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ffmpeg / libavformat / mov.c @ bf252f7f

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1
/*
2
 * MOV demuxer
3
 * Copyright (c) 2001 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
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 * 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.
16
 *
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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 "libavutil/intreadwrite.h"
27
#include "avformat.h"
28
#include "riff.h"
29
#include "isom.h"
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#include "dv.h"
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#include "libavcodec/mpeg4audio.h"
32
#include "libavcodec/mpegaudiodata.h"
33

    
34
#if CONFIG_ZLIB
35
#include <zlib.h>
36
#endif
37

    
38
/*
39
 * First version by Francois Revol revol@free.fr
40
 * Seek function by Gael Chardon gael.dev@4now.net
41
 *
42
 * Features and limitations:
43
 * - reads most of the QT files I have (at least the structure),
44
 *   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 :-)
46
 *
47
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
48
 * when coding this :) (it's a writer anyway)
49
 *
50
 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
52
 * Apple:
53
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
55
 * QuickTime is a trademark of Apple (AFAIK :))
56
 */
57

    
58
#include "qtpalette.h"
59

    
60

    
61
#undef NDEBUG
62
#include <assert.h>
63

    
64
/* the QuickTime file format is quite convoluted...
65
 * it has lots of index tables, each indexing something in another one...
66
 * Here we just use what is needed to read the chunks
67
 */
68

    
69
typedef struct {
70
    int first;
71
    int count;
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    int id;
73
} MOVStsc;
74

    
75
typedef struct {
76
    uint32_t type;
77
    char *path;
78
} MOVDref;
79

    
80
typedef struct {
81
    uint32_t type;
82
    int64_t offset;
83
    int64_t size; /* total size (excluding the size and type fields) */
84
} MOVAtom;
85

    
86
struct MOVParseTableEntry;
87

    
88
typedef struct {
89
    unsigned track_id;
90
    uint64_t base_data_offset;
91
    uint64_t moof_offset;
92
    unsigned stsd_id;
93
    unsigned duration;
94
    unsigned size;
95
    unsigned flags;
96
} MOVFragment;
97

    
98
typedef struct {
99
    unsigned track_id;
100
    unsigned stsd_id;
101
    unsigned duration;
102
    unsigned size;
103
    unsigned flags;
104
} MOVTrackExt;
105

    
106
typedef struct MOVStreamContext {
107
    ByteIOContext *pb;
108
    int ffindex; /* the ffmpeg stream id */
109
    int next_chunk;
110
    unsigned int chunk_count;
111
    int64_t *chunk_offsets;
112
    unsigned int stts_count;
113
    MOVStts *stts_data;
114
    unsigned int ctts_count;
115
    MOVStts *ctts_data;
116
    unsigned int edit_count; /* number of 'edit' (elst atom) */
117
    unsigned int sample_to_chunk_sz;
118
    MOVStsc *sample_to_chunk;
119
    int sample_to_ctime_index;
120
    int sample_to_ctime_sample;
121
    unsigned int sample_size;
122
    unsigned int sample_count;
123
    int *sample_sizes;
124
    unsigned int keyframe_count;
125
    int *keyframes;
126
    int time_scale;
127
    int time_rate;
128
    int current_sample;
129
    unsigned int bytes_per_frame;
130
    unsigned int samples_per_frame;
131
    int dv_audio_container;
132
    int pseudo_stream_id; ///< -1 means demux all ids
133
    int16_t audio_cid; ///< stsd audio compression id
134
    unsigned drefs_count;
135
    MOVDref *drefs;
136
    int dref_id;
137
    int wrong_dts; ///< dts are wrong due to negative ctts
138
    int width;  ///< tkhd width
139
    int height; ///< tkhd height
140
} MOVStreamContext;
141

    
142
typedef struct MOVContext {
143
    AVFormatContext *fc;
144
    int time_scale;
145
    int64_t duration; /* duration of the longest track */
146
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
147
    int found_mdat; /* we suppose we have enough data to read the file */
148
    AVPaletteControl palette_control;
149
    DVDemuxContext *dv_demux;
150
    AVFormatContext *dv_fctx;
151
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
152
    MOVFragment fragment; ///< current fragment in moof atom
153
    MOVTrackExt *trex_data;
154
    unsigned trex_count;
155
    int itunes_metadata; ///< metadata are itunes style
156
} MOVContext;
157

    
158

    
159
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
160

    
161
/* those functions parse an atom */
162
/* return code:
163
  0: continue to parse next atom
164
 <0: error occurred, exit
165
*/
166
/* links atom IDs to parse functions */
167
typedef struct MOVParseTableEntry {
168
    uint32_t type;
169
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
170
} MOVParseTableEntry;
171

    
172
static const MOVParseTableEntry mov_default_parse_table[];
173

    
174
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
175
{
176
    int64_t total_size = 0;
177
    MOVAtom a;
178
    int i;
179
    int err = 0;
180

    
181
    a.offset = atom.offset;
182

    
183
    if (atom.size < 0)
184
        atom.size = INT64_MAX;
185
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
186
        a.size = atom.size;
187
        a.type=0;
188
        if(atom.size >= 8) {
189
            a.size = get_be32(pb);
190
            a.type = get_le32(pb);
191
        }
192
        total_size += 8;
193
        a.offset += 8;
194
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
195
                a.type, (char*)&a.type, a.size, atom.size, total_size);
196
        if (a.size == 1) { /* 64 bit extended size */
197
            a.size = get_be64(pb) - 8;
198
            a.offset += 8;
199
            total_size += 8;
200
        }
201
        if (a.size == 0) {
202
            a.size = atom.size - total_size;
203
            if (a.size <= 8)
204
                break;
205
        }
206
        a.size -= 8;
207
        if(a.size < 0)
208
            break;
209
        a.size = FFMIN(a.size, atom.size - total_size);
210

    
211
        for (i = 0; mov_default_parse_table[i].type != 0
212
             && mov_default_parse_table[i].type != a.type; i++)
213
            /* empty */;
214

    
215
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
216
            url_fskip(pb, a.size);
217
        } else {
218
            int64_t start_pos = url_ftell(pb);
219
            int64_t left;
220
            err = mov_default_parse_table[i].parse(c, pb, a);
221
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
222
                break;
223
            left = a.size - url_ftell(pb) + start_pos;
224
            if (left > 0) /* skip garbage at atom end */
225
                url_fskip(pb, left);
226
        }
227

    
228
        a.offset += a.size;
229
        total_size += a.size;
230
    }
231

    
232
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
233
        url_fskip(pb, atom.size - total_size);
234

    
235
    return err;
236
}
237

    
238
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
239
{
240
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
241
    MOVStreamContext *sc = st->priv_data;
242
    int entries, i, j;
243

    
244
    get_be32(pb); // version + flags
245
    entries = get_be32(pb);
246
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
247
        return -1;
248
    sc->drefs_count = entries;
249
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
250

    
251
    for (i = 0; i < sc->drefs_count; i++) {
252
        MOVDref *dref = &sc->drefs[i];
253
        uint32_t size = get_be32(pb);
254
        int64_t next = url_ftell(pb) + size - 4;
255

    
256
        dref->type = get_le32(pb);
257
        get_be32(pb); // version + flags
258
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
259

    
260
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
261
            /* macintosh alias record */
262
            uint16_t volume_len, len;
263
            char volume[28];
264
            int16_t type;
265

    
266
            url_fskip(pb, 10);
267

    
268
            volume_len = get_byte(pb);
269
            volume_len = FFMIN(volume_len, 27);
270
            get_buffer(pb, volume, 27);
271
            volume[volume_len] = 0;
272
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
273

    
274
            url_fskip(pb, 112);
275

    
276
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
277
                type = get_be16(pb);
278
                len = get_be16(pb);
279
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
280
                if (len&1)
281
                    len += 1;
282
                if (type == 2) { // absolute path
283
                    av_free(dref->path);
284
                    dref->path = av_mallocz(len+1);
285
                    if (!dref->path)
286
                        return AVERROR(ENOMEM);
287
                    get_buffer(pb, dref->path, len);
288
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
289
                        len -= volume_len;
290
                        memmove(dref->path, dref->path+volume_len, len);
291
                        dref->path[len] = 0;
292
                    }
293
                    for (j = 0; j < len; j++)
294
                        if (dref->path[j] == ':')
295
                            dref->path[j] = '/';
296
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
297
                } else
298
                    url_fskip(pb, len);
299
            }
300
        }
301
        url_fseek(pb, next, SEEK_SET);
302
    }
303
    return 0;
304
}
305

