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ffmpeg / libavformat / mov.c @ b24bbbb4

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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"
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#include "riff.h"
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#include "isom.h"
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#include "libavcodec/mpeg4audio.h"
35
#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/
52
 * 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:
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  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
88
    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 = c->fc->streams[c->fc->nb_streams-1];
248
    MOVStreamContext *sc = st->priv_data;
249
    int entries, i, j;
250

    
251
    get_be32(pb); // version + flags
252
    entries = get_be32(pb);
253
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
254
        return -1;
255
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
256
    if (!sc->drefs)
257
        return AVERROR(ENOMEM);
258
    sc->drefs_count = entries;
259

    
260
    for (i = 0; i < sc->drefs_count; i++) {
261
        MOVDref *dref = &sc->drefs[i];
262
        uint32_t size = get_be32(pb);
263
        int64_t next = url_ftell(pb) + size - 4;
264

    
265
        dref->type = get_le32(pb);
266
        get_be32(pb); // version + flags
267
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
268

    
269
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
270
            /* macintosh alias record */
271
            uint16_t volume_len, len;
272
            char volume[28];
273
            int16_t type;
274

    
275
            url_fskip(pb, 10);
276

    
277
            volume_len = get_byte(pb);
278
            volume_len = FFMIN(volume_len, 27);
279
            get_buffer(pb, volume, 27);
280
            volume[volume_len] = 0;
281
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
282

    
283
            url_fskip(pb, 112);
284

    
285
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
286
                type = get_be16(pb);
287
                len = get_be16(pb);
288
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
289
                if (len&1)
290
                    len += 1;
291
                if (type == 2) { // absolute path
292
                    av_free(dref->path);
293
                    dref->path = av_mallocz(len+1);
294
                    if (!dref->path)
295
                        return AVERROR(ENOMEM);
296
                    get_buffer(pb, dref->path, len);
297
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
298
                        len -= volume_len;
299
                        memmove(dref->path, dref->path+volume_len, len);
300
                        dref->path[len] = 0;
301
                    }
302
                    for (j = 0; j < len; j++)
303
                        if (dref->path[j] == ':')
304
                            dref->path[j] = '/';
305
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
306
                } else
307
                    url_fskip(pb, len);
308
            }
309
        }
310
        url_fseek(pb, next, SEEK_SET);
311
    }
312
    return 0;
313
}
314

    
315
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
316
{
317
    AVStream *st;
318
    uint32_t type;
319
    uint32_t ctype;
320

    
321
    if (c->fc->nb_streams < 1) // meta before first trak
322
        return 0;
323

    
324
    st = c->fc->streams[c->fc->nb_streams-1];
325

    
326
    get_byte(pb); /* version */
327
    get_be24(pb); /* flags */
328

    
329
    /* component type */
330
    ctype = get_le32(pb);
331
    type = get_le32(pb); /* component subtype */
332

    
333
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
334
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
335

    
336
    if     (type == MKTAG('v','i','d','e'))
337
        st->codec->codec_type = CODEC_TYPE_VIDEO;
338
    else if(type == MKTAG('s','o','u','n'))
339
        st->codec->codec_type = CODEC_TYPE_AUDIO;
340
    else if(type == MKTAG('m','1','a',' '))
341
        st->codec->codec_id = CODEC_ID_MP2;
342
    else if(type == MKTAG('s','u','b','p'))
343
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
344

    
345
    get_be32(pb); /* component  manufacture */
346
    get_be32(pb); /* component flags */
347
    get_be32(pb); /* component flags mask */
348

    
349
    if(atom.size <= 24)
350
        return 0; /* nothing left to read */
351

    
352
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
353
    return 0;
354
}
355

    
356
static int mp4_read_descr_len(ByteIOContext *pb)
357
{
358
    int len = 0;
359
    int count = 4;
360
    while (count--) {
361
        int c = get_byte(pb);
362
        len = (len << 7) | (c & 0x7f);
363
        if (!(c & 0x80))
364
            break;
365
    }
366
    return len;
367
}
368

    
369
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
370
{
371
    int len;
372
    *tag = get_byte(pb);
373
    len = mp4_read_descr_len(pb);
374
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
375
    return len;
376
}
377

    
378
#define MP4ESDescrTag                   0x03
379
#define MP4DecConfigDescrTag            0x04
380
#define MP4DecSpecificDescrTag          0x05
381

    
382
static const AVCodecTag mp4_audio_types[] = {
383
    { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
384
    { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
385
    { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
386
    { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
387
    { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
388
    { CODEC_ID_NONE,   AOT_NULL },
389
};
390

    
391
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
392
{
393
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
394
    int tag, len;
395

    
396
    get_be32(pb); /* version + flags */
397
    len = mp4_read_descr(c, pb, &tag);
398
    if (tag == MP4ESDescrTag) {
399
        get_be16(pb); /* ID */
400
        get_byte(pb); /* priority */
401
    } else
402
        get_be16(pb); /* ID */
403

    
404
    len = mp4_read_descr(c, pb, &tag);
405
    if (tag == MP4DecConfigDescrTag) {
406
        int object_type_id = get_byte(pb);
407
        get_byte(pb); /* stream type */
408
        get_be24(pb); /* buffer size db */
409
        get_be32(pb); /* max bitrate */
410
        get_be32(pb); /* avg bitrate */
411

    
412
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
413
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
414
        len = mp4_read_descr(c, pb, &tag);
415
        if (tag == MP4DecSpecificDescrTag) {
416
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
417
            if((uint64_t)len > (1<<30))
418
                return -1;
419
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
420
            if (!st->codec->extradata)
421
                return AVERROR(ENOMEM);
422
            get_buffer(pb, st->codec->extradata, len);
423
            st->codec->extradata_size = len;
424
            if (st->codec->codec_id == CODEC_ID_AAC) {
425
                MPEG4AudioConfig cfg;
426
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
427
                                         st->codec->extradata_size);
428
                if (cfg.chan_config > 7)
429
                    return -1;
430
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
431
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
432
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
433
                else
434
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
435
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
436
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
437
                        cfg.object_type, cfg.ext_object_type,
438
                        cfg.sample_rate, cfg.ext_sample_rate);
439
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
440
                                                         cfg.object_type)))
441
                    st->codec->codec_id = CODEC_ID_AAC;
442
            }
443
        }
444
    }
445
    return 0;
446
}
447

    
448
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
449
{
450
    const int num = get_be32(pb);
451
    const int den = get_be32(pb);
452
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
453
    if (den != 0) {
454
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
455
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
456
            av_log(c->fc, AV_LOG_WARNING,
457
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
458
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
459
        st->sample_aspect_ratio.num = num;
460
        st->sample_aspect_ratio.den = den;
461
    }
462
    return 0;
463
}
464

    
465
/* this atom contains actual media data */
466
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
467
{
468
    if(atom.size == 0) /* wrong one (MP4) */
469
        return 0;
470
    c->found_mdat=1;
471
    return 0; /* now go for moov */
472
}
473

    
474
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
475
{
476
    uint32_t type = get_le32(pb);
477

    
478
    if (type != MKTAG('q','t',' ',' '))
479
        c->isom = 1;
480
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
481
    get_be32(pb); /* minor version */
482
    url_fskip(pb, atom.size - 8);
483
    return 0;
484
}
485

