Statistics
| Branch: | Revision:

ffmpeg / libavformat / mov.c @ 0c5f76f7

History | View | Annotate | Download (68.7 KB)

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
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#include <limits.h>
23

    
24
//#define DEBUG
25

    
26
#include "avformat.h"
27
#include "riff.h"
28
#include "isom.h"
29
#include "dv.h"
30
#include "libavcodec/mpeg4audio.h"
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
    int wrong_dts; ///< dts are wrong due to negative ctts
137
} MOVStreamContext;
138

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

    
154

    
155
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
156

    
157
/* those functions parse an atom */
158
/* return code:
159
  0: continue to parse next atom
160
 <0: error occurred, exit
161
*/
162
/* links atom IDs to parse functions */
163
typedef struct MOVParseTableEntry {
164
    uint32_t type;
165
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
166
} MOVParseTableEntry;
167

    
168
static const MOVParseTableEntry mov_default_parse_table[];
169

    
170
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
171
{
172
    int64_t total_size = 0;
173
    MOV_atom_t a;
174
    int i;
175
    int err = 0;
176

    
177
    a.offset = atom.offset;
178

    
179
    if (atom.size < 0)
180
        atom.size = INT64_MAX;
181
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
182
        a.size = atom.size;
183
        a.type=0;
184
        if(atom.size >= 8) {
185
            a.size = get_be32(pb);
186
            a.type = get_le32(pb);
187
        }
188
        total_size += 8;
189
        a.offset += 8;
190
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
191
                a.type, (char*)&a.type, a.size, atom.size, total_size);
192
        if (a.size == 1) { /* 64 bit extended size */
193
            a.size = get_be64(pb) - 8;
194
            a.offset += 8;
195
            total_size += 8;
196
        }
197
        if (a.size == 0) {
198
            a.size = atom.size - total_size;
199
            if (a.size <= 8)
200
                break;
201
        }
202
        a.size -= 8;
203
        if(a.size < 0)
204
            break;
205
        a.size = FFMIN(a.size, atom.size - total_size);
206

    
207
        for (i = 0; mov_default_parse_table[i].type != 0
208
             && mov_default_parse_table[i].type != a.type; i++)
209
            /* empty */;
210

    
211
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
212
            url_fskip(pb, a.size);
213
        } else {
214
            offset_t start_pos = url_ftell(pb);
215
            int64_t left;
216
            err = mov_default_parse_table[i].parse(c, pb, a);
217
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
218
                break;
219
            left = a.size - url_ftell(pb) + start_pos;
220
            if (left > 0) /* skip garbage at atom end */
221
                url_fskip(pb, left);
222
        }
223

    
224
        a.offset += a.size;
225
        total_size += a.size;
226
    }
227

    
228
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
229
        url_fskip(pb, atom.size - total_size);
230

    
231
    return err;
232
}
233

    
234
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
235
{
236
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
237
    MOVStreamContext *sc = st->priv_data;
238
    int entries, i, j;
239

    
240
    get_be32(pb); // version + flags
241
    entries = get_be32(pb);
242
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
243
        return -1;
244
    sc->drefs_count = entries;
245
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
246

    
247
    for (i = 0; i < sc->drefs_count; i++) {
248
        MOV_dref_t *dref = &sc->drefs[i];
249
        uint32_t size = get_be32(pb);
250
        offset_t next = url_ftell(pb) + size - 4;
251

    
252
        dref->type = get_le32(pb);
253
        get_be32(pb); // version + flags
254
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
255

    
256
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
257
            /* macintosh alias record */
258
            uint16_t volume_len, len;
259
            char volume[28];
260
            int16_t type;
261

    
262
            url_fskip(pb, 10);
263

    
264
            volume_len = get_byte(pb);
265
            volume_len = FFMIN(volume_len, 27);
266
            get_buffer(pb, volume, 27);
267
            volume[volume_len] = 0;
268
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
269

    
270
            url_fskip(pb, 112);
271

    
272
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
273
                type = get_be16(pb);
274
                len = get_be16(pb);
275
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
276
                if (len&1)
277
                    len += 1;
278
                if (type == 2) { // absolute path
279
                    av_free(dref->path);
280
                    dref->path = av_mallocz(len+1);
281
                    if (!dref->path)
282
                        return AVERROR(ENOMEM);
283
                    get_buffer(pb, dref->path, len);
284
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
285
                        len -= volume_len;
286
                        memmove(dref->path, dref->path+volume_len, len);
287
                        dref->path[len] = 0;
288
                    }
289
                    for (j = 0; j < len; j++)
290
                        if (dref->path[j] == ':')
291
                            dref->path[j] = '/';
292
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
293
                } else
294
                    url_fskip(pb, len);
295
            }
296
        }
297
        url_fseek(pb, next, SEEK_SET);
298
    }
299
    return 0;
300
}
301

    
302
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
303
{
304
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
305
    uint32_t type;
306
    uint32_t ctype;
307

    
308
    get_byte(pb); /* version */
309
    get_be24(pb); /* flags */
310

    
311
    /* component type */
312
    ctype = get_le32(pb);
313
    type = get_le32(pb); /* component subtype */
314

    
315
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
316
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
317
    dprintf(c->fc, "stype= %c%c%c%c\n",
318
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
319
    if(!ctype)
320
        c->isom = 1;
321
    if     (type == MKTAG('v','i','d','e'))
322
        st->codec->codec_type = CODEC_TYPE_VIDEO;
323
    else if(type == MKTAG('s','o','u','n'))
324
        st->codec->codec_type = CODEC_TYPE_AUDIO;
325
    else if(type == MKTAG('m','1','a',' '))
326
        st->codec->codec_id = CODEC_ID_MP2;
327
    else if(type == MKTAG('s','u','b','p')) {
328
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
329
    }
330
    get_be32(pb); /* component  manufacture */
331
    get_be32(pb); /* component flags */
332
    get_be32(pb); /* component flags mask */
333

    
334
    if(atom.size <= 24)
335
        return 0; /* nothing left to read */
336

    
337
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
338
    return 0;
339
}
340

    
341
static int mp4_read_descr_len(ByteIOContext *pb)
342
{
343
    int len = 0;
344
    int count = 4;
345
    while (count--) {
346
        int c = get_byte(pb);
347
        len = (len << 7) | (c & 0x7f);
348
        if (!(c & 0x80))
349
            break;
350
    }
351
    return len;
352
}
353

    
354
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
355
{
356
    int len;
357
    *tag = get_byte(pb);
358
    len = mp4_read_descr_len(pb);
359
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
360
    return len;
361
}
362

    
363
#define MP4ESDescrTag                   0x03
364
#define MP4DecConfigDescrTag            0x04
365
#define MP4DecSpecificDescrTag          0x05
366

    
367
static const AVCodecTag mp4_audio_types[] = {
368
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
369
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
370
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
371
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
372
    { CODEC_ID_NONE,    0 },
373
};
374

    
375
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
376
{
377
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
378
    int tag, len;
379

    
380
    get_be32(pb); /* version + flags */
381
    len = mp4_read_descr(c, pb, &tag);
382
    if (tag == MP4ESDescrTag) {
383
        get_be16(pb); /* ID */
384
        get_byte(pb); /* priority */
385
    } else
386
        get_be16(pb); /* ID */
387