    
306
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
307
{
308
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
309
    uint32_t type;
310
    uint32_t ctype;
311

    
312
    get_byte(pb); /* version */
313
    get_be24(pb); /* flags */
314

    
315
    /* component type */
316
    ctype = get_le32(pb);
317
    type = get_le32(pb); /* component subtype */
318

    
319
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
320
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
321
    dprintf(c->fc, "stype= %c%c%c%c\n",
322
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
323
    if(!ctype)
324
        c->isom = 1;
325
    if     (type == MKTAG('v','i','d','e'))
326
        st->codec->codec_type = CODEC_TYPE_VIDEO;
327
    else if(type == MKTAG('s','o','u','n'))
328
        st->codec->codec_type = CODEC_TYPE_AUDIO;
329
    else if(type == MKTAG('m','1','a',' '))
330
        st->codec->codec_id = CODEC_ID_MP2;
331
    else if(type == MKTAG('s','u','b','p')) {
332
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
333
    }
334
    get_be32(pb); /* component  manufacture */
335
    get_be32(pb); /* component flags */
336
    get_be32(pb); /* component flags mask */
337

    
338
    if(atom.size <= 24)
339
        return 0; /* nothing left to read */
340

    
341
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
342
    return 0;
343
}
344

    
345
static int mp4_read_descr_len(ByteIOContext *pb)
346
{
347
    int len = 0;
348
    int count = 4;
349
    while (count--) {
350
        int c = get_byte(pb);
351
        len = (len << 7) | (c & 0x7f);
352
        if (!(c & 0x80))
353
            break;
354
    }
355
    return len;
356
}
357

    
358
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
359
{
360
    int len;
361
    *tag = get_byte(pb);
362
    len = mp4_read_descr_len(pb);
363
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
364
    return len;
365
}
366

    
367
#define MP4ESDescrTag                   0x03
368
#define MP4DecConfigDescrTag            0x04
369
#define MP4DecSpecificDescrTag          0x05
370

    
371
static const AVCodecTag mp4_audio_types[] = {
372
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
373
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
374
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
375
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
376
    { CODEC_ID_NONE,    0 },
377
};
378

    
379
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
380
{
381
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
382
    int tag, len;
383

    
384
    get_be32(pb); /* version + flags */
385
    len = mp4_read_descr(c, pb, &tag);
386
    if (tag == MP4ESDescrTag) {
387
        get_be16(pb); /* ID */
388
        get_byte(pb); /* priority */
389
    } else
390
        get_be16(pb); /* ID */
391

    
392
    len = mp4_read_descr(c, pb, &tag);
393
    if (tag == MP4DecConfigDescrTag) {
394
        int object_type_id = get_byte(pb);
395
        get_byte(pb); /* stream type */
396
        get_be24(pb); /* buffer size db */
397
        get_be32(pb); /* max bitrate */
398
        get_be32(pb); /* avg bitrate */
399

    
400
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
401
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
402
        len = mp4_read_descr(c, pb, &tag);
403
        if (tag == MP4DecSpecificDescrTag) {
404
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
405
            if((uint64_t)len > (1<<30))
406
                return -1;
407
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
408
            if (!st->codec->extradata)
409
                return AVERROR(ENOMEM);
410
            get_buffer(pb, st->codec->extradata, len);
411
            st->codec->extradata_size = len;
412
            if (st->codec->codec_id == CODEC_ID_AAC) {
413
                MPEG4AudioConfig cfg;
414
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
415
                                         st->codec->extradata_size);
416
                if (cfg.chan_config > 7)
417
                    return -1;
418
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
419
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
420
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
421
                else
422
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
423
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
424
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
425
                        cfg.object_type, cfg.ext_object_type,
426
                        cfg.sample_rate, cfg.ext_sample_rate);
427
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
428
                                                         cfg.object_type)))
429
                    st->codec->codec_id = CODEC_ID_AAC;
430
            }
431
        }
432
    }
433
    return 0;
434
}
435

    
436
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
437
{
438
    const int num = get_be32(pb);
439
    const int den = get_be32(pb);
440
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
441
    if (den != 0) {
442
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
443
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
444
            av_log(c->fc, AV_LOG_WARNING,
445
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
446
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
447
        st->sample_aspect_ratio.num = num;
448
        st->sample_aspect_ratio.den = den;
449
    }
450
    return 0;
451
}
452

    
453
/* this atom contains actual media data */
454
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
455
{
456
    if(atom.size == 0) /* wrong one (MP4) */
457
        return 0;
458
    c->found_mdat=1;
459
    return 0; /* now go for moov */
460
}
461

    
462
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
463
{
464
    uint32_t type = get_le32(pb);
465

    
466
    if (type != MKTAG('q','t',' ',' '))
467
        c->isom = 1;
468
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
469
    get_be32(pb); /* minor version */
470
    url_fskip(pb, atom.size - 8);
471
    return 0;
472
}
473

    
474
/* this atom should contain all header atoms */
475
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
476
{
477
    if (mov_read_default(c, pb, atom) < 0)
478
        return -1;
479
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
480
    /* so we don't parse the whole file if over a network */
481
    c->found_moov=1;
482
    return 0; /* now go for mdat */
483
}
484

    
485
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
486
{
487
    c->fragment.moof_offset = url_ftell(pb) - 8;
488
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
489
    return mov_read_default(c, pb, atom);
490
}
491

    
492
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
493
{
494
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
495
    MOVStreamContext *sc = st->priv_data;
496
    int version = get_byte(pb);
497
    unsigned lang;
498

    
499
    if (version > 1)
500
        return -1; /* unsupported */
501

    
502
    get_be24(pb); /* flags */
503
    if (version == 1) {
504
        get_be64(pb);
505
        get_be64(pb);
506
    } else {
507
        get_be32(pb); /* creation time */
508
        get_be32(pb); /* modification time */
509
    }
510

    
511
    sc->time_scale = get_be32(pb);
512
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
513

    
514
    lang = get_be16(pb); /* language */
515
    ff_mov_lang_to_iso639(lang, st->language);
516
    get_be16(pb); /* quality */
517

    
518
    return 0;
519
}
520

    
521
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
522
{
523
    int version = get_byte(pb); /* version */
524
    get_be24(pb); /* flags */
525

    
526
    if (version == 1) {
527
        get_be64(pb);
528
        get_be64(pb);
529
    } else {
530
        get_be32(pb); /* creation time */
531
        get_be32(pb); /* modification time */
532
    }
533
    c->time_scale = get_be32(pb); /* time scale */
534

    
535
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
536

    
537
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
538
    get_be32(pb); /* preferred scale */
539

    
540
    get_be16(pb); /* preferred volume */
541

    
542
    url_fskip(pb, 10); /* reserved */
543

    
544
    url_fskip(pb, 36); /* display matrix */
545

    
546
    get_be32(pb); /* preview time */
547
    get_be32(pb); /* preview duration */
548
    get_be32(pb); /* poster time */
549
    get_be32(pb); /* selection time */
550
    get_be32(pb); /* selection duration */
551
    get_be32(pb); /* current time */
552
    get_be32(pb); /* next track ID */
553

    
554
    return 0;
555
}
556

    
557
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
558
{
559
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
560

    
561
    if((uint64_t)atom.size > (1<<30))
562
        return -1;
563

    
564
    // currently SVQ3 decoder expect full STSD header - so let's fake it
565
    // this should be fixed and just SMI header should be passed
566
    av_free(st->codec->extradata);
567
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
568
    if (!st->codec->extradata)
569
        return AVERROR(ENOMEM);
570
    st->codec->extradata_size = 0x5a + atom.size;
571
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
572
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
573
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
574
    return 0;
575
}
576

    
577
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
578
{
579
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
580
    int little_endian = get_be16(pb);
581

