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ffmpeg / libavformat / mov.c @ fefe43ff

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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.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
#include <limits.h>
23

    
24
//#define DEBUG
25

    
26
#include "libavutil/intreadwrite.h"
27
#include "libavutil/avstring.h"
28
#include "avformat.h"
29
#include "riff.h"
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#include "isom.h"
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#include "dv.h"
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#include "libavcodec/mpeg4audio.h"
33
#include "libavcodec/mpegaudiodata.h"
34

    
35
#if CONFIG_ZLIB
36
#include <zlib.h>
37
#endif
38

    
39
/*
40
 * First version by Francois Revol revol@free.fr
41
 * Seek function by Gael Chardon gael.dev@4now.net
42
 *
43
 * Features and limitations:
44
 * - reads most of the QT files I have (at least the structure),
45
 *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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 * - the code is quite ugly... maybe I won't do it recursive next time :-)
47
 *
48
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
50
 *
51
 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
53
 * Apple:
54
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
56
 * QuickTime is a trademark of Apple (AFAIK :))
57
 */
58

    
59
#include "qtpalette.h"
60

    
61

    
62
#undef NDEBUG
63
#include <assert.h>
64

    
65
/* the QuickTime file format is quite convoluted...
66
 * it has lots of index tables, each indexing something in another one...
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 * Here we just use what is needed to read the chunks
68
 */
69

    
70
typedef struct {
71
    int first;
72
    int count;
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    int id;
74
} MOVStsc;
75

    
76
typedef struct {
77
    uint32_t type;
78
    char *path;
79
} MOVDref;
80

    
81
typedef struct {
82
    uint32_t type;
83
    int64_t offset;
84
    int64_t size; /* total size (excluding the size and type fields) */
85
} MOVAtom;
86

    
87
struct MOVParseTableEntry;
88

    
89
typedef struct {
90
    unsigned track_id;
91
    uint64_t base_data_offset;
92
    uint64_t moof_offset;
93
    unsigned stsd_id;
94
    unsigned duration;
95
    unsigned size;
96
    unsigned flags;
97
} MOVFragment;
98

    
99
typedef struct {
100
    unsigned track_id;
101
    unsigned stsd_id;
102
    unsigned duration;
103
    unsigned size;
104
    unsigned flags;
105
} MOVTrackExt;
106

    
107
typedef struct MOVStreamContext {
108
    ByteIOContext *pb;
109
    int ffindex; /* the ffmpeg stream id */
110
    int next_chunk;
111
    unsigned int chunk_count;
112
    int64_t *chunk_offsets;
113
    unsigned int stts_count;
114
    MOVStts *stts_data;
115
    unsigned int ctts_count;
116
    MOVStts *ctts_data;
117
    unsigned int stsc_count;
118
    MOVStsc *stsc_data;
119
    int ctts_index;
120
    int ctts_sample;
121
    unsigned int sample_size;
122
    unsigned int sample_count;
123
    int *sample_sizes;
124
    unsigned int keyframe_count;
125
    int *keyframes;
126
    int time_scale;
127
    int time_rate;
128
    int time_offset; ///< time offset of the first edit list entry
129
    int current_sample;
130
    unsigned int bytes_per_frame;
131
    unsigned int samples_per_frame;
132
    int dv_audio_container;
133
    int pseudo_stream_id; ///< -1 means demux all ids
134
    int16_t audio_cid; ///< stsd audio compression id
135
    unsigned drefs_count;
136
    MOVDref *drefs;
137
    int dref_id;
138
    int wrong_dts; ///< dts are wrong due to negative ctts
139
    int width;  ///< tkhd width
140
    int height; ///< tkhd height
141
} MOVStreamContext;
142

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

    
159

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

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

    
173
static const MOVParseTableEntry mov_default_parse_table[];
174

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

    
182
    a.offset = atom.offset;
183

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

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

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

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

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

    
236
    return err;
237
}
238

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

    
245
    get_be32(pb); // version + flags
246
    entries = get_be32(pb);
247
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
248
        return -1;
249
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
250
    if (!sc->drefs)
251
        return AVERROR(ENOMEM);
252
    sc->drefs_count = entries;
253

    
254
    for (i = 0; i < sc->drefs_count; i++) {
255
        MOVDref *dref = &sc->drefs[i];
256
        uint32_t size = get_be32(pb);
257
        int64_t next = url_ftell(pb) + size - 4;
258

    
259
        dref->type = get_le32(pb);
260
        get_be32(pb); // version + flags
261
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
262

    
263
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
264
            /* macintosh alias record */
265
            uint16_t volume_len, len;
266
            char volume[28];
267
            int16_t type;
268

    
269
            url_fskip(pb, 10);
270

    
271
            volume_len = get_byte(pb);
272
            volume_len = FFMIN(volume_len, 27);
273
            get_buffer(pb, volume, 27);
274
            volume[volume_len] = 0;
275
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
276

    
277
            url_fskip(pb, 112);
278

    
279
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
280
                type = get_be16(pb);
281
                len = get_be16(pb);
282
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
283
                if (len&1)
284
                    len += 1;
285
                if (type == 2) { // absolute path
286
                    av_free(dref->path);
287
                    dref->path = av_mallocz(len+1);
288
                    if (!dref->path)
289
                        return AVERROR(ENOMEM);
290
                    get_buffer(pb, dref->path, len);
291
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
292
                        len -= volume_len;
293
                        memmove(dref->path, dref->path+volume_len, len);
294
                        dref->path[len] = 0;
295
                    }
296
                    for (j = 0; j < len; j++)
297
                        if (dref->path[j] == ':')
298
                            dref->path[j] = '/';
299
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
300
                } else
301
                    url_fskip(pb, len);
302
            }
303
        }
304
        url_fseek(pb, next, SEEK_SET);
305
    }
306
    return 0;
307
}
308

    
309
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
310
{
311
    AVStream *st;
312
    uint32_t type;
313
    uint32_t ctype;
314

    
315
    if (c->fc->nb_streams < 1) // meta before first trak
316
        return 0;
317

    
318
    st = c->fc->streams[c->fc->nb_streams-1];
319

    
320
    get_byte(pb); /* version */
321
    get_be24(pb); /* flags */
322

    
323
    /* component type */
324
    ctype = get_le32(pb);
325
    type = get_le32(pb); /* component subtype */
326

    
327
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
328
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
329
    dprintf(c->fc, "stype= %c%c%c%c\n",
330
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
331
    if(!ctype)
332
        c->isom = 1;
333
    if     (type == MKTAG('v','i','d','e'))
334
        st->codec->codec_type = CODEC_TYPE_VIDEO;
335
    else if(type == MKTAG('s','o','u','n'))
336
        st->codec->codec_type = CODEC_TYPE_AUDIO;
337
    else if(type == MKTAG('m','1','a',' '))
338
        st->codec->codec_id = CODEC_ID_MP2;
339
    else if(type == MKTAG('s','u','b','p')) {
340
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
341
    }
342
    get_be32(pb); /* component  manufacture */
343
    get_be32(pb); /* component flags */
344
    get_be32(pb); /* component flags mask */
345

    
346
    if(atom.size <= 24)
347
        return 0; /* nothing left to read */
348

    
349
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
350
    return 0;
351
}
352

    
353
static int mp4_read_descr_len(ByteIOContext *pb)
354
{
355
    int len = 0;
356
    int count = 4;
357
    while (count--) {
358
        int c = get_byte(pb);
359
        len = (len << 7) | (c & 0x7f);
360
        if (!(c & 0x80))
361
            break;
362
    }
363
    return len;
364
}
365

    
366
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
367
{
368
    int len;
369
    *tag = get_byte(pb);
370
    len = mp4_read_descr_len(pb);
371
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
372
    return len;
373
}
374

    
375
#define MP4ESDescrTag                   0x03
376
#define MP4DecConfigDescrTag            0x04
377
#define MP4DecSpecificDescrTag          0x05
378

    
379
static const AVCodecTag mp4_audio_types[] = {
380
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
381
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
382
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
383
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
384
    { CODEC_ID_NONE,    0 },
385
};
386

