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matroskaenc.c
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1 /*
2  * Matroska muxer
3  * Copyright (c) 2007 David Conrad
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 "avformat.h"
23 #include "internal.h"
24 #include "riff.h"
25 #include "isom.h"
26 #include "matroska.h"
27 #include "avc.h"
28 #include "flacenc.h"
29 #include "avlanguage.h"
30 #include "libavutil/samplefmt.h"
31 #include "libavutil/sha.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/intfloat.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/random_seed.h"
36 #include "libavutil/lfg.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/avstring.h"
39 #include "libavcodec/xiph.h"
40 #include "libavcodec/mpeg4audio.h"
41 
42 typedef struct ebml_master {
43  int64_t pos; ///< absolute offset in the file where the master's elements start
44  int sizebytes; ///< how many bytes were reserved for the size
45 } ebml_master;
46 
47 typedef struct mkv_seekhead_entry {
48  unsigned int elementid;
49  uint64_t segmentpos;
51 
52 typedef struct mkv_seekhead {
53  int64_t filepos;
54  int64_t segment_offset; ///< the file offset to the beginning of the segment
55  int reserved_size; ///< -1 if appending to file
59 } mkv_seekhead;
60 
61 typedef struct {
62  uint64_t pts;
63  int tracknum;
64  int64_t cluster_pos; ///< file offset of the cluster containing the block
65 } mkv_cuepoint;
66 
67 typedef struct {
68  int64_t segment_offset;
71 } mkv_cues;
72 
73 typedef struct {
74  int write_dts;
75 } mkv_track;
76 
77 #define MODE_MATROSKAv2 0x01
78 #define MODE_WEBM 0x02
79 
80 typedef struct MatroskaMuxContext {
81  int mode;
84  int64_t segment_offset;
86  int64_t cluster_pos; ///< file offset of the current cluster
87  int64_t cluster_pts;
88  int64_t duration_offset;
89  int64_t duration;
93 
94  unsigned int audio_buffer_size;
96 
99 
100 
101 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
102  * offset, 4 bytes for target EBML ID */
103 #define MAX_SEEKENTRY_SIZE 21
104 
105 /** per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2
106  * 8-byte uint max */
107 #define MAX_CUETRACKPOS_SIZE 22
108 
109 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
110 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
111 
112 
113 static int ebml_id_size(unsigned int id)
114 {
115  return (av_log2(id+1)-1)/7+1;
116 }
117 
118 static void put_ebml_id(AVIOContext *pb, unsigned int id)
119 {
120  int i = ebml_id_size(id);
121  while (i--)
122  avio_w8(pb, (uint8_t)(id >> (i*8)));
123 }
124 
125 /**
126  * Write an EBML size meaning "unknown size".
127  *
128  * @param bytes The number of bytes the size should occupy (maximum: 8).
129  */
130 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
131 {
132  av_assert0(bytes <= 8);
133  avio_w8(pb, 0x1ff >> bytes);
134  while (--bytes)
135  avio_w8(pb, 0xff);
136 }
137 
138 /**
139  * Calculate how many bytes are needed to represent a given number in EBML.
140  */
141 static int ebml_num_size(uint64_t num)
142 {
143  int bytes = 1;
144  while ((num+1) >> bytes*7) bytes++;
145  return bytes;
146 }
147 
148 /**
149  * Write a number in EBML variable length format.
150  *
151  * @param bytes The number of bytes that need to be used to write the number.
152  * If zero, any number of bytes can be used.
153  */
154 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
155 {
156  int i, needed_bytes = ebml_num_size(num);
157 
158  // sizes larger than this are currently undefined in EBML
159  av_assert0(num < (1ULL<<56)-1);
160 
161  if (bytes == 0)
162  // don't care how many bytes are used, so use the min
163  bytes = needed_bytes;
164  // the bytes needed to write the given size would exceed the bytes
165  // that we need to use, so write unknown size. This shouldn't happen.
166  av_assert0(bytes >= needed_bytes);
167 
168  num |= 1ULL << bytes*7;
169  for (i = bytes - 1; i >= 0; i--)
170  avio_w8(pb, (uint8_t)(num >> i*8));
171 }
172 
173 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
174 {
175  int i, bytes = 1;
176  uint64_t tmp = val;
177  while (tmp>>=8) bytes++;
178 
179  put_ebml_id(pb, elementid);
180  put_ebml_num(pb, bytes, 0);
181  for (i = bytes - 1; i >= 0; i--)
182  avio_w8(pb, (uint8_t)(val >> i*8));
183 }
184 
185 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
186 {
187  put_ebml_id(pb, elementid);
188  put_ebml_num(pb, 8, 0);
189  avio_wb64(pb, av_double2int(val));
190 }
191 
192 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
193  const void *buf, int size)
194 {
195  put_ebml_id(pb, elementid);
196  put_ebml_num(pb, size, 0);
197  avio_write(pb, buf, size);
198 }
199 
200 static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
201 {
202  put_ebml_binary(pb, elementid, str, strlen(str));
203 }
204 
205 /**
206  * Write a void element of a given size. Useful for reserving space in
207  * the file to be written to later.
