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ffmpeg / libavformat / mov.c @ 9106a698

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1
/*
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 * 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.
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 *
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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

    
23
#include <limits.h>
24

    
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//#define DEBUG
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//#define DEBUG_METADATA
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//#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"
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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:
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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;
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    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_NONE,   AOT_NULL },
388
};
389

    
390
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
391
{
392
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
393
    int tag, len;
394

    
395
    get_be32(pb); /* version + flags */
396
    len = mp4_read_descr(c, pb, &tag);
397
    if (tag == MP4ESDescrTag) {
398
        get_be16(pb); /* ID */
399
        get_byte(pb); /* priority */
400
    } else
401
        get_be16(pb); /* ID */
402

    
403
    len = mp4_read_descr(c, pb, &tag);
404
    if (tag == MP4DecConfigDescrTag) {
405
        int object_type_id = get_byte(pb);
406
        get_byte(pb); /* stream type */
407
        get_be24(pb); /* buffer size db */
408
        get_be32(pb); /* max bitrate */
409
        get_be32(pb); /* avg bitrate */
410

    
411
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
412
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
413
        len = mp4_read_descr(c, pb, &tag);
414
        if (tag == MP4DecSpecificDescrTag) {
415
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
416
            if((uint64_t)len > (1<<30))
417
                return -1;
418
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
419
            if (!st->codec->extradata)
420
                return AVERROR(ENOMEM);
421
            get_buffer(pb, st->codec->extradata, len);
422
            st->codec->extradata_size = len;
423
            if (st->codec->codec_id == CODEC_ID_AAC) {
424
                MPEG4AudioConfig cfg;
425
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
426
                                         st->codec->extradata_size);
427
                if (cfg.chan_config > 7)
428
                    return -1;
429
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
430
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
431
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
432
                else
433
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
434
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
435
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
436
                        cfg.object_type, cfg.ext_object_type,
437
                        cfg.sample_rate, cfg.ext_sample_rate);
438
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
439
                                                         cfg.object_type)))
440
                    st->codec->codec_id = CODEC_ID_AAC;
441
            }
442
        }
443
    }
444
    return 0;
445
}
446

    
447
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
448
{
449
    const int num = get_be32(pb);
450
    const int den = get_be32(pb);
451
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
452
    if (den != 0) {
453
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
454
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
455
            av_log(c->fc, AV_LOG_WARNING,
456
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
457
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
458
        st->sample_aspect_ratio.num = num;
459
        st->sample_aspect_ratio.den = den;
460
    }
461
    return 0;
462
}
463

    
464
/* this atom contains actual media data */
465
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
466
{
467
    if(atom.size == 0) /* wrong one (MP4) */
468
        return 0;
469
    c->found_mdat=1;
470
    return 0; /* now go for moov */
471
}
472

    
473
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
474
{
475
    uint32_t type = get_le32(pb);
476

    
477
    if (type != MKTAG('q','t',' ',' '))
478
        c->isom = 1;
479
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
480
    get_be32(pb); /* minor version */
481
    url_fskip(pb, atom.size - 8);
482
    return 0;
483
}
484

    
485
/* this atom should contain all header atoms */
486
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
487
{
488
    if (mov_read_default(c, pb, atom) < 0)
489
        return -1;
490
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
491
    /* so we don't parse the whole file if over a network */
492
    c->found_moov=1;
493
    return 0; /* now go for mdat */
494
}
495

    
496
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
497
{
498
    c->fragment.moof_offset = url_ftell(pb) - 8;
499
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
500
    return mov_read_default(c, pb, atom);
501
}
502

    
503
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
504
{
505
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
506
    MOVStreamContext *sc = st->priv_data;
507
    int version = get_byte(pb);
508
    char language[4] = {0};
509
    unsigned lang;
510

    
511
    if (version > 1)
512
        return -1; /* unsupported */
513

    
514
    get_be24(pb); /* flags */
515
    if (version == 1) {
516
        get_be64(pb);
517
        get_be64(pb);
518
    } else {
519
        get_be32(pb); /* creation time */
520
        get_be32(pb); /* modification time */
521
    }
522

    
523
    sc->time_scale = get_be32(pb);
524
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
525

    
526
    lang = get_be16(pb); /* language */
527
    if (ff_mov_lang_to_iso639(lang, language))
528
        av_metadata_set(&st->metadata, "language", language);
529
    get_be16(pb); /* quality */
530

    
531
    return 0;
532
}
533

    
534
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
535
{
536
    int version = get_byte(pb); /* version */
537
    get_be24(pb); /* flags */
538

    
539
    if (version == 1) {
540
        get_be64(pb);
541
        get_be64(pb);
542
    } else {
543
        get_be32(pb); /* creation time */
544
        get_be32(pb); /* modification time */
545
    }
546
    c->time_scale = get_be32(pb); /* time scale */
547

    
548
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
549

    
550
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
551
    get_be32(pb); /* preferred scale */
552

    
553
    get_be16(pb); /* preferred volume */
554

    
555
    url_fskip(pb, 10); /* reserved */
556

    
557
    url_fskip(pb, 36); /* display matrix */
558

    
559
    get_be32(pb); /* preview time */
560
    get_be32(pb); /* preview duration */
561
    get_be32(pb); /* poster time */
562
    get_be32(pb); /* selection time */
563
    get_be32(pb); /* selection duration */
564
    get_be32(pb); /* current time */
565
    get_be32(pb); /* next track ID */
566

    
567
    return 0;
568
}
569

    
570
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
571
{
572
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
573

    
574
    if((uint64_t)atom.size > (1<<30))
575
        return -1;
576

    
577
    // currently SVQ3 decoder expect full STSD header - so let's fake it
578
    // this should be fixed and just SMI header should be passed
579
    av_free(st->codec->extradata);
580
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
581
    if (!st->codec->extradata)
582
        return AVERROR(ENOMEM);
583
    st->codec->extradata_size = 0x5a + atom.size;
584
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
585
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
586
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
587
    return 0;
588
}
589

    
590
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
591
{
592
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
593
    int little_endian = get_be16(pb);
594

    
595
    dprintf(c->fc, "enda %d\n", little_endian);
596
    if (little_endian == 1) {
597
        switch (st->codec->codec_id) {
598
        case CODEC_ID_PCM_S24BE:
599
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
600
            break;
601
        case CODEC_ID_PCM_S32BE:
602
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
603
            break;
604
        case CODEC_ID_PCM_F32BE:
605
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
606
            break;
607
        case CODEC_ID_PCM_F64BE:
608
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
609
            break;
610
        default:
611
            break;
612
        }
613
    }
614
    return 0;
615
}
616

    
617
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
618
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
619
{
620
    AVStream *st;
621
    uint64_t size;
622
    uint8_t *buf;
623

