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)
344 uint8_t *buf, crc[4];
348 size = avio_close_dyn_buf(*dyn_cp, &buf);
349 put_ebml_num(pb, size, 0);
350 if (mkv->write_crc) {
351 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
352 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
353 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
355 avio_write(pb, buf + skip, size - skip);
362 * Complete ebml master without destroying the buffer, allowing for later updates
364 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
365 uint32_t id, int64_t *pos)
368 int size = avio_get_dyn_buf(*dyn_cp, &buf);
370 *pos = avio_tell(pb);
373 put_ebml_num(pb, size, 0);
374 avio_write(pb, buf, size);
377 static void put_xiph_size(AVIOContext *pb, int size)
379 ffio_fill(pb, 255, size / 255);
380 avio_w8(pb, size % 255);
384 * Free the members allocated in the mux context.
386 static void mkv_deinit(AVFormatContext *s)
388 MatroskaMuxContext *mkv = s->priv_data;
390 av_packet_unref(&mkv->cur_audio_pkt);
392 ffio_free_dyn_buf(&mkv->cluster_bc);
393 ffio_free_dyn_buf(&mkv->info_bc);
394 ffio_free_dyn_buf(&mkv->tracks_bc);
395 ffio_free_dyn_buf(&mkv->tags_bc);
397 av_freep(&mkv->cues.entries);
398 if (mkv->attachments) {
399 av_freep(&mkv->attachments->entries);
400 av_freep(&mkv->attachments);
402 av_freep(&mkv->tracks);
406 * Initialize the SeekHead element to be ready to index level 1 Matroska
407 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
408 * will be reserved at the current file location.
410 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
412 mkv->seekhead.filepos = avio_tell(pb);
413 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
414 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
415 // that an EBML void element will fit afterwards
416 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
417 put_ebml_void(pb, mkv->seekhead.reserved_size);
420 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
423 mkv_seekhead *seekhead = &mkv->seekhead;
425 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
427 seekhead->entries[seekhead->num_entries].elementid = elementid;
428 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
432 * Write the SeekHead to the file at the location reserved for it
433 * and seek to destpos afterwards. When error_on_seek_failure
434 * is not set, failure to seek to the position designated for the
435 * SeekHead is not considered an error and it is presumed that
436 * destpos is the current position; failure to seek to destpos
437 * afterwards is always an error.
439 * @return 0 on success, < 0 on error.
441 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
442 int error_on_seek_failure, int64_t destpos)
445 mkv_seekhead *seekhead = &mkv->seekhead;
446 int64_t remaining, ret64;
449 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
450 return error_on_seek_failure ? ret64 : 0;
452 ret = start_ebml_master_crc32(&dyn_cp, mkv);
456 for (i = 0; i < seekhead->num_entries; i++) {
457 mkv_seekhead_entry *entry = &seekhead->entries[i];
458 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
461 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
462 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
463 put_ebml_id(dyn_cp, entry->elementid);
465 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
466 end_ebml_master(dyn_cp, seekentry);
468 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD);
470 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
471 put_ebml_void(pb, remaining);
473 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
479 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
480 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
482 mkv_cues *cues = &mkv->cues;
483 mkv_cuepoint *entries = cues->entries;
488 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
490 return AVERROR(ENOMEM);
491 cues->entries = entries;
493 cues->entries[cues->num_entries].pts = ts;
494 cues->entries[cues->num_entries].stream_idx = stream;
495 cues->entries[cues->num_entries].tracknum = tracknum;
496 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
497 cues->entries[cues->num_entries].relative_pos = relative_pos;
498 cues->entries[cues->num_entries++].duration = duration;
503 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
505 MatroskaMuxContext *mkv = s->priv_data;
506 AVIOContext *dyn_cp, *pb = s->pb, *cuepoint;
510 currentpos = avio_tell(pb);
511 ret = start_ebml_master_crc32(&dyn_cp, mkv);
515 ret = avio_open_dyn_buf(&cuepoint);
517 ffio_free_dyn_buf(&dyn_cp);
521 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
523 uint64_t pts = entry->pts;
527 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
529 // put all the entries from different tracks that have the exact same
530 // timestamp into the same CuePoint
531 for (int j = 0; j < num_tracks; j++)
532 tracks[j].has_cue = 0;
534 ebml_master track_positions;
535 int idx = entry->stream_idx;
537 av_assert0(idx >= 0 && idx < num_tracks);
538 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
540 tracks[idx].has_cue = 1;
541 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
542 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
543 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
544 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
545 if (entry->duration != -1)
546 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
547 end_ebml_master(cuepoint, track_positions);
548 } while (++entry < end && entry->pts == pts);
549 size = avio_get_dyn_buf(cuepoint, &buf);
550 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
551 ffio_reset_dyn_buf(cuepoint);
553 ffio_free_dyn_buf(&cuepoint);
554 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
559 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
561 const uint8_t *header_start[3];
563 int first_header_size;
566 if (par->codec_id == AV_CODEC_ID_VORBIS)
567 first_header_size = 30;
569 first_header_size = 42;
571 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
572 first_header_size, header_start, header_len) < 0) {
573 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
577 avio_w8(pb, 2); // number packets - 1
578 for (j = 0; j < 2; j++) {
579 put_xiph_size(pb, header_len[j]);
581 for (j = 0; j < 3; j++)
582 avio_write(pb, header_start[j], header_len[j]);
587 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
589 if (par->extradata && par->extradata_size == 2)
590 avio_write(pb, par->extradata, 2);
592 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
596 static int put_flac_codecpriv(AVFormatContext *s,
597 AVIOContext *pb, AVCodecParameters *par)
599 int write_comment = (par->channel_layout &&
600 !(par->channel_layout & ~0x3ffffULL) &&
601 !ff_flac_is_native_layout(par->channel_layout));
602 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
609 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
610 "Lavf" : LIBAVFORMAT_IDENT;
611 AVDictionary *dict = NULL;
612 uint8_t buf[32], *data, *p;
615 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
616 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
618 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
619 if (len >= ((1<<24) - 4)) {
621 return AVERROR(EINVAL);
624 data = av_malloc(len + 4);
627 return AVERROR(ENOMEM);
631 AV_WB24(data + 1, len);
634 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
636 avio_write(pb, data, len + 4);
645 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
646 int *sample_rate, int *output_sample_rate)
648 MPEG4AudioConfig mp4ac;
651 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
652 /* Don't abort if the failure is because of missing extradata. Assume in that
653 * case a bitstream filter will provide the muxer with the extradata in the
655 * Abort however if s->pb is not seekable, as we would not be able to seek back
656 * to write the sample rate elements once the extradata shows up, anyway. */
657 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
658 av_log(s, AV_LOG_ERROR,
659 "Error parsing AAC extradata, unable to determine samplerate.\n");
660 return AVERROR(EINVAL);
664 /* This will only happen when this function is called while writing the
665 * header and no extradata is available. The space for this element has
666 * to be reserved for when this function is called again after the
667 * extradata shows up in the first packet, as there's no way to know if
668 * output_sample_rate will be different than sample_rate or not. */
669 *output_sample_rate = *sample_rate;
671 *sample_rate = mp4ac.sample_rate;
672 *output_sample_rate = mp4ac.ext_sample_rate;
677 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
678 AVCodecParameters *par,
681 switch (par->codec_id) {
