Statistics
| Branch: | Revision:

ffmpeg / libavformat / matroskaenc.c @ 690b4126

History | View | Annotate | Download (33.1 KB)

1 67143c0f David Conrad
/*
2 8cf3bb26 David Conrad
 * Matroska muxer
3 67143c0f David Conrad
 * 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 "avformat.h"
23
#include "riff.h"
24 f009e36f Aurelien Jacobs
#include "isom.h"
25 67143c0f David Conrad
#include "matroska.h"
26 aacc5f22 Aurelien Jacobs
#include "avc.h"
27 2578326f Justin Ruggles
#include "flacenc.h"
28 6a5d31ac Diego Biurrun
#include "libavutil/intreadwrite.h"
29 245976da Diego Biurrun
#include "libavutil/md5.h"
30
#include "libavcodec/xiph.h"
31 7bfacd4e Aurelien Jacobs
#include "libavcodec/mpeg4audio.h"
32 67143c0f David Conrad
33 baf71dca David Conrad
typedef struct ebml_master {
34 bc5c918e Diego Biurrun
    int64_t         pos;                ///< absolute offset in the file where the master's elements start
35 baf71dca David Conrad
    int             sizebytes;          ///< how many bytes were reserved for the size
36
} ebml_master;
37
38 967d815a David Conrad
typedef struct mkv_seekhead_entry {
39
    unsigned int    elementid;
40
    uint64_t        segmentpos;
41
} mkv_seekhead_entry;
42
43
typedef struct mkv_seekhead {
44 bc5c918e Diego Biurrun
    int64_t                 filepos;
45
    int64_t                 segment_offset;     ///< the file offset to the beginning of the segment
46 1b66d314 David Conrad
    int                     reserved_size;      ///< -1 if appending to file
47 967d815a David Conrad
    int                     max_entries;
48
    mkv_seekhead_entry      *entries;
49
    int                     num_entries;
50
} mkv_seekhead;
51
52 6364d534 David Conrad
typedef struct {
53
    uint64_t        pts;
54
    int             tracknum;
55 bc5c918e Diego Biurrun
    int64_t         cluster_pos;        ///< file offset of the cluster containing the block
56 6364d534 David Conrad
} mkv_cuepoint;
57
58
typedef struct {
59 bc5c918e Diego Biurrun
    int64_t         segment_offset;
60 6364d534 David Conrad
    mkv_cuepoint    *entries;
61
    int             num_entries;
62
} mkv_cues;
63
64 67143c0f David Conrad
typedef struct MatroskaMuxContext {
65 baf71dca David Conrad
    ebml_master     segment;
66 bc5c918e Diego Biurrun
    int64_t         segment_offset;
67
    int64_t         segment_uid;
68 baf71dca David Conrad
    ebml_master     cluster;
69 bc5c918e Diego Biurrun
    int64_t         cluster_pos;        ///< file offset of the current cluster
70 7973dd0b David Conrad
    uint64_t        cluster_pts;
71 bc5c918e Diego Biurrun
    int64_t         duration_offset;
72 7973dd0b David Conrad
    uint64_t        duration;
73 967d815a David Conrad
    mkv_seekhead    *main_seekhead;
74
    mkv_seekhead    *cluster_seekhead;
75 6364d534 David Conrad
    mkv_cues        *cues;
76 541d443c David Conrad
77
    struct AVMD5    *md5_ctx;
78 67143c0f David Conrad
} MatroskaMuxContext;
79
80 baf71dca David Conrad
81 e3cd80cd David Conrad
/** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit
82
 * offset, 4 bytes for target EBML ID */
83 baf71dca David Conrad
#define MAX_SEEKENTRY_SIZE 21
84
85 e3cd80cd David Conrad
/** per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2
86
 * 8-byte uint max */
87 baf71dca David Conrad
#define MAX_CUETRACKPOS_SIZE 22
88
89 e3cd80cd David Conrad
/** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */
90 baf71dca David Conrad
#define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
91
92
93 22ccb69a David Conrad
static int ebml_id_size(unsigned int id)
94
{
95
    return (av_log2(id+1)-1)/7+1;
96
}
97
98 67143c0f David Conrad
static void put_ebml_id(ByteIOContext *pb, unsigned int id)
99
{
100 432adc13 David Conrad
    int i = ebml_id_size(id);
101
    while (i--)
102
        put_byte(pb, id >> (i*8));
103 67143c0f David Conrad
}
104
105 ec8f4ad9 David Conrad
/**
106 bf898960 Diego Biurrun
 * Write an EBML size meaning "unknown size".
107 ec8f4ad9 David Conrad
 *
108 bf898960 Diego Biurrun
 * @param bytes The number of bytes the size should occupy (maximum: 8).
109 ec8f4ad9 David Conrad
 */
110
static void put_ebml_size_unknown(ByteIOContext *pb, int bytes)
111
{
112 0580a122 David Conrad
    assert(bytes <= 8);
113 203cce9a David Conrad
    put_byte(pb, 0x1ff >> bytes);
114
    while (--bytes)
115
        put_byte(pb, 0xff);
116 ec8f4ad9 David Conrad
}
117
118 1c73478c David Conrad
/**
119 0f651e8c David Conrad
 * Calculate how many bytes are needed to represent a given number in EBML.
120 1c73478c David Conrad
 */
121 0f651e8c David Conrad
static int ebml_num_size(uint64_t num)
122 1c73478c David Conrad
{
123
    int bytes = 1;
124 0f651e8c David Conrad
    while ((num+1) >> bytes*7) bytes++;
125 1c73478c David Conrad
    return bytes;
126
}
127
128 f0e9f442 David Conrad
/**
129 0f651e8c David Conrad
 * Write a number in EBML variable length format.
130 f0e9f442 David Conrad
 *
131 0f651e8c David Conrad
 * @param bytes The number of bytes that need to be used to write the number.
