repositories / deb_ffmpeg.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Imported Debian version 2.5.0~trusty1.1
[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,
f6fa7814 699 AVStream *st, int mode, int *h_width, int *h_height)
2ba45a60
DM		 700{
701 int i;
702 int ret = 0;
703 AVDictionaryEntry *tag;
704 MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
705
f6fa7814
DM		 706 *h_width = 1;
707 *h_height = 1;
2ba45a60
DM		 708 // convert metadata into proper side data and add it to the stream
709 if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) ||
710 (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) {
711 int stereo_mode = atoi(tag->value);
712
713 for (i=0; i<MATROSKA_VIDEO_STEREOMODE_TYPE_NB; i++)
714 if (!strcmp(tag->value, ff_matroska_video_stereo_mode[i])){
715 stereo_mode = i;
716 break;
717 }
718
719 if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB &&
720 stereo_mode != 10 && stereo_mode != 12) {
721 int ret = ff_mkv_stereo3d_conv(st, stereo_mode);
722 if (ret < 0)
723 return ret;
724 }
725 }
726
f6fa7814 727 // iterate to find the stereo3d side data
2ba45a60
DM		 728 for (i = 0; i < st->nb_side_data; i++) {
729 AVPacketSideData sd = st->side_data[i];
730 if (sd.type == AV_PKT_DATA_STEREO3D) {
731 AVStereo3D *stereo = (AVStereo3D *)sd.data;
732
733 switch (stereo->type) {
734 case AV_STEREO3D_2D:
735 format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO;
736 break;
737 case AV_STEREO3D_SIDEBYSIDE:
738 format = (stereo->flags & AV_STEREO3D_FLAG_INVERT)
739 ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT
740 : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT;
f6fa7814 741 *h_width = 2;
2ba45a60
DM		 742 break;
743 case AV_STEREO3D_TOPBOTTOM:
744 format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM;
745 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
746 format--;
f6fa7814 747 *h_height = 2;
2ba45a60
DM		 748 break;
749 case AV_STEREO3D_CHECKERBOARD:
750 format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR;
751 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
752 format--;
753 break;
754 case AV_STEREO3D_LINES:
755 format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR;
756 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
757 format--;
f6fa7814 758 *h_height = 2;
2ba45a60
DM		 759 break;
760 case AV_STEREO3D_COLUMNS:
761 format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR;
762 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
763 format--;
f6fa7814 764 *h_width = 2;
2ba45a60
DM		 765 break;
766 case AV_STEREO3D_FRAMESEQUENCE:
767 format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR;
768 if (stereo->flags & AV_STEREO3D_FLAG_INVERT)
769 format++;
770 break;
771 }
2ba45a60
DM		 772 break;
773 }
774 }
775
776 if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB)
777 return ret;
778
f6fa7814 779 // if webm, do not write unsupported modes
2ba45a60
DM		 780 if ((mode == MODE_WEBM &&
781 format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM &&
782 format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
783 || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) {
784 av_log(s, AV_LOG_ERROR,
785 "The specified stereo mode is not valid.\n");
786 format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB;
787 return AVERROR(EINVAL);
788 }
789
f6fa7814 790 // write StereoMode if format is valid
2ba45a60
DM		 791 put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format);
792
793 return ret;
794}
795
796static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv,
797 int i, AVIOContext *pb, int default_stream_exists)
798{
799 AVStream *st = s->streams[i];
800 AVCodecContext *codec = st->codec;
801 ebml_master subinfo, track;
802 int native_id = 0;
803 int qt_id = 0;
804 int bit_depth = av_get_bits_per_sample(codec->codec_id);
805 int sample_rate = codec->sample_rate;
806 int output_sample_rate = 0;
807 int display_width_div = 1;
808 int display_height_div = 1;
809 int j, ret;
810 AVDictionaryEntry *tag;
811
812 // ms precision is the de-facto standard timescale for mkv files
813 avpriv_set_pts_info(st, 64, 1, 1000);
814
815 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
816 mkv->have_attachments = 1;
817 return 0;
818 }
819
820 if (!bit_depth && codec->codec_id != AV_CODEC_ID_ADPCM_G726)
821 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
822 if (!bit_depth)
823 bit_depth = codec->bits_per_coded_sample;
824
825 if (codec->codec_id == AV_CODEC_ID_AAC)
826 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
827
828 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
829 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER,
830 mkv->is_dash ? mkv->dash_track_number : i + 1);
831 put_ebml_uint (pb, MATROSKA_ID_TRACKUID,
832 mkv->is_dash ? mkv->dash_track_number : i + 1);
833 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet)
834
835 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
836 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
837 tag = av_dict_get(st->metadata, "language", NULL, 0);
838 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
839 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und");
840 } else if (tag && tag->value) {
841 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value);
842 }
843
844 // The default value for TRACKFLAGDEFAULT is 1, so add element
845 // if we need to clear it.
