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
63 DEFAULT_MODE_INFER_NO_SUBS,
64 DEFAULT_MODE_PASSTHROUGH,
67 typedef struct ebml_master {
68 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
69 int sizebytes; ///< how many bytes were reserved for the size
72 typedef struct mkv_seekhead_entry {
77 typedef struct mkv_seekhead {
79 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
84 typedef struct mkv_cuepoint {
87 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
88 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
89 int64_t duration; ///< duration of the block according to time base
92 typedef struct mkv_cues {
93 mkv_cuepoint *entries;
97 typedef struct mkv_track {
104 int64_t sample_rate_offset;
105 int64_t last_timestamp;
107 int64_t duration_offset;
108 int64_t codecpriv_offset;
112 #define MODE_MATROSKAv2 0x01
113 #define MODE_WEBM 0x02
115 typedef struct MatroskaMuxContext {
116 const AVClass *class;
118 AVIOContext *tags_bc;
120 AVIOContext *info_bc;
122 AVIOContext *tracks_bc;
125 int64_t segment_offset;
126 AVIOContext *cluster_bc;
127 int64_t cluster_pos; ///< file offset of the current cluster
129 int64_t duration_offset;
131 mkv_seekhead seekhead;
135 AVPacket cur_audio_pkt;
137 unsigned nb_attachments;
140 int reserve_cues_space;
141 int cluster_size_limit;
143 int64_t cluster_time_limit;
145 int dash_track_number;
149 uint32_t chapter_id_offset;
155 uint32_t segment_uid[4];
156 } MatroskaMuxContext;
158 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
159 * 8 byte for "matroska" doctype string */
160 #define MAX_EBML_HEADER_SIZE 35
162 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
163 * offset, 4 bytes for target EBML ID */
164 #define MAX_SEEKENTRY_SIZE 21
166 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
167 #define MAX_CUETRACKPOS_SIZE 40
169 /** Seek preroll value for opus */
170 #define OPUS_SEEK_PREROLL 80000000
172 static int ebml_id_size(uint32_t id)
174 return (av_log2(id) + 7U) / 8;
177 static void put_ebml_id(AVIOContext *pb, uint32_t id)
179 int i = ebml_id_size(id);
181 avio_w8(pb, (uint8_t)(id >> (i * 8)));
185 * Write an EBML size meaning "unknown size".
187 * @param bytes The number of bytes the size should occupy (maximum: 8).
189 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
191 av_assert0(bytes <= 8);
192 avio_w8(pb, 0x1ff >> bytes);
193 ffio_fill(pb, 0xff, bytes - 1);
197 * Returns how many bytes are needed to represent a number
198 * as EBML variable length integer.
200 static int ebml_num_size(uint64_t num)
210 * Calculate how many bytes are needed to represent the length field
211 * of an EBML element whose payload has a given length.
213 static int ebml_length_size(uint64_t length)
215 return ebml_num_size(length + 1);
219 * Write a number as EBML variable length integer on `bytes` bytes.
220 * `bytes` is taken literally without checking.
222 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
224 num |= 1ULL << bytes * 7;
225 for (int i = bytes - 1; i >= 0; i--)
226 avio_w8(pb, (uint8_t)(num >> i * 8));
230 * Write a length as EBML variable length integer.
232 * @param bytes The number of bytes that need to be used to write the number.
233 * If zero, the minimal number of bytes will be used.
235 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
237 int needed_bytes = ebml_length_size(length);
239 // sizes larger than this are currently undefined in EBML
240 av_assert0(length < (1ULL << 56) - 1);
243 bytes = needed_bytes;
244 // The bytes needed to write the given size must not exceed
245 // the bytes that we ought to use.
246 av_assert0(bytes >= needed_bytes);
247 put_ebml_num(pb, length, bytes);
251 * Write a (random) UID with fixed size to make the output more deterministic
253 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
255 put_ebml_id(pb, elementid);
256 put_ebml_length(pb, 8, 0);
260 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
267 put_ebml_id(pb, elementid);
268 put_ebml_length(pb, bytes, 0);
269 for (i = bytes - 1; i >= 0; i--)
270 avio_w8(pb, (uint8_t)(val >> i * 8));
273 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
276 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
281 put_ebml_id(pb, elementid);
282 put_ebml_length(pb, bytes, 0);
283 for (i = bytes - 1; i >= 0; i--)
284 avio_w8(pb, (uint8_t)(val >> i * 8));
287 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
289 put_ebml_id(pb, elementid);
290 put_ebml_length(pb, 8, 0);
291 avio_wb64(pb, av_double2int(val));
294 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
295 const void *buf, int size)
297 put_ebml_id(pb, elementid);
298 put_ebml_length(pb, size, 0);
299 avio_write(pb, buf, size);
302 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
305 put_ebml_binary(pb, elementid, str, strlen(str));
309 * Write a void element of a given size. Useful for reserving space in
310 * the file to be written to later.
312 * @param size The number of bytes to reserve, which must be at least 2.
314 static void put_ebml_void(AVIOContext *pb, int size)
316 av_assert0(size >= 2);
318 put_ebml_id(pb, EBML_ID_VOID);
319 // we need to subtract the length needed to store the size from the
320 // size we need to reserve so 2 cases, we use 8 bytes to store the
321 // size if possible, 1 byte otherwise
324 put_ebml_length(pb, size, 0);
327 put_ebml_length(pb, size, 8);
329 ffio_fill(pb, 0, size);
332 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
333 uint64_t expectedsize)
335 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
337 put_ebml_id(pb, elementid);
338 put_ebml_size_unknown(pb, bytes);
339 return (ebml_master) { avio_tell(pb), bytes };
342 static void end_ebml_master(AVIOContext *pb, ebml_master master)
344 int64_t pos = avio_tell(pb);
346 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
348 put_ebml_length(pb, pos - master.pos, master.sizebytes);
349 avio_seek(pb, pos, SEEK_SET);
352 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
355 mkv_seekhead *seekhead = &mkv->seekhead;
357 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
359 seekhead->entries[seekhead->num_entries].elementid = elementid;
360 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
363 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
367 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
371 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
376 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
377 MatroskaMuxContext *mkv, uint32_t id,
378 int length_size, int keep_buffer,
381 uint8_t *buf, crc[4];
385 mkv_add_seekhead_entry(mkv, id, avio_tell(pb));
388 size = avio_get_dyn_buf(*dyn_cp, &buf);
389 put_ebml_length(pb, size, length_size);
390 if (mkv->write_crc) {
391 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
392 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
393 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
395 avio_write(pb, buf + skip, size - skip);
398 ffio_reset_dyn_buf(*dyn_cp);
400 ffio_free_dyn_buf(dyn_cp);
405 * Complete ebml master without destroying the buffer, allowing for later updates
407 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
408 uint32_t id, int64_t *pos)
411 int size = avio_get_dyn_buf(dyn_cp, &buf);
413 *pos = avio_tell(pb);
416 put_ebml_length(pb, size, 0);
417 avio_write(pb, buf, size);
420 static void put_xiph_size(AVIOContext *pb, int size)
422 ffio_fill(pb, 255, size / 255);
423 avio_w8(pb, size % 255);
427 * Free the members allocated in the mux context.
