FFmpeg
mpegts.c
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1 /*
2  * MPEG-2 transport stream (aka DVB) demuxer
3  * Copyright (c) 2002-2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config_components.h"
23 
24 #include "libavutil/buffer.h"
25 #include "libavutil/common.h"
26 #include "libavutil/crc.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/log.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/avcodec.h"
36 #include "libavcodec/bytestream.h"
37 #include "libavcodec/defs.h"
38 #include "libavcodec/get_bits.h"
39 #include "libavcodec/opus.h"
40 #include "avformat.h"
41 #include "mpegts.h"
42 #include "internal.h"
43 #include "avio_internal.h"
44 #include "demux.h"
45 #include "mpeg.h"
46 #include "isom.h"
47 #if CONFIG_ICONV
48 #include <iconv.h>
49 #endif
50 
51 /* maximum size in which we look for synchronization if
52  * synchronization is lost */
53 #define MAX_RESYNC_SIZE 65536
54 
55 #define MAX_MP4_DESCR_COUNT 16
56 
57 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
58  do { \
59  if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
60  (modulus) = (dividend) % (divisor); \
61  (prev_dividend) = (dividend); \
62  } while (0)
63 
64 #define PROBE_PACKET_MAX_BUF 8192
65 #define PROBE_PACKET_MARGIN 5
66 
71 };
72 
73 typedef struct MpegTSFilter MpegTSFilter;
74 
75 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
76  int is_start, int64_t pos);
77 
78 typedef struct MpegTSPESFilter {
80  void *opaque;
82 
83 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
84 
85 typedef void SetServiceCallback (void *opaque, int ret);
86 
87 typedef struct MpegTSSectionFilter {
90  int last_ver;
91  unsigned crc;
92  unsigned last_crc;
93  uint8_t *section_buf;
94  unsigned int check_crc : 1;
95  unsigned int end_of_section_reached : 1;
97  void *opaque;
99 
100 struct MpegTSFilter {
101  int pid;
102  int es_id;
103  int last_cc; /* last cc code (-1 if first packet) */
104  int64_t last_pcr;
105  int discard;
107  union {
110  } u;
111 };
112 
113 struct Stream {
114  int idx;
116 };
117 
118 #define MAX_STREAMS_PER_PROGRAM 128
119 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
120 struct Program {
121  unsigned int id; // program id/service id
122  unsigned int nb_pids;
123  unsigned int pids[MAX_PIDS_PER_PROGRAM];
124  unsigned int nb_streams;
126 
127  /** have we found pmt for this program */
129 };
130 
132  const AVClass *class;
133  /* user data */
135  /** raw packet size, including FEC if present */
137 
138  int64_t pos47_full;
139 
140  /** if true, all pids are analyzed to find streams */
142 
143  /** compute exact PCR for each transport stream packet */
145 
146  /** fix dvb teletext pts */
148 
149  int64_t cur_pcr; /**< used to estimate the exact PCR */
150  int64_t pcr_incr; /**< used to estimate the exact PCR */
151 
152  /* data needed to handle file based ts */
153  /** stop parsing loop */
155  /** packet containing Audio/Video data */
157  /** to detect seek */
158  int64_t last_pos;
159 
163 
165 
169 
170  /******************************************/
171  /* private mpegts data */
172  /* scan context */
173  /** structure to keep track of Program->pids mapping */
174  unsigned int nb_prg;
175  struct Program *prg;
176 
178  /** filters for various streams specified by PMT + for the PAT and PMT */
181 
184 };
185 
186 #define MPEGTS_OPTIONS \
187  { "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 }
188 
189 static const AVOption options[] = {
191  {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
192  {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193  {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
195  {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
196  {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
197  {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
198  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
199  {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
200  {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
201  {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
202  {.i64 = 0}, 0, 1, 0 },
203  {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
204  {.i64 = 0}, 0, 1, 0 },
205  {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
206  {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
207  { NULL },
208 };
209 
210 static const AVClass mpegts_class = {
211  .class_name = "mpegts demuxer",
212  .item_name = av_default_item_name,
213  .option = options,
214  .version = LIBAVUTIL_VERSION_INT,
215 };
216 
217 static const AVOption raw_options[] = {
219  { "compute_pcr", "compute exact PCR for each transport stream packet",
220  offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
221  { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
222  { "ts_packetsize", "output option carrying the raw packet size",
223  offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
224  { .i64 = 0 }, 0, 0,
226  { NULL },
227 };
228 
229 static const AVClass mpegtsraw_class = {
230  .class_name = "mpegtsraw demuxer",
231  .item_name = av_default_item_name,
232  .option = raw_options,
233  .version = LIBAVUTIL_VERSION_INT,
234 };
235 
236 /* TS stream handling */
237 
244 };
245 
246 /* enough for PES header + length */
247 #define PES_START_SIZE 6
248 #define PES_HEADER_SIZE 9
249 #define MAX_PES_HEADER_SIZE (9 + 255)
250 
251 typedef struct PESContext {
252  int pid;
253  int pcr_pid; /**< if -1 then all packets containing PCR are considered */
258  AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
260  /* used to get the format */
262  int flags; /**< copied to the AVPacket flags */
266  uint8_t stream_id;
267  int64_t pts, dts;
268  int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
273 } PESContext;
274 
275 extern const AVInputFormat ff_mpegts_demuxer;
276 
277 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
278 {
279  int i;
280  for (i = 0; i < ts->nb_prg; i++) {
281  if (ts->prg[i].id == programid) {
282  return &ts->prg[i];
283  }
284  }
285  return NULL;
286 }
287 
288 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
289 {
290  AVProgram *prg = NULL;
291  int i;
292 
293  for (i = 0; i < ts->stream->nb_programs; i++)
294  if (ts->stream->programs[i]->id == programid) {
295  prg = ts->stream->programs[i];
296  break;
297  }
298  if (!prg)
299  return;
300  prg->nb_stream_indexes = 0;
301 }
302 
303 static void clear_program(struct Program *p)
304 {
305  if (!p)
306  return;
307  p->nb_pids = 0;
308  p->nb_streams = 0;
309  p->pmt_found = 0;
310 }
311 
313 {
314  av_freep(&ts->prg);
315  ts->nb_prg = 0;
316 }
317 
318 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
319 {
320  struct Program *p = get_program(ts, programid);
321  if (p)
322  return p;
323  if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
324  ts->nb_prg = 0;
325  return NULL;
326  }
327  p = &ts->prg[ts->nb_prg];
328  p->id = programid;
329  clear_program(p);
330  ts->nb_prg++;
331  return p;
332 }
333 
334 static void add_pid_to_program(struct Program *p, unsigned int pid)
335 {
336  int i;
337  if (!p)
338  return;
339 
340  if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
341  return;
342 
343  for (i = 0; i < p->nb_pids; i++)
344  if (p->pids[i] == pid)
345  return;
346 
347  p->pids[p->nb_pids++] = pid;
348 }
349 
350 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
351  unsigned int pid, int version)
352 {
353  int i;
354  for (i = 0; i < s->nb_programs; i++) {
355  AVProgram *program = s->programs[i];
356  if (program->id == programid) {
357  int old_pcr_pid = program->pcr_pid,
358  old_version = program->pmt_version;
359  program->pcr_pid = pid;
360  program->pmt_version = version;
361 
362  if (old_version != -1 && old_version != version) {
364  "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
365  programid, old_version, version, old_pcr_pid, pid);
366  }
367  break;
368  }
369  }
370 }
371 
372 /**
373  * @brief discard_pid() decides if the pid is to be discarded according
374  * to caller's programs selection
375  * @param ts : - TS context
376  * @param pid : - pid
377  * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
378  * 0 otherwise
379  */
380 static int discard_pid(MpegTSContext *ts, unsigned int pid)
381 {
382  int i, j, k;
383  int used = 0, discarded = 0;
384  struct Program *p;
385 
386  if (pid == PAT_PID)
387  return 0;
388 
389  /* If none of the programs have .discard=AVDISCARD_ALL then there's
390  * no way we have to discard this packet */
391  for (k = 0; k < ts->stream->nb_programs; k++)
392  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
393  break;
394  if (k == ts->stream->nb_programs)
395  return 0;
396 
397  for (i = 0; i < ts->nb_prg; i++) {
398  p = &ts->prg[i];
399  for (j = 0; j < p->nb_pids; j++) {
400  if (p->pids[j] != pid)
401  continue;
402  // is program with id p->id set to be discarded?
403  for (k = 0; k < ts->stream->nb_programs; k++) {
404  if (ts->stream->programs[k]->id == p->id) {
405  if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
406  discarded++;
407  else
408  used++;
409  }
410  }
411  }
412  }
413 
414  return !used && discarded;
415 }
416 
417 /**
418  * Assemble PES packets out of TS packets, and then call the "section_cb"
419  * function when they are complete.
420  */
422  const uint8_t *buf, int buf_size, int is_start)
423 {
424  MpegTSSectionFilter *tss = &tss1->u.section_filter;
425  uint8_t *cur_section_buf = NULL;
426  int len, offset;
427 
428  if (is_start) {
429  memcpy(tss->section_buf, buf, buf_size);
430  tss->section_index = buf_size;
431  tss->section_h_size = -1;
432  tss->end_of_section_reached = 0;
433  } else {
434  if (tss->end_of_section_reached)
435  return;
437  if (buf_size < len)
438  len = buf_size;
439  memcpy(tss->section_buf + tss->section_index, buf, len);
440  tss->section_index += len;
441  }
442 
443  offset = 0;
444  cur_section_buf = tss->section_buf;
445  while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
446  /* compute section length if possible */
447  if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
448  len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
449  if (len > MAX_SECTION_SIZE)
450  return;
451  tss->section_h_size = len;
452  }
453 
454  if (tss->section_h_size != -1 &&
455  tss->section_index >= offset + tss->section_h_size) {
456  int crc_valid = 1;
457  tss->end_of_section_reached = 1;
458 
459  if (tss->check_crc) {
460  crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
461  if (tss->section_h_size >= 4)
462  tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
463 
464  if (crc_valid) {
465  ts->crc_validity[ tss1->pid ] = 100;
466  }else if (ts->crc_validity[ tss1->pid ] > -10) {
467  ts->crc_validity[ tss1->pid ]--;
468  }else
469  crc_valid = 2;
470  }
471  if (crc_valid) {
472  tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
473  if (crc_valid != 1)
474  tss->last_ver = -1;
475  }
476 
477  cur_section_buf += tss->section_h_size;
478  offset += tss->section_h_size;
479  tss->section_h_size = -1;
480  } else {
481  tss->section_h_size = -1;
482  tss->end_of_section_reached = 0;
483  break;
484  }
485  }
486 }
487 
488 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
489  enum MpegTSFilterType type)
490 {
492 
493  av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
494 
495  if (pid >= NB_PID_MAX || ts->pids[pid])
496  return NULL;
497  filter = av_mallocz(sizeof(MpegTSFilter));
498  if (!filter)
499  return NULL;
500  ts->pids[pid] = filter;
501 
502  filter->type = type;
503  filter->pid = pid;
504  filter->es_id = -1;
505  filter->last_cc = -1;
506  filter->last_pcr= -1;
507 
508  return filter;
509 }
510 
512  unsigned int pid,
513  SectionCallback *section_cb,
514  void *opaque,
515  int check_crc)
516 {
518  MpegTSSectionFilter *sec;
519  uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
520 
521  if (!section_buf)
522  return NULL;
523 
524  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
525  av_free(section_buf);
526  return NULL;
527  }
528  sec = &filter->u.section_filter;
529  sec->section_cb = section_cb;
530  sec->opaque = opaque;
531  sec->section_buf = section_buf;
532  sec->check_crc = check_crc;
533  sec->last_ver = -1;
534 
535  return filter;
536 }
537 
538 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
539  PESCallback *pes_cb,
540  void *opaque)
541 {
543  MpegTSPESFilter *pes;
544 
545  if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
546  return NULL;
547 
548  pes = &filter->u.pes_filter;
549  pes->pes_cb = pes_cb;
550  pes->opaque = opaque;
551  return filter;
552 }
553 
554 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
555 {
556  return mpegts_open_filter(ts, pid, MPEGTS_PCR);
557 }
558 
560 {
561  int pid;
562 
563  pid = filter->pid;
564  if (filter->type == MPEGTS_SECTION)
565  av_freep(&filter->u.section_filter.section_buf);
566  else if (filter->type == MPEGTS_PES) {
567  PESContext *pes = filter->u.pes_filter.opaque;
568  av_buffer_unref(&pes->buffer);
569  /* referenced private data will be freed later in
570  * avformat_close_input (pes->st->priv_data == pes) */
571  if (!pes->st || pes->merged_st) {
572  av_freep(&filter->u.pes_filter.opaque);
573  }
574  }
575 
576  av_free(filter);
577  ts->pids[pid] = NULL;
578 }
579 
580 static int analyze(const uint8_t *buf, int size, int packet_size,
581  int probe)
582 {
583  int stat[TS_MAX_PACKET_SIZE];
584  int stat_all = 0;
585  int i;
586  int best_score = 0;
587 
588  memset(stat, 0, packet_size * sizeof(*stat));
589 
590  for (i = 0; i < size - 3; i++) {
591  if (buf[i] == 0x47) {
592  int pid = AV_RB16(buf+1) & 0x1FFF;
593  int asc = buf[i + 3] & 0x30;
594  if (!probe || pid == 0x1FFF || asc) {
595  int x = i % packet_size;
596  stat[x]++;
597  stat_all++;
598  if (stat[x] > best_score) {
599  best_score = stat[x];
600  }
601  }
602  }
603  }
604 
605  return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
606 }
607 
608 /* autodetect fec presence */
610 {
611  int score, fec_score, dvhs_score;
612  int margin;
613  int ret;
614 
615  /*init buffer to store stream for probing */
616  uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
617  int buf_size = 0;
618  int max_iterations = 16;
619 
620  while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
621  ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
622  if (ret < 0)
623  return AVERROR_INVALIDDATA;
624  buf_size += ret;
625 
626  score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
627  dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
628  fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
629  av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
630  buf_size, score, dvhs_score, fec_score);
631 
632  margin = mid_pred(score, fec_score, dvhs_score);
633 
634  if (buf_size < PROBE_PACKET_MAX_BUF)
635  margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
636 
637  if (score > margin)
638  return TS_PACKET_SIZE;
639  else if (dvhs_score > margin)
640  return TS_DVHS_PACKET_SIZE;
641  else if (fec_score > margin)
642  return TS_FEC_PACKET_SIZE;
643  }
644  return AVERROR_INVALIDDATA;
645 }
646 
647 typedef struct SectionHeader {
648  uint8_t tid;
649  uint16_t id;
650  uint8_t version;
651  uint8_t current_next;
652  uint8_t sec_num;
653  uint8_t last_sec_num;
654 } SectionHeader;
655 
657 {
658  if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
659  return 1;
660 
661  tssf->last_ver = h->version;
662  tssf->last_crc = tssf->crc;
663 
664  return 0;
665 }
666 
667 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
668 {
669  const uint8_t *p;
670  int c;
671 
672  p = *pp;
673  if (p >= p_end)
674  return AVERROR_INVALIDDATA;
675  c = *p++;
676  *pp = p;
677  return c;
678 }
679 
680 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
681 {
682  const uint8_t *p;
683  int c;
684 
685  p = *pp;
686  if (1 >= p_end - p)
687  return AVERROR_INVALIDDATA;
688  c = AV_RB16(p);
689  p += 2;
690  *pp = p;
691  return c;
692 }
693 
694 /* read and allocate a DVB string preceded by its length */
695 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
696 {
697  int len;
698  const uint8_t *p;
699  char *str;
700 
701  p = *pp;
702  len = get8(&p, p_end);
703  if (len < 0)
704  return NULL;
705  if (len > p_end - p)
706  return NULL;
707 #if CONFIG_ICONV
708  if (len) {
709  const char *encodings[] = {
710  "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
711  "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
712  "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
713  "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
714  "", "", "", "", "", "", "", ""
715  };
716  iconv_t cd;
717  char *in, *out;
718  size_t inlen = len, outlen = inlen * 6 + 1;
