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 "subtitles.h"
36 #include "vorbiscomment.h"
39 #include "libavutil/avstring.h"
40 #include "libavutil/channel_layout.h"
41 #include "libavutil/crc.h"
42 #include "libavutil/dict.h"
43 #include "libavutil/intfloat.h"
44 #include "libavutil/intreadwrite.h"
45 #include "libavutil/lfg.h"
46 #include "libavutil/mastering_display_metadata.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/opt.h"
49 #include "libavutil/parseutils.h"
50 #include "libavutil/random_seed.h"
51 #include "libavutil/rational.h"
52 #include "libavutil/samplefmt.h"
53 #include "libavutil/sha.h"
54 #include "libavutil/stereo3d.h"
56 #include "libavcodec/xiph.h"
57 #include "libavcodec/mpeg4audio.h"
58 #include "libavcodec/internal.h"
60 typedef struct ebml_master {
61 int64_t pos; ///< absolute offset in the containing AVIOContext where the master's elements start
62 int sizebytes; ///< how many bytes were reserved for the size
65 typedef struct mkv_seekhead_entry {
70 typedef struct mkv_seekhead {
72 int64_t segment_offset; ///< the file offset to the beginning of the segment
73 int reserved_size; ///< -1 if appending to file
75 mkv_seekhead_entry *entries;
79 typedef struct mkv_cuepoint {
83 int64_t cluster_pos; ///< file offset of the cluster containing the block
84 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
85 int64_t duration; ///< duration of the block according to time base
88 typedef struct mkv_cues {
89 int64_t segment_offset;
90 mkv_cuepoint *entries;
94 typedef struct mkv_track {
98 int64_t sample_rate_offset;
99 int64_t codecpriv_offset;
103 typedef struct mkv_attachment {
108 typedef struct mkv_attachments {
109 mkv_attachment *entries;
113 #define MODE_MATROSKAv2 0x01
114 #define MODE_WEBM 0x02
116 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
117 * range 1 to 126 (inclusive) */
118 #define MAX_TRACKS 126
120 typedef struct MatroskaMuxContext {
121 const AVClass *class;
123 AVIOContext *tags_bc;
125 AVIOContext *info_bc;
127 AVIOContext *tracks_bc;
130 int64_t segment_offset;
131 AVIOContext *cluster_bc;
132 int64_t cluster_pos; ///< file offset of the current cluster
134 int64_t duration_offset;
136 mkv_seekhead *seekhead;
139 mkv_attachments *attachments;
141 AVPacket cur_audio_pkt;
143 int have_attachments;
146 int reserve_cues_space;
147 int cluster_size_limit;
149 int64_t cluster_time_limit;
151 int dash_track_number;
155 uint32_t chapter_id_offset;
158 int64_t last_track_timestamp[MAX_TRACKS];
160 int64_t *stream_durations;
161 int64_t *stream_duration_offsets;
164 } MatroskaMuxContext;
166 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
167 * 8 byte for "matroska" doctype string */
168 #define MAX_EBML_HEADER_SIZE 35
170 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
171 * offset, 4 bytes for target EBML ID */
172 #define MAX_SEEKENTRY_SIZE 21
174 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
175 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
176 #define MAX_CUETRACKPOS_SIZE 35
178 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
179 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
181 /** Seek preroll value for opus */
182 #define OPUS_SEEK_PREROLL 80000000
184 static int ebml_id_size(uint32_t id)
186 return (av_log2(id + 1) - 1) / 7 + 1;
189 static void put_ebml_id(AVIOContext *pb, uint32_t id)
191 int i = ebml_id_size(id);
193 avio_w8(pb, (uint8_t)(id >> (i * 8)));
197 * Write an EBML size meaning "unknown size".
199 * @param bytes The number of bytes the size should occupy (maximum: 8).
201 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
203 av_assert0(bytes <= 8);
204 avio_w8(pb, 0x1ff >> bytes);
205 ffio_fill(pb, 0xff, bytes - 1);
209 * Calculate how many bytes are needed to represent a given number in EBML.
211 static int ebml_num_size(uint64_t num)
214 while ((num + 1) >> bytes * 7)
220 * Write a number in EBML variable length format.
222 * @param bytes The number of bytes that need to be used to write the number.
223 * If zero, any number of bytes can be used.
225 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
227 int i, needed_bytes = ebml_num_size(num);
229 // sizes larger than this are currently undefined in EBML
230 av_assert0(num < (1ULL << 56) - 1);
233 // don't care how many bytes are used, so use the min
234 bytes = needed_bytes;
235 // the bytes needed to write the given size would exceed the bytes
236 // that we need to use, so write unknown size. This shouldn't happen.
237 av_assert0(bytes >= needed_bytes);
239 num |= 1ULL << bytes * 7;
240 for (i = bytes - 1; i >= 0; i--)
241 avio_w8(pb, (uint8_t)(num >> i * 8));
244 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
251 put_ebml_id(pb, elementid);
252 put_ebml_num(pb, bytes, 0);
253 for (i = bytes - 1; i >= 0; i--)
254 avio_w8(pb, (uint8_t)(val >> i * 8));
257 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
260 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
262 while (tmp>>=8) bytes++;
264 put_ebml_id(pb, elementid);
265 put_ebml_num(pb, bytes, 0);
266 for (i = bytes - 1; i >= 0; i--)
267 avio_w8(pb, (uint8_t)(val >> i * 8));
270 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
272 put_ebml_id(pb, elementid);
273 put_ebml_num(pb, 8, 0);
274 avio_wb64(pb, av_double2int(val));
277 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
278 const void *buf, int size)
280 put_ebml_id(pb, elementid);
281 put_ebml_num(pb, size, 0);
282 avio_write(pb, buf, size);
285 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
288 put_ebml_binary(pb, elementid, str, strlen(str));
292 * Write a void element of a given size. Useful for reserving space in
293 * the file to be written to later.
295 * @param size The number of bytes to reserve, which must be at least 2.
297 static void put_ebml_void(AVIOContext *pb, uint64_t size)
299 int64_t currentpos = avio_tell(pb);
301 av_assert0(size >= 2);
303 put_ebml_id(pb, EBML_ID_VOID);
304 // we need to subtract the length needed to store the size from the
305 // size we need to reserve so 2 cases, we use 8 bytes to store the
306 // size if possible, 1 byte otherwise
308 put_ebml_num(pb, size - 2, 0);
310 put_ebml_num(pb, size - 9, 8);
311 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
314 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
315 uint64_t expectedsize)
317 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
319 put_ebml_id(pb, elementid);
320 put_ebml_size_unknown(pb, bytes);
321 return (ebml_master) { avio_tell(pb), bytes };
324 static void end_ebml_master(AVIOContext *pb, ebml_master master)
326 int64_t pos = avio_tell(pb);
328 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
330 put_ebml_num(pb, pos - master.pos, master.sizebytes);
331 avio_seek(pb, pos, SEEK_SET);
334 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
339 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
342 put_ebml_id(pb, elementid);
344 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
349 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
351 uint8_t *buf, crc[4];
354 size = avio_close_dyn_buf(*dyn_cp, &buf);
355 put_ebml_num(pb, size, 0);
356 if (mkv->write_crc) {
357 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
358 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
359 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
361 avio_write(pb, buf + skip, size - skip);
368 * Complete ebml master without destroying the buffer, allowing for later updates
370 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
374 int size = avio_get_dyn_buf(*dyn_cp, &buf);
376 *pos = avio_tell(pb);
378 put_ebml_num(pb, size, 0);
379 avio_write(pb, buf, size);
382 static void put_xiph_size(AVIOContext *pb, int size)
384 ffio_fill(pb, 255, size / 255);
385 avio_w8(pb, size % 255);
389 * Free the members allocated in the mux context.
