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ffmpeg / libavformat / mov.c @ f05783c2

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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.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * 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

    
25
//#define DEBUG
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//#define DEBUG_METADATA
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//#define MOV_EXPORT_ALL_METADATA
28

    
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#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

    
37
#if CONFIG_ZLIB
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#include <zlib.h>
39
#endif
40

    
41
/*
42
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
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 *
45
 * Features and limitations:
46
 * - 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 :-)
49
 *
50
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
52
 *
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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:
56
 *  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 :))
59
 */
60

    
61
#include "qtpalette.h"
62

    
63

    
64
#undef NDEBUG
65
#include <assert.h>
66

    
67
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
68

    
69
/* those functions parse an atom */
70
/* return code:
71
  0: continue to parse next atom
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 <0: error occurred, exit
73
*/
74
/* links atom IDs to parse functions */
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typedef struct MOVParseTableEntry {
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    uint32_t type;
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    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
78
} MOVParseTableEntry;
79

    
80
static const MOVParseTableEntry mov_default_parse_table[];
81

    
82
static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
83
{
84
    char buf[16];
85

    
86
    get_be16(pb); // unknown
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    snprintf(buf, sizeof(buf), "%d", get_be16(pb));
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    av_metadata_set(&c->fc->metadata, "track", buf);
89

    
90
    get_be16(pb); // total tracks
91

    
92
    return 0;
93
}
94

    
95
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
96
{
97
#ifdef MOV_EXPORT_ALL_METADATA
98
    char tmp_key[5];
99
#endif
100
    char str[1024], key2[16], language[4] = {0};
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    const char *key = NULL;
102
    uint16_t str_size;
103
    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
104

    
105
    switch (atom.type) {
106
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
107
    case MKTAG(0xa9,'a','u','t'):
108
    case MKTAG(0xa9,'A','R','T'):
109
    case MKTAG(0xa9,'w','r','t'): key = "author";    break;
110
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
111
    case MKTAG(0xa9,'c','m','t'):
112
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
113
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
114
    case MKTAG(0xa9,'d','a','y'): key = "year";      break;
115
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
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    case MKTAG(0xa9,'t','o','o'):
117
    case MKTAG(0xa9,'e','n','c'): key = "muxer";     break;
118
    case MKTAG( 't','r','k','n'): key = "track";
119
        parse = mov_metadata_trkn; break;
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    }
121

    
122
    if (c->itunes_metadata && atom.size > 8) {
123
        int data_size = get_be32(pb);
124
        int tag = get_le32(pb);
125
        if (tag == MKTAG('d','a','t','a')) {
126
            get_be32(pb); // type
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            get_be32(pb); // unknown
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            str_size = data_size - 16;
129
            atom.size -= 16;
130
        } else return 0;
131
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
132
        str_size = get_be16(pb); // string length
133
        ff_mov_lang_to_iso639(get_be16(pb), language);
134
        atom.size -= 4;
135
    } else
136
        str_size = atom.size;
137

    
138
#ifdef MOV_EXPORT_ALL_METADATA
139
    if (!key) {
140
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
141
        key = tmp_key;
142
    }
143
#endif
144

    
145
    if (!key)
146
        return 0;
147
    if (atom.size < 0)
148
        return -1;
149

    
150
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
151

    
152
    if (parse)
153
        parse(c, pb, str_size);
154
    else {
155
        get_buffer(pb, str, str_size);
156
        str[str_size] = 0;
157
        av_metadata_set(&c->fc->metadata, key, str);
158
        if (*language && strcmp(language, "und")) {
159
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
160
            av_metadata_set(&c->fc->metadata, key2, str);
161
        }
162
    }
163
#ifdef DEBUG_METADATA
164
    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
165
    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
166
           key, str, (char*)&atom.type, str_size, atom.size);
167
#endif
168

    
169
    return 0;
170
}
171

    
172
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
173
{
174
    int64_t total_size = 0;
175
    MOVAtom a;
176
    int i;
177
    int err = 0;
178

    
179
    a.offset = atom.offset;
180

    
181
    if (atom.size < 0)
182
        atom.size = INT64_MAX;
183
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
184
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
185
        a.size = atom.size;
186
        a.type=0;
187
        if(atom.size >= 8) {
188
            a.size = get_be32(pb);
189
            a.type = get_le32(pb);
190
        }
191
        total_size += 8;
192
        a.offset += 8;
193
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
194
                a.type, (char*)&a.type, a.size, atom.size, total_size);
195
        if (a.size == 1) { /* 64 bit extended size */
196
            a.size = get_be64(pb) - 8;
197
            a.offset += 8;
198
            total_size += 8;
199
        }
200
        if (a.size == 0) {
201
            a.size = atom.size - total_size;
202
            if (a.size <= 8)
203
                break;
204
        }
205
        a.size -= 8;
206
        if(a.size < 0)
207
            break;
208
        a.size = FFMIN(a.size, atom.size - total_size);
209

    
210
        for (i = 0; mov_default_parse_table[i].type; i++)
211
            if (mov_default_parse_table[i].type == a.type) {
212
                parse = mov_default_parse_table[i].parse;
213
                break;
214
            }
215

    
216
        // container is user data
217
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
218
                       atom.type == MKTAG('i','l','s','t')))
219
            parse = mov_read_udta_string;
220

    
221
        if (!parse) { /* skip leaf atoms data */
222
            url_fskip(pb, a.size);
223
        } else {
224
            int64_t start_pos = url_ftell(pb);
225
            int64_t left;
226
            err = parse(c, pb, a);
227
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
228
                break;
229
            left = a.size - url_ftell(pb) + start_pos;
230
            if (left > 0) /* skip garbage at atom end */
231
                url_fskip(pb, left);
232
        }
233

    
234
        a.offset += a.size;
235
        total_size += a.size;
236
    }
237

    
238
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
239
        url_fskip(pb, atom.size - total_size);
240

    
241
    return err;
242
}
243

    
244
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
245
{
246
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
247
    MOVStreamContext *sc = st->priv_data;
248
    int entries, i, j;
249

    
250
    get_be32(pb); // version + flags
251
    entries = get_be32(pb);
252
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
253
        return -1;
254
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
255
    if (!sc->drefs)
256
        return AVERROR(ENOMEM);
257
    sc->drefs_count = entries;
258

    
259
    for (i = 0; i < sc->drefs_count; i++) {
260
        MOVDref *dref = &sc->drefs[i];
261
        uint32_t size = get_be32(pb);
262
        int64_t next = url_ftell(pb) + size - 4;
263

    
264
        dref->type = get_le32(pb);
265
        get_be32(pb); // version + flags
266
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
267

    
268
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
269
            /* macintosh alias record */
270
            uint16_t volume_len, len;
271
            char volume[28];
272
            int16_t type;
273

    
274
            url_fskip(pb, 10);
275

    
276
            volume_len = get_byte(pb);
277
            volume_len = FFMIN(volume_len, 27);
278
            get_buffer(pb, volume, 27);
279
            volume[volume_len] = 0;
280
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
281

    
282
            url_fskip(pb, 112);
283

    
284
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
285
                type = get_be16(pb);
286
                len = get_be16(pb);
287
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
288
                if (len&1)
289
                    len += 1;
290
                if (type == 2) { // absolute path
291
                    av_free(dref->path);
292
                    dref->path = av_mallocz(len+1);
293
                    if (!dref->path)
294
                        return AVERROR(ENOMEM);
295
                    get_buffer(pb, dref->path, len);
296
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
297
                        len -= volume_len;
298
                        memmove(dref->path, dref->path+volume_len, len);
299
                        dref->path[len] = 0;
300
                    }
301
                    for (j = 0; j < len; j++)
302
                        if (dref->path[j] == ':')
303
                            dref->path[j] = '/';
304
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
305
                } else
306
                    url_fskip(pb, len);
307
            }
308
        }
309
        url_fseek(pb, next, SEEK_SET);
310
    }
311
    return 0;
312
}
313

