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 {
81 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
82 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
83 int64_t duration; ///< duration of the block according to time base
86 typedef struct mkv_cues {
87 mkv_cuepoint *entries;
91 typedef struct mkv_track {
97 int64_t sample_rate_offset;
98 int64_t last_timestamp;
100 int64_t duration_offset;
101 int64_t codecpriv_offset;
105 #define MODE_MATROSKAv2 0x01
106 #define MODE_WEBM 0x02
108 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
109 * range 1 to 126 (inclusive) */
110 #define MAX_TRACKS 126
112 typedef struct MatroskaMuxContext {
113 const AVClass *class;
115 AVIOContext *tags_bc;
117 AVIOContext *info_bc;
119 AVIOContext *tracks_bc;
122 int64_t segment_offset;
123 AVIOContext *cluster_bc;
124 int64_t cluster_pos; ///< file offset of the current cluster
126 int64_t duration_offset;
128 mkv_seekhead seekhead;
132 AVPacket cur_audio_pkt;
134 int have_attachments;
137 int reserve_cues_space;
138 int cluster_size_limit;
140 int64_t cluster_time_limit;
142 int dash_track_number;
146 uint32_t chapter_id_offset;
151 uint32_t segment_uid[4];
152 } MatroskaMuxContext;
154 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
155 * 8 byte for "matroska" doctype string */
156 #define MAX_EBML_HEADER_SIZE 35
158 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
159 * offset, 4 bytes for target EBML ID */
160 #define MAX_SEEKENTRY_SIZE 21
162 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
163 #define MAX_CUETRACKPOS_SIZE 40
165 /** Seek preroll value for opus */
166 #define OPUS_SEEK_PREROLL 80000000
168 static int ebml_id_size(uint32_t id)
170 return (av_log2(id) + 7U) / 8;
173 static void put_ebml_id(AVIOContext *pb, uint32_t id)
175 int i = ebml_id_size(id);
177 avio_w8(pb, (uint8_t)(id >> (i * 8)));
181 * Write an EBML size meaning "unknown size".
183 * @param bytes The number of bytes the size should occupy (maximum: 8).
185 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
187 av_assert0(bytes <= 8);
188 avio_w8(pb, 0x1ff >> bytes);
189 ffio_fill(pb, 0xff, bytes - 1);
193 * Calculate how many bytes are needed to represent the length field
194 * of an EBML element whose payload has a given length.
196 static int ebml_length_size(uint64_t length)
202 } while (length >>= 7);
207 * Write a length as EBML variable length integer.
209 * @param bytes The number of bytes that need to be used to write the number.
210 * If zero, the minimal number of bytes will be used.
212 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
214 int i, needed_bytes = ebml_length_size(length);
216 // sizes larger than this are currently undefined in EBML
217 av_assert0(length < (1ULL << 56) - 1);
220 bytes = needed_bytes;
221 // The bytes needed to write the given size must not exceed
222 // the bytes that we ought to use.
223 av_assert0(bytes >= needed_bytes);
225 length |= 1ULL << bytes * 7;
226 for (i = bytes - 1; i >= 0; i--)
227 avio_w8(pb, (uint8_t)(length >> i * 8));
231 * Write a (random) UID with fixed size to make the output more deterministic
233 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
235 put_ebml_id(pb, elementid);
236 put_ebml_length(pb, 8, 0);
240 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
247 put_ebml_id(pb, elementid);
248 put_ebml_length(pb, bytes, 0);
249 for (i = bytes - 1; i >= 0; i--)
250 avio_w8(pb, (uint8_t)(val >> i * 8));
253 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
256 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
258 while (tmp>>=8) bytes++;
260 put_ebml_id(pb, elementid);
261 put_ebml_length(pb, bytes, 0);
262 for (i = bytes - 1; i >= 0; i--)
263 avio_w8(pb, (uint8_t)(val >> i * 8));
266 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
268 put_ebml_id(pb, elementid);
269 put_ebml_length(pb, 8, 0);
270 avio_wb64(pb, av_double2int(val));
273 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
274 const void *buf, int size)
276 put_ebml_id(pb, elementid);
277 put_ebml_length(pb, size, 0);
278 avio_write(pb, buf, size);
281 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
284 put_ebml_binary(pb, elementid, str, strlen(str));
288 * Write a void element of a given size. Useful for reserving space in
289 * the file to be written to later.
291 * @param size The number of bytes to reserve, which must be at least 2.
293 static void put_ebml_void(AVIOContext *pb, int size)
295 av_assert0(size >= 2);
297 put_ebml_id(pb, EBML_ID_VOID);
298 // we need to subtract the length needed to store the size from the
299 // size we need to reserve so 2 cases, we use 8 bytes to store the
300 // size if possible, 1 byte otherwise
303 put_ebml_length(pb, size, 0);
306 put_ebml_length(pb, size, 8);
308 ffio_fill(pb, 0, size);
311 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
312 uint64_t expectedsize)
314 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
316 put_ebml_id(pb, elementid);
317 put_ebml_size_unknown(pb, bytes);
318 return (ebml_master) { avio_tell(pb), bytes };
321 static void end_ebml_master(AVIOContext *pb, ebml_master master)
323 int64_t pos = avio_tell(pb);
325 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
327 put_ebml_length(pb, pos - master.pos, master.sizebytes);
328 avio_seek(pb, pos, SEEK_SET);
331 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
335 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
339 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
344 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
345 MatroskaMuxContext *mkv, uint32_t id,
346 int length_size, int keep_buffer)
348 uint8_t *buf, crc[4];
352 size = avio_get_dyn_buf(*dyn_cp, &buf);
353 put_ebml_length(pb, size, length_size);
354 if (mkv->write_crc) {
355 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
356 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
357 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
359 avio_write(pb, buf + skip, size - skip);
362 ffio_reset_dyn_buf(*dyn_cp);
364 ffio_free_dyn_buf(dyn_cp);
369 * Complete ebml master without destroying the buffer, allowing for later updates
371 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
372 uint32_t id, int64_t *pos)
375 int size = avio_get_dyn_buf(dyn_cp, &buf);
377 *pos = avio_tell(pb);
380 put_ebml_length(pb, size, 0);
381 avio_write(pb, buf, size);
384 static void put_xiph_size(AVIOContext *pb, int size)
386 ffio_fill(pb, 255, size / 255);
387 avio_w8(pb, size % 255);
391 * Free the members allocated in the mux context.
393 static void mkv_deinit(AVFormatContext *s)
395 MatroskaMuxContext *mkv = s->priv_data;
397 av_packet_unref(&mkv->cur_audio_pkt);
399 ffio_free_dyn_buf(&mkv->cluster_bc);
400 ffio_free_dyn_buf(&mkv->info_bc);
401 ffio_free_dyn_buf(&mkv->tracks_bc);
402 ffio_free_dyn_buf(&mkv->tags_bc);
404 av_freep(&mkv->cues.entries);
405 av_freep(&mkv->tracks);
409 * Initialize the SeekHead element to be ready to index level 1 Matroska
410 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
411 * will be reserved at the current file location.
