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"
49 #include "libavutil/stereo3d.h"
51 #include "libavcodec/xiph.h"
52 #include "libavcodec/mpeg4audio.h"
53 #include "libavcodec/internal.h"
55 typedef struct ebml_master {
56 int64_t pos; ///< absolute offset in the file where the master's elements start
57 int sizebytes; ///< how many bytes were reserved for the size
60 typedef struct mkv_seekhead_entry {
61 unsigned int elementid;
65 typedef struct mkv_seekhead {
67 int64_t segment_offset; ///< the file offset to the beginning of the segment
68 int reserved_size; ///< -1 if appending to file
70 mkv_seekhead_entry *entries;
74 typedef struct mkv_cuepoint {
78 int64_t cluster_pos; ///< file offset of the cluster containing the block
79 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
80 int64_t duration; ///< duration of the block according to time base
83 typedef struct mkv_cues {
84 int64_t segment_offset;
85 mkv_cuepoint *entries;
89 typedef struct mkv_track {
95 #define MODE_MATROSKAv2 0x01
96 #define MODE_WEBM 0x02
98 typedef struct MatroskaMuxContext {
103 int64_t segment_offset;
105 int64_t cluster_pos; ///< file offset of the current cluster
107 int64_t duration_offset;
109 mkv_seekhead *main_seekhead;
113 AVPacket cur_audio_pkt;
115 int have_attachments;
117 int reserve_cues_space;
118 int cluster_size_limit;
120 int64_t cluster_time_limit;
122 int dash_track_number;
124 uint32_t chapter_id_offset;
128 } MatroskaMuxContext;
131 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
132 * offset, 4 bytes for target EBML ID */
133 #define MAX_SEEKENTRY_SIZE 21
135 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
137 #define MAX_CUETRACKPOS_SIZE 42
139 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
140 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
142 /** Seek preroll value for opus */
143 #define OPUS_SEEK_PREROLL 80000000
145 static int ebml_id_size(unsigned int id)
147 return (av_log2(id + 1) - 1) / 7 + 1;
150 static void put_ebml_id(AVIOContext *pb, unsigned int id)
152 int i = ebml_id_size(id);
154 avio_w8(pb, (uint8_t)(id >> (i * 8)));
158 * Write an EBML size meaning "unknown size".
160 * @param bytes The number of bytes the size should occupy (maximum: 8).
162 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
164 av_assert0(bytes <= 8);
165 avio_w8(pb, 0x1ff >> bytes);
166 ffio_fill(pb, 0xff, bytes - 1);
170 * Calculate how many bytes are needed to represent a given number in EBML.
172 static int ebml_num_size(uint64_t num)
175 while ((num + 1) >> bytes * 7)
181 * Write a number in EBML variable length format.
183 * @param bytes The number of bytes that need to be used to write the number.
184 * If zero, any number of bytes can be used.
186 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
188 int i, needed_bytes = ebml_num_size(num);
190 // sizes larger than this are currently undefined in EBML
191 av_assert0(num < (1ULL << 56) - 1);
194 // don't care how many bytes are used, so use the min
195 bytes = needed_bytes;
196 // the bytes needed to write the given size would exceed the bytes
197 // that we need to use, so write unknown size. This shouldn't happen.
198 av_assert0(bytes >= needed_bytes);
200 num |= 1ULL << bytes * 7;
201 for (i = bytes - 1; i >= 0; i--)
202 avio_w8(pb, (uint8_t)(num >> i * 8));
205 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
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_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
221 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
223 while (tmp>>=8) bytes++;
225 put_ebml_id(pb, elementid);
226 put_ebml_num(pb, bytes, 0);
227 for (i = bytes - 1; i >= 0; i--)
228 avio_w8(pb, (uint8_t)(val >> i * 8));
231 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
233 put_ebml_id(pb, elementid);
234 put_ebml_num(pb, 8, 0);
235 avio_wb64(pb, av_double2int(val));
238 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
239 const void *buf, int size)
241 put_ebml_id(pb, elementid);
242 put_ebml_num(pb, size, 0);
243 avio_write(pb, buf, size);
246 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
249 put_ebml_binary(pb, elementid, str, strlen(str));
253 * Write a void element of a given size. Useful for reserving space in
254 * the file to be written to later.
256 * @param size The number of bytes to reserve, which must be at least 2.
258 static void put_ebml_void(AVIOContext *pb, uint64_t size)
260 int64_t currentpos = avio_tell(pb);
262 av_assert0(size >= 2);
264 put_ebml_id(pb, EBML_ID_VOID);
265 // we need to subtract the length needed to store the size from the
266 // size we need to reserve so 2 cases, we use 8 bytes to store the
267 // size if possible, 1 byte otherwise
269 put_ebml_num(pb, size - 1, 0);
271 put_ebml_num(pb, size - 9, 8);
272 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
275 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
276 uint64_t expectedsize)
278 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
279 put_ebml_id(pb, elementid);
280 put_ebml_size_unknown(pb, bytes);
281 return (ebml_master) {avio_tell(pb), bytes };
284 static void end_ebml_master(AVIOContext *pb, ebml_master master)
286 int64_t pos = avio_tell(pb);
288 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
290 put_ebml_num(pb, pos - master.pos, master.sizebytes);
291 avio_seek(pb, pos, SEEK_SET);
294 static void put_xiph_size(AVIOContext *pb, int size)
296 ffio_fill(pb, 255, size / 255);
297 avio_w8(pb, size % 255);
301 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
302 * elements. If a maximum number of elements is specified, enough space
303 * will be reserved at the current file location to write a seek head of
306 * @param segment_offset The absolute offset to the position in the file
307 * where the segment begins.