    
388
    len = mp4_read_descr(c, pb, &tag);
389
    if (tag == MP4DecConfigDescrTag) {
390
        int object_type_id = get_byte(pb);
391
        get_byte(pb); /* stream type */
392
        get_be24(pb); /* buffer size db */
393
        get_be32(pb); /* max bitrate */
394
        get_be32(pb); /* avg bitrate */
395

    
396
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
397
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
398
        len = mp4_read_descr(c, pb, &tag);
399
        if (tag == MP4DecSpecificDescrTag) {
400
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
401
            if((uint64_t)len > (1<<30))
402
                return -1;
403
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
404
            if (!st->codec->extradata)
405
                return AVERROR(ENOMEM);
406
            get_buffer(pb, st->codec->extradata, len);
407
            st->codec->extradata_size = len;
408
            if (st->codec->codec_id == CODEC_ID_AAC) {
409
                MPEG4AudioConfig cfg;
410
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
411
                                         st->codec->extradata_size);
412
                if (cfg.chan_config > 7)
413
                    return -1;
414
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
415
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
416
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
417
                else
418
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
419
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
420
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
421
                        cfg.object_type, cfg.ext_object_type,
422
                        cfg.sample_rate, cfg.ext_sample_rate);
423
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
424
                                                         cfg.object_type)))
425
                    st->codec->codec_id = CODEC_ID_AAC;
426
            }
427
        }
428
    }
429
    return 0;
430
}
431

    
432
/* this atom contains actual media data */
433
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
434
{
435
    if(atom.size == 0) /* wrong one (MP4) */
436
        return 0;
437
    c->found_mdat=1;
438
    return 0; /* now go for moov */
439
}
440

    
441
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
442
{
443
    uint32_t type = get_le32(pb);
444

    
445
    if (type != MKTAG('q','t',' ',' '))
446
        c->isom = 1;
447
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
448
    get_be32(pb); /* minor version */
449
    url_fskip(pb, atom.size - 8);
450
    return 0;
451
}
452

    
453
/* this atom should contain all header atoms */
454
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
455
{
456
    if (mov_read_default(c, pb, atom) < 0)
457
        return -1;
458
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
459
    /* so we don't parse the whole file if over a network */
460
    c->found_moov=1;
461
    return 0; /* now go for mdat */
462
}
463

    
464
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
465
{
466
    c->fragment.moof_offset = url_ftell(pb) - 8;
467
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
468
    return mov_read_default(c, pb, atom);
469
}
470

    
471
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
472
{
473
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
474
    MOVStreamContext *sc = st->priv_data;
475
    int version = get_byte(pb);
476
    int lang;
477

    
478
    if (version > 1)
479
        return -1; /* unsupported */
480

    
481
    get_be24(pb); /* flags */
482
    if (version == 1) {
483
        get_be64(pb);
484
        get_be64(pb);
485
    } else {
486
        get_be32(pb); /* creation time */
487
        get_be32(pb); /* modification time */
488
    }
489

    
490
    sc->time_scale = get_be32(pb);
491
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
492

    
493
    lang = get_be16(pb); /* language */
494
    ff_mov_lang_to_iso639(lang, st->language);
495
    get_be16(pb); /* quality */
496

    
497
    return 0;
498
}
499

    
500
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
501
{
502
    int version = get_byte(pb); /* version */
503
    get_be24(pb); /* flags */
504

    
505
    if (version == 1) {
506
        get_be64(pb);
507
        get_be64(pb);
508
    } else {
509
        get_be32(pb); /* creation time */
510
        get_be32(pb); /* modification time */
511
    }
512
    c->time_scale = get_be32(pb); /* time scale */
513

    
514
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
515

    
516
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
517
    get_be32(pb); /* preferred scale */
518

    
519
    get_be16(pb); /* preferred volume */
520

    
521
    url_fskip(pb, 10); /* reserved */
522

    
523
    url_fskip(pb, 36); /* display matrix */
524

    
525
    get_be32(pb); /* preview time */
526
    get_be32(pb); /* preview duration */
527
    get_be32(pb); /* poster time */
528
    get_be32(pb); /* selection time */
529
    get_be32(pb); /* selection duration */
530
    get_be32(pb); /* current time */
531
    get_be32(pb); /* next track ID */
532

    
533
    return 0;
534
}
535

    
536
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
537
{
538
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
539

    
540
    if((uint64_t)atom.size > (1<<30))
541
        return -1;
542

    
543
    // currently SVQ3 decoder expect full STSD header - so let's fake it
544
    // this should be fixed and just SMI header should be passed
545
    av_free(st->codec->extradata);
546
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
547
    if (!st->codec->extradata)
548
        return AVERROR(ENOMEM);
549
    st->codec->extradata_size = 0x5a + atom.size;
550
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
551
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
552
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
553
    return 0;
554
}
555

    
556
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
557
{
558
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
559
    int little_endian = get_be16(pb);
560

    
561
    if (little_endian) {
562
        switch (st->codec->codec_id) {
563
        case CODEC_ID_PCM_S24BE:
564
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
565
            break;
566
        case CODEC_ID_PCM_S32BE:
567
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
568
            break;
569
        case CODEC_ID_PCM_F32BE:
570
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
571
            break;
572
        case CODEC_ID_PCM_F64BE:
573
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
574
            break;
575
        default:
576
            break;
577
        }
578
    }
579
    return 0;
580
}
581

    
582
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
583
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
584
{
585
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
586
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
587
    uint8_t *buf;
588
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
589
        return -1;
590
    buf= av_realloc(st->codec->extradata, size);
591
    if(!buf)
592
        return -1;
593
    st->codec->extradata= buf;
594
    buf+= st->codec->extradata_size;
595
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
596
    AV_WB32(       buf    , atom.size + 8);
597
    AV_WL32(       buf + 4, atom.type);
598
    get_buffer(pb, buf + 8, atom.size);
599
    return 0;
600
}
601

    
602
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
603
{
604
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
605

    
606
    if((uint64_t)atom.size > (1<<30))
607
        return -1;
608

    
609
    if (st->codec->codec_id == CODEC_ID_QDM2) {
610
        // pass all frma atom to codec, needed at least for QDM2
611
        av_free(st->codec->extradata);
612
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
613
        if (!st->codec->extradata)
614
            return AVERROR(ENOMEM);
615
        st->codec->extradata_size = atom.size;
616
        get_buffer(pb, st->codec->extradata, atom.size);
617
    } else if (atom.size > 8) { /* to read frma, esds atoms */
618
        if (mov_read_default(c, pb, atom) < 0)
619
            return -1;
620
    } else
621
        url_fskip(pb, atom.size);
622
    return 0;
623
}
624

    
625
/**
626
 * This function reads atom content and puts data in extradata without tag
627
 * nor size unlike mov_read_extradata.
628
 */
629
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
630
{
631
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
632

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

    
636
    av_free(st->codec->extradata);
637
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
638
    if (!st->codec->extradata)
639
        return AVERROR(ENOMEM);
640
    st->codec->extradata_size = atom.size;
641
    get_buffer(pb, st->codec->extradata, atom.size);
642
    return 0;
643
}
644

