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
63 DEFAULT_MODE_INFER_NO_SUBS,
64 DEFAULT_MODE_PASSTHROUGH,
67 typedef struct ebml_master {
68 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
69 int sizebytes; ///< how many bytes were reserved for the size
72 typedef struct ebml_stored_master {
77 typedef struct mkv_seekhead_entry {
82 typedef struct mkv_seekhead {
84 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
89 typedef struct mkv_cuepoint {
92 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
93 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
94 int64_t duration; ///< duration of the block according to time base
97 typedef struct mkv_cues {
98 mkv_cuepoint *entries;
102 typedef struct mkv_track {
109 int64_t sample_rate_offset;
110 int64_t last_timestamp;
112 int64_t duration_offset;
113 int64_t codecpriv_offset;
117 #define MODE_MATROSKAv2 0x01
118 #define MODE_WEBM 0x02
120 typedef struct MatroskaMuxContext {
121 const AVClass *class;
123 ebml_stored_master info;
124 ebml_stored_master track;
125 ebml_stored_master tags;
127 int64_t segment_offset;
128 AVIOContext *cluster_bc;
129 int64_t cluster_pos; ///< file offset of the current cluster
131 int64_t duration_offset;
133 mkv_seekhead seekhead;
137 AVPacket cur_audio_pkt;
139 unsigned nb_attachments;
142 int reserve_cues_space;
143 int cluster_size_limit;
145 int64_t cluster_time_limit;
147 int dash_track_number;
151 uint32_t chapter_id_offset;
157 uint32_t segment_uid[4];
158 } MatroskaMuxContext;
160 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
161 * 8 byte for "matroska" doctype string */
162 #define MAX_EBML_HEADER_SIZE 35
164 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
165 * offset, 4 bytes for target EBML ID */
166 #define MAX_SEEKENTRY_SIZE 21
168 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
169 #define MAX_CUETRACKPOS_SIZE 40
171 /** Seek preroll value for opus */
172 #define OPUS_SEEK_PREROLL 80000000
174 static int ebml_id_size(uint32_t id)
176 return (av_log2(id) + 7U) / 8;
179 static void put_ebml_id(AVIOContext *pb, uint32_t id)
181 int i = ebml_id_size(id);
183 avio_w8(pb, (uint8_t)(id >> (i * 8)));
187 * Write an EBML size meaning "unknown size".
189 * @param bytes The number of bytes the size should occupy (maximum: 8).
191 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
193 av_assert0(bytes <= 8);
194 avio_w8(pb, 0x1ff >> bytes);
195 ffio_fill(pb, 0xff, bytes - 1);
199 * Returns how many bytes are needed to represent a number
200 * as EBML variable length integer.
202 static int ebml_num_size(uint64_t num)
212 * Calculate how many bytes are needed to represent the length field
213 * of an EBML element whose payload has a given length.
215 static int ebml_length_size(uint64_t length)
217 return ebml_num_size(length + 1);
221 * Write a number as EBML variable length integer on `bytes` bytes.
222 * `bytes` is taken literally without checking.
224 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
226 num |= 1ULL << bytes * 7;
227 for (int i = bytes - 1; i >= 0; i--)
228 avio_w8(pb, (uint8_t)(num >> i * 8));
232 * Write a length as EBML variable length integer.
234 * @param bytes The number of bytes that need to be used to write the number.
235 * If zero, the minimal number of bytes will be used.
237 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
239 int needed_bytes = ebml_length_size(length);
241 // sizes larger than this are currently undefined in EBML
242 av_assert0(length < (1ULL << 56) - 1);
245 bytes = needed_bytes;
246 // The bytes needed to write the given size must not exceed
247 // the bytes that we ought to use.
248 av_assert0(bytes >= needed_bytes);
249 put_ebml_num(pb, length, bytes);
253 * Write a (random) UID with fixed size to make the output more deterministic
255 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
257 put_ebml_id(pb, elementid);
258 put_ebml_length(pb, 8, 0);
262 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
269 put_ebml_id(pb, elementid);
270 put_ebml_length(pb, bytes, 0);
271 for (i = bytes - 1; i >= 0; i--)
272 avio_w8(pb, (uint8_t)(val >> i * 8));
275 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
278 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
283 put_ebml_id(pb, elementid);
284 put_ebml_length(pb, bytes, 0);
285 for (i = bytes - 1; i >= 0; i--)
286 avio_w8(pb, (uint8_t)(val >> i * 8));
289 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
291 put_ebml_id(pb, elementid);
292 put_ebml_length(pb, 8, 0);
293 avio_wb64(pb, av_double2int(val));
296 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
297 const void *buf, int size)
299 put_ebml_id(pb, elementid);
300 put_ebml_length(pb, size, 0);
301 avio_write(pb, buf, size);
304 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
307 put_ebml_binary(pb, elementid, str, strlen(str));
311 * Write a void element of a given size. Useful for reserving space in
312 * the file to be written to later.
314 * @param size The number of bytes to reserve, which must be at least 2.
316 static void put_ebml_void(AVIOContext *pb, int size)
318 av_assert0(size >= 2);
320 put_ebml_id(pb, EBML_ID_VOID);
321 // we need to subtract the length needed to store the size from the
322 // size we need to reserve so 2 cases, we use 8 bytes to store the
323 // size if possible, 1 byte otherwise
326 put_ebml_length(pb, size, 0);
329 put_ebml_length(pb, size, 8);
331 ffio_fill(pb, 0, size);
334 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
335 uint64_t expectedsize)
337 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
339 put_ebml_id(pb, elementid);
340 put_ebml_size_unknown(pb, bytes);
341 return (ebml_master) { avio_tell(pb), bytes };
344 static void end_ebml_master(AVIOContext *pb, ebml_master master)
346 int64_t pos = avio_tell(pb);
348 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
350 put_ebml_length(pb, pos - master.pos, master.sizebytes);
351 avio_seek(pb, pos, SEEK_SET);
354 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
357 mkv_seekhead *seekhead = &mkv->seekhead;
359 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
361 seekhead->entries[seekhead->num_entries].elementid = elementid;
362 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
365 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
369 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
373 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
378 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
379 MatroskaMuxContext *mkv, uint32_t id,
380 int length_size, int keep_buffer,
383 uint8_t *buf, crc[4];
387 mkv_add_seekhead_entry(mkv, id, avio_tell(pb));
390 size = avio_get_dyn_buf(*dyn_cp, &buf);
391 put_ebml_length(pb, size, length_size);
392 if (mkv->write_crc) {
393 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
394 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
395 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
397 avio_write(pb, buf + skip, size - skip);
400 ffio_reset_dyn_buf(*dyn_cp);
402 ffio_free_dyn_buf(dyn_cp);
407 * Output EBML master. Keep the buffer if seekable, allowing for later updates.
408 * Furthermore always add a SeekHead Entry for this element.
410 static void end_ebml_master_crc32_tentatively(AVIOContext *pb,
411 ebml_stored_master *elem,
412 MatroskaMuxContext *mkv, uint32_t id)
414 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
416 int size = avio_get_dyn_buf(elem->bc, &buf);
418 elem->pos = avio_tell(pb);
419 mkv_add_seekhead_entry(mkv, id, elem->pos);
422 put_ebml_length(pb, size, 0);
423 avio_write(pb, buf, size);
425 end_ebml_master_crc32(pb, &elem->bc, mkv, id, 0, 0, 1);
428 static void put_xiph_size(AVIOContext *pb, int size)
430 ffio_fill(pb, 255, size / 255);
431 avio_w8(pb, size % 255);
435 * Free the members allocated in the mux context.
