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ffmpeg / libavformat / mov.c @ f59d8ff8

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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.
7
 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
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#include <limits.h>
24

    
25
//#define DEBUG
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//#define DEBUG_METADATA
27
//#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 "avio_internal.h"
33
#include "riff.h"
34
#include "isom.h"
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#include "libavcodec/get_bits.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:
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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 :))
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
72
 <0: error occurred, exit
73
*/
74
/* links atom IDs to parse functions */
75
typedef struct MOVParseTableEntry {
76
    uint32_t type;
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    int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
78
} MOVParseTableEntry;
79

    
80
static const MOVParseTableEntry mov_default_parse_table[];
81

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

    
86
    avio_rb16(pb); // unknown
87
    snprintf(buf, sizeof(buf), "%d", avio_rb16(pb));
88
    av_metadata_set2(&c->fc->metadata, "track", buf, 0);
89

    
90
    avio_rb16(pb); // total tracks
91

    
92
    return 0;
93
}
94

    
95
static const uint32_t mac_to_unicode[128] = {
96
    0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
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    0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
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    0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
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    0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
100
    0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
101
    0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
102
    0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
103
    0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
104
    0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
105
    0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
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    0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
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    0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
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    0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
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    0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
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    0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
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    0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
112
};
113

    
114
static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len,
115
                               char *dst, int dstlen)
116
{
117
    char *p = dst;
118
    char *end = dst+dstlen-1;
119
    int i;
120

    
121
    for (i = 0; i < len; i++) {
122
        uint8_t t, c = avio_r8(pb);
123
        if (c < 0x80 && p < end)
124
            *p++ = c;
125
        else
126
            PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
127
    }
128
    *p = 0;
129
    return p - dst;
130
}
131

    
132
static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
133
{
134
#ifdef MOV_EXPORT_ALL_METADATA
135
    char tmp_key[5];
136
#endif
137
    char str[1024], key2[16], language[4] = {0};
138
    const char *key = NULL;
139
    uint16_t str_size, langcode = 0;
140
    uint32_t data_type = 0;
141
    int (*parse)(MOVContext*, AVIOContext*, unsigned) = NULL;
142

    
143
    switch (atom.type) {
144
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
145
    case MKTAG(0xa9,'a','u','t'):
146
    case MKTAG(0xa9,'A','R','T'): key = "artist";    break;
147
    case MKTAG(0xa9,'w','r','t'): key = "composer";  break;
148
    case MKTAG( 'c','p','r','t'):
149
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
150
    case MKTAG(0xa9,'c','m','t'):
151
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
152
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
153
    case MKTAG(0xa9,'d','a','y'): key = "date";      break;
154
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
155
    case MKTAG(0xa9,'t','o','o'):
156
    case MKTAG(0xa9,'s','w','r'): key = "encoder";   break;
157
    case MKTAG(0xa9,'e','n','c'): key = "encoder";   break;
158
    case MKTAG( 'd','e','s','c'): key = "description";break;
159
    case MKTAG( 'l','d','e','s'): key = "synopsis";  break;
160
    case MKTAG( 't','v','s','h'): key = "show";      break;
161
    case MKTAG( 't','v','e','n'): key = "episode_id";break;
162
    case MKTAG( 't','v','n','n'): key = "network";   break;
163
    case MKTAG( 't','r','k','n'): key = "track";
164
        parse = mov_metadata_trkn; break;
165
    }
166

    
167
    if (c->itunes_metadata && atom.size > 8) {
168
        int data_size = avio_rb32(pb);
169
        int tag = avio_rl32(pb);
170
        if (tag == MKTAG('d','a','t','a')) {
171
            data_type = avio_rb32(pb); // type
172
            avio_rb32(pb); // unknown
173
            str_size = data_size - 16;
174
            atom.size -= 16;
175
        } else return 0;
176
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
177
        str_size = avio_rb16(pb); // string length
178
        langcode = avio_rb16(pb);
179
        ff_mov_lang_to_iso639(langcode, language);
180
        atom.size -= 4;
181
    } else
182
        str_size = atom.size;
183

    
184
#ifdef MOV_EXPORT_ALL_METADATA
185
    if (!key) {
186
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
187
        key = tmp_key;
188
    }
189
#endif
190

    
191
    if (!key)
192
        return 0;
193
    if (atom.size < 0)
194
        return -1;
195

    
196
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
197

    
198
    if (parse)
199
        parse(c, pb, str_size);
200
    else {
201
        if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
202
            mov_read_mac_string(c, pb, str_size, str, sizeof(str));
203
        } else {
204
            avio_read(pb, str, str_size);
205
            str[str_size] = 0;
206
        }
207
        av_metadata_set2(&c->fc->metadata, key, str, 0);
208
        if (*language && strcmp(language, "und")) {
209
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
210
            av_metadata_set2(&c->fc->metadata, key2, str, 0);
211
        }
212
    }
213
#ifdef DEBUG_METADATA
214
    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
215
    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
216
           key, str, (char*)&atom.type, str_size, atom.size);
217
#endif
218

    
219
    return 0;
220
}
221

    
222
static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
223
{
224
    int64_t start;
225
    int i, nb_chapters, str_len, version;
226
    char str[256+1];
227

    
228
    if ((atom.size -= 5) < 0)
229
        return 0;
230

    
231
    version = avio_r8(pb);
232
    avio_rb24(pb);
233
    if (version)
234
        avio_rb32(pb); // ???
235
    nb_chapters = avio_r8(pb);
236

    
237
    for (i = 0; i < nb_chapters; i++) {
238
        if (atom.size < 9)
239
            return 0;
240

    
241
        start = avio_rb64(pb);
242
        str_len = avio_r8(pb);
243

    
244
        if ((atom.size -= 9+str_len) < 0)
245
            return 0;
246

    
247
        avio_read(pb, str, str_len);
248
        str[str_len] = 0;
249
        ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
250
    }
251
    return 0;
252
}
253

    
254
static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
255
{
256
    int64_t total_size = 0;
257
    MOVAtom a;
258
    int i;
259

    
260
    if (atom.size < 0)
261
        atom.size = INT64_MAX;
262
    while (total_size + 8 < atom.size && !url_feof(pb)) {
263
        int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL;
264
        a.size = atom.size;
265
        a.type=0;
266
        if(atom.size >= 8) {
267
            a.size = avio_rb32(pb);
268
            a.type = avio_rl32(pb);
269
        }
270
        av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
271
                a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
272
        total_size += 8;
273
        if (a.size == 1) { /* 64 bit extended size */
274
            a.size = avio_rb64(pb) - 8;
275
            total_size += 8;
276
        }
277
        if (a.size == 0) {
278
            a.size = atom.size - total_size;
279
            if (a.size <= 8)
280
                break;
281
        }
282
        a.size -= 8;
283
        if(a.size < 0)
284
            break;
285
        a.size = FFMIN(a.size, atom.size - total_size);
286

    
287
        for (i = 0; mov_default_parse_table[i].type; i++)
288
            if (mov_default_parse_table[i].type == a.type) {
289
                parse = mov_default_parse_table[i].parse;
290
                break;
291
            }
292

    
293
        // container is user data
294
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
295
                       atom.type == MKTAG('i','l','s','t')))
296
            parse = mov_read_udta_string;
297

    
298
        if (!parse) { /* skip leaf atoms data */
299
            url_fskip(pb, a.size);
300
        } else {
301
            int64_t start_pos = url_ftell(pb);
302
            int64_t left;
303
            int err = parse(c, pb, a);
304
            if (err < 0)
305
                return err;
306
            if (c->found_moov && c->found_mdat &&
307
                (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
308
                return 0;
309
            left = a.size - url_ftell(pb) + start_pos;
310
            if (left > 0) /* skip garbage at atom end */
311
                url_fskip(pb, left);
312
        }
313

    
314
        total_size += a.size;
315
    }
316

    
317
    if (total_size < atom.size && atom.size < 0x7ffff)
318
        url_fskip(pb, atom.size - total_size);
319

    
320
    return 0;
321
}
322

    
323
static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
324
{
325
    AVStream *st;
326
    MOVStreamContext *sc;
327
    int entries, i, j;
328

    
329
    if (c->fc->nb_streams < 1)
330
        return 0;
331
    st = c->fc->streams[c->fc->nb_streams-1];
332
    sc = st->priv_data;
333

    
334
    avio_rb32(pb); // version + flags
335
    entries = avio_rb32(pb);
336
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
337
        return -1;
338
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
339
    if (!sc->drefs)
340
        return AVERROR(ENOMEM);
341
    sc->drefs_count = entries;
342

    
343
    for (i = 0; i < sc->drefs_count; i++) {
344
        MOVDref *dref = &sc->drefs[i];
345
        uint32_t size = avio_rb32(pb);
346
        int64_t next = url_ftell(pb) + size - 4;
347

    
348
        if (size < 12)
349
            return -1;
350

    
351
        dref->type = avio_rl32(pb);
352
        avio_rb32(pb); // version + flags
353
        av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
354

    
355
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
356
            /* macintosh alias record */
357
            uint16_t volume_len, len;
358
            int16_t type;
359

    
360
            url_fskip(pb, 10);
361

    
362
            volume_len = avio_r8(pb);
363
            volume_len = FFMIN(volume_len, 27);
364
            avio_read(pb, dref->volume, 27);
365
            dref->volume[volume_len] = 0;
366
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
367

    
368
            url_fskip(pb, 12);
369

    
370
            len = avio_r8(pb);
371
            len = FFMIN(len, 63);
372
            avio_read(pb, dref->filename, 63);
373
            dref->filename[len] = 0;
374
            av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
375

    
376
            url_fskip(pb, 16);
377

    
378
            /* read next level up_from_alias/down_to_target */
379
            dref->nlvl_from = avio_rb16(pb);
380
            dref->nlvl_to   = avio_rb16(pb);
381
            av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
382
                   dref->nlvl_from, dref->nlvl_to);
383

