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, uint64_t size)
293 int64_t currentpos = avio_tell(pb);
295 av_assert0(size >= 2);
297 put_ebml_id(pb, EBML_ID_VOID);
298 // we need to subtract the length needed to store the size from the
299 // size we need to reserve so 2 cases, we use 8 bytes to store the
300 // size if possible, 1 byte otherwise
302 put_ebml_num(pb, size - 2, 0);
304 put_ebml_num(pb, size - 9, 8);
305 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
308 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
309 uint64_t expectedsize)
311 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
313 put_ebml_id(pb, elementid);
314 put_ebml_size_unknown(pb, bytes);
315 return (ebml_master) { avio_tell(pb), bytes };
318 static void end_ebml_master(AVIOContext *pb, ebml_master master)
320 int64_t pos = avio_tell(pb);
322 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
324 put_ebml_num(pb, pos - master.pos, master.sizebytes);
325 avio_seek(pb, pos, SEEK_SET);
328 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
332 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
336 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
341 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
342 MatroskaMuxContext *mkv, uint32_t id,
345 uint8_t *buf, crc[4];
349 size = avio_close_dyn_buf(*dyn_cp, &buf);
350 put_ebml_num(pb, size, length_size);
351 if (mkv->write_crc) {
352 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
353 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
354 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
356 avio_write(pb, buf + skip, size - skip);
363 * Complete ebml master without destroying the buffer, allowing for later updates
365 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
366 uint32_t id, int64_t *pos)
369 int size = avio_get_dyn_buf(dyn_cp, &buf);
371 *pos = avio_tell(pb);
374 put_ebml_num(pb, size, 0);
375 avio_write(pb, buf, size);
378 static void put_xiph_size(AVIOContext *pb, int size)
380 ffio_fill(pb, 255, size / 255);
381 avio_w8(pb, size % 255);
385 * Free the members allocated in the mux context.
387 static void mkv_deinit(AVFormatContext *s)
389 MatroskaMuxContext *mkv = s->priv_data;
391 av_packet_unref(&mkv->cur_audio_pkt);
393 ffio_free_dyn_buf(&mkv->cluster_bc);
394 ffio_free_dyn_buf(&mkv->info_bc);
395 ffio_free_dyn_buf(&mkv->tracks_bc);
396 ffio_free_dyn_buf(&mkv->tags_bc);
398 av_freep(&mkv->cues.entries);
399 if (mkv->attachments) {
400 av_freep(&mkv->attachments->entries);
401 av_freep(&mkv->attachments);
403 av_freep(&mkv->tracks);
407 * Initialize the SeekHead element to be ready to index level 1 Matroska
408 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
409 * will be reserved at the current file location.
411 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
413 mkv->seekhead.filepos = avio_tell(pb);
414 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
415 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
416 // that an EBML void element will fit afterwards
417 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
418 put_ebml_void(pb, mkv->seekhead.reserved_size);
421 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
424 mkv_seekhead *seekhead = &mkv->seekhead;
426 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
428 seekhead->entries[seekhead->num_entries].elementid = elementid;
429 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
433 * Write the SeekHead to the file at the location reserved for it
434 * and seek to destpos afterwards. When error_on_seek_failure
435 * is not set, failure to seek to the position designated for the
436 * SeekHead is not considered an error and it is presumed that
437 * destpos is the current position; failure to seek to destpos
438 * afterwards is always an error.
440 * @return 0 on success, < 0 on error.
442 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
443 int error_on_seek_failure, int64_t destpos)
446 mkv_seekhead *seekhead = &mkv->seekhead;
447 int64_t remaining, ret64;
450 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
451 return error_on_seek_failure ? ret64 : 0;
453 ret = start_ebml_master_crc32(&dyn_cp, mkv);
457 for (i = 0; i < seekhead->num_entries; i++) {
458 mkv_seekhead_entry *entry = &seekhead->entries[i];
459 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
462 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
463 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
464 put_ebml_id(dyn_cp, entry->elementid);
466 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
467 end_ebml_master(dyn_cp, seekentry);
469 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0);
471 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
472 put_ebml_void(pb, remaining);
474 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
480 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
481 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
483 mkv_cues *cues = &mkv->cues;
484 mkv_cuepoint *entries = cues->entries;
489 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
491 return AVERROR(ENOMEM);
492 cues->entries = entries;
494 cues->entries[cues->num_entries].pts = ts;
495 cues->entries[cues->num_entries].stream_idx = stream;
496 cues->entries[cues->num_entries].tracknum = tracknum;
497 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
498 cues->entries[cues->num_entries].relative_pos = relative_pos;
499 cues->entries[cues->num_entries++].duration = duration;
504 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
505 mkv_cues *cues, mkv_track *tracks, int num_tracks)
507 AVIOContext *cuepoint;
510 ret = avio_open_dyn_buf(&cuepoint);
514 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
516 uint64_t pts = entry->pts;
520 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
522 // put all the entries from different tracks that have the exact same
523 // timestamp into the same CuePoint
524 for (int j = 0; j < num_tracks; j++)
525 tracks[j].has_cue = 0;
527 ebml_master track_positions;
528 int idx = entry->stream_idx;
530 av_assert0(idx >= 0 && idx < num_tracks);
531 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
533 tracks[idx].has_cue = 1;
534 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
535 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
536 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
537 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
538 if (entry->duration != -1)
539 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
540 end_ebml_master(cuepoint, track_positions);
541 } while (++entry < end && entry->pts == pts);
542 size = avio_get_dyn_buf(cuepoint, &buf);
543 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
544 ffio_reset_dyn_buf(cuepoint);
546 ffio_free_dyn_buf(&cuepoint);
551 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
553 const uint8_t *header_start[3];
555 int first_header_size;
558 if (par->codec_id == AV_CODEC_ID_VORBIS)
559 first_header_size = 30;
561 first_header_size = 42;
563 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
564 first_header_size, header_start, header_len) < 0) {
565 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
569 avio_w8(pb, 2); // number packets - 1
570 for (j = 0; j < 2; j++) {
571 put_xiph_size(pb, header_len[j]);
573 for (j = 0; j < 3; j++)
574 avio_write(pb, header_start[j], header_len[j]);
579 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
581 if (par->extradata && par->extradata_size == 2)
582 avio_write(pb, par->extradata, 2);
584 avio_wl16(pb, 0x410); // fallback to the most recent version
588 static int put_flac_codecpriv(AVFormatContext *s,
589 AVIOContext *pb, AVCodecParameters *par)
591 int write_comment = (par->channel_layout &&
592 !(par->channel_layout & ~0x3ffffULL) &&
593 !ff_flac_is_native_layout(par->channel_layout));
594 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
601 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
602 "Lavf" : LIBAVFORMAT_IDENT;
603 AVDictionary *dict = NULL;
604 uint8_t buf[32], *data, *p;
607 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
608 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
610 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
611 if (len >= ((1<<24) - 4)) {
613 return AVERROR(EINVAL);
616 data = av_malloc(len + 4);
619 return AVERROR(ENOMEM);
623 AV_WB24(data + 1, len);
626 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
628 avio_write(pb, data, len + 4);
637 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
638 int *sample_rate, int *output_sample_rate)
640 MPEG4AudioConfig mp4ac;
643 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
644 /* Don't abort if the failure is because of missing extradata. Assume in that
645 * case a bitstream filter will provide the muxer with the extradata in the
647 * Abort however if s->pb is not seekable, as we would not be able to seek back
648 * to write the sample rate elements once the extradata shows up, anyway. */
