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
27 #include "avio_internal.h"
28 #include "avlanguage.h"
34 #include "subtitles.h"
35 #include "vorbiscomment.h"
38 #include "libavutil/avstring.h"
39 #include "libavutil/channel_layout.h"
40 #include "libavutil/crc.h"
41 #include "libavutil/dict.h"
42 #include "libavutil/intfloat.h"
43 #include "libavutil/intreadwrite.h"
44 #include "libavutil/lfg.h"
45 #include "libavutil/mastering_display_metadata.h"
46 #include "libavutil/mathematics.h"
47 #include "libavutil/opt.h"
48 #include "libavutil/parseutils.h"
49 #include "libavutil/random_seed.h"
50 #include "libavutil/rational.h"
51 #include "libavutil/samplefmt.h"
52 #include "libavutil/sha.h"
53 #include "libavutil/stereo3d.h"
55 #include "libavcodec/xiph.h"
56 #include "libavcodec/mpeg4audio.h"
57 #include "libavcodec/internal.h"
59 typedef struct ebml_master {
60 int64_t pos; ///< absolute offset in the file where the master's elements start
61 int sizebytes; ///< how many bytes were reserved for the size
64 typedef struct mkv_seekhead_entry {
65 unsigned int elementid;
69 typedef struct mkv_seekhead {
71 int64_t segment_offset; ///< the file offset to the beginning of the segment
72 int reserved_size; ///< -1 if appending to file
74 mkv_seekhead_entry *entries;
78 typedef struct mkv_cuepoint {
82 int64_t cluster_pos; ///< file offset of the cluster containing the block
83 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
84 int64_t duration; ///< duration of the block according to time base
87 typedef struct mkv_cues {
88 int64_t segment_offset;
89 mkv_cuepoint *entries;
93 typedef struct mkv_track {
97 int64_t sample_rate_offset;
98 int64_t codecpriv_offset;
102 typedef struct mkv_attachment {
107 typedef struct mkv_attachments {
108 mkv_attachment *entries;
112 #define MODE_MATROSKAv2 0x01
113 #define MODE_WEBM 0x02
115 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
116 * range 1 to 126 (inclusive) */
117 #define MAX_TRACKS 126
119 typedef struct MatroskaMuxContext {
120 const AVClass *class;
123 AVIOContext *tags_bc;
125 AVIOContext *info_bc;
127 AVIOContext *tracks_bc;
128 ebml_master tracks_master;
130 int64_t segment_offset;
132 int64_t cluster_pos; ///< file offset of the current cluster
134 int64_t duration_offset;
136 mkv_seekhead *main_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;
167 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
168 * offset, 4 bytes for target EBML ID */
169 #define MAX_SEEKENTRY_SIZE 21
171 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
173 #define MAX_CUETRACKPOS_SIZE 42
175 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
176 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
178 /** Seek preroll value for opus */
179 #define OPUS_SEEK_PREROLL 80000000
181 static int ebml_id_size(unsigned int id)
183 return (av_log2(id + 1) - 1) / 7 + 1;
186 static void put_ebml_id(AVIOContext *pb, unsigned int id)
188 int i = ebml_id_size(id);
190 avio_w8(pb, (uint8_t)(id >> (i * 8)));
194 * Write an EBML size meaning "unknown size".
196 * @param bytes The number of bytes the size should occupy (maximum: 8).
198 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
200 av_assert0(bytes <= 8);
201 avio_w8(pb, 0x1ff >> bytes);
202 ffio_fill(pb, 0xff, bytes - 1);
206 * Calculate how many bytes are needed to represent a given number in EBML.
208 static int ebml_num_size(uint64_t num)
211 while ((num + 1) >> bytes * 7)
217 * Write a number in EBML variable length format.
219 * @param bytes The number of bytes that need to be used to write the number.
220 * If zero, any number of bytes can be used.
222 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
224 int i, needed_bytes = ebml_num_size(num);
226 // sizes larger than this are currently undefined in EBML
227 av_assert0(num < (1ULL << 56) - 1);
230 // don't care how many bytes are used, so use the min
231 bytes = needed_bytes;
232 // the bytes needed to write the given size would exceed the bytes
233 // that we need to use, so write unknown size. This shouldn't happen.
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, unsigned int 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, unsigned int 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, unsigned int 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, unsigned int 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, unsigned int 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, unsigned int elementid,
312 uint64_t expectedsize)
314 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
315 put_ebml_id(pb, elementid);
316 put_ebml_size_unknown(pb, bytes);
317 return (ebml_master) {avio_tell(pb), bytes };
320 static void end_ebml_master(AVIOContext *pb, ebml_master master)
322 int64_t pos = avio_tell(pb);
324 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
326 put_ebml_num(pb, pos - master.pos, master.sizebytes);
327 avio_seek(pb, pos, SEEK_SET);
330 static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
331 ebml_master *master, unsigned int elementid, uint64_t expectedsize)
335 if ((ret = avio_open_dyn_buf(dyn_cp)) < 0)
338 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
339 *master = start_ebml_master(pb, elementid, expectedsize);
340 if (mkv->write_crc && mkv->mode != MODE_WEBM)
341 put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */
343 *master = start_ebml_master(*dyn_cp, elementid, expectedsize);
348 static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
351 uint8_t *buf, crc[4];
354 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
355 size = avio_close_dyn_buf(*dyn_cp, &buf);
356 if (mkv->write_crc && mkv->mode != MODE_WEBM) {
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);
362 end_ebml_master(pb, master);
364 end_ebml_master(*dyn_cp, master);
365 size = avio_close_dyn_buf(*dyn_cp, &buf);
366 avio_write(pb, buf, size);
373 * Complete ebml master whithout destroying the buffer, allowing for later updates
375 static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv,
378 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
381 int size = avio_get_dyn_buf(*dyn_cp, &buf);
383 avio_write(pb, buf, size);
384 end_ebml_master(pb, master);
388 static void put_xiph_size(AVIOContext *pb, int size)
390 ffio_fill(pb, 255, size / 255);
391 avio_w8(pb, size % 255);
395 * Free the members allocated in the mux context.
397 static void mkv_free(MatroskaMuxContext *mkv) {
400 avio_close_dyn_buf(mkv->dyn_bc, &buf);
404 avio_close_dyn_buf(mkv->info_bc, &buf);
407 if (mkv->tracks_bc) {
408 avio_close_dyn_buf(mkv->tracks_bc, &buf);
412 avio_close_dyn_buf(mkv->tags_bc, &buf);
415 if (mkv->main_seekhead) {
416 av_freep(&mkv->main_seekhead->entries);
417 av_freep(&mkv->main_seekhead);
420 av_freep(&mkv->cues->entries);
421 av_freep(&mkv->cues);
423 if (mkv->attachments) {
424 av_freep(&mkv->attachments->entries);
425 av_freep(&mkv->attachments);
427 av_freep(&mkv->tracks);
428 av_freep(&mkv->stream_durations);
429 av_freep(&mkv->stream_duration_offsets);
433 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
434 * elements. If a maximum number of elements is specified, enough space
435 * will be reserved at the current file location to write a seek head of
438 * @param segment_offset The absolute offset to the position in the file
439 * where the segment begins.
440 * @param numelements The maximum number of elements that will be indexed
441 * by this seek head, 0 if unlimited.
