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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
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 */
21

    
22
#include <limits.h>
23

    
24
//#define DEBUG
25

    
26
#include "avformat.h"
27
#include "riff.h"
28
#include "isom.h"
29
#include "dv.h"
30
#include "libavcodec/mpeg4audio.h"
31
#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/
47
 * when coding this :) (it's a writer anyway)
48
 *
49
 * Reference documents:
50
 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
51
 * Apple:
52
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
53
 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
54
 * QuickTime is a trademark of Apple (AFAIK :))
55
 */
56

    
57
#include "qtpalette.h"
58

    
59

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

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

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

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

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

    
85
struct MOVParseTableEntry;
86

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

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

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

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

    
153

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

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

    
167
static const MOVParseTableEntry mov_default_parse_table[];
168

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

    
176
    a.offset = atom.offset;
177

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

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

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

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

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

    
230
    return err;
231
}
232

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

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

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

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

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

    
261
            url_fskip(pb, 10);
262

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

    
269
            url_fskip(pb, 112);
270

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    
496
    return 0;
497
}
498

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

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

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

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

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

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

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

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

    
532
    return 0;
533
}
534

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    
647
    entries = get_be32(pb);
648

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

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

    
665
    return 0;
666
}
667

    
668
/**
669
 * Compute codec id for 'lpcm' tag.
670
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
671
 */
672
static int mov_get_lpcm_codec_id(int bps, int flags)
673
{
674
    if (flags & 1) { // floating point
675
        if (flags & 2) { // big endian
676
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
677
          //else if (bps == 64) return CODEC_ID_PCM_F64BE;
678
        } else {
679
          //if      (bps == 32) return CODEC_ID_PCM_F32LE;
680
          //else if (bps == 64) return CODEC_ID_PCM_F64LE;
681
        }
682
    } else {
683
        if (flags & 2) {
684
            if      (bps == 8)
685
                // signed integer
686
                if (flags & 4)  return CODEC_ID_PCM_S8;
687
                else            return CODEC_ID_PCM_U8;
688
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
689
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
690
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
691
        } else {
692
            if      (bps == 8)
693
                if (flags & 4)  return CODEC_ID_PCM_S8;
694
                else            return CODEC_ID_PCM_U8;
695
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
696
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
697
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
698
        }
699
    }
700
    return 0;
701
}
702

    
703
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
704
{
705
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
706
    MOVStreamContext *sc = st->priv_data;
707
    int j, entries, pseudo_stream_id;
708

    
709
    get_byte(pb); /* version */
710
    get_be24(pb); /* flags */
711

    
712
    entries = get_be32(pb);
713

    
714
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
715
        //Parsing Sample description table
716
        enum CodecID id;
717
        int dref_id;
718
        MOV_atom_t a = { 0, 0, 0 };
719
        offset_t start_pos = url_ftell(pb);
720
        int size = get_be32(pb); /* size */
721
        uint32_t format = get_le32(pb); /* data format */
722

    
723
        get_be32(pb); /* reserved */
724
        get_be16(pb); /* reserved */
725
        dref_id = get_be16(pb);
726

    
727
        if (st->codec->codec_tag &&
728
            st->codec->codec_tag != format &&
729
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
730
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
731
           ){
732
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
733
             * export it as a separate AVStream but this needs a few changes
734
             * in the MOV demuxer, patch welcome. */
735
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
736
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
737
            continue;
738
        }
739
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
740
        sc->dref_id= dref_id;
741

    
742
        st->codec->codec_tag = format;
743
        id = codec_get_id(codec_movaudio_tags, format);
744
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
745
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
746

    
747
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
748
            st->codec->codec_type = CODEC_TYPE_AUDIO;
749
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
750
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
751
            id = codec_get_id(codec_movvideo_tags, format);
752
            if (id <= 0)
753
                id = codec_get_id(codec_bmp_tags, format);
754
            if (id > 0)
755
                st->codec->codec_type = CODEC_TYPE_VIDEO;
756
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
757
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
758
                if(id > 0)
759
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
760
            }
761
        }
762

    
763
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
764
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
765
                (format >> 24) & 0xff, st->codec->codec_type);
766

    
767
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
768
            uint8_t codec_name[32];
769
            unsigned int color_depth;
770
            int color_greyscale;
771

    
772
            st->codec->codec_id = id;
773
            get_be16(pb); /* version */
774
            get_be16(pb); /* revision level */
775
            get_be32(pb); /* vendor */
776
            get_be32(pb); /* temporal quality */
777
            get_be32(pb); /* spatial quality */
778

    
779
            st->codec->width = get_be16(pb); /* width */
780
            st->codec->height = get_be16(pb); /* height */
781

    
782
            get_be32(pb); /* horiz resolution */
783
            get_be32(pb); /* vert resolution */
784
            get_be32(pb); /* data size, always 0 */
785
            get_be16(pb); /* frames per samples */
786

    
787
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
788
            if (codec_name[0] <= 31) {
789
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
790
                st->codec->codec_name[codec_name[0]] = 0;
791
            }
792

    
793
            st->codec->bits_per_sample = get_be16(pb); /* depth */
794
            st->codec->color_table_id = get_be16(pb); /* colortable id */
795
            dprintf(c->fc, "depth %d, ctab id %d\n",
796
                   st->codec->bits_per_sample, st->codec->color_table_id);
797
            /* figure out the palette situation */
798
            color_depth = st->codec->bits_per_sample & 0x1F;
799
            color_greyscale = st->codec->bits_per_sample & 0x20;
800

    
801
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
802
            if ((color_depth == 2) || (color_depth == 4) ||
803
                (color_depth == 8)) {
804
                /* for palette traversal */
805
                unsigned int color_start, color_count, color_end;
806
                unsigned char r, g, b;
807

