FFmpeg
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/common.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/internal.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/log.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/dovi_meta.h"
33 #include "libavcodec/bytestream.h"
34 #include "libavcodec/get_bits.h"
35 #include "libavcodec/opus.h"
36 #include "avformat.h"
37 #include "mpegts.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "mpeg.h"
41 #include "isom.h"
42 #if CONFIG_ICONV
43 #include <iconv.h>
44 #endif
45 
46 /* maximum size in which we look for synchronization if
47  * synchronization is lost */
48 #define MAX_RESYNC_SIZE 65536
49 
50 #define MAX_PES_PAYLOAD 200 * 1024
51 
52 #define MAX_MP4_DESCR_COUNT 16
53 
54 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
55  do { \
56  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
57  (modulus) = (dividend) % (divisor); \
58  (prev_dividend) = (dividend); \
59  } while (0)
60 
61 #define PROBE_PACKET_MAX_BUF 8192
62 #define PROBE_PACKET_MARGIN 5
63 
68 };
69 
70 typedef struct MpegTSFilter MpegTSFilter;
71 
72 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
73  int is_start, int64_t pos);
74 
75 typedef struct MpegTSPESFilter {
77  void *opaque;
79 
80 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
81 
82 typedef void SetServiceCallback (void *opaque, int ret);
83 
84 typedef struct MpegTSSectionFilter {
87  int last_ver;
88  unsigned crc;
89  unsigned last_crc;
90  uint8_t *section_buf;
91  unsigned int check_crc : 1;
92  unsigned int end_of_section_reached : 1;
94  void *opaque;
96 
97 struct MpegTSFilter {
98  int pid;
99  int es_id;
100  int last_cc; /* last cc code (-1 if first packet) */
101  int64_t last_pcr;
102  int discard;
104  union {
107  } u;
108 };
109 
110 struct Stream {
111  int idx;
113 };
114 
115 #define MAX_STREAMS_PER_PROGRAM 128
116 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
117 struct Program {
118  unsigned int id; // program id/service id
119  unsigned int nb_pids;
120  unsigned int pids[MAX_PIDS_PER_PROGRAM];
121  unsigned int nb_streams;
123 
124  /** have we found pmt for this program */
126 };
127 
129  const AVClass *class;
130  /* user data */
132  /** raw packet size, including FEC if present */
134 
135  int64_t pos47_full;
136 
137  /** if true, all pids are analyzed to find streams */
139 
140  /** compute exact PCR for each transport stream packet */
142 
143  /** fix dvb teletext pts */
145 
146  int64_t cur_pcr; /**< used to estimate the exact PCR */
147  int64_t pcr_incr; /**< used to estimate the exact PCR */
148 
149  /* data needed to handle file based ts */
150  /** stop parsing loop */
152  /** packet containing Audio/Video data */
154  /** to detect seek */
155  int64_t last_pos;
156 
160 
162 
165 
166  /******************************************/
167  /* private mpegts data */
168  /* scan context */
169  /** structure to keep track of Program->pids mapping */
170  unsigned int nb_prg;
171  struct Program *prg;
172 
174  /** filters for various streams specified by PMT + for the PAT and PMT */
177 
180 };
181 
182 #define MPEGTS_OPTIONS \
183  { "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 }
184 
185 static const AVOption options[] = {
187  {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
188  {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
189  {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
191  {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
192  {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
193  {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
194  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
195  {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
196  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
197  {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
198  {.i64 = 0}, 0, 1, 0 },
199  {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
200  {.i64 = 0}, 0, 1, 0 },
201  { NULL },
202 };
203 
204 static const AVClass mpegts_class = {
205  .class_name = "mpegts demuxer",
206  .item_name = av_default_item_name,
207  .option = options,
208  .version = LIBAVUTIL_VERSION_INT,
209 };
210 
211 static const AVOption raw_options[] = {
213  { "compute_pcr", "compute exact PCR for each transport stream packet",
214  offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
215  { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
216  { "ts_packetsize", "output option carrying the raw packet size",
217  offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
218  { .i64 = 0 }, 0, 0,
220  { NULL },
221 };
222 
223 static const AVClass mpegtsraw_class = {
224  .class_name = "mpegtsraw demuxer",
225  .item_name = av_default_item_name,
226  .option = raw_options,
227  .version = LIBAVUTIL_VERSION_INT,
228 };
229 
230 /* TS stream handling */
231 
238 };
239 
240 /* enough for PES header + length */
241 #define PES_START_SIZE 6
242 #define PES_HEADER_SIZE 9
243 #define MAX_PES_HEADER_SIZE (9 + 255)
244 
245 typedef struct PESContext {
246  int pid;
247  int pcr_pid; /**< if -1 then all packets containing PCR are considered */
252  AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
254  /* used to get the format */
256  int flags; /**< copied to the AVPacket flags */
260  uint8_t stream_id;
261  int64_t pts, dts;
262  int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
267 } PESContext;
268 
269 extern const AVInputFormat ff_mpegts_demuxer;
270 
271 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
272 {
273  int i;
274  for (i = 0; i < ts->nb_prg; i++) {
275  if (ts->prg[i].id == programid) {
276  return &ts->prg[i];
277  }
278  }
279  return NULL;
280 }
281 
282 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
283 {
284  AVProgram *prg = NULL;
285  int i;
286 
287  for (i = 0; i < ts->stream->nb_programs; i++)
288  if (ts->stream->programs[i]->id == programid) {
289  prg = ts->stream->programs[i];
290  break;
291  }
292  if (!prg)
293  return;
294  prg->nb_stream_indexes = 0;
295 }
296 
297 static void clear_program(struct Program *p)
298 {
299  if (!p)
300  return;
301  p->nb_pids = 0;
302  p->nb_streams = 0;
303  p->pmt_found = 0;
304 }
305 
307 {
308  av_freep(&ts->prg);
309  ts->nb_prg = 0;
310 }
311 
312 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
313 {
314  struct Program *p = get_program(ts, programid);
315  if (p)
316  return p;
317  if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
318  ts->nb_prg = 0;
319  return NULL;
320  }
321  p = &ts->prg[ts->nb_prg];
322  p->id = programid;
323  clear_program(p);
324  ts->nb_prg++;
325  return p;
326 }
327 
328 static void add_pid_to_program(struct Program *p, unsigned int pid)
329 {
330  int i;
331  if (!p)
332  return;
333 
334  if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
335  return;
336 
337  for (i = 0; i < p->nb_pids; i++)
338  if (p->pids[i] == pid)
339  return;
340 
341  p->pids[p->nb_pids++] = pid;
342 }
343 
344 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
345  unsigned int pid, int version)
346 {
347  int i;
348  for (i = 0; i < s->nb_programs; i++) {
349  AVProgram *program = s->programs[i];
350  if (program->id == programid) {
351  int old_pcr_pid = program->pcr_pid,
352  old_version = program->pmt_version;
353  program->pcr_pid = pid;
354  program->pmt_version = version;
355 
356  if (old_version != -1 && old_version != version) {
358  "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
359  programid, old_version, version, old_pcr_pid, pid);
360  }
361  break;
362  }
363  }
364 }
365 
366 /**
367  * @brief discard_pid() decides if the pid is to be discarded according
368  * to caller's programs selection
369  * @param ts : - TS context
370  * @param pid : - pid
371  * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
372  * 0 otherwise
373  */
374 static int discard_pid(MpegTSContext *ts, unsigned int pid)
375 {
376  int i, j, k;
377  int used = 0, discarded = 0;
378  struct Program *p;
379 
380  if (pid == PAT_PID)
381  return 0;
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;
431  if (buf_size < len)
432  len = buf_size;
433  memcpy(tss->section_buf + tss->section_index, buf, len);
434  tss->section_index += len;
435  }
436 
437  offset = 0;
438  cur_section_buf = tss->section_buf;
439  while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
440  /* compute section length if possible */
441  if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
442  len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
443  if (len > MAX_SECTION_SIZE)
444  return;
445  tss->section_h_size = len;
446  }
447 
448  if (tss->section_h_size != -1 &&
449  tss->section_index >= offset + tss->section_h_size) {
450  int crc_valid = 1;
451  tss->end_of_section_reached = 1;
452 
453  if (tss->check_crc) {
454  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
455  if (tss->section_h_size >= 4)
456  tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
457 
458  if (crc_valid) {
459  ts->crc_validity[ tss1->pid ] = 100;
460  }else if (ts->crc_validity[ tss1->pid ] > -10) {
461  ts->crc_validity[ tss1->pid ]--;
462  }else
463  crc_valid = 2;
464  }
465  if (crc_valid) {
466  tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
467  if (crc_valid != 1)
468  tss->last_ver = -1;
469  }
470 
471  cur_section_buf += tss->section_h_size;
472  offset += tss->section_h_size;
473  tss->section_h_size = -1;
474  } else {
475  tss->section_h_size = -1;
476  tss->end_of_section_reached = 0;
477  break;
478  }
479  }
480 }
481 
482 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
483  enum MpegTSFilterType type)
484 {
486 
487  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
488 
489  if (pid >= NB_PID_MAX || ts->pids[pid])
490  return NULL;
491  filter = av_mallocz(sizeof(MpegTSFilter));
492  if (!filter)
493  return NULL;
494  ts->pids[pid] = filter;
495 
496  filter->type = type;
497  filter->pid = pid;
498  filter->es_id = -1;
499  filter->last_cc = -1;
500  filter->last_pcr= -1;
501 
502  return filter;
503 }
504 
506  unsigned int pid,
507  SectionCallback *section_cb,
508  void *opaque,
509  int check_crc)
510 {
512  MpegTSSectionFilter *sec;
513  uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
514 
515  if (!section_buf)
516  return NULL;
517 
518  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
519  av_free(section_buf);
520  return NULL;
521  }
522  sec = &filter->u.section_filter;
523  sec->section_cb = section_cb;
524  sec->opaque = opaque;
525  sec->section_buf = section_buf;
526  sec->check_crc = check_crc;
527  sec->last_ver = -1;
528 
529  return filter;
530 }
531 
532 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
533  PESCallback *pes_cb,
534  void *opaque)
535 {
537  MpegTSPESFilter *pes;
538 
539  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
540  return NULL;
541 
542  pes = &filter->u.pes_filter;
543  pes->pes_cb = pes_cb;
544  pes->opaque = opaque;
545  return filter;
546 }
547 
548 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
549 {
550  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
551 }
552 
554 {
555  int pid;
556 
557  pid = filter->pid;
558  if (filter->type == MPEGTS_SECTION)
559  av_freep(&filter->u.section_filter.section_buf);
560  else if (filter->type == MPEGTS_PES) {
561  PESContext *pes = filter->u.pes_filter.opaque;
562  av_buffer_unref(&pes->buffer);
563  /* referenced private data will be freed later in
564  * avformat_close_input (pes->st->priv_data == pes) */
565  if (!pes->st || pes->merged_st) {
566  av_freep(&filter->u.pes_filter.opaque);
567  }
568  }
569 
570  av_free(filter);
571  ts->pids[pid] = NULL;
572 }
573 
574 static int analyze(const uint8_t *buf, int size, int packet_size,
575  int probe)
576 {
577  int stat[TS_MAX_PACKET_SIZE];
578  int stat_all = 0;
579  int i;
580  int best_score = 0;
581 
582  memset(stat, 0, packet_size * sizeof(*stat));
583 
584  for (i = 0; i < size - 3; i++) {
585  if (buf[i] == 0x47) {
586  int pid = AV_RB16(buf+1) & 0x1FFF;
587  int asc = buf[i + 3] & 0x30;
588  if (!probe || pid == 0x1FFF || asc) {
589  int x = i % packet_size;
590  stat[x]++;
591  stat_all++;
592  if (stat[x] > best_score) {
593  best_score = stat[x];
594  }
595  }
596  }
597  }
598 
599  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
600 }
601 
602 /* autodetect fec presence */
604 {
605  int score, fec_score, dvhs_score;
606  int margin;
607  int ret;
608 
609  /*init buffer to store stream for probing */
610  uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
611  int buf_size = 0;
612  int max_iterations = 16;
613 
614  while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
615  ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
616  if (ret < 0)
617  return AVERROR_INVALIDDATA;
618  buf_size += ret;
619 
620  score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
621  dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
622  fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
623  av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
624  buf_size, score, dvhs_score, fec_score);
625 
626  margin = mid_pred(score, fec_score, dvhs_score);
627 
628  if (buf_size < PROBE_PACKET_MAX_BUF)
629  margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
630 
631  if (score > margin)
632  return TS_PACKET_SIZE;
633  else if (dvhs_score > margin)
634  return TS_DVHS_PACKET_SIZE;
635  else if (fec_score > margin)
636  return TS_FEC_PACKET_SIZE;
637  }
638  return AVERROR_INVALIDDATA;
639 }
640 
641 typedef struct SectionHeader {
642  uint8_t tid;
643  uint16_t id;
644  uint8_t version;
645  uint8_t sec_num;
646  uint8_t last_sec_num;
647 } SectionHeader;
648 
650 {
651  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
652  return 1;
653 
654  tssf->last_ver = h->version;
655  tssf->last_crc = tssf->crc;
656 
657  return 0;
658 }
659 
660 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
661 {
662  const uint8_t *p;
663  int c;
664 
665  p = *pp;
666  if (p >= p_end)
667  return AVERROR_INVALIDDATA;
668  c = *p++;
669  *pp = p;
670  return c;
671 }
672 
673 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
674 {
675  const uint8_t *p;
676  int c;
677 
678  p = *pp;
679  if (1 >= p_end - p)
680  return AVERROR_INVALIDDATA;
681  c = AV_RB16(p);
682  p += 2;
683  *pp = p;
684  return c;
685 }
686 
687 /* read and allocate a DVB string preceded by its length */
688 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
689 {
690  int len;
691  const uint8_t *p;
692  char *str;
693 
694  p = *pp;
695  len = get8(&p, p_end);
696  if (len < 0)
697  return NULL;
698  if (len > p_end - p)
699  return NULL;
700 #if CONFIG_ICONV
701  if (len) {
702  const char *encodings[] = {
703  "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
704  "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
705  "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
706  "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
707  "", "", "", "", "", "", "", ""
708  };
709  iconv_t cd;
710  char *in, *out;
711  size_t inlen = len, outlen = inlen * 6 + 1;
712  if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
713  char iso8859[12];
714  snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
715  inlen -= 3;
716  in = (char *)p + 3;
717  cd = iconv_open("UTF-8", iso8859);
718  } else if (p[0] < 0x20) {
719  inlen -= 1;
720  in = (char *)p + 1;
721  cd = iconv_open("UTF-8", encodings[*p]);
722  } else {
723  in = (char *)p;
724  cd = iconv_open("UTF-8", encodings[0]);
725  }
726  if (cd == (iconv_t)-1)
727  goto no_iconv;
728  str = out = av_malloc(outlen);
729  if (!str) {
730  iconv_close(cd);
731  return NULL;
732  }
733  if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
734  iconv_close(cd);
735  av_freep(&str);