132 f0e9f442 David Conrad
 *              If zero, any number of bytes can be used.
133
 */
134 0f651e8c David Conrad
static void put_ebml_num(ByteIOContext *pb, uint64_t num, int bytes)
135 67143c0f David Conrad
{
136 0f651e8c David Conrad
    int i, needed_bytes = ebml_num_size(num);
137 67143c0f David Conrad
138
    // sizes larger than this are currently undefined in EBML
139 0f651e8c David Conrad
    assert(num < (1ULL<<56)-1);
140 ffb880c2 David Conrad
141 f0e9f442 David Conrad
    if (bytes == 0)
142
        // don't care how many bytes are used, so use the min
143
        bytes = needed_bytes;
144 47e08c58 David Conrad
    // the bytes needed to write the given size would exceed the bytes
145
    // that we need to use, so write unknown size. This shouldn't happen.
146 0580a122 David Conrad
    assert(bytes >= needed_bytes);
147 f0e9f442 David Conrad
148 0f651e8c David Conrad
    num |= 1ULL << bytes*7;
149 ddf16467 David Conrad
    for (i = bytes - 1; i >= 0; i--)
150 0f651e8c David Conrad
        put_byte(pb, num >> i*8);
151 67143c0f David Conrad
}
152
153
static void put_ebml_uint(ByteIOContext *pb, unsigned int elementid, uint64_t val)
154
{
155 9f38fd7e David Conrad
    int i, bytes = 1;
156 73260a11 Aurelien Jacobs
    uint64_t tmp = val;
157
    while (tmp>>=8) bytes++;
158 67143c0f David Conrad
159
    put_ebml_id(pb, elementid);
160 0f651e8c David Conrad
    put_ebml_num(pb, bytes, 0);
161 9f38fd7e David Conrad
    for (i = bytes - 1; i >= 0; i--)
162
        put_byte(pb, val >> i*8);
163 67143c0f David Conrad
}
164
165 9b6b0c79 David Conrad
static void put_ebml_float(ByteIOContext *pb, unsigned int elementid, double val)
166
{
167
    put_ebml_id(pb, elementid);
168 0f651e8c David Conrad
    put_ebml_num(pb, 8, 0);
169 9b6b0c79 David Conrad
    put_be64(pb, av_dbl2int(val));
170
}
171
172 67143c0f David Conrad
static void put_ebml_binary(ByteIOContext *pb, unsigned int elementid,
173 1e18c4d0 David Conrad
                            const uint8_t *buf, int size)
174 67143c0f David Conrad
{
175
    put_ebml_id(pb, elementid);
176 0f651e8c David Conrad
    put_ebml_num(pb, size, 0);
177 67143c0f David Conrad
    put_buffer(pb, buf, size);
178
}
179
180 1e18c4d0 David Conrad
static void put_ebml_string(ByteIOContext *pb, unsigned int elementid, const char *str)
181 67143c0f David Conrad
{
182
    put_ebml_binary(pb, elementid, str, strlen(str));
183
}
184
185 57848e9a David Conrad
/**
186 cfde5d18 David Conrad
 * Writes a void element of a given size. Useful for reserving space in
187
 * the file to be written to later.
188 57848e9a David Conrad
 *
189 5045da83 David Conrad
 * @param size The number of bytes to reserve, which must be at least 2.
190 57848e9a David Conrad
 */
191 f57b85a5 David Conrad
static void put_ebml_void(ByteIOContext *pb, uint64_t size)
192
{
193 bc5c918e Diego Biurrun
    int64_t currentpos = url_ftell(pb);
194 f57b85a5 David Conrad
195 0580a122 David Conrad
    assert(size >= 2);
196 f57b85a5 David Conrad
197
    put_ebml_id(pb, EBML_ID_VOID);
198 cfde5d18 David Conrad
    // we need to subtract the length needed to store the size from the
199
    // size we need to reserve so 2 cases, we use 8 bytes to store the
200
    // size if possible, 1 byte otherwise
201 f57b85a5 David Conrad
    if (size < 10)
202 0f651e8c David Conrad
        put_ebml_num(pb, size-1, 0);
203 f57b85a5 David Conrad
    else
204 0f651e8c David Conrad
        put_ebml_num(pb, size-9, 8);
205 2024c226 Michael Niedermayer
    while(url_ftell(pb) < currentpos + size)
206
        put_byte(pb, 0);
207 f57b85a5 David Conrad
}
208
209 baf71dca David Conrad
static ebml_master start_ebml_master(ByteIOContext *pb, unsigned int elementid, uint64_t expectedsize)
210 67143c0f David Conrad
{
211 0f651e8c David Conrad
    int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
212 67143c0f David Conrad
    put_ebml_id(pb, elementid);
213 baf71dca David Conrad
    put_ebml_size_unknown(pb, bytes);
214
    return (ebml_master){ url_ftell(pb), bytes };
215 67143c0f David Conrad
}
216
217 baf71dca David Conrad
static void end_ebml_master(ByteIOContext *pb, ebml_master master)
218 67143c0f David Conrad
{
219 bc5c918e Diego Biurrun
    int64_t pos = url_ftell(pb);
220 67143c0f David Conrad
221 ac9e1177 David Conrad
    // leave the unknown size for masters when streaming
222
    if (url_is_streamed(pb))
223
        return;
224
225 baf71dca David Conrad
    url_fseek(pb, master.pos - master.sizebytes, SEEK_SET);
226 0f651e8c David Conrad
    put_ebml_num(pb, pos - master.pos, master.sizebytes);
227 67143c0f David Conrad
    url_fseek(pb, pos, SEEK_SET);
228
}
229
230 86be6637 David Conrad
static void put_xiph_size(ByteIOContext *pb, int size)
231
{
232
    int i;
233
    for (i = 0; i < size / 255; i++)
234
        put_byte(pb, 255);
235
    put_byte(pb, size % 255);
236
}
237
238 57848e9a David Conrad
/**
239 cfde5d18 David Conrad
 * Initialize a mkv_seekhead element to be ready to index level 1 Matroska
240
 * elements. If a maximum number of elements is specified, enough space
241
 * will be reserved at the current file location to write a seek head of
242
 * that size.
