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flvdec.c
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1 /*
2  * FLV demuxer
3  * Copyright (c) 2003 The FFmpeg Project
4  *
5  * This demuxer will generate a 1 byte extradata for VP6F content.
6  * It is composed of:
7  * - upper 4 bits: difference between encoded width and visible width
8  * - lower 4 bits: difference between encoded height and visible height
9  *
10  * This file is part of FFmpeg.
11  *
12  * FFmpeg is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * FFmpeg is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with FFmpeg; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include "libavutil/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/intfloat.h"
32 #include "libavutil/mathematics.h"
33 #include "libavcodec/bytestream.h"
34 #include "libavcodec/mpeg4audio.h"
35 #include "avformat.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "flv.h"
39 
40 #define VALIDATE_INDEX_TS_THRESH 2500
41 
42 #define RESYNC_BUFFER_SIZE (1<<20)
43 
44 typedef struct FLVContext {
45  const AVClass *class; ///< Class for private options.
46  int trust_metadata; ///< configure streams according onMetaData
47  int trust_datasize; ///< trust data size of FLVTag
48  int dump_full_metadata; ///< Dump full metadata of the onMetadata
49  int wrong_dts; ///< wrong dts due to negative cts
54  struct {
55  int64_t dts;
56  int64_t pos;
57  } validate_index[2];
61 
63 
66 
69  int64_t video_bit_rate;
70  int64_t audio_bit_rate;
71  int64_t *keyframe_times;
75 } FLVContext;
76 
77 static int probe(AVProbeData *p, int live)
78 {
79  const uint8_t *d = p->buf;
80  unsigned offset = AV_RB32(d + 5);
81 
82  if (d[0] == 'F' &&
83  d[1] == 'L' &&
84  d[2] == 'V' &&
85  d[3] < 5 && d[5] == 0 &&
86  offset + 100 < p->buf_size &&
87  offset > 8) {
88  int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
89 
90  if (live == is_live)
91  return AVPROBE_SCORE_MAX;
92  }
93  return 0;
94 }
95 
96 static int flv_probe(AVProbeData *p)
97 {
98  return probe(p, 0);
99 }
100 
102 {
103  return probe(p, 1);
104 }
105 
107 {
108  FLVContext *flv = s->priv_data;
109  AVStream *stream = NULL;
110  unsigned int i = 0;
111 
112  if (flv->last_keyframe_stream_index < 0) {
113  av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
114  return;
115  }
116 
118  stream = s->streams[flv->last_keyframe_stream_index];
119 
120  if (stream->nb_index_entries == 0) {
121  for (i = 0; i < flv->keyframe_count; i++) {
122  av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
123  flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000);
125  flv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME);
126  }
127  } else
128  av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
129 
130  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
131  av_freep(&flv->keyframe_times);
133  flv->keyframe_count = 0;
134  }
135 }
136 
138 {
139  FLVContext *flv = s->priv_data;
141  if (!st)
142  return NULL;
144  if (s->nb_streams>=3 ||( s->nb_streams==2
148  if (codec_type == AVMEDIA_TYPE_AUDIO) {
149  st->codecpar->bit_rate = flv->audio_bit_rate;
151  }
152  if (codec_type == AVMEDIA_TYPE_VIDEO) {
153  st->codecpar->bit_rate = flv->video_bit_rate;
155  st->avg_frame_rate = flv->framerate;
156  }
157 
158 
159  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
162  return st;
163 }
164 
166 {
167  int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
168  int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
169  int codec_id;
170 
171  if (!apar->codec_id && !apar->codec_tag)
172  return 1;
173 
174  if (apar->bits_per_coded_sample != bits_per_coded_sample)
175  return 0;
176 
177  switch (flv_codecid) {
178  // no distinction between S16 and S8 PCM codec flags
179  case FLV_CODECID_PCM:
180  codec_id = bits_per_coded_sample == 8
182 #if HAVE_BIGENDIAN
184 #else
186 #endif
187  return codec_id == apar->codec_id;
188  case FLV_CODECID_PCM_LE:
189  codec_id = bits_per_coded_sample == 8
192  return codec_id == apar->codec_id;
193  case FLV_CODECID_AAC:
194  return apar->codec_id == AV_CODEC_ID_AAC;
195  case FLV_CODECID_ADPCM:
196  return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
197  case FLV_CODECID_SPEEX:
198  return apar->codec_id == AV_CODEC_ID_SPEEX;
199  case FLV_CODECID_MP3:
200  return apar->codec_id == AV_CODEC_ID_MP3;
204  return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
206  return apar->sample_rate == 8000 &&
209  return apar->sample_rate == 8000 &&
211  default:
212  return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
213  }
214 }
215 
217  AVCodecParameters *apar, int flv_codecid)
218 {
219  switch (flv_codecid) {
220  // no distinction between S16 and S8 PCM codec flags
221  case FLV_CODECID_PCM:
222  apar->codec_id = apar->bits_per_coded_sample == 8
224 #if HAVE_BIGENDIAN
226 #else
228 #endif
229  break;
230  case FLV_CODECID_PCM_LE:
231  apar->codec_id = apar->bits_per_coded_sample == 8
234  break;
235  case FLV_CODECID_AAC:
236  apar->codec_id = AV_CODEC_ID_AAC;
237  break;
238  case FLV_CODECID_ADPCM:
240  break;
241  case FLV_CODECID_SPEEX:
242  apar->codec_id = AV_CODEC_ID_SPEEX;
243  apar->sample_rate = 16000;
244  break;
245  case FLV_CODECID_MP3:
246  apar->codec_id = AV_CODEC_ID_MP3;
248  break;
250  // in case metadata does not otherwise declare samplerate
251  apar->sample_rate = 8000;
253  break;
255  apar->sample_rate = 16000;
257  break;
260  break;
262  apar->sample_rate = 8000;
264  break;
266  apar->sample_rate = 8000;
268  break;
269  default:
270  avpriv_request_sample(s, "Audio codec (%x)",
271  flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
272  apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
273  }
274 }
275 
277 {
278  int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
279 
280  if (!vpar->codec_id && !vpar->codec_tag)