    
314
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
315
{
316
    AVStream *st;
317
    uint32_t type;
318
    uint32_t ctype;
319

    
320
    if (c->fc->nb_streams < 1) // meta before first trak
321
        return 0;
322

    
323
    st = c->fc->streams[c->fc->nb_streams-1];
324

    
325
    get_byte(pb); /* version */
326
    get_be24(pb); /* flags */
327

    
328
    /* component type */
329
    ctype = get_le32(pb);
330
    type = get_le32(pb); /* component subtype */
331

    
332
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
333
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
334

    
335
    if     (type == MKTAG('v','i','d','e'))
336
        st->codec->codec_type = CODEC_TYPE_VIDEO;
337
    else if(type == MKTAG('s','o','u','n'))
338
        st->codec->codec_type = CODEC_TYPE_AUDIO;
339
    else if(type == MKTAG('m','1','a',' '))
340
        st->codec->codec_id = CODEC_ID_MP2;
341
    else if(type == MKTAG('s','u','b','p'))
342
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
343

    
344
    get_be32(pb); /* component  manufacture */
345
    get_be32(pb); /* component flags */
346
    get_be32(pb); /* component flags mask */
347

    
348
    if(atom.size <= 24)
349
        return 0; /* nothing left to read */
350

    
351
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
352
    return 0;
353
}
354

    
355
static int mp4_read_descr_len(ByteIOContext *pb)
356
{
357
    int len = 0;
358
    int count = 4;
359
    while (count--) {
360
        int c = get_byte(pb);
361
        len = (len << 7) | (c & 0x7f);
362
        if (!(c & 0x80))
363
            break;
364
    }
365
    return len;
366
}
367

    
368
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
369
{
370
    int len;
371
    *tag = get_byte(pb);
372
    len = mp4_read_descr_len(pb);
373
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
374
    return len;
375
}
376

    
377
#define MP4ESDescrTag                   0x03
378
#define MP4DecConfigDescrTag            0x04
379
#define MP4DecSpecificDescrTag          0x05
380

    
381
static const AVCodecTag mp4_audio_types[] = {
382
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
383
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
384
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
385
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
386
    { CODEC_ID_NONE,    0 },
387
};
388

    
389
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
390
{
391
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
392
    int tag, len;
393

    
394
    get_be32(pb); /* version + flags */
395
    len = mp4_read_descr(c, pb, &tag);
396
    if (tag == MP4ESDescrTag) {
397
        get_be16(pb); /* ID */
398
        get_byte(pb); /* priority */
399
    } else
400
        get_be16(pb); /* ID */
401

    
402
    len = mp4_read_descr(c, pb, &tag);
403
    if (tag == MP4DecConfigDescrTag) {
404
        int object_type_id = get_byte(pb);
405
        get_byte(pb); /* stream type */
406
        get_be24(pb); /* buffer size db */
407
        get_be32(pb); /* max bitrate */
408
        get_be32(pb); /* avg bitrate */
409

    
410
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
411
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
412
        len = mp4_read_descr(c, pb, &tag);
413
        if (tag == MP4DecSpecificDescrTag) {
414
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
415
            if((uint64_t)len > (1<<30))
416
                return -1;
417
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
418
            if (!st->codec->extradata)
419
                return AVERROR(ENOMEM);
420
            get_buffer(pb, st->codec->extradata, len);
421
            st->codec->extradata_size = len;
422
            if (st->codec->codec_id == CODEC_ID_AAC) {
423
                MPEG4AudioConfig cfg;
424
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
425
                                         st->codec->extradata_size);
426
                if (cfg.chan_config > 7)
427
                    return -1;
428
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
429
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
430
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
431
                else
432
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
433
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
434
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
435
                        cfg.object_type, cfg.ext_object_type,
436
                        cfg.sample_rate, cfg.ext_sample_rate);
437
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
438
                                                         cfg.object_type)))
439
                    st->codec->codec_id = CODEC_ID_AAC;
440
            }
441
        }
442
    }
443
    return 0;
444
}
445

    
446
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
447
{
448
    const int num = get_be32(pb);
449
    const int den = get_be32(pb);
450
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
451
    if (den != 0) {
452
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
453
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
454
            av_log(c->fc, AV_LOG_WARNING,
455
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
456
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
457
        st->sample_aspect_ratio.num = num;
458
        st->sample_aspect_ratio.den = den;
459
    }
460
    return 0;
461
}
462

    
463
/* this atom contains actual media data */
464
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
465
{
466
    if(atom.size == 0) /* wrong one (MP4) */
467
        return 0;
468
    c->found_mdat=1;
469
    return 0; /* now go for moov */
470
}
471

    
472
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
473
{
474
    uint32_t type = get_le32(pb);
475

    
476
    if (type != MKTAG('q','t',' ',' '))
477
        c->isom = 1;
478
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
479
    get_be32(pb); /* minor version */
480
    url_fskip(pb, atom.size - 8);
481
    return 0;
482
}
483

    
484
/* this atom should contain all header atoms */
485
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
486
{
487
    if (mov_read_default(c, pb, atom) < 0)
488
        return -1;
489
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
490
    /* so we don't parse the whole file if over a network */
491
    c->found_moov=1;
492
    return 0; /* now go for mdat */
493
}
494

    
495
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
496
{
497
    c->fragment.moof_offset = url_ftell(pb) - 8;
498
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
499
    return mov_read_default(c, pb, atom);
500
}
501

    
502
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
503
{
504
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
505
    MOVStreamContext *sc = st->priv_data;
506
    int version = get_byte(pb);
507
    char language[4] = {0};
508
    unsigned lang;
509

    
510
    if (version > 1)
511
        return -1; /* unsupported */
512

    
513
    get_be24(pb); /* flags */
514
    if (version == 1) {
515
        get_be64(pb);
516
        get_be64(pb);
517
    } else {
518
        get_be32(pb); /* creation time */
519
        get_be32(pb); /* modification time */
520
    }
521

    
522
    sc->time_scale = get_be32(pb);
523
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
524

    
525
    lang = get_be16(pb); /* language */
526
    if (ff_mov_lang_to_iso639(lang, language))
527
        av_metadata_set(&st->metadata, "language", language);
528
    get_be16(pb); /* quality */
529

    
530
    return 0;
531
}
532

    
533
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
534
{
535
    int version = get_byte(pb); /* version */
536
    get_be24(pb); /* flags */
537

    
538
    if (version == 1) {
539
        get_be64(pb);
540
        get_be64(pb);
541
    } else {
542
        get_be32(pb); /* creation time */
543
        get_be32(pb); /* modification time */
544
    }
545
    c->time_scale = get_be32(pb); /* time scale */
546

    
547
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
548

    
549
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
550
    get_be32(pb); /* preferred scale */
551

    
552
    get_be16(pb); /* preferred volume */
553

    
554
    url_fskip(pb, 10); /* reserved */
555

    
556
    url_fskip(pb, 36); /* display matrix */
557

    
558
    get_be32(pb); /* preview time */
559
    get_be32(pb); /* preview duration */
560
    get_be32(pb); /* poster time */
561
    get_be32(pb); /* selection time */
562
    get_be32(pb); /* selection duration */
563
    get_be32(pb); /* current time */
564
    get_be32(pb); /* next track ID */
565

    
566
    return 0;
567
}
568

    
569
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
570
{
571
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
572

    
573
    if((uint64_t)atom.size > (1<<30))
574
        return -1;
575

    
576
    // currently SVQ3 decoder expect full STSD header - so let's fake it
577
    // this should be fixed and just SMI header should be passed
578
    av_free(st->codec->extradata);
579
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
580
    if (!st->codec->extradata)
581
        return AVERROR(ENOMEM);
582
    st->codec->extradata_size = 0x5a + atom.size;
583
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
584
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
585
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
586
    return 0;
587
}
588

