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ffmpeg / libavformat / mov.c @ 6a63ff19

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1
/*
2
 * MOV demuxer
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 * Copyright (c) 2001 Fabrice Bellard
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 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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 *
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 * This file is part of FFmpeg.
7
 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * 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,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * 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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 */
22

    
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#include <limits.h>
24

    
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//#define DEBUG
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//#define DEBUG_METADATA
27
//#define MOV_EXPORT_ALL_METADATA
28

    
29
#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
32
#include "riff.h"
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#include "isom.h"
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#include "libavcodec/mpeg4audio.h"
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#include "libavcodec/mpegaudiodata.h"
36
#include "libavcodec/get_bits.h"
37

    
38
#if CONFIG_ZLIB
39
#include <zlib.h>
40
#endif
41

    
42
/*
43
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
45
 *
46
 * Features and limitations:
47
 * - 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 :-)
50
 *
51
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
53
 *
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 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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 * Apple:
57
 *  http://developer.apple.com/documentation/QuickTime/QTFF/
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
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 * QuickTime is a trademark of Apple (AFAIK :))
60
 */
61

    
62
#include "qtpalette.h"
63

    
64

    
65
#undef NDEBUG
66
#include <assert.h>
67

    
68
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
69

    
70
/* those functions parse an atom */
71
/* return code:
72
  0: continue to parse next atom
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 <0: error occurred, exit
74
*/
75
/* links atom IDs to parse functions */
76
typedef struct MOVParseTableEntry {
77
    uint32_t type;
78
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
79
} MOVParseTableEntry;
80

    
81
static const MOVParseTableEntry mov_default_parse_table[];
82

    
83
static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
84
{
85
    char buf[16];
86

    
87
    get_be16(pb); // unknown
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    snprintf(buf, sizeof(buf), "%d", get_be16(pb));
89
    av_metadata_set(&c->fc->metadata, "track", buf);
90

    
91
    get_be16(pb); // total tracks
92

    
93
    return 0;
94
}
95

    
96
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
97
{
98
#ifdef MOV_EXPORT_ALL_METADATA
99
    char tmp_key[5];
100
#endif
101
    char str[1024], key2[16], language[4] = {0};
102
    const char *key = NULL;
103
    uint16_t str_size;
104
    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
105

    
106
    switch (atom.type) {
107
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
108
    case MKTAG(0xa9,'a','u','t'):
109
    case MKTAG(0xa9,'A','R','T'):
110
    case MKTAG(0xa9,'w','r','t'): key = "author";    break;
111
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
112
    case MKTAG(0xa9,'c','m','t'):
113
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
114
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
115
    case MKTAG(0xa9,'d','a','y'): key = "year";      break;
116
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
117
    case MKTAG(0xa9,'t','o','o'):
118
    case MKTAG(0xa9,'e','n','c'): key = "muxer";     break;
119
    case MKTAG( 't','r','k','n'): key = "track";
120
        parse = mov_metadata_trkn; break;
121
    }
122

    
123
    if (c->itunes_metadata && atom.size > 8) {
124
        int data_size = get_be32(pb);
125
        int tag = get_le32(pb);
126
        if (tag == MKTAG('d','a','t','a')) {
127
            get_be32(pb); // type
128
            get_be32(pb); // unknown
129
            str_size = data_size - 16;
130
            atom.size -= 16;
131
        } else return 0;
132
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
133
        str_size = get_be16(pb); // string length
134
        ff_mov_lang_to_iso639(get_be16(pb), language);
135
        atom.size -= 4;
136
    } else
137
        str_size = atom.size;
138

    
139
#ifdef MOV_EXPORT_ALL_METADATA
140
    if (!key) {
141
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
142
        key = tmp_key;
143
    }
144
#endif
145

    
146
    if (!key)
147
        return 0;
148
    if (atom.size < 0)
149
        return -1;
150

    
151
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
152

    
153
    if (parse)
154
        parse(c, pb, str_size);
155
    else {
156
        get_buffer(pb, str, str_size);
157
        str[str_size] = 0;
158
        av_metadata_set(&c->fc->metadata, key, str);
159
        if (*language && strcmp(language, "und")) {
160
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
161
            av_metadata_set(&c->fc->metadata, key2, str);
162
        }
163
    }
164
#ifdef DEBUG_METADATA
165
    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
166
    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
167
           key, str, (char*)&atom.type, str_size, atom.size);
168
#endif
169

    
170
    return 0;
171
}
172

    
173
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
174
{
175
    int64_t total_size = 0;
176
    MOVAtom a;
177
    int i;
178
    int err = 0;
179

    
180
    a.offset = atom.offset;
181

    
182
    if (atom.size < 0)
183
        atom.size = INT64_MAX;
184
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
185
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
186
        a.size = atom.size;
187
        a.type=0;
188
        if(atom.size >= 8) {
189
            a.size = get_be32(pb);
190
            a.type = get_le32(pb);
191
        }
192
        total_size += 8;
193
        a.offset += 8;
194
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
195
                a.type, (char*)&a.type, a.size, atom.size, total_size);
196
        if (a.size == 1) { /* 64 bit extended size */
197
            a.size = get_be64(pb) - 8;
198
            a.offset += 8;
199
            total_size += 8;
200
        }
201
        if (a.size == 0) {
202
            a.size = atom.size - total_size;
203
            if (a.size <= 8)
204
                break;
205
        }
206
        a.size -= 8;
207
        if(a.size < 0)
208
            break;
209
        a.size = FFMIN(a.size, atom.size - total_size);
210

    
211
        for (i = 0; mov_default_parse_table[i].type; i++)
212
            if (mov_default_parse_table[i].type == a.type) {
213
                parse = mov_default_parse_table[i].parse;
214
                break;
215
            }
216

    
217
        // container is user data
218
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
219
                       atom.type == MKTAG('i','l','s','t')))
220
            parse = mov_read_udta_string;
221

    
222
        if (!parse) { /* skip leaf atoms data */
223
            url_fskip(pb, a.size);
224
        } else {
225
            int64_t start_pos = url_ftell(pb);
226
            int64_t left;
227
            err = parse(c, pb, a);
228
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
229
                break;
230
            left = a.size - url_ftell(pb) + start_pos;
231
            if (left > 0) /* skip garbage at atom end */
232
                url_fskip(pb, left);
233
        }
234

    
235
        a.offset += a.size;
236
        total_size += a.size;
237
    }
238

    
239
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
240
        url_fskip(pb, atom.size - total_size);
241

    
242
    return err;
243
}
244

    
245
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
246
{
247
    AVStream *st;
248
    MOVStreamContext *sc;
249
    int entries, i, j;
250

    
251
    if (c->fc->nb_streams < 1)
252
        return 0;
253
    st = c->fc->streams[c->fc->nb_streams-1];
254
    sc = st->priv_data;
255

    
256
    get_be32(pb); // version + flags
257
    entries = get_be32(pb);
258
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
259
        return -1;
260
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
261
    if (!sc->drefs)
262
        return AVERROR(ENOMEM);
263
    sc->drefs_count = entries;
264

    
265
    for (i = 0; i < sc->drefs_count; i++) {
266
        MOVDref *dref = &sc->drefs[i];
267
        uint32_t size = get_be32(pb);
268
        int64_t next = url_ftell(pb) + size - 4;
269

    
270
        dref->type = get_le32(pb);
271
        get_be32(pb); // version + flags
272
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
273

    
274
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
275
            /* macintosh alias record */
276
            uint16_t volume_len, len;
277
            char volume[28];
278
            int16_t type;
279

    
280
            url_fskip(pb, 10);
281

    
282
            volume_len = get_byte(pb);
283
            volume_len = FFMIN(volume_len, 27);
284
            get_buffer(pb, volume, 27);
285
            volume[volume_len] = 0;
286
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
287

    
288
            url_fskip(pb, 112);
289

    
290
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
291
                type = get_be16(pb);
292
                len = get_be16(pb);
293
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
294
                if (len&1)
295
                    len += 1;
296
                if (type == 2) { // absolute path
297
                    av_free(dref->path);
298
                    dref->path = av_mallocz(len+1);
299
                    if (!dref->path)
300
                        return AVERROR(ENOMEM);
301
                    get_buffer(pb, dref->path, len);
302
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
303
                        len -= volume_len;
304
                        memmove(dref->path, dref->path+volume_len, len);
305
                        dref->path[len] = 0;
306
                    }
307
                    for (j = 0; j < len; j++)
308
                        if (dref->path[j] == ':')
309
                            dref->path[j] = '/';
310
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
311
                } else
312
                    url_fskip(pb, len);
313
            }
314
        }
315
        url_fseek(pb, next, SEEK_SET);
316
    }
317
    return 0;
318
}
319

