FFmpeg  4.3
flvdec.c
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1 /*
2  * FLV demuxer
3  * Copyright (c) 2003 The FFmpeg Project
4  *
5  * This demuxer will generate a 1 byte extradata for VP6F content.
6  * It is composed of:
7  * - upper 4 bits: difference between encoded width and visible width
8  * - lower 4 bits: difference between encoded height and visible height
9  *
10  * This file is part of FFmpeg.
11  *
12  * FFmpeg is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * FFmpeg is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with FFmpeg; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include "libavutil/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/intfloat.h"
32 #include "libavutil/mathematics.h"
34 #include "libavcodec/bytestream.h"
35 #include "avformat.h"
36 #include "internal.h"
37 #include "avio_internal.h"
38 #include "flv.h"
39 
40 #define VALIDATE_INDEX_TS_THRESH 2500
41 
42 #define RESYNC_BUFFER_SIZE (1<<20)
43 
44 typedef struct FLVContext {
45  const AVClass *class; ///< Class for private options.
46  int trust_metadata; ///< configure streams according onMetaData
47  int trust_datasize; ///< trust data size of FLVTag
48  int dump_full_metadata; ///< Dump full metadata of the onMetadata
49  int wrong_dts; ///< wrong dts due to negative cts
54  struct {
55  int64_t dts;
56  int64_t pos;
57  } validate_index[2];
61 
63 
66 
69  int64_t video_bit_rate;
70  int64_t audio_bit_rate;
71  int64_t *keyframe_times;
75  int64_t last_ts;
76  int64_t time_offset;
77  int64_t time_pos;
78 } FLVContext;
79 
80 /* AMF date type */
81 typedef struct amf_date {
82  double milliseconds;
83  int16_t timezone;
84 } amf_date;
85 
86 static int probe(const AVProbeData *p, int live)
87 {
88  const uint8_t *d = p->buf;
89  unsigned offset = AV_RB32(d + 5);
90 
91  if (d[0] == 'F' &&
92  d[1] == 'L' &&
93  d[2] == 'V' &&
94  d[3] < 5 && d[5] == 0 &&
95  offset + 100 < p->buf_size &&
96  offset > 8) {
97  int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
98 
99  if (live == is_live)
100  return AVPROBE_SCORE_MAX;
101  }
102  return 0;
103 }
104 
105 static int flv_probe(const AVProbeData *p)
106 {
107  return probe(p, 0);
108 }
109 
110 static int live_flv_probe(const AVProbeData *p)
111 {
112  return probe(p, 1);
113 }
114 
115 static int kux_probe(const AVProbeData *p)
116 {
117  const uint8_t *d = p->buf;
118 
119  if (d[0] == 'K' &&
120  d[1] == 'D' &&
121  d[2] == 'K' &&
122  d[3] == 0 &&
123  d[4] == 0) {
124  return AVPROBE_SCORE_EXTENSION + 1;
125  }
126  return 0;
127 }
128 
130 {
131  FLVContext *flv = s->priv_data;
132  AVStream *stream = NULL;
133  unsigned int i = 0;
134 
135  if (flv->last_keyframe_stream_index < 0) {
136  av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
137  return;
138  }
139 
141  stream = s->streams[flv->last_keyframe_stream_index];
142 
143  if (stream->nb_index_entries == 0) {
144  for (i = 0; i < flv->keyframe_count; i++) {
145  av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
146  flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000);
148  flv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME);
149  }
150  } else
151  av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
152 
153  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
154  av_freep(&flv->keyframe_times);
156  flv->keyframe_count = 0;
157  }
158 }
159 
161 {
162  FLVContext *flv = s->priv_data;
164  if (!st)
165  return NULL;
167  if (s->nb_streams>=3 ||( s->nb_streams==2
173  if (codec_type == AVMEDIA_TYPE_AUDIO) {
174  st->codecpar->bit_rate = flv->audio_bit_rate;
176  }
177  if (codec_type == AVMEDIA_TYPE_VIDEO) {
178  st->codecpar->bit_rate = flv->video_bit_rate;
180  st->avg_frame_rate = flv->framerate;
181  }
182 
183 
184  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
187  return st;
188 }
189 
191 {
192  int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
193  int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
194  int codec_id;
195 
196  if (!apar->codec_id && !apar->codec_tag)
197  return 1;
198 
199  if (apar->bits_per_coded_sample != bits_per_coded_sample)
200  return 0;
201 
202  switch (flv_codecid) {
203  // no distinction between S16 and S8 PCM codec flags
204  case FLV_CODECID_PCM:
205  codec_id = bits_per_coded_sample == 8
207 #if HAVE_BIGENDIAN
209 #else
211 #endif
212  return codec_id == apar->codec_id;
213  case FLV_CODECID_PCM_LE:
214  codec_id = bits_per_coded_sample == 8
217  return codec_id == apar->codec_id;
218  case FLV_CODECID_AAC:
219  return apar->codec_id == AV_CODEC_ID_AAC;
220  case FLV_CODECID_ADPCM:
221  return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
222  case FLV_CODECID_SPEEX:
223  return apar->codec_id == AV_CODEC_ID_SPEEX;
224  case FLV_CODECID_MP3:
225  return apar->codec_id == AV_CODEC_ID_MP3;
229  return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
231  return apar->sample_rate == 8000 &&
234  return apar->sample_rate == 8000 &&
236  default:
237  return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
238  }
239 }
240 
242  AVCodecParameters *apar, int flv_codecid)
243 {
244  switch (flv_codecid) {
245  // no distinction between S16 and S8 PCM codec flags
246  case FLV_CODECID_PCM:
247  apar->codec_id = apar->bits_per_coded_sample == 8
249 #if HAVE_BIGENDIAN
251 #else
253 #endif
254  break;
255  case FLV_CODECID_PCM_LE:
256  apar->codec_id = apar->bits_per_coded_sample == 8
259  break;
260  case FLV_CODECID_AAC:
261  apar->codec_id = AV_CODEC_ID_AAC;
262  break;
263  case FLV_CODECID_ADPCM:
265  break;
266  case FLV_CODECID_SPEEX:
267  apar->codec_id = AV_CODEC_ID_SPEEX;
268  apar->sample_rate = 16000;
269  break;
270  case FLV_CODECID_MP3:
271  apar->codec_id = AV_CODEC_ID_MP3;
273  break;
275  // in case metadata does not otherwise declare samplerate
276  apar->sample_rate = 8000;
278  break;
280  apar->sample_rate = 16000;
282  break;
285  break;
287  apar->sample_rate = 8000;
289  break;
291  apar->sample_rate = 8000;
293  break;
294  default:
295  avpriv_request_sample(s, "Audio codec (%x)",