308 * @param numelements The maximum number of elements that will be indexed
309 * by this seek head, 0 if unlimited.
311 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
314 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
318 new_seekhead->segment_offset = segment_offset;
320 if (numelements > 0) {
321 new_seekhead->filepos = avio_tell(pb);
322 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
323 // and size, and 3 bytes to guarantee that an EBML void element
324 // will fit afterwards
325 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
326 new_seekhead->max_entries = numelements;
327 put_ebml_void(pb, new_seekhead->reserved_size);
332 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
334 mkv_seekhead_entry *entries = seekhead->entries;
336 // don't store more elements than we reserved space for
337 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
340 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
342 return AVERROR(ENOMEM);
343 seekhead->entries = entries;
345 seekhead->entries[seekhead->num_entries].elementid = elementid;
346 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
352 * Write the seek head to the file and free it. If a maximum number of
353 * elements was specified to mkv_start_seekhead(), the seek head will
354 * be written at the location reserved for it. Otherwise, it is written
355 * at the current location in the file.
357 * @return The file offset where the seekhead was written,
358 * -1 if an error occurred.
360 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
362 ebml_master metaseek, seekentry;
366 currentpos = avio_tell(pb);
368 if (seekhead->reserved_size > 0) {
369 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
375 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
376 for (i = 0; i < seekhead->num_entries; i++) {
377 mkv_seekhead_entry *entry = &seekhead->entries[i];
379 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
381 put_ebml_id(pb, MATROSKA_ID_SEEKID);
382 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
383 put_ebml_id(pb, entry->elementid);
385 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
386 end_ebml_master(pb, seekentry);
388 end_ebml_master(pb, metaseek);
390 if (seekhead->reserved_size > 0) {
391 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
392 put_ebml_void(pb, remaining);
393 avio_seek(pb, currentpos, SEEK_SET);
395 currentpos = seekhead->filepos;
398 av_freep(&seekhead->entries);
404 static mkv_cues *mkv_start_cues(int64_t segment_offset)
406 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
410 cues->segment_offset = segment_offset;
414 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
415 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
417 mkv_cuepoint *entries = cues->entries;
422 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
424 return AVERROR(ENOMEM);
425 cues->entries = entries;
427 cues->entries[cues->num_entries].pts = ts;
428 cues->entries[cues->num_entries].stream_idx = stream;
429 cues->entries[cues->num_entries].tracknum = tracknum;
430 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
431 cues->entries[cues->num_entries].relative_pos = relative_pos;
432 cues->entries[cues->num_entries++].duration = duration;
437 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
439 AVIOContext *pb = s->pb;
440 ebml_master cues_element;
444 currentpos = avio_tell(pb);
445 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
447 for (i = 0; i < cues->num_entries; i++) {
448 ebml_master cuepoint, track_positions;
449 mkv_cuepoint *entry = &cues->entries[i];
450 uint64_t pts = entry->pts;
453 // Calculate the number of entries, so we know the element size
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;
465 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
466 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
468 // put all the entries from different tracks that have the exact same
469 // timestamp into the same CuePoint
470 for (j = 0; j < num_tracks; j++)
471 tracks[j].has_cue = 0;
472 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
473 int tracknum = entry[j].stream_idx;
474 av_assert0(tracknum>=0 && tracknum<num_tracks);
475 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
477 tracks[tracknum].has_cue = 1;
478 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
479 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
480 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
481 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
482 if (entry[j].duration != -1)
483 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
484 end_ebml_master(pb, track_positions);
487 end_ebml_master(pb, cuepoint);
489 end_ebml_master(pb, cues_element);
494 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
496 const uint8_t *header_start[3];
498 int first_header_size;
501 if (codec->codec_id == AV_CODEC_ID_VORBIS)
502 first_header_size = 30;
504 first_header_size = 42;
506 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
507 first_header_size, header_start, header_len) < 0) {
508 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
512 avio_w8(pb, 2); // number packets - 1
513 for (j = 0; j < 2; j++) {
514 put_xiph_size(pb, header_len[j]);
516 for (j = 0; j < 3; j++)
517 avio_write(pb, header_start[j], header_len[j]);
522 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
524 if (codec->extradata && codec->extradata_size == 2)
525 avio_write(pb, codec->extradata, 2);
527 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
531 static int put_flac_codecpriv(AVFormatContext *s,
532 AVIOContext *pb, AVCodecContext *codec)
534 int write_comment = (codec->channel_layout &&
535 !(codec->channel_layout & ~0x3ffffULL) &&
536 !ff_flac_is_native_layout(codec->channel_layout));
537 int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
544 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
545 "Lavf" : LIBAVFORMAT_IDENT;
546 AVDictionary *dict = NULL;
547 uint8_t buf[32], *data, *p;
550 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
551 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
553 len = ff_vorbiscomment_length(dict, vendor);
554 data = av_malloc(len + 4);
557 return AVERROR(ENOMEM);
561 AV_WB24(data + 1, len);
564 ff_vorbiscomment_write(&p, &dict, vendor);
566 avio_write(pb, data, len + 4);
575 static int get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec,
576 int *sample_rate, int *output_sample_rate)
578 MPEG4AudioConfig mp4ac;
580 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
581 codec->extradata_size * 8, 1) < 0) {
582 av_log(s, AV_LOG_ERROR,
583 "Error parsing AAC extradata, unable to determine samplerate.\n");
584 return AVERROR(EINVAL);
587 *sample_rate = mp4ac.sample_rate;
588 *output_sample_rate = mp4ac.ext_sample_rate;
592 static int mkv_write_native_codecprivate(AVFormatContext *s,
593 AVCodecContext *codec,
596 switch (codec->codec_id) {
597 case AV_CODEC_ID_VORBIS:
598 case AV_CODEC_ID_THEORA:
599 return put_xiph_codecpriv(s, dyn_cp, codec);
600 case AV_CODEC_ID_FLAC:
601 return put_flac_codecpriv(s, dyn_cp, codec);
602 case AV_CODEC_ID_WAVPACK:
603 return put_wv_codecpriv(dyn_cp, codec);
604 case AV_CODEC_ID_H264:
605 return ff_isom_write_avcc(dyn_cp, codec->extradata,
606 codec->extradata_size);
607 case AV_CODEC_ID_HEVC:
608 ff_isom_write_hvcc(dyn_cp, codec->extradata,
609 codec->extradata_size, 0);
611 case AV_CODEC_ID_ALAC:
612 if (codec->extradata_size < 36) {
613 av_log(s, AV_LOG_ERROR,
614 "Invalid extradata found, ALAC expects a 36-byte "
616 return AVERROR_INVALIDDATA;
618 avio_write(dyn_cp, codec->extradata + 12,
619 codec->extradata_size - 12);
622 if (codec->codec_id == AV_CODEC_ID_PRORES &&
623 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
624 avio_wl32(dyn_cp, codec->codec_tag);
625 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
626 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
632 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
633 AVCodecContext *codec, int native_id,
638 int ret, codecpriv_size;
640 ret = avio_open_dyn_buf(&dyn_cp);
645 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
646 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
648 if (!codec->codec_tag)
649 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
651 if (codec->extradata_size) {
652 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
653 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
656 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
657 avio_wl32(dyn_cp, codec->codec_tag);
658 for(i = 0; i < 0x5a - 8; i++)
661 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
664 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
665 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
666 avcodec_get_name(codec->codec_id));
668 if (!codec->codec_tag)
669 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
671 if (!codec->codec_tag && codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
672 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
673 avcodec_get_name(codec->codec_id));
674 ret = AVERROR(EINVAL);
677 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
679 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
681 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
683 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
684 avcodec_get_name(codec->codec_id));
685 ret = AVERROR(EINVAL);
687 if (!codec->codec_tag)
688 codec->codec_tag = tag;
690 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
693 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
695 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
702 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
703 AVStream *st, int mode, int *h_width, int *h_height)
707 AVDictionaryEntry *tag;
708 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
712 // convert metadata into proper side data and add it to the stream
713 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
714 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
715 int stereo_mode = atoi(tag->value);
717 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
718 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
723 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
724 stereo_mode != 10 && stereo_mode != 12) {
725 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
731 // iterate to find the stereo3d side data
732 for (i = 0; i < st->nb_side_data; i++) {
733 AVPacketSideData sd = st->side_data[i];
734 if (sd.type == AV_PKT_DATA_STEREO3D) {
735 AVStereo3D *stereo = (AVStereo3D *)sd.data;
737 switch (stereo->type) {
739 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
741 case AV_STEREO3D_SIDEBYSIDE:
742 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
743 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
744 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
747 case AV_STEREO3D_TOPBOTTOM:
748 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
749 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
753 case AV_STEREO3D_CHECKERBOARD:
754 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
755 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
758 case AV_STEREO3D_LINES:
759 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
760 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
764 case AV_STEREO3D_COLUMNS:
765 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
766 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
770 case AV_STEREO3D_FRAMESEQUENCE:
771 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
772 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
780 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
783 // if webm, do not write unsupported modes
784 if ((mode == MODE_WEBM &&
785 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
786 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
787 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
788 av_log(s, AV_LOG_ERROR,
789 "The specified stereo mode is not valid.\n");
790 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
791 return AVERROR(EINVAL);
794 // write StereoMode if format is valid
795 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
800 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
801 int i, AVIOContext *pb, int default_stream_exists)
803 AVStream *st = s->streams[i];
804 AVCodecContext *codec = st->codec;
805 ebml_master subinfo, track;
808 int bit_depth = av_get_bits_per_sample(codec->codec_id);
809 int sample_rate = codec->sample_rate;
810 int output_sample_rate = 0;
811 int display_width_div = 1;
812 int display_height_div = 1;
814 AVDictionaryEntry *tag;
816 // ms precision is the de-facto standard timescale for mkv files
817 avpriv_set_pts_info(st, 64, 1, 1000);
819 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
820 mkv->have_attachments = 1;
824 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
825 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
827 bit_depth = codec->bits_per_coded_sample;
829 if (codec->codec_id == AV_CODEC_ID_AAC) {
830 ret = get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
835 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
836 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
837 mkv->is_dash ? mkv->dash_track_number : i + 1);
838 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
839 mkv->is_dash ? mkv->dash_track_number : i + 1);
840 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
842 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
843 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
844 tag = av_dict_get(st->metadata, "language", NULL, 0);
845 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
846 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
847 } else if (tag && tag->value) {
848 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
851 // The default value for TRACKFLAGDEFAULT is 1, so add element
852 // if we need to clear it.