    
320
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
321
{
322
    AVStream *st;
323
    uint32_t type;
324
    uint32_t ctype;
325

    
326
    if (c->fc->nb_streams < 1) // meta before first trak
327
        return 0;
328

    
329
    st = c->fc->streams[c->fc->nb_streams-1];
330

    
331
    get_byte(pb); /* version */
332
    get_be24(pb); /* flags */
333

    
334
    /* component type */
335
    ctype = get_le32(pb);
336
    type = get_le32(pb); /* component subtype */
337

    
338
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
339
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
340

    
341
    if     (type == MKTAG('v','i','d','e'))
342
        st->codec->codec_type = CODEC_TYPE_VIDEO;
343
    else if(type == MKTAG('s','o','u','n'))
344
        st->codec->codec_type = CODEC_TYPE_AUDIO;
345
    else if(type == MKTAG('m','1','a',' '))
346
        st->codec->codec_id = CODEC_ID_MP2;
347
    else if(type == MKTAG('s','u','b','p'))
348
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
349

    
350
    get_be32(pb); /* component  manufacture */
351
    get_be32(pb); /* component flags */
352
    get_be32(pb); /* component flags mask */
353

    
354
    if(atom.size <= 24)
355
        return 0; /* nothing left to read */
356

    
357
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
358
    return 0;
359
}
360

    
361
static int mp4_read_descr_len(ByteIOContext *pb)
362
{
363
    int len = 0;
364
    int count = 4;
365
    while (count--) {
366
        int c = get_byte(pb);
367
        len = (len << 7) | (c & 0x7f);
368
        if (!(c & 0x80))
369
            break;
370
    }
371
    return len;
372
}
373

    
374
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
375
{
376
    int len;
377
    *tag = get_byte(pb);
378
    len = mp4_read_descr_len(pb);
379
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
380
    return len;
381
}
382

    
383
#define MP4ESDescrTag                   0x03
384
#define MP4DecConfigDescrTag            0x04
385
#define MP4DecSpecificDescrTag          0x05
386

    
387
static const AVCodecTag mp4_audio_types[] = {
388
    { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
389
    { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
390
    { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
391
    { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
392
    { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
393
    { CODEC_ID_NONE,   AOT_NULL },
394
};
395

    
396
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
397
{
398
    AVStream *st;
399
    int tag, len;
400

    
401
    if (c->fc->nb_streams < 1)
402
        return 0;
403
    st = c->fc->streams[c->fc->nb_streams-1];
404

    
405
    get_be32(pb); /* version + flags */
406
    len = mp4_read_descr(c, pb, &tag);
407
    if (tag == MP4ESDescrTag) {
408
        get_be16(pb); /* ID */
409
        get_byte(pb); /* priority */
410
    } else
411
        get_be16(pb); /* ID */
412

    
413
    len = mp4_read_descr(c, pb, &tag);
414
    if (tag == MP4DecConfigDescrTag) {
415
        int object_type_id = get_byte(pb);
416
        get_byte(pb); /* stream type */
417
        get_be24(pb); /* buffer size db */
418
        get_be32(pb); /* max bitrate */
419
        get_be32(pb); /* avg bitrate */
420

    
421
        st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
422
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
423
        len = mp4_read_descr(c, pb, &tag);
424
        if (tag == MP4DecSpecificDescrTag) {
425
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
426
            if((uint64_t)len > (1<<30))
427
                return -1;
428
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
429
            if (!st->codec->extradata)
430
                return AVERROR(ENOMEM);
431
            get_buffer(pb, st->codec->extradata, len);
432
            st->codec->extradata_size = len;
433
            if (st->codec->codec_id == CODEC_ID_AAC) {
434
                MPEG4AudioConfig cfg;
435
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
436
                                         st->codec->extradata_size);
437
                if (cfg.chan_config > 7)
438
                    return -1;
439
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
440
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
441
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
442
                else
443
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
444
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
445
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
446
                        cfg.object_type, cfg.ext_object_type,
447
                        cfg.sample_rate, cfg.ext_sample_rate);
448
                if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
449
                                                            cfg.object_type)))
450
                    st->codec->codec_id = CODEC_ID_AAC;
451
            }
452
        }
453
    }
454
    return 0;
455
}
456

    
457
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
458
{
459
    const int num = get_be32(pb);
460
    const int den = get_be32(pb);
461
    AVStream *st;
462

    
463
    if (c->fc->nb_streams < 1)
464
        return 0;
465
    st = c->fc->streams[c->fc->nb_streams-1];
466

    
467
    if (den != 0) {
468
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
469
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
470
            av_log(c->fc, AV_LOG_WARNING,
471
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
472
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
473
        st->sample_aspect_ratio.num = num;
474
        st->sample_aspect_ratio.den = den;
475
    }
476
    return 0;
477
}
478

    
479
/* this atom contains actual media data */
480
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
481
{
482
    if(atom.size == 0) /* wrong one (MP4) */
483
        return 0;
484
    c->found_mdat=1;
485
    return 0; /* now go for moov */
486
}
487

    
488
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
489
{
490
    uint32_t type = get_le32(pb);
491

    
492
    if (type != MKTAG('q','t',' ',' '))
493
        c->isom = 1;
494
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
495
    get_be32(pb); /* minor version */
496
    url_fskip(pb, atom.size - 8);
497
    return 0;
498
}
499

    
500
/* this atom should contain all header atoms */
501
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
502
{
503
    if (mov_read_default(c, pb, atom) < 0)
504
        return -1;
505
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
506
    /* so we don't parse the whole file if over a network */
507
    c->found_moov=1;
508
    return 0; /* now go for mdat */
509
}
510

    
511
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
512
{
513
    c->fragment.moof_offset = url_ftell(pb) - 8;
514
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
515
    return mov_read_default(c, pb, atom);
516
}
517

    
518
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
519
{
520
    AVStream *st;
521
    MOVStreamContext *sc;
522
    int version;
523
    char language[4] = {0};
524
    unsigned lang;
525

    
526
    if (c->fc->nb_streams < 1)
527
        return 0;
528
    st = c->fc->streams[c->fc->nb_streams-1];
529
    sc = st->priv_data;
530

    
531
    version = get_byte(pb);
532
    if (version > 1)
533
        return -1; /* unsupported */
534

    
535
    get_be24(pb); /* flags */
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

    
544
    sc->time_scale = get_be32(pb);
545
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
546

    
547
    lang = get_be16(pb); /* language */
548
    if (ff_mov_lang_to_iso639(lang, language))
549
        av_metadata_set(&st->metadata, "language", language);
550
    get_be16(pb); /* quality */
551

    
552
    return 0;
553
}
554

    
555
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
556
{
557
    int version = get_byte(pb); /* version */
558
    get_be24(pb); /* flags */
559

    
560
    if (version == 1) {
561
        get_be64(pb);
562
        get_be64(pb);
563
    } else {
564
        get_be32(pb); /* creation time */
565
        get_be32(pb); /* modification time */
566
    }
567
    c->time_scale = get_be32(pb); /* time scale */
568

    
569
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
570

    
571
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
572
    get_be32(pb); /* preferred scale */
573

    
574
    get_be16(pb); /* preferred volume */
575

    
576
    url_fskip(pb, 10); /* reserved */
577

    
578
    url_fskip(pb, 36); /* display matrix */
579

    
580
    get_be32(pb); /* preview time */
581
    get_be32(pb); /* preview duration */
582
    get_be32(pb); /* poster time */
583
    get_be32(pb); /* selection time */
584
    get_be32(pb); /* selection duration */
585
    get_be32(pb); /* current time */
586
    get_be32(pb); /* next track ID */
587

    
588
    return 0;
589
}
590

    
591
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
592
{
593
    AVStream *st;
594

    
595
    if (c->fc->nb_streams < 1)
596
        return 0;
597
    st = c->fc->streams[c->fc->nb_streams-1];
598

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

    
602
    // currently SVQ3 decoder expect full STSD header - so let's fake it
603
    // this should be fixed and just SMI header should be passed
604
    av_free(st->codec->extradata);
605
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
606
    if (!st->codec->extradata)
607
        return AVERROR(ENOMEM);
608
    st->codec->extradata_size = 0x5a + atom.size;
609
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
610
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
611
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
612
    return 0;
613
}
614

    
615
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
616
{
617
    AVStream *st;
618
    int little_endian;
619

    
620
    if (c->fc->nb_streams < 1)
621
        return 0;
622
    st = c->fc->streams[c->fc->nb_streams-1];
623

