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 {
97 int64_t sample_rate_offset;
98 int64_t last_timestamp;
100 int64_t duration_offset;
101 int64_t codecpriv_offset;
105 #define MODE_MATROSKAv2 0x01
106 #define MODE_WEBM 0x02
108 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
109 * range 1 to 126 (inclusive) */
110 #define MAX_TRACKS 126
112 typedef struct MatroskaMuxContext {
113 const AVClass *class;
115 AVIOContext *tags_bc;
117 AVIOContext *info_bc;
119 AVIOContext *tracks_bc;
122 int64_t segment_offset;
123 AVIOContext *cluster_bc;
124 int64_t cluster_pos; ///< file offset of the current cluster
126 int64_t duration_offset;
128 mkv_seekhead seekhead;
132 AVPacket cur_audio_pkt;
134 int have_attachments;
137 int reserve_cues_space;
138 int cluster_size_limit;
140 int64_t cluster_time_limit;
142 int dash_track_number;
146 uint32_t chapter_id_offset;
151 uint32_t segment_uid[4];
152 } MatroskaMuxContext;
154 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
155 * 8 byte for "matroska" doctype string */
156 #define MAX_EBML_HEADER_SIZE 35
158 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
159 * offset, 4 bytes for target EBML ID */
160 #define MAX_SEEKENTRY_SIZE 21
162 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
163 #define MAX_CUETRACKPOS_SIZE 40
165 /** Seek preroll value for opus */
166 #define OPUS_SEEK_PREROLL 80000000
168 static int ebml_id_size(uint32_t id)
170 return (av_log2(id) + 7U) / 8;
173 static void put_ebml_id(AVIOContext *pb, uint32_t id)
175 int i = ebml_id_size(id);
177 avio_w8(pb, (uint8_t)(id >> (i * 8)));
181 * Write an EBML size meaning "unknown size".
183 * @param bytes The number of bytes the size should occupy (maximum: 8).
185 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
187 av_assert0(bytes <= 8);
188 avio_w8(pb, 0x1ff >> bytes);
189 ffio_fill(pb, 0xff, bytes - 1);
193 * Returns how many bytes are needed to represent a number
194 * as EBML variable length integer.
196 static int ebml_num_size(uint64_t num)
206 * Calculate how many bytes are needed to represent the length field
207 * of an EBML element whose payload has a given length.
209 static int ebml_length_size(uint64_t length)
211 return ebml_num_size(length + 1);
215 * Write a number as EBML variable length integer on `bytes` bytes.
216 * `bytes` is taken literally without checking.
218 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
220 num |= 1ULL << bytes * 7;
221 for (int i = bytes - 1; i >= 0; i--)
222 avio_w8(pb, (uint8_t)(num >> i * 8));
226 * Write a length as EBML variable length integer.
228 * @param bytes The number of bytes that need to be used to write the number.
229 * If zero, the minimal number of bytes will be used.
231 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
233 int needed_bytes = ebml_length_size(length);
235 // sizes larger than this are currently undefined in EBML
236 av_assert0(length < (1ULL << 56) - 1);
239 bytes = needed_bytes;
240 // The bytes needed to write the given size must not exceed
241 // the bytes that we ought to use.
242 av_assert0(bytes >= needed_bytes);
243 put_ebml_num(pb, length, bytes);
247 * Write a (random) UID with fixed size to make the output more deterministic
249 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
251 put_ebml_id(pb, elementid);
252 put_ebml_length(pb, 8, 0);
256 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
263 put_ebml_id(pb, elementid);
264 put_ebml_length(pb, bytes, 0);
265 for (i = bytes - 1; i >= 0; i--)
266 avio_w8(pb, (uint8_t)(val >> i * 8));
269 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
272 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
274 while (tmp>>=8) bytes++;
276 put_ebml_id(pb, elementid);
277 put_ebml_length(pb, bytes, 0);
278 for (i = bytes - 1; i >= 0; i--)
279 avio_w8(pb, (uint8_t)(val >> i * 8));
282 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
284 put_ebml_id(pb, elementid);
285 put_ebml_length(pb, 8, 0);
286 avio_wb64(pb, av_double2int(val));
289 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
290 const void *buf, int size)
292 put_ebml_id(pb, elementid);
293 put_ebml_length(pb, size, 0);
294 avio_write(pb, buf, size);
297 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
300 put_ebml_binary(pb, elementid, str, strlen(str));
304 * Write a void element of a given size. Useful for reserving space in
305 * the file to be written to later.
307 * @param size The number of bytes to reserve, which must be at least 2.
309 static void put_ebml_void(AVIOContext *pb, int size)
311 av_assert0(size >= 2);
313 put_ebml_id(pb, EBML_ID_VOID);
314 // we need to subtract the length needed to store the size from the
315 // size we need to reserve so 2 cases, we use 8 bytes to store the
316 // size if possible, 1 byte otherwise
319 put_ebml_length(pb, size, 0);
322 put_ebml_length(pb, size, 8);
324 ffio_fill(pb, 0, size);
327 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
328 uint64_t expectedsize)
330 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
332 put_ebml_id(pb, elementid);
333 put_ebml_size_unknown(pb, bytes);
334 return (ebml_master) { avio_tell(pb), bytes };
337 static void end_ebml_master(AVIOContext *pb, ebml_master master)
339 int64_t pos = avio_tell(pb);
341 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
343 put_ebml_length(pb, pos - master.pos, master.sizebytes);
344 avio_seek(pb, pos, SEEK_SET);
347 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
351 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
355 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
360 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
361 MatroskaMuxContext *mkv, uint32_t id,
362 int length_size, int keep_buffer)
364 uint8_t *buf, crc[4];
368 size = avio_get_dyn_buf(*dyn_cp, &buf);
369 put_ebml_length(pb, size, length_size);
370 if (mkv->write_crc) {
371 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
372 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
373 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
375 avio_write(pb, buf + skip, size - skip);
378 ffio_reset_dyn_buf(*dyn_cp);
380 ffio_free_dyn_buf(dyn_cp);
385 * Complete ebml master without destroying the buffer, allowing for later updates
387 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext *dyn_cp,
388 uint32_t id, int64_t *pos)
391 int size = avio_get_dyn_buf(dyn_cp, &buf);
393 *pos = avio_tell(pb);
396 put_ebml_length(pb, size, 0);
397 avio_write(pb, buf, size);
400 static void put_xiph_size(AVIOContext *pb, int size)
402 ffio_fill(pb, 255, size / 255);
403 avio_w8(pb, size % 255);
407 * Free the members allocated in the mux context.
409 static void mkv_deinit(AVFormatContext *s)
411 MatroskaMuxContext *mkv = s->priv_data;
413 av_packet_unref(&mkv->cur_audio_pkt);
415 ffio_free_dyn_buf(&mkv->cluster_bc);
416 ffio_free_dyn_buf(&mkv->info_bc);
417 ffio_free_dyn_buf(&mkv->tracks_bc);
418 ffio_free_dyn_buf(&mkv->tags_bc);
420 av_freep(&mkv->cues.entries);
421 av_freep(&mkv->tracks);
425 * Initialize the SeekHead element to be ready to index level 1 Matroska
426 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
427 * will be reserved at the current file location.
