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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
150  if (codec_type == AVMEDIA_TYPE_AUDIO) {
151  st->codecpar->bit_rate = flv->audio_bit_rate;
153  }
154  if (codec_type == AVMEDIA_TYPE_VIDEO) {
155  st->codecpar->bit_rate = flv->video_bit_rate;
157  st->avg_frame_rate = flv->framerate;
158  }
159 
160 
161  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
164  return st;
165 }
166 
168 {
169  int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
170  int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
171  int codec_id;
172 
173  if (!apar->codec_id && !apar->codec_tag)
174  return 1;
175 
176  if (apar->bits_per_coded_sample != bits_per_coded_sample)
177  return 0;
178 
179  switch (flv_codecid) {
180  // no distinction between S16 and S8 PCM codec flags
181  case FLV_CODECID_PCM:
182  codec_id = bits_per_coded_sample == 8
184 #if HAVE_BIGENDIAN
186 #else
188 #endif
189  return codec_id == apar->codec_id;
190  case FLV_CODECID_PCM_LE:
191  codec_id = bits_per_coded_sample == 8
194  return codec_id == apar->codec_id;
195  case FLV_CODECID_AAC:
196  return apar->codec_id == AV_CODEC_ID_AAC;
197  case FLV_CODECID_ADPCM:
198  return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
199  case FLV_CODECID_SPEEX:
200  return apar->codec_id == AV_CODEC_ID_SPEEX;
201  case FLV_CODECID_MP3:
202  return apar->codec_id == AV_CODEC_ID_MP3;
206  return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
208  return apar->sample_rate == 8000 &&
211  return apar->sample_rate == 8000 &&
213  default:
214  return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
215  }
216 }
217 
219  AVCodecParameters *apar, int flv_codecid)
220 {
221  switch (flv_codecid) {
222  // no distinction between S16 and S8 PCM codec flags
223  case FLV_CODECID_PCM:
224  apar->codec_id = apar->bits_per_coded_sample == 8
226 #if HAVE_BIGENDIAN
228 #else
230 #endif
231  break;
232  case FLV_CODECID_PCM_LE:
233  apar->codec_id = apar->bits_per_coded_sample == 8
236  break;
237  case FLV_CODECID_AAC:
238  apar->codec_id = AV_CODEC_ID_AAC;
239  break;
240  case FLV_CODECID_ADPCM:
242  break;
243  case FLV_CODECID_SPEEX:
244  apar->codec_id = AV_CODEC_ID_SPEEX;
245  apar->sample_rate = 16000;
246  break;
247  case FLV_CODECID_MP3:
248  apar->codec_id = AV_CODEC_ID_MP3;
250  break;
252  // in case metadata does not otherwise declare samplerate
253  apar->sample_rate = 8000;
255  break;
257  apar->sample_rate = 16000;
259  break;
262  break;
264  apar->sample_rate = 8000;
266  break;
268  apar->sample_rate = 8000;
270  break;
271  default:
272  avpriv_request_sample(s, "Audio codec (%x)",
273  flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
274  apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
275  }
276 }
277 
279 {
280  int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
281 
282  if (!vpar->codec_id && !vpar->codec_tag)
283  return 1;
284 
285  switch (flv_codecid) {
286  case FLV_CODECID_H263:
287  return vpar->codec_id == AV_CODEC_ID_FLV1;
288  case FLV_CODECID_SCREEN:
289  return vpar->codec_id == AV_CODEC_ID_FLASHSV;
290  case FLV_CODECID_SCREEN2:
291  return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
292  case FLV_CODECID_VP6:
293  return vpar->codec_id == AV_CODEC_ID_VP6F;
294  case FLV_CODECID_VP6A:
295  return vpar->codec_id == AV_CODEC_ID_VP6A;
296  case FLV_CODECID_H264:
297  return vpar->codec_id == AV_CODEC_ID_H264;
298  default:
299  return vpar->codec_tag == flv_codecid;
300  }
301 }
302 
304  int flv_codecid, int read)
305 {
306  int ret = 0;
307  AVCodecParameters *par = vstream->codecpar;
308  enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
309  switch (flv_codecid) {
310  case FLV_CODECID_H263:
311  par->codec_id = AV_CODEC_ID_FLV1;
312  break;
314  par->codec_id = AV_CODEC_ID_H263;
315  break; // Really mean it this time
316  case FLV_CODECID_SCREEN:
318  break;
319  case FLV_CODECID_SCREEN2:
321  break;
322  case FLV_CODECID_VP6:
323  par->codec_id = AV_CODEC_ID_VP6F;
324  case FLV_CODECID_VP6A:
325  if (flv_codecid == FLV_CODECID_VP6A)
326  par->codec_id = AV_CODEC_ID_VP6A;
327  if (read) {
328  if (par->extradata_size != 1) {
329  ff_alloc_extradata(par, 1);
330  }
331  if (par->extradata)
332  par->extradata[0] = avio_r8(s->pb);
333  else
334  avio_skip(s->pb, 1);
335  }
