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ffmpeg / libavformat / mov.c @ 2d8d6882

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1
/*
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 * MOV demuxer
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 * Copyright (c) 2001 Fabrice Bellard
4
 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
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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"
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#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 :-)
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 *
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,
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    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
            avio_skip(pb, a.size);
300
        } else {
301
            int64_t start_pos = avio_tell(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
                (!pb->seekable || start_pos + a.size == avio_size(pb)))
308
                return 0;
309
            left = a.size - avio_tell(pb) + start_pos;
310
            if (left > 0) /* skip garbage at atom end */
311
                avio_skip(pb, left);
312
        }
313

    
314
        total_size += a.size;
315
    }
316

    
317
    if (total_size < atom.size && atom.size < 0x7ffff)
318
        avio_skip(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 = avio_tell(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
            avio_skip(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
            avio_skip(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
            avio_skip(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
            avio_skip(pb, 16);
385

    
386
            for (type = 0; type != -1 && avio_tell(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
                    avio_skip(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, bsmod;
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
    bsmod = (ac3info >> 14) & 0x7;
503
    acmod = (ac3info >> 11) & 0x7;
504
    lfeon = (ac3info >> 10) & 0x1;
505
    st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
506
    st->codec->audio_service_type = bsmod;
507
    if (st->codec->channels > 1 && bsmod == 0x7)
508
        st->codec->audio_service_type = AV_AUDIO_SERVICE_TYPE_KARAOKE;
509

    
510
    return 0;
511
}
512

    
513
static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
514
{
515
    const int num = avio_rb32(pb);
516
    const int den = avio_rb32(pb);
517
    AVStream *st;
518

    
519
    if (c->fc->nb_streams < 1)
520
        return 0;
521
    st = c->fc->streams[c->fc->nb_streams-1];
522

    
523
    if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
524
        (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
525
        av_log(c->fc, AV_LOG_WARNING,
526
               "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
527
               st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
528
               num, den);
529
    } else if (den != 0) {
530
        st->sample_aspect_ratio.num = num;
531
        st->sample_aspect_ratio.den = den;
532
    }
533
    return 0;
534
}
535

    
536
/* this atom contains actual media data */
537
static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom)
538
{
539
    if(atom.size == 0) /* wrong one (MP4) */
540
        return 0;
541
    c->found_mdat=1;
542
    return 0; /* now go for moov */
543
}
544

    
545
/* read major brand, minor version and compatible brands and store them as metadata */
546
static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
547
{
548
    uint32_t minor_ver;
549
    int comp_brand_size;
550
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
551
    char* comp_brands_str;
552
    uint8_t type[5] = {0};
553

    
554
    avio_read(pb, type, 4);
555
    if (strcmp(type, "qt  "))
556
        c->isom = 1;
557
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
558
    av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
559
    minor_ver = avio_rb32(pb); /* minor version */
560
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
561
    av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
562

    
563
    comp_brand_size = atom.size - 8;
564
    if (comp_brand_size < 0)
565
        return -1;
566
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
567
    if (!comp_brands_str)
568
        return AVERROR(ENOMEM);
569
    avio_read(pb, comp_brands_str, comp_brand_size);
570
    comp_brands_str[comp_brand_size] = 0;
571
    av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
572
    av_freep(&comp_brands_str);
573

    
574
    return 0;
575
}
576

    
577
/* this atom should contain all header atoms */
578
static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
579
{
580
    if (mov_read_default(c, pb, atom) < 0)
581
        return -1;
582
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
583
    /* so we don't parse the whole file if over a network */
584
    c->found_moov=1;
585
    return 0; /* now go for mdat */
586
}
587

    
588
static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom)
589
{
590
    c->fragment.moof_offset = avio_tell(pb) - 8;
591
    av_dlog(c->fc, "moof offset %"PRIx64"\n", c->fragment.moof_offset);
592
    return mov_read_default(c, pb, atom);
593
}
594

    
595
static void mov_metadata_creation_time(AVMetadata **metadata, time_t time)
596
{
597
    char buffer[32];
598
    if (time) {
599
        struct tm *ptm;
600
        time -= 2082844800;  /* seconds between 1904-01-01 and Epoch */
601
        ptm = gmtime(&time);
602
        if (!ptm) return;
603
        strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
604
        av_metadata_set2(metadata, "creation_time", buffer, 0);
605
    }
606
}
607

    
608
static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
609
{
610
    AVStream *st;
611
    MOVStreamContext *sc;
612
    int version;
613
    char language[4] = {0};
614
    unsigned lang;
615
    time_t creation_time;
616

    
617
    if (c->fc->nb_streams < 1)
618
        return 0;
619
    st = c->fc->streams[c->fc->nb_streams-1];
620
    sc = st->priv_data;
621

    
622
    version = avio_r8(pb);
623
    if (version > 1)
624
        return -1; /* unsupported */
625

    
626
    avio_rb24(pb); /* flags */
627
    if (version == 1) {
628
        creation_time = avio_rb64(pb);
629
        avio_rb64(pb);
630
    } else {
631
        creation_time = avio_rb32(pb);
632
        avio_rb32(pb); /* modification time */
633
    }
634
    mov_metadata_creation_time(&st->metadata, creation_time);
635

    
636
    sc->time_scale = avio_rb32(pb);
637
    st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
638

    
639
    lang = avio_rb16(pb); /* language */
640
    if (ff_mov_lang_to_iso639(lang, language))
641
        av_metadata_set2(&st->metadata, "language", language, 0);
642
    avio_rb16(pb); /* quality */
643