736  goto no_iconv;
737  }
738  iconv_close(cd);
739  *out = 0;
740  *pp = p + len;
741  return str;
742  }
743 no_iconv:
744 #endif
745  str = av_malloc(len + 1);
746  if (!str)
747  return NULL;
748  memcpy(str, p, len);
749  str[len] = '\0';
750  p += len;
751  *pp = p;
752  return str;
753 }
754 
756  const uint8_t **pp, const uint8_t *p_end)
757 {
758  int val;
759 
760  val = get8(pp, p_end);
761  if (val < 0)
762  return val;
763  h->tid = val;
764  *pp += 2;
765  val = get16(pp, p_end);
766  if (val < 0)
767  return val;
768  h->id = val;
769  val = get8(pp, p_end);
770  if (val < 0)
771  return val;
772  h->version = (val >> 1) & 0x1f;
773  val = get8(pp, p_end);
774  if (val < 0)
775  return val;
776  h->sec_num = val;
777  val = get8(pp, p_end);
778  if (val < 0)
779  return val;
780  h->last_sec_num = val;
781  return 0;
782 }
783 
784 typedef struct StreamType {
785  uint32_t stream_type;
788 } StreamType;
789 
790 static const StreamType ISO_types[] = {
797  /* Makito encoder sets stream type 0x11 for AAC,
798  * so auto-detect LOAS/LATM instead of hardcoding it. */
799 #if !CONFIG_LOAS_DEMUXER
800  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
801 #endif
812  { 0 },
813 };
814 
815 static const StreamType HDMV_types[] = {
821  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
822  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
823  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
824  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
827  { 0 },
828 };
829 
830 /* SCTE types */
831 static const StreamType SCTE_types[] = {
833  { 0 },
834 };
835 
836 /* ATSC ? */
837 static const StreamType MISC_types[] = {
840  { 0 },
841 };
842 
843 /* HLS Sample Encryption Types */
849  { 0 },
850 };
851 
852 static const StreamType REGD_types[] = {
853  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
854  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
855  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
856  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
857  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
858  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
859  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
860  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
861  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
862  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
863  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
864  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
865  { 0 },
866 };
867 
868 static const StreamType METADATA_types[] = {
869  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
870  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
871  { 0 },
872 };
873 
874 /* descriptor present */
875 static const StreamType DESC_types[] = {
876  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
877  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
880  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
881  { 0 },
882 };
883 
885  uint32_t stream_type,
886  const StreamType *types)
887 {
888  FFStream *const sti = ffstream(st);
889  for (; types->stream_type; types++)
890  if (stream_type == types->stream_type) {
891  if (st->codecpar->codec_type != types->codec_type ||
892  st->codecpar->codec_id != types->codec_id) {
893  st->codecpar->codec_type = types->codec_type;
894  st->codecpar->codec_id = types->codec_id;
895  sti->need_context_update = 1;
896  }
897  sti->request_probe = 0;
898  return;
899  }
900 }
901 
903  uint32_t stream_type, uint32_t prog_reg_desc)
904 {
905  FFStream *const sti = ffstream(st);
906  int old_codec_type = st->codecpar->codec_type;
907  int old_codec_id = st->codecpar->codec_id;
908  int old_codec_tag = st->codecpar->codec_tag;
909 
910  if (avcodec_is_open(sti->avctx)) {
911  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
912  return 0;
913  }
914 
915  avpriv_set_pts_info(st, 33, 1, 90000);
916  st->priv_data = pes;
920  pes->st = st;
921  pes->stream_type = stream_type;
922 
923  av_log(pes->stream, AV_LOG_DEBUG,
924  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
925  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
926 
927  st->codecpar->codec_tag = pes->stream_type;
928 
930  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
931  sti->request_probe = 50;
932  if ((prog_reg_desc == AV_RL32("HDMV") ||
933  prog_reg_desc == AV_RL32("HDPR")) &&
936  if (pes->stream_type == 0x83) {
937  // HDMV TrueHD streams also contain an AC3 coded version of the
938  // audio track - add a second stream for this
939  AVStream *sub_st;
940  // priv_data cannot be shared between streams
941  PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
942  if (!sub_pes)
943  return AVERROR(ENOMEM);
944  memcpy(sub_pes, pes, sizeof(*sub_pes));
945 
946  sub_st = avformat_new_stream(pes->stream, NULL);
947  if (!sub_st) {
948  av_free(sub_pes);
949  return AVERROR(ENOMEM);
950  }
951 
952  sub_st->id = pes->pid;
953  avpriv_set_pts_info(sub_st, 33, 1, 90000);
954  sub_st->priv_data = sub_pes;
956  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
958  sub_pes->sub_st = pes->sub_st = sub_st;
959  }
960  }
961  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
963  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
965  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
966  st->codecpar->codec_id = old_codec_id;
967  st->codecpar->codec_type = old_codec_type;
968  }
969  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
970  (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
971  sti->probe_packets > 0 &&
972  stream_type == STREAM_TYPE_PRIVATE_DATA) {
976  }
977 
978  /* queue a context update if properties changed */
979  if (old_codec_type != st->codecpar->codec_type ||
980  old_codec_id != st->codecpar->codec_id ||
981  old_codec_tag != st->codecpar->codec_tag)
982  sti->need_context_update = 1;
983 
984  return 0;
985 }
986 
988 {
989  pes->pts = AV_NOPTS_VALUE;
990  pes->dts = AV_NOPTS_VALUE;
991  pes->data_index = 0;
992  pes->flags = 0;
993  av_buffer_unref(&pes->buffer);
994 }
995 
996 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
997 {
999  pkt->data = (uint8_t *)buffer;
1000  pkt->size = len;
1001 }
1002 
1004 {
1005  uint8_t *sd;
1006 
1008 
1009  pkt->buf = pes->buffer;
1010  pkt->data = pes->buffer->data;
1011  pkt->size = pes->data_index;
1012 
1013  if (pes->PES_packet_length &&
1014  pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1015  PES_START_SIZE) {
1016  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1017  pes->flags |= AV_PKT_FLAG_CORRUPT;
1018  }
1019  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1020 
1021  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1022  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1023  pkt->stream_index = pes->sub_st->index;
1024  else
1025  pkt->stream_index = pes->st->index;
1026  pkt->pts = pes->pts;
1027  pkt->dts = pes->dts;
1028  /* store position of first TS packet of this PES packet */
1029  pkt->pos = pes->ts_packet_pos;
1030  pkt->flags = pes->flags;
1031 
1032  pes->buffer = NULL;
1034 
1036  if (!sd)
1037  return AVERROR(ENOMEM);
1038  *sd = pes->stream_id;
1039 
1040  return 0;
1041 }
1042 
1043 static uint64_t get_ts64(GetBitContext *gb, int bits)
1044 {
1045  if (get_bits_left(gb) < bits)
1046  return AV_NOPTS_VALUE;
1047  return get_bits64(gb, bits);
1048 }
1049 
1051  const uint8_t *buf, int buf_size)
1052 {
1053  GetBitContext gb;
1054  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1055  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1056  int dts_flag = -1, cts_flag = -1;
1057  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1058  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1059  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1060 
1061  memcpy(buf_padded, buf, buf_padded_size);
1062 
1063  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1064 
1065  if (sl->use_au_start)
1066  au_start_flag = get_bits1(&gb);
1067  if (sl->use_au_end)
1068  au_end_flag = get_bits1(&gb);
1069  if (!sl->use_au_start && !sl->use_au_end)
1070  au_start_flag = au_end_flag = 1;
1071  if (sl->ocr_len > 0)
1072  ocr_flag = get_bits1(&gb);
1073  if (sl->use_idle)
1074  idle_flag = get_bits1(&gb);
1075  if (sl->use_padding)
1076  padding_flag = get_bits1(&gb);
1077  if (padding_flag)
1078  padding_bits = get_bits(&gb, 3);
1079 
1080  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1081  if (sl->packet_seq_num_len)
1083  if (sl->degr_prior_len)
1084  if (get_bits1(&gb))
1085  skip_bits(&gb, sl->degr_prior_len);
1086  if (ocr_flag)
1087  skip_bits_long(&gb, sl->ocr_len);
1088  if (au_start_flag) {
1089  if (sl->use_rand_acc_pt)
1090  get_bits1(&gb);
1091  if (sl->au_seq_num_len > 0)
1092  skip_bits_long(&gb, sl->au_seq_num_len);
1093  if (sl->use_timestamps) {
1094  dts_flag = get_bits1(&gb);
1095  cts_flag = get_bits1(&gb);
1096  }
1097  }
1098  if (sl->inst_bitrate_len)
1099  inst_bitrate_flag = get_bits1(&gb);
1100  if (dts_flag == 1)
1101  dts = get_ts64(&gb, sl->timestamp_len);
1102  if (cts_flag == 1)
1103  cts = get_ts64(&gb, sl->timestamp_len);
1104  if (sl->au_len > 0)
1105  skip_bits_long(&gb, sl->au_len);
1106  if (inst_bitrate_flag)
1107  skip_bits_long(&gb, sl->inst_bitrate_len);
1108  }
1109 
1110  if (dts != AV_NOPTS_VALUE)
1111  pes->dts = dts;
1112  if (cts != AV_NOPTS_VALUE)
1113  pes->pts = cts;
1114 
1115  if (sl->timestamp_len && sl->timestamp_res)
1117 
1118  return (get_bits_count(&gb) + 7) >> 3;
1119 }
1120 
1122 {
1124  if (!ts->pools[index]) {
1125  int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1126  ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1127  if (!ts->pools[index])
1128  return NULL;
1129  }
1130  return av_buffer_pool_get(ts->pools[index]);
1131 }
1132 
1133 /* return non zero if a packet could be constructed */
1135  const uint8_t *buf, int buf_size, int is_start,
1136  int64_t pos)
1137 {
1138  PESContext *pes = filter->u.pes_filter.opaque;
1139  MpegTSContext *ts = pes->ts;
1140  const uint8_t *p;
1141  int ret, len;
1142 
1143  if (!ts->pkt)
1144  return 0;
1145 
1146  if (is_start) {
1147  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1148  ret = new_pes_packet(pes, ts->pkt);
1149  if (ret < 0)
1150  return ret;
1151  ts->stop_parse = 1;
1152  } else {
1154  }
1155  pes->state = MPEGTS_HEADER;
1156  pes->ts_packet_pos = pos;
1157  }
1158  p = buf;
1159  while (buf_size > 0) {
1160  switch (pes->state) {
1161  case MPEGTS_HEADER:
1162  len = PES_START_SIZE - pes->data_index;
1163  if (len > buf_size)
1164  len = buf_size;
1165  memcpy(pes->header + pes->data_index, p, len);
1166  pes->data_index += len;
1167  p += len;
1168  buf_size -= len;
1169  if (pes->data_index == PES_START_SIZE) {
1170  /* we got all the PES or section header. We can now
1171  * decide */
1172  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1173  pes->header[2] == 0x01) {
1174  /* it must be an MPEG-2 PES stream */
1175  pes->stream_id = pes->header[3];
1176  av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1177 
1178  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1179  (!pes->sub_st ||
1180  pes->sub_st->discard == AVDISCARD_ALL)) ||
1182  goto skip;
1183 
1184  /* stream not present in PMT */
1185  if (!pes->st) {
1186  if (ts->skip_changes)
1187  goto skip;
1188  if (ts->merge_pmt_versions)
1189  goto skip; /* wait for PMT to merge new stream */
1190 
1191  pes->st = avformat_new_stream(ts->stream, NULL);
1192  if (!pes->st)
1193  return AVERROR(ENOMEM);
1194  pes->st->id = pes->pid;
1195  mpegts_set_stream_info(pes->st, pes, 0, 0);
1196  }
1197 
1198  pes->PES_packet_length = AV_RB16(pes->header + 4);
1199  /* NOTE: zero length means the PES size is unbounded */
1200 
1203  pes->stream_id != STREAM_ID_ECM_STREAM &&
1204  pes->stream_id != STREAM_ID_EMM_STREAM &&
1208  FFStream *const pes_sti = ffstream(pes->st);
1209  pes->state = MPEGTS_PESHEADER;
1210  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1211  av_log(pes->stream, AV_LOG_TRACE,
1212  "pid=%x stream_type=%x probing\n",
1213  pes->pid,
1214  pes->stream_type);
1215  pes_sti->request_probe = 1;
1216  }
1217  } else {
1218  pes->pes_header_size = 6;
1219  pes->state = MPEGTS_PAYLOAD;
1220  pes->data_index = 0;
1221  }
1222  } else {
1223  /* otherwise, it should be a table */
1224  /* skip packet */
1225 skip:
1226  pes->state = MPEGTS_SKIP;
1227  continue;
1228  }
1229  }
1230  break;
1231  /**********************************************/
1232  /* PES packing parsing */
1233  case MPEGTS_PESHEADER:
1234  len = PES_HEADER_SIZE - pes->data_index;
1235  if (len < 0)
1236  return AVERROR_INVALIDDATA;
1237  if (len > buf_size)
1238  len = buf_size;
1239  memcpy(pes->header + pes->data_index, p, len);
1240  pes->data_index += len;
1241  p += len;
1242  buf_size -= len;
1243  if (pes->data_index == PES_HEADER_SIZE) {
1244  pes->pes_header_size = pes->header[8] + 9;
1246  }
1247  break;
1248  case MPEGTS_PESHEADER_FILL:
1249  len = pes->pes_header_size - pes->data_index;
1250  if (len < 0)
1251  return AVERROR_INVALIDDATA;
1252  if (len > buf_size)
1253  len = buf_size;
1254  memcpy(pes->header + pes->data_index, p, len);
1255  pes->data_index += len;
1256  p += len;
1257  buf_size -= len;
1258  if (pes->data_index == pes->pes_header_size) {
1259  const uint8_t *r;
1260  unsigned int flags, pes_ext, skip;
1261 
1262  flags = pes->header[7];
1263  r = pes->header + 9;
1264  pes->pts = AV_NOPTS_VALUE;
1265  pes->dts = AV_NOPTS_VALUE;
1266  if ((flags & 0xc0) == 0x80) {
1267  pes->dts = pes->pts = ff_parse_pes_pts(r);
1268  r += 5;
1269  } else if ((flags & 0xc0) == 0xc0) {
1270  pes->pts = ff_parse_pes_pts(r);
1271  r += 5;
1272  pes->dts = ff_parse_pes_pts(r);
1273  r += 5;
1274  }
1275  pes->extended_stream_id = -1;
1276  if (flags & 0x01) { /* PES extension */
1277  pes_ext = *r++;
1278  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1279  skip = (pes_ext >> 4) & 0xb;
1280  skip += skip & 0x9;
1281  r += skip;
1282  if ((pes_ext & 0x41) == 0x01 &&
1283  (r + 2) <= (pes->header + pes->pes_header_size)) {
1284  /* PES extension 2 */
1285  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1286  pes->extended_stream_id = r[1];
1287  }
1288  }
1289 
1290  /* we got the full header. We parse it and get the payload */
1291  pes->state = MPEGTS_PAYLOAD;
1292  pes->data_index = 0;
1293  if (pes->stream_type == 0x12 && buf_size > 0) {
1294  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1295  buf_size);
1296  pes->pes_header_size += sl_header_bytes;
1297  p += sl_header_bytes;
1298  buf_size -= sl_header_bytes;
1299  }
1300  if (pes->stream_type == 0x15 && buf_size >= 5) {
1301  /* skip metadata access unit header */
1302  pes->pes_header_size += 5;
1303  p += 5;
1304  buf_size -= 5;
1305  }
1306  if ( pes->ts->fix_teletext_pts
1309  ) {
1310  AVProgram *p = NULL;
1311  int pcr_found = 0;
1312  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1313  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1314  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1315  if (f) {
1316  AVStream *st = NULL;
1317  if (f->type == MPEGTS_PES) {
1318  PESContext *pcrpes = f->u.pes_filter.opaque;
1319  if (pcrpes)
1320  st = pcrpes->st;
1321  } else if (f->type == MPEGTS_PCR) {
1322  int i;
1323  for (i = 0; i < p->nb_stream_indexes; i++) {
1324  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1325  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1326  st = pst;
1327  }
1328  }
1329  if (f->last_pcr != -1 && !f->discard) {
1330  // teletext packets do not always have correct timestamps,
1331  // the standard says they should be handled after 40.6 ms at most,
1332  // and the pcr error to this packet should be no more than 100 ms.
