3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/stereo3d.h"
54 #include "libavcodec/xiph.h"
55 #include "libavcodec/mpeg4audio.h"
57 /* Level 1 elements we create a SeekHead entry for:
58 * Info, Tracks, Chapters, Attachments, Tags and Cues */
59 #define MAX_SEEKHEAD_ENTRIES 6
61 typedef struct ebml_master {
62 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
63 int sizebytes; ///< how many bytes were reserved for the size
66 typedef struct mkv_seekhead_entry {
71 typedef struct mkv_seekhead {
73 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
78 typedef struct mkv_cuepoint {
82 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
83 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
84 int64_t duration; ///< duration of the block according to time base
87 typedef struct mkv_cues {
88 mkv_cuepoint *entries;
92 typedef struct mkv_track {
97 int64_t sample_rate_offset;
98 int64_t last_timestamp;
100 int64_t duration_offset;
101 int64_t codecpriv_offset;
105 #define MODE_MATROSKAv2 0x01
106 #define MODE_WEBM 0x02
108 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
109 * range 1 to 126 (inclusive) */
110 #define MAX_TRACKS 126
112 typedef struct MatroskaMuxContext {
113 const AVClass *class;
115 AVIOContext *tags_bc;
117 AVIOContext *info_bc;
119 AVIOContext *tracks_bc;
122 int64_t segment_offset;
123 AVIOContext *cluster_bc;
124 int64_t cluster_pos; ///< file offset of the current cluster
126 int64_t duration_offset;
128 mkv_seekhead seekhead;
132 AVPacket cur_audio_pkt;
134 int have_attachments;
137 int reserve_cues_space;
138 int cluster_size_limit;
140 int64_t cluster_time_limit;
142 int dash_track_number;
146 uint32_t chapter_id_offset;
151 uint32_t segment_uid[4];
152 } MatroskaMuxContext;
154 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
155 * 8 byte for "matroska" doctype string */
156 #define MAX_EBML_HEADER_SIZE 35
158 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
159 * offset, 4 bytes for target EBML ID */
160 #define MAX_SEEKENTRY_SIZE 21
162 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
163 #define MAX_CUETRACKPOS_SIZE 40
165 /** Seek preroll value for opus */
166 #define OPUS_SEEK_PREROLL 80000000
168 static int ebml_id_size(uint32_t id)
170 return (av_log2(id) + 7U) / 8;
173 static void put_ebml_id(AVIOContext *pb, uint32_t id)
175 int i = ebml_id_size(id);
177 avio_w8(pb, (uint8_t)(id >> (i * 8)));
181 * Write an EBML size meaning "unknown size".
183 * @param bytes The number of bytes the size should occupy (maximum: 8).
185 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
187 av_assert0(bytes <= 8);
188 avio_w8(pb, 0x1ff >> bytes);
189 ffio_fill(pb, 0xff, bytes - 1);
193 * Calculate how many bytes are needed to represent a given number in EBML.
195 static int ebml_num_size(uint64_t num)
198 while ((num + 1) >> bytes * 7)
204 * Write a number in EBML variable length format.
206 * @param bytes The number of bytes that need to be used to write the number.
207 * If zero, the minimal number of bytes will be used.
209 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
211 int i, needed_bytes = ebml_num_size(num);
213 // sizes larger than this are currently undefined in EBML
214 av_assert0(num < (1ULL << 56) - 1);
217 bytes = needed_bytes;
218 // The bytes needed to write the given size must not exceed
219 // the bytes that we ought to use.
220 av_assert0(bytes >= needed_bytes);
222 num |= 1ULL << bytes * 7;
223 for (i = bytes - 1; i >= 0; i--)
224 avio_w8(pb, (uint8_t)(num >> i * 8));
227 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
234 put_ebml_id(pb, elementid);
235 put_ebml_num(pb, bytes, 0);
236 for (i = bytes - 1; i >= 0; i--)
237 avio_w8(pb, (uint8_t)(val >> i * 8));
240 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
243 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
245 while (tmp>>=8) bytes++;
247 put_ebml_id(pb, elementid);
248 put_ebml_num(pb, bytes, 0);
249 for (i = bytes - 1; i >= 0; i--)
250 avio_w8(pb, (uint8_t)(val >> i * 8));
253 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
255 put_ebml_id(pb, elementid);
256 put_ebml_num(pb, 8, 0);
257 avio_wb64(pb, av_double2int(val));
260 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
261 const void *buf, int size)
263 put_ebml_id(pb, elementid);
264 put_ebml_num(pb, size, 0);
265 avio_write(pb, buf, size);
268 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
271 put_ebml_binary(pb, elementid, str, strlen(str));
275 * Write a void element of a given size. Useful for reserving space in
276 * the file to be written to later.
278 * @param size The number of bytes to reserve, which must be at least 2.
280 static void put_ebml_void(AVIOContext *pb, int size)
282 av_assert0(size >= 2);
284 put_ebml_id(pb, EBML_ID_VOID);
285 // we need to subtract the length needed to store the size from the
286 // size we need to reserve so 2 cases, we use 8 bytes to store the
287 // size if possible, 1 byte otherwise
290 put_ebml_num(pb, size, 0);
293 put_ebml_num(pb, size, 8);
295 ffio_fill(pb, 0, size);
298 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
299 uint64_t expectedsize)
301 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
303 put_ebml_id(pb, elementid);
304 put_ebml_size_unknown(pb, bytes);
305 return (ebml_master) { avio_tell(pb), bytes };
308 static void end_ebml_master(AVIOContext *pb, ebml_master master)
310 int64_t pos = avio_tell(pb);
312 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
314 put_ebml_num(pb, pos - master.pos, master.sizebytes);
315 avio_seek(pb, pos, SEEK_SET);
318 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
322 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
326 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
331 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
332 MatroskaMuxContext *mkv, uint32_t id,
333 int length_size, int keep_buffer)
335 uint8_t *buf, crc[4];
339 size = avio_get_dyn_buf(*dyn_cp, &buf);
340 put_ebml_num(pb, size, length_size);
341 if (mkv->write_crc) {
342 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
343 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
344 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
346 avio_write(pb, buf + skip, size - skip);
349 ffio_reset_dyn_buf(*dyn_cp);
351 ffio_free_dyn_buf(dyn_cp);
356 * Complete ebml master without destroying the buffer, allowing for later updates
358 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
359 uint32_t id, int64_t *pos)
362 int size = avio_get_dyn_buf(dyn_cp, &buf);
364 *pos = avio_tell(pb);
367 put_ebml_num(pb, size, 0);
368 avio_write(pb, buf, size);
371 static void put_xiph_size(AVIOContext *pb, int size)
373 ffio_fill(pb, 255, size / 255);
374 avio_w8(pb, size % 255);
378 * Free the members allocated in the mux context.