    
387
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
388
{
389
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
390
    int tag, len;
391

    
392
    get_be32(pb); /* version + flags */
393
    len = mp4_read_descr(c, pb, &tag);
394
    if (tag == MP4ESDescrTag) {
395
        get_be16(pb); /* ID */
396
        get_byte(pb); /* priority */
397
    } else
398
        get_be16(pb); /* ID */
399

    
400
    len = mp4_read_descr(c, pb, &tag);
401
    if (tag == MP4DecConfigDescrTag) {
402
        int object_type_id = get_byte(pb);
403
        get_byte(pb); /* stream type */
404
        get_be24(pb); /* buffer size db */
405
        get_be32(pb); /* max bitrate */
406
        get_be32(pb); /* avg bitrate */
407

    
408
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
409
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
410
        len = mp4_read_descr(c, pb, &tag);
411
        if (tag == MP4DecSpecificDescrTag) {
412
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
413
            if((uint64_t)len > (1<<30))
414
                return -1;
415
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
416
            if (!st->codec->extradata)
417
                return AVERROR(ENOMEM);
418
            get_buffer(pb, st->codec->extradata, len);
419
            st->codec->extradata_size = len;
420
            if (st->codec->codec_id == CODEC_ID_AAC) {
421
                MPEG4AudioConfig cfg;
422
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
423
                                         st->codec->extradata_size);
424
                if (cfg.chan_config > 7)
425
                    return -1;
426
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
427
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
428
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
429
                else
430
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
431
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
432
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
433
                        cfg.object_type, cfg.ext_object_type,
434
                        cfg.sample_rate, cfg.ext_sample_rate);
435
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
436
                                                         cfg.object_type)))
437
                    st->codec->codec_id = CODEC_ID_AAC;
438
            }
439
        }
440
    }
441
    return 0;
442
}
443

    
444
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
445
{
446
    const int num = get_be32(pb);
447
    const int den = get_be32(pb);
448
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
449
    if (den != 0) {
450
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
451
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
452
            av_log(c->fc, AV_LOG_WARNING,
453
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
454
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
455
        st->sample_aspect_ratio.num = num;
456
        st->sample_aspect_ratio.den = den;
457
    }
458
    return 0;
459
}
460

    
461
/* this atom contains actual media data */
462
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
463
{
464
    if(atom.size == 0) /* wrong one (MP4) */
465
        return 0;
466
    c->found_mdat=1;
467
    return 0; /* now go for moov */
468
}
469

    
470
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
471
{
472
    uint32_t type = get_le32(pb);
473

    
474
    if (type != MKTAG('q','t',' ',' '))
475
        c->isom = 1;
476
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
477
    get_be32(pb); /* minor version */
478
    url_fskip(pb, atom.size - 8);
479
    return 0;
480
}
481

    
482
/* this atom should contain all header atoms */
483
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
484
{
485
    if (mov_read_default(c, pb, atom) < 0)
486
        return -1;
487
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
488
    /* so we don't parse the whole file if over a network */
489
    c->found_moov=1;
490
    return 0; /* now go for mdat */
491
}
492

    
493
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
494
{
495
    c->fragment.moof_offset = url_ftell(pb) - 8;
496
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
497
    return mov_read_default(c, pb, atom);
498
}
499

    
500
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
501
{
502
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
503
    MOVStreamContext *sc = st->priv_data;
504
    int version = get_byte(pb);
505
    char language[4] = {0};
506
    unsigned lang;
507

    
508
    if (version > 1)
509
        return -1; /* unsupported */
510

    
511
    get_be24(pb); /* flags */
512
    if (version == 1) {
513
        get_be64(pb);
514
        get_be64(pb);
515
    } else {
516
        get_be32(pb); /* creation time */
517
        get_be32(pb); /* modification time */
518
    }
519

    
520
    sc->time_scale = get_be32(pb);
521
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
522

    
523
    lang = get_be16(pb); /* language */
524
    if (ff_mov_lang_to_iso639(lang, language))
525
        av_metadata_set(&st->metadata, "language", language);
526
    get_be16(pb); /* quality */
527

    
528
    return 0;
529
}
530

    
531
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
532
{
533
    int version = get_byte(pb); /* version */
534
    get_be24(pb); /* flags */
535

    
536
    if (version == 1) {
537
        get_be64(pb);
538
        get_be64(pb);
539
    } else {
540
        get_be32(pb); /* creation time */
541
        get_be32(pb); /* modification time */
542
    }
543
    c->time_scale = get_be32(pb); /* time scale */
544

    
545
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
546

    
547
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
548
    get_be32(pb); /* preferred scale */
549

    
550
    get_be16(pb); /* preferred volume */
551

    
552
    url_fskip(pb, 10); /* reserved */
553

    
554
    url_fskip(pb, 36); /* display matrix */
555

    
556
    get_be32(pb); /* preview time */
557
    get_be32(pb); /* preview duration */
558
    get_be32(pb); /* poster time */
559
    get_be32(pb); /* selection time */
560
    get_be32(pb); /* selection duration */
561
    get_be32(pb); /* current time */
562
    get_be32(pb); /* next track ID */
563

    
564
    return 0;
565
}
566

    
567
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
568
{
569
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
570

    
571
    if((uint64_t)atom.size > (1<<30))
572
        return -1;
573

    
574
    // currently SVQ3 decoder expect full STSD header - so let's fake it
575
    // this should be fixed and just SMI header should be passed
576
    av_free(st->codec->extradata);
577
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
578
    if (!st->codec->extradata)
579
        return AVERROR(ENOMEM);
580
    st->codec->extradata_size = 0x5a + atom.size;
581
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
582
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
583
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
584
    return 0;
585
}
586

    
587
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
588
{
589
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
590
    int little_endian = get_be16(pb);
591

    
592
    dprintf(c->fc, "enda %d\n", little_endian);
593
    if (little_endian == 1) {
594
        switch (st->codec->codec_id) {
595
        case CODEC_ID_PCM_S24BE:
596
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
597
            break;
598
        case CODEC_ID_PCM_S32BE:
599
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
600
            break;
601
        case CODEC_ID_PCM_F32BE:
602
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
603
            break;
604
        case CODEC_ID_PCM_F64BE:
605
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
606
            break;
607
        default:
608
            break;
609
        }
610
    }
611
    return 0;
612
}
613

    
614
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
615
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
616
{
617
    AVStream *st;
618
    uint64_t size;
619
    uint8_t *buf;
620

    
621
    if (c->fc->nb_streams < 1) // will happen with jp2 files
622
        return 0;
623
    st= c->fc->streams[c->fc->nb_streams-1];
624
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
625
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
626
        return -1;
627
    buf= av_realloc(st->codec->extradata, size);
628
    if(!buf)
629
        return -1;
630
    st->codec->extradata= buf;
631
    buf+= st->codec->extradata_size;
632
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
633
    AV_WB32(       buf    , atom.size + 8);
634
    AV_WL32(       buf + 4, atom.type);
635
    get_buffer(pb, buf + 8, atom.size);
636
    return 0;
637
}
638

    
639
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
640
{
641
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
642

    
643
    if((uint64_t)atom.size > (1<<30))
644
        return -1;
645

    
646
    if (st->codec->codec_id == CODEC_ID_QDM2) {
647
        // pass all frma atom to codec, needed at least for QDM2
648
        av_free(st->codec->extradata);
649
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
650
        if (!st->codec->extradata)
651
            return AVERROR(ENOMEM);
652
        st->codec->extradata_size = atom.size;
653
        get_buffer(pb, st->codec->extradata, atom.size);
654
    } else if (atom.size > 8) { /* to read frma, esds atoms */
655
        if (mov_read_default(c, pb, atom) < 0)
656
            return -1;
657
    } else
658
        url_fskip(pb, atom.size);
659
    return 0;
660
}
661

    
662
/**
663
 * This function reads atom content and puts data in extradata without tag
664
 * nor size unlike mov_read_extradata.
665
 */
666
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
667
{
668
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
669