429 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
431 mkv->seekhead.filepos = avio_tell(pb);
432 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
433 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
434 // that an EBML void element will fit afterwards
435 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
436 put_ebml_void(pb, mkv->seekhead.reserved_size);
439 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
442 mkv_seekhead *seekhead = &mkv->seekhead;
444 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
446 seekhead->entries[seekhead->num_entries].elementid = elementid;
447 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
451 * Write the SeekHead to the file at the location reserved for it
452 * and seek to destpos afterwards. When error_on_seek_failure
453 * is not set, failure to seek to the position designated for the
454 * SeekHead is not considered an error and it is presumed that
455 * destpos is the current position; failure to seek to destpos
456 * afterwards is always an error.
458 * @return 0 on success, < 0 on error.
460 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
461 int error_on_seek_failure, int64_t destpos)
463 AVIOContext *dyn_cp = NULL;
464 mkv_seekhead *seekhead = &mkv->seekhead;
465 int64_t remaining, ret64;
468 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
469 return error_on_seek_failure ? ret64 : 0;
471 ret = start_ebml_master_crc32(&dyn_cp, mkv);
475 for (i = 0; i < seekhead->num_entries; i++) {
476 mkv_seekhead_entry *entry = &seekhead->entries[i];
477 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
480 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
481 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
482 put_ebml_id(dyn_cp, entry->elementid);
484 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
485 end_ebml_master(dyn_cp, seekentry);
487 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD, 0, 0);
489 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
490 put_ebml_void(pb, remaining);
492 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
498 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
499 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
501 mkv_cues *cues = &mkv->cues;
502 mkv_cuepoint *entries = cues->entries;
507 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
509 return AVERROR(ENOMEM);
510 cues->entries = entries;
512 cues->entries[cues->num_entries].pts = ts;
513 cues->entries[cues->num_entries].stream_idx = stream;
514 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
515 cues->entries[cues->num_entries].relative_pos = relative_pos;
516 cues->entries[cues->num_entries++].duration = duration;
521 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
522 mkv_cues *cues, mkv_track *tracks, int num_tracks)
524 AVIOContext *cuepoint;
527 ret = avio_open_dyn_buf(&cuepoint);
531 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
533 uint64_t pts = entry->pts;
537 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
539 // put all the entries from different tracks that have the exact same
540 // timestamp into the same CuePoint
541 for (int j = 0; j < num_tracks; j++)
542 tracks[j].has_cue = 0;
544 ebml_master track_positions;
545 int idx = entry->stream_idx;
547 av_assert0(idx >= 0 && idx < num_tracks);
548 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
550 tracks[idx].has_cue = 1;
551 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
552 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
553 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
554 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
555 if (entry->duration != -1)
556 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
557 end_ebml_master(cuepoint, track_positions);
558 } while (++entry < end && entry->pts == pts);
559 size = avio_get_dyn_buf(cuepoint, &buf);
560 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
561 ffio_reset_dyn_buf(cuepoint);
563 ffio_free_dyn_buf(&cuepoint);
568 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
570 const uint8_t *header_start[3];
572 int first_header_size;
575 if (par->codec_id == AV_CODEC_ID_VORBIS)
576 first_header_size = 30;
578 first_header_size = 42;
580 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
581 first_header_size, header_start, header_len) < 0) {
582 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
586 avio_w8(pb, 2); // number packets - 1
587 for (j = 0; j < 2; j++) {
588 put_xiph_size(pb, header_len[j]);
590 for (j = 0; j < 3; j++)
591 avio_write(pb, header_start[j], header_len[j]);
596 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
598 if (par->extradata && par->extradata_size == 2)
599 avio_write(pb, par->extradata, 2);
601 avio_wl16(pb, 0x410); // fallback to the most recent version
605 static int put_flac_codecpriv(AVFormatContext *s,
606 AVIOContext *pb, AVCodecParameters *par)
608 int write_comment = (par->channel_layout &&
609 !(par->channel_layout & ~0x3ffffULL) &&
610 !ff_flac_is_native_layout(par->channel_layout));
611 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
618 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
619 "Lavf" : LIBAVFORMAT_IDENT;
620 AVDictionary *dict = NULL;
621 uint8_t buf[32], *data, *p;
624 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
625 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
627 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
628 if (len >= ((1<<24) - 4)) {
630 return AVERROR(EINVAL);
633 data = av_malloc(len + 4);
636 return AVERROR(ENOMEM);
640 AV_WB24(data + 1, len);
643 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
645 avio_write(pb, data, len + 4);
654 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
655 int *sample_rate, int *output_sample_rate)
657 MPEG4AudioConfig mp4ac;
660 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
661 /* Don't abort if the failure is because of missing extradata. Assume in that
662 * case a bitstream filter will provide the muxer with the extradata in the
664 * Abort however if s->pb is not seekable, as we would not be able to seek back
665 * to write the sample rate elements once the extradata shows up, anyway. */
666 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
667 av_log(s, AV_LOG_ERROR,
668 "Error parsing AAC extradata, unable to determine samplerate.\n");
669 return AVERROR(EINVAL);
673 /* This will only happen when this function is called while writing the
674 * header and no extradata is available. The space for this element has
675 * to be reserved for when this function is called again after the
676 * extradata shows up in the first packet, as there's no way to know if
677 * output_sample_rate will be different than sample_rate or not. */
678 *output_sample_rate = *sample_rate;
680 *sample_rate = mp4ac.sample_rate;
681 *output_sample_rate = mp4ac.ext_sample_rate;
686 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
687 AVCodecParameters *par,
690 switch (par->codec_id) {
691 case AV_CODEC_ID_VORBIS:
692 case AV_CODEC_ID_THEORA:
693 return put_xiph_codecpriv(s, dyn_cp, par);
694 case AV_CODEC_ID_FLAC:
695 return put_flac_codecpriv(s, dyn_cp, par);
696 case AV_CODEC_ID_WAVPACK:
697 return put_wv_codecpriv(dyn_cp, par);
698 case AV_CODEC_ID_H264:
699 return ff_isom_write_avcc(dyn_cp, par->extradata,
700 par->extradata_size);
701 case AV_CODEC_ID_HEVC:
702 return ff_isom_write_hvcc(dyn_cp, par->extradata,
703 par->extradata_size, 0);
704 case AV_CODEC_ID_AV1:
705 if (par->extradata_size)
706 return ff_isom_write_av1c(dyn_cp, par->extradata,
707 par->extradata_size);
709 put_ebml_void(pb, 4 + 3);
711 case AV_CODEC_ID_ALAC:
712 if (par->extradata_size < 36) {
713 av_log(s, AV_LOG_ERROR,
714 "Invalid extradata found, ALAC expects a 36-byte "
716 return AVERROR_INVALIDDATA;
718 avio_write(dyn_cp, par->extradata + 12,
719 par->extradata_size - 12);
721 case AV_CODEC_ID_AAC:
722 if (par->extradata_size)
723 avio_write(dyn_cp, par->extradata, par->extradata_size);
725 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
728 if (par->codec_id == AV_CODEC_ID_PRORES &&
729 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
730 avio_wl32(dyn_cp, par->codec_tag);
731 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
732 avio_write(dyn_cp, par->extradata, par->extradata_size);
738 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
739 AVCodecParameters *par,
740 int native_id, int qt_id)
744 int ret, codecpriv_size;
746 ret = avio_open_dyn_buf(&dyn_cp);
751 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
752 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
755 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
757 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
758 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
761 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
762 avio_wl32(dyn_cp, par->codec_tag);
763 for(i = 0; i < 0x5a - 8; i++)
766 avio_write(dyn_cp, par->extradata, par->extradata_size);
768 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
769 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
770 avcodec_get_name(par->codec_id));
773 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
775 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
776 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
777 avcodec_get_name(par->codec_id));
778 ret = AVERROR(EINVAL);
781 ff_put_bmp_header(dyn_cp, par, 0, 0);
783 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
785 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
787 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
788 avcodec_get_name(par->codec_id));
789 ret = AVERROR(EINVAL);
792 par->codec_tag = tag;
794 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
797 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
799 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
