FFmpeg  4.3
mpegts.c
Go to the documentation of this file.
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) */
100  int64_t last_pcr;
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 
126  int64_t pos47_full;
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  int 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 */
146  int64_t last_pos;
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 
514  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
515  return NULL;
516  sec = &filter->u.section_filter;
517  sec->section_cb = section_cb;
518  sec->opaque = opaque;
520  sec->check_crc = check_crc;
521  sec->last_ver = -1;
522 
523  if (!sec->section_buf) {
524  av_free(filter);
525  return NULL;
526  }
527  return filter;
528 }
529 
530 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
532  void *opaque)
533 {
535  MpegTSPESFilter *pes;
536 
537  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
538  return NULL;
539 
540  pes = &filter->u.pes_filter;
541  pes->pes_cb = pes_cb;
542  pes->opaque = opaque;
543  return filter;
544 }
545 
546 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
547 {
548  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
549 }
550 
552 {
553  int pid;
554 
555  pid = filter->pid;
556  if (filter->type == MPEGTS_SECTION)
558  else if (filter->type == MPEGTS_PES) {
559  PESContext *pes = filter->u.pes_filter.opaque;
560  av_buffer_unref(&pes->buffer);
561  /* referenced private data will be freed later in
562  * avformat_close_input (pes->st->priv_data == pes) */
563  if (!pes->st || pes->merged_st) {
564  av_freep(&filter->u.pes_filter.opaque);
565  }
566  }
567 
568  av_free(filter);
569  ts->pids[pid] = NULL;
570 }
571 
572 static int analyze(const uint8_t *buf, int size, int packet_size,
573  int probe)
574 {
575  int stat[TS_MAX_PACKET_SIZE];
576  int stat_all = 0;
577  int i;
578  int best_score = 0;
579 
580  memset(stat, 0, packet_size * sizeof(*stat));
581 
582  for (i = 0; i < size - 3; i++) {
583  if (buf[i] == 0x47) {
584  int pid = AV_RB16(buf+1) & 0x1FFF;
585  int asc = buf[i + 3] & 0x30;
586  if (!probe || pid == 0x1FFF || asc) {
587  int x = i % packet_size;
588  stat[x]++;
589  stat_all++;
590  if (stat[x] > best_score) {
591  best_score = stat[x];
592  }
593  }
594  }
595  }
596 
597  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
598 }
599 
600 /* autodetect fec presence */
602 {
603  int score, fec_score, dvhs_score;
604  int margin;
605  int ret;
606 
607  /*init buffer to store stream for probing */
608  uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
609  int buf_size = 0;
610 
611  while (buf_size < PROBE_PACKET_MAX_BUF) {
612  ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
613  if (ret < 0)
614  return AVERROR_INVALIDDATA;
615  buf_size += ret;
616 
617  score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
618  dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
619  fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
620  av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
621  buf_size, score, dvhs_score, fec_score);
622 
623  margin = mid_pred(score, fec_score, dvhs_score);
624 
625  if (buf_size < PROBE_PACKET_MAX_BUF)
626  margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
627 
628  if (score > margin)
629  return TS_PACKET_SIZE;
630  else if (dvhs_score > margin)
631  return TS_DVHS_PACKET_SIZE;
632  else if (fec_score > margin)
633  return TS_FEC_PACKET_SIZE;
634  }
635  return AVERROR_INVALIDDATA;
636 }
637 
638 typedef struct SectionHeader {
640  uint16_t id;
644 } SectionHeader;
645 
647 {
648  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
649  return 1;
650 
651  tssf->last_ver = h->version;
652  tssf->last_crc = tssf->crc;
653 
654  return 0;
655 }
656 
657 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
658 {
659  const uint8_t *p;
660  int c;
661 
662  p = *pp;
663  if (p >= p_end)
664  return AVERROR_INVALIDDATA;
665  c = *p++;
666  *pp = p;
667  return c;
668 }
669 
670 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
671 {
672  const uint8_t *p;
673  int c;
674 
675  p = *pp;
676  if (1 >= p_end - p)
677  return AVERROR_INVALIDDATA;
678  c = AV_RB16(p);
679  p += 2;
680  *pp = p;
681  return c;
682 }
683 
684 /* read and allocate a DVB string preceded by its length */
685 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
686 {
687  int len;
688  const uint8_t *p;
689  char *str;
690 
691  p = *pp;
692  len = get8(&p, p_end);
693  if (len < 0)
694  return NULL;
695  if (len > p_end - p)
696  return NULL;
697 #if CONFIG_ICONV
698  if (len) {
699  const char *encodings[] = {
700  "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
701  "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
702  "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
703  "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
704  "", "", "", "", "", "", "", ""
705  };
706  iconv_t cd;
707  char *in, *out;
708  size_t inlen = len, outlen = inlen * 6 + 1;
709  if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
710  char iso8859[12];
711  snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
712  inlen -= 3;
713  in = (char *)p + 3;
714  cd = iconv_open("UTF-8", iso8859);
715  } else if (p[0] < 0x20) {
716  inlen -= 1;
717  in = (char *)p + 1;
718  cd = iconv_open("UTF-8", encodings[*p]);
719  } else {
720  in = (char *)p;
721  cd = iconv_open("UTF-8", encodings[0]);
722  }
723  if (cd == (iconv_t)-1)
724  goto no_iconv;
725  str = out = av_malloc(outlen);
726  if (!str) {
727  iconv_close(cd);
728  return NULL;
729  }
730  if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
731  iconv_close(cd);
732  av_freep(&str);
733  goto no_iconv;
734  }
735  iconv_close(cd);
736  *out = 0;
737  *pp = p + len;
738  return str;
739  }
740 no_iconv:
741 #endif
742  str = av_malloc(len + 1);
743  if (!str)
744  return NULL;
745  memcpy(str, p, len);
746  str[len] = '\0';
747  p += len;
748  *pp = p;
749  return str;
750 }
751 
753  const uint8_t **pp, const uint8_t *p_end)
754 {
755  int val;
756 
757  val = get8(pp, p_end);
758  if (val < 0)
759  return val;
760  h->tid = val;
761  *pp += 2;
762  val = get16(pp, p_end);
763  if (val < 0)
764  return val;
765  h->id = val;
766  val = get8(pp, p_end);
767  if (val < 0)
768  return val;
769  h->version = (val >> 1) & 0x1f;
770  val = get8(pp, p_end);
771  if (val < 0)
772  return val;
773  h->sec_num = val;
774  val = get8(pp, p_end);
775  if (val < 0)
776  return val;
777  h->last_sec_num = val;
778  return 0;
779 }
780 
781 typedef struct StreamType {
782  uint32_t stream_type;
785 } StreamType;
786 
787 static const StreamType ISO_types[] = {
789  { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
791  { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
794  /* Makito encoder sets stream type 0x11 for AAC,
795  * so auto-detect LOAS/LATM instead of hardcoding it. */
796 #if !CONFIG_LOAS_DEMUXER
797  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
798 #endif
800  { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
801  { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
808  { 0 },
809 };
810 
811 static const StreamType HDMV_types[] = {
817  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
818  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
819  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
820  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
823  { 0 },
824 };
825 
826 /* SCTE types */
827 static const StreamType SCTE_types[] = {
829  { 0 },
830 };
831 
832 /* ATSC ? */
833 static const StreamType MISC_types[] = {
836  { 0 },
837 };
838 
839 static const StreamType REGD_types[] = {
840  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
841  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
842  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
843  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
844  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
845  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
846  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
847  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
848  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
849  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
850  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
851  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
852  { 0 },
853 };
854 
855 static const StreamType METADATA_types[] = {
856  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
857  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
858  { 0 },
859 };
860 
861 /* descriptor present */
862 static const StreamType DESC_types[] = {
863  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
864  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
867  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
868  { 0 },
869 };
870 
872  uint32_t stream_type,
873  const StreamType *types)
874 {
875  for (; types->stream_type; types++)
876  if (stream_type == types->stream_type) {
877  if (st->codecpar->codec_type != types->codec_type ||
878  st->codecpar->codec_id != types->codec_id) {
879  st->codecpar->codec_type = types->codec_type;
880  st->codecpar->codec_id = types->codec_id;
881  st->internal->need_context_update = 1;
882  }
883  st->request_probe = 0;
884  return;
885  }
886 }
887 
889  uint32_t stream_type, uint32_t prog_reg_desc)
890 {
891  int old_codec_type = st->codecpar->codec_type;
892  int old_codec_id = st->codecpar->codec_id;
893  int old_codec_tag = st->codecpar->codec_tag;
894 
895  if (avcodec_is_open(st->internal->avctx)) {
896  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
897  return 0;
898  }
899 
900  avpriv_set_pts_info(st, 33, 1, 90000);
901  st->priv_data = pes;
905  pes->st = st;
906  pes->stream_type = stream_type;
907 
908  av_log(pes->stream, AV_LOG_DEBUG,
909  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
910  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
911 
912  st->codecpar->codec_tag = pes->stream_type;
913 
914  mpegts_find_stream_type(st, pes->stream_type, ISO_types);
915  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
916  st->request_probe = 50;
917  if ((prog_reg_desc == AV_RL32("HDMV") ||
918  prog_reg_desc == AV_RL32("HDPR")) &&
920  mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
921  if (pes->stream_type == 0x83) {
922  // HDMV TrueHD streams also contain an AC3 coded version of the
923  // audio track - add a second stream for this
924  AVStream *sub_st;
925  // priv_data cannot be shared between streams
926  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
927  if (!sub_pes)
928  return AVERROR(ENOMEM);
929  memcpy(sub_pes, pes, sizeof(*sub_pes));
930 
931  sub_st = avformat_new_stream(pes->stream, NULL);
932  if (!sub_st) {
933  av_free(sub_pes);
934  return AVERROR(ENOMEM);
935  }
936 
937  sub_st->id = pes->pid;
938  avpriv_set_pts_info(sub_st, 33, 1, 90000);
939  sub_st->priv_data = sub_pes;
941  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
943  sub_pes->sub_st = pes->sub_st = sub_st;
944  }
945  }
