FFmpeg
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/avassert.h"
28 #include "libavutil/avstring.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/intreadwrite.h"
35 #include "libavutil/mathematics.h"
36 #include "avformat.h"
37 #include "demux.h"
38 #include "internal.h"
39 #include "flv.h"
40 
41 #define VALIDATE_INDEX_TS_THRESH 2500
42 
43 #define RESYNC_BUFFER_SIZE (1<<20)
44 
45 #define MAX_DEPTH 16 ///< arbitrary limit to prevent unbounded recursion
46 
47 typedef struct FLVContext {
48  const AVClass *class; ///< Class for private options.
49  int trust_metadata; ///< configure streams according onMetaData
50  int trust_datasize; ///< trust data size of FLVTag
51  int dump_full_metadata; ///< Dump full metadata of the onMetadata
52  int wrong_dts; ///< wrong dts due to negative cts
57  struct {
58  int64_t dts;
59  int64_t pos;
60  } validate_index[2];
64 
66 
69 
72  int64_t video_bit_rate;
73  int64_t audio_bit_rate;
74  int64_t *keyframe_times;
78  int64_t last_ts;
79  int64_t time_offset;
80  int64_t time_pos;
81 } FLVContext;
82 
83 /* AMF date type */
84 typedef struct amf_date {
85  double milliseconds;
86  int16_t timezone;
87 } amf_date;
88 
89 static int probe(const AVProbeData *p, int live)
90 {
91  const uint8_t *d = p->buf;
92  unsigned offset = AV_RB32(d + 5);
93 
94  if (d[0] == 'F' &&
95  d[1] == 'L' &&
96  d[2] == 'V' &&
97  d[3] < 5 && d[5] == 0 &&
98  offset + 100 < p->buf_size &&
99  offset > 8) {
100  int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
101 
102  if (live == is_live)
103  return AVPROBE_SCORE_MAX;
104  }
105  return 0;
106 }
107 
108 static int flv_probe(const AVProbeData *p)
109 {
110  return probe(p, 0);
111 }
112 
113 static int live_flv_probe(const AVProbeData *p)
114 {
115  return probe(p, 1);
116 }
117 
118 static int kux_probe(const AVProbeData *p)
119 {
120  const uint8_t *d = p->buf;
121 
122  if (d[0] == 'K' &&
123  d[1] == 'D' &&
124  d[2] == 'K' &&
125  d[3] == 0 &&
126  d[4] == 0) {
127  return AVPROBE_SCORE_EXTENSION + 1;
128  }
129  return 0;
130 }
131 
133 {
134  FLVContext *flv = s->priv_data;
135  AVStream *stream = NULL;
136  unsigned int i = 0;
137 
138  if (flv->last_keyframe_stream_index < 0) {
139  av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
140  return;
141  }
142 
143  av_assert0(flv->last_keyframe_stream_index <= s->nb_streams);
144  stream = s->streams[flv->last_keyframe_stream_index];
145 
146  if (ffstream(stream)->nb_index_entries == 0) {
147  for (i = 0; i < flv->keyframe_count; i++) {
148  av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
151  flv->keyframe_times[i], 0, 0, AVINDEX_KEYFRAME);
152  }
153  } else
154  av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
155 
156  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
157  av_freep(&flv->keyframe_times);
159  flv->keyframe_count = 0;
160  }
161 }
162 
164 {
165  FLVContext *flv = s->priv_data;
167  if (!st)
168  return NULL;
170  if (s->nb_streams>=3 ||( s->nb_streams==2
171  && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
172  && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
173  && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_DATA
174  && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_DATA))
175  s->ctx_flags &= ~AVFMTCTX_NOHEADER;
177  st->codecpar->bit_rate = flv->audio_bit_rate;
179  }
181  st->codecpar->bit_rate = flv->video_bit_rate;
183  st->avg_frame_rate = flv->framerate;
184  }
185 
186 
187  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
188  flv->last_keyframe_stream_index = s->nb_streams - 1;
190  return st;
191 }
192 
194 {
195  int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
196  int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
197  int codec_id;
198 
199  if (!apar->codec_id && !apar->codec_tag)
200  return 1;
201 
202  if (apar->bits_per_coded_sample != bits_per_coded_sample)
203  return 0;
204 
205  switch (flv_codecid) {
206  // no distinction between S16 and S8 PCM codec flags
207  case FLV_CODECID_PCM:
208  codec_id = bits_per_coded_sample == 8
210 #if HAVE_BIGENDIAN
212 #else
214 #endif
215  return codec_id == apar->codec_id;
216  case FLV_CODECID_PCM_LE:
217  codec_id = bits_per_coded_sample == 8
220  return codec_id == apar->codec_id;
221  case FLV_CODECID_AAC:
222  return apar->codec_id == AV_CODEC_ID_AAC;
223  case FLV_CODECID_ADPCM:
224  return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
225  case FLV_CODECID_SPEEX:
226  return apar->codec_id == AV_CODEC_ID_SPEEX;
227  case FLV_CODECID_MP3:
228  return apar->codec_id == AV_CODEC_ID_MP3;
232  return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
234  return apar->sample_rate == 8000 &&
237  return apar->sample_rate == 8000 &&
239  default:
240  return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
241  }
242 }
243 
245  AVCodecParameters *apar, int flv_codecid)
246 {
247  switch (flv_codecid) {
248  // no distinction between S16 and S8 PCM codec flags
249  case FLV_CODECID_PCM:
250  apar->codec_id = apar->bits_per_coded_sample == 8
252 #if HAVE_BIGENDIAN
254 #else
256 #endif
257  break;
258  case FLV_CODECID_PCM_LE:
259  apar->codec_id = apar->bits_per_coded_sample == 8
262  break;
263  case FLV_CODECID_AAC:
264  apar->codec_id = AV_CODEC_ID_AAC;
265  break;
266  case FLV_CODECID_ADPCM:
268  break;
269  case FLV_CODECID_SPEEX:
270  apar->codec_id = AV_CODEC_ID_SPEEX;
271  apar->sample_rate = 16000;
272  break;
273  case FLV_CODECID_MP3:
274  apar->codec_id = AV_CODEC_ID_MP3;
276  break;
278  // in case metadata does not otherwise declare samplerate
279  apar->sample_rate = 8000;
281  break;
283  apar->sample_rate = 16000;
285  break;
288  break;
290  apar->sample_rate = 8000;
292  break;
294  apar->sample_rate = 8000;
296  break;
297  default:
298  avpriv_request_sample(s, "Audio codec (%x)",
299  flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
300  apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
301  }
302 }
303 
305 {
306  int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
307 
308  if (!vpar->codec_id && !vpar->codec_tag)
309  return 1;
310 
311  switch (flv_codecid) {
312  case FLV_CODECID_H263:
313  return vpar->codec_id == AV_CODEC_ID_FLV1;
314  case FLV_CODECID_SCREEN:
315  return vpar->codec_id == AV_CODEC_ID_FLASHSV;
316  case FLV_CODECID_SCREEN2:
317  return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
318  case FLV_CODECID_VP6:
319  return vpar->codec_id == AV_CODEC_ID_VP6F;
320  case FLV_CODECID_VP6A:
321  return vpar->codec_id == AV_CODEC_ID_VP6A;
322  case FLV_CODECID_H264:
323  return vpar->codec_id == AV_CODEC_ID_H264;
324  default:
325  return vpar->codec_tag == flv_codecid;
326  }
327 }
328 
330  int flv_codecid, int read)