336  ret = 1; // 1 byte body size adjustment for flv_read_packet()
337  break;
338  case FLV_CODECID_H264:
339  par->codec_id = AV_CODEC_ID_H264;
341  ret = 3; // not 4, reading packet type will consume one byte
342  break;
343  case FLV_CODECID_MPEG4:
345  ret = 3;
346  break;
347  default:
348  avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
349  par->codec_tag = flv_codecid;
350  }
351 
352  if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
353  avpriv_request_sample(s, "Changing the codec id midstream");
354  return AVERROR_PATCHWELCOME;
355  }
356 
357  return ret;
358 }
359 
360 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
361 {
362  int length = avio_rb16(ioc);
363  if (length >= buffsize) {
364  avio_skip(ioc, length);
365  return -1;
366  }
367 
368  avio_read(ioc, buffer, length);
369 
370  buffer[length] = '\0';
371 
372  return length;
373 }
374 
376 {
377  FLVContext *flv = s->priv_data;
378  unsigned int timeslen = 0, fileposlen = 0, i;
379  char str_val[256];
380  int64_t *times = NULL;
381  int64_t *filepositions = NULL;
382  int ret = AVERROR(ENOSYS);
383  int64_t initial_pos = avio_tell(ioc);
384 
385  if (flv->keyframe_count > 0) {
386  av_log(s, AV_LOG_DEBUG, "keyframes have been paresed\n");
387  return 0;
388  }
389  av_assert0(!flv->keyframe_times);
391 
392  if (s->flags & AVFMT_FLAG_IGNIDX)
393  return 0;
394 
395  while (avio_tell(ioc) < max_pos - 2 &&
396  amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
397  int64_t **current_array;
398  unsigned int arraylen;
399 
400  // Expect array object in context
401  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
402  break;
403 
404  arraylen = avio_rb32(ioc);
405  if (arraylen>>28)
406  break;
407 
408  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
409  current_array = &times;
410  timeslen = arraylen;
411  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
412  !filepositions) {
413  current_array = &filepositions;
414  fileposlen = arraylen;
415  } else
416  // unexpected metatag inside keyframes, will not use such
417  // metadata for indexing
418  break;
419 
420  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
421  ret = AVERROR(ENOMEM);
422  goto finish;
423  }
424 
425  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
426  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
427  goto invalid;
428  current_array[0][i] = av_int2double(avio_rb64(ioc));
429  }
430  if (times && filepositions) {
431  // All done, exiting at a position allowing amf_parse_object
432  // to finish parsing the object
433  ret = 0;
434  break;
435  }
436  }
437 
438  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
439  for (i = 0; i < FFMIN(2,fileposlen); i++) {
440  flv->validate_index[i].pos = filepositions[i];
441  flv->validate_index[i].dts = times[i] * 1000;
442  flv->validate_count = i + 1;
443  }
444  flv->keyframe_times = times;
445  flv->keyframe_filepositions = filepositions;
446  flv->keyframe_count = timeslen;
447  times = NULL;
448  filepositions = NULL;
449  } else {
450 invalid:
451  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
452  }
453 
454 finish:
455  av_freep(&times);
456  av_freep(&filepositions);
457  avio_seek(ioc, initial_pos, SEEK_SET);
458  return ret;
459 }
460 
462  AVStream *vstream, const char *key,
463  int64_t max_pos, int depth)
464 {
465  AVCodecParameters *apar, *vpar;
466  FLVContext *flv = s->priv_data;
467  AVIOContext *ioc;
468  AMFDataType amf_type;
469  char str_val[1024];
470  double num_val;
471 
472  num_val = 0;
473  ioc = s->pb;
474  amf_type = avio_r8(ioc);
475 
476  switch (amf_type) {
478  num_val = av_int2double(avio_rb64(ioc));
479  break;
480  case AMF_DATA_TYPE_BOOL:
481  num_val = avio_r8(ioc);
482  break;
484  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
485  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
486  return -1;
487  }
488  break;
490  if (key &&
491  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
492  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
493  if (parse_keyframes_index(s, ioc,
494  max_pos) < 0)
495  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
496  else
498  while (avio_tell(ioc) < max_pos - 2 &&
499  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
500  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
501  depth + 1) < 0)
502  return -1; // if we couldn't skip, bomb out.
