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/dict.h"
41 #include "libavutil/intfloat.h"
42 #include "libavutil/intreadwrite.h"
43 #include "libavutil/lfg.h"
44 #include "libavutil/mastering_display_metadata.h"
45 #include "libavutil/mathematics.h"
46 #include "libavutil/opt.h"
47 #include "libavutil/random_seed.h"
48 #include "libavutil/rational.h"
49 #include "libavutil/samplefmt.h"
50 #include "libavutil/sha.h"
51 #include "libavutil/stereo3d.h"
53 #include "libavcodec/xiph.h"
54 #include "libavcodec/mpeg4audio.h"
55 #include "libavcodec/internal.h"
57 typedef struct ebml_master {
58 int64_t pos; ///< absolute offset in the file where the master's elements start
59 int sizebytes; ///< how many bytes were reserved for the size
62 typedef struct mkv_seekhead_entry {
63 unsigned int elementid;
67 typedef struct mkv_seekhead {
69 int64_t segment_offset; ///< the file offset to the beginning of the segment
70 int reserved_size; ///< -1 if appending to file
72 mkv_seekhead_entry *entries;
76 typedef struct mkv_cuepoint {
80 int64_t cluster_pos; ///< file offset of the cluster containing the block
81 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
82 int64_t duration; ///< duration of the block according to time base
85 typedef struct mkv_cues {
86 int64_t segment_offset;
87 mkv_cuepoint *entries;
91 typedef struct mkv_track {
97 #define MODE_MATROSKAv2 0x01
98 #define MODE_WEBM 0x02
100 /** Maximum number of tracks allowed in a Matroska file (with track numbers in
101 * range 1 to 126 (inclusive) */
102 #define MAX_TRACKS 126
104 typedef struct MatroskaMuxContext {
105 const AVClass *class;
109 int64_t segment_offset;
111 int64_t cluster_pos; ///< file offset of the current cluster
113 int64_t duration_offset;
115 mkv_seekhead *main_seekhead;
119 AVPacket cur_audio_pkt;
121 int have_attachments;
123 int reserve_cues_space;
124 int cluster_size_limit;
126 int64_t cluster_time_limit;
128 int dash_track_number;
131 uint32_t chapter_id_offset;
134 int64_t last_track_timestamp[MAX_TRACKS];
136 int64_t* stream_durations;
137 int64_t* stream_duration_offsets;
140 } MatroskaMuxContext;
143 /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
144 * offset, 4 bytes for target EBML ID */
145 #define MAX_SEEKENTRY_SIZE 21
147 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
149 #define MAX_CUETRACKPOS_SIZE 42
151 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
152 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
154 /** Seek preroll value for opus */
155 #define OPUS_SEEK_PREROLL 80000000
157 static int ebml_id_size(unsigned int id)
159 return (av_log2(id + 1) - 1) / 7 + 1;
162 static void put_ebml_id(AVIOContext *pb, unsigned int id)
164 int i = ebml_id_size(id);
166 avio_w8(pb, (uint8_t)(id >> (i * 8)));
170 * Write an EBML size meaning "unknown size".
172 * @param bytes The number of bytes the size should occupy (maximum: 8).
174 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
176 av_assert0(bytes <= 8);
177 avio_w8(pb, 0x1ff >> bytes);
178 ffio_fill(pb, 0xff, bytes - 1);
182 * Calculate how many bytes are needed to represent a given number in EBML.
184 static int ebml_num_size(uint64_t num)
187 while ((num + 1) >> bytes * 7)
193 * Write a number in EBML variable length format.
195 * @param bytes The number of bytes that need to be used to write the number.
196 * If zero, any number of bytes can be used.
198 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
200 int i, needed_bytes = ebml_num_size(num);
202 // sizes larger than this are currently undefined in EBML
203 av_assert0(num < (1ULL << 56) - 1);
206 // don't care how many bytes are used, so use the min
207 bytes = needed_bytes;
208 // the bytes needed to write the given size would exceed the bytes
209 // that we need to use, so write unknown size. This shouldn't happen.
210 av_assert0(bytes >= needed_bytes);
212 num |= 1ULL << bytes * 7;
213 for (i = bytes - 1; i >= 0; i--)
214 avio_w8(pb, (uint8_t)(num >> i * 8));
217 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
224 put_ebml_id(pb, elementid);
225 put_ebml_num(pb, bytes, 0);
226 for (i = bytes - 1; i >= 0; i--)
227 avio_w8(pb, (uint8_t)(val >> i * 8));
230 static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
233 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
235 while (tmp>>=8) bytes++;
237 put_ebml_id(pb, elementid);
238 put_ebml_num(pb, bytes, 0);
239 for (i = bytes - 1; i >= 0; i--)
240 avio_w8(pb, (uint8_t)(val >> i * 8));
243 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
245 put_ebml_id(pb, elementid);
246 put_ebml_num(pb, 8, 0);
247 avio_wb64(pb, av_double2int(val));
250 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
251 const void *buf, int size)
253 put_ebml_id(pb, elementid);
254 put_ebml_num(pb, size, 0);
255 avio_write(pb, buf, size);
258 static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
261 put_ebml_binary(pb, elementid, str, strlen(str));
265 * Write a void element of a given size. Useful for reserving space in
266 * the file to be written to later.
268 * @param size The number of bytes to reserve, which must be at least 2.
270 static void put_ebml_void(AVIOContext *pb, uint64_t size)
272 int64_t currentpos = avio_tell(pb);
274 av_assert0(size >= 2);
276 put_ebml_id(pb, EBML_ID_VOID);
277 // we need to subtract the length needed to store the size from the
278 // size we need to reserve so 2 cases, we use 8 bytes to store the
279 // size if possible, 1 byte otherwise
281 put_ebml_num(pb, size - 1, 0);
283 put_ebml_num(pb, size - 9, 8);
284 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
287 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
288 uint64_t expectedsize)
290 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
291 put_ebml_id(pb, elementid);
292 put_ebml_size_unknown(pb, bytes);
293 return (ebml_master) {avio_tell(pb), bytes };
296 static void end_ebml_master(AVIOContext *pb, ebml_master master)
298 int64_t pos = avio_tell(pb);
300 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
302 put_ebml_num(pb, pos - master.pos, master.sizebytes);
303 avio_seek(pb, pos, SEEK_SET);
306 static void put_xiph_size(AVIOContext *pb, int size)
308 ffio_fill(pb, 255, size / 255);
309 avio_w8(pb, size % 255);
313 * Free the members allocated in the mux context.
