3 * Copyright (c) 2007 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "avio_internal.h"
29 #include "avlanguage.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/stereo3d.h"
54 #include "libavcodec/xiph.h"
55 #include "libavcodec/mpeg4audio.h"
57 /* Level 1 elements we create a SeekHead entry for:
58 * Info, Tracks, Chapters, Attachments, Tags and Cues */
59 #define MAX_SEEKHEAD_ENTRIES 6
63 DEFAULT_MODE_INFER_NO_SUBS,
64 DEFAULT_MODE_PASSTHROUGH,
67 typedef struct ebml_master {
68 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
69 int sizebytes; ///< how many bytes were reserved for the size
72 typedef struct ebml_stored_master {
77 typedef struct mkv_seekhead_entry {
82 typedef struct mkv_seekhead {
84 mkv_seekhead_entry entries[MAX_SEEKHEAD_ENTRIES];
89 typedef struct mkv_cuepoint {
92 int64_t cluster_pos; ///< offset of the cluster containing the block relative to the segment
93 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
94 int64_t duration; ///< duration of the block according to time base
97 typedef struct mkv_cues {
98 mkv_cuepoint *entries;
102 typedef struct mkv_track {
109 int64_t sample_rate_offset;
110 int64_t last_timestamp;
112 int64_t duration_offset;
113 int64_t codecpriv_offset;
117 #define MODE_MATROSKAv2 0x01
118 #define MODE_WEBM 0x02
120 typedef struct MatroskaMuxContext {
121 const AVClass *class;
123 ebml_stored_master info;
124 ebml_stored_master track;
125 ebml_stored_master tags;
127 int64_t segment_offset;
128 AVIOContext *cluster_bc;
129 int64_t cluster_pos; ///< file offset of the current cluster
131 int64_t duration_offset;
133 mkv_seekhead seekhead;
137 AVPacket cur_audio_pkt;
139 unsigned nb_attachments;
142 int reserve_cues_space;
143 int cluster_size_limit;
145 int64_t cluster_time_limit;
147 int dash_track_number;
151 uint32_t chapter_id_offset;
157 uint32_t segment_uid[4];
158 } MatroskaMuxContext;
160 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
161 * 8 byte for "matroska" doctype string */
162 #define MAX_EBML_HEADER_SIZE 35
164 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
165 * offset, 4 bytes for target EBML ID */
166 #define MAX_SEEKENTRY_SIZE 21
168 /** 4 * (1-byte EBML ID, 1-byte EBML size, 8-byte uint max) */
169 #define MAX_CUETRACKPOS_SIZE 40
171 /** Seek preroll value for opus */
172 #define OPUS_SEEK_PREROLL 80000000
174 static int ebml_id_size(uint32_t id)
176 return (av_log2(id) + 7U) / 8;
179 static void put_ebml_id(AVIOContext *pb, uint32_t id)
181 int i = ebml_id_size(id);
183 avio_w8(pb, (uint8_t)(id >> (i * 8)));
187 * Write an EBML size meaning "unknown size".
189 * @param bytes The number of bytes the size should occupy (maximum: 8).
191 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
193 av_assert0(bytes <= 8);
194 avio_w8(pb, 0x1ff >> bytes);
195 ffio_fill(pb, 0xff, bytes - 1);
199 * Returns how many bytes are needed to represent a number
200 * as EBML variable length integer.
202 static int ebml_num_size(uint64_t num)
212 * Calculate how many bytes are needed to represent the length field
213 * of an EBML element whose payload has a given length.
215 static int ebml_length_size(uint64_t length)
217 return ebml_num_size(length + 1);
221 * Write a number as EBML variable length integer on `bytes` bytes.
222 * `bytes` is taken literally without checking.
224 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
226 num |= 1ULL << bytes * 7;
227 for (int i = bytes - 1; i >= 0; i--)
228 avio_w8(pb, (uint8_t)(num >> i * 8));
232 * Write a length as EBML variable length integer.
234 * @param bytes The number of bytes that need to be used to write the number.
235 * If zero, the minimal number of bytes will be used.
237 static void put_ebml_length(AVIOContext *pb, uint64_t length, int bytes)
239 int needed_bytes = ebml_length_size(length);
241 // sizes larger than this are currently undefined in EBML
242 av_assert0(length < (1ULL << 56) - 1);
245 bytes = needed_bytes;
246 // The bytes needed to write the given size must not exceed
247 // the bytes that we ought to use.
248 av_assert0(bytes >= needed_bytes);
249 put_ebml_num(pb, length, bytes);
253 * Write a (random) UID with fixed size to make the output more deterministic
255 static void put_ebml_uid(AVIOContext *pb, uint32_t elementid, uint64_t uid)
257 put_ebml_id(pb, elementid);
258 put_ebml_length(pb, 8, 0);
262 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
269 put_ebml_id(pb, elementid);
270 put_ebml_length(pb, bytes, 0);
271 for (i = bytes - 1; i >= 0; i--)
272 avio_w8(pb, (uint8_t)(val >> i * 8));
275 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
278 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
283 put_ebml_id(pb, elementid);
284 put_ebml_length(pb, bytes, 0);
285 for (i = bytes - 1; i >= 0; i--)
286 avio_w8(pb, (uint8_t)(val >> i * 8));
289 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
291 put_ebml_id(pb, elementid);
292 put_ebml_length(pb, 8, 0);
293 avio_wb64(pb, av_double2int(val));
296 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
297 const void *buf, int size)
299 put_ebml_id(pb, elementid);
300 put_ebml_length(pb, size, 0);
301 avio_write(pb, buf, size);
304 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
307 put_ebml_binary(pb, elementid, str, strlen(str));
311 * Write a void element of a given size. Useful for reserving space in
312 * the file to be written to later.
314 * @param size The number of bytes to reserve, which must be at least 2.
316 static void put_ebml_void(AVIOContext *pb, int size)
318 av_assert0(size >= 2);
320 put_ebml_id(pb, EBML_ID_VOID);
321 // we need to subtract the length needed to store the size from the
322 // size we need to reserve so 2 cases, we use 8 bytes to store the
323 // size if possible, 1 byte otherwise
326 put_ebml_length(pb, size, 0);
329 put_ebml_length(pb, size, 8);
331 ffio_fill(pb, 0, size);
334 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
335 uint64_t expectedsize)
337 int bytes = expectedsize ? ebml_length_size(expectedsize) : 8;
339 put_ebml_id(pb, elementid);
340 put_ebml_size_unknown(pb, bytes);
341 return (ebml_master) { avio_tell(pb), bytes };
344 static void end_ebml_master(AVIOContext *pb, ebml_master master)
346 int64_t pos = avio_tell(pb);
348 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
350 put_ebml_length(pb, pos - master.pos, master.sizebytes);
351 avio_seek(pb, pos, SEEK_SET);
354 static void mkv_add_seekhead_entry(MatroskaMuxContext *mkv, uint32_t elementid,
357 mkv_seekhead *seekhead = &mkv->seekhead;
359 av_assert1(seekhead->num_entries < MAX_SEEKHEAD_ENTRIES);
361 seekhead->entries[seekhead->num_entries].elementid = elementid;
362 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - mkv->segment_offset;
365 static int start_ebml_master_crc32(AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
369 if (!*dyn_cp && (ret = avio_open_dyn_buf(dyn_cp)) < 0)
373 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
378 static int end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp,
379 MatroskaMuxContext *mkv, uint32_t id,
380 int length_size, int keep_buffer,
383 uint8_t *buf, crc[4];
384 int ret, size, skip = 0;
386 size = avio_get_dyn_buf(*dyn_cp, &buf);
387 if ((ret = (*dyn_cp)->error) < 0)
391 mkv_add_seekhead_entry(mkv, id, avio_tell(pb));
394 put_ebml_length(pb, size, length_size);
395 if (mkv->write_crc) {
396 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
397 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
398 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
400 avio_write(pb, buf + skip, size - skip);
404 ffio_reset_dyn_buf(*dyn_cp);
406 ffio_free_dyn_buf(dyn_cp);
412 * Output EBML master. Keep the buffer if seekable, allowing for later updates.
413 * Furthermore always add a SeekHead Entry for this element.