719  if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
720  char iso8859[12];
721  snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
722  inlen -= 3;
723  in = (char *)p + 3;
724  cd = iconv_open("UTF-8", iso8859);
725  } else if (p[0] < 0x20) {
726  inlen -= 1;
727  in = (char *)p + 1;
728  cd = iconv_open("UTF-8", encodings[*p]);
729  } else {
730  in = (char *)p;
731  cd = iconv_open("UTF-8", encodings[0]);
732  }
733  if (cd == (iconv_t)-1)
734  goto no_iconv;
735  str = out = av_malloc(outlen);
736  if (!str) {
737  iconv_close(cd);
738  return NULL;
739  }
740  if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
741  iconv_close(cd);
742  av_freep(&str);
743  goto no_iconv;
744  }
745  iconv_close(cd);
746  *out = 0;
747  *pp = p + len;
748  return str;
749  }
750 no_iconv:
751 #endif
752  str = av_malloc(len + 1);
753  if (!str)
754  return NULL;
755  memcpy(str, p, len);
756  str[len] = '\0';
757  p += len;
758  *pp = p;
759  return str;
760 }
761 
763  const uint8_t **pp, const uint8_t *p_end)
764 {
765  int val;
766 
767  val = get8(pp, p_end);
768  if (val < 0)
769  return val;
770  h->tid = val;
771  *pp += 2;
772  val = get16(pp, p_end);
773  if (val < 0)
774  return val;
775  h->id = val;
776  val = get8(pp, p_end);
777  if (val < 0)
778  return val;
779  h->version = (val >> 1) & 0x1f;
780  h->current_next = val & 0x01;
781  val = get8(pp, p_end);
782  if (val < 0)
783  return val;
784  h->sec_num = val;
785  val = get8(pp, p_end);
786  if (val < 0)
787  return val;
788  h->last_sec_num = val;
789  return 0;
790 }
791 
792 typedef struct StreamType {
793  uint32_t stream_type;
796 } StreamType;
797 
798 static const StreamType ISO_types[] = {
805  /* Makito encoder sets stream type 0x11 for AAC,
806  * so auto-detect LOAS/LATM instead of hardcoding it. */
807 #if !CONFIG_LOAS_DEMUXER
808  { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
809 #endif
820  { 0 },
821 };
822 
823 static const StreamType HDMV_types[] = {
829  { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
830  { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
831  { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
832  { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
835  { 0 },
836 };
837 
838 /* SCTE types */
839 static const StreamType SCTE_types[] = {
841  { 0 },
842 };
843 
844 /* ATSC ? */
845 static const StreamType MISC_types[] = {
848  { 0 },
849 };
850 
851 /* HLS Sample Encryption Types */
857  { 0 },
858 };
859 
860 static const StreamType REGD_types[] = {
861  { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
862  { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
863  { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
864  { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
865  { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
866  { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
867  { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
868  { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
869  { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
870  { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
871  { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
872  { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
873  { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
874  { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
875  { 0 },
876 };
877 
878 static const StreamType METADATA_types[] = {
879  { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
880  { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
881  { 0 },
882 };
883 
884 /* descriptor present */
885 static const StreamType DESC_types[] = {
886  { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
887  { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
890  { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
891  { 0 },
892 };
893 
895  uint32_t stream_type,
896  const StreamType *types)
897 {
898  FFStream *const sti = ffstream(st);
899  for (; types->stream_type; types++)
900  if (stream_type == types->stream_type) {
901  if (st->codecpar->codec_type != types->codec_type ||
902  st->codecpar->codec_id != types->codec_id) {
903  st->codecpar->codec_type = types->codec_type;
904  st->codecpar->codec_id = types->codec_id;
905  sti->need_context_update = 1;
906  }
907  sti->request_probe = 0;
908  return;
909  }
910 }
911 
913  uint32_t stream_type, uint32_t prog_reg_desc)
914 {
915  FFStream *const sti = ffstream(st);
916  int old_codec_type = st->codecpar->codec_type;
917  int old_codec_id = st->codecpar->codec_id;
918  int old_codec_tag = st->codecpar->codec_tag;
919 
920  if (avcodec_is_open(sti->avctx)) {
921  av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
922  return 0;
923  }
924 
925  avpriv_set_pts_info(st, 33, 1, 90000);
926  st->priv_data = pes;
930  pes->st = st;
931  pes->stream_type = stream_type;
932 
933  av_log(pes->stream, AV_LOG_DEBUG,
934  "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
935  st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
936 
937  st->codecpar->codec_tag = pes->stream_type;
938 
940  if (pes->stream_type == 4 || pes->stream_type == 0x0f)
941  sti->request_probe = 50;
942  if ((prog_reg_desc == AV_RL32("HDMV") ||
943  prog_reg_desc == AV_RL32("HDPR")) &&
946  if (pes->stream_type == 0x83) {
947  // HDMV TrueHD streams also contain an AC3 coded version of the
948  // audio track - add a second stream for this
949  AVStream *sub_st;
950  // priv_data cannot be shared between streams
951  PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
952  if (!sub_pes)
953  return AVERROR(ENOMEM);
954 
955  sub_st = avformat_new_stream(pes->stream, NULL);
956  if (!sub_st) {
957  av_free(sub_pes);
958  return AVERROR(ENOMEM);
959  }
960 
961  sub_st->id = pes->pid;
962  avpriv_set_pts_info(sub_st, 33, 1, 90000);
963  sub_st->priv_data = sub_pes;
965  sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
967  sub_pes->sub_st = pes->sub_st = sub_st;
968  }
969  }
970  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
972  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
974  if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
975  st->codecpar->codec_id = old_codec_id;
976  st->codecpar->codec_type = old_codec_type;
977  }
978  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
979  (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
980  sti->probe_packets > 0 &&
981  stream_type == STREAM_TYPE_PRIVATE_DATA) {
985  }
986 
987  /* queue a context update if properties changed */
988  if (old_codec_type != st->codecpar->codec_type ||
989  old_codec_id != st->codecpar->codec_id ||
990  old_codec_tag != st->codecpar->codec_tag)
991  sti->need_context_update = 1;
992 
993  return 0;
994 }
995 
997 {
998  pes->pts = AV_NOPTS_VALUE;
999  pes->dts = AV_NOPTS_VALUE;
1000  pes->data_index = 0;
1001  pes->flags = 0;
1002  av_buffer_unref(&pes->buffer);
1003 }
1004 
1005 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1006 {
1008  pkt->data = (uint8_t *)buffer;
1009  pkt->size = len;
1010 }
1011 
1013 {
1014  uint8_t *sd;
1015 
1017 
1018  pkt->buf = pes->buffer;
1019  pkt->data = pes->buffer->data;
1020  pkt->size = pes->data_index;
1021 
1022  if (pes->PES_packet_length &&
1023  pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1024  PES_START_SIZE) {
1025  av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1026  pes->flags |= AV_PKT_FLAG_CORRUPT;
1027  }
1028  memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1029 
1030  // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1031  if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1032  pkt->stream_index = pes->sub_st->index;
1033  else
1034  pkt->stream_index = pes->st->index;
1035  pkt->pts = pes->pts;
1036  pkt->dts = pes->dts;
1037  /* store position of first TS packet of this PES packet */
1038  pkt->pos = pes->ts_packet_pos;
1039  pkt->flags = pes->flags;
1040 
1041  pes->buffer = NULL;
1043 
1045  if (!sd)
1046  return AVERROR(ENOMEM);
1047  *sd = pes->stream_id;
1048 
1049  return 0;
1050 }
1051 
1052 static uint64_t get_ts64(GetBitContext *gb, int bits)
1053 {
1054  if (get_bits_left(gb) < bits)
1055  return AV_NOPTS_VALUE;
1056  return get_bits64(gb, bits);
1057 }
1058 
1060  const uint8_t *buf, int buf_size)
1061 {
1062  GetBitContext gb;
1063  int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1064  int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1065  int dts_flag = -1, cts_flag = -1;
1066  int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1067  uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1068  int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1069 
1070  memcpy(buf_padded, buf, buf_padded_size);
1071 
1072  init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1073 
1074  if (sl->use_au_start)
1075  au_start_flag = get_bits1(&gb);
1076  if (sl->use_au_end)
1077  au_end_flag = get_bits1(&gb);
1078  if (!sl->use_au_start && !sl->use_au_end)
1079  au_start_flag = au_end_flag = 1;
1080  if (sl->ocr_len > 0)
1081  ocr_flag = get_bits1(&gb);
1082  if (sl->use_idle)
1083  idle_flag = get_bits1(&gb);
1084  if (sl->use_padding)
1085  padding_flag = get_bits1(&gb);
1086  if (padding_flag)
1087  padding_bits = get_bits(&gb, 3);
1088 
1089  if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1090  if (sl->packet_seq_num_len)
1092  if (sl->degr_prior_len)
1093  if (get_bits1(&gb))
1094  skip_bits(&gb, sl->degr_prior_len);
1095  if (ocr_flag)
1096  skip_bits_long(&gb, sl->ocr_len);
1097  if (au_start_flag) {
1098  if (sl->use_rand_acc_pt)
1099  get_bits1(&gb);
1100  if (sl->au_seq_num_len > 0)
1101  skip_bits_long(&gb, sl->au_seq_num_len);
1102  if (sl->use_timestamps) {
1103  dts_flag = get_bits1(&gb);
1104  cts_flag = get_bits1(&gb);
1105  }
1106  }
1107  if (sl->inst_bitrate_len)
1108  inst_bitrate_flag = get_bits1(&gb);
1109  if (dts_flag == 1)
1110  dts = get_ts64(&gb, sl->timestamp_len);
1111  if (cts_flag == 1)
1112  cts = get_ts64(&gb, sl->timestamp_len);
1113  if (sl->au_len > 0)
1114  skip_bits_long(&gb, sl->au_len);
1115  if (inst_bitrate_flag)
1116  skip_bits_long(&gb, sl->inst_bitrate_len);
1117  }
1118 
1119  if (dts != AV_NOPTS_VALUE)
1120  pes->dts = dts;
1121  if (cts != AV_NOPTS_VALUE)
1122  pes->pts = cts;
1123 
1124  if (sl->timestamp_len && sl->timestamp_res)
1126 
1127  return (get_bits_count(&gb) + 7) >> 3;
1128 }
1129 
1131 {
1133  if (!ts->pools[index]) {
1134  int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1135  ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1136  if (!ts->pools[index])
1137  return NULL;
1138  }
1139  return av_buffer_pool_get(ts->pools[index]);
1140 }
1141 
1142 /* return non zero if a packet could be constructed */
1144  const uint8_t *buf, int buf_size, int is_start,
1145  int64_t pos)
1146 {
1147  PESContext *pes = filter->u.pes_filter.opaque;
1148  MpegTSContext *ts = pes->ts;
1149  const uint8_t *p;
1150  int ret, len;
1151 
1152  if (!ts->pkt)
1153  return 0;
1154 
1155  if (is_start) {
1156  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1157  ret = new_pes_packet(pes, ts->pkt);
1158  if (ret < 0)
1159  return ret;
1160  ts->stop_parse = 1;
1161  } else {
1163  }
1164  pes->state = MPEGTS_HEADER;
1165  pes->ts_packet_pos = pos;
1166  }
1167  p = buf;
1168  while (buf_size > 0) {
1169  switch (pes->state) {
1170  case MPEGTS_HEADER:
1171  len = PES_START_SIZE - pes->data_index;
1172  if (len > buf_size)
1173  len = buf_size;
1174  memcpy(pes->header + pes->data_index, p, len);
1175  pes->data_index += len;
1176  p += len;
1177  buf_size -= len;
1178  if (pes->data_index == PES_START_SIZE) {
1179  /* we got all the PES or section header. We can now
1180  * decide */
1181  if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1182  pes->header[2] == 0x01) {
1183  /* it must be an MPEG-2 PES stream */
1184  pes->stream_id = pes->header[3];
1185  av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1186 
1187  if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1188  (!pes->sub_st ||
1189  pes->sub_st->discard == AVDISCARD_ALL)) ||
1191  goto skip;
1192 
1193  /* stream not present in PMT */
1194  if (!pes->st) {
1195  if (ts->skip_changes)
1196  goto skip;
1197  if (ts->merge_pmt_versions)
1198  goto skip; /* wait for PMT to merge new stream */
1199 
1200  pes->st = avformat_new_stream(ts->stream, NULL);
1201  if (!pes->st)
1202  return AVERROR(ENOMEM);
1203  pes->st->id = pes->pid;
1204  mpegts_set_stream_info(pes->st, pes, 0, 0);
1205  }
1206 
1207  pes->PES_packet_length = AV_RB16(pes->header + 4);
1208  /* NOTE: zero length means the PES size is unbounded */
1209 
1212  pes->stream_id != STREAM_ID_ECM_STREAM &&
1213  pes->stream_id != STREAM_ID_EMM_STREAM &&
1217  FFStream *const pes_sti = ffstream(pes->st);
1218  pes->state = MPEGTS_PESHEADER;
1219  if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1220  av_log(pes->stream, AV_LOG_TRACE,
1221  "pid=%x stream_type=%x probing\n",
1222  pes->pid,
1223  pes->stream_type);
1224  pes_sti->request_probe = 1;
1225  }
1226  } else {
1227  pes->pes_header_size = 6;
1228  pes->state = MPEGTS_PAYLOAD;
1229  pes->data_index = 0;
1230  }
1231  } else {
1232  /* otherwise, it should be a table */
1233  /* skip packet */
1234 skip:
1235  pes->state = MPEGTS_SKIP;
1236  continue;
1237  }
1238  }
1239  break;
1240  /**********************************************/
1241  /* PES packing parsing */
1242  case MPEGTS_PESHEADER:
1243  len = PES_HEADER_SIZE - pes->data_index;
1244  if (len < 0)
1245  return AVERROR_INVALIDDATA;
1246  if (len > buf_size)
1247  len = buf_size;
1248  memcpy(pes->header + pes->data_index, p, len);
1249  pes->data_index += len;
1250  p += len;
1251  buf_size -= len;
1252  if (pes->data_index == PES_HEADER_SIZE) {
1253  pes->pes_header_size = pes->header[8] + 9;
1255  }
1256  break;
1257  case MPEGTS_PESHEADER_FILL:
1258  len = pes->pes_header_size - pes->data_index;
1259  if (len < 0)
1260  return AVERROR_INVALIDDATA;
1261  if (len > buf_size)
1262  len = buf_size;
1263  memcpy(pes->header + pes->data_index, p, len);
1264  pes->data_index += len;
1265  p += len;
1266  buf_size -= len;
1267  if (pes->data_index == pes->pes_header_size) {
1268  const uint8_t *r;
1269  unsigned int flags, pes_ext, skip;
1270 
1271  flags = pes->header[7];
1272  r = pes->header + 9;
1273  pes->pts = AV_NOPTS_VALUE;
1274  pes->dts = AV_NOPTS_VALUE;
1275  if ((flags & 0xc0) == 0x80) {
1276  pes->dts = pes->pts = ff_parse_pes_pts(r);
1277  r += 5;
1278  } else if ((flags & 0xc0) == 0xc0) {
1279  pes->pts = ff_parse_pes_pts(r);
1280  r += 5;
1281  pes->dts = ff_parse_pes_pts(r);
1282  r += 5;
1283  }
1284  pes->extended_stream_id = -1;
1285  if (flags & 0x01) { /* PES extension */
1286  pes_ext = *r++;
1287  /* Skip PES private data, program packet sequence counter and P-STD buffer */
1288  skip = (pes_ext >> 4) & 0xb;
1289  skip += skip & 0x9;
1290  r += skip;
1291  if ((pes_ext & 0x41) == 0x01 &&
1292  (r + 2) <= (pes->header + pes->pes_header_size)) {
1293  /* PES extension 2 */
1294  if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1295  pes->extended_stream_id = r[1];
1296  }
1297  }
1298 
1299  /* we got the full header. We parse it and get the payload */
1300  pes->state = MPEGTS_PAYLOAD;
1301  pes->data_index = 0;
1302  if (pes->stream_type == 0x12 && buf_size > 0) {
1303  int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1304  buf_size);
1305  pes->pes_header_size += sl_header_bytes;
1306  p += sl_header_bytes;
1307  buf_size -= sl_header_bytes;
1308  }
1309  if (pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV && buf_size >= 5) {
1310  /* skip metadata access unit header */
1311  pes->pes_header_size += 5;
1312  p += 5;
1313  buf_size -= 5;
1314  }
1315  if ( pes->ts->fix_teletext_pts
1318  ) {
1319  AVProgram *p = NULL;
1320  int pcr_found = 0;
1321  while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1322  if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1323  MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1324  if (f) {
1325  AVStream *st = NULL;
1326  if (f->type == MPEGTS_PES) {
1327  PESContext *pcrpes = f->u.pes_filter.opaque;
1328  if (pcrpes)
1329  st = pcrpes->st;
1330  } else if (f->type == MPEGTS_PCR) {
1331  int i;
1332  for (i = 0; i < p->nb_stream_indexes; i++) {
1333  AVStream *pst = pes->stream->streams[p->stream_index[i]];
1334  if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1335  st = pst;
1336  }
1337  }
1338  if (f->last_pcr != -1 && !f->discard) {
1339  // teletext packets do not always have correct timestamps,
1340  // the standard says they should be handled after 40.6 ms at most,
1341  // and the pcr error to this packet should be no more than 100 ms.
