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ffmpeg / libavformat / mov.c @ dbb37657

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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,
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.
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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"
27
#include "riff.h"
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#include "isom.h"
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#include "dv.h"
30

    
31
#ifdef CONFIG_ZLIB
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#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/
45
 * 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/
51
 *  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 {
73
    uint32_t type;
74
    char *path;
75
} MOV_dref_t;
76

    
77
typedef struct {
78
    uint32_t type;
79
    int64_t offset;
80
    int64_t size; /* total size (excluding the size and type fields) */
81
} MOV_atom_t;
82

    
83
struct MOVParseTableEntry;
84

    
85
typedef struct MOVStreamContext {
86
    ByteIOContext *pb;
87
    int ffindex; /* the ffmpeg stream id */
88
    int next_chunk;
89
    unsigned int chunk_count;
90
    int64_t *chunk_offsets;
91
    unsigned int stts_count;
92
    MOV_stts_t *stts_data;
93
    unsigned int ctts_count;
94
    MOV_stts_t *ctts_data;
95
    unsigned int edit_count; /* number of 'edit' (elst atom) */
96
    unsigned int sample_to_chunk_sz;
97
    MOV_stsc_t *sample_to_chunk;
98
    int sample_to_ctime_index;
99
    int sample_to_ctime_sample;
100
    unsigned int sample_size;
101
    unsigned int sample_count;
102
    int *sample_sizes;
103
    unsigned int keyframe_count;
104
    int *keyframes;
105
    int time_scale;
106
    int time_rate;
107
    int current_sample;
108
    unsigned int bytes_per_frame;
109
    unsigned int samples_per_frame;
110
    int dv_audio_container;
111
    int pseudo_stream_id;
112
    int16_t audio_cid; ///< stsd audio compression id
113
    unsigned drefs_count;
114
    MOV_dref_t *drefs;
115
    int dref_id;
116
} MOVStreamContext;
117

    
118
typedef struct MOVContext {
119
    AVFormatContext *fc;
120
    int time_scale;
121
    int64_t duration; /* duration of the longest track */
122
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
123
    int found_mdat; /* we suppose we have enough data to read the file */
124
    AVPaletteControl palette_control;
125
    DVDemuxContext *dv_demux;
126
    AVFormatContext *dv_fctx;
127
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
128
} MOVContext;
129

    
130

    
131
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
132

    
133
/* those functions parse an atom */
134
/* return code:
135
 1: found what I wanted, exit
136
 0: continue to parse next atom
137
 -1: error occured, exit
138
 */
139
/* links atom IDs to parse functions */
140
typedef struct MOVParseTableEntry {
141
    uint32_t type;
142
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
143
} MOVParseTableEntry;
144

    
145
static const MOVParseTableEntry mov_default_parse_table[];
146

    
147
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
148
{
149
    int64_t total_size = 0;
150
    MOV_atom_t a;
151
    int i;
152
    int err = 0;
153

    
154
    a.offset = atom.offset;
155

    
156
    if (atom.size < 0)
157
        atom.size = INT64_MAX;
158
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
159
        a.size = atom.size;
160
        a.type=0;
161
        if(atom.size >= 8) {
162
            a.size = get_be32(pb);
163
            a.type = get_le32(pb);
164
        }
165
        total_size += 8;
166
        a.offset += 8;
167
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
168
                a.type, (char*)&a.type, a.size, atom.size, total_size);
169
        if (a.size == 1) { /* 64 bit extended size */
170
            a.size = get_be64(pb) - 8;
171
            a.offset += 8;
172
            total_size += 8;
173
        }
174
        if (a.size == 0) {
175
            a.size = atom.size - total_size;
176
            if (a.size <= 8)
177
                break;
178
        }
179
        a.size -= 8;
180
        if(a.size < 0)
181
            break;
182
        a.size = FFMIN(a.size, atom.size - total_size);
183

    
184
        for (i = 0; mov_default_parse_table[i].type != 0
185
             && mov_default_parse_table[i].type != a.type; i++)
186
            /* empty */;
187

    
188
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
189
            url_fskip(pb, a.size);
190
        } else {
191
            offset_t start_pos = url_ftell(pb);
192
            int64_t left;
193
            err = mov_default_parse_table[i].parse(c, pb, a);
194
            if (c->found_moov && c->found_mdat)
195
                break;
196
            left = a.size - url_ftell(pb) + start_pos;
197
            if (left > 0) /* skip garbage at atom end */
198
                url_fskip(pb, left);
199
        }
200

    
201
        a.offset += a.size;
202
        total_size += a.size;
203
    }
204

    
205
    if (!err && total_size < atom.size && atom.size < 0x7ffff) {
206
        url_fskip(pb, atom.size - total_size);
207
    }
208

    
209
    return err;
210
}
211

    
212
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
213
{
214
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
215
    MOVStreamContext *sc = st->priv_data;
216
    int entries, i, j;
217

    
218
    get_be32(pb); // version + flags
219
    entries = get_be32(pb);
220
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
221
        return -1;
222
    sc->drefs_count = entries;
223
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
224

    
225
    for (i = 0; i < sc->drefs_count; i++) {
226
        MOV_dref_t *dref = &sc->drefs[i];
227
        uint32_t size = get_be32(pb);
228
        offset_t next = url_ftell(pb) + size - 4;
229

    
230
        dref->type = get_le32(pb);
231
        get_be32(pb); // version + flags
232
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
233

    
234
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
235
            /* macintosh alias record */
236
            uint16_t volume_len, len;
237
            char volume[28];
238
            int16_t type;
239

    
240
            url_fskip(pb, 10);
241

    
242
            volume_len = get_byte(pb);
243
            volume_len = FFMIN(volume_len, 27);
244
            get_buffer(pb, volume, 27);
245
            volume[volume_len] = 0;
246
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
247

    
248
            url_fskip(pb, 112);
249

    
250
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
251
                type = get_be16(pb);
252
                len = get_be16(pb);
253
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
254
                if (len&1)
255
                    len += 1;
256
                if (type == 2) { // absolute path
257
                    av_free(dref->path);
258
                    dref->path = av_mallocz(len+1);
259
                    if (!dref->path)
260
                        return AVERROR(ENOMEM);
261
                    get_buffer(pb, dref->path, len);
262
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
263
                        len -= volume_len;
264
                        memmove(dref->path, dref->path+volume_len, len);
265
                        dref->path[len] = 0;
266
                    }
267
                    for (j = 0; j < len; j++)
268
                        if (dref->path[j] == ':')
269
                            dref->path[j] = '/';
270
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
271
                } else
272
                    url_fskip(pb, len);
273
            }
274
        }
275
        url_fseek(pb, next, SEEK_SET);
276
    }
277
    return 0;
278
}
279