946  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
947  mpegts_find_stream_type(st, pes->stream_type, MISC_types);
948  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
949  st->codecpar->codec_id = old_codec_id;
950  st->codecpar->codec_type = old_codec_type;
951  }
952  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
953  (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
954  st->probe_packets > 0 &&
955  stream_type == STREAM_TYPE_PRIVATE_DATA) {
959  }
960 
961  /* queue a context update if properties changed */
962  if (old_codec_type != st->codecpar->codec_type ||
963  old_codec_id != st->codecpar->codec_id ||
964  old_codec_tag != st->codecpar->codec_tag)
965  st->internal->need_context_update = 1;
966 
967  return 0;
968 }
969 
971 {
972  pes->pts = AV_NOPTS_VALUE;
973  pes->dts = AV_NOPTS_VALUE;
974  pes->data_index = 0;
975  pes->flags = 0;
976  av_buffer_unref(&pes->buffer);
977 }
978 
979 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
980 {
981  av_init_packet(pkt);
982  pkt->data = (uint8_t *)buffer;
983  pkt->size = len;
984 }
985 
987 {
988  uint8_t *sd;
989 
990  av_init_packet(pkt);
991 
992  pkt->buf = pes->buffer;
993  pkt->data = pes->buffer->data;
994  pkt->size = pes->data_index;
995 
996  if (pes->total_size != MAX_PES_PAYLOAD &&
997  pes->pes_header_size + pes->data_index != pes->total_size +
998  PES_START_SIZE) {
999  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1000  pes->flags |= AV_PKT_FLAG_CORRUPT;
1001  }
1002  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1003 
1004  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1005  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1006  pkt->stream_index = pes->sub_st->index;
1007  else
1008  pkt->stream_index = pes->st->index;
1009  pkt->pts = pes->pts;
1010  pkt->dts = pes->dts;
1011  /* store position of first TS packet of this PES packet */
1012  pkt->pos = pes->ts_packet_pos;
1013  pkt->flags = pes->flags;
1014 
1015  pes->buffer = NULL;
1017 
1019  if (!sd)
1020  return AVERROR(ENOMEM);
1021  *sd = pes->stream_id;
1022 
1023  return 0;
1024 }
1025 
1026 static uint64_t get_ts64(GetBitContext *gb, int bits)
1027 {
1028  if (get_bits_left(gb) < bits)
1029  return AV_NOPTS_VALUE;
1030  return get_bits64(gb, bits);
1031 }
1032 
1034  const uint8_t *buf, int buf_size)
1035 {
1036  GetBitContext gb;
1037  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1038  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1039  int dts_flag = -1, cts_flag = -1;
1040  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1041  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1042  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1043 
1044  memcpy(buf_padded, buf, buf_padded_size);
1045 
1046  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1047 
1048  if (sl->use_au_start)
1049  au_start_flag = get_bits1(&gb);
1050  if (sl->use_au_end)
1051  au_end_flag = get_bits1(&gb);
1052  if (!sl->use_au_start && !sl->use_au_end)
1053  au_start_flag = au_end_flag = 1;
1054  if (sl->ocr_len > 0)
1055  ocr_flag = get_bits1(&gb);
1056  if (sl->use_idle)
1057  idle_flag = get_bits1(&gb);
1058  if (sl->use_padding)
1059  padding_flag = get_bits1(&gb);
1060  if (padding_flag)
1061  padding_bits = get_bits(&gb, 3);
1062 
1063  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1064  if (sl->packet_seq_num_len)
1066  if (sl->degr_prior_len)
1067  if (get_bits1(&gb))
1068  skip_bits(&gb, sl->degr_prior_len);
1069  if (ocr_flag)
1070  skip_bits_long(&gb, sl->ocr_len);
1071  if (au_start_flag) {
1072  if (sl->use_rand_acc_pt)
1073  get_bits1(&gb);
1074  if (sl->au_seq_num_len > 0)
1075  skip_bits_long(&gb, sl->au_seq_num_len);
1076  if (sl->use_timestamps) {
1077  dts_flag = get_bits1(&gb);
1078  cts_flag = get_bits1(&gb);
1079  }
1080  }
1081  if (sl->inst_bitrate_len)
1082  inst_bitrate_flag = get_bits1(&gb);
1083  if (dts_flag == 1)
1084  dts = get_ts64(&gb, sl->timestamp_len);
1085  if (cts_flag == 1)
1086  cts = get_ts64(&gb, sl->timestamp_len);
1087  if (sl->au_len > 0)
1088  skip_bits_long(&gb, sl->au_len);
1089  if (inst_bitrate_flag)
1090  skip_bits_long(&gb, sl->inst_bitrate_len);
1091  }
1092 
1093  if (dts != AV_NOPTS_VALUE)
1094  pes->dts = dts;
1095  if (cts != AV_NOPTS_VALUE)
1096  pes->pts = cts;
1097 
1098  if (sl->timestamp_len && sl->timestamp_res)
1100 
1101  return (get_bits_count(&gb) + 7) >> 3;
1102 }
1103 
1105 {
1107  if (!ts->pools[index]) {
1108  int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1109  ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1110  if (!ts->pools[index])
1111  return NULL;
1112  }
1113  return av_buffer_pool_get(ts->pools[index]);
1114 }
1115 
1116 /* return non zero if a packet could be constructed */
1118  const uint8_t *buf, int buf_size, int is_start,
1119  int64_t pos)
1120 {
1121  PESContext *pes = filter->u.pes_filter.opaque;
1122  MpegTSContext *ts = pes->ts;
1123  const uint8_t *p;
1124  int ret, len, code;
1125 
1126  if (!ts->pkt)
1127  return 0;
1128 
1129  if (is_start) {
1130  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1131  ret = new_pes_packet(pes, ts->pkt);
1132  if (ret < 0)
1133  return ret;
1134  ts->stop_parse = 1;
1135  } else {
1137  }
1138  pes->state = MPEGTS_HEADER;
1139  pes->ts_packet_pos = pos;
1140  }
1141  p = buf;
1142  while (buf_size > 0) {
1143  switch (pes->state) {
1144  case MPEGTS_HEADER:
1145  len = PES_START_SIZE - pes->data_index;
1146  if (len > buf_size)
1147  len = buf_size;
1148  memcpy(pes->header + pes->data_index, p, len);
1149  pes->data_index += len;
1150  p += len;
1151  buf_size -= len;
1152  if (pes->data_index == PES_START_SIZE) {
1153  /* we got all the PES or section header. We can now
1154  * decide */
1155  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1156  pes->header[2] == 0x01) {
1157  /* it must be an MPEG-2 PES stream */
1158  code = pes->header[3] | 0x100;
1159  av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1160  code);
1161  pes->stream_id = pes->header[3];
1162 
1163  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1164  (!pes->sub_st ||
1165  pes->sub_st->discard == AVDISCARD_ALL)) ||
1166  code == 0x1be) /* padding_stream */
1167  goto skip;
1168 
1169  /* stream not present in PMT */
1170  if (!pes->st) {
1171  if (ts->skip_changes)
1172  goto skip;
1173  if (ts->merge_pmt_versions)
1174  goto skip; /* wait for PMT to merge new stream */
1175 
1176  pes->st = avformat_new_stream(ts->stream, NULL);
1177  if (!pes->st)
1178  return AVERROR(ENOMEM);
1179  pes->st->id = pes->pid;
1180  mpegts_set_stream_info(pes->st, pes, 0, 0);
1181  }
1182 
1183  pes->total_size = AV_RB16(pes->header + 4);
1184  /* NOTE: a zero total size means the PES size is
1185  * unbounded */
1186  if (!pes->total_size)
1187  pes->total_size = MAX_PES_PAYLOAD;
1188 
1189  /* allocate pes buffer */
1190  pes->buffer = buffer_pool_get(ts, pes->total_size);
1191  if (!pes->buffer)
1192  return AVERROR(ENOMEM);
1193 
1194  if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1195  code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1196  code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1197  code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1198  pes->state = MPEGTS_PESHEADER;
1199  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1200  av_log(pes->stream, AV_LOG_TRACE,
1201  "pid=%x stream_type=%x probing\n",
1202  pes->pid,
1203  pes->stream_type);
1204  pes->st->request_probe = 1;
1205  }
1206  } else {
1207  pes->pes_header_size = 6;
1208  pes->state = MPEGTS_PAYLOAD;
1209  pes->data_index = 0;
1210  }
1211  } else {
1212  /* otherwise, it should be a table */
1213  /* skip packet */
1214 skip:
1215  pes->state = MPEGTS_SKIP;
1216  continue;
1217  }
1218  }
1219  break;
1220  /**********************************************/
1221  /* PES packing parsing */
1222  case MPEGTS_PESHEADER:
1223  len = PES_HEADER_SIZE - pes->data_index;
1224  if (len < 0)
1225  return AVERROR_INVALIDDATA;
1226  if (len > buf_size)
1227  len = buf_size;
1228  memcpy(pes->header + pes->data_index, p, len);
1229  pes->data_index += len;
1230  p += len;
1231  buf_size -= len;
1232  if (pes->data_index == PES_HEADER_SIZE) {
1233  pes->pes_header_size = pes->header[8] + 9;
1235  }
1236  break;
1237  case MPEGTS_PESHEADER_FILL:
1238  len = pes->pes_header_size - pes->data_index;
1239  if (len < 0)
1240  return AVERROR_INVALIDDATA;
1241  if (len > buf_size)
1242  len = buf_size;
1243  memcpy(pes->header + pes->data_index, p, len);
1244  pes->data_index += len;
1245  p += len;
1246  buf_size -= len;
1247  if (pes->data_index == pes->pes_header_size) {
1248  const uint8_t *r;
1249  unsigned int flags, pes_ext, skip;
1250 
1251  flags = pes->header[7];
1252  r = pes->header + 9;
1253  pes->pts = AV_NOPTS_VALUE;
1254  pes->dts = AV_NOPTS_VALUE;
1255  if ((flags & 0xc0) == 0x80) {
1256  pes->dts = pes->pts = ff_parse_pes_pts(r);
1257  r += 5;
1258  } else if ((flags & 0xc0) == 0xc0) {
1259  pes->pts = ff_parse_pes_pts(r);
1260  r += 5;
1261  pes->dts = ff_parse_pes_pts(r);
1262  r += 5;
1263  }
1264  pes->extended_stream_id = -1;
1265  if (flags & 0x01) { /* PES extension */
1266  pes_ext = *r++;
1267  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1268  skip = (pes_ext >> 4) & 0xb;
1269  skip += skip & 0x9;
1270  r += skip;
1271  if ((pes_ext & 0x41) == 0x01 &&
1272  (r + 2) <= (pes->header + pes->pes_header_size)) {
1273  /* PES extension 2 */
1274  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1275  pes->extended_stream_id = r[1];
1276  }
1277  }
1278 
1279  /* we got the full header. We parse it and get the payload */
1280  pes->state = MPEGTS_PAYLOAD;
1281  pes->data_index = 0;
1282  if (pes->stream_type == 0x12 && buf_size > 0) {
1283  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1284  buf_size);
1285  pes->pes_header_size += sl_header_bytes;
1286  p += sl_header_bytes;
1287  buf_size -= sl_header_bytes;
1288  }
1289  if (pes->stream_type == 0x15 && buf_size >= 5) {
1290  /* skip metadata access unit header */
1291  pes->pes_header_size += 5;
1292  p += 5;
1293  buf_size -= 5;
1294  }
1295  if ( pes->ts->fix_teletext_pts
1298  ) {
1299  AVProgram *p = NULL;
1300  int pcr_found = 0;
1301  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1302  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1303  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1304  if (f) {
1305  AVStream *st = NULL;
1306  if (f->type == MPEGTS_PES) {
1307  PESContext *pcrpes = f->u.pes_filter.opaque;
1308  if (pcrpes)
1309  st = pcrpes->st;
1310  } else if (f->type == MPEGTS_PCR) {
1311  int i;
1312  for (i = 0; i < p->nb_stream_indexes; i++) {
1313  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1314  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1315  st = pst;
1316  }
1317  }
1318  if (f->last_pcr != -1 && !f->discard) {
1319  // teletext packets do not always have correct timestamps,
1320  // the standard says they should be handled after 40.6 ms at most,
1321  // and the pcr error to this packet should be no more than 100 ms.