1342  // TODO: we should interpolate the PCR, not just use the last one
1343  int64_t pcr = f->last_pcr / 300;
1344  pcr_found = 1;
1345  if (st) {
1346  const FFStream *const sti = ffstream(st);
1347  FFStream *const pes_sti = ffstream(pes->st);
1348 
1349  pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1350  pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1351  }
1352  if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1353  pes->pts = pes->dts = pcr;
1354  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1355  pes->dts > pcr + 3654 + 9000) {
1356  pes->pts = pes->dts = pcr + 3654 + 9000;
1357  } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1358  pes->dts > pcr + 10*90000) { //10sec
1359  pes->pts = pes->dts = pcr + 3654 + 9000;
1360  }
1361  break;
1362  }
1363  }
1364  }
1365  }
1366 
1367  if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1368  !pcr_found) {
1370  "Forcing DTS/PTS to be unset for a "
1371  "non-trustworthy PES packet for PID %d as "
1372  "PCR hasn't been received yet.\n",
1373  pes->pid);
1374  pes->dts = pes->pts = AV_NOPTS_VALUE;
1375  }
1376  }
1377  }
1378  break;
1379  case MPEGTS_PAYLOAD:
1380  do {
1381  int max_packet_size = ts->max_packet_size;
1383  max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1384 
1385  if (pes->data_index > 0 &&
1386  pes->data_index + buf_size > max_packet_size) {
1387  ret = new_pes_packet(pes, ts->pkt);
1388  if (ret < 0)
1389  return ret;
1390  pes->PES_packet_length = 0;
1391  max_packet_size = ts->max_packet_size;
1392  ts->stop_parse = 1;
1393  } else if (pes->data_index == 0 &&
1394  buf_size > max_packet_size) {
1395  // pes packet size is < ts size packet and pes data is padded with 0xff
1396  // not sure if this is legal in ts but see issue #2392
1397  buf_size = max_packet_size;
1398  }
1399 
1400  if (!pes->buffer) {
1401  pes->buffer = buffer_pool_get(ts, max_packet_size);
1402  if (!pes->buffer)
1403  return AVERROR(ENOMEM);
1404  }
1405 
1406  memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1407  pes->data_index += buf_size;
1408  /* emit complete packets with known packet size
1409  * decreases demuxer delay for infrequent packets like subtitles from
1410  * a couple of seconds to milliseconds for properly muxed files. */
1411  if (!ts->stop_parse && pes->PES_packet_length &&
1413  ts->stop_parse = 1;
1414  ret = new_pes_packet(pes, ts->pkt);
1415  pes->state = MPEGTS_SKIP;
1416  if (ret < 0)
1417  return ret;
1418  }
1419  } while (0);
1420  buf_size = 0;
1421  break;
1422  case MPEGTS_SKIP:
1423  buf_size = 0;
1424  break;
1425  }
1426  }
1427 
1428  return 0;
1429 }
1430 
1431 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1432 {
1433  MpegTSFilter *tss;
1434  PESContext *pes;
1435 
1436  /* if no pid found, then add a pid context */
1437  pes = av_mallocz(sizeof(PESContext));
1438  if (!pes)
1439  return 0;
1440  pes->ts = ts;
1441  pes->stream = ts->stream;
1442  pes->pid = pid;
1443  pes->pcr_pid = pcr_pid;
1444  pes->state = MPEGTS_SKIP;
1445  pes->pts = AV_NOPTS_VALUE;
1446  pes->dts = AV_NOPTS_VALUE;
1447  tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1448  if (!tss) {
1449  av_free(pes);
1450  return 0;
1451  }
1452  return pes;
1453 }
1454 
1455 #define MAX_LEVEL 4
1456 typedef struct MP4DescrParseContext {
1463  int level;
1466 
1468  const uint8_t *buf, unsigned size,
1469  Mp4Descr *descr, int max_descr_count)
1470 {
1471  if (size > (1 << 30))
1472  return AVERROR_INVALIDDATA;
1473 
1474  ffio_init_read_context(&d->pb, buf, size);
1475 
1476  d->s = s;
1477  d->level = 0;
1478  d->descr_count = 0;
1479  d->descr = descr;
1480  d->active_descr = NULL;
1481  d->max_descr_count = max_descr_count;
1482 
1483  return 0;
1484 }
1485 
1486 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1487 {
1488  int64_t new_off = avio_tell(pb);
1489  (*len) -= new_off - *off;
1490  *off = new_off;
1491 }
1492 
1493 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1494  int target_tag);
1495 
1496 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1497 {
1498  while (len > 0) {
1499  int ret = parse_mp4_descr(d, off, len, 0);
1500  if (ret < 0)
1501  return ret;
1502  update_offsets(&d->pb.pub, &off, &len);
1503  }
1504  return 0;
1505 }
1506 
1507 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1508 {
1509  AVIOContext *const pb = &d->pb.pub;
1510  avio_rb16(pb); // ID
1511  avio_r8(pb);
1512  avio_r8(pb);
1513  avio_r8(pb);
1514  avio_r8(pb);
1515  avio_r8(pb);
1516  update_offsets(pb, &off, &len);
1517  return parse_mp4_descr_arr(d, off, len);
1518 }
1519 
1520 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1521 {
1522  int id_flags;
1523  if (len < 2)
1524  return 0;
1525  id_flags = avio_rb16(&d->pb.pub);
1526  if (!(id_flags & 0x0020)) { // URL_Flag
1527  update_offsets(&d->pb.pub, &off, &len);
1528  return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1529  } else {
1530  return 0;
1531  }
1532 }
1533 
1534 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1535 {
1536  AVIOContext *const pb = &d->pb.pub;
1537  int es_id = 0;
1538  int ret = 0;
1539 
1540  if (d->descr_count >= d->max_descr_count)
1541  return AVERROR_INVALIDDATA;
1542  ff_mp4_parse_es_descr(pb, &es_id);
1543  d->active_descr = d->descr + (d->descr_count++);
1544 
1545  d->active_descr->es_id = es_id;
1546  update_offsets(pb, &off, &len);
1547  if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1548  return ret;
1549  update_offsets(pb, &off, &len);
1550  if (len > 0)
1552  d->active_descr = NULL;
1553  return ret;
1554 }
1555 
1557  int len)
1558 {
1559  Mp4Descr *descr = d->active_descr;
1560  if (!descr)
1561  return AVERROR_INVALIDDATA;
1562  d->active_descr->dec_config_descr = av_malloc(len);
1563  if (!descr->dec_config_descr)
1564  return AVERROR(ENOMEM);
1565  descr->dec_config_descr_len = len;
1566  avio_read(&d->pb.pub, descr->dec_config_descr, len);
1567  return 0;
1568 }
1569 
1570 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1571 {
1572  Mp4Descr *descr = d->active_descr;
1573  AVIOContext *const pb = &d->pb.pub;
1574  int predefined;
1575  if (!descr)
1576  return AVERROR_INVALIDDATA;
1577 
1578 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1579  descr->sl.dst = avio_r8(pb); \
1580  if (descr->sl.dst > maxv) { \
1581  descr->sl.dst = maxv; \
1582  return AVERROR_INVALIDDATA; \
1583  } \
1584 } while (0)
1585 
1586  predefined = avio_r8(pb);
1587  if (!predefined) {
1588  int lengths;
1589  int flags = avio_r8(pb);
1590  descr->sl.use_au_start = !!(flags & 0x80);
1591  descr->sl.use_au_end = !!(flags & 0x40);
1592  descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1593  descr->sl.use_padding = !!(flags & 0x08);
1594  descr->sl.use_timestamps = !!(flags & 0x04);
1595  descr->sl.use_idle = !!(flags & 0x02);
1596  descr->sl.timestamp_res = avio_rb32(pb);
1597  avio_rb32(pb);
1598  R8_CHECK_CLIP_MAX(timestamp_len, 63);
1599  R8_CHECK_CLIP_MAX(ocr_len, 63);
1600  R8_CHECK_CLIP_MAX(au_len, 31);
1601  descr->sl.inst_bitrate_len = avio_r8(pb);
1602  lengths = avio_rb16(pb);
1603  descr->sl.degr_prior_len = lengths >> 12;
1604  descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1605  descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1606  } else if (!d->predefined_SLConfigDescriptor_seen){
1607  avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1608  d->predefined_SLConfigDescriptor_seen = 1;
1609  }
1610  return 0;
1611 }
1612 
1613 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1614  int target_tag)
1615 {
1616  int tag;
1617  AVIOContext *const pb = &d->pb.pub;
1618  int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1619  int ret = 0;
1620 
1621  update_offsets(pb, &off, &len);
1622  if (len < 0 || len1 > len || len1 <= 0) {
1623  av_log(d->s, AV_LOG_ERROR,
1624  "Tag %x length violation new length %d bytes remaining %d\n",
1625  tag, len1, len);
1626  return AVERROR_INVALIDDATA;
1627  }
1628 
1629  if (d->level++ >= MAX_LEVEL) {
1630  av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1632  goto done;
1633  }
1634 
1635  if (target_tag && tag != target_tag) {
1636  av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1637  target_tag);
1639  goto done;
1640  }
1641 
1642  switch (tag) {
1643  case MP4IODescrTag:
1644  ret = parse_MP4IODescrTag(d, off, len1);
1645  break;
1646  case MP4ODescrTag:
1647  ret = parse_MP4ODescrTag(d, off, len1);
1648  break;
1649  case MP4ESDescrTag:
1650  ret = parse_MP4ESDescrTag(d, off, len1);
1651  break;
1652  case MP4DecConfigDescrTag:
1653  ret = parse_MP4DecConfigDescrTag(d, off, len1);
1654  break;
1655  case MP4SLDescrTag:
1656  ret = parse_MP4SLDescrTag(d, off, len1);
1657  break;
1658  }
1659 
1660 
1661 done:
1662  d->level--;
1663  avio_seek(pb, off + len1, SEEK_SET);
1664  return ret;
1665 }
1666 
1667 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1668  Mp4Descr *descr, int *descr_count, int max_descr_count)
1669 {
1671  int ret;
1672 
1673  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1674  if (ret < 0)
1675  return ret;
1676 
1677  ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1678 
1679  *descr_count = d.descr_count;
1680  return ret;
1681 }
1682 
1683 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1684  Mp4Descr *descr, int *descr_count, int max_descr_count)
1685 {
1687  int ret;
1688 
1689  ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1690  if (ret < 0)
1691  return ret;
1692 
1693  ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1694 
1695  *descr_count = d.descr_count;
1696  return ret;
1697 }
1698 
1699 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1700  int section_len)
1701 {
1702  MpegTSContext *ts = filter->u.section_filter.opaque;
1703  MpegTSSectionFilter *tssf = &filter->u.section_filter;
1704  SectionHeader h;
1705  const uint8_t *p, *p_end;
1706  int mp4_descr_count = 0;
1707  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1708  int i, pid;
1709  AVFormatContext *s = ts->stream;
1710 
1711  p_end = section + section_len - 4;
1712  p = section;
1713  if (parse_section_header(&h, &p, p_end) < 0)
1714  return;
1715  if (h.tid != M4OD_TID)
1716  return;
1717  if (skip_identical(&h, tssf))
1718  return;
1719 
1720  mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1722 
1723  for (pid = 0; pid < NB_PID_MAX; pid++) {
1724  if (!ts->pids[pid])
1725  continue;
1726  for (i = 0; i < mp4_descr_count; i++) {
1727  PESContext *pes;
1728  AVStream *st;
1729  FFStream *sti;
1730  FFIOContext pb;
1731  if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1732  continue;
1733  if (ts->pids[pid]->type != MPEGTS_PES) {
1734  av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1735  continue;
1736  }
1737  pes = ts->pids[pid]->u.pes_filter.opaque;
1738  st = pes->st;
1739  if (!st)
1740  continue;
1741  sti = ffstream(st);
1742 
1743  pes->sl = mp4_descr[i].sl;
1744 
1745  ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1746  mp4_descr[i].dec_config_descr_len);
1748  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1749  st->codecpar->extradata_size > 0)
1750  sti->need_parsing = 0;
1751  if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1752  st->codecpar->extradata_size > 0)
1753  sti->need_parsing = 0;
1754 
1756  sti->need_context_update = 1;
1757  }
1758  }
1759  for (i = 0; i < mp4_descr_count; i++)
1760  av_free(mp4_descr[i].dec_config_descr);
1761 }
1762 
1763 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1764  int section_len)
1765 {
1766  AVProgram *prg = NULL;
1767  MpegTSContext *ts = filter->u.section_filter.opaque;
1768 
1769  int idx = ff_find_stream_index(ts->stream, filter->pid);
1770  if (idx < 0)
1771  return;
1772 
1773  /**
1774  * In case we receive an SCTE-35 packet before mpegts context is fully
1775  * initialized.