853 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
854 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
856 if (st->disposition & AV_DISPOSITION_FORCED)
857 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
859 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
860 const char *codec_id;
861 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
862 codec_id = "D_WEBVTT/CAPTIONS";
863 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
864 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
865 codec_id = "D_WEBVTT/DESCRIPTIONS";
866 native_id = MATROSKA_TRACK_TYPE_METADATA;
867 } else if (st->disposition & AV_DISPOSITION_METADATA) {
868 codec_id = "D_WEBVTT/METADATA";
869 native_id = MATROSKA_TRACK_TYPE_METADATA;
871 codec_id = "D_WEBVTT/SUBTITLES";
872 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
874 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
876 // look for a codec ID string specific to mkv to use,
877 // if none are found, use AVI codes
878 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
879 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
880 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
885 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->codec_tag) {
886 if (mkv->allow_raw_vfw) {
889 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
890 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
891 return AVERROR(EINVAL);
896 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding && codec->codec_id == AV_CODEC_ID_OPUS) {
897 // mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
898 // (AVRational){ 1, codec->sample_rate },
901 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
902 av_rescale_q(codec->initial_padding,
903 (AVRational){ 1, codec->sample_rate },
904 (AVRational){ 1, 1000000000 }));
906 if (codec->codec_id == AV_CODEC_ID_OPUS) {
907 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
910 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
911 codec->codec_id == AV_CODEC_ID_VP9 ||
912 codec->codec_id == AV_CODEC_ID_OPUS ||
913 codec->codec_id == AV_CODEC_ID_VORBIS ||
914 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
915 av_log(s, AV_LOG_ERROR,
916 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
917 return AVERROR(EINVAL);
920 switch (codec->codec_type) {
921 case AVMEDIA_TYPE_VIDEO:
922 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
924 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
925 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
926 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
928 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
931 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
932 ((!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) && codec->codec_id != AV_CODEC_ID_RAWVIDEO) ||
933 codec->codec_id == AV_CODEC_ID_SVQ1 ||
934 codec->codec_id == AV_CODEC_ID_SVQ3 ||
935 codec->codec_id == AV_CODEC_ID_CINEPAK))
939 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
940 else if (!native_id) {
941 // if there is no mkv-specific codec ID, use VFW mode
942 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
943 mkv->tracks[i].write_dts = 1;
946 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
947 // XXX: interlace flag?
948 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
949 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
951 // check both side data and metadata for stereo information,
952 // write the result to the bitstream if any is found
953 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
955 &display_height_div);
959 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
960 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
961 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
962 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
965 // write DisplayWidth and DisplayHeight, they contain the size of
966 // a single source view and/or the display aspect ratio
967 if (st->sample_aspect_ratio.num) {
968 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
969 if (d_width > INT_MAX) {
970 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
971 return AVERROR(EINVAL);
973 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
974 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
975 } else if (display_width_div != 1 || display_height_div != 1) {
976 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
977 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
980 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
981 uint32_t color_space = av_le2ne32(codec->codec_tag);
982 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
985 end_ebml_master(pb, subinfo);
988 case AVMEDIA_TYPE_AUDIO:
989 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
992 // no mkv-specific ID, use ACM mode
993 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
995 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
996 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
997 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
998 if (output_sample_rate)
999 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1001 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1002 end_ebml_master(pb, subinfo);
1005 case AVMEDIA_TYPE_SUBTITLE:
1007 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
1008 return AVERROR(ENOSYS);
1011 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
1012 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1014 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1017 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1018 return AVERROR(EINVAL);
1021 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1022 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1027 end_ebml_master(pb, track);
1032 static int mkv_write_tracks(AVFormatContext *s)
1034 MatroskaMuxContext *mkv = s->priv_data;
1035 AVIOContext *pb = s->pb;
1037 int i, ret, default_stream_exists = 0;
1039 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1043 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1044 for (i = 0; i < s->nb_streams; i++) {
1045 AVStream *st = s->streams[i];
1046 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1048 for (i = 0; i < s->nb_streams; i++) {
1049 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1053 end_ebml_master(pb, tracks);
1057 static int mkv_write_chapters(AVFormatContext *s)
1059 MatroskaMuxContext *mkv = s->priv_data;
1060 AVIOContext *pb = s->pb;
1061 ebml_master chapters, editionentry;
1062 AVRational scale = {1, 1E9};
1065 if (!s->nb_chapters || mkv->wrote_chapters)
1068 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1069 if (ret < 0) return ret;
1071 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1072 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1073 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1074 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1075 for (i = 0; i < s->nb_chapters; i++) {
1076 ebml_master chapteratom, chapterdisplay;
1077 AVChapter *c = s->chapters[i];
1078 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1079 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1080 AVDictionaryEntry *t = NULL;
