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
27 #include "avio_internal.h"
28 #include "avlanguage.h"
34 #include "subtitles.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/dict.h"
41 #include "libavutil/intfloat.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/lfg.h"
44 #include "libavutil/mathematics.h"
45 #include "libavutil/opt.h"
46 #include "libavutil/random_seed.h"
47 #include "libavutil/samplefmt.h"
48 #include "libavutil/sha.h"
50 #include "libavcodec/xiph.h"
51 #include "libavcodec/mpeg4audio.h"
52 #include "libavcodec/internal.h"
54 typedef struct ebml_master {
55 int64_t pos; ///< absolute offset in the file where the master's elements start
56 int sizebytes; ///< how many bytes were reserved for the size
59 typedef struct mkv_seekhead_entry {
60 unsigned int elementid;
64 typedef struct mkv_seekhead {
66 int64_t segment_offset; ///< the file offset to the beginning of the segment
67 int reserved_size; ///< -1 if appending to file
69 mkv_seekhead_entry *entries;
77 int64_t cluster_pos; ///< file offset of the cluster containing the block
78 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
79 int64_t duration; ///< duration of the block according to time base
83 int64_t segment_offset;
84 mkv_cuepoint *entries;
94 #define MODE_MATROSKAv2 0x01
95 #define MODE_WEBM 0x02
97 typedef struct MatroskaMuxContext {
102 int64_t segment_offset;
104 int64_t cluster_pos; ///< file offset of the current cluster
106 int64_t duration_offset;
108 mkv_seekhead *main_seekhead;
112 AVPacket cur_audio_pkt;
114 int have_attachments;
116 int reserve_cues_space;
117 int cluster_size_limit;
119 int64_t cluster_time_limit;
121 int dash_track_number;
123 uint32_t chapter_id_offset;
125 } MatroskaMuxContext;
128 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
129 * offset, 4 bytes for target EBML ID */
130 #define MAX_SEEKENTRY_SIZE 21
132 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
134 #define MAX_CUETRACKPOS_SIZE 42
136 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
137 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
139 /** Seek preroll value for opus */
140 #define OPUS_SEEK_PREROLL 80000000
142 static int ebml_id_size(unsigned int id)
144 return (av_log2(id + 1) - 1) / 7 + 1;
147 static void put_ebml_id(AVIOContext *pb, unsigned int id)
149 int i = ebml_id_size(id);
151 avio_w8(pb, (uint8_t)(id >> (i * 8)));
155 * Write an EBML size meaning "unknown size".
157 * @param bytes The number of bytes the size should occupy (maximum: 8).
159 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
161 av_assert0(bytes <= 8);
162 avio_w8(pb, 0x1ff >> bytes);
163 ffio_fill(pb, 0xff, bytes - 1);
167 * Calculate how many bytes are needed to represent a given number in EBML.
169 static int ebml_num_size(uint64_t num)
172 while ((num + 1) >> bytes * 7)
178 * Write a number in EBML variable length format.
180 * @param bytes The number of bytes that need to be used to write the number.
181 * If zero, any number of bytes can be used.
183 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
185 int i, needed_bytes = ebml_num_size(num);
187 // sizes larger than this are currently undefined in EBML
188 av_assert0(num < (1ULL << 56) - 1);
191 // don't care how many bytes are used, so use the min
192 bytes = needed_bytes;
193 // the bytes needed to write the given size would exceed the bytes
194 // that we need to use, so write unknown size. This shouldn't happen.
195 av_assert0(bytes >= needed_bytes);
197 num |= 1ULL << bytes * 7;
198 for (i = bytes - 1; i >= 0; i--)
199 avio_w8(pb, (uint8_t)(num >> i * 8));
202 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
209 put_ebml_id(pb, elementid);
210 put_ebml_num(pb, bytes, 0);
211 for (i = bytes - 1; i >= 0; i--)
212 avio_w8(pb, (uint8_t)(val >> i * 8));
215 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
218 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
220 while (tmp>>=8) bytes++;
222 put_ebml_id(pb, elementid);
223 put_ebml_num(pb, bytes, 0);
224 for (i = bytes - 1; i >= 0; i--)
225 avio_w8(pb, (uint8_t)(val >> i * 8));
228 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
230 put_ebml_id(pb, elementid);
231 put_ebml_num(pb, 8, 0);
232 avio_wb64(pb, av_double2int(val));
235 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
236 const void *buf, int size)
238 put_ebml_id(pb, elementid);
239 put_ebml_num(pb, size, 0);
240 avio_write(pb, buf, size);
243 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
246 put_ebml_binary(pb, elementid, str, strlen(str));
250 * Write a void element of a given size. Useful for reserving space in
251 * the file to be written to later.
253 * @param size The number of bytes to reserve, which must be at least 2.
255 static void put_ebml_void(AVIOContext *pb, uint64_t size)
257 int64_t currentpos = avio_tell(pb);
259 av_assert0(size >= 2);
261 put_ebml_id(pb, EBML_ID_VOID);
262 // we need to subtract the length needed to store the size from the
263 // size we need to reserve so 2 cases, we use 8 bytes to store the
264 // size if possible, 1 byte otherwise
266 put_ebml_num(pb, size - 1, 0);
268 put_ebml_num(pb, size - 9, 8);
269 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
272 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
273 uint64_t expectedsize)
275 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
276 put_ebml_id(pb, elementid);
277 put_ebml_size_unknown(pb, bytes);
278 return (ebml_master) {avio_tell(pb), bytes };
281 static void end_ebml_master(AVIOContext *pb, ebml_master master)
283 int64_t pos = avio_tell(pb);
285 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
287 put_ebml_num(pb, pos - master.pos, master.sizebytes);
288 avio_seek(pb, pos, SEEK_SET);
291 static void put_xiph_size(AVIOContext *pb, int size)
293 ffio_fill(pb, 255, size / 255);
294 avio_w8(pb, size % 255);
298 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
299 * elements. If a maximum number of elements is specified, enough space
300 * will be reserved at the current file location to write a seek head of
303 * @param segment_offset The absolute offset to the position in the file
304 * where the segment begins.