243 57848e9a David Conrad
 *
244 cfde5d18 David Conrad
 * @param segment_offset The absolute offset to the position in the file
245 ab332d01 David Conrad
 *                       where the segment begins.
246
 * @param numelements The maximum number of elements that will be indexed
247 cfde5d18 David Conrad
 *                    by this seek head, 0 if unlimited.
248 57848e9a David Conrad
 */
249 bc5c918e Diego Biurrun
static mkv_seekhead * mkv_start_seekhead(ByteIOContext *pb, int64_t segment_offset, int numelements)
250 967d815a David Conrad
{
251
    mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
252
    if (new_seekhead == NULL)
253
        return NULL;
254
255
    new_seekhead->segment_offset = segment_offset;
256
257
    if (numelements > 0) {
258
        new_seekhead->filepos = url_ftell(pb);
259 cfde5d18 David Conrad
        // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID
260
        // and size, and 3 bytes to guarantee that an EBML void element
261
        // will fit afterwards
262 baf71dca David Conrad
        new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
263 967d815a David Conrad
        new_seekhead->max_entries = numelements;
264
        put_ebml_void(pb, new_seekhead->reserved_size);
265
    }
266
    return new_seekhead;
267
}
268
269
static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
270
{
271
    mkv_seekhead_entry *entries = seekhead->entries;
272
273
    // don't store more elements than we reserved space for
274
    if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
275
        return -1;
276
277
    entries = av_realloc(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry));
278
    if (entries == NULL)
279 0b38843a David Conrad
        return AVERROR(ENOMEM);
280 967d815a David Conrad
281 91ca9690 David Conrad
    entries[seekhead->num_entries  ].elementid = elementid;
282
    entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
283 967d815a David Conrad
284
    seekhead->entries = entries;
285
    return 0;
286
}
287
288 57848e9a David Conrad
/**
289 cfde5d18 David Conrad
 * Write the seek head to the file and free it. If a maximum number of
290
 * elements was specified to mkv_start_seekhead(), the seek head will
291
 * be written at the location reserved for it. Otherwise, it is written
292
 * at the current location in the file.
293 57848e9a David Conrad
 *
294 ab332d01 David Conrad
 * @return The file offset where the seekhead was written.
295 57848e9a David Conrad
 */
296 bc5c918e Diego Biurrun
static int64_t mkv_write_seekhead(ByteIOContext *pb, mkv_seekhead *seekhead)
297 967d815a David Conrad
{
298 baf71dca David Conrad
    ebml_master metaseek, seekentry;
299 bc5c918e Diego Biurrun
    int64_t currentpos;
300 967d815a David Conrad
    int i;
301
302
    currentpos = url_ftell(pb);
303
304
    if (seekhead->reserved_size > 0)
305
        url_fseek(pb, seekhead->filepos, SEEK_SET);
306
307 baf71dca David Conrad
    metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
308 967d815a David Conrad
    for (i = 0; i < seekhead->num_entries; i++) {
309
        mkv_seekhead_entry *entry = &seekhead->entries[i];
310
311 baf71dca David Conrad
        seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
312 967d815a David Conrad
313
        put_ebml_id(pb, MATROSKA_ID_SEEKID);
314 0f651e8c David Conrad
        put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
315 967d815a David Conrad
        put_ebml_id(pb, entry->elementid);
316
317
        put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
318
        end_ebml_master(pb, seekentry);
319
    }
320
    end_ebml_master(pb, metaseek);
321
322
    if (seekhead->reserved_size > 0) {
323
        uint64_t remaining = seekhead->filepos + seekhead->reserved_size - url_ftell(pb);
324
        put_ebml_void(pb, remaining);
325
        url_fseek(pb, currentpos, SEEK_SET);
326
327
        currentpos = seekhead->filepos;
328
    }
329
    av_free(seekhead->entries);
330
    av_free(seekhead);
331
332
    return currentpos;
333
}
334
335 bc5c918e Diego Biurrun
static mkv_cues * mkv_start_cues(int64_t segment_offset)
336 6364d534 David Conrad
{
337
    mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
338
    if (cues == NULL)
339
        return NULL;
340
341
    cues->segment_offset = segment_offset;
342
    return cues;
343
}
344
345 bc5c918e Diego Biurrun
static int mkv_add_cuepoint(mkv_cues *cues, AVPacket *pkt, int64_t cluster_pos)
346 6364d534 David Conrad
{
347
    mkv_cuepoint *entries = cues->entries;
348
349
    entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint));
350
    if (entries == NULL)
351 0b38843a David Conrad
        return AVERROR(ENOMEM);
352 6364d534 David Conrad
353 91ca9690 David Conrad
    entries[cues->num_entries  ].pts = pkt->pts;
354
    entries[cues->num_entries  ].tracknum = pkt->stream_index + 1;
355
    entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset;
356 6364d534 David Conrad
357
    cues->entries = entries;
358
    return 0;
359
}
360
361 bc5c918e Diego Biurrun
static int64_t mkv_write_cues(ByteIOContext *pb, mkv_cues *cues, int num_tracks)
362 6364d534 David Conrad
{
363 baf71dca David Conrad
    ebml_master cues_element;
364 bc5c918e Diego Biurrun
    int64_t currentpos;
365 6364d534 David Conrad
    int i, j;
366
367
    currentpos = url_ftell(pb);
368 baf71dca David Conrad
    cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
369 6364d534 David Conrad
370