    
589
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
590
{
591
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
592
    int little_endian = get_be16(pb);
593

    
594
    dprintf(c->fc, "enda %d\n", little_endian);
595
    if (little_endian == 1) {
596
        switch (st->codec->codec_id) {
597
        case CODEC_ID_PCM_S24BE:
598
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
599
            break;
600
        case CODEC_ID_PCM_S32BE:
601
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
602
            break;
603
        case CODEC_ID_PCM_F32BE:
604
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
605
            break;
606
        case CODEC_ID_PCM_F64BE:
607
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
608
            break;
609
        default:
610
            break;
611
        }
612
    }
613
    return 0;
614
}
615

    
616
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
617
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
618
{
619
    AVStream *st;
620
    uint64_t size;
621
    uint8_t *buf;
622

    
623
    if (c->fc->nb_streams < 1) // will happen with jp2 files
624
        return 0;
625
    st= c->fc->streams[c->fc->nb_streams-1];
626
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
627
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
628
        return -1;
629
    buf= av_realloc(st->codec->extradata, size);
630
    if(!buf)
631
        return -1;
632
    st->codec->extradata= buf;
633
    buf+= st->codec->extradata_size;
634
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
635
    AV_WB32(       buf    , atom.size + 8);
636
    AV_WL32(       buf + 4, atom.type);
637
    get_buffer(pb, buf + 8, atom.size);
638
    return 0;
639
}
640

    
641
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
642
{
643
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
644

    
645
    if((uint64_t)atom.size > (1<<30))
646
        return -1;
647

    
648
    if (st->codec->codec_id == CODEC_ID_QDM2) {
649
        // pass all frma atom to codec, needed at least for QDM2
650
        av_free(st->codec->extradata);
651
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
652
        if (!st->codec->extradata)
653
            return AVERROR(ENOMEM);
654
        st->codec->extradata_size = atom.size;
655
        get_buffer(pb, st->codec->extradata, atom.size);
656
    } else if (atom.size > 8) { /* to read frma, esds atoms */
657
        if (mov_read_default(c, pb, atom) < 0)
658
            return -1;
659
    } else
660
        url_fskip(pb, atom.size);
661
    return 0;
662
}
663

    
664
/**
665
 * This function reads atom content and puts data in extradata without tag
666
 * nor size unlike mov_read_extradata.
667
 */
668
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
669
{
670
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
671

    
672
    if((uint64_t)atom.size > (1<<30))
673
        return -1;
674

    
675
    av_free(st->codec->extradata);
676
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
677
    if (!st->codec->extradata)
678
        return AVERROR(ENOMEM);
679
    st->codec->extradata_size = atom.size;
680
    get_buffer(pb, st->codec->extradata, atom.size);
681
    return 0;
682
}
683

    
684
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
685
{
686
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
687
    MOVStreamContext *sc = st->priv_data;
688
    unsigned int i, entries;
689

    
690
    get_byte(pb); /* version */
691
    get_be24(pb); /* flags */
692

    
693
    entries = get_be32(pb);
694

    
695
    if(entries >= UINT_MAX/sizeof(int64_t))
696
        return -1;
697

    
698
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
699
    if (!sc->chunk_offsets)
700
        return AVERROR(ENOMEM);
701
    sc->chunk_count = entries;
702

    
703
    if      (atom.type == MKTAG('s','t','c','o'))
704
        for(i=0; i<entries; i++)
705
            sc->chunk_offsets[i] = get_be32(pb);
706
    else if (atom.type == MKTAG('c','o','6','4'))
707
        for(i=0; i<entries; i++)
708
            sc->chunk_offsets[i] = get_be64(pb);
709
    else
710
        return -1;
711

    
712
    return 0;
713
}
714

    
715
/**
716
 * Compute codec id for 'lpcm' tag.
717
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
718
 */
719
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
720
{
721
    if (flags & 1) { // floating point
722
        if (flags & 2) { // big endian
723
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
724
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
725
        } else {
726
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
727
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
728
        }
729
    } else {
730
        if (flags & 2) {
731
            if      (bps == 8)
732
                // signed integer
733
                if (flags & 4)  return CODEC_ID_PCM_S8;
734
                else            return CODEC_ID_PCM_U8;
735
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
736
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
737
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
738
        } else {
739
            if      (bps == 8)
740
                if (flags & 4)  return CODEC_ID_PCM_S8;
741
                else            return CODEC_ID_PCM_U8;
742
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
743
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
744
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
745
        }
746
    }
747
    return CODEC_ID_NONE;
748
}
749

    
750
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
751
{
752
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
753
    MOVStreamContext *sc = st->priv_data;
754
    int j, entries, pseudo_stream_id;
755

    
756
    get_byte(pb); /* version */
757
    get_be24(pb); /* flags */
758

    
759
    entries = get_be32(pb);
760

    
761
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
762
        //Parsing Sample description table
763
        enum CodecID id;
764
        int dref_id;
765
        MOVAtom a = { 0, 0, 0 };
766
        int64_t start_pos = url_ftell(pb);
767
        int size = get_be32(pb); /* size */
768
        uint32_t format = get_le32(pb); /* data format */
769

    
770
        get_be32(pb); /* reserved */
771
        get_be16(pb); /* reserved */
772
        dref_id = get_be16(pb);
773

    
774
        if (st->codec->codec_tag &&
775
            st->codec->codec_tag != format &&
776
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
777
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
778
           ){
779
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
780
             * export it as a separate AVStream but this needs a few changes
781
             * in the MOV demuxer, patch welcome. */
782
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
783
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
784
            continue;
785
        }
786
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
787
        sc->dref_id= dref_id;
788

    
789
        st->codec->codec_tag = format;
790
        id = codec_get_id(codec_movaudio_tags, format);
791
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
792
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
793

    
794
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
795
            st->codec->codec_type = CODEC_TYPE_AUDIO;
796
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
797
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
798
            id = codec_get_id(codec_movvideo_tags, format);
799
            if (id <= 0)
800
                id = codec_get_id(codec_bmp_tags, format);
801
            if (id > 0)
802
                st->codec->codec_type = CODEC_TYPE_VIDEO;
803
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
804
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
805
                if(id > 0)
806
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
807
            }
808
        }
809

    
810
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
811
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
812
                (format >> 24) & 0xff, st->codec->codec_type);
813

    
814
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
815
            uint8_t codec_name[32];
816
            unsigned int color_depth;
817
            int color_greyscale;
818

    
819
            st->codec->codec_id = id;
820
            get_be16(pb); /* version */
821
            get_be16(pb); /* revision level */
822
            get_be32(pb); /* vendor */
823
            get_be32(pb); /* temporal quality */
824
            get_be32(pb); /* spatial quality */
825

    
826
            st->codec->width = get_be16(pb); /* width */
827
            st->codec->height = get_be16(pb); /* height */
828

    
829
            get_be32(pb); /* horiz resolution */
830
            get_be32(pb); /* vert resolution */
831
            get_be32(pb); /* data size, always 0 */
832
            get_be16(pb); /* frames per samples */
833

    
834
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
835
            if (codec_name[0] <= 31) {
836
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
837
                st->codec->codec_name[codec_name[0]] = 0;
838
            }
839

    
840
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
841
            st->codec->color_table_id = get_be16(pb); /* colortable id */
842
            dprintf(c->fc, "depth %d, ctab id %d\n",
843
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
844
            /* figure out the palette situation */
845
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
846
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
847

    
848
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
849
            if ((color_depth == 2) || (color_depth == 4) ||
850
                (color_depth == 8)) {
851
                /* for palette traversal */
852
                unsigned int color_start, color_count, color_end;
853
                unsigned char r, g, b;
854