305 * @param numelements The maximum number of elements that will be indexed
306 * by this seek head, 0 if unlimited.
308 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
311 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
312 if (new_seekhead == NULL)
315 new_seekhead->segment_offset = segment_offset;
317 if (numelements > 0) {
318 new_seekhead->filepos = avio_tell(pb);
319 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
320 // and size, and 3 bytes to guarantee that an EBML void element
321 // will fit afterwards
322 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
323 new_seekhead->max_entries = numelements;
324 put_ebml_void(pb, new_seekhead->reserved_size);
329 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
331 mkv_seekhead_entry *entries = seekhead->entries;
333 // don't store more elements than we reserved space for
334 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
337 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
339 return AVERROR(ENOMEM);
340 seekhead->entries = entries;
342 seekhead->entries[seekhead->num_entries].elementid = elementid;
343 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
349 * Write the seek head to the file and free it. If a maximum number of
350 * elements was specified to mkv_start_seekhead(), the seek head will
351 * be written at the location reserved for it. Otherwise, it is written
352 * at the current location in the file.
354 * @return The file offset where the seekhead was written,
355 * -1 if an error occurred.
357 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
359 ebml_master metaseek, seekentry;
363 currentpos = avio_tell(pb);
365 if (seekhead->reserved_size > 0) {
366 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
372 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
373 for (i = 0; i < seekhead->num_entries; i++) {
374 mkv_seekhead_entry *entry = &seekhead->entries[i];
376 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
378 put_ebml_id(pb, MATROSKA_ID_SEEKID);
379 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
380 put_ebml_id(pb, entry->elementid);
382 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
383 end_ebml_master(pb, seekentry);
385 end_ebml_master(pb, metaseek);
387 if (seekhead->reserved_size > 0) {
388 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
389 put_ebml_void(pb, remaining);
390 avio_seek(pb, currentpos, SEEK_SET);
392 currentpos = seekhead->filepos;
395 av_freep(&seekhead->entries);
401 static mkv_cues *mkv_start_cues(int64_t segment_offset)
403 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
407 cues->segment_offset = segment_offset;
411 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
412 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
414 mkv_cuepoint *entries = cues->entries;
419 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
421 return AVERROR(ENOMEM);
422 cues->entries = entries;
424 cues->entries[cues->num_entries].pts = ts;
425 cues->entries[cues->num_entries].stream_idx = stream;
426 cues->entries[cues->num_entries].tracknum = tracknum;
427 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
428 cues->entries[cues->num_entries].relative_pos = relative_pos;
429 cues->entries[cues->num_entries++].duration = duration;
434 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
436 AVIOContext *pb = s->pb;
437 ebml_master cues_element;
441 currentpos = avio_tell(pb);
442 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
444 for (i = 0; i < cues->num_entries; i++) {
445 ebml_master cuepoint, track_positions;
446 mkv_cuepoint *entry = &cues->entries[i];
447 uint64_t pts = entry->pts;
449 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
450 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
452 // put all the entries from different tracks that have the exact same
453 // timestamp into the same CuePoint
454 for (j = 0; j < num_tracks; j++)
455 tracks[j].has_cue = 0;
456 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
457 int tracknum = entry[j].stream_idx;
458 av_assert0(tracknum>=0 && tracknum<num_tracks);
459 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
461 tracks[tracknum].has_cue = 1;
462 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
463 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
464 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
465 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
466 if (entry[j].duration != -1)
467 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
468 end_ebml_master(pb, track_positions);
471 end_ebml_master(pb, cuepoint);
473 end_ebml_master(pb, cues_element);
478 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
480 uint8_t *header_start[3];
482 int first_header_size;
485 if (codec->codec_id == AV_CODEC_ID_VORBIS)
486 first_header_size = 30;
488 first_header_size = 42;
490 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
491 first_header_size, header_start, header_len) < 0) {
492 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
496 avio_w8(pb, 2); // number packets - 1
497 for (j = 0; j < 2; j++) {
498 put_xiph_size(pb, header_len[j]);
500 for (j = 0; j < 3; j++)
501 avio_write(pb, header_start[j], header_len[j]);
506 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
508 if (codec->extradata && codec->extradata_size == 2)
509 avio_write(pb, codec->extradata, 2);
511 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
515 static int put_flac_codecpriv(AVFormatContext *s,
516 AVIOContext *pb, AVCodecContext *codec)
518 int write_comment = (codec->channel_layout &&
519 !(codec->channel_layout & ~0x3ffffULL) &&
520 !ff_flac_is_native_layout(codec->channel_layout));
521 int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
528 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
529 "Lavf" : LIBAVFORMAT_IDENT;
530 AVDictionary *dict = NULL;
531 uint8_t buf[32], *data, *p;
534 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
535 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
537 len = ff_vorbiscomment_length(dict, vendor);
538 data = av_malloc(len + 4);
541 return AVERROR(ENOMEM);
545 AV_WB24(data + 1, len);
548 ff_vorbiscomment_write(&p, &dict, vendor);
550 avio_write(pb, data, len + 4);
559 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec,
560 int *sample_rate, int *output_sample_rate)
562 MPEG4AudioConfig mp4ac;
564 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
565 codec->extradata_size * 8, 1) < 0) {
566 av_log(s, AV_LOG_WARNING,
567 "Error parsing AAC extradata, unable to determine samplerate.\n");
571 *sample_rate = mp4ac.sample_rate;
572 *output_sample_rate = mp4ac.ext_sample_rate;
575 static int mkv_write_native_codecprivate(AVFormatContext *s,
576 AVCodecContext *codec,
579 switch (codec->codec_id) {
580 case AV_CODEC_ID_VORBIS:
581 case AV_CODEC_ID_THEORA:
582 return put_xiph_codecpriv(s, dyn_cp, codec);
583 case AV_CODEC_ID_FLAC:
584 return put_flac_codecpriv(s, dyn_cp, codec);
585 case AV_CODEC_ID_WAVPACK:
586 return put_wv_codecpriv(dyn_cp, codec);
587 case AV_CODEC_ID_H264:
588 return ff_isom_write_avcc(dyn_cp, codec->extradata,
589 codec->extradata_size);
590 case AV_CODEC_ID_HEVC:
591 return ff_isom_write_hvcc(dyn_cp, codec->extradata,