    
486
/* this atom should contain all header atoms */
487
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
488
{
489
    if (mov_read_default(c, pb, atom) < 0)
490
        return -1;
491
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
492
    /* so we don't parse the whole file if over a network */
493
    c->found_moov=1;
494
    return 0; /* now go for mdat */
495
}
496

    
497
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
498
{
499
    c->fragment.moof_offset = url_ftell(pb) - 8;
500
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
501
    return mov_read_default(c, pb, atom);
502
}
503

    
504
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
505
{
506
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
507
    MOVStreamContext *sc = st->priv_data;
508
    int version = get_byte(pb);
509
    char language[4] = {0};
510
    unsigned lang;
511

    
512
    if (version > 1)
513
        return -1; /* unsupported */
514

    
515
    get_be24(pb); /* flags */
516
    if (version == 1) {
517
        get_be64(pb);
518
        get_be64(pb);
519
    } else {
520
        get_be32(pb); /* creation time */
521
        get_be32(pb); /* modification time */
522
    }
523

    
524
    sc->time_scale = get_be32(pb);
525
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
526

    
527
    lang = get_be16(pb); /* language */
528
    if (ff_mov_lang_to_iso639(lang, language))
529
        av_metadata_set(&st->metadata, "language", language);
530
    get_be16(pb); /* quality */
531

    
532
    return 0;
533
}
534

    
535
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
536
{
537
    int version = get_byte(pb); /* version */
538
    get_be24(pb); /* flags */
539

    
540
    if (version == 1) {
541
        get_be64(pb);
542
        get_be64(pb);
543
    } else {
544
        get_be32(pb); /* creation time */
545
        get_be32(pb); /* modification time */
546
    }
547
    c->time_scale = get_be32(pb); /* time scale */
548

    
549
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
550

    
551
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
552
    get_be32(pb); /* preferred scale */
553

    
554
    get_be16(pb); /* preferred volume */
555

    
556
    url_fskip(pb, 10); /* reserved */
557

    
558
    url_fskip(pb, 36); /* display matrix */
559

    
560
    get_be32(pb); /* preview time */
561
    get_be32(pb); /* preview duration */
562
    get_be32(pb); /* poster time */
563
    get_be32(pb); /* selection time */
564
    get_be32(pb); /* selection duration */
565
    get_be32(pb); /* current time */
566
    get_be32(pb); /* next track ID */
567

    
568
    return 0;
569
}
570

    
571
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
572
{
573
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
574

    
575
    if((uint64_t)atom.size > (1<<30))
576
        return -1;
577

    
578
    // currently SVQ3 decoder expect full STSD header - so let's fake it
579
    // this should be fixed and just SMI header should be passed
580
    av_free(st->codec->extradata);
581
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
582
    if (!st->codec->extradata)
583
        return AVERROR(ENOMEM);
584
    st->codec->extradata_size = 0x5a + atom.size;
585
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
586
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
587
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
588
    return 0;
589
}
590

    
591
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
592
{
593
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
594
    int little_endian = get_be16(pb);
595

    
596
    dprintf(c->fc, "enda %d\n", little_endian);
597
    if (little_endian == 1) {
598
        switch (st->codec->codec_id) {
599
        case CODEC_ID_PCM_S24BE:
600
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
601
            break;
602
        case CODEC_ID_PCM_S32BE:
603
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
604
            break;
605
        case CODEC_ID_PCM_F32BE:
606
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
607
            break;
608
        case CODEC_ID_PCM_F64BE:
609
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
610
            break;
611
        default:
612
            break;
613
        }
614
    }
615
    return 0;
616
}
617

    
618
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
619
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
620
{
621
    AVStream *st;
622
    uint64_t size;
623
    uint8_t *buf;
624

    
625
    if (c->fc->nb_streams < 1) // will happen with jp2 files
626
        return 0;
627
    st= c->fc->streams[c->fc->nb_streams-1];
628
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
629
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
630
        return -1;
631
    buf= av_realloc(st->codec->extradata, size);
632
    if(!buf)
633
        return -1;
634
    st->codec->extradata= buf;
635
    buf+= st->codec->extradata_size;
636
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
637
    AV_WB32(       buf    , atom.size + 8);
638
    AV_WL32(       buf + 4, atom.type);
639
    get_buffer(pb, buf + 8, atom.size);
640
    return 0;
641
}
642

    
643
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
644
{
645
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
646

    
647
    if((uint64_t)atom.size > (1<<30))
648
        return -1;
649

    
650
    if (st->codec->codec_id == CODEC_ID_QDM2) {
651
        // pass all frma atom to codec, needed at least for QDM2
652
        av_free(st->codec->extradata);
653
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
654
        if (!st->codec->extradata)
655
            return AVERROR(ENOMEM);
656
        st->codec->extradata_size = atom.size;
657
        get_buffer(pb, st->codec->extradata, atom.size);
658
    } else if (atom.size > 8) { /* to read frma, esds atoms */
659
        if (mov_read_default(c, pb, atom) < 0)
660
            return -1;
661
    } else
662
        url_fskip(pb, atom.size);
663
    return 0;
664
}
665

    
666
/**
667
 * This function reads atom content and puts data in extradata without tag
668
 * nor size unlike mov_read_extradata.
669
 */
670
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
671
{
672
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
673

    
674
    if((uint64_t)atom.size > (1<<30))
675
        return -1;
676

    
677
    av_free(st->codec->extradata);
678
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
679
    if (!st->codec->extradata)
680
        return AVERROR(ENOMEM);
681
    st->codec->extradata_size = atom.size;
682
    get_buffer(pb, st->codec->extradata, atom.size);
683
    return 0;
684
}
685

    
686
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
687
{
688
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
689
    MOVStreamContext *sc = st->priv_data;
690
    unsigned int i, entries;
691

    
692
    get_byte(pb); /* version */
693
    get_be24(pb); /* flags */
694

    
695
    entries = get_be32(pb);
696

    
697
    if(entries >= UINT_MAX/sizeof(int64_t))
698
        return -1;
699

    
700
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
701
    if (!sc->chunk_offsets)
702
        return AVERROR(ENOMEM);
703
    sc->chunk_count = entries;
704

    
705
    if      (atom.type == MKTAG('s','t','c','o'))
706
        for(i=0; i<entries; i++)
707
            sc->chunk_offsets[i] = get_be32(pb);
708
    else if (atom.type == MKTAG('c','o','6','4'))
709
        for(i=0; i<entries; i++)
710
            sc->chunk_offsets[i] = get_be64(pb);
711
    else
712
        return -1;
713

    
714
    return 0;
715
}
716

    
717
/**
718
 * Compute codec id for 'lpcm' tag.
719
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
720
 */
721
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
722
{
723
    if (flags & 1) { // floating point
724
        if (flags & 2) { // big endian
725
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
726
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
727
        } else {
728
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
729
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
730
        }
731
    } else {
732
        if (flags & 2) {
733
            if      (bps == 8)
734
                // signed integer
735
                if (flags & 4)  return CODEC_ID_PCM_S8;
736
                else            return CODEC_ID_PCM_U8;
737
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
738
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
739
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
740
        } else {
741
            if      (bps == 8)
742
                if (flags & 4)  return CODEC_ID_PCM_S8;
743
                else            return CODEC_ID_PCM_U8;
744
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
745
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
746
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
747
        }
748
    }
749
    return CODEC_ID_NONE;
750
}
751