380 static void mkv_deinit(AVFormatContext *s)
382 MatroskaMuxContext *mkv = s->priv_data;
384 av_packet_unref(&mkv->cur_audio_pkt);
386 ffio_free_dyn_buf(&mkv->cluster_bc);
387 ffio_free_dyn_buf(&mkv->info_bc);
388 ffio_free_dyn_buf(&mkv->tracks_bc);
389 ffio_free_dyn_buf(&mkv->tags_bc);
391 av_freep(&mkv->cues.entries);
392 av_freep(&mkv->tracks);
396 * Initialize the SeekHead element to be ready to index level 1 Matroska
397 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
398 * will be reserved at the current file location.
400 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
402 mkv->seekhead.filepos = avio_tell(pb);
403 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
404 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
405 // that an EBML void element will fit afterwards
406 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
407 put_ebml_void(pb, mkv->seekhead.reserved_size);
410 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
413 mkv_seekhead *seekhead = &mkv->seekhead;
415 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
417 seekhead->entries[seekhead->num_entries].elementid = elementid;
418 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
422 * Write the SeekHead to the file at the location reserved for it
423 * and seek to destpos afterwards. When error_on_seek_failure
424 * is not set, failure to seek to the position designated for the
425 * SeekHead is not considered an error and it is presumed that
426 * destpos is the current position; failure to seek to destpos
427 * afterwards is always an error.
429 * @return 0 on success, < 0 on error.
431 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
432 int error_on_seek_failure, int64_t destpos)
434 AVIOContext *dyn_cp = NULL;
435 mkv_seekhead *seekhead = &mkv->seekhead;
436 int64_t remaining, ret64;
439 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
440 return error_on_seek_failure ? ret64 : 0;
442 ret = start_ebml_master_crc32(&dyn_cp, mkv);
446 for (i = 0; i < seekhead->num_entries; i++) {
447 mkv_seekhead_entry *entry = &seekhead->entries[i];
448 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
451 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
452 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
453 put_ebml_id(dyn_cp, entry->elementid);
455 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
456 end_ebml_master(dyn_cp, seekentry);
458 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
460 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
461 put_ebml_void(pb, remaining);
463 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
469 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int tracknum, int64_t ts,
470 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
472 mkv_cues *cues = &mkv->cues;
473 mkv_cuepoint *entries = cues->entries;
478 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
480 return AVERROR(ENOMEM);
481 cues->entries = entries;
483 cues->entries[cues->num_entries].pts = ts;
484 cues->entries[cues->num_entries].stream_idx = stream;
485 cues->entries[cues->num_entries].tracknum = tracknum;
486 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
487 cues->entries[cues->num_entries].relative_pos = relative_pos;
488 cues->entries[cues->num_entries++].duration = duration;
493 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
494 mkv_cues *cues, mkv_track *tracks, int num_tracks)
496 AVIOContext *cuepoint;
499 ret = avio_open_dyn_buf(&cuepoint);
503 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
505 uint64_t pts = entry->pts;
509 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
511 // put all the entries from different tracks that have the exact same
512 // timestamp into the same CuePoint
513 for (int j = 0; j < num_tracks; j++)
514 tracks[j].has_cue = 0;
516 ebml_master track_positions;
517 int idx = entry->stream_idx;
519 av_assert0(idx >= 0 && idx < num_tracks);
520 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
522 tracks[idx].has_cue = 1;
523 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
524 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , entry->tracknum );
525 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
526 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
527 if (entry->duration != -1)
528 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
529 end_ebml_master(cuepoint, track_positions);
530 } while (++entry < end && entry->pts == pts);
531 size = avio_get_dyn_buf(cuepoint, &buf);
532 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
533 ffio_reset_dyn_buf(cuepoint);
535 ffio_free_dyn_buf(&cuepoint);
540 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
542 const uint8_t *header_start[3];
544 int first_header_size;
547 if (par->codec_id == AV_CODEC_ID_VORBIS)
548 first_header_size = 30;
550 first_header_size = 42;
552 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
553 first_header_size, header_start, header_len) < 0) {
554 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
558 avio_w8(pb, 2); // number packets - 1
559 for (j = 0; j < 2; j++) {
560 put_xiph_size(pb, header_len[j]);
562 for (j = 0; j < 3; j++)
563 avio_write(pb, header_start[j], header_len[j]);
568 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
570 if (par->extradata && par->extradata_size == 2)
571 avio_write(pb, par->extradata, 2);
573 avio_wl16(pb, 0x410); // fallback to the most recent version
577 static int put_flac_codecpriv(AVFormatContext *s,
578 AVIOContext *pb, AVCodecParameters *par)
580 int write_comment = (par->channel_layout &&
581 !(par->channel_layout & ~0x3ffffULL) &&
582 !ff_flac_is_native_layout(par->channel_layout));
583 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
590 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
591 "Lavf" : LIBAVFORMAT_IDENT;
592 AVDictionary *dict = NULL;
593 uint8_t buf[32], *data, *p;
596 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
597 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
599 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
600 if (len >= ((1<<24) - 4)) {
602 return AVERROR(EINVAL);
605 data = av_malloc(len + 4);
608 return AVERROR(ENOMEM);
612 AV_WB24(data + 1, len);
615 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
617 avio_write(pb, data, len + 4);
626 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
627 int *sample_rate, int *output_sample_rate)
629 MPEG4AudioConfig mp4ac;
632 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
633 /* Don't abort if the failure is because of missing extradata. Assume in that
634 * case a bitstream filter will provide the muxer with the extradata in the
636 * Abort however if s->pb is not seekable, as we would not be able to seek back
637 * to write the sample rate elements once the extradata shows up, anyway. */
638 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
639 av_log(s, AV_LOG_ERROR,
640 "Error parsing AAC extradata, unable to determine samplerate.\n");
641 return AVERROR(EINVAL);
645 /* This will only happen when this function is called while writing the
646 * header and no extradata is available. The space for this element has
647 * to be reserved for when this function is called again after the
648 * extradata shows up in the first packet, as there's no way to know if
649 * output_sample_rate will be different than sample_rate or not. */
650 *output_sample_rate = *sample_rate;
652 *sample_rate = mp4ac.sample_rate;
653 *output_sample_rate = mp4ac.ext_sample_rate;
658 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
659 AVCodecParameters *par,
662 switch (par->codec_id) {
663 case AV_CODEC_ID_VORBIS:
664 case AV_CODEC_ID_THEORA:
665 return put_xiph_codecpriv(s, dyn_cp, par);
666 case AV_CODEC_ID_FLAC:
667 return put_flac_codecpriv(s, dyn_cp, par);
668 case AV_CODEC_ID_WAVPACK:
669 return put_wv_codecpriv(dyn_cp, par);
670 case AV_CODEC_ID_H264:
671 return ff_isom_write_avcc(dyn_cp, par->extradata,
672 par->extradata_size);
673 case AV_CODEC_ID_HEVC:
674 return ff_isom_write_hvcc(dyn_cp, par->extradata,
675 par->extradata_size, 0);
676 case AV_CODEC_ID_AV1:
677 if (par->extradata_size)
678 return ff_isom_write_av1c(dyn_cp, par->extradata,
679 par->extradata_size);
681 put_ebml_void(pb, 4 + 3);
683 case AV_CODEC_ID_ALAC:
684 if (par->extradata_size < 36) {
685 av_log(s, AV_LOG_ERROR,
686 "Invalid extradata found, ALAC expects a 36-byte "
688 return AVERROR_INVALIDDATA;
690 avio_write(dyn_cp, par->extradata + 12,
691 par->extradata_size - 12);
693 case AV_CODEC_ID_AAC:
694 if (par->extradata_size)
695 avio_write(dyn_cp, par->extradata, par->extradata_size);
697 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
700 if (par->codec_id == AV_CODEC_ID_PRORES &&
701 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
702 avio_wl32(dyn_cp, par->codec_tag);
703 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
704 avio_write(dyn_cp, par->extradata, par->extradata_size);
710 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
711 AVCodecParameters *par,
712 int native_id, int qt_id)
716 int ret, codecpriv_size;
718 ret = avio_open_dyn_buf(&dyn_cp);
723 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
724 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
727 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
729 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
730 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
733 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
734 avio_wl32(dyn_cp, par->codec_tag);
735 for(i = 0; i < 0x5a - 8; i++)
738 avio_write(dyn_cp, par->extradata, par->extradata_size);
740 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
741 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
742 avcodec_get_name(par->codec_id));
745 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
747 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
748 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
749 avcodec_get_name(par->codec_id));
750 ret = AVERROR(EINVAL);
753 ff_put_bmp_header(dyn_cp, par, 0, 0);
755 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
757 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
759 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