592 codec->extradata_size, 0);
593 case AV_CODEC_ID_ALAC:
594 if (codec->extradata_size < 36) {
595 av_log(s, AV_LOG_ERROR,
596 "Invalid extradata found, ALAC expects a 36-byte "
598 return AVERROR_INVALIDDATA;
600 avio_write(dyn_cp, codec->extradata + 12,
601 codec->extradata_size - 12);
604 if (codec->codec_id == AV_CODEC_ID_PRORES &&
605 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
606 avio_wl32(dyn_cp, codec->codec_tag);
607 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
608 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
614 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
615 AVCodecContext *codec, int native_id,
620 int ret, codecpriv_size;
622 ret = avio_open_dyn_buf(&dyn_cp);
627 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
628 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
630 if (!codec->codec_tag)
631 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
633 if (codec->extradata_size) {
634 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
635 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
638 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
639 avio_wl32(dyn_cp, codec->codec_tag);
640 for(i = 0; i < 0x5a - 8; i++)
643 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
646 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
647 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
648 avcodec_get_name(codec->codec_id));
650 if (!codec->codec_tag)
651 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
653 if (!codec->codec_tag) {
654 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
655 avcodec_get_name(codec->codec_id));
656 ret = AVERROR(EINVAL);
659 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
661 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
663 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
665 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
666 avcodec_get_name(codec->codec_id));
667 ret = AVERROR(EINVAL);
669 if (!codec->codec_tag)
670 codec->codec_tag = tag;
672 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
675 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
677 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
683 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb, int st_mode,
686 if ((mode == MODE_WEBM && st_mode > 3 && st_mode != 11)
687 || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) {
688 av_log(s, AV_LOG_ERROR,
689 "The specified stereo mode is not valid.\n");
690 return AVERROR(EINVAL);
692 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode);
697 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
698 int i, AVIOContext *pb, int default_stream_exists)
700 AVStream *st = s->streams[i];
701 AVCodecContext *codec = st->codec;
702 ebml_master subinfo, track;
705 int bit_depth = av_get_bits_per_sample(codec->codec_id);
706 int sample_rate = codec->sample_rate;
707 int output_sample_rate = 0;
708 int display_width_div = 1;
709 int display_height_div = 1;
711 AVDictionaryEntry *tag;
713 // ms precision is the de-facto standard timescale for mkv files
714 avpriv_set_pts_info(st, 64, 1, 1000);
716 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
717 mkv->have_attachments = 1;
721 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
722 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
724 bit_depth = codec->bits_per_coded_sample;
726 if (codec->codec_id == AV_CODEC_ID_AAC)
727 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
729 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
730 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
731 mkv->is_dash ? mkv->dash_track_number : i + 1);
732 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
733 mkv->is_dash ? mkv->dash_track_number : i + 1);
734 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
736 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
737 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
738 tag = av_dict_get(st->metadata, "language", NULL, 0);
739 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
740 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
741 } else if (tag && tag->value) {
742 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
745 // The default value for TRACKFLAGDEFAULT is 1, so add element
746 // if we need to clear it.
747 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
748 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
750 if (st->disposition & AV_DISPOSITION_FORCED)
751 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
753 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
754 const char *codec_id;
755 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
756 codec_id = "D_WEBVTT/CAPTIONS";
757 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
758 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
759 codec_id = "D_WEBVTT/DESCRIPTIONS";
760 native_id = MATROSKA_TRACK_TYPE_METADATA;
761 } else if (st->disposition & AV_DISPOSITION_METADATA) {
762 codec_id = "D_WEBVTT/METADATA";
763 native_id = MATROSKA_TRACK_TYPE_METADATA;
765 codec_id = "D_WEBVTT/SUBTITLES";
766 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
768 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
770 // look for a codec ID string specific to mkv to use,
771 // if none are found, use AVI codes
772 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
773 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
774 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
781 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->delay && codec->codec_id == AV_CODEC_ID_OPUS) {
782 // mkv->tracks[i].ts_offset = av_rescale_q(codec->delay,
783 // (AVRational){ 1, codec->sample_rate },
786 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
787 av_rescale_q(codec->delay, (AVRational){ 1, codec->sample_rate },
788 (AVRational){ 1, 1000000000 }));
790 if (codec->codec_id == AV_CODEC_ID_OPUS) {
791 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
794 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
795 codec->codec_id == AV_CODEC_ID_VP9 ||
796 codec->codec_id == AV_CODEC_ID_OPUS ||
797 codec->codec_id == AV_CODEC_ID_VORBIS ||
798 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
799 av_log(s, AV_LOG_ERROR,
800 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
801 return AVERROR(EINVAL);
804 switch (codec->codec_type) {
805 case AVMEDIA_TYPE_VIDEO:
806 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
808 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
809 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
810 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
812 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
815 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
816 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) ||
817 codec->codec_id == AV_CODEC_ID_SVQ1 ||
818 codec->codec_id == AV_CODEC_ID_SVQ3 ||
819 codec->codec_id == AV_CODEC_ID_CINEPAK))
823 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
824 else if (!native_id) {
825 // if there is no mkv-specific codec ID, use VFW mode
826 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
827 mkv->tracks[i].write_dts = 1;
830 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
831 // XXX: interlace flag?