391 static void mkv_free(MatroskaMuxContext *mkv) {
393 if (mkv->cluster_bc) {
394 avio_close_dyn_buf(mkv->cluster_bc, &buf);
398 avio_close_dyn_buf(mkv->info_bc, &buf);
401 if (mkv->tracks_bc) {
402 avio_close_dyn_buf(mkv->tracks_bc, &buf);
406 avio_close_dyn_buf(mkv->tags_bc, &buf);
410 av_freep(&mkv->seekhead->entries);
411 av_freep(&mkv->seekhead);
414 av_freep(&mkv->cues->entries);
415 av_freep(&mkv->cues);
417 if (mkv->attachments) {
418 av_freep(&mkv->attachments->entries);
419 av_freep(&mkv->attachments);
421 av_freep(&mkv->tracks);
422 av_freep(&mkv->stream_durations);
423 av_freep(&mkv->stream_duration_offsets);
427 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
428 * elements. If a maximum number of elements is specified, enough space
429 * will be reserved at the current file location to write a seek head of
432 * @param segment_offset The absolute offset to the position in the file
433 * where the segment begins.
434 * @param numelements The maximum number of elements that will be indexed
435 * by this seek head, 0 if unlimited.
437 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
440 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
444 new_seekhead->segment_offset = segment_offset;
446 if (numelements > 0) {
447 new_seekhead->filepos = avio_tell(pb);
448 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
449 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
450 // that an EBML void element will fit afterwards
451 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
452 new_seekhead->max_entries = numelements;
453 put_ebml_void(pb, new_seekhead->reserved_size);
458 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, uint32_t elementid, uint64_t filepos)
460 mkv_seekhead_entry *entries = seekhead->entries;
462 // don't store more elements than we reserved space for
463 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
466 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
468 return AVERROR(ENOMEM);
469 seekhead->entries = entries;
471 seekhead->entries[seekhead->num_entries].elementid = elementid;
472 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
478 * Write the seek head to the file and free it. If a maximum number of
479 * elements was specified to mkv_start_seekhead(), the seek head will
480 * be written at the location reserved for it. Otherwise, it is written
481 * at the current location in the file.
483 * @return The file offset where the seekhead was written,
484 * -1 if an error occurred.
486 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
489 mkv_seekhead *seekhead = mkv->seekhead;
490 ebml_master seekentry;
494 currentpos = avio_tell(pb);
496 if (seekhead->reserved_size > 0) {
497 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
503 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD) < 0) {
508 for (i = 0; i < seekhead->num_entries; i++) {
509 mkv_seekhead_entry *entry = &seekhead->entries[i];
511 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
513 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
514 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
515 put_ebml_id(dyn_cp, entry->elementid);
517 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
518 end_ebml_master(dyn_cp, seekentry);
520 end_ebml_master_crc32(pb, &dyn_cp, mkv);
522 if (seekhead->reserved_size > 0) {
523 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
524 put_ebml_void(pb, remaining);
525 avio_seek(pb, currentpos, SEEK_SET);
527 currentpos = seekhead->filepos;
530 av_freep(&mkv->seekhead->entries);
531 av_freep(&mkv->seekhead);
536 static mkv_cues *mkv_start_cues(int64_t segment_offset)
538 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
542 cues->segment_offset = segment_offset;
546 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
547 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
549 mkv_cuepoint *entries = cues->entries;
554 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
556 return AVERROR(ENOMEM);
557 cues->entries = entries;
559 cues->entries[cues->num_entries].pts = ts;
560 cues->entries[cues->num_entries].stream_idx = stream;
561 cues->entries[cues->num_entries].tracknum = tracknum;
562 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
563 cues->entries[cues->num_entries].relative_pos = relative_pos;
564 cues->entries[cues->num_entries++].duration = duration;
569 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
571 MatroskaMuxContext *mkv = s->priv_data;
572 AVIOContext *dyn_cp, *pb = s->pb;
576 currentpos = avio_tell(pb);
577 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
581 for (i = 0; i < cues->num_entries; i++) {
582 ebml_master cuepoint, track_positions;
583 mkv_cuepoint *entry = &cues->entries[i];
584 uint64_t pts = entry->pts;
587 // Calculate the number of entries, so we know the element size
588 for (j = 0; j < num_tracks; j++)
589 tracks[j].has_cue = 0;
590 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
591 int tracknum = entry[j].stream_idx;
592 av_assert0(tracknum>=0 && tracknum<num_tracks);
593 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
595 tracks[tracknum].has_cue = 1;
599 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
600 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
602 // put all the entries from different tracks that have the exact same
603 // timestamp into the same CuePoint
604 for (j = 0; j < num_tracks; j++)
605 tracks[j].has_cue = 0;
606 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
607 int tracknum = entry[j].stream_idx;
608 av_assert0(tracknum>=0 && tracknum<num_tracks);
609 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
611 tracks[tracknum].has_cue = 1;
612 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
613 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
614 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
615 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
616 if (entry[j].duration != -1)
617 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
618 end_ebml_master(dyn_cp, track_positions);
621 end_ebml_master(dyn_cp, cuepoint);
623 end_ebml_master_crc32(pb, &dyn_cp, mkv);
628 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
630 const uint8_t *header_start[3];
632 int first_header_size;
635 if (par->codec_id == AV_CODEC_ID_VORBIS)
636 first_header_size = 30;
638 first_header_size = 42;
640 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
641 first_header_size, header_start, header_len) < 0) {
642 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
646 avio_w8(pb, 2); // number packets - 1
647 for (j = 0; j < 2; j++) {
648 put_xiph_size(pb, header_len[j]);
650 for (j = 0; j < 3; j++)
651 avio_write(pb, header_start[j], header_len[j]);
656 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
658 if (par->extradata && par->extradata_size == 2)
659 avio_write(pb, par->extradata, 2);
661 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
665 static int put_flac_codecpriv(AVFormatContext *s,
666 AVIOContext *pb, AVCodecParameters *par)
668 int write_comment = (par->channel_layout &&
669 !(par->channel_layout & ~0x3ffffULL) &&
670 !ff_flac_is_native_layout(par->channel_layout));
671 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
678 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
679 "Lavf" : LIBAVFORMAT_IDENT;
680 AVDictionary *dict = NULL;
681 uint8_t buf[32], *data, *p;
684 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
685 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
687 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
688 if (len >= ((1<<24) - 4)) {
690 return AVERROR(EINVAL);
693 data = av_malloc(len + 4);
696 return AVERROR(ENOMEM);
700 AV_WB24(data + 1, len);
703 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
705 avio_write(pb, data, len + 4);
714 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
715 int *sample_rate, int *output_sample_rate)
717 MPEG4AudioConfig mp4ac;
720 ret = avpriv_mpeg4audio_get_config(&mp4ac, extradata,
721 extradata_size * 8, 1);
722 /* Don't abort if the failure is because of missing extradata. Assume in that
723 * case a bitstream filter will provide the muxer with the extradata in the
725 * Abort however if s->pb is not seekable, as we would not be able to seek back
726 * to write the sample rate elements once the extradata shows up, anyway. */
727 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
728 av_log(s, AV_LOG_ERROR,
729 "Error parsing AAC extradata, unable to determine samplerate.\n");
730 return AVERROR(EINVAL);
734 /* This will only happen when this function is called while writing the
735 * header and no extradata is available. The space for this element has
736 * to be reserved for when this function is called again after the
737 * extradata shows up in the first packet, as there's no way to know if
738 * output_sample_rate will be different than sample_rate or not. */
739 *output_sample_rate = *sample_rate;
741 *sample_rate = mp4ac.sample_rate;
742 *output_sample_rate = mp4ac.ext_sample_rate;
747 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
748 AVCodecParameters *par,
751 switch (par->codec_id) {
752 case AV_CODEC_ID_VORBIS:
753 case AV_CODEC_ID_THEORA:
754 return put_xiph_codecpriv(s, dyn_cp, par);
755 case AV_CODEC_ID_FLAC:
756 return put_flac_codecpriv(s, dyn_cp, par);
757 case AV_CODEC_ID_WAVPACK:
758 return put_wv_codecpriv(dyn_cp, par);
759 case AV_CODEC_ID_H264:
760 return ff_isom_write_avcc(dyn_cp, par->extradata,
761 par->extradata_size);
762 case AV_CODEC_ID_HEVC:
763 ff_isom_write_hvcc(dyn_cp, par->extradata,
764 par->extradata_size, 0);
766 case AV_CODEC_ID_AV1:
767 if (par->extradata_size)
768 return ff_isom_write_av1c(dyn_cp, par->extradata,
769 par->extradata_size);
771 put_ebml_void(pb, 4 + 3);
773 case AV_CODEC_ID_ALAC:
774 if (par->extradata_size < 36) {
775 av_log(s, AV_LOG_ERROR,
776 "Invalid extradata found, ALAC expects a 36-byte "
778 return AVERROR_INVALIDDATA;
780 avio_write(dyn_cp, par->extradata + 12,
781 par->extradata_size - 12);
783 case AV_CODEC_ID_AAC:
784 if (par->extradata_size)
785 avio_write(dyn_cp, par->extradata, par->extradata_size);
787 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
790 if (par->codec_id == AV_CODEC_ID_PRORES &&
791 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
792 avio_wl32(dyn_cp, par->codec_tag);
793 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
794 avio_write(dyn_cp, par->extradata, par->extradata_size);
800 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
801 AVCodecParameters *par,
802 int native_id, int qt_id)
806 int ret, codecpriv_size;
808 ret = avio_open_dyn_buf(&dyn_cp);
813 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
814 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
817 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
819 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
820 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
823 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
824 avio_wl32(dyn_cp, par->codec_tag);
825 for(i = 0; i < 0x5a - 8; i++)
828 avio_write(dyn_cp, par->extradata, par->extradata_size);
830 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
831 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
832 avcodec_get_name(par->codec_id));
835 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
837 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
838 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
839 avcodec_get_name(par->codec_id));
840 ret = AVERROR(EINVAL);
843 ff_put_bmp_header(dyn_cp, par, 0, 0);
845 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
847 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
849 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
850 avcodec_get_name(par->codec_id));
851 ret = AVERROR(EINVAL);
854 par->codec_tag = tag;
856 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
859 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
861 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
867 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
869 uint8_t *colorinfo_ptr;
870 int side_data_size = 0;
871 int ret, colorinfo_size;
872 const uint8_t *side_data;
874 ret = avio_open_dyn_buf(&dyn_cp);
878 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
879 par->color_trc < AVCOL_TRC_NB) {
880 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
883 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
884 par->color_space < AVCOL_SPC_NB) {
885 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
887 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
888 par->color_primaries < AVCOL_PRI_NB) {
889 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
891 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
892 par->color_range < AVCOL_RANGE_NB) {
893 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
895 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
896 par->chroma_location <= AVCHROMA_LOC_TOP) {
899 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
900 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
901 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
904 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
906 if (side_data_size) {
907 const AVContentLightMetadata *metadata =
908 (const AVContentLightMetadata*)side_data;
909 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
910 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
913 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
915 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
916 ebml_master meta_element = start_ebml_master(
917 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
918 const AVMasteringDisplayMetadata *metadata =
919 (const AVMasteringDisplayMetadata*)side_data;
920 if (metadata->has_primaries) {
921 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
922 av_q2d(metadata->display_primaries[0][0]));
923 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
924 av_q2d(metadata->display_primaries[0][1]));
925 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
926 av_q2d(metadata->display_primaries[1][0]));
927 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
928 av_q2d(metadata->display_primaries[1][1]));
929 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
930 av_q2d(metadata->display_primaries[2][0]));
931 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
932 av_q2d(metadata->display_primaries[2][1]));
933 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
934 av_q2d(metadata->white_point[0]));
935 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
936 av_q2d(metadata->white_point[1]));
938 if (metadata->has_luminance) {
939 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
940 av_q2d(metadata->max_luminance));
941 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
942 av_q2d(metadata->min_luminance));
944 end_ebml_master(dyn_cp, meta_element);
947 colorinfo_size = avio_close_dyn_buf(dyn_cp, &colorinfo_ptr);
948 if (colorinfo_size) {
949 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
950 avio_write(pb, colorinfo_ptr, colorinfo_size);
951 end_ebml_master(pb, colorinfo);
953 av_free(colorinfo_ptr);
957 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
962 int side_data_size = 0;
963 int ret, projection_size;
964 uint8_t *projection_ptr;
967 const AVSphericalMapping *spherical =
968 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
974 ret = avio_open_dyn_buf(&dyn_cp);
978 switch (spherical->projection) {
979 case AV_SPHERICAL_EQUIRECTANGULAR:
980 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
981 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
983 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
984 ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL);
985 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
986 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
987 avio_wb32(&b, 0); // version + flags
988 avio_wb32(&b, spherical->bound_top);
989 avio_wb32(&b, spherical->bound_bottom);
990 avio_wb32(&b, spherical->bound_left);
991 avio_wb32(&b, spherical->bound_right);
992 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
993 private, avio_tell(&b));
995 case AV_SPHERICAL_CUBEMAP:
996 ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL);
997 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
998 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
999 avio_wb32(&b, 0); // version + flags
1000 avio_wb32(&b, 0); // layout
1001 avio_wb32(&b, spherical->padding);
1002 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
1003 private, avio_tell(&b));
1006 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
1011 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
1012 (double) spherical->yaw / (1 << 16));
1013 if (spherical->pitch)
1014 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
1015 (double) spherical->pitch / (1 << 16));
1016 if (spherical->roll)
1017 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
1018 (double) spherical->roll / (1 << 16));
1021 projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr);
1022 if (projection_size) {
1023 ebml_master projection = start_ebml_master(pb,
1024 MATROSKA_ID_VIDEOPROJECTION,
1026 avio_write(pb, projection_ptr, projection_size);
1027 end_ebml_master(pb, projection);
1029 av_freep(&projection_ptr);
1034 static void mkv_write_field_order(AVIOContext *pb, int mode,
1035 enum AVFieldOrder field_order)
1037 switch (field_order) {
1038 case AV_FIELD_UNKNOWN:
1040 case AV_FIELD_PROGRESSIVE:
1041 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1042 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1048 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1049 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1050 if (mode != MODE_WEBM) {
1051 switch (field_order) {
1053 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1054 MATROSKA_VIDEO_FIELDORDER_TT);
1057 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1058 MATROSKA_VIDEO_FIELDORDER_BB);
1061 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1062 MATROSKA_VIDEO_FIELDORDER_TB);
1065 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1066 MATROSKA_VIDEO_FIELDORDER_BT);
1073 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1074 AVStream *st, int mode, int *h_width, int *h_height)
1078 AVDictionaryEntry *tag;
1079 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1083 // convert metadata into proper side data and add it to the stream
1084 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1085 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1086 int stereo_mode = atoi(tag->value);
1088 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1089 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1094 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1095 stereo_mode != 10 && stereo_mode != 12) {
1096 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1102 // iterate to find the stereo3d side data
1103 for (i = 0; i < st->nb_side_data; i++) {
1104 AVPacketSideData sd = st->side_data[i];
1105 if (sd.type == AV_PKT_DATA_STEREO3D) {
1106 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1108 switch (stereo->type) {
1109 case AV_STEREO3D_2D:
1110 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1112 case AV_STEREO3D_SIDEBYSIDE:
1113 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1114 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1115 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1118 case AV_STEREO3D_TOPBOTTOM:
1119 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1120 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1124 case AV_STEREO3D_CHECKERBOARD:
1125 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1126 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1129 case AV_STEREO3D_LINES:
1130 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1131 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1135 case AV_STEREO3D_COLUMNS:
1136 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1137 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1141 case AV_STEREO3D_FRAMESEQUENCE:
1142 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1143 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1151 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1154 // if webm, do not write unsupported modes
1155 if ((mode == MODE_WEBM &&
1156 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1157 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1158 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1159 av_log(s, AV_LOG_ERROR,
1160 "The specified stereo mode is not valid.\n");
1161 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1162 return AVERROR(EINVAL);
1165 // write StereoMode if format is valid
1166 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1171 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1172 int i, AVIOContext *pb, int default_stream_exists)
1174 AVStream *st = s->streams[i];
1175 AVCodecParameters *par = st->codecpar;
1176 ebml_master subinfo, track;
1179 int bit_depth = av_get_bits_per_sample(par->codec_id);
1180 int sample_rate = par->sample_rate;
1181 int output_sample_rate = 0;
1182 int display_width_div = 1;
1183 int display_height_div = 1;
1185 AVDictionaryEntry *tag;
1187 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1188 mkv->have_attachments = 1;
1192 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1193 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1194 if (par->bits_per_raw_sample)
1195 bit_depth = par->bits_per_raw_sample;
1197 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1200 bit_depth = par->bits_per_coded_sample;
1203 if (par->codec_id == AV_CODEC_ID_AAC) {
1204 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1205 &output_sample_rate);
1210 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1211 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1212 mkv->is_dash ? mkv->dash_track_number : i + 1);
1213 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1214 mkv->is_dash ? mkv->dash_track_number : i + 1);
1215 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1217 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1218 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1219 tag = av_dict_get(st->metadata, "language", NULL, 0);
1220 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1221 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1222 } else if (tag && tag->value) {
1223 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1226 // The default value for TRACKFLAGDEFAULT is 1, so add element
1227 // if we need to clear it.
1228 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1229 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1231 if (st->disposition & AV_DISPOSITION_FORCED)
1232 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1234 if (mkv->mode == MODE_WEBM) {
1235 const char *codec_id;
1236 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1237 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1238 if (ff_webm_codec_tags[j].id == par->codec_id) {
1239 codec_id = ff_webm_codec_tags[j].str;
1244 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1245 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1246 codec_id = "D_WEBVTT/CAPTIONS";
1247 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1248 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1249 codec_id = "D_WEBVTT/DESCRIPTIONS";
1250 native_id = MATROSKA_TRACK_TYPE_METADATA;
1251 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1252 codec_id = "D_WEBVTT/METADATA";
1253 native_id = MATROSKA_TRACK_TYPE_METADATA;
1255 codec_id = "D_WEBVTT/SUBTITLES";
1256 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1261 av_log(s, AV_LOG_ERROR,
1262 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1263 return AVERROR(EINVAL);
1266 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1268 // look for a codec ID string specific to mkv to use,
1269 // if none are found, use AVI codes
1270 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1271 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1272 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1273 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1279 if (mkv->allow_raw_vfw) {
1282 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1283 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1284 return AVERROR(EINVAL);
1289 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1290 int64_t codecdelay = av_rescale_q(par->initial_padding,
1291 (AVRational){ 1, 48000 },
1292 (AVRational){ 1, 1000000000 });
1293 if (codecdelay < 0) {
1294 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1295 return AVERROR(EINVAL);
1297 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1298 // (AVRational){ 1, par->sample_rate },
1301 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1303 if (par->codec_id == AV_CODEC_ID_OPUS) {
1304 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1307 switch (par->codec_type) {
1308 case AVMEDIA_TYPE_VIDEO:
1309 mkv->have_video = 1;
1310 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1312 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1313 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1314 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1317 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1318 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1319 par->codec_id == AV_CODEC_ID_SVQ1 ||
1320 par->codec_id == AV_CODEC_ID_SVQ3 ||
1321 par->codec_id == AV_CODEC_ID_CINEPAK))
1325 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1326 else if (!native_id) {
1327 // if there is no mkv-specific codec ID, use VFW mode
1328 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1329 mkv->tracks[i].write_dts = 1;
1330 s->internal->avoid_negative_ts_use_pts = 0;
1333 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1335 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1336 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1338 mkv_write_field_order(pb, mkv->mode, par->field_order);
1340 // check both side data and metadata for stereo information,
1341 // write the result to the bitstream if any is found
1342 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1344 &display_height_div);
1348 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1349 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1350 (par->format == AV_PIX_FMT_YUVA420P)) {
1351 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1354 // write DisplayWidth and DisplayHeight, they contain the size of
1355 // a single source view and/or the display aspect ratio
1356 if (st->sample_aspect_ratio.num) {
1357 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1358 if (d_width > INT_MAX) {
1359 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1360 return AVERROR(EINVAL);
1362 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1363 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1364 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1365 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1367 AVRational display_aspect_ratio;
1368 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1369 par->width * (int64_t)st->sample_aspect_ratio.num,
1370 par->height * (int64_t)st->sample_aspect_ratio.den,
1372 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1373 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1374 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1377 } else if (display_width_div != 1 || display_height_div != 1) {
1378 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1379 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1380 } else if (mkv->mode != MODE_WEBM)
1381 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1383 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1384 uint32_t color_space = av_le2ne32(par->codec_tag);
1385 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1387 ret = mkv_write_video_color(pb, par, st);
1390 ret = mkv_write_video_projection(s, pb, st);
1393 end_ebml_master(pb, subinfo);
1396 case AVMEDIA_TYPE_AUDIO:
1397 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1400 // no mkv-specific ID, use ACM mode
1401 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1403 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1404 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1406 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1407 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1408 if (output_sample_rate)
1409 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1411 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1412 end_ebml_master(pb, subinfo);
1415 case AVMEDIA_TYPE_SUBTITLE:
1417 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1418 return AVERROR(ENOSYS);
1421 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1422 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1424 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1427 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1428 return AVERROR(EINVAL);