    
645
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
646
{
647
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
648
    MOVStreamContext *sc = st->priv_data;
649
    unsigned int i, entries;
650

    
651
    get_byte(pb); /* version */
652
    get_be24(pb); /* flags */
653

    
654
    entries = get_be32(pb);
655

    
656
    if(entries >= UINT_MAX/sizeof(int64_t))
657
        return -1;
658

    
659
    sc->chunk_count = entries;
660
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
661
    if (!sc->chunk_offsets)
662
        return -1;
663
    if      (atom.type == MKTAG('s','t','c','o'))
664
        for(i=0; i<entries; i++)
665
            sc->chunk_offsets[i] = get_be32(pb);
666
    else if (atom.type == MKTAG('c','o','6','4'))
667
        for(i=0; i<entries; i++)
668
            sc->chunk_offsets[i] = get_be64(pb);
669
    else
670
        return -1;
671

    
672
    return 0;
673
}
674

    
675
/**
676
 * Compute codec id for 'lpcm' tag.
677
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
678
 */
679
static int mov_get_lpcm_codec_id(int bps, int flags)
680
{
681
    if (flags & 1) { // floating point
682
        if (flags & 2) { // big endian
683
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
684
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
685
        } else {
686
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
687
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
688
        }
689
    } else {
690
        if (flags & 2) {
691
            if      (bps == 8)
692
                // signed integer
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_S16BE;
696
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
697
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
698
        } else {
699
            if      (bps == 8)
700
                if (flags & 4)  return CODEC_ID_PCM_S8;
701
                else            return CODEC_ID_PCM_U8;
702
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
703
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
704
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
705
        }
706
    }
707
    return 0;
708
}
709

    
710
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
711
{
712
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
713
    MOVStreamContext *sc = st->priv_data;
714
    int j, entries, pseudo_stream_id;
715

    
716
    get_byte(pb); /* version */
717
    get_be24(pb); /* flags */
718

    
719
    entries = get_be32(pb);
720

    
721
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
722
        //Parsing Sample description table
723
        enum CodecID id;
724
        int dref_id;
725
        MOV_atom_t a = { 0, 0, 0 };
726
        offset_t start_pos = url_ftell(pb);
727
        int size = get_be32(pb); /* size */
728
        uint32_t format = get_le32(pb); /* data format */
729

    
730
        get_be32(pb); /* reserved */
731
        get_be16(pb); /* reserved */
732
        dref_id = get_be16(pb);
733

    
734
        if (st->codec->codec_tag &&
735
            st->codec->codec_tag != format &&
736
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
737
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
738
           ){
739
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
740
             * export it as a separate AVStream but this needs a few changes
741
             * in the MOV demuxer, patch welcome. */
742
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
743
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
744
            continue;
745
        }
746
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
747
        sc->dref_id= dref_id;
748

    
749
        st->codec->codec_tag = format;
750
        id = codec_get_id(codec_movaudio_tags, format);
751
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
752
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
753

    
754
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
755
            st->codec->codec_type = CODEC_TYPE_AUDIO;
756
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
757
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
758
            id = codec_get_id(codec_movvideo_tags, format);
759
            if (id <= 0)
760
                id = codec_get_id(codec_bmp_tags, format);
761
            if (id > 0)
762
                st->codec->codec_type = CODEC_TYPE_VIDEO;
763
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
764
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
765
                if(id > 0)
766
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
767
            }
768
        }
769

    
770
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
771
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
772
                (format >> 24) & 0xff, st->codec->codec_type);
773

    
774
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
775
            uint8_t codec_name[32];
776
            unsigned int color_depth;
777
            int color_greyscale;
778

    
779
            st->codec->codec_id = id;
780
            get_be16(pb); /* version */
781
            get_be16(pb); /* revision level */
782
            get_be32(pb); /* vendor */
783
            get_be32(pb); /* temporal quality */
784
            get_be32(pb); /* spatial quality */
785

    
786
            st->codec->width = get_be16(pb); /* width */
787
            st->codec->height = get_be16(pb); /* height */
788

    
789
            get_be32(pb); /* horiz resolution */
790
            get_be32(pb); /* vert resolution */
791
            get_be32(pb); /* data size, always 0 */
792
            get_be16(pb); /* frames per samples */
793

    
794
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
795
            if (codec_name[0] <= 31) {
796
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
797
                st->codec->codec_name[codec_name[0]] = 0;
798
            }
799

    
800
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
801
            st->codec->color_table_id = get_be16(pb); /* colortable id */
802
            dprintf(c->fc, "depth %d, ctab id %d\n",
803
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
804
            /* figure out the palette situation */
805
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
806
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
807

    
808
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
809
            if ((color_depth == 2) || (color_depth == 4) ||
810
                (color_depth == 8)) {
811
                /* for palette traversal */
812
                unsigned int color_start, color_count, color_end;
813
                unsigned char r, g, b;
814

    
815
                if (color_greyscale) {
816
                    int color_index, color_dec;
817
                    /* compute the greyscale palette */
818
                    st->codec->bits_per_coded_sample = color_depth;
819
                    color_count = 1 << color_depth;
820
                    color_index = 255;
821
                    color_dec = 256 / (color_count - 1);
822
                    for (j = 0; j < color_count; j++) {
823
                        r = g = b = color_index;
824
                        c->palette_control.palette[j] =
825
                            (r << 16) | (g << 8) | (b);
826
                        color_index -= color_dec;
827
                        if (color_index < 0)
828
                            color_index = 0;
829
                    }
830
                } else if (st->codec->color_table_id) {
831
                    const uint8_t *color_table;
832
                    /* if flag bit 3 is set, use the default palette */
833
                    color_count = 1 << color_depth;
834
                    if (color_depth == 2)
835
                        color_table = ff_qt_default_palette_4;
836
                    else if (color_depth == 4)
837
                        color_table = ff_qt_default_palette_16;
838
                    else
839
                        color_table = ff_qt_default_palette_256;
840

    
841
                    for (j = 0; j < color_count; j++) {
842
                        r = color_table[j * 4 + 0];
843
                        g = color_table[j * 4 + 1];
844
                        b = color_table[j * 4 + 2];
845
                        c->palette_control.palette[j] =
846
                            (r << 16) | (g << 8) | (b);
847
                    }
848
                } else {
849
                    /* load the palette from the file */
850
                    color_start = get_be32(pb);
851
                    color_count = get_be16(pb);
852
                    color_end = get_be16(pb);
853
                    if ((color_start <= 255) &&
854
                        (color_end <= 255)) {
855
                        for (j = color_start; j <= color_end; j++) {
856
                            /* each R, G, or B component is 16 bits;
857
                             * only use the top 8 bits; skip alpha bytes
858
                             * up front */
859
                            get_byte(pb);
860
                            get_byte(pb);
861
                            r = get_byte(pb);
862
                            get_byte(pb);
863
                            g = get_byte(pb);
864
                            get_byte(pb);
865
                            b = get_byte(pb);
866
                            get_byte(pb);
867
                            c->palette_control.palette[j] =
868
                                (r << 16) | (g << 8) | (b);
869
                        }
870
                    }
871
                }
872
                st->codec->palctrl = &c->palette_control;
873
                st->codec->palctrl->palette_changed = 1;
874
            } else
875
                st->codec->palctrl = NULL;
876
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
877
            int bits_per_sample, flags;
878
            uint16_t version = get_be16(pb);
879