    
624
    if (c->fc->nb_streams < 1) // will happen with jp2 files
625
        return 0;
626
    st= c->fc->streams[c->fc->nb_streams-1];
627
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
628
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
629
        return -1;
630
    buf= av_realloc(st->codec->extradata, size);
631
    if(!buf)
632
        return -1;
633
    st->codec->extradata= buf;
634
    buf+= st->codec->extradata_size;
635
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
636
    AV_WB32(       buf    , atom.size + 8);
637
    AV_WL32(       buf + 4, atom.type);
638
    get_buffer(pb, buf + 8, atom.size);
639
    return 0;
640
}
641

    
642
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
643
{
644
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
645

    
646
    if((uint64_t)atom.size > (1<<30))
647
        return -1;
648

    
649
    if (st->codec->codec_id == CODEC_ID_QDM2) {
650
        // pass all frma atom to codec, needed at least for QDM2
651
        av_free(st->codec->extradata);
652
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
653
        if (!st->codec->extradata)
654
            return AVERROR(ENOMEM);
655
        st->codec->extradata_size = atom.size;
656
        get_buffer(pb, st->codec->extradata, atom.size);
657
    } else if (atom.size > 8) { /* to read frma, esds atoms */
658
        if (mov_read_default(c, pb, atom) < 0)
659
            return -1;
660
    } else
661
        url_fskip(pb, atom.size);
662
    return 0;
663
}
664

    
665
/**
666
 * This function reads atom content and puts data in extradata without tag
667
 * nor size unlike mov_read_extradata.
668
 */
669
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
670
{
671
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
672

    
673
    if((uint64_t)atom.size > (1<<30))
674
        return -1;
675

    
676
    av_free(st->codec->extradata);
677
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
678
    if (!st->codec->extradata)
679
        return AVERROR(ENOMEM);
680
    st->codec->extradata_size = atom.size;
681
    get_buffer(pb, st->codec->extradata, atom.size);
682
    return 0;
683
}
684

    
685
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
686
{
687
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
688
    MOVStreamContext *sc = st->priv_data;
689
    unsigned int i, entries;
690

    
691
    get_byte(pb); /* version */
692
    get_be24(pb); /* flags */
693

    
694
    entries = get_be32(pb);
695

    
696
    if(entries >= UINT_MAX/sizeof(int64_t))
697
        return -1;
698

    
699
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
700
    if (!sc->chunk_offsets)
701
        return AVERROR(ENOMEM);
702
    sc->chunk_count = entries;
703

    
704
    if      (atom.type == MKTAG('s','t','c','o'))
705
        for(i=0; i<entries; i++)
706
            sc->chunk_offsets[i] = get_be32(pb);
707
    else if (atom.type == MKTAG('c','o','6','4'))
708
        for(i=0; i<entries; i++)
709
            sc->chunk_offsets[i] = get_be64(pb);
710
    else
711
        return -1;
712

    
713
    return 0;
714
}
715

    
716
/**
717
 * Compute codec id for 'lpcm' tag.
718
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
719
 */
720
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
721
{
722
    if (flags & 1) { // floating point
723
        if (flags & 2) { // big endian
724
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
725
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
726
        } else {
727
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
728
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
729
        }
730
    } else {
731
        if (flags & 2) {
732
            if      (bps == 8)
733
                // signed integer
734
                if (flags & 4)  return CODEC_ID_PCM_S8;
735
                else            return CODEC_ID_PCM_U8;
736
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
737
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
738
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
739
        } else {
740
            if      (bps == 8)
741
                if (flags & 4)  return CODEC_ID_PCM_S8;
742
                else            return CODEC_ID_PCM_U8;
743
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
744
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
745
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
746
        }
747
    }
748
    return CODEC_ID_NONE;
749
}
750

    
751
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
752
{
753
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
754
    MOVStreamContext *sc = st->priv_data;
755
    int j, entries, pseudo_stream_id;
756

    
757
    get_byte(pb); /* version */
758
    get_be24(pb); /* flags */
759

    
760
    entries = get_be32(pb);
761

    
762
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
763
        //Parsing Sample description table
764
        enum CodecID id;
765
        int dref_id;
766
        MOVAtom a = { 0, 0, 0 };
767
        int64_t start_pos = url_ftell(pb);
768
        int size = get_be32(pb); /* size */
769
        uint32_t format = get_le32(pb); /* data format */
770

    
771
        get_be32(pb); /* reserved */
772
        get_be16(pb); /* reserved */
773
        dref_id = get_be16(pb);
774

    
775
        if (st->codec->codec_tag &&
776
            st->codec->codec_tag != format &&
777
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
778
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
779
           ){
780
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
781
             * export it as a separate AVStream but this needs a few changes
782
             * in the MOV demuxer, patch welcome. */
783
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
784
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
785
            continue;
786
        }
787
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
788
        sc->dref_id= dref_id;
789

    
790
        st->codec->codec_tag = format;
791
        id = codec_get_id(codec_movaudio_tags, format);
792
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
793
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
794

    
795
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
796
            st->codec->codec_type = CODEC_TYPE_AUDIO;
797
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
798
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
799
            id = codec_get_id(codec_movvideo_tags, format);
800
            if (id <= 0)
801
                id = codec_get_id(codec_bmp_tags, format);
802
            if (id > 0)
803
                st->codec->codec_type = CODEC_TYPE_VIDEO;
804
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
805
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
806
                if(id > 0)
807
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
808
            }
809
        }
810

    
811
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
812
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
813
                (format >> 24) & 0xff, st->codec->codec_type);
814

    
815
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
816
            uint8_t codec_name[32];
817
            unsigned int color_depth;
818
            int color_greyscale;
819

    
820
            st->codec->codec_id = id;
821
            get_be16(pb); /* version */
822
            get_be16(pb); /* revision level */
823
            get_be32(pb); /* vendor */
824
            get_be32(pb); /* temporal quality */
825
            get_be32(pb); /* spatial quality */
826

    
827
            st->codec->width = get_be16(pb); /* width */
828
            st->codec->height = get_be16(pb); /* height */
829

    
830
            get_be32(pb); /* horiz resolution */
831
            get_be32(pb); /* vert resolution */
832
            get_be32(pb); /* data size, always 0 */
833
            get_be16(pb); /* frames per samples */
834

    
835
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
836
            if (codec_name[0] <= 31) {
837
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
838
                st->codec->codec_name[codec_name[0]] = 0;
839
            }
840

    
841
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
842
            st->codec->color_table_id = get_be16(pb); /* colortable id */
843
            dprintf(c->fc, "depth %d, ctab id %d\n",
844
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
845
            /* figure out the palette situation */
846
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
847
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
848

    
849
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
850
            if ((color_depth == 2) || (color_depth == 4) ||
851
                (color_depth == 8)) {
852
                /* for palette traversal */
853
                unsigned int color_start, color_count, color_end;
854
                unsigned char r, g, b;
855