760 avcodec_get_name(par->codec_id));
761 ret = AVERROR(EINVAL);
764 par->codec_tag = tag;
766 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
769 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
771 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
773 ffio_free_dyn_buf(&dyn_cp);
777 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
779 uint8_t *colorinfo_ptr;
780 int side_data_size = 0;
781 int ret, colorinfo_size;
782 const uint8_t *side_data;
784 ret = avio_open_dyn_buf(&dyn_cp);
788 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
789 par->color_trc < AVCOL_TRC_NB) {
790 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
793 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
794 par->color_space < AVCOL_SPC_NB) {
795 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
797 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
798 par->color_primaries < AVCOL_PRI_NB) {
799 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
801 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
802 par->color_range < AVCOL_RANGE_NB) {
803 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
805 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
806 par->chroma_location <= AVCHROMA_LOC_TOP) {
809 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
810 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
811 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
814 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
816 if (side_data_size) {
817 const AVContentLightMetadata *metadata =
818 (const AVContentLightMetadata*)side_data;
819 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
820 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
823 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
825 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
826 ebml_master meta_element = start_ebml_master(
827 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
828 const AVMasteringDisplayMetadata *metadata =
829 (const AVMasteringDisplayMetadata*)side_data;
830 if (metadata->has_primaries) {
831 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
832 av_q2d(metadata->display_primaries[0][0]));
833 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
834 av_q2d(metadata->display_primaries[0][1]));
835 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
836 av_q2d(metadata->display_primaries[1][0]));
837 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
838 av_q2d(metadata->display_primaries[1][1]));
839 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
840 av_q2d(metadata->display_primaries[2][0]));
841 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
842 av_q2d(metadata->display_primaries[2][1]));
843 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
844 av_q2d(metadata->white_point[0]));
845 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
846 av_q2d(metadata->white_point[1]));
848 if (metadata->has_luminance) {
849 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
850 av_q2d(metadata->max_luminance));
851 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
852 av_q2d(metadata->min_luminance));
854 end_ebml_master(dyn_cp, meta_element);
857 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
858 if (colorinfo_size) {
859 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
860 avio_write(pb, colorinfo_ptr, colorinfo_size);
861 end_ebml_master(pb, colorinfo);
863 ffio_free_dyn_buf(&dyn_cp);
867 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
870 ebml_master projection;
871 int side_data_size = 0;
874 const AVSphericalMapping *spherical =
875 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
881 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
882 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
883 spherical->projection != AV_SPHERICAL_CUBEMAP) {
884 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
888 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
889 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
890 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
891 4 * (2 + 1 + 8) + (2 + 1 + 20));
893 switch (spherical->projection) {
894 case AV_SPHERICAL_EQUIRECTANGULAR:
895 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
896 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
898 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
899 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
900 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
901 AV_WB32(private, 0); // version + flags
902 AV_WB32(private + 4, spherical->bound_top);
903 AV_WB32(private + 8, spherical->bound_bottom);
904 AV_WB32(private + 12, spherical->bound_left);
905 AV_WB32(private + 16, spherical->bound_right);
906 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
909 case AV_SPHERICAL_CUBEMAP:
910 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
911 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
912 AV_WB32(private, 0); // version + flags
913 AV_WB32(private + 4, 0); // layout
914 AV_WB32(private + 8, spherical->padding);
915 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
923 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
924 (double) spherical->yaw / (1 << 16));
925 if (spherical->pitch)
926 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
927 (double) spherical->pitch / (1 << 16));
929 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
930 (double) spherical->roll / (1 << 16));
932 end_ebml_master(pb, projection);
937 static void mkv_write_field_order(AVIOContext *pb, int mode,
938 enum AVFieldOrder field_order)
940 switch (field_order) {
941 case AV_FIELD_UNKNOWN:
943 case AV_FIELD_PROGRESSIVE:
944 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
945 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
951 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
952 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
953 if (mode != MODE_WEBM) {
954 switch (field_order) {
956 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
957 MATROSKA_VIDEO_FIELDORDER_TT);
960 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
961 MATROSKA_VIDEO_FIELDORDER_BB);
964 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
965 MATROSKA_VIDEO_FIELDORDER_TB);
968 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
969 MATROSKA_VIDEO_FIELDORDER_BT);
976 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
977 AVStream *st, int mode, int *h_width, int *h_height)
981 AVDictionaryEntry *tag;
982 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
986 // convert metadata into proper side data and add it to the stream
987 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
988 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
989 int stereo_mode = atoi(tag->value);
991 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
992 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
997 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
998 stereo_mode != 10 && stereo_mode != 12) {
999 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1005 // iterate to find the stereo3d side data
1006 for (i = 0; i < st->nb_side_data; i++) {
1007 AVPacketSideData sd = st->side_data[i];
1008 if (sd.type == AV_PKT_DATA_STEREO3D) {
1009 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1011 switch (stereo->type) {
1012 case AV_STEREO3D_2D:
1013 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1015 case AV_STEREO3D_SIDEBYSIDE:
1016 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1017 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1018 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1021 case AV_STEREO3D_TOPBOTTOM:
1022 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1023 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1027 case AV_STEREO3D_CHECKERBOARD:
1028 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1029 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1032 case AV_STEREO3D_LINES:
1033 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1034 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1038 case AV_STEREO3D_COLUMNS:
1039 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1040 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1044 case AV_STEREO3D_FRAMESEQUENCE:
1045 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1046 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1054 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1057 // if webm, do not write unsupported modes
1058 if ((mode == MODE_WEBM &&
1059 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1060 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1061 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1062 av_log(s, AV_LOG_ERROR,
1063 "The specified stereo mode is not valid.\n");
1064 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1065 return AVERROR(EINVAL);
1068 // write StereoMode if format is valid
1069 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1074 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1075 int i, AVIOContext *pb, int default_stream_exists)
1077 AVStream *st = s->streams[i];
1078 AVCodecParameters *par = st->codecpar;
1079 ebml_master subinfo, track;
1083 int sample_rate = par->sample_rate;
1084 int output_sample_rate = 0;
1085 int display_width_div = 1;
1086 int display_height_div = 1;
1088 AVDictionaryEntry *tag;
1090 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1091 mkv->have_attachments = 1;
1095 if (par->codec_id == AV_CODEC_ID_AAC) {
1096 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1097 &output_sample_rate);
1102 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1103 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1104 mkv->is_dash ? mkv->dash_track_number : i + 1);
1105 put_ebml_uint (pb, MATROSKA_ID_TRACKUID, mkv->tracks[i].uid);
1106 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1108 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1109 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1110 tag = av_dict_get(st->metadata, "language", NULL, 0);
1111 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1112 tag && tag->value ? tag->value : "und");
1114 // The default value for TRACKFLAGDEFAULT is 1, so add element
1115 // if we need to clear it.
