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",
149  flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000);
151  flv->keyframe_times[i] * 1000, 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 
432  // Expect array object in context
433  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
434  break;
435 
436  arraylen = avio_rb32(ioc);
437  if (arraylen>>28)
438  break;
439 
440  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
441  current_array = &times;
442  timeslen = arraylen;
443  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
444  !filepositions) {
445  current_array = &filepositions;
446  fileposlen = arraylen;
447  } else
448  // unexpected metatag inside keyframes, will not use such
449  // metadata for indexing
450  break;
451 
452  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
453  ret = AVERROR(ENOMEM);
454  goto finish;
455  }
456 
457  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
458  double d;
459  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
460  goto invalid;
461  d = av_int2double(avio_rb64(ioc));
462  if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
463  goto invalid;
464  if (current_array == &times && (d <= INT64_MIN / 1000 || d >= INT64_MAX / 1000))
465  goto invalid;
466  current_array[0][i] = d;
467  }
468  if (times && filepositions) {
469  // All done, exiting at a position allowing amf_parse_object
470  // to finish parsing the object
471  ret = 0;
472  break;
473  }
474  }
475 
476  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
477  for (i = 0; i < FFMIN(2,fileposlen); i++) {
478  flv->validate_index[i].pos = filepositions[i];
479  flv->validate_index[i].dts = times[i] * 1000;
480  flv->validate_count = i + 1;
481  }
482  flv->keyframe_times = times;
483  flv->keyframe_filepositions = filepositions;
484  flv->keyframe_count = timeslen;
485  times = NULL;
486  filepositions = NULL;
487  } else {
488 invalid:
489  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
490  }
491 
492 finish:
493  av_freep(&times);
494  av_freep(&filepositions);
495  avio_seek(ioc, initial_pos, SEEK_SET);
496  return ret;
497 }
498 
500  AVStream *vstream, const char *key,
501  int64_t max_pos, int depth)
502 {
503  AVCodecParameters *apar, *vpar;
504  FLVContext *flv = s->priv_data;
505  AVIOContext *ioc;
506  AMFDataType amf_type;
507  char str_val[1024];
508  double num_val;
509  amf_date date;
510 
511  if (depth > MAX_DEPTH)
512  return AVERROR_PATCHWELCOME;
513 
514  num_val = 0;
515  ioc = s->pb;
516  if (avio_feof(ioc))
517  return AVERROR_EOF;
518  amf_type = avio_r8(ioc);
519 
520  switch (amf_type) {
522  num_val = av_int2double(avio_rb64(ioc));
523  break;
524  case AMF_DATA_TYPE_BOOL:
525  num_val = avio_r8(ioc);
526  break;
528  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
529  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
530  return -1;
531  }
532  break;
534  if (key &&
535  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
536  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
537  if (parse_keyframes_index(s, ioc, max_pos) < 0)
538  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
539  else
541  while (avio_tell(ioc) < max_pos - 2 &&
542  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
543  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
544  depth + 1) < 0)
545  return -1; // if we couldn't skip, bomb out.
546  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
547  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
548  return -1;
549  }
550  break;
551  case AMF_DATA_TYPE_NULL:
554  break; // these take up no additional space
556  {
557  unsigned v;
558  avio_skip(ioc, 4); // skip 32-bit max array index
559  while (avio_tell(ioc) < max_pos - 2 &&
560  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
561  // this is the only case in which we would want a nested
562  // parse to not skip over the object
563  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
564  depth + 1) < 0)
565  return -1;
566  v = avio_r8(ioc);
567  if (v != AMF_END_OF_OBJECT) {
568  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
569  return -1;
570  }
571  break;
572  }
573  case AMF_DATA_TYPE_ARRAY:
574  {
575  unsigned int arraylen, i;
576 
577  arraylen = avio_rb32(ioc);
578  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
580  depth + 1) < 0)
581  return -1; // if we couldn't skip, bomb out.
