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 int have_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, 0);
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) {
1116 mkv->have_attachments = 1;
1120 if (par->codec_id == AV_CODEC_ID_AAC) {
1121 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1122 &output_sample_rate);
1127 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1128 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1129 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1130 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1132 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1133 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1134 tag = av_dict_get(st->metadata, "language", NULL, 0);
1135 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1136 tag && tag->value ? tag->value : "und");
1138 // The default value for TRACKFLAGDEFAULT is 1, so add element
1139 // if we need to clear it.
1140 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1141 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1143 if (st->disposition & AV_DISPOSITION_FORCED)
1144 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1146 if (mkv->mode == MODE_WEBM) {
1147 const char *codec_id;
1148 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1149 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1150 if (ff_webm_codec_tags[j].id == par->codec_id) {
1151 codec_id = ff_webm_codec_tags[j].str;
1156 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1157 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1158 codec_id = "D_WEBVTT/CAPTIONS";
1159 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1160 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1161 codec_id = "D_WEBVTT/DESCRIPTIONS";
1162 native_id = MATROSKA_TRACK_TYPE_METADATA;
1163 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1164 codec_id = "D_WEBVTT/METADATA";
1165 native_id = MATROSKA_TRACK_TYPE_METADATA;
1167 codec_id = "D_WEBVTT/SUBTITLES";
1168 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1173 av_log(s, AV_LOG_ERROR,
1174 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1175 return AVERROR(EINVAL);
1178 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1180 // look for a codec ID string specific to mkv to use,
1181 // if none are found, use AVI codes
1182 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1183 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1184 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1185 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1191 if (mkv->allow_raw_vfw) {
1194 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1195 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1196 return AVERROR(EINVAL);
1201 switch (par->codec_type) {
1202 case AVMEDIA_TYPE_VIDEO:
1203 mkv->have_video = 1;
1204 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1206 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1207 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1208 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1209 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1210 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1211 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1214 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1215 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1216 par->codec_id == AV_CODEC_ID_SVQ1 ||
1217 par->codec_id == AV_CODEC_ID_SVQ3 ||
1218 par->codec_id == AV_CODEC_ID_CINEPAK))
1222 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1223 else if (!native_id) {
1224 // if there is no mkv-specific codec ID, use VFW mode
1225 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1226 track->write_dts = 1;
1227 s->internal->avoid_negative_ts_use_pts = 0;
1230 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1232 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1233 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1235 mkv_write_field_order(pb, mkv->mode, par->field_order);
1237 // check both side data and metadata for stereo information,
1238 // write the result to the bitstream if any is found
1239 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1241 &display_height_div);
1245 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1246 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1247 (par->format == AV_PIX_FMT_YUVA420P)) {
1248 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1251 // write DisplayWidth and DisplayHeight, they contain the size of
1252 // a single source view and/or the display aspect ratio
1253 if (st->sample_aspect_ratio.num) {
1254 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1255 if (d_width > INT_MAX) {
1256 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1257 return AVERROR(EINVAL);
1259 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1260 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1261 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1262 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1264 AVRational display_aspect_ratio;
1265 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1266 par->width * (int64_t)st->sample_aspect_ratio.num,
1267 par->height * (int64_t)st->sample_aspect_ratio.den,
1269 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1270 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1271 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1274 } else if (display_width_div != 1 || display_height_div != 1) {
1275 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1276 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1277 } else if (mkv->mode != MODE_WEBM)
1278 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1280 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1281 uint32_t color_space = av_le2ne32(par->codec_tag);
1282 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1284 ret = mkv_write_video_color(pb, par, st);
1287 ret = mkv_write_video_projection(s, pb, st);
1290 end_ebml_master(pb, subinfo);
1293 case AVMEDIA_TYPE_AUDIO:
1294 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1295 int64_t codecdelay = av_rescale_q(par->initial_padding,
1296 (AVRational){ 1, 48000 },
1297 (AVRational){ 1, 1000000000 });
1298 if (codecdelay < 0) {
1299 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1300 return AVERROR(EINVAL);
1302 // track->ts_offset = av_rescale_q(par->initial_padding,
1303 // (AVRational){ 1, par->sample_rate },
1306 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1308 if (par->codec_id == AV_CODEC_ID_OPUS)
1309 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1311 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1314 // no mkv-specific ID, use ACM mode
1315 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1317 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1318 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1320 track->sample_rate_offset = avio_tell(pb);