1081 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1082 av_log(s, AV_LOG_ERROR,
1083 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1084 chapterstart, chapterend);
1085 return AVERROR_INVALIDDATA;
1088 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1089 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1090 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1091 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1092 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1093 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1094 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1095 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1096 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1097 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1098 end_ebml_master(pb, chapterdisplay);
1100 end_ebml_master(pb, chapteratom);
1102 end_ebml_master(pb, editionentry);
1103 end_ebml_master(pb, chapters);
1105 mkv->wrote_chapters = 1;
1109 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1111 uint8_t *key = av_strdup(t->key);
1113 const uint8_t *lang = NULL;
1117 return AVERROR(ENOMEM);
1119 if ((p = strrchr(p, '-')) &&
1120 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1127 else if (*p >= 'a' && *p <= 'z')
1132 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1133 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1135 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1136 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1137 end_ebml_master(pb, tag);
1143 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1144 unsigned int uid, ebml_master *tags)
1146 MatroskaMuxContext *mkv = s->priv_data;
1147 ebml_master tag, targets;
1148 AVDictionaryEntry *t = NULL;
1152 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1153 if (ret < 0) return ret;
1155 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1158 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1159 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1161 put_ebml_uint(s->pb, elementid, uid);
1162 end_ebml_master(s->pb, targets);
1164 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1165 if (av_strcasecmp(t->key, "title") &&
1166 av_strcasecmp(t->key, "stereo_mode") &&
1167 av_strcasecmp(t->key, "encoding_tool")) {
1168 ret = mkv_write_simpletag(s->pb, t);
1174 end_ebml_master(s->pb, tag);
1178 static int mkv_check_tag(AVDictionary *m)
1180 AVDictionaryEntry *t = NULL;
1182 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1183 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1189 static int mkv_write_tags(AVFormatContext *s)
1191 MatroskaMuxContext *mkv = s->priv_data;
1192 ebml_master tags = {0};
1195 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1197 if (mkv_check_tag(s->metadata)) {
1198 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1199 if (ret < 0) return ret;
1202 for (i = 0; i < s->nb_streams; i++) {
1203 AVStream *st = s->streams[i];
1205 if (!mkv_check_tag(st->metadata))
1208 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1209 if (ret < 0) return ret;
1212 for (i = 0; i < s->nb_chapters; i++) {
1213 AVChapter *ch = s->chapters[i];
1215 if (!mkv_check_tag(ch->metadata))
1218 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1219 if (ret < 0) return ret;
1223 end_ebml_master(s->pb, tags);
1227 static int mkv_write_attachments(AVFormatContext *s)
1229 MatroskaMuxContext *mkv = s->priv_data;
1230 AVIOContext *pb = s->pb;
1231 ebml_master attachments;
1235 if (!mkv->have_attachments)
1238 av_lfg_init(&c, av_get_random_seed());
1240 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1241 if (ret < 0) return ret;
1243 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1245 for (i = 0; i < s->nb_streams; i++) {
1246 AVStream *st = s->streams[i];
1247 ebml_master attached_file;
1248 AVDictionaryEntry *t;
1249 const char *mimetype = NULL;
1252 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1255 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1257 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1258 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1259 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1260 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1261 return AVERROR(EINVAL);
1263 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1264 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1265 mimetype = t->value;
1266 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1268 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1269 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1270 mimetype = ff_mkv_mime_tags[i].str;
1275 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1276 "it cannot be deduced from the codec id.\n", i);
1277 return AVERROR(EINVAL);
1280 if (s->flags & AVFMT_FLAG_BITEXACT) {
1281 struct AVSHA *sha = av_sha_alloc();
1284 return AVERROR(ENOMEM);
1285 av_sha_init(sha, 160);
1286 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1287 av_sha_final(sha, digest);
1289 fileuid = AV_RL64(digest);
1291 fileuid = av_lfg_get(&c);
1293 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1296 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1297 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1298 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1299 end_ebml_master(pb, attached_file);
1301 end_ebml_master(pb, attachments);
1306 static int mkv_write_header(AVFormatContext *s)
1308 MatroskaMuxContext *mkv = s->priv_data;
1309 AVIOContext *pb = s->pb;
1310 ebml_master ebml_header, segment_info;
1311 AVDictionaryEntry *tag;
1312 int ret, i, version = 2;
1314 if (!strcmp(s->oformat->name, "webm"))
1315 mkv->mode = MODE_WEBM;
1317 mkv->mode = MODE_MATROSKAv2;
1319 if (s->avoid_negative_ts < 0)
1320 s->avoid_negative_ts = 1;
1322 if (mkv->mode != MODE_WEBM ||
1323 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1324 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1327 for (i = 0; i < s->nb_streams; i++) {
1328 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1329 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1330 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1331 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1332 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1333 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1334 av_log(s, AV_LOG_ERROR,
1335 "The Matroska muxer does not yet support muxing %s\n",
1336 avcodec_get_name(s->streams[i]->codec->codec_id));
1337 return AVERROR_PATCHWELCOME;
1339 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1340 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1341 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1345 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1347 return AVERROR(ENOMEM);
1349 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1350 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1351 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1352 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1353 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1354 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1355 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1356 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1357 end_ebml_master(pb, ebml_header);