437 static void mkv_deinit(AVFormatContext *s)
439 MatroskaMuxContext *mkv = s->priv_data;
441 av_packet_unref(&mkv->cur_audio_pkt);
443 ffio_free_dyn_buf(&mkv->cluster_bc);
444 ffio_free_dyn_buf(&mkv->info.bc);
445 ffio_free_dyn_buf(&mkv->track.bc);
446 ffio_free_dyn_buf(&mkv->tags.bc);
448 av_freep(&mkv->cues.entries);
449 av_freep(&mkv->tracks);
453 * Initialize the SeekHead element to be ready to index level 1 Matroska
454 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
455 * will be reserved at the current file location.
457 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
459 mkv->seekhead.filepos = avio_tell(pb);
460 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
461 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
462 // that an EBML void element will fit afterwards
463 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
464 put_ebml_void(pb, mkv->seekhead.reserved_size);
468 * Write the SeekHead to the file at the location reserved for it
469 * and seek to destpos afterwards. When error_on_seek_failure
470 * is not set, failure to seek to the position designated for the
471 * SeekHead is not considered an error and it is presumed that
472 * destpos is the current position; failure to seek to destpos
473 * afterwards is always an error.
475 * @return 0 on success, < 0 on error.
477 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
478 int error_on_seek_failure, int64_t destpos)
480 AVIOContext *dyn_cp = NULL;
481 mkv_seekhead *seekhead = &mkv->seekhead;
482 int64_t remaining, ret64;
485 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
486 return error_on_seek_failure ? ret64 : 0;
488 ret = start_ebml_master_crc32(&dyn_cp, mkv);
492 for (i = 0; i < seekhead->num_entries; i++) {
493 mkv_seekhead_entry *entry = &seekhead->entries[i];
494 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
497 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
498 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
499 put_ebml_id(dyn_cp, entry->elementid);
501 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
502 end_ebml_master(dyn_cp, seekentry);
504 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0, 0);
506 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
507 put_ebml_void(pb, remaining);
509 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
515 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
516 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
518 mkv_cues *cues = &mkv->cues;
519 mkv_cuepoint *entries = cues->entries;
524 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
526 return AVERROR(ENOMEM);
527 cues->entries = entries;
529 cues->entries[cues->num_entries].pts = ts;
530 cues->entries[cues->num_entries].stream_idx = stream;
531 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
532 cues->entries[cues->num_entries].relative_pos = relative_pos;
533 cues->entries[cues->num_entries++].duration = duration;
538 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
539 mkv_cues *cues, mkv_track *tracks, int num_tracks)
541 AVIOContext *cuepoint;
544 ret = avio_open_dyn_buf(&cuepoint);
548 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
550 uint64_t pts = entry->pts;
554 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
556 // put all the entries from different tracks that have the exact same
557 // timestamp into the same CuePoint
558 for (int j = 0; j < num_tracks; j++)
559 tracks[j].has_cue = 0;
561 ebml_master track_positions;
562 int idx = entry->stream_idx;
564 av_assert0(idx >= 0 && idx < num_tracks);
565 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
567 tracks[idx].has_cue = 1;
568 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
569 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
570 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
571 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
572 if (entry->duration != -1)
573 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
574 end_ebml_master(cuepoint, track_positions);
575 } while (++entry < end && entry->pts == pts);
576 size = avio_get_dyn_buf(cuepoint, &buf);
577 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
578 ffio_reset_dyn_buf(cuepoint);
580 ffio_free_dyn_buf(&cuepoint);
585 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb,
586 const AVCodecParameters *par)
588 const uint8_t *header_start[3];
590 int first_header_size;
593 if (par->codec_id == AV_CODEC_ID_VORBIS)
594 first_header_size = 30;
596 first_header_size = 42;
598 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
599 first_header_size, header_start, header_len) < 0) {
600 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
604 avio_w8(pb, 2); // number packets - 1
605 for (j = 0; j < 2; j++) {
606 put_xiph_size(pb, header_len[j]);
608 for (j = 0; j < 3; j++)
609 avio_write(pb, header_start[j], header_len[j]);
614 static int put_wv_codecpriv(AVIOContext *pb, const AVCodecParameters *par)
616 if (par->extradata && par->extradata_size == 2)
617 avio_write(pb, par->extradata, 2);
619 avio_wl16(pb, 0x410); // fallback to the most recent version
623 static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb,
624 const AVCodecParameters *par)
626 int write_comment = (par->channel_layout &&
627 !(par->channel_layout & ~0x3ffffULL) &&
628 !ff_flac_is_native_layout(par->channel_layout));
629 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
636 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
637 "Lavf" : LIBAVFORMAT_IDENT;
638 AVDictionary *dict = NULL;
642 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
643 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
645 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
646 av_assert1(len < (1 << 24) - 4);
651 ff_vorbiscomment_write(pb, dict, vendor, NULL, 0);
659 static int get_aac_sample_rates(AVFormatContext *s, const uint8_t *extradata,
660 int extradata_size, int *sample_rate,
661 int *output_sample_rate)
663 MPEG4AudioConfig mp4ac;
666 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
667 /* Don't abort if the failure is because of missing extradata. Assume in that
668 * case a bitstream filter will provide the muxer with the extradata in the
670 * Abort however if s->pb is not seekable, as we would not be able to seek back
671 * to write the sample rate elements once the extradata shows up, anyway. */
672 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
673 av_log(s, AV_LOG_ERROR,
674 "Error parsing AAC extradata, unable to determine samplerate.\n");
675 return AVERROR(EINVAL);
679 /* This will only happen when this function is called while writing the
680 * header and no extradata is available. The space for this element has
681 * to be reserved for when this function is called again after the
682 * extradata shows up in the first packet, as there's no way to know if
683 * output_sample_rate will be different than sample_rate or not. */
684 *output_sample_rate = *sample_rate;
686 *sample_rate = mp4ac.sample_rate;
687 *output_sample_rate = mp4ac.ext_sample_rate;
692 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
693 const AVCodecParameters *par,
696 switch (par->codec_id) {
697 case AV_CODEC_ID_VORBIS:
698 case AV_CODEC_ID_THEORA:
699 return put_xiph_codecpriv(s, dyn_cp, par);
700 case AV_CODEC_ID_FLAC:
701 return put_flac_codecpriv(s, dyn_cp, par);
702 case AV_CODEC_ID_WAVPACK:
703 return put_wv_codecpriv(dyn_cp, par);
704 case AV_CODEC_ID_H264:
705 return ff_isom_write_avcc(dyn_cp, par->extradata,
706 par->extradata_size);
707 case AV_CODEC_ID_HEVC:
708 return ff_isom_write_hvcc(dyn_cp, par->extradata,
709 par->extradata_size, 0);
710 case AV_CODEC_ID_AV1:
711 if (par->extradata_size)
712 return ff_isom_write_av1c(dyn_cp, par->extradata,
713 par->extradata_size);
715 put_ebml_void(pb, 4 + 3);
717 case AV_CODEC_ID_ALAC:
718 if (par->extradata_size < 36) {
719 av_log(s, AV_LOG_ERROR,
720 "Invalid extradata found, ALAC expects a 36-byte "
722 return AVERROR_INVALIDDATA;
724 avio_write(dyn_cp, par->extradata + 12,
725 par->extradata_size - 12);
727 case AV_CODEC_ID_AAC:
728 if (par->extradata_size)
729 avio_write(dyn_cp, par->extradata, par->extradata_size);
731 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
734 if (par->codec_id == AV_CODEC_ID_PRORES &&
735 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
736 avio_wl32(dyn_cp, par->codec_tag);
737 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
738 avio_write(dyn_cp, par->extradata, par->extradata_size);
744 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
745 AVCodecParameters *par,
746 int native_id, int qt_id)
750 int ret, codecpriv_size;
752 ret = avio_open_dyn_buf(&dyn_cp);
757 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
758 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
761 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
763 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
764 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
767 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
768 avio_wl32(dyn_cp, par->codec_tag);
769 for(i = 0; i < 0x5a - 8; i++)
772 avio_write(dyn_cp, par->extradata, par->extradata_size);
774 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
775 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
776 avcodec_get_name(par->codec_id));
779 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
781 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
782 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
783 avcodec_get_name(par->codec_id));
784 ret = AVERROR(EINVAL);
787 ff_put_bmp_header(dyn_cp, par, 0, 0);
789 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
791 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
793 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
794 avcodec_get_name(par->codec_id));
795 ret = AVERROR(EINVAL);
798 par->codec_tag = tag;
800 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
803 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
