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ffmpeg / libavformat / mov.c @ ec072669

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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.
11
 *
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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"
28
#include "isom.h"
29
#include "dv.h"
30
#include "libavcodec/mpeg4audio.h"
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#include "libavcodec/mpegaudiodata.h"
32

    
33
#ifdef CONFIG_ZLIB
34
#include <zlib.h>
35
#endif
36

    
37
/*
38
 * First version by Francois Revol revol@free.fr
39
 * Seek function by Gael Chardon gael.dev@4now.net
40
 *
41
 * Features and limitations:
42
 * - 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
44
 * - the code is quite ugly... maybe I won't do it recursive next time :-)
45
 *
46
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
47
 * when coding this :) (it's a writer anyway)
48
 *
49
 * Reference documents:
50
 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
51
 * Apple:
52
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
53
 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
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 * QuickTime is a trademark of Apple (AFAIK :))
55
 */
56

    
57
#include "qtpalette.h"
58

    
59

    
60
#undef NDEBUG
61
#include <assert.h>
62

    
63
/* the QuickTime file format is quite convoluted...
64
 * it has lots of index tables, each indexing something in another one...
65
 * Here we just use what is needed to read the chunks
66
 */
67

    
68
typedef struct {
69
    int first;
70
    int count;
71
    int id;
72
} MOV_stsc_t;
73

    
74
typedef struct {
75
    uint32_t type;
76
    char *path;
77
} MOV_dref_t;
78

    
79
typedef struct {
80
    uint32_t type;
81
    int64_t offset;
82
    int64_t size; /* total size (excluding the size and type fields) */
83
} MOV_atom_t;
84

    
85
struct MOVParseTableEntry;
86

    
87
typedef struct {
88
    unsigned track_id;
89
    uint64_t base_data_offset;
90
    uint64_t moof_offset;
91
    unsigned stsd_id;
92
    unsigned duration;
93
    unsigned size;
94
    unsigned flags;
95
} MOVFragment;
96

    
97
typedef struct {
98
    unsigned track_id;
99
    unsigned stsd_id;
100
    unsigned duration;
101
    unsigned size;
102
    unsigned flags;
103
} MOVTrackExt;
104

    
105
typedef struct MOVStreamContext {
106
    ByteIOContext *pb;
107
    int ffindex; /* the ffmpeg stream id */
108
    int next_chunk;
109
    unsigned int chunk_count;
110
    int64_t *chunk_offsets;
111
    unsigned int stts_count;
112
    MOV_stts_t *stts_data;
113
    unsigned int ctts_count;
114
    MOV_stts_t *ctts_data;
115
    unsigned int edit_count; /* number of 'edit' (elst atom) */
116
    unsigned int sample_to_chunk_sz;
117
    MOV_stsc_t *sample_to_chunk;
118
    int sample_to_ctime_index;
119
    int sample_to_ctime_sample;
120
    unsigned int sample_size;
121
    unsigned int sample_count;
122
    int *sample_sizes;
123
    unsigned int keyframe_count;
124
    int *keyframes;
125
    int time_scale;
126
    int time_rate;
127
    int current_sample;
128
    unsigned int bytes_per_frame;
129
    unsigned int samples_per_frame;
130
    int dv_audio_container;
131
    int pseudo_stream_id; ///< -1 means demux all ids
132
    int16_t audio_cid; ///< stsd audio compression id
133
    unsigned drefs_count;
134
    MOV_dref_t *drefs;
135
    int dref_id;
136
} MOVStreamContext;
137

    
138
typedef struct MOVContext {
139
    AVFormatContext *fc;
140
    int time_scale;
141
    int64_t duration; /* duration of the longest track */
142
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
143
    int found_mdat; /* we suppose we have enough data to read the file */
144
    AVPaletteControl palette_control;
145
    DVDemuxContext *dv_demux;
146
    AVFormatContext *dv_fctx;
147
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
148
    MOVFragment fragment; ///< current fragment in moof atom
149
    MOVTrackExt *trex_data;
150
    unsigned trex_count;
151
} MOVContext;
152

    
153

    
154
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
155

    
156
/* those functions parse an atom */
157
/* return code:
158
  0: continue to parse next atom
159
 <0: error occurred, exit
160
*/
161
/* links atom IDs to parse functions */
162
typedef struct MOVParseTableEntry {
163
    uint32_t type;
164
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
165
} MOVParseTableEntry;
166

    
167
static const MOVParseTableEntry mov_default_parse_table[];
168

    
169
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
170
{
171
    int64_t total_size = 0;
172
    MOV_atom_t a;
173
    int i;
174
    int err = 0;
175

    
176
    a.offset = atom.offset;
177

    
178
    if (atom.size < 0)
179
        atom.size = INT64_MAX;
180
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
181
        a.size = atom.size;
182
        a.type=0;
183
        if(atom.size >= 8) {
184
            a.size = get_be32(pb);
185
            a.type = get_le32(pb);
186
        }
187
        total_size += 8;
188
        a.offset += 8;
189
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
190
                a.type, (char*)&a.type, a.size, atom.size, total_size);
191
        if (a.size == 1) { /* 64 bit extended size */
192
            a.size = get_be64(pb) - 8;
193
            a.offset += 8;
194
            total_size += 8;
195
        }
196
        if (a.size == 0) {
197
            a.size = atom.size - total_size;
198
            if (a.size <= 8)
199
                break;
200
        }
201
        a.size -= 8;
202
        if(a.size < 0)
203
            break;
204
        a.size = FFMIN(a.size, atom.size - total_size);
205

    
206
        for (i = 0; mov_default_parse_table[i].type != 0
207
             && mov_default_parse_table[i].type != a.type; i++)
208
            /* empty */;
209

    
210
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
211
            url_fskip(pb, a.size);
212
        } else {
213
            offset_t start_pos = url_ftell(pb);
214
            int64_t left;
215
            err = mov_default_parse_table[i].parse(c, pb, a);
216
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
217
                break;
218
            left = a.size - url_ftell(pb) + start_pos;
219
            if (left > 0) /* skip garbage at atom end */
220
                url_fskip(pb, left);
221
        }
222

    
223
        a.offset += a.size;
224
        total_size += a.size;
225
    }
226

    
227
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
228
        url_fskip(pb, atom.size - total_size);
229

    
230
    return err;
231
}
232

    
233
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
234
{
235
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
236
    MOVStreamContext *sc = st->priv_data;
237
    int entries, i, j;
238

    
239
    get_be32(pb); // version + flags
240
    entries = get_be32(pb);
241
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
242
        return -1;
243
    sc->drefs_count = entries;
244
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
245

    
246
    for (i = 0; i < sc->drefs_count; i++) {
247
        MOV_dref_t *dref = &sc->drefs[i];
248
        uint32_t size = get_be32(pb);
249
        offset_t next = url_ftell(pb) + size - 4;
250

    
251
        dref->type = get_le32(pb);
252
        get_be32(pb); // version + flags
253
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
254

    
255
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
256
            /* macintosh alias record */
257
            uint16_t volume_len, len;
258
            char volume[28];
259
            int16_t type;
260

    
261
            url_fskip(pb, 10);
262

    
263
            volume_len = get_byte(pb);
264
            volume_len = FFMIN(volume_len, 27);
265
            get_buffer(pb, volume, 27);
266
            volume[volume_len] = 0;
267
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
268

