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ffmpeg / libavformat / mov.c @ d3bc61ac

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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
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 * 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 "avformat.h"
27
#include "riff.h"
28
#include "isom.h"
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#include "dv.h"
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31
#ifdef CONFIG_ZLIB
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#include <zlib.h>
33
#endif
34

    
35
/*
36
 * First version by Francois Revol revol@free.fr
37
 * Seek function by Gael Chardon gael.dev@4now.net
38
 *
39
 * Features and limitations:
40
 * - reads most of the QT files I have (at least the structure),
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 *   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 :-)
43
 *
44
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
46
 *
47
 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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 * Apple:
50
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
51
 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
52
 * QuickTime is a trademark of Apple (AFAIK :))
53
 */
54

    
55
#include "qtpalette.h"
56

    
57

    
58
#undef NDEBUG
59
#include <assert.h>
60

    
61
/* the QuickTime file format is quite convoluted...
62
 * it has lots of index tables, each indexing something in another one...
63
 * Here we just use what is needed to read the chunks
64
 */
65

    
66
typedef struct {
67
    int first;
68
    int count;
69
    int id;
70
} MOV_stsc_t;
71

    
72
typedef struct {
73
    uint32_t type;
74
    char *path;
75
} MOV_dref_t;
76

    
77
typedef struct {
78
    uint32_t type;
79
    int64_t offset;
80
    int64_t size; /* total size (excluding the size and type fields) */
81
} MOV_atom_t;
82

    
83
struct MOVParseTableEntry;
84

    
85
typedef struct {
86
    unsigned track_id;
87
    uint64_t base_data_offset;
88
    uint64_t moof_offset;
89
    unsigned stsd_id;
90
    unsigned duration;
91
    unsigned size;
92
    unsigned flags;
93
} MOVFragment;
94

    
95
typedef struct {
96
    unsigned track_id;
97
    unsigned stsd_id;
98
    unsigned duration;
99
    unsigned size;
100
    unsigned flags;
101
} MOVTrackExt;
102

    
103
typedef struct MOVStreamContext {
104
    ByteIOContext *pb;
105
    int ffindex; /* the ffmpeg stream id */
106
    int next_chunk;
107
    unsigned int chunk_count;
108
    int64_t *chunk_offsets;
109
    unsigned int stts_count;
110
    MOV_stts_t *stts_data;
111
    unsigned int ctts_count;
112
    MOV_stts_t *ctts_data;
113
    unsigned int edit_count; /* number of 'edit' (elst atom) */
114
    unsigned int sample_to_chunk_sz;
115
    MOV_stsc_t *sample_to_chunk;
116
    int sample_to_ctime_index;
117
    int sample_to_ctime_sample;
118
    unsigned int sample_size;
119
    unsigned int sample_count;
120
    int *sample_sizes;
121
    unsigned int keyframe_count;
122
    int *keyframes;
123
    int time_scale;
124
    int time_rate;
125
    int current_sample;
126
    unsigned int bytes_per_frame;
127
    unsigned int samples_per_frame;
128
    int dv_audio_container;
129
    int pseudo_stream_id;
130
    int16_t audio_cid; ///< stsd audio compression id
131
    unsigned drefs_count;
132
    MOV_dref_t *drefs;
133
    int dref_id;
134
} MOVStreamContext;
135

    
136
typedef struct MOVContext {
137
    AVFormatContext *fc;
138
    int time_scale;
139
    int64_t duration; /* duration of the longest track */
140
    int found_moov; /* when both 'moov' and 'mdat' sections has been found */
141
    int found_mdat; /* we suppose we have enough data to read the file */
142
    AVPaletteControl palette_control;
143
    DVDemuxContext *dv_demux;
144
    AVFormatContext *dv_fctx;
145
    int isom; /* 1 if file is ISO Media (mp4/3gp) */
146
    MOVFragment fragment; ///< current fragment in moof atom
147
    MOVTrackExt *trex_data;
148
    unsigned trex_count;
149
} MOVContext;
150

    
151

    
152
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
153

    
154
/* those functions parse an atom */
155
/* return code:
156
  1: found what I wanted, exit
157
  0: continue to parse next atom
158
 <0: error occurred, exit
159
*/
160
/* links atom IDs to parse functions */
161
typedef struct MOVParseTableEntry {
162
    uint32_t type;
163
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
164
} MOVParseTableEntry;
165

    
166
static const MOVParseTableEntry mov_default_parse_table[];
167

    
168
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
169
{
170
    int64_t total_size = 0;
171
    MOV_atom_t a;
172
    int i;
173
    int err = 0;
174

    
175
    a.offset = atom.offset;
176

    
177
    if (atom.size < 0)
178
        atom.size = INT64_MAX;
179
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
180
        a.size = atom.size;
181
        a.type=0;
182
        if(atom.size >= 8) {
183
            a.size = get_be32(pb);
184
            a.type = get_le32(pb);
185
        }
186
        total_size += 8;
187
        a.offset += 8;
188
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
189
                a.type, (char*)&a.type, a.size, atom.size, total_size);
190
        if (a.size == 1) { /* 64 bit extended size */
191
            a.size = get_be64(pb) - 8;
192
            a.offset += 8;
193
            total_size += 8;
194
        }
195
        if (a.size == 0) {
196
            a.size = atom.size - total_size;
197
            if (a.size <= 8)
198
                break;
199
        }
200
        a.size -= 8;
201
        if(a.size < 0)
202
            break;
203
        a.size = FFMIN(a.size, atom.size - total_size);
204

    
205
        for (i = 0; mov_default_parse_table[i].type != 0
206
             && mov_default_parse_table[i].type != a.type; i++)
207
            /* empty */;
208

    
209
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
210
            url_fskip(pb, a.size);
211
        } else {
212
            offset_t start_pos = url_ftell(pb);
213
            int64_t left;
214
            err = mov_default_parse_table[i].parse(c, pb, a);
215
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
216
                break;
217
            left = a.size - url_ftell(pb) + start_pos;
218
            if (left > 0) /* skip garbage at atom end */
219
                url_fskip(pb, left);
220
        }
221

    
222
        a.offset += a.size;
223
        total_size += a.size;
224
    }
225

    
226
    if (!err && total_size < atom.size && atom.size < 0x7ffff) {
227
        url_fskip(pb, atom.size - total_size);
228
    }
229

    
230
    return err;
231
}
232

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

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

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

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

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

    
261
            url_fskip(pb, 10);
262

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

    
269
            url_fskip(pb, 112);
270

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

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

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

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

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

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

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

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

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

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

    
366
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
367
{
368
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
369
    int tag, len;
370

    
371
    get_be32(pb); /* version + flags */
372
    len = mp4_read_descr(c, pb, &tag);
373
    if (tag == MP4ESDescrTag) {
374
        get_be16(pb); /* ID */
375
        get_byte(pb); /* priority */
376
    } else
377
        get_be16(pb); /* ID */
378

    
379
    len = mp4_read_descr(c, pb, &tag);
380
    if (tag == MP4DecConfigDescrTag) {
381
        int object_type_id = get_byte(pb);
382
        get_byte(pb); /* stream type */
383
        get_be24(pb); /* buffer size db */
384
        get_be32(pb); /* max bitrate */
385
        get_be32(pb); /* avg bitrate */
386