315 static void mkv_free(MatroskaMuxContext *mkv) {
316 if (mkv->main_seekhead) {
317 av_freep(&mkv->main_seekhead->entries);
318 av_freep(&mkv->main_seekhead);
321 av_freep(&mkv->cues->entries);
322 av_freep(&mkv->cues);
324 av_freep(&mkv->tracks);
325 av_freep(&mkv->stream_durations);
326 av_freep(&mkv->stream_duration_offsets);
330 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
331 * elements. If a maximum number of elements is specified, enough space
332 * will be reserved at the current file location to write a seek head of
335 * @param segment_offset The absolute offset to the position in the file
336 * where the segment begins.
337 * @param numelements The maximum number of elements that will be indexed
338 * by this seek head, 0 if unlimited.
340 static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
343 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
347 new_seekhead->segment_offset = segment_offset;
349 if (numelements > 0) {
350 new_seekhead->filepos = avio_tell(pb);
351 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
352 // and size, and 3 bytes to guarantee that an EBML void element
353 // will fit afterwards
354 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
355 new_seekhead->max_entries = numelements;
356 put_ebml_void(pb, new_seekhead->reserved_size);
361 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
363 mkv_seekhead_entry *entries = seekhead->entries;
365 // don't store more elements than we reserved space for
366 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
369 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
371 return AVERROR(ENOMEM);
372 seekhead->entries = entries;
374 seekhead->entries[seekhead->num_entries].elementid = elementid;
375 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
381 * Write the seek head to the file and free it. If a maximum number of
382 * elements was specified to mkv_start_seekhead(), the seek head will
383 * be written at the location reserved for it. Otherwise, it is written
384 * at the current location in the file.
386 * @return The file offset where the seekhead was written,
387 * -1 if an error occurred.
389 static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv)
391 mkv_seekhead *seekhead = mkv->main_seekhead;
392 ebml_master metaseek, seekentry;
396 currentpos = avio_tell(pb);
398 if (seekhead->reserved_size > 0) {
399 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
405 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
406 for (i = 0; i < seekhead->num_entries; i++) {
407 mkv_seekhead_entry *entry = &seekhead->entries[i];
409 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
411 put_ebml_id(pb, MATROSKA_ID_SEEKID);
412 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
413 put_ebml_id(pb, entry->elementid);
415 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
416 end_ebml_master(pb, seekentry);
418 end_ebml_master(pb, metaseek);
420 if (seekhead->reserved_size > 0) {
421 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
422 put_ebml_void(pb, remaining);
423 avio_seek(pb, currentpos, SEEK_SET);
425 currentpos = seekhead->filepos;
428 av_freep(&mkv->main_seekhead->entries);
429 av_freep(&mkv->main_seekhead);
434 static mkv_cues *mkv_start_cues(int64_t segment_offset)
436 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
440 cues->segment_offset = segment_offset;
444 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
445 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
447 mkv_cuepoint *entries = cues->entries;
452 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
454 return AVERROR(ENOMEM);
455 cues->entries = entries;
457 cues->entries[cues->num_entries].pts = ts;
458 cues->entries[cues->num_entries].stream_idx = stream;
459 cues->entries[cues->num_entries].tracknum = tracknum;
460 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
461 cues->entries[cues->num_entries].relative_pos = relative_pos;
462 cues->entries[cues->num_entries++].duration = duration;
467 static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
469 AVIOContext *pb = s->pb;
470 ebml_master cues_element;
474 currentpos = avio_tell(pb);
475 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
477 for (i = 0; i < cues->num_entries; i++) {
478 ebml_master cuepoint, track_positions;
479 mkv_cuepoint *entry = &cues->entries[i];
480 uint64_t pts = entry->pts;
483 // Calculate the number of entries, so we know the element size
484 for (j = 0; j < num_tracks; j++)
485 tracks[j].has_cue = 0;
486 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
487 int tracknum = entry[j].stream_idx;
488 av_assert0(tracknum>=0 && tracknum<num_tracks);
489 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
491 tracks[tracknum].has_cue = 1;
495 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
496 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
498 // put all the entries from different tracks that have the exact same
499 // timestamp into the same CuePoint
500 for (j = 0; j < num_tracks; j++)
501 tracks[j].has_cue = 0;
502 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
503 int tracknum = entry[j].stream_idx;
504 av_assert0(tracknum>=0 && tracknum<num_tracks);
505 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
507 tracks[tracknum].has_cue = 1;
508 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
509 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
510 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
511 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
512 if (entry[j].duration != -1)
513 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
514 end_ebml_master(pb, track_positions);
517 end_ebml_master(pb, cuepoint);
519 end_ebml_master(pb, cues_element);
524 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
526 const uint8_t *header_start[3];
528 int first_header_size;
531 if (codec->codec_id == AV_CODEC_ID_VORBIS)
532 first_header_size = 30;
534 first_header_size = 42;
536 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
537 first_header_size, header_start, header_len) < 0) {
538 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
542 avio_w8(pb, 2); // number packets - 1
543 for (j = 0; j < 2; j++) {
544 put_xiph_size(pb, header_len[j]);
546 for (j = 0; j < 3; j++)
547 avio_write(pb, header_start[j], header_len[j]);
552 static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
554 if (codec->extradata && codec->extradata_size == 2)
555 avio_write(pb, codec->extradata, 2);
557 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
561 static int put_flac_codecpriv(AVFormatContext *s,
562 AVIOContext *pb, AVCodecContext *codec)
564 int write_comment = (codec->channel_layout &&
565 !(codec->channel_layout & ~0x3ffffULL) &&
566 !ff_flac_is_native_layout(codec->channel_layout));
567 int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
574 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
575 "Lavf" : LIBAVFORMAT_IDENT;
576 AVDictionary *dict = NULL;
577 uint8_t buf[32], *data, *p;
580 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
581 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
583 len = ff_vorbiscomment_length(dict, vendor);
584 if (len >= ((1<<24) - 4))
585 return AVERROR(EINVAL);
587 data = av_malloc(len + 4);
590 return AVERROR(ENOMEM);
594 AV_WB24(data + 1, len);
597 ff_vorbiscomment_write(&p, &dict, vendor);
599 avio_write(pb, data, len + 4);
608 static int get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec,
609 int *sample_rate, int *output_sample_rate)
611 MPEG4AudioConfig mp4ac;
613 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
614 codec->extradata_size * 8, 1) < 0) {
615 av_log(s, AV_LOG_ERROR,
616 "Error parsing AAC extradata, unable to determine samplerate.\n");
617 return AVERROR(EINVAL);
620 *sample_rate = mp4ac.sample_rate;
621 *output_sample_rate = mp4ac.ext_sample_rate;
625 static int mkv_write_native_codecprivate(AVFormatContext *s,
626 AVCodecContext *codec,
629 switch (codec->codec_id) {
630 case AV_CODEC_ID_VORBIS:
631 case AV_CODEC_ID_THEORA:
632 return put_xiph_codecpriv(s, dyn_cp, codec);
633 case AV_CODEC_ID_FLAC:
634 return put_flac_codecpriv(s, dyn_cp, codec);
635 case AV_CODEC_ID_WAVPACK:
636 return put_wv_codecpriv(dyn_cp, codec);
637 case AV_CODEC_ID_H264:
638 return ff_isom_write_avcc(dyn_cp, codec->extradata,
639 codec->extradata_size);
640 case AV_CODEC_ID_HEVC:
641 ff_isom_write_hvcc(dyn_cp, codec->extradata,
642 codec->extradata_size, 0);
644 case AV_CODEC_ID_ALAC:
645 if (codec->extradata_size < 36) {
646 av_log(s, AV_LOG_ERROR,
647 "Invalid extradata found, ALAC expects a 36-byte "
649 return AVERROR_INVALIDDATA;
651 avio_write(dyn_cp, codec->extradata + 12,
652 codec->extradata_size - 12);