    
855
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
856
                if (color_greyscale) {
857
                    int color_index, color_dec;
858
                    /* compute the greyscale palette */
859
                    st->codec->bits_per_coded_sample = color_depth;
860
                    color_count = 1 << color_depth;
861
                    color_index = 255;
862
                    color_dec = 256 / (color_count - 1);
863
                    for (j = 0; j < color_count; j++) {
864
                        r = g = b = color_index;
865
                        st->codec->palctrl->palette[j] =
866
                            (r << 16) | (g << 8) | (b);
867
                        color_index -= color_dec;
868
                        if (color_index < 0)
869
                            color_index = 0;
870
                    }
871
                } else if (st->codec->color_table_id) {
872
                    const uint8_t *color_table;
873
                    /* if flag bit 3 is set, use the default palette */
874
                    color_count = 1 << color_depth;
875
                    if (color_depth == 2)
876
                        color_table = ff_qt_default_palette_4;
877
                    else if (color_depth == 4)
878
                        color_table = ff_qt_default_palette_16;
879
                    else
880
                        color_table = ff_qt_default_palette_256;
881

    
882
                    for (j = 0; j < color_count; j++) {
883
                        r = color_table[j * 4 + 0];
884
                        g = color_table[j * 4 + 1];
885
                        b = color_table[j * 4 + 2];
886
                        st->codec->palctrl->palette[j] =
887
                            (r << 16) | (g << 8) | (b);
888
                    }
889
                } else {
890
                    /* load the palette from the file */
891
                    color_start = get_be32(pb);
892
                    color_count = get_be16(pb);
893
                    color_end = get_be16(pb);
894
                    if ((color_start <= 255) &&
895
                        (color_end <= 255)) {
896
                        for (j = color_start; j <= color_end; j++) {
897
                            /* each R, G, or B component is 16 bits;
898
                             * only use the top 8 bits; skip alpha bytes
899
                             * up front */
900
                            get_byte(pb);
901
                            get_byte(pb);
902
                            r = get_byte(pb);
903
                            get_byte(pb);
904
                            g = get_byte(pb);
905
                            get_byte(pb);
906
                            b = get_byte(pb);
907
                            get_byte(pb);
908
                            st->codec->palctrl->palette[j] =
909
                                (r << 16) | (g << 8) | (b);
910
                        }
911
                    }
912
                }
913
                st->codec->palctrl->palette_changed = 1;
914
            }
915
        } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {
916
            int bits_per_sample, flags;
917
            uint16_t version = get_be16(pb);
918

    
919
            st->codec->codec_id = id;
920
            get_be16(pb); /* revision level */
921
            get_be32(pb); /* vendor */
922

    
923
            st->codec->channels = get_be16(pb);             /* channel count */
924
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
925
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
926

    
927
            sc->audio_cid = get_be16(pb);
928
            get_be16(pb); /* packet size = 0 */
929

    
930
            st->codec->sample_rate = ((get_be32(pb) >> 16));
931

    
932
            //Read QT version 1 fields. In version 0 these do not exist.
933
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
934
            if(!c->isom) {
935
                if(version==1) {
936
                    sc->samples_per_frame = get_be32(pb);
937
                    get_be32(pb); /* bytes per packet */
938
                    sc->bytes_per_frame = get_be32(pb);
939
                    get_be32(pb); /* bytes per sample */
940
                } else if(version==2) {
941
                    get_be32(pb); /* sizeof struct only */
942
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
943
                    st->codec->channels = get_be32(pb);
944
                    get_be32(pb); /* always 0x7F000000 */
945
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
946
                    flags = get_be32(pb); /* lcpm format specific flag */
947
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
948
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
949
                    if (format == MKTAG('l','p','c','m'))
950
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
951
                }
952
            }
953

    
954
            switch (st->codec->codec_id) {
955
            case CODEC_ID_PCM_S8:
956
            case CODEC_ID_PCM_U8:
957
                if (st->codec->bits_per_coded_sample == 16)
958
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
959
                break;
960
            case CODEC_ID_PCM_S16LE:
961
            case CODEC_ID_PCM_S16BE:
962
                if (st->codec->bits_per_coded_sample == 8)
963
                    st->codec->codec_id = CODEC_ID_PCM_S8;
964
                else if (st->codec->bits_per_coded_sample == 24)
965
                    st->codec->codec_id =
966
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
967
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
968
                break;
969
            /* set values for old format before stsd version 1 appeared */
970
            case CODEC_ID_MACE3:
971
                sc->samples_per_frame = 6;
972
                sc->bytes_per_frame = 2*st->codec->channels;
973
                break;
974
            case CODEC_ID_MACE6:
975
                sc->samples_per_frame = 6;
976
                sc->bytes_per_frame = 1*st->codec->channels;
977
                break;
978
            case CODEC_ID_ADPCM_IMA_QT:
979
                sc->samples_per_frame = 64;
980
                sc->bytes_per_frame = 34*st->codec->channels;
981
                break;
982
            case CODEC_ID_GSM:
983
                sc->samples_per_frame = 160;
984
                sc->bytes_per_frame = 33;
985
                break;
986
            default:
987
                break;
988
            }
989

    
990
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
991
            if (bits_per_sample) {
992
                st->codec->bits_per_coded_sample = bits_per_sample;
993
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
994
            }
995
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
996
            // ttxt stsd contains display flags, justification, background
997
            // color, fonts, and default styles, so fake an atom to read it
998
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
999
            mov_read_glbl(c, pb, fake_atom);
1000
            st->codec->codec_id= id;
1001
            st->codec->width = sc->width;
1002
            st->codec->height = sc->height;
1003
        } else {
1004
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1005
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1006
        }
1007
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1008
        a.size = size - (url_ftell(pb) - start_pos);
1009
        if (a.size > 8) {
1010
            if (mov_read_default(c, pb, a) < 0)
1011
                return -1;
1012
        } else if (a.size > 0)
1013
            url_fskip(pb, a.size);
1014
    }
1015

    
1016
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1017
        st->codec->sample_rate= sc->time_scale;
1018

    
1019
    /* special codec parameters handling */
1020
    switch (st->codec->codec_id) {
1021
#if CONFIG_DV_DEMUXER
1022
    case CODEC_ID_DVAUDIO:
1023
        c->dv_fctx = avformat_alloc_context();
1024
        c->dv_demux = dv_init_demux(c->dv_fctx);
1025
        if (!c->dv_demux) {
1026
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1027
            return -1;
1028
        }
1029
        sc->dv_audio_container = 1;
1030
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1031
        break;
1032
#endif
1033
    /* no ifdef since parameters are always those */
1034
    case CODEC_ID_QCELP:
1035
        st->codec->frame_size= 160;
1036
        st->codec->channels= 1; /* really needed */
1037
        break;
1038
    case CODEC_ID_AMR_NB:
1039
    case CODEC_ID_AMR_WB:
1040
        st->codec->frame_size= sc->samples_per_frame;
1041
        st->codec->channels= 1; /* really needed */
1042
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1043
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1044
            st->codec->sample_rate = 8000;
1045
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1046
            st->codec->sample_rate = 16000;
1047
        break;
1048
    case CODEC_ID_MP2:
1049
    case CODEC_ID_MP3:
1050
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1051
        st->need_parsing = AVSTREAM_PARSE_FULL;
1052
        break;
1053
    case CODEC_ID_GSM:
1054
    case CODEC_ID_ADPCM_MS:
1055
    case CODEC_ID_ADPCM_IMA_WAV:
1056
        st->codec->block_align = sc->bytes_per_frame;
1057
        break;
1058
    case CODEC_ID_ALAC:
1059
        if (st->codec->extradata_size == 36) {
1060
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1061
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1062
        }
1063
        break;
1064
    default:
1065
        break;
1066
    }
1067

