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]->codecpar->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]->codecpar->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, AVCodecParameters *par)
526 const uint8_t *header_start[3];
528 int first_header_size;
531 if (par->codec_id == AV_CODEC_ID_VORBIS)
532 first_header_size = 30;
534 first_header_size = 42;
536 if (avpriv_split_xiph_headers(par->extradata, par->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, AVCodecParameters *par)
554 if (par->extradata && par->extradata_size == 2)
555 avio_write(pb, par->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, AVCodecParameters *par)
564 int write_comment = (par->channel_layout &&
565 !(par->channel_layout & ~0x3ffffULL) &&
566 !ff_flac_is_native_layout(par->channel_layout));
567 int ret = ff_flac_write_header(pb, par->extradata, par->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, par->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, AVCodecParameters *par,
609 int *sample_rate, int *output_sample_rate)
611 MPEG4AudioConfig mp4ac;
613 if (avpriv_mpeg4audio_get_config(&mp4ac, par->extradata,
614 par->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 AVCodecParameters *par,
629 switch (par->codec_id) {
630 case AV_CODEC_ID_VORBIS:
631 case AV_CODEC_ID_THEORA:
632 return put_xiph_codecpriv(s, dyn_cp, par);
633 case AV_CODEC_ID_FLAC:
634 return put_flac_codecpriv(s, dyn_cp, par);
635 case AV_CODEC_ID_WAVPACK:
636 return put_wv_codecpriv(dyn_cp, par);
637 case AV_CODEC_ID_H264:
638 return ff_isom_write_avcc(dyn_cp, par->extradata,
639 par->extradata_size);
640 case AV_CODEC_ID_HEVC:
641 ff_isom_write_hvcc(dyn_cp, par->extradata,
642 par->extradata_size, 0);
644 case AV_CODEC_ID_ALAC:
645 if (par->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, par->extradata + 12,
652 par->extradata_size - 12);
655 if (par->codec_id == AV_CODEC_ID_PRORES &&
656 ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) {
657 avio_wl32(dyn_cp, par->codec_tag);
658 } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA)
659 avio_write(dyn_cp, par->extradata, par->extradata_size);
665 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
666 AVCodecParameters *par,
667 int native_id, int qt_id)
671 int ret, codecpriv_size;
673 ret = avio_open_dyn_buf(&dyn_cp);
678 ret = mkv_write_native_codecprivate(s, par, dyn_cp);
679 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
682 par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
684 if (par->extradata_size) {
685 if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id
686 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id
689 avio_wb32(dyn_cp, 0x5a + par->extradata_size);
690 avio_wl32(dyn_cp, par->codec_tag);
691 for(i = 0; i < 0x5a - 8; i++)
694 avio_write(dyn_cp, par->extradata, par->extradata_size);
697 if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id))
698 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
699 avcodec_get_name(par->codec_id));
702 par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
704 if (!par->codec_tag && par->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(par->codec_id));
707 ret = AVERROR(EINVAL);
710 ff_put_bmp_header(dyn_cp, par, ff_codec_bmp_tags, 0, 0);
712 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
714 tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id);
716 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
717 avcodec_get_name(par->codec_id));
718 ret = AVERROR(EINVAL);
721 par->codec_tag = tag;
723 ff_put_wav_header(s, dyn_cp, par, 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, AVCodecParameters *par, 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 (par->color_trc != AVCOL_TRC_UNSPECIFIED &&
741 par->color_trc < AVCOL_TRC_NB) {
742 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS,
745 if (par->color_space != AVCOL_SPC_UNSPECIFIED &&
746 par->color_space < AVCOL_SPC_NB) {
747 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space);
749 if (par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
750 par->color_primaries < AVCOL_PRI_NB) {
751 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries);
753 if (par->color_range != AVCOL_RANGE_UNSPECIFIED &&
754 par->color_range < AVCOL_RANGE_NB) {
755 put_ebml_uint(pb, MATROSKA_ID_VIDEOCOLORRANGE, par->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);
792 static void mkv_write_field_order(AVIOContext *pb,
793 enum AVFieldOrder field_order)
795 switch (field_order) {
796 case AV_FIELD_UNKNOWN:
797 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
798 MATROSKA_VIDEO_INTERLACE_FLAG_UNDETERMINED);
800 case AV_FIELD_PROGRESSIVE:
801 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
802 MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE);
808 put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED,
809 MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED);
810 switch (field_order) {
812 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
813 MATROSKA_VIDEO_FIELDORDER_TT);
816 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
817 MATROSKA_VIDEO_FIELDORDER_BB);
820 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
821 MATROSKA_VIDEO_FIELDORDER_TB);
824 put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER,
825 MATROSKA_VIDEO_FIELDORDER_BT);
831 static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
832 AVStream *st, int mode, int *h_width, int *h_height)
836 AVDictionaryEntry *tag;
837 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
841 // convert metadata into proper side data and add it to the stream
842 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
843 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
844 int stereo_mode = atoi(tag->value);
846 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
847 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
852 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
853 stereo_mode != 10 && stereo_mode != 12) {
854 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
860 // iterate to find the stereo3d side data
861 for (i = 0; i < st->nb_side_data; i++) {
862 AVPacketSideData sd = st->side_data[i];
863 if (sd.type == AV_PKT_DATA_STEREO3D) {
864 AVStereo3D *stereo = (AVStereo3D *)sd.data;
866 switch (stereo->type) {
868 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
870 case AV_STEREO3D_SIDEBYSIDE:
871 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