682 case AV_CODEC_ID_VORBIS:
683 case AV_CODEC_ID_THEORA:
684 return put_xiph_codecpriv(s, dyn_cp, par);
685 case AV_CODEC_ID_FLAC:
686 return put_flac_codecpriv(s, dyn_cp, par);
687 case AV_CODEC_ID_WAVPACK:
688 return put_wv_codecpriv(dyn_cp, par);
689 case AV_CODEC_ID_H264:
690 return ff_isom_write_avcc(dyn_cp, par->extradata,
691 par->extradata_size);
692 case AV_CODEC_ID_HEVC:
693 return ff_isom_write_hvcc(dyn_cp, par->extradata,
694 par->extradata_size, 0);
695 case AV_CODEC_ID_AV1:
696 if (par->extradata_size)
697 return ff_isom_write_av1c(dyn_cp, par->extradata,
698 par->extradata_size);
700 put_ebml_void(pb, 4 + 3);
702 case AV_CODEC_ID_ALAC:
703 if (par->extradata_size < 36) {
704 av_log(s, AV_LOG_ERROR,
705 "Invalid extradata found, ALAC expects a 36-byte "
707 return AVERROR_INVALIDDATA;
709 avio_write(dyn_cp, par->extradata + 12,
710 par->extradata_size - 12);
712 case AV_CODEC_ID_AAC:
713 if (par->extradata_size)
714 avio_write(dyn_cp, par->extradata, par->extradata_size);
716 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
719 if (par->codec_id == AV_CODEC_ID_PRORES &&
720 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
721 avio_wl32(dyn_cp, par->codec_tag);
722 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
723 avio_write(dyn_cp, par->extradata, par->extradata_size);
729 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
730 AVCodecParameters *par,
731 int native_id, int qt_id)
735 int ret, codecpriv_size;
737 ret = avio_open_dyn_buf(&dyn_cp);
742 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
743 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
746 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
748 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
749 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
752 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
753 avio_wl32(dyn_cp, par->codec_tag);
754 for(i = 0; i < 0x5a - 8; i++)
757 avio_write(dyn_cp, par->extradata, par->extradata_size);
759 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
760 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
761 avcodec_get_name(par->codec_id));
764 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
766 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
767 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
768 avcodec_get_name(par->codec_id));
769 ret = AVERROR(EINVAL);
772 ff_put_bmp_header(dyn_cp, par, 0, 0);
774 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
776 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
778 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
779 avcodec_get_name(par->codec_id));
780 ret = AVERROR(EINVAL);
783 par->codec_tag = tag;
785 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
788 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
790 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
792 ffio_free_dyn_buf(&dyn_cp);
796 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
798 uint8_t *colorinfo_ptr;
799 int side_data_size = 0;
800 int ret, colorinfo_size;
801 const uint8_t *side_data;
803 ret = avio_open_dyn_buf(&dyn_cp);
807 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
808 par->color_trc < AVCOL_TRC_NB) {
809 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
812 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
813 par->color_space < AVCOL_SPC_NB) {
814 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
816 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
817 par->color_primaries < AVCOL_PRI_NB) {
818 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
820 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
821 par->color_range < AVCOL_RANGE_NB) {
822 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
824 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
825 par->chroma_location <= AVCHROMA_LOC_TOP) {
828 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
829 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
830 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
833 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
835 if (side_data_size) {
836 const AVContentLightMetadata *metadata =
837 (const AVContentLightMetadata*)side_data;
838 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
839 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
842 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
844 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
845 ebml_master meta_element = start_ebml_master(
846 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
847 const AVMasteringDisplayMetadata *metadata =
848 (const AVMasteringDisplayMetadata*)side_data;
849 if (metadata->has_primaries) {
850 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
851 av_q2d(metadata->display_primaries[0][0]));
852 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
853 av_q2d(metadata->display_primaries[0][1]));
854 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
855 av_q2d(metadata->display_primaries[1][0]));
856 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
857 av_q2d(metadata->display_primaries[1][1]));
858 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
859 av_q2d(metadata->display_primaries[2][0]));
860 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
861 av_q2d(metadata->display_primaries[2][1]));
862 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
863 av_q2d(metadata->white_point[0]));
864 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
865 av_q2d(metadata->white_point[1]));
867 if (metadata->has_luminance) {
868 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
869 av_q2d(metadata->max_luminance));
870 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
871 av_q2d(metadata->min_luminance));
873 end_ebml_master(dyn_cp, meta_element);
876 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
877 if (colorinfo_size) {
878 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
879 avio_write(pb, colorinfo_ptr, colorinfo_size);
880 end_ebml_master(pb, colorinfo);
882 ffio_free_dyn_buf(&dyn_cp);
886 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
889 ebml_master projection;
890 int side_data_size = 0;
893 const AVSphericalMapping *spherical =
894 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
900 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
901 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
902 spherical->projection != AV_SPHERICAL_CUBEMAP) {
903 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
907 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
908 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
909 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
910 4 * (2 + 1 + 8) + (2 + 1 + 20));
912 switch (spherical->projection) {
913 case AV_SPHERICAL_EQUIRECTANGULAR:
914 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
915 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
917 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
918 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
919 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
920 AV_WB32(private, 0); // version + flags
921 AV_WB32(private + 4, spherical->bound_top);
922 AV_WB32(private + 8, spherical->bound_bottom);
923 AV_WB32(private + 12, spherical->bound_left);
924 AV_WB32(private + 16, spherical->bound_right);
925 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
928 case AV_SPHERICAL_CUBEMAP:
929 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
930 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
931 AV_WB32(private, 0); // version + flags
932 AV_WB32(private + 4, 0); // layout
933 AV_WB32(private + 8, spherical->padding);
934 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
942 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
943 (double) spherical->yaw / (1 << 16));
944 if (spherical->pitch)
945 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
946 (double) spherical->pitch / (1 << 16));
948 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
949 (double) spherical->roll / (1 << 16));
951 end_ebml_master(pb, projection);
956 static void mkv_write_field_order(AVIOContext *pb, int mode,
957 enum AVFieldOrder field_order)
959 switch (field_order) {
960 case AV_FIELD_UNKNOWN:
962 case AV_FIELD_PROGRESSIVE:
963 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
964 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
970 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
971 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
972 if (mode != MODE_WEBM) {
973 switch (field_order) {
975 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
976 MATROSKA_VIDEO_FIELDORDER_TT);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