413 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
415 mkv->seekhead.filepos = avio_tell(pb);
416 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
417 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
418 // that an EBML void element will fit afterwards
419 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
420 put_ebml_void(pb, mkv->seekhead.reserved_size);
423 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
426 mkv_seekhead *seekhead = &mkv->seekhead;
428 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
430 seekhead->entries[seekhead->num_entries].elementid = elementid;
431 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
435 * Write the SeekHead to the file at the location reserved for it
436 * and seek to destpos afterwards. When error_on_seek_failure
437 * is not set, failure to seek to the position designated for the
438 * SeekHead is not considered an error and it is presumed that
439 * destpos is the current position; failure to seek to destpos
440 * afterwards is always an error.
442 * @return 0 on success, < 0 on error.
444 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
445 int error_on_seek_failure, int64_t destpos)
447 AVIOContext *dyn_cp = NULL;
448 mkv_seekhead *seekhead = &mkv->seekhead;
449 int64_t remaining, ret64;
452 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
453 return error_on_seek_failure ? ret64 : 0;
455 ret = start_ebml_master_crc32(&dyn_cp, mkv);
459 for (i = 0; i < seekhead->num_entries; i++) {
460 mkv_seekhead_entry *entry = &seekhead->entries[i];
461 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
464 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
465 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
466 put_ebml_id(dyn_cp, entry->elementid);
468 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
469 end_ebml_master(dyn_cp, seekentry);
471 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
473 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
474 put_ebml_void(pb, remaining);
476 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
482 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
483 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
485 mkv_cues *cues = &mkv->cues;
486 mkv_cuepoint *entries = cues->entries;
491 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
493 return AVERROR(ENOMEM);
494 cues->entries = entries;
496 cues->entries[cues->num_entries].pts = ts;
497 cues->entries[cues->num_entries].stream_idx = stream;
498 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
499 cues->entries[cues->num_entries].relative_pos = relative_pos;
500 cues->entries[cues->num_entries++].duration = duration;
505 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
506 mkv_cues *cues, mkv_track *tracks, int num_tracks)
508 AVIOContext *cuepoint;
511 ret = avio_open_dyn_buf(&cuepoint);
515 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
517 uint64_t pts = entry->pts;
521 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
523 // put all the entries from different tracks that have the exact same
524 // timestamp into the same CuePoint
525 for (int j = 0; j < num_tracks; j++)
526 tracks[j].has_cue = 0;
528 ebml_master track_positions;
529 int idx = entry->stream_idx;
531 av_assert0(idx >= 0 && idx < num_tracks);
532 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
534 tracks[idx].has_cue = 1;
535 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
536 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
537 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
538 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
539 if (entry->duration != -1)
540 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
541 end_ebml_master(cuepoint, track_positions);
542 } while (++entry < end && entry->pts == pts);
543 size = avio_get_dyn_buf(cuepoint, &buf);
544 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
545 ffio_reset_dyn_buf(cuepoint);
547 ffio_free_dyn_buf(&cuepoint);
552 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
554 const uint8_t *header_start[3];
556 int first_header_size;
559 if (par->codec_id == AV_CODEC_ID_VORBIS)
560 first_header_size = 30;
562 first_header_size = 42;
564 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
565 first_header_size, header_start, header_len) < 0) {
566 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
570 avio_w8(pb, 2); // number packets - 1
571 for (j = 0; j < 2; j++) {
572 put_xiph_size(pb, header_len[j]);
574 for (j = 0; j < 3; j++)
575 avio_write(pb, header_start[j], header_len[j]);
580 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
582 if (par->extradata && par->extradata_size == 2)
583 avio_write(pb, par->extradata, 2);
585 avio_wl16(pb, 0x410); // fallback to the most recent version
589 static int put_flac_codecpriv(AVFormatContext *s,
590 AVIOContext *pb, AVCodecParameters *par)
592 int write_comment = (par->channel_layout &&
593 !(par->channel_layout & ~0x3ffffULL) &&
594 !ff_flac_is_native_layout(par->channel_layout));
595 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
602 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
603 "Lavf" : LIBAVFORMAT_IDENT;
604 AVDictionary *dict = NULL;
605 uint8_t buf[32], *data, *p;
608 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
609 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
611 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
612 if (len >= ((1<<24) - 4)) {
614 return AVERROR(EINVAL);
617 data = av_malloc(len + 4);
620 return AVERROR(ENOMEM);
624 AV_WB24(data + 1, len);
627 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
629 avio_write(pb, data, len + 4);
638 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
639 int *sample_rate, int *output_sample_rate)
641 MPEG4AudioConfig mp4ac;
644 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
645 /* Don't abort if the failure is because of missing extradata. Assume in that
646 * case a bitstream filter will provide the muxer with the extradata in the
648 * Abort however if s->pb is not seekable, as we would not be able to seek back
649 * to write the sample rate elements once the extradata shows up, anyway. */
650 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
651 av_log(s, AV_LOG_ERROR,
652 "Error parsing AAC extradata, unable to determine samplerate.\n");
653 return AVERROR(EINVAL);
657 /* This will only happen when this function is called while writing the
658 * header and no extradata is available. The space for this element has
659 * to be reserved for when this function is called again after the
660 * extradata shows up in the first packet, as there's no way to know if
661 * output_sample_rate will be different than sample_rate or not. */
662 *output_sample_rate = *sample_rate;
664 *sample_rate = mp4ac.sample_rate;
665 *output_sample_rate = mp4ac.ext_sample_rate;
670 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
671 AVCodecParameters *par,
674 switch (par->codec_id) {
675 case AV_CODEC_ID_VORBIS:
676 case AV_CODEC_ID_THEORA:
677 return put_xiph_codecpriv(s, dyn_cp, par);
678 case AV_CODEC_ID_FLAC:
679 return put_flac_codecpriv(s, dyn_cp, par);
680 case AV_CODEC_ID_WAVPACK:
681 return put_wv_codecpriv(dyn_cp, par);
682 case AV_CODEC_ID_H264:
683 return ff_isom_write_avcc(dyn_cp, par->extradata,
684 par->extradata_size);
685 case AV_CODEC_ID_HEVC:
686 return ff_isom_write_hvcc(dyn_cp, par->extradata,
687 par->extradata_size, 0);
688 case AV_CODEC_ID_AV1:
689 if (par->extradata_size)
690 return ff_isom_write_av1c(dyn_cp, par->extradata,
691 par->extradata_size);
693 put_ebml_void(pb, 4 + 3);
695 case AV_CODEC_ID_ALAC:
696 if (par->extradata_size < 36) {
697 av_log(s, AV_LOG_ERROR,
698 "Invalid extradata found, ALAC expects a 36-byte "
700 return AVERROR_INVALIDDATA;
702 avio_write(dyn_cp, par->extradata + 12,
703 par->extradata_size - 12);
705 case AV_CODEC_ID_AAC:
706 if (par->extradata_size)
707 avio_write(dyn_cp, par->extradata, par->extradata_size);
709 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
712 if (par->codec_id == AV_CODEC_ID_PRORES &&
713 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
714 avio_wl32(dyn_cp, par->codec_tag);
715 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
716 avio_write(dyn_cp, par->extradata, par->extradata_size);
722 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
723 AVCodecParameters *par,
724 int native_id, int qt_id)
728 int ret, codecpriv_size;
730 ret = avio_open_dyn_buf(&dyn_cp);
735 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
736 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
739 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
741 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
742 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
745 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
746 avio_wl32(dyn_cp, par->codec_tag);
747 for(i = 0; i < 0x5a - 8; i++)
750 avio_write(dyn_cp, par->extradata, par->extradata_size);
752 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
753 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
754 avcodec_get_name(par->codec_id));
757 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
759 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
760 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
761 avcodec_get_name(par->codec_id));
762 ret = AVERROR(EINVAL);
765 ff_put_bmp_header(dyn_cp, par, 0, 0);
767 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
769 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
771 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
772 avcodec_get_name(par->codec_id));
773 ret = AVERROR(EINVAL);
776 par->codec_tag = tag;
778 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
781 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
783 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