296  flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
297  apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
298  }
299 }
300 
302 {
303  int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
304 
305  if (!vpar->codec_id && !vpar->codec_tag)
306  return 1;
307 
308  switch (flv_codecid) {
309  case FLV_CODECID_H263:
310  return vpar->codec_id == AV_CODEC_ID_FLV1;
311  case FLV_CODECID_SCREEN:
312  return vpar->codec_id == AV_CODEC_ID_FLASHSV;
313  case FLV_CODECID_SCREEN2:
314  return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
315  case FLV_CODECID_VP6:
316  return vpar->codec_id == AV_CODEC_ID_VP6F;
317  case FLV_CODECID_VP6A:
318  return vpar->codec_id == AV_CODEC_ID_VP6A;
319  case FLV_CODECID_H264:
320  return vpar->codec_id == AV_CODEC_ID_H264;
321  default:
322  return vpar->codec_tag == flv_codecid;
323  }
324 }
325 
327  int flv_codecid, int read)
328 {
329  int ret = 0;
330  AVCodecParameters *par = vstream->codecpar;
331  enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
332  switch (flv_codecid) {
333  case FLV_CODECID_H263:
334  par->codec_id = AV_CODEC_ID_FLV1;
335  break;
337  par->codec_id = AV_CODEC_ID_H263;
338  break; // Really mean it this time
339  case FLV_CODECID_SCREEN:
341  break;
342  case FLV_CODECID_SCREEN2:
344  break;
345  case FLV_CODECID_VP6:
346  par->codec_id = AV_CODEC_ID_VP6F;
347  case FLV_CODECID_VP6A:
348  if (flv_codecid == FLV_CODECID_VP6A)
349  par->codec_id = AV_CODEC_ID_VP6A;
350  if (read) {
351  if (par->extradata_size != 1) {
352  ff_alloc_extradata(par, 1);
353  }
354  if (par->extradata)
355  par->extradata[0] = avio_r8(s->pb);
356  else
357  avio_skip(s->pb, 1);
358  }
359  ret = 1; // 1 byte body size adjustment for flv_read_packet()
360  break;
361  case FLV_CODECID_H264:
362  par->codec_id = AV_CODEC_ID_H264;
364  ret = 3; // not 4, reading packet type will consume one byte
365  break;
366  case FLV_CODECID_MPEG4:
368  ret = 3;
369  break;
370  default:
371  avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
372  par->codec_tag = flv_codecid;
373  }
374 
375  if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
376  avpriv_request_sample(s, "Changing the codec id midstream");
377  return AVERROR_PATCHWELCOME;
378  }
379 
380  return ret;
381 }
382 
383 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
384 {
385  int length = avio_rb16(ioc);
386  if (length >= buffsize) {
387  avio_skip(ioc, length);
388  return -1;
389  }
390 
391  avio_read(ioc, buffer, length);
392 
393  buffer[length] = '\0';
394 
395  return length;
396 }
397 
399 {
400  FLVContext *flv = s->priv_data;
401  unsigned int timeslen = 0, fileposlen = 0, i;
402  char str_val[256];
403  int64_t *times = NULL;
404  int64_t *filepositions = NULL;
405  int ret = AVERROR(ENOSYS);
406  int64_t initial_pos = avio_tell(ioc);
407 
408  if (flv->keyframe_count > 0) {
409  av_log(s, AV_LOG_DEBUG, "keyframes have been parsed\n");
410  return 0;
411  }
412  av_assert0(!flv->keyframe_times);
414 
415  if (s->flags & AVFMT_FLAG_IGNIDX)
416  return 0;
417 
418  while (avio_tell(ioc) < max_pos - 2 &&
419  amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
420  int64_t **current_array;
421  unsigned int arraylen;
422 
423  // Expect array object in context
424  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
425  break;
426 
427  arraylen = avio_rb32(ioc);
428  if (arraylen>>28)
429  break;
430 
431  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
432  current_array = &times;
433  timeslen = arraylen;
434  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
435  !filepositions) {
436  current_array = &filepositions;
437  fileposlen = arraylen;
438  } else
439  // unexpected metatag inside keyframes, will not use such
440  // metadata for indexing
441  break;
442 
443  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
444  ret = AVERROR(ENOMEM);
445  goto finish;
446  }
447 
448  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
449  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
450  goto invalid;
451  current_array[0][i] = av_int2double(avio_rb64(ioc));
452  }
453  if (times && filepositions) {
454  // All done, exiting at a position allowing amf_parse_object
455  // to finish parsing the object
456  ret = 0;
457  break;
458  }
459  }
460 
461  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
462  for (i = 0; i < FFMIN(2,fileposlen); i++) {
463  flv->validate_index[i].pos = filepositions[i];
464  flv->validate_index[i].dts = times[i] * 1000;
465  flv->validate_count = i + 1;
466  }
467  flv->keyframe_times = times;
469  flv->keyframe_count = timeslen;
470  times = NULL;
471  filepositions = NULL;
472  } else {
473 invalid:
474  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
475  }
476 
477 finish:
478  av_freep(&times);
479  av_freep(&filepositions);
480  avio_seek(ioc, initial_pos, SEEK_SET);
481  return ret;
482 }
483 
485  AVStream *vstream, const char *key,
486  int64_t max_pos, int depth)
487 {
488  AVCodecParameters *apar, *vpar;
489  FLVContext *flv = s->priv_data;
490  AVIOContext *ioc;
491  AMFDataType amf_type;
492  char str_val[1024];
493  double num_val;
494  amf_date date;
495 
496  num_val = 0;
497  ioc = s->pb;
498  amf_type = avio_r8(ioc);
499 
500  switch (amf_type) {
502  num_val = av_int2double(avio_rb64(ioc));
503  break;
504  case AMF_DATA_TYPE_BOOL:
505  num_val = avio_r8(ioc);
506  break;
508  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
509  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
510  return -1;
511  }
512  break;
514  if (key &&
515  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
516  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
517  if (parse_keyframes_index(s, ioc,
518  max_pos) < 0)
519  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
520  else
522  while (avio_tell(ioc) < max_pos - 2 &&
523  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
524  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
525  depth + 1) < 0)
526  return -1; // if we couldn't skip, bomb out.
