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
24 #include "avio_internal.h"
25 #include "avlanguage.h"
31 #include "subtitles.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/intfloat.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/lfg.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/random_seed.h"
42 #include "libavutil/samplefmt.h"
43 #include "libavutil/sha.h"
45 #include "libavcodec/xiph.h"
46 #include "libavcodec/mpeg4audio.h"
47 #include "libavcodec/internal.h"
49 typedef struct ebml_master {
50 int64_t pos; ///< absolute offset in the file where the master's elements start
51 int sizebytes; ///< how many bytes were reserved for the size
54 typedef struct mkv_seekhead_entry {
55 unsigned int elementid;
59 typedef struct mkv_seekhead {
61 int64_t segment_offset; ///< the file offset to the beginning of the segment
62 int reserved_size; ///< -1 if appending to file
64 mkv_seekhead_entry *entries;
71 int64_t cluster_pos; ///< file offset of the cluster containing the block
72 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
73 int64_t duration; ///< duration of the block according to time base
77 int64_t segment_offset;
78 mkv_cuepoint *entries;
87 #define MODE_MATROSKAv2 0x01
88 #define MODE_WEBM 0x02
90 typedef struct MatroskaMuxContext {
95 int64_t segment_offset;
97 int64_t cluster_pos; ///< file offset of the current cluster
99 int64_t duration_offset;
101 mkv_seekhead *main_seekhead;
105 AVPacket cur_audio_pkt;
107 int have_attachments;
109 int reserve_cues_space;
110 int cluster_size_limit;
112 int64_t cluster_time_limit;
114 uint32_t chapter_id_offset;
116 } MatroskaMuxContext;
119 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
120 * offset, 4 bytes for target EBML ID */
121 #define MAX_SEEKENTRY_SIZE 21
123 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
125 #define MAX_CUETRACKPOS_SIZE 42
127 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
128 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
130 /** Seek preroll value for opus */
131 #define OPUS_SEEK_PREROLL 80000000
134 static int ebml_id_size(unsigned int id)
136 return (av_log2(id+1)-1)/7+1;
139 static void put_ebml_id(AVIOContext *pb, unsigned int id)
141 int i = ebml_id_size(id);
143 avio_w8(pb, (uint8_t)(id >> (i*8)));
147 * Write an EBML size meaning "unknown size".
149 * @param bytes The number of bytes the size should occupy (maximum: 8).
151 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
153 av_assert0(bytes <= 8);
154 avio_w8(pb, 0x1ff >> bytes);
155 ffio_fill(pb, 0xff, bytes - 1);
159 * Calculate how many bytes are needed to represent a given number in EBML.
161 static int ebml_num_size(uint64_t num)
164 while ((num+1) >> bytes*7) bytes++;
169 * Write a number in EBML variable length format.
171 * @param bytes The number of bytes that need to be used to write the number.
172 * If zero, any number of bytes can be used.
174 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
176 int i, needed_bytes = ebml_num_size(num);
178 // sizes larger than this are currently undefined in EBML
179 av_assert0(num < (1ULL<<56)-1);
182 // don't care how many bytes are used, so use the min
183 bytes = needed_bytes;
184 // the bytes needed to write the given size would exceed the bytes
185 // that we need to use, so write unknown size. This shouldn't happen.
186 av_assert0(bytes >= needed_bytes);
188 num |= 1ULL << bytes*7;
189 for (i = bytes - 1; i >= 0; i--)
190 avio_w8(pb, (uint8_t)(num >> i*8));
193 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
197 while (tmp>>=8) bytes++;
199 put_ebml_id(pb, elementid);
200 put_ebml_num(pb, bytes, 0);
201 for (i = bytes - 1; i >= 0; i--)
202 avio_w8(pb, (uint8_t)(val >> i*8));
205 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
208 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
210 while (tmp>>=8) bytes++;
212 put_ebml_id(pb, elementid);
213 put_ebml_num(pb, bytes, 0);
214 for (i = bytes - 1; i >= 0; i--)
215 avio_w8(pb, (uint8_t)(val >> i*8));
218 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
220 put_ebml_id(pb, elementid);
221 put_ebml_num(pb, 8, 0);
222 avio_wb64(pb, av_double2int(val));
225 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
226 const void *buf, int size)
228 put_ebml_id(pb, elementid);
229 put_ebml_num(pb, size, 0);
230 avio_write(pb, buf, size);
233 static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
235 put_ebml_binary(pb, elementid, str, strlen(str));
239 * Write a void element of a given size. Useful for reserving space in
240 * the file to be written to later.
242 * @param size The number of bytes to reserve, which must be at least 2.
