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ffmpeg / libavformat / mov.c @ 6d680e1b

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1
/*
2
 * MOV demuxer
3
 * Copyright (c) 2001 Fabrice Bellard.
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
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
#include <limits.h>
23

    
24
//#define DEBUG
25

    
26
#include "avformat.h"
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#include "riff.h"
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#include "isom.h"
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#include "dv.h"
30

    
31
#ifdef CONFIG_ZLIB
32
#include <zlib.h>
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#endif
34

    
35
/*
36
 * First version by Francois Revol revol@free.fr
37
 * Seek function by Gael Chardon gael.dev@4now.net
38
 *
39
 * Features and limitations:
40
 * - reads most of the QT files I have (at least the structure),
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 *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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 * - the code is quite ugly... maybe I won't do it recursive next time :-)
43
 *
44
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
46
 *
47
 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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 * Apple:
50
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
52
 * QuickTime is a trademark of Apple (AFAIK :))
53
 */
54

    
55
#include "qtpalette.h"
56

    
57

    
58
#undef NDEBUG
59
#include <assert.h>
60

    
61
/* the QuickTime file format is quite convoluted...
62
 * it has lots of index tables, each indexing something in another one...
63
 * Here we just use what is needed to read the chunks
64
 */
65

    
66
typedef struct {
67
    int first;
68
    int count;
69
    int id;
70
} MOV_stsc_t;
71

    
72
typedef struct {
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    uint32_t type;
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    int64_t offset;
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    int64_t size; /* total size (excluding the size and type fields) */
76
} MOV_atom_t;
77

    
78
struct MOVParseTableEntry;
79

    
80
typedef struct MOVStreamContext {
81
    int ffindex; /* the ffmpeg stream id */
82
    int next_chunk;
83
    unsigned int chunk_count;
84
    int64_t *chunk_offsets;
85
    unsigned int stts_count;
86
    MOV_stts_t *stts_data;
87
    unsigned int ctts_count;
88
    MOV_stts_t *ctts_data;
89
    unsigned int edit_count; /* number of 'edit' (elst atom) */
90
    unsigned int sample_to_chunk_sz;
91
    MOV_stsc_t *sample_to_chunk;
92
    int sample_to_ctime_index;
93
    int sample_to_ctime_sample;
94
    unsigned int sample_size;
95
    unsigned int sample_count;
96
    int *sample_sizes;
97
    unsigned int keyframe_count;
98
    int *keyframes;
99
    int time_scale;
100
    int time_rate;
101
    int current_sample;
102
    unsigned int bytes_per_frame;
103
    unsigned int samples_per_frame;
104
    int dv_audio_container;
105
    int pseudo_stream_id;
106
    int16_t audio_cid; ///< stsd audio compression id
107
} MOVStreamContext;
108

    
109
typedef struct MOVContext {
110
    AVFormatContext *fc;
111
    int time_scale;
112
    int64_t duration; /* duration of the longest track */
113
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
114
    int found_mdat; /* we suppose we have enough data to read the file */
115
    AVPaletteControl palette_control;
116
    DVDemuxContext *dv_demux;
117
    AVFormatContext *dv_fctx;
118
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
119
} MOVContext;
120

    
121

    
122
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
123

    
124
/* those functions parse an atom */
125
/* return code:
126
 1: found what I wanted, exit
127
 0: continue to parse next atom
128
 -1: error occured, exit
129
 */
130
/* links atom IDs to parse functions */
131
typedef struct MOVParseTableEntry {
132
    uint32_t type;
133
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
134
} MOVParseTableEntry;
135

    
136
static const MOVParseTableEntry mov_default_parse_table[];
137

    
138
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
139
{
140
    int64_t total_size = 0;
141
    MOV_atom_t a;
142
    int i;
143
    int err = 0;
144

    
145
    a.offset = atom.offset;
146

    
147
    if (atom.size < 0)
148
        atom.size = INT64_MAX;
149
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
150
        a.size = atom.size;
151
        a.type=0;
152
        if(atom.size >= 8) {
153
            a.size = get_be32(pb);
154
            a.type = get_le32(pb);
155
        }
156
        total_size += 8;
157
        a.offset += 8;
158
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
159
                a.type, (char*)&a.type, a.size, atom.size, total_size);
160
        if (a.size == 1) { /* 64 bit extended size */
161
            a.size = get_be64(pb) - 8;
162
            a.offset += 8;
163
            total_size += 8;
164
        }
165
        if (a.size == 0) {
166
            a.size = atom.size - total_size;
167
            if (a.size <= 8)
168
                break;
169
        }
170
        a.size -= 8;
171
        if(a.size < 0)
172
            break;
173
        a.size = FFMIN(a.size, atom.size - total_size);
174

    
175
        for (i = 0; mov_default_parse_table[i].type != 0
176
             && mov_default_parse_table[i].type != a.type; i++)
177
            /* empty */;
178

    
179
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
180
            url_fskip(pb, a.size);
181
        } else {
182
            offset_t start_pos = url_ftell(pb);
183
            int64_t left;
184
            err = mov_default_parse_table[i].parse(c, pb, a);
185
            if (c->found_moov && c->found_mdat)
186
                break;
187
            left = a.size - url_ftell(pb) + start_pos;
188
            if (left > 0) /* skip garbage at atom end */
189
                url_fskip(pb, left);
190
        }
191

    
192
        a.offset += a.size;
193
        total_size += a.size;
194
    }
195

    
196
    if (!err && total_size < atom.size && atom.size < 0x7ffff) {
197
        url_fskip(pb, atom.size - total_size);
198
    }
199

    
200
    return err;
201
}
202

    
203
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
204
{
205
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
206
    uint32_t type;
207
    uint32_t ctype;
208

    
209
    get_byte(pb); /* version */
210
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
211

    
212
    /* component type */
213
    ctype = get_le32(pb);
214
    type = get_le32(pb); /* component subtype */
215

    
216
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
217
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
218
    dprintf(c->fc, "stype= %c%c%c%c\n",
219
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
220
    if(!ctype)
221
        c->isom = 1;
222
    if(type == MKTAG('v', 'i', 'd', 'e'))
223
        st->codec->codec_type = CODEC_TYPE_VIDEO;
224
    else if(type == MKTAG('s', 'o', 'u', 'n'))
225
        st->codec->codec_type = CODEC_TYPE_AUDIO;
226
    else if(type == MKTAG('m', '1', 'a', ' '))
227
        st->codec->codec_id = CODEC_ID_MP2;
228
    else if(type == MKTAG('s', 'u', 'b', 'p')) {
229
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
230
    }
231
    get_be32(pb); /* component  manufacture */
232
    get_be32(pb); /* component flags */
233
    get_be32(pb); /* component flags mask */
234