527  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
528  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
529  return -1;
530  }
531  break;
532  case AMF_DATA_TYPE_NULL:
535  break; // these take up no additional space
537  {
538  unsigned v;
539  avio_skip(ioc, 4); // skip 32-bit max array index
540  while (avio_tell(ioc) < max_pos - 2 &&
541  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
542  // this is the only case in which we would want a nested
543  // parse to not skip over the object
544  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
545  depth + 1) < 0)
546  return -1;
547  v = avio_r8(ioc);
548  if (v != AMF_END_OF_OBJECT) {
549  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
550  return -1;
551  }
552  break;
553  }
554  case AMF_DATA_TYPE_ARRAY:
555  {
556  unsigned int arraylen, i;
557 
558  arraylen = avio_rb32(ioc);
559  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
560  if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
561  depth + 1) < 0)
562  return -1; // if we couldn't skip, bomb out.
563  }
564  break;
565  case AMF_DATA_TYPE_DATE:
566  // timestamp (double) and UTC offset (int16)
567  date.milliseconds = av_int2double(avio_rb64(ioc));
568  date.timezone = avio_rb16(ioc);
569  break;
570  default: // unsupported type, we couldn't skip
571  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
572  return -1;
573  }
574 
575  if (key) {
576  apar = astream ? astream->codecpar : NULL;
577  vpar = vstream ? vstream->codecpar : NULL;
578 
579  // stream info doesn't live any deeper than the first object
580  if (depth == 1) {
581  if (amf_type == AMF_DATA_TYPE_NUMBER ||
582  amf_type == AMF_DATA_TYPE_BOOL) {
583  if (!strcmp(key, "duration"))
584  s->duration = num_val * AV_TIME_BASE;
585  else if (!strcmp(key, "videodatarate") &&
586  0 <= (int)(num_val * 1024.0))
587  flv->video_bit_rate = num_val * 1024.0;
588  else if (!strcmp(key, "audiodatarate") &&
589  0 <= (int)(num_val * 1024.0))
590  flv->audio_bit_rate = num_val * 1024.0;
591  else if (!strcmp(key, "datastream")) {
593  if (!st)
594  return AVERROR(ENOMEM);
596  } else if (!strcmp(key, "framerate")) {
597  flv->framerate = av_d2q(num_val, 1000);
598  if (vstream)
599  vstream->avg_frame_rate = flv->framerate;
600  } else if (flv->trust_metadata) {
601  if (!strcmp(key, "videocodecid") && vpar) {
602  int ret = flv_set_video_codec(s, vstream, num_val, 0);
603  if (ret < 0)
604  return ret;
605  } else if (!strcmp(key, "audiocodecid") && apar) {
606  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
607  flv_set_audio_codec(s, astream, apar, id);
608  } else if (!strcmp(key, "audiosamplerate") && apar) {
609  apar->sample_rate = num_val;
610  } else if (!strcmp(key, "audiosamplesize") && apar) {
611  apar->bits_per_coded_sample = num_val;
612  } else if (!strcmp(key, "stereo") && apar) {
613  apar->channels = num_val + 1;
614  apar->channel_layout = apar->channels == 2 ?