1322  // TODO: we should interpolate the PCR, not just use the last one
1323  int64_t pcr = f->last_pcr / 300;
1324  pcr_found = 1;
1325  if (st) {
1328  }
1329  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1330  pes->pts = pes->dts = pcr;
1331  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1332  pes->dts > pcr + 3654 + 9000) {
1333  pes->pts = pes->dts = pcr + 3654 + 9000;
1334  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1335  pes->dts > pcr + 10*90000) { //10sec
1336  pes->pts = pes->dts = pcr + 3654 + 9000;
1337  }
1338  break;
1339  }
1340  }
1341  }
1342  }
1343 
1344  if (!pcr_found) {
1346  "Forcing DTS/PTS to be unset for a "
1347  "non-trustworthy PES packet for PID %d as "
1348  "PCR hasn't been received yet.\n",
1349  pes->pid);
1350  pes->dts = pes->pts = AV_NOPTS_VALUE;
1351  }
1352  }
1353  }
1354  break;
1355  case MPEGTS_PAYLOAD:
1356  if (pes->buffer) {
1357  if (pes->data_index > 0 &&
1358  pes->data_index + buf_size > pes->total_size) {
1359  ret = new_pes_packet(pes, ts->pkt);
1360  if (ret < 0)
1361  return ret;
1362  pes->total_size = MAX_PES_PAYLOAD;
1363  pes->buffer = buffer_pool_get(ts, pes->total_size);
1364  if (!pes->buffer)
1365  return AVERROR(ENOMEM);
1366  ts->stop_parse = 1;
1367  } else if (pes->data_index == 0 &&
1368  buf_size > pes->total_size) {
1369  // pes packet size is < ts size packet and pes data is padded with 0xff
1370  // not sure if this is legal in ts but see issue #2392
1371  buf_size = pes->total_size;
1372  }
1373  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1374  pes->data_index += buf_size;
1375  /* emit complete packets with known packet size
1376  * decreases demuxer delay for infrequent packets like subtitles from
1377  * a couple of seconds to milliseconds for properly muxed files.
1378  * total_size is the number of bytes following pes_packet_length
1379  * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1380  if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1381  pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1382  ts->stop_parse = 1;
1383  ret = new_pes_packet(pes, ts->pkt);
1384  if (ret < 0)
1385  return ret;
1386  }
1387  }
1388  buf_size = 0;
1389  break;
1390  case MPEGTS_SKIP:
1391  buf_size = 0;
1392  break;
1393  }
1394  }
1395 
1396  return 0;
1397 }
1398 
1399 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1400 {
1401  MpegTSFilter *tss;
1402  PESContext *pes;
1403 
1404  /* if no pid found, then add a pid context */
1405  pes = av_mallocz(sizeof(PESContext));
1406  if (!pes)
1407  return 0;
1408  pes->ts = ts;
1409  pes->stream = ts->stream;
1410  pes->pid = pid;
1411  pes->pcr_pid = pcr_pid;
1412  pes->state = MPEGTS_SKIP;
1413  pes->pts = AV_NOPTS_VALUE;
1414  pes->dts = AV_NOPTS_VALUE;
1415  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1416  if (!tss) {
1417  av_free(pes);
1418  return 0;
1419  }
1420  return pes;
1421 }
1422 
1423 #define MAX_LEVEL 4
1424 typedef struct MP4DescrParseContext {
1431  int level;
1434 
1436  const uint8_t *buf, unsigned size,
1437  Mp4Descr *descr, int max_descr_count)
1438 {
1439  int ret;
1440  if (size > (1 << 30))
1441  return AVERROR_INVALIDDATA;
1442 
1443  if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1444  NULL, NULL, NULL, NULL)) < 0)
1445  return ret;
1446 
1447  d->s = s;
1448  d->level = 0;
1449  d->descr_count = 0;
1450  d->descr = descr;
1451  d->active_descr = NULL;
1452  d->max_descr_count = max_descr_count;
1453 
1454  return 0;
1455 }
1456 
1457 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1458 {
1459  int64_t new_off = avio_tell(pb);
1460  (*len) -= new_off - *off;
1461  *off = new_off;
1462 }
1463 
1464 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1465  int target_tag);
1466 
1467 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1468 {
1469  while (len > 0) {
1470  int ret = parse_mp4_descr(d, off, len, 0);
1471  if (ret < 0)
1472  return ret;
1473  update_offsets(&d->pb, &off, &len);
1474  }
1475  return 0;
1476 }
1477 
1478 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1479 {
1480  avio_rb16(&d->pb); // ID
1481  avio_r8(&d->pb);
1482  avio_r8(&d->pb);
1483  avio_r8(&d->pb);
1484  avio_r8(&d->pb);
1485  avio_r8(&d->pb);
1486  update_offsets(&d->pb, &off, &len);
1487  return parse_mp4_descr_arr(d, off, len);
1488 }
1489 
1490 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1491 {
1492  int id_flags;
1493  if (len < 2)
1494  return 0;
1495  id_flags = avio_rb16(&d->pb);
1496  if (!(id_flags & 0x0020)) { // URL_Flag
1497  update_offsets(&d->pb, &off, &len);
1498  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1499  } else {
1500  return 0;
1501  }
1502 }
1503 
1504 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1505 {
1506  int es_id = 0;
1507  int ret = 0;
1508 
1509  if (d->descr_count >= d->max_descr_count)
1510  return AVERROR_INVALIDDATA;
1511  ff_mp4_parse_es_descr(&d->pb, &es_id);
1512  d->active_descr = d->descr + (d->descr_count++);
1513 
1514  d->active_descr->es_id = es_id;
1515  update_offsets(&d->pb, &off, &len);
1516  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1517  return ret;
1518  update_offsets(&d->pb, &off, &len);
1519  if (len > 0)
1520  ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1521  d->active_descr = NULL;
1522  return ret;
1523 }
1524 
1526  int len)
1527 {
1528  Mp4Descr *descr = d->active_descr;
1529  if (!descr)
1530  return AVERROR_INVALIDDATA;
1532  if (!descr->dec_config_descr)
1533  return AVERROR(ENOMEM);
1534  descr->dec_config_descr_len = len;
1535  avio_read(&d->pb, descr->dec_config_descr, len);
1536  return 0;
1537 }
1538 
1539 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1540 {
1541  Mp4Descr *descr = d->active_descr;
1542  int predefined;
1543  if (!descr)
1544  return AVERROR_INVALIDDATA;
1545 
1546 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1547  descr->sl.dst = avio_r8(&d->pb); \
1548  if (descr->sl.dst > maxv) { \
1549  descr->sl.dst = maxv; \
1550  return AVERROR_INVALIDDATA; \
1551  } \
1552 } while (0)
1553 
1554  predefined = avio_r8(&d->pb);
1555  if (!predefined) {
1556  int lengths;
1557  int flags = avio_r8(&d->pb);
1558  descr->sl.use_au_start = !!(flags & 0x80);
1559  descr->sl.use_au_end = !!(flags & 0x40);
1560  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1561  descr->sl.use_padding = !!(flags & 0x08);
1562  descr->sl.use_timestamps = !!(flags & 0x04);
1563  descr->sl.use_idle = !!(flags & 0x02);
1564  descr->sl.timestamp_res = avio_rb32(&d->pb);
1565  avio_rb32(&d->pb);
1566  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1567  R8_CHECK_CLIP_MAX(ocr_len, 63);
1568  R8_CHECK_CLIP_MAX(au_len, 31);
1569  descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1570  lengths = avio_rb16(&d->pb);
1571  descr->sl.degr_prior_len = lengths >> 12;
1572  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1573  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1574  } else if (!d->predefined_SLConfigDescriptor_seen){
1575  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1577  }
1578  return 0;
1579 }
1580 
1581 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1582  int target_tag)
1583 {
1584  int tag;
1585  int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1586  int ret = 0;
1587 
1588  update_offsets(&d->pb, &off, &len);
1589  if (len < 0 || len1 > len || len1 <= 0) {
1590  av_log(d->s, AV_LOG_ERROR,
1591  "Tag %x length violation new length %d bytes remaining %d\n",
1592  tag, len1, len);
1593  return AVERROR_INVALIDDATA;
1594  }
1595 
1596  if (d->level++ >= MAX_LEVEL) {
1597  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1598  ret = AVERROR_INVALIDDATA;
1599  goto done;
1600  }
1601 
1602  if (target_tag && tag != target_tag) {
1603  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1604  target_tag);
1605  ret = AVERROR_INVALIDDATA;
1606  goto done;
1607  }
1608 
1609  switch (tag) {
1610  case MP4IODescrTag:
1611  ret = parse_MP4IODescrTag(d, off, len1);
1612  break;
1613  case MP4ODescrTag:
1614  ret = parse_MP4ODescrTag(d, off, len1);
1615  break;
1616  case MP4ESDescrTag:
1617  ret = parse_MP4ESDescrTag(d, off, len1);
1618  break;
1619  case MP4DecConfigDescrTag:
1620  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1621  break;
1622  case MP4SLDescrTag:
1623  ret = parse_MP4SLDescrTag(d, off, len1);
1624  break;
1625  }
1626 
1627 
1628 done:
1629  d->level--;
1630  avio_seek(&d->pb, off + len1, SEEK_SET);
1631  return ret;
1632 }
1633 
1634 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1635  Mp4Descr *descr, int *descr_count, int max_descr_count)
1636 {
1638  int ret;
1639 
1640  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1641  if (ret < 0)
1642  return ret;
1643 
1644  ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1645 
1646  *descr_count = d.descr_count;
1647  return ret;
1648 }
1649 
1650 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1651  Mp4Descr *descr, int *descr_count, int max_descr_count)
1652 {
1654  int ret;
1655 
1656  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1657  if (ret < 0)
1658  return ret;
1659 
1660  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1661 
1662  *descr_count = d.descr_count;
1663  return ret;
1664 }
1665 
1667  int section_len)
1668 {
1669  MpegTSContext *ts = filter->u.section_filter.opaque;
1670  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1671  SectionHeader h;
1672  const uint8_t *p, *p_end;
1673  AVIOContext pb;
1674  int mp4_descr_count = 0;
1675  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1676  int i, pid;
1677  AVFormatContext *s = ts->stream;
1678 
1679  p_end = section + section_len - 4;
1680  p = section;
1681  if (parse_section_header(&h, &p, p_end) < 0)
1682  return;
1683  if (h.tid != M4OD_TID)
1684  return;
1685  if (skip_identical(&h, tssf))
1686  return;
1687 
1688  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1690 
1691  for (pid = 0; pid < NB_PID_MAX; pid++) {
1692  if (!ts->pids[pid])
1693  continue;
1694  for (i = 0; i < mp4_descr_count; i++) {
1695  PESContext *pes;
1696  AVStream *st;
1697  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1698  continue;
1699  if (ts->pids[pid]->type != MPEGTS_PES) {
1700  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1701  continue;
1702  }
1703  pes = ts->pids[pid]->u.pes_filter.opaque;
1704  st = pes->st;
1705  if (!st)
1706  continue;
1707 
1708  pes->sl = mp4_descr[i].sl;
1709 
1710  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1711  mp4_descr[i].dec_config_descr_len, 0,
1712  NULL, NULL, NULL, NULL);
1713  ff_mp4_read_dec_config_descr(s, st, &pb);
1714  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1715  st->codecpar->extradata_size > 0)
1716  st->need_parsing = 0;
1717  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1718  st->codecpar->extradata_size > 0)
1719  st->need_parsing = 0;
1720 
1722  st->internal->need_context_update = 1;
1723  }
1724  }
1725  for (i = 0; i < mp4_descr_count; i++)
1726  av_free(mp4_descr[i].dec_config_descr);
1727 }
1728 
1730  int section_len)
1731 {
1732  AVProgram *prg = NULL;
1733  MpegTSContext *ts = filter->u.section_filter.opaque;
1734 
1735  int idx = ff_find_stream_index(ts->stream, filter->pid);
1736  if (idx < 0)
1737  return;
1738 
1739  /**
1740  * In case we receive an SCTE-35 packet before mpegts context is fully
1741  * initialized.