1333  // TODO: we should interpolate the PCR, not just use the last one
1334  int64_t pcr = f->last_pcr / 300;
1335  pcr_found = 1;
1336  if (st) {
1337  const FFStream *const sti = ffstream(st);
1338  FFStream *const pes_sti = ffstream(pes->st);
1339 
1340  pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1341  pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1342  }
1343  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1344  pes->pts = pes->dts = pcr;
1345  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1346  pes->dts > pcr + 3654 + 9000) {
1347  pes->pts = pes->dts = pcr + 3654 + 9000;
1348  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1349  pes->dts > pcr + 10*90000) { //10sec
1350  pes->pts = pes->dts = pcr + 3654 + 9000;
1351  }
1352  break;
1353  }
1354  }
1355  }
1356  }
1357 
1358  if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1359  !pcr_found) {
1361  "Forcing DTS/PTS to be unset for a "
1362  "non-trustworthy PES packet for PID %d as "
1363  "PCR hasn't been received yet.\n",
1364  pes->pid);
1365  pes->dts = pes->pts = AV_NOPTS_VALUE;
1366  }
1367  }
1368  }
1369  break;
1370  case MPEGTS_PAYLOAD:
1371  do {
1372  int max_packet_size = MAX_PES_PAYLOAD;
1374  max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1375 
1376  if (pes->data_index > 0 &&
1377  pes->data_index + buf_size > max_packet_size) {
1378  ret = new_pes_packet(pes, ts->pkt);
1379  if (ret < 0)
1380  return ret;
1381  pes->PES_packet_length = 0;
1382  max_packet_size = MAX_PES_PAYLOAD;
1383  ts->stop_parse = 1;
1384  } else if (pes->data_index == 0 &&
1385  buf_size > max_packet_size) {
1386  // pes packet size is < ts size packet and pes data is padded with 0xff
1387  // not sure if this is legal in ts but see issue #2392
1388  buf_size = max_packet_size;
1389  }
1390 
1391  if (!pes->buffer) {
1392  pes->buffer = buffer_pool_get(ts, max_packet_size);
1393  if (!pes->buffer)
1394  return AVERROR(ENOMEM);
1395  }
1396 
1397  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1398  pes->data_index += buf_size;
1399  /* emit complete packets with known packet size
1400  * decreases demuxer delay for infrequent packets like subtitles from
1401  * a couple of seconds to milliseconds for properly muxed files. */
1402  if (!ts->stop_parse && pes->PES_packet_length &&
1404  ts->stop_parse = 1;
1405  ret = new_pes_packet(pes, ts->pkt);
1406  pes->state = MPEGTS_SKIP;
1407  if (ret < 0)
1408  return ret;
1409  }
1410  } while (0);
1411  buf_size = 0;
1412  break;
1413  case MPEGTS_SKIP:
1414  buf_size = 0;
1415  break;
1416  }
1417  }
1418 
1419  return 0;
1420 }
1421 
1422 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1423 {
1424  MpegTSFilter *tss;
1425  PESContext *pes;
1426 
1427  /* if no pid found, then add a pid context */
1428  pes = av_mallocz(sizeof(PESContext));
1429  if (!pes)
1430  return 0;
1431  pes->ts = ts;
1432  pes->stream = ts->stream;
1433  pes->pid = pid;
1434  pes->pcr_pid = pcr_pid;
1435  pes->state = MPEGTS_SKIP;
1436  pes->pts = AV_NOPTS_VALUE;
1437  pes->dts = AV_NOPTS_VALUE;
1438  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1439  if (!tss) {
1440  av_free(pes);
1441  return 0;
1442  }
1443  return pes;
1444 }
1445 
1446 #define MAX_LEVEL 4
1447 typedef struct MP4DescrParseContext {
1454  int level;
1457 
1459  const uint8_t *buf, unsigned size,
1460  Mp4Descr *descr, int max_descr_count)
1461 {
1462  if (size > (1 << 30))
1463  return AVERROR_INVALIDDATA;
1464 
1465  ffio_init_context(&d->pb, (unsigned char *)buf, size,
1466  0, NULL, NULL, NULL, NULL);
1467 
1468  d->s = s;
1469  d->level = 0;
1470  d->descr_count = 0;
1471  d->descr = descr;
1472  d->active_descr = NULL;
1473  d->max_descr_count = max_descr_count;
1474 
1475  return 0;
1476 }
1477 
1478 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1479 {
1480  int64_t new_off = avio_tell(pb);
1481  (*len) -= new_off - *off;
1482  *off = new_off;
1483 }
1484 
1485 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1486  int target_tag);
1487 
1488 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1489 {
1490  while (len > 0) {
1491  int ret = parse_mp4_descr(d, off, len, 0);
1492  if (ret < 0)
1493  return ret;
1494  update_offsets(&d->pb.pub, &off, &len);
1495  }
1496  return 0;
1497 }
1498 
1499 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1500 {
1501  AVIOContext *const pb = &d->pb.pub;
1502  avio_rb16(pb); // ID
1503  avio_r8(pb);
1504  avio_r8(pb);
1505  avio_r8(pb);
1506  avio_r8(pb);
1507  avio_r8(pb);
1508  update_offsets(pb, &off, &len);
1509  return parse_mp4_descr_arr(d, off, len);
1510 }
1511 
1512 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1513 {
1514  int id_flags;
1515  if (len < 2)
1516  return 0;
1517  id_flags = avio_rb16(&d->pb.pub);
1518  if (!(id_flags & 0x0020)) { // URL_Flag
1519  update_offsets(&d->pb.pub, &off, &len);
1520  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1521  } else {
1522  return 0;
1523  }
1524 }
1525 
1526 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1527 {
1528  AVIOContext *const pb = &d->pb.pub;
1529  int es_id = 0;
1530  int ret = 0;
1531 
1532  if (d->descr_count >= d->max_descr_count)
1533  return AVERROR_INVALIDDATA;
1534  ff_mp4_parse_es_descr(pb, &es_id);
1535  d->active_descr = d->descr + (d->descr_count++);
1536 
1537  d->active_descr->es_id = es_id;
1538  update_offsets(pb, &off, &len);
1539  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1540  return ret;
1541  update_offsets(pb, &off, &len);
1542  if (len > 0)
1544  d->active_descr = NULL;
1545  return ret;
1546 }
1547 
1549  int len)
1550 {
1551  Mp4Descr *descr = d->active_descr;
1552  if (!descr)
1553  return AVERROR_INVALIDDATA;
1554  d->active_descr->dec_config_descr = av_malloc(len);
1555  if (!descr->dec_config_descr)
1556  return AVERROR(ENOMEM);
1557  descr->dec_config_descr_len = len;
1558  avio_read(&d->pb.pub, descr->dec_config_descr, len);
1559  return 0;
1560 }
1561 
1562 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1563 {
1564  Mp4Descr *descr = d->active_descr;
1565  AVIOContext *const pb = &d->pb.pub;
1566  int predefined;
1567  if (!descr)
1568  return AVERROR_INVALIDDATA;
1569 
1570 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1571  descr->sl.dst = avio_r8(pb); \
1572  if (descr->sl.dst > maxv) { \
1573  descr->sl.dst = maxv; \
1574  return AVERROR_INVALIDDATA; \
1575  } \
1576 } while (0)
1577 
1578  predefined = avio_r8(pb);
1579  if (!predefined) {
1580  int lengths;
1581  int flags = avio_r8(pb);
1582  descr->sl.use_au_start = !!(flags & 0x80);
1583  descr->sl.use_au_end = !!(flags & 0x40);
1584  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1585  descr->sl.use_padding = !!(flags & 0x08);
1586  descr->sl.use_timestamps = !!(flags & 0x04);
1587  descr->sl.use_idle = !!(flags & 0x02);
1588  descr->sl.timestamp_res = avio_rb32(pb);
1589  avio_rb32(pb);
1590  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1591  R8_CHECK_CLIP_MAX(ocr_len, 63);
1592  R8_CHECK_CLIP_MAX(au_len, 31);
1593  descr->sl.inst_bitrate_len = avio_r8(pb);
1594  lengths = avio_rb16(pb);
1595  descr->sl.degr_prior_len = lengths >> 12;
1596  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1597  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1598  } else if (!d->predefined_SLConfigDescriptor_seen){
1599  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1600  d->predefined_SLConfigDescriptor_seen = 1;
1601  }
1602  return 0;
1603 }
1604 
1605 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1606  int target_tag)
1607 {
1608  int tag;
1609  AVIOContext *const pb = &d->pb.pub;
1610  int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1611  int ret = 0;
1612 
1613  update_offsets(pb, &off, &len);
1614  if (len < 0 || len1 > len || len1 <= 0) {
1615  av_log(d->s, AV_LOG_ERROR,
1616  "Tag %x length violation new length %d bytes remaining %d\n",
1617  tag, len1, len);
1618  return AVERROR_INVALIDDATA;
1619  }
1620 
1621  if (d->level++ >= MAX_LEVEL) {
1622  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1624  goto done;
1625  }
1626 
1627  if (target_tag && tag != target_tag) {
1628  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1629  target_tag);
1631  goto done;
1632  }
1633 
1634  switch (tag) {
1635  case MP4IODescrTag:
1636  ret = parse_MP4IODescrTag(d, off, len1);
1637  break;
1638  case MP4ODescrTag:
1639  ret = parse_MP4ODescrTag(d, off, len1);
1640  break;
1641  case MP4ESDescrTag:
1642  ret = parse_MP4ESDescrTag(d, off, len1);
1643  break;
1644  case MP4DecConfigDescrTag:
1645  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1646  break;
1647  case MP4SLDescrTag:
1648  ret = parse_MP4SLDescrTag(d, off, len1);
1649  break;
1650  }
1651 
1652 
1653 done:
1654  d->level--;
1655  avio_seek(pb, off + len1, SEEK_SET);
1656  return ret;
1657 }
1658 
1659 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1660  Mp4Descr *descr, int *descr_count, int max_descr_count)
1661 {
1663  int ret;
1664 
1665  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1666  if (ret < 0)
1667  return ret;
1668 
1669  ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1670 
1671  *descr_count = d.descr_count;
1672  return ret;
1673 }
1674 
1675 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1676  Mp4Descr *descr, int *descr_count, int max_descr_count)
1677 {
1679  int ret;
1680 
1681  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1682  if (ret < 0)
1683  return ret;
1684 
1685  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1686 
1687  *descr_count = d.descr_count;
1688  return ret;
1689 }
1690 
1691 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1692  int section_len)
1693 {
1694  MpegTSContext *ts = filter->u.section_filter.opaque;
1695  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1696  SectionHeader h;
1697  const uint8_t *p, *p_end;
1698  int mp4_descr_count = 0;
1699  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1700  int i, pid;
1701  AVFormatContext *s = ts->stream;
1702 
1703  p_end = section + section_len - 4;
1704  p = section;
1705  if (parse_section_header(&h, &p, p_end) < 0)
1706  return;
1707  if (h.tid != M4OD_TID)
1708  return;
1709  if (skip_identical(&h, tssf))
1710  return;
1711 
1712  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1714 
1715  for (pid = 0; pid < NB_PID_MAX; pid++) {
1716  if (!ts->pids[pid])
1717  continue;
1718  for (i = 0; i < mp4_descr_count; i++) {
1719  PESContext *pes;
1720  AVStream *st;
1721  FFStream *sti;
1722  FFIOContext pb;
1723  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1724  continue;
1725  if (ts->pids[pid]->type != MPEGTS_PES) {
1726  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1727  continue;
1728  }
1729  pes = ts->pids[pid]->u.pes_filter.opaque;
1730  st = pes->st;
1731  if (!st)
1732  continue;
1733  sti = ffstream(st);
1734 
1735  pes->sl = mp4_descr[i].sl;
1736 
1737  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1738  mp4_descr[i].dec_config_descr_len, 0,
1739  NULL, NULL, NULL, NULL);
1741  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1742  st->codecpar->extradata_size > 0)
1743  sti->need_parsing = 0;
1744  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1745  st->codecpar->extradata_size > 0)
1746  sti->need_parsing = 0;
1747 
1749  sti->need_context_update = 1;
1750  }
1751  }
1752  for (i = 0; i < mp4_descr_count; i++)
1753  av_free(mp4_descr[i].dec_config_descr);
1754 }
1755 
1756 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1757  int section_len)
1758 {
1759  AVProgram *prg = NULL;
1760  MpegTSContext *ts = filter->u.section_filter.opaque;
1761 
1762  int idx = ff_find_stream_index(ts->stream, filter->pid);
1763  if (idx < 0)
1764  return;
1765 
1766  /**
1767  * In case we receive an SCTE-35 packet before mpegts context is fully
1768  * initialized.