785 ffio_free_dyn_buf(&dyn_cp);
789 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
791 uint8_t *colorinfo_ptr;
792 int side_data_size = 0;
793 int ret, colorinfo_size;
794 const uint8_t *side_data;
796 ret = avio_open_dyn_buf(&dyn_cp);
800 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
801 par->color_trc < AVCOL_TRC_NB) {
802 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
805 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
806 par->color_space < AVCOL_SPC_NB) {
807 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
809 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
810 par->color_primaries < AVCOL_PRI_NB) {
811 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
813 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
814 par->color_range < AVCOL_RANGE_NB) {
815 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
817 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
818 par->chroma_location <= AVCHROMA_LOC_TOP) {
821 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
823 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
826 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
828 if (side_data_size) {
829 const AVContentLightMetadata *metadata =
830 (const AVContentLightMetadata*)side_data;
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
832 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
835 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
837 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
838 ebml_master meta_element = start_ebml_master(
839 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
840 const AVMasteringDisplayMetadata *metadata =
841 (const AVMasteringDisplayMetadata*)side_data;
842 if (metadata->has_primaries) {
843 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
844 av_q2d(metadata->display_primaries[0][0]));
845 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
846 av_q2d(metadata->display_primaries[0][1]));
847 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
848 av_q2d(metadata->display_primaries[1][0]));
849 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
850 av_q2d(metadata->display_primaries[1][1]));
851 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
852 av_q2d(metadata->display_primaries[2][0]));
853 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
854 av_q2d(metadata->display_primaries[2][1]));
855 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
856 av_q2d(metadata->white_point[0]));
857 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
858 av_q2d(metadata->white_point[1]));
860 if (metadata->has_luminance) {
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
862 av_q2d(metadata->max_luminance));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
864 av_q2d(metadata->min_luminance));
866 end_ebml_master(dyn_cp, meta_element);
869 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
870 if (colorinfo_size) {
871 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
872 avio_write(pb, colorinfo_ptr, colorinfo_size);
873 end_ebml_master(pb, colorinfo);
875 ffio_free_dyn_buf(&dyn_cp);
879 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
882 ebml_master projection;
883 int side_data_size = 0;
886 const AVSphericalMapping *spherical =
887 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
893 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
894 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
895 spherical->projection != AV_SPHERICAL_CUBEMAP) {
896 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
900 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
901 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
902 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
903 4 * (2 + 1 + 8) + (2 + 1 + 20));
905 switch (spherical->projection) {
906 case AV_SPHERICAL_EQUIRECTANGULAR:
907 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
908 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
910 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
911 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
912 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
913 AV_WB32(private, 0); // version + flags
914 AV_WB32(private + 4, spherical->bound_top);
915 AV_WB32(private + 8, spherical->bound_bottom);
916 AV_WB32(private + 12, spherical->bound_left);
917 AV_WB32(private + 16, spherical->bound_right);
918 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
921 case AV_SPHERICAL_CUBEMAP:
922 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
923 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
924 AV_WB32(private, 0); // version + flags
925 AV_WB32(private + 4, 0); // layout
926 AV_WB32(private + 8, spherical->padding);
927 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
935 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
936 (double) spherical->yaw / (1 << 16));
937 if (spherical->pitch)
938 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
939 (double) spherical->pitch / (1 << 16));
941 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
942 (double) spherical->roll / (1 << 16));
944 end_ebml_master(pb, projection);
949 static void mkv_write_field_order(AVIOContext *pb, int mode,
950 enum AVFieldOrder field_order)
952 switch (field_order) {
953 case AV_FIELD_UNKNOWN:
955 case AV_FIELD_PROGRESSIVE:
956 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
957 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
963 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
964 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
965 if (mode != MODE_WEBM) {
966 switch (field_order) {
968 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
969 MATROSKA_VIDEO_FIELDORDER_TT);
972 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
973 MATROSKA_VIDEO_FIELDORDER_BB);
976 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
977 MATROSKA_VIDEO_FIELDORDER_TB);
980 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
981 MATROSKA_VIDEO_FIELDORDER_BT);
988 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
989 AVStream *st, int mode, int *h_width, int *h_height)
993 AVDictionaryEntry *tag;
994 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
998 // convert metadata into proper side data and add it to the stream
999 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1000 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1001 int stereo_mode = atoi(tag->value);
1003 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1004 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1009 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1010 stereo_mode != 10 && stereo_mode != 12) {
1011 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1017 // iterate to find the stereo3d side data
1018 for (i = 0; i < st->nb_side_data; i++) {
1019 AVPacketSideData sd = st->side_data[i];
1020 if (sd.type == AV_PKT_DATA_STEREO3D) {
1021 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1023 switch (stereo->type) {
1024 case AV_STEREO3D_2D:
1025 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1027 case AV_STEREO3D_SIDEBYSIDE:
1028 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1029 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1030 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1033 case AV_STEREO3D_TOPBOTTOM:
1034 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1035 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1039 case AV_STEREO3D_CHECKERBOARD:
1040 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1041 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1044 case AV_STEREO3D_LINES:
1045 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1046 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1050 case AV_STEREO3D_COLUMNS:
1051 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1052 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1056 case AV_STEREO3D_FRAMESEQUENCE:
1057 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1058 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1066 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1069 // if webm, do not write unsupported modes
1070 if ((mode == MODE_WEBM &&
1071 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1072 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1073 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1074 av_log(s, AV_LOG_ERROR,
1075 "The specified stereo mode is not valid.\n");
1076 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1077 return AVERROR(EINVAL);
1080 // write StereoMode if format is valid
1081 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1086 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1087 AVStream *st, mkv_track *track, AVIOContext *pb,
1088 int default_stream_exists)
1090 AVCodecParameters *par = st->codecpar;
1091 ebml_master subinfo, track_master;
1095 int sample_rate = par->sample_rate;
1096 int output_sample_rate = 0;
1097 int display_width_div = 1;
1098 int display_height_div = 1;
1100 AVDictionaryEntry *tag;
1102 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1103 mkv->have_attachments = 1;
1107 if (par->codec_id == AV_CODEC_ID_AAC) {
1108 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1109 &output_sample_rate);
1114 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1115 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1116 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1117 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1119 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1120 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1121 tag = av_dict_get(st->metadata, "language", NULL, 0);
1122 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1123 tag && tag->value ? tag->value : "und");
1125 // The default value for TRACKFLAGDEFAULT is 1, so add element
1126 // if we need to clear it.
