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 "subtitles.h"
36 #include "vorbiscomment.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/channel_layout.h"
41 #include "libavutil/crc.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/lfg.h"
46 #include "libavutil/mastering_display_metadata.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/random_seed.h"
51 #include "libavutil/rational.h"
52 #include "libavutil/samplefmt.h"
53 #include "libavutil/sha.h"
54 #include "libavutil/stereo3d.h"
56 #include "libavcodec/xiph.h"
57 #include "libavcodec/mpeg4audio.h"
58 #include "libavcodec/internal.h"
60 /* Level 1 elements we create a SeekHead entry for:
61 * Info, Tracks, Chapters, Attachments, Tags and Cues */
62 #define MAX_SEEKHEAD_ENTRIES 6
64 typedef struct ebml_master {
65 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
66 int sizebytes; ///< how many bytes were reserved for the size
69 typedef struct mkv_seekhead_entry {
74 typedef struct mkv_seekhead {
76 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
81 typedef struct mkv_cuepoint {
85 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
86 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
87 int64_t duration; ///< duration of the block according to time base
90 typedef struct mkv_cues {
91 mkv_cuepoint *entries;
95 typedef struct mkv_track {
99 int64_t sample_rate_offset;
100 int64_t last_timestamp;
102 int64_t duration_offset;
103 int64_t codecpriv_offset;
107 typedef struct mkv_attachment {
112 typedef struct mkv_attachments {
113 mkv_attachment *entries;
117 #define MODE_MATROSKAv2 0x01
118 #define MODE_WEBM 0x02
120 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
121 * range 1 to 126 (inclusive) */
122 #define MAX_TRACKS 126
124 typedef struct MatroskaMuxContext {
125 const AVClass *class;
127 AVIOContext *tags_bc;
129 AVIOContext *info_bc;
131 AVIOContext *tracks_bc;
134 int64_t segment_offset;
135 AVIOContext *cluster_bc;
136 int64_t cluster_pos; ///< file offset of the current cluster
138 int64_t duration_offset;
140 mkv_seekhead seekhead;
143 mkv_attachments *attachments;
145 AVPacket cur_audio_pkt;
147 int have_attachments;
150 int reserve_cues_space;
151 int cluster_size_limit;
153 int64_t cluster_time_limit;
155 int dash_track_number;
159 uint32_t chapter_id_offset;
163 } MatroskaMuxContext;
165 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
166 * 8 byte for "matroska" doctype string */
167 #define MAX_EBML_HEADER_SIZE 35
169 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
170 * offset, 4 bytes for target EBML ID */
171 #define MAX_SEEKENTRY_SIZE 21
173 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
174 #define MAX_CUETRACKPOS_SIZE 40
176 /** Seek preroll value for opus */
177 #define OPUS_SEEK_PREROLL 80000000
179 static int ebml_id_size(uint32_t id)
181 return (av_log2(id) + 7U) / 8;
184 static void put_ebml_id(AVIOContext *pb, uint32_t id)
186 int i = ebml_id_size(id);
188 avio_w8(pb, (uint8_t)(id >> (i * 8)));
192 * Write an EBML size meaning "unknown size".
194 * @param bytes The number of bytes the size should occupy (maximum: 8).
196 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
198 av_assert0(bytes <= 8);
199 avio_w8(pb, 0x1ff >> bytes);
200 ffio_fill(pb, 0xff, bytes - 1);
204 * Calculate how many bytes are needed to represent a given number in EBML.
206 static int ebml_num_size(uint64_t num)
209 while ((num + 1) >> bytes * 7)
215 * Write a number in EBML variable length format.
217 * @param bytes The number of bytes that need to be used to write the number.
218 * If zero, the minimal number of bytes will be used.
220 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
222 int i, needed_bytes = ebml_num_size(num);
224 // sizes larger than this are currently undefined in EBML
225 av_assert0(num < (1ULL << 56) - 1);
228 bytes = needed_bytes;
229 // The bytes needed to write the given size must not exceed
230 // the bytes that we ought to use.
231 av_assert0(bytes >= needed_bytes);
233 num |= 1ULL << bytes * 7;
234 for (i = bytes - 1; i >= 0; i--)
235 avio_w8(pb, (uint8_t)(num >> i * 8));
238 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, bytes, 0);
247 for (i = bytes - 1; i >= 0; i--)
248 avio_w8(pb, (uint8_t)(val >> i * 8));
251 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
254 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
256 while (tmp>>=8) bytes++;
258 put_ebml_id(pb, elementid);
259 put_ebml_num(pb, bytes, 0);
260 for (i = bytes - 1; i >= 0; i--)
261 avio_w8(pb, (uint8_t)(val >> i * 8));
264 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
266 put_ebml_id(pb, elementid);
267 put_ebml_num(pb, 8, 0);
268 avio_wb64(pb, av_double2int(val));
271 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
272 const void *buf, int size)
274 put_ebml_id(pb, elementid);
275 put_ebml_num(pb, size, 0);
276 avio_write(pb, buf, size);
279 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
282 put_ebml_binary(pb, elementid, str, strlen(str));
286 * Write a void element of a given size. Useful for reserving space in
287 * the file to be written to later.
289 * @param size The number of bytes to reserve, which must be at least 2.
291 static void put_ebml_void(AVIOContext *pb, int size)
293 av_assert0(size >= 2);
295 put_ebml_id(pb, EBML_ID_VOID);
296 // we need to subtract the length needed to store the size from the
297 // size we need to reserve so 2 cases, we use 8 bytes to store the
298 // size if possible, 1 byte otherwise
301 put_ebml_num(pb, size, 0);
304 put_ebml_num(pb, size, 8);
306 ffio_fill(pb, 0, size);
309 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
310 uint64_t expectedsize)
312 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
314 put_ebml_id(pb, elementid);
315 put_ebml_size_unknown(pb, bytes);
316 return (ebml_master) { avio_tell(pb), bytes };
319 static void end_ebml_master(AVIOContext *pb, ebml_master master)
321 int64_t pos = avio_tell(pb);
323 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
325 put_ebml_num(pb, pos - master.pos, master.sizebytes);
326 avio_seek(pb, pos, SEEK_SET);
329 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
333 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
337 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
342 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
343 MatroskaMuxContext *mkv, uint32_t id,
344 int length_size, int keep_buffer)
346 uint8_t *buf, crc[4];
350 size = avio_get_dyn_buf(*dyn_cp, &buf);
351 put_ebml_num(pb, size, length_size);
352 if (mkv->write_crc) {
353 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
354 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
355 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
357 avio_write(pb, buf + skip, size - skip);
360 ffio_reset_dyn_buf(*dyn_cp);
362 ffio_free_dyn_buf(dyn_cp);
367 * Complete ebml master without destroying the buffer, allowing for later updates
369 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
370 uint32_t id, int64_t *pos)
373 int size = avio_get_dyn_buf(dyn_cp, &buf);
375 *pos = avio_tell(pb);
378 put_ebml_num(pb, size, 0);
379 avio_write(pb, buf, size);
382 static void put_xiph_size(AVIOContext *pb, int size)
384 ffio_fill(pb, 255, size / 255);
385 avio_w8(pb, size % 255);
389 * Free the members allocated in the mux context.