    
269
            url_fskip(pb, 112);
270

    
271
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
272
                type = get_be16(pb);
273
                len = get_be16(pb);
274
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
275
                if (len&1)
276
                    len += 1;
277
                if (type == 2) { // absolute path
278
                    av_free(dref->path);
279
                    dref->path = av_mallocz(len+1);
280
                    if (!dref->path)
281
                        return AVERROR(ENOMEM);
282
                    get_buffer(pb, dref->path, len);
283
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
284
                        len -= volume_len;
285
                        memmove(dref->path, dref->path+volume_len, len);
286
                        dref->path[len] = 0;
287
                    }
288
                    for (j = 0; j < len; j++)
289
                        if (dref->path[j] == ':')
290
                            dref->path[j] = '/';
291
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
292
                } else
293
                    url_fskip(pb, len);
294
            }
295
        }
296
        url_fseek(pb, next, SEEK_SET);
297
    }
298
    return 0;
299
}
300

    
301
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
302
{
303
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
304
    uint32_t type;
305
    uint32_t ctype;
306

    
307
    get_byte(pb); /* version */
308
    get_be24(pb); /* flags */
309

    
310
    /* component type */
311
    ctype = get_le32(pb);
312
    type = get_le32(pb); /* component subtype */
313

    
314
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
315
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
316
    dprintf(c->fc, "stype= %c%c%c%c\n",
317
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
318
    if(!ctype)
319
        c->isom = 1;
320
    if     (type == MKTAG('v','i','d','e'))
321
        st->codec->codec_type = CODEC_TYPE_VIDEO;
322
    else if(type == MKTAG('s','o','u','n'))
323
        st->codec->codec_type = CODEC_TYPE_AUDIO;
324
    else if(type == MKTAG('m','1','a',' '))
325
        st->codec->codec_id = CODEC_ID_MP2;
326
    else if(type == MKTAG('s','u','b','p')) {
327
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
328
    }
329
    get_be32(pb); /* component  manufacture */
330
    get_be32(pb); /* component flags */
331
    get_be32(pb); /* component flags mask */
332

    
333
    if(atom.size <= 24)
334
        return 0; /* nothing left to read */
335

    
336
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
337
    return 0;
338
}
339

    
340
static int mp4_read_descr_len(ByteIOContext *pb)
341
{
342
    int len = 0;
343
    int count = 4;
344
    while (count--) {
345
        int c = get_byte(pb);
346
        len = (len << 7) | (c & 0x7f);
347
        if (!(c & 0x80))
348
            break;
349
    }
350
    return len;
351
}
352

    
353
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
354
{
355
    int len;
356
    *tag = get_byte(pb);
357
    len = mp4_read_descr_len(pb);
358
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
359
    return len;
360
}
361

    
362
#define MP4ESDescrTag                   0x03
363
#define MP4DecConfigDescrTag            0x04
364
#define MP4DecSpecificDescrTag          0x05
365

    
366
static const AVCodecTag mp4_audio_types[] = {
367
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
368
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
369
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
370
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
371
    { CODEC_ID_NONE,    0 },
372
};
373

    
374
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
375
{
376
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
377
    int tag, len;
378

    
379
    get_be32(pb); /* version + flags */
380
    len = mp4_read_descr(c, pb, &tag);
381
    if (tag == MP4ESDescrTag) {
382
        get_be16(pb); /* ID */
383
        get_byte(pb); /* priority */
384
    } else
385
        get_be16(pb); /* ID */
386

    
387
    len = mp4_read_descr(c, pb, &tag);
388
    if (tag == MP4DecConfigDescrTag) {
389
        int object_type_id = get_byte(pb);
390
        get_byte(pb); /* stream type */
391
        get_be24(pb); /* buffer size db */
392
        get_be32(pb); /* max bitrate */
393
        get_be32(pb); /* avg bitrate */
394

    
395
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
396
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
397
        len = mp4_read_descr(c, pb, &tag);
398
        if (tag == MP4DecSpecificDescrTag) {
399
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
400
            if((uint64_t)len > (1<<30))
401
                return -1;
402
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
403
            if (!st->codec->extradata)
404
                return AVERROR(ENOMEM);
405
            get_buffer(pb, st->codec->extradata, len);
406
            st->codec->extradata_size = len;
407
            if (st->codec->codec_id == CODEC_ID_AAC) {
408
                MPEG4AudioConfig cfg;
409
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
410
                                         st->codec->extradata_size);
411
                if (cfg.chan_config > 7)
412
                    return -1;
413
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
414
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
415
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
416
                else
417
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
418
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
419
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
420
                        cfg.object_type, cfg.ext_object_type,
421
                        cfg.sample_rate, cfg.ext_sample_rate);
422
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
423
                                                         cfg.object_type)))
424
                    st->codec->codec_id = CODEC_ID_AAC;
425
            }
426
        }
427
    }
428
    return 0;
429
}
430

    
431
/* this atom contains actual media data */
432
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
433
{
434
    if(atom.size == 0) /* wrong one (MP4) */
435
        return 0;
436
    c->found_mdat=1;
437
    return 0; /* now go for moov */
438
}
439

    
440
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
441
{
442
    uint32_t type = get_le32(pb);
443

    
444
    if (type != MKTAG('q','t',' ',' '))
445
        c->isom = 1;
446
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
447
    get_be32(pb); /* minor version */
448
    url_fskip(pb, atom.size - 8);
449
    return 0;
450
}
451

    
452
/* this atom should contain all header atoms */
453
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
454
{
455
    if (mov_read_default(c, pb, atom) < 0)
456
        return -1;
457
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
458
    /* so we don't parse the whole file if over a network */
459
    c->found_moov=1;
460
    return 0; /* now go for mdat */
461
}
462

    
463
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
464
{
465
    c->fragment.moof_offset = url_ftell(pb) - 8;
466
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
467
    return mov_read_default(c, pb, atom);
468
}
469

    
470
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
471
{
472
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
473
    MOVStreamContext *sc = st->priv_data;
474
    int version = get_byte(pb);
475
    int lang;
476

    
477
    if (version > 1)
478
        return -1; /* unsupported */
479

    
480
    get_be24(pb); /* flags */
481
    if (version == 1) {
482
        get_be64(pb);
483
        get_be64(pb);
484
    } else {
485
        get_be32(pb); /* creation time */
486
        get_be32(pb); /* modification time */
487
    }
488

    
489
    sc->time_scale = get_be32(pb);
490
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
491

    
492
    lang = get_be16(pb); /* language */
493
    ff_mov_lang_to_iso639(lang, st->language);
494
    get_be16(pb); /* quality */
495

    
496
    return 0;
497
}
498

    
499
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
500
{
501
    int version = get_byte(pb); /* version */
502
    get_be24(pb); /* flags */
503

    
504
    if (version == 1) {
505
        get_be64(pb);
506
        get_be64(pb);
507
    } else {
508
        get_be32(pb); /* creation time */
509
        get_be32(pb); /* modification time */
510
    }
511
    c->time_scale = get_be32(pb); /* time scale */
512

    
513
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
514

    
515
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
516
    get_be32(pb); /* preferred scale */
517

    
518
    get_be16(pb); /* preferred volume */
519

    
520
    url_fskip(pb, 10); /* reserved */
521

    
522
    url_fskip(pb, 36); /* display matrix */
523

    
524
    get_be32(pb); /* preview time */
525
    get_be32(pb); /* preview duration */
526
    get_be32(pb); /* poster time */
527
    get_be32(pb); /* selection time */
528
    get_be32(pb); /* selection duration */
529
    get_be32(pb); /* current time */
530
    get_be32(pb); /* next track ID */
531

    
532
    return 0;
533
}
534

    
535
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
536
{
537
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
538

    
539
    if((uint64_t)atom.size > (1<<30))
540
        return -1;
541

    
542
    // currently SVQ3 decoder expect full STSD header - so let's fake it
543
    // this should be fixed and just SMI header should be passed
544
    av_free(st->codec->extradata);
545
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
546
    if (!st->codec->extradata)
547
        return AVERROR(ENOMEM);
548
    st->codec->extradata_size = 0x5a + atom.size;
549
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
550
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
551
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
552
    return 0;
553
}
554