846 if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT))
847 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
848
849 if (st->disposition & AV_DISPOSITION_FORCED)
850 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1);
851
852 if (mkv->mode == MODE_WEBM && codec->codec_id == AV_CODEC_ID_WEBVTT) {
853 const char *codec_id;
854 if (st->disposition & AV_DISPOSITION_CAPTIONS) {
855 codec_id = "D_WEBVTT/CAPTIONS";
856 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
857 } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) {
858 codec_id = "D_WEBVTT/DESCRIPTIONS";
859 native_id = MATROSKA_TRACK_TYPE_METADATA;
860 } else if (st->disposition & AV_DISPOSITION_METADATA) {
861 codec_id = "D_WEBVTT/METADATA";
862 native_id = MATROSKA_TRACK_TYPE_METADATA;
863 } else {
864 codec_id = "D_WEBVTT/SUBTITLES";
865 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
866 }
867 put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id);
868 } else {
869 // look for a codec ID string specific to mkv to use,
870 // if none are found, use AVI codes
871 for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) {
872 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
873 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
874 native_id = 1;
875 break;
876 }
877 }
878 }
879
f6fa7814
DM		 880 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding && codec->codec_id == AV_CODEC_ID_OPUS) {
881// mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
2ba45a60
DM		 882// (AVRational){ 1, codec->sample_rate },
883// st->time_base);
884
885 put_ebml_uint(pb, MATROSKA_ID_CODECDELAY,
f6fa7814
DM		 886 av_rescale_q(codec->initial_padding,
887 (AVRational){ 1, codec->sample_rate },
2ba45a60
DM		 888 (AVRational){ 1, 1000000000 }));
889 }
890 if (codec->codec_id == AV_CODEC_ID_OPUS) {
891 put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL);
892 }
893
894 if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 ||
895 codec->codec_id == AV_CODEC_ID_VP9 ||
896 codec->codec_id == AV_CODEC_ID_OPUS ||
897 codec->codec_id == AV_CODEC_ID_VORBIS ||
898 codec->codec_id == AV_CODEC_ID_WEBVTT)) {
899 av_log(s, AV_LOG_ERROR,
900 "Only VP8 or VP9 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n");
901 return AVERROR(EINVAL);
902 }
903
904 switch (codec->codec_type) {
905 case AVMEDIA_TYPE_VIDEO:
906 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
907
908 if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0
909 && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base))
910 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9 / av_q2d(st->avg_frame_rate));
911 else
912 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
913
914 if (!native_id &&
915 ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) &&
916 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) ||
917 codec->codec_id == AV_CODEC_ID_SVQ1 ||
918 codec->codec_id == AV_CODEC_ID_SVQ3 ||
919 codec->codec_id == AV_CODEC_ID_CINEPAK))
920 qt_id = 1;
921
922 if (qt_id)
923 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
924 else if (!native_id) {
925 // if there is no mkv-specific codec ID, use VFW mode
926 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
927 mkv->tracks[i].write_dts = 1;
928 }
929
930 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
931 // XXX: interlace flag?
932 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
933 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
934
935 // check both side data and metadata for stereo information,
936 // write the result to the bitstream if any is found
f6fa7814
DM		 937 ret = mkv_write_stereo_mode(s, pb, st, mkv->mode,
938 &display_width_div,
939 &display_height_div);
2ba45a60
DM		 940 if (ret < 0)
941 return ret;
942
2ba45a60
DM		 943 if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
944 ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) ||
945 (codec->pix_fmt == AV_PIX_FMT_YUVA420P)) {
946 put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1);
947 }
948
f6fa7814
DM		 949 // write DisplayWidth and DisplayHeight, they contain the size of
950 // a single source view and/or the display aspect ratio
2ba45a60
DM		 951 if (st->sample_aspect_ratio.num) {
952 int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
953 if (d_width > INT_MAX) {
954 av_log(s, AV_LOG_ERROR, "Overflow in display width\n");
955 return AVERROR(EINVAL);
956 }
957 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div);
958 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
959 } else if (display_width_div != 1 || display_height_div != 1) {
960 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , codec->width / display_width_div);
961 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height / display_height_div);
962 }
963
964 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
965 uint32_t color_space = av_le2ne32(codec->codec_tag);
966 put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space));
967 }
f6fa7814 968
2ba45a60
DM		 969 end_ebml_master(pb, subinfo);
970 break;
971
972 case AVMEDIA_TYPE_AUDIO:
973 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
974
975 if (!native_id)
976 // no mkv-specific ID, use ACM mode
977 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
978
979 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
980 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
981 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
982 if (output_sample_rate)
983 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
984 if (bit_depth)
985 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
986 end_ebml_master(pb, subinfo);
987 break;
988
989 case AVMEDIA_TYPE_SUBTITLE:
990 if (!native_id) {
991 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
992 return AVERROR(ENOSYS);
993 }
994
995 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT)
996 native_id = MATROSKA_TRACK_TYPE_SUBTITLE;
997
998 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id);
999 break;
1000 default:
1001 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
1002 return AVERROR(EINVAL);
1003 }
1004
1005 if (mkv->mode != MODE_WEBM || codec->codec_id != AV_CODEC_ID_WEBVTT) {