331 {
332  FFStream *const vstreami = ffstream(vstream);
333  int ret = 0;
334  AVCodecParameters *par = vstream->codecpar;
335  enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
336  switch (flv_codecid) {
337  case FLV_CODECID_H263:
338  par->codec_id = AV_CODEC_ID_FLV1;
339  break;
341  par->codec_id = AV_CODEC_ID_H263;
342  break; // Really mean it this time
343  case FLV_CODECID_SCREEN:
345  break;
346  case FLV_CODECID_SCREEN2:
348  break;
349  case FLV_CODECID_VP6:
350  par->codec_id = AV_CODEC_ID_VP6F;
351  case FLV_CODECID_VP6A:
352  if (flv_codecid == FLV_CODECID_VP6A)
353  par->codec_id = AV_CODEC_ID_VP6A;
354  if (read) {
355  if (par->extradata_size != 1) {
356  ff_alloc_extradata(par, 1);
357  }
358  if (par->extradata)
359  par->extradata[0] = avio_r8(s->pb);
360  else
361  avio_skip(s->pb, 1);
362  }
363  ret = 1; // 1 byte body size adjustment for flv_read_packet()
364  break;
365  case FLV_CODECID_H264:
366  par->codec_id = AV_CODEC_ID_H264;
368  ret = 3; // not 4, reading packet type will consume one byte
369  break;
370  case FLV_CODECID_MPEG4:
372  ret = 3;
373  break;
374  default:
375  avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
376  par->codec_tag = flv_codecid;
377  }
378 
379  if (!vstreami->need_context_update && par->codec_id != old_codec_id) {
380  avpriv_request_sample(s, "Changing the codec id midstream");
381  return AVERROR_PATCHWELCOME;
382  }
383 
384  return ret;
385 }
386 
387 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
388 {
389  int ret;
390  int length = avio_rb16(ioc);
391  if (length >= buffsize) {
392  avio_skip(ioc, length);
393  return -1;
394  }
395 
396  ret = avio_read(ioc, buffer, length);
397  if (ret < 0)
398  return ret;
399  if (ret < length)
400  return AVERROR_INVALIDDATA;
401 
402  buffer[length] = '\0';
403 
404  return length;
405 }
406 
408 {
409  FLVContext *flv = s->priv_data;
410  unsigned int timeslen = 0, fileposlen = 0, i;
411  char str_val[256];
412  int64_t *times = NULL;
413  int64_t *filepositions = NULL;
414  int ret = AVERROR(ENOSYS);
415  int64_t initial_pos = avio_tell(ioc);
416 
417  if (flv->keyframe_count > 0) {
418  av_log(s, AV_LOG_DEBUG, "keyframes have been parsed\n");
419  return 0;
420  }
421  av_assert0(!flv->keyframe_times);
423 
424  if (s->flags & AVFMT_FLAG_IGNIDX)
425  return 0;
426 
427  while (avio_tell(ioc) < max_pos - 2 &&
428  amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
429  int64_t **current_array;
430  unsigned int arraylen;
431  int factor;
432 
433  // Expect array object in context
434  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
435  break;
436 
437  arraylen = avio_rb32(ioc);
438  if (arraylen>>28)
439  break;
440 
441  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
442  current_array = &times;
443  timeslen = arraylen;
444  factor = 1000;
445  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
446  !filepositions) {
447  current_array = &filepositions;
448  fileposlen = arraylen;
449  factor = 1;
450  } else
451  // unexpected metatag inside keyframes, will not use such
452  // metadata for indexing
453  break;
454 
455  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
456  ret = AVERROR(ENOMEM);
457  goto finish;
458  }
459 
460  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
461  double d;
462  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
463  goto invalid;
464  d = av_int2double(avio_rb64(ioc)) * factor;
465  if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
466  goto invalid;
467  if (avio_feof(ioc))
468  goto invalid;
469  current_array[0][i] = d;
470  }
471  if (times && filepositions) {
472  // All done, exiting at a position allowing amf_parse_object
473  // to finish parsing the object
474  ret = 0;
475  break;
476  }
477  }
478 
479  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
480  for (i = 0; i < FFMIN(2,fileposlen); i++) {
481  flv->validate_index[i].pos = filepositions[i];
482  flv->validate_index[i].dts = times[i];
483  flv->validate_count = i + 1;
484  }
485  flv->keyframe_times = times;
486  flv->keyframe_filepositions = filepositions;
487  flv->keyframe_count = timeslen;
488  times = NULL;
489  filepositions = NULL;
490  } else {
491 invalid:
492  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
493  }
494 
495 finish:
496  av_freep(&times);
497  av_freep(&filepositions);
498  avio_seek(ioc, initial_pos, SEEK_SET);
499  return ret;
500 }
501 
503  AVStream *vstream, const char *key,
504  int64_t max_pos, int depth)
505 {
506  AVCodecParameters *apar, *vpar;
507  FLVContext *flv = s->priv_data;
508  AVIOContext *ioc;
509  AMFDataType amf_type;
510  char str_val[1024];
511  double num_val;
512  amf_date date;
513 
514  if (depth > MAX_DEPTH)
515  return AVERROR_PATCHWELCOME;
516 
517  num_val = 0;
518  ioc = s->pb;
519  if (avio_feof(ioc))
520  return AVERROR_EOF;
521  amf_type = avio_r8(ioc);
522 
523  switch (amf_type) {
525  num_val = av_int2double(avio_rb64(ioc));
526  break;
527  case AMF_DATA_TYPE_BOOL:
528  num_val = avio_r8(ioc);
529  break;
531  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
532  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
533  return -1;
534  }
535  break;
537  if (key &&
538  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
539  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
540  if (parse_keyframes_index(s, ioc, max_pos) < 0)
541  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
542  else
544  while (avio_tell(ioc) < max_pos - 2 &&
545  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
546  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
547  depth + 1) < 0)
548  return -1; // if we couldn't skip, bomb out.
549  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
550  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
551  return -1;
552  }
553  break;
554  case AMF_DATA_TYPE_NULL:
557  break; // these take up no additional space
559  {
560  unsigned v;
561  avio_skip(ioc, 4); // skip 32-bit max array index
562  while (avio_tell(ioc) < max_pos - 2 &&
563  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
564  // this is the only case in which we would want a nested
565  // parse to not skip over the object
566  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
567  depth + 1) < 0)
568  return -1;
569  v = avio_r8(ioc);
570  if (v != AMF_END_OF_OBJECT) {
571  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
572  return -1;
573  }
574  break;
575  }
576  case AMF_DATA_TYPE_ARRAY:
577  {
578  unsigned int arraylen, i;
579 
580  arraylen = avio_rb32(ioc);
581  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
583  depth + 1) < 0)
584  return -1; // if we couldn't skip, bomb out.