1127 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1128 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1130 if (st->disposition & AV_DISPOSITION_FORCED)
1131 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1133 if (mkv->mode == MODE_WEBM) {
1134 const char *codec_id;
1135 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1136 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1137 if (ff_webm_codec_tags[j].id == par->codec_id) {
1138 codec_id = ff_webm_codec_tags[j].str;
1143 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1144 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1145 codec_id = "D_WEBVTT/CAPTIONS";
1146 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1147 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1148 codec_id = "D_WEBVTT/DESCRIPTIONS";
1149 native_id = MATROSKA_TRACK_TYPE_METADATA;
1150 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1151 codec_id = "D_WEBVTT/METADATA";
1152 native_id = MATROSKA_TRACK_TYPE_METADATA;
1154 codec_id = "D_WEBVTT/SUBTITLES";
1155 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1160 av_log(s, AV_LOG_ERROR,
1161 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1162 return AVERROR(EINVAL);
1165 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1167 // look for a codec ID string specific to mkv to use,
1168 // if none are found, use AVI codes
1169 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1170 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1171 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1172 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1178 if (mkv->allow_raw_vfw) {
1181 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1182 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1183 return AVERROR(EINVAL);
1188 switch (par->codec_type) {
1189 case AVMEDIA_TYPE_VIDEO:
1190 mkv->have_video = 1;
1191 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1193 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1194 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1195 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1196 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1197 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1198 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1201 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1202 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1203 par->codec_id == AV_CODEC_ID_SVQ1 ||
1204 par->codec_id == AV_CODEC_ID_SVQ3 ||
1205 par->codec_id == AV_CODEC_ID_CINEPAK))
1209 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1210 else if (!native_id) {
1211 // if there is no mkv-specific codec ID, use VFW mode
1212 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1213 track->write_dts = 1;
1214 s->internal->avoid_negative_ts_use_pts = 0;
1217 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1219 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1220 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1222 mkv_write_field_order(pb, mkv->mode, par->field_order);
1224 // check both side data and metadata for stereo information,
1225 // write the result to the bitstream if any is found
1226 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1228 &display_height_div);
1232 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1233 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1234 (par->format == AV_PIX_FMT_YUVA420P)) {
1235 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1238 // write DisplayWidth and DisplayHeight, they contain the size of
1239 // a single source view and/or the display aspect ratio
1240 if (st->sample_aspect_ratio.num) {
1241 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1242 if (d_width > INT_MAX) {
1243 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1244 return AVERROR(EINVAL);
1246 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1247 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1248 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1249 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1251 AVRational display_aspect_ratio;
1252 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1253 par->width * (int64_t)st->sample_aspect_ratio.num,
1254 par->height * (int64_t)st->sample_aspect_ratio.den,
1256 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1257 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1258 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1261 } else if (display_width_div != 1 || display_height_div != 1) {
1262 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1263 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1264 } else if (mkv->mode != MODE_WEBM)
1265 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1267 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1268 uint32_t color_space = av_le2ne32(par->codec_tag);
1269 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1271 ret = mkv_write_video_color(pb, par, st);
1274 ret = mkv_write_video_projection(s, pb, st);
1277 end_ebml_master(pb, subinfo);
1280 case AVMEDIA_TYPE_AUDIO:
1281 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1282 int64_t codecdelay = av_rescale_q(par->initial_padding,
1283 (AVRational){ 1, 48000 },
1284 (AVRational){ 1, 1000000000 });
1285 if (codecdelay < 0) {
1286 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1287 return AVERROR(EINVAL);
1289 // track->ts_offset = av_rescale_q(par->initial_padding,
1290 // (AVRational){ 1, par->sample_rate },
1293 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1295 if (par->codec_id == AV_CODEC_ID_OPUS)
1296 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1298 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1301 // no mkv-specific ID, use ACM mode
1302 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1304 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1305 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1307 track->sample_rate_offset = avio_tell(pb);
1308 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1309 if (output_sample_rate)
1310 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1312 bit_depth = av_get_bits_per_sample(par->codec_id);
1313 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1314 if (par->bits_per_raw_sample)
1315 bit_depth = par->bits_per_raw_sample;
1317 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1320 bit_depth = par->bits_per_coded_sample;
1322 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1323 end_ebml_master(pb, subinfo);
1326 case AVMEDIA_TYPE_SUBTITLE:
1328 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1329 return AVERROR(ENOSYS);
1332 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1333 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1335 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1338 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1339 return AVERROR(EINVAL);
1342 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1343 track->codecpriv_offset = avio_tell(pb);
1344 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1349 end_ebml_master(pb, track_master);
1354 static int mkv_write_tracks(AVFormatContext *s)
1356 MatroskaMuxContext *mkv = s->priv_data;
1357 AVIOContext *pb = s->pb;
1358 int i, ret, default_stream_exists = 0;
1360 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1362 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1366 for (i = 0; i < s->nb_streams; i++) {
1367 AVStream *st = s->streams[i];
1368 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1370 for (i = 0; i < s->nb_streams; i++) {
1371 AVStream *st = s->streams[i];
1372 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1373 mkv->tracks_bc, default_stream_exists);
1378 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1379 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1380 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1382 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1387 static int mkv_write_chapters(AVFormatContext *s)
1389 MatroskaMuxContext *mkv = s->priv_data;
1390 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1391 ebml_master editionentry;
1392 AVRational scale = {1, 1E9};
1395 if (!s->nb_chapters || mkv->wrote_chapters)
1398 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1400 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1401 if (ret < 0) return ret;
1403 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1404 if (mkv->mode != MODE_WEBM) {
1405 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1407 for (i = 0; i < s->nb_chapters; i++) {
1408 ebml_master chapteratom, chapterdisplay;
1409 AVChapter *c = s->chapters[i];
1410 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1411 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1412 AVDictionaryEntry *t = NULL;
1413 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1414 av_log(s, AV_LOG_ERROR,
