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ffmpeg / libavformat / mov.c @ 2229a5c6

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1
/*
2
 * MOV demuxer
3
 * Copyright (c) 2001 Fabrice Bellard
4
 * 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

    
25
//#define DEBUG
26

    
27
#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"
33
#include "libavcodec/mpegaudiodata.h"
34

    
35
#if CONFIG_ZLIB
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#include <zlib.h>
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#endif
38

    
39
/*
40
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
42
 *
43
 * Features and limitations:
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 * - 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 :-)
47
 *
48
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
50
 *
51
 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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 * Apple:
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 *  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 :))
57
 */
58

    
59
#include "qtpalette.h"
60

    
61

    
62
#undef NDEBUG
63
#include <assert.h>
64

    
65
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
66

    
67
/* those functions parse an atom */
68
/* return code:
69
  0: continue to parse next atom
70
 <0: error occurred, exit
71
*/
72
/* links atom IDs to parse functions */
73
typedef struct MOVParseTableEntry {
74
    uint32_t type;
75
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
76
} MOVParseTableEntry;
77

    
78
static const MOVParseTableEntry mov_default_parse_table[];
79

    
80
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
81
{
82
    int64_t total_size = 0;
83
    MOVAtom a;
84
    int i;
85
    int err = 0;
86

    
87
    a.offset = atom.offset;
88

    
89
    if (atom.size < 0)
90
        atom.size = INT64_MAX;
91
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
92
        a.size = atom.size;
93
        a.type=0;
94
        if(atom.size >= 8) {
95
            a.size = get_be32(pb);
96
            a.type = get_le32(pb);
97
        }
98
        total_size += 8;
99
        a.offset += 8;
100
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
101
                a.type, (char*)&a.type, a.size, atom.size, total_size);
102
        if (a.size == 1) { /* 64 bit extended size */
103
            a.size = get_be64(pb) - 8;
104
            a.offset += 8;
105
            total_size += 8;
106
        }
107
        if (a.size == 0) {
108
            a.size = atom.size - total_size;
109
            if (a.size <= 8)
110
                break;
111
        }
112
        a.size -= 8;
113
        if(a.size < 0)
114
            break;
115
        a.size = FFMIN(a.size, atom.size - total_size);
116

    
117
        for (i = 0; mov_default_parse_table[i].type != 0
118
             && mov_default_parse_table[i].type != a.type; i++)
119
            /* empty */;
120

    
121
        if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */
122
            url_fskip(pb, a.size);
123
        } else {
124
            int64_t start_pos = url_ftell(pb);
125
            int64_t left;
126
            err = mov_default_parse_table[i].parse(c, pb, a);
127
            if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
128
                break;
129
            left = a.size - url_ftell(pb) + start_pos;
130
            if (left > 0) /* skip garbage at atom end */
131
                url_fskip(pb, left);
132
        }
133

    
134
        a.offset += a.size;
135
        total_size += a.size;
136
    }
137

    
138
    if (!err && total_size < atom.size && atom.size < 0x7ffff)
139
        url_fskip(pb, atom.size - total_size);
140

    
141
    return err;
142
}
143

    
144
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
145
{
146
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
147
    MOVStreamContext *sc = st->priv_data;
148
    int entries, i, j;
149

    
150
    get_be32(pb); // version + flags
151
    entries = get_be32(pb);
152
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
153
        return -1;
154
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
155
    if (!sc->drefs)
156
        return AVERROR(ENOMEM);
157
    sc->drefs_count = entries;
158

    
159
    for (i = 0; i < sc->drefs_count; i++) {
160
        MOVDref *dref = &sc->drefs[i];
161
        uint32_t size = get_be32(pb);
162
        int64_t next = url_ftell(pb) + size - 4;
163

    
164
        dref->type = get_le32(pb);
165
        get_be32(pb); // version + flags
166
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
167

    
168
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
169
            /* macintosh alias record */
170
            uint16_t volume_len, len;
171
            char volume[28];
172
            int16_t type;
173

    
174
            url_fskip(pb, 10);
175

    
176
            volume_len = get_byte(pb);
177
            volume_len = FFMIN(volume_len, 27);
178
            get_buffer(pb, volume, 27);
179
            volume[volume_len] = 0;
180
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
181

    
182
            url_fskip(pb, 112);
183

    
184
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
185
                type = get_be16(pb);
186
                len = get_be16(pb);
187
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
188
                if (len&1)
189
                    len += 1;
190
                if (type == 2) { // absolute path
191
                    av_free(dref->path);
192
                    dref->path = av_mallocz(len+1);
193
                    if (!dref->path)
194
                        return AVERROR(ENOMEM);
195
                    get_buffer(pb, dref->path, len);
196
                    if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
197
                        len -= volume_len;
198
                        memmove(dref->path, dref->path+volume_len, len);
199
                        dref->path[len] = 0;
200
                    }
201
                    for (j = 0; j < len; j++)
202
                        if (dref->path[j] == ':')
203
                            dref->path[j] = '/';
204
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
205
                } else
206
                    url_fskip(pb, len);
207
            }
208
        }
209
        url_fseek(pb, next, SEEK_SET);
210
    }
211
    return 0;
212
}
213

    
214
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
215
{
216
    AVStream *st;
217
    uint32_t type;
218
    uint32_t ctype;
219

    
220
    if (c->fc->nb_streams < 1) // meta before first trak
221
        return 0;
222

    
223
    st = c->fc->streams[c->fc->nb_streams-1];
224

    
225
    get_byte(pb); /* version */
226
    get_be24(pb); /* flags */
227

    
228
    /* component type */
229
    ctype = get_le32(pb);
230
    type = get_le32(pb); /* component subtype */
231

    
232
    dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1],
233
            ((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype);
234
    dprintf(c->fc, "stype= %c%c%c%c\n",
235
            *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
236

    
237
    if     (type == MKTAG('v','i','d','e'))
238
        st->codec->codec_type = CODEC_TYPE_VIDEO;
239
    else if(type == MKTAG('s','o','u','n'))
240
        st->codec->codec_type = CODEC_TYPE_AUDIO;
241
    else if(type == MKTAG('m','1','a',' '))
242
        st->codec->codec_id = CODEC_ID_MP2;
243
    else if(type == MKTAG('s','u','b','p')) {
244
        st->codec->codec_type = CODEC_TYPE_SUBTITLE;
245
    }
246
    get_be32(pb); /* component  manufacture */
247
    get_be32(pb); /* component flags */
248
    get_be32(pb); /* component flags mask */
249

    
250
    if(atom.size <= 24)
251
        return 0; /* nothing left to read */
252

    
253
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
254
    return 0;
255
}
256

    
257
static int mp4_read_descr_len(ByteIOContext *pb)
258
{
259
    int len = 0;
260
    int count = 4;
261
    while (count--) {
262
        int c = get_byte(pb);
263
        len = (len << 7) | (c & 0x7f);
264
        if (!(c & 0x80))
265
            break;
266
    }
267
    return len;
268
}
269

    
270
static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag)
271
{
272
    int len;
273
    *tag = get_byte(pb);
274
    len = mp4_read_descr_len(pb);
275
    dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
276
    return len;
277
}
278

    
279
#define MP4ESDescrTag                   0x03
280
#define MP4DecConfigDescrTag            0x04
281
#define MP4DecSpecificDescrTag          0x05
282

    
283
static const AVCodecTag mp4_audio_types[] = {
284
    { CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
285
    { CODEC_ID_MP3ON4, 32 }, /* layer 1 */
286
    { CODEC_ID_MP3ON4, 33 }, /* layer 2 */
287
    { CODEC_ID_MP3ON4, 34 }, /* layer 3 */
288
    { CODEC_ID_NONE,    0 },
289
};
290

    
291
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
292
{
293
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
294
    int tag, len;
295

    
296
    get_be32(pb); /* version + flags */
297
    len = mp4_read_descr(c, pb, &tag);
298
    if (tag == MP4ESDescrTag) {
299
        get_be16(pb); /* ID */
300
        get_byte(pb); /* priority */
301
    } else
302
        get_be16(pb); /* ID */
303