    
384
            url_fskip(pb, 16);
385

    
386
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
387
                type = avio_rb16(pb);
388
                len = avio_rb16(pb);
389
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
390
                if (len&1)
391
                    len += 1;
392
                if (type == 2) { // absolute path
393
                    av_free(dref->path);
394
                    dref->path = av_mallocz(len+1);
395
                    if (!dref->path)
396
                        return AVERROR(ENOMEM);
397
                    avio_read(pb, dref->path, len);
398
                    if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
399
                        len -= volume_len;
400
                        memmove(dref->path, dref->path+volume_len, len);
401
                        dref->path[len] = 0;
402
                    }
403
                    for (j = 0; j < len; j++)
404
                        if (dref->path[j] == ':')
405
                            dref->path[j] = '/';
406
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
407
                } else if (type == 0) { // directory name
408
                    av_free(dref->dir);
409
                    dref->dir = av_malloc(len+1);
410
                    if (!dref->dir)
411
                        return AVERROR(ENOMEM);
412
                    avio_read(pb, dref->dir, len);
413
                    dref->dir[len] = 0;
414
                    for (j = 0; j < len; j++)
415
                        if (dref->dir[j] == ':')
416
                            dref->dir[j] = '/';
417
                    av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
418
                } else
419
                    url_fskip(pb, len);
420
            }
421
        }
422
        avio_seek(pb, next, SEEK_SET);
423
    }
424
    return 0;
425
}
426

    
427
static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
428
{
429
    AVStream *st;
430
    uint32_t type;
431
    uint32_t ctype;
432

    
433
    if (c->fc->nb_streams < 1) // meta before first trak
434
        return 0;
435

    
436
    st = c->fc->streams[c->fc->nb_streams-1];
437

    
438
    avio_r8(pb); /* version */
439
    avio_rb24(pb); /* flags */
440

    
441
    /* component type */
442
    ctype = avio_rl32(pb);
443
    type = avio_rl32(pb); /* component subtype */
444

    
445
    av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
446
    av_dlog(c->fc, "stype= %.4s\n", (char*)&type);
447

    
448
    if     (type == MKTAG('v','i','d','e'))
449
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
450
    else if(type == MKTAG('s','o','u','n'))
451
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
452
    else if(type == MKTAG('m','1','a',' '))
453
        st->codec->codec_id = CODEC_ID_MP2;
454
    else if(type == MKTAG('s','u','b','p'))
455
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
456

    
457
    avio_rb32(pb); /* component  manufacture */
458
    avio_rb32(pb); /* component flags */
459
    avio_rb32(pb); /* component flags mask */
460

    
461
    return 0;
462
}
463

    
464
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
465
{
466
    AVStream *st;
467
    int tag, len;
468

    
469
    if (fc->nb_streams < 1)
470
        return 0;
471
    st = fc->streams[fc->nb_streams-1];
472

    
473
    avio_rb32(pb); /* version + flags */
474
    len = ff_mp4_read_descr(fc, pb, &tag);
475
    if (tag == MP4ESDescrTag) {
476
        avio_rb16(pb); /* ID */
477
        avio_r8(pb); /* priority */
478
    } else
479
        avio_rb16(pb); /* ID */
480

    
481
    len = ff_mp4_read_descr(fc, pb, &tag);
482
    if (tag == MP4DecConfigDescrTag)
483
        ff_mp4_read_dec_config_descr(fc, st, pb);
484
    return 0;
485
}
486

    
487
static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
488
{
489
    return ff_mov_read_esds(c->fc, pb, atom);
490
}
491

    
492
static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)
493
{
494
    AVStream *st;
495
    int ac3info, acmod, lfeon;
496

    
497
    if (c->fc->nb_streams < 1)
498
        return 0;
499
    st = c->fc->streams[c->fc->nb_streams-1];
500

    
501
    ac3info = avio_rb24(pb);
502
    acmod = (ac3info >> 11) & 0x7;
503
    lfeon = (ac3info >> 10) & 0x1;
504
    st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
505

    
506
    return 0;
507
}
508

    
509
static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
510
{
511
    const int num = avio_rb32(pb);
512
    const int den = avio_rb32(pb);
513
    AVStream *st;
514

    
515
    if (c->fc->nb_streams < 1)
516
        return 0;
517
    st = c->fc->streams[c->fc->nb_streams-1];
518

    
519
    if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
520
        (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
521
        av_log(c->fc, AV_LOG_WARNING,
522
               "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
523
               st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
524
               num, den);
525
    } else if (den != 0) {
526
        st->sample_aspect_ratio.num = num;
527
        st->sample_aspect_ratio.den = den;
528
    }
529
    return 0;
530
}
531

    
532
/* this atom contains actual media data */
533
static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
534
{
535
    if(atom.size == 0) /* wrong one (MP4) */
536
        return 0;
537
    c->found_mdat=1;
538
    return 0; /* now go for moov */
539
}
540

    
541
/* read major brand, minor version and compatible brands and store them as metadata */
542
static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
543
{
544
    uint32_t minor_ver;
545
    int comp_brand_size;
546
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
547
    char* comp_brands_str;
548
    uint8_t type[5] = {0};
549

    
550
    avio_read(pb, type, 4);
551
    if (strcmp(type, "qt  "))
552
        c->isom = 1;
553
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
554
    av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
555
    minor_ver = avio_rb32(pb); /* minor version */
556
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
557
    av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
558

    
559
    comp_brand_size = atom.size - 8;
560
    if (comp_brand_size < 0)
561
        return -1;
562
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
563
    if (!comp_brands_str)
564
        return AVERROR(ENOMEM);
565
    avio_read(pb, comp_brands_str, comp_brand_size);
566
    comp_brands_str[comp_brand_size] = 0;
567
    av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
568
    av_freep(&comp_brands_str);
569

    
570
    return 0;
571
}
572

    
573
/* this atom should contain all header atoms */
574
static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
575
{
576
    if (mov_read_default(c, pb, atom) < 0)
577
        return -1;
578
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
579
    /* so we don't parse the whole file if over a network */
580
    c->found_moov=1;
581
    return 0; /* now go for mdat */
582
}
583

    
584
static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
585
{
586
    c->fragment.moof_offset = url_ftell(pb) - 8;
587
    av_dlog(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
588
    return mov_read_default(c, pb, atom);
589
}
590

    
591
static void mov_metadata_creation_time(AVMetadata **metadata, time_t time)
592
{
593
    char buffer[32];
594
    if (time) {
595
        struct tm *ptm;
596
        time -= 2082844800;  /* seconds between 1904-01-01 and Epoch */
597
        ptm = gmtime(&time);
598
        if (!ptm) return;
599
        strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
600
        av_metadata_set2(metadata, "creation_time", buffer, 0);
601
    }
602
}
603

    
604
static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
605
{
606
    AVStream *st;
607
    MOVStreamContext *sc;
608
    int version;
609
    char language[4] = {0};
610
    unsigned lang;
611
    time_t creation_time;
612

    
613
    if (c->fc->nb_streams < 1)
614
        return 0;
615
    st = c->fc->streams[c->fc->nb_streams-1];
616
    sc = st->priv_data;
617

    
618
    version = avio_r8(pb);
619
    if (version > 1)
620
        return -1; /* unsupported */
621

    
622
    avio_rb24(pb); /* flags */
623
    if (version == 1) {
624
        creation_time = avio_rb64(pb);
625
        avio_rb64(pb);
626
    } else {
627
        creation_time = avio_rb32(pb);
628
        avio_rb32(pb); /* modification time */
629
    }
630
    mov_metadata_creation_time(&st->metadata, creation_time);
631

    
632
    sc->time_scale = avio_rb32(pb);
633
    st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
634

    
635
    lang = avio_rb16(pb); /* language */
636
    if (ff_mov_lang_to_iso639(lang, language))
637
        av_metadata_set2(&st->metadata, "language", language, 0);
638
    avio_rb16(pb); /* quality */
639

    
640
    return 0;
641
}
642

    
643
static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
644
{
645
    time_t creation_time;
646
    int version = avio_r8(pb); /* version */
647
    avio_rb24(pb); /* flags */
648

    
649
    if (version == 1) {
650
        creation_time = avio_rb64(pb);
651
        avio_rb64(pb);
652
    } else {
653
        creation_time = avio_rb32(pb);
654
        avio_rb32(pb); /* modification time */
655
    }
656
    mov_metadata_creation_time(&c->fc->metadata, creation_time);
657
    c->time_scale = avio_rb32(pb); /* time scale */
658

    
659
    av_dlog(c->fc, "time scale = %i\n", c->time_scale);
660

    
661
    c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
662
    avio_rb32(pb); /* preferred scale */
663

    
664
    avio_rb16(pb); /* preferred volume */
665

    
666
    url_fskip(pb, 10); /* reserved */
667

    
668
    url_fskip(pb, 36); /* display matrix */
669

    
670
    avio_rb32(pb); /* preview time */
671
    avio_rb32(pb); /* preview duration */
672
    avio_rb32(pb); /* poster time */
673
    avio_rb32(pb); /* selection time */
674
    avio_rb32(pb); /* selection duration */
675
    avio_rb32(pb); /* current time */
676
    avio_rb32(pb); /* next track ID */
677

    
678
    return 0;
679
}
680

    
681
static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
682
{
683
    AVStream *st;
684

    
685
    if (c->fc->nb_streams < 1)
686
        return 0;
687
    st = c->fc->streams[c->fc->nb_streams-1];
688

    
689
    if((uint64_t)atom.size > (1<<30))
690
        return -1;
691

    
692
    // currently SVQ3 decoder expect full STSD header - so let's fake it
693
    // this should be fixed and just SMI header should be passed
694
    av_free(st->codec->extradata);
695
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
696
    if (!st->codec->extradata)
697
        return AVERROR(ENOMEM);
698
    st->codec->extradata_size = 0x5a + atom.size;
699
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
700
    avio_read(pb, st->codec->extradata + 0x5a, atom.size);
701
    av_dlog(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
702
    return 0;
703
}
704

    
705
static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
706
{
707
    AVStream *st;
708
    int little_endian;
709

    
710
    if (c->fc->nb_streams < 1)
711
        return 0;
712
    st = c->fc->streams[c->fc->nb_streams-1];
713

    
714
    little_endian = avio_rb16(pb);
715
    av_dlog(c->fc, "enda %d\n", little_endian);
716
    if (little_endian == 1) {
717
        switch (st->codec->codec_id) {
718
        case CODEC_ID_PCM_S24BE:
719
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
720
            break;
721
        case CODEC_ID_PCM_S32BE:
722
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
723
            break;
724
        case CODEC_ID_PCM_F32BE:
725
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
726
            break;
727
        case CODEC_ID_PCM_F64BE:
728
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
729
            break;
730
        default:
731
            break;
732
        }
733
    }
734
    return 0;
735
}
736