872 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
873 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
876 case AV_STEREO3D_TOPBOTTOM:
877 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
878 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
882 case AV_STEREO3D_CHECKERBOARD:
883 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
884 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
887 case AV_STEREO3D_LINES:
888 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
889 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
893 case AV_STEREO3D_COLUMNS:
894 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
895 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
899 case AV_STEREO3D_FRAMESEQUENCE:
900 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
901 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
909 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
912 // if webm, do not write unsupported modes
913 if ((mode == MODE_WEBM &&
914 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
915 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
916 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
917 av_log(s, AV_LOG_ERROR,
918 "The specified stereo mode is not valid.\n");
919 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
920 return AVERROR(EINVAL);
923 // write StereoMode if format is valid
924 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
929 static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
930 int i, AVIOContext *pb, int default_stream_exists)
932 AVStream *st = s->streams[i];
933 AVCodecParameters *par = st->codecpar;
934 ebml_master subinfo, track;
937 int bit_depth = av_get_bits_per_sample(par->codec_id);
938 int sample_rate = par->sample_rate;
939 int output_sample_rate = 0;
940 int display_width_div = 1;
941 int display_height_div = 1;
943 AVDictionaryEntry *tag;
945 if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
946 mkv->have_attachments = 1;
950 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
951 if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) {
952 if (par->bits_per_raw_sample)
953 bit_depth = par->bits_per_raw_sample;
955 bit_depth = av_get_bytes_per_sample(par->format) << 3;
958 bit_depth = par->bits_per_coded_sample;
961 if (par->codec_id == AV_CODEC_ID_AAC) {
962 ret = get_aac_sample_rates(s, par, &sample_rate, &output_sample_rate);
967 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
968 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
969 mkv->is_dash ? mkv->dash_track_number : i + 1);
970 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
971 mkv->is_dash ? mkv->dash_track_number : i + 1);
972 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
974 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
975 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
976 tag = av_dict_get(st->metadata, "language", NULL, 0);
977 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
978 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
979 } else if (tag && tag->value) {
980 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
983 // The default value for TRACKFLAGDEFAULT is 1, so add element
984 // if we need to clear it.
985 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
986 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
988 if (st->disposition & AV_DISPOSITION_FORCED)
989 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
991 if (mkv->mode == MODE_WEBM && par->codec_id == AV_CODEC_ID_WEBVTT) {
992 const char *codec_id;
993 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
994 codec_id = "D_WEBVTT/CAPTIONS";
995 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
996 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
997 codec_id = "D_WEBVTT/DESCRIPTIONS";
998 native_id = MATROSKA_TRACK_TYPE_METADATA;
999 } else if (st->disposition & AV_DISPOSITION_METADATA) {
1000 codec_id = "D_WEBVTT/METADATA";
1001 native_id = MATROSKA_TRACK_TYPE_METADATA;
1003 codec_id = "D_WEBVTT/SUBTITLES";
1004 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1006 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
1008 // look for a codec ID string specific to mkv to use,
1009 // if none are found, use AVI codes
1010 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
1011 if (ff_mkv_codec_tags[j].id == par->codec_id) {
1012 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
1017 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->codec_tag) {
1018 if (mkv->allow_raw_vfw) {
1021 av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n"
1022 "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n");
1023 return AVERROR(EINVAL);
1028 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) {
1029 int64_t codecdelay = av_rescale_q(par->initial_padding,
1030 (AVRational){ 1, 48000 },
1031 (AVRational){ 1, 1000000000 });
1032 if (codecdelay < 0) {
1033 av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n");
1034 return AVERROR(EINVAL);
1036 // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding,
1037 // (AVRational){ 1, par->sample_rate },
1040 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay);
1042 if (par->codec_id == AV_CODEC_ID_OPUS) {
1043 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
1046 if (mkv->mode == MODE_WEBM && !(par->codec_id == AV_CODEC_ID_VP8 ||
1047 par->codec_id == AV_CODEC_ID_VP9 ||
1048 par->codec_id == AV_CODEC_ID_OPUS ||
1049 par->codec_id == AV_CODEC_ID_VORBIS ||
1050 par->codec_id == AV_CODEC_ID_WEBVTT)) {
1051 av_log(s, AV_LOG_ERROR,
1052 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
1053 return AVERROR(EINVAL);
1056 switch (par->codec_type) {
1057 case AVMEDIA_TYPE_VIDEO:
1058 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
1060 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
1061 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0)
1062 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num);
1064 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->time_base.num / st->time_base.den);
1067 ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) &&
1068 ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) ||
1069 par->codec_id == AV_CODEC_ID_SVQ1 ||
1070 par->codec_id == AV_CODEC_ID_SVQ3 ||
1071 par->codec_id == AV_CODEC_ID_CINEPAK))
1075 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
1076 else if (!native_id) {
1077 // if there is no mkv-specific codec ID, use VFW mode