832 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
833 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
835 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
836 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
837 int st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT;
839 for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++)
840 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[j])){
845 if (mkv_write_stereo_mode(s, pb, st_mode, mkv->mode) < 0)
846 return AVERROR(EINVAL);
853 display_width_div = 2;
859 display_height_div = 2;
864 if ((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) ||
865 (tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) ||
866 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
867 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
870 if (st->sample_aspect_ratio.num) {
871 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
872 if (d_width > INT_MAX) {
873 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
874 return AVERROR(EINVAL);
876 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
877 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
878 } else if (display_width_div != 1 || display_height_div != 1) {
879 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
880 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
883 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
884 uint32_t color_space = av_le2ne32(codec->codec_tag);
885 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
887 end_ebml_master(pb, subinfo);
890 case AVMEDIA_TYPE_AUDIO:
891 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
894 // no mkv-specific ID, use ACM mode
895 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
897 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
898 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
899 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
900 if (output_sample_rate)
901 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
903 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
904 end_ebml_master(pb, subinfo);
907 case AVMEDIA_TYPE_SUBTITLE:
909 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
910 return AVERROR(ENOSYS);
913 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
914 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
916 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
919 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
920 return AVERROR(EINVAL);
923 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
924 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
929 end_ebml_master(pb, track);
934 static int mkv_write_tracks(AVFormatContext *s)
936 MatroskaMuxContext *mkv = s->priv_data;
937 AVIOContext *pb = s->pb;
939 int i, ret, default_stream_exists = 0;
941 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
945 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
946 for (i = 0; i < s->nb_streams; i++) {
947 AVStream *st = s->streams[i];
948 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
950 for (i = 0; i < s->nb_streams; i++) {
951 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
955 end_ebml_master(pb, tracks);
959 static int mkv_write_chapters(AVFormatContext *s)
961 MatroskaMuxContext *mkv = s->priv_data;
962 AVIOContext *pb = s->pb;
963 ebml_master chapters, editionentry;
964 AVRational scale = {1, 1E9};
967 if (!s->nb_chapters || mkv->wrote_chapters)
970 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
971 if (ret < 0) return ret;
973 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
974 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
975 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
976 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
977 for (i = 0; i < s->nb_chapters; i++) {
978 ebml_master chapteratom, chapterdisplay;
979 AVChapter *c = s->chapters[i];
980 AVDictionaryEntry *t = NULL;
982 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
983 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
984 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
985 av_rescale_q(c->start, c->time_base, scale));
986 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
987 av_rescale_q(c->end, c->time_base, scale));
988 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
989 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
990 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
991 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
992 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
993 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
994 end_ebml_master(pb, chapterdisplay);
996 end_ebml_master(pb, chapteratom);
998 end_ebml_master(pb, editionentry);
999 end_ebml_master(pb, chapters);
1001 mkv->wrote_chapters = 1;
1005 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1007 uint8_t *key = av_strdup(t->key);
1009 const uint8_t *lang = NULL;
1012 if ((p = strrchr(p, '-')) &&
1013 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1020 else if (*p >= 'a' && *p <= 'z')
1025 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1026 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1028 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1029 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1030 end_ebml_master(pb, tag);
1035 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1036 unsigned int uid, ebml_master *tags)
1038 MatroskaMuxContext *mkv = s->priv_data;
1039 ebml_master tag, targets;
1040 AVDictionaryEntry *t = NULL;
1044 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1045 if (ret < 0) return ret;
1047 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1050 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1051 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1053 put_ebml_uint(s->pb, elementid, uid);
1054 end_ebml_master(s->pb, targets);
1056 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1057 if (av_strcasecmp(t->key, "title") &&
1058 av_strcasecmp(t->key, "stereo_mode") &&
1059 av_strcasecmp(t->key, "encoding_tool"))
1060 mkv_write_simpletag(s->pb, t);
1062 end_ebml_master(s->pb, tag);
1066 static int mkv_check_tag(AVDictionary *m)
1068 AVDictionaryEntry *t = NULL;
1070 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1071 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1077 static int mkv_write_tags(AVFormatContext *s)
1079 MatroskaMuxContext *mkv = s->priv_data;
1080 ebml_master tags = {0};
1083 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1085 if (mkv_check_tag(s->metadata)) {
1086 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1087 if (ret < 0) return ret;
1090 for (i = 0; i < s->nb_streams; i++) {
1091 AVStream *st = s->streams[i];
1093 if (!mkv_check_tag(st->metadata))
1096 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1097 if (ret < 0) return ret;
1100 for (i = 0; i < s->nb_chapters; i++) {
1101 AVChapter *ch = s->chapters[i];
1103 if (!mkv_check_tag(ch->metadata))
1106 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1107 if (ret < 0) return ret;
1111 end_ebml_master(s->pb, tags);
1115 static int mkv_write_attachments(AVFormatContext *s)
1117 MatroskaMuxContext *mkv = s->priv_data;
1118 AVIOContext *pb = s->pb;
1119 ebml_master attachments;
1123 if (!mkv->have_attachments)
1126 av_lfg_init(&c, av_get_random_seed());
1128 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1129 if (ret < 0) return ret;
1131 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1133 for (i = 0; i < s->nb_streams; i++) {
1134 AVStream *st = s->streams[i];
1135 ebml_master attached_file;