    
644
    return 0;
645
}
646

    
647
static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
648
{
649
    time_t creation_time;
650
    int version = avio_r8(pb); /* version */
651
    avio_rb24(pb); /* flags */
652

    
653
    if (version == 1) {
654
        creation_time = avio_rb64(pb);
655
        avio_rb64(pb);
656
    } else {
657
        creation_time = avio_rb32(pb);
658
        avio_rb32(pb); /* modification time */
659
    }
660
    mov_metadata_creation_time(&c->fc->metadata, creation_time);
661
    c->time_scale = avio_rb32(pb); /* time scale */
662

    
663
    av_dlog(c->fc, "time scale = %i\n", c->time_scale);
664

    
665
    c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
666
    avio_rb32(pb); /* preferred scale */
667

    
668
    avio_rb16(pb); /* preferred volume */
669

    
670
    avio_skip(pb, 10); /* reserved */
671

    
672
    avio_skip(pb, 36); /* display matrix */
673

    
674
    avio_rb32(pb); /* preview time */
675
    avio_rb32(pb); /* preview duration */
676
    avio_rb32(pb); /* poster time */
677
    avio_rb32(pb); /* selection time */
678
    avio_rb32(pb); /* selection duration */
679
    avio_rb32(pb); /* current time */
680
    avio_rb32(pb); /* next track ID */
681

    
682
    return 0;
683
}
684

    
685
static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom)
686
{
687
    AVStream *st;
688

    
689
    if (c->fc->nb_streams < 1)
690
        return 0;
691
    st = c->fc->streams[c->fc->nb_streams-1];
692

    
693
    if((uint64_t)atom.size > (1<<30))
694
        return -1;
695

    
696
    // currently SVQ3 decoder expect full STSD header - so let's fake it
697
    // this should be fixed and just SMI header should be passed
698
    av_free(st->codec->extradata);
699
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
700
    if (!st->codec->extradata)
701
        return AVERROR(ENOMEM);
702
    st->codec->extradata_size = 0x5a + atom.size;
703
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
704
    avio_read(pb, st->codec->extradata + 0x5a, atom.size);
705
    av_dlog(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
706
    return 0;
707
}
708

    
709
static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom)
710
{
711
    AVStream *st;
712
    int little_endian;
713

    
714
    if (c->fc->nb_streams < 1)
715
        return 0;
716
    st = c->fc->streams[c->fc->nb_streams-1];
717

    
718
    little_endian = avio_rb16(pb);
719
    av_dlog(c->fc, "enda %d\n", little_endian);
720
    if (little_endian == 1) {
721
        switch (st->codec->codec_id) {
722
        case CODEC_ID_PCM_S24BE:
723
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
724
            break;
725
        case CODEC_ID_PCM_S32BE:
726
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
727
            break;
728
        case CODEC_ID_PCM_F32BE:
729
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
730
            break;
731
        case CODEC_ID_PCM_F64BE:
732
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
733
            break;
734
        default:
735
            break;
736
        }
737
    }
738
    return 0;
739
}
740

    
741
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
742
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
743
{
744
    AVStream *st;
745
    uint64_t size;
746
    uint8_t *buf;
747

    
748
    if (c->fc->nb_streams < 1) // will happen with jp2 files
749
        return 0;
750
    st= c->fc->streams[c->fc->nb_streams-1];
751
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
752
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
753
        return -1;
754
    buf= av_realloc(st->codec->extradata, size);
755
    if(!buf)
756
        return -1;
757
    st->codec->extradata= buf;
758
    buf+= st->codec->extradata_size;
759
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
760
    AV_WB32(       buf    , atom.size + 8);
761
    AV_WL32(       buf + 4, atom.type);
762
    avio_read(pb, buf + 8, atom.size);
763
    return 0;
764
}
765

    
766
static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom)
767
{
768
    AVStream *st;
769

    
770
    if (c->fc->nb_streams < 1)
771
        return 0;
772
    st = c->fc->streams[c->fc->nb_streams-1];
773

    
774
    if((uint64_t)atom.size > (1<<30))
775
        return -1;
776

    
777
    if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
778
        // pass all frma atom to codec, needed at least for QDMC and QDM2
779
        av_free(st->codec->extradata);
780
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
781
        if (!st->codec->extradata)
782
            return AVERROR(ENOMEM);
783
        st->codec->extradata_size = atom.size;
784
        avio_read(pb, st->codec->extradata, atom.size);
785
    } else if (atom.size > 8) { /* to read frma, esds atoms */
786
        if (mov_read_default(c, pb, atom) < 0)
787
            return -1;
788
    } else
789
        avio_skip(pb, atom.size);
790
    return 0;
791
}
792

    
793
/**
794
 * This function reads atom content and puts data in extradata without tag
795
 * nor size unlike mov_read_extradata.
796
 */
797
static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
798
{
799
    AVStream *st;
800

    
801
    if (c->fc->nb_streams < 1)
802
        return 0;
803
    st = c->fc->streams[c->fc->nb_streams-1];
804

    
805
    if((uint64_t)atom.size > (1<<30))
806
        return -1;
807

    
808
    av_free(st->codec->extradata);
809
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
810
    if (!st->codec->extradata)
811
        return AVERROR(ENOMEM);
812
    st->codec->extradata_size = atom.size;
813
    avio_read(pb, st->codec->extradata, atom.size);
814
    return 0;
815
}
816