    
235
    if(atom.size <= 24)
236
        return 0; /* nothing left to read */
237

    
238
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
239
    return 0;
240
}
241

    
242
static int mp4_read_descr_len(ByteIOContext *pb)
243
{
244
    int len = 0;
245
    int count = 4;
246
    while (count--) {
247
        int c = get_byte(pb);
248
        len = (len << 7) | (c & 0x7f);
249
        if (!(c & 0x80))
250
            break;
251
    }
252
    return len;
253
}
254

    
255
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
256
{
257
    int len;
258
    *tag = get_byte(pb);
259
    len = mp4_read_descr_len(pb);
260
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
261
    return len;
262
}
263

    
264
#define MP4ESDescrTag                   0x03
265
#define MP4DecConfigDescrTag            0x04
266
#define MP4DecSpecificDescrTag          0x05
267

    
268
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
269
{
270
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
271
    int tag, len;
272

    
273
    get_be32(pb); /* version + flags */
274
    len = mp4_read_descr(c, pb, &tag);
275
    if (tag == MP4ESDescrTag) {
276
        get_be16(pb); /* ID */
277
        get_byte(pb); /* priority */
278
    } else
279
        get_be16(pb); /* ID */
280

    
281
    len = mp4_read_descr(c, pb, &tag);
282
    if (tag == MP4DecConfigDescrTag) {
283
        int object_type_id = get_byte(pb);
284
        get_byte(pb); /* stream type */
285
        get_be24(pb); /* buffer size db */
286
        get_be32(pb); /* max bitrate */
287
        get_be32(pb); /* avg bitrate */
288

    
289
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
290
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
291
        len = mp4_read_descr(c, pb, &tag);
292
        if (tag == MP4DecSpecificDescrTag) {
293
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
294
            if((uint64_t)len > (1<<30))
295
                return -1;
296
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
297
            if (!st->codec->extradata)
298
                return AVERROR(ENOMEM);
299
            get_buffer(pb, st->codec->extradata, len);
300
            st->codec->extradata_size = len;
301
            /* from mplayer */
302
            if ((*st->codec->extradata >> 3) == 29) {
303
                st->codec->codec_id = CODEC_ID_MP3ON4;
304
            }
305
        }
306
    }
307
    return 0;
308
}
309

    
310
/* this atom contains actual media data */
311
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
312
{
313
    if(atom.size == 0) /* wrong one (MP4) */
314
        return 0;
315
    c->found_mdat=1;
316
    if(c->found_moov)
317
        return 1; /* found both, just go */
318
    url_fskip(pb, atom.size);
319
    return 0; /* now go for moov */
320
}
321

    
322
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
323
{
324
    uint32_t type = get_le32(pb);
325

    
326
    if (type != MKTAG('q','t',' ',' '))
327
        c->isom = 1;
328
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
329
    get_be32(pb); /* minor version */
330
    url_fskip(pb, atom.size - 8);
331
    return 0;
332
}
333

    
334
/* this atom should contain all header atoms */
335
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
336
{
337
    if (mov_read_default(c, pb, atom) < 0)
338
        return -1;
339
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
340
    /* so we don't parse the whole file if over a network */
341
    c->found_moov=1;
342
    if(c->found_mdat)
343
        return 1; /* found both, just go */
344
    return 0; /* now go for mdat */
345
}
346

    
347

    
348
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
349
{
350
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
351
    MOVStreamContext *sc = st->priv_data;
352
    int version = get_byte(pb);
353
    int lang;
354

    
355
    if (version > 1)
356
        return 1; /* unsupported */
357

    
358
    get_byte(pb); get_byte(pb);
359
    get_byte(pb); /* flags */
360

    
361
    if (version == 1) {
362
        get_be64(pb);
363
        get_be64(pb);
364
    } else {
365
        get_be32(pb); /* creation time */
366
        get_be32(pb); /* modification time */
367
    }
368

    
369
    sc->time_scale = get_be32(pb);
370
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
371

    
372
    lang = get_be16(pb); /* language */
373
    ff_mov_lang_to_iso639(lang, st->language);
374
    get_be16(pb); /* quality */
375

    
376
    return 0;
377
}
378

    
379
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
380
{
381
    int version = get_byte(pb); /* version */
382
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
383

    
384
    if (version == 1) {
385
        get_be64(pb);
386
        get_be64(pb);
387
    } else {
388
        get_be32(pb); /* creation time */
389
        get_be32(pb); /* modification time */
390
    }
391
    c->time_scale = get_be32(pb); /* time scale */
392

    
393
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
394

    
395
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
396
    get_be32(pb); /* preferred scale */
397

    
398
    get_be16(pb); /* preferred volume */
399

    
400
    url_fskip(pb, 10); /* reserved */
401

    
402
    url_fskip(pb, 36); /* display matrix */
403

    
404
    get_be32(pb); /* preview time */
405
    get_be32(pb); /* preview duration */
406
    get_be32(pb); /* poster time */
407
    get_be32(pb); /* selection time */
408
    get_be32(pb); /* selection duration */
409
    get_be32(pb); /* current time */
410
    get_be32(pb); /* next track ID */
411

    
412
    return 0;
413
}
414

    
415
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
416
{
417
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
418

    
419
    if((uint64_t)atom.size > (1<<30))
420
        return -1;
421

    
422
    // currently SVQ3 decoder expect full STSD header - so let's fake it
423
    // this should be fixed and just SMI header should be passed
424
    av_free(st->codec->extradata);
425
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
426
    if (!st->codec->extradata)
427
        return AVERROR(ENOMEM);
428
    st->codec->extradata_size = 0x5a + atom.size;
429
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
430
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
431
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
432
    return 0;
433
}
434

    
435
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
436
{
437
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
438
    int little_endian = get_be16(pb);
439

    
440
    if (little_endian) {
441
        switch (st->codec->codec_id) {
442
        case CODEC_ID_PCM_S24BE:
443
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
444
            break;
445
        case CODEC_ID_PCM_S32BE:
446
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
447
            break;
448
        default:
449
            break;
450
        }
451
    }
452
    return 0;
453
}
454