    
387
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
388
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
389
        len = mp4_read_descr(c, pb, &tag);
390
        if (tag == MP4DecSpecificDescrTag) {
391
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
392
            if((uint64_t)len > (1<<30))
393
                return -1;
394
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
395
            if (!st->codec->extradata)
396
                return AVERROR(ENOMEM);
397
            get_buffer(pb, st->codec->extradata, len);
398
            st->codec->extradata_size = len;
399
            /* from mplayer */
400
            if ((*st->codec->extradata >> 3) == 29) {
401
                st->codec->codec_id = CODEC_ID_MP3ON4;
402
            }
403
        }
404
    }
405
    return 0;
406
}
407

    
408
/* this atom contains actual media data */
409
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
410
{
411
    if(atom.size == 0) /* wrong one (MP4) */
412
        return 0;
413
    c->found_mdat=1;
414
    return 0; /* now go for moov */
415
}
416

    
417
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
418
{
419
    uint32_t type = get_le32(pb);
420

    
421
    if (type != MKTAG('q','t',' ',' '))
422
        c->isom = 1;
423
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
424
    get_be32(pb); /* minor version */
425
    url_fskip(pb, atom.size - 8);
426
    return 0;
427
}
428

    
429
/* this atom should contain all header atoms */
430
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
431
{
432
    if (mov_read_default(c, pb, atom) < 0)
433
        return -1;
434
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
435
    /* so we don't parse the whole file if over a network */
436
    c->found_moov=1;
437
    return 0; /* now go for mdat */
438
}
439

    
440
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
441
{
442
    c->fragment.moof_offset = url_ftell(pb) - 8;
443
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
444
    return mov_read_default(c, pb, atom);
445
}
446

    
447
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
448
{
449
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
450
    MOVStreamContext *sc = st->priv_data;
451
    int version = get_byte(pb);
452
    int lang;
453

    
454
    if (version > 1)
455
        return 1; /* unsupported */
456

    
457
    get_be24(pb); /* flags */
458
    if (version == 1) {
459
        get_be64(pb);
460
        get_be64(pb);
461
    } else {
462
        get_be32(pb); /* creation time */
463
        get_be32(pb); /* modification time */
464
    }
465

    
466
    sc->time_scale = get_be32(pb);
467
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
468

    
469
    lang = get_be16(pb); /* language */
470
    ff_mov_lang_to_iso639(lang, st->language);
471
    get_be16(pb); /* quality */
472

    
473
    return 0;
474
}
475

    
476
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
477
{
478
    int version = get_byte(pb); /* version */
479
    get_be24(pb); /* flags */
480

    
481
    if (version == 1) {
482
        get_be64(pb);
483
        get_be64(pb);
484
    } else {
485
        get_be32(pb); /* creation time */
486
        get_be32(pb); /* modification time */
487
    }
488
    c->time_scale = get_be32(pb); /* time scale */
489

    
490
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
491

    
492
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
493
    get_be32(pb); /* preferred scale */
494

    
495
    get_be16(pb); /* preferred volume */
496

    
497
    url_fskip(pb, 10); /* reserved */
498

    
499
    url_fskip(pb, 36); /* display matrix */
500

    
501
    get_be32(pb); /* preview time */
502
    get_be32(pb); /* preview duration */
503
    get_be32(pb); /* poster time */
504
    get_be32(pb); /* selection time */
505
    get_be32(pb); /* selection duration */
506
    get_be32(pb); /* current time */
507
    get_be32(pb); /* next track ID */
508

    
509
    return 0;
510
}
511

    
512
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
513
{
514
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
515

    
516
    if((uint64_t)atom.size > (1<<30))
517
        return -1;
518

    
519
    // currently SVQ3 decoder expect full STSD header - so let's fake it
520
    // this should be fixed and just SMI header should be passed
521
    av_free(st->codec->extradata);
522
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
523
    if (!st->codec->extradata)
524
        return AVERROR(ENOMEM);
525
    st->codec->extradata_size = 0x5a + atom.size;
526
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
527
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
528
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
529
    return 0;
530
}
531

    
532
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
533
{
534
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
535
    int little_endian = get_be16(pb);
536

    
537
    if (little_endian) {
538
        switch (st->codec->codec_id) {
539
        case CODEC_ID_PCM_S24BE:
540
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
541
            break;
542
        case CODEC_ID_PCM_S32BE:
543
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
544
            break;
545
        default:
546
            break;
547
        }
548
    }
549
    return 0;
550
}
551

    
552
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
553
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
554
{
555
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
556
    uint64_t size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
557
    uint8_t *buf;
558
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
559
        return -1;
560
    buf= av_realloc(st->codec->extradata, size);
561
    if(!buf)
562
        return -1;
563
    st->codec->extradata= buf;
564
    buf+= st->codec->extradata_size;
565
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
566
    AV_WB32(       buf    , atom.size + 8);
567
    AV_WL32(       buf + 4, atom.type);
568
    get_buffer(pb, buf + 8, atom.size);
569
    return 0;
570
}
571

    
572
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
573
{
574
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
575

    
576
    if((uint64_t)atom.size > (1<<30))
577
        return -1;
578

    
579
    if (st->codec->codec_id == CODEC_ID_QDM2) {
580
        // pass all frma atom to codec, needed at least for QDM2
581
        av_free(st->codec->extradata);
582
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
583
        if (!st->codec->extradata)
584
            return AVERROR(ENOMEM);
585
        st->codec->extradata_size = atom.size;
586
        get_buffer(pb, st->codec->extradata, atom.size);
587
    } else if (atom.size > 8) { /* to read frma, esds atoms */
588
        if (mov_read_default(c, pb, atom) < 0)
589
            return -1;
590
    } else
591
        url_fskip(pb, atom.size);
592
    return 0;
593
}
594

    
595
/**
596
 * This function reads atom content and puts data in extradata without tag
597
 * nor size unlike mov_read_extradata.
598
 */
599
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
600
{
601
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
602

    
603
    if((uint64_t)atom.size > (1<<30))
604
        return -1;
605

    
606
    av_free(st->codec->extradata);
607
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
608
    if (!st->codec->extradata)
609
        return AVERROR(ENOMEM);
610
    st->codec->extradata_size = atom.size;
611
    get_buffer(pb, st->codec->extradata, atom.size);
612
    return 0;
613
}
614

    
615
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
616
{
617
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
618
    MOVStreamContext *sc = st->priv_data;
619
    unsigned int i, entries;
620

    
621
    get_byte(pb); /* version */
622
    get_be24(pb); /* flags */
623

    
624
    entries = get_be32(pb);
625

    
626
    if(entries >= UINT_MAX/sizeof(int64_t))
627
        return -1;
628

    
629
    sc->chunk_count = entries;
630
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
631
    if (!sc->chunk_offsets)
632
        return -1;
633
    if (atom.type == MKTAG('s', 't', 'c', 'o')) {
634
        for(i=0; i<entries; i++) {
635
            sc->chunk_offsets[i] = get_be32(pb);
636
        }
637
    } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
638
        for(i=0; i<entries; i++) {
639
            sc->chunk_offsets[i] = get_be64(pb);
640
        }
641
    } else
642
        return -1;
643