244 static void put_ebml_void(AVIOContext *pb, uint64_t size)
246 int64_t currentpos = avio_tell(pb);
248 av_assert0(size >= 2);
250 put_ebml_id(pb, EBML_ID_VOID);
251 // we need to subtract the length needed to store the size from the
252 // size we need to reserve so 2 cases, we use 8 bytes to store the
253 // size if possible, 1 byte otherwise
255 put_ebml_num(pb, size-1, 0);
257 put_ebml_num(pb, size-9, 8);
258 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
261 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
263 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
264 put_ebml_id(pb, elementid);
265 put_ebml_size_unknown(pb, bytes);
266 return (ebml_master){ avio_tell(pb), bytes };
269 static void end_ebml_master(AVIOContext *pb, ebml_master master)
271 int64_t pos = avio_tell(pb);
273 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
275 put_ebml_num(pb, pos - master.pos, master.sizebytes);
276 avio_seek(pb, pos, SEEK_SET);
279 static void put_xiph_size(AVIOContext *pb, int size)
281 ffio_fill(pb, 255, size / 255);
282 avio_w8(pb, size % 255);
286 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
287 * elements. If a maximum number of elements is specified, enough space
288 * will be reserved at the current file location to write a seek head of
291 * @param segment_offset The absolute offset to the position in the file
292 * where the segment begins.
293 * @param numelements The maximum number of elements that will be indexed
294 * by this seek head, 0 if unlimited.
296 static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
298 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
299 if (new_seekhead == NULL)
302 new_seekhead->segment_offset = segment_offset;
304 if (numelements > 0) {
305 new_seekhead->filepos = avio_tell(pb);
306 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
307 // and size, and 3 bytes to guarantee that an EBML void element
308 // will fit afterwards
309 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
310 new_seekhead->max_entries = numelements;
311 put_ebml_void(pb, new_seekhead->reserved_size);
316 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
318 mkv_seekhead_entry *entries = seekhead->entries;
320 // don't store more elements than we reserved space for
321 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
324 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
326 return AVERROR(ENOMEM);
327 seekhead->entries = entries;
329 seekhead->entries[seekhead->num_entries].elementid = elementid;
330 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
336 * Write the seek head to the file and free it. If a maximum number of
337 * elements was specified to mkv_start_seekhead(), the seek head will
338 * be written at the location reserved for it. Otherwise, it is written
339 * at the current location in the file.
341 * @return The file offset where the seekhead was written,
342 * -1 if an error occurred.
344 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
346 ebml_master metaseek, seekentry;
350 currentpos = avio_tell(pb);
352 if (seekhead->reserved_size > 0) {
353 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
359 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
360 for (i = 0; i < seekhead->num_entries; i++) {
361 mkv_seekhead_entry *entry = &seekhead->entries[i];
363 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
365 put_ebml_id(pb, MATROSKA_ID_SEEKID);
366 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
367 put_ebml_id(pb, entry->elementid);
369 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
370 end_ebml_master(pb, seekentry);
372 end_ebml_master(pb, metaseek);
374 if (seekhead->reserved_size > 0) {
375 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
376 put_ebml_void(pb, remaining);
377 avio_seek(pb, currentpos, SEEK_SET);
379 currentpos = seekhead->filepos;
382 av_freep(&seekhead->entries);
388 static mkv_cues * mkv_start_cues(int64_t segment_offset)
390 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
394 cues->segment_offset = segment_offset;
398 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos, int64_t relative_pos,
401 mkv_cuepoint *entries = cues->entries;
406 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
408 return AVERROR(ENOMEM);
409 cues->entries = entries;
411 cues->entries[cues->num_entries].pts = ts;
412 cues->entries[cues->num_entries].tracknum = stream + 1;
413 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
414 cues->entries[cues->num_entries].relative_pos = relative_pos;
415 cues->entries[cues->num_entries++].duration = duration;
420 static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, mkv_track *tracks, int num_tracks)
422 ebml_master cues_element;
426 currentpos = avio_tell(pb);
427 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
429 for (i = 0; i < cues->num_entries; i++) {
430 ebml_master cuepoint, track_positions;
431 mkv_cuepoint *entry = &cues->entries[i];
432 uint64_t pts = entry->pts;
434 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
435 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
437 // put all the entries from different tracks that have the exact same
438 // timestamp into the same CuePoint
439 for (j = 0; j < num_tracks; j++)
440 tracks[j].has_cue = 0;
441 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
442 int tracknum = entry[j].tracknum - 1;
443 av_assert0(tracknum>=0 && tracknum<num_tracks);
444 if (tracks[tracknum].has_cue)
446 tracks[tracknum].has_cue = 1;
447 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
448 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
449 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
450 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
451 if (entry[j].duration != -1)
452 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
453 end_ebml_master(pb, track_positions);
456 end_ebml_master(pb, cuepoint);
458 end_ebml_master(pb, cues_element);
463 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
465 uint8_t *header_start[3];
467 int first_header_size;
470 if (codec->codec_id == AV_CODEC_ID_VORBIS)
471 first_header_size = 30;
473 first_header_size = 42;
475 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
476 first_header_size, header_start, header_len) < 0) {
477 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
481 avio_w8(pb, 2); // number packets - 1
482 for (j = 0; j < 2; j++) {
483 put_xiph_size(pb, header_len[j]);
485 for (j = 0; j < 3; j++)
486 avio_write(pb, header_start[j], header_len[j]);
491 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
493 if (codec->extradata && codec->extradata_size == 2)
494 avio_write(pb, codec->extradata, 2);
496 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
500 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
502 MPEG4AudioConfig mp4ac;
504 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