1116 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1117 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1119 if (st->disposition & AV_DISPOSITION_FORCED)
1120 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1122 if (mkv->mode == MODE_WEBM) {
1123 const char *codec_id;
1124 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1125 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1126 if (ff_webm_codec_tags[j].id == par->codec_id) {
1127 codec_id = ff_webm_codec_tags[j].str;
1132 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1133 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1134 codec_id = "D_WEBVTT/CAPTIONS";
1135 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1136 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1137 codec_id = "D_WEBVTT/DESCRIPTIONS";
1138 native_id = MATROSKA_TRACK_TYPE_METADATA;
1139 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1140 codec_id = "D_WEBVTT/METADATA";
1141 native_id = MATROSKA_TRACK_TYPE_METADATA;
1143 codec_id = "D_WEBVTT/SUBTITLES";
1144 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1149 av_log(s, AV_LOG_ERROR,
1150 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1151 return AVERROR(EINVAL);
1154 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1156 // look for a codec ID string specific to mkv to use,
1157 // if none are found, use AVI codes
1158 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1159 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1160 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1161 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1167 if (mkv->allow_raw_vfw) {
1170 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1171 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1172 return AVERROR(EINVAL);
1177 switch (par->codec_type) {
1178 case AVMEDIA_TYPE_VIDEO:
1179 mkv->have_video = 1;
1180 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1182 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1183 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1184 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1185 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1186 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1187 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1190 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1191 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1192 par->codec_id == AV_CODEC_ID_SVQ1 ||
1193 par->codec_id == AV_CODEC_ID_SVQ3 ||
1194 par->codec_id == AV_CODEC_ID_CINEPAK))
1198 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1199 else if (!native_id) {
1200 // if there is no mkv-specific codec ID, use VFW mode
1201 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1202 mkv->tracks[i].write_dts = 1;
1203 s->internal->avoid_negative_ts_use_pts = 0;
1206 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1208 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1209 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1211 mkv_write_field_order(pb, mkv->mode, par->field_order);
1213 // check both side data and metadata for stereo information,
1214 // write the result to the bitstream if any is found
1215 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1217 &display_height_div);
1221 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1222 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1223 (par->format == AV_PIX_FMT_YUVA420P)) {
1224 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1227 // write DisplayWidth and DisplayHeight, they contain the size of
1228 // a single source view and/or the display aspect ratio
1229 if (st->sample_aspect_ratio.num) {
1230 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1231 if (d_width > INT_MAX) {
1232 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1233 return AVERROR(EINVAL);
1235 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1236 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1237 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1238 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1240 AVRational display_aspect_ratio;
1241 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1242 par->width * (int64_t)st->sample_aspect_ratio.num,
1243 par->height * (int64_t)st->sample_aspect_ratio.den,
1245 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1246 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1247 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1250 } else if (display_width_div != 1 || display_height_div != 1) {
1251 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1252 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1253 } else if (mkv->mode != MODE_WEBM)
1254 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1256 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1257 uint32_t color_space = av_le2ne32(par->codec_tag);
1258 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1260 ret = mkv_write_video_color(pb, par, st);
1263 ret = mkv_write_video_projection(s, pb, st);
1266 end_ebml_master(pb, subinfo);
1269 case AVMEDIA_TYPE_AUDIO:
1270 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1271 int64_t codecdelay = av_rescale_q(par->initial_padding,
1272 (AVRational){ 1, 48000 },
1273 (AVRational){ 1, 1000000000 });
1274 if (codecdelay < 0) {
1275 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1276 return AVERROR(EINVAL);
1278 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1279 // (AVRational){ 1, par->sample_rate },
1282 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1284 if (par->codec_id == AV_CODEC_ID_OPUS)
1285 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1287 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1290 // no mkv-specific ID, use ACM mode
1291 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1293 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1294 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1296 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1297 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1298 if (output_sample_rate)
1299 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1301 bit_depth = av_get_bits_per_sample(par->codec_id);
1302 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1303 if (par->bits_per_raw_sample)
1304 bit_depth = par->bits_per_raw_sample;
1306 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1309 bit_depth = par->bits_per_coded_sample;
1311 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1312 end_ebml_master(pb, subinfo);
1315 case AVMEDIA_TYPE_SUBTITLE:
1317 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1318 return AVERROR(ENOSYS);
1321 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1322 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1324 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1327 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1328 return AVERROR(EINVAL);
1331 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1332 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1333 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1338 end_ebml_master(pb, track);
1343 static int mkv_write_tracks(AVFormatContext *s)
1345 MatroskaMuxContext *mkv = s->priv_data;
1346 AVIOContext *pb = s->pb;
1347 int i, ret, default_stream_exists = 0;
1349 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1351 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1355 for (i = 0; i < s->nb_streams; i++) {
1356 AVStream *st = s->streams[i];
1357 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1359 for (i = 0; i < s->nb_streams; i++) {
1360 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1365 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1366 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1367 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1369 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1374 static int mkv_write_chapters(AVFormatContext *s)
1376 MatroskaMuxContext *mkv = s->priv_data;
1377 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1378 ebml_master editionentry;
1379 AVRational scale = {1, 1E9};
1382 if (!s->nb_chapters || mkv->wrote_chapters)
1385 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1387 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1388 if (ret < 0) return ret;
1390 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1391 if (mkv->mode != MODE_WEBM) {
1392 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1393 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1395 for (i = 0; i < s->nb_chapters; i++) {
1396 ebml_master chapteratom, chapterdisplay;
1397 AVChapter *c = s->chapters[i];
1398 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1399 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1400 AVDictionaryEntry *t = NULL;
1401 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1402 av_log(s, AV_LOG_ERROR,
1403 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1404 chapterstart, chapterend);