208  *
209  * @param size The number of bytes to reserve, which must be at least 2.
210  */
211 static void put_ebml_void(AVIOContext *pb, uint64_t size)
212 {
213  int64_t currentpos = avio_tell(pb);
214 
215  av_assert0(size >= 2);
216 
218  // we need to subtract the length needed to store the size from the
219  // size we need to reserve so 2 cases, we use 8 bytes to store the
220  // size if possible, 1 byte otherwise
221  if (size < 10)
222  put_ebml_num(pb, size-1, 0);
223  else
224  put_ebml_num(pb, size-9, 8);
225  while(avio_tell(pb) < currentpos + size)
226  avio_w8(pb, 0);
227 }
228 
229 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
230 {
231  int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
232  put_ebml_id(pb, elementid);
233  put_ebml_size_unknown(pb, bytes);
234  return (ebml_master){ avio_tell(pb), bytes };
235 }
236 
237 static void end_ebml_master(AVIOContext *pb, ebml_master master)
238 {
239  int64_t pos = avio_tell(pb);
240 
241  if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
242  return;
243  put_ebml_num(pb, pos - master.pos, master.sizebytes);
244  avio_seek(pb, pos, SEEK_SET);
245 }
246 
247 static void put_xiph_size(AVIOContext *pb, int size)
248 {
249  int i;
250  for (i = 0; i < size / 255; i++)
251  avio_w8(pb, 255);
252  avio_w8(pb, size % 255);
253 }
254 
255 /**
256  * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
257  * elements. If a maximum number of elements is specified, enough space
258  * will be reserved at the current file location to write a seek head of
259  * that size.
260  *
261  * @param segment_offset The absolute offset to the position in the file
262  * where the segment begins.
263  * @param numelements The maximum number of elements that will be indexed
264  * by this seek head, 0 if unlimited.
265  */
266 static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
267 {
268  mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
269  if (new_seekhead == NULL)
270  return NULL;
271 
272  new_seekhead->segment_offset = segment_offset;
273 
274  if (numelements > 0) {
275  new_seekhead->filepos = avio_tell(pb);
276  // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
277  // and size, and 3 bytes to guarantee that an EBML void element
278  // will fit afterwards
279  new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
280  new_seekhead->max_entries = numelements;
281  put_ebml_void(pb, new_seekhead->reserved_size);
282  }
283  return new_seekhead;
284 }
285 
286 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
287 {
288  mkv_seekhead_entry *entries = seekhead->entries;
289 
290  // don't store more elements than we reserved space for
291  if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
292  return -1;
293 
294  entries = av_realloc(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry));
295  if (entries == NULL)
296  return AVERROR(ENOMEM);
297 
298  entries[seekhead->num_entries ].elementid = elementid;
299  entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
300 
301  seekhead->entries = entries;
302  return 0;
303 }
304 
305 /**
306  * Write the seek head to the file and free it. If a maximum number of
307  * elements was specified to mkv_start_seekhead(), the seek head will
308  * be written at the location reserved for it. Otherwise, it is written
309  * at the current location in the file.
310  *
311  * @return The file offset where the seekhead was written,
312  * -1 if an error occurred.