1359 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1360 mkv->segment_offset = avio_tell(pb);
1362 // we write 2 seek heads - one at the end of the file to point to each
1363 // cluster, and one at the beginning to point to all other level one
1364 // elements (including the seek head at the end of the file), which
1365 // isn't more than 10 elements if we only write one of each other
1366 // currently defined level 1 element
1367 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1368 if (!mkv->main_seekhead)
1369 return AVERROR(ENOMEM);
1371 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1372 if (ret < 0) return ret;
1374 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1375 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1376 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1377 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1378 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1379 uint32_t segment_uid[4];
1382 av_lfg_init(&lfg, av_get_random_seed());
1384 for (i = 0; i < 4; i++)
1385 segment_uid[i] = av_lfg_get(&lfg);
1387 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1388 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1389 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1391 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1392 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1394 const char *ident = "Lavf";
1395 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1396 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1399 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1400 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1401 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1402 uint8_t date_utc_buf[8];
1403 AV_WB64(date_utc_buf, date_utc);
1404 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1407 // reserve space for the duration
1409 mkv->duration_offset = avio_tell(pb);
1410 put_ebml_void(pb, 11); // assumes double-precision float to be written
1411 end_ebml_master(pb, segment_info);
1413 ret = mkv_write_tracks(s);
1417 for (i = 0; i < s->nb_chapters; i++)
1418 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1420 if (mkv->mode != MODE_WEBM) {
1421 ret = mkv_write_chapters(s);
1425 ret = mkv_write_tags(s);
1429 ret = mkv_write_attachments(s);
1434 if (!s->pb->seekable)
1435 mkv_write_seekhead(pb, mkv->main_seekhead);
1437 mkv->cues = mkv_start_cues(mkv->segment_offset);
1439 return AVERROR(ENOMEM);
1441 if (pb->seekable && mkv->reserve_cues_space) {
1442 mkv->cues_pos = avio_tell(pb);
1443 put_ebml_void(pb, mkv->reserve_cues_space);
1446 av_init_packet(&mkv->cur_audio_pkt);
1447 mkv->cur_audio_pkt.size = 0;
1448 mkv->cluster_pos = -1;
1452 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1453 // after 4k and on a keyframe
1455 if (mkv->cluster_time_limit < 0)
1456 mkv->cluster_time_limit = 5000;
1457 if (mkv->cluster_size_limit < 0)
1458 mkv->cluster_size_limit = 5 * 1024 * 1024;
1460 if (mkv->cluster_time_limit < 0)
1461 mkv->cluster_time_limit = 1000;
1462 if (mkv->cluster_size_limit < 0)
1463 mkv->cluster_size_limit = 32 * 1024;
1469 static int mkv_blockgroup_size(int pkt_size)
1471 int size = pkt_size + 4;
1472 size += ebml_num_size(size);
1473 size += 2; // EBML ID for block and block duration
1474 size += 8; // max size of block duration
1475 size += ebml_num_size(size);
1476 size += 1; // blockgroup EBML ID
1480 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1487 dst = av_malloc(srclen);
1489 return AVERROR(ENOMEM);
1491 while (srclen >= WV_HEADER_SIZE) {
1494 ret = ff_wv_parse_header(&header, src);
1497 src += WV_HEADER_SIZE;
1498 srclen -= WV_HEADER_SIZE;
1500 if (srclen < header.blocksize) {
1501 ret = AVERROR_INVALIDDATA;
1505 if (header.initial) {
1506 AV_WL32(dst + offset, header.samples);
1509 AV_WL32(dst + offset, header.flags);
1510 AV_WL32(dst + offset + 4, header.crc);
1513 if (!(header.initial && header.final)) {
1514 AV_WL32(dst + offset, header.blocksize);
1518 memcpy(dst + offset, src, header.blocksize);
1519 src += header.blocksize;
1520 srclen -= header.blocksize;
1521 offset += header.blocksize;
1533 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1534 unsigned int blockid, AVPacket *pkt, int flags)
1536 MatroskaMuxContext *mkv = s->priv_data;
1537 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1538 uint8_t *data = NULL, *side_data = NULL;
1539 int offset = 0, size = pkt->size, side_data_size = 0;
1540 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1541 uint64_t additional_id = 0;
1542 int64_t discard_padding = 0;
1543 ebml_master block_group, block_additions, block_more;
1545 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1546 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1547 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1548 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1549 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1550 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1551 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1552 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1553 /* extradata is Annex B, assume the bitstream is too and convert it */
1554 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1555 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1556 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1558 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1564 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1565 /* Matroska specification requires to remove the first QuickTime atom
1571 side_data = av_packet_get_side_data(pkt,
1572 AV_PKT_DATA_SKIP_SAMPLES,
1575 if (side_data && side_data_size >= 10) {
1576 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1577 (AVRational){1, codec->sample_rate},
1578 (AVRational){1, 1000000000});
1581 side_data = av_packet_get_side_data(pkt,
1582 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1585 additional_id = AV_RB64(side_data);
1587 side_data_size -= 8;
1590 if ((side_data_size && additional_id == 1) || discard_padding) {
1591 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1592 blockid = MATROSKA_ID_BLOCK;
1595 put_ebml_id(pb, blockid);
1596 put_ebml_num(pb, size + 4, 0);
1597 // this assumes stream_index is less than 126
1598 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1599 avio_wb16(pb, ts - mkv->cluster_pts);
1601 avio_write(pb, data + offset, size);
1602 if (data != pkt->data)
1605 if (discard_padding) {
1606 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1609 if (side_data_size && additional_id == 1) {
1610 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1611 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1612 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1613 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1614 put_ebml_num(pb, side_data_size, 0);
