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 (potentially twice) and Cues */
59 #define MAX_SEEKHEAD_ENTRIES 7
61 #define IS_SEEKABLE(pb, mkv) (((pb)->seekable & AVIO_SEEKABLE_NORMAL) && \
66 DEFAULT_MODE_INFER_NO_SUBS,
67 DEFAULT_MODE_PASSTHROUGH,
70 typedef struct ebml_master {
71 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
72 int sizebytes; ///< how many bytes were reserved for the size
75 typedef struct ebml_stored_master {
80 typedef struct mkv_seekhead_entry {
85 typedef struct mkv_seekhead {
87 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
92 typedef struct mkv_cuepoint {
95 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
96 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
97 int64_t duration; ///< duration of the block according to time base
100 typedef struct mkv_cues {
101 mkv_cuepoint *entries;
105 typedef struct mkv_track {
112 int64_t sample_rate_offset;
113 int64_t last_timestamp;
115 int64_t duration_offset;
116 int64_t codecpriv_offset;
120 #define MODE_MATROSKAv2 0x01
121 #define MODE_WEBM 0x02
123 typedef struct MatroskaMuxContext {
124 const AVClass *class;
126 ebml_stored_master info;
127 ebml_stored_master track;
128 ebml_stored_master tags;
129 int64_t segment_offset;
130 AVIOContext *cluster_bc;
131 int64_t cluster_pos; ///< file offset of the current Cluster
133 int64_t duration_offset;
136 mkv_seekhead seekhead;
140 AVPacket cur_audio_pkt;
142 unsigned nb_attachments;
148 int reserve_cues_space;
149 int cluster_size_limit;
150 int64_t cluster_time_limit;
155 int dash_track_number;
159 uint32_t segment_uid[4];
160 } MatroskaMuxContext;
162 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
163 * 8 byte for "matroska" doctype string */
164 #define MAX_EBML_HEADER_SIZE 35
166 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
167 * offset, 4 bytes for target EBML ID */
168 #define MAX_SEEKENTRY_SIZE 21
170 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
171 #define MAX_CUETRACKPOS_SIZE 40
173 /** Seek preroll value for opus */
174 #define OPUS_SEEK_PREROLL 80000000
176 static int ebml_id_size(uint32_t id)
178 return (av_log2(id) + 7U) / 8;
181 static void put_ebml_id(AVIOContext *pb, uint32_t id)
183 int i = ebml_id_size(id);
185 avio_w8(pb, (uint8_t)(id >> (i * 8)));
189 * Write an EBML size meaning "unknown size".
191 * @param bytes The number of bytes the size should occupy (maximum: 8).
193 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
195 av_assert0(bytes <= 8);
196 avio_w8(pb, 0x1ff >> bytes);
197 ffio_fill(pb, 0xff, bytes - 1);
201 * Returns how many bytes are needed to represent a number
202 * as EBML variable length integer.
204 static int ebml_num_size(uint64_t num)
214 * Calculate how many bytes are needed to represent the length field
215 * of an EBML element whose payload has a given length.
217 static int ebml_length_size(uint64_t length)
219 return ebml_num_size(length + 1);
223 * Write a number as EBML variable length integer on `bytes` bytes.
224 * `bytes` is taken literally without checking.
226 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
228 num |= 1ULL << bytes * 7;
229 for (int i = bytes - 1; i >= 0; i--)
230 avio_w8(pb, (uint8_t)(num >> i * 8));
234 * Write a length as EBML variable length integer.
236 * @param bytes The number of bytes that need to be used to write the number.
237 * If zero, the minimal number of bytes will be used.
239 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
241 int needed_bytes = ebml_length_size(length);
243 // sizes larger than this are currently undefined in EBML
244 av_assert0(length < (1ULL << 56) - 1);
247 bytes = needed_bytes;
248 // The bytes needed to write the given size must not exceed
249 // the bytes that we ought to use.
250 av_assert0(bytes >= needed_bytes);
251 put_ebml_num(pb, length, bytes);
255 * Write a (random) UID with fixed size to make the output more deterministic
257 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
259 put_ebml_id(pb, elementid);
260 put_ebml_length(pb, 8, 0);
264 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
271 put_ebml_id(pb, elementid);
272 put_ebml_length(pb, bytes, 0);
273 for (i = bytes - 1; i >= 0; i--)
274 avio_w8(pb, (uint8_t)(val >> i * 8));
277 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
280 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
285 put_ebml_id(pb, elementid);
286 put_ebml_length(pb, bytes, 0);
287 for (i = bytes - 1; i >= 0; i--)
288 avio_w8(pb, (uint8_t)(val >> i * 8));
291 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
293 put_ebml_id(pb, elementid);
294 put_ebml_length(pb, 8, 0);
295 avio_wb64(pb, av_double2int(val));
298 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
299 const void *buf, int size)
301 put_ebml_id(pb, elementid);
302 put_ebml_length(pb, size, 0);
303 avio_write(pb, buf, size);
306 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
309 put_ebml_binary(pb, elementid, str, strlen(str));
313 * Write a void element of a given size. Useful for reserving space in
314 * the file to be written to later.
316 * @param size The number of bytes to reserve, which must be at least 2.
318 static void put_ebml_void(AVIOContext *pb, int size)
320 av_assert0(size >= 2);
322 put_ebml_id(pb, EBML_ID_VOID);
323 // we need to subtract the length needed to store the size from the
324 // size we need to reserve so 2 cases, we use 8 bytes to store the
325 // size if possible, 1 byte otherwise
328 put_ebml_length(pb, size, 0);
331 put_ebml_length(pb, size, 8);
333 ffio_fill(pb, 0, size);
336 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
337 uint64_t expectedsize)
339 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
341 put_ebml_id(pb, elementid);
342 put_ebml_size_unknown(pb, bytes);
343 return (ebml_master) { avio_tell(pb), bytes };
346 static void end_ebml_master(AVIOContext *pb, ebml_master master)
348 int64_t pos = avio_tell(pb);
350 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
352 put_ebml_length(pb, pos - master.pos, master.sizebytes);
353 avio_seek(pb, pos, SEEK_SET);
356 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
359 mkv_seekhead *seekhead = &mkv->seekhead;
361 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
363 seekhead->entries[seekhead->num_entries].elementid = elementid;
364 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
367 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
371 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
375 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
380 static int end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
381 MatroskaMuxContext *mkv, uint32_t id,
382 int length_size, int keep_buffer,
385 uint8_t *buf, crc[4];
386 int ret, size, skip = 0;
388 size = avio_get_dyn_buf(*dyn_cp, &buf);
389 if ((ret = (*dyn_cp)->error) < 0)
393 mkv_add_seekhead_entry(mkv, id, avio_tell(pb));
396 put_ebml_length(pb, size, length_size);
397 if (mkv->write_crc) {
398 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
399 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
400 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
402 avio_write(pb, buf + skip, size - skip);
406 ffio_reset_dyn_buf(*dyn_cp);
408 ffio_free_dyn_buf(dyn_cp);
414 * Output EBML master. Keep the buffer if seekable, allowing for later updates.
415 * Furthermore always add a SeekHead Entry for this element.
417 static int end_ebml_master_crc32_tentatively(AVIOContext *pb,
418 ebml_stored_master *elem,
419 MatroskaMuxContext *mkv, uint32_t id)
421 if (IS_SEEKABLE(pb, mkv)) {
423 int size = avio_get_dyn_buf(elem->bc, &buf);
425 if (elem->bc->error < 0)
426 return elem->bc->error;
428 elem->pos = avio_tell(pb);
429 mkv_add_seekhead_entry(mkv, id, elem->pos);
432 put_ebml_length(pb, size, 0);
433 avio_write(pb, buf, size);
437 return end_ebml_master_crc32(pb, &elem->bc, mkv, id, 0, 0, 1);
440 static void put_xiph_size(AVIOContext *pb, int size)
442 ffio_fill(pb, 255, size / 255);
443 avio_w8(pb, size % 255);
447 * Free the members allocated in the mux context.
