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; ///< offset of the cluster containing the block relative to the segment
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 last_timestamp;
101 int64_t duration_offset;
102 int64_t codecpriv_offset;
106 typedef struct mkv_attachment {
111 typedef struct mkv_attachments {
112 mkv_attachment *entries;
116 #define MODE_MATROSKAv2 0x01
117 #define MODE_WEBM 0x02
119 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
120 * range 1 to 126 (inclusive) */
121 #define MAX_TRACKS 126
123 typedef struct MatroskaMuxContext {
124 const AVClass *class;
126 AVIOContext *tags_bc;
128 AVIOContext *info_bc;
130 AVIOContext *tracks_bc;
133 int64_t segment_offset;
134 AVIOContext *cluster_bc;
135 int64_t cluster_pos; ///< file offset of the current cluster
137 int64_t duration_offset;
139 mkv_seekhead *seekhead;
142 mkv_attachments *attachments;
144 AVPacket cur_audio_pkt;
146 int have_attachments;
149 int reserve_cues_space;
150 int cluster_size_limit;
152 int64_t cluster_time_limit;
154 int dash_track_number;
158 uint32_t chapter_id_offset;
162 } MatroskaMuxContext;
164 /** 2 bytes * 7 for EBML IDs, 7 1-byte EBML lengths, 6 1-byte uint,
165 * 8 byte for "matroska" doctype string */
166 #define MAX_EBML_HEADER_SIZE 35
168 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
169 * offset, 4 bytes for target EBML ID */
170 #define MAX_SEEKENTRY_SIZE 21
172 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 3 8-byte uint max
173 * and one 1-byte uint for the track number (this assumes MAX_TRACKS to be <= 255) */
174 #define MAX_CUETRACKPOS_SIZE 35
176 /** per-cuepoint - 1 1-byte EBML ID, 1 1-byte EBML size, 8-byte uint max */
177 #define MAX_CUEPOINT_CONTENT_SIZE(num_tracks) 10 + MAX_CUETRACKPOS_SIZE * num_tracks
179 /** Seek preroll value for opus */
180 #define OPUS_SEEK_PREROLL 80000000
182 static int ebml_id_size(uint32_t id)
184 return (av_log2(id + 1) - 1) / 7 + 1;
187 static void put_ebml_id(AVIOContext *pb, uint32_t id)
189 int i = ebml_id_size(id);
191 avio_w8(pb, (uint8_t)(id >> (i * 8)));
195 * Write an EBML size meaning "unknown size".
197 * @param bytes The number of bytes the size should occupy (maximum: 8).
199 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
201 av_assert0(bytes <= 8);
202 avio_w8(pb, 0x1ff >> bytes);
203 ffio_fill(pb, 0xff, bytes - 1);
207 * Calculate how many bytes are needed to represent a given number in EBML.
209 static int ebml_num_size(uint64_t num)
212 while ((num + 1) >> bytes * 7)
218 * Write a number in EBML variable length format.
220 * @param bytes The number of bytes that need to be used to write the number.
221 * If zero, the minimal number of bytes will be used.
223 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
225 int i, needed_bytes = ebml_num_size(num);
227 // sizes larger than this are currently undefined in EBML
228 av_assert0(num < (1ULL << 56) - 1);
231 bytes = needed_bytes;
232 // The bytes needed to write the given size must not exceed
233 // the bytes that we ought to use.
234 av_assert0(bytes >= needed_bytes);
236 num |= 1ULL << bytes * 7;
237 for (i = bytes - 1; i >= 0; i--)
238 avio_w8(pb, (uint8_t)(num >> i * 8));
241 static void put_ebml_uint(AVIOContext *pb, uint32_t elementid, uint64_t val)
248 put_ebml_id(pb, elementid);
249 put_ebml_num(pb, bytes, 0);
250 for (i = bytes - 1; i >= 0; i--)
251 avio_w8(pb, (uint8_t)(val >> i * 8));
254 static void put_ebml_sint(AVIOContext *pb, uint32_t elementid, int64_t val)
257 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
259 while (tmp>>=8) bytes++;
261 put_ebml_id(pb, elementid);
262 put_ebml_num(pb, bytes, 0);
263 for (i = bytes - 1; i >= 0; i--)
264 avio_w8(pb, (uint8_t)(val >> i * 8));
267 static void put_ebml_float(AVIOContext *pb, uint32_t elementid, double val)
269 put_ebml_id(pb, elementid);
270 put_ebml_num(pb, 8, 0);
271 avio_wb64(pb, av_double2int(val));
274 static void put_ebml_binary(AVIOContext *pb, uint32_t elementid,
275 const void *buf, int size)
277 put_ebml_id(pb, elementid);
278 put_ebml_num(pb, size, 0);
279 avio_write(pb, buf, size);
282 static void put_ebml_string(AVIOContext *pb, uint32_t elementid,
285 put_ebml_binary(pb, elementid, str, strlen(str));
289 * Write a void element of a given size. Useful for reserving space in
290 * the file to be written to later.
292 * @param size The number of bytes to reserve, which must be at least 2.
294 static void put_ebml_void(AVIOContext *pb, uint64_t size)
296 int64_t currentpos = avio_tell(pb);
298 av_assert0(size >= 2);
300 put_ebml_id(pb, EBML_ID_VOID);
301 // we need to subtract the length needed to store the size from the
302 // size we need to reserve so 2 cases, we use 8 bytes to store the
303 // size if possible, 1 byte otherwise
305 put_ebml_num(pb, size - 2, 0);
307 put_ebml_num(pb, size - 9, 8);
308 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
311 static ebml_master start_ebml_master(AVIOContext *pb, uint32_t elementid,
312 uint64_t expectedsize)
314 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
316 put_ebml_id(pb, elementid);
317 put_ebml_size_unknown(pb, bytes);
318 return (ebml_master) { avio_tell(pb), bytes };
321 static void end_ebml_master(AVIOContext *pb, ebml_master master)
323 int64_t pos = avio_tell(pb);
325 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
327 put_ebml_num(pb, pos - master.pos, master.sizebytes);
328 avio_seek(pb, pos, SEEK_SET);
331 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
336 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
339 put_ebml_id(pb, elementid);
341 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
346 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv)
348 uint8_t *buf, crc[4];
351 size = avio_close_dyn_buf(*dyn_cp, &buf);
352 put_ebml_num(pb, size, 0);
353 if (mkv->write_crc) {
354 skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */
355 AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX);
356 put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc));
358 avio_write(pb, buf + skip, size - skip);
365 * Complete ebml master without destroying the buffer, allowing for later updates
367 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
371 int size = avio_get_dyn_buf(*dyn_cp, &buf);
373 *pos = avio_tell(pb);
375 put_ebml_num(pb, size, 0);
376 avio_write(pb, buf, size);
379 static void put_xiph_size(AVIOContext *pb, int size)
381 ffio_fill(pb, 255, size / 255);
382 avio_w8(pb, size % 255);
386 * Free the members allocated in the mux context.
388 static void mkv_deinit(AVFormatContext *s)
390 MatroskaMuxContext *mkv = s->priv_data;
392 av_packet_unref(&mkv->cur_audio_pkt);
394 ffio_free_dyn_buf(&mkv->cluster_bc);
395 ffio_free_dyn_buf(&mkv->info_bc);
396 ffio_free_dyn_buf(&mkv->tracks_bc);
397 ffio_free_dyn_buf(&mkv->tags_bc);
400 av_freep(&mkv->seekhead->entries);
401 av_freep(&mkv->seekhead);
404 av_freep(&mkv->cues->entries);
405 av_freep(&mkv->cues);
407 if (mkv->attachments) {
408 av_freep(&mkv->attachments->entries);
409 av_freep(&mkv->attachments);
411 av_freep(&mkv->tracks);
415 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
416 * elements. If a maximum number of elements is specified, enough space
417 * will be reserved at the current file location to write a seek head of
420 * @param segment_offset The absolute offset to the position in the file
421 * where the segment begins.