    
880
            st->codec->codec_id = id;
881
            get_be16(pb); /* revision level */
882
            get_be32(pb); /* vendor */
883

    
884
            st->codec->channels = get_be16(pb);             /* channel count */
885
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
886
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
887

    
888
            sc->audio_cid = get_be16(pb);
889
            get_be16(pb); /* packet size = 0 */
890

    
891
            st->codec->sample_rate = ((get_be32(pb) >> 16));
892

    
893
            //Read QT version 1 fields. In version 0 these do not exist.
894
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
895
            if(!c->isom) {
896
                if(version==1) {
897
                    sc->samples_per_frame = get_be32(pb);
898
                    get_be32(pb); /* bytes per packet */
899
                    sc->bytes_per_frame = get_be32(pb);
900
                    get_be32(pb); /* bytes per sample */
901
                } else if(version==2) {
902
                    get_be32(pb); /* sizeof struct only */
903
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
904
                    st->codec->channels = get_be32(pb);
905
                    get_be32(pb); /* always 0x7F000000 */
906
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
907
                    flags = get_be32(pb); /* lcpm format specific flag */
908
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
909
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
910
                    if (format == MKTAG('l','p','c','m'))
911
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
912
                }
913
            }
914

    
915
            switch (st->codec->codec_id) {
916
            case CODEC_ID_PCM_S8:
917
            case CODEC_ID_PCM_U8:
918
                if (st->codec->bits_per_coded_sample == 16)
919
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
920
                break;
921
            case CODEC_ID_PCM_S16LE:
922
            case CODEC_ID_PCM_S16BE:
923
                if (st->codec->bits_per_coded_sample == 8)
924
                    st->codec->codec_id = CODEC_ID_PCM_S8;
925
                else if (st->codec->bits_per_coded_sample == 24)
926
                    st->codec->codec_id =
927
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
928
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
929
                break;
930
            /* set values for old format before stsd version 1 appeared */
931
            case CODEC_ID_MACE3:
932
                sc->samples_per_frame = 6;
933
                sc->bytes_per_frame = 2*st->codec->channels;
934
                break;
935
            case CODEC_ID_MACE6:
936
                sc->samples_per_frame = 6;
937
                sc->bytes_per_frame = 1*st->codec->channels;
938
                break;
939
            case CODEC_ID_ADPCM_IMA_QT:
940
                sc->samples_per_frame = 64;
941
                sc->bytes_per_frame = 34*st->codec->channels;
942
                break;
943
            case CODEC_ID_GSM:
944
                sc->samples_per_frame = 160;
945
                sc->bytes_per_frame = 33;
946
                break;
947
            default:
948
                break;
949
            }
950

    
951
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
952
            if (bits_per_sample) {
953
                st->codec->bits_per_coded_sample = bits_per_sample;
954
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
955
            }
956
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
957
            st->codec->codec_id= id;
958
        } else {
959
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
960
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
961
        }
962
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
963
        a.size = size - (url_ftell(pb) - start_pos);
964
        if (a.size > 8) {
965
            if (mov_read_default(c, pb, a) < 0)
966
                return -1;
967
        } else if (a.size > 0)
968
            url_fskip(pb, a.size);
969
    }
970

    
971
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
972
        st->codec->sample_rate= sc->time_scale;
973

    
974
    /* special codec parameters handling */
975
    switch (st->codec->codec_id) {
976
#ifdef CONFIG_DV_DEMUXER
977
    case CODEC_ID_DVAUDIO:
978
        c->dv_fctx = av_alloc_format_context();
979
        c->dv_demux = dv_init_demux(c->dv_fctx);
980
        if (!c->dv_demux) {
981
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
982
            return -1;
983
        }
984
        sc->dv_audio_container = 1;
985
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
986
        break;
987
#endif
988
    /* no ifdef since parameters are always those */
989
    case CODEC_ID_QCELP:
990
    case CODEC_ID_AMR_NB:
991
    case CODEC_ID_AMR_WB:
992
        st->codec->frame_size= sc->samples_per_frame;
993
        st->codec->channels= 1; /* really needed */
994
        break;
995
    case CODEC_ID_MP2:
996
    case CODEC_ID_MP3:
997
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
998
        st->need_parsing = AVSTREAM_PARSE_FULL;
999
        break;
1000
    case CODEC_ID_GSM:
1001
    case CODEC_ID_ADPCM_MS:
1002
    case CODEC_ID_ADPCM_IMA_WAV:
1003
        st->codec->block_align = sc->bytes_per_frame;
1004
        break;
1005
    case CODEC_ID_ALAC:
1006
        if (st->codec->extradata_size == 36)
1007
            st->codec->frame_size = AV_RB32((st->codec->extradata+12));
1008
        break;
1009
    default:
1010
        break;
1011
    }
1012

    
1013
    return 0;
1014
}
1015

    
1016
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1017
{
1018
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1019
    MOVStreamContext *sc = st->priv_data;
1020
    unsigned int i, entries;
1021

    
1022
    get_byte(pb); /* version */
1023
    get_be24(pb); /* flags */
1024

    
1025
    entries = get_be32(pb);
1026

    
1027
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
1028
        return -1;
1029

    
1030
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1031

    
1032
    sc->sample_to_chunk_sz = entries;
1033
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
1034
    if (!sc->sample_to_chunk)
1035
        return -1;
1036
    for(i=0; i<entries; i++) {
1037
        sc->sample_to_chunk[i].first = get_be32(pb);
1038
        sc->sample_to_chunk[i].count = get_be32(pb);
1039
        sc->sample_to_chunk[i].id = get_be32(pb);
1040
    }
1041
    return 0;
1042
}
1043

    
1044
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1045
{
1046
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1047
    MOVStreamContext *sc = st->priv_data;
1048
    unsigned int i, entries;
1049

    
1050
    get_byte(pb); /* version */
1051
    get_be24(pb); /* flags */
1052

    
1053
    entries = get_be32(pb);
1054

    
1055
    if(entries >= UINT_MAX / sizeof(int))
1056
        return -1;
1057

    
1058
    sc->keyframe_count = entries;
1059

    
1060
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
1061

    
1062
    sc->keyframes = av_malloc(entries * sizeof(int));
1063
    if (!sc->keyframes)
1064
        return -1;
1065
    for(i=0; i<entries; i++) {
1066
        sc->keyframes[i] = get_be32(pb);
1067
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1068
    }
1069
    return 0;
1070
}
1071

    
1072
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1073
{
1074
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1075
    MOVStreamContext *sc = st->priv_data;
1076
    unsigned int i, entries, sample_size;
1077

    
1078
    get_byte(pb); /* version */
1079
    get_be24(pb); /* flags */
1080

    
1081
    sample_size = get_be32(pb);
1082
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1083
        sc->sample_size = sample_size;
1084
    entries = get_be32(pb);
1085
    if(entries >= UINT_MAX / sizeof(int))
1086
        return -1;
1087