449 static void mkv_deinit(AVFormatContext *s)
451 MatroskaMuxContext *mkv = s->priv_data;
453 av_packet_unref(&mkv->cur_audio_pkt);
455 ffio_free_dyn_buf(&mkv->cluster_bc);
456 ffio_free_dyn_buf(&mkv->info.bc);
457 ffio_free_dyn_buf(&mkv->track.bc);
458 ffio_free_dyn_buf(&mkv->tags.bc);
460 av_freep(&mkv->cues.entries);
461 av_freep(&mkv->tracks);
465 * Initialize the SeekHead element to be ready to index level 1 Matroska
466 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
467 * will be reserved at the current file location.
469 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
471 mkv->seekhead.filepos = avio_tell(pb);
472 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
473 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
474 // that an EBML void element will fit afterwards
475 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
476 put_ebml_void(pb, mkv->seekhead.reserved_size);
480 * Write the SeekHead to the file at the location reserved for it
481 * and seek to destpos afterwards. When error_on_seek_failure
482 * is not set, failure to seek to the position designated for the
483 * SeekHead is not considered an error and it is presumed that
484 * destpos is the current position; failure to seek to destpos
485 * afterwards is always an error.
487 * @return 0 on success, < 0 on error.
489 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
490 int error_on_seek_failure, int64_t destpos)
492 AVIOContext *dyn_cp = NULL;
493 mkv_seekhead *seekhead = &mkv->seekhead;
494 int64_t remaining, ret64;
497 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
498 return error_on_seek_failure ? ret64 : 0;
500 ret = start_ebml_master_crc32(&dyn_cp, mkv);
504 for (i = 0; i < seekhead->num_entries; i++) {
505 mkv_seekhead_entry *entry = &seekhead->entries[i];
506 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
509 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
510 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
511 put_ebml_id(dyn_cp, entry->elementid);
513 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
514 end_ebml_master(dyn_cp, seekentry);
516 ret = end_ebml_master_crc32(pb, &dyn_cp, mkv,
517 MATROSKA_ID_SEEKHEAD, 0, 0, 0);
521 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
522 put_ebml_void(pb, remaining);
524 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
530 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
531 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
533 mkv_cues *cues = &mkv->cues;
534 mkv_cuepoint *entries = cues->entries;
539 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
541 return AVERROR(ENOMEM);
542 cues->entries = entries;
544 cues->entries[cues->num_entries].pts = ts;
545 cues->entries[cues->num_entries].stream_idx = stream;
546 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
547 cues->entries[cues->num_entries].relative_pos = relative_pos;
548 cues->entries[cues->num_entries++].duration = duration;
553 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
554 mkv_cues *cues, mkv_track *tracks, int num_tracks)
556 AVIOContext *cuepoint;
559 ret = avio_open_dyn_buf(&cuepoint);
563 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
565 uint64_t pts = entry->pts;
569 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
571 // put all the entries from different tracks that have the exact same
572 // timestamp into the same CuePoint
573 for (int j = 0; j < num_tracks; j++)
574 tracks[j].has_cue = 0;
576 ebml_master track_positions;
577 int idx = entry->stream_idx;
579 av_assert0(idx >= 0 && idx < num_tracks);
580 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
582 tracks[idx].has_cue = 1;
583 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
584 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
585 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
586 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
587 if (entry->duration != -1)
588 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
589 end_ebml_master(cuepoint, track_positions);
590 } while (++entry < end && entry->pts == pts);
591 size = avio_get_dyn_buf(cuepoint, &buf);
592 if ((ret = cuepoint->error) < 0)
594 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
595 ffio_reset_dyn_buf(cuepoint);
597 ffio_free_dyn_buf(&cuepoint);
602 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb,
603 const AVCodecParameters *par)
605 const uint8_t *header_start[3];
607 int first_header_size;
610 if (par->codec_id == AV_CODEC_ID_VORBIS)
611 first_header_size = 30;
613 first_header_size = 42;
615 err = avpriv_split_xiph_headers(par->extradata, par->extradata_size,
616 first_header_size, header_start, header_len);
618 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
622 avio_w8(pb, 2); // number packets - 1
623 for (j = 0; j < 2; j++) {
624 put_xiph_size(pb, header_len[j]);
626 for (j = 0; j < 3; j++)
627 avio_write(pb, header_start[j], header_len[j]);
632 static int put_wv_codecpriv(AVIOContext *pb, const AVCodecParameters *par)
634 if (par->extradata && par->extradata_size == 2)
635 avio_write(pb, par->extradata, 2);
637 avio_wl16(pb, 0x410); // fallback to the most recent version
641 static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb,
642 const AVCodecParameters *par)
644 int write_comment = (par->channel_layout &&
645 !(par->channel_layout & ~0x3ffffULL) &&
646 !ff_flac_is_native_layout(par->channel_layout));
647 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
654 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
655 "Lavf" : LIBAVFORMAT_IDENT;
656 AVDictionary *dict = NULL;
660 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
661 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
663 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
664 av_assert1(len < (1 << 24) - 4);
669 ff_vorbiscomment_write(pb, dict, vendor, NULL, 0);
677 static int get_aac_sample_rates(AVFormatContext *s, MatroskaMuxContext *mkv,
678 const uint8_t *extradata, int extradata_size,
679 int *sample_rate, int *output_sample_rate)
681 MPEG4AudioConfig mp4ac;
684 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
685 /* Don't abort if the failure is because of missing extradata. Assume in that
686 * case a bitstream filter will provide the muxer with the extradata in the
688 * Abort however if s->pb is not seekable, as we would not be able to seek back
689 * to write the sample rate elements once the extradata shows up, anyway. */
690 if (ret < 0 && (extradata_size || !IS_SEEKABLE(s->pb, mkv))) {
691 av_log(s, AV_LOG_ERROR,
692 "Error parsing AAC extradata, unable to determine samplerate.\n");
693 return AVERROR(EINVAL);
697 /* This will only happen when this function is called while writing the
698 * header and no extradata is available. The space for this element has
699 * to be reserved for when this function is called again after the
700 * extradata shows up in the first packet, as there's no way to know if
701 * output_sample_rate will be different than sample_rate or not. */
702 *output_sample_rate = *sample_rate;
704 *sample_rate = mp4ac.sample_rate;
705 *output_sample_rate = mp4ac.ext_sample_rate;
710 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
711 const AVCodecParameters *par,
714 switch (par->codec_id) {
715 case AV_CODEC_ID_VORBIS:
716 case AV_CODEC_ID_THEORA:
717 return put_xiph_codecpriv(s, dyn_cp, par);
718 case AV_CODEC_ID_FLAC:
719 return put_flac_codecpriv(s, dyn_cp, par);
720 case AV_CODEC_ID_WAVPACK:
721 return put_wv_codecpriv(dyn_cp, par);
722 case AV_CODEC_ID_H264:
723 return ff_isom_write_avcc(dyn_cp, par->extradata,
724 par->extradata_size);
725 case AV_CODEC_ID_HEVC:
726 return ff_isom_write_hvcc(dyn_cp, par->extradata,
727 par->extradata_size, 0);
728 case AV_CODEC_ID_AV1:
729 if (par->extradata_size)
730 return ff_isom_write_av1c(dyn_cp, par->extradata,
731 par->extradata_size);
733 put_ebml_void(pb, 4 + 3);
735 case AV_CODEC_ID_ALAC:
736 if (par->extradata_size < 36) {
737 av_log(s, AV_LOG_ERROR,
738 "Invalid extradata found, ALAC expects a 36-byte "
740 return AVERROR_INVALIDDATA;
742 avio_write(dyn_cp, par->extradata + 12,
743 par->extradata_size - 12);
745 case AV_CODEC_ID_AAC:
746 if (par->extradata_size)
747 avio_write(dyn_cp, par->extradata, par->extradata_size);
749 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
752 if (par->codec_id == AV_CODEC_ID_PRORES &&
753 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
754 avio_wl32(dyn_cp, par->codec_tag);
755 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
756 avio_write(dyn_cp, par->extradata, par->extradata_size);
762 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
763 AVCodecParameters *par,
764 int native_id, int qt_id)
768 int ret, codecpriv_size;
770 ret = avio_open_dyn_buf(&dyn_cp);
775 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
776 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
779 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
781 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
782 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
785 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
786 avio_wl32(dyn_cp, par->codec_tag);
787 for(i = 0; i < 0x5a - 8; i++)
790 avio_write(dyn_cp, par->extradata, par->extradata_size);
792 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
793 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
794 avcodec_get_name(par->codec_id));
797 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
799 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
800 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
801 avcodec_get_name(par->codec_id));
802 ret = AVERROR(EINVAL);
805 ff_put_bmp_header(dyn_cp, par, 0, 0);
807 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
809 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
811 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
812 avcodec_get_name(par->codec_id));
813 ret = AVERROR(EINVAL);
816 par->codec_tag = tag;
