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ffmpeg / libavformat / mov.c @ 470bce2b

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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
 *
12
 * 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
20
 */
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),
43
 *   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/
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 * when coding this :) (it's a writer anyway)
48
 *
49
 * Reference documents:
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 * 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
} MOVStsc;
73

    
74
typedef struct {
75
    uint32_t type;
76
    char *path;
77
} MOVDref;
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
} MOVAtom;
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
    MOVStts *stts_data;
113
    unsigned int ctts_count;
114
    MOVStts *ctts_data;
115
    unsigned int edit_count; /* number of 'edit' (elst atom) */
116
    unsigned int sample_to_chunk_sz;
117
    MOVStsc *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
    MOVDref *drefs;
135
    int dref_id;
136
    int wrong_dts; ///< dts are wrong due to negative ctts
137
} MOVStreamContext;
138

    
139
typedef struct MOVContext {
140
    AVFormatContext *fc;
141
    int time_scale;
142
    int64_t duration; /* duration of the longest track */
143
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
144
    int found_mdat; /* we suppose we have enough data to read the file */
145
    AVPaletteControl palette_control;
146
    DVDemuxContext *dv_demux;
147
    AVFormatContext *dv_fctx;
148
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
149
    MOVFragment fragment; ///< current fragment in moof atom
150
    MOVTrackExt *trex_data;
151
    unsigned trex_count;
152
    int itunes_metadata; ///< metadata are itunes style
153
} MOVContext;
154

    
155

    
156
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
157

    
158
/* those functions parse an atom */
159
/* return code:
160
  0: continue to parse next atom
161
 <0: error occurred, exit
162
*/
163
/* links atom IDs to parse functions */
164
typedef struct MOVParseTableEntry {
165
    uint32_t type;
166
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
167
} MOVParseTableEntry;
168

    
169
static const MOVParseTableEntry mov_default_parse_table[];
170

    
171
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
172
{
173
    int64_t total_size = 0;
174
    MOVAtom a;
175
    int i;
176
    int err = 0;
177

    
178
    a.offset = atom.offset;
179

    
180
    if (atom.size < 0)
181
        atom.size = INT64_MAX;
182
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
183
        a.size = atom.size;
184
        a.type=0;
185
        if(atom.size >= 8) {
186
            a.size = get_be32(pb);
187
            a.type = get_le32(pb);
188
        }
189
        total_size += 8;
190
        a.offset += 8;
191
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
192
                a.type, (char*)&a.type, a.size, atom.size, total_size);
193
        if (a.size == 1) { /* 64 bit extended size */
194
            a.size = get_be64(pb) - 8;
195
            a.offset += 8;
196
            total_size += 8;
197
        }
198
        if (a.size == 0) {
199
            a.size = atom.size - total_size;
200
            if (a.size <= 8)
201
                break;
202
        }
203
        a.size -= 8;
204
        if(a.size < 0)
205
            break;
206
        a.size = FFMIN(a.size, atom.size - total_size);
207

    
208
        for (i = 0; mov_default_parse_table[i].type != 0
209
             && mov_default_parse_table[i].type != a.type; i++)
210
            /* empty */;
211

    
212
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
213
            url_fskip(pb, a.size);
214
        } else {
215
            int64_t start_pos = url_ftell(pb);
216
            int64_t left;
217
            err = mov_default_parse_table[i].parse(c, pb, a);
218
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
219
                break;
220
            left = a.size - url_ftell(pb) + start_pos;
221
            if (left > 0) /* skip garbage at atom end */
222
                url_fskip(pb, left);
223
        }
224

    
225
        a.offset += a.size;
226
        total_size += a.size;
227
    }
228

    
229
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
230
        url_fskip(pb, atom.size - total_size);
231

    
232
    return err;
233
}
234

    
235
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
236
{
237
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
238
    MOVStreamContext *sc = st->priv_data;
239
    int entries, i, j;
240

    
241
    get_be32(pb); // version + flags
242
    entries = get_be32(pb);
243
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
244
        return -1;
245
    sc->drefs_count = entries;
246
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
247

    
248
    for (i = 0; i < sc->drefs_count; i++) {
249
        MOVDref *dref = &sc->drefs[i];
250
        uint32_t size = get_be32(pb);
251
        int64_t next = url_ftell(pb) + size - 4;
252

    
253
        dref->type = get_le32(pb);
254
        get_be32(pb); // version + flags
255
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
256

    
257
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
258
            /* macintosh alias record */
259
            uint16_t volume_len, len;
260
            char volume[28];
261
            int16_t type;
262

    
263
            url_fskip(pb, 10);
264

    
265
            volume_len = get_byte(pb);
266
            volume_len = FFMIN(volume_len, 27);
267
            get_buffer(pb, volume, 27);
268
            volume[volume_len] = 0;
269
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
270

    
271
            url_fskip(pb, 112);
272

    
273
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
274
                type = get_be16(pb);
275
                len = get_be16(pb);
276
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
277
                if (len&1)
278
                    len += 1;
279
                if (type == 2) { // absolute path
280
                    av_free(dref->path);
281
                    dref->path = av_mallocz(len+1);
282
                    if (!dref->path)
283
                        return AVERROR(ENOMEM);
284
                    get_buffer(pb, dref->path, len);
285
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
286
                        len -= volume_len;
287
                        memmove(dref->path, dref->path+volume_len, len);
288
                        dref->path[len] = 0;
289
                    }
290
                    for (j = 0; j < len; j++)
291
                        if (dref->path[j] == ':')
292
                            dref->path[j] = '/';
293
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
294
                } else
295
                    url_fskip(pb, len);
296
            }
297
        }
298
        url_fseek(pb, next, SEEK_SET);
299
    }
300
    return 0;
301
}
302

    
303
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
304
{
305
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
306
    uint32_t type;
307
    uint32_t ctype;
308

    
309
    get_byte(pb); /* version */
310
    get_be24(pb); /* flags */
311

    
312
    /* component type */
313
    ctype = get_le32(pb);
314
    type = get_le32(pb); /* component subtype */
315

    
316
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
317
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
318
    dprintf(c->fc, "stype= %c%c%c%c\n",
319
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
320
    if(!ctype)
321
        c->isom = 1;
322
    if     (type == MKTAG('v','i','d','e'))
323
        st->codec->codec_type = CODEC_TYPE_VIDEO;
324
    else if(type == MKTAG('s','o','u','n'))
325
        st->codec->codec_type = CODEC_TYPE_AUDIO;
326
    else if(type == MKTAG('m','1','a',' '))
327
        st->codec->codec_id = CODEC_ID_MP2;
328
    else if(type == MKTAG('s','u','b','p')) {
329
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
330
    }
331
    get_be32(pb); /* component  manufacture */
332
    get_be32(pb); /* component flags */
333
    get_be32(pb); /* component flags mask */
334

    
335
    if(atom.size <= 24)
336
        return 0; /* nothing left to read */
337

    
338
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
339
    return 0;
340
}
341

    
342
static int mp4_read_descr_len(ByteIOContext *pb)
343
{
344
    int len = 0;
345
    int count = 4;
346
    while (count--) {
347
        int c = get_byte(pb);
348
        len = (len << 7) | (c & 0x7f);
349
        if (!(c & 0x80))
350
            break;
351
    }
352
    return len;
353
}
354

    
355
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
356
{
357
    int len;
358
    *tag = get_byte(pb);
359
    len = mp4_read_descr_len(pb);
360
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
361
    return len;
362
}
363

    
364
#define MP4ESDescrTag                   0x03
365
#define MP4DecConfigDescrTag            0x04
366
#define MP4DecSpecificDescrTag          0x05
367

    
368
static const AVCodecTag mp4_audio_types[] = {
369
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
370
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
371
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
372
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
373
    { CODEC_ID_NONE,    0 },
374
};
375