1776  */
1777  if (!ts->pkt)
1778  return;
1779 
1780  new_data_packet(section, section_len, ts->pkt);
1781  ts->pkt->stream_index = idx;
1782  prg = av_find_program_from_stream(ts->stream, NULL, idx);
1783  if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1784  MpegTSFilter *f = ts->pids[prg->pcr_pid];
1785  if (f && f->last_pcr != -1)
1786  ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1787  }
1788  ts->stop_parse = 1;
1789 
1790 }
1791 
1792 static const uint8_t opus_coupled_stream_cnt[9] = {
1793  1, 0, 1, 1, 2, 2, 2, 3, 3
1794 };
1795 
1796 static const uint8_t opus_stream_cnt[9] = {
1797  1, 1, 1, 2, 2, 3, 4, 4, 5,
1798 };
1799 
1800 static const uint8_t opus_channel_map[8][8] = {
1801  { 0 },
1802  { 0,1 },
1803  { 0,2,1 },
1804  { 0,1,2,3 },
1805  { 0,4,1,2,3 },
1806  { 0,4,1,2,3,5 },
1807  { 0,4,1,2,3,5,6 },
1808  { 0,6,1,2,3,4,5,7 },
1809 };
1810 
1812  const uint8_t **pp, const uint8_t *desc_list_end,
1813  Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1814  MpegTSContext *ts)
1815 {
1816  FFStream *const sti = ffstream(st);
1817  const uint8_t *desc_end;
1818  int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1819  char language[252];
1820  int i;
1821 
1822  desc_tag = get8(pp, desc_list_end);
1823  if (desc_tag < 0)
1824  return AVERROR_INVALIDDATA;
1825  desc_len = get8(pp, desc_list_end);
1826  if (desc_len < 0)
1827  return AVERROR_INVALIDDATA;
1828  desc_end = *pp + desc_len;
1829  if (desc_end > desc_list_end)
1830  return AVERROR_INVALIDDATA;
1831 
1832  av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1833 
1834  if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1835  stream_type == STREAM_TYPE_PRIVATE_DATA)
1836  mpegts_find_stream_type(st, desc_tag, DESC_types);
1837 
1838  switch (desc_tag) {
1840  if (get8(pp, desc_end) & 0x1) {
1842  }
1843  break;
1844  case SL_DESCRIPTOR:
1845  desc_es_id = get16(pp, desc_end);
1846  if (desc_es_id < 0)
1847  break;
1848  if (ts && ts->pids[pid])
1849  ts->pids[pid]->es_id = desc_es_id;
1850  for (i = 0; i < mp4_descr_count; i++)
1851  if (mp4_descr[i].dec_config_descr_len &&
1852  mp4_descr[i].es_id == desc_es_id) {
1853  FFIOContext pb;
1854  ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1855  mp4_descr[i].dec_config_descr_len);
1857  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1858  st->codecpar->extradata_size > 0) {
1859  sti->need_parsing = 0;
1860  sti->need_context_update = 1;
1861  }
1863  mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1864  }
1865  break;
1866  case FMC_DESCRIPTOR:
1867  if (get16(pp, desc_end) < 0)
1868  break;
1869  if (mp4_descr_count > 0 &&
1871  (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1872  sti->request_probe > 0) &&
1873  mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1874  FFIOContext pb;
1875  ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1876  mp4_descr->dec_config_descr_len);
1878  if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1879  st->codecpar->extradata_size > 0) {
1880  sti->request_probe = sti->need_parsing = 0;
1882  sti->need_context_update = 1;
1883  }
1884  }
1885  break;
1886  case 0x56: /* DVB teletext descriptor */
1887  {
1888  uint8_t *extradata = NULL;
1889  int language_count = desc_len / 5, ret;
1890 
1891  if (desc_len > 0 && desc_len % 5 != 0)
1892  return AVERROR_INVALIDDATA;
1893 
1894  if (language_count > 0) {
1895  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1896  av_assert0(language_count <= sizeof(language) / 4);
1897 
1898  if (st->codecpar->extradata == NULL) {
1899  ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1900  if (ret < 0)
1901  return ret;
1902  }
1903 
1904  if (st->codecpar->extradata_size < language_count * 2)
1905  return AVERROR_INVALIDDATA;
1906 
1907  extradata = st->codecpar->extradata;
1908 
1909  for (i = 0; i < language_count; i++) {
1910  language[i * 4 + 0] = get8(pp, desc_end);
1911  language[i * 4 + 1] = get8(pp, desc_end);
1912  language[i * 4 + 2] = get8(pp, desc_end);
1913  language[i * 4 + 3] = ',';
1914 
1915  memcpy(extradata, *pp, 2);
1916  extradata += 2;
1917 
1918  *pp += 2;
1919  }
1920 
1921  language[i * 4 - 1] = 0;
1922  av_dict_set(&st->metadata, "language", language, 0);
1923  sti->need_context_update = 1;
1924  }
1925  }
1926  break;
1927  case 0x59: /* subtitling descriptor */
1928  {
1929  /* 8 bytes per DVB subtitle substream data:
1930  * ISO_639_language_code (3 bytes),
1931  * subtitling_type (1 byte),
1932  * composition_page_id (2 bytes),
1933  * ancillary_page_id (2 bytes) */
1934  int language_count = desc_len / 8, ret;
1935 
1936  if (desc_len > 0 && desc_len % 8 != 0)
1937  return AVERROR_INVALIDDATA;
1938 
1939  if (language_count > 1) {
1940  avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1941  }
1942 
1943  if (language_count > 0) {
1944  uint8_t *extradata;
1945 
1946  /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1947  av_assert0(language_count <= sizeof(language) / 4);
1948 
1949  if (st->codecpar->extradata == NULL) {
1950  ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1951  if (ret < 0)
1952  return ret;
1953  }
1954 
1955  if (st->codecpar->extradata_size < language_count * 5)
1956  return AVERROR_INVALIDDATA;
1957 
1958  extradata = st->codecpar->extradata;
1959 
1960  for (i = 0; i < language_count; i++) {
1961  language[i * 4 + 0] = get8(pp, desc_end);
1962  language[i * 4 + 1] = get8(pp, desc_end);
1963  language[i * 4 + 2] = get8(pp, desc_end);
1964  language[i * 4 + 3] = ',';
1965 
1966  /* hearing impaired subtitles detection using subtitling_type */
1967  switch (*pp[0]) {
1968  case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1969  case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1970  case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1971  case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1972  case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1973  case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1975  break;
1976  }
1977 
1978  extradata[4] = get8(pp, desc_end); /* subtitling_type */
1979  memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1980  extradata += 5;
1981 
1982  *pp += 4;
1983  }
1984 
1985  language[i * 4 - 1] = 0;
1986  av_dict_set(&st->metadata, "language", language, 0);
1987  sti->need_context_update = 1;
1988  }
1989  }
1990  break;
1992  for (i = 0; i + 4 <= desc_len; i += 4) {
1993  language[i + 0] = get8(pp, desc_end);
1994  language[i + 1] = get8(pp, desc_end);
1995  language[i + 2] = get8(pp, desc_end);
1996  language[i + 3] = ',';
1997  switch (get8(pp, desc_end)) {
1998  case 0x01:
2000  break;
2001  case 0x02:
2003  break;
2004  case 0x03:
2007  break;
2008  }
2009  }
2010  if (i && language[0]) {
2011  language[i - 1] = 0;
2012  /* don't overwrite language, as it may already have been set by
2013  * another, more specific descriptor (e.g. supplementary audio) */
2015  }
2016  break;
2018  st->codecpar->codec_tag = bytestream_get_le32(pp);
2019  av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2020  if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2022  if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2023  sti->request_probe = 50;
2024  }
2025  break;
2026  case 0x52: /* stream identifier descriptor */
2027  sti->stream_identifier = 1 + get8(pp, desc_end);
2028  break;
2029  case METADATA_DESCRIPTOR:
2030  if (get16(pp, desc_end) == 0xFFFF)
2031  *pp += 4;
2032  if (get8(pp, desc_end) == 0xFF) {
2033  st->codecpar->codec_tag = bytestream_get_le32(pp);
2034  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2036  }
2037  break;
2038  case 0x7f: /* DVB extension descriptor */
2039  ext_desc_tag = get8(pp, desc_end);
2040  if (ext_desc_tag < 0)
2041  return AVERROR_INVALIDDATA;
2042  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2043  ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2044  if (!st->codecpar->extradata) {
2047  if (!st->codecpar->extradata)
2048  return AVERROR(ENOMEM);
2049 
2052 
2053  channel_config_code = get8(pp, desc_end);
2054  if (channel_config_code < 0)
2055  return AVERROR_INVALIDDATA;
2056  if (channel_config_code <= 0x8) {
2057  st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2058  AV_WL32(&st->codecpar->extradata[12], 48000);
2059  st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2060  st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2061  st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2062  memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2063  st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2064  } else {
2065  avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2066  }
2068  sti->need_context_update = 1;
2069  }
2070  }
2071  if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2072  int flags;
2073 
2074  if (desc_len < 1)
2075  return AVERROR_INVALIDDATA;
2076  flags = get8(pp, desc_end);
2077 
2078  if ((flags & 0x80) == 0) /* mix_type */
2080 
2081  switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2082  case 0x01:
2085  break;
2086  case 0x02:
2088  break;
2089  case 0x03:
2091  break;
2092  }
2093 
2094  if (flags & 0x01) { /* language_code_present */
2095  if (desc_len < 4)
2096  return AVERROR_INVALIDDATA;
2097  language[0] = get8(pp, desc_end);
2098  language[1] = get8(pp, desc_end);
2099  language[2] = get8(pp, desc_end);
2100  language[3] = 0;
2101 
2102  /* This language always has to override a possible
2103  * ISO 639 language descriptor language */
2104  if (language[0])
2105  av_dict_set(&st->metadata, "language", language, 0);
2106  }
2107  }
2108  break;
2109  case 0x6a: /* ac-3_descriptor */
2110  {
2111  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2112  if (component_type_flag) {
2113  int component_type = get8(pp, desc_end);
2114  int service_type_mask = 0x38; // 0b00111000
2115  int service_type = ((component_type & service_type_mask) >> 3);
2116  if (service_type == 0x02 /* 0b010 */) {
2118  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2119  }
2120  }
2121  }
2122  break;
2123  case 0x7a: /* enhanced_ac-3_descriptor */
2124  {
2125  int component_type_flag = get8(pp, desc_end) & (1 << 7);
2126  if (component_type_flag) {
2127  int component_type = get8(pp, desc_end);
2128  int service_type_mask = 0x38; // 0b00111000
2129  int service_type = ((component_type & service_type_mask) >> 3);
2130  if (service_type == 0x02 /* 0b010 */) {
2132  av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2133  }
2134  }
2135  }
2136  break;
2137  case 0xfd: /* ARIB data coding type descriptor */
2138  // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2139  // for captions
2140  if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2141  // This structure is defined in STD-B10, part 1, listing 5.4 and
2142  // part 2, 6.2.20).
2143  // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2144  // Component tag limits are documented in TR-B14, fascicle 2,
2145  // Vol. 3, Section 2, 4.2.8.1
2146  int actual_component_tag = sti->stream_identifier - 1;
2147  int picked_profile = AV_PROFILE_UNKNOWN;
2148  int data_component_id = get16(pp, desc_end);
2149  if (data_component_id < 0)
2150  return AVERROR_INVALIDDATA;
2151 
2152  switch (data_component_id) {
2153  case 0x0008:
2154  // [0x30..0x37] are component tags utilized for
2155  // non-mobile captioning service ("profile A").
2156  if (actual_component_tag >= 0x30 &&
2157  actual_component_tag <= 0x37) {
2158  picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2159  }
2160  break;
2161  case 0x0012:
2162  // component tag 0x87 signifies a mobile/partial reception
2163  // (1seg) captioning service ("profile C").
