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1
/*
2
 * MOV demuxer
3
 * Copyright (c) 2001 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * 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 "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/
54
 *  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;
72
    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 time_offset; /// time offset of the first edit list entry
129
    int current_sample;
130
    unsigned int bytes_per_frame;
131
    unsigned int samples_per_frame;
132
    int dv_audio_container;
133
    int pseudo_stream_id; ///< -1 means demux all ids
134
    int16_t audio_cid; ///< stsd audio compression id
135
    unsigned drefs_count;
136
    MOVDref *drefs;
137
    int dref_id;
138
    int wrong_dts; ///< dts are wrong due to negative ctts
139
    int width;  ///< tkhd width
140
    int height; ///< tkhd height
141
} MOVStreamContext;
142

    
143
typedef struct MOVContext {
144
    AVFormatContext *fc;
145
    int time_scale;
146
    int64_t duration; /* duration of the longest track */
147
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
148
    int found_mdat; /* we suppose we have enough data to read the file */
149
    AVPaletteControl palette_control;
150
    DVDemuxContext *dv_demux;
151
    AVFormatContext *dv_fctx;
152
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
153
    MOVFragment fragment; ///< current fragment in moof atom
154
    MOVTrackExt *trex_data;
155
    unsigned trex_count;
156
    int itunes_metadata; ///< metadata are itunes style
157
} MOVContext;
158

    
159

    
160
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
161

    
162
/* those functions parse an atom */
163
/* return code:
164
  0: continue to parse next atom
165
 <0: error occurred, exit
166
*/
167
/* links atom IDs to parse functions */
168
typedef struct MOVParseTableEntry {
169
    uint32_t type;
170
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
171
} MOVParseTableEntry;
172

    
173
static const MOVParseTableEntry mov_default_parse_table[];
174

    
175
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
176
{
177
    int64_t total_size = 0;
178
    MOVAtom a;
179
    int i;
180
    int err = 0;
181

    
182
    a.offset = atom.offset;
183

    
184
    if (atom.size < 0)
185
        atom.size = INT64_MAX;
186
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
187
        a.size = atom.size;
188
        a.type=0;
189
        if(atom.size >= 8) {
190
            a.size = get_be32(pb);
191
            a.type = get_le32(pb);
192
        }
193
        total_size += 8;
194
        a.offset += 8;
195
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
196
                a.type, (char*)&a.type, a.size, atom.size, total_size);
197
        if (a.size == 1) { /* 64 bit extended size */
198
            a.size = get_be64(pb) - 8;
199
            a.offset += 8;
200
            total_size += 8;
201
        }
202
        if (a.size == 0) {
203
            a.size = atom.size - total_size;
204
            if (a.size <= 8)
205
                break;
206
        }
207
        a.size -= 8;
208
        if(a.size < 0)
209
            break;
210
        a.size = FFMIN(a.size, atom.size - total_size);
211

    
212
        for (i = 0; mov_default_parse_table[i].type != 0
213
             && mov_default_parse_table[i].type != a.type; i++)
214
            /* empty */;
215

    
216
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
217
            url_fskip(pb, a.size);
218
        } else {
219
            int64_t start_pos = url_ftell(pb);
220
            int64_t left;
221
            err = mov_default_parse_table[i].parse(c, pb, a);
222
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
223
                break;
224
            left = a.size - url_ftell(pb) + start_pos;
225
            if (left > 0) /* skip garbage at atom end */
226
                url_fskip(pb, left);
227
        }
228

    
229
        a.offset += a.size;
230
        total_size += a.size;
231
    }
232

    
233
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
234
        url_fskip(pb, atom.size - total_size);
235

    
236
    return err;
237
}
238

    
239
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
240
{
241
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
242
    MOVStreamContext *sc = st->priv_data;
243
    int entries, i, j;
244

    
245
    get_be32(pb); // version + flags
246
    entries = get_be32(pb);
247
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
248
        return -1;
249
    sc->drefs_count = entries;
250
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
251

    
252
    for (i = 0; i < sc->drefs_count; i++) {
253
        MOVDref *dref = &sc->drefs[i];
254
        uint32_t size = get_be32(pb);
255
        int64_t next = url_ftell(pb) + size - 4;
256

    
257
        dref->type = get_le32(pb);
258
        get_be32(pb); // version + flags
259
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
260

    
261
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
262
            /* macintosh alias record */
263
            uint16_t volume_len, len;
264
            char volume[28];
265
            int16_t type;
266

    
267
            url_fskip(pb, 10);
268

    
269
            volume_len = get_byte(pb);
270
            volume_len = FFMIN(volume_len, 27);
271
            get_buffer(pb, volume, 27);
272
            volume[volume_len] = 0;
273
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
274

    
275
            url_fskip(pb, 112);
276

    
277
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
278
                type = get_be16(pb);
279
                len = get_be16(pb);
280
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
281
                if (len&1)
282
                    len += 1;
283
                if (type == 2) { // absolute path
284
                    av_free(dref->path);
285
                    dref->path = av_mallocz(len+1);
286
                    if (!dref->path)
287
                        return AVERROR(ENOMEM);
288
                    get_buffer(pb, dref->path, len);
289
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
290
                        len -= volume_len;
291
                        memmove(dref->path, dref->path+volume_len, len);
292
                        dref->path[len] = 0;
293
                    }
294
                    for (j = 0; j < len; j++)
295
                        if (dref->path[j] == ':')
296
                            dref->path[j] = '/';
297
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
298
                } else
299
                    url_fskip(pb, len);
300
            }
301
        }
302
        url_fseek(pb, next, SEEK_SET);
303
    }
304
    return 0;
305
}
306

    
307
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
308
{
309
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
310
    uint32_t type;
311
    uint32_t ctype;
312

    
313
    get_byte(pb); /* version */
314
    get_be24(pb); /* flags */
315

    
316
    /* component type */
317
    ctype = get_le32(pb);
318
    type = get_le32(pb); /* component subtype */
319

    
320
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
321
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
322
    dprintf(c->fc, "stype= %c%c%c%c\n",
323
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
324
    if(!ctype)
325
        c->isom = 1;
326
    if     (type == MKTAG('v','i','d','e'))
327
        st->codec->codec_type = CODEC_TYPE_VIDEO;
328
    else if(type == MKTAG('s','o','u','n'))
329
        st->codec->codec_type = CODEC_TYPE_AUDIO;
330
    else if(type == MKTAG('m','1','a',' '))
331
        st->codec->codec_id = CODEC_ID_MP2;
332
    else if(type == MKTAG('s','u','b','p')) {
333
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
334
    }
335
    get_be32(pb); /* component  manufacture */
336
    get_be32(pb); /* component flags */
337
    get_be32(pb); /* component flags mask */
338

    
339
    if(atom.size <= 24)
340
        return 0; /* nothing left to read */
341

    
342
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
343
    return 0;
344
}
345

    
346
static int mp4_read_descr_len(ByteIOContext *pb)
347
{
348
    int len = 0;
349
    int count = 4;
350
    while (count--) {
351
        int c = get_byte(pb);
352
        len = (len << 7) | (c & 0x7f);
353
        if (!(c & 0x80))
354
            break;
355
    }
356
    return len;
357
}
358

    
359
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
360
{
361
    int len;
362
    *tag = get_byte(pb);
363
    len = mp4_read_descr_len(pb);
364
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
365
    return len;
366
}
367

    
368
#define MP4ESDescrTag                   0x03
369
#define MP4DecConfigDescrTag            0x04
370
#define MP4DecSpecificDescrTag          0x05
371

    
372
static const AVCodecTag mp4_audio_types[] = {
373
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
374
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
375
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
376
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
377
    { CODEC_ID_NONE,    0 },
378
};
379

    
380
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
381
{
382
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
383
    int tag, len;
384