    for (i = 0; i < cues->num_entries; i++) {
371 baf71dca David Conrad
        ebml_master cuepoint, track_positions;
372 6364d534 David Conrad
        mkv_cuepoint *entry = &cues->entries[i];
373
        uint64_t pts = entry->pts;
374
375 baf71dca David Conrad
        cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
376 6364d534 David Conrad
        put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
377
378
        // put all the entries from different tracks that have the exact same
379
        // timestamp into the same CuePoint
380
        for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
381 baf71dca David Conrad
            track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
382 6364d534 David Conrad
            put_ebml_uint(pb, MATROSKA_ID_CUETRACK          , entry[j].tracknum   );
383
            put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION, entry[j].cluster_pos);
384
            end_ebml_master(pb, track_positions);
385
        }
386
        i += j - 1;
387
        end_ebml_master(pb, cuepoint);
388
    }
389
    end_ebml_master(pb, cues_element);
390
391
    av_free(cues->entries);
392
    av_free(cues);
393
    return currentpos;
394
}
395
396 b62a33d0 David Conrad
static int put_xiph_codecpriv(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec)
397 56d55a3b David Conrad
{
398
    uint8_t *header_start[3];
399
    int header_len[3];
400
    int first_header_size;
401 86be6637 David Conrad
    int j;
402 56d55a3b David Conrad
403
    if (codec->codec_id == CODEC_ID_VORBIS)
404
        first_header_size = 30;
405
    else
406
        first_header_size = 42;
407
408
    if (ff_split_xiph_headers(codec->extradata, codec->extradata_size,
409
                              first_header_size, header_start, header_len) < 0) {
410 b62a33d0 David Conrad
        av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
411 56d55a3b David Conrad
        return -1;
412
    }
413
414
    put_byte(pb, 2);                    // number packets - 1
415
    for (j = 0; j < 2; j++) {
416 86be6637 David Conrad
        put_xiph_size(pb, header_len[j]);
417 56d55a3b David Conrad
    }
418
    for (j = 0; j < 3; j++)
419
        put_buffer(pb, header_start[j], header_len[j]);
420 801edb42 David Conrad
421
    return 0;
422 56d55a3b David Conrad
}
423 67143c0f David Conrad
424 b62a33d0 David Conrad
static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
425 07918a22 David Conrad
{
426
    int sri;
427
428
    if (codec->extradata_size < 2) {
429 ab332d01 David Conrad
        av_log(s, AV_LOG_WARNING, "No AAC extradata, unable to determine samplerate.\n");
430 07918a22 David Conrad
        return;
431
    }
432
433
    sri = ((codec->extradata[0] << 1) & 0xE) | (codec->extradata[1] >> 7);
434
    if (sri > 12) {
435 b62a33d0 David Conrad
        av_log(s, AV_LOG_WARNING, "AAC samplerate index out of bounds\n");
436 07918a22 David Conrad
        return;
437
    }
438 7bfacd4e Aurelien Jacobs
    *sample_rate = ff_mpeg4audio_sample_rates[sri];
439 07918a22 David Conrad
440
    // if sbr, get output sample rate as well
441
    if (codec->extradata_size == 5) {
442
        sri = (codec->extradata[4] >> 3) & 0xF;
443
        if (sri > 12) {
444 b62a33d0 David Conrad
            av_log(s, AV_LOG_WARNING, "AAC output samplerate index out of bounds\n");
445 07918a22 David Conrad
            return;
446
        }
447 7bfacd4e Aurelien Jacobs
        *output_sample_rate = ff_mpeg4audio_sample_rates[sri];
448 07918a22 David Conrad
    }
449
}
450
451 f009e36f Aurelien Jacobs
static int mkv_write_codecprivate(AVFormatContext *s, ByteIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
452 5c559894 David Conrad
{
453 899681cd Björn Axelsson
    ByteIOContext *dyn_cp;
454 46d18a88 David Conrad
    uint8_t *codecpriv;
455 899681cd Björn Axelsson
    int ret, codecpriv_size;
456 46d18a88 David Conrad
457 899681cd Björn Axelsson
    ret = url_open_dyn_buf(&dyn_cp);
458
    if(ret < 0)
459
        return ret;
460 5c559894 David Conrad
461
    if (native_id) {
462 c301d5ae David Conrad
        if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA)
463 899681cd Björn Axelsson
            ret = put_xiph_codecpriv(s, dyn_cp, codec);
464 c301d5ae David Conrad
        else if (codec->codec_id == CODEC_ID_FLAC)
465 2578326f Justin Ruggles
            ret = ff_flac_write_header(dyn_cp, codec);
466 aacc5f22 Aurelien Jacobs
        else if (codec->codec_id == CODEC_ID_H264)
467 9ab3f71b Aurelien Jacobs
            ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
468 c301d5ae David Conrad
        else if (codec->extradata_size)
469 899681cd Björn Axelsson
            put_buffer(dyn_cp, codec->extradata, codec->extradata_size);
470 5c559894 David Conrad
    } else if (codec->codec_type == CODEC_TYPE_VIDEO) {
471 f009e36f Aurelien Jacobs
        if (qt_id) {
472
            if (!codec->codec_tag)
473 1a40491e Daniel Verkamp
                codec->codec_tag = ff_codec_get_tag(codec_movvideo_tags, codec->codec_id);
474 f009e36f Aurelien Jacobs
            if (codec->extradata_size)
475
                put_buffer(dyn_cp, codec->extradata, codec->extradata_size);
476
        } else {
477 5c559894 David Conrad
        if (!codec->codec_tag)
478 1a40491e Daniel Verkamp
            codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
479 dc4a9f67 David Conrad
        if (!codec->codec_tag) {
480 ab332d01 David Conrad