281  return 1;
282 
283  switch (flv_codecid) {
284  case FLV_CODECID_H263:
285  return vpar->codec_id == AV_CODEC_ID_FLV1;
286  case FLV_CODECID_SCREEN:
287  return vpar->codec_id == AV_CODEC_ID_FLASHSV;
288  case FLV_CODECID_SCREEN2:
289  return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
290  case FLV_CODECID_VP6:
291  return vpar->codec_id == AV_CODEC_ID_VP6F;
292  case FLV_CODECID_VP6A:
293  return vpar->codec_id == AV_CODEC_ID_VP6A;
294  case FLV_CODECID_H264:
295  return vpar->codec_id == AV_CODEC_ID_H264;
296  default:
297  return vpar->codec_tag == flv_codecid;
298  }
299 }
300 
302  int flv_codecid, int read)
303 {
304  int ret = 0;
305  AVCodecParameters *par = vstream->codecpar;
306  enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
307  switch (flv_codecid) {
308  case FLV_CODECID_H263:
309  par->codec_id = AV_CODEC_ID_FLV1;
310  break;
312  par->codec_id = AV_CODEC_ID_H263;
313  break; // Really mean it this time
314  case FLV_CODECID_SCREEN:
316  break;
317  case FLV_CODECID_SCREEN2:
319  break;
320  case FLV_CODECID_VP6:
321  par->codec_id = AV_CODEC_ID_VP6F;
322  case FLV_CODECID_VP6A:
323  if (flv_codecid == FLV_CODECID_VP6A)
324  par->codec_id = AV_CODEC_ID_VP6A;
325  if (read) {
326  if (par->extradata_size != 1) {
327  ff_alloc_extradata(par, 1);
328  }
329  if (par->extradata)
330  par->extradata[0] = avio_r8(s->pb);
331  else
332  avio_skip(s->pb, 1);
333  }
334  ret = 1; // 1 byte body size adjustment for flv_read_packet()
335  break;
336  case FLV_CODECID_H264:
337  par->codec_id = AV_CODEC_ID_H264;
339  ret = 3; // not 4, reading packet type will consume one byte
340  break;
341  case FLV_CODECID_MPEG4:
343  ret = 3;
344  break;
345  default:
346  avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
347  par->codec_tag = flv_codecid;
348  }
349 
350  if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
351  avpriv_request_sample(s, "Changing the codec id midstream");
352  return AVERROR_PATCHWELCOME;
353  }
354 
355  return ret;
356 }
357 
358 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
359 {
360  int length = avio_rb16(ioc);
361  if (length >= buffsize) {
362  avio_skip(ioc, length);
363  return -1;
364  }
365 
366  avio_read(ioc, buffer, length);
367 
368  buffer[length] = '\0';
369 
370  return length;
371 }
372 
374 {
375  FLVContext *flv = s->priv_data;
376  unsigned int timeslen = 0, fileposlen = 0, i;
377  char str_val[256];
378  int64_t *times = NULL;
379  int64_t *filepositions = NULL;
380  int ret = AVERROR(ENOSYS);
381  int64_t initial_pos = avio_tell(ioc);
382 
383  if (flv->keyframe_count > 0) {
384  av_log(s, AV_LOG_DEBUG, "keyframes have been paresed\n");
385  return 0;
386  }
387  av_assert0(!flv->keyframe_times);
389 
390  if (s->flags & AVFMT_FLAG_IGNIDX)
391  return 0;
392 
393  while (avio_tell(ioc) < max_pos - 2 &&
394  amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
395  int64_t **current_array;
396  unsigned int arraylen;
397 
398  // Expect array object in context
399  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
400  break;
401 
402  arraylen = avio_rb32(ioc);
403  if (arraylen>>28)
404  break;
405 
406  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
407  current_array = &times;
408  timeslen = arraylen;
409  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
410  !filepositions) {
411  current_array = &filepositions;
412  fileposlen = arraylen;
413  } else
414  // unexpected metatag inside keyframes, will not use such
415  // metadata for indexing
416  break;
417 
418  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
419  ret = AVERROR(ENOMEM);
420  goto finish;
421  }
422 
423  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
424  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
425  goto invalid;
426  current_array[0][i] = av_int2double(avio_rb64(ioc));
427  }
428  if (times && filepositions) {
429  // All done, exiting at a position allowing amf_parse_object
430  // to finish parsing the object
431  ret = 0;
432  break;
433  }
434  }
435 
436  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
437  for (i = 0; i < FFMIN(2,fileposlen); i++) {
438  flv->validate_index[i].pos = filepositions[i];
439  flv->validate_index[i].dts = times[i] * 1000;
440  flv->validate_count = i + 1;
441  }
442  flv->keyframe_times = times;
443  flv->keyframe_filepositions = filepositions;
444  flv->keyframe_count = timeslen;
445  times = NULL;
446  filepositions = NULL;
447  } else {
448 invalid:
449  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
450  }
451 
452 finish:
453  av_freep(&times);
454  av_freep(&filepositions);
455  avio_seek(ioc, initial_pos, SEEK_SET);
456  return ret;
457 }
458 
460  AVStream *vstream, const char *key,
461  int64_t max_pos, int depth)
462 {
463  AVCodecParameters *apar, *vpar;
464  FLVContext *flv = s->priv_data;
465  AVIOContext *ioc;
466  AMFDataType amf_type;
467  char str_val[1024];
468  double num_val;
469 
470  num_val = 0;
471  ioc = s->pb;
472  amf_type = avio_r8(ioc);
473 
474  switch (amf_type) {
476  num_val = av_int2double(avio_rb64(ioc));
477  break;
478  case AMF_DATA_TYPE_BOOL:
479  num_val = avio_r8(ioc);
480  break;
482  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
483  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
484  return -1;
485  }
486  break;
488  if (key &&
489  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
490  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
491  if (parse_keyframes_index(s, ioc,
492  max_pos) < 0)
493  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
494  else
496  while (avio_tell(ioc) < max_pos - 2 &&
497  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
498  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
499  depth + 1) < 0)
500  return -1; // if we couldn't skip, bomb out.