    
385
    get_be32(pb); /* version + flags */
386
    len = mp4_read_descr(c, pb, &tag);
387
    if (tag == MP4ESDescrTag) {
388
        get_be16(pb); /* ID */
389
        get_byte(pb); /* priority */
390
    } else
391
        get_be16(pb); /* ID */
392

    
393
    len = mp4_read_descr(c, pb, &tag);
394
    if (tag == MP4DecConfigDescrTag) {
395
        int object_type_id = get_byte(pb);
396
        get_byte(pb); /* stream type */
397
        get_be24(pb); /* buffer size db */
398
        get_be32(pb); /* max bitrate */
399
        get_be32(pb); /* avg bitrate */
400

    
401
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
402
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
403
        len = mp4_read_descr(c, pb, &tag);
404
        if (tag == MP4DecSpecificDescrTag) {
405
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
406
            if((uint64_t)len > (1<<30))
407
                return -1;
408
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
409
            if (!st->codec->extradata)
410
                return AVERROR(ENOMEM);
411
            get_buffer(pb, st->codec->extradata, len);
412
            st->codec->extradata_size = len;
413
            if (st->codec->codec_id == CODEC_ID_AAC) {
414
                MPEG4AudioConfig cfg;
415
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
416
                                         st->codec->extradata_size);
417
                if (cfg.chan_config > 7)
418
                    return -1;
419
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
420
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
421
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
422
                else
423
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
424
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
425
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
426
                        cfg.object_type, cfg.ext_object_type,
427
                        cfg.sample_rate, cfg.ext_sample_rate);
428
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
429
                                                         cfg.object_type)))
430
                    st->codec->codec_id = CODEC_ID_AAC;
431
            }
432
        }
433
    }
434
    return 0;
435
}
436

    
437
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
438
{
439
    const int num = get_be32(pb);
440
    const int den = get_be32(pb);
441
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
442
    if (den != 0) {
443
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
444
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
445
            av_log(c->fc, AV_LOG_WARNING,
446
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
447
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
448
        st->sample_aspect_ratio.num = num;
449
        st->sample_aspect_ratio.den = den;
450
    }
451
    return 0;
452
}
453

    
454
/* this atom contains actual media data */
455
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
456
{
457
    if(atom.size == 0) /* wrong one (MP4) */
458
        return 0;
459
    c->found_mdat=1;
460
    return 0; /* now go for moov */
461
}
462

    
463
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
464
{
465
    uint32_t type = get_le32(pb);
466

    
467
    if (type != MKTAG('q','t',' ',' '))
468
        c->isom = 1;
469
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
470
    get_be32(pb); /* minor version */
471
    url_fskip(pb, atom.size - 8);
472
    return 0;
473
}
474

    
475
/* this atom should contain all header atoms */
476
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
477
{
478
    if (mov_read_default(c, pb, atom) < 0)
479
        return -1;
480
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
481
    /* so we don't parse the whole file if over a network */
482
    c->found_moov=1;
483
    return 0; /* now go for mdat */
484
}
485

    
486
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
487
{
488
    c->fragment.moof_offset = url_ftell(pb) - 8;
489
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
490
    return mov_read_default(c, pb, atom);
491
}
492

    
493
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
494
{
495
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
496
    MOVStreamContext *sc = st->priv_data;
497
    int version = get_byte(pb);
498
    unsigned lang;
499

    
500
    if (version > 1)
501
        return -1; /* unsupported */
502

    
503
    get_be24(pb); /* flags */
504
    if (version == 1) {
505
        get_be64(pb);
506
        get_be64(pb);
507
    } else {
508
        get_be32(pb); /* creation time */
509
        get_be32(pb); /* modification time */
510
    }
511

    
512
    sc->time_scale = get_be32(pb);
513
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
514

    
515
    lang = get_be16(pb); /* language */
516
    ff_mov_lang_to_iso639(lang, st->language);
517
    get_be16(pb); /* quality */
518

    
519
    return 0;
520
}
521

    
522
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
523
{
524
    int version = get_byte(pb); /* version */
525
    get_be24(pb); /* flags */
526

    
527
    if (version == 1) {
528
        get_be64(pb);
529
        get_be64(pb);
530
    } else {
531
        get_be32(pb); /* creation time */
532
        get_be32(pb); /* modification time */
533
    }
534
    c->time_scale = get_be32(pb); /* time scale */
535

    
536
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
537

    
538
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
539
    get_be32(pb); /* preferred scale */
540

    
541
    get_be16(pb); /* preferred volume */
542

    
543
    url_fskip(pb, 10); /* reserved */
544

    
545
    url_fskip(pb, 36); /* display matrix */
546

    
547
    get_be32(pb); /* preview time */
548
    get_be32(pb); /* preview duration */
549
    get_be32(pb); /* poster time */
550
    get_be32(pb); /* selection time */
551
    get_be32(pb); /* selection duration */
552
    get_be32(pb); /* current time */
553
    get_be32(pb); /* next track ID */
554

    
555
    return 0;
556
}
557

    
558
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
559
{
560
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
561

    
562
    if((uint64_t)atom.size > (1<<30))
563
        return -1;
564

    
565
    // currently SVQ3 decoder expect full STSD header - so let's fake it
566
    // this should be fixed and just SMI header should be passed
567
    av_free(st->codec->extradata);
568
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
569
    if (!st->codec->extradata)
570
        return AVERROR(ENOMEM);
571
    st->codec->extradata_size = 0x5a + atom.size;
572
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
573
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
574
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
575
    return 0;
576
}
577

    
578
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
579
{
580
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
581
    int little_endian = get_be16(pb);
582

    
583
    dprintf(c->fc, "enda %d\n", little_endian);
584
    if (little_endian == 1) {
585
        switch (st->codec->codec_id) {
586
        case CODEC_ID_PCM_S24BE:
587
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
588
            break;
589
        case CODEC_ID_PCM_S32BE:
590
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
591
            break;
592
        case CODEC_ID_PCM_F32BE:
593
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
594
            break;
595
        case CODEC_ID_PCM_F64BE:
596
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
597
            break;
598
        default:
599
            break;
600
        }
601
    }
602
    return 0;
603
}
604

    
605
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
606
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
607
{
608
    AVStream *st;
609
    uint64_t size;
610
    uint8_t *buf;
611

    
612
    if (c->fc->nb_streams < 1) // will happen with jp2 files
613
        return 0;
614
    st= c->fc->streams[c->fc->nb_streams-1];
615
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
616
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
617
        return -1;
618
    buf= av_realloc(st->codec->extradata, size);
619
    if(!buf)
620
        return -1;
621
    st->codec->extradata= buf;
622
    buf+= st->codec->extradata_size;
623
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
624
    AV_WB32(       buf    , atom.size + 8);
625
    AV_WL32(       buf + 4, atom.type);
626
    get_buffer(pb, buf + 8, atom.size);
627
    return 0;
628
}
629

    
630
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
631
{
632
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
633

    
634
    if((uint64_t)atom.size > (1<<30))
635
        return -1;
636

    
637
    if (st->codec->codec_id == CODEC_ID_QDM2) {
638
        // pass all frma atom to codec, needed at least for QDM2
639
        av_free(st->codec->extradata);
640
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
641
        if (!st->codec->extradata)
642
            return AVERROR(ENOMEM);
643
        st->codec->extradata_size = atom.size;
644
        get_buffer(pb, st->codec->extradata, atom.size);
645
    } else if (atom.size > 8) { /* to read frma, esds atoms */
646
        if (mov_read_default(c, pb, atom) < 0)
647
            return -1;
648
    } else
649
        url_fskip(pb, atom.size);
650
    return 0;
651
}
652

    
653
/**
654
 * This function reads atom content and puts data in extradata without tag
655
 * nor size unlike mov_read_extradata.
656
 */
657
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
658
{
659
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
660