582  }
583  break;
584  case AMF_DATA_TYPE_DATE:
585  // timestamp (double) and UTC offset (int16)
586  date.milliseconds = av_int2double(avio_rb64(ioc));
587  date.timezone = avio_rb16(ioc);
588  break;
589  default: // unsupported type, we couldn't skip
590  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
591  return -1;
592  }
593 
594  if (key) {
595  apar = astream ? astream->codecpar : NULL;
596  vpar = vstream ? vstream->codecpar : NULL;
597 
598  // stream info doesn't live any deeper than the first object
599  if (depth == 1) {
600  if (amf_type == AMF_DATA_TYPE_NUMBER ||
601  amf_type == AMF_DATA_TYPE_BOOL) {
602  if (!strcmp(key, "duration"))
603  s->duration = num_val * AV_TIME_BASE;
604  else if (!strcmp(key, "videodatarate") &&
605  0 <= (int)(num_val * 1024.0))
606  flv->video_bit_rate = num_val * 1024.0;
607  else if (!strcmp(key, "audiodatarate") &&
608  0 <= (int)(num_val * 1024.0))
609  flv->audio_bit_rate = num_val * 1024.0;
610  else if (!strcmp(key, "datastream")) {
612  if (!st)
613  return AVERROR(ENOMEM);
615  } else if (!strcmp(key, "framerate")) {
616  flv->framerate = av_d2q(num_val, 1000);
617  if (vstream)
618  vstream->avg_frame_rate = flv->framerate;
619  } else if (flv->trust_metadata) {
620  if (!strcmp(key, "videocodecid") && vpar) {
621  int ret = flv_set_video_codec(s, vstream, num_val, 0);
622  if (ret < 0)
623  return ret;
624  } else if (!strcmp(key, "audiocodecid") && apar) {
625  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
626  flv_set_audio_codec(s, astream, apar, id);
627  } else if (!strcmp(key, "audiosamplerate") && apar) {
628  apar->sample_rate = num_val;
629  } else if (!strcmp(key, "audiosamplesize") && apar) {
630  apar->bits_per_coded_sample = num_val;
631  } else if (!strcmp(key, "stereo") && apar) {
632  av_channel_layout_default(&apar->ch_layout, num_val + 1);
633  } else if (!strcmp(key, "width") && vpar) {
634  vpar->width = num_val;
635  } else if (!strcmp(key, "height") && vpar) {
636  vpar->height = num_val;
637  }
638  }
639  }
640  if (amf_type == AMF_DATA_TYPE_STRING) {
641  if (!strcmp(key, "encoder")) {
642  int version = -1;
643  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
644  if (version > 0 && version <= 655)
645  flv->broken_sizes = 1;
646  }
647  } else if (!strcmp(key, "metadatacreator")) {
648  if ( !strcmp (str_val, "MEGA")
649  || !strncmp(str_val, "FlixEngine", 10))
650  flv->broken_sizes = 1;
651  }
652  }
653  }
654 
655  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
656  ((!apar && !strcmp(key, "audiocodecid")) ||
657  (!vpar && !strcmp(key, "videocodecid"))))
658  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
659 
660  if ((!strcmp(key, "duration") ||
661  !strcmp(key, "filesize") ||
662  !strcmp(key, "width") ||
663  !strcmp(key, "height") ||
664  !strcmp(key, "videodatarate") ||
665  !strcmp(key, "framerate") ||
666  !strcmp(key, "videocodecid") ||
667  !strcmp(key, "audiodatarate") ||
668  !strcmp(key, "audiosamplerate") ||
669  !strcmp(key, "audiosamplesize") ||
670  !strcmp(key, "stereo") ||
671  !strcmp(key, "audiocodecid") ||
672  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
673  return 0;
674 
675  s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
676  if (amf_type == AMF_DATA_TYPE_BOOL) {
677  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
678  sizeof(str_val));
679  av_dict_set(&s->metadata, key, str_val, 0);
680  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
681  snprintf(str_val, sizeof(str_val), "%.f", num_val);
682  av_dict_set(&s->metadata, key, str_val, 0);