1415 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1416 chapterstart, chapterend);
1417 return AVERROR_INVALIDDATA;
1420 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1421 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1422 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1423 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1424 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1425 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1426 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1427 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1428 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1429 end_ebml_master(dyn_cp, chapterdisplay);
1431 end_ebml_master(dyn_cp, chapteratom);
1433 end_ebml_master(dyn_cp, editionentry);
1434 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1436 mkv->wrote_chapters = 1;
1440 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1442 uint8_t *key = av_strdup(t->key);
1444 const uint8_t *lang = NULL;
1448 return AVERROR(ENOMEM);
1450 if ((p = strrchr(p, '-')) &&
1451 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1458 else if (*p >= 'a' && *p <= 'z')
1463 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1464 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1466 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1467 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1468 end_ebml_master(pb, tag);
1474 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1475 uint64_t uid, ebml_master *tag)
1478 MatroskaMuxContext *mkv = s->priv_data;
1479 ebml_master targets;
1482 if (!mkv->tags_bc) {
1483 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1485 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1491 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1492 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1494 put_ebml_uid(pb, elementid, uid);
1495 end_ebml_master(pb, targets);
1499 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1501 return av_strcasecmp(name, "title") &&
1502 av_strcasecmp(name, "stereo_mode") &&
1503 av_strcasecmp(name, "creation_time") &&
1504 av_strcasecmp(name, "encoding_tool") &&
1505 av_strcasecmp(name, "duration") &&
1506 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1507 av_strcasecmp(name, "language")) &&
1508 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1509 (av_strcasecmp(name, "filename") &&
1510 av_strcasecmp(name, "mimetype")));
1513 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1514 uint64_t uid, ebml_master *tag)
1516 MatroskaMuxContext *mkv = s->priv_data;
1519 AVDictionaryEntry *t = NULL;
1521 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1525 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1526 if (mkv_check_tag_name(t->key, elementid)) {
1527 ret = mkv_write_simpletag(mkv->tags_bc, t);
1534 end_ebml_master(mkv->tags_bc, tag2);
1539 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1541 AVDictionaryEntry *t = NULL;
1543 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1544 if (mkv_check_tag_name(t->key, elementid))
1550 static int mkv_write_tags(AVFormatContext *s)
1552 MatroskaMuxContext *mkv = s->priv_data;
1553 ebml_master tag, *tagp;
1556 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1558 if (mkv_check_tag(s->metadata, 0)) {
1559 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1560 if (ret < 0) return ret;
1563 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1564 for (i = 0; i < s->nb_streams; i++) {
1565 AVStream *st = s->streams[i];
1566 mkv_track *track = &mkv->tracks[i];
1568 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1571 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1574 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1576 if (ret < 0) return ret;
1579 AVIOContext *pb = mkv->tags_bc;
1580 ebml_master simpletag;
1582 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1583 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1584 mkv->tracks[i].duration_offset = avio_tell(pb);
1586 // Reserve space to write duration as a 20-byte string.
1587 // 2 (ebml id) + 1 (data size) + 20 (data)
1588 put_ebml_void(pb, 23);
1589 end_ebml_master(pb, simpletag);
1590 end_ebml_master(pb, tag);
1594 if (mkv->mode != MODE_WEBM) {
1595 for (i = 0; i < s->nb_chapters; i++) {
1596 AVChapter *ch = s->chapters[i];
1598 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1601 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1602 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1609 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1610 for (i = 0; i < s->nb_streams; i++) {
1611 mkv_track *track = &mkv->tracks[i];
1612 AVStream *st = s->streams[i];
1614 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1617 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1620 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1628 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1629 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1630 MATROSKA_ID_TAGS, &mkv->tags_pos);
1632 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1637 static int mkv_write_attachments(AVFormatContext *s)
1639 MatroskaMuxContext *mkv = s->priv_data;
1640 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1643 if (!mkv->have_attachments)
1646 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1648 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1649 if (ret < 0) return ret;
1651 for (i = 0; i < s->nb_streams; i++) {
1652 AVStream *st = s->streams[i];
1653 mkv_track *track = &mkv->tracks[i];
1654 ebml_master attached_file;
1655 AVDictionaryEntry *t;
1656 const char *mimetype = NULL;
1658 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1661 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1663 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1664 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1665 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1666 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1667 return AVERROR(EINVAL);
1669 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1670 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1671 mimetype = t->value;
1672 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1673 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1674 if (desc && desc->mime_types) {
1675 mimetype = desc->mime_types[0];
1676 } else if (st->codecpar->codec_id = AV_CODEC_ID_TEXT)
1677 mimetype = "text/plain";
1680 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1681 "it cannot be deduced from the codec id.\n", i);
1682 return AVERROR(EINVAL);
1685 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1686 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1687 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1688 end_ebml_master(dyn_cp, attached_file);
1690 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1695 static int64_t get_metadata_duration(AVFormatContext *s)
1701 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1702 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1703 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1707 for (i = 0; i < s->nb_streams; i++) {
1709 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1711 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1712 max = FFMAX(max, us);
1715 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1719 static int mkv_write_header(AVFormatContext *s)
1721 MatroskaMuxContext *mkv = s->priv_data;
1722 AVIOContext *pb = s->pb;
1723 ebml_master ebml_header;
1724 AVDictionaryEntry *tag;
1725 int ret, i, version = 2;
1726 int64_t creation_time;
1728 if (!strcmp(s->oformat->name, "webm")) {
1729 mkv->mode = MODE_WEBM;
1732 mkv->mode = MODE_MATROSKAv2;
1734 if (mkv->mode != MODE_WEBM ||
1735 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1736 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1739 for (i = 0; i < s->nb_streams; i++) {
1740 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1741 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1742 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1746 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1747 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1748 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1749 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1750 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1751 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1752 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1753 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1754 end_ebml_master(pb, ebml_header);
1756 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1757 mkv->segment_offset = avio_tell(pb);
1759 // we write a seek head at the beginning to point to all other level
1760 // one elements (except Clusters).
