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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavformat / matroskaenc.c
CommitLineData
2ba45a60
DM		 1/*
2 * Matroska muxer
3 * Copyright (c) 2007 David Conrad
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22#include <stdint.h>
23
24#include "avc.h"
25#include "hevc.h"
26#include "avformat.h"
27#include "avio_internal.h"
28#include "avlanguage.h"
29#include "flacenc.h"
30#include "internal.h"
31#include "isom.h"
32#include "matroska.h"
33#include "riff.h"
34#include "subtitles.h"
35#include "vorbiscomment.h"
36#include "wv.h"
37
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/mathematics.h"
45#include "libavutil/opt.h"
46#include "libavutil/random_seed.h"
47#include "libavutil/samplefmt.h"
48#include "libavutil/sha.h"
49#include "libavutil/stereo3d.h"
50
51#include "libavcodec/xiph.h"
52#include "libavcodec/mpeg4audio.h"
53#include "libavcodec/internal.h"
54
55typedef struct ebml_master {
56 int64_t pos; ///< absolute offset in the file where the master's elements start
57 int sizebytes; ///< how many bytes were reserved for the size
58} ebml_master;
59
60typedef struct mkv_seekhead_entry {
61 unsigned int elementid;
62 uint64_t segmentpos;
63} mkv_seekhead_entry;
64
65typedef struct mkv_seekhead {
66 int64_t filepos;
67 int64_t segment_offset; ///< the file offset to the beginning of the segment
68 int reserved_size; ///< -1 if appending to file
69 int max_entries;
70 mkv_seekhead_entry *entries;
71 int num_entries;
72} mkv_seekhead;
73
74typedef struct {
75 uint64_t pts;
76 int stream_idx;
77 int tracknum;
78 int64_t cluster_pos; ///< file offset of the cluster containing the block
79 int64_t relative_pos; ///< relative offset from the position of the cluster containing the block
80 int64_t duration; ///< duration of the block according to time base
81} mkv_cuepoint;
82
83typedef struct {
84 int64_t segment_offset;
85 mkv_cuepoint *entries;
86 int num_entries;
87} mkv_cues;
88
89typedef struct {
90 int write_dts;
91 int has_cue;
92 int64_t ts_offset;
93} mkv_track;
94
95#define MODE_MATROSKAv2 0x01
96#define MODE_WEBM 0x02
97
98typedef struct MatroskaMuxContext {
99 const AVClass *class;
100 int mode;
101 AVIOContext *dyn_bc;
102 ebml_master segment;
103 int64_t segment_offset;
104 ebml_master cluster;
105 int64_t cluster_pos; ///< file offset of the current cluster
106 int64_t cluster_pts;
107 int64_t duration_offset;
108 int64_t duration;
109 mkv_seekhead *main_seekhead;
110 mkv_cues *cues;
111 mkv_track *tracks;
112
113 AVPacket cur_audio_pkt;
114
115 int have_attachments;
116
117 int reserve_cues_space;
118 int cluster_size_limit;
119 int64_t cues_pos;
120 int64_t cluster_time_limit;
121 int is_dash;
122 int dash_track_number;
123
124 uint32_t chapter_id_offset;
125 int wrote_chapters;
126} MatroskaMuxContext;
127
128
129/** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
130 * offset, 4 bytes for target EBML ID */
131#define MAX_SEEKENTRY_SIZE 21
132
133/** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4
134 * 8-byte uint max */
135#define MAX_CUETRACKPOS_SIZE 42
136
137/** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
138#define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks
139
140/** Seek preroll value for opus */
141#define OPUS_SEEK_PREROLL 80000000
142
143static int ebml_id_size(unsigned int id)
144{
145 return (av_log2(id + 1) - 1) / 7 + 1;
146}
147
148static void put_ebml_id(AVIOContext *pb, unsigned int id)
149{
150 int i = ebml_id_size(id);
151 while (i--)
152 avio_w8(pb, (uint8_t)(id >> (i * 8)));
153}
154
155/**
156 * Write an EBML size meaning "unknown size".
157 *
158 * @param bytes The number of bytes the size should occupy (maximum: 8).
159 */
160static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
161{
162 av_assert0(bytes <= 8);
163 avio_w8(pb, 0x1ff >> bytes);
164 ffio_fill(pb, 0xff, bytes - 1);
165}
166
167/**
168 * Calculate how many bytes are needed to represent a given number in EBML.
169 */
170static int ebml_num_size(uint64_t num)
171{
172 int bytes = 1;
173 while ((num + 1) >> bytes * 7)
174 bytes++;
175 return bytes;
176}
177
178/**
179 * Write a number in EBML variable length format.
180 *
181 * @param bytes The number of bytes that need to be used to write the number.
182 * If zero, any number of bytes can be used.
183 */
184static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
185{
186 int i, needed_bytes = ebml_num_size(num);
187
188 // sizes larger than this are currently undefined in EBML
189 av_assert0(num < (1ULL << 56) - 1);
190
191 if (bytes == 0)
192 // don't care how many bytes are used, so use the min
193 bytes = needed_bytes;
194 // the bytes needed to write the given size would exceed the bytes
195 // that we need to use, so write unknown size. This shouldn't happen.
196 av_assert0(bytes >= needed_bytes);
197
198 num |= 1ULL << bytes * 7;
199 for (i = bytes - 1; i >= 0; i--)
200 avio_w8(pb, (uint8_t)(num >> i * 8));
201}
202
203static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
204{
205 int i, bytes = 1;
206 uint64_t tmp = val;
207 while (tmp >>= 8)
208 bytes++;
209
210 put_ebml_id(pb, elementid);
211 put_ebml_num(pb, bytes, 0);
212 for (i = bytes - 1; i >= 0; i--)
213 avio_w8(pb, (uint8_t)(val >> i * 8));
214}
215
216static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val)
217{
218 int i, bytes = 1;
219 uint64_t tmp = 2*(val < 0 ? val^-1 : val);
220
221 while (tmp>>=8) bytes++;
222
223 put_ebml_id(pb, elementid);
224 put_ebml_num(pb, bytes, 0);
225 for (i = bytes - 1; i >= 0; i--)
226 avio_w8(pb, (uint8_t)(val >> i * 8));
227}
228
229static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
230{
231 put_ebml_id(pb, elementid);
232 put_ebml_num(pb, 8, 0);
233 avio_wb64(pb, av_double2int(val));
234}
235
236static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
237 const void *buf, int size)
238{
239 put_ebml_id(pb, elementid);
240 put_ebml_num(pb, size, 0);
241 avio_write(pb, buf, size);
242}
243
244static void put_ebml_string(AVIOContext *pb, unsigned int elementid,
245 const char *str)
246{
247 put_ebml_binary(pb, elementid, str, strlen(str));
248}
249
250/**
251 * Write a void element of a given size. Useful for reserving space in
252 * the file to be written to later.
253 *
254 * @param size The number of bytes to reserve, which must be at least 2.
