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 {
81 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
82 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
83 int64_t duration; ///< duration of the block according to time base
86 typedef struct mkv_cues {
87 mkv_cuepoint *entries;
91 typedef struct mkv_track {
98 int64_t sample_rate_offset;
99 int64_t last_timestamp;
101 int64_t duration_offset;
102 int64_t codecpriv_offset;
106 #define MODE_MATROSKAv2 0x01
107 #define MODE_WEBM 0x02
109 typedef struct MatroskaMuxContext {
110 const AVClass *class;
112 AVIOContext *tags_bc;
114 AVIOContext *info_bc;
116 AVIOContext *tracks_bc;
119 int64_t segment_offset;
120 AVIOContext *cluster_bc;
121 int64_t cluster_pos; ///< file offset of the current cluster
123 int64_t duration_offset;
125 mkv_seekhead seekhead;
129 AVPacket cur_audio_pkt;
131 unsigned nb_attachments;
134 int reserve_cues_space;
135 int cluster_size_limit;
137 int64_t cluster_time_limit;
139 int dash_track_number;
143 uint32_t chapter_id_offset;
148 uint32_t segment_uid[4];
149 } MatroskaMuxContext;
151 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
152 * 8 byte for "matroska" doctype string */
153 #define MAX_EBML_HEADER_SIZE 35
155 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
156 * offset, 4 bytes for target EBML ID */
157 #define MAX_SEEKENTRY_SIZE 21
159 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
160 #define MAX_CUETRACKPOS_SIZE 40
162 /** Seek preroll value for opus */
163 #define OPUS_SEEK_PREROLL 80000000
165 static int ebml_id_size(uint32_t id)
167 return (av_log2(id) + 7U) / 8;
170 static void put_ebml_id(AVIOContext *pb, uint32_t id)
172 int i = ebml_id_size(id);
174 avio_w8(pb, (uint8_t)(id >> (i * 8)));
178 * Write an EBML size meaning "unknown size".
180 * @param bytes The number of bytes the size should occupy (maximum: 8).
182 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
184 av_assert0(bytes <= 8);
185 avio_w8(pb, 0x1ff >> bytes);
186 ffio_fill(pb, 0xff, bytes - 1);
190 * Returns how many bytes are needed to represent a number
191 * as EBML variable length integer.
193 static int ebml_num_size(uint64_t num)
203 * Calculate how many bytes are needed to represent the length field
204 * of an EBML element whose payload has a given length.
206 static int ebml_length_size(uint64_t length)
208 return ebml_num_size(length + 1);
212 * Write a number as EBML variable length integer on `bytes` bytes.
213 * `bytes` is taken literally without checking.
215 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
217 num |= 1ULL << bytes * 7;
218 for (int i = bytes - 1; i >= 0; i--)
219 avio_w8(pb, (uint8_t)(num >> i * 8));
223 * Write a length as EBML variable length integer.
225 * @param bytes The number of bytes that need to be used to write the number.
226 * If zero, the minimal number of bytes will be used.
228 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
230 int needed_bytes = ebml_length_size(length);
232 // sizes larger than this are currently undefined in EBML
233 av_assert0(length < (1ULL << 56) - 1);
236 bytes = needed_bytes;
237 // The bytes needed to write the given size must not exceed
238 // the bytes that we ought to use.
239 av_assert0(bytes >= needed_bytes);
240 put_ebml_num(pb, length, bytes);
244 * Write a (random) UID with fixed size to make the output more deterministic
246 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
248 put_ebml_id(pb, elementid);
249 put_ebml_length(pb, 8, 0);
253 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
260 put_ebml_id(pb, elementid);
261 put_ebml_length(pb, bytes, 0);
262 for (i = bytes - 1; i >= 0; i--)
263 avio_w8(pb, (uint8_t)(val >> i * 8));
266 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
269 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
271 while (tmp>>=8) bytes++;
273 put_ebml_id(pb, elementid);
274 put_ebml_length(pb, bytes, 0);
275 for (i = bytes - 1; i >= 0; i--)
276 avio_w8(pb, (uint8_t)(val >> i * 8));
279 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
281 put_ebml_id(pb, elementid);
282 put_ebml_length(pb, 8, 0);
283 avio_wb64(pb, av_double2int(val));
286 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
287 const void *buf, int size)
289 put_ebml_id(pb, elementid);
290 put_ebml_length(pb, size, 0);
291 avio_write(pb, buf, size);
294 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
297 put_ebml_binary(pb, elementid, str, strlen(str));
301 * Write a void element of a given size. Useful for reserving space in
302 * the file to be written to later.
304 * @param size The number of bytes to reserve, which must be at least 2.
306 static void put_ebml_void(AVIOContext *pb, int size)
308 av_assert0(size >= 2);
310 put_ebml_id(pb, EBML_ID_VOID);
311 // we need to subtract the length needed to store the size from the
312 // size we need to reserve so 2 cases, we use 8 bytes to store the
313 // size if possible, 1 byte otherwise
316 put_ebml_length(pb, size, 0);
319 put_ebml_length(pb, size, 8);
321 ffio_fill(pb, 0, size);
324 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
325 uint64_t expectedsize)
327 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
329 put_ebml_id(pb, elementid);
330 put_ebml_size_unknown(pb, bytes);
331 return (ebml_master) { avio_tell(pb), bytes };
334 static void end_ebml_master(AVIOContext *pb, ebml_master master)
336 int64_t pos = avio_tell(pb);
338 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
340 put_ebml_length(pb, pos - master.pos, master.sizebytes);
341 avio_seek(pb, pos, SEEK_SET);
344 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
348 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
352 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
357 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
358 MatroskaMuxContext *mkv, uint32_t id,
359 int length_size, int keep_buffer)
361 uint8_t *buf, crc[4];
365 size = avio_get_dyn_buf(*dyn_cp, &buf);
366 put_ebml_length(pb, size, length_size);
367 if (mkv->write_crc) {
368 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
369 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
370 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
372 avio_write(pb, buf + skip, size - skip);
375 ffio_reset_dyn_buf(*dyn_cp);
377 ffio_free_dyn_buf(dyn_cp);
382 * Complete ebml master without destroying the buffer, allowing for later updates
384 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
385 uint32_t id, int64_t *pos)
388 int size = avio_get_dyn_buf(dyn_cp, &buf);
390 *pos = avio_tell(pb);
393 put_ebml_length(pb, size, 0);
394 avio_write(pb, buf, size);
397 static void put_xiph_size(AVIOContext *pb, int size)
399 ffio_fill(pb, 255, size / 255);
400 avio_w8(pb, size % 255);
404 * Free the members allocated in the mux context.
406 static void mkv_deinit(AVFormatContext *s)
408 MatroskaMuxContext *mkv = s->priv_data;
410 av_packet_unref(&mkv->cur_audio_pkt);
412 ffio_free_dyn_buf(&mkv->cluster_bc);
413 ffio_free_dyn_buf(&mkv->info_bc);
414 ffio_free_dyn_buf(&mkv->tracks_bc);
415 ffio_free_dyn_buf(&mkv->tags_bc);
417 av_freep(&mkv->cues.entries);
418 av_freep(&mkv->tracks);
422 * Initialize the SeekHead element to be ready to index level 1 Matroska
423 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
424 * will be reserved at the current file location.