    
280
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
281
{
282
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
283
    uint32_t type;
284
    uint32_t ctype;
285

    
286
    get_byte(pb); /* version */
287
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
288

    
289
    /* component type */
290
    ctype = get_le32(pb);
291
    type = get_le32(pb); /* component subtype */
292

    
293
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
294
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
295
    dprintf(c->fc, "stype= %c%c%c%c\n",
296
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
297
    if(!ctype)
298
        c->isom = 1;
299
    if(type == MKTAG('v', 'i', 'd', 'e'))
300
        st->codec->codec_type = CODEC_TYPE_VIDEO;
301
    else if(type == MKTAG('s', 'o', 'u', 'n'))
302
        st->codec->codec_type = CODEC_TYPE_AUDIO;
303
    else if(type == MKTAG('m', '1', 'a', ' '))
304
        st->codec->codec_id = CODEC_ID_MP2;
305
    else if(type == MKTAG('s', 'u', 'b', 'p')) {
306
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
307
    }
308
    get_be32(pb); /* component  manufacture */
309
    get_be32(pb); /* component flags */
310
    get_be32(pb); /* component flags mask */
311

    
312
    if(atom.size <= 24)
313
        return 0; /* nothing left to read */
314

    
315
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
316
    return 0;
317
}
318

    
319
static int mp4_read_descr_len(ByteIOContext *pb)
320
{
321
    int len = 0;
322
    int count = 4;
323
    while (count--) {
324
        int c = get_byte(pb);
325
        len = (len << 7) | (c & 0x7f);
326
        if (!(c & 0x80))
327
            break;
328
    }
329
    return len;
330
}
331

    
332
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
333
{
334
    int len;
335
    *tag = get_byte(pb);
336
    len = mp4_read_descr_len(pb);
337
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
338
    return len;
339
}
340

    
341
#define MP4ESDescrTag                   0x03
342
#define MP4DecConfigDescrTag            0x04
343
#define MP4DecSpecificDescrTag          0x05
344

    
345
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
346
{
347
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
348
    int tag, len;
349

    
350
    get_be32(pb); /* version + flags */
351
    len = mp4_read_descr(c, pb, &tag);
352
    if (tag == MP4ESDescrTag) {
353
        get_be16(pb); /* ID */
354
        get_byte(pb); /* priority */
355
    } else
356
        get_be16(pb); /* ID */
357

    
358
    len = mp4_read_descr(c, pb, &tag);
359
    if (tag == MP4DecConfigDescrTag) {
360
        int object_type_id = get_byte(pb);
361
        get_byte(pb); /* stream type */
362
        get_be24(pb); /* buffer size db */
363
        get_be32(pb); /* max bitrate */
364
        get_be32(pb); /* avg bitrate */
365

    
366
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
367
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
368
        len = mp4_read_descr(c, pb, &tag);
369
        if (tag == MP4DecSpecificDescrTag) {
370
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
371
            if((uint64_t)len > (1<<30))
372
                return -1;
373
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
374
            if (!st->codec->extradata)
375
                return AVERROR(ENOMEM);
376
            get_buffer(pb, st->codec->extradata, len);
377
            st->codec->extradata_size = len;
378
            /* from mplayer */
379
            if ((*st->codec->extradata >> 3) == 29) {
380
                st->codec->codec_id = CODEC_ID_MP3ON4;
381
            }
382
        }
383
    }
384
    return 0;
385
}
386

    
387
/* this atom contains actual media data */
388
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
389
{
390
    if(atom.size == 0) /* wrong one (MP4) */
391
        return 0;
392
    c->found_mdat=1;
393
    if(c->found_moov)
394
        return 1; /* found both, just go */
395
    url_fskip(pb, atom.size);
396
    return 0; /* now go for moov */
397
}
398

    
399
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
400
{
401
    uint32_t type = get_le32(pb);
402

    
403
    if (type != MKTAG('q','t',' ',' '))
404
        c->isom = 1;
405
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
406
    get_be32(pb); /* minor version */
407
    url_fskip(pb, atom.size - 8);
408
    return 0;
409
}
410

    
411
/* this atom should contain all header atoms */
412
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
413
{
414
    if (mov_read_default(c, pb, atom) < 0)
415
        return -1;
416
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
417
    /* so we don't parse the whole file if over a network */
418
    c->found_moov=1;
419
    if(c->found_mdat)
420
        return 1; /* found both, just go */
421
    return 0; /* now go for mdat */
422
}
423

    
424

    
425
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
426
{
427
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
428
    MOVStreamContext *sc = st->priv_data;
429
    int version = get_byte(pb);
430
    int lang;
431

    
432
    if (version > 1)
433
        return 1; /* unsupported */
434

    
435
    get_byte(pb); get_byte(pb);
436
    get_byte(pb); /* flags */
437

    
438
    if (version == 1) {
439
        get_be64(pb);
440
        get_be64(pb);
441
    } else {
442
        get_be32(pb); /* creation time */
443
        get_be32(pb); /* modification time */
444
    }
445

    
446
    sc->time_scale = get_be32(pb);
447
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
448

    
449
    lang = get_be16(pb); /* language */
450
    ff_mov_lang_to_iso639(lang, st->language);
451
    get_be16(pb); /* quality */
452

    
453
    return 0;
454
}
455

    
456
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
457
{
458
    int version = get_byte(pb); /* version */
459
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
460

    
461
    if (version == 1) {
462
        get_be64(pb);
463
        get_be64(pb);
464
    } else {
465
        get_be32(pb); /* creation time */
466
        get_be32(pb); /* modification time */
467
    }
468
    c->time_scale = get_be32(pb); /* time scale */
469

    
470
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
471

    
472
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
473
    get_be32(pb); /* preferred scale */
474

    
475
    get_be16(pb); /* preferred volume */
476

    
477
    url_fskip(pb, 10); /* reserved */
478

    
479
    url_fskip(pb, 36); /* display matrix */
480

    
481
    get_be32(pb); /* preview time */
482
    get_be32(pb); /* preview duration */
483
    get_be32(pb); /* poster time */
484
    get_be32(pb); /* selection time */
485
    get_be32(pb); /* selection duration */
486
    get_be32(pb); /* current time */
487
    get_be32(pb); /* next track ID */
488

    
489
    return 0;
490
}
491

    
492
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
493
{
494
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
495