1615 avio_write(pb, side_data, side_data_size);
1616 end_ebml_master(pb, block_more);
1617 end_ebml_master(pb, block_additions);
1619 if ((side_data_size && additional_id == 1) || discard_padding) {
1620 end_ebml_master(pb, block_group);
1624 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1626 MatroskaMuxContext *mkv = s->priv_data;
1627 ebml_master blockgroup;
1628 int id_size, settings_size, size;
1629 uint8_t *id, *settings;
1630 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1631 const int flags = 0;
1634 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1638 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1641 size = id_size + 1 + settings_size + 1 + pkt->size;
1643 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1644 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1645 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1647 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1649 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1650 put_ebml_num(pb, size + 4, 0);
1651 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1652 avio_wb16(pb, ts - mkv->cluster_pts);
1654 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1656 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1657 end_ebml_master(pb, blockgroup);
1659 return pkt->duration;
1662 static void mkv_flush_dynbuf(AVFormatContext *s)
1664 MatroskaMuxContext *mkv = s->priv_data;
1671 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1672 avio_write(s->pb, dyn_buf, bufsize);
1677 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1679 MatroskaMuxContext *mkv = s->priv_data;
1682 if (s->pb->seekable) {
1688 av_log(s, AV_LOG_DEBUG,
1689 "Starting new cluster at offset %" PRIu64 " bytes, "
1690 "pts %" PRIu64 "dts %" PRIu64 "\n",
1691 avio_tell(pb), pkt->pts, pkt->dts);
1692 end_ebml_master(pb, mkv->cluster);
1693 mkv->cluster_pos = -1;
1695 mkv_flush_dynbuf(s);
1699 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1701 MatroskaMuxContext *mkv = s->priv_data;
1702 AVIOContext *pb = s->pb;
1703 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1704 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1705 int duration = pkt->duration;
1707 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1708 int64_t relative_packet_pos;
1709 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1711 if (ts == AV_NOPTS_VALUE) {
1712 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1713 return AVERROR(EINVAL);
1715 ts += mkv->tracks[pkt->stream_index].ts_offset;
1717 if (mkv->cluster_pos != -1) {
1718 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1719 if ((int16_t)cluster_time != cluster_time) {
1720 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1721 mkv_start_new_cluster(s, pkt);
1725 if (!s->pb->seekable) {
1727 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1729 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1736 if (mkv->cluster_pos == -1) {
1737 mkv->cluster_pos = avio_tell(s->pb);
1738 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1739 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1740 mkv->cluster_pts = FFMAX(0, ts);
1743 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1745 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1746 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1747 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1748 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1749 if (ret < 0) return ret;
1752 if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1753 duration = mkv_write_vtt_blocks(s, pb, pkt);
1755 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1756 mkv_blockgroup_size(pkt->size));
1757 /* For backward compatibility, prefer convergence_duration. */
1758 if (pkt->convergence_duration > 0) {
1759 duration = pkt->convergence_duration;
1761 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1762 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1763 end_ebml_master(pb, blockgroup);
1766 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1767 mkv->cluster_pos, relative_packet_pos, duration);
1772 mkv->duration = FFMAX(mkv->duration, ts + duration);
1776 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1778 MatroskaMuxContext *mkv = s->priv_data;
1779 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1780 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1782 int64_t cluster_time;
1784 int start_new_cluster;
1786 if (mkv->tracks[pkt->stream_index].write_dts)
1787 cluster_time = pkt->dts - mkv->cluster_pts;
1789 cluster_time = pkt->pts - mkv->cluster_pts;
1790 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1792 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1793 // after 4k and on a keyframe
1794 if (s->pb->seekable) {
1795 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1797 cluster_size = avio_tell(mkv->dyn_bc);
1800 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1801 // WebM DASH specification states that the first block of every cluster
1802 // has to be a key frame. So for DASH video, we only create a cluster
1803 // on seeing key frames.
1804 start_new_cluster = keyframe;
1805 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1806 (mkv->cluster_pos == -1 ||
1807 cluster_time > mkv->cluster_time_limit)) {
1808 // For DASH audio, we create a Cluster based on cluster_time_limit
1809 start_new_cluster = 1;
1810 } else if (!mkv->is_dash &&
1811 (cluster_size > mkv->cluster_size_limit ||
1812 cluster_time > mkv->cluster_time_limit ||
1813 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1814 cluster_size > 4 * 1024))) {
1815 start_new_cluster = 1;
1817 start_new_cluster = 0;
1820 if (mkv->cluster_pos != -1 && start_new_cluster) {
1821 mkv_start_new_cluster(s, pkt);
1824 // check if we have an audio packet cached
1825 if (mkv->cur_audio_pkt.size > 0) {
1826 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1827 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1828 mkv->is_dash ? start_new_cluster : 0);
1829 av_free_packet(&mkv->cur_audio_pkt);
1831 av_log(s, AV_LOG_ERROR,
1832 "Could not write cached audio packet ret:%d\n", ret);
1837 // buffer an audio packet to ensure the packet containing the video
1838 // keyframe's timecode is contained in the same cluster for WebM
1839 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1840 mkv->cur_audio_pkt = *pkt;
1842 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1843 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1845 ret = av_dup_packet(&mkv->cur_audio_pkt);
1846 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1847 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1850 ret = mkv_write_packet_internal(s, pkt, 0);
1854 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1856 MatroskaMuxContext *mkv = s->priv_data;
1858 if (s->pb->seekable)
1863 if (mkv->cluster_pos != -1) {
1864 av_log(s, AV_LOG_DEBUG,
1865 "Flushing cluster at offset %" PRIu64 " bytes\n",
1867 end_ebml_master(pb, mkv->cluster);
1868 mkv->cluster_pos = -1;
1870 mkv_flush_dynbuf(s);
1875 return mkv_write_packet(s, pkt);
1878 static int mkv_write_trailer(AVFormatContext *s)