617  } else if (!strcmp(key, "width") && vpar) {
618  vpar->width = num_val;
619  } else if (!strcmp(key, "height") && vpar) {
620  vpar->height = num_val;
621  }
622  }
623  }
624  if (amf_type == AMF_DATA_TYPE_STRING) {
625  if (!strcmp(key, "encoder")) {
626  int version = -1;
627  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
628  if (version > 0 && version <= 655)
629  flv->broken_sizes = 1;
630  }
631  } else if (!strcmp(key, "metadatacreator")) {
632  if ( !strcmp (str_val, "MEGA")
633  || !strncmp(str_val, "FlixEngine", 10))
634  flv->broken_sizes = 1;
635  }
636  }
637  }
638 
639  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
640  ((!apar && !strcmp(key, "audiocodecid")) ||
641  (!vpar && !strcmp(key, "videocodecid"))))
642  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
643 
644  if ((!strcmp(key, "duration") ||
645  !strcmp(key, "filesize") ||
646  !strcmp(key, "width") ||
647  !strcmp(key, "height") ||
648  !strcmp(key, "videodatarate") ||
649  !strcmp(key, "framerate") ||
650  !strcmp(key, "videocodecid") ||
651  !strcmp(key, "audiodatarate") ||
652  !strcmp(key, "audiosamplerate") ||
653  !strcmp(key, "audiosamplesize") ||
654  !strcmp(key, "stereo") ||
655  !strcmp(key, "audiocodecid") ||
656  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
657  return 0;
658 
660  if (amf_type == AMF_DATA_TYPE_BOOL) {
661  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
662  sizeof(str_val));
663  av_dict_set(&s->metadata, key, str_val, 0);
664  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
665  snprintf(str_val, sizeof(str_val), "%.f", num_val);
666  av_dict_set(&s->metadata, key, str_val, 0);
667  } else if (amf_type == AMF_DATA_TYPE_STRING) {
668  av_dict_set(&s->metadata, key, str_val, 0);
669  } else if (amf_type == AMF_DATA_TYPE_DATE) {
670  time_t time;
671  struct tm t;
672  char datestr[128];
673  time = date.milliseconds / 1000; // to seconds
674  localtime_r(&time, &t);
675  strftime(datestr, sizeof(datestr), "%a, %d %b %Y %H:%M:%S %z", &t);
676 
677  av_dict_set(&s->metadata, key, datestr, 0);
678  }
679  }
680 
681  return 0;
682 }
683 
684 #define TYPE_ONTEXTDATA 1
685 #define TYPE_ONCAPTION 2
686 #define TYPE_ONCAPTIONINFO 3
687 #define TYPE_UNKNOWN 9
688 
689 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
690 {
691  FLVContext *flv = s->priv_data;
693  AVStream *stream, *astream, *vstream;
694  AVStream av_unused *dstream;
695  AVIOContext *ioc;
696  int i;
697  char buffer[32];
698 
699  astream = NULL;
700  vstream = NULL;
701  dstream = NULL;
702  ioc = s->pb;
703 
704  // first object needs to be "onMetaData" string
705  type = avio_r8(ioc);
706  if (type != AMF_DATA_TYPE_STRING ||
707  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
708  return TYPE_UNKNOWN;
709 
710  if (!strcmp(buffer, "onTextData"))
711  return TYPE_ONTEXTDATA;
712 
713  if (!strcmp(buffer, "onCaption"))
714  return TYPE_ONCAPTION;
715 
716  if (!strcmp(buffer, "onCaptionInfo"))
717  return TYPE_ONCAPTIONINFO;
718 
719  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
720  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
721  return TYPE_UNKNOWN;
722  }
723 
724  // find the streams now so that amf_parse_object doesn't need to do
725  // the lookup every time it is called.
726  for (i = 0; i < s->nb_streams; i++) {
727  stream = s->streams[i];
728  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
729  vstream = stream;
731  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
732  astream = stream;
733  if (flv->last_keyframe_stream_index == -1)
735  }
736  else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
737  dstream = stream;
738  }
739 
740  // parse the second object (we want a mixed array)
741  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
742  return -1;
743 
744  return 0;
745 }
746 
748 {
749  int flags;
750  FLVContext *flv = s->priv_data;
751  int offset;
752  int pre_tag_size = 0;
753 
754  /* Actual FLV data at 0xe40000 in KUX file */
755  if(!strcmp(s->iformat->name, "kux"))
756  avio_skip(s->pb, 0xe40000);
757 
758  avio_skip(s->pb, 4);
759  flags = avio_r8(s->pb);
760 
762 
764 
765  offset = avio_rb32(s->pb);
766  avio_seek(s->pb, offset, SEEK_SET);
767 
768  /* Annex E. The FLV File Format
769  * E.3 TheFLVFileBody
770  * Field Type Comment
771  * PreviousTagSize0 UI32 Always 0
772  * */
773  pre_tag_size = avio_rb32(s->pb);
774  if (pre_tag_size) {
775  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
776  }
777 
778  s->start_time = 0;
779  flv->sum_flv_tag_size = 0;
780  flv->last_keyframe_stream_index = -1;
781 
782  return 0;
783 }
784 
786 {
787  int i;
788  FLVContext *flv = s->priv_data;
789  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
790  av_freep(&flv->new_extradata[i]);
791  av_freep(&flv->keyframe_times);
793  return 0;
794 }
795 
797 {
798  int ret;
799  if (!size)
800  return 0;
801 
802  if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
803  return ret;
804  st->internal->need_context_update = 1;
805  return 0;
806 }
807 
808 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
809  int size)
810 {
811  if (!size)
812  return 0;
813 
814  av_free(flv->new_extradata[stream]);
815  flv->new_extradata[stream] = av_mallocz(size +
817  if (!flv->new_extradata[stream])
818  return AVERROR(ENOMEM);
819  flv->new_extradata_size[stream] = size;
820  avio_read(pb, flv->new_extradata[stream], size);
821  return 0;
822 }
823 
824 static void clear_index_entries(AVFormatContext *s, int64_t pos)
825 {
826  int i, j, out;
828  "Found invalid index entries, clearing the index.\n");
829  for (i = 0; i < s->nb_streams; i++) {
830  AVStream *st = s->streams[i];
831  /* Remove all index entries that point to >= pos */
832  out = 0;
833  for (j = 0; j < st->nb_index_entries; j++)
834  if (st->index_entries[j].pos < pos)
835  st->index_entries[out++] = st->index_entries[j];
836  st->nb_index_entries = out;
837  }
838 }
839 
841 {
842  int nb = -1, ret, parse_name = 1;
843 
844  switch (type) {
846  avio_skip(pb, 8);
847  break;
848  case AMF_DATA_TYPE_BOOL:
849  avio_skip(pb, 1);
850  break;
852  avio_skip(pb, avio_rb16(pb));
853  break;
854  case AMF_DATA_TYPE_ARRAY:
855  parse_name = 0;
857  nb = avio_rb32(pb);
859  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
860  if (parse_name) {
861  int size = avio_rb16(pb);
862  if (!size) {
863  avio_skip(pb, 1);
864  break;
865  }
866  avio_skip(pb, size);
867  }
868  if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
869  return ret;
870  }
871  break;
872  case AMF_DATA_TYPE_NULL:
874  break;
875  default:
876  return AVERROR_INVALIDDATA;
877  }
878  return 0;
879 }
880 
882  int64_t dts, int64_t next)
883 {
884  AVIOContext *pb = s->pb;
885  AVStream *st = NULL;
886  char buf[20];
887  int ret = AVERROR_INVALIDDATA;
888  int i, length = -1;
889  int array = 0;
890 
891  switch (avio_r8(pb)) {
892  case AMF_DATA_TYPE_ARRAY:
893  array = 1;
895  avio_seek(pb, 4, SEEK_CUR);
897  break;
898  default:
899  goto skip;
900  }
901 
902  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
903  AMFDataType type = avio_r8(pb);
904  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
905  length = avio_rb16(pb);
906  ret = av_get_packet(pb, pkt, length);
907  if (ret < 0)
908  goto skip;
909  else
910  break;
911  } else {
912  if ((ret = amf_skip_tag(pb, type)) < 0)
913  goto skip;
914  }
915  }
916 
917  if (length < 0) {
918  ret = AVERROR_INVALIDDATA;
919  goto skip;
920  }
921 
922  for (i = 0; i < s->nb_streams; i++) {
923  st = s->streams[i];
925  break;
926  }
927 
928  if (i == s->nb_streams) {
930  if (!st)
931  return AVERROR(ENOMEM);
933  }
934 
935  pkt->dts = dts;
936  pkt->pts = dts;
937  pkt->size = ret;
938 
939  pkt->stream_index = st->index;
940  pkt->flags |= AV_PKT_FLAG_KEY;
941 
942 skip:
943  avio_seek(s->pb, next + 4, SEEK_SET);
944 
945  return ret;
946 }
947 
949 {
950  FLVContext *flv = s->priv_data;
951  int64_t i;
952  int64_t pos = avio_tell(s->pb);
953 
954  for (i=0; !avio_feof(s->pb); i++) {
955  int j = i & (RESYNC_BUFFER_SIZE-1);
956  int j1 = j + RESYNC_BUFFER_SIZE;
957  flv->resync_buffer[j ] =
958  flv->resync_buffer[j1] = avio_r8(s->pb);
959 
960  if (i >= 8 && pos) {
961  uint8_t *d = flv->resync_buffer + j1 - 8;
962  if (d[0] == 'F' &&
963  d[1] == 'L' &&
964  d[2] == 'V' &&
965  d[3] < 5 && d[5] == 0) {
966  av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", flv->last_ts);
967  flv->time_offset = flv->last_ts + 1;
968  flv->time_pos = avio_tell(s->pb);
969  }
970  }
971 
972  if (i > 22) {
973  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
974  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
975  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
976  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
977  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
978  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
979  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
980  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
981  return 1;
982  }
983  }
984  }
985  }
986  }
987  return AVERROR_EOF;
988 }
989 
991 {
992  FLVContext *flv = s->priv_data;
993  int ret, i, size, flags;
994  enum FlvTagType type;
995  int stream_type=-1;
996  int64_t next, pos, meta_pos;
997  int64_t dts, pts = AV_NOPTS_VALUE;
998  int av_uninit(channels);
999  int av_uninit(sample_rate);
1000  AVStream *st = NULL;
1001  int last = -1;
1002  int orig_size;
1003 
1004 retry:
1005  /* pkt size is repeated at end. skip it */
1006  pos = avio_tell(s->pb);
1007  type = (avio_r8(s->pb) & 0x1F);
1008  orig_size =
1009  size = avio_rb24(s->pb);
1010  flv->sum_flv_tag_size += size + 11;
1011  dts = avio_rb24(s->pb);
1012  dts |= (unsigned)avio_r8(s->pb) << 24;
1013  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));
1014  if (avio_feof(s->pb))
1015  return AVERROR_EOF;
1016  avio_skip(s->pb, 3); /* stream id, always 0 */
1017  flags = 0;
1018 
1019  if (flv->validate_next < flv->validate_count) {
1020  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
1021  if (pos == validate_pos) {
1022  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
1024  flv->validate_next++;
1025  } else {
1026  clear_index_entries(s, validate_pos);
1027  flv->validate_count = 0;
1028  }
1029  } else if (pos > validate_pos) {
1030  clear_index_entries(s, validate_pos);
1031  flv->validate_count = 0;
1032  }
1033  }
1034 
1035  if (size == 0) {
1036  ret = FFERROR_REDO;
1037  goto leave;
1038  }
1039 
1040  next = size + avio_tell(s->pb);
1041 
1042  if (type == FLV_TAG_TYPE_AUDIO) {
1043  stream_type = FLV_STREAM_TYPE_AUDIO;
1044  flags = avio_r8(s->pb);
1045  size--;
1046  } else if (type == FLV_TAG_TYPE_VIDEO) {
1047  stream_type = FLV_STREAM_TYPE_VIDEO;
1048  flags = avio_r8(s->pb);
1049  size--;
1051  goto skip;
1052  } else if (type == FLV_TAG_TYPE_META) {
1053  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1054  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1055  int type;
1056  meta_pos = avio_tell(s->pb);
1057  type = flv_read_metabody(s, next);
1058  if (type == 0 && dts == 0 || type < 0) {
1059  if (type < 0 && flv->validate_count &&
1060  flv->validate_index[0].pos > next &&
1061  flv->validate_index[0].pos - 4 < next
1062  ) {
1063  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1064  next = flv->validate_index[0].pos - 4;
1065  }
1066  goto skip;
1067  } else if (type == TYPE_ONTEXTDATA) {
1068  avpriv_request_sample(s, "OnTextData packet");
1069  return flv_data_packet(s, pkt, dts, next);
1070  } else if (type == TYPE_ONCAPTION) {
1071  return flv_data_packet(s, pkt, dts, next);
1072  } else if (type == TYPE_UNKNOWN) {
1073  stream_type = FLV_STREAM_TYPE_DATA;
1074  }
1075  avio_seek(s->pb, meta_pos, SEEK_SET);
1076  }
1077  } else {
1078  av_log(s, AV_LOG_DEBUG,
1079  "Skipping flv packet: type %d, size %d, flags %d.\n",
1080  type, size, flags);
1081 skip:
1082  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1083  // This can happen if flv_read_metabody above read past
1084  // next, on a non-seekable input, and the preceding data has
1085  // been flushed out from the IO buffer.