2164  if (actual_component_tag == 0x87) {
2165  picked_profile = AV_PROFILE_ARIB_PROFILE_C;
2166  }
2167  break;
2168  default:
2169  break;
2170  }
2171 
2172  if (picked_profile == AV_PROFILE_UNKNOWN)
2173  break;
2174 
2177  if (st->codecpar->profile != picked_profile) {
2178  st->codecpar->profile = picked_profile;
2179  sti->need_context_update = 1;
2180  }
2181  sti->request_probe = 0;
2182  sti->need_parsing = 0;
2183  }
2184  break;
2185  case 0xb0: /* DOVI video stream descriptor */
2186  {
2187  uint32_t buf;
2189  size_t dovi_size;
2190  int dependency_pid;
2191 
2192  if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2193  return AVERROR_INVALIDDATA;
2194 
2195  dovi = av_dovi_alloc(&dovi_size);
2196  if (!dovi)
2197  return AVERROR(ENOMEM);
2198 
2199  dovi->dv_version_major = get8(pp, desc_end);
2200  dovi->dv_version_minor = get8(pp, desc_end);
2201  buf = get16(pp, desc_end);
2202  dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2203  dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2204  dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2205  dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2206  dovi->bl_present_flag = buf & 0x01; // 1 bit
2207  if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
2208  buf = get16(pp, desc_end);
2209  dependency_pid = buf >> 3; // 13 bits
2210  }
2211  if (desc_end - *pp >= 1) { // 8 bits
2212  buf = get8(pp, desc_end);
2213  dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2214  } else {
2215  // 0 stands for None
2216  // Dolby Vision V1.2.93 profiles and levels
2218  }
2219 
2223  (uint8_t *)dovi, dovi_size, 0)) {
2224  av_free(dovi);
2225  return AVERROR(ENOMEM);
2226  }
2227 
2228  av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2229  "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, compatibility id: %d\n",
2230  dovi->dv_version_major, dovi->dv_version_minor,
2231  dovi->dv_profile, dovi->dv_level,
2232  dovi->rpu_present_flag,
2233  dovi->el_present_flag,
2234  dovi->bl_present_flag,
2235  dependency_pid,
2236  dovi->dv_bl_signal_compatibility_id);
2237  }
2238  break;
2239  default:
2240  break;
2241  }
2242  *pp = desc_end;
2243  return 0;
2244 }
2245 
2246 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2247  int stream_identifier, int pmt_stream_idx, struct Program *p)
2248 {
2249  AVFormatContext *s = ts->stream;
2250  AVStream *found = NULL;
2251 
2252  if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2253  for (int i = 0; i < p->nb_streams; i++) {
2254  if (p->streams[i].stream_identifier == stream_identifier)
2255  if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2256  found = s->streams[p->streams[i].idx];
2257  }
2258  } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2259  found = s->streams[p->streams[pmt_stream_idx].idx];
2260  }
2261 
2262  if (found) {
2264  "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2266  found->index, found->id, pid);
2267  }
2268 
2269  return found;
2270 }
2271 
2272 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2273 {
2274  const uint8_t **pp = &p;
2275  const uint8_t *desc_list_end;
2276  const uint8_t *desc_end;
2277  int desc_list_len;
2278  int desc_len, desc_tag;
2279 
2280  desc_list_len = get16(pp, p_end);
2281  if (desc_list_len < 0)
2282  return -1;
2283  desc_list_len &= 0xfff;
2284  desc_list_end = p + desc_list_len;
2285  if (desc_list_end > p_end)
2286  return -1;
2287 
2288  while (1) {
2289  desc_tag = get8(pp, desc_list_end);
2290  if (desc_tag < 0)
2291  return -1;
2292  desc_len = get8(pp, desc_list_end);
2293  if (desc_len < 0)
2294  return -1;
2295  desc_end = *pp + desc_len;
2296  if (desc_end > desc_list_end)
2297  return -1;
2298 
2299  if (desc_tag == 0x52) {
2300  return get8(pp, desc_end);
2301  }
2302  *pp = desc_end;
2303  }
2304 
2305  return -1;
2306 }
2307 
2308 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2309 {
2310  return !(stream_type == 0x13 ||
2311  (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2312 }
2313 
2314 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2315 {
2316  MpegTSContext *ts = filter->u.section_filter.opaque;
2317  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2318  struct Program old_program;
2319  SectionHeader h1, *h = &h1;
2320  PESContext *pes;
2321  AVStream *st;
2322  const uint8_t *p, *p_end, *desc_list_end;
2323  int program_info_length, pcr_pid, pid, stream_type;
2324  int desc_list_len;
2325  uint32_t prog_reg_desc = 0; /* registration descriptor */
2326  int stream_identifier = -1;
2327  struct Program *prg;
2328 
2329  int mp4_descr_count = 0;
2330  Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2331  int i;
2332 
2333  av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2334  hex_dump_debug(ts->stream, section, section_len);
2335 
2336  p_end = section + section_len - 4;
2337  p = section;
2338  if (parse_section_header(h, &p, p_end) < 0)
2339  return;
2340  if (h->tid != PMT_TID)
2341  return;
2342  if (!h->current_next)
2343  return;
2344  if (skip_identical(h, tssf))
2345  return;
2346 
2347  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2348  h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2349 
2350  if (!ts->scan_all_pmts && ts->skip_changes)
2351  return;
2352 
2353  prg = get_program(ts, h->id);
2354  if (prg)
2355  old_program = *prg;
2356  else
2357  clear_program(&old_program);
2358 
2359  if (ts->skip_unknown_pmt && !prg)
2360  return;
2361  if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2362  return;
2363  if (!ts->skip_clear)
2364  clear_avprogram(ts, h->id);
2365  clear_program(prg);
2366  add_pid_to_program(prg, ts->current_pid);
2367 
2368  pcr_pid = get16(&p, p_end);
2369  if (pcr_pid < 0)
2370  return;
2371  pcr_pid &= 0x1fff;
2372  add_pid_to_program(prg, pcr_pid);
2373  update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2374 
2375  av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2376 
2377  program_info_length = get16(&p, p_end);
2378  if (program_info_length < 0)
2379  return;
2380  program_info_length &= 0xfff;
2381  while (program_info_length >= 2) {
2382  uint8_t tag, len;
2383  tag = get8(&p, p_end);
2384  len = get8(&p, p_end);
2385 
2386  av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2387 
2388  program_info_length -= 2;
2389  if (len > program_info_length)
2390  // something else is broken, exit the program_descriptors_loop
2391  break;
2392  program_info_length -= len;
2393  if (tag == IOD_DESCRIPTOR) {
2394  get8(&p, p_end); // scope
2395  get8(&p, p_end); // label
2396  len -= 2;
2397  mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2398  &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2399  } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2400  prog_reg_desc = bytestream_get_le32(&p);
2401  len -= 4;
2402  }
2403  p += len;
2404  }
2405  p += program_info_length;
2406  if (p >= p_end)
2407  goto out;
2408 
2409  // stop parsing after pmt, we found header
2410  if (!ts->pkt)
2411  ts->stop_parse = 2;
2412 
2413  if (prg)
2414  prg->pmt_found = 1;
2415 
2416  for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2417  st = 0;
2418  pes = NULL;
2419  stream_type = get8(&p, p_end);
2420  if (stream_type < 0)
2421  break;
2422  pid = get16(&p, p_end);
2423  if (pid < 0)
2424  goto out;
2425  pid &= 0x1fff;
2426  if (pid == ts->current_pid)
2427  goto out;
2428 
2429  stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2430 
2431  /* now create stream */
2432  if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2433  pes = ts->pids[pid]->u.pes_filter.opaque;
2434  if (ts->merge_pmt_versions && !pes->st) {
2435  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2436  if (st) {
2437  pes->st = st;
2438  pes->stream_type = stream_type;
2439  pes->merged_st = 1;
2440  }
2441  }
2442  if (!pes->st) {
2443  pes->st = avformat_new_stream(pes->stream, NULL);
2444  if (!pes->st)
2445  goto out;
2446  pes->st->id = pes->pid;
2447  }
2448  st = pes->st;
2449  } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2450  if (ts->pids[pid])
2451  mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2452  pes = add_pes_stream(ts, pid, pcr_pid);
2453  if (ts->merge_pmt_versions && pes && !pes->st) {
2454  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2455  if (st) {
2456  pes->st = st;
2457  pes->stream_type = stream_type;
2458  pes->merged_st = 1;
2459  }
2460  }
2461  if (pes && !pes->st) {
2462  st = avformat_new_stream(pes->stream, NULL);
2463  if (!st)
2464  goto out;
2465  st->id = pes->pid;
2466  }
2467  } else {
2468  int idx = ff_find_stream_index(ts->stream, pid);
2469  if (idx >= 0) {
2470  st = ts->stream->streams[idx];
2471  }
2472  if (ts->merge_pmt_versions && !st) {
2473  st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2474  }
2475  if (!st) {
2476  st = avformat_new_stream(ts->stream, NULL);
2477  if (!st)
2478  goto out;
2479  st->id = pid;
2481  if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2482  mpegts_find_stream_type(st, stream_type, SCTE_types);
2483  mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2484  }
2485  }
2486  }
2487 
2488  if (!st)
2489  goto out;
2490 
2491  if (pes && !pes->stream_type)
2492  mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2493 
2494  add_pid_to_program(prg, pid);
2495  if (prg) {
2496  prg->streams[i].idx = st->index;
2497  prg->streams[i].stream_identifier = stream_identifier;
2498  prg->nb_streams++;
2499  }
2500 
2501  av_program_add_stream_index(ts->stream, h->id, st->index);
2502 
2503  desc_list_len = get16(&p, p_end);
2504  if (desc_list_len < 0)
2505  goto out;
2506  desc_list_len &= 0xfff;
2507  desc_list_end = p + desc_list_len;
2508  if (desc_list_end > p_end)
2509  goto out;
2510  for (;;) {
2511  if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2512  desc_list_end, mp4_descr,
2513  mp4_descr_count, pid, ts) < 0)
2514  break;
2515 
2516  if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2517  stream_type == 0x83 && pes->sub_st) {
2519  pes->sub_st->index);
2520  pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2521  }
2522  }
2523  p = desc_list_end;
2524  }
2525 
2526  if (!ts->pids[pcr_pid])
2527  mpegts_open_pcr_filter(ts, pcr_pid);
2528 
2529 out:
2530  for (i = 0; i < mp4_descr_count; i++)
2531  av_free(mp4_descr[i].dec_config_descr);
2532 }
2533 
2534 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2535 {
2536  MpegTSContext *ts = filter->u.section_filter.opaque;
2537  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2538  SectionHeader h1, *h = &h1;
2539  const uint8_t *p, *p_end;
2540  int sid, pmt_pid;
2541  int nb_prg = 0;
2542  AVProgram *program;
2543 
2544  av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2545  hex_dump_debug(ts->stream, section, section_len);
2546 
2547  p_end = section + section_len - 4;
2548  p = section;
2549  if (parse_section_header(h, &p, p_end) < 0)
2550  return;
2551  if (h->tid != PAT_TID)
2552  return;
2553  if (!h->current_next)
2554  return;
2555  if (ts->skip_changes)
2556  return;
2557 
2558  if (skip_identical(h, tssf))
2559  return;
2560  ts->stream->ts_id = h->id;
2561 
2562  for (;;) {
2563  sid = get16(&p, p_end);
2564  if (sid < 0)
2565  break;
2566  pmt_pid = get16(&p, p_end);
2567  if (pmt_pid < 0)
2568  break;
2569  pmt_pid &= 0x1fff;
2570 
2571  if (pmt_pid == ts->current_pid)
2572  break;
2573 
2574  av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2575 
2576  if (sid == 0x0000) {
2577  /* NIT info */
2578  } else {
2579  MpegTSFilter *fil = ts->pids[pmt_pid];
2580  struct Program *prg;
2581  program = av_new_program(ts->stream, sid);
2582  if (program) {
2583  program->program_num = sid;
2584  program->pmt_pid = pmt_pid;
2585  }
2586  if (fil)
2587  if ( fil->type != MPEGTS_SECTION
2588  || fil->pid != pmt_pid
2589  || fil->u.section_filter.section_cb != pmt_cb)
2590  mpegts_close_filter(ts, ts->pids[pmt_pid]);
2591 
2592  if (!ts->pids[pmt_pid])
2593  mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2594  prg = add_program(ts, sid);
2595  if (prg) {
2596  unsigned prg_idx = prg - ts->prg;
2597  if (prg->nb_pids && prg->pids[0] != pmt_pid)
2598  clear_program(prg);
2599  add_pid_to_program(prg, pmt_pid);
2600  if (prg_idx > nb_prg)
2601  FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2602  if (prg_idx >= nb_prg)
2603  nb_prg++;
2604  }
2605  }
2606  }
2607  ts->nb_prg = nb_prg;
2608 
2609  if (sid < 0) {
2610  int i,j;
2611  for (j=0; j<ts->stream->nb_programs; j++) {
2612  for (i = 0; i < ts->nb_prg; i++)
2613  if (ts->prg[i].id == ts->stream->programs[j]->id)
2614  break;
2615  if (i==ts->nb_prg && !ts->skip_clear)
2616  clear_avprogram(ts, ts->stream->programs[j]->id);
2617  }
2618  }
2619 }
2620 
2621 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2622 {
2623  MpegTSContext *ts = filter->u.section_filter.opaque;
2624  const uint8_t *p, *p_end;
2625  SectionHeader h1, *h = &h1;
2626 
2627  /*
2628  * Sometimes we receive EPG packets but SDT table do not have
2629  * eit_pres_following or eit_sched turned on, so we open EPG
2630  * stream directly here.
2631  */
2632  if (!ts->epg_stream) {
2634  if (!ts->epg_stream)
2635  return;
2636  ts->epg_stream->id = EIT_PID;
2639  }
2640 
2641  if (ts->epg_stream->discard == AVDISCARD_ALL)
2642  return;
2643 
2644  p_end = section + section_len - 4;
2645  p = section;
2646 
2647  if (parse_section_header(h, &p, p_end) < 0)
2648  return;
2649  if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2650  return;
2651 
2652  av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2653 
2654  /**
2655  * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2656  * is scrambled.
2657  */
2658  if (h->id == 0xFFFF) {
2659  av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2660  return;
2661  }
2662 
2663  /**
2664  * In case we receive an EPG packet before mpegts context is fully
2665  * initialized.
2666  */
2667  if (!ts->pkt)
2668  return;
2669 
2670  new_data_packet(section, section_len, ts->pkt);
2671  ts->pkt->stream_index = ts->epg_stream->index;
2672  ts->stop_parse = 1;
2673 }
2674 
2675 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2676 {
2677  MpegTSContext *ts = filter->u.section_filter.opaque;
2678  MpegTSSectionFilter *tssf = &filter->u.section_filter;
2679  SectionHeader h1, *h = &h1;
2680  const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2681  int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2682  char *name, *provider_name;
2683 
2684  av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2685  hex_dump_debug(ts->stream, section, section_len);
2686 
2687  p_end = section + section_len - 4;
2688  p = section;
2689  if (parse_section_header(h, &p, p_end) < 0)
2690  return;
2691  if (h->tid != SDT_TID)
2692  return;
2693  if (!h->current_next)
2694  return;
2695  if (ts->skip_changes)
2696  return;
2697  if (skip_identical(h, tssf))
2698  return;
2699 
2700  onid = get16(&p, p_end);
2701  if (onid < 0)
2702  return;
2703  val = get8(&p, p_end);
2704  if (val < 0)
2705  return;
2706  for (;;) {
2707  sid = get16(&p, p_end);
2708  if (sid < 0)
2709  break;
2710  val = get8(&p, p_end);
2711  if (val < 0)
2712  break;
2713  desc_list_len = get16(&p, p_end);
2714  if (desc_list_len < 0)
2715  break;
2716  desc_list_len &= 0xfff;
2717  desc_list_end = p + desc_list_len;
2718  if (desc_list_end > p_end)
2719  break;
2720  for (;;) {
2721  desc_tag = get8(&p, desc_list_end);
2722  if (desc_tag < 0)
2723  break;
2724  desc_len = get8(&p, desc_list_end);
2725  desc_end = p + desc_len;
2726  if (desc_len < 0 || desc_end > desc_list_end)
2727  break;
2728 
2729  av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2730  desc_tag, desc_len);
2731 
2732  switch (desc_tag) {
2733  case 0x48:
2734  service_type = get8(&p, desc_end);
2735  if (service_type < 0)
2736  break;
2737  provider_name = getstr8(&p, desc_end);
2738  if (!provider_name)
2739  break;
2740  name = getstr8(&p, desc_end);
2741  if (name) {
2742  AVProgram *program = av_new_program(ts->stream, sid);
2743  if (program) {
2744  av_dict_set(&program->metadata, "service_name", name, 0);
2745  av_dict_set(&program->metadata, "service_provider",
2746  provider_name, 0);
2747  }
2748  }
2749  av_free(name);
2750  av_free(provider_name);
2751  break;
2752  default:
2753  break;
2754  }
2755  p = desc_end;
2756  }
2757  p = desc_list_end;
2758  }
2759 }
2760 
2761 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2762  const uint8_t *packet);
2763 
2764 /* handle one TS packet */
2765 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2766 {
2767  MpegTSFilter *tss;
2768  int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2769  has_adaptation, has_payload;
2770  const uint8_t *p, *p_end;
2771 
2772  pid = AV_RB16(packet + 1) & 0x1fff;
2773  is_start = packet[1] & 0x40;
2774  tss = ts->pids[pid];
2775  if (ts->auto_guess && !tss && is_start) {
2776  add_pes_stream(ts, pid, -1);
2777  tss = ts->pids[pid];
2778  }
2779  if (!tss)
2780  return 0;
2781  if (is_start)
2782  tss->discard = discard_pid(ts, pid);
2783  if (tss->discard)
2784  return 0;
2785  ts->current_pid = pid;
2786 
2787  afc = (packet[3] >> 4) & 3;
2788  if (afc == 0) /* reserved value */
2789  return 0;
2790  has_adaptation = afc & 2;
2791  has_payload = afc & 1;
2792  is_discontinuity = has_adaptation &&
2793  packet[4] != 0 && /* with length > 0 */
2794  (packet[5] & 0x80); /* and discontinuity indicated */
2795 
2796  /* continuity check (currently not used) */
2797  cc = (packet[3] & 0xf);
2798  expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2799  cc_ok = pid == 0x1FFF || // null packet PID
2800  is_discontinuity ||
2801  tss->last_cc < 0 ||
2802  expected_cc == cc;
2803 
2804  tss->last_cc = cc;
2805  if (!cc_ok) {
2806  av_log(ts->stream, AV_LOG_DEBUG,
2807  "Continuity check failed for pid %d expected %d got %d\n",
2808  pid, expected_cc, cc);
2809  if (tss->type == MPEGTS_PES) {
2810  PESContext *pc = tss->u.pes_filter.opaque;
2811  pc->flags |= AV_PKT_FLAG_CORRUPT;
2812  }
2813  }
2814 
2815  if (packet[1] & 0x80) {
2816  av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2817  if (tss->type == MPEGTS_PES) {
2818  PESContext *pc = tss->u.pes_filter.opaque;
2819  pc->flags |= AV_PKT_FLAG_CORRUPT;
2820  }
2821  }
2822 
2823  p = packet + 4;
2824  if (has_adaptation) {
2825  int64_t pcr_h;
2826  int pcr_l;
2827  if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2828  tss->last_pcr = pcr_h * 300 + pcr_l;
2829  /* skip adaptation field */
2830  p += p[0] + 1;
2831  }
2832  /* if past the end of packet, ignore */
2833  p_end = packet + TS_PACKET_SIZE;
2834  if (p >= p_end || !has_payload)
2835  return 0;
2836 
2837  if (pos >= 0) {
2839  ts->pos47_full = pos - TS_PACKET_SIZE;
2840  }
2841 
2842  if (tss->type == MPEGTS_SECTION) {
2843  if (is_start) {
2844  /* pointer field present */
2845  len = *p++;
2846  if (len > p_end - p)
2847  return 0;
2848  if (len && cc_ok) {
2849  /* write remaining section bytes */
2850  write_section_data(ts, tss,
2851  p, len, 0);
2852  /* check whether filter has been closed */
2853  if (!ts->pids[pid])
2854  return 0;
2855  }
2856  p += len;
2857  if (p < p_end) {
2858  write_section_data(ts, tss,
2859  p, p_end - p, 1);
2860  }
2861  } else {
2862  if (cc_ok) {
2863  write_section_data(ts, tss,
2864  p, p_end - p, 0);
2865  }
2866  }
2867 
2868  // stop find_stream_info from waiting for more streams
2869  // when all programs have received a PMT
2870  if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2871  int i;
2872  for (i = 0; i < ts->nb_prg; i++) {
2873  if (!ts->prg[i].pmt_found)
2874  break;
2875  }
2876  if (i == ts->nb_prg && ts->nb_prg > 0) {
2877  av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2879  }
2880  }
2881 
2882  } else {
2883  int ret;
2884  // Note: The position here points actually behind the current packet.