    
817
/**
818
 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
819
 * but can have extradata appended at the end after the 40 bytes belonging
820
 * to the struct.
821
 */
822
static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom)
823
{
824
    AVStream *st;
825

    
826
    if (c->fc->nb_streams < 1)
827
        return 0;
828
    if (atom.size <= 40)
829
        return 0;
830
    st = c->fc->streams[c->fc->nb_streams-1];
831

    
832
    if((uint64_t)atom.size > (1<<30))
833
        return -1;
834

    
835
    av_free(st->codec->extradata);
836
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
837
    if (!st->codec->extradata)
838
        return AVERROR(ENOMEM);
839
    st->codec->extradata_size = atom.size - 40;
840
    avio_skip(pb, 40);
841
    avio_read(pb, st->codec->extradata, atom.size - 40);
842
    return 0;
843
}
844

    
845
static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom)
846
{
847
    AVStream *st;
848
    MOVStreamContext *sc;
849
    unsigned int i, entries;
850

    
851
    if (c->fc->nb_streams < 1)
852
        return 0;
853
    st = c->fc->streams[c->fc->nb_streams-1];
854
    sc = st->priv_data;
855

    
856
    avio_r8(pb); /* version */
857
    avio_rb24(pb); /* flags */
858

    
859
    entries = avio_rb32(pb);
860

    
861
    if(entries >= UINT_MAX/sizeof(int64_t))
862
        return -1;
863

    
864
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
865
    if (!sc->chunk_offsets)
866
        return AVERROR(ENOMEM);
867
    sc->chunk_count = entries;
868

    
869
    if      (atom.type == MKTAG('s','t','c','o'))
870
        for(i=0; i<entries; i++)
871
            sc->chunk_offsets[i] = avio_rb32(pb);
872
    else if (atom.type == MKTAG('c','o','6','4'))
873
        for(i=0; i<entries; i++)
874
            sc->chunk_offsets[i] = avio_rb64(pb);
875
    else
876
        return -1;
877

    
878
    return 0;
879
}
880

    
881
/**
882
 * Compute codec id for 'lpcm' tag.
883
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
884
 */
885
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
886
{
887
    if (flags & 1) { // floating point
888
        if (flags & 2) { // big endian
889
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
890
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
891
        } else {
892
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
893
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
894
        }
895
    } else {
896
        if (flags & 2) {
897
            if      (bps == 8)
898
                // signed integer
899
                if (flags & 4)  return CODEC_ID_PCM_S8;
900
                else            return CODEC_ID_PCM_U8;
901
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
902
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
903
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
904
        } else {
905
            if      (bps == 8)
906
                if (flags & 4)  return CODEC_ID_PCM_S8;
907
                else            return CODEC_ID_PCM_U8;
908
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
909
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
910
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
911
        }
912
    }
913
    return CODEC_ID_NONE;
914
}
915

    
916
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries)
917
{
918
    AVStream *st;
919
    MOVStreamContext *sc;
920
    int j, pseudo_stream_id;
921

    
922
    if (c->fc->nb_streams < 1)
923
        return 0;
924
    st = c->fc->streams[c->fc->nb_streams-1];
925
    sc = st->priv_data;
926

    
927
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
928
        //Parsing Sample description table
929
        enum CodecID id;
930
        int dref_id = 1;
931
        MOVAtom a = { AV_RL32("stsd") };
932
        int64_t start_pos = avio_tell(pb);
933
        int size = avio_rb32(pb); /* size */
934
        uint32_t format = avio_rl32(pb); /* data format */
935

    
936
        if (size >= 16) {
937
            avio_rb32(pb); /* reserved */
938
            avio_rb16(pb); /* reserved */
939
            dref_id = avio_rb16(pb);
940
        }
941

    
942
        if (st->codec->codec_tag &&
943
            st->codec->codec_tag != format &&
944
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
945
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
946
           ){
947
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
948
             * export it as a separate AVStream but this needs a few changes
949
             * in the MOV demuxer, patch welcome. */
950
        multiple_stsd:
951
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
952
            avio_skip(pb, size - (avio_tell(pb) - start_pos));
953
            continue;
954
        }
955
        /* we cannot demux concatenated h264 streams because of different extradata */
956
        if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
957
            goto multiple_stsd;
958
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
959
        sc->dref_id= dref_id;
960

    
961
        st->codec->codec_tag = format;
962
        id = ff_codec_get_id(codec_movaudio_tags, format);
963
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
964
            id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
965

    
966
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
967
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
968
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
969
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
970
            id = ff_codec_get_id(codec_movvideo_tags, format);
971
            if (id <= 0)
972
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
973
            if (id > 0)
974
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
975
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
976
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
977
                if(id > 0)
978
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
979
            }
980
        }
981

    
982
        av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
983
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
984
                (format >> 24) & 0xff, st->codec->codec_type);
985

    
986
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
987
            unsigned int color_depth, len;
988
            int color_greyscale;
989

    
990
            st->codec->codec_id = id;
991
            avio_rb16(pb); /* version */
992
            avio_rb16(pb); /* revision level */
993
            avio_rb32(pb); /* vendor */
994
            avio_rb32(pb); /* temporal quality */
995
            avio_rb32(pb); /* spatial quality */
996

    
997
            st->codec->width = avio_rb16(pb); /* width */
998
            st->codec->height = avio_rb16(pb); /* height */
999

    
1000
            avio_rb32(pb); /* horiz resolution */
1001
            avio_rb32(pb); /* vert resolution */
1002
            avio_rb32(pb); /* data size, always 0 */
1003
            avio_rb16(pb); /* frames per samples */
1004