    
644
    return 0;
645
}
646

    
647
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
648
{
649
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
650
    MOVStreamContext *sc = st->priv_data;
651
    int entries, frames_per_sample;
652
    uint32_t format;
653
    uint8_t codec_name[32];
654

    
655
    /* for palette traversal */
656
    unsigned int color_depth;
657
    unsigned int color_start;
658
    unsigned int color_count;
659
    unsigned int color_end;
660
    int color_index;
661
    int color_dec;
662
    int color_greyscale;
663
    const uint8_t *color_table;
664
    int j, pseudo_stream_id;
665
    unsigned char r, g, b;
666

    
667
    get_byte(pb); /* version */
668
    get_be24(pb); /* flags */
669

    
670
    entries = get_be32(pb);
671

    
672
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
673
        //Parsing Sample description table
674
        enum CodecID id;
675
        int dref_id;
676
        MOV_atom_t a = { 0, 0, 0 };
677
        offset_t start_pos = url_ftell(pb);
678
        int size = get_be32(pb); /* size */
679
        format = get_le32(pb); /* data format */
680

    
681
        get_be32(pb); /* reserved */
682
        get_be16(pb); /* reserved */
683
        dref_id = get_be16(pb);
684

    
685
        if (st->codec->codec_tag &&
686
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
687
                                   : st->codec->codec_tag != MKTAG('j', 'p', 'e', 'g'))
688
           ){
689
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
690
             * export it as a separate AVStream but this needs a few changes
691
             * in the MOV demuxer, patch welcome. */
692
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
693
            continue;
694
        }
695
        sc->pseudo_stream_id= pseudo_stream_id;
696
        sc->dref_id= dref_id;
697

    
698
        st->codec->codec_tag = format;
699
        id = codec_get_id(codec_movaudio_tags, format);
700
        if (id<=0 && (format&0xFFFF) == 'm' + ('s'<<8))
701
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
702

    
703
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
704
            st->codec->codec_type = CODEC_TYPE_AUDIO;
705
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
706
                   format && format != MKTAG('m', 'p', '4', 's')) { /* skip old asf mpeg4 tag */
707
            id = codec_get_id(codec_movvideo_tags, format);
708
            if (id <= 0)
709
                id = codec_get_id(codec_bmp_tags, format);
710
            if (id > 0)
711
                st->codec->codec_type = CODEC_TYPE_VIDEO;
712
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
713
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
714
                if(id > 0)
715
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
716
            }
717
        }
718

    
719
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
720
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
721
                (format >> 24) & 0xff, st->codec->codec_type);
722

    
723
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
724
            st->codec->codec_id = id;
725
            get_be16(pb); /* version */
726
            get_be16(pb); /* revision level */
727
            get_be32(pb); /* vendor */
728
            get_be32(pb); /* temporal quality */
729
            get_be32(pb); /* spatial quality */
730

    
731
            st->codec->width = get_be16(pb); /* width */
732
            st->codec->height = get_be16(pb); /* height */
733

    
734
            get_be32(pb); /* horiz resolution */
735
            get_be32(pb); /* vert resolution */
736
            get_be32(pb); /* data size, always 0 */
737
            frames_per_sample = get_be16(pb); /* frames per samples */
738

    
739
            dprintf(c->fc, "frames/samples = %d\n", frames_per_sample);
740

    
741
            get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
742
            if (codec_name[0] <= 31) {
743
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
744
                st->codec->codec_name[codec_name[0]] = 0;
745
            }
746

    
747
            st->codec->bits_per_sample = get_be16(pb); /* depth */
748
            st->codec->color_table_id = get_be16(pb); /* colortable id */
749
            dprintf(c->fc, "depth %d, ctab id %d\n",
750
                   st->codec->bits_per_sample, st->codec->color_table_id);
751
            /* figure out the palette situation */
752
            color_depth = st->codec->bits_per_sample & 0x1F;
753
            color_greyscale = st->codec->bits_per_sample & 0x20;
754

    
755
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
756
            if ((color_depth == 2) || (color_depth == 4) ||
757
                (color_depth == 8)) {
758
                if (color_greyscale) {
759
                    /* compute the greyscale palette */
760
                    st->codec->bits_per_sample = color_depth;
761
                    color_count = 1 << color_depth;
762
                    color_index = 255;
763
                    color_dec = 256 / (color_count - 1);
764
                    for (j = 0; j < color_count; j++) {
765
                        r = g = b = color_index;
766
                        c->palette_control.palette[j] =
767
                            (r << 16) | (g << 8) | (b);
768
                        color_index -= color_dec;
769
                        if (color_index < 0)
770
                            color_index = 0;
771
                    }
772
                } else if (st->codec->color_table_id & 0x08) {
773
                    /* if flag bit 3 is set, use the default palette */
774
                    color_count = 1 << color_depth;
775
                    if (color_depth == 2)
776
                        color_table = ff_qt_default_palette_4;
777
                    else if (color_depth == 4)
778
                        color_table = ff_qt_default_palette_16;
779
                    else
780
                        color_table = ff_qt_default_palette_256;
781

    
782
                    for (j = 0; j < color_count; j++) {
783
                        r = color_table[j * 4 + 0];
784
                        g = color_table[j * 4 + 1];
785
                        b = color_table[j * 4 + 2];
786
                        c->palette_control.palette[j] =
787
                            (r << 16) | (g << 8) | (b);
788
                    }
789
                } else {
790
                    /* load the palette from the file */
791
                    color_start = get_be32(pb);
792
                    color_count = get_be16(pb);
793
                    color_end = get_be16(pb);
794
                    if ((color_start <= 255) &&
795
                        (color_end <= 255)) {
796
                        for (j = color_start; j <= color_end; j++) {
797
                            /* each R, G, or B component is 16 bits;
798
                             * only use the top 8 bits; skip alpha bytes
799
                             * up front */
800
                            get_byte(pb);
801
                            get_byte(pb);
802
                            r = get_byte(pb);
803
                            get_byte(pb);
804
                            g = get_byte(pb);
805
                            get_byte(pb);
806
                            b = get_byte(pb);
807
                            get_byte(pb);
808
                            c->palette_control.palette[j] =
809
                                (r << 16) | (g << 8) | (b);
810
                        }
811
                    }
812
                }
813
                st->codec->palctrl = &c->palette_control;
814
                st->codec->palctrl->palette_changed = 1;
815
            } else
816
                st->codec->palctrl = NULL;
817
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
818
            int bits_per_sample;
819
            uint16_t version = get_be16(pb);
820

    
821
            st->codec->codec_id = id;
822
            get_be16(pb); /* revision level */
823
            get_be32(pb); /* vendor */
824

    
825
            st->codec->channels = get_be16(pb);             /* channel count */
826
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
827
            st->codec->bits_per_sample = get_be16(pb);      /* sample size */
828

    
829
            sc->audio_cid = get_be16(pb);
830
            get_be16(pb); /* packet size = 0 */
831