585  }
586  break;
587  case AMF_DATA_TYPE_DATE:
588  // timestamp (double) and UTC offset (int16)
589  date.milliseconds = av_int2double(avio_rb64(ioc));
590  date.timezone = avio_rb16(ioc);
591  break;
592  default: // unsupported type, we couldn't skip
593  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
594  return -1;
595  }
596 
597  if (key) {
598  apar = astream ? astream->codecpar : NULL;
599  vpar = vstream ? vstream->codecpar : NULL;
600 
601  // stream info doesn't live any deeper than the first object
602  if (depth == 1) {
603  if (amf_type == AMF_DATA_TYPE_NUMBER ||
604  amf_type == AMF_DATA_TYPE_BOOL) {
605  if (!strcmp(key, "duration"))
606  s->duration = num_val * AV_TIME_BASE;
607  else if (!strcmp(key, "videodatarate") &&
608  0 <= (int)(num_val * 1024.0))
609  flv->video_bit_rate = num_val * 1024.0;
610  else if (!strcmp(key, "audiodatarate") &&
611  0 <= (int)(num_val * 1024.0))
612  flv->audio_bit_rate = num_val * 1024.0;
613  else if (!strcmp(key, "datastream")) {
615  if (!st)
616  return AVERROR(ENOMEM);
618  } else if (!strcmp(key, "framerate")) {
619  flv->framerate = av_d2q(num_val, 1000);
620  if (vstream)
621  vstream->avg_frame_rate = flv->framerate;
622  } else if (flv->trust_metadata) {
623  if (!strcmp(key, "videocodecid") && vpar) {
624  int ret = flv_set_video_codec(s, vstream, num_val, 0);
625  if (ret < 0)
626  return ret;
627  } else if (!strcmp(key, "audiocodecid") && apar) {
628  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
629  flv_set_audio_codec(s, astream, apar, id);
630  } else if (!strcmp(key, "audiosamplerate") && apar) {
631  apar->sample_rate = num_val;
632  } else if (!strcmp(key, "audiosamplesize") && apar) {
633  apar->bits_per_coded_sample = num_val;
634  } else if (!strcmp(key, "stereo") && apar) {
635  av_channel_layout_default(&apar->ch_layout, num_val + 1);
636  } else if (!strcmp(key, "width") && vpar) {
637  vpar->width = num_val;
638  } else if (!strcmp(key, "height") && vpar) {
639  vpar->height = num_val;
640  }
641  }
642  }
643  if (amf_type == AMF_DATA_TYPE_STRING) {
644  if (!strcmp(key, "encoder")) {
645  int version = -1;
646  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
647  if (version > 0 && version <= 655)
648  flv->broken_sizes = 1;
649  }
650  } else if (!strcmp(key, "metadatacreator")) {
651  if ( !strcmp (str_val, "MEGA")
652  || !strncmp(str_val, "FlixEngine", 10))
653  flv->broken_sizes = 1;
654  }
655  }
656  }
657 
658  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
659  ((!apar && !strcmp(key, "audiocodecid")) ||
660  (!vpar && !strcmp(key, "videocodecid"))))
661  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
662 
663  if ((!strcmp(key, "duration") ||
664  !strcmp(key, "filesize") ||
665  !strcmp(key, "width") ||
666  !strcmp(key, "height") ||
667  !strcmp(key, "videodatarate") ||
668  !strcmp(key, "framerate") ||
669  !strcmp(key, "videocodecid") ||
670  !strcmp(key, "audiodatarate") ||
671  !strcmp(key, "audiosamplerate") ||
672  !strcmp(key, "audiosamplesize") ||
673  !strcmp(key, "stereo") ||
674  !strcmp(key, "audiocodecid") ||
675  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
676  return 0;
677 
678  s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
679  if (amf_type == AMF_DATA_TYPE_BOOL) {
680  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
681  sizeof(str_val));
682  av_dict_set(&s->metadata, key, str_val, 0);
683  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
684  snprintf(str_val, sizeof(str_val), "%.f", num_val);
685  av_dict_set(&s->metadata, key, str_val, 0);
686  } else if (amf_type == AMF_DATA_TYPE_STRING) {
687  av_dict_set(&s->metadata, key, str_val, 0);
688  } else if ( amf_type == AMF_DATA_TYPE_DATE
689  && isfinite(date.milliseconds)
690  && date.milliseconds > INT64_MIN/1000
691  && date.milliseconds < INT64_MAX/1000
692  ) {
693  // timezone is ignored, since there is no easy way to offset the UTC
694  // timestamp into the specified timezone
695  avpriv_dict_set_timestamp(&s->metadata, key, 1000 * (int64_t)date.milliseconds);
696  }
697  }
698 
699  return 0;
700 }
701 
702 #define TYPE_ONTEXTDATA 1
703 #define TYPE_ONCAPTION 2
704 #define TYPE_ONCAPTIONINFO 3
705 #define TYPE_UNKNOWN 9
706 
707 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
708 {
709  FLVContext *flv = s->priv_data;
711  AVStream *stream, *astream, *vstream;
712  AVStream av_unused *dstream;
713  AVIOContext *ioc;
714  int i;
715  char buffer[32];
716 
717  astream = NULL;
718  vstream = NULL;
719  dstream = NULL;
720  ioc = s->pb;
721 
722  // first object needs to be "onMetaData" string
723  type = avio_r8(ioc);
724  if (type != AMF_DATA_TYPE_STRING ||
725  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
726  return TYPE_UNKNOWN;
727 
728  if (!strcmp(buffer, "onTextData"))
729  return TYPE_ONTEXTDATA;
730 
731  if (!strcmp(buffer, "onCaption"))
732  return TYPE_ONCAPTION;
733 
734  if (!strcmp(buffer, "onCaptionInfo"))
735  return TYPE_ONCAPTIONINFO;
736 
737  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint") && strcmp(buffer, "|RtmpSampleAccess")) {
738  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
739  return TYPE_UNKNOWN;
740  }
741 
742  // find the streams now so that amf_parse_object doesn't need to do
743  // the lookup every time it is called.