    
808
                if (color_greyscale) {
809
                    int color_index, color_dec;
810
                    /* compute the greyscale palette */
811
                    st->codec->bits_per_sample = color_depth;
812
                    color_count = 1 << color_depth;
813
                    color_index = 255;
814
                    color_dec = 256 / (color_count - 1);
815
                    for (j = 0; j < color_count; j++) {
816
                        r = g = b = color_index;
817
                        c->palette_control.palette[j] =
818
                            (r << 16) | (g << 8) | (b);
819
                        color_index -= color_dec;
820
                        if (color_index < 0)
821
                            color_index = 0;
822
                    }
823
                } else if (st->codec->color_table_id) {
824
                    const uint8_t *color_table;
825
                    /* if flag bit 3 is set, use the default palette */
826
                    color_count = 1 << color_depth;
827
                    if (color_depth == 2)
828
                        color_table = ff_qt_default_palette_4;
829
                    else if (color_depth == 4)
830
                        color_table = ff_qt_default_palette_16;
831
                    else
832
                        color_table = ff_qt_default_palette_256;
833

    
834
                    for (j = 0; j < color_count; j++) {
835
                        r = color_table[j * 4 + 0];
836
                        g = color_table[j * 4 + 1];
837
                        b = color_table[j * 4 + 2];
838
                        c->palette_control.palette[j] =
839
                            (r << 16) | (g << 8) | (b);
840
                    }
841
                } else {
842
                    /* load the palette from the file */
843
                    color_start = get_be32(pb);
844
                    color_count = get_be16(pb);
845
                    color_end = get_be16(pb);
846
                    if ((color_start <= 255) &&
847
                        (color_end <= 255)) {
848
                        for (j = color_start; j <= color_end; j++) {
849
                            /* each R, G, or B component is 16 bits;
850
                             * only use the top 8 bits; skip alpha bytes
851
                             * up front */
852
                            get_byte(pb);
853
                            get_byte(pb);
854
                            r = get_byte(pb);
855
                            get_byte(pb);
856
                            g = get_byte(pb);
857
                            get_byte(pb);
858
                            b = get_byte(pb);
859
                            get_byte(pb);
860
                            c->palette_control.palette[j] =
861
                                (r << 16) | (g << 8) | (b);
862
                        }
863
                    }
864
                }
865
                st->codec->palctrl = &c->palette_control;
866
                st->codec->palctrl->palette_changed = 1;
867
            } else
868
                st->codec->palctrl = NULL;
869
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
870
            int bits_per_sample, flags;
871
            uint16_t version = get_be16(pb);
872

    
873
            st->codec->codec_id = id;
874
            get_be16(pb); /* revision level */
875
            get_be32(pb); /* vendor */
876

    
877
            st->codec->channels = get_be16(pb);             /* channel count */
878
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
879
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
880

    
881
            sc->audio_cid = get_be16(pb);
882
            get_be16(pb); /* packet size = 0 */
883

    
884
            st->codec->sample_rate = ((get_be32(pb) >> 16));
885

    
886
            //Read QT version 1 fields. In version 0 these do not exist.
887
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
888
            if(!c->isom) {
889
                if(version==1) {
890
                    sc->samples_per_frame = get_be32(pb);
891
                    get_be32(pb); /* bytes per packet */
892
                    sc->bytes_per_frame = get_be32(pb);
893
                    get_be32(pb); /* bytes per sample */
894
                } else if(version==2) {
895
                    get_be32(pb); /* sizeof struct only */
896
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
897
                    st->codec->channels = get_be32(pb);
898
                    get_be32(pb); /* always 0x7F000000 */
899
                    st->codec->bits_per_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
900
                    flags = get_be32(pb); /* lcpm format specific flag */
901
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
902
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
903
                    if (format == MKTAG('l','p','c','m'))
904
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_sample, flags);
905
                }
906
            }
907

    
908
            switch (st->codec->codec_id) {
909
            case CODEC_ID_PCM_S8:
910
            case CODEC_ID_PCM_U8:
911
                if (st->codec->bits_per_sample == 16)
912
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
913
                break;
914
            case CODEC_ID_PCM_S16LE:
915
            case CODEC_ID_PCM_S16BE:
916
                if (st->codec->bits_per_sample == 8)
917
                    st->codec->codec_id = CODEC_ID_PCM_S8;
918
                else if (st->codec->bits_per_sample == 24)
919
                    st->codec->codec_id =
920
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
921
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
922
                break;
923
            /* set values for old format before stsd version 1 appeared */
924
            case CODEC_ID_MACE3:
925
                sc->samples_per_frame = 6;
926
                sc->bytes_per_frame = 2*st->codec->channels;
927
                break;
928
            case CODEC_ID_MACE6:
929
                sc->samples_per_frame = 6;
930
                sc->bytes_per_frame = 1*st->codec->channels;
931
                break;
932
            case CODEC_ID_ADPCM_IMA_QT:
933
                sc->samples_per_frame = 64;
934
                sc->bytes_per_frame = 34*st->codec->channels;
935
                break;
936
            case CODEC_ID_GSM:
937
                sc->samples_per_frame = 160;
938
                sc->bytes_per_frame = 33;
939
                break;
940
            default:
941
                break;
942
            }
943

    
944
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
945
            if (bits_per_sample) {
946
                st->codec->bits_per_sample = bits_per_sample;
947
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
948
            }
949
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
950
            st->codec->codec_id= id;
951
        } else {
952
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
953
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
954
        }
955
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
956
        a.size = size - (url_ftell(pb) - start_pos);
957
        if (a.size > 8) {
958
            if (mov_read_default(c, pb, a) < 0)
959
                return -1;
960
        } else if (a.size > 0)
961
            url_fskip(pb, a.size);
962
    }
963