1769  */
1770  if (!ts->pkt)
1771  return;
1772 
1773  new_data_packet(section, section_len, ts->pkt);
1774  ts->pkt->stream_index = idx;
1775  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1776  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1777  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1778  if (f && f->last_pcr != -1)
1779  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1780  }
1781  ts->stop_parse = 1;
1782 
1783 }
1784 
1785 static const uint8_t opus_coupled_stream_cnt[9] = {
1786  1, 0, 1, 1, 2, 2, 2, 3, 3
1787 };
1788 
1789 static const uint8_t opus_stream_cnt[9] = {
1790  1, 1, 1, 2, 2, 3, 4, 4, 5,
1791 };
1792 
1793 static const uint8_t opus_channel_map[8][8] = {
1794  { 0 },
1795  { 0,1 },
1796  { 0,2,1 },
1797  { 0,1,2,3 },
1798  { 0,4,1,2,3 },
1799  { 0,4,1,2,3,5 },
1800  { 0,4,1,2,3,5,6 },
1801  { 0,6,1,2,3,4,5,7 },
1802 };
1803 
1805  const uint8_t **pp, const uint8_t *desc_list_end,
1806  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1807  MpegTSContext *ts)
1808 {
1809  FFStream *const sti = ffstream(st);
1810  const uint8_t *desc_end;
1811  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1812  char language[252];
1813  int i;
1814 
1815  desc_tag = get8(pp, desc_list_end);
1816  if (desc_tag < 0)
1817  return AVERROR_INVALIDDATA;
1818  desc_len = get8(pp, desc_list_end);
1819  if (desc_len < 0)
1820  return AVERROR_INVALIDDATA;
1821  desc_end = *pp + desc_len;
1822  if (desc_end > desc_list_end)
1823  return AVERROR_INVALIDDATA;
1824 
1825  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1826 
1827  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1828  stream_type == STREAM_TYPE_PRIVATE_DATA)
1829  mpegts_find_stream_type(st, desc_tag, DESC_types);
1830 
1831  switch (desc_tag) {
1833  if (get8(pp, desc_end) & 0x1) {
1835  }
1836  break;
1837  case SL_DESCRIPTOR:
1838  desc_es_id = get16(pp, desc_end);
1839  if (desc_es_id < 0)
1840  break;
1841  if (ts && ts->pids[pid])
1842  ts->pids[pid]->es_id = desc_es_id;
1843  for (i = 0; i < mp4_descr_count; i++)
1844  if (mp4_descr[i].dec_config_descr_len &&
1845  mp4_descr[i].es_id == desc_es_id) {
1846  FFIOContext pb;
1847  ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1848  mp4_descr[i].dec_config_descr_len, 0,
1849  NULL, NULL, NULL, NULL);
1851  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1852  st->codecpar->extradata_size > 0) {
1853  sti->need_parsing = 0;
1854  sti->need_context_update = 1;
1855  }
1857  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1858  }
1859  break;
1860  case FMC_DESCRIPTOR:
1861  if (get16(pp, desc_end) < 0)
1862  break;
1863  if (mp4_descr_count > 0 &&
1865  (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1866  sti->request_probe > 0) &&
1867  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1868  FFIOContext pb;
1869  ffio_init_context(&pb, mp4_descr->dec_config_descr,
1870  mp4_descr->dec_config_descr_len, 0,
1871  NULL, NULL, NULL, NULL);
1873  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1874  st->codecpar->extradata_size > 0) {
1875  sti->request_probe = sti->need_parsing = 0;
1877  sti->need_context_update = 1;
1878  }
1879  }
1880  break;
1881  case 0x56: /* DVB teletext descriptor */
1882  {
1883  uint8_t *extradata = NULL;
1884  int language_count = desc_len / 5, ret;
1885 
1886  if (desc_len > 0 && desc_len % 5 != 0)
1887  return AVERROR_INVALIDDATA;
1888 
1889  if (language_count > 0) {
1890  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1891  av_assert0(language_count <= sizeof(language) / 4);
1892 
1893  if (st->codecpar->extradata == NULL) {
1894  ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1895  if (ret < 0)
1896  return ret;
1897  }
1898 
1899  if (st->codecpar->extradata_size < language_count * 2)
1900  return AVERROR_INVALIDDATA;
1901 
1902  extradata = st->codecpar->extradata;
1903 
1904  for (i = 0; i < language_count; i++) {
1905  language[i * 4 + 0] = get8(pp, desc_end);
1906  language[i * 4 + 1] = get8(pp, desc_end);
1907  language[i * 4 + 2] = get8(pp, desc_end);
1908  language[i * 4 + 3] = ',';
1909 
1910  memcpy(extradata, *pp, 2);
1911  extradata += 2;
1912 
1913  *pp += 2;
1914  }
1915 
1916  language[i * 4 - 1] = 0;
1917  av_dict_set(&st->metadata, "language", language, 0);
1918  sti->need_context_update = 1;
1919  }
1920  }
1921  break;
1922  case 0x59: /* subtitling descriptor */
1923  {
1924  /* 8 bytes per DVB subtitle substream data:
1925  * ISO_639_language_code (3 bytes),
1926  * subtitling_type (1 byte),
1927  * composition_page_id (2 bytes),
1928  * ancillary_page_id (2 bytes) */
1929  int language_count = desc_len / 8, ret;
1930 
1931  if (desc_len > 0 && desc_len % 8 != 0)
1932  return AVERROR_INVALIDDATA;
1933 
1934  if (language_count > 1) {
1935  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1936  }
1937 
1938  if (language_count > 0) {
1939  uint8_t *extradata;
1940 
1941  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1942  av_assert0(language_count <= sizeof(language) / 4);
1943 
1944  if (st->codecpar->extradata == NULL) {
1945  ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1946  if (ret < 0)
1947  return ret;
1948  }
1949 
1950  if (st->codecpar->extradata_size < language_count * 5)
1951  return AVERROR_INVALIDDATA;
1952 
1953  extradata = st->codecpar->extradata;
1954 
1955  for (i = 0; i < language_count; i++) {
1956  language[i * 4 + 0] = get8(pp, desc_end);
1957  language[i * 4 + 1] = get8(pp, desc_end);
1958  language[i * 4 + 2] = get8(pp, desc_end);
1959  language[i * 4 + 3] = ',';
1960 
1961  /* hearing impaired subtitles detection using subtitling_type */
1962  switch (*pp[0]) {
1963  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1964  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1965  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1966  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1967  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1968  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1970  break;
1971  }
1972 
1973  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1974  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1975  extradata += 5;
1976 
1977  *pp += 4;
1978  }
1979 
1980  language[i * 4 - 1] = 0;
1981  av_dict_set(&st->metadata, "language", language, 0);
1982  sti->need_context_update = 1;
1983  }
1984  }
1985  break;
1987  for (i = 0; i + 4 <= desc_len; i += 4) {
1988  language[i + 0] = get8(pp, desc_end);
1989  language[i + 1] = get8(pp, desc_end);
1990  language[i + 2] = get8(pp, desc_end);
1991  language[i + 3] = ',';
1992  switch (get8(pp, desc_end)) {
1993  case 0x01:
1995  break;
1996  case 0x02:
1998  break;
1999  case 0x03:
2002  break;
2003  }
2004  }
2005  if (i && language[0]) {
2006  language[i - 1] = 0;
2007  /* don't overwrite language, as it may already have been set by
2008  * another, more specific descriptor (e.g. supplementary audio) */
2010  }
2011  break;
2013  st->codecpar->codec_tag = bytestream_get_le32(pp);
2014  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2015  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2017  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2018  sti->request_probe = 50;
2019  }
2020  break;
2021  case 0x52: /* stream identifier descriptor */
2022  sti->stream_identifier = 1 + get8(pp, desc_end);
2023  break;
2024  case METADATA_DESCRIPTOR:
2025  if (get16(pp, desc_end) == 0xFFFF)
2026  *pp += 4;
2027  if (get8(pp, desc_end) == 0xFF) {
2028  st->codecpar->codec_tag = bytestream_get_le32(pp);
2029  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2031  }
2032  break;
2033  case 0x7f: /* DVB extension descriptor */
2034  ext_desc_tag = get8(pp, desc_end);
2035  if (ext_desc_tag < 0)
2036  return AVERROR_INVALIDDATA;
2037  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2038  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2039  if (!st->codecpar->extradata) {
2042  if (!st->codecpar->extradata)
2043  return AVERROR(ENOMEM);
2044 
2047 
2048  channel_config_code = get8(pp, desc_end);
2049  if (channel_config_code < 0)
2050  return AVERROR_INVALIDDATA;
2051  if (channel_config_code <= 0x8) {
2052  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2053  AV_WL32(&st->codecpar->extradata[12], 48000);
2054  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2055  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2056  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2057  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2058  st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2059  } else {
2060  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2061  }
2063  sti->need_context_update = 1;
2064  }
2065  }
2066  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2067  int flags;
2068 
2069  if (desc_len < 1)
2070  return AVERROR_INVALIDDATA;
2071  flags = get8(pp, desc_end);
2072 
2073  if ((flags & 0x80) == 0) /* mix_type */
2075 
2076  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2077  case 0x01:
2080  break;
2081  case 0x02:
2083  break;
2084  case 0x03:
2086  break;
2087  }
2088 
2089  if (flags & 0x01) { /* language_code_present */
2090  if (desc_len < 4)
2091  return AVERROR_INVALIDDATA;
2092  language[0] = get8(pp, desc_end);
2093  language[1] = get8(pp, desc_end);
2094  language[2] = get8(pp, desc_end);
2095  language[3] = 0;
2096 
2097  /* This language always has to override a possible
2098  * ISO 639 language descriptor language */
2099  if (language[0])
2100  av_dict_set(&st->metadata, "language", language, 0);
2101  }
2102  }
2103  break;
2104  case 0x6a: /* ac-3_descriptor */
2105  {
2106  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2107  if (component_type_flag) {
2108  int component_type = get8(pp, desc_end);
2109  int service_type_mask = 0x38; // 0b00111000
2110  int service_type = ((component_type & service_type_mask) >> 3);
2111  if (service_type == 0x02 /* 0b010 */) {
2113  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2114  }
2115  }
2116  }
2117  break;
2118  case 0x7a: /* enhanced_ac-3_descriptor */
2119  {
2120  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2121  if (component_type_flag) {
2122  int component_type = get8(pp, desc_end);
2123  int service_type_mask = 0x38; // 0b00111000
2124  int service_type = ((component_type & service_type_mask) >> 3);
2125  if (service_type == 0x02 /* 0b010 */) {
2127  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2128  }
2129  }
2130  }
2131  break;
2132  case 0xfd: /* ARIB data coding type descriptor */
2133  // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2134  // for captions
2135  if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2136  // This structure is defined in STD-B10, part 1, listing 5.4 and
2137  // part 2, 6.2.20).
2138  // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2139  // Component tag limits are documented in TR-B14, fascicle 2,
2140  // Vol. 3, Section 2, 4.2.8.1
2141  int actual_component_tag = sti->stream_identifier - 1;
2142  int picked_profile = FF_PROFILE_UNKNOWN;
2143  int data_component_id = get16(pp, desc_end);
2144  if (data_component_id < 0)
2145  return AVERROR_INVALIDDATA;
2146 
2147  switch (data_component_id) {
2148  case 0x0008:
2149  // [0x30..0x37] are component tags utilized for
2150  // non-mobile captioning service ("profile A").
2151  if (actual_component_tag >= 0x30 &&
2152  actual_component_tag <= 0x37) {
2153  picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2154  }
2155  break;
2156  case 0x0012:
2157  // component tag 0x87 signifies a mobile/partial reception
2158  // (1seg) captioning service ("profile C").
2159  if (actual_component_tag == 0x87) {
2160  picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2161  }
2162  break;
2163  default:
2164  break;
2165  }
2166 
2167  if (picked_profile == FF_PROFILE_UNKNOWN)
2168  break;
2169 
2172  st->codecpar->profile = picked_profile;
2173  sti->request_probe = 0;
2174  }
2175  break;
2176  case 0xb0: /* DOVI video stream descriptor */
2177  {
2178  uint32_t buf;
2180  size_t dovi_size;
2181  int ret;
2182  if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2183  return AVERROR_INVALIDDATA;
2184 
2185  dovi = av_dovi_alloc(&dovi_size);
2186  if (!dovi)
2187  return AVERROR(ENOMEM);
2188 
2189  dovi->dv_version_major = get8(pp, desc_end);
2190  dovi->dv_version_minor = get8(pp, desc_end);
2191  buf = get16(pp, desc_end);
2192  dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2193  dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2194  dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2195  dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2196  dovi->bl_present_flag = buf & 0x01; // 1 bit
2197  if (desc_end - *pp >= 20) { // 4 + 4 * 4
2198  buf = get8(pp, desc_end);
2199  dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2200  } else {
2201  // 0 stands for None
2202  // Dolby Vision V1.2.93 profiles and levels
2204  }
2205 
2207  (uint8_t *)dovi, dovi_size);
2208  if (ret < 0) {
2209  av_free(dovi);
2210  return ret;
2211  }
2212 
2213  av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2214  "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2215  dovi->dv_version_major, dovi->dv_version_minor,
2216  dovi->dv_profile, dovi->dv_level,
2217  dovi->rpu_present_flag,
2218  dovi->el_present_flag,
2219  dovi->bl_present_flag,
2220  dovi->dv_bl_signal_compatibility_id);
2221  }
2222  break;
2223  default:
2224  break;
2225  }
2226  *pp = desc_end;
2227  return 0;
2228 }
2229 
2230 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2231  int stream_identifier, int pmt_stream_idx, struct Program *p)
2232 {
2233  AVFormatContext *s = ts->stream;
2234  int i;
2235  AVStream *found = NULL;
2236 
2237  if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2238  for (i = 0; i < p->nb_streams; i++) {
2239  if (p->streams[i].stream_identifier == stream_identifier)
2240  if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2241  found = s->streams[p->streams[i].idx];
2242  }
2243  } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2244  found = s->streams[p->streams[pmt_stream_idx].idx];
2245  }
2246 
2247  if (found) {
2249  "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2251  i, found->id, pid);
2252  }
2253 
2254  return found;
2255 }
2256 
2257 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2258 {
2259  const uint8_t **pp = &p;
2260  const uint8_t *desc_list_end;
2261  const uint8_t *desc_end;
2262  int desc_list_len;
2263  int desc_len, desc_tag;
2264 
2265  desc_list_len = get16(pp, p_end);
2266  if (desc_list_len < 0)
2267  return -1;
2268  desc_list_len &= 0xfff;
2269  desc_list_end = p + desc_list_len;
2270  if (desc_list_end > p_end)
2271  return -1;
2272 
2273  while (1) {
2274  desc_tag = get8(pp, desc_list_end);
2275  if (desc_tag < 0)
2276  return -1;
2277  desc_len = get8(pp, desc_list_end);
2278  if (desc_len < 0)
2279  return -1;
2280  desc_end = *pp + desc_len;
2281  if (desc_end > desc_list_end)
2282  return -1;
2283 
2284  if (desc_tag == 0x52) {
2285  return get8(pp, desc_end);
2286  }
2287  *pp = desc_end;
2288  }
2289 
2290  return -1;
2291 }
2292 
2293 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2294 {
2295  return !(stream_type == 0x13 ||
2296  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2297 }
2298 
2299 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2300 {
2301  MpegTSContext *ts = filter->u.section_filter.opaque;
2302  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2303  struct Program old_program;
2304  SectionHeader h1, *h = &h1;
2305  PESContext *pes;
2306  AVStream *st;