    
856
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
857
                if (color_greyscale) {
858
                    int color_index, color_dec;
859
                    /* compute the greyscale palette */
860
                    st->codec->bits_per_coded_sample = color_depth;
861
                    color_count = 1 << color_depth;
862
                    color_index = 255;
863
                    color_dec = 256 / (color_count - 1);
864
                    for (j = 0; j < color_count; j++) {
865
                        r = g = b = color_index;
866
                        st->codec->palctrl->palette[j] =
867
                            (r << 16) | (g << 8) | (b);
868
                        color_index -= color_dec;
869
                        if (color_index < 0)
870
                            color_index = 0;
871
                    }
872
                } else if (st->codec->color_table_id) {
873
                    const uint8_t *color_table;
874
                    /* if flag bit 3 is set, use the default palette */
875
                    color_count = 1 << color_depth;
876
                    if (color_depth == 2)
877
                        color_table = ff_qt_default_palette_4;
878
                    else if (color_depth == 4)
879
                        color_table = ff_qt_default_palette_16;
880
                    else
881
                        color_table = ff_qt_default_palette_256;
882

    
883
                    for (j = 0; j < color_count; j++) {
884
                        r = color_table[j * 3 + 0];
885
                        g = color_table[j * 3 + 1];
886
                        b = color_table[j * 3 + 2];
887
                        st->codec->palctrl->palette[j] =
888
                            (r << 16) | (g << 8) | (b);
889
                    }
890
                } else {
891
                    /* load the palette from the file */
892
                    color_start = get_be32(pb);
893
                    color_count = get_be16(pb);
894
                    color_end = get_be16(pb);
895
                    if ((color_start <= 255) &&
896
                        (color_end <= 255)) {
897
                        for (j = color_start; j <= color_end; j++) {
898
                            /* each R, G, or B component is 16 bits;
899
                             * only use the top 8 bits; skip alpha bytes
900
                             * up front */
901
                            get_byte(pb);
902
                            get_byte(pb);
903
                            r = get_byte(pb);
904
                            get_byte(pb);
905
                            g = get_byte(pb);
906
                            get_byte(pb);
907
                            b = get_byte(pb);
908
                            get_byte(pb);
909
                            st->codec->palctrl->palette[j] =
910
                                (r << 16) | (g << 8) | (b);
911
                        }
912
                    }
913
                }
914
                st->codec->palctrl->palette_changed = 1;
915
            }
916
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
917
            int bits_per_sample, flags;
918
            uint16_t version = get_be16(pb);
919

    
920
            st->codec->codec_id = id;
921
            get_be16(pb); /* revision level */
922
            get_be32(pb); /* vendor */
923

    
924
            st->codec->channels = get_be16(pb);             /* channel count */
925
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
926
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
927

    
928
            sc->audio_cid = get_be16(pb);
929
            get_be16(pb); /* packet size = 0 */
930

    
931
            st->codec->sample_rate = ((get_be32(pb) >> 16));
932

    
933
            //Read QT version 1 fields. In version 0 these do not exist.
934
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
935
            if(!c->isom) {
936
                if(version==1) {
937
                    sc->samples_per_frame = get_be32(pb);
938
                    get_be32(pb); /* bytes per packet */
939
                    sc->bytes_per_frame = get_be32(pb);
940
                    get_be32(pb); /* bytes per sample */
941
                } else if(version==2) {
942
                    get_be32(pb); /* sizeof struct only */
943
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
944
                    st->codec->channels = get_be32(pb);
945
                    get_be32(pb); /* always 0x7F000000 */
946
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
947
                    flags = get_be32(pb); /* lcpm format specific flag */
948
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
949
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
950
                    if (format == MKTAG('l','p','c','m'))
951
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
952
                }
953
            }
954

    
955
            switch (st->codec->codec_id) {
956
            case CODEC_ID_PCM_S8:
957
            case CODEC_ID_PCM_U8:
958
                if (st->codec->bits_per_coded_sample == 16)
959
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
960
                break;
961
            case CODEC_ID_PCM_S16LE:
962
            case CODEC_ID_PCM_S16BE:
963
                if (st->codec->bits_per_coded_sample == 8)
964
                    st->codec->codec_id = CODEC_ID_PCM_S8;
965
                else if (st->codec->bits_per_coded_sample == 24)
966
                    st->codec->codec_id =
967
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
968
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
969
                break;
970
            /* set values for old format before stsd version 1 appeared */
971
            case CODEC_ID_MACE3:
972
                sc->samples_per_frame = 6;
973
                sc->bytes_per_frame = 2*st->codec->channels;
974
                break;
975
            case CODEC_ID_MACE6:
976
                sc->samples_per_frame = 6;
977
                sc->bytes_per_frame = 1*st->codec->channels;
978
                break;
979
            case CODEC_ID_ADPCM_IMA_QT:
980
                sc->samples_per_frame = 64;
981
                sc->bytes_per_frame = 34*st->codec->channels;
982
                break;
983
            case CODEC_ID_GSM:
984
                sc->samples_per_frame = 160;
985
                sc->bytes_per_frame = 33;
986
                break;
987
            default:
988
                break;
989
            }
990

    
991
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
992
            if (bits_per_sample) {
993
                st->codec->bits_per_coded_sample = bits_per_sample;
994
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
995
            }
996
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
997
            // ttxt stsd contains display flags, justification, background
998
            // color, fonts, and default styles, so fake an atom to read it
999
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1000
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1001
                mov_read_glbl(c, pb, fake_atom);
1002
            st->codec->codec_id= id;
1003
            st->codec->width = sc->width;
1004
            st->codec->height = sc->height;
1005
        } else {
1006
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1007
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1008
        }
1009
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1010
        a.size = size - (url_ftell(pb) - start_pos);
1011
        if (a.size > 8) {
1012
            if (mov_read_default(c, pb, a) < 0)
1013
                return -1;
1014
        } else if (a.size > 0)
1015
            url_fskip(pb, a.size);
1016
    }
1017

    
1018
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1019
        st->codec->sample_rate= sc->time_scale;
1020

    
1021
    /* special codec parameters handling */
1022
    switch (st->codec->codec_id) {
1023
#if CONFIG_DV_DEMUXER
1024
    case CODEC_ID_DVAUDIO:
1025
        c->dv_fctx = avformat_alloc_context();
1026
        c->dv_demux = dv_init_demux(c->dv_fctx);
1027
        if (!c->dv_demux) {
1028
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1029
            return -1;
1030
        }
1031
        sc->dv_audio_container = 1;
1032
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1033
        break;
1034
#endif
1035
    /* no ifdef since parameters are always those */
1036
    case CODEC_ID_QCELP:
1037
        // force sample rate for qcelp when not stored in mov
1038
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1039
            st->codec->sample_rate = 8000;
1040
        st->codec->frame_size= 160;
1041
        st->codec->channels= 1; /* really needed */
1042
        break;
1043
    case CODEC_ID_AMR_NB:
1044
    case CODEC_ID_AMR_WB:
1045
        st->codec->frame_size= sc->samples_per_frame;
1046
        st->codec->channels= 1; /* really needed */
1047
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1048
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1049
            st->codec->sample_rate = 8000;
1050
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1051
            st->codec->sample_rate = 16000;
1052
        break;
1053
    case CODEC_ID_MP2:
1054
    case CODEC_ID_MP3:
1055
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1056
        st->need_parsing = AVSTREAM_PARSE_FULL;
1057
        break;
1058
    case CODEC_ID_GSM:
1059
    case CODEC_ID_ADPCM_MS:
1060
    case CODEC_ID_ADPCM_IMA_WAV:
1061
        st->codec->block_align = sc->bytes_per_frame;
1062
        break;
1063
    case CODEC_ID_ALAC:
1064
        if (st->codec->extradata_size == 36) {
1065
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1066
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1067
        }
1068
        break;
1069
    default:
1070
        break;
1071
    }
1072