313  */
314 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
315 {
316  ebml_master metaseek, seekentry;
317  int64_t currentpos;
318  int i;
319 
320  currentpos = avio_tell(pb);
321 
322  if (seekhead->reserved_size > 0) {
323  if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
324  currentpos = -1;
325  goto fail;
326  }
327  }
328 
329  metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
330  for (i = 0; i < seekhead->num_entries; i++) {
331  mkv_seekhead_entry *entry = &seekhead->entries[i];
332 
334 
336  put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
337  put_ebml_id(pb, entry->elementid);
338 
340  end_ebml_master(pb, seekentry);
341  }
342  end_ebml_master(pb, metaseek);
343 
344  if (seekhead->reserved_size > 0) {
345  uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
346  put_ebml_void(pb, remaining);
347  avio_seek(pb, currentpos, SEEK_SET);
348 
349  currentpos = seekhead->filepos;
350  }
351 fail:
352  av_free(seekhead->entries);
353  av_free(seekhead);
354 
355  return currentpos;
356 }
357 
358 static mkv_cues * mkv_start_cues(int64_t segment_offset)
359 {
360  mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
361  if (cues == NULL)
362  return NULL;
363 
364  cues->segment_offset = segment_offset;
365  return cues;
366 }
367 
368 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos)
369 {
370  mkv_cuepoint *entries = cues->entries;
371 
372  if (ts < 0)
373  return 0;
374 
375  entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint));
376  if (entries == NULL)
377  return AVERROR(ENOMEM);
378 
379  entries[cues->num_entries ].pts = ts;
380  entries[cues->num_entries ].tracknum = stream + 1;
381  entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset;
382 
383  cues->entries = entries;
384  return 0;
385 }
386 
387 static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, int num_tracks)
388 {
389  ebml_master cues_element;
390  int64_t currentpos;
391  int i, j;
392 
393  currentpos = avio_tell(pb);
394  cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
395 
396  for (i = 0; i < cues->num_entries; i++) {
397  ebml_master cuepoint, track_positions;
398  mkv_cuepoint *entry = &cues->entries[i];
399  uint64_t pts = entry->pts;
400 
401  cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
403 
404  // put all the entries from different tracks that have the exact same
405  // timestamp into the same CuePoint
406  for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
408  put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
409  put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION, entry[j].cluster_pos);
410  end_ebml_master(pb, track_positions);
411  }
412  i += j - 1;
413  end_ebml_master(pb, cuepoint);
414  }
415  end_ebml_master(pb, cues_element);
416 
417  return currentpos;
418 }
419 
421 {
422  uint8_t *header_start[3];
423  int header_len[3];
424  int first_header_size;
425  int j;
426 
427  if (codec->codec_id == AV_CODEC_ID_VORBIS)
428  first_header_size = 30;
429  else
430  first_header_size = 42;
431 
433  first_header_size, header_start, header_len) < 0) {
434  av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
435  return -1;
436  }
437 
438  avio_w8(pb, 2); // number packets - 1
439  for (j = 0; j < 2; j++) {
440  put_xiph_size(pb, header_len[j]);
441  }
442  for (j = 0; j < 3; j++)
443  avio_write(pb, header_start[j], header_len[j]);
444 
445  return 0;
446 }
447 
448 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
449 {
450  MPEG4AudioConfig mp4ac;
451 
452  if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
453  codec->extradata_size * 8, 1) < 0) {
454  av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
455  return;
456  }
457 
458  *sample_rate = mp4ac.sample_rate;
459  *output_sample_rate = mp4ac.ext_sample_rate;
460 }
461 
462 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
463 {
464  AVIOContext *dyn_cp;
465  uint8_t *codecpriv;
466  int ret, codecpriv_size;
467 
468  ret = avio_open_dyn_buf(&dyn_cp);
469  if(ret < 0)
470  return ret;
471 
472  if (native_id) {
473  if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA)
474  ret = put_xiph_codecpriv(s, dyn_cp, codec);
475  else if (codec->codec_id == AV_CODEC_ID_FLAC)
476  ret = ff_flac_write_header(dyn_cp, codec, 1);
477  else if (codec->codec_id == AV_CODEC_ID_H264)
478  ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
479  else if (codec->codec_id == AV_CODEC_ID_ALAC) {
480  if (codec->extradata_size < 36) {
481  av_log(s, AV_LOG_ERROR,
482  "Invalid extradata found, ALAC expects a 36-byte "
483  "QuickTime atom.");
484  ret = AVERROR_INVALIDDATA;
485  } else
486  avio_write(dyn_cp, codec->extradata + 12,
487  codec->extradata_size - 12);
488  }
489  else if (codec->extradata_size)
490  avio_write(dyn_cp, codec->extradata, codec->extradata_size);
491  } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
492  if (qt_id) {
493  if (!codec->codec_tag)
495  if (codec->extradata_size)
496  avio_write(dyn_cp, codec->extradata, codec->extradata_size);
497  } else {
498  if (!codec->codec_tag)
500  if (!codec->codec_tag) {