415 static int end_ebml_master_crc32_tentatively(AVIOContext *pb,
416 ebml_stored_master *elem,
417 MatroskaMuxContext *mkv, uint32_t id)
419 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
421 int size = avio_get_dyn_buf(elem->bc, &buf);
423 if (elem->bc->error < 0)
424 return elem->bc->error;
426 elem->pos = avio_tell(pb);
427 mkv_add_seekhead_entry(mkv, id, elem->pos);
430 put_ebml_length(pb, size, 0);
431 avio_write(pb, buf, size);
435 return end_ebml_master_crc32(pb, &elem->bc, mkv, id, 0, 0, 1);
438 static void put_xiph_size(AVIOContext *pb, int size)
440 ffio_fill(pb, 255, size / 255);
441 avio_w8(pb, size % 255);
445 * Free the members allocated in the mux context.
447 static void mkv_deinit(AVFormatContext *s)
449 MatroskaMuxContext *mkv = s->priv_data;
451 av_packet_unref(&mkv->cur_audio_pkt);
453 ffio_free_dyn_buf(&mkv->cluster_bc);
454 ffio_free_dyn_buf(&mkv->info.bc);
455 ffio_free_dyn_buf(&mkv->track.bc);
456 ffio_free_dyn_buf(&mkv->tags.bc);
458 av_freep(&mkv->cues.entries);
459 av_freep(&mkv->tracks);
463 * Initialize the SeekHead element to be ready to index level 1 Matroska
464 * elements. Enough space to write MAX_SEEKHEAD_ENTRIES SeekHead entries
465 * will be reserved at the current file location.
467 static void mkv_start_seekhead(MatroskaMuxContext *mkv, AVIOContext *pb)
469 mkv->seekhead.filepos = avio_tell(pb);
470 // 21 bytes max for a Seek entry, 6 bytes max for the SeekHead ID
471 // and size, 6 bytes for a CRC32 element, and 2 bytes to guarantee
472 // that an EBML void element will fit afterwards
473 mkv->seekhead.reserved_size = MAX_SEEKHEAD_ENTRIES * MAX_SEEKENTRY_SIZE + 14;
474 put_ebml_void(pb, mkv->seekhead.reserved_size);
478 * Write the SeekHead to the file at the location reserved for it
479 * and seek to destpos afterwards. When error_on_seek_failure
480 * is not set, failure to seek to the position designated for the
481 * SeekHead is not considered an error and it is presumed that
482 * destpos is the current position; failure to seek to destpos
483 * afterwards is always an error.
485 * @return 0 on success, < 0 on error.
487 static int mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv,
488 int error_on_seek_failure, int64_t destpos)
490 AVIOContext *dyn_cp = NULL;
491 mkv_seekhead *seekhead = &mkv->seekhead;
492 int64_t remaining, ret64;
495 if ((ret64 = avio_seek(pb, seekhead->filepos, SEEK_SET)) < 0)
496 return error_on_seek_failure ? ret64 : 0;
498 ret = start_ebml_master_crc32(&dyn_cp, mkv);
502 for (i = 0; i < seekhead->num_entries; i++) {
503 mkv_seekhead_entry *entry = &seekhead->entries[i];
504 ebml_master seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY,
507 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
508 put_ebml_length(dyn_cp, ebml_id_size(entry->elementid), 0);
509 put_ebml_id(dyn_cp, entry->elementid);
511 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
512 end_ebml_master(dyn_cp, seekentry);
514 ret = end_ebml_master_crc32(pb, &dyn_cp, mkv,
515 MATROSKA_ID_SEEKHEAD, 0, 0, 0);
519 remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
520 put_ebml_void(pb, remaining);
522 if ((ret64 = avio_seek(pb, destpos, SEEK_SET)) < 0)
528 static int mkv_add_cuepoint(MatroskaMuxContext *mkv, int stream, int64_t ts,
529 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
531 mkv_cues *cues = &mkv->cues;
532 mkv_cuepoint *entries = cues->entries;
537 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
539 return AVERROR(ENOMEM);
540 cues->entries = entries;
542 cues->entries[cues->num_entries].pts = ts;
543 cues->entries[cues->num_entries].stream_idx = stream;
544 cues->entries[cues->num_entries].cluster_pos = cluster_pos - mkv->segment_offset;
545 cues->entries[cues->num_entries].relative_pos = relative_pos;
546 cues->entries[cues->num_entries++].duration = duration;
551 static int mkv_assemble_cues(AVStream **streams, AVIOContext *dyn_cp,
552 mkv_cues *cues, mkv_track *tracks, int num_tracks)
554 AVIOContext *cuepoint;
557 ret = avio_open_dyn_buf(&cuepoint);
561 for (mkv_cuepoint *entry = cues->entries, *end = entry + cues->num_entries;
563 uint64_t pts = entry->pts;
567 put_ebml_uint(cuepoint, MATROSKA_ID_CUETIME, pts);
569 // put all the entries from different tracks that have the exact same
570 // timestamp into the same CuePoint
571 for (int j = 0; j < num_tracks; j++)
572 tracks[j].has_cue = 0;
574 ebml_master track_positions;
575 int idx = entry->stream_idx;
577 av_assert0(idx >= 0 && idx < num_tracks);
578 if (tracks[idx].has_cue && streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
580 tracks[idx].has_cue = 1;
581 track_positions = start_ebml_master(cuepoint, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
582 put_ebml_uint(cuepoint, MATROSKA_ID_CUETRACK , tracks[idx].track_num);
583 put_ebml_uint(cuepoint, MATROSKA_ID_CUECLUSTERPOSITION , entry->cluster_pos);
584 put_ebml_uint(cuepoint, MATROSKA_ID_CUERELATIVEPOSITION, entry->relative_pos);
585 if (entry->duration != -1)
586 put_ebml_uint(cuepoint, MATROSKA_ID_CUEDURATION , entry->duration);
587 end_ebml_master(cuepoint, track_positions);
588 } while (++entry < end && entry->pts == pts);
589 size = avio_get_dyn_buf(cuepoint, &buf);
590 if ((ret = cuepoint->error) < 0)
592 put_ebml_binary(dyn_cp, MATROSKA_ID_POINTENTRY, buf, size);
593 ffio_reset_dyn_buf(cuepoint);
595 ffio_free_dyn_buf(&cuepoint);
600 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb,
601 const AVCodecParameters *par)
603 const uint8_t *header_start[3];
605 int first_header_size;
608 if (par->codec_id == AV_CODEC_ID_VORBIS)
609 first_header_size = 30;
611 first_header_size = 42;
613 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
614 first_header_size, header_start, header_len) < 0) {
615 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
619 avio_w8(pb, 2); // number packets - 1
620 for (j = 0; j < 2; j++) {
621 put_xiph_size(pb, header_len[j]);
623 for (j = 0; j < 3; j++)
624 avio_write(pb, header_start[j], header_len[j]);
629 static int put_wv_codecpriv(AVIOContext *pb, const AVCodecParameters *par)
631 if (par->extradata && par->extradata_size == 2)
632 avio_write(pb, par->extradata, 2);
634 avio_wl16(pb, 0x410); // fallback to the most recent version
638 static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb,
639 const AVCodecParameters *par)
641 int write_comment = (par->channel_layout &&
642 !(par->channel_layout & ~0x3ffffULL) &&
643 !ff_flac_is_native_layout(par->channel_layout));
644 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
651 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
652 "Lavf" : LIBAVFORMAT_IDENT;
653 AVDictionary *dict = NULL;
657 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
658 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
660 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
661 av_assert1(len < (1 << 24) - 4);
666 ff_vorbiscomment_write(pb, dict, vendor, NULL, 0);
674 static int get_aac_sample_rates(AVFormatContext *s, const uint8_t *extradata,
675 int extradata_size, int *sample_rate,
676 int *output_sample_rate)
678 MPEG4AudioConfig mp4ac;
681 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
682 /* Don't abort if the failure is because of missing extradata. Assume in that
683 * case a bitstream filter will provide the muxer with the extradata in the
685 * Abort however if s->pb is not seekable, as we would not be able to seek back
686 * to write the sample rate elements once the extradata shows up, anyway. */
687 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
688 av_log(s, AV_LOG_ERROR,
689 "Error parsing AAC extradata, unable to determine samplerate.\n");
690 return AVERROR(EINVAL);
694 /* This will only happen when this function is called while writing the
695 * header and no extradata is available. The space for this element has
696 * to be reserved for when this function is called again after the
697 * extradata shows up in the first packet, as there's no way to know if
698 * output_sample_rate will be different than sample_rate or not. */
699 *output_sample_rate = *sample_rate;
701 *sample_rate = mp4ac.sample_rate;
702 *output_sample_rate = mp4ac.ext_sample_rate;
707 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
708 const AVCodecParameters *par,
711 switch (par->codec_id) {
712 case AV_CODEC_ID_VORBIS:
713 case AV_CODEC_ID_THEORA:
714 return put_xiph_codecpriv(s, dyn_cp, par);
715 case AV_CODEC_ID_FLAC:
716 return put_flac_codecpriv(s, dyn_cp, par);
717 case AV_CODEC_ID_WAVPACK:
718 return put_wv_codecpriv(dyn_cp, par);
719 case AV_CODEC_ID_H264:
720 return ff_isom_write_avcc(dyn_cp, par->extradata,
721 par->extradata_size);
722 case AV_CODEC_ID_HEVC:
723 return ff_isom_write_hvcc(dyn_cp, par->extradata,
724 par->extradata_size, 0);
725 case AV_CODEC_ID_AV1:
726 if (par->extradata_size)
727 return ff_isom_write_av1c(dyn_cp, par->extradata,
728 par->extradata_size);
730 put_ebml_void(pb, 4 + 3);
732 case AV_CODEC_ID_ALAC:
733 if (par->extradata_size < 36) {
734 av_log(s, AV_LOG_ERROR,
735 "Invalid extradata found, ALAC expects a 36-byte "
737 return AVERROR_INVALIDDATA;
739 avio_write(dyn_cp, par->extradata + 12,
740 par->extradata_size - 12);
742 case AV_CODEC_ID_AAC:
743 if (par->extradata_size)
744 avio_write(dyn_cp, par->extradata, par->extradata_size);
746 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
749 if (par->codec_id == AV_CODEC_ID_PRORES &&
750 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
751 avio_wl32(dyn_cp, par->codec_tag);
752 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
753 avio_write(dyn_cp, par->extradata, par->extradata_size);
759 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
760 AVCodecParameters *par,
761 int native_id, int qt_id)
765 int ret, codecpriv_size;
767 ret = avio_open_dyn_buf(&dyn_cp);
772 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
773 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
776 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
778 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
779 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
782 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