255 */
256static void put_ebml_void(AVIOContext *pb, uint64_t size)
257{
258 int64_t currentpos = avio_tell(pb);
259
260 av_assert0(size >= 2);
261
262 put_ebml_id(pb, EBML_ID_VOID);
263 // we need to subtract the length needed to store the size from the
264 // size we need to reserve so 2 cases, we use 8 bytes to store the
265 // size if possible, 1 byte otherwise
266 if (size < 10)
267 put_ebml_num(pb, size - 1, 0);
268 else
269 put_ebml_num(pb, size - 9, 8);
270 ffio_fill(pb, 0, currentpos + size - avio_tell(pb));
271}
272
273static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid,
274 uint64_t expectedsize)
275{
276 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
277 put_ebml_id(pb, elementid);
278 put_ebml_size_unknown(pb, bytes);
279 return (ebml_master) {avio_tell(pb), bytes };
280}
281
282static void end_ebml_master(AVIOContext *pb, ebml_master master)
283{
284 int64_t pos = avio_tell(pb);
285
286 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
287 return;
288 put_ebml_num(pb, pos - master.pos, master.sizebytes);
289 avio_seek(pb, pos, SEEK_SET);
290}
291
292static void put_xiph_size(AVIOContext *pb, int size)
293{
294 ffio_fill(pb, 255, size / 255);
295 avio_w8(pb, size % 255);
296}
297
298/**
299 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
300 * elements. If a maximum number of elements is specified, enough space
301 * will be reserved at the current file location to write a seek head of
302 * that size.
303 *
304 * @param segment_offset The absolute offset to the position in the file
305 * where the segment begins.
306 * @param numelements The maximum number of elements that will be indexed
307 * by this seek head, 0 if unlimited.
308 */
309static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset,
310 int numelements)
311{
312 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
313 if (!new_seekhead)
314 return NULL;
315
316 new_seekhead->segment_offset = segment_offset;
317
318 if (numelements > 0) {
319 new_seekhead->filepos = avio_tell(pb);
320 // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
321 // and size, and 3 bytes to guarantee that an EBML void element
322 // will fit afterwards
323 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
324 new_seekhead->max_entries = numelements;
325 put_ebml_void(pb, new_seekhead->reserved_size);
326 }
327 return new_seekhead;
328}
329
330static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
331{
332 mkv_seekhead_entry *entries = seekhead->entries;
333
334 // don't store more elements than we reserved space for
335 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
336 return -1;
337
338 entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry));
339 if (!entries)
340 return AVERROR(ENOMEM);
341 seekhead->entries = entries;
342
343 seekhead->entries[seekhead->num_entries].elementid = elementid;
344 seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
345
346 return 0;
347}
348
349/**
350 * Write the seek head to the file and free it. If a maximum number of
351 * elements was specified to mkv_start_seekhead(), the seek head will
352 * be written at the location reserved for it. Otherwise, it is written
353 * at the current location in the file.
354 *
355 * @return The file offset where the seekhead was written,
356 * -1 if an error occurred.
357 */
358static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
359{
360 ebml_master metaseek, seekentry;
361 int64_t currentpos;
362 int i;
363
364 currentpos = avio_tell(pb);
365
366 if (seekhead->reserved_size > 0) {
367 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
368 currentpos = -1;
369 goto fail;
370 }
371 }
372
373 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
374 for (i = 0; i < seekhead->num_entries; i++) {
375 mkv_seekhead_entry *entry = &seekhead->entries[i];
376
377 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
378
379 put_ebml_id(pb, MATROSKA_ID_SEEKID);
380 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
381 put_ebml_id(pb, entry->elementid);
382
383 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
384 end_ebml_master(pb, seekentry);
385 }
386 end_ebml_master(pb, metaseek);
387
388 if (seekhead->reserved_size > 0) {
389 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
390 put_ebml_void(pb, remaining);
391 avio_seek(pb, currentpos, SEEK_SET);
392
393 currentpos = seekhead->filepos;
394 }
395fail:
396 av_freep(&seekhead->entries);
397 av_free(seekhead);
398
399 return currentpos;
400}
401
402static mkv_cues *mkv_start_cues(int64_t segment_offset)
403{
404 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
405 if (!cues)
406 return NULL;
407
408 cues->segment_offset = segment_offset;
409 return cues;
410}
411
412static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts,
413 int64_t cluster_pos, int64_t relative_pos, int64_t duration)
414{
415 mkv_cuepoint *entries = cues->entries;
416
417 if (ts < 0)
418 return 0;
419
420 entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint));
421 if (!entries)
422 return AVERROR(ENOMEM);
423 cues->entries = entries;
424
425 cues->entries[cues->num_entries].pts = ts;
426 cues->entries[cues->num_entries].stream_idx = stream;
427 cues->entries[cues->num_entries].tracknum = tracknum;
428 cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset;
429 cues->entries[cues->num_entries].relative_pos = relative_pos;
430 cues->entries[cues->num_entries++].duration = duration;
431
432 return 0;
433}
434
435static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks)
436{
437 AVIOContext *pb = s->pb;
438 ebml_master cues_element;
439 int64_t currentpos;
440 int i, j;
441
442 currentpos = avio_tell(pb);
443 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
444
445 for (i = 0; i < cues->num_entries; i++) {
446 ebml_master cuepoint, track_positions;
447 mkv_cuepoint *entry = &cues->entries[i];
448 uint64_t pts = entry->pts;
449 int ctp_nb = 0;
450
451 // Calculate the number of entries, so we know the element size
452 for (j = 0; j < num_tracks; j++)
453 tracks[j].has_cue = 0;
454 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
455 int tracknum = entry[j].stream_idx;
456 av_assert0(tracknum>=0 && tracknum<num_tracks);
457 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
458 continue;
459 tracks[tracknum].has_cue = 1;
460 ctp_nb ++;
461 }
462
463 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb));
464 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
465
466 // put all the entries from different tracks that have the exact same
467 // timestamp into the same CuePoint
468 for (j = 0; j < num_tracks; j++)
469 tracks[j].has_cue = 0;
470 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
471 int tracknum = entry[j].stream_idx;
472 av_assert0(tracknum>=0 && tracknum<num_tracks);
473 if (tracks[tracknum].has_cue && s->streams[tracknum]->codec->codec_type != AVMEDIA_TYPE_SUBTITLE)
474 continue;
475 tracks[tracknum].has_cue = 1;
476 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
477 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
478 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos);
479 put_ebml_uint(pb, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos);
480 if (entry[j].duration != -1)
481 put_ebml_uint(pb, MATROSKA_ID_CUEDURATION , entry[j].duration);
482 end_ebml_master(pb, track_positions);
483 }
484 i += j - 1;
485 end_ebml_master(pb, cuepoint);
486 }
487 end_ebml_master(pb, cues_element);
488
489 return currentpos;
490}
491
492static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
493{
494 uint8_t *header_start[3];
495 int header_len[3];
496 int first_header_size;
497 int j;
498
499 if (codec->codec_id == AV_CODEC_ID_VORBIS)
500 first_header_size = 30;
501 else
502 first_header_size = 42;
503
504 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
505 first_header_size, header_start, header_len) < 0) {
506 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
507 return -1;
508 }
509
510 avio_w8(pb, 2); // number packets - 1
511 for (j = 0; j < 2; j++) {
512 put_xiph_size(pb, header_len[j]);
513 }
514 for (j = 0; j < 3; j++)
515 avio_write(pb, header_start[j], header_len[j]);
516
517 return 0;
518}
519
520static int put_wv_codecpriv(AVIOContext *pb, AVCodecContext *codec)
521{
522 if (codec->extradata && codec->extradata_size == 2)
523 avio_write(pb, codec->extradata, 2);
524 else
525 avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs
526 return 0;
527}
528
529static int put_flac_codecpriv(AVFormatContext *s,
530 AVIOContext *pb, AVCodecContext *codec)
531{
532 int write_comment = (codec->channel_layout &&
533 !(codec->channel_layout & ~0x3ffffULL) &&
534 !ff_flac_is_native_layout(codec->channel_layout));
535 int ret = ff_flac_write_header(pb, codec->extradata, codec->extradata_size,
536 !write_comment);
537
538 if (ret < 0)
539 return ret;
540
541 if (write_comment) {
542 const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ?
