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ffmpeg / libavformat / mov.c @ 37ffe34b

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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
9
 * 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
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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"
27
#include "riff.h"
28
#include "isom.h"
29
#include "dv.h"
30

    
31
#ifdef CONFIG_ZLIB
32
#include <zlib.h>
33
#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),
41
 *   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/
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;
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    int64_t size; /* total size (excluding the size and type fields) */
81
} MOV_atom_t;
82

    
83
struct MOVParseTableEntry;
84

    
85
typedef struct {
86
    unsigned track_id;
87
    uint64_t base_data_offset;
88
    uint64_t moof_offset;
89
    unsigned stsd_id;
90
    unsigned duration;
91
    unsigned size;
92
    unsigned flags;
93
} MOVFragment;
94

    
95
typedef struct {
96
    unsigned track_id;
97
    unsigned stsd_id;
98
    unsigned duration;
99
    unsigned size;
100
    unsigned flags;
101
} MOVTrackExt;
102

    
103
typedef struct MOVStreamContext {
104
    ByteIOContext *pb;
105
    int ffindex; /* the ffmpeg stream id */
106
    int next_chunk;
107
    unsigned int chunk_count;
108
    int64_t *chunk_offsets;
109
    unsigned int stts_count;
110
    MOV_stts_t *stts_data;
111
    unsigned int ctts_count;
112
    MOV_stts_t *ctts_data;
113
    unsigned int edit_count; /* number of 'edit' (elst atom) */
114
    unsigned int sample_to_chunk_sz;
115
    MOV_stsc_t *sample_to_chunk;
116
    int sample_to_ctime_index;
117
    int sample_to_ctime_sample;
118
    unsigned int sample_size;
119
    unsigned int sample_count;
120
    int *sample_sizes;
121
    unsigned int keyframe_count;
122
    int *keyframes;
123
    int time_scale;
124
    int time_rate;
125
    int current_sample;
126
    unsigned int bytes_per_frame;
127
    unsigned int samples_per_frame;
128
    int dv_audio_container;
129
    int pseudo_stream_id;
130
    int16_t audio_cid; ///< stsd audio compression id
131
    unsigned drefs_count;
132
    MOV_dref_t *drefs;
133
    int dref_id;
134
} MOVStreamContext;
135

    
136
typedef struct MOVContext {
137
    AVFormatContext *fc;
138
    int time_scale;
139
    int64_t duration; /* duration of the longest track */
140
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
141
    int found_mdat; /* we suppose we have enough data to read the file */
142
    AVPaletteControl palette_control;
143
    DVDemuxContext *dv_demux;
144
    AVFormatContext *dv_fctx;
145
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
146
    MOVFragment fragment; ///< current fragment in moof atom
147
    MOVTrackExt *trex_data;
148
    unsigned trex_count;
149
} MOVContext;
150

    
151

    
152
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
153

    
154
/* those functions parse an atom */
155
/* return code:
156
  1: found what I wanted, exit
157
  0: continue to parse next atom
158
 <0: error occurred, exit
159
*/
160
/* links atom IDs to parse functions */
161
typedef struct MOVParseTableEntry {
162
    uint32_t type;
163
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
164
} MOVParseTableEntry;
165

    
166
static const MOVParseTableEntry mov_default_parse_table[];
167

    
168
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
169
{
170
    int64_t total_size = 0;
171
    MOV_atom_t a;
172
    int i;
173
    int err = 0;
174

    
175
    a.offset = atom.offset;
176

    
177
    if (atom.size < 0)
178
        atom.size = INT64_MAX;
179
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
180
        a.size = atom.size;
181
        a.type=0;
182
        if(atom.size >= 8) {
183
            a.size = get_be32(pb);
184
            a.type = get_le32(pb);
185
        }
186
        total_size += 8;
187
        a.offset += 8;
188
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
189
                a.type, (char*)&a.type, a.size, atom.size, total_size);
190
        if (a.size == 1) { /* 64 bit extended size */
191
            a.size = get_be64(pb) - 8;
192
            a.offset += 8;
193
            total_size += 8;
194
        }
195
        if (a.size == 0) {
196
            a.size = atom.size - total_size;
197
            if (a.size <= 8)
198
                break;
199
        }
200
        a.size -= 8;
201
        if(a.size < 0)
202
            break;
203
        a.size = FFMIN(a.size, atom.size - total_size);
204

    
205
        for (i = 0; mov_default_parse_table[i].type != 0
206
             && mov_default_parse_table[i].type != a.type; i++)
207
            /* empty */;
208

    
209
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
210
            url_fskip(pb, a.size);
211
        } else {
212
            offset_t start_pos = url_ftell(pb);
213
            int64_t left;
214
            err = mov_default_parse_table[i].parse(c, pb, a);
215
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
216
                break;
217
            left = a.size - url_ftell(pb) + start_pos;
218
            if (left > 0) /* skip garbage at atom end */
219
                url_fskip(pb, left);
220
        }
221

    
222
        a.offset += a.size;
223
        total_size += a.size;
224
    }
225

    
226
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
227
        url_fskip(pb, atom.size - total_size);
228

    
229
    return err;
230
}
231

    
232
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
233
{
234
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
235
    MOVStreamContext *sc = st->priv_data;
236
    int entries, i, j;
237

    
238
    get_be32(pb); // version + flags
239
    entries = get_be32(pb);
240
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
241
        return -1;
242
    sc->drefs_count = entries;
243
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
244

    
245
    for (i = 0; i < sc->drefs_count; i++) {
246
        MOV_dref_t *dref = &sc->drefs[i];
247
        uint32_t size = get_be32(pb);
248
        offset_t next = url_ftell(pb) + size - 4;
249

    
250
        dref->type = get_le32(pb);
251
        get_be32(pb); // version + flags
252
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
253

    
254
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
255
            /* macintosh alias record */
256
            uint16_t volume_len, len;
257
            char volume[28];
258
            int16_t type;
259

    
260
            url_fskip(pb, 10);
261

    
262
            volume_len = get_byte(pb);
263
            volume_len = FFMIN(volume_len, 27);
264
            get_buffer(pb, volume, 27);
265
            volume[volume_len] = 0;
266
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
267

    
268
            url_fskip(pb, 112);
269

    
270
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
271
                type = get_be16(pb);
272
                len = get_be16(pb);
273
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
274
                if (len&1)
275
                    len += 1;
276
                if (type == 2) { // absolute path
277
                    av_free(dref->path);
278
                    dref->path = av_mallocz(len+1);
279
                    if (!dref->path)
280
                        return AVERROR(ENOMEM);
281
                    get_buffer(pb, dref->path, len);
282
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
283
                        len -= volume_len;
284
                        memmove(dref->path, dref->path+volume_len, len);
285
                        dref->path[len] = 0;
286
                    }
287
                    for (j = 0; j < len; j++)
288
                        if (dref->path[j] == ':')
289
                            dref->path[j] = '/';
290
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
291
                } else
292
                    url_fskip(pb, len);
293
            }
294
        }
295
        url_fseek(pb, next, SEEK_SET);
296
    }
297
    return 0;
298
}
299

    
300
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
301
{
302
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
303
    uint32_t type;
304
    uint32_t ctype;
305