429 static void mkv_deinit(AVFormatContext *s)
431 MatroskaMuxContext *mkv = s->priv_data;
433 av_packet_unref(&mkv->cur_audio_pkt);
435 ffio_free_dyn_buf(&mkv->cluster_bc);
436 ffio_free_dyn_buf(&mkv->info_bc);
437 ffio_free_dyn_buf(&mkv->tracks_bc);
438 ffio_free_dyn_buf(&mkv->tags_bc);
440 av_freep(&mkv->cues.entries);
441 av_freep(&mkv->tracks);
445 * Initialize the SeekHead element to be ready to index level 1 Matroska
446 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
447 * will be reserved at the current file location.
449 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
451 mkv->seekhead.filepos = avio_tell(pb);
452 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
453 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
454 // that an EBML void element will fit afterwards
455 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
456 put_ebml_void(pb, mkv->seekhead.reserved_size);
460 * Write the SeekHead to the file at the location reserved for it
461 * and seek to destpos afterwards. When error_on_seek_failure
462 * is not set, failure to seek to the position designated for the
463 * SeekHead is not considered an error and it is presumed that
464 * destpos is the current position; failure to seek to destpos
465 * afterwards is always an error.
467 * @return 0 on success, < 0 on error.
469 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
470 int error_on_seek_failure, int64_t destpos)
472 AVIOContext *dyn_cp = NULL;
473 mkv_seekhead *seekhead = &mkv->seekhead;
474 int64_t remaining, ret64;
477 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
478 return error_on_seek_failure ? ret64 : 0;
480 ret = start_ebml_master_crc32(&dyn_cp, mkv);
484 for (i = 0; i < seekhead->num_entries; i++) {
485 mkv_seekhead_entry *entry = &seekhead->entries[i];
486 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
489 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
490 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
491 put_ebml_id(dyn_cp, entry->elementid);
493 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
494 end_ebml_master(dyn_cp, seekentry);
496 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0, 0);
498 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
499 put_ebml_void(pb, remaining);
501 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
507 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
508 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
510 mkv_cues *cues = &mkv->cues;
511 mkv_cuepoint *entries = cues->entries;
516 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
518 return AVERROR(ENOMEM);
519 cues->entries = entries;
521 cues->entries[cues->num_entries].pts = ts;
522 cues->entries[cues->num_entries].stream_idx = stream;
523 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
524 cues->entries[cues->num_entries].relative_pos = relative_pos;
525 cues->entries[cues->num_entries++].duration = duration;
530 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
531 mkv_cues *cues, mkv_track *tracks, int num_tracks)
533 AVIOContext *cuepoint;
536 ret = avio_open_dyn_buf(&cuepoint);
540 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
542 uint64_t pts = entry->pts;
546 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
548 // put all the entries from different tracks that have the exact same
549 // timestamp into the same CuePoint
550 for (int j = 0; j < num_tracks; j++)
551 tracks[j].has_cue = 0;
553 ebml_master track_positions;
554 int idx = entry->stream_idx;
556 av_assert0(idx >= 0 && idx < num_tracks);
557 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
559 tracks[idx].has_cue = 1;
560 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
561 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
562 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
563 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
564 if (entry->duration != -1)
565 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
566 end_ebml_master(cuepoint, track_positions);
567 } while (++entry < end && entry->pts == pts);
568 size = avio_get_dyn_buf(cuepoint, &buf);
569 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
570 ffio_reset_dyn_buf(cuepoint);
572 ffio_free_dyn_buf(&cuepoint);
577 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb,
578 const AVCodecParameters *par)
580 const uint8_t *header_start[3];
582 int first_header_size;
585 if (par->codec_id == AV_CODEC_ID_VORBIS)
586 first_header_size = 30;
588 first_header_size = 42;
590 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
591 first_header_size, header_start, header_len) < 0) {
592 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
596 avio_w8(pb, 2); // number packets - 1
597 for (j = 0; j < 2; j++) {
598 put_xiph_size(pb, header_len[j]);
600 for (j = 0; j < 3; j++)
601 avio_write(pb, header_start[j], header_len[j]);
606 static int put_wv_codecpriv(AVIOContext *pb, const AVCodecParameters *par)
608 if (par->extradata && par->extradata_size == 2)
609 avio_write(pb, par->extradata, 2);
611 avio_wl16(pb, 0x410); // fallback to the most recent version
615 static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb,
616 const AVCodecParameters *par)
618 int write_comment = (par->channel_layout &&
619 !(par->channel_layout & ~0x3ffffULL) &&
620 !ff_flac_is_native_layout(par->channel_layout));
621 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
628 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
629 "Lavf" : LIBAVFORMAT_IDENT;
630 AVDictionary *dict = NULL;
634 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
635 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
637 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
638 av_assert1(len < (1 << 24) - 4);
643 ff_vorbiscomment_write(pb, dict, vendor, NULL, 0);
651 static int get_aac_sample_rates(AVFormatContext *s, const uint8_t *extradata,
652 int extradata_size, int *sample_rate,
653 int *output_sample_rate)
655 MPEG4AudioConfig mp4ac;
658 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
659 /* Don't abort if the failure is because of missing extradata. Assume in that
660 * case a bitstream filter will provide the muxer with the extradata in the
662 * Abort however if s->pb is not seekable, as we would not be able to seek back
663 * to write the sample rate elements once the extradata shows up, anyway. */
664 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
665 av_log(s, AV_LOG_ERROR,
666 "Error parsing AAC extradata, unable to determine samplerate.\n");
667 return AVERROR(EINVAL);
671 /* This will only happen when this function is called while writing the
672 * header and no extradata is available. The space for this element has
673 * to be reserved for when this function is called again after the
674 * extradata shows up in the first packet, as there's no way to know if
675 * output_sample_rate will be different than sample_rate or not. */
676 *output_sample_rate = *sample_rate;
678 *sample_rate = mp4ac.sample_rate;
679 *output_sample_rate = mp4ac.ext_sample_rate;
684 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
685 const AVCodecParameters *par,
688 switch (par->codec_id) {
689 case AV_CODEC_ID_VORBIS:
690 case AV_CODEC_ID_THEORA:
691 return put_xiph_codecpriv(s, dyn_cp, par);
692 case AV_CODEC_ID_FLAC:
693 return put_flac_codecpriv(s, dyn_cp, par);
694 case AV_CODEC_ID_WAVPACK:
695 return put_wv_codecpriv(dyn_cp, par);
696 case AV_CODEC_ID_H264:
697 return ff_isom_write_avcc(dyn_cp, par->extradata,
698 par->extradata_size);
699 case AV_CODEC_ID_HEVC:
700 return ff_isom_write_hvcc(dyn_cp, par->extradata,
701 par->extradata_size, 0);
702 case AV_CODEC_ID_AV1:
703 if (par->extradata_size)
704 return ff_isom_write_av1c(dyn_cp, par->extradata,
705 par->extradata_size);
707 put_ebml_void(pb, 4 + 3);
709 case AV_CODEC_ID_ALAC:
710 if (par->extradata_size < 36) {
711 av_log(s, AV_LOG_ERROR,
712 "Invalid extradata found, ALAC expects a 36-byte "
714 return AVERROR_INVALIDDATA;
716 avio_write(dyn_cp, par->extradata + 12,
717 par->extradata_size - 12);
719 case AV_CODEC_ID_AAC:
720 if (par->extradata_size)
721 avio_write(dyn_cp, par->extradata, par->extradata_size);
723 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
726 if (par->codec_id == AV_CODEC_ID_PRORES &&
727 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
728 avio_wl32(dyn_cp, par->codec_tag);
729 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
730 avio_write(dyn_cp, par->extradata, par->extradata_size);
736 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
737 AVCodecParameters *par,
738 int native_id, int qt_id)
742 int ret, codecpriv_size;
744 ret = avio_open_dyn_buf(&dyn_cp);
749 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
750 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
753 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
755 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
756 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
759 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
760 avio_wl32(dyn_cp, par->codec_tag);
761 for(i = 0; i < 0x5a - 8; i++)
764 avio_write(dyn_cp, par->extradata, par->extradata_size);
766 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
767 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
768 avcodec_get_name(par->codec_id));
771 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
773 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
774 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
775 avcodec_get_name(par->codec_id));
776 ret = AVERROR(EINVAL);
779 ff_put_bmp_header(dyn_cp, par, 0, 0);
781 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
783 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
785 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
786 avcodec_get_name(par->codec_id));
787 ret = AVERROR(EINVAL);
790 par->codec_tag = tag;
792 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
