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 return ff_isom_write_hvcc(dyn_cp, codec->extradata,
609 codec->extradata_size, 0);
610 case AV_CODEC_ID_ALAC:
611 if (codec->extradata_size < 36) {
612 av_log(s, AV_LOG_ERROR,
613 "Invalid extradata found, ALAC expects a 36-byte "
615 return AVERROR_INVALIDDATA;
617 avio_write(dyn_cp, codec->extradata + 12,
618 codec->extradata_size - 12);
621 if (codec->codec_id == AV_CODEC_ID_PRORES &&
622 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
623 avio_wl32(dyn_cp, codec->codec_tag);
624 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
625 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
631 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
632 AVCodecContext *codec, int native_id,
637 int ret, codecpriv_size;
639 ret = avio_open_dyn_buf(&dyn_cp);
644 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
645 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
647 if (!codec->codec_tag)
648 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
650 if (codec->extradata_size) {
651 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
652 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
655 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
656 avio_wl32(dyn_cp, codec->codec_tag);
657 for(i = 0; i < 0x5a - 8; i++)
660 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
663 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
664 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
665 avcodec_get_name(codec->codec_id));
667 if (!codec->codec_tag)
668 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
670 if (!codec->codec_tag && codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
671 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
672 avcodec_get_name(codec->codec_id));
673 ret = AVERROR(EINVAL);
676 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
678 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
680 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
682 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
683 avcodec_get_name(codec->codec_id));
684 ret = AVERROR(EINVAL);
686 if (!codec->codec_tag)
687 codec->codec_tag = tag;
689 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
692 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
694 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
701 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
702 AVStream *st, int mode, int *h_width, int *h_height)
706 AVDictionaryEntry *tag;
707 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
711 // convert metadata into proper side data and add it to the stream
712 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
713 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
714 int stereo_mode = atoi(tag->value);
716 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
717 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
722 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
723 stereo_mode != 10 && stereo_mode != 12) {
724 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
730 // iterate to find the stereo3d side data
731 for (i = 0; i < st->nb_side_data; i++) {
732 AVPacketSideData sd = st->side_data[i];
733 if (sd.type == AV_PKT_DATA_STEREO3D) {
734 AVStereo3D *stereo = (AVStereo3D *)sd.data;
736 switch (stereo->type) {
738 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
740 case AV_STEREO3D_SIDEBYSIDE:
741 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
742 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
743 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
746 case AV_STEREO3D_TOPBOTTOM:
747 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
748 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
752 case AV_STEREO3D_CHECKERBOARD:
753 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
754 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
757 case AV_STEREO3D_LINES:
758 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
759 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
763 case AV_STEREO3D_COLUMNS:
764 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
765 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
769 case AV_STEREO3D_FRAMESEQUENCE:
770 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
771 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
779 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
782 // if webm, do not write unsupported modes
783 if ((mode == MODE_WEBM &&
784 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
785 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
786 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
787 av_log(s, AV_LOG_ERROR,
788 "The specified stereo mode is not valid.\n");
789 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
790 return AVERROR(EINVAL);
793 // write StereoMode if format is valid
794 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
799 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
800 int i, AVIOContext *pb, int default_stream_exists)
802 AVStream *st = s->streams[i];
803 AVCodecContext *codec = st->codec;
804 ebml_master subinfo, track;
807 int bit_depth = av_get_bits_per_sample(codec->codec_id);
808 int sample_rate = codec->sample_rate;
809 int output_sample_rate = 0;
810 int display_width_div = 1;
811 int display_height_div = 1;
813 AVDictionaryEntry *tag;
815 // ms precision is the de-facto standard timescale for mkv files
816 avpriv_set_pts_info(st, 64, 1, 1000);
818 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
819 mkv->have_attachments = 1;
823 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
824 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
826 bit_depth = codec->bits_per_coded_sample;
828 if (codec->codec_id == AV_CODEC_ID_AAC) {
829 ret = get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
834 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
835 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
836 mkv->is_dash ? mkv->dash_track_number : i + 1);
837 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
838 mkv->is_dash ? mkv->dash_track_number : i + 1);
839 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
841 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
842 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
843 tag = av_dict_get(st->metadata, "language", NULL, 0);
844 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
845 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
846 } else if (tag && tag->value) {
847 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
850 // The default value for TRACKFLAGDEFAULT is 1, so add element
851 // if we need to clear it.