    
376
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
377
{
378
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
379
    int tag, len;
380

    
381
    get_be32(pb); /* version + flags */
382
    len = mp4_read_descr(c, pb, &tag);
383
    if (tag == MP4ESDescrTag) {
384
        get_be16(pb); /* ID */
385
        get_byte(pb); /* priority */
386
    } else
387
        get_be16(pb); /* ID */
388

    
389
    len = mp4_read_descr(c, pb, &tag);
390
    if (tag == MP4DecConfigDescrTag) {
391
        int object_type_id = get_byte(pb);
392
        get_byte(pb); /* stream type */
393
        get_be24(pb); /* buffer size db */
394
        get_be32(pb); /* max bitrate */
395
        get_be32(pb); /* avg bitrate */
396

    
397
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
398
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
399
        len = mp4_read_descr(c, pb, &tag);
400
        if (tag == MP4DecSpecificDescrTag) {
401
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
402
            if((uint64_t)len > (1<<30))
403
                return -1;
404
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
405
            if (!st->codec->extradata)
406
                return AVERROR(ENOMEM);
407
            get_buffer(pb, st->codec->extradata, len);
408
            st->codec->extradata_size = len;
409
            if (st->codec->codec_id == CODEC_ID_AAC) {
410
                MPEG4AudioConfig cfg;
411
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
412
                                         st->codec->extradata_size);
413
                if (cfg.chan_config > 7)
414
                    return -1;
415
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
416
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
417
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
418
                else
419
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
420
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
421
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
422
                        cfg.object_type, cfg.ext_object_type,
423
                        cfg.sample_rate, cfg.ext_sample_rate);
424
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
425
                                                         cfg.object_type)))
426
                    st->codec->codec_id = CODEC_ID_AAC;
427
            }
428
        }
429
    }
430
    return 0;
431
}
432

    
433
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
434
{
435
    const int num = get_be32(pb);
436
    const int den = get_be32(pb);
437
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
438
    if (den != 0) {
439
        if ((st->sample_aspect_ratio.den && den != st->sample_aspect_ratio.den) ||
440
            (st->sample_aspect_ratio.num && num != st->sample_aspect_ratio.num))
441
            av_log(c->fc, AV_LOG_WARNING,
442
                   "sample aspect ratio already set, overriding by 'pasp' atom\n");
443
        st->sample_aspect_ratio.num = num;
444
        st->sample_aspect_ratio.den = den;
445
    }
446
    return 0;
447
}
448

    
449
/* this atom contains actual media data */
450
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
451
{
452
    if(atom.size == 0) /* wrong one (MP4) */
453
        return 0;
454
    c->found_mdat=1;
455
    return 0; /* now go for moov */
456
}
457

    
458
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
459
{
460
    uint32_t type = get_le32(pb);
461

    
462
    if (type != MKTAG('q','t',' ',' '))
463
        c->isom = 1;
464
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
465
    get_be32(pb); /* minor version */
466
    url_fskip(pb, atom.size - 8);
467
    return 0;
468
}
469

    
470
/* this atom should contain all header atoms */
471
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
472
{
473
    if (mov_read_default(c, pb, atom) < 0)
474
        return -1;
475
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
476
    /* so we don't parse the whole file if over a network */
477
    c->found_moov=1;
478
    return 0; /* now go for mdat */
479
}
480

    
481
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
482
{
483
    c->fragment.moof_offset = url_ftell(pb) - 8;
484
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
485
    return mov_read_default(c, pb, atom);
486
}
487

    
488
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
489
{
490
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
491
    MOVStreamContext *sc = st->priv_data;
492
    int version = get_byte(pb);
493
    int lang;
494

    
495
    if (version > 1)
496
        return -1; /* unsupported */
497

    
498
    get_be24(pb); /* flags */
499
    if (version == 1) {
500
        get_be64(pb);
501
        get_be64(pb);
502
    } else {
503
        get_be32(pb); /* creation time */
504
        get_be32(pb); /* modification time */
505
    }
506

    
507
    sc->time_scale = get_be32(pb);
508
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
509

    
510
    lang = get_be16(pb); /* language */
511
    ff_mov_lang_to_iso639(lang, st->language);
512
    get_be16(pb); /* quality */
513

    
514
    return 0;
515
}
516

    
517
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
518
{
519
    int version = get_byte(pb); /* version */
520
    get_be24(pb); /* flags */
521

    
522
    if (version == 1) {
523
        get_be64(pb);
524
        get_be64(pb);
525
    } else {
526
        get_be32(pb); /* creation time */
527
        get_be32(pb); /* modification time */
528
    }
529
    c->time_scale = get_be32(pb); /* time scale */
530

    
531
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
532

    
533
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
534
    get_be32(pb); /* preferred scale */
535

    
536
    get_be16(pb); /* preferred volume */
537

    
538
    url_fskip(pb, 10); /* reserved */
539

    
540
    url_fskip(pb, 36); /* display matrix */
541

    
542
    get_be32(pb); /* preview time */
543
    get_be32(pb); /* preview duration */
544
    get_be32(pb); /* poster time */
545
    get_be32(pb); /* selection time */
546
    get_be32(pb); /* selection duration */
547
    get_be32(pb); /* current time */
548
    get_be32(pb); /* next track ID */
549

    
550
    return 0;
551
}
552

    
553
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
554
{
555
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
556

    
557
    if((uint64_t)atom.size > (1<<30))
558
        return -1;
559

    
560
    // currently SVQ3 decoder expect full STSD header - so let's fake it
561
    // this should be fixed and just SMI header should be passed
562
    av_free(st->codec->extradata);
563
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
564
    if (!st->codec->extradata)
565
        return AVERROR(ENOMEM);
566
    st->codec->extradata_size = 0x5a + atom.size;
567
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
568
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
569
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
570
    return 0;
571
}
572

    
573
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
574
{
575
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
576
    int little_endian = get_be16(pb);
577

    
578
    dprintf(c->fc, "enda %d\n", little_endian);
579
    if (little_endian == 1) {
580
        switch (st->codec->codec_id) {
581
        case CODEC_ID_PCM_S24BE:
582
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
583
            break;
584
        case CODEC_ID_PCM_S32BE:
585
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
586
            break;
587
        case CODEC_ID_PCM_F32BE:
588
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
589
            break;
590
        case CODEC_ID_PCM_F64BE:
591
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
592
            break;
593
        default:
594
            break;
595
        }
596
    }
597
    return 0;
598
}
599

    
600
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
601
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
602
{
603
    AVStream *st;
604
    uint64_t size;
605
    uint8_t *buf;
606

    
607
    if (c->fc->nb_streams < 1) // will happen with jp2 files
608
        return 0;
609
    st= c->fc->streams[c->fc->nb_streams-1];
610
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
611
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
612
        return -1;
613
    buf= av_realloc(st->codec->extradata, size);
614
    if(!buf)
615
        return -1;
616
    st->codec->extradata= buf;
617
    buf+= st->codec->extradata_size;
618
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
619
    AV_WB32(       buf    , atom.size + 8);
620
    AV_WL32(       buf + 4, atom.type);
621
    get_buffer(pb, buf + 8, atom.size);
622
    return 0;
623
}
624

    
625
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
626
{
627
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
628

    
629
    if((uint64_t)atom.size > (1<<30))
630
        return -1;
631

    
632
    if (st->codec->codec_id == CODEC_ID_QDM2) {
633
        // pass all frma atom to codec, needed at least for QDM2
634
        av_free(st->codec->extradata);
635
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
636
        if (!st->codec->extradata)
637
            return AVERROR(ENOMEM);
638
        st->codec->extradata_size = atom.size;
639
        get_buffer(pb, st->codec->extradata, atom.size);
640
    } else if (atom.size > 8) { /* to read frma, esds atoms */
641
        if (mov_read_default(c, pb, atom) < 0)
642
            return -1;
643
    } else
644
        url_fskip(pb, atom.size);
645
    return 0;
646
}
647