422 * @param numelements The maximum number of elements that will be indexed
423 * by this seek head, 0 if unlimited.
425 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
428 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
432 new_seekhead->segment_offset = segment_offset;
434 if (numelements > 0) {
435 new_seekhead->filepos = avio_tell(pb);
436 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
437 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
438 // that an EBML void element will fit afterwards
439 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
440 new_seekhead->max_entries = numelements;
441 put_ebml_void(pb, new_seekhead->reserved_size);
446 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, uint32_t elementid, uint64_t filepos)
448 mkv_seekhead_entry *entries = seekhead->entries;
450 // don't store more elements than we reserved space for
451 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
454 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
456 return AVERROR(ENOMEM);
457 seekhead->entries = entries;
459 seekhead->entries[seekhead->num_entries].elementid = elementid;
460 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
466 * Write the seek head to the file and free it. If a maximum number of
467 * elements was specified to mkv_start_seekhead(), the seek head will
468 * be written at the location reserved for it. Otherwise, it is written
469 * at the current location in the file.
471 * @return The file offset where the seekhead was written,
472 * -1 if an error occurred.
474 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
477 mkv_seekhead *seekhead = mkv->seekhead;
478 ebml_master seekentry;
482 currentpos = avio_tell(pb);
484 if (seekhead->reserved_size > 0) {
485 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
491 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_SEEKHEAD) < 0) {
496 for (i = 0; i < seekhead->num_entries; i++) {
497 mkv_seekhead_entry *entry = &seekhead->entries[i];
499 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
501 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
502 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
503 put_ebml_id(dyn_cp, entry->elementid);
505 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
506 end_ebml_master(dyn_cp, seekentry);
508 end_ebml_master_crc32(pb, &dyn_cp, mkv);
510 if (seekhead->reserved_size > 0) {
511 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
512 put_ebml_void(pb, remaining);
513 avio_seek(pb, currentpos, SEEK_SET);
515 currentpos = seekhead->filepos;
518 av_freep(&mkv->seekhead->entries);
519 av_freep(&mkv->seekhead);
524 static mkv_cues *mkv_start_cues(int64_t segment_offset)
526 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
530 cues->segment_offset = segment_offset;
534 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
535 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
537 mkv_cuepoint *entries = cues->entries;
542 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
544 return AVERROR(ENOMEM);
545 cues->entries = entries;
547 cues->entries[cues->num_entries].pts = ts;
548 cues->entries[cues->num_entries].stream_idx = stream;
549 cues->entries[cues->num_entries].tracknum = tracknum;
550 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
551 cues->entries[cues->num_entries].relative_pos = relative_pos;
552 cues->entries[cues->num_entries++].duration = duration;
557 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
559 MatroskaMuxContext *mkv = s->priv_data;
560 AVIOContext *dyn_cp, *pb = s->pb;
564 currentpos = avio_tell(pb);
565 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CUES);
569 for (i = 0; i < cues->num_entries; i++) {
570 ebml_master cuepoint, track_positions;
571 mkv_cuepoint *entry = &cues->entries[i];
572 uint64_t pts = entry->pts;
575 // Calculate the number of entries, so we know the element size
576 for (j = 0; j < num_tracks; j++)
577 tracks[j].has_cue = 0;
578 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
579 int idx = entry[j].stream_idx;
581 av_assert0(idx >= 0 && idx < num_tracks);
582 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
584 tracks[idx].has_cue = 1;
588 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_CONTENT_SIZE(ctp_nb));
589 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
591 // put all the entries from different tracks that have the exact same
592 // timestamp into the same CuePoint
593 for (j = 0; j < num_tracks; j++)
594 tracks[j].has_cue = 0;
595 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
596 int idx = entry[j].stream_idx;
598 if (tracks[idx].has_cue && s->streams[idx]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
600 tracks[idx].has_cue = 1;
601 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
602 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
603 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
604 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
605 if (entry[j].duration != -1)
606 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
607 end_ebml_master(dyn_cp, track_positions);
610 end_ebml_master(dyn_cp, cuepoint);
612 end_ebml_master_crc32(pb, &dyn_cp, mkv);
617 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
619 const uint8_t *header_start[3];
621 int first_header_size;
624 if (par->codec_id == AV_CODEC_ID_VORBIS)
625 first_header_size = 30;
627 first_header_size = 42;
629 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
630 first_header_size, header_start, header_len) < 0) {
631 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
635 avio_w8(pb, 2); // number packets - 1
636 for (j = 0; j < 2; j++) {
637 put_xiph_size(pb, header_len[j]);
639 for (j = 0; j < 3; j++)
640 avio_write(pb, header_start[j], header_len[j]);
645 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
647 if (par->extradata && par->extradata_size == 2)
648 avio_write(pb, par->extradata, 2);
650 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
654 static int put_flac_codecpriv(AVFormatContext *s,
655 AVIOContext *pb, AVCodecParameters *par)
657 int write_comment = (par->channel_layout &&
658 !(par->channel_layout & ~0x3ffffULL) &&
659 !ff_flac_is_native_layout(par->channel_layout));
660 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
667 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
668 "Lavf" : LIBAVFORMAT_IDENT;
669 AVDictionary *dict = NULL;
670 uint8_t buf[32], *data, *p;
673 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
674 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
676 len = ff_vorbiscomment_length(dict, vendor, NULL, 0);
677 if (len >= ((1<<24) - 4)) {
679 return AVERROR(EINVAL);
682 data = av_malloc(len + 4);
685 return AVERROR(ENOMEM);
689 AV_WB24(data + 1, len);
692 ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0);
694 avio_write(pb, data, len + 4);
703 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
704 int *sample_rate, int *output_sample_rate)
706 MPEG4AudioConfig mp4ac;
709 ret = avpriv_mpeg4audio_get_config2(&mp4ac, extradata, extradata_size, 1, s);
710 /* Don't abort if the failure is because of missing extradata. Assume in that
711 * case a bitstream filter will provide the muxer with the extradata in the
713 * Abort however if s->pb is not seekable, as we would not be able to seek back
714 * to write the sample rate elements once the extradata shows up, anyway. */
715 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
716 av_log(s, AV_LOG_ERROR,
717 "Error parsing AAC extradata, unable to determine samplerate.\n");
718 return AVERROR(EINVAL);
722 /* This will only happen when this function is called while writing the
723 * header and no extradata is available. The space for this element has
724 * to be reserved for when this function is called again after the
725 * extradata shows up in the first packet, as there's no way to know if
726 * output_sample_rate will be different than sample_rate or not. */
727 *output_sample_rate = *sample_rate;
729 *sample_rate = mp4ac.sample_rate;
730 *output_sample_rate = mp4ac.ext_sample_rate;
735 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
736 AVCodecParameters *par,
739 switch (par->codec_id) {
740 case AV_CODEC_ID_VORBIS:
741 case AV_CODEC_ID_THEORA:
742 return put_xiph_codecpriv(s, dyn_cp, par);
743 case AV_CODEC_ID_FLAC:
744 return put_flac_codecpriv(s, dyn_cp, par);
745 case AV_CODEC_ID_WAVPACK:
746 return put_wv_codecpriv(dyn_cp, par);
747 case AV_CODEC_ID_H264:
748 return ff_isom_write_avcc(dyn_cp, par->extradata,
749 par->extradata_size);
750 case AV_CODEC_ID_HEVC:
751 return ff_isom_write_hvcc(dyn_cp, par->extradata,
752 par->extradata_size, 0);
753 case AV_CODEC_ID_AV1:
754 if (par->extradata_size)
755 return ff_isom_write_av1c(dyn_cp, par->extradata,
756 par->extradata_size);
758 put_ebml_void(pb, 4 + 3);
760 case AV_CODEC_ID_ALAC:
761 if (par->extradata_size < 36) {
762 av_log(s, AV_LOG_ERROR,
763 "Invalid extradata found, ALAC expects a 36-byte "
765 return AVERROR_INVALIDDATA;
767 avio_write(dyn_cp, par->extradata + 12,
768 par->extradata_size - 12);
770 case AV_CODEC_ID_AAC:
771 if (par->extradata_size)
772 avio_write(dyn_cp, par->extradata, par->extradata_size);
774 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
777 if (par->codec_id == AV_CODEC_ID_PRORES &&
778 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
779 avio_wl32(dyn_cp, par->codec_tag);
780 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
781 avio_write(dyn_cp, par->extradata, par->extradata_size);
787 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
788 AVCodecParameters *par,
789 int native_id, int qt_id)
793 int ret, codecpriv_size;
795 ret = avio_open_dyn_buf(&dyn_cp);
800 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
801 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
804 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
806 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
807 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
810 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
811 avio_wl32(dyn_cp, par->codec_tag);
812 for(i = 0; i < 0x5a - 8; i++)
815 avio_write(dyn_cp, par->extradata, par->extradata_size);
817 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
818 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
819 avcodec_get_name(par->codec_id));
822 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
824 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
825 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
826 avcodec_get_name(par->codec_id));
827 ret = AVERROR(EINVAL);
830 ff_put_bmp_header(dyn_cp, par, 0, 0);
832 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
834 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
836 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
837 avcodec_get_name(par->codec_id));