    
737
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
738
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
739
{
740
    AVStream *st;
741
    uint64_t size;
742
    uint8_t *buf;
743

    
744
    if (c->fc->nb_streams < 1) // will happen with jp2 files
745
        return 0;
746
    st= c->fc->streams[c->fc->nb_streams-1];
747
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
748
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
749
        return -1;
750
    buf= av_realloc(st->codec->extradata, size);
751
    if(!buf)
752
        return -1;
753
    st->codec->extradata= buf;
754
    buf+= st->codec->extradata_size;
755
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
756
    AV_WB32(       buf    , atom.size + 8);
757
    AV_WL32(       buf + 4, atom.type);
758
    avio_read(pb, buf + 8, atom.size);
759
    return 0;
760
}
761

    
762
static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
763
{
764
    AVStream *st;
765

    
766
    if (c->fc->nb_streams < 1)
767
        return 0;
768
    st = c->fc->streams[c->fc->nb_streams-1];
769

    
770
    if((uint64_t)atom.size > (1<<30))
771
        return -1;
772

    
773
    if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
774
        // pass all frma atom to codec, needed at least for QDMC and QDM2
775
        av_free(st->codec->extradata);
776
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
777
        if (!st->codec->extradata)
778
            return AVERROR(ENOMEM);
779
        st->codec->extradata_size = atom.size;
780
        avio_read(pb, st->codec->extradata, atom.size);
781
    } else if (atom.size > 8) { /* to read frma, esds atoms */
782
        if (mov_read_default(c, pb, atom) < 0)
783
            return -1;
784
    } else
785
        url_fskip(pb, atom.size);
786
    return 0;
787
}
788

    
789
/**
790
 * This function reads atom content and puts data in extradata without tag
791
 * nor size unlike mov_read_extradata.
792
 */
793
static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
794
{
795
    AVStream *st;
796

    
797
    if (c->fc->nb_streams < 1)
798
        return 0;
799
    st = c->fc->streams[c->fc->nb_streams-1];
800

    
801
    if((uint64_t)atom.size > (1<<30))
802
        return -1;
803

    
804
    av_free(st->codec->extradata);
805
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
806
    if (!st->codec->extradata)
807
        return AVERROR(ENOMEM);
808
    st->codec->extradata_size = atom.size;
809
    avio_read(pb, st->codec->extradata, atom.size);
810
    return 0;
811
}
812

    
813
/**
814
 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
815
 * but can have extradata appended at the end after the 40 bytes belonging
816
 * to the struct.
817
 */
818
static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
819
{
820
    AVStream *st;
821

    
822
    if (c->fc->nb_streams < 1)
823
        return 0;
824
    if (atom.size <= 40)
825
        return 0;
826
    st = c->fc->streams[c->fc->nb_streams-1];
827

    
828
    if((uint64_t)atom.size > (1<<30))
829
        return -1;
830

    
831
    av_free(st->codec->extradata);
832
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
833
    if (!st->codec->extradata)
834
        return AVERROR(ENOMEM);
835
    st->codec->extradata_size = atom.size - 40;
836
    url_fskip(pb, 40);
837
    avio_read(pb, st->codec->extradata, atom.size - 40);
838
    return 0;
839
}
840

    
841
static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
842
{
843
    AVStream *st;
844
    MOVStreamContext *sc;
845
    unsigned int i, entries;
846

    
847
    if (c->fc->nb_streams < 1)
848
        return 0;
849
    st = c->fc->streams[c->fc->nb_streams-1];
850
    sc = st->priv_data;
851

    
852
    avio_r8(pb); /* version */
853
    avio_rb24(pb); /* flags */
854

    
855
    entries = avio_rb32(pb);
856

    
857
    if(entries >= UINT_MAX/sizeof(int64_t))
858
        return -1;
859

    
860
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
861
    if (!sc->chunk_offsets)
862
        return AVERROR(ENOMEM);
863
    sc->chunk_count = entries;
864

    
865
    if      (atom.type == MKTAG('s','t','c','o'))
866
        for(i=0; i<entries; i++)
867
            sc->chunk_offsets[i] = avio_rb32(pb);
868
    else if (atom.type == MKTAG('c','o','6','4'))
869
        for(i=0; i<entries; i++)
870
            sc->chunk_offsets[i] = avio_rb64(pb);
871
    else
872
        return -1;
873

    
874
    return 0;
875
}
876

    
877
/**
878
 * Compute codec id for 'lpcm' tag.
879
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
880
 */
881
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
882
{
883
    if (flags & 1) { // floating point
884
        if (flags & 2) { // big endian
885
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
886
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
887
        } else {
888
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
889
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
890
        }
891
    } else {
892
        if (flags & 2) {
893
            if      (bps == 8)
894
                // signed integer
895
                if (flags & 4)  return CODEC_ID_PCM_S8;
896
                else            return CODEC_ID_PCM_U8;
897
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
898
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
899
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
900
        } else {
901
            if      (bps == 8)
902
                if (flags & 4)  return CODEC_ID_PCM_S8;
903
                else            return CODEC_ID_PCM_U8;
904
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
905
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
906
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
907
        }
908
    }
909
    return CODEC_ID_NONE;
910
}
911

    
912
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
913
{
914
    AVStream *st;
915
    MOVStreamContext *sc;
916
    int j, pseudo_stream_id;
917

    
918
    if (c->fc->nb_streams < 1)
919
        return 0;
920
    st = c->fc->streams[c->fc->nb_streams-1];
921
    sc = st->priv_data;
922

    
923
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
924
        //Parsing Sample description table
925
        enum CodecID id;
926
        int dref_id = 1;
927
        MOVAtom a = { AV_RL32("stsd") };
928
        int64_t start_pos = url_ftell(pb);
929
        int size = avio_rb32(pb); /* size */
930
        uint32_t format = avio_rl32(pb); /* data format */
931

    
932
        if (size >= 16) {
933
            avio_rb32(pb); /* reserved */
934
            avio_rb16(pb); /* reserved */
935
            dref_id = avio_rb16(pb);
936
        }
937

    
938
        if (st->codec->codec_tag &&
939
            st->codec->codec_tag != format &&
940
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
941
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
942
           ){
943
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
944
             * export it as a separate AVStream but this needs a few changes
945
             * in the MOV demuxer, patch welcome. */
946
        multiple_stsd:
947
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
948
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
949
            continue;
950
        }
951
        /* we cannot demux concatenated h264 streams because of different extradata */
952
        if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
953
            goto multiple_stsd;
954
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
955
        sc->dref_id= dref_id;
956

    
957
        st->codec->codec_tag = format;
958
        id = ff_codec_get_id(codec_movaudio_tags, format);
959
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
960
            id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
961

    
962
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
963
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
964
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
965
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
966
            id = ff_codec_get_id(codec_movvideo_tags, format);
967
            if (id <= 0)
968
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
969
            if (id > 0)
970
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
971
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
972
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
973
                if(id > 0)
974
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
975
            }
976
        }
977

    
978
        av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
979
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
980
                (format >> 24) & 0xff, st->codec->codec_type);
981

    
982
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
983
            unsigned int color_depth, len;
984
            int color_greyscale;
985

    
986
            st->codec->codec_id = id;
987
            avio_rb16(pb); /* version */
988
            avio_rb16(pb); /* revision level */
989
            avio_rb32(pb); /* vendor */
990
            avio_rb32(pb); /* temporal quality */
991
            avio_rb32(pb); /* spatial quality */
992

    
993
            st->codec->width = avio_rb16(pb); /* width */
994
            st->codec->height = avio_rb16(pb); /* height */
995

    
996
            avio_rb32(pb); /* horiz resolution */
997
            avio_rb32(pb); /* vert resolution */
998
            avio_rb32(pb); /* data size, always 0 */
999
            avio_rb16(pb); /* frames per samples */
1000

    
1001
            len = avio_r8(pb); /* codec name, pascal string */
1002
            if (len > 31)
1003
                len = 31;
1004
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1005
            if (len < 31)
1006
                url_fskip(pb, 31 - len);
1007
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
1008
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1009
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1010

    
1011
            st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1012
            st->codec->color_table_id = avio_rb16(pb); /* colortable id */
1013
            av_dlog(c->fc, "depth %d, ctab id %d\n",
1014
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
1015
            /* figure out the palette situation */
1016
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
1017
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1018

    
1019
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
1020
            if ((color_depth == 2) || (color_depth == 4) ||
1021
                (color_depth == 8)) {
1022
                /* for palette traversal */
1023
                unsigned int color_start, color_count, color_end;
1024
                unsigned char r, g, b;
1025

    
1026
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1027
                if (color_greyscale) {
1028
                    int color_index, color_dec;
1029
                    /* compute the greyscale palette */
1030
                    st->codec->bits_per_coded_sample = color_depth;
1031
                    color_count = 1 << color_depth;
1032
                    color_index = 255;
1033
                    color_dec = 256 / (color_count - 1);
1034
                    for (j = 0; j < color_count; j++) {
1035
                        r = g = b = color_index;
1036
                        st->codec->palctrl->palette[j] =
1037
                            (r << 16) | (g << 8) | (b);
1038
                        color_index -= color_dec;
1039
                        if (color_index < 0)
1040
                            color_index = 0;
1041
                    }
1042
                } else if (st->codec->color_table_id) {
1043
                    const uint8_t *color_table;
1044
                    /* if flag bit 3 is set, use the default palette */
1045
                    color_count = 1 << color_depth;
1046
                    if (color_depth == 2)
1047
                        color_table = ff_qt_default_palette_4;
1048
                    else if (color_depth == 4)
1049
                        color_table = ff_qt_default_palette_16;
1050
                    else
1051
                        color_table = ff_qt_default_palette_256;
1052