    
661
    if((uint64_t)atom.size > (1<<30))
662
        return -1;
663

    
664
    av_free(st->codec->extradata);
665
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
666
    if (!st->codec->extradata)
667
        return AVERROR(ENOMEM);
668
    st->codec->extradata_size = atom.size;
669
    get_buffer(pb, st->codec->extradata, atom.size);
670
    return 0;
671
}
672

    
673
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
674
{
675
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
676
    MOVStreamContext *sc = st->priv_data;
677
    unsigned int i, entries;
678

    
679
    get_byte(pb); /* version */
680
    get_be24(pb); /* flags */
681

    
682
    entries = get_be32(pb);
683

    
684
    if(entries >= UINT_MAX/sizeof(int64_t))
685
        return -1;
686

    
687
    sc->chunk_count = entries;
688
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
689
    if (!sc->chunk_offsets)
690
        return -1;
691
    if      (atom.type == MKTAG('s','t','c','o'))
692
        for(i=0; i<entries; i++)
693
            sc->chunk_offsets[i] = get_be32(pb);
694
    else if (atom.type == MKTAG('c','o','6','4'))
695
        for(i=0; i<entries; i++)
696
            sc->chunk_offsets[i] = get_be64(pb);
697
    else
698
        return -1;
699

    
700
    return 0;
701
}
702

    
703
/**
704
 * Compute codec id for 'lpcm' tag.
705
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
706
 */
707
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
708
{
709
    if (flags & 1) { // floating point
710
        if (flags & 2) { // big endian
711
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
712
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
713
        } else {
714
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
715
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
716
        }
717
    } else {
718
        if (flags & 2) {
719
            if      (bps == 8)
720
                // signed integer
721
                if (flags & 4)  return CODEC_ID_PCM_S8;
722
                else            return CODEC_ID_PCM_U8;
723
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
724
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
725
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
726
        } else {
727
            if      (bps == 8)
728
                if (flags & 4)  return CODEC_ID_PCM_S8;
729
                else            return CODEC_ID_PCM_U8;
730
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
731
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
732
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
733
        }
734
    }
735
    return CODEC_ID_NONE;
736
}
737

    
738
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
739
{
740
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
741
    MOVStreamContext *sc = st->priv_data;
742
    int j, entries, pseudo_stream_id;
743

    
744
    get_byte(pb); /* version */
745
    get_be24(pb); /* flags */
746

    
747
    entries = get_be32(pb);
748

    
749
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
750
        //Parsing Sample description table
751
        enum CodecID id;
752
        int dref_id;
753
        MOVAtom a = { 0, 0, 0 };
754
        int64_t start_pos = url_ftell(pb);
755
        int size = get_be32(pb); /* size */
756
        uint32_t format = get_le32(pb); /* data format */
757

    
758
        get_be32(pb); /* reserved */
759
        get_be16(pb); /* reserved */
760
        dref_id = get_be16(pb);
761

    
762
        if (st->codec->codec_tag &&
763
            st->codec->codec_tag != format &&
764
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
765
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
766
           ){
767
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
768
             * export it as a separate AVStream but this needs a few changes
769
             * in the MOV demuxer, patch welcome. */
770
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
771
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
772
            continue;
773
        }
774
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
775
        sc->dref_id= dref_id;
776

    
777
        st->codec->codec_tag = format;
778
        id = codec_get_id(codec_movaudio_tags, format);
779
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
780
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
781

    
782
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
783
            st->codec->codec_type = CODEC_TYPE_AUDIO;
784
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
785
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
786
            id = codec_get_id(codec_movvideo_tags, format);
787
            if (id <= 0)
788
                id = codec_get_id(codec_bmp_tags, format);
789
            if (id > 0)
790
                st->codec->codec_type = CODEC_TYPE_VIDEO;
791
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
792
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
793
                if(id > 0)
794
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
795
            }
796
        }
797

    
798
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
799
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
800
                (format >> 24) & 0xff, st->codec->codec_type);
801

    
802
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
803
            uint8_t codec_name[32];
804
            unsigned int color_depth;
805
            int color_greyscale;
806

    
807
            st->codec->codec_id = id;
808
            get_be16(pb); /* version */
809
            get_be16(pb); /* revision level */
810
            get_be32(pb); /* vendor */
811
            get_be32(pb); /* temporal quality */
812
            get_be32(pb); /* spatial quality */
813

    
814
            st->codec->width = get_be16(pb); /* width */
815
            st->codec->height = get_be16(pb); /* height */
816

    
817
            get_be32(pb); /* horiz resolution */
818
            get_be32(pb); /* vert resolution */
819
            get_be32(pb); /* data size, always 0 */
820
            get_be16(pb); /* frames per samples */
821

    
822
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
823
            if (codec_name[0] <= 31) {
824
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
825
                st->codec->codec_name[codec_name[0]] = 0;
826
            }
827

    
828
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
829
            st->codec->color_table_id = get_be16(pb); /* colortable id */
830
            dprintf(c->fc, "depth %d, ctab id %d\n",
831
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
832
            /* figure out the palette situation */
833
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
834
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
835

    
836
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
837
            if ((color_depth == 2) || (color_depth == 4) ||
838
                (color_depth == 8)) {
839
                /* for palette traversal */
840
                unsigned int color_start, color_count, color_end;
841
                unsigned char r, g, b;
842

    
843
                if (color_greyscale) {
844
                    int color_index, color_dec;
845
                    /* compute the greyscale palette */
846
                    st->codec->bits_per_coded_sample = color_depth;
847
                    color_count = 1 << color_depth;
848
                    color_index = 255;
849
                    color_dec = 256 / (color_count - 1);
850
                    for (j = 0; j < color_count; j++) {
851
                        r = g = b = color_index;
852
                        c->palette_control.palette[j] =
853
                            (r << 16) | (g << 8) | (b);
854
                        color_index -= color_dec;
855
                        if (color_index < 0)
856
                            color_index = 0;
857
                    }
858
                } else if (st->codec->color_table_id) {
859
                    const uint8_t *color_table;
860
                    /* if flag bit 3 is set, use the default palette */
861
                    color_count = 1 << color_depth;
862
                    if (color_depth == 2)
863
                        color_table = ff_qt_default_palette_4;
864
                    else if (color_depth == 4)
865
                        color_table = ff_qt_default_palette_16;
866
                    else
867
                        color_table = ff_qt_default_palette_256;
868

    
869
                    for (j = 0; j < color_count; j++) {
870
                        r = color_table[j * 4 + 0];
871
                        g = color_table[j * 4 + 1];
872
                        b = color_table[j * 4 + 2];
873
                        c->palette_control.palette[j] =
874
                            (r << 16) | (g << 8) | (b);
875
                    }
876
                } else {
877
                    /* load the palette from the file */
878
                    color_start = get_be32(pb);
879
                    color_count = get_be16(pb);
880
                    color_end = get_be16(pb);
881
                    if ((color_start <= 255) &&
882
                        (color_end <= 255)) {
883
                        for (j = color_start; j <= color_end; j++) {
884
                            /* each R, G, or B component is 16 bits;
885
                             * only use the top 8 bits; skip alpha bytes
886
                             * up front */
887
                            get_byte(pb);
888
                            get_byte(pb);
889
                            r = get_byte(pb);
890
                            get_byte(pb);
891
                            g = get_byte(pb);
892
                            get_byte(pb);
893
                            b = get_byte(pb);
894
                            get_byte(pb);
895
                            c->palette_control.palette[j] =
896
                                (r << 16) | (g << 8) | (b);
897
                        }
898
                    }
899
                }
900
                st->codec->palctrl = &c->palette_control;
901
                st->codec->palctrl->palette_changed = 1;
902
            } else
903
                st->codec->palctrl = NULL;
904
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
905
            int bits_per_sample, flags;
906
            uint16_t version = get_be16(pb);
907