    
1068
    return 0;
1069
}
1070

    
1071
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1072
{
1073
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1074
    MOVStreamContext *sc = st->priv_data;
1075
    unsigned int i, entries;
1076

    
1077
    get_byte(pb); /* version */
1078
    get_be24(pb); /* flags */
1079

    
1080
    entries = get_be32(pb);
1081

    
1082
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1083

    
1084
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1085
        return -1;
1086
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1087
    if (!sc->stsc_data)
1088
        return AVERROR(ENOMEM);
1089
    sc->stsc_count = entries;
1090

    
1091
    for(i=0; i<entries; i++) {
1092
        sc->stsc_data[i].first = get_be32(pb);
1093
        sc->stsc_data[i].count = get_be32(pb);
1094
        sc->stsc_data[i].id = get_be32(pb);
1095
    }
1096
    return 0;
1097
}
1098

    
1099
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1100
{
1101
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1102
    MOVStreamContext *sc = st->priv_data;
1103
    unsigned int i, entries;
1104

    
1105
    get_byte(pb); /* version */
1106
    get_be24(pb); /* flags */
1107

    
1108
    entries = get_be32(pb);
1109

    
1110
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1111

    
1112
    if(entries >= UINT_MAX / sizeof(int))
1113
        return -1;
1114
    sc->keyframes = av_malloc(entries * sizeof(int));
1115
    if (!sc->keyframes)
1116
        return AVERROR(ENOMEM);
1117
    sc->keyframe_count = entries;
1118

    
1119
    for(i=0; i<entries; i++) {
1120
        sc->keyframes[i] = get_be32(pb);
1121
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1122
    }
1123
    return 0;
1124
}
1125

    
1126
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1127
{
1128
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1129
    MOVStreamContext *sc = st->priv_data;
1130
    unsigned int i, entries, sample_size;
1131

    
1132
    get_byte(pb); /* version */
1133
    get_be24(pb); /* flags */
1134

    
1135
    sample_size = get_be32(pb);
1136
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1137
        sc->sample_size = sample_size;
1138
    entries = get_be32(pb);
1139

    
1140
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1141

    
1142
    sc->sample_count = entries;
1143
    if (sample_size)
1144
        return 0;
1145

    
1146
    if(entries >= UINT_MAX / sizeof(int))
1147
        return -1;
1148
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1149
    if (!sc->sample_sizes)
1150
        return AVERROR(ENOMEM);
1151

    
1152
    for(i=0; i<entries; i++)
1153
        sc->sample_sizes[i] = get_be32(pb);
1154
    return 0;
1155
}
1156

    
1157
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1158
{
1159
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1160
    MOVStreamContext *sc = st->priv_data;
1161
    unsigned int i, entries;
1162
    int64_t duration=0;
1163
    int64_t total_sample_count=0;
1164

    
1165
    get_byte(pb); /* version */
1166
    get_be24(pb); /* flags */
1167
    entries = get_be32(pb);
1168

    
1169
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1170

    
1171
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1172
        return -1;
1173
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1174
    if (!sc->stts_data)
1175
        return AVERROR(ENOMEM);
1176
    sc->stts_count = entries;
1177

    
1178
    for(i=0; i<entries; i++) {
1179
        int sample_duration;
1180
        int sample_count;
1181

    
1182
        sample_count=get_be32(pb);
1183
        sample_duration = get_be32(pb);
1184
        sc->stts_data[i].count= sample_count;
1185
        sc->stts_data[i].duration= sample_duration;
1186

    
1187
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1188

    
1189
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1190

    
1191
        duration+=(int64_t)sample_duration*sample_count;
1192
        total_sample_count+=sample_count;
1193
    }
1194

    
1195
    st->nb_frames= total_sample_count;
1196
    if(duration)
1197
        st->duration= duration;
1198
    return 0;
1199
}
1200

    
1201
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1202
{
1203
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1204
    MOVStreamContext *sc = st->priv_data;
1205
    unsigned int i, entries;
1206

    
1207
    get_byte(pb); /* version */
1208
    get_be24(pb); /* flags */
1209
    entries = get_be32(pb);
1210

    
1211
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1212

    
1213
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1214
        return -1;
1215
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1216
    if (!sc->ctts_data)
1217
        return AVERROR(ENOMEM);
1218
    sc->ctts_count = entries;
1219

    
1220
    for(i=0; i<entries; i++) {
1221
        int count    =get_be32(pb);
1222
        int duration =get_be32(pb);
1223

    
1224
        if (duration < 0) {
1225
            sc->wrong_dts = 1;
1226
            st->codec->has_b_frames = 1;
1227
        }
1228
        sc->ctts_data[i].count   = count;
1229
        sc->ctts_data[i].duration= duration;
1230

    
1231
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1232
    }
1233
    return 0;
1234
}
1235

    
1236
static void mov_build_index(MOVContext *mov, AVStream *st)
1237
{
1238
    MOVStreamContext *sc = st->priv_data;
1239
    int64_t current_offset;
1240
    int64_t current_dts = 0;
1241
    unsigned int stts_index = 0;
1242
    unsigned int stsc_index = 0;
1243
    unsigned int stss_index = 0;
1244
    unsigned int i, j;
1245

    
1246
    /* adjust first dts according to edit list */
1247
    if (sc->time_offset) {
1248
        assert(sc->time_offset % sc->time_rate == 0);
1249
        current_dts = - (sc->time_offset / sc->time_rate);
1250
    }
1251

    
1252
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1253
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1254
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1255
        unsigned int current_sample = 0;
1256
        unsigned int stts_sample = 0;
1257
        unsigned int keyframe, sample_size;
1258
        unsigned int distance = 0;
1259
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1260

    
1261
        st->nb_frames = sc->sample_count;
1262
        for (i = 0; i < sc->chunk_count; i++) {
1263
            current_offset = sc->chunk_offsets[i];
1264
            if (stsc_index + 1 < sc->stsc_count &&
1265
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1266
                stsc_index++;
1267
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1268
                if (current_sample >= sc->sample_count) {
1269
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1270
                    return;
1271
                }
1272
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1273
                if (keyframe) {
1274
                    distance = 0;
1275
                    if (stss_index + 1 < sc->keyframe_count)
1276
                        stss_index++;
1277
                }
1278
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1279
                if(sc->pseudo_stream_id == -1 ||
1280
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1281
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1282
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1283
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1284
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1285
                            current_offset, current_dts, sample_size, distance, keyframe);
1286
                }
1287

    
1288
                current_offset += sample_size;
1289
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1290
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1291
                distance++;
1292
                stts_sample++;
1293
                current_sample++;
1294
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1295
                    stts_sample = 0;
1296
                    stts_index++;
1297
                }
1298
            }
1299
        }
1300
    } else { /* read whole chunk */
1301
        unsigned int chunk_samples, chunk_size, chunk_duration;
1302
        unsigned int frames = 1;
1303
        for (i = 0; i < sc->chunk_count; i++) {
1304
            current_offset = sc->chunk_offsets[i];
1305
            if (stsc_index + 1 < sc->stsc_count &&
1306
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1307
                stsc_index++;
1308
            chunk_samples = sc->stsc_data[stsc_index].count;
1309
            /* get chunk size, beware of alaw/ulaw/mace */
1310
            if (sc->samples_per_frame > 0 &&
1311
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1312
                if (sc->samples_per_frame < 160)
1313
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1314
                else {
1315
                    chunk_size = sc->bytes_per_frame;
1316
                    frames = chunk_samples / sc->samples_per_frame;
1317
                    chunk_samples = sc->samples_per_frame;
1318
                }
1319
            } else
1320
                chunk_size = chunk_samples * sc->sample_size;
1321
            for (j = 0; j < frames; j++) {
1322
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1323
                /* get chunk duration */
1324
                chunk_duration = 0;
1325
                while (chunk_samples > 0) {
1326
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1327
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1328
                        sc->stts_data[stts_index].count -= chunk_samples;
1329
                        break;
1330
                    } else {
1331
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1332
                        chunk_samples -= sc->stts_data[stts_index].count;
1333
                        if (stts_index + 1 < sc->stts_count)
1334
                            stts_index++;
1335
                    }
1336
                }
1337
                current_offset += sc->bytes_per_frame;
1338
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1339
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1340
                        chunk_size, chunk_duration);
1341
                assert(chunk_duration % sc->time_rate == 0);
1342
                current_dts += chunk_duration / sc->time_rate;
1343
            }
1344
        }
1345
    }
1346
}
1347