783 avio_wl32(dyn_cp, par->codec_tag);
784 for(i = 0; i < 0x5a - 8; i++)
787 avio_write(dyn_cp, par->extradata, par->extradata_size);
789 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
790 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
791 avcodec_get_name(par->codec_id));
794 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
796 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
797 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
798 avcodec_get_name(par->codec_id));
799 ret = AVERROR(EINVAL);
802 ff_put_bmp_header(dyn_cp, par, 0, 0);
804 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
806 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
808 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
809 avcodec_get_name(par->codec_id));
810 ret = AVERROR(EINVAL);
813 par->codec_tag = tag;
815 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
819 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
820 if ((ret = dyn_cp->error) >= 0 && codecpriv_size)
821 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
824 ffio_free_dyn_buf(&dyn_cp);
828 static void mkv_write_video_color(AVIOContext *pb, const AVCodecParameters *par,
831 /* 18 Elements with two bytes ID, one byte length field, 8 bytes payload
832 * a master element with two bytes ID and one byte length field
833 * plus another byte to stay clear of the end. */
834 uint8_t colour[(2 + 1 + 8) * 18 + (2 + 1) + 1];
835 AVIOContext buf, *dyn_cp = &buf;
836 int side_data_size = 0;
838 const uint8_t *side_data;
840 ffio_init_context(dyn_cp, colour, sizeof(colour), 1, NULL, NULL, NULL, NULL);
842 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
843 par->color_trc < AVCOL_TRC_NB) {
844 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
847 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
848 par->color_space < AVCOL_SPC_NB) {
849 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
851 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
852 par->color_primaries < AVCOL_PRI_NB) {
853 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
855 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
856 par->color_range < AVCOL_RANGE_NB) {
857 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
859 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
860 par->chroma_location <= AVCHROMA_LOC_TOP) {
863 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
864 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
865 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
868 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
870 if (side_data_size) {
871 const AVContentLightMetadata *metadata =
872 (const AVContentLightMetadata*)side_data;
873 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
874 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
877 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
879 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
880 ebml_master meta_element = start_ebml_master(
881 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 10 * (2 + 1 + 8));
882 const AVMasteringDisplayMetadata *metadata =
883 (const AVMasteringDisplayMetadata*)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);
912 if (colorinfo_size) {
913 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLOR, colour, colorinfo_size);
917 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
920 ebml_master projection;
921 int side_data_size = 0;
924 const AVSphericalMapping *spherical =
925 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
931 if (spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
932 spherical->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
933 spherical->projection != AV_SPHERICAL_CUBEMAP) {
934 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
938 // Maximally 4 8-byte elements with id-length 2 + 1 byte length field
939 // and the private data of the AV_SPHERICAL_EQUIRECTANGULAR_TILE case
940 projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION,
941 4 * (2 + 1 + 8) + (2 + 1 + 20));
943 switch (spherical->projection) {
944 case AV_SPHERICAL_EQUIRECTANGULAR:
945 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
946 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
948 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
949 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
950 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
951 AV_WB32(private, 0); // version + flags
952 AV_WB32(private + 4, spherical->bound_top);
953 AV_WB32(private + 8, spherical->bound_bottom);
954 AV_WB32(private + 12, spherical->bound_left);
955 AV_WB32(private + 16, spherical->bound_right);
956 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
959 case AV_SPHERICAL_CUBEMAP:
960 put_ebml_uint(pb, MATROSKA_ID_VIDEOPROJECTIONTYPE,
961 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
962 AV_WB32(private, 0); // version + flags
963 AV_WB32(private + 4, 0); // layout
964 AV_WB32(private + 8, spherical->padding);
965 put_ebml_binary(pb, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
973 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
974 (double) spherical->yaw / (1 << 16));
975 if (spherical->pitch)
976 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
977 (double) spherical->pitch / (1 << 16));
979 put_ebml_float(pb, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
980 (double) spherical->roll / (1 << 16));
982 end_ebml_master(pb, projection);
987 static void mkv_write_field_order(AVIOContext *pb, int mode,
988 enum AVFieldOrder field_order)
990 switch (field_order) {
991 case AV_FIELD_UNKNOWN:
993 case AV_FIELD_PROGRESSIVE:
994 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
995 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1001 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1002 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1003 if (mode != MODE_WEBM) {
1004 switch (field_order) {
1006 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1007 MATROSKA_VIDEO_FIELDORDER_TT);
1010 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1011 MATROSKA_VIDEO_FIELDORDER_BB);
1014 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1015 MATROSKA_VIDEO_FIELDORDER_TB);
1018 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1019 MATROSKA_VIDEO_FIELDORDER_BT);
1026 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1027 AVStream *st, int mode, int *h_width, int *h_height)
1031 const AVDictionaryEntry *tag;
1032 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1036 // convert metadata into proper side data and add it to the stream
1037 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1038 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1039 int stereo_mode = atoi(tag->value);
1041 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1042 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1047 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1048 stereo_mode != 10 && stereo_mode != 12) {
1049 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1055 // iterate to find the stereo3d side data
1056 for (i = 0; i < st->nb_side_data; i++) {
1057 AVPacketSideData sd = st->side_data[i];
1058 if (sd.type == AV_PKT_DATA_STEREO3D) {
1059 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1061 switch (stereo->type) {
1062 case AV_STEREO3D_2D:
1063 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1065 case AV_STEREO3D_SIDEBYSIDE:
1066 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1067 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1068 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1071 case AV_STEREO3D_TOPBOTTOM:
1072 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1073 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1077 case AV_STEREO3D_CHECKERBOARD:
1078 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1079 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1082 case AV_STEREO3D_LINES:
1083 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1084 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1088 case AV_STEREO3D_COLUMNS:
1089 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1090 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1094 case AV_STEREO3D_FRAMESEQUENCE:
1095 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1096 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1104 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1107 // if webm, do not write unsupported modes
1108 if ((mode == MODE_WEBM &&
1109 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1110 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1111 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1112 av_log(s, AV_LOG_ERROR,
1113 "The specified stereo mode is not valid.\n");
1114 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1115 return AVERROR(EINVAL);
1118 // write StereoMode if format is valid
1119 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1124 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1125 AVStream *st, mkv_track *track, AVIOContext *pb,
1128 AVCodecParameters *par = st->codecpar;
1129 ebml_master subinfo, track_master;
1133 int sample_rate = par->sample_rate;
1134 int output_sample_rate = 0;
1135 int display_width_div = 1;
1136 int display_height_div = 1;
1138 const AVDictionaryEntry *tag;
1140 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1143 if (par->codec_id == AV_CODEC_ID_AAC) {
1144 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1145 &output_sample_rate);
1150 track_master = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1151 put_ebml_uint(pb, MATROSKA_ID_TRACKNUMBER, track->track_num);
1152 put_ebml_uid (pb, MATROSKA_ID_TRACKUID, track->uid);
1153 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGLACING, 0); // no lacing (yet)
1155 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1156 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1157 tag = av_dict_get(st->metadata, "language", NULL, 0);
1158 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE,
1159 tag && tag->value ? tag->value : "und");
1161 // The default value for TRACKFLAGDEFAULT is 1, so add element
1162 // if we need to clear it.
