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/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/intfloat.h"
33 #include "libavutil/mathematics.h"
35 #include "libavcodec/bytestream.h"
36 #include "avformat.h"
37 #include "internal.h"
38 #include "avio_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  current_array[0][i] = d;
465  }
466  if (times && filepositions) {
467  // All done, exiting at a position allowing amf_parse_object
468  // to finish parsing the object
469  ret = 0;
470  break;
471  }
472  }
473 
474  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
475  for (i = 0; i < FFMIN(2,fileposlen); i++) {
476  flv->validate_index[i].pos = filepositions[i];
477  flv->validate_index[i].dts = times[i] * 1000;
478  flv->validate_count = i + 1;
479  }
480  flv->keyframe_times = times;
481  flv->keyframe_filepositions = filepositions;
482  flv->keyframe_count = timeslen;
483  times = NULL;
484  filepositions = NULL;
485  } else {
486 invalid:
487  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
488  }
489 
490 finish:
491  av_freep(&times);
492  av_freep(&filepositions);
493  avio_seek(ioc, initial_pos, SEEK_SET);
494  return ret;
495 }
496 
498  AVStream *vstream, const char *key,
499  int64_t max_pos, int depth)
500 {
501  AVCodecParameters *apar, *vpar;
502  FLVContext *flv = s->priv_data;
503  AVIOContext *ioc;
504  AMFDataType amf_type;
505  char str_val[1024];
506  double num_val;
507  amf_date date;
508 
509  if (depth > MAX_DEPTH)
510  return AVERROR_PATCHWELCOME;
511 
512  num_val = 0;
513  ioc = s->pb;
514  if (avio_feof(ioc))
515  return AVERROR_EOF;
516  amf_type = avio_r8(ioc);
517 
518  switch (amf_type) {
520  num_val = av_int2double(avio_rb64(ioc));
521  break;
522  case AMF_DATA_TYPE_BOOL:
523  num_val = avio_r8(ioc);
524  break;
526  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
527  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
528  return -1;
529  }
530  break;
532  if (key &&
533  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
534  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
535  if (parse_keyframes_index(s, ioc, max_pos) < 0)
536  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
537  else
539  while (avio_tell(ioc) < max_pos - 2 &&
540  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
541  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
542  depth + 1) < 0)
543  return -1; // if we couldn't skip, bomb out.
544  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
545  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
546  return -1;
547  }
548  break;
549  case AMF_DATA_TYPE_NULL:
552  break; // these take up no additional space
554  {
555  unsigned v;
556  avio_skip(ioc, 4); // skip 32-bit max array index
557  while (avio_tell(ioc) < max_pos - 2 &&
558  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
559  // this is the only case in which we would want a nested
560  // parse to not skip over the object
561  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
562  depth + 1) < 0)
563  return -1;
564  v = avio_r8(ioc);
565  if (v != AMF_END_OF_OBJECT) {
566  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
567  return -1;
568  }
569  break;
570  }
571  case AMF_DATA_TYPE_ARRAY:
572  {
573  unsigned int arraylen, i;
574 
575  arraylen = avio_rb32(ioc);
576  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
578  depth + 1) < 0)
579  return -1; // if we couldn't skip, bomb out.
580  }
581  break;
582  case AMF_DATA_TYPE_DATE:
583  // timestamp (double) and UTC offset (int16)
584  date.milliseconds = av_int2double(avio_rb64(ioc));
585  date.timezone = avio_rb16(ioc);
586  break;
587  default: // unsupported type, we couldn't skip
588  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
589  return -1;
590  }
591 
592  if (key) {
593  apar = astream ? astream->codecpar : NULL;
594  vpar = vstream ? vstream->codecpar : NULL;
595 
596  // stream info doesn't live any deeper than the first object
597  if (depth == 1) {
598  if (amf_type == AMF_DATA_TYPE_NUMBER ||
599  amf_type == AMF_DATA_TYPE_BOOL) {
600  if (!strcmp(key, "duration"))
601  s->duration = num_val * AV_TIME_BASE;
602  else if (!strcmp(key, "videodatarate") &&
603  0 <= (int)(num_val * 1024.0))
604  flv->video_bit_rate = num_val * 1024.0;
605  else if (!strcmp(key, "audiodatarate") &&
606  0 <= (int)(num_val * 1024.0))
607  flv->audio_bit_rate = num_val * 1024.0;
608  else if (!strcmp(key, "datastream")) {
610  if (!st)
611  return AVERROR(ENOMEM);
613  } else if (!strcmp(key, "framerate")) {
614  flv->framerate = av_d2q(num_val, 1000);
615  if (vstream)
616  vstream->avg_frame_rate = flv->framerate;
617  } else if (flv->trust_metadata) {
618  if (!strcmp(key, "videocodecid") && vpar) {
619  int ret = flv_set_video_codec(s, vstream, num_val, 0);
620  if (ret < 0)
621  return ret;
622  } else if (!strcmp(key, "audiocodecid") && apar) {
623  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
624  flv_set_audio_codec(s, astream, apar, id);
625  } else if (!strcmp(key, "audiosamplerate") && apar) {
626  apar->sample_rate = num_val;
627  } else if (!strcmp(key, "audiosamplesize") && apar) {
628  apar->bits_per_coded_sample = num_val;
629  } else if (!strcmp(key, "stereo") && apar) {
630  apar->channels = num_val + 1;
631  apar->channel_layout = apar->channels == 2 ?