655 if (codec->codec_id == AV_CODEC_ID_PRORES &&
656 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
657 avio_wl32(dyn_cp, codec->codec_tag);
658 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
659 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
665 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
666 AVCodecContext *codec, int native_id,
671 int ret, codecpriv_size;
673 ret = avio_open_dyn_buf(&dyn_cp);
678 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
679 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
681 if (!codec->codec_tag)
682 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
684 if (codec->extradata_size) {
685 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
686 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
689 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
690 avio_wl32(dyn_cp, codec->codec_tag);
691 for(i = 0; i < 0x5a - 8; i++)
694 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
697 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
698 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
699 avcodec_get_name(codec->codec_id));
701 if (!codec->codec_tag)
702 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
704 if (!codec->codec_tag && codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
705 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
706 avcodec_get_name(codec->codec_id));
707 ret = AVERROR(EINVAL);
710 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
712 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
714 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
716 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
717 avcodec_get_name(codec->codec_id));
718 ret = AVERROR(EINVAL);
720 if (!codec->codec_tag)
721 codec->codec_tag = tag;
723 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
726 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
728 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
734 static int mkv_write_video_color(AVIOContext *pb, AVCodecContext *codec, AVStream *st) {
735 int side_data_size = 0;
736 const uint8_t *side_data = av_stream_get_side_data(
737 st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size);
738 ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, 0);
740 if (codec->color_trc != AVCOL_TRC_UNSPECIFIED &&
741 codec->color_trc < AVCOL_TRC_NB) {
742 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
745 if (codec->colorspace != AVCOL_SPC_UNSPECIFIED &&
746 codec->colorspace < AVCOL_SPC_NB) {
747 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, codec->colorspace);
749 if (codec->color_primaries != AVCOL_PRI_UNSPECIFIED &&
750 codec->color_primaries < AVCOL_PRI_NB) {
751 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORPRIMARIES, codec->color_primaries);
753 if (codec->color_range != AVCOL_RANGE_UNSPECIFIED &&
754 codec->color_range < AVCOL_RANGE_NB) {
755 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORRANGE, codec->color_range);
757 if (side_data_size == sizeof(AVMasteringDisplayMetadata)) {
758 ebml_master meta_element = start_ebml_master(
759 pb, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0);
760 const AVMasteringDisplayMetadata *metadata =
761 (const AVMasteringDisplayMetadata*)side_data;
762 if (metadata->has_primaries) {
763 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RX,
764 av_q2d(metadata->display_primaries[0][0]));
765 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_RY,
766 av_q2d(metadata->display_primaries[0][1]));
767 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GX,
768 av_q2d(metadata->display_primaries[1][0]));
769 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_GY,
770 av_q2d(metadata->display_primaries[1][1]));
771 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BX,
772 av_q2d(metadata->display_primaries[2][0]));
773 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_BY,
774 av_q2d(metadata->display_primaries[2][1]));
775 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEX,
776 av_q2d(metadata->white_point[0]));
777 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_WHITEY,
778 av_q2d(metadata->white_point[1]));
780 if (metadata->has_luminance) {
781 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX,
782 av_q2d(metadata->max_luminance));
783 put_ebml_float(pb, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN,
784 av_q2d(metadata->min_luminance));
786 end_ebml_master(pb, meta_element);
788 end_ebml_master(pb, colorinfo);
793 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
794 AVStream *st, int mode, int *h_width, int *h_height)
798 AVDictionaryEntry *tag;
799 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
803 // convert metadata into proper side data and add it to the stream
804 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
805 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
806 int stereo_mode = atoi(tag->value);
808 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
809 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
814 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
815 stereo_mode != 10 && stereo_mode != 12) {
816 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
822 // iterate to find the stereo3d side data
823 for (i = 0; i < st->nb_side_data; i++) {
824 AVPacketSideData sd = st->side_data[i];
825 if (sd.type == AV_PKT_DATA_STEREO3D) {
826 AVStereo3D *stereo = (AVStereo3D *)sd.data;
828 switch (stereo->type) {
830 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
832 case AV_STEREO3D_SIDEBYSIDE:
833 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
834 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
835 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
838 case AV_STEREO3D_TOPBOTTOM:
839 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
840 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
844 case AV_STEREO3D_CHECKERBOARD:
845 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
846 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
849 case AV_STEREO3D_LINES:
850 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
851 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
855 case AV_STEREO3D_COLUMNS:
856 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
857 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
861 case AV_STEREO3D_FRAMESEQUENCE:
862 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
863 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
871 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
874 // if webm, do not write unsupported modes
875 if ((mode == MODE_WEBM &&
876 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
877 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
878 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
879 av_log(s, AV_LOG_ERROR,
880 "The specified stereo mode is not valid.\n");
881 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
882 return AVERROR(EINVAL);
885 // write StereoMode if format is valid
886 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
891 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
892 int i, AVIOContext *pb, int default_stream_exists)
894 AVStream *st = s->streams[i];
895 AVCodecContext *codec = st->codec;
896 ebml_master subinfo, track;
899 int bit_depth = av_get_bits_per_sample(codec->codec_id);
900 int sample_rate = codec->sample_rate;
901 int output_sample_rate = 0;
902 int display_width_div = 1;
903 int display_height_div = 1;
905 AVDictionaryEntry *tag;
907 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
908 mkv->have_attachments = 1;
912 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726) {
913 if (codec->bits_per_raw_sample)
914 bit_depth = codec->bits_per_raw_sample;
916 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
919 bit_depth = codec->bits_per_coded_sample;
921 if (codec->codec_id == AV_CODEC_ID_AAC) {
922 ret = get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
927 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
928 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
929 mkv->is_dash ? mkv->dash_track_number : i + 1);
930 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
931 mkv->is_dash ? mkv->dash_track_number : i + 1);
932 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
934 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
935 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
936 tag = av_dict_get(st->metadata, "language", NULL, 0);
937 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
938 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
939 } else if (tag && tag->value) {
940 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
943 // The default value for TRACKFLAGDEFAULT is 1, so add element
944 // if we need to clear it.