443 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
446 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
450 new_seekhead->segment_offset = segment_offset;
452 if (numelements > 0) {
453 new_seekhead->filepos = avio_tell(pb);
454 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
455 // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee
456 // that an EBML void element will fit afterwards
457 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19;
458 new_seekhead->max_entries = numelements;
459 put_ebml_void(pb, new_seekhead->reserved_size);
464 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
466 mkv_seekhead_entry *entries = seekhead->entries;
468 // don't store more elements than we reserved space for
469 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
472 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
474 return AVERROR(ENOMEM);
475 seekhead->entries = entries;
477 seekhead->entries[seekhead->num_entries].elementid = elementid;
478 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
484 * Write the seek head to the file and free it. If a maximum number of
485 * elements was specified to mkv_start_seekhead(), the seek head will
486 * be written at the location reserved for it. Otherwise, it is written
487 * at the current location in the file.
489 * @return The file offset where the seekhead was written,
490 * -1 if an error occurred.
492 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
495 mkv_seekhead *seekhead = mkv->main_seekhead;
496 ebml_master metaseek, seekentry;
500 currentpos = avio_tell(pb);
502 if (seekhead->reserved_size > 0) {
503 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
509 if (start_ebml_master_crc32(pb, &dyn_cp, mkv, &metaseek, MATROSKA_ID_SEEKHEAD,
510 seekhead->reserved_size) < 0) {
515 for (i = 0; i < seekhead->num_entries; i++) {
516 mkv_seekhead_entry *entry = &seekhead->entries[i];
518 seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
520 put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID);
521 put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0);
522 put_ebml_id(dyn_cp, entry->elementid);
524 put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
525 end_ebml_master(dyn_cp, seekentry);
527 end_ebml_master_crc32(pb, &dyn_cp, mkv, metaseek);
529 if (seekhead->reserved_size > 0) {
530 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
531 put_ebml_void(pb, remaining);
532 avio_seek(pb, currentpos, SEEK_SET);
534 currentpos = seekhead->filepos;
537 av_freep(&mkv->main_seekhead->entries);
538 av_freep(&mkv->main_seekhead);
543 static mkv_cues *mkv_start_cues(int64_t segment_offset)
545 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
549 cues->segment_offset = segment_offset;
553 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
554 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
556 mkv_cuepoint *entries = cues->entries;
561 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
563 return AVERROR(ENOMEM);
564 cues->entries = entries;
566 cues->entries[cues->num_entries].pts = ts;
567 cues->entries[cues->num_entries].stream_idx = stream;
568 cues->entries[cues->num_entries].tracknum = tracknum;
569 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
570 cues->entries[cues->num_entries].relative_pos = relative_pos;
571 cues->entries[cues->num_entries++].duration = duration;
576 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
578 MatroskaMuxContext *mkv = s->priv_data;
579 AVIOContext *dyn_cp, *pb = s->pb;
580 ebml_master cues_element;
584 currentpos = avio_tell(pb);
585 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &cues_element, MATROSKA_ID_CUES, 0);
589 for (i = 0; i < cues->num_entries; i++) {
590 ebml_master cuepoint, track_positions;
591 mkv_cuepoint *entry = &cues->entries[i];
592 uint64_t pts = entry->pts;
595 // Calculate the number of entries, so we know the element size
596 for (j = 0; j < num_tracks; j++)
597 tracks[j].has_cue = 0;
598 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
599 int tracknum = entry[j].stream_idx;
600 av_assert0(tracknum>=0 && tracknum<num_tracks);
601 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
603 tracks[tracknum].has_cue = 1;
607 cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
608 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts);
610 // put all the entries from different tracks that have the exact same
611 // timestamp into the same CuePoint
612 for (j = 0; j < num_tracks; j++)
613 tracks[j].has_cue = 0;
614 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
615 int tracknum = entry[j].stream_idx;
616 av_assert0(tracknum>=0 && tracknum<num_tracks);
617 if (tracks[tracknum].has_cue && s->streams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
619 tracks[tracknum].has_cue = 1;
620 track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
621 put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum );
622 put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
623 put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
624 if (entry[j].duration != -1)
625 put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration);
626 end_ebml_master(dyn_cp, track_positions);
629 end_ebml_master(dyn_cp, cuepoint);
631 end_ebml_master_crc32(pb, &dyn_cp, mkv, cues_element);
636 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
638 const uint8_t *header_start[3];
640 int first_header_size;
643 if (par->codec_id == AV_CODEC_ID_VORBIS)
644 first_header_size = 30;
646 first_header_size = 42;
648 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
649 first_header_size, header_start, header_len) < 0) {
650 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
654 avio_w8(pb, 2); // number packets - 1
655 for (j = 0; j < 2; j++) {
656 put_xiph_size(pb, header_len[j]);
658 for (j = 0; j < 3; j++)
659 avio_write(pb, header_start[j], header_len[j]);
664 static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par)
666 if (par->extradata && par->extradata_size == 2)
667 avio_write(pb, par->extradata, 2);
669 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
673 static int put_flac_codecpriv(AVFormatContext *s,
674 AVIOContext *pb, AVCodecParameters *par)
676 int write_comment = (par->channel_layout &&
677 !(par->channel_layout & ~0x3ffffULL) &&
678 !ff_flac_is_native_layout(par->channel_layout));
679 int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size,
686 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
687 "Lavf" : LIBAVFORMAT_IDENT;
688 AVDictionary *dict = NULL;
689 uint8_t buf[32], *data, *p;
692 snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout);
693 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
695 len = ff_vorbiscomment_length(dict, vendor);
696 if (len >= ((1<<24) - 4))
697 return AVERROR(EINVAL);
699 data = av_malloc(len + 4);
702 return AVERROR(ENOMEM);
706 AV_WB24(data + 1, len);
709 ff_vorbiscomment_write(&p, &dict, vendor);
711 avio_write(pb, data, len + 4);
720 static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size,
721 int *sample_rate, int *output_sample_rate)
723 MPEG4AudioConfig mp4ac;
726 ret = avpriv_mpeg4audio_get_config(&mp4ac, extradata,
727 extradata_size * 8, 1);
728 /* Don't abort if the failure is because of missing extradata. Assume in that
729 * case a bitstream filter will provide the muxer with the extradata in the
731 * Abort however if s->pb is not seekable, as we would not be able to seek back
732 * to write the sample rate elements once the extradata shows up, anyway. */
733 if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) {
734 av_log(s, AV_LOG_ERROR,
735 "Error parsing AAC extradata, unable to determine samplerate.\n");
736 return AVERROR(EINVAL);
740 /* This will only happen when this function is called while writing the
741 * header and no extradata is available. The space for this element has
742 * to be reserved for when this function is called again after the
743 * extradata shows up in the first packet, as there's no way to know if
744 * output_sample_rate will be different than sample_rate or not. */
745 *output_sample_rate = *sample_rate;
747 *sample_rate = mp4ac.sample_rate;
748 *output_sample_rate = mp4ac.ext_sample_rate;
753 static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb,
754 AVCodecParameters *par,
757 switch (par->codec_id) {
758 case AV_CODEC_ID_VORBIS:
759 case AV_CODEC_ID_THEORA:
760 return put_xiph_codecpriv(s, dyn_cp, par);
761 case AV_CODEC_ID_FLAC:
762 return put_flac_codecpriv(s, dyn_cp, par);
763 case AV_CODEC_ID_WAVPACK:
764 return put_wv_codecpriv(dyn_cp, par);
765 case AV_CODEC_ID_H264:
766 return ff_isom_write_avcc(dyn_cp, par->extradata,
767 par->extradata_size);
768 case AV_CODEC_ID_HEVC:
769 ff_isom_write_hvcc(dyn_cp, par->extradata,
770 par->extradata_size, 0);
772 case AV_CODEC_ID_ALAC:
773 if (par->extradata_size < 36) {
774 av_log(s, AV_LOG_ERROR,
775 "Invalid extradata found, ALAC expects a 36-byte "
777 return AVERROR_INVALIDDATA;
779 avio_write(dyn_cp, par->extradata + 12,
780 par->extradata_size - 12);
782 case AV_CODEC_ID_AAC:
783 if (par->extradata_size)
784 avio_write(dyn_cp, par->extradata, par->extradata_size);
786 put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4);
789 if (par->codec_id == AV_CODEC_ID_PRORES &&
790 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
791 avio_wl32(dyn_cp, par->codec_tag);
792 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
793 avio_write(dyn_cp, par->extradata, par->extradata_size);
799 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
800 AVCodecParameters *par,
801 int native_id, int qt_id)
805 int ret, codecpriv_size;
807 ret = avio_open_dyn_buf(&dyn_cp);
812 ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp);
813 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
816 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
818 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
819 && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id)
822 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
823 avio_wl32(dyn_cp, par->codec_tag);
824 for(i = 0; i < 0x5a - 8; i++)
827 avio_write(dyn_cp, par->extradata, par->extradata_size);
829 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
830 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
831 avcodec_get_name(par->codec_id));
834 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
836 if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) {
837 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
838 avcodec_get_name(par->codec_id));
839 ret = AVERROR(EINVAL);
842 ff_put_bmp_header(dyn_cp, par, 0, 0);
844 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
846 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
848 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
849 avcodec_get_name(par->codec_id));
850 ret = AVERROR(EINVAL);
853 par->codec_tag = tag;