505 codec->extradata_size * 8, 1) < 0) {
506 av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
510 *sample_rate = mp4ac.sample_rate;
511 *output_sample_rate = mp4ac.ext_sample_rate;
514 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
518 int ret, codecpriv_size;
520 ret = avio_open_dyn_buf(&dyn_cp);
525 if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA)
526 ret = put_xiph_codecpriv(s, dyn_cp, codec);
527 else if (codec->codec_id == AV_CODEC_ID_FLAC)
528 ret = ff_flac_write_header(dyn_cp, codec, 1);
529 else if (codec->codec_id == AV_CODEC_ID_WAVPACK)
530 ret = put_wv_codecpriv(dyn_cp, codec);
531 else if (codec->codec_id == AV_CODEC_ID_H264)
532 ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
533 else if (codec->codec_id == AV_CODEC_ID_ALAC) {
534 if (codec->extradata_size < 36) {
535 av_log(s, AV_LOG_ERROR,
536 "Invalid extradata found, ALAC expects a 36-byte "
538 ret = AVERROR_INVALIDDATA;
540 avio_write(dyn_cp, codec->extradata + 12,
541 codec->extradata_size - 12);
543 else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
544 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
545 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
547 if (!codec->codec_tag)
548 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id);
549 if (codec->extradata_size)
550 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
552 if (!codec->codec_tag)
553 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
554 if (!codec->codec_tag) {
555 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
556 avcodec_get_name(codec->codec_id));
557 ret = AVERROR(EINVAL);
560 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
563 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
565 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
567 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
568 avcodec_get_name(codec->codec_id));
569 ret = AVERROR(EINVAL);
571 if (!codec->codec_tag)
572 codec->codec_tag = tag;
574 ff_put_wav_header(dyn_cp, codec);
577 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
579 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
584 static int mkv_write_tracks(AVFormatContext *s)
586 MatroskaMuxContext *mkv = s->priv_data;
587 AVIOContext *pb = s->pb;
589 int i, j, ret, default_stream_exists = 0;
591 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
592 if (ret < 0) return ret;
594 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
595 for (i = 0; i < s->nb_streams; i++) {
596 AVStream *st = s->streams[i];
597 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
599 for (i = 0; i < s->nb_streams; i++) {
600 AVStream *st = s->streams[i];
601 AVCodecContext *codec = st->codec;
602 ebml_master subinfo, track;
605 int bit_depth = av_get_bits_per_sample(codec->codec_id);
606 int sample_rate = codec->sample_rate;
607 int output_sample_rate = 0;
608 int display_width_div = 1;
609 int display_height_div = 1;
610 AVDictionaryEntry *tag;
612 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
613 mkv->have_attachments = 1;
618 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
620 bit_depth = codec->bits_per_coded_sample;
622 if (codec->codec_id == AV_CODEC_ID_AAC)
623 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
625 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
626 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1);
627 put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1);
628 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
630 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
631 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
632 tag = av_dict_get(st->metadata, "language", NULL, 0);
633 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
634 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
635 } else if (tag && tag->value) {
636 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
639 // The default value for TRACKFLAGDEFAULT is 1, so add element
640 // if we need to clear it.
641 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
642 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
644 if (st->disposition & AV_DISPOSITION_FORCED)
645 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
647 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
648 const char *codec_id;
649 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
650 codec_id = "D_WEBVTT/CAPTIONS";
651 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
652 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
653 codec_id = "D_WEBVTT/DESCRIPTIONS";
654 native_id = MATROSKA_TRACK_TYPE_METADATA;
655 } else if (st->disposition & AV_DISPOSITION_METADATA) {
656 codec_id = "D_WEBVTT/METADATA";
657 native_id = MATROSKA_TRACK_TYPE_METADATA;
659 codec_id = "D_WEBVTT/SUBTITLES";
660 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
662 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
664 // look for a codec ID string specific to mkv to use,
665 // if none are found, use AVI codes
666 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
667 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
668 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
675 if (codec->codec_id == AV_CODEC_ID_OPUS) {
676 uint64_t codec_delay =av_rescale_q(codec->delay,
677 (AVRational){1, codec->sample_rate},
678 (AVRational){1, 1000000000});
679 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codec_delay);
680 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
684 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
685 codec->codec_id == AV_CODEC_ID_VP9 ||
686 ((codec->codec_id == AV_CODEC_ID_OPUS)&&(codec->strict_std_compliance <= FF_COMPLIANCE_EXPERIMENTAL)) ||
687 codec->codec_id == AV_CODEC_ID_VORBIS ||
688 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
689 av_log(s, AV_LOG_ERROR,
690 "Only VP8,VP9 video and Vorbis,Opus(experimental, use -strict -2) audio and WebVTT subtitles are supported for WebM.\n");
691 return AVERROR(EINVAL);
694 switch (codec->codec_type) {
695 case AVMEDIA_TYPE_VIDEO:
696 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
697 if(st->avg_frame_rate.num && st->avg_frame_rate.den && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
698 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9/av_q2d(st->avg_frame_rate));
700 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
703 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
704 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
705 || codec->codec_id == AV_CODEC_ID_SVQ1
706 || codec->codec_id == AV_CODEC_ID_SVQ3
707 || codec->codec_id == AV_CODEC_ID_CINEPAK))
711 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
712 else if (!native_id) {
713 // if there is no mkv-specific codec ID, use VFW mode
714 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
715 mkv->tracks[i].write_dts = 1;
718 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
719 // XXX: interlace flag?