    
752
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
753
{
754
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
755
    MOVStreamContext *sc = st->priv_data;
756
    int j, entries, pseudo_stream_id;
757

    
758
    get_byte(pb); /* version */
759
    get_be24(pb); /* flags */
760

    
761
    entries = get_be32(pb);
762

    
763
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
764
        //Parsing Sample description table
765
        enum CodecID id;
766
        int dref_id;
767
        MOVAtom a = { 0, 0, 0 };
768
        int64_t start_pos = url_ftell(pb);
769
        int size = get_be32(pb); /* size */
770
        uint32_t format = get_le32(pb); /* data format */
771

    
772
        get_be32(pb); /* reserved */
773
        get_be16(pb); /* reserved */
774
        dref_id = get_be16(pb);
775

    
776
        if (st->codec->codec_tag &&
777
            st->codec->codec_tag != format &&
778
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
779
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
780
           ){
781
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
782
             * export it as a separate AVStream but this needs a few changes
783
             * in the MOV demuxer, patch welcome. */
784
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
785
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
786
            continue;
787
        }
788
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
789
        sc->dref_id= dref_id;
790

    
791
        st->codec->codec_tag = format;
792
        id = codec_get_id(codec_movaudio_tags, format);
793
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
794
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
795

    
796
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
797
            st->codec->codec_type = CODEC_TYPE_AUDIO;
798
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
799
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
800
            id = codec_get_id(codec_movvideo_tags, format);
801
            if (id <= 0)
802
                id = codec_get_id(codec_bmp_tags, format);
803
            if (id > 0)
804
                st->codec->codec_type = CODEC_TYPE_VIDEO;
805
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
806
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
807
                if(id > 0)
808
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
809
            }
810
        }
811

    
812
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
813
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
814
                (format >> 24) & 0xff, st->codec->codec_type);
815

    
816
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
817
            uint8_t codec_name[32];
818
            unsigned int color_depth;
819
            int color_greyscale;
820

    
821
            st->codec->codec_id = id;
822
            get_be16(pb); /* version */
823
            get_be16(pb); /* revision level */
824
            get_be32(pb); /* vendor */
825
            get_be32(pb); /* temporal quality */
826
            get_be32(pb); /* spatial quality */
827

    
828
            st->codec->width = get_be16(pb); /* width */
829
            st->codec->height = get_be16(pb); /* height */
830

    
831
            get_be32(pb); /* horiz resolution */
832
            get_be32(pb); /* vert resolution */
833
            get_be32(pb); /* data size, always 0 */
834
            get_be16(pb); /* frames per samples */
835

    
836
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
837
            if (codec_name[0] <= 31) {
838
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
839
                st->codec->codec_name[codec_name[0]] = 0;
840
            }
841

    
842
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
843
            st->codec->color_table_id = get_be16(pb); /* colortable id */
844
            dprintf(c->fc, "depth %d, ctab id %d\n",
845
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
846
            /* figure out the palette situation */
847
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
848
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
849

    
850
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
851
            if ((color_depth == 2) || (color_depth == 4) ||
852
                (color_depth == 8)) {
853
                /* for palette traversal */
854
                unsigned int color_start, color_count, color_end;
855
                unsigned char r, g, b;
856

    
857
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
858
                if (color_greyscale) {
859
                    int color_index, color_dec;
860
                    /* compute the greyscale palette */
861
                    st->codec->bits_per_coded_sample = color_depth;
862
                    color_count = 1 << color_depth;
863
                    color_index = 255;
864
                    color_dec = 256 / (color_count - 1);
865
                    for (j = 0; j < color_count; j++) {
866
                        r = g = b = color_index;
867
                        st->codec->palctrl->palette[j] =
868
                            (r << 16) | (g << 8) | (b);
869
                        color_index -= color_dec;
870
                        if (color_index < 0)
871
                            color_index = 0;
872
                    }
873
                } else if (st->codec->color_table_id) {
874
                    const uint8_t *color_table;
875
                    /* if flag bit 3 is set, use the default palette */
876
                    color_count = 1 << color_depth;
877
                    if (color_depth == 2)
878
                        color_table = ff_qt_default_palette_4;
879
                    else if (color_depth == 4)
880
                        color_table = ff_qt_default_palette_16;
881
                    else
882
                        color_table = ff_qt_default_palette_256;
883

    
884
                    for (j = 0; j < color_count; j++) {
885
                        r = color_table[j * 3 + 0];
886
                        g = color_table[j * 3 + 1];
887
                        b = color_table[j * 3 + 2];
888
                        st->codec->palctrl->palette[j] =
889
                            (r << 16) | (g << 8) | (b);
890
                    }
891
                } else {
892
                    /* load the palette from the file */
893
                    color_start = get_be32(pb);
894
                    color_count = get_be16(pb);
895
                    color_end = get_be16(pb);
896
                    if ((color_start <= 255) &&
897
                        (color_end <= 255)) {
898
                        for (j = color_start; j <= color_end; j++) {
899
                            /* each R, G, or B component is 16 bits;
900
                             * only use the top 8 bits; skip alpha bytes
901
                             * up front */
902
                            get_byte(pb);
903
                            get_byte(pb);
904
                            r = get_byte(pb);
905
                            get_byte(pb);
906
                            g = get_byte(pb);
907
                            get_byte(pb);
908
                            b = get_byte(pb);
909
                            get_byte(pb);
910
                            st->codec->palctrl->palette[j] =
911
                                (r << 16) | (g << 8) | (b);
912
                        }
913
                    }
914
                }
915
                st->codec->palctrl->palette_changed = 1;
916
            }
917
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
918
            int bits_per_sample, flags;
919
            uint16_t version = get_be16(pb);
920

    
921
            st->codec->codec_id = id;
922
            get_be16(pb); /* revision level */
923
            get_be32(pb); /* vendor */
924

    
925
            st->codec->channels = get_be16(pb);             /* channel count */
926
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
927
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
928

    
929
            sc->audio_cid = get_be16(pb);
930
            get_be16(pb); /* packet size = 0 */
931

    
932
            st->codec->sample_rate = ((get_be32(pb) >> 16));
933

    
934
            //Read QT version 1 fields. In version 0 these do not exist.
935
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
936
            if(!c->isom) {
937
                if(version==1) {
938
                    sc->samples_per_frame = get_be32(pb);
939
                    get_be32(pb); /* bytes per packet */
940
                    sc->bytes_per_frame = get_be32(pb);
941
                    get_be32(pb); /* bytes per sample */
942
                } else if(version==2) {
943
                    get_be32(pb); /* sizeof struct only */
944
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
945
                    st->codec->channels = get_be32(pb);
946
                    get_be32(pb); /* always 0x7F000000 */
947
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
948
                    flags = get_be32(pb); /* lcpm format specific flag */
949
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
950
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
951
                    if (format == MKTAG('l','p','c','m'))
952
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
953
                }
954
            }
955