855 ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
858 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
860 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
866 static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) {
868 uint8_t *colorinfo_ptr;
869 int side_data_size = 0;
870 int ret, colorinfo_size;
871 const uint8_t *side_data;
873 ret = avio_open_dyn_buf(&dyn_cp);
877 if (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
878 par->color_trc < AVCOL_TRC_NB) {
879 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
882 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
883 par->color_space < AVCOL_SPC_NB) {
884 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
886 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
887 par->color_primaries < AVCOL_PRI_NB) {
888 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
890 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
891 par->color_range < AVCOL_RANGE_NB) {
892 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range);
894 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED &&
895 par->chroma_location <= AVCHROMA_LOC_TOP) {
898 avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location);
899 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1);
900 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1);
903 side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
905 if (side_data_size) {
906 const AVContentLightMetadata *metadata =
907 (const AVContentLightMetadata*)side_data;
908 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL);
909 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL);
912 side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
914 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
915 ebml_master meta_element = start_ebml_master(
916 dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
917 const AVMasteringDisplayMetadata *metadata =
918 (const AVMasteringDisplayMetadata*)side_data;
919 if (metadata->has_primaries) {
920 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX,
921 av_q2d(metadata->display_primaries[0][0]));
922 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY,
923 av_q2d(metadata->display_primaries[0][1]));
924 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX,
925 av_q2d(metadata->display_primaries[1][0]));
926 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY,
927 av_q2d(metadata->display_primaries[1][1]));
928 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX,
929 av_q2d(metadata->display_primaries[2][0]));
930 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY,
931 av_q2d(metadata->display_primaries[2][1]));
932 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX,
933 av_q2d(metadata->white_point[0]));
934 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY,
935 av_q2d(metadata->white_point[1]));
937 if (metadata->has_luminance) {
938 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
939 av_q2d(metadata->max_luminance));
940 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
941 av_q2d(metadata->min_luminance));
943 end_ebml_master(dyn_cp, meta_element);
946 colorinfo_size = avio_close_dyn_buf(dyn_cp, &colorinfo_ptr);
947 if (colorinfo_size) {
948 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size);
949 avio_write(pb, colorinfo_ptr, colorinfo_size);
950 end_ebml_master(pb, colorinfo);
952 av_free(colorinfo_ptr);
956 static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb,
961 int side_data_size = 0;
962 int ret, projection_size;
963 uint8_t *projection_ptr;
966 const AVSphericalMapping *spherical =
967 (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL,
973 ret = avio_open_dyn_buf(&dyn_cp);
977 switch (spherical->projection) {
978 case AV_SPHERICAL_EQUIRECTANGULAR:
979 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
980 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
982 case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
983 ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL);
984 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
985 MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR);
986 avio_wb32(&b, 0); // version + flags
987 avio_wb32(&b, spherical->bound_top);
988 avio_wb32(&b, spherical->bound_bottom);
989 avio_wb32(&b, spherical->bound_left);
990 avio_wb32(&b, spherical->bound_right);
991 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
992 private, avio_tell(&b));
994 case AV_SPHERICAL_CUBEMAP:
995 ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL);
996 put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE,
997 MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP);
998 avio_wb32(&b, 0); // version + flags
999 avio_wb32(&b, 0); // layout
1000 avio_wb32(&b, spherical->padding);
1001 put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE,
1002 private, avio_tell(&b));
1005 av_log(s, AV_LOG_WARNING, "Unknown projection type\n");
1010 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW,
1011 (double) spherical->yaw / (1 << 16));
1012 if (spherical->pitch)
1013 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH,
1014 (double) spherical->pitch / (1 << 16));
1015 if (spherical->roll)
1016 put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL,
1017 (double) spherical->roll / (1 << 16));
1020 projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr);
1021 if (projection_size) {
1022 ebml_master projection = start_ebml_master(pb,
1023 MATROSKA_ID_VIDEOPROJECTION,
1025 avio_write(pb, projection_ptr, projection_size);
1026 end_ebml_master(pb, projection);
1028 av_freep(&projection_ptr);
1033 static void mkv_write_field_order(AVIOContext *pb, int mode,
1034 enum AVFieldOrder field_order)
1036 switch (field_order) {
1037 case AV_FIELD_UNKNOWN:
1039 case AV_FIELD_PROGRESSIVE:
1040 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1041 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
1047 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
1048 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
1049 if (mode != MODE_WEBM) {
1050 switch (field_order) {
1052 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1053 MATROSKA_VIDEO_FIELDORDER_TT);
1056 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1057 MATROSKA_VIDEO_FIELDORDER_BB);
1060 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1061 MATROSKA_VIDEO_FIELDORDER_TB);
1064 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
1065 MATROSKA_VIDEO_FIELDORDER_BT);
1072 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
1073 AVStream *st, int mode, int *h_width, int *h_height)
1077 AVDictionaryEntry *tag;
1078 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1082 // convert metadata into proper side data and add it to the stream
1083 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
1084 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
1085 int stereo_mode = atoi(tag->value);
1087 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
1088 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
1093 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
1094 stereo_mode != 10 && stereo_mode != 12) {
1095 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
1101 // iterate to find the stereo3d side data
1102 for (i = 0; i < st->nb_side_data; i++) {
1103 AVPacketSideData sd = st->side_data[i];
1104 if (sd.type == AV_PKT_DATA_STEREO3D) {
1105 AVStereo3D *stereo = (AVStereo3D *)sd.data;
1107 switch (stereo->type) {
1108 case AV_STEREO3D_2D:
1109 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
1111 case AV_STEREO3D_SIDEBYSIDE:
1112 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1113 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
1114 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
1117 case AV_STEREO3D_TOPBOTTOM:
1118 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
1119 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1123 case AV_STEREO3D_CHECKERBOARD:
1124 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
1125 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1128 case AV_STEREO3D_LINES:
1129 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
1130 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1134 case AV_STEREO3D_COLUMNS:
1135 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
1136 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1140 case AV_STEREO3D_FRAMESEQUENCE:
1141 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
1142 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
1150 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
1153 // if webm, do not write unsupported modes
1154 if ((mode == MODE_WEBM &&
1155 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
1156 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
1157 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
1158 av_log(s, AV_LOG_ERROR,
1159 "The specified stereo mode is not valid.\n");
1160 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
1161 return AVERROR(EINVAL);
1164 // write StereoMode if format is valid
1165 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
1170 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
1171 int i, AVIOContext *pb, int default_stream_exists)
1173 AVStream *st = s->streams[i];
1174 AVCodecParameters *par = st->codecpar;
1175 ebml_master subinfo, track;
1178 int bit_depth = av_get_bits_per_sample(par->codec_id);
1179 int sample_rate = par->sample_rate;
1180 int output_sample_rate = 0;
1181 int display_width_div = 1;
1182 int display_height_div = 1;
1184 AVDictionaryEntry *tag;
1186 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
1187 mkv->have_attachments = 1;
1191 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
1192 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
1193 if (par->bits_per_raw_sample)
1194 bit_depth = par->bits_per_raw_sample;
1196 bit_depth = av_get_bytes_per_sample(par->format) << 3;
1199 bit_depth = par->bits_per_coded_sample;
1202 if (par->codec_id == AV_CODEC_ID_AAC) {
1203 ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate,
1204 &output_sample_rate);
1209 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
1210 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
1211 mkv->is_dash ? mkv->dash_track_number : i + 1);
1212 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
1213 mkv->is_dash ? mkv->dash_track_number : i + 1);
1214 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
1216 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
1217 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
1218 tag = av_dict_get(st->metadata, "language", NULL, 0);
1219 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1220 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
1221 } else if (tag && tag->value) {
1222 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
1225 // The default value for TRACKFLAGDEFAULT is 1, so add element
1226 // if we need to clear it.