    
1088
    sc->sample_count = entries;
1089
    if (sample_size)
1090
        return 0;
1091

    
1092
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1093

    
1094
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1095
    if (!sc->sample_sizes)
1096
        return -1;
1097
    for(i=0; i<entries; i++)
1098
        sc->sample_sizes[i] = get_be32(pb);
1099
    return 0;
1100
}
1101

    
1102
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1103
{
1104
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1105
    MOVStreamContext *sc = st->priv_data;
1106
    unsigned int i, entries;
1107
    int64_t duration=0;
1108
    int64_t total_sample_count=0;
1109

    
1110
    get_byte(pb); /* version */
1111
    get_be24(pb); /* flags */
1112
    entries = get_be32(pb);
1113
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1114
        return -1;
1115

    
1116
    sc->stts_count = entries;
1117
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1118
    if (!sc->stts_data)
1119
        return -1;
1120
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1121

    
1122
    sc->time_rate=0;
1123

    
1124
    for(i=0; i<entries; i++) {
1125
        int sample_duration;
1126
        int sample_count;
1127

    
1128
        sample_count=get_be32(pb);
1129
        sample_duration = get_be32(pb);
1130
        sc->stts_data[i].count= sample_count;
1131
        sc->stts_data[i].duration= sample_duration;
1132

    
1133
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1134

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

    
1137
        duration+=(int64_t)sample_duration*sample_count;
1138
        total_sample_count+=sample_count;
1139
    }
1140

    
1141
    st->nb_frames= total_sample_count;
1142
    if(duration)
1143
        st->duration= duration;
1144
    return 0;
1145
}
1146

    
1147
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1148
{
1149
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1150
    MOVStreamContext *sc = st->priv_data;
1151
    unsigned int i, entries;
1152

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

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

    
1165
    for(i=0; i<entries; i++) {
1166
        int count    =get_be32(pb);
1167
        int duration =get_be32(pb);
1168

    
1169
        if (duration < 0) {
1170
            sc->wrong_dts = 1;
1171
            st->codec->has_b_frames = 1;
1172
        }
1173
        sc->ctts_data[i].count   = count;
1174
        sc->ctts_data[i].duration= duration;
1175

    
1176
        sc->time_rate= ff_gcd(sc->time_rate, FFABS(duration));
1177
    }
1178
    return 0;
1179
}
1180

    
1181
static void mov_build_index(MOVContext *mov, AVStream *st)
1182
{
1183
    MOVStreamContext *sc = st->priv_data;
1184
    offset_t current_offset;
1185
    int64_t current_dts = 0;
1186
    unsigned int stts_index = 0;
1187
    unsigned int stsc_index = 0;
1188
    unsigned int stss_index = 0;
1189
    unsigned int i, j;
1190

    
1191
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1192
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1193
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1194
        unsigned int current_sample = 0;
1195
        unsigned int stts_sample = 0;
1196
        unsigned int keyframe, sample_size;
1197
        unsigned int distance = 0;
1198
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1199

    
1200
        st->nb_frames = sc->sample_count;
1201
        for (i = 0; i < sc->chunk_count; i++) {
1202
            current_offset = sc->chunk_offsets[i];
1203
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1204
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1205
                stsc_index++;
1206
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1207
                if (current_sample >= sc->sample_count) {
1208
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1209
                    goto out;
1210
                }
1211
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1212
                if (keyframe) {
1213
                    distance = 0;
1214
                    if (stss_index + 1 < sc->keyframe_count)
1215
                        stss_index++;
1216
                }
1217
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1218
                if(sc->pseudo_stream_id == -1 ||
1219
                   sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
1220
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1221
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1222
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1223
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1224
                            current_offset, current_dts, sample_size, distance, keyframe);
1225
                }
1226
                current_offset += sample_size;
1227
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1228
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1229
                distance++;
1230
                stts_sample++;
1231
                current_sample++;
1232
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1233
                    stts_sample = 0;
1234
                    stts_index++;
1235
                }
1236
            }
1237
        }
1238
    } else { /* read whole chunk */
1239
        unsigned int chunk_samples, chunk_size, chunk_duration;
1240
        unsigned int frames = 1;
1241
        for (i = 0; i < sc->chunk_count; i++) {
1242
            current_offset = sc->chunk_offsets[i];
1243
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1244
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1245
                stsc_index++;
1246
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1247
            /* get chunk size, beware of alaw/ulaw/mace */
1248
            if (sc->samples_per_frame > 0 &&
1249
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1250
                if (sc->samples_per_frame < 160)
1251
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1252
                else {
1253
                    chunk_size = sc->bytes_per_frame;
1254
                    frames = chunk_samples / sc->samples_per_frame;
1255
                    chunk_samples = sc->samples_per_frame;
1256
                }
1257
            } else
1258
                chunk_size = chunk_samples * sc->sample_size;
1259
            for (j = 0; j < frames; j++) {
1260
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1261
                /* get chunk duration */
1262
                chunk_duration = 0;
1263
                while (chunk_samples > 0) {
1264
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1265
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1266
                        sc->stts_data[stts_index].count -= chunk_samples;
1267
                        break;
1268
                    } else {
1269
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1270
                        chunk_samples -= sc->stts_data[stts_index].count;
1271
                        if (stts_index + 1 < sc->stts_count)
1272
                            stts_index++;
1273
                    }
1274
                }
1275
                current_offset += sc->bytes_per_frame;
1276
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1277
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1278
                        chunk_size, chunk_duration);
1279
                assert(chunk_duration % sc->time_rate == 0);
1280
                current_dts += chunk_duration / sc->time_rate;
1281
            }
1282
        }
1283
    }
1284
 out:
1285
    /* adjust sample count to avindex entries */
1286
    sc->sample_count = st->nb_index_entries;
1287
}
1288

    
1289
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1290
{
1291
    AVStream *st;
1292
    MOVStreamContext *sc;
1293
    int ret;
1294

    
1295
    st = av_new_stream(c->fc, c->fc->nb_streams);
1296
    if (!st) return AVERROR(ENOMEM);
1297
    sc = av_mallocz(sizeof(MOVStreamContext));
1298
    if (!sc) return AVERROR(ENOMEM);
1299

    
1300
    st->priv_data = sc;
1301
    st->codec->codec_type = CODEC_TYPE_DATA;
1302
    st->start_time = 0; /* XXX: check */
1303

    
1304
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1305
        return ret;
1306

    
1307
    /* sanity checks */
1308
    if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
1309
                           (!sc->sample_size && !sc->sample_count))){
1310
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1311
               st->index);
1312
        sc->sample_count = 0; //ignore track
1313
        return 0;
1314
    }
1315
    if(!sc->time_rate)
1316
        sc->time_rate=1;
1317
    if(!sc->time_scale)
1318
        sc->time_scale= c->time_scale;
1319
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1320

    
1321
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1322
        !st->codec->frame_size && sc->stts_count == 1)
1323
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1324

    
1325
    if(st->duration != AV_NOPTS_VALUE){
1326
        assert(st->duration % sc->time_rate == 0);
1327
        st->duration /= sc->time_rate;
1328
    }
1329
    sc->ffindex = st->index;
1330
    mov_build_index(c, st);
1331