1880 MatroskaMuxContext *mkv = s->priv_data;
1881 AVIOContext *pb = s->pb;
1882 int64_t currentpos, cuespos;
1885 // check if we have an audio packet cached
1886 if (mkv->cur_audio_pkt.size > 0) {
1887 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1888 av_free_packet(&mkv->cur_audio_pkt);
1890 av_log(s, AV_LOG_ERROR,
1891 "Could not write cached audio packet ret:%d\n", ret);
1897 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1898 mkv_flush_dynbuf(s);
1899 } else if (mkv->cluster_pos != -1) {
1900 end_ebml_master(pb, mkv->cluster);
1903 if (mkv->mode != MODE_WEBM) {
1904 ret = mkv_write_chapters(s);
1910 if (mkv->cues->num_entries) {
1911 if (mkv->reserve_cues_space) {
1914 currentpos = avio_tell(pb);
1915 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1917 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1918 cues_end = avio_tell(pb);
1919 if (cues_end > cuespos + mkv->reserve_cues_space) {
1920 av_log(s, AV_LOG_ERROR,
1921 "Insufficient space reserved for cues: %d "
1922 "(needed: %" PRId64 ").\n",
1923 mkv->reserve_cues_space, cues_end - cuespos);
1924 return AVERROR(EINVAL);
1927 if (cues_end < cuespos + mkv->reserve_cues_space)
1928 put_ebml_void(pb, mkv->reserve_cues_space -
1929 (cues_end - cuespos));
1931 avio_seek(pb, currentpos, SEEK_SET);
1933 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1936 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1942 mkv_write_seekhead(pb, mkv->main_seekhead);
1944 // update the duration
1945 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1946 currentpos = avio_tell(pb);
1947 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1948 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1950 avio_seek(pb, currentpos, SEEK_SET);
1953 end_ebml_master(pb, mkv->segment);
1954 av_freep(&mkv->tracks);
1955 av_freep(&mkv->cues->entries);
1956 av_freep(&mkv->cues);
1961 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1964 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1965 if (ff_mkv_codec_tags[i].id == codec_id)
1968 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1969 enum AVMediaType type = avcodec_get_type(codec_id);
1970 // mkv theoretically supports any video/audio through VFW/ACM
1971 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1978 static const AVCodecTag additional_audio_tags[] = {
1979 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1980 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1981 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1982 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1983 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1984 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1985 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1986 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1987 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1988 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1989 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1990 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1991 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1994 static const AVCodecTag additional_video_tags[] = {
1995 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1996 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1997 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1998 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1999 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2000 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2003 static const AVCodecTag additional_subtitle_tags[] = {
2004 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2005 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2006 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2009 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2010 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2011 static const AVOption options[] = {
2012 { "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 },
2013 { "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 },
2014 { "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 },
2015 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2016 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2017 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2021 #if CONFIG_MATROSKA_MUXER
2022 static const AVClass matroska_class = {
2023 .class_name = "matroska muxer",
2024 .item_name = av_default_item_name,
2026 .version = LIBAVUTIL_VERSION_INT,
2029 AVOutputFormat ff_matroska_muxer = {
2031 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2032 .mime_type = "video/x-matroska",
2033 .extensions = "mkv",
2034 .priv_data_size = sizeof(MatroskaMuxContext),
2035 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2036 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2037 .video_codec = CONFIG_LIBX264_ENCODER ?
2038 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2039 .write_header = mkv_write_header,
2040 .write_packet = mkv_write_flush_packet,
2041 .write_trailer = mkv_write_trailer,
2042 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2043 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2044 .codec_tag = (const AVCodecTag* const []){
2045 ff_codec_bmp_tags, ff_codec_wav_tags,
2046 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2048 .subtitle_codec = AV_CODEC_ID_ASS,
2049 .query_codec = mkv_query_codec,
2050 .priv_class = &matroska_class,
2054 #if CONFIG_WEBM_MUXER
2055 static const AVClass webm_class = {
2056 .class_name = "webm muxer",
2057 .item_name = av_default_item_name,
2059 .version = LIBAVUTIL_VERSION_INT,
2062 AVOutputFormat ff_webm_muxer = {
2064 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2065 .mime_type = "video/webm",
2066 .extensions = "webm",
2067 .priv_data_size = sizeof(MatroskaMuxContext),
2068 .audio_codec = AV_CODEC_ID_VORBIS,
2069 .video_codec = AV_CODEC_ID_VP8,
2070 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2071 .write_header = mkv_write_header,
2072 .write_packet = mkv_write_flush_packet,
2073 .write_trailer = mkv_write_trailer,
2074 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2075 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2076 .priv_class = &webm_class,
2080 #if CONFIG_MATROSKA_AUDIO_MUXER
2081 static const AVClass mka_class = {
2082 .class_name = "matroska audio muxer",
2083 .item_name = av_default_item_name,
2085 .version = LIBAVUTIL_VERSION_INT,
2087 AVOutputFormat ff_matroska_audio_muxer = {
2089 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2090 .mime_type = "audio/x-matroska",
2091 .extensions = "mka",
2092 .priv_data_size = sizeof(MatroskaMuxContext),
2093 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2094 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2095 .video_codec = AV_CODEC_ID_NONE,
2096 .write_header = mkv_write_header,
2097 .write_packet = mkv_write_flush_packet,
2098 .write_trailer = mkv_write_trailer,
2099 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2101 .codec_tag = (const AVCodecTag* const []){
2102 ff_codec_wav_tags, additional_audio_tags, 0
2104 .priv_class = &mka_class,