501  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
502  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
503  return -1;
504  }
505  break;
506  case AMF_DATA_TYPE_NULL:
509  break; // these take up no additional space
511  {
512  unsigned v;
513  avio_skip(ioc, 4); // skip 32-bit max array index
514  while (avio_tell(ioc) < max_pos - 2 &&
515  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
516  // this is the only case in which we would want a nested
517  // parse to not skip over the object
518  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
519  depth + 1) < 0)
520  return -1;
521  v = avio_r8(ioc);
522  if (v != AMF_END_OF_OBJECT) {
523  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
524  return -1;
525  }
526  break;
527  }
528  case AMF_DATA_TYPE_ARRAY:
529  {
530  unsigned int arraylen, i;
531 
532  arraylen = avio_rb32(ioc);
533  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
534  if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
535  depth + 1) < 0)
536  return -1; // if we couldn't skip, bomb out.
537  }
538  break;
539  case AMF_DATA_TYPE_DATE:
540  avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16)
541  break;
542  default: // unsupported type, we couldn't skip
543  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
544  return -1;
545  }
546 
547  if (key) {
548  apar = astream ? astream->codecpar : NULL;
549  vpar = vstream ? vstream->codecpar : NULL;
550 
551  // stream info doesn't live any deeper than the first object
552  if (depth == 1) {
553  if (amf_type == AMF_DATA_TYPE_NUMBER ||
554  amf_type == AMF_DATA_TYPE_BOOL) {
555  if (!strcmp(key, "duration"))
556  s->duration = num_val * AV_TIME_BASE;
557  else if (!strcmp(key, "videodatarate") &&
558  0 <= (int)(num_val * 1024.0))
559  flv->video_bit_rate = num_val * 1024.0;
560  else if (!strcmp(key, "audiodatarate") &&
561  0 <= (int)(num_val * 1024.0))
562  flv->audio_bit_rate = num_val * 1024.0;
563  else if (!strcmp(key, "datastream")) {
565  if (!st)
566  return AVERROR(ENOMEM);
568  } else if (!strcmp(key, "framerate")) {
569  flv->framerate = av_d2q(num_val, 1000);
570  if (vstream)
571  vstream->avg_frame_rate = flv->framerate;
572  } else if (flv->trust_metadata) {
573  if (!strcmp(key, "videocodecid") && vpar) {
574  int ret = flv_set_video_codec(s, vstream, num_val, 0);
575  if (ret < 0)
576  return ret;
577  } else if (!strcmp(key, "audiocodecid") && apar) {
578  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
579  flv_set_audio_codec(s, astream, apar, id);
580  } else if (!strcmp(key, "audiosamplerate") && apar) {
581  apar->sample_rate = num_val;
582  } else if (!strcmp(key, "audiosamplesize") && apar) {
583  apar->bits_per_coded_sample = num_val;
584  } else if (!strcmp(key, "stereo") && apar) {
585  apar->channels = num_val + 1;
586  apar->channel_layout = apar->channels == 2 ?