    
908
            st->codec->codec_id = id;
909
            get_be16(pb); /* revision level */
910
            get_be32(pb); /* vendor */
911

    
912
            st->codec->channels = get_be16(pb);             /* channel count */
913
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
914
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
915

    
916
            sc->audio_cid = get_be16(pb);
917
            get_be16(pb); /* packet size = 0 */
918

    
919
            st->codec->sample_rate = ((get_be32(pb) >> 16));
920

    
921
            //Read QT version 1 fields. In version 0 these do not exist.
922
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
923
            if(!c->isom) {
924
                if(version==1) {
925
                    sc->samples_per_frame = get_be32(pb);
926
                    get_be32(pb); /* bytes per packet */
927
                    sc->bytes_per_frame = get_be32(pb);
928
                    get_be32(pb); /* bytes per sample */
929
                } else if(version==2) {
930
                    get_be32(pb); /* sizeof struct only */
931
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
932
                    st->codec->channels = get_be32(pb);
933
                    get_be32(pb); /* always 0x7F000000 */
934
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
935
                    flags = get_be32(pb); /* lcpm format specific flag */
936
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
937
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
938
                    if (format == MKTAG('l','p','c','m'))
939
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
940
                }
941
            }
942

    
943
            switch (st->codec->codec_id) {
944
            case CODEC_ID_PCM_S8:
945
            case CODEC_ID_PCM_U8:
946
                if (st->codec->bits_per_coded_sample == 16)
947
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
948
                break;
949
            case CODEC_ID_PCM_S16LE:
950
            case CODEC_ID_PCM_S16BE:
951
                if (st->codec->bits_per_coded_sample == 8)
952
                    st->codec->codec_id = CODEC_ID_PCM_S8;
953
                else if (st->codec->bits_per_coded_sample == 24)
954
                    st->codec->codec_id =
955
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
956
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
957
                break;
958
            /* set values for old format before stsd version 1 appeared */
959
            case CODEC_ID_MACE3:
960
                sc->samples_per_frame = 6;
961
                sc->bytes_per_frame = 2*st->codec->channels;
962
                break;
963
            case CODEC_ID_MACE6:
964
                sc->samples_per_frame = 6;
965
                sc->bytes_per_frame = 1*st->codec->channels;
966
                break;
967
            case CODEC_ID_ADPCM_IMA_QT:
968
                sc->samples_per_frame = 64;
969
                sc->bytes_per_frame = 34*st->codec->channels;
970
                break;
971
            case CODEC_ID_GSM:
972
                sc->samples_per_frame = 160;
973
                sc->bytes_per_frame = 33;
974
                break;
975
            default:
976
                break;
977
            }
978

    
979
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
980
            if (bits_per_sample) {
981
                st->codec->bits_per_coded_sample = bits_per_sample;
982
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
983
            }
984
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
985
            // ttxt stsd contains display flags, justification, background
986
            // color, fonts, and default styles, so fake an atom to read it
987
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
988
            mov_read_glbl(c, pb, fake_atom);
989
            st->codec->codec_id= id;
990
            st->codec->width = sc->width;
991
            st->codec->height = sc->height;
992
        } else {
993
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
994
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
995
        }
996
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
997
        a.size = size - (url_ftell(pb) - start_pos);
998
        if (a.size > 8) {
999
            if (mov_read_default(c, pb, a) < 0)
1000
                return -1;
1001
        } else if (a.size > 0)
1002
            url_fskip(pb, a.size);
1003
    }
1004

    
1005
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1006
        st->codec->sample_rate= sc->time_scale;
1007

    
1008
    /* special codec parameters handling */
1009
    switch (st->codec->codec_id) {
1010
#if CONFIG_DV_DEMUXER
1011
    case CODEC_ID_DVAUDIO:
1012
        c->dv_fctx = avformat_alloc_context();
1013
        c->dv_demux = dv_init_demux(c->dv_fctx);
1014
        if (!c->dv_demux) {
1015
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1016
            return -1;
1017
        }
1018
        sc->dv_audio_container = 1;
1019
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1020
        break;
1021
#endif
1022
    /* no ifdef since parameters are always those */
1023
    case CODEC_ID_QCELP:
1024
        st->codec->frame_size= 160;
1025
        st->codec->channels= 1; /* really needed */
1026
        break;
1027
    case CODEC_ID_AMR_NB:
1028
    case CODEC_ID_AMR_WB:
1029
        st->codec->frame_size= sc->samples_per_frame;
1030
        st->codec->channels= 1; /* really needed */
1031
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1032
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1033
            st->codec->sample_rate = 8000;
1034
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1035
            st->codec->sample_rate = 16000;
1036
        break;
1037
    case CODEC_ID_MP2:
1038
    case CODEC_ID_MP3:
1039
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1040
        st->need_parsing = AVSTREAM_PARSE_FULL;
1041
        break;
1042
    case CODEC_ID_GSM:
1043
    case CODEC_ID_ADPCM_MS:
1044
    case CODEC_ID_ADPCM_IMA_WAV:
1045
        st->codec->block_align = sc->bytes_per_frame;
1046
        break;
1047
    case CODEC_ID_ALAC:
1048
        if (st->codec->extradata_size == 36) {
1049
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1050
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1051
        }
1052
        break;
1053
    default:
1054
        break;
1055
    }
1056

    
1057
    return 0;
1058
}
1059

    
1060
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1061
{
1062
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1063
    MOVStreamContext *sc = st->priv_data;
1064
    unsigned int i, entries;
1065

    
1066
    get_byte(pb); /* version */
1067
    get_be24(pb); /* flags */
1068

    
1069
    entries = get_be32(pb);
1070

    
1071
    if(entries >= UINT_MAX / sizeof(*sc->sample_to_chunk))
1072
        return -1;
1073

    
1074
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1075

    
1076
    sc->sample_to_chunk_sz = entries;
1077
    sc->sample_to_chunk = av_malloc(entries * sizeof(*sc->sample_to_chunk));
1078
    if (!sc->sample_to_chunk)
1079
        return -1;
1080
    for(i=0; i<entries; i++) {
1081
        sc->sample_to_chunk[i].first = get_be32(pb);
1082
        sc->sample_to_chunk[i].count = get_be32(pb);
1083
        sc->sample_to_chunk[i].id = get_be32(pb);
1084
    }
1085
    return 0;
1086
}
1087

    
1088
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1089
{
1090
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1091
    MOVStreamContext *sc = st->priv_data;
1092
    unsigned int i, entries;
1093

    
1094
    get_byte(pb); /* version */
1095
    get_be24(pb); /* flags */
1096

    
1097
    entries = get_be32(pb);
1098

    
1099
    if(entries >= UINT_MAX / sizeof(int))
1100
        return -1;
1101

    
1102
    sc->keyframe_count = entries;
1103

    
1104
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1105

    
1106
    sc->keyframes = av_malloc(entries * sizeof(int));
1107
    if (!sc->keyframes)
1108
        return -1;
1109
    for(i=0; i<entries; i++) {
1110
        sc->keyframes[i] = get_be32(pb);
1111
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1112
    }
1113
    return 0;
1114
}
1115

    
1116
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1117
{
1118
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1119
    MOVStreamContext *sc = st->priv_data;
1120
    unsigned int i, entries, sample_size;
1121

    
1122
    get_byte(pb); /* version */
1123
    get_be24(pb); /* flags */
1124

    
1125
    sample_size = get_be32(pb);
1126
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1127
        sc->sample_size = sample_size;
1128
    entries = get_be32(pb);
1129
    if(entries >= UINT_MAX / sizeof(int))
1130
        return -1;
1131

    
1132
    sc->sample_count = entries;
1133
    if (sample_size)
1134
        return 0;
1135

    
1136
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1137

    
1138
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1139
    if (!sc->sample_sizes)
1140
        return -1;
1141
    for(i=0; i<entries; i++)
1142
        sc->sample_sizes[i] = get_be32(pb);
1143
    return 0;
1144
}
1145

