  }
3366  }
3367  return len1 - len;
3368 }
3369 
3371 {
3372  mpegts_free(ts);
3373  av_free(ts);
3374 }
3375 
3376 AVInputFormat ff_mpegts_demuxer = {
3377  .name = "mpegts",
3378  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3379  .priv_data_size = sizeof(MpegTSContext),
3384  .read_timestamp = mpegts_get_dts,
3386  .priv_class = &mpegts_class,
3387 };
3388 
3390  .name = "mpegtsraw",
3391  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3392  .priv_data_size = sizeof(MpegTSContext),
3396  .read_timestamp = mpegts_get_dts,
3398  .priv_class = &mpegtsraw_class,
3399 };
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:3232
unsigned last_crc
Definition: mpegts.c:88
#define EIT_TID
Definition: mpegts.h:95
int64_t probesize
Maximum size of the data read from input for determining the input container format.
Definition: avformat.h:1517
uint8_t last_sec_num
Definition: mpegts.c:645
#define NULL
Definition: coverity.c:32
#define SDT_PID
Definition: mpegts.h:43
int64_t pos47_full
Definition: mpegts.c:126
int64_t last_pcr
Definition: mpegts.c:100
Bytestream IO Context.
Definition: avio.h:161
int es_id
Definition: mpegts.c:98
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int merge_pmt_versions
Definition: mpegts.c:155
int pmt_stream_idx
Definition: avformat.h:1122
#define PES_START_SIZE
Definition: mpegts.c:232
version
Definition: libkvazaar.c:292
static struct @314 state
#define PMT_TID
Definition: mpegts.h:81
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:303
int total_size
Definition: mpegts.c:248
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:490
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2911
int pmt_version
Definition: avformat.h:1121
AVOption.
Definition: opt.h:246
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:137
#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:60
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:3153
enum AVMediaType codec_type
Definition: mpegts.c:785
int64_t dts
Definition: mpegts.c:252
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1492
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: packet.h:375
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:4948
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:301
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:164
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1086
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:3324
#define avpriv_request_sample(...)
#define PROBE_PACKET_MARGIN
Definition: mpegts.c:61
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:574
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: avformat.h:1183
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
MpegTSPESFilter pes_filter
Definition: mpegts.c:104
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
int prefer_codec_framerate
Definition: internal.h:144
uint8_t version
Definition: mpegts.c:643
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
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:1473
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:694
AVStream * epg_stream
Definition: mpegts.c:169
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:834
DOVI configuration.
Contain timestamp estimated through PCR of program stream.
Definition: codec_id.h:540
AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:3376
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2617
void * priv_data
Definition: avformat.h:891
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:836
#define M4OD_TID
Definition: mpegts.h:84
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:754
discard all
Definition: avcodec.h:236
enum MpegTSFilterType type
Definition: mpegts.c:102
static AVPacket pkt
int pmt_version
Definition: avformat.h:1279
int pid
Definition: mpegts.c:237
struct Program * prg
Definition: mpegts.c:162
int64_t pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:138
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3202
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:238
SLConfigDescr sl
Definition: mpegts.h:168
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2843
int packet_seq_num_len
Definition: mpegts.h:161
AVDOVIDecoderConfigurationRecord * av_dovi_alloc(size_t *size)
Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its fields to default values...
Definition: dovi_meta.c:24
int es_id
Definition: mpegts.h:165
int inst_bitrate_len
Definition: mpegts.h:158
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:161
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:460
int last_cc
Definition: mpegts.c:99
Format I/O context.
Definition: avformat.h:1351
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2886
unsigned int nb_stream_indexes
Definition: avformat.h:1273
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:113
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
static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2563
Public dictionary API.
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:1035
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:196
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:166
static char buffer[20]
Definition: seek.c:32
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:3050
AVFormatContext * s
Definition: mpegts.c:1427
uint8_t
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: avformat.h:1115
#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:3287
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
AVOptions.
int au_seq_num_len
Definition: mpegts.h:160
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
#define f(width, name)
Definition: cbs_vp9.c:255
int stop_parse
stop parsing loop
Definition: mpegts.c:142
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1506
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: packet.h:373
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:1119
int id
Format-specific stream ID.