795 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
797 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
799 ffio_free_dyn_buf(&dyn_cp);
803 static int mkv_write_video_color(AVIOContext *pb, const AVCodecParameters *par,
807 uint8_t *colorinfo_ptr;
808 int side_data_size = 0;
809 int ret, colorinfo_size;
810 const uint8_t *side_data;
812 ret = avio_open_dyn_buf(&dyn_cp);
816 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
817 par->color_trc < AVCOL_TRC_NB) {
818 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
821 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
822 par->color_space < AVCOL_SPC_NB) {
823 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
825 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
826 par->color_primaries < AVCOL_PRI_NB) {
827 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
829 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
830 par->color_range < AVCOL_RANGE_NB) {
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
833 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
834 par->chroma_location <= AVCHROMA_LOC_TOP) {
837 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
838 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
839 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
842 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
844 if (side_data_size) {
845 const AVContentLightMetadata *metadata =
846 (const AVContentLightMetadata*)side_data;
847 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
848 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
851 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
853 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
854 ebml_master meta_element = start_ebml_master(
855 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
856 const AVMasteringDisplayMetadata *metadata =
857 (const AVMasteringDisplayMetadata*)side_data;
858 if (metadata->has_primaries) {
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
860 av_q2d(metadata->display_primaries[0][0]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
862 av_q2d(metadata->display_primaries[0][1]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
864 av_q2d(metadata->display_primaries[1][0]));
865 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
866 av_q2d(metadata->display_primaries[1][1]));
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
868 av_q2d(metadata->display_primaries[2][0]));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
870 av_q2d(metadata->display_primaries[2][1]));
871 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
872 av_q2d(metadata->white_point[0]));
873 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
874 av_q2d(metadata->white_point[1]));
876 if (metadata->has_luminance) {
877 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
878 av_q2d(metadata->max_luminance));
879 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
880 av_q2d(metadata->min_luminance));
882 end_ebml_master(dyn_cp, meta_element);
885 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
886 if (colorinfo_size) {
887 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
888 avio_write(pb, colorinfo_ptr, colorinfo_size);
889 end_ebml_master(pb, colorinfo);
891 ffio_free_dyn_buf(&dyn_cp);
895 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
898 ebml_master projection;
899 int side_data_size = 0;
902 const AVSphericalMapping *spherical =
903 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
909 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
910 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
911 spherical->projection != AV_SPHERICAL_CUBEMAP) {
912 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
916 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
917 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
918 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
919 4 * (2 + 1 + 8) + (2 + 1 + 20));
921 switch (spherical->projection) {
922 case AV_SPHERICAL_EQUIRECTANGULAR:
923 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
924 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
926 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
927 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
928 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
929 AV_WB32(private, 0); // version + flags
930 AV_WB32(private + 4, spherical->bound_top);
931 AV_WB32(private + 8, spherical->bound_bottom);
932 AV_WB32(private + 12, spherical->bound_left);
933 AV_WB32(private + 16, spherical->bound_right);
934 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
937 case AV_SPHERICAL_CUBEMAP:
938 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
939 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
940 AV_WB32(private, 0); // version + flags
941 AV_WB32(private + 4, 0); // layout
942 AV_WB32(private + 8, spherical->padding);
943 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
951 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
952 (double) spherical->yaw / (1 << 16));
953 if (spherical->pitch)
954 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
955 (double) spherical->pitch / (1 << 16));
957 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
958 (double) spherical->roll / (1 << 16));
960 end_ebml_master(pb, projection);
965 static void mkv_write_field_order(AVIOContext *pb, int mode,
966 enum AVFieldOrder field_order)
968 switch (field_order) {
969 case AV_FIELD_UNKNOWN:
971 case AV_FIELD_PROGRESSIVE:
972 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
973 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
980 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
981 if (mode != MODE_WEBM) {
982 switch (field_order) {
984 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
985 MATROSKA_VIDEO_FIELDORDER_TT);
988 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
989 MATROSKA_VIDEO_FIELDORDER_BB);
992 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
993 MATROSKA_VIDEO_FIELDORDER_TB);
996 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
997 MATROSKA_VIDEO_FIELDORDER_BT);
1004 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1005 AVStream *st, int mode, int *h_width, int *h_height)
1009 const AVDictionaryEntry *tag;
1010 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1014 // convert metadata into proper side data and add it to the stream
1015 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1016 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1017 int stereo_mode = atoi(tag->value);
1019 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1020 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1025 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1026 stereo_mode != 10 && stereo_mode != 12) {
1027 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1033 // iterate to find the stereo3d side data
1034 for (i = 0; i < st->nb_side_data; i++) {
1035 AVPacketSideData sd = st->side_data[i];
1036 if (sd.type == AV_PKT_DATA_STEREO3D) {
1037 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1039 switch (stereo->type) {
1040 case AV_STEREO3D_2D:
1041 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1043 case AV_STEREO3D_SIDEBYSIDE:
1044 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1045 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1046 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1049 case AV_STEREO3D_TOPBOTTOM:
1050 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1051 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1055 case AV_STEREO3D_CHECKERBOARD:
1056 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1057 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1060 case AV_STEREO3D_LINES:
1061 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1062 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1066 case AV_STEREO3D_COLUMNS:
1067 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1068 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1072 case AV_STEREO3D_FRAMESEQUENCE:
1073 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1074 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1082 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1085 // if webm, do not write unsupported modes
1086 if ((mode == MODE_WEBM &&
1087 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1088 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1089 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1090 av_log(s, AV_LOG_ERROR,
1091 "The specified stereo mode is not valid.\n");
1092 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1093 return AVERROR(EINVAL);
1096 // write StereoMode if format is valid
1097 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1102 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1103 AVStream *st, mkv_track *track, AVIOContext *pb,
1106 AVCodecParameters *par = st->codecpar;
1107 ebml_master subinfo, track_master;
1111 int sample_rate = par->sample_rate;
1112 int output_sample_rate = 0;
1113 int display_width_div = 1;
1114 int display_height_div = 1;
1116 const AVDictionaryEntry *tag;
1118 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1121 if (par->codec_id == AV_CODEC_ID_AAC) {
1122 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1123 &output_sample_rate);
1128 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1129 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1130 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1131 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGLACING, 0); // no lacing (yet)
1133 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1134 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1135 tag = av_dict_get(st->metadata, "language", NULL, 0);
1136 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1137 tag && tag->value ? tag->value : "und");
1139 // The default value for TRACKFLAGDEFAULT is 1, so add element
1140 // if we need to clear it.