2307  const uint8_t *p, *p_end, *desc_list_end;
2308  int program_info_length, pcr_pid, pid, stream_type;
2309  int desc_list_len;
2310  uint32_t prog_reg_desc = 0; /* registration descriptor */
2311  int stream_identifier = -1;
2312  struct Program *prg;
2313 
2314  int mp4_descr_count = 0;
2315  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2316  int i;
2317 
2318  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2319  hex_dump_debug(ts->stream, section, section_len);
2320 
2321  p_end = section + section_len - 4;
2322  p = section;
2323  if (parse_section_header(h, &p, p_end) < 0)
2324  return;
2325  if (h->tid != PMT_TID)
2326  return;
2327  if (skip_identical(h, tssf))
2328  return;
2329 
2330  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2331  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2332 
2333  if (!ts->scan_all_pmts && ts->skip_changes)
2334  return;
2335 
2336  prg = get_program(ts, h->id);
2337  if (prg)
2338  old_program = *prg;
2339  else
2340  clear_program(&old_program);
2341 
2342  if (ts->skip_unknown_pmt && !prg)
2343  return;
2344  if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2345  return;
2346  if (!ts->skip_clear)
2347  clear_avprogram(ts, h->id);
2348  clear_program(prg);
2349  add_pid_to_program(prg, ts->current_pid);
2350 
2351  pcr_pid = get16(&p, p_end);
2352  if (pcr_pid < 0)
2353  return;
2354  pcr_pid &= 0x1fff;
2355  add_pid_to_program(prg, pcr_pid);
2356  update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2357 
2358  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2359 
2360  program_info_length = get16(&p, p_end);
2361  if (program_info_length < 0)
2362  return;
2363  program_info_length &= 0xfff;
2364  while (program_info_length >= 2) {
2365  uint8_t tag, len;
2366  tag = get8(&p, p_end);
2367  len = get8(&p, p_end);
2368 
2369  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2370 
2371  program_info_length -= 2;
2372  if (len > program_info_length)
2373  // something else is broken, exit the program_descriptors_loop
2374  break;
2375  program_info_length -= len;
2376  if (tag == IOD_DESCRIPTOR) {
2377  get8(&p, p_end); // scope
2378  get8(&p, p_end); // label
2379  len -= 2;
2380  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2381  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2382  } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2383  prog_reg_desc = bytestream_get_le32(&p);
2384  len -= 4;
2385  }
2386  p += len;
2387  }
2388  p += program_info_length;
2389  if (p >= p_end)
2390  goto out;
2391 
2392  // stop parsing after pmt, we found header
2393  if (!ts->pkt)
2394  ts->stop_parse = 2;
2395 
2396  if (prg)
2397  prg->pmt_found = 1;
2398 
2399  for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2400  st = 0;
2401  pes = NULL;
2402  stream_type = get8(&p, p_end);
2403  if (stream_type < 0)
2404  break;
2405  pid = get16(&p, p_end);
2406  if (pid < 0)
2407  goto out;
2408  pid &= 0x1fff;
2409  if (pid == ts->current_pid)
2410  goto out;
2411 
2412  stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2413 
2414  /* now create stream */
2415  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2416  pes = ts->pids[pid]->u.pes_filter.opaque;
2417  if (ts->merge_pmt_versions && !pes->st) {
2418  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2419  if (st) {
2420  pes->st = st;
2421  pes->stream_type = stream_type;
2422  pes->merged_st = 1;
2423  }
2424  }
2425  if (!pes->st) {
2426  pes->st = avformat_new_stream(pes->stream, NULL);
2427  if (!pes->st)
2428  goto out;
2429  pes->st->id = pes->pid;
2430  }
2431  st = pes->st;
2432  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2433  if (ts->pids[pid])
2434  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2435  pes = add_pes_stream(ts, pid, pcr_pid);
2436  if (ts->merge_pmt_versions && pes && !pes->st) {
2437  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2438  if (st) {
2439  pes->st = st;
2440  pes->stream_type = stream_type;
2441  pes->merged_st = 1;
2442  }
2443  }
2444  if (pes && !pes->st) {
2445  st = avformat_new_stream(pes->stream, NULL);
2446  if (!st)
2447  goto out;
2448  st->id = pes->pid;
2449  }
2450  } else {
2451  int idx = ff_find_stream_index(ts->stream, pid);
2452  if (idx >= 0) {
2453  st = ts->stream->streams[idx];
2454  }
2455  if (ts->merge_pmt_versions && !st) {
2456  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2457  }
2458  if (!st) {
2459  st = avformat_new_stream(ts->stream, NULL);
2460  if (!st)
2461  goto out;
2462  st->id = pid;
2464  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2465  mpegts_find_stream_type(st, stream_type, SCTE_types);
2466  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2467  }
2468  }
2469  }
2470 
2471  if (!st)
2472  goto out;
2473 
2474  if (pes && !pes->stream_type)
2475  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2476 
2477  add_pid_to_program(prg, pid);
2478  if (prg) {
2479  prg->streams[i].idx = st->index;
2480  prg->streams[i].stream_identifier = stream_identifier;
2481  prg->nb_streams++;
2482  }
2483 
2484  av_program_add_stream_index(ts->stream, h->id, st->index);
2485 
2486  desc_list_len = get16(&p, p_end);
2487  if (desc_list_len < 0)
2488  goto out;
2489  desc_list_len &= 0xfff;
2490  desc_list_end = p + desc_list_len;
2491  if (desc_list_end > p_end)
2492  goto out;
2493  for (;;) {
2494  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2495  desc_list_end, mp4_descr,
2496  mp4_descr_count, pid, ts) < 0)
2497  break;
2498 
2499  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2500  stream_type == 0x83 && pes->sub_st) {
2502  pes->sub_st->index);
2503  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2504  }
2505  }
2506  p = desc_list_end;
2507  }
2508 
2509  if (!ts->pids[pcr_pid])
2510  mpegts_open_pcr_filter(ts, pcr_pid);
2511 
2512 out:
2513  for (i = 0; i < mp4_descr_count; i++)
2514  av_free(mp4_descr[i].dec_config_descr);
2515 }
2516 
2517 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2518 {
2519  MpegTSContext *ts = filter->u.section_filter.opaque;
2520  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2521  SectionHeader h1, *h = &h1;
2522  const uint8_t *p, *p_end;
2523  int sid, pmt_pid;
2524  int nb_prg = 0;
2525  AVProgram *program;
2526 
2527  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2528  hex_dump_debug(ts->stream, section, section_len);
2529 
2530  p_end = section + section_len - 4;
2531  p = section;
2532  if (parse_section_header(h, &p, p_end) < 0)
2533  return;
2534  if (h->tid != PAT_TID)
2535  return;
2536  if (ts->skip_changes)
2537  return;
2538 
2539  if (skip_identical(h, tssf))
2540  return;
2541  ts->stream->ts_id = h->id;
2542 
2543  for (;;) {
2544  sid = get16(&p, p_end);
2545  if (sid < 0)
2546  break;
2547  pmt_pid = get16(&p, p_end);
2548  if (pmt_pid < 0)
2549  break;
2550  pmt_pid &= 0x1fff;
2551 
2552  if (pmt_pid == ts->current_pid)
2553  break;
2554 
2555  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2556 
2557  if (sid == 0x0000) {
2558  /* NIT info */
2559  } else {
2560  MpegTSFilter *fil = ts->pids[pmt_pid];
2561  struct Program *prg;
2562  program = av_new_program(ts->stream, sid);
2563  if (program) {
2564  program->program_num = sid;
2565  program->pmt_pid = pmt_pid;
2566  }
2567  if (fil)
2568  if ( fil->type != MPEGTS_SECTION
2569  || fil->pid != pmt_pid
2570  || fil->u.section_filter.section_cb != pmt_cb)
2571  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2572 
2573  if (!ts->pids[pmt_pid])
2574  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2575  prg = add_program(ts, sid);
2576  if (prg) {
2577  unsigned prg_idx = prg - ts->prg;
2578  if (prg->nb_pids && prg->pids[0] != pmt_pid)
2579  clear_program(prg);
2580  add_pid_to_program(prg, pmt_pid);
2581  if (prg_idx > nb_prg)
2582  FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2583  if (prg_idx >= nb_prg)
2584  nb_prg++;
2585  }
2586  }
2587  }
2588  ts->nb_prg = nb_prg;
2589 
2590  if (sid < 0) {
2591  int i,j;
2592  for (j=0; j<ts->stream->nb_programs; j++) {
2593  for (i = 0; i < ts->nb_prg; i++)
2594  if (ts->prg[i].id == ts->stream->programs[j]->id)
2595  break;
2596  if (i==ts->nb_prg && !ts->skip_clear)
2597  clear_avprogram(ts, ts->stream->programs[j]->id);
2598  }
2599  }
2600 }
2601 
2602 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2603 {
2604  MpegTSContext *ts = filter->u.section_filter.opaque;
2605  const uint8_t *p, *p_end;
2606  SectionHeader h1, *h = &h1;
2607 
2608  /*
2609  * Sometimes we receive EPG packets but SDT table do not have
2610  * eit_pres_following or eit_sched turned on, so we open EPG
2611  * stream directly here.
2612  */
2613  if (!ts->epg_stream) {
2615  if (!ts->epg_stream)
2616  return;
2617  ts->epg_stream->id = EIT_PID;
2620  }
2621 
2622  if (ts->epg_stream->discard == AVDISCARD_ALL)
2623  return;
2624 
2625  p_end = section + section_len - 4;
2626  p = section;
2627 
2628  if (parse_section_header(h, &p, p_end) < 0)
2629  return;
2630  if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2631  return;
2632 
2633  av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2634 
2635  /**
2636  * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2637  * is scrambled.
2638  */
2639  if (h->id == 0xFFFF) {
2640  av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2641  return;
2642  }
2643 
2644  /**
2645  * In case we receive an EPG packet before mpegts context is fully
2646  * initialized.
2647  */
2648  if (!ts->pkt)
2649  return;
2650 
2651  new_data_packet(section, section_len, ts->pkt);
2652  ts->pkt->stream_index = ts->epg_stream->index;
2653  ts->stop_parse = 1;
2654 }
2655 
2656 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2657 {
2658  MpegTSContext *ts = filter->u.section_filter.opaque;
2659  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2660  SectionHeader h1, *h = &h1;
2661  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2662  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2663  char *name, *provider_name;
2664 
2665  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2666  hex_dump_debug(ts->stream, section, section_len);
2667 
2668  p_end = section + section_len - 4;
2669  p = section;
2670  if (parse_section_header(h, &p, p_end) < 0)
2671  return;
2672  if (h->tid != SDT_TID)
2673  return;
2674  if (ts->skip_changes)
2675  return;
2676  if (skip_identical(h, tssf))
2677  return;
2678 
2679  onid = get16(&p, p_end);
2680  if (onid < 0)
2681  return;
2682  val = get8(&p, p_end);
2683  if (val < 0)
2684  return;
2685  for (;;) {
2686  sid = get16(&p, p_end);
2687  if (sid < 0)
2688  break;
2689  val = get8(&p, p_end);
2690  if (val < 0)
2691  break;
2692  desc_list_len = get16(&p, p_end);
2693  if (desc_list_len < 0)
2694  break;
2695  desc_list_len &= 0xfff;
2696  desc_list_end = p + desc_list_len;
2697  if (desc_list_end > p_end)
2698  break;
2699  for (;;) {
2700  desc_tag = get8(&p, desc_list_end);
2701  if (desc_tag < 0)
2702  break;
2703  desc_len = get8(&p, desc_list_end);
2704  desc_end = p + desc_len;
2705  if (desc_len < 0 || desc_end > desc_list_end)
2706  break;
2707 
2708  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2709  desc_tag, desc_len);
2710 
2711  switch (desc_tag) {
2712  case 0x48:
2713  service_type = get8(&p, p_end);
2714  if (service_type < 0)
2715  break;
2716  provider_name = getstr8(&p, p_end);
2717  if (!provider_name)
2718  break;
2719  name = getstr8(&p, p_end);
2720  if (name) {
2721  AVProgram *program = av_new_program(ts->stream, sid);
2722  if (program) {
2723  av_dict_set(&program->metadata, "service_name", name, 0);
2724  av_dict_set(&program->metadata, "service_provider",
2725  provider_name, 0);
2726  }
2727  }
2728  av_free(name);
2729  av_free(provider_name);
2730  break;
2731  default:
2732  break;
2733  }
2734  p = desc_end;
2735  }
2736  p = desc_list_end;
2737  }
2738 }
2739 
2740 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2741  const uint8_t *packet);
2742 
2743 /* handle one TS packet */
2744 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2745 {
2746  MpegTSFilter *tss;
2747  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2748  has_adaptation, has_payload;
2749  const uint8_t *p, *p_end;
2750 
2751  pid = AV_RB16(packet + 1) & 0x1fff;
2752  is_start = packet[1] & 0x40;
2753  tss = ts->pids[pid];
2754  if (ts->auto_guess && !tss && is_start) {
2755  add_pes_stream(ts, pid, -1);
2756  tss = ts->pids[pid];
2757  }
2758  if (!tss)
2759  return 0;
2760  if (is_start)
2761  tss->discard = discard_pid(ts, pid);
2762  if (tss->discard)
2763  return 0;
2764  ts->current_pid = pid;
2765 
2766  afc = (packet[3] >> 4) & 3;
2767  if (afc == 0) /* reserved value */
2768  return 0;
2769  has_adaptation = afc & 2;
2770  has_payload = afc & 1;
2771  is_discontinuity = has_adaptation &&
2772  packet[4] != 0 && /* with length > 0 */
2773  (packet[5] & 0x80); /* and discontinuity indicated */
2774 
2775  /* continuity check (currently not used) */
2776  cc = (packet[3] & 0xf);
2777  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2778  cc_ok = pid == 0x1FFF || // null packet PID
2779  is_discontinuity ||
2780  tss->last_cc < 0 ||
2781  expected_cc == cc;
2782 
2783  tss->last_cc = cc;
2784  if (!cc_ok) {
2785  av_log(ts->stream, AV_LOG_DEBUG,
2786  "Continuity check failed for pid %d expected %d got %d\n",
2787  pid, expected_cc, cc);
2788  if (tss->type == MPEGTS_PES) {
2789  PESContext *pc = tss->u.pes_filter.opaque;
2790  pc->flags |= AV_PKT_FLAG_CORRUPT;
2791  }
2792  }
2793 
2794  if (packet[1] & 0x80) {
2795  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2796  if (tss->type == MPEGTS_PES) {
2797  PESContext *pc = tss->u.pes_filter.opaque;
2798  pc->flags |= AV_PKT_FLAG_CORRUPT;
2799  }
2800  }
2801 
2802  p = packet + 4;
2803  if (has_adaptation) {
2804  int64_t pcr_h;
2805  int pcr_l;
2806  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2807  tss->last_pcr = pcr_h * 300 + pcr_l;
2808  /* skip adaptation field */
2809  p += p[0] + 1;
2810  }
2811  /* if past the end of packet, ignore */
2812  p_end = packet + TS_PACKET_SIZE;
2813  if (p >= p_end || !has_payload)
2814  return 0;
2815 
2816  if (pos >= 0) {
2818  ts->pos47_full = pos - TS_PACKET_SIZE;
2819  }
2820 
2821  if (tss->type == MPEGTS_SECTION) {
2822  if (is_start) {
2823  /* pointer field present */
2824  len = *p++;
2825  if (len > p_end - p)
2826  return 0;
2827  if (len && cc_ok) {
2828  /* write remaining section bytes */
2829  write_section_data(ts, tss,
2830  p, len, 0);
2831  /* check whether filter has been closed */
2832  if (!ts->pids[pid])
2833  return 0;
2834  }
2835  p += len;
2836  if (p < p_end) {
2837  write_section_data(ts, tss,
2838  p, p_end - p, 1);
2839  }
2840  } else {
2841  if (cc_ok) {
2842  write_section_data(ts, tss,
2843  p, p_end - p, 0);
2844  }
2845  }
2846 
2847  // stop find_stream_info from waiting for more streams
2848  // when all programs have received a PMT
2849  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2850  int i;
2851  for (i = 0; i < ts->nb_prg; i++) {
2852  if (!ts->prg[i].pmt_found)
2853  break;
2854  }
2855  if (i == ts->nb_prg && ts->nb_prg > 0) {
2856  int types = 0;
2857  for (i = 0; i < ts->stream->nb_streams; i++) {
2858  AVStream *st = ts->stream->streams[i];
2859  if (st->codecpar->codec_type >= 0)
2860  types |= 1<<st->codecpar->codec_type;
2861  }
2862  if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2863  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2865  }
2866  }
2867  }
2868 
2869  } else {
2870  int ret;
2871  // Note: The position here points actually behind the current packet.