    
1053
                    for (j = 0; j < color_count; j++) {
1054
                        r = color_table[j * 3 + 0];
1055
                        g = color_table[j * 3 + 1];
1056
                        b = color_table[j * 3 + 2];
1057
                        st->codec->palctrl->palette[j] =
1058
                            (r << 16) | (g << 8) | (b);
1059
                    }
1060
                } else {
1061
                    /* load the palette from the file */
1062
                    color_start = avio_rb32(pb);
1063
                    color_count = avio_rb16(pb);
1064
                    color_end = avio_rb16(pb);
1065
                    if ((color_start <= 255) &&
1066
                        (color_end <= 255)) {
1067
                        for (j = color_start; j <= color_end; j++) {
1068
                            /* each R, G, or B component is 16 bits;
1069
                             * only use the top 8 bits; skip alpha bytes
1070
                             * up front */
1071
                            avio_r8(pb);
1072
                            avio_r8(pb);
1073
                            r = avio_r8(pb);
1074
                            avio_r8(pb);
1075
                            g = avio_r8(pb);
1076
                            avio_r8(pb);
1077
                            b = avio_r8(pb);
1078
                            avio_r8(pb);
1079
                            st->codec->palctrl->palette[j] =
1080
                                (r << 16) | (g << 8) | (b);
1081
                        }
1082
                    }
1083
                }
1084
                st->codec->palctrl->palette_changed = 1;
1085
            }
1086
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1087
            int bits_per_sample, flags;
1088
            uint16_t version = avio_rb16(pb);
1089

    
1090
            st->codec->codec_id = id;
1091
            avio_rb16(pb); /* revision level */
1092
            avio_rb32(pb); /* vendor */
1093

    
1094
            st->codec->channels = avio_rb16(pb);             /* channel count */
1095
            av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1096
            st->codec->bits_per_coded_sample = avio_rb16(pb);      /* sample size */
1097

    
1098
            sc->audio_cid = avio_rb16(pb);
1099
            avio_rb16(pb); /* packet size = 0 */
1100

    
1101
            st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1102

    
1103
            //Read QT version 1 fields. In version 0 these do not exist.
1104
            av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1105
            if(!c->isom) {
1106
                if(version==1) {
1107
                    sc->samples_per_frame = avio_rb32(pb);
1108
                    avio_rb32(pb); /* bytes per packet */
1109
                    sc->bytes_per_frame = avio_rb32(pb);
1110
                    avio_rb32(pb); /* bytes per sample */
1111
                } else if(version==2) {
1112
                    avio_rb32(pb); /* sizeof struct only */
1113
                    st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */
1114
                    st->codec->channels = avio_rb32(pb);
1115
                    avio_rb32(pb); /* always 0x7F000000 */
1116
                    st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1117
                    flags = avio_rb32(pb); /* lpcm format specific flag */
1118
                    sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1119
                    sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1120
                    if (format == MKTAG('l','p','c','m'))
1121
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1122
                }
1123
            }
1124

    
1125
            switch (st->codec->codec_id) {
1126
            case CODEC_ID_PCM_S8:
1127
            case CODEC_ID_PCM_U8:
1128
                if (st->codec->bits_per_coded_sample == 16)
1129
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1130
                break;
1131
            case CODEC_ID_PCM_S16LE:
1132
            case CODEC_ID_PCM_S16BE:
1133
                if (st->codec->bits_per_coded_sample == 8)
1134
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1135
                else if (st->codec->bits_per_coded_sample == 24)
1136
                    st->codec->codec_id =
1137
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1138
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1139
                break;
1140
            /* set values for old format before stsd version 1 appeared */
1141
            case CODEC_ID_MACE3:
1142
                sc->samples_per_frame = 6;
1143
                sc->bytes_per_frame = 2*st->codec->channels;
1144
                break;
1145
            case CODEC_ID_MACE6:
1146
                sc->samples_per_frame = 6;
1147
                sc->bytes_per_frame = 1*st->codec->channels;
1148
                break;
1149
            case CODEC_ID_ADPCM_IMA_QT:
1150
                sc->samples_per_frame = 64;
1151
                sc->bytes_per_frame = 34*st->codec->channels;
1152
                break;
1153
            case CODEC_ID_GSM:
1154
                sc->samples_per_frame = 160;
1155
                sc->bytes_per_frame = 33;
1156
                break;
1157
            default:
1158
                break;
1159
            }
1160

    
1161
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1162
            if (bits_per_sample) {
1163
                st->codec->bits_per_coded_sample = bits_per_sample;
1164
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1165
            }
1166
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1167
            // ttxt stsd contains display flags, justification, background
1168
            // color, fonts, and default styles, so fake an atom to read it
1169
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1170
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1171
                mov_read_glbl(c, pb, fake_atom);
1172
            st->codec->codec_id= id;
1173
            st->codec->width = sc->width;
1174
            st->codec->height = sc->height;
1175
        } else {
1176
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1177
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1178
        }
1179
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1180
        a.size = size - (url_ftell(pb) - start_pos);
1181
        if (a.size > 8) {
1182
            if (mov_read_default(c, pb, a) < 0)
1183
                return -1;
1184
        } else if (a.size > 0)
1185
            url_fskip(pb, a.size);
1186
    }
1187

    
1188
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1189
        st->codec->sample_rate= sc->time_scale;
1190

    
1191
    /* special codec parameters handling */
1192
    switch (st->codec->codec_id) {
1193
#if CONFIG_DV_DEMUXER
1194
    case CODEC_ID_DVAUDIO:
1195
        c->dv_fctx = avformat_alloc_context();
1196
        c->dv_demux = dv_init_demux(c->dv_fctx);
1197
        if (!c->dv_demux) {
1198
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1199
            return -1;
1200
        }
1201
        sc->dv_audio_container = 1;
1202
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1203
        break;
1204
#endif
1205
    /* no ifdef since parameters are always those */
1206
    case CODEC_ID_QCELP:
1207
        // force sample rate for qcelp when not stored in mov
1208
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1209
            st->codec->sample_rate = 8000;
1210
        st->codec->frame_size= 160;
1211
        st->codec->channels= 1; /* really needed */
1212
        break;
1213
    case CODEC_ID_AMR_NB:
1214
    case CODEC_ID_AMR_WB:
1215
        st->codec->frame_size= sc->samples_per_frame;
1216
        st->codec->channels= 1; /* really needed */
1217
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1218
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1219
            st->codec->sample_rate = 8000;
1220
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1221
            st->codec->sample_rate = 16000;
1222
        break;
1223
    case CODEC_ID_MP2:
1224
    case CODEC_ID_MP3:
1225
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1226
        st->need_parsing = AVSTREAM_PARSE_FULL;
1227
        break;
1228
    case CODEC_ID_GSM:
1229
    case CODEC_ID_ADPCM_MS:
1230
    case CODEC_ID_ADPCM_IMA_WAV:
1231
        st->codec->frame_size = sc->samples_per_frame;
1232
        st->codec->block_align = sc->bytes_per_frame;
1233
        break;
1234
    case CODEC_ID_ALAC:
1235
        if (st->codec->extradata_size == 36) {
1236
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1237
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1238
            st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1239
        }
1240
        break;
1241
    default:
1242
        break;
1243
    }
1244

    
1245
    return 0;
1246
}
1247

    
1248
static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1249
{
1250
    int entries;
1251

    
1252
    avio_r8(pb); /* version */
1253
    avio_rb24(pb); /* flags */
1254
    entries = avio_rb32(pb);
1255

    
1256
    return ff_mov_read_stsd_entries(c, pb, entries);
1257
}
1258

    
1259
static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1260
{
1261
    AVStream *st;
1262
    MOVStreamContext *sc;
1263
    unsigned int i, entries;
1264

    
1265
    if (c->fc->nb_streams < 1)
1266
        return 0;
1267
    st = c->fc->streams[c->fc->nb_streams-1];
1268
    sc = st->priv_data;
1269

    
1270
    avio_r8(pb); /* version */
1271
    avio_rb24(pb); /* flags */
1272

    
1273
    entries = avio_rb32(pb);
1274

    
1275
    av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1276

    
1277
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1278
        return -1;
1279
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1280
    if (!sc->stsc_data)
1281
        return AVERROR(ENOMEM);
1282
    sc->stsc_count = entries;
1283

    
1284
    for(i=0; i<entries; i++) {
1285
        sc->stsc_data[i].first = avio_rb32(pb);
1286
        sc->stsc_data[i].count = avio_rb32(pb);
1287
        sc->stsc_data[i].id = avio_rb32(pb);
1288
    }
1289
    return 0;
1290
}
1291

    
1292
static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1293
{
1294
    AVStream *st;
1295
    MOVStreamContext *sc;
1296
    unsigned i, entries;
1297

    
1298
    if (c->fc->nb_streams < 1)
1299
        return 0;
1300
    st = c->fc->streams[c->fc->nb_streams-1];
1301
    sc = st->priv_data;
1302

    
1303
    avio_rb32(pb); // version + flags
1304

    
1305
    entries = avio_rb32(pb);
1306
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1307
        return -1;
1308
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1309
    if (!sc->stps_data)
1310
        return AVERROR(ENOMEM);
1311
    sc->stps_count = entries;
1312

    
1313
    for (i = 0; i < entries; i++) {
1314
        sc->stps_data[i] = avio_rb32(pb);
1315
        //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1316
    }
1317

    
1318
    return 0;
1319
}
1320

    
1321
static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1322
{
1323
    AVStream *st;
1324
    MOVStreamContext *sc;
1325
    unsigned int i, entries;
1326

    
1327
    if (c->fc->nb_streams < 1)
1328
        return 0;
1329
    st = c->fc->streams[c->fc->nb_streams-1];
1330
    sc = st->priv_data;
1331

    
1332
    avio_r8(pb); /* version */
1333
    avio_rb24(pb); /* flags */
1334

    
1335
    entries = avio_rb32(pb);
1336

    
1337
    av_dlog(c->fc, "keyframe_count = %d\n", entries);
1338

    
1339
    if(entries >= UINT_MAX / sizeof(int))
1340
        return -1;
1341
    sc->keyframes = av_malloc(entries * sizeof(int));
1342
    if (!sc->keyframes)
1343
        return AVERROR(ENOMEM);
1344
    sc->keyframe_count = entries;
1345

    
1346
    for(i=0; i<entries; i++) {
1347
        sc->keyframes[i] = avio_rb32(pb);
1348
        //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1349
    }
1350
    return 0;
1351
}
1352