    
304
    len = mp4_read_descr(c, pb, &tag);
305
    if (tag == MP4DecConfigDescrTag) {
306
        int object_type_id = get_byte(pb);
307
        get_byte(pb); /* stream type */
308
        get_be24(pb); /* buffer size db */
309
        get_be32(pb); /* max bitrate */
310
        get_be32(pb); /* avg bitrate */
311

    
312
        st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id);
313
        dprintf(c->fc, "esds object type id %d\n", object_type_id);
314
        len = mp4_read_descr(c, pb, &tag);
315
        if (tag == MP4DecSpecificDescrTag) {
316
            dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
317
            if((uint64_t)len > (1<<30))
318
                return -1;
319
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
320
            if (!st->codec->extradata)
321
                return AVERROR(ENOMEM);
322
            get_buffer(pb, st->codec->extradata, len);
323
            st->codec->extradata_size = len;
324
            if (st->codec->codec_id == CODEC_ID_AAC) {
325
                MPEG4AudioConfig cfg;
326
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
327
                                         st->codec->extradata_size);
328
                if (cfg.chan_config > 7)
329
                    return -1;
330
                st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
331
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
332
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
333
                else
334
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
335
                dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
336
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
337
                        cfg.object_type, cfg.ext_object_type,
338
                        cfg.sample_rate, cfg.ext_sample_rate);
339
                if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
340
                                                         cfg.object_type)))
341
                    st->codec->codec_id = CODEC_ID_AAC;
342
            }
343
        }
344
    }
345
    return 0;
346
}
347

    
348
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
349
{
350
    const int num = get_be32(pb);
351
    const int den = get_be32(pb);
352
    AVStream * const st = c->fc->streams[c->fc->nb_streams-1];
353
    if (den != 0) {
354
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
355
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
356
            av_log(c->fc, AV_LOG_WARNING,
357
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
358
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
359
        st->sample_aspect_ratio.num = num;
360
        st->sample_aspect_ratio.den = den;
361
    }
362
    return 0;
363
}
364

    
365
/* this atom contains actual media data */
366
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
367
{
368
    if(atom.size == 0) /* wrong one (MP4) */
369
        return 0;
370
    c->found_mdat=1;
371
    return 0; /* now go for moov */
372
}
373

    
374
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
375
{
376
    uint32_t type = get_le32(pb);
377

    
378
    if (type != MKTAG('q','t',' ',' '))
379
        c->isom = 1;
380
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
381
    get_be32(pb); /* minor version */
382
    url_fskip(pb, atom.size - 8);
383
    return 0;
384
}
385

    
386
/* this atom should contain all header atoms */
387
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
388
{
389
    if (mov_read_default(c, pb, atom) < 0)
390
        return -1;
391
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
392
    /* so we don't parse the whole file if over a network */
393
    c->found_moov=1;
394
    return 0; /* now go for mdat */
395
}
396

    
397
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
398
{
399
    c->fragment.moof_offset = url_ftell(pb) - 8;
400
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
401
    return mov_read_default(c, pb, atom);
402
}
403

    
404
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
405
{
406
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
407
    MOVStreamContext *sc = st->priv_data;
408
    int version = get_byte(pb);
409
    char language[4] = {0};
410
    unsigned lang;
411

    
412
    if (version > 1)
413
        return -1; /* unsupported */
414

    
415
    get_be24(pb); /* flags */
416
    if (version == 1) {
417
        get_be64(pb);
418
        get_be64(pb);
419
    } else {
420
        get_be32(pb); /* creation time */
421
        get_be32(pb); /* modification time */
422
    }
423

    
424
    sc->time_scale = get_be32(pb);
425
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
426

    
427
    lang = get_be16(pb); /* language */
428
    if (ff_mov_lang_to_iso639(lang, language))
429
        av_metadata_set(&st->metadata, "language", language);
430
    get_be16(pb); /* quality */
431

    
432
    return 0;
433
}
434

    
435
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
436
{
437
    int version = get_byte(pb); /* version */
438
    get_be24(pb); /* flags */
439

    
440
    if (version == 1) {
441
        get_be64(pb);
442
        get_be64(pb);
443
    } else {
444
        get_be32(pb); /* creation time */
445
        get_be32(pb); /* modification time */
446
    }
447
    c->time_scale = get_be32(pb); /* time scale */
448

    
449
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
450

    
451
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
452
    get_be32(pb); /* preferred scale */
453

    
454
    get_be16(pb); /* preferred volume */
455

    
456
    url_fskip(pb, 10); /* reserved */
457

    
458
    url_fskip(pb, 36); /* display matrix */
459

    
460
    get_be32(pb); /* preview time */
461
    get_be32(pb); /* preview duration */
462
    get_be32(pb); /* poster time */
463
    get_be32(pb); /* selection time */
464
    get_be32(pb); /* selection duration */
465
    get_be32(pb); /* current time */
466
    get_be32(pb); /* next track ID */
467

    
468
    return 0;
469
}
470

    
471
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
472
{
473
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
474

    
475
    if((uint64_t)atom.size > (1<<30))
476
        return -1;
477

    
478
    // currently SVQ3 decoder expect full STSD header - so let's fake it
479
    // this should be fixed and just SMI header should be passed
480
    av_free(st->codec->extradata);
481
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
482
    if (!st->codec->extradata)
483
        return AVERROR(ENOMEM);
484
    st->codec->extradata_size = 0x5a + atom.size;
485
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
486
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
487
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
488
    return 0;
489
}
490

    
491
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
492
{
493
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
494
    int little_endian = get_be16(pb);
495

    
496
    dprintf(c->fc, "enda %d\n", little_endian);
497
    if (little_endian == 1) {
498
        switch (st->codec->codec_id) {
499
        case CODEC_ID_PCM_S24BE:
500
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
501
            break;
502
        case CODEC_ID_PCM_S32BE:
503
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
504
            break;
505
        case CODEC_ID_PCM_F32BE:
506
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
507
            break;
508
        case CODEC_ID_PCM_F64BE:
509
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
510
            break;
511
        default:
512
            break;
513
        }
514
    }
515
    return 0;
516
}
517

    
518
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
519
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
520
{
521
    AVStream *st;
522
    uint64_t size;
523
    uint8_t *buf;
524

    
525
    if (c->fc->nb_streams < 1) // will happen with jp2 files
526
        return 0;
527
    st= c->fc->streams[c->fc->nb_streams-1];
528
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
529
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
530
        return -1;
531
    buf= av_realloc(st->codec->extradata, size);
532
    if(!buf)
533
        return -1;
534
    st->codec->extradata= buf;
535
    buf+= st->codec->extradata_size;
536
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
537
    AV_WB32(       buf    , atom.size + 8);
538
    AV_WL32(       buf + 4, atom.type);
539
    get_buffer(pb, buf + 8, atom.size);
540
    return 0;
541
}
542

    
543
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
544
{
545
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
546

    
547
    if((uint64_t)atom.size > (1<<30))
548
        return -1;
549

    
550
    if (st->codec->codec_id == CODEC_ID_QDM2) {
551
        // pass all frma atom to codec, needed at least for QDM2
552
        av_free(st->codec->extradata);
553
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
554
        if (!st->codec->extradata)
555
            return AVERROR(ENOMEM);
556
        st->codec->extradata_size = atom.size;
557
        get_buffer(pb, st->codec->extradata, atom.size);
558
    } else if (atom.size > 8) { /* to read frma, esds atoms */
559
        if (mov_read_default(c, pb, atom) < 0)
560
            return -1;
561
    } else
562
        url_fskip(pb, atom.size);
563
    return 0;
564
}
565

    
566
/**
567
 * This function reads atom content and puts data in extradata without tag
568
 * nor size unlike mov_read_extradata.
569
 */
570
static int mov_read_glbl(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
    av_free(st->codec->extradata);
578
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
579
    if (!st->codec->extradata)
580
        return AVERROR(ENOMEM);
581
    st->codec->extradata_size = atom.size;
582
    get_buffer(pb, st->codec->extradata, atom.size);
583
    return 0;
584
}
585