    
496
    if((uint64_t)atom.size > (1<<30))
497
        return -1;
498

    
499
    // currently SVQ3 decoder expect full STSD header - so let's fake it
500
    // this should be fixed and just SMI header should be passed
501
    av_free(st->codec->extradata);
502
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
503
    if (!st->codec->extradata)
504
        return AVERROR(ENOMEM);
505
    st->codec->extradata_size = 0x5a + atom.size;
506
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
507
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
508
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
509
    return 0;
510
}
511

    
512
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
513
{
514
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
515
    int little_endian = get_be16(pb);
516

    
517
    if (little_endian) {
518
        switch (st->codec->codec_id) {
519
        case CODEC_ID_PCM_S24BE:
520
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
521
            break;
522
        case CODEC_ID_PCM_S32BE:
523
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
524
            break;
525
        default:
526
            break;
527
        }
528
    }
529
    return 0;
530
}
531

    
532
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
533
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
534
{
535
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
536
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
537
    uint8_t *buf;
538
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
539
        return -1;
540
    buf= av_realloc(st->codec->extradata, size);
541
    if(!buf)
542
        return -1;
543
    st->codec->extradata= buf;
544
    buf+= st->codec->extradata_size;
545
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
546
    AV_WB32(       buf    , atom.size + 8);
547
    AV_WL32(       buf + 4, atom.type);
548
    get_buffer(pb, buf + 8, atom.size);
549
    return 0;
550
}
551

    
552
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
553
{
554
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
555

    
556
    if((uint64_t)atom.size > (1<<30))
557
        return -1;
558

    
559
    if (st->codec->codec_id == CODEC_ID_QDM2) {
560
        // pass all frma atom to codec, needed at least for QDM2
561
        av_free(st->codec->extradata);
562
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
563
        if (!st->codec->extradata)
564
            return AVERROR(ENOMEM);
565
        st->codec->extradata_size = atom.size;
566
        get_buffer(pb, st->codec->extradata, atom.size);
567
    } else if (atom.size > 8) { /* to read frma, esds atoms */
568
        if (mov_read_default(c, pb, atom) < 0)
569
            return -1;
570
    } else
571
        url_fskip(pb, atom.size);
572
    return 0;
573
}
574

    
575
/**
576
 * This function reads atom content and puts data in extradata without tag
577
 * nor size unlike mov_read_extradata.
578
 */
579
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
580
{
581
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
582

    
583
    if((uint64_t)atom.size > (1<<30))
584
        return -1;
585

    
586
    av_free(st->codec->extradata);
587
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
588
    if (!st->codec->extradata)
589
        return AVERROR(ENOMEM);
590
    st->codec->extradata_size = atom.size;
591
    get_buffer(pb, st->codec->extradata, atom.size);
592
    return 0;
593
}
594

    
595
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
596
{
597
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
598
    MOVStreamContext *sc = st->priv_data;
599
    unsigned int i, entries;
600

    
601
    get_byte(pb); /* version */
602
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
603

    
604
    entries = get_be32(pb);
605

    
606
    if(entries >= UINT_MAX/sizeof(int64_t))
607
        return -1;
608

    
609
    sc->chunk_count = entries;
610
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
611
    if (!sc->chunk_offsets)
612
        return -1;
613
    if (atom.type == MKTAG('s', 't', 'c', 'o')) {
614
        for(i=0; i<entries; i++) {
615
            sc->chunk_offsets[i] = get_be32(pb);
616
        }
617
    } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
618
        for(i=0; i<entries; i++) {
619
            sc->chunk_offsets[i] = get_be64(pb);
620
        }
621
    } else
622
        return -1;
623

    
624
    return 0;
625
}
626

    
627
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
628
{
629
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
630
    MOVStreamContext *sc = st->priv_data;
631
    int entries, frames_per_sample;
632
    uint32_t format;
633
    uint8_t codec_name[32];
634

    
635
    /* for palette traversal */
636
    unsigned int color_depth;
637
    unsigned int color_start;
638
    unsigned int color_count;
639
    unsigned int color_end;
640
    int color_index;
641
    int color_dec;
642
    int color_greyscale;
643
    const uint8_t *color_table;
644
    int j, pseudo_stream_id;
645
    unsigned char r, g, b;
646

    
647
    get_byte(pb); /* version */
648
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
649

    
650
    entries = get_be32(pb);
651

    
652
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { //Parsing Sample description table
653
        enum CodecID id;
654
        int dref_id;
655
        MOV_atom_t a = { 0, 0, 0 };
656
        offset_t start_pos = url_ftell(pb);
657
        int size = get_be32(pb); /* size */
658
        format = get_le32(pb); /* data format */
659

    
660
        get_be32(pb); /* reserved */
661
        get_be16(pb); /* reserved */
662
        dref_id = get_be16(pb);
663

    
664
        if (st->codec->codec_tag &&
665
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
666
                                   : st->codec->codec_tag != MKTAG('j', 'p', 'e', 'g'))
667
           ){
668
            /* multiple fourcc, we skip jpeg, this isnt correct, we should export it as
669
               seperate AVStream but this needs a few changes in the mov demuxer, patch
670
               welcome */
671
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
672
            continue;
673
        }
674
        sc->pseudo_stream_id= pseudo_stream_id;
675
        sc->dref_id= dref_id;
676

    
677
        st->codec->codec_tag = format;
678
        id = codec_get_id(codec_movaudio_tags, format);
679
        if (id<=0 && (format&0xFFFF) == 'm' + ('s'<<8))
680
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
681

    
682
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
683
            st->codec->codec_type = CODEC_TYPE_AUDIO;
684
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
685
                   format && format != MKTAG('m', 'p', '4', 's')) { /* skip old asf mpeg4 tag */
686
            id = codec_get_id(codec_movvideo_tags, format);
687
            if (id <= 0)
688
                id = codec_get_id(codec_bmp_tags, format);
689
            if (id > 0)
690
                st->codec->codec_type = CODEC_TYPE_VIDEO;
691
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
692
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
693
                if(id > 0)
694
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
695
            }
696
        }
697

    
698
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
699
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
700
                (format >> 24) & 0xff, st->codec->codec_type);
701

    
702
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
703
            st->codec->codec_id = id;
704
            get_be16(pb); /* version */
705
            get_be16(pb); /* revision level */
706
            get_be32(pb); /* vendor */
707
            get_be32(pb); /* temporal quality */
708
            get_be32(pb); /* spatial quality */
709

    
710
            st->codec->width = get_be16(pb); /* width */
711
            st->codec->height = get_be16(pb); /* height */
712

    
713
            get_be32(pb); /* horiz resolution */
714
            get_be32(pb); /* vert resolution */
715
            get_be32(pb); /* data size, always 0 */
716
            frames_per_sample = get_be16(pb); /* frames per samples */
717