1227 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
1228 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
1230 if (st->disposition & AV_DISPOSITION_FORCED)
1231 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
1233 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
1234 const char *codec_id;
1235 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
1236 codec_id = "D_WEBVTT/CAPTIONS";
1237 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1238 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
1239 codec_id = "D_WEBVTT/DESCRIPTIONS";
1240 native_id = MATROSKA_TRACK_TYPE_METADATA;
1241 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1242 codec_id = "D_WEBVTT/METADATA";
1243 native_id = MATROSKA_TRACK_TYPE_METADATA;
1245 codec_id = "D_WEBVTT/SUBTITLES";
1246 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1248 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1250 // look for a codec ID string specific to mkv to use,
1251 // if none are found, use AVI codes
1252 if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) {
1253 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1254 if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) {
1255 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1261 if (mkv->allow_raw_vfw) {
1264 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1265 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1266 return AVERROR(EINVAL);
1271 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1272 int64_t codecdelay = av_rescale_q(par->initial_padding,
1273 (AVRational){ 1, 48000 },
1274 (AVRational){ 1, 1000000000 });
1275 if (codecdelay < 0) {
1276 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1277 return AVERROR(EINVAL);
1279 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1280 // (AVRational){ 1, par->sample_rate },
1283 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1285 if (par->codec_id == AV_CODEC_ID_OPUS) {
1286 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1289 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1290 par->codec_id == AV_CODEC_ID_VP9 ||
1291 par->codec_id == AV_CODEC_ID_OPUS ||
1292 par->codec_id == AV_CODEC_ID_VORBIS ||
1293 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1294 av_log(s, AV_LOG_ERROR,
1295 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1296 return AVERROR(EINVAL);
1299 switch (par->codec_type) {
1300 case AVMEDIA_TYPE_VIDEO:
1301 mkv->have_video = 1;
1302 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1304 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1305 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1306 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1308 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1311 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1312 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1313 par->codec_id == AV_CODEC_ID_SVQ1 ||
1314 par->codec_id == AV_CODEC_ID_SVQ3 ||
1315 par->codec_id == AV_CODEC_ID_CINEPAK))
1319 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1320 else if (!native_id) {
1321 // if there is no mkv-specific codec ID, use VFW mode
1322 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1323 mkv->tracks[i].write_dts = 1;
1324 s->internal->avoid_negative_ts_use_pts = 0;
1327 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1329 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1330 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1332 mkv_write_field_order(pb, mkv->mode, par->field_order);
1334 // check both side data and metadata for stereo information,
1335 // write the result to the bitstream if any is found
1336 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1338 &display_height_div);
1342 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1343 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1344 (par->format == AV_PIX_FMT_YUVA420P)) {
1345 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1348 // write DisplayWidth and DisplayHeight, they contain the size of
1349 // a single source view and/or the display aspect ratio
1350 if (st->sample_aspect_ratio.num) {
1351 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1352 if (d_width > INT_MAX) {
1353 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1354 return AVERROR(EINVAL);
1356 if (d_width != par->width || display_width_div != 1 || display_height_div != 1) {
1357 if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) {
1358 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1359 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1361 AVRational display_aspect_ratio;
1362 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1363 par->width * (int64_t)st->sample_aspect_ratio.num,
1364 par->height * (int64_t)st->sample_aspect_ratio.den,
1366 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num);
1367 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den);
1368 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR);
1371 } else if (display_width_div != 1 || display_height_div != 1) {
1372 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1373 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1374 } else if (mkv->mode != MODE_WEBM)
1375 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN);
1377 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1378 uint32_t color_space = av_le2ne32(par->codec_tag);
1379 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1381 ret = mkv_write_video_color(pb, par, st);
1384 ret = mkv_write_video_projection(s, pb, st);
1387 end_ebml_master(pb, subinfo);
1390 case AVMEDIA_TYPE_AUDIO:
1391 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1394 // no mkv-specific ID, use ACM mode
1395 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1397 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1398 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1400 mkv->tracks[i].sample_rate_offset = avio_tell(pb);
1401 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1402 if (output_sample_rate)
1403 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1405 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1406 end_ebml_master(pb, subinfo);
1409 case AVMEDIA_TYPE_SUBTITLE:
1411 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1412 return AVERROR(ENOSYS);
1415 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1416 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1418 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1421 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1422 return AVERROR(EINVAL);
1425 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1426 mkv->tracks[i].codecpriv_offset = avio_tell(pb);
1427 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1432 end_ebml_master(pb, track);
1437 static int mkv_write_tracks(AVFormatContext *s)
1439 MatroskaMuxContext *mkv = s->priv_data;
1440 AVIOContext *pb = s->pb;
1441 int i, ret, default_stream_exists = 0;
1443 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1447 ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, &mkv->tracks_master, MATROSKA_ID_TRACKS, 0);
1451 for (i = 0; i < s->nb_streams; i++) {
1452 AVStream *st = s->streams[i];
1453 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1455 for (i = 0; i < s->nb_streams; i++) {
1456 ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists);
1461 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1462 end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, mkv->tracks_master);
1464 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master);
1469 static int mkv_write_chapters(AVFormatContext *s)
1471 MatroskaMuxContext *mkv = s->priv_data;
1472 AVIOContext *dyn_cp, *pb = s->pb;
1473 ebml_master chapters, editionentry;
1474 AVRational scale = {1, 1E9};
1477 if (!s->nb_chapters || mkv->wrote_chapters)
1480 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1481 if (ret < 0) return ret;
1483 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &chapters, MATROSKA_ID_CHAPTERS, 0);
1484 if (ret < 0) return ret;
1486 editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0);
1487 if (mkv->mode != MODE_WEBM) {
1488 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1489 put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1491 for (i = 0; i < s->nb_chapters; i++) {
1492 ebml_master chapteratom, chapterdisplay;
1493 AVChapter *c = s->chapters[i];
1494 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1495 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1496 AVDictionaryEntry *t = NULL;
1497 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1498 av_log(s, AV_LOG_ERROR,
1499 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1500 chapterstart, chapterend);
1501 return AVERROR_INVALIDDATA;
1504 chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0);
1505 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1506 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1507 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1508 if (mkv->mode != MODE_WEBM) {
1509 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1510 put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1512 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1513 chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0);
1514 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value);
1515 put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und");
1516 end_ebml_master(dyn_cp, chapterdisplay);
1518 end_ebml_master(dyn_cp, chapteratom);
1520 end_ebml_master(dyn_cp, editionentry);
1521 end_ebml_master_crc32(pb, &dyn_cp, mkv, chapters);
1523 mkv->wrote_chapters = 1;
1527 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1529 uint8_t *key = av_strdup(t->key);
1531 const uint8_t *lang = NULL;
1535 return AVERROR(ENOMEM);
1537 if ((p = strrchr(p, '-')) &&
1538 (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1545 else if (*p >= 'a' && *p <= 'z')
1550 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1551 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1553 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1554 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1555 end_ebml_master(pb, tag);