2885  if (tss->type == MPEGTS_PES) {
2886  if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2887  pos - ts->raw_packet_size)) < 0)
2888  return ret;
2889  }
2890  }
2891 
2892  return 0;
2893 }
2894 
2895 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2896 {
2897  MpegTSContext *ts = s->priv_data;
2898  AVIOContext *pb = s->pb;
2899  int c, i;
2900  uint64_t pos = avio_tell(pb);
2901  int64_t back = FFMIN(seekback, pos);
2902 
2903  //Special case for files like 01c56b0dc1.ts
2904  if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
2905  avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2906  return 0;
2907  }
2908 
2909  avio_seek(pb, -back, SEEK_CUR);
2910 
2911  for (i = 0; i < ts->resync_size; i++) {
2912  c = avio_r8(pb);
2913  if (avio_feof(pb))
2914  return AVERROR_EOF;
2915  if (c == 0x47) {
2916  int new_packet_size, ret;
2917  avio_seek(pb, -1, SEEK_CUR);
2918  pos = avio_tell(pb);
2920  if (ret < 0)
2921  return ret;
2922  new_packet_size = get_packet_size(s);
2923  if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2924  av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2925  ts->raw_packet_size = new_packet_size;
2926  }
2927  avio_seek(pb, pos, SEEK_SET);
2928  return 0;
2929  }
2930  }
2932  "max resync size reached, could not find sync byte\n");
2933  /* no sync found */
2934  return AVERROR_INVALIDDATA;
2935 }
2936 
2937 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2938 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2939  const uint8_t **data)
2940 {
2941  AVIOContext *pb = s->pb;
2942  int len;
2943 
2944  for (;;) {
2946  if (len != TS_PACKET_SIZE)
2947  return len < 0 ? len : AVERROR_EOF;
2948  /* check packet sync byte */
2949  if ((*data)[0] != 0x47) {
2950  /* find a new packet start */
2951 
2952  if (mpegts_resync(s, raw_packet_size, *data) < 0)
2953  return AVERROR(EAGAIN);
2954  else
2955  continue;
2956  } else {
2957  break;
2958  }
2959  }
2960  return 0;
2961 }
2962 
2963 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2964 {
2965  AVIOContext *pb = s->pb;
2966  int skip = raw_packet_size - TS_PACKET_SIZE;
2967  if (skip > 0)
2968  avio_skip(pb, skip);
2969 }
2970 
2971 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2972 {
2973  AVFormatContext *s = ts->stream;
2975  const uint8_t *data;
2976  int64_t packet_num;
2977  int ret = 0;
2978 
2979  if (avio_tell(s->pb) != ts->last_pos) {
2980  int i;
2981  av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2982  /* seek detected, flush pes buffer */
2983  for (i = 0; i < NB_PID_MAX; i++) {
2984  if (ts->pids[i]) {
2985  if (ts->pids[i]->type == MPEGTS_PES) {
2986  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2987  av_buffer_unref(&pes->buffer);
2988  pes->data_index = 0;
2989  pes->state = MPEGTS_SKIP; /* skip until pes header */
2990  } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2991  ts->pids[i]->u.section_filter.last_ver = -1;
2992  }
2993  ts->pids[i]->last_cc = -1;
2994  ts->pids[i]->last_pcr = -1;
2995  }
2996  }
2997  }
2998 
2999  ts->stop_parse = 0;
3000  packet_num = 0;
3002  for (;;) {
3003  packet_num++;
3004  if (nb_packets != 0 && packet_num >= nb_packets ||
3005  ts->stop_parse > 1) {
3006  ret = AVERROR(EAGAIN);
3007  break;
3008  }
3009  if (ts->stop_parse > 0)
3010  break;
3011 
3013  if (ret != 0)
3014  break;
3015  ret = handle_packet(ts, data, avio_tell(s->pb));
3017  if (ret != 0)
3018  break;
3019  }
3020  ts->last_pos = avio_tell(s->pb);
3021  return ret;
3022 }
3023 
3024 static int mpegts_probe(const AVProbeData *p)
3025 {
3026  const int size = p->buf_size;
3027  int maxscore = 0;
3028  int sumscore = 0;
3029  int i;
3030  int check_count = size / TS_FEC_PACKET_SIZE;
3031 #define CHECK_COUNT 10
3032 #define CHECK_BLOCK 100
3033 
3034  if (!check_count)
3035  return 0;
3036 
3037  for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3038  int left = FFMIN(check_count - i, CHECK_BLOCK);
3039  int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3042  score = FFMAX3(score, dvhs_score, fec_score);
3043  sumscore += score;
3044  maxscore = FFMAX(maxscore, score);
3045  }
3046 
3047  sumscore = sumscore * CHECK_COUNT / check_count;
3048  maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3049 
3050  ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3051 
3052  if (check_count > CHECK_COUNT && sumscore > 6) {
3053  return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3054  } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3055  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3056  } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3057  return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3058  } else if (sumscore > 6) {
3059  return 2;
3060  } else {
3061  return 0;
3062  }
3063 }
3064 
3065 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3066  * (-1) if not available */
3067 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3068 {
3069  int afc, len, flags;
3070  const uint8_t *p;
3071  unsigned int v;
3072 
3073  afc = (packet[3] >> 4) & 3;
3074  if (afc <= 1)
3075  return AVERROR_INVALIDDATA;
3076  p = packet + 4;
3077  len = p[0];
3078  p++;
3079  if (len == 0)
3080  return AVERROR_INVALIDDATA;
3081  flags = *p++;
3082  len--;
3083  if (!(flags & 0x10))
3084  return AVERROR_INVALIDDATA;
3085  if (len < 6)
3086  return AVERROR_INVALIDDATA;
3087  v = AV_RB32(p);
3088  *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3089  *ppcr_low = ((p[4] & 1) << 8) | p[5];
3090  return 0;
3091 }
3092 
3093 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3094 
3095  /* NOTE: We attempt to seek on non-seekable files as well, as the
3096  * probe buffer usually is big enough. Only warn if the seek failed
3097  * on files where the seek should work. */
3098  if (avio_seek(pb, pos, SEEK_SET) < 0)
3099  av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3100 }
3101 
3103 {
3104  MpegTSContext *ts = s->priv_data;
3105  AVIOContext *pb = s->pb;
3106  int64_t pos, probesize = s->probesize;
3107  int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3108 
3110 
3111  if (ffio_ensure_seekback(pb, seekback) < 0)
3112  av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3113 
3114  pos = avio_tell(pb);
3116  if (ts->raw_packet_size <= 0) {
3117  av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3119  }
3120  ts->stream = s;
3121  ts->auto_guess = 0;
3122 
3123  if (s->iformat == &ff_mpegts_demuxer) {
3124  /* normal demux */
3125 
3126  /* first do a scan to get all the services */
3127  seek_back(s, pb, pos);
3128 
3132 
3133  handle_packets(ts, probesize / ts->raw_packet_size);
3134  /* if could not find service, enable auto_guess */
3135 
3136  ts->auto_guess = 1;
3137 
3138  av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3139 
3140  s->ctx_flags |= AVFMTCTX_NOHEADER;
3141  } else {
3142  AVStream *st;
3143  int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3144  int64_t pcrs[2], pcr_h;
3145  uint8_t packet[TS_PACKET_SIZE];
3146  const uint8_t *data;
3147 
3148  /* only read packets */
3149 
3150  st = avformat_new_stream(s, NULL);
3151  if (!st)
3152  return AVERROR(ENOMEM);
3153  avpriv_set_pts_info(st, 60, 1, 27000000);
3156 
3157  /* we iterate until we find two PCRs to estimate the bitrate */
3158  pcr_pid = -1;
3159  nb_pcrs = 0;
3160  nb_packets = 0;
3161  for (;;) {
3163  if (ret < 0)
3164  return ret;
3165  pid = AV_RB16(data + 1) & 0x1fff;
3166  if ((pcr_pid == -1 || pcr_pid == pid) &&
3167  parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3169  pcr_pid = pid;
3170  pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3171  nb_pcrs++;
3172  if (nb_pcrs >= 2) {
3173  if (pcrs[1] - pcrs[0] > 0) {
3174  /* the difference needs to be positive to make sense for bitrate computation */
3175  break;
3176  } else {
3177  av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3178  pcrs[0] = pcrs[1];
3179  nb_pcrs--;
3180  }
3181  }
3182  } else {
3184  }
3185  nb_packets++;
3186  }
3187 
3188  /* NOTE1: the bitrate is computed without the FEC */
3189  /* NOTE2: it is only the bitrate of the start of the stream */
3190  ts->pcr_incr = pcrs[1] - pcrs[0];
3191  ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3192  s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3193  st->codecpar->bit_rate = s->bit_rate;
3194  st->start_time = ts->cur_pcr;
3195  av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3196  st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3197  }
3198 
3199  seek_back(s, pb, pos);
3200  return 0;
3201 }
3202 
3203 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3204 
3206 {
3207  MpegTSContext *ts = s->priv_data;
3208  int ret, i;
3209  int64_t pcr_h, next_pcr_h, pos;
3210  int pcr_l, next_pcr_l;
3211  uint8_t pcr_buf[12];
3212  const uint8_t *data;
3213 
3214  if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3215  return ret;
3217  pkt->pos = avio_tell(s->pb);
3218  if (ret < 0) {
3219  return ret;
3220  }
3221  if (data != pkt->data)
3222  memcpy(pkt->data, data, TS_PACKET_SIZE);
3224  if (ts->mpeg2ts_compute_pcr) {
3225  /* compute exact PCR for each packet */
3226  if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3227  /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3228  pos = avio_tell(s->pb);
3229  for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3230  avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3231  avio_read(s->pb, pcr_buf, 12);
3232  if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3233  /* XXX: not precise enough */
3234  ts->pcr_incr =
3235  ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3236  (i + 1);
3237  break;
3238  }
3239  }
3240  avio_seek(s->pb, pos, SEEK_SET);
3241  /* no next PCR found: we use previous increment */
3242  ts->cur_pcr = pcr_h * 300 + pcr_l;
3243  }
3244  pkt->pts = ts->cur_pcr;
3245  pkt->duration = ts->pcr_incr;
3246  ts->cur_pcr += ts->pcr_incr;
3247  }
3248  pkt->stream_index = 0;
3249  return 0;
3250 }
3251 
3253 {
3254  MpegTSContext *ts = s->priv_data;
3255  int ret, i;
3256 
3257  pkt->size = -1;
3258  ts->pkt = pkt;
3259  ret = handle_packets(ts, 0);
3260  if (ret < 0) {
3261  av_packet_unref(ts->pkt);
3262  /* flush pes data left */
3263  for (i = 0; i < NB_PID_MAX; i++)
3264  if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3265  PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3266  if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3267  ret = new_pes_packet(pes, pkt);
3268  if (ret < 0)
3269  return ret;
3270  pes->state = MPEGTS_SKIP;
3271  ret = 0;
3272  break;
3273  }
3274  }
3275  }
3276 
3277  if (!ret && pkt->size < 0)
3279  return ret;
3280 }
3281 
3282 static void mpegts_free(MpegTSContext *ts)
3283 {
3284  int i;
3285 
3286  clear_programs(ts);
3287 
3288  for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3289  av_buffer_pool_uninit(&ts->pools[i]);
3290 
3291  for (i = 0; i < NB_PID_MAX; i++)
3292  if (ts->pids[i])
3293  mpegts_close_filter(ts, ts->pids[i]);
3294 }
3295 
3297 {
3298  MpegTSContext *ts = s->priv_data;
3299  mpegts_free(ts);
3300  return 0;
3301 }
3302 
3303 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3304  int64_t *ppos, int64_t pos_limit)
3305 {
3306  MpegTSContext *ts = s->priv_data;
3307  int64_t pos, timestamp;
3308  uint8_t buf[TS_PACKET_SIZE];
3309  int pcr_l, pcr_pid =
3310  ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3311  int pos47 = ts->pos47_full % ts->raw_packet_size;
3312  pos =
3313  ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3314  ts->raw_packet_size + pos47;
3315  while(pos < pos_limit) {
3316  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3317  return AV_NOPTS_VALUE;
3318  if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3319  return AV_NOPTS_VALUE;
3320  if (buf[0] != 0x47) {
3321  if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3322  return AV_NOPTS_VALUE;
3323  pos = avio_tell(s->pb);
3324  continue;
3325  }
3326  if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3327  parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3328  *ppos = pos;
3329  return timestamp;
3330  }
3331  pos += ts->raw_packet_size;
3332  }
3333 
3334  return AV_NOPTS_VALUE;
3335 }
3336 
3337 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3338  int64_t *ppos, int64_t pos_limit)
3339 {
3340  MpegTSContext *ts = s->priv_data;
3341  AVPacket *pkt;
3342  int64_t pos;
3343  int pos47 = ts->pos47_full % ts->raw_packet_size;
3344  pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3346  if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3347  return AV_NOPTS_VALUE;
3348  pkt = av_packet_alloc();
3349  if (!pkt)
3350  return AV_NOPTS_VALUE;
3351  while(pos < pos_limit) {
3352  int ret = av_read_frame(s, pkt);
3353  if (ret < 0) {
3354  av_packet_free(&pkt);
3355  return AV_NOPTS_VALUE;
3356  }
3357  if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3359  av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3360  if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3361  int64_t dts = pkt->dts;
3362  *ppos = pkt->pos;
3363  av_packet_free(&pkt);
3364  return dts;
3365  }
3366  }
3367  pos = pkt->pos;
3369  }
3370 
3371  av_packet_free(&pkt);
3372  return AV_NOPTS_VALUE;
3373 }
3374 
3375 /**************************************************************/
3376 /* parsing functions - called from other demuxers such as RTP */
3377 
3379 {
3380  MpegTSContext *ts;
3381 
3382  ts = av_mallocz(sizeof(MpegTSContext));
3383  if (!ts)
3384  return NULL;
3385  /* no stream case, currently used by RTP */
3387  ts->max_packet_size = 2048000;
3388  ts->stream = s;
3389  ts->auto_guess = 1;
3390 
3394 
3395  return ts;
3396 }
3397 
3398 /* return the consumed length if a packet was output, or -1 if no
3399  * packet is output */
3401  const uint8_t *buf, int len)
3402 {
3403  int len1;
3404 
3405  len1 = len;
3406  ts->pkt = pkt;
3407  for (;;) {
3408  ts->stop_parse = 0;
3409  if (len < TS_PACKET_SIZE)
3410  return AVERROR_INVALIDDATA;
3411  if (buf[0] != 0x47) {
3412  buf++;
3413  len--;
3414  } else {
3415  handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3416  buf += TS_PACKET_SIZE;
3417  len -= TS_PACKET_SIZE;
3418  if (ts->stop_parse == 1)
3419  break;
3420  }
3421  }
3422  return len1 - len;
3423 }
3424 
3426 {
3427  mpegts_free(ts);
3428  av_free(ts);
3429 }
3430 
3432  .name = "mpegts",
3433  .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3434  .priv_data_size = sizeof(MpegTSContext),
3441  .priv_class = &mpegts_class,
3442 };
3443 
3445  .name = "mpegtsraw",
3446  .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3447  .priv_data_size = sizeof(MpegTSContext),
3453  .priv_class = &mpegtsraw_class,
3454 };
parse_MP4DecConfigDescrTag
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1556
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:912
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:423
parse_mp4_descr_arr
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1496
new_pes_packet
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
Definition: mpegts.c:1012
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:278
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:793
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
MP4DescrParseContext::descr_count
int descr_count
Definition: mpegts.c:1461
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:341
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:446
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:241
MpegTSFilter::discard
int discard
Definition: mpegts.c:105
Program::nb_streams
unsigned int nb_streams
Definition: mpegts.c:124
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:694
r
const char * r
Definition: vf_curves.c:126
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
MAX_LEVEL
#define MAX_LEVEL
Definition: mpegts.c:1455
AV_CODEC_ID_PCM_BLURAY
@ AV_CODEC_ID_PCM_BLURAY
Definition: codec_id.h:355
FFFormatContext::prefer_codec_framerate
int prefer_codec_framerate
Definition: internal.h:181
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:294
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AVFMT_SHOW_IDS
#define AVFMT_SHOW_IDS
Show format stream IDs numbers.