543 "Lavf" : LIBAVFORMAT_IDENT;
544 AVDictionary *dict = NULL;
545 uint8_t buf[32], *data, *p;
546 int len;
547
548 snprintf(buf, sizeof(buf), "0x%"PRIx64, codec->channel_layout);
549 av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0);
550
551 len = ff_vorbiscomment_length(dict, vendor);
552 data = av_malloc(len + 4);
553 if (!data) {
554 av_dict_free(&dict);
555 return AVERROR(ENOMEM);
556 }
557
558 data[0] = 0x84;
559 AV_WB24(data + 1, len);
560
561 p = data + 4;
562 ff_vorbiscomment_write(&p, &dict, vendor);
563
564 avio_write(pb, data, len + 4);
565
566 av_freep(&data);
567 av_dict_free(&dict);
568 }
569
570 return 0;
571}
572
573static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec,
574 int *sample_rate, int *output_sample_rate)
575{
576 MPEG4AudioConfig mp4ac;
577
578 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
579 codec->extradata_size * 8, 1) < 0) {
580 av_log(s, AV_LOG_WARNING,
581 "Error parsing AAC extradata, unable to determine samplerate.\n");
582 return;
583 }
584
585 *sample_rate = mp4ac.sample_rate;
586 *output_sample_rate = mp4ac.ext_sample_rate;
587}
588
589static int mkv_write_native_codecprivate(AVFormatContext *s,
590 AVCodecContext *codec,
591 AVIOContext *dyn_cp)
592{
593 switch (codec->codec_id) {
594 case AV_CODEC_ID_VORBIS:
595 case AV_CODEC_ID_THEORA:
596 return put_xiph_codecpriv(s, dyn_cp, codec);
597 case AV_CODEC_ID_FLAC:
598 return put_flac_codecpriv(s, dyn_cp, codec);
599 case AV_CODEC_ID_WAVPACK:
600 return put_wv_codecpriv(dyn_cp, codec);
601 case AV_CODEC_ID_H264:
602 return ff_isom_write_avcc(dyn_cp, codec->extradata,
603 codec->extradata_size);
604 case AV_CODEC_ID_HEVC:
605 return ff_isom_write_hvcc(dyn_cp, codec->extradata,
606 codec->extradata_size, 0);
607 case AV_CODEC_ID_ALAC:
608 if (codec->extradata_size < 36) {
609 av_log(s, AV_LOG_ERROR,
610 "Invalid extradata found, ALAC expects a 36-byte "
611 "QuickTime atom.");
612 return AVERROR_INVALIDDATA;
613 } else
614 avio_write(dyn_cp, codec->extradata + 12,
615 codec->extradata_size - 12);
616 break;
617 default:
618 if (codec->codec_id == AV_CODEC_ID_PRORES &&
619 ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == AV_CODEC_ID_PRORES) {
620 avio_wl32(dyn_cp, codec->codec_tag);
621 } else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA)
622 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
623 }
624
625 return 0;
626}
627
628static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb,
629 AVCodecContext *codec, int native_id,
630 int qt_id)
631{
632 AVIOContext *dyn_cp;
633 uint8_t *codecpriv;
634 int ret, codecpriv_size;
635
636 ret = avio_open_dyn_buf(&dyn_cp);
637 if (ret < 0)
638 return ret;
639
640 if (native_id) {
641 ret = mkv_write_native_codecprivate(s, codec, dyn_cp);
642 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
643 if (qt_id) {
644 if (!codec->codec_tag)
645 codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags,
646 codec->codec_id);
647 if (codec->extradata_size) {
648 if ( ff_codec_get_id(ff_codec_movvideo_tags, codec->codec_tag) == codec->codec_id
649 && ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(codec->extradata + 4)) != codec->codec_id
650 ) {
651 int i;
652 avio_wb32(dyn_cp, 0x5a + codec->extradata_size);
653 avio_wl32(dyn_cp, codec->codec_tag);
654 for(i = 0; i < 0x5a - 8; i++)
655 avio_w8(dyn_cp, 0);
656 }
657 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
658 }
659 } else {
660 if (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id))
661 av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n",
662 avcodec_get_name(codec->codec_id));
663
664 if (!codec->codec_tag)
665 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags,
666 codec->codec_id);
667 if (!codec->codec_tag) {
668 av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n",
669 avcodec_get_name(codec->codec_id));
670 ret = AVERROR(EINVAL);
671 }
672
673 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0, 0);
674 }
675 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
676 unsigned int tag;
677 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
678 if (!tag) {
679 av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n",
680 avcodec_get_name(codec->codec_id));
681 ret = AVERROR(EINVAL);
682 }
683 if (!codec->codec_tag)
684 codec->codec_tag = tag;
685
686 ff_put_wav_header(dyn_cp, codec, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
687 }
688
689 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
690 if (codecpriv_size)
691 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv,
692 codecpriv_size);
693 av_free(codecpriv);
694 return ret;
695}
696
697
698static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb,
699 AVStream *st, int mode)
700{
701 int i;
702 int ret = 0;
703 AVDictionaryEntry *tag;
704 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
705
706 // convert metadata into proper side data and add it to the stream
707 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
708 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
709 int stereo_mode = atoi(tag->value);
710
711 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
712 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
713 stereo_mode = i;
714 break;
715 }
716
717 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
718 stereo_mode != 10 && stereo_mode != 12) {
719 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
720 if (ret < 0)
721 return ret;
722 }
723 }
724
725 for (i = 0; i < st->nb_side_data; i++) {
726 AVPacketSideData sd = st->side_data[i];
727 if (sd.type == AV_PKT_DATA_STEREO3D) {
728 AVStereo3D *stereo = (AVStereo3D *)sd.data;
729
730 switch (stereo->type) {
731 case AV_STEREO3D_2D:
732 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
733 break;
734 case AV_STEREO3D_SIDEBYSIDE:
735 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
736 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
737 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
738 break;
739 case AV_STEREO3D_TOPBOTTOM:
740 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
741 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
742 format--;
743 break;
744 case AV_STEREO3D_CHECKERBOARD:
745 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
746 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
747 format--;
748 break;
749 case AV_STEREO3D_LINES:
750 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
751 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
752 format--;
753 break;
754 case AV_STEREO3D_COLUMNS:
755 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
756 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
757 format--;
758 break;
759 case AV_STEREO3D_FRAMESEQUENCE:
760 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
761 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
762 format++;
763 break;
764 }
765 ret = stereo->type;
766
767 break;
768 }
769 }
770
771 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
772 return ret;
773
774 if ((mode == MODE_WEBM &&
775 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
776 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
777 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
778 av_log(s, AV_LOG_ERROR,
779 "The specified stereo mode is not valid.\n");
780 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
781 return AVERROR(EINVAL);
782 }
783
784 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
785
786 return ret;
787}
788
789static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
790 int i, AVIOContext *pb, int default_stream_exists)
791{
792 AVStream *st = s->streams[i];
793 AVCodecContext *codec = st->codec;
794 ebml_master subinfo, track;
795 int native_id = 0;
796 int qt_id = 0;
797 int bit_depth = av_get_bits_per_sample(codec->codec_id);
798 int sample_rate = codec->sample_rate;
799 int output_sample_rate = 0;
800 int display_width_div = 1;
801 int display_height_div = 1;
802 int j, ret;
803 AVDictionaryEntry *tag;
804
805 // ms precision is the de-facto standard timescale for mkv files
806 avpriv_set_pts_info(st, 64, 1, 1000);
807
808 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
809 mkv->have_attachments = 1;
810 return 0;
811 }
812
813 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
814 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
815 if (!bit_depth)
816 bit_depth = codec->bits_per_coded_sample;
817
818 if (codec->codec_id == AV_CODEC_ID_AAC)
819 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
820
821 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
822 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
823 mkv->is_dash ? mkv->dash_track_number : i + 1);
824 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
825 mkv->is_dash ? mkv->dash_track_number : i + 1);
826 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
827
828 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
829 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
830 tag = av_dict_get(st->metadata, "language", NULL, 0);
831 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
832 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
833 } else if (tag && tag->value) {
834 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
835 }
836
837 // The default value for TRACKFLAGDEFAULT is 1, so add element
838 // if we need to clear it.