744  for (i = 0; i < s->nb_streams; i++) {
745  stream = s->streams[i];
746  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
747  vstream = stream;
749  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
750  astream = stream;
751  if (flv->last_keyframe_stream_index == -1)
753  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
754  dstream = stream;
755  }
756 
757  // parse the second object (we want a mixed array)
758  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
759  return -1;
760 
761  return 0;
762 }
763 
765 {
766  int flags;
767  FLVContext *flv = s->priv_data;
768  int offset;
769  int pre_tag_size = 0;
770 
771  /* Actual FLV data at 0xe40000 in KUX file */
772  if(!strcmp(s->iformat->name, "kux"))
773  avio_skip(s->pb, 0xe40000);
774 
775  avio_skip(s->pb, 4);
776  flags = avio_r8(s->pb);
777 
779 
780  s->ctx_flags |= AVFMTCTX_NOHEADER;
781 
782  offset = avio_rb32(s->pb);
783  avio_seek(s->pb, offset, SEEK_SET);
784 
785  /* Annex E. The FLV File Format
786  * E.3 TheFLVFileBody
787  * Field Type Comment
788  * PreviousTagSize0 UI32 Always 0
789  * */
790  pre_tag_size = avio_rb32(s->pb);
791  if (pre_tag_size) {
792  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
793  }
794 
795  s->start_time = 0;
796  flv->sum_flv_tag_size = 0;
797  flv->last_keyframe_stream_index = -1;
798 
799  return 0;
800 }
801 
803 {
804  int i;
805  FLVContext *flv = s->priv_data;
806  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
807  av_freep(&flv->new_extradata[i]);
808  av_freep(&flv->keyframe_times);
810  return 0;
811 }
812 
814 {
815  int ret;
816  if (!size)
817  return 0;
818 
819  if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
820  return ret;
821  ffstream(st)->need_context_update = 1;
822  return 0;
823 }
824 
825 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
826  int size)
827 {
828  if (!size)
829  return 0;
830 
831  av_free(flv->new_extradata[stream]);
832  flv->new_extradata[stream] = av_mallocz(size +
834  if (!flv->new_extradata[stream])
835  return AVERROR(ENOMEM);
836  flv->new_extradata_size[stream] = size;
837  avio_read(pb, flv->new_extradata[stream], size);
838  return 0;
839 }
840 
841 static void clear_index_entries(AVFormatContext *s, int64_t pos)
842 {
844  "Found invalid index entries, clearing the index.\n");
845  for (unsigned i = 0; i < s->nb_streams; i++) {
846  FFStream *const sti = ffstream(s->streams[i]);
847  int out = 0;
848  /* Remove all index entries that point to >= pos */
849  for (int j = 0; j < sti->nb_index_entries; j++)
850  if (sti->index_entries[j].pos < pos)
851  sti->index_entries[out++] = sti->index_entries[j];
852  sti->nb_index_entries = out;
853  }
854 }
855 
856 static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
857 {
858  int nb = -1, ret, parse_name = 1;
859 
860  if (depth > MAX_DEPTH)
861  return AVERROR_PATCHWELCOME;
862 
863  if (avio_feof(pb))
864  return AVERROR_EOF;
865 
866  switch (type) {
868  avio_skip(pb, 8);
869  break;
870  case AMF_DATA_TYPE_BOOL:
871  avio_skip(pb, 1);
872  break;
874  avio_skip(pb, avio_rb16(pb));
875  break;
876  case AMF_DATA_TYPE_ARRAY:
877  parse_name = 0;
879  nb = avio_rb32(pb);
880  if (nb < 0)
881  return AVERROR_INVALIDDATA;
883  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
884  if (parse_name) {
885  int size = avio_rb16(pb);
886  if (!size) {
887  avio_skip(pb, 1);
888  break;
889  }
890  avio_skip(pb, size);
891  }
892  if ((ret = amf_skip_tag(pb, avio_r8(pb), depth + 1)) < 0)
893  return ret;
894  }
895  break;
896  case AMF_DATA_TYPE_NULL:
898  break;
899  default:
900  return AVERROR_INVALIDDATA;
901  }
902  return 0;
903 }
904 
906  int64_t dts, int64_t next)
907 {
908  AVIOContext *pb = s->pb;
909  AVStream *st = NULL;
910  char buf[20];
911  int ret = AVERROR_INVALIDDATA;
912  int i, length = -1;
913  int array = 0;
914 
915  switch (avio_r8(pb)) {
916  case AMF_DATA_TYPE_ARRAY:
917  array = 1;
919  avio_seek(pb, 4, SEEK_CUR);
921  break;
922  default:
923  goto skip;
924  }
925 
926  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
927  AMFDataType type = avio_r8(pb);
928  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
929  length = avio_rb16(pb);
930  ret = av_get_packet(pb, pkt, length);
931  if (ret < 0)
932  goto skip;
933  else
934  break;
935  } else {
936  if ((ret = amf_skip_tag(pb, type, 0)) < 0)
937  goto skip;
938  }
939  }
940 
941  if (length < 0) {
943  goto skip;
944  }
945 
946  for (i = 0; i < s->nb_streams; i++) {
947  st = s->streams[i];
949  break;
950  }
951 
952  if (i == s->nb_streams) {
954  if (!st)
955  return AVERROR(ENOMEM);
957  }
958 
959  pkt->dts = dts;
960  pkt->pts = dts;
961  pkt->size = ret;
962 
963  pkt->stream_index = st->index;
965 
966 skip:
967  avio_seek(s->pb, next + 4, SEEK_SET);
968 
969  return ret;
970 }
971 
973 {
974  FLVContext *flv = s->priv_data;
975  int64_t i;
976  int64_t pos = avio_tell(s->pb);
977 
978  for (i=0; !avio_feof(s->pb); i++) {
979  int j = i & (RESYNC_BUFFER_SIZE-1);
980  int j1 = j + RESYNC_BUFFER_SIZE;
981  flv->resync_buffer[j ] =
982  flv->resync_buffer[j1] = avio_r8(s->pb);
983 
984  if (i >= 8 && pos) {
985  uint8_t *d = flv->resync_buffer + j1 - 8;
986  if (d[0] == 'F' &&
987  d[1] == 'L' &&
988  d[2] == 'V' &&
989  d[3] < 5 && d[5] == 0) {
990  av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", flv->last_ts);
991  flv->time_offset = flv->last_ts + 1;
992  flv->time_pos = avio_tell(s->pb);
993  }
994  }
995 
996  if (i > 22) {
997  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
998  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
999  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
1000  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
1001  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
1002  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
1003  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
1004  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
1005  return 1;
1006  }
1007  }
1008  }
1009  }
1010  }
1011  return AVERROR_EOF;
1012 }
1013 
1015 {
1016  FLVContext *flv = s->priv_data;
1017  int ret, i, size, flags;
1018  enum FlvTagType type;
1019  int stream_type=-1;
1020  int64_t next, pos, meta_pos;
1021  int64_t dts, pts = AV_NOPTS_VALUE;
1022  int av_uninit(channels);
1023  int av_uninit(sample_rate);
1024  AVStream *st = NULL;
1025  int last = -1;
1026  int orig_size;
1027 
1028 retry:
1029  /* pkt size is repeated at end. skip it */
1030  pos = avio_tell(s->pb);
1031  type = (avio_r8(s->pb) & 0x1F);