852 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
853 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
855 if (st->disposition & AV_DISPOSITION_FORCED)
856 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
858 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
859 const char *codec_id;
860 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
861 codec_id = "D_WEBVTT/CAPTIONS";
862 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
863 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
864 codec_id = "D_WEBVTT/DESCRIPTIONS";
865 native_id = MATROSKA_TRACK_TYPE_METADATA;
866 } else if (st->disposition & AV_DISPOSITION_METADATA) {
867 codec_id = "D_WEBVTT/METADATA";
868 native_id = MATROSKA_TRACK_TYPE_METADATA;
870 codec_id = "D_WEBVTT/SUBTITLES";
871 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
873 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
875 // look for a codec ID string specific to mkv to use,
876 // if none are found, use AVI codes
877 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
878 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
879 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
884 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->codec_tag) {
885 if (mkv->allow_raw_vfw) {
888 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
889 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
890 return AVERROR(EINVAL);
895 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding && codec->codec_id == AV_CODEC_ID_OPUS) {
896 // mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
897 // (AVRational){ 1, codec->sample_rate },
900 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
901 av_rescale_q(codec->initial_padding,
902 (AVRational){ 1, codec->sample_rate },
903 (AVRational){ 1, 1000000000 }));
905 if (codec->codec_id == AV_CODEC_ID_OPUS) {
906 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
909 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
910 codec->codec_id == AV_CODEC_ID_VP9 ||
911 codec->codec_id == AV_CODEC_ID_OPUS ||
912 codec->codec_id == AV_CODEC_ID_VORBIS ||
913 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
914 av_log(s, AV_LOG_ERROR,
915 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
916 return AVERROR(EINVAL);
919 switch (codec->codec_type) {
920 case AVMEDIA_TYPE_VIDEO:
921 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
923 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
924 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
925 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
927 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
930 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
931 ((!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) && codec->codec_id != AV_CODEC_ID_RAWVIDEO) ||
932 codec->codec_id == AV_CODEC_ID_SVQ1 ||
933 codec->codec_id == AV_CODEC_ID_SVQ3 ||
934 codec->codec_id == AV_CODEC_ID_CINEPAK))
938 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
939 else if (!native_id) {
940 // if there is no mkv-specific codec ID, use VFW mode
941 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
942 mkv->tracks[i].write_dts = 1;
945 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
946 // XXX: interlace flag?