    
648
/**
649
 * This function reads atom content and puts data in extradata without tag
650
 * nor size unlike mov_read_extradata.
651
 */
652
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
653
{
654
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
655

    
656
    if((uint64_t)atom.size > (1<<30))
657
        return -1;
658

    
659
    av_free(st->codec->extradata);
660
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
661
    if (!st->codec->extradata)
662
        return AVERROR(ENOMEM);
663
    st->codec->extradata_size = atom.size;
664
    get_buffer(pb, st->codec->extradata, atom.size);
665
    return 0;
666
}
667

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

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

    
677
    entries = get_be32(pb);
678

    
679
    if(entries >= UINT_MAX/sizeof(int64_t))
680
        return -1;
681

    
682
    sc->chunk_count = entries;
683
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
684
    if (!sc->chunk_offsets)
685
        return -1;
686
    if      (atom.type == MKTAG('s','t','c','o'))
687
        for(i=0; i<entries; i++)
688
            sc->chunk_offsets[i] = get_be32(pb);
689
    else if (atom.type == MKTAG('c','o','6','4'))
690
        for(i=0; i<entries; i++)
691
            sc->chunk_offsets[i] = get_be64(pb);
692
    else
693
        return -1;
694

    
695
    return 0;
696
}
697

    
698
/**
699
 * Compute codec id for 'lpcm' tag.
700
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
701
 */
702
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
703
{
704
    if (flags & 1) { // floating point
705
        if (flags & 2) { // big endian
706
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
707
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
708
        } else {
709
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
710
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
711
        }
712
    } else {
713
        if (flags & 2) {
714
            if      (bps == 8)
715
                // signed integer
716
                if (flags & 4)  return CODEC_ID_PCM_S8;
717
                else            return CODEC_ID_PCM_U8;
718
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
719
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
720
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
721
        } else {
722
            if      (bps == 8)
723
                if (flags & 4)  return CODEC_ID_PCM_S8;
724
                else            return CODEC_ID_PCM_U8;
725
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
726
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
727
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
728
        }
729
    }
730
    return CODEC_ID_NONE;
731
}
732

    
733
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
734
{
735
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
736
    MOVStreamContext *sc = st->priv_data;
737
    int j, entries, pseudo_stream_id;
738

    
739
    get_byte(pb); /* version */
740
    get_be24(pb); /* flags */
741

    
742
    entries = get_be32(pb);
743

    
744
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
745
        //Parsing Sample description table
746
        enum CodecID id;
747
        int dref_id;
748
        MOVAtom a = { 0, 0, 0 };
749
        int64_t start_pos = url_ftell(pb);
750
        int size = get_be32(pb); /* size */
751
        uint32_t format = get_le32(pb); /* data format */
752

    
753
        get_be32(pb); /* reserved */
754
        get_be16(pb); /* reserved */
755
        dref_id = get_be16(pb);
756

    
757
        if (st->codec->codec_tag &&
758
            st->codec->codec_tag != format &&
759
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
760
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
761
           ){
762
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
763
             * export it as a separate AVStream but this needs a few changes
764
             * in the MOV demuxer, patch welcome. */
765
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
766
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
767
            continue;
768
        }
769
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
770
        sc->dref_id= dref_id;
771

    
772
        st->codec->codec_tag = format;
773
        id = codec_get_id(codec_movaudio_tags, format);
774
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
775
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
776

    
777
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
778
            st->codec->codec_type = CODEC_TYPE_AUDIO;
779
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
780
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
781
            id = codec_get_id(codec_movvideo_tags, format);
782
            if (id <= 0)
783
                id = codec_get_id(codec_bmp_tags, format);
784
            if (id > 0)
785
                st->codec->codec_type = CODEC_TYPE_VIDEO;
786
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
787
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
788
                if(id > 0)
789
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
790
            }
791
        }
792

    
793
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
794
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
795
                (format >> 24) & 0xff, st->codec->codec_type);
796

    
797
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
798
            uint8_t codec_name[32];
799
            unsigned int color_depth;
800
            int color_greyscale;
801

    
802
            st->codec->codec_id = id;
803
            get_be16(pb); /* version */
804
            get_be16(pb); /* revision level */
805
            get_be32(pb); /* vendor */
806
            get_be32(pb); /* temporal quality */
807
            get_be32(pb); /* spatial quality */
808

    
809
            st->codec->width = get_be16(pb); /* width */
810
            st->codec->height = get_be16(pb); /* height */
811

    
812
            get_be32(pb); /* horiz resolution */
813
            get_be32(pb); /* vert resolution */
814
            get_be32(pb); /* data size, always 0 */
815
            get_be16(pb); /* frames per samples */
816

    
817
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
818
            if (codec_name[0] <= 31) {
819
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
820
                st->codec->codec_name[codec_name[0]] = 0;
821
            }
822

    
823
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
824
            st->codec->color_table_id = get_be16(pb); /* colortable id */
825
            dprintf(c->fc, "depth %d, ctab id %d\n",
826
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
827
            /* figure out the palette situation */
828
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
829
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
830

    
831
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
832
            if ((color_depth == 2) || (color_depth == 4) ||
833
                (color_depth == 8)) {
834
                /* for palette traversal */
835
                unsigned int color_start, color_count, color_end;
836
                unsigned char r, g, b;
837

    
838
                if (color_greyscale) {
839
                    int color_index, color_dec;
840
                    /* compute the greyscale palette */
841
                    st->codec->bits_per_coded_sample = color_depth;
842
                    color_count = 1 << color_depth;
843
                    color_index = 255;
844
                    color_dec = 256 / (color_count - 1);
845
                    for (j = 0; j < color_count; j++) {
846
                        r = g = b = color_index;
847
                        c->palette_control.palette[j] =
848
                            (r << 16) | (g << 8) | (b);
849
                        color_index -= color_dec;
850
                        if (color_index < 0)
851
                            color_index = 0;
852
                    }
853
                } else if (st->codec->color_table_id) {
854
                    const uint8_t *color_table;
855
                    /* if flag bit 3 is set, use the default palette */
856
                    color_count = 1 << color_depth;
857
                    if (color_depth == 2)
858
                        color_table = ff_qt_default_palette_4;
859
                    else if (color_depth == 4)
860
                        color_table = ff_qt_default_palette_16;
861
                    else
862
                        color_table = ff_qt_default_palette_256;
863

    
864
                    for (j = 0; j < color_count; j++) {
865
                        r = color_table[j * 4 + 0];
866
                        g = color_table[j * 4 + 1];
867
                        b = color_table[j * 4 + 2];
868
                        c->palette_control.palette[j] =
869
                            (r << 16) | (g << 8) | (b);
870
                    }
871
                } else {
872
                    /* load the palette from the file */
873
                    color_start = get_be32(pb);
874
                    color_count = get_be16(pb);
875
                    color_end = get_be16(pb);
876
                    if ((color_start <= 255) &&
877
                        (color_end <= 255)) {
878
                        for (j = color_start; j <= color_end; j++) {
879
                            /* each R, G, or B component is 16 bits;
880
                             * only use the top 8 bits; skip alpha bytes
881
                             * up front */
882
                            get_byte(pb);
883
                            get_byte(pb);
884
                            r = get_byte(pb);
885
                            get_byte(pb);
886
                            g = get_byte(pb);
887
                            get_byte(pb);
888
                            b = get_byte(pb);
889
                            get_byte(pb);
890
                            c->palette_control.palette[j] =
891
                                (r << 16) | (g << 8) | (b);
892
                        }
893
                    }
894
                }
895
                st->codec->palctrl = &c->palette_control;
896
                st->codec->palctrl->palette_changed = 1;
897
            } else
898
                st->codec->palctrl = NULL;
899
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
900
            int bits_per_sample, flags;
901
            uint16_t version = get_be16(pb);
902