649 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
650 av_log(s, AV_LOG_ERROR,
651 "Error parsing AAC extradata, unable to determine samplerate.\n");
652 return AVERROR(EINVAL);
656 /* This will only happen when this function is called while writing the
657 * header and no extradata is available. The space for this element has
658 * to be reserved for when this function is called again after the
659 * extradata shows up in the first packet, as there's no way to know if
660 * output_sample_rate will be different than sample_rate or not. */
661 *output_sample_rate = *sample_rate;
663 *sample_rate = mp4ac.sample_rate;
664 *output_sample_rate = mp4ac.ext_sample_rate;
669 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
670 AVCodecParameters *par,
673 switch (par->codec_id) {
674 case AV_CODEC_ID_VORBIS:
675 case AV_CODEC_ID_THEORA:
676 return put_xiph_codecpriv(s, dyn_cp, par);
677 case AV_CODEC_ID_FLAC:
678 return put_flac_codecpriv(s, dyn_cp, par);
679 case AV_CODEC_ID_WAVPACK:
680 return put_wv_codecpriv(dyn_cp, par);
681 case AV_CODEC_ID_H264:
682 return ff_isom_write_avcc(dyn_cp, par->extradata,
683 par->extradata_size);
684 case AV_CODEC_ID_HEVC:
685 return ff_isom_write_hvcc(dyn_cp, par->extradata,
686 par->extradata_size, 0);
687 case AV_CODEC_ID_AV1:
688 if (par->extradata_size)
689 return ff_isom_write_av1c(dyn_cp, par->extradata,
690 par->extradata_size);
692 put_ebml_void(pb, 4 + 3);
694 case AV_CODEC_ID_ALAC:
695 if (par->extradata_size < 36) {
696 av_log(s, AV_LOG_ERROR,
697 "Invalid extradata found, ALAC expects a 36-byte "
699 return AVERROR_INVALIDDATA;
701 avio_write(dyn_cp, par->extradata + 12,
702 par->extradata_size - 12);
704 case AV_CODEC_ID_AAC:
705 if (par->extradata_size)
706 avio_write(dyn_cp, par->extradata, par->extradata_size);
708 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
711 if (par->codec_id == AV_CODEC_ID_PRORES &&
712 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
713 avio_wl32(dyn_cp, par->codec_tag);
714 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
715 avio_write(dyn_cp, par->extradata, par->extradata_size);
721 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
722 AVCodecParameters *par,
723 int native_id, int qt_id)
727 int ret, codecpriv_size;
729 ret = avio_open_dyn_buf(&dyn_cp);
734 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
735 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
738 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
740 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
741 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
744 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
745 avio_wl32(dyn_cp, par->codec_tag);
746 for(i = 0; i < 0x5a - 8; i++)
749 avio_write(dyn_cp, par->extradata, par->extradata_size);
751 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
752 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
753 avcodec_get_name(par->codec_id));
756 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
758 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
759 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
760 avcodec_get_name(par->codec_id));
761 ret = AVERROR(EINVAL);
764 ff_put_bmp_header(dyn_cp, par, 0, 0);
766 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
768 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
770 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
771 avcodec_get_name(par->codec_id));
772 ret = AVERROR(EINVAL);
775 par->codec_tag = tag;
777 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
780 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
782 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
784 ffio_free_dyn_buf(&dyn_cp);
788 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
790 uint8_t *colorinfo_ptr;
791 int side_data_size = 0;
792 int ret, colorinfo_size;
793 const uint8_t *side_data;
795 ret = avio_open_dyn_buf(&dyn_cp);
799 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
800 par->color_trc < AVCOL_TRC_NB) {
801 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
804 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
805 par->color_space < AVCOL_SPC_NB) {
806 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
808 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
809 par->color_primaries < AVCOL_PRI_NB) {
810 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
812 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
813 par->color_range < AVCOL_RANGE_NB) {
814 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
816 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
817 par->chroma_location <= AVCHROMA_LOC_TOP) {
820 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
821 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
825 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
827 if (side_data_size) {
828 const AVContentLightMetadata *metadata =
829 (const AVContentLightMetadata*)side_data;
830 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
834 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
836 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
837 ebml_master meta_element = start_ebml_master(
838 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
839 const AVMasteringDisplayMetadata *metadata =
840 (const AVMasteringDisplayMetadata*)side_data;
841 if (metadata->has_primaries) {
842 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
843 av_q2d(metadata->display_primaries[0][0]));
844 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
845 av_q2d(metadata->display_primaries[0][1]));
846 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
847 av_q2d(metadata->display_primaries[1][0]));
848 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
849 av_q2d(metadata->display_primaries[1][1]));
850 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
851 av_q2d(metadata->display_primaries[2][0]));
852 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
853 av_q2d(metadata->display_primaries[2][1]));
854 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
855 av_q2d(metadata->white_point[0]));
856 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
857 av_q2d(metadata->white_point[1]));
859 if (metadata->has_luminance) {
860 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
861 av_q2d(metadata->max_luminance));
862 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
863 av_q2d(metadata->min_luminance));
865 end_ebml_master(dyn_cp, meta_element);
868 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
869 if (colorinfo_size) {
870 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
871 avio_write(pb, colorinfo_ptr, colorinfo_size);
872 end_ebml_master(pb, colorinfo);
874 ffio_free_dyn_buf(&dyn_cp);
878 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
881 ebml_master projection;
882 int side_data_size = 0;
885 const AVSphericalMapping *spherical =
886 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
892 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
893 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
894 spherical->projection != AV_SPHERICAL_CUBEMAP) {
895 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
899 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
900 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
901 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
902 4 * (2 + 1 + 8) + (2 + 1 + 20));
904 switch (spherical->projection) {
905 case AV_SPHERICAL_EQUIRECTANGULAR:
906 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
907 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
909 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
910 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
911 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
912 AV_WB32(private, 0); // version + flags
913 AV_WB32(private + 4, spherical->bound_top);
914 AV_WB32(private + 8, spherical->bound_bottom);
915 AV_WB32(private + 12, spherical->bound_left);
916 AV_WB32(private + 16, spherical->bound_right);
917 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
920 case AV_SPHERICAL_CUBEMAP:
921 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
922 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
923 AV_WB32(private, 0); // version + flags
924 AV_WB32(private + 4, 0); // layout
925 AV_WB32(private + 8, spherical->padding);
926 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
934 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
935 (double) spherical->yaw / (1 << 16));
936 if (spherical->pitch)
937 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
938 (double) spherical->pitch / (1 << 16));
940 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
941 (double) spherical->roll / (1 << 16));
943 end_ebml_master(pb, projection);
948 static void mkv_write_field_order(AVIOContext *pb, int mode,
949 enum AVFieldOrder field_order)
951 switch (field_order) {
952 case AV_FIELD_UNKNOWN:
954 case AV_FIELD_PROGRESSIVE:
955 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
956 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
962 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
963 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
964 if (mode != MODE_WEBM) {
965 switch (field_order) {
967 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
968 MATROSKA_VIDEO_FIELDORDER_TT);
971 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
972 MATROSKA_VIDEO_FIELDORDER_BB);
975 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
976 MATROSKA_VIDEO_FIELDORDER_TB);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
980 MATROSKA_VIDEO_FIELDORDER_BT);
987 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
988 AVStream *st, int mode, int *h_width, int *h_height)
992 AVDictionaryEntry *tag;
993 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
997 // convert metadata into proper side data and add it to the stream
998 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
999 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1000 int stereo_mode = atoi(tag->value);
1002 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1003 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1008 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1009 stereo_mode != 10 && stereo_mode != 12) {
1010 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1016 // iterate to find the stereo3d side data
1017 for (i = 0; i < st->nb_side_data; i++) {
1018 AVPacketSideData sd = st->side_data[i];
1019 if (sd.type == AV_PKT_DATA_STEREO3D) {
1020 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1022 switch (stereo->type) {
1023 case AV_STEREO3D_2D:
1024 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1026 case AV_STEREO3D_SIDEBYSIDE:
1027 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1028 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1029 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1032 case AV_STEREO3D_TOPBOTTOM:
1033 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1034 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1038 case AV_STEREO3D_CHECKERBOARD:
1039 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1040 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1043 case AV_STEREO3D_LINES:
1044 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1045 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1049 case AV_STEREO3D_COLUMNS:
1050 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1051 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1055 case AV_STEREO3D_FRAMESEQUENCE:
1056 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1057 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1065 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1068 // if webm, do not write unsupported modes
1069 if ((mode == MODE_WEBM &&
1070 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1071 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1072 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1073 av_log(s, AV_LOG_ERROR,
1074 "The specified stereo mode is not valid.\n");
1075 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1076 return AVERROR(EINVAL);
1079 // write StereoMode if format is valid
1080 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1085 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1086 int i, AVIOContext *pb, int default_stream_exists)
1088 AVStream *st = s->streams[i];
1089 AVCodecParameters *par = st->codecpar;
1090 ebml_master subinfo, track;
1093 int bit_depth = av_get_bits_per_sample(par->codec_id);
1094 int sample_rate = par->sample_rate;
1095 int output_sample_rate = 0;
1096 int display_width_div = 1;
1097 int display_height_div = 1;
1099 AVDictionaryEntry *tag;
1101 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1102 mkv->have_attachments = 1;
1106 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1107 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1108 if (par->bits_per_raw_sample)
1109 bit_depth = par->bits_per_raw_sample;
1111 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1114 bit_depth = par->bits_per_coded_sample;
1117 if (par->codec_id == AV_CODEC_ID_AAC) {
1118 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1119 &output_sample_rate);
1124 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1125 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1126 mkv->is_dash ? mkv->dash_track_number : i + 1);
1127 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1128 mkv->is_dash ? mkv->dash_track_number : i + 1);
1129 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1131 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1132 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1133 tag = av_dict_get(st->metadata, "language", NULL, 0);
1134 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1135 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1136 } else if (tag && tag->value) {
1137 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1140 // The default value for TRACKFLAGDEFAULT is 1, so add element
1141 // if we need to clear it.
1142 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1143 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1145 if (st->disposition & AV_DISPOSITION_FORCED)
1146 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1148 if (mkv->mode == MODE_WEBM) {
1149 const char *codec_id;
1150 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1151 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1152 if (ff_webm_codec_tags[j].id == par->codec_id) {
1153 codec_id = ff_webm_codec_tags[j].str;
1158 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1159 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1160 codec_id = "D_WEBVTT/CAPTIONS";
1161 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1162 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1163 codec_id = "D_WEBVTT/DESCRIPTIONS";
1164 native_id = MATROSKA_TRACK_TYPE_METADATA;
1165 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1166 codec_id = "D_WEBVTT/METADATA";
1167 native_id = MATROSKA_TRACK_TYPE_METADATA;
1169 codec_id = "D_WEBVTT/SUBTITLES";
1170 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1175 av_log(s, AV_LOG_ERROR,
1176 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1177 return AVERROR(EINVAL);
1180 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1182 // look for a codec ID string specific to mkv to use,
1183 // if none are found, use AVI codes
1184 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1185 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1186 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1187 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1193 if (mkv->allow_raw_vfw) {
1196 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1197 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1198 return AVERROR(EINVAL);
1203 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1204 int64_t codecdelay = av_rescale_q(par->initial_padding,
1205 (AVRational){ 1, 48000 },
1206 (AVRational){ 1, 1000000000 });
1207 if (codecdelay < 0) {
1208 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1209 return AVERROR(EINVAL);
1211 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1212 // (AVRational){ 1, par->sample_rate },
1215 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1217 if (par->codec_id == AV_CODEC_ID_OPUS) {
1218 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1221 switch (par->codec_type) {
1222 case AVMEDIA_TYPE_VIDEO:
1223 mkv->have_video = 1;
1224 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1226 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1227 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1228 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1229 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1230 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1231 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1234 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1235 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1236 par->codec_id == AV_CODEC_ID_SVQ1 ||
1237 par->codec_id == AV_CODEC_ID_SVQ3 ||
1238 par->codec_id == AV_CODEC_ID_CINEPAK))
1242 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1243 else if (!native_id) {
1244 // if there is no mkv-specific codec ID, use VFW mode
1245 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1246 mkv->tracks[i].write_dts = 1;
1247 s->internal->avoid_negative_ts_use_pts = 0;
1250 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1252 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1253 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1255 mkv_write_field_order(pb, mkv->mode, par->field_order);
1257 // check both side data and metadata for stereo information,
1258 // write the result to the bitstream if any is found
1259 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1261 &display_height_div);
