FFmpeg  4.3.6
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 #define MAX_DEPTH 16 ///< arbitrary limit to prevent unbounded recursion
45 
46 typedef struct FLVContext {
47  const AVClass *class; ///< Class for private options.
48  int trust_metadata; ///< configure streams according onMetaData
49  int trust_datasize; ///< trust data size of FLVTag
50  int dump_full_metadata; ///< Dump full metadata of the onMetadata
51  int wrong_dts; ///< wrong dts due to negative cts
56  struct {
57  int64_t dts;
58  int64_t pos;
59  } validate_index[2];
63 
65 
68 
71  int64_t video_bit_rate;
72  int64_t audio_bit_rate;
73  int64_t *keyframe_times;
77  int64_t last_ts;
78  int64_t time_offset;
79  int64_t time_pos;
80 } FLVContext;
81 
82 /* AMF date type */
83 typedef struct amf_date {
84  double milliseconds;
85  int16_t timezone;
86 } amf_date;
87 
88 static int probe(const AVProbeData *p, int live)
89 {
90  const uint8_t *d = p->buf;
91  unsigned offset = AV_RB32(d + 5);
92 
93  if (d[0] == 'F' &&
94  d[1] == 'L' &&
95  d[2] == 'V' &&
96  d[3] < 5 && d[5] == 0 &&
97  offset + 100 < p->buf_size &&
98  offset > 8) {
99  int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10);
100 
101  if (live == is_live)
102  return AVPROBE_SCORE_MAX;
103  }
104  return 0;
105 }
106 
107 static int flv_probe(const AVProbeData *p)
108 {
109  return probe(p, 0);
110 }
111 
112 static int live_flv_probe(const AVProbeData *p)
113 {
114  return probe(p, 1);
115 }
116 
117 static int kux_probe(const AVProbeData *p)
118 {
119  const uint8_t *d = p->buf;
120 
121  if (d[0] == 'K' &&
122  d[1] == 'D' &&
123  d[2] == 'K' &&
124  d[3] == 0 &&
125  d[4] == 0) {
126  return AVPROBE_SCORE_EXTENSION + 1;
127  }
128  return 0;
129 }
130 
132 {
133  FLVContext *flv = s->priv_data;
134  AVStream *stream = NULL;
135  unsigned int i = 0;
136 
137  if (flv->last_keyframe_stream_index < 0) {
138  av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
139  return;
140  }
141 
143  stream = s->streams[flv->last_keyframe_stream_index];
144 
145  if (stream->nb_index_entries == 0) {
146  for (i = 0; i < flv->keyframe_count; i++) {
147  av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
148  flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000);
150  flv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME);
151  }
152  } else
153  av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
154 
155  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
156  av_freep(&flv->keyframe_times);
158  flv->keyframe_count = 0;
159  }
160 }
161 
163 {
164  FLVContext *flv = s->priv_data;
166  if (!st)
167  return NULL;
169  if (s->nb_streams>=3 ||( s->nb_streams==2
175  if (codec_type == AVMEDIA_TYPE_AUDIO) {
176  st->codecpar->bit_rate = flv->audio_bit_rate;
178  }
179  if (codec_type == AVMEDIA_TYPE_VIDEO) {
180  st->codecpar->bit_rate = flv->video_bit_rate;
182  st->avg_frame_rate = flv->framerate;
183  }
184 
185 
186  avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
189  return st;
190 }
191 
193 {
194  int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
195  int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
196  int codec_id;
197 
198  if (!apar->codec_id && !apar->codec_tag)
199  return 1;
200 
201  if (apar->bits_per_coded_sample != bits_per_coded_sample)
202  return 0;
203 
204  switch (flv_codecid) {
205  // no distinction between S16 and S8 PCM codec flags
206  case FLV_CODECID_PCM:
207  codec_id = bits_per_coded_sample == 8
209 #if HAVE_BIGENDIAN
211 #else
213 #endif
214  return codec_id == apar->codec_id;
215  case FLV_CODECID_PCM_LE:
216  codec_id = bits_per_coded_sample == 8
219  return codec_id == apar->codec_id;
220  case FLV_CODECID_AAC:
221  return apar->codec_id == AV_CODEC_ID_AAC;
222  case FLV_CODECID_ADPCM:
223  return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
224  case FLV_CODECID_SPEEX:
225  return apar->codec_id == AV_CODEC_ID_SPEEX;
226  case FLV_CODECID_MP3:
227  return apar->codec_id == AV_CODEC_ID_MP3;
231  return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
233  return apar->sample_rate == 8000 &&
236  return apar->sample_rate == 8000 &&
238  default:
239  return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
240  }
241 }
242 
244  AVCodecParameters *apar, int flv_codecid)
245 {
246  switch (flv_codecid) {
247  // no distinction between S16 and S8 PCM codec flags
248  case FLV_CODECID_PCM:
249  apar->codec_id = apar->bits_per_coded_sample == 8
251 #if HAVE_BIGENDIAN
253 #else
255 #endif
256  break;
257  case FLV_CODECID_PCM_LE:
258  apar->codec_id = apar->bits_per_coded_sample == 8
261  break;
262  case FLV_CODECID_AAC:
263  apar->codec_id = AV_CODEC_ID_AAC;
264  break;
265  case FLV_CODECID_ADPCM:
267  break;
268  case FLV_CODECID_SPEEX:
269  apar->codec_id = AV_CODEC_ID_SPEEX;
270  apar->sample_rate = 16000;
271  break;
272  case FLV_CODECID_MP3:
273  apar->codec_id = AV_CODEC_ID_MP3;