2872  if (tss->type == MPEGTS_PES) {
2873  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2874  pos - ts->raw_packet_size)) < 0)
2875  return ret;
2876  }
2877  }
2878 
2879  return 0;
2880 }
2881 
2882 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2883 {
2884  MpegTSContext *ts = s->priv_data;
2885  AVIOContext *pb = s->pb;
2886  int c, i;
2887  uint64_t pos = avio_tell(pb);
2888  int64_t back = FFMIN(seekback, pos);
2889 
2890  //Special case for files like 01c56b0dc1.ts
2891  if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
2892  avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2893  return 0;
2894  }
2895 
2896  avio_seek(pb, -back, SEEK_CUR);
2897 
2898  for (i = 0; i < ts->resync_size; i++) {
2899  c = avio_r8(pb);
2900  if (avio_feof(pb))
2901  return AVERROR_EOF;
2902  if (c == 0x47) {
2903  int new_packet_size, ret;
2904  avio_seek(pb, -1, SEEK_CUR);
2905  pos = avio_tell(pb);
2907  if (ret < 0)
2908  return ret;
2909  new_packet_size = get_packet_size(s);
2910  if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2911  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2912  ts->raw_packet_size = new_packet_size;
2913  }
2914  avio_seek(pb, pos, SEEK_SET);
2915  return 0;
2916  }
2917  }
2919  "max resync size reached, could not find sync byte\n");
2920  /* no sync found */
2921  return AVERROR_INVALIDDATA;
2922 }
2923 
2924 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2925 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2926  const uint8_t **data)
2927 {
2928  AVIOContext *pb = s->pb;
2929  int len;
2930 
2931  for (;;) {
2933  if (len != TS_PACKET_SIZE)
2934  return len < 0 ? len : AVERROR_EOF;
2935  /* check packet sync byte */
2936  if ((*data)[0] != 0x47) {
2937  /* find a new packet start */
2938 
2939  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2940  return AVERROR(EAGAIN);
2941  else
2942  continue;
2943  } else {
2944  break;
2945  }
2946  }
2947  return 0;
2948 }
2949 
2950 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2951 {
2952  AVIOContext *pb = s->pb;
2953  int skip = raw_packet_size - TS_PACKET_SIZE;
2954  if (skip > 0)
2955  avio_skip(pb, skip);
2956 }
2957 
2958 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2959 {
2960  AVFormatContext *s = ts->stream;
2961  uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2962  const uint8_t *data;
2963  int64_t packet_num;
2964  int ret = 0;
2965 
2966  if (avio_tell(s->pb) != ts->last_pos) {
2967  int i;
2968  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2969  /* seek detected, flush pes buffer */
2970  for (i = 0; i < NB_PID_MAX; i++) {
2971  if (ts->pids[i]) {
2972  if (ts->pids[i]->type == MPEGTS_PES) {
2973  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2974  av_buffer_unref(&pes->buffer);
2975  pes->data_index = 0;
2976  pes->state = MPEGTS_SKIP; /* skip until pes header */
2977  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2978  ts->pids[i]->u.section_filter.last_ver = -1;
2979  }
2980  ts->pids[i]->last_cc = -1;
2981  ts->pids[i]->last_pcr = -1;
2982  }
2983  }
2984  }
2985 
2986  ts->stop_parse = 0;
2987  packet_num = 0;
2988  memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2989  for (;;) {
2990  packet_num++;
2991  if (nb_packets != 0 && packet_num >= nb_packets ||
2992  ts->stop_parse > 1) {
2993  ret = AVERROR(EAGAIN);
2994  break;
2995  }
2996  if (ts->stop_parse > 0)
2997  break;
2998 
2999  ret = read_packet(s, packet, ts->raw_packet_size, &data);
3000  if (ret != 0)
3001  break;
3002  ret = handle_packet(ts, data, avio_tell(s->pb));
3004  if (ret != 0)
3005  break;
3006  }
3007  ts->last_pos = avio_tell(s->pb);
3008  return ret;
3009 }
3010 
3011 static int mpegts_probe(const AVProbeData *p)
3012 {
3013  const int size = p->buf_size;
3014  int maxscore = 0;
3015  int sumscore = 0;
3016  int i;
3017  int check_count = size / TS_FEC_PACKET_SIZE;
3018 #define CHECK_COUNT 10
3019 #define CHECK_BLOCK 100
3020 
3021  if (!check_count)
3022  return 0;
3023 
3024  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3025  int left = FFMIN(check_count - i, CHECK_BLOCK);
3026  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3029  score = FFMAX3(score, dvhs_score, fec_score);
3030  sumscore += score;
3031  maxscore = FFMAX(maxscore, score);
3032  }
3033 
3034  sumscore = sumscore * CHECK_COUNT / check_count;
3035  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3036 
3037  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3038 
3039  if (check_count > CHECK_COUNT && sumscore > 6) {
3040  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3041  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3042  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3043  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3044  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3045  } else if (sumscore > 6) {
3046  return 2;
3047  } else {
3048  return 0;
3049  }
3050 }
3051 
3052 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3053  * (-1) if not available */
3054 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3055 {
3056  int afc, len, flags;
3057  const uint8_t *p;
3058  unsigned int v;
3059 
3060  afc = (packet[3] >> 4) & 3;
3061  if (afc <= 1)
3062  return AVERROR_INVALIDDATA;
3063  p = packet + 4;
3064  len = p[0];
3065  p++;
3066  if (len == 0)
3067  return AVERROR_INVALIDDATA;
3068  flags = *p++;
3069  len--;
3070  if (!(flags & 0x10))
3071  return AVERROR_INVALIDDATA;
3072  if (len < 6)
3073  return AVERROR_INVALIDDATA;
3074  v = AV_RB32(p);
3075  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3076  *ppcr_low = ((p[4] & 1) << 8) | p[5];
3077  return 0;
3078 }
3079 
3080 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3081 
3082  /* NOTE: We attempt to seek on non-seekable files as well, as the
3083  * probe buffer usually is big enough. Only warn if the seek failed
3084  * on files where the seek should work. */
3085  if (avio_seek(pb, pos, SEEK_SET) < 0)
3086  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3087 }
3088 
3090 {
3091  MpegTSContext *ts = s->priv_data;
3092  AVIOContext *pb = s->pb;
3093  int64_t pos, probesize = s->probesize;
3094  int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3095 
3097 
3098  if (ffio_ensure_seekback(pb, seekback) < 0)
3099  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3100 
3101  pos = avio_tell(pb);
3103  if (ts->raw_packet_size <= 0) {
3104  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3106  }
3107  ts->stream = s;
3108  ts->auto_guess = 0;
3109 
3110  if (s->iformat == &ff_mpegts_demuxer) {
3111  /* normal demux */
3112 
3113  /* first do a scan to get all the services */
3114  seek_back(s, pb, pos);
3115 
3119 
3120  handle_packets(ts, probesize / ts->raw_packet_size);
3121  /* if could not find service, enable auto_guess */
3122 
3123  ts->auto_guess = 1;
3124 
3125  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3126 
3127  s->ctx_flags |= AVFMTCTX_NOHEADER;
3128  } else {
3129  AVStream *st;
3130  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3131  int64_t pcrs[2], pcr_h;
3132  uint8_t packet[TS_PACKET_SIZE];
3133  const uint8_t *data;
3134 
3135  /* only read packets */
3136 
3137  st = avformat_new_stream(s, NULL);
3138  if (!st)
3139  return AVERROR(ENOMEM);
3140  avpriv_set_pts_info(st, 60, 1, 27000000);
3143 
3144  /* we iterate until we find two PCRs to estimate the bitrate */
3145  pcr_pid = -1;
3146  nb_pcrs = 0;
3147  nb_packets = 0;
3148  for (;;) {
3149  ret = read_packet(s, packet, ts->raw_packet_size, &data);
3150  if (ret < 0)
3151  return ret;
3152  pid = AV_RB16(data + 1) & 0x1fff;
3153  if ((pcr_pid == -1 || pcr_pid == pid) &&
3154  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3156  pcr_pid = pid;
3157  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3158  nb_pcrs++;
3159  if (nb_pcrs >= 2) {
3160  if (pcrs[1] - pcrs[0] > 0) {
3161  /* the difference needs to be positive to make sense for bitrate computation */
3162  break;
3163  } else {
3164  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3165  pcrs[0] = pcrs[1];
3166  nb_pcrs--;
3167  }
3168  }
3169  } else {
3171  }
3172  nb_packets++;
3173  }
3174 
3175  /* NOTE1: the bitrate is computed without the FEC */
3176  /* NOTE2: it is only the bitrate of the start of the stream */
3177  ts->pcr_incr = pcrs[1] - pcrs[0];
3178  ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3179  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3180  st->codecpar->bit_rate = s->bit_rate;
3181  st->start_time = ts->cur_pcr;
3182  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3183  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3184  }
3185 
3186  seek_back(s, pb, pos);
3187  return 0;
3188 }
3189 
3190 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3191 
3193 {
3194  MpegTSContext *ts = s->priv_data;
3195  int ret, i;
3196  int64_t pcr_h, next_pcr_h, pos;
3197  int pcr_l, next_pcr_l;
3198  uint8_t pcr_buf[12];
3199  const uint8_t *data;
3200 
3201  if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3202  return ret;
3204  pkt->pos = avio_tell(s->pb);
3205  if (ret < 0) {
3206  return ret;
3207  }
3208  if (data != pkt->data)
3209  memcpy(pkt->data, data, TS_PACKET_SIZE);
3211  if (ts->mpeg2ts_compute_pcr) {
3212  /* compute exact PCR for each packet */
3213  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3214  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3215  pos = avio_tell(s->pb);
3216  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3217  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3218  avio_read(s->pb, pcr_buf, 12);
3219  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3220  /* XXX: not precise enough */
3221  ts->pcr_incr =
3222  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3223  (i + 1);
3224  break;
3225  }
3226  }
3227  avio_seek(s->pb, pos, SEEK_SET);
3228  /* no next PCR found: we use previous increment */
3229  ts->cur_pcr = pcr_h * 300 + pcr_l;
3230  }
3231  pkt->pts = ts->cur_pcr;
3232  pkt->duration = ts->pcr_incr;
3233  ts->cur_pcr += ts->pcr_incr;
3234  }
3235  pkt->stream_index = 0;
3236  return 0;
3237 }
3238 
3240 {
3241  MpegTSContext *ts = s->priv_data;
3242  int ret, i;
3243 
3244  pkt->size = -1;
3245  ts->pkt = pkt;
3246  ret = handle_packets(ts, 0);
3247  if (ret < 0) {
3248  av_packet_unref(ts->pkt);
3249  /* flush pes data left */
3250  for (i = 0; i < NB_PID_MAX; i++)
3251  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3252  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3253  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3254  ret = new_pes_packet(pes, pkt);
3255  if (ret < 0)
3256  return ret;
3257  pes->state = MPEGTS_SKIP;
3258  ret = 0;
3259  break;
3260  }
3261  }
3262  }
3263 
3264  if (!ret && pkt->size < 0)
3266  return ret;
3267 }
3268 
3269 static void mpegts_free(MpegTSContext *ts)
3270 {
3271  int i;
3272 
3273  clear_programs(ts);
3274 
3275  for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3276  av_buffer_pool_uninit(&ts->pools[i]);
3277 
3278  for (i = 0; i < NB_PID_MAX; i++)
3279  if (ts->pids[i])
3280  mpegts_close_filter(ts, ts->pids[i]);
3281 }
3282 
3284 {
3285  MpegTSContext *ts = s->priv_data;
3286  mpegts_free(ts);
3287  return 0;
3288 }
3289 
3290 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3291  int64_t *ppos, int64_t pos_limit)
3292 {
3293  MpegTSContext *ts = s->priv_data;
3294  int64_t pos, timestamp;
3295  uint8_t buf[TS_PACKET_SIZE];
3296  int pcr_l, pcr_pid =
3297  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3298  int pos47 = ts->pos47_full % ts->raw_packet_size;
3299  pos =
3300  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3301  ts->raw_packet_size + pos47;
3302  while(pos < pos_limit) {
3303  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3304  return AV_NOPTS_VALUE;
3305  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3306  return AV_NOPTS_VALUE;
3307  if (buf[0] != 0x47) {
3308  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3309  return AV_NOPTS_VALUE;
3310  pos = avio_tell(s->pb);
3311  continue;
3312  }
3313  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3314  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3315  *ppos = pos;
3316  return timestamp;
3317  }
3318  pos += ts->raw_packet_size;
3319  }
3320 
3321  return AV_NOPTS_VALUE;
3322 }
3323 
3324 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3325  int64_t *ppos, int64_t pos_limit)
3326 {
3327  MpegTSContext *ts = s->priv_data;
3328  AVPacket *pkt;
3329  int64_t pos;
3330  int pos47 = ts->pos47_full % ts->raw_packet_size;
3331  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3333  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3334  return AV_NOPTS_VALUE;
3335  pkt = av_packet_alloc();
3336  if (!pkt)
3337  return AV_NOPTS_VALUE;
3338  while(pos < pos_limit) {
3339  int ret = av_read_frame(s, pkt);
3340  if (ret < 0) {
3341  av_packet_free(&pkt);
3342  return AV_NOPTS_VALUE;
3343  }
3344  if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3346  av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3347  if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3348  int64_t dts = pkt->dts;
3349  *ppos = pkt->pos;
3350  av_packet_free(&pkt);
3351  return dts;
3352  }
3353  }
3354  pos = pkt->pos;
3356  }
3357 
3358  av_packet_free(&pkt);
3359  return AV_NOPTS_VALUE;
3360 }
3361 
3362 /**************************************************************/
3363 /* parsing functions - called from other demuxers such as RTP */
3364 
3366 {
3367  MpegTSContext *ts;
3368 
3369  ts = av_mallocz(sizeof(MpegTSContext));
3370  if (!ts)
3371  return NULL;
3372  /* no stream case, currently used by RTP */
3374  ts->stream = s;
3375  ts->auto_guess = 1;
3376 
3380 
3381  return ts;
3382 }
3383 
3384 /* return the consumed length if a packet was output, or -1 if no
3385  * packet is output */
3387  const uint8_t *buf, int len)
3388 {
3389  int len1;
3390 
3391  len1 = len;
3392  ts->pkt = pkt;
3393  for (;;) {
3394  ts->stop_parse = 0;
3395  if (len < TS_PACKET_SIZE)
3396  return AVERROR_INVALIDDATA;
3397  if (buf[0] != 0x47) {
3398  buf++;
3399  len--;
3400  } else {
3401  handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3402  buf += TS_PACKET_SIZE;
3403  len -= TS_PACKET_SIZE;
3404  if (ts->stop_parse == 1)
3405  break;
3406  }
3407  }
3408  return len1 - len;
3409 }
3410 
3412 {
3413  mpegts_free(ts);
3414  av_free(ts);
3415 }
3416 
3418  .name = "mpegts",
3419  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3420  .priv_data_size = sizeof(MpegTSContext),
3427  .priv_class = &mpegts_class,
3428 };
3429 
3431  .name = "mpegtsraw",
3432  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3433  .priv_data_size = sizeof(MpegTSContext),
3439  .priv_class = &mpegtsraw_class,
3440 };
parse_MP4DecConfigDescrTag
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1548
mpegts_set_stream_info
static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:902
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:417
parse_mp4_descr_arr
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1488
new_pes_packet
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:1003
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
av_buffer_pool_init
AVBufferPool * av_buffer_pool_init(size_t size, AVBufferRef *(*alloc)(size_t size))
Allocate and initialize a buffer pool.
Definition: buffer.c:280
skip_bits_long
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
Definition: get_bits.h:292
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
StreamType::stream_type
uint32_t stream_type
Definition: mpegts.c:785
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
MP4DescrParseContext::descr_count
int descr_count
Definition: mpegts.c:1452
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
MP4DecConfigDescrTag
#define MP4DecConfigDescrTag
Definition: isom.h:313
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:426
program
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C program
Definition: undefined.txt:6
MPEGTS_PESHEADER_FILL
@ MPEGTS_PESHEADER_FILL
Definition: mpegts.c:235
MpegTSFilter::discard
int discard
Definition: mpegts.c:102
Program::nb_streams
unsigned int nb_streams
Definition: mpegts.c:121
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:850
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:724
MAX_LEVEL
#define MAX_LEVEL
Definition: mpegts.c:1446
AV_CODEC_ID_PCM_BLURAY
@ AV_CODEC_ID_PCM_BLURAY
Definition: codec_id.h:338
FFFormatContext::prefer_codec_framerate
int prefer_codec_framerate
Definition: internal.h:178
PAT_PID
#define PAT_PID
Definition: mpegts.h:37
AV_OPT_FLAG_READONLY
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:290
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVFMT_SHOW_IDS
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:465
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
mpegts.h
AVProgram::nb_stream_indexes
unsigned int nb_stream_indexes
Definition: avformat.h:1038
AV_PKT_DATA_MPEGTS_STREAM_ID
@ AV_PKT_DATA_MPEGTS_STREAM_ID
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: packet.h:215
out
FILE * out
Definition: movenc.c:54
ff_parse_pes_pts
static int64_t ff_parse_pes_pts(const uint8_t *buf)
Parse MPEG-PES five-byte timestamp.
Definition: mpeg.h:68
TS_DVHS_PACKET_SIZE
#define TS_DVHS_PACKET_SIZE
Definition: mpegts.h:28
pmt_cb
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2299
AVBufferPool
The buffer pool.