    
455
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
456
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
457
{
458
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
459
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
460
    uint8_t *buf;
461
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
462
        return -1;
463
    buf= av_realloc(st->codec->extradata, size);
464
    if(!buf)
465
        return -1;
466
    st->codec->extradata= buf;
467
    buf+= st->codec->extradata_size;
468
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
469
    AV_WB32(       buf    , atom.size + 8);
470
    AV_WL32(       buf + 4, atom.type);
471
    get_buffer(pb, buf + 8, atom.size);
472
    return 0;
473
}
474

    
475
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
476
{
477
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
478

    
479
    if((uint64_t)atom.size > (1<<30))
480
        return -1;
481

    
482
    if (st->codec->codec_id == CODEC_ID_QDM2) {
483
        // pass all frma atom to codec, needed at least for QDM2
484
        av_free(st->codec->extradata);
485
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
486
        if (!st->codec->extradata)
487
            return AVERROR(ENOMEM);
488
        st->codec->extradata_size = atom.size;
489
        get_buffer(pb, st->codec->extradata, atom.size);
490
    } else if (atom.size > 8) { /* to read frma, esds atoms */
491
        if (mov_read_default(c, pb, atom) < 0)
492
            return -1;
493
    } else
494
        url_fskip(pb, atom.size);
495
    return 0;
496
}
497

    
498
/**
499
 * This function reads atom content and puts data in extradata without tag
500
 * nor size unlike mov_read_extradata.
501
 */
502
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
503
{
504
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
505

    
506
    if((uint64_t)atom.size > (1<<30))
507
        return -1;
508

    
509
    av_free(st->codec->extradata);
510
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
511
    if (!st->codec->extradata)
512
        return AVERROR(ENOMEM);
513
    st->codec->extradata_size = atom.size;
514
    get_buffer(pb, st->codec->extradata, atom.size);
515
    return 0;
516
}
517

    
518
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
519
{
520
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
521
    MOVStreamContext *sc = st->priv_data;
522
    unsigned int i, entries;
523

    
524
    get_byte(pb); /* version */
525
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
526

    
527
    entries = get_be32(pb);
528

    
529
    if(entries >= UINT_MAX/sizeof(int64_t))
530
        return -1;
531

    
532
    sc->chunk_count = entries;
533
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
534
    if (!sc->chunk_offsets)
535
        return -1;
536
    if (atom.type == MKTAG('s', 't', 'c', 'o')) {
537
        for(i=0; i<entries; i++) {
538
            sc->chunk_offsets[i] = get_be32(pb);
539
        }
540
    } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
541
        for(i=0; i<entries; i++) {
542
            sc->chunk_offsets[i] = get_be64(pb);
543
        }
544
    } else
545
        return -1;
546

    
547
    return 0;
548
}
549

    
550
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
551
{
552
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
553
    MOVStreamContext *sc = st->priv_data;
554
    int entries, frames_per_sample;
555
    uint32_t format;
556
    uint8_t codec_name[32];
557

    
558
    /* for palette traversal */
559
    unsigned int color_depth;
560
    unsigned int color_start;
561
    unsigned int color_count;
562
    unsigned int color_end;
563
    int color_index;
564
    int color_dec;
565
    int color_greyscale;
566
    const uint8_t *color_table;
567
    int j, pseudo_stream_id;
568
    unsigned char r, g, b;
569

    
570
    get_byte(pb); /* version */
571
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
572

    
573
    entries = get_be32(pb);
574

    
575
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { //Parsing Sample description table
576
        enum CodecID id;
577
        MOV_atom_t a = { 0, 0, 0 };
578
        offset_t start_pos = url_ftell(pb);
579
        int size = get_be32(pb); /* size */
580
        format = get_le32(pb); /* data format */
581

    
582
        get_be32(pb); /* reserved */
583
        get_be16(pb); /* reserved */
584
        get_be16(pb); /* index */
585

    
586
        if (st->codec->codec_tag &&
587
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
588
                                   : st->codec->codec_tag != MKTAG('j', 'p', 'e', 'g'))
589
           ){
590
            /* multiple fourcc, we skip jpeg, this isnt correct, we should export it as
591
               seperate AVStream but this needs a few changes in the mov demuxer, patch
592
               welcome */
593
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
594
            continue;
595
        }
596
        sc->pseudo_stream_id= pseudo_stream_id;
597

    
598
        st->codec->codec_tag = format;
599
        id = codec_get_id(codec_movaudio_tags, format);
600
        if (id<=0 && (format&0xFFFF) == 'm' + ('s'<<8))
601
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
602

    
603
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
604
            st->codec->codec_type = CODEC_TYPE_AUDIO;
605
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
606
                   format && format != MKTAG('m', 'p', '4', 's')) { /* skip old asf mpeg4 tag */
607
            id = codec_get_id(codec_movvideo_tags, format);
608
            if (id <= 0)
609
                id = codec_get_id(codec_bmp_tags, format);
610
            if (id > 0)
611
                st->codec->codec_type = CODEC_TYPE_VIDEO;
612
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
613
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
614
                if(id > 0)
615
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
616
            }
617
        }
618

    
619
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
620
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
621
                (format >> 24) & 0xff, st->codec->codec_type);
622

    
623
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
624
            st->codec->codec_id = id;
625
            get_be16(pb); /* version */
626
            get_be16(pb); /* revision level */
627
            get_be32(pb); /* vendor */
628
            get_be32(pb); /* temporal quality */
629
            get_be32(pb); /* spatial quality */
630

    
631
            st->codec->width = get_be16(pb); /* width */
632
            st->codec->height = get_be16(pb); /* height */
633

    
634
            get_be32(pb); /* horiz resolution */
635
            get_be32(pb); /* vert resolution */
636
            get_be32(pb); /* data size, always 0 */
637
            frames_per_sample = get_be16(pb); /* frames per samples */
638

    
639
            dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);
640

    
641
            get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
642
            if (codec_name[0] <= 31) {
643
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
644
                st->codec->codec_name[codec_name[0]] = 0;
645
            }
646

    
647
            st->codec->bits_per_sample = get_be16(pb); /* depth */
648
            st->codec->color_table_id = get_be16(pb); /* colortable id */
649

    
650
            /* figure out the palette situation */
651
            color_depth = st->codec->bits_per_sample & 0x1F;
652
            color_greyscale = st->codec->bits_per_sample & 0x20;
653