275  break;
277  // in case metadata does not otherwise declare samplerate
278  apar->sample_rate = 8000;
280  break;
282  apar->sample_rate = 16000;
284  break;
287  break;
289  apar->sample_rate = 8000;
291  break;
293  apar->sample_rate = 8000;
295  break;
296  default:
297  avpriv_request_sample(s, "Audio codec (%x)",
298  flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
299  apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
300  }
301 }
302 
304 {
305  int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
306 
307  if (!vpar->codec_id && !vpar->codec_tag)
308  return 1;
309 
310  switch (flv_codecid) {
311  case FLV_CODECID_H263:
312  return vpar->codec_id == AV_CODEC_ID_FLV1;
313  case FLV_CODECID_SCREEN:
314  return vpar->codec_id == AV_CODEC_ID_FLASHSV;
315  case FLV_CODECID_SCREEN2:
316  return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
317  case FLV_CODECID_VP6:
318  return vpar->codec_id == AV_CODEC_ID_VP6F;
319  case FLV_CODECID_VP6A:
320  return vpar->codec_id == AV_CODEC_ID_VP6A;
321  case FLV_CODECID_H264:
322  return vpar->codec_id == AV_CODEC_ID_H264;
323  default:
324  return vpar->codec_tag == flv_codecid;
325  }
326 }
327 
329  int flv_codecid, int read)
330 {
331  int ret = 0;
332  AVCodecParameters *par = vstream->codecpar;
333  enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
334  switch (flv_codecid) {
335  case FLV_CODECID_H263:
336  par->codec_id = AV_CODEC_ID_FLV1;
337  break;
339  par->codec_id = AV_CODEC_ID_H263;
340  break; // Really mean it this time
341  case FLV_CODECID_SCREEN:
343  break;
344  case FLV_CODECID_SCREEN2:
346  break;
347  case FLV_CODECID_VP6:
348  par->codec_id = AV_CODEC_ID_VP6F;
349  case FLV_CODECID_VP6A:
350  if (flv_codecid == FLV_CODECID_VP6A)
351  par->codec_id = AV_CODEC_ID_VP6A;
352  if (read) {
353  if (par->extradata_size != 1) {
354  ff_alloc_extradata(par, 1);
355  }
356  if (par->extradata)
357  par->extradata[0] = avio_r8(s->pb);
358  else
359  avio_skip(s->pb, 1);
360  }
361  ret = 1; // 1 byte body size adjustment for flv_read_packet()
362  break;
363  case FLV_CODECID_H264:
364  par->codec_id = AV_CODEC_ID_H264;
366  ret = 3; // not 4, reading packet type will consume one byte
367  break;
368  case FLV_CODECID_MPEG4:
370  ret = 3;
371  break;
372  default:
373  avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
374  par->codec_tag = flv_codecid;
375  }
376 
377  if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
378  avpriv_request_sample(s, "Changing the codec id midstream");
379  return AVERROR_PATCHWELCOME;
380  }
381 
382  return ret;
383 }
384 
385 static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
386 {
387  int ret;
388  int length = avio_rb16(ioc);
389  if (length >= buffsize) {
390  avio_skip(ioc, length);
391  return -1;
392  }
393 
394  ret = avio_read(ioc, buffer, length);
395  if (ret < 0)
396  return ret;
397  if (ret < length)
398  return AVERROR_INVALIDDATA;
399 
400  buffer[length] = '\0';
401 
402  return length;
403 }
404 
406 {
407  FLVContext *flv = s->priv_data;
408  unsigned int timeslen = 0, fileposlen = 0, i;
409  char str_val[256];
410  int64_t *times = NULL;
411  int64_t *filepositions = NULL;
412  int ret = AVERROR(ENOSYS);
413  int64_t initial_pos = avio_tell(ioc);
414 
415  if (flv->keyframe_count > 0) {
416  av_log(s, AV_LOG_DEBUG, "keyframes have been parsed\n");
417  return 0;
418  }
419  av_assert0(!flv->keyframe_times);
421 
422  if (s->flags & AVFMT_FLAG_IGNIDX)
423  return 0;
424 
425  while (avio_tell(ioc) < max_pos - 2 &&
426  amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
427  int64_t **current_array;
428  unsigned int arraylen;
429 
430  // Expect array object in context
431  if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
432  break;
433 
434  arraylen = avio_rb32(ioc);
435  if (arraylen>>28)
436  break;
437 
438  if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
439  current_array = &times;
440  timeslen = arraylen;
441  } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
442  !filepositions) {
443  current_array = &filepositions;
444  fileposlen = arraylen;
445  } else
446  // unexpected metatag inside keyframes, will not use such
447  // metadata for indexing
448  break;
449 
450  if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
451  ret = AVERROR(ENOMEM);
452  goto finish;
453  }
454 
455  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
456  double d;
457  if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
458  goto invalid;
459  d = av_int2double(avio_rb64(ioc));
460  if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
461  goto invalid;
462  if (current_array == &times && (d <= INT64_MIN / 1000 || d >= INT64_MAX / 1000))
463  goto invalid;
464  if (avio_feof(ioc))
465  goto invalid;
466  current_array[0][i] = d;
467  }
468  if (times && filepositions) {
469  // All done, exiting at a position allowing amf_parse_object
