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
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/stereo3d.h"
54 #include "libavcodec/xiph.h"
55 #include "libavcodec/mpeg4audio.h"
57 /* Level 1 elements we create a SeekHead entry for:
58 * Info, Tracks, Chapters, Attachments, Tags and Cues */
59 #define MAX_SEEKHEAD_ENTRIES 6
61 typedef struct ebml_master {
62 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
63 int sizebytes; ///< how many bytes were reserved for the size
66 typedef struct mkv_seekhead_entry {
71 typedef struct mkv_seekhead {
73 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
78 typedef struct mkv_cuepoint {
82 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
83 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
84 int64_t duration; ///< duration of the block according to time base
87 typedef struct mkv_cues {
88 mkv_cuepoint *entries;
92 typedef struct mkv_track {
98 int64_t sample_rate_offset;
99 int64_t last_timestamp;
101 int64_t duration_offset;
102 int64_t codecpriv_offset;
106 #define MODE_MATROSKAv2 0x01
107 #define MODE_WEBM 0x02
109 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
110 * range 1 to 126 (inclusive) */
111 #define MAX_TRACKS 126
113 typedef struct MatroskaMuxContext {
114 const AVClass *class;
116 AVIOContext *tags_bc;
118 AVIOContext *info_bc;
120 AVIOContext *tracks_bc;
123 int64_t segment_offset;
124 AVIOContext *cluster_bc;
125 int64_t cluster_pos; ///< file offset of the current cluster
127 int64_t duration_offset;
129 mkv_seekhead seekhead;
133 AVPacket cur_audio_pkt;
135 int have_attachments;
138 int reserve_cues_space;
139 int cluster_size_limit;
141 int64_t cluster_time_limit;
143 int dash_track_number;
147 uint32_t chapter_id_offset;
152 uint32_t segment_uid[4];
153 } MatroskaMuxContext;
155 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
156 * 8 byte for "matroska" doctype string */
157 #define MAX_EBML_HEADER_SIZE 35
159 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
160 * offset, 4 bytes for target EBML ID */
161 #define MAX_SEEKENTRY_SIZE 21
163 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
164 #define MAX_CUETRACKPOS_SIZE 40
166 /** Seek preroll value for opus */
167 #define OPUS_SEEK_PREROLL 80000000
169 static int ebml_id_size(uint32_t id)
171 return (av_log2(id) + 7U) / 8;
174 static void put_ebml_id(AVIOContext *pb, uint32_t id)
176 int i = ebml_id_size(id);
178 avio_w8(pb, (uint8_t)(id >> (i * 8)));
182 * Write an EBML size meaning "unknown size".
184 * @param bytes The number of bytes the size should occupy (maximum: 8).
186 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
188 av_assert0(bytes <= 8);
189 avio_w8(pb, 0x1ff >> bytes);
190 ffio_fill(pb, 0xff, bytes - 1);
194 * Calculate how many bytes are needed to represent a given number in EBML.
196 static int ebml_num_size(uint64_t num)
199 while ((num + 1) >> bytes * 7)
205 * Write a number in EBML variable length format.
207 * @param bytes The number of bytes that need to be used to write the number.
208 * If zero, the minimal number of bytes will be used.
210 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
212 int i, needed_bytes = ebml_num_size(num);
214 // sizes larger than this are currently undefined in EBML
215 av_assert0(num < (1ULL << 56) - 1);
218 bytes = needed_bytes;
219 // The bytes needed to write the given size must not exceed
220 // the bytes that we ought to use.
221 av_assert0(bytes >= needed_bytes);
223 num |= 1ULL << bytes * 7;
224 for (i = bytes - 1; i >= 0; i--)
225 avio_w8(pb, (uint8_t)(num >> i * 8));
229 * Write a (random) UID with fixed size to make the output more deterministic
231 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
233 put_ebml_id(pb, elementid);
234 put_ebml_num(pb, 8, 0);
238 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, bytes, 0);
247 for (i = bytes - 1; i >= 0; i--)
248 avio_w8(pb, (uint8_t)(val >> i * 8));
251 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
254 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
256 while (tmp>>=8) bytes++;
258 put_ebml_id(pb, elementid);
259 put_ebml_num(pb, bytes, 0);
260 for (i = bytes - 1; i >= 0; i--)
261 avio_w8(pb, (uint8_t)(val >> i * 8));
264 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
266 put_ebml_id(pb, elementid);
267 put_ebml_num(pb, 8, 0);
268 avio_wb64(pb, av_double2int(val));
271 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
272 const void *buf, int size)
274 put_ebml_id(pb, elementid);
275 put_ebml_num(pb, size, 0);
276 avio_write(pb, buf, size);
279 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
282 put_ebml_binary(pb, elementid, str, strlen(str));
286 * Write a void element of a given size. Useful for reserving space in
287 * the file to be written to later.
289 * @param size The number of bytes to reserve, which must be at least 2.
291 static void put_ebml_void(AVIOContext *pb, int size)
293 av_assert0(size >= 2);
295 put_ebml_id(pb, EBML_ID_VOID);
296 // we need to subtract the length needed to store the size from the
297 // size we need to reserve so 2 cases, we use 8 bytes to store the
298 // size if possible, 1 byte otherwise
301 put_ebml_num(pb, size, 0);
304 put_ebml_num(pb, size, 8);
306 ffio_fill(pb, 0, size);
309 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
310 uint64_t expectedsize)
312 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
314 put_ebml_id(pb, elementid);
315 put_ebml_size_unknown(pb, bytes);
316 return (ebml_master) { avio_tell(pb), bytes };
319 static void end_ebml_master(AVIOContext *pb, ebml_master master)
321 int64_t pos = avio_tell(pb);
323 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
325 put_ebml_num(pb, pos - master.pos, master.sizebytes);
326 avio_seek(pb, pos, SEEK_SET);
329 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
333 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
337 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
342 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
343 MatroskaMuxContext *mkv, uint32_t id,
344 int length_size, int keep_buffer)
346 uint8_t *buf, crc[4];
350 size = avio_get_dyn_buf(*dyn_cp, &buf);
351 put_ebml_num(pb, size, length_size);
352 if (mkv->write_crc) {
353 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
354 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
355 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
357 avio_write(pb, buf + skip, size - skip);
360 ffio_reset_dyn_buf(*dyn_cp);
362 ffio_free_dyn_buf(dyn_cp);
367 * Complete ebml master without destroying the buffer, allowing for later updates
369 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
370 uint32_t id, int64_t *pos)
373 int size = avio_get_dyn_buf(dyn_cp, &buf);
375 *pos = avio_tell(pb);
378 put_ebml_num(pb, size, 0);
379 avio_write(pb, buf, size);
382 static void put_xiph_size(AVIOContext *pb, int size)
384 ffio_fill(pb, 255, size / 255);
385 avio_w8(pb, size % 255);
389 * Free the members allocated in the mux context.
