3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
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.
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.
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
26 #include "avio_internal.h"
27 #include "avlanguage.h"
33 #include "subtitles.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/intfloat.h"
39 #include "libavutil/intreadwrite.h"
40 #include "libavutil/lfg.h"
41 #include "libavutil/mathematics.h"
42 #include "libavutil/opt.h"
43 #include "libavutil/random_seed.h"
44 #include "libavutil/samplefmt.h"
45 #include "libavutil/sha.h"
47 #include "libavcodec/xiph.h"
48 #include "libavcodec/mpeg4audio.h"
49 #include "libavcodec/internal.h"
51 typedef struct ebml_master {
52 int64_t pos; ///< absolute offset in the file where the master's elements start
53 int sizebytes; ///< how many bytes were reserved for the size
56 typedef struct mkv_seekhead_entry {
57 unsigned int elementid;
61 typedef struct mkv_seekhead {
63 int64_t segment_offset; ///< the file offset to the beginning of the segment
64 int reserved_size; ///< -1 if appending to file
66 mkv_seekhead_entry *entries;
73 int64_t cluster_pos; ///< file offset of the cluster containing the block
74 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
75 int64_t duration; ///< duration of the block according to time base
79 int64_t segment_offset;
80 mkv_cuepoint *entries;
89 #define MODE_MATROSKAv2 0x01
90 #define MODE_WEBM 0x02
92 typedef struct MatroskaMuxContext {
97 int64_t segment_offset;
99 int64_t cluster_pos; ///< file offset of the current cluster
101 int64_t duration_offset;
103 mkv_seekhead *main_seekhead;
107 AVPacket cur_audio_pkt;
109 int have_attachments;
111 int reserve_cues_space;
112 int cluster_size_limit;
114 int64_t cluster_time_limit;
116 uint32_t chapter_id_offset;
118 } MatroskaMuxContext;
121 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
122 * offset, 4 bytes for target EBML ID */
123 #define MAX_SEEKENTRY_SIZE 21
125 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
127 #define MAX_CUETRACKPOS_SIZE 42
129 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
130 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
132 /** Seek preroll value for opus */
133 #define OPUS_SEEK_PREROLL 80000000
136 static int ebml_id_size(unsigned int id)
138 return (av_log2(id+1)-1)/7+1;
141 static void put_ebml_id(AVIOContext *pb, unsigned int id)
143 int i = ebml_id_size(id);
145 avio_w8(pb, (uint8_t)(id >> (i*8)));
149 * Write an EBML size meaning "unknown size".
151 * @param bytes The number of bytes the size should occupy (maximum: 8).
153 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
155 av_assert0(bytes <= 8);
156 avio_w8(pb, 0x1ff >> bytes);
157 ffio_fill(pb, 0xff, bytes - 1);
161 * Calculate how many bytes are needed to represent a given number in EBML.
163 static int ebml_num_size(uint64_t num)
166 while ((num+1) >> bytes*7) bytes++;
171 * Write a number in EBML variable length format.
173 * @param bytes The number of bytes that need to be used to write the number.
174 * If zero, any number of bytes can be used.
176 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
178 int i, needed_bytes = ebml_num_size(num);
180 // sizes larger than this are currently undefined in EBML
181 av_assert0(num < (1ULL<<56)-1);
184 // don't care how many bytes are used, so use the min
185 bytes = needed_bytes;
186 // the bytes needed to write the given size would exceed the bytes
187 // that we need to use, so write unknown size. This shouldn't happen.
188 av_assert0(bytes >= needed_bytes);
190 num |= 1ULL << bytes*7;
191 for (i = bytes - 1; i >= 0; i--)
192 avio_w8(pb, (uint8_t)(num >> i*8));
195 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
199 while (tmp>>=8) bytes++;
201 put_ebml_id(pb, elementid);
202 put_ebml_num(pb, bytes, 0);
203 for (i = bytes - 1; i >= 0; i--)
204 avio_w8(pb, (uint8_t)(val >> i*8));
207 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
210 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
212 while (tmp>>=8) bytes++;
214 put_ebml_id(pb, elementid);
215 put_ebml_num(pb, bytes, 0);
216 for (i = bytes - 1; i >= 0; i--)
217 avio_w8(pb, (uint8_t)(val >> i*8));
220 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
222 put_ebml_id(pb, elementid);
223 put_ebml_num(pb, 8, 0);
224 avio_wb64(pb, av_double2int(val));
227 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
228 const void *buf, int size)
230 put_ebml_id(pb, elementid);
231 put_ebml_num(pb, size, 0);
232 avio_write(pb, buf, size);
235 static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
237 put_ebml_binary(pb, elementid, str, strlen(str));
241 * Write a void element of a given size. Useful for reserving space in
242 * the file to be written to later.
244 * @param size The number of bytes to reserve, which must be at least 2.