945 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
946 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
948 if (st->disposition & AV_DISPOSITION_FORCED)
949 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
951 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
952 const char *codec_id;
953 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
954 codec_id = "D_WEBVTT/CAPTIONS";
955 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
956 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
957 codec_id = "D_WEBVTT/DESCRIPTIONS";
958 native_id = MATROSKA_TRACK_TYPE_METADATA;
959 } else if (st->disposition & AV_DISPOSITION_METADATA) {
960 codec_id = "D_WEBVTT/METADATA";
961 native_id = MATROSKA_TRACK_TYPE_METADATA;
963 codec_id = "D_WEBVTT/SUBTITLES";
964 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
966 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
968 // look for a codec ID string specific to mkv to use,
969 // if none are found, use AVI codes
970 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
971 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
972 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
977 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->codec_tag) {
978 if (mkv->allow_raw_vfw) {
981 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
982 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
983 return AVERROR(EINVAL);
988 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding && codec->codec_id == AV_CODEC_ID_OPUS) {
989 int64_t codecdelay = av_rescale_q(codec->initial_padding,
990 (AVRational){ 1, 48000 },
991 (AVRational){ 1, 1000000000 });
992 if (codecdelay < 0) {
993 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
994 return AVERROR(EINVAL);
996 // mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
997 // (AVRational){ 1, codec->sample_rate },
1000 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1002 if (codec->codec_id == AV_CODEC_ID_OPUS) {
1003 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1006 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
1007 codec->codec_id == AV_CODEC_ID_VP9 ||
1008 codec->codec_id == AV_CODEC_ID_OPUS ||
1009 codec->codec_id == AV_CODEC_ID_VORBIS ||
1010 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
1011 av_log(s, AV_LOG_ERROR,
1012 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1013 return AVERROR(EINVAL);
1016 switch (codec->codec_type) {
1017 case AVMEDIA_TYPE_VIDEO:
1018 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1020 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1021 && av_cmp_q(av_inv_q(st->avg_frame_rate), codec->time_base) > 0)
1022 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1024 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * codec->time_base.num / codec->time_base.den);
1027 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
1028 ((!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) && codec->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1029 codec->codec_id == AV_CODEC_ID_SVQ1 ||
1030 codec->codec_id == AV_CODEC_ID_SVQ3 ||
1031 codec->codec_id == AV_CODEC_ID_CINEPAK))
1035 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1036 else if (!native_id) {
1037 // if there is no mkv-specific codec ID, use VFW mode
1038 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1039 mkv->tracks[i].write_dts = 1;
1040 s->internal->avoid_negative_ts_use_pts = 0;
1043 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1044 // XXX: interlace flag?
1045 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
1046 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
1048 // check both side data and metadata for stereo information,
1049 // write the result to the bitstream if any is found
1050 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1052 &display_height_div);
1056 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1057 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1058 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
1059 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1062 // write DisplayWidth and DisplayHeight, they contain the size of
1063 // a single source view and/or the display aspect ratio
1064 if (st->sample_aspect_ratio.num) {
1065 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1066 if (d_width > INT_MAX) {
1067 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1068 return AVERROR(EINVAL);
1070 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1071 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
1072 } else if (display_width_div != 1 || display_height_div != 1) {
1073 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
1074 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
1077 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1078 uint32_t color_space = av_le2ne32(codec->codec_tag);
1079 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1081 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1082 mkv_write_video_color(pb, codec, st);
1084 end_ebml_master(pb, subinfo);
1087 case AVMEDIA_TYPE_AUDIO:
1088 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1091 // no mkv-specific ID, use ACM mode
1092 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1094 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1095 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
1096 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1097 if (output_sample_rate)
1098 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1100 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1101 end_ebml_master(pb, subinfo);
1104 case AVMEDIA_TYPE_SUBTITLE:
1106 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
1107 return AVERROR(ENOSYS);
1110 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
1111 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1113 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1116 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1117 return AVERROR(EINVAL);
1120 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1121 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1126 end_ebml_master(pb, track);
1131 static int mkv_write_tracks(AVFormatContext *s)
1133 MatroskaMuxContext *mkv = s->priv_data;
1134 AVIOContext *pb = s->pb;
1136 int i, ret, default_stream_exists = 0;
1138 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1142 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1143 for (i = 0; i < s->nb_streams; i++) {
1144 AVStream *st = s->streams[i];
1145 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1147 for (i = 0; i < s->nb_streams; i++) {
1148 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1152 end_ebml_master(pb, tracks);
1156 static int mkv_write_chapters(AVFormatContext *s)
1158 MatroskaMuxContext *mkv = s->priv_data;
1159 AVIOContext *pb = s->pb;
1160 ebml_master chapters, editionentry;
1161 AVRational scale = {1, 1E9};
1164 if (!s->nb_chapters || mkv->wrote_chapters)
1167 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1168 if (ret < 0) return ret;
1170 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1171 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1172 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1173 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1174 for (i = 0; i < s->nb_chapters; i++) {
1175 ebml_master chapteratom, chapterdisplay;
1176 AVChapter *c = s->chapters[i];
1177 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1178 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1179 AVDictionaryEntry *t = NULL;
1180 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1181 av_log(s, AV_LOG_ERROR,
1182 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1183 chapterstart, chapterend);
1184 return AVERROR_INVALIDDATA;