    
1332
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1333
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1334
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1335
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1336
    } else
1337
        sc->pb = c->fc->pb;
1338

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

    
1354
    /* Do not need those anymore. */
1355
    av_freep(&sc->chunk_offsets);
1356
    av_freep(&sc->sample_to_chunk);
1357
    av_freep(&sc->sample_sizes);
1358
    av_freep(&sc->keyframes);
1359
    av_freep(&sc->stts_data);
1360

    
1361
    return 0;
1362
}
1363

    
1364
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1365
{
1366
    uint16_t str_size = get_be16(pb); /* string length */;
1367

    
1368
    get_be16(pb); /* skip language */
1369
    get_buffer(pb, str, FFMIN(size, str_size));
1370
}
1371

    
1372
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1373
{
1374
    uint64_t end = url_ftell(pb) + atom.size;
1375

    
1376
    while (url_ftell(pb) + 8 < end) {
1377
        uint32_t tag_size = get_be32(pb);
1378
        uint32_t tag      = get_le32(pb);
1379
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1380

    
1381
        if (tag_size < 8 || next > end) // stop if tag_size is wrong
1382
            break;
1383

    
1384
        switch (tag) {
1385
        case MKTAG(0xa9,'n','a','m'):
1386
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1387
            break;
1388
        case MKTAG(0xa9,'w','r','t'):
1389
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1390
            break;
1391
        case MKTAG(0xa9,'c','p','y'):
1392
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1393
            break;
1394
        case MKTAG(0xa9,'i','n','f'):
1395
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1396
            break;
1397
        default:
1398
            break;
1399
        }
1400

    
1401
        url_fseek(pb, next, SEEK_SET);
1402
    }
1403

    
1404
    return 0;
1405
}
1406

    
1407
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1408
{
1409
    int i;
1410
    int width;
1411
    int height;
1412
    int64_t disp_transform[2];
1413
    int display_matrix[3][2];
1414
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1415
    int version = get_byte(pb);
1416

    
1417
    get_be24(pb); /* flags */
1418
    /*
1419
    MOV_TRACK_ENABLED 0x0001
1420
    MOV_TRACK_IN_MOVIE 0x0002
1421
    MOV_TRACK_IN_PREVIEW 0x0004
1422
    MOV_TRACK_IN_POSTER 0x0008
1423
    */
1424

    
1425
    if (version == 1) {
1426
        get_be64(pb);
1427
        get_be64(pb);
1428
    } else {
1429
        get_be32(pb); /* creation time */
1430
        get_be32(pb); /* modification time */
1431
    }
1432
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1433
    get_be32(pb); /* reserved */
1434
    st->start_time = 0; /* check */
1435
    /* highlevel (considering edits) duration in movie timebase */
1436
    (version == 1) ? get_be64(pb) : get_be32(pb);
1437
    get_be32(pb); /* reserved */
1438
    get_be32(pb); /* reserved */
1439

    
1440
    get_be16(pb); /* layer */
1441
    get_be16(pb); /* alternate group */
1442
    get_be16(pb); /* volume */
1443
    get_be16(pb); /* reserved */
1444

    
1445
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1446
    // they're kept in fixed point format through all calculations
1447
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1448
    for (i = 0; i < 3; i++) {
1449
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1450
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1451
        get_be32(pb);           // 2.30 fixed point (not used)
1452
    }
1453

    
1454
    width = get_be32(pb);       // 16.16 fixed point track width
1455
    height = get_be32(pb);      // 16.16 fixed point track height
1456

    
1457
    //transform the display width/height according to the matrix
1458
    // skip this if the display matrix is the default identity matrix
1459
    // to keep the same scale, use [width height 1<<16]
1460
    if (width && height &&
1461
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1462
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1463
        display_matrix[2][0]           || display_matrix[2][1])) {
1464
        for (i = 0; i < 2; i++)
1465
            disp_transform[i] =
1466
                (int64_t)  width  * display_matrix[0][i] +
1467
                (int64_t)  height * display_matrix[1][i] +
1468
                ((int64_t) display_matrix[2][i] << 16);
1469

    
1470
        //sample aspect ratio is new width/height divided by old width/height
1471
        st->sample_aspect_ratio = av_d2q(
1472
            ((double) disp_transform[0] * height) /
1473
            ((double) disp_transform[1] * width), INT_MAX);
1474
    }
1475
    return 0;
1476
}
1477

    
1478
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1479
{
1480
    MOVFragment *frag = &c->fragment;
1481
    MOVTrackExt *trex = NULL;
1482
    int flags, track_id, i;
1483

    
1484
    get_byte(pb); /* version */
1485
    flags = get_be24(pb);
1486

    
1487
    track_id = get_be32(pb);
1488
    if (!track_id || track_id > c->fc->nb_streams)
1489
        return -1;
1490
    frag->track_id = track_id;
1491
    for (i = 0; i < c->trex_count; i++)
1492
        if (c->trex_data[i].track_id == frag->track_id) {
1493
            trex = &c->trex_data[i];
1494
            break;
1495
        }
1496
    if (!trex) {
1497
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1498
        return -1;
1499
    }
1500

    
1501
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1502
    else              frag->base_data_offset = frag->moof_offset;
1503
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1504
    else              frag->stsd_id          = trex->stsd_id;
1505

    
1506
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1507
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1508
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1509
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1510
    return 0;
1511
}
1512

    
1513
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1514
{
1515
    MOVTrackExt *trex;
1516

    
1517
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1518
        return -1;
1519
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1520
    if (!c->trex_data)
1521
        return AVERROR(ENOMEM);
1522
    trex = &c->trex_data[c->trex_count++];
1523
    get_byte(pb); /* version */
1524
    get_be24(pb); /* flags */
1525
    trex->track_id = get_be32(pb);
1526
    trex->stsd_id  = get_be32(pb);
1527
    trex->duration = get_be32(pb);
1528
    trex->size     = get_be32(pb);
1529
    trex->flags    = get_be32(pb);
1530
    return 0;
1531
}
1532

    
1533
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1534
{
1535
    MOVFragment *frag = &c->fragment;
1536
    AVStream *st;
1537
    MOVStreamContext *sc;
1538
    uint64_t offset;
1539
    int64_t dts;
1540
    int data_offset = 0;
1541
    unsigned entries, first_sample_flags = frag->flags;
1542
    int flags, distance, i;
1543

    
1544
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1545
        return -1;
1546
    st = c->fc->streams[frag->track_id-1];
1547
    sc = st->priv_data;
1548
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1549
        return 0;
1550
    get_byte(pb); /* version */
1551
    flags = get_be24(pb);
1552
    entries = get_be32(pb);
1553
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1554
    if (flags & 0x001) data_offset        = get_be32(pb);
1555
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1556
    if (flags & 0x800) {
1557
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1558
            return -1;
1559
        sc->ctts_data = av_realloc(sc->ctts_data,
1560
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1561
        if (!sc->ctts_data)
1562
            return AVERROR(ENOMEM);
1563
    }
1564
    dts = st->duration;
1565
    offset = frag->base_data_offset + data_offset;
1566
    distance = 0;
1567
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1568
    for (i = 0; i < entries; i++) {
1569
        unsigned sample_size = frag->size;
1570
        int sample_flags = i ? frag->flags : first_sample_flags;
1571
        unsigned sample_duration = frag->duration;
1572
        int keyframe;
1573