1761 mkv_start_seekhead(mkv, pb);
1763 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1765 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1770 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1771 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1772 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1773 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1774 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1775 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1776 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1778 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1780 if (mkv->mode != MODE_WEBM) {
1781 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1784 const char *ident = "Lavf";
1785 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1786 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1789 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1790 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1791 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1792 uint8_t date_utc_buf[8];
1793 AV_WB64(date_utc_buf, date_utc);
1794 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1797 // reserve space for the duration
1799 mkv->duration_offset = avio_tell(pb);
1800 if (!mkv->is_live) {
1801 int64_t metadata_duration = get_metadata_duration(s);
1803 if (s->duration > 0) {
1804 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1805 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1806 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1807 } else if (metadata_duration > 0) {
1808 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1809 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1810 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1812 put_ebml_void(pb, 11); // assumes double-precision float to be written
1815 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1816 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1817 MATROSKA_ID_INFO, &mkv->info_pos);
1819 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1822 ret = mkv_write_tracks(s);
1826 for (i = 0; i < s->nb_chapters; i++)
1827 if (!s->chapters[i]->id) {
1828 mkv->chapter_id_offset = 1;
1832 ret = mkv_write_chapters(s);
1836 if (mkv->mode != MODE_WEBM) {
1837 ret = mkv_write_attachments(s);
1842 ret = mkv_write_tags(s);
1846 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1847 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1852 if (s->metadata_header_padding > 0) {
1853 if (s->metadata_header_padding == 1)
1854 s->metadata_header_padding++;
1855 put_ebml_void(pb, s->metadata_header_padding);
1858 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1859 mkv->cues_pos = avio_tell(pb);
1860 if (mkv->reserve_cues_space == 1)
1861 mkv->reserve_cues_space++;
1862 put_ebml_void(pb, mkv->reserve_cues_space);
1865 av_init_packet(&mkv->cur_audio_pkt);
1866 mkv->cur_audio_pkt.size = 0;
1867 mkv->cluster_pos = -1;
1869 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1870 // after 4k and on a keyframe
1871 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1872 if (mkv->cluster_time_limit < 0)
1873 mkv->cluster_time_limit = 5000;
1874 if (mkv->cluster_size_limit < 0)
1875 mkv->cluster_size_limit = 5 * 1024 * 1024;
1877 if (mkv->cluster_time_limit < 0)
1878 mkv->cluster_time_limit = 1000;
1879 if (mkv->cluster_size_limit < 0)
1880 mkv->cluster_size_limit = 32 * 1024;
1886 static int mkv_blockgroup_size(int pkt_size)
1888 int size = pkt_size + 4;
1889 size += ebml_length_size(size);
1890 size += 2; // EBML ID for block and block duration
1891 size += 9; // max size of block duration incl. length field
1895 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1902 dst = av_malloc(srclen);
1904 return AVERROR(ENOMEM);
1906 while (srclen >= WV_HEADER_SIZE) {
1909 ret = ff_wv_parse_header(&header, src);
1912 src += WV_HEADER_SIZE;
1913 srclen -= WV_HEADER_SIZE;
1915 if (srclen < header.blocksize) {
1916 ret = AVERROR_INVALIDDATA;
1920 if (header.initial) {
1921 AV_WL32(dst + offset, header.samples);
1924 AV_WL32(dst + offset, header.flags);
1925 AV_WL32(dst + offset + 4, header.crc);
1928 if (!(header.initial && header.final)) {
1929 AV_WL32(dst + offset, header.blocksize);
1933 memcpy(dst + offset, src, header.blocksize);
1934 src += header.blocksize;
1935 srclen -= header.blocksize;
1936 offset += header.blocksize;
1948 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1949 uint32_t blockid, AVPacket *pkt, int keyframe)
1951 MatroskaMuxContext *mkv = s->priv_data;
1952 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1953 mkv_track *track = &mkv->tracks[pkt->stream_index];
1954 uint8_t *data = NULL, *side_data = NULL;
1955 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1956 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1957 uint64_t additional_id;
1958 int64_t discard_padding = 0;
1959 unsigned track_number = track->track_num;
1960 ebml_master block_group, block_additions, block_more;
1962 ts += track->ts_offset;
1964 /* The following string is identical to the one in mkv_write_vtt_blocks
1965 * so that only one copy needs to exist in binaries. */
1966 av_log(s, AV_LOG_DEBUG,
1967 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1968 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1969 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
1970 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1971 mkv->cluster_pos, track_number, keyframe != 0);
1973 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1974 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1975 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1976 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1977 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1978 /* extradata is Annex B, assume the bitstream is too and convert it */
1979 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1980 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1981 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1982 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1983 err = mkv_strip_wavpack(pkt->data, &data, &size);
1988 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
1989 "a packet from stream %d.\n", pkt->stream_index);
1993 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1994 /* Matroska specification requires to remove the first QuickTime atom
2000 side_data = av_packet_get_side_data(pkt,
2001 AV_PKT_DATA_SKIP_SAMPLES,
2003 if (side_data && side_data_size >= 10) {
2004 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2005 (AVRational){1, par->sample_rate},
2006 (AVRational){1, 1000000000});
2009 side_data = av_packet_get_side_data(pkt,
2010 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2013 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2014 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2018 side_data_size -= 8;
2022 if (side_data_size || discard_padding) {
2023 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2024 blockid = MATROSKA_ID_BLOCK;
2027 put_ebml_id(pb, blockid);
2028 put_ebml_length(pb, size + 4, 0);
2029 // this assumes stream_index is less than 126
2030 avio_w8(pb, 0x80 | track_number);
2031 avio_wb16(pb, ts - mkv->cluster_pts);
2032 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2033 avio_write(pb, data + offset, size);
2034 if (data != pkt->data)
2037 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2038 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2040 track->last_timestamp = ts;
2042 if (discard_padding) {
2043 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2046 if (side_data_size) {
2047 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2048 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2049 /* Until dbc50f8a our demuxer used a wrong default value
2050 * of BlockAddID, so we write it unconditionally. */
2051 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2052 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2053 side_data, side_data_size);
2054 end_ebml_master(pb, block_more);
2055 end_ebml_master(pb, block_additions);
2057 if (side_data_size || discard_padding) {
2058 end_ebml_master(pb, block_group);
2064 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2066 MatroskaMuxContext *mkv = s->priv_data;
2067 mkv_track *track = &mkv->tracks[pkt->stream_index];
2068 ebml_master blockgroup;
2069 int id_size, settings_size, size;
2070 uint8_t *id, *settings;
2071 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2072 const int flags = 0;
2075 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2079 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2082 size = id_size + 1 + settings_size + 1 + pkt->size;
2084 /* The following string is identical to the one in mkv_write_block so that
2085 * only one copy needs to exist in binaries. */
2086 av_log(s, AV_LOG_DEBUG,
2087 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2088 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2089 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2090 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2091 mkv->cluster_pos, track->track_num, 1);
2093 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2095 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2096 put_ebml_length(pb, size + 4, 0);
2097 avio_w8(pb, 0x80 | track->track_num); // this assumes track_num is less than 126
2098 avio_wb16(pb, ts - mkv->cluster_pts);
2100 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2102 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2103 end_ebml_master(pb, blockgroup);
2105 return pkt->duration;
2108 static void mkv_end_cluster(AVFormatContext *s)
2110 MatroskaMuxContext *mkv = s->priv_data;
2112 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2113 mkv->cluster_pos = -1;
2114 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2117 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2119 MatroskaMuxContext *mkv = s->priv_data;
2120 mkv_track *track = &mkv->tracks[pkt->stream_index];
2121 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2123 int side_data_size = 0, ret;
2125 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2128 switch (par->codec_id) {
2129 case AV_CODEC_ID_AAC:
2130 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2131 int filler, output_sample_rate = 0;
2132 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2133 &output_sample_rate);
2136 if (!output_sample_rate)
2137 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2138 ret = ff_alloc_extradata(par, side_data_size);
2141 memcpy(par->extradata, side_data, side_data_size);
2142 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2143 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2144 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2146 put_ebml_void(mkv->tracks_bc, filler);
2147 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2148 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2149 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2150 } else if (!par->extradata_size && !track->sample_rate) {
2151 // No extradata (codecpar or packet side data).