838 ret = AVERROR(EINVAL);
841 par->codec_tag = tag;
843 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
846 codecpriv_size = avio_get_dyn_buf(dyn_cp, &codecpriv);
848 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
850 ffio_free_dyn_buf(&dyn_cp);
854 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
856 uint8_t *colorinfo_ptr;
857 int side_data_size = 0;
858 int ret, colorinfo_size;
859 const uint8_t *side_data;
861 ret = avio_open_dyn_buf(&dyn_cp);
865 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
866 par->color_trc < AVCOL_TRC_NB) {
867 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
870 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
871 par->color_space < AVCOL_SPC_NB) {
872 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
874 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
875 par->color_primaries < AVCOL_PRI_NB) {
876 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
878 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
879 par->color_range < AVCOL_RANGE_NB) {
880 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
882 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
883 par->chroma_location <= AVCHROMA_LOC_TOP) {
886 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
887 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
888 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
891 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
893 if (side_data_size) {
894 const AVContentLightMetadata *metadata =
895 (const AVContentLightMetadata*)side_data;
896 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
897 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
900 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
902 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
903 ebml_master meta_element = start_ebml_master(
904 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
905 const AVMasteringDisplayMetadata *metadata =
906 (const AVMasteringDisplayMetadata*)side_data;
907 if (metadata->has_primaries) {
908 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
909 av_q2d(metadata->display_primaries[0][0]));
910 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
911 av_q2d(metadata->display_primaries[0][1]));
912 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
913 av_q2d(metadata->display_primaries[1][0]));
914 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
915 av_q2d(metadata->display_primaries[1][1]));
916 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
917 av_q2d(metadata->display_primaries[2][0]));
918 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
919 av_q2d(metadata->display_primaries[2][1]));
920 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
921 av_q2d(metadata->white_point[0]));
922 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
923 av_q2d(metadata->white_point[1]));
925 if (metadata->has_luminance) {
926 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
927 av_q2d(metadata->max_luminance));
928 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
929 av_q2d(metadata->min_luminance));
931 end_ebml_master(dyn_cp, meta_element);
934 colorinfo_size = avio_get_dyn_buf(dyn_cp, &colorinfo_ptr);
935 if (colorinfo_size) {
936 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
937 avio_write(pb, colorinfo_ptr, colorinfo_size);
938 end_ebml_master(pb, colorinfo);
940 ffio_free_dyn_buf(&dyn_cp);
944 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
949 int side_data_size = 0;
950 int ret, projection_size;
951 uint8_t *projection_ptr;
954 const AVSphericalMapping *spherical =
955 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
961 ret = avio_open_dyn_buf(&dyn_cp);
965 switch (spherical->projection) {
966 case AV_SPHERICAL_EQUIRECTANGULAR:
967 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
968 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
970 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
971 ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL);
972 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
973 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
974 avio_wb32(&b, 0); // version + flags
975 avio_wb32(&b, spherical->bound_top);
976 avio_wb32(&b, spherical->bound_bottom);
977 avio_wb32(&b, spherical->bound_left);
978 avio_wb32(&b, spherical->bound_right);
979 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
980 private, avio_tell(&b));
982 case AV_SPHERICAL_CUBEMAP:
983 ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL);
984 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
985 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
986 avio_wb32(&b, 0); // version + flags
987 avio_wb32(&b, 0); // layout
988 avio_wb32(&b, spherical->padding);
989 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
990 private, avio_tell(&b));
993 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
998 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
999 (double) spherical->yaw / (1 << 16));
1000 if (spherical->pitch)
1001 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
1002 (double) spherical->pitch / (1 << 16));
1003 if (spherical->roll)
1004 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
1005 (double) spherical->roll / (1 << 16));
1008 projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr);
1009 if (projection_size) {
1010 ebml_master projection = start_ebml_master(pb,
1011 MATROSKA_ID_VIDEOPROJECTION,
1013 avio_write(pb, projection_ptr, projection_size);
1014 end_ebml_master(pb, projection);
1016 av_freep(&projection_ptr);
1021 static void mkv_write_field_order(AVIOContext *pb, int mode,
1022 enum AVFieldOrder field_order)
1024 switch (field_order) {
1025 case AV_FIELD_UNKNOWN:
1027 case AV_FIELD_PROGRESSIVE:
1028 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1029 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1035 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1036 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1037 if (mode != MODE_WEBM) {
1038 switch (field_order) {
1040 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1041 MATROSKA_VIDEO_FIELDORDER_TT);
1044 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1045 MATROSKA_VIDEO_FIELDORDER_BB);
1048 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1049 MATROSKA_VIDEO_FIELDORDER_TB);
1052 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1053 MATROSKA_VIDEO_FIELDORDER_BT);
1060 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1061 AVStream *st, int mode, int *h_width, int *h_height)
1065 AVDictionaryEntry *tag;
1066 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1070 // convert metadata into proper side data and add it to the stream
1071 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1072 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1073 int stereo_mode = atoi(tag->value);
1075 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1076 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1081 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1082 stereo_mode != 10 && stereo_mode != 12) {
1083 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1089 // iterate to find the stereo3d side data
1090 for (i = 0; i < st->nb_side_data; i++) {
1091 AVPacketSideData sd = st->side_data[i];
1092 if (sd.type == AV_PKT_DATA_STEREO3D) {
1093 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1095 switch (stereo->type) {
1096 case AV_STEREO3D_2D:
1097 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1099 case AV_STEREO3D_SIDEBYSIDE:
1100 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1101 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1102 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1105 case AV_STEREO3D_TOPBOTTOM:
1106 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1107 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1111 case AV_STEREO3D_CHECKERBOARD:
1112 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1113 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1116 case AV_STEREO3D_LINES:
1117 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1118 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1122 case AV_STEREO3D_COLUMNS:
1123 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1124 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1128 case AV_STEREO3D_FRAMESEQUENCE:
1129 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1130 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1138 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1141 // if webm, do not write unsupported modes
1142 if ((mode == MODE_WEBM &&
1143 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1144 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1145 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1146 av_log(s, AV_LOG_ERROR,
1147 "The specified stereo mode is not valid.\n");
1148 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1149 return AVERROR(EINVAL);
1152 // write StereoMode if format is valid
1153 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1158 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1159 int i, AVIOContext *pb, int default_stream_exists)
1161 AVStream *st = s->streams[i];
1162 AVCodecParameters *par = st->codecpar;
1163 ebml_master subinfo, track;
1166 int bit_depth = av_get_bits_per_sample(par->codec_id);
1167 int sample_rate = par->sample_rate;
1168 int output_sample_rate = 0;
1169 int display_width_div = 1;
1170 int display_height_div = 1;
1172 AVDictionaryEntry *tag;
1174 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1175 mkv->have_attachments = 1;
1179 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1180 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1181 if (par->bits_per_raw_sample)
1182 bit_depth = par->bits_per_raw_sample;
1184 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1187 bit_depth = par->bits_per_coded_sample;
1190 if (par->codec_id == AV_CODEC_ID_AAC) {
1191 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1192 &output_sample_rate);
1197 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1198 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1199 mkv->is_dash ? mkv->dash_track_number : i + 1);
1200 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1201 mkv->is_dash ? mkv->dash_track_number : i + 1);
1202 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1204 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1205 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1206 tag = av_dict_get(st->metadata, "language", NULL, 0);
1207 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1208 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1209 } else if (tag && tag->value) {
1210 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1213 // The default value for TRACKFLAGDEFAULT is 1, so add element
1214 // if we need to clear it.