    
964
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
965
        st->codec->sample_rate= sc->time_scale;
966

    
967
    /* special codec parameters handling */
968
    switch (st->codec->codec_id) {
969
#ifdef CONFIG_DV_DEMUXER
970
    case CODEC_ID_DVAUDIO:
971
        c->dv_fctx = av_alloc_format_context();
972
        c->dv_demux = dv_init_demux(c->dv_fctx);
973
        if (!c->dv_demux) {
974
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
975
            return -1;
976
        }
977
        sc->dv_audio_container = 1;
978
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
979
        break;
980
#endif
981
    /* no ifdef since parameters are always those */
982
    case CODEC_ID_AMR_WB:
983
        st->codec->sample_rate= 16000;
984
        st->codec->channels= 1; /* really needed */
985
        break;
986
    case CODEC_ID_QCELP:
987
    case CODEC_ID_AMR_NB:
988
        st->codec->frame_size= sc->samples_per_frame;
989
        st->codec->sample_rate= 8000;
990
        st->codec->channels= 1; /* really needed */
991
        break;
992
    case CODEC_ID_MP2:
993
    case CODEC_ID_MP3:
994
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
995
        st->need_parsing = AVSTREAM_PARSE_FULL;
996
        break;
997
    case CODEC_ID_GSM:
998
    case CODEC_ID_ADPCM_MS:
999
    case CODEC_ID_ADPCM_IMA_WAV:
1000
        st->codec->block_align = sc->bytes_per_frame;
1001
        break;
1002
    case CODEC_ID_ALAC:
1003
        if (st->codec->extradata_size == 36)
1004
            st->codec->frame_size = AV_RB32((st->codec->extradata+12));
1005
        break;
1006
    default:
1007
        break;
1008
    }
1009

    
1010
    return 0;
1011
}
1012

    
1013
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1014
{
1015
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1016
    MOVStreamContext *sc = st->priv_data;
1017
    unsigned int i, entries;
1018

    
1019
    get_byte(pb); /* version */
1020
    get_be24(pb); /* flags */
1021

    
1022
    entries = get_be32(pb);
1023

    
1024
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
1025
        return -1;
1026

    
1027
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1028

    
1029
    sc->sample_to_chunk_sz = entries;
1030
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
1031
    if (!sc->sample_to_chunk)
1032
        return -1;
1033
    for(i=0; i<entries; i++) {
1034
        sc->sample_to_chunk[i].first = get_be32(pb);
1035
        sc->sample_to_chunk[i].count = get_be32(pb);
1036
        sc->sample_to_chunk[i].id = get_be32(pb);
1037
    }
1038
    return 0;
1039
}
1040

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

    
1047
    get_byte(pb); /* version */
1048
    get_be24(pb); /* flags */
1049

    
1050
    entries = get_be32(pb);
1051

    
1052
    if(entries >= UINT_MAX / sizeof(int))
1053
        return -1;
1054

    
1055
    sc->keyframe_count = entries;
1056

    
1057
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1058

    
1059
    sc->keyframes = av_malloc(entries * sizeof(int));
1060
    if (!sc->keyframes)
1061
        return -1;
1062
    for(i=0; i<entries; i++) {
1063
        sc->keyframes[i] = get_be32(pb);
1064
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1065
    }
1066
    return 0;
1067
}
1068

    
1069
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1070
{
1071
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1072
    MOVStreamContext *sc = st->priv_data;
1073
    unsigned int i, entries, sample_size;
1074

    
1075
    get_byte(pb); /* version */
1076
    get_be24(pb); /* flags */
1077

    
1078
    sample_size = get_be32(pb);
1079
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1080
        sc->sample_size = sample_size;
1081
    entries = get_be32(pb);
1082
    if(entries >= UINT_MAX / sizeof(int))
1083
        return -1;
1084

    
1085
    sc->sample_count = entries;
1086
    if (sample_size)
1087
        return 0;
1088

    
1089
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1090

    
1091
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1092
    if (!sc->sample_sizes)
1093
        return -1;
1094
    for(i=0; i<entries; i++)
1095
        sc->sample_sizes[i] = get_be32(pb);
1096
    return 0;
1097
}
1098

    
1099
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1100
{
1101
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1102
    MOVStreamContext *sc = st->priv_data;
1103
    unsigned int i, entries;
1104
    int64_t duration=0;
1105
    int64_t total_sample_count=0;
1106

    
1107
    get_byte(pb); /* version */
1108
    get_be24(pb); /* flags */
1109
    entries = get_be32(pb);
1110
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1111
        return -1;
1112

    
1113
    sc->stts_count = entries;
1114
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1115
    if (!sc->stts_data)
1116
        return -1;
1117
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1118

    
1119
    sc->time_rate=0;
1120

    
1121
    for(i=0; i<entries; i++) {
1122
        int sample_duration;
1123
        int sample_count;
1124

    
1125
        sample_count=get_be32(pb);
1126
        sample_duration = get_be32(pb);
1127
        sc->stts_data[i].count= sample_count;
1128
        sc->stts_data[i].duration= sample_duration;
1129

    
1130
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1131

    
1132
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1133

    
1134
        duration+=(int64_t)sample_duration*sample_count;
1135
        total_sample_count+=sample_count;
1136
    }
1137

    
1138
    st->nb_frames= total_sample_count;
1139
    if(duration)
1140
        st->duration= duration;
1141
    return 0;
1142
}
1143