    
586
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
587
{
588
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
589
    MOVStreamContext *sc = st->priv_data;
590
    unsigned int i, entries;
591

    
592
    get_byte(pb); /* version */
593
    get_be24(pb); /* flags */
594

    
595
    entries = get_be32(pb);
596

    
597
    if(entries >= UINT_MAX/sizeof(int64_t))
598
        return -1;
599

    
600
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
601
    if (!sc->chunk_offsets)
602
        return AVERROR(ENOMEM);
603
    sc->chunk_count = entries;
604

    
605
    if      (atom.type == MKTAG('s','t','c','o'))
606
        for(i=0; i<entries; i++)
607
            sc->chunk_offsets[i] = get_be32(pb);
608
    else if (atom.type == MKTAG('c','o','6','4'))
609
        for(i=0; i<entries; i++)
610
            sc->chunk_offsets[i] = get_be64(pb);
611
    else
612
        return -1;
613

    
614
    return 0;
615
}
616

    
617
/**
618
 * Compute codec id for 'lpcm' tag.
619
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
620
 */
621
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags)
622
{
623
    if (flags & 1) { // floating point
624
        if (flags & 2) { // big endian
625
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
626
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
627
        } else {
628
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
629
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
630
        }
631
    } else {
632
        if (flags & 2) {
633
            if      (bps == 8)
634
                // signed integer
635
                if (flags & 4)  return CODEC_ID_PCM_S8;
636
                else            return CODEC_ID_PCM_U8;
637
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
638
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
639
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
640
        } else {
641
            if      (bps == 8)
642
                if (flags & 4)  return CODEC_ID_PCM_S8;
643
                else            return CODEC_ID_PCM_U8;
644
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
645
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
646
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
647
        }
648
    }
649
    return CODEC_ID_NONE;
650
}
651

    
652
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
653
{
654
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
655
    MOVStreamContext *sc = st->priv_data;
656
    int j, entries, pseudo_stream_id;
657

    
658
    get_byte(pb); /* version */
659
    get_be24(pb); /* flags */
660

    
661
    entries = get_be32(pb);
662

    
663
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
664
        //Parsing Sample description table
665
        enum CodecID id;
666
        int dref_id;
667
        MOVAtom a = { 0, 0, 0 };
668
        int64_t start_pos = url_ftell(pb);
669
        int size = get_be32(pb); /* size */
670
        uint32_t format = get_le32(pb); /* data format */
671

    
672
        get_be32(pb); /* reserved */
673
        get_be16(pb); /* reserved */
674
        dref_id = get_be16(pb);
675

    
676
        if (st->codec->codec_tag &&
677
            st->codec->codec_tag != format &&
678
            (c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
679
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
680
           ){
681
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
682
             * export it as a separate AVStream but this needs a few changes
683
             * in the MOV demuxer, patch welcome. */
684
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
685
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
686
            continue;
687
        }
688
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
689
        sc->dref_id= dref_id;
690

    
691
        st->codec->codec_tag = format;
692
        id = codec_get_id(codec_movaudio_tags, format);
693
        if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8))
694
            id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
695

    
696
        if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) {
697
            st->codec->codec_type = CODEC_TYPE_AUDIO;
698
        } else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */
699
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
700
            id = codec_get_id(codec_movvideo_tags, format);
701
            if (id <= 0)
702
                id = codec_get_id(codec_bmp_tags, format);
703
            if (id > 0)
704
                st->codec->codec_type = CODEC_TYPE_VIDEO;
705
            else if(st->codec->codec_type == CODEC_TYPE_DATA){
706
                id = codec_get_id(ff_codec_movsubtitle_tags, format);
707
                if(id > 0)
708
                    st->codec->codec_type = CODEC_TYPE_SUBTITLE;
709
            }
710
        }
711

    
712
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
713
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
714
                (format >> 24) & 0xff, st->codec->codec_type);
715

    
716
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
717
            uint8_t codec_name[32];
718
            unsigned int color_depth;
719
            int color_greyscale;
720

    
721
            st->codec->codec_id = id;
722
            get_be16(pb); /* version */
723
            get_be16(pb); /* revision level */
724
            get_be32(pb); /* vendor */
725
            get_be32(pb); /* temporal quality */
726
            get_be32(pb); /* spatial quality */
727

    
728
            st->codec->width = get_be16(pb); /* width */
729
            st->codec->height = get_be16(pb); /* height */
730

    
731
            get_be32(pb); /* horiz resolution */
732
            get_be32(pb); /* vert resolution */
733
            get_be32(pb); /* data size, always 0 */
734
            get_be16(pb); /* frames per samples */
735

    
736
            get_buffer(pb, codec_name, 32); /* codec name, pascal string */
737
            if (codec_name[0] <= 31) {
738
                memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
739
                st->codec->codec_name[codec_name[0]] = 0;
740
            }
741

    
742
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
743
            st->codec->color_table_id = get_be16(pb); /* colortable id */
744
            dprintf(c->fc, "depth %d, ctab id %d\n",
745
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
746
            /* figure out the palette situation */
747
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
748
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
749

    
750
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
751
            if ((color_depth == 2) || (color_depth == 4) ||
752
                (color_depth == 8)) {
753
                /* for palette traversal */
754
                unsigned int color_start, color_count, color_end;
755
                unsigned char r, g, b;
756

    
757
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
758
                if (color_greyscale) {
759
                    int color_index, color_dec;
760
                    /* compute the greyscale palette */
761
                    st->codec->bits_per_coded_sample = color_depth;
762
                    color_count = 1 << color_depth;
763
                    color_index = 255;
764
                    color_dec = 256 / (color_count - 1);
765
                    for (j = 0; j < color_count; j++) {
766
                        r = g = b = color_index;
767
                        st->codec->palctrl->palette[j] =
768
                            (r << 16) | (g << 8) | (b);
769
                        color_index -= color_dec;
770
                        if (color_index < 0)
771
                            color_index = 0;
772
                    }
773
                } else if (st->codec->color_table_id) {
774
                    const uint8_t *color_table;
775
                    /* if flag bit 3 is set, use the default palette */
776
                    color_count = 1 << color_depth;
777
                    if (color_depth == 2)
778
                        color_table = ff_qt_default_palette_4;
779
                    else if (color_depth == 4)
780
                        color_table = ff_qt_default_palette_16;
781
                    else
782
                        color_table = ff_qt_default_palette_256;
783

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

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

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

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

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

    
834
            //Read QT version 1 fields. In version 0 these do not exist.
835
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
836
            if(!c->isom) {
837
                if(version==1) {
838
                    sc->samples_per_frame = get_be32(pb);
839
                    get_be32(pb); /* bytes per packet */
840
                    sc->bytes_per_frame = get_be32(pb);
841
                    get_be32(pb); /* bytes per sample */
842
                } else if(version==2) {
843
                    get_be32(pb); /* sizeof struct only */
844
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
845
                    st->codec->channels = get_be32(pb);
846
                    get_be32(pb); /* always 0x7F000000 */
847
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
848
                    flags = get_be32(pb); /* lcpm format specific flag */
849
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
850
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
851
                    if (format == MKTAG('l','p','c','m'))
852
                        st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
853
                }
854
            }
855

    
856
            switch (st->codec->codec_id) {
857
            case CODEC_ID_PCM_S8:
858
            case CODEC_ID_PCM_U8:
859
                if (st->codec->bits_per_coded_sample == 16)
860
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
861
                break;
862
            case CODEC_ID_PCM_S16LE:
863
            case CODEC_ID_PCM_S16BE:
864
                if (st->codec->bits_per_coded_sample == 8)
865
                    st->codec->codec_id = CODEC_ID_PCM_S8;
866
                else if (st->codec->bits_per_coded_sample == 24)
867
                    st->codec->codec_id =
868
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
869
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
870
                break;
871
            /* set values for old format before stsd version 1 appeared */
872
            case CODEC_ID_MACE3:
873
                sc->samples_per_frame = 6;
874
                sc->bytes_per_frame = 2*st->codec->channels;
875
                break;
876
            case CODEC_ID_MACE6:
877
                sc->samples_per_frame = 6;
878
                sc->bytes_per_frame = 1*st->codec->channels;
879
                break;
880
            case CODEC_ID_ADPCM_IMA_QT:
881
                sc->samples_per_frame = 64;
882
                sc->bytes_per_frame = 34*st->codec->channels;
883
                break;
884
            case CODEC_ID_GSM:
885
                sc->samples_per_frame = 160;
886
                sc->bytes_per_frame = 33;
887
                break;
888
            default:
889
                break;
890
            }
891