            av_log(s, AV_LOG_ERROR, "No bmp codec ID found.");
481 dc4a9f67 David Conrad
            ret = -1;
482
        }
483 5c559894 David Conrad
484 1a40491e Daniel Verkamp
        ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
485 f009e36f Aurelien Jacobs
        }
486 5c559894 David Conrad
487
    } else if (codec->codec_type == CODEC_TYPE_AUDIO) {
488 dc4a9f67 David Conrad
        if (!codec->codec_tag)
489 1a40491e Daniel Verkamp
            codec->codec_tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
490 5c559894 David Conrad
        if (!codec->codec_tag) {
491 ab332d01 David Conrad
            av_log(s, AV_LOG_ERROR, "No wav codec ID found.");
492 46d18a88 David Conrad
            ret = -1;
493 5c559894 David Conrad
        }
494
495 1a40491e Daniel Verkamp
        ff_put_wav_header(dyn_cp, codec);
496 5c559894 David Conrad
    }
497 46d18a88 David Conrad
498 899681cd Björn Axelsson
    codecpriv_size = url_close_dyn_buf(dyn_cp, &codecpriv);
499 46d18a88 David Conrad
    if (codecpriv_size)
500
        put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
501
    av_free(codecpriv);
502
    return ret;
503 5c559894 David Conrad
}
504
505 5034ab90 David Conrad
static int mkv_write_tracks(AVFormatContext *s)
506 67143c0f David Conrad
{
507
    MatroskaMuxContext *mkv = s->priv_data;
508 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
509 baf71dca David Conrad
    ebml_master tracks;
510 6d588ecd David Conrad
    int i, j, ret;
511 67143c0f David Conrad
512 6d588ecd David Conrad
    ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, url_ftell(pb));
513
    if (ret < 0) return ret;
514 967d815a David Conrad
515 baf71dca David Conrad
    tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
516 67143c0f David Conrad
    for (i = 0; i < s->nb_streams; i++) {
517
        AVStream *st = s->streams[i];
518 f622c4f4 David Conrad
        AVCodecContext *codec = st->codec;
519 baf71dca David Conrad
        ebml_master subinfo, track;
520 f622c4f4 David Conrad
        int native_id = 0;
521 f009e36f Aurelien Jacobs
        int qt_id = 0;
522 d22f88cb David Conrad
        int bit_depth = av_get_bits_per_sample(codec->codec_id);
523 07918a22 David Conrad
        int sample_rate = codec->sample_rate;
524
        int output_sample_rate = 0;
525 5e565998 Aurelien Jacobs
        AVMetadataTag *tag;
526 07918a22 David Conrad
527 a6da1aa0 David Conrad
        if (!bit_depth)
528
            bit_depth = av_get_bits_per_sample_format(codec->sample_fmt);
529
530 07918a22 David Conrad
        if (codec->codec_id == CODEC_ID_AAC)
531 b62a33d0 David Conrad
            get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
532 f622c4f4 David Conrad
533 baf71dca David Conrad
        track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
534 815eb6a2 David Conrad
        put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER     , i + 1);
535
        put_ebml_uint (pb, MATROSKA_ID_TRACKUID        , i + 1);
536 f622c4f4 David Conrad
        put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0);    // no lacing (yet)
537 e380b918 Rafaël Carré
        put_ebml_float(pb, MATROSKA_ID_TRACKTIMECODESCALE, 1.0);
538 f622c4f4 David Conrad
539 690b4126 Anton Khirnov
        if ((tag = av_metadata_get(st->metadata, "title", NULL, 0)))
540 5e565998 Aurelien Jacobs
            put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
541
        tag = av_metadata_get(st->metadata, "language", NULL, 0);
542
        put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
543 f622c4f4 David Conrad
544 1c3db2aa David Conrad
        if (st->disposition)
545 3194b004 David Conrad
            put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
546 90c2295b Evgeniy Stepanov
547 ab332d01 David Conrad
        // look for a codec ID string specific to mkv to use,
548 cfde5d18 David Conrad
        // if none are found, use AVI codes
549 f622c4f4 David Conrad
        for (j = 0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++) {
550
            if (ff_mkv_codec_tags[j].id == codec->codec_id) {
551
                put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
552
                native_id = 1;
553
                break;
554
            }
555
        }
556
557
        switch (codec->codec_type) {
558
            case CODEC_TYPE_VIDEO:
559
                put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
560
561 f009e36f Aurelien Jacobs
                if (!native_id &&
562 1a40491e Daniel Verkamp
                      ff_codec_get_tag(codec_movvideo_tags, codec->codec_id) &&
563
                    (!ff_codec_get_tag(ff_codec_bmp_tags,   codec->codec_id)
564 f009e36f Aurelien Jacobs
                     || codec->codec_id == CODEC_ID_SVQ1
565
                     || codec->codec_id == CODEC_ID_SVQ3
566
                     || codec->codec_id == CODEC_ID_CINEPAK))
567
                    qt_id = 1;
568
569
                if (qt_id)
570
                    put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
571
                else if (!native_id)
572 ab332d01 David Conrad
                    // if there is no mkv-specific codec ID, use VFW mode
573 cc8be506 Aurelien Jacobs
                    put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
574 c301d5ae David Conrad
575 baf71dca David Conrad
                subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
576 f622c4f4 David Conrad
                // XXX: interlace flag?