    
903
            st->codec->codec_id = id;
904
            get_be16(pb); /* revision level */
905
            get_be32(pb); /* vendor */
906

    
907
            st->codec->channels = get_be16(pb);             /* channel count */
908
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
909
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
910

    
911
            sc->audio_cid = get_be16(pb);
912
            get_be16(pb); /* packet size = 0 */
913

    
914
            st->codec->sample_rate = ((get_be32(pb) >> 16));
915

    
916
            //Read QT version 1 fields. In version 0 these do not exist.
917
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
918
            if(!c->isom) {
919
                if(version==1) {
920
                    sc->samples_per_frame = get_be32(pb);
921
                    get_be32(pb); /* bytes per packet */
922
                    sc->bytes_per_frame = get_be32(pb);
923
                    get_be32(pb); /* bytes per sample */
924
                } else if(version==2) {
925
                    get_be32(pb); /* sizeof struct only */
926
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
927
                    st->codec->channels = get_be32(pb);
928
                    get_be32(pb); /* always 0x7F000000 */
929
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
930
                    flags = get_be32(pb); /* lcpm format specific flag */
931
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
932
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
933
                    if (format == MKTAG('l','p','c','m'))
934
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
935
                }
936
            }
937

    
938
            switch (st->codec->codec_id) {
939
            case CODEC_ID_PCM_S8:
940
            case CODEC_ID_PCM_U8:
941
                if (st->codec->bits_per_coded_sample == 16)
942
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
943
                break;
944
            case CODEC_ID_PCM_S16LE:
945
            case CODEC_ID_PCM_S16BE:
946
                if (st->codec->bits_per_coded_sample == 8)
947
                    st->codec->codec_id = CODEC_ID_PCM_S8;
948
                else if (st->codec->bits_per_coded_sample == 24)
949
                    st->codec->codec_id =
950
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
951
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
952
                break;
953
            /* set values for old format before stsd version 1 appeared */
954
            case CODEC_ID_MACE3:
955
                sc->samples_per_frame = 6;
956
                sc->bytes_per_frame = 2*st->codec->channels;
957
                break;
958
            case CODEC_ID_MACE6:
959
                sc->samples_per_frame = 6;
960
                sc->bytes_per_frame = 1*st->codec->channels;
961
                break;
962
            case CODEC_ID_ADPCM_IMA_QT:
963
                sc->samples_per_frame = 64;
964
                sc->bytes_per_frame = 34*st->codec->channels;
965
                break;
966
            case CODEC_ID_GSM:
967
                sc->samples_per_frame = 160;
968
                sc->bytes_per_frame = 33;
969
                break;
970
            default:
971
                break;
972
            }
973

    
974
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
975
            if (bits_per_sample) {
976
                st->codec->bits_per_coded_sample = bits_per_sample;
977
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
978
            }
979
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
980
            // ttxt stsd contains display flags, justification, background
981
            // color, fonts, and default styles, so fake an atom to read it
982
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
983
            mov_read_glbl(c, pb, fake_atom);
984
            st->codec->codec_id= id;
985
        } else {
986
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
987
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
988
        }
989
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
990
        a.size = size - (url_ftell(pb) - start_pos);
991
        if (a.size > 8) {
992
            if (mov_read_default(c, pb, a) < 0)
993
                return -1;
994
        } else if (a.size > 0)
995
            url_fskip(pb, a.size);
996
    }
997

    
998
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
999
        st->codec->sample_rate= sc->time_scale;
1000

    
1001
    /* special codec parameters handling */
1002
    switch (st->codec->codec_id) {
1003
#ifdef CONFIG_DV_DEMUXER
1004
    case CODEC_ID_DVAUDIO:
1005
        c->dv_fctx = av_alloc_format_context();
1006
        c->dv_demux = dv_init_demux(c->dv_fctx);
1007
        if (!c->dv_demux) {
1008
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1009
            return -1;
1010
        }
1011
        sc->dv_audio_container = 1;
1012
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1013
        break;
1014
#endif
1015
    /* no ifdef since parameters are always those */
1016
    case CODEC_ID_QCELP:
1017
        st->codec->frame_size= 160;
1018
        st->codec->channels= 1; /* really needed */
1019
        break;
1020
    case CODEC_ID_AMR_NB:
1021
    case CODEC_ID_AMR_WB:
1022
        st->codec->frame_size= sc->samples_per_frame;
1023
        st->codec->channels= 1; /* really needed */
1024
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1025
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1026
            st->codec->sample_rate = 8000;
1027
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1028
            st->codec->sample_rate = 16000;
1029
        break;
1030
    case CODEC_ID_MP2:
1031
    case CODEC_ID_MP3:
1032
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1033
        st->need_parsing = AVSTREAM_PARSE_FULL;
1034
        break;
1035
    case CODEC_ID_GSM:
1036
    case CODEC_ID_ADPCM_MS:
1037
    case CODEC_ID_ADPCM_IMA_WAV:
1038
        st->codec->block_align = sc->bytes_per_frame;
1039
        break;
1040
    case CODEC_ID_ALAC:
1041
        if (st->codec->extradata_size == 36) {
1042
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1043
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1044
        }
1045
        break;
1046
    default:
1047
        break;
1048
    }
1049

    
1050
    return 0;
1051
}
1052

    
1053
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1054
{
1055
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1056
    MOVStreamContext *sc = st->priv_data;
1057
    unsigned int i, entries;
1058

    
1059
    get_byte(pb); /* version */
1060
    get_be24(pb); /* flags */
1061

    
1062
    entries = get_be32(pb);
1063

    
1064
    if(entries >= UINT_MAX / sizeof(*sc->sample_to_chunk))
1065
        return -1;
1066

    
1067
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1068

    
1069
    sc->sample_to_chunk_sz = entries;
1070
    sc->sample_to_chunk = av_malloc(entries * sizeof(*sc->sample_to_chunk));
1071
    if (!sc->sample_to_chunk)
1072
        return -1;
1073
    for(i=0; i<entries; i++) {
1074
        sc->sample_to_chunk[i].first = get_be32(pb);
1075
        sc->sample_to_chunk[i].count = get_be32(pb);
1076
        sc->sample_to_chunk[i].id = get_be32(pb);
1077
    }
1078
    return 0;
1079
}
1080

    
1081
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1082
{
1083
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1084
    MOVStreamContext *sc = st->priv_data;
1085
    unsigned int i, entries;
1086

    
1087
    get_byte(pb); /* version */
1088
    get_be24(pb); /* flags */
1089

    
1090
    entries = get_be32(pb);
1091

    
1092
    if(entries >= UINT_MAX / sizeof(int))
1093
        return -1;
1094

    
1095
    sc->keyframe_count = entries;
1096

    
1097
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1098

    
1099
    sc->keyframes = av_malloc(entries * sizeof(int));
1100
    if (!sc->keyframes)
1101
        return -1;
1102
    for(i=0; i<entries; i++) {
1103
        sc->keyframes[i] = get_be32(pb);
1104
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1105
    }
1106
    return 0;
1107
}
1108

    
1109
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1110
{
1111
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1112
    MOVStreamContext *sc = st->priv_data;
1113
    unsigned int i, entries, sample_size;
1114

    
1115
    get_byte(pb); /* version */
1116
    get_be24(pb); /* flags */
1117

    
1118
    sample_size = get_be32(pb);
1119
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1120
        sc->sample_size = sample_size;
1121
    entries = get_be32(pb);
1122
    if(entries >= UINT_MAX / sizeof(int))
1123
        return -1;
1124