1187 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1188 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1189 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1190 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1191 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1192 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1193 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1194 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1195 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1196 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1197 end_ebml_master(pb, chapterdisplay);
1199 end_ebml_master(pb, chapteratom);
1201 end_ebml_master(pb, editionentry);
1202 end_ebml_master(pb, chapters);
1204 mkv->wrote_chapters = 1;
1208 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1210 uint8_t *key = av_strdup(t->key);
1212 const uint8_t *lang = NULL;
1216 return AVERROR(ENOMEM);
1218 if ((p = strrchr(p, '-')) &&
1219 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1226 else if (*p >= 'a' && *p <= 'z')
1231 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1232 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1234 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1235 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1236 end_ebml_master(pb, tag);
1242 static int mkv_write_tag_targets(AVFormatContext *s,
1243 unsigned int elementid, unsigned int uid,
1244 ebml_master *tags, ebml_master* tag)
1246 MatroskaMuxContext *mkv = s->priv_data;
1247 ebml_master targets;
1251 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1252 if (ret < 0) return ret;
1254 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1257 *tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1258 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1260 put_ebml_uint(s->pb, elementid, uid);
1261 end_ebml_master(s->pb, targets);
1265 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1266 unsigned int uid, ebml_master *tags)
1270 AVDictionaryEntry *t = NULL;
1272 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1276 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1277 if (av_strcasecmp(t->key, "title") &&
1278 av_strcasecmp(t->key, "stereo_mode") &&
1279 av_strcasecmp(t->key, "creation_time") &&
1280 av_strcasecmp(t->key, "encoding_tool") &&
1281 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1282 av_strcasecmp(t->key, "language"))) {
1283 ret = mkv_write_simpletag(s->pb, t);
1289 end_ebml_master(s->pb, tag);
1293 static int mkv_check_tag(AVDictionary *m)
1295 AVDictionaryEntry *t = NULL;
1297 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1298 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1304 static int mkv_write_tags(AVFormatContext *s)
1306 MatroskaMuxContext *mkv = s->priv_data;
1307 ebml_master tags = {0};
1310 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1312 if (mkv_check_tag(s->metadata)) {
1313 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1314 if (ret < 0) return ret;
1317 for (i = 0; i < s->nb_streams; i++) {
1318 AVStream *st = s->streams[i];
1320 if (!mkv_check_tag(st->metadata))
1323 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1324 if (ret < 0) return ret;
1327 if (!mkv->is_live) {
1328 for (i = 0; i < s->nb_streams; i++) {
1329 ebml_master tag_target;
1332 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags, &tag_target);
1334 tag = start_ebml_master(s->pb, MATROSKA_ID_SIMPLETAG, 0);
1335 put_ebml_string(s->pb, MATROSKA_ID_TAGNAME, "DURATION");
1336 mkv->stream_duration_offsets[i] = avio_tell(s->pb);
1338 // Reserve space to write duration as a 20-byte string.
1339 // 2 (ebml id) + 1 (data size) + 20 (data)
1340 put_ebml_void(s->pb, 23);
1341 end_ebml_master(s->pb, tag);
1342 end_ebml_master(s->pb, tag_target);
1346 for (i = 0; i < s->nb_chapters; i++) {
1347 AVChapter *ch = s->chapters[i];
1349 if (!mkv_check_tag(ch->metadata))
1352 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1353 if (ret < 0) return ret;
1357 end_ebml_master(s->pb, tags);
1361 static int mkv_write_attachments(AVFormatContext *s)
1363 MatroskaMuxContext *mkv = s->priv_data;
1364 AVIOContext *pb = s->pb;
1365 ebml_master attachments;
1369 if (!mkv->have_attachments)
1372 av_lfg_init(&c, av_get_random_seed());
1374 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1375 if (ret < 0) return ret;
1377 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1379 for (i = 0; i < s->nb_streams; i++) {
1380 AVStream *st = s->streams[i];
1381 ebml_master attached_file;
1382 AVDictionaryEntry *t;
1383 const char *mimetype = NULL;
1386 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1389 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1391 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1392 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1393 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1394 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1395 return AVERROR(EINVAL);
1397 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1398 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1399 mimetype = t->value;
1400 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1402 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1403 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1404 mimetype = ff_mkv_mime_tags[i].str;
1407 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1408 if (ff_mkv_image_mime_tags[i].id == st->codec->codec_id) {
1409 mimetype = ff_mkv_image_mime_tags[i].str;
1414 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1415 "it cannot be deduced from the codec id.\n", i);
1416 return AVERROR(EINVAL);
1419 if (s->flags & AVFMT_FLAG_BITEXACT) {
1420 struct AVSHA *sha = av_sha_alloc();
1423 return AVERROR(ENOMEM);
1424 av_sha_init(sha, 160);
1425 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1426 av_sha_final(sha, digest);
1428 fileuid = AV_RL64(digest);
1430 fileuid = av_lfg_get(&c);
1432 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1435 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1436 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1437 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1438 end_ebml_master(pb, attached_file);
1440 end_ebml_master(pb, attachments);
1445 static int mkv_write_header(AVFormatContext *s)
1447 MatroskaMuxContext *mkv = s->priv_data;
1448 AVIOContext *pb = s->pb;
1449 ebml_master ebml_header, segment_info;
1450 AVDictionaryEntry *tag;
1451 int ret, i, version = 2;
1452 int64_t creation_time;
1454 if (!strcmp(s->oformat->name, "webm"))
1455 mkv->mode = MODE_WEBM;
1457 mkv->mode = MODE_MATROSKAv2;
1459 if (mkv->mode != MODE_WEBM ||
1460 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1461 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1464 for (i = 0; i < s->nb_streams; i++) {
1465 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1466 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1467 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1468 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1469 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1470 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1471 av_log(s, AV_LOG_ERROR,
1472 "The Matroska muxer does not yet support muxing %s\n",
1473 avcodec_get_name(s->streams[i]->codec->codec_id));
1474 return AVERROR_PATCHWELCOME;
1476 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1477 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1478 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1482 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1484 ret = AVERROR(ENOMEM);
1487 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1488 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1489 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1490 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1491 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1492 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1493 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1494 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1495 end_ebml_master(pb, ebml_header);