246 static void put_ebml_void(AVIOContext *pb, uint64_t size)
248 int64_t currentpos = avio_tell(pb);
250 av_assert0(size >= 2);
252 put_ebml_id(pb, EBML_ID_VOID);
253 // we need to subtract the length needed to store the size from the
254 // size we need to reserve so 2 cases, we use 8 bytes to store the
255 // size if possible, 1 byte otherwise
257 put_ebml_num(pb, size-1, 0);
259 put_ebml_num(pb, size-9, 8);
260 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
263 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
265 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
266 put_ebml_id(pb, elementid);
267 put_ebml_size_unknown(pb, bytes);
268 return (ebml_master){ avio_tell(pb), bytes };
271 static void end_ebml_master(AVIOContext *pb, ebml_master master)
273 int64_t pos = avio_tell(pb);
275 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
277 put_ebml_num(pb, pos - master.pos, master.sizebytes);
278 avio_seek(pb, pos, SEEK_SET);
281 static void put_xiph_size(AVIOContext *pb, int size)
283 ffio_fill(pb, 255, size / 255);
284 avio_w8(pb, size % 255);
288 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
289 * elements. If a maximum number of elements is specified, enough space
290 * will be reserved at the current file location to write a seek head of
293 * @param segment_offset The absolute offset to the position in the file
294 * where the segment begins.
295 * @param numelements The maximum number of elements that will be indexed
296 * by this seek head, 0 if unlimited.
298 static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
300 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
301 if (new_seekhead == NULL)
304 new_seekhead->segment_offset = segment_offset;
306 if (numelements > 0) {
307 new_seekhead->filepos = avio_tell(pb);
308 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
309 // and size, and 3 bytes to guarantee that an EBML void element
310 // will fit afterwards
311 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
312 new_seekhead->max_entries = numelements;
313 put_ebml_void(pb, new_seekhead->reserved_size);
318 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
320 mkv_seekhead_entry *entries = seekhead->entries;
322 // don't store more elements than we reserved space for
323 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
326 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
328 return AVERROR(ENOMEM);
329 seekhead->entries = entries;
331 seekhead->entries[seekhead->num_entries].elementid = elementid;
332 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
338 * Write the seek head to the file and free it. If a maximum number of
339 * elements was specified to mkv_start_seekhead(), the seek head will
340 * be written at the location reserved for it. Otherwise, it is written
341 * at the current location in the file.
343 * @return The file offset where the seekhead was written,
344 * -1 if an error occurred.
346 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
348 ebml_master metaseek, seekentry;
352 currentpos = avio_tell(pb);
354 if (seekhead->reserved_size > 0) {
355 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
361 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
362 for (i = 0; i < seekhead->num_entries; i++) {
363 mkv_seekhead_entry *entry = &seekhead->entries[i];
365 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
367 put_ebml_id(pb, MATROSKA_ID_SEEKID);
368 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
369 put_ebml_id(pb, entry->elementid);
371 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
372 end_ebml_master(pb, seekentry);
374 end_ebml_master(pb, metaseek);
376 if (seekhead->reserved_size > 0) {
377 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
378 put_ebml_void(pb, remaining);
379 avio_seek(pb, currentpos, SEEK_SET);
381 currentpos = seekhead->filepos;
384 av_freep(&seekhead->entries);
390 static mkv_cues * mkv_start_cues(int64_t segment_offset)
392 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
396 cues->segment_offset = segment_offset;
400 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos, int64_t relative_pos,
403 mkv_cuepoint *entries = cues->entries;
408 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
410 return AVERROR(ENOMEM);
411 cues->entries = entries;
413 cues->entries[cues->num_entries].pts = ts;
414 cues->entries[cues->num_entries].tracknum = stream + 1;
415 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
416 cues->entries[cues->num_entries].relative_pos = relative_pos;
417 cues->entries[cues->num_entries++].duration = duration;
422 static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, mkv_track *tracks, int num_tracks)
424 ebml_master cues_element;
428 currentpos = avio_tell(pb);
429 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
431 for (i = 0; i < cues->num_entries; i++) {
432 ebml_master cuepoint, track_positions;
433 mkv_cuepoint *entry = &cues->entries[i];
434 uint64_t pts = entry->pts;
436 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
437 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
439 // put all the entries from different tracks that have the exact same
440 // timestamp into the same CuePoint
441 for (j = 0; j < num_tracks; j++)
442 tracks[j].has_cue = 0;
443 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
444 int tracknum = entry[j].tracknum - 1;
445 av_assert0(tracknum>=0 && tracknum<num_tracks);
446 if (tracks[tracknum].has_cue)
448 tracks[tracknum].has_cue = 1;
449 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
450 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
451 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
452 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
453 if (entry[j].duration != -1)
454 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
455 end_ebml_master(pb, track_positions);
458 end_ebml_master(pb, cuepoint);
460 end_ebml_master(pb, cues_element);
465 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
467 uint8_t *header_start[3];
469 int first_header_size;
472 if (codec->codec_id == AV_CODEC_ID_VORBIS)
473 first_header_size = 30;
475 first_header_size = 42;
477 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
478 first_header_size, header_start, header_len) < 0) {
479 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
483 avio_w8(pb, 2); // number packets - 1
484 for (j = 0; j < 2; j++) {
485 put_xiph_size(pb, header_len[j]);
487 for (j = 0; j < 3; j++)
488 avio_write(pb, header_start[j], header_len[j]);
493 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
495 if (codec->extradata && codec->extradata_size == 2)
496 avio_write(pb, codec->extradata, 2);
498 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
502 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
504 MPEG4AudioConfig mp4ac;
506 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