    
1144
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1145
{
1146
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1147
    MOVStreamContext *sc = st->priv_data;
1148
    unsigned int i, entries;
1149

    
1150
    get_byte(pb); /* version */
1151
    get_be24(pb); /* flags */
1152
    entries = get_be32(pb);
1153
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1154
        return -1;
1155

    
1156
    sc->ctts_count = entries;
1157
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1158
    if (!sc->ctts_data)
1159
        return -1;
1160
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1161

    
1162
    for(i=0; i<entries; i++) {
1163
        int count    =get_be32(pb);
1164
        int duration =get_be32(pb);
1165

    
1166
        if (duration < 0) {
1167
            av_log(c->fc, AV_LOG_WARNING, "negative ctts, ignoring\n");
1168
            sc->ctts_count = 0;
1169
            url_fskip(pb, 8 * (entries - i - 1));
1170
            break;
1171
        }
1172
        sc->ctts_data[i].count   = count;
1173
        sc->ctts_data[i].duration= duration;
1174

    
1175
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1176
    }
1177
    return 0;
1178
}
1179

    
1180
static void mov_build_index(MOVContext *mov, AVStream *st)
1181
{
1182
    MOVStreamContext *sc = st->priv_data;
1183
    offset_t current_offset;
1184
    int64_t current_dts = 0;
1185
    unsigned int stts_index = 0;
1186
    unsigned int stsc_index = 0;
1187
    unsigned int stss_index = 0;
1188
    unsigned int i, j;
1189

    
1190
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1191
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1192
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1193
        unsigned int current_sample = 0;
1194
        unsigned int stts_sample = 0;
1195
        unsigned int keyframe, sample_size;
1196
        unsigned int distance = 0;
1197
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1198

    
1199
        st->nb_frames = sc->sample_count;
1200
        for (i = 0; i < sc->chunk_count; i++) {
1201
            current_offset = sc->chunk_offsets[i];
1202
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1203
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1204
                stsc_index++;
1205
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1206
                if (current_sample >= sc->sample_count) {
1207
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1208
                    goto out;
1209
                }
1210
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1211
                if (keyframe) {
1212
                    distance = 0;
1213
                    if (stss_index + 1 < sc->keyframe_count)
1214
                        stss_index++;
1215
                }
1216
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1217
                if(sc->pseudo_stream_id == -1 ||
1218
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1219
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1220
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1221
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1222
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1223
                            current_offset, current_dts, sample_size, distance, keyframe);
1224
                }
1225
                current_offset += sample_size;
1226
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1227
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1228
                distance++;
1229
                stts_sample++;
1230
                current_sample++;
1231
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1232
                    stts_sample = 0;
1233
                    stts_index++;
1234
                }
1235
            }
1236
        }
1237
    } else { /* read whole chunk */
1238
        unsigned int chunk_samples, chunk_size, chunk_duration;
1239
        unsigned int frames = 1;
1240
        for (i = 0; i < sc->chunk_count; i++) {
1241
            current_offset = sc->chunk_offsets[i];
1242
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1243
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1244
                stsc_index++;
1245
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1246
            /* get chunk size, beware of alaw/ulaw/mace */
1247
            if (sc->samples_per_frame > 0 &&
1248
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1249
                if (sc->samples_per_frame < 160)
1250
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1251
                else {
1252
                    chunk_size = sc->bytes_per_frame;
1253
                    frames = chunk_samples / sc->samples_per_frame;
1254
                    chunk_samples = sc->samples_per_frame;
1255
                }
1256
            } else
1257
                chunk_size = chunk_samples * sc->sample_size;
1258
            for (j = 0; j < frames; j++) {
1259
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1260
                /* get chunk duration */
1261
                chunk_duration = 0;
1262
                while (chunk_samples > 0) {
1263
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1264
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1265
                        sc->stts_data[stts_index].count -= chunk_samples;
1266
                        break;
1267
                    } else {
1268
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1269
                        chunk_samples -= sc->stts_data[stts_index].count;
1270
                        if (stts_index + 1 < sc->stts_count)
1271
                            stts_index++;
1272
                    }
1273
                }
1274
                current_offset += sc->bytes_per_frame;
1275
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1276
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1277
                        chunk_size, chunk_duration);
1278
                assert(chunk_duration % sc->time_rate == 0);
1279
                current_dts += chunk_duration / sc->time_rate;
1280
            }
1281
        }
1282
    }
1283
 out:
1284
    /* adjust sample count to avindex entries */
1285
    sc->sample_count = st->nb_index_entries;
1286
}
1287

    
1288
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1289
{
1290
    AVStream *st;
1291
    MOVStreamContext *sc;
1292
    int ret;
1293

    
1294
    st = av_new_stream(c->fc, c->fc->nb_streams);
1295
    if (!st) return AVERROR(ENOMEM);
1296
    sc = av_mallocz(sizeof(MOVStreamContext));
1297
    if (!sc) return AVERROR(ENOMEM);
1298

    
1299
    st->priv_data = sc;
1300
    st->codec->codec_type = CODEC_TYPE_DATA;
1301
    st->start_time = 0; /* XXX: check */
1302

    
1303
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1304
        return ret;
1305

    
1306
    /* sanity checks */
1307
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1308
                           (!sc->sample_size && !sc->sample_count))){
1309
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1310
               st->index);
1311
        sc->sample_count = 0; //ignore track
1312
        return 0;
1313
    }
1314
    if(!sc->time_rate)
1315
        sc->time_rate=1;
1316
    if(!sc->time_scale)
1317
        sc->time_scale= c->time_scale;
1318
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1319

    
1320
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1321
        !st->codec->frame_size && sc->stts_count == 1)
1322
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1323