1164 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, 0);
1166 if (st->disposition & AV_DISPOSITION_FORCED)
1167 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1169 if (mkv->mode == MODE_WEBM) {
1170 const char *codec_id;
1171 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1172 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1173 if (ff_webm_codec_tags[j].id == par->codec_id) {
1174 codec_id = ff_webm_codec_tags[j].str;
1179 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1180 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1181 codec_id = "D_WEBVTT/CAPTIONS";
1182 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1183 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1184 codec_id = "D_WEBVTT/DESCRIPTIONS";
1185 native_id = MATROSKA_TRACK_TYPE_METADATA;
1186 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1187 codec_id = "D_WEBVTT/METADATA";
1188 native_id = MATROSKA_TRACK_TYPE_METADATA;
1190 codec_id = "D_WEBVTT/SUBTITLES";
1191 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1196 av_log(s, AV_LOG_ERROR,
1197 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1198 return AVERROR(EINVAL);
1201 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1203 // look for a codec ID string specific to mkv to use,
1204 // if none are found, use AVI codes
1205 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1206 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1207 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1208 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1214 if (mkv->allow_raw_vfw) {
1217 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1218 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1219 return AVERROR(EINVAL);
1224 switch (par->codec_type) {
1225 case AVMEDIA_TYPE_VIDEO:
1226 mkv->have_video = 1;
1227 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1229 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1230 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1231 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1232 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1233 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1234 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1237 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1238 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1239 par->codec_id == AV_CODEC_ID_SVQ1 ||
1240 par->codec_id == AV_CODEC_ID_SVQ3 ||
1241 par->codec_id == AV_CODEC_ID_CINEPAK))
1245 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1246 else if (!native_id) {
1247 // if there is no mkv-specific codec ID, use VFW mode
1248 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1249 track->write_dts = 1;
1250 s->internal->avoid_negative_ts_use_pts = 0;
1253 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1255 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1256 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1258 mkv_write_field_order(pb, mkv->mode, par->field_order);
1260 // check both side data and metadata for stereo information,
1261 // write the result to the bitstream if any is found
1262 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1264 &display_height_div);
1268 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1269 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1270 (par->format == AV_PIX_FMT_YUVA420P)) {
1271 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1274 // write DisplayWidth and DisplayHeight, they contain the size of
1275 // a single source view and/or the display aspect ratio
1276 if (st->sample_aspect_ratio.num) {
1277 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1278 if (d_width > INT_MAX) {
1279 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1280 return AVERROR(EINVAL);
1282 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1283 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1284 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1285 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1287 AVRational display_aspect_ratio;
1288 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1289 par->width * (int64_t)st->sample_aspect_ratio.num,
1290 par->height * (int64_t)st->sample_aspect_ratio.den,
1292 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1293 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1294 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1297 } else if (display_width_div != 1 || display_height_div != 1) {
1298 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1299 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1300 } else if (mkv->mode != MODE_WEBM)
1301 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1303 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1304 uint32_t color_space = av_le2ne32(par->codec_tag);
1305 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1307 mkv_write_video_color(pb, par, st);
1309 ret = mkv_write_video_projection(s, pb, st);
1312 end_ebml_master(pb, subinfo);
1315 case AVMEDIA_TYPE_AUDIO:
1316 if (par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1317 int64_t codecdelay = av_rescale_q(par->initial_padding,
1318 (AVRational){ 1, 48000 },
1319 (AVRational){ 1, 1000000000 });
1320 if (codecdelay < 0) {
1321 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1322 return AVERROR(EINVAL);
1324 // track->ts_offset = av_rescale_q(par->initial_padding,
1325 // (AVRational){ 1, par->sample_rate },
1328 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1330 if (par->codec_id == AV_CODEC_ID_OPUS)
1331 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1333 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1336 // no mkv-specific ID, use ACM mode
1337 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1339 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 6 + 4 * 9);
1340 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1342 track->sample_rate_offset = avio_tell(pb);
1343 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1344 if (output_sample_rate)
1345 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1347 bit_depth = av_get_bits_per_sample(par->codec_id);
1348 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1349 if (par->bits_per_raw_sample)
1350 bit_depth = par->bits_per_raw_sample;
1352 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1355 bit_depth = par->bits_per_coded_sample;
1357 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1358 end_ebml_master(pb, subinfo);
1361 case AVMEDIA_TYPE_SUBTITLE:
1363 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1364 return AVERROR(ENOSYS);
1367 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1368 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1370 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1373 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1374 return AVERROR(EINVAL);
1377 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1378 track->codecpriv_offset = avio_tell(pb);
1379 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1384 end_ebml_master(pb, track_master);
1389 static int mkv_write_tracks(AVFormatContext *s)
1391 MatroskaMuxContext *mkv = s->priv_data;
1392 AVIOContext *pb = s->pb;
1393 int i, ret, video_default_idx, audio_default_idx, subtitle_default_idx;
1395 if (mkv->nb_attachments == s->nb_streams)
1398 ret = start_ebml_master_crc32(&mkv->track.bc, mkv);
1402 if (mkv->default_mode != DEFAULT_MODE_PASSTHROUGH) {
1403 int video_idx, audio_idx, subtitle_idx;
1405 video_idx = video_default_idx =
1406 audio_idx = audio_default_idx =
1407 subtitle_idx = subtitle_default_idx = -1;
1409 for (i = s->nb_streams - 1; i >= 0; i--) {
1410 AVStream *st = s->streams[i];
1412 switch (st->codecpar->codec_type) {
1413 #define CASE(type, variable) \
1414 case AVMEDIA_TYPE_ ## type: \
1415 variable ## _idx = i; \
1416 if (st->disposition & AV_DISPOSITION_DEFAULT) \
1417 variable ## _default_idx = i; \
1421 CASE(SUBTITLE, subtitle)
1426 video_default_idx = FFMAX(video_default_idx, video_idx);
1427 audio_default_idx = FFMAX(audio_default_idx, audio_idx);
1428 if (mkv->default_mode != DEFAULT_MODE_INFER_NO_SUBS)
1429 subtitle_default_idx = FFMAX(subtitle_default_idx, subtitle_idx);
1431 for (i = 0; i < s->nb_streams; i++) {
1432 AVStream *st = s->streams[i];
1433 int is_default = mkv->default_mode == DEFAULT_MODE_PASSTHROUGH ?
