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flvenc.c
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1 /*
2  * FLV muxer
3  * Copyright (c) 2003 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/intfloat.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/mathematics.h"
27 #include "avio_internal.h"
28 #include "avio.h"
29 #include "avc.h"
30 #include "avformat.h"
31 #include "flv.h"
32 #include "internal.h"
33 #include "metadata.h"
34 #include "libavutil/opt.h"
35 #include "libavcodec/put_bits.h"
36 #include "libavcodec/aacenctab.h"
37 
38 
39 static const AVCodecTag flv_video_codec_ids[] = {
40  { AV_CODEC_ID_FLV1, FLV_CODECID_H263 },
41  { AV_CODEC_ID_H263, FLV_CODECID_REALH263 },
42  { AV_CODEC_ID_MPEG4, FLV_CODECID_MPEG4 },
43  { AV_CODEC_ID_FLASHSV, FLV_CODECID_SCREEN },
44  { AV_CODEC_ID_FLASHSV2, FLV_CODECID_SCREEN2 },
45  { AV_CODEC_ID_VP6F, FLV_CODECID_VP6 },
46  { AV_CODEC_ID_VP6, FLV_CODECID_VP6 },
47  { AV_CODEC_ID_VP6A, FLV_CODECID_VP6A },
48  { AV_CODEC_ID_H264, FLV_CODECID_H264 },
49  { AV_CODEC_ID_NONE, 0 }
50 };
51 
52 static const AVCodecTag flv_audio_codec_ids[] = {
53  { AV_CODEC_ID_MP3, FLV_CODECID_MP3 >> FLV_AUDIO_CODECID_OFFSET },
54  { AV_CODEC_ID_PCM_U8, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
55  { AV_CODEC_ID_PCM_S16BE, FLV_CODECID_PCM >> FLV_AUDIO_CODECID_OFFSET },
56  { AV_CODEC_ID_PCM_S16LE, FLV_CODECID_PCM_LE >> FLV_AUDIO_CODECID_OFFSET },
57  { AV_CODEC_ID_ADPCM_SWF, FLV_CODECID_ADPCM >> FLV_AUDIO_CODECID_OFFSET },
58  { AV_CODEC_ID_AAC, FLV_CODECID_AAC >> FLV_AUDIO_CODECID_OFFSET },
59  { AV_CODEC_ID_NELLYMOSER, FLV_CODECID_NELLYMOSER >> FLV_AUDIO_CODECID_OFFSET },
60  { AV_CODEC_ID_PCM_MULAW, FLV_CODECID_PCM_MULAW >> FLV_AUDIO_CODECID_OFFSET },
61  { AV_CODEC_ID_PCM_ALAW, FLV_CODECID_PCM_ALAW >> FLV_AUDIO_CODECID_OFFSET },
62  { AV_CODEC_ID_SPEEX, FLV_CODECID_SPEEX >> FLV_AUDIO_CODECID_OFFSET },
63  { AV_CODEC_ID_NONE, 0 }
64 };
65 
66 typedef enum {
67  FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
68  FLV_NO_SEQUENCE_END = (1 << 1),
69  FLV_ADD_KEYFRAME_INDEX = (1 << 2),
70  FLV_NO_METADATA = (1 << 3),
71  FLV_NO_DURATION_FILESIZE = (1 << 4),
72 } FLVFlags;
73 
74 typedef struct FLVFileposition {
75  int64_t keyframe_position;
76  double keyframe_timestamp;
77  struct FLVFileposition *next;
78 } FLVFileposition;
79 
80 typedef struct FLVContext {
81  AVClass *av_class;
82  int reserved;
83  int64_t duration_offset;
84  int64_t filesize_offset;
85  int64_t duration;
86  int64_t delay; ///< first dts delay (needed for AVC & Speex)
87 
88  int64_t datastart_offset;
89  int64_t datasize_offset;
90  int64_t datasize;
91  int64_t videosize_offset;
92  int64_t videosize;
93  int64_t audiosize_offset;
94  int64_t audiosize;
95 
96  int64_t metadata_size_pos;
97  int64_t metadata_totalsize_pos;
98  int64_t metadata_totalsize;
99  int64_t keyframe_index_size;
100 
101  int64_t lasttimestamp_offset;
102  double lasttimestamp;
103  int64_t lastkeyframetimestamp_offset;
104  double lastkeyframetimestamp;
105  int64_t lastkeyframelocation_offset;
106  int64_t lastkeyframelocation;
107 
108  int acurframeindex;
109  int64_t keyframes_info_offset;
110 
111  int64_t filepositions_count;
112  FLVFileposition *filepositions;
113  FLVFileposition *head_filepositions;
114 
115  AVCodecParameters *audio_par;
116  AVCodecParameters *video_par;
117  double framerate;
118  AVCodecParameters *data_par;
119 
120  int flags;
121 } FLVContext;
122 
123 typedef struct FLVStreamContext {
124  int64_t last_ts; ///< last timestamp for each stream
125 } FLVStreamContext;
126 
127 static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
128 {
129  int flags = (par->bits_per_coded_sample == 16) ? FLV_SAMPLESSIZE_16BIT
130  : FLV_SAMPLESSIZE_8BIT;
131 
132  if (par->codec_id == AV_CODEC_ID_AAC) // specs force these parameters
133  return FLV_CODECID_AAC | FLV_SAMPLERATE_44100HZ |
134  FLV_SAMPLESSIZE_16BIT | FLV_STEREO;
135  else if (par->codec_id == AV_CODEC_ID_SPEEX) {
136  if (par->sample_rate != 16000) {
137  av_log(s, AV_LOG_ERROR,
138  "FLV only supports wideband (16kHz) Speex audio\n");
139  return AVERROR(EINVAL);
140  }
141  if (par->channels != 1) {
142  av_log(s, AV_LOG_ERROR, "FLV only supports mono Speex audio\n");
143  return AVERROR(EINVAL);
144  }
145  return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
146  } else {
147  switch (par->sample_rate) {
148  case 48000:
149  // 48khz mp3 is stored with 44k1 samplerate identifer
150  if (par->codec_id == AV_CODEC_ID_MP3) {
151  flags |= FLV_SAMPLERATE_44100HZ;
152  break;
153  } else {
154  goto error;
155  }
156  case 44100:
157  flags |= FLV_SAMPLERATE_44100HZ;
158  break;
159  case 22050:
160  flags |= FLV_SAMPLERATE_22050HZ;
161  break;
162  case 11025:
163  flags |= FLV_SAMPLERATE_11025HZ;
164  break;
165  case 16000: // nellymoser only
166  case 8000: // nellymoser only
167  case 5512: // not MP3
168  if (par->codec_id != AV_CODEC_ID_MP3) {
169  flags |= FLV_SAMPLERATE_SPECIAL;
170  break;
171  }