    
582
    dprintf(c->fc, "enda %d\n", little_endian);
583
    if (little_endian == 1) {
584
        switch (st->codec->codec_id) {
585
        case CODEC_ID_PCM_S24BE:
586
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
587
            break;
588
        case CODEC_ID_PCM_S32BE:
589
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
590
            break;
591
        case CODEC_ID_PCM_F32BE:
592
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
593
            break;
594
        case CODEC_ID_PCM_F64BE:
595
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
596
            break;
597
        default:
598
            break;
599
        }
600
    }
601
    return 0;
602
}
603

    
604
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
605
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
606
{
607
    AVStream *st;
608
    uint64_t size;
609
    uint8_t *buf;
610

    
611
    if (c->fc->nb_streams < 1) // will happen with jp2 files
612
        return 0;
613
    st= c->fc->streams[c->fc->nb_streams-1];
614
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
615
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
616
        return -1;
617
    buf= av_realloc(st->codec->extradata, size);
618
    if(!buf)
619
        return -1;
620
    st->codec->extradata= buf;
621
    buf+= st->codec->extradata_size;
622
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
623
    AV_WB32(       buf    , atom.size + 8);
624
    AV_WL32(       buf + 4, atom.type);
625
    get_buffer(pb, buf + 8, atom.size);
626
    return 0;
627
}
628

    
629
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
630
{
631
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
632

    
633
    if((uint64_t)atom.size > (1<<30))
634
        return -1;
635

    
636
    if (st->codec->codec_id == CODEC_ID_QDM2) {
637
        // pass all frma atom to codec, needed at least for QDM2
638
        av_free(st->codec->extradata);
639
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
640
        if (!st->codec->extradata)
641
            return AVERROR(ENOMEM);
642
        st->codec->extradata_size = atom.size;
643
        get_buffer(pb, st->codec->extradata, atom.size);
644
    } else if (atom.size > 8) { /* to read frma, esds atoms */
645
        if (mov_read_default(c, pb, atom) < 0)
646
            return -1;
647
    } else
648
        url_fskip(pb, atom.size);
649
    return 0;
650
}
651

    
652
/**
653
 * This function reads atom content and puts data in extradata without tag
654
 * nor size unlike mov_read_extradata.
655
 */
656
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
657
{
658
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
659

    
660
    if((uint64_t)atom.size > (1<<30))
661
        return -1;
662

    
663
    av_free(st->codec->extradata);
664
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
665
    if (!st->codec->extradata)
666
        return AVERROR(ENOMEM);
667
    st->codec->extradata_size = atom.size;
668
    get_buffer(pb, st->codec->extradata, atom.size);
669
    return 0;
670
}
671

    
672
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
673
{
674
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
675
    MOVStreamContext *sc = st->priv_data;
676
    unsigned int i, entries;
677

    
678
    get_byte(pb); /* version */
679
    get_be24(pb); /* flags */
680

    
681
    entries = get_be32(pb);
682

    
683
    if(entries >= UINT_MAX/sizeof(int64_t))
684
        return -1;
685

    
686
    sc->chunk_count = entries;
687
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
688
    if (!sc->chunk_offsets)
689
        return -1;
690
    if      (atom.type == MKTAG('s','t','c','o'))
691
        for(i=0; i<entries; i++)
692
            sc->chunk_offsets[i] = get_be32(pb);
693
    else if (atom.type == MKTAG('c','o','6','4'))
694
        for(i=0; i<entries; i++)
695
            sc->chunk_offsets[i] = get_be64(pb);
696
    else
697
        return -1;
698

    
699
    return 0;
700
}
701

    
702
/**
703
 * Compute codec id for 'lpcm' tag.
704
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
705
 */
706
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
707
{
708
    if (flags & 1) { // floating point
709
        if (flags & 2) { // big endian
710
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
711
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
712
        } else {
713
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
714
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
715
        }
716
    } else {
717
        if (flags & 2) {
718
            if      (bps == 8)
719
                // signed integer
720
                if (flags & 4)  return CODEC_ID_PCM_S8;
721
                else            return CODEC_ID_PCM_U8;
722
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
723
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
724
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
725
        } else {
726
            if      (bps == 8)
727
                if (flags & 4)  return CODEC_ID_PCM_S8;
728
                else            return CODEC_ID_PCM_U8;
729
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
730
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
731
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
732
        }
733
    }
734
    return CODEC_ID_NONE;
735
}
736

    
737
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
738
{
739
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
740
    MOVStreamContext *sc = st->priv_data;
741
    int j, entries, pseudo_stream_id;
742

    
743
    get_byte(pb); /* version */
744
    get_be24(pb); /* flags */
745

    
746
    entries = get_be32(pb);
747

    
748
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
749
        //Parsing Sample description table
750
        enum CodecID id;
751
        int dref_id;
752
        MOVAtom a = { 0, 0, 0 };
753
        int64_t start_pos = url_ftell(pb);
754
        int size = get_be32(pb); /* size */
755
        uint32_t format = get_le32(pb); /* data format */
756

    
757
        get_be32(pb); /* reserved */
758
        get_be16(pb); /* reserved */
759
        dref_id = get_be16(pb);
760

    
761
        if (st->codec->codec_tag &&
762
            st->codec->codec_tag != format &&
763
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
764
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
765
           ){
766
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
767
             * export it as a separate AVStream but this needs a few changes
768
             * in the MOV demuxer, patch welcome. */
769
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
770
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
771
            continue;
772
        }
773
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
774
        sc->dref_id= dref_id;
775

    
776
        st->codec->codec_tag = format;
777
        id = codec_get_id(codec_movaudio_tags, format);
778
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
779
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
780

    
781
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
782
            st->codec->codec_type = CODEC_TYPE_AUDIO;
783
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
784
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
785
            id = codec_get_id(codec_movvideo_tags, format);
786
            if (id <= 0)
787
                id = codec_get_id(codec_bmp_tags, format);
788
            if (id > 0)
789
                st->codec->codec_type = CODEC_TYPE_VIDEO;
790
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
791
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
792
                if(id > 0)
793
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
794
            }
795
        }
796

    
797
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
798
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
799
                (format >> 24) & 0xff, st->codec->codec_type);
800

    
801
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
802
            uint8_t codec_name[32];
803
            unsigned int color_depth;
804
            int color_greyscale;
805

    
806
            st->codec->codec_id = id;
807
            get_be16(pb); /* version */
808
            get_be16(pb); /* revision level */
809
            get_be32(pb); /* vendor */
810
            get_be32(pb); /* temporal quality */
811
            get_be32(pb); /* spatial quality */
812

    
813
            st->codec->width = get_be16(pb); /* width */
814
            st->codec->height = get_be16(pb); /* height */
815

    
816
            get_be32(pb); /* horiz resolution */
817
            get_be32(pb); /* vert resolution */
818
            get_be32(pb); /* data size, always 0 */
819
            get_be16(pb); /* frames per samples */
820

    
821
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
822
            if (codec_name[0] <= 31) {
823
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
824
                st->codec->codec_name[codec_name[0]] = 0;
825
            }
826

    
827
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
828
            st->codec->color_table_id = get_be16(pb); /* colortable id */
829
            dprintf(c->fc, "depth %d, ctab id %d\n",
830
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
831
            /* figure out the palette situation */
832
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
833
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
834

    
835
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
836
            if ((color_depth == 2) || (color_depth == 4) ||
837
                (color_depth == 8)) {
838
                /* for palette traversal */
839
                unsigned int color_start, color_count, color_end;
840
                unsigned char r, g, b;
841

    
842
                if (color_greyscale) {
843
                    int color_index, color_dec;
844
                    /* compute the greyscale palette */
845
                    st->codec->bits_per_coded_sample = color_depth;
846
                    color_count = 1 << color_depth;
847
                    color_index = 255;
848
                    color_dec = 256 / (color_count - 1);
849
                    for (j = 0; j < color_count; j++) {
850
                        r = g = b = color_index;
851
                        c->palette_control.palette[j] =
852
                            (r << 16) | (g << 8) | (b);
853
                        color_index -= color_dec;
854
                        if (color_index < 0)
855
                            color_index = 0;
856
                    }
857
                } else if (st->codec->color_table_id) {
858
                    const uint8_t *color_table;
859
                    /* if flag bit 3 is set, use the default palette */
860
                    color_count = 1 << color_depth;
861
                    if (color_depth == 2)
862
                        color_table = ff_qt_default_palette_4;
863
                    else if (color_depth == 4)
864
                        color_table = ff_qt_default_palette_16;
865
                    else
866
                        color_table = ff_qt_default_palette_256;
867