470  // to finish parsing the object
471  ret = 0;
472  break;
473  }
474  }
475 
476  if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
477  for (i = 0; i < FFMIN(2,fileposlen); i++) {
478  flv->validate_index[i].pos = filepositions[i];
479  flv->validate_index[i].dts = times[i] * 1000;
480  flv->validate_count = i + 1;
481  }
482  flv->keyframe_times = times;
484  flv->keyframe_count = timeslen;
485  times = NULL;
486  filepositions = NULL;
487  } else {
488 invalid:
489  av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
490  }
491 
492 finish:
493  av_freep(&times);
494  av_freep(&filepositions);
495  avio_seek(ioc, initial_pos, SEEK_SET);
496  return ret;
497 }
498 
500  AVStream *vstream, const char *key,
501  int64_t max_pos, int depth)
502 {
503  AVCodecParameters *apar, *vpar;
504  FLVContext *flv = s->priv_data;
505  AVIOContext *ioc;
506  AMFDataType amf_type;
507  char str_val[1024];
508  double num_val;
509  amf_date date;
510 
511  if (depth > MAX_DEPTH)
512  return AVERROR_PATCHWELCOME;
513 
514  num_val = 0;
515  ioc = s->pb;
516  if (avio_feof(ioc))
517  return AVERROR_EOF;
518  amf_type = avio_r8(ioc);
519 
520  switch (amf_type) {
522  num_val = av_int2double(avio_rb64(ioc));
523  break;
524  case AMF_DATA_TYPE_BOOL:
525  num_val = avio_r8(ioc);
526  break;
528  if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) {
529  av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
530  return -1;
531  }
532  break;
534  if (key &&
535  (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
536  !strcmp(KEYFRAMES_TAG, key) && depth == 1)
537  if (parse_keyframes_index(s, ioc,
538  max_pos) < 0)
539  av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
540  else
542  while (avio_tell(ioc) < max_pos - 2 &&
543  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
544  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
545  depth + 1) < 0)
546  return -1; // if we couldn't skip, bomb out.
547  if (avio_r8(ioc) != AMF_END_OF_OBJECT) {
548  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
549  return -1;
550  }
551  break;
552  case AMF_DATA_TYPE_NULL:
555  break; // these take up no additional space
557  {
558  unsigned v;
559  avio_skip(ioc, 4); // skip 32-bit max array index
560  while (avio_tell(ioc) < max_pos - 2 &&
561  amf_get_string(ioc, str_val, sizeof(str_val)) > 0)
562  // this is the only case in which we would want a nested
563  // parse to not skip over the object
564  if (amf_parse_object(s, astream, vstream, str_val, max_pos,
565  depth + 1) < 0)
566  return -1;
567  v = avio_r8(ioc);
568  if (v != AMF_END_OF_OBJECT) {
569  av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
570  return -1;
571  }
572  break;
573  }
574  case AMF_DATA_TYPE_ARRAY:
575  {
576  unsigned int arraylen, i;
577 
578  arraylen = avio_rb32(ioc);
579  for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
580  if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
581  depth + 1) < 0)
582  return -1; // if we couldn't skip, bomb out.
583  }
584  break;
585  case AMF_DATA_TYPE_DATE:
586  // timestamp (double) and UTC offset (int16)
587  date.milliseconds = av_int2double(avio_rb64(ioc));
588  date.timezone = avio_rb16(ioc);
589  break;
590  default: // unsupported type, we couldn't skip
591  av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
592  return -1;
593  }
594 
595  if (key) {
596  apar = astream ? astream->codecpar : NULL;
597  vpar = vstream ? vstream->codecpar : NULL;
598 
599  // stream info doesn't live any deeper than the first object
600  if (depth == 1) {
601  if (amf_type == AMF_DATA_TYPE_NUMBER ||
602  amf_type == AMF_DATA_TYPE_BOOL) {
603  if (!strcmp(key, "duration"))
604  s->duration = num_val * AV_TIME_BASE;
605  else if (!strcmp(key, "videodatarate") &&
606  0 <= (int)(num_val * 1024.0))
607  flv->video_bit_rate = num_val * 1024.0;
608  else if (!strcmp(key, "audiodatarate") &&
609  0 <= (int)(num_val * 1024.0))
610  flv->audio_bit_rate = num_val * 1024.0;
611  else if (!strcmp(key, "datastream")) {
613  if (!st)
614  return AVERROR(ENOMEM);
616  } else if (!strcmp(key, "framerate")) {
617  flv->framerate = av_d2q(num_val, 1000);
618  if (vstream)
619  vstream->avg_frame_rate = flv->framerate;
620  } else if (flv->trust_metadata) {
621  if (!strcmp(key, "videocodecid") && vpar) {
622  int ret = flv_set_video_codec(s, vstream, num_val, 0);
623  if (ret < 0)
624  return ret;
625  } else if (!strcmp(key, "audiocodecid") && apar) {
626  int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
627  flv_set_audio_codec(s, astream, apar, id);
628  } else if (!strcmp(key, "audiosamplerate") && apar) {
629  apar->sample_rate = num_val;
630  } else if (!strcmp(key, "audiosamplesize") && apar) {
631  apar->bits_per_coded_sample = num_val;
632  } else if (!strcmp(key, "stereo") && apar) {
633  apar->channels = num_val + 1;
634  apar->channel_layout = apar->channels == 2 ?