503  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
504  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
505  return -1;
506  }
507  break;
508  case AMF_DATA_TYPE_NULL:
511  break; // these take up no additional space
513  {
514  unsigned v;
515  avio_skip(ioc, 4); // skip 32-bit max array index
516  while (avio_tell(ioc) < max_pos - 2 &&
517  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
518  // this is the only case in which we would want a nested
519  // parse to not skip over the object
520  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
521  depth + 1) < 0)
522  return -1;
523  v = avio_r8(ioc);
524  if (v != AMF_END_OF_OBJECT) {
525  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
526  return -1;
527  }
528  break;
529  }
530  case AMF_DATA_TYPE_ARRAY:
531  {
532  unsigned int arraylen, i;
533 
534  arraylen = avio_rb32(ioc);
535  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
536  if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
537  depth + 1) < 0)
538  return -1; // if we couldn't skip, bomb out.
539  }
540  break;
541  case AMF_DATA_TYPE_DATE:
542  avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16)
543  break;
544  default: // unsupported type, we couldn't skip
545  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
546  return -1;
547  }
548 
549  if (key) {
550  apar = astream ? astream->codecpar : NULL;
551  vpar = vstream ? vstream->codecpar : NULL;
552 
553  // stream info doesn't live any deeper than the first object
554  if (depth == 1) {
555  if (amf_type == AMF_DATA_TYPE_NUMBER ||
556  amf_type == AMF_DATA_TYPE_BOOL) {
557  if (!strcmp(key, "duration"))
558  s->duration = num_val * AV_TIME_BASE;
559  else if (!strcmp(key, "videodatarate") &&
560  0 <= (int)(num_val * 1024.0))
561  flv->video_bit_rate = num_val * 1024.0;
562  else if (!strcmp(key, "audiodatarate") &&
563  0 <= (int)(num_val * 1024.0))
564  flv->audio_bit_rate = num_val * 1024.0;
565  else if (!strcmp(key, "datastream")) {
567  if (!st)
568  return AVERROR(ENOMEM);
570  } else if (!strcmp(key, "framerate")) {
571  flv->framerate = av_d2q(num_val, 1000);
572  if (vstream)
573  vstream->avg_frame_rate = flv->framerate;
574  } else if (flv->trust_metadata) {
575  if (!strcmp(key, "videocodecid") && vpar) {
576  int ret = flv_set_video_codec(s, vstream, num_val, 0);
577  if (ret < 0)
578  return ret;
579  } else if (!strcmp(key, "audiocodecid") && apar) {
580  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
581  flv_set_audio_codec(s, astream, apar, id);
582  } else if (!strcmp(key, "audiosamplerate") && apar) {
583  apar->sample_rate = num_val;
584  } else if (!strcmp(key, "audiosamplesize") && apar) {
585  apar->bits_per_coded_sample = num_val;
586  } else if (!strcmp(key, "stereo") && apar) {
587  apar->channels = num_val + 1;
588  apar->channel_layout = apar->channels == 2 ?