1265 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1266 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1267 (par->format == AV_PIX_FMT_YUVA420P)) {
1268 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1271 // write DisplayWidth and DisplayHeight, they contain the size of
1272 // a single source view and/or the display aspect ratio
1273 if (st->sample_aspect_ratio.num) {
1274 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1275 if (d_width > INT_MAX) {
1276 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1277 return AVERROR(EINVAL);
1279 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1280 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1281 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1282 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1284 AVRational display_aspect_ratio;
1285 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1286 par->width * (int64_t)st->sample_aspect_ratio.num,
1287 par->height * (int64_t)st->sample_aspect_ratio.den,
1289 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1290 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1291 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1294 } else if (display_width_div != 1 || display_height_div != 1) {
1295 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1296 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1297 } else if (mkv->mode != MODE_WEBM)
1298 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1300 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1301 uint32_t color_space = av_le2ne32(par->codec_tag);
1302 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1304 ret = mkv_write_video_color(pb, par, st);
1307 ret = mkv_write_video_projection(s, pb, st);
1310 end_ebml_master(pb, subinfo);
1313 case AVMEDIA_TYPE_AUDIO:
1314 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1317 // no mkv-specific ID, use ACM mode
1318 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1320 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1321 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1323 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1324 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1325 if (output_sample_rate)
1326 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1328 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1329 end_ebml_master(pb, subinfo);
1332 case AVMEDIA_TYPE_SUBTITLE:
1334 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1335 return AVERROR(ENOSYS);
1338 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1339 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1341 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1344 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1345 return AVERROR(EINVAL);
1348 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1349 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1350 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1355 end_ebml_master(pb, track);
1360 static int mkv_write_tracks(AVFormatContext *s)
1362 MatroskaMuxContext *mkv = s->priv_data;
1363 AVIOContext *pb = s->pb;
1364 int i, ret, default_stream_exists = 0;
1366 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1368 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1372 for (i = 0; i < s->nb_streams; i++) {
1373 AVStream *st = s->streams[i];
1374 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1376 for (i = 0; i < s->nb_streams; i++) {
1377 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1382 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1383 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1384 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1386 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0);
1391 static int mkv_write_chapters(AVFormatContext *s)
1393 MatroskaMuxContext *mkv = s->priv_data;
1394 AVIOContext *dyn_cp, *pb = s->pb;
1395 ebml_master editionentry;
1396 AVRational scale = {1, 1E9};
1399 if (!s->nb_chapters || mkv->wrote_chapters)
1402 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1404 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1405 if (ret < 0) return ret;
1407 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1408 if (mkv->mode != MODE_WEBM) {
1409 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1410 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1412 for (i = 0; i < s->nb_chapters; i++) {
1413 ebml_master chapteratom, chapterdisplay;
1414 AVChapter *c = s->chapters[i];
1415 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1416 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1417 AVDictionaryEntry *t = NULL;
1418 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1419 av_log(s, AV_LOG_ERROR,
1420 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1421 chapterstart, chapterend);
1422 return AVERROR_INVALIDDATA;
1425 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1426 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1427 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1428 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1429 if (mkv->mode != MODE_WEBM) {
1430 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1431 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1433 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1434 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1435 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1436 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1437 end_ebml_master(dyn_cp, chapterdisplay);
1439 end_ebml_master(dyn_cp, chapteratom);
1441 end_ebml_master(dyn_cp, editionentry);
1442 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0);
1444 mkv->wrote_chapters = 1;
1448 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1450 uint8_t *key = av_strdup(t->key);
1452 const uint8_t *lang = NULL;
1456 return AVERROR(ENOMEM);
1458 if ((p = strrchr(p, '-')) &&
1459 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1466 else if (*p >= 'a' && *p <= 'z')
1471 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1472 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1474 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1475 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1476 end_ebml_master(pb, tag);
1482 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1483 unsigned int uid, ebml_master *tag)
1486 MatroskaMuxContext *mkv = s->priv_data;
1487 ebml_master targets;
1490 if (!mkv->tags_bc) {
1491 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1493 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1499 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1500 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1502 put_ebml_uint(pb, elementid, uid);
1503 end_ebml_master(pb, targets);
1507 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1509 return av_strcasecmp(name, "title") &&
1510 av_strcasecmp(name, "stereo_mode") &&
1511 av_strcasecmp(name, "creation_time") &&
1512 av_strcasecmp(name, "encoding_tool") &&
1513 av_strcasecmp(name, "duration") &&
1514 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1515 av_strcasecmp(name, "language")) &&
1516 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1517 (av_strcasecmp(name, "filename") &&
1518 av_strcasecmp(name, "mimetype")));
1521 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1524 MatroskaMuxContext *mkv = s->priv_data;
1527 AVDictionaryEntry *t = NULL;
1529 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1533 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1534 if (mkv_check_tag_name(t->key, elementid)) {
1535 ret = mkv_write_simpletag(mkv->tags_bc, t);
1541 end_ebml_master(mkv->tags_bc, tag);
1545 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1547 AVDictionaryEntry *t = NULL;
1549 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1550 if (mkv_check_tag_name(t->key, elementid))
1556 static int mkv_write_tags(AVFormatContext *s)
1558 MatroskaMuxContext *mkv = s->priv_data;
1561 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1563 if (mkv_check_tag(s->metadata, 0)) {
1564 ret = mkv_write_tag(s, s->metadata, 0, 0);
1565 if (ret < 0) return ret;
1568 for (i = 0; i < s->nb_streams; i++) {
1569 AVStream *st = s->streams[i];
1571 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1574 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1577 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1578 if (ret < 0) return ret;
1581 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1582 for (i = 0; i < s->nb_streams; i++) {
1584 AVStream *st = s->streams[i];
1585 ebml_master tag_target;
1588 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1591 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1592 i + 1, &tag_target);
1597 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1598 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1599 mkv->tracks[i].duration_offset = avio_tell(pb);
1601 // Reserve space to write duration as a 20-byte string.