    
868
                    for (j = 0; j < color_count; j++) {
869
                        r = color_table[j * 4 + 0];
870
                        g = color_table[j * 4 + 1];
871
                        b = color_table[j * 4 + 2];
872
                        c->palette_control.palette[j] =
873
                            (r << 16) | (g << 8) | (b);
874
                    }
875
                } else {
876
                    /* load the palette from the file */
877
                    color_start = get_be32(pb);
878
                    color_count = get_be16(pb);
879
                    color_end = get_be16(pb);
880
                    if ((color_start <= 255) &&
881
                        (color_end <= 255)) {
882
                        for (j = color_start; j <= color_end; j++) {
883
                            /* each R, G, or B component is 16 bits;
884
                             * only use the top 8 bits; skip alpha bytes
885
                             * up front */
886
                            get_byte(pb);
887
                            get_byte(pb);
888
                            r = get_byte(pb);
889
                            get_byte(pb);
890
                            g = get_byte(pb);
891
                            get_byte(pb);
892
                            b = get_byte(pb);
893
                            get_byte(pb);
894
                            c->palette_control.palette[j] =
895
                                (r << 16) | (g << 8) | (b);
896
                        }
897
                    }
898
                }
899
                st->codec->palctrl = &c->palette_control;
900
                st->codec->palctrl->palette_changed = 1;
901
            } else
902
                st->codec->palctrl = NULL;
903
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
904
            int bits_per_sample, flags;
905
            uint16_t version = get_be16(pb);
906

    
907
            st->codec->codec_id = id;
908
            get_be16(pb); /* revision level */
909
            get_be32(pb); /* vendor */
910

    
911
            st->codec->channels = get_be16(pb);             /* channel count */
912
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
913
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
914

    
915
            sc->audio_cid = get_be16(pb);
916
            get_be16(pb); /* packet size = 0 */
917

    
918
            st->codec->sample_rate = ((get_be32(pb) >> 16));
919

    
920
            //Read QT version 1 fields. In version 0 these do not exist.
921
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
922
            if(!c->isom) {
923
                if(version==1) {
924
                    sc->samples_per_frame = get_be32(pb);
925
                    get_be32(pb); /* bytes per packet */
926
                    sc->bytes_per_frame = get_be32(pb);
927
                    get_be32(pb); /* bytes per sample */
928
                } else if(version==2) {
929
                    get_be32(pb); /* sizeof struct only */
930
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
931
                    st->codec->channels = get_be32(pb);
932
                    get_be32(pb); /* always 0x7F000000 */
933
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
934
                    flags = get_be32(pb); /* lcpm format specific flag */
935
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
936
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
937
                    if (format == MKTAG('l','p','c','m'))
938
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
939
                }
940
            }
941

    
942
            switch (st->codec->codec_id) {
943
            case CODEC_ID_PCM_S8:
944
            case CODEC_ID_PCM_U8:
945
                if (st->codec->bits_per_coded_sample == 16)
946
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
947
                break;
948
            case CODEC_ID_PCM_S16LE:
949
            case CODEC_ID_PCM_S16BE:
950
                if (st->codec->bits_per_coded_sample == 8)
951
                    st->codec->codec_id = CODEC_ID_PCM_S8;
952
                else if (st->codec->bits_per_coded_sample == 24)
953
                    st->codec->codec_id =
954
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
955
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
956
                break;
957
            /* set values for old format before stsd version 1 appeared */
958
            case CODEC_ID_MACE3:
959
                sc->samples_per_frame = 6;
960
                sc->bytes_per_frame = 2*st->codec->channels;
961
                break;
962
            case CODEC_ID_MACE6:
963
                sc->samples_per_frame = 6;
964
                sc->bytes_per_frame = 1*st->codec->channels;
965
                break;
966
            case CODEC_ID_ADPCM_IMA_QT:
967
                sc->samples_per_frame = 64;
968
                sc->bytes_per_frame = 34*st->codec->channels;
969
                break;
970
            case CODEC_ID_GSM:
971
                sc->samples_per_frame = 160;
972
                sc->bytes_per_frame = 33;
973
                break;
974
            default:
975
                break;
976
            }
977

    
978
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
979
            if (bits_per_sample) {
980
                st->codec->bits_per_coded_sample = bits_per_sample;
981
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
982
            }
983
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
984
            // ttxt stsd contains display flags, justification, background
985
            // color, fonts, and default styles, so fake an atom to read it
986
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
987
            mov_read_glbl(c, pb, fake_atom);
988
            st->codec->codec_id= id;
989
            st->codec->width = sc->width;
990
            st->codec->height = sc->height;
991
        } else {
992
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
993
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
994
        }
995
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
996
        a.size = size - (url_ftell(pb) - start_pos);
997
        if (a.size > 8) {
998
            if (mov_read_default(c, pb, a) < 0)
999
                return -1;
1000
        } else if (a.size > 0)
1001
            url_fskip(pb, a.size);
1002
    }
1003

    
1004
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1005
        st->codec->sample_rate= sc->time_scale;
1006

    
1007
    /* special codec parameters handling */
1008
    switch (st->codec->codec_id) {
1009
#if CONFIG_DV_DEMUXER
1010
    case CODEC_ID_DVAUDIO:
1011
        c->dv_fctx = av_alloc_format_context();
1012
        c->dv_demux = dv_init_demux(c->dv_fctx);
1013
        if (!c->dv_demux) {
1014
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1015
            return -1;
1016
        }
1017
        sc->dv_audio_container = 1;
1018
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1019
        break;
1020
#endif
1021
    /* no ifdef since parameters are always those */
1022
    case CODEC_ID_QCELP:
1023
        st->codec->frame_size= 160;
1024
        st->codec->channels= 1; /* really needed */
1025
        break;
1026
    case CODEC_ID_AMR_NB:
1027
    case CODEC_ID_AMR_WB:
1028
        st->codec->frame_size= sc->samples_per_frame;
1029
        st->codec->channels= 1; /* really needed */
1030
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1031
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1032
            st->codec->sample_rate = 8000;
1033
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1034
            st->codec->sample_rate = 16000;
1035
        break;
1036
    case CODEC_ID_MP2:
1037
    case CODEC_ID_MP3:
1038
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1039
        st->need_parsing = AVSTREAM_PARSE_FULL;
1040
        break;
1041
    case CODEC_ID_GSM:
1042
    case CODEC_ID_ADPCM_MS:
1043
    case CODEC_ID_ADPCM_IMA_WAV:
1044
        st->codec->block_align = sc->bytes_per_frame;
1045
        break;
1046
    case CODEC_ID_ALAC:
1047
        if (st->codec->extradata_size == 36) {
1048
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1049
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1050
        }
1051
        break;
1052
    default:
1053
        break;
1054
    }
1055

    
1056
    return 0;
1057
}
1058

    
1059
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1060
{
1061
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1062
    MOVStreamContext *sc = st->priv_data;
1063
    unsigned int i, entries;
1064

    
1065
    get_byte(pb); /* version */
1066
    get_be24(pb); /* flags */
1067

    
1068
    entries = get_be32(pb);
1069

    
1070
    if(entries >= UINT_MAX / sizeof(*sc->sample_to_chunk))
1071
        return -1;
1072

    
1073
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1074

    
1075
    sc->sample_to_chunk_sz = entries;
1076
    sc->sample_to_chunk = av_malloc(entries * sizeof(*sc->sample_to_chunk));
1077
    if (!sc->sample_to_chunk)
1078
        return -1;
1079
    for(i=0; i<entries; i++) {
1080
        sc->sample_to_chunk[i].first = get_be32(pb);
1081
        sc->sample_to_chunk[i].count = get_be32(pb);
1082
        sc->sample_to_chunk[i].id = get_be32(pb);
1083
    }
1084
    return 0;
1085
}
1086