801 ffio_free_dyn_buf(&dyn_cp);
805 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
807 uint8_t *colorinfo_ptr;
808 int side_data_size = 0;
809 int ret, colorinfo_size;
810 const uint8_t *side_data;
812 ret = avio_open_dyn_buf(&dyn_cp);
816 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
817 par->color_trc < AVCOL_TRC_NB) {
818 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
821 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
822 par->color_space < AVCOL_SPC_NB) {
823 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
825 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
826 par->color_primaries < AVCOL_PRI_NB) {
827 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
829 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
830 par->color_range < AVCOL_RANGE_NB) {
831 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
833 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
834 par->chroma_location <= AVCHROMA_LOC_TOP) {
837 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
838 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
839 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
842 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
844 if (side_data_size) {
845 const AVContentLightMetadata *metadata =
846 (const AVContentLightMetadata*)side_data;
847 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
848 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
851 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
853 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
854 ebml_master meta_element = start_ebml_master(
855 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
856 const AVMasteringDisplayMetadata *metadata =
857 (const AVMasteringDisplayMetadata*)side_data;
858 if (metadata->has_primaries) {
859 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
860 av_q2d(metadata->display_primaries[0][0]));
861 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
862 av_q2d(metadata->display_primaries[0][1]));
863 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
864 av_q2d(metadata->display_primaries[1][0]));
865 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
866 av_q2d(metadata->display_primaries[1][1]));
867 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
868 av_q2d(metadata->display_primaries[2][0]));
869 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
870 av_q2d(metadata->display_primaries[2][1]));
871 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
872 av_q2d(metadata->white_point[0]));
873 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
874 av_q2d(metadata->white_point[1]));
876 if (metadata->has_luminance) {
877 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
878 av_q2d(metadata->max_luminance));
879 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
880 av_q2d(metadata->min_luminance));
882 end_ebml_master(dyn_cp, meta_element);
885 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
886 if (colorinfo_size) {
887 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
888 avio_write(pb, colorinfo_ptr, colorinfo_size);
889 end_ebml_master(pb, colorinfo);
891 ffio_free_dyn_buf(&dyn_cp);
895 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
898 ebml_master projection;
899 int side_data_size = 0;
902 const AVSphericalMapping *spherical =
903 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
909 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
910 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
911 spherical->projection != AV_SPHERICAL_CUBEMAP) {
912 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
916 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
917 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
918 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
919 4 * (2 + 1 + 8) + (2 + 1 + 20));
921 switch (spherical->projection) {
922 case AV_SPHERICAL_EQUIRECTANGULAR:
923 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
924 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
926 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
927 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
928 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
929 AV_WB32(private, 0); // version + flags
930 AV_WB32(private + 4, spherical->bound_top);
931 AV_WB32(private + 8, spherical->bound_bottom);
932 AV_WB32(private + 12, spherical->bound_left);
933 AV_WB32(private + 16, spherical->bound_right);
934 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
937 case AV_SPHERICAL_CUBEMAP:
938 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
939 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
940 AV_WB32(private, 0); // version + flags
941 AV_WB32(private + 4, 0); // layout
942 AV_WB32(private + 8, spherical->padding);
943 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
951 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
952 (double) spherical->yaw / (1 << 16));
953 if (spherical->pitch)
954 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
955 (double) spherical->pitch / (1 << 16));
957 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
958 (double) spherical->roll / (1 << 16));
960 end_ebml_master(pb, projection);
965 static void mkv_write_field_order(AVIOContext *pb, int mode,
966 enum AVFieldOrder field_order)
968 switch (field_order) {
969 case AV_FIELD_UNKNOWN:
971 case AV_FIELD_PROGRESSIVE:
972 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
973 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
979 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
980 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
981 if (mode != MODE_WEBM) {
982 switch (field_order) {
984 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
985 MATROSKA_VIDEO_FIELDORDER_TT);
988 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
989 MATROSKA_VIDEO_FIELDORDER_BB);
992 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
993 MATROSKA_VIDEO_FIELDORDER_TB);
996 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
997 MATROSKA_VIDEO_FIELDORDER_BT);
1004 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1005 AVStream *st, int mode, int *h_width, int *h_height)
1009 AVDictionaryEntry *tag;
1010 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1014 // convert metadata into proper side data and add it to the stream
1015 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1016 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1017 int stereo_mode = atoi(tag->value);
1019 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1020 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1025 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1026 stereo_mode != 10 && stereo_mode != 12) {
1027 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1033 // iterate to find the stereo3d side data
1034 for (i = 0; i < st->nb_side_data; i++) {
1035 AVPacketSideData sd = st->side_data[i];
1036 if (sd.type == AV_PKT_DATA_STEREO3D) {
1037 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1039 switch (stereo->type) {
1040 case AV_STEREO3D_2D:
1041 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1043 case AV_STEREO3D_SIDEBYSIDE:
1044 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1045 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1046 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1049 case AV_STEREO3D_TOPBOTTOM:
1050 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1051 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1055 case AV_STEREO3D_CHECKERBOARD:
1056 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1057 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1060 case AV_STEREO3D_LINES:
1061 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1062 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1066 case AV_STEREO3D_COLUMNS:
1067 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1068 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1072 case AV_STEREO3D_FRAMESEQUENCE:
1073 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1074 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1082 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1085 // if webm, do not write unsupported modes
1086 if ((mode == MODE_WEBM &&
1087 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1088 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1089 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1090 av_log(s, AV_LOG_ERROR,
1091 "The specified stereo mode is not valid.\n");
1092 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1093 return AVERROR(EINVAL);
1096 // write StereoMode if format is valid
1097 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1102 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1103 AVStream *st, mkv_track *track, AVIOContext *pb,
1104 int default_stream_exists)
1106 AVCodecParameters *par = st->codecpar;
1107 ebml_master subinfo, track_master;
1111 int sample_rate = par->sample_rate;
1112 int output_sample_rate = 0;
1113 int display_width_div = 1;
1114 int display_height_div = 1;
1116 AVDictionaryEntry *tag;
1118 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1119 mkv->have_attachments = 1;
1123 if (par->codec_id == AV_CODEC_ID_AAC) {
1124 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1125 &output_sample_rate);
1130 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1131 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1132 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1133 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1135 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1136 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1137 tag = av_dict_get(st->metadata, "language", NULL, 0);
1138 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1139 tag && tag->value ? tag->value : "und");
1141 // The default value for TRACKFLAGDEFAULT is 1, so add element
1142 // if we need to clear it.