501  av_log(s, AV_LOG_ERROR, "No bmp codec ID found.\n");
502  ret = -1;
503  }
504 
505  ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
506  }
507 
508  } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
509  unsigned int tag;
511  if (!tag) {
512  av_log(s, AV_LOG_ERROR, "No wav codec ID found.\n");
513  ret = -1;
514  }
515  if (!codec->codec_tag)
516  codec->codec_tag = tag;
517 
518  ff_put_wav_header(dyn_cp, codec);
519  }
520 
521  codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
522  if (codecpriv_size)
523  put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
524  av_free(codecpriv);
525  return ret;
526 }
527 
529 {
530  MatroskaMuxContext *mkv = s->priv_data;
531  AVIOContext *pb = s->pb;
532  ebml_master tracks;
533  int i, j, ret;
534 
536  if (ret < 0) return ret;
537 
538  tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
539  for (i = 0; i < s->nb_streams; i++) {
540  AVStream *st = s->streams[i];
541  AVCodecContext *codec = st->codec;
542  ebml_master subinfo, track;
543  int native_id = 0;
544  int qt_id = 0;
545  int bit_depth = av_get_bits_per_sample(codec->codec_id);
546  int sample_rate = codec->sample_rate;
547  int output_sample_rate = 0;
549 
550  if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
551  mkv->have_attachments = 1;
552  continue;
553  }
554 
555  if (!bit_depth)
556  bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
557 
558  if (codec->codec_id == AV_CODEC_ID_AAC)
559  get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
560 
563  put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1);
564  put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
565 
566  if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
568  tag = av_dict_get(st->metadata, "language", NULL, 0);
569  put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
570 
571  if (st->disposition)
573 
574  // look for a codec ID string specific to mkv to use,
575  // if none are found, use AVI codes
576  for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
577  if (ff_mkv_codec_tags[j].id == codec->codec_id) {
579  native_id = 1;
580  break;
581  }
582  }
583 
584  if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
585  codec->codec_id == AV_CODEC_ID_VORBIS)) {
586  av_log(s, AV_LOG_ERROR,
587  "Only VP8 video and Vorbis audio are supported for WebM.\n");
588  return AVERROR(EINVAL);
589  }
590 
591  switch (codec->codec_type) {
592  case AVMEDIA_TYPE_VIDEO:
594  if(st->avg_frame_rate.num && st->avg_frame_rate.den && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
596  else
598 
599  if (!native_id &&
602  || codec->codec_id == AV_CODEC_ID_SVQ1
603  || codec->codec_id == AV_CODEC_ID_SVQ3
604  || codec->codec_id == AV_CODEC_ID_CINEPAK))
605  qt_id = 1;
606 
607  if (qt_id)
608  put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
609  else if (!native_id) {
610  // if there is no mkv-specific codec ID, use VFW mode
611  put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
612  mkv->tracks[i].write_dts = 1;
613  }
614 
615  subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
616  // XXX: interlace flag?
619 
620  if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
621  (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
622  // save stereo mode flag
623  uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
624 
625  for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
626  if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
627  st_mode = j;
628  break;
629  }
630 
631  if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
632  || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
633  av_log(s, AV_LOG_ERROR,
634  "The specified stereo mode is not valid.\n");
635  return AVERROR(EINVAL);
636  } else
638  }
639 
640  if (st->sample_aspect_ratio.num) {
641  int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
642  if (d_width > INT_MAX) {
643  av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
644  return AVERROR(EINVAL);
645  }
648  }
649 
650  if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
651  uint32_t color_space = av_le2ne32(codec->codec_tag);
652  put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
653  }
654  end_ebml_master(pb, subinfo);
655  break;
656 
657  case AVMEDIA_TYPE_AUDIO:
659 
660  if (!native_id)
661  // no mkv-specific ID, use ACM mode
662  put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
663 
664  subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
667  if (output_sample_rate)
668  put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
669  if (bit_depth)
671  end_ebml_master(pb, subinfo);
672  break;
673 
676  if (!native_id) {
677  av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
678  return AVERROR(ENOSYS);
679  }
680  break;
681  default:
682  av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
683  break;
684  }
685  ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
686  if (ret < 0) return ret;
687 
688  end_ebml_master(pb, track);
689 
690  // ms precision is the de-facto standard timescale for mkv files
691  avpriv_set_pts_info(st, 64, 1, 1000);