947 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
948 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
950 // check both side data and metadata for stereo information,
951 // write the result to the bitstream if any is found
952 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
954 &display_height_div);
958 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
959 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
960 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
961 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
964 // write DisplayWidth and DisplayHeight, they contain the size of
965 // a single source view and/or the display aspect ratio
966 if (st->sample_aspect_ratio.num) {
967 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
968 if (d_width > INT_MAX) {
969 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
970 return AVERROR(EINVAL);
972 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
973 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
974 } else if (display_width_div != 1 || display_height_div != 1) {
975 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
976 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
979 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
980 uint32_t color_space = av_le2ne32(codec->codec_tag);
981 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
984 end_ebml_master(pb, subinfo);
987 case AVMEDIA_TYPE_AUDIO:
988 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
991 // no mkv-specific ID, use ACM mode
992 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
994 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
995 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
996 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
997 if (output_sample_rate)
998 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1000 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1001 end_ebml_master(pb, subinfo);
1004 case AVMEDIA_TYPE_SUBTITLE:
1006 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
1007 return AVERROR(ENOSYS);
1010 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
1011 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1013 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1016 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1017 return AVERROR(EINVAL);
1020 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1021 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1026 end_ebml_master(pb, track);
1031 static int mkv_write_tracks(AVFormatContext *s)
1033 MatroskaMuxContext *mkv = s->priv_data;
1034 AVIOContext *pb = s->pb;
1036 int i, ret, default_stream_exists = 0;
1038 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1042 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1043 for (i = 0; i < s->nb_streams; i++) {
1044 AVStream *st = s->streams[i];
1045 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1047 for (i = 0; i < s->nb_streams; i++) {
1048 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1052 end_ebml_master(pb, tracks);
1056 static int mkv_write_chapters(AVFormatContext *s)
1058 MatroskaMuxContext *mkv = s->priv_data;
1059 AVIOContext *pb = s->pb;
1060 ebml_master chapters, editionentry;
1061 AVRational scale = {1, 1E9};
1064 if (!s->nb_chapters || mkv->wrote_chapters)
1067 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1068 if (ret < 0) return ret;
1070 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1071 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1072 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1073 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1074 for (i = 0; i < s->nb_chapters; i++) {
1075 ebml_master chapteratom, chapterdisplay;
1076 AVChapter *c = s->chapters[i];
1077 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1078 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1079 AVDictionaryEntry *t = NULL;
1080 if (chapterstart < 0 || chapterstart > chapterend)
1081 return AVERROR_INVALIDDATA;
1083 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1084 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1085 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1086 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1087 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1088 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1089 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1090 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1091 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1092 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1093 end_ebml_master(pb, chapterdisplay);
1095 end_ebml_master(pb, chapteratom);
1097 end_ebml_master(pb, editionentry);
1098 end_ebml_master(pb, chapters);
1100 mkv->wrote_chapters = 1;
1104 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1106 uint8_t *key = av_strdup(t->key);
1108 const uint8_t *lang = NULL;
1112 return AVERROR(ENOMEM);
1114 if ((p = strrchr(p, '-')) &&
1115 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1122 else if (*p >= 'a' && *p <= 'z')
1127 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1128 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1130 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1131 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1132 end_ebml_master(pb, tag);
1138 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1139 unsigned int uid, ebml_master *tags)
1141 MatroskaMuxContext *mkv = s->priv_data;
1142 ebml_master tag, targets;
1143 AVDictionaryEntry *t = NULL;
1147 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1148 if (ret < 0) return ret;