    
1005
            len = avio_r8(pb); /* codec name, pascal string */
1006
            if (len > 31)
1007
                len = 31;
1008
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1009
            if (len < 31)
1010
                avio_skip(pb, 31 - len);
1011
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
1012
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1013
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1014

    
1015
            st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
1016
            st->codec->color_table_id = avio_rb16(pb); /* colortable id */
1017
            av_dlog(c->fc, "depth %d, ctab id %d\n",
1018
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
1019
            /* figure out the palette situation */
1020
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
1021
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1022

    
1023
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
1024
            if ((color_depth == 2) || (color_depth == 4) ||
1025
                (color_depth == 8)) {
1026
                /* for palette traversal */
1027
                unsigned int color_start, color_count, color_end;
1028
                unsigned char r, g, b;
1029

    
1030
                if (color_greyscale) {
1031
                    int color_index, color_dec;
1032
                    /* compute the greyscale palette */
1033
                    st->codec->bits_per_coded_sample = color_depth;
1034
                    color_count = 1 << color_depth;
1035
                    color_index = 255;
1036
                    color_dec = 256 / (color_count - 1);
1037
                    for (j = 0; j < color_count; j++) {
1038
                        r = g = b = color_index;
1039
                        sc->palette[j] =
1040
                            (r << 16) | (g << 8) | (b);
1041
                        color_index -= color_dec;
1042
                        if (color_index < 0)
1043
                            color_index = 0;
1044
                    }
1045
                } else if (st->codec->color_table_id) {
1046
                    const uint8_t *color_table;
1047
                    /* if flag bit 3 is set, use the default palette */
1048
                    color_count = 1 << color_depth;
1049
                    if (color_depth == 2)
1050
                        color_table = ff_qt_default_palette_4;
1051
                    else if (color_depth == 4)
1052
                        color_table = ff_qt_default_palette_16;
1053
                    else
1054
                        color_table = ff_qt_default_palette_256;
1055

    
1056
                    for (j = 0; j < color_count; j++) {
1057
                        r = color_table[j * 3 + 0];
1058
                        g = color_table[j * 3 + 1];
1059
                        b = color_table[j * 3 + 2];
1060
                        sc->palette[j] =
1061
                            (r << 16) | (g << 8) | (b);
1062
                    }
1063
                } else {
1064
                    /* load the palette from the file */
1065
                    color_start = avio_rb32(pb);
1066
                    color_count = avio_rb16(pb);
1067
                    color_end = avio_rb16(pb);
1068
                    if ((color_start <= 255) &&
1069
                        (color_end <= 255)) {
1070
                        for (j = color_start; j <= color_end; j++) {
1071
                            /* each R, G, or B component is 16 bits;
1072
                             * only use the top 8 bits; skip alpha bytes
1073
                             * up front */
1074
                            avio_r8(pb);
1075
                            avio_r8(pb);
1076
                            r = avio_r8(pb);
1077
                            avio_r8(pb);
1078
                            g = avio_r8(pb);
1079
                            avio_r8(pb);
1080
                            b = avio_r8(pb);
1081
                            avio_r8(pb);
1082
                            sc->palette[j] =
1083
                                (r << 16) | (g << 8) | (b);
1084
                        }
1085
                    }
1086
                }
1087
                sc->has_palette = 1;
1088
            }
1089
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1090
            int bits_per_sample, flags;
1091
            uint16_t version = avio_rb16(pb);
1092

    
1093
            st->codec->codec_id = id;
1094
            avio_rb16(pb); /* revision level */
1095
            avio_rb32(pb); /* vendor */
1096

    
1097
            st->codec->channels = avio_rb16(pb);             /* channel count */
1098
            av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
1099
            st->codec->bits_per_coded_sample = avio_rb16(pb);      /* sample size */
1100

    
1101
            sc->audio_cid = avio_rb16(pb);
1102
            avio_rb16(pb); /* packet size = 0 */
1103

    
1104
            st->codec->sample_rate = ((avio_rb32(pb) >> 16));
1105

    
1106
            //Read QT version 1 fields. In version 0 these do not exist.
1107
            av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
1108
            if(!c->isom) {
1109
                if(version==1) {
1110
                    sc->samples_per_frame = avio_rb32(pb);
1111
                    avio_rb32(pb); /* bytes per packet */
1112
                    sc->bytes_per_frame = avio_rb32(pb);
1113
                    avio_rb32(pb); /* bytes per sample */
1114
                } else if(version==2) {
1115
                    avio_rb32(pb); /* sizeof struct only */
1116
                    st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */
1117
                    st->codec->channels = avio_rb32(pb);
1118
                    avio_rb32(pb); /* always 0x7F000000 */
1119
                    st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
1120
                    flags = avio_rb32(pb); /* lpcm format specific flag */
1121
                    sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
1122
                    sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
1123
                    if (format == MKTAG('l','p','c','m'))
1124
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1125
                }
1126
            }
1127