426 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
428 mkv->seekhead.filepos = avio_tell(pb);
429 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
430 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
431 // that an EBML void element will fit afterwards
432 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
433 put_ebml_void(pb, mkv->seekhead.reserved_size);
436 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
439 mkv_seekhead *seekhead = &mkv->seekhead;
441 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
443 seekhead->entries[seekhead->num_entries].elementid = elementid;
444 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
448 * Write the SeekHead to the file at the location reserved for it
449 * and seek to destpos afterwards. When error_on_seek_failure
450 * is not set, failure to seek to the position designated for the
451 * SeekHead is not considered an error and it is presumed that
452 * destpos is the current position; failure to seek to destpos
453 * afterwards is always an error.
455 * @return 0 on success, < 0 on error.
457 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
458 int error_on_seek_failure, int64_t destpos)
460 AVIOContext *dyn_cp = NULL;
461 mkv_seekhead *seekhead = &mkv->seekhead;
462 int64_t remaining, ret64;
465 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
466 return error_on_seek_failure ? ret64 : 0;
468 ret = start_ebml_master_crc32(&dyn_cp, mkv);
472 for (i = 0; i < seekhead->num_entries; i++) {
473 mkv_seekhead_entry *entry = &seekhead->entries[i];
474 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
477 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
478 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
479 put_ebml_id(dyn_cp, entry->elementid);
481 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
482 end_ebml_master(dyn_cp, seekentry);
484 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
486 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
487 put_ebml_void(pb, remaining);
489 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
495 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
496 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
498 mkv_cues *cues = &mkv->cues;
499 mkv_cuepoint *entries = cues->entries;
504 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
506 return AVERROR(ENOMEM);
507 cues->entries = entries;
509 cues->entries[cues->num_entries].pts = ts;
510 cues->entries[cues->num_entries].stream_idx = stream;
511 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
512 cues->entries[cues->num_entries].relative_pos = relative_pos;
513 cues->entries[cues->num_entries++].duration = duration;
518 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
519 mkv_cues *cues, mkv_track *tracks, int num_tracks)
521 AVIOContext *cuepoint;
524 ret = avio_open_dyn_buf(&cuepoint);
528 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
530 uint64_t pts = entry->pts;
534 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
536 // put all the entries from different tracks that have the exact same
537 // timestamp into the same CuePoint
538 for (int j = 0; j < num_tracks; j++)
539 tracks[j].has_cue = 0;
541 ebml_master track_positions;
542 int idx = entry->stream_idx;
544 av_assert0(idx >= 0 && idx < num_tracks);
545 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
547 tracks[idx].has_cue = 1;
548 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
549 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
550 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
551 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
552 if (entry->duration != -1)
553 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
554 end_ebml_master(cuepoint, track_positions);
555 } while (++entry < end && entry->pts == pts);
556 size = avio_get_dyn_buf(cuepoint, &buf);
557 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
558 ffio_reset_dyn_buf(cuepoint);
560 ffio_free_dyn_buf(&cuepoint);
565 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
567 const uint8_t *header_start[3];
569 int first_header_size;
572 if (par->codec_id == AV_CODEC_ID_VORBIS)
573 first_header_size = 30;
575 first_header_size = 42;
577 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
578 first_header_size, header_start, header_len) < 0) {
579 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
583 avio_w8(pb, 2); // number packets - 1
584 for (j = 0; j < 2; j++) {
585 put_xiph_size(pb, header_len[j]);
587 for (j = 0; j < 3; j++)
588 avio_write(pb, header_start[j], header_len[j]);
593 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
595 if (par->extradata && par->extradata_size == 2)
596 avio_write(pb, par->extradata, 2);
598 avio_wl16(pb, 0x410); // fallback to the most recent version
602 static int put_flac_codecpriv(AVFormatContext *s,
603 AVIOContext *pb, AVCodecParameters *par)
605 int write_comment = (par->channel_layout &&
606 !(par->channel_layout & ~0x3ffffULL) &&
607 !ff_flac_is_native_layout(par->channel_layout));
608 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
615 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
616 "Lavf" : LIBAVFORMAT_IDENT;
617 AVDictionary *dict = NULL;
618 uint8_t buf[32], *data, *p;
621 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
622 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
624 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
625 if (len >= ((1<<24) - 4)) {
627 return AVERROR(EINVAL);
630 data = av_malloc(len + 4);
633 return AVERROR(ENOMEM);
637 AV_WB24(data + 1, len);
640 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
642 avio_write(pb, data, len + 4);
651 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
652 int *sample_rate, int *output_sample_rate)
654 MPEG4AudioConfig mp4ac;
657 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
658 /* Don't abort if the failure is because of missing extradata. Assume in that
659 * case a bitstream filter will provide the muxer with the extradata in the
661 * Abort however if s->pb is not seekable, as we would not be able to seek back
662 * to write the sample rate elements once the extradata shows up, anyway. */
663 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
664 av_log(s, AV_LOG_ERROR,
665 "Error parsing AAC extradata, unable to determine samplerate.\n");
666 return AVERROR(EINVAL);
670 /* This will only happen when this function is called while writing the
671 * header and no extradata is available. The space for this element has
672 * to be reserved for when this function is called again after the
673 * extradata shows up in the first packet, as there's no way to know if
674 * output_sample_rate will be different than sample_rate or not. */
675 *output_sample_rate = *sample_rate;
677 *sample_rate = mp4ac.sample_rate;
678 *output_sample_rate = mp4ac.ext_sample_rate;
683 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
684 AVCodecParameters *par,
687 switch (par->codec_id) {
688 case AV_CODEC_ID_VORBIS:
689 case AV_CODEC_ID_THEORA:
690 return put_xiph_codecpriv(s, dyn_cp, par);
691 case AV_CODEC_ID_FLAC:
692 return put_flac_codecpriv(s, dyn_cp, par);
693 case AV_CODEC_ID_WAVPACK:
694 return put_wv_codecpriv(dyn_cp, par);
695 case AV_CODEC_ID_H264:
696 return ff_isom_write_avcc(dyn_cp, par->extradata,
697 par->extradata_size);
698 case AV_CODEC_ID_HEVC:
699 return ff_isom_write_hvcc(dyn_cp, par->extradata,
700 par->extradata_size, 0);
701 case AV_CODEC_ID_AV1:
702 if (par->extradata_size)
703 return ff_isom_write_av1c(dyn_cp, par->extradata,
704 par->extradata_size);
706 put_ebml_void(pb, 4 + 3);
708 case AV_CODEC_ID_ALAC:
709 if (par->extradata_size < 36) {
710 av_log(s, AV_LOG_ERROR,
711 "Invalid extradata found, ALAC expects a 36-byte "
713 return AVERROR_INVALIDDATA;
715 avio_write(dyn_cp, par->extradata + 12,
716 par->extradata_size - 12);
718 case AV_CODEC_ID_AAC:
719 if (par->extradata_size)
720 avio_write(dyn_cp, par->extradata, par->extradata_size);
722 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
725 if (par->codec_id == AV_CODEC_ID_PRORES &&
726 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
727 avio_wl32(dyn_cp, par->codec_tag);
728 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
729 avio_write(dyn_cp, par->extradata, par->extradata_size);
735 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
736 AVCodecParameters *par,
737 int native_id, int qt_id)
741 int ret, codecpriv_size;
743 ret = avio_open_dyn_buf(&dyn_cp);
748 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
749 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
752 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
754 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
755 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
758 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
759 avio_wl32(dyn_cp, par->codec_tag);
760 for(i = 0; i < 0x5a - 8; i++)
763 avio_write(dyn_cp, par->extradata, par->extradata_size);
765 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
766 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
767 avcodec_get_name(par->codec_id));
770 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
772 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
773 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
774 avcodec_get_name(par->codec_id));
775 ret = AVERROR(EINVAL);
778 ff_put_bmp_header(dyn_cp, par, 0, 0);
780 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
782 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
784 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
785 avcodec_get_name(par->codec_id));
786 ret = AVERROR(EINVAL);
789 par->codec_tag = tag;
791 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
794 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
796 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