    
718
            dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);
719

    
720
            get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
721
            if (codec_name[0] <= 31) {
722
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
723
                st->codec->codec_name[codec_name[0]] = 0;
724
            }
725

    
726
            st->codec->bits_per_sample = get_be16(pb); /* depth */
727
            st->codec->color_table_id = get_be16(pb); /* colortable id */
728

    
729
            /* figure out the palette situation */
730
            color_depth = st->codec->bits_per_sample & 0x1F;
731
            color_greyscale = st->codec->bits_per_sample & 0x20;
732

    
733
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
734
            if ((color_depth == 2) || (color_depth == 4) ||
735
                (color_depth == 8)) {
736
                if (color_greyscale) {
737
                    /* compute the greyscale palette */
738
                    color_count = 1 << color_depth;
739
                    color_index = 255;
740
                    color_dec = 256 / (color_count - 1);
741
                    for (j = 0; j < color_count; j++) {
742
                        r = g = b = color_index;
743
                        c->palette_control.palette[j] =
744
                            (r << 16) | (g << 8) | (b);
745
                        color_index -= color_dec;
746
                        if (color_index < 0)
747
                            color_index = 0;
748
                    }
749
                } else if (st->codec->color_table_id & 0x08) {
750
                    /* if flag bit 3 is set, use the default palette */
751
                    color_count = 1 << color_depth;
752
                    if (color_depth == 2)
753
                        color_table = ff_qt_default_palette_4;
754
                    else if (color_depth == 4)
755
                        color_table = ff_qt_default_palette_16;
756
                    else
757
                        color_table = ff_qt_default_palette_256;
758

    
759
                    for (j = 0; j < color_count; j++) {
760
                        r = color_table[j * 4 + 0];
761
                        g = color_table[j * 4 + 1];
762
                        b = color_table[j * 4 + 2];
763
                        c->palette_control.palette[j] =
764
                            (r << 16) | (g << 8) | (b);
765
                    }
766
                } else {
767
                    /* load the palette from the file */
768
                    color_start = get_be32(pb);
769
                    color_count = get_be16(pb);
770
                    color_end = get_be16(pb);
771
                    if ((color_start <= 255) &&
772
                        (color_end <= 255)) {
773
                        for (j = color_start; j <= color_end; j++) {
774
                            /* each R, G, or B component is 16 bits;
775
                             * only use the top 8 bits; skip alpha bytes
776
                             * up front */
777
                            get_byte(pb);
778
                            get_byte(pb);
779
                            r = get_byte(pb);
780
                            get_byte(pb);
781
                            g = get_byte(pb);
782
                            get_byte(pb);
783
                            b = get_byte(pb);
784
                            get_byte(pb);
785
                            c->palette_control.palette[j] =
786
                                (r << 16) | (g << 8) | (b);
787
                        }
788
                    }
789
                }
790
                st->codec->palctrl = &c->palette_control;
791
                st->codec->palctrl->palette_changed = 1;
792
            } else
793
                st->codec->palctrl = NULL;
794
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
795
            int bits_per_sample;
796
            uint16_t version = get_be16(pb);
797

    
798
            st->codec->codec_id = id;
799
            get_be16(pb); /* revision level */
800
            get_be32(pb); /* vendor */
801

    
802
            st->codec->channels = get_be16(pb);             /* channel count */
803
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
804
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
805

    
806
            sc->audio_cid = get_be16(pb);
807
            get_be16(pb); /* packet size = 0 */
808

    
809
            st->codec->sample_rate = ((get_be32(pb) >> 16));
810

    
811
            switch (st->codec->codec_id) {
812
            case CODEC_ID_PCM_S8:
813
            case CODEC_ID_PCM_U8:
814
                if (st->codec->bits_per_sample == 16)
815
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
816
                break;
817
            case CODEC_ID_PCM_S16LE:
818
            case CODEC_ID_PCM_S16BE:
819
                if (st->codec->bits_per_sample == 8)
820
                    st->codec->codec_id = CODEC_ID_PCM_S8;
821
                else if (st->codec->bits_per_sample == 24)
822
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
823
                break;
824
            /* set values for old format before stsd version 1 appeared */
825
            case CODEC_ID_MACE3:
826
                sc->samples_per_frame = 6;
827
                sc->bytes_per_frame = 2*st->codec->channels;
828
                break;
829
            case CODEC_ID_MACE6:
830
                sc->samples_per_frame = 6;
831
                sc->bytes_per_frame = 1*st->codec->channels;
832
                break;
833
            case CODEC_ID_ADPCM_IMA_QT:
834
                sc->samples_per_frame = 64;
835
                sc->bytes_per_frame = 34*st->codec->channels;
836
                break;
837
            default:
838
                break;
839
            }
840

    
841
            //Read QT version 1 fields. In version 0 these do not exist.
842
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
843
            if(!c->isom) {
844
                if(version==1) {
845
                    sc->samples_per_frame = get_be32(pb);
846
                    get_be32(pb); /* bytes per packet */
847
                    sc->bytes_per_frame = get_be32(pb);
848
                    get_be32(pb); /* bytes per sample */
849
                } else if(version==2) {
850
                    get_be32(pb); /* sizeof struct only */
851
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
852
                    st->codec->channels = get_be32(pb);
853
                    get_be32(pb); /* always 0x7F000000 */
854
                    get_be32(pb); /* bits per channel if sound is uncompressed */
855
                    get_be32(pb); /* lcpm format specific flag */
856
                    get_be32(pb); /* bytes per audio packet if constant */
857
                    get_be32(pb); /* lpcm frames per audio packet if constant */
858
                }
859
            }
860

    
861
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
862
            if (bits_per_sample) {
863
                st->codec->bits_per_sample = bits_per_sample;
864
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
865
            }
866
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
867
            st->codec->codec_id= id;
868
        } else {
869
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
870
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
871
        }
872
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
873
        a.size = size - (url_ftell(pb) - start_pos);
874
        if (a.size > 8) {
875
            if (mov_read_default(c, pb, a) < 0)
876
                return -1;
877
        } else if (a.size > 0)
878
            url_fskip(pb, a.size);
879
    }
880

    
881
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
882
        st->codec->sample_rate= sc->time_scale;
883