    
1353
static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1354
{
1355
    AVStream *st;
1356
    MOVStreamContext *sc;
1357
    unsigned int i, entries, sample_size, field_size, num_bytes;
1358
    GetBitContext gb;
1359
    unsigned char* buf;
1360

    
1361
    if (c->fc->nb_streams < 1)
1362
        return 0;
1363
    st = c->fc->streams[c->fc->nb_streams-1];
1364
    sc = st->priv_data;
1365

    
1366
    avio_r8(pb); /* version */
1367
    avio_rb24(pb); /* flags */
1368

    
1369
    if (atom.type == MKTAG('s','t','s','z')) {
1370
        sample_size = avio_rb32(pb);
1371
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1372
            sc->sample_size = sample_size;
1373
        field_size = 32;
1374
    } else {
1375
        sample_size = 0;
1376
        avio_rb24(pb); /* reserved */
1377
        field_size = avio_r8(pb);
1378
    }
1379
    entries = avio_rb32(pb);
1380

    
1381
    av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1382

    
1383
    sc->sample_count = entries;
1384
    if (sample_size)
1385
        return 0;
1386

    
1387
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1388
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1389
        return -1;
1390
    }
1391

    
1392
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1393
        return -1;
1394
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1395
    if (!sc->sample_sizes)
1396
        return AVERROR(ENOMEM);
1397

    
1398
    num_bytes = (entries*field_size+4)>>3;
1399

    
1400
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1401
    if (!buf) {
1402
        av_freep(&sc->sample_sizes);
1403
        return AVERROR(ENOMEM);
1404
    }
1405

    
1406
    if (avio_read(pb, buf, num_bytes) < num_bytes) {
1407
        av_freep(&sc->sample_sizes);
1408
        av_free(buf);
1409
        return -1;
1410
    }
1411

    
1412
    init_get_bits(&gb, buf, 8*num_bytes);
1413

    
1414
    for(i=0; i<entries; i++)
1415
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1416

    
1417
    av_free(buf);
1418
    return 0;
1419
}
1420

    
1421
static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1422
{
1423
    AVStream *st;
1424
    MOVStreamContext *sc;
1425
    unsigned int i, entries;
1426
    int64_t duration=0;
1427
    int64_t total_sample_count=0;
1428

    
1429
    if (c->fc->nb_streams < 1)
1430
        return 0;
1431
    st = c->fc->streams[c->fc->nb_streams-1];
1432
    sc = st->priv_data;
1433

    
1434
    avio_r8(pb); /* version */
1435
    avio_rb24(pb); /* flags */
1436
    entries = avio_rb32(pb);
1437

    
1438
    av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1439

    
1440
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1441
        return -1;
1442
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1443
    if (!sc->stts_data)
1444
        return AVERROR(ENOMEM);
1445
    sc->stts_count = entries;
1446

    
1447
    for(i=0; i<entries; i++) {
1448
        int sample_duration;
1449
        int sample_count;
1450

    
1451
        sample_count=avio_rb32(pb);
1452
        sample_duration = avio_rb32(pb);
1453
        sc->stts_data[i].count= sample_count;
1454
        sc->stts_data[i].duration= sample_duration;
1455

    
1456
        av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1457

    
1458
        duration+=(int64_t)sample_duration*sample_count;
1459
        total_sample_count+=sample_count;
1460
    }
1461

    
1462
    st->nb_frames= total_sample_count;
1463
    if(duration)
1464
        st->duration= duration;
1465
    return 0;
1466
}
1467

    
1468
static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1469
{
1470
    AVStream *st;
1471
    MOVStreamContext *sc;
1472
    unsigned int i, entries;
1473

    
1474
    if (c->fc->nb_streams < 1)
1475
        return 0;
1476
    st = c->fc->streams[c->fc->nb_streams-1];
1477
    sc = st->priv_data;
1478

    
1479
    avio_r8(pb); /* version */
1480
    avio_rb24(pb); /* flags */
1481
    entries = avio_rb32(pb);
1482

    
1483
    av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1484

    
1485
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1486
        return -1;
1487
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1488
    if (!sc->ctts_data)
1489
        return AVERROR(ENOMEM);
1490
    sc->ctts_count = entries;
1491

    
1492
    for(i=0; i<entries; i++) {
1493
        int count    =avio_rb32(pb);
1494
        int duration =avio_rb32(pb);
1495

    
1496
        sc->ctts_data[i].count   = count;
1497
        sc->ctts_data[i].duration= duration;
1498
        if (duration < 0)
1499
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1500
    }
1501

    
1502
    av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1503

    
1504
    return 0;
1505
}
1506

    
1507
static void mov_build_index(MOVContext *mov, AVStream *st)
1508
{
1509
    MOVStreamContext *sc = st->priv_data;
1510
    int64_t current_offset;
1511
    int64_t current_dts = 0;
1512
    unsigned int stts_index = 0;
1513
    unsigned int stsc_index = 0;
1514
    unsigned int stss_index = 0;
1515
    unsigned int stps_index = 0;
1516
    unsigned int i, j;
1517
    uint64_t stream_size = 0;
1518

    
1519
    /* adjust first dts according to edit list */
1520
    if (sc->time_offset && mov->time_scale > 0) {
1521
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1522
        current_dts = -rescaled;
1523
        if (sc->ctts_data && sc->stts_data &&
1524
            sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1525
            /* more than 16 frames delay, dts are likely wrong
1526
               this happens with files created by iMovie */
1527
            sc->wrong_dts = 1;
1528
            st->codec->has_b_frames = 1;
1529
        }
1530
    }
1531

    
1532
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1533
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1534
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1535
        unsigned int current_sample = 0;
1536
        unsigned int stts_sample = 0;
1537
        unsigned int sample_size;
1538
        unsigned int distance = 0;
1539
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1540

    
1541
        current_dts -= sc->dts_shift;
1542

    
1543
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1544
            return;
1545
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1546
        if (!st->index_entries)
1547
            return;
1548
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1549

    
1550
        for (i = 0; i < sc->chunk_count; i++) {
1551
            current_offset = sc->chunk_offsets[i];
1552
            if (stsc_index + 1 < sc->stsc_count &&
1553
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1554
                stsc_index++;
1555
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1556
                int keyframe = 0;
1557
                if (current_sample >= sc->sample_count) {
1558
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1559
                    return;
1560
                }
1561

    
1562
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1563
                    keyframe = 1;
1564
                    if (stss_index + 1 < sc->keyframe_count)
1565
                        stss_index++;
1566
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1567
                    keyframe = 1;
1568
                    if (stps_index + 1 < sc->stps_count)
1569
                        stps_index++;
1570
                }
1571
                if (keyframe)
1572
                    distance = 0;
1573
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1574
                if(sc->pseudo_stream_id == -1 ||
1575
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1576
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1577
                    e->pos = current_offset;
1578
                    e->timestamp = current_dts;
1579
                    e->size = sample_size;
1580
                    e->min_distance = distance;
1581
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1582
                    av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1583
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1584
                            current_offset, current_dts, sample_size, distance, keyframe);
1585
                }
1586

    
1587
                current_offset += sample_size;
1588
                stream_size += sample_size;
1589
                current_dts += sc->stts_data[stts_index].duration;
1590
                distance++;
1591
                stts_sample++;
1592
                current_sample++;
1593
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1594
                    stts_sample = 0;
1595
                    stts_index++;
1596
                }
1597
            }
1598
        }
1599
        if (st->duration > 0)
1600
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1601
    } else {
1602
        unsigned chunk_samples, total = 0;
1603

    
1604
        // compute total chunk count
1605
        for (i = 0; i < sc->stsc_count; i++) {
1606
            unsigned count, chunk_count;
1607

    
1608
            chunk_samples = sc->stsc_data[i].count;
1609
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1610
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1611
                return;
1612
            }
1613

    
1614
            if (sc->samples_per_frame >= 160) { // gsm
1615
                count = chunk_samples / sc->samples_per_frame;
1616
            } else if (sc->samples_per_frame > 1) {
1617
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1618
                count = (chunk_samples+samples-1) / samples;
1619
            } else {
1620
                count = (chunk_samples+1023) / 1024;
1621
            }
1622

    
1623
            if (i < sc->stsc_count - 1)
1624
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1625
            else
1626
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1627
            total += chunk_count * count;
1628
        }
1629

    
1630
        av_dlog(mov->fc, "chunk count %d\n", total);
1631
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1632
            return;
1633
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1634
        if (!st->index_entries)
1635
            return;
1636
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1637

    
1638
        // populate index
1639
        for (i = 0; i < sc->chunk_count; i++) {
1640
            current_offset = sc->chunk_offsets[i];
1641
            if (stsc_index + 1 < sc->stsc_count &&
1642
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1643
                stsc_index++;
1644
            chunk_samples = sc->stsc_data[stsc_index].count;
1645

    
1646
            while (chunk_samples > 0) {
1647
                AVIndexEntry *e;
1648
                unsigned size, samples;
1649

    
1650
                if (sc->samples_per_frame >= 160) { // gsm
1651
                    samples = sc->samples_per_frame;
1652
                    size = sc->bytes_per_frame;
1653
                } else {
1654
                    if (sc->samples_per_frame > 1) {
1655
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1656
                                        sc->samples_per_frame, chunk_samples);
1657
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1658
                    } else {
1659
                        samples = FFMIN(1024, chunk_samples);
1660
                        size = samples * sc->sample_size;
1661
                    }
1662
                }
1663

    
1664
                if (st->nb_index_entries >= total) {
1665
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1666
                    return;
1667
                }
1668
                e = &st->index_entries[st->nb_index_entries++];
1669
                e->pos = current_offset;
1670
                e->timestamp = current_dts;
1671
                e->size = size;
1672
                e->min_distance = 0;
1673
                e->flags = AVINDEX_KEYFRAME;
1674
                av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1675
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1676
                        size, samples);
1677

    
1678
                current_offset += size;
1679
                current_dts += samples;
1680
                chunk_samples -= samples;
1681
            }
1682
        }
1683
    }
1684
}
1685

    
1686
static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)
1687
{
1688
    /* try relative path, we do not try the absolute because it can leak information about our
1689
       system to an attacker */
1690
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1691
        char filename[1024];
1692
        char *src_path;
1693
        int i, l;
1694