839 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
840 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
841
842 if (st->disposition & AV_DISPOSITION_FORCED)
843 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
844
845 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
846 const char *codec_id;
847 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
848 codec_id = "D_WEBVTT/CAPTIONS";
849 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
850 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
851 codec_id = "D_WEBVTT/DESCRIPTIONS";
852 native_id = MATROSKA_TRACK_TYPE_METADATA;
853 } else if (st->disposition & AV_DISPOSITION_METADATA) {
854 codec_id = "D_WEBVTT/METADATA";
855 native_id = MATROSKA_TRACK_TYPE_METADATA;
856 } else {
857 codec_id = "D_WEBVTT/SUBTITLES";
858 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
859 }
860 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
861 } else {
862 // look for a codec ID string specific to mkv to use,
863 // if none are found, use AVI codes
864 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
865 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
866 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
867 native_id = 1;
868 break;
869 }
870 }
871 }
872
873 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->delay && codec->codec_id == AV_CODEC_ID_OPUS) {
874// mkv->tracks[i].ts_offset = av_rescale_q(codec->delay,
875// (AVRational){ 1, codec->sample_rate },
876// st->time_base);
877
878 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
879 av_rescale_q(codec->delay, (AVRational){ 1, codec->sample_rate },
880 (AVRational){ 1, 1000000000 }));
881 }
882 if (codec->codec_id == AV_CODEC_ID_OPUS) {
883 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
884 }
885
886 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
887 codec->codec_id == AV_CODEC_ID_VP9 ||
888 codec->codec_id == AV_CODEC_ID_OPUS ||
889 codec->codec_id == AV_CODEC_ID_VORBIS ||
890 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
891 av_log(s, AV_LOG_ERROR,
892 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
893 return AVERROR(EINVAL);
894 }
895
896 switch (codec->codec_type) {
897 case AVMEDIA_TYPE_VIDEO:
898 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
899
900 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
901 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
902 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
903 else
904 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
905
906 if (!native_id &&
907 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
908 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) ||
909 codec->codec_id == AV_CODEC_ID_SVQ1 ||
910 codec->codec_id == AV_CODEC_ID_SVQ3 ||
911 codec->codec_id == AV_CODEC_ID_CINEPAK))
912 qt_id = 1;
913
914 if (qt_id)
915 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
916 else if (!native_id) {
917 // if there is no mkv-specific codec ID, use VFW mode
918 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
919 mkv->tracks[i].write_dts = 1;
920 }
921
922 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
923 // XXX: interlace flag?
924 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
925 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
926
927 // check both side data and metadata for stereo information,
928 // write the result to the bitstream if any is found
929 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode);
930 if (ret < 0)
931 return ret;
932
933 switch (ret) {
934 case AV_STEREO3D_SIDEBYSIDE:
935 case AV_STEREO3D_COLUMNS:
936 display_width_div = 2;
937 break;
938 case AV_STEREO3D_TOPBOTTOM:
939 case AV_STEREO3D_LINES:
940 display_height_div = 2;
941 break;
942 }
943
944 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
945 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
946 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
947 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
948 }
949
950 if (st->sample_aspect_ratio.num) {
951 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
952 if (d_width > INT_MAX) {
953 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
954 return AVERROR(EINVAL);
955 }
956 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
957 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
958 } else if (display_width_div != 1 || display_height_div != 1) {
959 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
960 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
961 }
962
963 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
964 uint32_t color_space = av_le2ne32(codec->codec_tag);
965 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
966 }
967 end_ebml_master(pb, subinfo);
968 break;
969
970 case AVMEDIA_TYPE_AUDIO:
971 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
972
973 if (!native_id)
974 // no mkv-specific ID, use ACM mode
975 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
976
977 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
978 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
979 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
980 if (output_sample_rate)
981 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
982 if (bit_depth)
983 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
984 end_ebml_master(pb, subinfo);
985 break;
986
987 case AVMEDIA_TYPE_SUBTITLE:
988 if (!native_id) {
989 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
990 return AVERROR(ENOSYS);
991 }
992
993 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
994 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
995
996 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
997 break;
998 default:
999 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1000 return AVERROR(EINVAL);
1001 }
1002
1003 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1004 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1005 if (ret < 0)
1006 return ret;
1007 }
1008
1009 end_ebml_master(pb, track);
1010
1011 return 0;
1012}
1013
1014static int mkv_write_tracks(AVFormatContext *s)
1015{
1016 MatroskaMuxContext *mkv = s->priv_data;
1017 AVIOContext *pb = s->pb;
1018 ebml_master tracks;
1019 int i, ret, default_stream_exists = 0;
1020
1021 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1022 if (ret < 0)
1023 return ret;
1024
1025 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1026 for (i = 0; i < s->nb_streams; i++) {
1027 AVStream *st = s->streams[i];
1028 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1029 }
1030 for (i = 0; i < s->nb_streams; i++) {
1031 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1032 if (ret < 0)
1033 return ret;
1034 }
1035 end_ebml_master(pb, tracks);
1036 return 0;
1037}
1038
1039static int mkv_write_chapters(AVFormatContext *s)
1040{
1041 MatroskaMuxContext *mkv = s->priv_data;
1042 AVIOContext *pb = s->pb;
1043 ebml_master chapters, editionentry;
1044 AVRational scale = {1, 1E9};
1045 int i, ret;
1046
1047 if (!s->nb_chapters || mkv->wrote_chapters)
1048 return 0;
1049
1050 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1051 if (ret < 0) return ret;
1052
1053 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1054 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1055 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1056 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1057 for (i = 0; i < s->nb_chapters; i++) {
1058 ebml_master chapteratom, chapterdisplay;
1059 AVChapter *c = s->chapters[i];
1060 AVDictionaryEntry *t = NULL;
1061
1062 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1063 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1064 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
1065 av_rescale_q(c->start, c->time_base, scale));