    
306
    get_byte(pb); /* version */
307
    get_be24(pb); /* flags */
308

    
309
    /* component type */
310
    ctype = get_le32(pb);
311
    type = get_le32(pb); /* component subtype */
312

    
313
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
314
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
315
    dprintf(c->fc, "stype= %c%c%c%c\n",
316
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
317
    if(!ctype)
318
        c->isom = 1;
319
    if     (type == MKTAG('v','i','d','e'))
320
        st->codec->codec_type = CODEC_TYPE_VIDEO;
321
    else if(type == MKTAG('s','o','u','n'))
322
        st->codec->codec_type = CODEC_TYPE_AUDIO;
323
    else if(type == MKTAG('m','1','a',' '))
324
        st->codec->codec_id = CODEC_ID_MP2;
325
    else if(type == MKTAG('s','u','b','p')) {
326
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
327
    }
328
    get_be32(pb); /* component  manufacture */
329
    get_be32(pb); /* component flags */
330
    get_be32(pb); /* component flags mask */
331

    
332
    if(atom.size <= 24)
333
        return 0; /* nothing left to read */
334

    
335
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
336
    return 0;
337
}
338

    
339
static int mp4_read_descr_len(ByteIOContext *pb)
340
{
341
    int len = 0;
342
    int count = 4;
343
    while (count--) {
344
        int c = get_byte(pb);
345
        len = (len << 7) | (c & 0x7f);
346
        if (!(c & 0x80))
347
            break;
348
    }
349
    return len;
350
}
351

    
352
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
353
{
354
    int len;
355
    *tag = get_byte(pb);
356
    len = mp4_read_descr_len(pb);
357
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
358
    return len;
359
}
360

    
361
#define MP4ESDescrTag                   0x03
362
#define MP4DecConfigDescrTag            0x04
363
#define MP4DecSpecificDescrTag          0x05
364

    
365
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
366
{
367
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
368
    int tag, len;
369

    
370
    get_be32(pb); /* version + flags */
371
    len = mp4_read_descr(c, pb, &tag);
372
    if (tag == MP4ESDescrTag) {
373
        get_be16(pb); /* ID */
374
        get_byte(pb); /* priority */
375
    } else
376
        get_be16(pb); /* ID */
377

    
378
    len = mp4_read_descr(c, pb, &tag);
379
    if (tag == MP4DecConfigDescrTag) {
380
        int object_type_id = get_byte(pb);
381
        get_byte(pb); /* stream type */
382
        get_be24(pb); /* buffer size db */
383
        get_be32(pb); /* max bitrate */
384
        get_be32(pb); /* avg bitrate */
385

    
386
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
387
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
388
        len = mp4_read_descr(c, pb, &tag);
389
        if (tag == MP4DecSpecificDescrTag) {
390
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
391
            if((uint64_t)len > (1<<30))
392
                return -1;
393
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
394
            if (!st->codec->extradata)
395
                return AVERROR(ENOMEM);
396
            get_buffer(pb, st->codec->extradata, len);
397
            st->codec->extradata_size = len;
398
            /* from mplayer */
399
            if ((*st->codec->extradata >> 3) == 29) {
400
                st->codec->codec_id = CODEC_ID_MP3ON4;
401
            }
402
        }
403
    }
404
    return 0;
405
}
406

    
407
/* this atom contains actual media data */
408
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
409
{
410
    if(atom.size == 0) /* wrong one (MP4) */
411
        return 0;
412
    c->found_mdat=1;
413
    return 0; /* now go for moov */
414
}
415

    
416
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
417
{
418
    uint32_t type = get_le32(pb);
419

    
420
    if (type != MKTAG('q','t',' ',' '))
421
        c->isom = 1;
422
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
423
    get_be32(pb); /* minor version */
424
    url_fskip(pb, atom.size - 8);
425
    return 0;
426
}
427

    
428
/* this atom should contain all header atoms */
429
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
430
{
431
    if (mov_read_default(c, pb, atom) < 0)
432
        return -1;
433
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
434
    /* so we don't parse the whole file if over a network */
435
    c->found_moov=1;
436
    return 0; /* now go for mdat */
437
}
438

    
439
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
440
{
441
    c->fragment.moof_offset = url_ftell(pb) - 8;
442
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
443
    return mov_read_default(c, pb, atom);
444
}
445

    
446
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
447
{
448
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
449
    MOVStreamContext *sc = st->priv_data;
450
    int version = get_byte(pb);
451
    int lang;
452

    
453
    if (version > 1)
454
        return 1; /* unsupported */
455

    
456
    get_be24(pb); /* flags */
457
    if (version == 1) {
458
        get_be64(pb);
459
        get_be64(pb);
460
    } else {
461
        get_be32(pb); /* creation time */
462
        get_be32(pb); /* modification time */
463
    }
464

    
465
    sc->time_scale = get_be32(pb);
466
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
467

    
468
    lang = get_be16(pb); /* language */
469
    ff_mov_lang_to_iso639(lang, st->language);
470
    get_be16(pb); /* quality */
471

    
472
    return 0;
473
}
474

    
475
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
476
{
477
    int version = get_byte(pb); /* version */
478
    get_be24(pb); /* flags */
479

    
480
    if (version == 1) {
481
        get_be64(pb);
482
        get_be64(pb);
483
    } else {
484
        get_be32(pb); /* creation time */
485
        get_be32(pb); /* modification time */
486
    }
487
    c->time_scale = get_be32(pb); /* time scale */
488

    
489
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
490

    
491
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
492
    get_be32(pb); /* preferred scale */
493

    
494
    get_be16(pb); /* preferred volume */
495

    
496
    url_fskip(pb, 10); /* reserved */
497

    
498
    url_fskip(pb, 36); /* display matrix */
499

    
500
    get_be32(pb); /* preview time */
501
    get_be32(pb); /* preview duration */
502
    get_be32(pb); /* poster time */
503
    get_be32(pb); /* selection time */
504
    get_be32(pb); /* selection duration */
505
    get_be32(pb); /* current time */
506
    get_be32(pb); /* next track ID */
507

    
508
    return 0;
509
}
510

    
511
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
512
{
513
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
514

    
515
    if((uint64_t)atom.size > (1<<30))
516
        return -1;
517

    
518
    // currently SVQ3 decoder expect full STSD header - so let's fake it
519
    // this should be fixed and just SMI header should be passed
520
    av_free(st->codec->extradata);
521
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
522
    if (!st->codec->extradata)
523
        return AVERROR(ENOMEM);
524
    st->codec->extradata_size = 0x5a + atom.size;
525
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
526
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
527
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
528
    return 0;
529
}
530

    
531
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
532
{
533
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
534
    int little_endian = get_be16(pb);
535

    
536
    if (little_endian) {
537
        switch (st->codec->codec_id) {
538
        case CODEC_ID_PCM_S24BE:
539
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
540
            break;
541
        case CODEC_ID_PCM_S32BE:
542
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
543
            break;
544
        default:
545
            break;
546
        }
547
    }
548
    return 0;
549
}
550

    
551
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
552
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
553
{
554
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
555
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
556
    uint8_t *buf;
557
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
558
        return -1;
559
    buf= av_realloc(st->codec->extradata, size);
560
    if(!buf)
561
        return -1;
562
    st->codec->extradata= buf;
563
    buf+= st->codec->extradata_size;
564
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
565
    AV_WB32(       buf    , atom.size + 8);
566
    AV_WL32(       buf + 4, atom.type);
567
    get_buffer(pb, buf + 8, atom.size);
568
    return 0;
569
}
570