1150 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1153 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1154 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1156 put_ebml_uint(s->pb, elementid, uid);
1157 end_ebml_master(s->pb, targets);
1159 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1160 if (av_strcasecmp(t->key, "title") &&
1161 av_strcasecmp(t->key, "stereo_mode") &&
1162 av_strcasecmp(t->key, "encoding_tool")) {
1163 ret = mkv_write_simpletag(s->pb, t);
1169 end_ebml_master(s->pb, tag);
1173 static int mkv_check_tag(AVDictionary *m)
1175 AVDictionaryEntry *t = NULL;
1177 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1178 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1184 static int mkv_write_tags(AVFormatContext *s)
1186 MatroskaMuxContext *mkv = s->priv_data;
1187 ebml_master tags = {0};
1190 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1192 if (mkv_check_tag(s->metadata)) {
1193 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1194 if (ret < 0) return ret;
1197 for (i = 0; i < s->nb_streams; i++) {
1198 AVStream *st = s->streams[i];
1200 if (!mkv_check_tag(st->metadata))
1203 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1204 if (ret < 0) return ret;
1207 for (i = 0; i < s->nb_chapters; i++) {
1208 AVChapter *ch = s->chapters[i];
1210 if (!mkv_check_tag(ch->metadata))
1213 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1214 if (ret < 0) return ret;
1218 end_ebml_master(s->pb, tags);
1222 static int mkv_write_attachments(AVFormatContext *s)
1224 MatroskaMuxContext *mkv = s->priv_data;
1225 AVIOContext *pb = s->pb;
1226 ebml_master attachments;
1230 if (!mkv->have_attachments)
1233 av_lfg_init(&c, av_get_random_seed());
1235 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1236 if (ret < 0) return ret;
1238 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1240 for (i = 0; i < s->nb_streams; i++) {
1241 AVStream *st = s->streams[i];
1242 ebml_master attached_file;
1243 AVDictionaryEntry *t;
1244 const char *mimetype = NULL;
1247 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1250 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1252 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1253 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1254 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1255 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1256 return AVERROR(EINVAL);
1258 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1259 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1260 mimetype = t->value;
1261 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1263 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1264 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1265 mimetype = ff_mkv_mime_tags[i].str;
1270 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1271 "it cannot be deduced from the codec id.\n", i);
1272 return AVERROR(EINVAL);
1275 if (s->flags & AVFMT_FLAG_BITEXACT) {
1276 struct AVSHA *sha = av_sha_alloc();
1279 return AVERROR(ENOMEM);
1280 av_sha_init(sha, 160);
1281 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1282 av_sha_final(sha, digest);
1284 fileuid = AV_RL64(digest);
1286 fileuid = av_lfg_get(&c);
1288 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1291 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1292 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1293 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1294 end_ebml_master(pb, attached_file);
1296 end_ebml_master(pb, attachments);
1301 static int mkv_write_header(AVFormatContext *s)
1303 MatroskaMuxContext *mkv = s->priv_data;
1304 AVIOContext *pb = s->pb;
1305 ebml_master ebml_header, segment_info;
1306 AVDictionaryEntry *tag;
1307 int ret, i, version = 2;
1309 if (!strcmp(s->oformat->name, "webm"))
1310 mkv->mode = MODE_WEBM;
1312 mkv->mode = MODE_MATROSKAv2;
1314 if (s->avoid_negative_ts < 0)
1315 s->avoid_negative_ts = 1;
1317 if (mkv->mode != MODE_WEBM ||
1318 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1319 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1322 for (i = 0; i < s->nb_streams; i++) {
1323 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1324 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1325 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1326 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1327 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1328 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1329 av_log(s, AV_LOG_ERROR,
1330 "The Matroska muxer does not yet support muxing %s\n",
1331 avcodec_get_name(s->streams[i]->codec->codec_id));
1332 return AVERROR_PATCHWELCOME;
1334 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1335 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1336 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1340 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1342 return AVERROR(ENOMEM);
1344 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1345 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1346 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1347 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1348 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1349 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1350 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1351 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1352 end_ebml_master(pb, ebml_header);
1354 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1355 mkv->segment_offset = avio_tell(pb);
1357 // we write 2 seek heads - one at the end of the file to point to each