    
1348
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1349
{
1350
    AVStream *st;
1351
    MOVStreamContext *sc;
1352
    int ret;
1353

    
1354
    st = av_new_stream(c->fc, c->fc->nb_streams);
1355
    if (!st) return AVERROR(ENOMEM);
1356
    sc = av_mallocz(sizeof(MOVStreamContext));
1357
    if (!sc) return AVERROR(ENOMEM);
1358

    
1359
    st->priv_data = sc;
1360
    st->codec->codec_type = CODEC_TYPE_DATA;
1361
    sc->ffindex = st->index;
1362

    
1363
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1364
        return ret;
1365

    
1366
    /* sanity checks */
1367
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1368
                            (!sc->sample_size && !sc->sample_count))) {
1369
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1370
               st->index);
1371
        return 0;
1372
    }
1373

    
1374
    if (!sc->time_rate)
1375
        sc->time_rate = 1;
1376
    if (!sc->time_scale)
1377
        sc->time_scale = c->time_scale;
1378

    
1379
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1380

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

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

    
1393
    mov_build_index(c, st);
1394

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

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

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

    
1424
    return 0;
1425
}
1426

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

    
1436
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1437
{
1438
    while (atom.size > 8) {
1439
        uint32_t tag = get_le32(pb);
1440
        atom.size -= 4;
1441
        if (tag == MKTAG('h','d','l','r')) {
1442
            url_fseek(pb, -8, SEEK_CUR);
1443
            atom.size += 8;
1444
            return mov_read_default(c, pb, atom);
1445
        }
1446
    }
1447
    return 0;
1448
}
1449

    
1450
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1451
{
1452
    int i;
1453
    int width;
1454
    int height;
1455
    int64_t disp_transform[2];
1456
    int display_matrix[3][2];
1457
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1458
    MOVStreamContext *sc = st->priv_data;
1459
    int version = get_byte(pb);
1460

    
1461
    get_be24(pb); /* flags */
1462
    /*
1463
    MOV_TRACK_ENABLED 0x0001
1464
    MOV_TRACK_IN_MOVIE 0x0002
1465
    MOV_TRACK_IN_PREVIEW 0x0004
1466
    MOV_TRACK_IN_POSTER 0x0008
1467
    */
1468

    
1469
    if (version == 1) {
1470
        get_be64(pb);
1471
        get_be64(pb);
1472
    } else {
1473
        get_be32(pb); /* creation time */
1474
        get_be32(pb); /* modification time */
1475
    }
1476
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1477
    get_be32(pb); /* reserved */
1478

    
1479
    /* highlevel (considering edits) duration in movie timebase */
1480
    (version == 1) ? get_be64(pb) : get_be32(pb);
1481
    get_be32(pb); /* reserved */
1482
    get_be32(pb); /* reserved */
1483

    
1484
    get_be16(pb); /* layer */
1485
    get_be16(pb); /* alternate group */
1486
    get_be16(pb); /* volume */
1487
    get_be16(pb); /* reserved */
1488

    
1489
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1490
    // they're kept in fixed point format through all calculations
1491
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1492
    for (i = 0; i < 3; i++) {
1493
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1494
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1495
        get_be32(pb);           // 2.30 fixed point (not used)
1496
    }
1497

    
1498
    width = get_be32(pb);       // 16.16 fixed point track width
1499
    height = get_be32(pb);      // 16.16 fixed point track height
1500
    sc->width = width >> 16;
1501
    sc->height = height >> 16;
1502

    
1503
    //transform the display width/height according to the matrix
1504
    // skip this if the display matrix is the default identity matrix
1505
    // to keep the same scale, use [width height 1<<16]
1506
    if (width && height &&
1507
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1508
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1509
        display_matrix[2][0]           || display_matrix[2][1])) {
1510
        for (i = 0; i < 2; i++)
1511
            disp_transform[i] =
1512
                (int64_t)  width  * display_matrix[0][i] +
1513
                (int64_t)  height * display_matrix[1][i] +
1514
                ((int64_t) display_matrix[2][i] << 16);
1515

    
1516
        //sample aspect ratio is new width/height divided by old width/height
1517
        st->sample_aspect_ratio = av_d2q(
1518
            ((double) disp_transform[0] * height) /
1519
            ((double) disp_transform[1] * width), INT_MAX);
1520
    }
1521
    return 0;
1522
}
1523

    
1524
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1525
{
1526
    MOVFragment *frag = &c->fragment;
1527
    MOVTrackExt *trex = NULL;
1528
    int flags, track_id, i;
1529

    
1530
    get_byte(pb); /* version */
1531
    flags = get_be24(pb);
1532

    
1533
    track_id = get_be32(pb);
1534
    if (!track_id)
1535
        return -1;
1536
    frag->track_id = track_id;
1537
    for (i = 0; i < c->trex_count; i++)
1538
        if (c->trex_data[i].track_id == frag->track_id) {
1539
            trex = &c->trex_data[i];
1540
            break;
1541
        }
1542
    if (!trex) {
1543
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1544
        return -1;
1545
    }
1546

    
1547
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1548
    else              frag->base_data_offset = frag->moof_offset;
1549
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1550
    else              frag->stsd_id          = trex->stsd_id;
1551

    
1552
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1553
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1554
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1555
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1556
    return 0;
1557
}
1558

    
1559
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1560
{
1561
    MOVTrackExt *trex;
1562

    
1563
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1564
        return -1;
1565
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1566
    if (!trex)
1567
        return AVERROR(ENOMEM);
1568
    c->trex_data = trex;
1569
    trex = &c->trex_data[c->trex_count++];
1570
    get_byte(pb); /* version */
1571
    get_be24(pb); /* flags */
1572
    trex->track_id = get_be32(pb);
1573
    trex->stsd_id  = get_be32(pb);
1574
    trex->duration = get_be32(pb);
1575
    trex->size     = get_be32(pb);
1576
    trex->flags    = get_be32(pb);
1577
    return 0;
1578
}
1579

    
1580
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1581
{
1582
    MOVFragment *frag = &c->fragment;
1583
    AVStream *st = NULL;
1584
    MOVStreamContext *sc;
1585
    uint64_t offset;
1586
    int64_t dts;
1587
    int data_offset = 0;
1588
    unsigned entries, first_sample_flags = frag->flags;
1589
    int flags, distance, i;
1590

    
1591
    for (i = 0; i < c->fc->nb_streams; i++) {
1592
        if (c->fc->streams[i]->id == frag->track_id) {
1593
            st = c->fc->streams[i];
1594
            break;
1595
        }
1596
    }
1597
    if (!st) {
1598
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1599
        return -1;
1600
    }
1601
    sc = st->priv_data;
1602
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1603
        return 0;
1604
    get_byte(pb); /* version */
1605
    flags = get_be24(pb);
1606
    entries = get_be32(pb);
1607
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1608
    if (flags & 0x001) data_offset        = get_be32(pb);
1609
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1610
    if (flags & 0x800) {
1611
        MOVStts *ctts_data;
1612
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1613
            return -1;
1614
        ctts_data = av_realloc(sc->ctts_data,
1615
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1616
        if (!ctts_data)
1617
            return AVERROR(ENOMEM);
1618
        sc->ctts_data = ctts_data;
1619
    }
1620
    dts = st->duration;
1621
    offset = frag->base_data_offset + data_offset;
1622
    distance = 0;
1623
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1624
    for (i = 0; i < entries; i++) {
1625
        unsigned sample_size = frag->size;
1626
        int sample_flags = i ? frag->flags : first_sample_flags;
1627
        unsigned sample_duration = frag->duration;
1628
        int keyframe;
1629