1561 static int mkv_write_tag_targets(AVFormatContext *s,
1562 unsigned int elementid, unsigned int uid,
1563 ebml_master *tags, ebml_master* tag)
1566 MatroskaMuxContext *mkv = s->priv_data;
1567 ebml_master targets;
1571 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1572 if (ret < 0) return ret;
1574 start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, tags, MATROSKA_ID_TAGS, 0);
1578 *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0);
1579 targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0);
1581 put_ebml_uint(pb, elementid, uid);
1582 end_ebml_master(pb, targets);
1586 static int mkv_check_tag_name(const char *name, unsigned int elementid)
1588 return av_strcasecmp(name, "title") &&
1589 av_strcasecmp(name, "stereo_mode") &&
1590 av_strcasecmp(name, "creation_time") &&
1591 av_strcasecmp(name, "encoding_tool") &&
1592 av_strcasecmp(name, "duration") &&
1593 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1594 av_strcasecmp(name, "language")) &&
1595 (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID ||
1596 (av_strcasecmp(name, "filename") &&
1597 av_strcasecmp(name, "mimetype")));
1600 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1601 unsigned int uid, ebml_master *tags)
1603 MatroskaMuxContext *mkv = s->priv_data;
1606 AVDictionaryEntry *t = NULL;
1608 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1612 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1613 if (mkv_check_tag_name(t->key, elementid)) {
1614 ret = mkv_write_simpletag(mkv->tags_bc, t);
1620 end_ebml_master(mkv->tags_bc, tag);
1624 static int mkv_check_tag(AVDictionary *m, unsigned int elementid)
1626 AVDictionaryEntry *t = NULL;
1628 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1629 if (mkv_check_tag_name(t->key, elementid))
1635 static int mkv_write_tags(AVFormatContext *s)
1637 MatroskaMuxContext *mkv = s->priv_data;
1640 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1642 if (mkv_check_tag(s->metadata, 0)) {
1643 ret = mkv_write_tag(s, s->metadata, 0, 0, &mkv->tags);
1644 if (ret < 0) return ret;
1647 for (i = 0; i < s->nb_streams; i++) {
1648 AVStream *st = s->streams[i];
1650 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1653 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID))
1656 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags);
1657 if (ret < 0) return ret;
1660 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
1661 for (i = 0; i < s->nb_streams; i++) {
1663 AVStream *st = s->streams[i];
1664 ebml_master tag_target;
1667 if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT)
1670 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags, &tag_target);
1673 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1674 put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION");
1675 mkv->stream_duration_offsets[i] = avio_tell(pb);
1677 // Reserve space to write duration as a 20-byte string.
1678 // 2 (ebml id) + 1 (data size) + 20 (data)
1679 put_ebml_void(pb, 23);
1680 end_ebml_master(pb, tag);
1681 end_ebml_master(pb, tag_target);
1685 if (mkv->mode != MODE_WEBM) {
1686 for (i = 0; i < s->nb_chapters; i++) {
1687 AVChapter *ch = s->chapters[i];
1689 if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID))
1692 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &mkv->tags);
1698 if (mkv->have_attachments && mkv->mode != MODE_WEBM) {
1699 for (i = 0; i < mkv->attachments->num_entries; i++) {
1700 mkv_attachment *attachment = &mkv->attachments->entries[i];
1701 AVStream *st = s->streams[attachment->stream_idx];
1703 if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID))
1706 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid, &mkv->tags);
1712 if (mkv->tags.pos) {
1713 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1714 end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, mkv->tags);
1716 end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, mkv->tags);
1721 static int mkv_write_attachments(AVFormatContext *s)
1723 MatroskaMuxContext *mkv = s->priv_data;
1724 AVIOContext *dyn_cp, *pb = s->pb;
1725 ebml_master attachments;
1729 if (!mkv->have_attachments)
1732 mkv->attachments = av_mallocz(sizeof(*mkv->attachments));
1733 if (!mkv->attachments)
1734 return AVERROR(ENOMEM);
1736 av_lfg_init(&c, av_get_random_seed());
1738 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1739 if (ret < 0) return ret;
1741 ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &attachments, MATROSKA_ID_ATTACHMENTS, 0);
1742 if (ret < 0) return ret;
1744 for (i = 0; i < s->nb_streams; i++) {
1745 AVStream *st = s->streams[i];
1746 ebml_master attached_file;
1747 mkv_attachment *attachment = mkv->attachments->entries;
1748 AVDictionaryEntry *t;
1749 const char *mimetype = NULL;
1752 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1755 attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment));
1757 return AVERROR(ENOMEM);
1758 mkv->attachments->entries = attachment;
1760 attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0);
1762 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1763 put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value);
1764 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1765 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1766 return AVERROR(EINVAL);
1768 put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value);
1769 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1770 mimetype = t->value;
1771 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1773 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1774 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1775 mimetype = ff_mkv_mime_tags[i].str;
1778 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1779 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1780 mimetype = ff_mkv_image_mime_tags[i].str;
1785 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1786 "it cannot be deduced from the codec id.\n", i);
1787 return AVERROR(EINVAL);
1790 if (s->flags & AVFMT_FLAG_BITEXACT) {
1791 struct AVSHA *sha = av_sha_alloc();
1794 return AVERROR(ENOMEM);
1795 av_sha_init(sha, 160);
1796 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1797 av_sha_final(sha, digest);
1799 fileuid = AV_RL32(digest);
1801 fileuid = av_lfg_get(&c);
1803 av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n",
1804 fileuid, mkv->attachments->num_entries);
1806 put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype);
1807 put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1808 put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid);
1809 end_ebml_master(dyn_cp, attached_file);
1811 mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i;
1812 mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid;
1814 end_ebml_master_crc32(pb, &dyn_cp, mkv, attachments);
1819 static int64_t get_metadata_duration(AVFormatContext *s)
1825 AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0);
1826 if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) {
1827 av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us);
1831 for (i = 0; i < s->nb_streams; i++) {
1833 AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0);
1835 if (duration && (av_parse_time(&us, duration->value, 1) == 0))
1836 max = FFMAX(max, us);
1839 av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max);
1843 static int mkv_write_header(AVFormatContext *s)
1845 MatroskaMuxContext *mkv = s->priv_data;
1846 AVIOContext *pb = s->pb;
1847 ebml_master ebml_header;
1848 AVDictionaryEntry *tag;
1849 int ret, i, version = 2;
1850 int64_t creation_time;
1852 if (!strcmp(s->oformat->name, "webm"))
1853 mkv->mode = MODE_WEBM;
1855 mkv->mode = MODE_MATROSKAv2;
1857 if (mkv->mode != MODE_WEBM ||
1858 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1859 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1862 for (i = 0; i < s->nb_streams; i++) {
1863 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1864 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1865 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1866 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1867 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1868 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1869 av_log(s, AV_LOG_ERROR,
1870 "The Matroska muxer does not yet support muxing %s\n",
1871 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1872 return AVERROR_PATCHWELCOME;
1874 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1875 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1876 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1880 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1882 ret = AVERROR(ENOMEM);
1885 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1886 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1887 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1888 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1889 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1890 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1891 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1892 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1893 end_ebml_master(pb, ebml_header);
1895 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1896 mkv->segment_offset = avio_tell(pb);
1898 // we write 2 seek heads - one at the end of the file to point to each
1899 // cluster, and one at the beginning to point to all other level one
1900 // elements (including the seek head at the end of the file), which
1901 // isn't more than 10 elements if we only write one of each other
1902 // currently defined level 1 element
1903 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1904 if (!mkv->main_seekhead) {
1905 ret = AVERROR(ENOMEM);
1909 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1910 if (ret < 0) goto fail;
1912 ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, &mkv->info, MATROSKA_ID_INFO, 0);