    
670
    if((uint64_t)atom.size > (1<<30))
671
        return -1;
672

    
673
    av_free(st->codec->extradata);
674
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
675
    if (!st->codec->extradata)
676
        return AVERROR(ENOMEM);
677
    st->codec->extradata_size = atom.size;
678
    get_buffer(pb, st->codec->extradata, atom.size);
679
    return 0;
680
}
681

    
682
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
683
{
684
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
685
    MOVStreamContext *sc = st->priv_data;
686
    unsigned int i, entries;
687

    
688
    get_byte(pb); /* version */
689
    get_be24(pb); /* flags */
690

    
691
    entries = get_be32(pb);
692

    
693
    if(entries >= UINT_MAX/sizeof(int64_t))
694
        return -1;
695

    
696
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
697
    if (!sc->chunk_offsets)
698
        return AVERROR(ENOMEM);
699
    sc->chunk_count = entries;
700

    
701
    if      (atom.type == MKTAG('s','t','c','o'))
702
        for(i=0; i<entries; i++)
703
            sc->chunk_offsets[i] = get_be32(pb);
704
    else if (atom.type == MKTAG('c','o','6','4'))
705
        for(i=0; i<entries; i++)
706
            sc->chunk_offsets[i] = get_be64(pb);
707
    else
708
        return -1;
709

    
710
    return 0;
711
}
712

    
713
/**
714
 * Compute codec id for 'lpcm' tag.
715
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
716
 */
717
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
718
{
719
    if (flags & 1) { // floating point
720
        if (flags & 2) { // big endian
721
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
722
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
723
        } else {
724
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
725
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
726
        }
727
    } else {
728
        if (flags & 2) {
729
            if      (bps == 8)
730
                // signed integer
731
                if (flags & 4)  return CODEC_ID_PCM_S8;
732
                else            return CODEC_ID_PCM_U8;
733
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
734
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
735
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
736
        } else {
737
            if      (bps == 8)
738
                if (flags & 4)  return CODEC_ID_PCM_S8;
739
                else            return CODEC_ID_PCM_U8;
740
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
741
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
742
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
743
        }
744
    }
745
    return CODEC_ID_NONE;
746
}
747

    
748
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
749
{
750
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
751
    MOVStreamContext *sc = st->priv_data;
752
    int j, entries, pseudo_stream_id;
753

    
754
    get_byte(pb); /* version */
755
    get_be24(pb); /* flags */
756

    
757
    entries = get_be32(pb);
758

    
759
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
760
        //Parsing Sample description table
761
        enum CodecID id;
762
        int dref_id;
763
        MOVAtom a = { 0, 0, 0 };
764
        int64_t start_pos = url_ftell(pb);
765
        int size = get_be32(pb); /* size */
766
        uint32_t format = get_le32(pb); /* data format */
767

    
768
        get_be32(pb); /* reserved */
769
        get_be16(pb); /* reserved */
770
        dref_id = get_be16(pb);
771

    
772
        if (st->codec->codec_tag &&
773
            st->codec->codec_tag != format &&
774
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
775
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
776
           ){
777
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
778
             * export it as a separate AVStream but this needs a few changes
779
             * in the MOV demuxer, patch welcome. */
780
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
781
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
782
            continue;
783
        }
784
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
785
        sc->dref_id= dref_id;
786

    
787
        st->codec->codec_tag = format;
788
        id = codec_get_id(codec_movaudio_tags, format);
789
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
790
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
791

    
792
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
793
            st->codec->codec_type = CODEC_TYPE_AUDIO;
794
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
795
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
796
            id = codec_get_id(codec_movvideo_tags, format);
797
            if (id <= 0)
798
                id = codec_get_id(codec_bmp_tags, format);
799
            if (id > 0)
800
                st->codec->codec_type = CODEC_TYPE_VIDEO;
801
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
802
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
803
                if(id > 0)
804
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
805
            }
806
        }
807

    
808
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
809
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
810
                (format >> 24) & 0xff, st->codec->codec_type);
811

    
812
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
813
            uint8_t codec_name[32];
814
            unsigned int color_depth;
815
            int color_greyscale;
816

    
817
            st->codec->codec_id = id;
818
            get_be16(pb); /* version */
819
            get_be16(pb); /* revision level */
820
            get_be32(pb); /* vendor */
821
            get_be32(pb); /* temporal quality */
822
            get_be32(pb); /* spatial quality */
823

    
824
            st->codec->width = get_be16(pb); /* width */
825
            st->codec->height = get_be16(pb); /* height */
826

    
827
            get_be32(pb); /* horiz resolution */
828
            get_be32(pb); /* vert resolution */
829
            get_be32(pb); /* data size, always 0 */
830
            get_be16(pb); /* frames per samples */
831

    
832
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
833
            if (codec_name[0] <= 31) {
834
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
835
                st->codec->codec_name[codec_name[0]] = 0;
836
            }
837

    
838
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
839
            st->codec->color_table_id = get_be16(pb); /* colortable id */
840
            dprintf(c->fc, "depth %d, ctab id %d\n",
841
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
842
            /* figure out the palette situation */
843
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
844
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
845

    
846
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
847
            if ((color_depth == 2) || (color_depth == 4) ||
848
                (color_depth == 8)) {
849
                /* for palette traversal */
850
                unsigned int color_start, color_count, color_end;
851
                unsigned char r, g, b;
852

    
853
                if (color_greyscale) {
854
                    int color_index, color_dec;
855
                    /* compute the greyscale palette */
856
                    st->codec->bits_per_coded_sample = color_depth;
857
                    color_count = 1 << color_depth;
858
                    color_index = 255;
859
                    color_dec = 256 / (color_count - 1);
860
                    for (j = 0; j < color_count; j++) {
861
                        r = g = b = color_index;
862
                        c->palette_control.palette[j] =
863
                            (r << 16) | (g << 8) | (b);
864
                        color_index -= color_dec;
865
                        if (color_index < 0)
866
                            color_index = 0;
867
                    }
868
                } else if (st->codec->color_table_id) {
869
                    const uint8_t *color_table;
870
                    /* if flag bit 3 is set, use the default palette */
871
                    color_count = 1 << color_depth;
872
                    if (color_depth == 2)
873
                        color_table = ff_qt_default_palette_4;
874
                    else if (color_depth == 4)
875
                        color_table = ff_qt_default_palette_16;
876
                    else
877
                        color_table = ff_qt_default_palette_256;
878

    
879
                    for (j = 0; j < color_count; j++) {
880
                        r = color_table[j * 4 + 0];
881
                        g = color_table[j * 4 + 1];
882
                        b = color_table[j * 4 + 2];
883
                        c->palette_control.palette[j] =
884
                            (r << 16) | (g << 8) | (b);
885
                    }
886
                } else {
887
                    /* load the palette from the file */
888
                    color_start = get_be32(pb);
889
                    color_count = get_be16(pb);
890
                    color_end = get_be16(pb);
891
                    if ((color_start <= 255) &&
892
                        (color_end <= 255)) {
893
                        for (j = color_start; j <= color_end; j++) {
894
                            /* each R, G, or B component is 16 bits;
895
                             * only use the top 8 bits; skip alpha bytes
896
                             * up front */
897
                            get_byte(pb);
898
                            get_byte(pb);
899
                            r = get_byte(pb);
900
                            get_byte(pb);
901
                            g = get_byte(pb);
902
                            get_byte(pb);
903
                            b = get_byte(pb);
904
                            get_byte(pb);
905
                            c->palette_control.palette[j] =
906
                                (r << 16) | (g << 8) | (b);
907
                        }
908
                    }
909
                }
910
                st->codec->palctrl = &c->palette_control;
911
                st->codec->palctrl->palette_changed = 1;
912
            } else
913
                st->codec->palctrl = NULL;
914
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
915
            int bits_per_sample, flags;
916
            uint16_t version = get_be16(pb);
917

    
918
            st->codec->codec_id = id;
919
            get_be16(pb); /* revision level */
920
            get_be32(pb); /* vendor */
921

    
922
            st->codec->channels = get_be16(pb);             /* channel count */
923
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
924
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
925