1602 // 2 (ebml id) + 1 (data size) + 20 (data)
1603 put_ebml_void(pb, 23);
1604 end_ebml_master(pb, tag);
1605 end_ebml_master(pb, tag_target);
1609 if (mkv->mode != MODE_WEBM) {
1610 for (i = 0; i < s->nb_chapters; i++) {
1611 AVChapter *ch = s->chapters[i];
1613 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1616 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1622 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1623 for (i = 0; i < mkv->attachments->num_entries; i++) {
1624 mkv_attachment *attachment = &mkv->attachments->entries[i];
1625 AVStream *st = s->streams[attachment->stream_idx];
1627 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1630 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1637 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1638 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1639 MATROSKA_ID_TAGS, &mkv->tags_pos);
1641 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0);
1646 static int mkv_write_attachments(AVFormatContext *s)
1648 MatroskaMuxContext *mkv = s->priv_data;
1649 AVIOContext *dyn_cp, *pb = s->pb;
1653 if (!mkv->have_attachments)
1656 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1657 if (!mkv->attachments)
1658 return AVERROR(ENOMEM);
1660 av_lfg_init(&c, av_get_random_seed());
1662 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1664 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1665 if (ret < 0) return ret;
1667 for (i = 0; i < s->nb_streams; i++) {
1668 AVStream *st = s->streams[i];
1669 ebml_master attached_file;
1670 mkv_attachment *attachment = mkv->attachments->entries;
1671 AVDictionaryEntry *t;
1672 const char *mimetype = NULL;
1675 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1678 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1680 return AVERROR(ENOMEM);
1681 mkv->attachments->entries = attachment;
1683 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1685 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1686 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1687 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1688 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1689 return AVERROR(EINVAL);
1691 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1692 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1693 mimetype = t->value;
1694 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1696 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1697 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1698 mimetype = ff_mkv_mime_tags[i].str;
1701 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1702 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1703 mimetype = ff_mkv_image_mime_tags[i].str;
1708 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1709 "it cannot be deduced from the codec id.\n", i);
1710 return AVERROR(EINVAL);
1713 if (s->flags & AVFMT_FLAG_BITEXACT) {
1714 struct AVSHA *sha = av_sha_alloc();
1717 return AVERROR(ENOMEM);
1718 av_sha_init(sha, 160);
1719 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1720 av_sha_final(sha, digest);
1722 fileuid = AV_RL32(digest);
1724 fileuid = av_lfg_get(&c);
1726 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1727 fileuid, mkv->attachments->num_entries);
1729 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1730 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1731 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1732 end_ebml_master(dyn_cp, attached_file);
1734 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1735 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1737 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0);
1742 static int64_t get_metadata_duration(AVFormatContext *s)
1748 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1749 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1750 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1754 for (i = 0; i < s->nb_streams; i++) {
1756 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1758 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1759 max = FFMAX(max, us);
1762 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1766 static int mkv_write_header(AVFormatContext *s)
1768 MatroskaMuxContext *mkv = s->priv_data;
1769 AVIOContext *pb = s->pb;
1770 ebml_master ebml_header;
1771 AVDictionaryEntry *tag;
1772 int ret, i, version = 2;
1773 int64_t creation_time;
1775 if (!strcmp(s->oformat->name, "webm")) {
1776 mkv->mode = MODE_WEBM;
1779 mkv->mode = MODE_MATROSKAv2;
1781 if (mkv->mode != MODE_WEBM ||
1782 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1783 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1786 for (i = 0; i < s->nb_streams; i++) {
1787 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1788 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1789 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1793 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1795 return AVERROR(ENOMEM);
1797 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1798 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1799 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1800 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1801 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1802 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1803 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1804 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1805 end_ebml_master(pb, ebml_header);
1807 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1808 mkv->segment_offset = avio_tell(pb);
1810 // we write a seek head at the beginning to point to all other level
1811 // one elements (except Clusters).
1812 mkv_start_seekhead(mkv, pb);
1814 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1816 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1821 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1822 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1823 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1824 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1825 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1826 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1827 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1829 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1831 if (mkv->mode != MODE_WEBM) {
1832 uint32_t segment_uid[4];
1835 av_lfg_init(&lfg, av_get_random_seed());
1837 for (i = 0; i < 4; i++)
1838 segment_uid[i] = av_lfg_get(&lfg);
1840 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1843 const char *ident = "Lavf";
1844 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1845 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1848 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1849 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1850 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1851 uint8_t date_utc_buf[8];
1852 AV_WB64(date_utc_buf, date_utc);
1853 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1856 // reserve space for the duration
1858 mkv->duration_offset = avio_tell(pb);
1859 if (!mkv->is_live) {
1860 int64_t metadata_duration = get_metadata_duration(s);
1862 if (s->duration > 0) {
1863 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1864 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1865 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1866 } else if (metadata_duration > 0) {
1867 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1868 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1869 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1871 put_ebml_void(pb, 11); // assumes double-precision float to be written
1874 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1875 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1876 MATROSKA_ID_INFO, &mkv->info_pos);
1878 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0);
1881 ret = mkv_write_tracks(s);
1885 for (i = 0; i < s->nb_chapters; i++)
1886 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1888 ret = mkv_write_chapters(s);
1892 if (mkv->mode != MODE_WEBM) {
1893 ret = mkv_write_attachments(s);
1898 ret = mkv_write_tags(s);
1902 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1903 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1908 if (s->metadata_header_padding > 0) {
1909 if (s->metadata_header_padding == 1)
1910 s->metadata_header_padding++;
1911 put_ebml_void(pb, s->metadata_header_padding);