1434 st->disposition & AV_DISPOSITION_DEFAULT :
1435 i == video_default_idx || i == audio_default_idx ||
1436 i == subtitle_default_idx;
1437 ret = mkv_write_track(s, mkv, st, &mkv->tracks[i],
1438 mkv->track.bc, is_default);
1443 return end_ebml_master_crc32_tentatively(pb, &mkv->track, mkv,
1444 MATROSKA_ID_TRACKS);
1447 static int mkv_write_chapters(AVFormatContext *s)
1449 MatroskaMuxContext *mkv = s->priv_data;
1450 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1451 ebml_master editionentry;
1452 AVRational scale = {1, 1E9};
1455 if (!s->nb_chapters || mkv->wrote_chapters)
1458 for (i = 0; i < s->nb_chapters; i++)
1459 if (!s->chapters[i]->id) {
1460 mkv->chapter_id_offset = 1;
1464 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1468 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1469 if (mkv->mode != MODE_WEBM)
1470 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1472 for (i = 0; i < s->nb_chapters; i++) {
1473 ebml_master chapteratom, chapterdisplay;
1474 const AVChapter *c = s->chapters[i];
1475 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1476 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1477 const AVDictionaryEntry *t;
1478 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1479 av_log(s, AV_LOG_ERROR,
1480 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1481 chapterstart, chapterend);
1482 ffio_free_dyn_buf(&dyn_cp);
1483 return AVERROR_INVALIDDATA;
1486 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1487 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID,
1488 (uint32_t)c->id + (uint64_t)mkv->chapter_id_offset);
1489 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1490 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1491 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1492 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1493 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1494 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1495 end_ebml_master(dyn_cp, chapterdisplay);
1497 end_ebml_master(dyn_cp, chapteratom);
1499 end_ebml_master(dyn_cp, editionentry);
1500 mkv->wrote_chapters = 1;
1502 return end_ebml_master_crc32(pb, &dyn_cp, mkv,
1503 MATROSKA_ID_CHAPTERS, 0, 0, 1);
1506 static int mkv_write_simpletag(AVIOContext *pb, const AVDictionaryEntry *t)
1508 uint8_t *key = av_strdup(t->key);
1510 const uint8_t *lang = NULL;
1514 return AVERROR(ENOMEM);
1516 if ((p = strrchr(p, '-')) &&
1517 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1524 else if (*p >= 'a' && *p <= 'z')
1529 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1530 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1532 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1533 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1534 end_ebml_master(pb, tag);
1540 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1541 uint64_t uid, ebml_master *tag)
1544 MatroskaMuxContext *mkv = s->priv_data;
1545 ebml_master targets;
1548 if (!mkv->tags.bc) {
1549 ret = start_ebml_master_crc32(&mkv->tags.bc, mkv);
1555 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1556 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 4 + 1 + 8);
1558 put_ebml_uid(pb, elementid, uid);
1559 end_ebml_master(pb, targets);
1563 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1565 return av_strcasecmp(name, "title") &&
1566 av_strcasecmp(name, "stereo_mode") &&
1567 av_strcasecmp(name, "creation_time") &&
1568 av_strcasecmp(name, "encoding_tool") &&
1569 av_strcasecmp(name, "duration") &&
1570 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1571 av_strcasecmp(name, "language")) &&
1572 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1573 (av_strcasecmp(name, "filename") &&
1574 av_strcasecmp(name, "mimetype")));
1577 static int mkv_write_tag(AVFormatContext *s, const AVDictionary *m,
1578 uint32_t elementid, uint64_t uid, ebml_master *tag)
1580 MatroskaMuxContext *mkv = s->priv_data;
1581 const AVDictionaryEntry *t = NULL;
1585 ret = mkv_write_tag_targets(s, elementid, uid, tag ? tag : &tag2);
1589 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1590 if (mkv_check_tag_name(t->key, elementid)) {
1591 ret = mkv_write_simpletag(mkv->tags.bc, t);
1598 end_ebml_master(mkv->tags.bc, tag2);
1603 static int mkv_check_tag(const AVDictionary *m, uint32_t elementid)
1605 const AVDictionaryEntry *t = NULL;
1607 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1608 if (mkv_check_tag_name(t->key, elementid))
1614 static int mkv_write_tags(AVFormatContext *s)
1616 MatroskaMuxContext *mkv = s->priv_data;
1617 ebml_master tag, *tagp;
1620 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1622 if (mkv_check_tag(s->metadata, 0)) {
1623 ret = mkv_write_tag(s, s->metadata, 0, 0, NULL);
1628 tagp = (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live ? &tag : NULL;
1629 for (i = 0; i < s->nb_streams; i++) {
1630 const AVStream *st = s->streams[i];
1631 mkv_track *track = &mkv->tracks[i];
1633 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1636 if (!tagp && !mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1639 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID,
1645 AVIOContext *pb = mkv->tags.bc;
1646 ebml_master simpletag;
1648 simpletag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG,
1650 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1651 track->duration_offset = avio_tell(pb);
1653 // Reserve space to write duration as a 20-byte string.
1654 // 2 (ebml id) + 1 (data size) + 20 (data)
1655 put_ebml_void(pb, 23);
1656 end_ebml_master(pb, simpletag);
1657 end_ebml_master(pb, tag);
1661 if (mkv->mode != MODE_WEBM) {
1662 for (i = 0; i < s->nb_chapters; i++) {
1663 AVChapter *ch = s->chapters[i];
1665 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1668 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID,
1669 (uint32_t)ch->id + (uint64_t)mkv->chapter_id_offset,
1676 if (mkv->nb_attachments && mkv->mode != MODE_WEBM) {
1677 for (i = 0; i < s->nb_streams; i++) {
1678 const mkv_track *track = &mkv->tracks[i];
1679 const AVStream *st = s->streams[i];
1681 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1684 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1687 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID,
1695 return end_ebml_master_crc32_tentatively(s->pb, &mkv->tags, mkv,
1701 static const char *get_mimetype(const AVStream *st)
1703 const AVDictionaryEntry *t;
1705 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1707 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
1708 const AVCodecDescriptor *desc = avcodec_descriptor_get(st->codecpar->codec_id);
1709 if (desc && desc->mime_types) {
1710 return desc->mime_types[0];
1711 } else if (st->codecpar->codec_id == AV_CODEC_ID_TEXT)
1712 return "text/plain";
1718 static int mkv_write_attachments(AVFormatContext *s)
1720 MatroskaMuxContext *mkv = s->priv_data;
1721 AVIOContext *dyn_cp = NULL, *pb = s->pb;
1724 if (!mkv->nb_attachments)
1727 ret = start_ebml_master_crc32(&dyn_cp, mkv);
1731 for (i = 0; i < s->nb_streams; i++) {
1732 const AVStream *st = s->streams[i];
1733 mkv_track *track = &mkv->tracks[i];
1734 ebml_master attached_file;
1735 const AVDictionaryEntry *t;
1736 const char *mimetype;
1738 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1741 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1743 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1744 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1745 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1746 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1747 return AVERROR(EINVAL);
1749 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1751 mimetype = get_mimetype(st);
1752 av_assert0(mimetype);
1753 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1754 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1755 put_ebml_uid(dyn_cp, MATROSKA_ID_FILEUID, track->uid);
1756 end_ebml_master(dyn_cp, attached_file);
1758 return end_ebml_master_crc32(pb, &dyn_cp, mkv,
1759 MATROSKA_ID_ATTACHMENTS, 0, 0, 1);
1762 static int64_t get_metadata_duration(AVFormatContext *s)
1764 const AVDictionaryEntry *duration = av_dict_get(s->metadata, "DURATION",
1769 if (duration && (av_parse_time(&us, duration->value, 1) == 0) && us > 0) {
1770 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1774 for (unsigned i = 0; i < s->nb_streams; i++) {
1776 duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1778 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1779 max = FFMAX(max, us);
1782 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1786 static int mkv_write_header(AVFormatContext *s)
1788 MatroskaMuxContext *mkv = s->priv_data;
1789 AVIOContext *pb = s->pb;
1790 ebml_master ebml_header;
1791 const AVDictionaryEntry *tag;
1792 int ret, i, version = 2;
1793 int64_t creation_time;
1795 if (mkv->mode != MODE_WEBM ||
1796 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1797 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1800 for (i = 0; i < s->nb_streams; i++) {
1801 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1802 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1803 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1807 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1808 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1809 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1810 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1811 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1812 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1813 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1814 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1815 end_ebml_master(pb, ebml_header);
1817 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1818 mkv->segment_offset = avio_tell(pb);
1820 // we write a seek head at the beginning to point to all other level
1821 // one elements (except Clusters).