798 ffio_free_dyn_buf(&dyn_cp);
802 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
804 uint8_t *colorinfo_ptr;
805 int side_data_size = 0;
806 int ret, colorinfo_size;
807 const uint8_t *side_data;
809 ret = avio_open_dyn_buf(&dyn_cp);
813 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
814 par->color_trc < AVCOL_TRC_NB) {
815 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
818 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
819 par->color_space < AVCOL_SPC_NB) {
820 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
822 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
823 par->color_primaries < AVCOL_PRI_NB) {
824 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
826 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
827 par->color_range < AVCOL_RANGE_NB) {
828 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
830 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
831 par->chroma_location <= AVCHROMA_LOC_TOP) {
834 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
835 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
836 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
839 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
841 if (side_data_size) {
842 const AVContentLightMetadata *metadata =
843 (const AVContentLightMetadata*)side_data;
844 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
845 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
848 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
850 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
851 ebml_master meta_element = start_ebml_master(
852 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
853 const AVMasteringDisplayMetadata *metadata =
854 (const AVMasteringDisplayMetadata*)side_data;
855 if (metadata->has_primaries) {
856 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
857 av_q2d(metadata->display_primaries[0][0]));
858 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
859 av_q2d(metadata->display_primaries[0][1]));
860 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
861 av_q2d(metadata->display_primaries[1][0]));
862 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
863 av_q2d(metadata->display_primaries[1][1]));
864 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
865 av_q2d(metadata->display_primaries[2][0]));
866 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
867 av_q2d(metadata->display_primaries[2][1]));
868 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
869 av_q2d(metadata->white_point[0]));
870 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
871 av_q2d(metadata->white_point[1]));
873 if (metadata->has_luminance) {
874 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
875 av_q2d(metadata->max_luminance));
876 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
877 av_q2d(metadata->min_luminance));
879 end_ebml_master(dyn_cp, meta_element);
882 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
883 if (colorinfo_size) {
884 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
885 avio_write(pb, colorinfo_ptr, colorinfo_size);
886 end_ebml_master(pb, colorinfo);
888 ffio_free_dyn_buf(&dyn_cp);
892 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
895 ebml_master projection;
896 int side_data_size = 0;
899 const AVSphericalMapping *spherical =
900 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
906 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
907 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
908 spherical->projection != AV_SPHERICAL_CUBEMAP) {
909 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
913 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
914 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
915 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
916 4 * (2 + 1 + 8) + (2 + 1 + 20));
918 switch (spherical->projection) {
919 case AV_SPHERICAL_EQUIRECTANGULAR:
920 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
921 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
923 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
924 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
925 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
926 AV_WB32(private, 0); // version + flags
927 AV_WB32(private + 4, spherical->bound_top);
928 AV_WB32(private + 8, spherical->bound_bottom);
929 AV_WB32(private + 12, spherical->bound_left);
930 AV_WB32(private + 16, spherical->bound_right);
931 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
934 case AV_SPHERICAL_CUBEMAP:
935 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
936 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
937 AV_WB32(private, 0); // version + flags
938 AV_WB32(private + 4, 0); // layout
939 AV_WB32(private + 8, spherical->padding);
940 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
948 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
949 (double) spherical->yaw / (1 << 16));
950 if (spherical->pitch)
951 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
952 (double) spherical->pitch / (1 << 16));
954 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
955 (double) spherical->roll / (1 << 16));
957 end_ebml_master(pb, projection);
962 static void mkv_write_field_order(AVIOContext *pb, int mode,
963 enum AVFieldOrder field_order)
965 switch (field_order) {
966 case AV_FIELD_UNKNOWN:
968 case AV_FIELD_PROGRESSIVE:
969 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
970 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
976 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
977 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
978 if (mode != MODE_WEBM) {
979 switch (field_order) {
981 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
982 MATROSKA_VIDEO_FIELDORDER_TT);
985 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
986 MATROSKA_VIDEO_FIELDORDER_BB);
989 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
990 MATROSKA_VIDEO_FIELDORDER_TB);
993 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
994 MATROSKA_VIDEO_FIELDORDER_BT);
1001 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1002 AVStream *st, int mode, int *h_width, int *h_height)
1006 AVDictionaryEntry *tag;
1007 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1011 // convert metadata into proper side data and add it to the stream
1012 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1013 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1014 int stereo_mode = atoi(tag->value);
1016 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1017 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1022 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1023 stereo_mode != 10 && stereo_mode != 12) {
1024 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1030 // iterate to find the stereo3d side data
1031 for (i = 0; i < st->nb_side_data; i++) {
1032 AVPacketSideData sd = st->side_data[i];
1033 if (sd.type == AV_PKT_DATA_STEREO3D) {
1034 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1036 switch (stereo->type) {
1037 case AV_STEREO3D_2D:
1038 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1040 case AV_STEREO3D_SIDEBYSIDE:
1041 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1042 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1043 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1046 case AV_STEREO3D_TOPBOTTOM:
1047 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1048 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1052 case AV_STEREO3D_CHECKERBOARD:
1053 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1054 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1057 case AV_STEREO3D_LINES:
1058 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1059 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1063 case AV_STEREO3D_COLUMNS:
1064 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1065 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1069 case AV_STEREO3D_FRAMESEQUENCE:
1070 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1071 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1079 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1082 // if webm, do not write unsupported modes
1083 if ((mode == MODE_WEBM &&
1084 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1085 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1086 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1087 av_log(s, AV_LOG_ERROR,
1088 "The specified stereo mode is not valid.\n");
1089 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1090 return AVERROR(EINVAL);
1093 // write StereoMode if format is valid
1094 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1099 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1100 AVStream *st, mkv_track *track, AVIOContext *pb,
1101 int default_stream_exists)
1103 AVCodecParameters *par = st->codecpar;
1104 ebml_master subinfo, track_master;
1108 int sample_rate = par->sample_rate;
1109 int output_sample_rate = 0;
1110 int display_width_div = 1;
1111 int display_height_div = 1;
1113 AVDictionaryEntry *tag;
1115 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1119 if (par->codec_id == AV_CODEC_ID_AAC) {
1120 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1121 &output_sample_rate);
1126 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1127 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1128 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1129 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1131 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1132 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1133 tag = av_dict_get(st->metadata, "language", NULL, 0);
1134 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1135 tag && tag->value ? tag->value : "und");
1137 // The default value for TRACKFLAGDEFAULT is 1, so add element
1138 // if we need to clear it.