1215 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1216 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1218 if (st->disposition & AV_DISPOSITION_FORCED)
1219 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1221 if (mkv->mode == MODE_WEBM) {
1222 const char *codec_id;
1223 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1224 for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1225 if (ff_webm_codec_tags[j].id == par->codec_id) {
1226 codec_id = ff_webm_codec_tags[j].str;
1231 } else if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1232 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1233 codec_id = "D_WEBVTT/CAPTIONS";
1234 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1235 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1236 codec_id = "D_WEBVTT/DESCRIPTIONS";
1237 native_id = MATROSKA_TRACK_TYPE_METADATA;
1238 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1239 codec_id = "D_WEBVTT/METADATA";
1240 native_id = MATROSKA_TRACK_TYPE_METADATA;
1242 codec_id = "D_WEBVTT/SUBTITLES";
1243 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1248 av_log(s, AV_LOG_ERROR,
1249 "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1250 return AVERROR(EINVAL);
1253 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1255 // look for a codec ID string specific to mkv to use,
1256 // if none are found, use AVI codes
1257 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1258 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1259 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1260 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1266 if (mkv->allow_raw_vfw) {
1269 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1270 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1271 return AVERROR(EINVAL);
1276 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1277 int64_t codecdelay = av_rescale_q(par->initial_padding,
1278 (AVRational){ 1, 48000 },
1279 (AVRational){ 1, 1000000000 });
1280 if (codecdelay < 0) {
1281 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1282 return AVERROR(EINVAL);
1284 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1285 // (AVRational){ 1, par->sample_rate },
1288 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1290 if (par->codec_id == AV_CODEC_ID_OPUS) {
1291 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1294 switch (par->codec_type) {
1295 case AVMEDIA_TYPE_VIDEO:
1296 mkv->have_video = 1;
1297 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1299 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1300 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1301 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1302 else if( st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0
1303 && av_cmp_q(av_inv_q(st->r_frame_rate), st->time_base) > 0)
1304 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->r_frame_rate.den / st->r_frame_rate.num);
1307 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1308 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1309 par->codec_id == AV_CODEC_ID_SVQ1 ||
1310 par->codec_id == AV_CODEC_ID_SVQ3 ||
1311 par->codec_id == AV_CODEC_ID_CINEPAK))
1315 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1316 else if (!native_id) {
1317 // if there is no mkv-specific codec ID, use VFW mode
1318 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1319 mkv->tracks[i].write_dts = 1;
1320 s->internal->avoid_negative_ts_use_pts = 0;
1323 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1325 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1326 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1328 mkv_write_field_order(pb, mkv->mode, par->field_order);
1330 // check both side data and metadata for stereo information,
1331 // write the result to the bitstream if any is found
1332 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1334 &display_height_div);
1338 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1339 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1340 (par->format == AV_PIX_FMT_YUVA420P)) {
1341 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1344 // write DisplayWidth and DisplayHeight, they contain the size of
1345 // a single source view and/or the display aspect ratio
1346 if (st->sample_aspect_ratio.num) {
1347 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1348 if (d_width > INT_MAX) {
1349 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1350 return AVERROR(EINVAL);
1352 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1353 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1354 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1355 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1357 AVRational display_aspect_ratio;
1358 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1359 par->width * (int64_t)st->sample_aspect_ratio.num,
1360 par->height * (int64_t)st->sample_aspect_ratio.den,
1362 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1363 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1364 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1367 } else if (display_width_div != 1 || display_height_div != 1) {
1368 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1369 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1370 } else if (mkv->mode != MODE_WEBM)
1371 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1373 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1374 uint32_t color_space = av_le2ne32(par->codec_tag);
1375 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1377 ret = mkv_write_video_color(pb, par, st);
1380 ret = mkv_write_video_projection(s, pb, st);
1383 end_ebml_master(pb, subinfo);
1386 case AVMEDIA_TYPE_AUDIO:
1387 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1390 // no mkv-specific ID, use ACM mode
1391 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1393 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1394 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1396 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1397 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1398 if (output_sample_rate)
1399 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1401 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1402 end_ebml_master(pb, subinfo);
1405 case AVMEDIA_TYPE_SUBTITLE:
1407 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1408 return AVERROR(ENOSYS);
1411 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1412 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1414 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1417 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1418 return AVERROR(EINVAL);
1421 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1422 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1423 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1428 end_ebml_master(pb, track);
1433 static int mkv_write_tracks(AVFormatContext *s)
1435 MatroskaMuxContext *mkv = s->priv_data;
1436 AVIOContext *pb = s->pb;
1437 int i, ret, default_stream_exists = 0;
1439 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1443 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, MATROSKA_ID_TRACKS);
1447 for (i = 0; i < s->nb_streams; i++) {
1448 AVStream *st = s->streams[i];
1449 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1451 for (i = 0; i < s->nb_streams; i++) {
1452 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1457 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1458 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, &mkv->tracks_pos);
1460 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
1465 static int mkv_write_chapters(AVFormatContext *s)
1467 MatroskaMuxContext *mkv = s->priv_data;
1468 AVIOContext *dyn_cp, *pb = s->pb;
1469 ebml_master editionentry;
1470 AVRational scale = {1, 1E9};
1473 if (!s->nb_chapters || mkv->wrote_chapters)
1476 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1477 if (ret < 0) return ret;
1479 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_CHAPTERS);
1480 if (ret < 0) return ret;
1482 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1483 if (mkv->mode != MODE_WEBM) {
1484 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1485 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1487 for (i = 0; i < s->nb_chapters; i++) {
1488 ebml_master chapteratom, chapterdisplay;
1489 AVChapter *c = s->chapters[i];
1490 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1491 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1492 AVDictionaryEntry *t = NULL;
1493 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1494 av_log(s, AV_LOG_ERROR,
1495 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1496 chapterstart, chapterend);
1497 return AVERROR_INVALIDDATA;
1500 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1501 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1502 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1503 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1504 if (mkv->mode != MODE_WEBM) {
1505 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1506 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1508 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1509 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1510 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1511 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1512 end_ebml_master(dyn_cp, chapterdisplay);
1514 end_ebml_master(dyn_cp, chapteratom);
1516 end_ebml_master(dyn_cp, editionentry);
1517 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1519 mkv->wrote_chapters = 1;
1523 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1525 uint8_t *key = av_strdup(t->key);
1527 const uint8_t *lang = NULL;
1531 return AVERROR(ENOMEM);
1533 if ((p = strrchr(p, '-')) &&
1534 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1541 else if (*p >= 'a' && *p <= 'z')
1546 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1547 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1549 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1550 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1551 end_ebml_master(pb, tag);