    
624
    little_endian = get_be16(pb);
625
    dprintf(c->fc, "enda %d\n", little_endian);
626
    if (little_endian == 1) {
627
        switch (st->codec->codec_id) {
628
        case CODEC_ID_PCM_S24BE:
629
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
630
            break;
631
        case CODEC_ID_PCM_S32BE:
632
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
633
            break;
634
        case CODEC_ID_PCM_F32BE:
635
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
636
            break;
637
        case CODEC_ID_PCM_F64BE:
638
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
639
            break;
640
        default:
641
            break;
642
        }
643
    }
644
    return 0;
645
}
646

    
647
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
648
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
649
{
650
    AVStream *st;
651
    uint64_t size;
652
    uint8_t *buf;
653

    
654
    if (c->fc->nb_streams < 1) // will happen with jp2 files
655
        return 0;
656
    st= c->fc->streams[c->fc->nb_streams-1];
657
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
658
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
659
        return -1;
660
    buf= av_realloc(st->codec->extradata, size);
661
    if(!buf)
662
        return -1;
663
    st->codec->extradata= buf;
664
    buf+= st->codec->extradata_size;
665
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
666
    AV_WB32(       buf    , atom.size + 8);
667
    AV_WL32(       buf + 4, atom.type);
668
    get_buffer(pb, buf + 8, atom.size);
669
    return 0;
670
}
671

    
672
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
673
{
674
    AVStream *st;
675

    
676
    if (c->fc->nb_streams < 1)
677
        return 0;
678
    st = c->fc->streams[c->fc->nb_streams-1];
679

    
680
    if((uint64_t)atom.size > (1<<30))
681
        return -1;
682

    
683
    if (st->codec->codec_id == CODEC_ID_QDM2) {
684
        // pass all frma atom to codec, needed at least for QDM2
685
        av_free(st->codec->extradata);
686
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
687
        if (!st->codec->extradata)
688
            return AVERROR(ENOMEM);
689
        st->codec->extradata_size = atom.size;
690
        get_buffer(pb, st->codec->extradata, atom.size);
691
    } else if (atom.size > 8) { /* to read frma, esds atoms */
692
        if (mov_read_default(c, pb, atom) < 0)
693
            return -1;
694
    } else
695
        url_fskip(pb, atom.size);
696
    return 0;
697
}
698

    
699
/**
700
 * This function reads atom content and puts data in extradata without tag
701
 * nor size unlike mov_read_extradata.
702
 */
703
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
704
{
705
    AVStream *st;
706

    
707
    if (c->fc->nb_streams < 1)
708
        return 0;
709
    st = c->fc->streams[c->fc->nb_streams-1];
710

    
711
    if((uint64_t)atom.size > (1<<30))
712
        return -1;
713

    
714
    av_free(st->codec->extradata);
715
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
716
    if (!st->codec->extradata)
717
        return AVERROR(ENOMEM);
718
    st->codec->extradata_size = atom.size;
719
    get_buffer(pb, st->codec->extradata, atom.size);
720
    return 0;
721
}
722

    
723
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
724
{
725
    AVStream *st;
726
    MOVStreamContext *sc;
727
    unsigned int i, entries;
728

    
729
    if (c->fc->nb_streams < 1)
730
        return 0;
731
    st = c->fc->streams[c->fc->nb_streams-1];
732
    sc = st->priv_data;
733

    
734
    get_byte(pb); /* version */
735
    get_be24(pb); /* flags */
736

    
737
    entries = get_be32(pb);
738

    
739
    if(entries >= UINT_MAX/sizeof(int64_t))
740
        return -1;
741

    
742
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
743
    if (!sc->chunk_offsets)
744
        return AVERROR(ENOMEM);
745
    sc->chunk_count = entries;
746

    
747
    if      (atom.type == MKTAG('s','t','c','o'))
748
        for(i=0; i<entries; i++)
749
            sc->chunk_offsets[i] = get_be32(pb);
750
    else if (atom.type == MKTAG('c','o','6','4'))
751
        for(i=0; i<entries; i++)
752
            sc->chunk_offsets[i] = get_be64(pb);
753
    else
754
        return -1;
755

    
756
    return 0;
757
}
758

    
759
/**
760
 * Compute codec id for 'lpcm' tag.
761
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
762
 */
763
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
764
{
765
    if (flags & 1) { // floating point
766
        if (flags & 2) { // big endian
767
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
768
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
769
        } else {
770
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
771
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
772
        }
773
    } else {
774
        if (flags & 2) {
775
            if      (bps == 8)
776
                // signed integer
777
                if (flags & 4)  return CODEC_ID_PCM_S8;
778
                else            return CODEC_ID_PCM_U8;
779
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
780
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
781
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
782
        } else {
783
            if      (bps == 8)
784
                if (flags & 4)  return CODEC_ID_PCM_S8;
785
                else            return CODEC_ID_PCM_U8;
786
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
787
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
788
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
789
        }
790
    }
791
    return CODEC_ID_NONE;
792
}
793

    
794
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
795
{
796
    AVStream *st;
797
    MOVStreamContext *sc;
798
    int j, entries, pseudo_stream_id;
799

    
800
    if (c->fc->nb_streams < 1)
801
        return 0;
802
    st = c->fc->streams[c->fc->nb_streams-1];
803
    sc = st->priv_data;
804

    
805
    get_byte(pb); /* version */
806
    get_be24(pb); /* flags */
807

    
808
    entries = get_be32(pb);
809

    
810
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
811
        //Parsing Sample description table
812
        enum CodecID id;
813
        int dref_id = 1;
814
        MOVAtom a = { 0, 0, 0 };
815
        int64_t start_pos = url_ftell(pb);
816
        int size = get_be32(pb); /* size */
817
        uint32_t format = get_le32(pb); /* data format */
818

    
819
        if (size >= 16) {
820
            get_be32(pb); /* reserved */
821
            get_be16(pb); /* reserved */
822
            dref_id = get_be16(pb);
823
        }
824

    
825
        if (st->codec->codec_tag &&
826
            st->codec->codec_tag != format &&
827
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
828
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
829
           ){
830
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
831
             * export it as a separate AVStream but this needs a few changes
832
             * in the MOV demuxer, patch welcome. */
833
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
834
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
835
            continue;
836
        }
837
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
838
        sc->dref_id= dref_id;
839

    
840
        st->codec->codec_tag = format;
841
        id = ff_codec_get_id(codec_movaudio_tags, format);
842
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
843
            id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
844

    
845
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
846
            st->codec->codec_type = CODEC_TYPE_AUDIO;
847
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
848
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
849
            id = ff_codec_get_id(codec_movvideo_tags, format);
850
            if (id <= 0)
851
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
852
            if (id > 0)
853
                st->codec->codec_type = CODEC_TYPE_VIDEO;
854
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
855
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
856
                if(id > 0)
857
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
858
            }
859
        }
860

    
861
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
862
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
863
                (format >> 24) & 0xff, st->codec->codec_type);
864

    
865
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
866
            uint8_t codec_name[32];
867
            unsigned int color_depth;
868
            int color_greyscale;
869

    
870
            st->codec->codec_id = id;
871
            get_be16(pb); /* version */
872
            get_be16(pb); /* revision level */
873
            get_be32(pb); /* vendor */
874
            get_be32(pb); /* temporal quality */
875
            get_be32(pb); /* spatial quality */
876

    
877
            st->codec->width = get_be16(pb); /* width */
878
            st->codec->height = get_be16(pb); /* height */
879

    
880
            get_be32(pb); /* horiz resolution */
881
            get_be32(pb); /* vert resolution */
882
            get_be32(pb); /* data size, always 0 */
883
            get_be16(pb); /* frames per samples */
884

    
885
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
886
            if (codec_name[0] <= 31) {
887
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
888
                st->codec->codec_name[codec_name[0]] = 0;
889
            }
890

    
891
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
892
            st->codec->color_table_id = get_be16(pb); /* colortable id */
893
            dprintf(c->fc, "depth %d, ctab id %d\n",
894
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
895
            /* figure out the palette situation */
896
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
897
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
898

    
899
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
900
            if ((color_depth == 2) || (color_depth == 4) ||
901
                (color_depth == 8)) {
902
                /* for palette traversal */
903
                unsigned int color_start, color_count, color_end;
904
                unsigned char r, g, b;
905

    
906
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
907
                if (color_greyscale) {
908
                    int color_index, color_dec;
909
                    /* compute the greyscale palette */
910
                    st->codec->bits_per_coded_sample = color_depth;
911
                    color_count = 1 << color_depth;
912
                    color_index = 255;
913
                    color_dec = 256 / (color_count - 1);
914
                    for (j = 0; j < color_count; j++) {
915
                        r = g = b = color_index;
916
                        st->codec->palctrl->palette[j] =
917
                            (r << 16) | (g << 8) | (b);
918
                        color_index -= color_dec;
919
                        if (color_index < 0)
920
                            color_index = 0;
921
                    }
922
                } else if (st->codec->color_table_id) {
923
                    const uint8_t *color_table;
924
                    /* if flag bit 3 is set, use the default palette */
925
                    color_count = 1 << color_depth;
926
                    if (color_depth == 2)
927
                        color_table = ff_qt_default_palette_4;
928
                    else if (color_depth == 4)
929
                        color_table = ff_qt_default_palette_16;
930
                    else
931
                        color_table = ff_qt_default_palette_256;
932