637  } else if (!strcmp(key, "width") && vpar) {
638  vpar->width = num_val;
639  } else if (!strcmp(key, "height") && vpar) {
640  vpar->height = num_val;
641  }
642  }
643  }
644  if (amf_type == AMF_DATA_TYPE_STRING) {
645  if (!strcmp(key, "encoder")) {
646  int version = -1;
647  if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
648  if (version > 0 && version <= 655)
649  flv->broken_sizes = 1;
650  }
651  } else if (!strcmp(key, "metadatacreator")) {
652  if ( !strcmp (str_val, "MEGA")
653  || !strncmp(str_val, "FlixEngine", 10))
654  flv->broken_sizes = 1;
655  }
656  }
657  }
658 
659  if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
660  ((!apar && !strcmp(key, "audiocodecid")) ||
661  (!vpar && !strcmp(key, "videocodecid"))))
662  s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
663 
664  if ((!strcmp(key, "duration") ||
665  !strcmp(key, "filesize") ||
666  !strcmp(key, "width") ||
667  !strcmp(key, "height") ||
668  !strcmp(key, "videodatarate") ||
669  !strcmp(key, "framerate") ||
670  !strcmp(key, "videocodecid") ||
671  !strcmp(key, "audiodatarate") ||
672  !strcmp(key, "audiosamplerate") ||
673  !strcmp(key, "audiosamplesize") ||
674  !strcmp(key, "stereo") ||
675  !strcmp(key, "audiocodecid") ||
676  !strcmp(key, "datastream")) && !flv->dump_full_metadata)
677  return 0;
678 
680  if (amf_type == AMF_DATA_TYPE_BOOL) {
681  av_strlcpy(str_val, num_val > 0 ? "true" : "false",
682  sizeof(str_val));
683  av_dict_set(&s->metadata, key, str_val, 0);
684  } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
685  snprintf(str_val, sizeof(str_val), "%.f", num_val);
686  av_dict_set(&s->metadata, key, str_val, 0);
687  } else if (amf_type == AMF_DATA_TYPE_STRING) {
688  av_dict_set(&s->metadata, key, str_val, 0);
689  } else if (amf_type == AMF_DATA_TYPE_DATE) {
690  time_t time;
691  struct tm t;
692  char datestr[128];
693  time = date.milliseconds / 1000; // to seconds
694  localtime_r(&time, &t);
695  strftime(datestr, sizeof(datestr), "%a, %d %b %Y %H:%M:%S %z", &t);
696 
697  av_dict_set(&s->metadata, key, datestr, 0);
698  }
699  }
700 
701  return 0;
702 }
703 
704 #define TYPE_ONTEXTDATA 1
705 #define TYPE_ONCAPTION 2
706 #define TYPE_ONCAPTIONINFO 3
707 #define TYPE_UNKNOWN 9
708 
709 static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
710 {
711  FLVContext *flv = s->priv_data;
713  AVStream *stream, *astream, *vstream;
714  AVStream av_unused *dstream;
715  AVIOContext *ioc;
716  int i;
717  char buffer[32];
718 
719  astream = NULL;
720  vstream = NULL;
721  dstream = NULL;
722  ioc = s->pb;
723 
724  // first object needs to be "onMetaData" string
725  type = avio_r8(ioc);
726  if (type != AMF_DATA_TYPE_STRING ||
727  amf_get_string(ioc, buffer, sizeof(buffer)) < 0)
728  return TYPE_UNKNOWN;
729 
730  if (!strcmp(buffer, "onTextData"))
731  return TYPE_ONTEXTDATA;
732 
733  if (!strcmp(buffer, "onCaption"))
734  return TYPE_ONCAPTION;
735 
736  if (!strcmp(buffer, "onCaptionInfo"))
737  return TYPE_ONCAPTIONINFO;
738 
739  if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
740  av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
741  return TYPE_UNKNOWN;
742  }
743 
744  // find the streams now so that amf_parse_object doesn't need to do
745  // the lookup every time it is called.
746  for (i = 0; i < s->nb_streams; i++) {
747  stream = s->streams[i];
748  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
749  vstream = stream;
751  } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
752  astream = stream;
753  if (flv->last_keyframe_stream_index == -1)
755  }
756  else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
757  dstream = stream;
758  }
759 
760  // parse the second object (we want a mixed array)
761  if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
762  return -1;
763 
764  return 0;
765 }
766 
768 {
769  int flags;
770  FLVContext *flv = s->priv_data;
771  int offset;
772  int pre_tag_size = 0;
773 
774  /* Actual FLV data at 0xe40000 in KUX file */
775  if(!strcmp(s->iformat->name, "kux"))
776  avio_skip(s->pb, 0xe40000);
777 
778  avio_skip(s->pb, 4);
779  flags = avio_r8(s->pb);
780 
782 
784 
785  offset = avio_rb32(s->pb);
786  avio_seek(s->pb, offset, SEEK_SET);
787 
788  /* Annex E. The FLV File Format
789  * E.3 TheFLVFileBody
790  * Field Type Comment
791  * PreviousTagSize0 UI32 Always 0
792  * */
793  pre_tag_size = avio_rb32(s->pb);
794  if (pre_tag_size) {
795  av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n");
796  }
797 
798  s->start_time = 0;
799  flv->sum_flv_tag_size = 0;
800  flv->last_keyframe_stream_index = -1;
801 
802  return 0;
803 }
804 
806 {
807  int i;
808  FLVContext *flv = s->priv_data;
809  for (i=0; i<FLV_STREAM_TYPE_NB; i++)
810  av_freep(&flv->new_extradata[i]);
811  av_freep(&flv->keyframe_times);
813  return 0;
814 }
815 
817 {
818  int ret;
819  if (!size)