1006 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
1007 if (ret < 0)
1008 return ret;
1009 }
1010
1011 end_ebml_master(pb, track);
1012
1013 return 0;
1014}
1015
1016static int mkv_write_tracks(AVFormatContext *s)
1017{
1018 MatroskaMuxContext *mkv = s->priv_data;
1019 AVIOContext *pb = s->pb;
1020 ebml_master tracks;
1021 int i, ret, default_stream_exists = 0;
1022
1023 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
1024 if (ret < 0)
1025 return ret;
1026
1027 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
1028 for (i = 0; i < s->nb_streams; i++) {
1029 AVStream *st = s->streams[i];
1030 default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT;
1031 }
1032 for (i = 0; i < s->nb_streams; i++) {
1033 ret = mkv_write_track(s, mkv, i, pb, default_stream_exists);
1034 if (ret < 0)
1035 return ret;
1036 }
1037 end_ebml_master(pb, tracks);
1038 return 0;
1039}
1040
1041static int mkv_write_chapters(AVFormatContext *s)
1042{
1043 MatroskaMuxContext *mkv = s->priv_data;
1044 AVIOContext *pb = s->pb;
1045 ebml_master chapters, editionentry;
1046 AVRational scale = {1, 1E9};
1047 int i, ret;
1048
1049 if (!s->nb_chapters || mkv->wrote_chapters)
1050 return 0;
1051
1052 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
1053 if (ret < 0) return ret;
1054
1055 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
1056 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
1057 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
1058 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
1059 for (i = 0; i < s->nb_chapters; i++) {
1060 ebml_master chapteratom, chapterdisplay;
1061 AVChapter *c = s->chapters[i];
1062 AVDictionaryEntry *t = NULL;
1063
1064 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
1065 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset);
1066 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
1067 av_rescale_q(c->start, c->time_base, scale));
1068 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
1069 av_rescale_q(c->end, c->time_base, scale));
1070 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
1071 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
1072 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
1073 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
1074 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
1075 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
1076 end_ebml_master(pb, chapterdisplay);
1077 }
1078 end_ebml_master(pb, chapteratom);
1079 }
1080 end_ebml_master(pb, editionentry);
1081 end_ebml_master(pb, chapters);
1082
1083 mkv->wrote_chapters = 1;
1084 return 0;
1085}
1086
1087static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
1088{
1089 uint8_t *key = av_strdup(t->key);
1090 uint8_t *p = key;
1091 const uint8_t *lang = NULL;
1092 ebml_master tag;
1093
1094 if ((p = strrchr(p, '-')) &&
1095 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
1096 *p = 0;
1097
1098 p = key;
1099 while (*p) {
1100 if (*p == ' ')
1101 *p = '_';
1102 else if (*p >= 'a' && *p <= 'z')
1103 *p -= 'a' - 'A';
1104 p++;
1105 }
1106
1107 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
1108 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
1109 if (lang)
1110 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
1111 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
1112 end_ebml_master(pb, tag);
1113
1114 av_freep(&key);
1115}
1116
1117static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
1118 unsigned int uid, ebml_master *tags)
1119{
1120 MatroskaMuxContext *mkv = s->priv_data;
1121 ebml_master tag, targets;
1122 AVDictionaryEntry *t = NULL;
1123 int ret;
1124
1125 if (!tags->pos) {
1126 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
1127 if (ret < 0) return ret;
1128
1129 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
1130 }
1131
1132 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
1133 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
1134 if (elementid)
1135 put_ebml_uint(s->pb, elementid, uid);
1136 end_ebml_master(s->pb, targets);
1137
1138 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1139 if (av_strcasecmp(t->key, "title") &&
1140 av_strcasecmp(t->key, "stereo_mode") &&
1141 av_strcasecmp(t->key, "encoding_tool"))
1142 mkv_write_simpletag(s->pb, t);
1143
1144 end_ebml_master(s->pb, tag);
1145 return 0;
1146}
1147
1148static int mkv_check_tag(AVDictionary *m)
1149{
1150 AVDictionaryEntry *t = NULL;
1151
1152 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
1153 if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode"))
1154 return 1;
1155
1156 return 0;
1157}
1158
1159static int mkv_write_tags(AVFormatContext *s)
1160{
1161 MatroskaMuxContext *mkv = s->priv_data;
1162 ebml_master tags = {0};
1163 int i, ret;
1164
1165 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
1166
1167 if (mkv_check_tag(s->metadata)) {
1168 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
1169 if (ret < 0) return ret;
1170 }
1171
1172 for (i = 0; i < s->nb_streams; i++) {
1173 AVStream *st = s->streams[i];
1174
1175 if (!mkv_check_tag(st->metadata))
1176 continue;
1177
1178 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
1179 if (ret < 0) return ret;
1180 }
1181
1182 for (i = 0; i < s->nb_chapters; i++) {
1183 AVChapter *ch = s->chapters[i];
1184
1185 if (!mkv_check_tag(ch->metadata))
1186 continue;
1187
1188 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &tags);
1189 if (ret < 0) return ret;
1190 }
1191
1192 if (tags.pos)
1193 end_ebml_master(s->pb, tags);
1194 return 0;
1195}
1196
1197static int mkv_write_attachments(AVFormatContext *s)
1198{
1199 MatroskaMuxContext *mkv = s->priv_data;
1200 AVIOContext *pb = s->pb;
1201 ebml_master attachments;
1202 AVLFG c;
1203 int i, ret;
1204
1205 if (!mkv->have_attachments)
1206 return 0;
1207
1208 av_lfg_init(&c, av_get_random_seed());
1209
1210 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
1211 if (ret < 0) return ret;
1212
1213 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
1214
1215 for (i = 0; i < s->nb_streams; i++) {
1216 AVStream *st = s->streams[i];
1217 ebml_master attached_file;