    
1574
        if (flags & 0x100) sample_duration = get_be32(pb);
1575
        if (flags & 0x200) sample_size     = get_be32(pb);
1576
        if (flags & 0x400) sample_flags    = get_be32(pb);
1577
        if (flags & 0x800) {
1578
            sc->ctts_data[sc->ctts_count].count = 1;
1579
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1580
            sc->ctts_count++;
1581
        }
1582
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1583
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1584
            distance = 0;
1585
        av_add_index_entry(st, offset, dts, sample_size, distance,
1586
                           keyframe ? AVINDEX_KEYFRAME : 0);
1587
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1588
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1589
                offset, dts, sample_size, distance, keyframe);
1590
        distance++;
1591
        assert(sample_duration % sc->time_rate == 0);
1592
        dts += sample_duration / sc->time_rate;
1593
        offset += sample_size;
1594
    }
1595
    frag->moof_offset = offset;
1596
    sc->sample_count = st->nb_index_entries;
1597
    st->duration = dts;
1598
    return 0;
1599
}
1600

    
1601
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1602
/* like the files created with Adobe Premiere 5.0, for samples see */
1603
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1604
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1605
{
1606
    int err;
1607

    
1608
    if (atom.size < 8)
1609
        return 0; /* continue */
1610
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1611
        url_fskip(pb, atom.size - 4);
1612
        return 0;
1613
    }
1614
    atom.type = get_le32(pb);
1615
    atom.offset += 8;
1616
    atom.size -= 8;
1617
    if (atom.type != MKTAG('m','d','a','t')) {
1618
        url_fskip(pb, atom.size);
1619
        return 0;
1620
    }
1621
    err = mov_read_mdat(c, pb, atom);
1622
    return err;
1623
}
1624

    
1625
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1626
{
1627
#ifdef CONFIG_ZLIB
1628
    ByteIOContext ctx;
1629
    uint8_t *cmov_data;
1630
    uint8_t *moov_data; /* uncompressed data */
1631
    long cmov_len, moov_len;
1632
    int ret = -1;
1633

    
1634
    get_be32(pb); /* dcom atom */
1635
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1636
        return -1;
1637
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1638
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1639
        return -1;
1640
    }
1641
    get_be32(pb); /* cmvd atom */
1642
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1643
        return -1;
1644
    moov_len = get_be32(pb); /* uncompressed size */
1645
    cmov_len = atom.size - 6 * 4;
1646

    
1647
    cmov_data = av_malloc(cmov_len);
1648
    if (!cmov_data)
1649
        return -1;
1650
    moov_data = av_malloc(moov_len);
1651
    if (!moov_data) {
1652
        av_free(cmov_data);
1653
        return -1;
1654
    }
1655
    get_buffer(pb, cmov_data, cmov_len);
1656
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1657
        goto free_and_return;
1658
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1659
        goto free_and_return;
1660
    atom.type = MKTAG('m','o','o','v');
1661
    atom.offset = 0;
1662
    atom.size = moov_len;
1663
#ifdef DEBUG
1664
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1665
#endif
1666
    ret = mov_read_default(c, &ctx, atom);
1667
free_and_return:
1668
    av_free(moov_data);
1669
    av_free(cmov_data);
1670
    return ret;
1671
#else
1672
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1673
    return -1;
1674
#endif
1675
}
1676

    
1677
/* edit list atom */
1678
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1679
{
1680
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1681
    int i, edit_count;
1682

    
1683
    get_byte(pb); /* version */
1684
    get_be24(pb); /* flags */
1685
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1686

    
1687
    for(i=0; i<edit_count; i++){
1688
        int time;
1689
        get_be32(pb); /* Track duration */
1690
        time = get_be32(pb); /* Media time */
1691
        get_be32(pb); /* Media rate */
1692
        if (time != 0)
1693
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1694
                   "a/v desync might occur, patch welcome\n");
1695
    }
1696
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1697
    return 0;
1698
}
1699

    
1700
static const MOVParseTableEntry mov_default_parse_table[] = {
1701
{ MKTAG('a','v','s','s'), mov_read_extradata },
1702
{ MKTAG('c','o','6','4'), mov_read_stco },
1703
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1704
{ MKTAG('d','i','n','f'), mov_read_default },
1705
{ MKTAG('d','r','e','f'), mov_read_dref },
1706
{ MKTAG('e','d','t','s'), mov_read_default },
1707
{ MKTAG('e','l','s','t'), mov_read_elst },
1708
{ MKTAG('e','n','d','a'), mov_read_enda },
1709
{ MKTAG('f','i','e','l'), mov_read_extradata },
1710
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1711
{ MKTAG('g','l','b','l'), mov_read_glbl },
1712
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1713
{ MKTAG('j','p','2','h'), mov_read_extradata },
1714
{ MKTAG('m','d','a','t'), mov_read_mdat },
1715
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1716
{ MKTAG('m','d','i','a'), mov_read_default },
1717
{ MKTAG('m','i','n','f'), mov_read_default },
1718
{ MKTAG('m','o','o','f'), mov_read_moof },
1719
{ MKTAG('m','o','o','v'), mov_read_moov },
1720
{ MKTAG('m','v','e','x'), mov_read_default },
1721
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1722
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1723
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1724
{ MKTAG('a','v','c','C'), mov_read_glbl },
1725
{ MKTAG('s','t','b','l'), mov_read_default },
1726
{ MKTAG('s','t','c','o'), mov_read_stco },
1727
{ MKTAG('s','t','s','c'), mov_read_stsc },
1728
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1729
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1730
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1731
{ MKTAG('s','t','t','s'), mov_read_stts },
1732
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1733
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1734
{ MKTAG('t','r','a','k'), mov_read_trak },
1735
{ MKTAG('t','r','a','f'), mov_read_default },
1736
{ MKTAG('t','r','e','x'), mov_read_trex },
1737
{ MKTAG('t','r','u','n'), mov_read_trun },
1738
{ MKTAG('u','d','t','a'), mov_read_udta },
1739
{ MKTAG('w','a','v','e'), mov_read_wave },
1740
{ MKTAG('e','s','d','s'), mov_read_esds },
1741
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1742
{ MKTAG('c','m','o','v'), mov_read_cmov },
1743
{ 0, NULL }
1744
};
1745

    
1746
static int mov_probe(AVProbeData *p)
1747
{
1748
    unsigned int offset;
1749
    uint32_t tag;
1750
    int score = 0;
1751