391 static void mkv_deinit(AVFormatContext *s)
393 MatroskaMuxContext *mkv = s->priv_data;
395 av_packet_unref(&mkv->cur_audio_pkt);
397 ffio_free_dyn_buf(&mkv->cluster_bc);
398 ffio_free_dyn_buf(&mkv->info_bc);
399 ffio_free_dyn_buf(&mkv->tracks_bc);
400 ffio_free_dyn_buf(&mkv->tags_bc);
402 av_freep(&mkv->cues.entries);
403 av_freep(&mkv->tracks);
407 * Initialize the SeekHead element to be ready to index level 1 Matroska
408 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
409 * will be reserved at the current file location.
411 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
413 mkv->seekhead.filepos = avio_tell(pb);
414 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
415 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
416 // that an EBML void element will fit afterwards
417 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
418 put_ebml_void(pb, mkv->seekhead.reserved_size);
421 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
424 mkv_seekhead *seekhead = &mkv->seekhead;
426 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
428 seekhead->entries[seekhead->num_entries].elementid = elementid;
429 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
433 * Write the SeekHead to the file at the location reserved for it
434 * and seek to destpos afterwards. When error_on_seek_failure
435 * is not set, failure to seek to the position designated for the
436 * SeekHead is not considered an error and it is presumed that
437 * destpos is the current position; failure to seek to destpos
438 * afterwards is always an error.
440 * @return 0 on success, < 0 on error.
442 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
443 int error_on_seek_failure, int64_t destpos)
445 AVIOContext *dyn_cp = NULL;
446 mkv_seekhead *seekhead = &mkv->seekhead;
447 int64_t remaining, ret64;
450 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
451 return error_on_seek_failure ? ret64 : 0;
453 ret = start_ebml_master_crc32(&dyn_cp, mkv);
457 for (i = 0; i < seekhead->num_entries; i++) {
458 mkv_seekhead_entry *entry = &seekhead->entries[i];
459 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
462 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
463 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
464 put_ebml_id(dyn_cp, entry->elementid);
466 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
467 end_ebml_master(dyn_cp, seekentry);
469 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
471 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
472 put_ebml_void(pb, remaining);
474 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
480 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
481 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
483 mkv_cues *cues = &mkv->cues;
484 mkv_cuepoint *entries = cues->entries;
489 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
491 return AVERROR(ENOMEM);
492 cues->entries = entries;
494 cues->entries[cues->num_entries].pts = ts;
495 cues->entries[cues->num_entries].stream_idx = stream;
496 cues->entries[cues->num_entries].tracknum = tracknum;
497 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
498 cues->entries[cues->num_entries].relative_pos = relative_pos;
499 cues->entries[cues->num_entries++].duration = duration;
504 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
505 mkv_cues *cues, mkv_track *tracks, int num_tracks)
507 AVIOContext *cuepoint;
510 ret = avio_open_dyn_buf(&cuepoint);
514 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
516 uint64_t pts = entry->pts;
520 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
522 // put all the entries from different tracks that have the exact same
523 // timestamp into the same CuePoint
524 for (int j = 0; j < num_tracks; j++)
525 tracks[j].has_cue = 0;
527 ebml_master track_positions;
528 int idx = entry->stream_idx;
530 av_assert0(idx >= 0 && idx < num_tracks);
531 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
533 tracks[idx].has_cue = 1;
534 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
535 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
536 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
537 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
538 if (entry->duration != -1)
539 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
540 end_ebml_master(cuepoint, track_positions);
541 } while (++entry < end && entry->pts == pts);
542 size = avio_get_dyn_buf(cuepoint, &buf);
543 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
544 ffio_reset_dyn_buf(cuepoint);
546 ffio_free_dyn_buf(&cuepoint);
551 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
553 const uint8_t *header_start[3];
555 int first_header_size;
558 if (par->codec_id == AV_CODEC_ID_VORBIS)
559 first_header_size = 30;
561 first_header_size = 42;
563 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
564 first_header_size, header_start, header_len) < 0) {
565 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
569 avio_w8(pb, 2); // number packets - 1
570 for (j = 0; j < 2; j++) {
571 put_xiph_size(pb, header_len[j]);
573 for (j = 0; j < 3; j++)
574 avio_write(pb, header_start[j], header_len[j]);
579 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
581 if (par->extradata && par->extradata_size == 2)
582 avio_write(pb, par->extradata, 2);
584 avio_wl16(pb, 0x410); // fallback to the most recent version
588 static int put_flac_codecpriv(AVFormatContext *s,
589 AVIOContext *pb, AVCodecParameters *par)
591 int write_comment = (par->channel_layout &&
592 !(par->channel_layout & ~0x3ffffULL) &&
593 !ff_flac_is_native_layout(par->channel_layout));
594 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
601 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
602 "Lavf" : LIBAVFORMAT_IDENT;
603 AVDictionary *dict = NULL;
604 uint8_t buf[32], *data, *p;
607 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
608 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
610 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
611 if (len >= ((1<<24) - 4)) {
613 return AVERROR(EINVAL);
616 data = av_malloc(len + 4);
619 return AVERROR(ENOMEM);
623 AV_WB24(data + 1, len);
626 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
628 avio_write(pb, data, len + 4);
637 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
638 int *sample_rate, int *output_sample_rate)
640 MPEG4AudioConfig mp4ac;
643 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
644 /* Don't abort if the failure is because of missing extradata. Assume in that
645 * case a bitstream filter will provide the muxer with the extradata in the
647 * Abort however if s->pb is not seekable, as we would not be able to seek back
648 * to write the sample rate elements once the extradata shows up, anyway. */
649 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
650 av_log(s, AV_LOG_ERROR,
651 "Error parsing AAC extradata, unable to determine samplerate.\n");
652 return AVERROR(EINVAL);
656 /* This will only happen when this function is called while writing the
657 * header and no extradata is available. The space for this element has
658 * to be reserved for when this function is called again after the
659 * extradata shows up in the first packet, as there's no way to know if
660 * output_sample_rate will be different than sample_rate or not. */
661 *output_sample_rate = *sample_rate;
663 *sample_rate = mp4ac.sample_rate;
664 *output_sample_rate = mp4ac.ext_sample_rate;
669 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
670 AVCodecParameters *par,
673 switch (par->codec_id) {
674 case AV_CODEC_ID_VORBIS:
675 case AV_CODEC_ID_THEORA:
676 return put_xiph_codecpriv(s, dyn_cp, par);
677 case AV_CODEC_ID_FLAC:
678 return put_flac_codecpriv(s, dyn_cp, par);
679 case AV_CODEC_ID_WAVPACK:
680 return put_wv_codecpriv(dyn_cp, par);
681 case AV_CODEC_ID_H264:
682 return ff_isom_write_avcc(dyn_cp, par->extradata,
683 par->extradata_size);
684 case AV_CODEC_ID_HEVC:
685 return ff_isom_write_hvcc(dyn_cp, par->extradata,
686 par->extradata_size, 0);
687 case AV_CODEC_ID_AV1:
688 if (par->extradata_size)
689 return ff_isom_write_av1c(dyn_cp, par->extradata,
690 par->extradata_size);
692 put_ebml_void(pb, 4 + 3);
694 case AV_CODEC_ID_ALAC:
695 if (par->extradata_size < 36) {
696 av_log(s, AV_LOG_ERROR,
697 "Invalid extradata found, ALAC expects a 36-byte "
699 return AVERROR_INVALIDDATA;
701 avio_write(dyn_cp, par->extradata + 12,
702 par->extradata_size - 12);
704 case AV_CODEC_ID_AAC:
705 if (par->extradata_size)
706 avio_write(dyn_cp, par->extradata, par->extradata_size);
708 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
711 if (par->codec_id == AV_CODEC_ID_PRORES &&
712 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
713 avio_wl32(dyn_cp, par->codec_tag);
714 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
715 avio_write(dyn_cp, par->extradata, par->extradata_size);
721 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
722 AVCodecParameters *par,
723 int native_id, int qt_id)
727 int ret, codecpriv_size;
729 ret = avio_open_dyn_buf(&dyn_cp);
734 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
735 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
738 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
740 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
741 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
744 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
745 avio_wl32(dyn_cp, par->codec_tag);
746 for(i = 0; i < 0x5a - 8; i++)
749 avio_write(dyn_cp, par->extradata, par->extradata_size);
751 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
752 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
753 avcodec_get_name(par->codec_id));
756 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
758 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
759 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
760 avcodec_get_name(par->codec_id));
761 ret = AVERROR(EINVAL);
764 ff_put_bmp_header(dyn_cp, par, 0, 0);
766 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
768 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