    
884
    /* special codec parameters handling */
885
    switch (st->codec->codec_id) {
886
#ifdef CONFIG_DV_DEMUXER
887
    case CODEC_ID_DVAUDIO:
888
        c->dv_fctx = av_alloc_format_context();
889
        c->dv_demux = dv_init_demux(c->dv_fctx);
890
        if (!c->dv_demux) {
891
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
892
            return -1;
893
        }
894
        sc->dv_audio_container = 1;
895
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
896
        break;
897
#endif
898
    /* no ifdef since parameters are always those */
899
    case CODEC_ID_AMR_WB:
900
        st->codec->sample_rate= 16000;
901
        st->codec->channels= 1; /* really needed */
902
        break;
903
    case CODEC_ID_AMR_NB:
904
        st->codec->sample_rate= 8000;
905
        st->codec->channels= 1; /* really needed */
906
        break;
907
    case CODEC_ID_MP2:
908
    case CODEC_ID_MP3:
909
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
910
        st->need_parsing = AVSTREAM_PARSE_FULL;
911
        break;
912
    case CODEC_ID_ADPCM_MS:
913
    case CODEC_ID_ADPCM_IMA_WAV:
914
        st->codec->block_align = sc->bytes_per_frame;
915
        break;
916
    default:
917
        break;
918
    }
919

    
920
    return 0;
921
}
922

    
923
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
924
{
925
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
926
    MOVStreamContext *sc = st->priv_data;
927
    unsigned int i, entries;
928

    
929
    get_byte(pb); /* version */
930
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
931

    
932
    entries = get_be32(pb);
933

    
934
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
935
        return -1;
936

    
937
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
938

    
939
    sc->sample_to_chunk_sz = entries;
940
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
941
    if (!sc->sample_to_chunk)
942
        return -1;
943
    for(i=0; i<entries; i++) {
944
        sc->sample_to_chunk[i].first = get_be32(pb);
945
        sc->sample_to_chunk[i].count = get_be32(pb);
946
        sc->sample_to_chunk[i].id = get_be32(pb);
947
    }
948
    return 0;
949
}
950

    
951
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
952
{
953
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
954
    MOVStreamContext *sc = st->priv_data;
955
    unsigned int i, entries;
956

    
957
    get_byte(pb); /* version */
958
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
959

    
960
    entries = get_be32(pb);
961

    
962
    if(entries >= UINT_MAX / sizeof(int))
963
        return -1;
964

    
965
    sc->keyframe_count = entries;
966

    
967
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
968

    
969
    sc->keyframes = av_malloc(entries * sizeof(int));
970
    if (!sc->keyframes)
971
        return -1;
972
    for(i=0; i<entries; i++) {
973
        sc->keyframes[i] = get_be32(pb);
974
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
975
    }
976
    return 0;
977
}
978

    
979
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
980
{
981
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
982
    MOVStreamContext *sc = st->priv_data;
983
    unsigned int i, entries, sample_size;
984

    
985
    get_byte(pb); /* version */
986
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
987

    
988
    sample_size = get_be32(pb);
989
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
990
        sc->sample_size = sample_size;
991
    entries = get_be32(pb);
992
    if(entries >= UINT_MAX / sizeof(int))
993
        return -1;
994

    
995
    sc->sample_count = entries;
996
    if (sample_size)
997
        return 0;
998

    
999
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1000

    
1001
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1002
    if (!sc->sample_sizes)
1003
        return -1;
1004
    for(i=0; i<entries; i++) {
1005
        sc->sample_sizes[i] = get_be32(pb);
1006
        dprintf(c->fc, "sample_sizes[]=%d\n", sc->sample_sizes[i]);
1007
    }
1008
    return 0;
1009
}
1010

    
1011
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1012
{
1013
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1014
    MOVStreamContext *sc = st->priv_data;
1015
    unsigned int i, entries;
1016
    int64_t duration=0;
1017
    int64_t total_sample_count=0;
1018

    
1019
    get_byte(pb); /* version */
1020
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1021
    entries = get_be32(pb);
1022
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1023
        return -1;
1024

    
1025
    sc->stts_count = entries;
1026
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1027
    if (!sc->stts_data)
1028
        return -1;
1029
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1030

    
1031
    sc->time_rate=0;
1032

    
1033
    for(i=0; i<entries; i++) {
1034
        int sample_duration;
1035
        int sample_count;
1036

    
1037
        sample_count=get_be32(pb);
1038
        sample_duration = get_be32(pb);
1039
        sc->stts_data[i].count= sample_count;
1040
        sc->stts_data[i].duration= sample_duration;
1041

    
1042
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1043

    
1044
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1045

    
1046
        duration+=(int64_t)sample_duration*sample_count;
1047
        total_sample_count+=sample_count;
1048
    }
1049

    
1050
    st->nb_frames= total_sample_count;
1051
    if(duration)
1052
        st->duration= duration;
1053
    return 0;
1054
}
1055

    
1056
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1057
{
1058
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1059
    MOVStreamContext *sc = st->priv_data;
1060
    unsigned int i, entries;
1061

    
1062
    get_byte(pb); /* version */
1063
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1064
    entries = get_be32(pb);
1065
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1066
        return -1;
1067

    
1068
    sc->ctts_count = entries;
1069
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1070
    if (!sc->ctts_data)
1071
        return -1;
1072
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1073

    
1074
    for(i=0; i<entries; i++) {
1075
        int count    =get_be32(pb);
1076
        int duration =get_be32(pb);
1077

    
1078
        if (duration < 0) {
1079
            av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1080
            sc->ctts_count = 0;
1081
            url_fskip(pb, 8 * (entries - i - 1));
1082
            break;
1083
        }
1084
        sc->ctts_data[i].count   = count;
1085
        sc->ctts_data[i].duration= duration;
1086

    
1087
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1088
    }
1089
    return 0;
1090
}
1091

    
1092
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1093
{
1094
    AVStream *st;
1095
    MOVStreamContext *sc;
1096

    
1097
    st = av_new_stream(c->fc, c->fc->nb_streams);
1098
    if (!st) return -2;
1099
    sc = av_mallocz(sizeof(MOVStreamContext));
1100
    if (!sc) {
1101
        av_free(st);
1102
        return -1;
1103
    }
1104

    
1105
    st->priv_data = sc;
1106
    st->codec->codec_type = CODEC_TYPE_DATA;
1107
    st->start_time = 0; /* XXX: check */
1108

    
1109
    return mov_read_default(c, pb, atom);
1110
}
1111

    
1112
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1113
{
1114
    uint16_t str_size = get_be16(pb); /* string length */;
1115

    
1116
    get_be16(pb); /* skip language */
1117
    get_buffer(pb, str, FFMIN(size, str_size));
1118
}
1119

    
1120
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1121
{
1122
    uint64_t end = url_ftell(pb) + atom.size;
1123