1142 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, 0);
1144 if (st->disposition & AV_DISPOSITION_FORCED)
1145 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1147 if (mkv->mode == MODE_WEBM) {
1148 const char *codec_id;
1149 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1150 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1151 if (ff_webm_codec_tags[j].id == par->codec_id) {
1152 codec_id = ff_webm_codec_tags[j].str;
1157 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1158 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1159 codec_id = "D_WEBVTT/CAPTIONS";
1160 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1161 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1162 codec_id = "D_WEBVTT/DESCRIPTIONS";
1163 native_id = MATROSKA_TRACK_TYPE_METADATA;
1164 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1165 codec_id = "D_WEBVTT/METADATA";
1166 native_id = MATROSKA_TRACK_TYPE_METADATA;
1168 codec_id = "D_WEBVTT/SUBTITLES";
1169 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1174 av_log(s, AV_LOG_ERROR,
1175 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1176 return AVERROR(EINVAL);
1179 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1181 // look for a codec ID string specific to mkv to use,
1182 // if none are found, use AVI codes
1183 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1184 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1185 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1186 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1192 if (mkv->allow_raw_vfw) {
1195 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1196 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1197 return AVERROR(EINVAL);
1202 switch (par->codec_type) {
1203 case AVMEDIA_TYPE_VIDEO:
1204 mkv->have_video = 1;
1205 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1207 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1208 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1209 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1210 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1211 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1212 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1215 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1216 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1217 par->codec_id == AV_CODEC_ID_SVQ1 ||
1218 par->codec_id == AV_CODEC_ID_SVQ3 ||
1219 par->codec_id == AV_CODEC_ID_CINEPAK))
1223 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1224 else if (!native_id) {
1225 // if there is no mkv-specific codec ID, use VFW mode
1226 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1227 track->write_dts = 1;
1228 s->internal->avoid_negative_ts_use_pts = 0;
1231 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1233 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1234 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1236 mkv_write_field_order(pb, mkv->mode, par->field_order);
1238 // check both side data and metadata for stereo information,
1239 // write the result to the bitstream if any is found
1240 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1242 &display_height_div);
1246 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1247 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1248 (par->format == AV_PIX_FMT_YUVA420P)) {
1249 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1252 // write DisplayWidth and DisplayHeight, they contain the size of
1253 // a single source view and/or the display aspect ratio
1254 if (st->sample_aspect_ratio.num) {
1255 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1256 if (d_width > INT_MAX) {
1257 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1258 return AVERROR(EINVAL);
1260 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1261 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1262 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1263 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1265 AVRational display_aspect_ratio;
1266 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1267 par->width * (int64_t)st->sample_aspect_ratio.num,
1268 par->height * (int64_t)st->sample_aspect_ratio.den,
1270 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1271 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1272 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1275 } else if (display_width_div != 1 || display_height_div != 1) {
1276 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1277 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1278 } else if (mkv->mode != MODE_WEBM)
1279 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1281 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1282 uint32_t color_space = av_le2ne32(par->codec_tag);
1283 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1285 ret = mkv_write_video_color(pb, par, st);
1288 ret = mkv_write_video_projection(s, pb, st);
1291 end_ebml_master(pb, subinfo);
1294 case AVMEDIA_TYPE_AUDIO:
1295 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1296 int64_t codecdelay = av_rescale_q(par->initial_padding,
1297 (AVRational){ 1, 48000 },
1298 (AVRational){ 1, 1000000000 });
1299 if (codecdelay < 0) {
1300 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1301 return AVERROR(EINVAL);
1303 // track->ts_offset = av_rescale_q(par->initial_padding,
1304 // (AVRational){ 1, par->sample_rate },
1307 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1309 if (par->codec_id == AV_CODEC_ID_OPUS)
1310 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1312 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1315 // no mkv-specific ID, use ACM mode
1316 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1318 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 6 + 4 * 9);
1319 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1321 track->sample_rate_offset = avio_tell(pb);
1322 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1323 if (output_sample_rate)
1324 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1326 bit_depth = av_get_bits_per_sample(par->codec_id);
1327 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1328 if (par->bits_per_raw_sample)
1329 bit_depth = par->bits_per_raw_sample;
1331 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1334 bit_depth = par->bits_per_coded_sample;
1336 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1337 end_ebml_master(pb, subinfo);
1340 case AVMEDIA_TYPE_SUBTITLE:
1342 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1343 return AVERROR(ENOSYS);
1346 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1347 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1349 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1352 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1353 return AVERROR(EINVAL);
1356 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1357 track->codecpriv_offset = avio_tell(pb);
1358 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1363 end_ebml_master(pb, track_master);
1368 static int mkv_write_tracks(AVFormatContext *s)
1370 MatroskaMuxContext *mkv = s->priv_data;
1371 AVIOContext *pb = s->pb;
1372 int i, ret, video_default_idx, audio_default_idx, subtitle_default_idx;
1374 if (mkv->nb_attachments == s->nb_streams)
1377 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1379 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1383 if (mkv->default_mode != DEFAULT_MODE_PASSTHROUGH) {
1384 int video_idx, audio_idx, subtitle_idx;
1386 video_idx = video_default_idx =
1387 audio_idx = audio_default_idx =
1388 subtitle_idx = subtitle_default_idx = -1;
1390 for (i = s->nb_streams - 1; i >= 0; i--) {
1391 AVStream *st = s->streams[i];
1393 switch (st->codecpar->codec_type) {
1394 #define CASE(type, variable) \
1395 case AVMEDIA_TYPE_ ## type: \
1396 variable ## _idx = i; \
1397 if (st->disposition & AV_DISPOSITION_DEFAULT) \
1398 variable ## _default_idx = i; \
1402 CASE(SUBTITLE, subtitle)
1407 video_default_idx = FFMAX(video_default_idx, video_idx);
1408 audio_default_idx = FFMAX(audio_default_idx, audio_idx);
1409 if (mkv->default_mode != DEFAULT_MODE_INFER_NO_SUBS)
1410 subtitle_default_idx = FFMAX(subtitle_default_idx, subtitle_idx);
1412 for (i = 0; i < s->nb_streams; i++) {
1413 AVStream *st = s->streams[i];
1414 int is_default = mkv->default_mode == DEFAULT_MODE_PASSTHROUGH ?