692  }
693  end_ebml_master(pb, tracks);
694  return 0;
695 }
696 
698 {
699  MatroskaMuxContext *mkv = s->priv_data;
700  AVIOContext *pb = s->pb;
701  ebml_master chapters, editionentry;
702  AVRational scale = {1, 1E9};
703  int i, ret;
704 
705  if (!s->nb_chapters)
706  return 0;
707 
709  if (ret < 0) return ret;
710 
711  chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
712  editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
715  for (i = 0; i < s->nb_chapters; i++) {
716  ebml_master chapteratom, chapterdisplay;
717  AVChapter *c = s->chapters[i];
719 
720  chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
723  av_rescale_q(c->start, c->time_base, scale));
725  av_rescale_q(c->end, c->time_base, scale));
728  if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
729  chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
732  end_ebml_master(pb, chapterdisplay);
733  }
734  end_ebml_master(pb, chapteratom);
735  }
736  end_ebml_master(pb, editionentry);
737  end_ebml_master(pb, chapters);
738  return 0;
739 }
740 
742 {
743  uint8_t *key = av_strdup(t->key);
744  uint8_t *p = key;
745  const uint8_t *lang = NULL;
747 
748  if ((p = strrchr(p, '-')) &&
749  (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
750  *p = 0;
751 
752  p = key;
753  while (*p) {
754  if (*p == ' ')
755  *p = '_';
756  else if (*p >= 'a' && *p <= 'z')
757  *p -= 'a' - 'A';
758  p++;
759  }
760 
763  if (lang)
766  end_ebml_master(pb, tag);
767 
768  av_freep(&key);
769 }
770 
771 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
772  unsigned int uid, ebml_master *tags)
773 {
774  MatroskaMuxContext *mkv = s->priv_data;
775  ebml_master tag, targets;
777  int ret;
778 
779  if (!tags->pos) {
781  if (ret < 0) return ret;
782 
783  *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
784  }
785 
786  tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
787  targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
788  if (elementid)
789  put_ebml_uint(s->pb, elementid, uid);
790  end_ebml_master(s->pb, targets);
791 
792  while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
793  if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
794  mkv_write_simpletag(s->pb, t);
795 
796  end_ebml_master(s->pb, tag);
797  return 0;
798 }
799 
801 {
802  ebml_master tags = {0};
803  int i, ret;
804 
806 
808  ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
809  if (ret < 0) return ret;
810  }
811 
812  for (i = 0; i < s->nb_streams; i++) {
813  AVStream *st = s->streams[i];
814 
815  if (!av_dict_get(st->metadata, "", 0, AV_DICT_IGNORE_SUFFIX))
816  continue;
817 
818  ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
819  if (ret < 0) return ret;
820  }
821 
822  for (i = 0; i < s->nb_chapters; i++) {
823  AVChapter *ch = s->chapters[i];
824 
826  continue;
827 
828  ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id, &tags);
829  if (ret < 0) return ret;
830  }
831 
832  if (tags.pos)
833  end_ebml_master(s->pb, tags);
834  return 0;
835 }
836 
838 {
839  MatroskaMuxContext *mkv = s->priv_data;
840  AVIOContext *pb = s->pb;
841  ebml_master attachments;
842  AVLFG c;
843  int i, ret;
844 
845  if (!mkv->have_attachments)
846  return 0;
847 
849 
851  if (ret < 0) return ret;
852 
853  attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
854 
855  for (i = 0; i < s->nb_streams; i++) {
856  AVStream *st = s->streams[i];
857  ebml_master attached_file;
859  const char *mimetype = NULL;
860  uint64_t fileuid;
861 
863  continue;
864 
865  attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
866 
867  if (t = av_dict_get(st->metadata, "title", NULL, 0))
869  if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
870  av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
871  return AVERROR(EINVAL);
872  }
874  if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
875  mimetype = t->value;
876  else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
877  int i;
878  for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
879  if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
880  mimetype = ff_mkv_mime_tags[i].str;
881  break;
882  }
883  }
884  if (!mimetype) {
885  av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
886  "it cannot be deduced from the codec id.\n", i);
887  return AVERROR(EINVAL);
888  }
889 
890  if (st->codec->flags & CODEC_FLAG_BITEXACT) {
891  struct AVSHA *sha = av_sha_alloc();
892  uint8_t digest[20];
893  if (!sha)
894  return AVERROR(ENOMEM);
895  av_sha_init(sha, 160);
897  av_sha_final(sha, digest);
898  av_free(sha);
899  fileuid = AV_RL64(digest);
900  } else {
901  fileuid = av_lfg_get(&c);
902  }
903  av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
904  fileuid, i);
905 
908  put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
909  end_ebml_master(pb, attached_file);
910  }
911  end_ebml_master(pb, attachments);
912 
913  return 0;
914 }
915 
917 {
918  MatroskaMuxContext *mkv = s->priv_data;
919  AVIOContext *pb = s->pb;
920  ebml_master ebml_header, segment_info;
922  int ret, i;
923 