1032  orig_size =
1033  size = avio_rb24(s->pb);
1034  flv->sum_flv_tag_size += size + 11;
1035  dts = avio_rb24(s->pb);
1036  dts |= (unsigned)avio_r8(s->pb) << 24;
1037  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));
1038  if (avio_feof(s->pb))
1039  return AVERROR_EOF;
1040  avio_skip(s->pb, 3); /* stream id, always 0 */
1041  flags = 0;
1042 
1043  if (flv->validate_next < flv->validate_count) {
1044  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
1045  if (pos == validate_pos) {
1046  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
1048  flv->validate_next++;
1049  } else {
1050  clear_index_entries(s, validate_pos);
1051  flv->validate_count = 0;
1052  }
1053  } else if (pos > validate_pos) {
1054  clear_index_entries(s, validate_pos);
1055  flv->validate_count = 0;
1056  }
1057  }
1058 
1059  if (size == 0) {
1060  ret = FFERROR_REDO;
1061  goto leave;
1062  }
1063 
1064  next = size + avio_tell(s->pb);
1065 
1066  if (type == FLV_TAG_TYPE_AUDIO) {
1067  stream_type = FLV_STREAM_TYPE_AUDIO;
1068  flags = avio_r8(s->pb);
1069  size--;
1070  } else if (type == FLV_TAG_TYPE_VIDEO) {
1071  stream_type = FLV_STREAM_TYPE_VIDEO;
1072  flags = avio_r8(s->pb);
1073  size--;
1075  goto skip;
1076  } else if (type == FLV_TAG_TYPE_META) {
1077  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1078  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1079  int type;
1080  meta_pos = avio_tell(s->pb);
1081  type = flv_read_metabody(s, next);
1082  if (type == 0 && dts == 0 || type < 0) {
1083  if (type < 0 && flv->validate_count &&
1084  flv->validate_index[0].pos > next &&
1085  flv->validate_index[0].pos - 4 < next) {
1086  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1087  next = flv->validate_index[0].pos - 4;
1088  }
1089  goto skip;
1090  } else if (type == TYPE_ONTEXTDATA) {
1091  avpriv_request_sample(s, "OnTextData packet");
1092  return flv_data_packet(s, pkt, dts, next);
1093  } else if (type == TYPE_ONCAPTION) {
1094  return flv_data_packet(s, pkt, dts, next);
1095  } else if (type == TYPE_UNKNOWN) {
1096  stream_type = FLV_STREAM_TYPE_DATA;
1097  }
1098  avio_seek(s->pb, meta_pos, SEEK_SET);
1099  }
1100  } else {
1102  "Skipping flv packet: type %d, size %d, flags %d.\n",
1103  type, size, flags);
1104 skip:
1105  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1106  // This can happen if flv_read_metabody above read past
1107  // next, on a non-seekable input, and the preceding data has
1108  // been flushed out from the IO buffer.
1109  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1110  return AVERROR_INVALIDDATA;
1111  }
1112  ret = FFERROR_REDO;
1113  goto leave;
1114  }
1115 
1116  /* skip empty data packets */
1117  if (!size) {
1118  ret = FFERROR_REDO;
1119  goto leave;
1120  }
1121 
1122  /* now find stream */
1123  for (i = 0; i < s->nb_streams; i++) {
1124  st = s->streams[i];
1125  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1126  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1127  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1128  break;
1129  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1130  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1131  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1132  break;
1133  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1135  break;
1136  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1138  break;
1139  }
1140  }
1141  if (i == s->nb_streams) {
1143  st = create_stream(s, stream_types[stream_type]);
1144  if (!st)
1145  return AVERROR(ENOMEM);
1146  }
1147  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1148 
1149  if (flv->time_pos <= pos) {
1150  dts += flv->time_offset;
1151  }
1152 
1153  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1155  stream_type == FLV_STREAM_TYPE_AUDIO))
1157 
1158  if ((st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || stream_type == FLV_STREAM_TYPE_AUDIO)) ||
1160  st->discard >= AVDISCARD_ALL) {
1161  avio_seek(s->pb, next, SEEK_SET);
1162  ret = FFERROR_REDO;
1163  goto leave;
1164  }
1165 
1166  // if not streamed and no duration from metadata then seek to end to find
1167  // the duration from the timestamps
1168  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1169  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1170  !flv->searched_for_end) {
1171  int size;
1172  const int64_t pos = avio_tell(s->pb);
1173  // Read the last 4 bytes of the file, this should be the size of the
1174  // previous FLV tag. Use the timestamp of its payload as duration.
1175  int64_t fsize = avio_size(s->pb);
1176 retry_duration:
1177  avio_seek(s->pb, fsize - 4, SEEK_SET);
1178  size = avio_rb32(s->pb);
1179  if (size > 0 && size < fsize) {
1180  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1181  // but skip the byte indicating the type.
1182  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1183  if (size == avio_rb24(s->pb) + 11) {
1184  uint32_t ts = avio_rb24(s->pb);
1185  ts |= (unsigned)avio_r8(s->pb) << 24;
1186  if (ts)
1187  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1188  else if (fsize >= 8 && fsize - 8 >= size) {
1189  fsize -= size+4;
1190  goto retry_duration;
1191  }
1192  }
1193  }
1194 
1195  avio_seek(s->pb, pos, SEEK_SET);
1196  flv->searched_for_end = 1;
1197  }
1198 
1199  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1200  int bits_per_coded_sample;
1202  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1204  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1206  !st->codecpar->sample_rate ||
1210  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1211  }
1212  if (!st->codecpar->codec_id) {
1213  flv_set_audio_codec(s, st, st->codecpar,
1215  flv->last_sample_rate =
1217  flv->last_channels =
1219  } else {
1221  if (!par) {
1222  ret = AVERROR(ENOMEM);
1223  goto leave;
1224  }
1225  par->sample_rate = sample_rate;
1226  par->bits_per_coded_sample = bits_per_coded_sample;
1228  sample_rate = par->sample_rate;
1230  }
1231  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1233  if (ret < 0)
1234  return ret;
1235  size -= ret;
1236  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1238  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1239  st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1240  }
1241 
1242  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1245  int type = avio_r8(s->pb);
1246  size--;
1247 
1248  if (size < 0) {
1250  goto leave;
1251  }
1252 
1254  // sign extension