    
956
            switch (st->codec->codec_id) {
957
            case CODEC_ID_PCM_S8:
958
            case CODEC_ID_PCM_U8:
959
                if (st->codec->bits_per_coded_sample == 16)
960
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
961
                break;
962
            case CODEC_ID_PCM_S16LE:
963
            case CODEC_ID_PCM_S16BE:
964
                if (st->codec->bits_per_coded_sample == 8)
965
                    st->codec->codec_id = CODEC_ID_PCM_S8;
966
                else if (st->codec->bits_per_coded_sample == 24)
967
                    st->codec->codec_id =
968
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
969
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
970
                break;
971
            /* set values for old format before stsd version 1 appeared */
972
            case CODEC_ID_MACE3:
973
                sc->samples_per_frame = 6;
974
                sc->bytes_per_frame = 2*st->codec->channels;
975
                break;
976
            case CODEC_ID_MACE6:
977
                sc->samples_per_frame = 6;
978
                sc->bytes_per_frame = 1*st->codec->channels;
979
                break;
980
            case CODEC_ID_ADPCM_IMA_QT:
981
                sc->samples_per_frame = 64;
982
                sc->bytes_per_frame = 34*st->codec->channels;
983
                break;
984
            case CODEC_ID_GSM:
985
                sc->samples_per_frame = 160;
986
                sc->bytes_per_frame = 33;
987
                break;
988
            default:
989
                break;
990
            }
991

    
992
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
993
            if (bits_per_sample) {
994
                st->codec->bits_per_coded_sample = bits_per_sample;
995
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
996
            }
997
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
998
            // ttxt stsd contains display flags, justification, background
999
            // color, fonts, and default styles, so fake an atom to read it
1000
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1001
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1002
                mov_read_glbl(c, pb, fake_atom);
1003
            st->codec->codec_id= id;
1004
            st->codec->width = sc->width;
1005
            st->codec->height = sc->height;
1006
        } else {
1007
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1008
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1009
        }
1010
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1011
        a.size = size - (url_ftell(pb) - start_pos);
1012
        if (a.size > 8) {
1013
            if (mov_read_default(c, pb, a) < 0)
1014
                return -1;
1015
        } else if (a.size > 0)
1016
            url_fskip(pb, a.size);
1017
    }
1018

    
1019
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1020
        st->codec->sample_rate= sc->time_scale;
1021

    
1022
    /* special codec parameters handling */
1023
    switch (st->codec->codec_id) {
1024
#if CONFIG_DV_DEMUXER
1025
    case CODEC_ID_DVAUDIO:
1026
        c->dv_fctx = avformat_alloc_context();
1027
        c->dv_demux = dv_init_demux(c->dv_fctx);
1028
        if (!c->dv_demux) {
1029
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1030
            return -1;
1031
        }
1032
        sc->dv_audio_container = 1;
1033
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1034
        break;
1035
#endif
1036
    /* no ifdef since parameters are always those */
1037
    case CODEC_ID_QCELP:
1038
        // force sample rate for qcelp when not stored in mov
1039
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1040
            st->codec->sample_rate = 8000;
1041
        st->codec->frame_size= 160;
1042
        st->codec->channels= 1; /* really needed */
1043
        break;
1044
    case CODEC_ID_AMR_NB:
1045
    case CODEC_ID_AMR_WB:
1046
        st->codec->frame_size= sc->samples_per_frame;
1047
        st->codec->channels= 1; /* really needed */
1048
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1049
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1050
            st->codec->sample_rate = 8000;
1051
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1052
            st->codec->sample_rate = 16000;
1053
        break;
1054
    case CODEC_ID_MP2:
1055
    case CODEC_ID_MP3:
1056
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1057
        st->need_parsing = AVSTREAM_PARSE_FULL;
1058
        break;
1059
    case CODEC_ID_GSM:
1060
    case CODEC_ID_ADPCM_MS:
1061
    case CODEC_ID_ADPCM_IMA_WAV:
1062
        st->codec->block_align = sc->bytes_per_frame;
1063
        break;
1064
    case CODEC_ID_ALAC:
1065
        if (st->codec->extradata_size == 36) {
1066
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1067
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1068
        }
1069
        break;
1070
    default:
1071
        break;
1072
    }
1073

    
1074
    return 0;
1075
}
1076

    
1077
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom 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

    
1086
    entries = get_be32(pb);
1087

    
1088
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1089

    
1090
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1091
        return -1;
1092
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1093
    if (!sc->stsc_data)
1094
        return AVERROR(ENOMEM);
1095
    sc->stsc_count = entries;
1096

    
1097
    for(i=0; i<entries; i++) {
1098
        sc->stsc_data[i].first = get_be32(pb);
1099
        sc->stsc_data[i].count = get_be32(pb);
1100
        sc->stsc_data[i].id = get_be32(pb);
1101
    }
1102
    return 0;
1103
}
1104

    
1105
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1106
{
1107
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1108
    MOVStreamContext *sc = st->priv_data;
1109
    unsigned int i, entries;
1110

    
1111
    get_byte(pb); /* version */
1112
    get_be24(pb); /* flags */
1113

    
1114
    entries = get_be32(pb);
1115

    
1116
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1117

    
1118
    if(entries >= UINT_MAX / sizeof(int))
1119
        return -1;
1120
    sc->keyframes = av_malloc(entries * sizeof(int));
1121
    if (!sc->keyframes)
1122
        return AVERROR(ENOMEM);
1123
    sc->keyframe_count = entries;
1124

    
1125
    for(i=0; i<entries; i++) {
1126
        sc->keyframes[i] = get_be32(pb);
1127
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1128
    }
1129
    return 0;
1130
}
1131

    
1132
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1133
{
1134
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1135
    MOVStreamContext *sc = st->priv_data;
1136
    unsigned int i, entries, sample_size, field_size, num_bytes;
1137
    GetBitContext gb;
1138
    unsigned char* buf;
1139

    
1140
    get_byte(pb); /* version */
1141
    get_be24(pb); /* flags */
1142

    
1143
    if (atom.type == MKTAG('s','t','s','z')) {
1144
        sample_size = get_be32(pb);
1145
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1146
            sc->sample_size = sample_size;
1147
        field_size = 32;
1148
    } else {
1149
        sample_size = 0;
1150
        get_be24(pb); /* reserved */
1151
        field_size = get_byte(pb);
1152
    }
1153
    entries = get_be32(pb);
1154

    
1155
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1156

    
1157
    sc->sample_count = entries;
1158
    if (sample_size)
1159
        return 0;
1160

    
1161
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1162
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1163
        return -1;
1164
    }
1165

    
1166
    if(entries >= UINT_MAX / sizeof(int))
1167
        return -1;
1168
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1169
    if (!sc->sample_sizes)
1170
        return AVERROR(ENOMEM);
1171

    
1172
    num_bytes = (entries*field_size+4)>>3;
1173

    
1174
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1175
    if (!buf) {
1176
        av_freep(&sc->sample_sizes);
1177
        return AVERROR(ENOMEM);
1178
    }
1179

    
1180
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1181
        av_freep(&sc->sample_sizes);
1182
        av_free(buf);
1183
        return -1;
1184
    }
1185

    
1186
    init_get_bits(&gb, buf, 8*num_bytes);
1187

    
1188
    for(i=0; i<entries; i++)
1189
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1190

    
1191
    av_free(buf);
1192
    return 0;
1193
}
1194

    
1195
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1196
{
1197
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1198
    MOVStreamContext *sc = st->priv_data;
1199
    unsigned int i, entries;
1200
    int64_t duration=0;
1201
    int64_t total_sample_count=0;
1202

    
1203
    get_byte(pb); /* version */
1204
    get_be24(pb); /* flags */
1205
    entries = get_be32(pb);
1206