980 MATROSKA_VIDEO_FIELDORDER_BB);
983 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
984 MATROSKA_VIDEO_FIELDORDER_TB);
987 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
988 MATROSKA_VIDEO_FIELDORDER_BT);
995 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
996 AVStream *st, int mode, int *h_width, int *h_height)
1000 AVDictionaryEntry *tag;
1001 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1005 // convert metadata into proper side data and add it to the stream
1006 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1007 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1008 int stereo_mode = atoi(tag->value);
1010 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1011 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1016 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1017 stereo_mode != 10 && stereo_mode != 12) {
1018 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1024 // iterate to find the stereo3d side data
1025 for (i = 0; i < st->nb_side_data; i++) {
1026 AVPacketSideData sd = st->side_data[i];
1027 if (sd.type == AV_PKT_DATA_STEREO3D) {
1028 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1030 switch (stereo->type) {
1031 case AV_STEREO3D_2D:
1032 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1034 case AV_STEREO3D_SIDEBYSIDE:
1035 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1036 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1037 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1040 case AV_STEREO3D_TOPBOTTOM:
1041 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1042 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1046 case AV_STEREO3D_CHECKERBOARD:
1047 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1048 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1051 case AV_STEREO3D_LINES:
1052 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1053 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1057 case AV_STEREO3D_COLUMNS:
1058 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1059 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1063 case AV_STEREO3D_FRAMESEQUENCE:
1064 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1065 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1073 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1076 // if webm, do not write unsupported modes
1077 if ((mode == MODE_WEBM &&
1078 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1079 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1080 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1081 av_log(s, AV_LOG_ERROR,
1082 "The specified stereo mode is not valid.\n");
1083 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1084 return AVERROR(EINVAL);
1087 // write StereoMode if format is valid
1088 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1093 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1094 int i, AVIOContext *pb, int default_stream_exists)
1096 AVStream *st = s->streams[i];
1097 AVCodecParameters *par = st->codecpar;
1098 ebml_master subinfo, track;
1101 int bit_depth = av_get_bits_per_sample(par->codec_id);
1102 int sample_rate = par->sample_rate;
1103 int output_sample_rate = 0;
1104 int display_width_div = 1;
1105 int display_height_div = 1;
1107 AVDictionaryEntry *tag;
1109 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1110 mkv->have_attachments = 1;
1114 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1115 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1116 if (par->bits_per_raw_sample)
1117 bit_depth = par->bits_per_raw_sample;
1119 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1122 bit_depth = par->bits_per_coded_sample;
1125 if (par->codec_id == AV_CODEC_ID_AAC) {
1126 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1127 &output_sample_rate);
1132 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1133 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1134 mkv->is_dash ? mkv->dash_track_number : i + 1);
1135 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1136 mkv->is_dash ? mkv->dash_track_number : i + 1);
1137 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1139 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1140 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1141 tag = av_dict_get(st->metadata, "language", NULL, 0);
1142 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1143 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1144 } else if (tag && tag->value) {
1145 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1148 // The default value for TRACKFLAGDEFAULT is 1, so add element
1149 // if we need to clear it.
1150 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1151 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1153 if (st->disposition & AV_DISPOSITION_FORCED)
1154 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1156 if (mkv->mode == MODE_WEBM) {
1157 const char *codec_id;
1158 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1159 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1160 if (ff_webm_codec_tags[j].id == par->codec_id) {
1161 codec_id = ff_webm_codec_tags[j].str;
1166 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1167 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1168 codec_id = "D_WEBVTT/CAPTIONS";
1169 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1170 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1171 codec_id = "D_WEBVTT/DESCRIPTIONS";
1172 native_id = MATROSKA_TRACK_TYPE_METADATA;
1173 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1174 codec_id = "D_WEBVTT/METADATA";
1175 native_id = MATROSKA_TRACK_TYPE_METADATA;
1177 codec_id = "D_WEBVTT/SUBTITLES";
1178 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1183 av_log(s, AV_LOG_ERROR,
1184 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1185 return AVERROR(EINVAL);
1188 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1190 // look for a codec ID string specific to mkv to use,
1191 // if none are found, use AVI codes
1192 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1193 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1194 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1195 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1201 if (mkv->allow_raw_vfw) {
1204 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1205 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1206 return AVERROR(EINVAL);
1211 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1212 int64_t codecdelay = av_rescale_q(par->initial_padding,
1213 (AVRational){ 1, 48000 },
1214 (AVRational){ 1, 1000000000 });
1215 if (codecdelay < 0) {
1216 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1217 return AVERROR(EINVAL);
1219 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1220 // (AVRational){ 1, par->sample_rate },
1223 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1225 if (par->codec_id == AV_CODEC_ID_OPUS) {
1226 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1229 switch (par->codec_type) {
1230 case AVMEDIA_TYPE_VIDEO:
1231 mkv->have_video = 1;
1232 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1234 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1235 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1236 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1237 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1238 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1239 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1242 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1243 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1244 par->codec_id == AV_CODEC_ID_SVQ1 ||
1245 par->codec_id == AV_CODEC_ID_SVQ3 ||
1246 par->codec_id == AV_CODEC_ID_CINEPAK))
1250 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1251 else if (!native_id) {
1252 // if there is no mkv-specific codec ID, use VFW mode
1253 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1254 mkv->tracks[i].write_dts = 1;
1255 s->internal->avoid_negative_ts_use_pts = 0;
1258 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1260 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1261 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1263 mkv_write_field_order(pb, mkv->mode, par->field_order);
1265 // check both side data and metadata for stereo information,
1266 // write the result to the bitstream if any is found
1267 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1269 &display_height_div);
1273 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1274 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1275 (par->format == AV_PIX_FMT_YUVA420P)) {
1276 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1279 // write DisplayWidth and DisplayHeight, they contain the size of