    
1128
            switch (st->codec->codec_id) {
1129
            case CODEC_ID_PCM_S8:
1130
            case CODEC_ID_PCM_U8:
1131
                if (st->codec->bits_per_coded_sample == 16)
1132
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1133
                break;
1134
            case CODEC_ID_PCM_S16LE:
1135
            case CODEC_ID_PCM_S16BE:
1136
                if (st->codec->bits_per_coded_sample == 8)
1137
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1138
                else if (st->codec->bits_per_coded_sample == 24)
1139
                    st->codec->codec_id =
1140
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1141
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1142
                break;
1143
            /* set values for old format before stsd version 1 appeared */
1144
            case CODEC_ID_MACE3:
1145
                sc->samples_per_frame = 6;
1146
                sc->bytes_per_frame = 2*st->codec->channels;
1147
                break;
1148
            case CODEC_ID_MACE6:
1149
                sc->samples_per_frame = 6;
1150
                sc->bytes_per_frame = 1*st->codec->channels;
1151
                break;
1152
            case CODEC_ID_ADPCM_IMA_QT:
1153
                sc->samples_per_frame = 64;
1154
                sc->bytes_per_frame = 34*st->codec->channels;
1155
                break;
1156
            case CODEC_ID_GSM:
1157
                sc->samples_per_frame = 160;
1158
                sc->bytes_per_frame = 33;
1159
                break;
1160
            default:
1161
                break;
1162
            }
1163

    
1164
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1165
            if (bits_per_sample) {
1166
                st->codec->bits_per_coded_sample = bits_per_sample;
1167
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1168
            }
1169
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1170
            // ttxt stsd contains display flags, justification, background
1171
            // color, fonts, and default styles, so fake an atom to read it
1172
            MOVAtom fake_atom = { .size = size - (avio_tell(pb) - start_pos) };
1173
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1174
                mov_read_glbl(c, pb, fake_atom);
1175
            st->codec->codec_id= id;
1176
            st->codec->width = sc->width;
1177
            st->codec->height = sc->height;
1178
        } else {
1179
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1180
            avio_skip(pb, size - (avio_tell(pb) - start_pos));
1181
        }
1182
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1183
        a.size = size - (avio_tell(pb) - start_pos);
1184
        if (a.size > 8) {
1185
            if (mov_read_default(c, pb, a) < 0)
1186
                return -1;
1187
        } else if (a.size > 0)
1188
            avio_skip(pb, a.size);
1189
    }
1190

    
1191
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1192
        st->codec->sample_rate= sc->time_scale;
1193

    
1194
    /* special codec parameters handling */
1195
    switch (st->codec->codec_id) {
1196
#if CONFIG_DV_DEMUXER
1197
    case CODEC_ID_DVAUDIO:
1198
        c->dv_fctx = avformat_alloc_context();
1199
        c->dv_demux = dv_init_demux(c->dv_fctx);
1200
        if (!c->dv_demux) {
1201
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1202
            return -1;
1203
        }
1204
        sc->dv_audio_container = 1;
1205
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1206
        break;
1207
#endif
1208
    /* no ifdef since parameters are always those */
1209
    case CODEC_ID_QCELP:
1210
        // force sample rate for qcelp when not stored in mov
1211
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1212
            st->codec->sample_rate = 8000;
1213
        st->codec->frame_size= 160;
1214
        st->codec->channels= 1; /* really needed */
1215
        break;
1216
    case CODEC_ID_AMR_NB:
1217
    case CODEC_ID_AMR_WB:
1218
        st->codec->frame_size= sc->samples_per_frame;
1219
        st->codec->channels= 1; /* really needed */
1220
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1221
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1222
            st->codec->sample_rate = 8000;
1223
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1224
            st->codec->sample_rate = 16000;
1225
        break;
1226
    case CODEC_ID_MP2:
1227
    case CODEC_ID_MP3:
1228
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1229
        st->need_parsing = AVSTREAM_PARSE_FULL;
1230
        break;
1231
    case CODEC_ID_GSM:
1232
    case CODEC_ID_ADPCM_MS:
1233
    case CODEC_ID_ADPCM_IMA_WAV:
1234
        st->codec->frame_size = sc->samples_per_frame;
1235
        st->codec->block_align = sc->bytes_per_frame;
1236
        break;
1237
    case CODEC_ID_ALAC:
1238
        if (st->codec->extradata_size == 36) {
1239
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1240
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1241
            st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1242
        }
1243
        break;
1244
    default:
1245
        break;
1246
    }
1247

    
1248
    return 0;
1249
}
1250

    
1251
static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1252
{
1253
    int entries;
1254

    
1255
    avio_r8(pb); /* version */
1256
    avio_rb24(pb); /* flags */
1257
    entries = avio_rb32(pb);
1258

    
1259
    return ff_mov_read_stsd_entries(c, pb, entries);
1260
}
1261

    
1262
static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1263
{
1264
    AVStream *st;
1265
    MOVStreamContext *sc;
1266
    unsigned int i, entries;
1267

    
1268
    if (c->fc->nb_streams < 1)
1269
        return 0;
1270
    st = c->fc->streams[c->fc->nb_streams-1];
1271
    sc = st->priv_data;
1272

    
1273
    avio_r8(pb); /* version */
1274
    avio_rb24(pb); /* flags */
1275

    
1276
    entries = avio_rb32(pb);
1277

    
1278
    av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1279

    
1280
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1281
        return -1;
1282
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1283
    if (!sc->stsc_data)
1284
        return AVERROR(ENOMEM);
1285
    sc->stsc_count = entries;
1286

    
1287
    for(i=0; i<entries; i++) {
1288
        sc->stsc_data[i].first = avio_rb32(pb);
1289
        sc->stsc_data[i].count = avio_rb32(pb);
1290
        sc->stsc_data[i].id = avio_rb32(pb);
1291
    }
1292
    return 0;
1293
}
1294

    
1295
static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1296
{
1297
    AVStream *st;
1298
    MOVStreamContext *sc;
1299
    unsigned i, entries;
1300