683  } else if (amf_type == AMF_DATA_TYPE_STRING) {
684  av_dict_set(&s->metadata, key, str_val, 0);
685  } else if ( amf_type == AMF_DATA_TYPE_DATE
686  && isfinite(date.milliseconds)
687  && date.milliseconds > INT64_MIN/1000
688  && date.milliseconds < INT64_MAX/1000
689  ) {
690  // timezone is ignored, since there is no easy way to offset the UTC
691  // timestamp into the specified timezone
692  avpriv_dict_set_timestamp(&s->metadata, key, 1000 * (int64_t)date.milliseconds);
693  }
694  }
695 
696  return 0;
697 }
698 
699 #define TYPE_ONTEXTDATA 1
700 #define TYPE_ONCAPTION 2
701 #define TYPE_ONCAPTIONINFO 3
702 #define TYPE_UNKNOWN 9
703 
704 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
705 {
706  FLVContext *flv = s->priv_data;
708  AVStream *stream, *astream, *vstream;
709  AVStream av_unused *dstream;
710  AVIOContext *ioc;
711  int i;
712  char buffer[32];
713 
714  astream = NULL;
715  vstream = NULL;
716  dstream = NULL;
717  ioc = s->pb;
718 
719  // first object needs to be "onMetaData" string
720  type = avio_r8(ioc);
721  if (type != AMF_DATA_TYPE_STRING ||
722  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
723  return TYPE_UNKNOWN;
724 
725  if (!strcmp(buffer, "onTextData"))
726  return TYPE_ONTEXTDATA;
727 
728  if (!strcmp(buffer, "onCaption"))
729  return TYPE_ONCAPTION;
730 
731  if (!strcmp(buffer, "onCaptionInfo"))
732  return TYPE_ONCAPTIONINFO;
733 
734  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint") && strcmp(buffer, "|RtmpSampleAccess")) {
735  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
736  return TYPE_UNKNOWN;
737  }
738 
739  // find the streams now so that amf_parse_object doesn't need to do
740  // the lookup every time it is called.
741  for (i = 0; i < s->nb_streams; i++) {
742  stream = s->streams[i];
743  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
744  vstream = stream;
746  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
747  astream = stream;
748  if (flv->last_keyframe_stream_index == -1)
750  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
751  dstream = stream;
752  }
753 
754  // parse the second object (we want a mixed array)
755  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
756  return -1;
757 
758  return 0;
759 }
760 
762 {
763  int flags;
764  FLVContext *flv = s->priv_data;
765  int offset;
766  int pre_tag_size = 0;
767 
768  /* Actual FLV data at 0xe40000 in KUX file */
769  if(!strcmp(s->iformat->name, "kux"))
770  avio_skip(s->pb, 0xe40000);
771 
772  avio_skip(s->pb, 4);
773  flags = avio_r8(s->pb);
774 
776 
777  s->ctx_flags |= AVFMTCTX_NOHEADER;
778 
779  offset = avio_rb32(s->pb);
780  avio_seek(s->pb, offset, SEEK_SET);
781 
782  /* Annex E. The FLV File Format
783  * E.3 TheFLVFileBody
784  * Field Type Comment
785  * PreviousTagSize0 UI32 Always 0
786  * */
787  pre_tag_size = avio_rb32(s->pb);
788  if (pre_tag_size) {
789  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
790  }
791 
792  s->start_time = 0;
793  flv->sum_flv_tag_size = 0;
794  flv->last_keyframe_stream_index = -1;
795 
796  return 0;
797 }
798 
800 {
801  int i;
802  FLVContext *flv = s->priv_data;
803  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
804  av_freep(&flv->new_extradata[i]);
805  av_freep(&flv->keyframe_times);
807  return 0;
808 }
809 
811 {
812  int ret;
813  if (!size)
814  return 0;
815 
816  if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
817  return ret;
818  ffstream(st)->need_context_update = 1;
819  return 0;
820 }
821 
822 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
823  int size)
824 {