    
926
            sc->audio_cid = get_be16(pb);
927
            get_be16(pb); /* packet size = 0 */
928

    
929
            st->codec->sample_rate = ((get_be32(pb) >> 16));
930

    
931
            //Read QT version 1 fields. In version 0 these do not exist.
932
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
933
            if(!c->isom) {
934
                if(version==1) {
935
                    sc->samples_per_frame = get_be32(pb);
936
                    get_be32(pb); /* bytes per packet */
937
                    sc->bytes_per_frame = get_be32(pb);
938
                    get_be32(pb); /* bytes per sample */
939
                } else if(version==2) {
940
                    get_be32(pb); /* sizeof struct only */
941
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
942
                    st->codec->channels = get_be32(pb);
943
                    get_be32(pb); /* always 0x7F000000 */
944
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
945
                    flags = get_be32(pb); /* lcpm format specific flag */
946
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
947
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
948
                    if (format == MKTAG('l','p','c','m'))
949
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
950
                }
951
            }
952

    
953
            switch (st->codec->codec_id) {
954
            case CODEC_ID_PCM_S8:
955
            case CODEC_ID_PCM_U8:
956
                if (st->codec->bits_per_coded_sample == 16)
957
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
958
                break;
959
            case CODEC_ID_PCM_S16LE:
960
            case CODEC_ID_PCM_S16BE:
961
                if (st->codec->bits_per_coded_sample == 8)
962
                    st->codec->codec_id = CODEC_ID_PCM_S8;
963
                else if (st->codec->bits_per_coded_sample == 24)
964
                    st->codec->codec_id =
965
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
966
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
967
                break;
968
            /* set values for old format before stsd version 1 appeared */
969
            case CODEC_ID_MACE3:
970
                sc->samples_per_frame = 6;
971
                sc->bytes_per_frame = 2*st->codec->channels;
972
                break;
973
            case CODEC_ID_MACE6:
974
                sc->samples_per_frame = 6;
975
                sc->bytes_per_frame = 1*st->codec->channels;
976
                break;
977
            case CODEC_ID_ADPCM_IMA_QT:
978
                sc->samples_per_frame = 64;
979
                sc->bytes_per_frame = 34*st->codec->channels;
980
                break;
981
            case CODEC_ID_GSM:
982
                sc->samples_per_frame = 160;
983
                sc->bytes_per_frame = 33;
984
                break;
985
            default:
986
                break;
987
            }
988

    
989
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
990
            if (bits_per_sample) {
991
                st->codec->bits_per_coded_sample = bits_per_sample;
992
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
993
            }
994
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
995
            // ttxt stsd contains display flags, justification, background
996
            // color, fonts, and default styles, so fake an atom to read it
997
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
998
            mov_read_glbl(c, pb, fake_atom);
999
            st->codec->codec_id= id;
1000
            st->codec->width = sc->width;
1001
            st->codec->height = sc->height;
1002
        } else {
1003
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1004
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1005
        }
1006
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1007
        a.size = size - (url_ftell(pb) - start_pos);
1008
        if (a.size > 8) {
1009
            if (mov_read_default(c, pb, a) < 0)
1010
                return -1;
1011
        } else if (a.size > 0)
1012
            url_fskip(pb, a.size);
1013
    }
1014

    
1015
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1016
        st->codec->sample_rate= sc->time_scale;
1017

    
1018
    /* special codec parameters handling */
1019
    switch (st->codec->codec_id) {
1020
#if CONFIG_DV_DEMUXER
1021
    case CODEC_ID_DVAUDIO:
1022
        c->dv_fctx = avformat_alloc_context();
1023
        c->dv_demux = dv_init_demux(c->dv_fctx);
1024
        if (!c->dv_demux) {
1025
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1026
            return -1;
1027
        }
1028
        sc->dv_audio_container = 1;
1029
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1030
        break;
1031
#endif
1032
    /* no ifdef since parameters are always those */
1033
    case CODEC_ID_QCELP:
1034
        st->codec->frame_size= 160;
1035
        st->codec->channels= 1; /* really needed */
1036
        break;
1037
    case CODEC_ID_AMR_NB:
1038
    case CODEC_ID_AMR_WB:
1039
        st->codec->frame_size= sc->samples_per_frame;
1040
        st->codec->channels= 1; /* really needed */
1041
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1042
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1043
            st->codec->sample_rate = 8000;
1044
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1045
            st->codec->sample_rate = 16000;
1046
        break;
1047
    case CODEC_ID_MP2:
1048
    case CODEC_ID_MP3:
1049
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1050
        st->need_parsing = AVSTREAM_PARSE_FULL;
1051
        break;
1052
    case CODEC_ID_GSM:
1053
    case CODEC_ID_ADPCM_MS:
1054
    case CODEC_ID_ADPCM_IMA_WAV:
1055
        st->codec->block_align = sc->bytes_per_frame;
1056
        break;
1057
    case CODEC_ID_ALAC:
1058
        if (st->codec->extradata_size == 36) {
1059
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1060
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1061
        }
1062
        break;
1063
    default:
1064
        break;
1065
    }
1066

    
1067
    return 0;
1068
}
1069

    
1070
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1071
{
1072
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1073
    MOVStreamContext *sc = st->priv_data;
1074
    unsigned int i, entries;
1075

    
1076
    get_byte(pb); /* version */
1077
    get_be24(pb); /* flags */
1078

    
1079
    entries = get_be32(pb);
1080

    
1081
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1082

    
1083
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1084
        return -1;
1085
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1086
    if (!sc->stsc_data)
1087
        return AVERROR(ENOMEM);
1088
    sc->stsc_count = entries;
1089

    
1090
    for(i=0; i<entries; i++) {
1091
        sc->stsc_data[i].first = get_be32(pb);
1092
        sc->stsc_data[i].count = get_be32(pb);
1093
        sc->stsc_data[i].id = get_be32(pb);
1094
    }
1095
    return 0;
1096
}
1097

    
1098
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1099
{
1100
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1101
    MOVStreamContext *sc = st->priv_data;
1102
    unsigned int i, entries;
1103

    
1104
    get_byte(pb); /* version */
1105
    get_be24(pb); /* flags */
1106

    
1107
    entries = get_be32(pb);
1108

    
1109
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1110

    
1111
    if(entries >= UINT_MAX / sizeof(int))
1112
        return -1;
1113
    sc->keyframes = av_malloc(entries * sizeof(int));
1114
    if (!sc->keyframes)
1115
        return AVERROR(ENOMEM);
1116
    sc->keyframe_count = entries;
1117

    
1118
    for(i=0; i<entries; i++) {
1119
        sc->keyframes[i] = get_be32(pb);
1120
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1121
    }
1122
    return 0;
1123
}
1124

    
1125
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1126
{
1127
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1128
    MOVStreamContext *sc = st->priv_data;
1129
    unsigned int i, entries, sample_size;
1130

    
1131
    get_byte(pb); /* version */
1132
    get_be24(pb); /* flags */
1133

    
1134
    sample_size = get_be32(pb);
1135
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1136
        sc->sample_size = sample_size;
1137
    entries = get_be32(pb);
1138

    
1139
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1140

    
1141
    sc->sample_count = entries;
1142
    if (sample_size)
1143
        return 0;
1144

    
1145
    if(entries >= UINT_MAX / sizeof(int))
1146
        return -1;
1147
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1148
    if (!sc->sample_sizes)
1149
        return AVERROR(ENOMEM);
1150

    
1151
    for(i=0; i<entries; i++)
1152
        sc->sample_sizes[i] = get_be32(pb);
1153
    return 0;
1154
}
1155

    
1156
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1157
{
1158
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1159
    MOVStreamContext *sc = st->priv_data;
1160
    unsigned int i, entries;
1161
    int64_t duration=0;
1162
    int64_t total_sample_count=0;
1163

    
1164
    get_byte(pb); /* version */
1165
    get_be24(pb); /* flags */
1166
    entries = get_be32(pb);
1167