    
1207
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1208

    
1209
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1210
        return -1;
1211
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1212
    if (!sc->stts_data)
1213
        return AVERROR(ENOMEM);
1214
    sc->stts_count = entries;
1215

    
1216
    for(i=0; i<entries; i++) {
1217
        int sample_duration;
1218
        int sample_count;
1219

    
1220
        sample_count=get_be32(pb);
1221
        sample_duration = get_be32(pb);
1222
        sc->stts_data[i].count= sample_count;
1223
        sc->stts_data[i].duration= sample_duration;
1224

    
1225
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1226

    
1227
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1228

    
1229
        duration+=(int64_t)sample_duration*sample_count;
1230
        total_sample_count+=sample_count;
1231
    }
1232

    
1233
    st->nb_frames= total_sample_count;
1234
    if(duration)
1235
        st->duration= duration;
1236
    return 0;
1237
}
1238

    
1239
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1240
{
1241
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1242
    MOVStreamContext *sc = st->priv_data;
1243
    unsigned int i, entries;
1244

    
1245
    get_byte(pb); /* version */
1246
    get_be24(pb); /* flags */
1247
    entries = get_be32(pb);
1248

    
1249
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1250

    
1251
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1252
        return -1;
1253
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1254
    if (!sc->ctts_data)
1255
        return AVERROR(ENOMEM);
1256
    sc->ctts_count = entries;
1257

    
1258
    for(i=0; i<entries; i++) {
1259
        int count    =get_be32(pb);
1260
        int duration =get_be32(pb);
1261

    
1262
        if (duration < 0) {
1263
            sc->wrong_dts = 1;
1264
            st->codec->has_b_frames = 1;
1265
        }
1266
        sc->ctts_data[i].count   = count;
1267
        sc->ctts_data[i].duration= duration;
1268

    
1269
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1270
    }
1271
    return 0;
1272
}
1273

    
1274
static void mov_build_index(MOVContext *mov, AVStream *st)
1275
{
1276
    MOVStreamContext *sc = st->priv_data;
1277
    int64_t current_offset;
1278
    int64_t current_dts = 0;
1279
    unsigned int stts_index = 0;
1280
    unsigned int stsc_index = 0;
1281
    unsigned int stss_index = 0;
1282
    unsigned int i, j;
1283

    
1284
    /* adjust first dts according to edit list */
1285
    if (sc->time_offset) {
1286
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1287
        assert(sc->time_offset % sc->time_rate == 0);
1288
        current_dts = - (rescaled / sc->time_rate);
1289
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1290
            /* more than 16 frames delay, dts are likely wrong
1291
               this happens with files created by iMovie */
1292
            sc->wrong_dts = 1;
1293
            st->codec->has_b_frames = 1;
1294
        }
1295
    }
1296

    
1297
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1298
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1299
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1300
        unsigned int current_sample = 0;
1301
        unsigned int stts_sample = 0;
1302
        unsigned int keyframe, sample_size;
1303
        unsigned int distance = 0;
1304
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1305

    
1306
        st->nb_frames = sc->sample_count;
1307
        for (i = 0; i < sc->chunk_count; i++) {
1308
            current_offset = sc->chunk_offsets[i];
1309
            if (stsc_index + 1 < sc->stsc_count &&
1310
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1311
                stsc_index++;
1312
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1313
                if (current_sample >= sc->sample_count) {
1314
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1315
                    return;
1316
                }
1317
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1318
                if (keyframe) {
1319
                    distance = 0;
1320
                    if (stss_index + 1 < sc->keyframe_count)
1321
                        stss_index++;
1322
                }
1323
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1324
                if(sc->pseudo_stream_id == -1 ||
1325
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1326
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1327
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1328
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1329
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1330
                            current_offset, current_dts, sample_size, distance, keyframe);
1331
                }
1332

    
1333
                current_offset += sample_size;
1334
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1335
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1336
                distance++;
1337
                stts_sample++;
1338
                current_sample++;
1339
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1340
                    stts_sample = 0;
1341
                    stts_index++;
1342
                }
1343
            }
1344
        }
1345
    } else { /* read whole chunk */
1346
        unsigned int chunk_samples, chunk_size, chunk_duration;
1347
        unsigned int frames = 1;
1348
        for (i = 0; i < sc->chunk_count; i++) {
1349
            current_offset = sc->chunk_offsets[i];
1350
            if (stsc_index + 1 < sc->stsc_count &&
1351
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1352
                stsc_index++;
1353
            chunk_samples = sc->stsc_data[stsc_index].count;
1354
            /* get chunk size, beware of alaw/ulaw/mace */
1355
            if (sc->samples_per_frame > 0 &&
1356
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1357
                if (sc->samples_per_frame < 160)
1358
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1359
                else {
1360
                    chunk_size = sc->bytes_per_frame;
1361
                    frames = chunk_samples / sc->samples_per_frame;
1362
                    chunk_samples = sc->samples_per_frame;
1363
                }
1364
            } else
1365
                chunk_size = chunk_samples * sc->sample_size;
1366
            for (j = 0; j < frames; j++) {
1367
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1368
                /* get chunk duration */
1369
                chunk_duration = 0;
1370
                while (chunk_samples > 0) {
1371
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1372
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1373
                        sc->stts_data[stts_index].count -= chunk_samples;
1374
                        break;
1375
                    } else {
1376
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1377
                        chunk_samples -= sc->stts_data[stts_index].count;
1378
                        if (stts_index + 1 < sc->stts_count)
1379
                            stts_index++;
1380
                    }
1381
                }
1382
                current_offset += sc->bytes_per_frame;
1383
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1384
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1385
                        chunk_size, chunk_duration);
1386
                assert(chunk_duration % sc->time_rate == 0);
1387
                current_dts += chunk_duration / sc->time_rate;
1388
            }
1389
        }
1390
    }
1391
}
1392

    
1393
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1394
{
1395
    AVStream *st;
1396
    MOVStreamContext *sc;
1397
    int ret;
1398

    
1399
    st = av_new_stream(c->fc, c->fc->nb_streams);
1400
    if (!st) return AVERROR(ENOMEM);
1401
    sc = av_mallocz(sizeof(MOVStreamContext));
1402
    if (!sc) return AVERROR(ENOMEM);
1403

    
1404
    st->priv_data = sc;
1405
    st->codec->codec_type = CODEC_TYPE_DATA;
1406
    sc->ffindex = st->index;
1407

    
1408
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1409
        return ret;
1410

    
1411
    /* sanity checks */
1412
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1413
                            (!sc->sample_size && !sc->sample_count))) {
1414
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1415
               st->index);
1416
        return 0;
1417
    }
1418

    
1419
    if (!sc->time_rate)
1420
        sc->time_rate = 1;
1421
    if (!sc->time_scale)
1422
        sc->time_scale = c->time_scale;
1423

    
1424
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1425

    
1426
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1427
        !st->codec->frame_size && sc->stts_count == 1) {
1428
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1429
                                           st->codec->sample_rate, sc->time_scale);
1430
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1431
    }
1432

    
1433
    if (st->duration != AV_NOPTS_VALUE) {
1434
        assert(st->duration % sc->time_rate == 0);
1435
        st->duration /= sc->time_rate;
1436
    }
1437