1280 // a single source view and/or the display aspect ratio
1281 if (st->sample_aspect_ratio.num) {
1282 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1283 if (d_width > INT_MAX) {
1284 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1285 return AVERROR(EINVAL);
1287 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1288 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1289 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1290 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1292 AVRational display_aspect_ratio;
1293 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1294 par->width * (int64_t)st->sample_aspect_ratio.num,
1295 par->height * (int64_t)st->sample_aspect_ratio.den,
1297 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1298 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1299 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1302 } else if (display_width_div != 1 || display_height_div != 1) {
1303 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1304 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1305 } else if (mkv->mode != MODE_WEBM)
1306 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1308 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1309 uint32_t color_space = av_le2ne32(par->codec_tag);
1310 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1312 ret = mkv_write_video_color(pb, par, st);
1315 ret = mkv_write_video_projection(s, pb, st);
1318 end_ebml_master(pb, subinfo);
1321 case AVMEDIA_TYPE_AUDIO:
1322 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1325 // no mkv-specific ID, use ACM mode
1326 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1328 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1329 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1331 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1332 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1333 if (output_sample_rate)
1334 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1336 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1337 end_ebml_master(pb, subinfo);
1340 case AVMEDIA_TYPE_SUBTITLE:
1342 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1343 return AVERROR(ENOSYS);
1346 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1347 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1349 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1352 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1353 return AVERROR(EINVAL);
1356 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1357 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1358 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1363 end_ebml_master(pb, track);
1368 static int mkv_write_tracks(AVFormatContext *s)
1370 MatroskaMuxContext *mkv = s->priv_data;
1371 AVIOContext *pb = s->pb;
1372 int i, ret, default_stream_exists = 0;
1374 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1376 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1380 for (i = 0; i < s->nb_streams; i++) {
1381 AVStream *st = s->streams[i];
1382 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1384 for (i = 0; i < s->nb_streams; i++) {
1385 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1390 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1391 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv,
1392 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1394 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1399 static int mkv_write_chapters(AVFormatContext *s)
1401 MatroskaMuxContext *mkv = s->priv_data;
1402 AVIOContext *dyn_cp, *pb = s->pb;
1403 ebml_master editionentry;
1404 AVRational scale = {1, 1E9};
1407 if (!s->nb_chapters || mkv->wrote_chapters)
1410 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1412 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1413 if (ret < 0) return ret;
1415 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1416 if (mkv->mode != MODE_WEBM) {
1417 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1418 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1420 for (i = 0; i < s->nb_chapters; i++) {
1421 ebml_master chapteratom, chapterdisplay;
1422 AVChapter *c = s->chapters[i];
1423 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1424 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1425 AVDictionaryEntry *t = NULL;
1426 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1427 av_log(s, AV_LOG_ERROR,
1428 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1429 chapterstart, chapterend);
1430 return AVERROR_INVALIDDATA;
1433 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1434 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1435 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1436 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1437 if (mkv->mode != MODE_WEBM) {
1438 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1439 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1441 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1442 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1443 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1444 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1445 end_ebml_master(dyn_cp, chapterdisplay);
1447 end_ebml_master(dyn_cp, chapteratom);
1449 end_ebml_master(dyn_cp, editionentry);
1450 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1452 mkv->wrote_chapters = 1;
1456 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1458 uint8_t *key = av_strdup(t->key);
1460 const uint8_t *lang = NULL;
1464 return AVERROR(ENOMEM);
1466 if ((p = strrchr(p, '-')) &&
1467 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1474 else if (*p >= 'a' && *p <= 'z')
1479 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1480 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1482 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1483 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1484 end_ebml_master(pb, tag);
1490 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1491 unsigned int uid, ebml_master *tag)
1494 MatroskaMuxContext *mkv = s->priv_data;
1495 ebml_master targets;
1498 if (!mkv->tags_bc) {
1499 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1501 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1507 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1508 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1510 put_ebml_uint(pb, elementid, uid);
1511 end_ebml_master(pb, targets);
1515 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1517 return av_strcasecmp(name, "title") &&
1518 av_strcasecmp(name, "stereo_mode") &&
1519 av_strcasecmp(name, "creation_time") &&
1520 av_strcasecmp(name, "encoding_tool") &&
1521 av_strcasecmp(name, "duration") &&
1522 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1523 av_strcasecmp(name, "language")) &&
1524 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1525 (av_strcasecmp(name, "filename") &&
1526 av_strcasecmp(name, "mimetype")));
1529 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1532 MatroskaMuxContext *mkv = s->priv_data;
1535 AVDictionaryEntry *t = NULL;
1537 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1541 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1542 if (mkv_check_tag_name(t->key, elementid)) {
1543 ret = mkv_write_simpletag(mkv->tags_bc, t);
1549 end_ebml_master(mkv->tags_bc, tag);
1553 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1555 AVDictionaryEntry *t = NULL;
1557 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1558 if (mkv_check_tag_name(t->key, elementid))
1564 static int mkv_write_tags(AVFormatContext *s)
1566 MatroskaMuxContext *mkv = s->priv_data;
1569 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1571 if (mkv_check_tag(s->metadata, 0)) {
1572 ret = mkv_write_tag(s, s->metadata, 0, 0);
1573 if (ret < 0) return ret;
1576 for (i = 0; i < s->nb_streams; i++) {
1577 AVStream *st = s->streams[i];
1579 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1582 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1585 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1586 if (ret < 0) return ret;
1589 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1590 for (i = 0; i < s->nb_streams; i++) {
1592 AVStream *st = s->streams[i];
1593 ebml_master tag_target;
1596 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1599 ret = mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID,
1600 i + 1, &tag_target);
1605 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1606 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1607 mkv->tracks[i].duration_offset = avio_tell(pb);
1609 // Reserve space to write duration as a 20-byte string.