634  } else if (!strcmp(key, "width") && vpar) {
635  vpar->width = num_val;
636  } else if (!strcmp(key, "height") && vpar) {
637  vpar->height = num_val;
638  }
639  }
640  }
641  if (amf_type == AMF_DATA_TYPE_STRING) {
642  if (!strcmp(key, "encoder")) {
643  int version = -1;
644  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
645  if (version > 0 && version <= 655)
646  flv->broken_sizes = 1;
647  }
648  } else if (!strcmp(key, "metadatacreator")) {
649  if ( !strcmp (str_val, "MEGA")
650  || !strncmp(str_val, "FlixEngine", 10))
651  flv->broken_sizes = 1;
652  }
653  }
654  }
655 
656  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
657  ((!apar && !strcmp(key, "audiocodecid")) ||
658  (!vpar && !strcmp(key, "videocodecid"))))
659  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
660 
661  if ((!strcmp(key, "duration") ||
662  !strcmp(key, "filesize") ||
663  !strcmp(key, "width") ||
664  !strcmp(key, "height") ||
665  !strcmp(key, "videodatarate") ||
666  !strcmp(key, "framerate") ||
667  !strcmp(key, "videocodecid") ||
668  !strcmp(key, "audiodatarate") ||
669  !strcmp(key, "audiosamplerate") ||
670  !strcmp(key, "audiosamplesize") ||
671  !strcmp(key, "stereo") ||
672  !strcmp(key, "audiocodecid") ||
673  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
674  return 0;
675 
676  s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
677  if (amf_type == AMF_DATA_TYPE_BOOL) {
678  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
679  sizeof(str_val));
680  av_dict_set(&s->metadata, key, str_val, 0);
681  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
682  snprintf(str_val, sizeof(str_val), "%.f", num_val);
683  av_dict_set(&s->metadata, key, str_val, 0);
684  } else if (amf_type == AMF_DATA_TYPE_STRING) {
685  av_dict_set(&s->metadata, key, str_val, 0);
686  } else if ( amf_type == AMF_DATA_TYPE_DATE
687  && isfinite(date.milliseconds)
688  && date.milliseconds > INT64_MIN/1000
689  && date.milliseconds < INT64_MAX/1000
690  ) {
691  // timezone is ignored, since there is no easy way to offset the UTC
692  // timestamp into the specified timezone
693  avpriv_dict_set_timestamp(&s->metadata, key, 1000 * (int64_t)date.milliseconds);
694  }
695  }
696 
697  return 0;
698 }
699 
700 #define TYPE_ONTEXTDATA 1
701 #define TYPE_ONCAPTION 2
702 #define TYPE_ONCAPTIONINFO 3
703 #define TYPE_UNKNOWN 9
704 
705 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
706 {
707  FLVContext *flv = s->priv_data;
709  AVStream *stream, *astream, *vstream;
710  AVStream av_unused *dstream;
711  AVIOContext *ioc;
712  int i;
713  char buffer[32];
714 
715  astream = NULL;
716  vstream = NULL;
717  dstream = NULL;
718  ioc = s->pb;
719 
720  // first object needs to be "onMetaData" string
721  type = avio_r8(ioc);
722  if (type != AMF_DATA_TYPE_STRING ||
723  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
724  return TYPE_UNKNOWN;
725 
726  if (!strcmp(buffer, "onTextData"))
727  return TYPE_ONTEXTDATA;
728 
729  if (!strcmp(buffer, "onCaption"))
730  return TYPE_ONCAPTION;
731 
732  if (!strcmp(buffer, "onCaptionInfo"))
733  return TYPE_ONCAPTIONINFO;
734 
735  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint") && strcmp(buffer, "|RtmpSampleAccess")) {
736  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
737  return TYPE_UNKNOWN;
738  }
739 
740  // find the streams now so that amf_parse_object doesn't need to do
741  // the lookup every time it is called.