    
1124
    while (url_ftell(pb) + 8 < end) {
1125
        uint32_t tag_size = get_be32(pb);
1126
        uint32_t tag      = get_le32(pb);
1127
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1128

    
1129
        if (next > end) // stop if tag_size is wrong
1130
            break;
1131

    
1132
        switch (tag) {
1133
        case MKTAG(0xa9,'n','a','m'):
1134
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1135
            break;
1136
        case MKTAG(0xa9,'w','r','t'):
1137
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1138
            break;
1139
        case MKTAG(0xa9,'c','p','y'):
1140
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1141
            break;
1142
        case MKTAG(0xa9,'i','n','f'):
1143
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1144
            break;
1145
        default:
1146
            break;
1147
        }
1148

    
1149
        url_fseek(pb, next, SEEK_SET);
1150
    }
1151

    
1152
    return 0;
1153
}
1154

    
1155
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1156
{
1157
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1158
    int version = get_byte(pb);
1159

    
1160
    get_byte(pb); get_byte(pb);
1161
    get_byte(pb); /* flags */
1162
    /*
1163
    MOV_TRACK_ENABLED 0x0001
1164
    MOV_TRACK_IN_MOVIE 0x0002
1165
    MOV_TRACK_IN_PREVIEW 0x0004
1166
    MOV_TRACK_IN_POSTER 0x0008
1167
    */
1168

    
1169
    if (version == 1) {
1170
        get_be64(pb);
1171
        get_be64(pb);
1172
    } else {
1173
        get_be32(pb); /* creation time */
1174
        get_be32(pb); /* modification time */
1175
    }
1176
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1177
    get_be32(pb); /* reserved */
1178
    st->start_time = 0; /* check */
1179
    (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
1180
    get_be32(pb); /* reserved */
1181
    get_be32(pb); /* reserved */
1182

    
1183
    get_be16(pb); /* layer */
1184
    get_be16(pb); /* alternate group */
1185
    get_be16(pb); /* volume */
1186
    get_be16(pb); /* reserved */
1187

    
1188
    url_fskip(pb, 36); /* display matrix */
1189

    
1190
    /* those are fixed-point */
1191
    get_be32(pb); /* track width */
1192
    get_be32(pb); /* track height */
1193

    
1194
    return 0;
1195
}
1196

    
1197
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1198
/* like the files created with Adobe Premiere 5.0, for samples see */
1199
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1200
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1201
{
1202
    int err;
1203

    
1204
    if (atom.size < 8)
1205
        return 0; /* continue */
1206
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1207
        url_fskip(pb, atom.size - 4);
1208
        return 0;
1209
    }
1210
    atom.type = get_le32(pb);
1211
    atom.offset += 8;
1212
    atom.size -= 8;
1213
    if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1214
        url_fskip(pb, atom.size);
1215
        return 0;
1216
    }
1217
    err = mov_read_mdat(c, pb, atom);
1218
    return err;
1219
}
1220

    
1221
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1222
{
1223
#ifdef CONFIG_ZLIB
1224
    ByteIOContext ctx;
1225
    uint8_t *cmov_data;
1226
    uint8_t *moov_data; /* uncompressed data */
1227
    long cmov_len, moov_len;
1228
    int ret;
1229

    
1230
    get_be32(pb); /* dcom atom */
1231
    if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1232
        return -1;
1233
    if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1234
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1235
        return -1;
1236
    }
1237
    get_be32(pb); /* cmvd atom */
1238
    if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1239
        return -1;
1240
    moov_len = get_be32(pb); /* uncompressed size */
1241
    cmov_len = atom.size - 6 * 4;
1242

    
1243
    cmov_data = av_malloc(cmov_len);
1244
    if (!cmov_data)
1245
        return -1;
1246
    moov_data = av_malloc(moov_len);
1247
    if (!moov_data) {
1248
        av_free(cmov_data);
1249
        return -1;
1250
    }
1251
    get_buffer(pb, cmov_data, cmov_len);
1252
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1253
        return -1;
1254
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1255
        return -1;
1256
    atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1257
    atom.offset = 0;
1258
    atom.size = moov_len;
1259
#ifdef DEBUG
1260
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1261
#endif
1262
    ret = mov_read_default(c, &ctx, atom);
1263
    av_free(moov_data);
1264
    av_free(cmov_data);
1265
    return ret;
1266
#else
1267
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1268
    return -1;
1269
#endif
1270
}
1271

    
1272
/* edit list atom */
1273
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1274
{
1275
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1276
    int i, edit_count;
1277

    
1278
    get_byte(pb); /* version */
1279
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1280
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1281

    
1282
    for(i=0; i<edit_count; i++){
1283
        int time;
1284
        get_be32(pb); /* Track duration */
1285
        time = get_be32(pb); /* Media time */
1286
        get_be32(pb); /* Media rate */
1287
        if (time != 0)
1288
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1289
                   "a/v desync might occur, patch welcome\n");
1290
    }
1291
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1292
    return 0;
1293
}
1294

    
1295
static const MOVParseTableEntry mov_default_parse_table[] = {
1296
/* mp4 atoms */
1297
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1298
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1299
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default },
1300
{ MKTAG( 'd', 'r', 'e', 'f' ), mov_read_dref },
1301
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1302
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1303
{ MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },
1304
{ MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },
1305
{ MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },
1306
{ MKTAG( 'g', 'l', 'b', 'l' ), mov_read_glbl },
1307
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1308
{ MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },
1309
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1310
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1311
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1312
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1313
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1314
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1315
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1316
{ MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */
1317
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_glbl },
1318
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1319
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1320
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1321
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1322
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1323
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1324
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1325
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1326
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1327
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_udta },
1328
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
1329
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1330
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1331
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1332
{ 0, NULL }
1333
};
1334

    
1335
/* XXX: is it sufficient ? */
1336
static int mov_probe(AVProbeData *p)
1337
{
1338
    unsigned int offset;
1339
    uint32_t tag;
1340
    int score = 0;
1341