1610 // 2 (ebml id) + 1 (data size) + 20 (data)
1611 put_ebml_void(pb, 23);
1612 end_ebml_master(pb, tag);
1613 end_ebml_master(pb, tag_target);
1617 if (mkv->mode != MODE_WEBM) {
1618 for (i = 0; i < s->nb_chapters; i++) {
1619 AVChapter *ch = s->chapters[i];
1621 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1624 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1630 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1631 for (i = 0; i < mkv->attachments->num_entries; i++) {
1632 mkv_attachment *attachment = &mkv->attachments->entries[i];
1633 AVStream *st = s->streams[attachment->stream_idx];
1635 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1638 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1645 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1646 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv,
1647 MATROSKA_ID_TAGS, &mkv->tags_pos);
1649 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1654 static int mkv_write_attachments(AVFormatContext *s)
1656 MatroskaMuxContext *mkv = s->priv_data;
1657 AVIOContext *dyn_cp, *pb = s->pb;
1661 if (!mkv->have_attachments)
1664 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1665 if (!mkv->attachments)
1666 return AVERROR(ENOMEM);
1668 av_lfg_init(&c, av_get_random_seed());
1670 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1672 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1673 if (ret < 0) return ret;
1675 for (i = 0; i < s->nb_streams; i++) {
1676 AVStream *st = s->streams[i];
1677 ebml_master attached_file;
1678 mkv_attachment *attachment = mkv->attachments->entries;
1679 AVDictionaryEntry *t;
1680 const char *mimetype = NULL;
1683 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1686 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1688 return AVERROR(ENOMEM);
1689 mkv->attachments->entries = attachment;
1691 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1693 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1694 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1695 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1696 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1697 return AVERROR(EINVAL);
1699 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1700 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1701 mimetype = t->value;
1702 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1704 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1705 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1706 mimetype = ff_mkv_mime_tags[i].str;
1709 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1710 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1711 mimetype = ff_mkv_image_mime_tags[i].str;
1716 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1717 "it cannot be deduced from the codec id.\n", i);
1718 return AVERROR(EINVAL);
1721 if (s->flags & AVFMT_FLAG_BITEXACT) {
1722 struct AVSHA *sha = av_sha_alloc();
1725 return AVERROR(ENOMEM);
1726 av_sha_init(sha, 160);
1727 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1728 av_sha_final(sha, digest);
1730 fileuid = AV_RL32(digest);
1732 fileuid = av_lfg_get(&c);
1734 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1735 fileuid, mkv->attachments->num_entries);
1737 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1738 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1739 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1740 end_ebml_master(dyn_cp, attached_file);
1742 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1743 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1745 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1750 static int64_t get_metadata_duration(AVFormatContext *s)
1756 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1757 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1758 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1762 for (i = 0; i < s->nb_streams; i++) {
1764 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1766 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1767 max = FFMAX(max, us);
1770 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1774 static int mkv_write_header(AVFormatContext *s)
1776 MatroskaMuxContext *mkv = s->priv_data;
1777 AVIOContext *pb = s->pb;
1778 ebml_master ebml_header;
1779 AVDictionaryEntry *tag;
1780 int ret, i, version = 2;
1781 int64_t creation_time;
1783 if (!strcmp(s->oformat->name, "webm")) {
1784 mkv->mode = MODE_WEBM;
1787 mkv->mode = MODE_MATROSKAv2;
1789 if (mkv->mode != MODE_WEBM ||
1790 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1791 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1794 for (i = 0; i < s->nb_streams; i++) {
1795 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1796 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1797 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1801 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1803 return AVERROR(ENOMEM);
1805 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1806 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1807 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1808 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1809 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1810 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1811 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1812 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1813 end_ebml_master(pb, ebml_header);
1815 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1816 mkv->segment_offset = avio_tell(pb);
1818 // we write a seek head at the beginning to point to all other level
1819 // one elements (except Clusters).
1820 mkv_start_seekhead(mkv, pb);
1822 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1824 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1829 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1830 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1831 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1832 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1833 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1834 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1835 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1837 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1839 if (mkv->mode != MODE_WEBM) {
1840 uint32_t segment_uid[4];
1843 av_lfg_init(&lfg, av_get_random_seed());
1845 for (i = 0; i < 4; i++)
1846 segment_uid[i] = av_lfg_get(&lfg);
1848 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1851 const char *ident = "Lavf";
1852 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1853 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1856 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1857 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1858 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1859 uint8_t date_utc_buf[8];
1860 AV_WB64(date_utc_buf, date_utc);
1861 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1864 // reserve space for the duration
1866 mkv->duration_offset = avio_tell(pb);
1867 if (!mkv->is_live) {
1868 int64_t metadata_duration = get_metadata_duration(s);
1870 if (s->duration > 0) {
1871 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1872 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1873 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1874 } else if (metadata_duration > 0) {
1875 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1876 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1877 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1879 put_ebml_void(pb, 11); // assumes double-precision float to be written
1882 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1883 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv,
1884 MATROSKA_ID_INFO, &mkv->info_pos);
1886 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1889 ret = mkv_write_tracks(s);
1893 for (i = 0; i < s->nb_chapters; i++)
1894 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1896 ret = mkv_write_chapters(s);
1900 if (mkv->mode != MODE_WEBM) {
1901 ret = mkv_write_attachments(s);
1906 ret = mkv_write_tags(s);
1910 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1911 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1916 if (s->metadata_header_padding > 0) {
1917 if (s->metadata_header_padding == 1)
1918 s->metadata_header_padding++;
1919 put_ebml_void(pb, s->metadata_header_padding);