770 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
771 avcodec_get_name(par->codec_id));
772 ret = AVERROR(EINVAL);
775 par->codec_tag = tag;
777 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
780 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
782 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
784 ffio_free_dyn_buf(&dyn_cp);
788 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
790 uint8_t *colorinfo_ptr;
791 int side_data_size = 0;
792 int ret, colorinfo_size;
793 const uint8_t *side_data;
795 ret = avio_open_dyn_buf(&dyn_cp);
799 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
800 par->color_trc < AVCOL_TRC_NB) {
801 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
804 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
805 par->color_space < AVCOL_SPC_NB) {
806 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
808 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
809 par->color_primaries < AVCOL_PRI_NB) {
810 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
812 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
813 par->color_range < AVCOL_RANGE_NB) {
814 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
816 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
817 par->chroma_location <= AVCHROMA_LOC_TOP) {
820 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
821 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
825 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
827 if (side_data_size) {
828 const AVContentLightMetadata *metadata =
829 (const AVContentLightMetadata*)side_data;
830 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
834 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
836 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
837 ebml_master meta_element = start_ebml_master(
838 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
839 const AVMasteringDisplayMetadata *metadata =
840 (const AVMasteringDisplayMetadata*)side_data;
841 if (metadata->has_primaries) {
842 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
843 av_q2d(metadata->display_primaries[0][0]));
844 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
845 av_q2d(metadata->display_primaries[0][1]));
846 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
847 av_q2d(metadata->display_primaries[1][0]));
848 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
849 av_q2d(metadata->display_primaries[1][1]));
850 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
851 av_q2d(metadata->display_primaries[2][0]));
852 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
853 av_q2d(metadata->display_primaries[2][1]));
854 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
855 av_q2d(metadata->white_point[0]));
856 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
857 av_q2d(metadata->white_point[1]));
859 if (metadata->has_luminance) {
860 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
861 av_q2d(metadata->max_luminance));
862 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
863 av_q2d(metadata->min_luminance));
865 end_ebml_master(dyn_cp, meta_element);
868 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
869 if (colorinfo_size) {
870 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
871 avio_write(pb, colorinfo_ptr, colorinfo_size);
872 end_ebml_master(pb, colorinfo);
874 ffio_free_dyn_buf(&dyn_cp);
878 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
881 ebml_master projection;
882 int side_data_size = 0;
885 const AVSphericalMapping *spherical =
886 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
892 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
893 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
894 spherical->projection != AV_SPHERICAL_CUBEMAP) {
895 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
899 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
900 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
901 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
902 4 * (2 + 1 + 8) + (2 + 1 + 20));
904 switch (spherical->projection) {
905 case AV_SPHERICAL_EQUIRECTANGULAR:
906 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
907 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
909 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
910 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
911 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
912 AV_WB32(private, 0); // version + flags
913 AV_WB32(private + 4, spherical->bound_top);
914 AV_WB32(private + 8, spherical->bound_bottom);
915 AV_WB32(private + 12, spherical->bound_left);
916 AV_WB32(private + 16, spherical->bound_right);
917 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
920 case AV_SPHERICAL_CUBEMAP:
921 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
922 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
923 AV_WB32(private, 0); // version + flags
924 AV_WB32(private + 4, 0); // layout
925 AV_WB32(private + 8, spherical->padding);
926 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
934 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
935 (double) spherical->yaw / (1 << 16));
936 if (spherical->pitch)
937 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
938 (double) spherical->pitch / (1 << 16));
940 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
941 (double) spherical->roll / (1 << 16));
943 end_ebml_master(pb, projection);
948 static void mkv_write_field_order(AVIOContext *pb, int mode,
949 enum AVFieldOrder field_order)
951 switch (field_order) {
952 case AV_FIELD_UNKNOWN:
954 case AV_FIELD_PROGRESSIVE:
955 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
956 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
962 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
963 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
964 if (mode != MODE_WEBM) {
965 switch (field_order) {
967 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
968 MATROSKA_VIDEO_FIELDORDER_TT);
971 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
972 MATROSKA_VIDEO_FIELDORDER_BB);
975 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
976 MATROSKA_VIDEO_FIELDORDER_TB);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
980 MATROSKA_VIDEO_FIELDORDER_BT);
987 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
988 AVStream *st, int mode, int *h_width, int *h_height)
992 AVDictionaryEntry *tag;
993 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
997 // convert metadata into proper side data and add it to the stream
998 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
999 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1000 int stereo_mode = atoi(tag->value);
1002 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1003 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1008 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1009 stereo_mode != 10 && stereo_mode != 12) {
1010 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1016 // iterate to find the stereo3d side data
1017 for (i = 0; i < st->nb_side_data; i++) {
1018 AVPacketSideData sd = st->side_data[i];
1019 if (sd.type == AV_PKT_DATA_STEREO3D) {
1020 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1022 switch (stereo->type) {
1023 case AV_STEREO3D_2D:
1024 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1026 case AV_STEREO3D_SIDEBYSIDE:
1027 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1028 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1029 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1032 case AV_STEREO3D_TOPBOTTOM:
1033 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1034 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1038 case AV_STEREO3D_CHECKERBOARD:
1039 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1040 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1043 case AV_STEREO3D_LINES:
1044 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1045 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1049 case AV_STEREO3D_COLUMNS:
1050 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1051 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1055 case AV_STEREO3D_FRAMESEQUENCE:
1056 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1057 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1065 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1068 // if webm, do not write unsupported modes
1069 if ((mode == MODE_WEBM &&
1070 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1071 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1072 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1073 av_log(s, AV_LOG_ERROR,
1074 "The specified stereo mode is not valid.\n");
1075 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1076 return AVERROR(EINVAL);
1079 // write StereoMode if format is valid
1080 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1085 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1086 int i, AVIOContext *pb, int default_stream_exists)
1088 AVStream *st = s->streams[i];
1089 AVCodecParameters *par = st->codecpar;
1090 ebml_master subinfo, track;
1094 int sample_rate = par->sample_rate;
1095 int output_sample_rate = 0;
1096 int display_width_div = 1;
1097 int display_height_div = 1;
1099 AVDictionaryEntry *tag;
1101 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1102 mkv->have_attachments = 1;
1106 if (par->codec_id == AV_CODEC_ID_AAC) {
1107 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1108 &output_sample_rate);
1113 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1114 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER, mkv->tracks[i].track_num);
1115 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, mkv->tracks[i].uid);
1116 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1118 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1119 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1120 tag = av_dict_get(st->metadata, "language", NULL, 0);
1121 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1122 tag && tag->value ? tag->value : "und");
1124 // The default value for TRACKFLAGDEFAULT is 1, so add element
1125 // if we need to clear it.