1136 AVDictionaryEntry *t;
1137 const char *mimetype = NULL;
1140 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1143 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1145 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1146 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1147 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1148 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1149 return AVERROR(EINVAL);
1151 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1152 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1153 mimetype = t->value;
1154 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1156 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1157 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1158 mimetype = ff_mkv_mime_tags[i].str;
1163 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1164 "it cannot be deduced from the codec id.\n", i);
1165 return AVERROR(EINVAL);
1168 if (s->flags & AVFMT_FLAG_BITEXACT) {
1169 struct AVSHA *sha = av_sha_alloc();
1172 return AVERROR(ENOMEM);
1173 av_sha_init(sha, 160);
1174 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1175 av_sha_final(sha, digest);
1177 fileuid = AV_RL64(digest);
1179 fileuid = av_lfg_get(&c);
1181 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1184 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1185 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1186 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1187 end_ebml_master(pb, attached_file);
1189 end_ebml_master(pb, attachments);
1194 static int mkv_write_header(AVFormatContext *s)
1196 MatroskaMuxContext *mkv = s->priv_data;
1197 AVIOContext *pb = s->pb;
1198 ebml_master ebml_header, segment_info;
1199 AVDictionaryEntry *tag;
1200 int ret, i, version = 2;
1202 if (!strcmp(s->oformat->name, "webm"))
1203 mkv->mode = MODE_WEBM;
1205 mkv->mode = MODE_MATROSKAv2;
1207 if (s->avoid_negative_ts < 0)
1208 s->avoid_negative_ts = 1;
1210 if (mkv->mode != MODE_WEBM ||
1211 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1212 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1215 for (i = 0; i < s->nb_streams; i++) {
1216 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1217 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1218 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1219 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1220 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1221 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1222 av_log(s, AV_LOG_ERROR,
1223 "The Matroska muxer does not yet support muxing %s\n",
1224 avcodec_get_name(s->streams[i]->codec->codec_id));
1225 return AVERROR_PATCHWELCOME;
1227 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1228 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1229 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1233 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1235 return AVERROR(ENOMEM);
1237 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1238 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1239 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1240 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1241 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1242 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1243 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1244 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1245 end_ebml_master(pb, ebml_header);
1247 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1248 mkv->segment_offset = avio_tell(pb);
1250 // we write 2 seek heads - one at the end of the file to point to each
1251 // cluster, and one at the beginning to point to all other level one
1252 // elements (including the seek head at the end of the file), which
1253 // isn't more than 10 elements if we only write one of each other
1254 // currently defined level 1 element
1255 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1256 if (!mkv->main_seekhead)
1257 return AVERROR(ENOMEM);
1259 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1260 if (ret < 0) return ret;
1262 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1263 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1264 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1265 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1266 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1267 uint32_t segment_uid[4];
1270 av_lfg_init(&lfg, av_get_random_seed());
1272 for (i = 0; i < 4; i++)
1273 segment_uid[i] = av_lfg_get(&lfg);
1275 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1276 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1277 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1279 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1280 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1282 const char *ident = "Lavf";
1283 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1284 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1287 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1288 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1289 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1290 uint8_t date_utc_buf[8];
1291 AV_WB64(date_utc_buf, date_utc);
1292 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1295 // reserve space for the duration
1297 mkv->duration_offset = avio_tell(pb);
1298 put_ebml_void(pb, 11); // assumes double-precision float to be written
1299 end_ebml_master(pb, segment_info);
1301 ret = mkv_write_tracks(s);
1305 for (i = 0; i < s->nb_chapters; i++)
1306 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1308 if (mkv->mode != MODE_WEBM) {
1309 ret = mkv_write_chapters(s);
1313 ret = mkv_write_tags(s);
1317 ret = mkv_write_attachments(s);
1322 if (!s->pb->seekable)
1323 mkv_write_seekhead(pb, mkv->main_seekhead);
1325 mkv->cues = mkv_start_cues(mkv->segment_offset);
1326 if (mkv->cues == NULL)
1327 return AVERROR(ENOMEM);
1329 if (pb->seekable && mkv->reserve_cues_space) {
1330 mkv->cues_pos = avio_tell(pb);
1331 put_ebml_void(pb, mkv->reserve_cues_space);
1334 av_init_packet(&mkv->cur_audio_pkt);
1335 mkv->cur_audio_pkt.size = 0;
1336 mkv->cluster_pos = -1;
1340 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1341 // after 4k and on a keyframe
1343 if (mkv->cluster_time_limit < 0)
1344 mkv->cluster_time_limit = 5000;
1345 if (mkv->cluster_size_limit < 0)
1346 mkv->cluster_size_limit = 5 * 1024 * 1024;
1348 if (mkv->cluster_time_limit < 0)
1349 mkv->cluster_time_limit = 1000;
1350 if (mkv->cluster_size_limit < 0)
1351 mkv->cluster_size_limit = 32 * 1024;
1357 static int mkv_blockgroup_size(int pkt_size)
1359 int size = pkt_size + 4;
1360 size += ebml_num_size(size);
1361 size += 2; // EBML ID for block and block duration
1362 size += 8; // max size of block duration
1363 size += ebml_num_size(size);
1364 size += 1; // blockgroup EBML ID
1368 static int ass_get_duration(const uint8_t *p)
1370 int sh, sm, ss, sc, eh, em, es, ec;
1371 uint64_t start, end;
1373 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
1374 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
1376 start = 3600000LL * sh + 60000LL * sm + 1000LL * ss + 10LL * sc;
1377 end = 3600000LL * eh + 60000LL * em + 1000LL * es + 10LL * ec;
1382 /* Writes the contents of pkt to a block, using the data starting at *datap.
1383 * If pkt corresponds to more than one block, this writes the contents of the first block
1384 * (starting from *datap) and updates *datap so it points to the beginning of the data
1385 * corresponding to the next block.