    
1146
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1147
{
1148
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1149
    MOVStreamContext *sc = st->priv_data;
1150
    unsigned int i, entries;
1151
    int64_t duration=0;
1152
    int64_t total_sample_count=0;
1153

    
1154
    get_byte(pb); /* version */
1155
    get_be24(pb); /* flags */
1156
    entries = get_be32(pb);
1157
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1158
        return -1;
1159

    
1160
    sc->stts_count = entries;
1161
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1162
    if (!sc->stts_data)
1163
        return -1;
1164
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1165

    
1166
    sc->time_rate=0;
1167

    
1168
    for(i=0; i<entries; i++) {
1169
        int sample_duration;
1170
        int sample_count;
1171

    
1172
        sample_count=get_be32(pb);
1173
        sample_duration = get_be32(pb);
1174
        sc->stts_data[i].count= sample_count;
1175
        sc->stts_data[i].duration= sample_duration;
1176

    
1177
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1178

    
1179
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1180

    
1181
        duration+=(int64_t)sample_duration*sample_count;
1182
        total_sample_count+=sample_count;
1183
    }
1184

    
1185
    st->nb_frames= total_sample_count;
1186
    if(duration)
1187
        st->duration= duration;
1188
    return 0;
1189
}
1190

    
1191
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1192
{
1193
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1194
    MOVStreamContext *sc = st->priv_data;
1195
    unsigned int i, entries;
1196

    
1197
    get_byte(pb); /* version */
1198
    get_be24(pb); /* flags */
1199
    entries = get_be32(pb);
1200
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1201
        return -1;
1202

    
1203
    sc->ctts_count = entries;
1204
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1205
    if (!sc->ctts_data)
1206
        return -1;
1207
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1208

    
1209
    for(i=0; i<entries; i++) {
1210
        int count    =get_be32(pb);
1211
        int duration =get_be32(pb);
1212

    
1213
        if (duration < 0) {
1214
            sc->wrong_dts = 1;
1215
            st->codec->has_b_frames = 1;
1216
        }
1217
        sc->ctts_data[i].count   = count;
1218
        sc->ctts_data[i].duration= duration;
1219

    
1220
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1221
    }
1222
    return 0;
1223
}
1224

    
1225
static void mov_build_index(MOVContext *mov, AVStream *st)
1226
{
1227
    MOVStreamContext *sc = st->priv_data;
1228
    int64_t current_offset;
1229
    int64_t current_dts = 0;
1230
    unsigned int stts_index = 0;
1231
    unsigned int stsc_index = 0;
1232
    unsigned int stss_index = 0;
1233
    unsigned int i, j;
1234

    
1235
    /* adjust first dts according to edit list */
1236
    if (sc->time_offset) {
1237
        assert(sc->time_offset % sc->time_rate == 0);
1238
        current_dts = - (sc->time_offset / sc->time_rate);
1239
    }
1240

    
1241
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1242
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1243
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1244
        unsigned int current_sample = 0;
1245
        unsigned int stts_sample = 0;
1246
        unsigned int keyframe, sample_size;
1247
        unsigned int distance = 0;
1248
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1249

    
1250
        st->nb_frames = sc->sample_count;
1251
        for (i = 0; i < sc->chunk_count; i++) {
1252
            current_offset = sc->chunk_offsets[i];
1253
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1254
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1255
                stsc_index++;
1256
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1257
                if (current_sample >= sc->sample_count) {
1258
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1259
                    goto out;
1260
                }
1261
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1262
                if (keyframe) {
1263
                    distance = 0;
1264
                    if (stss_index + 1 < sc->keyframe_count)
1265
                        stss_index++;
1266
                }
1267
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1268
                if(sc->pseudo_stream_id == -1 ||
1269
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1270
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1271
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1272
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1273
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1274
                            current_offset, current_dts, sample_size, distance, keyframe);
1275
                }
1276
                current_offset += sample_size;
1277
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1278
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1279
                distance++;
1280
                stts_sample++;
1281
                current_sample++;
1282
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1283
                    stts_sample = 0;
1284
                    stts_index++;
1285
                }
1286
            }
1287
        }
1288
    } else { /* read whole chunk */
1289
        unsigned int chunk_samples, chunk_size, chunk_duration;
1290
        unsigned int frames = 1;
1291
        for (i = 0; i < sc->chunk_count; i++) {
1292
            current_offset = sc->chunk_offsets[i];
1293
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1294
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1295
                stsc_index++;
1296
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1297
            /* get chunk size, beware of alaw/ulaw/mace */
1298
            if (sc->samples_per_frame > 0 &&
1299
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1300
                if (sc->samples_per_frame < 160)
1301
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1302
                else {
1303
                    chunk_size = sc->bytes_per_frame;
1304
                    frames = chunk_samples / sc->samples_per_frame;
1305
                    chunk_samples = sc->samples_per_frame;
1306
                }
1307
            } else
1308
                chunk_size = chunk_samples * sc->sample_size;
1309
            for (j = 0; j < frames; j++) {
1310
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1311
                /* get chunk duration */
1312
                chunk_duration = 0;
1313
                while (chunk_samples > 0) {
1314
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1315
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1316
                        sc->stts_data[stts_index].count -= chunk_samples;
1317
                        break;
1318
                    } else {
1319
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1320
                        chunk_samples -= sc->stts_data[stts_index].count;
1321
                        if (stts_index + 1 < sc->stts_count)
1322
                            stts_index++;
1323
                    }
1324
                }
1325
                current_offset += sc->bytes_per_frame;
1326
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1327
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1328
                        chunk_size, chunk_duration);
1329
                assert(chunk_duration % sc->time_rate == 0);
1330
                current_dts += chunk_duration / sc->time_rate;
1331
            }
1332
        }
1333
    }
1334
 out:
1335
    /* adjust sample count to avindex entries */
1336
    sc->sample_count = st->nb_index_entries;
1337
}
1338

    
1339
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1340
{
1341
    AVStream *st;
1342
    MOVStreamContext *sc;
1343
    int ret;
1344

    
1345
    st = av_new_stream(c->fc, c->fc->nb_streams);
1346
    if (!st) return AVERROR(ENOMEM);
1347
    sc = av_mallocz(sizeof(MOVStreamContext));
1348
    if (!sc) return AVERROR(ENOMEM);
1349

    
1350
    st->priv_data = sc;
1351
    st->codec->codec_type = CODEC_TYPE_DATA;
1352
    st->start_time = 0; /* XXX: check */
1353
    sc->ffindex = st->index;
1354

    
1355
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1356
        return ret;
1357

    
1358
    /* sanity checks */
1359
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1360
                           (!sc->sample_size && !sc->sample_count))){
1361
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1362
               st->index);
1363
        sc->sample_count = 0; //ignore track
1364
        return 0;
1365
    }
1366
    if(!sc->time_rate)
1367
        sc->time_rate=1;
1368
    if(!sc->time_scale)
1369
        sc->time_scale= c->time_scale;
1370
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1371

    
1372
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1373
        !st->codec->frame_size && sc->stts_count == 1)
1374
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1375

    
1376
    if(st->duration != AV_NOPTS_VALUE){
1377
        assert(st->duration % sc->time_rate == 0);
1378
        st->duration /= sc->time_rate;
1379
    }
1380

    
1381
    mov_build_index(c, st);
1382

    
1383
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1384
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1385
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1386
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1387
    } else
1388
        sc->pb = c->fc->pb;
1389

    
1390
    switch (st->codec->codec_id) {
1391
#if CONFIG_H261_DECODER
1392
    case CODEC_ID_H261:
1393
#endif
1394
#if CONFIG_H263_DECODER
1395
    case CODEC_ID_H263:
1396
#endif
1397
#if CONFIG_MPEG4_DECODER
1398
    case CODEC_ID_MPEG4:
1399
#endif
1400
        st->codec->width= 0; /* let decoder init width/height */
1401
        st->codec->height= 0;
1402
        break;
1403
    }
1404