1358 // cluster, and one at the beginning to point to all other level one
1359 // elements (including the seek head at the end of the file), which
1360 // isn't more than 10 elements if we only write one of each other
1361 // currently defined level 1 element
1362 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1363 if (!mkv->main_seekhead)
1364 return AVERROR(ENOMEM);
1366 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1367 if (ret < 0) return ret;
1369 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1370 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1371 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1372 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1373 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1374 uint32_t segment_uid[4];
1377 av_lfg_init(&lfg, av_get_random_seed());
1379 for (i = 0; i < 4; i++)
1380 segment_uid[i] = av_lfg_get(&lfg);
1382 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1383 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1384 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1386 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1387 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1389 const char *ident = "Lavf";
1390 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1391 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1394 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1395 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1396 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1397 uint8_t date_utc_buf[8];
1398 AV_WB64(date_utc_buf, date_utc);
1399 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1402 // reserve space for the duration
1404 mkv->duration_offset = avio_tell(pb);
1405 put_ebml_void(pb, 11); // assumes double-precision float to be written
1406 end_ebml_master(pb, segment_info);
1408 ret = mkv_write_tracks(s);
1412 for (i = 0; i < s->nb_chapters; i++)
1413 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1415 if (mkv->mode != MODE_WEBM) {
1416 ret = mkv_write_chapters(s);
1420 ret = mkv_write_tags(s);
1424 ret = mkv_write_attachments(s);
1429 if (!s->pb->seekable)
1430 mkv_write_seekhead(pb, mkv->main_seekhead);
1432 mkv->cues = mkv_start_cues(mkv->segment_offset);
1434 return AVERROR(ENOMEM);
1436 if (pb->seekable && mkv->reserve_cues_space) {
1437 mkv->cues_pos = avio_tell(pb);
1438 put_ebml_void(pb, mkv->reserve_cues_space);
1441 av_init_packet(&mkv->cur_audio_pkt);
1442 mkv->cur_audio_pkt.size = 0;
1443 mkv->cluster_pos = -1;
1447 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1448 // after 4k and on a keyframe
1450 if (mkv->cluster_time_limit < 0)
1451 mkv->cluster_time_limit = 5000;
1452 if (mkv->cluster_size_limit < 0)
1453 mkv->cluster_size_limit = 5 * 1024 * 1024;
1455 if (mkv->cluster_time_limit < 0)
1456 mkv->cluster_time_limit = 1000;
1457 if (mkv->cluster_size_limit < 0)
1458 mkv->cluster_size_limit = 32 * 1024;
1464 static int mkv_blockgroup_size(int pkt_size)
1466 int size = pkt_size + 4;
1467 size += ebml_num_size(size);
1468 size += 2; // EBML ID for block and block duration
1469 size += 8; // max size of block duration
1470 size += ebml_num_size(size);
1471 size += 1; // blockgroup EBML ID
1475 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1482 dst = av_malloc(srclen);
1484 return AVERROR(ENOMEM);
1486 while (srclen >= WV_HEADER_SIZE) {
1489 ret = ff_wv_parse_header(&header, src);
1492 src += WV_HEADER_SIZE;
1493 srclen -= WV_HEADER_SIZE;
1495 if (srclen < header.blocksize) {
1496 ret = AVERROR_INVALIDDATA;
1500 if (header.initial) {
1501 AV_WL32(dst + offset, header.samples);
1504 AV_WL32(dst + offset, header.flags);
1505 AV_WL32(dst + offset + 4, header.crc);
1508 if (!(header.initial && header.final)) {
1509 AV_WL32(dst + offset, header.blocksize);
1513 memcpy(dst + offset, src, header.blocksize);
1514 src += header.blocksize;
1515 srclen -= header.blocksize;
1516 offset += header.blocksize;
1528 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1529 unsigned int blockid, AVPacket *pkt, int flags)
1531 MatroskaMuxContext *mkv = s->priv_data;
1532 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1533 uint8_t *data = NULL, *side_data = NULL;
1534 int offset = 0, size = pkt->size, side_data_size = 0;
1535 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1536 uint64_t additional_id = 0;
1537 int64_t discard_padding = 0;
1538 ebml_master block_group, block_additions, block_more;
1540 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1541 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1542 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1543 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1544 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1545 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1546 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1547 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1548 /* extradata is Annex B, assume the bitstream is too and convert it */
1549 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1550 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1551 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1553 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1559 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1560 /* Matroska specification requires to remove the first QuickTime atom
1566 side_data = av_packet_get_side_data(pkt,
1567 AV_PKT_DATA_SKIP_SAMPLES,
1570 if (side_data && side_data_size >= 10) {
1571 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1572 (AVRational){1, codec->sample_rate},
1573 (AVRational){1, 1000000000});
1576 side_data = av_packet_get_side_data(pkt,