172  default:
173 error:
174  av_log(s, AV_LOG_ERROR,
175  "FLV does not support sample rate %d, "
176  "choose from (44100, 22050, 11025)\n", par->sample_rate);
177  return AVERROR(EINVAL);
178  }
179  }
180 
181  if (par->channels > 1)
182  flags |= FLV_STEREO;
183 
184  switch (par->codec_id) {
185  case AV_CODEC_ID_MP3:
186  flags |= FLV_CODECID_MP3 | FLV_SAMPLESSIZE_16BIT;
187  break;
188  case AV_CODEC_ID_PCM_U8:
189  flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_8BIT;
190  break;
191  case AV_CODEC_ID_PCM_S16BE:
192  flags |= FLV_CODECID_PCM | FLV_SAMPLESSIZE_16BIT;
193  break;
194  case AV_CODEC_ID_PCM_S16LE:
195  flags |= FLV_CODECID_PCM_LE | FLV_SAMPLESSIZE_16BIT;
196  break;
197  case AV_CODEC_ID_ADPCM_SWF:
198  flags |= FLV_CODECID_ADPCM | FLV_SAMPLESSIZE_16BIT;
199  break;
200  case AV_CODEC_ID_NELLYMOSER:
201  if (par->sample_rate == 8000)
202  flags |= FLV_CODECID_NELLYMOSER_8KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
203  else if (par->sample_rate == 16000)
204  flags |= FLV_CODECID_NELLYMOSER_16KHZ_MONO | FLV_SAMPLESSIZE_16BIT;
205  else
206  flags |= FLV_CODECID_NELLYMOSER | FLV_SAMPLESSIZE_16BIT;
207  break;
208  case AV_CODEC_ID_PCM_MULAW:
209  flags = FLV_CODECID_PCM_MULAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
210  break;
211  case AV_CODEC_ID_PCM_ALAW:
212  flags = FLV_CODECID_PCM_ALAW | FLV_SAMPLERATE_SPECIAL | FLV_SAMPLESSIZE_16BIT;
213  break;
214  case 0:
215  flags |= par->codec_tag << 4;
216  break;
217  default:
218  av_log(s, AV_LOG_ERROR, "Audio codec '%s' not compatible with FLV\n",
219  avcodec_get_name(par->codec_id));
220  return AVERROR(EINVAL);
221  }
222 
223  return flags;
224 }
225 
226 static void put_amf_string(AVIOContext *pb, const char *str)
227 {
228  size_t len = strlen(str);
229  avio_wb16(pb, len);
230  avio_write(pb, str, len);
231 }
232 
233 static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
234 {
235  avio_w8(pb, FLV_TAG_TYPE_VIDEO);
236  avio_wb24(pb, 5); /* Tag Data Size */
237  avio_wb24(pb, ts); /* lower 24 bits of timestamp in ms */
238  avio_w8(pb, (ts >> 24) & 0x7F); /* MSB of ts in ms */
239  avio_wb24(pb, 0); /* StreamId = 0 */
240  avio_w8(pb, 23); /* ub[4] FrameType = 1, ub[4] CodecId = 7 */
241  avio_w8(pb, 2); /* AVC end of sequence */
242  avio_wb24(pb, 0); /* Always 0 for AVC EOS. */
243  avio_wb32(pb, 16); /* Size of FLV tag */
244 }
245 
246 static void put_amf_double(AVIOContext *pb, double d)
247 {
248  avio_w8(pb, AMF_DATA_TYPE_NUMBER);
249  avio_wb64(pb, av_double2int(d));
250 }
251 
252 static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
253 {
254  avio_w8(pb, abyte);
255 }
256 
257 static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
258 {
259  avio_w8(pb, AMF_DATA_TYPE_ARRAY);
260  avio_wb32(pb, dw);
261 }
262 
263 static void put_amf_bool(AVIOContext *pb, int b)
264 {
265  avio_w8(pb, AMF_DATA_TYPE_BOOL);
266  avio_w8(pb, !!b);
267 }
268 
269 static void write_metadata(AVFormatContext *s, unsigned int ts)
270 {
271  AVIOContext *pb = s->pb;
272  FLVContext *flv = s->priv_data;
273  int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);
274  int metadata_count = 0;
275  int64_t metadata_count_pos;
276  AVDictionaryEntry *tag = NULL;
277 
278  /* write meta_tag */
279  avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
280  flv->metadata_size_pos = avio_tell(pb);
281  avio_wb24(pb, 0); // size of data part (sum of all parts below)
282  avio_wb24(pb, ts); // timestamp
283  avio_wb32(pb, 0); // reserved
284 
285  /* now data of data_size size */
286 
287  /* first event name as a string */
288  avio_w8(pb, AMF_DATA_TYPE_STRING);
289  put_amf_string(pb, "onMetaData"); // 12 bytes
290 
291  /* mixed array (hash) with size and string/type/data tuples */
292  avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
293  metadata_count_pos = avio_tell(pb);
294  metadata_count = 4 * !!flv->video_par +
295  5 * !!flv->audio_par +
296  1 * !!flv->data_par;
297  if (write_duration_filesize) {
298  metadata_count += 2; // +2 for duration and file size
299  }
300  avio_wb32(pb, metadata_count);
301 
302  if (write_duration_filesize) {
303  put_amf_string(pb, "duration");
304  flv->duration_offset = avio_tell(pb);
305  // fill in the guessed duration, it'll be corrected later if incorrect
306  put_amf_double(pb, s->duration / AV_TIME_BASE);
307  }
308 
309  if (flv->video_par) {
310  put_amf_string(pb, "width");
311  put_amf_double(pb, flv->video_par->width);
312 
313  put_amf_string(pb, "height");
314  put_amf_double(pb, flv->video_par->height);
315 
316  put_amf_string(pb, "videodatarate");
317  put_amf_double(pb, flv->video_par->bit_rate / 1024.0);
318 
319  if (flv->framerate != 0.0) {
320  put_amf_string(pb, "framerate");
321  put_amf_double(pb, flv->framerate);
322  metadata_count++;
323  }
324 
325  put_amf_string(pb, "videocodecid");
326  put_amf_double(pb, flv->video_par->codec_tag);
327  }
328 
329  if (flv->audio_par) {
330  put_amf_string(pb, "audiodatarate");