1922 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1923 mkv->cues_pos = avio_tell(pb);
1924 if (mkv->reserve_cues_space == 1)
1925 mkv->reserve_cues_space++;
1926 put_ebml_void(pb, mkv->reserve_cues_space);
1929 av_init_packet(&mkv->cur_audio_pkt);
1930 mkv->cur_audio_pkt.size = 0;
1931 mkv->cluster_pos = -1;
1933 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1934 // after 4k and on a keyframe
1935 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1936 if (mkv->cluster_time_limit < 0)
1937 mkv->cluster_time_limit = 5000;
1938 if (mkv->cluster_size_limit < 0)
1939 mkv->cluster_size_limit = 5 * 1024 * 1024;
1941 if (mkv->cluster_time_limit < 0)
1942 mkv->cluster_time_limit = 1000;
1943 if (mkv->cluster_size_limit < 0)
1944 mkv->cluster_size_limit = 32 * 1024;
1950 static int mkv_blockgroup_size(int pkt_size)
1952 int size = pkt_size + 4;
1953 size += ebml_num_size(size);
1954 size += 2; // EBML ID for block and block duration
1955 size += 9; // max size of block duration incl. length field
1959 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1966 dst = av_malloc(srclen);
1968 return AVERROR(ENOMEM);
1970 while (srclen >= WV_HEADER_SIZE) {
1973 ret = ff_wv_parse_header(&header, src);
1976 src += WV_HEADER_SIZE;
1977 srclen -= WV_HEADER_SIZE;
1979 if (srclen < header.blocksize) {
1980 ret = AVERROR_INVALIDDATA;
1984 if (header.initial) {
1985 AV_WL32(dst + offset, header.samples);
1988 AV_WL32(dst + offset, header.flags);
1989 AV_WL32(dst + offset + 4, header.crc);
1992 if (!(header.initial && header.final)) {
1993 AV_WL32(dst + offset, header.blocksize);
1997 memcpy(dst + offset, src, header.blocksize);
1998 src += header.blocksize;
1999 srclen -= header.blocksize;
2000 offset += header.blocksize;
2012 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2013 uint32_t blockid, AVPacket *pkt, int keyframe)
2015 MatroskaMuxContext *mkv = s->priv_data;
2016 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2017 mkv_track *track = &mkv->tracks[pkt->stream_index];
2018 uint8_t *data = NULL, *side_data = NULL;
2019 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2020 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2021 uint64_t additional_id = 0;
2022 int64_t discard_padding = 0;
2023 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2024 ebml_master block_group, block_additions, block_more;
2026 ts += track->ts_offset;
2028 /* The following string is identical to the one in mkv_write_vtt_blocks
2029 * so that only one copy needs to exist in binaries. */
2030 av_log(s, AV_LOG_DEBUG,
2031 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2032 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2033 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2034 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2035 mkv->cluster_pos, track_number, keyframe != 0);
2037 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2038 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2039 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2040 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2041 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2042 /* extradata is Annex B, assume the bitstream is too and convert it */
2043 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2044 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2045 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2046 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2047 err = mkv_strip_wavpack(pkt->data, &data, &size);
2052 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2053 "a packet from stream %d.\n", pkt->stream_index);
2057 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2058 /* Matroska specification requires to remove the first QuickTime atom
2064 side_data = av_packet_get_side_data(pkt,
2065 AV_PKT_DATA_SKIP_SAMPLES,
2067 if (side_data && side_data_size >= 10) {
2068 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2069 (AVRational){1, par->sample_rate},
2070 (AVRational){1, 1000000000});
2073 side_data = av_packet_get_side_data(pkt,
2074 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2077 if (side_data_size < 8) {
2080 additional_id = AV_RB64(side_data);
2082 side_data_size -= 8;
2086 if ((side_data_size && additional_id == 1) || discard_padding) {
2087 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2088 blockid = MATROSKA_ID_BLOCK;
2091 put_ebml_id(pb, blockid);
2092 put_ebml_num(pb, size + 4, 0);
2093 // this assumes stream_index is less than 126
2094 avio_w8(pb, 0x80 | track_number);
2095 avio_wb16(pb, ts - mkv->cluster_pts);
2096 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2097 avio_write(pb, data + offset, size);
2098 if (data != pkt->data)
2101 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2102 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2104 track->last_timestamp = ts;
2106 if (discard_padding) {
2107 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2110 if (side_data_size && additional_id == 1) {
2111 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2112 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2113 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2114 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2115 put_ebml_num(pb, side_data_size, 0);
2116 avio_write(pb, side_data, side_data_size);
2117 end_ebml_master(pb, block_more);
2118 end_ebml_master(pb, block_additions);
2120 if ((side_data_size && additional_id == 1) || discard_padding) {
2121 end_ebml_master(pb, block_group);
2127 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2129 MatroskaMuxContext *mkv = s->priv_data;
2130 ebml_master blockgroup;
2131 int id_size, settings_size, size;
2132 uint8_t *id, *settings;
2133 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2134 const int flags = 0;
2137 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2141 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2144 size = id_size + 1 + settings_size + 1 + pkt->size;
2146 /* The following string is identical to the one in mkv_write_block so that
2147 * only one copy needs to exist in binaries. */
2148 av_log(s, AV_LOG_DEBUG,
2149 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2150 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2151 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2152 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2153 mkv->cluster_pos, pkt->stream_index + 1, 1);
2155 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2157 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2158 put_ebml_num(pb, size + 4, 0);
2159 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2160 avio_wb16(pb, ts - mkv->cluster_pts);
2162 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2164 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2165 end_ebml_master(pb, blockgroup);
2167 return pkt->duration;
2170 static void mkv_end_cluster(AVFormatContext *s)
2172 MatroskaMuxContext *mkv = s->priv_data;
2174 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2175 mkv->cluster_pos = -1;
2176 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2179 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2181 MatroskaMuxContext *mkv = s->priv_data;
2182 mkv_track *track = &mkv->tracks[pkt->stream_index];
2183 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2185 int side_data_size = 0, ret;
2187 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2190 switch (par->codec_id) {
2191 case AV_CODEC_ID_AAC:
2192 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2193 int filler, output_sample_rate = 0;
2195 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2196 &output_sample_rate);
2199 if (!output_sample_rate)
2200 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2201 ret = ff_alloc_extradata(par, side_data_size);
2204 memcpy(par->extradata, side_data, side_data_size);
2205 curpos = avio_tell(mkv->tracks_bc);
2206 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2207 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2208 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2210 put_ebml_void(mkv->tracks_bc, filler);
2211 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2212 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2213 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2214 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2215 } else if (!par->extradata_size && !track->sample_rate) {
2216 // No extradata (codecpar or packet side data).