    
1324
    if(st->duration != AV_NOPTS_VALUE){
1325
        assert(st->duration % sc->time_rate == 0);
1326
        st->duration /= sc->time_rate;
1327
    }
1328
    sc->ffindex = st->index;
1329
    mov_build_index(c, st);
1330

    
1331
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1332
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1333
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1334
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1335
    } else
1336
        sc->pb = c->fc->pb;
1337

    
1338
    switch (st->codec->codec_id) {
1339
#ifdef CONFIG_H261_DECODER
1340
    case CODEC_ID_H261:
1341
#endif
1342
#ifdef CONFIG_H263_DECODER
1343
    case CODEC_ID_H263:
1344
#endif
1345
#ifdef CONFIG_MPEG4_DECODER
1346
    case CODEC_ID_MPEG4:
1347
#endif
1348
        st->codec->width= 0; /* let decoder init width/height */
1349
        st->codec->height= 0;
1350
        break;
1351
#ifdef CONFIG_VORBIS_DECODER
1352
    case CODEC_ID_VORBIS:
1353
#endif
1354
        st->codec->sample_rate= 0; /* let decoder init parameters properly */
1355
        break;
1356
    }
1357

    
1358
    /* Do not need those anymore. */
1359
    av_freep(&sc->chunk_offsets);
1360
    av_freep(&sc->sample_to_chunk);
1361
    av_freep(&sc->sample_sizes);
1362
    av_freep(&sc->keyframes);
1363
    av_freep(&sc->stts_data);
1364

    
1365
    return 0;
1366
}
1367

    
1368
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1369
{
1370
    uint16_t str_size = get_be16(pb); /* string length */;
1371

    
1372
    get_be16(pb); /* skip language */
1373
    get_buffer(pb, str, FFMIN(size, str_size));
1374
}
1375

    
1376
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1377
{
1378
    uint64_t end = url_ftell(pb) + atom.size;
1379

    
1380
    while (url_ftell(pb) + 8 < end) {
1381
        uint32_t tag_size = get_be32(pb);
1382
        uint32_t tag      = get_le32(pb);
1383
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1384

    
1385
        if (next > end) // stop if tag_size is wrong
1386
            break;
1387

    
1388
        switch (tag) {
1389
        case MKTAG(0xa9,'n','a','m'):
1390
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1391
            break;
1392
        case MKTAG(0xa9,'w','r','t'):
1393
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1394
            break;
1395
        case MKTAG(0xa9,'c','p','y'):
1396
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1397
            break;
1398
        case MKTAG(0xa9,'i','n','f'):
1399
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1400
            break;
1401
        default:
1402
            break;
1403
        }
1404

    
1405
        url_fseek(pb, next, SEEK_SET);
1406
    }
1407

    
1408
    return 0;
1409
}
1410

    
1411
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1412
{
1413
    int i;
1414
    int width;
1415
    int height;
1416
    int64_t disp_transform[2];
1417
    int display_matrix[3][2];
1418
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1419
    int version = get_byte(pb);
1420

    
1421
    get_be24(pb); /* flags */
1422
    /*
1423
    MOV_TRACK_ENABLED 0x0001
1424
    MOV_TRACK_IN_MOVIE 0x0002
1425
    MOV_TRACK_IN_PREVIEW 0x0004
1426
    MOV_TRACK_IN_POSTER 0x0008
1427
    */
1428

    
1429
    if (version == 1) {
1430
        get_be64(pb);
1431
        get_be64(pb);
1432
    } else {
1433
        get_be32(pb); /* creation time */
1434
        get_be32(pb); /* modification time */
1435
    }
1436
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1437
    get_be32(pb); /* reserved */
1438
    st->start_time = 0; /* check */
1439
    /* highlevel (considering edits) duration in movie timebase */
1440
    (version == 1) ? get_be64(pb) : get_be32(pb);
1441
    get_be32(pb); /* reserved */
1442
    get_be32(pb); /* reserved */
1443

    
1444
    get_be16(pb); /* layer */
1445
    get_be16(pb); /* alternate group */
1446
    get_be16(pb); /* volume */
1447
    get_be16(pb); /* reserved */
1448

    
1449
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1450
    // they're kept in fixed point format through all calculations
1451
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1452
    for (i = 0; i < 3; i++) {
1453
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1454
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1455
        get_be32(pb);           // 2.30 fixed point (not used)
1456
    }
1457

    
1458
    width = get_be32(pb);       // 16.16 fixed point track width
1459
    height = get_be32(pb);      // 16.16 fixed point track height
1460

    
1461
    //transform the display width/height according to the matrix
1462
    // skip this if the display matrix is the default identity matrix
1463
    // to keep the same scale, use [width height 1<<16]
1464
    if (width && height &&
1465
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1466
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1467
        display_matrix[2][0]           || display_matrix[2][1])) {
1468
        for (i = 0; i < 2; i++)
1469
            disp_transform[i] =
1470
                (int64_t)  width  * display_matrix[0][i] +
1471
                (int64_t)  height * display_matrix[1][i] +
1472
                ((int64_t) display_matrix[2][i] << 16);
1473

    
1474
        //sample aspect ratio is new width/height divided by old width/height
1475
        st->codec->sample_aspect_ratio = av_d2q(
1476
            ((double) disp_transform[0] * height) /
1477
            ((double) disp_transform[1] * width), INT_MAX);
1478
    }
1479
    return 0;
1480
}
1481

    
1482
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1483
{
1484
    MOVFragment *frag = &c->fragment;
1485
    MOVTrackExt *trex = NULL;
1486
    int flags, track_id, i;
1487