805 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
807 ffio_free_dyn_buf(&dyn_cp);
811 static int mkv_write_video_color(AVIOContext *pb, const AVCodecParameters *par,
815 uint8_t *colorinfo_ptr;
816 int side_data_size = 0;
817 int ret, colorinfo_size;
818 const uint8_t *side_data;
820 ret = avio_open_dyn_buf(&dyn_cp);
824 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
825 par->color_trc < AVCOL_TRC_NB) {
826 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
829 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
830 par->color_space < AVCOL_SPC_NB) {
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
833 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
834 par->color_primaries < AVCOL_PRI_NB) {
835 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
837 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
838 par->color_range < AVCOL_RANGE_NB) {
839 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
841 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
842 par->chroma_location <= AVCHROMA_LOC_TOP) {
845 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
846 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
847 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
850 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
852 if (side_data_size) {
853 const AVContentLightMetadata *metadata =
854 (const AVContentLightMetadata*)side_data;
855 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
856 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
859 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
861 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
862 ebml_master meta_element = start_ebml_master(
863 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
864 const AVMasteringDisplayMetadata *metadata =
865 (const AVMasteringDisplayMetadata*)side_data;
866 if (metadata->has_primaries) {
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
868 av_q2d(metadata->display_primaries[0][0]));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
870 av_q2d(metadata->display_primaries[0][1]));
871 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
872 av_q2d(metadata->display_primaries[1][0]));
873 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
874 av_q2d(metadata->display_primaries[1][1]));
875 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
876 av_q2d(metadata->display_primaries[2][0]));
877 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
878 av_q2d(metadata->display_primaries[2][1]));
879 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
880 av_q2d(metadata->white_point[0]));
881 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
882 av_q2d(metadata->white_point[1]));
884 if (metadata->has_luminance) {
885 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
886 av_q2d(metadata->max_luminance));
887 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
888 av_q2d(metadata->min_luminance));
890 end_ebml_master(dyn_cp, meta_element);
893 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
894 if (colorinfo_size) {
895 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
896 avio_write(pb, colorinfo_ptr, colorinfo_size);
897 end_ebml_master(pb, colorinfo);
899 ffio_free_dyn_buf(&dyn_cp);
903 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
906 ebml_master projection;
907 int side_data_size = 0;
910 const AVSphericalMapping *spherical =
911 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
917 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
918 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
919 spherical->projection != AV_SPHERICAL_CUBEMAP) {
920 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
924 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
925 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
926 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
927 4 * (2 + 1 + 8) + (2 + 1 + 20));
929 switch (spherical->projection) {
930 case AV_SPHERICAL_EQUIRECTANGULAR:
931 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
932 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
934 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
935 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
936 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
937 AV_WB32(private, 0); // version + flags
938 AV_WB32(private + 4, spherical->bound_top);
939 AV_WB32(private + 8, spherical->bound_bottom);
940 AV_WB32(private + 12, spherical->bound_left);
941 AV_WB32(private + 16, spherical->bound_right);
942 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
945 case AV_SPHERICAL_CUBEMAP:
946 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
947 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
948 AV_WB32(private, 0); // version + flags
949 AV_WB32(private + 4, 0); // layout
950 AV_WB32(private + 8, spherical->padding);
951 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
959 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
960 (double) spherical->yaw / (1 << 16));
961 if (spherical->pitch)
962 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
963 (double) spherical->pitch / (1 << 16));
965 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
966 (double) spherical->roll / (1 << 16));
968 end_ebml_master(pb, projection);
973 static void mkv_write_field_order(AVIOContext *pb, int mode,
974 enum AVFieldOrder field_order)
976 switch (field_order) {
977 case AV_FIELD_UNKNOWN:
979 case AV_FIELD_PROGRESSIVE:
980 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
981 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
987 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
988 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
989 if (mode != MODE_WEBM) {
990 switch (field_order) {
992 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
993 MATROSKA_VIDEO_FIELDORDER_TT);
996 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
997 MATROSKA_VIDEO_FIELDORDER_BB);
1000 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1001 MATROSKA_VIDEO_FIELDORDER_TB);
1004 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1005 MATROSKA_VIDEO_FIELDORDER_BT);
1012 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1013 AVStream *st, int mode, int *h_width, int *h_height)
1017 const AVDictionaryEntry *tag;
1018 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1022 // convert metadata into proper side data and add it to the stream
1023 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1024 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1025 int stereo_mode = atoi(tag->value);
1027 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1028 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1033 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1034 stereo_mode != 10 && stereo_mode != 12) {
1035 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1041 // iterate to find the stereo3d side data
1042 for (i = 0; i < st->nb_side_data; i++) {
1043 AVPacketSideData sd = st->side_data[i];
1044 if (sd.type == AV_PKT_DATA_STEREO3D) {
1045 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1047 switch (stereo->type) {
1048 case AV_STEREO3D_2D:
1049 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1051 case AV_STEREO3D_SIDEBYSIDE:
1052 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1053 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1054 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1057 case AV_STEREO3D_TOPBOTTOM:
1058 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1059 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1063 case AV_STEREO3D_CHECKERBOARD:
1064 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1065 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1068 case AV_STEREO3D_LINES:
1069 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1070 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1074 case AV_STEREO3D_COLUMNS:
1075 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1076 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1080 case AV_STEREO3D_FRAMESEQUENCE:
1081 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1082 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1090 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1093 // if webm, do not write unsupported modes
1094 if ((mode == MODE_WEBM &&
1095 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1096 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1097 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1098 av_log(s, AV_LOG_ERROR,
1099 "The specified stereo mode is not valid.\n");
1100 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1101 return AVERROR(EINVAL);
1104 // write StereoMode if format is valid
1105 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1110 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1111 AVStream *st, mkv_track *track, AVIOContext *pb,
1114 AVCodecParameters *par = st->codecpar;
1115 ebml_master subinfo, track_master;
1119 int sample_rate = par->sample_rate;
1120 int output_sample_rate = 0;
1121 int display_width_div = 1;
1122 int display_height_div = 1;
1124 const AVDictionaryEntry *tag;
1126 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1129 if (par->codec_id == AV_CODEC_ID_AAC) {
1130 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1131 &output_sample_rate);
1136 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1137 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1138 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1139 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGLACING, 0); // no lacing (yet)
1141 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1142 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1143 tag = av_dict_get(st->metadata, "language", NULL, 0);
1144 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1145 tag && tag->value ? tag->value : "und");
1147 // The default value for TRACKFLAGDEFAULT is 1, so add element
1148 // if we need to clear it.