1405 return AVERROR_INVALIDDATA;
1408 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1409 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1410 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1411 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1412 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1413 if (mkv->mode != MODE_WEBM) {
1414 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1415 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1417 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1418 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1419 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1420 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1421 end_ebml_master(dyn_cp, chapterdisplay);
1423 end_ebml_master(dyn_cp, chapteratom);
1425 end_ebml_master(dyn_cp, editionentry);
1426 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1428 mkv->wrote_chapters = 1;
1432 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1434 uint8_t *key = av_strdup(t->key);
1436 const uint8_t *lang = NULL;
1440 return AVERROR(ENOMEM);
1442 if ((p = strrchr(p, '-')) &&
1443 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1450 else if (*p >= 'a' && *p <= 'z')
1455 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1456 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1458 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1459 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1460 end_ebml_master(pb, tag);
1466 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1467 uint64_t uid, ebml_master *tag)
1470 MatroskaMuxContext *mkv = s->priv_data;
1471 ebml_master targets;
1474 if (!mkv->tags_bc) {
1475 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1477 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1483 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1484 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1486 put_ebml_uint(pb, elementid, uid);
1487 end_ebml_master(pb, targets);
1491 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1493 return av_strcasecmp(name, "title") &&
1494 av_strcasecmp(name, "stereo_mode") &&
1495 av_strcasecmp(name, "creation_time") &&
1496 av_strcasecmp(name, "encoding_tool") &&
1497 av_strcasecmp(name, "duration") &&
1498 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1499 av_strcasecmp(name, "language")) &&
1500 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1501 (av_strcasecmp(name, "filename") &&
1502 av_strcasecmp(name, "mimetype")));
1505 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1506 uint64_t uid, ebml_master *tag)
1508 MatroskaMuxContext *mkv = s->priv_data;
1511 AVDictionaryEntry *t = NULL;
1513 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1517 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1518 if (mkv_check_tag_name(t->key, elementid)) {
1519 ret = mkv_write_simpletag(mkv->tags_bc, t);
1526 end_ebml_master(mkv->tags_bc, tag2);
1531 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1533 AVDictionaryEntry *t = NULL;
1535 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1536 if (mkv_check_tag_name(t->key, elementid))
1542 static int mkv_write_tags(AVFormatContext *s)
1544 MatroskaMuxContext *mkv = s->priv_data;
1545 ebml_master tag, *tagp;
1548 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1550 if (mkv_check_tag(s->metadata, 0)) {
1551 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1552 if (ret < 0) return ret;
1555 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1556 for (i = 0; i < s->nb_streams; i++) {
1557 AVStream *st = s->streams[i];
1558 mkv_track *track = &mkv->tracks[i];
1560 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1563 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1566 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1568 if (ret < 0) return ret;
1571 AVIOContext *pb = mkv->tags_bc;
1572 ebml_master simpletag;
1574 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1575 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1576 mkv->tracks[i].duration_offset = avio_tell(pb);
1578 // Reserve space to write duration as a 20-byte string.
1579 // 2 (ebml id) + 1 (data size) + 20 (data)
1580 put_ebml_void(pb, 23);
1581 end_ebml_master(pb, simpletag);
1582 end_ebml_master(pb, tag);
1586 if (mkv->mode != MODE_WEBM) {
1587 for (i = 0; i < s->nb_chapters; i++) {
1588 AVChapter *ch = s->chapters[i];
1590 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1593 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1594 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1601 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1602 for (i = 0; i < s->nb_streams; i++) {
1603 mkv_track *track = &mkv->tracks[i];
1604 AVStream *st = s->streams[i];
1606 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1609 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1612 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1620 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1621 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1622 MATROSKA_ID_TAGS, &mkv->tags_pos);
1624 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1629 static int mkv_write_attachments(AVFormatContext *s)
1631 MatroskaMuxContext *mkv = s->priv_data;
1632 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1635 if (!mkv->have_attachments)
1638 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1640 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1641 if (ret < 0) return ret;
1643 for (i = 0; i < s->nb_streams; i++) {
1644 AVStream *st = s->streams[i];
1645 mkv_track *track = &mkv->tracks[i];
1646 ebml_master attached_file;
1647 AVDictionaryEntry *t;
1648 const char *mimetype = NULL;
1650 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1653 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1655 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1656 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1657 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1658 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1659 return AVERROR(EINVAL);
1661 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1662 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1663 mimetype = t->value;
1664 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1666 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1667 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1668 mimetype = ff_mkv_mime_tags[i].str;
1671 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1672 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1673 mimetype = ff_mkv_image_mime_tags[i].str;
1678 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1679 "it cannot be deduced from the codec id.\n", i);
1680 return AVERROR(EINVAL);
1683 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1684 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1685 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1686 end_ebml_master(dyn_cp, attached_file);
1688 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1693 static int64_t get_metadata_duration(AVFormatContext *s)
1699 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1700 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1701 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1705 for (i = 0; i < s->nb_streams; i++) {
1707 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1709 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1710 max = FFMAX(max, us);
1713 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1717 static int mkv_write_header(AVFormatContext *s)
1719 MatroskaMuxContext *mkv = s->priv_data;
1720 AVIOContext *pb = s->pb;
1721 ebml_master ebml_header;
1722 AVDictionaryEntry *tag;
1723 int ret, i, version = 2;
1724 int64_t creation_time;
1726 if (!strcmp(s->oformat->name, "webm")) {
1727 mkv->mode = MODE_WEBM;
1730 mkv->mode = MODE_MATROSKAv2;
1732 if (mkv->mode != MODE_WEBM ||
1733 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1734 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1737 for (i = 0; i < s->nb_streams; i++) {
1738 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1739 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1740 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1744 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1745 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1746 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1747 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1748 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1749 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1750 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1751 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1752 end_ebml_master(pb, ebml_header);
1754 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1755 mkv->segment_offset = avio_tell(pb);
1757 // we write a seek head at the beginning to point to all other level
1758 // one elements (except Clusters).