    
832
            st->codec->sample_rate = ((get_be32(pb) >> 16));
833

    
834
            switch (st->codec->codec_id) {
835
            case CODEC_ID_PCM_S8:
836
            case CODEC_ID_PCM_U8:
837
                if (st->codec->bits_per_sample == 16)
838
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
839
                break;
840
            case CODEC_ID_PCM_S16LE:
841
            case CODEC_ID_PCM_S16BE:
842
                if (st->codec->bits_per_sample == 8)
843
                    st->codec->codec_id = CODEC_ID_PCM_S8;
844
                else if (st->codec->bits_per_sample == 24)
845
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
846
                break;
847
            /* set values for old format before stsd version 1 appeared */
848
            case CODEC_ID_MACE3:
849
                sc->samples_per_frame = 6;
850
                sc->bytes_per_frame = 2*st->codec->channels;
851
                break;
852
            case CODEC_ID_MACE6:
853
                sc->samples_per_frame = 6;
854
                sc->bytes_per_frame = 1*st->codec->channels;
855
                break;
856
            case CODEC_ID_ADPCM_IMA_QT:
857
                sc->samples_per_frame = 64;
858
                sc->bytes_per_frame = 34*st->codec->channels;
859
                break;
860
            default:
861
                break;
862
            }
863

    
864
            //Read QT version 1 fields. In version 0 these do not exist.
865
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
866
            if(!c->isom) {
867
                if(version==1) {
868
                    sc->samples_per_frame = get_be32(pb);
869
                    get_be32(pb); /* bytes per packet */
870
                    sc->bytes_per_frame = get_be32(pb);
871
                    get_be32(pb); /* bytes per sample */
872
                } else if(version==2) {
873
                    get_be32(pb); /* sizeof struct only */
874
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
875
                    st->codec->channels = get_be32(pb);
876
                    get_be32(pb); /* always 0x7F000000 */
877
                    get_be32(pb); /* bits per channel if sound is uncompressed */
878
                    get_be32(pb); /* lcpm format specific flag */
879
                    get_be32(pb); /* bytes per audio packet if constant */
880
                    get_be32(pb); /* lpcm frames per audio packet if constant */
881
                }
882
            }
883

    
884
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
885
            if (bits_per_sample) {
886
                st->codec->bits_per_sample = bits_per_sample;
887
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
888
            }
889
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
890
            st->codec->codec_id= id;
891
        } else {
892
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
893
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
894
        }
895
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
896
        a.size = size - (url_ftell(pb) - start_pos);
897
        if (a.size > 8) {
898
            if (mov_read_default(c, pb, a) < 0)
899
                return -1;
900
        } else if (a.size > 0)
901
            url_fskip(pb, a.size);
902
    }
903

    
904
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
905
        st->codec->sample_rate= sc->time_scale;
906

    
907
    /* special codec parameters handling */
908
    switch (st->codec->codec_id) {
909
#ifdef CONFIG_DV_DEMUXER
910
    case CODEC_ID_DVAUDIO:
911
        c->dv_fctx = av_alloc_format_context();
912
        c->dv_demux = dv_init_demux(c->dv_fctx);
913
        if (!c->dv_demux) {
914
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
915
            return -1;
916
        }
917
        sc->dv_audio_container = 1;
918
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
919
        break;
920
#endif
921
    /* no ifdef since parameters are always those */
922
    case CODEC_ID_AMR_WB:
923
        st->codec->sample_rate= 16000;
924
        st->codec->channels= 1; /* really needed */
925
        break;
926
    case CODEC_ID_AMR_NB:
927
        st->codec->sample_rate= 8000;
928
        st->codec->channels= 1; /* really needed */
929
        break;
930
    case CODEC_ID_MP2:
931
    case CODEC_ID_MP3:
932
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
933
        st->need_parsing = AVSTREAM_PARSE_FULL;
934
        break;
935
    case CODEC_ID_ADPCM_MS:
936
    case CODEC_ID_ADPCM_IMA_WAV:
937
        st->codec->block_align = sc->bytes_per_frame;
938
        break;
939
    default:
940
        break;
941
    }
942

    
943
    return 0;
944
}
945

    
946
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
947
{
948
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
949
    MOVStreamContext *sc = st->priv_data;
950
    unsigned int i, entries;
951

    
952
    get_byte(pb); /* version */
953
    get_be24(pb); /* flags */
954

    
955
    entries = get_be32(pb);
956

    
957
    if(entries >= UINT_MAX / sizeof(MOV_stsc_t))
958
        return -1;
959

    
960
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
961

    
962
    sc->sample_to_chunk_sz = entries;
963
    sc->sample_to_chunk = av_malloc(entries * sizeof(MOV_stsc_t));
964
    if (!sc->sample_to_chunk)
965
        return -1;
966
    for(i=0; i<entries; i++) {
967
        sc->sample_to_chunk[i].first = get_be32(pb);
968
        sc->sample_to_chunk[i].count = get_be32(pb);
969
        sc->sample_to_chunk[i].id = get_be32(pb);
970
    }
971
    return 0;
972
}
973

    
974
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
975
{
976
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
977
    MOVStreamContext *sc = st->priv_data;
978
    unsigned int i, entries;
979

    
980
    get_byte(pb); /* version */
981
    get_be24(pb); /* flags */
982

    
983
    entries = get_be32(pb);
984

    
985
    if(entries >= UINT_MAX / sizeof(int))
986
        return -1;
987

    
988
    sc->keyframe_count = entries;
989

    
990
    dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
991

    
992
    sc->keyframes = av_malloc(entries * sizeof(int));
993
    if (!sc->keyframes)
994
        return -1;
995
    for(i=0; i<entries; i++) {
996
        sc->keyframes[i] = get_be32(pb);
997
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
998
    }
999
    return 0;
1000
}
1001

    
1002
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1003
{
1004
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1005
    MOVStreamContext *sc = st->priv_data;
1006
    unsigned int i, entries, sample_size;
1007

    
1008
    get_byte(pb); /* version */
1009
    get_be24(pb); /* flags */
1010

    
1011
    sample_size = get_be32(pb);
1012
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1013
        sc->sample_size = sample_size;
1014
    entries = get_be32(pb);
1015
    if(entries >= UINT_MAX / sizeof(int))
1016
        return -1;
1017

    
1018
    sc->sample_count = entries;
1019
    if (sample_size)
1020
        return 0;
1021

    
1022
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
1023

    
1024
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1025
    if (!sc->sample_sizes)
1026
        return -1;
1027
    for(i=0; i<entries; i++)
1028
        sc->sample_sizes[i] = get_be32(pb);
1029
    return 0;
1030
}
1031

    
1032
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1033
{
1034
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1035
    MOVStreamContext *sc = st->priv_data;
1036
    unsigned int i, entries;
1037
    int64_t duration=0;
1038
    int64_t total_sample_count=0;
1039

    
1040
    get_byte(pb); /* version */
1041
    get_be24(pb); /* flags */
1042
    entries = get_be32(pb);
1043
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1044
        return -1;
1045

    
1046
    sc->stts_count = entries;
1047
    sc->stts_data = av_malloc(entries * sizeof(MOV_stts_t));
1048
    if (!sc->stts_data)
1049
        return -1;
1050
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1051

    
1052
    sc->time_rate=0;
1053

    
1054
    for(i=0; i<entries; i++) {
1055
        int sample_duration;
1056
        int sample_count;
1057