    
555
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
556
{
557
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
558
    int little_endian = get_be16(pb);
559

    
560
    if (little_endian) {
561
        switch (st->codec->codec_id) {
562
        case CODEC_ID_PCM_S24BE:
563
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
564
            break;
565
        case CODEC_ID_PCM_S32BE:
566
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
567
            break;
568
        default:
569
            break;
570
        }
571
    }
572
    return 0;
573
}
574

    
575
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
576
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
577
{
578
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
579
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
580
    uint8_t *buf;
581
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
582
        return -1;
583
    buf= av_realloc(st->codec->extradata, size);
584
    if(!buf)
585
        return -1;
586
    st->codec->extradata= buf;
587
    buf+= st->codec->extradata_size;
588
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
589
    AV_WB32(       buf    , atom.size + 8);
590
    AV_WL32(       buf + 4, atom.type);
591
    get_buffer(pb, buf + 8, atom.size);
592
    return 0;
593
}
594

    
595
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
596
{
597
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
598

    
599
    if((uint64_t)atom.size > (1<<30))
600
        return -1;
601

    
602
    if (st->codec->codec_id == CODEC_ID_QDM2) {
603
        // pass all frma atom to codec, needed at least for QDM2
604
        av_free(st->codec->extradata);
605
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
606
        if (!st->codec->extradata)
607
            return AVERROR(ENOMEM);
608
        st->codec->extradata_size = atom.size;
609
        get_buffer(pb, st->codec->extradata, atom.size);
610
    } else if (atom.size > 8) { /* to read frma, esds atoms */
611
        if (mov_read_default(c, pb, atom) < 0)
612
            return -1;
613
    } else
614
        url_fskip(pb, atom.size);
615
    return 0;
616
}
617

    
618
/**
619
 * This function reads atom content and puts data in extradata without tag
620
 * nor size unlike mov_read_extradata.
621
 */
622
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
623
{
624
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
625

    
626
    if((uint64_t)atom.size > (1<<30))
627
        return -1;
628

    
629
    av_free(st->codec->extradata);
630
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
631
    if (!st->codec->extradata)
632
        return AVERROR(ENOMEM);
633
    st->codec->extradata_size = atom.size;
634
    get_buffer(pb, st->codec->extradata, atom.size);
635
    return 0;
636
}
637

    
638
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
639
{
640
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
641
    MOVStreamContext *sc = st->priv_data;
642
    unsigned int i, entries;
643

    
644
    get_byte(pb); /* version */
645
    get_be24(pb); /* flags */
646

    
647
    entries = get_be32(pb);
648

    
649
    if(entries >= UINT_MAX/sizeof(int64_t))
650
        return -1;
651

    
652
    sc->chunk_count = entries;
653
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
654
    if (!sc->chunk_offsets)
655
        return -1;
656
    if      (atom.type == MKTAG('s','t','c','o'))
657
        for(i=0; i<entries; i++)
658
            sc->chunk_offsets[i] = get_be32(pb);
659
    else if (atom.type == MKTAG('c','o','6','4'))
660
        for(i=0; i<entries; i++)
661
            sc->chunk_offsets[i] = get_be64(pb);
662
    else
663
        return -1;
664

    
665
    return 0;
666
}
667

    
668
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
669
{
670
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
671
    MOVStreamContext *sc = st->priv_data;
672
    int j, entries, pseudo_stream_id;
673

    
674
    get_byte(pb); /* version */
675
    get_be24(pb); /* flags */
676

    
677
    entries = get_be32(pb);
678

    
679
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
680
        //Parsing Sample description table
681
        enum CodecID id;
682
        int dref_id;
683
        MOV_atom_t a = { 0, 0, 0 };
684
        offset_t start_pos = url_ftell(pb);
685
        int size = get_be32(pb); /* size */
686
        uint32_t format = get_le32(pb); /* data format */
687

    
688
        get_be32(pb); /* reserved */
689
        get_be16(pb); /* reserved */
690
        dref_id = get_be16(pb);
691

    
692
        if (st->codec->codec_tag &&
693
            st->codec->codec_tag != format &&
694
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
695
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
696
           ){
697
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
698
             * export it as a separate AVStream but this needs a few changes
699
             * in the MOV demuxer, patch welcome. */
700
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
701
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
702
            continue;
703
        }
704
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
705
        sc->dref_id= dref_id;
706

    
707
        st->codec->codec_tag = format;
708
        id = codec_get_id(codec_movaudio_tags, format);
709
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
710
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
711

    
712
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
713
            st->codec->codec_type = CODEC_TYPE_AUDIO;
714
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
715
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
716
            id = codec_get_id(codec_movvideo_tags, format);
717
            if (id <= 0)
718
                id = codec_get_id(codec_bmp_tags, format);
719
            if (id > 0)
720
                st->codec->codec_type = CODEC_TYPE_VIDEO;
721
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
722
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
723
                if(id > 0)
724
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
725
            }
726
        }
727

    
728
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
729
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
730
                (format >> 24) & 0xff, st->codec->codec_type);
731

    
732
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
733
            uint8_t codec_name[32];
734
            unsigned int color_depth;
735
            int color_greyscale;
736

    
737
            st->codec->codec_id = id;
738
            get_be16(pb); /* version */
739
            get_be16(pb); /* revision level */
740
            get_be32(pb); /* vendor */
741
            get_be32(pb); /* temporal quality */
742
            get_be32(pb); /* spatial quality */
743

    
744
            st->codec->width = get_be16(pb); /* width */
745
            st->codec->height = get_be16(pb); /* height */
746

    
747
            get_be32(pb); /* horiz resolution */
748
            get_be32(pb); /* vert resolution */
749
            get_be32(pb); /* data size, always 0 */
750
            get_be16(pb); /* frames per samples */
751

    
752
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
753
            if (codec_name[0] <= 31) {
754
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
755
                st->codec->codec_name[codec_name[0]] = 0;
756
            }
757

    
758
            st->codec->bits_per_sample = get_be16(pb); /* depth */
759
            st->codec->color_table_id = get_be16(pb); /* colortable id */
760
            dprintf(c->fc, "depth %d, ctab id %d\n",
761
                   st->codec->bits_per_sample, st->codec->color_table_id);
762
            /* figure out the palette situation */
763
            color_depth = st->codec->bits_per_sample & 0x1F;
764
            color_greyscale = st->codec->bits_per_sample & 0x20;
765

    
766
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
767
            if ((color_depth == 2) || (color_depth == 4) ||
768
                (color_depth == 8)) {
769
                /* for palette traversal */
770
                unsigned int color_start, color_count, color_end;
771
                unsigned char r, g, b;
772

    
773
                if (color_greyscale) {
774
                    int color_index, color_dec;
775
                    /* compute the greyscale palette */
776
                    st->codec->bits_per_sample = color_depth;
777
                    color_count = 1 << color_depth;
778
                    color_index = 255;
779
                    color_dec = 256 / (color_count - 1);
780
                    for (j = 0; j < color_count; j++) {
781
                        r = g = b = color_index;
782
                        c->palette_control.palette[j] =
783
                            (r << 16) | (g << 8) | (b);
784
                        color_index -= color_dec;
785
                        if (color_index < 0)
786
                            color_index = 0;
787
                    }
788
                } else if (st->codec->color_table_id) {
789
                    const uint8_t *color_table;
790
                    /* if flag bit 3 is set, use the default palette */
791
                    color_count = 1 << color_depth;
792
                    if (color_depth == 2)
793
                        color_table = ff_qt_default_palette_4;
794
                    else if (color_depth == 4)
795
                        color_table = ff_qt_default_palette_16;
796
                    else
797
                        color_table = ff_qt_default_palette_256;
798