1255  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1256  pts = av_sat_add64(dts, cts);
1257  if (cts < 0) { // dts might be wrong
1258  if (!flv->wrong_dts)
1260  "Negative cts, previous timestamps might be wrong.\n");
1261  flv->wrong_dts = 1;
1262  } else if (FFABS(dts - pts) > 1000*60*15) {
1264  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1265  dts = pts = AV_NOPTS_VALUE;
1266  }
1267  }
1268  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1269  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1270  AVDictionaryEntry *t;
1271 
1272  if (st->codecpar->extradata) {
1273  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1274  return ret;
1275  ret = FFERROR_REDO;
1276  goto leave;
1277  }
1278  if ((ret = flv_get_extradata(s, st, size)) < 0)
1279  return ret;
1280 
1281  /* Workaround for buggy Omnia A/XE encoder */
1282  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1283  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1284  st->codecpar->extradata_size = 2;
1285 
1286  ret = FFERROR_REDO;
1287  goto leave;
1288  }
1289  }
1290 
1291  /* skip empty data packets */
1292  if (!size) {
1293  ret = FFERROR_REDO;
1294  goto leave;
1295  }
1296 
1297  ret = av_get_packet(s->pb, pkt, size);
1298  if (ret < 0)
1299  return ret;
1300  pkt->dts = dts;
1301  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1302  pkt->stream_index = st->index;
1303  pkt->pos = pos;
1304  if (flv->new_extradata[stream_type]) {
1306  flv->new_extradata[stream_type],
1307  flv->new_extradata_size[stream_type]);
1308  if (ret >= 0) {
1309  flv->new_extradata[stream_type] = NULL;
1310  flv->new_extradata_size[stream_type] = 0;
1311  }
1312  }
1313  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1314  (sample_rate != flv->last_sample_rate ||
1315  channels != flv->last_channels)) {
1317  flv->last_channels = channels;
1319  }
1320 
1321  if (stream_type == FLV_STREAM_TYPE_AUDIO ||
1323  stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1324  stream_type == FLV_STREAM_TYPE_DATA)
1326 
1327 leave:
1328  last = avio_rb32(s->pb);
1329  if (!flv->trust_datasize) {
1330  if (last != orig_size + 11 && last != orig_size + 10 &&
1331  !avio_feof(s->pb) &&
1332  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1333  !flv->broken_sizes) {
1334  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1335  avio_seek(s->pb, pos + 1, SEEK_SET);
1336  ret = resync(s);
1338  if (ret >= 0) {
1339  goto retry;
1340  }
1341  }
1342  }
1343 
1344  if (ret >= 0)
1345  flv->last_ts = pkt->dts;
1346 
1347  return ret;
1348 }
1349 
1350 static int flv_read_seek(AVFormatContext *s, int stream_index,
1351  int64_t ts, int flags)
1352 {
1353  FLVContext *flv = s->priv_data;
1354  flv->validate_count = 0;
1355  return avio_seek_time(s->pb, stream_index, ts, flags);
1356 }
1357 
1358 #define OFFSET(x) offsetof(FLVContext, x)
1359 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1360 static const AVOption options[] = {
1361  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1362  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1363  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1364  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1365  { NULL }
1366 };
1367 
1368 static const AVClass flv_kux_class = {
1369  .class_name = "(live) flv/kux demuxer",
1370  .item_name = av_default_item_name,
1371  .option = options,
1372  .version = LIBAVUTIL_VERSION_INT,
1373 };
1374 
1376  .name = "flv",
1377  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1378  .priv_data_size = sizeof(FLVContext),
1379  .read_probe = flv_probe,
1384  .extensions = "flv",
1385  .priv_class = &flv_kux_class,
1386 };
1387 
1389  .name = "live_flv",
1390  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1391  .priv_data_size = sizeof(FLVContext),
1397  .extensions = "flv",
1398  .priv_class = &flv_kux_class,
1400 };
1401 
1403  .name = "kux",
1404  .long_name = NULL_IF_CONFIG_SMALL("KUX (YouKu)"),
1405  .priv_data_size = sizeof(FLVContext),
1406  .read_probe = kux_probe,
1411  .extensions = "kux",
1412  .priv_class = &flv_kux_class,
1413 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:320
FLV_STREAM_TYPE_VIDEO
@ FLV_STREAM_TYPE_VIDEO
Definition: flv.h:66
FLVContext::audio_bit_rate
int64_t audio_bit_rate
Definition: flvdec.c:73
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
AMF_DATA_TYPE_OBJECT_END
@ AMF_DATA_TYPE_OBJECT_END
Definition: flv.h:132
AMF_END_OF_OBJECT
#define AMF_END_OF_OBJECT
Definition: flv.h:47
AVMEDIA_TYPE_SUBTITLE
@ AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:142
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:75
flv_same_video_codec
static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
Definition: flvdec.c:304
FLV_CODECID_MPEG4
@ FLV_CODECID_MPEG4
Definition: flv.h:112
FLV_TAG_TYPE_VIDEO
@ FLV_TAG_TYPE_VIDEO
Definition: flv.h:61
FLVContext::pos
int64_t pos
Definition: flvdec.c:59
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
AV_OPT_FLAG_READONLY
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:294
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
clear_index_entries
static void clear_index_entries(AVFormatContext *s, int64_t pos)
Definition: flvdec.c:841
FLVContext::validate_next
int validate_next
Definition: flvdec.c:61
FLV_CODECID_PCM
@ FLV_CODECID_PCM
Definition: flv.h:91
out
FILE * out
Definition: movenc.c:54
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:53
AVFMT_FLAG_IGNIDX
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1333
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVStream::discard
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:1010
av_int2double
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
TYPE_ONCAPTIONINFO
#define TYPE_ONCAPTIONINFO
Definition: flvdec.c:704
flv_data_packet
static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, int64_t dts, int64_t next)
Definition: flvdec.c:905
av_unused
#define av_unused
Definition: attributes.h:131
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: codec_id.h:62
FLVContext::time_offset
int64_t time_offset
Definition: flvdec.c:79
FLV_CODECID_MP3
@ FLV_CODECID_MP3
Definition: flv.h:93
FLVContext::trust_metadata
int trust_metadata
configure streams according onMetaData
Definition: flvdec.c:49
FLV_CODECID_SPEEX
@ FLV_CODECID_SPEEX
Definition: flv.h:101
flv_read_packet
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvdec.c:1014
FLV_CODECID_VP6
@ FLV_CODECID_VP6
Definition: flv.h:107
TYPE_ONCAPTION
#define TYPE_ONCAPTION
Definition: flvdec.c:703
AVOption
AVOption.