    
892
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
893
            if (bits_per_sample) {
894
                st->codec->bits_per_coded_sample = bits_per_sample;
895
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
896
            }
897
        } else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){
898
            // ttxt stsd contains display flags, justification, background
899
            // color, fonts, and default styles, so fake an atom to read it
900
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
901
            mov_read_glbl(c, pb, fake_atom);
902
            st->codec->codec_id= id;
903
            st->codec->width = sc->width;
904
            st->codec->height = sc->height;
905
        } else {
906
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
907
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
908
        }
909
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
910
        a.size = size - (url_ftell(pb) - start_pos);
911
        if (a.size > 8) {
912
            if (mov_read_default(c, pb, a) < 0)
913
                return -1;
914
        } else if (a.size > 0)
915
            url_fskip(pb, a.size);
916
    }
917

    
918
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
919
        st->codec->sample_rate= sc->time_scale;
920

    
921
    /* special codec parameters handling */
922
    switch (st->codec->codec_id) {
923
#if CONFIG_DV_DEMUXER
924
    case CODEC_ID_DVAUDIO:
925
        c->dv_fctx = avformat_alloc_context();
926
        c->dv_demux = dv_init_demux(c->dv_fctx);
927
        if (!c->dv_demux) {
928
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
929
            return -1;
930
        }
931
        sc->dv_audio_container = 1;
932
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
933
        break;
934
#endif
935
    /* no ifdef since parameters are always those */
936
    case CODEC_ID_QCELP:
937
        st->codec->frame_size= 160;
938
        st->codec->channels= 1; /* really needed */
939
        break;
940
    case CODEC_ID_AMR_NB:
941
    case CODEC_ID_AMR_WB:
942
        st->codec->frame_size= sc->samples_per_frame;
943
        st->codec->channels= 1; /* really needed */
944
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
945
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
946
            st->codec->sample_rate = 8000;
947
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
948
            st->codec->sample_rate = 16000;
949
        break;
950
    case CODEC_ID_MP2:
951
    case CODEC_ID_MP3:
952
        st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
953
        st->need_parsing = AVSTREAM_PARSE_FULL;
954
        break;
955
    case CODEC_ID_GSM:
956
    case CODEC_ID_ADPCM_MS:
957
    case CODEC_ID_ADPCM_IMA_WAV:
958
        st->codec->block_align = sc->bytes_per_frame;
959
        break;
960
    case CODEC_ID_ALAC:
961
        if (st->codec->extradata_size == 36) {
962
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
963
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
964
        }
965
        break;
966
    default:
967
        break;
968
    }
969

    
970
    return 0;
971
}
972

    
973
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
974
{
975
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
976
    MOVStreamContext *sc = st->priv_data;
977
    unsigned int i, entries;
978

    
979
    get_byte(pb); /* version */
980
    get_be24(pb); /* flags */
981

    
982
    entries = get_be32(pb);
983

    
984
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
985

    
986
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
987
        return -1;
988
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
989
    if (!sc->stsc_data)
990
        return AVERROR(ENOMEM);
991
    sc->stsc_count = entries;
992

    
993
    for(i=0; i<entries; i++) {
994
        sc->stsc_data[i].first = get_be32(pb);
995
        sc->stsc_data[i].count = get_be32(pb);
996
        sc->stsc_data[i].id = get_be32(pb);
997
    }
998
    return 0;
999
}
1000

    
1001
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1002
{
1003
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1004
    MOVStreamContext *sc = st->priv_data;
1005
    unsigned int i, entries;
1006

    
1007
    get_byte(pb); /* version */
1008
    get_be24(pb); /* flags */
1009

    
1010
    entries = get_be32(pb);
1011

    
1012
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1013

    
1014
    if(entries >= UINT_MAX / sizeof(int))
1015
        return -1;
1016
    sc->keyframes = av_malloc(entries * sizeof(int));
1017
    if (!sc->keyframes)
1018
        return AVERROR(ENOMEM);
1019
    sc->keyframe_count = entries;
1020

    
1021
    for(i=0; i<entries; i++) {
1022
        sc->keyframes[i] = get_be32(pb);
1023
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1024
    }
1025
    return 0;
1026
}
1027

    
1028
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1029
{
1030
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1031
    MOVStreamContext *sc = st->priv_data;
1032
    unsigned int i, entries, sample_size;
1033

    
1034
    get_byte(pb); /* version */
1035
    get_be24(pb); /* flags */
1036

    
1037
    sample_size = get_be32(pb);
1038
    if (!sc->sample_size) /* do not overwrite value computed in stsd */
1039
        sc->sample_size = sample_size;
1040
    entries = get_be32(pb);
1041

    
1042
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1043

    
1044
    sc->sample_count = entries;
1045
    if (sample_size)
1046
        return 0;
1047

    
1048
    if(entries >= UINT_MAX / sizeof(int))
1049
        return -1;
1050
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1051
    if (!sc->sample_sizes)
1052
        return AVERROR(ENOMEM);
1053

    
1054
    for(i=0; i<entries; i++)
1055
        sc->sample_sizes[i] = get_be32(pb);
1056
    return 0;
1057
}
1058

    
1059
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1060
{
1061
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1062
    MOVStreamContext *sc = st->priv_data;
1063
    unsigned int i, entries;
1064
    int64_t duration=0;
1065
    int64_t total_sample_count=0;
1066

    
1067
    get_byte(pb); /* version */
1068
    get_be24(pb); /* flags */
1069
    entries = get_be32(pb);
1070

    
1071
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1072

    
1073
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1074
        return -1;
1075
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1076
    if (!sc->stts_data)
1077
        return AVERROR(ENOMEM);
1078
    sc->stts_count = entries;
1079

    
1080
    for(i=0; i<entries; i++) {
1081
        int sample_duration;
1082
        int sample_count;
1083

    
1084
        sample_count=get_be32(pb);
1085
        sample_duration = get_be32(pb);
1086
        sc->stts_data[i].count= sample_count;
1087
        sc->stts_data[i].duration= sample_duration;
1088

    
1089
        sc->time_rate= av_gcd(sc->time_rate, sample_duration);
1090

    
1091
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1092

    
1093
        duration+=(int64_t)sample_duration*sample_count;
1094
        total_sample_count+=sample_count;
1095
    }
1096

    
1097
    st->nb_frames= total_sample_count;
1098
    if(duration)
1099
        st->duration= duration;
1100
    return 0;
1101
}
1102

    
1103
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1104
{
1105
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1106
    MOVStreamContext *sc = st->priv_data;
1107
    unsigned int i, entries;
1108

    
1109
    get_byte(pb); /* version */
1110
    get_be24(pb); /* flags */
1111
    entries = get_be32(pb);
1112

    
1113
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1114

    
1115
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1116
        return -1;
1117
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1118
    if (!sc->ctts_data)
1119
        return AVERROR(ENOMEM);
1120
    sc->ctts_count = entries;
1121

    
1122
    for(i=0; i<entries; i++) {
1123
        int count    =get_be32(pb);
1124
        int duration =get_be32(pb);
1125

    
1126
        if (duration < 0) {
1127
            sc->wrong_dts = 1;
1128
            st->codec->has_b_frames = 1;
1129
        }
1130
        sc->ctts_data[i].count   = count;
1131
        sc->ctts_data[i].duration= duration;
1132

    
1133
        sc->time_rate= av_gcd(sc->time_rate, FFABS(duration));
1134
    }
1135
    return 0;
1136
}
1137