    
1168
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1169

    
1170
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1171
        return -1;
1172
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1173
    if (!sc->stts_data)
1174
        return AVERROR(ENOMEM);
1175
    sc->stts_count = entries;
1176

    
1177
    for(i=0; i<entries; i++) {
1178
        int sample_duration;
1179
        int sample_count;
1180

    
1181
        sample_count=get_be32(pb);
1182
        sample_duration = get_be32(pb);
1183
        sc->stts_data[i].count= sample_count;
1184
        sc->stts_data[i].duration= sample_duration;
1185

    
1186
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1187

    
1188
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1189

    
1190
        duration+=(int64_t)sample_duration*sample_count;
1191
        total_sample_count+=sample_count;
1192
    }
1193

    
1194
    st->nb_frames= total_sample_count;
1195
    if(duration)
1196
        st->duration= duration;
1197
    return 0;
1198
}
1199

    
1200
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1201
{
1202
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1203
    MOVStreamContext *sc = st->priv_data;
1204
    unsigned int i, entries;
1205

    
1206
    get_byte(pb); /* version */
1207
    get_be24(pb); /* flags */
1208
    entries = get_be32(pb);
1209

    
1210
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1211

    
1212
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1213
        return -1;
1214
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1215
    if (!sc->ctts_data)
1216
        return AVERROR(ENOMEM);
1217
    sc->ctts_count = entries;
1218

    
1219
    for(i=0; i<entries; i++) {
1220
        int count    =get_be32(pb);
1221
        int duration =get_be32(pb);
1222

    
1223
        if (duration < 0) {
1224
            sc->wrong_dts = 1;
1225
            st->codec->has_b_frames = 1;
1226
        }
1227
        sc->ctts_data[i].count   = count;
1228
        sc->ctts_data[i].duration= duration;
1229

    
1230
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1231
    }
1232
    return 0;
1233
}
1234

    
1235
static void mov_build_index(MOVContext *mov, AVStream *st)
1236
{
1237
    MOVStreamContext *sc = st->priv_data;
1238
    int64_t current_offset;
1239
    int64_t current_dts = 0;
1240
    unsigned int stts_index = 0;
1241
    unsigned int stsc_index = 0;
1242
    unsigned int stss_index = 0;
1243
    unsigned int i, j;
1244

    
1245
    /* adjust first dts according to edit list */
1246
    if (sc->time_offset) {
1247
        assert(sc->time_offset % sc->time_rate == 0);
1248
        current_dts = - (sc->time_offset / sc->time_rate);
1249
    }
1250

    
1251
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1252
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1253
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1254
        unsigned int current_sample = 0;
1255
        unsigned int stts_sample = 0;
1256
        unsigned int keyframe, sample_size;
1257
        unsigned int distance = 0;
1258
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1259

    
1260
        st->nb_frames = sc->sample_count;
1261
        for (i = 0; i < sc->chunk_count; i++) {
1262
            current_offset = sc->chunk_offsets[i];
1263
            if (stsc_index + 1 < sc->stsc_count &&
1264
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1265
                stsc_index++;
1266
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1267
                if (current_sample >= sc->sample_count) {
1268
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1269
                    goto out;
1270
                }
1271
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1272
                if (keyframe) {
1273
                    distance = 0;
1274
                    if (stss_index + 1 < sc->keyframe_count)
1275
                        stss_index++;
1276
                }
1277
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1278
                if(sc->pseudo_stream_id == -1 ||
1279
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1280
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1281
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1282
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1283
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1284
                            current_offset, current_dts, sample_size, distance, keyframe);
1285
                }
1286
                current_offset += sample_size;
1287
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1288
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1289
                distance++;
1290
                stts_sample++;
1291
                current_sample++;
1292
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1293
                    stts_sample = 0;
1294
                    stts_index++;
1295
                }
1296
            }
1297
        }
1298
    } else { /* read whole chunk */
1299
        unsigned int chunk_samples, chunk_size, chunk_duration;
1300
        unsigned int frames = 1;
1301
        for (i = 0; i < sc->chunk_count; i++) {
1302
            current_offset = sc->chunk_offsets[i];
1303
            if (stsc_index + 1 < sc->stsc_count &&
1304
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1305
                stsc_index++;
1306
            chunk_samples = sc->stsc_data[stsc_index].count;
1307
            /* get chunk size, beware of alaw/ulaw/mace */
1308
            if (sc->samples_per_frame > 0 &&
1309
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1310
                if (sc->samples_per_frame < 160)
1311
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1312
                else {
1313
                    chunk_size = sc->bytes_per_frame;
1314
                    frames = chunk_samples / sc->samples_per_frame;
1315
                    chunk_samples = sc->samples_per_frame;
1316
                }
1317
            } else
1318
                chunk_size = chunk_samples * sc->sample_size;
1319
            for (j = 0; j < frames; j++) {
1320
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1321
                /* get chunk duration */
1322
                chunk_duration = 0;
1323
                while (chunk_samples > 0) {
1324
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1325
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1326
                        sc->stts_data[stts_index].count -= chunk_samples;
1327
                        break;
1328
                    } else {
1329
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1330
                        chunk_samples -= sc->stts_data[stts_index].count;
1331
                        if (stts_index + 1 < sc->stts_count)
1332
                            stts_index++;
1333
                    }
1334
                }
1335
                current_offset += sc->bytes_per_frame;
1336
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1337
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1338
                        chunk_size, chunk_duration);
1339
                assert(chunk_duration % sc->time_rate == 0);
1340
                current_dts += chunk_duration / sc->time_rate;
1341
            }
1342
        }
1343
    }
1344
 out:
1345
    /* adjust sample count to avindex entries */
1346
    sc->sample_count = st->nb_index_entries;
1347
}
1348

    
1349
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1350
{
1351
    AVStream *st;
1352
    MOVStreamContext *sc;
1353
    int ret;
1354

    
1355
    st = av_new_stream(c->fc, c->fc->nb_streams);
1356
    if (!st) return AVERROR(ENOMEM);
1357
    sc = av_mallocz(sizeof(MOVStreamContext));
1358
    if (!sc) return AVERROR(ENOMEM);
1359

    
1360
    st->priv_data = sc;
1361
    st->codec->codec_type = CODEC_TYPE_DATA;
1362
    sc->ffindex = st->index;
1363

    
1364
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1365
        return ret;
1366

    
1367
    /* sanity checks */
1368
    if(sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1369
                           (!sc->sample_size && !sc->sample_count))){
1370
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1371
               st->index);
1372
        sc->sample_count = 0; //ignore track
1373
        return 0;
1374
    }
1375
    if(!sc->time_rate)
1376
        sc->time_rate=1;
1377
    if(!sc->time_scale)
1378
        sc->time_scale= c->time_scale;
1379
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1380

    
1381
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1382
        !st->codec->frame_size && sc->stts_count == 1) {
1383
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1384
                                           st->codec->sample_rate, sc->time_scale);
1385
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1386
    }
1387

    
1388
    if(st->duration != AV_NOPTS_VALUE){
1389
        assert(st->duration % sc->time_rate == 0);
1390
        st->duration /= sc->time_rate;
1391
    }
1392

    
1393
    mov_build_index(c, st);
1394

    
1395
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1396
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1397
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1398
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1399
    } else
1400
        sc->pb = c->fc->pb;
1401

    
1402
    switch (st->codec->codec_id) {
1403
#if CONFIG_H261_DECODER
1404
    case CODEC_ID_H261:
1405
#endif
1406
#if CONFIG_H263_DECODER
1407
    case CODEC_ID_H263:
1408
#endif
1409
#if CONFIG_MPEG4_DECODER
1410
    case CODEC_ID_MPEG4:
1411
#endif
1412
        st->codec->width= 0; /* let decoder init width/height */
1413
        st->codec->height= 0;
1414
        break;
1415
    }
1416

    
1417
    /* Do not need those anymore. */
1418
    av_freep(&sc->chunk_offsets);
1419
    av_freep(&sc->stsc_data);
1420
    av_freep(&sc->sample_sizes);
1421
    av_freep(&sc->keyframes);
1422
    av_freep(&sc->stts_data);
1423