720 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
721 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
723 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
724 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
725 // save stereo mode flag
726 uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
728 for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
729 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
734 if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
735 || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
736 av_log(s, AV_LOG_ERROR,
737 "The specified stereo mode is not valid.\n");
738 return AVERROR(EINVAL);
740 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
747 display_width_div = 2;
753 display_height_div = 2;
758 if ((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) ||
759 (tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) ||
760 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
761 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
764 if (st->sample_aspect_ratio.num) {
765 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
766 if (d_width > INT_MAX) {
767 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
768 return AVERROR(EINVAL);
770 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
771 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
772 } else if (display_width_div != 1 || display_height_div != 1) {
773 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
774 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
777 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
778 uint32_t color_space = av_le2ne32(codec->codec_tag);
779 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
781 end_ebml_master(pb, subinfo);
784 case AVMEDIA_TYPE_AUDIO:
785 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
788 // no mkv-specific ID, use ACM mode
789 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
791 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
792 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
793 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
794 if (output_sample_rate)
795 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
797 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
798 end_ebml_master(pb, subinfo);
801 case AVMEDIA_TYPE_SUBTITLE:
803 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
804 return AVERROR(ENOSYS);
807 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
808 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
810 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
813 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
814 return AVERROR(EINVAL);
817 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
818 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
819 if (ret < 0) return ret;
822 end_ebml_master(pb, track);
824 // ms precision is the de-facto standard timescale for mkv files
825 avpriv_set_pts_info(st, 64, 1, 1000);
827 end_ebml_master(pb, tracks);
831 static int mkv_write_chapters(AVFormatContext *s)
833 MatroskaMuxContext *mkv = s->priv_data;
834 AVIOContext *pb = s->pb;
835 ebml_master chapters, editionentry;
836 AVRational scale = {1, 1E9};
839 if (!s->nb_chapters || mkv->wrote_chapters)
842 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
843 if (ret < 0) return ret;
845 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
846 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
847 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
848 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
849 for (i = 0; i < s->nb_chapters; i++) {
850 ebml_master chapteratom, chapterdisplay;
851 AVChapter *c = s->chapters[i];
852 AVDictionaryEntry *t = NULL;
854 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
855 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
856 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
857 av_rescale_q(c->start, c->time_base, scale));
858 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
859 av_rescale_q(c->end, c->time_base, scale));
860 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
861 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
862 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
863 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
864 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
865 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
866 end_ebml_master(pb, chapterdisplay);
868 end_ebml_master(pb, chapteratom);
870 end_ebml_master(pb, editionentry);
871 end_ebml_master(pb, chapters);
873 mkv->wrote_chapters = 1;
877 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
879 uint8_t *key = av_strdup(t->key);
881 const uint8_t *lang = NULL;
884 if ((p = strrchr(p, '-')) &&
885 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
892 else if (*p >= 'a' && *p <= 'z')
897 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
898 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
900 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
901 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
902 end_ebml_master(pb, tag);
907 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
908 unsigned int uid, ebml_master *tags)
910 MatroskaMuxContext *mkv = s->priv_data;
911 ebml_master tag, targets;
912 AVDictionaryEntry *t = NULL;
916 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
917 if (ret < 0) return ret;
919 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
922 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
923 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
925 put_ebml_uint(s->pb, elementid, uid);
926 end_ebml_master(s->pb, targets);
928 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
929 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
930 mkv_write_simpletag(s->pb, t);
932 end_ebml_master(s->pb, tag);
936 static int mkv_check_tag(AVDictionary *m)
938 AVDictionaryEntry *t = NULL;
940 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
941 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
947 static int mkv_write_tags(AVFormatContext *s)
949 MatroskaMuxContext *mkv = s->priv_data;
950 ebml_master tags = {0};
953 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
955 if (mkv_check_tag(s->metadata)) {
956 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
957 if (ret < 0) return ret;
960 for (i = 0; i < s->nb_streams; i++) {
961 AVStream *st = s->streams[i];
963 if (!mkv_check_tag(st->metadata))
966 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