818 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
822 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
823 if ((ret = dyn_cp->error) >= 0 && codecpriv_size)
824 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
827 ffio_free_dyn_buf(&dyn_cp);
831 static void mkv_write_video_color(AVIOContext *pb, const AVStream *st,
832 const AVCodecParameters *par)
834 /* 18 Elements with two bytes ID, one byte length field, 8 bytes payload
835 * a master element with two bytes ID and one byte length field
836 * plus another byte to stay clear of the end. */
837 uint8_t colour[(2 + 1 + 8) * 18 + (2 + 1) + 1];
838 AVIOContext buf, *dyn_cp = &buf;
840 const void *side_data;
842 ffio_init_context(dyn_cp, colour, sizeof(colour), 1, NULL, NULL, NULL, NULL);
844 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
845 par->color_trc < AVCOL_TRC_NB) {
846 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
849 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
850 par->color_space < AVCOL_SPC_NB) {
851 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
853 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
854 par->color_primaries < AVCOL_PRI_NB) {
855 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
857 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
858 par->color_range < AVCOL_RANGE_NB) {
859 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
861 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
862 par->chroma_location <= AVCHROMA_LOC_TOP) {
865 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
866 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
867 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
870 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
873 const AVContentLightMetadata *metadata = side_data;
874 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
875 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
878 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
881 ebml_master meta_element = start_ebml_master(
882 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
883 const AVMasteringDisplayMetadata *metadata = side_data;
884 if (metadata->has_primaries) {
885 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
886 av_q2d(metadata->display_primaries[0][0]));
887 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
888 av_q2d(metadata->display_primaries[0][1]));
889 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
890 av_q2d(metadata->display_primaries[1][0]));
891 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
892 av_q2d(metadata->display_primaries[1][1]));
893 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
894 av_q2d(metadata->display_primaries[2][0]));
895 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
896 av_q2d(metadata->display_primaries[2][1]));
897 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
898 av_q2d(metadata->white_point[0]));
899 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
900 av_q2d(metadata->white_point[1]));
902 if (metadata->has_luminance) {
903 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
904 av_q2d(metadata->max_luminance));
905 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
906 av_q2d(metadata->min_luminance));
908 end_ebml_master(dyn_cp, meta_element);
911 colorinfo_size = avio_tell(dyn_cp);
913 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLOR, colour, colorinfo_size);
916 static void mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
919 ebml_master projection;
922 const AVSphericalMapping *spherical =
923 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
929 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
930 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
931 spherical->projection != AV_SPHERICAL_CUBEMAP) {
932 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
936 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
937 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
938 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
939 4 * (2 + 1 + 8) + (2 + 1 + 20));
941 switch (spherical->projection) {
942 case AV_SPHERICAL_EQUIRECTANGULAR:
943 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
944 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
946 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
947 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
948 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
949 AV_WB32(private, 0); // version + flags
950 AV_WB32(private + 4, spherical->bound_top);
951 AV_WB32(private + 8, spherical->bound_bottom);
952 AV_WB32(private + 12, spherical->bound_left);
953 AV_WB32(private + 16, spherical->bound_right);
954 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
957 case AV_SPHERICAL_CUBEMAP:
958 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
959 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
960 AV_WB32(private, 0); // version + flags
961 AV_WB32(private + 4, 0); // layout
962 AV_WB32(private + 8, spherical->padding);
963 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
971 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
972 (double) spherical->yaw / (1 << 16));
973 if (spherical->pitch)
974 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
975 (double) spherical->pitch / (1 << 16));
977 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
978 (double) spherical->roll / (1 << 16));
980 end_ebml_master(pb, projection);
983 static void mkv_write_field_order(AVIOContext *pb, int mode,
984 enum AVFieldOrder field_order)
986 switch (field_order) {
987 case AV_FIELD_UNKNOWN:
989 case AV_FIELD_PROGRESSIVE:
990 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
991 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
997 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
998 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
999 if (mode != MODE_WEBM) {
1000 switch (field_order) {
1002 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1003 MATROSKA_VIDEO_FIELDORDER_TT);
1006 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1007 MATROSKA_VIDEO_FIELDORDER_BB);
1010 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1011 MATROSKA_VIDEO_FIELDORDER_TB);
1014 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1015 MATROSKA_VIDEO_FIELDORDER_BT);
1022 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1023 AVStream *st, int mode, int *h_width, int *h_height)
1025 const AVDictionaryEntry *tag;
1026 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1027 const AVStereo3D *stereo;
1031 // convert metadata into proper side data and add it to the stream
1032 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1033 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1034 int stereo_mode = atoi(tag->value);
1036 for (int i = 0; i < MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1037 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1042 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1043 stereo_mode != 10 && stereo_mode != 12) {
1044 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1050 stereo = (const AVStereo3D*)av_stream_get_side_data(st, AV_PKT_DATA_STEREO3D,
1053 switch (stereo->type) {
1054 case AV_STEREO3D_2D:
1055 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1057 case AV_STEREO3D_SIDEBYSIDE:
1058 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1059 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1060 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1063 case AV_STEREO3D_TOPBOTTOM:
1064 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1065 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1069 case AV_STEREO3D_CHECKERBOARD:
1070 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1071 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1074 case AV_STEREO3D_LINES:
1075 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1076 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1080 case AV_STEREO3D_COLUMNS:
1081 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1082 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1086 case AV_STEREO3D_FRAMESEQUENCE:
1087 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1088 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1094 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1097 // if webm, do not write unsupported modes
1098 if ((mode == MODE_WEBM &&
1099 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1100 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1101 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1102 av_log(s, AV_LOG_ERROR,
1103 "The specified stereo mode is not valid.\n");
1104 return AVERROR(EINVAL);
1107 // write StereoMode if format is valid
1108 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1113 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1114 AVStream *st, mkv_track *track, AVIOContext *pb,
1117 AVCodecParameters *par = st->codecpar;
1118 ebml_master subinfo, track_master;
1122 int sample_rate = par->sample_rate;
1123 int output_sample_rate = 0;
1124 int display_width_div = 1;
1125 int display_height_div = 1;
1127 const AVDictionaryEntry *tag;
1129 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1132 if (par->codec_id == AV_CODEC_ID_AAC) {
1133 ret = get_aac_sample_rates(s, mkv, par->extradata, par->extradata_size,
1134 &sample_rate, &output_sample_rate);
1139 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1140 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1141 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1142 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGLACING, 0); // no lacing (yet)
1144 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1145 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1146 tag = av_dict_get(st->metadata, "language", NULL, 0);
1147 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1148 tag && tag->value ? tag->value : "und");
1150 // The default value for TRACKFLAGDEFAULT is 1, so add element
1151 // if we need to clear it.