1822 mkv_start_seekhead(mkv, pb);
1824 ret = start_ebml_master_crc32(&mkv->info.bc, mkv);
1829 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1830 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1831 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1832 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1833 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1834 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1835 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1837 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1839 if (mkv->mode != MODE_WEBM)
1840 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, mkv->segment_uid, 16);
1842 const char *ident = "Lavf";
1843 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1844 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1847 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1848 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1849 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1850 uint8_t date_utc_buf[8];
1851 AV_WB64(date_utc_buf, date_utc);
1852 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1855 // reserve space for the duration
1857 mkv->duration_offset = avio_tell(pb);
1858 if (!mkv->is_live) {
1859 int64_t metadata_duration = get_metadata_duration(s);
1861 if (s->duration > 0) {
1862 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1863 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1864 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1865 } else if (metadata_duration > 0) {
1866 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1867 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1868 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1870 put_ebml_void(pb, 11); // assumes double-precision float to be written
1873 ret = end_ebml_master_crc32_tentatively(s->pb, &mkv->info,
1874 mkv, MATROSKA_ID_INFO);
1879 ret = mkv_write_tracks(s);
1883 ret = mkv_write_chapters(s);
1887 if (mkv->mode != MODE_WEBM) {
1888 ret = mkv_write_attachments(s);
1893 /* Must come after mkv_write_chapters() because of chapter_id_offset */
1894 ret = mkv_write_tags(s);
1898 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || mkv->is_live) {
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 ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1911 mkv->cues_pos = avio_tell(pb);
1912 if (mkv->reserve_cues_space == 1)
1913 mkv->reserve_cues_space++;
1914 put_ebml_void(pb, mkv->reserve_cues_space);
1917 av_init_packet(&mkv->cur_audio_pkt);
1918 mkv->cur_audio_pkt.size = 0;
1919 mkv->cluster_pos = -1;
1921 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1922 // after 4k and on a keyframe
1923 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
1924 if (mkv->cluster_time_limit < 0)
1925 mkv->cluster_time_limit = 5000;
1926 if (mkv->cluster_size_limit < 0)
1927 mkv->cluster_size_limit = 5 * 1024 * 1024;
1929 if (mkv->cluster_time_limit < 0)
1930 mkv->cluster_time_limit = 1000;
1931 if (mkv->cluster_size_limit < 0)
1932 mkv->cluster_size_limit = 32 * 1024;
1938 static int mkv_blockgroup_size(int pkt_size, int track_num_size)
1940 int size = pkt_size + track_num_size + 3;
1941 size += ebml_length_size(size);
1942 size += 2; // EBML ID for block and block duration
1943 size += 9; // max size of block duration incl. length field
1947 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1954 dst = av_malloc(srclen);
1956 return AVERROR(ENOMEM);
1958 while (srclen >= WV_HEADER_SIZE) {
1961 ret = ff_wv_parse_header(&header, src);
1964 src += WV_HEADER_SIZE;
1965 srclen -= WV_HEADER_SIZE;
1967 if (srclen < header.blocksize) {
1968 ret = AVERROR_INVALIDDATA;
1972 if (header.initial) {
1973 AV_WL32(dst + offset, header.samples);
1976 AV_WL32(dst + offset, header.flags);
1977 AV_WL32(dst + offset + 4, header.crc);
1980 if (!(header.initial && header.final)) {
1981 AV_WL32(dst + offset, header.blocksize);
1985 memcpy(dst + offset, src, header.blocksize);
1986 src += header.blocksize;
1987 srclen -= header.blocksize;
1988 offset += header.blocksize;
2000 static int mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2001 uint32_t blockid, const AVPacket *pkt, int keyframe)
2003 MatroskaMuxContext *mkv = s->priv_data;
2004 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2005 mkv_track *track = &mkv->tracks[pkt->stream_index];
2006 uint8_t *data = NULL, *side_data = NULL;
2007 int err = 0, offset = 0, size = pkt->size, side_data_size = 0;
2008 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2009 uint64_t additional_id;
2010 int64_t discard_padding = 0;
2011 unsigned track_number = track->track_num;
2012 ebml_master block_group, block_additions, block_more;
2014 ts += track->ts_offset;
2016 /* The following string is identical to the one in mkv_write_vtt_blocks
2017 * so that only one copy needs to exist in binaries. */
2018 av_log(s, AV_LOG_DEBUG,
2019 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2020 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2021 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2022 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2023 mkv->cluster_pos, track_number, keyframe != 0);
2025 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2026 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2027 err = ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2028 } else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2029 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) {
2030 /* extradata is Annex B, assume the bitstream is too and convert it */
2031 err = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2032 } else if (par->codec_id == AV_CODEC_ID_AV1) {
2033 err = ff_av1_filter_obus_buf(pkt->data, &data, &size, &offset);
2034 } else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2035 err = mkv_strip_wavpack(pkt->data, &data, &size);
2040 av_log(s, AV_LOG_ERROR, "Error when reformatting data of "
2041 "a packet from stream %d.\n", pkt->stream_index);
2045 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2046 /* Matroska specification requires to remove the first QuickTime atom
2052 side_data = av_packet_get_side_data(pkt,
2053 AV_PKT_DATA_SKIP_SAMPLES,
2055 if (side_data && side_data_size >= 10) {
2056 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2057 (AVRational){1, par->sample_rate},
2058 (AVRational){1, 1000000000});
2061 side_data = av_packet_get_side_data(pkt,
2062 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2065 // Only the Codec-specific BlockMore (id == 1) is currently supported.
2066 if (side_data_size < 8 || (additional_id = AV_RB64(side_data)) != 1) {
2070 side_data_size -= 8;
2074 if (side_data_size || discard_padding) {
2075 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2076 blockid = MATROSKA_ID_BLOCK;
2079 put_ebml_id(pb, blockid);
2080 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2081 put_ebml_num(pb, track_number, track->track_num_size);
2082 avio_wb16(pb, ts - mkv->cluster_pts);
2083 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2084 avio_write(pb, data + offset, size);
2085 if (data != pkt->data)
2088 if (blockid == MATROSKA_ID_BLOCK && !keyframe)
2089 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp - ts);
2090 track->last_timestamp = ts;
2092 if (discard_padding)
2093 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2095 if (side_data_size) {
2096 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2097 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2098 /* Until dbc50f8a our demuxer used a wrong default value
2099 * of BlockAddID, so we write it unconditionally. */
2100 put_ebml_uint (pb, MATROSKA_ID_BLOCKADDID, additional_id);
2101 put_ebml_binary(pb, MATROSKA_ID_BLOCKADDITIONAL,
2102 side_data, side_data_size);
2103 end_ebml_master(pb, block_more);
2104 end_ebml_master(pb, block_additions);
2106 if (side_data_size || discard_padding)
2107 end_ebml_master(pb, block_group);
2112 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, const AVPacket *pkt)
2114 MatroskaMuxContext *mkv = s->priv_data;
2115 mkv_track *track = &mkv->tracks[pkt->stream_index];
2116 ebml_master blockgroup;
2117 int id_size, settings_size, size;
2118 uint8_t *id, *settings;
2119 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2120 const int flags = 0;
2123 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2127 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2130 size = id_size + 1 + settings_size + 1 + pkt->size;
2132 /* The following string is identical to the one in mkv_write_block so that
2133 * only one copy needs to exist in binaries. */
2134 av_log(s, AV_LOG_DEBUG,
2135 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2136 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2137 "at offset %" PRId64 ". TrackNumber %u, keyframe %d\n",
2138 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2139 mkv->cluster_pos, track->track_num, 1);
2141 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2142 mkv_blockgroup_size(size, track->track_num_size));
2144 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2145 put_ebml_length(pb, size + track->track_num_size + 3, 0);
2146 put_ebml_num(pb, track->track_num, track->track_num_size);
2147 avio_wb16(pb, ts - mkv->cluster_pts);
2149 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2151 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2152 end_ebml_master(pb, blockgroup);
2154 return pkt->duration;
2157 static int mkv_end_cluster(AVFormatContext *s)
2159 MatroskaMuxContext *mkv = s->priv_data;
2162 if (!mkv->have_video) {
2163 for (unsigned i = 0; i < s->nb_streams; i++)
2164 mkv->tracks[i].has_cue = 0;
2166 mkv->cluster_pos = -1;
2167 ret = end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv,
2168 MATROSKA_ID_CLUSTER, 0, 1, 0);
2172 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
2176 static int mkv_check_new_extra_data(AVFormatContext *s, const AVPacket *pkt)
2178 MatroskaMuxContext *mkv = s->priv_data;
2179 mkv_track *track = &mkv->tracks[pkt->stream_index];
2180 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2182 int side_data_size = 0, ret;
2184 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2187 switch (par->codec_id) {
2188 case AV_CODEC_ID_AAC:
2189 if (side_data_size && mkv->track.bc) {
2190 int filler, output_sample_rate = 0;
2191 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2192 &output_sample_rate);
2195 if (!output_sample_rate)
2196 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2197 ret = ff_alloc_extradata(par, side_data_size);
2200 memcpy(par->extradata, side_data, side_data_size);
2201 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2202 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2203 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->track.bc) - track->codecpriv_offset);
2205 put_ebml_void(mkv->track.bc, filler);
2206 avio_seek(mkv->track.bc, track->sample_rate_offset, SEEK_SET);
2207 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2208 put_ebml_float(mkv->track.bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2209 } else if (!par->extradata_size && !track->sample_rate) {
2210 // No extradata (codecpar or packet side data).