1078 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
1079 mkv->tracks[i].write_dts = 1;
1080 s->internal->avoid_negative_ts_use_pts = 0;
1083 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
1085 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width);
1086 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height);
1088 if (mkv->mode != MODE_WEBM)
1089 mkv_write_field_order(pb, par->field_order);
1091 // check both side data and metadata for stereo information,
1092 // write the result to the bitstream if any is found
1093 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
1095 &display_height_div);
1099 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1100 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
1101 (par->format == AV_PIX_FMT_YUVA420P)) {
1102 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
1105 // write DisplayWidth and DisplayHeight, they contain the size of
1106 // a single source view and/or the display aspect ratio
1107 if (st->sample_aspect_ratio.num) {
1108 int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
1109 if (d_width > INT_MAX) {
1110 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
1111 return AVERROR(EINVAL);
1113 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
1114 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1115 } else if (display_width_div != 1 || display_height_div != 1) {
1116 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div);
1117 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div);
1120 if (par->codec_id == AV_CODEC_ID_RAWVIDEO) {
1121 uint32_t color_space = av_le2ne32(par->codec_tag);
1122 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
1124 if (s->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
1125 mkv_write_video_color(pb, par, st);
1127 end_ebml_master(pb, subinfo);
1130 case AVMEDIA_TYPE_AUDIO:
1131 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
1134 // no mkv-specific ID, use ACM mode
1135 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
1137 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
1138 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels);
1139 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
1140 if (output_sample_rate)
1141 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
1143 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
1144 end_ebml_master(pb, subinfo);
1147 case AVMEDIA_TYPE_SUBTITLE:
1149 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id);
1150 return AVERROR(ENOSYS);
1153 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT)
1154 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
1156 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
1159 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1160 return AVERROR(EINVAL);
1163 if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) {
1164 ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id);
1169 end_ebml_master(pb, track);
1174 static int mkv_write_tracks(AVFormatContext *s)
1176 MatroskaMuxContext *mkv = s->priv_data;
1177 AVIOContext *pb = s->pb;
1179 int i, ret, default_stream_exists = 0;
1181 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1185 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1186 for (i = 0; i < s->nb_streams; i++) {
1187 AVStream *st = s->streams[i];
1188 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1190 for (i = 0; i < s->nb_streams; i++) {
1191 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1195 end_ebml_master(pb, tracks);
1199 static int mkv_write_chapters(AVFormatContext *s)
1201 MatroskaMuxContext *mkv = s->priv_data;
1202 AVIOContext *pb = s->pb;
1203 ebml_master chapters, editionentry;
1204 AVRational scale = {1, 1E9};
1207 if (!s->nb_chapters || mkv->wrote_chapters)
1210 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1211 if (ret < 0) return ret;
1213 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1214 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1215 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1216 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1217 for (i = 0; i < s->nb_chapters; i++) {
1218 ebml_master chapteratom, chapterdisplay;
1219 AVChapter *c = s->chapters[i];
1220 int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale);
1221 int64_t chapterend = av_rescale_q(c->end, c->time_base, scale);
1222 AVDictionaryEntry *t = NULL;
1223 if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) {
1224 av_log(s, AV_LOG_ERROR,
1225 "Invalid chapter start (%"PRId64") or end (%"PRId64").\n",
1226 chapterstart, chapterend);
1227 return AVERROR_INVALIDDATA;
1230 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1231 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1232 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, chapterstart);
1233 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, chapterend);
1234 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1235 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1236 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1237 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1238 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1239 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1240 end_ebml_master(pb, chapterdisplay);
1242 end_ebml_master(pb, chapteratom);
1244 end_ebml_master(pb, editionentry);
1245 end_ebml_master(pb, chapters);
1247 mkv->wrote_chapters = 1;
1251 static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1253 uint8_t *key = av_strdup(t->key);
1255 const uint8_t *lang = NULL;
1259 return AVERROR(ENOMEM);
1261 if ((p = strrchr(p, '-')) &&
1262 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1269 else if (*p >= 'a' && *p <= 'z')
1274 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1275 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1277 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1278 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1279 end_ebml_master(pb, tag);
1285 static int mkv_write_tag_targets(AVFormatContext *s,
1286 unsigned int elementid, unsigned int uid,
1287 ebml_master *tags, ebml_master* tag)
1289 MatroskaMuxContext *mkv = s->priv_data;
1290 ebml_master targets;
1294 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1295 if (ret < 0) return ret;
1297 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1300 *tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1301 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1303 put_ebml_uint(s->pb, elementid, uid);