1066 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
1067 av_rescale_q(c->end, c->time_base, scale));
1068 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1069 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1070 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1071 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1072 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1073 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1074 end_ebml_master(pb, chapterdisplay);
1075 }
1076 end_ebml_master(pb, chapteratom);
1077 }
1078 end_ebml_master(pb, editionentry);
1079 end_ebml_master(pb, chapters);
1080
1081 mkv->wrote_chapters = 1;
1082 return 0;
1083}
1084
1085static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1086{
1087 uint8_t *key = av_strdup(t->key);
1088 uint8_t *p = key;
1089 const uint8_t *lang = NULL;
1090 ebml_master tag;
1091
1092 if ((p = strrchr(p, '-')) &&
1093 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1094 *p = 0;
1095
1096 p = key;
1097 while (*p) {
1098 if (*p == ' ')
1099 *p = '_';
1100 else if (*p >= 'a' && *p <= 'z')
1101 *p -= 'a' - 'A';
1102 p++;
1103 }
1104
1105 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1106 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1107 if (lang)
1108 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1109 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1110 end_ebml_master(pb, tag);
1111
1112 av_freep(&key);
1113}
1114
1115static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1116 unsigned int uid, ebml_master *tags)
1117{
1118 MatroskaMuxContext *mkv = s->priv_data;
1119 ebml_master tag, targets;
1120 AVDictionaryEntry *t = NULL;
1121 int ret;
1122
1123 if (!tags->pos) {
1124 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1125 if (ret < 0) return ret;
1126
1127 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1128 }
1129
1130 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1131 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1132 if (elementid)
1133 put_ebml_uint(s->pb, elementid, uid);
1134 end_ebml_master(s->pb, targets);
1135
1136 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1137 if (av_strcasecmp(t->key, "title") &&
1138 av_strcasecmp(t->key, "stereo_mode") &&
1139 av_strcasecmp(t->key, "encoding_tool"))
1140 mkv_write_simpletag(s->pb, t);
1141
1142 end_ebml_master(s->pb, tag);
1143 return 0;
1144}
1145
1146static int mkv_check_tag(AVDictionary *m)
1147{
1148 AVDictionaryEntry *t = NULL;
1149
1150 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1151 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1152 return 1;
1153
1154 return 0;
1155}
1156
1157static int mkv_write_tags(AVFormatContext *s)
1158{
1159 MatroskaMuxContext *mkv = s->priv_data;
1160 ebml_master tags = {0};
1161 int i, ret;
1162
1163 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1164
1165 if (mkv_check_tag(s->metadata)) {
1166 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1167 if (ret < 0) return ret;
1168 }
1169
1170 for (i = 0; i < s->nb_streams; i++) {
1171 AVStream *st = s->streams[i];
1172
1173 if (!mkv_check_tag(st->metadata))
1174 continue;
1175
1176 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1177 if (ret < 0) return ret;
1178 }
1179
1180 for (i = 0; i < s->nb_chapters; i++) {
1181 AVChapter *ch = s->chapters[i];
1182
1183 if (!mkv_check_tag(ch->metadata))
1184 continue;
1185
1186 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1187 if (ret < 0) return ret;
1188 }
1189
1190 if (tags.pos)
1191 end_ebml_master(s->pb, tags);
1192 return 0;
1193}
1194
1195static int mkv_write_attachments(AVFormatContext *s)
1196{
1197 MatroskaMuxContext *mkv = s->priv_data;
1198 AVIOContext *pb = s->pb;
1199 ebml_master attachments;
1200 AVLFG c;
1201 int i, ret;
1202
1203 if (!mkv->have_attachments)
1204 return 0;
1205
1206 av_lfg_init(&c, av_get_random_seed());
1207
1208 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1209 if (ret < 0) return ret;
1210
1211 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1212
1213 for (i = 0; i < s->nb_streams; i++) {
1214 AVStream *st = s->streams[i];
1215 ebml_master attached_file;
1216 AVDictionaryEntry *t;
1217 const char *mimetype = NULL;
1218 uint64_t fileuid;
1219
1220 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1221 continue;
1222
1223 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1224
1225 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1226 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1227 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1228 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1229 return AVERROR(EINVAL);
1230 }
1231 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1232 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1233 mimetype = t->value;
1234 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1235 int i;
1236 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1237 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1238 mimetype = ff_mkv_mime_tags[i].str;
1239 break;
1240 }
1241 }
1242 if (!mimetype) {
1243 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1244 "it cannot be deduced from the codec id.\n", i);
1245 return AVERROR(EINVAL);
1246 }
1247
1248 if (s->flags & AVFMT_FLAG_BITEXACT) {
1249 struct AVSHA *sha = av_sha_alloc();
1250 uint8_t digest[20];
1251 if (!sha)
1252 return AVERROR(ENOMEM);
1253 av_sha_init(sha, 160);
1254 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1255 av_sha_final(sha, digest);
1256 av_free(sha);
1257 fileuid = AV_RL64(digest);
1258 } else {
1259 fileuid = av_lfg_get(&c);
1260 }
1261 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1262 fileuid, i);
1263
1264 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1265 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1266 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1267 end_ebml_master(pb, attached_file);
1268 }
1269 end_ebml_master(pb, attachments);
1270
1271 return 0;
1272}
1273
1274static int mkv_write_header(AVFormatContext *s)
1275{
1276 MatroskaMuxContext *mkv = s->priv_data;
1277 AVIOContext *pb = s->pb;
1278 ebml_master ebml_header, segment_info;
1279 AVDictionaryEntry *tag;
1280 int ret, i, version = 2;
1281
1282 if (!strcmp(s->oformat->name, "webm"))
1283 mkv->mode = MODE_WEBM;
1284 else
1285 mkv->mode = MODE_MATROSKAv2;
1286
1287 if (s->avoid_negative_ts < 0)
1288 s->avoid_negative_ts = 1;
1289
1290 if (mkv->mode != MODE_WEBM ||
1291 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1292 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1293 version = 4;
1294
1295 for (i = 0; i < s->nb_streams; i++) {
1296 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1297 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1298 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1299 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1300 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1301 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1302 av_log(s, AV_LOG_ERROR,
1303 "The Matroska muxer does not yet support muxing %s\n",
1304 avcodec_get_name(s->streams[i]->codec->codec_id));
1305 return AVERROR_PATCHWELCOME;
1306 }
1307 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1308 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1309 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1310 version = 4;
1311 }
1312
1313 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1314 if (!mkv->tracks)
1315 return AVERROR(ENOMEM);
1316
1317 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1318 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1319 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1320 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1321 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1322 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1323 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1324 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1325 end_ebml_master(pb, ebml_header);