591  } else if (!strcmp(key, "width") && vpar) {
592  vpar->width = num_val;
593  } else if (!strcmp(key, "height") && vpar) {
594  vpar->height = num_val;
595  }
596  }
597  }
598  if (amf_type == AMF_DATA_TYPE_STRING) {
599  if (!strcmp(key, "encoder")) {
600  int version = -1;
601  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
602  if (version > 0 && version <= 655)
603  flv->broken_sizes = 1;
604  }
605  } else if (!strcmp(key, "metadatacreator")) {
606  if ( !strcmp (str_val, "MEGA")
607  || !strncmp(str_val, "FlixEngine", 10))
608  flv->broken_sizes = 1;
609  }
610  }
611  }
612 
613  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
614  ((!apar && !strcmp(key, "audiocodecid")) ||
615  (!vpar && !strcmp(key, "videocodecid"))))
616  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
617 
618  if ((!strcmp(key, "duration") ||
619  !strcmp(key, "filesize") ||
620  !strcmp(key, "width") ||
621  !strcmp(key, "height") ||
622  !strcmp(key, "videodatarate") ||
623  !strcmp(key, "framerate") ||
624  !strcmp(key, "videocodecid") ||
625  !strcmp(key, "audiodatarate") ||
626  !strcmp(key, "audiosamplerate") ||
627  !strcmp(key, "audiosamplesize") ||
628  !strcmp(key, "stereo") ||
629  !strcmp(key, "audiocodecid") ||
630  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
631  return 0;
632 
634  if (amf_type == AMF_DATA_TYPE_BOOL) {
635  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
636  sizeof(str_val));
637  av_dict_set(&s->metadata, key, str_val, 0);
638  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
639  snprintf(str_val, sizeof(str_val), "%.f", num_val);
640  av_dict_set(&s->metadata, key, str_val, 0);
641  } else if (amf_type == AMF_DATA_TYPE_STRING)
642  av_dict_set(&s->metadata, key, str_val, 0);
643  }
644 
645  return 0;
646 }
647 
648 #define TYPE_ONTEXTDATA 1
649 #define TYPE_ONCAPTION 2
650 #define TYPE_ONCAPTIONINFO 3
651 #define TYPE_UNKNOWN 9
652 
653 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
654 {
655  FLVContext *flv = s->priv_data;
657  AVStream *stream, *astream, *vstream;
658  AVStream av_unused *dstream;
659  AVIOContext *ioc;
660  int i;
661  char buffer[32];
662 
663  astream = NULL;
664  vstream = NULL;
665  dstream = NULL;
666  ioc = s->pb;
667 
668  // first object needs to be "onMetaData" string
669  type = avio_r8(ioc);
670  if (type != AMF_DATA_TYPE_STRING ||
671  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
672  return TYPE_UNKNOWN;
673 
674  if (!strcmp(buffer, "onTextData"))
675  return TYPE_ONTEXTDATA;
676 
677  if (!strcmp(buffer, "onCaption"))
678  return TYPE_ONCAPTION;
679 
680  if (!strcmp(buffer, "onCaptionInfo"))
681  return TYPE_ONCAPTIONINFO;
682 
683  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
684  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
685  return TYPE_UNKNOWN;
686  }
687 
688  // find the streams now so that amf_parse_object doesn't need to do
689  // the lookup every time it is called.
690  for (i = 0; i < s->nb_streams; i++) {
691  stream = s->streams[i];
692  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
693  vstream = stream;
695  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
696  astream = stream;
697  if (flv->last_keyframe_stream_index == -1)
699  }
700  else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
701  dstream = stream;
702  }
703 
704  // parse the second object (we want a mixed array)
705  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
706  return -1;
707 
708  return 0;
709 }
710 
712 {
713  int flags;
714  FLVContext *flv = s->priv_data;
715  int offset;
716  int pre_tag_size = 0;
717 
718  avio_skip(s->pb, 4);
719  flags = avio_r8(s->pb);
720 
722 
724 
725  offset = avio_rb32(s->pb);
726  avio_seek(s->pb, offset, SEEK_SET);
727 
728  /* Annex E. The FLV File Format
729  * E.3 TheFLVFileBody
730  * Field Type Comment
731  * PreviousTagSize0 UI32 Always 0
732  * */
733  pre_tag_size = avio_rb32(s->pb);
734  if (pre_tag_size) {
735  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
736  }
737 
738  s->start_time = 0;
739  flv->sum_flv_tag_size = 0;
740  flv->last_keyframe_stream_index = -1;
741 
742  return 0;
743 }
744 
746 {
747  int i;
748  FLVContext *flv = s->priv_data;
749  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
750  av_freep(&flv->new_extradata[i]);
751  av_freep(&flv->keyframe_times);
753  return 0;
754 }
755 
757 {
758  if (!size)
759  return 0;
760 
761  av_freep(&st->codecpar->extradata);