    
1125
    sc->sample_count = entries;
1126
    if (sample_size)
1127
        return 0;
1128

    
1129
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1130

    
1131
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1132
    if (!sc->sample_sizes)
1133
        return -1;
1134
    for(i=0; i<entries; i++)
1135
        sc->sample_sizes[i] = get_be32(pb);
1136
    return 0;
1137
}
1138

    
1139
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1140
{
1141
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1142
    MOVStreamContext *sc = st->priv_data;
1143
    unsigned int i, entries;
1144
    int64_t duration=0;
1145
    int64_t total_sample_count=0;
1146

    
1147
    get_byte(pb); /* version */
1148
    get_be24(pb); /* flags */
1149
    entries = get_be32(pb);
1150
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1151
        return -1;
1152

    
1153
    sc->stts_count = entries;
1154
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1155
    if (!sc->stts_data)
1156
        return -1;
1157
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1158

    
1159
    sc->time_rate=0;
1160

    
1161
    for(i=0; i<entries; i++) {
1162
        int sample_duration;
1163
        int sample_count;
1164

    
1165
        sample_count=get_be32(pb);
1166
        sample_duration = get_be32(pb);
1167
        sc->stts_data[i].count= sample_count;
1168
        sc->stts_data[i].duration= sample_duration;
1169

    
1170
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1171

    
1172
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1173

    
1174
        duration+=(int64_t)sample_duration*sample_count;
1175
        total_sample_count+=sample_count;
1176
    }
1177

    
1178
    st->nb_frames= total_sample_count;
1179
    if(duration)
1180
        st->duration= duration;
1181
    return 0;
1182
}
1183

    
1184
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1185
{
1186
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1187
    MOVStreamContext *sc = st->priv_data;
1188
    unsigned int i, entries;
1189

    
1190
    get_byte(pb); /* version */
1191
    get_be24(pb); /* flags */
1192
    entries = get_be32(pb);
1193
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1194
        return -1;
1195

    
1196
    sc->ctts_count = entries;
1197
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1198
    if (!sc->ctts_data)
1199
        return -1;
1200
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1201

    
1202
    for(i=0; i<entries; i++) {
1203
        int count    =get_be32(pb);
1204
        int duration =get_be32(pb);
1205

    
1206
        if (duration < 0) {
1207
            sc->wrong_dts = 1;
1208
            st->codec->has_b_frames = 1;
1209
        }
1210
        sc->ctts_data[i].count   = count;
1211
        sc->ctts_data[i].duration= duration;
1212

    
1213
        sc->time_rate= ff_gcd(sc->time_rate, FFABS(duration));
1214
    }
1215
    return 0;
1216
}
1217

    
1218
static void mov_build_index(MOVContext *mov, AVStream *st)
1219
{
1220
    MOVStreamContext *sc = st->priv_data;
1221
    int64_t current_offset;
1222
    int64_t current_dts = 0;
1223
    unsigned int stts_index = 0;
1224
    unsigned int stsc_index = 0;
1225
    unsigned int stss_index = 0;
1226
    unsigned int i, j;
1227

    
1228
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1229
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1230
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1231
        unsigned int current_sample = 0;
1232
        unsigned int stts_sample = 0;
1233
        unsigned int keyframe, sample_size;
1234
        unsigned int distance = 0;
1235
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1236

    
1237
        st->nb_frames = sc->sample_count;
1238
        for (i = 0; i < sc->chunk_count; i++) {
1239
            current_offset = sc->chunk_offsets[i];
1240
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1241
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1242
                stsc_index++;
1243
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1244
                if (current_sample >= sc->sample_count) {
1245
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1246
                    goto out;
1247
                }
1248
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1249
                if (keyframe) {
1250
                    distance = 0;
1251
                    if (stss_index + 1 < sc->keyframe_count)
1252
                        stss_index++;
1253
                }
1254
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1255
                if(sc->pseudo_stream_id == -1 ||
1256
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1257
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1258
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1259
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1260
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1261
                            current_offset, current_dts, sample_size, distance, keyframe);
1262
                }
1263
                current_offset += sample_size;
1264
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1265
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1266
                distance++;
1267
                stts_sample++;
1268
                current_sample++;
1269
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1270
                    stts_sample = 0;
1271
                    stts_index++;
1272
                }
1273
            }
1274
        }
1275
    } else { /* read whole chunk */
1276
        unsigned int chunk_samples, chunk_size, chunk_duration;
1277
        unsigned int frames = 1;
1278
        for (i = 0; i < sc->chunk_count; i++) {
1279
            current_offset = sc->chunk_offsets[i];
1280
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1281
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1282
                stsc_index++;
1283
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1284
            /* get chunk size, beware of alaw/ulaw/mace */
1285
            if (sc->samples_per_frame > 0 &&
1286
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1287
                if (sc->samples_per_frame < 160)
1288
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1289
                else {
1290
                    chunk_size = sc->bytes_per_frame;
1291
                    frames = chunk_samples / sc->samples_per_frame;
1292
                    chunk_samples = sc->samples_per_frame;
1293
                }
1294
            } else
1295
                chunk_size = chunk_samples * sc->sample_size;
1296
            for (j = 0; j < frames; j++) {
1297
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1298
                /* get chunk duration */
1299
                chunk_duration = 0;
1300
                while (chunk_samples > 0) {
1301
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1302
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1303
                        sc->stts_data[stts_index].count -= chunk_samples;
1304
                        break;
1305
                    } else {
1306
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1307
                        chunk_samples -= sc->stts_data[stts_index].count;
1308
                        if (stts_index + 1 < sc->stts_count)
1309
                            stts_index++;
1310
                    }
1311
                }
1312
                current_offset += sc->bytes_per_frame;
1313
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1314
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1315
                        chunk_size, chunk_duration);
1316
                assert(chunk_duration % sc->time_rate == 0);
1317
                current_dts += chunk_duration / sc->time_rate;
1318
            }
1319
        }
1320
    }
1321
 out:
1322
    /* adjust sample count to avindex entries */
1323
    sc->sample_count = st->nb_index_entries;
1324
}
1325

    
1326
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1327
{
1328
    AVStream *st;
1329
    MOVStreamContext *sc;
1330
    int ret;
1331

    
1332
    st = av_new_stream(c->fc, c->fc->nb_streams);
1333
    if (!st) return AVERROR(ENOMEM);
1334
    sc = av_mallocz(sizeof(MOVStreamContext));
1335
    if (!sc) return AVERROR(ENOMEM);
1336

    
1337
    st->priv_data = sc;
1338
    st->codec->codec_type = CODEC_TYPE_DATA;
1339
    st->start_time = 0; /* XXX: check */
1340
    sc->ffindex = st->index;
1341

    
1342
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1343
        return ret;
1344

    
1345
    /* sanity checks */
1346
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1347
                           (!sc->sample_size && !sc->sample_count))){
1348
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1349
               st->index);
1350
        sc->sample_count = 0; //ignore track
1351
        return 0;
1352
    }
1353
    if(!sc->time_rate)
1354
        sc->time_rate=1;
1355
    if(!sc->time_scale)
1356
        sc->time_scale= c->time_scale;
1357
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1358

    
1359
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1360
        !st->codec->frame_size && sc->stts_count == 1)
1361
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1362

    
1363
    if(st->duration != AV_NOPTS_VALUE){
1364
        assert(st->duration % sc->time_rate == 0);
1365
        st->duration /= sc->time_rate;
1366
    }
1367

    
1368
    mov_build_index(c, st);
1369

    
1370
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1371
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1372
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1373
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1374
    } else
1375
        sc->pb = c->fc->pb;
1376