1759 mkv_start_seekhead(mkv, pb);
1761 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1763 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1768 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1769 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1770 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1771 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1772 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1773 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1774 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1776 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1778 if (mkv->mode != MODE_WEBM) {
1779 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1782 const char *ident = "Lavf";
1783 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1784 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1787 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1788 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1789 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1790 uint8_t date_utc_buf[8];
1791 AV_WB64(date_utc_buf, date_utc);
1792 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1795 // reserve space for the duration
1797 mkv->duration_offset = avio_tell(pb);
1798 if (!mkv->is_live) {
1799 int64_t metadata_duration = get_metadata_duration(s);
1801 if (s->duration > 0) {
1802 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1803 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1804 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1805 } else if (metadata_duration > 0) {
1806 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1807 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1808 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1810 put_ebml_void(pb, 11); // assumes double-precision float to be written
1813 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1814 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1815 MATROSKA_ID_INFO, &mkv->info_pos);
1817 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1820 ret = mkv_write_tracks(s);
1824 for (i = 0; i < s->nb_chapters; i++)
1825 if (!s->chapters[i]->id) {
1826 mkv->chapter_id_offset = 1;
1830 ret = mkv_write_chapters(s);
1834 if (mkv->mode != MODE_WEBM) {
1835 ret = mkv_write_attachments(s);
1840 ret = mkv_write_tags(s);
1844 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1845 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1850 if (s->metadata_header_padding > 0) {
1851 if (s->metadata_header_padding == 1)
1852 s->metadata_header_padding++;
1853 put_ebml_void(pb, s->metadata_header_padding);
1856 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1857 mkv->cues_pos = avio_tell(pb);
1858 if (mkv->reserve_cues_space == 1)
1859 mkv->reserve_cues_space++;
1860 put_ebml_void(pb, mkv->reserve_cues_space);
1863 av_init_packet(&mkv->cur_audio_pkt);
1864 mkv->cur_audio_pkt.size = 0;
1865 mkv->cluster_pos = -1;
1867 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1868 // after 4k and on a keyframe
1869 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1870 if (mkv->cluster_time_limit < 0)
1871 mkv->cluster_time_limit = 5000;
1872 if (mkv->cluster_size_limit < 0)
1873 mkv->cluster_size_limit = 5 * 1024 * 1024;
1875 if (mkv->cluster_time_limit < 0)
1876 mkv->cluster_time_limit = 1000;
1877 if (mkv->cluster_size_limit < 0)
1878 mkv->cluster_size_limit = 32 * 1024;
1884 static int mkv_blockgroup_size(int pkt_size)
1886 int size = pkt_size + 4;
1887 size += ebml_num_size(size);
1888 size += 2; // EBML ID for block and block duration
1889 size += 9; // max size of block duration incl. length field
1893 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1900 dst = av_malloc(srclen);
1902 return AVERROR(ENOMEM);
1904 while (srclen >= WV_HEADER_SIZE) {
1907 ret = ff_wv_parse_header(&header, src);
1910 src += WV_HEADER_SIZE;
1911 srclen -= WV_HEADER_SIZE;
1913 if (srclen < header.blocksize) {
1914 ret = AVERROR_INVALIDDATA;
1918 if (header.initial) {
1919 AV_WL32(dst + offset, header.samples);
1922 AV_WL32(dst + offset, header.flags);
1923 AV_WL32(dst + offset + 4, header.crc);
1926 if (!(header.initial && header.final)) {
1927 AV_WL32(dst + offset, header.blocksize);
1931 memcpy(dst + offset, src, header.blocksize);
1932 src += header.blocksize;
1933 srclen -= header.blocksize;
1934 offset += header.blocksize;
1946 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1947 uint32_t blockid, AVPacket *pkt, int keyframe)
1949 MatroskaMuxContext *mkv = s->priv_data;
1950 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1951 mkv_track *track = &mkv->tracks[pkt->stream_index];
1952 uint8_t *data = NULL, *side_data = NULL;
1953 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1954 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1955 uint64_t additional_id;
1956 int64_t discard_padding = 0;
1957 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1958 ebml_master block_group, block_additions, block_more;
1960 ts += track->ts_offset;
1962 /* The following string is identical to the one in mkv_write_vtt_blocks
1963 * so that only one copy needs to exist in binaries. */
1964 av_log(s, AV_LOG_DEBUG,
1965 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1966 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1967 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
1968 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1969 mkv->cluster_pos, track_number, keyframe != 0);
1971 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1972 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1973 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1974 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1975 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1976 /* extradata is Annex B, assume the bitstream is too and convert it */
1977 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1978 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1979 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1980 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1981 err = mkv_strip_wavpack(pkt->data, &data, &size);
1986 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
1987 "a packet from stream %d.\n", pkt->stream_index);
1991 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1992 /* Matroska specification requires to remove the first QuickTime atom
1998 side_data = av_packet_get_side_data(pkt,
1999 AV_PKT_DATA_SKIP_SAMPLES,
2001 if (side_data && side_data_size >= 10) {
2002 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2003 (AVRational){1, par->sample_rate},
2004 (AVRational){1, 1000000000});
2007 side_data = av_packet_get_side_data(pkt,
2008 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2011 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2012 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2016 side_data_size -= 8;
2020 if (side_data_size || discard_padding) {
2021 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2022 blockid = MATROSKA_ID_BLOCK;
2025 put_ebml_id(pb, blockid);
2026 put_ebml_num(pb, size + 4, 0);
2027 // this assumes stream_index is less than 126
2028 avio_w8(pb, 0x80 | track_number);
2029 avio_wb16(pb, ts - mkv->cluster_pts);
2030 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2031 avio_write(pb, data + offset, size);
2032 if (data != pkt->data)
2035 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2036 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2038 track->last_timestamp = ts;
2040 if (discard_padding) {
2041 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2044 if (side_data_size) {
2045 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2046 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2047 /* Until dbc50f8a our demuxer used a wrong default value
2048 * of BlockAddID, so we write it unconditionally. */
2049 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2050 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2051 side_data, side_data_size);
2052 end_ebml_master(pb, block_more);
2053 end_ebml_master(pb, block_additions);
2055 if (side_data_size || discard_padding) {
2056 end_ebml_master(pb, block_group);
2062 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2064 MatroskaMuxContext *mkv = s->priv_data;
2065 ebml_master blockgroup;
2066 int id_size, settings_size, size;
2067 uint8_t *id, *settings;
2068 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2069 const int flags = 0;
2072 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2076 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2079 size = id_size + 1 + settings_size + 1 + pkt->size;
2081 /* The following string is identical to the one in mkv_write_block so that
2082 * only one copy needs to exist in binaries. */
2083 av_log(s, AV_LOG_DEBUG,
2084 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2085 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2086 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2087 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2088 mkv->cluster_pos, pkt->stream_index + 1, 1);
2090 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2092 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2093 put_ebml_num(pb, size + 4, 0);
2094 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2095 avio_wb16(pb, ts - mkv->cluster_pts);
2097 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2099 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2100 end_ebml_master(pb, blockgroup);
2102 return pkt->duration;
2105 static void mkv_end_cluster(AVFormatContext *s)
2107 MatroskaMuxContext *mkv = s->priv_data;
2109 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2110 mkv->cluster_pos = -1;
2111 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2114 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2116 MatroskaMuxContext *mkv = s->priv_data;
2117 mkv_track *track = &mkv->tracks[pkt->stream_index];
2118 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2120 int side_data_size = 0, ret;
2122 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2125 switch (par->codec_id) {
2126 case AV_CODEC_ID_AAC:
2127 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2128 int filler, output_sample_rate = 0;
2129 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2130 &output_sample_rate);
2133 if (!output_sample_rate)
2134 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2135 ret = ff_alloc_extradata(par, side_data_size);
2138 memcpy(par->extradata, side_data, side_data_size);
2139 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2140 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2141 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2143 put_ebml_void(mkv->tracks_bc, filler);
2144 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2145 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2146 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2147 } else if (!par->extradata_size && !track->sample_rate) {
2148 // No extradata (codecpar or packet side data).