1742  */
1743  if (!ts->pkt)
1744  return;
1745 
1746  new_data_packet(section, section_len, ts->pkt);
1747  ts->pkt->stream_index = idx;
1748  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1749  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1750  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1751  if (f && f->last_pcr != -1)
1752  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1753  }
1754  ts->stop_parse = 1;
1755 
1756 }
1757 
1759  1, 0, 1, 1, 2, 2, 2, 3, 3
1760 };
1761 
1762 static const uint8_t opus_stream_cnt[9] = {
1763  1, 1, 1, 2, 2, 3, 4, 4, 5,
1764 };
1765 
1766 static const uint8_t opus_channel_map[8][8] = {
1767  { 0 },
1768  { 0,1 },
1769  { 0,2,1 },
1770  { 0,1,2,3 },
1771  { 0,4,1,2,3 },
1772  { 0,4,1,2,3,5 },
1773  { 0,4,1,2,3,5,6 },
1774  { 0,6,1,2,3,4,5,7 },
1775 };
1776 
1778  const uint8_t **pp, const uint8_t *desc_list_end,
1779  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1780  MpegTSContext *ts)
1781 {
1782  const uint8_t *desc_end;
1783  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1784  char language[252];
1785  int i;
1786 
1787  desc_tag = get8(pp, desc_list_end);
1788  if (desc_tag < 0)
1789  return AVERROR_INVALIDDATA;
1790  desc_len = get8(pp, desc_list_end);
1791  if (desc_len < 0)
1792  return AVERROR_INVALIDDATA;
1793  desc_end = *pp + desc_len;
1794  if (desc_end > desc_list_end)
1795  return AVERROR_INVALIDDATA;
1796 
1797  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1798 
1799  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1800  stream_type == STREAM_TYPE_PRIVATE_DATA)
1801  mpegts_find_stream_type(st, desc_tag, DESC_types);
1802 
1803  switch (desc_tag) {
1804  case 0x02: /* video stream descriptor */
1805  if (get8(pp, desc_end) & 0x1) {
1807  }
1808  break;
1809  case 0x1E: /* SL descriptor */
1810  desc_es_id = get16(pp, desc_end);
1811  if (desc_es_id < 0)
1812  break;
1813  if (ts && ts->pids[pid])
1814  ts->pids[pid]->es_id = desc_es_id;
1815  for (i = 0; i < mp4_descr_count; i++)
1816  if (mp4_descr[i].dec_config_descr_len &&
1817  mp4_descr[i].es_id == desc_es_id) {
1818  AVIOContext pb;
1819  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1820  mp4_descr[i].dec_config_descr_len, 0,
1821  NULL, NULL, NULL, NULL);
1822  ff_mp4_read_dec_config_descr(fc, st, &pb);
1823  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1824  st->codecpar->extradata_size > 0) {
1825  st->need_parsing = 0;
1826  st->internal->need_context_update = 1;
1827  }
1829  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1830  }
1831  break;
1832  case 0x1F: /* FMC descriptor */
1833  if (get16(pp, desc_end) < 0)
1834  break;
1835  if (mp4_descr_count > 0 &&
1837  (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1838  st->request_probe > 0) &&
1839  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1840  AVIOContext pb;
1841  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1842  mp4_descr->dec_config_descr_len, 0,
1843  NULL, NULL, NULL, NULL);
1844  ff_mp4_read_dec_config_descr(fc, st, &pb);
1845  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1846  st->codecpar->extradata_size > 0) {
1847  st->request_probe = st->need_parsing = 0;
1849  st->internal->need_context_update = 1;
1850  }
1851  }
1852  break;
1853  case 0x56: /* DVB teletext descriptor */
1854  {
1855  uint8_t *extradata = NULL;
1856  int language_count = desc_len / 5, ret;
1857 
1858  if (desc_len > 0 && desc_len % 5 != 0)
1859  return AVERROR_INVALIDDATA;
1860 
1861  if (language_count > 0) {
1862  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1863  av_assert0(language_count <= sizeof(language) / 4);
1864 
1865  if (st->codecpar->extradata == NULL) {
1866  ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1867  if (ret < 0)
1868  return ret;
1869  }
1870 
1871  if (st->codecpar->extradata_size < language_count * 2)
1872  return AVERROR_INVALIDDATA;
1873 
1874  extradata = st->codecpar->extradata;
1875 
1876  for (i = 0; i < language_count; i++) {
1877  language[i * 4 + 0] = get8(pp, desc_end);
1878  language[i * 4 + 1] = get8(pp, desc_end);
1879  language[i * 4 + 2] = get8(pp, desc_end);
1880  language[i * 4 + 3] = ',';
1881 
1882  memcpy(extradata, *pp, 2);
1883  extradata += 2;
1884 
1885  *pp += 2;
1886  }
1887 
1888  language[i * 4 - 1] = 0;
1889  av_dict_set(&st->metadata, "language", language, 0);
1890  st->internal->need_context_update = 1;
1891  }
1892  }
1893  break;
1894  case 0x59: /* subtitling descriptor */
1895  {
1896  /* 8 bytes per DVB subtitle substream data:
1897  * ISO_639_language_code (3 bytes),
1898  * subtitling_type (1 byte),
1899  * composition_page_id (2 bytes),
1900  * ancillary_page_id (2 bytes) */
1901  int language_count = desc_len / 8, ret;
1902 
1903  if (desc_len > 0 && desc_len % 8 != 0)
1904  return AVERROR_INVALIDDATA;
1905 
1906  if (language_count > 1) {
1907  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1908  }
1909 
1910  if (language_count > 0) {
1911  uint8_t *extradata;
1912 
1913  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1914  av_assert0(language_count <= sizeof(language) / 4);
1915 
1916  if (st->codecpar->extradata == NULL) {
1917  ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1918  if (ret < 0)
1919  return ret;
1920  }
1921 
1922  if (st->codecpar->extradata_size < language_count * 5)
1923  return AVERROR_INVALIDDATA;
1924 
1925  extradata = st->codecpar->extradata;
1926 
1927  for (i = 0; i < language_count; i++) {
1928  language[i * 4 + 0] = get8(pp, desc_end);
1929  language[i * 4 + 1] = get8(pp, desc_end);
1930  language[i * 4 + 2] = get8(pp, desc_end);
1931  language[i * 4 + 3] = ',';
1932 
1933  /* hearing impaired subtitles detection using subtitling_type */
1934  switch (*pp[0]) {
1935  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1936  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1937  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1938  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1939  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1940  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1942  break;
1943  }
1944 
1945  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1946  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1947  extradata += 5;
1948 
1949  *pp += 4;
1950  }
1951 
1952  language[i * 4 - 1] = 0;
1953  av_dict_set(&st->metadata, "language", language, 0);
1954  st->internal->need_context_update = 1;
1955  }
1956  }
1957  break;
1958  case 0x0a: /* ISO 639 language descriptor */
1959  for (i = 0; i + 4 <= desc_len; i += 4) {
1960  language[i + 0] = get8(pp, desc_end);
1961  language[i + 1] = get8(pp, desc_end);
1962  language[i + 2] = get8(pp, desc_end);
1963  language[i + 3] = ',';
1964  switch (get8(pp, desc_end)) {
1965  case 0x01:
1967  break;
1968  case 0x02:
1970  break;
1971  case 0x03:
1974  break;
1975  }
1976  }
1977  if (i && language[0]) {
1978  language[i - 1] = 0;
1979  /* don't overwrite language, as it may already have been set by
1980  * another, more specific descriptor (e.g. supplementary audio) */
1981  av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1982  }
1983  break;
1984  case 0x05: /* registration descriptor */
1985  st->codecpar->codec_tag = bytestream_get_le32(pp);
1986  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1987  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1988  mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1989  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1990  st->request_probe = 50;
1991  }
1992  break;
1993  case 0x52: /* stream identifier descriptor */
1994  st->stream_identifier = 1 + get8(pp, desc_end);
1995  break;
1996  case 0x26: /* metadata descriptor */
1997  if (get16(pp, desc_end) == 0xFFFF)
1998  *pp += 4;
1999  if (get8(pp, desc_end) == 0xFF) {
2000  st->codecpar->codec_tag = bytestream_get_le32(pp);
2001  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2002  mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2003  }
2004  break;
2005  case 0x7f: /* DVB extension descriptor */
2006  ext_desc_tag = get8(pp, desc_end);
2007  if (ext_desc_tag < 0)
2008  return AVERROR_INVALIDDATA;
2009  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2010  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2011  if (!st->codecpar->extradata) {
2014  if (!st->codecpar->extradata)
2015  return AVERROR(ENOMEM);
2016 
2019 
2020  channel_config_code = get8(pp, desc_end);
2021  if (channel_config_code < 0)
2022  return AVERROR_INVALIDDATA;
2023  if (channel_config_code <= 0x8) {
2024  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2025  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2026  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2027  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2028  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2029  } else {
2030  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2031  }
2033  st->internal->need_context_update = 1;
2034  }
2035  }
2036  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2037  int flags;
2038 
2039  if (desc_len < 1)
2040  return AVERROR_INVALIDDATA;
2041  flags = get8(pp, desc_end);
2042 
2043  if ((flags & 0x80) == 0) /* mix_type */
2045 
2046  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2047  case 0x01:
2050  break;
2051  case 0x02:
2053  break;
2054  case 0x03:
2056  break;
2057  }
2058 
2059  if (flags & 0x01) { /* language_code_present */
2060  if (desc_len < 4)
2061  return AVERROR_INVALIDDATA;
2062  language[0] = get8(pp, desc_end);
2063  language[1] = get8(pp, desc_end);
2064  language[2] = get8(pp, desc_end);
2065  language[3] = 0;
2066 
2067  /* This language always has to override a possible
2068  * ISO 639 language descriptor language */
2069  if (language[0])
2070  av_dict_set(&st->metadata, "language", language, 0);
2071  }
2072  }
2073  break;
2074  case 0x6a: /* ac-3_descriptor */
2075  {
2076  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2077  if (component_type_flag) {
2078  int component_type = get8(pp, desc_end);
2079  int service_type_mask = 0x38; // 0b00111000
2080  int service_type = ((component_type & service_type_mask) >> 3);
2081  if (service_type == 0x02 /* 0b010 */) {
2083  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2084  }
2085  }
2086  }
2087  break;
2088  case 0x7a: /* enhanced_ac-3_descriptor */
2089  {
2090  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2091  if (component_type_flag) {
2092  int component_type = get8(pp, desc_end);
2093  int service_type_mask = 0x38; // 0b00111000
2094  int service_type = ((component_type & service_type_mask) >> 3);
2095  if (service_type == 0x02 /* 0b010 */) {
2097  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2098  }
2099  }
2100  }
2101  break;
2102  case 0xfd: /* ARIB data coding type descriptor */
2103  // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2104  // for captions
2105  if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2106  // This structure is defined in STD-B10, part 1, listing 5.4 and
2107  // part 2, 6.2.20).