Definition: avformat.h:883
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
int use_au_start
Definition: mpegts.h:148
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:4526
int pmt_pid
Definition: avformat.h:1277
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1770
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:262
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
#define TS_PACKET_SIZE
Definition: mpegts.h:29
Public header for CRC hash function implementation.
Mp4Descr * descr
Definition: mpegts.c:1429
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:682
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1459
#define AV_DISPOSITION_DEPENDENT
dependent audio stream (mix_type=0 in mpegts)
Definition: avformat.h:859
uint8_t * data
Definition: packet.h:355
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:4625
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
MpegTSState
Definition: mpegts.c:223
uint32_t tag
Definition: movenc.c:1532
#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:97
#define FF_PROFILE_ARIB_PROFILE_C
Definition: avcodec.h:1976
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:3041
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1271
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1401
channels
Definition: aptx.h:33
unsigned int * stream_index
Definition: avformat.h:1272
int scan_all_pmts
Definition: mpegts.c:152
#define av_log(a,...)
#define PAT_TID
Definition: mpegts.h:79
The buffer pool.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:532
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3389
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1437
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: packet.h:215
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
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:566
enum AVCodecID codec_id
Definition: mpegts.c:786
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:449
DOVI configuration ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2, section 2.2 dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2, section 3.3 Tags are stored in struct AVDOVIDecoderConfigurationRecord.
Definition: packet.h:283
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:4234
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:515
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static const StreamType SCTE_types[]
Definition: mpegts.c:829
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1434
static const StreamType HDMV_types[]
Definition: mpegts.c:813
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:464
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:3246
unsigned int check_crc
Definition: mpegts.c:90
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3155
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
const uint8_t * code
Definition: spdifenc.c:413
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1363
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1971
const char * r
Definition: vf_curves.c:114
unsigned int pos
Definition: spdifenc.c:412
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned int nb_programs
Definition: avformat.h:1530
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:338
int pes_header_size
Definition: mpegts.c:249
simple assert() macros that are a bit more flexible than ISO C assert().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
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:93
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1268
#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:155
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1527
int flags
copied to the AVPacket flags
Definition: mpegts.c:247
int program_num
Definition: avformat.h:1276
#define MAX_SECTION_SIZE
Definition: mpegts.h:34
int current_pid
Definition: mpegts.c:167
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
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:206
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
const char * name
Definition: qsvenc.c:46
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:5032
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:3328
int64_t ts_packet_pos
position of first TS packet of this PES packet
Definition: mpegts.c:253
SectionCallback * section_cb
Definition: mpegts.c:92
static const StreamType REGD_types[]
Definition: mpegts.c:841
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:71
#define FFMIN(a, b)
Definition: common.h:96
static const StreamType MISC_types[]
Definition: mpegts.c:835
#define EIT_PID
Definition: mpegts.h:45
uint16_t id
Definition: mpegts.c:642
int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as stream side data.
Definition: utils.c:5525
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:1654
#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:2236
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:1864
#define MP4IODescrTag
Definition: isom.h:302
AVFormatContext * stream
Definition: mpegts.c:122
int skip_changes
Definition: mpegts.c:148
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:156
static int mpegts_probe(const AVProbeData *p)
Definition: mpegts.c:2972
#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:890
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:940
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1766
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1583
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1541
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:132
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:2204
MpegTSSectionFilter section_filter
Definition: mpegts.c:105
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1762
#define CHECK_BLOCK
int program_num
Details of the MPEG-TS program which created this stream.
Definition: avformat.h:1120
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:1028
uint8_t sec_num
Definition: mpegts.c:644
static int get_packet_size(AVFormatContext *s)
Definition: mpegts.c:603
int extended_stream_id
Definition: mpegts.c:250
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
int stream_type
Definition: mpegts.c:239
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:129
#define FF_ARRAY_ELEMS(a)
int raw_packet_size
raw packet size, including FEC if present
Definition: mpegts.c:124
static const StreamType ISO_types[]
Definition: mpegts.c:789
#define av_log2
Definition: intmath.h:83
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
int ts_id
Transport stream id.
Definition: avformat.h:1691
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:835
Stream structure.