1326
1327 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1328 mkv->segment_offset = avio_tell(pb);
1329
1330 // we write 2 seek heads - one at the end of the file to point to each
1331 // cluster, and one at the beginning to point to all other level one
1332 // elements (including the seek head at the end of the file), which
1333 // isn't more than 10 elements if we only write one of each other
1334 // currently defined level 1 element
1335 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1336 if (!mkv->main_seekhead)
1337 return AVERROR(ENOMEM);
1338
1339 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1340 if (ret < 0) return ret;
1341
1342 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1343 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1344 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1345 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1346 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1347 uint32_t segment_uid[4];
1348 AVLFG lfg;
1349
1350 av_lfg_init(&lfg, av_get_random_seed());
1351
1352 for (i = 0; i < 4; i++)
1353 segment_uid[i] = av_lfg_get(&lfg);
1354
1355 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1356 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1357 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1358 else
1359 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1360 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1361 } else {
1362 const char *ident = "Lavf";
1363 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1364 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1365 }
1366
1367 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1368 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1369 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1370 uint8_t date_utc_buf[8];
1371 AV_WB64(date_utc_buf, date_utc);
1372 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1373 }
1374
1375 // reserve space for the duration
1376 mkv->duration = 0;
1377 mkv->duration_offset = avio_tell(pb);
1378 put_ebml_void(pb, 11); // assumes double-precision float to be written
1379 end_ebml_master(pb, segment_info);
1380
1381 ret = mkv_write_tracks(s);
1382 if (ret < 0)
1383 return ret;
1384
1385 for (i = 0; i < s->nb_chapters; i++)
1386 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1387
1388 if (mkv->mode != MODE_WEBM) {
1389 ret = mkv_write_chapters(s);
1390 if (ret < 0)
1391 return ret;
1392
1393 ret = mkv_write_tags(s);
1394 if (ret < 0)
1395 return ret;
1396
1397 ret = mkv_write_attachments(s);
1398 if (ret < 0)
1399 return ret;
1400 }
1401
1402 if (!s->pb->seekable)
1403 mkv_write_seekhead(pb, mkv->main_seekhead);
1404
1405 mkv->cues = mkv_start_cues(mkv->segment_offset);
1406 if (!mkv->cues)
1407 return AVERROR(ENOMEM);
1408
1409 if (pb->seekable && mkv->reserve_cues_space) {
1410 mkv->cues_pos = avio_tell(pb);
1411 put_ebml_void(pb, mkv->reserve_cues_space);
1412 }
1413
1414 av_init_packet(&mkv->cur_audio_pkt);
1415 mkv->cur_audio_pkt.size = 0;
1416 mkv->cluster_pos = -1;
1417
1418 avio_flush(pb);
1419
1420 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1421 // after 4k and on a keyframe
1422 if (pb->seekable) {
1423 if (mkv->cluster_time_limit < 0)
1424 mkv->cluster_time_limit = 5000;
1425 if (mkv->cluster_size_limit < 0)
1426 mkv->cluster_size_limit = 5 * 1024 * 1024;
1427 } else {
1428 if (mkv->cluster_time_limit < 0)
1429 mkv->cluster_time_limit = 1000;
1430 if (mkv->cluster_size_limit < 0)
1431 mkv->cluster_size_limit = 32 * 1024;
1432 }
1433
1434 return 0;
1435}
1436
1437static int mkv_blockgroup_size(int pkt_size)
1438{
1439 int size = pkt_size + 4;
1440 size += ebml_num_size(size);
1441 size += 2; // EBML ID for block and block duration
1442 size += 8; // max size of block duration
1443 size += ebml_num_size(size);
1444 size += 1; // blockgroup EBML ID
1445 return size;
1446}
1447
1448static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1449{
1450 uint8_t *dst;
1451 int srclen = *size;
1452 int offset = 0;
1453 int ret;
1454
1455 dst = av_malloc(srclen);
1456 if (!dst)
1457 return AVERROR(ENOMEM);
1458
1459 while (srclen >= WV_HEADER_SIZE) {
1460 WvHeader header;
1461
1462 ret = ff_wv_parse_header(&header, src);
1463 if (ret < 0)
1464 goto fail;
1465 src += WV_HEADER_SIZE;
1466 srclen -= WV_HEADER_SIZE;
1467
1468 if (srclen < header.blocksize) {
1469 ret = AVERROR_INVALIDDATA;
1470 goto fail;
1471 }
1472
1473 if (header.initial) {
1474 AV_WL32(dst + offset, header.samples);
1475 offset += 4;
1476 }
1477 AV_WL32(dst + offset, header.flags);
1478 AV_WL32(dst + offset + 4, header.crc);
1479 offset += 8;
1480
1481 if (!(header.initial && header.final)) {
1482 AV_WL32(dst + offset, header.blocksize);
1483 offset += 4;
1484 }
1485
1486 memcpy(dst + offset, src, header.blocksize);
1487 src += header.blocksize;
1488 srclen -= header.blocksize;
1489 offset += header.blocksize;
1490 }
1491
1492 *pdst = dst;
1493 *size = offset;
1494
1495 return 0;
1496fail:
1497 av_freep(&dst);
1498 return ret;
1499}
1500
1501static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1502 unsigned int blockid, AVPacket *pkt, int flags)
1503{
1504 MatroskaMuxContext *mkv = s->priv_data;
1505 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1506 uint8_t *data = NULL, *side_data = NULL;
1507 int offset = 0, size = pkt->size, side_data_size = 0;
1508 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1509 uint64_t additional_id = 0;
1510 int64_t discard_padding = 0;
1511 ebml_master block_group, block_additions, block_more;
1512
1513 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1514 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1515 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1516 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1517 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1518 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1519 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1520 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1521 /* extradata is Annex B, assume the bitstream is too and convert it */
1522 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1523 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1524 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1525 if (ret < 0) {
1526 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1527 return;
1528 }
1529 } else
1530 data = pkt->data;
1531
1532 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1533 /* Matroska specification requires to remove the first QuickTime atom
1534 */
1535 size -= 8;
1536 offset = 8;
1537 }
1538
1539 side_data = av_packet_get_side_data(pkt,
1540 AV_PKT_DATA_SKIP_SAMPLES,
1541 &side_data_size);
1542
1543 if (side_data && side_data_size >= 10) {
1544 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1545 (AVRational){1, codec->sample_rate},
1546 (AVRational){1, 1000000000});
1547 }
1548
1549 side_data = av_packet_get_side_data(pkt,
1550 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1551 &side_data_size);
1552 if (side_data) {
1553 additional_id = AV_RB64(side_data);
1554 side_data += 8;
1555 side_data_size -= 8;
1556 }
1557
1558 if ((side_data_size && additional_id == 1) || discard_padding) {
1559 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1560 blockid = MATROSKA_ID_BLOCK;
1561 }
1562
1563 put_ebml_id(pb, blockid);
1564 put_ebml_num(pb, size + 4, 0);
1565 // this assumes stream_index is less than 126
1566 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1567 avio_wb16(pb, ts - mkv->cluster_pts);
1568 avio_w8(pb, flags);