1304 end_ebml_master(s->pb, targets);
1308 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1309 unsigned int uid, ebml_master *tags)
1313 AVDictionaryEntry *t = NULL;
1315 ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag);
1319 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
1320 if (av_strcasecmp(t->key, "title") &&
1321 av_strcasecmp(t->key, "stereo_mode") &&
1322 av_strcasecmp(t->key, "creation_time") &&
1323 av_strcasecmp(t->key, "encoding_tool") &&
1324 (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID ||
1325 av_strcasecmp(t->key, "language"))) {
1326 ret = mkv_write_simpletag(s->pb, t);
1332 end_ebml_master(s->pb, tag);
1336 static int mkv_check_tag(AVDictionary *m)
1338 AVDictionaryEntry *t = NULL;
1340 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1341 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1347 static int mkv_write_tags(AVFormatContext *s)
1349 MatroskaMuxContext *mkv = s->priv_data;
1350 ebml_master tags = {0};
1353 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1355 if (mkv_check_tag(s->metadata)) {
1356 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1357 if (ret < 0) return ret;
1360 for (i = 0; i < s->nb_streams; i++) {
1361 AVStream *st = s->streams[i];
1363 if (!mkv_check_tag(st->metadata))
1366 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1367 if (ret < 0) return ret;
1370 if (!mkv->is_live) {
1371 for (i = 0; i < s->nb_streams; i++) {
1372 ebml_master tag_target;
1375 mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags, &tag_target);
1377 tag = start_ebml_master(s->pb, MATROSKA_ID_SIMPLETAG, 0);
1378 put_ebml_string(s->pb, MATROSKA_ID_TAGNAME, "DURATION");
1379 mkv->stream_duration_offsets[i] = avio_tell(s->pb);
1381 // Reserve space to write duration as a 20-byte string.
1382 // 2 (ebml id) + 1 (data size) + 20 (data)
1383 put_ebml_void(s->pb, 23);
1384 end_ebml_master(s->pb, tag);
1385 end_ebml_master(s->pb, tag_target);
1389 for (i = 0; i < s->nb_chapters; i++) {
1390 AVChapter *ch = s->chapters[i];
1392 if (!mkv_check_tag(ch->metadata))
1395 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1396 if (ret < 0) return ret;
1400 end_ebml_master(s->pb, tags);
1404 static int mkv_write_attachments(AVFormatContext *s)
1406 MatroskaMuxContext *mkv = s->priv_data;
1407 AVIOContext *pb = s->pb;
1408 ebml_master attachments;
1412 if (!mkv->have_attachments)
1415 av_lfg_init(&c, av_get_random_seed());
1417 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1418 if (ret < 0) return ret;
1420 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1422 for (i = 0; i < s->nb_streams; i++) {
1423 AVStream *st = s->streams[i];
1424 ebml_master attached_file;
1425 AVDictionaryEntry *t;
1426 const char *mimetype = NULL;
1429 if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1432 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1434 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1435 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1436 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1437 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1438 return AVERROR(EINVAL);
1440 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1441 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1442 mimetype = t->value;
1443 else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) {
1445 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1446 if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) {
1447 mimetype = ff_mkv_mime_tags[i].str;
1450 for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1451 if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) {
1452 mimetype = ff_mkv_image_mime_tags[i].str;
1457 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1458 "it cannot be deduced from the codec id.\n", i);
1459 return AVERROR(EINVAL);
1462 if (s->flags & AVFMT_FLAG_BITEXACT) {
1463 struct AVSHA *sha = av_sha_alloc();
1466 return AVERROR(ENOMEM);
1467 av_sha_init(sha, 160);
1468 av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size);
1469 av_sha_final(sha, digest);
1471 fileuid = AV_RL64(digest);
1473 fileuid = av_lfg_get(&c);
1475 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1478 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1479 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size);
1480 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1481 end_ebml_master(pb, attached_file);
1483 end_ebml_master(pb, attachments);
1488 static int mkv_write_header(AVFormatContext *s)
1490 MatroskaMuxContext *mkv = s->priv_data;
1491 AVIOContext *pb = s->pb;
1492 ebml_master ebml_header, segment_info;
1493 AVDictionaryEntry *tag;
1494 int ret, i, version = 2;
1495 int64_t creation_time;
1497 if (!strcmp(s->oformat->name, "webm"))
1498 mkv->mode = MODE_WEBM;
1500 mkv->mode = MODE_MATROSKAv2;
1502 if (mkv->mode != MODE_WEBM ||
1503 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1504 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1507 for (i = 0; i < s->nb_streams; i++) {
1508 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 ||
1509 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK ||
1510 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 ||
1511 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR ||
1512 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 ||
1513 s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) {
1514 av_log(s, AV_LOG_ERROR,
1515 "The Matroska muxer does not yet support muxing %s\n",
1516 avcodec_get_name(s->streams[i]->codecpar->codec_id));
1517 return AVERROR_PATCHWELCOME;
1519 if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS ||
1520 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1521 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1525 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1527 ret = AVERROR(ENOMEM);
1530 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1531 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1532 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1533 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1534 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1535 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1536 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1537 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1538 end_ebml_master(pb, ebml_header);