2108  // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2109  // Component tag limits are documented in TR-B14, fascicle 2,
2110  // Vol. 3, Section 2, 4.2.8.1
2111  int actual_component_tag = st->stream_identifier - 1;
2112  int picked_profile = FF_PROFILE_UNKNOWN;
2113  int data_component_id = get16(pp, desc_end);
2114  if (data_component_id < 0)
2115  return AVERROR_INVALIDDATA;
2116 
2117  switch (data_component_id) {
2118  case 0x0008:
2119  // [0x30..0x37] are component tags utilized for
2120  // non-mobile captioning service ("profile A").
2121  if (actual_component_tag >= 0x30 &&
2122  actual_component_tag <= 0x37) {
2123  picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2124  }
2125  break;
2126  case 0x0012:
2127  // component tag 0x87 signifies a mobile/partial reception
2128  // (1seg) captioning service ("profile C").
2129  if (actual_component_tag == 0x87) {
2130  picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2131  }
2132  break;
2133  default:
2134  break;
2135  }
2136 
2137  if (picked_profile == FF_PROFILE_UNKNOWN)
2138  break;
2139 
2142  st->codecpar->profile = picked_profile;
2143  st->request_probe = 0;
2144  }
2145  break;
2146  case 0xb0: /* DOVI video stream descriptor */
2147  {
2148  uint32_t buf;
2150  size_t dovi_size;
2151  int ret;
2152  if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2153  return AVERROR_INVALIDDATA;
2154 
2155  dovi = av_dovi_alloc(&dovi_size);
2156  if (!dovi)
2157  return AVERROR(ENOMEM);
2158 
2159  dovi->dv_version_major = get8(pp, desc_end);
2160  dovi->dv_version_minor = get8(pp, desc_end);
2161  buf = get16(pp, desc_end);
2162  dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2163  dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2164  dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2165  dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2166  dovi->bl_present_flag = buf & 0x01; // 1 bit
2167  if (desc_end - *pp >= 20) { // 4 + 4 * 4
2168  buf = get8(pp, desc_end);
2169  dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2170  } else {
2171  // 0 stands for None
2172  // Dolby Vision V1.2.93 profiles and levels
2174  }
2175 
2177  (uint8_t *)dovi, dovi_size);
2178  if (ret < 0) {
2179  av_free(dovi);
2180  return ret;
2181  }
2182 
2183  av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2184  "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2185  dovi->dv_version_major, dovi->dv_version_minor,
2186  dovi->dv_profile, dovi->dv_level,
2187  dovi->rpu_present_flag,
2188  dovi->el_present_flag,
2189  dovi->bl_present_flag,
2190  dovi->dv_bl_signal_compatibility_id);
2191  }
2192  break;
2193  default:
2194  break;
2195  }
2196  *pp = desc_end;
2197  return 0;
2198 }
2199 
2200 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2201  int stream_identifier, int pmt_stream_idx)
2202 {
2203  AVFormatContext *s = ts->stream;
2204  int i;
2205  AVStream *found = NULL;
2206 
2207  for (i = 0; i < s->nb_streams; i++) {
2208  AVStream *st = s->streams[i];
2209  if (st->program_num != programid)
2210  continue;
2211  if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2212  if (st->stream_identifier == stream_identifier+1) {
2213  found = st;
2214  break;
2215  }
2216  } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2217  found = st;
2218  break;
2219  }
2220  }
2221 
2222  if (found) {
2224  "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2226  i, found->id, pid);
2227  }
2228 
2229  return found;
2230 }
2231 
2232 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2233 {
2234  const uint8_t **pp = &p;
2235  const uint8_t *desc_list_end;
2236  const uint8_t *desc_end;
2237  int desc_list_len;
2238  int desc_len, desc_tag;
2239 
2240  desc_list_len = get16(pp, p_end);
2241  if (desc_list_len < 0)
2242  return -1;
2243  desc_list_len &= 0xfff;
2244  desc_list_end = p + desc_list_len;
2245  if (desc_list_end > p_end)
2246  return -1;
2247 
2248  while (1) {
2249  desc_tag = get8(pp, desc_list_end);
2250  if (desc_tag < 0)
2251  return -1;
2252  desc_len = get8(pp, desc_list_end);
2253  if (desc_len < 0)
2254  return -1;
2255  desc_end = *pp + desc_len;
2256  if (desc_end > desc_list_end)
2257  return -1;
2258 
2259  if (desc_tag == 0x52) {
2260  return get8(pp, desc_end);
2261  }
2262  *pp = desc_end;
2263  }
2264 
2265  return -1;
2266 }
2267 
2268 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2269 {
2270  return !(stream_type == 0x13 ||
2271  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2272 }
2273 
2274 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2275 {
2276  MpegTSContext *ts = filter->u.section_filter.opaque;
2277  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2278  SectionHeader h1, *h = &h1;
2279  PESContext *pes;
2280  AVStream *st;
2281  const uint8_t *p, *p_end, *desc_list_end;
2282  int program_info_length, pcr_pid, pid, stream_type;
2283  int desc_list_len;
2284  uint32_t prog_reg_desc = 0; /* registration descriptor */
2285  int stream_identifier = -1;
2286 
2287  int mp4_descr_count = 0;
2288  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2289  int i;
2290 
2291  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2292  hex_dump_debug(ts->stream, section, section_len);
2293 
2294  p_end = section + section_len - 4;
2295  p = section;
2296  if (parse_section_header(h, &p, p_end) < 0)
2297  return;
2298  if (h->tid != PMT_TID)
2299  return;
2300  if (skip_identical(h, tssf))
2301  return;
2302 
2303  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2304  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2305 
2306  if (!ts->scan_all_pmts && ts->skip_changes)
2307  return;
2308 
2309  if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2310  return;
2311  if (!ts->skip_clear)
2312  clear_program(ts, h->id);
2313 
2314  pcr_pid = get16(&p, p_end);
2315  if (pcr_pid < 0)
2316  return;
2317  pcr_pid &= 0x1fff;
2318  add_pid_to_pmt(ts, h->id, pcr_pid);
2319  update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2320 
2321  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2322 
2323  program_info_length = get16(&p, p_end);
2324  if (program_info_length < 0)
2325  return;
2326  program_info_length &= 0xfff;
2327  while (program_info_length >= 2) {
2328  uint8_t tag, len;
2329  tag = get8(&p, p_end);
2330  len = get8(&p, p_end);
2331 
2332  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2333 
2334  if (len > program_info_length - 2)
2335  // something else is broken, exit the program_descriptors_loop
2336  break;
2337  program_info_length -= len + 2;
2338  if (tag == 0x1d) { // IOD descriptor
2339  get8(&p, p_end); // scope
2340  get8(&p, p_end); // label
2341  len -= 2;
2342  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2343  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2344  } else if (tag == 0x05 && len >= 4) { // registration descriptor
2345  prog_reg_desc = bytestream_get_le32(&p);
2346  len -= 4;
2347  }
2348  p += len;
2349  }
2350  p += program_info_length;
2351  if (p >= p_end)
2352  goto out;
2353 
2354  // stop parsing after pmt, we found header
2355  if (!ts->stream->nb_streams)
2356  ts->stop_parse = 2;
2357 
2358  set_pmt_found(ts, h->id);
2359 
2360 
2361  for (i = 0; ; i++) {
2362  st = 0;
2363  pes = NULL;
2364  stream_type = get8(&p, p_end);
2365  if (stream_type < 0)
2366  break;
2367  pid = get16(&p, p_end);
2368  if (pid < 0)
2369  goto out;
2370  pid &= 0x1fff;
2371  if (pid == ts->current_pid)
2372  goto out;
2373 
2374  if (ts->merge_pmt_versions)
2375  stream_identifier = parse_stream_identifier_desc(p, p_end);
2376 
2377  /* now create stream */
2378  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2379  pes = ts->pids[pid]->u.pes_filter.opaque;
2380  if (ts->merge_pmt_versions && !pes->st) {
2381  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2382  if (st) {
2383  pes->st = st;
2384  pes->stream_type = stream_type;
2385  pes->merged_st = 1;
2386  }
2387  }
2388  if (!pes->st) {
2389  pes->st = avformat_new_stream(pes->stream, NULL);
2390  if (!pes->st)
2391  goto out;
2392  pes->st->id = pes->pid;
2393  pes->st->program_num = h->id;
2394  pes->st->pmt_version = h->version;
2395  pes->st->pmt_stream_idx = i;
2396  }
2397  st = pes->st;
2398  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2399  if (ts->pids[pid])
2400  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2401  pes = add_pes_stream(ts, pid, pcr_pid);
2402  if (ts->merge_pmt_versions && pes && !pes->st) {
2403  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2404  if (st) {
2405  pes->st = st;
2406  pes->stream_type = stream_type;
2407  pes->merged_st = 1;
2408  }
2409  }
2410  if (pes && !pes->st) {
2411  st = avformat_new_stream(pes->stream, NULL);
2412  if (!st)
2413  goto out;
2414  st->id = pes->pid;
2415  st->program_num = h->id;
2416  st->pmt_version = h->version;
2417  st->pmt_stream_idx = i;
2418  }
2419  } else {
2420  int idx = ff_find_stream_index(ts->stream, pid);
2421  if (idx >= 0) {
2422  st = ts->stream->streams[idx];
2423  }
2424  if (ts->merge_pmt_versions && !st) {
2425  st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2426  }
2427  if (!st) {
2428  st = avformat_new_stream(ts->stream, NULL);
2429  if (!st)
2430  goto out;
2431  st->id = pid;
2432  st->program_num = h->id;
2433  st->pmt_version = h->version;
2434  st->pmt_stream_idx = i;
2436  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2437  mpegts_find_stream_type(st, stream_type, SCTE_types);
2438  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2439  }
2440  }
2441  }
2442 
2443  if (!st)
2444  goto out;
2445 
2446  if (pes && !pes->stream_type)
2447  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2448 
2449  add_pid_to_pmt(ts, h->id, pid);
2450 
2452 
2453  desc_list_len = get16(&p, p_end);
2454  if (desc_list_len < 0)
2455  goto out;
2456  desc_list_len &= 0xfff;
2457  desc_list_end = p + desc_list_len;
2458  if (desc_list_end > p_end)
2459  goto out;
2460  for (;;) {