    
1488
    get_byte(pb); /* version */
1489
    flags = get_be24(pb);
1490

    
1491
    track_id = get_be32(pb);
1492
    if (!track_id || track_id > c->fc->nb_streams)
1493
        return -1;
1494
    frag->track_id = track_id;
1495
    for (i = 0; i < c->trex_count; i++)
1496
        if (c->trex_data[i].track_id == frag->track_id) {
1497
            trex = &c->trex_data[i];
1498
            break;
1499
        }
1500
    if (!trex) {
1501
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1502
        return -1;
1503
    }
1504

    
1505
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1506
    else              frag->base_data_offset = frag->moof_offset;
1507
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1508
    else              frag->stsd_id          = trex->stsd_id;
1509

    
1510
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1511
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1512
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1513
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1514
    return 0;
1515
}
1516

    
1517
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1518
{
1519
    MOVTrackExt *trex;
1520

    
1521
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1522
        return -1;
1523
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1524
    if (!c->trex_data)
1525
        return AVERROR(ENOMEM);
1526
    trex = &c->trex_data[c->trex_count++];
1527
    get_byte(pb); /* version */
1528
    get_be24(pb); /* flags */
1529
    trex->track_id = get_be32(pb);
1530
    trex->stsd_id  = get_be32(pb);
1531
    trex->duration = get_be32(pb);
1532
    trex->size     = get_be32(pb);
1533
    trex->flags    = get_be32(pb);
1534
    return 0;
1535
}
1536

    
1537
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1538
{
1539
    MOVFragment *frag = &c->fragment;
1540
    AVStream *st;
1541
    MOVStreamContext *sc;
1542
    uint64_t offset;
1543
    int64_t dts;
1544
    int data_offset = 0;
1545
    unsigned entries, first_sample_flags = frag->flags;
1546
    int flags, distance, i;
1547

    
1548
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1549
        return -1;
1550
    st = c->fc->streams[frag->track_id-1];
1551
    sc = st->priv_data;
1552
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1553
        return 0;
1554
    get_byte(pb); /* version */
1555
    flags = get_be24(pb);
1556
    entries = get_be32(pb);
1557
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1558
    if (flags & 0x001) data_offset        = get_be32(pb);
1559
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1560
    if (flags & 0x800) {
1561
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1562
            return -1;
1563
        sc->ctts_data = av_realloc(sc->ctts_data,
1564
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1565
        if (!sc->ctts_data)
1566
            return AVERROR(ENOMEM);
1567
    }
1568
    dts = st->duration;
1569
    offset = frag->base_data_offset + data_offset;
1570
    distance = 0;
1571
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1572
    for (i = 0; i < entries; i++) {
1573
        unsigned sample_size = frag->size;
1574
        int sample_flags = i ? frag->flags : first_sample_flags;
1575
        unsigned sample_duration = frag->duration;
1576
        int keyframe;
1577

    
1578
        if (flags & 0x100) sample_duration = get_be32(pb);
1579
        if (flags & 0x200) sample_size     = get_be32(pb);
1580
        if (flags & 0x400) sample_flags    = get_be32(pb);
1581
        if (flags & 0x800) {
1582
            sc->ctts_data[sc->ctts_count].count = 1;
1583
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1584
            sc->ctts_count++;
1585
        }
1586
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1587
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1588
            distance = 0;
1589
        av_add_index_entry(st, offset, dts, sample_size, distance,
1590
                           keyframe ? AVINDEX_KEYFRAME : 0);
1591
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1592
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1593
                offset, dts, sample_size, distance, keyframe);
1594
        distance++;
1595
        assert(sample_duration % sc->time_rate == 0);
1596
        dts += sample_duration / sc->time_rate;
1597
        offset += sample_size;
1598
    }
1599
    frag->moof_offset = offset;
1600
    sc->sample_count = st->nb_index_entries;
1601
    st->duration = dts;
1602
    return 0;
1603
}
1604

    
1605
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1606
/* like the files created with Adobe Premiere 5.0, for samples see */
1607
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1608
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1609
{
1610
    int err;
1611

    
1612
    if (atom.size < 8)
1613
        return 0; /* continue */
1614
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1615
        url_fskip(pb, atom.size - 4);
1616
        return 0;
1617
    }
1618
    atom.type = get_le32(pb);
1619
    atom.offset += 8;
1620
    atom.size -= 8;
1621
    if (atom.type != MKTAG('m','d','a','t')) {
1622
        url_fskip(pb, atom.size);
1623
        return 0;
1624
    }
1625
    err = mov_read_mdat(c, pb, atom);
1626
    return err;
1627
}
1628

    
1629
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1630
{
1631
#ifdef CONFIG_ZLIB
1632
    ByteIOContext ctx;
1633
    uint8_t *cmov_data;
1634
    uint8_t *moov_data; /* uncompressed data */
1635
    long cmov_len, moov_len;
1636
    int ret = -1;
1637

    
1638
    get_be32(pb); /* dcom atom */
1639
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1640
        return -1;
1641
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1642
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1643
        return -1;
1644
    }
1645
    get_be32(pb); /* cmvd atom */
1646
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1647
        return -1;
1648
    moov_len = get_be32(pb); /* uncompressed size */
1649
    cmov_len = atom.size - 6 * 4;
1650