    
654
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
655
            if ((color_depth == 2) || (color_depth == 4) ||
656
                (color_depth == 8)) {
657
                if (color_greyscale) {
658
                    /* compute the greyscale palette */
659
                    color_count = 1 << color_depth;
660
                    color_index = 255;
661
                    color_dec = 256 / (color_count - 1);
662
                    for (j = 0; j < color_count; j++) {
663
                        r = g = b = color_index;
664
                        c->palette_control.palette[j] =
665
                            (r << 16) | (g << 8) | (b);
666
                        color_index -= color_dec;
667
                        if (color_index < 0)
668
                            color_index = 0;
669
                    }
670
                } else if (st->codec->color_table_id & 0x08) {
671
                    /* if flag bit 3 is set, use the default palette */
672
                    color_count = 1 << color_depth;
673
                    if (color_depth == 2)
674
                        color_table = ff_qt_default_palette_4;
675
                    else if (color_depth == 4)
676
                        color_table = ff_qt_default_palette_16;
677
                    else
678
                        color_table = ff_qt_default_palette_256;
679

    
680
                    for (j = 0; j < color_count; j++) {
681
                        r = color_table[j * 4 + 0];
682
                        g = color_table[j * 4 + 1];
683
                        b = color_table[j * 4 + 2];
684
                        c->palette_control.palette[j] =
685
                            (r << 16) | (g << 8) | (b);
686
                    }
687
                } else {
688
                    /* load the palette from the file */
689
                    color_start = get_be32(pb);
690
                    color_count = get_be16(pb);
691
                    color_end = get_be16(pb);
692
                    if ((color_start <= 255) &&
693
                        (color_end <= 255)) {
694
                        for (j = color_start; j <= color_end; j++) {
695
                            /* each R, G, or B component is 16 bits;
696
                             * only use the top 8 bits; skip alpha bytes
697
                             * up front */
698
                            get_byte(pb);
699
                            get_byte(pb);
700
                            r = get_byte(pb);
701
                            get_byte(pb);
702
                            g = get_byte(pb);
703
                            get_byte(pb);
704
                            b = get_byte(pb);
705
                            get_byte(pb);
706
                            c->palette_control.palette[j] =
707
                                (r << 16) | (g << 8) | (b);
708
                        }
709
                    }
710
                }
711
                st->codec->palctrl = &c->palette_control;
712
                st->codec->palctrl->palette_changed = 1;
713
            } else
714
                st->codec->palctrl = NULL;
715
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
716
            int bits_per_sample;
717
            uint16_t version = get_be16(pb);
718

    
719
            st->codec->codec_id = id;
720
            get_be16(pb); /* revision level */
721
            get_be32(pb); /* vendor */
722

    
723
            st->codec->channels = get_be16(pb);             /* channel count */
724
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
725
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
726

    
727
            sc->audio_cid = get_be16(pb);
728
            get_be16(pb); /* packet size = 0 */
729

    
730
            st->codec->sample_rate = ((get_be32(pb) >> 16));
731

    
732
            switch (st->codec->codec_id) {
733
            case CODEC_ID_PCM_S8:
734
            case CODEC_ID_PCM_U8:
735
                if (st->codec->bits_per_sample == 16)
736
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
737
                break;
738
            case CODEC_ID_PCM_S16LE:
739
            case CODEC_ID_PCM_S16BE:
740
                if (st->codec->bits_per_sample == 8)
741
                    st->codec->codec_id = CODEC_ID_PCM_S8;
742
                else if (st->codec->bits_per_sample == 24)
743
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
744
                break;
745
            /* set values for old format before stsd version 1 appeared */
746
            case CODEC_ID_MACE3:
747
                sc->samples_per_frame = 6;
748
                sc->bytes_per_frame = 2*st->codec->channels;
749
                break;
750
            case CODEC_ID_MACE6:
751
                sc->samples_per_frame = 6;
752
                sc->bytes_per_frame = 1*st->codec->channels;
753
                break;
754
            case CODEC_ID_ADPCM_IMA_QT:
755
                sc->samples_per_frame = 64;
756
                sc->bytes_per_frame = 34*st->codec->channels;
757
                break;
758
            default:
759
                break;
760
            }
761

    
762
            //Read QT version 1 fields. In version 0 these do not exist.
763
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
764
            if(!c->isom) {
765
                if(version==1) {
766
                    sc->samples_per_frame = get_be32(pb);
767
                    get_be32(pb); /* bytes per packet */
768
                    sc->bytes_per_frame = get_be32(pb);
769
                    get_be32(pb); /* bytes per sample */
770
                } else if(version==2) {
771
                    get_be32(pb); /* sizeof struct only */
772
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
773
                    st->codec->channels = get_be32(pb);
774
                    get_be32(pb); /* always 0x7F000000 */
775
                    get_be32(pb); /* bits per channel if sound is uncompressed */
776
                    get_be32(pb); /* lcpm format specific flag */
777
                    get_be32(pb); /* bytes per audio packet if constant */
778
                    get_be32(pb); /* lpcm frames per audio packet if constant */
779
                }
780
            }
781

    
782
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
783
            if (bits_per_sample) {
784
                st->codec->bits_per_sample = bits_per_sample;
785
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
786
            }
787
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
788
            st->codec->codec_id= id;
789
        } else {
790
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
791
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
792
        }
793
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
794
        a.size = size - (url_ftell(pb) - start_pos);
795
        if (a.size > 8) {
796
            if (mov_read_default(c, pb, a) < 0)
797
                return -1;
798
        } else if (a.size > 0)
799
            url_fskip(pb, a.size);
800
    }
801

    
802
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) {
803
        st->codec->sample_rate= sc->time_scale;
804
    }
805

    
806
    /* special codec parameters handling */
807
    switch (st->codec->codec_id) {
808
#ifdef CONFIG_DV_DEMUXER
809
    case CODEC_ID_DVAUDIO:
810
        c->dv_fctx = av_alloc_format_context();
811
        c->dv_demux = dv_init_demux(c->dv_fctx);
812
        if (!c->dv_demux) {
813
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
814
            return -1;
815
        }
816
        sc->dv_audio_container = 1;
817
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
818
        break;
819
#endif
820
    /* no ifdef since parameters are always those */
821
    case CODEC_ID_AMR_WB:
822
        st->codec->sample_rate= 16000;
823
        st->codec->channels= 1; /* really needed */
824
        break;
825
    case CODEC_ID_AMR_NB:
826
        st->codec->sample_rate= 8000;
827
        st->codec->channels= 1; /* really needed */
828
        break;
829
    case CODEC_ID_MP2:
830
    case CODEC_ID_MP3:
831
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
832
        st->need_parsing = AVSTREAM_PARSE_FULL;
833
        break;
834
    case CODEC_ID_ADPCM_MS:
835
    case CODEC_ID_ADPCM_IMA_WAV:
836
        st->codec->block_align = sc->bytes_per_frame;
837
        break;
838
    default:
839
        break;
840
    }
841