1914 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1915 mkv->cues_pos = avio_tell(pb);
1916 if (mkv->reserve_cues_space == 1)
1917 mkv->reserve_cues_space++;
1918 put_ebml_void(pb, mkv->reserve_cues_space);
1921 av_init_packet(&mkv->cur_audio_pkt);
1922 mkv->cur_audio_pkt.size = 0;
1923 mkv->cluster_pos = -1;
1925 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1926 // after 4k and on a keyframe
1927 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1928 if (mkv->cluster_time_limit < 0)
1929 mkv->cluster_time_limit = 5000;
1930 if (mkv->cluster_size_limit < 0)
1931 mkv->cluster_size_limit = 5 * 1024 * 1024;
1933 if (mkv->cluster_time_limit < 0)
1934 mkv->cluster_time_limit = 1000;
1935 if (mkv->cluster_size_limit < 0)
1936 mkv->cluster_size_limit = 32 * 1024;
1942 static int mkv_blockgroup_size(int pkt_size)
1944 int size = pkt_size + 4;
1945 size += ebml_num_size(size);
1946 size += 2; // EBML ID for block and block duration
1947 size += 9; // max size of block duration incl. length field
1951 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1958 dst = av_malloc(srclen);
1960 return AVERROR(ENOMEM);
1962 while (srclen >= WV_HEADER_SIZE) {
1965 ret = ff_wv_parse_header(&header, src);
1968 src += WV_HEADER_SIZE;
1969 srclen -= WV_HEADER_SIZE;
1971 if (srclen < header.blocksize) {
1972 ret = AVERROR_INVALIDDATA;
1976 if (header.initial) {
1977 AV_WL32(dst + offset, header.samples);
1980 AV_WL32(dst + offset, header.flags);
1981 AV_WL32(dst + offset + 4, header.crc);
1984 if (!(header.initial && header.final)) {
1985 AV_WL32(dst + offset, header.blocksize);
1989 memcpy(dst + offset, src, header.blocksize);
1990 src += header.blocksize;
1991 srclen -= header.blocksize;
1992 offset += header.blocksize;
2004 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2005 uint32_t blockid, AVPacket *pkt, int keyframe)
2007 MatroskaMuxContext *mkv = s->priv_data;
2008 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2009 mkv_track *track = &mkv->tracks[pkt->stream_index];
2010 uint8_t *data = NULL, *side_data = NULL;
2011 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2012 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2013 uint64_t additional_id = 0;
2014 int64_t discard_padding = 0;
2015 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2016 ebml_master block_group, block_additions, block_more;
2018 ts += track->ts_offset;
2020 /* The following string is identical to the one in mkv_write_vtt_blocks
2021 * so that only one copy needs to exist in binaries. */
2022 av_log(s, AV_LOG_DEBUG,
2023 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2024 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2025 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2026 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2027 mkv->cluster_pos, track_number, keyframe != 0);
2029 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2030 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2031 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2032 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2033 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2034 /* extradata is Annex B, assume the bitstream is too and convert it */
2035 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2036 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2037 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2038 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2039 err = mkv_strip_wavpack(pkt->data, &data, &size);
2044 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2045 "a packet from stream %d.\n", pkt->stream_index);
2049 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2050 /* Matroska specification requires to remove the first QuickTime atom
2056 side_data = av_packet_get_side_data(pkt,
2057 AV_PKT_DATA_SKIP_SAMPLES,
2059 if (side_data && side_data_size >= 10) {
2060 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2061 (AVRational){1, par->sample_rate},
2062 (AVRational){1, 1000000000});
2065 side_data = av_packet_get_side_data(pkt,
2066 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2069 if (side_data_size < 8) {
2072 additional_id = AV_RB64(side_data);
2074 side_data_size -= 8;
2078 if ((side_data_size && additional_id == 1) || discard_padding) {
2079 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2080 blockid = MATROSKA_ID_BLOCK;
2083 put_ebml_id(pb, blockid);
2084 put_ebml_num(pb, size + 4, 0);
2085 // this assumes stream_index is less than 126
2086 avio_w8(pb, 0x80 | track_number);
2087 avio_wb16(pb, ts - mkv->cluster_pts);
2088 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2089 avio_write(pb, data + offset, size);
2090 if (data != pkt->data)
2093 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2094 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2096 track->last_timestamp = ts;
2098 if (discard_padding) {
2099 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2102 if (side_data_size && additional_id == 1) {
2103 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2104 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2105 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2106 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2107 put_ebml_num(pb, side_data_size, 0);
2108 avio_write(pb, side_data, side_data_size);
2109 end_ebml_master(pb, block_more);
2110 end_ebml_master(pb, block_additions);
2112 if ((side_data_size && additional_id == 1) || discard_padding) {
2113 end_ebml_master(pb, block_group);
2119 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2121 MatroskaMuxContext *mkv = s->priv_data;
2122 ebml_master blockgroup;
2123 int id_size, settings_size, size;
2124 uint8_t *id, *settings;
2125 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2126 const int flags = 0;
2129 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2133 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2136 size = id_size + 1 + settings_size + 1 + pkt->size;
2138 /* The following string is identical to the one in mkv_write_block so that
2139 * only one copy needs to exist in binaries. */
2140 av_log(s, AV_LOG_DEBUG,
2141 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2142 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2143 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2144 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2145 mkv->cluster_pos, pkt->stream_index + 1, 1);
2147 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2149 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2150 put_ebml_num(pb, size + 4, 0);
2151 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2152 avio_wb16(pb, ts - mkv->cluster_pts);
2154 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2156 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2157 end_ebml_master(pb, blockgroup);
2159 return pkt->duration;
2162 static void mkv_end_cluster(AVFormatContext *s)
2164 MatroskaMuxContext *mkv = s->priv_data;
2166 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0);
2167 mkv->cluster_pos = -1;
2168 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2171 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2173 MatroskaMuxContext *mkv = s->priv_data;
2174 mkv_track *track = &mkv->tracks[pkt->stream_index];
2175 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2177 int side_data_size = 0, ret;
2179 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2182 switch (par->codec_id) {
2183 case AV_CODEC_ID_AAC:
2184 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2185 int filler, output_sample_rate = 0;
2187 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2188 &output_sample_rate);
2191 if (!output_sample_rate)
2192 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2193 ret = ff_alloc_extradata(par, side_data_size);
2196 memcpy(par->extradata, side_data, side_data_size);
2197 curpos = avio_tell(mkv->tracks_bc);
2198 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2199 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2200 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2202 put_ebml_void(mkv->tracks_bc, filler);
2203 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2204 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2205 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2206 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2207 } else if (!par->extradata_size && !track->sample_rate) {
2208 // No extradata (codecpar or packet side data).