    
1342
    /* check file header */
1343
    offset = 0;
1344
    for(;;) {
1345
        /* ignore invalid offset */
1346
        if ((offset + 8) > (unsigned int)p->buf_size)
1347
            return score;
1348
        tag = AV_RL32(p->buf + offset + 4);
1349
        switch(tag) {
1350
        /* check for obvious tags */
1351
        case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */
1352
        case MKTAG( 'm', 'o', 'o', 'v' ):
1353
        case MKTAG( 'm', 'd', 'a', 't' ):
1354
        case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1355
        case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1356
            return AVPROBE_SCORE_MAX;
1357
        /* those are more common words, so rate then a bit less */
1358
        case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */
1359
        case MKTAG( 'w', 'i', 'd', 'e' ):
1360
        case MKTAG( 'f', 'r', 'e', 'e' ):
1361
        case MKTAG( 'j', 'u', 'n', 'k' ):
1362
        case MKTAG( 'p', 'i', 'c', 't' ):
1363
            return AVPROBE_SCORE_MAX - 5;
1364
        case MKTAG( 'f', 't', 'y', 'p' ):
1365
        case MKTAG( 's', 'k', 'i', 'p' ):
1366
        case MKTAG( 'u', 'u', 'i', 'd' ):
1367
            offset = AV_RB32(p->buf+offset) + offset;
1368
            /* if we only find those cause probedata is too small at least rate them */
1369
            score = AVPROBE_SCORE_MAX - 50;
1370
            break;
1371
        default:
1372
            /* unrecognized tag */
1373
            return score;
1374
        }
1375
    }
1376
    return score;
1377
}
1378

    
1379
static void mov_build_index(MOVContext *mov, AVStream *st)
1380
{
1381
    MOVStreamContext *sc = st->priv_data;
1382
    offset_t current_offset;
1383
    int64_t current_dts = 0;
1384
    unsigned int stts_index = 0;
1385
    unsigned int stsc_index = 0;
1386
    unsigned int stss_index = 0;
1387
    unsigned int i, j;
1388

    
1389
    if (sc->sample_sizes || st->codec->codec_type == CODEC_TYPE_VIDEO ||
1390
        sc->audio_cid == -2) {
1391
        unsigned int current_sample = 0;
1392
        unsigned int stts_sample = 0;
1393
        unsigned int keyframe, sample_size;
1394
        unsigned int distance = 0;
1395
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1396

    
1397
        st->nb_frames = sc->sample_count;
1398
        for (i = 0; i < sc->chunk_count; i++) {
1399
            current_offset = sc->chunk_offsets[i];
1400
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1401
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1402
                stsc_index++;
1403
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1404
                if (current_sample >= sc->sample_count) {
1405
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1406
                    goto out;
1407
                }
1408
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1409
                if (keyframe) {
1410
                    distance = 0;
1411
                    if (stss_index + 1 < sc->keyframe_count)
1412
                        stss_index++;
1413
                }
1414
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1415
                dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1416
                        "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1417
                        current_offset, current_dts, sample_size, distance, keyframe);
1418
                if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)
1419
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1420
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1421
                current_offset += sample_size;
1422
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1423
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1424
                distance++;
1425
                stts_sample++;
1426
                current_sample++;
1427
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1428
                    stts_sample = 0;
1429
                    stts_index++;
1430
                }
1431
            }
1432
        }
1433
    } else { /* read whole chunk */
1434
        unsigned int chunk_samples, chunk_size, chunk_duration;
1435
        unsigned int frames = 1;
1436
        for (i = 0; i < sc->chunk_count; i++) {
1437
            current_offset = sc->chunk_offsets[i];
1438
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1439
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1440
                stsc_index++;
1441
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1442
            /* get chunk size, beware of alaw/ulaw/mace */
1443
            if (sc->samples_per_frame > 0 &&
1444
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1445
                if (sc->samples_per_frame < 1024)
1446
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1447
                else {
1448
                    chunk_size = sc->bytes_per_frame;
1449
                    frames = chunk_samples / sc->samples_per_frame;
1450
                    chunk_samples = sc->samples_per_frame;
1451
                }
1452
            } else if (sc->sample_size > 1 || st->codec->bits_per_sample == 8) {
1453
                chunk_size = chunk_samples * sc->sample_size;
1454
            } else {
1455
                av_log(mov->fc, AV_LOG_ERROR, "could not determine chunk size, report problem\n");
1456
                goto out;
1457
            }
1458
            for (j = 0; j < frames; j++) {
1459
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1460
                /* get chunk duration */
1461
                chunk_duration = 0;
1462
                while (chunk_samples > 0) {
1463
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1464
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1465
                        sc->stts_data[stts_index].count -= chunk_samples;
1466
                        break;
1467
                    } else {
1468
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1469
                        chunk_samples -= sc->stts_data[stts_index].count;
1470
                        if (stts_index + 1 < sc->stts_count)
1471
                            stts_index++;
1472
                    }
1473
                }
1474
                current_offset += sc->bytes_per_frame;
1475
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", size %d, "
1476
                        "duration %d\n", st->index, i, current_offset, current_dts, chunk_size, chunk_duration);
1477
                assert(chunk_duration % sc->time_rate == 0);
1478
                current_dts += chunk_duration / sc->time_rate;
1479
            }
1480
        }
1481
    }
1482
 out:
1483
    /* adjust sample count to avindex entries */
1484
    sc->sample_count = st->nb_index_entries;
1485
}
1486

    
1487
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1488
{
1489
    MOVContext *mov = s->priv_data;
1490
    ByteIOContext *pb = s->pb;
1491
    int i, err;
1492
    MOV_atom_t atom = { 0, 0, 0 };
1493

    
1494
    mov->fc = s;
1495

    
1496
    if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1497
        atom.size = url_fsize(pb);
1498
    else
1499
        atom.size = INT64_MAX;
1500

    
1501
    /* check MOV header */
1502
    err = mov_read_default(mov, pb, atom);
1503
    if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1504
        av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",
1505
                err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1506
        return -1;
1507
    }
1508
    dprintf(mov->fc, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1509

    
1510
    for(i=0; i<s->nb_streams; i++) {
1511
        AVStream *st = s->streams[i];
1512
        MOVStreamContext *sc = st->priv_data;
1513
        /* sanity checks */
1514
        if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||
1515
           (!sc->sample_size && !sc->sample_count)){
1516
            av_log(s, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");
1517
            sc->sample_count = 0; //ignore track
1518
            continue;
1519
        }
1520
        if(!sc->time_rate)
1521
            sc->time_rate=1;
1522
        if(!sc->time_scale)
1523
            sc->time_scale= mov->time_scale;
1524
        av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1525

    
1526
        if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)
1527
            st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1528

    
1529
        if(st->duration != AV_NOPTS_VALUE){
1530
            assert(st->duration % sc->time_rate == 0);
1531
            st->duration /= sc->time_rate;
1532
        }
1533
        sc->ffindex = i;
1534
        mov_build_index(mov, st);
1535

    
1536
        if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1537
            if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1538
                av_log(s, AV_LOG_ERROR, "stream %d, error opening external essence: %s\n",
1539
                       st->index, strerror(errno));
1540
        } else
1541
            sc->pb = s->pb;
1542