    
1073
    return 0;
1074
}
1075

    
1076
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1077
{
1078
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1079
    MOVStreamContext *sc = st->priv_data;
1080
    unsigned int i, entries;
1081

    
1082
    get_byte(pb); /* version */
1083
    get_be24(pb); /* flags */
1084

    
1085
    entries = get_be32(pb);
1086

    
1087
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1088

    
1089
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1090
        return -1;
1091
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1092
    if (!sc->stsc_data)
1093
        return AVERROR(ENOMEM);
1094
    sc->stsc_count = entries;
1095

    
1096
    for(i=0; i<entries; i++) {
1097
        sc->stsc_data[i].first = get_be32(pb);
1098
        sc->stsc_data[i].count = get_be32(pb);
1099
        sc->stsc_data[i].id = get_be32(pb);
1100
    }
1101
    return 0;
1102
}
1103

    
1104
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1105
{
1106
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1107
    MOVStreamContext *sc = st->priv_data;
1108
    unsigned int i, entries;
1109

    
1110
    get_byte(pb); /* version */
1111
    get_be24(pb); /* flags */
1112

    
1113
    entries = get_be32(pb);
1114

    
1115
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1116

    
1117
    if(entries >= UINT_MAX / sizeof(int))
1118
        return -1;
1119
    sc->keyframes = av_malloc(entries * sizeof(int));
1120
    if (!sc->keyframes)
1121
        return AVERROR(ENOMEM);
1122
    sc->keyframe_count = entries;
1123

    
1124
    for(i=0; i<entries; i++) {
1125
        sc->keyframes[i] = get_be32(pb);
1126
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1127
    }
1128
    return 0;
1129
}
1130

    
1131
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1132
{
1133
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1134
    MOVStreamContext *sc = st->priv_data;
1135
    unsigned int i, entries, sample_size, field_size, num_bytes;
1136
    GetBitContext gb;
1137
    unsigned char* buf;
1138

    
1139
    get_byte(pb); /* version */
1140
    get_be24(pb); /* flags */
1141

    
1142
    if (atom.type == MKTAG('s','t','s','z')) {
1143
        sample_size = get_be32(pb);
1144
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1145
            sc->sample_size = sample_size;
1146
        field_size = 32;
1147
    } else {
1148
        sample_size = 0;
1149
        get_be24(pb); /* reserved */
1150
        field_size = get_byte(pb);
1151
    }
1152
    entries = get_be32(pb);
1153

    
1154
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1155

    
1156
    sc->sample_count = entries;
1157
    if (sample_size)
1158
        return 0;
1159

    
1160
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1161
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1162
        return -1;
1163
    }
1164

    
1165
    if(entries >= UINT_MAX / sizeof(int))
1166
        return -1;
1167
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1168
    if (!sc->sample_sizes)
1169
        return AVERROR(ENOMEM);
1170

    
1171
    num_bytes = (entries*field_size+4)>>3;
1172

    
1173
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1174
    if (!buf) {
1175
        av_freep(&sc->sample_sizes);
1176
        return AVERROR(ENOMEM);
1177
    }
1178

    
1179
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1180
        av_freep(&sc->sample_sizes);
1181
        av_free(buf);
1182
        return -1;
1183
    }
1184

    
1185
    init_get_bits(&gb, buf, 8*num_bytes);
1186

    
1187
    for(i=0; i<entries; i++)
1188
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1189

    
1190
    av_free(buf);
1191
    return 0;
1192
}
1193

    
1194
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1195
{
1196
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1197
    MOVStreamContext *sc = st->priv_data;
1198
    unsigned int i, entries;
1199
    int64_t duration=0;
1200
    int64_t total_sample_count=0;
1201

    
1202
    get_byte(pb); /* version */
1203
    get_be24(pb); /* flags */
1204
    entries = get_be32(pb);
1205

    
1206
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1207

    
1208
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1209
        return -1;
1210
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1211
    if (!sc->stts_data)
1212
        return AVERROR(ENOMEM);
1213
    sc->stts_count = entries;
1214

    
1215
    for(i=0; i<entries; i++) {
1216
        int sample_duration;
1217
        int sample_count;
1218

    
1219
        sample_count=get_be32(pb);
1220
        sample_duration = get_be32(pb);
1221
        sc->stts_data[i].count= sample_count;
1222
        sc->stts_data[i].duration= sample_duration;
1223

    
1224
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1225

    
1226
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1227

    
1228
        duration+=(int64_t)sample_duration*sample_count;
1229
        total_sample_count+=sample_count;
1230
    }
1231

    
1232
    st->nb_frames= total_sample_count;
1233
    if(duration)
1234
        st->duration= duration;
1235
    return 0;
1236
}
1237

    
1238
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1239
{
1240
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1241
    MOVStreamContext *sc = st->priv_data;
1242
    unsigned int i, entries;
1243

    
1244
    get_byte(pb); /* version */
1245
    get_be24(pb); /* flags */
1246
    entries = get_be32(pb);
1247

    
1248
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1249

    
1250
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1251
        return -1;
1252
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1253
    if (!sc->ctts_data)
1254
        return AVERROR(ENOMEM);
1255
    sc->ctts_count = entries;
1256

    
1257
    for(i=0; i<entries; i++) {
1258
        int count    =get_be32(pb);
1259
        int duration =get_be32(pb);
1260

    
1261
        if (duration < 0) {
1262
            sc->wrong_dts = 1;
1263
            st->codec->has_b_frames = 1;
1264
        }
1265
        sc->ctts_data[i].count   = count;
1266
        sc->ctts_data[i].duration= duration;
1267

    
1268
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1269
    }
1270
    return 0;
1271
}
1272

    
1273
static void mov_build_index(MOVContext *mov, AVStream *st)
1274
{
1275
    MOVStreamContext *sc = st->priv_data;
1276
    int64_t current_offset;
1277
    int64_t current_dts = 0;
1278
    unsigned int stts_index = 0;
1279
    unsigned int stsc_index = 0;
1280
    unsigned int stss_index = 0;
1281
    unsigned int i, j;
1282