2149 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2150 return AVERROR(EINVAL);
2153 case AV_CODEC_ID_FLAC:
2154 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2155 AVCodecParameters *codecpriv_par;
2156 if (side_data_size != par->extradata_size) {
2157 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2159 return AVERROR(EINVAL);
2161 codecpriv_par = avcodec_parameters_alloc();
2163 return AVERROR(ENOMEM);
2164 ret = avcodec_parameters_copy(codecpriv_par, par);
2166 avcodec_parameters_free(&codecpriv_par);
2169 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2170 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2171 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2172 avcodec_parameters_free(&codecpriv_par);
2175 // FIXME: Remove the following once libaom starts propagating extradata during init()
2176 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2177 case AV_CODEC_ID_AV1:
2178 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2179 !par->extradata_size) {
2180 AVIOContext *dyn_cp;
2183 ret = avio_open_dyn_buf(&dyn_cp);
2186 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2187 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2188 if (!codecpriv_size) {
2190 return AVERROR_INVALIDDATA;
2192 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2193 // Do not write the OBUs as we don't have space saved for them
2194 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2196 ret = ff_alloc_extradata(par, side_data_size);
2199 memcpy(par->extradata, side_data, side_data_size);
2200 } else if (!par->extradata_size)
2201 return AVERROR_INVALIDDATA;
2205 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2212 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2214 MatroskaMuxContext *mkv = s->priv_data;
2216 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2217 mkv_track *track = &mkv->tracks[pkt->stream_index];
2218 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2219 int duration = pkt->duration;
2221 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2222 int64_t relative_packet_pos;
2223 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2225 if (ts == AV_NOPTS_VALUE) {
2226 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2227 return AVERROR(EINVAL);
2229 ts += track->ts_offset;
2231 if (mkv->cluster_pos != -1) {
2232 int64_t cluster_time = ts - mkv->cluster_pts;
2233 if ((int16_t)cluster_time != cluster_time) {
2235 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2239 if (mkv->cluster_pos == -1) {
2240 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2243 mkv->cluster_pos = avio_tell(s->pb);
2244 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2245 mkv->cluster_pts = FFMAX(0, ts);
2246 av_log(s, AV_LOG_DEBUG,
2247 "Starting new cluster with timestamp "
2248 "%" PRId64 " at offset %" PRId64 " bytes\n",
2249 mkv->cluster_pts, mkv->cluster_pos);
2251 pb = mkv->cluster_bc;
2253 relative_packet_pos = avio_tell(pb);
2255 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2256 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2259 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2260 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2261 mkv->cluster_pos, relative_packet_pos, -1);
2262 if (ret < 0) return ret;
2265 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2266 duration = mkv_write_vtt_blocks(s, pb, pkt);
2268 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2269 mkv_blockgroup_size(pkt->size));
2271 #if FF_API_CONVERGENCE_DURATION
2272 FF_DISABLE_DEPRECATION_WARNINGS
2273 /* For backward compatibility, prefer convergence_duration. */
2274 if (pkt->convergence_duration > 0) {
2275 duration = pkt->convergence_duration;
2277 FF_ENABLE_DEPRECATION_WARNINGS
2279 /* All subtitle blocks are considered to be keyframes. */
2280 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2281 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2282 end_ebml_master(pb, blockgroup);
2285 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2286 ret = mkv_add_cuepoint(mkv, pkt->stream_index, tracknum, ts,
2287 mkv->cluster_pos, relative_packet_pos, duration);
2293 mkv->duration = FFMAX(mkv->duration, ts + duration);
2294 track->duration = FFMAX(track->duration, ts + duration);
2299 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2301 MatroskaMuxContext *mkv = s->priv_data;
2302 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2303 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2305 int64_t cluster_time;
2307 int start_new_cluster;
2309 ret = mkv_check_new_extra_data(s, pkt);
2313 if (mkv->tracks[pkt->stream_index].write_dts)
2314 cluster_time = pkt->dts - mkv->cluster_pts;
2316 cluster_time = pkt->pts - mkv->cluster_pts;
2317 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2319 cluster_size = avio_tell(mkv->cluster_bc);
2321 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2322 // WebM DASH specification states that the first block of every cluster
2323 // has to be a key frame. So for DASH video, we only create a cluster
2324 // on seeing key frames.
2325 start_new_cluster = keyframe;
2326 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2327 (mkv->cluster_pos == -1 ||
2328 cluster_time > mkv->cluster_time_limit)) {
2329 // For DASH audio, we create a Cluster based on cluster_time_limit
2330 start_new_cluster = 1;
2331 } else if (!mkv->is_dash &&
2332 (cluster_size > mkv->cluster_size_limit ||
2333 cluster_time > mkv->cluster_time_limit ||
2334 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2335 cluster_size > 4 * 1024))) {
2336 start_new_cluster = 1;
2338 start_new_cluster = 0;
2341 if (mkv->cluster_pos != -1 && start_new_cluster) {
2345 if (!mkv->cluster_pos)
2346 avio_write_marker(s->pb,
2347 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2348 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2350 // check if we have an audio packet cached
2351 if (mkv->cur_audio_pkt.size > 0) {
2352 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2353 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2354 mkv->is_dash ? start_new_cluster : 0);
2355 av_packet_unref(&mkv->cur_audio_pkt);
2357 av_log(s, AV_LOG_ERROR,
2358 "Could not write cached audio packet ret:%d\n", ret);
2363 // buffer an audio packet to ensure the packet containing the video
2364 // keyframe's timecode is contained in the same cluster for WebM
2365 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2367 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2369 ret = mkv_write_packet_internal(s, pkt, 0);
2373 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2375 MatroskaMuxContext *mkv = s->priv_data;
2378 if (mkv->cluster_pos != -1) {
2380 av_log(s, AV_LOG_DEBUG,
2381 "Flushing cluster at offset %" PRIu64 " bytes\n",
2386 return mkv_write_packet(s, pkt);
2389 static int mkv_write_trailer(AVFormatContext *s)
2391 MatroskaMuxContext *mkv = s->priv_data;
2392 AVIOContext *pb = s->pb;
2395 // check if we have an audio packet cached
2396 if (mkv->cur_audio_pkt.size > 0) {
2397 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2399 av_log(s, AV_LOG_ERROR,
2400 "Could not write cached audio packet ret:%d\n", ret);
2405 if (mkv->cluster_bc) {
2406 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2407 MATROSKA_ID_CLUSTER, 0, 0);
2410 ret = mkv_write_chapters(s);
2415 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2416 int64_t endpos, ret64;
2418 endpos = avio_tell(pb);
2420 if (mkv->cues.num_entries) {
2421 AVIOContext *cues = NULL;
2423 int64_t cuespos = endpos;
2424 int length_size = 0;
2426 ret = start_ebml_master_crc32(&cues, mkv);
2430 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2431 mkv->tracks, s->nb_streams);
2433 ffio_free_dyn_buf(&cues);
2437 if (mkv->reserve_cues_space) {
2438 size = avio_tell(cues);
2439 length_size = ebml_num_size(size);
2440 size += 4 + length_size;
2441 if (mkv->reserve_cues_space < size) {
2442 av_log(s, AV_LOG_WARNING,
2443 "Insufficient space reserved for Cues: "
2444 "%d < %"PRIu64". No Cues will be output.\n",
2445 mkv->reserve_cues_space, size);
2446 mkv->reserve_cues_space = -1;
2447 ffio_free_dyn_buf(&cues);
2450 cuespos = mkv->cues_pos;
2451 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2452 ffio_free_dyn_buf(&cues);
2455 if (mkv->reserve_cues_space == size + 1) {
2456 /* There is no way to reserve a single byte because
2457 * the minimal size of an EBML Void element is 2
2458 * (1 byte ID, 1 byte length field). This problem
2459 * is solved by writing the Cues' length field on
2460 * one byte more than necessary. */
2466 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2467 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2469 if (mkv->reserve_cues_space) {
2470 if (size < mkv->reserve_cues_space)
2471 put_ebml_void(pb, mkv->reserve_cues_space - size);
2473 endpos = avio_tell(pb);
2477 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2481 // update the duration