Definition: buffer_internal.h:89
MpegTSFilter::pid
int pid
Definition: mpegts.c:98
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:186
ffio_read_indirect
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:684
STREAM_TYPE_PRIVATE_DATA
#define STREAM_TYPE_PRIVATE_DATA
Definition: mpeg.h:54
PESContext::flags
int flags
copied to the AVPacket flags
Definition: mpegts.c:256
AVStream::priv_data
void * priv_data
Definition: avformat.h:866
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
avpriv_mpegts_parse_packet
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
Definition: mpegts.c:3386
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
opus_default_extradata
static const uint8_t opus_default_extradata[30]
Definition: opus.h:57
avcodec_get_type
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
Definition: codec_desc.c:3546
AVStream::discard
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:906
av_find_program_from_stream
AVProgram * av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
Find the programs which belong to a given stream.
Definition: utils.c:485
STREAM_ID_EMM_STREAM
#define STREAM_ID_EMM_STREAM
Definition: mpegts.h:150
mpegts_close_filter
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
Definition: mpegts.c:553
STREAM_ID_PADDING_STREAM
#define STREAM_ID_PADDING_STREAM
Definition: mpegts.h:145
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:166
STREAM_ID_PROGRAM_STREAM_MAP
#define STREAM_ID_PROGRAM_STREAM_MAP
Definition: mpegts.h:143
SLConfigDescr::au_seq_num_len
int au_seq_num_len
Definition: mpegts.h:187
Program::pmt_found
int pmt_found
have we found pmt for this program
Definition: mpegts.c:125
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:220
PESContext::dts
int64_t dts
Definition: mpegts.c:261
METADATA_types
static const StreamType METADATA_types[]
Definition: mpegts.c:868
av_unused
#define av_unused
Definition: attributes.h:131
MP4DescrParseContext::max_descr_count
int max_descr_count
Definition: mpegts.c:1453
Stream::stream_identifier
int stream_identifier
Definition: mpegts.c:112
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: codec_id.h:62
MpegTSContext::skip_changes
int skip_changes
Definition: mpegts.c:157
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1177
ff_mp4_read_dec_config_descr
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:330
index
fg index
Definition: ffmpeg_filter.c:168
mpegts_find_stream_type
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:884
MpegTSContext::auto_guess
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:138
AVPacket::data
uint8_t * data
Definition: packet.h:373
AV_CODEC_ID_DVB_TELETEXT
@ AV_CODEC_ID_DVB_TELETEXT
Definition: codec_id.h:529
clear_avprogram
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:282
CHECK_BLOCK
#define CHECK_BLOCK
AVOption
AVOption.
Definition: opt.h:247
MpegTSSectionFilter
Definition: mpegts.c:84
MPEGTS_SECTION
@ MPEGTS_SECTION
Definition: mpegts.c:66
getstr8
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:688
MpegTSSectionFilter::section_h_size
int section_h_size
Definition: mpegts.c:86
AV_CODEC_ID_AVS2
@ AV_CODEC_ID_AVS2
Definition: codec_id.h:244
data
const char data[16]
Definition: mxf.c:143
opus.h
MpegTSFilter::section_filter
MpegTSSectionFilter section_filter
Definition: mpegts.c:106
HLS_SAMPLE_ENC_types
static const StreamType HLS_SAMPLE_ENC_types[]
Definition: mpegts.c:844
MpegTSState
MpegTSState
Definition: mpegts.c:232
MP4SLDescrTag
#define MP4SLDescrTag
Definition: isom.h:315
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
MP4DescrParseContext::s
AVFormatContext * s
Definition: mpegts.c:1448
buffer_pool_get
static AVBufferRef * buffer_pool_get(MpegTSContext *ts, int size)
Definition: mpegts.c:1121
PES_HEADER_SIZE
#define PES_HEADER_SIZE
Definition: mpegts.c:242
fc
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:551
AVFormatContext::programs
AVProgram ** programs
Definition: avformat.h:1278
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
mathematics.h
filter
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
Definition: filter_design.txt:228
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
SetServiceCallback
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:82
av_read_frame
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: demux.c:1414
avcodec_is_open
int avcodec_is_open(AVCodecContext *s)
Definition: avcodec.c:713
Stream::idx
int idx
Definition: mpegts.c:111
AV_CODEC_ID_HDMV_PGS_SUBTITLE
@ AV_CODEC_ID_HDMV_PGS_SUBTITLE
Definition: codec_id.h:528
add_pid_to_program
static void add_pid_to_program(struct Program *p, unsigned int pid)
Definition: mpegts.c:328
PESContext::pts
int64_t pts
Definition: mpegts.c:261
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:467
MAX_PES_PAYLOAD
#define MAX_PES_PAYLOAD
Definition: mpegts.c:50
FFIOContext
Definition: avio_internal.h:29
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:660
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
MpegTSContext::nb_prg
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:170
MpegTSPESFilter::pes_cb
PESCallback * pes_cb
Definition: mpegts.c:76
Program::streams
struct Stream streams[MAX_STREAMS_PER_PROGRAM]
Definition: mpegts.c:122
AV_CODEC_ID_BIN_DATA
@ AV_CODEC_ID_BIN_DATA
Definition: codec_id.h:562
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
PESContext::pcr_pid
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:247
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:797
SectionHeader::id
uint16_t id
Definition: mpegts.c:643
SLConfigDescr::use_idle
int use_idle
Definition: mpegts.h:180
crc.h
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:468
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
PROBE_PACKET_MAX_BUF
#define PROBE_PACKET_MAX_BUF
Definition: mpegts.c:61
mpegtsraw_class
static const AVClass mpegtsraw_class
Definition: mpegts.c:223
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
PESContext::state
enum MpegTSState state
Definition: mpegts.c:253
MpegTSFilter::pes_filter
MpegTSPESFilter pes_filter
Definition: mpegts.c:105
METADATA_DESCRIPTOR
#define METADATA_DESCRIPTOR
Definition: mpegts.h:164
SLConfigDescr::inst_bitrate_len
int inst_bitrate_len
Definition: mpegts.h:185
REGISTRATION_DESCRIPTOR
#define REGISTRATION_DESCRIPTOR
Definition: mpegts.h:159
mpegts_read_close
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:3283
mpegts_raw_read_packet
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3192
find_matching_stream
static AVStream * find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid, int stream_identifier, int pmt_stream_idx, struct Program *p)
Definition: mpegts.c:2230
update_av_program_info
static void update_av_program_info(AVFormatContext *s, unsigned int programid, unsigned int pid, int version)
Definition: mpegts.c:344
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:429
MP4ODescrTag
#define MP4ODescrTag
Definition: isom.h:310
PESCallback
int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
Definition: mpegts.c:72
VIDEO_STREAM_DESCRIPTOR
#define VIDEO_STREAM_DESCRIPTOR
Definition: mpegts.h:158
STREAM_ID_DSMCC_STREAM
#define STREAM_ID_DSMCC_STREAM
Definition: mpegts.h:151
av_add_index_entry
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: seek.c:117
pat_cb
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2517
GetBitContext
Definition: get_bits.h:62
Program::nb_pids
unsigned int nb_pids
Definition: mpegts.c:119
SLConfigDescr::use_padding
int use_padding
Definition: mpegts.h:178
mp4_read_iods
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:1659
AVProgram::discard
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1036
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:141
AV_DISPOSITION_STILL_IMAGE
#define AV_DISPOSITION_STILL_IMAGE
still images in video stream (still_picture_flag=1 in mpegts)
Definition: avformat.h:841
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:486
SectionHeader::last_sec_num
uint8_t last_sec_num
Definition: mpegts.c:646
val
static double val(void *priv, double ch)
Definition: aeval.c:76
EIT_TID
#define EIT_TID
Definition: mpegts.h:95
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
MP4IODescrTag
#define MP4IODescrTag
Definition: isom.h:311
PESContext::sl
SLConfigDescr sl
Definition: mpegts.c:265
SLConfigDescr::use_rand_acc_pt
int use_rand_acc_pt
Definition: mpegts.h:177
SDT_PID
#define SDT_PID
Definition: mpegts.h:43
av_new_program
AVProgram * av_new_program(AVFormatContext *s, int id)
Definition: utils.c:804
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:424
PESContext::stream
AVFormatContext * stream
Definition: mpegts.c:250
SLConfigDescr::timestamp_len
int timestamp_len
Definition: mpegts.h:182
MAX_SECTION_SIZE
#define MAX_SECTION_SIZE
Definition: mpegts.h:34
av_dovi_alloc
AVDOVIDecoderConfigurationRecord * av_dovi_alloc(size_t *size)
Allocate a AVDOVIDecoderConfigurationRecord structure and initialize its fields to default values.
Definition: dovi_meta.c:24
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: codec_id.h:523
PESContext::sub_st
AVStream * sub_st
stream for the embedded AC3 stream in HDMV TrueHD
Definition: mpegts.c:252
ff_mp4_parse_es_descr
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:305
MpegTSContext::merge_pmt_versions
int merge_pmt_versions
Definition: mpegts.c:164
AV_DISPOSITION_CLEAN_EFFECTS
#define AV_DISPOSITION_CLEAN_EFFECTS
stream without voice
Definition: avformat.h:819
PESContext::header
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:263
avassert.h
MPEGTS_OPTIONS
#define MPEGTS_OPTIONS
Definition: mpegts.c:182
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:773
MpegTSContext::pos47_full
int64_t pos47_full
Definition: mpegts.c:135
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:206
avpriv_mpegts_parse_close
void avpriv_mpegts_parse_close(MpegTSContext *ts)
Definition: mpegts.c:3411
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AVInputFormat
Definition: avformat.h:638
StreamType::codec_id
enum AVCodecID codec_id
Definition: mpegts.c:787
PESContext
Definition: mpegts.c:245
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:426
Mp4Descr::sl
SLConfigDescr sl
Definition: mpegts.h:195
opus_coupled_stream_cnt
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1785
AVFormatContext::ctx_flags
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1158
AVProgram::id
int id
Definition: avformat.h:1034
ff_parse_mpeg2_descriptor
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:1804
MpegTSContext::pools
AVBufferPool * pools[32]
Definition: mpegts.c:179
parse_pcr
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:3054
AV_CODEC_ID_S302M
@ AV_CODEC_ID_S302M
Definition: codec_id.h:340
av_buffer_pool_get
AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)
Allocate a new AVBuffer, reusing an old buffer from the pool when available.
Definition: buffer.c:387
MpegTSContext::stream
AVFormatContext * stream
Definition: mpegts.c:131
AV_CODEC_ID_MPEG4SYSTEMS
@ AV_CODEC_ID_MPEG4SYSTEMS
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: codec_id.h:569
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
mpegts_get_pcr
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3290
mpegts_class
static const AVClass mpegts_class
Definition: mpegts.c:204
AVFormatContext::nb_programs
unsigned int nb_programs
Definition: avformat.h:1277
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:643
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
FF_PROFILE_ARIB_PROFILE_C
#define FF_PROFILE_ARIB_PROFILE_C
Definition: avcodec.h:1641
bits
uint8_t bits
Definition: vp3data.h:141
SLConfigDescr::degr_prior_len
int degr_prior_len
Definition: mpegts.h:186
FF_PROFILE_UNKNOWN
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:1526
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
mpegts_open_filter
static MpegTSFilter * mpegts_open_filter(MpegTSContext *ts, unsigned int pid, enum MpegTSFilterType type)
Definition: mpegts.c:482
AVDOVIDecoderConfigurationRecord::dv_profile
uint8_t dv_profile
Definition: dovi_meta.h:54
PES_START_SIZE
#define PES_START_SIZE
Definition: mpegts.c:241
MpegTSContext::resync_size
int resync_size
Definition: mpegts.c:163
channels
channels
Definition: aptx.h:33
get_bits.h
SectionHeader::sec_num
uint8_t sec_num
Definition: mpegts.c:645
STREAM_ID_TYPE_E_STREAM
#define STREAM_ID_TYPE_E_STREAM
Definition: mpegts.h:152
nb_streams
static int nb_streams
Definition: ffprobe.c:289
PESContext::stream_type
int stream_type
Definition: mpegts.c:248
parse_MP4IODescrTag
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1499
PMT_TID
#define PMT_TID
Definition: mpegts.h:81
skip_identical
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:649
opus_stream_cnt
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1789
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
f
#define f(width, name)
Definition: cbs_vp9.c:255
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
AVDOVIDecoderConfigurationRecord::dv_version_major
uint8_t dv_version_major
Definition: dovi_meta.h:52
MPEGTS_SKIP
@ MPEGTS_SKIP
Definition: mpegts.c:237
MpegTSPESFilter::opaque
void * opaque
Definition: mpegts.c:77
get8
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:660
discard_pid
static int discard_pid(MpegTSContext *ts, unsigned int pid)
discard_pid() decides if the pid is to be discarded according to caller's programs selection
Definition: mpegts.c:374
AV_CODEC_ID_ARIB_CAPTION
@ AV_CODEC_ID_ARIB_CAPTION
Definition: codec_id.h:547
if
if(ret)
Definition: filter_design.txt:179
MpegTSContext::cur_pcr
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:146
clear_programs
static void clear_programs(MpegTSContext *ts)
Definition: mpegts.c:306
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:402
MP4ESDescrTag
#define MP4ESDescrTag
Definition: isom.h:312
AV_CODEC_ID_AVS3
@ AV_CODEC_ID_AVS3
Definition: codec_id.h:246
MP4DescrParseContext::active_descr
Mp4Descr * active_descr
Definition: mpegts.c:1451
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AVFormatContext
Format I/O context.
Definition: avformat.h:1109
MpegTSFilter::u
union MpegTSFilter::@269 u
FMC_DESCRIPTOR
#define FMC_DESCRIPTOR
Definition: mpegts.h:163
internal.h
MpegTSContext::pcr_incr
int64_t pcr_incr
used to estimate the exact PCR
Definition: mpegts.c:147
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:356
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1004
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
AVDOVIDecoderConfigurationRecord::dv_level
uint8_t dv_level
Definition: dovi_meta.h:55
AVDOVIDecoderConfigurationRecord::dv_bl_signal_compatibility_id
uint8_t dv_bl_signal_compatibility_id
Definition: dovi_meta.h:59
MPEGTS_HEADER
@ MPEGTS_HEADER
Definition: mpegts.c:233
MpegTSSectionFilter::crc
unsigned crc
Definition: mpegts.c:88
av_buffer_unref
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:139
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
MpegTSContext::stop_parse
int stop_parse
stop parsing loop
Definition: mpegts.c:151
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1060
isom.h
AV_CODEC_ID_TIMED_ID3
@ AV_CODEC_ID_TIMED_ID3
Definition: codec_id.h:561
MpegTSContext::current_pid
int current_pid
Definition: mpegts.c:176
MpegTSSectionFilter::section_index
int section_index
Definition: mpegts.c:85
MpegTSContext::last_pos
int64_t last_pos
to detect seek
Definition: mpegts.c:155
Mp4Descr::es_id
int es_id
Definition: mpegts.h:192
MpegTSFilter::es_id
int es_id
Definition: mpegts.c:99
MPEGTS_PESHEADER
@ MPEGTS_PESHEADER
Definition: mpegts.c:234
DESC_types
static const StreamType DESC_types[]
Definition: mpegts.c:875
PESContext::extended_stream_id
int extended_stream_id
Definition: mpegts.c:259
av_stream_add_side_data
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:1686
Mp4Descr::dec_config_descr_len
int dec_config_descr_len
Definition: mpegts.h:193
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
MpegTSSectionFilter::section_buf
uint8_t * section_buf
Definition: mpegts.c:90
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
eit_cb
static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2602
av_buffer_pool_uninit
void av_buffer_pool_uninit(AVBufferPool **ppool)
Mark the pool as being available for freeing.