1431 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1432 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1433 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1438 end_ebml_master(pb, track);
1443 static int mkv_write_tracks(AVFormatContext *s)
1445 MatroskaMuxContext *mkv = s->priv_data;
1446 AVIOContext *pb = s->pb;
1447 int i, ret, default_stream_exists = 0;
1449 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1453 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1457 for (i = 0; i < s->nb_streams; i++) {
1458 AVStream *st = s->streams[i];
1459 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1461 for (i = 0; i < s->nb_streams; i++) {
1462 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1467 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1468 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1470 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1475 static int mkv_write_chapters(AVFormatContext *s)
1477 MatroskaMuxContext *mkv = s->priv_data;
1478 AVIOContext *dyn_cp, *pb = s->pb;
1479 ebml_master editionentry;
1480 AVRational scale = {1, 1E9};
1483 if (!s->nb_chapters || mkv->wrote_chapters)
1486 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1487 if (ret < 0) return ret;
1489 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1490 if (ret < 0) return ret;
1492 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1493 if (mkv->mode != MODE_WEBM) {
1494 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1495 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1497 for (i = 0; i < s->nb_chapters; i++) {
1498 ebml_master chapteratom, chapterdisplay;
1499 AVChapter *c = s->chapters[i];
1500 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1501 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1502 AVDictionaryEntry *t = NULL;
1503 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1504 av_log(s, AV_LOG_ERROR,
1505 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1506 chapterstart, chapterend);
1507 return AVERROR_INVALIDDATA;
1510 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1511 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1512 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1513 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1514 if (mkv->mode != MODE_WEBM) {
1515 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1516 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1518 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1519 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1520 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1521 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1522 end_ebml_master(dyn_cp, chapterdisplay);
1524 end_ebml_master(dyn_cp, chapteratom);
1526 end_ebml_master(dyn_cp, editionentry);
1527 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1529 mkv->wrote_chapters = 1;
1533 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1535 uint8_t *key = av_strdup(t->key);
1537 const uint8_t *lang = NULL;
1541 return AVERROR(ENOMEM);
1543 if ((p = strrchr(p, '-')) &&
1544 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1551 else if (*p >= 'a' && *p <= 'z')
1556 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1557 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1559 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1560 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1561 end_ebml_master(pb, tag);
1567 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1568 unsigned int uid, ebml_master *tag)
1571 MatroskaMuxContext *mkv = s->priv_data;
1572 ebml_master targets;
1575 if (!mkv->tags_bc) {
1576 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1577 if (ret < 0) return ret;
1579 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1583 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1584 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1586 put_ebml_uint(pb, elementid, uid);
1587 end_ebml_master(pb, targets);
1591 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1593 return av_strcasecmp(name, "title") &&
1594 av_strcasecmp(name, "stereo_mode") &&
1595 av_strcasecmp(name, "creation_time") &&
1596 av_strcasecmp(name, "encoding_tool") &&
1597 av_strcasecmp(name, "duration") &&
1598 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1599 av_strcasecmp(name, "language")) &&
1600 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1601 (av_strcasecmp(name, "filename") &&
1602 av_strcasecmp(name, "mimetype")));
1605 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1608 MatroskaMuxContext *mkv = s->priv_data;
1611 AVDictionaryEntry *t = NULL;
1613 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1617 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1618 if (mkv_check_tag_name(t->key, elementid)) {
1619 ret = mkv_write_simpletag(mkv->tags_bc, t);
1625 end_ebml_master(mkv->tags_bc, tag);
1629 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1631 AVDictionaryEntry *t = NULL;
1633 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1634 if (mkv_check_tag_name(t->key, elementid))
1640 static int mkv_write_tags(AVFormatContext *s)
1642 MatroskaMuxContext *mkv = s->priv_data;
1645 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1647 if (mkv_check_tag(s->metadata, 0)) {
1648 ret = mkv_write_tag(s, s->metadata, 0, 0);
1649 if (ret < 0) return ret;
1652 for (i = 0; i < s->nb_streams; i++) {
1653 AVStream *st = s->streams[i];
1655 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1658 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1661 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1662 if (ret < 0) return ret;
1665 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1666 for (i = 0; i < s->nb_streams; i++) {
1668 AVStream *st = s->streams[i];
1669 ebml_master tag_target;
1672 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1675 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tag_target);
1678 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1679 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1680 mkv->stream_duration_offsets[i] = avio_tell(pb);
1682 // Reserve space to write duration as a 20-byte string.
1683 // 2 (ebml id) + 1 (data size) + 20 (data)
1684 put_ebml_void(pb, 23);
1685 end_ebml_master(pb, tag);
1686 end_ebml_master(pb, tag_target);
1690 if (mkv->mode != MODE_WEBM) {
1691 for (i = 0; i < s->nb_chapters; i++) {
1692 AVChapter *ch = s->chapters[i];
1694 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1697 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1703 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1704 for (i = 0; i < mkv->attachments->num_entries; i++) {
1705 mkv_attachment *attachment = &mkv->attachments->entries[i];
1706 AVStream *st = s->streams[attachment->stream_idx];
1708 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1711 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1718 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1719 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1721 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1726 static int mkv_write_attachments(AVFormatContext *s)
1728 MatroskaMuxContext *mkv = s->priv_data;
1729 AVIOContext *dyn_cp, *pb = s->pb;
1733 if (!mkv->have_attachments)
1736 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1737 if (!mkv->attachments)
1738 return AVERROR(ENOMEM);
1740 av_lfg_init(&c, av_get_random_seed());
1742 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1743 if (ret < 0) return ret;
1745 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1746 if (ret < 0) return ret;
1748 for (i = 0; i < s->nb_streams; i++) {
1749 AVStream *st = s->streams[i];
1750 ebml_master attached_file;
1751 mkv_attachment *attachment = mkv->attachments->entries;
1752 AVDictionaryEntry *t;
1753 const char *mimetype = NULL;
1756 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1759 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1761 return AVERROR(ENOMEM);
1762 mkv->attachments->entries = attachment;
1764 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1766 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1767 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1768 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1769 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1770 return AVERROR(EINVAL);
1772 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1773 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1774 mimetype = t->value;
1775 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1777 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1778 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1779 mimetype = ff_mkv_mime_tags[i].str;
1782 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1783 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1784 mimetype = ff_mkv_image_mime_tags[i].str;
1789 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1790 "it cannot be deduced from the codec id.\n", i);
1791 return AVERROR(EINVAL);
1794 if (s->flags & AVFMT_FLAG_BITEXACT) {
1795 struct AVSHA *sha = av_sha_alloc();
1798 return AVERROR(ENOMEM);
1799 av_sha_init(sha, 160);
1800 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1801 av_sha_final(sha, digest);
1803 fileuid = AV_RL32(digest);
1805 fileuid = av_lfg_get(&c);
1807 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1808 fileuid, mkv->attachments->num_entries);
1810 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1811 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1812 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1813 end_ebml_master(dyn_cp, attached_file);