    
933
                    for (j = 0; j < color_count; j++) {
934
                        r = color_table[j * 3 + 0];
935
                        g = color_table[j * 3 + 1];
936
                        b = color_table[j * 3 + 2];
937
                        st->codec->palctrl->palette[j] =
938
                            (r << 16) | (g << 8) | (b);
939
                    }
940
                } else {
941
                    /* load the palette from the file */
942
                    color_start = get_be32(pb);
943
                    color_count = get_be16(pb);
944
                    color_end = get_be16(pb);
945
                    if ((color_start <= 255) &&
946
                        (color_end <= 255)) {
947
                        for (j = color_start; j <= color_end; j++) {
948
                            /* each R, G, or B component is 16 bits;
949
                             * only use the top 8 bits; skip alpha bytes
950
                             * up front */
951
                            get_byte(pb);
952
                            get_byte(pb);
953
                            r = get_byte(pb);
954
                            get_byte(pb);
955
                            g = get_byte(pb);
956
                            get_byte(pb);
957
                            b = get_byte(pb);
958
                            get_byte(pb);
959
                            st->codec->palctrl->palette[j] =
960
                                (r << 16) | (g << 8) | (b);
961
                        }
962
                    }
963
                }
964
                st->codec->palctrl->palette_changed = 1;
965
            }
966
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
967
            int bits_per_sample, flags;
968
            uint16_t version = get_be16(pb);
969

    
970
            st->codec->codec_id = id;
971
            get_be16(pb); /* revision level */
972
            get_be32(pb); /* vendor */
973

    
974
            st->codec->channels = get_be16(pb);             /* channel count */
975
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
976
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
977

    
978
            sc->audio_cid = get_be16(pb);
979
            get_be16(pb); /* packet size = 0 */
980

    
981
            st->codec->sample_rate = ((get_be32(pb) >> 16));
982

    
983
            //Read QT version 1 fields. In version 0 these do not exist.
984
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
985
            if(!c->isom) {
986
                if(version==1) {
987
                    sc->samples_per_frame = get_be32(pb);
988
                    get_be32(pb); /* bytes per packet */
989
                    sc->bytes_per_frame = get_be32(pb);
990
                    get_be32(pb); /* bytes per sample */
991
                } else if(version==2) {
992
                    get_be32(pb); /* sizeof struct only */
993
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
994
                    st->codec->channels = get_be32(pb);
995
                    get_be32(pb); /* always 0x7F000000 */
996
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
997
                    flags = get_be32(pb); /* lcpm format specific flag */
998
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
999
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1000
                    if (format == MKTAG('l','p','c','m'))
1001
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1002
                }
1003
            }
1004

    
1005
            switch (st->codec->codec_id) {
1006
            case CODEC_ID_PCM_S8:
1007
            case CODEC_ID_PCM_U8:
1008
                if (st->codec->bits_per_coded_sample == 16)
1009
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1010
                break;
1011
            case CODEC_ID_PCM_S16LE:
1012
            case CODEC_ID_PCM_S16BE:
1013
                if (st->codec->bits_per_coded_sample == 8)
1014
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1015
                else if (st->codec->bits_per_coded_sample == 24)
1016
                    st->codec->codec_id =
1017
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1018
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1019
                break;
1020
            /* set values for old format before stsd version 1 appeared */
1021
            case CODEC_ID_MACE3:
1022
                sc->samples_per_frame = 6;
1023
                sc->bytes_per_frame = 2*st->codec->channels;
1024
                break;
1025
            case CODEC_ID_MACE6:
1026
                sc->samples_per_frame = 6;
1027
                sc->bytes_per_frame = 1*st->codec->channels;
1028
                break;
1029
            case CODEC_ID_ADPCM_IMA_QT:
1030
                sc->samples_per_frame = 64;
1031
                sc->bytes_per_frame = 34*st->codec->channels;
1032
                break;
1033
            case CODEC_ID_GSM:
1034
                sc->samples_per_frame = 160;
1035
                sc->bytes_per_frame = 33;
1036
                break;
1037
            default:
1038
                break;
1039
            }
1040

    
1041
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1042
            if (bits_per_sample) {
1043
                st->codec->bits_per_coded_sample = bits_per_sample;
1044
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1045
            }
1046
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
1047
            // ttxt stsd contains display flags, justification, background
1048
            // color, fonts, and default styles, so fake an atom to read it
1049
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1050
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1051
                mov_read_glbl(c, pb, fake_atom);
1052
            st->codec->codec_id= id;
1053
            st->codec->width = sc->width;
1054
            st->codec->height = sc->height;
1055
        } else {
1056
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1057
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1058
        }
1059
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1060
        a.size = size - (url_ftell(pb) - start_pos);
1061
        if (a.size > 8) {
1062
            if (mov_read_default(c, pb, a) < 0)
1063
                return -1;
1064
        } else if (a.size > 0)
1065
            url_fskip(pb, a.size);
1066
    }
1067

    
1068
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1069
        st->codec->sample_rate= sc->time_scale;
1070

    
1071
    /* special codec parameters handling */
1072
    switch (st->codec->codec_id) {
1073
#if CONFIG_DV_DEMUXER
1074
    case CODEC_ID_DVAUDIO:
1075
        c->dv_fctx = avformat_alloc_context();
1076
        c->dv_demux = dv_init_demux(c->dv_fctx);
1077
        if (!c->dv_demux) {
1078
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1079
            return -1;
1080
        }
1081
        sc->dv_audio_container = 1;
1082
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1083
        break;
1084
#endif
1085
    /* no ifdef since parameters are always those */
1086
    case CODEC_ID_QCELP:
1087
        // force sample rate for qcelp when not stored in mov
1088
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1089
            st->codec->sample_rate = 8000;
1090
        st->codec->frame_size= 160;
1091
        st->codec->channels= 1; /* really needed */
1092
        break;
1093
    case CODEC_ID_AMR_NB:
1094
    case CODEC_ID_AMR_WB:
1095
        st->codec->frame_size= sc->samples_per_frame;
1096
        st->codec->channels= 1; /* really needed */
1097
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1098
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1099
            st->codec->sample_rate = 8000;
1100
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1101
            st->codec->sample_rate = 16000;
1102
        break;
1103
    case CODEC_ID_MP2:
1104
    case CODEC_ID_MP3:
1105
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1106
        st->need_parsing = AVSTREAM_PARSE_FULL;
1107
        break;
1108
    case CODEC_ID_GSM:
1109
    case CODEC_ID_ADPCM_MS:
1110
    case CODEC_ID_ADPCM_IMA_WAV:
1111
        st->codec->block_align = sc->bytes_per_frame;
1112
        break;
1113
    case CODEC_ID_ALAC:
1114
        if (st->codec->extradata_size == 36) {
1115
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1116
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1117
        }
1118
        break;
1119
    default:
1120
        break;
1121
    }
1122

    
1123
    return 0;
1124
}
1125

    
1126
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1127
{
1128
    AVStream *st;
1129
    MOVStreamContext *sc;
1130
    unsigned int i, entries;
1131

    
1132
    if (c->fc->nb_streams < 1)
1133
        return 0;
1134
    st = c->fc->streams[c->fc->nb_streams-1];
1135
    sc = st->priv_data;
1136

    
1137
    get_byte(pb); /* version */
1138
    get_be24(pb); /* flags */
1139

    
1140
    entries = get_be32(pb);
1141

    
1142
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1143

    
1144
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1145
        return -1;
1146
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1147
    if (!sc->stsc_data)
1148
        return AVERROR(ENOMEM);
1149
    sc->stsc_count = entries;
1150

    
1151
    for(i=0; i<entries; i++) {
1152
        sc->stsc_data[i].first = get_be32(pb);
1153
        sc->stsc_data[i].count = get_be32(pb);
1154
        sc->stsc_data[i].id = get_be32(pb);
1155
    }
1156
    return 0;
1157
}
1158

    
1159
static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1160
{
1161
    AVStream *st;
1162
    MOVStreamContext *sc;
1163
    unsigned i, entries;
1164

    
1165
    if (c->fc->nb_streams < 1)
1166
        return 0;
1167
    st = c->fc->streams[c->fc->nb_streams-1];
1168
    sc = st->priv_data;
1169