1139 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1140 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1142 if (st->disposition & AV_DISPOSITION_FORCED)
1143 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1145 if (mkv->mode == MODE_WEBM) {
1146 const char *codec_id;
1147 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1148 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1149 if (ff_webm_codec_tags[j].id == par->codec_id) {
1150 codec_id = ff_webm_codec_tags[j].str;
1155 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1156 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1157 codec_id = "D_WEBVTT/CAPTIONS";
1158 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1159 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1160 codec_id = "D_WEBVTT/DESCRIPTIONS";
1161 native_id = MATROSKA_TRACK_TYPE_METADATA;
1162 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1163 codec_id = "D_WEBVTT/METADATA";
1164 native_id = MATROSKA_TRACK_TYPE_METADATA;
1166 codec_id = "D_WEBVTT/SUBTITLES";
1167 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1172 av_log(s, AV_LOG_ERROR,
1173 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1174 return AVERROR(EINVAL);
1177 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1179 // look for a codec ID string specific to mkv to use,
1180 // if none are found, use AVI codes
1181 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1182 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1183 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1184 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1190 if (mkv->allow_raw_vfw) {
1193 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1194 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1195 return AVERROR(EINVAL);
1200 switch (par->codec_type) {
1201 case AVMEDIA_TYPE_VIDEO:
1202 mkv->have_video = 1;
1203 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1205 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1206 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1207 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1208 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1209 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1210 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1213 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1214 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1215 par->codec_id == AV_CODEC_ID_SVQ1 ||
1216 par->codec_id == AV_CODEC_ID_SVQ3 ||
1217 par->codec_id == AV_CODEC_ID_CINEPAK))
1221 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1222 else if (!native_id) {
1223 // if there is no mkv-specific codec ID, use VFW mode
1224 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1225 track->write_dts = 1;
1226 s->internal->avoid_negative_ts_use_pts = 0;
1229 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1231 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1232 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1234 mkv_write_field_order(pb, mkv->mode, par->field_order);
1236 // check both side data and metadata for stereo information,
1237 // write the result to the bitstream if any is found
1238 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1240 &display_height_div);
1244 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1245 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1246 (par->format == AV_PIX_FMT_YUVA420P)) {
1247 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1250 // write DisplayWidth and DisplayHeight, they contain the size of
1251 // a single source view and/or the display aspect ratio
1252 if (st->sample_aspect_ratio.num) {
1253 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1254 if (d_width > INT_MAX) {
1255 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1256 return AVERROR(EINVAL);
1258 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1259 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1260 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1261 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1263 AVRational display_aspect_ratio;
1264 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1265 par->width * (int64_t)st->sample_aspect_ratio.num,
1266 par->height * (int64_t)st->sample_aspect_ratio.den,
1268 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1269 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1270 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1273 } else if (display_width_div != 1 || display_height_div != 1) {
1274 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1275 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1276 } else if (mkv->mode != MODE_WEBM)
1277 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1279 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1280 uint32_t color_space = av_le2ne32(par->codec_tag);
1281 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1283 ret = mkv_write_video_color(pb, par, st);
1286 ret = mkv_write_video_projection(s, pb, st);
1289 end_ebml_master(pb, subinfo);
1292 case AVMEDIA_TYPE_AUDIO:
1293 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1294 int64_t codecdelay = av_rescale_q(par->initial_padding,
1295 (AVRational){ 1, 48000 },
1296 (AVRational){ 1, 1000000000 });
1297 if (codecdelay < 0) {
1298 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1299 return AVERROR(EINVAL);
1301 // track->ts_offset = av_rescale_q(par->initial_padding,
1302 // (AVRational){ 1, par->sample_rate },
1305 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1307 if (par->codec_id == AV_CODEC_ID_OPUS)
1308 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1310 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1313 // no mkv-specific ID, use ACM mode
1314 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1316 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 6 + 4 * 9);
1317 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1319 track->sample_rate_offset = avio_tell(pb);
1320 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1321 if (output_sample_rate)
1322 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1324 bit_depth = av_get_bits_per_sample(par->codec_id);
1325 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1326 if (par->bits_per_raw_sample)
1327 bit_depth = par->bits_per_raw_sample;
1329 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1332 bit_depth = par->bits_per_coded_sample;
1334 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1335 end_ebml_master(pb, subinfo);
1338 case AVMEDIA_TYPE_SUBTITLE:
1340 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1341 return AVERROR(ENOSYS);
1344 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1345 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1347 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1350 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1351 return AVERROR(EINVAL);
1354 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1355 track->codecpriv_offset = avio_tell(pb);
1356 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1361 end_ebml_master(pb, track_master);
1366 static int mkv_write_tracks(AVFormatContext *s)
1368 MatroskaMuxContext *mkv = s->priv_data;
1369 AVIOContext *pb = s->pb;
1370 int i, ret, default_stream_exists = 0;
1372 if (mkv->nb_attachments == s->nb_streams)
1375 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1377 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1381 for (i = 0; i < s->nb_streams; i++) {
1382 AVStream *st = s->streams[i];
1383 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1385 for (i = 0; i < s->nb_streams; i++) {
1386 AVStream *st = s->streams[i];
1387 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1388 mkv->tracks_bc, default_stream_exists);
1393 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1394 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1395 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1397 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1402 static int mkv_write_chapters(AVFormatContext *s)
1404 MatroskaMuxContext *mkv = s->priv_data;
1405 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1406 ebml_master editionentry;
1407 AVRational scale = {1, 1E9};
1410 if (!s->nb_chapters || mkv->wrote_chapters)
1413 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1415 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1416 if (ret < 0) return ret;
1418 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1419 if (mkv->mode != MODE_WEBM) {
1420 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1422 for (i = 0; i < s->nb_chapters; i++) {
1423 ebml_master chapteratom, chapterdisplay;
1424 AVChapter *c = s->chapters[i];
1425 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1426 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1427 AVDictionaryEntry *t = NULL;