Definition: avformat.h:478
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:424
mpegts.h
AVProgram::nb_stream_indexes
unsigned int nb_stream_indexes
Definition: avformat.h:1044
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:2314
AVBufferPool
The buffer pool.
Definition: buffer_internal.h:88
MpegTSFilter::pid
int pid
Definition: mpegts.c:101
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:194
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:719
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:262
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
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:3400
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:35
avcodec_get_type
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
Definition: codec_desc.c:3761
AVStream::discard
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:912
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: avformat.c:339
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:559
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:168
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:128
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:266
PESContext::dts
int64_t dts
Definition: mpegts.c:267
METADATA_types
static const StreamType METADATA_types[]
Definition: mpegts.c:878
av_unused
#define av_unused
Definition: attributes.h:131
MP4DescrParseContext::max_descr_count
int max_descr_count
Definition: mpegts.c:1462
Stream::stream_identifier
int stream_identifier
Definition: mpegts.c:115
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: codec_id.h:64
MpegTSContext::skip_changes
int skip_changes
Definition: mpegts.c:160
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1183
ff_mp4_read_dec_config_descr
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:328
mpegts_find_stream_type
static void mpegts_find_stream_type(AVStream *st, uint32_t stream_type, const StreamType *types)
Definition: mpegts.c:894
MpegTSContext::auto_guess
int auto_guess
if true, all pids are analyzed to find streams
Definition: mpegts.c:141
AVPacket::data
uint8_t * data
Definition: packet.h:491
AV_CODEC_ID_DVB_TELETEXT
@ AV_CODEC_ID_DVB_TELETEXT
Definition: codec_id.h:559
clear_avprogram
static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:288
CHECK_BLOCK
#define CHECK_BLOCK
AVOption
AVOption.
Definition: opt.h:251
MpegTSSectionFilter
Definition: mpegts.c:87
MPEGTS_SECTION
@ MPEGTS_SECTION
Definition: mpegts.c:69
getstr8
static char * getstr8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:695
MpegTSSectionFilter::section_h_size
int section_h_size
Definition: mpegts.c:89
AV_CODEC_ID_AVS2
@ AV_CODEC_ID_AVS2
Definition: codec_id.h:246
data
const char data[16]
Definition: mxf.c:148
opus.h
MpegTSFilter::section_filter
MpegTSSectionFilter section_filter
Definition: mpegts.c:109
HLS_SAMPLE_ENC_types
static const StreamType HLS_SAMPLE_ENC_types[]
Definition: mpegts.c:852
MpegTSState
MpegTSState
Definition: mpegts.c:238
MP4SLDescrTag
#define MP4SLDescrTag
Definition: isom.h:343
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
MP4DescrParseContext::s
AVFormatContext * s
Definition: mpegts.c:1457
buffer_pool_get
static AVBufferRef * buffer_pool_get(MpegTSContext *ts, int size)
Definition: mpegts.c:1130
PES_HEADER_SIZE
#define PES_HEADER_SIZE
Definition: mpegts.c:248
fc
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:464
AVFormatContext::programs
AVProgram ** programs
Definition: avformat.h:1283
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:509
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
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
ffio_init_read_context
void ffio_init_read_context(FFIOContext *s, const uint8_t *buffer, int buffer_size)
Wrap a buffer in an AVIOContext for reading.
Definition: aviobuf.c:134
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:455
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
SetServiceCallback
void SetServiceCallback(void *opaque, int ret)
Definition: mpegts.c:85
av_read_frame
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: demux.c:1462
avcodec_is_open
int avcodec_is_open(AVCodecContext *s)
Definition: avcodec.c:708
AV_PROFILE_ARIB_PROFILE_C
#define AV_PROFILE_ARIB_PROFILE_C
Definition: defs.h:187
Stream::idx
int idx
Definition: mpegts.c:114
AV_CODEC_ID_HDMV_PGS_SUBTITLE
@ AV_CODEC_ID_HDMV_PGS_SUBTITLE
Definition: codec_id.h:558
ff_read_frame_flush
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: seek.c:720
add_pid_to_program
static void add_pid_to_program(struct Program *p, unsigned int pid)
Definition: mpegts.c:334
PESContext::pts
int64_t pts
Definition: mpegts.c:267
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: codec_id.h:487
FFIOContext
Definition: avio_internal.h:28
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:514
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:74
MpegTSContext::nb_prg
unsigned int nb_prg
structure to keep track of Program->pids mapping
Definition: mpegts.c:174
MpegTSPESFilter::pes_cb
PESCallback * pes_cb
Definition: mpegts.c:79
Program::streams
struct Stream streams[MAX_STREAMS_PER_PROGRAM]
Definition: mpegts.c:125
AV_CODEC_ID_BIN_DATA
@ AV_CODEC_ID_BIN_DATA
Definition: codec_id.h:592
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
PESContext::pcr_pid
int pcr_pid
if -1 then all packets containing PCR are considered
Definition: mpegts.c:253
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:708
SectionHeader::id
uint16_t id
Definition: mpegts.c:649
av_memdup
void * av_memdup(const void *p, size_t size)
Duplicate a buffer with av_malloc().
Definition: mem.c:302
SLConfigDescr::use_idle
int use_idle
Definition: mpegts.h:180
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:284
crc.h
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:381
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:464
PROBE_PACKET_MAX_BUF
#define PROBE_PACKET_MAX_BUF
Definition: mpegts.c:64
mpegtsraw_class
static const AVClass mpegtsraw_class
Definition: mpegts.c:229
AV_PROFILE_ARIB_PROFILE_A
#define AV_PROFILE_ARIB_PROFILE_A
Definition: defs.h:186
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:335
PESContext::state
enum MpegTSState state
Definition: mpegts.c:259
MpegTSFilter::pes_filter
MpegTSPESFilter pes_filter
Definition: mpegts.c:108
METADATA_DESCRIPTOR
#define METADATA_DESCRIPTOR
Definition: mpegts.h:164
SLConfigDescr::inst_bitrate_len
int inst_bitrate_len
Definition: mpegts.h:185
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: avformat.c:761
REGISTRATION_DESCRIPTOR
#define REGISTRATION_DESCRIPTOR
Definition: mpegts.h:159
mpegts_read_close
static int mpegts_read_close(AVFormatContext *s)
Definition: mpegts.c:3296
mpegts_raw_read_packet
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3205
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:2246
update_av_program_info
static void update_av_program_info(AVFormatContext *s, unsigned int programid, unsigned int pid, int version)
Definition: mpegts.c:350
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:420
MP4ODescrTag
#define MP4ODescrTag
Definition: isom.h:338
PESCallback
int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
Definition: mpegts.c:75
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:120
pat_cb
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2534
GetBitContext
Definition: get_bits.h:108
Program::nb_pids
unsigned int nb_pids
Definition: mpegts.c:122
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:1667
AVProgram::discard
enum AVDiscard discard
selects which program to discard and which to feed to the caller
Definition: avformat.h:1042
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
AV_DISPOSITION_STILL_IMAGE
#define AV_DISPOSITION_STILL_IMAGE
The video stream contains still images.
Definition: avformat.h:811
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:513
FFStream::avctx
struct AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:226
SectionHeader::last_sec_num
uint8_t last_sec_num
Definition: mpegts.c:653
val
static double val(void *priv, double ch)
Definition: aeval.c:78
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:339
MpegTSFilter::u
union MpegTSFilter::@315 u
PESContext::sl
SLConfigDescr sl
Definition: mpegts.c:271
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 *ac, int id)
Definition: avformat.c:281
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:444
PESContext::stream
AVFormatContext * stream
Definition: mpegts.c:256
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:553
PESContext::sub_st
AVStream * sub_st
stream for the embedded AC3 stream in HDMV TrueHD
Definition: mpegts.c:258
ff_mp4_parse_es_descr
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:303
SectionHeader::current_next
uint8_t current_next
Definition: mpegts.c:651
MpegTSContext::merge_pmt_versions
int merge_pmt_versions
Definition: mpegts.c:167
AV_DISPOSITION_CLEAN_EFFECTS
#define AV_DISPOSITION_CLEAN_EFFECTS
The audio stream contains music and sound effects without voice.
Definition: avformat.h:764
PESContext::header
uint8_t header[MAX_PES_HEADER_SIZE]
Definition: mpegts.c:269
avassert.h
MPEGTS_OPTIONS
#define MPEGTS_OPTIONS
Definition: mpegts.c:186
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:808
MpegTSContext::pos47_full
int64_t pos47_full
Definition: mpegts.c:138
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:3425
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:549
StreamType::codec_id
enum AVCodecID codec_id
Definition: mpegts.c:795
PESContext
Definition: mpegts.c:251
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:547
Mp4Descr::sl
SLConfigDescr sl
Definition: mpegts.h:195
AV_PROFILE_UNKNOWN
#define AV_PROFILE_UNKNOWN
Definition: defs.h:65
opus_coupled_stream_cnt
static const uint8_t opus_coupled_stream_cnt[9]
Definition: mpegts.c:1792
AVFormatContext::ctx_flags
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1164
AVProgram::id
int id
Definition: avformat.h:1040
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:1811
MpegTSContext::pools
AVBufferPool * pools[32]
Definition: mpegts.c:183
parse_pcr
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
Definition: mpegts.c:3067
AV_CODEC_ID_S302M
@ AV_CODEC_ID_S302M
Definition: codec_id.h:357
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:384
MpegTSContext::stream
AVFormatContext * stream
Definition: mpegts.c:134
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:600
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:98
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:3303
mpegts_class
static const AVClass mpegts_class
Definition: mpegts.c:210
AVFormatContext::nb_programs
unsigned int nb_programs
Definition: avformat.h:1282
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:554
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:454
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
bits
uint8_t bits
Definition: vp3data.h:128
SLConfigDescr::degr_prior_len
int degr_prior_len
Definition: mpegts.h:186
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
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:488
AVDOVIDecoderConfigurationRecord::dv_profile
uint8_t dv_profile
Definition: dovi_meta.h:55
PES_START_SIZE
#define PES_START_SIZE
Definition: mpegts.c:247
MpegTSContext::resync_size
int resync_size
Definition: mpegts.c:166
channels
channels
Definition: aptx.h:31
get_bits.h
SectionHeader::sec_num
uint8_t sec_num
Definition: mpegts.c:652
STREAM_ID_TYPE_E_STREAM
#define STREAM_ID_TYPE_E_STREAM
Definition: mpegts.h:152
nb_streams
static int nb_streams
Definition: ffprobe.c:328
PESContext::stream_type
int stream_type
Definition: mpegts.c:254
parse_MP4IODescrTag
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1507
PMT_TID
#define PMT_TID
Definition: mpegts.h:81
skip_identical
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
Definition: mpegts.c:656
opus_stream_cnt
static const uint8_t opus_stream_cnt[9]
Definition: mpegts.c:1796
AVCodecParameters::nb_coded_side_data
int nb_coded_side_data
Amount of entries in coded_side_data.
Definition: codec_par.h:231
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:79
AVDOVIDecoderConfigurationRecord::dv_version_major
uint8_t dv_version_major
Definition: dovi_meta.h:53
MPEGTS_SKIP
@ MPEGTS_SKIP
Definition: mpegts.c:243
MpegTSPESFilter::opaque
void * opaque
Definition: mpegts.c:80
get8
static int get8(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:667
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:380
AV_CODEC_ID_ARIB_CAPTION
@ AV_CODEC_ID_ARIB_CAPTION
Definition: codec_id.h:577
if
if(ret)
Definition: filter_design.txt:179
MpegTSContext::cur_pcr
int64_t cur_pcr
used to estimate the exact PCR
Definition: mpegts.c:149
clear_programs
static void clear_programs(MpegTSContext *ts)
Definition: mpegts.c:312
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:391
MP4ESDescrTag
#define MP4ESDescrTag
Definition: isom.h:340
AV_CODEC_ID_AVS3
@ AV_CODEC_ID_AVS3
Definition: codec_id.h:248
MP4DescrParseContext::active_descr
Mp4Descr * active_descr
Definition: mpegts.c:1460
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:219
AVFormatContext
Format I/O context.
Definition: avformat.h:1115
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:150
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:474
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:864
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
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:56
av_program_add_stream_index
void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
Definition: avformat.c:312
AVDOVIDecoderConfigurationRecord::dv_bl_signal_compatibility_id
uint8_t dv_bl_signal_compatibility_id
Definition: dovi_meta.h:60
MPEGTS_HEADER
@ MPEGTS_HEADER
Definition: mpegts.c:239
MpegTSSectionFilter::crc
unsigned crc
Definition: mpegts.c:91
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
MpegTSContext::stop_parse
int stop_parse
stop parsing loop
Definition: mpegts.c:154
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1066
isom.h
AV_CODEC_ID_TIMED_ID3
@ AV_CODEC_ID_TIMED_ID3
Definition: codec_id.h:591
MpegTSContext::current_pid
int current_pid
Definition: mpegts.c:180
MpegTSSectionFilter::section_index
int section_index
Definition: mpegts.c:88
MpegTSContext::last_pos
int64_t last_pos
to detect seek
Definition: mpegts.c:158
Mp4Descr::es_id
int es_id
Definition: mpegts.h:192
MpegTSFilter::es_id
int es_id
Definition: mpegts.c:102
MPEGTS_PESHEADER
@ MPEGTS_PESHEADER
Definition: mpegts.c:240
DESC_types
static const StreamType DESC_types[]
Definition: mpegts.c:885
PESContext::extended_stream_id
int extended_stream_id
Definition: mpegts.c:265
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:237
MpegTSSectionFilter::section_buf
uint8_t * section_buf
Definition: mpegts.c:93
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:388
eit_cb
static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2621
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:106
mpegts_open_pcr_filter
static MpegTSFilter * mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
Definition: mpegts.c:554
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:452
SectionHeader::version
uint8_t version
Definition: mpegts.c:650
seek_back
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos)
Definition: mpegts.c:3093
SLConfigDescr::ocr_len
int ocr_len
Definition: mpegts.h:183
AVProgram::stream_index
unsigned int * stream_index
Definition: avformat.h:1043
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:921
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:598
add_pes_stream
static PESContext * add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
Definition: mpegts.c:1431
MpegTSFilterType
MpegTSFilterType
Definition: mpegts.c:67
AV_DICT_DONT_OVERWRITE
#define AV_DICT_DONT_OVERWRITE
Don't overwrite existing entries.