    
799
                    for (j = 0; j < color_count; j++) {
800
                        r = color_table[j * 4 + 0];
801
                        g = color_table[j * 4 + 1];
802
                        b = color_table[j * 4 + 2];
803
                        c->palette_control.palette[j] =
804
                            (r << 16) | (g << 8) | (b);
805
                    }
806
                } else {
807
                    /* load the palette from the file */
808
                    color_start = get_be32(pb);
809
                    color_count = get_be16(pb);
810
                    color_end = get_be16(pb);
811
                    if ((color_start <= 255) &&
812
                        (color_end <= 255)) {
813
                        for (j = color_start; j <= color_end; j++) {
814
                            /* each R, G, or B component is 16 bits;
815
                             * only use the top 8 bits; skip alpha bytes
816
                             * up front */
817
                            get_byte(pb);
818
                            get_byte(pb);
819
                            r = get_byte(pb);
820
                            get_byte(pb);
821
                            g = get_byte(pb);
822
                            get_byte(pb);
823
                            b = get_byte(pb);
824
                            get_byte(pb);
825
                            c->palette_control.palette[j] =
826
                                (r << 16) | (g << 8) | (b);
827
                        }
828
                    }
829
                }
830
                st->codec->palctrl = &c->palette_control;
831
                st->codec->palctrl->palette_changed = 1;
832
            } else
833
                st->codec->palctrl = NULL;
834
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
835
            int bits_per_sample;
836
            uint16_t version = get_be16(pb);
837

    
838
            st->codec->codec_id = id;
839
            get_be16(pb); /* revision level */
840
            get_be32(pb); /* vendor */
841

    
842
            st->codec->channels = get_be16(pb);             /* channel count */
843
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
844
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
845

    
846
            sc->audio_cid = get_be16(pb);
847
            get_be16(pb); /* packet size = 0 */
848

    
849
            st->codec->sample_rate = ((get_be32(pb) >> 16));
850

    
851
            switch (st->codec->codec_id) {
852
            case CODEC_ID_PCM_S8:
853
            case CODEC_ID_PCM_U8:
854
                if (st->codec->bits_per_sample == 16)
855
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
856
                break;
857
            case CODEC_ID_PCM_S16LE:
858
            case CODEC_ID_PCM_S16BE:
859
                if (st->codec->bits_per_sample == 8)
860
                    st->codec->codec_id = CODEC_ID_PCM_S8;
861
                else if (st->codec->bits_per_sample == 24)
862
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
863
                break;
864
            /* set values for old format before stsd version 1 appeared */
865
            case CODEC_ID_MACE3:
866
                sc->samples_per_frame = 6;
867
                sc->bytes_per_frame = 2*st->codec->channels;
868
                break;
869
            case CODEC_ID_MACE6:
870
                sc->samples_per_frame = 6;
871
                sc->bytes_per_frame = 1*st->codec->channels;
872
                break;
873
            case CODEC_ID_ADPCM_IMA_QT:
874
                sc->samples_per_frame = 64;
875
                sc->bytes_per_frame = 34*st->codec->channels;
876
                break;
877
            case CODEC_ID_GSM:
878
                sc->samples_per_frame = 160;
879
                sc->bytes_per_frame = 33;
880
                break;
881
            default:
882
                break;
883
            }
884

    
885
            //Read QT version 1 fields. In version 0 these do not exist.
886
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
887
            if(!c->isom) {
888
                if(version==1) {
889
                    sc->samples_per_frame = get_be32(pb);
890
                    get_be32(pb); /* bytes per packet */
891
                    sc->bytes_per_frame = get_be32(pb);
892
                    get_be32(pb); /* bytes per sample */
893
                } else if(version==2) {
894
                    get_be32(pb); /* sizeof struct only */
895
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
896
                    st->codec->channels = get_be32(pb);
897
                    get_be32(pb); /* always 0x7F000000 */
898
                    get_be32(pb); /* bits per channel if sound is uncompressed */
899
                    get_be32(pb); /* lcpm format specific flag */
900
                    get_be32(pb); /* bytes per audio packet if constant */
901
                    get_be32(pb); /* lpcm frames per audio packet if constant */
902
                }
903
            }
904

    
905
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
906
            if (bits_per_sample) {
907
                st->codec->bits_per_sample = bits_per_sample;
908
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
909
            }
910
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
911
            st->codec->codec_id= id;
912
        } else {
913
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
914
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
915
        }
916
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
917
        a.size = size - (url_ftell(pb) - start_pos);
918
        if (a.size > 8) {
919
            if (mov_read_default(c, pb, a) < 0)
920
                return -1;
921
        } else if (a.size > 0)
922
            url_fskip(pb, a.size);
923
    }
924

    
925
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
926
        st->codec->sample_rate= sc->time_scale;
927

    
928
    /* special codec parameters handling */
929
    switch (st->codec->codec_id) {
930
#ifdef CONFIG_DV_DEMUXER
931
    case CODEC_ID_DVAUDIO:
932
        c->dv_fctx = av_alloc_format_context();
933
        c->dv_demux = dv_init_demux(c->dv_fctx);
934
        if (!c->dv_demux) {
935
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
936
            return -1;
937
        }
938
        sc->dv_audio_container = 1;
939
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
940
        break;
941
#endif
942
    /* no ifdef since parameters are always those */
943
    case CODEC_ID_AMR_WB:
944
        st->codec->sample_rate= 16000;
945
        st->codec->channels= 1; /* really needed */
946
        break;
947
    case CODEC_ID_QCELP:
948
    case CODEC_ID_AMR_NB:
949
        st->codec->frame_size= sc->samples_per_frame;
950
        st->codec->sample_rate= 8000;
951
        st->codec->channels= 1; /* really needed */
952
        break;
953
    case CODEC_ID_MP2:
954
    case CODEC_ID_MP3:
955
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
956
        st->need_parsing = AVSTREAM_PARSE_FULL;
957
        break;
958
    case CODEC_ID_GSM:
959
    case CODEC_ID_ADPCM_MS:
960
    case CODEC_ID_ADPCM_IMA_WAV:
961
        st->codec->block_align = sc->bytes_per_frame;
962
        break;
963
    case CODEC_ID_ALAC:
964
        if (st->codec->extradata_size == 36)
965
            st->codec->frame_size = AV_RB32((st->codec->extradata+12));
966
        break;
967
    default:
968
        break;
969
    }
970

    
971
    return 0;
972
}
973

    
974
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
975
{
976
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
977
    MOVStreamContext *sc = st->priv_data;
978
    unsigned int i, entries;
979

    
980
    get_byte(pb); /* version */
981
    get_be24(pb); /* flags */
982

    
983
    entries = get_be32(pb);
984

    
985
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
986
        return -1;
987

    
988
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
989

    
990
    sc->sample_to_chunk_sz = entries;
991
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
992
    if (!sc->sample_to_chunk)
993
        return -1;
994
    for(i=0; i<entries; i++) {
995
        sc->sample_to_chunk[i].first = get_be32(pb);
996
        sc->sample_to_chunk[i].count = get_be32(pb);
997
        sc->sample_to_chunk[i].id = get_be32(pb);
998
    }
999
    return 0;
1000
}
1001

    
1002
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1003
{
1004
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1005
    MOVStreamContext *sc = st->priv_data;
1006
    unsigned int i, entries;
1007