1218 AVDictionaryEntry *t;
1219 const char *mimetype = NULL;
1220 uint64_t fileuid;
1221
1222 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
1223 continue;
1224
1225 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
1226
1227 if (t = av_dict_get(st->metadata, "title", NULL, 0))
1228 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
1229 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
1230 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
1231 return AVERROR(EINVAL);
1232 }
1233 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
1234 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
1235 mimetype = t->value;
1236 else if (st->codec->codec_id != AV_CODEC_ID_NONE ) {
1237 int i;
1238 for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++)
1239 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
1240 mimetype = ff_mkv_mime_tags[i].str;
1241 break;
1242 }
1243 }
1244 if (!mimetype) {
1245 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
1246 "it cannot be deduced from the codec id.\n", i);
1247 return AVERROR(EINVAL);
1248 }
1249
1250 if (s->flags & AVFMT_FLAG_BITEXACT) {
1251 struct AVSHA *sha = av_sha_alloc();
1252 uint8_t digest[20];
1253 if (!sha)
1254 return AVERROR(ENOMEM);
1255 av_sha_init(sha, 160);
1256 av_sha_update(sha, st->codec->extradata, st->codec->extradata_size);
1257 av_sha_final(sha, digest);
1258 av_free(sha);
1259 fileuid = AV_RL64(digest);
1260 } else {
1261 fileuid = av_lfg_get(&c);
1262 }
1263 av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n",
1264 fileuid, i);
1265
1266 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
1267 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
1268 put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid);
1269 end_ebml_master(pb, attached_file);
1270 }
1271 end_ebml_master(pb, attachments);
1272
1273 return 0;
1274}
1275
1276static int mkv_write_header(AVFormatContext *s)
1277{
1278 MatroskaMuxContext *mkv = s->priv_data;
1279 AVIOContext *pb = s->pb;
1280 ebml_master ebml_header, segment_info;
1281 AVDictionaryEntry *tag;
1282 int ret, i, version = 2;
1283
1284 if (!strcmp(s->oformat->name, "webm"))
1285 mkv->mode = MODE_WEBM;
1286 else
1287 mkv->mode = MODE_MATROSKAv2;
1288
1289 if (s->avoid_negative_ts < 0)
1290 s->avoid_negative_ts = 1;
1291
1292 if (mkv->mode != MODE_WEBM ||
1293 av_dict_get(s->metadata, "stereo_mode", NULL, 0) ||
1294 av_dict_get(s->metadata, "alpha_mode", NULL, 0))
1295 version = 4;
1296
1297 for (i = 0; i < s->nb_streams; i++) {
1298 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 ||
1299 s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK ||
1300 s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 ||
1301 s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR ||
1302 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 ||
1303 s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) {
1304 av_log(s, AV_LOG_ERROR,
1305 "The Matroska muxer does not yet support muxing %s\n",
1306 avcodec_get_name(s->streams[i]->codec->codec_id));
1307 return AVERROR_PATCHWELCOME;
1308 }
1309 if (s->streams[i]->codec->codec_id == AV_CODEC_ID_OPUS ||
1310 av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) ||
1311 av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0))
1312 version = 4;
1313 }
1314
1315 mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks));
1316 if (!mkv->tracks)
1317 return AVERROR(ENOMEM);
1318
1319 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
1320 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
1321 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
1322 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
1323 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
1324 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
1325 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version);
1326 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
1327 end_ebml_master(pb, ebml_header);
1328
1329 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
1330 mkv->segment_offset = avio_tell(pb);
1331
1332 // we write 2 seek heads - one at the end of the file to point to each
1333 // cluster, and one at the beginning to point to all other level one
1334 // elements (including the seek head at the end of the file), which
1335 // isn't more than 10 elements if we only write one of each other
1336 // currently defined level 1 element
1337 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
1338 if (!mkv->main_seekhead)
1339 return AVERROR(ENOMEM);
1340
1341 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
1342 if (ret < 0) return ret;
1343
1344 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
1345 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
1346 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
1347 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
1348 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
1349 uint32_t segment_uid[4];
1350 AVLFG lfg;
1351
1352 av_lfg_init(&lfg, av_get_random_seed());
1353
1354 for (i = 0; i < 4; i++)
1355 segment_uid[i] = av_lfg_get(&lfg);
1356
1357 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT);
1358 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
1359 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
1360 else
1361 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
1362 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
1363 } else {
1364 const char *ident = "Lavf";
1365 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident);
1366 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident);
1367 }
1368
1369 if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
1370 // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds.
1371 int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000;
1372 uint8_t date_utc_buf[8];
1373 AV_WB64(date_utc_buf, date_utc);
1374 put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8);
1375 }
1376
1377 // reserve space for the duration
1378 mkv->duration = 0;
1379 mkv->duration_offset = avio_tell(pb);
1380 put_ebml_void(pb, 11); // assumes double-precision float to be written