924  if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
925  else mkv->mode = MODE_MATROSKAv2;
926 
927  if (s->avoid_negative_ts < 0)
928  s->avoid_negative_ts = 1;
929 
930  mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
931  if (!mkv->tracks)
932  return AVERROR(ENOMEM);
933 
934  ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
942  end_ebml_master(pb, ebml_header);
943 
945  mkv->segment_offset = avio_tell(pb);
946 
947  // we write 2 seek heads - one at the end of the file to point to each
948  // cluster, and one at the beginning to point to all other level one
949  // elements (including the seek head at the end of the file), which
950  // isn't more than 10 elements if we only write one of each other
951  // currently defined level 1 element
952  mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
953  if (!mkv->main_seekhead)
954  return AVERROR(ENOMEM);
955 
957  if (ret < 0) return ret;
958 
959  segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
961  if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
963  if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
964  uint32_t segment_uid[4];
965  AVLFG lfg;
966 
968 
969  for (i = 0; i < 4; i++)
970  segment_uid[i] = av_lfg_get(&lfg);
971 
974  put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
975  }
976 
977  if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
978  // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
979  int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
980  uint8_t date_utc_buf[8];
981  AV_WB64(date_utc_buf, date_utc);
982  put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
983  }
984 
985  // reserve space for the duration
986  mkv->duration = 0;
987  mkv->duration_offset = avio_tell(pb);
988  put_ebml_void(pb, 11); // assumes double-precision float to be written
989  end_ebml_master(pb, segment_info);
990 
991  ret = mkv_write_tracks(s);
992  if (ret < 0) return ret;
993 
994  if (mkv->mode != MODE_WEBM) {
995  ret = mkv_write_chapters(s);
996  if (ret < 0) return ret;
997 
998  ret = mkv_write_tags(s);
999  if (ret < 0) return ret;
1000 
1001  ret = mkv_write_attachments(s);
1002  if (ret < 0) return ret;
1003  }
1004 
1005  if (!s->pb->seekable)
1007 
1008  mkv->cues = mkv_start_cues(mkv->segment_offset);
1009  if (mkv->cues == NULL)
1010  return AVERROR(ENOMEM);
1011 
1013  mkv->cur_audio_pkt.size = 0;
1014  mkv->audio_buffer_size = 0;
1015  mkv->cluster_pos = -1;
1016 
1017  avio_flush(pb);
1018  return 0;
1019 }
1020 
1021 static int mkv_blockgroup_size(int pkt_size)
1022 {
1023  int size = pkt_size + 4;
1024  size += ebml_num_size(size);
1025  size += 2; // EBML ID for block and block duration
1026  size += 8; // max size of block duration
1027  size += ebml_num_size(size);
1028  size += 1; // blockgroup EBML ID
1029  return size;
1030 }
1031 
1032 static int ass_get_duration(const uint8_t *p)
1033 {
1034  int sh, sm, ss, sc, eh, em, es, ec;
1035  uint64_t start, end;
1036 
1037  if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1038  &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1039  return 0;
1040  start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc;
1041  end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec;
1042  return end - start;
1043 }
1044 
1046 {
1047  MatroskaMuxContext *mkv = s->priv_data;
1048  int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
1049  uint8_t *start, *end, *data = pkt->data;
1050  ebml_master blockgroup;
1051  char buffer[2048];
1052 
1053  while (data_size) {
1054  int duration = ass_get_duration(data);
1055  max_duration = FFMAX(duration, max_duration);
1056  end = memchr(data, '\n', data_size);
1057  size = line_size = end ? end-data+1 : data_size;
1058  size -= end ? (end[-1]=='\r')+1 : 0;
1059  start = data;
1060  for (i=0; i<3; i++, start++)
1061  if (!(start = memchr(start, ',', size-(start-data))))
1062  return max_duration;
1063  size -= start - data;
1064  sscanf(data, "Dialogue: %d,", &layer);
1065  i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
1066  s->streams[pkt->stream_index]->nb_frames, layer);
1067  size = FFMIN(i+size, sizeof(buffer));
1068  memcpy(buffer+i, start, size-i);
1069 
1070  av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1071  "pts %" PRId64 ", duration %d\n",
1072  avio_tell(pb), size, pkt->pts, duration);
1075  put_ebml_num(pb, size+4, 0);
1076  avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1077  avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1078  avio_w8(pb, 0);
1079  avio_write(pb, buffer, size);
1081  end_ebml_master(pb, blockgroup);
1082 
1083  data += line_size;
1084  data_size -= line_size;
1085  }
1086 
1087  return max_duration;
1088 }
1089 
1091  unsigned int blockid, AVPacket *pkt, int flags)
1092 {
1093  MatroskaMuxContext *mkv = s->priv_data;
1094  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1095  uint8_t *data = NULL;
1096  int offset = 0, size = pkt->size;
1097  int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1098 