    
842
    return 0;
843
}
844

    
845
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
846
{
847
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
848
    MOVStreamContext *sc = st->priv_data;
849
    unsigned int i, entries;
850

    
851
    get_byte(pb); /* version */
852
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
853

    
854
    entries = get_be32(pb);
855

    
856
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
857
        return -1;
858

    
859
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
860

    
861
    sc->sample_to_chunk_sz = entries;
862
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
863
    if (!sc->sample_to_chunk)
864
        return -1;
865
    for(i=0; i<entries; i++) {
866
        sc->sample_to_chunk[i].first = get_be32(pb);
867
        sc->sample_to_chunk[i].count = get_be32(pb);
868
        sc->sample_to_chunk[i].id = get_be32(pb);
869
    }
870
    return 0;
871
}
872

    
873
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
874
{
875
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
876
    MOVStreamContext *sc = st->priv_data;
877
    unsigned int i, entries;
878

    
879
    get_byte(pb); /* version */
880
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
881

    
882
    entries = get_be32(pb);
883

    
884
    if(entries >= UINT_MAX / sizeof(int))
885
        return -1;
886

    
887
    sc->keyframe_count = entries;
888

    
889
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
890

    
891
    sc->keyframes = av_malloc(entries * sizeof(int));
892
    if (!sc->keyframes)
893
        return -1;
894
    for(i=0; i<entries; i++) {
895
        sc->keyframes[i] = get_be32(pb);
896
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
897
    }
898
    return 0;
899
}
900

    
901
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
902
{
903
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
904
    MOVStreamContext *sc = st->priv_data;
905
    unsigned int i, entries, sample_size;
906

    
907
    get_byte(pb); /* version */
908
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
909

    
910
    sample_size = get_be32(pb);
911
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
912
        sc->sample_size = sample_size;
913
    entries = get_be32(pb);
914
    if(entries >= UINT_MAX / sizeof(int))
915
        return -1;
916

    
917
    sc->sample_count = entries;
918
    if (sample_size)
919
        return 0;
920

    
921
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
922

    
923
    sc->sample_sizes = av_malloc(entries * sizeof(int));
924
    if (!sc->sample_sizes)
925
        return -1;
926
    for(i=0; i<entries; i++) {
927
        sc->sample_sizes[i] = get_be32(pb);
928
        dprintf(c->fc, "sample_sizes[]=%d\n", sc->sample_sizes[i]);
929
    }
930
    return 0;
931
}
932

    
933
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
934
{
935
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
936
    MOVStreamContext *sc = st->priv_data;
937
    unsigned int i, entries;
938
    int64_t duration=0;
939
    int64_t total_sample_count=0;
940

    
941
    get_byte(pb); /* version */
942
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
943
    entries = get_be32(pb);
944
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
945
        return -1;
946

    
947
    sc->stts_count = entries;
948
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
949
    if (!sc->stts_data)
950
        return -1;
951
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
952

    
953
    sc->time_rate=0;
954

    
955
    for(i=0; i<entries; i++) {
956
        int sample_duration;
957
        int sample_count;
958

    
959
        sample_count=get_be32(pb);
960
        sample_duration = get_be32(pb);
961
        sc->stts_data[i].count= sample_count;
962
        sc->stts_data[i].duration= sample_duration;
963

    
964
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
965

    
966
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
967

    
968
        duration+=(int64_t)sample_duration*sample_count;
969
        total_sample_count+=sample_count;
970
    }
971

    
972
    st->nb_frames= total_sample_count;
973
    if(duration)
974
        st->duration= duration;
975
    return 0;
976
}
977

    
978
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
979
{
980
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
981
    MOVStreamContext *sc = st->priv_data;
982
    unsigned int i, entries;
983

    
984
    get_byte(pb); /* version */
985
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
986
    entries = get_be32(pb);
987
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
988
        return -1;
989

    
990
    sc->ctts_count = entries;
991
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
992
    if (!sc->ctts_data)
993
        return -1;
994
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
995

    
996
    for(i=0; i<entries; i++) {
997
        int count    =get_be32(pb);
998
        int duration =get_be32(pb);
999

    
1000
        if (duration < 0) {
1001
            av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1002
            sc->ctts_count = 0;
1003
            url_fskip(pb, 8 * (entries - i - 1));
1004
            break;
1005
        }
1006
        sc->ctts_data[i].count   = count;
1007
        sc->ctts_data[i].duration= duration;
1008

    
1009
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1010
    }
1011
    return 0;
1012
}
1013

    
1014
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1015
{
1016
    AVStream *st;
1017
    MOVStreamContext *sc;
1018

    
1019
    st = av_new_stream(c->fc, c->fc->nb_streams);
1020
    if (!st) return -2;
1021
    sc = av_mallocz(sizeof(MOVStreamContext));
1022
    if (!sc) {
1023
        av_free(st);
1024
        return -1;
1025
    }
1026

    
1027
    st->priv_data = sc;
1028
    st->codec->codec_type = CODEC_TYPE_DATA;
1029
    st->start_time = 0; /* XXX: check */
1030

    
1031
    return mov_read_default(c, pb, atom);
1032
}
1033

    
1034
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1035
{
1036
    uint16_t str_size = get_be16(pb); /* string length */;
1037

    
1038
    get_be16(pb); /* skip language */
1039
    get_buffer(pb, str, FFMIN(size, str_size));
1040
}
1041

    
1042
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1043
{
1044
    uint64_t end = url_ftell(pb) + atom.size;
1045

    
1046
    while (url_ftell(pb) + 8 < end) {
1047
        uint32_t tag_size = get_be32(pb);
1048
        uint32_t tag      = get_le32(pb);
1049
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1050

    
1051
        if (next > end) // stop if tag_size is wrong
1052
            break;
1053