1086  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1087  return AVERROR_INVALIDDATA;
1088  }
1089  ret = FFERROR_REDO;
1090  goto leave;
1091  }
1092 
1093  /* skip empty data packets */
1094  if (!size) {
1095  ret = FFERROR_REDO;
1096  goto leave;
1097  }
1098 
1099  /* now find stream */
1100  for (i = 0; i < s->nb_streams; i++) {
1101  st = s->streams[i];
1102  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1103  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1104  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1105  break;
1106  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1107  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1108  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1109  break;
1110  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1112  break;
1113  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1115  break;
1116  }
1117  }
1118  if (i == s->nb_streams) {
1120  st = create_stream(s, stream_types[stream_type]);
1121  if (!st)
1122  return AVERROR(ENOMEM);
1123 
1124  }
1125  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1126 
1127  if (flv->time_pos <= pos) {
1128  dts += flv->time_offset;
1129  }
1130 
1131  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1132  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
1133  stream_type == FLV_STREAM_TYPE_AUDIO))
1134  av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
1135 
1136  if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
1137  ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
1138  || st->discard >= AVDISCARD_ALL
1139  ) {
1140  avio_seek(s->pb, next, SEEK_SET);
1141  ret = FFERROR_REDO;
1142  goto leave;
1143  }
1144 
1145  // if not streamed and no duration from metadata then seek to end to find
1146  // the duration from the timestamps
1147  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1148  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1149  !flv->searched_for_end) {
1150  int size;
1151  const int64_t pos = avio_tell(s->pb);
1152  // Read the last 4 bytes of the file, this should be the size of the
1153  // previous FLV tag. Use the timestamp of its payload as duration.
1154  int64_t fsize = avio_size(s->pb);
1155 retry_duration:
1156  avio_seek(s->pb, fsize - 4, SEEK_SET);
1157  size = avio_rb32(s->pb);
1158  if (size > 0 && size < fsize) {
1159  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1160  // but skip the byte indicating the type.
1161  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1162  if (size == avio_rb24(s->pb) + 11) {
1163  uint32_t ts = avio_rb24(s->pb);
1164  ts |= avio_r8(s->pb) << 24;
1165  if (ts)
1166  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1167  else if (fsize >= 8 && fsize - 8 >= size) {
1168  fsize -= size+4;
1169  goto retry_duration;
1170  }
1171  }
1172  }
1173 
1174  avio_seek(s->pb, pos, SEEK_SET);
1175  flv->searched_for_end = 1;
1176  }
1177 
1178  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1179  int bits_per_coded_sample;
1180  channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
1181  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1183  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1184  if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1186  st->codecpar->channels = channels;
1187  st->codecpar->channel_layout = channels == 1
1191  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1192  }
1193  if (!st->codecpar->codec_id) {
1194  flv_set_audio_codec(s, st, st->codecpar,
1195  flags & FLV_AUDIO_CODECID_MASK);
1196  flv->last_sample_rate =
1198  flv->last_channels =
1199  channels = st->codecpar->channels;
1200  } else {
1202  if (!par) {
1203  ret = AVERROR(ENOMEM);
1204  goto leave;
1205  }
1206  par->sample_rate = sample_rate;
1207  par->bits_per_coded_sample = bits_per_coded_sample;
1208  flv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
1209  sample_rate = par->sample_rate;
1211  }
1212  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1213  int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
1214  if (ret < 0)
1215  return ret;
1216  size -= ret;
1217  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1219  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1220  st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1221  }
1222 
1223  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1226  int type = avio_r8(s->pb);
1227  size--;
1228 
1229  if (size < 0) {
1230  ret = AVERROR_INVALIDDATA;
1231  goto leave;
1232  }
1233 
1235  // sign extension
1236  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1237  pts = dts + cts;
1238  if (cts < 0) { // dts might be wrong
1239  if (!flv->wrong_dts)
1241  "Negative cts, previous timestamps might be wrong.\n");
1242  flv->wrong_dts = 1;
1243  } else if (FFABS(dts - pts) > 1000*60*15) {
1245  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1246  dts = pts = AV_NOPTS_VALUE;
1247  }
1248  }
1249  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1250  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1251  AVDictionaryEntry *t;
1252 
1253  if (st->codecpar->extradata) {
1254  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1255  return ret;
1256  ret = FFERROR_REDO;
1257  goto leave;
1258  }
1259  if ((ret = flv_get_extradata(s, st, size)) < 0)
1260  return ret;
1261 
1262  /* Workaround for buggy Omnia A/XE encoder */
1263  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1264  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1265  st->codecpar->extradata_size = 2;
1266 
1267  ret = FFERROR_REDO;
1268  goto leave;
1269  }
1270  }
1271 
1272  /* skip empty data packets */
1273  if (!size) {
1274  ret = FFERROR_REDO;
1275  goto leave;
1276  }
1277 
1278  ret = av_get_packet(s->pb, pkt, size);
1279  if (ret < 0)
1280  return ret;
1281  pkt->dts = dts;
1282  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1283  pkt->stream_index = st->index;
1284  pkt->pos = pos;
1285  if (flv->new_extradata[stream_type]) {
1287  flv->new_extradata[stream_type],
1288  flv->new_extradata_size[stream_type]);
1289  if (ret >= 0) {
1290  flv->new_extradata[stream_type] = NULL;
1291  flv->new_extradata_size[stream_type] = 0;
1292  }
1293  }
1294  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1295  (sample_rate != flv->last_sample_rate ||
1296  channels != flv->last_channels)) {
1298  flv->last_channels = channels;