1540 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1541 mkv->segment_offset = avio_tell(pb);
1543 // we write 2 seek heads - one at the end of the file to point to each
1544 // cluster, and one at the beginning to point to all other level one
1545 // elements (including the seek head at the end of the file), which
1546 // isn't more than 10 elements if we only write one of each other
1547 // currently defined level 1 element
1548 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1549 if (!mkv->main_seekhead) {
1550 ret = AVERROR(ENOMEM);
1554 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1555 if (ret < 0) goto fail;
1557 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1558 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1559 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1560 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1561 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1562 uint32_t segment_uid[4];
1565 av_lfg_init(&lfg, av_get_random_seed());
1567 for (i = 0; i < 4; i++)
1568 segment_uid[i] = av_lfg_get(&lfg);
1570 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1571 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1572 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1574 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1575 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1577 const char *ident = "Lavf";
1578 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1579 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1582 if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) {
1583 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1584 int64_t date_utc = (creation_time - 978307200000000LL) * 1000;
1585 uint8_t date_utc_buf[8];
1586 AV_WB64(date_utc_buf, date_utc);
1587 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1590 // reserve space for the duration
1592 mkv->duration_offset = avio_tell(pb);
1593 if (!mkv->is_live) {
1594 put_ebml_void(pb, 11); // assumes double-precision float to be written
1596 end_ebml_master(pb, segment_info);
1598 // initialize stream_duration fields
1599 mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t));
1600 mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t));
1602 ret = mkv_write_tracks(s);
1606 for (i = 0; i < s->nb_chapters; i++)
1607 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1609 if (mkv->mode != MODE_WEBM) {
1610 ret = mkv_write_chapters(s);
1614 ret = mkv_write_tags(s);
1618 ret = mkv_write_attachments(s);
1623 if (!s->pb->seekable && !mkv->is_live)
1624 mkv_write_seekhead(pb, mkv);
1626 mkv->cues = mkv_start_cues(mkv->segment_offset);
1628 ret = AVERROR(ENOMEM);
1631 if (pb->seekable && mkv->reserve_cues_space) {
1632 mkv->cues_pos = avio_tell(pb);
1633 put_ebml_void(pb, mkv->reserve_cues_space);
1636 av_init_packet(&mkv->cur_audio_pkt);
1637 mkv->cur_audio_pkt.size = 0;
1638 mkv->cluster_pos = -1;
1642 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1643 // after 4k and on a keyframe
1645 if (mkv->cluster_time_limit < 0)
1646 mkv->cluster_time_limit = 5000;
1647 if (mkv->cluster_size_limit < 0)
1648 mkv->cluster_size_limit = 5 * 1024 * 1024;
1650 if (mkv->cluster_time_limit < 0)
1651 mkv->cluster_time_limit = 1000;
1652 if (mkv->cluster_size_limit < 0)
1653 mkv->cluster_size_limit = 32 * 1024;
1662 static int mkv_blockgroup_size(int pkt_size)
1664 int size = pkt_size + 4;
1665 size += ebml_num_size(size);
1666 size += 2; // EBML ID for block and block duration
1667 size += 8; // max size of block duration
1668 size += ebml_num_size(size);
1669 size += 1; // blockgroup EBML ID
1673 static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1680 dst = av_malloc(srclen);
1682 return AVERROR(ENOMEM);
1684 while (srclen >= WV_HEADER_SIZE) {
1687 ret = ff_wv_parse_header(&header, src);
1690 src += WV_HEADER_SIZE;
1691 srclen -= WV_HEADER_SIZE;
1693 if (srclen < header.blocksize) {
1694 ret = AVERROR_INVALIDDATA;
1698 if (header.initial) {
1699 AV_WL32(dst + offset, header.samples);
1702 AV_WL32(dst + offset, header.flags);
1703 AV_WL32(dst + offset + 4, header.crc);
1706 if (!(header.initial && header.final)) {
1707 AV_WL32(dst + offset, header.blocksize);
1711 memcpy(dst + offset, src, header.blocksize);
1712 src += header.blocksize;
1713 srclen -= header.blocksize;
1714 offset += header.blocksize;
1726 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1727 unsigned int blockid, AVPacket *pkt, int keyframe)
1729 MatroskaMuxContext *mkv = s->priv_data;
1730 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1731 uint8_t *data = NULL, *side_data = NULL;
1732 int offset = 0, size = pkt->size, side_data_size = 0;
1733 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1734 uint64_t additional_id = 0;
1735 int64_t discard_padding = 0;
1736 uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1));
1737 ebml_master block_group, block_additions, block_more;
1739 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1740 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n",
1741 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration,
1743 if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 &&
1744 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1745 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1746 else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 &&
1747 (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1))
1748 /* extradata is Annex B, assume the bitstream is too and convert it */
1749 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1750 else if (par->codec_id == AV_CODEC_ID_WAVPACK) {
1751 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1753 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1759 if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) {
1760 /* Matroska specification requires to remove the first QuickTime atom
1766 side_data = av_packet_get_side_data(pkt,
1767 AV_PKT_DATA_SKIP_SAMPLES,
1770 if (side_data && side_data_size >= 10) {
1771 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1772 (AVRational){1, par->sample_rate},
1773 (AVRational){1, 1000000000});
1776 side_data = av_packet_get_side_data(pkt,
1777 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1780 additional_id = AV_RB64(side_data);
1782 side_data_size -= 8;
1785 if ((side_data_size && additional_id == 1) || discard_padding) {
1786 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1787 blockid = MATROSKA_ID_BLOCK;
1790 put_ebml_id(pb, blockid);