    
1651
    cmov_data = av_malloc(cmov_len);
1652
    if (!cmov_data)
1653
        return -1;
1654
    moov_data = av_malloc(moov_len);
1655
    if (!moov_data) {
1656
        av_free(cmov_data);
1657
        return -1;
1658
    }
1659
    get_buffer(pb, cmov_data, cmov_len);
1660
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1661
        goto free_and_return;
1662
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1663
        goto free_and_return;
1664
    atom.type = MKTAG('m','o','o','v');
1665
    atom.offset = 0;
1666
    atom.size = moov_len;
1667
#ifdef DEBUG
1668
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1669
#endif
1670
    ret = mov_read_default(c, &ctx, atom);
1671
free_and_return:
1672
    av_free(moov_data);
1673
    av_free(cmov_data);
1674
    return ret;
1675
#else
1676
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1677
    return -1;
1678
#endif
1679
}
1680

    
1681
/* edit list atom */
1682
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1683
{
1684
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1685
    int i, edit_count;
1686

    
1687
    get_byte(pb); /* version */
1688
    get_be24(pb); /* flags */
1689
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1690

    
1691
    for(i=0; i<edit_count; i++){
1692
        int time;
1693
        get_be32(pb); /* Track duration */
1694
        time = get_be32(pb); /* Media time */
1695
        get_be32(pb); /* Media rate */
1696
        if (time != 0)
1697
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1698
                   "a/v desync might occur, patch welcome\n");
1699
    }
1700
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1701
    return 0;
1702
}
1703

    
1704
static const MOVParseTableEntry mov_default_parse_table[] = {
1705
{ MKTAG('a','v','s','s'), mov_read_extradata },
1706
{ MKTAG('c','o','6','4'), mov_read_stco },
1707
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1708
{ MKTAG('d','i','n','f'), mov_read_default },
1709
{ MKTAG('d','r','e','f'), mov_read_dref },
1710
{ MKTAG('e','d','t','s'), mov_read_default },
1711
{ MKTAG('e','l','s','t'), mov_read_elst },
1712
{ MKTAG('e','n','d','a'), mov_read_enda },
1713
{ MKTAG('f','i','e','l'), mov_read_extradata },
1714
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1715
{ MKTAG('g','l','b','l'), mov_read_glbl },
1716
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1717
{ MKTAG('j','p','2','h'), mov_read_extradata },
1718
{ MKTAG('m','d','a','t'), mov_read_mdat },
1719
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1720
{ MKTAG('m','d','i','a'), mov_read_default },
1721
{ MKTAG('m','i','n','f'), mov_read_default },
1722
{ MKTAG('m','o','o','f'), mov_read_moof },
1723
{ MKTAG('m','o','o','v'), mov_read_moov },
1724
{ MKTAG('m','v','e','x'), mov_read_default },
1725
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1726
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1727
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1728
{ MKTAG('a','v','c','C'), mov_read_glbl },
1729
{ MKTAG('s','t','b','l'), mov_read_default },
1730
{ MKTAG('s','t','c','o'), mov_read_stco },
1731
{ MKTAG('s','t','s','c'), mov_read_stsc },
1732
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1733
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1734
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1735
{ MKTAG('s','t','t','s'), mov_read_stts },
1736
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1737
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1738
{ MKTAG('t','r','a','k'), mov_read_trak },
1739
{ MKTAG('t','r','a','f'), mov_read_default },
1740
{ MKTAG('t','r','e','x'), mov_read_trex },
1741
{ MKTAG('t','r','u','n'), mov_read_trun },
1742
{ MKTAG('u','d','t','a'), mov_read_udta },
1743
{ MKTAG('w','a','v','e'), mov_read_wave },
1744
{ MKTAG('e','s','d','s'), mov_read_esds },
1745
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1746
{ MKTAG('c','m','o','v'), mov_read_cmov },
1747
{ 0, NULL }
1748
};
1749

    
1750
static int mov_probe(AVProbeData *p)
1751
{
1752
    unsigned int offset;
1753
    uint32_t tag;
1754
    int score = 0;
1755

    
1756
    /* check file header */
1757
    offset = 0;
1758
    for(;;) {
1759
        /* ignore invalid offset */
1760
        if ((offset + 8) > (unsigned int)p->buf_size)
1761
            return score;
1762
        tag = AV_RL32(p->buf + offset + 4);
1763
        switch(tag) {
1764
        /* check for obvious tags */
1765
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1766
        case MKTAG('m','o','o','v'):
1767
        case MKTAG('m','d','a','t'):
1768
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1769
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1770
        case MKTAG('f','t','y','p'):
1771
            return AVPROBE_SCORE_MAX;
1772
        /* those are more common words, so rate then a bit less */
1773
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1774
        case MKTAG('w','i','d','e'):
1775
        case MKTAG('f','r','e','e'):
1776
        case MKTAG('j','u','n','k'):
1777
        case MKTAG('p','i','c','t'):
1778
            return AVPROBE_SCORE_MAX - 5;
1779
        case MKTAG(0x82,0x82,0x7f,0x7d):
1780
        case MKTAG('s','k','i','p'):
1781
        case MKTAG('u','u','i','d'):
1782
        case MKTAG('p','r','f','l'):
1783
            offset = AV_RB32(p->buf+offset) + offset;
1784
            /* if we only find those cause probedata is too small at least rate them */
1785
            score = AVPROBE_SCORE_MAX - 50;
1786
            break;
1787
        default:
1788
            /* unrecognized tag */
1789
            return score;
1790
        }
1791
    }
1792
    return score;
1793
}
1794

    
1795
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1796
{
1797
    MOVContext *mov = s->priv_data;
1798
    ByteIOContext *pb = s->pb;
1799
    int err;
1800
    MOV_atom_t atom = { 0, 0, 0 };
1801

    
1802
    mov->fc = s;
1803
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1804
    if(!url_is_streamed(pb))
1805
        atom.size = url_fsize(pb);
1806
    else
1807
        atom.size = INT64_MAX;
1808