    
1138
static void mov_build_index(MOVContext *mov, AVStream *st)
1139
{
1140
    MOVStreamContext *sc = st->priv_data;
1141
    int64_t current_offset;
1142
    int64_t current_dts = 0;
1143
    unsigned int stts_index = 0;
1144
    unsigned int stsc_index = 0;
1145
    unsigned int stss_index = 0;
1146
    unsigned int i, j;
1147

    
1148
    /* adjust first dts according to edit list */
1149
    if (sc->time_offset) {
1150
        assert(sc->time_offset % sc->time_rate == 0);
1151
        current_dts = - (sc->time_offset / sc->time_rate);
1152
    }
1153

    
1154
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1155
    if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
1156
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1157
        unsigned int current_sample = 0;
1158
        unsigned int stts_sample = 0;
1159
        unsigned int keyframe, sample_size;
1160
        unsigned int distance = 0;
1161
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1162

    
1163
        st->nb_frames = sc->sample_count;
1164
        for (i = 0; i < sc->chunk_count; i++) {
1165
            current_offset = sc->chunk_offsets[i];
1166
            if (stsc_index + 1 < sc->stsc_count &&
1167
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1168
                stsc_index++;
1169
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1170
                if (current_sample >= sc->sample_count) {
1171
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1172
                    return;
1173
                }
1174
                keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index];
1175
                if (keyframe) {
1176
                    distance = 0;
1177
                    if (stss_index + 1 < sc->keyframe_count)
1178
                        stss_index++;
1179
                }
1180
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1181
                if(sc->pseudo_stream_id == -1 ||
1182
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1183
                    av_add_index_entry(st, current_offset, current_dts, sample_size, distance,
1184
                                    keyframe ? AVINDEX_KEYFRAME : 0);
1185
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1186
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1187
                            current_offset, current_dts, sample_size, distance, keyframe);
1188
                }
1189

    
1190
                current_offset += sample_size;
1191
                assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
1192
                current_dts += sc->stts_data[stts_index].duration / sc->time_rate;
1193
                distance++;
1194
                stts_sample++;
1195
                current_sample++;
1196
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1197
                    stts_sample = 0;
1198
                    stts_index++;
1199
                }
1200
            }
1201
        }
1202
    } else { /* read whole chunk */
1203
        unsigned int chunk_samples, chunk_size, chunk_duration;
1204
        unsigned int frames = 1;
1205
        for (i = 0; i < sc->chunk_count; i++) {
1206
            current_offset = sc->chunk_offsets[i];
1207
            if (stsc_index + 1 < sc->stsc_count &&
1208
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1209
                stsc_index++;
1210
            chunk_samples = sc->stsc_data[stsc_index].count;
1211
            /* get chunk size, beware of alaw/ulaw/mace */
1212
            if (sc->samples_per_frame > 0 &&
1213
                (chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
1214
                if (sc->samples_per_frame < 160)
1215
                    chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame;
1216
                else {
1217
                    chunk_size = sc->bytes_per_frame;
1218
                    frames = chunk_samples / sc->samples_per_frame;
1219
                    chunk_samples = sc->samples_per_frame;
1220
                }
1221
            } else
1222
                chunk_size = chunk_samples * sc->sample_size;
1223
            for (j = 0; j < frames; j++) {
1224
                av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
1225
                /* get chunk duration */
1226
                chunk_duration = 0;
1227
                while (chunk_samples > 0) {
1228
                    if (chunk_samples < sc->stts_data[stts_index].count) {
1229
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1230
                        sc->stts_data[stts_index].count -= chunk_samples;
1231
                        break;
1232
                    } else {
1233
                        chunk_duration += sc->stts_data[stts_index].duration * chunk_samples;
1234
                        chunk_samples -= sc->stts_data[stts_index].count;
1235
                        if (stts_index + 1 < sc->stts_count)
1236
                            stts_index++;
1237
                    }
1238
                }
1239
                current_offset += sc->bytes_per_frame;
1240
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1241
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1242
                        chunk_size, chunk_duration);
1243
                assert(chunk_duration % sc->time_rate == 0);
1244
                current_dts += chunk_duration / sc->time_rate;
1245
            }
1246
        }
1247
    }
1248
}
1249

    
1250
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1251
{
1252
    AVStream *st;
1253
    MOVStreamContext *sc;
1254
    int ret;
1255

    
1256
    st = av_new_stream(c->fc, c->fc->nb_streams);
1257
    if (!st) return AVERROR(ENOMEM);
1258
    sc = av_mallocz(sizeof(MOVStreamContext));
1259
    if (!sc) return AVERROR(ENOMEM);
1260

    
1261
    st->priv_data = sc;
1262
    st->codec->codec_type = CODEC_TYPE_DATA;
1263
    sc->ffindex = st->index;
1264

    
1265
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1266
        return ret;
1267

    
1268
    /* sanity checks */
1269
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1270
                            (!sc->sample_size && !sc->sample_count))) {
1271
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1272
               st->index);
1273
        return 0;
1274
    }
1275

    
1276
    if (!sc->time_rate)
1277
        sc->time_rate = 1;
1278
    if (!sc->time_scale)
1279
        sc->time_scale = c->time_scale;
1280

    
1281
    av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
1282

    
1283
    if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
1284
        !st->codec->frame_size && sc->stts_count == 1) {
1285
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1286
                                           st->codec->sample_rate, sc->time_scale);
1287
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1288
    }
1289

    
1290
    if (st->duration != AV_NOPTS_VALUE) {
1291
        assert(st->duration % sc->time_rate == 0);
1292
        st->duration /= sc->time_rate;
1293
    }
1294

    
1295
    mov_build_index(c, st);
1296

    
1297
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1298
        if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0)
1299
            av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
1300
                   st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
1301
    } else
1302
        sc->pb = c->fc->pb;
1303

    
1304
    switch (st->codec->codec_id) {
1305
#if CONFIG_H261_DECODER
1306
    case CODEC_ID_H261:
1307
#endif
1308
#if CONFIG_H263_DECODER
1309
    case CODEC_ID_H263:
1310
#endif
1311
#if CONFIG_MPEG4_DECODER
1312
    case CODEC_ID_MPEG4:
1313
#endif
1314
        st->codec->width = 0; /* let decoder init width/height */
1315
        st->codec->height= 0;
1316
        break;
1317
    }
1318

    
1319
    /* Do not need those anymore. */
1320
    av_freep(&sc->chunk_offsets);
1321
    av_freep(&sc->stsc_data);
1322
    av_freep(&sc->sample_sizes);
1323
    av_freep(&sc->keyframes);
1324
    av_freep(&sc->stts_data);
1325

    
1326
    return 0;
1327
}
1328

    
1329
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1330
{
1331
    int ret;
1332
    c->itunes_metadata = 1;
1333
    ret = mov_read_default(c, pb, atom);
1334
    c->itunes_metadata = 0;
1335
    return ret;
1336
}
1337

    
1338
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1339
{
1340
    while (atom.size > 8) {
1341
        uint32_t tag = get_le32(pb);
1342
        atom.size -= 4;
1343
        if (tag == MKTAG('h','d','l','r')) {
1344
            url_fseek(pb, -8, SEEK_CUR);
1345
            atom.size += 8;
1346
            return mov_read_default(c, pb, atom);
1347
        }
1348
    }
1349
    return 0;
1350
}
1351

    
1352
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1353
{
1354
    char track[16];
1355
    get_be32(pb); // type
1356
    get_be32(pb); // unknown
1357
    snprintf(track, sizeof(track), "%d", get_be32(pb));
1358
    av_metadata_set(&c->fc->metadata, "track", track);
1359
    dprintf(c->fc, "%.4s %s\n", (char*)&atom.type, track);
1360
    return 0;
1361
}
1362

    
1363
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1364
{
1365
    char str[1024], key2[16], language[4] = {0};
1366
    const char *key = NULL;
1367
    uint16_t str_size;
1368