2461  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2462  desc_list_end, mp4_descr,
2463  mp4_descr_count, pid, ts) < 0)
2464  break;
2465 
2466  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2467  stream_type == 0x83 && pes->sub_st) {
2469  pes->sub_st->index);
2470  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2471  }
2472  }
2473  p = desc_list_end;
2474  }
2475 
2476  if (!ts->pids[pcr_pid])
2477  mpegts_open_pcr_filter(ts, pcr_pid);
2478 
2479 out:
2480  for (i = 0; i < mp4_descr_count; i++)
2481  av_free(mp4_descr[i].dec_config_descr);
2482 }
2483 
2484 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2485 {
2486  MpegTSContext *ts = filter->u.section_filter.opaque;
2487  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2488  SectionHeader h1, *h = &h1;
2489  const uint8_t *p, *p_end;
2490  int sid, pmt_pid;
2491  AVProgram *program;
2492 
2493  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2494  hex_dump_debug(ts->stream, section, section_len);
2495 
2496  p_end = section + section_len - 4;
2497  p = section;
2498  if (parse_section_header(h, &p, p_end) < 0)
2499  return;
2500  if (h->tid != PAT_TID)
2501  return;
2502  if (ts->skip_changes)
2503  return;
2504 
2505  if (skip_identical(h, tssf))
2506  return;
2507  ts->stream->ts_id = h->id;
2508 
2509  clear_programs(ts);
2510  for (;;) {
2511  sid = get16(&p, p_end);
2512  if (sid < 0)
2513  break;
2514  pmt_pid = get16(&p, p_end);
2515  if (pmt_pid < 0)
2516  break;
2517  pmt_pid &= 0x1fff;
2518 
2519  if (pmt_pid == ts->current_pid)
2520  break;
2521 
2522  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2523 
2524  if (sid == 0x0000) {
2525  /* NIT info */
2526  } else {
2527  MpegTSFilter *fil = ts->pids[pmt_pid];
2528  program = av_new_program(ts->stream, sid);
2529  if (program) {
2530  program->program_num = sid;
2531  program->pmt_pid = pmt_pid;
2532  }
2533  if (fil)
2534  if ( fil->type != MPEGTS_SECTION
2535  || fil->pid != pmt_pid
2536  || fil->u.section_filter.section_cb != pmt_cb)
2537  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2538 
2539  if (!ts->pids[pmt_pid])
2540  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2541  add_pat_entry(ts, sid);
2542  add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2543  add_pid_to_pmt(ts, sid, pmt_pid);
2544  }
2545  }
2546 
2547  if (sid < 0) {
2548  int i,j;
2549  for (j=0; j<ts->stream->nb_programs; j++) {
2550  for (i = 0; i < ts->nb_prg; i++)
2551  if (ts->prg[i].id == ts->stream->programs[j]->id)
2552  break;
2553  if (i==ts->nb_prg && !ts->skip_clear)
2554  clear_avprogram(ts, ts->stream->programs[j]->id);
2555  }
2556  }
2557 }
2558 
2559 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2560 {
2561  MpegTSContext *ts = filter->u.section_filter.opaque;
2562  const uint8_t *p, *p_end;
2563  SectionHeader h1, *h = &h1;
2564 
2565  /*
2566  * Sometimes we receive EPG packets but SDT table do not have
2567  * eit_pres_following or eit_sched turned on, so we open EPG
2568  * stream directly here.
2569  */
2570  if (!ts->epg_stream) {
2572  if (!ts->epg_stream)
2573  return;
2574  ts->epg_stream->id = EIT_PID;
2577  }
2578 
2579  if (ts->epg_stream->discard == AVDISCARD_ALL)
2580  return;
2581 
2582  p_end = section + section_len - 4;
2583  p = section;
2584 
2585  if (parse_section_header(h, &p, p_end) < 0)
2586  return;
2587  if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2588  return;
2589 
2590  av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2591 
2592  /**
2593  * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2594  * is scrambled.
2595  */
2596  if (h->id == 0xFFFF) {
2597  av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2598  return;
2599  }
2600 
2601  /**
2602  * In case we receive an EPG packet before mpegts context is fully
2603  * initialized.
2604  */
2605  if (!ts->pkt)
2606  return;
2607 
2608  new_data_packet(section, section_len, ts->pkt);
2609  ts->pkt->stream_index = ts->epg_stream->index;
2610  ts->stop_parse = 1;
2611 }
2612 
2613 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2614 {
2615  MpegTSContext *ts = filter->u.section_filter.opaque;
2616  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2617  SectionHeader h1, *h = &h1;
2618  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2619  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2620  char *name, *provider_name;
2621 
2622  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2623  hex_dump_debug(ts->stream, section, section_len);
2624 
2625  p_end = section + section_len - 4;
2626  p = section;
2627  if (parse_section_header(h, &p, p_end) < 0)
2628  return;
2629  if (h->tid != SDT_TID)
2630  return;
2631  if (ts->skip_changes)
2632  return;
2633  if (skip_identical(h, tssf))
2634  return;
2635 
2636  onid = get16(&p, p_end);
2637  if (onid < 0)
2638  return;
2639  val = get8(&p, p_end);
2640  if (val < 0)
2641  return;
2642  for (;;) {
2643  sid = get16(&p, p_end);
2644  if (sid < 0)
2645  break;
2646  val = get8(&p, p_end);
2647  if (val < 0)
2648  break;
2649  desc_list_len = get16(&p, p_end);
2650  if (desc_list_len < 0)
2651  break;
2652  desc_list_len &= 0xfff;
2653  desc_list_end = p + desc_list_len;
2654  if (desc_list_end > p_end)
2655  break;
2656  for (;;) {
2657  desc_tag = get8(&p, desc_list_end);
2658  if (desc_tag < 0)
2659  break;
2660  desc_len = get8(&p, desc_list_end);
2661  desc_end = p + desc_len;
2662  if (desc_len < 0 || desc_end > desc_list_end)
2663  break;
2664 
2665  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2666  desc_tag, desc_len);
2667 
2668  switch (desc_tag) {
2669  case 0x48:
2670  service_type = get8(&p, p_end);
2671  if (service_type < 0)
2672  break;
2673  provider_name = getstr8(&p, p_end);
2674  if (!provider_name)
2675  break;
2676  name = getstr8(&p, p_end);
2677  if (name) {
2678  AVProgram *program = av_new_program(ts->stream, sid);
2679  if (program) {
2680  av_dict_set(&program->metadata, "service_name", name, 0);
2681  av_dict_set(&program->metadata, "service_provider",
2682  provider_name, 0);
2683  }
2684  }
2685  av_free(name);
2686  av_free(provider_name);
2687  break;
2688  default:
2689  break;
2690  }
2691  p = desc_end;
2692  }
2693  p = desc_list_end;
2694  }
2695 }
2696 
2697 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2698  const uint8_t *packet);
2699 
2700 /* handle one TS packet */
2701 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2702 {
2703  MpegTSFilter *tss;
2704  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2705  has_adaptation, has_payload;
2706  const uint8_t *p, *p_end;
2707 
2708  pid = AV_RB16(packet + 1) & 0x1fff;
2709  is_start = packet[1] & 0x40;
2710  tss = ts->pids[pid];
2711  if (ts->auto_guess && !tss && is_start) {
2712  add_pes_stream(ts, pid, -1);
2713  tss = ts->pids[pid];
2714  }
2715  if (!tss)
2716  return 0;
2717  if (is_start)
2718  tss->discard = discard_pid(ts, pid);
2719  if (tss->discard)
2720  return 0;
2721  ts->current_pid = pid;
2722 
2723  afc = (packet[3] >> 4) & 3;
2724  if (afc == 0) /* reserved value */
2725  return 0;
2726  has_adaptation = afc & 2;
2727  has_payload = afc & 1;
2728  is_discontinuity = has_adaptation &&
2729  packet[4] != 0 && /* with length > 0 */
2730  (packet[5] & 0x80); /* and discontinuity indicated */
2731 
2732  /* continuity check (currently not used) */
2733  cc = (packet[3] & 0xf);
2734  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2735  cc_ok = pid == 0x1FFF || // null packet PID
2736  is_discontinuity ||
2737  tss->last_cc < 0 ||
2738  expected_cc == cc;
2739 
2740  tss->last_cc = cc;
2741  if (!cc_ok) {
2742  av_log(ts->stream, AV_LOG_DEBUG,
2743  "Continuity check failed for pid %d expected %d got %d\n",
2744  pid, expected_cc, cc);
2745  if (tss->type == MPEGTS_PES) {
2746  PESContext *pc = tss->u.pes_filter.opaque;
2747  pc->flags |= AV_PKT_FLAG_CORRUPT;
2748  }
2749  }
2750 
2751  if (packet[1] & 0x80) {
2752  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2753  if (tss->type == MPEGTS_PES) {
2754  PESContext *pc = tss->u.pes_filter.opaque;
2755  pc->flags |= AV_PKT_FLAG_CORRUPT;
2756  }
2757  }
2758 
2759  p = packet + 4;
2760  if (has_adaptation) {
2761  int64_t pcr_h;
2762  int pcr_l;
2763  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2764  tss->last_pcr = pcr_h * 300 + pcr_l;
2765  /* skip adaptation field */
2766  p += p[0] + 1;
2767  }
2768  /* if past the end of packet, ignore */
2769  p_end = packet + TS_PACKET_SIZE;
2770  if (p >= p_end || !has_payload)
2771  return 0;
2772 
2773  if (pos >= 0) {
2774  av_assert0(pos >= TS_PACKET_SIZE);
2775  ts->pos47_full = pos - TS_PACKET_SIZE;
2776  }
2777 
2778  if (tss->type == MPEGTS_SECTION) {
2779  if (is_start) {
2780  /* pointer field present */
2781  len = *p++;
2782  if (len > p_end - p)
2783  return 0;
2784  if (len && cc_ok) {
2785  /* write remaining section bytes */
2786  write_section_data(ts, tss,
2787  p, len, 0);
2788  /* check whether filter has been closed */
2789  if (!ts->pids[pid])
2790  return 0;
2791  }
2792  p += len;
2793  if (p < p_end) {
2794  write_section_data(ts, tss,
2795  p, p_end - p, 1);
2796  }
2797  } else {
2798  if (cc_ok) {
2799  write_section_data(ts, tss,
2800  p, p_end - p, 0);
2801  }
2802  }
2803 
2804  // stop find_stream_info from waiting for more streams
2805  // when all programs have received a PMT
2806  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2807  int i;
2808  for (i = 0; i < ts->nb_prg; i++) {
2809  if (!ts->prg[i].pmt_found)
2810  break;
2811  }
2812  if (i == ts->nb_prg && ts->nb_prg > 0) {
2813  int types = 0;
2814  for (i = 0; i < ts->stream->nb_streams; i++) {
2815  AVStream *st = ts->stream->streams[i];
2816  if (st->codecpar->codec_type >= 0)
2817  types |= 1<<st->codecpar->codec_type;
2818  }
2819  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2820  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2822  }
2823  }
2824  }
2825 
2826  } else {
2827  int ret;
2828  // Note: The position here points actually behind the current packet.