1497 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1498 mkv->segment_offset = avio_tell(pb);
1500 // we write 2 seek heads - one at the end of the file to point to each
1501 // cluster, and one at the beginning to point to all other level one
1502 // elements (including the seek head at the end of the file), which
1503 // isn't more than 10 elements if we only write one of each other
1504 // currently defined level 1 element
1505 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1506 if (!mkv->main_seekhead) {
1507 ret = AVERROR(ENOMEM);
1511 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1512 if (ret < 0) goto fail;
1514 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1515 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1516 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1517 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1518 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1519 uint32_t segment_uid[4];
1522 av_lfg_init(&lfg, av_get_random_seed());
1524 for (i = 0; i < 4; i++)
1525 segment_uid[i] = av_lfg_get(&lfg);
1527 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1528 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1529 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1531 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1532 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1534 const char *ident = "Lavf";
1535 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1536 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1539 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1540 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1541 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1542 uint8_t date_utc_buf[8];
1543 AV_WB64(date_utc_buf, date_utc);
1544 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1547 // reserve space for the duration
1549 mkv->duration_offset = avio_tell(pb);
1550 if (!mkv->is_live) {
1551 put_ebml_void(pb, 11); // assumes double-precision float to be written
1553 end_ebml_master(pb, segment_info);
1555 // initialize stream_duration fields
1556 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1557 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1559 ret = mkv_write_tracks(s);
1563 for (i = 0; i < s->nb_chapters; i++)
1564 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1566 if (mkv->mode != MODE_WEBM) {
1567 ret = mkv_write_chapters(s);
1571 ret = mkv_write_tags(s);
1575 ret = mkv_write_attachments(s);
1580 if (!s->pb->seekable && !mkv->is_live)
1581 mkv_write_seekhead(pb, mkv);
1583 mkv->cues = mkv_start_cues(mkv->segment_offset);
1585 ret = AVERROR(ENOMEM);
1588 if (pb->seekable && mkv->reserve_cues_space) {
1589 mkv->cues_pos = avio_tell(pb);
1590 put_ebml_void(pb, mkv->reserve_cues_space);
1593 av_init_packet(&mkv->cur_audio_pkt);
1594 mkv->cur_audio_pkt.size = 0;
1595 mkv->cluster_pos = -1;
1599 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1600 // after 4k and on a keyframe
1602 if (mkv->cluster_time_limit < 0)
1603 mkv->cluster_time_limit = 5000;
1604 if (mkv->cluster_size_limit < 0)
1605 mkv->cluster_size_limit = 5 * 1024 * 1024;
1607 if (mkv->cluster_time_limit < 0)
1608 mkv->cluster_time_limit = 1000;
1609 if (mkv->cluster_size_limit < 0)
1610 mkv->cluster_size_limit = 32 * 1024;
1619 static int mkv_blockgroup_size(int pkt_size)
1621 int size = pkt_size + 4;
1622 size += ebml_num_size(size);
1623 size += 2; // EBML ID for block and block duration
1624 size += 8; // max size of block duration
1625 size += ebml_num_size(size);
1626 size += 1; // blockgroup EBML ID
1630 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1637 dst = av_malloc(srclen);
1639 return AVERROR(ENOMEM);
1641 while (srclen >= WV_HEADER_SIZE) {
1644 ret = ff_wv_parse_header(&header, src);
1647 src += WV_HEADER_SIZE;
1648 srclen -= WV_HEADER_SIZE;
1650 if (srclen < header.blocksize) {
1651 ret = AVERROR_INVALIDDATA;
1655 if (header.initial) {
1656 AV_WL32(dst + offset, header.samples);
1659 AV_WL32(dst + offset, header.flags);
1660 AV_WL32(dst + offset + 4, header.crc);
1663 if (!(header.initial && header.final)) {
1664 AV_WL32(dst + offset, header.blocksize);
1668 memcpy(dst + offset, src, header.blocksize);
1669 src += header.blocksize;
1670 srclen -= header.blocksize;
1671 offset += header.blocksize;
1683 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1684 unsigned int blockid, AVPacket *pkt, int keyframe)
1686 MatroskaMuxContext *mkv = s->priv_data;
1687 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1688 uint8_t *data = NULL, *side_data = NULL;
1689 int offset = 0, size = pkt->size, side_data_size = 0;
1690 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1691 uint64_t additional_id = 0;
1692 int64_t discard_padding = 0;
1693 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1694 ebml_master block_group, block_additions, block_more;
1696 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1697 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1698 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1700 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1701 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1702 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1703 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1704 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1705 /* extradata is Annex B, assume the bitstream is too and convert it */
1706 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1707 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1708 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1710 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1716 if (codec->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1717 /* Matroska specification requires to remove the first QuickTime atom
1723 side_data = av_packet_get_side_data(pkt,
1724 AV_PKT_DATA_SKIP_SAMPLES,
1727 if (side_data && side_data_size >= 10) {
1728 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1729 (AVRational){1, codec->sample_rate},
1730 (AVRational){1, 1000000000});
1733 side_data = av_packet_get_side_data(pkt,
1734 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1737 additional_id = AV_RB64(side_data);
1739 side_data_size -= 8;
1742 if ((side_data_size && additional_id == 1) || discard_padding) {
1743 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1744 blockid = MATROSKA_ID_BLOCK;
1747 put_ebml_id(pb, blockid);
1748 put_ebml_num(pb, size + 4, 0);
1749 // this assumes stream_index is less than 126
1750 avio_w8(pb, 0x80 | track_number);
1751 avio_wb16(pb, ts - mkv->cluster_pts);
1752 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
1753 avio_write(pb, data + offset, size);
1754 if (data != pkt->data)
1757 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
1758 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
1759 mkv->last_track_timestamp[track_number - 1]);
1761 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
1763 if (discard_padding) {
1764 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1767 if (side_data_size && additional_id == 1) {
1768 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1769 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1770 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1771 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1772 put_ebml_num(pb, side_data_size, 0);
1773 avio_write(pb, side_data, side_data_size);
1774 end_ebml_master(pb, block_more);
1775 end_ebml_master(pb, block_additions);
1777 if ((side_data_size && additional_id == 1) || discard_padding) {
1778 end_ebml_master(pb, block_group);