825  if (!size)
826  return 0;
827 
828  av_free(flv->new_extradata[stream]);
829  flv->new_extradata[stream] = av_mallocz(size +
831  if (!flv->new_extradata[stream])
832  return AVERROR(ENOMEM);
833  flv->new_extradata_size[stream] = size;
834  avio_read(pb, flv->new_extradata[stream], size);
835  return 0;
836 }
837 
838 static void clear_index_entries(AVFormatContext *s, int64_t pos)
839 {
841  "Found invalid index entries, clearing the index.\n");
842  for (unsigned i = 0; i < s->nb_streams; i++) {
843  FFStream *const sti = ffstream(s->streams[i]);
844  int out = 0;
845  /* Remove all index entries that point to >= pos */
846  for (int j = 0; j < sti->nb_index_entries; j++)
847  if (sti->index_entries[j].pos < pos)
848  sti->index_entries[out++] = sti->index_entries[j];
849  sti->nb_index_entries = out;
850  }
851 }
852 
853 static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
854 {
855  int nb = -1, ret, parse_name = 1;
856 
857  if (depth > MAX_DEPTH)
858  return AVERROR_PATCHWELCOME;
859 
860  if (avio_feof(pb))
861  return AVERROR_EOF;
862 
863  switch (type) {
865  avio_skip(pb, 8);
866  break;
867  case AMF_DATA_TYPE_BOOL:
868  avio_skip(pb, 1);
869  break;
871  avio_skip(pb, avio_rb16(pb));
872  break;
873  case AMF_DATA_TYPE_ARRAY:
874  parse_name = 0;
876  nb = avio_rb32(pb);
877  if (nb < 0)
878  return AVERROR_INVALIDDATA;
880  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
881  if (parse_name) {
882  int size = avio_rb16(pb);
883  if (!size) {
884  avio_skip(pb, 1);
885  break;
886  }
887  avio_skip(pb, size);
888  }
889  if ((ret = amf_skip_tag(pb, avio_r8(pb), depth + 1)) < 0)
890  return ret;
891  }
892  break;
893  case AMF_DATA_TYPE_NULL:
895  break;
896  default:
897  return AVERROR_INVALIDDATA;
898  }
899  return 0;
900 }
901 
903  int64_t dts, int64_t next)
904 {
905  AVIOContext *pb = s->pb;
906  AVStream *st = NULL;
907  char buf[20];
908  int ret = AVERROR_INVALIDDATA;
909  int i, length = -1;
910  int array = 0;
911 
912  switch (avio_r8(pb)) {
913  case AMF_DATA_TYPE_ARRAY:
914  array = 1;
916  avio_seek(pb, 4, SEEK_CUR);
918  break;
919  default:
920  goto skip;
921  }
922 
923  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
924  AMFDataType type = avio_r8(pb);
925  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
926  length = avio_rb16(pb);
927  ret = av_get_packet(pb, pkt, length);
928  if (ret < 0)
929  goto skip;
930  else
931  break;
932  } else {
933  if ((ret = amf_skip_tag(pb, type, 0)) < 0)
934  goto skip;
935  }
936  }
937 
938  if (length < 0) {
940  goto skip;
941  }
942 
943  for (i = 0; i < s->nb_streams; i++) {
944  st = s->streams[i];
946  break;
947  }
948 
949  if (i == s->nb_streams) {
951  if (!st)
952  return AVERROR(ENOMEM);
954  }
955 
956  pkt->dts = dts;
957  pkt->pts = dts;
958  pkt->size = ret;
959 
960  pkt->stream_index = st->index;
962 
963 skip:
964  avio_seek(s->pb, next + 4, SEEK_SET);
965 
966  return ret;
967 }
968 
970 {
971  FLVContext *flv = s->priv_data;
972  int64_t i;
973  int64_t pos = avio_tell(s->pb);
974 
975  for (i=0; !avio_feof(s->pb); i++) {
976  int j = i & (RESYNC_BUFFER_SIZE-1);
977  int j1 = j + RESYNC_BUFFER_SIZE;
978  flv->resync_buffer[j ] =
979  flv->resync_buffer[j1] = avio_r8(s->pb);
980 
981  if (i >= 8 && pos) {
982  uint8_t *d = flv->resync_buffer + j1 - 8;
983  if (d[0] == 'F' &&
984  d[1] == 'L' &&
985  d[2] == 'V' &&
986  d[3] < 5 && d[5] == 0) {
987  av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", flv->last_ts);
988  flv->time_offset = flv->last_ts + 1;
989  flv->time_pos = avio_tell(s->pb);
990  }