    
1438
    mov_build_index(c, st);
1439

    
1440
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1441
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1442
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1443
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1444
    } else
1445
        sc->pb = c->fc->pb;
1446

    
1447
    switch (st->codec->codec_id) {
1448
#if CONFIG_H261_DECODER
1449
    case CODEC_ID_H261:
1450
#endif
1451
#if CONFIG_H263_DECODER
1452
    case CODEC_ID_H263:
1453
#endif
1454
#if CONFIG_H264_DECODER
1455
    case CODEC_ID_H264:
1456
#endif
1457
#if CONFIG_MPEG4_DECODER
1458
    case CODEC_ID_MPEG4:
1459
#endif
1460
        st->codec->width = 0; /* let decoder init width/height */
1461
        st->codec->height= 0;
1462
        break;
1463
    }
1464

    
1465
    /* Do not need those anymore. */
1466
    av_freep(&sc->chunk_offsets);
1467
    av_freep(&sc->stsc_data);
1468
    av_freep(&sc->sample_sizes);
1469
    av_freep(&sc->keyframes);
1470
    av_freep(&sc->stts_data);
1471

    
1472
    return 0;
1473
}
1474

    
1475
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1476
{
1477
    int ret;
1478
    c->itunes_metadata = 1;
1479
    ret = mov_read_default(c, pb, atom);
1480
    c->itunes_metadata = 0;
1481
    return ret;
1482
}
1483

    
1484
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1485
{
1486
    while (atom.size > 8) {
1487
        uint32_t tag = get_le32(pb);
1488
        atom.size -= 4;
1489
        if (tag == MKTAG('h','d','l','r')) {
1490
            url_fseek(pb, -8, SEEK_CUR);
1491
            atom.size += 8;
1492
            return mov_read_default(c, pb, atom);
1493
        }
1494
    }
1495
    return 0;
1496
}
1497

    
1498
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1499
{
1500
    int i;
1501
    int width;
1502
    int height;
1503
    int64_t disp_transform[2];
1504
    int display_matrix[3][2];
1505
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1506
    MOVStreamContext *sc = st->priv_data;
1507
    int version = get_byte(pb);
1508

    
1509
    get_be24(pb); /* flags */
1510
    /*
1511
    MOV_TRACK_ENABLED 0x0001
1512
    MOV_TRACK_IN_MOVIE 0x0002
1513
    MOV_TRACK_IN_PREVIEW 0x0004
1514
    MOV_TRACK_IN_POSTER 0x0008
1515
    */
1516

    
1517
    if (version == 1) {
1518
        get_be64(pb);
1519
        get_be64(pb);
1520
    } else {
1521
        get_be32(pb); /* creation time */
1522
        get_be32(pb); /* modification time */
1523
    }
1524
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1525
    get_be32(pb); /* reserved */
1526

    
1527
    /* highlevel (considering edits) duration in movie timebase */
1528
    (version == 1) ? get_be64(pb) : get_be32(pb);
1529
    get_be32(pb); /* reserved */
1530
    get_be32(pb); /* reserved */
1531

    
1532
    get_be16(pb); /* layer */
1533
    get_be16(pb); /* alternate group */
1534
    get_be16(pb); /* volume */
1535
    get_be16(pb); /* reserved */
1536

    
1537
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1538
    // they're kept in fixed point format through all calculations
1539
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1540
    for (i = 0; i < 3; i++) {
1541
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1542
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1543
        get_be32(pb);           // 2.30 fixed point (not used)
1544
    }
1545

    
1546
    width = get_be32(pb);       // 16.16 fixed point track width
1547
    height = get_be32(pb);      // 16.16 fixed point track height
1548
    sc->width = width >> 16;
1549
    sc->height = height >> 16;
1550

    
1551
    //transform the display width/height according to the matrix
1552
    // skip this if the display matrix is the default identity matrix
1553
    // to keep the same scale, use [width height 1<<16]
1554
    if (width && height &&
1555
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1556
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1557
        display_matrix[2][0]           || display_matrix[2][1])) {
1558
        for (i = 0; i < 2; i++)
1559
            disp_transform[i] =
1560
                (int64_t)  width  * display_matrix[0][i] +
1561
                (int64_t)  height * display_matrix[1][i] +
1562
                ((int64_t) display_matrix[2][i] << 16);
1563

    
1564
        //sample aspect ratio is new width/height divided by old width/height
1565
        st->sample_aspect_ratio = av_d2q(
1566
            ((double) disp_transform[0] * height) /
1567
            ((double) disp_transform[1] * width), INT_MAX);
1568
    }
1569
    return 0;
1570
}
1571

    
1572
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1573
{
1574
    MOVFragment *frag = &c->fragment;
1575
    MOVTrackExt *trex = NULL;
1576
    int flags, track_id, i;
1577

    
1578
    get_byte(pb); /* version */
1579
    flags = get_be24(pb);
1580

    
1581
    track_id = get_be32(pb);
1582
    if (!track_id)
1583
        return -1;
1584
    frag->track_id = track_id;
1585
    for (i = 0; i < c->trex_count; i++)
1586
        if (c->trex_data[i].track_id == frag->track_id) {
1587
            trex = &c->trex_data[i];
1588
            break;
1589
        }
1590
    if (!trex) {
1591
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1592
        return -1;
1593
    }
1594

    
1595
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1596
    else              frag->base_data_offset = frag->moof_offset;
1597
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1598
    else              frag->stsd_id          = trex->stsd_id;
1599

    
1600
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1601
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1602
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1603
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1604
    return 0;
1605
}
1606

    
1607
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1608
{
1609
    MOVTrackExt *trex;
1610

    
1611
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1612
        return -1;
1613
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1614
    if (!trex)
1615
        return AVERROR(ENOMEM);
1616
    c->trex_data = trex;
1617
    trex = &c->trex_data[c->trex_count++];
1618
    get_byte(pb); /* version */
1619
    get_be24(pb); /* flags */
1620
    trex->track_id = get_be32(pb);
1621
    trex->stsd_id  = get_be32(pb);
1622
    trex->duration = get_be32(pb);
1623
    trex->size     = get_be32(pb);
1624
    trex->flags    = get_be32(pb);
1625
    return 0;
1626
}
1627

    
1628
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1629
{
1630
    MOVFragment *frag = &c->fragment;
1631
    AVStream *st = NULL;
1632
    MOVStreamContext *sc;
1633
    uint64_t offset;
1634
    int64_t dts;
1635
    int data_offset = 0;
1636
    unsigned entries, first_sample_flags = frag->flags;
1637
    int flags, distance, i;
1638

    
1639
    for (i = 0; i < c->fc->nb_streams; i++) {
1640
        if (c->fc->streams[i]->id == frag->track_id) {
1641
            st = c->fc->streams[i];
1642
            break;
1643
        }
1644
    }
1645
    if (!st) {
1646
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1647
        return -1;
1648
    }
1649
    sc = st->priv_data;
1650
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1651
        return 0;
1652
    get_byte(pb); /* version */
1653
    flags = get_be24(pb);
1654
    entries = get_be32(pb);
1655
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1656
    if (flags & 0x001) data_offset        = get_be32(pb);
1657
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1658
    if (flags & 0x800) {
1659
        MOVStts *ctts_data;
1660
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1661
            return -1;
1662
        ctts_data = av_realloc(sc->ctts_data,
1663
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1664
        if (!ctts_data)
1665
            return AVERROR(ENOMEM);
1666
        sc->ctts_data = ctts_data;
1667
    }
1668
    dts = st->duration;
1669
    offset = frag->base_data_offset + data_offset;
1670
    distance = 0;
1671
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1672
    for (i = 0; i < entries; i++) {
1673
        unsigned sample_size = frag->size;
1674
        int sample_flags = i ? frag->flags : first_sample_flags;
1675
        unsigned sample_duration = frag->duration;
1676
        int keyframe;
1677