    
1170
    get_be32(pb); // version + flags
1171

    
1172
    entries = get_be32(pb);
1173
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1174
        return -1;
1175
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1176
    if (!sc->stps_data)
1177
        return AVERROR(ENOMEM);
1178
    sc->stps_count = entries;
1179

    
1180
    for (i = 0; i < entries; i++) {
1181
        sc->stps_data[i] = get_be32(pb);
1182
        //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1183
    }
1184

    
1185
    return 0;
1186
}
1187

    
1188
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1189
{
1190
    AVStream *st;
1191
    MOVStreamContext *sc;
1192
    unsigned int i, entries;
1193

    
1194
    if (c->fc->nb_streams < 1)
1195
        return 0;
1196
    st = c->fc->streams[c->fc->nb_streams-1];
1197
    sc = st->priv_data;
1198

    
1199
    get_byte(pb); /* version */
1200
    get_be24(pb); /* flags */
1201

    
1202
    entries = get_be32(pb);
1203

    
1204
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1205

    
1206
    if(entries >= UINT_MAX / sizeof(int))
1207
        return -1;
1208
    sc->keyframes = av_malloc(entries * sizeof(int));
1209
    if (!sc->keyframes)
1210
        return AVERROR(ENOMEM);
1211
    sc->keyframe_count = entries;
1212

    
1213
    for(i=0; i<entries; i++) {
1214
        sc->keyframes[i] = get_be32(pb);
1215
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1216
    }
1217
    return 0;
1218
}
1219

    
1220
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1221
{
1222
    AVStream *st;
1223
    MOVStreamContext *sc;
1224
    unsigned int i, entries, sample_size, field_size, num_bytes;
1225
    GetBitContext gb;
1226
    unsigned char* buf;
1227

    
1228
    if (c->fc->nb_streams < 1)
1229
        return 0;
1230
    st = c->fc->streams[c->fc->nb_streams-1];
1231
    sc = st->priv_data;
1232

    
1233
    get_byte(pb); /* version */
1234
    get_be24(pb); /* flags */
1235

    
1236
    if (atom.type == MKTAG('s','t','s','z')) {
1237
        sample_size = get_be32(pb);
1238
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1239
            sc->sample_size = sample_size;
1240
        field_size = 32;
1241
    } else {
1242
        sample_size = 0;
1243
        get_be24(pb); /* reserved */
1244
        field_size = get_byte(pb);
1245
    }
1246
    entries = get_be32(pb);
1247

    
1248
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1249

    
1250
    sc->sample_count = entries;
1251
    if (sample_size)
1252
        return 0;
1253

    
1254
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1255
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1256
        return -1;
1257
    }
1258

    
1259
    if(entries >= UINT_MAX / sizeof(int))
1260
        return -1;
1261
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1262
    if (!sc->sample_sizes)
1263
        return AVERROR(ENOMEM);
1264

    
1265
    num_bytes = (entries*field_size+4)>>3;
1266

    
1267
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1268
    if (!buf) {
1269
        av_freep(&sc->sample_sizes);
1270
        return AVERROR(ENOMEM);
1271
    }
1272

    
1273
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1274
        av_freep(&sc->sample_sizes);
1275
        av_free(buf);
1276
        return -1;
1277
    }
1278

    
1279
    init_get_bits(&gb, buf, 8*num_bytes);
1280

    
1281
    for(i=0; i<entries; i++)
1282
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1283

    
1284
    av_free(buf);
1285
    return 0;
1286
}
1287

    
1288
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1289
{
1290
    AVStream *st;
1291
    MOVStreamContext *sc;
1292
    unsigned int i, entries;
1293
    int64_t duration=0;
1294
    int64_t total_sample_count=0;
1295

    
1296
    if (c->fc->nb_streams < 1)
1297
        return 0;
1298
    st = c->fc->streams[c->fc->nb_streams-1];
1299
    sc = st->priv_data;
1300

    
1301
    get_byte(pb); /* version */
1302
    get_be24(pb); /* flags */
1303
    entries = get_be32(pb);
1304

    
1305
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1306

    
1307
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1308
        return -1;
1309
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1310
    if (!sc->stts_data)
1311
        return AVERROR(ENOMEM);
1312
    sc->stts_count = entries;
1313

    
1314
    for(i=0; i<entries; i++) {
1315
        int sample_duration;
1316
        int sample_count;
1317

    
1318
        sample_count=get_be32(pb);
1319
        sample_duration = get_be32(pb);
1320
        sc->stts_data[i].count= sample_count;
1321
        sc->stts_data[i].duration= sample_duration;
1322

    
1323
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1324

    
1325
        duration+=(int64_t)sample_duration*sample_count;
1326
        total_sample_count+=sample_count;
1327
    }
1328

    
1329
    st->nb_frames= total_sample_count;
1330
    if(duration)
1331
        st->duration= duration;
1332
    return 0;
1333
}
1334

    
1335
static int mov_read_cslg(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1336
{
1337
    AVStream *st;
1338
    MOVStreamContext *sc;
1339

    
1340
    if (c->fc->nb_streams < 1)
1341
        return 0;
1342
    st = c->fc->streams[c->fc->nb_streams-1];
1343
    sc = st->priv_data;
1344

    
1345
    get_be32(pb); // version + flags
1346

    
1347
    sc->dts_shift = get_be32(pb);
1348
    dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1349

    
1350
    get_be32(pb); // least dts to pts delta
1351
    get_be32(pb); // greatest dts to pts delta
1352
    get_be32(pb); // pts start
1353
    get_be32(pb); // pts end
1354

    
1355
    return 0;
1356
}
1357

    
1358
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1359
{
1360
    AVStream *st;
1361
    MOVStreamContext *sc;
1362
    unsigned int i, entries;
1363

    
1364
    if (c->fc->nb_streams < 1)
1365
        return 0;
1366
    st = c->fc->streams[c->fc->nb_streams-1];
1367
    sc = st->priv_data;
1368

    
1369
    get_byte(pb); /* version */
1370
    get_be24(pb); /* flags */
1371
    entries = get_be32(pb);
1372

    
1373
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1374

    
1375
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1376
        return -1;
1377
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1378
    if (!sc->ctts_data)
1379
        return AVERROR(ENOMEM);
1380
    sc->ctts_count = entries;
1381

    
1382
    for(i=0; i<entries; i++) {
1383
        int count    =get_be32(pb);
1384
        int duration =get_be32(pb);
1385

    
1386
        sc->ctts_data[i].count   = count;
1387
        sc->ctts_data[i].duration= duration;
1388
    }
1389
    return 0;
1390
}
1391

    
1392
static void mov_build_index(MOVContext *mov, AVStream *st)
1393
{
1394
    MOVStreamContext *sc = st->priv_data;
1395
    int64_t current_offset;
1396
    int64_t current_dts = 0;
1397
    unsigned int stts_index = 0;
1398
    unsigned int stsc_index = 0;
1399
    unsigned int stss_index = 0;
1400
    unsigned int stps_index = 0;
1401
    unsigned int i, j;
1402

    
1403
    /* adjust first dts according to edit list */
1404
    if (sc->time_offset) {
1405
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1406
        current_dts = -rescaled;
1407
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1408
            /* more than 16 frames delay, dts are likely wrong
1409
               this happens with files created by iMovie */
1410
            sc->wrong_dts = 1;
1411
            st->codec->has_b_frames = 1;
1412
        }
1413
    }
1414

    
1415
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1416
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1417
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1418
        unsigned int current_sample = 0;
1419
        unsigned int stts_sample = 0;
1420
        unsigned int sample_size;
1421
        unsigned int distance = 0;
1422
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1423

    
1424
        current_dts -= sc->dts_shift;
1425

    
1426
        st->nb_frames = sc->sample_count;
1427
        for (i = 0; i < sc->chunk_count; i++) {
1428
            current_offset = sc->chunk_offsets[i];
1429
            if (stsc_index + 1 < sc->stsc_count &&
1430
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1431
                stsc_index++;
1432
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1433
                int keyframe = 0;
1434
                if (current_sample >= sc->sample_count) {
1435
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1436
                    return;
1437
                }
1438

    
1439
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1440
                    keyframe = 1;
1441
                    if (stss_index + 1 < sc->keyframe_count)
1442
                        stss_index++;
1443
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1444
                    keyframe = 1;
1445
                    if (stps_index + 1 < sc->stps_count)
1446
                        stps_index++;
1447
                }
1448
                if (keyframe)
1449
                    distance = 0;
1450
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1451
                if(sc->pseudo_stream_id == -1 ||
1452
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1453
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1454
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1455
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1456
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1457
                            current_offset, current_dts, sample_size, distance, keyframe);
1458
                }
1459