Definition: buffer.c:322
MpegTSFilter::type
enum MpegTSFilterType type
Definition: mpegts.c:103
mpegts_open_pcr_filter
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:548
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
SectionHeader::version
uint8_t version
Definition: mpegts.c:644
seek_back
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:3080
SLConfigDescr::ocr_len
int ocr_len
Definition: mpegts.h:183
AVProgram::stream_index
unsigned int * stream_index
Definition: avformat.h:1037
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:915
AV_CODEC_ID_MPEG2TS
@ AV_CODEC_ID_MPEG2TS
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: codec_id.h:567
add_pes_stream
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1422
MpegTSFilterType
MpegTSFilterType
Definition: mpegts.c:64
AV_DICT_DONT_OVERWRITE
#define AV_DICT_DONT_OVERWRITE
Don't overwrite existing entries.
Definition: dict.h:74
StreamType
Definition: mpegts.c:784
AV_CODEC_ID_SMPTE_KLV
@ AV_CODEC_ID_SMPTE_KLV
Definition: codec_id.h:559
ff_mp4_read_descr
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:296
mpegts_open_section_filter
static MpegTSFilter * mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
Definition: mpegts.c:505
SLConfigDescr::packet_seq_num_len
int packet_seq_num_len
Definition: mpegts.h:188
mpegts_open_pes_filter
static MpegTSFilter * mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
Definition: mpegts.c:532
PESContext::ts
MpegTSContext * ts
Definition: mpegts.c:249
OEITS_END_TID
#define OEITS_END_TID
Definition: mpegts.h:100
init_MP4DescrParseContext
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
Definition: mpegts.c:1458
MAX_PES_HEADER_SIZE
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:243
MAX_PACKET_READAHEAD
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:3190
MAX_PIDS_PER_PROGRAM
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:116
MpegTSSectionFilter::end_of_section_reached
unsigned int end_of_section_reached
Definition: mpegts.c:92
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
parse_MP4ODescrTag
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1512
mpegts_push_data
static int mpegts_push_data(MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
Definition: mpegts.c:1134
SLConfigDescr::use_au_start
int use_au_start
Definition: mpegts.h:175
new_data_packet
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
Definition: mpegts.c:996
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:463
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
SDT_TID
#define SDT_TID
Definition: mpegts.h:87
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1165
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:425
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
SCTE_types
static const StreamType SCTE_types[]
Definition: mpegts.c:831
MPEGTS_PES
@ MPEGTS_PES
Definition: mpegts.c:65
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVMediaType
AVMediaType
Definition: avutil.h:199
MP4DescrParseContext::descr
Mp4Descr * descr
Definition: mpegts.c:1450
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:262
FFStream
Definition: internal.h:191
SectionHeader::tid
uint8_t tid
Definition: mpegts.c:642
reset_pes_packet_state
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:987
FFIOContext::pub
AVIOContext pub
Definition: avio_internal.h:30
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:427
Program
Definition: mpegts.c:117
MpegTSContext
Definition: mpegts.c:128
MpegTSFilter
Definition: mpegts.c:97
size
int size
Definition: twinvq_data.h:10344
MPEGTS_PAYLOAD
@ MPEGTS_PAYLOAD
Definition: mpegts.c:236
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
MpegTSContext::raw_packet_size
int raw_packet_size
raw packet size, including FEC if present
Definition: mpegts.c:133
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
finished_reading_packet
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
Definition: mpegts.c:2950
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
section
Definition: ffprobe.c:147
STREAM_ID_PRIVATE_STREAM_2
#define STREAM_ID_PRIVATE_STREAM_2
Definition: mpegts.h:146
SLConfigDescr::use_au_end
int use_au_end
Definition: mpegts.h:176
MpegTSSectionFilter::check_crc
unsigned int check_crc
Definition: mpegts.c:91
MpegTSContext::skip_clear
int skip_clear
Definition: mpegts.c:158
AVCodecParameters::profile
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: codec_par.h:120
mpegts_get_dts
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3324
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:483
mpegts_read_packet
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3239
parse_MP4ESDescrTag
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1526
buffer.h
AV_DISPOSITION_HEARING_IMPAIRED
#define AV_DISPOSITION_HEARING_IMPAIRED
stream for hearing impaired audiences
Definition: avformat.h:817
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
av_reallocp_array
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:232
ffio_ensure_seekback
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:1016
av_crc_get_table
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
SectionCallback
void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)
Definition: mpegts.c:80
mpeg.h
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
FFStream::pts_wrap_behavior
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: internal.h:350
PESContext::pid
int pid
Definition: mpegts.c:246
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
version
version
Definition: libkvazaar.c:307
FFStream::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: internal.h:399
handle_packet
static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
Definition: mpegts.c:2744
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
update_offsets
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
Definition: mpegts.c:1478
get_bits64
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:573
EIT_PID
#define EIT_PID
Definition: mpegts.h:45
is_pes_stream
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
Definition: mpegts.c:2293
FF_PROFILE_ARIB_PROFILE_A
#define FF_PROFILE_ARIB_PROFILE_A
Definition: avcodec.h:1640
SectionHeader
Definition: mpegts.c:641
ISO_639_LANGUAGE_DESCRIPTOR
#define ISO_639_LANGUAGE_DESCRIPTOR
Definition: mpegts.h:160
MP4DescrParseContext::pb
FFIOContext pb
Definition: mpegts.c:1449
log.h
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
avio_internal.h
IOD_DESCRIPTOR
#define IOD_DESCRIPTOR
Definition: mpegts.h:161
parse_stream_identifier_desc
static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
Definition: mpegts.c:2257
MAX_MP4_DESCR_COUNT
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:52
PESContext::data_index
int data_index
Definition: mpegts.c:255
internal.h
get_program
static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:271
PAT_TID
#define PAT_TID
Definition: mpegts.h:79
ff_mpegts_demuxer
const AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:3417
MpegTSContext::pids
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:175
PESContext::pes_header_size
int pes_header_size
Definition: mpegts.c:258
ffio_init_context
void ffio_init_context(FFIOContext *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:80
AV_CODEC_ID_CAVS
@ AV_CODEC_ID_CAVS
Definition: codec_id.h:137
get16
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:673
parse_section_header
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:755
MpegTSContext::epg_stream
AVStream * epg_stream
Definition: mpegts.c:178
common.h
AV_CODEC_ID_EPG
@ AV_CODEC_ID_EPG
Definition: codec_id.h:554
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:224
xf
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:664
mpegts_resync
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2882
MpegTSContext::crc_validity
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:173
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:278
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
PESContext::st
AVStream * st
Definition: mpegts.c:251
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:263
AVProgram
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1033
handle_packets
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2958
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:120
MpegTSContext::prg
struct Program * prg
Definition: mpegts.c:171
AV_DISPOSITION_DEPENDENT
#define AV_DISPOSITION_DEPENDENT
dependent audio stream (mix_type=0 in mpegts)
Definition: avformat.h:840
len
int len
Definition: vorbis_enc_data.h:426
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:138
AV_CRC_32_IEEE
@ AV_CRC_32_IEEE
Definition: crc.h:52
MpegTSPESFilter
Definition: mpegts.c:75
SLConfigDescr::au_len
int au_len
Definition: mpegts.h:184
MpegTSFilter::last_pcr
int64_t last_pcr
Definition: mpegts.c:101
MpegTSSectionFilter::last_crc
unsigned last_crc
Definition: mpegts.c:89
language
Undefined Behavior In the C language
Definition: undefined.txt:3
AVStream::disposition
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:904
mid_pred
#define mid_pred
Definition: mathops.h:97
AV_DISPOSITION_VISUAL_IMPAIRED
#define AV_DISPOSITION_VISUAL_IMPAIRED
stream for visual impaired audiences
Definition: avformat.h:818
MP4DescrParseContext
Definition: mpegts.c:1447
tag
uint32_t tag
Definition: movenc.c:1595
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:864
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:857
MpegTSSectionFilter::last_ver
int last_ver
Definition: mpegts.c:87
AVFormatContext::ts_id
int ts_id
Transport stream id.
Definition: avformat.h:1450
AV_PKT_DATA_DOVI_CONF
@ AV_PKT_DATA_DOVI_CONF
DOVI configuration ref: dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2....
Definition: packet.h:283
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
AVClass::class_name
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:71
Mp4Descr::dec_config_descr
uint8_t * dec_config_descr
Definition: mpegts.h:194
SLConfigDescr::use_timestamps
int use_timestamps
Definition: mpegts.h:179
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:758
mp4_read_od
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:1675
scte_data_cb
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1756
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
dovi_meta.h
m4sl_cb
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1691
dict.h
AV_DISPOSITION_DESCRIPTIONS
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:838
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
TS_MAX_PACKET_SIZE
#define TS_MAX_PACKET_SIZE
Definition: mpegts.h:30
M4OD_TID
#define M4OD_TID
Definition: mpegts.h:84
av_get_media_type_string
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:71
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:858
R8_CHECK_CLIP_MAX
#define R8_CHECK_CLIP_MAX(dst, maxv)
probe
static int probe(const AVProbeData *p)
Definition: act.c:37
mpegts_probe
static int mpegts_probe(const AVProbeData *p)
Definition: mpegts.c:3011
PESContext::PES_packet_length
int PES_packet_length
Definition: mpegts.c:257
AV_OPT_FLAG_EXPORT
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:285
clear_program
static void clear_program(struct Program *p)
Definition: mpegts.c:297
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
av_packet_new_side_data
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, size_t size)
Allocate new information of a packet.
Definition: avpacket.c:225
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
ff_reduce_index
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: seek.c:45
av_crc
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
FFStream::avctx
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:218
NB_PID_MAX
#define NB_PID_MAX
Definition: mpegts.h:32
AVDOVIDecoderConfigurationRecord::bl_present_flag
uint8_t bl_present_flag
Definition: dovi_meta.h:58
SL_DESCRIPTOR
#define SL_DESCRIPTOR
Definition: mpegts.h:162
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
PESContext::stream_id
uint8_t stream_id
Definition: mpegts.c:260
parse_MP4SLDescrTag
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1562
avpriv_mpegts_parse_open
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:3365
PESContext::buffer
AVBufferRef * buffer
Definition: mpegts.c:264
CHECK_COUNT
#define CHECK_COUNT
AVDOVIDecoderConfigurationRecord::rpu_present_flag
uint8_t rpu_present_flag
Definition: dovi_meta.h:56
mpegts_free
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:3269
HDMV_types
static const StreamType HDMV_types[]
Definition: mpegts.c:815
AVDOVIDecoderConfigurationRecord::el_present_flag
uint8_t el_present_flag
Definition: dovi_meta.h:57
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1146
AVPacket::stream_index
int stream_index
Definition: packet.h:375
AVPROBE_SCORE_STREAM_RETRY
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:454
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:333
SLConfigDescr::timestamp_res
int timestamp_res
Definition: mpegts.h:181
ISO_types
static const StreamType ISO_types[]
Definition: mpegts.c:790
AVDOVIDecoderConfigurationRecord::dv_version_minor
uint8_t dv_version_minor
Definition: dovi_meta.h:53
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
hex_dump_debug
#define hex_dump_debug(class, buf, size)
Definition: internal.h:41
read_sl_header
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:1050
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:469
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
MpegTSContext::pkt
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:153
mpegts_read_header
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:3089
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
MPEGTS_PCR
@ MPEGTS_PCR
Definition: mpegts.c:67
FFStream::request_probe
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:288
Program::id
unsigned int id
Definition: mpegts.c:118
STREAM_ID_ECM_STREAM
#define STREAM_ID_ECM_STREAM
Definition: mpegts.h:149
MpegTSSectionFilter::opaque
void * opaque
Definition: mpegts.c:94
PESContext::merged_st
int merged_st
Definition: mpegts.c:266
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
TS_FEC_PACKET_SIZE
#define TS_FEC_PACKET_SIZE
Definition: mpegts.h:27
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
MAX_STREAMS_PER_PROGRAM
#define MAX_STREAMS_PER_PROGRAM
Definition: mpegts.c:115
AVPacket
This structure stores compressed data.
Definition: packet.h:350
ff_read_frame_flush
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: seek.c:714
ff_find_stream_index
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:1226
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
STREAM_ID_PROGRAM_STREAM_DIRECTORY
#define STREAM_ID_PROGRAM_STREAM_DIRECTORY
Definition: mpegts.h:155
MpegTSFilter::last_cc
int last_cc
Definition: mpegts.c:100
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
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
MpegTSContext::scan_all_pmts
int scan_all_pmts
Definition: mpegts.c:161
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:393
MP4DescrParseContext::predefined_SLConfigDescriptor_seen
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1455
FFMAX3
#define FFMAX3(a, b, c)
Definition: macros.h:48
Stream
Definition: mpegts.c:110
d
d
Definition: ffmpeg_filter.c:156
MP4DescrParseContext::level
int level
Definition: mpegts.c:1454
bytestream.h
convert_header.str
string str
Definition: convert_header.py:20
FFStream::stream_identifier
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: internal.h:415
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:780
MpegTSContext::skip_unknown_pmt
int skip_unknown_pmt
Definition: mpegts.c:159
raw_options
static const AVOption raw_options[]
Definition: mpegts.c:211
FFStream::need_context_update
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:235
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
opus_channel_map
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1793
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
Program::pids
unsigned int pids[MAX_PIDS_PER_PROGRAM]
Definition: mpegts.c:120
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_CODEC_ID_AAC_LATM
@ AV_CODEC_ID_AAC_LATM
Definition: codec_id.h:472
ff_mpegtsraw_demuxer
const AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3430
parse_mp4_descr
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1605
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AV_CODEC_ID_HDMV_TEXT_SUBTITLE
@ AV_CODEC_ID_HDMV_TEXT_SUBTITLE
Definition: codec_id.h:545
TS_PACKET_SIZE
#define TS_PACKET_SIZE
Definition: mpegts.h:29
MpegTSSectionFilter::section_cb
SectionCallback * section_cb
Definition: mpegts.c:93
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
PROBE_PACKET_MARGIN
#define PROBE_PACKET_MARGIN
Definition: mpegts.c:62
h
h
Definition: vp9dsp_template.c:2038
read_timestamp
static int64_t read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
Definition: seek.c:273
get_ts64
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:1043
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:890
get_packet_size
static int get_packet_size(AVFormatContext *s)
Definition: mpegts.c:603
analyze
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:574
write_section_data
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
read_packet
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2925
MpegTSContext::mpeg2ts_compute_pcr
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:141
REGD_types
static const StreamType REGD_types[]
Definition: mpegts.c:852
MISC_types
static const StreamType MISC_types[]
Definition: mpegts.c:837
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:52
add_program
static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:312
options
static const AVOption options[]
Definition: mpegts.c:185
snprintf
#define snprintf
Definition: snprintf.h:34
PESContext::ts_packet_pos
int64_t ts_packet_pos
position of first TS packet of this PES packet
Definition: mpegts.c:262
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
AVProgram::pcr_pid
int pcr_pid
Definition: avformat.h:1043
FFStream::pts_wrap_reference
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:338
Mp4Descr
Definition: mpegts.h:191
SLConfigDescr
Definition: mpegts.h:174
avio_read_partial
int avio_read_partial(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:696
sdt_cb
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2656
MpegTSContext::fix_teletext_pts
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:144
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98
ff_alloc_extradata
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:451
AVDOVIDecoderConfigurationRecord
Definition: dovi_meta.h:51
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:360
av_program_add_stream_index
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
AV_CODEC_ID_SCTE_35
@ AV_CODEC_ID_SCTE_35
Contain timestamp estimated through PCR of program stream.
Definition: codec_id.h:553
StreamType::codec_type
enum AVMediaType codec_type
Definition: mpegts.c:786