1153 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, 0);
1155 if (st->disposition & AV_DISPOSITION_FORCED)
1156 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1158 if (mkv->mode == MODE_WEBM) {
1159 const char *codec_id;
1160 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1161 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1162 if (ff_webm_codec_tags[j].id == par->codec_id) {
1163 codec_id = ff_webm_codec_tags[j].str;
1168 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1169 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1170 codec_id = "D_WEBVTT/CAPTIONS";
1171 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1172 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1173 codec_id = "D_WEBVTT/DESCRIPTIONS";
1174 native_id = MATROSKA_TRACK_TYPE_METADATA;
1175 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1176 codec_id = "D_WEBVTT/METADATA";
1177 native_id = MATROSKA_TRACK_TYPE_METADATA;
1179 codec_id = "D_WEBVTT/SUBTITLES";
1180 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1185 av_log(s, AV_LOG_ERROR,
1186 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1187 return AVERROR(EINVAL);
1190 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1192 // look for a codec ID string specific to mkv to use,
1193 // if none are found, use AVI codes
1194 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1195 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1196 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1197 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1203 if (mkv->allow_raw_vfw) {
1206 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1207 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1208 return AVERROR(EINVAL);
1213 switch (par->codec_type) {
1214 case AVMEDIA_TYPE_VIDEO:
1215 mkv->have_video = 1;
1216 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1218 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1219 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1220 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1221 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1222 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1223 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1226 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1227 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1228 par->codec_id == AV_CODEC_ID_SVQ1 ||
1229 par->codec_id == AV_CODEC_ID_SVQ3 ||
1230 par->codec_id == AV_CODEC_ID_CINEPAK))
1234 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1235 else if (!native_id) {
1236 // if there is no mkv-specific codec ID, use VFW mode
1237 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1238 track->write_dts = 1;
1239 s->internal->avoid_negative_ts_use_pts = 0;
1242 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1244 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1245 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1247 mkv_write_field_order(pb, mkv->mode, par->field_order);
1249 // check both side data and metadata for stereo information,
1250 // write the result to the bitstream if any is found
1251 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1253 &display_height_div);
1257 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1258 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1259 (par->format == AV_PIX_FMT_YUVA420P)) {
1260 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1263 // write DisplayWidth and DisplayHeight, they contain the size of
1264 // a single source view and/or the display aspect ratio
1265 if (st->sample_aspect_ratio.num) {
1266 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1267 if (d_width > INT_MAX) {
1268 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1269 return AVERROR(EINVAL);
1271 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1272 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1273 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1274 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1276 AVRational display_aspect_ratio;
1277 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1278 par->width * (int64_t)st->sample_aspect_ratio.num,
1279 par->height * (int64_t)st->sample_aspect_ratio.den,
1281 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1282 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1283 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1286 } else if (display_width_div != 1 || display_height_div != 1) {
1287 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1288 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1289 } else if (mkv->mode != MODE_WEBM)
1290 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1292 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1293 uint32_t color_space = av_le2ne32(par->codec_tag);
1294 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1296 mkv_write_video_color(pb, st, par);
1297 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 return end_ebml_master_crc32_tentatively(pb, &mkv->track, mkv,
1431 MATROSKA_ID_TRACKS);
1434 static int mkv_write_simpletag(AVIOContext *pb, const AVDictionaryEntry *t)
1436 uint8_t *key = av_strdup(t->key);
1438 const uint8_t *lang = NULL;
1442 return AVERROR(ENOMEM);
1444 if ((p = strrchr(p, '-')) &&
1445 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1452 else if (*p >= 'a' && *p <= 'z')
1457 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1458 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1460 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1461 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1462 end_ebml_master(pb, tag);
1468 static int mkv_write_tag_targets(MatroskaMuxContext *mkv, AVIOContext **pb,
1469 ebml_master *tag, uint32_t elementid, uint64_t uid)
1471 ebml_master targets;
1475 ret = start_ebml_master_crc32(pb, mkv);
1480 *tag = start_ebml_master(*pb, MATROSKA_ID_TAG, 0);
1481 targets = start_ebml_master(*pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1483 put_ebml_uid(*pb, elementid, uid);
1484 end_ebml_master(*pb, targets);
1488 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1490 return av_strcasecmp(name, "title") &&
1491 av_strcasecmp(name, "stereo_mode") &&
1492 av_strcasecmp(name, "creation_time") &&
1493 av_strcasecmp(name, "encoding_tool") &&
1494 av_strcasecmp(name, "duration") &&
1495 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1496 av_strcasecmp(name, "language")) &&
1497 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1498 (av_strcasecmp(name, "filename") &&
1499 av_strcasecmp(name, "mimetype")));
1502 static int mkv_write_tag(MatroskaMuxContext *mkv, const AVDictionary *m,
1503 AVIOContext **pb, ebml_master *tag,
1504 uint32_t elementid, uint64_t uid)
1506 const AVDictionaryEntry *t = NULL;
1510 ret = mkv_write_tag_targets(mkv, pb, tag ? tag : &tag2, elementid, uid);
1514 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1515 if (mkv_check_tag_name(t->key, elementid)) {
1516 ret = mkv_write_simpletag(*pb, t);
1523 end_ebml_master(*pb, tag2);
1528 static int mkv_check_tag(const AVDictionary *m, uint32_t elementid)
1530 const AVDictionaryEntry *t = NULL;
1532 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1533 if (mkv_check_tag_name(t->key, elementid))
1539 static int mkv_write_tags(AVFormatContext *s)
1541 MatroskaMuxContext *mkv = s->priv_data;
1542 ebml_master tag, *tagp = IS_SEEKABLE(s->pb, mkv) ? &tag : NULL;
1545 mkv->wrote_tags = 1;
1547 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1549 if (mkv_check_tag(s->metadata, 0)) {
1550 ret = mkv_write_tag(mkv, s->metadata, &mkv->tags.bc, NULL, 0, 0);
1555 for (i = 0; i < s->nb_streams; i++) {
1556 const AVStream *st = s->streams[i];
1557 mkv_track *track = &mkv->tracks[i];
1559 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1562 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1565 ret = mkv_write_tag(mkv, st->metadata, &mkv->tags.bc, tagp,
1566 MATROSKA_ID_TAGTARGETS_TRACKUID, track->uid);
1571 AVIOContext *pb = mkv->tags.bc;
1572 ebml_master simpletag;
1574 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1576 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1577 track->duration_offset = avio_tell(pb);
1579 // Reserve space to write duration as a 20-byte string.