1381 end_ebml_master(pb, segment_info);
1382
1383 ret = mkv_write_tracks(s);
1384 if (ret < 0)
1385 return ret;
1386
1387 for (i = 0; i < s->nb_chapters; i++)
1388 mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id);
1389
1390 if (mkv->mode != MODE_WEBM) {
1391 ret = mkv_write_chapters(s);
1392 if (ret < 0)
1393 return ret;
1394
1395 ret = mkv_write_tags(s);
1396 if (ret < 0)
1397 return ret;
1398
1399 ret = mkv_write_attachments(s);
1400 if (ret < 0)
1401 return ret;
1402 }
1403
1404 if (!s->pb->seekable)
1405 mkv_write_seekhead(pb, mkv->main_seekhead);
1406
1407 mkv->cues = mkv_start_cues(mkv->segment_offset);
1408 if (!mkv->cues)
1409 return AVERROR(ENOMEM);
1410
1411 if (pb->seekable && mkv->reserve_cues_space) {
1412 mkv->cues_pos = avio_tell(pb);
1413 put_ebml_void(pb, mkv->reserve_cues_space);
1414 }
1415
1416 av_init_packet(&mkv->cur_audio_pkt);
1417 mkv->cur_audio_pkt.size = 0;
1418 mkv->cluster_pos = -1;
1419
1420 avio_flush(pb);
1421
1422 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1423 // after 4k and on a keyframe
1424 if (pb->seekable) {
1425 if (mkv->cluster_time_limit < 0)
1426 mkv->cluster_time_limit = 5000;
1427 if (mkv->cluster_size_limit < 0)
1428 mkv->cluster_size_limit = 5 * 1024 * 1024;
1429 } else {
1430 if (mkv->cluster_time_limit < 0)
1431 mkv->cluster_time_limit = 1000;
1432 if (mkv->cluster_size_limit < 0)
1433 mkv->cluster_size_limit = 32 * 1024;
1434 }
1435
1436 return 0;
1437}
1438
1439static int mkv_blockgroup_size(int pkt_size)
1440{
1441 int size = pkt_size + 4;
1442 size += ebml_num_size(size);
1443 size += 2; // EBML ID for block and block duration
1444 size += 8; // max size of block duration
1445 size += ebml_num_size(size);
1446 size += 1; // blockgroup EBML ID
1447 return size;
1448}
1449
1450static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size)
1451{
1452 uint8_t *dst;
1453 int srclen = *size;
1454 int offset = 0;
1455 int ret;
1456
1457 dst = av_malloc(srclen);
1458 if (!dst)
1459 return AVERROR(ENOMEM);
1460
1461 while (srclen >= WV_HEADER_SIZE) {
1462 WvHeader header;
1463
1464 ret = ff_wv_parse_header(&header, src);
1465 if (ret < 0)
1466 goto fail;
1467 src += WV_HEADER_SIZE;
1468 srclen -= WV_HEADER_SIZE;
1469
1470 if (srclen < header.blocksize) {
1471 ret = AVERROR_INVALIDDATA;
1472 goto fail;
1473 }
1474
1475 if (header.initial) {
1476 AV_WL32(dst + offset, header.samples);
1477 offset += 4;
1478 }
1479 AV_WL32(dst + offset, header.flags);
1480 AV_WL32(dst + offset + 4, header.crc);
1481 offset += 8;
1482
1483 if (!(header.initial && header.final)) {
1484 AV_WL32(dst + offset, header.blocksize);
1485 offset += 4;
1486 }
1487
1488 memcpy(dst + offset, src, header.blocksize);
1489 src += header.blocksize;
1490 srclen -= header.blocksize;
1491 offset += header.blocksize;
1492 }
1493
1494 *pdst = dst;
1495 *size = offset;
1496
1497 return 0;
1498fail:
1499 av_freep(&dst);
1500 return ret;
1501}
1502
1503static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
1504 unsigned int blockid, AVPacket *pkt, int flags)
1505{
1506 MatroskaMuxContext *mkv = s->priv_data;
1507 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1508 uint8_t *data = NULL, *side_data = NULL;
1509 int offset = 0, size = pkt->size, side_data_size = 0;
1510 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1511 uint64_t additional_id = 0;
1512 int64_t discard_padding = 0;
1513 ebml_master block_group, block_additions, block_more;
1514
1515 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1516 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1517 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
1518 if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 &&
1519 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1520 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
1521 else if (codec->codec_id == AV_CODEC_ID_HEVC && codec->extradata_size > 6 &&
1522 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
1523 /* extradata is Annex B, assume the bitstream is too and convert it */
1524 ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL);
1525 else if (codec->codec_id == AV_CODEC_ID_WAVPACK) {
1526 int ret = mkv_strip_wavpack(pkt->data, &data, &size);
1527 if (ret < 0) {
1528 av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n");
1529 return;
1530 }
1531 } else
1532 data = pkt->data;
1533
1534 if (codec->codec_id == AV_CODEC_ID_PRORES) {
1535 /* Matroska specification requires to remove the first QuickTime atom
1536 */
1537 size -= 8;
1538 offset = 8;
1539 }
1540
1541 side_data = av_packet_get_side_data(pkt,
1542 AV_PKT_DATA_SKIP_SAMPLES,
1543 &side_data_size);
1544
1545 if (side_data && side_data_size >= 10) {
1546 discard_padding = av_rescale_q(AV_RL32(side_data + 4),
1547 (AVRational){1, codec->sample_rate},
1548 (AVRational){1, 1000000000});
1549 }
1550
1551 side_data = av_packet_get_side_data(pkt,
1552 AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
1553 &side_data_size);
1554 if (side_data) {
1555 additional_id = AV_RB64(side_data);
1556 side_data += 8;
1557 side_data_size -= 8;
1558 }
1559
1560 if ((side_data_size && additional_id == 1) || discard_padding) {
1561 block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0);
1562 blockid = MATROSKA_ID_BLOCK;
1563 }
1564
1565 put_ebml_id(pb, blockid);
1566 put_ebml_num(pb, size + 4, 0);
1567 // this assumes stream_index is less than 126
1568 avio_w8(pb, 0x80 | (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)));
1569 avio_wb16(pb, ts - mkv->cluster_pts);
1570 avio_w8(pb, flags);
1571 avio_write(pb, data + offset, size);
1572 if (data != pkt->data)
1573 av_free(data);
1574
1575 if (discard_padding) {
1576 put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding);
1577 }
1578
1579 if (side_data_size && additional_id == 1) {
1580 block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0);
1581 block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0);
1582 put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1);
1583 put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL);
1584 put_ebml_num(pb, side_data_size, 0);
1585 avio_write(pb, side_data, side_data_size);