331  put_amf_double(pb, flv->audio_par->bit_rate / 1024.0);
332 
333  put_amf_string(pb, "audiosamplerate");
334  put_amf_double(pb, flv->audio_par->sample_rate);
335 
336  put_amf_string(pb, "audiosamplesize");
337  put_amf_double(pb, flv->audio_par->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
338 
339  put_amf_string(pb, "stereo");
340  put_amf_bool(pb, flv->audio_par->channels == 2);
341 
342  put_amf_string(pb, "audiocodecid");
343  put_amf_double(pb, flv->audio_par->codec_tag);
344  }
345 
346  if (flv->data_par) {
347  put_amf_string(pb, "datastream");
348  put_amf_double(pb, 0.0);
349  }
350 
351  ff_standardize_creation_time(s);
352  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
353  if( !strcmp(tag->key, "width")
354  ||!strcmp(tag->key, "height")
355  ||!strcmp(tag->key, "videodatarate")
356  ||!strcmp(tag->key, "framerate")
357  ||!strcmp(tag->key, "videocodecid")
358  ||!strcmp(tag->key, "audiodatarate")
359  ||!strcmp(tag->key, "audiosamplerate")
360  ||!strcmp(tag->key, "audiosamplesize")
361  ||!strcmp(tag->key, "stereo")
362  ||!strcmp(tag->key, "audiocodecid")
363  ||!strcmp(tag->key, "duration")
364  ||!strcmp(tag->key, "onMetaData")
365  ||!strcmp(tag->key, "datasize")
366  ||!strcmp(tag->key, "lasttimestamp")
367  ||!strcmp(tag->key, "totalframes")
368  ||!strcmp(tag->key, "hasAudio")
369  ||!strcmp(tag->key, "hasVideo")
370  ||!strcmp(tag->key, "hasCuePoints")
371  ||!strcmp(tag->key, "hasMetadata")
372  ||!strcmp(tag->key, "hasKeyframes")
373  ){
374  av_log(s, AV_LOG_DEBUG, "Ignoring metadata for %s\n", tag->key);
375  continue;
376  }
377  put_amf_string(pb, tag->key);
378  avio_w8(pb, AMF_DATA_TYPE_STRING);
379  put_amf_string(pb, tag->value);
380  metadata_count++;
381  }
382 
383  if (write_duration_filesize) {
384  put_amf_string(pb, "filesize");
385  flv->filesize_offset = avio_tell(pb);
386  put_amf_double(pb, 0); // delayed write
387  }
388 
389  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
390  flv->acurframeindex = 0;
391  flv->keyframe_index_size = 0;
392 
393  put_amf_string(pb, "hasVideo");
394  put_amf_bool(pb, !!flv->video_par);
395  metadata_count++;
396 
397  put_amf_string(pb, "hasKeyframes");
398  put_amf_bool(pb, 1);
399  metadata_count++;
400 
401  put_amf_string(pb, "hasAudio");
402  put_amf_bool(pb, !!flv->audio_par);
403  metadata_count++;
404 
405  put_amf_string(pb, "hasMetadata");
406  put_amf_bool(pb, 1);
407  metadata_count++;
408 
409  put_amf_string(pb, "canSeekToEnd");
410  put_amf_bool(pb, 1);
411  metadata_count++;
412 
413  put_amf_string(pb, "datasize");
414  flv->datasize_offset = avio_tell(pb);
415  flv->datasize = 0;
416  put_amf_double(pb, flv->datasize);
417  metadata_count++;
418 
419  put_amf_string(pb, "videosize");
420  flv->videosize_offset = avio_tell(pb);
421  flv->videosize = 0;
422  put_amf_double(pb, flv->videosize);
423  metadata_count++;
424 
425  put_amf_string(pb, "audiosize");
426  flv->audiosize_offset = avio_tell(pb);
427  flv->audiosize = 0;
428  put_amf_double(pb, flv->audiosize);
429  metadata_count++;
430 
431  put_amf_string(pb, "lasttimestamp");
432  flv->lasttimestamp_offset = avio_tell(pb);
433  flv->lasttimestamp = 0;
434  put_amf_double(pb, 0);
435  metadata_count++;
436 
437  put_amf_string(pb, "lastkeyframetimestamp");
438  flv->lastkeyframetimestamp_offset = avio_tell(pb);
439  flv->lastkeyframetimestamp = 0;
440  put_amf_double(pb, 0);
441  metadata_count++;
442 
443  put_amf_string(pb, "lastkeyframelocation");
444  flv->lastkeyframelocation_offset = avio_tell(pb);
445  flv->lastkeyframelocation = 0;
446  put_amf_double(pb, 0);
447  metadata_count++;
448 
449  put_amf_string(pb, "keyframes");
450  put_amf_byte(pb, AMF_DATA_TYPE_OBJECT);
451  metadata_count++;
452 
453  flv->keyframes_info_offset = avio_tell(pb);
454  }
455 
456  put_amf_string(pb, "");
457  avio_w8(pb, AMF_END_OF_OBJECT);
458 
459  /* write total size of tag */
460  flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
461 
462  avio_seek(pb, metadata_count_pos, SEEK_SET);
463  avio_wb32(pb, metadata_count);
464 
465  avio_seek(pb, flv->metadata_size_pos, SEEK_SET);
466  avio_wb24(pb, flv->metadata_totalsize);
467  avio_skip(pb, flv->metadata_totalsize + 10 - 3);
468  flv->metadata_totalsize_pos = avio_tell(pb);
469  avio_wb32(pb, flv->metadata_totalsize + 11);
470 }
471 
472 static int unsupported_codec(AVFormatContext *s,
473  const char* type, int codec_id)
474 {
475  const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);
476  av_log(s, AV_LOG_ERROR,
477  "%s codec %s not compatible with flv\n",
478  type,
479  desc ? desc->name : "unknown");
480  return AVERROR(ENOSYS);
481 }
482 
483 static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par) {
484  int64_t data_size;
485  AVIOContext *pb = s->pb;
486  FLVContext *flv = s->priv_data;
487 
488  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
489  || par->codec_id == AV_CODEC_ID_MPEG4) {
490  int64_t pos;
491  avio_w8(pb,
492  par->codec_type == AVMEDIA_TYPE_VIDEO ?