1387 static int mkv_write_ass_block(AVFormatContext *s, AVIOContext *pb,
1388 AVPacket *pkt, uint8_t **datap)
1390 MatroskaMuxContext *mkv = s->priv_data;
1391 int i, layer = 0, size, line_size, data_size = pkt->size - (*datap - pkt->data);
1392 uint8_t *start, *end, *data = *datap;
1393 ebml_master blockgroup;
1396 int duration = ass_get_duration(data);
1397 end = memchr(data, '\n', data_size);
1398 size = line_size = end ? end - data + 1 : data_size;
1399 size -= end ? (end[-1] == '\r') + 1 : 0;
1401 for (i = 0; i < 3; i++, start++)
1402 if (!(start = memchr(start, ',', size - (start - data))))
1404 size -= start - data;
1405 sscanf(data, "Dialogue: %d,", &layer);
1406 i = snprintf(buffer, sizeof(buffer), "%" PRId64 ",%d,",
1407 s->streams[pkt->stream_index]->nb_frames, layer);
1408 size = FFMIN(i + size, sizeof(buffer));
1409 memcpy(buffer + i, start, size - i);
1411 av_log(s, AV_LOG_DEBUG,
1412 "Writing block at offset %" PRIu64 ", size %d, "
1413 "pts %" PRId64 ", duration %d\n",
1414 avio_tell(pb), size, pkt->pts, duration);
1415 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1416 mkv_blockgroup_size(size));
1417 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1418 put_ebml_num(pb, size + 4, 0);
1419 // this assumes stream_index is less than 126
1420 avio_w8(pb, 0x80 | (pkt->stream_index + 1));
1421 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
1423 avio_write(pb, buffer, size);
1424 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1425 end_ebml_master(pb, blockgroup);
1427 *datap += line_size;
1433 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1440 dst = av_malloc(srclen);
1442 return AVERROR(ENOMEM);
1444 while (srclen >= WV_HEADER_SIZE) {
1447 ret = ff_wv_parse_header(&header, src);
1450 src += WV_HEADER_SIZE;
1451 srclen -= WV_HEADER_SIZE;
1453 if (srclen < header.blocksize) {
1454 ret = AVERROR_INVALIDDATA;
1458 if (header.initial) {
1459 AV_WL32(dst + offset, header.samples);
1462 AV_WL32(dst + offset, header.flags);
1463 AV_WL32(dst + offset + 4, header.crc);
1466 if (!(header.initial && header.final)) {
1467 AV_WL32(dst + offset, header.blocksize);
1471 memcpy(dst + offset, src, header.blocksize);
1472 src += header.blocksize;
1473 srclen -= header.blocksize;
1474 offset += header.blocksize;
1486 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1487 unsigned int blockid, AVPacket *pkt, int flags)
1489 MatroskaMuxContext *mkv = s->priv_data;
1490 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1491 uint8_t *data = NULL, *side_data = NULL;
1492 int offset = 0, size = pkt->size, side_data_size = 0;
1493 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1494 uint64_t additional_id = 0;
1495 int64_t discard_padding = 0;
1496 ebml_master block_group, block_additions, block_more;
1498 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1499 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1500 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1501 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1502 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1503 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1504 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1505 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1506 /* extradata is Annex B, assume the bitstream is too and convert it */
1507 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1508 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1509 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1511 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1517 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1518 /* Matroska specification requires to remove the first QuickTime atom
1524 side_data = av_packet_get_side_data(pkt,
1525 AV_PKT_DATA_SKIP_SAMPLES,
1528 if (side_data && side_data_size >= 10) {
1529 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1530 (AVRational){1, codec->sample_rate},
1531 (AVRational){1, 1000000000});
1534 side_data = av_packet_get_side_data(pkt,
1535 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1538 additional_id = AV_RB64(side_data);
1540 side_data_size -= 8;
1543 if ((side_data_size && additional_id == 1) || discard_padding) {
1544 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1545 blockid = MATROSKA_ID_BLOCK;
1548 put_ebml_id(pb, blockid);
1549 put_ebml_num(pb, size + 4, 0);
1550 // this assumes stream_index is less than 126
1551 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1552 avio_wb16(pb, ts - mkv->cluster_pts);
1554 avio_write(pb, data + offset, size);
1555 if (data != pkt->data)
1558 if (discard_padding) {
1559 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1562 if (side_data_size && additional_id == 1) {
1563 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1564 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1565 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1566 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1567 put_ebml_num(pb, side_data_size, 0);
1568 avio_write(pb, side_data, side_data_size);
1569 end_ebml_master(pb, block_more);
1570 end_ebml_master(pb, block_additions);
1572 if ((side_data_size && additional_id == 1) || discard_padding) {
1573 end_ebml_master(pb, block_group);
1577 static int srt_get_duration(uint8_t **buf)
1579 int i, duration = 0;
1581 for (i = 0; i < 2 && !duration; i++) {
1582 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1583 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1584 &s_hour, &s_min, &s_sec, &s_hsec,
1585 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1586 s_min += 60 * s_hour;
1587 e_min += 60 * e_hour;
1588 s_sec += 60 * s_min;
1590 e_sec += 60 * e_min;
1591 s_hsec += 1000 * s_sec;
1592 e_hsec += 1000 * e_sec;
1594 duration = e_hsec - s_hsec;
1596 *buf += ff_subtitles_next_line(*buf);
1601 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb,
1604 ebml_master blockgroup;
1605 AVPacket pkt2 = *pkt;
1606 int64_t duration = srt_get_duration(&pkt2.data);
1607 pkt2.size -= pkt2.data - pkt->data;
1609 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1610 mkv_blockgroup_size(pkt2.size));
1611 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1612 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1613 end_ebml_master(pb, blockgroup);
1618 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1620 MatroskaMuxContext *mkv = s->priv_data;
1621 ebml_master blockgroup;
1622 int id_size, settings_size, size;
1623 uint8_t *id, *settings;
1624 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1625 const int flags = 0;
1628 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1632 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1635 size = id_size + 1 + settings_size + 1 + pkt->size;