742  for (i = 0; i < s->nb_streams; i++) {
743  stream = s->streams[i];
744  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
745  vstream = stream;
747  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
748  astream = stream;
749  if (flv->last_keyframe_stream_index == -1)
751  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
752  dstream = stream;
753  }
754 
755  // parse the second object (we want a mixed array)
756  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
757  return -1;
758 
759  return 0;
760 }
761 
763 {
764  int flags;
765  FLVContext *flv = s->priv_data;
766  int offset;
767  int pre_tag_size = 0;
768 
769  /* Actual FLV data at 0xe40000 in KUX file */
770  if(!strcmp(s->iformat->name, "kux"))
771  avio_skip(s->pb, 0xe40000);
772 
773  avio_skip(s->pb, 4);
774  flags = avio_r8(s->pb);
775 
777 
778  s->ctx_flags |= AVFMTCTX_NOHEADER;
779 
780  offset = avio_rb32(s->pb);
781  avio_seek(s->pb, offset, SEEK_SET);
782 
783  /* Annex E. The FLV File Format
784  * E.3 TheFLVFileBody
785  * Field Type Comment
786  * PreviousTagSize0 UI32 Always 0
787  * */
788  pre_tag_size = avio_rb32(s->pb);
789  if (pre_tag_size) {
790  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
791  }
792 
793  s->start_time = 0;
794  flv->sum_flv_tag_size = 0;
795  flv->last_keyframe_stream_index = -1;
796 
797  return 0;
798 }
799 
801 {
802  int i;
803  FLVContext *flv = s->priv_data;
804  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
805  av_freep(&flv->new_extradata[i]);
806  av_freep(&flv->keyframe_times);
808  return 0;
809 }
810 
812 {
813  int ret;
814  if (!size)
815  return 0;
816 
817  if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
818  return ret;
819  ffstream(st)->need_context_update = 1;
820  return 0;
821 }
822 
823 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
824  int size)
825 {
826  if (!size)
827  return 0;
828 
829  av_free(flv->new_extradata[stream]);
830  flv->new_extradata[stream] = av_mallocz(size +
832  if (!flv->new_extradata[stream])
833  return AVERROR(ENOMEM);
834  flv->new_extradata_size[stream] = size;
835  avio_read(pb, flv->new_extradata[stream], size);
836  return 0;
837 }
838 
839 static void clear_index_entries(AVFormatContext *s, int64_t pos)
840 {
842  "Found invalid index entries, clearing the index.\n");
843  for (unsigned i = 0; i < s->nb_streams; i++) {
844  FFStream *const sti = ffstream(s->streams[i]);
845  int out = 0;
846  /* Remove all index entries that point to >= pos */
847  for (int j = 0; j < sti->nb_index_entries; j++)
848  if (sti->index_entries[j].pos < pos)
849  sti->index_entries[out++] = sti->index_entries[j];
850  sti->nb_index_entries = out;
851  }
852 }
853 
854 static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
855 {
856  int nb = -1, ret, parse_name = 1;
857 
858  if (depth > MAX_DEPTH)
859  return AVERROR_PATCHWELCOME;
860 
861  if (avio_feof(pb))
862  return AVERROR_EOF;
863 
864  switch (type) {
866  avio_skip(pb, 8);
867  break;
868  case AMF_DATA_TYPE_BOOL:
869  avio_skip(pb, 1);
870  break;
872  avio_skip(pb, avio_rb16(pb));
873  break;
874  case AMF_DATA_TYPE_ARRAY:
875  parse_name = 0;
877  nb = avio_rb32(pb);
878  if (nb < 0)
879  return AVERROR_INVALIDDATA;
881  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
882  if (parse_name) {
883  int size = avio_rb16(pb);
884  if (!size) {
885  avio_skip(pb, 1);
886  break;
887  }
888  avio_skip(pb, size);
889  }
890  if ((ret = amf_skip_tag(pb, avio_r8(pb), depth + 1)) < 0)
891  return ret;
892  }
893  break;
894  case AMF_DATA_TYPE_NULL:
896  break;
897  default:
898  return AVERROR_INVALIDDATA;
899  }
900  return 0;
901 }
902 
904  int64_t dts, int64_t next)
905 {
906  AVIOContext *pb = s->pb;
907  AVStream *st = NULL;
908  char buf[20];