1577 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1580 additional_id = AV_RB64(side_data);
1582 side_data_size -= 8;
1585 if ((side_data_size && additional_id == 1) || discard_padding) {
1586 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1587 blockid = MATROSKA_ID_BLOCK;
1590 put_ebml_id(pb, blockid);
1591 put_ebml_num(pb, size + 4, 0);
1592 // this assumes stream_index is less than 126
1593 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1594 avio_wb16(pb, ts - mkv->cluster_pts);
1596 avio_write(pb, data + offset, size);
1597 if (data != pkt->data)
1600 if (discard_padding) {
1601 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1604 if (side_data_size && additional_id == 1) {
1605 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1606 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1607 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1608 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1609 put_ebml_num(pb, side_data_size, 0);
1610 avio_write(pb, side_data, side_data_size);
1611 end_ebml_master(pb, block_more);
1612 end_ebml_master(pb, block_additions);
1614 if ((side_data_size && additional_id == 1) || discard_padding) {
1615 end_ebml_master(pb, block_group);
1619 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1621 MatroskaMuxContext *mkv = s->priv_data;
1622 ebml_master blockgroup;
1623 int id_size, settings_size, size;
1624 uint8_t *id, *settings;
1625 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1626 const int flags = 0;
1629 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1633 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1636 size = id_size + 1 + settings_size + 1 + pkt->size;
1638 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1639 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1640 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1642 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1644 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1645 put_ebml_num(pb, size + 4, 0);
1646 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1647 avio_wb16(pb, ts - mkv->cluster_pts);
1649 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1651 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1652 end_ebml_master(pb, blockgroup);
1654 return pkt->duration;
1657 static void mkv_flush_dynbuf(AVFormatContext *s)
1659 MatroskaMuxContext *mkv = s->priv_data;
1666 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1667 avio_write(s->pb, dyn_buf, bufsize);
1672 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1674 MatroskaMuxContext *mkv = s->priv_data;
1677 if (s->pb->seekable) {
1683 av_log(s, AV_LOG_DEBUG,
1684 "Starting new cluster at offset %" PRIu64 " bytes, "
1685 "pts %" PRIu64 "dts %" PRIu64 "\n",
1686 avio_tell(pb), pkt->pts, pkt->dts);
1687 end_ebml_master(pb, mkv->cluster);
1688 mkv->cluster_pos = -1;
1690 mkv_flush_dynbuf(s);
1694 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1696 MatroskaMuxContext *mkv = s->priv_data;
1697 AVIOContext *pb = s->pb;
1698 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1699 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1700 int duration = pkt->duration;
1702 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1703 int64_t relative_packet_pos;
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 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1724 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1731 if (mkv->cluster_pos == -1) {
1732 mkv->cluster_pos = avio_tell(s->pb);
1733 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1734 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1735 mkv->cluster_pts = FFMAX(0, ts);
1738 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1740 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1741 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1742 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1743 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1744 if (ret < 0) return ret;
1747 if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1748 duration = mkv_write_vtt_blocks(s, pb, pkt);
1750 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1751 mkv_blockgroup_size(pkt->size));
1752 /* For backward compatibility, prefer convergence_duration. */
1753 if (pkt->convergence_duration > 0) {
1754 duration = pkt->convergence_duration;
1756 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1757 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1758 end_ebml_master(pb, blockgroup);
1761 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1762 mkv->cluster_pos, relative_packet_pos, duration);
1767 mkv->duration = FFMAX(mkv->duration, ts + duration);
1771 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1773 MatroskaMuxContext *mkv = s->priv_data;
1774 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1775 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1777 int64_t cluster_time;
1779 int start_new_cluster;
1781 if (mkv->tracks[pkt->stream_index].write_dts)
1782 cluster_time = pkt->dts - mkv->cluster_pts;
1784 cluster_time = pkt->pts - mkv->cluster_pts;
1785 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1787 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1788 // after 4k and on a keyframe
1789 if (s->pb->seekable) {
1790 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1792 cluster_size = avio_tell(mkv->dyn_bc);
1795 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1796 // WebM DASH specification states that the first block of every cluster
1797 // has to be a key frame. So for DASH video, we only create a cluster
1798 // on seeing key frames.