1321 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1322 if (output_sample_rate)
1323 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1325 bit_depth = av_get_bits_per_sample(par->codec_id);
1326 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1327 if (par->bits_per_raw_sample)
1328 bit_depth = par->bits_per_raw_sample;
1330 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1333 bit_depth = par->bits_per_coded_sample;
1335 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1336 end_ebml_master(pb, subinfo);
1339 case AVMEDIA_TYPE_SUBTITLE:
1341 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1342 return AVERROR(ENOSYS);
1345 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1346 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1348 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1351 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1352 return AVERROR(EINVAL);
1355 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1356 track->codecpriv_offset = avio_tell(pb);
1357 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1362 end_ebml_master(pb, track_master);
1367 static int mkv_write_tracks(AVFormatContext *s)
1369 MatroskaMuxContext *mkv = s->priv_data;
1370 AVIOContext *pb = s->pb;
1371 int i, ret, default_stream_exists = 0;
1373 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1375 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1379 for (i = 0; i < s->nb_streams; i++) {
1380 AVStream *st = s->streams[i];
1381 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1383 for (i = 0; i < s->nb_streams; i++) {
1384 AVStream *st = s->streams[i];
1385 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1386 mkv->tracks_bc, default_stream_exists);
1391 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1392 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1393 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1395 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1400 static int mkv_write_chapters(AVFormatContext *s)
1402 MatroskaMuxContext *mkv = s->priv_data;
1403 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1404 ebml_master editionentry;
1405 AVRational scale = {1, 1E9};
1408 if (!s->nb_chapters || mkv->wrote_chapters)
1411 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1413 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1414 if (ret < 0) return ret;
1416 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1417 if (mkv->mode != MODE_WEBM) {
1418 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1420 for (i = 0; i < s->nb_chapters; i++) {
1421 ebml_master chapteratom, chapterdisplay;
1422 AVChapter *c = s->chapters[i];
1423 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1424 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1425 AVDictionaryEntry *t = NULL;
1426 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1427 av_log(s, AV_LOG_ERROR,
1428 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1429 chapterstart, chapterend);
1430 return AVERROR_INVALIDDATA;
1433 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1434 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1435 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1436 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1437 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1438 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1439 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1440 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1441 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1442 end_ebml_master(dyn_cp, chapterdisplay);
1444 end_ebml_master(dyn_cp, chapteratom);
1446 end_ebml_master(dyn_cp, editionentry);
1447 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1449 mkv->wrote_chapters = 1;
1453 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1455 uint8_t *key = av_strdup(t->key);
1457 const uint8_t *lang = NULL;
1461 return AVERROR(ENOMEM);
1463 if ((p = strrchr(p, '-')) &&
1464 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1471 else if (*p >= 'a' && *p <= 'z')
1476 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1477 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1479 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1480 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1481 end_ebml_master(pb, tag);
1487 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1488 uint64_t uid, ebml_master *tag)
1491 MatroskaMuxContext *mkv = s->priv_data;
1492 ebml_master targets;
1495 if (!mkv->tags_bc) {
1496 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1498 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1504 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1505 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1507 put_ebml_uid(pb, elementid, uid);
1508 end_ebml_master(pb, targets);
1512 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1514 return av_strcasecmp(name, "title") &&
1515 av_strcasecmp(name, "stereo_mode") &&
1516 av_strcasecmp(name, "creation_time") &&
1517 av_strcasecmp(name, "encoding_tool") &&
1518 av_strcasecmp(name, "duration") &&
1519 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1520 av_strcasecmp(name, "language")) &&
1521 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1522 (av_strcasecmp(name, "filename") &&
1523 av_strcasecmp(name, "mimetype")));
1526 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1527 uint64_t uid, ebml_master *tag)
1529 MatroskaMuxContext *mkv = s->priv_data;
1532 AVDictionaryEntry *t = NULL;
1534 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1538 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1539 if (mkv_check_tag_name(t->key, elementid)) {
1540 ret = mkv_write_simpletag(mkv->tags_bc, t);
1547 end_ebml_master(mkv->tags_bc, tag2);
1552 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1554 AVDictionaryEntry *t = NULL;
1556 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1557 if (mkv_check_tag_name(t->key, elementid))
1563 static int mkv_write_tags(AVFormatContext *s)
1565 MatroskaMuxContext *mkv = s->priv_data;
1566 ebml_master tag, *tagp;
1569 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1571 if (mkv_check_tag(s->metadata, 0)) {
1572 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1573 if (ret < 0) return ret;
1576 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1577 for (i = 0; i < s->nb_streams; i++) {
1578 AVStream *st = s->streams[i];
1579 mkv_track *track = &mkv->tracks[i];
1581 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1584 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1587 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1589 if (ret < 0) return ret;
1592 AVIOContext *pb = mkv->tags_bc;
1593 ebml_master simpletag;
1595 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1596 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1597 mkv->tracks[i].duration_offset = avio_tell(pb);
1599 // Reserve space to write duration as a 20-byte string.