    
1752
    /* check file header */
1753
    offset = 0;
1754
    for(;;) {
1755
        /* ignore invalid offset */
1756
        if ((offset + 8) > (unsigned int)p->buf_size)
1757
            return score;
1758
        tag = AV_RL32(p->buf + offset + 4);
1759
        switch(tag) {
1760
        /* check for obvious tags */
1761
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1762
        case MKTAG('m','o','o','v'):
1763
        case MKTAG('m','d','a','t'):
1764
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1765
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1766
        case MKTAG('f','t','y','p'):
1767
            return AVPROBE_SCORE_MAX;
1768
        /* those are more common words, so rate then a bit less */
1769
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1770
        case MKTAG('w','i','d','e'):
1771
        case MKTAG('f','r','e','e'):
1772
        case MKTAG('j','u','n','k'):
1773
        case MKTAG('p','i','c','t'):
1774
            return AVPROBE_SCORE_MAX - 5;
1775
        case MKTAG(0x82,0x82,0x7f,0x7d):
1776
        case MKTAG('s','k','i','p'):
1777
        case MKTAG('u','u','i','d'):
1778
        case MKTAG('p','r','f','l'):
1779
            offset = AV_RB32(p->buf+offset) + offset;
1780
            /* if we only find those cause probedata is too small at least rate them */
1781
            score = AVPROBE_SCORE_MAX - 50;
1782
            break;
1783
        default:
1784
            /* unrecognized tag */
1785
            return score;
1786
        }
1787
    }
1788
    return score;
1789
}
1790

    
1791
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1792
{
1793
    MOVContext *mov = s->priv_data;
1794
    ByteIOContext *pb = s->pb;
1795
    int err;
1796
    MOV_atom_t atom = { 0, 0, 0 };
1797

    
1798
    mov->fc = s;
1799
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1800
    if(!url_is_streamed(pb))
1801
        atom.size = url_fsize(pb);
1802
    else
1803
        atom.size = INT64_MAX;
1804

    
1805
    /* check MOV header */
1806
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1807
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1808
        return err;
1809
    }
1810
    if (!mov->found_moov) {
1811
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1812
        return -1;
1813
    }
1814
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1815

    
1816
    return 0;
1817
}
1818

    
1819
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1820
{
1821
    MOVContext *mov = s->priv_data;
1822
    MOVStreamContext *sc = 0;
1823
    AVIndexEntry *sample = 0;
1824
    int64_t best_dts = INT64_MAX;
1825
    int i;
1826
 retry:
1827
    for (i = 0; i < s->nb_streams; i++) {
1828
        AVStream *st = s->streams[i];
1829
        MOVStreamContext *msc = st->priv_data;
1830
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1831
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1832
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1833
                                     AV_TIME_BASE, msc->time_scale);
1834
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1835
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1836
                (!url_is_streamed(s->pb) &&
1837
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1838
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1839
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1840
                sample = current_sample;
1841
                best_dts = dts;
1842
                sc = msc;
1843
            }
1844
        }
1845
    }
1846
    if (!sample) {
1847
        mov->found_mdat = 0;
1848
        if (!url_is_streamed(s->pb) ||
1849
            mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1850
            url_feof(s->pb))
1851
            return -1;
1852
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1853
        goto retry;
1854
    }
1855
    /* must be done just before reading, to avoid infinite loop on sample */
1856
    sc->current_sample++;
1857
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1858
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1859
               sc->ffindex, sample->pos);
1860
        return -1;
1861
    }
1862
    av_get_packet(sc->pb, pkt, sample->size);
1863
#ifdef CONFIG_DV_DEMUXER
1864
    if (mov->dv_demux && sc->dv_audio_container) {
1865
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1866
        av_free(pkt->data);
1867
        pkt->size = 0;
1868
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1869
            return -1;
1870
    }
1871
#endif
1872
    pkt->stream_index = sc->ffindex;
1873
    pkt->dts = sample->timestamp;
1874
    if (sc->ctts_data) {
1875
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1876
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1877
        /* update ctts context */
1878
        sc->sample_to_ctime_sample++;
1879
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1880
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1881
            sc->sample_to_ctime_index++;
1882
            sc->sample_to_ctime_sample = 0;
1883
        }
1884
        if (sc->wrong_dts)
1885
            pkt->dts = AV_NOPTS_VALUE;
1886
    } else {
1887
        AVStream *st = s->streams[sc->ffindex];
1888
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
1889
            st->index_entries[sc->current_sample].timestamp : st->duration;
1890
        pkt->duration = next_dts - pkt->dts;
1891
        pkt->pts = pkt->dts;
1892
    }
1893
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1894
    pkt->pos = sample->pos;
1895
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1896
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1897
    return 0;
1898
}
1899

    
1900
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1901
{
1902
    MOVStreamContext *sc = st->priv_data;
1903
    int sample, time_sample;
1904
    int i;
1905

    
1906
    sample = av_index_search_timestamp(st, timestamp, flags);
1907
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1908
    if (sample < 0) /* not sure what to do */
1909
        return -1;
1910
    sc->current_sample = sample;
1911
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1912
    /* adjust ctts index */
1913
    if (sc->ctts_data) {
1914
        time_sample = 0;
1915
        for (i = 0; i < sc->ctts_count; i++) {
1916
            int next = time_sample + sc->ctts_data[i].count;
1917
            if (next > sc->current_sample) {
1918
                sc->sample_to_ctime_index = i;
1919
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1920
                break;
1921
            }
1922
            time_sample = next;
1923
        }
1924
    }
1925
    return sample;
1926
}
1927

    
1928
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1929
{
1930
    AVStream *st;
1931
    int64_t seek_timestamp, timestamp;
1932
    int sample;
1933
    int i;
1934

    
1935
    if (stream_index >= s->nb_streams)
1936
        return -1;
1937

    
1938
    st = s->streams[stream_index];
1939
    sample = mov_seek_stream(st, sample_time, flags);
1940
    if (sample < 0)
1941
        return -1;
1942

    
1943
    /* adjust seek timestamp to found sample timestamp */
1944
    seek_timestamp = st->index_entries[sample].timestamp;
1945

    
1946
    for (i = 0; i < s->nb_streams; i++) {
1947
        st = s->streams[i];
1948
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1949
            continue;
1950

    
1951
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1952
        mov_seek_stream(st, timestamp, flags);
1953
    }
1954
    return 0;
1955
}
1956

    
1957
static int mov_read_close(AVFormatContext *s)
1958
{
1959
    int i, j;
1960
    MOVContext *mov = s->priv_data;
1961
    for(i=0; i<s->nb_streams; i++) {
1962
        MOVStreamContext *sc = s->streams[i]->priv_data;
1963
        av_freep(&sc->ctts_data);
1964
        for (j=0; j<sc->drefs_count; j++)
1965
            av_freep(&sc->drefs[j].path);
1966
        av_freep(&sc->drefs);
1967
        if (sc->pb && sc->pb != s->pb)
1968
            url_fclose(sc->pb);
1969
    }
1970
    if(mov->dv_demux){
1971
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1972
            av_freep(&mov->dv_fctx->streams[i]->codec);
1973
            av_freep(&mov->dv_fctx->streams[i]);
1974
        }
1975
        av_freep(&mov->dv_fctx);
1976
        av_freep(&mov->dv_demux);
1977
    }
1978
    av_freep(&mov->trex_data);
1979
    return 0;
1980
}
1981

    
1982
AVInputFormat mov_demuxer = {
1983
    "mov,mp4,m4a,3gp,3g2,mj2",
1984
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
1985
    sizeof(MOVContext),
1986
    mov_probe,
1987
    mov_read_header,
1988
    mov_read_packet,
1989
    mov_read_close,
1990
    mov_read_seek,
1991
};