    
1054
        switch (tag) {
1055
        case MKTAG(0xa9,'n','a','m'):
1056
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1057
            break;
1058
        case MKTAG(0xa9,'w','r','t'):
1059
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1060
            break;
1061
        case MKTAG(0xa9,'c','p','y'):
1062
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1063
            break;
1064
        case MKTAG(0xa9,'i','n','f'):
1065
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1066
            break;
1067
        default:
1068
            break;
1069
        }
1070

    
1071
        url_fseek(pb, next, SEEK_SET);
1072
    }
1073

    
1074
    return 0;
1075
}
1076

    
1077
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1078
{
1079
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1080
    int version = get_byte(pb);
1081

    
1082
    get_byte(pb); get_byte(pb);
1083
    get_byte(pb); /* flags */
1084
    /*
1085
    MOV_TRACK_ENABLED 0x0001
1086
    MOV_TRACK_IN_MOVIE 0x0002
1087
    MOV_TRACK_IN_PREVIEW 0x0004
1088
    MOV_TRACK_IN_POSTER 0x0008
1089
    */
1090

    
1091
    if (version == 1) {
1092
        get_be64(pb);
1093
        get_be64(pb);
1094
    } else {
1095
        get_be32(pb); /* creation time */
1096
        get_be32(pb); /* modification time */
1097
    }
1098
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1099
    get_be32(pb); /* reserved */
1100
    st->start_time = 0; /* check */
1101
    (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
1102
    get_be32(pb); /* reserved */
1103
    get_be32(pb); /* reserved */
1104

    
1105
    get_be16(pb); /* layer */
1106
    get_be16(pb); /* alternate group */
1107
    get_be16(pb); /* volume */
1108
    get_be16(pb); /* reserved */
1109

    
1110
    url_fskip(pb, 36); /* display matrix */
1111

    
1112
    /* those are fixed-point */
1113
    get_be32(pb); /* track width */
1114
    get_be32(pb); /* track height */
1115

    
1116
    return 0;
1117
}
1118

    
1119
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1120
/* like the files created with Adobe Premiere 5.0, for samples see */
1121
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1122
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1123
{
1124
    int err;
1125

    
1126
    if (atom.size < 8)
1127
        return 0; /* continue */
1128
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1129
        url_fskip(pb, atom.size - 4);
1130
        return 0;
1131
    }
1132
    atom.type = get_le32(pb);
1133
    atom.offset += 8;
1134
    atom.size -= 8;
1135
    if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1136
        url_fskip(pb, atom.size);
1137
        return 0;
1138
    }
1139
    err = mov_read_mdat(c, pb, atom);
1140
    return err;
1141
}
1142

    
1143
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1144
{
1145
#ifdef CONFIG_ZLIB
1146
    ByteIOContext ctx;
1147
    uint8_t *cmov_data;
1148
    uint8_t *moov_data; /* uncompressed data */
1149
    long cmov_len, moov_len;
1150
    int ret;
1151

    
1152
    get_be32(pb); /* dcom atom */
1153
    if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1154
        return -1;
1155
    if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1156
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1157
        return -1;
1158
    }
1159
    get_be32(pb); /* cmvd atom */
1160
    if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1161
        return -1;
1162
    moov_len = get_be32(pb); /* uncompressed size */
1163
    cmov_len = atom.size - 6 * 4;
1164

    
1165
    cmov_data = av_malloc(cmov_len);
1166
    if (!cmov_data)
1167
        return -1;
1168
    moov_data = av_malloc(moov_len);
1169
    if (!moov_data) {
1170
        av_free(cmov_data);
1171
        return -1;
1172
    }
1173
    get_buffer(pb, cmov_data, cmov_len);
1174
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1175
        return -1;
1176
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1177
        return -1;
1178
    atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1179
    atom.offset = 0;
1180
    atom.size = moov_len;
1181
#ifdef DEBUG
1182
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1183
#endif
1184
    ret = mov_read_default(c, &ctx, atom);
1185
    av_free(moov_data);
1186
    av_free(cmov_data);
1187
    return ret;
1188
#else
1189
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1190
    return -1;
1191
#endif
1192
}
1193

    
1194
/* edit list atom */
1195
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1196
{
1197
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1198
    int i, edit_count;
1199

    
1200
    get_byte(pb); /* version */
1201
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1202
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1203

    
1204
    for(i=0; i<edit_count; i++){
1205
        int time;
1206
        get_be32(pb); /* Track duration */
1207
        time = get_be32(pb); /* Media time */
1208
        get_be32(pb); /* Media rate */
1209
        if (time != 0)
1210
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1211
                   "a/v desync might occur, patch welcome\n");
1212
    }
1213
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1214
    return 0;
1215
}
1216

    
1217
static const MOVParseTableEntry mov_default_parse_table[] = {
1218
/* mp4 atoms */
1219
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1220
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1221
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1222
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1223
{ MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },
1224
{ MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },
1225
{ MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },
1226
{ MKTAG( 'g', 'l', 'b', 'l' ), mov_read_glbl },
1227
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1228
{ MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },
1229
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1230
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1231
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1232
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1233
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1234
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1235
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1236
{ MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */
1237
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_glbl },
1238
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1239
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1240
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1241
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1242
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1243
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1244
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1245
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1246
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1247
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_udta },
1248
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
1249
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1250
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1251
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1252
{ 0, NULL }
1253
};
1254

    
1255
/* XXX: is it sufficient ? */
1256
static int mov_probe(AVProbeData *p)
1257
{
1258
    unsigned int offset;
1259
    uint32_t tag;
1260
    int score = 0;
1261

    
1262
    /* check file header */
1263
    offset = 0;
1264
    for(;;) {
1265
        /* ignore invalid offset */
1266
        if ((offset + 8) > (unsigned int)p->buf_size)
1267
            return score;
1268
        tag = AV_RL32(p->buf + offset + 4);
1269
        switch(tag) {
1270
        /* check for obvious tags */
1271
        case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */
1272
        case MKTAG( 'm', 'o', 'o', 'v' ):
1273
        case MKTAG( 'm', 'd', 'a', 't' ):
1274
        case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1275
        case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1276
            return AVPROBE_SCORE_MAX;
1277
        /* those are more common words, so rate then a bit less */
1278
        case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */
1279
        case MKTAG( 'w', 'i', 'd', 'e' ):
1280
        case MKTAG( 'f', 'r', 'e', 'e' ):
1281
        case MKTAG( 'j', 'u', 'n', 'k' ):
1282
        case MKTAG( 'p', 'i', 'c', 't' ):
1283
            return AVPROBE_SCORE_MAX - 5;
1284
        case MKTAG( 'f', 't', 'y', 'p' ):
1285
        case MKTAG( 's', 'k', 'i', 'p' ):
1286
        case MKTAG( 'u', 'u', 'i', 'd' ):
1287
            offset = AV_RB32(p->buf+offset) + offset;
1288
            /* if we only find those cause probedata is too small at least rate them */
1289
            score = AVPROBE_SCORE_MAX - 50;
1290
            break;
1291
        default:
1292
            /* unrecognized tag */
1293
            return score;
1294
        }
1295
    }
1296
    return score;
1297
}
1298