909  int ret = AVERROR_INVALIDDATA;
910  int i, length = -1;
911  int array = 0;
912 
913  switch (avio_r8(pb)) {
914  case AMF_DATA_TYPE_ARRAY:
915  array = 1;
917  avio_seek(pb, 4, SEEK_CUR);
919  break;
920  default:
921  goto skip;
922  }
923 
924  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
925  AMFDataType type = avio_r8(pb);
926  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
927  length = avio_rb16(pb);
928  ret = av_get_packet(pb, pkt, length);
929  if (ret < 0)
930  goto skip;
931  else
932  break;
933  } else {
934  if ((ret = amf_skip_tag(pb, type, 0)) < 0)
935  goto skip;
936  }
937  }
938 
939  if (length < 0) {
941  goto skip;
942  }
943 
944  for (i = 0; i < s->nb_streams; i++) {
945  st = s->streams[i];
947  break;
948  }
949 
950  if (i == s->nb_streams) {
952  if (!st)
953  return AVERROR(ENOMEM);
955  }
956 
957  pkt->dts = dts;
958  pkt->pts = dts;
959  pkt->size = ret;
960 
961  pkt->stream_index = st->index;
963 
964 skip:
965  avio_seek(s->pb, next + 4, SEEK_SET);
966 
967  return ret;
968 }
969 
971 {
972  FLVContext *flv = s->priv_data;
973  int64_t i;
974  int64_t pos = avio_tell(s->pb);
975 
976  for (i=0; !avio_feof(s->pb); i++) {
977  int j = i & (RESYNC_BUFFER_SIZE-1);
978  int j1 = j + RESYNC_BUFFER_SIZE;
979  flv->resync_buffer[j ] =
980  flv->resync_buffer[j1] = avio_r8(s->pb);
981 
982  if (i >= 8 && pos) {
983  uint8_t *d = flv->resync_buffer + j1 - 8;
984  if (d[0] == 'F' &&
985  d[1] == 'L' &&
986  d[2] == 'V' &&
987  d[3] < 5 && d[5] == 0) {
988  av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", flv->last_ts);
989  flv->time_offset = flv->last_ts + 1;
990  flv->time_pos = avio_tell(s->pb);
991  }
992  }
993 
994  if (i > 22) {
995  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
996  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
997  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
998  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
999  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
1000  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
1001  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
1002  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
1003  return 1;
1004  }
1005  }
1006  }
1007  }
1008  }
1009  return AVERROR_EOF;
1010 }
1011 
1013 {
1014  FLVContext *flv = s->priv_data;
1015  int ret, i, size, flags;
1016  enum FlvTagType type;
1017  int stream_type=-1;
1018  int64_t next, pos, meta_pos;
1019  int64_t dts, pts = AV_NOPTS_VALUE;
1020  int av_uninit(channels);
1021  int av_uninit(sample_rate);
1022  AVStream *st = NULL;
1023  int last = -1;
1024  int orig_size;
1025 
1026 retry:
1027  /* pkt size is repeated at end. skip it */
1028  pos = avio_tell(s->pb);
1029  type = (avio_r8(s->pb) & 0x1F);
1030  orig_size =
1031  size = avio_rb24(s->pb);
1032  flv->sum_flv_tag_size += size + 11;
1033  dts = avio_rb24(s->pb);
1034  dts |= (unsigned)avio_r8(s->pb) << 24;
1035  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));
1036  if (avio_feof(s->pb))
1037  return AVERROR_EOF;
1038  avio_skip(s->pb, 3); /* stream id, always 0 */
1039  flags = 0;
1040 
1041  if (flv->validate_next < flv->validate_count) {
1042  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
1043  if (pos == validate_pos) {
1044  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
1046  flv->validate_next++;
1047  } else {
1048  clear_index_entries(s, validate_pos);
1049  flv->validate_count = 0;
1050  }
1051  } else if (pos > validate_pos) {
1052  clear_index_entries(s, validate_pos);
1053  flv->validate_count = 0;
1054  }
1055  }
1056 
1057  if (size == 0) {
1058  ret = FFERROR_REDO;
1059  goto leave;
1060  }
1061 
1062  next = size + avio_tell(s->pb);
1063 
1064  if (type == FLV_TAG_TYPE_AUDIO) {
1065  stream_type = FLV_STREAM_TYPE_AUDIO;