    
1405
    /* Do not need those anymore. */
1406
    av_freep(&sc->chunk_offsets);
1407
    av_freep(&sc->sample_to_chunk);
1408
    av_freep(&sc->sample_sizes);
1409
    av_freep(&sc->keyframes);
1410
    av_freep(&sc->stts_data);
1411

    
1412
    return 0;
1413
}
1414

    
1415
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1416
{
1417
    int ret;
1418
    c->itunes_metadata = 1;
1419
    ret = mov_read_default(c, pb, atom);
1420
    c->itunes_metadata = 0;
1421
    return ret;
1422
}
1423

    
1424
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1425
{
1426
    url_fskip(pb, 4); // version + flags
1427
    atom.size -= 4;
1428
    return mov_read_default(c, pb, atom);
1429
}
1430

    
1431
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1432
{
1433
    get_be32(pb); // type
1434
    get_be32(pb); // unknown
1435
    c->fc->track = get_be32(pb);
1436
    dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track);
1437
    return 0;
1438
}
1439

    
1440
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1441
{
1442
    char *str = NULL;
1443
    int size;
1444
    uint16_t str_size;
1445

    
1446
    if (c->itunes_metadata) {
1447
        int data_size = get_be32(pb);
1448
        int tag = get_le32(pb);
1449
        if (tag == MKTAG('d','a','t','a')) {
1450
            get_be32(pb); // type
1451
            get_be32(pb); // unknown
1452
            str_size = data_size - 16;
1453
            atom.size -= 16;
1454
        } else return 0;
1455
    } else {
1456
        str_size = get_be16(pb); // string length
1457
        get_be16(pb); // language
1458
        atom.size -= 4;
1459
    }
1460
    switch (atom.type) {
1461
    case MKTAG(0xa9,'n','a','m'):
1462
        str = c->fc->title; size = sizeof(c->fc->title); break;
1463
    case MKTAG(0xa9,'A','R','T'):
1464
    case MKTAG(0xa9,'w','r','t'):
1465
        str = c->fc->author; size = sizeof(c->fc->author); break;
1466
    case MKTAG(0xa9,'c','p','y'):
1467
        str = c->fc->copyright; size = sizeof(c->fc->copyright); break;
1468
    case MKTAG(0xa9,'c','m','t'):
1469
    case MKTAG(0xa9,'i','n','f'):
1470
        str = c->fc->comment; size = sizeof(c->fc->comment); break;
1471
    case MKTAG(0xa9,'a','l','b'):
1472
        str = c->fc->album; size = sizeof(c->fc->album); break;
1473
    }
1474
    if (!str)
1475
        return 0;
1476
    if (atom.size < 0)
1477
        return -1;
1478

    
1479
    get_buffer(pb, str, FFMIN3(size, str_size, atom.size));
1480
    dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);
1481
    return 0;
1482
}
1483

    
1484
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1485
{
1486
    int i;
1487
    int width;
1488
    int height;
1489
    int64_t disp_transform[2];
1490
    int display_matrix[3][2];
1491
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1492
    MOVStreamContext *sc = st->priv_data;
1493
    int version = get_byte(pb);
1494

    
1495
    get_be24(pb); /* flags */
1496
    /*
1497
    MOV_TRACK_ENABLED 0x0001
1498
    MOV_TRACK_IN_MOVIE 0x0002
1499
    MOV_TRACK_IN_PREVIEW 0x0004
1500
    MOV_TRACK_IN_POSTER 0x0008
1501
    */
1502

    
1503
    if (version == 1) {
1504
        get_be64(pb);
1505
        get_be64(pb);
1506
    } else {
1507
        get_be32(pb); /* creation time */
1508
        get_be32(pb); /* modification time */
1509
    }
1510
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1511
    get_be32(pb); /* reserved */
1512
    st->start_time = 0; /* check */
1513
    /* highlevel (considering edits) duration in movie timebase */
1514
    (version == 1) ? get_be64(pb) : get_be32(pb);
1515
    get_be32(pb); /* reserved */
1516
    get_be32(pb); /* reserved */
1517

    
1518
    get_be16(pb); /* layer */
1519
    get_be16(pb); /* alternate group */
1520
    get_be16(pb); /* volume */
1521
    get_be16(pb); /* reserved */
1522

    
1523
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1524
    // they're kept in fixed point format through all calculations
1525
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1526
    for (i = 0; i < 3; i++) {
1527
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1528
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1529
        get_be32(pb);           // 2.30 fixed point (not used)
1530
    }
1531

    
1532
    width = get_be32(pb);       // 16.16 fixed point track width
1533
    height = get_be32(pb);      // 16.16 fixed point track height
1534
    sc->width = width >> 16;
1535
    sc->height = height >> 16;
1536

    
1537
    //transform the display width/height according to the matrix
1538
    // skip this if the display matrix is the default identity matrix
1539
    // to keep the same scale, use [width height 1<<16]
1540
    if (width && height &&
1541
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1542
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1543
        display_matrix[2][0]           || display_matrix[2][1])) {
1544
        for (i = 0; i < 2; i++)
1545
            disp_transform[i] =
1546
                (int64_t)  width  * display_matrix[0][i] +
1547
                (int64_t)  height * display_matrix[1][i] +
1548
                ((int64_t) display_matrix[2][i] << 16);
1549

    
1550
        //sample aspect ratio is new width/height divided by old width/height
1551
        st->sample_aspect_ratio = av_d2q(
1552
            ((double) disp_transform[0] * height) /
1553
            ((double) disp_transform[1] * width), INT_MAX);
1554
    }
1555
    return 0;
1556
}
1557

    
1558
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1559
{
1560
    MOVFragment *frag = &c->fragment;
1561
    MOVTrackExt *trex = NULL;
1562
    int flags, track_id, i;
1563

    
1564
    get_byte(pb); /* version */
1565
    flags = get_be24(pb);
1566

    
1567
    track_id = get_be32(pb);
1568
    if (!track_id || track_id > c->fc->nb_streams)
1569
        return -1;
1570
    frag->track_id = track_id;
1571
    for (i = 0; i < c->trex_count; i++)
1572
        if (c->trex_data[i].track_id == frag->track_id) {
1573
            trex = &c->trex_data[i];
1574
            break;
1575
        }
1576
    if (!trex) {
1577
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1578
        return -1;
1579
    }
1580

    
1581
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1582
    else              frag->base_data_offset = frag->moof_offset;
1583
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1584
    else              frag->stsd_id          = trex->stsd_id;
1585

    
1586
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1587
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1588
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1589
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1590
    return 0;
1591
}
1592

    
1593
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1594
{
1595
    MOVTrackExt *trex;
1596

    
1597
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1598
        return -1;
1599
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1600
    if (!c->trex_data)
1601
        return AVERROR(ENOMEM);
1602
    trex = &c->trex_data[c->trex_count++];
1603
    get_byte(pb); /* version */
1604
    get_be24(pb); /* flags */
1605
    trex->track_id = get_be32(pb);
1606
    trex->stsd_id  = get_be32(pb);
1607
    trex->duration = get_be32(pb);
1608
    trex->size     = get_be32(pb);
1609
    trex->flags    = get_be32(pb);
1610
    return 0;
1611
}
1612

    
1613
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1614
{
1615
    MOVFragment *frag = &c->fragment;
1616
    AVStream *st;
1617
    MOVStreamContext *sc;
1618
    uint64_t offset;
1619
    int64_t dts;
1620
    int data_offset = 0;
1621
    unsigned entries, first_sample_flags = frag->flags;
1622
    int flags, distance, i;
1623