1299  ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1300  }
1301 
1302  if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1303  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1304  stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1305  stream_type == FLV_STREAM_TYPE_DATA)
1306  pkt->flags |= AV_PKT_FLAG_KEY;
1307 
1308 leave:
1309  last = avio_rb32(s->pb);
1310  if (!flv->trust_datasize) {
1311  if (last != orig_size + 11 && last != orig_size + 10 &&
1312  !avio_feof(s->pb) &&
1313  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1314  !flv->broken_sizes) {
1315  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size);
1316  avio_seek(s->pb, pos + 1, SEEK_SET);
1317  ret = resync(s);
1318  av_packet_unref(pkt);
1319  if (ret >= 0) {
1320  goto retry;
1321  }
1322  }
1323  }
1324 
1325  if (ret >= 0)
1326  flv->last_ts = pkt->dts;
1327 
1328  return ret;
1329 }
1330 
1331 static int flv_read_seek(AVFormatContext *s, int stream_index,
1332  int64_t ts, int flags)
1333 {
1334  FLVContext *flv = s->priv_data;
1335  flv->validate_count = 0;
1336  return avio_seek_time(s->pb, stream_index, ts, flags);
1337 }
1338 
1339 #define OFFSET(x) offsetof(FLVContext, x)
1340 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1341 static const AVOption options[] = {
1342  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1343  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1344  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1345  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1346  { NULL }
1347 };
1348 
1349 static const AVClass flv_class = {
1350  .class_name = "flvdec",
1351  .item_name = av_default_item_name,
1352  .option = options,
1353  .version = LIBAVUTIL_VERSION_INT,
1354 };
1355 
1357  .name = "flv",
1358  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1359  .priv_data_size = sizeof(FLVContext),
1360  .read_probe = flv_probe,
1365  .extensions = "flv",
1366  .priv_class = &flv_class,
1367 };
1368 
1369 static const AVClass live_flv_class = {
1370  .class_name = "live_flvdec",
1371  .item_name = av_default_item_name,
1372  .option = options,
1373  .version = LIBAVUTIL_VERSION_INT,
1374 };
1375 
1377  .name = "live_flv",
1378  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1379  .priv_data_size = sizeof(FLVContext),
1385  .extensions = "flv",
1386  .priv_class = &live_flv_class,
1388 };
1389 
1390 static const AVClass kux_class = {
1391  .class_name = "kuxdec",
1392  .item_name = av_default_item_name,
1393  .option = options,
1394  .version = LIBAVUTIL_VERSION_INT,
1395 };
1396 
1398  .name = "kux",
1399  .long_name = NULL_IF_CONFIG_SMALL("KUX (YouKu)"),
1400  .priv_data_size = sizeof(FLVContext),
1401  .read_probe = kux_probe,
1406  .extensions = "kux",
1407  .priv_class = &kux_class,
1408 };
key frame (for AVC, a seekable frame)
Definition: flv.h:116
int missing_streams
Definition: flvdec.c:73
#define RESYNC_BUFFER_SIZE
Definition: flvdec.c:42
#define NULL
Definition: coverity.c:32
discard all frames except keyframes
Definition: avcodec.h:235
#define TYPE_ONCAPTIONINFO
Definition: flvdec.c:686
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
version
Definition: libkvazaar.c:292
int size
AVOption.
Definition: opt.h:246
#define AV_OPT_FLAG_EXPORT
The option is intended for exporting values to the caller.
Definition: opt.h:284
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2045
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static const int32_t max_pos[4]
Size of the MP-MLQ fixed excitation codebooks.
Definition: g723_1.h:728
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static void clear_index_entries(AVFormatContext *s, int64_t pos)
Definition: flvdec.c:824
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
int64_t pos
Definition: avformat.h:805
#define avpriv_request_sample(...)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
#define TYPE_ONCAPTION
Definition: flvdec.c:685
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
#define KEYFRAMES_TIMESTAMP_TAG
Definition: flv.h:50
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecParameters *apar, int flv_codecid)
Definition: flvdec.c:241
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, int64_t dts, int64_t next)
Definition: flvdec.c:881
int searched_for_end
Definition: flvdec.c:60
int trust_datasize
trust data size of FLVTag
Definition: flvdec.c:47
#define AV_RB24
Definition: intreadwrite.h:64
enum AVMediaType codec_type
Definition: rtp.c:37
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1666
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
const char * key
discard all
Definition: avcodec.h:236
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvdec.c:990
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
#define OFFSET(x)
Definition: flvdec.c:1339
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1331
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int64_t * keyframe_times
Definition: flvdec.c:71
Format I/O context.
Definition: avformat.h:1351
Definition: flv.h:75
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
AVInputFormat ff_kux_demuxer
Definition: flvdec.c:1397
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVFMT_FLAG_IGNIDX
Ignore index.
Definition: avformat.h:1484
Public dictionary API.
int64_t time_offset
Definition: flvdec.c:76
#define TYPE_ONTEXTDATA
Definition: flvdec.c:684
static char buffer[20]
Definition: seek.c:32
static av_always_inline double av_int2double(uint64_t i)
Reinterpret a 64-bit integer as a double.
Definition: intfloat.h:60
uint8_t
int validate_next
Definition: flvdec.c:58
#define VD
Definition: flvdec.c:1340
Opaque data information usually continuous.
Definition: avutil.h:203
int width
Video only.
Definition: codec_par.h:126
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
AVOptions.
#define FLV_AUDIO_CODECID_MASK
Definition: flv.h:42
int64_t pos
Definition: flvdec.c:56
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
int wrong_dts
wrong dts due to negative cts
Definition: flvdec.c:49
#define AV_RB32
Definition: intreadwrite.h:130
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
static const AVOption options[]
Definition: flvdec.c:1341
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
#define FFERROR_REDO
Returned by demuxers to indicate that data was consumed but discarded (ignored streams or junk data)...