762  if (ff_get_extradata(s, st->codecpar, s->pb, size) < 0)
763  return AVERROR(ENOMEM);
764  st->internal->need_context_update = 1;
765  return 0;
766 }
767 
768 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
769  int size)
770 {
771  if (!size)
772  return 0;
773 
774  av_free(flv->new_extradata[stream]);
775  flv->new_extradata[stream] = av_mallocz(size +
777  if (!flv->new_extradata[stream])
778  return AVERROR(ENOMEM);
779  flv->new_extradata_size[stream] = size;
780  avio_read(pb, flv->new_extradata[stream], size);
781  return 0;
782 }
783 
784 static void clear_index_entries(AVFormatContext *s, int64_t pos)
785 {
786  int i, j, out;
788  "Found invalid index entries, clearing the index.\n");
789  for (i = 0; i < s->nb_streams; i++) {
790  AVStream *st = s->streams[i];
791  /* Remove all index entries that point to >= pos */
792  out = 0;
793  for (j = 0; j < st->nb_index_entries; j++)
794  if (st->index_entries[j].pos < pos)
795  st->index_entries[out++] = st->index_entries[j];
796  st->nb_index_entries = out;
797  }
798 }
799 
801 {
802  int nb = -1, ret, parse_name = 1;
803 
804  switch (type) {
806  avio_skip(pb, 8);
807  break;
808  case AMF_DATA_TYPE_BOOL:
809  avio_skip(pb, 1);
810  break;
812  avio_skip(pb, avio_rb16(pb));
813  break;
814  case AMF_DATA_TYPE_ARRAY:
815  parse_name = 0;
817  nb = avio_rb32(pb);
819  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
820  if (parse_name) {
821  int size = avio_rb16(pb);
822  if (!size) {
823  avio_skip(pb, 1);
824  break;
825  }
826  avio_skip(pb, size);
827  }
828  if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
829  return ret;
830  }
831  break;
832  case AMF_DATA_TYPE_NULL:
834  break;
835  default:
836  return AVERROR_INVALIDDATA;
837  }
838  return 0;
839 }
840 
842  int64_t dts, int64_t next)
843 {
844  AVIOContext *pb = s->pb;
845  AVStream *st = NULL;
846  char buf[20];
847  int ret = AVERROR_INVALIDDATA;
848  int i, length = -1;
849  int array = 0;
850 
851  switch (avio_r8(pb)) {
852  case AMF_DATA_TYPE_ARRAY:
853  array = 1;
855  avio_seek(pb, 4, SEEK_CUR);
857  break;
858  default:
859  goto skip;
860  }
861 
862  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
863  AMFDataType type = avio_r8(pb);
864  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
865  length = avio_rb16(pb);
866  ret = av_get_packet(pb, pkt, length);
867  if (ret < 0)
868  goto skip;
869  else
870  break;
871  } else {
872  if ((ret = amf_skip_tag(pb, type)) < 0)
873  goto skip;
874  }
875  }
876 
877  if (length < 0) {
878  ret = AVERROR_INVALIDDATA;
879  goto skip;
880  }
881 
882  for (i = 0; i < s->nb_streams; i++) {
883  st = s->streams[i];
885  break;
886  }
887 
888  if (i == s->nb_streams) {
890  if (!st)
891  return AVERROR(ENOMEM);
893  }
894 
895  pkt->dts = dts;
896  pkt->pts = dts;
897  pkt->size = ret;
898 
899  pkt->stream_index = st->index;
900  pkt->flags |= AV_PKT_FLAG_KEY;
901 
902 skip:
903  avio_seek(s->pb, next + 4, SEEK_SET);
904 
905  return ret;
906 }
907 
909 {
910  FLVContext *flv = s->priv_data;
911  int64_t i;
912  int64_t pos = avio_tell(s->pb);
913 
914  for (i=0; !avio_feof(s->pb); i++) {
915  int j = i & (RESYNC_BUFFER_SIZE-1);
916  int j1 = j + RESYNC_BUFFER_SIZE;
917  flv->resync_buffer[j ] =
918  flv->resync_buffer[j1] = avio_r8(s->pb);
919 
920  if (i > 22) {
921  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
922  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
923  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
924  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
925  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
926  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
927  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
928  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
929  return 1;
930  }
931  }
932  }
933  }
934  }
935  return AVERROR_EOF;
936 }
937 
939 {
940  FLVContext *flv = s->priv_data;
941  int ret, i, size, flags;
942  enum FlvTagType type;
943  int stream_type=-1;
944  int64_t next, pos, meta_pos;
945  int64_t dts, pts = AV_NOPTS_VALUE;
946  int av_uninit(channels);
947  int av_uninit(sample_rate);
948  AVStream *st = NULL;
949  int last = -1;
950  int orig_size;
951 
952 retry:
953  /* pkt size is repeated at end. skip it */
954  pos = avio_tell(s->pb);
955  type = (avio_r8(s->pb) & 0x1F);
956  orig_size =
957  size = avio_rb24(s->pb);
958  flv->sum_flv_tag_size += size + 11;
959  dts = avio_rb24(s->pb);
960  dts |= (unsigned)avio_r8(s->pb) << 24;