1637 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1638 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1639 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1641 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1643 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1644 put_ebml_num(pb, size + 4, 0);
1645 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1646 avio_wb16(pb, ts - mkv->cluster_pts);
1648 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1650 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1651 end_ebml_master(pb, blockgroup);
1653 return pkt->duration;
1656 static void mkv_flush_dynbuf(AVFormatContext *s)
1658 MatroskaMuxContext *mkv = s->priv_data;
1665 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1666 avio_write(s->pb, dyn_buf, bufsize);
1671 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1673 MatroskaMuxContext *mkv = s->priv_data;
1676 if (s->pb->seekable) {
1682 av_log(s, AV_LOG_DEBUG,
1683 "Starting new cluster at offset %" PRIu64 " bytes, "
1684 "pts %" PRIu64 "dts %" PRIu64 "\n",
1685 avio_tell(pb), pkt->pts, pkt->dts);
1686 end_ebml_master(pb, mkv->cluster);
1687 mkv->cluster_pos = -1;
1689 mkv_flush_dynbuf(s);
1693 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1695 MatroskaMuxContext *mkv = s->priv_data;
1696 AVIOContext *pb = s->pb;
1697 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1698 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1699 int duration = pkt->duration;
1701 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1702 int64_t relative_packet_pos;
1703 uint8_t *data_offset = pkt->data;
1704 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1706 if (ts == AV_NOPTS_VALUE) {
1707 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1708 return AVERROR(EINVAL);
1710 ts += mkv->tracks[pkt->stream_index].ts_offset;
1712 if (mkv->cluster_pos != -1) {
1713 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1714 if ((int16_t)cluster_time != cluster_time) {
1715 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1716 mkv_start_new_cluster(s, pkt);
1720 if (!s->pb->seekable) {
1722 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1723 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1730 if (mkv->cluster_pos == -1) {
1731 mkv->cluster_pos = avio_tell(s->pb);
1732 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1733 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1734 mkv->cluster_pts = FFMAX(0, ts);
1737 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1739 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1740 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1741 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1742 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1743 if (ret < 0) return ret;
1746 } else if (codec->codec_id == AV_CODEC_ID_SSA) {
1747 while (data_offset < pkt->data + pkt->size) {
1748 duration = mkv_write_ass_block(s, pb, pkt, &data_offset);
1749 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration);
1750 if (ret < 0) return ret;
1751 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1755 if (codec->codec_id == AV_CODEC_ID_SRT) {
1756 duration = mkv_write_srt_blocks(s, pb, pkt);
1757 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1758 duration = mkv_write_vtt_blocks(s, pb, pkt);
1760 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1761 mkv_blockgroup_size(pkt->size));
1762 /* For backward compatibility, prefer convergence_duration. */
1763 if (pkt->convergence_duration > 0) {
1764 duration = pkt->convergence_duration;
1766 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1767 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1768 end_ebml_master(pb, blockgroup);
1771 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1772 mkv->cluster_pos, relative_packet_pos, duration);
1777 mkv->duration = FFMAX(mkv->duration, ts + duration);
1781 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1783 MatroskaMuxContext *mkv = s->priv_data;
1784 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1785 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1787 int64_t cluster_time;
1789 int start_new_cluster;
1791 if (mkv->tracks[pkt->stream_index].write_dts)
1792 cluster_time = pkt->dts - mkv->cluster_pts;
1794 cluster_time = pkt->pts - mkv->cluster_pts;
1795 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1797 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1798 // after 4k and on a keyframe
1799 if (s->pb->seekable) {
1800 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1802 cluster_size = avio_tell(mkv->dyn_bc);
1805 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1806 // WebM DASH specification states that the first block of every cluster
1807 // has to be a key frame. So for DASH video, we only create a cluster
1808 // on seeing key frames.
1809 start_new_cluster = keyframe;
1810 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1811 cluster_time > mkv->cluster_time_limit) {
1812 // For DASH audio, we create a Cluster based on cluster_time_limit
1813 start_new_cluster = 1;
1814 } else if (!mkv->is_dash &&
1815 (cluster_size > mkv->cluster_size_limit ||
1816 cluster_time > mkv->cluster_time_limit ||
1817 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1818 cluster_size > 4 * 1024))) {
1819 start_new_cluster = 1;
1821 start_new_cluster = 0;
1824 if (mkv->cluster_pos != -1 && start_new_cluster) {
1825 mkv_start_new_cluster(s, pkt);
1828 // check if we have an audio packet cached
1829 if (mkv->cur_audio_pkt.size > 0) {
1830 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1831 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1832 mkv->is_dash ? start_new_cluster : 0);
1833 av_free_packet(&mkv->cur_audio_pkt);
1835 av_log(s, AV_LOG_ERROR,
1836 "Could not write cached audio packet ret:%d\n", ret);
1841 // buffer an audio packet to ensure the packet containing the video
1842 // keyframe's timecode is contained in the same cluster for WebM
1843 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1844 mkv->cur_audio_pkt = *pkt;
1846 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1847 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1849 ret = av_dup_packet(&mkv->cur_audio_pkt);
1850 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1851 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1854 ret = mkv_write_packet_internal(s, pkt, 0);
1858 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1860 MatroskaMuxContext *mkv = s->priv_data;
1862 if (s->pb->seekable)
1867 if (mkv->cluster_pos != -1) {
1868 av_log(s, AV_LOG_DEBUG,
1869 "Flushing cluster at offset %" PRIu64 " bytes\n",
1871 end_ebml_master(pb, mkv->cluster);
1872 mkv->cluster_pos = -1;
1874 mkv_flush_dynbuf(s);
1879 return mkv_write_packet(s, pkt);
1882 static int mkv_write_trailer(AVFormatContext *s)
1884 MatroskaMuxContext *mkv = s->priv_data;