507 codec->extradata_size * 8, 1) < 0) {
508 av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
512 *sample_rate = mp4ac.sample_rate;
513 *output_sample_rate = mp4ac.ext_sample_rate;
516 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
520 int ret, codecpriv_size;
522 ret = avio_open_dyn_buf(&dyn_cp);
527 if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA)
528 ret = put_xiph_codecpriv(s, dyn_cp, codec);
529 else if (codec->codec_id == AV_CODEC_ID_FLAC)
530 ret = ff_flac_write_header(dyn_cp, codec, 1);
531 else if (codec->codec_id == AV_CODEC_ID_WAVPACK)
532 ret = put_wv_codecpriv(dyn_cp, codec);
533 else if (codec->codec_id == AV_CODEC_ID_H264)
534 ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
535 else if (codec->codec_id == AV_CODEC_ID_ALAC) {
536 if (codec->extradata_size < 36) {
537 av_log(s, AV_LOG_ERROR,
538 "Invalid extradata found, ALAC expects a 36-byte "
540 ret = AVERROR_INVALIDDATA;
542 avio_write(dyn_cp, codec->extradata + 12,
543 codec->extradata_size - 12);
545 else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
546 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
547 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
549 if (!codec->codec_tag)
550 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id);
551 if (codec->extradata_size)
552 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
554 if (!codec->codec_tag)
555 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
556 if (!codec->codec_tag) {
557 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
558 avcodec_get_name(codec->codec_id));
559 ret = AVERROR(EINVAL);
562 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
565 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
567 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
569 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
570 avcodec_get_name(codec->codec_id));
571 ret = AVERROR(EINVAL);
573 if (!codec->codec_tag)
574 codec->codec_tag = tag;
576 ff_put_wav_header(dyn_cp, codec);
579 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
581 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
586 static int mkv_write_tracks(AVFormatContext *s)
588 MatroskaMuxContext *mkv = s->priv_data;
589 AVIOContext *pb = s->pb;
591 int i, j, ret, default_stream_exists = 0;
593 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
594 if (ret < 0) return ret;
596 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
597 for (i = 0; i < s->nb_streams; i++) {
598 AVStream *st = s->streams[i];
599 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
601 for (i = 0; i < s->nb_streams; i++) {
602 AVStream *st = s->streams[i];
603 AVCodecContext *codec = st->codec;
604 ebml_master subinfo, track;
607 int bit_depth = av_get_bits_per_sample(codec->codec_id);
608 int sample_rate = codec->sample_rate;
609 int output_sample_rate = 0;
610 int display_width_div = 1;
611 int display_height_div = 1;
612 AVDictionaryEntry *tag;
614 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
615 mkv->have_attachments = 1;
620 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
622 bit_depth = codec->bits_per_coded_sample;
624 if (codec->codec_id == AV_CODEC_ID_AAC)
625 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
627 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
628 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1);
629 put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1);
630 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
632 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
633 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
634 tag = av_dict_get(st->metadata, "language", NULL, 0);
635 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
636 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
637 } else if (tag && tag->value) {
638 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
641 // The default value for TRACKFLAGDEFAULT is 1, so add element
642 // if we need to clear it.
643 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
644 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
646 if (st->disposition & AV_DISPOSITION_FORCED)
647 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
649 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
650 const char *codec_id;
651 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
652 codec_id = "D_WEBVTT/CAPTIONS";
653 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
654 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
655 codec_id = "D_WEBVTT/DESCRIPTIONS";
656 native_id = MATROSKA_TRACK_TYPE_METADATA;
657 } else if (st->disposition & AV_DISPOSITION_METADATA) {
658 codec_id = "D_WEBVTT/METADATA";
659 native_id = MATROSKA_TRACK_TYPE_METADATA;
661 codec_id = "D_WEBVTT/SUBTITLES";
662 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
664 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
666 // look for a codec ID string specific to mkv to use,
667 // if none are found, use AVI codes
668 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
669 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
670 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
677 if (codec->codec_id == AV_CODEC_ID_OPUS) {
678 uint64_t codec_delay =av_rescale_q(codec->delay,
679 (AVRational){1, codec->sample_rate},
680 (AVRational){1, 1000000000});
681 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codec_delay);
682 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
686 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
687 codec->codec_id == AV_CODEC_ID_VP9 ||
688 ((codec->codec_id == AV_CODEC_ID_OPUS)&&(codec->strict_std_compliance <= FF_COMPLIANCE_EXPERIMENTAL)) ||
689 codec->codec_id == AV_CODEC_ID_VORBIS ||
690 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
691 av_log(s, AV_LOG_ERROR,
692 "Only VP8,VP9 video and Vorbis,Opus(experimental, use -strict -2) audio and WebVTT subtitles are supported for WebM.\n");
693 return AVERROR(EINVAL);
696 switch (codec->codec_type) {
697 case AVMEDIA_TYPE_VIDEO:
698 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
699 if(st->avg_frame_rate.num && st->avg_frame_rate.den && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
700 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9/av_q2d(st->avg_frame_rate));
702 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
705 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
706 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
707 || codec->codec_id == AV_CODEC_ID_SVQ1
708 || codec->codec_id == AV_CODEC_ID_SVQ3
709 || codec->codec_id == AV_CODEC_ID_CINEPAK))
713 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
714 else if (!native_id) {
715 // if there is no mkv-specific codec ID, use VFW mode
716 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
717 mkv->tracks[i].write_dts = 1;
720 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
721 // XXX: interlace flag?