493  FLV_TAG_TYPE_VIDEO : FLV_TAG_TYPE_AUDIO);
494  avio_wb24(pb, 0); // size patched later
495  avio_wb24(pb, 0); // ts
496  avio_w8(pb, 0); // ts ext
497  avio_wb24(pb, 0); // streamid
498  pos = avio_tell(pb);
499  if (par->codec_id == AV_CODEC_ID_AAC) {
500  avio_w8(pb, get_audio_flags(s, par));
501  avio_w8(pb, 0); // AAC sequence header
502 
503  if (!par->extradata_size && (flv->flags & FLV_AAC_SEQ_HEADER_DETECT)) {
504  PutBitContext pbc;
505  int samplerate_index;
506  int channels = flv->audio_par->channels
507  - (flv->audio_par->channels == 8 ? 1 : 0);
508  uint8_t data[2];
509 
510  for (samplerate_index = 0; samplerate_index < 16;
511  samplerate_index++)
512  if (flv->audio_par->sample_rate
513  == mpeg4audio_sample_rates[samplerate_index])
514  break;
515 
516  init_put_bits(&pbc, data, sizeof(data));
517  put_bits(&pbc, 5, flv->audio_par->profile + 1); //profile
518  put_bits(&pbc, 4, samplerate_index); //sample rate index
519  put_bits(&pbc, 4, channels);
520  put_bits(&pbc, 1, 0); //frame length - 1024 samples
521  put_bits(&pbc, 1, 0); //does not depend on core coder
522  put_bits(&pbc, 1, 0); //is not extension
523  flush_put_bits(&pbc);
524 
525  avio_w8(pb, data[0]);
526  avio_w8(pb, data[1]);
527 
528  av_log(s, AV_LOG_WARNING, "AAC sequence header: %02x %02x.\n",
529  data[0], data[1]);
530  }
531  avio_write(pb, par->extradata, par->extradata_size);
532  } else {
533  avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
534  avio_w8(pb, 0); // AVC sequence header
535  avio_wb24(pb, 0); // composition time
536  ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
537  }
538  data_size = avio_tell(pb) - pos;
539  avio_seek(pb, -data_size - 10, SEEK_CUR);
540  avio_wb24(pb, data_size);
541  avio_skip(pb, data_size + 10 - 3);
542  avio_wb32(pb, data_size + 11); // previous tag size
543  }
544 }
545 
546 static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
547 {
548  FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
549 
550  if (!position) {
551  av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
552  return AVERROR(ENOMEM);
553  }
554 
555  position->keyframe_timestamp = ts;
556  position->keyframe_position = pos;
557 
558  if (!flv->filepositions_count) {
559  flv->filepositions = position;
560  flv->head_filepositions = flv->filepositions;
561  position->next = NULL;
562  } else {
563  flv->filepositions->next = position;
564  position->next = NULL;
565  flv->filepositions = flv->filepositions->next;
566  }
567 
568  flv->filepositions_count++;
569 
570  return 0;
571 }
572 
573 static int shift_data(AVFormatContext *s)
574 {
575  int ret = 0;
576  int n = 0;
577  int64_t metadata_size = 0;
578  FLVContext *flv = s->priv_data;
579  int64_t pos, pos_end = avio_tell(s->pb);
580  uint8_t *buf, *read_buf[2];
581  int read_buf_id = 0;
582  int read_size[2];
583  AVIOContext *read_pb;
584 
585  metadata_size = flv->filepositions_count * 9 * 2 + 10; /* filepositions and times value */
586  metadata_size += 2 + 13; /* filepositions String */
587  metadata_size += 2 + 5; /* times String */
588  metadata_size += 3; /* Object end */
589 
590  flv->keyframe_index_size = metadata_size;
591 
592  if (metadata_size < 0)
593  return metadata_size;
594 
595  buf = av_malloc_array(metadata_size, 2);
596  if (!buf) {
597  return AVERROR(ENOMEM);
598  }
599  read_buf[0] = buf;
600  read_buf[1] = buf + metadata_size;
601 
602  avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
603  avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
604 
605  avio_seek(s->pb, flv->metadata_totalsize_pos, SEEK_SET);
606  avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
607  avio_seek(s->pb, pos_end, SEEK_SET);
608 
609  /* Shift the data: the AVIO context of the output can only be used for
610  * writing, so we re-open the same output, but for reading. It also avoids
611  * a read/seek/write/seek back and forth. */
612  avio_flush(s->pb);
613  ret = s->io_open(s, &read_pb, s->url, AVIO_FLAG_READ, NULL);
614  if (ret < 0) {
615  av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
616  "the second pass (add_keyframe_index)\n", s->url);
617  goto end;
618  }
619 
620  /* mark the end of the shift to up to the last data we wrote, and get ready
621  * for writing */
622  pos_end = avio_tell(s->pb);
623  avio_seek(s->pb, flv->keyframes_info_offset + metadata_size, SEEK_SET);
624 
625  /* start reading at where the keyframe index information will be placed */
626  avio_seek(read_pb, flv->keyframes_info_offset, SEEK_SET);
627  pos = avio_tell(read_pb);
628 
629 #define READ_BLOCK do { \
630  read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
631  read_buf_id ^= 1; \
632 } while (0)
633 
634  /* shift data by chunk of at most keyframe *filepositions* and *times* size */
635  READ_BLOCK;
636  do {
637  READ_BLOCK;
638  n = read_size[read_buf_id];
639  if (n < 0)
640  break;
641  avio_write(s->pb, read_buf[read_buf_id], n);
642  pos += n;
643  } while (pos <= pos_end);
644 
645  ff_format_io_close(s, &read_pb);
646 
647 end:
648  av_free(buf);
649  return ret;
650 }
651 
652 
653 static int flv_write_header(AVFormatContext *s)
654 {
655  int i;
656  AVIOContext *pb = s->pb;
657  FLVContext *flv = s->priv_data;
658 
659  for (i = 0; i < s->nb_streams; i++) {
660  AVCodecParameters *par = s->streams[i]->codecpar;
661  FLVStreamContext *sc;
662  switch (par->codec_type) {
663  case AVMEDIA_TYPE_VIDEO:
664  if (s->streams[i]->avg_frame_rate.den &&
665  s->streams[i]->avg_frame_rate.num) {
666  flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
667  }
668  if (flv->video_par) {
669  av_log(s, AV_LOG_ERROR,
670  "at most one video stream is supported in flv\n");
671  return AVERROR(EINVAL);
672  }
673  flv->video_par = par;
674  if (!ff_codec_get_tag(flv_video_codec_ids, par->codec_id))
675  return unsupported_codec(s, "Video", par->codec_id);
676 
677  if (par->codec_id == AV_CODEC_ID_MPEG4 ||
678  par->codec_id == AV_CODEC_ID_H263) {
679  int error = s->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL;
680  av_log(s, error ? AV_LOG_ERROR : AV_LOG_WARNING,
681  "Codec %s is not supported in the official FLV specification,\n", avcodec_get_name(par->codec_id));