391 static void mkv_deinit(AVFormatContext *s)
393 MatroskaMuxContext *mkv = s->priv_data;
395 av_packet_unref(&mkv->cur_audio_pkt);
397 ffio_free_dyn_buf(&mkv->cluster_bc);
398 ffio_free_dyn_buf(&mkv->info_bc);
399 ffio_free_dyn_buf(&mkv->tracks_bc);
400 ffio_free_dyn_buf(&mkv->tags_bc);
402 av_freep(&mkv->cues.entries);
403 if (mkv->attachments) {
404 av_freep(&mkv->attachments->entries);
405 av_freep(&mkv->attachments);
407 av_freep(&mkv->tracks);
411 * Initialize the SeekHead element to be ready to index level 1 Matroska
412 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
413 * will be reserved at the current file location.
415 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
417 mkv->seekhead.filepos = avio_tell(pb);
418 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
419 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
420 // that an EBML void element will fit afterwards
421 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
422 put_ebml_void(pb, mkv->seekhead.reserved_size);
425 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
428 mkv_seekhead *seekhead = &mkv->seekhead;
430 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
432 seekhead->entries[seekhead->num_entries].elementid = elementid;
433 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
437 * Write the SeekHead to the file at the location reserved for it
438 * and seek to destpos afterwards. When error_on_seek_failure
439 * is not set, failure to seek to the position designated for the
440 * SeekHead is not considered an error and it is presumed that
441 * destpos is the current position; failure to seek to destpos
442 * afterwards is always an error.
444 * @return 0 on success, < 0 on error.
446 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
447 int error_on_seek_failure, int64_t destpos)
449 AVIOContext *dyn_cp = NULL;
450 mkv_seekhead *seekhead = &mkv->seekhead;
451 int64_t remaining, ret64;
454 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
455 return error_on_seek_failure ? ret64 : 0;
457 ret = start_ebml_master_crc32(&dyn_cp, mkv);
461 for (i = 0; i < seekhead->num_entries; i++) {
462 mkv_seekhead_entry *entry = &seekhead->entries[i];
463 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
466 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
467 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
468 put_ebml_id(dyn_cp, entry->elementid);
470 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
471 end_ebml_master(dyn_cp, seekentry);
473 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
475 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
476 put_ebml_void(pb, remaining);
478 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
484 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
485 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
487 mkv_cues *cues = &mkv->cues;
488 mkv_cuepoint *entries = cues->entries;
493 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
495 return AVERROR(ENOMEM);
496 cues->entries = entries;
498 cues->entries[cues->num_entries].pts = ts;
499 cues->entries[cues->num_entries].stream_idx = stream;
500 cues->entries[cues->num_entries].tracknum = tracknum;
501 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
502 cues->entries[cues->num_entries].relative_pos = relative_pos;
503 cues->entries[cues->num_entries++].duration = duration;
508 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
509 mkv_cues *cues, mkv_track *tracks, int num_tracks)
511 AVIOContext *cuepoint;
514 ret = avio_open_dyn_buf(&cuepoint);
518 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
520 uint64_t pts = entry->pts;
524 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
526 // put all the entries from different tracks that have the exact same
527 // timestamp into the same CuePoint
528 for (int j = 0; j < num_tracks; j++)
529 tracks[j].has_cue = 0;
531 ebml_master track_positions;
532 int idx = entry->stream_idx;
534 av_assert0(idx >= 0 && idx < num_tracks);
535 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
537 tracks[idx].has_cue = 1;
538 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
539 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
540 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
541 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
542 if (entry->duration != -1)
543 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
544 end_ebml_master(cuepoint, track_positions);
545 } while (++entry < end && entry->pts == pts);
546 size = avio_get_dyn_buf(cuepoint, &buf);
547 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
548 ffio_reset_dyn_buf(cuepoint);
550 ffio_free_dyn_buf(&cuepoint);
555 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
557 const uint8_t *header_start[3];
559 int first_header_size;
562 if (par->codec_id == AV_CODEC_ID_VORBIS)
563 first_header_size = 30;
565 first_header_size = 42;
567 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
568 first_header_size, header_start, header_len) < 0) {
569 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
573 avio_w8(pb, 2); // number packets - 1
574 for (j = 0; j < 2; j++) {
575 put_xiph_size(pb, header_len[j]);
577 for (j = 0; j < 3; j++)
578 avio_write(pb, header_start[j], header_len[j]);
583 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
585 if (par->extradata && par->extradata_size == 2)
586 avio_write(pb, par->extradata, 2);
588 avio_wl16(pb, 0x410); // fallback to the most recent version
592 static int put_flac_codecpriv(AVFormatContext *s,
593 AVIOContext *pb, AVCodecParameters *par)
595 int write_comment = (par->channel_layout &&
596 !(par->channel_layout & ~0x3ffffULL) &&
597 !ff_flac_is_native_layout(par->channel_layout));
598 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
605 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
606 "Lavf" : LIBAVFORMAT_IDENT;
607 AVDictionary *dict = NULL;
608 uint8_t buf[32], *data, *p;
611 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
612 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
614 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
615 if (len >= ((1<<24) - 4)) {
617 return AVERROR(EINVAL);
620 data = av_malloc(len + 4);
623 return AVERROR(ENOMEM);
627 AV_WB24(data + 1, len);
630 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
632 avio_write(pb, data, len + 4);
641 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
642 int *sample_rate, int *output_sample_rate)
644 MPEG4AudioConfig mp4ac;
647 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
648 /* Don't abort if the failure is because of missing extradata. Assume in that
649 * case a bitstream filter will provide the muxer with the extradata in the
651 * Abort however if s->pb is not seekable, as we would not be able to seek back
652 * to write the sample rate elements once the extradata shows up, anyway. */
653 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
654 av_log(s, AV_LOG_ERROR,
655 "Error parsing AAC extradata, unable to determine samplerate.\n");
656 return AVERROR(EINVAL);
660 /* This will only happen when this function is called while writing the
661 * header and no extradata is available. The space for this element has
662 * to be reserved for when this function is called again after the
663 * extradata shows up in the first packet, as there's no way to know if
664 * output_sample_rate will be different than sample_rate or not. */
665 *output_sample_rate = *sample_rate;
667 *sample_rate = mp4ac.sample_rate;
668 *output_sample_rate = mp4ac.ext_sample_rate;
673 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
674 AVCodecParameters *par,
677 switch (par->codec_id) {
678 case AV_CODEC_ID_VORBIS:
679 case AV_CODEC_ID_THEORA:
680 return put_xiph_codecpriv(s, dyn_cp, par);
681 case AV_CODEC_ID_FLAC:
682 return put_flac_codecpriv(s, dyn_cp, par);
683 case AV_CODEC_ID_WAVPACK:
684 return put_wv_codecpriv(dyn_cp, par);
685 case AV_CODEC_ID_H264:
686 return ff_isom_write_avcc(dyn_cp, par->extradata,
687 par->extradata_size);
688 case AV_CODEC_ID_HEVC:
689 return ff_isom_write_hvcc(dyn_cp, par->extradata,
690 par->extradata_size, 0);
691 case AV_CODEC_ID_AV1:
692 if (par->extradata_size)
693 return ff_isom_write_av1c(dyn_cp, par->extradata,
694 par->extradata_size);
696 put_ebml_void(pb, 4 + 3);
698 case AV_CODEC_ID_ALAC:
699 if (par->extradata_size < 36) {
700 av_log(s, AV_LOG_ERROR,
701 "Invalid extradata found, ALAC expects a 36-byte "
703 return AVERROR_INVALIDDATA;
705 avio_write(dyn_cp, par->extradata + 12,
706 par->extradata_size - 12);
708 case AV_CODEC_ID_AAC:
709 if (par->extradata_size)
710 avio_write(dyn_cp, par->extradata, par->extradata_size);
712 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
715 if (par->codec_id == AV_CODEC_ID_PRORES &&
716 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
717 avio_wl32(dyn_cp, par->codec_tag);
718 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
719 avio_write(dyn_cp, par->extradata, par->extradata_size);
725 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
726 AVCodecParameters *par,
727 int native_id, int qt_id)
731 int ret, codecpriv_size;
733 ret = avio_open_dyn_buf(&dyn_cp);
738 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
739 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
742 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
744 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
745 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
748 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
749 avio_wl32(dyn_cp, par->codec_tag);
750 for(i = 0; i < 0x5a - 8; i++)
753 avio_write(dyn_cp, par->extradata, par->extradata_size);
755 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
756 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
757 avcodec_get_name(par->codec_id));
760 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
762 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
763 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
764 avcodec_get_name(par->codec_id));
765 ret = AVERROR(EINVAL);
768 ff_put_bmp_header(dyn_cp, par, 0, 0);
770 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
772 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
774 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