820  return 0;
821 
822  if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0)
823  return ret;
824  st->internal->need_context_update = 1;
825  return 0;
826 }
827 
828 static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream,
829  int size)
830 {
831  if (!size)
832  return 0;
833 
834  av_free(flv->new_extradata[stream]);
835  flv->new_extradata[stream] = av_mallocz(size +
837  if (!flv->new_extradata[stream])
838  return AVERROR(ENOMEM);
839  flv->new_extradata_size[stream] = size;
840  avio_read(pb, flv->new_extradata[stream], size);
841  return 0;
842 }
843 
844 static void clear_index_entries(AVFormatContext *s, int64_t pos)
845 {
846  int i, j, out;
848  "Found invalid index entries, clearing the index.\n");
849  for (i = 0; i < s->nb_streams; i++) {
850  AVStream *st = s->streams[i];
851  /* Remove all index entries that point to >= pos */
852  out = 0;
853  for (j = 0; j < st->nb_index_entries; j++)
854  if (st->index_entries[j].pos < pos)
855  st->index_entries[out++] = st->index_entries[j];
856  st->nb_index_entries = out;
857  }
858 }
859 
860 static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
861 {
862  int nb = -1, ret, parse_name = 1;
863 
864  if (depth > MAX_DEPTH)
865  return AVERROR_PATCHWELCOME;
866 
867  if (avio_feof(pb))
868  return AVERROR_EOF;
869 
870  switch (type) {
872  avio_skip(pb, 8);
873  break;
874  case AMF_DATA_TYPE_BOOL:
875  avio_skip(pb, 1);
876  break;
878  avio_skip(pb, avio_rb16(pb));
879  break;
880  case AMF_DATA_TYPE_ARRAY:
881  parse_name = 0;
883  nb = avio_rb32(pb);
884  if (nb < 0)
885  return AVERROR_INVALIDDATA;
887  while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
888  if (parse_name) {
889  int size = avio_rb16(pb);
890  if (!size) {
891  avio_skip(pb, 1);
892  break;
893  }
894  avio_skip(pb, size);
895  }
896  if ((ret = amf_skip_tag(pb, avio_r8(pb), depth + 1)) < 0)
897  return ret;
898  }
899  break;
900  case AMF_DATA_TYPE_NULL:
902  break;
903  default:
904  return AVERROR_INVALIDDATA;
905  }
906  return 0;
907 }
908 
910  int64_t dts, int64_t next)
911 {
912  AVIOContext *pb = s->pb;
913  AVStream *st = NULL;
914  char buf[20];
915  int ret = AVERROR_INVALIDDATA;
916  int i, length = -1;
917  int array = 0;
918 
919  switch (avio_r8(pb)) {
920  case AMF_DATA_TYPE_ARRAY:
921  array = 1;
923  avio_seek(pb, 4, SEEK_CUR);
925  break;
926  default:
927  goto skip;
928  }
929 
930  while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) {
931  AMFDataType type = avio_r8(pb);
932  if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
933  length = avio_rb16(pb);
934  ret = av_get_packet(pb, pkt, length);
935  if (ret < 0)
936  goto skip;
937  else
938  break;
939  } else {
940  if ((ret = amf_skip_tag(pb, type, 0)) < 0)
941  goto skip;
942  }
943  }
944 
945  if (length < 0) {
946  ret = AVERROR_INVALIDDATA;
947  goto skip;
948  }
949 
950  for (i = 0; i < s->nb_streams; i++) {
951  st = s->streams[i];
953  break;
954  }
955 
956  if (i == s->nb_streams) {
958  if (!st)
959  return AVERROR(ENOMEM);
961  }
962 
963  pkt->dts = dts;
964  pkt->pts = dts;
965  pkt->size = ret;
966 
967  pkt->stream_index = st->index;
968  pkt->flags |= AV_PKT_FLAG_KEY;
969 
970 skip:
971  avio_seek(s->pb, next + 4, SEEK_SET);
972 
973  return ret;
974 }
975 
977 {
978  FLVContext *flv = s->priv_data;
979  int64_t i;
980  int64_t pos = avio_tell(s->pb);
981 
982  for (i=0; !avio_feof(s->pb); i++) {
983  int j = i & (RESYNC_BUFFER_SIZE-1);
984  int j1 = j + RESYNC_BUFFER_SIZE;
985  flv->resync_buffer[j ] =
986  flv->resync_buffer[j1] = avio_r8(s->pb);
987 
988  if (i >= 8 && pos) {
989  uint8_t *d = flv->resync_buffer + j1 - 8;
990  if (d[0] == 'F' &&
991  d[1] == 'L' &&
992  d[2] == 'V' &&
993  d[3] < 5 && d[5] == 0) {
994  av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", flv->last_ts);
995  flv->time_offset = flv->last_ts + 1;
996  flv->time_pos = avio_tell(s->pb);
997  }
998  }
999 
1000  if (i > 22) {
1001  unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4);
1002  if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
1003  unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4);
1004  unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8);
1005  if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
1006  unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
1007  if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
1008  avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
1009  return 1;
1010  }
1011  }
1012  }
1013  }
1014  }
1015  return AVERROR_EOF;
1016 }
1017 
1019 {
1020  FLVContext *flv = s->priv_data;
1021  int ret, i, size, flags;
1022  enum FlvTagType type;
1023  int stream_type=-1;
1024  int64_t next, pos, meta_pos;
1025  int64_t dts, pts = AV_NOPTS_VALUE;
1026  int av_uninit(channels);
1027  int av_uninit(sample_rate);
1028  AVStream *st = NULL;
1029  int last = -1;
1030  int orig_size;