    
1087
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1088
{
1089
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1090
    MOVStreamContext *sc = st->priv_data;
1091
    unsigned int i, entries;
1092

    
1093
    get_byte(pb); /* version */
1094
    get_be24(pb); /* flags */
1095

    
1096
    entries = get_be32(pb);
1097

    
1098
    if(entries >= UINT_MAX / sizeof(int))
1099
        return -1;
1100

    
1101
    sc->keyframe_count = entries;
1102

    
1103
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1104

    
1105
    sc->keyframes = av_malloc(entries * sizeof(int));
1106
    if (!sc->keyframes)
1107
        return -1;
1108
    for(i=0; i<entries; i++) {
1109
        sc->keyframes[i] = get_be32(pb);
1110
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1111
    }
1112
    return 0;
1113
}
1114

    
1115
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1116
{
1117
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1118
    MOVStreamContext *sc = st->priv_data;
1119
    unsigned int i, entries, sample_size;
1120

    
1121
    get_byte(pb); /* version */
1122
    get_be24(pb); /* flags */
1123

    
1124
    sample_size = get_be32(pb);
1125
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1126
        sc->sample_size = sample_size;
1127
    entries = get_be32(pb);
1128
    if(entries >= UINT_MAX / sizeof(int))
1129
        return -1;
1130

    
1131
    sc->sample_count = entries;
1132
    if (sample_size)
1133
        return 0;
1134

    
1135
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1136

    
1137
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1138
    if (!sc->sample_sizes)
1139
        return -1;
1140
    for(i=0; i<entries; i++)
1141
        sc->sample_sizes[i] = get_be32(pb);
1142
    return 0;
1143
}
1144

    
1145
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1146
{
1147
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1148
    MOVStreamContext *sc = st->priv_data;
1149
    unsigned int i, entries;
1150
    int64_t duration=0;
1151
    int64_t total_sample_count=0;
1152

    
1153
    get_byte(pb); /* version */
1154
    get_be24(pb); /* flags */
1155
    entries = get_be32(pb);
1156
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1157
        return -1;
1158

    
1159
    sc->stts_count = entries;
1160
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1161
    if (!sc->stts_data)
1162
        return -1;
1163
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1164

    
1165
    sc->time_rate=0;
1166

    
1167
    for(i=0; i<entries; i++) {
1168
        int sample_duration;
1169
        int sample_count;
1170

    
1171
        sample_count=get_be32(pb);
1172
        sample_duration = get_be32(pb);
1173
        sc->stts_data[i].count= sample_count;
1174
        sc->stts_data[i].duration= sample_duration;
1175

    
1176
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1177

    
1178
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1179

    
1180
        duration+=(int64_t)sample_duration*sample_count;
1181
        total_sample_count+=sample_count;
1182
    }
1183

    
1184
    st->nb_frames= total_sample_count;
1185
    if(duration)
1186
        st->duration= duration;
1187
    return 0;
1188
}
1189

    
1190
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1191
{
1192
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1193
    MOVStreamContext *sc = st->priv_data;
1194
    unsigned int i, entries;
1195

    
1196
    get_byte(pb); /* version */
1197
    get_be24(pb); /* flags */
1198
    entries = get_be32(pb);
1199
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1200
        return -1;
1201

    
1202
    sc->ctts_count = entries;
1203
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1204
    if (!sc->ctts_data)
1205
        return -1;
1206
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1207

    
1208
    for(i=0; i<entries; i++) {
1209
        int count    =get_be32(pb);
1210
        int duration =get_be32(pb);
1211

    
1212
        if (duration < 0) {
1213
            sc->wrong_dts = 1;
1214
            st->codec->has_b_frames = 1;
1215
        }
1216
        sc->ctts_data[i].count   = count;
1217
        sc->ctts_data[i].duration= duration;
1218

    
1219
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1220
    }
1221
    return 0;
1222
}
1223

    
1224
static void mov_build_index(MOVContext *mov, AVStream *st)
1225
{
1226
    MOVStreamContext *sc = st->priv_data;
1227
    int64_t current_offset;
1228
    int64_t current_dts = 0;
1229
    unsigned int stts_index = 0;
1230
    unsigned int stsc_index = 0;
1231
    unsigned int stss_index = 0;
1232
    unsigned int i, j;
1233

    
1234
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1235
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1236
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1237
        unsigned int current_sample = 0;
1238
        unsigned int stts_sample = 0;
1239
        unsigned int keyframe, sample_size;
1240
        unsigned int distance = 0;
1241
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1242

    
1243
        st->nb_frames = sc->sample_count;
1244
        for (i = 0; i < sc->chunk_count; i++) {
1245
            current_offset = sc->chunk_offsets[i];
1246
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1247
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1248
                stsc_index++;
1249
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1250
                if (current_sample >= sc->sample_count) {
1251
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1252
                    goto out;
1253
                }
1254
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1255
                if (keyframe) {
1256
                    distance = 0;
1257
                    if (stss_index + 1 < sc->keyframe_count)
1258
                        stss_index++;
1259
                }
1260
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1261
                if(sc->pseudo_stream_id == -1 ||
1262
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1263
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1264
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1265
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1266
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1267
                            current_offset, current_dts, sample_size, distance, keyframe);
1268
                }
1269
                current_offset += sample_size;
1270
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1271
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1272
                distance++;
1273
                stts_sample++;
1274
                current_sample++;
1275
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1276
                    stts_sample = 0;
1277
                    stts_index++;
1278
                }
1279
            }
1280
        }
1281
    } else { /* read whole chunk */
1282
        unsigned int chunk_samples, chunk_size, chunk_duration;
1283
        unsigned int frames = 1;
1284
        for (i = 0; i < sc->chunk_count; i++) {
1285
            current_offset = sc->chunk_offsets[i];
1286
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1287
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1288
                stsc_index++;
1289
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1290
            /* get chunk size, beware of alaw/ulaw/mace */
1291
            if (sc->samples_per_frame > 0 &&
1292
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1293
                if (sc->samples_per_frame < 160)
1294
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1295
                else {
1296
                    chunk_size = sc->bytes_per_frame;
1297
                    frames = chunk_samples / sc->samples_per_frame;
1298
                    chunk_samples = sc->samples_per_frame;
1299
                }
1300
            } else
1301
                chunk_size = chunk_samples * sc->sample_size;
1302
            for (j = 0; j < frames; j++) {
1303
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1304
                /* get chunk duration */
1305
                chunk_duration = 0;
1306
                while (chunk_samples > 0) {
1307
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1308
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1309
                        sc->stts_data[stts_index].count -= chunk_samples;
1310
                        break;
1311
                    } else {
1312
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1313
                        chunk_samples -= sc->stts_data[stts_index].count;
1314
                        if (stts_index + 1 < sc->stts_count)
1315
                            stts_index++;
1316
                    }
1317
                }
1318
                current_offset += sc->bytes_per_frame;
1319
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1320
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1321
                        chunk_size, chunk_duration);
1322
                assert(chunk_duration % sc->time_rate == 0);
1323
                current_dts += chunk_duration / sc->time_rate;
1324
            }
1325
        }
1326
    }
1327
 out:
1328
    /* adjust sample count to avindex entries */
1329
    sc->sample_count = st->nb_index_entries;
1330
}
1331

    
1332
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1333
{
1334
    AVStream *st;
1335
    MOVStreamContext *sc;
1336
    int ret;
1337

    
1338
    st = av_new_stream(c->fc, c->fc->nb_streams);
1339
    if (!st) return AVERROR(ENOMEM);
1340
    sc = av_mallocz(sizeof(MOVStreamContext));
1341
    if (!sc) return AVERROR(ENOMEM);
1342

    
1343
    st->priv_data = sc;
1344
    st->codec->codec_type = CODEC_TYPE_DATA;
1345
    st->start_time = 0; /* XXX: check */
1346
    sc->ffindex = st->index;
1347

    
1348
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1349
        return ret;
1350