967 if (ret < 0) return ret;
970 for (i = 0; i < s->nb_chapters; i++) {
971 AVChapter *ch = s->chapters[i];
973 if (!mkv_check_tag(ch->metadata))
976 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
977 if (ret < 0) return ret;
981 end_ebml_master(s->pb, tags);
985 static int mkv_write_attachments(AVFormatContext *s)
987 MatroskaMuxContext *mkv = s->priv_data;
988 AVIOContext *pb = s->pb;
989 ebml_master attachments;
993 if (!mkv->have_attachments)
996 av_lfg_init(&c, av_get_random_seed());
998 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
999 if (ret < 0) return ret;
1001 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1003 for (i = 0; i < s->nb_streams; i++) {
1004 AVStream *st = s->streams[i];
1005 ebml_master attached_file;
1006 AVDictionaryEntry *t;
1007 const char *mimetype = NULL;
1010 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1013 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1015 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1016 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1017 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1018 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1019 return AVERROR(EINVAL);
1021 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1022 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1023 mimetype = t->value;
1024 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1026 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1027 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1028 mimetype = ff_mkv_mime_tags[i].str;
1033 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1034 "it cannot be deduced from the codec id.\n", i);
1035 return AVERROR(EINVAL);
1038 if (st->codec->flags & CODEC_FLAG_BITEXACT) {
1039 struct AVSHA *sha = av_sha_alloc();
1042 return AVERROR(ENOMEM);
1043 av_sha_init(sha, 160);
1044 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1045 av_sha_final(sha, digest);
1047 fileuid = AV_RL64(digest);
1049 fileuid = av_lfg_get(&c);
1051 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1054 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1055 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1056 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1057 end_ebml_master(pb, attached_file);
1059 end_ebml_master(pb, attachments);
1064 static int mkv_write_header(AVFormatContext *s)
1066 MatroskaMuxContext *mkv = s->priv_data;
1067 AVIOContext *pb = s->pb;
1068 ebml_master ebml_header, segment_info;
1069 AVDictionaryEntry *tag;
1072 if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
1073 else mkv->mode = MODE_MATROSKAv2;
1075 if (s->avoid_negative_ts < 0)
1076 s->avoid_negative_ts = 1;
1078 for (i = 0; i < s->nb_streams; i++)
1079 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1080 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1081 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1082 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1083 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1084 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1085 av_log(s, AV_LOG_ERROR,
1086 "The Matroska muxer does not yet support muxing %s\n",
1087 avcodec_get_name(s->streams[i]->codec->codec_id));
1088 return AVERROR_PATCHWELCOME;
1091 mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
1093 return AVERROR(ENOMEM);
1095 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1096 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1097 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1098 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1099 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1100 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1101 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , 4);
1102 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1103 end_ebml_master(pb, ebml_header);
1105 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1106 mkv->segment_offset = avio_tell(pb);
1108 // we write 2 seek heads - one at the end of the file to point to each
1109 // cluster, and one at the beginning to point to all other level one
1110 // elements (including the seek head at the end of the file), which
1111 // isn't more than 10 elements if we only write one of each other
1112 // currently defined level 1 element
1113 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1114 if (!mkv->main_seekhead)
1115 return AVERROR(ENOMEM);
1117 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1118 if (ret < 0) return ret;
1120 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1121 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1122 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1123 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1124 if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
1125 uint32_t segment_uid[4];
1128 av_lfg_init(&lfg, av_get_random_seed());
1130 for (i = 0; i < 4; i++)
1131 segment_uid[i] = av_lfg_get(&lfg);
1133 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
1134 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1135 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1137 const char *ident = "Lavf";
1138 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1139 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1142 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1143 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1144 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1145 uint8_t date_utc_buf[8];
1146 AV_WB64(date_utc_buf, date_utc);
1147 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1150 // reserve space for the duration
1152 mkv->duration_offset = avio_tell(pb);
1153 put_ebml_void(pb, 11); // assumes double-precision float to be written
1154 end_ebml_master(pb, segment_info);
1156 ret = mkv_write_tracks(s);
1157 if (ret < 0) return ret;
1159 for (i = 0; i < s->nb_chapters; i++)
1160 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1162 if (mkv->mode != MODE_WEBM) {
1163 ret = mkv_write_chapters(s);
1164 if (ret < 0) return ret;
1166 ret = mkv_write_tags(s);
1167 if (ret < 0) return ret;
1169 ret = mkv_write_attachments(s);
1170 if (ret < 0) return ret;
1173 if (!s->pb->seekable)
1174 mkv_write_seekhead(pb, mkv->main_seekhead);
1176 mkv->cues = mkv_start_cues(mkv->segment_offset);
1177 if (mkv->cues == NULL)
1178 return AVERROR(ENOMEM);
1180 if (pb->seekable && mkv->reserve_cues_space) {
1181 mkv->cues_pos = avio_tell(pb);
1182 put_ebml_void(pb, mkv->reserve_cues_space);