1099  av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1100  "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1101  avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1102  if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1103  (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1104  ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1105  else
1106  data = pkt->data;
1107 
1108  if (codec->codec_id == AV_CODEC_ID_PRORES) {
1109  /* Matroska specification requires to remove the first QuickTime atom
1110  */
1111  size -= 8;
1112  offset = 8;
1113  }
1114 
1115  put_ebml_id(pb, blockid);
1116  put_ebml_num(pb, size+4, 0);
1117  avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1118  avio_wb16(pb, ts - mkv->cluster_pts);
1119  avio_w8(pb, flags);
1120  avio_write(pb, data + offset, size);
1121  if (data != pkt->data)
1122  av_free(data);
1123 }
1124 
1125 static int srt_get_duration(uint8_t **buf)
1126 {
1127  int i, duration = 0;
1128 
1129  for (i=0; i<2 && !duration; i++) {
1130  int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1131  if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1132  &s_hour, &s_min, &s_sec, &s_hsec,
1133  &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1134  s_min += 60*s_hour; e_min += 60*e_hour;
1135  s_sec += 60*s_min; e_sec += 60*e_min;
1136  s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
1137  duration = e_hsec - s_hsec;
1138  }
1139  *buf += strcspn(*buf, "\n") + 1;
1140  }
1141  return duration;
1142 }
1143 
1145 {
1146  ebml_master blockgroup;
1147  AVPacket pkt2 = *pkt;
1148  int64_t duration = srt_get_duration(&pkt2.data);
1149  pkt2.size -= pkt2.data - pkt->data;
1150 
1151  blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1152  mkv_blockgroup_size(pkt2.size));
1153  mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1155  end_ebml_master(pb, blockgroup);
1156 
1157  return duration;
1158 }
1159 
1161 {
1162  MatroskaMuxContext *mkv = s->priv_data;
1163  int bufsize;
1164  uint8_t *dyn_buf;
1165 
1166  if (!mkv->dyn_bc)
1167  return;
1168 
1169  bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1170  avio_write(s->pb, dyn_buf, bufsize);
1171  av_free(dyn_buf);
1172  mkv->dyn_bc = NULL;
1173 }
1174 
1176 {
1177  MatroskaMuxContext *mkv = s->priv_data;
1178  AVIOContext *pb = s->pb;
1179  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1180  int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1181  int duration = pkt->duration;
1182  int ret;
1183  int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1184 
1185  if (ts == AV_NOPTS_VALUE) {
1186  av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1187  return AVERROR(EINVAL);
1188  }
1189 
1190  if (!s->pb->seekable) {
1191  if (!mkv->dyn_bc) {
1192  if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1193  av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1194  return ret;
1195  }
1196  }
1197  pb = mkv->dyn_bc;
1198  }
1199 
1200  if (mkv->cluster_pos == -1) {
1201  mkv->cluster_pos = avio_tell(s->pb);
1204  mkv->cluster_pts = FFMAX(0, ts);
1205  }
1206 
1207  if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1208  mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1209  } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1210  duration = mkv_write_ass_blocks(s, pb, pkt);
1211  } else if (codec->codec_id == AV_CODEC_ID_SRT) {
1212  duration = mkv_write_srt_blocks(s, pb, pkt);
1213  } else {
1215  /* For backward compatibility, prefer convergence_duration. */
1216  if (pkt->convergence_duration > 0) {
1217  duration = pkt->convergence_duration;
1218  }
1219  mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1221  end_ebml_master(pb, blockgroup);
1222  }
1223 
1224  if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) {
1225  ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos);
1226  if (ret < 0) return ret;
1227  }
1228 
1229  mkv->duration = FFMAX(mkv->duration, ts + duration);
1230  return 0;
1231 }
1232 
1234 {
1235  uint8_t *data = mkv->cur_audio_pkt.data;
1236  mkv->cur_audio_pkt = *pkt;
1237  mkv->cur_audio_pkt.data = av_fast_realloc(data, &mkv->audio_buffer_size, pkt->size);
1238  if (!mkv->cur_audio_pkt.data)
1239  return AVERROR(ENOMEM);
1240 
1241  memcpy(mkv->cur_audio_pkt.data, pkt->data, pkt->size);
1242  mkv->cur_audio_pkt.size = pkt->size;
1243  return 0;
1244 }
1245 
1247 {
1248  MatroskaMuxContext *mkv = s->priv_data;
1249  AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc;
1250  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1251  int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1252  int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1253  int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0);
1254 
1255  // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1256  // after 4k and on a keyframe
1257  if (mkv->cluster_pos != -1 &&
1258  ((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000))
1259  || cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000
1260  || (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) {
1261  av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
1262  " bytes, pts %" PRIu64 "\n", avio_tell(pb), ts);