1066  flags = avio_r8(s->pb);
1067  size--;
1068  } else if (type == FLV_TAG_TYPE_VIDEO) {
1069  stream_type = FLV_STREAM_TYPE_VIDEO;
1070  flags = avio_r8(s->pb);
1071  size--;
1073  goto skip;
1074  } else if (type == FLV_TAG_TYPE_META) {
1075  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1076  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1077  int type;
1078  meta_pos = avio_tell(s->pb);
1079  type = flv_read_metabody(s, next);
1080  if (type == 0 && dts == 0 || type < 0) {
1081  if (type < 0 && flv->validate_count &&
1082  flv->validate_index[0].pos > next &&
1083  flv->validate_index[0].pos - 4 < next) {
1084  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1085  next = flv->validate_index[0].pos - 4;
1086  }
1087  goto skip;
1088  } else if (type == TYPE_ONTEXTDATA) {
1089  avpriv_request_sample(s, "OnTextData packet");
1090  return flv_data_packet(s, pkt, dts, next);
1091  } else if (type == TYPE_ONCAPTION) {
1092  return flv_data_packet(s, pkt, dts, next);
1093  } else if (type == TYPE_UNKNOWN) {
1094  stream_type = FLV_STREAM_TYPE_DATA;
1095  }
1096  avio_seek(s->pb, meta_pos, SEEK_SET);
1097  }
1098  } else {
1100  "Skipping flv packet: type %d, size %d, flags %d.\n",
1101  type, size, flags);
1102 skip:
1103  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1104  // This can happen if flv_read_metabody above read past
1105  // next, on a non-seekable input, and the preceding data has
1106  // been flushed out from the IO buffer.
1107  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1108  return AVERROR_INVALIDDATA;
1109  }
1110  ret = FFERROR_REDO;
1111  goto leave;
1112  }
1113 
1114  /* skip empty data packets */
1115  if (!size) {
1116  ret = FFERROR_REDO;
1117  goto leave;
1118  }
1119 
1120  /* now find stream */
1121  for (i = 0; i < s->nb_streams; i++) {
1122  st = s->streams[i];
1123  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1124  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1125  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1126  break;
1127  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1128  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1129  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1130  break;
1131  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1133  break;
1134  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1136  break;
1137  }
1138  }
1139  if (i == s->nb_streams) {
1141  st = create_stream(s, stream_types[stream_type]);
1142  if (!st)
1143  return AVERROR(ENOMEM);
1144  }
1145  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1146 
1147  if (flv->time_pos <= pos) {
1148  dts += flv->time_offset;
1149  }
1150 
1151  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1153  stream_type == FLV_STREAM_TYPE_AUDIO))
1155 
1156  if ((st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || stream_type == FLV_STREAM_TYPE_AUDIO)) ||
1158  st->discard >= AVDISCARD_ALL) {
1159  avio_seek(s->pb, next, SEEK_SET);
1160  ret = FFERROR_REDO;
1161  goto leave;
1162  }
1163 
1164  // if not streamed and no duration from metadata then seek to end to find
1165  // the duration from the timestamps
1166  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1167  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1168  !flv->searched_for_end) {
1169  int size;
1170  const int64_t pos = avio_tell(s->pb);
1171  // Read the last 4 bytes of the file, this should be the size of the
1172  // previous FLV tag. Use the timestamp of its payload as duration.
1173  int64_t fsize = avio_size(s->pb);
1174 retry_duration:
1175  avio_seek(s->pb, fsize - 4, SEEK_SET);
1176  size = avio_rb32(s->pb);
1177  if (size > 0 && size < fsize) {
1178  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1179  // but skip the byte indicating the type.