    
1695
        /* find a source dir */
1696
        src_path = strrchr(src, '/');
1697
        if (src_path)
1698
            src_path++;
1699
        else
1700
            src_path = src;
1701

    
1702
        /* find a next level down to target */
1703
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1704
            if (ref->path[l] == '/') {
1705
                if (i == ref->nlvl_to - 1)
1706
                    break;
1707
                else
1708
                    i++;
1709
            }
1710

    
1711
        /* compose filename if next level down to target was found */
1712
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1713
            memcpy(filename, src, src_path - src);
1714
            filename[src_path - src] = 0;
1715

    
1716
            for (i = 1; i < ref->nlvl_from; i++)
1717
                av_strlcat(filename, "../", 1024);
1718

    
1719
            av_strlcat(filename, ref->path + l + 1, 1024);
1720

    
1721
            if (!avio_open(pb, filename, URL_RDONLY))
1722
                return 0;
1723
        }
1724
    }
1725

    
1726
    return AVERROR(ENOENT);
1727
}
1728

    
1729
static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1730
{
1731
    AVStream *st;
1732
    MOVStreamContext *sc;
1733
    int ret;
1734

    
1735
    st = av_new_stream(c->fc, c->fc->nb_streams);
1736
    if (!st) return AVERROR(ENOMEM);
1737
    sc = av_mallocz(sizeof(MOVStreamContext));
1738
    if (!sc) return AVERROR(ENOMEM);
1739

    
1740
    st->priv_data = sc;
1741
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1742
    sc->ffindex = st->index;
1743

    
1744
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1745
        return ret;
1746

    
1747
    /* sanity checks */
1748
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1749
                            (!sc->sample_size && !sc->sample_count))) {
1750
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1751
               st->index);
1752
        return 0;
1753
    }
1754

    
1755
    if (sc->time_scale <= 0) {
1756
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1757
        sc->time_scale = c->time_scale;
1758
        if (sc->time_scale <= 0)
1759
            sc->time_scale = 1;
1760
    }
1761

    
1762
    av_set_pts_info(st, 64, 1, sc->time_scale);
1763

    
1764
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1765
        !st->codec->frame_size && sc->stts_count == 1) {
1766
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1767
                                           st->codec->sample_rate, sc->time_scale);
1768
        av_dlog(c->fc, "frame size %d\n", st->codec->frame_size);
1769
    }
1770

    
1771
    mov_build_index(c, st);
1772

    
1773
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1774
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1775
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1776
            av_log(c->fc, AV_LOG_ERROR,
1777
                   "stream %d, error opening alias: path='%s', dir='%s', "
1778
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1779
                   st->index, dref->path, dref->dir, dref->filename,
1780
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1781
    } else
1782
        sc->pb = c->fc->pb;
1783

    
1784
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1785
        if (!st->sample_aspect_ratio.num &&
1786
            (st->codec->width != sc->width || st->codec->height != sc->height)) {
1787
            st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1788
                                             ((double)st->codec->width * sc->height), INT_MAX);
1789
        }
1790

    
1791
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1792
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1793

    
1794
        if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
1795
            av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
1796
                      sc->time_scale, sc->stts_data[0].duration, INT_MAX);
1797
    }
1798

    
1799
    switch (st->codec->codec_id) {
1800
#if CONFIG_H261_DECODER
1801
    case CODEC_ID_H261:
1802
#endif
1803
#if CONFIG_H263_DECODER
1804
    case CODEC_ID_H263:
1805
#endif
1806
#if CONFIG_H264_DECODER
1807
    case CODEC_ID_H264:
1808
#endif
1809
#if CONFIG_MPEG4_DECODER
1810
    case CODEC_ID_MPEG4:
1811
#endif
1812
        st->codec->width = 0; /* let decoder init width/height */
1813
        st->codec->height= 0;
1814
        break;
1815
    }
1816

    
1817
    /* Do not need those anymore. */
1818
    av_freep(&sc->chunk_offsets);
1819
    av_freep(&sc->stsc_data);
1820
    av_freep(&sc->sample_sizes);
1821
    av_freep(&sc->keyframes);
1822
    av_freep(&sc->stts_data);
1823
    av_freep(&sc->stps_data);
1824

    
1825
    return 0;
1826
}
1827

    
1828
static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1829
{
1830
    int ret;
1831
    c->itunes_metadata = 1;
1832
    ret = mov_read_default(c, pb, atom);
1833
    c->itunes_metadata = 0;
1834
    return ret;
1835
}
1836

    
1837
static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1838
{
1839
    while (atom.size > 8) {
1840
        uint32_t tag = avio_rl32(pb);
1841
        atom.size -= 4;
1842
        if (tag == MKTAG('h','d','l','r')) {
1843
            avio_seek(pb, -8, SEEK_CUR);
1844
            atom.size += 8;
1845
            return mov_read_default(c, pb, atom);
1846
        }
1847
    }
1848
    return 0;
1849
}
1850

    
1851
static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1852
{
1853
    int i;
1854
    int width;
1855
    int height;
1856
    int64_t disp_transform[2];
1857
    int display_matrix[3][2];
1858
    AVStream *st;
1859
    MOVStreamContext *sc;
1860
    int version;
1861

    
1862
    if (c->fc->nb_streams < 1)
1863
        return 0;
1864
    st = c->fc->streams[c->fc->nb_streams-1];
1865
    sc = st->priv_data;
1866

    
1867
    version = avio_r8(pb);
1868
    avio_rb24(pb); /* flags */
1869
    /*
1870
    MOV_TRACK_ENABLED 0x0001
1871
    MOV_TRACK_IN_MOVIE 0x0002
1872
    MOV_TRACK_IN_PREVIEW 0x0004
1873
    MOV_TRACK_IN_POSTER 0x0008
1874
    */
1875

    
1876
    if (version == 1) {
1877
        avio_rb64(pb);
1878
        avio_rb64(pb);
1879
    } else {
1880
        avio_rb32(pb); /* creation time */
1881
        avio_rb32(pb); /* modification time */
1882
    }
1883
    st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
1884
    avio_rb32(pb); /* reserved */
1885

    
1886
    /* highlevel (considering edits) duration in movie timebase */
1887
    (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
1888
    avio_rb32(pb); /* reserved */
1889
    avio_rb32(pb); /* reserved */
1890

    
1891
    avio_rb16(pb); /* layer */
1892
    avio_rb16(pb); /* alternate group */
1893
    avio_rb16(pb); /* volume */
1894
    avio_rb16(pb); /* reserved */
1895

    
1896
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1897
    // they're kept in fixed point format through all calculations
1898
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1899
    for (i = 0; i < 3; i++) {
1900
        display_matrix[i][0] = avio_rb32(pb);   // 16.16 fixed point
1901
        display_matrix[i][1] = avio_rb32(pb);   // 16.16 fixed point
1902
        avio_rb32(pb);           // 2.30 fixed point (not used)
1903
    }
1904

    
1905
    width = avio_rb32(pb);       // 16.16 fixed point track width
1906
    height = avio_rb32(pb);      // 16.16 fixed point track height
1907
    sc->width = width >> 16;
1908
    sc->height = height >> 16;
1909

    
1910
    // transform the display width/height according to the matrix
1911
    // skip this if the display matrix is the default identity matrix
1912
    // or if it is rotating the picture, ex iPhone 3GS
1913
    // to keep the same scale, use [width height 1<<16]
1914
    if (width && height &&
1915
        ((display_matrix[0][0] != 65536  ||
1916
          display_matrix[1][1] != 65536) &&
1917
         !display_matrix[0][1] &&
1918
         !display_matrix[1][0] &&
1919
         !display_matrix[2][0] && !display_matrix[2][1])) {
1920
        for (i = 0; i < 2; i++)
1921
            disp_transform[i] =
1922
                (int64_t)  width  * display_matrix[0][i] +
1923
                (int64_t)  height * display_matrix[1][i] +
1924
                ((int64_t) display_matrix[2][i] << 16);
1925

    
1926
        //sample aspect ratio is new width/height divided by old width/height
1927
        st->sample_aspect_ratio = av_d2q(
1928
            ((double) disp_transform[0] * height) /
1929
            ((double) disp_transform[1] * width), INT_MAX);
1930
    }
1931
    return 0;
1932
}
1933

    
1934
static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1935
{
1936
    MOVFragment *frag = &c->fragment;
1937
    MOVTrackExt *trex = NULL;
1938
    int flags, track_id, i;
1939

    
1940
    avio_r8(pb); /* version */
1941
    flags = avio_rb24(pb);
1942

    
1943
    track_id = avio_rb32(pb);
1944
    if (!track_id)
1945
        return -1;
1946
    frag->track_id = track_id;
1947
    for (i = 0; i < c->trex_count; i++)
1948
        if (c->trex_data[i].track_id == frag->track_id) {
1949
            trex = &c->trex_data[i];
1950
            break;
1951
        }
1952
    if (!trex) {
1953
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1954
        return -1;
1955
    }
1956

    
1957
    if (flags & 0x01) frag->base_data_offset = avio_rb64(pb);
1958
    else              frag->base_data_offset = frag->moof_offset;
1959
    if (flags & 0x02) frag->stsd_id          = avio_rb32(pb);
1960
    else              frag->stsd_id          = trex->stsd_id;
1961

    
1962
    frag->duration = flags & 0x08 ? avio_rb32(pb) : trex->duration;
1963
    frag->size     = flags & 0x10 ? avio_rb32(pb) : trex->size;
1964
    frag->flags    = flags & 0x20 ? avio_rb32(pb) : trex->flags;
1965
    av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
1966
    return 0;
1967
}
1968

    
1969
static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1970
{
1971
    c->chapter_track = avio_rb32(pb);
1972
    return 0;
1973
}
1974

    
1975
static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1976
{
1977
    MOVTrackExt *trex;
1978

    
1979
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1980
        return -1;
1981
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1982
    if (!trex)
1983
        return AVERROR(ENOMEM);
1984
    c->trex_data = trex;
1985
    trex = &c->trex_data[c->trex_count++];
1986
    avio_r8(pb); /* version */
1987
    avio_rb24(pb); /* flags */
1988
    trex->track_id = avio_rb32(pb);
1989
    trex->stsd_id  = avio_rb32(pb);
1990
    trex->duration = avio_rb32(pb);
1991
    trex->size     = avio_rb32(pb);
1992
    trex->flags    = avio_rb32(pb);
1993
    return 0;
1994
}
1995