991  }
992 
993  if (i > 22) {
994  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
995  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
996  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
997  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
998  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
999  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
1000  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
1001  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
1002  return 1;
1003  }
1004  }
1005  }
1006  }
1007  }
1008  return AVERROR_EOF;
1009 }
1010 
1012 {
1013  FLVContext *flv = s->priv_data;
1014  int ret, i, size, flags;
1015  enum FlvTagType type;
1016  int stream_type=-1;
1017  int64_t next, pos, meta_pos;
1018  int64_t dts, pts = AV_NOPTS_VALUE;
1019  int av_uninit(channels);
1020  int av_uninit(sample_rate);
1021  AVStream *st = NULL;
1022  int last = -1;
1023  int orig_size;
1024 
1025 retry:
1026  /* pkt size is repeated at end. skip it */
1027  pos = avio_tell(s->pb);
1028  type = (avio_r8(s->pb) & 0x1F);
1029  orig_size =
1030  size = avio_rb24(s->pb);
1031  flv->sum_flv_tag_size += size + 11;
1032  dts = avio_rb24(s->pb);
1033  dts |= (unsigned)avio_r8(s->pb) << 24;
1034  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));
1035  if (avio_feof(s->pb))
1036  return AVERROR_EOF;
1037  avio_skip(s->pb, 3); /* stream id, always 0 */
1038  flags = 0;
1039 
1040  if (flv->validate_next < flv->validate_count) {
1041  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
1042  if (pos == validate_pos) {
1043  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
1045  flv->validate_next++;
1046  } else {
1047  clear_index_entries(s, validate_pos);
1048  flv->validate_count = 0;
1049  }
1050  } else if (pos > validate_pos) {
1051  clear_index_entries(s, validate_pos);
1052  flv->validate_count = 0;
1053  }
1054  }
1055 
1056  if (size == 0) {
1057  ret = FFERROR_REDO;
1058  goto leave;
1059  }
1060 
1061  next = size + avio_tell(s->pb);
1062 
1063  if (type == FLV_TAG_TYPE_AUDIO) {
1064  stream_type = FLV_STREAM_TYPE_AUDIO;
1065  flags = avio_r8(s->pb);
1066  size--;
1067  } else if (type == FLV_TAG_TYPE_VIDEO) {
1068  stream_type = FLV_STREAM_TYPE_VIDEO;
1069  flags = avio_r8(s->pb);
1070  size--;
1072  goto skip;
1073  } else if (type == FLV_TAG_TYPE_META) {
1074  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1075  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1076  int type;
1077  meta_pos = avio_tell(s->pb);
1078  type = flv_read_metabody(s, next);
1079  if (type == 0 && dts == 0 || type < 0) {
1080  if (type < 0 && flv->validate_count &&
1081  flv->validate_index[0].pos > next &&
1082  flv->validate_index[0].pos - 4 < next) {
1083  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1084  next = flv->validate_index[0].pos - 4;
1085  }
1086  goto skip;
1087  } else if (type == TYPE_ONTEXTDATA) {
1088  avpriv_request_sample(s, "OnTextData packet");
1089  return flv_data_packet(s, pkt, dts, next);
1090  } else if (type == TYPE_ONCAPTION) {
1091  return flv_data_packet(s, pkt, dts, next);
1092  } else if (type == TYPE_UNKNOWN) {
1093  stream_type = FLV_STREAM_TYPE_DATA;
1094  }
1095  avio_seek(s->pb, meta_pos, SEEK_SET);
1096  }
1097  } else {
1099  "Skipping flv packet: type %d, size %d, flags %d.\n",
1100  type, size, flags);
1101 skip:
1102  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1103  // This can happen if flv_read_metabody above read past
1104  // next, on a non-seekable input, and the preceding data has
1105  // been flushed out from the IO buffer.