1600 // 2 (ebml id) + 1 (data size) + 20 (data)
1601 put_ebml_void(pb, 23);
1602 end_ebml_master(pb, simpletag);
1603 end_ebml_master(pb, tag);
1607 if (mkv->mode != MODE_WEBM) {
1608 for (i = 0; i < s->nb_chapters; i++) {
1609 AVChapter *ch = s->chapters[i];
1611 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1614 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1615 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1622 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1623 for (i = 0; i < s->nb_streams; i++) {
1624 mkv_track *track = &mkv->tracks[i];
1625 AVStream *st = s->streams[i];
1627 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1630 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1633 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1641 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1642 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1643 MATROSKA_ID_TAGS, &mkv->tags_pos);
1645 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1650 static int mkv_write_attachments(AVFormatContext *s)
1652 MatroskaMuxContext *mkv = s->priv_data;
1653 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1656 if (!mkv->have_attachments)
1659 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1661 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1662 if (ret < 0) return ret;
1664 for (i = 0; i < s->nb_streams; i++) {
1665 AVStream *st = s->streams[i];
1666 mkv_track *track = &mkv->tracks[i];
1667 ebml_master attached_file;
1668 AVDictionaryEntry *t;
1669 const char *mimetype = NULL;
1671 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1674 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1676 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1677 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1678 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1679 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1680 return AVERROR(EINVAL);
1682 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1683 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1684 mimetype = t->value;
1685 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1686 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1687 if (desc && desc->mime_types) {
1688 mimetype = desc->mime_types[0];
1689 } else if (st->codecpar->codec_id = AV_CODEC_ID_TEXT)
1690 mimetype = "text/plain";
1693 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1694 "it cannot be deduced from the codec id.\n", i);
1695 return AVERROR(EINVAL);
1698 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1699 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1700 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1701 end_ebml_master(dyn_cp, attached_file);
1703 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1708 static int64_t get_metadata_duration(AVFormatContext *s)
1714 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1715 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1716 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1720 for (i = 0; i < s->nb_streams; i++) {
1722 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1724 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1725 max = FFMAX(max, us);
1728 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1732 static int mkv_write_header(AVFormatContext *s)
1734 MatroskaMuxContext *mkv = s->priv_data;
1735 AVIOContext *pb = s->pb;
1736 ebml_master ebml_header;
1737 AVDictionaryEntry *tag;
1738 int ret, i, version = 2;
1739 int64_t creation_time;
1741 if (!strcmp(s->oformat->name, "webm")) {
1742 mkv->mode = MODE_WEBM;
1745 mkv->mode = MODE_MATROSKAv2;
1747 if (mkv->mode != MODE_WEBM ||
1748 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1749 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1752 for (i = 0; i < s->nb_streams; i++) {
1753 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1754 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1755 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1759 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1760 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1761 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1762 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1763 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1764 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1765 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1766 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1767 end_ebml_master(pb, ebml_header);
1769 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1770 mkv->segment_offset = avio_tell(pb);
1772 // we write a seek head at the beginning to point to all other level
1773 // one elements (except Clusters).