1143 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1144 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1146 if (st->disposition & AV_DISPOSITION_FORCED)
1147 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1149 if (mkv->mode == MODE_WEBM) {
1150 const char *codec_id;
1151 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1152 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1153 if (ff_webm_codec_tags[j].id == par->codec_id) {
1154 codec_id = ff_webm_codec_tags[j].str;
1159 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1160 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1161 codec_id = "D_WEBVTT/CAPTIONS";
1162 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1163 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1164 codec_id = "D_WEBVTT/DESCRIPTIONS";
1165 native_id = MATROSKA_TRACK_TYPE_METADATA;
1166 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1167 codec_id = "D_WEBVTT/METADATA";
1168 native_id = MATROSKA_TRACK_TYPE_METADATA;
1170 codec_id = "D_WEBVTT/SUBTITLES";
1171 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1176 av_log(s, AV_LOG_ERROR,
1177 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1178 return AVERROR(EINVAL);
1181 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1183 // look for a codec ID string specific to mkv to use,
1184 // if none are found, use AVI codes
1185 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1186 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1187 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1188 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1194 if (mkv->allow_raw_vfw) {
1197 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1198 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1199 return AVERROR(EINVAL);
1204 switch (par->codec_type) {
1205 case AVMEDIA_TYPE_VIDEO:
1206 mkv->have_video = 1;
1207 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1209 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1210 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1211 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1212 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1213 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1214 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1217 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1218 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1219 par->codec_id == AV_CODEC_ID_SVQ1 ||
1220 par->codec_id == AV_CODEC_ID_SVQ3 ||
1221 par->codec_id == AV_CODEC_ID_CINEPAK))
1225 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1226 else if (!native_id) {
1227 // if there is no mkv-specific codec ID, use VFW mode
1228 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1229 track->write_dts = 1;
1230 s->internal->avoid_negative_ts_use_pts = 0;
1233 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1235 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1236 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1238 mkv_write_field_order(pb, mkv->mode, par->field_order);
1240 // check both side data and metadata for stereo information,
1241 // write the result to the bitstream if any is found
1242 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1244 &display_height_div);
1248 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1249 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1250 (par->format == AV_PIX_FMT_YUVA420P)) {
1251 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1254 // write DisplayWidth and DisplayHeight, they contain the size of
1255 // a single source view and/or the display aspect ratio
1256 if (st->sample_aspect_ratio.num) {
1257 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1258 if (d_width > INT_MAX) {
1259 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1260 return AVERROR(EINVAL);
1262 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1263 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1264 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1265 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1267 AVRational display_aspect_ratio;
1268 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1269 par->width * (int64_t)st->sample_aspect_ratio.num,
1270 par->height * (int64_t)st->sample_aspect_ratio.den,
1272 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1273 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1274 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1277 } else if (display_width_div != 1 || display_height_div != 1) {
1278 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1279 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1280 } else if (mkv->mode != MODE_WEBM)
1281 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1283 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1284 uint32_t color_space = av_le2ne32(par->codec_tag);
1285 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1287 ret = mkv_write_video_color(pb, par, st);
1290 ret = mkv_write_video_projection(s, pb, st);
1293 end_ebml_master(pb, subinfo);
1296 case AVMEDIA_TYPE_AUDIO:
1297 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1298 int64_t codecdelay = av_rescale_q(par->initial_padding,
1299 (AVRational){ 1, 48000 },
1300 (AVRational){ 1, 1000000000 });
1301 if (codecdelay < 0) {
1302 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1303 return AVERROR(EINVAL);
1305 // track->ts_offset = av_rescale_q(par->initial_padding,
1306 // (AVRational){ 1, par->sample_rate },
1309 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1311 if (par->codec_id == AV_CODEC_ID_OPUS)
1312 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1314 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1317 // no mkv-specific ID, use ACM mode
1318 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1320 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1321 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1323 track->sample_rate_offset = avio_tell(pb);
1324 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1325 if (output_sample_rate)
1326 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1328 bit_depth = av_get_bits_per_sample(par->codec_id);
1329 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1330 if (par->bits_per_raw_sample)
1331 bit_depth = par->bits_per_raw_sample;
1333 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1336 bit_depth = par->bits_per_coded_sample;
1338 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1339 end_ebml_master(pb, subinfo);
1342 case AVMEDIA_TYPE_SUBTITLE:
1344 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1345 return AVERROR(ENOSYS);
1348 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1349 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1351 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1354 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1355 return AVERROR(EINVAL);
1358 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1359 track->codecpriv_offset = avio_tell(pb);
1360 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1365 end_ebml_master(pb, track_master);
1370 static int mkv_write_tracks(AVFormatContext *s)
1372 MatroskaMuxContext *mkv = s->priv_data;
1373 AVIOContext *pb = s->pb;
1374 int i, ret, default_stream_exists = 0;
1376 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TRACKS, avio_tell(pb));
1378 ret = start_ebml_master_crc32(&mkv->tracks_bc, mkv);
1382 for (i = 0; i < s->nb_streams; i++) {
1383 AVStream *st = s->streams[i];
1384 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1386 for (i = 0; i < s->nb_streams; i++) {
1387 AVStream *st = s->streams[i];
1388 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1389 mkv->tracks_bc, default_stream_exists);
1394 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1395 end_ebml_master_crc32_preliminary(pb, mkv->tracks_bc,
1396 MATROSKA_ID_TRACKS, &mkv->tracks_pos);
1398 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
1403 static int mkv_write_chapters(AVFormatContext *s)
1405 MatroskaMuxContext *mkv = s->priv_data;
1406 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1407 ebml_master editionentry;
1408 AVRational scale = {1, 1E9};
1411 if (!s->nb_chapters || mkv->wrote_chapters)
1414 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1416 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1417 if (ret < 0) return ret;
1419 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1420 if (mkv->mode != MODE_WEBM) {
1421 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1423 for (i = 0; i < s->nb_chapters; i++) {
1424 ebml_master chapteratom, chapterdisplay;
1425 AVChapter *c = s->chapters[i];
1426 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1427 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1428 AVDictionaryEntry *t = NULL;
1429 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1430 av_log(s, AV_LOG_ERROR,