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

    
1704
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1705
/* like the files created with Adobe Premiere 5.0, for samples see */
1706
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1707
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1708
{
1709
    int err;
1710

    
1711
    if (atom.size < 8)
1712
        return 0; /* continue */
1713
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1714
        url_fskip(pb, atom.size - 4);
1715
        return 0;
1716
    }
1717
    atom.type = get_le32(pb);
1718
    atom.offset += 8;
1719
    atom.size -= 8;
1720
    if (atom.type != MKTAG('m','d','a','t')) {
1721
        url_fskip(pb, atom.size);
1722
        return 0;
1723
    }
1724
    err = mov_read_mdat(c, pb, atom);
1725
    return err;
1726
}
1727

    
1728
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1729
{
1730
#if CONFIG_ZLIB
1731
    ByteIOContext ctx;
1732
    uint8_t *cmov_data;
1733
    uint8_t *moov_data; /* uncompressed data */
1734
    long cmov_len, moov_len;
1735
    int ret = -1;
1736

    
1737
    get_be32(pb); /* dcom atom */
1738
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1739
        return -1;
1740
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1741
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1742
        return -1;
1743
    }
1744
    get_be32(pb); /* cmvd atom */
1745
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1746
        return -1;
1747
    moov_len = get_be32(pb); /* uncompressed size */
1748
    cmov_len = atom.size - 6 * 4;
1749

    
1750
    cmov_data = av_malloc(cmov_len);
1751
    if (!cmov_data)
1752
        return AVERROR(ENOMEM);
1753
    moov_data = av_malloc(moov_len);
1754
    if (!moov_data) {
1755
        av_free(cmov_data);
1756
        return AVERROR(ENOMEM);
1757
    }
1758
    get_buffer(pb, cmov_data, cmov_len);
1759
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1760
        goto free_and_return;
1761
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1762
        goto free_and_return;
1763
    atom.type = MKTAG('m','o','o','v');
1764
    atom.offset = 0;
1765
    atom.size = moov_len;
1766
#ifdef DEBUG
1767
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1768
#endif
1769
    ret = mov_read_default(c, &ctx, atom);
1770
free_and_return:
1771
    av_free(moov_data);
1772
    av_free(cmov_data);
1773
    return ret;
1774
#else
1775
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1776
    return -1;
1777
#endif
1778
}
1779

    
1780
/* edit list atom */
1781
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1782
{
1783
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1784
    int i, edit_count;
1785

    
1786
    get_byte(pb); /* version */
1787
    get_be24(pb); /* flags */
1788
    edit_count = get_be32(pb); /* entries */
1789

    
1790
    for(i=0; i<edit_count; i++){
1791
        int time;
1792
        int duration = get_be32(pb); /* Track duration */
1793
        time = get_be32(pb); /* Media time */
1794
        get_be32(pb); /* Media rate */
1795
        if (i == 0 && time >= -1) {
1796
            sc->time_offset = time != -1 ? time : -duration;
1797
            sc->time_rate = av_gcd(sc->time_rate, FFABS(sc->time_offset));
1798
        }
1799
    }
1800

    
1801
    if(edit_count > 1)
1802
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1803
               "a/v desync might occur, patch welcome\n");
1804

    
1805
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1806
    return 0;
1807
}
1808

    
1809
static const MOVParseTableEntry mov_default_parse_table[] = {
1810
{ MKTAG('a','v','s','s'), mov_read_extradata },
1811
{ MKTAG('c','o','6','4'), mov_read_stco },
1812
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1813
{ MKTAG('d','i','n','f'), mov_read_default },
1814
{ MKTAG('d','r','e','f'), mov_read_dref },
1815
{ MKTAG('e','d','t','s'), mov_read_default },
1816
{ MKTAG('e','l','s','t'), mov_read_elst },
1817
{ MKTAG('e','n','d','a'), mov_read_enda },
1818
{ MKTAG('f','i','e','l'), mov_read_extradata },
1819
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1820
{ MKTAG('g','l','b','l'), mov_read_glbl },
1821
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1822
{ MKTAG('i','l','s','t'), mov_read_ilst },
1823
{ MKTAG('j','p','2','h'), mov_read_extradata },
1824
{ MKTAG('m','d','a','t'), mov_read_mdat },
1825
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1826
{ MKTAG('m','d','i','a'), mov_read_default },
1827
{ MKTAG('m','e','t','a'), mov_read_meta },
1828
{ MKTAG('m','i','n','f'), mov_read_default },
1829
{ MKTAG('m','o','o','f'), mov_read_moof },
1830
{ MKTAG('m','o','o','v'), mov_read_moov },
1831
{ MKTAG('m','v','e','x'), mov_read_default },
1832
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1833
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1834
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1835
{ MKTAG('a','v','c','C'), mov_read_glbl },
1836
{ MKTAG('p','a','s','p'), mov_read_pasp },
1837
{ MKTAG('s','t','b','l'), mov_read_default },
1838
{ MKTAG('s','t','c','o'), mov_read_stco },
1839
{ MKTAG('s','t','s','c'), mov_read_stsc },
1840
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1841
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1842
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1843
{ MKTAG('s','t','t','s'), mov_read_stts },
1844
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
1845
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1846
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1847
{ MKTAG('t','r','a','k'), mov_read_trak },
1848
{ MKTAG('t','r','a','f'), mov_read_default },
1849
{ MKTAG('t','r','e','x'), mov_read_trex },
1850
{ MKTAG('t','r','u','n'), mov_read_trun },
1851
{ MKTAG('u','d','t','a'), mov_read_default },
1852
{ MKTAG('w','a','v','e'), mov_read_wave },
1853
{ MKTAG('e','s','d','s'), mov_read_esds },
1854
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1855
{ MKTAG('c','m','o','v'), mov_read_cmov },
1856
{ 0, NULL }
1857
};
1858

    
1859
static int mov_probe(AVProbeData *p)
1860
{
1861
    unsigned int offset;
1862
    uint32_t tag;
1863
    int score = 0;
1864

    
1865
    /* check file header */
1866
    offset = 0;
1867
    for(;;) {
1868
        /* ignore invalid offset */
1869
        if ((offset + 8) > (unsigned int)p->buf_size)
1870
            return score;
1871
        tag = AV_RL32(p->buf + offset + 4);
1872
        switch(tag) {
1873
        /* check for obvious tags */
1874
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1875
        case MKTAG('m','o','o','v'):
1876
        case MKTAG('m','d','a','t'):
1877
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1878
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1879
        case MKTAG('f','t','y','p'):
1880
            return AVPROBE_SCORE_MAX;
1881
        /* those are more common words, so rate then a bit less */
1882
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1883
        case MKTAG('w','i','d','e'):
1884
        case MKTAG('f','r','e','e'):
1885
        case MKTAG('j','u','n','k'):
1886
        case MKTAG('p','i','c','t'):
1887
            return AVPROBE_SCORE_MAX - 5;
1888
        case MKTAG(0x82,0x82,0x7f,0x7d):
1889
        case MKTAG('s','k','i','p'):
1890
        case MKTAG('u','u','i','d'):
1891
        case MKTAG('p','r','f','l'):
1892
            offset = AV_RB32(p->buf+offset) + offset;
1893
            /* if we only find those cause probedata is too small at least rate them */
1894
            score = AVPROBE_SCORE_MAX - 50;
1895
            break;
1896
        default:
1897
            /* unrecognized tag */
1898
            return score;
1899
        }
1900
    }
1901
    return score;
1902
}
1903