2829  if (tss->type == MPEGTS_PES) {
2830  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2831  pos - ts->raw_packet_size)) < 0)
2832  return ret;
2833  }
2834  }
2835 
2836  return 0;
2837 }
2838 
2839 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2840 {
2841  MpegTSContext *ts = s->priv_data;
2842  AVIOContext *pb = s->pb;
2843  int c, i;
2844  uint64_t pos = avio_tell(pb);
2845  int64_t back = FFMIN(seekback, pos);
2846 
2847  //Special case for files like 01c56b0dc1.ts
2848  if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2849  avio_seek(pb, 12 - back, SEEK_CUR);
2850  return 0;
2851  }
2852 
2853  avio_seek(pb, -back, SEEK_CUR);
2854 
2855  for (i = 0; i < ts->resync_size; i++) {
2856  c = avio_r8(pb);
2857  if (avio_feof(pb))
2858  return AVERROR_EOF;
2859  if (c == 0x47) {
2860  int new_packet_size, ret;
2861  avio_seek(pb, -1, SEEK_CUR);
2862  pos = avio_tell(pb);
2864  if (ret < 0)
2865  return ret;
2866  new_packet_size = get_packet_size(s);
2867  if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2868  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2869  ts->raw_packet_size = new_packet_size;
2870  }
2871  avio_seek(pb, pos, SEEK_SET);
2872  return 0;
2873  }
2874  }
2875  av_log(s, AV_LOG_ERROR,
2876  "max resync size reached, could not find sync byte\n");
2877  /* no sync found */
2878  return AVERROR_INVALIDDATA;
2879 }
2880 
2881 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2882 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2883  const uint8_t **data)
2884 {
2885  AVIOContext *pb = s->pb;
2886  int len;
2887 
2888  for (;;) {
2889  len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2890  if (len != TS_PACKET_SIZE)
2891  return len < 0 ? len : AVERROR_EOF;
2892  /* check packet sync byte */
2893  if ((*data)[0] != 0x47) {
2894  /* find a new packet start */
2895 
2896  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2897  return AVERROR(EAGAIN);
2898  else
2899  continue;
2900  } else {
2901  break;
2902  }
2903  }
2904  return 0;
2905 }
2906 
2907 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2908 {
2909  AVIOContext *pb = s->pb;
2910  int skip = raw_packet_size - TS_PACKET_SIZE;
2911  if (skip > 0)
2912  avio_skip(pb, skip);
2913 }
2914 
2915 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2916 {
2917  AVFormatContext *s = ts->stream;
2919  const uint8_t *data;
2920  int64_t packet_num;
2921  int ret = 0;
2922 
2923  if (avio_tell(s->pb) != ts->last_pos) {
2924  int i;
2925  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2926  /* seek detected, flush pes buffer */
2927  for (i = 0; i < NB_PID_MAX; i++) {
2928  if (ts->pids[i]) {
2929  if (ts->pids[i]->type == MPEGTS_PES) {
2930  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2931  av_buffer_unref(&pes->buffer);
2932  pes->data_index = 0;
2933  pes->state = MPEGTS_SKIP; /* skip until pes header */
2934  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2935  ts->pids[i]->u.section_filter.last_ver = -1;
2936  }
2937  ts->pids[i]->last_cc = -1;
2938  ts->pids[i]->last_pcr = -1;
2939  }
2940  }
2941  }
2942 
2943  ts->stop_parse = 0;
2944  packet_num = 0;
2945  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2946  for (;;) {
2947  packet_num++;
2948  if (nb_packets != 0 && packet_num >= nb_packets ||
2949  ts->stop_parse > 1) {
2950  ret = AVERROR(EAGAIN);
2951  break;
2952  }
2953  if (ts->stop_parse > 0)
2954  break;
2955 
2956  ret = read_packet(s, packet, ts->raw_packet_size, &data);
2957  if (ret != 0)
2958  break;
2959  ret = handle_packet(ts, data, avio_tell(s->pb));
2961  if (ret != 0)
2962  break;
2963  }
2964  ts->last_pos = avio_tell(s->pb);
2965  return ret;
2966 }
2967 
2968 static int mpegts_probe(const AVProbeData *p)
2969 {
2970  const int size = p->buf_size;
2971  int maxscore = 0;
2972  int sumscore = 0;
2973  int i;
2974  int check_count = size / TS_FEC_PACKET_SIZE;
2975 #define CHECK_COUNT 10
2976 #define CHECK_BLOCK 100
2977 
2978  if (!check_count)
2979  return 0;
2980 
2981  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2982  int left = FFMIN(check_count - i, CHECK_BLOCK);
2983  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2984  int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2985  int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2986  score = FFMAX3(score, dvhs_score, fec_score);
2987  sumscore += score;
2988  maxscore = FFMAX(maxscore, score);
2989  }
2990 
2991  sumscore = sumscore * CHECK_COUNT / check_count;
2992  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2993 
2994  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2995 
2996  if (check_count > CHECK_COUNT && sumscore > 6) {
2997  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2998  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2999  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3000  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3001  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3002  } else if (sumscore > 6) {
3003  return 2;
3004  } else {
3005  return 0;
3006  }
3007 }
3008 
3009 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3010  * (-1) if not available */
3011 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3012 {
3013  int afc, len, flags;
3014  const uint8_t *p;
3015  unsigned int v;
3016 
3017  afc = (packet[3] >> 4) & 3;
3018  if (afc <= 1)
3019  return AVERROR_INVALIDDATA;
3020  p = packet + 4;
3021  len = p[0];
3022  p++;
3023  if (len == 0)
3024  return AVERROR_INVALIDDATA;
3025  flags = *p++;
3026  len--;
3027  if (!(flags & 0x10))
3028  return AVERROR_INVALIDDATA;
3029  if (len < 6)
3030  return AVERROR_INVALIDDATA;
3031  v = AV_RB32(p);
3032  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3033  *ppcr_low = ((p[4] & 1) << 8) | p[5];
3034  return 0;
3035 }
3036 
3037 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3038 
3039  /* NOTE: We attempt to seek on non-seekable files as well, as the
3040  * probe buffer usually is big enough. Only warn if the seek failed
3041  * on files where the seek should work. */
3042  if (avio_seek(pb, pos, SEEK_SET) < 0)
3043  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3044 }
3045 
3047 {
3048  MpegTSContext *ts = s->priv_data;
3049  AVIOContext *pb = s->pb;
3050  int64_t pos, probesize = s->probesize;
3051 
3053 
3054  if (ffio_ensure_seekback(pb, probesize) < 0)
3055  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3056 
3057  pos = avio_tell(pb);
3059  if (ts->raw_packet_size <= 0) {
3060  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3062  }
3063  ts->stream = s;
3064  ts->auto_guess = 0;
3065 
3066  if (s->iformat == &ff_mpegts_demuxer) {
3067  /* normal demux */
3068 
3069  /* first do a scan to get all the services */
3070  seek_back(s, pb, pos);
3071 
3075 
3076  handle_packets(ts, probesize / ts->raw_packet_size);
3077  /* if could not find service, enable auto_guess */
3078 
3079  ts->auto_guess = 1;
3080 
3081  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3082 
3084  } else {
3085  AVStream *st;
3086  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3087  int64_t pcrs[2], pcr_h;
3088  int packet_count[2];
3089  uint8_t packet[TS_PACKET_SIZE];
3090  const uint8_t *data;
3091 
3092  /* only read packets */
3093 
3094  st = avformat_new_stream(s, NULL);
3095  if (!st)
3096  return AVERROR(ENOMEM);
3097  avpriv_set_pts_info(st, 60, 1, 27000000);
3100 
3101  /* we iterate until we find two PCRs to estimate the bitrate */
3102  pcr_pid = -1;
3103  nb_pcrs = 0;
3104  nb_packets = 0;
3105  for (;;) {
3106  ret = read_packet(s, packet, ts->raw_packet_size, &data);
3107  if (ret < 0)
3108  return ret;
3109  pid = AV_RB16(data + 1) & 0x1fff;
3110  if ((pcr_pid == -1 || pcr_pid == pid) &&
3111  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3113  pcr_pid = pid;
3114  packet_count[nb_pcrs] = nb_packets;
3115  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3116  nb_pcrs++;
3117  if (nb_pcrs >= 2) {
3118  if (pcrs[1] - pcrs[0] > 0) {
3119  /* the difference needs to be positive to make sense for bitrate computation */
3120  break;
3121  } else {
3122  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3123  pcrs[0] = pcrs[1];
3124  packet_count[0] = packet_count[1];
3125  nb_pcrs--;
3126  }
3127  }
3128  } else {
3130  }
3131  nb_packets++;
3132  }
3133 
3134  /* NOTE1: the bitrate is computed without the FEC */
3135  /* NOTE2: it is only the bitrate of the start of the stream */
3136  ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3137  ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3138  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3139  st->codecpar->bit_rate = s->bit_rate;
3140  st->start_time = ts->cur_pcr;
3141  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3142  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3143  }
3144 
3145  seek_back(s, pb, pos);
3146  return 0;
3147 }
3148 
3149 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3150 
3152 {
3153  MpegTSContext *ts = s->priv_data;
3154  int ret, i;
3155  int64_t pcr_h, next_pcr_h, pos;
3156  int pcr_l, next_pcr_l;
3157  uint8_t pcr_buf[12];
3158  const uint8_t *data;
3159 
3160  if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3161  return ret;
3162  ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3163  pkt->pos = avio_tell(s->pb);
3164  if (ret < 0) {
3165  return ret;
3166  }
3167  if (data != pkt->data)
3168  memcpy(pkt->data, data, ts->raw_packet_size);
3170  if (ts->mpeg2ts_compute_pcr) {
3171  /* compute exact PCR for each packet */
3172  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3173  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3174  pos = avio_tell(s->pb);
3175  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3176  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3177  avio_read(s->pb, pcr_buf, 12);
3178  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3179  /* XXX: not precise enough */
3180  ts->pcr_incr =
3181  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3182  (i + 1);
3183  break;
3184  }
3185  }
3186  avio_seek(s->pb, pos, SEEK_SET);
3187  /* no next PCR found: we use previous increment */
3188  ts->cur_pcr = pcr_h * 300 + pcr_l;
3189  }
3190  pkt->pts = ts->cur_pcr;
3191  pkt->duration = ts->pcr_incr;
3192  ts->cur_pcr += ts->pcr_incr;
3193  }
3194  pkt->stream_index = 0;
3195  return 0;
3196 }
3197 
3199 {
3200  MpegTSContext *ts = s->priv_data;
3201  int ret, i;
3202 
3203  pkt->size = -1;
3204  ts->pkt = pkt;
3205  ret = handle_packets(ts, 0);
3206  if (ret < 0) {
3207  av_packet_unref(ts->pkt);
3208  /* flush pes data left */
3209  for (i = 0; i < NB_PID_MAX; i++)
3210  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3211  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3212  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3213  ret = new_pes_packet(pes, pkt);
3214  if (ret < 0)
3215  return ret;
3216  pes->state = MPEGTS_SKIP;
3217  ret = 0;
3218  break;
3219  }
3220  }
3221  }
3222 
3223  if (!ret && pkt->size < 0)
3224  ret = AVERROR_INVALIDDATA;
3225  return ret;
3226 }
3227 
3228 static void mpegts_free(MpegTSContext *ts)
3229 {
3230  int i;
3231 
3232  clear_programs(ts);
3233 
3234  for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3235  av_buffer_pool_uninit(&ts->pools[i]);
3236 
3237  for (i = 0; i < NB_PID_MAX; i++)
3238  if (ts->pids[i])
3239  mpegts_close_filter(ts, ts->pids[i]);
3240 }
3241 
3243 {
3244  MpegTSContext *ts = s->priv_data;
3245  mpegts_free(ts);
3246  return 0;
3247 }
3248 
3249 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3250  int64_t *ppos, int64_t pos_limit)