    
1809
    /* check MOV header */
1810
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1811
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1812
        return err;
1813
    }
1814
    if (!mov->found_moov) {
1815
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1816
        return -1;
1817
    }
1818
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1819

    
1820
    return 0;
1821
}
1822

    
1823
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1824
{
1825
    MOVContext *mov = s->priv_data;
1826
    MOVStreamContext *sc = 0;
1827
    AVIndexEntry *sample = 0;
1828
    int64_t best_dts = INT64_MAX;
1829
    int i;
1830
 retry:
1831
    for (i = 0; i < s->nb_streams; i++) {
1832
        AVStream *st = s->streams[i];
1833
        MOVStreamContext *msc = st->priv_data;
1834
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1835
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1836
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1837
                                     AV_TIME_BASE, msc->time_scale);
1838
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1839
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1840
                (!url_is_streamed(s->pb) &&
1841
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1842
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1843
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1844
                sample = current_sample;
1845
                best_dts = dts;
1846
                sc = msc;
1847
            }
1848
        }
1849
    }
1850
    if (!sample) {
1851
        mov->found_mdat = 0;
1852
        if (!url_is_streamed(s->pb) ||
1853
            mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1854
            url_feof(s->pb))
1855
            return -1;
1856
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1857
        goto retry;
1858
    }
1859
    /* must be done just before reading, to avoid infinite loop on sample */
1860
    sc->current_sample++;
1861
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1862
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1863
               sc->ffindex, sample->pos);
1864
        return -1;
1865
    }
1866
    av_get_packet(sc->pb, pkt, sample->size);
1867
#ifdef CONFIG_DV_DEMUXER
1868
    if (mov->dv_demux && sc->dv_audio_container) {
1869
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1870
        av_free(pkt->data);
1871
        pkt->size = 0;
1872
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1873
            return -1;
1874
    }
1875
#endif
1876
    pkt->stream_index = sc->ffindex;
1877
    pkt->dts = sample->timestamp;
1878
    if (sc->ctts_data) {
1879
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1880
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1881
        /* update ctts context */
1882
        sc->sample_to_ctime_sample++;
1883
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1884
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1885
            sc->sample_to_ctime_index++;
1886
            sc->sample_to_ctime_sample = 0;
1887
        }
1888
    } else {
1889
        AVStream *st = s->streams[sc->ffindex];
1890
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1891
            st->index_entries[sc->current_sample].timestamp : st->duration;
1892
        pkt->duration = next_dts - pkt->dts;
1893
        pkt->pts = pkt->dts;
1894
    }
1895
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1896
    pkt->pos = sample->pos;
1897
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1898
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1899
    return 0;
1900
}
1901

    
1902
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1903
{
1904
    MOVStreamContext *sc = st->priv_data;
1905
    int sample, time_sample;
1906
    int i;
1907

    
1908
    sample = av_index_search_timestamp(st, timestamp, flags);
1909
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1910
    if (sample < 0) /* not sure what to do */
1911
        return -1;
1912
    sc->current_sample = sample;
1913
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1914
    /* adjust ctts index */
1915
    if (sc->ctts_data) {
1916
        time_sample = 0;
1917
        for (i = 0; i < sc->ctts_count; i++) {
1918
            int next = time_sample + sc->ctts_data[i].count;
1919
            if (next > sc->current_sample) {
1920
                sc->sample_to_ctime_index = i;
1921
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1922
                break;
1923
            }
1924
            time_sample = next;
1925
        }
1926
    }
1927
    return sample;
1928
}
1929

    
1930
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1931
{
1932
    AVStream *st;
1933
    int64_t seek_timestamp, timestamp;
1934
    int sample;
1935
    int i;
1936

    
1937
    if (stream_index >= s->nb_streams)
1938
        return -1;
1939

    
1940
    st = s->streams[stream_index];
1941
    sample = mov_seek_stream(st, sample_time, flags);
1942
    if (sample < 0)
1943
        return -1;
1944

    
1945
    /* adjust seek timestamp to found sample timestamp */
1946
    seek_timestamp = st->index_entries[sample].timestamp;
1947

    
1948
    for (i = 0; i < s->nb_streams; i++) {
1949
        st = s->streams[i];
1950
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1951
            continue;
1952

    
1953
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1954
        mov_seek_stream(st, timestamp, flags);
1955
    }
1956
    return 0;
1957
}
1958

    
1959
static int mov_read_close(AVFormatContext *s)
1960
{
1961
    int i, j;
1962
    MOVContext *mov = s->priv_data;
1963
    for(i=0; i<s->nb_streams; i++) {
1964
        MOVStreamContext *sc = s->streams[i]->priv_data;
1965
        av_freep(&sc->ctts_data);
1966
        for (j=0; j<sc->drefs_count; j++)
1967
            av_freep(&sc->drefs[j].path);
1968
        av_freep(&sc->drefs);
1969
        if (sc->pb && sc->pb != s->pb)
1970
            url_fclose(sc->pb);
1971
    }
1972
    if(mov->dv_demux){
1973
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1974
            av_freep(&mov->dv_fctx->streams[i]->codec);
1975
            av_freep(&mov->dv_fctx->streams[i]);
1976
        }
1977
        av_freep(&mov->dv_fctx);
1978
        av_freep(&mov->dv_demux);
1979
    }
1980
    av_freep(&mov->trex_data);
1981
    return 0;
1982
}
1983

    
1984
AVInputFormat mov_demuxer = {
1985
    "mov,mp4,m4a,3gp,3g2,mj2",
1986
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
1987
    sizeof(MOVContext),
1988
    mov_probe,
1989
    mov_read_header,
1990
    mov_read_packet,
1991
    mov_read_close,
1992
    mov_read_seek,
1993
};