1580 // 2 (ebml id) + 1 (data size) + 20 (data)
1581 put_ebml_void(pb, 23);
1582 end_ebml_master(pb, simpletag);
1583 end_ebml_master(pb, tag);
1587 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1588 for (i = 0; i < s->nb_streams; i++) {
1589 const mkv_track *track = &mkv->tracks[i];
1590 const AVStream *st = s->streams[i];
1592 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1595 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1598 ret = mkv_write_tag(mkv, st->metadata, &mkv->tags.bc, NULL,
1599 MATROSKA_ID_TAGTARGETS_ATTACHUID, track->uid);
1606 return end_ebml_master_crc32_tentatively(s->pb, &mkv->tags, mkv,
1612 static int mkv_write_chapters(AVFormatContext *s)
1614 MatroskaMuxContext *mkv = s->priv_data;
1615 AVIOContext *dyn_cp = NULL, *dyn_tags = NULL, **tags, *pb = s->pb;
1616 ebml_master editionentry;
1617 uint64_t chapter_id_offset = 0;
1618 AVRational scale = {1, 1E9};
1621 if (!s->nb_chapters || mkv->wrote_chapters)
1624 for (i = 0; i < s->nb_chapters; i++)
1625 if (!s->chapters[i]->id) {
1626 chapter_id_offset = 1;
1630 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1634 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1635 if (mkv->mode != MODE_WEBM) {
1636 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1637 /* If mkv_write_tags() has already been called, then any tags
1638 * corresponding to chapters will be put into a new Tags element. */
1639 tags = mkv->wrote_tags ? &dyn_tags : &mkv->tags.bc;
1643 for (i = 0; i < s->nb_chapters; i++) {
1644 ebml_master chapteratom, chapterdisplay;
1645 const AVChapter *c = s->chapters[i];
1646 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1647 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1648 const AVDictionaryEntry *t;
1649 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1650 av_log(s, AV_LOG_ERROR,
1651 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1652 chapterstart, chapterend);
1653 ret = AVERROR_INVALIDDATA;
1657 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1658 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1659 (uint32_t)c->id + chapter_id_offset);
1660 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1661 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1662 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1663 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1664 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1665 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1666 end_ebml_master(dyn_cp, chapterdisplay);
1668 end_ebml_master(dyn_cp, chapteratom);
1670 if (tags && mkv_check_tag(c->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID)) {
1671 ret = mkv_write_tag(mkv, c->metadata, tags, NULL,
1672 MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1673 (uint32_t)c->id + chapter_id_offset);
1678 end_ebml_master(dyn_cp, editionentry);
1679 mkv->wrote_chapters = 1;
1681 ret = end_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS, 0, 0, 1);
1685 return end_ebml_master_crc32(pb, &dyn_tags, mkv,
1686 MATROSKA_ID_TAGS, 0, 0, 1);
1691 /* tags == &mkv->tags.bc can only happen if mkv->tags.bc was
1692 * initially NULL, so we never free older tags. */
1693 ffio_free_dyn_buf(tags);
1695 ffio_free_dyn_buf(&dyn_cp);
1699 static const char *get_mimetype(const AVStream *st)
1701 const AVDictionaryEntry *t;
1703 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1705 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
1706 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1707 if (desc && desc->mime_types) {
1708 return desc->mime_types[0];
1709 } else if (st->codecpar->codec_id == AV_CODEC_ID_TEXT)
1710 return "text/plain";
1716 static int mkv_write_attachments(AVFormatContext *s)
1718 MatroskaMuxContext *mkv = s->priv_data;
1719 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1722 if (!mkv->nb_attachments)
1725 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1729 for (i = 0; i < s->nb_streams; i++) {
1730 const AVStream *st = s->streams[i];
1731 mkv_track *track = &mkv->tracks[i];
1732 ebml_master attached_file;
1733 const AVDictionaryEntry *t;
1734 const char *mimetype;
1736 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1739 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1741 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1742 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1743 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1744 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1745 return AVERROR(EINVAL);
1747 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1749 mimetype = get_mimetype(st);
1750 av_assert0(mimetype);
1751 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1752 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1753 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1754 end_ebml_master(dyn_cp, attached_file);
1756 return end_ebml_master_crc32(pb, &dyn_cp, mkv,
1757 MATROSKA_ID_ATTACHMENTS, 0, 0, 1);
1760 static int64_t get_metadata_duration(AVFormatContext *s)
1762 const AVDictionaryEntry *duration = av_dict_get(s->metadata, "DURATION",
1767 if (duration && (av_parse_time(&us, duration->value, 1) == 0) && us > 0) {
1768 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1772 for (unsigned i = 0; i < s->nb_streams; i++) {
1774 duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1776 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1777 max = FFMAX(max, us);
1780 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1784 static int mkv_write_header(AVFormatContext *s)
1786 MatroskaMuxContext *mkv = s->priv_data;
1787 AVIOContext *pb = s->pb;
1788 ebml_master ebml_header;
1789 const AVDictionaryEntry *tag;
1790 int ret, i, version = 2;
1791 int64_t creation_time;
1793 if (mkv->mode != MODE_WEBM ||
1794 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1795 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1798 for (i = 0; i < s->nb_streams; i++) {
1799 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1800 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1801 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1805 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1806 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1807 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1808 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1809 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1810 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1811 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1812 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1813 end_ebml_master(pb, ebml_header);
1815 put_ebml_id(pb, MATROSKA_ID_SEGMENT);
1816 put_ebml_size_unknown(pb, 8);
1817 mkv->segment_offset = avio_tell(pb);
1819 // We write a SeekHead at the beginning to point to all other level
1820 // one elements (except Clusters).
1821 mkv_start_seekhead(mkv, pb);
1823 ret = start_ebml_master_crc32(&mkv->info.bc, mkv);
1828 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1829 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1830 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1831 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1832 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1833 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1834 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1836 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1838 if (mkv->mode != MODE_WEBM)
1839 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1841 const char *ident = "Lavf";
1842 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1843 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1846 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1847 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1848 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1849 uint8_t date_utc_buf[8];
1850 AV_WB64(date_utc_buf, date_utc);
1851 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1854 // reserve space for the duration
1856 mkv->duration_offset = avio_tell(pb);
1857 if (!mkv->is_live) {
1858 int64_t metadata_duration = get_metadata_duration(s);
1860 if (s->duration > 0) {
1861 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1862 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1863 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1864 } else if (metadata_duration > 0) {
1865 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1866 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1867 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1868 } else if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
1869 put_ebml_void(pb, 11); // assumes double-precision float to be written
1872 ret = end_ebml_master_crc32_tentatively(s->pb, &mkv->info,
1873 mkv, MATROSKA_ID_INFO);
1878 ret = mkv_write_tracks(s);
1882 ret = mkv_write_chapters(s);
1886 if (mkv->mode != MODE_WEBM) {
1887 ret = mkv_write_attachments(s);
1892 /* Must come after mkv_write_chapters() to write chapter tags
1893 * into the same Tags element as the other tags. */
1894 ret = mkv_write_tags(s);
1898 if (!IS_SEEKABLE(pb, mkv)) {