1586 end_ebml_master(pb, block_more);
1587 end_ebml_master(pb, block_additions);
1588 }
1589 if ((side_data_size && additional_id == 1) || discard_padding) {
1590 end_ebml_master(pb, block_group);
1591 }
1592}
1593
2ba45a60
DM		 1594static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1595{
1596 MatroskaMuxContext *mkv = s->priv_data;
1597 ebml_master blockgroup;
1598 int id_size, settings_size, size;
1599 uint8_t *id, *settings;
1600 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1601 const int flags = 0;
1602
1603 id_size = 0;
1604 id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER,
1605 &id_size);
1606
1607 settings_size = 0;
1608 settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS,
1609 &settings_size);
1610
1611 size = id_size + 1 + settings_size + 1 + pkt->size;
1612
1613 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
1614 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
1615 avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags);
1616
1617 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
1618
1619 put_ebml_id(pb, MATROSKA_ID_BLOCK);
1620 put_ebml_num(pb, size + 4, 0);
1621 avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126
1622 avio_wb16(pb, ts - mkv->cluster_pts);
1623 avio_w8(pb, flags);
1624 avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data);
1625
1626 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration);
1627 end_ebml_master(pb, blockgroup);
1628
1629 return pkt->duration;
1630}
1631
1632static void mkv_flush_dynbuf(AVFormatContext *s)
1633{
1634 MatroskaMuxContext *mkv = s->priv_data;
1635 int bufsize;
1636 uint8_t *dyn_buf;
1637
1638 if (!mkv->dyn_bc)
1639 return;
1640
1641 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
1642 avio_write(s->pb, dyn_buf, bufsize);
1643 av_free(dyn_buf);
1644 mkv->dyn_bc = NULL;
1645}
1646
1647static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt)
1648{
1649 MatroskaMuxContext *mkv = s->priv_data;
1650 AVIOContext *pb;
1651
1652 if (s->pb->seekable) {
1653 pb = s->pb;
1654 } else {
1655 pb = mkv->dyn_bc;
1656 }
1657
1658 av_log(s, AV_LOG_DEBUG,
1659 "Starting new cluster at offset %" PRIu64 " bytes, "
1660 "pts %" PRIu64 "dts %" PRIu64 "\n",
1661 avio_tell(pb), pkt->pts, pkt->dts);
1662 end_ebml_master(pb, mkv->cluster);
1663 mkv->cluster_pos = -1;
1664 if (mkv->dyn_bc)
1665 mkv_flush_dynbuf(s);
1666 avio_flush(s->pb);
1667}
1668
1669static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
1670{
1671 MatroskaMuxContext *mkv = s->priv_data;
1672 AVIOContext *pb = s->pb;
1673 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
1674 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1675 int duration = pkt->duration;
1676 int ret;
1677 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
1678 int64_t relative_packet_pos;
1679 int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1;
1680
1681 if (ts == AV_NOPTS_VALUE) {
1682 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
1683 return AVERROR(EINVAL);
1684 }
1685 ts += mkv->tracks[pkt->stream_index].ts_offset;
1686
1687 if (mkv->cluster_pos != -1) {
1688 int64_t cluster_time = ts - mkv->cluster_pts + mkv->tracks[pkt->stream_index].ts_offset;
1689 if ((int16_t)cluster_time != cluster_time) {
1690 av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n");
1691 mkv_start_new_cluster(s, pkt);
1692 }
1693 }
1694
1695 if (!s->pb->seekable) {
1696 if (!mkv->dyn_bc) {
f6fa7814
DM		 1697 ret = avio_open_dyn_buf(&mkv->dyn_bc);
1698 if (ret < 0) {
2ba45a60
DM		 1699 av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n");
1700 return ret;
1701 }
1702 }
1703 pb = mkv->dyn_bc;
1704 }
1705
1706 if (mkv->cluster_pos == -1) {
1707 mkv->cluster_pos = avio_tell(s->pb);
1708 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
1709 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
1710 mkv->cluster_pts = FFMAX(0, ts);
1711 }
1712
1713 relative_packet_pos = avio_tell(s->pb) - mkv->cluster.pos;
1714
1715 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
1716 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
1717 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue) {
1718 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1);
1719 if (ret < 0) return ret;
1720 }
1721 } else {
f6fa7814 1722 if (codec->codec_id == AV_CODEC_ID_WEBVTT) {
2ba45a60
DM		 1723 duration = mkv_write_vtt_blocks(s, pb, pkt);
1724 } else {
1725 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
1726 mkv_blockgroup_size(pkt->size));
1727 /* For backward compatibility, prefer convergence_duration. */
1728 if (pkt->convergence_duration > 0) {
1729 duration = pkt->convergence_duration;
1730 }
1731 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
1732 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
1733 end_ebml_master(pb, blockgroup);
1734 }
1735
1736 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts,
1737 mkv->cluster_pos, relative_packet_pos, duration);
1738 if (ret < 0)
1739 return ret;
1740 }
1741
1742 mkv->duration = FFMAX(mkv->duration, ts + duration);
1743 return 0;
1744}
1745
1746static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
1747{
1748 MatroskaMuxContext *mkv = s->priv_data;
1749 int codec_type = s->streams[pkt->stream_index]->codec->codec_type;
1750 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
1751 int cluster_size;
1752 int64_t cluster_time;
1753 int ret;
1754 int start_new_cluster;
1755
1756 if (mkv->tracks[pkt->stream_index].write_dts)
1757 cluster_time = pkt->dts - mkv->cluster_pts;
1758 else
1759 cluster_time = pkt->pts - mkv->cluster_pts;
1760 cluster_time += mkv->tracks[pkt->stream_index].ts_offset;
1761
1762 // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
1763 // after 4k and on a keyframe
1764 if (s->pb->seekable) {
1765 cluster_size = avio_tell(s->pb) - mkv->cluster_pos;
1766 } else {
1767 cluster_size = avio_tell(mkv->dyn_bc);
1768 }
1769
1770 if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) {
1771 // WebM DASH specification states that the first block of every cluster
1772 // has to be a key frame. So for DASH video, we only create a cluster
1773 // on seeing key frames.