682 
683  if (error) {
684  av_log(s, AV_LOG_ERROR,
685  "use vstrict=-1 / -strict -1 to use it anyway.\n");
686  return AVERROR(EINVAL);
687  }
688  } else if (par->codec_id == AV_CODEC_ID_VP6) {
689  av_log(s, AV_LOG_WARNING,
690  "Muxing VP6 in flv will produce flipped video on playback.\n");
691  }
692  break;
693  case AVMEDIA_TYPE_AUDIO:
694  if (flv->audio_par) {
695  av_log(s, AV_LOG_ERROR,
696  "at most one audio stream is supported in flv\n");
697  return AVERROR(EINVAL);
698  }
699  flv->audio_par = par;
700  if (get_audio_flags(s, par) < 0)
701  return unsupported_codec(s, "Audio", par->codec_id);
702  if (par->codec_id == AV_CODEC_ID_PCM_S16BE)
703  av_log(s, AV_LOG_WARNING,
704  "16-bit big-endian audio in flv is valid but most likely unplayable (hardware dependent); use s16le\n");
705  break;
706  case AVMEDIA_TYPE_DATA:
707  if (par->codec_id != AV_CODEC_ID_TEXT && par->codec_id != AV_CODEC_ID_NONE)
708  return unsupported_codec(s, "Data", par->codec_id);
709  flv->data_par = par;
710  break;
711  case AVMEDIA_TYPE_SUBTITLE:
712  if (par->codec_id != AV_CODEC_ID_TEXT) {
713  av_log(s, AV_LOG_ERROR, "Subtitle codec '%s' for stream %d is not compatible with FLV\n",
714  avcodec_get_name(par->codec_id), i);
715  return AVERROR_INVALIDDATA;
716  }
717  flv->data_par = par;
718  break;
719  default:
720  av_log(s, AV_LOG_ERROR, "Codec type '%s' for stream %d is not compatible with FLV\n",
721  av_get_media_type_string(par->codec_type), i);
722  return AVERROR(EINVAL);
723  }
724  avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
725 
726  sc = av_mallocz(sizeof(FLVStreamContext));
727  if (!sc)
728  return AVERROR(ENOMEM);
729  s->streams[i]->priv_data = sc;
730  sc->last_ts = -1;
731  }
732 
733  flv->delay = AV_NOPTS_VALUE;
734 
735  avio_write(pb, "FLV", 3);
736  avio_w8(pb, 1);
737  avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_par +
738  FLV_HEADER_FLAG_HASVIDEO * !!flv->video_par);
739  avio_wb32(pb, 9);
740  avio_wb32(pb, 0);
741 
742  for (i = 0; i < s->nb_streams; i++)
743  if (s->streams[i]->codecpar->codec_tag == 5) {
744  avio_w8(pb, 8); // message type
745  avio_wb24(pb, 0); // include flags
746  avio_wb24(pb, 0); // time stamp
747  avio_wb32(pb, 0); // reserved
748  avio_wb32(pb, 11); // size
749  flv->reserved = 5;
750  }
751 
752  if (flv->flags & FLV_NO_METADATA) {
753  pb->seekable = 0;
754  } else {
755  write_metadata(s, 0);
756  }
757 
758  for (i = 0; i < s->nb_streams; i++) {
759  flv_write_codec_header(s, s->streams[i]->codecpar);
760  }
761 
762  flv->datastart_offset = avio_tell(pb);
763  return 0;
764 }
765 
766 static int flv_write_trailer(AVFormatContext *s)
767 {
768  int64_t file_size;
769  AVIOContext *pb = s->pb;
770  FLVContext *flv = s->priv_data;
771  int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
772  int i, res;
773  int64_t cur_pos = avio_tell(s->pb);
774 
775  if (build_keyframes_idx) {
776  FLVFileposition *newflv_posinfo, *p;
777 
778  avio_seek(pb, flv->videosize_offset, SEEK_SET);
779  put_amf_double(pb, flv->videosize);
780 
781  avio_seek(pb, flv->audiosize_offset, SEEK_SET);
782  put_amf_double(pb, flv->audiosize);
783 
784  avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
785  put_amf_double(pb, flv->lasttimestamp);
786 
787  avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
788  put_amf_double(pb, flv->lastkeyframetimestamp);
789 
790  avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
791  put_amf_double(pb, flv->lastkeyframelocation + flv->keyframe_index_size);
792  avio_seek(pb, cur_pos, SEEK_SET);
793 
794  res = shift_data(s);
795  if (res < 0) {
796  goto end;
797  }
798  avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
799  put_amf_string(pb, "filepositions");
800  put_amf_dword_array(pb, flv->filepositions_count);
801  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
802  put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
803  }
804 
805  put_amf_string(pb, "times");
806  put_amf_dword_array(pb, flv->filepositions_count);
807  for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
808  put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
809  }
810 
811  newflv_posinfo = flv->head_filepositions;
812  while (newflv_posinfo) {
813  p = newflv_posinfo->next;
814  if (p) {
815  newflv_posinfo->next = p->next;
816  av_free(p);
817  p = NULL;
818  } else {
819  av_free(newflv_posinfo);
820  newflv_posinfo = NULL;
821  }
822  }
823 
824  put_amf_string(pb, "");
825  avio_w8(pb, AMF_END_OF_OBJECT);
826 
827  avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
828  }
829 
830 end:
831  if (flv->flags & FLV_NO_SEQUENCE_END) {
832  av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
833  } else {
834  /* Add EOS tag */
835  for (i = 0; i < s->nb_streams; i++) {
836  AVCodecParameters *par = s->streams[i]->codecpar;
837  FLVStreamContext *sc = s->streams[i]->priv_data;
838  if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
839  (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
840  put_avc_eos_tag(pb, sc->last_ts);
841  }
842  }
843 
844  file_size = avio_tell(pb);
845 
846  if (build_keyframes_idx) {
847  flv->datasize = file_size - flv->datastart_offset;
848  avio_seek(pb, flv->datasize_offset, SEEK_SET);
849  put_amf_double(pb, flv->datasize);
850  }
851  if (!(flv->flags & FLV_NO_METADATA)) {
852  if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
853  /* update information */
854  if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
855  av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
856  } else {
857  put_amf_double(pb, flv->duration / (double)1000);
858  }
859  if (avio_seek(pb, flv->filesize_offset, SEEK_SET) < 0) {
860  av_log(s, AV_LOG_WARNING, "Failed to update header with correct filesize.\n");
861  } else {
862  put_amf_double(pb, file_size);
863  }
864  }
865  }
866 
867  return 0;
868 }
869 
870 static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
871 {
872  AVIOContext *pb = s->pb;
873  AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
874  FLVContext *flv = s->priv_data;
875  FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data;
876  unsigned ts;
877  int size = pkt->size;