1899 ret = mkv_write_seekhead(pb, mkv, 0, avio_tell(pb));
1904 if (s->metadata_header_padding > 0) {
1905 if (s->metadata_header_padding == 1)
1906 s->metadata_header_padding++;
1907 put_ebml_void(pb, s->metadata_header_padding);
1910 if (mkv->reserve_cues_space) {
1911 if (IS_SEEKABLE(pb, mkv)) {
1912 mkv->cues_pos = avio_tell(pb);
1913 if (mkv->reserve_cues_space == 1)
1914 mkv->reserve_cues_space++;
1915 put_ebml_void(pb, mkv->reserve_cues_space);
1917 mkv->reserve_cues_space = -1;
1920 av_init_packet(&mkv->cur_audio_pkt);
1921 mkv->cur_audio_pkt.size = 0;
1922 mkv->cluster_pos = -1;
1924 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1925 // after 4k and on a keyframe
1926 if (IS_SEEKABLE(pb, mkv)) {
1927 if (mkv->cluster_time_limit < 0)
1928 mkv->cluster_time_limit = 5000;
1929 if (mkv->cluster_size_limit < 0)
1930 mkv->cluster_size_limit = 5 * 1024 * 1024;
1932 if (mkv->cluster_time_limit < 0)
1933 mkv->cluster_time_limit = 1000;
1934 if (mkv->cluster_size_limit < 0)
1935 mkv->cluster_size_limit = 32 * 1024;
1941 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1943 int size = pkt_size + track_num_size + 3;
1944 size += ebml_length_size(size);
1945 size += 2; // EBML ID for block and block duration
1946 size += 9; // max size of block duration incl. length field
1950 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1957 dst = av_malloc(srclen);
1959 return AVERROR(ENOMEM);
1961 while (srclen >= WV_HEADER_SIZE) {
1964 ret = ff_wv_parse_header(&header, src);
1967 src += WV_HEADER_SIZE;
1968 srclen -= WV_HEADER_SIZE;
1970 if (srclen < header.blocksize) {
1971 ret = AVERROR_INVALIDDATA;
1975 if (header.initial) {
1976 AV_WL32(dst + offset, header.samples);
1979 AV_WL32(dst + offset, header.flags);
1980 AV_WL32(dst + offset + 4, header.crc);
1983 if (!(header.initial && header.final)) {
1984 AV_WL32(dst + offset, header.blocksize);
1988 memcpy(dst + offset, src, header.blocksize);
1989 src += header.blocksize;
1990 srclen -= header.blocksize;
1991 offset += header.blocksize;
2003 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2004 uint32_t blockid, const AVPacket *pkt, int keyframe)
2006 MatroskaMuxContext *mkv = s->priv_data;
2007 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2008 mkv_track *track = &mkv->tracks[pkt->stream_index];
2009 uint8_t *data = NULL, *side_data = NULL;
2010 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2011 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2012 uint64_t additional_id;
2013 int64_t discard_padding = 0;
2014 unsigned track_number = track->track_num;
2015 ebml_master block_group, block_additions, block_more;
2017 ts += track->ts_offset;
2019 /* The following string is identical to the one in mkv_write_vtt_blocks
2020 * so that only one copy needs to exist in binaries. */
2021 av_log(s, AV_LOG_DEBUG,
2022 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2023 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2024 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2025 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2026 mkv->cluster_pos, track_number, keyframe != 0);
2028 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2029 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2030 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2031 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2032 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2033 /* extradata is Annex B, assume the bitstream is too and convert it */
2034 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2035 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2036 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2037 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2038 err = mkv_strip_wavpack(pkt->data, &data, &size);
2043 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2044 "a packet from stream %d.\n", pkt->stream_index);
2048 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2049 /* Matroska specification requires to remove the first QuickTime atom
2055 side_data = av_packet_get_side_data(pkt,
2056 AV_PKT_DATA_SKIP_SAMPLES,
2058 if (side_data && side_data_size >= 10) {
2059 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2060 (AVRational){1, par->sample_rate},
2061 (AVRational){1, 1000000000});
2064 side_data = av_packet_get_side_data(pkt,
2065 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2068 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2069 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2073 side_data_size -= 8;
2077 if (side_data_size || discard_padding) {
2078 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2079 blockid = MATROSKA_ID_BLOCK;
2082 put_ebml_id(pb, blockid);
2083 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2084 put_ebml_num(pb, track_number, track->track_num_size);
2085 avio_wb16(pb, ts - mkv->cluster_pts);
2086 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2087 avio_write(pb, data + offset, size);
2088 if (data != pkt->data)
2091 if (blockid == MATROSKA_ID_BLOCK && !keyframe)
2092 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2093 track->last_timestamp = ts;
2095 if (discard_padding)
2096 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2098 if (side_data_size) {
2099 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2100 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2101 /* Until dbc50f8a our demuxer used a wrong default value
2102 * of BlockAddID, so we write it unconditionally. */
2103 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2104 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2105 side_data, side_data_size);
2106 end_ebml_master(pb, block_more);
2107 end_ebml_master(pb, block_additions);
2109 if (side_data_size || discard_padding)
2110 end_ebml_master(pb, block_group);
2115 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, const AVPacket *pkt)
2117 MatroskaMuxContext *mkv = s->priv_data;
2118 mkv_track *track = &mkv->tracks[pkt->stream_index];
2119 ebml_master blockgroup;
2120 int id_size, settings_size, size;
2121 const char *id, *settings;
2122 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2123 const int flags = 0;
2126 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2131 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2133 settings = settings ? settings : "";
2135 size = id_size + 1 + settings_size + 1 + pkt->size;
2137 /* The following string is identical to the one in mkv_write_block so that
2138 * only one copy needs to exist in binaries. */
2139 av_log(s, AV_LOG_DEBUG,
2140 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2141 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2142 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2143 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2144 mkv->cluster_pos, track->track_num, 1);
2146 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2147 mkv_blockgroup_size(size, track->track_num_size));
2149 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2150 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2151 put_ebml_num(pb, track->track_num, track->track_num_size);
2152 avio_wb16(pb, ts - mkv->cluster_pts);
2154 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2156 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2157 end_ebml_master(pb, blockgroup);
2159 return pkt->duration;
2162 static int mkv_end_cluster(AVFormatContext *s)
2164 MatroskaMuxContext *mkv = s->priv_data;
2167 if (!mkv->have_video) {
2168 for (unsigned i = 0; i < s->nb_streams; i++)
2169 mkv->tracks[i].has_cue = 0;
2171 mkv->cluster_pos = -1;
2172 ret = end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv,
2173 MATROSKA_ID_CLUSTER, 0, 1, 0);
2177 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2181 static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
2183 MatroskaMuxContext *mkv = s->priv_data;
2184 mkv_track *track = &mkv->tracks[pkt->stream_index];
2185 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2187 int side_data_size = 0, ret;
2189 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2192 switch (par->codec_id) {
2193 case AV_CODEC_ID_AAC:
2194 if (side_data_size && mkv->track.bc) {
2195 int filler, output_sample_rate = 0;
2196 ret = get_aac_sample_rates(s, mkv, side_data, side_data_size,
2197 &track->sample_rate, &output_sample_rate);
2200 if (!output_sample_rate)
2201 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2202 ret = ff_alloc_extradata(par, side_data_size);
2205 memcpy(par->extradata, side_data, side_data_size);
2206 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2207 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2208 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->track.bc) - track->codecpriv_offset);
2210 put_ebml_void(mkv->track.bc, filler);
2211 avio_seek(mkv->track.bc, track->sample_rate_offset, SEEK_SET);
2212 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2213 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2214 } else if (!par->extradata_size && !track->sample_rate) {
2215 // No extradata (codecpar or packet side data).