    
1460
                current_offset += sample_size;
1461
                current_dts += sc->stts_data[stts_index].duration;
1462
                distance++;
1463
                stts_sample++;
1464
                current_sample++;
1465
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1466
                    stts_sample = 0;
1467
                    stts_index++;
1468
                }
1469
            }
1470
        }
1471
    } else {
1472
        for (i = 0; i < sc->chunk_count; i++) {
1473
            unsigned chunk_samples;
1474

    
1475
            current_offset = sc->chunk_offsets[i];
1476
            if (stsc_index + 1 < sc->stsc_count &&
1477
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1478
                stsc_index++;
1479
            chunk_samples = sc->stsc_data[stsc_index].count;
1480

    
1481
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1482
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1483
                return;
1484
            }
1485

    
1486
            while (chunk_samples > 0) {
1487
                unsigned size, samples;
1488

    
1489
                if (sc->samples_per_frame >= 160) { // gsm
1490
                    samples = sc->samples_per_frame;
1491
                    size = sc->bytes_per_frame;
1492
                } else {
1493
                    if (sc->samples_per_frame > 1) {
1494
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1495
                                        sc->samples_per_frame, chunk_samples);
1496
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1497
                    } else {
1498
                        samples = FFMIN(1024, chunk_samples);
1499
                        size = samples * sc->sample_size;
1500
                    }
1501
                }
1502

    
1503
                av_add_index_entry(st, current_offset, current_dts, size, 0, AVINDEX_KEYFRAME);
1504
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1505
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1506
                        size, samples);
1507

    
1508
                current_offset += size;
1509
                current_dts += samples;
1510
                chunk_samples -= samples;
1511
            }
1512
        }
1513
    }
1514
}
1515

    
1516
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1517
{
1518
    AVStream *st;
1519
    MOVStreamContext *sc;
1520
    int ret;
1521

    
1522
    st = av_new_stream(c->fc, c->fc->nb_streams);
1523
    if (!st) return AVERROR(ENOMEM);
1524
    sc = av_mallocz(sizeof(MOVStreamContext));
1525
    if (!sc) return AVERROR(ENOMEM);
1526

    
1527
    st->priv_data = sc;
1528
    st->codec->codec_type = CODEC_TYPE_DATA;
1529
    sc->ffindex = st->index;
1530

    
1531
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1532
        return ret;
1533

    
1534
    /* sanity checks */
1535
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1536
                            (!sc->sample_size && !sc->sample_count))) {
1537
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1538
               st->index);
1539
        return 0;
1540
    }
1541

    
1542
    if (!sc->time_scale)
1543
        sc->time_scale = c->time_scale;
1544

    
1545
    av_set_pts_info(st, 64, 1, sc->time_scale);
1546

    
1547
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1548
        !st->codec->frame_size && sc->stts_count == 1) {
1549
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1550
                                           st->codec->sample_rate, sc->time_scale);
1551
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1552
    }
1553

    
1554
    mov_build_index(c, st);
1555

    
1556
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1557
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1558
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1559
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1560
    } else
1561
        sc->pb = c->fc->pb;
1562

    
1563
    switch (st->codec->codec_id) {
1564
#if CONFIG_H261_DECODER
1565
    case CODEC_ID_H261:
1566
#endif
1567
#if CONFIG_H263_DECODER
1568
    case CODEC_ID_H263:
1569
#endif
1570
#if CONFIG_H264_DECODER
1571
    case CODEC_ID_H264:
1572
#endif
1573
#if CONFIG_MPEG4_DECODER
1574
    case CODEC_ID_MPEG4:
1575
#endif
1576
        st->codec->width = 0; /* let decoder init width/height */
1577
        st->codec->height= 0;
1578
        break;
1579
    }
1580

    
1581
    /* Do not need those anymore. */
1582
    av_freep(&sc->chunk_offsets);
1583
    av_freep(&sc->stsc_data);
1584
    av_freep(&sc->sample_sizes);
1585
    av_freep(&sc->keyframes);
1586
    av_freep(&sc->stts_data);
1587
    av_freep(&sc->stps_data);
1588

    
1589
    return 0;
1590
}
1591

    
1592
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1593
{
1594
    int ret;
1595
    c->itunes_metadata = 1;
1596
    ret = mov_read_default(c, pb, atom);
1597
    c->itunes_metadata = 0;
1598
    return ret;
1599
}
1600

    
1601
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1602
{
1603
    while (atom.size > 8) {
1604
        uint32_t tag = get_le32(pb);
1605
        atom.size -= 4;
1606
        if (tag == MKTAG('h','d','l','r')) {
1607
            url_fseek(pb, -8, SEEK_CUR);
1608
            atom.size += 8;
1609
            return mov_read_default(c, pb, atom);
1610
        }
1611
    }
1612
    return 0;
1613
}
1614

    
1615
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1616
{
1617
    int i;
1618
    int width;
1619
    int height;
1620
    int64_t disp_transform[2];
1621
    int display_matrix[3][2];
1622
    AVStream *st;
1623
    MOVStreamContext *sc;
1624
    int version;
1625

    
1626
    if (c->fc->nb_streams < 1)
1627
        return 0;
1628
    st = c->fc->streams[c->fc->nb_streams-1];
1629
    sc = st->priv_data;
1630

    
1631
    version = get_byte(pb);
1632
    get_be24(pb); /* flags */
1633
    /*
1634
    MOV_TRACK_ENABLED 0x0001
1635
    MOV_TRACK_IN_MOVIE 0x0002
1636
    MOV_TRACK_IN_PREVIEW 0x0004
1637
    MOV_TRACK_IN_POSTER 0x0008
1638
    */
1639

    
1640
    if (version == 1) {
1641
        get_be64(pb);
1642
        get_be64(pb);
1643
    } else {
1644
        get_be32(pb); /* creation time */
1645
        get_be32(pb); /* modification time */
1646
    }
1647
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1648
    get_be32(pb); /* reserved */
1649

    
1650
    /* highlevel (considering edits) duration in movie timebase */
1651
    (version == 1) ? get_be64(pb) : get_be32(pb);
1652
    get_be32(pb); /* reserved */
1653
    get_be32(pb); /* reserved */
1654

    
1655
    get_be16(pb); /* layer */
1656
    get_be16(pb); /* alternate group */
1657
    get_be16(pb); /* volume */
1658
    get_be16(pb); /* reserved */
1659

    
1660
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1661
    // they're kept in fixed point format through all calculations
1662
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1663
    for (i = 0; i < 3; i++) {
1664
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1665
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1666
        get_be32(pb);           // 2.30 fixed point (not used)
1667
    }
1668

    
1669
    width = get_be32(pb);       // 16.16 fixed point track width
1670
    height = get_be32(pb);      // 16.16 fixed point track height
1671
    sc->width = width >> 16;
1672
    sc->height = height >> 16;
1673

    
1674
    //transform the display width/height according to the matrix
1675
    // skip this if the display matrix is the default identity matrix
1676
    // to keep the same scale, use [width height 1<<16]
1677
    if (width && height &&
1678
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1679
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1680
        display_matrix[2][0]           || display_matrix[2][1])) {
1681
        for (i = 0; i < 2; i++)
1682
            disp_transform[i] =
1683
                (int64_t)  width  * display_matrix[0][i] +
1684
                (int64_t)  height * display_matrix[1][i] +
1685
                ((int64_t) display_matrix[2][i] << 16);
1686

    
1687
        //sample aspect ratio is new width/height divided by old width/height
1688
        st->sample_aspect_ratio = av_d2q(
1689
            ((double) disp_transform[0] * height) /
1690
            ((double) disp_transform[1] * width), INT_MAX);
1691
    }
1692
    return 0;
1693
}
1694

    
1695
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1696
{
1697
    MOVFragment *frag = &c->fragment;
1698
    MOVTrackExt *trex = NULL;
1699
    int flags, track_id, i;
1700

    
1701
    get_byte(pb); /* version */
1702
    flags = get_be24(pb);
1703

    
1704
    track_id = get_be32(pb);
1705
    if (!track_id)
1706
        return -1;
1707
    frag->track_id = track_id;
1708
    for (i = 0; i < c->trex_count; i++)
1709
        if (c->trex_data[i].track_id == frag->track_id) {
1710
            trex = &c->trex_data[i];
1711
            break;
1712
        }
1713
    if (!trex) {
1714
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1715
        return -1;
1716
    }
1717

    
1718
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1719
    else              frag->base_data_offset = frag->moof_offset;
1720
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1721
    else              frag->stsd_id          = trex->stsd_id;
1722

    
1723
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1724
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1725
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1726
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1727
    return 0;
1728
}
1729