1106  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1107  return AVERROR_INVALIDDATA;
1108  }
1109  ret = FFERROR_REDO;
1110  goto leave;
1111  }
1112 
1113  /* skip empty data packets */
1114  if (!size) {
1115  ret = FFERROR_REDO;
1116  goto leave;
1117  }
1118 
1119  /* now find stream */
1120  for (i = 0; i < s->nb_streams; i++) {
1121  st = s->streams[i];
1122  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1123  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1124  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1125  break;
1126  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1127  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1128  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1129  break;
1130  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1132  break;
1133  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1135  break;
1136  }
1137  }
1138  if (i == s->nb_streams) {
1140  st = create_stream(s, stream_types[stream_type]);
1141  if (!st)
1142  return AVERROR(ENOMEM);
1143  }
1144  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1145 
1146  if (flv->time_pos <= pos) {
1147  dts += flv->time_offset;
1148  }
1149 
1150  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1152  stream_type == FLV_STREAM_TYPE_AUDIO))
1154 
1155  if ((st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || stream_type == FLV_STREAM_TYPE_AUDIO)) ||
1157  st->discard >= AVDISCARD_ALL) {
1158  avio_seek(s->pb, next, SEEK_SET);
1159  ret = FFERROR_REDO;
1160  goto leave;
1161  }
1162 
1163  // if not streamed and no duration from metadata then seek to end to find
1164  // the duration from the timestamps
1165  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1166  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1167  !flv->searched_for_end) {
1168  int size;
1169  const int64_t pos = avio_tell(s->pb);
1170  // Read the last 4 bytes of the file, this should be the size of the
1171  // previous FLV tag. Use the timestamp of its payload as duration.
1172  int64_t fsize = avio_size(s->pb);
1173 retry_duration:
1174  avio_seek(s->pb, fsize - 4, SEEK_SET);
1175  size = avio_rb32(s->pb);
1176  if (size > 0 && size < fsize) {
1177  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1178  // but skip the byte indicating the type.
1179  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1180  if (size == avio_rb24(s->pb) + 11) {
1181  uint32_t ts = avio_rb24(s->pb);
1182  ts |= (unsigned)avio_r8(s->pb) << 24;
1183  if (ts)
1184  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1185  else if (fsize >= 8 && fsize - 8 >= size) {
1186  fsize -= size+4;
1187  goto retry_duration;
1188  }
1189  }
1190  }
1191 
1192  avio_seek(s->pb, pos, SEEK_SET);
1193  flv->searched_for_end = 1;
1194  }
1195 
1196  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1197  int bits_per_coded_sample;
1199  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1201  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1203  !st->codecpar->sample_rate ||
1207  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1208  }
1209  if (!st->codecpar->codec_id) {
1210  flv_set_audio_codec(s, st, st->codecpar,
1212  flv->last_sample_rate =
1214  flv->last_channels =
1216  } else {
1218  if (!par) {
1219  ret = AVERROR(ENOMEM);
1220  goto leave;
1221  }
1222  par->sample_rate = sample_rate;
1223  par->bits_per_coded_sample = bits_per_coded_sample;
1225  sample_rate = par->sample_rate;
1227  }
1228  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1230  if (ret < 0)
1231  return ret;
1232  size -= ret;
1233  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1235  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1236  st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1237  }
1238 
1239  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1242  int type = avio_r8(s->pb);
1243  size--;
1244 
1245  if (size < 0) {
1247  goto leave;
1248  }
1249 
1251  // sign extension
1252  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1253  pts = av_sat_add64(dts, cts);
1254  if (cts < 0) { // dts might be wrong
1255  if (!flv->wrong_dts)
1257  "Negative cts, previous timestamps might be wrong.\n");
1258  flv->wrong_dts = 1;
1259  } else if (FFABS(dts - pts) > 1000*60*15) {
1261  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1262  dts = pts = AV_NOPTS_VALUE;
1263  }
1264  }
1265  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1266  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1267  AVDictionaryEntry *t;
1268 
1269  if (st->codecpar->extradata) {
1270  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1271  return ret;
1272  ret = FFERROR_REDO;
1273  goto leave;
1274  }
1275  if ((ret = flv_get_extradata(s, st, size)) < 0)
1276  return ret;
1277 
1278  /* Workaround for buggy Omnia A/XE encoder */
1279  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1280  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1281  st->codecpar->extradata_size = 2;
1282 
1283  ret = FFERROR_REDO;
1284  goto leave;
1285  }
1286  }
1287 
1288  /* skip empty data packets */
1289  if (!size) {