    
1369
    if (c->itunes_metadata) {
1370
        int data_size = get_be32(pb);
1371
        int tag = get_le32(pb);
1372
        if (tag == MKTAG('d','a','t','a')) {
1373
            get_be32(pb); // type
1374
            get_be32(pb); // unknown
1375
            str_size = data_size - 16;
1376
            atom.size -= 16;
1377
        } else return 0;
1378
    } else {
1379
        str_size = get_be16(pb); // string length
1380
        ff_mov_lang_to_iso639(get_be16(pb), language);
1381
        atom.size -= 4;
1382
    }
1383
    switch (atom.type) {
1384
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
1385
    case MKTAG(0xa9,'a','u','t'):
1386
    case MKTAG(0xa9,'A','R','T'):
1387
    case MKTAG(0xa9,'w','r','t'): key = "author";    break;
1388
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
1389
    case MKTAG(0xa9,'c','m','t'):
1390
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
1391
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
1392
    case MKTAG(0xa9,'d','a','y'): key = "year";      break;
1393
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
1394
    case MKTAG(0xa9,'t','o','o'):
1395
    case MKTAG(0xa9,'e','n','c'): key = "muxer";     break;
1396
    }
1397
    if (!key)
1398
        return 0;
1399
    if (atom.size < 0)
1400
        return -1;
1401

    
1402
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
1403
    get_buffer(pb, str, str_size);
1404
    str[str_size] = 0;
1405
    av_metadata_set(&c->fc->metadata, key, str);
1406
    if (*language && strcmp(language, "und")) {
1407
        snprintf(key2, sizeof(key2), "%s-%s", key, language);
1408
        av_metadata_set(&c->fc->metadata, key2, str);
1409
    }
1410
    dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size);
1411
    return 0;
1412
}
1413

    
1414
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1415
{
1416
    int i;
1417
    int width;
1418
    int height;
1419
    int64_t disp_transform[2];
1420
    int display_matrix[3][2];
1421
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1422
    MOVStreamContext *sc = st->priv_data;
1423
    int version = get_byte(pb);
1424

    
1425
    get_be24(pb); /* flags */
1426
    /*
1427
    MOV_TRACK_ENABLED 0x0001
1428
    MOV_TRACK_IN_MOVIE 0x0002
1429
    MOV_TRACK_IN_PREVIEW 0x0004
1430
    MOV_TRACK_IN_POSTER 0x0008
1431
    */
1432

    
1433
    if (version == 1) {
1434
        get_be64(pb);
1435
        get_be64(pb);
1436
    } else {
1437
        get_be32(pb); /* creation time */
1438
        get_be32(pb); /* modification time */
1439
    }
1440
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1441
    get_be32(pb); /* reserved */
1442

    
1443
    /* highlevel (considering edits) duration in movie timebase */
1444
    (version == 1) ? get_be64(pb) : get_be32(pb);
1445
    get_be32(pb); /* reserved */
1446
    get_be32(pb); /* reserved */
1447

    
1448
    get_be16(pb); /* layer */
1449
    get_be16(pb); /* alternate group */
1450
    get_be16(pb); /* volume */
1451
    get_be16(pb); /* reserved */
1452

    
1453
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1454
    // they're kept in fixed point format through all calculations
1455
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1456
    for (i = 0; i < 3; i++) {
1457
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1458
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1459
        get_be32(pb);           // 2.30 fixed point (not used)
1460
    }
1461

    
1462
    width = get_be32(pb);       // 16.16 fixed point track width
1463
    height = get_be32(pb);      // 16.16 fixed point track height
1464
    sc->width = width >> 16;
1465
    sc->height = height >> 16;
1466

    
1467
    //transform the display width/height according to the matrix
1468
    // skip this if the display matrix is the default identity matrix
1469
    // to keep the same scale, use [width height 1<<16]
1470
    if (width && height &&
1471
        (display_matrix[0][0] != 65536 || display_matrix[0][1]           ||
1472
        display_matrix[1][0]           || display_matrix[1][1] != 65536  ||
1473
        display_matrix[2][0]           || display_matrix[2][1])) {
1474
        for (i = 0; i < 2; i++)
1475
            disp_transform[i] =
1476
                (int64_t)  width  * display_matrix[0][i] +
1477
                (int64_t)  height * display_matrix[1][i] +
1478
                ((int64_t) display_matrix[2][i] << 16);
1479

    
1480
        //sample aspect ratio is new width/height divided by old width/height
1481
        st->sample_aspect_ratio = av_d2q(
1482
            ((double) disp_transform[0] * height) /
1483
            ((double) disp_transform[1] * width), INT_MAX);
1484
    }
1485
    return 0;
1486
}
1487

    
1488
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1489
{
1490
    MOVFragment *frag = &c->fragment;
1491
    MOVTrackExt *trex = NULL;
1492
    int flags, track_id, i;
1493

    
1494
    get_byte(pb); /* version */
1495
    flags = get_be24(pb);
1496

    
1497
    track_id = get_be32(pb);
1498
    if (!track_id)
1499
        return -1;
1500
    frag->track_id = track_id;
1501
    for (i = 0; i < c->trex_count; i++)
1502
        if (c->trex_data[i].track_id == frag->track_id) {
1503
            trex = &c->trex_data[i];
1504
            break;
1505
        }
1506
    if (!trex) {
1507
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1508
        return -1;
1509
    }
1510

    
1511
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1512
    else              frag->base_data_offset = frag->moof_offset;
1513
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1514
    else              frag->stsd_id          = trex->stsd_id;
1515

    
1516
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1517
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1518
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1519
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1520
    return 0;
1521
}
1522

    
1523
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1524
{
1525
    MOVTrackExt *trex;
1526

    
1527
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1528
        return -1;
1529
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1530
    if (!trex)
1531
        return AVERROR(ENOMEM);
1532
    c->trex_data = trex;
1533
    trex = &c->trex_data[c->trex_count++];
1534
    get_byte(pb); /* version */
1535
    get_be24(pb); /* flags */
1536
    trex->track_id = get_be32(pb);
1537
    trex->stsd_id  = get_be32(pb);
1538
    trex->duration = get_be32(pb);
1539
    trex->size     = get_be32(pb);
1540
    trex->flags    = get_be32(pb);
1541
    return 0;
1542
}
1543

    
1544
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1545
{
1546
    MOVFragment *frag = &c->fragment;
1547
    AVStream *st = NULL;
1548
    MOVStreamContext *sc;
1549
    uint64_t offset;
1550
    int64_t dts;
1551
    int data_offset = 0;
1552
    unsigned entries, first_sample_flags = frag->flags;
1553
    int flags, distance, i;
1554

    
1555
    for (i = 0; i < c->fc->nb_streams; i++) {
1556
        if (c->fc->streams[i]->id == frag->track_id) {
1557
            st = c->fc->streams[i];
1558
            break;
1559
        }
1560
    }
1561
    if (!st) {
1562
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1563
        return -1;
1564
    }
1565
    sc = st->priv_data;
1566
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1567
        return 0;
1568
    get_byte(pb); /* version */
1569
    flags = get_be24(pb);
1570
    entries = get_be32(pb);
1571
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1572
    if (flags & 0x001) data_offset        = get_be32(pb);
1573
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1574
    if (flags & 0x800) {
1575
        MOVStts *ctts_data;
1576
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1577
            return -1;
1578
        ctts_data = av_realloc(sc->ctts_data,
1579
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1580
        if (!ctts_data)
1581
            return AVERROR(ENOMEM);
1582
        sc->ctts_data = ctts_data;
1583
    }
1584
    dts = st->duration;
1585
    offset = frag->base_data_offset + data_offset;
1586
    distance = 0;
1587
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1588
    for (i = 0; i < entries; i++) {
1589
        unsigned sample_size = frag->size;
1590
        int sample_flags = i ? frag->flags : first_sample_flags;
1591
        unsigned sample_duration = frag->duration;
1592
        int keyframe;
1593