577
                put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
578
                put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
579 59729451 Aurelien Jacobs
                if (st->sample_aspect_ratio.num) {
580
                    int d_width = codec->width*av_q2d(st->sample_aspect_ratio);
581
                    put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width);
582
                    put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height);
583 7332addd David Conrad
                }
584 f622c4f4 David Conrad
                end_ebml_master(pb, subinfo);
585
                break;
586
587
            case CODEC_TYPE_AUDIO:
588
                put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
589
590 c301d5ae David Conrad
                if (!native_id)
591 1a302a5c David Conrad
                    // no mkv-specific ID, use ACM mode
592 cc8be506 Aurelien Jacobs
                    put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
593 c301d5ae David Conrad
594 baf71dca David Conrad
                subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
595 f622c4f4 David Conrad
                put_ebml_uint  (pb, MATROSKA_ID_AUDIOCHANNELS    , codec->channels);
596 07918a22 David Conrad
                put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
597
                if (output_sample_rate)
598
                    put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
599 44008871 David Conrad
                if (bit_depth)
600
                    put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
601 f622c4f4 David Conrad
                end_ebml_master(pb, subinfo);
602
                break;
603
604 47e08c58 David Conrad
            case CODEC_TYPE_SUBTITLE:
605
                put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE);
606
                break;
607 f622c4f4 David Conrad
            default:
608 3967eb52 David Conrad
                av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.");
609 f622c4f4 David Conrad
                break;
610
        }
611 f009e36f Aurelien Jacobs
        ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
612 5c559894 David Conrad
        if (ret < 0) return ret;
613
614 67143c0f David Conrad
        end_ebml_master(pb, track);
615 f622c4f4 David Conrad
616
        // ms precision is the de-facto standard timescale for mkv files
617
        av_set_pts_info(st, 64, 1, 1000);
618 67143c0f David Conrad
    }
619
    end_ebml_master(pb, tracks);
620 801edb42 David Conrad
    return 0;
621 5034ab90 David Conrad
}
622
623 2bd0758e Anton Khirnov
static int mkv_write_chapters(AVFormatContext *s)
624
{
625
    MatroskaMuxContext *mkv = s->priv_data;
626
    ByteIOContext *pb = s->pb;
627
    ebml_master chapters, editionentry;
628
    AVRational scale = {1, 1E9};
629
    int i, ret;
630
631
    if (!s->nb_chapters)
632
        return 0;
633
634
    ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, url_ftell(pb));
635
    if (ret < 0) return ret;
636
637
    chapters     = start_ebml_master(pb, MATROSKA_ID_CHAPTERS    , 0);
638
    editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
639
    put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
640
    put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
641
    for (i = 0; i < s->nb_chapters; i++) {
642
        ebml_master chapteratom, chapterdisplay;
643
        AVChapter *c     = s->chapters[i];
644
        AVMetadataTag *t = NULL;
645
646
        chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
647
        put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id);
648
        put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
649
                      av_rescale_q(c->start, c->time_base, scale));
650
        put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
651
                      av_rescale_q(c->end,   c->time_base, scale));
652
        put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
653
        put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
654
        if ((t = av_metadata_get(c->metadata, "title", NULL, 0))) {
655
            chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
656
            put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
657
            put_ebml_string(pb, MATROSKA_ID_CHAPLANG  , "und");
658
            end_ebml_master(pb, chapterdisplay);
659
        }
660
        end_ebml_master(pb, chapteratom);
661
    }
662
    end_ebml_master(pb, editionentry);
663
    end_ebml_master(pb, chapters);
664
    return 0;
665
}
666
667 5034ab90 David Conrad
static int mkv_write_header(AVFormatContext *s)
668
{
669
    MatroskaMuxContext *mkv = s->priv_data;
670 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
671 baf71dca David Conrad
    ebml_master ebml_header, segment_info;
672 5e565998 Aurelien Jacobs
    AVMetadataTag *tag;
673 6d588ecd David Conrad
    int ret;
674 5034ab90 David Conrad
675 541d443c David Conrad
    mkv->md5_ctx = av_mallocz(av_md5_size);
676
    av_md5_init(mkv->md5_ctx);
677
678 baf71dca David Conrad
    ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
679 5034ab90 David Conrad
    put_ebml_uint   (pb, EBML_ID_EBMLVERSION        ,           1);
680
    put_ebml_uint   (pb, EBML_ID_EBMLREADVERSION    ,           1);
681
    put_ebml_uint   (pb, EBML_ID_EBMLMAXIDLENGTH    ,           4);
682
    put_ebml_uint   (pb, EBML_ID_EBMLMAXSIZELENGTH  ,           8);
683
    put_ebml_string (pb, EBML_ID_DOCTYPE            ,  "matroska");
684
    put_ebml_uint   (pb, EBML_ID_DOCTYPEVERSION     ,           2);
685
    put_ebml_uint   (pb, EBML_ID_DOCTYPEREADVERSION ,           2);
686
    end_ebml_master(pb, ebml_header);
687
688 baf71dca David Conrad
    mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
689 967d815a David Conrad
    mkv->segment_offset = url_ftell(pb);
690
691 cfde5d18 David Conrad
    // we write 2 seek heads - one at the end of the file to point to each
692
    // cluster, and one at the beginning to point to all other level one
693
    // elements (including the seek head at the end of the file), which
694
    // isn't more than 10 elements if we only write one of each other
695
    // currently defined level 1 element
696 967d815a David Conrad
    mkv->main_seekhead    = mkv_start_seekhead(pb, mkv->segment_offset, 10);
697
    mkv->cluster_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 0);