1150 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, 0);
1152 if (st->disposition & AV_DISPOSITION_FORCED)
1153 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1155 if (mkv->mode == MODE_WEBM) {
1156 const char *codec_id;
1157 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1158 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1159 if (ff_webm_codec_tags[j].id == par->codec_id) {
1160 codec_id = ff_webm_codec_tags[j].str;
1165 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1166 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1167 codec_id = "D_WEBVTT/CAPTIONS";
1168 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1169 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1170 codec_id = "D_WEBVTT/DESCRIPTIONS";
1171 native_id = MATROSKA_TRACK_TYPE_METADATA;
1172 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1173 codec_id = "D_WEBVTT/METADATA";
1174 native_id = MATROSKA_TRACK_TYPE_METADATA;
1176 codec_id = "D_WEBVTT/SUBTITLES";
1177 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1182 av_log(s, AV_LOG_ERROR,
1183 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1184 return AVERROR(EINVAL);
1187 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1189 // look for a codec ID string specific to mkv to use,
1190 // if none are found, use AVI codes
1191 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1192 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1193 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1194 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1200 if (mkv->allow_raw_vfw) {
1203 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1204 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1205 return AVERROR(EINVAL);
1210 switch (par->codec_type) {
1211 case AVMEDIA_TYPE_VIDEO:
1212 mkv->have_video = 1;
1213 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1215 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1216 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1217 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1218 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1219 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1220 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1223 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1224 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1225 par->codec_id == AV_CODEC_ID_SVQ1 ||
1226 par->codec_id == AV_CODEC_ID_SVQ3 ||
1227 par->codec_id == AV_CODEC_ID_CINEPAK))
1231 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1232 else if (!native_id) {
1233 // if there is no mkv-specific codec ID, use VFW mode
1234 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1235 track->write_dts = 1;
1236 s->internal->avoid_negative_ts_use_pts = 0;
1239 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1241 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1242 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1244 mkv_write_field_order(pb, mkv->mode, par->field_order);
1246 // check both side data and metadata for stereo information,
1247 // write the result to the bitstream if any is found
1248 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1250 &display_height_div);
1254 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1255 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1256 (par->format == AV_PIX_FMT_YUVA420P)) {
1257 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1260 // write DisplayWidth and DisplayHeight, they contain the size of
1261 // a single source view and/or the display aspect ratio
1262 if (st->sample_aspect_ratio.num) {
1263 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1264 if (d_width > INT_MAX) {
1265 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1266 return AVERROR(EINVAL);
1268 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1269 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1270 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1271 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1273 AVRational display_aspect_ratio;
1274 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1275 par->width * (int64_t)st->sample_aspect_ratio.num,
1276 par->height * (int64_t)st->sample_aspect_ratio.den,
1278 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1279 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1280 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1283 } else if (display_width_div != 1 || display_height_div != 1) {
1284 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1285 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1286 } else if (mkv->mode != MODE_WEBM)
1287 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1289 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1290 uint32_t color_space = av_le2ne32(par->codec_tag);
1291 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1293 ret = mkv_write_video_color(pb, par, st);
1296 ret = mkv_write_video_projection(s, pb, st);
1299 end_ebml_master(pb, subinfo);
1302 case AVMEDIA_TYPE_AUDIO:
1303 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1304 int64_t codecdelay = av_rescale_q(par->initial_padding,
1305 (AVRational){ 1, 48000 },
1306 (AVRational){ 1, 1000000000 });
1307 if (codecdelay < 0) {
1308 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1309 return AVERROR(EINVAL);
1311 // track->ts_offset = av_rescale_q(par->initial_padding,
1312 // (AVRational){ 1, par->sample_rate },
1315 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1317 if (par->codec_id == AV_CODEC_ID_OPUS)
1318 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1320 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1323 // no mkv-specific ID, use ACM mode
1324 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1326 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 6 + 4 * 9);
1327 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1329 track->sample_rate_offset = avio_tell(pb);
1330 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1331 if (output_sample_rate)
1332 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1334 bit_depth = av_get_bits_per_sample(par->codec_id);
1335 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1336 if (par->bits_per_raw_sample)
1337 bit_depth = par->bits_per_raw_sample;
1339 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1342 bit_depth = par->bits_per_coded_sample;
1344 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1345 end_ebml_master(pb, subinfo);
1348 case AVMEDIA_TYPE_SUBTITLE:
1350 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1351 return AVERROR(ENOSYS);
1354 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1355 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1357 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1360 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1361 return AVERROR(EINVAL);
1364 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1365 track->codecpriv_offset = avio_tell(pb);
1366 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1371 end_ebml_master(pb, track_master);
1376 static int mkv_write_tracks(AVFormatContext *s)
1378 MatroskaMuxContext *mkv = s->priv_data;
1379 AVIOContext *pb = s->pb;
1380 int i, ret, video_default_idx, audio_default_idx, subtitle_default_idx;
1382 if (mkv->nb_attachments == s->nb_streams)
1385 ret = start_ebml_master_crc32(&mkv->track.bc, mkv);
1389 if (mkv->default_mode != DEFAULT_MODE_PASSTHROUGH) {
1390 int video_idx, audio_idx, subtitle_idx;
1392 video_idx = video_default_idx =
1393 audio_idx = audio_default_idx =
1394 subtitle_idx = subtitle_default_idx = -1;
1396 for (i = s->nb_streams - 1; i >= 0; i--) {
1397 AVStream *st = s->streams[i];
1399 switch (st->codecpar->codec_type) {
1400 #define CASE(type, variable) \
1401 case AVMEDIA_TYPE_ ## type: \
1402 variable ## _idx = i; \
1403 if (st->disposition & AV_DISPOSITION_DEFAULT) \
1404 variable ## _default_idx = i; \
1408 CASE(SUBTITLE, subtitle)
1413 video_default_idx = FFMAX(video_default_idx, video_idx);
1414 audio_default_idx = FFMAX(audio_default_idx, audio_idx);
1415 if (mkv->default_mode != DEFAULT_MODE_INFER_NO_SUBS)
1416 subtitle_default_idx = FFMAX(subtitle_default_idx, subtitle_idx);
1418 for (i = 0; i < s->nb_streams; i++) {
1419 AVStream *st = s->streams[i];
1420 int is_default = mkv->default_mode == DEFAULT_MODE_PASSTHROUGH ?