589  } else if (!strcmp(key, "width") && vpar) {
590  vpar->width = num_val;
591  } else if (!strcmp(key, "height") && vpar) {
592  vpar->height = num_val;
593  }
594  }
595  }
596  if (amf_type == AMF_DATA_TYPE_STRING) {
597  if (!strcmp(key, "encoder")) {
598  int version = -1;
599  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
600  if (version > 0 && version <= 655)
601  flv->broken_sizes = 1;
602  }
603  } else if (!strcmp(key, "metadatacreator")) {
604  if ( !strcmp (str_val, "MEGA")
605  || !strncmp(str_val, "FlixEngine", 10))
606  flv->broken_sizes = 1;
607  }
608  }
609  }
610 
611  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
612  ((!apar && !strcmp(key, "audiocodecid")) ||
613  (!vpar && !strcmp(key, "videocodecid"))))
614  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
615 
616  if ((!strcmp(key, "duration") ||
617  !strcmp(key, "filesize") ||
618  !strcmp(key, "width") ||
619  !strcmp(key, "height") ||
620  !strcmp(key, "videodatarate") ||
621  !strcmp(key, "framerate") ||
622  !strcmp(key, "videocodecid") ||
623  !strcmp(key, "audiodatarate") ||
624  !strcmp(key, "audiosamplerate") ||
625  !strcmp(key, "audiosamplesize") ||
626  !strcmp(key, "stereo") ||
627  !strcmp(key, "audiocodecid") ||
628  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
629  return 0;
630 
632  if (amf_type == AMF_DATA_TYPE_BOOL) {
633  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
634  sizeof(str_val));
635  av_dict_set(&s->metadata, key, str_val, 0);
636  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
637  snprintf(str_val, sizeof(str_val), "%.f", num_val);
638  av_dict_set(&s->metadata, key, str_val, 0);
639  } else if (amf_type == AMF_DATA_TYPE_STRING)
640  av_dict_set(&s->metadata, key, str_val, 0);
641  }
642 
643  return 0;
644 }
645 
646 #define TYPE_ONTEXTDATA 1
647 #define TYPE_ONCAPTION 2
648 #define TYPE_ONCAPTIONINFO 3
649 #define TYPE_UNKNOWN 9
650 
651 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
652 {
653  FLVContext *flv = s->priv_data;
655  AVStream *stream, *astream, *vstream;
656  AVStream av_unused *dstream;
657  AVIOContext *ioc;
658  int i;
659  char buffer[32];
660 
661  astream = NULL;
662  vstream = NULL;
663  dstream = NULL;
664  ioc = s->pb;
665 
666  // first object needs to be "onMetaData" string
667  type = avio_r8(ioc);
668  if (type != AMF_DATA_TYPE_STRING ||
669  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
670  return TYPE_UNKNOWN;
671 
672  if (!strcmp(buffer, "onTextData"))
673  return TYPE_ONTEXTDATA;
674 
675  if (!strcmp(buffer, "onCaption"))
676  return TYPE_ONCAPTION;
677 
678  if (!strcmp(buffer, "onCaptionInfo"))
679  return TYPE_ONCAPTIONINFO;
680 
681  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
682  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
683  return TYPE_UNKNOWN;
684  }
685 
686  // find the streams now so that amf_parse_object doesn't need to do
687  // the lookup every time it is called.
688  for (i = 0; i < s->nb_streams; i++) {
689  stream = s->streams[i];
690  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
691  vstream = stream;
693  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
694  astream = stream;
695  if (flv->last_keyframe_stream_index == -1)
697  }
698  else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
699  dstream = stream;
700  }
701 
702  // parse the second object (we want a mixed array)
703  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
704  return -1;
705 
706  return 0;
707 }
708 
710 {
711  int flags;
712  FLVContext *flv = s->priv_data;
713  int offset;
714  int pre_tag_size = 0;
715 
716  avio_skip(s->pb, 4);
717  flags = avio_r8(s->pb);
718 
720 
722 
723  offset = avio_rb32(s->pb);
724  avio_seek(s->pb, offset, SEEK_SET);
725 
726  /* Annex E. The FLV File Format
727  * E.3 TheFLVFileBody
728  * Field Type Comment
729  * PreviousTagSize0 UI32 Always 0
730  * */
731  pre_tag_size = avio_rb32(s->pb);
732  if (pre_tag_size) {
733  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
734  }
735 
736  s->start_time = 0;
737  flv->sum_flv_tag_size = 0;
738  flv->last_keyframe_stream_index = -1;
739 
740  return 0;
741 }
742 
744 {
745  int i;
746  FLVContext *flv = s->priv_data;
747  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
748  av_freep(&flv->new_extradata[i]);
749  av_freep(&flv->keyframe_times);
751  return 0;
752 }
753 
755 {
756  if (!size)
757  return 0;
758 
759  av_freep(&st->codecpar->extradata);
760  if (ff_get_extradata(s, st->codecpar, s->pb, size) < 0)
761  return AVERROR(ENOMEM);
762  st->internal->need_context_update = 1;
763  return 0;
764 }
765 
766 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
767  int size)
768 {
769  if (!size)
770  return 0;
771 
772  av_free(flv->new_extradata[stream]);
773  flv->new_extradata[stream] = av_mallocz(size +
775  if (!flv->new_extradata[stream])
776  return AVERROR(ENOMEM);
777  flv->new_extradata_size[stream] = size;
778  avio_read(pb, flv->new_extradata[stream], size);
779  return 0;
780 }
781 
782 static void clear_index_entries(AVFormatContext *s, int64_t pos)
783 {
784  int i, j, out;
786  "Found invalid index entries, clearing the index.\n");
787  for (i = 0; i < s->nb_streams; i++) {
788  AVStream *st = s->streams[i];
789  /* Remove all index entries that point to >= pos */
790  out = 0;
791  for (j = 0; j < st->nb_index_entries; j++)
792  if (st->index_entries[j].pos < pos)
793  st->index_entries[out++] = st->index_entries[j];
794  st->nb_index_entries = out;
795  }
796 }
797 
799 {
800  int nb = -1, ret, parse_name = 1;
801 
802  switch (type) {
804  avio_skip(pb, 8);
805  break;
806  case AMF_DATA_TYPE_BOOL:
807  avio_skip(pb, 1);
808  break;
810  avio_skip(pb, avio_rb16(pb));
811  break;
812  case AMF_DATA_TYPE_ARRAY:
813  parse_name = 0;
815  nb = avio_rb32(pb);
817  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
818  if (parse_name) {
819  int size = avio_rb16(pb);
820  if (!size) {
821  avio_skip(pb, 1);
822  break;
823  }
824  avio_skip(pb, size);
825  }
826  if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
827  return ret;
828  }
829  break;
830  case AMF_DATA_TYPE_NULL:
832  break;
833  default:
834  return AVERROR_INVALIDDATA;
835  }
836  return 0;
837 }
838 
840  int64_t dts, int64_t next)
841 {
842  AVIOContext *pb = s->pb;
843  AVStream *st = NULL;
844  char buf[20];
845  int ret = AVERROR_INVALIDDATA;
846  int i, length = -1;
847  int array = 0;
848 
849  switch (avio_r8(pb)) {
850  case AMF_DATA_TYPE_ARRAY:
851  array = 1;
853  avio_seek(pb, 4, SEEK_CUR);
855  break;
856  default:
857  goto skip;
858  }
859 
860  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
861  AMFDataType type = avio_r8(pb);
862  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
863  length = avio_rb16(pb);
864  ret = av_get_packet(pb, pkt, length);
865  if (ret < 0)
866  goto skip;
867  else
868  break;
869  } else {
870  if ((ret = amf_skip_tag(pb, type)) < 0)
871  goto skip;
872  }
873  }
874 
875  if (length < 0) {
876  ret = AVERROR_INVALIDDATA;
877  goto skip;
878  }
879 
880  for (i = 0; i < s->nb_streams; i++) {
881  st = s->streams[i];
883  break;
884  }
885 
886  if (i == s->nb_streams) {
888  if (!st)
889  return AVERROR(ENOMEM);
891  }
892 
893  pkt->dts = dts;
894  pkt->pts = dts;
895  pkt->size = ret;
896 
897  pkt->stream_index = st->index;
898  pkt->flags |= AV_PKT_FLAG_KEY;
899 
900 skip:
901  avio_seek(s->pb, next + 4, SEEK_SET);
902 
903  return ret;
904 }
905 
907 {
908  FLVContext *flv = s->priv_data;
909  int64_t i;
910  int64_t pos = avio_tell(s->pb);
911 
912  for (i=0; !avio_feof(s->pb); i++) {
913  int j = i & (RESYNC_BUFFER_SIZE-1);
914  int j1 = j + RESYNC_BUFFER_SIZE;
915  flv->resync_buffer[j ] =
916  flv->resync_buffer[j1] = avio_r8(s->pb);
917 
918  if (i > 22) {
919  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
920  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
921  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
922  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
923  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
924  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
925  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
926  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
927  return 1;
928  }
929  }
930  }
931  }
932  }
933  return AVERROR_EOF;
934 }
935 
937 {
938  FLVContext *flv = s->priv_data;
939  int ret, i, size, flags;
940  enum FlvTagType type;
941  int stream_type=-1;
942  int64_t next, pos, meta_pos;
943  int64_t dts, pts = AV_NOPTS_VALUE;
944  int av_uninit(channels);
945  int av_uninit(sample_rate);
946  AVStream *st = NULL;
947  int last = -1;
948  int orig_size;
949 
950 retry:
951  /* pkt size is repeated at end. skip it */
952  pos = avio_tell(s->pb);
953  type = (avio_r8(s->pb) & 0x1F);
954  orig_size =
955  size = avio_rb24(s->pb);
956  flv->sum_flv_tag_size += size + 11;
957  dts = avio_rb24(s->pb);
958  dts |= (unsigned)avio_r8(s->pb) << 24;
959  av_log(s, AV_LOG_TRACE, "type:%d, size:%d, last:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, last, dts, avio_tell(s->pb));
960  if (avio_feof(s->pb))
961  return AVERROR_EOF;
962  avio_skip(s->pb, 3); /* stream id, always 0 */
963  flags = 0;
964 
965  if (flv->validate_next < flv->validate_count) {
966  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
967  if (pos == validate_pos) {
968  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
970  flv->validate_next++;
971  } else {
972  clear_index_entries(s, validate_pos);
973  flv->validate_count = 0;
974  }
975  } else if (pos > validate_pos) {
976  clear_index_entries(s, validate_pos);
977  flv->validate_count = 0;
978  }
979  }
980 
981  if (size == 0) {
982  ret = FFERROR_REDO;
983  goto leave;
984  }
985 
986  next = size + avio_tell(s->pb);
987 
988  if (type == FLV_TAG_TYPE_AUDIO) {
989  stream_type = FLV_STREAM_TYPE_AUDIO;
990  flags = avio_r8(s->pb);
991  size--;
992  } else if (type == FLV_TAG_TYPE_VIDEO) {
993  stream_type = FLV_STREAM_TYPE_VIDEO;
994  flags = avio_r8(s->pb);
995  size--;
997  goto skip;
998  } else if (type == FLV_TAG_TYPE_META) {
999  stream_type=FLV_STREAM_TYPE_DATA;
1000  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1001  int type;
1002  meta_pos = avio_tell(s->pb);
1003  type = flv_read_metabody(s, next);
1004  if (type == 0 && dts == 0 || type < 0 || type == TYPE_UNKNOWN) {
1005  if (type < 0 && flv->validate_count &&
1006  flv->validate_index[0].pos > next &&
1007  flv->validate_index[0].pos - 4 < next
1008  ) {
1009  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1010  next = flv->validate_index[0].pos - 4;
1011  }
1012  goto skip;
1013  } else if (type == TYPE_ONTEXTDATA) {
1014  avpriv_request_sample(s, "OnTextData packet");
1015  return flv_data_packet(s, pkt, dts, next);
1016  } else if (type == TYPE_ONCAPTION) {
1017  return flv_data_packet(s, pkt, dts, next);
1018  }
1019  avio_seek(s->pb, meta_pos, SEEK_SET);
1020  }
1021  } else {
1022  av_log(s, AV_LOG_DEBUG,
1023  "Skipping flv packet: type %d, size %d, flags %d.\n",
1024  type, size, flags);
1025 skip:
1026  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1027  // This can happen if flv_read_metabody above read past
1028  // next, on a non-seekable input, and the preceding data has
1029  // been flushed out from the IO buffer.