1791 put_ebml_num(pb, size + 4, 0);
1792 // this assumes stream_index is less than 126
1793 avio_w8(pb, 0x80 | track_number);
1794 avio_wb16(pb, ts - mkv->cluster_pts);
1795 avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0);
1796 avio_write(pb, data + offset, size);
1797 if (data != pkt->data)
1800 if (blockid == MATROSKA_ID_BLOCK && !keyframe) {
1801 put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE,
1802 mkv->last_track_timestamp[track_number - 1]);
1804 mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts;
1806 if (discard_padding) {
1807 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1810 if (side_data_size && additional_id == 1) {
1811 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1812 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1813 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1814 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1815 put_ebml_num(pb, side_data_size, 0);
1816 avio_write(pb, side_data, side_data_size);
1817 end_ebml_master(pb, block_more);
1818 end_ebml_master(pb, block_additions);
1820 if ((side_data_size && additional_id == 1) || discard_padding) {
1821 end_ebml_master(pb, block_group);
1825 static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1827 MatroskaMuxContext *mkv = s->priv_data;
1828 ebml_master blockgroup;
1829 int id_size, settings_size, size;
1830 uint8_t *id, *settings;
1831 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1832 const int flags = 0;
1835 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1839 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1842 size = id_size + 1 + settings_size + 1 + pkt->size;
1844 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1845 "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n",
1846 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1848 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1850 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1851 put_ebml_num(pb, size + 4, 0);
1852 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1853 avio_wb16(pb, ts - mkv->cluster_pts);
1855 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1857 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1858 end_ebml_master(pb, blockgroup);
1860 return pkt->duration;
1863 static void mkv_flush_dynbuf(AVFormatContext *s)
1865 MatroskaMuxContext *mkv = s->priv_data;
1872 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1873 avio_write(s->pb, dyn_buf, bufsize);
1878 static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1880 MatroskaMuxContext *mkv = s->priv_data;
1883 if (s->pb->seekable) {
1889 av_log(s, AV_LOG_DEBUG,
1890 "Starting new cluster at offset %" PRIu64 " bytes, "
1891 "pts %" PRIu64 "dts %" PRIu64 "\n",
1892 avio_tell(pb), pkt->pts, pkt->dts);
1893 end_ebml_master(pb, mkv->cluster);
1894 mkv->cluster_pos = -1;
1896 mkv_flush_dynbuf(s);
1900 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1902 MatroskaMuxContext *mkv = s->priv_data;
1903 AVIOContext *pb = s->pb;
1904 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
1905 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1906 int duration = pkt->duration;
1908 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1909 int64_t relative_packet_pos;
1910 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1912 if (ts == AV_NOPTS_VALUE) {
1913 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1914 return AVERROR(EINVAL);
1916 ts += mkv->tracks[pkt->stream_index].ts_offset;
1918 if (mkv->cluster_pos != -1) {
1919 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1920 if ((int16_t)cluster_time != cluster_time) {
1921 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1922 mkv_start_new_cluster(s, pkt);
1926 if (!s->pb->seekable) {
1928 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1930 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1937 if (mkv->cluster_pos == -1) {
1938 mkv->cluster_pos = avio_tell(s->pb);
1939 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1940 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1941 mkv->cluster_pts = FFMAX(0, ts);
1944 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1946 if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1947 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
1948 if (s->pb->seekable && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
1949 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1950 if (ret < 0) return ret;
1953 if (par->codec_id == AV_CODEC_ID_WEBVTT) {
1954 duration = mkv_write_vtt_blocks(s, pb, pkt);
1956 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1957 mkv_blockgroup_size(pkt->size));
1959 #if FF_API_CONVERGENCE_DURATION
1960 FF_DISABLE_DEPRECATION_WARNINGS
1961 /* For backward compatibility, prefer convergence_duration. */
1962 if (pkt->convergence_duration > 0) {
1963 duration = pkt->convergence_duration;
1965 FF_ENABLE_DEPRECATION_WARNINGS
1967 /* All subtitle blocks are considered to be keyframes. */
1968 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1);
1969 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1970 end_ebml_master(pb, blockgroup);
1973 if (s->pb->seekable) {
1974 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1975 mkv->cluster_pos, relative_packet_pos, duration);
1981 mkv->duration = FFMAX(mkv->duration, ts + duration);
1983 if (mkv->stream_durations)
1984 mkv->stream_durations[pkt->stream_index] =
1985 FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration);
1990 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1992 MatroskaMuxContext *mkv = s->priv_data;
1993 int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type;
1994 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1996 int64_t cluster_time;
1998 int start_new_cluster;
2000 if (mkv->tracks[pkt->stream_index].write_dts)
2001 cluster_time = pkt->dts - mkv->cluster_pts;
2003 cluster_time = pkt->pts - mkv->cluster_pts;
2004 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
2006 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
2007 // after 4k and on a keyframe
2008 if (s->pb->seekable) {
2009 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
2011 cluster_size = avio_tell(mkv->dyn_bc);
2014 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
2015 // WebM DASH specification states that the first block of every cluster
2016 // has to be a key frame. So for DASH video, we only create a cluster
2017 // on seeing key frames.