1431 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1432 chapterstart, chapterend);
1433 return AVERROR_INVALIDDATA;
1436 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1437 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1438 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1439 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1440 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1441 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1442 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1443 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1444 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1445 end_ebml_master(dyn_cp, chapterdisplay);
1447 end_ebml_master(dyn_cp, chapteratom);
1449 end_ebml_master(dyn_cp, editionentry);
1450 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0);
1452 mkv->wrote_chapters = 1;
1456 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1458 uint8_t *key = av_strdup(t->key);
1460 const uint8_t *lang = NULL;
1464 return AVERROR(ENOMEM);
1466 if ((p = strrchr(p, '-')) &&
1467 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1474 else if (*p >= 'a' && *p <= 'z')
1479 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1480 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1482 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1483 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1484 end_ebml_master(pb, tag);
1490 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1491 uint64_t uid, ebml_master *tag)
1494 MatroskaMuxContext *mkv = s->priv_data;
1495 ebml_master targets;
1498 if (!mkv->tags_bc) {
1499 mkv_add_seekhead_entry(mkv, MATROSKA_ID_TAGS, avio_tell(s->pb));
1501 ret = start_ebml_master_crc32(&mkv->tags_bc, mkv);
1507 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1508 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1510 put_ebml_uid(pb, elementid, uid);
1511 end_ebml_master(pb, targets);
1515 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1517 return av_strcasecmp(name, "title") &&
1518 av_strcasecmp(name, "stereo_mode") &&
1519 av_strcasecmp(name, "creation_time") &&
1520 av_strcasecmp(name, "encoding_tool") &&
1521 av_strcasecmp(name, "duration") &&
1522 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1523 av_strcasecmp(name, "language")) &&
1524 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1525 (av_strcasecmp(name, "filename") &&
1526 av_strcasecmp(name, "mimetype")));
1529 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1530 uint64_t uid, ebml_master *tag)
1532 MatroskaMuxContext *mkv = s->priv_data;
1535 AVDictionaryEntry *t = NULL;
1537 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1541 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1542 if (mkv_check_tag_name(t->key, elementid)) {
1543 ret = mkv_write_simpletag(mkv->tags_bc, t);
1550 end_ebml_master(mkv->tags_bc, tag2);
1555 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1557 AVDictionaryEntry *t = NULL;
1559 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1560 if (mkv_check_tag_name(t->key, elementid))
1566 static int mkv_write_tags(AVFormatContext *s)
1568 MatroskaMuxContext *mkv = s->priv_data;
1569 ebml_master tag, *tagp;
1572 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1574 if (mkv_check_tag(s->metadata, 0)) {
1575 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1576 if (ret < 0) return ret;
1579 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1580 for (i = 0; i < s->nb_streams; i++) {
1581 AVStream *st = s->streams[i];
1582 mkv_track *track = &mkv->tracks[i];
1584 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1587 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1590 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1592 if (ret < 0) return ret;
1595 AVIOContext *pb = mkv->tags_bc;
1596 ebml_master simpletag;
1598 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1599 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1600 mkv->tracks[i].duration_offset = avio_tell(pb);
1602 // Reserve space to write duration as a 20-byte string.
1603 // 2 (ebml id) + 1 (data size) + 20 (data)
1604 put_ebml_void(pb, 23);
1605 end_ebml_master(pb, simpletag);
1606 end_ebml_master(pb, tag);
1610 if (mkv->mode != MODE_WEBM) {
1611 for (i = 0; i < s->nb_chapters; i++) {
1612 AVChapter *ch = s->chapters[i];
1614 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1617 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1618 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1625 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1626 for (i = 0; i < s->nb_streams; i++) {
1627 mkv_track *track = &mkv->tracks[i];
1628 AVStream *st = s->streams[i];
1630 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1633 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1636 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1644 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1645 end_ebml_master_crc32_preliminary(s->pb, mkv->tags_bc,
1646 MATROSKA_ID_TAGS, &mkv->tags_pos);
1648 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
1653 static int mkv_write_attachments(AVFormatContext *s)
1655 MatroskaMuxContext *mkv = s->priv_data;
1656 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1659 if (!mkv->have_attachments)
1662 mkv_add_seekhead_entry(mkv, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1664 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1665 if (ret < 0) return ret;
1667 for (i = 0; i < s->nb_streams; i++) {
1668 AVStream *st = s->streams[i];
1669 mkv_track *track = &mkv->tracks[i];
1670 ebml_master attached_file;
1671 AVDictionaryEntry *t;
1672 const char *mimetype = NULL;
1674 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1677 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1679 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1680 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1681 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1682 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1683 return AVERROR(EINVAL);
1685 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1686 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1687 mimetype = t->value;
1688 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1689 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1690 if (desc && desc->mime_types) {
1691 mimetype = desc->mime_types[0];
1692 } else if (st->codecpar->codec_id = AV_CODEC_ID_TEXT)
1693 mimetype = "text/plain";
1696 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1697 "it cannot be deduced from the codec id.\n", i);
1698 return AVERROR(EINVAL);
1701 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1702 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1703 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1704 end_ebml_master(dyn_cp, attached_file);
1706 end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS, 0, 0);
1711 static int64_t get_metadata_duration(AVFormatContext *s)
1717 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1718 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1719 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1723 for (i = 0; i < s->nb_streams; i++) {
1725 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1727 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1728 max = FFMAX(max, us);
1731 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1735 static int mkv_write_header(AVFormatContext *s)
1737 MatroskaMuxContext *mkv = s->priv_data;
1738 AVIOContext *pb = s->pb;
1739 ebml_master ebml_header;
1740 AVDictionaryEntry *tag;
1741 int ret, i, version = 2;
1742 int64_t creation_time;
1744 if (!strcmp(s->oformat->name, "webm")) {
1745 mkv->mode = MODE_WEBM;
1748 mkv->mode = MODE_MATROSKAv2;
1750 if (mkv->mode != MODE_WEBM ||
1751 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1752 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1755 for (i = 0; i < s->nb_streams; i++) {
1756 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1757 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1758 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1762 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1763 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1764 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1765 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1766 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1767 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1768 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1769 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1770 end_ebml_master(pb, ebml_header);
1772 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1773 mkv->segment_offset = avio_tell(pb);
1775 // we write a seek head at the beginning to point to all other level
1776 // one elements (except Clusters).