1428 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1429 av_log(s, AV_LOG_ERROR,
1430 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1431 chapterstart, chapterend);
1432 return AVERROR_INVALIDDATA;
1435 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1436 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1437 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1438 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1439 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1440 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1441 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1442 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1443 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1444 end_ebml_master(dyn_cp, chapterdisplay);
1446 end_ebml_master(dyn_cp, chapteratom);
1448 end_ebml_master(dyn_cp, editionentry);
1449 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1451 mkv->wrote_chapters = 1;
1455 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1457 uint8_t *key = av_strdup(t->key);
1459 const uint8_t *lang = NULL;
1463 return AVERROR(ENOMEM);
1465 if ((p = strrchr(p, '-')) &&
1466 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1473 else if (*p >= 'a' && *p <= 'z')
1478 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1479 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1481 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1482 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1483 end_ebml_master(pb, tag);
1489 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1490 uint64_t uid, ebml_master *tag)
1493 MatroskaMuxContext *mkv = s->priv_data;
1494 ebml_master targets;
1497 if (!mkv->tags_bc) {
1498 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1500 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1506 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1507 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1509 put_ebml_uid(pb, elementid, uid);
1510 end_ebml_master(pb, targets);
1514 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1516 return av_strcasecmp(name, "title") &&
1517 av_strcasecmp(name, "stereo_mode") &&
1518 av_strcasecmp(name, "creation_time") &&
1519 av_strcasecmp(name, "encoding_tool") &&
1520 av_strcasecmp(name, "duration") &&
1521 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1522 av_strcasecmp(name, "language")) &&
1523 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1524 (av_strcasecmp(name, "filename") &&
1525 av_strcasecmp(name, "mimetype")));
1528 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1529 uint64_t uid, ebml_master *tag)
1531 MatroskaMuxContext *mkv = s->priv_data;
1534 AVDictionaryEntry *t = NULL;
1536 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1540 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1541 if (mkv_check_tag_name(t->key, elementid)) {
1542 ret = mkv_write_simpletag(mkv->tags_bc, t);
1549 end_ebml_master(mkv->tags_bc, tag2);
1554 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1556 AVDictionaryEntry *t = NULL;
1558 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1559 if (mkv_check_tag_name(t->key, elementid))
1565 static int mkv_write_tags(AVFormatContext *s)
1567 MatroskaMuxContext *mkv = s->priv_data;
1568 ebml_master tag, *tagp;
1571 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1573 if (mkv_check_tag(s->metadata, 0)) {
1574 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1575 if (ret < 0) return ret;
1578 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1579 for (i = 0; i < s->nb_streams; i++) {
1580 AVStream *st = s->streams[i];
1581 mkv_track *track = &mkv->tracks[i];
1583 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1586 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1589 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1591 if (ret < 0) return ret;
1594 AVIOContext *pb = mkv->tags_bc;
1595 ebml_master simpletag;
1597 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1599 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1600 mkv->tracks[i].duration_offset = avio_tell(pb);
1602 // Reserve space to write duration as a 20-byte string.
1603 // 2 (ebml id) + 1 (data size) + 20 (data)
1604 put_ebml_void(pb, 23);
1605 end_ebml_master(pb, simpletag);
1606 end_ebml_master(pb, tag);
1610 if (mkv->mode != MODE_WEBM) {
1611 for (i = 0; i < s->nb_chapters; i++) {
1612 AVChapter *ch = s->chapters[i];
1614 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1617 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1618 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1625 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1626 for (i = 0; i < s->nb_streams; i++) {
1627 mkv_track *track = &mkv->tracks[i];
1628 AVStream *st = s->streams[i];
1630 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1633 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1636 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1644 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1645 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1646 MATROSKA_ID_TAGS, &mkv->tags_pos);
1648 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1653 static int mkv_write_attachments(AVFormatContext *s)
1655 MatroskaMuxContext *mkv = s->priv_data;
1656 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1659 if (!mkv->nb_attachments)
1662 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1664 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1665 if (ret < 0) return ret;
1667 for (i = 0; i < s->nb_streams; i++) {
1668 AVStream *st = s->streams[i];
1669 mkv_track *track = &mkv->tracks[i];
1670 ebml_master attached_file;
1671 AVDictionaryEntry *t;
1672 const char *mimetype = NULL;
1674 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1677 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1679 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1680 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1681 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1682 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1683 return AVERROR(EINVAL);
1685 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1686 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1687 mimetype = t->value;
1688 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1689 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1690 if (desc && desc->mime_types) {
1691 mimetype = desc->mime_types[0];
1692 } else if (st->codecpar->codec_id = AV_CODEC_ID_TEXT)
1693 mimetype = "text/plain";
1696 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1697 "it cannot be deduced from the codec id.\n", i);
1698 return AVERROR(EINVAL);
1701 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1702 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1703 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1704 end_ebml_master(dyn_cp, attached_file);
1706 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1711 static int64_t get_metadata_duration(AVFormatContext *s)
1717 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1718 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1719 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1723 for (i = 0; i < s->nb_streams; i++) {
1725 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1727 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1728 max = FFMAX(max, us);
1731 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1735 static int mkv_write_header(AVFormatContext *s)
1737 MatroskaMuxContext *mkv = s->priv_data;
1738 AVIOContext *pb = s->pb;
1739 ebml_master ebml_header;
1740 AVDictionaryEntry *tag;
1741 int ret, i, version = 2;
1742 int64_t creation_time;
1744 if (mkv->mode != MODE_WEBM ||
1745 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1746 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1749 for (i = 0; i < s->nb_streams; i++) {
1750 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1751 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1752 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1756 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1757 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1758 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1759 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1760 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1761 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1762 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1763 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1764 end_ebml_master(pb, ebml_header);
1766 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1767 mkv->segment_offset = avio_tell(pb);
1769 // we write a seek head at the beginning to point to all other level
1770 // one elements (except Clusters).