1031 
1032 retry:
1033  /* pkt size is repeated at end. skip it */
1034  pos = avio_tell(s->pb);
1035  type = (avio_r8(s->pb) & 0x1F);
1036  orig_size =
1037  size = avio_rb24(s->pb);
1038  flv->sum_flv_tag_size += size + 11LL;
1039  dts = avio_rb24(s->pb);
1040  dts |= (unsigned)avio_r8(s->pb) << 24;
1041  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));
1042  if (avio_feof(s->pb))
1043  return AVERROR_EOF;
1044  avio_skip(s->pb, 3); /* stream id, always 0 */
1045  flags = 0;
1046 
1047  if (flv->validate_next < flv->validate_count) {
1048  int64_t validate_pos = flv->validate_index[flv->validate_next].pos;
1049  if (pos == validate_pos) {
1050  if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <=
1052  flv->validate_next++;
1053  } else {
1054  clear_index_entries(s, validate_pos);
1055  flv->validate_count = 0;
1056  }
1057  } else if (pos > validate_pos) {
1058  clear_index_entries(s, validate_pos);
1059  flv->validate_count = 0;
1060  }
1061  }
1062 
1063  if (size == 0) {
1064  ret = FFERROR_REDO;
1065  goto leave;
1066  }
1067 
1068  next = size + avio_tell(s->pb);
1069 
1070  if (type == FLV_TAG_TYPE_AUDIO) {
1071  stream_type = FLV_STREAM_TYPE_AUDIO;
1072  flags = avio_r8(s->pb);
1073  size--;
1074  } else if (type == FLV_TAG_TYPE_VIDEO) {
1075  stream_type = FLV_STREAM_TYPE_VIDEO;
1076  flags = avio_r8(s->pb);
1077  size--;
1079  goto skip;
1080  } else if (type == FLV_TAG_TYPE_META) {
1081  stream_type=FLV_STREAM_TYPE_SUBTITLE;
1082  if (size > 13 + 1 + 4) { // Header-type metadata stuff
1083  int type;
1084  meta_pos = avio_tell(s->pb);
1085  type = flv_read_metabody(s, next);
1086  if (type == 0 && dts == 0 || type < 0) {
1087  if (type < 0 && flv->validate_count &&
1088  flv->validate_index[0].pos > next &&
1089  flv->validate_index[0].pos - 4 < next
1090  ) {
1091  av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
1092  next = flv->validate_index[0].pos - 4;
1093  }
1094  goto skip;
1095  } else if (type == TYPE_ONTEXTDATA) {
1096  avpriv_request_sample(s, "OnTextData packet");
1097  return flv_data_packet(s, pkt, dts, next);
1098  } else if (type == TYPE_ONCAPTION) {
1099  return flv_data_packet(s, pkt, dts, next);
1100  } else if (type == TYPE_UNKNOWN) {
1101  stream_type = FLV_STREAM_TYPE_DATA;
1102  }
1103  avio_seek(s->pb, meta_pos, SEEK_SET);
1104  }
1105  } else {
1106  av_log(s, AV_LOG_DEBUG,
1107  "Skipping flv packet: type %d, size %d, flags %d.\n",
1108  type, size, flags);
1109 skip:
1110  if (avio_seek(s->pb, next, SEEK_SET) != next) {
1111  // This can happen if flv_read_metabody above read past
1112  // next, on a non-seekable input, and the preceding data has
1113  // been flushed out from the IO buffer.
1114  av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
1115  return AVERROR_INVALIDDATA;
1116  }
1117  ret = FFERROR_REDO;
1118  goto leave;
1119  }
1120 
1121  /* skip empty data packets */
1122  if (!size) {
1123  ret = FFERROR_REDO;
1124  goto leave;
1125  }
1126 
1127  /* now find stream */
1128  for (i = 0; i < s->nb_streams; i++) {
1129  st = s->streams[i];
1130  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1131  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1132  (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
1133  break;
1134  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1135  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1136  (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
1137  break;
1138  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1140  break;
1141  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1143  break;
1144  }
1145  }
1146  if (i == s->nb_streams) {
1148  st = create_stream(s, stream_types[stream_type]);
1149  if (!st)
1150  return AVERROR(ENOMEM);
1151 
1152  }
1153  av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
1154 
1155  if (flv->time_pos <= pos) {
1156  dts += flv->time_offset;
1157  }
1158 
1159  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1160  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
1161  stream_type == FLV_STREAM_TYPE_AUDIO))
1162  av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
1163 
1164  if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
1165  ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
1166  || st->discard >= AVDISCARD_ALL
1167  ) {
1168  avio_seek(s->pb, next, SEEK_SET);
1169  ret = FFERROR_REDO;
1170  goto leave;
1171  }
1172 
1173  // if not streamed and no duration from metadata then seek to end to find
1174  // the duration from the timestamps
1175  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
1176  (!s->duration || s->duration == AV_NOPTS_VALUE) &&
1177  !flv->searched_for_end) {
1178  int size;
1179  const int64_t pos = avio_tell(s->pb);
1180  // Read the last 4 bytes of the file, this should be the size of the
1181  // previous FLV tag. Use the timestamp of its payload as duration.