775 avcodec_get_name(par->codec_id));
776 ret = AVERROR(EINVAL);
779 par->codec_tag = tag;
781 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
784 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
786 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
788 ffio_free_dyn_buf(&dyn_cp);
792 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
794 uint8_t *colorinfo_ptr;
795 int side_data_size = 0;
796 int ret, colorinfo_size;
797 const uint8_t *side_data;
799 ret = avio_open_dyn_buf(&dyn_cp);
803 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
804 par->color_trc < AVCOL_TRC_NB) {
805 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
808 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
809 par->color_space < AVCOL_SPC_NB) {
810 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
812 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
813 par->color_primaries < AVCOL_PRI_NB) {
814 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
816 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
817 par->color_range < AVCOL_RANGE_NB) {
818 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
820 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
821 par->chroma_location <= AVCHROMA_LOC_TOP) {
824 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
825 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
826 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
829 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
831 if (side_data_size) {
832 const AVContentLightMetadata *metadata =
833 (const AVContentLightMetadata*)side_data;
834 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
835 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
838 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
840 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
841 ebml_master meta_element = start_ebml_master(
842 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
843 const AVMasteringDisplayMetadata *metadata =
844 (const AVMasteringDisplayMetadata*)side_data;
845 if (metadata->has_primaries) {
846 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
847 av_q2d(metadata->display_primaries[0][0]));
848 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
849 av_q2d(metadata->display_primaries[0][1]));
850 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
851 av_q2d(metadata->display_primaries[1][0]));
852 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
853 av_q2d(metadata->display_primaries[1][1]));
854 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
855 av_q2d(metadata->display_primaries[2][0]));
856 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
857 av_q2d(metadata->display_primaries[2][1]));
858 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
859 av_q2d(metadata->white_point[0]));
860 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
861 av_q2d(metadata->white_point[1]));
863 if (metadata->has_luminance) {
864 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
865 av_q2d(metadata->max_luminance));
866 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
867 av_q2d(metadata->min_luminance));
869 end_ebml_master(dyn_cp, meta_element);
872 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
873 if (colorinfo_size) {
874 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
875 avio_write(pb, colorinfo_ptr, colorinfo_size);
876 end_ebml_master(pb, colorinfo);
878 ffio_free_dyn_buf(&dyn_cp);
882 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
885 ebml_master projection;
886 int side_data_size = 0;
889 const AVSphericalMapping *spherical =
890 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
896 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
897 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
898 spherical->projection != AV_SPHERICAL_CUBEMAP) {
899 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
903 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
904 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
905 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
906 4 * (2 + 1 + 8) + (2 + 1 + 20));
908 switch (spherical->projection) {
909 case AV_SPHERICAL_EQUIRECTANGULAR:
910 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
911 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
913 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
914 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
915 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
916 AV_WB32(private, 0); // version + flags
917 AV_WB32(private + 4, spherical->bound_top);
918 AV_WB32(private + 8, spherical->bound_bottom);
919 AV_WB32(private + 12, spherical->bound_left);
920 AV_WB32(private + 16, spherical->bound_right);
921 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
924 case AV_SPHERICAL_CUBEMAP:
925 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
926 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
927 AV_WB32(private, 0); // version + flags
928 AV_WB32(private + 4, 0); // layout
929 AV_WB32(private + 8, spherical->padding);
930 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
938 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
939 (double) spherical->yaw / (1 << 16));
940 if (spherical->pitch)
941 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
942 (double) spherical->pitch / (1 << 16));
944 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
945 (double) spherical->roll / (1 << 16));
947 end_ebml_master(pb, projection);
952 static void mkv_write_field_order(AVIOContext *pb, int mode,
953 enum AVFieldOrder field_order)
955 switch (field_order) {
956 case AV_FIELD_UNKNOWN:
958 case AV_FIELD_PROGRESSIVE:
959 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
960 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
966 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
967 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
968 if (mode != MODE_WEBM) {
969 switch (field_order) {
971 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
972 MATROSKA_VIDEO_FIELDORDER_TT);
975 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
976 MATROSKA_VIDEO_FIELDORDER_BB);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
980 MATROSKA_VIDEO_FIELDORDER_TB);
983 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
984 MATROSKA_VIDEO_FIELDORDER_BT);
991 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
992 AVStream *st, int mode, int *h_width, int *h_height)
996 AVDictionaryEntry *tag;
997 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1001 // convert metadata into proper side data and add it to the stream
1002 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1003 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1004 int stereo_mode = atoi(tag->value);
1006 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1007 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1012 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1013 stereo_mode != 10 && stereo_mode != 12) {
1014 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1020 // iterate to find the stereo3d side data
1021 for (i = 0; i < st->nb_side_data; i++) {
1022 AVPacketSideData sd = st->side_data[i];
1023 if (sd.type == AV_PKT_DATA_STEREO3D) {
1024 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1026 switch (stereo->type) {
1027 case AV_STEREO3D_2D:
1028 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1030 case AV_STEREO3D_SIDEBYSIDE:
1031 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1032 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1033 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1036 case AV_STEREO3D_TOPBOTTOM:
1037 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1038 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1042 case AV_STEREO3D_CHECKERBOARD:
1043 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1044 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1047 case AV_STEREO3D_LINES:
1048 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1049 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1053 case AV_STEREO3D_COLUMNS:
1054 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1055 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1059 case AV_STEREO3D_FRAMESEQUENCE:
1060 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1061 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1069 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1072 // if webm, do not write unsupported modes
1073 if ((mode == MODE_WEBM &&
1074 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1075 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1076 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1077 av_log(s, AV_LOG_ERROR,
1078 "The specified stereo mode is not valid.\n");
1079 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1080 return AVERROR(EINVAL);
1083 // write StereoMode if format is valid
1084 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1089 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1090 int i, AVIOContext *pb, int default_stream_exists)
1092 AVStream *st = s->streams[i];
1093 AVCodecParameters *par = st->codecpar;
1094 ebml_master subinfo, track;
1098 int sample_rate = par->sample_rate;
1099 int output_sample_rate = 0;
1100 int display_width_div = 1;
1101 int display_height_div = 1;
1103 AVDictionaryEntry *tag;
1105 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1106 mkv->have_attachments = 1;
1110 if (par->codec_id == AV_CODEC_ID_AAC) {
1111 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1112 &output_sample_rate);
1117 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1118 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1119 mkv->is_dash ? mkv->dash_track_number : i + 1);
1120 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1121 mkv->is_dash ? mkv->dash_track_number : i + 1);
1122 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1124 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1125 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1126 tag = av_dict_get(st->metadata, "language", NULL, 0);
1127 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1128 tag && tag->value ? tag->value : "und");
1130 // The default value for TRACKFLAGDEFAULT is 1, so add element
1131 // if we need to clear it.