    
1058
        sample_count=get_be32(pb);
1059
        sample_duration = get_be32(pb);
1060
        sc->stts_data[i].count= sample_count;
1061
        sc->stts_data[i].duration= sample_duration;
1062

    
1063
        sc->time_rate= ff_gcd(sc->time_rate, sample_duration);
1064

    
1065
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1066

    
1067
        duration+=(int64_t)sample_duration*sample_count;
1068
        total_sample_count+=sample_count;
1069
    }
1070

    
1071
    st->nb_frames= total_sample_count;
1072
    if(duration)
1073
        st->duration= duration;
1074
    return 0;
1075
}
1076

    
1077
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1078
{
1079
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1080
    MOVStreamContext *sc = st->priv_data;
1081
    unsigned int i, entries;
1082

    
1083
    get_byte(pb); /* version */
1084
    get_be24(pb); /* flags */
1085
    entries = get_be32(pb);
1086
    if(entries >= UINT_MAX / sizeof(MOV_stts_t))
1087
        return -1;
1088

    
1089
    sc->ctts_count = entries;
1090
    sc->ctts_data = av_malloc(entries * sizeof(MOV_stts_t));
1091
    if (!sc->ctts_data)
1092
        return -1;
1093
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1094

    
1095
    for(i=0; i<entries; i++) {
1096
        int count    =get_be32(pb);
1097
        int duration =get_be32(pb);
1098

    
1099
        if (duration < 0) {
1100
            av_log(c->fc, AV_LOG_ERROR, "negative ctts, ignoring\n");
1101
            sc->ctts_count = 0;
1102
            url_fskip(pb, 8 * (entries - i - 1));
1103
            break;
1104
        }
1105
        sc->ctts_data[i].count   = count;
1106
        sc->ctts_data[i].duration= duration;
1107

    
1108
        sc->time_rate= ff_gcd(sc->time_rate, duration);
1109
    }
1110
    return 0;
1111
}
1112

    
1113
static void mov_build_index(MOVContext *mov, AVStream *st)
1114
{
1115
    MOVStreamContext *sc = st->priv_data;
1116
    offset_t current_offset;
1117
    int64_t current_dts = 0;
1118
    unsigned int stts_index = 0;
1119
    unsigned int stsc_index = 0;
1120
    unsigned int stss_index = 0;
1121
    unsigned int i, j;
1122

    
1123
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1124
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1125
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1126
        unsigned int current_sample = 0;
1127
        unsigned int stts_sample = 0;
1128
        unsigned int keyframe, sample_size;
1129
        unsigned int distance = 0;
1130
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1131

    
1132
        st->nb_frames = sc->sample_count;
1133
        for (i = 0; i < sc->chunk_count; i++) {
1134
            current_offset = sc->chunk_offsets[i];
1135
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1136
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1137
                stsc_index++;
1138
            for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) {
1139
                if (current_sample >= sc->sample_count) {
1140
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1141
                    goto out;
1142
                }
1143
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1144
                if (keyframe) {
1145
                    distance = 0;
1146
                    if (stss_index + 1 < sc->keyframe_count)
1147
                        stss_index++;
1148
                }
1149
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1150
                dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1151
                        "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1152
                        current_offset, current_dts, sample_size, distance, keyframe);
1153
                if(sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id)
1154
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1155
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1156
                current_offset += sample_size;
1157
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1158
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1159
                distance++;
1160
                stts_sample++;
1161
                current_sample++;
1162
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1163
                    stts_sample = 0;
1164
                    stts_index++;
1165
                }
1166
            }
1167
        }
1168
    } else { /* read whole chunk */
1169
        unsigned int chunk_samples, chunk_size, chunk_duration;
1170
        unsigned int frames = 1;
1171
        for (i = 0; i < sc->chunk_count; i++) {
1172
            current_offset = sc->chunk_offsets[i];
1173
            if (stsc_index + 1 < sc->sample_to_chunk_sz &&
1174
                i + 1 == sc->sample_to_chunk[stsc_index + 1].first)
1175
                stsc_index++;
1176
            chunk_samples = sc->sample_to_chunk[stsc_index].count;
1177
            /* get chunk size, beware of alaw/ulaw/mace */
1178
            if (sc->samples_per_frame > 0 &&
1179
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1180
                if (sc->samples_per_frame < 1024)
1181
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1182
                else {
1183
                    chunk_size = sc->bytes_per_frame;
1184
                    frames = chunk_samples / sc->samples_per_frame;
1185
                    chunk_samples = sc->samples_per_frame;
1186
                }
1187
            } else
1188
                chunk_size = chunk_samples * sc->sample_size;
1189
            for (j = 0; j < frames; j++) {
1190
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1191
                /* get chunk duration */
1192
                chunk_duration = 0;
1193
                while (chunk_samples > 0) {
1194
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1195
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1196
                        sc->stts_data[stts_index].count -= chunk_samples;
1197
                        break;
1198
                    } else {
1199
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1200
                        chunk_samples -= sc->stts_data[stts_index].count;
1201
                        if (stts_index + 1 < sc->stts_count)
1202
                            stts_index++;
1203
                    }
1204
                }
1205
                current_offset += sc->bytes_per_frame;
1206
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1207
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1208
                        chunk_size, chunk_duration);
1209
                assert(chunk_duration % sc->time_rate == 0);
1210
                current_dts += chunk_duration / sc->time_rate;
1211
            }
1212
        }
1213
    }
1214
 out:
1215
    /* adjust sample count to avindex entries */
1216
    sc->sample_count = st->nb_index_entries;
1217
}
1218

    
1219
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1220
{
1221
    AVStream *st;
1222
    MOVStreamContext *sc;
1223
    int ret;
1224

    
1225
    st = av_new_stream(c->fc, c->fc->nb_streams);
1226
    if (!st) return AVERROR(ENOMEM);
1227
    sc = av_mallocz(sizeof(MOVStreamContext));
1228
    if (!sc) return AVERROR(ENOMEM);
1229

    
1230
    st->priv_data = sc;
1231
    st->codec->codec_type = CODEC_TYPE_DATA;
1232
    st->start_time = 0; /* XXX: check */
1233

    
1234
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1235
        return ret;
1236

    
1237
    /* sanity checks */
1238
    if(!sc->stts_count || !sc->chunk_count || !sc->sample_to_chunk_sz ||
1239
       (!sc->sample_size && !sc->sample_count)){
1240
        av_log(c->fc, AV_LOG_ERROR, "missing mandatory atoms, broken header\n");
1241
        sc->sample_count = 0; //ignore track
1242
        return 0;
1243
    }
1244
    if(!sc->time_rate)
1245
        sc->time_rate=1;
1246
    if(!sc->time_scale)
1247
        sc->time_scale= c->time_scale;
1248
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1249

    
1250
    if (st->codec->codec_type == CODEC_TYPE_AUDIO && sc->stts_count == 1)
1251
        st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale);
1252

    
1253
    if(st->duration != AV_NOPTS_VALUE){
1254
        assert(st->duration % sc->time_rate == 0);
1255
        st->duration /= sc->time_rate;
1256
    }
1257
    sc->ffindex = st->index;
1258
    mov_build_index(c, st);
1259