1917 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1918 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1919 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1920 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1921 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1922 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1923 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1925 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1927 if (mkv->mode != MODE_WEBM) {
1928 uint32_t segment_uid[4];
1931 av_lfg_init(&lfg, av_get_random_seed());
1933 for (i = 0; i < 4; i++)
1934 segment_uid[i] = av_lfg_get(&lfg);
1936 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1939 const char *ident = "Lavf";
1940 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1941 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1944 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1945 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1946 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1947 uint8_t date_utc_buf[8];
1948 AV_WB64(date_utc_buf, date_utc);
1949 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1952 // reserve space for the duration
1954 mkv->duration_offset = avio_tell(pb);
1955 if (!mkv->is_live) {
1956 int64_t metadata_duration = get_metadata_duration(s);
1958 if (s->duration > 0) {
1959 int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE);
1960 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1961 av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration);
1962 } else if (metadata_duration > 0) {
1963 int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE);
1964 put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration);
1965 av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration);
1967 put_ebml_void(pb, 11); // assumes double-precision float to be written
1970 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
1971 end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, mkv->info);
1973 end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, mkv->info);
1976 // initialize stream_duration fields
1977 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1978 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1980 ret = mkv_write_tracks(s);
1984 for (i = 0; i < s->nb_chapters; i++)
1985 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1987 ret = mkv_write_chapters(s);
1991 if (mkv->mode != MODE_WEBM) {
1992 ret = mkv_write_attachments(s);
1997 ret = mkv_write_tags(s);
2001 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live)
2002 mkv_write_seekhead(pb, mkv);
2004 mkv->cues = mkv_start_cues(mkv->segment_offset);
2006 ret = AVERROR(ENOMEM);
2009 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
2010 mkv->cues_pos = avio_tell(pb);
2011 put_ebml_void(pb, mkv->reserve_cues_space);
2014 av_init_packet(&mkv->cur_audio_pkt);
2015 mkv->cur_audio_pkt.size = 0;
2016 mkv->cluster_pos = -1;
2020 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2021 // after 4k and on a keyframe
2022 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
2023 if (mkv->cluster_time_limit < 0)
2024 mkv->cluster_time_limit = 5000;
2025 if (mkv->cluster_size_limit < 0)
2026 mkv->cluster_size_limit = 5 * 1024 * 1024;
2028 if (mkv->cluster_time_limit < 0)
2029 mkv->cluster_time_limit = 1000;
2030 if (mkv->cluster_size_limit < 0)
2031 mkv->cluster_size_limit = 32 * 1024;
2040 static int mkv_blockgroup_size(int pkt_size)
2042 int size = pkt_size + 4;
2043 size += ebml_num_size(size);
2044 size += 2; // EBML ID for block and block duration
2045 size += 8; // max size of block duration
2046 size += ebml_num_size(size);
2047 size += 1; // blockgroup EBML ID
2051 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
2058 dst = av_malloc(srclen);
2060 return AVERROR(ENOMEM);
2062 while (srclen >= WV_HEADER_SIZE) {
2065 ret = ff_wv_parse_header(&header, src);
2068 src += WV_HEADER_SIZE;
2069 srclen -= WV_HEADER_SIZE;
2071 if (srclen < header.blocksize) {
2072 ret = AVERROR_INVALIDDATA;
2076 if (header.initial) {
2077 AV_WL32(dst + offset, header.samples);
2080 AV_WL32(dst + offset, header.flags);
2081 AV_WL32(dst + offset + 4, header.crc);
2084 if (!(header.initial && header.final)) {
2085 AV_WL32(dst + offset, header.blocksize);
2089 memcpy(dst + offset, src, header.blocksize);
2090 src += header.blocksize;
2091 srclen -= header.blocksize;
2092 offset += header.blocksize;
2104 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
2105 unsigned int blockid, AVPacket *pkt, int keyframe)
2107 MatroskaMuxContext *mkv = s->priv_data;
2108 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2109 uint8_t *data = NULL, *side_data = NULL;
2110 int offset = 0, size = pkt->size, side_data_size = 0;
2111 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2112 uint64_t additional_id = 0;
2113 int64_t discard_padding = 0;
2114 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
2115 ebml_master block_group, block_additions, block_more;
2117 ts += mkv->tracks[pkt->stream_index].ts_offset;
2119 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
2120 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
2121 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
2123 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
2124 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2125 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
2126 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
2127 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
2128 /* extradata is Annex B, assume the bitstream is too and convert it */
2129 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
2130 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
2131 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
2133 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
2139 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
2140 /* Matroska specification requires to remove the first QuickTime atom
2146 side_data = av_packet_get_side_data(pkt,
2147 AV_PKT_DATA_SKIP_SAMPLES,
2150 if (side_data && side_data_size >= 10) {
2151 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
2152 (AVRational){1, par->sample_rate},
2153 (AVRational){1, 1000000000});
2156 side_data = av_packet_get_side_data(pkt,
2157 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
2160 additional_id = AV_RB64(side_data);
2162 side_data_size -= 8;
2165 if ((side_data_size && additional_id == 1) || discard_padding) {
2166 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
2167 blockid = MATROSKA_ID_BLOCK;
2170 put_ebml_id(pb, blockid);
2171 put_ebml_num(pb, size + 4, 0);
2172 // this assumes stream_index is less than 126
2173 avio_w8(pb, 0x80 | track_number);
2174 avio_wb16(pb, ts - mkv->cluster_pts);
2175 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
2176 avio_write(pb, data + offset, size);
2177 if (data != pkt->data)
2180 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
2181 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
2182 mkv->last_track_timestamp[track_number - 1]);
2184 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
2186 if (discard_padding) {
2187 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
2190 if (side_data_size && additional_id == 1) {
2191 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
2192 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
2193 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
2194 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
2195 put_ebml_num(pb, side_data_size, 0);
2196 avio_write(pb, side_data, side_data_size);
2197 end_ebml_master(pb, block_more);
2198 end_ebml_master(pb, block_additions);
2200 if ((side_data_size && additional_id == 1) || discard_padding) {
2201 end_ebml_master(pb, block_group);
2205 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
2207 MatroskaMuxContext *mkv = s->priv_data;
2208 ebml_master blockgroup;
2209 int id_size, settings_size, size;
2210 uint8_t *id, *settings;
2211 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2212 const int flags = 0;
2215 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
2219 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
2222 size = id_size + 1 + settings_size + 1 + pkt->size;
2224 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
2225 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
2226 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
2228 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
2230 put_ebml_id(pb, MATROSKA_ID_BLOCK);
2231 put_ebml_num(pb, size + 4, 0);
2232 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
2233 avio_wb16(pb, ts - mkv->cluster_pts);
2235 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
2237 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
2238 end_ebml_master(pb, blockgroup);
2240 return pkt->duration;
2243 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
2245 MatroskaMuxContext *mkv = s->priv_data;
2247 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2248 mkv->cluster_pos = -1;
2249 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
2250 av_log(s, AV_LOG_DEBUG,
2251 "Starting new cluster at offset %" PRIu64 " bytes, "
2252 "pts %" PRIu64 "dts %" PRIu64 "\n",
2253 avio_tell(s->pb), pkt->pts, pkt->dts);
2255 av_log(s, AV_LOG_DEBUG, "Starting new cluster, "
2256 "pts %" PRIu64 "dts %" PRIu64 "\n",
2257 pkt->pts, pkt->dts);
2261 static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
2263 MatroskaMuxContext *mkv = s->priv_data;
2264 mkv_track *track = &mkv->tracks[pkt->stream_index];
2265 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2267 int side_data_size = 0, ret;
2269 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
2272 switch (par->codec_id) {
2273 case AV_CODEC_ID_AAC:
2274 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2275 int filler, output_sample_rate = 0;
2277 ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate,
2278 &output_sample_rate);
2281 if (!output_sample_rate)
2282 output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element.