1182  int64_t fsize = avio_size(s->pb);
1183 retry_duration:
1184  avio_seek(s->pb, fsize - 4, SEEK_SET);
1185  size = avio_rb32(s->pb);
1186  if (size > 0 && size < fsize) {
1187  // Seek to the start of the last FLV tag at position (fsize - 4 - size)
1188  // but skip the byte indicating the type.
1189  avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
1190  if (size == avio_rb24(s->pb) + 11) {
1191  uint32_t ts = avio_rb24(s->pb);
1192  ts |= (unsigned)avio_r8(s->pb) << 24;
1193  if (ts)
1194  s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
1195  else if (fsize >= 8 && fsize - 8 >= size) {
1196  fsize -= size+4;
1197  goto retry_duration;
1198  }
1199  }
1200  }
1201 
1202  avio_seek(s->pb, pos, SEEK_SET);
1203  flv->searched_for_end = 1;
1204  }
1205 
1206  if (stream_type == FLV_STREAM_TYPE_AUDIO) {
1207  int bits_per_coded_sample;
1208  channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
1209  sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
1211  bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
1212  if (!st->codecpar->channels || !st->codecpar->sample_rate ||
1214  st->codecpar->channels = channels;
1215  st->codecpar->channel_layout = channels == 1
1219  st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
1220  }
1221  if (!st->codecpar->codec_id) {
1222  flv_set_audio_codec(s, st, st->codecpar,
1223  flags & FLV_AUDIO_CODECID_MASK);
1224  flv->last_sample_rate =
1226  flv->last_channels =
1227  channels = st->codecpar->channels;
1228  } else {
1230  if (!par) {
1231  ret = AVERROR(ENOMEM);
1232  goto leave;
1233  }
1234  par->sample_rate = sample_rate;
1235  par->bits_per_coded_sample = bits_per_coded_sample;
1236  flv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
1237  sample_rate = par->sample_rate;
1239  }
1240  } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
1241  int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
1242  if (ret < 0)
1243  return ret;
1244  size -= ret;
1245  } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
1247  } else if (stream_type == FLV_STREAM_TYPE_DATA) {
1248  st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
1249  }
1250 
1251  if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1254  int type = avio_r8(s->pb);
1255  size--;
1256 
1257  if (size < 0) {
1258  ret = AVERROR_INVALIDDATA;
1259  goto leave;
1260  }
1261 
1263  // sign extension
1264  int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
1265  pts = av_sat_add64(dts, cts);
1266  if (cts < 0) { // dts might be wrong
1267  if (!flv->wrong_dts)
1269  "Negative cts, previous timestamps might be wrong.\n");
1270  flv->wrong_dts = 1;
1271  } else if (FFABS(dts - pts) > 1000*60*15) {
1273  "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
1274  dts = pts = AV_NOPTS_VALUE;
1275  }
1276  }
1277  if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
1278  st->codecpar->codec_id == AV_CODEC_ID_H264)) {
1279  AVDictionaryEntry *t;
1280 
1281  if (st->codecpar->extradata) {
1282  if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0)
1283  return ret;
1284  ret = FFERROR_REDO;
1285  goto leave;
1286  }
1287  if ((ret = flv_get_extradata(s, st, size)) < 0)
1288  return ret;
1289 
1290  /* Workaround for buggy Omnia A/XE encoder */
1291  t = av_dict_get(s->metadata, "Encoder", NULL, 0);
1292  if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
1293  st->codecpar->extradata_size = 2;
1294 
1295  ret = FFERROR_REDO;
1296  goto leave;
1297  }
1298  }
1299 
1300  /* skip empty data packets */
1301  if (!size) {
1302  ret = FFERROR_REDO;
1303  goto leave;
1304  }
1305 
1306  ret = av_get_packet(s->pb, pkt, size);
1307  if (ret < 0)
1308  return ret;
1309  pkt->dts = dts;
1310  pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
1311  pkt->stream_index = st->index;
1312  pkt->pos = pos;
1313  if (flv->new_extradata[stream_type]) {
1315  flv->new_extradata[stream_type],
1316  flv->new_extradata_size[stream_type]);
1317  if (ret >= 0) {
1318  flv->new_extradata[stream_type] = NULL;
1319  flv->new_extradata_size[stream_type] = 0;
1320  }
1321  }
1322  if (stream_type == FLV_STREAM_TYPE_AUDIO &&
1323  (sample_rate != flv->last_sample_rate ||
1324  channels != flv->last_channels)) {
1326  flv->last_channels = channels;
1327  ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
1328  }
1329 
1330  if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
1331  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
1332  stream_type == FLV_STREAM_TYPE_SUBTITLE ||
1333  stream_type == FLV_STREAM_TYPE_DATA)
1334  pkt->flags |= AV_PKT_FLAG_KEY;
1335 
1336 leave:
1337  last = avio_rb32(s->pb);
1338  if (!flv->trust_datasize) {
1339  if (last != orig_size + 11 && last != orig_size + 10 &&
1340  !avio_feof(s->pb) &&
1341  (last != orig_size || !last) && last != flv->sum_flv_tag_size &&
1342  !flv->broken_sizes) {
1343  av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %"PRId64"\n", last, orig_size + 11, flv->sum_flv_tag_size);
1344  avio_seek(s->pb, pos + 1, SEEK_SET);
1345  ret = resync(s);
1346  av_packet_unref(pkt);
1347  if (ret >= 0) {
1348  goto retry;
1349  }
1350  }
1351  }
1352 
1353  if (ret >= 0)
1354  flv->last_ts = pkt->dts;
1355 
1356  return ret;
1357 }
1358 
1359 static int flv_read_seek(AVFormatContext *s, int stream_index,
1360  int64_t ts, int flags)
1361 {
1362  FLVContext *flv = s->priv_data;
1363  flv->validate_count = 0;
1364  return avio_seek_time(s->pb, stream_index, ts, flags);
1365 }
1366 
1367 #define OFFSET(x) offsetof(FLVContext, x)
1368 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
1369 static const AVOption options[] = {
1370  { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1371  { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1372  { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
1373  { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
1374  { NULL }
1375 };
1376 
1377 static const AVClass flv_class = {
1378  .class_name = "flvdec",
1379  .item_name = av_default_item_name,
1380  .option = options,
1381  .version = LIBAVUTIL_VERSION_INT,
1382 };
1383 
1385  .name = "flv",
1386  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1387  .priv_data_size = sizeof(FLVContext),
1388  .read_probe = flv_probe,
1393  .extensions = "flv",
1394  .priv_class = &flv_class,
1395 };
1396 
1397 static const AVClass live_flv_class = {
1398  .class_name = "live_flvdec",
1399  .item_name = av_default_item_name,