1774 mkv_start_seekhead(mkv, pb);
1776 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1778 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1783 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1784 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1785 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1786 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1787 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1788 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1789 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1791 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1793 if (mkv->mode != MODE_WEBM) {
1794 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1797 const char *ident = "Lavf";
1798 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1799 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1802 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1803 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1804 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1805 uint8_t date_utc_buf[8];
1806 AV_WB64(date_utc_buf, date_utc);
1807 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1810 // reserve space for the duration
1812 mkv->duration_offset = avio_tell(pb);
1813 if (!mkv->is_live) {
1814 int64_t metadata_duration = get_metadata_duration(s);
1816 if (s->duration > 0) {
1817 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1818 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1819 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1820 } else if (metadata_duration > 0) {
1821 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1822 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1823 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1825 put_ebml_void(pb, 11); // assumes double-precision float to be written
1828 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1829 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1830 MATROSKA_ID_INFO, &mkv->info_pos);
1832 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1835 ret = mkv_write_tracks(s);
1839 for (i = 0; i < s->nb_chapters; i++)
1840 if (!s->chapters[i]->id) {
1841 mkv->chapter_id_offset = 1;
1845 ret = mkv_write_chapters(s);
1849 if (mkv->mode != MODE_WEBM) {
1850 ret = mkv_write_attachments(s);
1855 ret = mkv_write_tags(s);
1859 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1860 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1865 if (s->metadata_header_padding > 0) {
1866 if (s->metadata_header_padding == 1)
1867 s->metadata_header_padding++;
1868 put_ebml_void(pb, s->metadata_header_padding);
1871 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1872 mkv->cues_pos = avio_tell(pb);
1873 if (mkv->reserve_cues_space == 1)
1874 mkv->reserve_cues_space++;
1875 put_ebml_void(pb, mkv->reserve_cues_space);
1878 av_init_packet(&mkv->cur_audio_pkt);
1879 mkv->cur_audio_pkt.size = 0;
1880 mkv->cluster_pos = -1;
1882 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1883 // after 4k and on a keyframe
1884 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1885 if (mkv->cluster_time_limit < 0)
1886 mkv->cluster_time_limit = 5000;
1887 if (mkv->cluster_size_limit < 0)
1888 mkv->cluster_size_limit = 5 * 1024 * 1024;
1890 if (mkv->cluster_time_limit < 0)
1891 mkv->cluster_time_limit = 1000;
1892 if (mkv->cluster_size_limit < 0)
1893 mkv->cluster_size_limit = 32 * 1024;
1899 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1901 int size = pkt_size + track_num_size + 3;
1902 size += ebml_length_size(size);
1903 size += 2; // EBML ID for block and block duration
1904 size += 9; // max size of block duration incl. length field
1908 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1915 dst = av_malloc(srclen);
1917 return AVERROR(ENOMEM);
1919 while (srclen >= WV_HEADER_SIZE) {
1922 ret = ff_wv_parse_header(&header, src);
1925 src += WV_HEADER_SIZE;
1926 srclen -= WV_HEADER_SIZE;
1928 if (srclen < header.blocksize) {
1929 ret = AVERROR_INVALIDDATA;
1933 if (header.initial) {
1934 AV_WL32(dst + offset, header.samples);
1937 AV_WL32(dst + offset, header.flags);
1938 AV_WL32(dst + offset + 4, header.crc);
1941 if (!(header.initial && header.final)) {
1942 AV_WL32(dst + offset, header.blocksize);
1946 memcpy(dst + offset, src, header.blocksize);
1947 src += header.blocksize;
1948 srclen -= header.blocksize;
1949 offset += header.blocksize;
1961 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1962 uint32_t blockid, AVPacket *pkt, int keyframe)
1964 MatroskaMuxContext *mkv = s->priv_data;
1965 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1966 mkv_track *track = &mkv->tracks[pkt->stream_index];
1967 uint8_t *data = NULL, *side_data = NULL;
1968 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1969 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1970 uint64_t additional_id;
1971 int64_t discard_padding = 0;
1972 unsigned track_number = track->track_num;
1973 ebml_master block_group, block_additions, block_more;
1975 ts += track->ts_offset;
1977 /* The following string is identical to the one in mkv_write_vtt_blocks
1978 * so that only one copy needs to exist in binaries. */
1979 av_log(s, AV_LOG_DEBUG,
1980 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1981 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1982 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
1983 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1984 mkv->cluster_pos, track_number, keyframe != 0);