1777 mkv_start_seekhead(mkv, pb);
1779 mkv_add_seekhead_entry(mkv, MATROSKA_ID_INFO, avio_tell(pb));
1781 ret = start_ebml_master_crc32(&mkv->info_bc, mkv);
1786 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1787 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1788 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1789 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1790 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1791 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1792 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1794 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1796 if (mkv->mode != MODE_WEBM) {
1797 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1800 const char *ident = "Lavf";
1801 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1802 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1805 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1806 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1807 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1808 uint8_t date_utc_buf[8];
1809 AV_WB64(date_utc_buf, date_utc);
1810 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1813 // reserve space for the duration
1815 mkv->duration_offset = avio_tell(pb);
1816 if (!mkv->is_live) {
1817 int64_t metadata_duration = get_metadata_duration(s);
1819 if (s->duration > 0) {
1820 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1821 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1822 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1823 } else if (metadata_duration > 0) {
1824 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1825 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1826 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1828 put_ebml_void(pb, 11); // assumes double-precision float to be written
1831 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1832 end_ebml_master_crc32_preliminary(s->pb, mkv->info_bc,
1833 MATROSKA_ID_INFO, &mkv->info_pos);
1835 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
1838 ret = mkv_write_tracks(s);
1842 for (i = 0; i < s->nb_chapters; i++)
1843 if (!s->chapters[i]->id) {
1844 mkv->chapter_id_offset = 1;
1848 ret = mkv_write_chapters(s);
1852 if (mkv->mode != MODE_WEBM) {
1853 ret = mkv_write_attachments(s);
1858 ret = mkv_write_tags(s);
1862 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1863 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1868 if (s->metadata_header_padding > 0) {
1869 if (s->metadata_header_padding == 1)
1870 s->metadata_header_padding++;
1871 put_ebml_void(pb, s->metadata_header_padding);
1874 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1875 mkv->cues_pos = avio_tell(pb);
1876 if (mkv->reserve_cues_space == 1)
1877 mkv->reserve_cues_space++;
1878 put_ebml_void(pb, mkv->reserve_cues_space);
1881 av_init_packet(&mkv->cur_audio_pkt);
1882 mkv->cur_audio_pkt.size = 0;
1883 mkv->cluster_pos = -1;
1885 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1886 // after 4k and on a keyframe
1887 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1888 if (mkv->cluster_time_limit < 0)
1889 mkv->cluster_time_limit = 5000;
1890 if (mkv->cluster_size_limit < 0)
1891 mkv->cluster_size_limit = 5 * 1024 * 1024;
1893 if (mkv->cluster_time_limit < 0)
1894 mkv->cluster_time_limit = 1000;
1895 if (mkv->cluster_size_limit < 0)
1896 mkv->cluster_size_limit = 32 * 1024;
1902 static int mkv_blockgroup_size(int pkt_size)
1904 int size = pkt_size + 4;
1905 size += ebml_length_size(size);
1906 size += 2; // EBML ID for block and block duration
1907 size += 9; // max size of block duration incl. length field
1911 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1918 dst = av_malloc(srclen);
1920 return AVERROR(ENOMEM);
1922 while (srclen >= WV_HEADER_SIZE) {
1925 ret = ff_wv_parse_header(&header, src);
1928 src += WV_HEADER_SIZE;
1929 srclen -= WV_HEADER_SIZE;
1931 if (srclen < header.blocksize) {
1932 ret = AVERROR_INVALIDDATA;
1936 if (header.initial) {
1937 AV_WL32(dst + offset, header.samples);
1940 AV_WL32(dst + offset, header.flags);
1941 AV_WL32(dst + offset + 4, header.crc);
1944 if (!(header.initial && header.final)) {
1945 AV_WL32(dst + offset, header.blocksize);
1949 memcpy(dst + offset, src, header.blocksize);
1950 src += header.blocksize;
1951 srclen -= header.blocksize;
1952 offset += header.blocksize;
1964 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1965 uint32_t blockid, AVPacket *pkt, int keyframe)
1967 MatroskaMuxContext *mkv = s->priv_data;
1968 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1969 mkv_track *track = &mkv->tracks[pkt->stream_index];
1970 uint8_t *data = NULL, *side_data = NULL;
1971 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
1972 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
1973 uint64_t additional_id;
1974 int64_t discard_padding = 0;
1975 unsigned track_number = track->track_num;
1976 ebml_master block_group, block_additions, block_more;
1978 ts += track->ts_offset;
1980 /* The following string is identical to the one in mkv_write_vtt_blocks
1981 * so that only one copy needs to exist in binaries. */
1982 av_log(s, AV_LOG_DEBUG,
1983 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
1984 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
1985 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
1986 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
1987 mkv->cluster_pos, track_number, keyframe != 0);
1989 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1990 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1991 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1992 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1993 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
1994 /* extradata is Annex B, assume the bitstream is too and convert it */
1995 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1996 } else if (par->codec_id == AV_CODEC_ID_AV1) {
1997 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
1998 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1999 err = mkv_strip_wavpack(pkt->data, &data, &size);
2004 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2005 "a packet from stream %d.\n", pkt->stream_index);
2009 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2010 /* Matroska specification requires to remove the first QuickTime atom
2016 side_data = av_packet_get_side_data(pkt,
2017 AV_PKT_DATA_SKIP_SAMPLES,
2019 if (side_data && side_data_size >= 10) {
2020 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2021 (AVRational){1, par->sample_rate},
2022 (AVRational){1, 1000000000});
2025 side_data = av_packet_get_side_data(pkt,
2026 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2029 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2030 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2034 side_data_size -= 8;
2038 if (side_data_size || discard_padding) {
2039 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2040 blockid = MATROSKA_ID_BLOCK;
2043 put_ebml_id(pb, blockid);
2044 put_ebml_length(pb, size + 4, 0);
2045 // this assumes stream_index is less than 126
2046 avio_w8(pb, 0x80 | track_number);
2047 avio_wb16(pb, ts - mkv->cluster_pts);
2048 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2049 avio_write(pb, data + offset, size);
2050 if (data != pkt->data)
2053 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2054 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2056 track->last_timestamp = ts;
2058 if (discard_padding) {
2059 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2062 if (side_data_size) {
2063 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2064 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2065 /* Until dbc50f8a our demuxer used a wrong default value
2066 * of BlockAddID, so we write it unconditionally. */
2067 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2068 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2069 side_data, side_data_size);
2070 end_ebml_master(pb, block_more);
2071 end_ebml_master(pb, block_additions);
2073 if (side_data_size || discard_padding) {
2074 end_ebml_master(pb, block_group);
2080 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2082 MatroskaMuxContext *mkv = s->priv_data;
2083 mkv_track *track = &mkv->tracks[pkt->stream_index];
2084 ebml_master blockgroup;
2085 int id_size, settings_size, size;
2086 uint8_t *id, *settings;
2087 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2088 const int flags = 0;
2091 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2095 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2098 size = id_size + 1 + settings_size + 1 + pkt->size;
2100 /* The following string is identical to the one in mkv_write_block so that
2101 * only one copy needs to exist in binaries. */
2102 av_log(s, AV_LOG_DEBUG,
2103 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2104 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2105 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2106 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2107 mkv->cluster_pos, track->track_num, 1);
2109 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2111 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2112 put_ebml_length(pb, size + 4, 0);
2113 avio_w8(pb, 0x80 | track->track_num); // this assumes track_num is less than 126
2114 avio_wb16(pb, ts - mkv->cluster_pts);
2116 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2118 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2119 end_ebml_master(pb, blockgroup);
2121 return pkt->duration;
2124 static void mkv_end_cluster(AVFormatContext *s)
2126 MatroskaMuxContext *mkv = s->priv_data;
2128 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
2129 mkv->cluster_pos = -1;
2130 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2133 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2135 MatroskaMuxContext *mkv = s->priv_data;
2136 mkv_track *track = &mkv->tracks[pkt->stream_index];
2137 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2139 int side_data_size = 0, ret;
2141 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2144 switch (par->codec_id) {
2145 case AV_CODEC_ID_AAC:
2146 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2147 int filler, output_sample_rate = 0;
2148 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2149 &output_sample_rate);
2152 if (!output_sample_rate)
2153 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2154 ret = ff_alloc_extradata(par, side_data_size);
2157 memcpy(par->extradata, side_data, side_data_size);
2158 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2159 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2160 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2162 put_ebml_void(mkv->tracks_bc, filler);
2163 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2164 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2165 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2166 } else if (!par->extradata_size && !track->sample_rate) {
2167 // No extradata (codecpar or packet side data).