    
571
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
572
{
573
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
574

    
575
    if((uint64_t)atom.size > (1<<30))
576
        return -1;
577

    
578
    if (st->codec->codec_id == CODEC_ID_QDM2) {
579
        // pass all frma atom to codec, needed at least for QDM2
580
        av_free(st->codec->extradata);
581
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
582
        if (!st->codec->extradata)
583
            return AVERROR(ENOMEM);
584
        st->codec->extradata_size = atom.size;
585
        get_buffer(pb, st->codec->extradata, atom.size);
586
    } else if (atom.size > 8) { /* to read frma, esds atoms */
587
        if (mov_read_default(c, pb, atom) < 0)
588
            return -1;
589
    } else
590
        url_fskip(pb, atom.size);
591
    return 0;
592
}
593

    
594
/**
595
 * This function reads atom content and puts data in extradata without tag
596
 * nor size unlike mov_read_extradata.
597
 */
598
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
599
{
600
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
601

    
602
    if((uint64_t)atom.size > (1<<30))
603
        return -1;
604

    
605
    av_free(st->codec->extradata);
606
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
607
    if (!st->codec->extradata)
608
        return AVERROR(ENOMEM);
609
    st->codec->extradata_size = atom.size;
610
    get_buffer(pb, st->codec->extradata, atom.size);
611
    return 0;
612
}
613

    
614
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
615
{
616
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
617
    MOVStreamContext *sc = st->priv_data;
618
    unsigned int i, entries;
619

    
620
    get_byte(pb); /* version */
621
    get_be24(pb); /* flags */
622

    
623
    entries = get_be32(pb);
624

    
625
    if(entries >= UINT_MAX/sizeof(int64_t))
626
        return -1;
627

    
628
    sc->chunk_count = entries;
629
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
630
    if (!sc->chunk_offsets)
631
        return -1;
632
    if      (atom.type == MKTAG('s','t','c','o'))
633
        for(i=0; i<entries; i++)
634
            sc->chunk_offsets[i] = get_be32(pb);
635
    else if (atom.type == MKTAG('c','o','6','4'))
636
        for(i=0; i<entries; i++)
637
            sc->chunk_offsets[i] = get_be64(pb);
638
    else
639
        return -1;
640

    
641
    return 0;
642
}
643

    
644
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
645
{
646
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
647
    MOVStreamContext *sc = st->priv_data;
648
    int entries, frames_per_sample;
649
    uint32_t format;
650
    uint8_t codec_name[32];
651

    
652
    /* for palette traversal */
653
    unsigned int color_depth;
654
    unsigned int color_start;
655
    unsigned int color_count;
656
    unsigned int color_end;
657
    int color_index;
658
    int color_dec;
659
    int color_greyscale;
660
    const uint8_t *color_table;
661
    int j, pseudo_stream_id;
662
    unsigned char r, g, b;
663

    
664
    get_byte(pb); /* version */
665
    get_be24(pb); /* flags */
666

    
667
    entries = get_be32(pb);
668

    
669
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
670
        //Parsing Sample description table
671
        enum CodecID id;
672
        int dref_id;
673
        MOV_atom_t a = { 0, 0, 0 };
674
        offset_t start_pos = url_ftell(pb);
675
        int size = get_be32(pb); /* size */
676
        format = get_le32(pb); /* data format */
677

    
678
        get_be32(pb); /* reserved */
679
        get_be16(pb); /* reserved */
680
        dref_id = get_be16(pb);
681

    
682
        if (st->codec->codec_tag &&
683
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
684
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
685
           ){
686
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
687
             * export it as a separate AVStream but this needs a few changes
688
             * in the MOV demuxer, patch welcome. */
689
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
690
            continue;
691
        }
692
        sc->pseudo_stream_id= pseudo_stream_id;
693
        sc->dref_id= dref_id;
694

    
695
        st->codec->codec_tag = format;
696
        id = codec_get_id(codec_movaudio_tags, format);
697
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
698
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
699

    
700
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
701
            st->codec->codec_type = CODEC_TYPE_AUDIO;
702
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
703
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
704
            id = codec_get_id(codec_movvideo_tags, format);
705
            if (id <= 0)
706
                id = codec_get_id(codec_bmp_tags, format);
707
            if (id > 0)
708
                st->codec->codec_type = CODEC_TYPE_VIDEO;
709
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
710
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
711
                if(id > 0)
712
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
713
            }
714
        }
715

    
716
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
717
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
718
                (format >> 24) & 0xff, st->codec->codec_type);
719

    
720
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
721
            st->codec->codec_id = id;
722
            get_be16(pb); /* version */
723
            get_be16(pb); /* revision level */
724
            get_be32(pb); /* vendor */
725
            get_be32(pb); /* temporal quality */
726
            get_be32(pb); /* spatial quality */
727

    
728
            st->codec->width = get_be16(pb); /* width */
729
            st->codec->height = get_be16(pb); /* height */
730

    
731
            get_be32(pb); /* horiz resolution */
732
            get_be32(pb); /* vert resolution */
733
            get_be32(pb); /* data size, always 0 */
734
            frames_per_sample = get_be16(pb); /* frames per samples */
735

    
736
            dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);
737

    
738
            get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
739
            if (codec_name[0] <= 31) {
740
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
741
                st->codec->codec_name[codec_name[0]] = 0;
742
            }
743

    
744
            st->codec->bits_per_sample = get_be16(pb); /* depth */
745
            st->codec->color_table_id = get_be16(pb); /* colortable id */
746
            dprintf(c->fc, "depth %d, ctab id %d\n",
747
                   st->codec->bits_per_sample, st->codec->color_table_id);
748
            /* figure out the palette situation */
749
            color_depth = st->codec->bits_per_sample & 0x1F;
750
            color_greyscale = st->codec->bits_per_sample & 0x20;
751

    
752
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
753
            if ((color_depth == 2) || (color_depth == 4) ||
754
                (color_depth == 8)) {
755
                if (color_greyscale) {
756
                    /* compute the greyscale palette */
757
                    st->codec->bits_per_sample = color_depth;
758
                    color_count = 1 << color_depth;
759
                    color_index = 255;
760
                    color_dec = 256 / (color_count - 1);
761
                    for (j = 0; j < color_count; j++) {
762
                        r = g = b = color_index;
763
                        c->palette_control.palette[j] =
764
                            (r << 16) | (g << 8) | (b);
765
                        color_index -= color_dec;
766
                        if (color_index < 0)
767
                            color_index = 0;
768
                    }
769
                } else if (st->codec->color_table_id) {
770
                    /* if flag bit 3 is set, use the default palette */
771
                    color_count = 1 << color_depth;
772
                    if (color_depth == 2)
773
                        color_table = ff_qt_default_palette_4;
774
                    else if (color_depth == 4)
775
                        color_table = ff_qt_default_palette_16;
776
                    else
777
                        color_table = ff_qt_default_palette_256;
778