2211 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2212 return AVERROR(EINVAL);
2215 case AV_CODEC_ID_FLAC:
2216 if (side_data_size && mkv->track.bc) {
2217 uint8_t *old_extradata = par->extradata;
2218 if (side_data_size != par->extradata_size) {
2219 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2221 return AVERROR(EINVAL);
2223 par->extradata = side_data;
2224 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2225 mkv_write_codecprivate(s, mkv->track.bc, par, 1, 0);
2226 par->extradata = old_extradata;
2229 // FIXME: Remove the following once libaom starts propagating extradata during init()
2230 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2231 case AV_CODEC_ID_AV1:
2232 if (side_data_size && mkv->track.bc && !par->extradata_size) {
2233 AVIOContext *dyn_cp;
2236 ret = avio_open_dyn_buf(&dyn_cp);
2239 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2240 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
2241 if ((ret = dyn_cp->error) < 0 ||
2242 !codecpriv_size && (ret = AVERROR_INVALIDDATA)) {
2243 ffio_free_dyn_buf(&dyn_cp);
2246 avio_seek(mkv->track.bc, track->codecpriv_offset, SEEK_SET);
2247 // Do not write the OBUs as we don't have space saved for them
2248 put_ebml_binary(mkv->track.bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2249 ffio_free_dyn_buf(&dyn_cp);
2250 ret = ff_alloc_extradata(par, side_data_size);
2253 memcpy(par->extradata, side_data, side_data_size);
2254 } else if (!par->extradata_size)
2255 return AVERROR_INVALIDDATA;
2259 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2266 static int mkv_write_packet_internal(AVFormatContext *s, const AVPacket *pkt)
2268 MatroskaMuxContext *mkv = s->priv_data;
2270 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2271 mkv_track *track = &mkv->tracks[pkt->stream_index];
2272 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2273 int duration = pkt->duration;
2275 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2276 int64_t relative_packet_pos;
2278 if (ts == AV_NOPTS_VALUE) {
2279 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2280 return AVERROR(EINVAL);
2282 ts += track->ts_offset;
2284 if (mkv->cluster_pos != -1) {
2285 int64_t cluster_time = ts - mkv->cluster_pts;
2286 if ((int16_t)cluster_time != cluster_time) {
2287 ret = mkv_end_cluster(s);
2290 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2294 if (mkv->cluster_pos == -1) {
2295 ret = start_ebml_master_crc32(&mkv->cluster_bc, mkv);
2298 mkv->cluster_pos = avio_tell(s->pb);
2299 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2300 mkv->cluster_pts = FFMAX(0, ts);
2301 av_log(s, AV_LOG_DEBUG,
2302 "Starting new cluster with timestamp "
2303 "%" PRId64 " at offset %" PRId64 " bytes\n",
2304 mkv->cluster_pts, mkv->cluster_pos);
2306 pb = mkv->cluster_bc;
2308 relative_packet_pos = avio_tell(pb);
2310 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2311 ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2314 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
2315 (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
2316 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2317 mkv->cluster_pos, relative_packet_pos, -1);
2323 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2324 duration = mkv_write_vtt_blocks(s, pb, pkt);
2326 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2327 mkv_blockgroup_size(pkt->size,
2328 track->track_num_size));
2330 #if FF_API_CONVERGENCE_DURATION
2331 FF_DISABLE_DEPRECATION_WARNINGS
2332 /* For backward compatibility, prefer convergence_duration. */
2333 if (pkt->convergence_duration > 0) {
2334 duration = pkt->convergence_duration;
2336 FF_ENABLE_DEPRECATION_WARNINGS
2338 /* All subtitle blocks are considered to be keyframes. */
2339 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2340 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2341 end_ebml_master(pb, blockgroup);
2344 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2345 ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
2346 mkv->cluster_pos, relative_packet_pos, duration);
2352 mkv->duration = FFMAX(mkv->duration, ts + duration);
2353 track->duration = FFMAX(track->duration, ts + duration);
2358 static int mkv_write_packet(AVFormatContext *s, const AVPacket *pkt)
2360 MatroskaMuxContext *mkv = s->priv_data;
2361 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2362 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2364 int64_t cluster_time;
2366 int start_new_cluster;
2368 ret = mkv_check_new_extra_data(s, pkt);
2372 if (mkv->cluster_pos != -1) {
2373 if (mkv->tracks[pkt->stream_index].write_dts)
2374 cluster_time = pkt->dts - mkv->cluster_pts;
2376 cluster_time = pkt->pts - mkv->cluster_pts;
2377 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2379 cluster_size = avio_tell(mkv->cluster_bc);
2381 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2382 // WebM DASH specification states that the first block of
2383 // every Cluster has to be a key frame. So for DASH video,
2384 // we only create a Cluster on seeing key frames.
2385 start_new_cluster = keyframe;
2386 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2387 cluster_time > mkv->cluster_time_limit) {
2388 // For DASH audio, we create a Cluster based on cluster_time_limit.
2389 start_new_cluster = 1;
2390 } else if (!mkv->is_dash &&
2391 (cluster_size > mkv->cluster_size_limit ||
2392 cluster_time > mkv->cluster_time_limit ||
2393 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2394 cluster_size > 4 * 1024))) {
2395 start_new_cluster = 1;
2397 start_new_cluster = 0;
2399 if (start_new_cluster) {
2400 ret = mkv_end_cluster(s);
2406 if (!mkv->cluster_pos)
2407 avio_write_marker(s->pb,
2408 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2409 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2411 // check if we have an audio packet cached
2412 if (mkv->cur_audio_pkt.size > 0) {
2413 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2414 av_packet_unref(&mkv->cur_audio_pkt);
2416 av_log(s, AV_LOG_ERROR,
2417 "Could not write cached audio packet ret:%d\n", ret);
2422 // buffer an audio packet to ensure the packet containing the video
2423 // keyframe's timecode is contained in the same cluster for WebM
2424 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2426 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2428 ret = mkv_write_packet_internal(s, pkt);
2432 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2434 MatroskaMuxContext *mkv = s->priv_data;
2437 if (mkv->cluster_pos != -1) {
2438 int ret = mkv_end_cluster(s);
2441 av_log(s, AV_LOG_DEBUG,
2442 "Flushing cluster at offset %" PRIu64 " bytes\n",
2447 return mkv_write_packet(s, pkt);
2450 static int mkv_write_trailer(AVFormatContext *s)
2452 MatroskaMuxContext *mkv = s->priv_data;
2453 AVIOContext *pb = s->pb;
2456 // check if we have an audio packet cached
2457 if (mkv->cur_audio_pkt.size > 0) {
2458 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
2460 av_log(s, AV_LOG_ERROR,
2461 "Could not write cached audio packet ret:%d\n", ret);
2466 if (mkv->cluster_pos != -1) {
2467 ret = end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv,
2468 MATROSKA_ID_CLUSTER, 0, 0, 0);
2473 ret = mkv_write_chapters(s);
2478 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2479 int64_t endpos, ret64;
2481 endpos = avio_tell(pb);
2483 if (mkv->cues.num_entries) {
2484 AVIOContext *cues = NULL;
2486 int length_size = 0;
2488 ret = start_ebml_master_crc32(&cues, mkv);
2492 ret = mkv_assemble_cues(s->streams, cues, &mkv->cues,
2493 mkv->tracks, s->nb_streams);
2495 ffio_free_dyn_buf(&cues);
2499 if (mkv->reserve_cues_space) {
2500 size = avio_tell(cues);
2501 length_size = ebml_length_size(size);
2502 size += 4 + length_size;
2503 if (mkv->reserve_cues_space < size) {
2504 av_log(s, AV_LOG_WARNING,
2505 "Insufficient space reserved for Cues: "
2506 "%d < %"PRIu64". No Cues will be output.\n",
2507 mkv->reserve_cues_space, size);
2508 mkv->reserve_cues_space = -1;
2509 ffio_free_dyn_buf(&cues);
2512 if ((ret64 = avio_seek(pb, mkv->cues_pos, SEEK_SET)) < 0) {
2513 ffio_free_dyn_buf(&cues);
2516 if (mkv->reserve_cues_space == size + 1) {
2517 /* There is no way to reserve a single byte because
2518 * the minimal size of an EBML Void element is 2
2519 * (1 byte ID, 1 byte length field). This problem
2520 * is solved by writing the Cues' length field on
2521 * one byte more than necessary. */
2527 ret = end_ebml_master_crc32(pb, &cues, mkv, MATROSKA_ID_CUES,
2531 if (mkv->reserve_cues_space) {
2532 if (size < mkv->reserve_cues_space)
2533 put_ebml_void(pb, mkv->reserve_cues_space - size);
2535 endpos = avio_tell(pb);
2539 ret = mkv_write_seekhead(pb, mkv, 1, mkv->info.pos);
2544 // update the duration
2545 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2546 avio_seek(mkv->info.bc, mkv->duration_offset, SEEK_SET);
2547 put_ebml_float(mkv->info.bc, MATROSKA_ID_DURATION, mkv->duration);
2548 ret = end_ebml_master_crc32(pb, &mkv->info.bc, mkv,
2549 MATROSKA_ID_INFO, 0, 0, 0);
2554 if (mkv->track.bc) {
2555 // write Tracks master
2556 avio_seek(pb, mkv->track.pos, SEEK_SET);
2557 ret = end_ebml_master_crc32(pb, &mkv->track.bc, mkv,
2558 MATROSKA_ID_TRACKS, 0, 0, 0);
2563 // update stream durations
2566 for (i = 0; i < s->nb_streams; ++i) {
2567 const AVStream *st = s->streams[i];
2568 const mkv_track *track = &mkv->tracks[i];
2570 if (track->duration_offset > 0) {
2571 double duration_sec = track->duration * av_q2d(st->time_base);
2572 char duration_string[20] = "";