722 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
723 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
725 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
726 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
727 // save stereo mode flag
728 uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
730 for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
731 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
736 if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
737 || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
738 av_log(s, AV_LOG_ERROR,
739 "The specified stereo mode is not valid.\n");
740 return AVERROR(EINVAL);
742 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
749 display_width_div = 2;
755 display_height_div = 2;
760 if ((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) ||
761 (tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) ||
762 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
763 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
766 if (st->sample_aspect_ratio.num) {
767 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
768 if (d_width > INT_MAX) {
769 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
770 return AVERROR(EINVAL);
772 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
773 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
774 } else if (display_width_div != 1 || display_height_div != 1) {
775 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
776 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
779 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
780 uint32_t color_space = av_le2ne32(codec->codec_tag);
781 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
783 end_ebml_master(pb, subinfo);
786 case AVMEDIA_TYPE_AUDIO:
787 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
790 // no mkv-specific ID, use ACM mode
791 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
793 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
794 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
795 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
796 if (output_sample_rate)
797 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
799 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
800 end_ebml_master(pb, subinfo);
803 case AVMEDIA_TYPE_SUBTITLE:
805 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
806 return AVERROR(ENOSYS);
809 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
810 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
812 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
815 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
816 return AVERROR(EINVAL);
819 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
820 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
821 if (ret < 0) return ret;
824 end_ebml_master(pb, track);
826 // ms precision is the de-facto standard timescale for mkv files
827 avpriv_set_pts_info(st, 64, 1, 1000);
829 end_ebml_master(pb, tracks);
833 static int mkv_write_chapters(AVFormatContext *s)
835 MatroskaMuxContext *mkv = s->priv_data;
836 AVIOContext *pb = s->pb;
837 ebml_master chapters, editionentry;
838 AVRational scale = {1, 1E9};
841 if (!s->nb_chapters || mkv->wrote_chapters)
844 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
845 if (ret < 0) return ret;
847 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
848 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
849 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
850 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
851 for (i = 0; i < s->nb_chapters; i++) {
852 ebml_master chapteratom, chapterdisplay;
853 AVChapter *c = s->chapters[i];
854 AVDictionaryEntry *t = NULL;
856 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
857 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
858 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
859 av_rescale_q(c->start, c->time_base, scale));
860 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
861 av_rescale_q(c->end, c->time_base, scale));
862 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
863 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
864 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
865 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
866 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
867 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
868 end_ebml_master(pb, chapterdisplay);
870 end_ebml_master(pb, chapteratom);
872 end_ebml_master(pb, editionentry);
873 end_ebml_master(pb, chapters);
875 mkv->wrote_chapters = 1;
879 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
881 uint8_t *key = av_strdup(t->key);
883 const uint8_t *lang = NULL;
886 if ((p = strrchr(p, '-')) &&
887 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
894 else if (*p >= 'a' && *p <= 'z')
899 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
900 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
902 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
903 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
904 end_ebml_master(pb, tag);
909 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
910 unsigned int uid, ebml_master *tags)
912 MatroskaMuxContext *mkv = s->priv_data;
913 ebml_master tag, targets;
914 AVDictionaryEntry *t = NULL;
918 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
919 if (ret < 0) return ret;
921 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
924 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
925 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
927 put_ebml_uint(s->pb, elementid, uid);
928 end_ebml_master(s->pb, targets);
930 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
931 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
932 mkv_write_simpletag(s->pb, t);
934 end_ebml_master(s->pb, tag);
938 static int mkv_check_tag(AVDictionary *m)
940 AVDictionaryEntry *t = NULL;
942 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
943 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
949 static int mkv_write_tags(AVFormatContext *s)
951 MatroskaMuxContext *mkv = s->priv_data;
952 ebml_master tags = {0};
955 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
957 if (mkv_check_tag(s->metadata)) {
958 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
959 if (ret < 0) return ret;
962 for (i = 0; i < s->nb_streams; i++) {
963 AVStream *st = s->streams[i];
965 if (!mkv_check_tag(st->metadata))
968 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
969 if (ret < 0) return ret;