    
1424
    return 0;
1425
}
1426

    
1427
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1428
{
1429
    int ret;
1430
    c->itunes_metadata = 1;
1431
    ret = mov_read_default(c, pb, atom);
1432
    c->itunes_metadata = 0;
1433
    return ret;
1434
}
1435

    
1436
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1437
{
1438
    url_fskip(pb, 4); // version + flags
1439
    atom.size -= 4;
1440
    return mov_read_default(c, pb, atom);
1441
}
1442

    
1443
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1444
{
1445
    char track[16];
1446
    get_be32(pb); // type
1447
    get_be32(pb); // unknown
1448
    snprintf(track, sizeof(track), "%d", get_be32(pb));
1449
    av_metadata_set(&c->fc->metadata, "track", track);
1450
    dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, track);
1451
    return 0;
1452
}
1453

    
1454
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1455
{
1456
    char str[1024], key2[16], language[4] = {0};
1457
    const char *key = NULL;
1458
    uint16_t str_size;
1459

    
1460
    if (c->itunes_metadata) {
1461
        int data_size = get_be32(pb);
1462
        int tag = get_le32(pb);
1463
        if (tag == MKTAG('d','a','t','a')) {
1464
            get_be32(pb); // type
1465
            get_be32(pb); // unknown
1466
            str_size = data_size - 16;
1467
            atom.size -= 16;
1468
        } else return 0;
1469
    } else {
1470
        str_size = get_be16(pb); // string length
1471
        ff_mov_lang_to_iso639(get_be16(pb), language);
1472
        atom.size -= 4;
1473
    }
1474
    switch (atom.type) {
1475
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
1476
    case MKTAG(0xa9,'a','u','t'):
1477
    case MKTAG(0xa9,'A','R','T'):
1478
    case MKTAG(0xa9,'w','r','t'): key = "author";    break;
1479
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
1480
    case MKTAG(0xa9,'c','m','t'):
1481
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
1482
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
1483
    case MKTAG(0xa9,'d','a','y'): key = "year";      break;
1484
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
1485
    case MKTAG(0xa9,'t','o','o'):
1486
    case MKTAG(0xa9,'e','n','c'): key = "muxer";     break;
1487
    }
1488
    if (!key)
1489
        return 0;
1490
    if (atom.size < 0)
1491
        return -1;
1492

    
1493
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
1494
    get_buffer(pb, str, str_size);
1495
    str[str_size] = 0;
1496
    av_metadata_set(&c->fc->metadata, key, str);
1497
    if (*language && strcmp(language, "und")) {
1498
        snprintf(key2, sizeof(key2), "%s-%s", key, language);
1499
        av_metadata_set(&c->fc->metadata, key2, str);
1500
    }
1501
    dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);
1502
    return 0;
1503
}
1504

    
1505
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1506
{
1507
    int i;
1508
    int width;
1509
    int height;
1510
    int64_t disp_transform[2];
1511
    int display_matrix[3][2];
1512
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1513
    MOVStreamContext *sc = st->priv_data;
1514
    int version = get_byte(pb);
1515

    
1516
    get_be24(pb); /* flags */
1517
    /*
1518
    MOV_TRACK_ENABLED 0x0001
1519
    MOV_TRACK_IN_MOVIE 0x0002
1520
    MOV_TRACK_IN_PREVIEW 0x0004
1521
    MOV_TRACK_IN_POSTER 0x0008
1522
    */
1523

    
1524
    if (version == 1) {
1525
        get_be64(pb);
1526
        get_be64(pb);
1527
    } else {
1528
        get_be32(pb); /* creation time */
1529
        get_be32(pb); /* modification time */
1530
    }
1531
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1532
    get_be32(pb); /* reserved */
1533

    
1534
    /* highlevel (considering edits) duration in movie timebase */
1535
    (version == 1) ? get_be64(pb) : get_be32(pb);
1536
    get_be32(pb); /* reserved */
1537
    get_be32(pb); /* reserved */
1538

    
1539
    get_be16(pb); /* layer */
1540
    get_be16(pb); /* alternate group */
1541
    get_be16(pb); /* volume */
1542
    get_be16(pb); /* reserved */
1543

    
1544
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1545
    // they're kept in fixed point format through all calculations
1546
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1547
    for (i = 0; i < 3; i++) {
1548
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1549
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1550
        get_be32(pb);           // 2.30 fixed point (not used)
1551
    }
1552

    
1553
    width = get_be32(pb);       // 16.16 fixed point track width
1554
    height = get_be32(pb);      // 16.16 fixed point track height
1555
    sc->width = width >> 16;
1556
    sc->height = height >> 16;
1557

    
1558
    //transform the display width/height according to the matrix
1559
    // skip this if the display matrix is the default identity matrix
1560
    // to keep the same scale, use [width height 1<<16]
1561
    if (width && height &&
1562
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1563
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1564
        display_matrix[2][0]           || display_matrix[2][1])) {
1565
        for (i = 0; i < 2; i++)
1566
            disp_transform[i] =
1567
                (int64_t)  width  * display_matrix[0][i] +
1568
                (int64_t)  height * display_matrix[1][i] +
1569
                ((int64_t) display_matrix[2][i] << 16);
1570

    
1571
        //sample aspect ratio is new width/height divided by old width/height
1572
        st->sample_aspect_ratio = av_d2q(
1573
            ((double) disp_transform[0] * height) /
1574
            ((double) disp_transform[1] * width), INT_MAX);
1575
    }
1576
    return 0;
1577
}
1578

    
1579
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1580
{
1581
    MOVFragment *frag = &c->fragment;
1582
    MOVTrackExt *trex = NULL;
1583
    int flags, track_id, i;
1584

    
1585
    get_byte(pb); /* version */
1586
    flags = get_be24(pb);
1587

    
1588
    track_id = get_be32(pb);
1589
    if (!track_id || track_id > c->fc->nb_streams)
1590
        return -1;
1591
    frag->track_id = track_id;
1592
    for (i = 0; i < c->trex_count; i++)
1593
        if (c->trex_data[i].track_id == frag->track_id) {
1594
            trex = &c->trex_data[i];
1595
            break;
1596
        }
1597
    if (!trex) {
1598
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1599
        return -1;
1600
    }
1601

    
1602
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1603
    else              frag->base_data_offset = frag->moof_offset;
1604
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1605
    else              frag->stsd_id          = trex->stsd_id;
1606

    
1607
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1608
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1609
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1610
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1611
    return 0;
1612
}
1613

    
1614
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1615
{
1616
    MOVTrackExt *trex;
1617

    
1618
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1619
        return -1;
1620
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1621
    if (!trex)
1622
        return AVERROR(ENOMEM);
1623
    c->trex_data = trex;
1624
    trex = &c->trex_data[c->trex_count++];
1625
    get_byte(pb); /* version */
1626
    get_be24(pb); /* flags */
1627
    trex->track_id = get_be32(pb);
1628
    trex->stsd_id  = get_be32(pb);
1629
    trex->duration = get_be32(pb);
1630
    trex->size     = get_be32(pb);
1631
    trex->flags    = get_be32(pb);
1632
    return 0;
1633
}
1634

    
1635
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1636
{
1637
    MOVFragment *frag = &c->fragment;
1638
    AVStream *st;
1639
    MOVStreamContext *sc;
1640
    uint64_t offset;
1641
    int64_t dts;
1642
    int data_offset = 0;
1643
    unsigned entries, first_sample_flags = frag->flags;
1644
    int flags, distance, i;
1645