1132 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1133 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1135 if (st->disposition & AV_DISPOSITION_FORCED)
1136 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1138 if (mkv->mode == MODE_WEBM) {
1139 const char *codec_id;
1140 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1141 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1142 if (ff_webm_codec_tags[j].id == par->codec_id) {
1143 codec_id = ff_webm_codec_tags[j].str;
1148 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1149 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1150 codec_id = "D_WEBVTT/CAPTIONS";
1151 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1152 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1153 codec_id = "D_WEBVTT/DESCRIPTIONS";
1154 native_id = MATROSKA_TRACK_TYPE_METADATA;
1155 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1156 codec_id = "D_WEBVTT/METADATA";
1157 native_id = MATROSKA_TRACK_TYPE_METADATA;
1159 codec_id = "D_WEBVTT/SUBTITLES";
1160 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1165 av_log(s, AV_LOG_ERROR,
1166 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1167 return AVERROR(EINVAL);
1170 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1172 // look for a codec ID string specific to mkv to use,
1173 // if none are found, use AVI codes
1174 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1175 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1176 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1177 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1183 if (mkv->allow_raw_vfw) {
1186 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1187 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1188 return AVERROR(EINVAL);
1193 switch (par->codec_type) {
1194 case AVMEDIA_TYPE_VIDEO:
1195 mkv->have_video = 1;
1196 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1198 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1199 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1200 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1201 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1202 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1203 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1206 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1207 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1208 par->codec_id == AV_CODEC_ID_SVQ1 ||
1209 par->codec_id == AV_CODEC_ID_SVQ3 ||
1210 par->codec_id == AV_CODEC_ID_CINEPAK))
1214 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1215 else if (!native_id) {
1216 // if there is no mkv-specific codec ID, use VFW mode
1217 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1218 mkv->tracks[i].write_dts = 1;
1219 s->internal->avoid_negative_ts_use_pts = 0;
1222 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1224 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1225 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1227 mkv_write_field_order(pb, mkv->mode, par->field_order);
1229 // check both side data and metadata for stereo information,
1230 // write the result to the bitstream if any is found
1231 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1233 &display_height_div);
1237 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1238 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1239 (par->format == AV_PIX_FMT_YUVA420P)) {
1240 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1243 // write DisplayWidth and DisplayHeight, they contain the size of
1244 // a single source view and/or the display aspect ratio
1245 if (st->sample_aspect_ratio.num) {
1246 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1247 if (d_width > INT_MAX) {
1248 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1249 return AVERROR(EINVAL);
1251 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1252 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1253 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1254 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1256 AVRational display_aspect_ratio;
1257 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1258 par->width * (int64_t)st->sample_aspect_ratio.num,
1259 par->height * (int64_t)st->sample_aspect_ratio.den,
1261 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1262 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1263 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1266 } else if (display_width_div != 1 || display_height_div != 1) {
1267 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1268 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1269 } else if (mkv->mode != MODE_WEBM)
1270 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1272 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1273 uint32_t color_space = av_le2ne32(par->codec_tag);
1274 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1276 ret = mkv_write_video_color(pb, par, st);
1279 ret = mkv_write_video_projection(s, pb, st);
1282 end_ebml_master(pb, subinfo);
1285 case AVMEDIA_TYPE_AUDIO:
1286 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1287 int64_t codecdelay = av_rescale_q(par->initial_padding,
1288 (AVRational){ 1, 48000 },
1289 (AVRational){ 1, 1000000000 });
1290 if (codecdelay < 0) {
1291 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1292 return AVERROR(EINVAL);
1294 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1295 // (AVRational){ 1, par->sample_rate },
1298 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1300 if (par->codec_id == AV_CODEC_ID_OPUS)
1301 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1303 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1306 // no mkv-specific ID, use ACM mode
1307 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1309 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1310 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1312 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1313 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1314 if (output_sample_rate)
1315 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1317 bit_depth = av_get_bits_per_sample(par->codec_id);
1318 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1319 if (par->bits_per_raw_sample)
1320 bit_depth = par->bits_per_raw_sample;
1322 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1325 bit_depth = par->bits_per_coded_sample;
1327 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1328 end_ebml_master(pb, subinfo);
1331 case AVMEDIA_TYPE_SUBTITLE:
1333 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1334 return AVERROR(ENOSYS);
1337 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1338 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1340 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1343 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1344 return AVERROR(EINVAL);
1347 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1348 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1349 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1354 end_ebml_master(pb, track);
1359 static int mkv_write_tracks(AVFormatContext *s)
1361 MatroskaMuxContext *mkv = s->priv_data;
1362 AVIOContext *pb = s->pb;
1363 int i, ret, default_stream_exists = 0;
1365 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1367 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1371 for (i = 0; i < s->nb_streams; i++) {
1372 AVStream *st = s->streams[i];
1373 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1375 for (i = 0; i < s->nb_streams; i++) {
1376 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1381 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1382 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1383 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1385 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1390 static int mkv_write_chapters(AVFormatContext *s)
1392 MatroskaMuxContext *mkv = s->priv_data;
1393 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1394 ebml_master editionentry;
1395 AVRational scale = {1, 1E9};
1398 if (!s->nb_chapters || mkv->wrote_chapters)
1401 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1403 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1404 if (ret < 0) return ret;
1406 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1407 if (mkv->mode != MODE_WEBM) {
1408 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1409 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1411 for (i = 0; i < s->nb_chapters; i++) {
1412 ebml_master chapteratom, chapterdisplay;
1413 AVChapter *c = s->chapters[i];
1414 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1415 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1416 AVDictionaryEntry *t = NULL;
1417 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1418 av_log(s, AV_LOG_ERROR,
1419 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1420 chapterstart, chapterend);
1421 return AVERROR_INVALIDDATA;
1424 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1425 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1426 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1427 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1428 if (mkv->mode != MODE_WEBM) {