2216 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2217 return AVERROR(EINVAL);
2220 case AV_CODEC_ID_FLAC:
2221 if (side_data_size && mkv->track.bc) {
2222 uint8_t *old_extradata = par->extradata;
2223 if (side_data_size != par->extradata_size) {
2224 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2226 return AVERROR(EINVAL);
2228 par->extradata = side_data;
2229 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2230 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2231 par->extradata = old_extradata;
2234 // FIXME: Remove the following once libaom starts propagating extradata during init()
2235 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2236 case AV_CODEC_ID_AV1:
2237 if (side_data_size && mkv->track.bc && !par->extradata_size) {
2238 AVIOContext *dyn_cp;
2241 ret = avio_open_dyn_buf(&dyn_cp);
2244 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2245 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
2246 if ((ret = dyn_cp->error) < 0 ||
2247 !codecpriv_size && (ret = AVERROR_INVALIDDATA)) {
2248 ffio_free_dyn_buf(&dyn_cp);
2251 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2252 // Do not write the OBUs as we don't have space saved for them
2253 put_ebml_binary(mkv->track.bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2254 ffio_free_dyn_buf(&dyn_cp);
2255 ret = ff_alloc_extradata(par, side_data_size);
2258 memcpy(par->extradata, side_data, side_data_size);
2259 } else if (!par->extradata_size)
2260 return AVERROR_INVALIDDATA;
2264 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2271 static int mkv_write_packet_internal(AVFormatContext *s, const AVPacket *pkt)
2273 MatroskaMuxContext *mkv = s->priv_data;
2275 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2276 mkv_track *track = &mkv->tracks[pkt->stream_index];
2277 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2278 int duration = pkt->duration;
2280 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2281 int64_t relative_packet_pos;
2283 if (ts == AV_NOPTS_VALUE) {
2284 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2285 return AVERROR(EINVAL);
2287 ts += track->ts_offset;
2289 if (mkv->cluster_pos != -1) {
2290 int64_t cluster_time = ts - mkv->cluster_pts;
2291 if ((int16_t)cluster_time != cluster_time) {
2292 ret = mkv_end_cluster(s);
2295 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2299 if (mkv->cluster_pos == -1) {
2300 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2303 mkv->cluster_pos = avio_tell(s->pb);
2304 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2305 mkv->cluster_pts = FFMAX(0, ts);
2306 av_log(s, AV_LOG_DEBUG,
2307 "Starting new cluster with timestamp "
2308 "%" PRId64 " at offset %" PRId64 " bytes\n",
2309 mkv->cluster_pts, mkv->cluster_pos);
2311 pb = mkv->cluster_bc;
2313 relative_packet_pos = avio_tell(pb);
2315 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2316 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2319 if (keyframe && IS_SEEKABLE(s->pb, mkv) &&
2320 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2321 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2322 mkv->cluster_pos, relative_packet_pos, -1);
2328 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2329 duration = mkv_write_vtt_blocks(s, pb, pkt);
2331 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2332 mkv_blockgroup_size(pkt->size,
2333 track->track_num_size));
2335 #if FF_API_CONVERGENCE_DURATION
2336 FF_DISABLE_DEPRECATION_WARNINGS
2337 /* For backward compatibility, prefer convergence_duration. */
2338 if (pkt->convergence_duration > 0) {
2339 duration = pkt->convergence_duration;
2341 FF_ENABLE_DEPRECATION_WARNINGS
2343 /* All subtitle blocks are considered to be keyframes. */
2344 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2345 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2346 end_ebml_master(pb, blockgroup);
2349 if (IS_SEEKABLE(s->pb, mkv)) {
2350 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2351 mkv->cluster_pos, relative_packet_pos, duration);
2357 mkv->duration = FFMAX(mkv->duration, ts + duration);
2358 track->duration = FFMAX(track->duration, ts + duration);
2363 static int mkv_write_packet(AVFormatContext *s, const AVPacket *pkt)
2365 MatroskaMuxContext *mkv = s->priv_data;
2366 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2367 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2369 int64_t cluster_time;
2371 int start_new_cluster;
2373 ret = mkv_check_new_extra_data(s, pkt);
2377 if (mkv->cluster_pos != -1) {
2378 if (mkv->tracks[pkt->stream_index].write_dts)
2379 cluster_time = pkt->dts - mkv->cluster_pts;
2381 cluster_time = pkt->pts - mkv->cluster_pts;
2382 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2384 cluster_size = avio_tell(mkv->cluster_bc);
2386 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2387 // WebM DASH specification states that the first block of
2388 // every Cluster has to be a key frame. So for DASH video,
2389 // we only create a Cluster on seeing key frames.
2390 start_new_cluster = keyframe;
2391 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2392 cluster_time > mkv->cluster_time_limit) {
2393 // For DASH audio, we create a Cluster based on cluster_time_limit.
2394 start_new_cluster = 1;
2395 } else if (!mkv->is_dash &&
2396 (cluster_size > mkv->cluster_size_limit ||
2397 cluster_time > mkv->cluster_time_limit ||
2398 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2399 cluster_size > 4 * 1024))) {
2400 start_new_cluster = 1;
2402 start_new_cluster = 0;
2404 if (start_new_cluster) {
2405 ret = mkv_end_cluster(s);
2411 if (!mkv->cluster_pos)
2412 avio_write_marker(s->pb,
2413 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2414 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2416 // check if we have an audio packet cached
2417 if (mkv->cur_audio_pkt.size > 0) {
2418 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2419 av_packet_unref(&mkv->cur_audio_pkt);
2421 av_log(s, AV_LOG_ERROR,
2422 "Could not write cached audio packet ret:%d\n", ret);
2427 // buffer an audio packet to ensure the packet containing the video
2428 // keyframe's timecode is contained in the same cluster for WebM
2429 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2431 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2433 ret = mkv_write_packet_internal(s, pkt);
2437 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2439 MatroskaMuxContext *mkv = s->priv_data;
2442 if (mkv->cluster_pos != -1) {
2443 int ret = mkv_end_cluster(s);
2446 av_log(s, AV_LOG_DEBUG,
2447 "Flushing cluster at offset %" PRIu64 " bytes\n",
2452 return mkv_write_packet(s, pkt);
2455 static int mkv_write_trailer(AVFormatContext *s)
2457 MatroskaMuxContext *mkv = s->priv_data;
2458 AVIOContext *pb = s->pb;
2459 int64_t endpos, ret64;
2462 // check if we have an audio packet cached
2463 if (mkv->cur_audio_pkt.size > 0) {
2464 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2466 av_log(s, AV_LOG_ERROR,
2467 "Could not write cached audio packet ret:%d\n", ret);
2472 if (mkv->cluster_pos != -1) {
2473 ret = end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2474 MATROSKA_ID_CLUSTER, 0, 0, 0);
2479 ret = mkv_write_chapters(s);
2483 if (!IS_SEEKABLE(pb, mkv))
2486 endpos = avio_tell(pb);
2488 if (mkv->cues.num_entries && mkv->reserve_cues_space >= 0) {
2489 AVIOContext *cues = NULL;
2491 int length_size = 0;
2493 ret = start_ebml_master_crc32(&cues, mkv);
2497 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2498 mkv->tracks, s->nb_streams);
2500 ffio_free_dyn_buf(&cues);
2504 if (mkv->reserve_cues_space) {
2505 size = avio_tell(cues);
2506 length_size = ebml_length_size(size);
2507 size += 4 + length_size;
2508 if (mkv->reserve_cues_space < size) {
2509 av_log(s, AV_LOG_WARNING,
2510 "Insufficient space reserved for Cues: "
2511 "%d < %"PRIu64". No Cues will be output.\n",
2512 mkv->reserve_cues_space, size);
2513 ret2 = AVERROR(EINVAL);
2516 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2517 ffio_free_dyn_buf(&cues);
2520 if (mkv->reserve_cues_space == size + 1) {
2521 /* There is no way to reserve a single byte because
2522 * the minimal size of an EBML Void element is 2
2523 * (1 byte ID, 1 byte length field). This problem
2524 * is solved by writing the Cues' length field on
2525 * one byte more than necessary. */
2531 ret = end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2535 if (mkv->reserve_cues_space) {
2536 if (size < mkv->reserve_cues_space)
2537 put_ebml_void(pb, mkv->reserve_cues_space - size);
2539 endpos = avio_tell(pb);
2543 /* Lengths greater than (1ULL << 56) - 1 can't be represented
2544 * via an EBML number, so leave the unknown length field. */
2545 if (endpos - mkv->segment_offset < (1ULL << 56) - 1) {
2546 if ((ret64 = avio_seek(pb, mkv->segment_offset - 8, SEEK_SET)) < 0)
2548 put_ebml_length(pb, endpos - mkv->segment_offset, 8);
2551 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info.pos);
2556 // update the duration
2557 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2558 avio_seek(mkv->info.bc, mkv->duration_offset, SEEK_SET);
2559 put_ebml_float(mkv->info.bc, MATROSKA_ID_DURATION, mkv->duration);
2560 ret = end_ebml_master_crc32(pb, &mkv->info.bc, mkv,
2561 MATROSKA_ID_INFO, 0, 0, 0);
2566 if (mkv->track.bc) {
2567 // write Tracks master
2568 avio_seek(pb, mkv->track.pos, SEEK_SET);
2569 ret = end_ebml_master_crc32(pb, &mkv->track.bc, mkv,
2570 MATROSKA_ID_TRACKS, 0, 0, 0);
2575 // update stream durations
2578 for (i = 0; i < s->nb_streams; ++i) {
2579 const AVStream *st = s->streams[i];