2152 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2153 return AVERROR(EINVAL);
2156 case AV_CODEC_ID_FLAC:
2157 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2158 AVCodecParameters *codecpriv_par;
2159 if (side_data_size != par->extradata_size) {
2160 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2162 return AVERROR(EINVAL);
2164 codecpriv_par = avcodec_parameters_alloc();
2166 return AVERROR(ENOMEM);
2167 ret = avcodec_parameters_copy(codecpriv_par, par);
2169 avcodec_parameters_free(&codecpriv_par);
2172 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2173 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2174 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2175 avcodec_parameters_free(&codecpriv_par);
2178 // FIXME: Remove the following once libaom starts propagating extradata during init()
2179 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2180 case AV_CODEC_ID_AV1:
2181 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2182 !par->extradata_size) {
2183 AVIOContext *dyn_cp;
2186 ret = avio_open_dyn_buf(&dyn_cp);
2189 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2190 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2191 if (!codecpriv_size) {
2193 return AVERROR_INVALIDDATA;
2195 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2196 // Do not write the OBUs as we don't have space saved for them
2197 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2199 ret = ff_alloc_extradata(par, side_data_size);
2202 memcpy(par->extradata, side_data, side_data_size);
2203 } else if (!par->extradata_size)
2204 return AVERROR_INVALIDDATA;
2208 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2215 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2217 MatroskaMuxContext *mkv = s->priv_data;
2219 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2220 mkv_track *track = &mkv->tracks[pkt->stream_index];
2221 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2222 int duration = pkt->duration;
2224 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2225 int64_t relative_packet_pos;
2227 if (ts == AV_NOPTS_VALUE) {
2228 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2229 return AVERROR(EINVAL);
2231 ts += track->ts_offset;
2233 if (mkv->cluster_pos != -1) {
2234 int64_t cluster_time = ts - mkv->cluster_pts;
2235 if ((int16_t)cluster_time != cluster_time) {
2237 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2241 if (mkv->cluster_pos == -1) {
2242 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2245 mkv->cluster_pos = avio_tell(s->pb);
2246 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2247 mkv->cluster_pts = FFMAX(0, ts);
2248 av_log(s, AV_LOG_DEBUG,
2249 "Starting new cluster with timestamp "
2250 "%" PRId64 " at offset %" PRId64 " bytes\n",
2251 mkv->cluster_pts, mkv->cluster_pos);
2253 pb = mkv->cluster_bc;
2255 relative_packet_pos = avio_tell(pb);
2257 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2258 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2261 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2262 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2263 mkv->cluster_pos, relative_packet_pos, -1);
2264 if (ret < 0) return ret;
2267 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2268 duration = mkv_write_vtt_blocks(s, pb, pkt);
2270 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2271 mkv_blockgroup_size(pkt->size));
2273 #if FF_API_CONVERGENCE_DURATION
2274 FF_DISABLE_DEPRECATION_WARNINGS
2275 /* For backward compatibility, prefer convergence_duration. */
2276 if (pkt->convergence_duration > 0) {
2277 duration = pkt->convergence_duration;
2279 FF_ENABLE_DEPRECATION_WARNINGS
2281 /* All subtitle blocks are considered to be keyframes. */
2282 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2283 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2284 end_ebml_master(pb, blockgroup);
2287 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2288 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2289 mkv->cluster_pos, relative_packet_pos, duration);
2295 mkv->duration = FFMAX(mkv->duration, ts + duration);
2296 track->duration = FFMAX(track->duration, ts + duration);
2301 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2303 MatroskaMuxContext *mkv = s->priv_data;
2304 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2305 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2307 int64_t cluster_time;
2309 int start_new_cluster;
2311 ret = mkv_check_new_extra_data(s, pkt);
2315 if (mkv->tracks[pkt->stream_index].write_dts)
2316 cluster_time = pkt->dts - mkv->cluster_pts;
2318 cluster_time = pkt->pts - mkv->cluster_pts;
2319 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2321 cluster_size = avio_tell(mkv->cluster_bc);
2323 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2324 // WebM DASH specification states that the first block of every cluster
2325 // has to be a key frame. So for DASH video, we only create a cluster
2326 // on seeing key frames.
2327 start_new_cluster = keyframe;
2328 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2329 (mkv->cluster_pos == -1 ||
2330 cluster_time > mkv->cluster_time_limit)) {
2331 // For DASH audio, we create a Cluster based on cluster_time_limit
2332 start_new_cluster = 1;
2333 } else if (!mkv->is_dash &&
2334 (cluster_size > mkv->cluster_size_limit ||
2335 cluster_time > mkv->cluster_time_limit ||
2336 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2337 cluster_size > 4 * 1024))) {
2338 start_new_cluster = 1;
2340 start_new_cluster = 0;
2343 if (mkv->cluster_pos != -1 && start_new_cluster) {
2347 if (!mkv->cluster_pos)
2348 avio_write_marker(s->pb,
2349 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2350 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2352 // check if we have an audio packet cached
2353 if (mkv->cur_audio_pkt.size > 0) {
2354 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2355 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2356 mkv->is_dash ? start_new_cluster : 0);
2357 av_packet_unref(&mkv->cur_audio_pkt);
2359 av_log(s, AV_LOG_ERROR,
2360 "Could not write cached audio packet ret:%d\n", ret);
2365 // buffer an audio packet to ensure the packet containing the video
2366 // keyframe's timecode is contained in the same cluster for WebM
2367 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2369 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2371 ret = mkv_write_packet_internal(s, pkt, 0);
2375 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2377 MatroskaMuxContext *mkv = s->priv_data;
2380 if (mkv->cluster_pos != -1) {
2382 av_log(s, AV_LOG_DEBUG,
2383 "Flushing cluster at offset %" PRIu64 " bytes\n",
2388 return mkv_write_packet(s, pkt);
2391 static int mkv_write_trailer(AVFormatContext *s)
2393 MatroskaMuxContext *mkv = s->priv_data;
2394 AVIOContext *pb = s->pb;
2397 // check if we have an audio packet cached
2398 if (mkv->cur_audio_pkt.size > 0) {
2399 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2401 av_log(s, AV_LOG_ERROR,
2402 "Could not write cached audio packet ret:%d\n", ret);
2407 if (mkv->cluster_bc) {
2408 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2409 MATROSKA_ID_CLUSTER, 0, 0);
2412 ret = mkv_write_chapters(s);
2417 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2418 int64_t endpos, ret64;
2420 endpos = avio_tell(pb);
2422 if (mkv->cues.num_entries) {
2423 AVIOContext *cues = NULL;
2425 int64_t cuespos = endpos;
2426 int length_size = 0;
2428 ret = start_ebml_master_crc32(&cues, mkv);
2432 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2433 mkv->tracks, s->nb_streams);
2435 ffio_free_dyn_buf(&cues);
2439 if (mkv->reserve_cues_space) {
2440 size = avio_tell(cues);
2441 length_size = ebml_length_size(size);
2442 size += 4 + length_size;
2443 if (mkv->reserve_cues_space < size) {
2444 av_log(s, AV_LOG_WARNING,
2445 "Insufficient space reserved for Cues: "
2446 "%d < %"PRIu64". No Cues will be output.\n",
2447 mkv->reserve_cues_space, size);
2448 mkv->reserve_cues_space = -1;
2449 ffio_free_dyn_buf(&cues);
2452 cuespos = mkv->cues_pos;
2453 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2454 ffio_free_dyn_buf(&cues);
2457 if (mkv->reserve_cues_space == size + 1) {
2458 /* There is no way to reserve a single byte because
2459 * the minimal size of an EBML Void element is 2
2460 * (1 byte ID, 1 byte length field). This problem
2461 * is solved by writing the Cues' length field on
2462 * one byte more than necessary. */
2468 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2469 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2471 if (mkv->reserve_cues_space) {
2472 if (size < mkv->reserve_cues_space)
2473 put_ebml_void(pb, mkv->reserve_cues_space - size);
2475 endpos = avio_tell(pb);
2479 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2483 // update the duration
2484 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2485 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2486 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2487 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2489 // write tracks master