1986 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1987 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1988 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1989 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1990 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1991 /* extradata is Annex B, assume the bitstream is too and convert it */
1992 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1993 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1994 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1995 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1996 err = mkv_strip_wavpack(pkt->data, &data, &size);
2001 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2002 "a packet from stream %d.\n", pkt->stream_index);
2006 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2007 /* Matroska specification requires to remove the first QuickTime atom
2013 side_data = av_packet_get_side_data(pkt,
2014 AV_PKT_DATA_SKIP_SAMPLES,
2016 if (side_data && side_data_size >= 10) {
2017 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2018 (AVRational){1, par->sample_rate},
2019 (AVRational){1, 1000000000});
2022 side_data = av_packet_get_side_data(pkt,
2023 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2026 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2027 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2031 side_data_size -= 8;
2035 if (side_data_size || discard_padding) {
2036 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2037 blockid = MATROSKA_ID_BLOCK;
2040 put_ebml_id(pb, blockid);
2041 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2042 put_ebml_num(pb, track_number, track->track_num_size);
2043 avio_wb16(pb, ts - mkv->cluster_pts);
2044 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2045 avio_write(pb, data + offset, size);
2046 if (data != pkt->data)
2049 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2050 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2052 track->last_timestamp = ts;
2054 if (discard_padding) {
2055 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2058 if (side_data_size) {
2059 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2060 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2061 /* Until dbc50f8a our demuxer used a wrong default value
2062 * of BlockAddID, so we write it unconditionally. */
2063 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2064 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2065 side_data, side_data_size);
2066 end_ebml_master(pb, block_more);
2067 end_ebml_master(pb, block_additions);
2069 if (side_data_size || discard_padding) {
2070 end_ebml_master(pb, block_group);
2076 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2078 MatroskaMuxContext *mkv = s->priv_data;
2079 mkv_track *track = &mkv->tracks[pkt->stream_index];
2080 ebml_master blockgroup;
2081 int id_size, settings_size, size;
2082 uint8_t *id, *settings;
2083 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2084 const int flags = 0;
2087 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2091 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2094 size = id_size + 1 + settings_size + 1 + pkt->size;
2096 /* The following string is identical to the one in mkv_write_block so that
2097 * only one copy needs to exist in binaries. */
2098 av_log(s, AV_LOG_DEBUG,
2099 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2100 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2101 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2102 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2103 mkv->cluster_pos, track->track_num, 1);
2105 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2106 mkv_blockgroup_size(size, track->track_num_size));
2108 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2109 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2110 put_ebml_num(pb, track->track_num, track->track_num_size);
2111 avio_wb16(pb, ts - mkv->cluster_pts);
2113 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2115 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2116 end_ebml_master(pb, blockgroup);
2118 return pkt->duration;
2121 static void mkv_end_cluster(AVFormatContext *s)
2123 MatroskaMuxContext *mkv = s->priv_data;
2125 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2126 mkv->cluster_pos = -1;
2127 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2130 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2132 MatroskaMuxContext *mkv = s->priv_data;
2133 mkv_track *track = &mkv->tracks[pkt->stream_index];
2134 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2136 int side_data_size = 0, ret;
2138 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2141 switch (par->codec_id) {
2142 case AV_CODEC_ID_AAC:
2143 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2144 int filler, output_sample_rate = 0;
2145 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2146 &output_sample_rate);
2149 if (!output_sample_rate)
2150 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2151 ret = ff_alloc_extradata(par, side_data_size);
2154 memcpy(par->extradata, side_data, side_data_size);
2155 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2156 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2157 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2159 put_ebml_void(mkv->tracks_bc, filler);
2160 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2161 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2162 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2163 } else if (!par->extradata_size && !track->sample_rate) {
2164 // No extradata (codecpar or packet side data).