2018 start_new_cluster = keyframe;
2019 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
2020 (mkv->cluster_pos == -1 ||
2021 cluster_time > mkv->cluster_time_limit)) {
2022 // For DASH audio, we create a Cluster based on cluster_time_limit
2023 start_new_cluster = 1;
2024 } else if (!mkv->is_dash &&
2025 (cluster_size > mkv->cluster_size_limit ||
2026 cluster_time > mkv->cluster_time_limit ||
2027 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
2028 cluster_size > 4 * 1024))) {
2029 start_new_cluster = 1;
2031 start_new_cluster = 0;
2034 if (mkv->cluster_pos != -1 && start_new_cluster) {
2035 mkv_start_new_cluster(s, pkt);
2038 // check if we have an audio packet cached
2039 if (mkv->cur_audio_pkt.size > 0) {
2040 // for DASH audio, a CuePoint has to be added when there is a new cluster.
2041 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
2042 mkv->is_dash ? start_new_cluster : 0);
2043 av_packet_unref(&mkv->cur_audio_pkt);
2045 av_log(s, AV_LOG_ERROR,
2046 "Could not write cached audio packet ret:%d\n", ret);
2051 // buffer an audio packet to ensure the packet containing the video
2052 // keyframe's timecode is contained in the same cluster for WebM
2053 if (codec_type == AVMEDIA_TYPE_AUDIO) {
2054 ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
2056 ret = mkv_write_packet_internal(s, pkt, 0);
2060 static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
2062 MatroskaMuxContext *mkv = s->priv_data;
2064 if (s->pb->seekable)
2069 if (mkv->cluster_pos != -1) {
2070 av_log(s, AV_LOG_DEBUG,
2071 "Flushing cluster at offset %" PRIu64 " bytes\n",
2073 end_ebml_master(pb, mkv->cluster);
2074 mkv->cluster_pos = -1;
2076 mkv_flush_dynbuf(s);
2081 return mkv_write_packet(s, pkt);
2084 static int mkv_write_trailer(AVFormatContext *s)
2086 MatroskaMuxContext *mkv = s->priv_data;
2087 AVIOContext *pb = s->pb;
2088 int64_t currentpos, cuespos;
2091 // check if we have an audio packet cached
2092 if (mkv->cur_audio_pkt.size > 0) {
2093 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
2094 av_packet_unref(&mkv->cur_audio_pkt);
2096 av_log(s, AV_LOG_ERROR,
2097 "Could not write cached audio packet ret:%d\n", ret);
2103 end_ebml_master(mkv->dyn_bc, mkv->cluster);
2104 mkv_flush_dynbuf(s);
2105 } else if (mkv->cluster_pos != -1) {
2106 end_ebml_master(pb, mkv->cluster);
2109 if (mkv->mode != MODE_WEBM) {
2110 ret = mkv_write_chapters(s);
2116 if (mkv->cues->num_entries) {
2117 if (mkv->reserve_cues_space) {
2120 currentpos = avio_tell(pb);
2121 avio_seek(pb, mkv->cues_pos, SEEK_SET);
2123 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2124 cues_end = avio_tell(pb);
2125 if (cues_end > cuespos + mkv->reserve_cues_space) {
2126 av_log(s, AV_LOG_ERROR,
2127 "Insufficient space reserved for cues: %d "
2128 "(needed: %" PRId64 ").\n",
2129 mkv->reserve_cues_space, cues_end - cuespos);
2130 return AVERROR(EINVAL);
2133 if (cues_end < cuespos + mkv->reserve_cues_space)
2134 put_ebml_void(pb, mkv->reserve_cues_space -
2135 (cues_end - cuespos));
2137 avio_seek(pb, currentpos, SEEK_SET);
2139 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
2142 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
2148 mkv_write_seekhead(pb, mkv);
2150 // update the duration
2151 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
2152 currentpos = avio_tell(pb);
2153 avio_seek(pb, mkv->duration_offset, SEEK_SET);
2154 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
2156 // update stream durations
2157 if (mkv->stream_durations) {
2159 for (i = 0; i < s->nb_streams; ++i) {
2160 AVStream *st = s->streams[i];
2161 double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base);
2162 char duration_string[20] = "";
2164 av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i,
2165 mkv->stream_durations[i]);
2167 if (!mkv->is_live && mkv->stream_duration_offsets[i] > 0) {
2168 avio_seek(pb, mkv->stream_duration_offsets[i], SEEK_SET);
2170 snprintf(duration_string, 20, "%02d:%02d:%012.9f",
2171 (int) duration_sec / 3600, ((int) duration_sec / 60) % 60,
2172 fmod(duration_sec, 60));
2174 put_ebml_binary(pb, MATROSKA_ID_TAGSTRING, duration_string, 20);
2179 avio_seek(pb, currentpos, SEEK_SET);
2182 if (!mkv->is_live) {
2183 end_ebml_master(pb, mkv->segment);
2190 static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
2193 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
2194 if (ff_mkv_codec_tags[i].id == codec_id)
2197 if (std_compliance < FF_COMPLIANCE_NORMAL) {
2198 enum AVMediaType type = avcodec_get_type(codec_id);
2199 // mkv theoretically supports any video/audio through VFW/ACM
2200 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
2207 static int mkv_init(struct AVFormatContext *s)
2211 if (s->avoid_negative_ts < 0) {
2212 s->avoid_negative_ts = 1;
2213 s->internal->avoid_negative_ts_use_pts = 1;
2216 for (i = 0; i < s->nb_streams; i++) {
2217 // ms precision is the de-facto standard timescale for mkv files
2218 avpriv_set_pts_info(s->streams[i], 64, 1, 1000);
2224 static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2227 AVStream *st = s->streams[pkt->stream_index];
2229 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
2230 if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0)