2209 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2210 return AVERROR(EINVAL);
2213 case AV_CODEC_ID_FLAC:
2214 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2215 AVCodecParameters *codecpriv_par;
2217 if (side_data_size != par->extradata_size) {
2218 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2220 return AVERROR(EINVAL);
2222 codecpriv_par = avcodec_parameters_alloc();
2224 return AVERROR(ENOMEM);
2225 ret = avcodec_parameters_copy(codecpriv_par, par);
2227 avcodec_parameters_free(&codecpriv_par);
2230 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2231 curpos = avio_tell(mkv->tracks_bc);
2232 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2233 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2234 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2235 avcodec_parameters_free(&codecpriv_par);
2238 // FIXME: Remove the following once libaom starts propagating extradata during init()
2239 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2240 case AV_CODEC_ID_AV1:
2241 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2242 !par->extradata_size) {
2243 AVIOContext *dyn_cp;
2247 ret = avio_open_dyn_buf(&dyn_cp);
2250 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2251 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2252 if (!codecpriv_size) {
2254 return AVERROR_INVALIDDATA;
2256 curpos = avio_tell(mkv->tracks_bc);
2257 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2258 // Do not write the OBUs as we don't have space saved for them
2259 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2261 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2262 ret = ff_alloc_extradata(par, side_data_size);
2265 memcpy(par->extradata, side_data, side_data_size);
2266 } else if (!par->extradata_size)
2267 return AVERROR_INVALIDDATA;
2271 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2278 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2280 MatroskaMuxContext *mkv = s->priv_data;
2282 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2283 mkv_track *track = &mkv->tracks[pkt->stream_index];
2284 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2285 int duration = pkt->duration;
2287 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2288 int64_t relative_packet_pos;
2289 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2291 if (ts == AV_NOPTS_VALUE) {
2292 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2293 return AVERROR(EINVAL);
2295 ts += track->ts_offset;
2297 if (mkv->cluster_pos != -1) {
2298 int64_t cluster_time = ts - mkv->cluster_pts;
2299 if ((int16_t)cluster_time != cluster_time) {
2301 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2305 if (mkv->cluster_pos == -1) {
2306 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2309 mkv->cluster_pos = avio_tell(s->pb);
2310 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2311 mkv->cluster_pts = FFMAX(0, ts);
2312 av_log(s, AV_LOG_DEBUG,
2313 "Starting new cluster with timestamp "
2314 "%" PRId64 " at offset %" PRId64 " bytes\n",
2315 mkv->cluster_pts, mkv->cluster_pos);
2317 pb = mkv->cluster_bc;
2319 relative_packet_pos = avio_tell(pb);
2321 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2322 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2325 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2326 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2327 mkv->cluster_pos, relative_packet_pos, -1);
2328 if (ret < 0) return ret;
2331 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2332 duration = mkv_write_vtt_blocks(s, pb, pkt);
2334 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2335 mkv_blockgroup_size(pkt->size));
2337 #if FF_API_CONVERGENCE_DURATION
2338 FF_DISABLE_DEPRECATION_WARNINGS
2339 /* For backward compatibility, prefer convergence_duration. */
2340 if (pkt->convergence_duration > 0) {
2341 duration = pkt->convergence_duration;
2343 FF_ENABLE_DEPRECATION_WARNINGS
2345 /* All subtitle blocks are considered to be keyframes. */
2346 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2347 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2348 end_ebml_master(pb, blockgroup);
2351 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2352 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2353 mkv->cluster_pos, relative_packet_pos, duration);
2359 mkv->duration = FFMAX(mkv->duration, ts + duration);
2360 track->duration = FFMAX(track->duration, ts + duration);
2365 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2367 MatroskaMuxContext *mkv = s->priv_data;
2368 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2369 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2371 int64_t cluster_time;
2373 int start_new_cluster;
2375 ret = mkv_check_new_extra_data(s, pkt);
2379 if (mkv->tracks[pkt->stream_index].write_dts)
2380 cluster_time = pkt->dts - mkv->cluster_pts;
2382 cluster_time = pkt->pts - mkv->cluster_pts;
2383 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2385 cluster_size = avio_tell(mkv->cluster_bc);
2387 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2388 // WebM DASH specification states that the first block of every cluster
2389 // has to be a key frame. So for DASH video, we only create a cluster
2390 // on seeing key frames.
2391 start_new_cluster = keyframe;
2392 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2393 (mkv->cluster_pos == -1 ||
2394 cluster_time > mkv->cluster_time_limit)) {
2395 // For DASH audio, we create a Cluster based on cluster_time_limit
2396 start_new_cluster = 1;
2397 } else if (!mkv->is_dash &&
2398 (cluster_size > mkv->cluster_size_limit ||
2399 cluster_time > mkv->cluster_time_limit ||
2400 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2401 cluster_size > 4 * 1024))) {
2402 start_new_cluster = 1;
2404 start_new_cluster = 0;
2407 if (mkv->cluster_pos != -1 && start_new_cluster) {
2411 if (!mkv->cluster_pos)
2412 avio_write_marker(s->pb,
2413 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2414 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2416 // check if we have an audio packet cached
2417 if (mkv->cur_audio_pkt.size > 0) {
2418 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2419 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2420 mkv->is_dash ? start_new_cluster : 0);
2421 av_packet_unref(&mkv->cur_audio_pkt);
2423 av_log(s, AV_LOG_ERROR,
2424 "Could not write cached audio packet ret:%d\n", ret);
2429 // buffer an audio packet to ensure the packet containing the video
2430 // keyframe's timecode is contained in the same cluster for WebM
2431 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2433 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2435 ret = mkv_write_packet_internal(s, pkt, 0);
2439 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2441 MatroskaMuxContext *mkv = s->priv_data;
2444 if (mkv->cluster_pos != -1) {
2446 av_log(s, AV_LOG_DEBUG,
2447 "Flushing cluster at offset %" PRIu64 " bytes\n",
2452 return mkv_write_packet(s, pkt);
2455 static int mkv_write_trailer(AVFormatContext *s)
2457 MatroskaMuxContext *mkv = s->priv_data;
2458 AVIOContext *pb = s->pb;
2461 // check if we have an audio packet cached
2462 if (mkv->cur_audio_pkt.size > 0) {
2463 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2465 av_log(s, AV_LOG_ERROR,
2466 "Could not write cached audio packet ret:%d\n", ret);
2471 if (mkv->cluster_bc) {
2472 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0);
2475 ret = mkv_write_chapters(s);
2480 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2481 int64_t endpos, ret64;
2483 endpos = avio_tell(pb);
2485 if (mkv->cues.num_entries) {
2488 int64_t cuespos = endpos;
2489 int length_size = 0;
2491 ret = start_ebml_master_crc32(&cues, mkv);
2495 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2496 mkv->tracks, s->nb_streams);
2498 ffio_free_dyn_buf(&cues);
2502 if (mkv->reserve_cues_space) {
2503 size = avio_tell(cues);
2504 length_size = ebml_num_size(size);
2505 size += 4 + length_size;
2506 if (mkv->reserve_cues_space < size) {
2507 av_log(s, AV_LOG_WARNING,
2508 "Insufficient space reserved for Cues: "
2509 "%d < %"PRIu64". No Cues will be output.\n",
2510 mkv->reserve_cues_space, size);
2511 mkv->reserve_cues_space = -1;
2512 ffio_free_dyn_buf(&cues);
2515 cuespos = mkv->cues_pos;
2516 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2517 ffio_free_dyn_buf(&cues);
2520 if (mkv->reserve_cues_space == size + 1) {
2521 /* There is no way to reserve a single byte because
2522 * the minimal size of an EBML Void element is 2
2523 * (1 byte ID, 1 byte length field). This problem
2524 * is solved by writing the Cues' length field on
2525 * one byte more than necessary. */
2531 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2532 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES, length_size);
2533 if (mkv->reserve_cues_space) {