1030  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1031  return AVERROR_INVALIDDATA;
1032  }
1033  ret = FFERROR_REDO;
1034  goto leave;
1035  }
1036 
1037  /* skip empty data packets */
1038  if (!size) {
1039  ret = FFERROR_REDO;
1040  goto leave;
1041  }
1042 
1043  /* now find stream */
1044  for (i = 0; i < s->nb_streams; i++) {
1045  st = s->streams[i];
1046  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1047  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1048  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1049  break;
1050  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1051  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1052  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1053  break;
1054  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1056  break;
1057  }
1058  }
1059  if (i == s->nb_streams) {
1060  static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_SUBTITLE};
1061  st = create_stream(s, stream_types[stream_type]);
1062  if (!st)
1063  return AVERROR(ENOMEM);
1064 
1065  }
1066  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1067 
1068  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1069  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
1070  stream_type == FLV_STREAM_TYPE_AUDIO))
1071  av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
1072 
1073  if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
1074  ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
1075  || st->discard >= AVDISCARD_ALL
1076  ) {
1077  avio_seek(s->pb, next, SEEK_SET);
1078  ret = FFERROR_REDO;
1079  goto leave;
1080  }
1081 
1082  // if not streamed and no duration from metadata then seek to end to find
1083  // the duration from the timestamps
1084  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1085  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1086  !flv->searched_for_end) {
1087  int size;
1088  const int64_t pos = avio_tell(s->pb);
1089  // Read the last 4 bytes of the file, this should be the size of the
1090  // previous FLV tag. Use the timestamp of its payload as duration.
1091  int64_t fsize = avio_size(s->pb);
1092 retry_duration:
1093  avio_seek(s->pb, fsize - 4, SEEK_SET);
1094  size = avio_rb32(s->pb);
1095  if (size > 0 && size < fsize) {
1096  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1097  // but skip the byte indicating the type.
1098  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1099  if (size == avio_rb24(s->pb) + 11) {
1100  uint32_t ts = avio_rb24(s->pb);
1101  ts |= avio_r8(s->pb) << 24;
1102  if (ts)
1103  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1104  else if (fsize >= 8 && fsize - 8 >= size) {
1105  fsize -= size+4;
1106  goto retry_duration;
1107  }
1108  }
1109  }
1110 
1111  avio_seek(s->pb, pos, SEEK_SET);
1112  flv->searched_for_end = 1;
1113  }
1114 
1115  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1116  int bits_per_coded_sample;
1117  channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
1118  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1120  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1121  if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1123  st->codecpar->channels = channels;
1124  st->codecpar->channel_layout = channels == 1
1128  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1129  }
1130  if (!st->codecpar->codec_id) {
1131  flv_set_audio_codec(s, st, st->codecpar,
1132  flags & FLV_AUDIO_CODECID_MASK);
1133  flv->last_sample_rate =
1135  flv->last_channels =
1136  channels = st->codecpar->channels;
1137  } else {
1139  if (!par) {
1140  ret = AVERROR(ENOMEM);
1141  goto leave;
1142  }
1143  par->sample_rate = sample_rate;
1144  par->bits_per_coded_sample = bits_per_coded_sample;
1145  flv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
1146  sample_rate = par->sample_rate;
1148  }
1149  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1150  int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
1151  if (ret < 0)
1152  return ret;
1153  size -= ret;
1154  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1156  }
1157 
1158  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1161  int type = avio_r8(s->pb);
1162  size--;
1163 
1164  if (size < 0) {
1165  ret = AVERROR_INVALIDDATA;
1166  goto leave;
1167  }
1168 
1170  // sign extension
1171  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1172  pts = dts + cts;
1173  if (cts < 0) { // dts might be wrong
1174  if (!flv->wrong_dts)
1176  "Negative cts, previous timestamps might be wrong.\n");
1177  flv->wrong_dts = 1;
1178  } else if (FFABS(dts - pts) > 1000*60*15) {
1180  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1181  dts = pts = AV_NOPTS_VALUE;
1182  }
1183  }
1184  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1185  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1186  AVDictionaryEntry *t;
1187 
1188  if (st->codecpar->extradata) {
1189  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1190  return ret;
1191  ret = FFERROR_REDO;
1192  goto leave;
1193  }
1194  if ((ret = flv_get_extradata(s, st, size)) < 0)
1195  return ret;
1196 
1197  /* Workaround for buggy Omnia A/XE encoder */
1198  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1199  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1200  st->codecpar->extradata_size = 2;
1201 
1202  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && 0) {
1203  MPEG4AudioConfig cfg;
1204 
1206  st->codecpar->extradata_size * 8, 1) >= 0) {
1207  st->codecpar->channels = cfg.channels;
1208  st->codecpar->channel_layout = 0;
1209  if (cfg.ext_sample_rate)
1211  else
1212  st->codecpar->sample_rate = cfg.sample_rate;
1213  av_log(s, AV_LOG_TRACE, "mp4a config channels %d sample rate %d\n",
1214  st->codecpar->channels, st->codecpar->sample_rate);
1215  }
1216  }
1217 
1218  ret = FFERROR_REDO;
1219  goto leave;
1220  }
1221  }
1222 
1223  /* skip empty data packets */
1224  if (!size) {
1225  ret = FFERROR_REDO;
1226  goto leave;
1227  }
1228 
1229  ret = av_get_packet(s->pb, pkt, size);
1230  if (ret < 0)
1231  return ret;
1232  pkt->dts = dts;
1233  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1234  pkt->stream_index = st->index;
1235  pkt->pos = pos;
1236  if (flv->new_extradata[stream_type]) {
1238  flv->new_extradata_size[stream_type]);
1239  if (side) {
1240  memcpy(side, flv->new_extradata[stream_type],
1241  flv->new_extradata_size[stream_type]);
1242  av_freep(&flv->new_extradata[stream_type]);
1243  flv->new_extradata_size[stream_type] = 0;
1244  }
1245  }