    
1351
    /* sanity checks */
1352
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1353
                           (!sc->sample_size && !sc->sample_count))){
1354
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1355
               st->index);
1356
        sc->sample_count = 0; //ignore track
1357
        return 0;
1358
    }
1359
    if(!sc->time_rate)
1360
        sc->time_rate=1;
1361
    if(!sc->time_scale)
1362
        sc->time_scale= c->time_scale;
1363
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1364

    
1365
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1366
        !st->codec->frame_size && sc->stts_count == 1)
1367
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1368

    
1369
    if(st->duration != AV_NOPTS_VALUE){
1370
        assert(st->duration % sc->time_rate == 0);
1371
        st->duration /= sc->time_rate;
1372
    }
1373

    
1374
    mov_build_index(c, st);
1375

    
1376
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1377
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1378
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1379
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1380
    } else
1381
        sc->pb = c->fc->pb;
1382

    
1383
    switch (st->codec->codec_id) {
1384
#if CONFIG_H261_DECODER
1385
    case CODEC_ID_H261:
1386
#endif
1387
#if CONFIG_H263_DECODER
1388
    case CODEC_ID_H263:
1389
#endif
1390
#if CONFIG_MPEG4_DECODER
1391
    case CODEC_ID_MPEG4:
1392
#endif
1393
        st->codec->width= 0; /* let decoder init width/height */
1394
        st->codec->height= 0;
1395
        break;
1396
    }
1397

    
1398
    /* Do not need those anymore. */
1399
    av_freep(&sc->chunk_offsets);
1400
    av_freep(&sc->sample_to_chunk);
1401
    av_freep(&sc->sample_sizes);
1402
    av_freep(&sc->keyframes);
1403
    av_freep(&sc->stts_data);
1404

    
1405
    return 0;
1406
}
1407

    
1408
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1409
{
1410
    int ret;
1411
    c->itunes_metadata = 1;
1412
    ret = mov_read_default(c, pb, atom);
1413
    c->itunes_metadata = 0;
1414
    return ret;
1415
}
1416

    
1417
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1418
{
1419
    url_fskip(pb, 4); // version + flags
1420
    atom.size -= 4;
1421
    return mov_read_default(c, pb, atom);
1422
}
1423

    
1424
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1425
{
1426
    get_be32(pb); // type
1427
    get_be32(pb); // unknown
1428
    c->fc->track = get_be32(pb);
1429
    dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track);
1430
    return 0;
1431
}
1432

    
1433
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1434
{
1435
    char *str = NULL;
1436
    int size;
1437
    uint16_t str_size;
1438

    
1439
    if (c->itunes_metadata) {
1440
        int data_size = get_be32(pb);
1441
        int tag = get_le32(pb);
1442
        if (tag == MKTAG('d','a','t','a')) {
1443
            get_be32(pb); // type
1444
            get_be32(pb); // unknown
1445
            str_size = data_size - 16;
1446
            atom.size -= 16;
1447
        } else return 0;
1448
    } else {
1449
        str_size = get_be16(pb); // string length
1450
        get_be16(pb); // language
1451
        atom.size -= 4;
1452
    }
1453
    switch (atom.type) {
1454
    case MKTAG(0xa9,'n','a','m'):
1455
        str = c->fc->title; size = sizeof(c->fc->title); break;
1456
    case MKTAG(0xa9,'A','R','T'):
1457
    case MKTAG(0xa9,'w','r','t'):
1458
        str = c->fc->author; size = sizeof(c->fc->author); break;
1459
    case MKTAG(0xa9,'c','p','y'):
1460
        str = c->fc->copyright; size = sizeof(c->fc->copyright); break;
1461
    case MKTAG(0xa9,'c','m','t'):
1462
    case MKTAG(0xa9,'i','n','f'):
1463
        str = c->fc->comment; size = sizeof(c->fc->comment); break;
1464
    case MKTAG(0xa9,'a','l','b'):
1465
        str = c->fc->album; size = sizeof(c->fc->album); break;
1466
    }
1467
    if (!str)
1468
        return 0;
1469
    if (atom.size < 0)
1470
        return -1;
1471

    
1472
    get_buffer(pb, str, FFMIN3(size, str_size, atom.size));
1473
    dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);
1474
    return 0;
1475
}
1476

    
1477
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1478
{
1479
    int i;
1480
    int width;
1481
    int height;
1482
    int64_t disp_transform[2];
1483
    int display_matrix[3][2];
1484
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1485
    MOVStreamContext *sc = st->priv_data;
1486
    int version = get_byte(pb);
1487

    
1488
    get_be24(pb); /* flags */
1489
    /*
1490
    MOV_TRACK_ENABLED 0x0001
1491
    MOV_TRACK_IN_MOVIE 0x0002
1492
    MOV_TRACK_IN_PREVIEW 0x0004
1493
    MOV_TRACK_IN_POSTER 0x0008
1494
    */
1495

    
1496
    if (version == 1) {
1497
        get_be64(pb);
1498
        get_be64(pb);
1499
    } else {
1500
        get_be32(pb); /* creation time */
1501
        get_be32(pb); /* modification time */
1502
    }
1503
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1504
    get_be32(pb); /* reserved */
1505
    st->start_time = 0; /* check */
1506
    /* highlevel (considering edits) duration in movie timebase */
1507
    (version == 1) ? get_be64(pb) : get_be32(pb);
1508
    get_be32(pb); /* reserved */
1509
    get_be32(pb); /* reserved */
1510

    
1511
    get_be16(pb); /* layer */
1512
    get_be16(pb); /* alternate group */
1513
    get_be16(pb); /* volume */
1514
    get_be16(pb); /* reserved */
1515

    
1516
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1517
    // they're kept in fixed point format through all calculations
1518
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1519
    for (i = 0; i < 3; i++) {
1520
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1521
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1522
        get_be32(pb);           // 2.30 fixed point (not used)
1523
    }
1524

    
1525
    width = get_be32(pb);       // 16.16 fixed point track width
1526
    height = get_be32(pb);      // 16.16 fixed point track height
1527
    sc->width = width >> 16;
1528
    sc->height = height >> 16;
1529

    
1530
    //transform the display width/height according to the matrix
1531
    // skip this if the display matrix is the default identity matrix
1532
    // to keep the same scale, use [width height 1<<16]
1533
    if (width && height &&
1534
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1535
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1536
        display_matrix[2][0]           || display_matrix[2][1])) {
1537
        for (i = 0; i < 2; i++)
1538
            disp_transform[i] =
1539
                (int64_t)  width  * display_matrix[0][i] +
1540
                (int64_t)  height * display_matrix[1][i] +
1541
                ((int64_t) display_matrix[2][i] << 16);
1542

    
1543
        //sample aspect ratio is new width/height divided by old width/height
1544
        st->sample_aspect_ratio = av_d2q(
1545
            ((double) disp_transform[0] * height) /
1546
            ((double) disp_transform[1] * width), INT_MAX);
1547
    }
1548
    return 0;
1549
}
1550

    
1551
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1552
{
1553
    MOVFragment *frag = &c->fragment;
1554
    MOVTrackExt *trex = NULL;
1555
    int flags, track_id, i;
1556

    
1557
    get_byte(pb); /* version */
1558
    flags = get_be24(pb);
1559

    
1560
    track_id = get_be32(pb);
1561
    if (!track_id || track_id > c->fc->nb_streams)
1562
        return -1;
1563
    frag->track_id = track_id;
1564
    for (i = 0; i < c->trex_count; i++)
1565
        if (c->trex_data[i].track_id == frag->track_id) {
1566
            trex = &c->trex_data[i];
1567
            break;
1568
        }
1569
    if (!trex) {
1570
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1571
        return -1;
1572
    }
1573

    
1574
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1575
    else              frag->base_data_offset = frag->moof_offset;
1576
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1577
    else              frag->stsd_id          = trex->stsd_id;
1578

    
1579
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1580
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1581
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1582
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1583
    return 0;
1584
}
1585

    
1586
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1587
{
1588
    MOVTrackExt *trex;
1589