    
1646
    if (!frag->track_id || frag->track_id > c->fc->nb_streams)
1647
        return -1;
1648
    st = c->fc->streams[frag->track_id-1];
1649
    sc = st->priv_data;
1650
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1651
        return 0;
1652
    get_byte(pb); /* version */
1653
    flags = get_be24(pb);
1654
    entries = get_be32(pb);
1655
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1656
    if (flags & 0x001) data_offset        = get_be32(pb);
1657
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1658
    if (flags & 0x800) {
1659
        MOVStts *ctts_data;
1660
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1661
            return -1;
1662
        ctts_data = av_realloc(sc->ctts_data,
1663
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1664
        if (!ctts_data)
1665
            return AVERROR(ENOMEM);
1666
        sc->ctts_data = ctts_data;
1667
    }
1668
    dts = st->duration;
1669
    offset = frag->base_data_offset + data_offset;
1670
    distance = 0;
1671
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1672
    for (i = 0; i < entries; i++) {
1673
        unsigned sample_size = frag->size;
1674
        int sample_flags = i ? frag->flags : first_sample_flags;
1675
        unsigned sample_duration = frag->duration;
1676
        int keyframe;
1677

    
1678
        if (flags & 0x100) sample_duration = get_be32(pb);
1679
        if (flags & 0x200) sample_size     = get_be32(pb);
1680
        if (flags & 0x400) sample_flags    = get_be32(pb);
1681
        if (flags & 0x800) {
1682
            sc->ctts_data[sc->ctts_count].count = 1;
1683
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1684
            sc->ctts_count++;
1685
        }
1686
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1687
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1688
            distance = 0;
1689
        av_add_index_entry(st, offset, dts, sample_size, distance,
1690
                           keyframe ? AVINDEX_KEYFRAME : 0);
1691
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1692
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1693
                offset, dts, sample_size, distance, keyframe);
1694
        distance++;
1695
        assert(sample_duration % sc->time_rate == 0);
1696
        dts += sample_duration / sc->time_rate;
1697
        offset += sample_size;
1698
    }
1699
    frag->moof_offset = offset;
1700
    sc->sample_count = st->nb_index_entries;
1701
    st->duration = dts;
1702
    return 0;
1703
}
1704

    
1705
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1706
/* like the files created with Adobe Premiere 5.0, for samples see */
1707
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1708
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1709
{
1710
    int err;
1711

    
1712
    if (atom.size < 8)
1713
        return 0; /* continue */
1714
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1715
        url_fskip(pb, atom.size - 4);
1716
        return 0;
1717
    }
1718
    atom.type = get_le32(pb);
1719
    atom.offset += 8;
1720
    atom.size -= 8;
1721
    if (atom.type != MKTAG('m','d','a','t')) {
1722
        url_fskip(pb, atom.size);
1723
        return 0;
1724
    }
1725
    err = mov_read_mdat(c, pb, atom);
1726
    return err;
1727
}
1728

    
1729
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1730
{
1731
#if CONFIG_ZLIB
1732
    ByteIOContext ctx;
1733
    uint8_t *cmov_data;
1734
    uint8_t *moov_data; /* uncompressed data */
1735
    long cmov_len, moov_len;
1736
    int ret = -1;
1737

    
1738
    get_be32(pb); /* dcom atom */
1739
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1740
        return -1;
1741
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1742
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1743
        return -1;
1744
    }
1745
    get_be32(pb); /* cmvd atom */
1746
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1747
        return -1;
1748
    moov_len = get_be32(pb); /* uncompressed size */
1749
    cmov_len = atom.size - 6 * 4;
1750

    
1751
    cmov_data = av_malloc(cmov_len);
1752
    if (!cmov_data)
1753
        return AVERROR(ENOMEM);
1754
    moov_data = av_malloc(moov_len);
1755
    if (!moov_data) {
1756
        av_free(cmov_data);
1757
        return AVERROR(ENOMEM);
1758
    }
1759
    get_buffer(pb, cmov_data, cmov_len);
1760
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1761
        goto free_and_return;
1762
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1763
        goto free_and_return;
1764
    atom.type = MKTAG('m','o','o','v');
1765
    atom.offset = 0;
1766
    atom.size = moov_len;
1767
#ifdef DEBUG
1768
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1769
#endif
1770
    ret = mov_read_default(c, &ctx, atom);
1771
free_and_return:
1772
    av_free(moov_data);
1773
    av_free(cmov_data);
1774
    return ret;
1775
#else
1776
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1777
    return -1;
1778
#endif
1779
}
1780

    
1781
/* edit list atom */
1782
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1783
{
1784
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1785
    int i, edit_count;
1786

    
1787
    get_byte(pb); /* version */
1788
    get_be24(pb); /* flags */
1789
    edit_count = get_be32(pb); /* entries */
1790

    
1791
    for(i=0; i<edit_count; i++){
1792
        int time;
1793
        get_be32(pb); /* Track duration */
1794
        time = get_be32(pb); /* Media time */
1795
        get_be32(pb); /* Media rate */
1796
        if (i == 0 && time != -1) {
1797
            sc->time_offset = time;
1798
            sc->time_rate = av_gcd(sc->time_rate, time);
1799
        }
1800
    }
1801

    
1802
    if(edit_count > 1)
1803
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1804
               "a/v desync might occur, patch welcome\n");
1805

    
1806
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1807
    return 0;
1808
}
1809

    
1810
static const MOVParseTableEntry mov_default_parse_table[] = {
1811
{ MKTAG('a','v','s','s'), mov_read_extradata },
1812
{ MKTAG('c','o','6','4'), mov_read_stco },
1813
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1814
{ MKTAG('d','i','n','f'), mov_read_default },
1815
{ MKTAG('d','r','e','f'), mov_read_dref },
1816
{ MKTAG('e','d','t','s'), mov_read_default },
1817
{ MKTAG('e','l','s','t'), mov_read_elst },
1818
{ MKTAG('e','n','d','a'), mov_read_enda },
1819
{ MKTAG('f','i','e','l'), mov_read_extradata },
1820
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1821
{ MKTAG('g','l','b','l'), mov_read_glbl },
1822
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1823
{ MKTAG('i','l','s','t'), mov_read_ilst },
1824
{ MKTAG('j','p','2','h'), mov_read_extradata },
1825
{ MKTAG('m','d','a','t'), mov_read_mdat },
1826
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1827
{ MKTAG('m','d','i','a'), mov_read_default },
1828
{ MKTAG('m','e','t','a'), mov_read_meta },
1829
{ MKTAG('m','i','n','f'), mov_read_default },
1830
{ MKTAG('m','o','o','f'), mov_read_moof },
1831
{ MKTAG('m','o','o','v'), mov_read_moov },
1832
{ MKTAG('m','v','e','x'), mov_read_default },
1833
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1834
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1835
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1836
{ MKTAG('a','v','c','C'), mov_read_glbl },
1837
{ MKTAG('p','a','s','p'), mov_read_pasp },
1838
{ MKTAG('s','t','b','l'), mov_read_default },
1839
{ MKTAG('s','t','c','o'), mov_read_stco },
1840
{ MKTAG('s','t','s','c'), mov_read_stsc },
1841
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1842
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1843
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1844
{ MKTAG('s','t','t','s'), mov_read_stts },
1845
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1846
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1847
{ MKTAG('t','r','a','k'), mov_read_trak },
1848
{ MKTAG('t','r','a','f'), mov_read_default },
1849
{ MKTAG('t','r','e','x'), mov_read_trex },
1850
{ MKTAG('t','r','k','n'), mov_read_trkn },
1851
{ MKTAG('t','r','u','n'), mov_read_trun },
1852
{ MKTAG('u','d','t','a'), mov_read_default },
1853
{ MKTAG('w','a','v','e'), mov_read_wave },
1854
{ MKTAG('e','s','d','s'), mov_read_esds },
1855
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1856
{ MKTAG('c','m','o','v'), mov_read_cmov },
1857
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1858
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1859
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1860
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1861
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1862
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1863
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1864
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1865
{ MKTAG(0xa9,'a','u','t'), mov_read_udta_string },
1866
{ MKTAG(0xa9,'d','a','y'), mov_read_udta_string },
1867
{ MKTAG(0xa9,'g','e','n'), mov_read_udta_string },
1868
{ MKTAG(0xa9,'e','n','c'), mov_read_udta_string },
1869
{ MKTAG(0xa9,'t','o','o'), mov_read_udta_string },
1870
{ 0, NULL }
1871
};
1872

    
1873
static int mov_probe(AVProbeData *p)
1874
{
1875
    unsigned int offset;
1876
    uint32_t tag;
1877
    int score = 0;
1878