    
1730
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1731
{
1732
    MOVTrackExt *trex;
1733

    
1734
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1735
        return -1;
1736
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1737
    if (!trex)
1738
        return AVERROR(ENOMEM);
1739
    c->trex_data = trex;
1740
    trex = &c->trex_data[c->trex_count++];
1741
    get_byte(pb); /* version */
1742
    get_be24(pb); /* flags */
1743
    trex->track_id = get_be32(pb);
1744
    trex->stsd_id  = get_be32(pb);
1745
    trex->duration = get_be32(pb);
1746
    trex->size     = get_be32(pb);
1747
    trex->flags    = get_be32(pb);
1748
    return 0;
1749
}
1750

    
1751
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1752
{
1753
    MOVFragment *frag = &c->fragment;
1754
    AVStream *st = NULL;
1755
    MOVStreamContext *sc;
1756
    uint64_t offset;
1757
    int64_t dts;
1758
    int data_offset = 0;
1759
    unsigned entries, first_sample_flags = frag->flags;
1760
    int flags, distance, i;
1761

    
1762
    for (i = 0; i < c->fc->nb_streams; i++) {
1763
        if (c->fc->streams[i]->id == frag->track_id) {
1764
            st = c->fc->streams[i];
1765
            break;
1766
        }
1767
    }
1768
    if (!st) {
1769
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1770
        return -1;
1771
    }
1772
    sc = st->priv_data;
1773
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1774
        return 0;
1775
    get_byte(pb); /* version */
1776
    flags = get_be24(pb);
1777
    entries = get_be32(pb);
1778
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1779
    if (flags & 0x001) data_offset        = get_be32(pb);
1780
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1781
    if (flags & 0x800) {
1782
        MOVStts *ctts_data;
1783
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1784
            return -1;
1785
        ctts_data = av_realloc(sc->ctts_data,
1786
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1787
        if (!ctts_data)
1788
            return AVERROR(ENOMEM);
1789
        sc->ctts_data = ctts_data;
1790
    }
1791
    dts = st->duration;
1792
    offset = frag->base_data_offset + data_offset;
1793
    distance = 0;
1794
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1795
    for (i = 0; i < entries; i++) {
1796
        unsigned sample_size = frag->size;
1797
        int sample_flags = i ? frag->flags : first_sample_flags;
1798
        unsigned sample_duration = frag->duration;
1799
        int keyframe;
1800

    
1801
        if (flags & 0x100) sample_duration = get_be32(pb);
1802
        if (flags & 0x200) sample_size     = get_be32(pb);
1803
        if (flags & 0x400) sample_flags    = get_be32(pb);
1804
        if (flags & 0x800) {
1805
            sc->ctts_data[sc->ctts_count].count = 1;
1806
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1807
            sc->ctts_count++;
1808
        }
1809
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1810
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1811
            distance = 0;
1812
        av_add_index_entry(st, offset, dts, sample_size, distance,
1813
                           keyframe ? AVINDEX_KEYFRAME : 0);
1814
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1815
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1816
                offset, dts, sample_size, distance, keyframe);
1817
        distance++;
1818
        dts += sample_duration;
1819
        offset += sample_size;
1820
    }
1821
    frag->moof_offset = offset;
1822
    st->duration = dts;
1823
    return 0;
1824
}
1825

    
1826
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1827
/* like the files created with Adobe Premiere 5.0, for samples see */
1828
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1829
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1830
{
1831
    int err;
1832

    
1833
    if (atom.size < 8)
1834
        return 0; /* continue */
1835
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1836
        url_fskip(pb, atom.size - 4);
1837
        return 0;
1838
    }
1839
    atom.type = get_le32(pb);
1840
    atom.offset += 8;
1841
    atom.size -= 8;
1842
    if (atom.type != MKTAG('m','d','a','t')) {
1843
        url_fskip(pb, atom.size);
1844
        return 0;
1845
    }
1846
    err = mov_read_mdat(c, pb, atom);
1847
    return err;
1848
}
1849

    
1850
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1851
{
1852
#if CONFIG_ZLIB
1853
    ByteIOContext ctx;
1854
    uint8_t *cmov_data;
1855
    uint8_t *moov_data; /* uncompressed data */
1856
    long cmov_len, moov_len;
1857
    int ret = -1;
1858

    
1859
    get_be32(pb); /* dcom atom */
1860
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1861
        return -1;
1862
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1863
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1864
        return -1;
1865
    }
1866
    get_be32(pb); /* cmvd atom */
1867
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1868
        return -1;
1869
    moov_len = get_be32(pb); /* uncompressed size */
1870
    cmov_len = atom.size - 6 * 4;
1871

    
1872
    cmov_data = av_malloc(cmov_len);
1873
    if (!cmov_data)
1874
        return AVERROR(ENOMEM);
1875
    moov_data = av_malloc(moov_len);
1876
    if (!moov_data) {
1877
        av_free(cmov_data);
1878
        return AVERROR(ENOMEM);
1879
    }
1880
    get_buffer(pb, cmov_data, cmov_len);
1881
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1882
        goto free_and_return;
1883
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1884
        goto free_and_return;
1885
    atom.type = MKTAG('m','o','o','v');
1886
    atom.offset = 0;
1887
    atom.size = moov_len;
1888
#ifdef DEBUG
1889
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1890
#endif
1891
    ret = mov_read_default(c, &ctx, atom);
1892
free_and_return:
1893
    av_free(moov_data);
1894
    av_free(cmov_data);
1895
    return ret;
1896
#else
1897
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1898
    return -1;
1899
#endif
1900
}
1901

    
1902
/* edit list atom */
1903
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1904
{
1905
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1906
    int i, edit_count;
1907

    
1908
    get_byte(pb); /* version */
1909
    get_be24(pb); /* flags */
1910
    edit_count = get_be32(pb); /* entries */
1911

    
1912
    if((uint64_t)edit_count*12+8 > atom.size)
1913
        return -1;
1914

    
1915
    for(i=0; i<edit_count; i++){
1916
        int time;
1917
        int duration = get_be32(pb); /* Track duration */
1918
        time = get_be32(pb); /* Media time */
1919
        get_be32(pb); /* Media rate */
1920
        if (i == 0 && time >= -1) {
1921
            sc->time_offset = time != -1 ? time : -duration;
1922
        }
1923
    }
1924

    
1925
    if(edit_count > 1)
1926
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1927
               "a/v desync might occur, patch welcome\n");
1928

    
1929
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1930
    return 0;
1931
}
1932

    
1933
static const MOVParseTableEntry mov_default_parse_table[] = {
1934
{ MKTAG('a','v','s','s'), mov_read_extradata },
1935
{ MKTAG('c','o','6','4'), mov_read_stco },
1936
{ MKTAG('c','s','l','g'), mov_read_cslg },
1937
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1938
{ MKTAG('d','i','n','f'), mov_read_default },
1939
{ MKTAG('d','r','e','f'), mov_read_dref },
1940
{ MKTAG('e','d','t','s'), mov_read_default },
1941
{ MKTAG('e','l','s','t'), mov_read_elst },
1942
{ MKTAG('e','n','d','a'), mov_read_enda },
1943
{ MKTAG('f','i','e','l'), mov_read_extradata },
1944
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1945
{ MKTAG('g','l','b','l'), mov_read_glbl },
1946
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1947
{ MKTAG('i','l','s','t'), mov_read_ilst },
1948
{ MKTAG('j','p','2','h'), mov_read_extradata },
1949
{ MKTAG('m','d','a','t'), mov_read_mdat },
1950
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1951
{ MKTAG('m','d','i','a'), mov_read_default },
1952
{ MKTAG('m','e','t','a'), mov_read_meta },
1953
{ MKTAG('m','i','n','f'), mov_read_default },
1954
{ MKTAG('m','o','o','f'), mov_read_moof },
1955
{ MKTAG('m','o','o','v'), mov_read_moov },
1956
{ MKTAG('m','v','e','x'), mov_read_default },
1957
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1958
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1959
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1960
{ MKTAG('a','v','c','C'), mov_read_glbl },
1961
{ MKTAG('p','a','s','p'), mov_read_pasp },
1962
{ MKTAG('s','t','b','l'), mov_read_default },
1963
{ MKTAG('s','t','c','o'), mov_read_stco },
1964
{ MKTAG('s','t','p','s'), mov_read_stps },
1965
{ MKTAG('s','t','s','c'), mov_read_stsc },
1966
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1967
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1968
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1969
{ MKTAG('s','t','t','s'), mov_read_stts },
1970
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
1971
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1972
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1973
{ MKTAG('t','r','a','k'), mov_read_trak },
1974
{ MKTAG('t','r','a','f'), mov_read_default },
1975
{ MKTAG('t','r','e','x'), mov_read_trex },
1976
{ MKTAG('t','r','u','n'), mov_read_trun },
1977
{ MKTAG('u','d','t','a'), mov_read_default },
1978
{ MKTAG('w','a','v','e'), mov_read_wave },
1979
{ MKTAG('e','s','d','s'), mov_read_esds },
1980
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1981
{ MKTAG('c','m','o','v'), mov_read_cmov },
1982
{ 0, NULL }
1983
};
1984