    
1301
    if (c->fc->nb_streams < 1)
1302
        return 0;
1303
    st = c->fc->streams[c->fc->nb_streams-1];
1304
    sc = st->priv_data;
1305

    
1306
    avio_rb32(pb); // version + flags
1307

    
1308
    entries = avio_rb32(pb);
1309
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1310
        return -1;
1311
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1312
    if (!sc->stps_data)
1313
        return AVERROR(ENOMEM);
1314
    sc->stps_count = entries;
1315

    
1316
    for (i = 0; i < entries; i++) {
1317
        sc->stps_data[i] = avio_rb32(pb);
1318
        //av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
1319
    }
1320

    
1321
    return 0;
1322
}
1323

    
1324
static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1325
{
1326
    AVStream *st;
1327
    MOVStreamContext *sc;
1328
    unsigned int i, entries;
1329

    
1330
    if (c->fc->nb_streams < 1)
1331
        return 0;
1332
    st = c->fc->streams[c->fc->nb_streams-1];
1333
    sc = st->priv_data;
1334

    
1335
    avio_r8(pb); /* version */
1336
    avio_rb24(pb); /* flags */
1337

    
1338
    entries = avio_rb32(pb);
1339

    
1340
    av_dlog(c->fc, "keyframe_count = %d\n", entries);
1341

    
1342
    if(entries >= UINT_MAX / sizeof(int))
1343
        return -1;
1344
    sc->keyframes = av_malloc(entries * sizeof(int));
1345
    if (!sc->keyframes)
1346
        return AVERROR(ENOMEM);
1347
    sc->keyframe_count = entries;
1348

    
1349
    for(i=0; i<entries; i++) {
1350
        sc->keyframes[i] = avio_rb32(pb);
1351
        //av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1352
    }
1353
    return 0;
1354
}
1355

    
1356
static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1357
{
1358
    AVStream *st;
1359
    MOVStreamContext *sc;
1360
    unsigned int i, entries, sample_size, field_size, num_bytes;
1361
    GetBitContext gb;
1362
    unsigned char* buf;
1363

    
1364
    if (c->fc->nb_streams < 1)
1365
        return 0;
1366
    st = c->fc->streams[c->fc->nb_streams-1];
1367
    sc = st->priv_data;
1368

    
1369
    avio_r8(pb); /* version */
1370
    avio_rb24(pb); /* flags */
1371

    
1372
    if (atom.type == MKTAG('s','t','s','z')) {
1373
        sample_size = avio_rb32(pb);
1374
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1375
            sc->sample_size = sample_size;
1376
        field_size = 32;
1377
    } else {
1378
        sample_size = 0;
1379
        avio_rb24(pb); /* reserved */
1380
        field_size = avio_r8(pb);
1381
    }
1382
    entries = avio_rb32(pb);
1383

    
1384
    av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1385

    
1386
    sc->sample_count = entries;
1387
    if (sample_size)
1388
        return 0;
1389

    
1390
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1391
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1392
        return -1;
1393
    }
1394

    
1395
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1396
        return -1;
1397
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1398
    if (!sc->sample_sizes)
1399
        return AVERROR(ENOMEM);
1400

    
1401
    num_bytes = (entries*field_size+4)>>3;
1402

    
1403
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1404
    if (!buf) {
1405
        av_freep(&sc->sample_sizes);
1406
        return AVERROR(ENOMEM);
1407
    }
1408

    
1409
    if (avio_read(pb, buf, num_bytes) < num_bytes) {
1410
        av_freep(&sc->sample_sizes);
1411
        av_free(buf);
1412
        return -1;
1413
    }
1414

    
1415
    init_get_bits(&gb, buf, 8*num_bytes);
1416

    
1417
    for(i=0; i<entries; i++)
1418
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1419

    
1420
    av_free(buf);
1421
    return 0;
1422
}
1423

    
1424
static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1425
{
1426
    AVStream *st;
1427
    MOVStreamContext *sc;
1428
    unsigned int i, entries;
1429
    int64_t duration=0;
1430
    int64_t total_sample_count=0;
1431

    
1432
    if (c->fc->nb_streams < 1)
1433
        return 0;
1434
    st = c->fc->streams[c->fc->nb_streams-1];
1435
    sc = st->priv_data;
1436

    
1437
    avio_r8(pb); /* version */
1438
    avio_rb24(pb); /* flags */
1439
    entries = avio_rb32(pb);
1440

    
1441
    av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1442

    
1443
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1444
        return -1;
1445
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1446
    if (!sc->stts_data)
1447
        return AVERROR(ENOMEM);
1448
    sc->stts_count = entries;
1449

    
1450
    for(i=0; i<entries; i++) {
1451
        int sample_duration;
1452
        int sample_count;
1453

    
1454
        sample_count=avio_rb32(pb);
1455
        sample_duration = avio_rb32(pb);
1456
        sc->stts_data[i].count= sample_count;
1457
        sc->stts_data[i].duration= sample_duration;
1458

    
1459
        av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1460

    
1461
        duration+=(int64_t)sample_duration*sample_count;
1462
        total_sample_count+=sample_count;
1463
    }
1464

    
1465
    st->nb_frames= total_sample_count;
1466
    if(duration)
1467
        st->duration= duration;
1468
    return 0;
1469
}
1470

    
1471
static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1472
{
1473
    AVStream *st;
1474
    MOVStreamContext *sc;
1475
    unsigned int i, entries;
1476