1290  ret = FFERROR_REDO;
1291  goto leave;
1292  }
1293 
1294  ret = av_get_packet(s->pb, pkt, size);
1295  if (ret < 0)
1296  return ret;
1297  pkt->dts = dts;
1298  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1299  pkt->stream_index = st->index;
1300  pkt->pos = pos;
1301  if (flv->new_extradata[stream_type]) {
1303  flv->new_extradata[stream_type],
1304  flv->new_extradata_size[stream_type]);
1305  if (ret >= 0) {
1306  flv->new_extradata[stream_type] = NULL;
1307  flv->new_extradata_size[stream_type] = 0;
1308  }
1309  }
1310  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1311  (sample_rate != flv->last_sample_rate ||
1312  channels != flv->last_channels)) {
1314  flv->last_channels = channels;
1316  }
1317 
1318  if (stream_type == FLV_STREAM_TYPE_AUDIO ||
1320  stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1321  stream_type == FLV_STREAM_TYPE_DATA)
1323 
1324 leave:
1325  last = avio_rb32(s->pb);
1326  if (!flv->trust_datasize) {
1327  if (last != orig_size + 11 && last != orig_size + 10 &&
1328  !avio_feof(s->pb) &&
1329  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1330  !flv->broken_sizes) {
1331  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1332  avio_seek(s->pb, pos + 1, SEEK_SET);
1333  ret = resync(s);
1335  if (ret >= 0) {
1336  goto retry;
1337  }
1338  }
1339  }
1340 
1341  if (ret >= 0)
1342  flv->last_ts = pkt->dts;
1343 
1344  return ret;
1345 }
1346 
1347 static int flv_read_seek(AVFormatContext *s, int stream_index,
1348  int64_t ts, int flags)
1349 {
1350  FLVContext *flv = s->priv_data;
1351  flv->validate_count = 0;
1352  return avio_seek_time(s->pb, stream_index, ts, flags);
1353 }
1354 
1355 #define OFFSET(x) offsetof(FLVContext, x)
1356 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1357 static const AVOption options[] = {
1358  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1359  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1360  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1361  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1362  { NULL }
1363 };
1364 
1365 static const AVClass flv_kux_class = {
1366  .class_name = "(live) flv/kux demuxer",
1367  .item_name = av_default_item_name,
1368  .option = options,
1369  .version = LIBAVUTIL_VERSION_INT,
1370 };
1371 
1373  .name = "flv",
1374  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1375  .priv_data_size = sizeof(FLVContext),
1376  .read_probe = flv_probe,
1381  .extensions = "flv",
1382  .priv_class = &flv_kux_class,
1383 };
1384 
1386  .name = "live_flv",
1387  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1388  .priv_data_size = sizeof(FLVContext),
1394  .extensions = "flv",
1395  .priv_class = &flv_kux_class,
1397 };
1398 
1400  .name = "kux",
1401  .long_name = NULL_IF_CONFIG_SMALL("KUX (YouKu)"),
1402  .priv_data_size = sizeof(FLVContext),
1403  .read_probe = kux_probe,
1408  .extensions = "kux",
1409  .priv_class = &flv_kux_class,
1410 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:316
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_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:838
FLVContext::validate_next
int validate_next
Definition: flvdec.c:61
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
FLV_HEADER_FLAG_HASAUDIO
@ FLV_HEADER_FLAG_HASAUDIO
Definition: flv.h:56
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:701
flv_data_packet
static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, int64_t dts, int64_t next)
Definition: flvdec.c:902
FLV_CODECID_H264
@ FLV_CODECID_H264
Definition: flv.h:110
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
FLVContext::trust_metadata
int trust_metadata
configure streams according onMetaData
Definition: flvdec.c:49
flv_read_packet
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvdec.c:1011
FLV_CODECID_SCREEN
@ FLV_CODECID_SCREEN
Definition: flv.h:106
TYPE_ONCAPTION
#define TYPE_ONCAPTION
Definition: flvdec.c:700
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
FLV_CODECID_SCREEN2
@ FLV_CODECID_SCREEN2
Definition: flv.h:109
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
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
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:153
options
static const AVOption options[]
Definition: flvdec.c:1357
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
FLV_CODECID_SPEEX
@ FLV_CODECID_SPEEX
Definition: flv.h:101
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:697
finish
static void finish(void)
Definition: movenc.c:342
OFFSET
#define OFFSET(x)
Definition: flvdec.c:1355
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
FLV_CODECID_PCM_ALAW
@ FLV_CODECID_PCM_ALAW
Definition: flv.h:98
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:460
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:317
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:1324
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
TYPE_ONTEXTDATA
#define TYPE_ONTEXTDATA
Definition: flvdec.c:699
flv_read_seek
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1347
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:1385