1557 static int mkv_write_tag_targets(AVFormatContext *s, uint32_t elementid,
1558 unsigned int uid, ebml_master *tag)
1561 MatroskaMuxContext *mkv = s->priv_data;
1562 ebml_master targets;
1565 if (!mkv->tags_bc) {
1566 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1567 if (ret < 0) return ret;
1569 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, MATROSKA_ID_TAGS);
1573 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1574 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1576 put_ebml_uint(pb, elementid, uid);
1577 end_ebml_master(pb, targets);
1581 static int mkv_check_tag_name(const char *name, uint32_t elementid)
1583 return av_strcasecmp(name, "title") &&
1584 av_strcasecmp(name, "stereo_mode") &&
1585 av_strcasecmp(name, "creation_time") &&
1586 av_strcasecmp(name, "encoding_tool") &&
1587 av_strcasecmp(name, "duration") &&
1588 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1589 av_strcasecmp(name, "language")) &&
1590 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1591 (av_strcasecmp(name, "filename") &&
1592 av_strcasecmp(name, "mimetype")));
1595 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, uint32_t elementid,
1598 MatroskaMuxContext *mkv = s->priv_data;
1601 AVDictionaryEntry *t = NULL;
1603 ret = mkv_write_tag_targets(s, elementid, uid, &tag);
1607 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1608 if (mkv_check_tag_name(t->key, elementid)) {
1609 ret = mkv_write_simpletag(mkv->tags_bc, t);
1615 end_ebml_master(mkv->tags_bc, tag);
1619 static int mkv_check_tag(AVDictionary *m, uint32_t elementid)
1621 AVDictionaryEntry *t = NULL;
1623 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1624 if (mkv_check_tag_name(t->key, elementid))
1630 static int mkv_write_tags(AVFormatContext *s)
1632 MatroskaMuxContext *mkv = s->priv_data;
1635 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1637 if (mkv_check_tag(s->metadata, 0)) {
1638 ret = mkv_write_tag(s, s->metadata, 0, 0);
1639 if (ret < 0) return ret;
1642 for (i = 0; i < s->nb_streams; i++) {
1643 AVStream *st = s->streams[i];
1645 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1648 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1651 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1);
1652 if (ret < 0) return ret;
1655 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1656 for (i = 0; i < s->nb_streams; i++) {
1658 AVStream *st = s->streams[i];
1659 ebml_master tag_target;
1662 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1665 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tag_target);
1668 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1669 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1670 mkv->tracks[i].duration_offset = avio_tell(pb);
1672 // Reserve space to write duration as a 20-byte string.
1673 // 2 (ebml id) + 1 (data size) + 20 (data)
1674 put_ebml_void(pb, 23);
1675 end_ebml_master(pb, tag);
1676 end_ebml_master(pb, tag_target);
1680 if (mkv->mode != MODE_WEBM) {
1681 for (i = 0; i < s->nb_chapters; i++) {
1682 AVChapter *ch = s->chapters[i];
1684 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1687 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset);
1693 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1694 for (i = 0; i < mkv->attachments->num_entries; i++) {
1695 mkv_attachment *attachment = &mkv->attachments->entries[i];
1696 AVStream *st = s->streams[attachment->stream_idx];
1698 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1701 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid);
1708 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1709 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, &mkv->tags_pos);
1711 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv);
1716 static int mkv_write_attachments(AVFormatContext *s)
1718 MatroskaMuxContext *mkv = s->priv_data;
1719 AVIOContext *dyn_cp, *pb = s->pb;
1723 if (!mkv->have_attachments)
1726 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1727 if (!mkv->attachments)
1728 return AVERROR(ENOMEM);
1730 av_lfg_init(&c, av_get_random_seed());
1732 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1733 if (ret < 0) return ret;
1735 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, MATROSKA_ID_ATTACHMENTS);
1736 if (ret < 0) return ret;
1738 for (i = 0; i < s->nb_streams; i++) {
1739 AVStream *st = s->streams[i];
1740 ebml_master attached_file;
1741 mkv_attachment *attachment = mkv->attachments->entries;
1742 AVDictionaryEntry *t;
1743 const char *mimetype = NULL;
1746 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1749 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1751 return AVERROR(ENOMEM);
1752 mkv->attachments->entries = attachment;
1754 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1756 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1757 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1758 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1759 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1760 return AVERROR(EINVAL);
1762 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1763 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1764 mimetype = t->value;
1765 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1767 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1768 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1769 mimetype = ff_mkv_mime_tags[i].str;
1772 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1773 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1774 mimetype = ff_mkv_image_mime_tags[i].str;
1779 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1780 "it cannot be deduced from the codec id.\n", i);
1781 return AVERROR(EINVAL);
1784 if (s->flags & AVFMT_FLAG_BITEXACT) {
1785 struct AVSHA *sha = av_sha_alloc();
1788 return AVERROR(ENOMEM);
1789 av_sha_init(sha, 160);
1790 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1791 av_sha_final(sha, digest);
1793 fileuid = AV_RL32(digest);
1795 fileuid = av_lfg_get(&c);
1797 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1798 fileuid, mkv->attachments->num_entries);
1800 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1801 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1802 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1803 end_ebml_master(dyn_cp, attached_file);
1805 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1806 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1808 end_ebml_master_crc32(pb, &dyn_cp, mkv);
1813 static int64_t get_metadata_duration(AVFormatContext *s)
1819 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1820 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1821 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1825 for (i = 0; i < s->nb_streams; i++) {
1827 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1829 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1830 max = FFMAX(max, us);
1833 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1837 static int mkv_write_header(AVFormatContext *s)
1839 MatroskaMuxContext *mkv = s->priv_data;
1840 AVIOContext *pb = s->pb;
1841 ebml_master ebml_header;
1842 AVDictionaryEntry *tag;
1843 int ret, i, version = 2;
1844 int64_t creation_time;
1846 if (!strcmp(s->oformat->name, "webm")) {
1847 mkv->mode = MODE_WEBM;
1850 mkv->mode = MODE_MATROSKAv2;
1852 if (mkv->mode != MODE_WEBM ||
1853 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1854 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1857 for (i = 0; i < s->nb_streams; i++) {
1858 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1859 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1860 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1864 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1866 return AVERROR(ENOMEM);
1868 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, MAX_EBML_HEADER_SIZE);
1869 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1870 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1871 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1872 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1873 put_ebml_string(pb, EBML_ID_DOCTYPE , s->oformat->name);
1874 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1875 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION, 2);
1876 end_ebml_master(pb, ebml_header);
1878 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1879 mkv->segment_offset = avio_tell(pb);
1881 // we write a seek head at the beginning to point to all other level
1882 // one elements, which aren't more than 10 elements as we write only one
1883 // of every other currently defined level 1 element
1884 mkv->seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1885 if (!mkv->seekhead) {
1886 return AVERROR(ENOMEM);
1889 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1893 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, MATROSKA_ID_INFO);
1898 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1899 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1900 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1901 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1902 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1903 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1904 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1906 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1908 if (mkv->mode != MODE_WEBM) {
1909 uint32_t segment_uid[4];
1912 av_lfg_init(&lfg, av_get_random_seed());
1914 for (i = 0; i < 4; i++)
1915 segment_uid[i] = av_lfg_get(&lfg);
1917 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1920 const char *ident = "Lavf";
1921 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1922 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1925 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1926 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1927 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1928 uint8_t date_utc_buf[8];