2217 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2218 return AVERROR(EINVAL);
2221 case AV_CODEC_ID_FLAC:
2222 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2223 AVCodecParameters *codecpriv_par;
2225 if (side_data_size != par->extradata_size) {
2226 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2228 return AVERROR(EINVAL);
2230 codecpriv_par = avcodec_parameters_alloc();
2232 return AVERROR(ENOMEM);
2233 ret = avcodec_parameters_copy(codecpriv_par, par);
2235 avcodec_parameters_free(&codecpriv_par);
2238 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2239 curpos = avio_tell(mkv->tracks_bc);
2240 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2241 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2242 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2243 avcodec_parameters_free(&codecpriv_par);
2246 // FIXME: Remove the following once libaom starts propagating extradata during init()
2247 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2248 case AV_CODEC_ID_AV1:
2249 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2250 !par->extradata_size) {
2251 AVIOContext *dyn_cp;
2255 ret = avio_open_dyn_buf(&dyn_cp);
2258 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2259 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2260 if (!codecpriv_size) {
2262 return AVERROR_INVALIDDATA;
2264 curpos = avio_tell(mkv->tracks_bc);
2265 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2266 // Do not write the OBUs as we don't have space saved for them
2267 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2269 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2270 ret = ff_alloc_extradata(par, side_data_size);
2273 memcpy(par->extradata, side_data, side_data_size);
2274 } else if (!par->extradata_size)
2275 return AVERROR_INVALIDDATA;
2279 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2286 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2288 MatroskaMuxContext *mkv = s->priv_data;
2290 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2291 mkv_track *track = &mkv->tracks[pkt->stream_index];
2292 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2293 int duration = pkt->duration;
2295 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2296 int64_t relative_packet_pos;
2297 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2299 if (ts == AV_NOPTS_VALUE) {
2300 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2301 return AVERROR(EINVAL);
2303 ts += track->ts_offset;
2305 if (mkv->cluster_pos != -1) {
2306 int64_t cluster_time = ts - mkv->cluster_pts;
2307 if ((int16_t)cluster_time != cluster_time) {
2309 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2313 if (mkv->cluster_pos == -1) {
2314 mkv->cluster_pos = avio_tell(s->pb);
2315 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2318 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2319 mkv->cluster_pts = FFMAX(0, ts);
2320 av_log(s, AV_LOG_DEBUG,
2321 "Starting new cluster with timestamp "
2322 "%" PRId64 " at offset %" PRId64 " bytes\n",
2323 mkv->cluster_pts, mkv->cluster_pos);
2325 pb = mkv->cluster_bc;
2327 relative_packet_pos = avio_tell(pb);
2329 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2330 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2333 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2334 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2335 mkv->cluster_pos, relative_packet_pos, -1);
2336 if (ret < 0) return ret;
2339 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2340 duration = mkv_write_vtt_blocks(s, pb, pkt);
2342 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2343 mkv_blockgroup_size(pkt->size));
2345 #if FF_API_CONVERGENCE_DURATION
2346 FF_DISABLE_DEPRECATION_WARNINGS
2347 /* For backward compatibility, prefer convergence_duration. */
2348 if (pkt->convergence_duration > 0) {
2349 duration = pkt->convergence_duration;
2351 FF_ENABLE_DEPRECATION_WARNINGS
2353 /* All subtitle blocks are considered to be keyframes. */
2354 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2355 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2356 end_ebml_master(pb, blockgroup);
2359 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2360 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2361 mkv->cluster_pos, relative_packet_pos, duration);
2367 mkv->duration = FFMAX(mkv->duration, ts + duration);
2368 track->duration = FFMAX(track->duration, ts + duration);
2373 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2375 MatroskaMuxContext *mkv = s->priv_data;
2376 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2377 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2379 int64_t cluster_time;
2381 int start_new_cluster;
2383 ret = mkv_check_new_extra_data(s, pkt);
2387 if (mkv->tracks[pkt->stream_index].write_dts)
2388 cluster_time = pkt->dts - mkv->cluster_pts;
2390 cluster_time = pkt->pts - mkv->cluster_pts;
2391 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2393 cluster_size = avio_tell(mkv->cluster_bc);
2395 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2396 // WebM DASH specification states that the first block of every cluster
2397 // has to be a key frame. So for DASH video, we only create a cluster
2398 // on seeing key frames.
2399 start_new_cluster = keyframe;
2400 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2401 (mkv->cluster_pos == -1 ||
2402 cluster_time > mkv->cluster_time_limit)) {
2403 // For DASH audio, we create a Cluster based on cluster_time_limit
2404 start_new_cluster = 1;
2405 } else if (!mkv->is_dash &&
2406 (cluster_size > mkv->cluster_size_limit ||
2407 cluster_time > mkv->cluster_time_limit ||
2408 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2409 cluster_size > 4 * 1024))) {
2410 start_new_cluster = 1;
2412 start_new_cluster = 0;
2415 if (mkv->cluster_pos != -1 && start_new_cluster) {
2419 if (!mkv->cluster_pos)
2420 avio_write_marker(s->pb,
2421 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2422 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2424 // check if we have an audio packet cached
2425 if (mkv->cur_audio_pkt.size > 0) {
2426 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2427 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2428 mkv->is_dash ? start_new_cluster : 0);
2429 av_packet_unref(&mkv->cur_audio_pkt);
2431 av_log(s, AV_LOG_ERROR,
2432 "Could not write cached audio packet ret:%d\n", ret);
2437 // buffer an audio packet to ensure the packet containing the video
2438 // keyframe's timecode is contained in the same cluster for WebM
2439 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2441 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2443 ret = mkv_write_packet_internal(s, pkt, 0);
2447 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2449 MatroskaMuxContext *mkv = s->priv_data;
2452 if (mkv->cluster_pos != -1) {
2454 av_log(s, AV_LOG_DEBUG,
2455 "Flushing cluster at offset %" PRIu64 " bytes\n",
2460 return mkv_write_packet(s, pkt);
2463 static int mkv_write_trailer(AVFormatContext *s)
2465 MatroskaMuxContext *mkv = s->priv_data;
2466 AVIOContext *pb = s->pb;
2467 int64_t currentpos, cuespos;
2470 // check if we have an audio packet cached
2471 if (mkv->cur_audio_pkt.size > 0) {
2472 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2474 av_log(s, AV_LOG_ERROR,
2475 "Could not write cached audio packet ret:%d\n", ret);
2480 if (mkv->cluster_bc) {
2481 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2484 ret = mkv_write_chapters(s);
2489 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2490 if (mkv->cues.num_entries) {
2491 if (mkv->reserve_cues_space) {
2494 currentpos = avio_tell(pb);
2495 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2497 cuespos = mkv_write_cues(s, &mkv->cues, mkv->tracks, s->nb_streams);
2498 cues_end = avio_tell(pb);
2499 if (cues_end > cuespos + mkv->reserve_cues_space) {
2500 av_log(s, AV_LOG_ERROR,
2501 "Insufficient space reserved for cues: %d "
2502 "(needed: %" PRId64 ").\n",
2503 mkv->reserve_cues_space, cues_end - cuespos);
2504 return AVERROR(EINVAL);
2507 if (cues_end < cuespos + mkv->reserve_cues_space)
2508 put_ebml_void(pb, mkv->reserve_cues_space -
2509 (cues_end - cuespos));
2511 avio_seek(pb, currentpos, SEEK_SET);
2513 cuespos = mkv_write_cues(s, &mkv->cues, mkv->tracks, s->nb_streams);
2516 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2519 currentpos = avio_tell(pb);
2521 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2525 // update the duration