1180  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1181  if (size == avio_rb24(s->pb) + 11) {
1182  uint32_t ts = avio_rb24(s->pb);
1183  ts |= (unsigned)avio_r8(s->pb) << 24;
1184  if (ts)
1185  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1186  else if (fsize >= 8 && fsize - 8 >= size) {
1187  fsize -= size+4;
1188  goto retry_duration;
1189  }
1190  }
1191  }
1192 
1193  avio_seek(s->pb, pos, SEEK_SET);
1194  flv->searched_for_end = 1;
1195  }
1196 
1197  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1198  int bits_per_coded_sample;
1200  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1202  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1203  if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1205  st->codecpar->channels = channels;
1206  st->codecpar->channel_layout = channels == 1
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 =
1218  channels = st->codecpar->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:313
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:417
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:74
flv_same_video_codec
static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
Definition: flvdec.c:304
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: utils.c:724
AV_OPT_FLAG_READONLY
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:290
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
ff_get_extradata
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:469
clear_index_entries
static void clear_index_entries(AVFormatContext *s, int64_t pos)
Definition: flvdec.c:839
FLVContext::validate_next
int validate_next
Definition: flvdec.c:61
FFERROR_REDO
#define FFERROR_REDO
Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data).
Definition: internal.h:886
out
FILE * out
Definition: movenc.c:54
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
AVFMT_FLAG_IGNIDX
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1217
AMF_END_OF_OBJECT
#define AMF_END_OF_OBJECT
Definition: flv.h:47
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:894
av_int2double
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
AMF_DATA_TYPE_UNSUPPORTED
@ AMF_DATA_TYPE_UNSUPPORTED
Definition: flv.h:136
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
TYPE_ONCAPTIONINFO
#define TYPE_ONCAPTIONINFO
Definition: flvdec.c:702
flv_data_packet
static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, int64_t dts, int64_t next)
Definition: flvdec.c:903
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:1012
TYPE_ONCAPTION
#define TYPE_ONCAPTION
Definition: flvdec.c:701
AVOption
AVOption.
Definition: opt.h:247
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:912
FLV_CODECID_NELLYMOSER_16KHZ_MONO
@ FLV_CODECID_NELLYMOSER_16KHZ_MONO
Definition: flv.h:95
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:61
FLV_FRAME_KEY
@ FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
Definition: flv.h:116
FLV_STREAM_TYPE_NB
@ FLV_STREAM_TYPE_NB
Definition: flv.h:70
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:64
mathematics.h
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
FLVContext::trust_datasize
int trust_datasize
trust data size of FLVTag
Definition: flvdec.c:50
intfloat.h
codec_type
enum AVMediaType codec_type
Definition: rtp.c:37
FLV_CODECID_SCREEN
@ FLV_CODECID_SCREEN
Definition: flv.h:106
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:338
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:425
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
options
static const AVOption options[]
Definition: flvdec.c:1360
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:785
FLV_AUDIO_SAMPLERATE_OFFSET
#define FLV_AUDIO_SAMPLERATE_OFFSET
Definition: flv.h:33
FLV_STREAM_TYPE_VIDEO
@ FLV_STREAM_TYPE_VIDEO
Definition: flv.h:66
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
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
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
FLVContext::keyframe_filepositions
int64_t * keyframe_filepositions
Definition: flvdec.c:75
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:191
FLV_HEADER_FLAG_HASVIDEO
@ FLV_HEADER_FLAG_HASVIDEO
Definition: flv.h:55
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: codec_id.h:457
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:426
FLVContext::last_ts
int64_t last_ts
Definition: flvdec.c:78
AMF_DATA_TYPE_STRING
@ AMF_DATA_TYPE_STRING
Definition: flv.h:126
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:314
FLV_STREAM_TYPE_SUBTITLE
@ FLV_STREAM_TYPE_SUBTITLE
Definition: flv.h:68
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:1252
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
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:117
TYPE_ONTEXTDATA
#define TYPE_ONTEXTDATA
Definition: flvdec.c:700
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:141
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:486
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:653
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:423
FLV_CODECID_VP6
@ FLV_CODECID_VP6
Definition: flv.h:107
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
FLV_TAG_TYPE_META
@ FLV_TAG_TYPE_META
Definition: flv.h:62
FLV_AUDIO_CODECID_MASK