1929 AV_WB64(date_utc_buf, date_utc);
1930 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1933 // reserve space for the duration
1935 mkv->duration_offset = avio_tell(pb);
1936 if (!mkv->is_live) {
1937 int64_t metadata_duration = get_metadata_duration(s);
1939 if (s->duration > 0) {
1940 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1941 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1942 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1943 } else if (metadata_duration > 0) {
1944 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1945 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1946 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1948 put_ebml_void(pb, 11); // assumes double-precision float to be written
1951 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1952 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, &mkv->info_pos);
1954 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv);
1957 ret = mkv_write_tracks(s);
1961 for (i = 0; i < s->nb_chapters; i++)
1962 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1964 ret = mkv_write_chapters(s);
1968 if (mkv->mode != MODE_WEBM) {
1969 ret = mkv_write_attachments(s);
1974 ret = mkv_write_tags(s);
1978 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1979 mkv_write_seekhead(pb, mkv);
1981 mkv->cues = mkv_start_cues(mkv->segment_offset);
1983 return AVERROR(ENOMEM);
1986 if (s->metadata_header_padding > 0) {
1987 if (s->metadata_header_padding == 1)
1988 s->metadata_header_padding++;
1989 put_ebml_void(pb, s->metadata_header_padding);
1992 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
1993 mkv->cues_pos = avio_tell(pb);
1994 if (mkv->reserve_cues_space == 1)
1995 mkv->reserve_cues_space++;
1996 put_ebml_void(pb, mkv->reserve_cues_space);
1999 av_init_packet(&mkv->cur_audio_pkt);
2000 mkv->cur_audio_pkt.size = 0;
2001 mkv->cluster_pos = -1;
2003 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2004 // after 4k and on a keyframe
2005 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
2006 if (mkv->cluster_time_limit < 0)
2007 mkv->cluster_time_limit = 5000;
2008 if (mkv->cluster_size_limit < 0)
2009 mkv->cluster_size_limit = 5 * 1024 * 1024;
2011 if (mkv->cluster_time_limit < 0)
2012 mkv->cluster_time_limit = 1000;
2013 if (mkv->cluster_size_limit < 0)
2014 mkv->cluster_size_limit = 32 * 1024;
2020 static int mkv_blockgroup_size(int pkt_size)
2022 int size = pkt_size + 4;
2023 size += ebml_num_size(size);
2024 size += 2; // EBML ID for block and block duration
2025 size += 9; // max size of block duration incl. length field
2029 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
2036 dst = av_malloc(srclen);
2038 return AVERROR(ENOMEM);
2040 while (srclen >= WV_HEADER_SIZE) {
2043 ret = ff_wv_parse_header(&header, src);
2046 src += WV_HEADER_SIZE;
2047 srclen -= WV_HEADER_SIZE;
2049 if (srclen < header.blocksize) {
2050 ret = AVERROR_INVALIDDATA;
2054 if (header.initial) {
2055 AV_WL32(dst + offset, header.samples);
2058 AV_WL32(dst + offset, header.flags);
2059 AV_WL32(dst + offset + 4, header.crc);
2062 if (!(header.initial && header.final)) {
2063 AV_WL32(dst + offset, header.blocksize);
2067 memcpy(dst + offset, src, header.blocksize);
2068 src += header.blocksize;
2069 srclen -= header.blocksize;
2070 offset += header.blocksize;
2082 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2083 uint32_t blockid, AVPacket *pkt, int keyframe)
2085 MatroskaMuxContext *mkv = s->priv_data;
2086 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2087 mkv_track *track = &mkv->tracks[pkt->stream_index];
2088 uint8_t *data = NULL, *side_data = NULL;
2089 int offset = 0, size = pkt->size, side_data_size = 0;
2090 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2091 uint64_t additional_id = 0;
2092 int64_t discard_padding = 0;
2093 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2094 ebml_master block_group, block_additions, block_more;
2096 ts += track->ts_offset;
2098 /* The following string is identical to the one in mkv_write_vtt_blocks
2099 * so that only one copy needs to exist in binaries. */
2100 av_log(s, AV_LOG_DEBUG,
2101 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2102 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2103 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2104 pkt->size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2105 mkv->cluster_pos, track_number, keyframe != 0);
2106 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2107 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2108 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2109 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2110 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2111 /* extradata is Annex B, assume the bitstream is too and convert it */
2112 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2113 else if (par->codec_id == AV_CODEC_ID_AV1)
2114 ff_av1_filter_obus_buf(pkt->data, &data, &size);
2115 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2116 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
2118 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
2124 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2125 /* Matroska specification requires to remove the first QuickTime atom
2131 side_data = av_packet_get_side_data(pkt,
2132 AV_PKT_DATA_SKIP_SAMPLES,
2135 if (side_data && side_data_size >= 10) {
2136 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2137 (AVRational){1, par->sample_rate},
2138 (AVRational){1, 1000000000});
2141 side_data = av_packet_get_side_data(pkt,
2142 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2145 additional_id = AV_RB64(side_data);
2147 side_data_size -= 8;
2150 if ((side_data_size && additional_id == 1) || discard_padding) {
2151 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2152 blockid = MATROSKA_ID_BLOCK;
2155 put_ebml_id(pb, blockid);
2156 put_ebml_num(pb, size + 4, 0);
2157 // this assumes stream_index is less than 126
2158 avio_w8(pb, 0x80 | track_number);
2159 avio_wb16(pb, ts - mkv->cluster_pts);
2160 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2161 avio_write(pb, data + offset, size);
2162 if (data != pkt->data)
2165 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2166 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, track->last_timestamp);
2168 track->last_timestamp = ts - mkv->cluster_pts;
2170 if (discard_padding) {
2171 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2174 if (side_data_size && additional_id == 1) {
2175 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2176 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2177 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2178 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2179 put_ebml_num(pb, side_data_size, 0);
2180 avio_write(pb, side_data, side_data_size);
2181 end_ebml_master(pb, block_more);
2182 end_ebml_master(pb, block_additions);
2184 if ((side_data_size && additional_id == 1) || discard_padding) {
2185 end_ebml_master(pb, block_group);
2189 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2191 MatroskaMuxContext *mkv = s->priv_data;
2192 ebml_master blockgroup;
2193 int id_size, settings_size, size;
2194 uint8_t *id, *settings;
2195 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2196 const int flags = 0;
2199 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2203 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2206 size = id_size + 1 + settings_size + 1 + pkt->size;
2208 /* The following string is identical to the one in mkv_write_block so that
2209 * only one copy needs to exist in binaries. */
2210 av_log(s, AV_LOG_DEBUG,
2211 "Writing block of size %d with pts %" PRId64 ", dts %" PRId64 ", "
2212 "duration %" PRId64 " at relative offset %" PRId64 " in cluster "
2213 "at offset %" PRId64 ". TrackNumber %d, keyframe %d\n",
2214 size, pkt->pts, pkt->dts, pkt->duration, avio_tell(pb),
2215 mkv->cluster_pos, pkt->stream_index + 1, 1);
2217 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2219 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2220 put_ebml_num(pb, size + 4, 0);
2221 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2222 avio_wb16(pb, ts - mkv->cluster_pts);
2224 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2226 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2227 end_ebml_master(pb, blockgroup);
2229 return pkt->duration;
2232 static void mkv_end_cluster(AVFormatContext *s)
2234 MatroskaMuxContext *mkv = s->priv_data;
2236 end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv);
2237 mkv->cluster_pos = -1;
2241 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2243 MatroskaMuxContext *mkv = s->priv_data;
2244 mkv_track *track = &mkv->tracks[pkt->stream_index];
2245 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2247 int side_data_size = 0, ret;
2249 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2252 switch (par->codec_id) {
2253 case AV_CODEC_ID_AAC:
2254 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2255 int filler, output_sample_rate = 0;
2257 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2258 &output_sample_rate);
2261 if (!output_sample_rate)
2262 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2263 ret = ff_alloc_extradata(par, side_data_size);
2266 memcpy(par->extradata, side_data, side_data_size);
2267 curpos = avio_tell(mkv->tracks_bc);
2268 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2269 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2270 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2272 put_ebml_void(mkv->tracks_bc, filler);
2273 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2274 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2275 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2276 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2277 } else if (!par->extradata_size && !track->sample_rate) {
2278 // No extradata (codecpar or packet side data).