972 for (i = 0; i < s->nb_chapters; i++) {
973 AVChapter *ch = s->chapters[i];
975 if (!mkv_check_tag(ch->metadata))
978 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
979 if (ret < 0) return ret;
983 end_ebml_master(s->pb, tags);
987 static int mkv_write_attachments(AVFormatContext *s)
989 MatroskaMuxContext *mkv = s->priv_data;
990 AVIOContext *pb = s->pb;
991 ebml_master attachments;
995 if (!mkv->have_attachments)
998 av_lfg_init(&c, av_get_random_seed());
1000 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1001 if (ret < 0) return ret;
1003 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1005 for (i = 0; i < s->nb_streams; i++) {
1006 AVStream *st = s->streams[i];
1007 ebml_master attached_file;
1008 AVDictionaryEntry *t;
1009 const char *mimetype = NULL;
1012 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1015 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1017 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1018 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1019 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1020 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1021 return AVERROR(EINVAL);
1023 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1024 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1025 mimetype = t->value;
1026 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1028 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1029 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1030 mimetype = ff_mkv_mime_tags[i].str;
1035 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1036 "it cannot be deduced from the codec id.\n", i);
1037 return AVERROR(EINVAL);
1040 if (st->codec->flags & CODEC_FLAG_BITEXACT) {
1041 struct AVSHA *sha = av_sha_alloc();
1044 return AVERROR(ENOMEM);
1045 av_sha_init(sha, 160);
1046 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1047 av_sha_final(sha, digest);
1049 fileuid = AV_RL64(digest);
1051 fileuid = av_lfg_get(&c);
1053 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1056 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1057 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1058 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1059 end_ebml_master(pb, attached_file);
1061 end_ebml_master(pb, attachments);
1066 static int mkv_write_header(AVFormatContext *s)
1068 MatroskaMuxContext *mkv = s->priv_data;
1069 AVIOContext *pb = s->pb;
1070 ebml_master ebml_header, segment_info;
1071 AVDictionaryEntry *tag;
1074 if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
1075 else mkv->mode = MODE_MATROSKAv2;
1077 if (s->avoid_negative_ts < 0)
1078 s->avoid_negative_ts = 1;
1080 for (i = 0; i < s->nb_streams; i++)
1081 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1082 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1083 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1084 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1085 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1086 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1087 av_log(s, AV_LOG_ERROR,
1088 "The Matroska muxer does not yet support muxing %s\n",
1089 avcodec_get_name(s->streams[i]->codec->codec_id));
1090 return AVERROR_PATCHWELCOME;
1093 mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
1095 return AVERROR(ENOMEM);
1097 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1098 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1099 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1100 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1101 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1102 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1103 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , 4);
1104 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1105 end_ebml_master(pb, ebml_header);
1107 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1108 mkv->segment_offset = avio_tell(pb);
1110 // we write 2 seek heads - one at the end of the file to point to each
1111 // cluster, and one at the beginning to point to all other level one
1112 // elements (including the seek head at the end of the file), which
1113 // isn't more than 10 elements if we only write one of each other
1114 // currently defined level 1 element
1115 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1116 if (!mkv->main_seekhead)
1117 return AVERROR(ENOMEM);
1119 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1120 if (ret < 0) return ret;
1122 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1123 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1124 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1125 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1126 if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
1127 uint32_t segment_uid[4];
1130 av_lfg_init(&lfg, av_get_random_seed());
1132 for (i = 0; i < 4; i++)
1133 segment_uid[i] = av_lfg_get(&lfg);
1135 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
1136 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1137 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1139 const char *ident = "Lavf";
1140 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1141 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1144 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1145 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1146 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1147 uint8_t date_utc_buf[8];
1148 AV_WB64(date_utc_buf, date_utc);
1149 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1152 // reserve space for the duration
1154 mkv->duration_offset = avio_tell(pb);
1155 put_ebml_void(pb, 11); // assumes double-precision float to be written
1156 end_ebml_master(pb, segment_info);
1158 ret = mkv_write_tracks(s);
1159 if (ret < 0) return ret;
1161 for (i = 0; i < s->nb_chapters; i++)
1162 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1164 if (mkv->mode != MODE_WEBM) {
1165 ret = mkv_write_chapters(s);
1166 if (ret < 0) return ret;
1168 ret = mkv_write_tags(s);
1169 if (ret < 0) return ret;
1171 ret = mkv_write_attachments(s);
1172 if (ret < 0) return ret;
1175 if (!s->pb->seekable)
1176 mkv_write_seekhead(pb, mkv->main_seekhead);
1178 mkv->cues = mkv_start_cues(mkv->segment_offset);
1179 if (mkv->cues == NULL)
1180 return AVERROR(ENOMEM);
1182 if (pb->seekable && mkv->reserve_cues_space) {
1183 mkv->cues_pos = avio_tell(pb);
1184 put_ebml_void(pb, mkv->reserve_cues_space);
1187 av_init_packet(&mkv->cur_audio_pkt);
1188 mkv->cur_audio_pkt.size = 0;
1189 mkv->cluster_pos = -1;