1415 st->disposition & AV_DISPOSITION_DEFAULT :
1416 i == video_default_idx || i == audio_default_idx ||
1417 i == subtitle_default_idx;
1418 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1419 mkv->tracks_bc, is_default);
1424 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1425 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1426 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1428 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv,
1429 MATROSKA_ID_TRACKS, 0, 0, 0);
1434 static int mkv_write_chapters(AVFormatContext *s)
1436 MatroskaMuxContext *mkv = s->priv_data;
1437 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1438 ebml_master editionentry;
1439 AVRational scale = {1, 1E9};
1442 if (!s->nb_chapters || mkv->wrote_chapters)
1445 for (i = 0; i < s->nb_chapters; i++)
1446 if (!s->chapters[i]->id) {
1447 mkv->chapter_id_offset = 1;
1451 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1455 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1456 if (mkv->mode != MODE_WEBM)
1457 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1459 for (i = 0; i < s->nb_chapters; i++) {
1460 ebml_master chapteratom, chapterdisplay;
1461 const AVChapter *c = s->chapters[i];
1462 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1463 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1464 const AVDictionaryEntry *t;
1465 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1466 av_log(s, AV_LOG_ERROR,
1467 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1468 chapterstart, chapterend);
1469 ffio_free_dyn_buf(&dyn_cp);
1470 return AVERROR_INVALIDDATA;
1473 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1474 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1475 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1476 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1477 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1478 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1479 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1480 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1481 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1482 end_ebml_master(dyn_cp, chapterdisplay);
1484 end_ebml_master(dyn_cp, chapteratom);
1486 end_ebml_master(dyn_cp, editionentry);
1487 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0, 1);
1489 mkv->wrote_chapters = 1;
1493 static int mkv_write_simpletag(AVIOContext *pb, const AVDictionaryEntry *t)
1495 uint8_t *key = av_strdup(t->key);
1497 const uint8_t *lang = NULL;
1501 return AVERROR(ENOMEM);
1503 if ((p = strrchr(p, '-')) &&
1504 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1511 else if (*p >= 'a' && *p <= 'z')
1516 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1517 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1519 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1520 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1521 end_ebml_master(pb, tag);
1527 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1528 uint64_t uid, ebml_master *tag)
1531 MatroskaMuxContext *mkv = s->priv_data;
1532 ebml_master targets;
1535 if (!mkv->tags_bc) {
1536 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1538 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1544 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1545 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1547 put_ebml_uid(pb, elementid, uid);
1548 end_ebml_master(pb, targets);
1552 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1554 return av_strcasecmp(name, "title") &&
1555 av_strcasecmp(name, "stereo_mode") &&
1556 av_strcasecmp(name, "creation_time") &&
1557 av_strcasecmp(name, "encoding_tool") &&
1558 av_strcasecmp(name, "duration") &&
1559 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1560 av_strcasecmp(name, "language")) &&
1561 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1562 (av_strcasecmp(name, "filename") &&
1563 av_strcasecmp(name, "mimetype")));
1566 static int mkv_write_tag(AVFormatContext *s, const AVDictionary *m,
1567 uint32_t elementid, uint64_t uid, ebml_master *tag)
1569 MatroskaMuxContext *mkv = s->priv_data;
1570 const AVDictionaryEntry *t = NULL;
1574 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1578 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1579 if (mkv_check_tag_name(t->key, elementid)) {
1580 ret = mkv_write_simpletag(mkv->tags_bc, t);
1587 end_ebml_master(mkv->tags_bc, tag2);
1592 static int mkv_check_tag(const AVDictionary *m, uint32_t elementid)
1594 const AVDictionaryEntry *t = NULL;
1596 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1597 if (mkv_check_tag_name(t->key, elementid))
1603 static int mkv_write_tags(AVFormatContext *s)
1605 MatroskaMuxContext *mkv = s->priv_data;
1606 ebml_master tag, *tagp;
1609 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1611 if (mkv_check_tag(s->metadata, 0)) {
1612 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1617 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1618 for (i = 0; i < s->nb_streams; i++) {
1619 const AVStream *st = s->streams[i];
1620 mkv_track *track = &mkv->tracks[i];
1622 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1625 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1628 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1634 AVIOContext *pb = mkv->tags_bc;
1635 ebml_master simpletag;
1637 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1639 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1640 track->duration_offset = avio_tell(pb);
1642 // Reserve space to write duration as a 20-byte string.
1643 // 2 (ebml id) + 1 (data size) + 20 (data)
1644 put_ebml_void(pb, 23);
1645 end_ebml_master(pb, simpletag);
1646 end_ebml_master(pb, tag);
1650 if (mkv->mode != MODE_WEBM) {
1651 for (i = 0; i < s->nb_chapters; i++) {
1652 AVChapter *ch = s->chapters[i];
1654 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1657 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1658 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1665 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1666 for (i = 0; i < s->nb_streams; i++) {
1667 const mkv_track *track = &mkv->tracks[i];
1668 const AVStream *st = s->streams[i];
1670 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1673 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1676 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1684 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1685 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1686 MATROSKA_ID_TAGS, &mkv->tags_pos);
1688 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv,
1689 MATROSKA_ID_TAGS, 0, 0, 0);
1694 static const char *get_mimetype(const AVStream *st)
1696 const AVDictionaryEntry *t;
1698 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1700 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
1701 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1702 if (desc && desc->mime_types) {
1703 return desc->mime_types[0];
1704 } else if (st->codecpar->codec_id == AV_CODEC_ID_TEXT)
1705 return "text/plain";
1711 static int mkv_write_attachments(AVFormatContext *s)
1713 MatroskaMuxContext *mkv = s->priv_data;
1714 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1717 if (!mkv->nb_attachments)
1720 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1724 for (i = 0; i < s->nb_streams; i++) {
1725 const AVStream *st = s->streams[i];
1726 mkv_track *track = &mkv->tracks[i];
1727 ebml_master attached_file;
1728 const AVDictionaryEntry *t;
1729 const char *mimetype;
1731 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1734 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1736 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1737 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1738 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1739 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1740 return AVERROR(EINVAL);
1742 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1744 mimetype = get_mimetype(st);
1745 av_assert0(mimetype);
1746 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1747 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1748 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1749 end_ebml_master(dyn_cp, attached_file);
1751 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0, 1);
1756 static int64_t get_metadata_duration(AVFormatContext *s)
1758 const AVDictionaryEntry *duration = av_dict_get(s->metadata, "DURATION",
1763 if (duration && (av_parse_time(&us, duration->value, 1) == 0) && us > 0) {
1764 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1768 for (unsigned i = 0; i < s->nb_streams; i++) {
1770 duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1772 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1773 max = FFMAX(max, us);
1776 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1780 static int mkv_write_header(AVFormatContext *s)
1782 MatroskaMuxContext *mkv = s->priv_data;
1783 AVIOContext *pb = s->pb;
1784 ebml_master ebml_header;
1785 const AVDictionaryEntry *tag;
1786 int ret, i, version = 2;
1787 int64_t creation_time;
1789 if (mkv->mode != MODE_WEBM ||
1790 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1791 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1794 for (i = 0; i < s->nb_streams; i++) {
1795 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1796 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1797 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1801 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1802 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1803 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1804 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1805 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1806 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1807 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1808 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1809 end_ebml_master(pb, ebml_header);
1811 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1812 mkv->segment_offset = avio_tell(pb);
1814 // we write a seek head at the beginning to point to all other level
1815 // one elements (except Clusters).