1799 start_new_cluster = keyframe;
1800 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1801 (mkv->cluster_pos == -1 ||
1802 cluster_time > mkv->cluster_time_limit)) {
1803 // For DASH audio, we create a Cluster based on cluster_time_limit
1804 start_new_cluster = 1;
1805 } else if (!mkv->is_dash &&
1806 (cluster_size > mkv->cluster_size_limit ||
1807 cluster_time > mkv->cluster_time_limit ||
1808 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1809 cluster_size > 4 * 1024))) {
1810 start_new_cluster = 1;
1812 start_new_cluster = 0;
1815 if (mkv->cluster_pos != -1 && start_new_cluster) {
1816 mkv_start_new_cluster(s, pkt);
1819 // check if we have an audio packet cached
1820 if (mkv->cur_audio_pkt.size > 0) {
1821 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1822 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1823 mkv->is_dash ? start_new_cluster : 0);
1824 av_free_packet(&mkv->cur_audio_pkt);
1826 av_log(s, AV_LOG_ERROR,
1827 "Could not write cached audio packet ret:%d\n", ret);
1832 // buffer an audio packet to ensure the packet containing the video
1833 // keyframe's timecode is contained in the same cluster for WebM
1834 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1835 mkv->cur_audio_pkt = *pkt;
1837 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1838 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1840 ret = av_dup_packet(&mkv->cur_audio_pkt);
1841 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1842 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1845 ret = mkv_write_packet_internal(s, pkt, 0);
1849 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1851 MatroskaMuxContext *mkv = s->priv_data;
1853 if (s->pb->seekable)
1858 if (mkv->cluster_pos != -1) {
1859 av_log(s, AV_LOG_DEBUG,
1860 "Flushing cluster at offset %" PRIu64 " bytes\n",
1862 end_ebml_master(pb, mkv->cluster);
1863 mkv->cluster_pos = -1;
1865 mkv_flush_dynbuf(s);
1870 return mkv_write_packet(s, pkt);
1873 static int mkv_write_trailer(AVFormatContext *s)
1875 MatroskaMuxContext *mkv = s->priv_data;
1876 AVIOContext *pb = s->pb;
1877 int64_t currentpos, cuespos;
1880 // check if we have an audio packet cached
1881 if (mkv->cur_audio_pkt.size > 0) {
1882 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1883 av_free_packet(&mkv->cur_audio_pkt);
1885 av_log(s, AV_LOG_ERROR,
1886 "Could not write cached audio packet ret:%d\n", ret);
1892 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1893 mkv_flush_dynbuf(s);
1894 } else if (mkv->cluster_pos != -1) {
1895 end_ebml_master(pb, mkv->cluster);
1898 if (mkv->mode != MODE_WEBM) {
1899 ret = mkv_write_chapters(s);
1905 if (mkv->cues->num_entries) {
1906 if (mkv->reserve_cues_space) {
1909 currentpos = avio_tell(pb);
1910 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1912 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1913 cues_end = avio_tell(pb);
1914 if (cues_end > cuespos + mkv->reserve_cues_space) {
1915 av_log(s, AV_LOG_ERROR,
1916 "Insufficient space reserved for cues: %d "
1917 "(needed: %" PRId64 ").\n",
1918 mkv->reserve_cues_space, cues_end - cuespos);
1919 return AVERROR(EINVAL);
1922 if (cues_end < cuespos + mkv->reserve_cues_space)
1923 put_ebml_void(pb, mkv->reserve_cues_space -
1924 (cues_end - cuespos));
1926 avio_seek(pb, currentpos, SEEK_SET);
1928 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1931 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1937 mkv_write_seekhead(pb, mkv->main_seekhead);
1939 // update the duration
1940 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1941 currentpos = avio_tell(pb);
1942 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1943 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1945 avio_seek(pb, currentpos, SEEK_SET);
1948 end_ebml_master(pb, mkv->segment);
1949 av_freep(&mkv->tracks);
1950 av_freep(&mkv->cues->entries);
1951 av_freep(&mkv->cues);
1956 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1959 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1960 if (ff_mkv_codec_tags[i].id == codec_id)
1963 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1964 enum AVMediaType type = avcodec_get_type(codec_id);
1965 // mkv theoretically supports any video/audio through VFW/ACM
1966 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1973 static const AVCodecTag additional_audio_tags[] = {