    
1630
        if (flags & 0x100) sample_duration = get_be32(pb);
1631
        if (flags & 0x200) sample_size     = get_be32(pb);
1632
        if (flags & 0x400) sample_flags    = get_be32(pb);
1633
        if (flags & 0x800) {
1634
            sc->ctts_data[sc->ctts_count].count = 1;
1635
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1636
            sc->ctts_count++;
1637
        }
1638
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1639
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1640
            distance = 0;
1641
        av_add_index_entry(st, offset, dts, sample_size, distance,
1642
                           keyframe ? AVINDEX_KEYFRAME : 0);
1643
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1644
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1645
                offset, dts, sample_size, distance, keyframe);
1646
        distance++;
1647
        assert(sample_duration % sc->time_rate == 0);
1648
        dts += sample_duration / sc->time_rate;
1649
        offset += sample_size;
1650
    }
1651
    frag->moof_offset = offset;
1652
    st->duration = dts;
1653
    return 0;
1654
}
1655

    
1656
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1657
/* like the files created with Adobe Premiere 5.0, for samples see */
1658
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1659
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1660
{
1661
    int err;
1662

    
1663
    if (atom.size < 8)
1664
        return 0; /* continue */
1665
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1666
        url_fskip(pb, atom.size - 4);
1667
        return 0;
1668
    }
1669
    atom.type = get_le32(pb);
1670
    atom.offset += 8;
1671
    atom.size -= 8;
1672
    if (atom.type != MKTAG('m','d','a','t')) {
1673
        url_fskip(pb, atom.size);
1674
        return 0;
1675
    }
1676
    err = mov_read_mdat(c, pb, atom);
1677
    return err;
1678
}
1679

    
1680
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1681
{
1682
#if CONFIG_ZLIB
1683
    ByteIOContext ctx;
1684
    uint8_t *cmov_data;
1685
    uint8_t *moov_data; /* uncompressed data */
1686
    long cmov_len, moov_len;
1687
    int ret = -1;
1688

    
1689
    get_be32(pb); /* dcom atom */
1690
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1691
        return -1;
1692
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1693
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1694
        return -1;
1695
    }
1696
    get_be32(pb); /* cmvd atom */
1697
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1698
        return -1;
1699
    moov_len = get_be32(pb); /* uncompressed size */
1700
    cmov_len = atom.size - 6 * 4;
1701

    
1702
    cmov_data = av_malloc(cmov_len);
1703
    if (!cmov_data)
1704
        return AVERROR(ENOMEM);
1705
    moov_data = av_malloc(moov_len);
1706
    if (!moov_data) {
1707
        av_free(cmov_data);
1708
        return AVERROR(ENOMEM);
1709
    }
1710
    get_buffer(pb, cmov_data, cmov_len);
1711
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1712
        goto free_and_return;
1713
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1714
        goto free_and_return;
1715
    atom.type = MKTAG('m','o','o','v');
1716
    atom.offset = 0;
1717
    atom.size = moov_len;
1718
#ifdef DEBUG
1719
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1720
#endif
1721
    ret = mov_read_default(c, &ctx, atom);
1722
free_and_return:
1723
    av_free(moov_data);
1724
    av_free(cmov_data);
1725
    return ret;
1726
#else
1727
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1728
    return -1;
1729
#endif
1730
}
1731

    
1732
/* edit list atom */
1733
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1734
{
1735
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1736
    int i, edit_count;
1737

    
1738
    get_byte(pb); /* version */
1739
    get_be24(pb); /* flags */
1740
    edit_count = get_be32(pb); /* entries */
1741

    
1742
    for(i=0; i<edit_count; i++){
1743
        int time;
1744
        get_be32(pb); /* Track duration */
1745
        time = get_be32(pb); /* Media time */
1746
        get_be32(pb); /* Media rate */
1747
        if (i == 0 && time != -1) {
1748
            sc->time_offset = time;
1749
            sc->time_rate = av_gcd(sc->time_rate, time);
1750
        }
1751
    }
1752

    
1753
    if(edit_count > 1)
1754
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1755
               "a/v desync might occur, patch welcome\n");
1756

    
1757
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1758
    return 0;
1759
}
1760

    
1761
static const MOVParseTableEntry mov_default_parse_table[] = {
1762
{ MKTAG('a','v','s','s'), mov_read_extradata },
1763
{ MKTAG('c','o','6','4'), mov_read_stco },
1764
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1765
{ MKTAG('d','i','n','f'), mov_read_default },
1766
{ MKTAG('d','r','e','f'), mov_read_dref },
1767
{ MKTAG('e','d','t','s'), mov_read_default },
1768
{ MKTAG('e','l','s','t'), mov_read_elst },
1769
{ MKTAG('e','n','d','a'), mov_read_enda },
1770
{ MKTAG('f','i','e','l'), mov_read_extradata },
1771
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1772
{ MKTAG('g','l','b','l'), mov_read_glbl },
1773
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1774
{ MKTAG('i','l','s','t'), mov_read_ilst },
1775
{ MKTAG('j','p','2','h'), mov_read_extradata },
1776
{ MKTAG('m','d','a','t'), mov_read_mdat },
1777
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1778
{ MKTAG('m','d','i','a'), mov_read_default },
1779
{ MKTAG('m','e','t','a'), mov_read_meta },
1780
{ MKTAG('m','i','n','f'), mov_read_default },
1781
{ MKTAG('m','o','o','f'), mov_read_moof },
1782
{ MKTAG('m','o','o','v'), mov_read_moov },
1783
{ MKTAG('m','v','e','x'), mov_read_default },
1784
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1785
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1786
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1787
{ MKTAG('a','v','c','C'), mov_read_glbl },
1788
{ MKTAG('p','a','s','p'), mov_read_pasp },
1789
{ MKTAG('s','t','b','l'), mov_read_default },
1790
{ MKTAG('s','t','c','o'), mov_read_stco },
1791
{ MKTAG('s','t','s','c'), mov_read_stsc },
1792
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1793
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1794
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1795
{ MKTAG('s','t','t','s'), mov_read_stts },
1796
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1797
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1798
{ MKTAG('t','r','a','k'), mov_read_trak },
1799
{ MKTAG('t','r','a','f'), mov_read_default },
1800
{ MKTAG('t','r','e','x'), mov_read_trex },
1801
{ MKTAG('t','r','u','n'), mov_read_trun },
1802
{ MKTAG('u','d','t','a'), mov_read_default },
1803
{ MKTAG('w','a','v','e'), mov_read_wave },
1804
{ MKTAG('e','s','d','s'), mov_read_esds },
1805
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1806
{ MKTAG('c','m','o','v'), mov_read_cmov },
1807
{ 0, NULL }
1808
};
1809

    
1810
static int mov_probe(AVProbeData *p)
1811
{
1812
    unsigned int offset;
1813
    uint32_t tag;
1814
    int score = 0;
1815