1193 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1194 // after 4k and on a keyframe
1196 if (mkv->cluster_time_limit < 0)
1197 mkv->cluster_time_limit = 5000;
1198 if (mkv->cluster_size_limit < 0)
1199 mkv->cluster_size_limit = 5 * 1024 * 1024;
1201 if (mkv->cluster_time_limit < 0)
1202 mkv->cluster_time_limit = 1000;
1203 if (mkv->cluster_size_limit < 0)
1204 mkv->cluster_size_limit = 32 * 1024;
1210 static int mkv_blockgroup_size(int pkt_size)
1212 int size = pkt_size + 4;
1213 size += ebml_num_size(size);
1214 size += 2; // EBML ID for block and block duration
1215 size += 8; // max size of block duration
1216 size += ebml_num_size(size);
1217 size += 1; // blockgroup EBML ID
1221 static int ass_get_duration(const uint8_t *p)
1223 int sh, sm, ss, sc, eh, em, es, ec;
1224 uint64_t start, end;
1226 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1227 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1229 start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc;
1230 end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec;
1235 static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1237 MatroskaMuxContext *mkv = s->priv_data;
1238 int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
1239 uint8_t *start, *end, *data = pkt->data;
1240 ebml_master blockgroup;
1244 int duration = ass_get_duration(data);
1245 max_duration = FFMAX(duration, max_duration);
1246 end = memchr(data, '\n', data_size);
1247 size = line_size = end ? end-data+1 : data_size;
1248 size -= end ? (end[-1]=='\r')+1 : 0;
1250 for (i=0; i<3; i++, start++)
1251 if (!(start = memchr(start, ',', size-(start-data))))
1252 return max_duration;
1253 size -= start - data;
1254 sscanf(data, "Dialogue: %d,", &layer);
1255 i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
1256 s->streams[pkt->stream_index]->nb_frames, layer);
1257 size = FFMIN(i+size, sizeof(buffer));
1258 memcpy(buffer+i, start, size-i);
1260 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1261 "pts %" PRId64 ", duration %d\n",
1262 avio_tell(pb), size, pkt->pts, duration);
1263 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1264 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1265 put_ebml_num(pb, size+4, 0);
1266 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1267 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1269 avio_write(pb, buffer, size);
1270 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1271 end_ebml_master(pb, blockgroup);
1274 data_size -= line_size;
1277 return max_duration;
1281 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1288 dst = av_malloc(srclen);
1290 return AVERROR(ENOMEM);
1292 while (srclen >= WV_HEADER_SIZE) {
1295 ret = ff_wv_parse_header(&header, src);
1298 src += WV_HEADER_SIZE;
1299 srclen -= WV_HEADER_SIZE;
1301 if (srclen < header.blocksize) {
1302 ret = AVERROR_INVALIDDATA;
1306 if (header.initial) {
1307 AV_WL32(dst + offset, header.samples);
1310 AV_WL32(dst + offset, header.flags);
1311 AV_WL32(dst + offset + 4, header.crc);
1314 if (!(header.initial && header.final)) {
1315 AV_WL32(dst + offset, header.blocksize);
1319 memcpy(dst + offset, src, header.blocksize);
1320 src += header.blocksize;
1321 srclen -= header.blocksize;
1322 offset += header.blocksize;
1334 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1335 unsigned int blockid, AVPacket *pkt, int flags)
1337 MatroskaMuxContext *mkv = s->priv_data;
1338 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1339 uint8_t *data = NULL, *side_data = NULL;
1340 int offset = 0, size = pkt->size, side_data_size = 0;
1341 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1342 uint64_t additional_id = 0;
1343 int64_t discard_padding = 0;
1344 ebml_master block_group, block_additions, block_more;
1346 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1347 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1348 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1349 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1350 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1351 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1352 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1353 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1355 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1361 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1362 /* Matroska specification requires to remove the first QuickTime atom
1368 side_data = av_packet_get_side_data(pkt,
1369 AV_PKT_DATA_SKIP_SAMPLES,
1372 if (side_data && side_data_size >= 10) {
1373 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1374 (AVRational){1, codec->sample_rate},
1375 (AVRational){1, 1000000000});
1378 side_data = av_packet_get_side_data(pkt,
1379 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1382 additional_id = AV_RB64(side_data);
1384 side_data_size -= 8;
1387 if ((side_data_size && additional_id == 1) || discard_padding) {
1388 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1389 blockid = MATROSKA_ID_BLOCK;
1392 put_ebml_id(pb, blockid);
1393 put_ebml_num(pb, size+4, 0);
1394 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1395 avio_wb16(pb, ts - mkv->cluster_pts);
1397 avio_write(pb, data + offset, size);
1398 if (data != pkt->data)
1401 if (discard_padding) {
1402 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1405 if (side_data_size && additional_id == 1) {
1406 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1407 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1408 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1409 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1410 put_ebml_num(pb, side_data_size, 0);
1411 avio_write(pb, side_data, side_data_size);
1412 end_ebml_master(pb, block_more);
1413 end_ebml_master(pb, block_additions);
1415 if ((side_data_size && additional_id == 1) || discard_padding) {
1416 end_ebml_master(pb, block_group);
1420 static int srt_get_duration(uint8_t **buf)
1422 int i, duration = 0;
1424 for (i=0; i<2 && !duration; i++) {
1425 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1426 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1427 &s_hour, &s_min, &s_sec, &s_hsec,
1428 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1429 s_min += 60*s_hour; e_min += 60*e_hour;
1430 s_sec += 60*s_min; e_sec += 60*e_min;
1431 s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
1432 duration = e_hsec - s_hsec;
1434 *buf += ff_subtitles_next_line(*buf);
1439 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1441 ebml_master blockgroup;