1885 AVIOContext *pb = s->pb;
1886 int64_t currentpos, cuespos;
1889 // check if we have an audio packet cached
1890 if (mkv->cur_audio_pkt.size > 0) {
1891 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1892 av_free_packet(&mkv->cur_audio_pkt);
1894 av_log(s, AV_LOG_ERROR,
1895 "Could not write cached audio packet ret:%d\n", ret);
1901 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1902 mkv_flush_dynbuf(s);
1903 } else if (mkv->cluster_pos != -1) {
1904 end_ebml_master(pb, mkv->cluster);
1907 if (mkv->mode != MODE_WEBM) {
1908 ret = mkv_write_chapters(s);
1914 if (mkv->cues->num_entries) {
1915 if (mkv->reserve_cues_space) {
1918 currentpos = avio_tell(pb);
1919 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1921 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1922 cues_end = avio_tell(pb);
1923 if (cues_end > cuespos + mkv->reserve_cues_space) {
1924 av_log(s, AV_LOG_ERROR,
1925 "Insufficient space reserved for cues: %d "
1926 "(needed: %" PRId64 ").\n",
1927 mkv->reserve_cues_space, cues_end - cuespos);
1928 return AVERROR(EINVAL);
1931 if (cues_end < cuespos + mkv->reserve_cues_space)
1932 put_ebml_void(pb, mkv->reserve_cues_space -
1933 (cues_end - cuespos));
1935 avio_seek(pb, currentpos, SEEK_SET);
1937 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1940 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1946 mkv_write_seekhead(pb, mkv->main_seekhead);
1948 // update the duration
1949 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1950 currentpos = avio_tell(pb);
1951 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1952 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1954 avio_seek(pb, currentpos, SEEK_SET);
1957 end_ebml_master(pb, mkv->segment);
1958 av_freep(&mkv->tracks);
1959 av_freep(&mkv->cues->entries);
1960 av_freep(&mkv->cues);
1965 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1968 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1969 if (ff_mkv_codec_tags[i].id == codec_id)
1972 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1973 enum AVMediaType type = avcodec_get_type(codec_id);
1974 // mkv theoretically supports any video/audio through VFW/ACM
1975 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1982 static const AVCodecTag additional_audio_tags[] = {
1983 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1984 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1985 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1986 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1987 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1988 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1989 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1990 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1991 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1992 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1993 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1994 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1995 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1998 static const AVCodecTag additional_video_tags[] = {
1999 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2000 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2001 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2002 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2003 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2004 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2007 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2008 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2009 static const AVOption options[] = {
2010 { "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 },
2011 { "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 },
2012 { "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 },
2013 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2014 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2018 #if CONFIG_MATROSKA_MUXER
2019 static const AVClass matroska_class = {
2020 .class_name = "matroska muxer",
2021 .item_name = av_default_item_name,
2023 .version = LIBAVUTIL_VERSION_INT,
2026 AVOutputFormat ff_matroska_muxer = {
2028 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2029 .mime_type = "video/x-matroska",
2030 .extensions = "mkv",
2031 .priv_data_size = sizeof(MatroskaMuxContext),
2032 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2033 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2034 .video_codec = CONFIG_LIBX264_ENCODER ?
2035 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2036 .write_header = mkv_write_header,
2037 .write_packet = mkv_write_flush_packet,
2038 .write_trailer = mkv_write_trailer,
2039 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2040 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2041 .codec_tag = (const AVCodecTag* const []){
2042 ff_codec_bmp_tags, ff_codec_wav_tags,
2043 additional_audio_tags, additional_video_tags, 0
2046 .subtitle_codec = AV_CODEC_ID_SSA,
2048 .subtitle_codec = AV_CODEC_ID_ASS,
2050 .query_codec = mkv_query_codec,
2051 .priv_class = &matroska_class,
2055 #if CONFIG_WEBM_MUXER
2056 static const AVClass webm_class = {
2057 .class_name = "webm muxer",
2058 .item_name = av_default_item_name,
2060 .version = LIBAVUTIL_VERSION_INT,
2063 AVOutputFormat ff_webm_muxer = {
2065 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2066 .mime_type = "video/webm",
2067 .extensions = "webm",
2068 .priv_data_size = sizeof(MatroskaMuxContext),
2069 .audio_codec = AV_CODEC_ID_VORBIS,
2070 .video_codec = AV_CODEC_ID_VP8,
2071 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2072 .write_header = mkv_write_header,
2073 .write_packet = mkv_write_flush_packet,
2074 .write_trailer = mkv_write_trailer,
2075 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2076 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2077 .priv_class = &webm_class,
2081 #if CONFIG_MATROSKA_AUDIO_MUXER
2082 static const AVClass mka_class = {
2083 .class_name = "matroska audio muxer",
2084 .item_name = av_default_item_name,
2086 .version = LIBAVUTIL_VERSION_INT,
2088 AVOutputFormat ff_matroska_audio_muxer = {
2090 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2091 .mime_type = "audio/x-matroska",
2092 .extensions = "mka",
2093 .priv_data_size = sizeof(MatroskaMuxContext),
2094 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2095 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2096 .video_codec = AV_CODEC_ID_NONE,
2097 .write_header = mkv_write_header,
2098 .write_packet = mkv_write_flush_packet,
2099 .write_trailer = mkv_write_trailer,
2100 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2102 .codec_tag = (const AVCodecTag* const []){
2103 ff_codec_wav_tags, additional_audio_tags, 0
2105 .priv_class = &mka_class,