1816 mkv_start_seekhead(mkv, pb);
1818 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1820 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1825 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1826 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1827 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1828 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1829 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1830 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1831 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1833 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1835 if (mkv->mode != MODE_WEBM)
1836 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1838 const char *ident = "Lavf";
1839 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1840 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1843 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1844 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1845 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1846 uint8_t date_utc_buf[8];
1847 AV_WB64(date_utc_buf, date_utc);
1848 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1851 // reserve space for the duration
1853 mkv->duration_offset = avio_tell(pb);
1854 if (!mkv->is_live) {
1855 int64_t metadata_duration = get_metadata_duration(s);
1857 if (s->duration > 0) {
1858 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1859 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1860 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1861 } else if (metadata_duration > 0) {
1862 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1863 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1864 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1866 put_ebml_void(pb, 11); // assumes double-precision float to be written
1869 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1870 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1871 MATROSKA_ID_INFO, &mkv->info_pos);
1873 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv,
1874 MATROSKA_ID_INFO, 0, 0, 0);
1877 ret = mkv_write_tracks(s);
1881 ret = mkv_write_chapters(s);
1885 if (mkv->mode != MODE_WEBM) {
1886 ret = mkv_write_attachments(s);
1891 /* Must come after mkv_write_chapters() because of chapter_id_offset */
1892 ret = mkv_write_tags(s);
1896 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || mkv->is_live) {
1897 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1902 if (s->metadata_header_padding > 0) {
1903 if (s->metadata_header_padding == 1)
1904 s->metadata_header_padding++;
1905 put_ebml_void(pb, s->metadata_header_padding);
1908 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1909 mkv->cues_pos = avio_tell(pb);
1910 if (mkv->reserve_cues_space == 1)
1911 mkv->reserve_cues_space++;
1912 put_ebml_void(pb, mkv->reserve_cues_space);
1915 av_init_packet(&mkv->cur_audio_pkt);
1916 mkv->cur_audio_pkt.size = 0;
1917 mkv->cluster_pos = -1;
1919 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1920 // after 4k and on a keyframe
1921 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1922 if (mkv->cluster_time_limit < 0)
1923 mkv->cluster_time_limit = 5000;
1924 if (mkv->cluster_size_limit < 0)
1925 mkv->cluster_size_limit = 5 * 1024 * 1024;
1927 if (mkv->cluster_time_limit < 0)
1928 mkv->cluster_time_limit = 1000;
1929 if (mkv->cluster_size_limit < 0)
1930 mkv->cluster_size_limit = 32 * 1024;
1936 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1938 int size = pkt_size + track_num_size + 3;
1939 size += ebml_length_size(size);
1940 size += 2; // EBML ID for block and block duration
1941 size += 9; // max size of block duration incl. length field
1945 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1952 dst = av_malloc(srclen);
1954 return AVERROR(ENOMEM);
1956 while (srclen >= WV_HEADER_SIZE) {
1959 ret = ff_wv_parse_header(&header, src);
1962 src += WV_HEADER_SIZE;
1963 srclen -= WV_HEADER_SIZE;
1965 if (srclen < header.blocksize) {
1966 ret = AVERROR_INVALIDDATA;
1970 if (header.initial) {
1971 AV_WL32(dst + offset, header.samples);
1974 AV_WL32(dst + offset, header.flags);
1975 AV_WL32(dst + offset + 4, header.crc);
1978 if (!(header.initial && header.final)) {
1979 AV_WL32(dst + offset, header.blocksize);
1983 memcpy(dst + offset, src, header.blocksize);
1984 src += header.blocksize;
1985 srclen -= header.blocksize;
1986 offset += header.blocksize;
1998 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1999 uint32_t blockid, const AVPacket *pkt, int keyframe)
2001 MatroskaMuxContext *mkv = s->priv_data;
2002 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2003 mkv_track *track = &mkv->tracks[pkt->stream_index];
2004 uint8_t *data = NULL, *side_data = NULL;
2005 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2006 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2007 uint64_t additional_id;
2008 int64_t discard_padding = 0;
2009 unsigned track_number = track->track_num;
2010 ebml_master block_group, block_additions, block_more;
2012 ts += track->ts_offset;
2014 /* The following string is identical to the one in mkv_write_vtt_blocks
2015 * so that only one copy needs to exist in binaries. */
2016 av_log(s, AV_LOG_DEBUG,
2017 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2018 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2019 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2020 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2021 mkv->cluster_pos, track_number, keyframe != 0);
2023 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2024 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2025 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2026 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2027 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2028 /* extradata is Annex B, assume the bitstream is too and convert it */
2029 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2030 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2031 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2032 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2033 err = mkv_strip_wavpack(pkt->data, &data, &size);
2038 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2039 "a packet from stream %d.\n", pkt->stream_index);
2043 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2044 /* Matroska specification requires to remove the first QuickTime atom
2050 side_data = av_packet_get_side_data(pkt,
2051 AV_PKT_DATA_SKIP_SAMPLES,
2053 if (side_data && side_data_size >= 10) {
2054 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2055 (AVRational){1, par->sample_rate},
2056 (AVRational){1, 1000000000});
2059 side_data = av_packet_get_side_data(pkt,
2060 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2063 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2064 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2068 side_data_size -= 8;
2072 if (side_data_size || discard_padding) {
2073 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2074 blockid = MATROSKA_ID_BLOCK;
2077 put_ebml_id(pb, blockid);
2078 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2079 put_ebml_num(pb, track_number, track->track_num_size);
2080 avio_wb16(pb, ts - mkv->cluster_pts);
2081 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2082 avio_write(pb, data + offset, size);
2083 if (data != pkt->data)
2086 if (blockid == MATROSKA_ID_BLOCK && !keyframe)
2087 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2088 track->last_timestamp = ts;
2090 if (discard_padding)
2091 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2093 if (side_data_size) {
2094 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2095 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2096 /* Until dbc50f8a our demuxer used a wrong default value
2097 * of BlockAddID, so we write it unconditionally. */
2098 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2099 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2100 side_data, side_data_size);
2101 end_ebml_master(pb, block_more);
2102 end_ebml_master(pb, block_additions);
2104 if (side_data_size || discard_padding)
2105 end_ebml_master(pb, block_group);
2110 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, const AVPacket *pkt)
2112 MatroskaMuxContext *mkv = s->priv_data;
2113 mkv_track *track = &mkv->tracks[pkt->stream_index];
2114 ebml_master blockgroup;
2115 int id_size, settings_size, size;
2116 uint8_t *id, *settings;
2117 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2118 const int flags = 0;
2121 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2125 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2128 size = id_size + 1 + settings_size + 1 + pkt->size;
2130 /* The following string is identical to the one in mkv_write_block so that
2131 * only one copy needs to exist in binaries. */
2132 av_log(s, AV_LOG_DEBUG,
2133 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2134 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2135 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2136 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2137 mkv->cluster_pos, track->track_num, 1);
2139 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2140 mkv_blockgroup_size(size, track->track_num_size));
2142 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2143 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2144 put_ebml_num(pb, track->track_num, track->track_num_size);
2145 avio_wb16(pb, ts - mkv->cluster_pts);
2147 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2149 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2150 end_ebml_master(pb, blockgroup);
2152 return pkt->duration;
2155 static void mkv_end_cluster(AVFormatContext *s)
2157 MatroskaMuxContext *mkv = s->priv_data;
2159 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv,
2160 MATROSKA_ID_CLUSTER, 0, 1, 0);
2161 if (!mkv->have_video) {
2162 for (unsigned i = 0; i < s->nb_streams; i++)
2163 mkv->tracks[i].has_cue = 0;
2165 mkv->cluster_pos = -1;
2166 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2169 static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
2171 MatroskaMuxContext *mkv = s->priv_data;
2172 mkv_track *track = &mkv->tracks[pkt->stream_index];
2173 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2175 int side_data_size = 0, ret;
2177 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2180 switch (par->codec_id) {
2181 case AV_CODEC_ID_AAC:
2182 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2183 int filler, output_sample_rate = 0;
2184 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2185 &output_sample_rate);
2188 if (!output_sample_rate)
2189 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2190 ret = ff_alloc_extradata(par, side_data_size);
2193 memcpy(par->extradata, side_data, side_data_size);
2194 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2195 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2196 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2198 put_ebml_void(mkv->tracks_bc, filler);
2199 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2200 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2201 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2202 } else if (!par->extradata_size && !track->sample_rate) {
2203 // No extradata (codecpar or packet side data).