    
1477
    if (c->fc->nb_streams < 1)
1478
        return 0;
1479
    st = c->fc->streams[c->fc->nb_streams-1];
1480
    sc = st->priv_data;
1481

    
1482
    avio_r8(pb); /* version */
1483
    avio_rb24(pb); /* flags */
1484
    entries = avio_rb32(pb);
1485

    
1486
    av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1487

    
1488
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1489
        return -1;
1490
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1491
    if (!sc->ctts_data)
1492
        return AVERROR(ENOMEM);
1493
    sc->ctts_count = entries;
1494

    
1495
    for(i=0; i<entries; i++) {
1496
        int count    =avio_rb32(pb);
1497
        int duration =avio_rb32(pb);
1498

    
1499
        sc->ctts_data[i].count   = count;
1500
        sc->ctts_data[i].duration= duration;
1501
        if (duration < 0 && i+1<entries)
1502
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1503
    }
1504

    
1505
    av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
1506

    
1507
    return 0;
1508
}
1509

    
1510
static void mov_build_index(MOVContext *mov, AVStream *st)
1511
{
1512
    MOVStreamContext *sc = st->priv_data;
1513
    int64_t current_offset;
1514
    int64_t current_dts = 0;
1515
    unsigned int stts_index = 0;
1516
    unsigned int stsc_index = 0;
1517
    unsigned int stss_index = 0;
1518
    unsigned int stps_index = 0;
1519
    unsigned int i, j;
1520
    uint64_t stream_size = 0;
1521

    
1522
    /* adjust first dts according to edit list */
1523
    if (sc->time_offset && mov->time_scale > 0) {
1524
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1525
        current_dts = -rescaled;
1526
        if (sc->ctts_data && sc->stts_data &&
1527
            sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1528
            /* more than 16 frames delay, dts are likely wrong
1529
               this happens with files created by iMovie */
1530
            sc->wrong_dts = 1;
1531
            st->codec->has_b_frames = 1;
1532
        }
1533
    }
1534

    
1535
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1536
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1537
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1538
        unsigned int current_sample = 0;
1539
        unsigned int stts_sample = 0;
1540
        unsigned int sample_size;
1541
        unsigned int distance = 0;
1542
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1543

    
1544
        current_dts -= sc->dts_shift;
1545

    
1546
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1547
            return;
1548
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1549
        if (!st->index_entries)
1550
            return;
1551
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1552

    
1553
        for (i = 0; i < sc->chunk_count; i++) {
1554
            current_offset = sc->chunk_offsets[i];
1555
            while (stsc_index + 1 < sc->stsc_count &&
1556
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1557
                stsc_index++;
1558
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1559
                int keyframe = 0;
1560
                if (current_sample >= sc->sample_count) {
1561
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1562
                    return;
1563
                }
1564

    
1565
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1566
                    keyframe = 1;
1567
                    if (stss_index + 1 < sc->keyframe_count)
1568
                        stss_index++;
1569
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1570
                    keyframe = 1;
1571
                    if (stps_index + 1 < sc->stps_count)
1572
                        stps_index++;
1573
                }
1574
                if (keyframe)
1575
                    distance = 0;
1576
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1577
                if(sc->pseudo_stream_id == -1 ||
1578
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1579
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1580
                    e->pos = current_offset;
1581
                    e->timestamp = current_dts;
1582
                    e->size = sample_size;
1583
                    e->min_distance = distance;
1584
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1585
                    av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1586
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1587
                            current_offset, current_dts, sample_size, distance, keyframe);
1588
                }
1589

    
1590
                current_offset += sample_size;
1591
                stream_size += sample_size;
1592
                current_dts += sc->stts_data[stts_index].duration;
1593
                distance++;
1594
                stts_sample++;
1595
                current_sample++;
1596
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1597
                    stts_sample = 0;
1598
                    stts_index++;
1599
                }
1600
            }
1601
        }
1602
        if (st->duration > 0)
1603
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1604
    } else {
1605
        unsigned chunk_samples, total = 0;
1606

    
1607
        // compute total chunk count
1608
        for (i = 0; i < sc->stsc_count; i++) {
1609
            unsigned count, chunk_count;
1610

    
1611
            chunk_samples = sc->stsc_data[i].count;
1612
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1613
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1614
                return;
1615
            }
1616

    
1617
            if (sc->samples_per_frame >= 160) { // gsm
1618
                count = chunk_samples / sc->samples_per_frame;
1619
            } else if (sc->samples_per_frame > 1) {
1620
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1621
                count = (chunk_samples+samples-1) / samples;
1622
            } else {
1623
                count = (chunk_samples+1023) / 1024;
1624
            }
1625

    
1626
            if (i < sc->stsc_count - 1)
1627
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1628
            else
1629
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1630
            total += chunk_count * count;
1631
        }
1632

    
1633
        av_dlog(mov->fc, "chunk count %d\n", total);
1634
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1635
            return;
1636
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1637
        if (!st->index_entries)
1638
            return;
1639
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1640

    
1641
        // populate index
1642
        for (i = 0; i < sc->chunk_count; i++) {
1643
            current_offset = sc->chunk_offsets[i];
1644
            if (stsc_index + 1 < sc->stsc_count &&
1645
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1646
                stsc_index++;
1647
            chunk_samples = sc->stsc_data[stsc_index].count;
1648

    
1649
            while (chunk_samples > 0) {
1650
                AVIndexEntry *e;
1651
                unsigned size, samples;
1652