2574 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2577 avio_seek(mkv->tags.bc, track->duration_offset, SEEK_SET);
2579 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2580 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2581 fmod(duration_sec, 60));
2583 put_ebml_binary(mkv->tags.bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2587 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2588 ret = end_ebml_master_crc32(pb, &mkv->tags.bc, mkv,
2589 MATROSKA_ID_TAGS, 0, 0, 0);
2594 avio_seek(pb, endpos, SEEK_SET);
2598 end_ebml_master(pb, mkv->segment);
2600 return mkv->reserve_cues_space < 0 ? AVERROR(EINVAL) : 0;
2603 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2606 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2607 if (ff_mkv_codec_tags[i].id == codec_id)
2610 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2611 enum AVMediaType type = avcodec_get_type(codec_id);
2612 // mkv theoretically supports any video/audio through VFW/ACM
2613 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2620 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2623 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2624 if (ff_webm_codec_tags[i].id == codec_id)
2630 static uint64_t mkv_get_uid(const mkv_track *tracks, int i, AVLFG *c)
2635 uid = (uint64_t)av_lfg_get(c) << 32;
2636 uid |= av_lfg_get(c);
2639 for (k = 0; k < i; k++) {
2640 if (tracks[k].uid == uid)
2648 static int mkv_init(struct AVFormatContext *s)
2650 MatroskaMuxContext *mkv = s->priv_data;
2652 unsigned nb_tracks = 0;
2655 for (i = 0; i < s->nb_streams; i++) {
2656 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2657 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2658 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2659 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2660 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2661 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2662 av_log(s, AV_LOG_ERROR,
2663 "The Matroska muxer does not yet support muxing %s\n",
2664 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2665 return AVERROR_PATCHWELCOME;
2669 if (s->avoid_negative_ts < 0) {
2670 s->avoid_negative_ts = 1;
2671 s->internal->avoid_negative_ts_use_pts = 1;
2674 if (!strcmp(s->oformat->name, "webm")) {
2675 mkv->mode = MODE_WEBM;
2678 mkv->mode = MODE_MATROSKAv2;
2680 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
2682 return AVERROR(ENOMEM);
2684 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
2685 av_lfg_init(&c, av_get_random_seed());
2687 // Calculate the SegmentUID now in order not to waste our random seed.
2688 for (i = 0; i < 4; i++)
2689 mkv->segment_uid[i] = av_lfg_get(&c);
2692 for (i = 0; i < s->nb_streams; i++) {
2693 AVStream *st = s->streams[i];
2694 mkv_track *track = &mkv->tracks[i];
2696 if (s->flags & AVFMT_FLAG_BITEXACT) {
2699 track->uid = mkv_get_uid(mkv->tracks, i, &c);
2702 // ms precision is the de-facto standard timescale for mkv files
2703 avpriv_set_pts_info(st, 64, 1, 1000);
2705 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
2706 if (mkv->mode == MODE_WEBM) {
2707 av_log(s, AV_LOG_WARNING, "Stream %d will be ignored "
2708 "as WebM doesn't support attachments.\n", i);
2709 } else if (!get_mimetype(st)) {
2710 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype "
2711 "tag and it cannot be deduced from the codec id.\n", i);
2712 return AVERROR(EINVAL);
2714 mkv->nb_attachments++;
2719 track->track_num = mkv->is_dash ? mkv->dash_track_number : nb_tracks;
2720 track->track_num_size = ebml_num_size(track->track_num);
2723 if (mkv->is_dash && nb_tracks != 1)
2724 return AVERROR(EINVAL);
2729 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2732 AVStream *st = s->streams[pkt->stream_index];
2734 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2735 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2736 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2737 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2738 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2744 static const AVCodecTag additional_audio_tags[] = {
2745 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2746 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2747 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2748 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2749 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2750 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2751 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2752 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2753 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2754 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2755 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2756 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2757 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2760 static const AVCodecTag additional_video_tags[] = {
2761 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2762 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2763 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2764 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2767 static const AVCodecTag additional_subtitle_tags[] = {
2768 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2769 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2770 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2771 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2774 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2775 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2776 static const AVOption options[] = {
2777 { "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 },
2778 { "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 },
2779 { "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 },
2780 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2781 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
2782 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2783 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2784 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2785 { "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" },
2786 { "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" },
2787 { "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" },
2788 { "passthrough", "Use the disposition flag as-is", 0, AV_OPT_TYPE_CONST, { .i64 = DEFAULT_MODE_PASSTHROUGH }, 0, 0, FLAGS, "default_mode" },
2792 #if CONFIG_MATROSKA_MUXER
2793 static const AVClass matroska_class = {
2794 .class_name = "matroska muxer",
2795 .item_name = av_default_item_name,
2797 .version = LIBAVUTIL_VERSION_INT,
2800 AVOutputFormat ff_matroska_muxer = {
2802 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2803 .mime_type = "video/x-matroska",
2804 .extensions = "mkv",
2805 .priv_data_size = sizeof(MatroskaMuxContext),
2806 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2807 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2808 .video_codec = CONFIG_LIBX264_ENCODER ?
2809 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2811 .deinit = mkv_deinit,
2812 .write_header = mkv_write_header,
2813 .write_packet = mkv_write_flush_packet,
2814 .write_trailer = mkv_write_trailer,
2815 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2816 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2817 .codec_tag = (const AVCodecTag* const []){
2818 ff_codec_bmp_tags, ff_codec_wav_tags,
2819 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2821 .subtitle_codec = AV_CODEC_ID_ASS,
2822 .query_codec = mkv_query_codec,
2823 .check_bitstream = mkv_check_bitstream,
2824 .priv_class = &matroska_class,
2828 #if CONFIG_WEBM_MUXER
2829 static const AVClass webm_class = {
2830 .class_name = "webm muxer",
2831 .item_name = av_default_item_name,
2833 .version = LIBAVUTIL_VERSION_INT,
2836 AVOutputFormat ff_webm_muxer = {
2838 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2839 .mime_type = "video/webm",
2840 .extensions = "webm",
2841 .priv_data_size = sizeof(MatroskaMuxContext),
2842 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2843 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2844 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2846 .deinit = mkv_deinit,
2847 .write_header = mkv_write_header,
2848 .write_packet = mkv_write_flush_packet,
2849 .write_trailer = mkv_write_trailer,
2850 .query_codec = webm_query_codec,
2851 .check_bitstream = mkv_check_bitstream,
2852 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2853 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2854 .priv_class = &webm_class,
2858 #if CONFIG_MATROSKA_AUDIO_MUXER
2859 static const AVClass mka_class = {
2860 .class_name = "matroska audio muxer",
2861 .item_name = av_default_item_name,
2863 .version = LIBAVUTIL_VERSION_INT,
2865 AVOutputFormat ff_matroska_audio_muxer = {
2867 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2868 .mime_type = "audio/x-matroska",
2869 .extensions = "mka",
2870 .priv_data_size = sizeof(MatroskaMuxContext),
2871 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2872 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2873 .video_codec = AV_CODEC_ID_NONE,
2875 .deinit = mkv_deinit,
2876 .write_header = mkv_write_header,
2877 .write_packet = mkv_write_flush_packet,
2878 .write_trailer = mkv_write_trailer,
2879 .check_bitstream = mkv_check_bitstream,
2880 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2882 .codec_tag = (const AVCodecTag* const []){
2883 ff_codec_wav_tags, additional_audio_tags, 0
2885 .priv_class = &mka_class,