3251 {
3252  MpegTSContext *ts = s->priv_data;
3253  int64_t pos, timestamp;
3254  uint8_t buf[TS_PACKET_SIZE];
3255  int pcr_l, pcr_pid =
3256  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3257  int pos47 = ts->pos47_full % ts->raw_packet_size;
3258  pos =
3259  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3260  ts->raw_packet_size + pos47;
3261  while(pos < pos_limit) {
3262  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3263  return AV_NOPTS_VALUE;
3264  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3265  return AV_NOPTS_VALUE;
3266  if (buf[0] != 0x47) {
3267  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3268  return AV_NOPTS_VALUE;
3269  pos = avio_tell(s->pb);
3270  continue;
3271  }
3272  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3273  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3274  *ppos = pos;
3275  return timestamp;
3276  }
3277  pos += ts->raw_packet_size;
3278  }
3279 
3280  return AV_NOPTS_VALUE;
3281 }
3282 
3283 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3284  int64_t *ppos, int64_t pos_limit)
3285 {
3286  MpegTSContext *ts = s->priv_data;
3287  int64_t pos;
3288  int pos47 = ts->pos47_full % ts->raw_packet_size;
3289  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3291  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3292  return AV_NOPTS_VALUE;
3293  while(pos < pos_limit) {
3294  int ret;
3295  AVPacket pkt;
3296  av_init_packet(&pkt);
3297  ret = av_read_frame(s, &pkt);
3298  if (ret < 0)
3299  return AV_NOPTS_VALUE;
3300  if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3301  ff_reduce_index(s, pkt.stream_index);
3302  av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3303  if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3304  int64_t dts = pkt.dts;
3305  *ppos = pkt.pos;
3306  av_packet_unref(&pkt);
3307  return dts;
3308  }
3309  }
3310  pos = pkt.pos;
3311  av_packet_unref(&pkt);
3312  }
3313 
3314  return AV_NOPTS_VALUE;
3315 }
3316 
3317 /**************************************************************/
3318 /* parsing functions - called from other demuxers such as RTP */
3319 
3321 {
3322  MpegTSContext *ts;
3323 
3324  ts = av_mallocz(sizeof(MpegTSContext));
3325  if (!ts)
3326  return NULL;
3327  /* no stream case, currently used by RTP */
3329  ts->stream = s;
3330  ts->auto_guess = 1;
3331 
3335 
3336  return ts;
3337 }
3338 
3339 /* return the consumed length if a packet was output, or -1 if no
3340  * packet is output */
3342  const uint8_t *buf, int len)
3343 {
3344  int len1;
3345 
3346  len1 = len;
3347  ts->pkt = pkt;
3348  for (;;) {
3349  ts->stop_parse = 0;
3350  if (len < TS_PACKET_SIZE)
3351  return AVERROR_INVALIDDATA;
3352  if (buf[0] != 0x47) {
3353  buf++;
3354  len--;
3355  } else {
3356  handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3357  buf += TS_PACKET_SIZE;
3358  len -= TS_PACKET_SIZE;
3359  if (ts->stop_parse == 1)
3360  break;
3361  }
3362  }
3363  return len1 - len;
3364 }
3365 
3367 {
3368  mpegts_free(ts);
3369  av_free(ts);
3370 }
3371 
3372 AVInputFormat ff_mpegts_demuxer = {
3373  .name = "mpegts",
3374  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3375  .priv_data_size = sizeof(MpegTSContext),
3380  .read_timestamp = mpegts_get_dts,
3382  .priv_class = &mpegts_class,
3383 };
3384 
3386  .name = "mpegtsraw",
3387  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3388  .priv_data_size = sizeof(MpegTSContext),
3392  .read_timestamp = mpegts_get_dts,
3394  .priv_class = &mpegtsraw_class,
3395 };
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:3228
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:643
#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
if(ret< 0)
Definition: vf_mcdeint.c:279
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:2907
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:2045
#define PROBE_PACKET_MAX_BUF
Definition: mpegts.c:60
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:3149
enum AVMediaType codec_type
Definition: mpegts.c:783
int64_t dts
Definition: mpegts.c:252
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1490
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:4938
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:3320
#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:572
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:641
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:3372
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2613
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:752
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
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3198
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:2839
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:2882
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:1924
#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:1973
static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2559
Public dictionary API.
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:1033
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:3046
AVFormatContext * s
Definition: mpegts.c:1425
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:3283
#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:1504
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:1117
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:4519
int pmt_pid
Definition: avformat.h:1277
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1766
#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:1427
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:1457
#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:4618
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:1972
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:3037
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:1399
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:530
AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3385
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1435
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:554
enum AVCodecID codec_id
Definition: mpegts.c:784
#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:4227
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:827
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1432
static const StreamType HDMV_types[]
Definition: mpegts.c:811
#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:3242
unsigned int check_crc
Definition: mpegts.c:90
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3151
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const uint8_t * code
Definition: spdifenc.c:411
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1363
int avcodec_is_open(AVCodecContext *s)
Definition: utils.c:1917
const char * r
Definition: vf_curves.c:114
unsigned int pos
Definition: spdifenc.c:410
#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:239
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:1525
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 pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:138
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:208
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:5022
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:3321
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:839
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:833
#define EIT_PID
Definition: mpegts.h:45
uint16_t id
Definition: mpegts.c:640
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:5515
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:1650
#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:2232
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:1860
#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:2968
#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:888
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:940
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1762
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:1581
#define CHECK_COUNT
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1539
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:2200
MpegTSSectionFilter section_filter
Definition: mpegts.c:105
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1758
#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:1026
uint8_t sec_num
Definition: mpegts.c:642
static int get_packet_size(AVFormatContext *s)
Definition: mpegts.c:601
int extended_stream_id
Definition: mpegts.c:250
preferred ID for MPEG-1/2 video decoding
Definition: 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:787
#define av_log2
Definition: intmath.h:83
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
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:3249
#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:855
int use_au_end
Definition: mpegts.h:149
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1467
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:986
int resync_size
Definition: mpegts.c:154
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:657
#define MAX_LEVEL
Definition: mpegts.c:1423
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:3011
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:276
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2274
#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:3341
#define mid_pred
Definition: mathops.h:97
AVMediaType
Definition: avutil.h:199
refcounted data buffer API
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:551
static const StreamType DESC_types[]
Definition: mpegts.c:862
#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:1773
int dec_config_descr_len
Definition: mpegts.h:166
uint8_t * section_buf
Definition: mpegts.c:89
uint8_t tid
Definition: mpegts.c:639
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:564
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:1777
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:2484
static AVBufferRef * buffer_pool_get(MpegTSContext *ts, int size)
Definition: mpegts.c:1104
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:2701
int use_rand_acc_pt
Definition: mpegts.h:150
int data_index
Definition: mpegts.c:246
AVBufferPool * av_buffer_pool_init(int size, AVBufferRef *(*alloc)(int size))
Allocate and initialize a buffer pool.
Definition: buffer.c:239
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:1971
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:970
#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:2268
#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:646
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h: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:670
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:667
#define av_free(p)
Mp4Descr * active_descr
Definition: mpegts.c:1428
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:337
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:546
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1729
int degr_prior_len
Definition: mpegts.h:159
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1478
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:1666
AVIOContext pb
Definition: mpegts.c:1426
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:871
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:3366
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:782
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:685
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: 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:979
#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:2915
#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:1634