2526 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2527 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2528 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2529 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
2531 // write tracks master
2532 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2533 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
2535 // update stream durations
2536 if (!mkv->is_live) {
2538 int64_t curr = avio_tell(mkv->tags_bc);
2539 for (i = 0; i < s->nb_streams; ++i) {
2540 AVStream *st = s->streams[i];
2541 mkv_track *track = &mkv->tracks[i];
2543 if (track->duration_offset > 0) {
2544 double duration_sec = track->duration * av_q2d(st->time_base);
2545 char duration_string[20] = "";
2547 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2550 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2552 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2553 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2554 fmod(duration_sec, 60));
2556 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2559 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2561 if (mkv->tags_bc && !mkv->is_live) {
2562 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2563 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
2566 avio_seek(pb, currentpos, SEEK_SET);
2569 if (!mkv->is_live) {
2570 end_ebml_master(pb, mkv->segment);
2576 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2579 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2580 if (ff_mkv_codec_tags[i].id == codec_id)
2583 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2584 enum AVMediaType type = avcodec_get_type(codec_id);
2585 // mkv theoretically supports any video/audio through VFW/ACM
2586 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2593 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2596 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2597 if (ff_webm_codec_tags[i].id == codec_id)
2603 static int mkv_init(struct AVFormatContext *s)
2607 if (s->nb_streams > MAX_TRACKS) {
2608 av_log(s, AV_LOG_ERROR,
2609 "At most %d streams are supported for muxing in Matroska\n",
2611 return AVERROR(EINVAL);
2614 for (i = 0; i < s->nb_streams; i++) {
2615 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2616 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2617 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2618 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2619 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2620 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2621 av_log(s, AV_LOG_ERROR,
2622 "The Matroska muxer does not yet support muxing %s\n",
2623 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2624 return AVERROR_PATCHWELCOME;
2628 if (s->avoid_negative_ts < 0) {
2629 s->avoid_negative_ts = 1;
2630 s->internal->avoid_negative_ts_use_pts = 1;
2633 for (i = 0; i < s->nb_streams; i++) {
2634 // ms precision is the de-facto standard timescale for mkv files
2635 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2641 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2644 AVStream *st = s->streams[pkt->stream_index];
2646 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2647 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2648 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2649 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2650 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2656 static const AVCodecTag additional_audio_tags[] = {
2657 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2658 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2659 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2660 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2661 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2662 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2663 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2664 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2665 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2666 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2667 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2668 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2669 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2672 static const AVCodecTag additional_video_tags[] = {
2673 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2674 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2675 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2676 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2679 static const AVCodecTag additional_subtitle_tags[] = {
2680 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2681 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2682 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2683 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2686 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2687 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2688 static const AVOption options[] = {
2689 { "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 },
2690 { "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 },
2691 { "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 },
2692 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2693 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2694 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2695 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2696 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2700 #if CONFIG_MATROSKA_MUXER
2701 static const AVClass matroska_class = {
2702 .class_name = "matroska muxer",
2703 .item_name = av_default_item_name,
2705 .version = LIBAVUTIL_VERSION_INT,
2708 AVOutputFormat ff_matroska_muxer = {
2710 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2711 .mime_type = "video/x-matroska",
2712 .extensions = "mkv",
2713 .priv_data_size = sizeof(MatroskaMuxContext),
2714 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2715 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2716 .video_codec = CONFIG_LIBX264_ENCODER ?
2717 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2719 .deinit = mkv_deinit,
2720 .write_header = mkv_write_header,
2721 .write_packet = mkv_write_flush_packet,
2722 .write_trailer = mkv_write_trailer,
2723 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2724 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2725 .codec_tag = (const AVCodecTag* const []){
2726 ff_codec_bmp_tags, ff_codec_wav_tags,
2727 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2729 .subtitle_codec = AV_CODEC_ID_ASS,
2730 .query_codec = mkv_query_codec,
2731 .check_bitstream = mkv_check_bitstream,
2732 .priv_class = &matroska_class,
2736 #if CONFIG_WEBM_MUXER
2737 static const AVClass webm_class = {
2738 .class_name = "webm muxer",
2739 .item_name = av_default_item_name,
2741 .version = LIBAVUTIL_VERSION_INT,
2744 AVOutputFormat ff_webm_muxer = {
2746 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2747 .mime_type = "video/webm",
2748 .extensions = "webm",
2749 .priv_data_size = sizeof(MatroskaMuxContext),
2750 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2751 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2752 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2754 .deinit = mkv_deinit,
2755 .write_header = mkv_write_header,
2756 .write_packet = mkv_write_flush_packet,
2757 .write_trailer = mkv_write_trailer,
2758 .query_codec = webm_query_codec,
2759 .check_bitstream = mkv_check_bitstream,
2760 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2761 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2762 .priv_class = &webm_class,
2766 #if CONFIG_MATROSKA_AUDIO_MUXER
2767 static const AVClass mka_class = {
2768 .class_name = "matroska audio muxer",
2769 .item_name = av_default_item_name,
2771 .version = LIBAVUTIL_VERSION_INT,
2773 AVOutputFormat ff_matroska_audio_muxer = {
2775 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2776 .mime_type = "audio/x-matroska",
2777 .extensions = "mka",
2778 .priv_data_size = sizeof(MatroskaMuxContext),
2779 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2780 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2781 .video_codec = AV_CODEC_ID_NONE,
2783 .deinit = mkv_deinit,
2784 .write_header = mkv_write_header,
2785 .write_packet = mkv_write_flush_packet,
2786 .write_trailer = mkv_write_trailer,
2787 .check_bitstream = mkv_check_bitstream,
2788 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2790 .codec_tag = (const AVCodecTag* const []){
2791 ff_codec_wav_tags, additional_audio_tags, 0
2793 .priv_class = &mka_class,