1246  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1247  (sample_rate != flv->last_sample_rate ||
1248  channels != flv->last_channels)) {
1250  flv->last_channels = channels;
1251  ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1252  }
1253 
1254  if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1255  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1256  stream_type == FLV_STREAM_TYPE_DATA)
1257  pkt->flags |= AV_PKT_FLAG_KEY;
1258 
1259 leave:
1260  last = avio_rb32(s->pb);
1261  if (!flv->trust_datasize) {
1262  if (last != orig_size + 11 && last != orig_size + 10 &&
1263  !avio_feof(s->pb) &&
1264  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1265  !flv->broken_sizes) {
1266  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1267  avio_seek(s->pb, pos + 1, SEEK_SET);
1268  ret = resync(s);
1269  av_packet_unref(pkt);
1270  if (ret >= 0) {
1271  goto retry;
1272  }
1273  }
1274  }
1275  return ret;
1276 }
1277 
1278 static int flv_read_seek(AVFormatContext *s, int stream_index,
1279  int64_t ts, int flags)
1280 {
1281  FLVContext *flv = s->priv_data;
1282  flv->validate_count = 0;
1283  return avio_seek_time(s->pb, stream_index, ts, flags);
1284 }
1285 
1286 #define OFFSET(x) offsetof(FLVContext, x)
1287 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1288 static const AVOption options[] = {
1289  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1290  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1291  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1292  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1293  { NULL }
1294 };
1295 
1296 static const AVClass flv_class = {
1297  .class_name = "flvdec",
1298  .item_name = av_default_item_name,
1299  .option = options,
1300  .version = LIBAVUTIL_VERSION_INT,
1301 };
1302 
1304  .name = "flv",
1305  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1306  .priv_data_size = sizeof(FLVContext),
1307  .read_probe = flv_probe,
1312  .extensions = "flv",
1313  .priv_class = &flv_class,
1314 };
1315 
1316 static const AVClass live_flv_class = {
1317  .class_name = "live_flvdec",
1318  .item_name = av_default_item_name,
1319  .option = options,
1320  .version = LIBAVUTIL_VERSION_INT,
1321 };
1322 
1324  .name = "live_flv",
1325  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1326  .priv_data_size = sizeof(FLVContext),
1332  .extensions = "flv",
1333  .priv_class = &live_flv_class,
1335 };
int missing_streams
Definition: flvdec.c:73
#define RESYNC_BUFFER_SIZE
Definition: flvdec.c:42
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:801
#define TYPE_ONCAPTIONINFO
Definition: flvdec.c:648
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
AVOption.
Definition: opt.h:246
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:284
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2038
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static const int32_t max_pos[4]
Size of the MP-MLQ fixed excitation codebooks.
Definition: g723_1.h:725
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static void clear_index_entries(AVFormatContext *s, int64_t pos)
Definition: flvdec.c:782
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1464
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4881
int64_t pos
Definition: avformat.h:803
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
#define TYPE_ONCAPTION
Definition: flvdec.c:647
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3899
#define KEYFRAMES_TIMESTAMP_TAG
Definition: flv.h:50
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1445
static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecParameters *apar, int flv_codecid)
Definition: flvdec.c:216
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1103
static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, int64_t dts, int64_t next)
Definition: flvdec.c:839
int searched_for_end
Definition: flvdec.c:60
int trust_datasize
trust data size of FLVTag
Definition: flvdec.c:47
enum AVMediaType codec_type
Definition: rtp.c:37
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1666
Definition: flv.h:74
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
const char * key
int version
Definition: avisynth_c.h:766
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
discard all
Definition: avcodec.h:802
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvdec.c:936
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:786
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
#define OFFSET(x)
Definition: flvdec.c:1286
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1278
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3891
int64_t * keyframe_times
Definition: flvdec.c:71
Format I/O context.
Definition: avformat.h:1351
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1484
Public dictionary API.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define TYPE_ONTEXTDATA
Definition: flvdec.c:646
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
int validate_next
Definition: flvdec.c:58
#define VD
Definition: flvdec.c:1287
int width
Video only.
Definition: avcodec.h:3965
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
AVOptions.
#define FLV_AUDIO_CODECID_MASK
Definition: flv.h:42
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
Definition: utils.c:1991
int64_t pos
Definition: flvdec.c:56
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
int wrong_dts
wrong dts due to negative cts
Definition: flvdec.c:49
enum AVStreamParseType need_parsing
Definition: avformat.h:1092
static const AVOption options[]
Definition: flvdec.c:1288
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4454
#define FFERROR_REDO
Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data)...
Definition: internal.h:660
#define FLV_VIDEO_CODECID_MASK
Definition: flv.h:44
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:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
#define VALIDATE_INDEX_TS_THRESH
Definition: flvdec.c:40
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
static void finish(void)
Definition: movenc.c:345
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define FLV_AUDIO_SAMPLERATE_OFFSET
Definition: flv.h:33
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
AMFDataType
Definition: flv.h:122
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:922
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int trust_metadata
configure streams according onMetaData
Definition: flvdec.c:46
int validate_count
Definition: flvdec.c:59
#define FLV_AUDIO_SAMPLERATE_MASK
Definition: flv.h:41
enum AVCodecID video_codec_id
Forced video codec_id.