    
1624
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1625
        return -1;
1626
    st = c->fc->streams[frag->track_id-1];
1627
    sc = st->priv_data;
1628
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1629
        return 0;
1630
    get_byte(pb); /* version */
1631
    flags = get_be24(pb);
1632
    entries = get_be32(pb);
1633
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1634
    if (flags & 0x001) data_offset        = get_be32(pb);
1635
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1636
    if (flags & 0x800) {
1637
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1638
            return -1;
1639
        sc->ctts_data = av_realloc(sc->ctts_data,
1640
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1641
        if (!sc->ctts_data)
1642
            return AVERROR(ENOMEM);
1643
    }
1644
    dts = st->duration;
1645
    offset = frag->base_data_offset + data_offset;
1646
    distance = 0;
1647
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1648
    for (i = 0; i < entries; i++) {
1649
        unsigned sample_size = frag->size;
1650
        int sample_flags = i ? frag->flags : first_sample_flags;
1651
        unsigned sample_duration = frag->duration;
1652
        int keyframe;
1653

    
1654
        if (flags & 0x100) sample_duration = get_be32(pb);
1655
        if (flags & 0x200) sample_size     = get_be32(pb);
1656
        if (flags & 0x400) sample_flags    = get_be32(pb);
1657
        if (flags & 0x800) {
1658
            sc->ctts_data[sc->ctts_count].count = 1;
1659
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1660
            sc->ctts_count++;
1661
        }
1662
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1663
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1664
            distance = 0;
1665
        av_add_index_entry(st, offset, dts, sample_size, distance,
1666
                           keyframe ? AVINDEX_KEYFRAME : 0);
1667
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1668
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1669
                offset, dts, sample_size, distance, keyframe);
1670
        distance++;
1671
        assert(sample_duration % sc->time_rate == 0);
1672
        dts += sample_duration / sc->time_rate;
1673
        offset += sample_size;
1674
    }
1675
    frag->moof_offset = offset;
1676
    sc->sample_count = st->nb_index_entries;
1677
    st->duration = dts;
1678
    return 0;
1679
}
1680

    
1681
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1682
/* like the files created with Adobe Premiere 5.0, for samples see */
1683
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1684
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1685
{
1686
    int err;
1687

    
1688
    if (atom.size < 8)
1689
        return 0; /* continue */
1690
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1691
        url_fskip(pb, atom.size - 4);
1692
        return 0;
1693
    }
1694
    atom.type = get_le32(pb);
1695
    atom.offset += 8;
1696
    atom.size -= 8;
1697
    if (atom.type != MKTAG('m','d','a','t')) {
1698
        url_fskip(pb, atom.size);
1699
        return 0;
1700
    }
1701
    err = mov_read_mdat(c, pb, atom);
1702
    return err;
1703
}
1704

    
1705
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1706
{
1707
#if CONFIG_ZLIB
1708
    ByteIOContext ctx;
1709
    uint8_t *cmov_data;
1710
    uint8_t *moov_data; /* uncompressed data */
1711
    long cmov_len, moov_len;
1712
    int ret = -1;
1713

    
1714
    get_be32(pb); /* dcom atom */
1715
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1716
        return -1;
1717
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1718
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1719
        return -1;
1720
    }
1721
    get_be32(pb); /* cmvd atom */
1722
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1723
        return -1;
1724
    moov_len = get_be32(pb); /* uncompressed size */
1725
    cmov_len = atom.size - 6 * 4;
1726

    
1727
    cmov_data = av_malloc(cmov_len);
1728
    if (!cmov_data)
1729
        return -1;
1730
    moov_data = av_malloc(moov_len);
1731
    if (!moov_data) {
1732
        av_free(cmov_data);
1733
        return -1;
1734
    }
1735
    get_buffer(pb, cmov_data, cmov_len);
1736
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1737
        goto free_and_return;
1738
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1739
        goto free_and_return;
1740
    atom.type = MKTAG('m','o','o','v');
1741
    atom.offset = 0;
1742
    atom.size = moov_len;
1743
#ifdef DEBUG
1744
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1745
#endif
1746
    ret = mov_read_default(c, &ctx, atom);
1747
free_and_return:
1748
    av_free(moov_data);
1749
    av_free(cmov_data);
1750
    return ret;
1751
#else
1752
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1753
    return -1;
1754
#endif
1755
}
1756

    
1757
/* edit list atom */
1758
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1759
{
1760
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1761
    int i, edit_count;
1762

    
1763
    get_byte(pb); /* version */
1764
    get_be24(pb); /* flags */
1765
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1766

    
1767
    for(i=0; i<edit_count; i++){
1768
        int time;
1769
        get_be32(pb); /* Track duration */
1770
        time = get_be32(pb); /* Media time */
1771
        get_be32(pb); /* Media rate */
1772
        if (i == 0 && time != -1)
1773
            sc->time_offset = time;
1774
    }
1775

    
1776
    if(edit_count > 1)
1777
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1778
               "a/v desync might occur, patch welcome\n");
1779

    
1780
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1781
    return 0;
1782
}
1783

    
1784
static const MOVParseTableEntry mov_default_parse_table[] = {
1785
{ MKTAG('a','v','s','s'), mov_read_extradata },
1786
{ MKTAG('c','o','6','4'), mov_read_stco },
1787
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1788
{ MKTAG('d','i','n','f'), mov_read_default },
1789
{ MKTAG('d','r','e','f'), mov_read_dref },
1790
{ MKTAG('e','d','t','s'), mov_read_default },
1791
{ MKTAG('e','l','s','t'), mov_read_elst },
1792
{ MKTAG('e','n','d','a'), mov_read_enda },
1793
{ MKTAG('f','i','e','l'), mov_read_extradata },
1794
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1795
{ MKTAG('g','l','b','l'), mov_read_glbl },
1796
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1797
{ MKTAG('i','l','s','t'), mov_read_ilst },
1798
{ MKTAG('j','p','2','h'), mov_read_extradata },
1799
{ MKTAG('m','d','a','t'), mov_read_mdat },
1800
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1801
{ MKTAG('m','d','i','a'), mov_read_default },
1802
{ MKTAG('m','e','t','a'), mov_read_meta },
1803
{ MKTAG('m','i','n','f'), mov_read_default },
1804
{ MKTAG('m','o','o','f'), mov_read_moof },
1805
{ MKTAG('m','o','o','v'), mov_read_moov },
1806
{ MKTAG('m','v','e','x'), mov_read_default },
1807
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1808
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1809
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1810
{ MKTAG('a','v','c','C'), mov_read_glbl },
1811
{ MKTAG('p','a','s','p'), mov_read_pasp },
1812
{ MKTAG('s','t','b','l'), mov_read_default },
1813
{ MKTAG('s','t','c','o'), mov_read_stco },
1814
{ MKTAG('s','t','s','c'), mov_read_stsc },
1815
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1816
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1817
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1818
{ MKTAG('s','t','t','s'), mov_read_stts },
1819
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1820
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1821
{ MKTAG('t','r','a','k'), mov_read_trak },
1822
{ MKTAG('t','r','a','f'), mov_read_default },
1823
{ MKTAG('t','r','e','x'), mov_read_trex },
1824
{ MKTAG('t','r','k','n'), mov_read_trkn },
1825
{ MKTAG('t','r','u','n'), mov_read_trun },
1826
{ MKTAG('u','d','t','a'), mov_read_default },
1827
{ MKTAG('w','a','v','e'), mov_read_wave },
1828
{ MKTAG('e','s','d','s'), mov_read_esds },
1829
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1830
{ MKTAG('c','m','o','v'), mov_read_cmov },
1831
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1832
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1833
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1834
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1835
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1836
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1837
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1838
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1839
{ 0, NULL }
1840
};
1841

    
1842
static int mov_probe(AVProbeData *p)
1843
{
1844
    unsigned int offset;
1845
    uint32_t tag;
1846
    int score = 0;
1847