1442 AVPacket pkt2 = *pkt;
1443 int64_t duration = srt_get_duration(&pkt2.data);
1444 pkt2.size -= pkt2.data - pkt->data;
1446 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1447 mkv_blockgroup_size(pkt2.size));
1448 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1449 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1450 end_ebml_master(pb, blockgroup);
1455 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1457 MatroskaMuxContext *mkv = s->priv_data;
1458 ebml_master blockgroup;
1459 int id_size, settings_size, size;
1460 uint8_t *id, *settings;
1461 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1462 const int flags = 0;
1465 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1469 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1472 size = id_size + 1 + settings_size + 1 + pkt->size;
1474 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1475 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1476 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1478 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1480 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1481 put_ebml_num(pb, size+4, 0);
1482 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1483 avio_wb16(pb, ts - mkv->cluster_pts);
1485 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1487 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1488 end_ebml_master(pb, blockgroup);
1490 return pkt->duration;
1493 static void mkv_flush_dynbuf(AVFormatContext *s)
1495 MatroskaMuxContext *mkv = s->priv_data;
1502 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1503 avio_write(s->pb, dyn_buf, bufsize);
1508 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1510 MatroskaMuxContext *mkv = s->priv_data;
1511 AVIOContext *pb = s->pb;
1512 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1513 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1514 int duration = pkt->duration;
1516 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1517 int64_t relative_packet_pos;
1519 if (ts == AV_NOPTS_VALUE) {
1520 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1521 return AVERROR(EINVAL);
1524 if (!s->pb->seekable) {
1526 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1527 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1534 if (mkv->cluster_pos == -1) {
1535 mkv->cluster_pos = avio_tell(s->pb);
1536 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1537 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1538 mkv->cluster_pts = FFMAX(0, ts);
1541 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1543 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1544 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1546 } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1547 duration = mkv_write_ass_blocks(s, pb, pkt);
1549 } else if (codec->codec_id == AV_CODEC_ID_SRT) {
1550 duration = mkv_write_srt_blocks(s, pb, pkt);
1551 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1552 duration = mkv_write_vtt_blocks(s, pb, pkt);
1554 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
1555 /* For backward compatibility, prefer convergence_duration. */
1556 if (pkt->convergence_duration > 0) {
1557 duration = pkt->convergence_duration;
1559 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1560 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1561 end_ebml_master(pb, blockgroup);
1564 if ((codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) || codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1565 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos, relative_packet_pos,
1566 codec->codec_type == AVMEDIA_TYPE_SUBTITLE ? duration : -1);
1567 if (ret < 0) return ret;
1570 mkv->duration = FFMAX(mkv->duration, ts + duration);
1574 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1576 MatroskaMuxContext *mkv = s->priv_data;
1577 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1578 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1580 int64_t cluster_time;
1584 if (mkv->tracks[pkt->stream_index].write_dts)
1585 cluster_time = pkt->dts - mkv->cluster_pts;
1587 cluster_time = pkt->pts - mkv->cluster_pts;
1589 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1590 // after 4k and on a keyframe
1591 if (s->pb->seekable) {
1593 cluster_size = avio_tell(pb) - mkv->cluster_pos;
1596 cluster_size = avio_tell(pb);
1599 if (mkv->cluster_pos != -1 &&
1600 (cluster_size > mkv->cluster_size_limit ||
1601 cluster_time > mkv->cluster_time_limit ||
1602 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1603 cluster_size > 4 * 1024))) {
1604 av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
1605 " bytes, pts %" PRIu64 "dts %" PRIu64 "\n",
1606 avio_tell(pb), pkt->pts, pkt->dts);
1607 end_ebml_master(pb, mkv->cluster);
1608 mkv->cluster_pos = -1;
1610 mkv_flush_dynbuf(s);
1614 // check if we have an audio packet cached
1615 if (mkv->cur_audio_pkt.size > 0) {
1616 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1617 av_free_packet(&mkv->cur_audio_pkt);
1619 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1624 // buffer an audio packet to ensure the packet containing the video
1625 // keyframe's timecode is contained in the same cluster for WebM
1626 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1627 mkv->cur_audio_pkt = *pkt;
1629 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1630 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1632 ret = av_dup_packet(&mkv->cur_audio_pkt);
1633 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1634 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1637 ret = mkv_write_packet_internal(s, pkt);
1641 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1643 MatroskaMuxContext *mkv = s->priv_data;
1645 if (s->pb->seekable)
1650 if (mkv->cluster_pos != -1) {
1651 av_log(s, AV_LOG_DEBUG, "Flushing cluster at offset %" PRIu64
1652 " bytes\n", avio_tell(pb));
1653 end_ebml_master(pb, mkv->cluster);
1654 mkv->cluster_pos = -1;
1656 mkv_flush_dynbuf(s);
1661 return mkv_write_packet(s, pkt);
1664 static int mkv_write_trailer(AVFormatContext *s)
1666 MatroskaMuxContext *mkv = s->priv_data;
1667 AVIOContext *pb = s->pb;
1668 int64_t currentpos, cuespos;
1671 // check if we have an audio packet cached
1672 if (mkv->cur_audio_pkt.size > 0) {
1673 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1674 av_free_packet(&mkv->cur_audio_pkt);
1676 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1682 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1683 mkv_flush_dynbuf(s);
1684 } else if (mkv->cluster_pos != -1) {