1429 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1430 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1432 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1433 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1434 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1435 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1436 end_ebml_master(dyn_cp, chapterdisplay);
1438 end_ebml_master(dyn_cp, chapteratom);
1440 end_ebml_master(dyn_cp, editionentry);
1441 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1443 mkv->wrote_chapters = 1;
1447 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1449 uint8_t *key = av_strdup(t->key);
1451 const uint8_t *lang = NULL;
1455 return AVERROR(ENOMEM);
1457 if ((p = strrchr(p, '-')) &&
1458 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1465 else if (*p >= 'a' && *p <= 'z')
1470 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1471 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1473 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1474 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1475 end_ebml_master(pb, tag);
1481 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1482 unsigned int uid, ebml_master *tag)
1485 MatroskaMuxContext *mkv = s->priv_data;
1486 ebml_master targets;
1489 if (!mkv->tags_bc) {
1490 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1492 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1498 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1499 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1501 put_ebml_uint(pb, elementid, uid);
1502 end_ebml_master(pb, targets);
1506 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1508 return av_strcasecmp(name, "title") &&
1509 av_strcasecmp(name, "stereo_mode") &&
1510 av_strcasecmp(name, "creation_time") &&
1511 av_strcasecmp(name, "encoding_tool") &&
1512 av_strcasecmp(name, "duration") &&
1513 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1514 av_strcasecmp(name, "language")) &&
1515 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1516 (av_strcasecmp(name, "filename") &&
1517 av_strcasecmp(name, "mimetype")));
1520 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1523 MatroskaMuxContext *mkv = s->priv_data;
1526 AVDictionaryEntry *t = NULL;
1528 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1532 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1533 if (mkv_check_tag_name(t->key, elementid)) {
1534 ret = mkv_write_simpletag(mkv->tags_bc, t);
1540 end_ebml_master(mkv->tags_bc, tag);
1544 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1546 AVDictionaryEntry *t = NULL;
1548 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1549 if (mkv_check_tag_name(t->key, elementid))
1555 static int mkv_write_tags(AVFormatContext *s)
1557 MatroskaMuxContext *mkv = s->priv_data;
1560 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1562 if (mkv_check_tag(s->metadata, 0)) {
1563 ret = mkv_write_tag(s, s->metadata, 0, 0);
1564 if (ret < 0) return ret;
1567 for (i = 0; i < s->nb_streams; i++) {
1568 AVStream *st = s->streams[i];
1570 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1573 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1576 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1577 if (ret < 0) return ret;
1580 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1581 for (i = 0; i < s->nb_streams; i++) {
1583 AVStream *st = s->streams[i];
1584 ebml_master tag_target;
1587 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1590 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1591 i + 1, &tag_target);
1596 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1597 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1598 mkv->tracks[i].duration_offset = avio_tell(pb);
1600 // Reserve space to write duration as a 20-byte string.
1601 // 2 (ebml id) + 1 (data size) + 20 (data)
1602 put_ebml_void(pb, 23);
1603 end_ebml_master(pb, tag);
1604 end_ebml_master(pb, tag_target);
1608 if (mkv->mode != MODE_WEBM) {
1609 for (i = 0; i < s->nb_chapters; i++) {
1610 AVChapter *ch = s->chapters[i];
1612 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1615 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1621 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1622 for (i = 0; i < mkv->attachments->num_entries; i++) {
1623 mkv_attachment *attachment = &mkv->attachments->entries[i];
1624 AVStream *st = s->streams[attachment->stream_idx];
1626 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1629 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1636 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1637 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1638 MATROSKA_ID_TAGS, &mkv->tags_pos);
1640 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1645 static int mkv_write_attachments(AVFormatContext *s)
1647 MatroskaMuxContext *mkv = s->priv_data;
1648 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1652 if (!mkv->have_attachments)
1655 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1656 if (!mkv->attachments)
1657 return AVERROR(ENOMEM);
1659 av_lfg_init(&c, av_get_random_seed());
1661 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1663 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1664 if (ret < 0) return ret;
1666 for (i = 0; i < s->nb_streams; i++) {
1667 AVStream *st = s->streams[i];
1668 ebml_master attached_file;
1669 mkv_attachment *attachment = mkv->attachments->entries;
1670 AVDictionaryEntry *t;
1671 const char *mimetype = NULL;
1674 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1677 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1679 return AVERROR(ENOMEM);
1680 mkv->attachments->entries = attachment;
1682 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1684 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1685 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1686 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1687 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1688 return AVERROR(EINVAL);
1690 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1691 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1692 mimetype = t->value;
1693 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1695 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1696 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1697 mimetype = ff_mkv_mime_tags[i].str;
1700 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1701 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1702 mimetype = ff_mkv_image_mime_tags[i].str;
1707 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1708 "it cannot be deduced from the codec id.\n", i);
1709 return AVERROR(EINVAL);
1712 if (s->flags & AVFMT_FLAG_BITEXACT) {
1713 struct AVSHA *sha = av_sha_alloc();
1716 return AVERROR(ENOMEM);
1717 av_sha_init(sha, 160);
1718 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1719 av_sha_final(sha, digest);
1721 fileuid = AV_RL32(digest);
1723 fileuid = av_lfg_get(&c);
1725 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1726 fileuid, mkv->attachments->num_entries);
1728 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1729 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1730 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1731 end_ebml_master(dyn_cp, attached_file);
1733 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1734 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1736 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1741 static int64_t get_metadata_duration(AVFormatContext *s)
1747 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1748 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1749 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1753 for (i = 0; i < s->nb_streams; i++) {
1755 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1757 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1758 max = FFMAX(max, us);
1761 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1765 static int mkv_write_header(AVFormatContext *s)
1767 MatroskaMuxContext *mkv = s->priv_data;
1768 AVIOContext *pb = s->pb;
1769 ebml_master ebml_header;
1770 AVDictionaryEntry *tag;
1771 int ret, i, version = 2;
1772 int64_t creation_time;
1774 if (!strcmp(s->oformat->name, "webm")) {
1775 mkv->mode = MODE_WEBM;
1778 mkv->mode = MODE_MATROSKAv2;
1780 if (mkv->mode != MODE_WEBM ||
1781 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1782 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1785 for (i = 0; i < s->nb_streams; i++) {
1786 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1787 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1788 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1792 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1794 return AVERROR(ENOMEM);
1796 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1797 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1798 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1799 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1800 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1801 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1802 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1803 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1804 end_ebml_master(pb, ebml_header);
1806 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1807 mkv->segment_offset = avio_tell(pb);
1809 // we write a seek head at the beginning to point to all other level
1810 // one elements (except Clusters).