    
1283
    /* adjust first dts according to edit list */
1284
    if (sc->time_offset) {
1285
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1286
        assert(sc->time_offset % sc->time_rate == 0);
1287
        current_dts = - (rescaled / sc->time_rate);
1288
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1289
            /* more than 16 frames delay, dts are likely wrong
1290
               this happens with files created by iMovie */
1291
            sc->wrong_dts = 1;
1292
            st->codec->has_b_frames = 1;
1293
        }
1294
    }
1295

    
1296
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1297
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1298
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1299
        unsigned int current_sample = 0;
1300
        unsigned int stts_sample = 0;
1301
        unsigned int keyframe, sample_size;
1302
        unsigned int distance = 0;
1303
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1304

    
1305
        st->nb_frames = sc->sample_count;
1306
        for (i = 0; i < sc->chunk_count; i++) {
1307
            current_offset = sc->chunk_offsets[i];
1308
            if (stsc_index + 1 < sc->stsc_count &&
1309
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1310
                stsc_index++;
1311
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1312
                if (current_sample >= sc->sample_count) {
1313
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1314
                    return;
1315
                }
1316
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1317
                if (keyframe) {
1318
                    distance = 0;
1319
                    if (stss_index + 1 < sc->keyframe_count)
1320
                        stss_index++;
1321
                }
1322
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1323
                if(sc->pseudo_stream_id == -1 ||
1324
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1325
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1326
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1327
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1328
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1329
                            current_offset, current_dts, sample_size, distance, keyframe);
1330
                }
1331

    
1332
                current_offset += sample_size;
1333
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1334
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1335
                distance++;
1336
                stts_sample++;
1337
                current_sample++;
1338
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1339
                    stts_sample = 0;
1340
                    stts_index++;
1341
                }
1342
            }
1343
        }
1344
    } else { /* read whole chunk */
1345
        unsigned int chunk_samples, chunk_size, chunk_duration;
1346
        unsigned int frames = 1;
1347
        for (i = 0; i < sc->chunk_count; i++) {
1348
            current_offset = sc->chunk_offsets[i];
1349
            if (stsc_index + 1 < sc->stsc_count &&
1350
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1351
                stsc_index++;
1352
            chunk_samples = sc->stsc_data[stsc_index].count;
1353
            /* get chunk size, beware of alaw/ulaw/mace */
1354
            if (sc->samples_per_frame > 0 &&
1355
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1356
                if (sc->samples_per_frame < 160)
1357
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1358
                else {
1359
                    chunk_size = sc->bytes_per_frame;
1360
                    frames = chunk_samples / sc->samples_per_frame;
1361
                    chunk_samples = sc->samples_per_frame;
1362
                }
1363
            } else
1364
                chunk_size = chunk_samples * sc->sample_size;
1365
            for (j = 0; j < frames; j++) {
1366
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1367
                /* get chunk duration */
1368
                chunk_duration = 0;
1369
                while (chunk_samples > 0) {
1370
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1371
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1372
                        sc->stts_data[stts_index].count -= chunk_samples;
1373
                        break;
1374
                    } else {
1375
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1376
                        chunk_samples -= sc->stts_data[stts_index].count;
1377
                        if (stts_index + 1 < sc->stts_count)
1378
                            stts_index++;
1379
                    }
1380
                }
1381
                current_offset += sc->bytes_per_frame;
1382
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1383
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1384
                        chunk_size, chunk_duration);
1385
                assert(chunk_duration % sc->time_rate == 0);
1386
                current_dts += chunk_duration / sc->time_rate;
1387
            }
1388
        }
1389
    }
1390
}
1391

    
1392
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1393
{
1394
    AVStream *st;
1395
    MOVStreamContext *sc;
1396
    int ret;
1397

    
1398
    st = av_new_stream(c->fc, c->fc->nb_streams);
1399
    if (!st) return AVERROR(ENOMEM);
1400
    sc = av_mallocz(sizeof(MOVStreamContext));
1401
    if (!sc) return AVERROR(ENOMEM);
1402

    
1403
    st->priv_data = sc;
1404
    st->codec->codec_type = CODEC_TYPE_DATA;
1405
    sc->ffindex = st->index;
1406

    
1407
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1408
        return ret;
1409

    
1410
    /* sanity checks */
1411
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1412
                            (!sc->sample_size && !sc->sample_count))) {
1413
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1414
               st->index);
1415
        return 0;
1416
    }
1417

    
1418
    if (!sc->time_rate)
1419
        sc->time_rate = 1;
1420
    if (!sc->time_scale)
1421
        sc->time_scale = c->time_scale;
1422

    
1423
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1424

    
1425
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1426
        !st->codec->frame_size && sc->stts_count == 1) {
1427
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1428
                                           st->codec->sample_rate, sc->time_scale);
1429
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1430
    }
1431

    
1432
    if (st->duration != AV_NOPTS_VALUE) {
1433
        assert(st->duration % sc->time_rate == 0);
1434
        st->duration /= sc->time_rate;
1435
    }
1436

    
1437
    mov_build_index(c, st);
1438

    
1439
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1440
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1441
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1442
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1443
    } else
1444
        sc->pb = c->fc->pb;
1445

    
1446
    switch (st->codec->codec_id) {
1447
#if CONFIG_H261_DECODER
1448
    case CODEC_ID_H261:
1449
#endif
1450
#if CONFIG_H263_DECODER
1451
    case CODEC_ID_H263:
1452
#endif
1453
#if CONFIG_H264_DECODER
1454
    case CODEC_ID_H264:
1455
#endif
1456
#if CONFIG_MPEG4_DECODER
1457
    case CODEC_ID_MPEG4:
1458
#endif
1459
        st->codec->width = 0; /* let decoder init width/height */
1460
        st->codec->height= 0;
1461
        break;
1462
    }
1463

    
1464
    /* Do not need those anymore. */
1465
    av_freep(&sc->chunk_offsets);
1466
    av_freep(&sc->stsc_data);
1467
    av_freep(&sc->sample_sizes);
1468
    av_freep(&sc->keyframes);
1469
    av_freep(&sc->stts_data);
1470

    
1471
    return 0;
1472
}
1473

    
1474
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1475
{
1476
    int ret;
1477
    c->itunes_metadata = 1;
1478
    ret = mov_read_default(c, pb, atom);
1479
    c->itunes_metadata = 0;
1480
    return ret;
1481
}
1482

    
1483
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1484
{
1485
    while (atom.size > 8) {
1486
        uint32_t tag = get_le32(pb);
1487
        atom.size -= 4;
1488
        if (tag == MKTAG('h','d','l','r')) {
1489
            url_fseek(pb, -8, SEEK_CUR);
1490
            atom.size += 8;
1491
            return mov_read_default(c, pb, atom);
1492
        }
1493
    }
1494
    return 0;
1495
}
1496

    
1497
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1498
{
1499
    int i;
1500
    int width;
1501
    int height;
1502
    int64_t disp_transform[2];
1503
    int display_matrix[3][2];
1504
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1505
    MOVStreamContext *sc = st->priv_data;
1506
    int version = get_byte(pb);
1507