    
779
                    for (j = 0; j < color_count; j++) {
780
                        r = color_table[j * 4 + 0];
781
                        g = color_table[j * 4 + 1];
782
                        b = color_table[j * 4 + 2];
783
                        c->palette_control.palette[j] =
784
                            (r << 16) | (g << 8) | (b);
785
                    }
786
                } else {
787
                    /* load the palette from the file */
788
                    color_start = get_be32(pb);
789
                    color_count = get_be16(pb);
790
                    color_end = get_be16(pb);
791
                    if ((color_start <= 255) &&
792
                        (color_end <= 255)) {
793
                        for (j = color_start; j <= color_end; j++) {
794
                            /* each R, G, or B component is 16 bits;
795
                             * only use the top 8 bits; skip alpha bytes
796
                             * up front */
797
                            get_byte(pb);
798
                            get_byte(pb);
799
                            r = get_byte(pb);
800
                            get_byte(pb);
801
                            g = get_byte(pb);
802
                            get_byte(pb);
803
                            b = get_byte(pb);
804
                            get_byte(pb);
805
                            c->palette_control.palette[j] =
806
                                (r << 16) | (g << 8) | (b);
807
                        }
808
                    }
809
                }
810
                st->codec->palctrl = &c->palette_control;
811
                st->codec->palctrl->palette_changed = 1;
812
            } else
813
                st->codec->palctrl = NULL;
814
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
815
            int bits_per_sample;
816
            uint16_t version = get_be16(pb);
817

    
818
            st->codec->codec_id = id;
819
            get_be16(pb); /* revision level */
820
            get_be32(pb); /* vendor */
821

    
822
            st->codec->channels = get_be16(pb);             /* channel count */
823
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
824
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
825

    
826
            sc->audio_cid = get_be16(pb);
827
            get_be16(pb); /* packet size = 0 */
828

    
829
            st->codec->sample_rate = ((get_be32(pb) >> 16));
830

    
831
            switch (st->codec->codec_id) {
832
            case CODEC_ID_PCM_S8:
833
            case CODEC_ID_PCM_U8:
834
                if (st->codec->bits_per_sample == 16)
835
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
836
                break;
837
            case CODEC_ID_PCM_S16LE:
838
            case CODEC_ID_PCM_S16BE:
839
                if (st->codec->bits_per_sample == 8)
840
                    st->codec->codec_id = CODEC_ID_PCM_S8;
841
                else if (st->codec->bits_per_sample == 24)
842
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
843
                break;
844
            /* set values for old format before stsd version 1 appeared */
845
            case CODEC_ID_MACE3:
846
                sc->samples_per_frame = 6;
847
                sc->bytes_per_frame = 2*st->codec->channels;
848
                break;
849
            case CODEC_ID_MACE6:
850
                sc->samples_per_frame = 6;
851
                sc->bytes_per_frame = 1*st->codec->channels;
852
                break;
853
            case CODEC_ID_ADPCM_IMA_QT:
854
                sc->samples_per_frame = 64;
855
                sc->bytes_per_frame = 34*st->codec->channels;
856
                break;
857
            case CODEC_ID_GSM:
858
                sc->samples_per_frame = 160;
859
                sc->bytes_per_frame = 33;
860
                break;
861
            default:
862
                break;
863
            }
864

    
865
            //Read QT version 1 fields. In version 0 these do not exist.
866
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
867
            if(!c->isom) {
868
                if(version==1) {
869
                    sc->samples_per_frame = get_be32(pb);
870
                    get_be32(pb); /* bytes per packet */
871
                    sc->bytes_per_frame = get_be32(pb);
872
                    get_be32(pb); /* bytes per sample */
873
                } else if(version==2) {
874
                    get_be32(pb); /* sizeof struct only */
875
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
876
                    st->codec->channels = get_be32(pb);
877
                    get_be32(pb); /* always 0x7F000000 */
878
                    get_be32(pb); /* bits per channel if sound is uncompressed */
879
                    get_be32(pb); /* lcpm format specific flag */
880
                    get_be32(pb); /* bytes per audio packet if constant */
881
                    get_be32(pb); /* lpcm frames per audio packet if constant */
882
                }
883
            }
884

    
885
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
886
            if (bits_per_sample) {
887
                st->codec->bits_per_sample = bits_per_sample;
888
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
889
            }
890
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
891
            st->codec->codec_id= id;
892
        } else {
893
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
894
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
895
        }
896
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
897
        a.size = size - (url_ftell(pb) - start_pos);
898
        if (a.size > 8) {
899
            if (mov_read_default(c, pb, a) < 0)
900
                return -1;
901
        } else if (a.size > 0)
902
            url_fskip(pb, a.size);
903
    }
904

    
905
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
906
        st->codec->sample_rate= sc->time_scale;
907

    
908
    /* special codec parameters handling */
909
    switch (st->codec->codec_id) {
910
#ifdef CONFIG_DV_DEMUXER
911
    case CODEC_ID_DVAUDIO:
912
        c->dv_fctx = av_alloc_format_context();
913
        c->dv_demux = dv_init_demux(c->dv_fctx);
914
        if (!c->dv_demux) {
915
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
916
            return -1;
917
        }
918
        sc->dv_audio_container = 1;
919
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
920
        break;
921
#endif
922
    /* no ifdef since parameters are always those */
923
    case CODEC_ID_AMR_WB:
924
        st->codec->sample_rate= 16000;
925
        st->codec->channels= 1; /* really needed */
926
        break;
927
    case CODEC_ID_QCELP:
928
        st->codec->frame_size = sc->samples_per_frame;
929
        st->need_parsing= AVSTREAM_PARSE_FULL;
930
    case CODEC_ID_AMR_NB:
931
        st->codec->sample_rate= 8000;
932
        st->codec->channels= 1; /* really needed */
933
        break;
934
    case CODEC_ID_MP2:
935
    case CODEC_ID_MP3:
936
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
937
        st->need_parsing = AVSTREAM_PARSE_FULL;
938
        break;
939
    case CODEC_ID_GSM:
940
    case CODEC_ID_ADPCM_MS:
941
    case CODEC_ID_ADPCM_IMA_WAV:
942
        st->codec->block_align = sc->bytes_per_frame;
943
        break;
944
    case CODEC_ID_ALAC:
945
        if (st->codec->extradata_size == 36)
946
            st->codec->frame_size = AV_RB32((st->codec->extradata+12));
947
        break;
948
    default:
949
        break;
950
    }
951

    
952
    return 0;
953
}
954

    
955
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
956
{
957
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
958
    MOVStreamContext *sc = st->priv_data;
959
    unsigned int i, entries;
960

    
961
    get_byte(pb); /* version */
962
    get_be24(pb); /* flags */
963

    
964
    entries = get_be32(pb);
965

    
966
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
967
        return -1;
968

    
969
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
970

    
971
    sc->sample_to_chunk_sz = entries;
972
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
973
    if (!sc->sample_to_chunk)
974
        return -1;
975
    for(i=0; i<entries; i++) {
976
        sc->sample_to_chunk[i].first = get_be32(pb);
977
        sc->sample_to_chunk[i].count = get_be32(pb);
978
        sc->sample_to_chunk[i].id = get_be32(pb);
979
    }
980
    return 0;
981
}
982

    
983
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
984
{
985
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
986
    MOVStreamContext *sc = st->priv_data;
987
    unsigned int i, entries;
988