1774 start_new_cluster = keyframe;
1775 } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
f6fa7814
DM		 1776 (mkv->cluster_pos == -1 ||
1777 cluster_time > mkv->cluster_time_limit)) {
2ba45a60
DM		 1778 // For DASH audio, we create a Cluster based on cluster_time_limit
1779 start_new_cluster = 1;
1780 } else if (!mkv->is_dash &&
1781 (cluster_size > mkv->cluster_size_limit ||
1782 cluster_time > mkv->cluster_time_limit ||
1783 (codec_type == AVMEDIA_TYPE_VIDEO && keyframe &&
1784 cluster_size > 4 * 1024))) {
1785 start_new_cluster = 1;
1786 } else {
1787 start_new_cluster = 0;
1788 }
1789
1790 if (mkv->cluster_pos != -1 && start_new_cluster) {
1791 mkv_start_new_cluster(s, pkt);
1792 }
1793
1794 // check if we have an audio packet cached
1795 if (mkv->cur_audio_pkt.size > 0) {
1796 // for DASH audio, a CuePoint has to be added when there is a new cluster.
1797 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
1798 mkv->is_dash ? start_new_cluster : 0);
1799 av_free_packet(&mkv->cur_audio_pkt);
1800 if (ret < 0) {
1801 av_log(s, AV_LOG_ERROR,
1802 "Could not write cached audio packet ret:%d\n", ret);
1803 return ret;
1804 }
1805 }
1806
1807 // buffer an audio packet to ensure the packet containing the video
1808 // keyframe's timecode is contained in the same cluster for WebM
1809 if (codec_type == AVMEDIA_TYPE_AUDIO) {
1810 mkv->cur_audio_pkt = *pkt;
1811 if (pkt->buf) {
1812 mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
1813 ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
1814 } else
1815 ret = av_dup_packet(&mkv->cur_audio_pkt);
1816 if (mkv->cur_audio_pkt.side_data_elems > 0) {
1817 ret = av_copy_packet_side_data(&mkv->cur_audio_pkt, &mkv->cur_audio_pkt);
1818 }
1819 } else
1820 ret = mkv_write_packet_internal(s, pkt, 0);
1821 return ret;
1822}
1823
1824static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
1825{
1826 MatroskaMuxContext *mkv = s->priv_data;
1827 AVIOContext *pb;
1828 if (s->pb->seekable)
1829 pb = s->pb;
1830 else
1831 pb = mkv->dyn_bc;
1832 if (!pkt) {
1833 if (mkv->cluster_pos != -1) {
1834 av_log(s, AV_LOG_DEBUG,
1835 "Flushing cluster at offset %" PRIu64 " bytes\n",
1836 avio_tell(pb));
1837 end_ebml_master(pb, mkv->cluster);
1838 mkv->cluster_pos = -1;
1839 if (mkv->dyn_bc)
1840 mkv_flush_dynbuf(s);
1841 avio_flush(s->pb);
1842 }
1843 return 0;
1844 }
1845 return mkv_write_packet(s, pkt);
1846}
1847
1848static int mkv_write_trailer(AVFormatContext *s)
1849{
1850 MatroskaMuxContext *mkv = s->priv_data;
1851 AVIOContext *pb = s->pb;
1852 int64_t currentpos, cuespos;
1853 int ret;
1854
1855 // check if we have an audio packet cached
1856 if (mkv->cur_audio_pkt.size > 0) {
1857 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
1858 av_free_packet(&mkv->cur_audio_pkt);
1859 if (ret < 0) {
1860 av_log(s, AV_LOG_ERROR,
1861 "Could not write cached audio packet ret:%d\n", ret);
1862 return ret;
1863 }
1864 }
1865
1866 if (mkv->dyn_bc) {
1867 end_ebml_master(mkv->dyn_bc, mkv->cluster);
1868 mkv_flush_dynbuf(s);
1869 } else if (mkv->cluster_pos != -1) {
1870 end_ebml_master(pb, mkv->cluster);
1871 }
1872
1873 if (mkv->mode != MODE_WEBM) {
1874 ret = mkv_write_chapters(s);
1875 if (ret < 0)
1876 return ret;
1877 }
1878
1879 if (pb->seekable) {
1880 if (mkv->cues->num_entries) {
1881 if (mkv->reserve_cues_space) {
1882 int64_t cues_end;
1883
1884 currentpos = avio_tell(pb);
1885 avio_seek(pb, mkv->cues_pos, SEEK_SET);
1886
1887 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1888 cues_end = avio_tell(pb);
1889 if (cues_end > cuespos + mkv->reserve_cues_space) {
1890 av_log(s, AV_LOG_ERROR,
1891 "Insufficient space reserved for cues: %d "
1892 "(needed: %" PRId64 ").\n",
1893 mkv->reserve_cues_space, cues_end - cuespos);
1894 return AVERROR(EINVAL);
1895 }
1896
1897 if (cues_end < cuespos + mkv->reserve_cues_space)
1898 put_ebml_void(pb, mkv->reserve_cues_space -
1899 (cues_end - cuespos));
1900
1901 avio_seek(pb, currentpos, SEEK_SET);
1902 } else {
1903 cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams);
1904 }
1905
1906 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES,
1907 cuespos);
1908 if (ret < 0)
1909 return ret;
1910 }
1911
1912 mkv_write_seekhead(pb, mkv->main_seekhead);
1913
1914 // update the duration
1915 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
1916 currentpos = avio_tell(pb);
1917 avio_seek(pb, mkv->duration_offset, SEEK_SET);
1918 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
1919
1920 avio_seek(pb, currentpos, SEEK_SET);
1921 }
1922
1923 end_ebml_master(pb, mkv->segment);
1924 av_freep(&mkv->tracks);
1925 av_freep(&mkv->cues->entries);
1926 av_freep(&mkv->cues);
1927
1928 return 0;
1929}
1930
1931static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance)
1932{
1933 int i;
1934 for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++)
1935 if (ff_mkv_codec_tags[i].id == codec_id)
1936 return 1;