    
1508
    get_be24(pb); /* flags */
1509
    /*
1510
    MOV_TRACK_ENABLED 0x0001
1511
    MOV_TRACK_IN_MOVIE 0x0002
1512
    MOV_TRACK_IN_PREVIEW 0x0004
1513
    MOV_TRACK_IN_POSTER 0x0008
1514
    */
1515

    
1516
    if (version == 1) {
1517
        get_be64(pb);
1518
        get_be64(pb);
1519
    } else {
1520
        get_be32(pb); /* creation time */
1521
        get_be32(pb); /* modification time */
1522
    }
1523
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1524
    get_be32(pb); /* reserved */
1525

    
1526
    /* highlevel (considering edits) duration in movie timebase */
1527
    (version == 1) ? get_be64(pb) : get_be32(pb);
1528
    get_be32(pb); /* reserved */
1529
    get_be32(pb); /* reserved */
1530

    
1531
    get_be16(pb); /* layer */
1532
    get_be16(pb); /* alternate group */
1533
    get_be16(pb); /* volume */
1534
    get_be16(pb); /* reserved */
1535

    
1536
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1537
    // they're kept in fixed point format through all calculations
1538
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1539
    for (i = 0; i < 3; i++) {
1540
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1541
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1542
        get_be32(pb);           // 2.30 fixed point (not used)
1543
    }
1544

    
1545
    width = get_be32(pb);       // 16.16 fixed point track width
1546
    height = get_be32(pb);      // 16.16 fixed point track height
1547
    sc->width = width >> 16;
1548
    sc->height = height >> 16;
1549

    
1550
    //transform the display width/height according to the matrix
1551
    // skip this if the display matrix is the default identity matrix
1552
    // to keep the same scale, use [width height 1<<16]
1553
    if (width && height &&
1554
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1555
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1556
        display_matrix[2][0]           || display_matrix[2][1])) {
1557
        for (i = 0; i < 2; i++)
1558
            disp_transform[i] =
1559
                (int64_t)  width  * display_matrix[0][i] +
1560
                (int64_t)  height * display_matrix[1][i] +
1561
                ((int64_t) display_matrix[2][i] << 16);
1562

    
1563
        //sample aspect ratio is new width/height divided by old width/height
1564
        st->sample_aspect_ratio = av_d2q(
1565
            ((double) disp_transform[0] * height) /
1566
            ((double) disp_transform[1] * width), INT_MAX);
1567
    }
1568
    return 0;
1569
}
1570

    
1571
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1572
{
1573
    MOVFragment *frag = &c->fragment;
1574
    MOVTrackExt *trex = NULL;
1575
    int flags, track_id, i;
1576

    
1577
    get_byte(pb); /* version */
1578
    flags = get_be24(pb);
1579

    
1580
    track_id = get_be32(pb);
1581
    if (!track_id)
1582
        return -1;
1583
    frag->track_id = track_id;
1584
    for (i = 0; i < c->trex_count; i++)
1585
        if (c->trex_data[i].track_id == frag->track_id) {
1586
            trex = &c->trex_data[i];
1587
            break;
1588
        }
1589
    if (!trex) {
1590
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1591
        return -1;
1592
    }
1593

    
1594
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1595
    else              frag->base_data_offset = frag->moof_offset;
1596
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1597
    else              frag->stsd_id          = trex->stsd_id;
1598

    
1599
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1600
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1601
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1602
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1603
    return 0;
1604
}
1605

    
1606
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1607
{
1608
    MOVTrackExt *trex;
1609

    
1610
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1611
        return -1;
1612
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1613
    if (!trex)
1614
        return AVERROR(ENOMEM);
1615
    c->trex_data = trex;
1616
    trex = &c->trex_data[c->trex_count++];
1617
    get_byte(pb); /* version */
1618
    get_be24(pb); /* flags */
1619
    trex->track_id = get_be32(pb);
1620
    trex->stsd_id  = get_be32(pb);
1621
    trex->duration = get_be32(pb);
1622
    trex->size     = get_be32(pb);
1623
    trex->flags    = get_be32(pb);
1624
    return 0;
1625
}
1626

    
1627
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1628
{
1629
    MOVFragment *frag = &c->fragment;
1630
    AVStream *st = NULL;
1631
    MOVStreamContext *sc;
1632
    uint64_t offset;
1633
    int64_t dts;
1634
    int data_offset = 0;
1635
    unsigned entries, first_sample_flags = frag->flags;
1636
    int flags, distance, i;
1637

    
1638
    for (i = 0; i < c->fc->nb_streams; i++) {
1639
        if (c->fc->streams[i]->id == frag->track_id) {
1640
            st = c->fc->streams[i];
1641
            break;
1642
        }
1643
    }
1644
    if (!st) {
1645
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1646
        return -1;
1647
    }
1648
    sc = st->priv_data;
1649
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1650
        return 0;
1651
    get_byte(pb); /* version */
1652
    flags = get_be24(pb);
1653
    entries = get_be32(pb);
1654
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1655
    if (flags & 0x001) data_offset        = get_be32(pb);
1656
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1657
    if (flags & 0x800) {
1658
        MOVStts *ctts_data;
1659
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1660
            return -1;
1661
        ctts_data = av_realloc(sc->ctts_data,
1662
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1663
        if (!ctts_data)
1664
            return AVERROR(ENOMEM);
1665
        sc->ctts_data = ctts_data;
1666
    }
1667
    dts = st->duration;
1668
    offset = frag->base_data_offset + data_offset;
1669
    distance = 0;
1670
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1671
    for (i = 0; i < entries; i++) {
1672
        unsigned sample_size = frag->size;
1673
        int sample_flags = i ? frag->flags : first_sample_flags;
1674
        unsigned sample_duration = frag->duration;
1675
        int keyframe;
1676

    
1677
        if (flags & 0x100) sample_duration = get_be32(pb);
1678
        if (flags & 0x200) sample_size     = get_be32(pb);
1679
        if (flags & 0x400) sample_flags    = get_be32(pb);
1680
        if (flags & 0x800) {
1681
            sc->ctts_data[sc->ctts_count].count = 1;
1682
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1683
            sc->ctts_count++;
1684
        }
1685
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1686
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1687
            distance = 0;
1688
        av_add_index_entry(st, offset, dts, sample_size, distance,
1689
                           keyframe ? AVINDEX_KEYFRAME : 0);
1690
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1691
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1692
                offset, dts, sample_size, distance, keyframe);
1693
        distance++;
1694
        assert(sample_duration % sc->time_rate == 0);
1695
        dts += sample_duration / sc->time_rate;
1696
        offset += sample_size;
1697
    }
1698
    frag->moof_offset = offset;
1699
    st->duration = dts;
1700
    return 0;
1701
}
1702

    
1703
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1704
/* like the files created with Adobe Premiere 5.0, for samples see */
1705
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1706
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1707
{
1708
    int err;
1709