    
1996
static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1997
{
1998
    MOVFragment *frag = &c->fragment;
1999
    AVStream *st = NULL;
2000
    MOVStreamContext *sc;
2001
    uint64_t offset;
2002
    int64_t dts;
2003
    int data_offset = 0;
2004
    unsigned entries, first_sample_flags = frag->flags;
2005
    int flags, distance, i;
2006

    
2007
    for (i = 0; i < c->fc->nb_streams; i++) {
2008
        if (c->fc->streams[i]->id == frag->track_id) {
2009
            st = c->fc->streams[i];
2010
            break;
2011
        }
2012
    }
2013
    if (!st) {
2014
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2015
        return -1;
2016
    }
2017
    sc = st->priv_data;
2018
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
2019
        return 0;
2020
    avio_r8(pb); /* version */
2021
    flags = avio_rb24(pb);
2022
    entries = avio_rb32(pb);
2023
    av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2024
    if (flags & 0x001) data_offset        = avio_rb32(pb);
2025
    if (flags & 0x004) first_sample_flags = avio_rb32(pb);
2026
    if (flags & 0x800) {
2027
        MOVStts *ctts_data;
2028
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2029
            return -1;
2030
        ctts_data = av_realloc(sc->ctts_data,
2031
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2032
        if (!ctts_data)
2033
            return AVERROR(ENOMEM);
2034
        sc->ctts_data = ctts_data;
2035
    }
2036
    dts = st->duration;
2037
    offset = frag->base_data_offset + data_offset;
2038
    distance = 0;
2039
    av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2040
    for (i = 0; i < entries; i++) {
2041
        unsigned sample_size = frag->size;
2042
        int sample_flags = i ? frag->flags : first_sample_flags;
2043
        unsigned sample_duration = frag->duration;
2044
        int keyframe;
2045

    
2046
        if (flags & 0x100) sample_duration = avio_rb32(pb);
2047
        if (flags & 0x200) sample_size     = avio_rb32(pb);
2048
        if (flags & 0x400) sample_flags    = avio_rb32(pb);
2049
        if (flags & 0x800) {
2050
            sc->ctts_data[sc->ctts_count].count = 1;
2051
            sc->ctts_data[sc->ctts_count].duration = avio_rb32(pb);
2052
            sc->ctts_count++;
2053
        }
2054
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2055
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2056
            distance = 0;
2057
        av_add_index_entry(st, offset, dts, sample_size, distance,
2058
                           keyframe ? AVINDEX_KEYFRAME : 0);
2059
        av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2060
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2061
                offset, dts, sample_size, distance, keyframe);
2062
        distance++;
2063
        dts += sample_duration;
2064
        offset += sample_size;
2065
    }
2066
    frag->moof_offset = offset;
2067
    st->duration = dts;
2068
    return 0;
2069
}
2070

    
2071
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2072
/* like the files created with Adobe Premiere 5.0, for samples see */
2073
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2074
static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2075
{
2076
    int err;
2077

    
2078
    if (atom.size < 8)
2079
        return 0; /* continue */
2080
    if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2081
        url_fskip(pb, atom.size - 4);
2082
        return 0;
2083
    }
2084
    atom.type = avio_rl32(pb);
2085
    atom.size -= 8;
2086
    if (atom.type != MKTAG('m','d','a','t')) {
2087
        url_fskip(pb, atom.size);
2088
        return 0;
2089
    }
2090
    err = mov_read_mdat(c, pb, atom);
2091
    return err;
2092
}
2093

    
2094
static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2095
{
2096
#if CONFIG_ZLIB
2097
    AVIOContext ctx;
2098
    uint8_t *cmov_data;
2099
    uint8_t *moov_data; /* uncompressed data */
2100
    long cmov_len, moov_len;
2101
    int ret = -1;
2102

    
2103
    avio_rb32(pb); /* dcom atom */
2104
    if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2105
        return -1;
2106
    if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2107
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2108
        return -1;
2109
    }
2110
    avio_rb32(pb); /* cmvd atom */
2111
    if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2112
        return -1;
2113
    moov_len = avio_rb32(pb); /* uncompressed size */
2114
    cmov_len = atom.size - 6 * 4;
2115

    
2116
    cmov_data = av_malloc(cmov_len);
2117
    if (!cmov_data)
2118
        return AVERROR(ENOMEM);
2119
    moov_data = av_malloc(moov_len);
2120
    if (!moov_data) {
2121
        av_free(cmov_data);
2122
        return AVERROR(ENOMEM);
2123
    }
2124
    avio_read(pb, cmov_data, cmov_len);
2125
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2126
        goto free_and_return;
2127
    if(ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2128
        goto free_and_return;
2129
    atom.type = MKTAG('m','o','o','v');
2130
    atom.size = moov_len;
2131
#ifdef DEBUG
2132
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2133
#endif
2134
    ret = mov_read_default(c, &ctx, atom);
2135
free_and_return:
2136
    av_free(moov_data);
2137
    av_free(cmov_data);
2138
    return ret;
2139
#else
2140
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2141
    return -1;
2142
#endif
2143
}
2144

    
2145
/* edit list atom */
2146
static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2147
{
2148
    MOVStreamContext *sc;
2149
    int i, edit_count;
2150

    
2151
    if (c->fc->nb_streams < 1)
2152
        return 0;
2153
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2154

    
2155
    avio_r8(pb); /* version */
2156
    avio_rb24(pb); /* flags */
2157
    edit_count = avio_rb32(pb); /* entries */
2158

    
2159
    if((uint64_t)edit_count*12+8 > atom.size)
2160
        return -1;
2161

    
2162
    for(i=0; i<edit_count; i++){
2163
        int time;
2164
        int duration = avio_rb32(pb); /* Track duration */
2165
        time = avio_rb32(pb); /* Media time */
2166
        avio_rb32(pb); /* Media rate */
2167
        if (i == 0 && time >= -1) {
2168
            sc->time_offset = time != -1 ? time : -duration;
2169
        }
2170
    }
2171

    
2172
    if(edit_count > 1)
2173
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2174
               "a/v desync might occur, patch welcome\n");
2175

    
2176
    av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2177
    return 0;
2178
}
2179

    
2180
static const MOVParseTableEntry mov_default_parse_table[] = {
2181
{ MKTAG('a','v','s','s'), mov_read_extradata },
2182
{ MKTAG('c','h','p','l'), mov_read_chpl },
2183
{ MKTAG('c','o','6','4'), mov_read_stco },
2184
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2185
{ MKTAG('d','i','n','f'), mov_read_default },
2186
{ MKTAG('d','r','e','f'), mov_read_dref },
2187
{ MKTAG('e','d','t','s'), mov_read_default },
2188
{ MKTAG('e','l','s','t'), mov_read_elst },
2189
{ MKTAG('e','n','d','a'), mov_read_enda },
2190
{ MKTAG('f','i','e','l'), mov_read_extradata },
2191
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2192
{ MKTAG('g','l','b','l'), mov_read_glbl },
2193
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2194
{ MKTAG('i','l','s','t'), mov_read_ilst },
2195
{ MKTAG('j','p','2','h'), mov_read_extradata },
2196
{ MKTAG('m','d','a','t'), mov_read_mdat },
2197
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2198
{ MKTAG('m','d','i','a'), mov_read_default },
2199
{ MKTAG('m','e','t','a'), mov_read_meta },
2200
{ MKTAG('m','i','n','f'), mov_read_default },
2201
{ MKTAG('m','o','o','f'), mov_read_moof },
2202
{ MKTAG('m','o','o','v'), mov_read_moov },
2203
{ MKTAG('m','v','e','x'), mov_read_default },
2204
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2205
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2206
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2207
{ MKTAG('a','v','c','C'), mov_read_glbl },
2208
{ MKTAG('p','a','s','p'), mov_read_pasp },
2209
{ MKTAG('s','t','b','l'), mov_read_default },
2210
{ MKTAG('s','t','c','o'), mov_read_stco },
2211
{ MKTAG('s','t','p','s'), mov_read_stps },
2212
{ MKTAG('s','t','r','f'), mov_read_strf },
2213
{ MKTAG('s','t','s','c'), mov_read_stsc },
2214
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2215
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2216
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2217
{ MKTAG('s','t','t','s'), mov_read_stts },
2218
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2219
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2220
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2221
{ MKTAG('t','r','a','k'), mov_read_trak },
2222
{ MKTAG('t','r','a','f'), mov_read_default },
2223
{ MKTAG('t','r','e','f'), mov_read_default },
2224
{ MKTAG('c','h','a','p'), mov_read_chap },
2225
{ MKTAG('t','r','e','x'), mov_read_trex },
2226
{ MKTAG('t','r','u','n'), mov_read_trun },
2227
{ MKTAG('u','d','t','a'), mov_read_default },
2228
{ MKTAG('w','a','v','e'), mov_read_wave },
2229
{ MKTAG('e','s','d','s'), mov_read_esds },
2230
{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2231
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2232
{ MKTAG('c','m','o','v'), mov_read_cmov },
2233
{ 0, NULL }
2234
};
2235

    
2236
static int mov_probe(AVProbeData *p)
2237
{
2238
    unsigned int offset;
2239
    uint32_t tag;
2240
    int score = 0;
2241

    
2242
    /* check file header */
2243
    offset = 0;
2244
    for(;;) {
2245
        /* ignore invalid offset */
2246
        if ((offset + 8) > (unsigned int)p->buf_size)
2247
            return score;
2248
        tag = AV_RL32(p->buf + offset + 4);
2249
        switch(tag) {
2250
        /* check for obvious tags */
2251
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2252
        case MKTAG('m','o','o','v'):
2253
        case MKTAG('m','d','a','t'):
2254
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2255
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2256
        case MKTAG('f','t','y','p'):
2257
            return AVPROBE_SCORE_MAX;
2258
        /* those are more common words, so rate then a bit less */
2259
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2260
        case MKTAG('w','i','d','e'):
2261
        case MKTAG('f','r','e','e'):
2262
        case MKTAG('j','u','n','k'):
2263
        case MKTAG('p','i','c','t'):
2264
            return AVPROBE_SCORE_MAX - 5;
2265
        case MKTAG(0x82,0x82,0x7f,0x7d):
2266
        case MKTAG('s','k','i','p'):
2267
        case MKTAG('u','u','i','d'):
2268
        case MKTAG('p','r','f','l'):
2269
            offset = AV_RB32(p->buf+offset) + offset;
2270
            /* if we only find those cause probedata is too small at least rate them */
2271
            score = AVPROBE_SCORE_MAX - 50;
2272
            break;
2273
        default:
2274
            /* unrecognized tag */
2275
            return score;
2276
        }
2277
    }
2278
    return score;
2279
}
2280