2168 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2169 return AVERROR(EINVAL);
2172 case AV_CODEC_ID_FLAC:
2173 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2174 AVCodecParameters *codecpriv_par;
2175 if (side_data_size != par->extradata_size) {
2176 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2178 return AVERROR(EINVAL);
2180 codecpriv_par = avcodec_parameters_alloc();
2182 return AVERROR(ENOMEM);
2183 ret = avcodec_parameters_copy(codecpriv_par, par);
2185 avcodec_parameters_free(&codecpriv_par);
2188 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2189 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2190 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2191 avcodec_parameters_free(&codecpriv_par);
2194 // FIXME: Remove the following once libaom starts propagating extradata during init()
2195 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2196 case AV_CODEC_ID_AV1:
2197 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2198 !par->extradata_size) {
2199 AVIOContext *dyn_cp;
2202 ret = avio_open_dyn_buf(&dyn_cp);
2205 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2206 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2207 if (!codecpriv_size) {
2209 return AVERROR_INVALIDDATA;
2211 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2212 // Do not write the OBUs as we don't have space saved for them
2213 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2215 ret = ff_alloc_extradata(par, side_data_size);
2218 memcpy(par->extradata, side_data, side_data_size);
2219 } else if (!par->extradata_size)
2220 return AVERROR_INVALIDDATA;
2224 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2231 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2233 MatroskaMuxContext *mkv = s->priv_data;
2235 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2236 mkv_track *track = &mkv->tracks[pkt->stream_index];
2237 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2238 int duration = pkt->duration;
2240 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2241 int64_t relative_packet_pos;
2243 if (ts == AV_NOPTS_VALUE) {
2244 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2245 return AVERROR(EINVAL);
2247 ts += track->ts_offset;
2249 if (mkv->cluster_pos != -1) {
2250 int64_t cluster_time = ts - mkv->cluster_pts;
2251 if ((int16_t)cluster_time != cluster_time) {
2253 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2257 if (mkv->cluster_pos == -1) {
2258 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2261 mkv->cluster_pos = avio_tell(s->pb);
2262 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2263 mkv->cluster_pts = FFMAX(0, ts);
2264 av_log(s, AV_LOG_DEBUG,
2265 "Starting new cluster with timestamp "
2266 "%" PRId64 " at offset %" PRId64 " bytes\n",
2267 mkv->cluster_pts, mkv->cluster_pos);
2269 pb = mkv->cluster_bc;
2271 relative_packet_pos = avio_tell(pb);
2273 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2274 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2277 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2278 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2279 mkv->cluster_pos, relative_packet_pos, -1);
2280 if (ret < 0) return ret;
2283 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2284 duration = mkv_write_vtt_blocks(s, pb, pkt);
2286 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2287 mkv_blockgroup_size(pkt->size));
2289 #if FF_API_CONVERGENCE_DURATION
2290 FF_DISABLE_DEPRECATION_WARNINGS
2291 /* For backward compatibility, prefer convergence_duration. */
2292 if (pkt->convergence_duration > 0) {
2293 duration = pkt->convergence_duration;
2295 FF_ENABLE_DEPRECATION_WARNINGS
2297 /* All subtitle blocks are considered to be keyframes. */
2298 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2299 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2300 end_ebml_master(pb, blockgroup);
2303 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2304 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2305 mkv->cluster_pos, relative_packet_pos, duration);
2311 mkv->duration = FFMAX(mkv->duration, ts + duration);
2312 track->duration = FFMAX(track->duration, ts + duration);
2317 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2319 MatroskaMuxContext *mkv = s->priv_data;
2320 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2321 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2323 int64_t cluster_time;
2325 int start_new_cluster;
2327 ret = mkv_check_new_extra_data(s, pkt);
2331 if (mkv->tracks[pkt->stream_index].write_dts)
2332 cluster_time = pkt->dts - mkv->cluster_pts;
2334 cluster_time = pkt->pts - mkv->cluster_pts;
2335 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2337 cluster_size = avio_tell(mkv->cluster_bc);
2339 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2340 // WebM DASH specification states that the first block of every cluster
2341 // has to be a key frame. So for DASH video, we only create a cluster
2342 // on seeing key frames.
2343 start_new_cluster = keyframe;
2344 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2345 (mkv->cluster_pos == -1 ||
2346 cluster_time > mkv->cluster_time_limit)) {
2347 // For DASH audio, we create a Cluster based on cluster_time_limit
2348 start_new_cluster = 1;
2349 } else if (!mkv->is_dash &&
2350 (cluster_size > mkv->cluster_size_limit ||
2351 cluster_time > mkv->cluster_time_limit ||
2352 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2353 cluster_size > 4 * 1024))) {
2354 start_new_cluster = 1;
2356 start_new_cluster = 0;
2359 if (mkv->cluster_pos != -1 && start_new_cluster) {
2363 if (!mkv->cluster_pos)
2364 avio_write_marker(s->pb,
2365 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2366 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2368 // check if we have an audio packet cached
2369 if (mkv->cur_audio_pkt.size > 0) {
2370 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2371 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2372 mkv->is_dash ? start_new_cluster : 0);
2373 av_packet_unref(&mkv->cur_audio_pkt);
2375 av_log(s, AV_LOG_ERROR,
2376 "Could not write cached audio packet ret:%d\n", ret);
2381 // buffer an audio packet to ensure the packet containing the video
2382 // keyframe's timecode is contained in the same cluster for WebM
2383 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2385 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2387 ret = mkv_write_packet_internal(s, pkt, 0);
2391 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2393 MatroskaMuxContext *mkv = s->priv_data;
2396 if (mkv->cluster_pos != -1) {
2398 av_log(s, AV_LOG_DEBUG,
2399 "Flushing cluster at offset %" PRIu64 " bytes\n",
2404 return mkv_write_packet(s, pkt);
2407 static int mkv_write_trailer(AVFormatContext *s)
2409 MatroskaMuxContext *mkv = s->priv_data;
2410 AVIOContext *pb = s->pb;
2413 // check if we have an audio packet cached
2414 if (mkv->cur_audio_pkt.size > 0) {
2415 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2417 av_log(s, AV_LOG_ERROR,
2418 "Could not write cached audio packet ret:%d\n", ret);
2423 if (mkv->cluster_bc) {
2424 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2425 MATROSKA_ID_CLUSTER, 0, 0);
2428 ret = mkv_write_chapters(s);
2433 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2434 int64_t endpos, ret64;
2436 endpos = avio_tell(pb);
2438 if (mkv->cues.num_entries) {
2439 AVIOContext *cues = NULL;
2441 int64_t cuespos = endpos;
2442 int length_size = 0;
2444 ret = start_ebml_master_crc32(&cues, mkv);
2448 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2449 mkv->tracks, s->nb_streams);
2451 ffio_free_dyn_buf(&cues);
2455 if (mkv->reserve_cues_space) {
2456 size = avio_tell(cues);
2457 length_size = ebml_length_size(size);
2458 size += 4 + length_size;
2459 if (mkv->reserve_cues_space < size) {
2460 av_log(s, AV_LOG_WARNING,
2461 "Insufficient space reserved for Cues: "
2462 "%d < %"PRIu64". No Cues will be output.\n",
2463 mkv->reserve_cues_space, size);
2464 mkv->reserve_cues_space = -1;
2465 ffio_free_dyn_buf(&cues);
2468 cuespos = mkv->cues_pos;
2469 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2470 ffio_free_dyn_buf(&cues);
2473 if (mkv->reserve_cues_space == size + 1) {
2474 /* There is no way to reserve a single byte because
2475 * the minimal size of an EBML Void element is 2
2476 * (1 byte ID, 1 byte length field). This problem
2477 * is solved by writing the Cues' length field on
2478 * one byte more than necessary. */
2484 mkv_add_seekhead_entry(mkv, MATROSKA_ID_CUES, cuespos);
2485 end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2487 if (mkv->reserve_cues_space) {
2488 if (size < mkv->reserve_cues_space)
2489 put_ebml_void(pb, mkv->reserve_cues_space - size);
2491 endpos = avio_tell(pb);
2495 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info_pos);
2499 // update the duration
2500 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2501 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2502 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2503 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO, 0, 0);
2505 // write tracks master