698 c35de1a1 David Conrad
    if (mkv->main_seekhead == NULL || mkv->cluster_seekhead == NULL)
699
        return AVERROR(ENOMEM);
700 967d815a David Conrad
701 6d588ecd David Conrad
    ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, url_ftell(pb));
702
    if (ret < 0) return ret;
703 5034ab90 David Conrad
704 baf71dca David Conrad
    segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
705 5034ab90 David Conrad
    put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
706 5e565998 Aurelien Jacobs
    if ((tag = av_metadata_get(s->metadata, "title", NULL, 0)))
707
        put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
708 5034ab90 David Conrad
    if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
709 5fd35c6e David Conrad
        put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
710 5034ab90 David Conrad
        put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
711 541d443c David Conrad
712
        // reserve space to write the segment UID later
713
        mkv->segment_uid = url_ftell(pb);
714
        put_ebml_void(pb, 19);
715 5034ab90 David Conrad
    }
716 4b8f58ee David Conrad
717 5034ab90 David Conrad
    // reserve space for the duration
718
    mkv->duration = 0;
719
    mkv->duration_offset = url_ftell(pb);
720
    put_ebml_void(pb, 11);                  // assumes double-precision float to be written
721
    end_ebml_master(pb, segment_info);
722
723 6d588ecd David Conrad
    ret = mkv_write_tracks(s);
724
    if (ret < 0) return ret;
725 67143c0f David Conrad
726 2bd0758e Anton Khirnov
    ret = mkv_write_chapters(s);
727
    if (ret < 0) return ret;
728
729 6d588ecd David Conrad
    ret = mkv_add_seekhead_entry(mkv->cluster_seekhead, MATROSKA_ID_CLUSTER, url_ftell(pb));
730
    if (ret < 0) return ret;
731 967d815a David Conrad
732 6364d534 David Conrad
    mkv->cluster_pos = url_ftell(pb);
733 baf71dca David Conrad
    mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
734 b1adb69c David Conrad
    put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, 0);
735 98186e41 David Conrad
    mkv->cluster_pts = 0;
736 b1adb69c David Conrad
737 6364d534 David Conrad
    mkv->cues = mkv_start_cues(mkv->segment_offset);
738
    if (mkv->cues == NULL)
739 0b38843a David Conrad
        return AVERROR(ENOMEM);
740 6364d534 David Conrad
741 8a86aaa3 David Conrad
    put_flush_packet(pb);
742 67143c0f David Conrad
    return 0;
743
}
744
745 1bfbe8ff Aurelien Jacobs
static int mkv_blockgroup_size(int pkt_size)
746 baf71dca David Conrad
{
747 1bfbe8ff Aurelien Jacobs
    int size = pkt_size + 4;
748 0f651e8c David Conrad
    size += ebml_num_size(size);
749 baf71dca David Conrad
    size += 2;              // EBML ID for block and block duration
750
    size += 8;              // max size of block duration
751 0f651e8c David Conrad
    size += ebml_num_size(size);
752 baf71dca David Conrad
    size += 1;              // blockgroup EBML ID
753
    return size;
754
}
755
756 b7f4e76d Aurelien Jacobs
static int ass_get_duration(const uint8_t *p)
757
{
758
    int sh, sm, ss, sc, eh, em, es, ec;
759
    uint64_t start, end;
760
761
    if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
762
               &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
763
        return 0;
764
    start = 3600000*sh + 60000*sm + 1000*ss + 10*sc;
765
    end   = 3600000*eh + 60000*em + 1000*es + 10*ec;
766
    return end - start;
767
}
768
769
static int mkv_write_ass_blocks(AVFormatContext *s, AVPacket *pkt)
770
{
771
    MatroskaMuxContext *mkv = s->priv_data;
772
    ByteIOContext *pb = s->pb;
773
    int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
774
    uint8_t *start, *end, *data = pkt->data;
775
    ebml_master blockgroup;
776
    char buffer[2048];
777
778
    while (data_size) {
779
        int duration = ass_get_duration(data);
780
        max_duration = FFMAX(duration, max_duration);
781
        end = memchr(data, '\n', data_size);
782
        size = line_size = end ? end-data+1 : data_size;
783
        size -= end ? (end[-1]=='\r')+1 : 0;
784
        start = data;
785
        for (i=0; i<3; i++, start++)
786
            if (!(start = memchr(start, ',', size-(start-data))))
787
                return max_duration;
788
        size -= start - data;
789
        sscanf(data, "Dialogue: %d,", &layer);
790
        i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
791
                     s->streams[pkt->stream_index]->nb_frames++, layer);
792
        size = FFMIN(i+size, sizeof(buffer));
793
        memcpy(buffer+i, start, size-i);
794
795
        av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
796
               "pts %" PRId64 ", duration %d\n",
797
               url_ftell(pb), size, pkt->pts, duration);
798
        blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
799
        put_ebml_id(pb, MATROSKA_ID_BLOCK);
800
        put_ebml_num(pb, size+4, 0);
801
        put_byte(pb, 0x80 | (pkt->stream_index + 1));     // this assumes stream_index is less than 126
802
        put_be16(pb, pkt->pts - mkv->cluster_pts);
803
        put_byte(pb, 0);
804
        put_buffer(pb, buffer, size);
805
        put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
806
        end_ebml_master(pb, blockgroup);
807
808
        data += line_size;
809
        data_size -= line_size;
810
    }
811
812
    return max_duration;
813
}
814
815 95527e06 David Conrad
static void mkv_write_block(AVFormatContext *s, unsigned int blockid, AVPacket *pkt, int flags)
816
{
817
    MatroskaMuxContext *mkv = s->priv_data;
818 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
819 0a63a676 Luca Abeni
    AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
820 5f8bae8d Aurelien Jacobs
    uint8_t *data = NULL;
821
    int size = pkt->size;
822 95527e06 David Conrad
823 8ffc5f9e David Conrad
    av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
824
           "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
825 c1f5aa21 David Conrad
           url_ftell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
826 5f8bae8d Aurelien Jacobs
    if (codec->codec_id == CODEC_ID_H264 && codec->extradata_size > 0 &&
827
        (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
828
        ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
829
    else
830
        data = pkt->data;
831 95527e06 David Conrad