    
1816
    /* check file header */
1817
    offset = 0;
1818
    for(;;) {
1819
        /* ignore invalid offset */
1820
        if ((offset + 8) > (unsigned int)p->buf_size)
1821
            return score;
1822
        tag = AV_RL32(p->buf + offset + 4);
1823
        switch(tag) {
1824
        /* check for obvious tags */
1825
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1826
        case MKTAG('m','o','o','v'):
1827
        case MKTAG('m','d','a','t'):
1828
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1829
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1830
        case MKTAG('f','t','y','p'):
1831
            return AVPROBE_SCORE_MAX;
1832
        /* those are more common words, so rate then a bit less */
1833
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1834
        case MKTAG('w','i','d','e'):
1835
        case MKTAG('f','r','e','e'):
1836
        case MKTAG('j','u','n','k'):
1837
        case MKTAG('p','i','c','t'):
1838
            return AVPROBE_SCORE_MAX - 5;
1839
        case MKTAG(0x82,0x82,0x7f,0x7d):
1840
        case MKTAG('s','k','i','p'):
1841
        case MKTAG('u','u','i','d'):
1842
        case MKTAG('p','r','f','l'):
1843
            offset = AV_RB32(p->buf+offset) + offset;
1844
            /* if we only find those cause probedata is too small at least rate them */
1845
            score = AVPROBE_SCORE_MAX - 50;
1846
            break;
1847
        default:
1848
            /* unrecognized tag */
1849
            return score;
1850
        }
1851
    }
1852
    return score;
1853
}
1854

    
1855
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1856
{
1857
    MOVContext *mov = s->priv_data;
1858
    ByteIOContext *pb = s->pb;
1859
    int err;
1860
    MOVAtom atom = { 0, 0, 0 };
1861

    
1862
    mov->fc = s;
1863
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1864
    if(!url_is_streamed(pb))
1865
        atom.size = url_fsize(pb);
1866
    else
1867
        atom.size = INT64_MAX;
1868

    
1869
    /* check MOV header */
1870
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1871
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1872
        return err;
1873
    }
1874
    if (!mov->found_moov) {
1875
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1876
        return -1;
1877
    }
1878
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1879

    
1880
    return 0;
1881
}
1882

    
1883
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1884
{
1885
    MOVContext *mov = s->priv_data;
1886
    MOVStreamContext *sc = 0;
1887
    AVIndexEntry *sample = 0;
1888
    int64_t best_dts = INT64_MAX;
1889
    int i, ret;
1890
 retry:
1891
    for (i = 0; i < s->nb_streams; i++) {
1892
        AVStream *st = s->streams[i];
1893
        MOVStreamContext *msc = st->priv_data;
1894
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
1895
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1896
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1897
                                     AV_TIME_BASE, msc->time_scale);
1898
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1899
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1900
                (!url_is_streamed(s->pb) &&
1901
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1902
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1903
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1904
                sample = current_sample;
1905
                best_dts = dts;
1906
                sc = msc;
1907
            }
1908
        }
1909
    }
1910
    if (!sample) {
1911
        mov->found_mdat = 0;
1912
        if (!url_is_streamed(s->pb) ||
1913
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1914
            url_feof(s->pb))
1915
            return -1;
1916
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1917
        goto retry;
1918
    }
1919
    /* must be done just before reading, to avoid infinite loop on sample */
1920
    sc->current_sample++;
1921
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1922
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1923
               sc->ffindex, sample->pos);
1924
        return -1;
1925
    }
1926
    ret = av_get_packet(sc->pb, pkt, sample->size);
1927
    if (ret < 0)
1928
        return ret;
1929
#if CONFIG_DV_DEMUXER
1930
    if (mov->dv_demux && sc->dv_audio_container) {
1931
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1932
        av_free(pkt->data);
1933
        pkt->size = 0;
1934
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1935
            return -1;
1936
    }
1937
#endif
1938
    pkt->stream_index = sc->ffindex;
1939
    pkt->dts = sample->timestamp;
1940
    if (sc->ctts_data) {
1941
        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
1942
        pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
1943
        /* update ctts context */
1944
        sc->ctts_sample++;
1945
        if (sc->ctts_index < sc->ctts_count &&
1946
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
1947
            sc->ctts_index++;
1948
            sc->ctts_sample = 0;
1949
        }
1950
        if (sc->wrong_dts)
1951
            pkt->dts = AV_NOPTS_VALUE;
1952
    } else {
1953
        AVStream *st = s->streams[sc->ffindex];
1954
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
1955
            st->index_entries[sc->current_sample].timestamp : st->duration;
1956
        pkt->duration = next_dts - pkt->dts;
1957
        pkt->pts = pkt->dts;
1958
    }
1959
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1960
    pkt->pos = sample->pos;
1961
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1962
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1963
    return 0;
1964
}
1965

    
1966
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1967
{
1968
    MOVStreamContext *sc = st->priv_data;
1969
    int sample, time_sample;
1970
    int i;
1971

    
1972
    sample = av_index_search_timestamp(st, timestamp, flags);
1973
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1974
    if (sample < 0) /* not sure what to do */
1975
        return -1;
1976
    sc->current_sample = sample;
1977
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1978
    /* adjust ctts index */
1979
    if (sc->ctts_data) {
1980
        time_sample = 0;
1981
        for (i = 0; i < sc->ctts_count; i++) {
1982
            int next = time_sample + sc->ctts_data[i].count;
1983
            if (next > sc->current_sample) {
1984
                sc->ctts_index = i;
1985
                sc->ctts_sample = sc->current_sample - time_sample;
1986
                break;
1987
            }
1988
            time_sample = next;
1989
        }
1990
    }
1991
    return sample;
1992
}
1993

    
1994
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1995
{
1996
    AVStream *st;
1997
    int64_t seek_timestamp, timestamp;
1998
    int sample;
1999
    int i;
2000

    
2001
    if (stream_index >= s->nb_streams)
2002
        return -1;
2003
    if (sample_time < 0)
2004
        sample_time = 0;
2005

    
2006
    st = s->streams[stream_index];
2007
    sample = mov_seek_stream(st, sample_time, flags);
2008
    if (sample < 0)
2009
        return -1;
2010

    
2011
    /* adjust seek timestamp to found sample timestamp */
2012
    seek_timestamp = st->index_entries[sample].timestamp;
2013

    
2014
    for (i = 0; i < s->nb_streams; i++) {
2015
        st = s->streams[i];
2016
        if (stream_index == i || st->discard == AVDISCARD_ALL)
2017
            continue;
2018

    
2019
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2020
        mov_seek_stream(st, timestamp, flags);
2021
    }
2022
    return 0;
2023
}
2024

    
2025
static int mov_read_close(AVFormatContext *s)
2026
{
2027
    MOVContext *mov = s->priv_data;
2028
    int i, j;
2029

    
2030
    for (i = 0; i < s->nb_streams; i++) {
2031
        AVStream *st = s->streams[i];
2032
        MOVStreamContext *sc = st->priv_data;
2033

    
2034
        av_freep(&sc->ctts_data);
2035
        for (j = 0; j < sc->drefs_count; j++)
2036
            av_freep(&sc->drefs[j].path);
2037
        av_freep(&sc->drefs);
2038
        if (sc->pb && sc->pb != s->pb)
2039
            url_fclose(sc->pb);
2040

    
2041
        av_freep(&st->codec->palctrl);
2042
    }
2043

    
2044
    if (mov->dv_demux) {
2045
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2046
            av_freep(&mov->dv_fctx->streams[i]->codec);
2047
            av_freep(&mov->dv_fctx->streams[i]);
2048
        }
2049
        av_freep(&mov->dv_fctx);
2050
        av_freep(&mov->dv_demux);
2051
    }
2052

    
2053
    av_freep(&mov->trex_data);
2054

    
2055
    return 0;
2056
}
2057

    
2058
AVInputFormat mov_demuxer = {
2059
    "mov,mp4,m4a,3gp,3g2,mj2",
2060
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2061
    sizeof(MOVContext),
2062
    mov_probe,
2063
    mov_read_header,
2064
    mov_read_packet,
2065
    mov_read_close,
2066
    mov_read_seek,
2067
};