2204 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2205 return AVERROR(EINVAL);
2208 case AV_CODEC_ID_FLAC:
2209 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2210 uint8_t *old_extradata = par->extradata;
2211 if (side_data_size != par->extradata_size) {
2212 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2214 return AVERROR(EINVAL);
2216 par->extradata = side_data;
2217 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2218 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2219 par->extradata = old_extradata;
2222 // FIXME: Remove the following once libaom starts propagating extradata during init()
2223 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2224 case AV_CODEC_ID_AV1:
2225 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2226 !par->extradata_size) {
2227 AVIOContext *dyn_cp;
2230 ret = avio_open_dyn_buf(&dyn_cp);
2233 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2234 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2235 if (!codecpriv_size) {
2237 return AVERROR_INVALIDDATA;
2239 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2240 // Do not write the OBUs as we don't have space saved for them
2241 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2243 ret = ff_alloc_extradata(par, side_data_size);
2246 memcpy(par->extradata, side_data, side_data_size);
2247 } else if (!par->extradata_size)
2248 return AVERROR_INVALIDDATA;
2252 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2259 static int mkv_write_packet_internal(AVFormatContext *s, const AVPacket *pkt)
2261 MatroskaMuxContext *mkv = s->priv_data;
2263 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2264 mkv_track *track = &mkv->tracks[pkt->stream_index];
2265 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2266 int duration = pkt->duration;
2268 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2269 int64_t relative_packet_pos;
2271 if (ts == AV_NOPTS_VALUE) {
2272 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2273 return AVERROR(EINVAL);
2275 ts += track->ts_offset;
2277 if (mkv->cluster_pos != -1) {
2278 int64_t cluster_time = ts - mkv->cluster_pts;
2279 if ((int16_t)cluster_time != cluster_time) {
2281 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2285 if (mkv->cluster_pos == -1) {
2286 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2289 mkv->cluster_pos = avio_tell(s->pb);
2290 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2291 mkv->cluster_pts = FFMAX(0, ts);
2292 av_log(s, AV_LOG_DEBUG,
2293 "Starting new cluster with timestamp "
2294 "%" PRId64 " at offset %" PRId64 " bytes\n",
2295 mkv->cluster_pts, mkv->cluster_pos);
2297 pb = mkv->cluster_bc;
2299 relative_packet_pos = avio_tell(pb);
2301 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2302 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2305 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
2306 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2307 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2308 mkv->cluster_pos, relative_packet_pos, -1);
2314 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2315 duration = mkv_write_vtt_blocks(s, pb, pkt);
2317 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2318 mkv_blockgroup_size(pkt->size,
2319 track->track_num_size));
2321 #if FF_API_CONVERGENCE_DURATION
2322 FF_DISABLE_DEPRECATION_WARNINGS
2323 /* For backward compatibility, prefer convergence_duration. */
2324 if (pkt->convergence_duration > 0) {
2325 duration = pkt->convergence_duration;
2327 FF_ENABLE_DEPRECATION_WARNINGS
2329 /* All subtitle blocks are considered to be keyframes. */
2330 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2331 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2332 end_ebml_master(pb, blockgroup);
2335 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2336 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2337 mkv->cluster_pos, relative_packet_pos, duration);
2343 mkv->duration = FFMAX(mkv->duration, ts + duration);
2344 track->duration = FFMAX(track->duration, ts + duration);
2349 static int mkv_write_packet(AVFormatContext *s, const AVPacket *pkt)
2351 MatroskaMuxContext *mkv = s->priv_data;
2352 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2353 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2355 int64_t cluster_time;
2357 int start_new_cluster;
2359 ret = mkv_check_new_extra_data(s, pkt);
2363 if (mkv->cluster_pos != -1) {
2364 if (mkv->tracks[pkt->stream_index].write_dts)
2365 cluster_time = pkt->dts - mkv->cluster_pts;
2367 cluster_time = pkt->pts - mkv->cluster_pts;
2368 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2370 cluster_size = avio_tell(mkv->cluster_bc);
2372 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2373 // WebM DASH specification states that the first block of
2374 // every Cluster has to be a key frame. So for DASH video,
2375 // we only create a Cluster on seeing key frames.
2376 start_new_cluster = keyframe;
2377 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2378 cluster_time > mkv->cluster_time_limit) {
2379 // For DASH audio, we create a Cluster based on cluster_time_limit.
2380 start_new_cluster = 1;
2381 } else if (!mkv->is_dash &&
2382 (cluster_size > mkv->cluster_size_limit ||
2383 cluster_time > mkv->cluster_time_limit ||
2384 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2385 cluster_size > 4 * 1024))) {
2386 start_new_cluster = 1;
2388 start_new_cluster = 0;
2390 if (start_new_cluster)
2394 if (!mkv->cluster_pos)
2395 avio_write_marker(s->pb,
2396 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2397 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2399 // check if we have an audio packet cached
2400 if (mkv->cur_audio_pkt.size > 0) {
2401 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2402 av_packet_unref(&mkv->cur_audio_pkt);
2404 av_log(s, AV_LOG_ERROR,
2405 "Could not write cached audio packet ret:%d\n", ret);
2410 // buffer an audio packet to ensure the packet containing the video
2411 // keyframe's timecode is contained in the same cluster for WebM
2412 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2414 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2416 ret = mkv_write_packet_internal(s, pkt);
2420 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2422 MatroskaMuxContext *mkv = s->priv_data;
2425 if (mkv->cluster_pos != -1) {
2427 av_log(s, AV_LOG_DEBUG,
2428 "Flushing cluster at offset %" PRIu64 " bytes\n",
2433 return mkv_write_packet(s, pkt);
2436 static int mkv_write_trailer(AVFormatContext *s)
2438 MatroskaMuxContext *mkv = s->priv_data;
2439 AVIOContext *pb = s->pb;
2442 // check if we have an audio packet cached
2443 if (mkv->cur_audio_pkt.size > 0) {
2444 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2446 av_log(s, AV_LOG_ERROR,
2447 "Could not write cached audio packet ret:%d\n", ret);
2452 if (mkv->cluster_pos != -1) {
2453 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2454 MATROSKA_ID_CLUSTER, 0, 0, 0);
2457 ret = mkv_write_chapters(s);
2462 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2463 int64_t endpos, ret64;
2465 endpos = avio_tell(pb);
2467 if (mkv->cues.num_entries) {
2468 AVIOContext *cues = NULL;
2470 int length_size = 0;
2472 ret = start_ebml_master_crc32(&cues, mkv);
2476 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2477 mkv->tracks, s->nb_streams);
2479 ffio_free_dyn_buf(&cues);
2483 if (mkv->reserve_cues_space) {
2484 size = avio_tell(cues);
2485 length_size = ebml_length_size(size);
2486 size += 4 + length_size;
2487 if (mkv->reserve_cues_space < size) {
2488 av_log(s, AV_LOG_WARNING,
2489 "Insufficient space reserved for Cues: "
2490 "%d < %"PRIu64". No Cues will be output.\n",
2491 mkv->reserve_cues_space, size);
2492 mkv->reserve_cues_space = -1;
2493 ffio_free_dyn_buf(&cues);
2496 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2497 ffio_free_dyn_buf(&cues);
2500 if (mkv->reserve_cues_space == size + 1) {
2501 /* There is no way to reserve a single byte because
2502 * the minimal size of an EBML Void element is 2
2503 * (1 byte ID, 1 byte length field). This problem
2504 * is solved by writing the Cues' length field on
2505 * one byte more than necessary. */
2511 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2513 if (mkv->reserve_cues_space) {
2514 if (size < mkv->reserve_cues_space)
2515 put_ebml_void(pb, mkv->reserve_cues_space - size);
2517 endpos = avio_tell(pb);
2521 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2525 // update the duration
2526 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2527 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2528 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2529 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0, 0);
2531 if (mkv->tracks_bc) {
2532 // write Tracks master
2533 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2534 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv,
2535 MATROSKA_ID_TRACKS, 0, 0, 0);
2538 // update stream durations
2541 for (i = 0; i < s->nb_streams; ++i) {
2542 const AVStream *st = s->streams[i];
2543 const mkv_track *track = &mkv->tracks[i];
2545 if (track->duration_offset > 0) {
2546 double duration_sec = track->duration * av_q2d(st->time_base);
2547 char duration_string[20] = "";
2549 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2552 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2554 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2555 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2556 fmod(duration_sec, 60));
2558 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2562 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2563 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv,
2564 MATROSKA_ID_TAGS, 0, 0, 0);
2567 avio_seek(pb, endpos, SEEK_SET);
2571 end_ebml_master(pb, mkv->segment);
2573 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2576 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2579 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2580 if (ff_mkv_codec_tags[i].id == codec_id)
2583 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2584 enum AVMediaType type = avcodec_get_type(codec_id);
2585 // mkv theoretically supports any video/audio through VFW/ACM
2586 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2593 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2596 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2597 if (ff_webm_codec_tags[i].id == codec_id)
2603 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2608 uid = (uint64_t)av_lfg_get(c) << 32;
2609 uid |= av_lfg_get(c);
2612 for (k = 0; k < i; k++) {
2613 if (tracks[k].uid == uid)
2621 static int mkv_init(struct AVFormatContext *s)
2623 MatroskaMuxContext *mkv = s->priv_data;
2625 unsigned nb_tracks = 0;
2628 for (i = 0; i < s->nb_streams; i++) {
2629 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2630 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2631 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2632 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2633 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2634 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2635 av_log(s, AV_LOG_ERROR,
2636 "The Matroska muxer does not yet support muxing %s\n",
2637 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2638 return AVERROR_PATCHWELCOME;
2642 if (s->avoid_negative_ts < 0) {
2643 s->avoid_negative_ts = 1;
2644 s->internal->avoid_negative_ts_use_pts = 1;
2647 if (!strcmp(s->oformat->name, "webm")) {
2648 mkv->mode = MODE_WEBM;
2651 mkv->mode = MODE_MATROSKAv2;
2653 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2655 return AVERROR(ENOMEM);
2657 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2658 av_lfg_init(&c, av_get_random_seed());
2660 // Calculate the SegmentUID now in order not to waste our random seed.