1771 mkv_start_seekhead(mkv, pb);
1773 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1775 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1780 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1781 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1782 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1783 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1784 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1785 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1786 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1788 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1790 if (mkv->mode != MODE_WEBM) {
1791 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1794 const char *ident = "Lavf";
1795 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1796 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1799 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1800 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1801 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1802 uint8_t date_utc_buf[8];
1803 AV_WB64(date_utc_buf, date_utc);
1804 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1807 // reserve space for the duration
1809 mkv->duration_offset = avio_tell(pb);
1810 if (!mkv->is_live) {
1811 int64_t metadata_duration = get_metadata_duration(s);
1813 if (s->duration > 0) {
1814 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1815 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1816 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1817 } else if (metadata_duration > 0) {
1818 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1819 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1820 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1822 put_ebml_void(pb, 11); // assumes double-precision float to be written
1825 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1826 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1827 MATROSKA_ID_INFO, &mkv->info_pos);
1829 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1832 ret = mkv_write_tracks(s);
1836 for (i = 0; i < s->nb_chapters; i++)
1837 if (!s->chapters[i]->id) {
1838 mkv->chapter_id_offset = 1;
1842 ret = mkv_write_chapters(s);
1846 if (mkv->mode != MODE_WEBM) {
1847 ret = mkv_write_attachments(s);
1852 ret = mkv_write_tags(s);
1856 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1857 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1862 if (s->metadata_header_padding > 0) {
1863 if (s->metadata_header_padding == 1)
1864 s->metadata_header_padding++;
1865 put_ebml_void(pb, s->metadata_header_padding);
1868 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1869 mkv->cues_pos = avio_tell(pb);
1870 if (mkv->reserve_cues_space == 1)
1871 mkv->reserve_cues_space++;
1872 put_ebml_void(pb, mkv->reserve_cues_space);
1875 av_init_packet(&mkv->cur_audio_pkt);
1876 mkv->cur_audio_pkt.size = 0;
1877 mkv->cluster_pos = -1;
1879 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1880 // after 4k and on a keyframe
1881 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1882 if (mkv->cluster_time_limit < 0)
1883 mkv->cluster_time_limit = 5000;
1884 if (mkv->cluster_size_limit < 0)
1885 mkv->cluster_size_limit = 5 * 1024 * 1024;
1887 if (mkv->cluster_time_limit < 0)
1888 mkv->cluster_time_limit = 1000;
1889 if (mkv->cluster_size_limit < 0)
1890 mkv->cluster_size_limit = 32 * 1024;
1896 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1898 int size = pkt_size + track_num_size + 3;
1899 size += ebml_length_size(size);
1900 size += 2; // EBML ID for block and block duration
1901 size += 9; // max size of block duration incl. length field
1905 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1912 dst = av_malloc(srclen);
1914 return AVERROR(ENOMEM);
1916 while (srclen >= WV_HEADER_SIZE) {
1919 ret = ff_wv_parse_header(&header, src);
1922 src += WV_HEADER_SIZE;
1923 srclen -= WV_HEADER_SIZE;
1925 if (srclen < header.blocksize) {
1926 ret = AVERROR_INVALIDDATA;
1930 if (header.initial) {
1931 AV_WL32(dst + offset, header.samples);
1934 AV_WL32(dst + offset, header.flags);
1935 AV_WL32(dst + offset + 4, header.crc);
1938 if (!(header.initial && header.final)) {
1939 AV_WL32(dst + offset, header.blocksize);
1943 memcpy(dst + offset, src, header.blocksize);
1944 src += header.blocksize;
1945 srclen -= header.blocksize;
1946 offset += header.blocksize;
1958 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1959 uint32_t blockid, AVPacket *pkt, int keyframe)
1961 MatroskaMuxContext *mkv = s->priv_data;
1962 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1963 mkv_track *track = &mkv->tracks[pkt->stream_index];
1964 uint8_t *data = NULL, *side_data = NULL;
1965 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1966 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1967 uint64_t additional_id;
1968 int64_t discard_padding = 0;
1969 unsigned track_number = track->track_num;
1970 ebml_master block_group, block_additions, block_more;
1972 ts += track->ts_offset;
1974 /* The following string is identical to the one in mkv_write_vtt_blocks
1975 * so that only one copy needs to exist in binaries. */
1976 av_log(s, AV_LOG_DEBUG,
1977 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1978 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1979 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
1980 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1981 mkv->cluster_pos, track_number, keyframe != 0);
1983 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1984 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1985 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1986 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1987 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1988 /* extradata is Annex B, assume the bitstream is too and convert it */
1989 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1990 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1991 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1992 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1993 err = mkv_strip_wavpack(pkt->data, &data, &size);
1998 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
1999 "a packet from stream %d.\n", pkt->stream_index);
2003 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2004 /* Matroska specification requires to remove the first QuickTime atom
2010 side_data = av_packet_get_side_data(pkt,
2011 AV_PKT_DATA_SKIP_SAMPLES,
2013 if (side_data && side_data_size >= 10) {
2014 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2015 (AVRational){1, par->sample_rate},
2016 (AVRational){1, 1000000000});
2019 side_data = av_packet_get_side_data(pkt,
2020 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2023 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2024 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2028 side_data_size -= 8;
2032 if (side_data_size || discard_padding) {
2033 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2034 blockid = MATROSKA_ID_BLOCK;
2037 put_ebml_id(pb, blockid);
2038 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2039 put_ebml_num(pb, track_number, track->track_num_size);
2040 avio_wb16(pb, ts - mkv->cluster_pts);
2041 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2042 avio_write(pb, data + offset, size);
2043 if (data != pkt->data)
2046 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2047 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2049 track->last_timestamp = ts;
2051 if (discard_padding) {
2052 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2055 if (side_data_size) {
2056 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2057 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2058 /* Until dbc50f8a our demuxer used a wrong default value
2059 * of BlockAddID, so we write it unconditionally. */
2060 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2061 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2062 side_data, side_data_size);
2063 end_ebml_master(pb, block_more);
2064 end_ebml_master(pb, block_additions);
2066 if (side_data_size || discard_padding) {
2067 end_ebml_master(pb, block_group);
2073 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2075 MatroskaMuxContext *mkv = s->priv_data;
2076 mkv_track *track = &mkv->tracks[pkt->stream_index];
2077 ebml_master blockgroup;
2078 int id_size, settings_size, size;
2079 uint8_t *id, *settings;
2080 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2081 const int flags = 0;
2084 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2088 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2091 size = id_size + 1 + settings_size + 1 + pkt->size;
2093 /* The following string is identical to the one in mkv_write_block so that
2094 * only one copy needs to exist in binaries. */
2095 av_log(s, AV_LOG_DEBUG,
2096 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2097 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2098 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2099 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2100 mkv->cluster_pos, track->track_num, 1);
2102 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2103 mkv_blockgroup_size(size, track->track_num_size));
2105 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2106 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2107 put_ebml_num(pb, track->track_num, track->track_num_size);
2108 avio_wb16(pb, ts - mkv->cluster_pts);
2110 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2112 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2113 end_ebml_master(pb, blockgroup);
2115 return pkt->duration;
2118 static void mkv_end_cluster(AVFormatContext *s)
2120 MatroskaMuxContext *mkv = s->priv_data;
2122 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2123 if (!mkv->have_video) {
2124 for (unsigned i = 0; i < s->nb_streams; i++)
2125 mkv->tracks[i].has_cue = 0;
2127 mkv->cluster_pos = -1;
2128 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2131 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2133 MatroskaMuxContext *mkv = s->priv_data;
2134 mkv_track *track = &mkv->tracks[pkt->stream_index];
2135 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2137 int side_data_size = 0, ret;
2139 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2142 switch (par->codec_id) {
2143 case AV_CODEC_ID_AAC:
2144 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2145 int filler, output_sample_rate = 0;
2146 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2147 &output_sample_rate);
2150 if (!output_sample_rate)
2151 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2152 ret = ff_alloc_extradata(par, side_data_size);
2155 memcpy(par->extradata, side_data, side_data_size);
2156 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2157 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2158 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2160 put_ebml_void(mkv->tracks_bc, filler);
2161 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2162 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2163 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2164 } else if (!par->extradata_size && !track->sample_rate) {
2165 // No extradata (codecpar or packet side data).