1815 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1816 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1818 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1823 static int64_t get_metadata_duration(AVFormatContext *s)
1829 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1830 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1831 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1835 for (i = 0; i < s->nb_streams; i++) {
1837 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1839 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1840 max = FFMAX(max, us);
1843 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1847 static int mkv_write_header(AVFormatContext *s)
1849 MatroskaMuxContext *mkv = s->priv_data;
1850 AVIOContext *pb = s->pb;
1851 ebml_master ebml_header;
1852 AVDictionaryEntry *tag;
1853 int ret, i, version = 2;
1854 int64_t creation_time;
1856 if (!strcmp(s->oformat->name, "webm")) {
1857 mkv->mode = MODE_WEBM;
1860 mkv->mode = MODE_MATROSKAv2;
1862 if (mkv->mode != MODE_WEBM ||
1863 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1864 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1867 for (i = 0; i < s->nb_streams; i++) {
1868 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1869 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1870 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1874 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1876 ret = AVERROR(ENOMEM);
1879 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1880 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1881 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1882 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1883 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1884 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1885 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1886 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1887 end_ebml_master(pb, ebml_header);
1889 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1890 mkv->segment_offset = avio_tell(pb);
1892 // we write a seek head at the beginning to point to all other level
1893 // one elements, which aren't more than 10 elements as we write only one
1894 // of every other currently defined level 1 element
1895 mkv->seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1896 if (!mkv->seekhead) {
1897 ret = AVERROR(ENOMEM);
1901 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1902 if (ret < 0) goto fail;
1904 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1909 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1910 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1911 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1912 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1913 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1914 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1915 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1917 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1919 if (mkv->mode != MODE_WEBM) {
1920 uint32_t segment_uid[4];
1923 av_lfg_init(&lfg, av_get_random_seed());
1925 for (i = 0; i < 4; i++)
1926 segment_uid[i] = av_lfg_get(&lfg);
1928 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1931 const char *ident = "Lavf";
1932 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1933 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1936 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1937 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1938 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1939 uint8_t date_utc_buf[8];
1940 AV_WB64(date_utc_buf, date_utc);
1941 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1944 // reserve space for the duration
1946 mkv->duration_offset = avio_tell(pb);
1947 if (!mkv->is_live) {
1948 int64_t metadata_duration = get_metadata_duration(s);
1950 if (s->duration > 0) {
1951 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1952 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1953 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1954 } else if (metadata_duration > 0) {
1955 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1956 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1957 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1959 put_ebml_void(pb, 11); // assumes double-precision float to be written
1962 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1963 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1965 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1968 // initialize stream_duration fields
1969 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1970 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1971 if (!mkv->stream_durations || !mkv->stream_duration_offsets) {
1972 ret = AVERROR(ENOMEM);
1976 ret = mkv_write_tracks(s);
1980 for (i = 0; i < s->nb_chapters; i++)
1981 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1983 ret = mkv_write_chapters(s);
1987 if (mkv->mode != MODE_WEBM) {
1988 ret = mkv_write_attachments(s);
1993 ret = mkv_write_tags(s);
1997 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1998 mkv_write_seekhead(pb, mkv);
2000 mkv->cues = mkv_start_cues(mkv->segment_offset);
2002 ret = AVERROR(ENOMEM);
2006 if (s->metadata_header_padding > 0) {
2007 if (s->metadata_header_padding == 1)
2008 s->metadata_header_padding++;
2009 put_ebml_void(pb, s->metadata_header_padding);
2012 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
2013 mkv->cues_pos = avio_tell(pb);
2014 if (mkv->reserve_cues_space == 1)
2015 mkv->reserve_cues_space++;
2016 put_ebml_void(pb, mkv->reserve_cues_space);
2019 av_init_packet(&mkv->cur_audio_pkt);
2020 mkv->cur_audio_pkt.size = 0;
2021 mkv->cluster_pos = -1;
2025 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2026 // after 4k and on a keyframe
2027 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
2028 if (mkv->cluster_time_limit < 0)
2029 mkv->cluster_time_limit = 5000;
2030 if (mkv->cluster_size_limit < 0)
2031 mkv->cluster_size_limit = 5 * 1024 * 1024;
2033 if (mkv->cluster_time_limit < 0)
2034 mkv->cluster_time_limit = 1000;
2035 if (mkv->cluster_size_limit < 0)
2036 mkv->cluster_size_limit = 32 * 1024;
2045 static int mkv_blockgroup_size(int pkt_size)
2047 int size = pkt_size + 4;
2048 size += ebml_num_size(size);
2049 size += 2; // EBML ID for block and block duration
2050 size += 9; // max size of block duration incl. length field
2054 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
2061 dst = av_malloc(srclen);
2063 return AVERROR(ENOMEM);
2065 while (srclen >= WV_HEADER_SIZE) {
2068 ret = ff_wv_parse_header(&header, src);
2071 src += WV_HEADER_SIZE;
2072 srclen -= WV_HEADER_SIZE;
2074 if (srclen < header.blocksize) {
2075 ret = AVERROR_INVALIDDATA;
2079 if (header.initial) {
2080 AV_WL32(dst + offset, header.samples);
2083 AV_WL32(dst + offset, header.flags);
2084 AV_WL32(dst + offset + 4, header.crc);
2087 if (!(header.initial && header.final)) {
2088 AV_WL32(dst + offset, header.blocksize);
2092 memcpy(dst + offset, src, header.blocksize);
2093 src += header.blocksize;
2094 srclen -= header.blocksize;
2095 offset += header.blocksize;
2107 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2108 uint32_t blockid, AVPacket *pkt, int keyframe)
2110 MatroskaMuxContext *mkv = s->priv_data;
2111 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2112 uint8_t *data = NULL, *side_data = NULL;
2113 int offset = 0, size = pkt->size, side_data_size = 0;
2114 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2115 uint64_t additional_id = 0;
2116 int64_t discard_padding = 0;
2117 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2118 ebml_master block_group, block_additions, block_more;
2120 ts += mkv->tracks[pkt->stream_index].ts_offset;
2122 /* The following string is identical to the one in mkv_write_vtt_blocks
2123 * so that only one copy needs to exist in binaries. */
2124 av_log(s, AV_LOG_DEBUG,
2125 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2126 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2127 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2128 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2129 mkv->cluster_pos, track_number, keyframe != 0);
2130 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2131 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2132 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2133 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2134 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2135 /* extradata is Annex B, assume the bitstream is too and convert it */
2136 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2137 else if (par->codec_id == AV_CODEC_ID_AV1)
2138 ff_av1_filter_obus_buf(pkt->data, &data, &size);
2139 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2140 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
2142 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
2148 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2149 /* Matroska specification requires to remove the first QuickTime atom
2155 side_data = av_packet_get_side_data(pkt,
2156 AV_PKT_DATA_SKIP_SAMPLES,
2159 if (side_data && side_data_size >= 10) {
2160 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2161 (AVRational){1, par->sample_rate},
2162 (AVRational){1, 1000000000});
2165 side_data = av_packet_get_side_data(pkt,
2166 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2169 additional_id = AV_RB64(side_data);
2171 side_data_size -= 8;
2174 if ((side_data_size && additional_id == 1) || discard_padding) {