    
989
    get_byte(pb); /* version */
990
    get_be24(pb); /* flags */
991

    
992
    entries = get_be32(pb);
993

    
994
    if(entries >= UINT_MAX / sizeof(int))
995
        return -1;
996

    
997
    sc->keyframe_count = entries;
998

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

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

    
1011
static int mov_read_stsz(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, sample_size;
1016

    
1017
    get_byte(pb); /* version */
1018
    get_be24(pb); /* flags */
1019

    
1020
    sample_size = get_be32(pb);
1021
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1022
        sc->sample_size = sample_size;
1023
    entries = get_be32(pb);
1024
    if(entries >= UINT_MAX / sizeof(int))
1025
        return -1;
1026

    
1027
    sc->sample_count = entries;
1028
    if (sample_size)
1029
        return 0;
1030

    
1031
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1032

    
1033
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1034
    if (!sc->sample_sizes)
1035
        return -1;
1036
    for(i=0; i<entries; i++)
1037
        sc->sample_sizes[i] = get_be32(pb);
1038
    return 0;
1039
}
1040

    
1041
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1042
{
1043
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1044
    MOVStreamContext *sc = st->priv_data;
1045
    unsigned int i, entries;
1046
    int64_t duration=0;
1047
    int64_t total_sample_count=0;
1048

    
1049
    get_byte(pb); /* version */
1050
    get_be24(pb); /* flags */
1051
    entries = get_be32(pb);
1052
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1053
        return -1;
1054

    
1055
    sc->stts_count = entries;
1056
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1057
    if (!sc->stts_data)
1058
        return -1;
1059
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1060

    
1061
    sc->time_rate=0;
1062

    
1063
    for(i=0; i<entries; i++) {
1064
        int sample_duration;
1065
        int sample_count;
1066

    
1067
        sample_count=get_be32(pb);
1068
        sample_duration = get_be32(pb);
1069
        sc->stts_data[i].count= sample_count;
1070
        sc->stts_data[i].duration= sample_duration;
1071

    
1072
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1073

    
1074
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1075

    
1076
        duration+=(int64_t)sample_duration*sample_count;
1077
        total_sample_count+=sample_count;
1078
    }
1079

    
1080
    st->nb_frames= total_sample_count;
1081
    if(duration)
1082
        st->duration= duration;
1083
    return 0;
1084
}
1085

    
1086
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1087
{
1088
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1089
    MOVStreamContext *sc = st->priv_data;
1090
    unsigned int i, entries;
1091

    
1092
    get_byte(pb); /* version */
1093
    get_be24(pb); /* flags */
1094
    entries = get_be32(pb);
1095
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1096
        return -1;
1097

    
1098
    sc->ctts_count = entries;
1099
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1100
    if (!sc->ctts_data)
1101
        return -1;
1102
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1103

    
1104
    for(i=0; i<entries; i++) {
1105
        int count    =get_be32(pb);
1106
        int duration =get_be32(pb);
1107

    
1108
        if (duration < 0) {
1109
            av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1110
            sc->ctts_count = 0;
1111
            url_fskip(pb, 8 * (entries - i - 1));
1112
            break;
1113
        }
1114
        sc->ctts_data[i].count   = count;
1115
        sc->ctts_data[i].duration= duration;
1116

    
1117
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1118
    }
1119
    return 0;
1120
}
1121

    
1122
static void mov_build_index(MOVContext *mov, AVStream *st)
1123
{
1124
    MOVStreamContext *sc = st->priv_data;
1125
    offset_t current_offset;
1126
    int64_t current_dts = 0;
1127
    unsigned int stts_index = 0;
1128
    unsigned int stsc_index = 0;
1129
    unsigned int stss_index = 0;
1130
    unsigned int i, j;
1131

    
1132
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1133
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1134
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1135
        unsigned int current_sample = 0;
1136
        unsigned int stts_sample = 0;
1137
        unsigned int keyframe, sample_size;
1138
        unsigned int distance = 0;
1139
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1140

    
1141
        st->nb_frames = sc->sample_count;
1142
        for (i = 0; i < sc->chunk_count; i++) {
1143
            current_offset = sc->chunk_offsets[i];
1144
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1145
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1146
                stsc_index++;
1147
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1148
                if (current_sample >= sc->sample_count) {
1149
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1150
                    goto out;
1151
                }
1152
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1153
                if (keyframe) {
1154
                    distance = 0;
1155
                    if (stss_index + 1 < sc->keyframe_count)
1156
                        stss_index++;
1157
                }
1158
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1159
                dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1160
                        "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1161
                        current_offset, current_dts, sample_size, distance, keyframe);
1162
                if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)
1163
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1164
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1165
                current_offset += sample_size;
1166
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1167
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1168
                distance++;
1169
                stts_sample++;
1170
                current_sample++;
1171
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1172
                    stts_sample = 0;
1173
                    stts_index++;
1174
                }
1175
            }
1176
        }
1177
    } else { /* read whole chunk */
1178
        unsigned int chunk_samples, chunk_size, chunk_duration;
1179
        unsigned int frames = 1;
1180
        for (i = 0; i < sc->chunk_count; i++) {
1181
            current_offset = sc->chunk_offsets[i];
1182
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1183
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1184
                stsc_index++;
1185
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1186
            /* get chunk size, beware of alaw/ulaw/mace */
1187
            if (sc->samples_per_frame > 0 &&
1188
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1189
                if (sc->samples_per_frame < 1024)
1190
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1191
                else {
1192
                    chunk_size = sc->bytes_per_frame;
1193
                    frames = chunk_samples / sc->samples_per_frame;
1194
                    chunk_samples = sc->samples_per_frame;
1195
                }
1196
            } else
1197
                chunk_size = chunk_samples * sc->sample_size;
1198
            for (j = 0; j < frames; j++) {
1199
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1200
                /* get chunk duration */
1201
                chunk_duration = 0;
1202
                while (chunk_samples > 0) {
1203
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1204
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1205
                        sc->stts_data[stts_index].count -= chunk_samples;
1206
                        break;
1207
                    } else {
1208
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1209
                        chunk_samples -= sc->stts_data[stts_index].count;
1210
                        if (stts_index + 1 < sc->stts_count)
1211
                            stts_index++;
1212
                    }
1213
                }
1214
                current_offset += sc->bytes_per_frame;
1215
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1216
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1217
                        chunk_size, chunk_duration);
1218
                assert(chunk_duration % sc->time_rate == 0);
1219
                current_dts += chunk_duration / sc->time_rate;
1220
            }
1221
        }
1222
    }
1223
 out:
1224
    /* adjust sample count to avindex entries */
1225
    sc->sample_count = st->nb_index_entries;
1226
}
1227

    
1228
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1229
{
1230
    AVStream *st;
1231
    MOVStreamContext *sc;
1232
    int ret;
1233

    
1234
    st = av_new_stream(c->fc, c->fc->nb_streams);
1235
    if (!st) return AVERROR(ENOMEM);
1236
    sc = av_mallocz(sizeof(MOVStreamContext));
1237
    if (!sc) return AVERROR(ENOMEM);
1238

    
1239
    st->priv_data = sc;
1240
    st->codec->codec_type = CODEC_TYPE_DATA;
1241
    st->start_time = 0; /* XXX: check */
1242