    
1008
    get_byte(pb); /* version */
1009
    get_be24(pb); /* flags */
1010

    
1011
    entries = get_be32(pb);
1012

    
1013
    if(entries >= UINT_MAX / sizeof(int))
1014
        return -1;
1015

    
1016
    sc->keyframe_count = entries;
1017

    
1018
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1019

    
1020
    sc->keyframes = av_malloc(entries * sizeof(int));
1021
    if (!sc->keyframes)
1022
        return -1;
1023
    for(i=0; i<entries; i++) {
1024
        sc->keyframes[i] = get_be32(pb);
1025
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1026
    }
1027
    return 0;
1028
}
1029

    
1030
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1031
{
1032
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1033
    MOVStreamContext *sc = st->priv_data;
1034
    unsigned int i, entries, sample_size;
1035

    
1036
    get_byte(pb); /* version */
1037
    get_be24(pb); /* flags */
1038

    
1039
    sample_size = get_be32(pb);
1040
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1041
        sc->sample_size = sample_size;
1042
    entries = get_be32(pb);
1043
    if(entries >= UINT_MAX / sizeof(int))
1044
        return -1;
1045

    
1046
    sc->sample_count = entries;
1047
    if (sample_size)
1048
        return 0;
1049

    
1050
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1051

    
1052
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1053
    if (!sc->sample_sizes)
1054
        return -1;
1055
    for(i=0; i<entries; i++)
1056
        sc->sample_sizes[i] = get_be32(pb);
1057
    return 0;
1058
}
1059

    
1060
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1061
{
1062
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1063
    MOVStreamContext *sc = st->priv_data;
1064
    unsigned int i, entries;
1065
    int64_t duration=0;
1066
    int64_t total_sample_count=0;
1067

    
1068
    get_byte(pb); /* version */
1069
    get_be24(pb); /* flags */
1070
    entries = get_be32(pb);
1071
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1072
        return -1;
1073

    
1074
    sc->stts_count = entries;
1075
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1076
    if (!sc->stts_data)
1077
        return -1;
1078
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1079

    
1080
    sc->time_rate=0;
1081

    
1082
    for(i=0; i<entries; i++) {
1083
        int sample_duration;
1084
        int sample_count;
1085

    
1086
        sample_count=get_be32(pb);
1087
        sample_duration = get_be32(pb);
1088
        sc->stts_data[i].count= sample_count;
1089
        sc->stts_data[i].duration= sample_duration;
1090

    
1091
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1092

    
1093
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1094

    
1095
        duration+=(int64_t)sample_duration*sample_count;
1096
        total_sample_count+=sample_count;
1097
    }
1098

    
1099
    st->nb_frames= total_sample_count;
1100
    if(duration)
1101
        st->duration= duration;
1102
    return 0;
1103
}
1104

    
1105
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1106
{
1107
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1108
    MOVStreamContext *sc = st->priv_data;
1109
    unsigned int i, entries;
1110

    
1111
    get_byte(pb); /* version */
1112
    get_be24(pb); /* flags */
1113
    entries = get_be32(pb);
1114
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1115
        return -1;
1116

    
1117
    sc->ctts_count = entries;
1118
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1119
    if (!sc->ctts_data)
1120
        return -1;
1121
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1122

    
1123
    for(i=0; i<entries; i++) {
1124
        int count    =get_be32(pb);
1125
        int duration =get_be32(pb);
1126

    
1127
        if (duration < 0) {
1128
            av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1129
            sc->ctts_count = 0;
1130
            url_fskip(pb, 8 * (entries - i - 1));
1131
            break;
1132
        }
1133
        sc->ctts_data[i].count   = count;
1134
        sc->ctts_data[i].duration= duration;
1135

    
1136
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1137
    }
1138
    return 0;
1139
}
1140

    
1141
static void mov_build_index(MOVContext *mov, AVStream *st)
1142
{
1143
    MOVStreamContext *sc = st->priv_data;
1144
    offset_t current_offset;
1145
    int64_t current_dts = 0;
1146
    unsigned int stts_index = 0;
1147
    unsigned int stsc_index = 0;
1148
    unsigned int stss_index = 0;
1149
    unsigned int i, j;
1150

    
1151
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1152
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1153
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1154
        unsigned int current_sample = 0;
1155
        unsigned int stts_sample = 0;
1156
        unsigned int keyframe, sample_size;
1157
        unsigned int distance = 0;
1158
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1159

    
1160
        st->nb_frames = sc->sample_count;
1161
        for (i = 0; i < sc->chunk_count; i++) {
1162
            current_offset = sc->chunk_offsets[i];
1163
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1164
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1165
                stsc_index++;
1166
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1167
                if (current_sample >= sc->sample_count) {
1168
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1169
                    goto out;
1170
                }
1171
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1172
                if (keyframe) {
1173
                    distance = 0;
1174
                    if (stss_index + 1 < sc->keyframe_count)
1175
                        stss_index++;
1176
                }
1177
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1178
                if(sc->pseudo_stream_id == -1 ||
1179
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1180
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1181
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1182
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1183
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1184
                            current_offset, current_dts, sample_size, distance, keyframe);
1185
                }
1186
                current_offset += sample_size;
1187
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1188
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1189
                distance++;
1190
                stts_sample++;
1191
                current_sample++;
1192
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1193
                    stts_sample = 0;
1194
                    stts_index++;
1195
                }
1196
            }
1197
        }
1198
    } else { /* read whole chunk */
1199
        unsigned int chunk_samples, chunk_size, chunk_duration;
1200
        unsigned int frames = 1;
1201
        for (i = 0; i < sc->chunk_count; i++) {
1202
            current_offset = sc->chunk_offsets[i];
1203
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1204
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1205
                stsc_index++;
1206
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1207
            /* get chunk size, beware of alaw/ulaw/mace */
1208
            if (sc->samples_per_frame > 0 &&
1209
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1210
                if (sc->samples_per_frame < 160)
1211
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1212
                else {
1213
                    chunk_size = sc->bytes_per_frame;
1214
                    frames = chunk_samples / sc->samples_per_frame;
1215
                    chunk_samples = sc->samples_per_frame;
1216
                }
1217
            } else
1218
                chunk_size = chunk_samples * sc->sample_size;
1219
            for (j = 0; j < frames; j++) {
1220
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1221
                /* get chunk duration */
1222
                chunk_duration = 0;
1223
                while (chunk_samples > 0) {
1224
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1225
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1226
                        sc->stts_data[stts_index].count -= chunk_samples;
1227
                        break;
1228
                    } else {
1229
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1230
                        chunk_samples -= sc->stts_data[stts_index].count;
1231
                        if (stts_index + 1 < sc->stts_count)
1232
                            stts_index++;
1233
                    }
1234
                }
1235
                current_offset += sc->bytes_per_frame;
1236
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1237
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1238
                        chunk_size, chunk_duration);
1239
                assert(chunk_duration % sc->time_rate == 0);
1240
                current_dts += chunk_duration / sc->time_rate;
1241
            }
1242
        }
1243
    }
1244
 out:
1245
    /* adjust sample count to avindex entries */
1246
    sc->sample_count = st->nb_index_entries;
1247
}
1248

    
1249
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1250
{
1251
    AVStream *st;
1252
    MOVStreamContext *sc;
1253
    int ret;
1254

    
1255
    st = av_new_stream(c->fc, c->fc->nb_streams);
1256
    if (!st) return AVERROR(ENOMEM);
1257
    sc = av_mallocz(sizeof(MOVStreamContext));
1258
    if (!sc) return AVERROR(ENOMEM);
1259

    
1260
    st->priv_data = sc;
1261
    st->codec->codec_type = CODEC_TYPE_DATA;
1262
    st->start_time = 0; /* XXX: check */
1263