1185 av_init_packet(&mkv->cur_audio_pkt);
1186 mkv->cur_audio_pkt.size = 0;
1187 mkv->cluster_pos = -1;
1191 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1192 // after 4k and on a keyframe
1194 if (mkv->cluster_time_limit < 0)
1195 mkv->cluster_time_limit = 5000;
1196 if (mkv->cluster_size_limit < 0)
1197 mkv->cluster_size_limit = 5 * 1024 * 1024;
1199 if (mkv->cluster_time_limit < 0)
1200 mkv->cluster_time_limit = 1000;
1201 if (mkv->cluster_size_limit < 0)
1202 mkv->cluster_size_limit = 32 * 1024;
1208 static int mkv_blockgroup_size(int pkt_size)
1210 int size = pkt_size + 4;
1211 size += ebml_num_size(size);
1212 size += 2; // EBML ID for block and block duration
1213 size += 8; // max size of block duration
1214 size += ebml_num_size(size);
1215 size += 1; // blockgroup EBML ID
1219 static int ass_get_duration(const uint8_t *p)
1221 int sh, sm, ss, sc, eh, em, es, ec;
1222 uint64_t start, end;
1224 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1225 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1227 start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc;
1228 end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec;
1233 static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1235 MatroskaMuxContext *mkv = s->priv_data;
1236 int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
1237 uint8_t *start, *end, *data = pkt->data;
1238 ebml_master blockgroup;
1242 int duration = ass_get_duration(data);
1243 max_duration = FFMAX(duration, max_duration);
1244 end = memchr(data, '\n', data_size);
1245 size = line_size = end ? end-data+1 : data_size;
1246 size -= end ? (end[-1]=='\r')+1 : 0;
1248 for (i=0; i<3; i++, start++)
1249 if (!(start = memchr(start, ',', size-(start-data))))
1250 return max_duration;
1251 size -= start - data;
1252 sscanf(data, "Dialogue: %d,", &layer);
1253 i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
1254 s->streams[pkt->stream_index]->nb_frames, layer);
1255 size = FFMIN(i+size, sizeof(buffer));
1256 memcpy(buffer+i, start, size-i);
1258 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1259 "pts %" PRId64 ", duration %d\n",
1260 avio_tell(pb), size, pkt->pts, duration);
1261 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1262 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1263 put_ebml_num(pb, size+4, 0);
1264 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1265 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1267 avio_write(pb, buffer, size);
1268 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1269 end_ebml_master(pb, blockgroup);
1272 data_size -= line_size;
1275 return max_duration;
1279 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1286 dst = av_malloc(srclen);
1288 return AVERROR(ENOMEM);
1290 while (srclen >= WV_HEADER_SIZE) {
1293 ret = ff_wv_parse_header(&header, src);
1296 src += WV_HEADER_SIZE;
1297 srclen -= WV_HEADER_SIZE;
1299 if (srclen < header.blocksize) {
1300 ret = AVERROR_INVALIDDATA;
1304 if (header.initial) {
1305 AV_WL32(dst + offset, header.samples);
1308 AV_WL32(dst + offset, header.flags);
1309 AV_WL32(dst + offset + 4, header.crc);
1312 if (!(header.initial && header.final)) {
1313 AV_WL32(dst + offset, header.blocksize);
1317 memcpy(dst + offset, src, header.blocksize);
1318 src += header.blocksize;
1319 srclen -= header.blocksize;
1320 offset += header.blocksize;
1332 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1333 unsigned int blockid, AVPacket *pkt, int flags)
1335 MatroskaMuxContext *mkv = s->priv_data;
1336 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1337 uint8_t *data = NULL, *side_data = NULL;
1338 int offset = 0, size = pkt->size, side_data_size = 0;
1339 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1340 uint64_t additional_id = 0;
1341 int64_t discard_padding = 0;
1342 ebml_master block_group, block_additions, block_more;
1344 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1345 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1346 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1347 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1348 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1349 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1350 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1351 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1353 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1359 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1360 /* Matroska specification requires to remove the first QuickTime atom
1366 side_data = av_packet_get_side_data(pkt,
1367 AV_PKT_DATA_SKIP_SAMPLES,
1370 if (side_data && side_data_size >= 10) {
1371 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1372 (AVRational){1, codec->sample_rate},
1373 (AVRational){1, 1000000000});
1376 side_data = av_packet_get_side_data(pkt,
1377 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1380 additional_id = AV_RB64(side_data);
1382 side_data_size -= 8;
1385 if ((side_data_size && additional_id == 1) || discard_padding) {
1386 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1387 blockid = MATROSKA_ID_BLOCK;
1390 put_ebml_id(pb, blockid);
1391 put_ebml_num(pb, size+4, 0);
1392 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1393 avio_wb16(pb, ts - mkv->cluster_pts);
1395 avio_write(pb, data + offset, size);
1396 if (data != pkt->data)
1399 if (discard_padding) {
1400 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1403 if (side_data_size && additional_id == 1) {
1404 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1405 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1406 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1407 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1408 put_ebml_num(pb, side_data_size, 0);
1409 avio_write(pb, side_data, side_data_size);
1410 end_ebml_master(pb, block_more);
1411 end_ebml_master(pb, block_additions);
1413 if ((side_data_size && additional_id == 1) || discard_padding) {
1414 end_ebml_master(pb, block_group);
1418 static int srt_get_duration(uint8_t **buf)
1420 int i, duration = 0;
1422 for (i=0; i<2 && !duration; i++) {
1423 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1424 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1425 &s_hour, &s_min, &s_sec, &s_hsec,
1426 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1427 s_min += 60*s_hour; e_min += 60*e_hour;
1428 s_sec += 60*s_min; e_sec += 60*e_min;
1429 s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