    
1243
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1244
        return ret;
1245

    
1246
    /* sanity checks */
1247
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1248
                           (!sc->sample_size && !sc->sample_count))){
1249
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1250
               st->index);
1251
        sc->sample_count = 0; //ignore track
1252
        return 0;
1253
    }
1254
    if(!sc->time_rate)
1255
        sc->time_rate=1;
1256
    if(!sc->time_scale)
1257
        sc->time_scale= c->time_scale;
1258
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1259

    
1260
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1261
        !st->codec->frame_size && sc->stts_count == 1)
1262
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1263

    
1264
    if(st->duration != AV_NOPTS_VALUE){
1265
        assert(st->duration % sc->time_rate == 0);
1266
        st->duration /= sc->time_rate;
1267
    }
1268
    sc->ffindex = st->index;
1269
    mov_build_index(c, st);
1270

    
1271
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1272
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1273
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1274
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1275
    } else
1276
        sc->pb = c->fc->pb;
1277

    
1278
    switch (st->codec->codec_id) {
1279
#ifdef CONFIG_H261_DECODER
1280
    case CODEC_ID_H261:
1281
#endif
1282
#ifdef CONFIG_H263_DECODER
1283
    case CODEC_ID_H263:
1284
#endif
1285
#ifdef CONFIG_MPEG4_DECODER
1286
    case CODEC_ID_MPEG4:
1287
#endif
1288
        st->codec->width= 0; /* let decoder init width/height */
1289
        st->codec->height= 0;
1290
        break;
1291
#ifdef CONFIG_LIBFAAD
1292
    case CODEC_ID_AAC:
1293
#endif
1294
#ifdef CONFIG_VORBIS_DECODER
1295
    case CODEC_ID_VORBIS:
1296
#endif
1297
    case CODEC_ID_MP3ON4:
1298
        st->codec->sample_rate= 0; /* let decoder init parameters properly */
1299
        break;
1300
    }
1301

    
1302
    /* Do not need those anymore. */
1303
    av_freep(&sc->chunk_offsets);
1304
    av_freep(&sc->sample_to_chunk);
1305
    av_freep(&sc->sample_sizes);
1306
    av_freep(&sc->keyframes);
1307
    av_freep(&sc->stts_data);
1308

    
1309
    return 0;
1310
}
1311

    
1312
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1313
{
1314
    uint16_t str_size = get_be16(pb); /* string length */;
1315

    
1316
    get_be16(pb); /* skip language */
1317
    get_buffer(pb, str, FFMIN(size, str_size));
1318
}
1319

    
1320
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1321
{
1322
    uint64_t end = url_ftell(pb) + atom.size;
1323

    
1324
    while (url_ftell(pb) + 8 < end) {
1325
        uint32_t tag_size = get_be32(pb);
1326
        uint32_t tag      = get_le32(pb);
1327
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1328

    
1329
        if (next > end) // stop if tag_size is wrong
1330
            break;
1331

    
1332
        switch (tag) {
1333
        case MKTAG(0xa9,'n','a','m'):
1334
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1335
            break;
1336
        case MKTAG(0xa9,'w','r','t'):
1337
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1338
            break;
1339
        case MKTAG(0xa9,'c','p','y'):
1340
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1341
            break;
1342
        case MKTAG(0xa9,'i','n','f'):
1343
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1344
            break;
1345
        default:
1346
            break;
1347
        }
1348

    
1349
        url_fseek(pb, next, SEEK_SET);
1350
    }
1351

    
1352
    return 0;
1353
}
1354

    
1355
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1356
{
1357
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1358
    int version = get_byte(pb);
1359

    
1360
    get_be24(pb); /* flags */
1361
    /*
1362
    MOV_TRACK_ENABLED 0x0001
1363
    MOV_TRACK_IN_MOVIE 0x0002
1364
    MOV_TRACK_IN_PREVIEW 0x0004
1365
    MOV_TRACK_IN_POSTER 0x0008
1366
    */
1367

    
1368
    if (version == 1) {
1369
        get_be64(pb);
1370
        get_be64(pb);
1371
    } else {
1372
        get_be32(pb); /* creation time */
1373
        get_be32(pb); /* modification time */
1374
    }
1375
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1376
    get_be32(pb); /* reserved */
1377
    st->start_time = 0; /* check */
1378
    /* highlevel (considering edits) duration in movie timebase */
1379
    (version == 1) ? get_be64(pb) : get_be32(pb);
1380
    get_be32(pb); /* reserved */
1381
    get_be32(pb); /* reserved */
1382

    
1383
    get_be16(pb); /* layer */
1384
    get_be16(pb); /* alternate group */
1385
    get_be16(pb); /* volume */
1386
    get_be16(pb); /* reserved */
1387

    
1388
    url_fskip(pb, 36); /* display matrix */
1389

    
1390
    /* those are fixed-point */
1391
    get_be32(pb); /* track width */
1392
    get_be32(pb); /* track height */
1393

    
1394
    return 0;
1395
}
1396

    
1397
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1398
{
1399
    MOVFragment *frag = &c->fragment;
1400
    MOVTrackExt *trex = NULL;
1401
    int flags, track_id, i;
1402

    
1403
    get_byte(pb); /* version */
1404
    flags = get_be24(pb);
1405

    
1406
    track_id = get_be32(pb);
1407
    if (!track_id || track_id > c->fc->nb_streams)
1408
        return -1;
1409
    frag->track_id = track_id;
1410
    for (i = 0; i < c->trex_count; i++)
1411
        if (c->trex_data[i].track_id == frag->track_id) {
1412
            trex = &c->trex_data[i];
1413
            break;
1414
        }
1415
    if (!trex) {
1416
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1417
        return -1;
1418
    }
1419

    
1420
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1421
    else              frag->base_data_offset = frag->moof_offset;
1422
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1423
    else              frag->stsd_id          = trex->stsd_id;
1424

    
1425
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1426
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1427
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1428
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1429
    return 0;
1430
}
1431

    
1432
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1433
{
1434
    MOVTrackExt *trex;
1435

    
1436
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1437
        return -1;
1438
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1439
    if (!c->trex_data)
1440
        return AVERROR(ENOMEM);
1441
    trex = &c->trex_data[c->trex_count++];
1442
    get_byte(pb); /* version */
1443
    get_be24(pb); /* flags */
1444
    trex->track_id = get_be32(pb);
1445
    trex->stsd_id  = get_be32(pb);
1446
    trex->duration = get_be32(pb);
1447
    trex->size     = get_be32(pb);
1448
    trex->flags    = get_be32(pb);
1449
    return 0;
1450
}
1451

    
1452
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1453
{
1454
    MOVFragment *frag = &c->fragment;
1455
    AVStream *st;
1456
    MOVStreamContext *sc;
1457
    uint64_t offset;
1458
    int64_t dts;
1459
    int data_offset = 0;
1460
    unsigned entries, first_sample_flags = frag->flags;
1461
    int flags, distance, i;
1462