2661 for (i = 0; i < 4; i++)
2662 mkv->segment_uid[i] = av_lfg_get(&c);
2665 for (i = 0; i < s->nb_streams; i++) {
2666 AVStream *st = s->streams[i];
2667 mkv_track *track = &mkv->tracks[i];
2669 if (s->flags & AVFMT_FLAG_BITEXACT) {
2672 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2675 // ms precision is the de-facto standard timescale for mkv files
2676 avpriv_set_pts_info(st, 64, 1, 1000);
2678 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2679 if (mkv->mode == MODE_WEBM) {
2680 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2681 "as WebM doesn't support attachments.\n", i);
2682 } else if (!get_mimetype(st)) {
2683 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype "
2684 "tag and it cannot be deduced from the codec id.\n", i);
2685 return AVERROR(EINVAL);
2687 mkv->nb_attachments++;
2692 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2693 track->track_num_size = ebml_num_size(track->track_num);
2696 if (mkv->is_dash && nb_tracks != 1)
2697 return AVERROR(EINVAL);
2702 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2705 AVStream *st = s->streams[pkt->stream_index];
2707 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2708 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2709 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2710 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2711 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2717 static const AVCodecTag additional_audio_tags[] = {
2718 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2719 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2720 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2721 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2722 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2723 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2724 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2725 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2726 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2727 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2728 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2729 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2730 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2733 static const AVCodecTag additional_video_tags[] = {
2734 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2735 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2736 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2737 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2740 static const AVCodecTag additional_subtitle_tags[] = {
2741 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2742 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2743 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2744 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2747 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2748 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2749 static const AVOption options[] = {
2750 { "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 },
2751 { "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 },
2752 { "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 },
2753 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2754 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2755 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2756 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2757 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2758 { "default_mode", "Controls how a track's FlagDefault is inferred", OFFSET(default_mode), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MODE_INFER }, DEFAULT_MODE_INFER, DEFAULT_MODE_PASSTHROUGH, FLAGS, "default_mode" },
2759 { "infer", "For each track type, mark the first track of disposition default as default; if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER }, 0, 0, FLAGS, "default_mode" },
2760 { "infer_no_subs", "For each track type, mark the first track of disposition default as default; for audio and video: if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER_NO_SUBS }, 0, 0, FLAGS, "default_mode" },
2761 { "passthrough", "Use the disposition flag as-is", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_PASSTHROUGH }, 0, 0, FLAGS, "default_mode" },
2765 #if CONFIG_MATROSKA_MUXER
2766 static const AVClass matroska_class = {
2767 .class_name = "matroska muxer",
2768 .item_name = av_default_item_name,
2770 .version = LIBAVUTIL_VERSION_INT,
2773 AVOutputFormat ff_matroska_muxer = {
2775 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2776 .mime_type = "video/x-matroska",
2777 .extensions = "mkv",
2778 .priv_data_size = sizeof(MatroskaMuxContext),
2779 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2780 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2781 .video_codec = CONFIG_LIBX264_ENCODER ?
2782 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2784 .deinit = mkv_deinit,
2785 .write_header = mkv_write_header,
2786 .write_packet = mkv_write_flush_packet,
2787 .write_trailer = mkv_write_trailer,
2788 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2789 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2790 .codec_tag = (const AVCodecTag* const []){
2791 ff_codec_bmp_tags, ff_codec_wav_tags,
2792 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2794 .subtitle_codec = AV_CODEC_ID_ASS,
2795 .query_codec = mkv_query_codec,
2796 .check_bitstream = mkv_check_bitstream,
2797 .priv_class = &matroska_class,
2801 #if CONFIG_WEBM_MUXER
2802 static const AVClass webm_class = {
2803 .class_name = "webm muxer",
2804 .item_name = av_default_item_name,
2806 .version = LIBAVUTIL_VERSION_INT,
2809 AVOutputFormat ff_webm_muxer = {
2811 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2812 .mime_type = "video/webm",
2813 .extensions = "webm",
2814 .priv_data_size = sizeof(MatroskaMuxContext),
2815 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2816 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2817 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2819 .deinit = mkv_deinit,
2820 .write_header = mkv_write_header,
2821 .write_packet = mkv_write_flush_packet,
2822 .write_trailer = mkv_write_trailer,
2823 .query_codec = webm_query_codec,
2824 .check_bitstream = mkv_check_bitstream,
2825 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2826 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2827 .priv_class = &webm_class,
2831 #if CONFIG_MATROSKA_AUDIO_MUXER
2832 static const AVClass mka_class = {
2833 .class_name = "matroska audio muxer",
2834 .item_name = av_default_item_name,
2836 .version = LIBAVUTIL_VERSION_INT,
2838 AVOutputFormat ff_matroska_audio_muxer = {
2840 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2841 .mime_type = "audio/x-matroska",
2842 .extensions = "mka",
2843 .priv_data_size = sizeof(MatroskaMuxContext),
2844 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2845 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2846 .video_codec = AV_CODEC_ID_NONE,
2848 .deinit = mkv_deinit,
2849 .write_header = mkv_write_header,
2850 .write_packet = mkv_write_flush_packet,
2851 .write_trailer = mkv_write_trailer,
2852 .check_bitstream = mkv_check_bitstream,
2853 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2855 .codec_tag = (const AVCodecTag* const []){
2856 ff_codec_wav_tags, additional_audio_tags, 0
2858 .priv_class = &mka_class,