    
1590
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1591
        return -1;
1592
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1593
    if (!c->trex_data)
1594
        return AVERROR(ENOMEM);
1595
    trex = &c->trex_data[c->trex_count++];
1596
    get_byte(pb); /* version */
1597
    get_be24(pb); /* flags */
1598
    trex->track_id = get_be32(pb);
1599
    trex->stsd_id  = get_be32(pb);
1600
    trex->duration = get_be32(pb);
1601
    trex->size     = get_be32(pb);
1602
    trex->flags    = get_be32(pb);
1603
    return 0;
1604
}
1605

    
1606
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1607
{
1608
    MOVFragment *frag = &c->fragment;
1609
    AVStream *st;
1610
    MOVStreamContext *sc;
1611
    uint64_t offset;
1612
    int64_t dts;
1613
    int data_offset = 0;
1614
    unsigned entries, first_sample_flags = frag->flags;
1615
    int flags, distance, i;
1616

    
1617
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1618
        return -1;
1619
    st = c->fc->streams[frag->track_id-1];
1620
    sc = st->priv_data;
1621
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1622
        return 0;
1623
    get_byte(pb); /* version */
1624
    flags = get_be24(pb);
1625
    entries = get_be32(pb);
1626
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1627
    if (flags & 0x001) data_offset        = get_be32(pb);
1628
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1629
    if (flags & 0x800) {
1630
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1631
            return -1;
1632
        sc->ctts_data = av_realloc(sc->ctts_data,
1633
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1634
        if (!sc->ctts_data)
1635
            return AVERROR(ENOMEM);
1636
    }
1637
    dts = st->duration;
1638
    offset = frag->base_data_offset + data_offset;
1639
    distance = 0;
1640
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1641
    for (i = 0; i < entries; i++) {
1642
        unsigned sample_size = frag->size;
1643
        int sample_flags = i ? frag->flags : first_sample_flags;
1644
        unsigned sample_duration = frag->duration;
1645
        int keyframe;
1646

    
1647
        if (flags & 0x100) sample_duration = get_be32(pb);
1648
        if (flags & 0x200) sample_size     = get_be32(pb);
1649
        if (flags & 0x400) sample_flags    = get_be32(pb);
1650
        if (flags & 0x800) {
1651
            sc->ctts_data[sc->ctts_count].count = 1;
1652
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1653
            sc->ctts_count++;
1654
        }
1655
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1656
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1657
            distance = 0;
1658
        av_add_index_entry(st, offset, dts, sample_size, distance,
1659
                           keyframe ? AVINDEX_KEYFRAME : 0);
1660
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1661
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1662
                offset, dts, sample_size, distance, keyframe);
1663
        distance++;
1664
        assert(sample_duration % sc->time_rate == 0);
1665
        dts += sample_duration / sc->time_rate;
1666
        offset += sample_size;
1667
    }
1668
    frag->moof_offset = offset;
1669
    sc->sample_count = st->nb_index_entries;
1670
    st->duration = dts;
1671
    return 0;
1672
}
1673

    
1674
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1675
/* like the files created with Adobe Premiere 5.0, for samples see */
1676
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1677
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1678
{
1679
    int err;
1680

    
1681
    if (atom.size < 8)
1682
        return 0; /* continue */
1683
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1684
        url_fskip(pb, atom.size - 4);
1685
        return 0;
1686
    }
1687
    atom.type = get_le32(pb);
1688
    atom.offset += 8;
1689
    atom.size -= 8;
1690
    if (atom.type != MKTAG('m','d','a','t')) {
1691
        url_fskip(pb, atom.size);
1692
        return 0;
1693
    }
1694
    err = mov_read_mdat(c, pb, atom);
1695
    return err;
1696
}
1697

    
1698
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1699
{
1700
#if CONFIG_ZLIB
1701
    ByteIOContext ctx;
1702
    uint8_t *cmov_data;
1703
    uint8_t *moov_data; /* uncompressed data */
1704
    long cmov_len, moov_len;
1705
    int ret = -1;
1706

    
1707
    get_be32(pb); /* dcom atom */
1708
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1709
        return -1;
1710
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1711
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1712
        return -1;
1713
    }
1714
    get_be32(pb); /* cmvd atom */
1715
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1716
        return -1;
1717
    moov_len = get_be32(pb); /* uncompressed size */
1718
    cmov_len = atom.size - 6 * 4;
1719

    
1720
    cmov_data = av_malloc(cmov_len);
1721
    if (!cmov_data)
1722
        return -1;
1723
    moov_data = av_malloc(moov_len);
1724
    if (!moov_data) {
1725
        av_free(cmov_data);
1726
        return -1;
1727
    }
1728
    get_buffer(pb, cmov_data, cmov_len);
1729
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1730
        goto free_and_return;
1731
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1732
        goto free_and_return;
1733
    atom.type = MKTAG('m','o','o','v');
1734
    atom.offset = 0;
1735
    atom.size = moov_len;
1736
#ifdef DEBUG
1737
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1738
#endif
1739
    ret = mov_read_default(c, &ctx, atom);
1740
free_and_return:
1741
    av_free(moov_data);
1742
    av_free(cmov_data);
1743
    return ret;
1744
#else
1745
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1746
    return -1;
1747
#endif
1748
}
1749

    
1750
/* edit list atom */
1751
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1752
{
1753
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1754
    int i, edit_count;
1755

    
1756
    get_byte(pb); /* version */
1757
    get_be24(pb); /* flags */
1758
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1759

    
1760
    for(i=0; i<edit_count; i++){
1761
        int time;
1762
        get_be32(pb); /* Track duration */
1763
        time = get_be32(pb); /* Media time */
1764
        get_be32(pb); /* Media rate */
1765
        if (time != 0)
1766
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1767
                   "a/v desync might occur, patch welcome\n");
1768
    }
1769
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1770
    return 0;
1771
}
1772

    
1773
static const MOVParseTableEntry mov_default_parse_table[] = {
1774
{ MKTAG('a','v','s','s'), mov_read_extradata },
1775
{ MKTAG('c','o','6','4'), mov_read_stco },
1776
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1777
{ MKTAG('d','i','n','f'), mov_read_default },
1778
{ MKTAG('d','r','e','f'), mov_read_dref },
1779
{ MKTAG('e','d','t','s'), mov_read_default },
1780
{ MKTAG('e','l','s','t'), mov_read_elst },
1781
{ MKTAG('e','n','d','a'), mov_read_enda },
1782
{ MKTAG('f','i','e','l'), mov_read_extradata },
1783
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1784
{ MKTAG('g','l','b','l'), mov_read_glbl },
1785
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1786
{ MKTAG('i','l','s','t'), mov_read_ilst },
1787
{ MKTAG('j','p','2','h'), mov_read_extradata },
1788
{ MKTAG('m','d','a','t'), mov_read_mdat },
1789
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1790
{ MKTAG('m','d','i','a'), mov_read_default },
1791
{ MKTAG('m','e','t','a'), mov_read_meta },
1792
{ MKTAG('m','i','n','f'), mov_read_default },
1793
{ MKTAG('m','o','o','f'), mov_read_moof },
1794
{ MKTAG('m','o','o','v'), mov_read_moov },
1795
{ MKTAG('m','v','e','x'), mov_read_default },
1796
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1797
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1798
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1799
{ MKTAG('a','v','c','C'), mov_read_glbl },
1800
{ MKTAG('p','a','s','p'), mov_read_pasp },
1801
{ MKTAG('s','t','b','l'), mov_read_default },
1802
{ MKTAG('s','t','c','o'), mov_read_stco },
1803
{ MKTAG('s','t','s','c'), mov_read_stsc },
1804
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1805
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1806
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1807
{ MKTAG('s','t','t','s'), mov_read_stts },
1808
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1809
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1810
{ MKTAG('t','r','a','k'), mov_read_trak },
1811
{ MKTAG('t','r','a','f'), mov_read_default },
1812
{ MKTAG('t','r','e','x'), mov_read_trex },
1813
{ MKTAG('t','r','k','n'), mov_read_trkn },
1814
{ MKTAG('t','r','u','n'), mov_read_trun },
1815
{ MKTAG('u','d','t','a'), mov_read_default },
1816
{ MKTAG('w','a','v','e'), mov_read_wave },
1817
{ MKTAG('e','s','d','s'), mov_read_esds },
1818
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1819
{ MKTAG('c','m','o','v'), mov_read_cmov },
1820
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1821
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1822
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1823
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1824
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1825
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1826
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1827
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1828
{ 0, NULL }
1829
};
1830