1937
1938 if (std_compliance < FF_COMPLIANCE_NORMAL) {
1939 enum AVMediaType type = avcodec_get_type(codec_id);
1940 // mkv theoretically supports any video/audio through VFW/ACM
1941 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
1942 return 1;
1943 }
1944
1945 return 0;
1946}
1947
1948static const AVCodecTag additional_audio_tags[] = {
1949 { AV_CODEC_ID_ALAC, 0XFFFFFFFF },
1950 { AV_CODEC_ID_EAC3, 0XFFFFFFFF },
1951 { AV_CODEC_ID_MLP, 0xFFFFFFFF },
1952 { AV_CODEC_ID_OPUS, 0xFFFFFFFF },
1953 { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF },
1954 { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF },
1955 { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF },
1956 { AV_CODEC_ID_QDM2, 0xFFFFFFFF },
1957 { AV_CODEC_ID_RA_144, 0xFFFFFFFF },
1958 { AV_CODEC_ID_RA_288, 0xFFFFFFFF },
1959 { AV_CODEC_ID_COOK, 0xFFFFFFFF },
1960 { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF },
1961 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1962};
1963
1964static const AVCodecTag additional_video_tags[] = {
1965 { AV_CODEC_ID_RV10, 0xFFFFFFFF },
1966 { AV_CODEC_ID_RV20, 0xFFFFFFFF },
1967 { AV_CODEC_ID_RV30, 0xFFFFFFFF },
1968 { AV_CODEC_ID_RV40, 0xFFFFFFFF },
1969 { AV_CODEC_ID_VP9, 0xFFFFFFFF },
1970 { AV_CODEC_ID_NONE, 0xFFFFFFFF }
1971};
1972
1973#define OFFSET(x) offsetof(MatroskaMuxContext, x)
1974#define FLAGS AV_OPT_FLAG_ENCODING_PARAM
1975static const AVOption options[] = {
1976 { "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 },
1977 { "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 },
1978 { "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 },
1979 { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
1980 { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS },
1981 { NULL },
1982};
1983
1984#if CONFIG_MATROSKA_MUXER
1985static const AVClass matroska_class = {
1986 .class_name = "matroska muxer",
1987 .item_name = av_default_item_name,
1988 .option = options,
1989 .version = LIBAVUTIL_VERSION_INT,
1990};
1991
1992AVOutputFormat ff_matroska_muxer = {
1993 .name = "matroska",
1994 .long_name = NULL_IF_CONFIG_SMALL("Matroska"),
1995 .mime_type = "video/x-matroska",
1996 .extensions = "mkv",
1997 .priv_data_size = sizeof(MatroskaMuxContext),
1998 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
1999 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2000 .video_codec = CONFIG_LIBX264_ENCODER ?
2001 AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4,
2002 .write_header = mkv_write_header,
2003 .write_packet = mkv_write_flush_packet,
2004 .write_trailer = mkv_write_trailer,
2005 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2006 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2007 .codec_tag = (const AVCodecTag* const []){
2008 ff_codec_bmp_tags, ff_codec_wav_tags,
2009 additional_audio_tags, additional_video_tags, 0
2010 },
2011 .subtitle_codec = AV_CODEC_ID_ASS,
2012 .query_codec = mkv_query_codec,
2013 .priv_class = &matroska_class,
2014};
2015#endif
2016
2017#if CONFIG_WEBM_MUXER
2018static const AVClass webm_class = {
2019 .class_name = "webm muxer",
2020 .item_name = av_default_item_name,
2021 .option = options,
2022 .version = LIBAVUTIL_VERSION_INT,
2023};
2024
2025AVOutputFormat ff_webm_muxer = {
2026 .name = "webm",
2027 .long_name = NULL_IF_CONFIG_SMALL("WebM"),
2028 .mime_type = "video/webm",
2029 .extensions = "webm",
2030 .priv_data_size = sizeof(MatroskaMuxContext),
2031 .audio_codec = AV_CODEC_ID_VORBIS,
2032 .video_codec = AV_CODEC_ID_VP8,
2033 .subtitle_codec = AV_CODEC_ID_WEBVTT,
2034 .write_header = mkv_write_header,
2035 .write_packet = mkv_write_flush_packet,
2036 .write_trailer = mkv_write_trailer,
2037 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS |
2038 AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
2039 .priv_class = &webm_class,
2040};
2041#endif
2042
2043#if CONFIG_MATROSKA_AUDIO_MUXER
2044static const AVClass mka_class = {
2045 .class_name = "matroska audio muxer",
2046 .item_name = av_default_item_name,
2047 .option = options,
2048 .version = LIBAVUTIL_VERSION_INT,
2049};
2050AVOutputFormat ff_matroska_audio_muxer = {
2051 .name = "matroska",
2052 .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"),
2053 .mime_type = "audio/x-matroska",
2054 .extensions = "mka",
2055 .priv_data_size = sizeof(MatroskaMuxContext),
2056 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
2057 AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3,
2058 .video_codec = AV_CODEC_ID_NONE,
2059 .write_header = mkv_write_header,
2060 .write_packet = mkv_write_flush_packet,
2061 .write_trailer = mkv_write_trailer,
2062 .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT |
2063 AVFMT_ALLOW_FLUSH,
2064 .codec_tag = (const AVCodecTag* const []){
2065 ff_codec_wav_tags, additional_audio_tags, 0
2066 },
2067 .priv_class = &mka_class,
2068};
2069#endif
ffmpeg Piment Noir Debian package repository