2283 av_freep(&par->extradata);
2284 ret = ff_alloc_extradata(par, side_data_size);
2287 memcpy(par->extradata, side_data, side_data_size);
2288 curpos = avio_tell(mkv->tracks_bc);
2289 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2290 mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0);
2291 filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset);
2293 put_ebml_void(mkv->tracks_bc, filler);
2294 avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET);
2295 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate);
2296 put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
2297 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2298 } else if (!par->extradata_size && !track->sample_rate) {
2299 // No extradata (codecpar or packet side data).
2300 av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n");
2301 return AVERROR(EINVAL);
2304 case AV_CODEC_ID_FLAC:
2305 if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2306 AVCodecParameters *codecpriv_par;
2308 if (side_data_size != par->extradata_size) {
2309 av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n",
2311 return AVERROR(EINVAL);
2313 codecpriv_par = avcodec_parameters_alloc();
2315 return AVERROR(ENOMEM);
2316 ret = avcodec_parameters_copy(codecpriv_par, par);
2318 avcodec_parameters_free(&codecpriv_par);
2321 memcpy(codecpriv_par->extradata, side_data, side_data_size);
2322 curpos = avio_tell(mkv->tracks_bc);
2323 avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET);
2324 mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0);
2325 avio_seek(mkv->tracks_bc, curpos, SEEK_SET);
2326 avcodec_parameters_free(&codecpriv_par);
2331 av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index);
2338 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
2340 MatroskaMuxContext *mkv = s->priv_data;
2341 AVIOContext *pb = s->pb;
2342 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
2343 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2344 int duration = pkt->duration;
2346 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
2347 int64_t relative_packet_pos;
2348 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
2350 if (ts == AV_NOPTS_VALUE) {
2351 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
2352 return AVERROR(EINVAL);
2354 ts += mkv->tracks[pkt->stream_index].ts_offset;
2356 if (mkv->cluster_pos != -1) {
2357 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
2358 if ((int16_t)cluster_time != cluster_time) {
2359 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
2360 mkv_start_new_cluster(s, pkt);
2364 if (mkv->cluster_pos == -1) {
2365 mkv->cluster_pos = avio_tell(s->pb);
2366 ret = start_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, &mkv->cluster, MATROSKA_ID_CLUSTER, 0);
2369 put_ebml_uint(mkv->dyn_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
2370 mkv->cluster_pts = FFMAX(0, ts);
2374 relative_packet_pos = avio_tell(pb);
2376 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
2377 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
2378 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
2379 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
2380 if (ret < 0) return ret;
2383 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
2384 duration = mkv_write_vtt_blocks(s, pb, pkt);
2386 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
2387 mkv_blockgroup_size(pkt->size));
2389 #if FF_API_CONVERGENCE_DURATION
2390 FF_DISABLE_DEPRECATION_WARNINGS
2391 /* For backward compatibility, prefer convergence_duration. */
2392 if (pkt->convergence_duration > 0) {
2393 duration = pkt->convergence_duration;
2395 FF_ENABLE_DEPRECATION_WARNINGS
2397 /* All subtitle blocks are considered to be keyframes. */
2398 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
2399 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
2400 end_ebml_master(pb, blockgroup);
2403 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
2404 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
2405 mkv->cluster_pos, relative_packet_pos, duration);
2411 mkv->duration = FFMAX(mkv->duration, ts + duration);
2413 if (mkv->stream_durations)
2414 mkv->stream_durations[pkt->stream_index] =
2415 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
2420 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
2422 MatroskaMuxContext *mkv = s->priv_data;
2423 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
2424 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
2426 int64_t cluster_time;
2428 int start_new_cluster;
2430 ret = mkv_check_new_extra_data(s, pkt);
2434 if (mkv->tracks[pkt->stream_index].write_dts)
2435 cluster_time = pkt->dts - mkv->cluster_pts;
2437 cluster_time = pkt->pts - mkv->cluster_pts;
2438 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2440 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2441 // after 4k and on a keyframe
2442 cluster_size = avio_tell(mkv->dyn_bc);
2444 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2445 // WebM DASH specification states that the first block of every cluster
2446 // has to be a key frame. So for DASH video, we only create a cluster
2447 // on seeing key frames.