    
2281
// must be done after parsing all trak because there's no order requirement
2282
static void mov_read_chapters(AVFormatContext *s)
2283
{
2284
    MOVContext *mov = s->priv_data;
2285
    AVStream *st = NULL;
2286
    MOVStreamContext *sc;
2287
    int64_t cur_pos;
2288
    int i;
2289

    
2290
    for (i = 0; i < s->nb_streams; i++)
2291
        if (s->streams[i]->id == mov->chapter_track) {
2292
            st = s->streams[i];
2293
            break;
2294
        }
2295
    if (!st) {
2296
        av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2297
        return;
2298
    }
2299

    
2300
    st->discard = AVDISCARD_ALL;
2301
    sc = st->priv_data;
2302
    cur_pos = url_ftell(sc->pb);
2303

    
2304
    for (i = 0; i < st->nb_index_entries; i++) {
2305
        AVIndexEntry *sample = &st->index_entries[i];
2306
        int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2307
        uint8_t *title;
2308
        uint16_t ch;
2309
        int len, title_len;
2310

    
2311
        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2312
            av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2313
            goto finish;
2314
        }
2315

    
2316
        // the first two bytes are the length of the title
2317
        len = avio_rb16(sc->pb);
2318
        if (len > sample->size-2)
2319
            continue;
2320
        title_len = 2*len + 1;
2321
        if (!(title = av_mallocz(title_len)))
2322
            goto finish;
2323

    
2324
        // The samples could theoretically be in any encoding if there's an encd
2325
        // atom following, but in practice are only utf-8 or utf-16, distinguished
2326
        // instead by the presence of a BOM
2327
        ch = avio_rb16(sc->pb);
2328
        if (ch == 0xfeff)
2329
            avio_get_str16be(sc->pb, len, title, title_len);
2330
        else if (ch == 0xfffe)
2331
            avio_get_str16le(sc->pb, len, title, title_len);
2332
        else {
2333
            AV_WB16(title, ch);
2334
            get_strz(sc->pb, title + 2, len - 1);
2335
        }
2336

    
2337
        ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2338
        av_freep(&title);
2339
    }
2340
finish:
2341
    avio_seek(sc->pb, cur_pos, SEEK_SET);
2342
}
2343

    
2344
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2345
{
2346
    MOVContext *mov = s->priv_data;
2347
    AVIOContext *pb = s->pb;
2348
    int err;
2349
    MOVAtom atom = { AV_RL32("root") };
2350

    
2351
    mov->fc = s;
2352
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2353
    if(!url_is_streamed(pb))
2354
        atom.size = url_fsize(pb);
2355
    else
2356
        atom.size = INT64_MAX;
2357

    
2358
    /* check MOV header */
2359
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2360
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2361
        return err;
2362
    }
2363
    if (!mov->found_moov) {
2364
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2365
        return -1;
2366
    }
2367
    av_dlog(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2368

    
2369
    if (!url_is_streamed(pb) && mov->chapter_track > 0)
2370
        mov_read_chapters(s);
2371

    
2372
    return 0;
2373
}
2374

    
2375
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2376
{
2377
    AVIndexEntry *sample = NULL;
2378
    int64_t best_dts = INT64_MAX;
2379
    int i;
2380
    for (i = 0; i < s->nb_streams; i++) {
2381
        AVStream *avst = s->streams[i];
2382
        MOVStreamContext *msc = avst->priv_data;
2383
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2384
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2385
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2386
            av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2387
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2388
                (!url_is_streamed(s->pb) &&
2389
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2390
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2391
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2392
                sample = current_sample;
2393
                best_dts = dts;
2394
                *st = avst;
2395
            }
2396
        }
2397
    }
2398
    return sample;
2399
}
2400

    
2401
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2402
{
2403
    MOVContext *mov = s->priv_data;
2404
    MOVStreamContext *sc;
2405
    AVIndexEntry *sample;
2406
    AVStream *st = NULL;
2407
    int ret;
2408
 retry:
2409
    sample = mov_find_next_sample(s, &st);
2410
    if (!sample) {
2411
        mov->found_mdat = 0;
2412
        if (!url_is_streamed(s->pb) ||
2413
            mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2414
            url_feof(s->pb))
2415
            return AVERROR_EOF;
2416
        av_dlog(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2417
        goto retry;
2418
    }
2419
    sc = st->priv_data;
2420
    /* must be done just before reading, to avoid infinite loop on sample */
2421
    sc->current_sample++;
2422

    
2423
    if (st->discard != AVDISCARD_ALL) {
2424
        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2425
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2426
                   sc->ffindex, sample->pos);
2427
            return -1;
2428
        }
2429
        ret = av_get_packet(sc->pb, pkt, sample->size);
2430
        if (ret < 0)
2431
            return ret;
2432
#if CONFIG_DV_DEMUXER
2433
        if (mov->dv_demux && sc->dv_audio_container) {
2434
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2435
            av_free(pkt->data);
2436
            pkt->size = 0;
2437
            ret = dv_get_packet(mov->dv_demux, pkt);
2438
            if (ret < 0)
2439
                return ret;
2440
        }
2441
#endif
2442
    }
2443

    
2444
    pkt->stream_index = sc->ffindex;
2445
    pkt->dts = sample->timestamp;
2446
    if (sc->ctts_data) {
2447
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2448
        /* update ctts context */
2449
        sc->ctts_sample++;
2450
        if (sc->ctts_index < sc->ctts_count &&
2451
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2452
            sc->ctts_index++;
2453
            sc->ctts_sample = 0;
2454
        }
2455
        if (sc->wrong_dts)
2456
            pkt->dts = AV_NOPTS_VALUE;
2457
    } else {
2458
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2459
            st->index_entries[sc->current_sample].timestamp : st->duration;
2460
        pkt->duration = next_dts - pkt->dts;
2461
        pkt->pts = pkt->dts;
2462
    }
2463
    if (st->discard == AVDISCARD_ALL)
2464
        goto retry;
2465
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2466
    pkt->pos = sample->pos;
2467
    av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2468
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2469
    return 0;
2470
}
2471

    
2472
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2473
{
2474
    MOVStreamContext *sc = st->priv_data;
2475
    int sample, time_sample;
2476
    int i;
2477

    
2478
    sample = av_index_search_timestamp(st, timestamp, flags);
2479
    av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2480
    if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2481
        sample = 0;
2482
    if (sample < 0) /* not sure what to do */
2483
        return -1;
2484
    sc->current_sample = sample;
2485
    av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2486
    /* adjust ctts index */
2487
    if (sc->ctts_data) {
2488
        time_sample = 0;
2489
        for (i = 0; i < sc->ctts_count; i++) {
2490
            int next = time_sample + sc->ctts_data[i].count;
2491
            if (next > sc->current_sample) {
2492
                sc->ctts_index = i;
2493
                sc->ctts_sample = sc->current_sample - time_sample;
2494
                break;
2495
            }
2496
            time_sample = next;
2497
        }
2498
    }
2499
    return sample;
2500
}
2501

    
2502
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2503
{
2504
    AVStream *st;
2505
    int64_t seek_timestamp, timestamp;
2506
    int sample;
2507
    int i;
2508

    
2509
    if (stream_index >= s->nb_streams)
2510
        return -1;
2511
    if (sample_time < 0)
2512
        sample_time = 0;
2513

    
2514
    st = s->streams[stream_index];
2515
    sample = mov_seek_stream(s, st, sample_time, flags);
2516
    if (sample < 0)
2517
        return -1;
2518

    
2519
    /* adjust seek timestamp to found sample timestamp */
2520
    seek_timestamp = st->index_entries[sample].timestamp;
2521

    
2522
    for (i = 0; i < s->nb_streams; i++) {
2523
        st = s->streams[i];
2524
        if (stream_index == i)
2525
            continue;
2526

    
2527
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2528
        mov_seek_stream(s, st, timestamp, flags);
2529
    }
2530
    return 0;
2531
}
2532

    
2533
static int mov_read_close(AVFormatContext *s)
2534
{
2535
    MOVContext *mov = s->priv_data;
2536
    int i, j;
2537

    
2538
    for (i = 0; i < s->nb_streams; i++) {
2539
        AVStream *st = s->streams[i];
2540
        MOVStreamContext *sc = st->priv_data;
2541

    
2542
        av_freep(&sc->ctts_data);
2543
        for (j = 0; j < sc->drefs_count; j++) {
2544
            av_freep(&sc->drefs[j].path);
2545
            av_freep(&sc->drefs[j].dir);
2546
        }
2547
        av_freep(&sc->drefs);
2548
        if (sc->pb && sc->pb != s->pb)
2549
            avio_close(sc->pb);
2550

    
2551
        av_freep(&st->codec->palctrl);
2552
    }
2553

    
2554
    if (mov->dv_demux) {
2555
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2556
            av_freep(&mov->dv_fctx->streams[i]->codec);
2557
            av_freep(&mov->dv_fctx->streams[i]);
2558
        }
2559
        av_freep(&mov->dv_fctx);
2560
        av_freep(&mov->dv_demux);
2561
    }
2562

    
2563
    av_freep(&mov->trex_data);
2564

    
2565
    return 0;
2566
}
2567

    
2568
AVInputFormat ff_mov_demuxer = {
2569
    "mov,mp4,m4a,3gp,3g2,mj2",
2570
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2571
    sizeof(MOVContext),
2572
    mov_probe,
2573
    mov_read_header,
2574
    mov_read_packet,
2575
    mov_read_close,
2576
    mov_read_seek,
2577
};