1811 mkv_start_seekhead(mkv, pb);
1813 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1815 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1820 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1821 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1822 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1823 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1824 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1825 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1826 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1828 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1830 if (mkv->mode != MODE_WEBM) {
1831 uint32_t segment_uid[4];
1834 av_lfg_init(&lfg, av_get_random_seed());
1836 for (i = 0; i < 4; i++)
1837 segment_uid[i] = av_lfg_get(&lfg);
1839 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1842 const char *ident = "Lavf";
1843 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1844 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1847 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1848 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1849 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1850 uint8_t date_utc_buf[8];
1851 AV_WB64(date_utc_buf, date_utc);
1852 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1855 // reserve space for the duration
1857 mkv->duration_offset = avio_tell(pb);
1858 if (!mkv->is_live) {
1859 int64_t metadata_duration = get_metadata_duration(s);
1861 if (s->duration > 0) {
1862 int64_t scaledDuration = av_rescale(s->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 recording time = %" PRIu64 "\n", scaledDuration);
1865 } else if (metadata_duration > 0) {
1866 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1867 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1868 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1870 put_ebml_void(pb, 11); // assumes double-precision float to be written
1873 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1874 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1875 MATROSKA_ID_INFO, &mkv->info_pos);
1877 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1880 ret = mkv_write_tracks(s);
1884 for (i = 0; i < s->nb_chapters; i++)
1885 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1887 ret = mkv_write_chapters(s);
1891 if (mkv->mode != MODE_WEBM) {
1892 ret = mkv_write_attachments(s);
1897 ret = mkv_write_tags(s);
1901 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1902 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1907 if (s->metadata_header_padding > 0) {
1908 if (s->metadata_header_padding == 1)
1909 s->metadata_header_padding++;
1910 put_ebml_void(pb, s->metadata_header_padding);
1913 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1914 mkv->cues_pos = avio_tell(pb);
1915 if (mkv->reserve_cues_space == 1)
1916 mkv->reserve_cues_space++;
1917 put_ebml_void(pb, mkv->reserve_cues_space);
1920 av_init_packet(&mkv->cur_audio_pkt);
1921 mkv->cur_audio_pkt.size = 0;
1922 mkv->cluster_pos = -1;
1924 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1925 // after 4k and on a keyframe
1926 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1927 if (mkv->cluster_time_limit < 0)
1928 mkv->cluster_time_limit = 5000;
1929 if (mkv->cluster_size_limit < 0)
1930 mkv->cluster_size_limit = 5 * 1024 * 1024;
1932 if (mkv->cluster_time_limit < 0)
1933 mkv->cluster_time_limit = 1000;
1934 if (mkv->cluster_size_limit < 0)
1935 mkv->cluster_size_limit = 32 * 1024;
1941 static int mkv_blockgroup_size(int pkt_size)
1943 int size = pkt_size + 4;
1944 size += ebml_num_size(size);
1945 size += 2; // EBML ID for block and block duration
1946 size += 9; // max size of block duration incl. length field
1950 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1957 dst = av_malloc(srclen);
1959 return AVERROR(ENOMEM);
1961 while (srclen >= WV_HEADER_SIZE) {
1964 ret = ff_wv_parse_header(&header, src);
1967 src += WV_HEADER_SIZE;
1968 srclen -= WV_HEADER_SIZE;
1970 if (srclen < header.blocksize) {
1971 ret = AVERROR_INVALIDDATA;
1975 if (header.initial) {
1976 AV_WL32(dst + offset, header.samples);
1979 AV_WL32(dst + offset, header.flags);
1980 AV_WL32(dst + offset + 4, header.crc);
1983 if (!(header.initial && header.final)) {
1984 AV_WL32(dst + offset, header.blocksize);
1988 memcpy(dst + offset, src, header.blocksize);
1989 src += header.blocksize;
1990 srclen -= header.blocksize;
1991 offset += header.blocksize;
2003 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2004 uint32_t blockid, AVPacket *pkt, int keyframe)
2006 MatroskaMuxContext *mkv = s->priv_data;
2007 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2008 mkv_track *track = &mkv->tracks[pkt->stream_index];
2009 uint8_t *data = NULL, *side_data = NULL;
2010 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2011 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2012 uint64_t additional_id = 0;
2013 int64_t discard_padding = 0;
2014 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2015 ebml_master block_group, block_additions, block_more;
2017 ts += track->ts_offset;
2019 /* The following string is identical to the one in mkv_write_vtt_blocks
2020 * so that only one copy needs to exist in binaries. */
2021 av_log(s, AV_LOG_DEBUG,
2022 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2023 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2024 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2025 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2026 mkv->cluster_pos, track_number, keyframe != 0);
2028 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2029 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2030 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2031 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2032 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2033 /* extradata is Annex B, assume the bitstream is too and convert it */
2034 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2035 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2036 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2037 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2038 err = mkv_strip_wavpack(pkt->data, &data, &size);
2043 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2044 "a packet from stream %d.\n", pkt->stream_index);
2048 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2049 /* Matroska specification requires to remove the first QuickTime atom
2055 side_data = av_packet_get_side_data(pkt,
2056 AV_PKT_DATA_SKIP_SAMPLES,
2058 if (side_data && side_data_size >= 10) {
2059 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2060 (AVRational){1, par->sample_rate},
2061 (AVRational){1, 1000000000});
2064 side_data = av_packet_get_side_data(pkt,
2065 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2068 if (side_data_size < 8) {
2071 additional_id = AV_RB64(side_data);
2073 side_data_size -= 8;
2077 if ((side_data_size && additional_id == 1) || discard_padding) {
2078 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2079 blockid = MATROSKA_ID_BLOCK;
2082 put_ebml_id(pb, blockid);
2083 put_ebml_num(pb, size + 4, 0);
2084 // this assumes stream_index is less than 126
2085 avio_w8(pb, 0x80 | track_number);
2086 avio_wb16(pb, ts - mkv->cluster_pts);
2087 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2088 avio_write(pb, data + offset, size);
2089 if (data != pkt->data)
2092 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2093 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2095 track->last_timestamp = ts;
2097 if (discard_padding) {
2098 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2101 if (side_data_size && additional_id == 1) {
2102 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2103 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2104 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2105 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2106 put_ebml_num(pb, side_data_size, 0);
2107 avio_write(pb, side_data, side_data_size);
2108 end_ebml_master(pb, block_more);
2109 end_ebml_master(pb, block_additions);
2111 if ((side_data_size && additional_id == 1) || discard_padding) {
2112 end_ebml_master(pb, block_group);
2118 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2120 MatroskaMuxContext *mkv = s->priv_data;
2121 ebml_master blockgroup;
2122 int id_size, settings_size, size;
2123 uint8_t *id, *settings;
2124 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2125 const int flags = 0;
2128 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2132 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2135 size = id_size + 1 + settings_size + 1 + pkt->size;
2137 /* The following string is identical to the one in mkv_write_block so that
2138 * only one copy needs to exist in binaries. */
2139 av_log(s, AV_LOG_DEBUG,
2140 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2141 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2142 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2143 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2144 mkv->cluster_pos, pkt->stream_index + 1, 1);
2146 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2148 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2149 put_ebml_num(pb, size + 4, 0);
2150 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2151 avio_wb16(pb, ts - mkv->cluster_pts);
2153 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2155 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2156 end_ebml_master(pb, blockgroup);
2158 return pkt->duration;
2161 static void mkv_end_cluster(AVFormatContext *s)
2163 MatroskaMuxContext *mkv = s->priv_data;
2165 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2166 mkv->cluster_pos = -1;
2167 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2170 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2172 MatroskaMuxContext *mkv = s->priv_data;
2173 mkv_track *track = &mkv->tracks[pkt->stream_index];
2174 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2176 int side_data_size = 0, ret;
2178 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2181 switch (par->codec_id) {
2182 case AV_CODEC_ID_AAC:
2183 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2184 int filler, output_sample_rate = 0;
2185 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2186 &output_sample_rate);
2189 if (!output_sample_rate)
2190 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2191 ret = ff_alloc_extradata(par, side_data_size);
2194 memcpy(par->extradata, side_data, side_data_size);
2195 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2196 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2197 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2199 put_ebml_void(mkv->tracks_bc, filler);
2200 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2201 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2202 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2203 } else if (!par->extradata_size && !track->sample_rate) {
2204 // No extradata (codecpar or packet side data).