    
1260
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1261
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1262
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening external essence: %s\n",
1263
                   st->index, strerror(errno));
1264
    } else
1265
        sc->pb = c->fc->pb;
1266

    
1267
    switch (st->codec->codec_id) {
1268
#ifdef CONFIG_H261_DECODER
1269
    case CODEC_ID_H261:
1270
#endif
1271
#ifdef CONFIG_H263_DECODER
1272
    case CODEC_ID_H263:
1273
#endif
1274
#ifdef CONFIG_MPEG4_DECODER
1275
    case CODEC_ID_MPEG4:
1276
#endif
1277
        st->codec->width= 0; /* let decoder init width/height */
1278
        st->codec->height= 0;
1279
        break;
1280
#ifdef CONFIG_LIBFAAD
1281
    case CODEC_ID_AAC:
1282
#endif
1283
#ifdef CONFIG_VORBIS_DECODER
1284
    case CODEC_ID_VORBIS:
1285
#endif
1286
    case CODEC_ID_MP3ON4:
1287
        st->codec->sample_rate= 0; /* let decoder init parameters properly */
1288
        break;
1289
    }
1290

    
1291
    /* Do not need those anymore. */
1292
    av_freep(&sc->chunk_offsets);
1293
    av_freep(&sc->sample_to_chunk);
1294
    av_freep(&sc->sample_sizes);
1295
    av_freep(&sc->keyframes);
1296
    av_freep(&sc->stts_data);
1297

    
1298
    return 0;
1299
}
1300

    
1301
static void mov_parse_udta_string(ByteIOContext *pb, char *str, int size)
1302
{
1303
    uint16_t str_size = get_be16(pb); /* string length */;
1304

    
1305
    get_be16(pb); /* skip language */
1306
    get_buffer(pb, str, FFMIN(size, str_size));
1307
}
1308

    
1309
static int mov_read_udta(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1310
{
1311
    uint64_t end = url_ftell(pb) + atom.size;
1312

    
1313
    while (url_ftell(pb) + 8 < end) {
1314
        uint32_t tag_size = get_be32(pb);
1315
        uint32_t tag      = get_le32(pb);
1316
        uint64_t next     = url_ftell(pb) + tag_size - 8;
1317

    
1318
        if (next > end) // stop if tag_size is wrong
1319
            break;
1320

    
1321
        switch (tag) {
1322
        case MKTAG(0xa9,'n','a','m'):
1323
            mov_parse_udta_string(pb, c->fc->title,     sizeof(c->fc->title));
1324
            break;
1325
        case MKTAG(0xa9,'w','r','t'):
1326
            mov_parse_udta_string(pb, c->fc->author,    sizeof(c->fc->author));
1327
            break;
1328
        case MKTAG(0xa9,'c','p','y'):
1329
            mov_parse_udta_string(pb, c->fc->copyright, sizeof(c->fc->copyright));
1330
            break;
1331
        case MKTAG(0xa9,'i','n','f'):
1332
            mov_parse_udta_string(pb, c->fc->comment,   sizeof(c->fc->comment));
1333
            break;
1334
        default:
1335
            break;
1336
        }
1337

    
1338
        url_fseek(pb, next, SEEK_SET);
1339
    }
1340

    
1341
    return 0;
1342
}
1343

    
1344
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1345
{
1346
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1347
    int version = get_byte(pb);
1348

    
1349
    get_be24(pb); /* flags */
1350
    /*
1351
    MOV_TRACK_ENABLED 0x0001
1352
    MOV_TRACK_IN_MOVIE 0x0002
1353
    MOV_TRACK_IN_PREVIEW 0x0004
1354
    MOV_TRACK_IN_POSTER 0x0008
1355
    */
1356

    
1357
    if (version == 1) {
1358
        get_be64(pb);
1359
        get_be64(pb);
1360
    } else {
1361
        get_be32(pb); /* creation time */
1362
        get_be32(pb); /* modification time */
1363
    }
1364
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1365
    get_be32(pb); /* reserved */
1366
    st->start_time = 0; /* check */
1367
    /* highlevel (considering edits) duration in movie timebase */
1368
    (version == 1) ? get_be64(pb) : get_be32(pb);
1369
    get_be32(pb); /* reserved */
1370
    get_be32(pb); /* reserved */
1371

    
1372
    get_be16(pb); /* layer */
1373
    get_be16(pb); /* alternate group */
1374
    get_be16(pb); /* volume */
1375
    get_be16(pb); /* reserved */
1376

    
1377
    url_fskip(pb, 36); /* display matrix */
1378

    
1379
    /* those are fixed-point */
1380
    get_be32(pb); /* track width */
1381
    get_be32(pb); /* track height */
1382

    
1383
    return 0;
1384
}
1385

    
1386
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1387
{
1388
    MOVFragment *frag = &c->fragment;
1389
    MOVTrackExt *trex = NULL;
1390
    int flags, track_id, i;
1391

    
1392
    get_byte(pb); /* version */
1393
    flags = get_be24(pb);
1394

    
1395
    track_id = get_be32(pb);
1396
    if (!track_id || track_id > c->fc->nb_streams)
1397
        return -1;
1398
    frag->track_id = track_id;
1399
    for (i = 0; i < c->trex_count; i++)
1400
        if (c->trex_data[i].track_id == frag->track_id) {
1401
            trex = &c->trex_data[i];
1402
            break;
1403
        }
1404
    if (!trex) {
1405
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1406
        return -1;
1407
    }
1408

    
1409
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1410
    else              frag->base_data_offset = frag->moof_offset;
1411
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1412
    else              frag->stsd_id          = trex->stsd_id;
1413

    
1414
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1415
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1416
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1417
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1418
    return 0;
1419
}
1420

    
1421
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1422
{
1423
    MOVTrackExt *trex;
1424

    
1425
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1426
        return -1;
1427
    c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1428
    if (!c->trex_data)
1429
        return AVERROR(ENOMEM);
1430
    trex = &c->trex_data[c->trex_count++];
1431
    get_byte(pb); /* version */
1432
    get_be24(pb); /* flags */
1433
    trex->track_id = get_be32(pb);
1434
    trex->stsd_id  = get_be32(pb);
1435
    trex->duration = get_be32(pb);
1436
    trex->size     = get_be32(pb);
1437
    trex->flags    = get_be32(pb);
1438
    return 0;
1439
}
1440

    
1441
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1442
{
1443
    MOVFragment *frag = &c->fragment;
1444
    AVStream *st = c->fc->streams[frag->track_id-1];
1445
    MOVStreamContext *sc = st->priv_data;
1446
    uint64_t offset;
1447
    int64_t dts;
1448
    int data_offset = 0;
1449
    unsigned entries, first_sample_flags = frag->flags;
1450
    int flags, distance, i;
1451