    
1594
        if (flags & 0x100) sample_duration = get_be32(pb);
1595
        if (flags & 0x200) sample_size     = get_be32(pb);
1596
        if (flags & 0x400) sample_flags    = get_be32(pb);
1597
        if (flags & 0x800) {
1598
            sc->ctts_data[sc->ctts_count].count = 1;
1599
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
1600
            sc->ctts_count++;
1601
        }
1602
        if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
1603
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
1604
            distance = 0;
1605
        av_add_index_entry(st, offset, dts, sample_size, distance,
1606
                           keyframe ? AVINDEX_KEYFRAME : 0);
1607
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1608
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
1609
                offset, dts, sample_size, distance, keyframe);
1610
        distance++;
1611
        assert(sample_duration % sc->time_rate == 0);
1612
        dts += sample_duration / sc->time_rate;
1613
        offset += sample_size;
1614
    }
1615
    frag->moof_offset = offset;
1616
    st->duration = dts;
1617
    return 0;
1618
}
1619

    
1620
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1621
/* like the files created with Adobe Premiere 5.0, for samples see */
1622
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1623
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1624
{
1625
    int err;
1626

    
1627
    if (atom.size < 8)
1628
        return 0; /* continue */
1629
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1630
        url_fskip(pb, atom.size - 4);
1631
        return 0;
1632
    }
1633
    atom.type = get_le32(pb);
1634
    atom.offset += 8;
1635
    atom.size -= 8;
1636
    if (atom.type != MKTAG('m','d','a','t')) {
1637
        url_fskip(pb, atom.size);
1638
        return 0;
1639
    }
1640
    err = mov_read_mdat(c, pb, atom);
1641
    return err;
1642
}
1643

    
1644
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1645
{
1646
#if CONFIG_ZLIB
1647
    ByteIOContext ctx;
1648
    uint8_t *cmov_data;
1649
    uint8_t *moov_data; /* uncompressed data */
1650
    long cmov_len, moov_len;
1651
    int ret = -1;
1652

    
1653
    get_be32(pb); /* dcom atom */
1654
    if (get_le32(pb) != MKTAG('d','c','o','m'))
1655
        return -1;
1656
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
1657
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
1658
        return -1;
1659
    }
1660
    get_be32(pb); /* cmvd atom */
1661
    if (get_le32(pb) != MKTAG('c','m','v','d'))
1662
        return -1;
1663
    moov_len = get_be32(pb); /* uncompressed size */
1664
    cmov_len = atom.size - 6 * 4;
1665

    
1666
    cmov_data = av_malloc(cmov_len);
1667
    if (!cmov_data)
1668
        return AVERROR(ENOMEM);
1669
    moov_data = av_malloc(moov_len);
1670
    if (!moov_data) {
1671
        av_free(cmov_data);
1672
        return AVERROR(ENOMEM);
1673
    }
1674
    get_buffer(pb, cmov_data, cmov_len);
1675
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1676
        goto free_and_return;
1677
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
1678
        goto free_and_return;
1679
    atom.type = MKTAG('m','o','o','v');
1680
    atom.offset = 0;
1681
    atom.size = moov_len;
1682
#ifdef DEBUG
1683
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1684
#endif
1685
    ret = mov_read_default(c, &ctx, atom);
1686
free_and_return:
1687
    av_free(moov_data);
1688
    av_free(cmov_data);
1689
    return ret;
1690
#else
1691
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
1692
    return -1;
1693
#endif
1694
}
1695

    
1696
/* edit list atom */
1697
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1698
{
1699
    MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
1700
    int i, edit_count;
1701

    
1702
    get_byte(pb); /* version */
1703
    get_be24(pb); /* flags */
1704
    edit_count = get_be32(pb); /* entries */
1705

    
1706
    for(i=0; i<edit_count; i++){
1707
        int time;
1708
        get_be32(pb); /* Track duration */
1709
        time = get_be32(pb); /* Media time */
1710
        get_be32(pb); /* Media rate */
1711
        if (i == 0 && time != -1) {
1712
            sc->time_offset = time;
1713
            sc->time_rate = av_gcd(sc->time_rate, time);
1714
        }
1715
    }
1716

    
1717
    if(edit_count > 1)
1718
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
1719
               "a/v desync might occur, patch welcome\n");
1720

    
1721
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
1722
    return 0;
1723
}
1724

    
1725
static const MOVParseTableEntry mov_default_parse_table[] = {
1726
{ MKTAG('a','v','s','s'), mov_read_extradata },
1727
{ MKTAG('c','o','6','4'), mov_read_stco },
1728
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
1729
{ MKTAG('d','i','n','f'), mov_read_default },
1730
{ MKTAG('d','r','e','f'), mov_read_dref },
1731
{ MKTAG('e','d','t','s'), mov_read_default },
1732
{ MKTAG('e','l','s','t'), mov_read_elst },
1733
{ MKTAG('e','n','d','a'), mov_read_enda },
1734
{ MKTAG('f','i','e','l'), mov_read_extradata },
1735
{ MKTAG('f','t','y','p'), mov_read_ftyp },
1736
{ MKTAG('g','l','b','l'), mov_read_glbl },
1737
{ MKTAG('h','d','l','r'), mov_read_hdlr },
1738
{ MKTAG('i','l','s','t'), mov_read_ilst },
1739
{ MKTAG('j','p','2','h'), mov_read_extradata },
1740
{ MKTAG('m','d','a','t'), mov_read_mdat },
1741
{ MKTAG('m','d','h','d'), mov_read_mdhd },
1742
{ MKTAG('m','d','i','a'), mov_read_default },
1743
{ MKTAG('m','e','t','a'), mov_read_meta },
1744
{ MKTAG('m','i','n','f'), mov_read_default },
1745
{ MKTAG('m','o','o','f'), mov_read_moof },
1746
{ MKTAG('m','o','o','v'), mov_read_moov },
1747
{ MKTAG('m','v','e','x'), mov_read_default },
1748
{ MKTAG('m','v','h','d'), mov_read_mvhd },
1749
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
1750
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
1751
{ MKTAG('a','v','c','C'), mov_read_glbl },
1752
{ MKTAG('p','a','s','p'), mov_read_pasp },
1753
{ MKTAG('s','t','b','l'), mov_read_default },
1754
{ MKTAG('s','t','c','o'), mov_read_stco },
1755
{ MKTAG('s','t','s','c'), mov_read_stsc },
1756
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
1757
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
1758
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
1759
{ MKTAG('s','t','t','s'), mov_read_stts },
1760
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
1761
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
1762
{ MKTAG('t','r','a','k'), mov_read_trak },
1763
{ MKTAG('t','r','a','f'), mov_read_default },
1764
{ MKTAG('t','r','e','x'), mov_read_trex },
1765
{ MKTAG('t','r','k','n'), mov_read_trkn },
1766
{ MKTAG('t','r','u','n'), mov_read_trun },
1767
{ MKTAG('u','d','t','a'), mov_read_default },
1768
{ MKTAG('w','a','v','e'), mov_read_wave },
1769
{ MKTAG('e','s','d','s'), mov_read_esds },
1770
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
1771
{ MKTAG('c','m','o','v'), mov_read_cmov },
1772
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
1773
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
1774
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
1775
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1776
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
1777
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
1778
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
1779
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
1780
{ MKTAG(0xa9,'a','u','t'), mov_read_udta_string },
1781
{ MKTAG(0xa9,'d','a','y'), mov_read_udta_string },
1782
{ MKTAG(0xa9,'g','e','n'), mov_read_udta_string },
1783
{ MKTAG(0xa9,'e','n','c'), mov_read_udta_string },
1784
{ MKTAG(0xa9,'t','o','o'), mov_read_udta_string },
1785
{ 0, NULL }
1786
};
1787

    
1788
static int mov_probe(AVProbeData *p)
1789
{
1790
    unsigned int offset;
1791
    uint32_t tag;
1792
    int score = 0;
1793