961  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));
962  if (avio_feof(s->pb))
963  return AVERROR_EOF;
964  avio_skip(s->pb, 3); /* stream id, always 0 */
965  flags = 0;
966 
967  if (flv->validate_next < flv->validate_count) {
968  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
969  if (pos == validate_pos) {
970  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
972  flv->validate_next++;
973  } else {
974  clear_index_entries(s, validate_pos);
975  flv->validate_count = 0;
976  }
977  } else if (pos > validate_pos) {
978  clear_index_entries(s, validate_pos);
979  flv->validate_count = 0;
980  }
981  }
982 
983  if (size == 0) {
984  ret = FFERROR_REDO;
985  goto leave;
986  }
987 
988  next = size + avio_tell(s->pb);
989 
990  if (type == FLV_TAG_TYPE_AUDIO) {
991  stream_type = FLV_STREAM_TYPE_AUDIO;
992  flags = avio_r8(s->pb);
993  size--;
994  } else if (type == FLV_TAG_TYPE_VIDEO) {
995  stream_type = FLV_STREAM_TYPE_VIDEO;
996  flags = avio_r8(s->pb);
997  size--;
999  goto skip;
1000  } else if (type == FLV_TAG_TYPE_META) {
1001  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1002  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1003  int type;
1004  meta_pos = avio_tell(s->pb);
1005  type = flv_read_metabody(s, next);
1006  if (type == 0 && dts == 0 || type < 0) {
1007  if (type < 0 && flv->validate_count &&
1008  flv->validate_index[0].pos > next &&
1009  flv->validate_index[0].pos - 4 < next
1010  ) {
1011  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1012  next = flv->validate_index[0].pos - 4;
1013  }
1014  goto skip;
1015  } else if (type == TYPE_ONTEXTDATA) {
1016  avpriv_request_sample(s, "OnTextData packet");
1017  return flv_data_packet(s, pkt, dts, next);
1018  } else if (type == TYPE_ONCAPTION) {
1019  return flv_data_packet(s, pkt, dts, next);
1020  } else if (type == TYPE_UNKNOWN) {
1021  stream_type = FLV_STREAM_TYPE_DATA;
1022  }
1023  avio_seek(s->pb, meta_pos, SEEK_SET);
1024  }
1025  } else {
1026  av_log(s, AV_LOG_DEBUG,
1027  "Skipping flv packet: type %d, size %d, flags %d.\n",
1028  type, size, flags);
1029 skip:
1030  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1031  // This can happen if flv_read_metabody above read past
1032  // next, on a non-seekable input, and the preceding data has
1033  // been flushed out from the IO buffer.
1034  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1035  return AVERROR_INVALIDDATA;
1036  }
1037  ret = FFERROR_REDO;
1038  goto leave;
1039  }
1040 
1041  /* skip empty data packets */
1042  if (!size) {
1043  ret = FFERROR_REDO;
1044  goto leave;
1045  }
1046 
1047  /* now find stream */
1048  for (i = 0; i < s->nb_streams; i++) {
1049  st = s->streams[i];
1050  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1051  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1052  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1053  break;
1054  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1055  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1056  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1057  break;
1058  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1060  break;
1061  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1063  break;
1064  }
1065  }
1066  if (i == s->nb_streams) {
1068  st = create_stream(s, stream_types[stream_type]);
1069  if (!st)
1070  return AVERROR(ENOMEM);
1071 
1072  }
1073  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1074 
1075  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1076  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
1077  stream_type == FLV_STREAM_TYPE_AUDIO))
1078  av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
1079 
1080  if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
1081  ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
1082  || st->discard >= AVDISCARD_ALL
1083  ) {
1084  avio_seek(s->pb, next, SEEK_SET);
1085  ret = FFERROR_REDO;
1086  goto leave;
1087  }
1088 
1089  // if not streamed and no duration from metadata then seek to end to find
1090  // the duration from the timestamps
1091  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1092  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1093  !flv->searched_for_end) {
1094  int size;
1095  const int64_t pos = avio_tell(s->pb);
1096  // Read the last 4 bytes of the file, this should be the size of the
1097  // previous FLV tag. Use the timestamp of its payload as duration.