2166 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2167 return AVERROR(EINVAL);
2170 case AV_CODEC_ID_FLAC:
2171 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2172 AVCodecParameters *codecpriv_par;
2173 if (side_data_size != par->extradata_size) {
2174 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2176 return AVERROR(EINVAL);
2178 codecpriv_par = avcodec_parameters_alloc();
2180 return AVERROR(ENOMEM);
2181 ret = avcodec_parameters_copy(codecpriv_par, par);
2183 avcodec_parameters_free(&codecpriv_par);
2186 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2187 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2188 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2189 avcodec_parameters_free(&codecpriv_par);
2192 // FIXME: Remove the following once libaom starts propagating extradata during init()
2193 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2194 case AV_CODEC_ID_AV1:
2195 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2196 !par->extradata_size) {
2197 AVIOContext *dyn_cp;
2200 ret = avio_open_dyn_buf(&dyn_cp);
2203 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2204 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2205 if (!codecpriv_size) {
2207 return AVERROR_INVALIDDATA;
2209 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2210 // Do not write the OBUs as we don't have space saved for them
2211 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2213 ret = ff_alloc_extradata(par, side_data_size);
2216 memcpy(par->extradata, side_data, side_data_size);
2217 } else if (!par->extradata_size)
2218 return AVERROR_INVALIDDATA;
2222 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2229 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
2231 MatroskaMuxContext *mkv = s->priv_data;
2233 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2234 mkv_track *track = &mkv->tracks[pkt->stream_index];
2235 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2236 int duration = pkt->duration;
2238 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2239 int64_t relative_packet_pos;
2241 if (ts == AV_NOPTS_VALUE) {
2242 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2243 return AVERROR(EINVAL);
2245 ts += track->ts_offset;
2247 if (mkv->cluster_pos != -1) {
2248 int64_t cluster_time = ts - mkv->cluster_pts;
2249 if ((int16_t)cluster_time != cluster_time) {
2251 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2255 if (mkv->cluster_pos == -1) {
2256 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2259 mkv->cluster_pos = avio_tell(s->pb);
2260 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2261 mkv->cluster_pts = FFMAX(0, ts);
2262 av_log(s, AV_LOG_DEBUG,
2263 "Starting new cluster with timestamp "
2264 "%" PRId64 " at offset %" PRId64 " bytes\n",
2265 mkv->cluster_pts, mkv->cluster_pos);
2267 pb = mkv->cluster_bc;
2269 relative_packet_pos = avio_tell(pb);
2271 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2272 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2275 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
2276 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2277 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2278 mkv->cluster_pos, relative_packet_pos, -1);
2279 if (ret < 0) return ret;
2283 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2284 duration = mkv_write_vtt_blocks(s, pb, pkt);
2286 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2287 mkv_blockgroup_size(pkt->size,
2288 track->track_num_size));
2290 #if FF_API_CONVERGENCE_DURATION
2291 FF_DISABLE_DEPRECATION_WARNINGS
2292 /* For backward compatibility, prefer convergence_duration. */
2293 if (pkt->convergence_duration > 0) {
2294 duration = pkt->convergence_duration;
2296 FF_ENABLE_DEPRECATION_WARNINGS
2298 /* All subtitle blocks are considered to be keyframes. */
2299 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2300 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2301 end_ebml_master(pb, blockgroup);
2304 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2305 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2306 mkv->cluster_pos, relative_packet_pos, duration);
2312 mkv->duration = FFMAX(mkv->duration, ts + duration);
2313 track->duration = FFMAX(track->duration, ts + duration);
2318 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2320 MatroskaMuxContext *mkv = s->priv_data;
2321 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2322 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2324 int64_t cluster_time;
2326 int start_new_cluster;
2328 ret = mkv_check_new_extra_data(s, pkt);
2332 if (mkv->cluster_pos != -1) {
2333 if (mkv->tracks[pkt->stream_index].write_dts)
2334 cluster_time = pkt->dts - mkv->cluster_pts;
2336 cluster_time = pkt->pts - mkv->cluster_pts;
2337 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2339 cluster_size = avio_tell(mkv->cluster_bc);
2341 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2342 // WebM DASH specification states that the first block of every cluster
2343 // has to be a key frame. So for DASH video, we only create a cluster
2344 // on seeing key frames.
2345 start_new_cluster = keyframe;
2346 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2347 cluster_time > mkv->cluster_time_limit) {
2348 // For DASH audio, we create a Cluster based on cluster_time_limit
2349 start_new_cluster = 1;
2350 } else if (!mkv->is_dash &&
2351 (cluster_size > mkv->cluster_size_limit ||
2352 cluster_time > mkv->cluster_time_limit ||
2353 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2354 cluster_size > 4 * 1024))) {
2355 start_new_cluster = 1;
2357 start_new_cluster = 0;
2360 if (start_new_cluster) {
2365 if (!mkv->cluster_pos)
2366 avio_write_marker(s->pb,
2367 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2368 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2370 // check if we have an audio packet cached
2371 if (mkv->cur_audio_pkt.size > 0) {
2372 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2373 av_packet_unref(&mkv->cur_audio_pkt);
2375 av_log(s, AV_LOG_ERROR,
2376 "Could not write cached audio packet ret:%d\n", ret);
2381 // buffer an audio packet to ensure the packet containing the video
2382 // keyframe's timecode is contained in the same cluster for WebM
2383 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2385 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2387 ret = mkv_write_packet_internal(s, pkt);
2391 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2393 MatroskaMuxContext *mkv = s->priv_data;
2396 if (mkv->cluster_pos != -1) {
2398 av_log(s, AV_LOG_DEBUG,
2399 "Flushing cluster at offset %" PRIu64 " bytes\n",
2404 return mkv_write_packet(s, pkt);
2407 static int mkv_write_trailer(AVFormatContext *s)
2409 MatroskaMuxContext *mkv = s->priv_data;
2410 AVIOContext *pb = s->pb;
2413 // check if we have an audio packet cached
2414 if (mkv->cur_audio_pkt.size > 0) {
2415 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2417 av_log(s, AV_LOG_ERROR,
2418 "Could not write cached audio packet ret:%d\n", ret);
2423 if (mkv->cluster_bc) {
2424 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2425 MATROSKA_ID_CLUSTER, 0, 0);
2428 ret = mkv_write_chapters(s);
2433 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2434 int64_t endpos, ret64;
2436 endpos = avio_tell(pb);
2438 if (mkv->cues.num_entries) {
2439 AVIOContext *cues = NULL;
2441 int64_t cuespos = endpos;
2442 int length_size = 0;
2444 ret = start_ebml_master_crc32(&cues, mkv);
2448 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2449 mkv->tracks, s->nb_streams);
2451 ffio_free_dyn_buf(&cues);
2455 if (mkv->reserve_cues_space) {
2456 size = avio_tell(cues);
2457 length_size = ebml_length_size(size);
2458 size += 4 + length_size;
2459 if (mkv->reserve_cues_space < size) {
2460 av_log(s, AV_LOG_WARNING,
2461 "Insufficient space reserved for Cues: "
2462 "%d < %"PRIu64". No Cues will be output.\n",
2463 mkv->reserve_cues_space, size);
2464 mkv->reserve_cues_space = -1;
2465 ffio_free_dyn_buf(&cues);
2468 cuespos = mkv->cues_pos;
2469 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2470 ffio_free_dyn_buf(&cues);
2473 if (mkv->reserve_cues_space == size + 1) {
2474 /* There is no way to reserve a single byte because
2475 * the minimal size of an EBML Void element is 2
2476 * (1 byte ID, 1 byte length field). This problem
2477 * is solved by writing the Cues' length field on
2478 * one byte more than necessary. */
2484 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2485 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2487 if (mkv->reserve_cues_space) {
2488 if (size < mkv->reserve_cues_space)
2489 put_ebml_void(pb, mkv->reserve_cues_space - size);
2491 endpos = avio_tell(pb);
2495 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2499 // update the duration
2500 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2501 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2502 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2503 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2505 if (mkv->tracks_bc) {
2506 // write Tracks master
2507 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2508 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv,
2509 MATROSKA_ID_TRACKS, 0, 0);