Definition: opt.h:251
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:1028
FLVContext::resync_buffer
uint8_t resync_buffer[2 *RESYNC_BUFFER_SIZE]
Definition: flvdec.c:65
amf_date
Definition: flvdec.c:84
avcodec_parameters_free
void avcodec_parameters_free(AVCodecParameters **ppar)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
Definition: codec_par.c:63
AMF_DATA_TYPE_UNDEFINED
@ AMF_DATA_TYPE_UNDEFINED
Definition: flv.h:129
FLV_STEREO
@ FLV_STEREO
Definition: flv.h:75
AMF_DATA_TYPE_DATE
@ AMF_DATA_TYPE_DATE
Definition: flv.h:134
flv_set_audio_codec
static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecParameters *apar, int flv_codecid)
Definition: flvdec.c:244
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:65
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:456
FLV_CODECID_ADPCM
@ FLV_CODECID_ADPCM
Definition: flv.h:92
FLVContext::trust_datasize
int trust_datasize
trust data size of FLVTag
Definition: flvdec.c:50
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
intfloat.h
codec_type
enum AVMediaType codec_type
Definition: rtp.c:37
AMF_DATA_TYPE_OBJECT
@ AMF_DATA_TYPE_OBJECT
Definition: flv.h:127
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:352
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
sample_rate
sample_rate
Definition: ffmpeg_filter.c:155
FLV_CODECID_H263
@ FLV_CODECID_H263
Definition: flv.h:105
options
static const AVOption options[]
Definition: flvdec.c:1360
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:815
ff_get_extradata
int ff_get_extradata(void *logctx, 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: demux_utils.c:355
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
FLVContext::video_bit_rate
int64_t video_bit_rate
Definition: flvdec.c:72
FLVContext::searched_for_end
int searched_for_end
Definition: flvdec.c:63
FLVContext::keyframe_times
int64_t * keyframe_times
Definition: flvdec.c:74
FLVContext::keyframe_filepositions
int64_t * keyframe_filepositions
Definition: flvdec.c:75
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:763
finish
static void finish(void)
Definition: movenc.c:342
OFFSET
#define OFFSET(x)
Definition: flvdec.c:1358
av_packet_add_side_data
int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
Definition: avpacket.c:196
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:464
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:407
FLVContext::last_ts
int64_t last_ts
Definition: flvdec.c:78
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:321
avio_seek_time
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:1336
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
av_add_index_entry
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: seek.c:118
FLV_CODECID_REALH263
@ FLV_CODECID_REALH263
Definition: flv.h:111
TYPE_ONTEXTDATA
#define TYPE_ONTEXTDATA
Definition: flvdec.c:702
flv_read_seek
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1350
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:505
ff_live_flv_demuxer
const AVInputFormat ff_live_flv_demuxer
Definition: flvdec.c:1388
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
pts
static int64_t pts
Definition: transcode_aac.c:654
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:430
FLV_AUDIO_CODECID_OFFSET
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
FLV_CODECID_PCM_LE
@ FLV_CODECID_PCM_LE
Definition: flv.h:94
FLV_CODECID_PCM_ALAW
@ FLV_CODECID_PCM_ALAW
Definition: flv.h:98
VD
#define VD
Definition: flvdec.c:1359
avassert.h
AMFDataType
AMFDataType
Definition: flv.h:123
parse_keyframes_index
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
Definition: flvdec.c:407
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:206
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:656
VALIDATE_INDEX_TS_THRESH
#define VALIDATE_INDEX_TS_THRESH
Definition: flvdec.c:41
FLV_FRAME_VIDEO_INFO_CMD
@ FLV_FRAME_VIDEO_INFO_CMD
video info/command frame
Definition: flv.h:120
FLV_FRAME_KEY
@ FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
Definition: flv.h:116
FLVContext::sum_flv_tag_size
int sum_flv_tag_size
Definition: flvdec.c:68
av_dict_get
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
FLVContext::new_extradata_size
int new_extradata_size[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:54
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
AMF_DATA_TYPE_UNSUPPORTED
@ AMF_DATA_TYPE_UNSUPPORTED
Definition: flv.h:136
ff_kux_demuxer
const AVInputFormat ff_kux_demuxer
Definition: flvdec.c:1402
FLV_FRAME_DISP_INTER
@ FLV_FRAME_DISP_INTER
disposable inter frame (H.263 only)
Definition: flv.h:118
FLV_STREAM_TYPE_NB
@ FLV_STREAM_TYPE_NB
Definition: flv.h:70
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:127
create_stream
static AVStream * create_stream(AVFormatContext *s, int codec_type)
Definition: flvdec.c:163
FLV_CODECID_AAC
@ FLV_CODECID_AAC
Definition: flv.h:100
FLVContext::dts
int64_t dts
Definition: flvdec.c:58
amf_skip_tag
static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
Definition: flvdec.c:856
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
FLV_AUDIO_CHANNEL_MASK
#define FLV_AUDIO_CHANNEL_MASK
Definition: flv.h:39
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
channels
channels
Definition: aptx.h:32
FLVContext::time_pos
int64_t time_pos
Definition: flvdec.c:80
isfinite
#define isfinite(x)
Definition: libm.h:359
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:326
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:374
live_flv_probe
static int live_flv_probe(const AVProbeData *p)
Definition: flvdec.c:113
KEYFRAMES_TIMESTAMP_TAG
#define KEYFRAMES_TIMESTAMP_TAG
Definition: flv.h:50
key
const char * key
Definition: hwcontext_opencl.c:174
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
FLV_VIDEO_FRAMETYPE_MASK
#define FLV_VIDEO_FRAMETYPE_MASK
Definition: flv.h:45
fsize
static int64_t fsize(FILE *f)
Definition: audiomatch.c:29
AVDISCARD_BIDIR
@ AVDISCARD_BIDIR
discard all bidirectional frames
Definition: defs.h:51
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: codec_id.h:77
TYPE_UNKNOWN
#define TYPE_UNKNOWN
Definition: flvdec.c:705
flv_set_video_codec
static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read)
Definition: flvdec.c:329
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:64
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:380
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:327
flv_read_close
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:802
AV_CODEC_ID_FLASHSV2
@ AV_CODEC_ID_FLASHSV2
Definition: codec_id.h:181
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:532
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
add_keyframes_index
static void add_keyframes_index(AVFormatContext *s)
Definition: flvdec.c:132
NULL
#define NULL
Definition: coverity.c:32
FLV_STREAM_TYPE_SUBTITLE
@ FLV_STREAM_TYPE_SUBTITLE
Definition: flv.h:68
ff_flv_demuxer
const AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1375
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1164
AMF_DATA_TYPE_BOOL
@ AMF_DATA_TYPE_BOOL
Definition: flv.h:125
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
flv_read_header
static int flv_read_header(AVFormatContext *s)
Definition: flvdec.c:764
isnan
#define isnan(x)
Definition: libm.h:340
flv_same_audio_codec
static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
Definition: flvdec.c:193
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:937
FLV_CODECID_VP6A
@ FLV_CODECID_VP6A
Definition: flv.h:108
FFStream::nb_index_entries
int nb_index_entries
Definition: internal.h:254
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
av_channel_layout_default
void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels)
Get the default channel layout for a given number of channels.
Definition: channel_layout.c:960
flv.h
FLVContext::last_channels
int last_channels
Definition: flvdec.c:56
AMF_DATA_TYPE_ARRAY
@ AMF_DATA_TYPE_ARRAY
Definition: flv.h:133
FLV_HEADER_FLAG_HASAUDIO
@ FLV_HEADER_FLAG_HASAUDIO
Definition: flv.h:56
AV_CODEC_ID_FLASHSV
@ AV_CODEC_ID_FLASHSV
Definition: codec_id.h:136
FLVContext::keyframe_count
int keyframe_count
Definition: flvdec.c:71
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: codec_id.h:156
FLV_CODECID_NELLYMOSER_16KHZ_MONO
@ FLV_CODECID_NELLYMOSER_16KHZ_MONO
Definition: flv.h:95
FLVContext::validate_index
struct FLVContext::@267 validate_index[2]
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:463
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
FLVContext::missing_streams
int missing_streams
Definition: flvdec.c:76
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:79
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:431
AVDISCARD_NONKEY
@ AVDISCARD_NONKEY
discard all frames except keyframes
Definition: defs.h:53
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:783
AVMediaType
AVMediaType
Definition: avutil.h:199
FLV_CODECID_NELLYMOSER_8KHZ_MONO
@ FLV_CODECID_NELLYMOSER_8KHZ_MONO
Definition: flv.h:96
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
KEYFRAMES_BYTEOFFSET_TAG
#define KEYFRAMES_BYTEOFFSET_TAG
Definition: flv.h:51
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:263
FFStream
Definition: internal.h:197
AV_CODEC_ID_H263
@ AV_CODEC_ID_H263
Definition: codec_id.h:54
AV_CODEC_ID_ADPCM_SWF
@ AV_CODEC_ID_ADPCM_SWF
Definition: codec_id.h:372
size
int size
Definition: twinvq_data.h:10344
ff_add_param_change
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: demux_utils.c:151
FLVContext
Definition: flvdec.c:47
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
FLV_TAG_TYPE_AUDIO
@ FLV_TAG_TYPE_AUDIO
Definition: flv.h:60
MAX_DEPTH
#define MAX_DEPTH
arbitrary limit to prevent unbounded recursion
Definition: flvdec.c:45
amf_date::timezone
int16_t timezone
Definition: flvdec.c:86
KEYFRAMES_TAG
#define KEYFRAMES_TAG
Definition: flv.h:49
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:632
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
version
version
Definition: libkvazaar.c:313
FLV_CODECID_SCREEN
@ FLV_CODECID_SCREEN
Definition: flv.h:106
FFERROR_REDO
#define FFERROR_REDO
Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data).