1098  int64_t fsize = avio_size(s->pb);
1099 retry_duration:
1100  avio_seek(s->pb, fsize - 4, SEEK_SET);
1101  size = avio_rb32(s->pb);
1102  if (size > 0 && size < fsize) {
1103  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1104  // but skip the byte indicating the type.
1105  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1106  if (size == avio_rb24(s->pb) + 11) {
1107  uint32_t ts = avio_rb24(s->pb);
1108  ts |= avio_r8(s->pb) << 24;
1109  if (ts)
1110  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1111  else if (fsize >= 8 && fsize - 8 >= size) {
1112  fsize -= size+4;
1113  goto retry_duration;
1114  }
1115  }
1116  }
1117 
1118  avio_seek(s->pb, pos, SEEK_SET);
1119  flv->searched_for_end = 1;
1120  }
1121 
1122  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1123  int bits_per_coded_sample;
1124  channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
1125  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1127  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1128  if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1130  st->codecpar->channels = channels;
1131  st->codecpar->channel_layout = channels == 1
1135  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1136  }
1137  if (!st->codecpar->codec_id) {
1138  flv_set_audio_codec(s, st, st->codecpar,
1139  flags & FLV_AUDIO_CODECID_MASK);
1140  flv->last_sample_rate =
1142  flv->last_channels =
1143  channels = st->codecpar->channels;
1144  } else {
1146  if (!par) {
1147  ret = AVERROR(ENOMEM);
1148  goto leave;
1149  }
1150  par->sample_rate = sample_rate;
1151  par->bits_per_coded_sample = bits_per_coded_sample;
1152  flv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
1153  sample_rate = par->sample_rate;
1155  }
1156  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1157  int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
1158  if (ret < 0)
1159  return ret;
1160  size -= ret;
1161  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1163  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1164  st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1165  }
1166 
1167  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1170  int type = avio_r8(s->pb);
1171  size--;
1172 
1173  if (size < 0) {
1174  ret = AVERROR_INVALIDDATA;
1175  goto leave;
1176  }
1177 
1179  // sign extension
1180  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1181  pts = dts + cts;
1182  if (cts < 0) { // dts might be wrong
1183  if (!flv->wrong_dts)
1185  "Negative cts, previous timestamps might be wrong.\n");
1186  flv->wrong_dts = 1;
1187  } else if (FFABS(dts - pts) > 1000*60*15) {
1189  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1190  dts = pts = AV_NOPTS_VALUE;
1191  }
1192  }
1193  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1194  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1195  AVDictionaryEntry *t;
1196 
1197  if (st->codecpar->extradata) {
1198  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1199  return ret;
1200  ret = FFERROR_REDO;
1201  goto leave;
1202  }
1203  if ((ret = flv_get_extradata(s, st, size)) < 0)
1204  return ret;
1205 
1206  /* Workaround for buggy Omnia A/XE encoder */
1207  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1208  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1209  st->codecpar->extradata_size = 2;
1210 
1211  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && 0) {
1212  MPEG4AudioConfig cfg;
1213 
1215  st->codecpar->extradata_size * 8, 1) >= 0) {
1216  st->codecpar->channels = cfg.channels;
1217  st->codecpar->channel_layout = 0;
1218  if (cfg.ext_sample_rate)
1220  else
1221  st->codecpar->sample_rate = cfg.sample_rate;
1222  av_log(s, AV_LOG_TRACE, "mp4a config channels %d sample rate %d\n",
1223  st->codecpar->channels, st->codecpar->sample_rate);
1224  }
1225  }
1226 
1227  ret = FFERROR_REDO;
1228  goto leave;
1229  }
1230  }
1231 
1232  /* skip empty data packets */
1233  if (!size) {
1234  ret = FFERROR_REDO;
1235  goto leave;
1236  }
1237 
1238  ret = av_get_packet(s->pb, pkt, size);
1239  if (ret < 0)
1240  return ret;
1241  pkt->dts = dts;
1242  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1243  pkt->stream_index = st->index;
1244  pkt->pos = pos;
1245  if (flv->new_extradata[stream_type]) {
1247  flv->new_extradata_size[stream_type]);
1248  if (side) {
1249  memcpy(side, flv->new_extradata[stream_type],
1250  flv->new_extradata_size[stream_type]);
1251  av_freep(&flv->new_extradata[stream_type]);
1252  flv->new_extradata_size[stream_type] = 0;
1253  }
1254  }
1255  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1256  (sample_rate != flv->last_sample_rate ||
1257  channels != flv->last_channels)) {
1259  flv->last_channels = channels;
1260  ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1261  }
1262 
1263  if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1264  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1265  stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1266  stream_type == FLV_STREAM_TYPE_DATA)
1267  pkt->flags |= AV_PKT_FLAG_KEY;
1268 
1269 leave:
1270  last = avio_rb32(s->pb);
1271  if (!flv->trust_datasize) {
1272  if (last != orig_size + 11 && last != orig_size + 10 &&
1273  !avio_feof(s->pb) &&
1274  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1275  !flv->broken_sizes) {
1276  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1277  avio_seek(s->pb, pos + 1, SEEK_SET);
1278  ret = resync(s);
1279  av_packet_unref(pkt);
1280  if (ret >= 0) {
1281  goto retry;
1282  }
1283  }
1284  }
1285  return ret;
1286 }
1287 
1288 static int flv_read_seek(AVFormatContext *s, int stream_index,
1289  int64_t ts, int flags)
1290 {
1291  FLVContext *flv = s->priv_data;
1292  flv->validate_count = 0;
1293  return avio_seek_time(s->pb, stream_index, ts, flags);
1294 }
1295 
1296 #define OFFSET(x) offsetof(FLVContext, x)
1297 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1298 static const AVOption options[] = {