1421 st->disposition & AV_DISPOSITION_DEFAULT :
1422 i == video_default_idx || i == audio_default_idx ||
1423 i == subtitle_default_idx;
1424 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1425 mkv->track.bc, is_default);
1430 end_ebml_master_crc32_tentatively(pb, &mkv->track, mkv,
1431 MATROSKA_ID_TRACKS);
1436 static int mkv_write_chapters(AVFormatContext *s)
1438 MatroskaMuxContext *mkv = s->priv_data;
1439 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1440 ebml_master editionentry;
1441 AVRational scale = {1, 1E9};
1444 if (!s->nb_chapters || mkv->wrote_chapters)
1447 for (i = 0; i < s->nb_chapters; i++)
1448 if (!s->chapters[i]->id) {
1449 mkv->chapter_id_offset = 1;
1453 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1457 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1458 if (mkv->mode != MODE_WEBM)
1459 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1461 for (i = 0; i < s->nb_chapters; i++) {
1462 ebml_master chapteratom, chapterdisplay;
1463 const AVChapter *c = s->chapters[i];
1464 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1465 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1466 const AVDictionaryEntry *t;
1467 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1468 av_log(s, AV_LOG_ERROR,
1469 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1470 chapterstart, chapterend);
1471 ffio_free_dyn_buf(&dyn_cp);
1472 return AVERROR_INVALIDDATA;
1475 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1476 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1477 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1478 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1479 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1480 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1481 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1482 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1483 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1484 end_ebml_master(dyn_cp, chapterdisplay);
1486 end_ebml_master(dyn_cp, chapteratom);
1488 end_ebml_master(dyn_cp, editionentry);
1489 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0, 1);
1491 mkv->wrote_chapters = 1;
1495 static int mkv_write_simpletag(AVIOContext *pb, const AVDictionaryEntry *t)
1497 uint8_t *key = av_strdup(t->key);
1499 const uint8_t *lang = NULL;
1503 return AVERROR(ENOMEM);
1505 if ((p = strrchr(p, '-')) &&
1506 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1513 else if (*p >= 'a' && *p <= 'z')
1518 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1519 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1521 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1522 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1523 end_ebml_master(pb, tag);
1529 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1530 uint64_t uid, ebml_master *tag)
1533 MatroskaMuxContext *mkv = s->priv_data;
1534 ebml_master targets;
1537 if (!mkv->tags.bc) {
1538 ret = start_ebml_master_crc32(&mkv->tags.bc, mkv);
1544 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1545 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1547 put_ebml_uid(pb, elementid, uid);
1548 end_ebml_master(pb, targets);
1552 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1554 return av_strcasecmp(name, "title") &&
1555 av_strcasecmp(name, "stereo_mode") &&
1556 av_strcasecmp(name, "creation_time") &&
1557 av_strcasecmp(name, "encoding_tool") &&
1558 av_strcasecmp(name, "duration") &&
1559 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1560 av_strcasecmp(name, "language")) &&
1561 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1562 (av_strcasecmp(name, "filename") &&
1563 av_strcasecmp(name, "mimetype")));
1566 static int mkv_write_tag(AVFormatContext *s, const AVDictionary *m,
1567 uint32_t elementid, uint64_t uid, ebml_master *tag)
1569 MatroskaMuxContext *mkv = s->priv_data;
1570 const AVDictionaryEntry *t = NULL;
1574 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1578 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1579 if (mkv_check_tag_name(t->key, elementid)) {
1580 ret = mkv_write_simpletag(mkv->tags.bc, t);
1587 end_ebml_master(mkv->tags.bc, tag2);
1592 static int mkv_check_tag(const AVDictionary *m, uint32_t elementid)
1594 const AVDictionaryEntry *t = NULL;
1596 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1597 if (mkv_check_tag_name(t->key, elementid))
1603 static int mkv_write_tags(AVFormatContext *s)
1605 MatroskaMuxContext *mkv = s->priv_data;
1606 ebml_master tag, *tagp;
1609 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1611 if (mkv_check_tag(s->metadata, 0)) {
1612 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1617 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1618 for (i = 0; i < s->nb_streams; i++) {
1619 const AVStream *st = s->streams[i];
1620 mkv_track *track = &mkv->tracks[i];
1622 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1625 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1628 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1634 AVIOContext *pb = mkv->tags.bc;
1635 ebml_master simpletag;
1637 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1639 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1640 track->duration_offset = avio_tell(pb);
1642 // Reserve space to write duration as a 20-byte string.
1643 // 2 (ebml id) + 1 (data size) + 20 (data)
1644 put_ebml_void(pb, 23);
1645 end_ebml_master(pb, simpletag);
1646 end_ebml_master(pb, tag);
1650 if (mkv->mode != MODE_WEBM) {
1651 for (i = 0; i < s->nb_chapters; i++) {
1652 AVChapter *ch = s->chapters[i];
1654 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1657 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1658 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1665 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1666 for (i = 0; i < s->nb_streams; i++) {
1667 const mkv_track *track = &mkv->tracks[i];
1668 const AVStream *st = s->streams[i];
1670 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1673 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1676 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1684 end_ebml_master_crc32_tentatively(s->pb, &mkv->tags, mkv,
1690 static const char *get_mimetype(const AVStream *st)
1692 const AVDictionaryEntry *t;
1694 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1696 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
1697 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1698 if (desc && desc->mime_types) {
1699 return desc->mime_types[0];
1700 } else if (st->codecpar->codec_id == AV_CODEC_ID_TEXT)
1701 return "text/plain";
1707 static int mkv_write_attachments(AVFormatContext *s)
1709 MatroskaMuxContext *mkv = s->priv_data;
1710 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1713 if (!mkv->nb_attachments)
1716 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1720 for (i = 0; i < s->nb_streams; i++) {
1721 const AVStream *st = s->streams[i];
1722 mkv_track *track = &mkv->tracks[i];
1723 ebml_master attached_file;
1724 const AVDictionaryEntry *t;
1725 const char *mimetype;
1727 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1730 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1732 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1733 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1734 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1735 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1736 return AVERROR(EINVAL);
1738 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1740 mimetype = get_mimetype(st);
1741 av_assert0(mimetype);
1742 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1743 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1744 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1745 end_ebml_master(dyn_cp, attached_file);
1747 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0, 1);
1752 static int64_t get_metadata_duration(AVFormatContext *s)
1754 const AVDictionaryEntry *duration = av_dict_get(s->metadata, "DURATION",
1759 if (duration && (av_parse_time(&us, duration->value, 1) == 0) && us > 0) {
1760 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1764 for (unsigned i = 0; i < s->nb_streams; i++) {
1766 duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1768 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1769 max = FFMAX(max, us);
1772 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1776 static int mkv_write_header(AVFormatContext *s)
1778 MatroskaMuxContext *mkv = s->priv_data;
1779 AVIOContext *pb = s->pb;
1780 ebml_master ebml_header;
1781 const AVDictionaryEntry *tag;
1782 int ret, i, version = 2;
1783 int64_t creation_time;
1785 if (mkv->mode != MODE_WEBM ||
1786 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1787 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1790 for (i = 0; i < s->nb_streams; i++) {
1791 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1792 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1793 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1797 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1798 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1799 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1800 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1801 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1802 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1803 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1804 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1805 end_ebml_master(pb, ebml_header);
1807 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1808 mkv->segment_offset = avio_tell(pb);
1810 // we write a seek head at the beginning to point to all other level
1811 // one elements (except Clusters).