    
1264
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1265
        return ret;
1266

    
1267
    /* sanity checks */
1268
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1269
                           (!sc->sample_size && !sc->sample_count))){
1270
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1271
               st->index);
1272
        sc->sample_count = 0; //ignore track
1273
        return 0;
1274
    }
1275
    if(!sc->time_rate)
1276
        sc->time_rate=1;
1277
    if(!sc->time_scale)
1278
        sc->time_scale= c->time_scale;
1279
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1280

    
1281
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1282
        !st->codec->frame_size && sc->stts_count == 1)
1283
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1284

    
1285
    if(st->duration != AV_NOPTS_VALUE){
1286
        assert(st->duration % sc->time_rate == 0);
1287
        st->duration /= sc->time_rate;
1288
    }
1289
    sc->ffindex = st->index;
1290
    mov_build_index(c, st);
1291

    
1292
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1293
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1294
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1295
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1296
    } else
1297
        sc->pb = c->fc->pb;
1298

    
1299
    switch (st->codec->codec_id) {
1300
#ifdef CONFIG_H261_DECODER
1301
    case CODEC_ID_H261:
1302
#endif
1303
#ifdef CONFIG_H263_DECODER
1304
    case CODEC_ID_H263:
1305
#endif
1306
#ifdef CONFIG_MPEG4_DECODER
1307
    case CODEC_ID_MPEG4:
1308
#endif
1309
        st->codec->width= 0; /* let decoder init width/height */
1310
        st->codec->height= 0;
1311
        break;
1312
#ifdef CONFIG_VORBIS_DECODER
1313
    case CODEC_ID_VORBIS:
1314
#endif
1315
        st->codec->sample_rate= 0; /* let decoder init parameters properly */
1316
        break;
1317
    }
1318

    
1319
    /* Do not need those anymore. */
1320
    av_freep(&sc->chunk_offsets);
1321
    av_freep(&sc->sample_to_chunk);
1322
    av_freep(&sc->sample_sizes);
1323
    av_freep(&sc->keyframes);
1324
    av_freep(&sc->stts_data);
1325

    
1326
    return 0;
1327
}
1328

    
1329
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1330
{
1331
    uint16_t str_size = get_be16(pb); /* string length */;
1332

    
1333
    get_be16(pb); /* skip language */
1334
    get_buffer(pb, str, FFMIN(size, str_size));
1335
}
1336

    
1337
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1338
{
1339
    uint64_t end = url_ftell(pb) + atom.size;
1340

    
1341
    while (url_ftell(pb) + 8 < end) {
1342
        uint32_t tag_size = get_be32(pb);
1343
        uint32_t tag      = get_le32(pb);
1344
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1345

    
1346
        if (next > end) // stop if tag_size is wrong
1347
            break;
1348

    
1349
        switch (tag) {
1350
        case MKTAG(0xa9,'n','a','m'):
1351
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1352
            break;
1353
        case MKTAG(0xa9,'w','r','t'):
1354
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1355
            break;
1356
        case MKTAG(0xa9,'c','p','y'):
1357
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1358
            break;
1359
        case MKTAG(0xa9,'i','n','f'):
1360
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1361
            break;
1362
        default:
1363
            break;
1364
        }
1365

    
1366
        url_fseek(pb, next, SEEK_SET);
1367
    }
1368

    
1369
    return 0;
1370
}
1371

    
1372
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1373
{
1374
    int i;
1375
    int width;
1376
    int height;
1377
    int64_t disp_transform[2];
1378
    int display_matrix[3][2];
1379
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1380
    int version = get_byte(pb);
1381

    
1382
    get_be24(pb); /* flags */
1383
    /*
1384
    MOV_TRACK_ENABLED 0x0001
1385
    MOV_TRACK_IN_MOVIE 0x0002
1386
    MOV_TRACK_IN_PREVIEW 0x0004
1387
    MOV_TRACK_IN_POSTER 0x0008
1388
    */
1389

    
1390
    if (version == 1) {
1391
        get_be64(pb);
1392
        get_be64(pb);
1393
    } else {
1394
        get_be32(pb); /* creation time */
1395
        get_be32(pb); /* modification time */
1396
    }
1397
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1398
    get_be32(pb); /* reserved */
1399
    st->start_time = 0; /* check */
1400
    /* highlevel (considering edits) duration in movie timebase */
1401
    (version == 1) ? get_be64(pb) : get_be32(pb);
1402
    get_be32(pb); /* reserved */
1403
    get_be32(pb); /* reserved */
1404

    
1405
    get_be16(pb); /* layer */
1406
    get_be16(pb); /* alternate group */
1407
    get_be16(pb); /* volume */
1408
    get_be16(pb); /* reserved */
1409

    
1410
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1411
    // they're kept in fixed point format through all calculations
1412
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1413
    for (i = 0; i < 3; i++) {
1414
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1415
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1416
        get_be32(pb);           // 2.30 fixed point (not used)
1417
    }
1418

    
1419
    width = get_be32(pb);       // 16.16 fixed point track width
1420
    height = get_be32(pb);      // 16.16 fixed point track height
1421

    
1422
    //transform the display width/height according to the matrix
1423
    // skip this if the display matrix is the default identity matrix
1424
    // to keep the same scale, use [width height 1<<16]
1425
    if (width && height &&
1426
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1427
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1428
        display_matrix[2][0]           || display_matrix[2][1])) {
1429
        for (i = 0; i < 2; i++)
1430
            disp_transform[i] =
1431
                (int64_t)  width  * display_matrix[0][i] +
1432
                (int64_t)  height * display_matrix[1][i] +
1433
                ((int64_t) display_matrix[2][i] << 16);
1434

    
1435
        //sample aspect ratio is new width/height divided by old width/height
1436
        st->codec->sample_aspect_ratio = av_d2q(
1437
            ((double) disp_transform[0] * height) /
1438
            ((double) disp_transform[1] * width), INT_MAX);
1439
    }
1440
    return 0;
1441
}
1442

    
1443
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1444
{
1445
    MOVFragment *frag = &c->fragment;
1446
    MOVTrackExt *trex = NULL;
1447
    int flags, track_id, i;
1448

    
1449
    get_byte(pb); /* version */
1450
    flags = get_be24(pb);
1451

    
1452
    track_id = get_be32(pb);
1453
    if (!track_id || track_id > c->fc->nb_streams)
1454
        return -1;
1455
    frag->track_id = track_id;
1456
    for (i = 0; i < c->trex_count; i++)
1457
        if (c->trex_data[i].track_id == frag->track_id) {
1458
            trex = &c->trex_data[i];
1459
            break;
1460
        }
1461
    if (!trex) {
1462
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1463
        return -1;
1464
    }
1465

    
1466
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1467
    else              frag->base_data_offset = frag->moof_offset;
1468
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1469
    else              frag->stsd_id          = trex->stsd_id;
1470

    
1471
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1472
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1473
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1474
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1475
    return 0;
1476
}
1477

    
1478
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1479
{
1480
    MOVTrackExt *trex;
1481

    
1482
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1483
        return -1;
1484
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1485
    if (!c->trex_data)
1486
        return AVERROR(ENOMEM);
1487
    trex = &c->trex_data[c->trex_count++];
1488
    get_byte(pb); /* version */
1489
    get_be24(pb); /* flags */
1490
    trex->track_id = get_be32(pb);
1491
    trex->stsd_id  = get_be32(pb);
1492
    trex->duration = get_be32(pb);
1493
    trex->size     = get_be32(pb);
1494
    trex->flags    = get_be32(pb);
1495
    return 0;
1496
}
1497