1299  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1300  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1301  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1302  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1303  { NULL }
1304 };
1305 
1306 static const AVClass flv_class = {
1307  .class_name = "flvdec",
1308  .item_name = av_default_item_name,
1309  .option = options,
1310  .version = LIBAVUTIL_VERSION_INT,
1311 };
1312 
1314  .name = "flv",
1315  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1316  .priv_data_size = sizeof(FLVContext),
1317  .read_probe = flv_probe,
1322  .extensions = "flv",
1323  .priv_class = &flv_class,
1324 };
1325 
1326 static const AVClass live_flv_class = {
1327  .class_name = "live_flvdec",
1328  .item_name = av_default_item_name,
1329  .option = options,
1330  .version = LIBAVUTIL_VERSION_INT,
1331 };
1332 
1334  .name = "live_flv",
1335  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1336  .priv_data_size = sizeof(FLVContext),
1342  .extensions = "flv",
1343  .priv_class = &live_flv_class,
1345 };
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:804
#define TYPE_ONCAPTIONINFO
Definition: flvdec.c:650
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:2039
Definition: flv.h:75
#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:728
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static void clear_index_entries(AVFormatContext *s, int64_t pos)
Definition: flvdec.c:784
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1486
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:4882
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:649
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3931
#define KEYFRAMES_TIMESTAMP_TAG
Definition: flv.h:50
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1467
static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecParameters *apar, int flv_codecid)
Definition: flvdec.c:218
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:841
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
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:805
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvdec.c:938
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:1296
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1288
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3923
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:648
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:1297
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: avcodec.h:3997
#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:1994
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:1298
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4455
#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
disposable inter frame (H.263 only)
Definition: flv.h:118
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:123
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:4033
#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:3960
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1498
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
Definition: flvdec.c:375
#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:651
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:802
#define AVERROR(e)
Definition: error.h:43
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:745
#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:711
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:560
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3927
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:5014
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:2004
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:303
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1472
video info/command frame
Definition: flv.h:120
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3949
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:3287
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
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:167
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
enum AVCodecID codec_id
Definition: vaapi_decode.c:364
static const AVClass flv_class
Definition: flvdec.c:1306
struct FLVContext::@249 validate_index[2]
#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:1326
#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:653
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1188
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:908
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
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:768
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:606
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:4041
#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:655
#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:3305
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
Definition: flvdec.c:360
AVInputFormat ff_live_flv_demuxer
Definition: flvdec.c:1333
AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1313
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:784
static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
Definition: flvdec.c:800
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 was unable to read due to error or eof
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:461
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
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3973
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3945
int channels
Audio only.
Definition: avcodec.h:4037
#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:1465
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
Definition: flvdec.c:756
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
key frame (for AVC, a seekable frame)
Definition: flv.h:116
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)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3935
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:1468
#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:1443
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1459
static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
Definition: flvdec.c:278
#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