2165 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2166 return AVERROR(EINVAL);
2169 case AV_CODEC_ID_FLAC:
2170 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2171 AVCodecParameters *codecpriv_par;
2172 if (side_data_size != par->extradata_size) {
2173 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2175 return AVERROR(EINVAL);
2177 codecpriv_par = avcodec_parameters_alloc();
2179 return AVERROR(ENOMEM);
2180 ret = avcodec_parameters_copy(codecpriv_par, par);
2182 avcodec_parameters_free(&codecpriv_par);
2185 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2186 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2187 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2188 avcodec_parameters_free(&codecpriv_par);
2191 // FIXME: Remove the following once libaom starts propagating extradata during init()
2192 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2193 case AV_CODEC_ID_AV1:
2194 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2195 !par->extradata_size) {
2196 AVIOContext *dyn_cp;
2199 ret = avio_open_dyn_buf(&dyn_cp);
2202 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2203 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2204 if (!codecpriv_size) {
2206 return AVERROR_INVALIDDATA;
2208 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2209 // Do not write the OBUs as we don't have space saved for them
2210 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2212 ret = ff_alloc_extradata(par, side_data_size);
2215 memcpy(par->extradata, side_data, side_data_size);
2216 } else if (!par->extradata_size)
2217 return AVERROR_INVALIDDATA;
2221 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2228 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2230 MatroskaMuxContext *mkv = s->priv_data;
2232 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2233 mkv_track *track = &mkv->tracks[pkt->stream_index];
2234 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2235 int duration = pkt->duration;
2237 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2238 int64_t relative_packet_pos;
2240 if (ts == AV_NOPTS_VALUE) {
2241 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2242 return AVERROR(EINVAL);
2244 ts += track->ts_offset;
2246 if (mkv->cluster_pos != -1) {
2247 int64_t cluster_time = ts - mkv->cluster_pts;
2248 if ((int16_t)cluster_time != cluster_time) {
2250 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2254 if (mkv->cluster_pos == -1) {
2255 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2258 mkv->cluster_pos = avio_tell(s->pb);
2259 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2260 mkv->cluster_pts = FFMAX(0, ts);
2261 av_log(s, AV_LOG_DEBUG,
2262 "Starting new cluster with timestamp "
2263 "%" PRId64 " at offset %" PRId64 " bytes\n",
2264 mkv->cluster_pts, mkv->cluster_pos);
2266 pb = mkv->cluster_bc;
2268 relative_packet_pos = avio_tell(pb);
2270 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2271 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2274 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2275 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2276 mkv->cluster_pos, relative_packet_pos, -1);
2277 if (ret < 0) return ret;
2280 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2281 duration = mkv_write_vtt_blocks(s, pb, pkt);
2283 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2284 mkv_blockgroup_size(pkt->size,
2285 track->track_num_size));
2287 #if FF_API_CONVERGENCE_DURATION
2288 FF_DISABLE_DEPRECATION_WARNINGS
2289 /* For backward compatibility, prefer convergence_duration. */
2290 if (pkt->convergence_duration > 0) {
2291 duration = pkt->convergence_duration;
2293 FF_ENABLE_DEPRECATION_WARNINGS
2295 /* All subtitle blocks are considered to be keyframes. */
2296 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2297 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2298 end_ebml_master(pb, blockgroup);
2301 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2302 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2303 mkv->cluster_pos, relative_packet_pos, duration);
2309 mkv->duration = FFMAX(mkv->duration, ts + duration);
2310 track->duration = FFMAX(track->duration, ts + duration);
2315 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2317 MatroskaMuxContext *mkv = s->priv_data;
2318 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2319 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2321 int64_t cluster_time;
2323 int start_new_cluster;
2325 ret = mkv_check_new_extra_data(s, pkt);
2329 if (mkv->tracks[pkt->stream_index].write_dts)
2330 cluster_time = pkt->dts - mkv->cluster_pts;
2332 cluster_time = pkt->pts - mkv->cluster_pts;
2333 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2335 cluster_size = avio_tell(mkv->cluster_bc);
2337 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2338 // WebM DASH specification states that the first block of every cluster
2339 // has to be a key frame. So for DASH video, we only create a cluster
2340 // on seeing key frames.
2341 start_new_cluster = keyframe;
2342 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2343 (mkv->cluster_pos == -1 ||
2344 cluster_time > mkv->cluster_time_limit)) {
2345 // For DASH audio, we create a Cluster based on cluster_time_limit
2346 start_new_cluster = 1;
2347 } else if (!mkv->is_dash &&
2348 (cluster_size > mkv->cluster_size_limit ||
2349 cluster_time > mkv->cluster_time_limit ||
2350 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2351 cluster_size > 4 * 1024))) {
2352 start_new_cluster = 1;
2354 start_new_cluster = 0;
2357 if (mkv->cluster_pos != -1 && start_new_cluster) {
2361 if (!mkv->cluster_pos)
2362 avio_write_marker(s->pb,
2363 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2364 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2366 // check if we have an audio packet cached
2367 if (mkv->cur_audio_pkt.size > 0) {
2368 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2369 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2370 mkv->is_dash ? start_new_cluster : 0);