2205 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2206 return AVERROR(EINVAL);
2209 case AV_CODEC_ID_FLAC:
2210 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2211 AVCodecParameters *codecpriv_par;
2212 if (side_data_size != par->extradata_size) {
2213 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2215 return AVERROR(EINVAL);
2217 codecpriv_par = avcodec_parameters_alloc();
2219 return AVERROR(ENOMEM);
2220 ret = avcodec_parameters_copy(codecpriv_par, par);
2222 avcodec_parameters_free(&codecpriv_par);
2225 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2226 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2227 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2228 avcodec_parameters_free(&codecpriv_par);
2231 // FIXME: Remove the following once libaom starts propagating extradata during init()
2232 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2233 case AV_CODEC_ID_AV1:
2234 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2235 !par->extradata_size) {
2236 AVIOContext *dyn_cp;
2239 ret = avio_open_dyn_buf(&dyn_cp);
2242 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2243 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2244 if (!codecpriv_size) {
2246 return AVERROR_INVALIDDATA;
2248 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2249 // Do not write the OBUs as we don't have space saved for them
2250 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2252 ret = ff_alloc_extradata(par, side_data_size);
2255 memcpy(par->extradata, side_data, side_data_size);
2256 } else if (!par->extradata_size)
2257 return AVERROR_INVALIDDATA;
2261 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2268 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2270 MatroskaMuxContext *mkv = s->priv_data;
2272 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2273 mkv_track *track = &mkv->tracks[pkt->stream_index];
2274 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2275 int duration = pkt->duration;
2277 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2278 int64_t relative_packet_pos;
2279 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2281 if (ts == AV_NOPTS_VALUE) {
2282 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2283 return AVERROR(EINVAL);
2285 ts += track->ts_offset;
2287 if (mkv->cluster_pos != -1) {
2288 int64_t cluster_time = ts - mkv->cluster_pts;
2289 if ((int16_t)cluster_time != cluster_time) {
2291 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2295 if (mkv->cluster_pos == -1) {
2296 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2299 mkv->cluster_pos = avio_tell(s->pb);
2300 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2301 mkv->cluster_pts = FFMAX(0, ts);
2302 av_log(s, AV_LOG_DEBUG,
2303 "Starting new cluster with timestamp "
2304 "%" PRId64 " at offset %" PRId64 " bytes\n",
2305 mkv->cluster_pts, mkv->cluster_pos);
2307 pb = mkv->cluster_bc;
2309 relative_packet_pos = avio_tell(pb);
2311 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2312 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2315 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2316 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2317 mkv->cluster_pos, relative_packet_pos, -1);
2318 if (ret < 0) return ret;
2321 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2322 duration = mkv_write_vtt_blocks(s, pb, pkt);
2324 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2325 mkv_blockgroup_size(pkt->size));
2327 #if FF_API_CONVERGENCE_DURATION
2328 FF_DISABLE_DEPRECATION_WARNINGS
2329 /* For backward compatibility, prefer convergence_duration. */
2330 if (pkt->convergence_duration > 0) {
2331 duration = pkt->convergence_duration;
2333 FF_ENABLE_DEPRECATION_WARNINGS
2335 /* All subtitle blocks are considered to be keyframes. */
2336 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2337 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2338 end_ebml_master(pb, blockgroup);
2341 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2342 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2343 mkv->cluster_pos, relative_packet_pos, duration);
2349 mkv->duration = FFMAX(mkv->duration, ts + duration);
2350 track->duration = FFMAX(track->duration, ts + duration);
2355 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2357 MatroskaMuxContext *mkv = s->priv_data;
2358 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2359 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2361 int64_t cluster_time;
2363 int start_new_cluster;
2365 ret = mkv_check_new_extra_data(s, pkt);
2369 if (mkv->tracks[pkt->stream_index].write_dts)
2370 cluster_time = pkt->dts - mkv->cluster_pts;
2372 cluster_time = pkt->pts - mkv->cluster_pts;
2373 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2375 cluster_size = avio_tell(mkv->cluster_bc);
2377 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2378 // WebM DASH specification states that the first block of every cluster
2379 // has to be a key frame. So for DASH video, we only create a cluster
2380 // on seeing key frames.
2381 start_new_cluster = keyframe;
2382 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2383 (mkv->cluster_pos == -1 ||
2384 cluster_time > mkv->cluster_time_limit)) {
2385 // For DASH audio, we create a Cluster based on cluster_time_limit
2386 start_new_cluster = 1;
2387 } else if (!mkv->is_dash &&
2388 (cluster_size > mkv->cluster_size_limit ||
2389 cluster_time > mkv->cluster_time_limit ||
2390 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2391 cluster_size > 4 * 1024))) {
2392 start_new_cluster = 1;
2394 start_new_cluster = 0;
2397 if (mkv->cluster_pos != -1 && start_new_cluster) {
2401 if (!mkv->cluster_pos)
2402 avio_write_marker(s->pb,
2403 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2404 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2406 // check if we have an audio packet cached
2407 if (mkv->cur_audio_pkt.size > 0) {
2408 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2409 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2410 mkv->is_dash ? start_new_cluster : 0);
2411 av_packet_unref(&mkv->cur_audio_pkt);
2413 av_log(s, AV_LOG_ERROR,
2414 "Could not write cached audio packet ret:%d\n", ret);
2419 // buffer an audio packet to ensure the packet containing the video
2420 // keyframe's timecode is contained in the same cluster for WebM
2421 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2423 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2425 ret = mkv_write_packet_internal(s, pkt, 0);
2429 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2431 MatroskaMuxContext *mkv = s->priv_data;
2434 if (mkv->cluster_pos != -1) {
2436 av_log(s, AV_LOG_DEBUG,
2437 "Flushing cluster at offset %" PRIu64 " bytes\n",
2442 return mkv_write_packet(s, pkt);
2445 static int mkv_write_trailer(AVFormatContext *s)
2447 MatroskaMuxContext *mkv = s->priv_data;
2448 AVIOContext *pb = s->pb;
2451 // check if we have an audio packet cached
2452 if (mkv->cur_audio_pkt.size > 0) {
2453 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2455 av_log(s, AV_LOG_ERROR,
2456 "Could not write cached audio packet ret:%d\n", ret);
2461 if (mkv->cluster_bc) {
2462 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2463 MATROSKA_ID_CLUSTER, 0, 0);
2466 ret = mkv_write_chapters(s);
2471 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2472 int64_t endpos, ret64;
2474 endpos = avio_tell(pb);
2476 if (mkv->cues.num_entries) {
2477 AVIOContext *cues = NULL;
2479 int64_t cuespos = endpos;
2480 int length_size = 0;
2482 ret = start_ebml_master_crc32(&cues, mkv);
2486 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2487 mkv->tracks, s->nb_streams);
2489 ffio_free_dyn_buf(&cues);
2493 if (mkv->reserve_cues_space) {
2494 size = avio_tell(cues);
2495 length_size = ebml_num_size(size);
2496 size += 4 + length_size;
2497 if (mkv->reserve_cues_space < size) {
2498 av_log(s, AV_LOG_WARNING,
2499 "Insufficient space reserved for Cues: "
2500 "%d < %"PRIu64". No Cues will be output.\n",
2501 mkv->reserve_cues_space, size);
2502 mkv->reserve_cues_space = -1;
2503 ffio_free_dyn_buf(&cues);
2506 cuespos = mkv->cues_pos;
2507 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2508 ffio_free_dyn_buf(&cues);
2511 if (mkv->reserve_cues_space == size + 1) {
2512 /* There is no way to reserve a single byte because
2513 * the minimal size of an EBML Void element is 2
2514 * (1 byte ID, 1 byte length field). This problem
2515 * is solved by writing the Cues' length field on
2516 * one byte more than necessary. */
2522 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2523 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2525 if (mkv->reserve_cues_space) {