#define FLV_AUDIO_CODECID_MASK
Definition: flv.h:42
VD
#define VD
Definition: flvdec.c:1359
AMF_DATA_TYPE_BOOL
@ AMF_DATA_TYPE_BOOL
Definition: flv.h:125
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:773
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:626
VALIDATE_INDEX_TS_THRESH
#define VALIDATE_INDEX_TS_THRESH
Definition: flvdec.c:41
FLV_STREAM_TYPE_AUDIO
@ FLV_STREAM_TYPE_AUDIO
Definition: flv.h:67
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
s
#define s(width, name)
Definition: cbs_vp9.c:257
FLV_CODECID_ADPCM
@ FLV_CODECID_ADPCM
Definition: flv.h:92
FLV_CODECID_MP3
@ FLV_CODECID_MP3
Definition: flv.h:93
ff_kux_demuxer
const AVInputFormat ff_kux_demuxer
Definition: flvdec.c:1402
FLV_FRAME_VIDEO_INFO_CMD
@ FLV_FRAME_VIDEO_INFO_CMD
video info/command frame
Definition: flv.h:120
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:631
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
create_stream
static AVStream * create_stream(AVFormatContext *s, int codec_type)
Definition: flvdec.c:163
FLVContext::dts
int64_t dts
Definition: flvdec.c:58
FLV_VIDEO_FRAMETYPE_MASK
#define FLV_VIDEO_FRAMETYPE_MASK
Definition: flv.h:45
amf_skip_tag
static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
Definition: flvdec.c:854
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
FLV_CODECID_AAC
@ FLV_CODECID_AAC
Definition: flv.h:100
FLV_CODECID_REALH263
@ FLV_CODECID_REALH263
Definition: flv.h:111
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
channels
channels
Definition: aptx.h:33
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:319
FLV_CODECID_H264
@ FLV_CODECID_H264
Definition: flv.h:110
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
live_flv_probe
static int live_flv_probe(const AVProbeData *p)
Definition: flvdec.c:113
key
const char * key
Definition: hwcontext_opencl.c:168
AVMEDIA_TYPE_DATA
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
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:703
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:65
time_internal.h
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:399
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: defs.h:54
AVFormatContext
Format I/O context.
Definition: avformat.h:1097
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:320
flv_read_close
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:800
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:992
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
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: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
AMF_DATA_TYPE_DATE
@ AMF_DATA_TYPE_DATE
Definition: flv.h:134
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1048
FLV_CODECID_H263
@ FLV_CODECID_H263
Definition: flv.h:105
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:762
FLV_AUDIO_SAMPLERATE_MASK
#define FLV_AUDIO_SAMPLERATE_MASK
Definition: flv.h:41
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
KEYFRAMES_TAG
#define KEYFRAMES_TAG
Definition: flv.h:49
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:894
FFStream::nb_index_entries
int nb_index_entries
Definition: internal.h:273
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
FLVContext::last_channels
int last_channels
Definition: flvdec.c:56
AV_CODEC_ID_FLASHSV
@ AV_CODEC_ID_FLASHSV
Definition: codec_id.h:136
FLVContext::keyframe_count
int keyframe_count
Definition: flvdec.c:71
AMF_DATA_TYPE_OBJECT_END
@ AMF_DATA_TYPE_OBJECT_END
Definition: flv.h:132
FLV_CODECID_MPEG4
@ FLV_CODECID_MPEG4
Definition: flv.h:112
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: codec_id.h:156
FLV_VIDEO_CODECID_MASK
#define FLV_VIDEO_CODECID_MASK
Definition: flv.h:44
FLV_FRAME_DISP_INTER
@ FLV_FRAME_DISP_INTER
disposable inter frame (H.263 only)
Definition: flv.h:118
FLV_CODECID_NELLYMOSER
@ FLV_CODECID_NELLYMOSER
Definition: flv.h:97
KEYFRAMES_BYTEOFFSET_TAG
#define KEYFRAMES_BYTEOFFSET_TAG
Definition: flv.h:51
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:456
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
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:78
AMFDataType
AMFDataType
Definition: flv.h:123
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: codec_id.h:424
FLV_TAG_TYPE_VIDEO
@ FLV_TAG_TYPE_VIDEO
Definition: flv.h:61
AMF_DATA_TYPE_MIXEDARRAY
@ AMF_DATA_TYPE_MIXEDARRAY
Definition: flv.h:131
AVDISCARD_NONKEY
@ AVDISCARD_NONKEY
discard all frames except keyframes
Definition: defs.h:53
flv.h
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
avio_rb24
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:766
AVMediaType
AVMediaType
Definition: avutil.h:199
AVPacket::size
int size
Definition: packet.h:374
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
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:262
FFStream
Definition: internal.h:188
AMF_DATA_TYPE_OBJECT
@ AMF_DATA_TYPE_OBJECT
Definition: flv.h:127
FLV_CODECID_NELLYMOSER_8KHZ_MONO
@ FLV_CODECID_NELLYMOSER_8KHZ_MONO
Definition: flv.h:96
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:365
size
int size
Definition: twinvq_data.h:10344
FLVContext
Definition: flvdec.c:47
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
FLV_CODECID_PCM_ALAW
@ FLV_CODECID_PCM_ALAW