    
1879
    /* check file header */
1880
    offset = 0;
1881
    for(;;) {
1882
        /* ignore invalid offset */
1883
        if ((offset + 8) > (unsigned int)p->buf_size)
1884
            return score;
1885
        tag = AV_RL32(p->buf + offset + 4);
1886
        switch(tag) {
1887
        /* check for obvious tags */
1888
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1889
        case MKTAG('m','o','o','v'):
1890
        case MKTAG('m','d','a','t'):
1891
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1892
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1893
        case MKTAG('f','t','y','p'):
1894
            return AVPROBE_SCORE_MAX;
1895
        /* those are more common words, so rate then a bit less */
1896
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1897
        case MKTAG('w','i','d','e'):
1898
        case MKTAG('f','r','e','e'):
1899
        case MKTAG('j','u','n','k'):
1900
        case MKTAG('p','i','c','t'):
1901
            return AVPROBE_SCORE_MAX - 5;
1902
        case MKTAG(0x82,0x82,0x7f,0x7d):
1903
        case MKTAG('s','k','i','p'):
1904
        case MKTAG('u','u','i','d'):
1905
        case MKTAG('p','r','f','l'):
1906
            offset = AV_RB32(p->buf+offset) + offset;
1907
            /* if we only find those cause probedata is too small at least rate them */
1908
            score = AVPROBE_SCORE_MAX - 50;
1909
            break;
1910
        default:
1911
            /* unrecognized tag */
1912
            return score;
1913
        }
1914
    }
1915
    return score;
1916
}
1917

    
1918
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1919
{
1920
    MOVContext *mov = s->priv_data;
1921
    ByteIOContext *pb = s->pb;
1922
    int err;
1923
    MOVAtom atom = { 0, 0, 0 };
1924

    
1925
    mov->fc = s;
1926
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1927
    if(!url_is_streamed(pb))
1928
        atom.size = url_fsize(pb);
1929
    else
1930
        atom.size = INT64_MAX;
1931

    
1932
    /* check MOV header */
1933
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1934
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1935
        return err;
1936
    }
1937
    if (!mov->found_moov) {
1938
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1939
        return -1;
1940
    }
1941
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1942

    
1943
    return 0;
1944
}
1945

    
1946
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1947
{
1948
    MOVContext *mov = s->priv_data;
1949
    MOVStreamContext *sc = 0;
1950
    AVIndexEntry *sample = 0;
1951
    int64_t best_dts = INT64_MAX;
1952
    int i, ret;
1953
 retry:
1954
    for (i = 0; i < s->nb_streams; i++) {
1955
        AVStream *st = s->streams[i];
1956
        MOVStreamContext *msc = st->priv_data;
1957
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1958
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1959
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1960
                                     AV_TIME_BASE, msc->time_scale);
1961
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1962
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1963
                (!url_is_streamed(s->pb) &&
1964
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1965
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1966
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1967
                sample = current_sample;
1968
                best_dts = dts;
1969
                sc = msc;
1970
            }
1971
        }
1972
    }
1973
    if (!sample) {
1974
        mov->found_mdat = 0;
1975
        if (!url_is_streamed(s->pb) ||
1976
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1977
            url_feof(s->pb))
1978
            return -1;
1979
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1980
        goto retry;
1981
    }
1982
    /* must be done just before reading, to avoid infinite loop on sample */
1983
    sc->current_sample++;
1984
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1985
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1986
               sc->ffindex, sample->pos);
1987
        return -1;
1988
    }
1989
    ret = av_get_packet(sc->pb, pkt, sample->size);
1990
    if (ret < 0)
1991
        return ret;
1992
#if CONFIG_DV_DEMUXER
1993
    if (mov->dv_demux && sc->dv_audio_container) {
1994
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1995
        av_free(pkt->data);
1996
        pkt->size = 0;
1997
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1998
            return -1;
1999
    }
2000
#endif
2001
    pkt->stream_index = sc->ffindex;
2002
    pkt->dts = sample->timestamp;
2003
    if (sc->ctts_data) {
2004
        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
2005
        pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
2006
        /* update ctts context */
2007
        sc->ctts_sample++;
2008
        if (sc->ctts_index < sc->ctts_count &&
2009
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2010
            sc->ctts_index++;
2011
            sc->ctts_sample = 0;
2012
        }
2013
        if (sc->wrong_dts)
2014
            pkt->dts = AV_NOPTS_VALUE;
2015
    } else {
2016
        AVStream *st = s->streams[sc->ffindex];
2017
        int64_t next_dts = (sc->current_sample < sc->sample_count) ?
2018
            st->index_entries[sc->current_sample].timestamp : st->duration;
2019
        pkt->duration = next_dts - pkt->dts;
2020
        pkt->pts = pkt->dts;
2021
    }
2022
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
2023
    pkt->pos = sample->pos;
2024
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2025
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2026
    return 0;
2027
}
2028

    
2029
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
2030
{
2031
    MOVStreamContext *sc = st->priv_data;
2032
    int sample, time_sample;
2033
    int i;
2034

    
2035
    sample = av_index_search_timestamp(st, timestamp, flags);
2036
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2037
    if (sample < 0) /* not sure what to do */
2038
        return -1;
2039
    sc->current_sample = sample;
2040
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
2041
    /* adjust ctts index */
2042
    if (sc->ctts_data) {
2043
        time_sample = 0;
2044
        for (i = 0; i < sc->ctts_count; i++) {
2045
            int next = time_sample + sc->ctts_data[i].count;
2046
            if (next > sc->current_sample) {
2047
                sc->ctts_index = i;
2048
                sc->ctts_sample = sc->current_sample - time_sample;
2049
                break;
2050
            }
2051
            time_sample = next;
2052
        }
2053
    }
2054
    return sample;
2055
}
2056

    
2057
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2058
{
2059
    AVStream *st;
2060
    int64_t seek_timestamp, timestamp;
2061
    int sample;
2062
    int i;
2063

    
2064
    if (stream_index >= s->nb_streams)
2065
        return -1;
2066
    if (sample_time < 0)
2067
        sample_time = 0;
2068

    
2069
    st = s->streams[stream_index];
2070
    sample = mov_seek_stream(st, sample_time, flags);
2071
    if (sample < 0)
2072
        return -1;
2073

    
2074
    /* adjust seek timestamp to found sample timestamp */
2075
    seek_timestamp = st->index_entries[sample].timestamp;
2076

    
2077
    for (i = 0; i < s->nb_streams; i++) {
2078
        st = s->streams[i];
2079
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2080
            continue;
2081

    
2082
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2083
        mov_seek_stream(st, timestamp, flags);
2084
    }
2085
    return 0;
2086
}
2087

    
2088
static int mov_read_close(AVFormatContext *s)
2089
{
2090
    int i, j;
2091
    MOVContext *mov = s->priv_data;
2092
    for(i=0; i<s->nb_streams; i++) {
2093
        MOVStreamContext *sc = s->streams[i]->priv_data;
2094
        av_freep(&sc->ctts_data);
2095
        for (j=0; j<sc->drefs_count; j++)
2096
            av_freep(&sc->drefs[j].path);
2097
        av_freep(&sc->drefs);
2098
        if (sc->pb && sc->pb != s->pb)
2099
            url_fclose(sc->pb);
2100
    }
2101
    if(mov->dv_demux){
2102
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
2103
            av_freep(&mov->dv_fctx->streams[i]->codec);
2104
            av_freep(&mov->dv_fctx->streams[i]);
2105
        }
2106
        av_freep(&mov->dv_fctx);
2107
        av_freep(&mov->dv_demux);
2108
    }
2109
    av_freep(&mov->trex_data);
2110
    return 0;
2111
}
2112

    
2113
AVInputFormat mov_demuxer = {
2114
    "mov,mp4,m4a,3gp,3g2,mj2",
2115
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2116
    sizeof(MOVContext),
2117
    mov_probe,
2118
    mov_read_header,
2119
    mov_read_packet,
2120
    mov_read_close,
2121
    mov_read_seek,
2122
};