    
1299
static void mov_build_index(MOVContext *mov, AVStream *st)
1300
{
1301
    MOVStreamContext *sc = st->priv_data;
1302
    offset_t current_offset;
1303
    int64_t current_dts = 0;
1304
    unsigned int stts_index = 0;
1305
    unsigned int stsc_index = 0;
1306
    unsigned int stss_index = 0;
1307
    unsigned int i, j;
1308

    
1309
    if (sc->sample_sizes || st->codec->codec_type == CODEC_TYPE_VIDEO ||
1310
        sc->audio_cid == -2) {
1311
        unsigned int current_sample = 0;
1312
        unsigned int stts_sample = 0;
1313
        unsigned int keyframe, sample_size;
1314
        unsigned int distance = 0;
1315

    
1316
        st->nb_frames = sc->sample_count;
1317
        for (i = 0; i < sc->chunk_count; i++) {
1318
            current_offset = sc->chunk_offsets[i];
1319
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1320
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1321
                stsc_index++;
1322
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1323
                if (current_sample >= sc->sample_count) {
1324
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1325
                    goto out;
1326
                }
1327
                keyframe = !sc->keyframe_count || current_sample + 1 == sc->keyframes[stss_index];
1328
                if (keyframe) {
1329
                    distance = 0;
1330
                    if (stss_index + 1 < sc->keyframe_count)
1331
                        stss_index++;
1332
                }
1333
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1334
                dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1335
                        "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1336
                        current_offset, current_dts, sample_size, distance, keyframe);
1337
                if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)
1338
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1339
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1340
                current_offset += sample_size;
1341
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1342
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1343
                distance++;
1344
                stts_sample++;
1345
                current_sample++;
1346
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1347
                    stts_sample = 0;
1348
                    stts_index++;
1349
                }
1350
            }
1351
        }
1352
    } else { /* read whole chunk */
1353
        unsigned int chunk_samples, chunk_size, chunk_duration;
1354
        unsigned int frames = 1;
1355
        for (i = 0; i < sc->chunk_count; i++) {
1356
            current_offset = sc->chunk_offsets[i];
1357
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1358
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1359
                stsc_index++;
1360
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1361
            /* get chunk size, beware of alaw/ulaw/mace */
1362
            if (sc->samples_per_frame > 0 &&
1363
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1364
                if (sc->samples_per_frame < 1024)
1365
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1366
                else {
1367
                    chunk_size = sc->bytes_per_frame;
1368
                    frames = chunk_samples / sc->samples_per_frame;
1369
                    chunk_samples = sc->samples_per_frame;
1370
                }
1371
            } else if (sc->sample_size > 1 || st->codec->bits_per_sample == 8) {
1372
                chunk_size = chunk_samples * sc->sample_size;
1373
            } else {
1374
                av_log(mov->fc, AV_LOG_ERROR, "could not determine chunk size, report problem\n");
1375
                goto out;
1376
            }
1377
            for (j = 0; j < frames; j++) {
1378
            av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1379
            /* get chunk duration */
1380
            chunk_duration = 0;
1381
            while (chunk_samples > 0) {
1382
                if (chunk_samples < sc->stts_data[stts_index].count) {
1383
                    chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1384
                    sc->stts_data[stts_index].count -= chunk_samples;
1385
                    break;
1386
                } else {
1387
                    chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1388
                    chunk_samples -= sc->stts_data[stts_index].count;
1389
                    if (stts_index + 1 < sc->stts_count)
1390
                        stts_index++;
1391
                }
1392
            }
1393
            current_offset += sc->bytes_per_frame;
1394
            dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", size %d, "
1395
                    "duration %d\n", st->index, i, current_offset, current_dts, chunk_size, chunk_duration);
1396
            assert(chunk_duration % sc->time_rate == 0);
1397
            current_dts += chunk_duration / sc->time_rate;
1398
            }
1399
        }
1400
    }
1401
 out:
1402
    /* adjust sample count to avindex entries */
1403
    sc->sample_count = st->nb_index_entries;
1404
}
1405

    
1406
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1407
{
1408
    MOVContext *mov = s->priv_data;
1409
    ByteIOContext *pb = s->pb;
1410
    int i, err;
1411
    MOV_atom_t atom = { 0, 0, 0 };
1412

    
1413
    mov->fc = s;
1414

    
1415
    if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1416
        atom.size = url_fsize(pb);
1417
    else
1418
        atom.size = INT64_MAX;
1419

    
1420
    /* check MOV header */
1421
    err = mov_read_default(mov, pb, atom);
1422
    if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1423
        av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",
1424
                err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1425
        return -1;
1426
    }
1427
    dprintf(mov->fc, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1428

    
1429
    for(i=0; i<s->nb_streams; i++) {
1430
        AVStream *st = s->streams[i];
1431
        MOVStreamContext *sc = st->priv_data;
1432
        /* sanity checks */
1433
        if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||
1434
           (!sc->sample_size && !sc->sample_count)){
1435
            av_log(s, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");
1436
            sc->sample_count = 0; //ignore track
1437
            continue;
1438
        }
1439
        if(!sc->time_rate)
1440
            sc->time_rate=1;
1441
        if(!sc->time_scale)
1442
            sc->time_scale= mov->time_scale;
1443
        av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1444

    
1445
        if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)
1446
            st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1447

    
1448
        if(st->duration != AV_NOPTS_VALUE){
1449
            assert(st->duration % sc->time_rate == 0);
1450
            st->duration /= sc->time_rate;
1451
        }
1452
        sc->ffindex = i;
1453
        mov_build_index(mov, st);
1454