    
1377
    switch (st->codec->codec_id) {
1378
#ifdef CONFIG_H261_DECODER
1379
    case CODEC_ID_H261:
1380
#endif
1381
#ifdef CONFIG_H263_DECODER
1382
    case CODEC_ID_H263:
1383
#endif
1384
#ifdef CONFIG_MPEG4_DECODER
1385
    case CODEC_ID_MPEG4:
1386
#endif
1387
        st->codec->width= 0; /* let decoder init width/height */
1388
        st->codec->height= 0;
1389
        break;
1390
    }
1391

    
1392
    /* Do not need those anymore. */
1393
    av_freep(&sc->chunk_offsets);
1394
    av_freep(&sc->sample_to_chunk);
1395
    av_freep(&sc->sample_sizes);
1396
    av_freep(&sc->keyframes);
1397
    av_freep(&sc->stts_data);
1398

    
1399
    return 0;
1400
}
1401

    
1402
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1403
{
1404
    int ret;
1405
    c->itunes_metadata = 1;
1406
    ret = mov_read_default(c, pb, atom);
1407
    c->itunes_metadata = 0;
1408
    return ret;
1409
}
1410

    
1411
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1412
{
1413
    url_fskip(pb, 4); // version + flags
1414
    atom.size -= 4;
1415
    return mov_read_default(c, pb, atom);
1416
}
1417

    
1418
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1419
{
1420
    get_be32(pb); // type
1421
    get_be32(pb); // unknown
1422
    c->fc->track = get_be32(pb);
1423
    dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track);
1424
    return 0;
1425
}
1426

    
1427
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1428
{
1429
    char *str = NULL;
1430
    int size;
1431
    uint16_t str_size;
1432

    
1433
    if (c->itunes_metadata) {
1434
        int data_size = get_be32(pb);
1435
        int tag = get_le32(pb);
1436
        if (tag == MKTAG('d','a','t','a')) {
1437
            get_be32(pb); // type
1438
            get_be32(pb); // unknown
1439
            str_size = data_size - 16;
1440
        } else return 0;
1441
    } else {
1442
        str_size = get_be16(pb); // string length
1443
        get_be16(pb); // language
1444
    }
1445
    switch (atom.type) {
1446
    case MKTAG(0xa9,'n','a','m'):
1447
        str = c->fc->title; size = sizeof(c->fc->title); break;
1448
    case MKTAG(0xa9,'A','R','T'):
1449
    case MKTAG(0xa9,'w','r','t'):
1450
        str = c->fc->author; size = sizeof(c->fc->author); break;
1451
    case MKTAG(0xa9,'c','p','y'):
1452
        str = c->fc->copyright; size = sizeof(c->fc->copyright); break;
1453
    case MKTAG(0xa9,'c','m','t'):
1454
    case MKTAG(0xa9,'i','n','f'):
1455
        str = c->fc->comment; size = sizeof(c->fc->comment); break;
1456
    case MKTAG(0xa9,'a','l','b'):
1457
        str = c->fc->album; size = sizeof(c->fc->album); break;
1458
    }
1459
    if (!str)
1460
        return 0;
1461
    get_buffer(pb, str, FFMIN(size, str_size));
1462
    dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, str);
1463
    return 0;
1464
}
1465

    
1466
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1467
{
1468
    int i;
1469
    int width;
1470
    int height;
1471
    int64_t disp_transform[2];
1472
    int display_matrix[3][2];
1473
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1474
    int version = get_byte(pb);
1475

    
1476
    get_be24(pb); /* flags */
1477
    /*
1478
    MOV_TRACK_ENABLED 0x0001
1479
    MOV_TRACK_IN_MOVIE 0x0002
1480
    MOV_TRACK_IN_PREVIEW 0x0004
1481
    MOV_TRACK_IN_POSTER 0x0008
1482
    */
1483

    
1484
    if (version == 1) {
1485
        get_be64(pb);
1486
        get_be64(pb);
1487
    } else {
1488
        get_be32(pb); /* creation time */
1489
        get_be32(pb); /* modification time */
1490
    }
1491
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1492
    get_be32(pb); /* reserved */
1493
    st->start_time = 0; /* check */
1494
    /* highlevel (considering edits) duration in movie timebase */
1495
    (version == 1) ? get_be64(pb) : get_be32(pb);
1496
    get_be32(pb); /* reserved */
1497
    get_be32(pb); /* reserved */
1498

    
1499
    get_be16(pb); /* layer */
1500
    get_be16(pb); /* alternate group */
1501
    get_be16(pb); /* volume */
1502
    get_be16(pb); /* reserved */
1503

    
1504
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1505
    // they're kept in fixed point format through all calculations
1506
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1507
    for (i = 0; i < 3; i++) {
1508
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1509
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1510
        get_be32(pb);           // 2.30 fixed point (not used)
1511
    }
1512

    
1513
    width = get_be32(pb);       // 16.16 fixed point track width
1514
    height = get_be32(pb);      // 16.16 fixed point track height
1515

    
1516
    //transform the display width/height according to the matrix
1517
    // skip this if the display matrix is the default identity matrix
1518
    // to keep the same scale, use [width height 1<<16]
1519
    if (width && height &&
1520
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1521
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1522
        display_matrix[2][0]           || display_matrix[2][1])) {
1523
        for (i = 0; i < 2; i++)
1524
            disp_transform[i] =
1525
                (int64_t)  width  * display_matrix[0][i] +
1526
                (int64_t)  height * display_matrix[1][i] +
1527
                ((int64_t) display_matrix[2][i] << 16);
1528

    
1529
        //sample aspect ratio is new width/height divided by old width/height
1530
        st->sample_aspect_ratio = av_d2q(
1531
            ((double) disp_transform[0] * height) /
1532
            ((double) disp_transform[1] * width), INT_MAX);
1533
    }
1534
    return 0;
1535
}
1536

    
1537
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1538
{
1539
    MOVFragment *frag = &c->fragment;
1540
    MOVTrackExt *trex = NULL;
1541
    int flags, track_id, i;
1542

    
1543
    get_byte(pb); /* version */
1544
    flags = get_be24(pb);
1545

    
1546
    track_id = get_be32(pb);
1547
    if (!track_id || track_id > c->fc->nb_streams)
1548
        return -1;
1549
    frag->track_id = track_id;
1550
    for (i = 0; i < c->trex_count; i++)
1551
        if (c->trex_data[i].track_id == frag->track_id) {
1552
            trex = &c->trex_data[i];
1553
            break;
1554
        }
1555
    if (!trex) {
1556
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1557
        return -1;
1558
    }
1559

    
1560
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1561
    else              frag->base_data_offset = frag->moof_offset;
1562
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1563
    else              frag->stsd_id          = trex->stsd_id;
1564

    
1565
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1566
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1567
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1568
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1569
    return 0;
1570
}
1571

    
1572
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1573
{
1574
    MOVTrackExt *trex;
1575

    
1576
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1577
        return -1;
1578
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1579
    if (!c->trex_data)
1580
        return AVERROR(ENOMEM);
1581
    trex = &c->trex_data[c->trex_count++];
1582
    get_byte(pb); /* version */
1583
    get_be24(pb); /* flags */
1584
    trex->track_id = get_be32(pb);
1585
    trex->stsd_id  = get_be32(pb);
1586
    trex->duration = get_be32(pb);
1587
    trex->size     = get_be32(pb);
1588
    trex->flags    = get_be32(pb);
1589
    return 0;
1590
}
1591

    
1592
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1593
{
1594
    MOVFragment *frag = &c->fragment;
1595
    AVStream *st;
1596
    MOVStreamContext *sc;
1597
    uint64_t offset;
1598
    int64_t dts;
1599
    int data_offset = 0;
1600
    unsigned entries, first_sample_flags = frag->flags;
1601
    int flags, distance, i;
1602