2448 start_new_cluster = keyframe;
2449 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2450 (mkv->cluster_pos == -1 ||
2451 cluster_time > mkv->cluster_time_limit)) {
2452 // For DASH audio, we create a Cluster based on cluster_time_limit
2453 start_new_cluster = 1;
2454 } else if (!mkv->is_dash &&
2455 (cluster_size > mkv->cluster_size_limit ||
2456 cluster_time > mkv->cluster_time_limit ||
2457 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2458 cluster_size > 4 * 1024))) {
2459 start_new_cluster = 1;
2461 start_new_cluster = 0;
2464 if (mkv->cluster_pos != -1 && start_new_cluster) {
2465 mkv_start_new_cluster(s, pkt);
2468 if (!mkv->cluster_pos)
2469 avio_write_marker(s->pb,
2470 av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q),
2471 keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT);
2473 // check if we have an audio packet cached
2474 if (mkv->cur_audio_pkt.size > 0) {
2475 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2476 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2477 mkv->is_dash ? start_new_cluster : 0);
2478 av_packet_unref(&mkv->cur_audio_pkt);
2480 av_log(s, AV_LOG_ERROR,
2481 "Could not write cached audio packet ret:%d\n", ret);
2486 // buffer an audio packet to ensure the packet containing the video
2487 // keyframe's timecode is contained in the same cluster for WebM
2488 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2489 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2491 ret = mkv_write_packet_internal(s, pkt, 0);
2495 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2497 MatroskaMuxContext *mkv = s->priv_data;
2500 if (mkv->cluster_pos != -1) {
2501 end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster);
2502 mkv->cluster_pos = -1;
2503 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
2504 av_log(s, AV_LOG_DEBUG,
2505 "Flushing cluster at offset %" PRIu64 " bytes\n",
2508 av_log(s, AV_LOG_DEBUG, "Flushing cluster\n");
2513 return mkv_write_packet(s, pkt);
2516 static int mkv_write_trailer(AVFormatContext *s)
2518 MatroskaMuxContext *mkv = s->priv_data;
2519 AVIOContext *pb = s->pb;
2520 int64_t currentpos, cuespos;
2523 // check if we have an audio packet cached
2524 if (mkv->cur_audio_pkt.size > 0) {
2525 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2526 av_packet_unref(&mkv->cur_audio_pkt);
2528 av_log(s, AV_LOG_ERROR,
2529 "Could not write cached audio packet ret:%d\n", ret);
2535 end_ebml_master_crc32(pb, &mkv->dyn_bc, mkv, mkv->cluster);
2538 ret = mkv_write_chapters(s);
2543 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) {
2544 if (mkv->cues->num_entries) {
2545 if (mkv->reserve_cues_space) {
2548 currentpos = avio_tell(pb);
2549 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2551 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2552 cues_end = avio_tell(pb);
2553 if (cues_end > cuespos + mkv->reserve_cues_space) {
2554 av_log(s, AV_LOG_ERROR,
2555 "Insufficient space reserved for cues: %d "
2556 "(needed: %" PRId64 ").\n",
2557 mkv->reserve_cues_space, cues_end - cuespos);
2558 return AVERROR(EINVAL);
2561 if (cues_end < cuespos + mkv->reserve_cues_space)
2562 put_ebml_void(pb, mkv->reserve_cues_space -
2563 (cues_end - cuespos));
2565 avio_seek(pb, currentpos, SEEK_SET);
2567 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2570 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2576 mkv_write_seekhead(pb, mkv);
2578 // update the duration
2579 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2580 currentpos = avio_tell(pb);
2581 avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET);
2582 put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration);
2583 avio_seek(pb, mkv->info.pos, SEEK_SET);
2584 end_ebml_master_crc32(pb, &mkv->info_bc, mkv, mkv->info);
2586 // write tracks master
2587 avio_seek(pb, mkv->tracks_master.pos, SEEK_SET);
2588 end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master);
2590 // update stream durations
2591 if (!mkv->is_live && mkv->stream_durations) {
2593 int64_t curr = avio_tell(mkv->tags_bc);
2594 for (i = 0; i < s->nb_streams; ++i) {
2595 AVStream *st = s->streams[i];
2597 if (mkv->stream_duration_offsets[i] > 0) {
2598 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2599 char duration_string[20] = "";
2601 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2602 mkv->stream_durations[i]);
2604 avio_seek(mkv->tags_bc, mkv->stream_duration_offsets[i], SEEK_SET);
2606 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2607 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2608 fmod(duration_sec, 60));
2610 put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20);
2613 avio_seek(mkv->tags_bc, curr, SEEK_SET);
2615 if (mkv->tags.pos && !mkv->is_live) {
2616 avio_seek(pb, mkv->tags.pos, SEEK_SET);
2617 end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, mkv->tags);
2620 avio_seek(pb, currentpos, SEEK_SET);
2623 if (!mkv->is_live) {
2624 end_ebml_master(pb, mkv->segment);
2631 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2634 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2635 if (ff_mkv_codec_tags[i].id == codec_id)
2638 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2639 enum AVMediaType type = avcodec_get_type(codec_id);
2640 // mkv theoretically supports any video/audio through VFW/ACM
2641 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2648 static int mkv_init(struct AVFormatContext *s)
2652 if (s->avoid_negative_ts < 0) {
2653 s->avoid_negative_ts = 1;
2654 s->internal->avoid_negative_ts_use_pts = 1;
2657 for (i = 0; i < s->nb_streams; i++) {
2658 // ms precision is the de-facto standard timescale for mkv files
2659 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2665 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2668 AVStream *st = s->streams[pkt->stream_index];
2670 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2671 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2672 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2673 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2674 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2680 static const AVCodecTag additional_audio_tags[] = {
2681 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2682 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2683 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2684 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2685 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2686 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2687 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2688 { AV_CODEC_ID_QDMC, 0xFFFFFFFF },
2689 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2690 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2691 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2692 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2693 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2694 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2697 static const AVCodecTag additional_video_tags[] = {
2698 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2699 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2700 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2701 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2702 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2703 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2706 static const AVCodecTag additional_subtitle_tags[] = {
2707 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2708 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2709 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2712 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2713 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2714 static const AVOption options[] = {
2715 { "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 },
2716 { "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 },
2717 { "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 },
2718 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2719 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2720 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2721 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2722 { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
2726 #if CONFIG_MATROSKA_MUXER
2727 static const AVClass matroska_class = {
2728 .class_name = "matroska muxer",
2729 .item_name = av_default_item_name,
2731 .version = LIBAVUTIL_VERSION_INT,
2734 AVOutputFormat ff_matroska_muxer = {
2736 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2737 .mime_type = "video/x-matroska",
2738 .extensions = "mkv",
2739 .priv_data_size = sizeof(MatroskaMuxContext),
2740 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2741 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2742 .video_codec = CONFIG_LIBX264_ENCODER ?
2743 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2745 .write_header = mkv_write_header,
2746 .write_packet = mkv_write_flush_packet,
2747 .write_trailer = mkv_write_trailer,
2748 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2749 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2750 .codec_tag = (const AVCodecTag* const []){
2751 ff_codec_bmp_tags, ff_codec_wav_tags,
2752 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2754 .subtitle_codec = AV_CODEC_ID_ASS,
2755 .query_codec = mkv_query_codec,
2756 .check_bitstream = mkv_check_bitstream,
2757 .priv_class = &matroska_class,
2761 #if CONFIG_WEBM_MUXER
2762 static const AVClass webm_class = {
2763 .class_name = "webm muxer",
2764 .item_name = av_default_item_name,
2766 .version = LIBAVUTIL_VERSION_INT,
2769 AVOutputFormat ff_webm_muxer = {
2771 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2772 .mime_type = "video/webm",
2773 .extensions = "webm",
2774 .priv_data_size = sizeof(MatroskaMuxContext),
2775 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2776 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2777 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2779 .write_header = mkv_write_header,
2780 .write_packet = mkv_write_flush_packet,
2781 .write_trailer = mkv_write_trailer,
2782 .check_bitstream = mkv_check_bitstream,
2783 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2784 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2785 .priv_class = &webm_class,
2789 #if CONFIG_MATROSKA_AUDIO_MUXER
2790 static const AVClass mka_class = {
2791 .class_name = "matroska audio muxer",
2792 .item_name = av_default_item_name,
2794 .version = LIBAVUTIL_VERSION_INT,
2796 AVOutputFormat ff_matroska_audio_muxer = {
2798 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2799 .mime_type = "audio/x-matroska",
2800 .extensions = "mka",
2801 .priv_data_size = sizeof(MatroskaMuxContext),
2802 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2803 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2804 .video_codec = AV_CODEC_ID_NONE,
2806 .write_header = mkv_write_header,
2807 .write_packet = mkv_write_flush_packet,
2808 .write_trailer = mkv_write_trailer,
2809 .check_bitstream = mkv_check_bitstream,
2810 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2812 .codec_tag = (const AVCodecTag* const []){
2813 ff_codec_wav_tags, additional_audio_tags, 0
2815 .priv_class = &mka_class,