    
1794
    /* check file header */
1795
    offset = 0;
1796
    for(;;) {
1797
        /* ignore invalid offset */
1798
        if ((offset + 8) > (unsigned int)p->buf_size)
1799
            return score;
1800
        tag = AV_RL32(p->buf + offset + 4);
1801
        switch(tag) {
1802
        /* check for obvious tags */
1803
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
1804
        case MKTAG('m','o','o','v'):
1805
        case MKTAG('m','d','a','t'):
1806
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
1807
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
1808
        case MKTAG('f','t','y','p'):
1809
            return AVPROBE_SCORE_MAX;
1810
        /* those are more common words, so rate then a bit less */
1811
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
1812
        case MKTAG('w','i','d','e'):
1813
        case MKTAG('f','r','e','e'):
1814
        case MKTAG('j','u','n','k'):
1815
        case MKTAG('p','i','c','t'):
1816
            return AVPROBE_SCORE_MAX - 5;
1817
        case MKTAG(0x82,0x82,0x7f,0x7d):
1818
        case MKTAG('s','k','i','p'):
1819
        case MKTAG('u','u','i','d'):
1820
        case MKTAG('p','r','f','l'):
1821
            offset = AV_RB32(p->buf+offset) + offset;
1822
            /* if we only find those cause probedata is too small at least rate them */
1823
            score = AVPROBE_SCORE_MAX - 50;
1824
            break;
1825
        default:
1826
            /* unrecognized tag */
1827
            return score;
1828
        }
1829
    }
1830
    return score;
1831
}
1832

    
1833
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1834
{
1835
    MOVContext *mov = s->priv_data;
1836
    ByteIOContext *pb = s->pb;
1837
    int err;
1838
    MOVAtom atom = { 0, 0, 0 };
1839

    
1840
    mov->fc = s;
1841
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1842
    if(!url_is_streamed(pb))
1843
        atom.size = url_fsize(pb);
1844
    else
1845
        atom.size = INT64_MAX;
1846

    
1847
    /* check MOV header */
1848
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
1849
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
1850
        return err;
1851
    }
1852
    if (!mov->found_moov) {
1853
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
1854
        return -1;
1855
    }
1856
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
1857

    
1858
    return 0;
1859
}
1860

    
1861
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1862
{
1863
    MOVContext *mov = s->priv_data;
1864
    MOVStreamContext *sc = 0;
1865
    AVIndexEntry *sample = 0;
1866
    int64_t best_dts = INT64_MAX;
1867
    int i, ret;
1868
 retry:
1869
    for (i = 0; i < s->nb_streams; i++) {
1870
        AVStream *st = s->streams[i];
1871
        MOVStreamContext *msc = st->priv_data;
1872
        if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < st->nb_index_entries) {
1873
            AVIndexEntry *current_sample = &st->index_entries[msc->current_sample];
1874
            int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate,
1875
                                     AV_TIME_BASE, msc->time_scale);
1876
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
1877
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
1878
                (!url_is_streamed(s->pb) &&
1879
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
1880
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
1881
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
1882
                sample = current_sample;
1883
                best_dts = dts;
1884
                sc = msc;
1885
            }
1886
        }
1887
    }
1888
    if (!sample) {
1889
        mov->found_mdat = 0;
1890
        if (!url_is_streamed(s->pb) ||
1891
            mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
1892
            url_feof(s->pb))
1893
            return -1;
1894
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
1895
        goto retry;
1896
    }
1897
    /* must be done just before reading, to avoid infinite loop on sample */
1898
    sc->current_sample++;
1899
    if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
1900
        av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
1901
               sc->ffindex, sample->pos);
1902
        return -1;
1903
    }
1904
    ret = av_get_packet(sc->pb, pkt, sample->size);
1905
    if (ret < 0)
1906
        return ret;
1907
#if CONFIG_DV_DEMUXER
1908
    if (mov->dv_demux && sc->dv_audio_container) {
1909
        dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
1910
        av_free(pkt->data);
1911
        pkt->size = 0;
1912
        if (dv_get_packet(mov->dv_demux, pkt) < 0)
1913
            return -1;
1914
    }
1915
#endif
1916
    pkt->stream_index = sc->ffindex;
1917
    pkt->dts = sample->timestamp;
1918
    if (sc->ctts_data) {
1919
        assert(sc->ctts_data[sc->ctts_index].duration % sc->time_rate == 0);
1920
        pkt->pts = pkt->dts + sc->ctts_data[sc->ctts_index].duration / sc->time_rate;
1921
        /* update ctts context */
1922
        sc->ctts_sample++;
1923
        if (sc->ctts_index < sc->ctts_count &&
1924
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
1925
            sc->ctts_index++;
1926
            sc->ctts_sample = 0;
1927
        }
1928
        if (sc->wrong_dts)
1929
            pkt->dts = AV_NOPTS_VALUE;
1930
    } else {
1931
        AVStream *st = s->streams[sc->ffindex];
1932
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
1933
            st->index_entries[sc->current_sample].timestamp : st->duration;
1934
        pkt->duration = next_dts - pkt->dts;
1935
        pkt->pts = pkt->dts;
1936
    }
1937
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
1938
    pkt->pos = sample->pos;
1939
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
1940
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
1941
    return 0;
1942
}
1943

    
1944
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags)
1945
{
1946
    MOVStreamContext *sc = st->priv_data;
1947
    int sample, time_sample;
1948
    int i;
1949

    
1950
    sample = av_index_search_timestamp(st, timestamp, flags);
1951
    dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
1952
    if (sample < 0) /* not sure what to do */
1953
        return -1;
1954
    sc->current_sample = sample;
1955
    dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
1956
    /* adjust ctts index */
1957
    if (sc->ctts_data) {
1958
        time_sample = 0;
1959
        for (i = 0; i < sc->ctts_count; i++) {
1960
            int next = time_sample + sc->ctts_data[i].count;
1961
            if (next > sc->current_sample) {
1962
                sc->ctts_index = i;
1963
                sc->ctts_sample = sc->current_sample - time_sample;
1964
                break;
1965
            }
1966
            time_sample = next;
1967
        }
1968
    }
1969
    return sample;
1970
}
1971

    
1972
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1973
{
1974
    AVStream *st;
1975
    int64_t seek_timestamp, timestamp;
1976
    int sample;
1977
    int i;
1978

    
1979
    if (stream_index >= s->nb_streams)
1980
        return -1;
1981
    if (sample_time < 0)
1982
        sample_time = 0;
1983

    
1984
    st = s->streams[stream_index];
1985
    sample = mov_seek_stream(st, sample_time, flags);
1986
    if (sample < 0)
1987
        return -1;
1988

    
1989
    /* adjust seek timestamp to found sample timestamp */
1990
    seek_timestamp = st->index_entries[sample].timestamp;
1991

    
1992
    for (i = 0; i < s->nb_streams; i++) {
1993
        st = s->streams[i];
1994
        if (stream_index == i || st->discard == AVDISCARD_ALL)
1995
            continue;
1996

    
1997
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
1998
        mov_seek_stream(st, timestamp, flags);
1999
    }
2000
    return 0;
2001
}
2002

    
2003
static int mov_read_close(AVFormatContext *s)
2004
{
2005
    MOVContext *mov = s->priv_data;
2006
    int i, j;
2007

    
2008
    for (i = 0; i < s->nb_streams; i++) {
2009
        AVStream *st = s->streams[i];
2010
        MOVStreamContext *sc = st->priv_data;
2011

    
2012
        av_freep(&sc->ctts_data);
2013
        for (j = 0; j < sc->drefs_count; j++)
2014
            av_freep(&sc->drefs[j].path);
2015
        av_freep(&sc->drefs);
2016
        if (sc->pb && sc->pb != s->pb)
2017
            url_fclose(sc->pb);
2018

    
2019
        av_freep(&st->codec->palctrl);
2020
    }
2021

    
2022
    if (mov->dv_demux) {
2023
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2024
            av_freep(&mov->dv_fctx->streams[i]->codec);
2025
            av_freep(&mov->dv_fctx->streams[i]);
2026
        }
2027
        av_freep(&mov->dv_fctx);
2028
        av_freep(&mov->dv_demux);
2029
    }
2030

    
2031
    av_freep(&mov->trex_data);
2032

    
2033
    return 0;
2034
}
2035

    
2036
AVInputFormat mov_demuxer = {
2037
    "mov,mp4,m4a,3gp,3g2,mj2",
2038
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2039
    sizeof(MOVContext),
2040
    mov_probe,
2041
    mov_read_header,
2042
    mov_read_packet,
2043
    mov_read_close,
2044
    mov_read_seek,
2045
};