    
1603
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1604
        return -1;
1605
    st = c->fc->streams[frag->track_id-1];
1606
    sc = st->priv_data;
1607
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1608
        return 0;
1609
    get_byte(pb); /* version */
1610
    flags = get_be24(pb);
1611
    entries = get_be32(pb);
1612
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1613
    if (flags & 0x001) data_offset        = get_be32(pb);
1614
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1615
    if (flags & 0x800) {
1616
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1617
            return -1;
1618
        sc->ctts_data = av_realloc(sc->ctts_data,
1619
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1620
        if (!sc->ctts_data)
1621
            return AVERROR(ENOMEM);
1622
    }
1623
    dts = st->duration;
1624
    offset = frag->base_data_offset + data_offset;
1625
    distance = 0;
1626
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1627
    for (i = 0; i < entries; i++) {
1628
        unsigned sample_size = frag->size;
1629
        int sample_flags = i ? frag->flags : first_sample_flags;
1630
        unsigned sample_duration = frag->duration;
1631
        int keyframe;
1632

    
1633
        if (flags & 0x100) sample_duration = get_be32(pb);
1634
        if (flags & 0x200) sample_size     = get_be32(pb);
1635
        if (flags & 0x400) sample_flags    = get_be32(pb);
1636
        if (flags & 0x800) {
1637
            sc->ctts_data[sc->ctts_count].count = 1;
1638
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1639
            sc->ctts_count++;
1640
        }
1641
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1642
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1643
            distance = 0;
1644
        av_add_index_entry(st, offset, dts, sample_size, distance,
1645
                           keyframe ? AVINDEX_KEYFRAME : 0);
1646
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1647
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1648
                offset, dts, sample_size, distance, keyframe);
1649
        distance++;
1650
        assert(sample_duration % sc->time_rate == 0);
1651
        dts += sample_duration / sc->time_rate;
1652
        offset += sample_size;
1653
    }
1654
    frag->moof_offset = offset;
1655
    sc->sample_count = st->nb_index_entries;
1656
    st->duration = dts;
1657
    return 0;
1658
}
1659

    
1660
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1661
/* like the files created with Adobe Premiere 5.0, for samples see */
1662
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1663
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1664
{
1665
    int err;
1666

    
1667
    if (atom.size < 8)
1668
        return 0; /* continue */
1669
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1670
        url_fskip(pb, atom.size - 4);
1671
        return 0;
1672
    }
1673
    atom.type = get_le32(pb);
1674
    atom.offset += 8;
1675
    atom.size -= 8;
1676
    if (atom.type != MKTAG('m','d','a','t')) {
1677
        url_fskip(pb, atom.size);
1678
        return 0;
1679
    }
1680
    err = mov_read_mdat(c, pb, atom);
1681
    return err;
1682
}
1683

    
1684
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1685
{
1686
#ifdef CONFIG_ZLIB
1687
    ByteIOContext ctx;
1688
    uint8_t *cmov_data;
1689
    uint8_t *moov_data; /* uncompressed data */
1690
    long cmov_len, moov_len;
1691
    int ret = -1;
1692

    
1693
    get_be32(pb); /* dcom atom */
1694
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1695
        return -1;
1696
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1697
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1698
        return -1;
1699
    }
1700
    get_be32(pb); /* cmvd atom */
1701
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1702
        return -1;
1703
    moov_len = get_be32(pb); /* uncompressed size */
1704
    cmov_len = atom.size - 6 * 4;
1705

    
1706
    cmov_data = av_malloc(cmov_len);
1707
    if (!cmov_data)
1708
        return -1;
1709
    moov_data = av_malloc(moov_len);
1710
    if (!moov_data) {
1711
        av_free(cmov_data);
1712
        return -1;
1713
    }
1714
    get_buffer(pb, cmov_data, cmov_len);
1715
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1716
        goto free_and_return;
1717
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1718
        goto free_and_return;
1719
    atom.type = MKTAG('m','o','o','v');
1720
    atom.offset = 0;
1721
    atom.size = moov_len;
1722
#ifdef DEBUG
1723
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1724
#endif
1725
    ret = mov_read_default(c, &ctx, atom);
1726
free_and_return:
1727
    av_free(moov_data);
1728
    av_free(cmov_data);
1729
    return ret;
1730
#else
1731
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1732
    return -1;
1733
#endif
1734
}
1735

    
1736
/* edit list atom */
1737
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1738
{
1739
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1740
    int i, edit_count;
1741

    
1742
    get_byte(pb); /* version */
1743
    get_be24(pb); /* flags */
1744
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1745

    
1746
    for(i=0; i<edit_count; i++){
1747
        int time;
1748
        get_be32(pb); /* Track duration */
1749
        time = get_be32(pb); /* Media time */
1750
        get_be32(pb); /* Media rate */
1751
        if (time != 0)
1752
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1753
                   "a/v desync might occur, patch welcome\n");
1754
    }
1755
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1756
    return 0;
1757
}
1758

    
1759
static const MOVParseTableEntry mov_default_parse_table[] = {
1760
{ MKTAG('a','v','s','s'), mov_read_extradata },
1761
{ MKTAG('c','o','6','4'), mov_read_stco },
1762
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1763
{ MKTAG('d','i','n','f'), mov_read_default },
1764
{ MKTAG('d','r','e','f'), mov_read_dref },
1765
{ MKTAG('e','d','t','s'), mov_read_default },
1766
{ MKTAG('e','l','s','t'), mov_read_elst },
1767
{ MKTAG('e','n','d','a'), mov_read_enda },
1768
{ MKTAG('f','i','e','l'), mov_read_extradata },
1769
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1770
{ MKTAG('g','l','b','l'), mov_read_glbl },
1771
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1772
{ MKTAG('i','l','s','t'), mov_read_ilst },
1773
{ MKTAG('j','p','2','h'), mov_read_extradata },
1774
{ MKTAG('m','d','a','t'), mov_read_mdat },
1775
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1776
{ MKTAG('m','d','i','a'), mov_read_default },
1777
{ MKTAG('m','e','t','a'), mov_read_meta },
1778
{ MKTAG('m','i','n','f'), mov_read_default },
1779
{ MKTAG('m','o','o','f'), mov_read_moof },
1780
{ MKTAG('m','o','o','v'), mov_read_moov },
1781
{ MKTAG('m','v','e','x'), mov_read_default },
1782
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1783
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1784
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1785
{ MKTAG('a','v','c','C'), mov_read_glbl },
1786
{ MKTAG('p','a','s','p'), mov_read_pasp },
1787
{ MKTAG('s','t','b','l'), mov_read_default },
1788
{ MKTAG('s','t','c','o'), mov_read_stco },
1789
{ MKTAG('s','t','s','c'), mov_read_stsc },
1790
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1791
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1792
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1793
{ MKTAG('s','t','t','s'), mov_read_stts },
1794
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1795
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1796
{ MKTAG('t','r','a','k'), mov_read_trak },
1797
{ MKTAG('t','r','a','f'), mov_read_default },
1798
{ MKTAG('t','r','e','x'), mov_read_trex },
1799
{ MKTAG('t','r','k','n'), mov_read_trkn },
1800
{ MKTAG('t','r','u','n'), mov_read_trun },
1801
{ MKTAG('u','d','t','a'), mov_read_default },
1802
{ MKTAG('w','a','v','e'), mov_read_wave },
1803
{ MKTAG('e','s','d','s'), mov_read_esds },
1804
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1805
{ MKTAG('c','m','o','v'), mov_read_cmov },
1806
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1807
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1808
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1809
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1810
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1811
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1812
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1813
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1814
{ 0, NULL }
1815
};
1816

    
1817
static int mov_probe(AVProbeData *p)
1818
{
1819
    unsigned int offset;
1820
    uint32_t tag;
1821
    int score = 0;
1822