    
1452
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1453
        return 0;
1454
    if (!st->nb_index_entries)
1455
        return -1;
1456
    get_byte(pb); /* version */
1457
    flags = get_be24(pb);
1458
    entries = get_be32(pb);
1459
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1460
    if (flags & 0x001) data_offset        = get_be32(pb);
1461
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1462
    if (flags & 0x800) {
1463
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1464
            return -1;
1465
        sc->ctts_data = av_realloc(sc->ctts_data,
1466
                                   (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1467
        if (!sc->ctts_data)
1468
            return AVERROR(ENOMEM);
1469
    }
1470
    dts = st->duration;
1471
    offset = frag->base_data_offset + data_offset;
1472
    distance = 0;
1473
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1474
    for (i = 0; i < entries; i++) {
1475
        unsigned sample_size = frag->size;
1476
        int sample_flags = i ? frag->flags : first_sample_flags;
1477
        unsigned sample_duration = frag->duration;
1478
        int keyframe;
1479

    
1480
        if (flags & 0x100) sample_duration = get_be32(pb);
1481
        if (flags & 0x200) sample_size     = get_be32(pb);
1482
        if (flags & 0x400) sample_flags    = get_be32(pb);
1483
        if (flags & 0x800) {
1484
            sc->ctts_data[sc->ctts_count].count = 1;
1485
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1486
            sc->ctts_count++;
1487
        }
1488
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1489
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1490
            distance = 0;
1491
        av_add_index_entry(st, offset, dts, sample_size, distance,
1492
                           keyframe ? AVINDEX_KEYFRAME : 0);
1493
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1494
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1495
                offset, dts, sample_size, distance, keyframe);
1496
        distance++;
1497
        assert(sample_duration % sc->time_rate == 0);
1498
        dts += sample_duration / sc->time_rate;
1499
        offset += sample_size;
1500
    }
1501
    frag->moof_offset = offset;
1502
    sc->sample_count = st->nb_index_entries;
1503
    st->duration = dts;
1504
    return 0;
1505
}
1506

    
1507
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1508
/* like the files created with Adobe Premiere 5.0, for samples see */
1509
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1510
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1511
{
1512
    int err;
1513

    
1514
    if (atom.size < 8)
1515
        return 0; /* continue */
1516
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1517
        url_fskip(pb, atom.size - 4);
1518
        return 0;
1519
    }
1520
    atom.type = get_le32(pb);
1521
    atom.offset += 8;
1522
    atom.size -= 8;
1523
    if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1524
        url_fskip(pb, atom.size);
1525
        return 0;
1526
    }
1527
    err = mov_read_mdat(c, pb, atom);
1528
    return err;
1529
}
1530

    
1531
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1532
{
1533
#ifdef CONFIG_ZLIB
1534
    ByteIOContext ctx;
1535
    uint8_t *cmov_data;
1536
    uint8_t *moov_data; /* uncompressed data */
1537
    long cmov_len, moov_len;
1538
    int ret;
1539

    
1540
    get_be32(pb); /* dcom atom */
1541
    if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1542
        return -1;
1543
    if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1544
        av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");
1545
        return -1;
1546
    }
1547
    get_be32(pb); /* cmvd atom */
1548
    if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1549
        return -1;
1550
    moov_len = get_be32(pb); /* uncompressed size */
1551
    cmov_len = atom.size - 6 * 4;
1552

    
1553
    cmov_data = av_malloc(cmov_len);
1554
    if (!cmov_data)
1555
        return -1;
1556
    moov_data = av_malloc(moov_len);
1557
    if (!moov_data) {
1558
        av_free(cmov_data);
1559
        return -1;
1560
    }
1561
    get_buffer(pb, cmov_data, cmov_len);
1562
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1563
        return -1;
1564
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1565
        return -1;
1566
    atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1567
    atom.offset = 0;
1568
    atom.size = moov_len;
1569
#ifdef DEBUG
1570
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1571
#endif
1572
    ret = mov_read_default(c, &ctx, atom);
1573
    av_free(moov_data);
1574
    av_free(cmov_data);
1575
    return ret;
1576
#else
1577
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1578
    return -1;
1579
#endif
1580
}
1581

    
1582
/* edit list atom */
1583
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1584
{
1585
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1586
    int i, edit_count;
1587

    
1588
    get_byte(pb); /* version */
1589
    get_be24(pb); /* flags */
1590
    edit_count= sc->edit_count = get_be32(pb);     /* entries */
1591

    
1592
    for(i=0; i<edit_count; i++){
1593
        int time;
1594
        get_be32(pb); /* Track duration */
1595
        time = get_be32(pb); /* Media time */
1596
        get_be32(pb); /* Media rate */
1597
        if (time != 0)
1598
            av_log(c->fc, AV_LOG_WARNING, "edit list not starting at 0, "
1599
                   "a/v desync might occur, patch welcome\n");
1600
    }
1601
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count);
1602
    return 0;
1603
}
1604

    
1605
static const MOVParseTableEntry mov_default_parse_table[] = {
1606
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1607
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1608
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default },
1609
{ MKTAG( 'd', 'r', 'e', 'f' ), mov_read_dref },
1610
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1611
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1612
{ MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },
1613
{ MKTAG( 'f', 'i', 'e', 'l' ), mov_read_extradata },
1614
{ MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },
1615
{ MKTAG( 'g', 'l', 'b', 'l' ), mov_read_glbl },
1616
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1617
{ MKTAG( 'j', 'p', '2', 'h' ), mov_read_extradata },
1618
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1619
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1620
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1621
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1622
{ MKTAG( 'm', 'o', 'o', 'f' ), mov_read_moof },
1623
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1624
{ MKTAG( 'm', 'v', 'e', 'x' ), mov_read_default },
1625
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1626
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1627
{ MKTAG( 'a', 'l', 'a', 'c' ), mov_read_extradata }, /* alac specific atom */
1628
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_glbl },
1629
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1630
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1631
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1632
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1633
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1634
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1635
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1636
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1637
{ MKTAG( 't', 'f', 'h', 'd' ), mov_read_tfhd }, /* track fragment header */
1638
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1639
{ MKTAG( 't', 'r', 'a', 'f' ), mov_read_default },
1640
{ MKTAG( 't', 'r', 'e', 'x' ), mov_read_trex },
1641
{ MKTAG( 't', 'r', 'u', 'n' ), mov_read_trun },
1642
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_udta },
1643
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
1644
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1645
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1646
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1647
{ 0, NULL }
1648
};
1649

    
1650
static int mov_probe(AVProbeData *p)
1651
{
1652
    unsigned int offset;
1653
    uint32_t tag;
1654
    int score = 0;
1655

    
1656
    /* check file header */
1657
    offset = 0;
1658
    for(;;) {
1659
        /* ignore invalid offset */
1660
        if ((offset + 8) > (unsigned int)p->buf_size)
1661
            return score;
1662
        tag = AV_RL32(p->buf + offset + 4);
1663
        switch(tag) {
1664
        /* check for obvious tags */
1665
        case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */
1666
        case MKTAG( 'm', 'o', 'o', 'v' ):
1667
        case MKTAG( 'm', 'd', 'a', 't' ):
1668
        case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1669
        case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1670
            return AVPROBE_SCORE_MAX;
1671
        /* those are more common words, so rate then a bit less */
1672
        case MKTAG( 'e', 'd', 'i', 'w' ): /* xdcam files have reverted first tags */
1673
        case MKTAG( 'w', 'i', 'd', 'e' ):
1674
        case MKTAG( 'f', 'r', 'e', 'e' ):
1675
        case MKTAG( 'j', 'u', 'n', 'k' ):
1676
        case MKTAG( 'p', 'i', 'c', 't' ):
1677
            return AVPROBE_SCORE_MAX - 5;
1678
        case MKTAG(0x82,0x82,0x7f,0x7d ):
1679
        case MKTAG( 'f', 't', 'y', 'p' ):
1680
        case MKTAG( 's', 'k', 'i', 'p' ):
1681
        case MKTAG( 'u', 'u', 'i', 'd' ):
1682
            offset = AV_RB32(p->buf+offset) + offset;
1683
            /* if we only find those cause probedata is too small at least rate them */
1684
            score = AVPROBE_SCORE_MAX - 50;
1685
            break;
1686
        default:
1687
            /* unrecognized tag */
1688
            return score;
1689
        }
1690
    }
1691
    return score;
1692
}
1693