1782 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1784 MatroskaMuxContext *mkv = s->priv_data;
1785 ebml_master blockgroup;
1786 int id_size, settings_size, size;
1787 uint8_t *id, *settings;
1788 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1789 const int flags = 0;
1792 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1796 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1799 size = id_size + 1 + settings_size + 1 + pkt->size;
1801 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1802 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
1803 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1805 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1807 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1808 put_ebml_num(pb, size + 4, 0);
1809 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1810 avio_wb16(pb, ts - mkv->cluster_pts);
1812 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1814 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1815 end_ebml_master(pb, blockgroup);
1817 return pkt->duration;
1820 static void mkv_flush_dynbuf(AVFormatContext *s)
1822 MatroskaMuxContext *mkv = s->priv_data;
1829 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1830 avio_write(s->pb, dyn_buf, bufsize);
1835 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1837 MatroskaMuxContext *mkv = s->priv_data;
1840 if (s->pb->seekable) {
1846 av_log(s, AV_LOG_DEBUG,
1847 "Starting new cluster at offset %" PRIu64 " bytes, "
1848 "pts %" PRIu64 "dts %" PRIu64 "\n",
1849 avio_tell(pb), pkt->pts, pkt->dts);
1850 end_ebml_master(pb, mkv->cluster);
1851 mkv->cluster_pos = -1;
1853 mkv_flush_dynbuf(s);
1857 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1859 MatroskaMuxContext *mkv = s->priv_data;
1860 AVIOContext *pb = s->pb;
1861 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1862 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1863 int duration = pkt->duration;
1865 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1866 int64_t relative_packet_pos;
1867 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1869 if (ts == AV_NOPTS_VALUE) {
1870 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1871 return AVERROR(EINVAL);
1873 ts += mkv->tracks[pkt->stream_index].ts_offset;
1875 if (mkv->cluster_pos != -1) {
1876 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1877 if ((int16_t)cluster_time != cluster_time) {
1878 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1879 mkv_start_new_cluster(s, pkt);
1883 if (!s->pb->seekable) {
1885 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1887 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1894 if (mkv->cluster_pos == -1) {
1895 mkv->cluster_pos = avio_tell(s->pb);
1896 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1897 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1898 mkv->cluster_pts = FFMAX(0, ts);
1901 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1903 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1904 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
1905 if (s->pb->seekable && (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
1906 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1907 if (ret < 0) return ret;
1910 if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1911 duration = mkv_write_vtt_blocks(s, pb, pkt);
1913 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1914 mkv_blockgroup_size(pkt->size));
1916 #if FF_API_CONVERGENCE_DURATION
1917 FF_DISABLE_DEPRECATION_WARNINGS
1918 /* For backward compatibility, prefer convergence_duration. */
1919 if (pkt->convergence_duration > 0) {
1920 duration = pkt->convergence_duration;
1922 FF_ENABLE_DEPRECATION_WARNINGS
1924 /* All subtitle blocks are considered to be keyframes. */
1925 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
1926 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1927 end_ebml_master(pb, blockgroup);
1930 if (s->pb->seekable) {
1931 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1932 mkv->cluster_pos, relative_packet_pos, duration);
1938 mkv->duration = FFMAX(mkv->duration, ts + duration);
1940 if (mkv->stream_durations)
1941 mkv->stream_durations[pkt->stream_index] =
1942 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
1947 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1949 MatroskaMuxContext *mkv = s->priv_data;
1950 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1951 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1953 int64_t cluster_time;
1955 int start_new_cluster;
1957 if (mkv->tracks[pkt->stream_index].write_dts)
1958 cluster_time = pkt->dts - mkv->cluster_pts;
1960 cluster_time = pkt->pts - mkv->cluster_pts;
1961 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1963 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1964 // after 4k and on a keyframe
1965 if (s->pb->seekable) {
1966 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1968 cluster_size = avio_tell(mkv->dyn_bc);
1971 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1972 // WebM DASH specification states that the first block of every cluster
1973 // has to be a key frame. So for DASH video, we only create a cluster
1974 // on seeing key frames.
1975 start_new_cluster = keyframe;
1976 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1977 (mkv->cluster_pos == -1 ||
1978 cluster_time > mkv->cluster_time_limit)) {
1979 // For DASH audio, we create a Cluster based on cluster_time_limit
1980 start_new_cluster = 1;
1981 } else if (!mkv->is_dash &&
1982 (cluster_size > mkv->cluster_size_limit ||
1983 cluster_time > mkv->cluster_time_limit ||
1984 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1985 cluster_size > 4 * 1024))) {
1986 start_new_cluster = 1;
1988 start_new_cluster = 0;
1991 if (mkv->cluster_pos != -1 && start_new_cluster) {
1992 mkv_start_new_cluster(s, pkt);
1995 // check if we have an audio packet cached
1996 if (mkv->cur_audio_pkt.size > 0) {
1997 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1998 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1999 mkv->is_dash ? start_new_cluster : 0);
2000 av_packet_unref(&mkv->cur_audio_pkt);
2002 av_log(s, AV_LOG_ERROR,
2003 "Could not write cached audio packet ret:%d\n", ret);
2008 // buffer an audio packet to ensure the packet containing the video
2009 // keyframe's timecode is contained in the same cluster for WebM
2010 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2011 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2013 ret = mkv_write_packet_internal(s, pkt, 0);
2017 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2019 MatroskaMuxContext *mkv = s->priv_data;
2021 if (s->pb->seekable)
2026 if (mkv->cluster_pos != -1) {
2027 av_log(s, AV_LOG_DEBUG,
2028 "Flushing cluster at offset %" PRIu64 " bytes\n",
2030 end_ebml_master(pb, mkv->cluster);
2031 mkv->cluster_pos = -1;
2033 mkv_flush_dynbuf(s);
2038 return mkv_write_packet(s, pkt);
2041 static int mkv_write_trailer(AVFormatContext *s)
2043 MatroskaMuxContext *mkv = s->priv_data;
2044 AVIOContext *pb = s->pb;
2045 int64_t currentpos, cuespos;
2048 // check if we have an audio packet cached
2049 if (mkv->cur_audio_pkt.size > 0) {
2050 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2051 av_packet_unref(&mkv->cur_audio_pkt);
2053 av_log(s, AV_LOG_ERROR,
2054 "Could not write cached audio packet ret:%d\n", ret);
2060 end_ebml_master(mkv->dyn_bc, mkv->cluster);
2061 mkv_flush_dynbuf(s);
2062 } else if (mkv->cluster_pos != -1) {
2063 end_ebml_master(pb, mkv->cluster);
2066 if (mkv->mode != MODE_WEBM) {
2067 ret = mkv_write_chapters(s);
2073 if (mkv->cues->num_entries) {
2074 if (mkv->reserve_cues_space) {
2077 currentpos = avio_tell(pb);
2078 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2080 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2081 cues_end = avio_tell(pb);