2231 ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL);
2232 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) {
2233 ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
2239 static const AVCodecTag additional_audio_tags[] = {
2240 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
2241 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
2242 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
2243 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
2244 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
2245 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
2246 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
2247 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
2248 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
2249 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
2250 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
2251 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2252 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2255 static const AVCodecTag additional_video_tags[] = {
2256 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2257 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2258 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2259 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2260 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2261 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2264 static const AVCodecTag additional_subtitle_tags[] = {
2265 { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF },
2266 { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF },
2267 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2270 #define OFFSET(x) offsetof(MatroskaMuxContext, x)
2271 #define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2272 static const AVOption options[] = {
2273 { "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 },
2274 { "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 },
2275 { "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 },
2276 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2277 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2278 { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2279 { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
2283 #if CONFIG_MATROSKA_MUXER
2284 static const AVClass matroska_class = {
2285 .class_name = "matroska muxer",
2286 .item_name = av_default_item_name,
2288 .version = LIBAVUTIL_VERSION_INT,
2291 AVOutputFormat ff_matroska_muxer = {
2293 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2294 .mime_type = "video/x-matroska",
2295 .extensions = "mkv",
2296 .priv_data_size = sizeof(MatroskaMuxContext),
2297 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2298 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2299 .video_codec = CONFIG_LIBX264_ENCODER ?
2300 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2302 .write_header = mkv_write_header,
2303 .write_packet = mkv_write_flush_packet,
2304 .write_trailer = mkv_write_trailer,
2305 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2306 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2307 .codec_tag = (const AVCodecTag* const []){
2308 ff_codec_bmp_tags, ff_codec_wav_tags,
2309 additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0
2311 .subtitle_codec = AV_CODEC_ID_ASS,
2312 .query_codec = mkv_query_codec,
2313 .check_bitstream = mkv_check_bitstream,
2314 .priv_class = &matroska_class,
2318 #if CONFIG_WEBM_MUXER
2319 static const AVClass webm_class = {
2320 .class_name = "webm muxer",
2321 .item_name = av_default_item_name,
2323 .version = LIBAVUTIL_VERSION_INT,
2326 AVOutputFormat ff_webm_muxer = {
2328 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2329 .mime_type = "video/webm",
2330 .extensions = "webm",
2331 .priv_data_size = sizeof(MatroskaMuxContext),
2332 .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS,
2333 .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8,
2334 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2336 .write_header = mkv_write_header,
2337 .write_packet = mkv_write_flush_packet,
2338 .write_trailer = mkv_write_trailer,
2339 .check_bitstream = mkv_check_bitstream,
2340 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2341 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2342 .priv_class = &webm_class,
2346 #if CONFIG_MATROSKA_AUDIO_MUXER
2347 static const AVClass mka_class = {
2348 .class_name = "matroska audio muxer",
2349 .item_name = av_default_item_name,
2351 .version = LIBAVUTIL_VERSION_INT,
2353 AVOutputFormat ff_matroska_audio_muxer = {
2355 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2356 .mime_type = "audio/x-matroska",
2357 .extensions = "mka",
2358 .priv_data_size = sizeof(MatroskaMuxContext),
2359 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2360 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2361 .video_codec = AV_CODEC_ID_NONE,
2363 .write_header = mkv_write_header,
2364 .write_packet = mkv_write_flush_packet,
2365 .write_trailer = mkv_write_trailer,
2366 .check_bitstream = mkv_check_bitstream,
2367 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2369 .codec_tag = (const AVCodecTag* const []){
2370 ff_codec_wav_tags, additional_audio_tags, 0
2372 .priv_class = &mka_class,