    
1498
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1499
{
1500
    MOVFragment *frag = &c->fragment;
1501
    AVStream *st;
1502
    MOVStreamContext *sc;
1503
    uint64_t offset;
1504
    int64_t dts;
1505
    int data_offset = 0;
1506
    unsigned entries, first_sample_flags = frag->flags;
1507
    int flags, distance, i;
1508

    
1509
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1510
        return -1;
1511
    st = c->fc->streams[frag->track_id-1];
1512
    sc = st->priv_data;
1513
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1514
        return 0;
1515
    get_byte(pb); /* version */
1516
    flags = get_be24(pb);
1517
    entries = get_be32(pb);
1518
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1519
    if (flags & 0x001) data_offset        = get_be32(pb);
1520
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1521
    if (flags & 0x800) {
1522
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1523
            return -1;
1524
        sc->ctts_data = av_realloc(sc->ctts_data,
1525
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1526
        if (!sc->ctts_data)
1527
            return AVERROR(ENOMEM);
1528
    }
1529
    dts = st->duration;
1530
    offset = frag->base_data_offset + data_offset;
1531
    distance = 0;
1532
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1533
    for (i = 0; i < entries; i++) {
1534
        unsigned sample_size = frag->size;
1535
        int sample_flags = i ? frag->flags : first_sample_flags;
1536
        unsigned sample_duration = frag->duration;
1537
        int keyframe;
1538

    
1539
        if (flags & 0x100) sample_duration = get_be32(pb);
1540
        if (flags & 0x200) sample_size     = get_be32(pb);
1541
        if (flags & 0x400) sample_flags    = get_be32(pb);
1542
        if (flags & 0x800) {
1543
            sc->ctts_data[sc->ctts_count].count = 1;
1544
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1545
            sc->ctts_count++;
1546
        }
1547
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1548
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1549
            distance = 0;
1550
        av_add_index_entry(st, offset, dts, sample_size, distance,
1551
                           keyframe ? AVINDEX_KEYFRAME : 0);
1552
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1553
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1554
                offset, dts, sample_size, distance, keyframe);
1555
        distance++;
1556
        assert(sample_duration % sc->time_rate == 0);
1557
        dts += sample_duration / sc->time_rate;
1558
        offset += sample_size;
1559
    }
1560
    frag->moof_offset = offset;
1561
    sc->sample_count = st->nb_index_entries;
1562
    st->duration = dts;
1563
    return 0;
1564
}
1565

    
1566
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1567
/* like the files created with Adobe Premiere 5.0, for samples see */
1568
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1569
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1570
{
1571
    int err;
1572

    
1573
    if (atom.size < 8)
1574
        return 0; /* continue */
1575
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1576
        url_fskip(pb, atom.size - 4);
1577
        return 0;
1578
    }
1579
    atom.type = get_le32(pb);
1580
    atom.offset += 8;
1581
    atom.size -= 8;
1582
    if (atom.type != MKTAG('m','d','a','t')) {
1583
        url_fskip(pb, atom.size);
1584
        return 0;
1585
    }
1586
    err = mov_read_mdat(c, pb, atom);
1587
    return err;
1588
}
1589

    
1590
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1591
{
1592
#ifdef CONFIG_ZLIB
1593
    ByteIOContext ctx;
1594
    uint8_t *cmov_data;
1595
    uint8_t *moov_data; /* uncompressed data */
1596
    long cmov_len, moov_len;
1597
    int ret = -1;
1598

    
1599
    get_be32(pb); /* dcom atom */
1600
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1601
        return -1;
1602
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1603
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1604
        return -1;
1605
    }
1606
    get_be32(pb); /* cmvd atom */
1607
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1608
        return -1;
1609
    moov_len = get_be32(pb); /* uncompressed size */
1610
    cmov_len = atom.size - 6 * 4;
1611

    
1612
    cmov_data = av_malloc(cmov_len);
1613
    if (!cmov_data)
1614
        return -1;
1615
    moov_data = av_malloc(moov_len);
1616
    if (!moov_data) {
1617
        av_free(cmov_data);
1618
        return -1;
1619
    }
1620
    get_buffer(pb, cmov_data, cmov_len);
1621
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1622
        goto free_and_return;
1623
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1624
        goto free_and_return;
1625
    atom.type = MKTAG('m','o','o','v');
1626
    atom.offset = 0;
1627
    atom.size = moov_len;
1628
#ifdef DEBUG
1629
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1630
#endif
1631
    ret = mov_read_default(c, &ctx, atom);
1632
free_and_return:
1633
    av_free(moov_data);
1634
    av_free(cmov_data);
1635
    return ret;
1636
#else
1637
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1638
    return -1;
1639
#endif
1640
}
1641

    
1642
/* edit list atom */
1643
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1644
{
1645
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1646
    int i, edit_count;
1647

    
1648
    get_byte(pb); /* version */
1649
    get_be24(pb); /* flags */
1650
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1651

    
1652
    for(i=0; i<edit_count; i++){
1653
        int time;
1654
        get_be32(pb); /* Track duration */
1655
        time = get_be32(pb); /* Media time */
1656
        get_be32(pb); /* Media rate */
1657
        if (time != 0)
1658
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1659
                   "a/v desync might occur, patch welcome\n");
1660
    }
1661
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1662
    return 0;
1663
}
1664

    
1665
static const MOVParseTableEntry mov_default_parse_table[] = {
1666
{ MKTAG('a','v','s','s'), mov_read_extradata },
1667
{ MKTAG('c','o','6','4'), mov_read_stco },
1668
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1669
{ MKTAG('d','i','n','f'), mov_read_default },
1670
{ MKTAG('d','r','e','f'), mov_read_dref },
1671
{ MKTAG('e','d','t','s'), mov_read_default },
1672
{ MKTAG('e','l','s','t'), mov_read_elst },
1673
{ MKTAG('e','n','d','a'), mov_read_enda },
1674
{ MKTAG('f','i','e','l'), mov_read_extradata },
1675
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1676
{ MKTAG('g','l','b','l'), mov_read_glbl },
1677
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1678
{ MKTAG('j','p','2','h'), mov_read_extradata },
1679
{ MKTAG('m','d','a','t'), mov_read_mdat },
1680
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1681
{ MKTAG('m','d','i','a'), mov_read_default },
1682
{ MKTAG('m','i','n','f'), mov_read_default },
1683
{ MKTAG('m','o','o','f'), mov_read_moof },
1684
{ MKTAG('m','o','o','v'), mov_read_moov },
1685
{ MKTAG('m','v','e','x'), mov_read_default },
1686
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1687
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1688
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1689
{ MKTAG('a','v','c','C'), mov_read_glbl },
1690
{ MKTAG('s','t','b','l'), mov_read_default },
1691
{ MKTAG('s','t','c','o'), mov_read_stco },
1692
{ MKTAG('s','t','s','c'), mov_read_stsc },
1693
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1694
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1695
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1696
{ MKTAG('s','t','t','s'), mov_read_stts },
1697
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1698
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1699
{ MKTAG('t','r','a','k'), mov_read_trak },
1700
{ MKTAG('t','r','a','f'), mov_read_default },
1701
{ MKTAG('t','r','e','x'), mov_read_trex },
1702
{ MKTAG('t','r','u','n'), mov_read_trun },
1703
{ MKTAG('u','d','t','a'), mov_read_udta },
1704
{ MKTAG('w','a','v','e'), mov_read_wave },
1705
{ MKTAG('e','s','d','s'), mov_read_esds },
1706
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1707
{ MKTAG('c','m','o','v'), mov_read_cmov },
1708
{ 0, NULL }
1709
};
1710

    
1711
static int mov_probe(AVProbeData *p)
1712
{
1713
    unsigned int offset;
1714
    uint32_t tag;
1715
    int score = 0;
1716