1126 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1127 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1129 if (st->disposition & AV_DISPOSITION_FORCED)
1130 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1132 if (mkv->mode == MODE_WEBM) {
1133 const char *codec_id;
1134 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1135 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1136 if (ff_webm_codec_tags[j].id == par->codec_id) {
1137 codec_id = ff_webm_codec_tags[j].str;
1142 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1143 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1144 codec_id = "D_WEBVTT/CAPTIONS";
1145 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1146 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1147 codec_id = "D_WEBVTT/DESCRIPTIONS";
1148 native_id = MATROSKA_TRACK_TYPE_METADATA;
1149 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1150 codec_id = "D_WEBVTT/METADATA";
1151 native_id = MATROSKA_TRACK_TYPE_METADATA;
1153 codec_id = "D_WEBVTT/SUBTITLES";
1154 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1159 av_log(s, AV_LOG_ERROR,
1160 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1161 return AVERROR(EINVAL);
1164 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1166 // look for a codec ID string specific to mkv to use,
1167 // if none are found, use AVI codes
1168 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1169 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1170 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1171 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1177 if (mkv->allow_raw_vfw) {
1180 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1181 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1182 return AVERROR(EINVAL);
1187 switch (par->codec_type) {
1188 case AVMEDIA_TYPE_VIDEO:
1189 mkv->have_video = 1;
1190 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1192 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1193 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1194 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1195 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1196 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1197 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1200 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1201 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1202 par->codec_id == AV_CODEC_ID_SVQ1 ||
1203 par->codec_id == AV_CODEC_ID_SVQ3 ||
1204 par->codec_id == AV_CODEC_ID_CINEPAK))
1208 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1209 else if (!native_id) {
1210 // if there is no mkv-specific codec ID, use VFW mode
1211 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1212 mkv->tracks[i].write_dts = 1;
1213 s->internal->avoid_negative_ts_use_pts = 0;
1216 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1218 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1219 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1221 mkv_write_field_order(pb, mkv->mode, par->field_order);
1223 // check both side data and metadata for stereo information,
1224 // write the result to the bitstream if any is found
1225 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1227 &display_height_div);
1231 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1232 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1233 (par->format == AV_PIX_FMT_YUVA420P)) {
1234 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1237 // write DisplayWidth and DisplayHeight, they contain the size of
1238 // a single source view and/or the display aspect ratio
1239 if (st->sample_aspect_ratio.num) {
1240 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1241 if (d_width > INT_MAX) {
1242 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1243 return AVERROR(EINVAL);
1245 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1246 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1247 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1248 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1250 AVRational display_aspect_ratio;
1251 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1252 par->width * (int64_t)st->sample_aspect_ratio.num,
1253 par->height * (int64_t)st->sample_aspect_ratio.den,
1255 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1256 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1257 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1260 } else if (display_width_div != 1 || display_height_div != 1) {
1261 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1262 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1263 } else if (mkv->mode != MODE_WEBM)
1264 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1266 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1267 uint32_t color_space = av_le2ne32(par->codec_tag);
1268 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1270 ret = mkv_write_video_color(pb, par, st);
1273 ret = mkv_write_video_projection(s, pb, st);
1276 end_ebml_master(pb, subinfo);
1279 case AVMEDIA_TYPE_AUDIO:
1280 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1281 int64_t codecdelay = av_rescale_q(par->initial_padding,
1282 (AVRational){ 1, 48000 },
1283 (AVRational){ 1, 1000000000 });
1284 if (codecdelay < 0) {
1285 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1286 return AVERROR(EINVAL);
1288 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1289 // (AVRational){ 1, par->sample_rate },
1292 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1294 if (par->codec_id == AV_CODEC_ID_OPUS)
1295 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1297 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1300 // no mkv-specific ID, use ACM mode
1301 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1303 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1304 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1306 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1307 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1308 if (output_sample_rate)
1309 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1311 bit_depth = av_get_bits_per_sample(par->codec_id);
1312 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1313 if (par->bits_per_raw_sample)
1314 bit_depth = par->bits_per_raw_sample;
1316 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1319 bit_depth = par->bits_per_coded_sample;
1321 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1322 end_ebml_master(pb, subinfo);
1325 case AVMEDIA_TYPE_SUBTITLE:
1327 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1328 return AVERROR(ENOSYS);
1331 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1332 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1334 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1337 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1338 return AVERROR(EINVAL);
1341 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1342 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1343 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1348 end_ebml_master(pb, track);
1353 static int mkv_write_tracks(AVFormatContext *s)
1355 MatroskaMuxContext *mkv = s->priv_data;
1356 AVIOContext *pb = s->pb;
1357 int i, ret, default_stream_exists = 0;
1359 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1361 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1365 for (i = 0; i < s->nb_streams; i++) {
1366 AVStream *st = s->streams[i];
1367 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1369 for (i = 0; i < s->nb_streams; i++) {
1370 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1375 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1376 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1377 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1379 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1384 static int mkv_write_chapters(AVFormatContext *s)
1386 MatroskaMuxContext *mkv = s->priv_data;
1387 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1388 ebml_master editionentry;
1389 AVRational scale = {1, 1E9};
1392 if (!s->nb_chapters || mkv->wrote_chapters)
1395 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1397 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1398 if (ret < 0) return ret;
1400 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1401 if (mkv->mode != MODE_WEBM) {
1402 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1403 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1405 for (i = 0; i < s->nb_chapters; i++) {
1406 ebml_master chapteratom, chapterdisplay;
1407 AVChapter *c = s->chapters[i];
1408 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1409 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1410 AVDictionaryEntry *t = NULL;
1411 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1412 av_log(s, AV_LOG_ERROR,
1413 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1414 chapterstart, chapterend);