2175 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2176 blockid = MATROSKA_ID_BLOCK;
2179 put_ebml_id(pb, blockid);
2180 put_ebml_num(pb, size + 4, 0);
2181 // this assumes stream_index is less than 126
2182 avio_w8(pb, 0x80 | track_number);
2183 avio_wb16(pb, ts - mkv->cluster_pts);
2184 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2185 avio_write(pb, data + offset, size);
2186 if (data != pkt->data)
2189 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2190 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
2191 mkv->last_track_timestamp[track_number - 1]);
2193 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
2195 if (discard_padding) {
2196 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2199 if (side_data_size && additional_id == 1) {
2200 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2201 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2202 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2203 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2204 put_ebml_num(pb, side_data_size, 0);
2205 avio_write(pb, side_data, side_data_size);
2206 end_ebml_master(pb, block_more);
2207 end_ebml_master(pb, block_additions);
2209 if ((side_data_size && additional_id == 1) || discard_padding) {
2210 end_ebml_master(pb, block_group);
2214 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2216 MatroskaMuxContext *mkv = s->priv_data;
2217 ebml_master blockgroup;
2218 int id_size, settings_size, size;
2219 uint8_t *id, *settings;
2220 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2221 const int flags = 0;
2224 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2228 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2231 size = id_size + 1 + settings_size + 1 + pkt->size;
2233 /* The following string is identical to the one in mkv_write_block so that
2234 * only one copy needs to exist in binaries. */
2235 av_log(s, AV_LOG_DEBUG,
2236 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2237 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2238 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2239 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2240 mkv->cluster_pos, pkt->stream_index + 1, 1);
2242 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2244 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2245 put_ebml_num(pb, size + 4, 0);
2246 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2247 avio_wb16(pb, ts - mkv->cluster_pts);
2249 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2251 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2252 end_ebml_master(pb, blockgroup);
2254 return pkt->duration;
2257 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
2259 MatroskaMuxContext *mkv = s->priv_data;
2261 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2262 mkv->cluster_pos = -1;
2263 av_log(s, AV_LOG_DEBUG,
2264 "Starting new cluster at offset %" PRIu64 " bytes, "
2265 "pts %" PRIu64 ", dts %" PRIu64 "\n",
2266 avio_tell(s->pb), pkt->pts, pkt->dts);
2270 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2272 MatroskaMuxContext *mkv = s->priv_data;
2273 mkv_track *track = &mkv->tracks[pkt->stream_index];
2274 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2276 int side_data_size = 0, ret;
2278 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2281 switch (par->codec_id) {
2282 case AV_CODEC_ID_AAC:
2283 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2284 int filler, output_sample_rate = 0;
2286 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2287 &output_sample_rate);
2290 if (!output_sample_rate)
2291 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2292 av_freep(&par->extradata);
2293 ret = ff_alloc_extradata(par, side_data_size);
2296 memcpy(par->extradata, side_data, side_data_size);
2297 curpos = avio_tell(mkv->tracks_bc);
2298 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2299 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2300 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2302 put_ebml_void(mkv->tracks_bc, filler);
2303 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2304 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2305 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2306 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2307 } else if (!par->extradata_size && !track->sample_rate) {
2308 // No extradata (codecpar or packet side data).
2309 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2310 return AVERROR(EINVAL);
2313 case AV_CODEC_ID_FLAC:
2314 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2315 AVCodecParameters *codecpriv_par;
2317 if (side_data_size != par->extradata_size) {
2318 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2320 return AVERROR(EINVAL);
2322 codecpriv_par = avcodec_parameters_alloc();
2324 return AVERROR(ENOMEM);
2325 ret = avcodec_parameters_copy(codecpriv_par, par);
2327 avcodec_parameters_free(&codecpriv_par);
2330 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2331 curpos = avio_tell(mkv->tracks_bc);
2332 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2333 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2334 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2335 avcodec_parameters_free(&codecpriv_par);
2338 // FIXME: Remove the following once libaom starts propagating extradata during init()
2339 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2340 case AV_CODEC_ID_AV1:
2341 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2342 !par->extradata_size) {
2343 AVIOContext *dyn_cp;
2347 ret = avio_open_dyn_buf(&dyn_cp);
2350 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2351 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2352 if (!codecpriv_size) {
2354 return AVERROR_INVALIDDATA;
2356 curpos = avio_tell(mkv->tracks_bc);
2357 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2358 // Do not write the OBUs as we don't have space saved for them
2359 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2361 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2362 ret = ff_alloc_extradata(par, side_data_size);
2365 memcpy(par->extradata, side_data, side_data_size);
2366 } else if (!par->extradata_size)
2367 return AVERROR_INVALIDDATA;
2371 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2378 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2380 MatroskaMuxContext *mkv = s->priv_data;
2381 AVIOContext *pb = s->pb;
2382 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2383 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2384 int duration = pkt->duration;
2386 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2387 int64_t relative_packet_pos;
2388 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2390 if (ts == AV_NOPTS_VALUE) {
2391 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2392 return AVERROR(EINVAL);
2394 ts += mkv->tracks[pkt->stream_index].ts_offset;
2396 if (mkv->cluster_pos != -1) {
2397 int64_t cluster_time = ts - mkv->cluster_pts;
2398 if ((int16_t)cluster_time != cluster_time) {
2399 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2400 mkv_start_new_cluster(s, pkt);
2404 if (mkv->cluster_pos == -1) {
2405 mkv->cluster_pos = avio_tell(s->pb);
2406 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2409 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2410 mkv->cluster_pts = FFMAX(0, ts);
2412 pb = mkv->cluster_bc;
2414 relative_packet_pos = avio_tell(pb);
2416 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2417 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2418 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2419 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2420 if (ret < 0) return ret;
2423 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2424 duration = mkv_write_vtt_blocks(s, pb, pkt);
2426 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2427 mkv_blockgroup_size(pkt->size));
2429 #if FF_API_CONVERGENCE_DURATION
2430 FF_DISABLE_DEPRECATION_WARNINGS
2431 /* For backward compatibility, prefer convergence_duration. */
2432 if (pkt->convergence_duration > 0) {
2433 duration = pkt->convergence_duration;
2435 FF_ENABLE_DEPRECATION_WARNINGS
2437 /* All subtitle blocks are considered to be keyframes. */
2438 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2439 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2440 end_ebml_master(pb, blockgroup);
2443 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2444 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
2445 mkv->cluster_pos, relative_packet_pos, duration);
2451 mkv->duration = FFMAX(mkv->duration, ts + duration);
2453 if (mkv->stream_durations)
2454 mkv->stream_durations[pkt->stream_index] =
2455 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
2460 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2462 MatroskaMuxContext *mkv = s->priv_data;
2463 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2464 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2466 int64_t cluster_time;
2468 int start_new_cluster;
2470 ret = mkv_check_new_extra_data(s, pkt);
2474 if (mkv->tracks[pkt->stream_index].write_dts)
2475 cluster_time = pkt->dts - mkv->cluster_pts;
2477 cluster_time = pkt->pts - mkv->cluster_pts;
2478 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2480 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2481 // after 4k and on a keyframe
2482 cluster_size = avio_tell(mkv->cluster_bc);
2484 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2485 // WebM DASH specification states that the first block of every cluster
2486 // has to be a key frame. So for DASH video, we only create a cluster
2487 // on seeing key frames.