    
1717
    /* check file header */
1718
    offset = 0;
1719
    for(;;) {
1720
        /* ignore invalid offset */
1721
        if ((offset + 8) > (unsigned int)p->buf_size)
1722
            return score;
1723
        tag = AV_RL32(p->buf + offset + 4);
1724
        switch(tag) {
1725
        /* check for obvious tags */
1726
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1727
        case MKTAG('m','o','o','v'):
1728
        case MKTAG('m','d','a','t'):
1729
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1730
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1731
        case MKTAG('f','t','y','p'):
1732
            return AVPROBE_SCORE_MAX;
1733
        /* those are more common words, so rate then a bit less */
1734
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1735
        case MKTAG('w','i','d','e'):
1736
        case MKTAG('f','r','e','e'):
1737
        case MKTAG('j','u','n','k'):
1738
        case MKTAG('p','i','c','t'):
1739
            return AVPROBE_SCORE_MAX - 5;
1740
        case MKTAG(0x82,0x82,0x7f,0x7d):
1741
        case MKTAG('s','k','i','p'):
1742
        case MKTAG('u','u','i','d'):
1743
        case MKTAG('p','r','f','l'):
1744
            offset = AV_RB32(p->buf+offset) + offset;
1745
            /* if we only find those cause probedata is too small at least rate them */
1746
            score = AVPROBE_SCORE_MAX - 50;
1747
            break;
1748
        default:
1749
            /* unrecognized tag */
1750
            return score;
1751
        }
1752
    }
1753
    return score;
1754
}
1755

    
1756
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1757
{
1758
    MOVContext *mov = s->priv_data;
1759
    ByteIOContext *pb = s->pb;
1760
    int err;
1761
    MOV_atom_t atom = { 0, 0, 0 };
1762

    
1763
    mov->fc = s;
1764
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1765
    if(!url_is_streamed(pb))
1766
        atom.size = url_fsize(pb);
1767
    else
1768
        atom.size = INT64_MAX;
1769

    
1770
    /* check MOV header */
1771
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1772
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1773
        return err;
1774
    }
1775
    if (!mov->found_moov) {
1776
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1777
        return -1;
1778
    }
1779
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1780

    
1781
    return 0;
1782
}
1783

    
1784
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1785
{
1786
    MOVContext *mov = s->priv_data;
1787
    MOVStreamContext *sc = 0;
1788
    AVIndexEntry *sample = 0;
1789
    int64_t best_dts = INT64_MAX;
1790
    int i;
1791
 retry:
1792
    for (i = 0; i < s->nb_streams; i++) {
1793
        AVStream *st = s->streams[i];
1794
        MOVStreamContext *msc = st->priv_data;
1795
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1796
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1797
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1798
                                     AV_TIME_BASE, msc->time_scale);
1799
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1800
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1801
                (!url_is_streamed(s->pb) &&
1802
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1803
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1804
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1805
                sample = current_sample;
1806
                best_dts = dts;
1807
                sc = msc;
1808
            }
1809
        }
1810
    }
1811
    if (!sample) {
1812
        mov->found_mdat = 0;
1813
        if (!url_is_streamed(s->pb) ||
1814
            mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1815
            url_feof(s->pb))
1816
            return -1;
1817
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1818
        goto retry;
1819
    }
1820
    /* must be done just before reading, to avoid infinite loop on sample */
1821
    sc->current_sample++;
1822
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1823
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1824
               sc->ffindex, sample->pos);
1825
        return -1;
1826
    }
1827
    av_get_packet(sc->pb, pkt, sample->size);
1828
#ifdef CONFIG_DV_DEMUXER
1829
    if (mov->dv_demux && sc->dv_audio_container) {
1830
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1831
        av_free(pkt->data);
1832
        pkt->size = 0;
1833
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1834
            return -1;
1835
    }
1836
#endif
1837
    pkt->stream_index = sc->ffindex;
1838
    pkt->dts = sample->timestamp;
1839
    if (sc->ctts_data) {
1840
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1841
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1842
        /* update ctts context */
1843
        sc->sample_to_ctime_sample++;
1844
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1845
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1846
            sc->sample_to_ctime_index++;
1847
            sc->sample_to_ctime_sample = 0;
1848
        }
1849
    } else {
1850
        AVStream *st = s->streams[sc->ffindex];
1851
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1852
            st->index_entries[sc->current_sample].timestamp : st->duration;
1853
        pkt->duration = next_dts - pkt->dts;
1854
        pkt->pts = pkt->dts;
1855
    }
1856
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1857
    pkt->pos = sample->pos;
1858
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1859
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1860
    return 0;
1861
}
1862

    
1863
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1864
{
1865
    MOVStreamContext *sc = st->priv_data;
1866
    int sample, time_sample;
1867
    int i;
1868

    
1869
    sample = av_index_search_timestamp(st, timestamp, flags);
1870
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1871
    if (sample < 0) /* not sure what to do */
1872
        return -1;
1873
    sc->current_sample = sample;
1874
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1875
    /* adjust ctts index */
1876
    if (sc->ctts_data) {
1877
        time_sample = 0;
1878
        for (i = 0; i < sc->ctts_count; i++) {
1879
            int next = time_sample + sc->ctts_data[i].count;
1880
            if (next > sc->current_sample) {
1881
                sc->sample_to_ctime_index = i;
1882
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1883
                break;
1884
            }
1885
            time_sample = next;
1886
        }
1887
    }
1888
    return sample;
1889
}
1890

    
1891
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1892
{
1893
    AVStream *st;
1894
    int64_t seek_timestamp, timestamp;
1895
    int sample;
1896
    int i;
1897

    
1898
    if (stream_index >= s->nb_streams)
1899
        return -1;
1900

    
1901
    st = s->streams[stream_index];
1902
    sample = mov_seek_stream(st, sample_time, flags);
1903
    if (sample < 0)
1904
        return -1;
1905

    
1906
    /* adjust seek timestamp to found sample timestamp */
1907
    seek_timestamp = st->index_entries[sample].timestamp;
1908

    
1909
    for (i = 0; i < s->nb_streams; i++) {
1910
        st = s->streams[i];
1911
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1912
            continue;
1913

    
1914
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1915
        mov_seek_stream(st, timestamp, flags);
1916
    }
1917
    return 0;
1918
}
1919

    
1920
static int mov_read_close(AVFormatContext *s)
1921
{
1922
    int i, j;
1923
    MOVContext *mov = s->priv_data;
1924
    for(i=0; i<s->nb_streams; i++) {
1925
        MOVStreamContext *sc = s->streams[i]->priv_data;
1926
        av_freep(&sc->ctts_data);
1927
        for (j=0; j<sc->drefs_count; j++)
1928
            av_freep(&sc->drefs[j].path);
1929
        av_freep(&sc->drefs);
1930
        if (sc->pb && sc->pb != s->pb)
1931
            url_fclose(sc->pb);
1932
    }
1933
    if(mov->dv_demux){
1934
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1935
            av_freep(&mov->dv_fctx->streams[i]->codec);
1936
            av_freep(&mov->dv_fctx->streams[i]);
1937
        }
1938
        av_freep(&mov->dv_fctx);
1939
        av_freep(&mov->dv_demux);
1940
    }
1941
    av_freep(&mov->trex_data);
1942
    return 0;
1943
}
1944

    
1945
AVInputFormat mov_demuxer = {
1946
    "mov,mp4,m4a,3gp,3g2,mj2",
1947
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
1948
    sizeof(MOVContext),
1949
    mov_probe,
1950
    mov_read_header,
1951
    mov_read_packet,
1952
    mov_read_close,
1953
    mov_read_seek,
1954
};