    
1463
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1464
        return -1;
1465
    st = c->fc->streams[frag->track_id-1];
1466
    sc = st->priv_data;
1467
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1468
        return 0;
1469
    get_byte(pb); /* version */
1470
    flags = get_be24(pb);
1471
    entries = get_be32(pb);
1472
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1473
    if (flags & 0x001) data_offset        = get_be32(pb);
1474
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1475
    if (flags & 0x800) {
1476
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1477
            return -1;
1478
        sc->ctts_data = av_realloc(sc->ctts_data,
1479
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1480
        if (!sc->ctts_data)
1481
            return AVERROR(ENOMEM);
1482
    }
1483
    dts = st->duration;
1484
    offset = frag->base_data_offset + data_offset;
1485
    distance = 0;
1486
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1487
    for (i = 0; i < entries; i++) {
1488
        unsigned sample_size = frag->size;
1489
        int sample_flags = i ? frag->flags : first_sample_flags;
1490
        unsigned sample_duration = frag->duration;
1491
        int keyframe;
1492

    
1493
        if (flags & 0x100) sample_duration = get_be32(pb);
1494
        if (flags & 0x200) sample_size     = get_be32(pb);
1495
        if (flags & 0x400) sample_flags    = get_be32(pb);
1496
        if (flags & 0x800) {
1497
            sc->ctts_data[sc->ctts_count].count = 1;
1498
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1499
            sc->ctts_count++;
1500
        }
1501
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1502
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1503
            distance = 0;
1504
        av_add_index_entry(st, offset, dts, sample_size, distance,
1505
                           keyframe ? AVINDEX_KEYFRAME : 0);
1506
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1507
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1508
                offset, dts, sample_size, distance, keyframe);
1509
        distance++;
1510
        assert(sample_duration % sc->time_rate == 0);
1511
        dts += sample_duration / sc->time_rate;
1512
        offset += sample_size;
1513
    }
1514
    frag->moof_offset = offset;
1515
    sc->sample_count = st->nb_index_entries;
1516
    st->duration = dts;
1517
    return 0;
1518
}
1519

    
1520
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1521
/* like the files created with Adobe Premiere 5.0, for samples see */
1522
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1523
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1524
{
1525
    int err;
1526

    
1527
    if (atom.size < 8)
1528
        return 0; /* continue */
1529
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1530
        url_fskip(pb, atom.size - 4);
1531
        return 0;
1532
    }
1533
    atom.type = get_le32(pb);
1534
    atom.offset += 8;
1535
    atom.size -= 8;
1536
    if (atom.type != MKTAG('m','d','a','t')) {
1537
        url_fskip(pb, atom.size);
1538
        return 0;
1539
    }
1540
    err = mov_read_mdat(c, pb, atom);
1541
    return err;
1542
}
1543

    
1544
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1545
{
1546
#ifdef CONFIG_ZLIB
1547
    ByteIOContext ctx;
1548
    uint8_t *cmov_data;
1549
    uint8_t *moov_data; /* uncompressed data */
1550
    long cmov_len, moov_len;
1551
    int ret;
1552

    
1553
    get_be32(pb); /* dcom atom */
1554
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1555
        return -1;
1556
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1557
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1558
        return -1;
1559
    }
1560
    get_be32(pb); /* cmvd atom */
1561
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1562
        return -1;
1563
    moov_len = get_be32(pb); /* uncompressed size */
1564
    cmov_len = atom.size - 6 * 4;
1565

    
1566
    cmov_data = av_malloc(cmov_len);
1567
    if (!cmov_data)
1568
        return -1;
1569
    moov_data = av_malloc(moov_len);
1570
    if (!moov_data) {
1571
        av_free(cmov_data);
1572
        return -1;
1573
    }
1574
    get_buffer(pb, cmov_data, cmov_len);
1575
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1576
        return -1;
1577
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1578
        return -1;
1579
    atom.type = MKTAG('m','o','o','v');
1580
    atom.offset = 0;
1581
    atom.size = moov_len;
1582
#ifdef DEBUG
1583
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1584
#endif
1585
    ret = mov_read_default(c, &ctx, atom);
1586
    av_free(moov_data);
1587
    av_free(cmov_data);
1588
    return ret;
1589
#else
1590
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1591
    return -1;
1592
#endif
1593
}
1594

    
1595
/* edit list atom */
1596
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1597
{
1598
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1599
    int i, edit_count;
1600

    
1601
    get_byte(pb); /* version */
1602
    get_be24(pb); /* flags */
1603
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1604

    
1605
    for(i=0; i<edit_count; i++){
1606
        int time;
1607
        get_be32(pb); /* Track duration */
1608
        time = get_be32(pb); /* Media time */
1609
        get_be32(pb); /* Media rate */
1610
        if (time != 0)
1611
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1612
                   "a/v desync might occur, patch welcome\n");
1613
    }
1614
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1615
    return 0;
1616
}
1617

    
1618
static const MOVParseTableEntry mov_default_parse_table[] = {
1619
{ MKTAG('c','o','6','4'), mov_read_stco },
1620
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1621
{ MKTAG('d','i','n','f'), mov_read_default },
1622
{ MKTAG('d','r','e','f'), mov_read_dref },
1623
{ MKTAG('e','d','t','s'), mov_read_default },
1624
{ MKTAG('e','l','s','t'), mov_read_elst },
1625
{ MKTAG('e','n','d','a'), mov_read_enda },
1626
{ MKTAG('f','i','e','l'), mov_read_extradata },
1627
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1628
{ MKTAG('g','l','b','l'), mov_read_glbl },
1629
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1630
{ MKTAG('j','p','2','h'), mov_read_extradata },
1631
{ MKTAG('m','d','a','t'), mov_read_mdat },
1632
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1633
{ MKTAG('m','d','i','a'), mov_read_default },
1634
{ MKTAG('m','i','n','f'), mov_read_default },
1635
{ MKTAG('m','o','o','f'), mov_read_moof },
1636
{ MKTAG('m','o','o','v'), mov_read_moov },
1637
{ MKTAG('m','v','e','x'), mov_read_default },
1638
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1639
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1640
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1641
{ MKTAG('a','v','c','C'), mov_read_glbl },
1642
{ MKTAG('s','t','b','l'), mov_read_default },
1643
{ MKTAG('s','t','c','o'), mov_read_stco },
1644
{ MKTAG('s','t','s','c'), mov_read_stsc },
1645
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1646
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1647
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1648
{ MKTAG('s','t','t','s'), mov_read_stts },
1649
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1650
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1651
{ MKTAG('t','r','a','k'), mov_read_trak },
1652
{ MKTAG('t','r','a','f'), mov_read_default },
1653
{ MKTAG('t','r','e','x'), mov_read_trex },
1654
{ MKTAG('t','r','u','n'), mov_read_trun },
1655
{ MKTAG('u','d','t','a'), mov_read_udta },
1656
{ MKTAG('w','a','v','e'), mov_read_wave },
1657
{ MKTAG('e','s','d','s'), mov_read_esds },
1658
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1659
{ MKTAG('c','m','o','v'), mov_read_cmov },
1660
{ 0, NULL }
1661
};
1662

    
1663
static int mov_probe(AVProbeData *p)
1664
{
1665
    unsigned int offset;
1666
    uint32_t tag;
1667
    int score = 0;
1668