878  uint8_t *data = NULL;
879  int flags = -1, flags_size, ret;
880  int64_t cur_offset = avio_tell(pb);
881 
882  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
883  par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
884  flags_size = 2;
885  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
886  flags_size = 5;
887  else
888  flags_size = 1;
889 
890  if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
891  || par->codec_id == AV_CODEC_ID_MPEG4) {
892  int side_size = 0;
893  uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
894  if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
895  av_free(par->extradata);
896  par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
897  if (!par->extradata) {
898  par->extradata_size = 0;
899  return AVERROR(ENOMEM);
900  }
901  memcpy(par->extradata, side, side_size);
902  par->extradata_size = side_size;
903  flv_write_codec_header(s, par);
904  }
905  }
906 
907  if (flv->delay == AV_NOPTS_VALUE)
908  flv->delay = -pkt->dts;
909 
910  if (pkt->dts < -flv->delay) {
911  av_log(s, AV_LOG_WARNING,
912  "Packets are not in the proper order with respect to DTS\n");
913  return AVERROR(EINVAL);
914  }
915 
916  ts = pkt->dts;
917 
918  if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) {
919  write_metadata(s, ts);
920  s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED;
921  }
922 
923  avio_write_marker(pb, av_rescale(ts, AV_TIME_BASE, 1000),
924  pkt->flags & AV_PKT_FLAG_KEY && (flv->video_par ? par->codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
925 
926  switch (par->codec_type) {
927  case AVMEDIA_TYPE_VIDEO:
928  avio_w8(pb, FLV_TAG_TYPE_VIDEO);
929 
930  flags = ff_codec_get_tag(flv_video_codec_ids, par->codec_id);
931 
932  flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER;
933  break;
934  case AVMEDIA_TYPE_AUDIO:
935  flags = get_audio_flags(s, par);
936 
937  av_assert0(size);
938 
939  avio_w8(pb, FLV_TAG_TYPE_AUDIO);
940  break;
941  case AVMEDIA_TYPE_SUBTITLE:
942  case AVMEDIA_TYPE_DATA:
943  avio_w8(pb, FLV_TAG_TYPE_META);
944  break;
945  default:
946  return AVERROR(EINVAL);
947  }
948 
949  if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
950  /* check if extradata looks like mp4 formatted */
951  if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
952  if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
953  return ret;
954  } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
955  (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
956  if (!s->streams[pkt->stream_index]->nb_frames) {
957  av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
958  "use the audio bitstream filter 'aac_adtstoasc' to fix it "
959  "('-bsf:a aac_adtstoasc' option with ffmpeg)\n");
960  return AVERROR_INVALIDDATA;
961  }
962  av_log(s, AV_LOG_WARNING, "aac bitstream error\n");
963  }
964 
965  /* check Speex packet duration */
966  if (par->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160)
967  av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than "
968  "8 frames per packet. Adobe Flash "
969  "Player cannot handle this!\n");
970 
971  if (sc->last_ts < ts)
972  sc->last_ts = ts;
973 
974  if (size + flags_size >= 1<<24) {
975  av_log(s, AV_LOG_ERROR, "Too large packet with size %u >= %u\n",
976  size + flags_size, 1<<24);
977  return AVERROR(EINVAL);
978  }
979 
980  avio_wb24(pb, size + flags_size);
981  avio_wb24(pb, ts & 0xFFFFFF);
982  avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_
983  avio_wb24(pb, flv->reserved);
984 
985  if (par->codec_type == AVMEDIA_TYPE_DATA ||
986  par->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
987  int data_size;
988  int64_t metadata_size_pos = avio_tell(pb);
989  if (par->codec_id == AV_CODEC_ID_TEXT) {
990  // legacy FFmpeg magic?
991  avio_w8(pb, AMF_DATA_TYPE_STRING);
992  put_amf_string(pb, "onTextData");
993  avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
994  avio_wb32(pb, 2);
995  put_amf_string(pb, "type");
996  avio_w8(pb, AMF_DATA_TYPE_STRING);
997  put_amf_string(pb, "Text");
998  put_amf_string(pb, "text");
999  avio_w8(pb, AMF_DATA_TYPE_STRING);
1000  put_amf_string(pb, pkt->data);
1001  put_amf_string(pb, "");
1002  avio_w8(pb, AMF_END_OF_OBJECT);
1003  } else {
1004  // just pass the metadata through
1005  avio_write(pb, data ? data : pkt->data, size);
1006  }
1007  /* write total size of tag */
1008  data_size = avio_tell(pb) - metadata_size_pos;
1009  avio_seek(pb, metadata_size_pos - 10, SEEK_SET);
1010  avio_wb24(pb, data_size);
1011  avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
1012  avio_wb32(pb, data_size + 11);
1013  } else {
1014  av_assert1(flags>=0);
1015  avio_w8(pb,flags);
1016  if (par->codec_id == AV_CODEC_ID_VP6)
1017  avio_w8(pb,0);
1018  if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A) {
1019  if (par->extradata_size)
1020  avio_w8(pb, par->extradata[0]);
1021  else
1022  avio_w8(pb, ((FFALIGN(par->width, 16) - par->width) << 4) |
1023  (FFALIGN(par->height, 16) - par->height));
1024  } else if (par->codec_id == AV_CODEC_ID_AAC)
1025  avio_w8(pb, 1); // AAC raw
1026  else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
1027  avio_w8(pb, 1); // AVC NALU
1028  avio_wb24(pb, pkt->pts - pkt->dts);
1029  }
1030 
1031  avio_write(pb, data ? data : pkt->data, size);
1032 
1033  avio_wb32(pb, size + flags_size + 11); // previous tag size
1034  flv->duration = FFMAX(flv->duration,
1035  pkt->pts + flv->delay + pkt->duration);
1036  }
1037 
1038  if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
1039  switch (par->codec_type) {
1040  case AVMEDIA_TYPE_VIDEO:
1041  flv->videosize += (avio_tell(pb) - cur_offset);
1042  flv->lasttimestamp = flv->acurframeindex / flv->framerate;
1043  if (pkt->flags & AV_PKT_FLAG_KEY) {
1044  double ts = flv->acurframeindex / flv->framerate;
1045  int64_t pos = cur_offset;
1046 
1047  flv->lastkeyframetimestamp = flv->acurframeindex / flv->framerate;
1048  flv->lastkeyframelocation = pos;
1049  flv_append_keyframe_info(s, flv, ts, pos);
1050  }
1051  flv->acurframeindex++;
1052  break;
1053 
1054  case AVMEDIA_TYPE_AUDIO:
1055  flv->audiosize += (avio_tell(pb) - cur_offset);
1056  break;
1057 
1058  default:
1059  av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
1060  break;
1061  }
1062  }
1063 
1064  av_free(data);
1065 
1066  return pb->error;
1067 }
1068 
1069 static const AVOption options[] = {
1070  { "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1071  { "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1072  { "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1073  { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1074  { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1075  { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
1076  { NULL },
1077 };
1078 
1079 static const AVClass flv_muxer_class = {
1080  .class_name = "flv muxer",
1081  .item_name = av_default_item_name,
1082  .option = options,
1083  .version = LIBAVUTIL_VERSION_INT,
1084 };
1085 
1086 AVOutputFormat ff_flv_muxer = {
1087  .name = "flv",
1088  .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"),
1089  .mime_type = "video/x-flv",
1090  .extensions = "flv",
1091  .priv_data_size = sizeof(FLVContext),
1092  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_ADPCM_SWF,
1093  .video_codec = AV_CODEC_ID_FLV1,
1094  .write_header = flv_write_header,
1095  .write_packet = flv_write_packet,
1096  .write_trailer = flv_write_trailer,
1097  .codec_tag = (const AVCodecTag* const []) {
1098  flv_video_codec_ids, flv_audio_codec_ids, 0
1099  },
1100  .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1101  AVFMT_TS_NONSTRICT,
1102  .priv_class = &flv_muxer_class,
1103 };
put_amf_dword_array
static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
Definition: flvenc.c:257
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
avio_wb64
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:463
NULL
#define NULL
Definition: coverity.c:32
flv_audio_codec_ids
static const AVCodecTag flv_audio_codec_ids[]
Definition: flvenc.c:52
FLVContext::acurframeindex
int acurframeindex
Definition: flvenc.c:108
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AV_CODEC_ID_NONE
Definition: avcodec.h:216
avio.h
Buffered I/O operations.
AVSTREAM_EVENT_FLAG_METADATA_UPDATED
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:988
ff_flv_muxer
AVOutputFormat ff_flv_muxer
Definition: flvenc.c:1086
AVOption
AVOption.
Definition: opt.h:246
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
FLVContext::framerate
double framerate
Definition: flvenc.c:117
FLVContext::datastart_offset
int64_t datastart_offset
Definition: flvenc.c:88
FLVContext::audiosize_offset
int64_t audiosize_offset
Definition: flvenc.c:93
flv_write_codec_header
static void flv_write_codec_header(AVFormatContext *s, AVCodecParameters *par)
Definition: flvenc.c:483
FLVContext::delay
int64_t delay
first dts delay (needed for AVC & Speex)
Definition: flvenc.c:86
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:207
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
avpriv_set_pts_info
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:4827
desc
const char * desc
Definition: nvenc.c:65
FLVContext::duration
int64_t duration
Definition: flvenc.c:85
channels
channels
Definition: aptx.c:30
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVPacket::size
int size
Definition: avcodec.h:1431
b
const char * b
Definition: vf_curves.c:113
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVIO_FLAG_READ
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
unsupported_codec
static int unsupported_codec(AVFormatContext *s, const char *type, int codec_id)
Definition: flvenc.c:472
av_double2int
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
flv_muxer_class
static const AVClass flv_muxer_class
Definition: flvenc.c:1079
READ_BLOCK
#define READ_BLOCK
AVFormatContext::event_flags
int event_flags
Flags for the user to detect events happening on the file.
Definition: avformat.h:1664
FLVContext::metadata_totalsize
int64_t metadata_totalsize
Definition: flvenc.c:98
AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
AVStream::priv_data
void * priv_data
Definition: avformat.h:889
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3113
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
FLVContext::lastkeyframetimestamp
double lastkeyframetimestamp
Definition: flvenc.c:104
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AV_CODEC_ID_FLASHSV2
Definition: avcodec.h:349
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
AV_CODEC_ID_H264
Definition: avcodec.h:245
get_audio_flags
static int get_audio_flags(AVFormatContext *s, AVCodecParameters *par)
Definition: flvenc.c:127
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1657
AVFMT_TS_NONSTRICT
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:479
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
FLVContext::keyframe_index_size
int64_t keyframe_index_size
Definition: flvenc.c:99
AV_CODEC_ID_VP6
Definition: avcodec.h:309
AV_CODEC_ID_SPEEX
Definition: avcodec.h:586
flv_video_codec_ids
static const AVCodecTag flv_video_codec_ids[]
Definition: flvenc.c:39
options
static const AVOption options[]
Definition: flvenc.c:1069
AVFormatContext
Format I/O context.
Definition: avformat.h:1351
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
metadata.h
internal metadata API header see avformat.h or the public API!
dict.h
Public dictionary API.
AV_OPT_TYPE_CONST
Definition: opt.h:232
FLVContext::head_filepositions
FLVFileposition * head_filepositions
Definition: flvenc.c:113
uint8_t
uint8_t
Definition: audio_convert.c:194
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:3950
FLVContext::video_par
AVCodecParameters * video_par
Definition: flvenc.c:116
opt.h
AVOptions.
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1448
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5615
AV_CODEC_ID_AAC
Definition: avcodec.h:553
FLVFileposition::keyframe_timestamp
double keyframe_timestamp
Definition: flvenc.c:76
avio_write_marker
void avio_write_marker(AVIOContext *s, int64_t time, enum AVIODataMarkerType type)
Mark the written bytestream as a specific type.
Definition: aviobuf.c:493
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
AVIO_DATA_MARKER_BOUNDARY_POINT
A point in the output bytestream where a demuxer can start parsing (for non self synchronizing bytest...