1812 mkv_start_seekhead(mkv, pb);
1814 ret = start_ebml_master_crc32(&mkv->info.bc, mkv);
1819 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1820 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1821 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1822 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1823 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1824 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1825 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1827 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1829 if (mkv->mode != MODE_WEBM)
1830 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1832 const char *ident = "Lavf";
1833 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1834 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1837 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1838 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1839 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1840 uint8_t date_utc_buf[8];
1841 AV_WB64(date_utc_buf, date_utc);
1842 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1845 // reserve space for the duration
1847 mkv->duration_offset = avio_tell(pb);
1848 if (!mkv->is_live) {
1849 int64_t metadata_duration = get_metadata_duration(s);
1851 if (s->duration > 0) {
1852 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1853 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1854 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1855 } else if (metadata_duration > 0) {
1856 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1857 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1858 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1860 put_ebml_void(pb, 11); // assumes double-precision float to be written
1863 end_ebml_master_crc32_tentatively(s->pb, &mkv->info, mkv, MATROSKA_ID_INFO);
1866 ret = mkv_write_tracks(s);
1870 ret = mkv_write_chapters(s);
1874 if (mkv->mode != MODE_WEBM) {
1875 ret = mkv_write_attachments(s);
1880 /* Must come after mkv_write_chapters() because of chapter_id_offset */
1881 ret = mkv_write_tags(s);
1885 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || mkv->is_live) {
1886 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1891 if (s->metadata_header_padding > 0) {
1892 if (s->metadata_header_padding == 1)
1893 s->metadata_header_padding++;
1894 put_ebml_void(pb, s->metadata_header_padding);
1897 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1898 mkv->cues_pos = avio_tell(pb);
1899 if (mkv->reserve_cues_space == 1)
1900 mkv->reserve_cues_space++;
1901 put_ebml_void(pb, mkv->reserve_cues_space);
1904 av_init_packet(&mkv->cur_audio_pkt);
1905 mkv->cur_audio_pkt.size = 0;
1906 mkv->cluster_pos = -1;
1908 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1909 // after 4k and on a keyframe
1910 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1911 if (mkv->cluster_time_limit < 0)
1912 mkv->cluster_time_limit = 5000;
1913 if (mkv->cluster_size_limit < 0)
1914 mkv->cluster_size_limit = 5 * 1024 * 1024;
1916 if (mkv->cluster_time_limit < 0)
1917 mkv->cluster_time_limit = 1000;
1918 if (mkv->cluster_size_limit < 0)
1919 mkv->cluster_size_limit = 32 * 1024;
1925 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1927 int size = pkt_size + track_num_size + 3;
1928 size += ebml_length_size(size);
1929 size += 2; // EBML ID for block and block duration
1930 size += 9; // max size of block duration incl. length field
1934 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1941 dst = av_malloc(srclen);
1943 return AVERROR(ENOMEM);
1945 while (srclen >= WV_HEADER_SIZE) {
1948 ret = ff_wv_parse_header(&header, src);
1951 src += WV_HEADER_SIZE;
1952 srclen -= WV_HEADER_SIZE;
1954 if (srclen < header.blocksize) {
1955 ret = AVERROR_INVALIDDATA;
1959 if (header.initial) {
1960 AV_WL32(dst + offset, header.samples);
1963 AV_WL32(dst + offset, header.flags);
1964 AV_WL32(dst + offset + 4, header.crc);
1967 if (!(header.initial && header.final)) {
1968 AV_WL32(dst + offset, header.blocksize);
1972 memcpy(dst + offset, src, header.blocksize);
1973 src += header.blocksize;
1974 srclen -= header.blocksize;
1975 offset += header.blocksize;
1987 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1988 uint32_t blockid, const AVPacket *pkt, int keyframe)
1990 MatroskaMuxContext *mkv = s->priv_data;
1991 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1992 mkv_track *track = &mkv->tracks[pkt->stream_index];
1993 uint8_t *data = NULL, *side_data = NULL;
1994 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1995 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1996 uint64_t additional_id;
1997 int64_t discard_padding = 0;
1998 unsigned track_number = track->track_num;
1999 ebml_master block_group, block_additions, block_more;
2001 ts += track->ts_offset;
2003 /* The following string is identical to the one in mkv_write_vtt_blocks
2004 * so that only one copy needs to exist in binaries. */
2005 av_log(s, AV_LOG_DEBUG,
2006 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2007 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2008 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2009 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2010 mkv->cluster_pos, track_number, keyframe != 0);
2012 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2013 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2014 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2015 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2016 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2017 /* extradata is Annex B, assume the bitstream is too and convert it */
2018 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2019 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2020 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2021 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2022 err = mkv_strip_wavpack(pkt->data, &data, &size);
2027 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2028 "a packet from stream %d.\n", pkt->stream_index);
2032 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2033 /* Matroska specification requires to remove the first QuickTime atom
2039 side_data = av_packet_get_side_data(pkt,
2040 AV_PKT_DATA_SKIP_SAMPLES,
2042 if (side_data && side_data_size >= 10) {
2043 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2044 (AVRational){1, par->sample_rate},
2045 (AVRational){1, 1000000000});
2048 side_data = av_packet_get_side_data(pkt,
2049 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2052 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2053 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2057 side_data_size -= 8;
2061 if (side_data_size || discard_padding) {
2062 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2063 blockid = MATROSKA_ID_BLOCK;
2066 put_ebml_id(pb, blockid);
2067 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2068 put_ebml_num(pb, track_number, track->track_num_size);
2069 avio_wb16(pb, ts - mkv->cluster_pts);
2070 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2071 avio_write(pb, data + offset, size);
2072 if (data != pkt->data)
2075 if (blockid == MATROSKA_ID_BLOCK && !keyframe)
2076 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2077 track->last_timestamp = ts;
2079 if (discard_padding)
2080 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2082 if (side_data_size) {
2083 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2084 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2085 /* Until dbc50f8a our demuxer used a wrong default value
2086 * of BlockAddID, so we write it unconditionally. */
2087 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2088 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2089 side_data, side_data_size);
2090 end_ebml_master(pb, block_more);
2091 end_ebml_master(pb, block_additions);
2093 if (side_data_size || discard_padding)
2094 end_ebml_master(pb, block_group);
2099 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, const AVPacket *pkt)
2101 MatroskaMuxContext *mkv = s->priv_data;
2102 mkv_track *track = &mkv->tracks[pkt->stream_index];
2103 ebml_master blockgroup;
2104 int id_size, settings_size, size;
2105 uint8_t *id, *settings;
2106 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2107 const int flags = 0;
2110 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2114 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2117 size = id_size + 1 + settings_size + 1 + pkt->size;
2119 /* The following string is identical to the one in mkv_write_block so that
2120 * only one copy needs to exist in binaries. */
2121 av_log(s, AV_LOG_DEBUG,
2122 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2123 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2124 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2125 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2126 mkv->cluster_pos, track->track_num, 1);
2128 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2129 mkv_blockgroup_size(size, track->track_num_size));
2131 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2132 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2133 put_ebml_num(pb, track->track_num, track->track_num_size);
2134 avio_wb16(pb, ts - mkv->cluster_pts);
2136 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2138 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2139 end_ebml_master(pb, blockgroup);
2141 return pkt->duration;
2144 static void mkv_end_cluster(AVFormatContext *s)
2146 MatroskaMuxContext *mkv = s->priv_data;
2148 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv,
2149 MATROSKA_ID_CLUSTER, 0, 1, 0);
2150 if (!mkv->have_video) {
2151 for (unsigned i = 0; i < s->nb_streams; i++)
2152 mkv->tracks[i].has_cue = 0;
2154 mkv->cluster_pos = -1;
2155 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2158 static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
2160 MatroskaMuxContext *mkv = s->priv_data;
2161 mkv_track *track = &mkv->tracks[pkt->stream_index];
2162 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2164 int side_data_size = 0, ret;
2166 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2169 switch (par->codec_id) {
2170 case AV_CODEC_ID_AAC:
2171 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2172 int filler, output_sample_rate = 0;
2173 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2174 &output_sample_rate);
2177 if (!output_sample_rate)
2178 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2179 ret = ff_alloc_extradata(par, side_data_size);
2182 memcpy(par->extradata, side_data, side_data_size);
2183 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2184 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2185 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->track.bc) - track->codecpriv_offset);
2187 put_ebml_void(mkv->track.bc, filler);
2188 avio_seek(mkv->track.bc, track->sample_rate_offset, SEEK_SET);
2189 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2190 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2191 } else if (!par->extradata_size && !track->sample_rate) {
2192 // No extradata (codecpar or packet side data).