1974 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1975 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1976 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1977 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1978 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1979 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1980 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1981 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1982 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1983 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1984 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1985 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1986 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1989 static const AVCodecTag additional_video_tags[] = {
1990 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1991 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1992 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1993 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1994 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1995 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1998 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
1999 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2000 static const AVOption options[] = {
2001 { "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 },
2002 { "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 },
2003 { "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 },
2004 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2005 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2006 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2010 #if CONFIG_MATROSKA_MUXER
2011 static const AVClass matroska_class = {
2012 .class_name = "matroska muxer",
2013 .item_name = av_default_item_name,
2015 .version = LIBAVUTIL_VERSION_INT,
2018 AVOutputFormat ff_matroska_muxer = {
2020 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2021 .mime_type = "video/x-matroska",
2022 .extensions = "mkv",
2023 .priv_data_size = sizeof(MatroskaMuxContext),
2024 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2025 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2026 .video_codec = CONFIG_LIBX264_ENCODER ?
2027 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2028 .write_header = mkv_write_header,
2029 .write_packet = mkv_write_flush_packet,
2030 .write_trailer = mkv_write_trailer,
2031 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2032 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2033 .codec_tag = (const AVCodecTag* const []){
2034 ff_codec_bmp_tags, ff_codec_wav_tags,
2035 additional_audio_tags, additional_video_tags, 0
2037 .subtitle_codec = AV_CODEC_ID_ASS,
2038 .query_codec = mkv_query_codec,
2039 .priv_class = &matroska_class,
2043 #if CONFIG_WEBM_MUXER
2044 static const AVClass webm_class = {
2045 .class_name = "webm muxer",
2046 .item_name = av_default_item_name,
2048 .version = LIBAVUTIL_VERSION_INT,
2051 AVOutputFormat ff_webm_muxer = {
2053 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2054 .mime_type = "video/webm",
2055 .extensions = "webm",
2056 .priv_data_size = sizeof(MatroskaMuxContext),
2057 .audio_codec = AV_CODEC_ID_VORBIS,
2058 .video_codec = AV_CODEC_ID_VP8,
2059 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2060 .write_header = mkv_write_header,
2061 .write_packet = mkv_write_flush_packet,
2062 .write_trailer = mkv_write_trailer,
2063 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2064 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2065 .priv_class = &webm_class,
2069 #if CONFIG_MATROSKA_AUDIO_MUXER
2070 static const AVClass mka_class = {
2071 .class_name = "matroska audio muxer",
2072 .item_name = av_default_item_name,
2074 .version = LIBAVUTIL_VERSION_INT,
2076 AVOutputFormat ff_matroska_audio_muxer = {
2078 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2079 .mime_type = "audio/x-matroska",
2080 .extensions = "mka",
2081 .priv_data_size = sizeof(MatroskaMuxContext),
2082 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2083 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2084 .video_codec = AV_CODEC_ID_NONE,
2085 .write_header = mkv_write_header,
2086 .write_packet = mkv_write_flush_packet,
2087 .write_trailer = mkv_write_trailer,
2088 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2090 .codec_tag = (const AVCodecTag* const []){
2091 ff_codec_wav_tags, additional_audio_tags, 0
2093 .priv_class = &mka_class,