1400  .option = options,
1401  .version = LIBAVUTIL_VERSION_INT,
1402 };
1403 
1405  .name = "live_flv",
1406  .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"),
1407  .priv_data_size = sizeof(FLVContext),
1413  .extensions = "flv",
1414  .priv_class = &live_flv_class,
1416 };
1417 
1418 static const AVClass kux_class = {
1419  .class_name = "kuxdec",
1420  .item_name = av_default_item_name,
1421  .option = options,
1422  .version = LIBAVUTIL_VERSION_INT,
1423 };
1424 
1426  .name = "kux",
1427  .long_name = NULL_IF_CONFIG_SMALL("KUX (YouKu)"),
1428  .priv_data_size = sizeof(FLVContext),
1429  .read_probe = kux_probe,
1434  .extensions = "kux",
1435  .priv_class = &kux_class,
1436 };
key frame (for AVC, a seekable frame)
Definition: flv.h:116
int missing_streams
Definition: flvdec.c:75
#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:706
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:2052
#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:844
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:4948
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:705
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:243
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:909
int searched_for_end
Definition: flvdec.c:62
int trust_datasize
trust data size of FLVTag
Definition: flvdec.c:49
#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:1018
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:1367
static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t ts, int flags)
Definition: flvdec.c:1359
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int64_t * keyframe_times
Definition: flvdec.c:73
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:1425
#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:78
#define TYPE_ONTEXTDATA
Definition: flvdec.c:704
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:60
#define VD
Definition: flvdec.c:1368
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:58
#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:51
#define AV_RB32
Definition: intreadwrite.h:130
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
static const AVOption options[]
Definition: flvdec.c:1369
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
#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:307
AMFDataType
Definition: flv.h:123
static int amf_skip_tag(AVIOContext *pb, AMFDataType type, int depth)
Definition: flvdec.c:860
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:48
int validate_count
Definition: flvdec.c:61
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:77
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:2104
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
Definition: flvdec.c:405
#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:131
#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:707
#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:805
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
static int flv_read_header(AVFormatContext *s)
Definition: flvdec.c:767
int64_t video_bit_rate
Definition: flvdec.c:71
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:5080
static const AVClass kux_class
Definition: flvdec.c:1418
static AVStream * create_stream(AVFormatContext *s, int codec_type)
Definition: flvdec.c:162
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int64_t * keyframe_filepositions
Definition: flvdec.c:74
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
static int live_flv_probe(const AVProbeData *p)
Definition: flvdec.c:112
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:52
int broken_sizes
Definition: flvdec.c:66
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:64
static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read)
Definition: flvdec.c:328
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:57
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:69
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
int64_t time_pos
Definition: flvdec.c:79
#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:3328
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:50
#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:72
static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
Definition: flvdec.c:192
int new_extradata_size[FLV_STREAM_TYPE_NB]
Definition: flvdec.c:53
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:1377
#define MAX_DEPTH
arbitrary limit to prevent unbounded recursion
Definition: flvdec.c:44
#define KEYFRAMES_TAG
Definition: flv.h:49
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
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:1397
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
static int flv_read_metabody(AVFormatContext *s, int64_t next_pos)
Definition: flvdec.c:709
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:76
static int resync(AVFormatContext *s)
Definition: flvdec.c:976
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:54
int nb_index_entries
Definition: avformat.h:1107
static int probe(const AVProbeData *p, int live)
Definition: flvdec.c:88
Describe the class of an AVClass context structure.
Definition: log.h:67
static int kux_probe(const AVProbeData *p)
Definition: flvdec.c:117
int64_t sum_flv_tag_size
Definition: flvdec.c:67
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define isnan(x)
Definition: libm.h:340
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:70
int last_channels
Definition: flvdec.c:55
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:828
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:85
static int flv_probe(const AVProbeData *p)
Definition: flvdec.c:107
#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:2094
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:3346
static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize)
Definition: flvdec.c:385
#define localtime_r
Definition: time_internal.h:46
AVInputFormat ff_live_flv_demuxer
Definition: flvdec.c:1404
int flags
Definition: flvenc.c:120
AVInputFormat ff_flv_demuxer
Definition: flvdec.c:1384
#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
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:499
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:84
#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:816
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:303
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define av_unused
Definition: attributes.h:131