1415 return AVERROR_INVALIDDATA;
1418 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1419 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1420 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1421 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1422 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1423 if (mkv->mode != MODE_WEBM) {
1424 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1425 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1427 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1428 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1429 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1430 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1431 end_ebml_master(dyn_cp, chapterdisplay);
1433 end_ebml_master(dyn_cp, chapteratom);
1435 end_ebml_master(dyn_cp, editionentry);
1436 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1438 mkv->wrote_chapters = 1;
1442 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1444 uint8_t *key = av_strdup(t->key);
1446 const uint8_t *lang = NULL;
1450 return AVERROR(ENOMEM);
1452 if ((p = strrchr(p, '-')) &&
1453 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1460 else if (*p >= 'a' && *p <= 'z')
1465 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1466 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1468 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1469 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1470 end_ebml_master(pb, tag);
1476 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1477 uint64_t uid, ebml_master *tag)
1480 MatroskaMuxContext *mkv = s->priv_data;
1481 ebml_master targets;
1484 if (!mkv->tags_bc) {
1485 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1487 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1493 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1494 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1496 put_ebml_uid(pb, elementid, uid);
1497 end_ebml_master(pb, targets);
1501 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1503 return av_strcasecmp(name, "title") &&
1504 av_strcasecmp(name, "stereo_mode") &&
1505 av_strcasecmp(name, "creation_time") &&
1506 av_strcasecmp(name, "encoding_tool") &&
1507 av_strcasecmp(name, "duration") &&
1508 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1509 av_strcasecmp(name, "language")) &&
1510 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1511 (av_strcasecmp(name, "filename") &&
1512 av_strcasecmp(name, "mimetype")));
1515 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1516 uint64_t uid, ebml_master *tag)
1518 MatroskaMuxContext *mkv = s->priv_data;
1521 AVDictionaryEntry *t = NULL;
1523 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1527 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1528 if (mkv_check_tag_name(t->key, elementid)) {
1529 ret = mkv_write_simpletag(mkv->tags_bc, t);
1536 end_ebml_master(mkv->tags_bc, tag2);
1541 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1543 AVDictionaryEntry *t = NULL;
1545 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1546 if (mkv_check_tag_name(t->key, elementid))
1552 static int mkv_write_tags(AVFormatContext *s)
1554 MatroskaMuxContext *mkv = s->priv_data;
1555 ebml_master tag, *tagp;
1558 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1560 if (mkv_check_tag(s->metadata, 0)) {
1561 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1562 if (ret < 0) return ret;
1565 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1566 for (i = 0; i < s->nb_streams; i++) {
1567 AVStream *st = s->streams[i];
1568 mkv_track *track = &mkv->tracks[i];
1570 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1573 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1576 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1578 if (ret < 0) return ret;
1581 AVIOContext *pb = mkv->tags_bc;
1582 ebml_master simpletag;
1584 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1585 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1586 mkv->tracks[i].duration_offset = avio_tell(pb);
1588 // Reserve space to write duration as a 20-byte string.
1589 // 2 (ebml id) + 1 (data size) + 20 (data)
1590 put_ebml_void(pb, 23);
1591 end_ebml_master(pb, simpletag);
1592 end_ebml_master(pb, tag);
1596 if (mkv->mode != MODE_WEBM) {
1597 for (i = 0; i < s->nb_chapters; i++) {
1598 AVChapter *ch = s->chapters[i];
1600 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1603 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1604 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1611 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1612 for (i = 0; i < s->nb_streams; i++) {
1613 mkv_track *track = &mkv->tracks[i];
1614 AVStream *st = s->streams[i];
1616 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1619 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1622 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1630 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1631 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1632 MATROSKA_ID_TAGS, &mkv->tags_pos);
1634 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1639 static int mkv_write_attachments(AVFormatContext *s)
1641 MatroskaMuxContext *mkv = s->priv_data;
1642 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1645 if (!mkv->have_attachments)
1648 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1650 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1651 if (ret < 0) return ret;
1653 for (i = 0; i < s->nb_streams; i++) {
1654 AVStream *st = s->streams[i];
1655 mkv_track *track = &mkv->tracks[i];
1656 ebml_master attached_file;
1657 AVDictionaryEntry *t;
1658 const char *mimetype = NULL;
1660 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1663 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1665 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1666 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1667 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1668 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1669 return AVERROR(EINVAL);
1671 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1672 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1673 mimetype = t->value;
1674 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1676 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1677 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1678 mimetype = ff_mkv_mime_tags[i].str;
1681 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1682 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1683 mimetype = ff_mkv_image_mime_tags[i].str;
1688 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1689 "it cannot be deduced from the codec id.\n", i);
1690 return AVERROR(EINVAL);
1693 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1694 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1695 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1696 end_ebml_master(dyn_cp, attached_file);
1698 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1703 static int64_t get_metadata_duration(AVFormatContext *s)
1709 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1710 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1711 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1715 for (i = 0; i < s->nb_streams; i++) {
1717 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1719 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1720 max = FFMAX(max, us);
1723 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1727 static int mkv_write_header(AVFormatContext *s)
1729 MatroskaMuxContext *mkv = s->priv_data;
1730 AVIOContext *pb = s->pb;
1731 ebml_master ebml_header;
1732 AVDictionaryEntry *tag;
1733 int ret, i, version = 2;
1734 int64_t creation_time;
1736 if (!strcmp(s->oformat->name, "webm")) {
1737 mkv->mode = MODE_WEBM;
1740 mkv->mode = MODE_MATROSKAv2;
1742 if (mkv->mode != MODE_WEBM ||
1743 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1744 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1747 for (i = 0; i < s->nb_streams; i++) {
1748 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1749 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1750 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1754 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1755 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1756 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1757 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1758 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1759 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1760 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1761 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1762 end_ebml_master(pb, ebml_header);
1764 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1765 mkv->segment_offset = avio_tell(pb);
1767 // we write a seek head at the beginning to point to all other level
1768 // one elements (except Clusters).