Definition: demux.h:62
kux_probe
static int kux_probe(const AVProbeData *p)
Definition: flvdec.c:118
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
FLVContext::last_keyframe_stream_index
int last_keyframe_stream_index
Definition: flvdec.c:70
flv_read_metabody
static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
Definition: flvdec.c:707
internal.h
av_channel_layout_check
int av_channel_layout_check(const AVChannelLayout *channel_layout)
Check whether a channel layout is valid, i.e.
Definition: channel_layout.c:904
AVCodecParameters::height
int height
Definition: codec_par.h:128
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
resync
static int resync(AVFormatContext *s)
Definition: flvdec.c:972
FLVContext::framerate
AVRational framerate
Definition: flvdec.c:77
flv_probe
static int flv_probe(const AVProbeData *p)
Definition: flvdec.c:108
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_d2q
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
FLV_AUDIO_SAMPLERATE_OFFSET
#define FLV_AUDIO_SAMPLERATE_OFFSET
Definition: flv.h:33
avcodec_parameters_alloc
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
Definition: codec_par.c:53
demux.h
FLVContext::wrong_dts
int wrong_dts
wrong dts due to negative cts
Definition: flvdec.c:52
flv_queue_extradata
static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, int size)
Definition: flvdec.c:825
AMF_DATA_TYPE_MIXEDARRAY
@ AMF_DATA_TYPE_MIXEDARRAY
Definition: flv.h:131
av_get_packet
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:102
AMF_DATA_TYPE_STRING
@ AMF_DATA_TYPE_STRING
Definition: flv.h:126
FLVContext::new_extradata
uint8_t * new_extradata[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:53
av_uninit
#define av_uninit(x)
Definition: attributes.h:154
array
static int array[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:111
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
probe
static int probe(const AVProbeData *p, int live)
Definition: flvdec.c:89
flv_kux_class
static const AVClass flv_kux_class
Definition: flvdec.c:1368
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:71
FLV_STREAM_TYPE_AUDIO
@ FLV_STREAM_TYPE_AUDIO
Definition: flv.h:67
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
AVSTREAM_PARSE_HEADERS
@ AVSTREAM_PARSE_HEADERS
Only parse headers, do not repack.
Definition: avformat.h:799
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
dict.h
AV_CODEC_ID_TEXT
@ AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: codec_id.h:531
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
amf_get_string
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
Definition: flvdec.c:387
av_sat_add64
#define av_sat_add64
Definition: common.h:137
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:956
channel_layout.h
AV_OPT_FLAG_EXPORT
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:289
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:56
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
FLV_TAG_TYPE_META
@ FLV_TAG_TYPE_META
Definition: flv.h:62
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
amf_parse_object
static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth)
Definition: flvdec.c:502
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:808
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:240
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
FLV_CODECID_NELLYMOSER
@ FLV_CODECID_NELLYMOSER
Definition: flv.h:97
factor
static const int factor[16]
Definition: vf_pp7.c:76
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:252
FLV_HEADER_FLAG_HASVIDEO
@ FLV_HEADER_FLAG_HASVIDEO
Definition: flv.h:55
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:103
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:483
FLV_CODECID_SCREEN2
@ FLV_CODECID_SCREEN2
Definition: flv.h:109
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:325
FLV_STREAM_TYPE_DATA
@ FLV_STREAM_TYPE_DATA
Definition: flv.h:69
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
flv_get_extradata
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
Definition: flvdec.c:813
AMF_DATA_TYPE_NUMBER
@ AMF_DATA_TYPE_NUMBER
Definition: flv.h:124
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVDictionaryEntry
Definition: dict.h:79
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
FLV_AUDIO_CODECID_MASK
#define FLV_AUDIO_CODECID_MASK
Definition: flv.h:42
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
FLV_AUDIO_SAMPLERATE_MASK
#define FLV_AUDIO_SAMPLERATE_MASK
Definition: flv.h:41
d
d
Definition: ffmpeg_filter.c:155
int32_t
int32_t
Definition: audioconvert.c:56
FLV_VIDEO_CODECID_MASK
#define FLV_VIDEO_CODECID_MASK
Definition: flv.h:44
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:798
FLV_CODECID_H264
@ FLV_CODECID_H264
Definition: flv.h:110
FFStream::need_context_update
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:241
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_strlcpy
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:86
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:90
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
FLV_CODECID_PCM_MULAW
@ FLV_CODECID_PCM_MULAW
Definition: flv.h:99
FLVContext::validate_count
int validate_count
Definition: flvdec.c:62
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
FLV_AUDIO_SAMPLESIZE_MASK
#define FLV_AUDIO_SAMPLESIZE_MASK
Definition: flv.h:40
AVDictionaryEntry::value
char * value
Definition: dict.h:81
avstring.h
FlvTagType
FlvTagType
Definition: flv.h:59
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: codec_id.h:71
amf_date::milliseconds
double milliseconds
Definition: flvdec.c:85
AV_RB24
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:97
int
int
Definition: ffmpeg_filter.c:155
snprintf
#define snprintf
Definition: snprintf.h:34
FLVContext::dump_full_metadata
int dump_full_metadata
Dump full metadata of the onMetadata.
Definition: flvdec.c:51
avpriv_dict_set_timestamp
int avpriv_dict_set_timestamp(AVDictionary **dict, const char *key, int64_t timestamp)
Set a dictionary value to an ISO-8601 compliant timestamp string.
Definition: dict.c:258
FLVContext::last_sample_rate
int last_sample_rate
Definition: flvdec.c:55
max_pos
static const int32_t max_pos[4]
Size of the MP-MLQ fixed excitation codebooks.
Definition: g723_1dec.c:98
AMF_DATA_TYPE_NULL
@ AMF_DATA_TYPE_NULL
Definition: flv.h:128
AVFMT_EVENT_FLAG_METADATA_UPDATED
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1530
RESYNC_BUFFER_SIZE
#define RESYNC_BUFFER_SIZE
Definition: flvdec.c:43
AV_CODEC_ID_NELLYMOSER
@ AV_CODEC_ID_NELLYMOSER
Definition: codec_id.h:462
FLVContext::broken_sizes
int broken_sizes
Definition: flvdec.c:67
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:238
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375