2371 av_packet_unref(&mkv->cur_audio_pkt);
2373 av_log(s, AV_LOG_ERROR,
2374 "Could not write cached audio packet ret:%d\n", ret);
2379 // buffer an audio packet to ensure the packet containing the video
2380 // keyframe's timecode is contained in the same cluster for WebM
2381 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2383 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2385 ret = mkv_write_packet_internal(s, pkt, 0);
2389 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2391 MatroskaMuxContext *mkv = s->priv_data;
2394 if (mkv->cluster_pos != -1) {
2396 av_log(s, AV_LOG_DEBUG,
2397 "Flushing cluster at offset %" PRIu64 " bytes\n",
2402 return mkv_write_packet(s, pkt);
2405 static int mkv_write_trailer(AVFormatContext *s)
2407 MatroskaMuxContext *mkv = s->priv_data;
2408 AVIOContext *pb = s->pb;
2411 // check if we have an audio packet cached
2412 if (mkv->cur_audio_pkt.size > 0) {
2413 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2415 av_log(s, AV_LOG_ERROR,
2416 "Could not write cached audio packet ret:%d\n", ret);
2421 if (mkv->cluster_bc) {
2422 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2423 MATROSKA_ID_CLUSTER, 0, 0);
2426 ret = mkv_write_chapters(s);
2431 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2432 int64_t endpos, ret64;
2434 endpos = avio_tell(pb);
2436 if (mkv->cues.num_entries) {
2437 AVIOContext *cues = NULL;
2439 int64_t cuespos = endpos;
2440 int length_size = 0;
2442 ret = start_ebml_master_crc32(&cues, mkv);
2446 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2447 mkv->tracks, s->nb_streams);
2449 ffio_free_dyn_buf(&cues);
2453 if (mkv->reserve_cues_space) {
2454 size = avio_tell(cues);
2455 length_size = ebml_length_size(size);
2456 size += 4 + length_size;
2457 if (mkv->reserve_cues_space < size) {
2458 av_log(s, AV_LOG_WARNING,
2459 "Insufficient space reserved for Cues: "
2460 "%d < %"PRIu64". No Cues will be output.\n",
2461 mkv->reserve_cues_space, size);
2462 mkv->reserve_cues_space = -1;
2463 ffio_free_dyn_buf(&cues);
2466 cuespos = mkv->cues_pos;
2467 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2468 ffio_free_dyn_buf(&cues);
2471 if (mkv->reserve_cues_space == size + 1) {
2472 /* There is no way to reserve a single byte because
2473 * the minimal size of an EBML Void element is 2
2474 * (1 byte ID, 1 byte length field). This problem
2475 * is solved by writing the Cues' length field on
2476 * one byte more than necessary. */
2482 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2483 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2485 if (mkv->reserve_cues_space) {
2486 if (size < mkv->reserve_cues_space)
2487 put_ebml_void(pb, mkv->reserve_cues_space - size);
2489 endpos = avio_tell(pb);
2493 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2497 // update the duration
2498 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2499 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2500 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2501 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2503 // write tracks master
2504 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2505 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2507 // update stream durations
2510 for (i = 0; i < s->nb_streams; ++i) {
2511 AVStream *st = s->streams[i];
2512 mkv_track *track = &mkv->tracks[i];
2514 if (track->duration_offset > 0) {
2515 double duration_sec = track->duration * av_q2d(st->time_base);
2516 char duration_string[20] = "";
2518 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2521 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2523 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2524 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2525 fmod(duration_sec, 60));
2527 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2531 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2532 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2535 avio_seek(pb, endpos, SEEK_SET);
2538 if (!mkv->is_live) {
2539 end_ebml_master(pb, mkv->segment);
2542 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2545 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2548 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2549 if (ff_mkv_codec_tags[i].id == codec_id)
2552 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2553 enum AVMediaType type = avcodec_get_type(codec_id);
2554 // mkv theoretically supports any video/audio through VFW/ACM
2555 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2562 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2565 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2566 if (ff_webm_codec_tags[i].id == codec_id)
2572 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2577 uid = (uint64_t)av_lfg_get(c) << 32;
2578 uid |= av_lfg_get(c);
2581 for (k = 0; k < i; k++) {
2582 if (tracks[k].uid == uid)
2590 static int mkv_init(struct AVFormatContext *s)
2592 MatroskaMuxContext *mkv = s->priv_data;
2594 unsigned nb_tracks = 0;
2597 for (i = 0; i < s->nb_streams; i++) {
2598 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2599 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2600 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2601 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2602 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2603 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2604 av_log(s, AV_LOG_ERROR,
2605 "The Matroska muxer does not yet support muxing %s\n",
2606 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2607 return AVERROR_PATCHWELCOME;
2611 if (s->avoid_negative_ts < 0) {
2612 s->avoid_negative_ts = 1;
2613 s->internal->avoid_negative_ts_use_pts = 1;
2616 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2618 return AVERROR(ENOMEM);
2621 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2622 av_lfg_init(&c, av_get_random_seed());
2624 // Calculate the SegmentUID now in order not to waste our random seed.