    
1823
    /* check file header */
1824
    offset = 0;
1825
    for(;;) {
1826
        /* ignore invalid offset */
1827
        if ((offset + 8) > (unsigned int)p->buf_size)
1828
            return score;
1829
        tag = AV_RL32(p->buf + offset + 4);
1830
        switch(tag) {
1831
        /* check for obvious tags */
1832
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1833
        case MKTAG('m','o','o','v'):
1834
        case MKTAG('m','d','a','t'):
1835
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1836
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1837
        case MKTAG('f','t','y','p'):
1838
            return AVPROBE_SCORE_MAX;
1839
        /* those are more common words, so rate then a bit less */
1840
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1841
        case MKTAG('w','i','d','e'):
1842
        case MKTAG('f','r','e','e'):
1843
        case MKTAG('j','u','n','k'):
1844
        case MKTAG('p','i','c','t'):
1845
            return AVPROBE_SCORE_MAX - 5;
1846
        case MKTAG(0x82,0x82,0x7f,0x7d):
1847
        case MKTAG('s','k','i','p'):
1848
        case MKTAG('u','u','i','d'):
1849
        case MKTAG('p','r','f','l'):
1850
            offset = AV_RB32(p->buf+offset) + offset;
1851
            /* if we only find those cause probedata is too small at least rate them */
1852
            score = AVPROBE_SCORE_MAX - 50;
1853
            break;
1854
        default:
1855
            /* unrecognized tag */
1856
            return score;
1857
        }
1858
    }
1859
    return score;
1860
}
1861

    
1862
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1863
{
1864
    MOVContext *mov = s->priv_data;
1865
    ByteIOContext *pb = s->pb;
1866
    int err;
1867
    MOVAtom atom = { 0, 0, 0 };
1868

    
1869
    mov->fc = s;
1870
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1871
    if(!url_is_streamed(pb))
1872
        atom.size = url_fsize(pb);
1873
    else
1874
        atom.size = INT64_MAX;
1875

    
1876
    /* check MOV header */
1877
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1878
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1879
        return err;
1880
    }
1881
    if (!mov->found_moov) {
1882
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1883
        return -1;
1884
    }
1885
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1886

    
1887
    return 0;
1888
}
1889

    
1890
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1891
{
1892
    MOVContext *mov = s->priv_data;
1893
    MOVStreamContext *sc = 0;
1894
    AVIndexEntry *sample = 0;
1895
    int64_t best_dts = INT64_MAX;
1896
    int i;
1897
 retry:
1898
    for (i = 0; i < s->nb_streams; i++) {
1899
        AVStream *st = s->streams[i];
1900
        MOVStreamContext *msc = st->priv_data;
1901
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1902
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1903
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1904
                                     AV_TIME_BASE, msc->time_scale);
1905
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1906
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1907
                (!url_is_streamed(s->pb) &&
1908
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1909
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1910
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1911
                sample = current_sample;
1912
                best_dts = dts;
1913
                sc = msc;
1914
            }
1915
        }
1916
    }
1917
    if (!sample) {
1918
        mov->found_mdat = 0;
1919
        if (!url_is_streamed(s->pb) ||
1920
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1921
            url_feof(s->pb))
1922
            return -1;
1923
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1924
        goto retry;
1925
    }
1926
    /* must be done just before reading, to avoid infinite loop on sample */
1927
    sc->current_sample++;
1928
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1929
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1930
               sc->ffindex, sample->pos);
1931
        return -1;
1932
    }
1933
    av_get_packet(sc->pb, pkt, sample->size);
1934
#ifdef CONFIG_DV_DEMUXER
1935
    if (mov->dv_demux && sc->dv_audio_container) {
1936
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1937
        av_free(pkt->data);
1938
        pkt->size = 0;
1939
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1940
            return -1;
1941
    }
1942
#endif
1943
    pkt->stream_index = sc->ffindex;
1944
    pkt->dts = sample->timestamp;
1945
    if (sc->ctts_data) {
1946
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1947
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1948
        /* update ctts context */
1949
        sc->sample_to_ctime_sample++;
1950
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1951
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1952
            sc->sample_to_ctime_index++;
1953
            sc->sample_to_ctime_sample = 0;
1954
        }
1955
        if (sc->wrong_dts)
1956
            pkt->dts = AV_NOPTS_VALUE;
1957
    } else {
1958
        AVStream *st = s->streams[sc->ffindex];
1959
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1960
            st->index_entries[sc->current_sample].timestamp : st->duration;
1961
        pkt->duration = next_dts - pkt->dts;
1962
        pkt->pts = pkt->dts;
1963
    }
1964
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1965
    pkt->pos = sample->pos;
1966
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1967
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1968
    return 0;
1969
}
1970

    
1971
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1972
{
1973
    MOVStreamContext *sc = st->priv_data;
1974
    int sample, time_sample;
1975
    int i;
1976

    
1977
    sample = av_index_search_timestamp(st, timestamp, flags);
1978
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1979
    if (sample < 0) /* not sure what to do */
1980
        return -1;
1981
    sc->current_sample = sample;
1982
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1983
    /* adjust ctts index */
1984
    if (sc->ctts_data) {
1985
        time_sample = 0;
1986
        for (i = 0; i < sc->ctts_count; i++) {
1987
            int next = time_sample + sc->ctts_data[i].count;
1988
            if (next > sc->current_sample) {
1989
                sc->sample_to_ctime_index = i;
1990
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1991
                break;
1992
            }
1993
            time_sample = next;
1994
        }
1995
    }
1996
    return sample;
1997
}
1998

    
1999
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2000
{
2001
    AVStream *st;
2002
    int64_t seek_timestamp, timestamp;
2003
    int sample;
2004
    int i;
2005

    
2006
    if (stream_index >= s->nb_streams)
2007
        return -1;
2008

    
2009
    st = s->streams[stream_index];
2010
    sample = mov_seek_stream(st, sample_time, flags);
2011
    if (sample < 0)
2012
        return -1;
2013

    
2014
    /* adjust seek timestamp to found sample timestamp */
2015
    seek_timestamp = st->index_entries[sample].timestamp;
2016

    
2017
    for (i = 0; i < s->nb_streams; i++) {
2018
        st = s->streams[i];
2019
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2020
            continue;
2021

    
2022
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2023
        mov_seek_stream(st, timestamp, flags);
2024
    }
2025
    return 0;
2026
}
2027

    
2028
static int mov_read_close(AVFormatContext *s)
2029
{
2030
    int i, j;
2031
    MOVContext *mov = s->priv_data;
2032
    for(i=0; i<s->nb_streams; i++) {
2033
        MOVStreamContext *sc = s->streams[i]->priv_data;
2034
        av_freep(&sc->ctts_data);
2035
        for (j=0; j<sc->drefs_count; j++)
2036
            av_freep(&sc->drefs[j].path);
2037
        av_freep(&sc->drefs);
2038
        if (sc->pb && sc->pb != s->pb)
2039
            url_fclose(sc->pb);
2040
    }
2041
    if(mov->dv_demux){
2042
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
2043
            av_freep(&mov->dv_fctx->streams[i]->codec);
2044
            av_freep(&mov->dv_fctx->streams[i]);
2045
        }
2046
        av_freep(&mov->dv_fctx);
2047
        av_freep(&mov->dv_demux);
2048
    }
2049
    av_freep(&mov->trex_data);
2050
    return 0;
2051
}
2052

    
2053
AVInputFormat mov_demuxer = {
2054
    "mov,mp4,m4a,3gp,3g2,mj2",
2055
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2056
    sizeof(MOVContext),
2057
    mov_probe,
2058
    mov_read_header,
2059
    mov_read_packet,
2060
    mov_read_close,
2061
    mov_read_seek,
2062
};