2279 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2280 return AVERROR(EINVAL);
2283 case AV_CODEC_ID_FLAC:
2284 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2285 AVCodecParameters *codecpriv_par;
2287 if (side_data_size != par->extradata_size) {
2288 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2290 return AVERROR(EINVAL);
2292 codecpriv_par = avcodec_parameters_alloc();
2294 return AVERROR(ENOMEM);
2295 ret = avcodec_parameters_copy(codecpriv_par, par);
2297 avcodec_parameters_free(&codecpriv_par);
2300 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2301 curpos = avio_tell(mkv->tracks_bc);
2302 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2303 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2304 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2305 avcodec_parameters_free(&codecpriv_par);
2308 // FIXME: Remove the following once libaom starts propagating extradata during init()
2309 // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012
2310 case AV_CODEC_ID_AV1:
2311 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live &&
2312 !par->extradata_size) {
2313 AVIOContext *dyn_cp;
2317 ret = avio_open_dyn_buf(&dyn_cp);
2320 ff_isom_write_av1c(dyn_cp, side_data, side_data_size);
2321 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
2322 if (!codecpriv_size) {
2324 return AVERROR_INVALIDDATA;
2326 curpos = avio_tell(mkv->tracks_bc);
2327 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2328 // Do not write the OBUs as we don't have space saved for them
2329 put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4);
2331 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2332 ret = ff_alloc_extradata(par, side_data_size);
2335 memcpy(par->extradata, side_data, side_data_size);
2336 } else if (!par->extradata_size)
2337 return AVERROR_INVALIDDATA;
2341 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2348 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2350 MatroskaMuxContext *mkv = s->priv_data;
2352 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2353 mkv_track *track = &mkv->tracks[pkt->stream_index];
2354 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2355 int duration = pkt->duration;
2357 int64_t ts = track->write_dts ? pkt->dts : pkt->pts;
2358 int64_t relative_packet_pos;
2359 int tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2361 if (ts == AV_NOPTS_VALUE) {
2362 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2363 return AVERROR(EINVAL);
2365 ts += track->ts_offset;
2367 if (mkv->cluster_pos != -1) {
2368 int64_t cluster_time = ts - mkv->cluster_pts;
2369 if ((int16_t)cluster_time != cluster_time) {
2371 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2375 if (mkv->cluster_pos == -1) {
2376 mkv->cluster_pos = avio_tell(s->pb);
2377 ret = start_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER);
2380 put_ebml_uint(mkv->cluster_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2381 mkv->cluster_pts = FFMAX(0, ts);
2382 av_log(s, AV_LOG_DEBUG,
2383 "Starting new cluster with timestamp "
2384 "%" PRId64 " at offset %" PRId64 " bytes\n",
2385 mkv->cluster_pts, mkv->cluster_pos);
2387 pb = mkv->cluster_bc;
2389 relative_packet_pos = avio_tell(pb);
2391 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2392 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2393 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2394 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2395 if (ret < 0) return ret;
2398 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2399 duration = mkv_write_vtt_blocks(s, pb, pkt);
2401 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2402 mkv_blockgroup_size(pkt->size));
2404 #if FF_API_CONVERGENCE_DURATION
2405 FF_DISABLE_DEPRECATION_WARNINGS
2406 /* For backward compatibility, prefer convergence_duration. */
2407 if (pkt->convergence_duration > 0) {
2408 duration = pkt->convergence_duration;
2410 FF_ENABLE_DEPRECATION_WARNINGS
2412 /* All subtitle blocks are considered to be keyframes. */
2413 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2414 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2415 end_ebml_master(pb, blockgroup);
2418 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2419 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, tracknum, ts,
2420 mkv->cluster_pos, relative_packet_pos, duration);
2426 mkv->duration = FFMAX(mkv->duration, ts + duration);
2427 track->duration = FFMAX(track->duration, ts + duration);
2432 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2434 MatroskaMuxContext *mkv = s->priv_data;
2435 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2436 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2438 int64_t cluster_time;
2440 int start_new_cluster;
2442 ret = mkv_check_new_extra_data(s, pkt);
2446 if (mkv->tracks[pkt->stream_index].write_dts)
2447 cluster_time = pkt->dts - mkv->cluster_pts;
2449 cluster_time = pkt->pts - mkv->cluster_pts;
2450 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2452 cluster_size = avio_tell(mkv->cluster_bc);
2454 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2455 // WebM DASH specification states that the first block of every cluster
2456 // has to be a key frame. So for DASH video, we only create a cluster
2457 // on seeing key frames.