Definition: avio.h:128
avio_internal.h
AV_CODEC_ID_FLV1
Definition: avcodec.h:239
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
tag
uint32_t tag
Definition: movenc.c:1455
FLVContext::audio_par
AVCodecParameters * audio_par
Definition: flvenc.c:115
FLVContext::keyframes_info_offset
int64_t keyframes_info_offset
Definition: flvenc.c:109
FLVContext::metadata_totalsize_pos
int64_t metadata_totalsize_pos
Definition: flvenc.c:97
size
ptrdiff_t size
Definition: opengl_enc.c:101
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
flags
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
FLVContext::lastkeyframelocation_offset
int64_t lastkeyframelocation_offset
Definition: flvenc.c:105
FLVContext::datasize_offset
int64_t datasize_offset
Definition: flvenc.c:89
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
AV_CODEC_ID_FLASHSV
Definition: avcodec.h:304
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
AV_CODEC_ID_VP6A
Definition: avcodec.h:324
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3913
FF_COMPLIANCE_UNOFFICIAL
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2580
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1462
AV_CODEC_ID_NELLYMOSER
Definition: avcodec.h:584
flv_write_trailer
static int flv_write_trailer(AVFormatContext *s)
Definition: flvenc.c:766
AV_CODEC_ID_PCM_ALAW
Definition: avcodec.h:459
FLVContext::filepositions_count
int64_t filepositions_count
Definition: flvenc.c:111
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1589
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1447
FLVContext::videosize
int64_t videosize
Definition: flvenc.c:92
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:552
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
FLVContext::videosize_offset
int64_t videosize_offset
Definition: flvenc.c:91
mpeg4audio_sample_rates
static const int mpeg4audio_sample_rates[16]
Definition: aacenctab.h:85
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
ff_standardize_creation_time
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5644
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:947
FLVContext::filepositions
FLVFileposition * filepositions
Definition: flvenc.c:112
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
ff_avc_parse_nal_units_buf
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size)
Definition: avc.c:93
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1436
avcodec_descriptor_get
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3135
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3902
FLV_FRAME_INTER
inter frame (for AVC, a non-seekable frame)
Definition: flv.h:116
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
FLV_AUDIO_CODECID_OFFSET
#define FLV_AUDIO_CODECID_OFFSET
Definition: flv.h:34
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
flv_write_packet
static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: flvenc.c:870
FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
Definition: flv.h:115
FLVContext::lasttimestamp_offset
int64_t lasttimestamp_offset
Definition: flvenc.c:101
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:468
avio_wb24
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:487
AVOutputFormat::name
const char * name
Definition: avformat.h:507
FLVContext::lastkeyframelocation
int64_t lastkeyframelocation
Definition: flvenc.c:106
AV_CODEC_ID_H263
Definition: avcodec.h:222
flv_append_keyframe_info
static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
Definition: flvenc.c:546
s
#define s(width, name)
Definition: cbs_vp9.c:257
n
int n
Definition: avisynth_c.h:684
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:362
AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:453
error
static void error(const char *err)
Definition: target_dec_fuzzer.c:64
FLVFileposition::next
struct FLVFileposition * next
Definition: flvenc.c:77
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1127
FLVContext::reserved
int reserved
Definition: flvenc.c:82
AV_CODEC_ID_PCM_U8
Definition: avcodec.h:457
AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1158
flv.h
FLV common header.
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
flv_write_header
static int flv_write_header(AVFormatContext *s)
Definition: flvenc.c:653
FLVContext::framerate
AVRational framerate
Definition: flvdec.c:72
FLV_STEREO
Definition: flv.h:74
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
FLVFileposition::keyframe_position
int64_t keyframe_position
Definition: flvenc.c:75
AV_CODEC_ID_PCM_MULAW
Definition: avcodec.h:458
put_amf_string
static void put_amf_string(AVIOContext *pb, const char *str)
Definition: flvenc.c:226
buf
void * buf
Definition: avisynth_c.h:690
type
GLint GLenum type
Definition: opengl_enc.c:105
put_amf_double
static void put_amf_double(AVIOContext *pb, double d)
Definition: flvenc.c:246
FLVContext::av_class
AVClass * av_class
Definition: flvenc.c:81
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
FLVContext::data_par
AVCodecParameters * data_par
Definition: flvenc.c:118
FLVContext::lastkeyframetimestamp_offset
int64_t lastkeyframetimestamp_offset
Definition: flvenc.c:103
AVCodecDescriptor::name
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:707
AVIOContext::error
int error
contains the error code or 0 if no error happened
Definition: avio.h:245
FLVContext::datasize
int64_t datasize
Definition: flvenc.c:90
AVCodecDescriptor
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:699
aacenctab.h
AAC encoder data.
AMF_END_OF_OBJECT
#define AMF_END_OF_OBJECT
Definition: flv.h:47
put_amf_bool
static void put_amf_bool(AVIOContext *pb, int b)
Definition: flvenc.c:263
avio_wb16
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:475
av_get_media_type_string
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:76
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:3994
avformat.h
Main libavformat public API header.
FLVContext::audiosize
int64_t audiosize
Definition: flvenc.c:94
put_amf_byte
static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
Definition: flvenc.c:252
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
FLVContext::duration_offset
int64_t duration_offset
Definition: flvenc.c:83
AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: avcodec.h:645
write_metadata
static void write_metadata(AVFormatContext *s, unsigned int ts)
Definition: flvenc.c:269
AVCodecParameters::profile
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:3944
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:452
FLV_SAMPLERATE_SPECIAL
signifies 5512Hz and 8000Hz in the case of NELLYMOSER
Definition: flv.h:83
FLVContext::flags
int flags
Definition: flvenc.c:120
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:925
AVDictionaryEntry::key
char * key
Definition: dict.h:86
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
AVRational::den
int den
Denominator.
Definition: rational.h:60
FLVContext::lasttimestamp
double lasttimestamp
Definition: flvenc.c:102
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:773
put_avc_eos_tag
static void put_avc_eos_tag(AVIOContext *pb, unsigned ts)
Definition: flvenc.c:233
AVIO_DATA_MARKER_SYNC_POINT
A point in the output bytestream where a decoder can start decoding (i.e.
Definition: avio.h:122
AVFMT_VARIABLE_FPS
#define AVFMT_VARIABLE_FPS
Format allows variable fps.
Definition: avformat.h:472
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry::value
char * value
Definition: dict.h:87
len
int len
Definition: vorbis_enc_data.h:452
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1379
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3926
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3898
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:3990
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1429
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:377
AVFormatContext::duration
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
AV_DICT_IGNORE_SUFFIX
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
FLVContext::filesize_offset
int64_t filesize_offset
Definition: flvenc.c:84
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3888
FLVContext::metadata_size_pos
int64_t metadata_size_pos
Definition: flvenc.c:96
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1432
AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
AV_CODEC_ID_VP6F
Definition: avcodec.h:310
AV_CODEC_ID_ADPCM_SWF
Definition: avcodec.h:503
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1931
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
shift_data
static int shift_data(AVFormatContext *s)
Definition: flvenc.c:573
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1423
FLVStreamContext::last_ts
int64_t last_ts
last timestamp for each stream
Definition: flvenc.c:124
FLVFlags
FLVFlags
Definition: flvenc.c:66
ff_isom_write_avcc
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
Definition: avc.c:107
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
put_bits.h
bitstream writer API
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