Definition: avformat.h:876
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: codec_id.h:556
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
union MpegTSFilter::@265 u
int skip_unknown_pmt
Definition: mpegts.c:150
#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:167
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:857
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
unsigned int id
Definition: mpegts.c:111
#define MP4DecConfigDescrTag
Definition: isom.h:304
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
#define hex_dump_debug(class, buf, size)
Definition: internal.h:39
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static const StreamType METADATA_types[]
Definition: mpegts.c:857
int use_au_end
Definition: mpegts.h:149
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1469
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:988
int resync_size
Definition: mpegts.c:154
long long int64_t
Definition: coverity.c:34
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:234
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:659
#define MAX_LEVEL
Definition: mpegts.c:1425
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:109
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:3015
int use_timestamps
Definition: mpegts.h:152
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
int index
Definition: gxfenc.c:89
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:282
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2278
#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:189
cl_device_type type
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:3345
#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:553
static const StreamType DESC_types[]
Definition: mpegts.c:864
#define snprintf
Definition: snprintf.h:34
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int use_idle
Definition: mpegts.h:153
SLConfigDescr sl
Definition: mpegts.c:256
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1780
int dec_config_descr_len
Definition: mpegts.h:166
uint8_t * section_buf
Definition: mpegts.c:89
uint8_t tid
Definition: mpegts.c:641
AVDictionary * metadata
Definition: avformat.h:1274
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:576
int discard
Definition: mpegts.c:101
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
unsigned int end_of_section_reached
Definition: mpegts.c:91
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:1781
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:982
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:453
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:795
AVFormatContext * stream
Definition: mpegts.c:241
int skip_clear
Definition: mpegts.c:149
Main libavformat public API header.
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2488
static AVBufferRef * buffer_pool_get(MpegTSContext *ts, int size)
Definition: mpegts.c:1106
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:481
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:2705
int use_rand_acc_pt
Definition: mpegts.h:150
int data_index
Definition: mpegts.c:246
if(ret< 0)
Definition: vf_mcdeint.c:279
AVBufferPool * av_buffer_pool_init(int size, AVBufferRef *(*alloc)(int size))
Allocate and initialize a buffer pool.
Definition: buffer.c:242
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: avformat.h:1195
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:76
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:915
static double c[64]
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: codec_par.h:120
unsigned crc
Definition: mpegts.c:87
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:254
#define FF_PROFILE_ARIB_PROFILE_A
Definition: avcodec.h:1975
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:972
#define AV_DISPOSITION_STILL_IMAGE
still images in video stream (still_picture_flag=1 in mpegts)
Definition: avformat.h:860
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:2272
#define MAX_PES_PAYLOAD
Definition: mpegts.c:49
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
int pmt_found
have we found pmt for this program
Definition: mpegts.c:116
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:389
PESCallback * pes_cb
Definition: mpegts.c:75
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:648
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
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: codec_id.h:554
unsigned int nb_pids
Definition: mpegts.c:112
void * opaque
Definition: mpegts.c:76
#define OEITS_END_TID
Definition: mpegts.h:100
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:672
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:679
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1430
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:144
int len
#define PAT_PID
Definition: mpegts.h:37
void * priv_data
Format private data.
Definition: avformat.h:1379
int pcr_pid
Definition: avformat.h:1278
int64_t last_pos
to detect seek
Definition: mpegts.c:146
int timestamp_res
Definition: mpegts.h:154
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:289
AVBufferPool * pools[32]
Definition: mpegts.c:170
#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: codec_par.h:74
int use_padding
Definition: mpegts.h:151
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:169
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:81
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
Definition: codec_desc.c:3419
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:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)
Allocate a new AVBuffer, reusing an old buffer from the pool when available.
Definition: buffer.c:343
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:548
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1733
int degr_prior_len
Definition: mpegts.h:159
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1480
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:332
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1670
AVIOContext pb
Definition: mpegts.c:1428
int stream_index
Definition: packet.h:357
MpegTSFilterType
Definition: mpegts.c:63
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:51
#define MKTAG(a, b, c, d)
Definition: common.h:406
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:873
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:3370
int au_len
Definition: mpegts.h:157
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1133
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
#define R8_CHECK_CLIP_MAX(dst, maxv)
uint32_t stream_type
Definition: mpegts.c:784
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:687
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
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:981
#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:131
AVProgram ** programs
Definition: avformat.h:1531
#define MP4SLDescrTag
Definition: isom.h:306
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:135
#define NB_PID_MAX
Definition: mpegts.h:32
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2919
#define SDT_TID
Definition: mpegts.h:87
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:79
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:1636