2482 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2483 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2484 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2485 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2487 // write tracks master
2488 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2489 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2491 // update stream durations
2494 for (i = 0; i < s->nb_streams; ++i) {
2495 AVStream *st = s->streams[i];
2496 mkv_track *track = &mkv->tracks[i];
2498 if (track->duration_offset > 0) {
2499 double duration_sec = track->duration * av_q2d(st->time_base);
2500 char duration_string[20] = "";
2502 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2505 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2507 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2508 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2509 fmod(duration_sec, 60));
2511 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2515 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2516 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2519 avio_seek(pb, endpos, SEEK_SET);
2522 if (!mkv->is_live) {
2523 end_ebml_master(pb, mkv->segment);
2526 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2529 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2532 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2533 if (ff_mkv_codec_tags[i].id == codec_id)
2536 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2537 enum AVMediaType type = avcodec_get_type(codec_id);
2538 // mkv theoretically supports any video/audio through VFW/ACM
2539 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2546 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2549 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2550 if (ff_webm_codec_tags[i].id == codec_id)
2556 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2561 uid = (uint64_t)av_lfg_get(c) << 32;
2562 uid |= av_lfg_get(c);
2565 for (k = 0; k < i; k++) {
2566 if (tracks[k].uid == uid)
2574 static int mkv_init(struct AVFormatContext *s)
2576 MatroskaMuxContext *mkv = s->priv_data;
2580 if (s->nb_streams > MAX_TRACKS) {
2581 av_log(s, AV_LOG_ERROR,
2582 "At most %d streams are supported for muxing in Matroska\n",
2584 return AVERROR(EINVAL);
2587 for (i = 0; i < s->nb_streams; i++) {
2588 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2589 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2590 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2591 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2592 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2593 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2594 av_log(s, AV_LOG_ERROR,
2595 "The Matroska muxer does not yet support muxing %s\n",
2596 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2597 return AVERROR_PATCHWELCOME;
2601 if (s->avoid_negative_ts < 0) {
2602 s->avoid_negative_ts = 1;
2603 s->internal->avoid_negative_ts_use_pts = 1;
2606 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2608 return AVERROR(ENOMEM);
2611 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2612 av_lfg_init(&c, av_get_random_seed());
2614 // Calculate the SegmentUID now in order not to waste our random seed.
2615 for (i = 0; i < 4; i++)
2616 mkv->segment_uid[i] = av_lfg_get(&c);
2619 for (i = 0; i < s->nb_streams; i++) {
2620 mkv_track *track = &mkv->tracks[i];
2622 if (s->flags & AVFMT_FLAG_BITEXACT) {
2625 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2628 // ms precision is the de-facto standard timescale for mkv files
2629 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2635 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2638 AVStream *st = s->streams[pkt->stream_index];
2640 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2641 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2642 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2643 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2644 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2650 static const AVCodecTag additional_audio_tags[] = {
2651 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2652 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2653 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2654 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2655 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2656 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2657 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2658 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2659 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2660 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2661 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2662 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2663 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2666 static const AVCodecTag additional_video_tags[] = {
2667 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2668 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2669 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2670 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2673 static const AVCodecTag additional_subtitle_tags[] = {
2674 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2675 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2676 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2677 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2680 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2681 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2682 static const AVOption options[] = {
2683 { "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 },
2684 { "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 },
2685 { "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 },
2686 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2687 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2688 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2689 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2690 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2694 #if CONFIG_MATROSKA_MUXER
2695 static const AVClass matroska_class = {
2696 .class_name = "matroska muxer",
2697 .item_name = av_default_item_name,
2699 .version = LIBAVUTIL_VERSION_INT,
2702 AVOutputFormat ff_matroska_muxer = {
2704 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2705 .mime_type = "video/x-matroska",
2706 .extensions = "mkv",
2707 .priv_data_size = sizeof(MatroskaMuxContext),
2708 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2709 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2710 .video_codec = CONFIG_LIBX264_ENCODER ?
2711 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2713 .deinit = mkv_deinit,
2714 .write_header = mkv_write_header,
2715 .write_packet = mkv_write_flush_packet,
2716 .write_trailer = mkv_write_trailer,
2717 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2718 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2719 .codec_tag = (const AVCodecTag* const []){
2720 ff_codec_bmp_tags, ff_codec_wav_tags,
2721 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2723 .subtitle_codec = AV_CODEC_ID_ASS,
2724 .query_codec = mkv_query_codec,
2725 .check_bitstream = mkv_check_bitstream,
2726 .priv_class = &matroska_class,
2730 #if CONFIG_WEBM_MUXER
2731 static const AVClass webm_class = {
2732 .class_name = "webm muxer",
2733 .item_name = av_default_item_name,
2735 .version = LIBAVUTIL_VERSION_INT,
2738 AVOutputFormat ff_webm_muxer = {
2740 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2741 .mime_type = "video/webm",
2742 .extensions = "webm",
2743 .priv_data_size = sizeof(MatroskaMuxContext),
2744 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2745 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2746 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2748 .deinit = mkv_deinit,
2749 .write_header = mkv_write_header,
2750 .write_packet = mkv_write_flush_packet,
2751 .write_trailer = mkv_write_trailer,
2752 .query_codec = webm_query_codec,
2753 .check_bitstream = mkv_check_bitstream,
2754 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2755 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2756 .priv_class = &webm_class,
2760 #if CONFIG_MATROSKA_AUDIO_MUXER
2761 static const AVClass mka_class = {
2762 .class_name = "matroska audio muxer",
2763 .item_name = av_default_item_name,
2765 .version = LIBAVUTIL_VERSION_INT,
2767 AVOutputFormat ff_matroska_audio_muxer = {
2769 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2770 .mime_type = "audio/x-matroska",
2771 .extensions = "mka",
2772 .priv_data_size = sizeof(MatroskaMuxContext),
2773 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2774 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2775 .video_codec = AV_CODEC_ID_NONE,
2777 .deinit = mkv_deinit,
2778 .write_header = mkv_write_header,
2779 .write_packet = mkv_write_flush_packet,
2780 .write_trailer = mkv_write_trailer,
2781 .check_bitstream = mkv_check_bitstream,
2782 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2784 .codec_tag = (const AVCodecTag* const []){
2785 ff_codec_wav_tags, additional_audio_tags, 0
2787 .priv_class = &mka_class,