    
1904
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1905
{
1906
    MOVContext *mov = s->priv_data;
1907
    ByteIOContext *pb = s->pb;
1908
    int err;
1909
    MOVAtom atom = { 0, 0, 0 };
1910

    
1911
    mov->fc = s;
1912
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1913
    if(!url_is_streamed(pb))
1914
        atom.size = url_fsize(pb);
1915
    else
1916
        atom.size = INT64_MAX;
1917

    
1918
    /* check MOV header */
1919
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1920
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1921
        return err;
1922
    }
1923
    if (!mov->found_moov) {
1924
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1925
        return -1;
1926
    }
1927
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1928

    
1929
    return 0;
1930
}
1931

    
1932
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1933
{
1934
    MOVContext *mov = s->priv_data;
1935
    MOVStreamContext *sc = 0;
1936
    AVIndexEntry *sample = 0;
1937
    int64_t best_dts = INT64_MAX;
1938
    int i, ret;
1939
 retry:
1940
    for (i = 0; i < s->nb_streams; i++) {
1941
        AVStream *st = s->streams[i];
1942
        MOVStreamContext *msc = st->priv_data;
1943
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
1944
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1945
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1946
                                     AV_TIME_BASE, msc->time_scale);
1947
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1948
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1949
                (!url_is_streamed(s->pb) &&
1950
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1951
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1952
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1953
                sample = current_sample;
1954
                best_dts = dts;
1955
                sc = msc;
1956
            }
1957
        }
1958
    }
1959
    if (!sample) {
1960
        mov->found_mdat = 0;
1961
        if (!url_is_streamed(s->pb) ||
1962
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1963
            url_feof(s->pb))
1964
            return -1;
1965
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1966
        goto retry;
1967
    }
1968
    /* must be done just before reading, to avoid infinite loop on sample */
1969
    sc->current_sample++;
1970
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1971
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1972
               sc->ffindex, sample->pos);
1973
        return -1;
1974
    }
1975
    ret = av_get_packet(sc->pb, pkt, sample->size);
1976
    if (ret < 0)
1977
        return ret;
1978
#if CONFIG_DV_DEMUXER
1979
    if (mov->dv_demux && sc->dv_audio_container) {
1980
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1981
        av_free(pkt->data);
1982
        pkt->size = 0;
1983
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1984
            return -1;
1985
    }
1986
#endif
1987
    pkt->stream_index = sc->ffindex;
1988
    pkt->dts = sample->timestamp;
1989
    if (sc->ctts_data) {
1990
        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
1991
        pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
1992
        /* update ctts context */
1993
        sc->ctts_sample++;
1994
        if (sc->ctts_index < sc->ctts_count &&
1995
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
1996
            sc->ctts_index++;
1997
            sc->ctts_sample = 0;
1998
        }
1999
        if (sc->wrong_dts)
2000
            pkt->dts = AV_NOPTS_VALUE;
2001
    } else {
2002
        AVStream *st = s->streams[sc->ffindex];
2003
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2004
            st->index_entries[sc->current_sample].timestamp : st->duration;
2005
        pkt->duration = next_dts - pkt->dts;
2006
        pkt->pts = pkt->dts;
2007
    }
2008
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
2009
    pkt->pos = sample->pos;
2010
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2011
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2012
    return 0;
2013
}
2014

    
2015
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
2016
{
2017
    MOVStreamContext *sc = st->priv_data;
2018
    int sample, time_sample;
2019
    int i;
2020

    
2021
    sample = av_index_search_timestamp(st, timestamp, flags);
2022
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2023
    if (sample < 0) /* not sure what to do */
2024
        return -1;
2025
    sc->current_sample = sample;
2026
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
2027
    /* adjust ctts index */
2028
    if (sc->ctts_data) {
2029
        time_sample = 0;
2030
        for (i = 0; i < sc->ctts_count; i++) {
2031
            int next = time_sample + sc->ctts_data[i].count;
2032
            if (next > sc->current_sample) {
2033
                sc->ctts_index = i;
2034
                sc->ctts_sample = sc->current_sample - time_sample;
2035
                break;
2036
            }
2037
            time_sample = next;
2038
        }
2039
    }
2040
    return sample;
2041
}
2042

    
2043
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2044
{
2045
    AVStream *st;
2046
    int64_t seek_timestamp, timestamp;
2047
    int sample;
2048
    int i;
2049

    
2050
    if (stream_index >= s->nb_streams)
2051
        return -1;
2052
    if (sample_time < 0)
2053
        sample_time = 0;
2054

    
2055
    st = s->streams[stream_index];
2056
    sample = mov_seek_stream(st, sample_time, flags);
2057
    if (sample < 0)
2058
        return -1;
2059

    
2060
    /* adjust seek timestamp to found sample timestamp */
2061
    seek_timestamp = st->index_entries[sample].timestamp;
2062

    
2063
    for (i = 0; i < s->nb_streams; i++) {
2064
        st = s->streams[i];
2065
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2066
            continue;
2067

    
2068
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2069
        mov_seek_stream(st, timestamp, flags);
2070
    }
2071
    return 0;
2072
}
2073

    
2074
static int mov_read_close(AVFormatContext *s)
2075
{
2076
    MOVContext *mov = s->priv_data;
2077
    int i, j;
2078

    
2079
    for (i = 0; i < s->nb_streams; i++) {
2080
        AVStream *st = s->streams[i];
2081
        MOVStreamContext *sc = st->priv_data;
2082

    
2083
        av_freep(&sc->ctts_data);
2084
        for (j = 0; j < sc->drefs_count; j++)
2085
            av_freep(&sc->drefs[j].path);
2086
        av_freep(&sc->drefs);
2087
        if (sc->pb && sc->pb != s->pb)
2088
            url_fclose(sc->pb);
2089

    
2090
        av_freep(&st->codec->palctrl);
2091
    }
2092

    
2093
    if (mov->dv_demux) {
2094
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2095
            av_freep(&mov->dv_fctx->streams[i]->codec);
2096
            av_freep(&mov->dv_fctx->streams[i]);
2097
        }
2098
        av_freep(&mov->dv_fctx);
2099
        av_freep(&mov->dv_demux);
2100
    }
2101

    
2102
    av_freep(&mov->trex_data);
2103

    
2104
    return 0;
2105
}
2106

    
2107
AVInputFormat mov_demuxer = {
2108
    "mov,mp4,m4a,3gp,3g2,mj2",
2109
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2110
    sizeof(MOVContext),
2111
    mov_probe,
2112
    mov_read_header,
2113
    mov_read_packet,
2114
    mov_read_close,
2115
    mov_read_seek,
2116
};