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:426
FLV_AUDIO_CODECID_OFFSET
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
FLV_CODECID_AAC
@ FLV_CODECID_AAC
Definition: flv.h:100
VD
#define VD
Definition: flvdec.c:1356
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
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
FLV_CODECID_MP3
@ FLV_CODECID_MP3
Definition: flv.h:93
ff_kux_demuxer
const AVInputFormat ff_kux_demuxer
Definition: flvdec.c:1399
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
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:853
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
FLV_STREAM_TYPE_SUBTITLE
@ FLV_STREAM_TYPE_SUBTITLE
Definition: flv.h:68
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:322
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:371
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:702
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:323
flv_read_close
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:799
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:529
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
ff_flv_demuxer
const AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1372
FLV_CODECID_MPEG4
@ FLV_CODECID_MPEG4
Definition: flv.h:112
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:761
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
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_CODECID_PCM
@ FLV_CODECID_PCM
Definition: flv.h:91
FLV_CODECID_NELLYMOSER_8KHZ_MONO
@ FLV_CODECID_NELLYMOSER_8KHZ_MONO
Definition: flv.h:96
flv.h
FLVContext::last_channels
int last_channels
Definition: flvdec.c:56
AMF_DATA_TYPE_ARRAY
@ AMF_DATA_TYPE_ARRAY
Definition: flv.h:133
AV_CODEC_ID_FLASHSV
@ AV_CODEC_ID_FLASHSV
Definition: codec_id.h:136
FLVContext::keyframe_count
int keyframe_count
Definition: flvdec.c:71
FLV_CODECID_NELLYMOSER
@ FLV_CODECID_NELLYMOSER
Definition: flv.h:97
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_H263
@ FLV_CODECID_H263
Definition: flv.h:105
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::validate_index
struct FLVContext::@260 validate_index[2]
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
FLV_STREAM_TYPE_AUDIO
@ FLV_STREAM_TYPE_AUDIO
Definition: flv.h:67
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:427
FLV_HEADER_FLAG_HASVIDEO
@ FLV_HEADER_FLAG_HASVIDEO
Definition: flv.h:55
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
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:116
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
FLV_STREAM_TYPE_DATA
@ FLV_STREAM_TYPE_DATA
Definition: flv.h:69
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:368
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
FLV_FRAME_VIDEO_INFO_CMD
@ FLV_FRAME_VIDEO_INFO_CMD
video info/command frame
Definition: flv.h:120
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
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
FLV_FRAME_KEY
@ FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
Definition: flv.h:116
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h: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:704
FLV_STREAM_TYPE_NB
@ FLV_STREAM_TYPE_NB
Definition: flv.h:70
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:969
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_CODECID_VP6A
@ FLV_CODECID_VP6A
Definition: flv.h:108
flv_queue_extradata
static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, int size)
Definition: flvdec.c:822
FLV_CODECID_NELLYMOSER_16KHZ_MONO
@ FLV_CODECID_NELLYMOSER_16KHZ_MONO
Definition: flv.h:95
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
FLV_CODECID_PCM_MULAW
@ FLV_CODECID_PCM_MULAW
Definition: flv.h:99
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:1365
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
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:527
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
FLV_CODECID_REALH263
@ FLV_CODECID_REALH263
Definition: flv.h:111
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:499
FLV_CODECID_ADPCM
@ FLV_CODECID_ADPCM
Definition: flv.h:92
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
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:252
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
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:321
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:810
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
FLV_STEREO
@ FLV_STEREO
Definition: flv.h:75
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
FLV_CODECID_VP6
@ FLV_CODECID_VP6
Definition: flv.h:107
d
d
Definition: ffmpeg_filter.c:153
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_FRAME_DISP_INTER
@ FLV_FRAME_DISP_INTER
disposable inter frame (H.263 only)
Definition: flv.h:118
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
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:153
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
FLV_CODECID_PCM_LE
@ FLV_CODECID_PCM_LE
Definition: flv.h:94
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:458
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