    
1669
    /* check file header */
1670
    offset = 0;
1671
    for(;;) {
1672
        /* ignore invalid offset */
1673
        if ((offset + 8) > (unsigned int)p->buf_size)
1674
            return score;
1675
        tag = AV_RL32(p->buf + offset + 4);
1676
        switch(tag) {
1677
        /* check for obvious tags */
1678
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1679
        case MKTAG('m','o','o','v'):
1680
        case MKTAG('m','d','a','t'):
1681
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1682
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1683
            return AVPROBE_SCORE_MAX;
1684
        /* those are more common words, so rate then a bit less */
1685
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1686
        case MKTAG('w','i','d','e'):
1687
        case MKTAG('f','r','e','e'):
1688
        case MKTAG('j','u','n','k'):
1689
        case MKTAG('p','i','c','t'):
1690
            return AVPROBE_SCORE_MAX - 5;
1691
        case MKTAG(0x82,0x82,0x7f,0x7d ):
1692
        case MKTAG('f','t','y','p'):
1693
        case MKTAG('s','k','i','p'):
1694
        case MKTAG('u','u','i','d'):
1695
        case MKTAG('p','r','f','l'):
1696
            offset = AV_RB32(p->buf+offset) + offset;
1697
            /* if we only find those cause probedata is too small at least rate them */
1698
            score = AVPROBE_SCORE_MAX - 50;
1699
            break;
1700
        default:
1701
            /* unrecognized tag */
1702
            return score;
1703
        }
1704
    }
1705
    return score;
1706
}
1707

    
1708
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1709
{
1710
    MOVContext *mov = s->priv_data;
1711
    ByteIOContext *pb = s->pb;
1712
    int err;
1713
    MOV_atom_t atom = { 0, 0, 0 };
1714

    
1715
    mov->fc = s;
1716
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1717
    if(!url_is_streamed(pb))
1718
        atom.size = url_fsize(pb);
1719
    else
1720
        atom.size = INT64_MAX;
1721

    
1722
    /* check MOV header */
1723
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1724
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1725
        return err;
1726
    }
1727
    if (!mov->found_moov) {
1728
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1729
        return -1;
1730
    }
1731
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1732

    
1733
    return 0;
1734
}
1735

    
1736
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1737
{
1738
    MOVContext *mov = s->priv_data;
1739
    MOVStreamContext *sc = 0;
1740
    AVIndexEntry *sample = 0;
1741
    int64_t best_dts = INT64_MAX;
1742
    int i;
1743
 retry:
1744
    for (i = 0; i < s->nb_streams; i++) {
1745
        AVStream *st = s->streams[i];
1746
        MOVStreamContext *msc = st->priv_data;
1747
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1748
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1749
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1750
                                     AV_TIME_BASE, msc->time_scale);
1751
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1752
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1753
                (!url_is_streamed(s->pb) &&
1754
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1755
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1756
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1757
                sample = current_sample;
1758
                best_dts = dts;
1759
                sc = msc;
1760
            }
1761
        }
1762
    }
1763
    if (!sample) {
1764
        mov->found_mdat = 0;
1765
        if (!url_is_streamed(s->pb) ||
1766
            mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1767
            url_feof(s->pb))
1768
            return -1;
1769
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1770
        goto retry;
1771
    }
1772
    /* must be done just before reading, to avoid infinite loop on sample */
1773
    sc->current_sample++;
1774
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1775
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1776
               sc->ffindex, sample->pos);
1777
        return -1;
1778
    }
1779
    av_get_packet(sc->pb, pkt, sample->size);
1780
#ifdef CONFIG_DV_DEMUXER
1781
    if (mov->dv_demux && sc->dv_audio_container) {
1782
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1783
        av_free(pkt->data);
1784
        pkt->size = 0;
1785
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1786
            return -1;
1787
    }
1788
#endif
1789
    pkt->stream_index = sc->ffindex;
1790
    pkt->dts = sample->timestamp;
1791
    if (sc->ctts_data) {
1792
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1793
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1794
        /* update ctts context */
1795
        sc->sample_to_ctime_sample++;
1796
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1797
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1798
            sc->sample_to_ctime_index++;
1799
            sc->sample_to_ctime_sample = 0;
1800
        }
1801
    } else {
1802
        pkt->pts = pkt->dts;
1803
    }
1804
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1805
    pkt->pos = sample->pos;
1806
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1807
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1808
    return 0;
1809
}
1810

    
1811
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1812
{
1813
    MOVStreamContext *sc = st->priv_data;
1814
    int sample, time_sample;
1815
    int i;
1816

    
1817
    sample = av_index_search_timestamp(st, timestamp, flags);
1818
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1819
    if (sample < 0) /* not sure what to do */
1820
        return -1;
1821
    sc->current_sample = sample;
1822
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1823
    /* adjust ctts index */
1824
    if (sc->ctts_data) {
1825
        time_sample = 0;
1826
        for (i = 0; i < sc->ctts_count; i++) {
1827
            int next = time_sample + sc->ctts_data[i].count;
1828
            if (next > sc->current_sample) {
1829
                sc->sample_to_ctime_index = i;
1830
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1831
                break;
1832
            }
1833
            time_sample = next;
1834
        }
1835
    }
1836
    return sample;
1837
}
1838

    
1839
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1840
{
1841
    AVStream *st;
1842
    int64_t seek_timestamp, timestamp;
1843
    int sample;
1844
    int i;
1845

    
1846
    if (stream_index >= s->nb_streams)
1847
        return -1;
1848

    
1849
    st = s->streams[stream_index];
1850
    sample = mov_seek_stream(st, sample_time, flags);
1851
    if (sample < 0)
1852
        return -1;
1853

    
1854
    /* adjust seek timestamp to found sample timestamp */
1855
    seek_timestamp = st->index_entries[sample].timestamp;
1856

    
1857
    for (i = 0; i < s->nb_streams; i++) {
1858
        st = s->streams[i];
1859
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1860
            continue;
1861

    
1862
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1863
        mov_seek_stream(st, timestamp, flags);
1864
    }
1865
    return 0;
1866
}
1867

    
1868
static int mov_read_close(AVFormatContext *s)
1869
{
1870
    int i, j;
1871
    MOVContext *mov = s->priv_data;
1872
    for(i=0; i<s->nb_streams; i++) {
1873
        MOVStreamContext *sc = s->streams[i]->priv_data;
1874
        av_freep(&sc->ctts_data);
1875
        for (j=0; j<sc->drefs_count; j++)
1876
            av_freep(&sc->drefs[j].path);
1877
        av_freep(&sc->drefs);
1878
        if (sc->pb && sc->pb != s->pb)
1879
            url_fclose(sc->pb);
1880
    }
1881
    if(mov->dv_demux){
1882
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1883
            av_freep(&mov->dv_fctx->streams[i]->codec);
1884
            av_freep(&mov->dv_fctx->streams[i]);
1885
        }
1886
        av_freep(&mov->dv_fctx);
1887
        av_freep(&mov->dv_demux);
1888
    }
1889
    av_freep(&mov->trex_data);
1890
    return 0;
1891
}
1892

    
1893
AVInputFormat mov_demuxer = {
1894
    "mov,mp4,m4a,3gp,3g2,mj2",
1895
    "QuickTime/MPEG4/Motion JPEG 2000 format",
1896
    sizeof(MOVContext),
1897
    mov_probe,
1898
    mov_read_header,
1899
    mov_read_packet,
1900
    mov_read_close,
1901
    mov_read_seek,
1902
};