2512 // update stream durations
2515 for (i = 0; i < s->nb_streams; ++i) {
2516 AVStream *st = s->streams[i];
2517 mkv_track *track = &mkv->tracks[i];
2519 if (track->duration_offset > 0) {
2520 double duration_sec = track->duration * av_q2d(st->time_base);
2521 char duration_string[20] = "";
2523 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2526 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2528 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2529 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2530 fmod(duration_sec, 60));
2532 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2536 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2537 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2540 avio_seek(pb, endpos, SEEK_SET);
2543 if (!mkv->is_live) {
2544 end_ebml_master(pb, mkv->segment);
2547 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2550 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2553 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2554 if (ff_mkv_codec_tags[i].id == codec_id)
2557 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2558 enum AVMediaType type = avcodec_get_type(codec_id);
2559 // mkv theoretically supports any video/audio through VFW/ACM
2560 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2567 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2570 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2571 if (ff_webm_codec_tags[i].id == codec_id)
2577 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2582 uid = (uint64_t)av_lfg_get(c) << 32;
2583 uid |= av_lfg_get(c);
2586 for (k = 0; k < i; k++) {
2587 if (tracks[k].uid == uid)
2595 static int mkv_init(struct AVFormatContext *s)
2597 MatroskaMuxContext *mkv = s->priv_data;
2599 unsigned nb_tracks = 0;
2602 for (i = 0; i < s->nb_streams; i++) {
2603 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2604 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2605 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2606 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2607 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2608 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2609 av_log(s, AV_LOG_ERROR,
2610 "The Matroska muxer does not yet support muxing %s\n",
2611 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2612 return AVERROR_PATCHWELCOME;
2616 if (s->avoid_negative_ts < 0) {
2617 s->avoid_negative_ts = 1;
2618 s->internal->avoid_negative_ts_use_pts = 1;
2621 if (!strcmp(s->oformat->name, "webm")) {
2622 mkv->mode = MODE_WEBM;
2625 mkv->mode = MODE_MATROSKAv2;
2627 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2629 return AVERROR(ENOMEM);
2632 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2633 av_lfg_init(&c, av_get_random_seed());
2635 // Calculate the SegmentUID now in order not to waste our random seed.
2636 for (i = 0; i < 4; i++)
2637 mkv->segment_uid[i] = av_lfg_get(&c);
2640 for (i = 0; i < s->nb_streams; i++) {
2641 AVStream *st = s->streams[i];
2642 mkv_track *track = &mkv->tracks[i];
2644 if (s->flags & AVFMT_FLAG_BITEXACT) {
2647 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2650 // ms precision is the de-facto standard timescale for mkv files
2651 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2653 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2654 if (mkv->mode == MODE_WEBM) {
2655 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2656 "as WebM doesn't support attachments.\n", i);
2658 mkv->nb_attachments++;
2663 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2664 track->track_num_size = ebml_num_size(track->track_num);
2667 if (mkv->is_dash && nb_tracks != 1)
2668 return AVERROR(EINVAL);
2673 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2676 AVStream *st = s->streams[pkt->stream_index];
2678 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2679 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2680 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2681 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2682 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2688 static const AVCodecTag additional_audio_tags[] = {
2689 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2690 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2691 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2692 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2693 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2694 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2695 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2696 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2697 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2698 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2699 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2700 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2701 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2704 static const AVCodecTag additional_video_tags[] = {
2705 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2706 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2707 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2708 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2711 static const AVCodecTag additional_subtitle_tags[] = {
2712 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2713 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2714 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2715 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2718 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2719 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2720 static const AVOption options[] = {
2721 { "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 },
2722 { "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 },
2723 { "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 },
2724 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2725 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2726 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2727 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2728 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2732 #if CONFIG_MATROSKA_MUXER
2733 static const AVClass matroska_class = {
2734 .class_name = "matroska muxer",
2735 .item_name = av_default_item_name,
2737 .version = LIBAVUTIL_VERSION_INT,
2740 AVOutputFormat ff_matroska_muxer = {
2742 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2743 .mime_type = "video/x-matroska",
2744 .extensions = "mkv",
2745 .priv_data_size = sizeof(MatroskaMuxContext),
2746 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2747 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2748 .video_codec = CONFIG_LIBX264_ENCODER ?
2749 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2751 .deinit = mkv_deinit,
2752 .write_header = mkv_write_header,
2753 .write_packet = mkv_write_flush_packet,
2754 .write_trailer = mkv_write_trailer,
2755 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2756 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2757 .codec_tag = (const AVCodecTag* const []){
2758 ff_codec_bmp_tags, ff_codec_wav_tags,
2759 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2761 .subtitle_codec = AV_CODEC_ID_ASS,
2762 .query_codec = mkv_query_codec,
2763 .check_bitstream = mkv_check_bitstream,
2764 .priv_class = &matroska_class,
2768 #if CONFIG_WEBM_MUXER
2769 static const AVClass webm_class = {
2770 .class_name = "webm muxer",
2771 .item_name = av_default_item_name,
2773 .version = LIBAVUTIL_VERSION_INT,
2776 AVOutputFormat ff_webm_muxer = {
2778 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2779 .mime_type = "video/webm",
2780 .extensions = "webm",
2781 .priv_data_size = sizeof(MatroskaMuxContext),
2782 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2783 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2784 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2786 .deinit = mkv_deinit,
2787 .write_header = mkv_write_header,
2788 .write_packet = mkv_write_flush_packet,
2789 .write_trailer = mkv_write_trailer,
2790 .query_codec = webm_query_codec,
2791 .check_bitstream = mkv_check_bitstream,
2792 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2793 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2794 .priv_class = &webm_class,
2798 #if CONFIG_MATROSKA_AUDIO_MUXER
2799 static const AVClass mka_class = {
2800 .class_name = "matroska audio muxer",
2801 .item_name = av_default_item_name,
2803 .version = LIBAVUTIL_VERSION_INT,
2805 AVOutputFormat ff_matroska_audio_muxer = {
2807 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2808 .mime_type = "audio/x-matroska",
2809 .extensions = "mka",
2810 .priv_data_size = sizeof(MatroskaMuxContext),
2811 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2812 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2813 .video_codec = AV_CODEC_ID_NONE,
2815 .deinit = mkv_deinit,
2816 .write_header = mkv_write_header,
2817 .write_packet = mkv_write_flush_packet,
2818 .write_trailer = mkv_write_trailer,
2819 .check_bitstream = mkv_check_bitstream,
2820 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2822 .codec_tag = (const AVCodecTag* const []){
2823 ff_codec_wav_tags, additional_audio_tags, 0
2825 .priv_class = &mka_class,