1685 end_ebml_master(pb, mkv->cluster);
1688 if (mkv->mode != MODE_WEBM) {
1689 ret = mkv_write_chapters(s);
1690 if (ret < 0) return ret;
1694 if (mkv->cues->num_entries) {
1695 if (mkv->reserve_cues_space) {
1698 currentpos = avio_tell(pb);
1699 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1701 cuespos = mkv_write_cues(pb, mkv->cues, mkv->tracks, s->nb_streams);
1702 cues_end = avio_tell(pb);
1703 if (cues_end > cuespos + mkv->reserve_cues_space) {
1704 av_log(s, AV_LOG_ERROR, "Insufficient space reserved for cues: %d "
1705 "(needed: %"PRId64").\n", mkv->reserve_cues_space,
1706 cues_end - cuespos);
1707 return AVERROR(EINVAL);
1710 if (cues_end < cuespos + mkv->reserve_cues_space)
1711 put_ebml_void(pb, mkv->reserve_cues_space - (cues_end - cuespos));
1713 avio_seek(pb, currentpos, SEEK_SET);
1715 cuespos = mkv_write_cues(pb, mkv->cues, mkv->tracks, s->nb_streams);
1718 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
1719 if (ret < 0) return ret;
1722 mkv_write_seekhead(pb, mkv->main_seekhead);
1724 // update the duration
1725 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1726 currentpos = avio_tell(pb);
1727 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1728 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1730 avio_seek(pb, currentpos, SEEK_SET);
1733 end_ebml_master(pb, mkv->segment);
1734 av_freep(&mkv->tracks);
1735 av_freep(&mkv->cues->entries);
1736 av_freep(&mkv->cues);
1741 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1744 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1745 if (ff_mkv_codec_tags[i].id == codec_id)
1748 if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
1749 enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
1750 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1757 static const AVCodecTag additional_audio_tags[] = {
1758 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1759 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1760 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1761 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1762 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1763 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1764 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1765 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1766 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1767 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1768 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1769 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1770 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1773 static const AVCodecTag additional_video_tags[] = {
1774 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1775 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1776 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1777 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1778 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1779 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1782 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
1783 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
1784 static const AVOption options[] = {
1785 { "reserve_index_space", "Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues).", OFFSET(reserve_cues_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
1786 { "cluster_size_limit", "Store at most the provided amount of bytes in a cluster. ", OFFSET(cluster_size_limit), AV_OPT_TYPE_INT , { .i64 = -1 }, -1, INT_MAX, FLAGS },
1787 { "cluster_time_limit", "Store at most the provided number of milliseconds in a cluster.", OFFSET(cluster_time_limit), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS },
1791 #if CONFIG_MATROSKA_MUXER
1792 static const AVClass matroska_class = {
1793 .class_name = "matroska muxer",
1794 .item_name = av_default_item_name,
1796 .version = LIBAVUTIL_VERSION_INT,
1799 AVOutputFormat ff_matroska_muxer = {
1801 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1802 .mime_type = "video/x-matroska",
1803 .extensions = "mkv",
1804 .priv_data_size = sizeof(MatroskaMuxContext),
1805 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1806 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1807 .video_codec = CONFIG_LIBX264_ENCODER ?
1808 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
1809 .write_header = mkv_write_header,
1810 .write_packet = mkv_write_flush_packet,
1811 .write_trailer = mkv_write_trailer,
1812 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1813 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1814 .codec_tag = (const AVCodecTag* const []){
1815 ff_codec_bmp_tags, ff_codec_wav_tags,
1816 additional_audio_tags, additional_video_tags, 0
1819 .subtitle_codec = AV_CODEC_ID_SSA,
1821 .subtitle_codec = AV_CODEC_ID_ASS,
1823 .query_codec = mkv_query_codec,
1824 .priv_class = &matroska_class,
1828 #if CONFIG_WEBM_MUXER
1829 static const AVClass webm_class = {
1830 .class_name = "webm muxer",
1831 .item_name = av_default_item_name,
1833 .version = LIBAVUTIL_VERSION_INT,
1836 AVOutputFormat ff_webm_muxer = {
1838 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
1839 .mime_type = "video/webm",
1840 .extensions = "webm",
1841 .priv_data_size = sizeof(MatroskaMuxContext),
1842 .audio_codec = AV_CODEC_ID_VORBIS,
1843 .video_codec = AV_CODEC_ID_VP8,
1844 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1845 .write_header = mkv_write_header,
1846 .write_packet = mkv_write_flush_packet,
1847 .write_trailer = mkv_write_trailer,
1848 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1849 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1850 .priv_class = &webm_class,
1854 #if CONFIG_MATROSKA_AUDIO_MUXER
1855 static const AVClass mka_class = {
1856 .class_name = "matroska audio muxer",
1857 .item_name = av_default_item_name,
1859 .version = LIBAVUTIL_VERSION_INT,
1861 AVOutputFormat ff_matroska_audio_muxer = {
1863 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
1864 .mime_type = "audio/x-matroska",
1865 .extensions = "mka",
1866 .priv_data_size = sizeof(MatroskaMuxContext),
1867 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1868 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1869 .video_codec = AV_CODEC_ID_NONE,
1870 .write_header = mkv_write_header,
1871 .write_packet = mkv_write_flush_packet,
1872 .write_trailer = mkv_write_trailer,
1873 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
1875 .codec_tag = (const AVCodecTag* const []){
1876 ff_codec_wav_tags, additional_audio_tags, 0
1878 .priv_class = &mka_class,