    
1848
    /* check file header */
1849
    offset = 0;
1850
    for(;;) {
1851
        /* ignore invalid offset */
1852
        if ((offset + 8) > (unsigned int)p->buf_size)
1853
            return score;
1854
        tag = AV_RL32(p->buf + offset + 4);
1855
        switch(tag) {
1856
        /* check for obvious tags */
1857
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1858
        case MKTAG('m','o','o','v'):
1859
        case MKTAG('m','d','a','t'):
1860
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1861
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1862
        case MKTAG('f','t','y','p'):
1863
            return AVPROBE_SCORE_MAX;
1864
        /* those are more common words, so rate then a bit less */
1865
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1866
        case MKTAG('w','i','d','e'):
1867
        case MKTAG('f','r','e','e'):
1868
        case MKTAG('j','u','n','k'):
1869
        case MKTAG('p','i','c','t'):
1870
            return AVPROBE_SCORE_MAX - 5;
1871
        case MKTAG(0x82,0x82,0x7f,0x7d):
1872
        case MKTAG('s','k','i','p'):
1873
        case MKTAG('u','u','i','d'):
1874
        case MKTAG('p','r','f','l'):
1875
            offset = AV_RB32(p->buf+offset) + offset;
1876
            /* if we only find those cause probedata is too small at least rate them */
1877
            score = AVPROBE_SCORE_MAX - 50;
1878
            break;
1879
        default:
1880
            /* unrecognized tag */
1881
            return score;
1882
        }
1883
    }
1884
    return score;
1885
}
1886

    
1887
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1888
{
1889
    MOVContext *mov = s->priv_data;
1890
    ByteIOContext *pb = s->pb;
1891
    int err;
1892
    MOVAtom atom = { 0, 0, 0 };
1893

    
1894
    mov->fc = s;
1895
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1896
    if(!url_is_streamed(pb))
1897
        atom.size = url_fsize(pb);
1898
    else
1899
        atom.size = INT64_MAX;
1900

    
1901
    /* check MOV header */
1902
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1903
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1904
        return err;
1905
    }
1906
    if (!mov->found_moov) {
1907
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1908
        return -1;
1909
    }
1910
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1911

    
1912
    return 0;
1913
}
1914

    
1915
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1916
{
1917
    MOVContext *mov = s->priv_data;
1918
    MOVStreamContext *sc = 0;
1919
    AVIndexEntry *sample = 0;
1920
    int64_t best_dts = INT64_MAX;
1921
    int i;
1922
 retry:
1923
    for (i = 0; i < s->nb_streams; i++) {
1924
        AVStream *st = s->streams[i];
1925
        MOVStreamContext *msc = st->priv_data;
1926
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1927
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1928
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1929
                                     AV_TIME_BASE, msc->time_scale);
1930
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1931
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1932
                (!url_is_streamed(s->pb) &&
1933
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1934
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1935
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1936
                sample = current_sample;
1937
                best_dts = dts;
1938
                sc = msc;
1939
            }
1940
        }
1941
    }
1942
    if (!sample) {
1943
        mov->found_mdat = 0;
1944
        if (!url_is_streamed(s->pb) ||
1945
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1946
            url_feof(s->pb))
1947
            return -1;
1948
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1949
        goto retry;
1950
    }
1951
    /* must be done just before reading, to avoid infinite loop on sample */
1952
    sc->current_sample++;
1953
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1954
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1955
               sc->ffindex, sample->pos);
1956
        return -1;
1957
    }
1958
    av_get_packet(sc->pb, pkt, sample->size);
1959
#if CONFIG_DV_DEMUXER
1960
    if (mov->dv_demux && sc->dv_audio_container) {
1961
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1962
        av_free(pkt->data);
1963
        pkt->size = 0;
1964
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1965
            return -1;
1966
    }
1967
#endif
1968
    pkt->stream_index = sc->ffindex;
1969
    pkt->dts = sample->timestamp;
1970
    if (sc->ctts_data) {
1971
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1972
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1973
        /* update ctts context */
1974
        sc->sample_to_ctime_sample++;
1975
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1976
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1977
            sc->sample_to_ctime_index++;
1978
            sc->sample_to_ctime_sample = 0;
1979
        }
1980
        if (sc->wrong_dts)
1981
            pkt->dts = AV_NOPTS_VALUE;
1982
    } else {
1983
        AVStream *st = s->streams[sc->ffindex];
1984
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1985
            st->index_entries[sc->current_sample].timestamp : st->duration;
1986
        pkt->duration = next_dts - pkt->dts;
1987
        pkt->pts = pkt->dts;
1988
    }
1989
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1990
    pkt->pos = sample->pos;
1991
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1992
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1993
    return 0;
1994
}
1995

    
1996
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1997
{
1998
    MOVStreamContext *sc = st->priv_data;
1999
    int sample, time_sample;
2000
    int i;
2001

    
2002
    sample = av_index_search_timestamp(st, timestamp, flags);
2003
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2004
    if (sample < 0) /* not sure what to do */
2005
        return -1;
2006
    sc->current_sample = sample;
2007
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
2008
    /* adjust ctts index */
2009
    if (sc->ctts_data) {
2010
        time_sample = 0;
2011
        for (i = 0; i < sc->ctts_count; i++) {
2012
            int next = time_sample + sc->ctts_data[i].count;
2013
            if (next > sc->current_sample) {
2014
                sc->sample_to_ctime_index = i;
2015
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
2016
                break;
2017
            }
2018
            time_sample = next;
2019
        }
2020
    }
2021
    return sample;
2022
}
2023

    
2024
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2025
{
2026
    AVStream *st;
2027
    int64_t seek_timestamp, timestamp;
2028
    int sample;
2029
    int i;
2030

    
2031
    if (stream_index >= s->nb_streams)
2032
        return -1;
2033
    if (sample_time < 0)
2034
        sample_time = 0;
2035

    
2036
    st = s->streams[stream_index];
2037
    sample = mov_seek_stream(st, sample_time, flags);
2038
    if (sample < 0)
2039
        return -1;
2040

    
2041
    /* adjust seek timestamp to found sample timestamp */
2042
    seek_timestamp = st->index_entries[sample].timestamp;
2043

    
2044
    for (i = 0; i < s->nb_streams; i++) {
2045
        st = s->streams[i];
2046
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2047
            continue;
2048

    
2049
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2050
        mov_seek_stream(st, timestamp, flags);
2051
    }
2052
    return 0;
2053
}
2054

    
2055
static int mov_read_close(AVFormatContext *s)
2056
{
2057
    int i, j;
2058
    MOVContext *mov = s->priv_data;
2059
    for(i=0; i<s->nb_streams; i++) {
2060
        MOVStreamContext *sc = s->streams[i]->priv_data;
2061
        av_freep(&sc->ctts_data);
2062
        for (j=0; j<sc->drefs_count; j++)
2063
            av_freep(&sc->drefs[j].path);
2064
        av_freep(&sc->drefs);
2065
        if (sc->pb && sc->pb != s->pb)
2066
            url_fclose(sc->pb);
2067
    }
2068
    if(mov->dv_demux){
2069
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
2070
            av_freep(&mov->dv_fctx->streams[i]->codec);
2071
            av_freep(&mov->dv_fctx->streams[i]);
2072
        }
2073
        av_freep(&mov->dv_fctx);
2074
        av_freep(&mov->dv_demux);
2075
    }
2076
    av_freep(&mov->trex_data);
2077
    return 0;
2078
}
2079

    
2080
AVInputFormat mov_demuxer = {
2081
    "mov,mp4,m4a,3gp,3g2,mj2",
2082
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2083
    sizeof(MOVContext),
2084
    mov_probe,
2085
    mov_read_header,
2086
    mov_read_packet,
2087
    mov_read_close,
2088
    mov_read_seek,
2089
};