    
1694
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1695
{
1696
    MOVContext *mov = s->priv_data;
1697
    ByteIOContext *pb = s->pb;
1698
    int err;
1699
    MOV_atom_t atom = { 0, 0, 0 };
1700

    
1701
    mov->fc = s;
1702
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1703
    if(!url_is_streamed(pb))
1704
        atom.size = url_fsize(pb);
1705
    else
1706
        atom.size = INT64_MAX;
1707

    
1708
    /* check MOV header */
1709
    err = mov_read_default(mov, pb, atom);
1710
    if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1711
        av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",
1712
               err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1713
        return -1;
1714
    }
1715
    dprintf(mov->fc, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1716

    
1717
    return 0;
1718
}
1719

    
1720
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1721
{
1722
    MOVContext *mov = s->priv_data;
1723
    MOVStreamContext *sc = 0;
1724
    AVIndexEntry *sample = 0;
1725
    int64_t best_dts = INT64_MAX;
1726
    int i;
1727
 retry:
1728
    for (i = 0; i < s->nb_streams; i++) {
1729
        AVStream *st = s->streams[i];
1730
        MOVStreamContext *msc = st->priv_data;
1731
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
1732
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1733
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1734
                                     AV_TIME_BASE, msc->time_scale);
1735
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1736
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1737
                (!url_is_streamed(s->pb) &&
1738
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1739
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1740
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1741
                sample = current_sample;
1742
                best_dts = dts;
1743
                sc = msc;
1744
            }
1745
        }
1746
    }
1747
    if (!sample) {
1748
        mov->found_mdat = 0;
1749
        if (!url_is_streamed(s->pb) ||
1750
            mov_read_default(mov, s->pb, (MOV_atom_t){ 0, 0, INT64_MAX }) < 0 ||
1751
            url_feof(s->pb))
1752
            return -1;
1753
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1754
        goto retry;
1755
    }
1756
    /* must be done just before reading, to avoid infinite loop on sample */
1757
    sc->current_sample++;
1758
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1759
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1760
               sc->ffindex, sample->pos);
1761
        return -1;
1762
    }
1763
    av_get_packet(sc->pb, pkt, sample->size);
1764
#ifdef CONFIG_DV_DEMUXER
1765
    if (mov->dv_demux && sc->dv_audio_container) {
1766
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1767
        av_free(pkt->data);
1768
        pkt->size = 0;
1769
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1770
            return -1;
1771
    }
1772
#endif
1773
    pkt->stream_index = sc->ffindex;
1774
    pkt->dts = sample->timestamp;
1775
    if (sc->ctts_data) {
1776
        assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
1777
        pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate;
1778
        /* update ctts context */
1779
        sc->sample_to_ctime_sample++;
1780
        if (sc->sample_to_ctime_index < sc->ctts_count &&
1781
            sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
1782
            sc->sample_to_ctime_index++;
1783
            sc->sample_to_ctime_sample = 0;
1784
        }
1785
    } else {
1786
        pkt->pts = pkt->dts;
1787
    }
1788
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1789
    pkt->pos = sample->pos;
1790
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1791
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1792
    return 0;
1793
}
1794

    
1795
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1796
{
1797
    MOVStreamContext *sc = st->priv_data;
1798
    int sample, time_sample;
1799
    int i;
1800

    
1801
    sample = av_index_search_timestamp(st, timestamp, flags);
1802
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1803
    if (sample < 0) /* not sure what to do */
1804
        return -1;
1805
    sc->current_sample = sample;
1806
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1807
    /* adjust ctts index */
1808
    if (sc->ctts_data) {
1809
        time_sample = 0;
1810
        for (i = 0; i < sc->ctts_count; i++) {
1811
            int next = time_sample + sc->ctts_data[i].count;
1812
            if (next > sc->current_sample) {
1813
                sc->sample_to_ctime_index = i;
1814
                sc->sample_to_ctime_sample = sc->current_sample - time_sample;
1815
                break;
1816
            }
1817
            time_sample = next;
1818
        }
1819
    }
1820
    return sample;
1821
}
1822

    
1823
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1824
{
1825
    AVStream *st;
1826
    int64_t seek_timestamp, timestamp;
1827
    int sample;
1828
    int i;
1829

    
1830
    if (stream_index >= s->nb_streams)
1831
        return -1;
1832

    
1833
    st = s->streams[stream_index];
1834
    sample = mov_seek_stream(st, sample_time, flags);
1835
    if (sample < 0)
1836
        return -1;
1837

    
1838
    /* adjust seek timestamp to found sample timestamp */
1839
    seek_timestamp = st->index_entries[sample].timestamp;
1840

    
1841
    for (i = 0; i < s->nb_streams; i++) {
1842
        st = s->streams[i];
1843
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1844
            continue;
1845

    
1846
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1847
        mov_seek_stream(st, timestamp, flags);
1848
    }
1849
    return 0;
1850
}
1851

    
1852
static int mov_read_close(AVFormatContext *s)
1853
{
1854
    int i, j;
1855
    MOVContext *mov = s->priv_data;
1856
    for(i=0; i<s->nb_streams; i++) {
1857
        MOVStreamContext *sc = s->streams[i]->priv_data;
1858
        av_freep(&sc->ctts_data);
1859
        for (j=0; j<sc->drefs_count; j++)
1860
            av_freep(&sc->drefs[j].path);
1861
        av_freep(&sc->drefs);
1862
        if (sc->pb && sc->pb != s->pb)
1863
            url_fclose(sc->pb);
1864
    }
1865
    if(mov->dv_demux){
1866
        for(i=0; i<mov->dv_fctx->nb_streams; i++){
1867
            av_freep(&mov->dv_fctx->streams[i]->codec);
1868
            av_freep(&mov->dv_fctx->streams[i]);
1869
        }
1870
        av_freep(&mov->dv_fctx);
1871
        av_freep(&mov->dv_demux);
1872
    }
1873
    av_freep(&mov->trex_data);
1874
    return 0;
1875
}
1876

    
1877
AVInputFormat mov_demuxer = {
1878
    "mov,mp4,m4a,3gp,3g2,mj2",
1879
    "QuickTime/MPEG4/Motion JPEG 2000 format",
1880
    sizeof(MOVContext),
1881
    mov_probe,
1882
    mov_read_header,
1883
    mov_read_packet,
1884
    mov_read_close,
1885
    mov_read_seek,
1886
};