    
1710
    if (atom.size < 8)
1711
        return 0; /* continue */
1712
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1713
        url_fskip(pb, atom.size - 4);
1714
        return 0;
1715
    }
1716
    atom.type = get_le32(pb);
1717
    atom.offset += 8;
1718
    atom.size -= 8;
1719
    if (atom.type != MKTAG('m','d','a','t')) {
1720
        url_fskip(pb, atom.size);
1721
        return 0;
1722
    }
1723
    err = mov_read_mdat(c, pb, atom);
1724
    return err;
1725
}
1726

    
1727
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1728
{
1729
#if CONFIG_ZLIB
1730
    ByteIOContext ctx;
1731
    uint8_t *cmov_data;
1732
    uint8_t *moov_data; /* uncompressed data */
1733
    long cmov_len, moov_len;
1734
    int ret = -1;
1735

    
1736
    get_be32(pb); /* dcom atom */
1737
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1738
        return -1;
1739
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1740
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1741
        return -1;
1742
    }
1743
    get_be32(pb); /* cmvd atom */
1744
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1745
        return -1;
1746
    moov_len = get_be32(pb); /* uncompressed size */
1747
    cmov_len = atom.size - 6 * 4;
1748

    
1749
    cmov_data = av_malloc(cmov_len);
1750
    if (!cmov_data)
1751
        return AVERROR(ENOMEM);
1752
    moov_data = av_malloc(moov_len);
1753
    if (!moov_data) {
1754
        av_free(cmov_data);
1755
        return AVERROR(ENOMEM);
1756
    }
1757
    get_buffer(pb, cmov_data, cmov_len);
1758
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1759
        goto free_and_return;
1760
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1761
        goto free_and_return;
1762
    atom.type = MKTAG('m','o','o','v');
1763
    atom.offset = 0;
1764
    atom.size = moov_len;
1765
#ifdef DEBUG
1766
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1767
#endif
1768
    ret = mov_read_default(c, &ctx, atom);
1769
free_and_return:
1770
    av_free(moov_data);
1771
    av_free(cmov_data);
1772
    return ret;
1773
#else
1774
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1775
    return -1;
1776
#endif
1777
}
1778

    
1779
/* edit list atom */
1780
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1781
{
1782
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1783
    int i, edit_count;
1784

    
1785
    get_byte(pb); /* version */
1786
    get_be24(pb); /* flags */
1787
    edit_count = get_be32(pb); /* entries */
1788

    
1789
    for(i=0; i<edit_count; i++){
1790
        int time;
1791
        int duration = get_be32(pb); /* Track duration */
1792
        time = get_be32(pb); /* Media time */
1793
        get_be32(pb); /* Media rate */
1794
        if (i == 0 && time >= -1) {
1795
            sc->time_offset = time != -1 ? time : -duration;
1796
            sc->time_rate = av_gcd(sc->time_rate, FFABS(sc->time_offset));
1797
        }
1798
    }
1799

    
1800
    if(edit_count > 1)
1801
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1802
               "a/v desync might occur, patch welcome\n");
1803

    
1804
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1805
    return 0;
1806
}
1807

    
1808
static const MOVParseTableEntry mov_default_parse_table[] = {
1809
{ MKTAG('a','v','s','s'), mov_read_extradata },
1810
{ MKTAG('c','o','6','4'), mov_read_stco },
1811
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1812
{ MKTAG('d','i','n','f'), mov_read_default },
1813
{ MKTAG('d','r','e','f'), mov_read_dref },
1814
{ MKTAG('e','d','t','s'), mov_read_default },
1815
{ MKTAG('e','l','s','t'), mov_read_elst },
1816
{ MKTAG('e','n','d','a'), mov_read_enda },
1817
{ MKTAG('f','i','e','l'), mov_read_extradata },
1818
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1819
{ MKTAG('g','l','b','l'), mov_read_glbl },
1820
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1821
{ MKTAG('i','l','s','t'), mov_read_ilst },
1822
{ MKTAG('j','p','2','h'), mov_read_extradata },
1823
{ MKTAG('m','d','a','t'), mov_read_mdat },
1824
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1825
{ MKTAG('m','d','i','a'), mov_read_default },
1826
{ MKTAG('m','e','t','a'), mov_read_meta },
1827
{ MKTAG('m','i','n','f'), mov_read_default },
1828
{ MKTAG('m','o','o','f'), mov_read_moof },
1829
{ MKTAG('m','o','o','v'), mov_read_moov },
1830
{ MKTAG('m','v','e','x'), mov_read_default },
1831
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1832
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1833
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1834
{ MKTAG('a','v','c','C'), mov_read_glbl },
1835
{ MKTAG('p','a','s','p'), mov_read_pasp },
1836
{ MKTAG('s','t','b','l'), mov_read_default },
1837
{ MKTAG('s','t','c','o'), mov_read_stco },
1838
{ MKTAG('s','t','s','c'), mov_read_stsc },
1839
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1840
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1841
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1842
{ MKTAG('s','t','t','s'), mov_read_stts },
1843
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
1844
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1845
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1846
{ MKTAG('t','r','a','k'), mov_read_trak },
1847
{ MKTAG('t','r','a','f'), mov_read_default },
1848
{ MKTAG('t','r','e','x'), mov_read_trex },
1849
{ MKTAG('t','r','u','n'), mov_read_trun },
1850
{ MKTAG('u','d','t','a'), mov_read_default },
1851
{ MKTAG('w','a','v','e'), mov_read_wave },
1852
{ MKTAG('e','s','d','s'), mov_read_esds },
1853
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1854
{ MKTAG('c','m','o','v'), mov_read_cmov },
1855
{ 0, NULL }
1856
};
1857

    
1858
static int mov_probe(AVProbeData *p)
1859
{
1860
    unsigned int offset;
1861
    uint32_t tag;
1862
    int score = 0;
1863

    
1864
    /* check file header */
1865
    offset = 0;
1866
    for(;;) {
1867
        /* ignore invalid offset */
1868
        if ((offset + 8) > (unsigned int)p->buf_size)
1869
            return score;
1870
        tag = AV_RL32(p->buf + offset + 4);
1871
        switch(tag) {
1872
        /* check for obvious tags */
1873
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1874
        case MKTAG('m','o','o','v'):
1875
        case MKTAG('m','d','a','t'):
1876
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1877
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1878
        case MKTAG('f','t','y','p'):
1879
            return AVPROBE_SCORE_MAX;
1880
        /* those are more common words, so rate then a bit less */
1881
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1882
        case MKTAG('w','i','d','e'):
1883
        case MKTAG('f','r','e','e'):
1884
        case MKTAG('j','u','n','k'):
1885
        case MKTAG('p','i','c','t'):
1886
            return AVPROBE_SCORE_MAX - 5;
1887
        case MKTAG(0x82,0x82,0x7f,0x7d):
1888
        case MKTAG('s','k','i','p'):
1889
        case MKTAG('u','u','i','d'):
1890
        case MKTAG('p','r','f','l'):
1891
            offset = AV_RB32(p->buf+offset) + offset;
1892
            /* if we only find those cause probedata is too small at least rate them */
1893
            score = AVPROBE_SCORE_MAX - 50;
1894
            break;
1895
        default:
1896
            /* unrecognized tag */
1897
            return score;
1898
        }
1899
    }
1900
    return score;
1901
}
1902