1430 duration = e_hsec - s_hsec;
1432 *buf += ff_subtitles_next_line(*buf);
1437 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1439 ebml_master blockgroup;
1440 AVPacket pkt2 = *pkt;
1441 int64_t duration = srt_get_duration(&pkt2.data);
1442 pkt2.size -= pkt2.data - pkt->data;
1444 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1445 mkv_blockgroup_size(pkt2.size));
1446 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1447 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1448 end_ebml_master(pb, blockgroup);
1453 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1455 MatroskaMuxContext *mkv = s->priv_data;
1456 ebml_master blockgroup;
1457 int id_size, settings_size, size;
1458 uint8_t *id, *settings;
1459 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1460 const int flags = 0;
1463 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1467 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1470 size = id_size + 1 + settings_size + 1 + pkt->size;
1472 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1473 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1474 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1476 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1478 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1479 put_ebml_num(pb, size+4, 0);
1480 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1481 avio_wb16(pb, ts - mkv->cluster_pts);
1483 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1485 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1486 end_ebml_master(pb, blockgroup);
1488 return pkt->duration;
1491 static void mkv_flush_dynbuf(AVFormatContext *s)
1493 MatroskaMuxContext *mkv = s->priv_data;
1500 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1501 avio_write(s->pb, dyn_buf, bufsize);
1506 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1508 MatroskaMuxContext *mkv = s->priv_data;
1509 AVIOContext *pb = s->pb;
1510 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1511 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1512 int duration = pkt->duration;
1514 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1515 int64_t relative_packet_pos;
1517 if (ts == AV_NOPTS_VALUE) {
1518 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1519 return AVERROR(EINVAL);
1522 if (!s->pb->seekable) {
1524 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1525 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1532 if (mkv->cluster_pos == -1) {
1533 mkv->cluster_pos = avio_tell(s->pb);
1534 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1535 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1536 mkv->cluster_pts = FFMAX(0, ts);
1539 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1541 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1542 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1544 } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1545 duration = mkv_write_ass_blocks(s, pb, pkt);
1547 } else if (codec->codec_id == AV_CODEC_ID_SRT) {
1548 duration = mkv_write_srt_blocks(s, pb, pkt);
1549 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1550 duration = mkv_write_vtt_blocks(s, pb, pkt);
1552 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
1553 /* For backward compatibility, prefer convergence_duration. */
1554 if (pkt->convergence_duration > 0) {
1555 duration = pkt->convergence_duration;
1557 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1558 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1559 end_ebml_master(pb, blockgroup);
1562 if ((codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) || codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1563 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos, relative_packet_pos,
1564 codec->codec_type == AVMEDIA_TYPE_SUBTITLE ? duration : -1);
1565 if (ret < 0) return ret;
1568 mkv->duration = FFMAX(mkv->duration, ts + duration);
1572 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1574 MatroskaMuxContext *mkv = s->priv_data;
1575 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1576 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1578 int64_t cluster_time;
1582 if (mkv->tracks[pkt->stream_index].write_dts)
1583 cluster_time = pkt->dts - mkv->cluster_pts;
1585 cluster_time = pkt->pts - mkv->cluster_pts;
1587 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1588 // after 4k and on a keyframe
1589 if (s->pb->seekable) {
1591 cluster_size = avio_tell(pb) - mkv->cluster_pos;
1594 cluster_size = avio_tell(pb);
1597 if (mkv->cluster_pos != -1 &&
1598 (cluster_size > mkv->cluster_size_limit ||
1599 cluster_time > mkv->cluster_time_limit ||
1600 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1601 cluster_size > 4 * 1024))) {
1602 av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
1603 " bytes, pts %" PRIu64 "dts %" PRIu64 "\n",
1604 avio_tell(pb), pkt->pts, pkt->dts);
1605 end_ebml_master(pb, mkv->cluster);
1606 mkv->cluster_pos = -1;
1608 mkv_flush_dynbuf(s);
1612 // check if we have an audio packet cached
1613 if (mkv->cur_audio_pkt.size > 0) {
1614 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1615 av_free_packet(&mkv->cur_audio_pkt);
1617 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1622 // buffer an audio packet to ensure the packet containing the video
1623 // keyframe's timecode is contained in the same cluster for WebM
1624 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1625 mkv->cur_audio_pkt = *pkt;
1627 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1628 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1630 ret = av_dup_packet(&mkv->cur_audio_pkt);
1631 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1632 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1635 ret = mkv_write_packet_internal(s, pkt);
1639 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1641 MatroskaMuxContext *mkv = s->priv_data;
1643 if (s->pb->seekable)
1648 if (mkv->cluster_pos != -1) {
1649 av_log(s, AV_LOG_DEBUG, "Flushing cluster at offset %" PRIu64
1650 " bytes\n", avio_tell(pb));
1651 end_ebml_master(pb, mkv->cluster);
1652 mkv->cluster_pos = -1;
1654 mkv_flush_dynbuf(s);
1659 return mkv_write_packet(s, pkt);
1662 static int mkv_write_trailer(AVFormatContext *s)
1664 MatroskaMuxContext *mkv = s->priv_data;
1665 AVIOContext *pb = s->pb;
1666 int64_t currentpos, cuespos;
1669 // check if we have an audio packet cached
1670 if (mkv->cur_audio_pkt.size > 0) {