2580 const mkv_track *track = &mkv->tracks[i];
2582 if (track->duration_offset > 0) {
2583 double duration_sec = track->duration * av_q2d(st->time_base);
2584 char duration_string[20] = "";
2586 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2589 avio_seek(mkv->tags.bc, track->duration_offset, SEEK_SET);
2591 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2592 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2593 fmod(duration_sec, 60));
2595 put_ebml_binary(mkv->tags.bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2599 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2600 ret = end_ebml_master_crc32(pb, &mkv->tags.bc, mkv,
2601 MATROSKA_ID_TAGS, 0, 0, 0);
2606 avio_seek(pb, endpos, SEEK_SET);
2611 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2614 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2615 if (ff_mkv_codec_tags[i].id == codec_id)
2618 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2619 enum AVMediaType type = avcodec_get_type(codec_id);
2620 // mkv theoretically supports any video/audio through VFW/ACM
2621 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2628 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2631 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2632 if (ff_webm_codec_tags[i].id == codec_id)
2638 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2643 uid = (uint64_t)av_lfg_get(c) << 32;
2644 uid |= av_lfg_get(c);
2647 for (k = 0; k < i; k++) {
2648 if (tracks[k].uid == uid)
2656 static int mkv_init(struct AVFormatContext *s)
2658 MatroskaMuxContext *mkv = s->priv_data;
2660 unsigned nb_tracks = 0;
2663 for (i = 0; i < s->nb_streams; i++) {
2664 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2665 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2666 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2667 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2668 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2669 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2670 av_log(s, AV_LOG_ERROR,
2671 "The Matroska muxer does not yet support muxing %s\n",
2672 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2673 return AVERROR_PATCHWELCOME;
2677 if (s->avoid_negative_ts < 0) {
2678 s->avoid_negative_ts = 1;
2679 s->internal->avoid_negative_ts_use_pts = 1;
2682 if (!strcmp(s->oformat->name, "webm")) {
2683 mkv->mode = MODE_WEBM;
2686 mkv->mode = MODE_MATROSKAv2;
2688 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2690 return AVERROR(ENOMEM);
2692 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2693 av_lfg_init(&c, av_get_random_seed());
2695 // Calculate the SegmentUID now in order not to waste our random seed.
2696 for (i = 0; i < 4; i++)
2697 mkv->segment_uid[i] = av_lfg_get(&c);
2700 for (i = 0; i < s->nb_streams; i++) {
2701 AVStream *st = s->streams[i];
2702 mkv_track *track = &mkv->tracks[i];
2704 if (s->flags & AVFMT_FLAG_BITEXACT) {
2707 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2710 // ms precision is the de-facto standard timescale for mkv files
2711 avpriv_set_pts_info(st, 64, 1, 1000);
2713 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2714 if (mkv->mode == MODE_WEBM) {
2715 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2716 "as WebM doesn't support attachments.\n", i);
2717 } else if (!get_mimetype(st)) {
2718 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype "
2719 "tag and it cannot be deduced from the codec id.\n", i);
2720 return AVERROR(EINVAL);
2722 mkv->nb_attachments++;
2727 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2728 track->track_num_size = ebml_num_size(track->track_num);
2731 if (mkv->is_dash && nb_tracks != 1)
2732 return AVERROR(EINVAL);
2737 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2740 AVStream *st = s->streams[pkt->stream_index];
2742 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2743 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2744 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2745 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2746 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2752 static const AVCodecTag additional_audio_tags[] = {
2753 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2754 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2755 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2756 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2757 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2758 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2759 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2760 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2761 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2762 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2763 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2764 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2765 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2768 static const AVCodecTag additional_video_tags[] = {
2769 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2770 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2771 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2772 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2775 static const AVCodecTag additional_subtitle_tags[] = {
2776 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2777 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2778 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2779 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2782 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2783 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2784 static const AVOption options[] = {
2785 { "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 },
2786 { "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 },
2787 { "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 },
2788 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2789 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2790 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2791 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2792 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2793 { "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" },
2794 { "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" },
2795 { "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" },
2796 { "passthrough", "Use the disposition flag as-is", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_PASSTHROUGH }, 0, 0, FLAGS, "default_mode" },
2800 #if CONFIG_MATROSKA_MUXER
2801 static const AVClass matroska_class = {
2802 .class_name = "matroska muxer",
2803 .item_name = av_default_item_name,
2805 .version = LIBAVUTIL_VERSION_INT,
2808 AVOutputFormat ff_matroska_muxer = {
2810 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2811 .mime_type = "video/x-matroska",
2812 .extensions = "mkv",
2813 .priv_data_size = sizeof(MatroskaMuxContext),
2814 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2815 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2816 .video_codec = CONFIG_LIBX264_ENCODER ?
2817 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2819 .deinit = mkv_deinit,
2820 .write_header = mkv_write_header,
2821 .write_packet = mkv_write_flush_packet,
2822 .write_trailer = mkv_write_trailer,
2823 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2824 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2825 .codec_tag = (const AVCodecTag* const []){
2826 ff_codec_bmp_tags, ff_codec_wav_tags,
2827 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2829 .subtitle_codec = AV_CODEC_ID_ASS,
2830 .query_codec = mkv_query_codec,
2831 .check_bitstream = mkv_check_bitstream,
2832 .priv_class = &matroska_class,
2836 #if CONFIG_WEBM_MUXER
2837 static const AVClass webm_class = {
2838 .class_name = "webm muxer",
2839 .item_name = av_default_item_name,
2841 .version = LIBAVUTIL_VERSION_INT,
2844 AVOutputFormat ff_webm_muxer = {
2846 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2847 .mime_type = "video/webm",
2848 .extensions = "webm",
2849 .priv_data_size = sizeof(MatroskaMuxContext),
2850 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2851 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2852 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2854 .deinit = mkv_deinit,
2855 .write_header = mkv_write_header,
2856 .write_packet = mkv_write_flush_packet,
2857 .write_trailer = mkv_write_trailer,
2858 .query_codec = webm_query_codec,
2859 .check_bitstream = mkv_check_bitstream,
2860 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2861 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2862 .priv_class = &webm_class,
2866 #if CONFIG_MATROSKA_AUDIO_MUXER
2867 static const AVClass mka_class = {
2868 .class_name = "matroska audio muxer",
2869 .item_name = av_default_item_name,
2871 .version = LIBAVUTIL_VERSION_INT,
2873 AVOutputFormat ff_matroska_audio_muxer = {
2875 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2876 .mime_type = "audio/x-matroska",
2877 .extensions = "mka",
2878 .priv_data_size = sizeof(MatroskaMuxContext),
2879 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2880 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2881 .video_codec = AV_CODEC_ID_NONE,
2883 .deinit = mkv_deinit,
2884 .write_header = mkv_write_header,
2885 .write_packet = mkv_write_flush_packet,
2886 .write_trailer = mkv_write_trailer,
2887 .check_bitstream = mkv_check_bitstream,
2888 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2890 .codec_tag = (const AVCodecTag* const []){
2891 ff_codec_wav_tags, additional_audio_tags, 0
2893 .priv_class = &mka_class,