2082 if (cues_end > cuespos + mkv->reserve_cues_space) {
2083 av_log(s, AV_LOG_ERROR,
2084 "Insufficient space reserved for cues: %d "
2085 "(needed: %" PRId64 ").\n",
2086 mkv->reserve_cues_space, cues_end - cuespos);
2087 return AVERROR(EINVAL);
2090 if (cues_end < cuespos + mkv->reserve_cues_space)
2091 put_ebml_void(pb, mkv->reserve_cues_space -
2092 (cues_end - cuespos));
2094 avio_seek(pb, currentpos, SEEK_SET);
2096 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2099 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2105 mkv_write_seekhead(pb, mkv);
2107 // update the duration
2108 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2109 currentpos = avio_tell(pb);
2110 avio_seek(pb, mkv->duration_offset, SEEK_SET);
2111 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
2113 // update stream durations
2114 if (mkv->stream_durations) {
2116 for (i = 0; i < s->nb_streams; ++i) {
2117 AVStream *st = s->streams[i];
2118 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2119 char duration_string[20] = "";
2121 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2122 mkv->stream_durations[i]);
2124 if (!mkv->is_live && mkv->stream_duration_offsets[i] > 0) {
2125 avio_seek(pb, mkv->stream_duration_offsets[i], SEEK_SET);
2127 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2128 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2129 fmod(duration_sec, 60));
2131 put_ebml_binary(pb, MATROSKA_ID_TAGSTRING, duration_string, 20);
2136 avio_seek(pb, currentpos, SEEK_SET);
2139 if (!mkv->is_live) {
2140 end_ebml_master(pb, mkv->segment);
2147 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2150 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2151 if (ff_mkv_codec_tags[i].id == codec_id)
2154 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2155 enum AVMediaType type = avcodec_get_type(codec_id);
2156 // mkv theoretically supports any video/audio through VFW/ACM
2157 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2164 static int mkv_init(struct AVFormatContext *s)
2168 if (s->avoid_negative_ts < 0) {
2169 s->avoid_negative_ts = 1;
2170 s->internal->avoid_negative_ts_use_pts = 1;
2173 for (i = 0; i < s->nb_streams; i++) {
2174 // ms precision is the de-facto standard timescale for mkv files
2175 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2181 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2184 AVStream *st = s->streams[pkt->stream_index];
2186 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
2187 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2188 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2189 } else if (st->codec->codec_id == AV_CODEC_ID_VP9) {
2190 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2196 static const AVCodecTag additional_audio_tags[] = {
2197 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2198 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2199 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2200 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2201 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2202 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2203 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2204 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2205 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2206 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2207 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2208 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2209 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2212 static const AVCodecTag additional_video_tags[] = {
2213 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2214 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2215 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2216 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2217 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2218 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2221 static const AVCodecTag additional_subtitle_tags[] = {
2222 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2223 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2224 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2227 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2228 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2229 static const AVOption options[] = {
2230 { "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 },
2231 { "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 },
2232 { "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 },
2233 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2234 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2235 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2236 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2240 #if CONFIG_MATROSKA_MUXER
2241 static const AVClass matroska_class = {
2242 .class_name = "matroska muxer",
2243 .item_name = av_default_item_name,
2245 .version = LIBAVUTIL_VERSION_INT,
2248 AVOutputFormat ff_matroska_muxer = {
2250 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2251 .mime_type = "video/x-matroska",
2252 .extensions = "mkv",
2253 .priv_data_size = sizeof(MatroskaMuxContext),
2254 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2255 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2256 .video_codec = CONFIG_LIBX264_ENCODER ?
2257 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2259 .write_header = mkv_write_header,
2260 .write_packet = mkv_write_flush_packet,
2261 .write_trailer = mkv_write_trailer,
2262 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2263 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2264 .codec_tag = (const AVCodecTag* const []){
2265 ff_codec_bmp_tags, ff_codec_wav_tags,
2266 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2268 .subtitle_codec = AV_CODEC_ID_ASS,
2269 .query_codec = mkv_query_codec,
2270 .check_bitstream = mkv_check_bitstream,
2271 .priv_class = &matroska_class,
2275 #if CONFIG_WEBM_MUXER
2276 static const AVClass webm_class = {
2277 .class_name = "webm muxer",
2278 .item_name = av_default_item_name,
2280 .version = LIBAVUTIL_VERSION_INT,
2283 AVOutputFormat ff_webm_muxer = {
2285 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2286 .mime_type = "video/webm",
2287 .extensions = "webm",
2288 .priv_data_size = sizeof(MatroskaMuxContext),
2289 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2290 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2291 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2293 .write_header = mkv_write_header,
2294 .write_packet = mkv_write_flush_packet,
2295 .write_trailer = mkv_write_trailer,
2296 .check_bitstream = mkv_check_bitstream,
2297 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2298 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2299 .priv_class = &webm_class,
2303 #if CONFIG_MATROSKA_AUDIO_MUXER
2304 static const AVClass mka_class = {
2305 .class_name = "matroska audio muxer",
2306 .item_name = av_default_item_name,
2308 .version = LIBAVUTIL_VERSION_INT,
2310 AVOutputFormat ff_matroska_audio_muxer = {
2312 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2313 .mime_type = "audio/x-matroska",
2314 .extensions = "mka",
2315 .priv_data_size = sizeof(MatroskaMuxContext),
2316 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2317 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2318 .video_codec = AV_CODEC_ID_NONE,
2320 .write_header = mkv_write_header,
2321 .write_packet = mkv_write_flush_packet,
2322 .write_trailer = mkv_write_trailer,
2323 .check_bitstream = mkv_check_bitstream,
2324 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2326 .codec_tag = (const AVCodecTag* const []){
2327 ff_codec_wav_tags, additional_audio_tags, 0
2329 .priv_class = &mka_class,