1569 avio_write(pb, data + offset, size);
1570 if (data != pkt->data)
1571 av_free(data);
1572
1573 if (discard_padding) {
1574 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1575 }
1576
1577 if (side_data_size && additional_id == 1) {
1578 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1579 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1580 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1581 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1582 put_ebml_num(pb, side_data_size, 0);
1583 avio_write(pb, side_data, side_data_size);
1584 end_ebml_master(pb, block_more);
1585 end_ebml_master(pb, block_additions);
1586 }
1587 if ((side_data_size && additional_id == 1) || discard_padding) {
1588 end_ebml_master(pb, block_group);
1589 }
1590}
1591
1592static int srt_get_duration(uint8_t **buf)
1593{
1594 int i, duration = 0;
1595
1596 for (i = 0; i < 2 && !duration; i++) {
1597 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
1598 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
1599 &s_hour, &s_min, &s_sec, &s_hsec,
1600 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
1601 s_min += 60 * s_hour;
1602 e_min += 60 * e_hour;
1603 s_sec += 60 * s_min;
1604
1605 e_sec += 60 * e_min;
1606 s_hsec += 1000 * s_sec;
1607 e_hsec += 1000 * e_sec;
1608
1609 duration = e_hsec - s_hsec;
1610 }
1611 *buf += ff_subtitles_next_line(*buf);
1612 }
1613 return duration;
1614}
1615
1616static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb,
1617 AVPacket *pkt)
1618{
1619 ebml_master blockgroup;
1620 AVPacket pkt2 = *pkt;
1621 int64_t duration = srt_get_duration(&pkt2.data);
1622 pkt2.size -= pkt2.data - pkt->data;
1623
1624 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1625 mkv_blockgroup_size(pkt2.size));
1626 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
1627 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1628 end_ebml_master(pb, blockgroup);
1629
1630 return duration;
1631}
1632
1633static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1634{
1635 MatroskaMuxContext *mkv = s->priv_data;
1636 ebml_master blockgroup;
1637 int id_size, settings_size, size;
1638 uint8_t *id, *settings;
1639 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1640 const int flags = 0;
1641
1642 id_size = 0;
1643 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1644 &id_size);
1645
1646 settings_size = 0;
1647 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1648 &settings_size);
1649
1650 size = id_size + 1 + settings_size + 1 + pkt->size;
1651
1652 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1653 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1654 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1655
1656 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1657
1658 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1659 put_ebml_num(pb, size + 4, 0);
1660 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1661 avio_wb16(pb, ts - mkv->cluster_pts);
1662 avio_w8(pb, flags);
1663 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1664
1665 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1666 end_ebml_master(pb, blockgroup);
1667
1668 return pkt->duration;
1669}
1670
1671static void mkv_flush_dynbuf(AVFormatContext *s)
1672{
1673 MatroskaMuxContext *mkv = s->priv_data;
1674 int bufsize;
1675 uint8_t *dyn_buf;
1676
1677 if (!mkv->dyn_bc)
1678 return;
1679
1680 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1681 avio_write(s->pb, dyn_buf, bufsize);
1682 av_free(dyn_buf);
1683 mkv->dyn_bc = NULL;
1684}
1685
1686static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1687{
1688 MatroskaMuxContext *mkv = s->priv_data;
1689 AVIOContext *pb;
1690
1691 if (s->pb->seekable) {
1692 pb = s->pb;
1693 } else {
1694 pb = mkv->dyn_bc;
1695 }
1696
1697 av_log(s, AV_LOG_DEBUG,
1698 "Starting new cluster at offset %" PRIu64 " bytes, "
1699 "pts %" PRIu64 "dts %" PRIu64 "\n",
1700 avio_tell(pb), pkt->pts, pkt->dts);
1701 end_ebml_master(pb, mkv->cluster);
1702 mkv->cluster_pos = -1;
1703 if (mkv->dyn_bc)
1704 mkv_flush_dynbuf(s);
1705 avio_flush(s->pb);
1706}
1707
1708static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1709{
1710 MatroskaMuxContext *mkv = s->priv_data;
1711 AVIOContext *pb = s->pb;
1712 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1713 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1714 int duration = pkt->duration;
1715 int ret;
1716 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1717 int64_t relative_packet_pos;
1718 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1719
1720 if (ts == AV_NOPTS_VALUE) {
1721 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1722 return AVERROR(EINVAL);
1723 }
1724 ts += mkv->tracks[pkt->stream_index].ts_offset;
1725
1726 if (mkv->cluster_pos != -1) {
1727 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1728 if ((int16_t)cluster_time != cluster_time) {
1729 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1730 mkv_start_new_cluster(s, pkt);
1731 }
1732 }
1733
1734 if (!s->pb->seekable) {
1735 if (!mkv->dyn_bc) {
1736 if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) {
1737 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1738 return ret;
1739 }
1740 }
1741 pb = mkv->dyn_bc;
1742 }
1743
1744 if (mkv->cluster_pos == -1) {
1745 mkv->cluster_pos = avio_tell(s->pb);
1746 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1747 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1748 mkv->cluster_pts = FFMAX(0, ts);
1749 }
1750
1751 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1752
1753 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1754 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1755 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1756 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1757 if (ret < 0) return ret;
1758 }
1759 } else {
1760 if (codec->codec_id == AV_CODEC_ID_SRT) {
1761 duration = mkv_write_srt_blocks(s, pb, pkt);
1762 } else if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
1763 duration = mkv_write_vtt_blocks(s, pb, pkt);
1764 } else {
1765 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1766 mkv_blockgroup_size(pkt->size));
1767 /* For backward compatibility, prefer convergence_duration. */
1768 if (pkt->convergence_duration > 0) {
1769 duration = pkt->convergence_duration;
1770 }
1771 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1772 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1773 end_ebml_master(pb, blockgroup);
1774 }
1775
1776 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1777 mkv->cluster_pos, relative_packet_pos, duration);
1778 if (ret < 0)
1779 return ret;
1780 }
1781
1782 mkv->duration = FFMAX(mkv->duration, ts + duration);
1783 return 0;
1784}
1785
1786static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1787{
1788 MatroskaMuxContext *mkv = s->priv_data;
1789 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1790 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1791 int cluster_size;
1792 int64_t cluster_time;
1793 int ret;
1794 int start_new_cluster;
1795
1796 if (mkv->tracks[pkt->stream_index].write_dts)
1797 cluster_time = pkt->dts - mkv->cluster_pts;
1798 else
1799 cluster_time = pkt->pts - mkv->cluster_pts;
1800 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1801
1802 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1803 // after 4k and on a keyframe
1804 if (s->pb->seekable) {
1805 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1806 } else {
1807 cluster_size = avio_tell(mkv->dyn_bc);
1808 }
1809
1810 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1811 // WebM DASH specification states that the first block of every cluster
1812 // has to be a key frame. So for DASH video, we only create a cluster
1813 // on seeing key frames.