1671 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
1672 av_free_packet(&mkv->cur_audio_pkt);
1674 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
1680 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1681 mkv_flush_dynbuf(s);
1682 } else if (mkv->cluster_pos != -1) {
1683 end_ebml_master(pb, mkv->cluster);
1686 if (mkv->mode != MODE_WEBM) {
1687 ret = mkv_write_chapters(s);
1688 if (ret < 0) return ret;
1692 if (mkv->cues->num_entries) {
1693 if (mkv->reserve_cues_space) {
1696 currentpos = avio_tell(pb);
1697 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1699 cuespos = mkv_write_cues(pb, mkv->cues, mkv->tracks, s->nb_streams);
1700 cues_end = avio_tell(pb);
1701 if (cues_end > cuespos + mkv->reserve_cues_space) {
1702 av_log(s, AV_LOG_ERROR, "Insufficient space reserved for cues: %d "
1703 "(needed: %"PRId64").\n", mkv->reserve_cues_space,
1704 cues_end - cuespos);
1705 return AVERROR(EINVAL);
1708 if (cues_end < cuespos + mkv->reserve_cues_space)
1709 put_ebml_void(pb, mkv->reserve_cues_space - (cues_end - cuespos));
1711 avio_seek(pb, currentpos, SEEK_SET);
1713 cuespos = mkv_write_cues(pb, mkv->cues, mkv->tracks, s->nb_streams);
1716 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
1717 if (ret < 0) return ret;
1720 mkv_write_seekhead(pb, mkv->main_seekhead);
1722 // update the duration
1723 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1724 currentpos = avio_tell(pb);
1725 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1726 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1728 avio_seek(pb, currentpos, SEEK_SET);
1731 end_ebml_master(pb, mkv->segment);
1732 av_freep(&mkv->tracks);
1733 av_freep(&mkv->cues->entries);
1734 av_freep(&mkv->cues);
1739 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1742 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1743 if (ff_mkv_codec_tags[i].id == codec_id)
1746 if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any
1747 enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM
1748 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1755 static const AVCodecTag additional_audio_tags[] = {
1756 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1757 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1758 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1759 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1760 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1761 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1762 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1763 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1764 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1765 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1766 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1767 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1768 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1771 static const AVCodecTag additional_video_tags[] = {
1772 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1773 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1774 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1775 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1776 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1777 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1780 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
1781 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
1782 static const AVOption options[] = {
1783 { "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 },
1784 { "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 },
1785 { "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 },
1789 #if CONFIG_MATROSKA_MUXER
1790 static const AVClass matroska_class = {
1791 .class_name = "matroska muxer",
1792 .item_name = av_default_item_name,
1794 .version = LIBAVUTIL_VERSION_INT,
1797 AVOutputFormat ff_matroska_muxer = {
1799 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1800 .mime_type = "video/x-matroska",
1801 .extensions = "mkv",
1802 .priv_data_size = sizeof(MatroskaMuxContext),
1803 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1804 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1805 .video_codec = CONFIG_LIBX264_ENCODER ?
1806 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
1807 .write_header = mkv_write_header,
1808 .write_packet = mkv_write_flush_packet,
1809 .write_trailer = mkv_write_trailer,
1810 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1811 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1812 .codec_tag = (const AVCodecTag* const []){
1813 ff_codec_bmp_tags, ff_codec_wav_tags,
1814 additional_audio_tags, additional_video_tags, 0
1817 .subtitle_codec = AV_CODEC_ID_SSA,
1819 .subtitle_codec = AV_CODEC_ID_ASS,
1821 .query_codec = mkv_query_codec,
1822 .priv_class = &matroska_class,
1826 #if CONFIG_WEBM_MUXER
1827 static const AVClass webm_class = {
1828 .class_name = "webm muxer",
1829 .item_name = av_default_item_name,
1831 .version = LIBAVUTIL_VERSION_INT,
1834 AVOutputFormat ff_webm_muxer = {
1836 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
1837 .mime_type = "video/webm",
1838 .extensions = "webm",
1839 .priv_data_size = sizeof(MatroskaMuxContext),
1840 .audio_codec = AV_CODEC_ID_VORBIS,
1841 .video_codec = AV_CODEC_ID_VP8,
1842 .subtitle_codec = AV_CODEC_ID_WEBVTT,
1843 .write_header = mkv_write_header,
1844 .write_packet = mkv_write_flush_packet,
1845 .write_trailer = mkv_write_trailer,
1846 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
1847 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
1848 .priv_class = &webm_class,
1852 #if CONFIG_MATROSKA_AUDIO_MUXER
1853 static const AVClass mka_class = {
1854 .class_name = "matroska audio muxer",
1855 .item_name = av_default_item_name,
1857 .version = LIBAVUTIL_VERSION_INT,
1859 AVOutputFormat ff_matroska_audio_muxer = {
1861 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
1862 .mime_type = "audio/x-matroska",
1863 .extensions = "mka",
1864 .priv_data_size = sizeof(MatroskaMuxContext),
1865 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1866 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
1867 .video_codec = AV_CODEC_ID_NONE,
1868 .write_header = mkv_write_header,
1869 .write_packet = mkv_write_flush_packet,
1870 .write_trailer = mkv_write_trailer,
1871 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
1873 .codec_tag = (const AVCodecTag* const []){
1874 ff_codec_wav_tags, additional_audio_tags, 0
1876 .priv_class = &mka_class,