    
1903
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1904
{
1905
    MOVContext *mov = s->priv_data;
1906
    ByteIOContext *pb = s->pb;
1907
    int err;
1908
    MOVAtom atom = { 0, 0, 0 };
1909

    
1910
    mov->fc = s;
1911
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1912
    if(!url_is_streamed(pb))
1913
        atom.size = url_fsize(pb);
1914
    else
1915
        atom.size = INT64_MAX;
1916

    
1917
    /* check MOV header */
1918
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1919
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1920
        return err;
1921
    }
1922
    if (!mov->found_moov) {
1923
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1924
        return -1;
1925
    }
1926
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1927

    
1928
    return 0;
1929
}
1930

    
1931
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1932
{
1933
    MOVContext *mov = s->priv_data;
1934
    MOVStreamContext *sc = 0;
1935
    AVIndexEntry *sample = 0;
1936
    int64_t best_dts = INT64_MAX;
1937
    int i, ret;
1938
 retry:
1939
    for (i = 0; i < s->nb_streams; i++) {
1940
        AVStream *st = s->streams[i];
1941
        MOVStreamContext *msc = st->priv_data;
1942
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
1943
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1944
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1945
                                     AV_TIME_BASE, msc->time_scale);
1946
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1947
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1948
                (!url_is_streamed(s->pb) &&
1949
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1950
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1951
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1952
                sample = current_sample;
1953
                best_dts = dts;
1954
                sc = msc;
1955
            }
1956
        }
1957
    }
1958
    if (!sample) {
1959
        mov->found_mdat = 0;
1960
        if (!url_is_streamed(s->pb) ||
1961
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1962
            url_feof(s->pb))
1963
            return -1;
1964
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1965
        goto retry;
1966
    }
1967
    /* must be done just before reading, to avoid infinite loop on sample */
1968
    sc->current_sample++;
1969
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1970
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1971
               sc->ffindex, sample->pos);
1972
        return -1;
1973
    }
1974
    ret = av_get_packet(sc->pb, pkt, sample->size);
1975
    if (ret < 0)
1976
        return ret;
1977
#if CONFIG_DV_DEMUXER
1978
    if (mov->dv_demux && sc->dv_audio_container) {
1979
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1980
        av_free(pkt->data);
1981
        pkt->size = 0;
1982
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1983
            return -1;
1984
    }
1985
#endif
1986
    pkt->stream_index = sc->ffindex;
1987
    pkt->dts = sample->timestamp;
1988
    if (sc->ctts_data) {
1989
        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
1990
        pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
1991
        /* update ctts context */
1992
        sc->ctts_sample++;
1993
        if (sc->ctts_index < sc->ctts_count &&
1994
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
1995
            sc->ctts_index++;
1996
            sc->ctts_sample = 0;
1997
        }
1998
        if (sc->wrong_dts)
1999
            pkt->dts = AV_NOPTS_VALUE;
2000
    } else {
2001
        AVStream *st = s->streams[sc->ffindex];
2002
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2003
            st->index_entries[sc->current_sample].timestamp : st->duration;
2004
        pkt->duration = next_dts - pkt->dts;
2005
        pkt->pts = pkt->dts;
2006
    }
2007
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
2008
    pkt->pos = sample->pos;
2009
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2010
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2011
    return 0;
2012
}
2013

    
2014
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
2015
{
2016
    MOVStreamContext *sc = st->priv_data;
2017
    int sample, time_sample;
2018
    int i;
2019

    
2020
    sample = av_index_search_timestamp(st, timestamp, flags);
2021
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2022
    if (sample < 0) /* not sure what to do */
2023
        return -1;
2024
    sc->current_sample = sample;
2025
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
2026
    /* adjust ctts index */
2027
    if (sc->ctts_data) {
2028
        time_sample = 0;
2029
        for (i = 0; i < sc->ctts_count; i++) {
2030
            int next = time_sample + sc->ctts_data[i].count;
2031
            if (next > sc->current_sample) {
2032
                sc->ctts_index = i;
2033
                sc->ctts_sample = sc->current_sample - time_sample;
2034
                break;
2035
            }
2036
            time_sample = next;
2037
        }
2038
    }
2039
    return sample;
2040
}
2041

    
2042
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2043
{
2044
    AVStream *st;
2045
    int64_t seek_timestamp, timestamp;
2046
    int sample;
2047
    int i;
2048

    
2049
    if (stream_index >= s->nb_streams)
2050
        return -1;
2051
    if (sample_time < 0)
2052
        sample_time = 0;
2053

    
2054
    st = s->streams[stream_index];
2055
    sample = mov_seek_stream(st, sample_time, flags);
2056
    if (sample < 0)
2057
        return -1;
2058

    
2059
    /* adjust seek timestamp to found sample timestamp */
2060
    seek_timestamp = st->index_entries[sample].timestamp;
2061

    
2062
    for (i = 0; i < s->nb_streams; i++) {
2063
        st = s->streams[i];
2064
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2065
            continue;
2066

    
2067
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2068
        mov_seek_stream(st, timestamp, flags);
2069
    }
2070
    return 0;
2071
}
2072

    
2073
static int mov_read_close(AVFormatContext *s)
2074
{
2075
    MOVContext *mov = s->priv_data;
2076
    int i, j;
2077

    
2078
    for (i = 0; i < s->nb_streams; i++) {
2079
        AVStream *st = s->streams[i];
2080
        MOVStreamContext *sc = st->priv_data;
2081

    
2082
        av_freep(&sc->ctts_data);
2083
        for (j = 0; j < sc->drefs_count; j++)
2084
            av_freep(&sc->drefs[j].path);
2085
        av_freep(&sc->drefs);
2086
        if (sc->pb && sc->pb != s->pb)
2087
            url_fclose(sc->pb);
2088

    
2089
        av_freep(&st->codec->palctrl);
2090
    }
2091

    
2092
    if (mov->dv_demux) {
2093
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2094
            av_freep(&mov->dv_fctx->streams[i]->codec);
2095
            av_freep(&mov->dv_fctx->streams[i]);
2096
        }
2097
        av_freep(&mov->dv_fctx);
2098
        av_freep(&mov->dv_demux);
2099
    }
2100

    
2101
    av_freep(&mov->trex_data);
2102

    
2103
    return 0;
2104
}
2105

    
2106
AVInputFormat mov_demuxer = {
2107
    "mov,mp4,m4a,3gp,3g2,mj2",
2108
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2109
    sizeof(MOVContext),
2110
    mov_probe,
2111
    mov_read_header,
2112
    mov_read_packet,
2113
    mov_read_close,
2114
    mov_read_seek,
2115
};