2506 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2507 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS, 0, 0);
2509 // update stream durations
2512 for (i = 0; i < s->nb_streams; ++i) {
2513 AVStream *st = s->streams[i];
2514 mkv_track *track = &mkv->tracks[i];
2516 if (track->duration_offset > 0) {
2517 double duration_sec = track->duration * av_q2d(st->time_base);
2518 char duration_string[20] = "";
2520 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2523 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2525 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2526 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2527 fmod(duration_sec, 60));
2529 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2533 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2534 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS, 0, 0);
2537 avio_seek(pb, endpos, SEEK_SET);
2540 if (!mkv->is_live) {
2541 end_ebml_master(pb, mkv->segment);
2544 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2547 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2550 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2551 if (ff_mkv_codec_tags[i].id == codec_id)
2554 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2555 enum AVMediaType type = avcodec_get_type(codec_id);
2556 // mkv theoretically supports any video/audio through VFW/ACM
2557 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2564 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2567 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2568 if (ff_webm_codec_tags[i].id == codec_id)
2574 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2579 uid = (uint64_t)av_lfg_get(c) << 32;
2580 uid |= av_lfg_get(c);
2583 for (k = 0; k < i; k++) {
2584 if (tracks[k].uid == uid)
2592 static int mkv_init(struct AVFormatContext *s)
2594 MatroskaMuxContext *mkv = s->priv_data;
2596 unsigned nb_tracks = 0;
2599 for (i = 0; i < s->nb_streams; i++) {
2600 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2601 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2602 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2603 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2604 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2605 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2606 av_log(s, AV_LOG_ERROR,
2607 "The Matroska muxer does not yet support muxing %s\n",
2608 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2609 return AVERROR_PATCHWELCOME;
2613 if (s->avoid_negative_ts < 0) {
2614 s->avoid_negative_ts = 1;
2615 s->internal->avoid_negative_ts_use_pts = 1;
2618 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2620 return AVERROR(ENOMEM);
2623 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2624 av_lfg_init(&c, av_get_random_seed());
2626 // Calculate the SegmentUID now in order not to waste our random seed.
2627 for (i = 0; i < 4; i++)
2628 mkv->segment_uid[i] = av_lfg_get(&c);
2631 for (i = 0; i < s->nb_streams; i++) {
2632 AVStream *st = s->streams[i];
2633 mkv_track *track = &mkv->tracks[i];
2635 if (s->flags & AVFMT_FLAG_BITEXACT) {
2638 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2641 // ms precision is the de-facto standard timescale for mkv files
2642 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2644 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
2648 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2651 if (nb_tracks > MAX_TRACKS) {
2652 av_log(s, AV_LOG_ERROR,
2653 "%u > "AV_STRINGIFY(MAX_TRACKS)" tracks (excluding attachments)"
2654 " not supported for muxing in Matroska\n", nb_tracks);
2655 return AVERROR(EINVAL);
2661 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2664 AVStream *st = s->streams[pkt->stream_index];
2666 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2667 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2668 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2669 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2670 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2676 static const AVCodecTag additional_audio_tags[] = {
2677 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2678 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2679 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2680 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2681 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2682 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2683 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2684 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2685 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2686 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2687 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2688 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2689 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2692 static const AVCodecTag additional_video_tags[] = {
2693 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2694 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2695 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2696 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2699 static const AVCodecTag additional_subtitle_tags[] = {
2700 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2701 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2702 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2703 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2706 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2707 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2708 static const AVOption options[] = {
2709 { "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 },
2710 { "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 },
2711 { "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 },
2712 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2713 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2714 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2715 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2716 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2720 #if CONFIG_MATROSKA_MUXER
2721 static const AVClass matroska_class = {
2722 .class_name = "matroska muxer",
2723 .item_name = av_default_item_name,
2725 .version = LIBAVUTIL_VERSION_INT,
2728 AVOutputFormat ff_matroska_muxer = {
2730 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2731 .mime_type = "video/x-matroska",
2732 .extensions = "mkv",
2733 .priv_data_size = sizeof(MatroskaMuxContext),
2734 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2735 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2736 .video_codec = CONFIG_LIBX264_ENCODER ?
2737 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2739 .deinit = mkv_deinit,
2740 .write_header = mkv_write_header,
2741 .write_packet = mkv_write_flush_packet,
2742 .write_trailer = mkv_write_trailer,
2743 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2744 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2745 .codec_tag = (const AVCodecTag* const []){
2746 ff_codec_bmp_tags, ff_codec_wav_tags,
2747 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2749 .subtitle_codec = AV_CODEC_ID_ASS,
2750 .query_codec = mkv_query_codec,
2751 .check_bitstream = mkv_check_bitstream,
2752 .priv_class = &matroska_class,
2756 #if CONFIG_WEBM_MUXER
2757 static const AVClass webm_class = {
2758 .class_name = "webm muxer",
2759 .item_name = av_default_item_name,
2761 .version = LIBAVUTIL_VERSION_INT,
2764 AVOutputFormat ff_webm_muxer = {
2766 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2767 .mime_type = "video/webm",
2768 .extensions = "webm",
2769 .priv_data_size = sizeof(MatroskaMuxContext),
2770 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2771 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2772 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2774 .deinit = mkv_deinit,
2775 .write_header = mkv_write_header,
2776 .write_packet = mkv_write_flush_packet,
2777 .write_trailer = mkv_write_trailer,
2778 .query_codec = webm_query_codec,
2779 .check_bitstream = mkv_check_bitstream,
2780 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2781 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2782 .priv_class = &webm_class,
2786 #if CONFIG_MATROSKA_AUDIO_MUXER
2787 static const AVClass mka_class = {
2788 .class_name = "matroska audio muxer",
2789 .item_name = av_default_item_name,
2791 .version = LIBAVUTIL_VERSION_INT,
2793 AVOutputFormat ff_matroska_audio_muxer = {
2795 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2796 .mime_type = "audio/x-matroska",
2797 .extensions = "mka",
2798 .priv_data_size = sizeof(MatroskaMuxContext),
2799 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2800 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2801 .video_codec = AV_CODEC_ID_NONE,
2803 .deinit = mkv_deinit,
2804 .write_header = mkv_write_header,
2805 .write_packet = mkv_write_flush_packet,
2806 .write_trailer = mkv_write_trailer,
2807 .check_bitstream = mkv_check_bitstream,
2808 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2810 .codec_tag = (const AVCodecTag* const []){
2811 ff_codec_wav_tags, additional_audio_tags, 0
2813 .priv_class = &mka_class,