Definition: dict.h:81
StreamType
Definition: mpegts.c:792
AV_CODEC_ID_SMPTE_KLV
@ AV_CODEC_ID_SMPTE_KLV
Definition: codec_id.h:589
ff_mp4_read_descr
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:294
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:511
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:538
PESContext::ts
MpegTSContext * ts
Definition: mpegts.c:255
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:1467
MAX_PES_HEADER_SIZE
#define MAX_PES_HEADER_SIZE
Definition: mpegts.c:249
MAX_PACKET_READAHEAD
#define MAX_PACKET_READAHEAD
Definition: mpegts.c:3203
MAX_PIDS_PER_PROGRAM
#define MAX_PIDS_PER_PROGRAM
Definition: mpegts.c:119
MpegTSSectionFilter::end_of_section_reached
unsigned int end_of_section_reached
Definition: mpegts.c:95
index
int index
Definition: gxfenc.c:89
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:1520
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:1143
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:1005
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:483
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:73
SDT_TID
#define SDT_TID
Definition: mpegts.h:87
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:445
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
SCTE_types
static const StreamType SCTE_types[]
Definition: mpegts.c:839
MPEGTS_PES
@ MPEGTS_PES
Definition: mpegts.c:68
f
f
Definition: af_crystalizer.c:121
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
AVMediaType
AVMediaType
Definition: avutil.h:199
MP4DescrParseContext::descr
Mp4Descr * descr
Definition: mpegts.c:1459
AVPacket::size
int size
Definition: packet.h:492
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:106
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:271
MpegTSContext::max_packet_size
int max_packet_size
Definition: mpegts.c:168
FFStream
Definition: internal.h:199
SectionHeader::tid
uint8_t tid
Definition: mpegts.c:648
reset_pes_packet_state
static void reset_pes_packet_state(PESContext *pes)
Definition: mpegts.c:996
FFIOContext::pub
AVIOContext pub
Definition: avio_internal.h:29
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: codec_id.h:447
Program
Definition: mpegts.c:120
MpegTSContext
Definition: mpegts.c:131
MpegTSFilter
Definition: mpegts.c:100
size
int size
Definition: twinvq_data.h:10344
MPEGTS_PAYLOAD
@ MPEGTS_PAYLOAD
Definition: mpegts.c:242
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:136
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:2963
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:216
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:94
MpegTSContext::skip_clear
int skip_clear
Definition: mpegts.c:161
AVCodecParameters::profile
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: codec_par.h:115
mpegts_get_dts
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: mpegts.c:3337
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:503
mpegts_read_packet
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpegts.c:3252
ff_find_stream_index
int ff_find_stream_index(const AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: demux_utils.c:371
parse_MP4ESDescrTag
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1534
buffer.h
AV_DISPOSITION_HEARING_IMPAIRED
#define AV_DISPOSITION_HEARING_IMPAIRED
The stream is intended for hearing impaired audiences.
Definition: avformat.h:756
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:490
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:650
av_reallocp_array
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate an array through a pointer to a pointer.
Definition: mem.c:223
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:1071
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:83
av_packet_side_data_add
AVPacketSideData * av_packet_side_data_add(AVPacketSideData **psd, int *pnb_sd, enum AVPacketSideDataType type, void *data, size_t size, int flags)
Wrap existing data as packet side data.
Definition: avpacket.c:693
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:337
PESContext::pid
int pid
Definition: mpegts.c:252
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:497
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:63
version
version
Definition: libkvazaar.c:321
FFStream::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: internal.h:388
handle_packet
static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
Definition: mpegts.c:2765
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:1486
get_bits64
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:453
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:2308
SectionHeader
Definition: mpegts.c:647
ISO_639_LANGUAGE_DESCRIPTOR
#define ISO_639_LANGUAGE_DESCRIPTOR
Definition: mpegts.h:160
MP4DescrParseContext::pb
FFIOContext pb
Definition: mpegts.c:1458
log.h
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:245
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:484
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:2272
MAX_MP4_DESCR_COUNT
#define MAX_MP4_DESCR_COUNT
Definition: mpegts.c:55
PESContext::data_index
int data_index
Definition: mpegts.c:261
AV_CODEC_ID_SMPTE_2038
@ AV_CODEC_ID_SMPTE_2038
Definition: codec_id.h:593
internal.h
get_program
static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:277
PAT_TID
#define PAT_TID
Definition: mpegts.h:79
ff_mpegts_demuxer
const AVInputFormat ff_mpegts_demuxer
Definition: mpegts.c:3431
MpegTSContext::pids
MpegTSFilter * pids[NB_PID_MAX]
filters for various streams specified by PMT + for the PAT and PMT
Definition: mpegts.c:179
PESContext::pes_header_size
int pes_header_size
Definition: mpegts.c:264
AV_CODEC_ID_CAVS
@ AV_CODEC_ID_CAVS
Definition: codec_id.h:139
get16
static int get16(const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:680
parse_section_header
static int parse_section_header(SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
Definition: mpegts.c:762
MpegTSContext::epg_stream
AVStream * epg_stream
Definition: mpegts.c:182
common.h
AV_CODEC_ID_EPG
@ AV_CODEC_ID_EPG
Definition: codec_id.h:584
packet
enum AVPacketSideDataType packet
Definition: decode.c:1425
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:226
xf
#define xf(width, name, var, range_min, range_max, subs,...)
Definition: cbs_av1.c:590
mpegts_resync
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
Definition: mpegts.c:2895
MpegTSContext::crc_validity
int8_t crc_validity[NB_PID_MAX]
Definition: mpegts.c:177
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:282
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
PESContext::st
AVStream * st
Definition: mpegts.c:257
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:254
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:216
AVProgram
New fields can be added to the end with minor version bumps.
Definition: avformat.h:1039
handle_packets
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
Definition: mpegts.c:2971
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: codec_id.h:122
demux.h
MpegTSContext::prg
struct Program * prg
Definition: mpegts.c:175
AV_DISPOSITION_DEPENDENT
#define AV_DISPOSITION_DEPENDENT
The audio stream is intended to be mixed with another stream before presentation.
Definition: avformat.h:807
len
int len
Definition: vorbis_enc_data.h:426
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:140
AV_CRC_32_IEEE
@ AV_CRC_32_IEEE
Definition: crc.h:52
MpegTSPESFilter
Definition: mpegts.c:78
AVCodecParameters::coded_side_data
AVPacketSideData * coded_side_data
Additional data associated with the entire stream.
Definition: codec_par.h:226
SLConfigDescr::au_len
int au_len
Definition: mpegts.h:184
avcodec.h
MpegTSFilter::last_pcr
int64_t last_pcr
Definition: mpegts.c:104
MpegTSSectionFilter::last_crc
unsigned last_crc
Definition: mpegts.c:92
language
Undefined Behavior In the C language
Definition: undefined.txt:3
AVStream::disposition
int disposition
Stream disposition - a combination of AV_DISPOSITION_* flags.
Definition: avformat.h:910
mid_pred
#define mid_pred
Definition: mathops.h:98
AV_DISPOSITION_VISUAL_IMPAIRED
#define AV_DISPOSITION_VISUAL_IMPAIRED
The stream is intended for visually impaired audiences.
Definition: avformat.h:760
MP4DescrParseContext
Definition: mpegts.c:1456
tag
uint32_t tag
Definition: movenc.c:1737
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:853
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:841
MpegTSSectionFilter::last_ver
int last_ver
Definition: mpegts.c:90
AVFormatContext::ts_id
int ts_id
Transport stream id.
Definition: avformat.h:1456
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:278
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:793
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:1683
scte_data_cb
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1763
pos
unsigned int pos
Definition: spdifenc.c:413
avformat.h
dovi_meta.h
m4sl_cb
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:1699
dict.h
AV_DISPOSITION_DESCRIPTIONS
#define AV_DISPOSITION_DESCRIPTIONS
The subtitle stream contains a textual description of the video content.
Definition: avformat.h:796
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:28
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:847
R8_CHECK_CLIP_MAX
#define R8_CHECK_CLIP_MAX(dst, maxv)
probe
static int probe(const AVProbeData *p)
Definition: act.c:38
mpegts_probe
static int mpegts_probe(const AVProbeData *p)
Definition: mpegts.c:3024
PESContext::PES_packet_length
int PES_packet_length
Definition: mpegts.c:263
AV_OPT_FLAG_EXPORT
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:289
clear_program
static void clear_program(struct Program *p)
Definition: mpegts.c:303
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
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:231
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
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
NB_PID_MAX
#define NB_PID_MAX
Definition: mpegts.h:32
AVDOVIDecoderConfigurationRecord::bl_present_flag
uint8_t bl_present_flag
Definition: dovi_meta.h:59
SL_DESCRIPTOR
#define SL_DESCRIPTOR
Definition: mpegts.h:162
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
defs.h
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:659
PESContext::stream_id
uint8_t stream_id
Definition: mpegts.c:266
parse_MP4SLDescrTag
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
Definition: mpegts.c:1570
avpriv_mpegts_parse_open
MpegTSContext * avpriv_mpegts_parse_open(AVFormatContext *s)
Definition: mpegts.c:3378
PESContext::buffer
AVBufferRef * buffer
Definition: mpegts.c:270
CHECK_COUNT
#define CHECK_COUNT
AVDOVIDecoderConfigurationRecord::rpu_present_flag
uint8_t rpu_present_flag
Definition: dovi_meta.h:57
mpegts_free
static void mpegts_free(MpegTSContext *ts)
Definition: mpegts.c:3282
HDMV_types
static const StreamType HDMV_types[]
Definition: mpegts.c:823
AVDOVIDecoderConfigurationRecord::el_present_flag
uint8_t el_present_flag
Definition: dovi_meta.h:58
AVPacket::stream_index
int stream_index
Definition: packet.h:493
AVPROBE_SCORE_STREAM_RETRY
#define AVPROBE_SCORE_STREAM_RETRY
Definition: avformat.h:460
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:365
SLConfigDescr::timestamp_res
int timestamp_res
Definition: mpegts.h:181
ISO_types
static const StreamType ISO_types[]
Definition: mpegts.c:798
AVDOVIDecoderConfigurationRecord::dv_version_minor
uint8_t dv_version_minor
Definition: dovi_meta.h:54
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:29
hex_dump_debug
#define hex_dump_debug(class, buf, size)
Definition: internal.h:39
read_sl_header
static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
Definition: mpegts.c:1059
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:482
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
MpegTSContext::pkt
AVPacket * pkt
packet containing Audio/Video data
Definition: mpegts.c:156
mpegts_read_header
static int mpegts_read_header(AVFormatContext *s)
Definition: mpegts.c:3102
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
MPEGTS_PCR
@ MPEGTS_PCR
Definition: mpegts.c:70
FFStream::request_probe
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:268
Program::id
unsigned int id
Definition: mpegts.c:121
STREAM_ID_ECM_STREAM
#define STREAM_ID_ECM_STREAM
Definition: mpegts.h:149
MpegTSSectionFilter::opaque
void * opaque
Definition: mpegts.c:97
PESContext::merged_st
int merged_st
Definition: mpegts.c:272
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
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:55
MAX_STREAMS_PER_PROGRAM
#define MAX_STREAMS_PER_PROGRAM
Definition: mpegts.c:118
AVPacket
This structure stores compressed data.
Definition: packet.h:468
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
STREAM_ID_PROGRAM_STREAM_DIRECTORY
#define STREAM_ID_PROGRAM_STREAM_DIRECTORY
Definition: mpegts.h:155
MpegTSFilter::last_cc
int last_cc
Definition: mpegts.c:103
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
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:88
MpegTSContext::scan_all_pmts
int scan_all_pmts
Definition: mpegts.c:164
AV_CODEC_ID_AC4
@ AV_CODEC_ID_AC4
Definition: codec_id.h:546
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:511
MP4DescrParseContext::predefined_SLConfigDescriptor_seen
int predefined_SLConfigDescriptor_seen
Definition: mpegts.c:1464
FFMAX3
#define FFMAX3(a, b, c)
Definition: macros.h:48
Stream
Definition: mpegts.c:113
d
d
Definition: ffmpeg_filter.c:368
MP4DescrParseContext::level
int level
Definition: mpegts.c:1463
bytestream.h
FFStream::stream_identifier
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: internal.h:404
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:691
MpegTSContext::skip_unknown_pmt
int skip_unknown_pmt
Definition: mpegts.c:162
raw_options
static const AVOption raw_options[]
Definition: mpegts.c:217
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:243
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
opus_channel_map
static const uint8_t opus_channel_map[8][8]
Definition: mpegts.c:1800
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:84
Program::pids
unsigned int pids[MAX_PIDS_PER_PROGRAM]
Definition: mpegts.c:123
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AV_CODEC_ID_AAC_LATM
@ AV_CODEC_ID_AAC_LATM
Definition: codec_id.h:492
ff_mpegtsraw_demuxer
const AVInputFormat ff_mpegtsraw_demuxer
Definition: mpegts.c:3444
parse_mp4_descr
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, int target_tag)
Definition: mpegts.c:1613
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:575
TS_PACKET_SIZE
#define TS_PACKET_SIZE
Definition: mpegts.h:29
MpegTSSectionFilter::section_cb
SectionCallback * section_cb
Definition: mpegts.c:96
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
PROBE_PACKET_MARGIN
#define PROBE_PACKET_MARGIN
Definition: mpegts.c:65
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:279
get_ts64
static uint64_t get_ts64(GetBitContext *gb, int bits)
Definition: mpegts.c:1052
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:609
analyze
static int analyze(const uint8_t *buf, int size, int packet_size, int probe)
Definition: mpegts.c:580
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:421
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:48
read_packet
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
Definition: mpegts.c:2938
MpegTSContext::mpeg2ts_compute_pcr
int mpeg2ts_compute_pcr
compute exact PCR for each transport stream packet
Definition: mpegts.c:144
REGD_types
static const StreamType REGD_types[]
Definition: mpegts.c:860
MISC_types
static const StreamType MISC_types[]
Definition: mpegts.c:845
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:54
add_program
static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
Definition: mpegts.c:318
options
static const AVOption options[]
Definition: mpegts.c:189
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:268
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
AVProgram::pcr_pid
int pcr_pid
Definition: avformat.h:1049
FFStream::pts_wrap_reference
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:325
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:731
skip
static void BS_FUNC() skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.
Definition: bitstream_template.h:375
sdt_cb
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
Definition: mpegts.c:2675
MpegTSContext::fix_teletext_pts
int fix_teletext_pts
fix dvb teletext pts
Definition: mpegts.c:147
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:239
AVDOVIDecoderConfigurationRecord
Definition: dovi_meta.h:52
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:393
AV_CODEC_ID_SCTE_35
@ AV_CODEC_ID_SCTE_35
Contain timestamp estimated through PCR of program stream.
Definition: codec_id.h:583
StreamType::codec_type
enum AVMediaType codec_type
Definition: mpegts.c:794