Definition: flv.h:98
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_STREAM_TYPE_DATA
@ FLV_STREAM_TYPE_DATA
Definition: flv.h:69
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
FLV_CODECID_PCM_LE
@ FLV_CODECID_PCM_LE
Definition: flv.h:94
FLV_CODECID_SCREEN2
@ FLV_CODECID_SCREEN2
Definition: flv.h:109
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:372
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
FLV_AUDIO_CODECID_OFFSET
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
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
FLV_AUDIO_SAMPLESIZE_MASK
#define FLV_AUDIO_SAMPLESIZE_MASK
Definition: flv.h:40
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
version
version
Definition: libkvazaar.c:307
AMF_DATA_TYPE_UNDEFINED
@ AMF_DATA_TYPE_UNDEFINED
Definition: flv.h:129
KEYFRAMES_TIMESTAMP_TAG
#define KEYFRAMES_TIMESTAMP_TAG
Definition: flv.h:50
kux_probe
static int kux_probe(const AVProbeData *p)
Definition: flvdec.c:118
FLV_HEADER_FLAG_HASAUDIO
@ FLV_HEADER_FLAG_HASAUDIO
Definition: flv.h:56
AMF_DATA_TYPE_ARRAY
@ AMF_DATA_TYPE_ARRAY
Definition: flv.h:133
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:366
avio_internal.h
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:705
internal.h
AVCodecParameters::height
int height
Definition: codec_par.h:127
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:970
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:263
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:51
FLVContext::wrong_dts
int wrong_dts
wrong dts due to negative cts
Definition: flvdec.c:52
FLV_AUDIO_CHANNEL_MASK
#define FLV_AUDIO_CHANNEL_MASK
Definition: flv.h:39
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: utils.c:1273
flv_queue_extradata
static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, int size)
Definition: flvdec.c:823
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:196
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:106
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:845
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:246
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:758
AVSTREAM_PARSE_HEADERS
@ AVSTREAM_PARSE_HEADERS
Only parse headers, do not repack.
Definition: avformat.h:769
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:523
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:138
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:846
FLV_TAG_TYPE_AUDIO
@ FLV_TAG_TYPE_AUDIO
Definition: flv.h:60
FLV_CODECID_PCM
@ FLV_CODECID_PCM
Definition: flv.h:91
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:285
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
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:55
FLVContext::validate_index
struct FLVContext::@253 validate_index[2]
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
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:497
AMF_DATA_TYPE_NUMBER
@ AMF_DATA_TYPE_NUMBER
Definition: flv.h:124
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:778
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
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: utils.c:1146
AVPacket::stream_index
int stream_index
Definition: packet.h:375
FLV_STEREO
@ FLV_STEREO
Definition: flv.h:75
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:333
FLV_CODECID_SPEEX
@ FLV_CODECID_SPEEX
Definition: flv.h:101
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:271
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:102
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:469
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:318
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
flv_get_extradata
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
Definition: flvdec.c:811
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
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:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:241
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:393
FlvTagType
FlvTagType
Definition: flv.h:59
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
d
d
Definition: ffmpeg_filter.c:156
int32_t
int32_t
Definition: audioconvert.c:56
bytestream.h
AVSTREAM_PARSE_FULL
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:768
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:232
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:83
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AMF_DATA_TYPE_NULL
@ AMF_DATA_TYPE_NULL
Definition: flv.h:128
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
AVDictionaryEntry::value
char * value
Definition: dict.h:81
avstring.h
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:156
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_MULAW
@ FLV_CODECID_PCM_MULAW
Definition: flv.h:99
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:97
FLV_CODECID_VP6A
@ FLV_CODECID_VP6A
Definition: flv.h:108
AVFMT_EVENT_FLAG_METADATA_UPDATED
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1414
RESYNC_BUFFER_SIZE
#define RESYNC_BUFFER_SIZE
Definition: flvdec.c:43
AV_CODEC_ID_NELLYMOSER
@ AV_CODEC_ID_NELLYMOSER
Definition: codec_id.h:455
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:451
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:360