    
1985
static int mov_probe(AVProbeData *p)
1986
{
1987
    unsigned int offset;
1988
    uint32_t tag;
1989
    int score = 0;
1990

    
1991
    /* check file header */
1992
    offset = 0;
1993
    for(;;) {
1994
        /* ignore invalid offset */
1995
        if ((offset + 8) > (unsigned int)p->buf_size)
1996
            return score;
1997
        tag = AV_RL32(p->buf + offset + 4);
1998
        switch(tag) {
1999
        /* check for obvious tags */
2000
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2001
        case MKTAG('m','o','o','v'):
2002
        case MKTAG('m','d','a','t'):
2003
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2004
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2005
        case MKTAG('f','t','y','p'):
2006
            return AVPROBE_SCORE_MAX;
2007
        /* those are more common words, so rate then a bit less */
2008
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2009
        case MKTAG('w','i','d','e'):
2010
        case MKTAG('f','r','e','e'):
2011
        case MKTAG('j','u','n','k'):
2012
        case MKTAG('p','i','c','t'):
2013
            return AVPROBE_SCORE_MAX - 5;
2014
        case MKTAG(0x82,0x82,0x7f,0x7d):
2015
        case MKTAG('s','k','i','p'):
2016
        case MKTAG('u','u','i','d'):
2017
        case MKTAG('p','r','f','l'):
2018
            offset = AV_RB32(p->buf+offset) + offset;
2019
            /* if we only find those cause probedata is too small at least rate them */
2020
            score = AVPROBE_SCORE_MAX - 50;
2021
            break;
2022
        default:
2023
            /* unrecognized tag */
2024
            return score;
2025
        }
2026
    }
2027
    return score;
2028
}
2029

    
2030
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2031
{
2032
    MOVContext *mov = s->priv_data;
2033
    ByteIOContext *pb = s->pb;
2034
    int err;
2035
    MOVAtom atom = { 0, 0, 0 };
2036

    
2037
    mov->fc = s;
2038
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2039
    if(!url_is_streamed(pb))
2040
        atom.size = url_fsize(pb);
2041
    else
2042
        atom.size = INT64_MAX;
2043

    
2044
    /* check MOV header */
2045
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2046
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2047
        return err;
2048
    }
2049
    if (!mov->found_moov) {
2050
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2051
        return -1;
2052
    }
2053
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2054

    
2055
    return 0;
2056
}
2057

    
2058
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2059
{
2060
    MOVContext *mov = s->priv_data;
2061
    MOVStreamContext *sc = 0;
2062
    AVIndexEntry *sample = 0;
2063
    int64_t best_dts = INT64_MAX;
2064
    int i, ret;
2065
 retry:
2066
    for (i = 0; i < s->nb_streams; i++) {
2067
        AVStream *st = s->streams[i];
2068
        MOVStreamContext *msc = st->priv_data;
2069
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
2070
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
2071
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2072
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2073
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2074
                (!url_is_streamed(s->pb) &&
2075
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2076
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2077
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2078
                sample = current_sample;
2079
                best_dts = dts;
2080
                sc = msc;
2081
            }
2082
        }
2083
    }
2084
    if (!sample) {
2085
        mov->found_mdat = 0;
2086
        if (!url_is_streamed(s->pb) ||
2087
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
2088
            url_feof(s->pb))
2089
            return AVERROR_EOF;
2090
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2091
        goto retry;
2092
    }
2093
    /* must be done just before reading, to avoid infinite loop on sample */
2094
    sc->current_sample++;
2095
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2096
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2097
               sc->ffindex, sample->pos);
2098
        return -1;
2099
    }
2100
    ret = av_get_packet(sc->pb, pkt, sample->size);
2101
    if (ret < 0)
2102
        return ret;
2103
#if CONFIG_DV_DEMUXER
2104
    if (mov->dv_demux && sc->dv_audio_container) {
2105
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2106
        av_free(pkt->data);
2107
        pkt->size = 0;
2108
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
2109
            return -1;
2110
    }
2111
#endif
2112
    pkt->stream_index = sc->ffindex;
2113
    pkt->dts = sample->timestamp;
2114
    if (sc->ctts_data) {
2115
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2116
        /* update ctts context */
2117
        sc->ctts_sample++;
2118
        if (sc->ctts_index < sc->ctts_count &&
2119
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2120
            sc->ctts_index++;
2121
            sc->ctts_sample = 0;
2122
        }
2123
        if (sc->wrong_dts)
2124
            pkt->dts = AV_NOPTS_VALUE;
2125
    } else {
2126
        AVStream *st = s->streams[sc->ffindex];
2127
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2128
            st->index_entries[sc->current_sample].timestamp : st->duration;
2129
        pkt->duration = next_dts - pkt->dts;
2130
        pkt->pts = pkt->dts;
2131
    }
2132
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
2133
    pkt->pos = sample->pos;
2134
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2135
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2136
    return 0;
2137
}
2138

    
2139
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
2140
{
2141
    MOVStreamContext *sc = st->priv_data;
2142
    int sample, time_sample;
2143
    int i;
2144

    
2145
    sample = av_index_search_timestamp(st, timestamp, flags);
2146
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2147
    if (sample < 0) /* not sure what to do */
2148
        return -1;
2149
    sc->current_sample = sample;
2150
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
2151
    /* adjust ctts index */
2152
    if (sc->ctts_data) {
2153
        time_sample = 0;
2154
        for (i = 0; i < sc->ctts_count; i++) {
2155
            int next = time_sample + sc->ctts_data[i].count;
2156
            if (next > sc->current_sample) {
2157
                sc->ctts_index = i;
2158
                sc->ctts_sample = sc->current_sample - time_sample;
2159
                break;
2160
            }
2161
            time_sample = next;
2162
        }
2163
    }
2164
    return sample;
2165
}
2166

    
2167
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2168
{
2169
    AVStream *st;
2170
    int64_t seek_timestamp, timestamp;
2171
    int sample;
2172
    int i;
2173

    
2174
    if (stream_index >= s->nb_streams)
2175
        return -1;
2176
    if (sample_time < 0)
2177
        sample_time = 0;
2178

    
2179
    st = s->streams[stream_index];
2180
    sample = mov_seek_stream(st, sample_time, flags);
2181
    if (sample < 0)
2182
        return -1;
2183

    
2184
    /* adjust seek timestamp to found sample timestamp */
2185
    seek_timestamp = st->index_entries[sample].timestamp;
2186

    
2187
    for (i = 0; i < s->nb_streams; i++) {
2188
        st = s->streams[i];
2189
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2190
            continue;
2191

    
2192
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2193
        mov_seek_stream(st, timestamp, flags);
2194
    }
2195
    return 0;
2196
}
2197

    
2198
static int mov_read_close(AVFormatContext *s)
2199
{
2200
    MOVContext *mov = s->priv_data;
2201
    int i, j;
2202

    
2203
    for (i = 0; i < s->nb_streams; i++) {
2204
        AVStream *st = s->streams[i];
2205
        MOVStreamContext *sc = st->priv_data;
2206

    
2207
        av_freep(&sc->ctts_data);
2208
        for (j = 0; j < sc->drefs_count; j++)
2209
            av_freep(&sc->drefs[j].path);
2210
        av_freep(&sc->drefs);
2211
        if (sc->pb && sc->pb != s->pb)
2212
            url_fclose(sc->pb);
2213

    
2214
        av_freep(&st->codec->palctrl);
2215
    }
2216

    
2217
    if (mov->dv_demux) {
2218
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2219
            av_freep(&mov->dv_fctx->streams[i]->codec);
2220
            av_freep(&mov->dv_fctx->streams[i]);
2221
        }
2222
        av_freep(&mov->dv_fctx);
2223
        av_freep(&mov->dv_demux);
2224
    }
2225

    
2226
    av_freep(&mov->trex_data);
2227

    
2228
    return 0;
2229
}
2230

    
2231
AVInputFormat mov_demuxer = {
2232
    "mov,mp4,m4a,3gp,3g2,mj2",
2233
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2234
    sizeof(MOVContext),
2235
    mov_probe,
2236
    mov_read_header,
2237
    mov_read_packet,
2238
    mov_read_close,
2239
    mov_read_seek,
2240
};