2193 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2194 return AVERROR(EINVAL);
2197 case AV_CODEC_ID_FLAC:
2198 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2199 uint8_t *old_extradata = par->extradata;
2200 if (side_data_size != par->extradata_size) {
2201 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2203 return AVERROR(EINVAL);
2205 par->extradata = side_data;
2206 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2207 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2208 par->extradata = old_extradata;
2211 // FIXME: Remove the following once libaom starts propagating extradata during init()
2212 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2213 case AV_CODEC_ID_AV1:
2214 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2215 !par->extradata_size) {
2216 AVIOContext *dyn_cp;
2219 ret = avio_open_dyn_buf(&dyn_cp);
2222 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2223 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2224 if (!codecpriv_size) {
2226 return AVERROR_INVALIDDATA;
2228 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2229 // Do not write the OBUs as we don't have space saved for them
2230 put_ebml_binary(mkv->track.bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2232 ret = ff_alloc_extradata(par, side_data_size);
2235 memcpy(par->extradata, side_data, side_data_size);
2236 } else if (!par->extradata_size)
2237 return AVERROR_INVALIDDATA;
2241 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2248 static int mkv_write_packet_internal(AVFormatContext *s, const AVPacket *pkt)
2250 MatroskaMuxContext *mkv = s->priv_data;
2252 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2253 mkv_track *track = &mkv->tracks[pkt->stream_index];
2254 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2255 int duration = pkt->duration;
2257 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2258 int64_t relative_packet_pos;
2260 if (ts == AV_NOPTS_VALUE) {
2261 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2262 return AVERROR(EINVAL);
2264 ts += track->ts_offset;
2266 if (mkv->cluster_pos != -1) {
2267 int64_t cluster_time = ts - mkv->cluster_pts;
2268 if ((int16_t)cluster_time != cluster_time) {
2270 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2274 if (mkv->cluster_pos == -1) {
2275 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2278 mkv->cluster_pos = avio_tell(s->pb);
2279 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2280 mkv->cluster_pts = FFMAX(0, ts);
2281 av_log(s, AV_LOG_DEBUG,
2282 "Starting new cluster with timestamp "
2283 "%" PRId64 " at offset %" PRId64 " bytes\n",
2284 mkv->cluster_pts, mkv->cluster_pos);
2286 pb = mkv->cluster_bc;
2288 relative_packet_pos = avio_tell(pb);
2290 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2291 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2294 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
2295 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2296 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2297 mkv->cluster_pos, relative_packet_pos, -1);
2303 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2304 duration = mkv_write_vtt_blocks(s, pb, pkt);
2306 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2307 mkv_blockgroup_size(pkt->size,
2308 track->track_num_size));
2310 #if FF_API_CONVERGENCE_DURATION
2311 FF_DISABLE_DEPRECATION_WARNINGS
2312 /* For backward compatibility, prefer convergence_duration. */
2313 if (pkt->convergence_duration > 0) {
2314 duration = pkt->convergence_duration;
2316 FF_ENABLE_DEPRECATION_WARNINGS
2318 /* All subtitle blocks are considered to be keyframes. */
2319 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2320 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2321 end_ebml_master(pb, blockgroup);
2324 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2325 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2326 mkv->cluster_pos, relative_packet_pos, duration);
2332 mkv->duration = FFMAX(mkv->duration, ts + duration);
2333 track->duration = FFMAX(track->duration, ts + duration);
2338 static int mkv_write_packet(AVFormatContext *s, const AVPacket *pkt)
2340 MatroskaMuxContext *mkv = s->priv_data;
2341 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2342 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2344 int64_t cluster_time;
2346 int start_new_cluster;
2348 ret = mkv_check_new_extra_data(s, pkt);
2352 if (mkv->cluster_pos != -1) {
2353 if (mkv->tracks[pkt->stream_index].write_dts)
2354 cluster_time = pkt->dts - mkv->cluster_pts;
2356 cluster_time = pkt->pts - mkv->cluster_pts;
2357 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2359 cluster_size = avio_tell(mkv->cluster_bc);
2361 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2362 // WebM DASH specification states that the first block of
2363 // every Cluster has to be a key frame. So for DASH video,
2364 // we only create a Cluster on seeing key frames.
2365 start_new_cluster = keyframe;
2366 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2367 cluster_time > mkv->cluster_time_limit) {
2368 // For DASH audio, we create a Cluster based on cluster_time_limit.
2369 start_new_cluster = 1;
2370 } else if (!mkv->is_dash &&
2371 (cluster_size > mkv->cluster_size_limit ||
2372 cluster_time > mkv->cluster_time_limit ||
2373 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2374 cluster_size > 4 * 1024))) {
2375 start_new_cluster = 1;
2377 start_new_cluster = 0;
2379 if (start_new_cluster)
2383 if (!mkv->cluster_pos)
2384 avio_write_marker(s->pb,
2385 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2386 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2388 // check if we have an audio packet cached
2389 if (mkv->cur_audio_pkt.size > 0) {
2390 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2391 av_packet_unref(&mkv->cur_audio_pkt);
2393 av_log(s, AV_LOG_ERROR,
2394 "Could not write cached audio packet ret:%d\n", ret);
2399 // buffer an audio packet to ensure the packet containing the video
2400 // keyframe's timecode is contained in the same cluster for WebM
2401 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2403 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2405 ret = mkv_write_packet_internal(s, pkt);
2409 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2411 MatroskaMuxContext *mkv = s->priv_data;
2414 if (mkv->cluster_pos != -1) {
2416 av_log(s, AV_LOG_DEBUG,
2417 "Flushing cluster at offset %" PRIu64 " bytes\n",
2422 return mkv_write_packet(s, pkt);
2425 static int mkv_write_trailer(AVFormatContext *s)
2427 MatroskaMuxContext *mkv = s->priv_data;
2428 AVIOContext *pb = s->pb;
2431 // check if we have an audio packet cached
2432 if (mkv->cur_audio_pkt.size > 0) {
2433 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2435 av_log(s, AV_LOG_ERROR,
2436 "Could not write cached audio packet ret:%d\n", ret);
2441 if (mkv->cluster_pos != -1) {
2442 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2443 MATROSKA_ID_CLUSTER, 0, 0, 0);
2446 ret = mkv_write_chapters(s);
2451 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2452 int64_t endpos, ret64;
2454 endpos = avio_tell(pb);
2456 if (mkv->cues.num_entries) {
2457 AVIOContext *cues = NULL;
2459 int length_size = 0;
2461 ret = start_ebml_master_crc32(&cues, mkv);
2465 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2466 mkv->tracks, s->nb_streams);
2468 ffio_free_dyn_buf(&cues);
2472 if (mkv->reserve_cues_space) {
2473 size = avio_tell(cues);
2474 length_size = ebml_length_size(size);
2475 size += 4 + length_size;
2476 if (mkv->reserve_cues_space < size) {
2477 av_log(s, AV_LOG_WARNING,
2478 "Insufficient space reserved for Cues: "
2479 "%d < %"PRIu64". No Cues will be output.\n",
2480 mkv->reserve_cues_space, size);
2481 mkv->reserve_cues_space = -1;
2482 ffio_free_dyn_buf(&cues);
2485 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2486 ffio_free_dyn_buf(&cues);
2489 if (mkv->reserve_cues_space == size + 1) {
2490 /* There is no way to reserve a single byte because
2491 * the minimal size of an EBML Void element is 2
2492 * (1 byte ID, 1 byte length field). This problem
2493 * is solved by writing the Cues' length field on
2494 * one byte more than necessary. */
2500 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2502 if (mkv->reserve_cues_space) {
2503 if (size < mkv->reserve_cues_space)
2504 put_ebml_void(pb, mkv->reserve_cues_space - size);
2506 endpos = avio_tell(pb);
2510 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info.pos);
2514 // update the duration
2515 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2516 avio_seek(mkv->info.bc, mkv->duration_offset, SEEK_SET);
2517 put_ebml_float(mkv->info.bc, MATROSKA_ID_DURATION, mkv->duration);
2518 end_ebml_master_crc32(pb, &mkv->info.bc, mkv, MATROSKA_ID_INFO, 0, 0, 0);
2520 if (mkv->track.bc) {
2521 // write Tracks master
2522 avio_seek(pb, mkv->track.pos, SEEK_SET);
2523 end_ebml_master_crc32(pb, &mkv->track.bc, mkv,
2524 MATROSKA_ID_TRACKS, 0, 0, 0);
2527 // update stream durations
2530 for (i = 0; i < s->nb_streams; ++i) {
2531 const AVStream *st = s->streams[i];
2532 const mkv_track *track = &mkv->tracks[i];
2534 if (track->duration_offset > 0) {
2535 double duration_sec = track->duration * av_q2d(st->time_base);
2536 char duration_string[20] = "";
2538 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2541 avio_seek(mkv->tags.bc, track->duration_offset, SEEK_SET);
2543 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2544 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2545 fmod(duration_sec, 60));
2547 put_ebml_binary(mkv->tags.bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2551 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2552 end_ebml_master_crc32(pb, &mkv->tags.bc, mkv,
2553 MATROSKA_ID_TAGS, 0, 0, 0);
2556 avio_seek(pb, endpos, SEEK_SET);
2560 end_ebml_master(pb, mkv->segment);
2562 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2565 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2568 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2569 if (ff_mkv_codec_tags[i].id == codec_id)
2572 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2573 enum AVMediaType type = avcodec_get_type(codec_id);
2574 // mkv theoretically supports any video/audio through VFW/ACM
2575 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2582 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2585 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2586 if (ff_webm_codec_tags[i].id == codec_id)
2592 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2597 uid = (uint64_t)av_lfg_get(c) << 32;
2598 uid |= av_lfg_get(c);
2601 for (k = 0; k < i; k++) {
2602 if (tracks[k].uid == uid)
2610 static int mkv_init(struct AVFormatContext *s)
2612 MatroskaMuxContext *mkv = s->priv_data;
2614 unsigned nb_tracks = 0;
2617 for (i = 0; i < s->nb_streams; i++) {
2618 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2619 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2620 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2621 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2622 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2623 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2624 av_log(s, AV_LOG_ERROR,
2625 "The Matroska muxer does not yet support muxing %s\n",
2626 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2627 return AVERROR_PATCHWELCOME;
2631 if (s->avoid_negative_ts < 0) {
2632 s->avoid_negative_ts = 1;
2633 s->internal->avoid_negative_ts_use_pts = 1;
2636 if (!strcmp(s->oformat->name, "webm")) {
2637 mkv->mode = MODE_WEBM;
2640 mkv->mode = MODE_MATROSKAv2;
2642 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2644 return AVERROR(ENOMEM);
2646 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2647 av_lfg_init(&c, av_get_random_seed());
2649 // Calculate the SegmentUID now in order not to waste our random seed.