    
1831
static int mov_probe(AVProbeData *p)
1832
{
1833
    unsigned int offset;
1834
    uint32_t tag;
1835
    int score = 0;
1836

    
1837
    /* check file header */
1838
    offset = 0;
1839
    for(;;) {
1840
        /* ignore invalid offset */
1841
        if ((offset + 8) > (unsigned int)p->buf_size)
1842
            return score;
1843
        tag = AV_RL32(p->buf + offset + 4);
1844
        switch(tag) {
1845
        /* check for obvious tags */
1846
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1847
        case MKTAG('m','o','o','v'):
1848
        case MKTAG('m','d','a','t'):
1849
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1850
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1851
        case MKTAG('f','t','y','p'):
1852
            return AVPROBE_SCORE_MAX;
1853
        /* those are more common words, so rate then a bit less */
1854
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1855
        case MKTAG('w','i','d','e'):
1856
        case MKTAG('f','r','e','e'):
1857
        case MKTAG('j','u','n','k'):
1858
        case MKTAG('p','i','c','t'):
1859
            return AVPROBE_SCORE_MAX - 5;
1860
        case MKTAG(0x82,0x82,0x7f,0x7d):
1861
        case MKTAG('s','k','i','p'):
1862
        case MKTAG('u','u','i','d'):
1863
        case MKTAG('p','r','f','l'):
1864
            offset = AV_RB32(p->buf+offset) + offset;
1865
            /* if we only find those cause probedata is too small at least rate them */
1866
            score = AVPROBE_SCORE_MAX - 50;
1867
            break;
1868
        default:
1869
            /* unrecognized tag */
1870
            return score;
1871
        }
1872
    }
1873
    return score;
1874
}
1875

    
1876
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1877
{
1878
    MOVContext *mov = s->priv_data;
1879
    ByteIOContext *pb = s->pb;
1880
    int err;
1881
    MOVAtom atom = { 0, 0, 0 };
1882

    
1883
    mov->fc = s;
1884
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1885
    if(!url_is_streamed(pb))
1886
        atom.size = url_fsize(pb);
1887
    else
1888
        atom.size = INT64_MAX;
1889

    
1890
    /* check MOV header */
1891
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1892
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1893
        return err;
1894
    }
1895
    if (!mov->found_moov) {
1896
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1897
        return -1;
1898
    }
1899
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1900

    
1901
    return 0;
1902
}
1903

    
1904
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1905
{
1906
    MOVContext *mov = s->priv_data;
1907
    MOVStreamContext *sc = 0;
1908
    AVIndexEntry *sample = 0;
1909
    int64_t best_dts = INT64_MAX;
1910
    int i;
1911
 retry:
1912
    for (i = 0; i < s->nb_streams; i++) {
1913
        AVStream *st = s->streams[i];
1914
        MOVStreamContext *msc = st->priv_data;
1915
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1916
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1917
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1918
                                     AV_TIME_BASE, msc->time_scale);
1919
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1920
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1921
                (!url_is_streamed(s->pb) &&
1922
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1923
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1924
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1925
                sample = current_sample;
1926
                best_dts = dts;
1927
                sc = msc;
1928
            }
1929
        }
1930
    }
1931
    if (!sample) {
1932
        mov->found_mdat = 0;
1933
        if (!url_is_streamed(s->pb) ||
1934
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1935
            url_feof(s->pb))
1936
            return -1;
1937
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1938
        goto retry;
1939
    }
1940
    /* must be done just before reading, to avoid infinite loop on sample */
1941
    sc->current_sample++;
1942
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1943
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1944
               sc->ffindex, sample->pos);
1945
        return -1;
1946
    }
1947
    av_get_packet(sc->pb, pkt, sample->size);
1948
#if CONFIG_DV_DEMUXER
1949
    if (mov->dv_demux && sc->dv_audio_container) {
1950
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1951
        av_free(pkt->data);
1952
        pkt->size = 0;
1953
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1954
            return -1;
1955
    }
1956
#endif
1957
    pkt->stream_index = sc->ffindex;
1958
    pkt->dts = sample->timestamp;
1959
    if (sc->ctts_data) {
1960
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1961
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1962
        /* update ctts context */
1963
        sc->sample_to_ctime_sample++;
1964
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1965
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1966
            sc->sample_to_ctime_index++;
1967
            sc->sample_to_ctime_sample = 0;
1968
        }
1969
        if (sc->wrong_dts)
1970
            pkt->dts = AV_NOPTS_VALUE;
1971
    } else {
1972
        AVStream *st = s->streams[sc->ffindex];
1973
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1974
            st->index_entries[sc->current_sample].timestamp : st->duration;
1975
        pkt->duration = next_dts - pkt->dts;
1976
        pkt->pts = pkt->dts;
1977
    }
1978
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1979
    pkt->pos = sample->pos;
1980
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1981
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1982
    return 0;
1983
}
1984

    
1985
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1986
{
1987
    MOVStreamContext *sc = st->priv_data;
1988
    int sample, time_sample;
1989
    int i;
1990

    
1991
    sample = av_index_search_timestamp(st, timestamp, flags);
1992
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1993
    if (sample < 0) /* not sure what to do */
1994
        return -1;
1995
    sc->current_sample = sample;
1996
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1997
    /* adjust ctts index */
1998
    if (sc->ctts_data) {
1999
        time_sample = 0;
2000
        for (i = 0; i < sc->ctts_count; i++) {
2001
            int next = time_sample + sc->ctts_data[i].count;
2002
            if (next > sc->current_sample) {
2003
                sc->sample_to_ctime_index = i;
2004
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
2005
                break;
2006
            }
2007
            time_sample = next;
2008
        }
2009
    }
2010
    return sample;
2011
}
2012

    
2013
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2014
{
2015
    AVStream *st;
2016
    int64_t seek_timestamp, timestamp;
2017
    int sample;
2018
    int i;
2019

    
2020
    if (stream_index >= s->nb_streams)
2021
        return -1;
2022
    if (sample_time < 0)
2023
        sample_time = 0;
2024

    
2025
    st = s->streams[stream_index];
2026
    sample = mov_seek_stream(st, sample_time, flags);
2027
    if (sample < 0)
2028
        return -1;
2029

    
2030
    /* adjust seek timestamp to found sample timestamp */
2031
    seek_timestamp = st->index_entries[sample].timestamp;
2032

    
2033
    for (i = 0; i < s->nb_streams; i++) {
2034
        st = s->streams[i];
2035
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2036
            continue;
2037

    
2038
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2039
        mov_seek_stream(st, timestamp, flags);
2040
    }
2041
    return 0;
2042
}
2043

    
2044
static int mov_read_close(AVFormatContext *s)
2045
{
2046
    int i, j;
2047
    MOVContext *mov = s->priv_data;
2048
    for(i=0; i<s->nb_streams; i++) {
2049
        MOVStreamContext *sc = s->streams[i]->priv_data;
2050
        av_freep(&sc->ctts_data);
2051
        for (j=0; j<sc->drefs_count; j++)
2052
            av_freep(&sc->drefs[j].path);
2053
        av_freep(&sc->drefs);
2054
        if (sc->pb && sc->pb != s->pb)
2055
            url_fclose(sc->pb);
2056
    }
2057
    if(mov->dv_demux){
2058
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
2059
            av_freep(&mov->dv_fctx->streams[i]->codec);
2060
            av_freep(&mov->dv_fctx->streams[i]);
2061
        }
2062
        av_freep(&mov->dv_fctx);
2063
        av_freep(&mov->dv_demux);
2064
    }
2065
    av_freep(&mov->trex_data);
2066
    return 0;
2067
}
2068

    
2069
AVInputFormat mov_demuxer = {
2070
    "mov,mp4,m4a,3gp,3g2,mj2",
2071
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2072
    sizeof(MOVContext),
2073
    mov_probe,
2074
    mov_read_header,
2075
    mov_read_packet,
2076
    mov_read_close,
2077
    mov_read_seek,
2078
};