2488 start_new_cluster = keyframe;
2489 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2490 (mkv->cluster_pos == -1 ||
2491 cluster_time > mkv->cluster_time_limit)) {
2492 // For DASH audio, we create a Cluster based on cluster_time_limit
2493 start_new_cluster = 1;
2494 } else if (!mkv->is_dash &&
2495 (cluster_size > mkv->cluster_size_limit ||
2496 cluster_time > mkv->cluster_time_limit ||
2497 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2498 cluster_size > 4 * 1024))) {
2499 start_new_cluster = 1;
2501 start_new_cluster = 0;
2504 if (mkv->cluster_pos != -1 && start_new_cluster) {
2505 mkv_start_new_cluster(s, pkt);
2508 if (!mkv->cluster_pos)
2509 avio_write_marker(s->pb,
2510 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2511 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2513 // check if we have an audio packet cached
2514 if (mkv->cur_audio_pkt.size > 0) {
2515 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2516 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2517 mkv->is_dash ? start_new_cluster : 0);
2518 av_packet_unref(&mkv->cur_audio_pkt);
2520 av_log(s, AV_LOG_ERROR,
2521 "Could not write cached audio packet ret:%d\n", ret);
2526 // buffer an audio packet to ensure the packet containing the video
2527 // keyframe's timecode is contained in the same cluster for WebM
2528 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2530 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2532 ret = mkv_write_packet_internal(s, pkt, 0);
2536 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2538 MatroskaMuxContext *mkv = s->priv_data;
2541 if (mkv->cluster_pos != -1) {
2542 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2543 mkv->cluster_pos = -1;
2544 av_log(s, AV_LOG_DEBUG,
2545 "Flushing cluster at offset %" PRIu64 " bytes\n",
2551 return mkv_write_packet(s, pkt);
2554 static int mkv_write_trailer(AVFormatContext *s)
2556 MatroskaMuxContext *mkv = s->priv_data;
2557 AVIOContext *pb = s->pb;
2558 int64_t currentpos, cuespos;
2561 // check if we have an audio packet cached
2562 if (mkv->cur_audio_pkt.size > 0) {
2563 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2564 av_packet_unref(&mkv->cur_audio_pkt);
2566 av_log(s, AV_LOG_ERROR,
2567 "Could not write cached audio packet ret:%d\n", ret);
2572 if (mkv->cluster_bc) {
2573 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2576 ret = mkv_write_chapters(s);
2581 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2582 if (mkv->cues->num_entries) {
2583 if (mkv->reserve_cues_space) {
2586 currentpos = avio_tell(pb);
2587 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2589 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2590 cues_end = avio_tell(pb);
2591 if (cues_end > cuespos + mkv->reserve_cues_space) {
2592 av_log(s, AV_LOG_ERROR,
2593 "Insufficient space reserved for cues: %d "
2594 "(needed: %" PRId64 ").\n",
2595 mkv->reserve_cues_space, cues_end - cuespos);
2596 return AVERROR(EINVAL);
2599 if (cues_end < cuespos + mkv->reserve_cues_space)
2600 put_ebml_void(pb, mkv->reserve_cues_space -
2601 (cues_end - cuespos));
2603 avio_seek(pb, currentpos, SEEK_SET);
2605 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2608 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CUES,
2614 mkv_write_seekhead(pb, mkv);
2616 // update the duration
2617 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2618 currentpos = avio_tell(pb);
2619 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2620 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2621 avio_seek(pb, mkv->info_pos, SEEK_SET);
2622 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2624 // write tracks master
2625 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2626 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2628 // update stream durations
2629 if (!mkv->is_live && mkv->stream_durations) {
2631 int64_t curr = avio_tell(mkv->tags_bc);
2632 for (i = 0; i < s->nb_streams; ++i) {
2633 AVStream *st = s->streams[i];
2635 if (mkv->stream_duration_offsets[i] > 0) {
2636 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2637 char duration_string[20] = "";
2639 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2640 mkv->stream_durations[i]);
2642 avio_seek(mkv->tags_bc, mkv->stream_duration_offsets[i], SEEK_SET);
2644 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2645 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2646 fmod(duration_sec, 60));
2648 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2651 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2653 if (mkv->tags_bc && !mkv->is_live) {
2654 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2655 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2658 avio_seek(pb, currentpos, SEEK_SET);
2661 if (!mkv->is_live) {
2662 end_ebml_master(pb, mkv->segment);
2669 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2672 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2673 if (ff_mkv_codec_tags[i].id == codec_id)
2676 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2677 enum AVMediaType type = avcodec_get_type(codec_id);
2678 // mkv theoretically supports any video/audio through VFW/ACM
2679 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2686 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2689 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2690 if (ff_webm_codec_tags[i].id == codec_id)
2696 static int mkv_init(struct AVFormatContext *s)
2700 if (s->nb_streams > MAX_TRACKS) {
2701 av_log(s, AV_LOG_ERROR,
2702 "At most %d streams are supported for muxing in Matroska\n",
2704 return AVERROR(EINVAL);
2707 for (i = 0; i < s->nb_streams; i++) {
2708 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2709 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2710 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2711 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2712 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2713 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2714 av_log(s, AV_LOG_ERROR,
2715 "The Matroska muxer does not yet support muxing %s\n",
2716 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2717 return AVERROR_PATCHWELCOME;
2721 if (s->avoid_negative_ts < 0) {
2722 s->avoid_negative_ts = 1;
2723 s->internal->avoid_negative_ts_use_pts = 1;
2726 for (i = 0; i < s->nb_streams; i++) {
2727 // ms precision is the de-facto standard timescale for mkv files
2728 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2734 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2737 AVStream *st = s->streams[pkt->stream_index];
2739 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2740 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2741 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2742 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2743 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2749 static const AVCodecTag additional_audio_tags[] = {
2750 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2751 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2752 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2753 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2754 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2755 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2756 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2757 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2758 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2759 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2760 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2761 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2762 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2765 static const AVCodecTag additional_video_tags[] = {
2766 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2767 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2768 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2769 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2772 static const AVCodecTag additional_subtitle_tags[] = {
2773 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2774 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2775 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2776 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2779 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2780 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2781 static const AVOption options[] = {
2782 { "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 },
2783 { "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 },
2784 { "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 },
2785 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2786 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2787 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2788 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2789 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2793 #if CONFIG_MATROSKA_MUXER
2794 static const AVClass matroska_class = {
2795 .class_name = "matroska muxer",
2796 .item_name = av_default_item_name,
2798 .version = LIBAVUTIL_VERSION_INT,
2801 AVOutputFormat ff_matroska_muxer = {
2803 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2804 .mime_type = "video/x-matroska",
2805 .extensions = "mkv",
2806 .priv_data_size = sizeof(MatroskaMuxContext),
2807 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2808 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2809 .video_codec = CONFIG_LIBX264_ENCODER ?
2810 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
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 .write_header = mkv_write_header,
2847 .write_packet = mkv_write_flush_packet,
2848 .write_trailer = mkv_write_trailer,
2849 .query_codec = webm_query_codec,
2850 .check_bitstream = mkv_check_bitstream,
2851 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2852 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2853 .priv_class = &webm_class,
2857 #if CONFIG_MATROSKA_AUDIO_MUXER
2858 static const AVClass mka_class = {
2859 .class_name = "matroska audio muxer",
2860 .item_name = av_default_item_name,
2862 .version = LIBAVUTIL_VERSION_INT,
2864 AVOutputFormat ff_matroska_audio_muxer = {
2866 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2867 .mime_type = "audio/x-matroska",
2868 .extensions = "mka",
2869 .priv_data_size = sizeof(MatroskaMuxContext),
2870 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2871 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2872 .video_codec = AV_CODEC_ID_NONE,
2874 .write_header = mkv_write_header,
2875 .write_packet = mkv_write_flush_packet,
2876 .write_trailer = mkv_write_trailer,
2877 .check_bitstream = mkv_check_bitstream,
2878 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2880 .codec_tag = (const AVCodecTag* const []){
2881 ff_codec_wav_tags, additional_audio_tags, 0
2883 .priv_class = &mka_class,