    put_ebml_id(pb, blockid);
832 5f8bae8d Aurelien Jacobs
    put_ebml_num(pb, size+4, 0);
833 95527e06 David Conrad
    put_byte(pb, 0x80 | (pkt->stream_index + 1));     // this assumes stream_index is less than 126
834
    put_be16(pb, pkt->pts - mkv->cluster_pts);
835
    put_byte(pb, flags);
836 5f8bae8d Aurelien Jacobs
    put_buffer(pb, data, size);
837
    if (data != pkt->data)
838
        av_free(data);
839 95527e06 David Conrad
}
840
841 67143c0f David Conrad
static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
842
{
843 98186e41 David Conrad
    MatroskaMuxContext *mkv = s->priv_data;
844 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
845 9245c5ca David Conrad
    AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
846 357eba6f David Conrad
    int keyframe = !!(pkt->flags & PKT_FLAG_KEY);
847 62c24705 Aurelien Jacobs
    int duration = pkt->duration;
848 6d588ecd David Conrad
    int ret;
849 b1adb69c David Conrad
850 98186e41 David Conrad
    // start a new cluster every 5 MB or 5 sec
851 cce800b4 David Conrad
    if (url_ftell(pb) > mkv->cluster_pos + 5*1024*1024 || pkt->pts > mkv->cluster_pts + 5000) {
852 8ffc5f9e David Conrad
        av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
853
               " bytes, pts %" PRIu64 "\n", url_ftell(pb), pkt->pts);
854 98186e41 David Conrad
        end_ebml_master(pb, mkv->cluster);
855 967d815a David Conrad
856 6d588ecd David Conrad
        ret = mkv_add_seekhead_entry(mkv->cluster_seekhead, MATROSKA_ID_CLUSTER, url_ftell(pb));
857
        if (ret < 0) return ret;
858 967d815a David Conrad
859 6364d534 David Conrad
        mkv->cluster_pos = url_ftell(pb);
860 baf71dca David Conrad
        mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
861 98186e41 David Conrad
        put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, pkt->pts);
862
        mkv->cluster_pts = pkt->pts;
863 541d443c David Conrad
        av_md5_update(mkv->md5_ctx, pkt->data, FFMIN(200, pkt->size));
864 98186e41 David Conrad
    }
865
866 9245c5ca David Conrad
    if (codec->codec_type != CODEC_TYPE_SUBTITLE) {
867 56e4540d David Conrad
        mkv_write_block(s, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
868 b7f4e76d Aurelien Jacobs
    } else if (codec->codec_id == CODEC_ID_SSA) {
869
        duration = mkv_write_ass_blocks(s, pkt);
870 663a5d9d David Conrad
    } else {
871 1bfbe8ff Aurelien Jacobs
        ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
872 62c24705 Aurelien Jacobs
        duration = pkt->convergence_duration;
873 663a5d9d David Conrad
        mkv_write_block(s, MATROSKA_ID_BLOCK, pkt, 0);
874 291902c2 Aurelien Jacobs
        put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
875 663a5d9d David Conrad
        end_ebml_master(pb, blockgroup);
876
    }
877 02f487fc David Conrad
878 9245c5ca David Conrad
    if (codec->codec_type == CODEC_TYPE_VIDEO && keyframe) {
879 6d588ecd David Conrad
        ret = mkv_add_cuepoint(mkv->cues, pkt, mkv->cluster_pos);
880
        if (ret < 0) return ret;
881 6364d534 David Conrad
    }
882
883 62c24705 Aurelien Jacobs
    mkv->duration = FFMAX(mkv->duration, pkt->pts + duration);
884 67143c0f David Conrad
    return 0;
885
}
886
887
static int mkv_write_trailer(AVFormatContext *s)
888
{
889
    MatroskaMuxContext *mkv = s->priv_data;
890 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
891 bc5c918e Diego Biurrun
    int64_t currentpos, second_seekhead, cuespos;
892 9e2a3e22 David Conrad
    int ret;
893 02f487fc David Conrad
894 b1adb69c David Conrad
    end_ebml_master(pb, mkv->cluster);
895 02f487fc David Conrad
896 ac9e1177 David Conrad
    if (!url_is_streamed(pb)) {
897 e5c29287 David Conrad
        cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
898
        second_seekhead = mkv_write_seekhead(pb, mkv->cluster_seekhead);
899 6364d534 David Conrad
900 e5c29287 David Conrad
        ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES    , cuespos);
901
        if (ret < 0) return ret;
902
        ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_SEEKHEAD, second_seekhead);
903
        if (ret < 0) return ret;
904
        mkv_write_seekhead(pb, mkv->main_seekhead);
905
906
        // update the duration
907
        av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
908
        currentpos = url_ftell(pb);
909
        url_fseek(pb, mkv->duration_offset, SEEK_SET);
910
        put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
911
912
        // write the md5sum of some frames as the segment UID
913
        if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
914
            uint8_t segment_uid[16];
915
            av_md5_final(mkv->md5_ctx, segment_uid);
916
            url_fseek(pb, mkv->segment_uid, SEEK_SET);
917
            put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
918
        }
919
        url_fseek(pb, currentpos, SEEK_SET);
920 ac9e1177 David Conrad
    }
921 02f487fc David Conrad
922 67143c0f David Conrad
    end_ebml_master(pb, mkv->segment);
923 541d443c David Conrad
    av_free(mkv->md5_ctx);
924 8a86aaa3 David Conrad
    put_flush_packet(pb);
925 67143c0f David Conrad
    return 0;
926
}
927
928
AVOutputFormat matroska_muxer = {
929
    "matroska",
930 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("Matroska file format"),
931 67143c0f David Conrad
    "video/x-matroska",
932
    "mkv",
933
    sizeof(MatroskaMuxContext),
934
    CODEC_ID_MP2,
935
    CODEC_ID_MPEG4,
936
    mkv_write_header,
937
    mkv_write_packet,
938
    mkv_write_trailer,
939 25918212 Michael Niedermayer
    .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
940 1a40491e Daniel Verkamp
    .codec_tag = (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
941 c635497c David Conrad
    .subtitle_codec = CODEC_ID_TEXT,
942 67143c0f David Conrad
};
943 55c151ef David Conrad
944
AVOutputFormat matroska_audio_muxer = {
945
    "matroska",
946 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("Matroska file format"),
947 55c151ef David Conrad
    "audio/x-matroska",
948
    "mka",
949
    sizeof(MatroskaMuxContext),
950
    CODEC_ID_MP2,
951
    CODEC_ID_NONE,
952
    mkv_write_header,
953
    mkv_write_packet,
954
    mkv_write_trailer,
955 abce34d9 Aurelien Jacobs
    .flags = AVFMT_GLOBALHEADER,
956 1a40491e Daniel Verkamp
    .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
957 55c151ef David Conrad
};