2526 if (size < mkv->reserve_cues_space)
2527 put_ebml_void(pb, mkv->reserve_cues_space - size);
2529 endpos = avio_tell(pb);
2533 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2537 // update the duration
2538 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2539 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2540 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2541 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2543 // write tracks master
2544 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2545 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2547 // update stream durations
2550 for (i = 0; i < s->nb_streams; ++i) {
2551 AVStream *st = s->streams[i];
2552 mkv_track *track = &mkv->tracks[i];
2554 if (track->duration_offset > 0) {
2555 double duration_sec = track->duration * av_q2d(st->time_base);
2556 char duration_string[20] = "";
2558 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2561 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2563 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2564 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2565 fmod(duration_sec, 60));
2567 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2571 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2572 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2575 avio_seek(pb, endpos, SEEK_SET);
2578 if (!mkv->is_live) {
2579 end_ebml_master(pb, mkv->segment);
2582 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2585 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2588 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2589 if (ff_mkv_codec_tags[i].id == codec_id)
2592 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2593 enum AVMediaType type = avcodec_get_type(codec_id);
2594 // mkv theoretically supports any video/audio through VFW/ACM
2595 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2602 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2605 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2606 if (ff_webm_codec_tags[i].id == codec_id)
2612 static int mkv_init(struct AVFormatContext *s)
2616 if (s->nb_streams > MAX_TRACKS) {
2617 av_log(s, AV_LOG_ERROR,
2618 "At most %d streams are supported for muxing in Matroska\n",
2620 return AVERROR(EINVAL);
2623 for (i = 0; i < s->nb_streams; i++) {
2624 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2625 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2626 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2627 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2628 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2629 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2630 av_log(s, AV_LOG_ERROR,
2631 "The Matroska muxer does not yet support muxing %s\n",
2632 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2633 return AVERROR_PATCHWELCOME;
2637 if (s->avoid_negative_ts < 0) {
2638 s->avoid_negative_ts = 1;
2639 s->internal->avoid_negative_ts_use_pts = 1;
2642 for (i = 0; i < s->nb_streams; i++) {
2643 // ms precision is the de-facto standard timescale for mkv files
2644 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2650 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2653 AVStream *st = s->streams[pkt->stream_index];
2655 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2656 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2657 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2658 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2659 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2665 static const AVCodecTag additional_audio_tags[] = {
2666 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2667 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2668 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2669 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2670 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2671 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2672 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2673 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2674 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2675 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2676 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2677 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2678 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2681 static const AVCodecTag additional_video_tags[] = {
2682 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2683 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2684 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2685 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2688 static const AVCodecTag additional_subtitle_tags[] = {
2689 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2690 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2691 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2692 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2695 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2696 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2697 static const AVOption options[] = {
2698 { "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 },
2699 { "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 },
2700 { "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 },
2701 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2702 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2703 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2704 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2705 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2709 #if CONFIG_MATROSKA_MUXER
2710 static const AVClass matroska_class = {
2711 .class_name = "matroska muxer",
2712 .item_name = av_default_item_name,
2714 .version = LIBAVUTIL_VERSION_INT,
2717 AVOutputFormat ff_matroska_muxer = {
2719 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2720 .mime_type = "video/x-matroska",
2721 .extensions = "mkv",
2722 .priv_data_size = sizeof(MatroskaMuxContext),
2723 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2724 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2725 .video_codec = CONFIG_LIBX264_ENCODER ?
2726 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2728 .deinit = mkv_deinit,
2729 .write_header = mkv_write_header,
2730 .write_packet = mkv_write_flush_packet,
2731 .write_trailer = mkv_write_trailer,
2732 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2733 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2734 .codec_tag = (const AVCodecTag* const []){
2735 ff_codec_bmp_tags, ff_codec_wav_tags,
2736 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2738 .subtitle_codec = AV_CODEC_ID_ASS,
2739 .query_codec = mkv_query_codec,
2740 .check_bitstream = mkv_check_bitstream,
2741 .priv_class = &matroska_class,
2745 #if CONFIG_WEBM_MUXER
2746 static const AVClass webm_class = {
2747 .class_name = "webm muxer",
2748 .item_name = av_default_item_name,
2750 .version = LIBAVUTIL_VERSION_INT,
2753 AVOutputFormat ff_webm_muxer = {
2755 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2756 .mime_type = "video/webm",
2757 .extensions = "webm",
2758 .priv_data_size = sizeof(MatroskaMuxContext),
2759 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2760 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2761 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2763 .deinit = mkv_deinit,
2764 .write_header = mkv_write_header,
2765 .write_packet = mkv_write_flush_packet,
2766 .write_trailer = mkv_write_trailer,
2767 .query_codec = webm_query_codec,
2768 .check_bitstream = mkv_check_bitstream,
2769 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2770 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2771 .priv_class = &webm_class,
2775 #if CONFIG_MATROSKA_AUDIO_MUXER
2776 static const AVClass mka_class = {
2777 .class_name = "matroska audio muxer",
2778 .item_name = av_default_item_name,
2780 .version = LIBAVUTIL_VERSION_INT,
2782 AVOutputFormat ff_matroska_audio_muxer = {
2784 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2785 .mime_type = "audio/x-matroska",
2786 .extensions = "mka",
2787 .priv_data_size = sizeof(MatroskaMuxContext),
2788 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2789 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2790 .video_codec = AV_CODEC_ID_NONE,
2792 .deinit = mkv_deinit,
2793 .write_header = mkv_write_header,
2794 .write_packet = mkv_write_flush_packet,
2795 .write_trailer = mkv_write_trailer,
2796 .check_bitstream = mkv_check_bitstream,
2797 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2799 .codec_tag = (const AVCodecTag* const []){
2800 ff_codec_wav_tags, additional_audio_tags, 0
2802 .priv_class = &mka_class,