2650 for (i = 0; i < 4; i++)
2651 mkv->segment_uid[i] = av_lfg_get(&c);
2654 for (i = 0; i < s->nb_streams; i++) {
2655 AVStream *st = s->streams[i];
2656 mkv_track *track = &mkv->tracks[i];
2658 if (s->flags & AVFMT_FLAG_BITEXACT) {
2661 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2664 // ms precision is the de-facto standard timescale for mkv files
2665 avpriv_set_pts_info(st, 64, 1, 1000);
2667 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2668 if (mkv->mode == MODE_WEBM) {
2669 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2670 "as WebM doesn't support attachments.\n", i);
2671 } else if (!get_mimetype(st)) {
2672 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype "
2673 "tag and it cannot be deduced from the codec id.\n", i);
2674 return AVERROR(EINVAL);
2676 mkv->nb_attachments++;
2681 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2682 track->track_num_size = ebml_num_size(track->track_num);
2685 if (mkv->is_dash && nb_tracks != 1)
2686 return AVERROR(EINVAL);
2691 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2694 AVStream *st = s->streams[pkt->stream_index];
2696 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2697 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2698 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2699 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2700 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2706 static const AVCodecTag additional_audio_tags[] = {
2707 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2708 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2709 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2710 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2711 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2712 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2713 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2714 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2715 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2716 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2717 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2718 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2719 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2722 static const AVCodecTag additional_video_tags[] = {
2723 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2724 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2725 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2726 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2729 static const AVCodecTag additional_subtitle_tags[] = {
2730 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2731 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2732 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2733 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2736 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2737 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2738 static const AVOption options[] = {
2739 { "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 },
2740 { "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 },
2741 { "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 },
2742 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2743 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2744 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2745 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2746 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2747 { "default_mode", "Controls how a track's FlagDefault is inferred", OFFSET(default_mode), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MODE_INFER }, DEFAULT_MODE_INFER, DEFAULT_MODE_PASSTHROUGH, FLAGS, "default_mode" },
2748 { "infer", "For each track type, mark the first track of disposition default as default; if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER }, 0, 0, FLAGS, "default_mode" },
2749 { "infer_no_subs", "For each track type, mark the first track of disposition default as default; for audio and video: if none exists, mark the first track as default.", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_INFER_NO_SUBS }, 0, 0, FLAGS, "default_mode" },
2750 { "passthrough", "Use the disposition flag as-is", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_PASSTHROUGH }, 0, 0, FLAGS, "default_mode" },
2754 #if CONFIG_MATROSKA_MUXER
2755 static const AVClass matroska_class = {
2756 .class_name = "matroska muxer",
2757 .item_name = av_default_item_name,
2759 .version = LIBAVUTIL_VERSION_INT,
2762 AVOutputFormat ff_matroska_muxer = {
2764 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2765 .mime_type = "video/x-matroska",
2766 .extensions = "mkv",
2767 .priv_data_size = sizeof(MatroskaMuxContext),
2768 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2769 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2770 .video_codec = CONFIG_LIBX264_ENCODER ?
2771 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2773 .deinit = mkv_deinit,
2774 .write_header = mkv_write_header,
2775 .write_packet = mkv_write_flush_packet,
2776 .write_trailer = mkv_write_trailer,
2777 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2778 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2779 .codec_tag = (const AVCodecTag* const []){
2780 ff_codec_bmp_tags, ff_codec_wav_tags,
2781 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2783 .subtitle_codec = AV_CODEC_ID_ASS,
2784 .query_codec = mkv_query_codec,
2785 .check_bitstream = mkv_check_bitstream,
2786 .priv_class = &matroska_class,
2790 #if CONFIG_WEBM_MUXER
2791 static const AVClass webm_class = {
2792 .class_name = "webm muxer",
2793 .item_name = av_default_item_name,
2795 .version = LIBAVUTIL_VERSION_INT,
2798 AVOutputFormat ff_webm_muxer = {
2800 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2801 .mime_type = "video/webm",
2802 .extensions = "webm",
2803 .priv_data_size = sizeof(MatroskaMuxContext),
2804 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2805 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2806 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2808 .deinit = mkv_deinit,
2809 .write_header = mkv_write_header,
2810 .write_packet = mkv_write_flush_packet,
2811 .write_trailer = mkv_write_trailer,
2812 .query_codec = webm_query_codec,
2813 .check_bitstream = mkv_check_bitstream,
2814 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2815 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2816 .priv_class = &webm_class,
2820 #if CONFIG_MATROSKA_AUDIO_MUXER
2821 static const AVClass mka_class = {
2822 .class_name = "matroska audio muxer",
2823 .item_name = av_default_item_name,
2825 .version = LIBAVUTIL_VERSION_INT,
2827 AVOutputFormat ff_matroska_audio_muxer = {
2829 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2830 .mime_type = "audio/x-matroska",
2831 .extensions = "mka",
2832 .priv_data_size = sizeof(MatroskaMuxContext),
2833 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2834 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2835 .video_codec = AV_CODEC_ID_NONE,
2837 .deinit = mkv_deinit,
2838 .write_header = mkv_write_header,
2839 .write_packet = mkv_write_flush_packet,
2840 .write_trailer = mkv_write_trailer,
2841 .check_bitstream = mkv_check_bitstream,
2842 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2844 .codec_tag = (const AVCodecTag* const []){
2845 ff_codec_wav_tags, additional_audio_tags, 0
2847 .priv_class = &mka_class,