Definition: avformat.h:1537
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4001
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:648
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3928
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1476
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
Definition: flvdec.c:373
#define AVINDEX_KEYFRAME
Definition: avformat.h:810
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
static void add_keyframes_index(AVFormatContext *s)
Definition: flvdec.c:106
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
#define TYPE_UNKNOWN
Definition: flvdec.c:649
static int live_flv_probe(AVProbeData *p)
Definition: flvdec.c:101
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:471
discard all bidirectional frames
Definition: avcodec.h:799
#define AVERROR(e)
Definition: error.h:43
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:743
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int flv_read_header(AVFormatContext *s)
Definition: flvdec.c:709
int64_t video_bit_rate
Definition: flvdec.c:69
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:558
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3895
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
Definition: utils.c:5013
static AVStream * create_stream(AVFormatContext *s, int codec_type)
Definition: flvdec.c:137
GLsizei GLsizei * length
Definition: opengl_enc.c:115
int64_t * keyframe_filepositions
Definition: flvdec.c:72
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:947
void avcodec_parameters_free(AVCodecParameters **par)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
Definition: utils.c:2001
uint8_t * new_extradata[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:50
int broken_sizes
Definition: flvdec.c:64
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
uint8_t resync_buffer[2 *RESYNC_BUFFER_SIZE]
Definition: flvdec.c:62
static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read)
Definition: flvdec.c:301
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1450
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3917
int64_t dts
Definition: flvdec.c:55
Only parse headers, do not repack.
Definition: avformat.h:794
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:639
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:451
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
int last_keyframe_stream_index
Definition: flvdec.c:67
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
audio channel layout utility functions
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:3286
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:794
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int dump_full_metadata
Dump full metadata of the onMetadata.
Definition: flvdec.c:48
#define FFMIN(a, b)
Definition: common.h:96
enum AVCodecID audio_codec_id
Forced audio codec_id.
Definition: avformat.h:1543
struct FLVContext::@247 validate_index[2]
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
int64_t audio_bit_rate
Definition: flvdec.c:70
static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
Definition: flvdec.c:165
int new_extradata_size[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:51
int32_t
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1667
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
static int flv_probe(AVProbeData *p)
Definition: flvdec.c:96
video info/command frame
Definition: flv.h:119
enum AVCodecID codec_id
Definition: vaapi_decode.c:364
static const AVClass flv_class
Definition: flvdec.c:1296
#define KEYFRAMES_TAG
Definition: flv.h:49
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
Stream structure.
Definition: avformat.h:874
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static const AVClass live_flv_class
Definition: flvdec.c:1316
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int sum_flv_tag_size
Definition: flvdec.c:65
static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
Definition: flvdec.c:651
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1166
sample_rate
FLV common header.
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
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_RB24
Definition: bytestream.h:87
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
AVRational framerate
Definition: flvdec.c:74
static int resync(AVFormatContext *s)
Definition: flvdec.c:906
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
static int probe(AVProbeData *p, int live)
Definition: flvdec.c:77
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
disposable inter frame (H.263 only)
Definition: flv.h:117
int last_sample_rate
Definition: flvdec.c:52
int nb_index_entries
Definition: avformat.h:1105
Describe the class of an AVClass context structure.
Definition: log.h:67
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int keyframe_count
Definition: flvdec.c:68
int last_channels
Definition: flvdec.c:53
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:192
static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, int size)
Definition: flvdec.c:766
AVMediaType
Definition: avutil.h:199
#define snprintf
Definition: snprintf.h:34
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
#define FLV_AUDIO_CHANNEL_MASK
Definition: flv.h:39
#define FLV_AUDIO_SAMPLESIZE_MASK
Definition: flv.h:40
#define AMF_END_OF_OBJECT
Definition: flv.h:47
#define KEYFRAMES_BYTEOFFSET_TAG
Definition: flv.h:51
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:596
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1456
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
int sample_rate
Audio only.
Definition: avcodec.h:4009
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
full parsing and repack
Definition: avformat.h:793
Main libavformat public API header.
int
raw UTF-8 text
Definition: avcodec.h:652
#define FLV_VIDEO_FRAMETYPE_MASK
Definition: flv.h:45
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3304
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
Definition: flvdec.c:358
AVInputFormat ff_live_flv_demuxer
Definition: flvdec.c:1323
AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1303
int avpriv_mpeg4audio_get_config(MPEG4AudioConfig *c, const uint8_t *buf, int bit_size, int sync_extension)
Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration. ...
Definition: mpeg4audio.c:155
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:781
static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
Definition: flvdec.c:798
int64_t avio_seek_time(AVIOContext *h, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
Definition: aviobuf.c:1242
FlvTagType
Definition: flv.h:59
#define av_free(p)
char * value
Definition: dict.h:87
int eof_reached
true if eof reached
Definition: avio.h:239
static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth)
Definition: flvdec.c:459
void * priv_data
Format private data.
Definition: avformat.h:1379
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:289
key frame (for AVC, a seekable frame)
Definition: flv.h:115
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3941
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3913
int channels
Audio only.
Definition: avcodec.h:4005
#define av_uninit(x)
Definition: attributes.h:148
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1443
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
Definition: flvdec.c:754
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
FILE * out
Definition: movenc.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
static int array[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:106
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3903
static int64_t fsize(FILE *f)
Definition: audiomatch.c:28
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
int stream_index
Definition: avcodec.h:1446
#define AV_CH_LAYOUT_MONO
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:929
This structure stores compressed data.
Definition: avcodec.h:1421
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1437
static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
Definition: flvdec.c:276
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:125