2625 for (i = 0; i < 4; i++)
2626 mkv->segment_uid[i] = av_lfg_get(&c);
2629 for (i = 0; i < s->nb_streams; i++) {
2630 AVStream *st = s->streams[i];
2631 mkv_track *track = &mkv->tracks[i];
2633 if (s->flags & AVFMT_FLAG_BITEXACT) {
2636 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2639 // ms precision is the de-facto standard timescale for mkv files
2640 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2642 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
2646 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2647 track->track_num_size = ebml_num_size(track->track_num);
2653 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2656 AVStream *st = s->streams[pkt->stream_index];
2658 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2659 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2660 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2661 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2662 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2668 static const AVCodecTag additional_audio_tags[] = {
2669 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2670 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2671 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2672 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2673 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2674 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2675 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2676 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2677 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2678 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2679 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2680 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2681 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2684 static const AVCodecTag additional_video_tags[] = {
2685 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2686 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2687 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2688 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2691 static const AVCodecTag additional_subtitle_tags[] = {
2692 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2693 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2694 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2695 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2698 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2699 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2700 static const AVOption options[] = {
2701 { "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 },
2702 { "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 },
2703 { "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 },
2704 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2705 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2706 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2707 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2708 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2712 #if CONFIG_MATROSKA_MUXER
2713 static const AVClass matroska_class = {
2714 .class_name = "matroska muxer",
2715 .item_name = av_default_item_name,
2717 .version = LIBAVUTIL_VERSION_INT,
2720 AVOutputFormat ff_matroska_muxer = {
2722 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2723 .mime_type = "video/x-matroska",
2724 .extensions = "mkv",
2725 .priv_data_size = sizeof(MatroskaMuxContext),
2726 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2727 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2728 .video_codec = CONFIG_LIBX264_ENCODER ?
2729 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2731 .deinit = mkv_deinit,
2732 .write_header = mkv_write_header,
2733 .write_packet = mkv_write_flush_packet,
2734 .write_trailer = mkv_write_trailer,
2735 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2736 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2737 .codec_tag = (const AVCodecTag* const []){
2738 ff_codec_bmp_tags, ff_codec_wav_tags,
2739 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2741 .subtitle_codec = AV_CODEC_ID_ASS,
2742 .query_codec = mkv_query_codec,
2743 .check_bitstream = mkv_check_bitstream,
2744 .priv_class = &matroska_class,
2748 #if CONFIG_WEBM_MUXER
2749 static const AVClass webm_class = {
2750 .class_name = "webm muxer",
2751 .item_name = av_default_item_name,
2753 .version = LIBAVUTIL_VERSION_INT,
2756 AVOutputFormat ff_webm_muxer = {
2758 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2759 .mime_type = "video/webm",
2760 .extensions = "webm",
2761 .priv_data_size = sizeof(MatroskaMuxContext),
2762 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2763 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2764 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2766 .deinit = mkv_deinit,
2767 .write_header = mkv_write_header,
2768 .write_packet = mkv_write_flush_packet,
2769 .write_trailer = mkv_write_trailer,
2770 .query_codec = webm_query_codec,
2771 .check_bitstream = mkv_check_bitstream,
2772 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2773 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2774 .priv_class = &webm_class,
2778 #if CONFIG_MATROSKA_AUDIO_MUXER
2779 static const AVClass mka_class = {
2780 .class_name = "matroska audio muxer",
2781 .item_name = av_default_item_name,
2783 .version = LIBAVUTIL_VERSION_INT,
2785 AVOutputFormat ff_matroska_audio_muxer = {
2787 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2788 .mime_type = "audio/x-matroska",
2789 .extensions = "mka",
2790 .priv_data_size = sizeof(MatroskaMuxContext),
2791 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2792 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2793 .video_codec = AV_CODEC_ID_NONE,
2795 .deinit = mkv_deinit,
2796 .write_header = mkv_write_header,
2797 .write_packet = mkv_write_flush_packet,
2798 .write_trailer = mkv_write_trailer,
2799 .check_bitstream = mkv_check_bitstream,
2800 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2802 .codec_tag = (const AVCodecTag* const []){
2803 ff_codec_wav_tags, additional_audio_tags, 0
2805 .priv_class = &mka_class,