1769 mkv_start_seekhead(mkv, pb);
1771 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1773 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1778 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1779 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1780 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1781 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1782 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1783 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1784 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1786 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1788 if (mkv->mode != MODE_WEBM) {
1789 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1792 const char *ident = "Lavf";
1793 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1794 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1797 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1798 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1799 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1800 uint8_t date_utc_buf[8];
1801 AV_WB64(date_utc_buf, date_utc);
1802 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1805 // reserve space for the duration
1807 mkv->duration_offset = avio_tell(pb);
1808 if (!mkv->is_live) {
1809 int64_t metadata_duration = get_metadata_duration(s);
1811 if (s->duration > 0) {
1812 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1813 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1814 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1815 } else if (metadata_duration > 0) {
1816 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1817 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1818 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1820 put_ebml_void(pb, 11); // assumes double-precision float to be written
1823 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1824 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1825 MATROSKA_ID_INFO, &mkv->info_pos);
1827 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1830 ret = mkv_write_tracks(s);
1834 for (i = 0; i < s->nb_chapters; i++)
1835 if (!s->chapters[i]->id) {
1836 mkv->chapter_id_offset = 1;
1840 ret = mkv_write_chapters(s);
1844 if (mkv->mode != MODE_WEBM) {
1845 ret = mkv_write_attachments(s);
1850 ret = mkv_write_tags(s);
1854 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1855 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1860 if (s->metadata_header_padding > 0) {
1861 if (s->metadata_header_padding == 1)
1862 s->metadata_header_padding++;
1863 put_ebml_void(pb, s->metadata_header_padding);
1866 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1867 mkv->cues_pos = avio_tell(pb);
1868 if (mkv->reserve_cues_space == 1)
1869 mkv->reserve_cues_space++;
1870 put_ebml_void(pb, mkv->reserve_cues_space);
1873 av_init_packet(&mkv->cur_audio_pkt);
1874 mkv->cur_audio_pkt.size = 0;
1875 mkv->cluster_pos = -1;
1877 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1878 // after 4k and on a keyframe
1879 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1880 if (mkv->cluster_time_limit < 0)
1881 mkv->cluster_time_limit = 5000;
1882 if (mkv->cluster_size_limit < 0)
1883 mkv->cluster_size_limit = 5 * 1024 * 1024;
1885 if (mkv->cluster_time_limit < 0)
1886 mkv->cluster_time_limit = 1000;
1887 if (mkv->cluster_size_limit < 0)
1888 mkv->cluster_size_limit = 32 * 1024;
1894 static int mkv_blockgroup_size(int pkt_size)
1896 int size = pkt_size + 4;
1897 size += ebml_num_size(size);
1898 size += 2; // EBML ID for block and block duration
1899 size += 9; // max size of block duration incl. length field
1903 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1910 dst = av_malloc(srclen);
1912 return AVERROR(ENOMEM);
1914 while (srclen >= WV_HEADER_SIZE) {
1917 ret = ff_wv_parse_header(&header, src);
1920 src += WV_HEADER_SIZE;
1921 srclen -= WV_HEADER_SIZE;
1923 if (srclen < header.blocksize) {
1924 ret = AVERROR_INVALIDDATA;
1928 if (header.initial) {
1929 AV_WL32(dst + offset, header.samples);
1932 AV_WL32(dst + offset, header.flags);
1933 AV_WL32(dst + offset + 4, header.crc);
1936 if (!(header.initial && header.final)) {
1937 AV_WL32(dst + offset, header.blocksize);
1941 memcpy(dst + offset, src, header.blocksize);
1942 src += header.blocksize;
1943 srclen -= header.blocksize;
1944 offset += header.blocksize;
1956 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1957 uint32_t blockid, AVPacket *pkt, int keyframe)
1959 MatroskaMuxContext *mkv = s->priv_data;
1960 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1961 mkv_track *track = &mkv->tracks[pkt->stream_index];
1962 uint8_t *data = NULL, *side_data = NULL;
1963 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1964 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1965 uint64_t additional_id;
1966 int64_t discard_padding = 0;
1967 unsigned track_number = track->track_num;
1968 ebml_master block_group, block_additions, block_more;
1970 ts += track->ts_offset;
1972 /* The following string is identical to the one in mkv_write_vtt_blocks
1973 * so that only one copy needs to exist in binaries. */
1974 av_log(s, AV_LOG_DEBUG,
1975 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1976 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1977 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
1978 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1979 mkv->cluster_pos, track_number, keyframe != 0);
1981 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1982 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1983 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1984 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1985 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1986 /* extradata is Annex B, assume the bitstream is too and convert it */
1987 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1988 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1989 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1990 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1991 err = mkv_strip_wavpack(pkt->data, &data, &size);
1996 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
1997 "a packet from stream %d.\n", pkt->stream_index);
2001 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2002 /* Matroska specification requires to remove the first QuickTime atom
2008 side_data = av_packet_get_side_data(pkt,
2009 AV_PKT_DATA_SKIP_SAMPLES,
2011 if (side_data && side_data_size >= 10) {
2012 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2013 (AVRational){1, par->sample_rate},
2014 (AVRational){1, 1000000000});
2017 side_data = av_packet_get_side_data(pkt,
2018 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2021 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2022 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2026 side_data_size -= 8;
2030 if (side_data_size || discard_padding) {
2031 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2032 blockid = MATROSKA_ID_BLOCK;
2035 put_ebml_id(pb, blockid);
2036 put_ebml_num(pb, size + 4, 0);
2037 // this assumes stream_index is less than 126
2038 avio_w8(pb, 0x80 | track_number);
2039 avio_wb16(pb, ts - mkv->cluster_pts);
2040 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2041 avio_write(pb, data + offset, size);
2042 if (data != pkt->data)
2045 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2046 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2048 track->last_timestamp = ts;
2050 if (discard_padding) {
2051 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2054 if (side_data_size) {
2055 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2056 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2057 /* Until dbc50f8a our demuxer used a wrong default value
2058 * of BlockAddID, so we write it unconditionally. */
2059 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2060 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2061 side_data, side_data_size);
2062 end_ebml_master(pb, block_more);
2063 end_ebml_master(pb, block_additions);
2065 if (side_data_size || discard_padding) {
2066 end_ebml_master(pb, block_group);
2072 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2074 MatroskaMuxContext *mkv = s->priv_data;
2075 mkv_track *track = &mkv->tracks[pkt->stream_index];
2076 ebml_master blockgroup;
2077 int id_size, settings_size, size;
2078 uint8_t *id, *settings;
2079 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2080 const int flags = 0;
2083 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2087 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2090 size = id_size + 1 + settings_size + 1 + pkt->size;
2092 /* The following string is identical to the one in mkv_write_block so that
2093 * only one copy needs to exist in binaries. */
2094 av_log(s, AV_LOG_DEBUG,
2095 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2096 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2097 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2098 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2099 mkv->cluster_pos, track->track_num, 1);
2101 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2103 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2104 put_ebml_num(pb, size + 4, 0);
2105 avio_w8(pb, 0x80 | track->track_num); // this assumes track_num is less than 126
2106 avio_wb16(pb, ts - mkv->cluster_pts);
2108 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2110 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2111 end_ebml_master(pb, blockgroup);
2113 return pkt->duration;
2116 static void mkv_end_cluster(AVFormatContext *s)
2118 MatroskaMuxContext *mkv = s->priv_data;
2120 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2121 mkv->cluster_pos = -1;
2122 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2125 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2127 MatroskaMuxContext *mkv = s->priv_data;
2128 mkv_track *track = &mkv->tracks[pkt->stream_index];
2129 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2131 int side_data_size = 0, ret;
2133 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2136 switch (par->codec_id) {
2137 case AV_CODEC_ID_AAC:
2138 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2139 int filler, output_sample_rate = 0;
2140 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2141 &output_sample_rate);
2144 if (!output_sample_rate)
2145 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2146 ret = ff_alloc_extradata(par, side_data_size);
2149 memcpy(par->extradata, side_data, side_data_size);
2150 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2151 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2152 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2154 put_ebml_void(mkv->tracks_bc, filler);
2155 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2156 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2157 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2158 } else if (!par->extradata_size && !track->sample_rate) {
2159 // No extradata (codecpar or packet side data).