1263  end_ebml_master(pb, mkv->cluster);
1264  mkv->cluster_pos = -1;
1265  if (mkv->dyn_bc)
1266  mkv_flush_dynbuf(s);
1267  }
1268 
1269  // check if we have an audio packet cached
1270  if (mkv->cur_audio_pkt.size > 0) {
1271  ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1272  mkv->cur_audio_pkt.size = 0;
1273  if (ret < 0) {
1274  av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1275  return ret;
1276  }
1277  }
1278 
1279  // buffer an audio packet to ensure the packet containing the video
1280  // keyframe's timecode is contained in the same cluster for WebM
1281  if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
1282  ret = mkv_copy_packet(mkv, pkt);
1283  else
1284  ret = mkv_write_packet_internal(s, pkt);
1285  return ret;
1286 }
1287 
1289 {
1290  MatroskaMuxContext *mkv = s->priv_data;
1291  AVIOContext *pb = s->pb;
1292  int64_t currentpos, cuespos;
1293  int ret;
1294 
1295  // check if we have an audio packet cached
1296  if (mkv->cur_audio_pkt.size > 0) {
1297  ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1298  mkv->cur_audio_pkt.size = 0;
1299  if (ret < 0) {
1300  av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1301  return ret;
1302  }
1303  }
1304 
1305  if (mkv->dyn_bc) {
1306  end_ebml_master(mkv->dyn_bc, mkv->cluster);
1307  mkv_flush_dynbuf(s);
1308  } else if (mkv->cluster_pos != -1) {
1309  end_ebml_master(pb, mkv->cluster);
1310  }
1311 
1312  if (pb->seekable) {
1313  if (mkv->cues->num_entries) {
1314  cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
1315 
1317  if (ret < 0) return ret;
1318  }
1319 
1321 
1322  // update the duration
1323  av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1324  currentpos = avio_tell(pb);
1325  avio_seek(pb, mkv->duration_offset, SEEK_SET);
1327 
1328  avio_seek(pb, currentpos, SEEK_SET);
1329  }
1330 
1331  end_ebml_master(pb, mkv->segment);
1332  av_free(mkv->tracks);
1333  av_freep(&mkv->cues->entries);
1334  av_freep(&mkv->cues);
1336 
1337  return 0;
1338 }
1339 
1340 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1341 {
1342  int i;
1343  for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1344  if (ff_mkv_codec_tags[i].id == codec_id)
1345  return 1;
1346 
1347  if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
1348  enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
1349  if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1350  return 1;
1351  }
1352 
1353  return 0;
1354 }
1355 
1357  { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1358  { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1359  { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1360  { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1361  { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1362  { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1363  { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1364  { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1365  { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1366  { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1367  { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1368  { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1369  { AV_CODEC_ID_TTA, 0xFFFFFFFF },
1370  { AV_CODEC_ID_WAVPACK, 0xFFFFFFFF },
1371  { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1372 };
1373 
1375  { AV_CODEC_ID_PRORES, 0xFFFFFFFF },
1376  { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1377  { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1378  { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1379  { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1380  { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1381 };
1382 
1383 #if CONFIG_MATROSKA_MUXER
1384 AVOutputFormat ff_matroska_muxer = {
1385  .name = "matroska",
1386  .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1387  .mime_type = "video/x-matroska",
1388  .extensions = "mkv",
1389  .priv_data_size = sizeof(MatroskaMuxContext),
1390  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1392  .video_codec = CONFIG_LIBX264_ENCODER ?
1399  .codec_tag = (const AVCodecTag* const []){
1402  },
1403  .subtitle_codec = AV_CODEC_ID_SSA,
1404  .query_codec = mkv_query_codec,
1405 };
1406 #endif
1407 
1408 #if CONFIG_WEBM_MUXER
1409 AVOutputFormat ff_webm_muxer = {
1410  .name = "webm",
1411  .long_name = NULL_IF_CONFIG_SMALL("WebM"),
1412  .mime_type = "video/webm",
1413  .extensions = "webm",
1414  .priv_data_size = sizeof(MatroskaMuxContext),
1415  .audio_codec = AV_CODEC_ID_VORBIS,
1416  .video_codec = AV_CODEC_ID_VP8,
1422 };
1423 #endif
1424 
1425 #if CONFIG_MATROSKA_AUDIO_MUXER
1426 AVOutputFormat ff_matroska_audio_muxer = {
1427  .name = "matroska",
1428  .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1429  .mime_type = "audio/x-matroska",
1430  .extensions = "mka",
1431  .priv_data_size = sizeof(MatroskaMuxContext),
1432  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1433  AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1434  .video_codec = AV_CODEC_ID_NONE,
1439  .codec_tag = (const AVCodecTag* const []){
1441  },
1442 };
1443 #endif