1814 start_new_cluster = keyframe;
1815 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
1816 cluster_time > mkv->cluster_time_limit) {
1817 // For DASH audio, we create a Cluster based on cluster_time_limit
1818 start_new_cluster = 1;
1819 } else if (!mkv->is_dash &&
1820 (cluster_size > mkv->cluster_size_limit ||
1821 cluster_time > mkv->cluster_time_limit ||
1822 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1823 cluster_size > 4 * 1024))) {
1824 start_new_cluster = 1;
1825 } else {
1826 start_new_cluster = 0;
1827 }
1828
1829 if (mkv->cluster_pos != -1 && start_new_cluster) {
1830 mkv_start_new_cluster(s, pkt);
1831 }
1832
1833 // check if we have an audio packet cached
1834 if (mkv->cur_audio_pkt.size > 0) {
1835 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1836 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1837 mkv->is_dash ? start_new_cluster : 0);
1838 av_free_packet(&mkv->cur_audio_pkt);
1839 if (ret < 0) {
1840 av_log(s, AV_LOG_ERROR,
1841 "Could not write cached audio packet ret:%d\n", ret);
1842 return ret;
1843 }
1844 }
1845
1846 // buffer an audio packet to ensure the packet containing the video
1847 // keyframe's timecode is contained in the same cluster for WebM
1848 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1849 mkv->cur_audio_pkt = *pkt;
1850 if (pkt->buf) {
1851 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1852 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1853 } else
1854 ret = av_dup_packet(&mkv->cur_audio_pkt);
1855 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1856 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1857 }
1858 } else
1859 ret = mkv_write_packet_internal(s, pkt, 0);
1860 return ret;
1861}
1862
1863static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1864{
1865 MatroskaMuxContext *mkv = s->priv_data;
1866 AVIOContext *pb;
1867 if (s->pb->seekable)
1868 pb = s->pb;
1869 else
1870 pb = mkv->dyn_bc;
1871 if (!pkt) {
1872 if (mkv->cluster_pos != -1) {
1873 av_log(s, AV_LOG_DEBUG,
1874 "Flushing cluster at offset %" PRIu64 " bytes\n",
1875 avio_tell(pb));
1876 end_ebml_master(pb, mkv->cluster);
1877 mkv->cluster_pos = -1;
1878 if (mkv->dyn_bc)
1879 mkv_flush_dynbuf(s);
1880 avio_flush(s->pb);
1881 }
1882 return 0;
1883 }
1884 return mkv_write_packet(s, pkt);
1885}
1886
1887static int mkv_write_trailer(AVFormatContext *s)
1888{
1889 MatroskaMuxContext *mkv = s->priv_data;
1890 AVIOContext *pb = s->pb;
1891 int64_t currentpos, cuespos;
1892 int ret;
1893
1894 // check if we have an audio packet cached
1895 if (mkv->cur_audio_pkt.size > 0) {
1896 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1897 av_free_packet(&mkv->cur_audio_pkt);
1898 if (ret < 0) {
1899 av_log(s, AV_LOG_ERROR,
1900 "Could not write cached audio packet ret:%d\n", ret);
1901 return ret;
1902 }
1903 }
1904
1905 if (mkv->dyn_bc) {
1906 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1907 mkv_flush_dynbuf(s);
1908 } else if (mkv->cluster_pos != -1) {
1909 end_ebml_master(pb, mkv->cluster);
1910 }
1911
1912 if (mkv->mode != MODE_WEBM) {
1913 ret = mkv_write_chapters(s);
1914 if (ret < 0)
1915 return ret;
1916 }
1917
1918 if (pb->seekable) {
1919 if (mkv->cues->num_entries) {
1920 if (mkv->reserve_cues_space) {
1921 int64_t cues_end;
1922
1923 currentpos = avio_tell(pb);
1924 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1925
1926 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1927 cues_end = avio_tell(pb);
1928 if (cues_end > cuespos + mkv->reserve_cues_space) {
1929 av_log(s, AV_LOG_ERROR,
1930 "Insufficient space reserved for cues: %d "
1931 "(needed: %" PRId64 ").\n",
1932 mkv->reserve_cues_space, cues_end - cuespos);
1933 return AVERROR(EINVAL);
1934 }
1935
1936 if (cues_end < cuespos + mkv->reserve_cues_space)
1937 put_ebml_void(pb, mkv->reserve_cues_space -
1938 (cues_end - cuespos));
1939
1940 avio_seek(pb, currentpos, SEEK_SET);
1941 } else {
1942 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1943 }
1944
1945 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1946 cuespos);
1947 if (ret < 0)
1948 return ret;
1949 }
1950
1951 mkv_write_seekhead(pb, mkv->main_seekhead);
1952
1953 // update the duration
1954 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1955 currentpos = avio_tell(pb);
1956 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1957 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1958
1959 avio_seek(pb, currentpos, SEEK_SET);
1960 }
1961
1962 end_ebml_master(pb, mkv->segment);
1963 av_freep(&mkv->tracks);
1964 av_freep(&mkv->cues->entries);
1965 av_freep(&mkv->cues);
1966
1967 return 0;
1968}
1969
1970static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1971{
1972 int i;
1973 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1974 if (ff_mkv_codec_tags[i].id == codec_id)
1975 return 1;
1976
1977 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1978 enum AVMediaType type = avcodec_get_type(codec_id);
1979 // mkv theoretically supports any video/audio through VFW/ACM
1980 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1981 return 1;
1982 }
1983
1984 return 0;
1985}
1986
1987static const AVCodecTag additional_audio_tags[] = {
1988 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1989 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1990 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1991 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1992 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1993 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1994 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1995 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1996 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1997 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1998 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1999 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
2000 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2001};
2002
2003static const AVCodecTag additional_video_tags[] = {
2004 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
2005 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
2006 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
2007 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
2008 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
2009 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
2010};
2011
2012#define OFFSET(x) offsetof(MatroskaMuxContext, x)
2013#define FLAGS AV_OPT_FLAG_ENCODING_PARAM
2014static const AVOption options[] = {
2015 { "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 },
2016 { "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 },
2017 { "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 },
2018 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
2019 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
2020 { NULL },
2021};
2022
2023#if CONFIG_MATROSKA_MUXER
2024static const AVClass matroska_class = {
2025 .class_name = "matroska muxer",
2026 .item_name = av_default_item_name,
2027 .option = options,
2028 .version = LIBAVUTIL_VERSION_INT,
2029};
2030
2031AVOutputFormat ff_matroska_muxer = {
2032 .name = "matroska",
2033 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
2034 .mime_type = "video/x-matroska",
2035 .extensions = "mkv",
2036 .priv_data_size = sizeof(MatroskaMuxContext),
2037 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2038 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2039 .video_codec = CONFIG_LIBX264_ENCODER ?
2040 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2041 .write_header = mkv_write_header,
2042 .write_packet = mkv_write_flush_packet,
2043 .write_trailer = mkv_write_trailer,
2044 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2045 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2046 .codec_tag = (const AVCodecTag* const []){
2047 ff_codec_bmp_tags, ff_codec_wav_tags,
2048 additional_audio_tags, additional_video_tags, 0
2049 },
2050 .subtitle_codec = AV_CODEC_ID_ASS,
2051 .query_codec = mkv_query_codec,
2052 .priv_class = &matroska_class,
2053};
2054#endif
2055
2056#if CONFIG_WEBM_MUXER
2057static const AVClass webm_class = {
2058 .class_name = "webm muxer",
2059 .item_name = av_default_item_name,
2060 .option = options,
2061 .version = LIBAVUTIL_VERSION_INT,
2062};
2063
2064AVOutputFormat ff_webm_muxer = {
2065 .name = "webm",
2066 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2067 .mime_type = "video/webm",
2068 .extensions = "webm",
2069 .priv_data_size = sizeof(MatroskaMuxContext),
2070 .audio_codec = AV_CODEC_ID_VORBIS,
2071 .video_codec = AV_CODEC_ID_VP8,
2072 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2073 .write_header = mkv_write_header,
2074 .write_packet = mkv_write_flush_packet,
2075 .write_trailer = mkv_write_trailer,
2076 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2077 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2078 .priv_class = &webm_class,
2079};
2080#endif
2081
2082#if CONFIG_MATROSKA_AUDIO_MUXER
2083static const AVClass mka_class = {
2084 .class_name = "matroska audio muxer",
2085 .item_name = av_default_item_name,
2086 .option = options,
2087 .version = LIBAVUTIL_VERSION_INT,
2088};
2089AVOutputFormat ff_matroska_audio_muxer = {
2090 .name = "matroska",
2091 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2092 .mime_type = "audio/x-matroska",
2093 .extensions = "mka",
2094 .priv_data_size = sizeof(MatroskaMuxContext),
2095 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2096 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2097 .video_codec = AV_CODEC_ID_NONE,
2098 .write_header = mkv_write_header,
2099 .write_packet = mkv_write_flush_packet,
2100 .write_trailer = mkv_write_trailer,
2101 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2102 AVFMT_ALLOW_FLUSH,
2103 .codec_tag = (const AVCodecTag* const []){
2104 ff_codec_wav_tags, additional_audio_tags, 0
2105 },
2106 .priv_class = &mka_class,
2107};
2108#endif
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