2160 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2161 return AVERROR(EINVAL);
2164 case AV_CODEC_ID_FLAC:
2165 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2166 AVCodecParameters *codecpriv_par;
2167 if (side_data_size != par->extradata_size) {
2168 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2170 return AVERROR(EINVAL);
2172 codecpriv_par = avcodec_parameters_alloc();
2174 return AVERROR(ENOMEM);
2175 ret = avcodec_parameters_copy(codecpriv_par, par);
2177 avcodec_parameters_free(&codecpriv_par);
2180 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2181 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2182 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2183 avcodec_parameters_free(&codecpriv_par);
2186 // FIXME: Remove the following once libaom starts propagating extradata during init()
2187 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2188 case AV_CODEC_ID_AV1:
2189 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2190 !par->extradata_size) {
2191 AVIOContext *dyn_cp;
2194 ret = avio_open_dyn_buf(&dyn_cp);
2197 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2198 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2199 if (!codecpriv_size) {
2201 return AVERROR_INVALIDDATA;
2203 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2204 // Do not write the OBUs as we don't have space saved for them
2205 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2207 ret = ff_alloc_extradata(par, side_data_size);
2210 memcpy(par->extradata, side_data, side_data_size);
2211 } else if (!par->extradata_size)
2212 return AVERROR_INVALIDDATA;
2216 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2223 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2225 MatroskaMuxContext *mkv = s->priv_data;
2227 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2228 mkv_track *track = &mkv->tracks[pkt->stream_index];
2229 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2230 int duration = pkt->duration;
2232 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2233 int64_t relative_packet_pos;
2234 unsigned tracknum = track->track_num;
2236 if (ts == AV_NOPTS_VALUE) {
2237 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2238 return AVERROR(EINVAL);
2240 ts += track->ts_offset;
2242 if (mkv->cluster_pos != -1) {
2243 int64_t cluster_time = ts - mkv->cluster_pts;
2244 if ((int16_t)cluster_time != cluster_time) {
2246 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2250 if (mkv->cluster_pos == -1) {
2251 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2254 mkv->cluster_pos = avio_tell(s->pb);
2255 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2256 mkv->cluster_pts = FFMAX(0, ts);
2257 av_log(s, AV_LOG_DEBUG,
2258 "Starting new cluster with timestamp "
2259 "%" PRId64 " at offset %" PRId64 " bytes\n",
2260 mkv->cluster_pts, mkv->cluster_pos);
2262 pb = mkv->cluster_bc;
2264 relative_packet_pos = avio_tell(pb);
2266 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2267 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2270 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2271 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2272 mkv->cluster_pos, relative_packet_pos, -1);
2273 if (ret < 0) return ret;
2276 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2277 duration = mkv_write_vtt_blocks(s, pb, pkt);
2279 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2280 mkv_blockgroup_size(pkt->size));
2282 #if FF_API_CONVERGENCE_DURATION
2283 FF_DISABLE_DEPRECATION_WARNINGS
2284 /* For backward compatibility, prefer convergence_duration. */
2285 if (pkt->convergence_duration > 0) {
2286 duration = pkt->convergence_duration;
2288 FF_ENABLE_DEPRECATION_WARNINGS
2290 /* All subtitle blocks are considered to be keyframes. */
2291 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2292 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2293 end_ebml_master(pb, blockgroup);
2296 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2297 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2298 mkv->cluster_pos, relative_packet_pos, duration);
2304 mkv->duration = FFMAX(mkv->duration, ts + duration);
2305 track->duration = FFMAX(track->duration, ts + duration);
2310 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2312 MatroskaMuxContext *mkv = s->priv_data;
2313 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2314 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2316 int64_t cluster_time;
2318 int start_new_cluster;
2320 ret = mkv_check_new_extra_data(s, pkt);
2324 if (mkv->tracks[pkt->stream_index].write_dts)
2325 cluster_time = pkt->dts - mkv->cluster_pts;
2327 cluster_time = pkt->pts - mkv->cluster_pts;
2328 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2330 cluster_size = avio_tell(mkv->cluster_bc);
2332 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2333 // WebM DASH specification states that the first block of every cluster
2334 // has to be a key frame. So for DASH video, we only create a cluster
2335 // on seeing key frames.
2336 start_new_cluster = keyframe;
2337 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2338 (mkv->cluster_pos == -1 ||
2339 cluster_time > mkv->cluster_time_limit)) {
2340 // For DASH audio, we create a Cluster based on cluster_time_limit
2341 start_new_cluster = 1;
2342 } else if (!mkv->is_dash &&
2343 (cluster_size > mkv->cluster_size_limit ||
2344 cluster_time > mkv->cluster_time_limit ||
2345 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2346 cluster_size > 4 * 1024))) {
2347 start_new_cluster = 1;
2349 start_new_cluster = 0;
2352 if (mkv->cluster_pos != -1 && start_new_cluster) {
2356 if (!mkv->cluster_pos)
2357 avio_write_marker(s->pb,
2358 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2359 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2361 // check if we have an audio packet cached
2362 if (mkv->cur_audio_pkt.size > 0) {
2363 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2364 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2365 mkv->is_dash ? start_new_cluster : 0);
2366 av_packet_unref(&mkv->cur_audio_pkt);
2368 av_log(s, AV_LOG_ERROR,
2369 "Could not write cached audio packet ret:%d\n", ret);
2374 // buffer an audio packet to ensure the packet containing the video
2375 // keyframe's timecode is contained in the same cluster for WebM
2376 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2378 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2380 ret = mkv_write_packet_internal(s, pkt, 0);
2384 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2386 MatroskaMuxContext *mkv = s->priv_data;
2389 if (mkv->cluster_pos != -1) {
2391 av_log(s, AV_LOG_DEBUG,
2392 "Flushing cluster at offset %" PRIu64 " bytes\n",
2397 return mkv_write_packet(s, pkt);
2400 static int mkv_write_trailer(AVFormatContext *s)
2402 MatroskaMuxContext *mkv = s->priv_data;
2403 AVIOContext *pb = s->pb;
2406 // check if we have an audio packet cached
2407 if (mkv->cur_audio_pkt.size > 0) {
2408 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2410 av_log(s, AV_LOG_ERROR,
2411 "Could not write cached audio packet ret:%d\n", ret);
2416 if (mkv->cluster_bc) {
2417 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2418 MATROSKA_ID_CLUSTER, 0, 0);
2421 ret = mkv_write_chapters(s);
2426 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2427 int64_t endpos, ret64;
2429 endpos = avio_tell(pb);
2431 if (mkv->cues.num_entries) {
2432 AVIOContext *cues = NULL;
2434 int64_t cuespos = endpos;
2435 int length_size = 0;
2437 ret = start_ebml_master_crc32(&cues, mkv);
2441 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2442 mkv->tracks, s->nb_streams);
2444 ffio_free_dyn_buf(&cues);
2448 if (mkv->reserve_cues_space) {
2449 size = avio_tell(cues);
2450 length_size = ebml_num_size(size);
2451 size += 4 + length_size;
2452 if (mkv->reserve_cues_space < size) {
2453 av_log(s, AV_LOG_WARNING,
2454 "Insufficient space reserved for Cues: "
2455 "%d < %"PRIu64". No Cues will be output.\n",
2456 mkv->reserve_cues_space, size);
2457 mkv->reserve_cues_space = -1;
2458 ffio_free_dyn_buf(&cues);
2461 cuespos = mkv->cues_pos;
2462 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2463 ffio_free_dyn_buf(&cues);
2466 if (mkv->reserve_cues_space == size + 1) {
2467 /* There is no way to reserve a single byte because
2468 * the minimal size of an EBML Void element is 2
2469 * (1 byte ID, 1 byte length field). This problem
2470 * is solved by writing the Cues' length field on
2471 * one byte more than necessary. */
2477 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2478 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2480 if (mkv->reserve_cues_space) {
2481 if (size < mkv->reserve_cues_space)
2482 put_ebml_void(pb, mkv->reserve_cues_space - size);
2484 endpos = avio_tell(pb);
2488 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2492 // update the duration
2493 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2494 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2495 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2496 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2498 // write tracks master