2534 if (size < mkv->reserve_cues_space)
2535 put_ebml_void(pb, mkv->reserve_cues_space - size);
2537 endpos = avio_tell(pb);
2541 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2545 // update the duration
2546 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2547 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2548 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2549 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0);
2551 // write tracks master
2552 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2553 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0);
2555 // update stream durations
2556 if (!mkv->is_live) {
2558 int64_t curr = avio_tell(mkv->tags_bc);
2559 for (i = 0; i < s->nb_streams; ++i) {
2560 AVStream *st = s->streams[i];
2561 mkv_track *track = &mkv->tracks[i];
2563 if (track->duration_offset > 0) {
2564 double duration_sec = track->duration * av_q2d(st->time_base);
2565 char duration_string[20] = "";
2567 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2570 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2572 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2573 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2574 fmod(duration_sec, 60));
2576 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2579 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2581 if (mkv->tags_bc && !mkv->is_live) {
2582 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2583 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0);
2586 avio_seek(pb, endpos, SEEK_SET);
2589 if (!mkv->is_live) {
2590 end_ebml_master(pb, mkv->segment);
2593 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2596 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2599 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2600 if (ff_mkv_codec_tags[i].id == codec_id)
2603 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2604 enum AVMediaType type = avcodec_get_type(codec_id);
2605 // mkv theoretically supports any video/audio through VFW/ACM
2606 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2613 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2616 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2617 if (ff_webm_codec_tags[i].id == codec_id)
2623 static int mkv_init(struct AVFormatContext *s)
2627 if (s->nb_streams > MAX_TRACKS) {
2628 av_log(s, AV_LOG_ERROR,
2629 "At most %d streams are supported for muxing in Matroska\n",
2631 return AVERROR(EINVAL);
2634 for (i = 0; i < s->nb_streams; i++) {
2635 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2636 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2637 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2638 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2639 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2640 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2641 av_log(s, AV_LOG_ERROR,
2642 "The Matroska muxer does not yet support muxing %s\n",
2643 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2644 return AVERROR_PATCHWELCOME;
2648 if (s->avoid_negative_ts < 0) {
2649 s->avoid_negative_ts = 1;
2650 s->internal->avoid_negative_ts_use_pts = 1;
2653 for (i = 0; i < s->nb_streams; i++) {
2654 // ms precision is the de-facto standard timescale for mkv files
2655 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2661 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2664 AVStream *st = s->streams[pkt->stream_index];
2666 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2667 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2668 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2669 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2670 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2676 static const AVCodecTag additional_audio_tags[] = {
2677 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2678 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2679 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2680 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2681 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2682 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2683 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2684 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2685 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2686 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2687 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2688 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2689 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2692 static const AVCodecTag additional_video_tags[] = {
2693 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2694 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2695 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2696 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2699 static const AVCodecTag additional_subtitle_tags[] = {
2700 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2701 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2702 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2703 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2706 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2707 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2708 static const AVOption options[] = {
2709 { "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 },
2710 { "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 },
2711 { "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 },
2712 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2713 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2714 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2715 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2716 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2720 #if CONFIG_MATROSKA_MUXER
2721 static const AVClass matroska_class = {
2722 .class_name = "matroska muxer",
2723 .item_name = av_default_item_name,
2725 .version = LIBAVUTIL_VERSION_INT,
2728 AVOutputFormat ff_matroska_muxer = {
2730 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2731 .mime_type = "video/x-matroska",
2732 .extensions = "mkv",
2733 .priv_data_size = sizeof(MatroskaMuxContext),
2734 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2735 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2736 .video_codec = CONFIG_LIBX264_ENCODER ?
2737 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2739 .deinit = mkv_deinit,
2740 .write_header = mkv_write_header,
2741 .write_packet = mkv_write_flush_packet,
2742 .write_trailer = mkv_write_trailer,
2743 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2744 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2745 .codec_tag = (const AVCodecTag* const []){
2746 ff_codec_bmp_tags, ff_codec_wav_tags,
2747 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2749 .subtitle_codec = AV_CODEC_ID_ASS,
2750 .query_codec = mkv_query_codec,
2751 .check_bitstream = mkv_check_bitstream,
2752 .priv_class = &matroska_class,
2756 #if CONFIG_WEBM_MUXER
2757 static const AVClass webm_class = {
2758 .class_name = "webm muxer",
2759 .item_name = av_default_item_name,
2761 .version = LIBAVUTIL_VERSION_INT,
2764 AVOutputFormat ff_webm_muxer = {
2766 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2767 .mime_type = "video/webm",
2768 .extensions = "webm",
2769 .priv_data_size = sizeof(MatroskaMuxContext),
2770 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2771 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2772 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2774 .deinit = mkv_deinit,
2775 .write_header = mkv_write_header,
2776 .write_packet = mkv_write_flush_packet,
2777 .write_trailer = mkv_write_trailer,
2778 .query_codec = webm_query_codec,
2779 .check_bitstream = mkv_check_bitstream,
2780 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2781 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2782 .priv_class = &webm_class,
2786 #if CONFIG_MATROSKA_AUDIO_MUXER
2787 static const AVClass mka_class = {
2788 .class_name = "matroska audio muxer",
2789 .item_name = av_default_item_name,
2791 .version = LIBAVUTIL_VERSION_INT,
2793 AVOutputFormat ff_matroska_audio_muxer = {
2795 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2796 .mime_type = "audio/x-matroska",
2797 .extensions = "mka",
2798 .priv_data_size = sizeof(MatroskaMuxContext),
2799 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2800 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2801 .video_codec = AV_CODEC_ID_NONE,
2803 .deinit = mkv_deinit,
2804 .write_header = mkv_write_header,
2805 .write_packet = mkv_write_flush_packet,
2806 .write_trailer = mkv_write_trailer,
2807 .check_bitstream = mkv_check_bitstream,
2808 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2810 .codec_tag = (const AVCodecTag* const []){
2811 ff_codec_wav_tags, additional_audio_tags, 0
2813 .priv_class = &mka_class,