2490 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2491 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2493 // update stream durations
2496 for (i = 0; i < s->nb_streams; ++i) {
2497 AVStream *st = s->streams[i];
2498 mkv_track *track = &mkv->tracks[i];
2500 if (track->duration_offset > 0) {
2501 double duration_sec = track->duration * av_q2d(st->time_base);
2502 char duration_string[20] = "";
2504 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2507 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2509 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2510 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2511 fmod(duration_sec, 60));
2513 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2517 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2518 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2521 avio_seek(pb, endpos, SEEK_SET);
2524 if (!mkv->is_live) {
2525 end_ebml_master(pb, mkv->segment);
2528 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2531 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2534 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2535 if (ff_mkv_codec_tags[i].id == codec_id)
2538 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2539 enum AVMediaType type = avcodec_get_type(codec_id);
2540 // mkv theoretically supports any video/audio through VFW/ACM
2541 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2548 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2551 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2552 if (ff_webm_codec_tags[i].id == codec_id)
2558 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2563 uid = (uint64_t)av_lfg_get(c) << 32;
2564 uid |= av_lfg_get(c);
2567 for (k = 0; k < i; k++) {
2568 if (tracks[k].uid == uid)
2576 static int mkv_init(struct AVFormatContext *s)
2578 MatroskaMuxContext *mkv = s->priv_data;
2580 unsigned nb_tracks = 0;
2583 for (i = 0; i < s->nb_streams; i++) {
2584 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2585 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2586 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2587 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2588 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2589 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2590 av_log(s, AV_LOG_ERROR,
2591 "The Matroska muxer does not yet support muxing %s\n",
2592 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2593 return AVERROR_PATCHWELCOME;
2597 if (s->avoid_negative_ts < 0) {
2598 s->avoid_negative_ts = 1;
2599 s->internal->avoid_negative_ts_use_pts = 1;
2602 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2604 return AVERROR(ENOMEM);
2607 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2608 av_lfg_init(&c, av_get_random_seed());
2610 // Calculate the SegmentUID now in order not to waste our random seed.
2611 for (i = 0; i < 4; i++)
2612 mkv->segment_uid[i] = av_lfg_get(&c);
2615 for (i = 0; i < s->nb_streams; i++) {
2616 AVStream *st = s->streams[i];
2617 mkv_track *track = &mkv->tracks[i];
2619 if (s->flags & AVFMT_FLAG_BITEXACT) {
2622 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2625 // ms precision is the de-facto standard timescale for mkv files
2626 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2628 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
2632 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2635 if (nb_tracks > MAX_TRACKS) {
2636 av_log(s, AV_LOG_ERROR,
2637 "%u > "AV_STRINGIFY(MAX_TRACKS)" tracks (excluding attachments)"
2638 " not supported for muxing in Matroska\n", nb_tracks);
2639 return AVERROR(EINVAL);
2645 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2648 AVStream *st = s->streams[pkt->stream_index];
2650 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2651 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2652 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2653 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2654 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2660 static const AVCodecTag additional_audio_tags[] = {
2661 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2662 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2663 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2664 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2665 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2666 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2667 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2668 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2669 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2670 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2671 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2672 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2673 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2676 static const AVCodecTag additional_video_tags[] = {
2677 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2678 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2679 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2680 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2683 static const AVCodecTag additional_subtitle_tags[] = {
2684 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2685 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2686 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2687 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2690 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2691 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2692 static const AVOption options[] = {
2693 { "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 },
2694 { "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 },
2695 { "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 },
2696 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2697 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2698 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2699 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2700 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2704 #if CONFIG_MATROSKA_MUXER
2705 static const AVClass matroska_class = {
2706 .class_name = "matroska muxer",
2707 .item_name = av_default_item_name,
2709 .version = LIBAVUTIL_VERSION_INT,
2712 AVOutputFormat ff_matroska_muxer = {
2714 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2715 .mime_type = "video/x-matroska",
2716 .extensions = "mkv",
2717 .priv_data_size = sizeof(MatroskaMuxContext),
2718 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2719 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2720 .video_codec = CONFIG_LIBX264_ENCODER ?
2721 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2723 .deinit = mkv_deinit,
2724 .write_header = mkv_write_header,
2725 .write_packet = mkv_write_flush_packet,
2726 .write_trailer = mkv_write_trailer,
2727 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2728 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2729 .codec_tag = (const AVCodecTag* const []){
2730 ff_codec_bmp_tags, ff_codec_wav_tags,
2731 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2733 .subtitle_codec = AV_CODEC_ID_ASS,
2734 .query_codec = mkv_query_codec,
2735 .check_bitstream = mkv_check_bitstream,
2736 .priv_class = &matroska_class,
2740 #if CONFIG_WEBM_MUXER
2741 static const AVClass webm_class = {
2742 .class_name = "webm muxer",
2743 .item_name = av_default_item_name,
2745 .version = LIBAVUTIL_VERSION_INT,
2748 AVOutputFormat ff_webm_muxer = {
2750 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2751 .mime_type = "video/webm",
2752 .extensions = "webm",
2753 .priv_data_size = sizeof(MatroskaMuxContext),
2754 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2755 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2756 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2758 .deinit = mkv_deinit,
2759 .write_header = mkv_write_header,
2760 .write_packet = mkv_write_flush_packet,
2761 .write_trailer = mkv_write_trailer,
2762 .query_codec = webm_query_codec,
2763 .check_bitstream = mkv_check_bitstream,
2764 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2765 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2766 .priv_class = &webm_class,
2770 #if CONFIG_MATROSKA_AUDIO_MUXER
2771 static const AVClass mka_class = {
2772 .class_name = "matroska audio muxer",
2773 .item_name = av_default_item_name,
2775 .version = LIBAVUTIL_VERSION_INT,
2777 AVOutputFormat ff_matroska_audio_muxer = {
2779 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2780 .mime_type = "audio/x-matroska",
2781 .extensions = "mka",
2782 .priv_data_size = sizeof(MatroskaMuxContext),
2783 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2784 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2785 .video_codec = AV_CODEC_ID_NONE,
2787 .deinit = mkv_deinit,
2788 .write_header = mkv_write_header,
2789 .write_packet = mkv_write_flush_packet,
2790 .write_trailer = mkv_write_trailer,
2791 .check_bitstream = mkv_check_bitstream,
2792 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2794 .codec_tag = (const AVCodecTag* const []){
2795 ff_codec_wav_tags, additional_audio_tags, 0
2797 .priv_class = &mka_class,