    
1455
        switch (st->codec->codec_id) {
1456
#ifdef CONFIG_H261_DECODER
1457
        case CODEC_ID_H261:
1458
#endif
1459
#ifdef CONFIG_H263_DECODER
1460
        case CODEC_ID_H263:
1461
#endif
1462
#ifdef CONFIG_MPEG4_DECODER
1463
        case CODEC_ID_MPEG4:
1464
#endif
1465
            st->codec->width= 0; /* let decoder init width/height */
1466
            st->codec->height= 0;
1467
            break;
1468
#ifdef CONFIG_LIBFAAD
1469
        case CODEC_ID_AAC:
1470
#endif
1471
#ifdef CONFIG_VORBIS_DECODER
1472
        case CODEC_ID_VORBIS:
1473
#endif
1474
        case CODEC_ID_MP3ON4:
1475
            st->codec->sample_rate= 0; /* let decoder init parameters properly */
1476
            break;
1477
        }
1478
    }
1479

    
1480
    for(i=0; i<s->nb_streams; i++) {
1481
        MOVStreamContext *sc = s->streams[i]->priv_data;
1482
        /* Do not need those anymore. */
1483
        av_freep(&sc->chunk_offsets);
1484
        av_freep(&sc->sample_to_chunk);
1485
        av_freep(&sc->sample_sizes);
1486
        av_freep(&sc->keyframes);
1487
        av_freep(&sc->stts_data);
1488
    }
1489
    return 0;
1490
}
1491

    
1492
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1493
{
1494
    MOVContext *mov = s->priv_data;
1495
    MOVStreamContext *sc = 0;
1496
    AVIndexEntry *sample = 0;
1497
    int64_t best_dts = INT64_MAX;
1498
    int i;
1499

    
1500
    for (i = 0; i < s->nb_streams; i++) {
1501
        AVStream *st = s->streams[i];
1502
        MOVStreamContext *msc = st->priv_data;
1503
        if (st->discard != AVDISCARD_ALL && msc->current_sample < msc->sample_count) {
1504
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1505
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1506
                                     AV_TIME_BASE, msc->time_scale);
1507
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1508
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1509
                (!url_is_streamed(s->pb) &&
1510
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1511
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))) {
1512
                sample = current_sample;
1513
                best_dts = dts;
1514
                sc = msc;
1515
            }
1516
        }
1517
    }
1518
    if (!sample)
1519
        return -1;
1520
    /* must be done just before reading, to avoid infinite loop on sample */
1521
    sc->current_sample++;
1522
    if (url_fseek(s->pb, sample->pos, SEEK_SET) != sample->pos) {
1523
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1524
               sc->ffindex, sample->pos);
1525
        return -1;
1526
    }
1527
    av_get_packet(s->pb, pkt, sample->size);
1528
#ifdef CONFIG_DV_DEMUXER
1529
    if (mov->dv_demux && sc->dv_audio_container) {
1530
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1531
        av_free(pkt->data);
1532
        pkt->size = 0;
1533
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1534
            return -1;
1535
    }
1536
#endif
1537
    pkt->stream_index = sc->ffindex;
1538
    pkt->dts = sample->timestamp;
1539
    if (sc->ctts_data) {
1540
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1541
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1542
        /* update ctts context */
1543
        sc->sample_to_ctime_sample++;
1544
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1545
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1546
            sc->sample_to_ctime_index++;
1547
            sc->sample_to_ctime_sample = 0;
1548
        }
1549
    } else {
1550
        pkt->pts = pkt->dts;
1551
    }
1552
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1553
    pkt->pos = sample->pos;
1554
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1555
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1556
    return 0;
1557
}
1558

    
1559
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1560
{
1561
    MOVStreamContext *sc = st->priv_data;
1562
    int sample, time_sample;
1563
    int i;
1564

    
1565
    sample = av_index_search_timestamp(st, timestamp, flags);
1566
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1567
    if (sample < 0) /* not sure what to do */
1568
        return -1;
1569
    sc->current_sample = sample;
1570
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1571
    /* adjust ctts index */
1572
    if (sc->ctts_data) {
1573
        time_sample = 0;
1574
        for (i = 0; i < sc->ctts_count; i++) {
1575
            int next = time_sample + sc->ctts_data[i].count;
1576
            if (next > sc->current_sample) {
1577
                sc->sample_to_ctime_index = i;
1578
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1579
                break;
1580
            }
1581
            time_sample = next;
1582
        }
1583
    }
1584
    return sample;
1585
}
1586

    
1587
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1588
{
1589
    AVStream *st;
1590
    int64_t seek_timestamp, timestamp;
1591
    int sample;
1592
    int i;
1593

    
1594
    if (stream_index >= s->nb_streams)
1595
        return -1;
1596

    
1597
    st = s->streams[stream_index];
1598
    sample = mov_seek_stream(st, sample_time, flags);
1599
    if (sample < 0)
1600
        return -1;
1601

    
1602
    /* adjust seek timestamp to found sample timestamp */
1603
    seek_timestamp = st->index_entries[sample].timestamp;
1604

    
1605
    for (i = 0; i < s->nb_streams; i++) {
1606
        st = s->streams[i];
1607
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1608
            continue;
1609

    
1610
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1611
        mov_seek_stream(st, timestamp, flags);
1612
    }
1613
    return 0;
1614
}
1615

    
1616
static int mov_read_close(AVFormatContext *s)
1617
{
1618
    int i;
1619
    MOVContext *mov = s->priv_data;
1620
    for(i=0; i<s->nb_streams; i++) {
1621
        MOVStreamContext *sc = s->streams[i]->priv_data;
1622
        av_freep(&sc->ctts_data);
1623
    }
1624
    if(mov->dv_demux){
1625
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1626
            av_freep(&mov->dv_fctx->streams[i]->codec);
1627
            av_freep(&mov->dv_fctx->streams[i]);
1628
        }
1629
        av_freep(&mov->dv_fctx);
1630
        av_freep(&mov->dv_demux);
1631
    }
1632
    return 0;
1633
}
1634

    
1635
AVInputFormat mov_demuxer = {
1636
    "mov,mp4,m4a,3gp,3g2,mj2",
1637
    "QuickTime/MPEG4/Motion JPEG 2000 format",
1638
    sizeof(MOVContext),
1639
    mov_probe,
1640
    mov_read_header,
1641
    mov_read_packet,
1642
    mov_read_close,
1643
    mov_read_seek,
1644
};