    
1543
        switch (st->codec->codec_id) {
1544
#ifdef CONFIG_H261_DECODER
1545
        case CODEC_ID_H261:
1546
#endif
1547
#ifdef CONFIG_H263_DECODER
1548
        case CODEC_ID_H263:
1549
#endif
1550
#ifdef CONFIG_MPEG4_DECODER
1551
        case CODEC_ID_MPEG4:
1552
#endif
1553
            st->codec->width= 0; /* let decoder init width/height */
1554
            st->codec->height= 0;
1555
            break;
1556
#ifdef CONFIG_LIBFAAD
1557
        case CODEC_ID_AAC:
1558
#endif
1559
#ifdef CONFIG_VORBIS_DECODER
1560
        case CODEC_ID_VORBIS:
1561
#endif
1562
        case CODEC_ID_MP3ON4:
1563
            st->codec->sample_rate= 0; /* let decoder init parameters properly */
1564
            break;
1565
        }
1566
    }
1567

    
1568
    for(i=0; i<s->nb_streams; i++) {
1569
        MOVStreamContext *sc = s->streams[i]->priv_data;
1570
        /* Do not need those anymore. */
1571
        av_freep(&sc->chunk_offsets);
1572
        av_freep(&sc->sample_to_chunk);
1573
        av_freep(&sc->sample_sizes);
1574
        av_freep(&sc->keyframes);
1575
        av_freep(&sc->stts_data);
1576
    }
1577
    return 0;
1578
}
1579

    
1580
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1581
{
1582
    MOVContext *mov = s->priv_data;
1583
    MOVStreamContext *sc = 0;
1584
    AVIndexEntry *sample = 0;
1585
    int64_t best_dts = INT64_MAX;
1586
    int i;
1587

    
1588
    for (i = 0; i < s->nb_streams; i++) {
1589
        AVStream *st = s->streams[i];
1590
        MOVStreamContext *msc = st->priv_data;
1591
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1592
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1593
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1594
                                     AV_TIME_BASE, msc->time_scale);
1595
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1596
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1597
                (!url_is_streamed(s->pb) &&
1598
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1599
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1600
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1601
                sample = current_sample;
1602
                best_dts = dts;
1603
                sc = msc;
1604
            }
1605
        }
1606
    }
1607
    if (!sample)
1608
        return -1;
1609
    /* must be done just before reading, to avoid infinite loop on sample */
1610
    sc->current_sample++;
1611
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1612
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1613
               sc->ffindex, sample->pos);
1614
        return -1;
1615
    }
1616
    av_get_packet(sc->pb, pkt, sample->size);
1617
#ifdef CONFIG_DV_DEMUXER
1618
    if (mov->dv_demux && sc->dv_audio_container) {
1619
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1620
        av_free(pkt->data);
1621
        pkt->size = 0;
1622
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1623
            return -1;
1624
    }
1625
#endif
1626
    pkt->stream_index = sc->ffindex;
1627
    pkt->dts = sample->timestamp;
1628
    if (sc->ctts_data) {
1629
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1630
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1631
        /* update ctts context */
1632
        sc->sample_to_ctime_sample++;
1633
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1634
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1635
            sc->sample_to_ctime_index++;
1636
            sc->sample_to_ctime_sample = 0;
1637
        }
1638
    } else {
1639
        pkt->pts = pkt->dts;
1640
    }
1641
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1642
    pkt->pos = sample->pos;
1643
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1644
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1645
    return 0;
1646
}
1647

    
1648
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1649
{
1650
    MOVStreamContext *sc = st->priv_data;
1651
    int sample, time_sample;
1652
    int i;
1653

    
1654
    sample = av_index_search_timestamp(st, timestamp, flags);
1655
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1656
    if (sample < 0) /* not sure what to do */
1657
        return -1;
1658
    sc->current_sample = sample;
1659
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1660
    /* adjust ctts index */
1661
    if (sc->ctts_data) {
1662
        time_sample = 0;
1663
        for (i = 0; i < sc->ctts_count; i++) {
1664
            int next = time_sample + sc->ctts_data[i].count;
1665
            if (next > sc->current_sample) {
1666
                sc->sample_to_ctime_index = i;
1667
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1668
                break;
1669
            }
1670
            time_sample = next;
1671
        }
1672
    }
1673
    return sample;
1674
}
1675

    
1676
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1677
{
1678
    AVStream *st;
1679
    int64_t seek_timestamp, timestamp;
1680
    int sample;
1681
    int i;
1682

    
1683
    if (stream_index >= s->nb_streams)
1684
        return -1;
1685

    
1686
    st = s->streams[stream_index];
1687
    sample = mov_seek_stream(st, sample_time, flags);
1688
    if (sample < 0)
1689
        return -1;
1690

    
1691
    /* adjust seek timestamp to found sample timestamp */
1692
    seek_timestamp = st->index_entries[sample].timestamp;
1693

    
1694
    for (i = 0; i < s->nb_streams; i++) {
1695
        st = s->streams[i];
1696
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1697
            continue;
1698

    
1699
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1700
        mov_seek_stream(st, timestamp, flags);
1701
    }
1702
    return 0;
1703
}
1704

    
1705
static int mov_read_close(AVFormatContext *s)
1706
{
1707
    int i, j;
1708
    MOVContext *mov = s->priv_data;
1709
    for(i=0; i<s->nb_streams; i++) {
1710
        MOVStreamContext *sc = s->streams[i]->priv_data;
1711
        av_freep(&sc->ctts_data);
1712
        for (j=0; j<sc->drefs_count; j++)
1713
            av_freep(&sc->drefs[j].path);
1714
        av_freep(&sc->drefs);
1715
        if (sc->pb && sc->pb != s->pb)
1716
            url_fclose(sc->pb);
1717
    }
1718
    if(mov->dv_demux){
1719
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1720
            av_freep(&mov->dv_fctx->streams[i]->codec);
1721
            av_freep(&mov->dv_fctx->streams[i]);
1722
        }
1723
        av_freep(&mov->dv_fctx);
1724
        av_freep(&mov->dv_demux);
1725
    }
1726
    return 0;
1727
}
1728

    
1729
AVInputFormat mov_demuxer = {
1730
    "mov,mp4,m4a,3gp,3g2,mj2",
1731
    "QuickTime/MPEG4/Motion JPEG 2000 format",
1732
    sizeof(MOVContext),
1733
    mov_probe,
1734
    mov_read_header,
1735
    mov_read_packet,
1736
    mov_read_close,
1737
    mov_read_seek,
1738
};