Definition: internal.h:633
#define FLV_VIDEO_CODECID_MASK
Definition: flv.h:44
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
#define VALIDATE_INDEX_TS_THRESH
Definition: flvdec.c:40
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
static void finish(void)
Definition: movenc.c:345
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define FLV_AUDIO_SAMPLERATE_OFFSET
Definition: flv.h:33
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:304
AMFDataType
Definition: flv.h:123
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:899
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int trust_metadata
configure streams according onMetaData
Definition: flvdec.c:46
int validate_count
Definition: flvdec.c:59
channels
Definition: aptx.h:33
#define FLV_AUDIO_SAMPLERATE_MASK
Definition: flv.h:41
enum AVCodecID video_codec_id
Forced video codec_id.
Definition: avformat.h:1537
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
int64_t last_ts
Definition: flvdec.c:75
void avcodec_parameters_free(AVCodecParameters **par)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
Definition: utils.c:2053
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
Definition: flvdec.c:398
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
static void add_keyframes_index(AVFormatContext *s)
Definition: flvdec.c:129
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
#define TYPE_UNKNOWN
Definition: flvdec.c:687
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:464
discard all bidirectional frames
Definition: avcodec.h:233
#define AVERROR(e)
Definition: error.h:43
static int flv_read_close(AVFormatContext *s)
Definition: flvdec.c:785
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int flv_read_header(AVFormatContext *s)
Definition: flvdec.c:747
int64_t video_bit_rate
Definition: flvdec.c:69
ff_const59 struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1363
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
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:5070
static const AVClass kux_class
Definition: flvdec.c:1390
static AVStream * create_stream(AVFormatContext *s, int codec_type)
Definition: flvdec.c:160
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int64_t * keyframe_filepositions
Definition: flvdec.c:72
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
static int live_flv_probe(const AVProbeData *p)
Definition: flvdec.c:110
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
FLVFileposition * filepositions
Definition: flvenc.c:112
uint8_t * new_extradata[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:50
int broken_sizes
Definition: flvdec.c:64
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
uint8_t resync_buffer[2 *RESYNC_BUFFER_SIZE]
Definition: flvdec.c:62
static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read)
Definition: flvdec.c:326
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int64_t dts
Definition: flvdec.c:55
Only parse headers, do not repack.
Definition: avformat.h:796
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int last_keyframe_stream_index
Definition: flvdec.c:67
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
int64_t time_pos
Definition: flvdec.c:77
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
audio channel layout utility functions
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3321
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:771
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
int dump_full_metadata
Dump full metadata of the onMetadata.
Definition: flvdec.c:48
#define FFMIN(a, b)
Definition: common.h:96
enum AVCodecID audio_codec_id
Forced audio codec_id.
Definition: avformat.h:1543
int64_t audio_bit_rate
Definition: flvdec.c:70
static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
Definition: flvdec.c:190
int new_extradata_size[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:51
int32_t
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1667
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
disposable inter frame (H.263 only)
Definition: flv.h:118
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
static const AVClass flv_class
Definition: flvdec.c:1349
#define KEYFRAMES_TAG
Definition: flv.h:49
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static const AVClass live_flv_class
Definition: flvdec.c:1369
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int sum_flv_tag_size
Definition: flvdec.c:65
static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
Definition: flvdec.c:689
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: packet.h:55
sample_rate
FLV common header.
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1231
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
AVRational framerate
Definition: flvdec.c:74
static int resync(AVFormatContext *s)
Definition: flvdec.c:948
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
int last_sample_rate
Definition: flvdec.c:52
int nb_index_entries
Definition: avformat.h:1107
static int probe(const AVProbeData *p, int live)
Definition: flvdec.c:86
Describe the class of an AVClass context structure.
Definition: log.h:67
static int kux_probe(const AVProbeData *p)
Definition: flvdec.c:115
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct FLVContext::@252 validate_index[2]
FF_ENABLE_DEPRECATION_WARNINGS 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:298
int keyframe_count
Definition: flvdec.c:68
int last_channels
Definition: flvdec.c:53
cl_device_type type
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:189
static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, int size)
Definition: flvdec.c:808
AVMediaType
Definition: avutil.h:199
#define snprintf
Definition: snprintf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define FLV_AUDIO_CHANNEL_MASK
Definition: flv.h:39
int16_t timezone
Definition: flvdec.c:83
static int flv_probe(const AVProbeData *p)
Definition: flvdec.c:105
#define FLV_AUDIO_SAMPLESIZE_MASK
Definition: flv.h:40
video info/command frame
Definition: flv.h:120
#define AMF_END_OF_OBJECT
Definition: flv.h:47
#define KEYFRAMES_BYTEOFFSET_TAG
Definition: flv.h:51
static int64_t pts
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1456
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
Definition: rational.c:106
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
Definition: utils.c:2043
full parsing and repack
Definition: avformat.h:795
Main libavformat public API header.
int
raw UTF-8 text
Definition: codec_id.h:510
#define FLV_VIDEO_FRAMETYPE_MASK
Definition: flv.h:45
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3339
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
Definition: flvdec.c:383
#define localtime_r
Definition: time_internal.h:46
AVInputFormat ff_live_flv_demuxer
Definition: flvdec.c:1376
int flags
Definition: flvenc.c:120
AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1356
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
Definition: flvdec.c:840
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:1209
FlvTagType
Definition: flv.h:59
#define av_free(p)
char * value
Definition: dict.h:87
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth)
Definition: flvdec.c:484
void * priv_data
Format private data.
Definition: avformat.h:1379
#define AV_OPT_FLAG_READONLY
The option may not be set through the AVOptions API, only read.
Definition: opt.h:289
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
double milliseconds
Definition: flvdec.c:82
#define av_uninit(x)
Definition: attributes.h:154
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
Definition: flvdec.c:796
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
FILE * out
Definition: movenc.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
static int array[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:106
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
static int64_t fsize(FILE *f)
Definition: audiomatch.c:28
int stream_index
Definition: packet.h:357
#define AV_CH_LAYOUT_MONO
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
Definition: flvdec.c:301
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define av_unused
Definition: attributes.h:131