2458 start_new_cluster = keyframe;
2459 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2460 (mkv->cluster_pos == -1 ||
2461 cluster_time > mkv->cluster_time_limit)) {
2462 // For DASH audio, we create a Cluster based on cluster_time_limit
2463 start_new_cluster = 1;
2464 } else if (!mkv->is_dash &&
2465 (cluster_size > mkv->cluster_size_limit ||
2466 cluster_time > mkv->cluster_time_limit ||
2467 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2468 cluster_size > 4 * 1024))) {
2469 start_new_cluster = 1;
2471 start_new_cluster = 0;
2474 if (mkv->cluster_pos != -1 && start_new_cluster) {
2478 if (!mkv->cluster_pos)
2479 avio_write_marker(s->pb,
2480 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2481 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2483 // check if we have an audio packet cached
2484 if (mkv->cur_audio_pkt.size > 0) {
2485 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2486 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2487 mkv->is_dash ? start_new_cluster : 0);
2488 av_packet_unref(&mkv->cur_audio_pkt);
2490 av_log(s, AV_LOG_ERROR,
2491 "Could not write cached audio packet ret:%d\n", ret);
2496 // buffer an audio packet to ensure the packet containing the video
2497 // keyframe's timecode is contained in the same cluster for WebM
2498 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2500 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2502 ret = mkv_write_packet_internal(s, pkt, 0);
2506 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2508 MatroskaMuxContext *mkv = s->priv_data;
2511 if (mkv->cluster_pos != -1) {
2513 av_log(s, AV_LOG_DEBUG,
2514 "Flushing cluster at offset %" PRIu64 " bytes\n",
2519 return mkv_write_packet(s, pkt);
2522 static int mkv_write_trailer(AVFormatContext *s)
2524 MatroskaMuxContext *mkv = s->priv_data;
2525 AVIOContext *pb = s->pb;
2526 int64_t currentpos, cuespos;
2529 // check if we have an audio packet cached
2530 if (mkv->cur_audio_pkt.size > 0) {
2531 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2533 av_log(s, AV_LOG_ERROR,
2534 "Could not write cached audio packet ret:%d\n", ret);
2539 if (mkv->cluster_bc) {
2540 end_ebml_master_crc32(pb, &mkv->cluster_bc, mkv);
2543 ret = mkv_write_chapters(s);
2548 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2549 if (mkv->cues->num_entries) {
2550 if (mkv->reserve_cues_space) {
2553 currentpos = avio_tell(pb);
2554 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2556 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2557 cues_end = avio_tell(pb);
2558 if (cues_end > cuespos + mkv->reserve_cues_space) {
2559 av_log(s, AV_LOG_ERROR,
2560 "Insufficient space reserved for cues: %d "
2561 "(needed: %" PRId64 ").\n",
2562 mkv->reserve_cues_space, cues_end - cuespos);
2563 return AVERROR(EINVAL);
2566 if (cues_end < cuespos + mkv->reserve_cues_space)
2567 put_ebml_void(pb, mkv->reserve_cues_space -
2568 (cues_end - cuespos));
2570 avio_seek(pb, currentpos, SEEK_SET);
2572 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2575 ret = mkv_add_seekhead_entry(mkv->seekhead, MATROSKA_ID_CUES,
2581 mkv_write_seekhead(pb, mkv);
2583 // update the duration
2584 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2585 currentpos = avio_tell(pb);
2586 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2587 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2588 avio_seek(pb, mkv->info_pos, SEEK_SET);
2589 end_ebml_master_crc32(pb, &mkv->info_bc, mkv);
2591 // write tracks master
2592 avio_seek(pb, mkv->tracks_pos, SEEK_SET);
2593 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv);
2595 // update stream durations
2596 if (!mkv->is_live) {
2598 int64_t curr = avio_tell(mkv->tags_bc);
2599 for (i = 0; i < s->nb_streams; ++i) {
2600 AVStream *st = s->streams[i];
2601 mkv_track *track = &mkv->tracks[i];
2603 if (track->duration_offset > 0) {
2604 double duration_sec = track->duration * av_q2d(st->time_base);
2605 char duration_string[20] = "";
2607 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2610 avio_seek(mkv->tags_bc, track->duration_offset, SEEK_SET);
2612 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2613 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2614 fmod(duration_sec, 60));
2616 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2619 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2621 if (mkv->tags_bc && !mkv->is_live) {
2622 avio_seek(pb, mkv->tags_pos, SEEK_SET);
2623 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv);
2626 avio_seek(pb, currentpos, SEEK_SET);
2629 if (!mkv->is_live) {
2630 end_ebml_master(pb, mkv->segment);
2636 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2639 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2640 if (ff_mkv_codec_tags[i].id == codec_id)
2643 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2644 enum AVMediaType type = avcodec_get_type(codec_id);
2645 // mkv theoretically supports any video/audio through VFW/ACM
2646 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2653 static int webm_query_codec(enum AVCodecID codec_id, int std_compliance)
2656 for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2657 if (ff_webm_codec_tags[i].id == codec_id)
2663 static int mkv_init(struct AVFormatContext *s)
2667 if (s->nb_streams > MAX_TRACKS) {
2668 av_log(s, AV_LOG_ERROR,
2669 "At most %d streams are supported for muxing in Matroska\n",
2671 return AVERROR(EINVAL);
2674 for (i = 0; i < s->nb_streams; i++) {
2675 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
2676 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
2677 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
2678 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
2679 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
2680 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
2681 av_log(s, AV_LOG_ERROR,
2682 "The Matroska muxer does not yet support muxing %s\n",
2683 avcodec_get_name(s->streams[i]->codecpar->codec_id));
2684 return AVERROR_PATCHWELCOME;
2688 if (s->avoid_negative_ts < 0) {
2689 s->avoid_negative_ts = 1;
2690 s->internal->avoid_negative_ts_use_pts = 1;
2693 for (i = 0; i < s->nb_streams; i++) {
2694 // ms precision is the de-facto standard timescale for mkv files
2695 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2701 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2704 AVStream *st = s->streams[pkt->stream_index];
2706 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2707 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2708 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2709 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2710 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2716 static const AVCodecTag additional_audio_tags[] = {
2717 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2718 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2719 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2720 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2721 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2722 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2723 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2724 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2725 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2726 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2727 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2728 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2729 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2732 static const AVCodecTag additional_video_tags[] = {
2733 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2734 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2735 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2736 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2739 static const AVCodecTag additional_subtitle_tags[] = {
2740 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2741 { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF },
2742 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2743 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2746 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2747 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2748 static const AVOption options[] = {
2749 { "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 },
2750 { "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 },
2751 { "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 },
2752 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2753 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2754 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2755 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2756 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2760 #if CONFIG_MATROSKA_MUXER
2761 static const AVClass matroska_class = {
2762 .class_name = "matroska muxer",
2763 .item_name = av_default_item_name,
2765 .version = LIBAVUTIL_VERSION_INT,
2768 AVOutputFormat ff_matroska_muxer = {
2770 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2771 .mime_type = "video/x-matroska",
2772 .extensions = "mkv",
2773 .priv_data_size = sizeof(MatroskaMuxContext),
2774 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2775 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2776 .video_codec = CONFIG_LIBX264_ENCODER ?
2777 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2779 .deinit = mkv_deinit,
2780 .write_header = mkv_write_header,
2781 .write_packet = mkv_write_flush_packet,
2782 .write_trailer = mkv_write_trailer,
2783 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2784 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2785 .codec_tag = (const AVCodecTag* const []){
2786 ff_codec_bmp_tags, ff_codec_wav_tags,
2787 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2789 .subtitle_codec = AV_CODEC_ID_ASS,
2790 .query_codec = mkv_query_codec,
2791 .check_bitstream = mkv_check_bitstream,
2792 .priv_class = &matroska_class,
2796 #if CONFIG_WEBM_MUXER
2797 static const AVClass webm_class = {
2798 .class_name = "webm muxer",
2799 .item_name = av_default_item_name,
2801 .version = LIBAVUTIL_VERSION_INT,
2804 AVOutputFormat ff_webm_muxer = {
2806 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2807 .mime_type = "video/webm",
2808 .extensions = "webm",
2809 .priv_data_size = sizeof(MatroskaMuxContext),
2810 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2811 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2812 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2814 .deinit = mkv_deinit,
2815 .write_header = mkv_write_header,
2816 .write_packet = mkv_write_flush_packet,
2817 .write_trailer = mkv_write_trailer,
2818 .query_codec = webm_query_codec,
2819 .check_bitstream = mkv_check_bitstream,
2820 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2821 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2822 .priv_class = &webm_class,
2826 #if CONFIG_MATROSKA_AUDIO_MUXER
2827 static const AVClass mka_class = {
2828 .class_name = "matroska audio muxer",
2829 .item_name = av_default_item_name,
2831 .version = LIBAVUTIL_VERSION_INT,
2833 AVOutputFormat ff_matroska_audio_muxer = {
2835 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2836 .mime_type = "audio/x-matroska",
2837 .extensions = "mka",
2838 .priv_data_size = sizeof(MatroskaMuxContext),
2839 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2840 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2841 .video_codec = AV_CODEC_ID_NONE,
2843 .deinit = mkv_deinit,
2844 .write_header = mkv_write_header,
2845 .write_packet = mkv_write_flush_packet,
2846 .write_trailer = mkv_write_trailer,
2847 .check_bitstream = mkv_check_bitstream,
2848 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2850 .codec_tag = (const AVCodecTag* const []){
2851 ff_codec_wav_tags, additional_audio_tags, 0
2853 .priv_class = &mka_class,