2499 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2500 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2502 // update stream durations
2505 for (i = 0; i < s->nb_streams; ++i) {
2506 AVStream *st = s->streams[i];
2507 mkv_track *track = &mkv->tracks[i];
2509 if (track->duration_offset > 0) {
2510 double duration_sec = track->duration * av_q2d(st->time_base);
2511 char duration_string[20] = "";
2513 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2516 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2518 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2519 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2520 fmod(duration_sec, 60));
2522 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2526 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2527 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2530 avio_seek(pb, endpos, SEEK_SET);
2533 if (!mkv->is_live) {
2534 end_ebml_master(pb, mkv->segment);
2537 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2540 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2543 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2544 if (ff_mkv_codec_tags[i].id == codec_id)
2547 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2548 enum AVMediaType type = avcodec_get_type(codec_id);
2549 // mkv theoretically supports any video/audio through VFW/ACM
2550 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2557 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2560 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2561 if (ff_webm_codec_tags[i].id == codec_id)
2567 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2572 uid = (uint64_t)av_lfg_get(c) << 32;
2573 uid |= av_lfg_get(c);
2576 for (k = 0; k < i; k++) {
2577 if (tracks[k].uid == uid)
2585 static int mkv_init(struct AVFormatContext *s)
2587 MatroskaMuxContext *mkv = s->priv_data;
2589 unsigned nb_tracks = 0;
2592 for (i = 0; i < s->nb_streams; i++) {
2593 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2594 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2595 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2596 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2597 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2598 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2599 av_log(s, AV_LOG_ERROR,
2600 "The Matroska muxer does not yet support muxing %s\n",
2601 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2602 return AVERROR_PATCHWELCOME;
2606 if (s->avoid_negative_ts < 0) {
2607 s->avoid_negative_ts = 1;
2608 s->internal->avoid_negative_ts_use_pts = 1;
2611 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2613 return AVERROR(ENOMEM);
2616 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2617 av_lfg_init(&c, av_get_random_seed());
2619 // Calculate the SegmentUID now in order not to waste our random seed.
2620 for (i = 0; i < 4; i++)
2621 mkv->segment_uid[i] = av_lfg_get(&c);
2624 for (i = 0; i < s->nb_streams; i++) {
2625 AVStream *st = s->streams[i];
2626 mkv_track *track = &mkv->tracks[i];
2628 if (s->flags & AVFMT_FLAG_BITEXACT) {
2631 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2634 // ms precision is the de-facto standard timescale for mkv files
2635 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2637 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
2641 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2644 if (nb_tracks > MAX_TRACKS) {
2645 av_log(s, AV_LOG_ERROR,
2646 "%u > "AV_STRINGIFY(MAX_TRACKS)" tracks (excluding attachments)"
2647 " not supported for muxing in Matroska\n", nb_tracks);
2648 return AVERROR(EINVAL);
2654 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2657 AVStream *st = s->streams[pkt->stream_index];
2659 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2660 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2661 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2662 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2663 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2669 static const AVCodecTag additional_audio_tags[] = {
2670 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2671 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2672 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2673 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2674 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2675 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2676 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2677 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2678 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2679 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2680 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2681 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2682 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2685 static const AVCodecTag additional_video_tags[] = {
2686 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2687 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2688 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2689 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2692 static const AVCodecTag additional_subtitle_tags[] = {
2693 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2694 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2695 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2696 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2699 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2700 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2701 static const AVOption options[] = {
2702 { "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 },
2703 { "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 },
2704 { "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 },
2705 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2706 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2707 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2708 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2709 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2713 #if CONFIG_MATROSKA_MUXER
2714 static const AVClass matroska_class = {
2715 .class_name = "matroska muxer",
2716 .item_name = av_default_item_name,
2718 .version = LIBAVUTIL_VERSION_INT,
2721 AVOutputFormat ff_matroska_muxer = {
2723 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2724 .mime_type = "video/x-matroska",
2725 .extensions = "mkv",
2726 .priv_data_size = sizeof(MatroskaMuxContext),
2727 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2728 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2729 .video_codec = CONFIG_LIBX264_ENCODER ?
2730 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2732 .deinit = mkv_deinit,
2733 .write_header = mkv_write_header,
2734 .write_packet = mkv_write_flush_packet,
2735 .write_trailer = mkv_write_trailer,
2736 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2737 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2738 .codec_tag = (const AVCodecTag* const []){
2739 ff_codec_bmp_tags, ff_codec_wav_tags,
2740 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2742 .subtitle_codec = AV_CODEC_ID_ASS,
2743 .query_codec = mkv_query_codec,
2744 .check_bitstream = mkv_check_bitstream,
2745 .priv_class = &matroska_class,
2749 #if CONFIG_WEBM_MUXER
2750 static const AVClass webm_class = {
2751 .class_name = "webm muxer",
2752 .item_name = av_default_item_name,
2754 .version = LIBAVUTIL_VERSION_INT,
2757 AVOutputFormat ff_webm_muxer = {
2759 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2760 .mime_type = "video/webm",
2761 .extensions = "webm",
2762 .priv_data_size = sizeof(MatroskaMuxContext),
2763 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2764 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2765 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2767 .deinit = mkv_deinit,
2768 .write_header = mkv_write_header,
2769 .write_packet = mkv_write_flush_packet,
2770 .write_trailer = mkv_write_trailer,
2771 .query_codec = webm_query_codec,
2772 .check_bitstream = mkv_check_bitstream,
2773 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2774 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2775 .priv_class = &webm_class,
2779 #if CONFIG_MATROSKA_AUDIO_MUXER
2780 static const AVClass mka_class = {
2781 .class_name = "matroska audio muxer",
2782 .item_name = av_default_item_name,
2784 .version = LIBAVUTIL_VERSION_INT,
2786 AVOutputFormat ff_matroska_audio_muxer = {
2788 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2789 .mime_type = "audio/x-matroska",
2790 .extensions = "mka",
2791 .priv_data_size = sizeof(MatroskaMuxContext),
2792 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2793 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2794 .video_codec = AV_CODEC_ID_NONE,
2796 .deinit = mkv_deinit,
2797 .write_header = mkv_write_header,
2798 .write_packet = mkv_write_flush_packet,
2799 .write_trailer = mkv_write_trailer,
2800 .check_bitstream = mkv_check_bitstream,
2801 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2803 .codec_tag = (const AVCodecTag* const []){
2804 ff_codec_wav_tags, additional_audio_tags, 0
2806 .priv_class = &mka_class,