    
1653
                if (sc->samples_per_frame >= 160) { // gsm
1654
                    samples = sc->samples_per_frame;
1655
                    size = sc->bytes_per_frame;
1656
                } else {
1657
                    if (sc->samples_per_frame > 1) {
1658
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1659
                                        sc->samples_per_frame, chunk_samples);
1660
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1661
                    } else {
1662
                        samples = FFMIN(1024, chunk_samples);
1663
                        size = samples * sc->sample_size;
1664
                    }
1665
                }
1666

    
1667
                if (st->nb_index_entries >= total) {
1668
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1669
                    return;
1670
                }
1671
                e = &st->index_entries[st->nb_index_entries++];
1672
                e->pos = current_offset;
1673
                e->timestamp = current_dts;
1674
                e->size = size;
1675
                e->min_distance = 0;
1676
                e->flags = AVINDEX_KEYFRAME;
1677
                av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1678
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1679
                        size, samples);
1680

    
1681
                current_offset += size;
1682
                current_dts += samples;
1683
                chunk_samples -= samples;
1684
            }
1685
        }
1686
    }
1687
}
1688

    
1689
static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref)
1690
{
1691
    /* try relative path, we do not try the absolute because it can leak information about our
1692
       system to an attacker */
1693
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1694
        char filename[1024];
1695
        char *src_path;
1696
        int i, l;
1697

    
1698
        /* find a source dir */
1699
        src_path = strrchr(src, '/');
1700
        if (src_path)
1701
            src_path++;
1702
        else
1703
            src_path = src;
1704

    
1705
        /* find a next level down to target */
1706
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1707
            if (ref->path[l] == '/') {
1708
                if (i == ref->nlvl_to - 1)
1709
                    break;
1710
                else
1711
                    i++;
1712
            }
1713

    
1714
        /* compose filename if next level down to target was found */
1715
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1716
            memcpy(filename, src, src_path - src);
1717
            filename[src_path - src] = 0;
1718

    
1719
            for (i = 1; i < ref->nlvl_from; i++)
1720
                av_strlcat(filename, "../", 1024);
1721

    
1722
            av_strlcat(filename, ref->path + l + 1, 1024);
1723

    
1724
            if (!avio_open(pb, filename, AVIO_FLAG_READ))
1725
                return 0;
1726
        }
1727
    }
1728

    
1729
    return AVERROR(ENOENT);
1730
}
1731

    
1732
static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1733
{
1734
    AVStream *st;
1735
    MOVStreamContext *sc;
1736
    int ret;
1737

    
1738
    st = av_new_stream(c->fc, c->fc->nb_streams);
1739
    if (!st) return AVERROR(ENOMEM);
1740
    sc = av_mallocz(sizeof(MOVStreamContext));
1741
    if (!sc) return AVERROR(ENOMEM);
1742

    
1743
    st->priv_data = sc;
1744
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1745
    sc->ffindex = st->index;
1746

    
1747
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1748
        return ret;
1749

    
1750
    /* sanity checks */
1751
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1752
                            (!sc->sample_size && !sc->sample_count))) {
1753
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1754
               st->index);
1755
        return 0;
1756
    }
1757

    
1758
    if (sc->time_scale <= 0) {
1759
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1760
        sc->time_scale = c->time_scale;
1761
        if (sc->time_scale <= 0)
1762
            sc->time_scale = 1;
1763
    }
1764

    
1765
    av_set_pts_info(st, 64, 1, sc->time_scale);
1766

    
1767
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1768
        !st->codec->frame_size && sc->stts_count == 1) {
1769
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1770
                                           st->codec->sample_rate, sc->time_scale);
1771
        av_dlog(c->fc, "frame size %d\n", st->codec->frame_size);
1772
    }
1773

    
1774
    mov_build_index(c, st);
1775

    
1776
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1777
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1778
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1779
            av_log(c->fc, AV_LOG_ERROR,
1780
                   "stream %d, error opening alias: path='%s', dir='%s', "
1781
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1782
                   st->index, dref->path, dref->dir, dref->filename,
1783
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1784
    } else
1785
        sc->pb = c->fc->pb;
1786

    
1787
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1788
        if (!st->sample_aspect_ratio.num &&
1789
            (st->codec->width != sc->width || st->codec->height != sc->height)) {
1790
            st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1791
                                             ((double)st->codec->width * sc->height), INT_MAX);
1792
        }
1793

    
1794
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1795
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1796

    
1797
        if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
1798
            av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
1799
                      sc->time_scale, sc->stts_data[0].duration, INT_MAX);
1800
    }
1801

    
1802
    switch (st->codec->codec_id) {
1803
#if CONFIG_H261_DECODER
1804
    case CODEC_ID_H261:
1805
#endif
1806
#if CONFIG_H263_DECODER
1807
    case CODEC_ID_H263:
1808
#endif
1809
#if CONFIG_H264_DECODER
1810
    case CODEC_ID_H264:
1811
#endif
1812
#if CONFIG_MPEG4_DECODER
1813
    case CODEC_ID_MPEG4:
1814
#endif
1815
        st->codec->width = 0; /* let decoder init width/height */
1816
        st->codec->height= 0;
1817
        break;
1818
    }
1819

    
1820
    /* Do not need those anymore. */
1821
    av_freep(&sc->chunk_offsets);
1822
    av_freep(&sc->stsc_data);
1823
    av_freep(&sc->sample_sizes);
1824
    av_freep(&sc->keyframes);
1825
    av_freep(&sc->stts_data);
1826
    av_freep(&sc->stps_data);
1827

    
1828
    return 0;
1829
}
1830

    
1831
static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1832
{
1833
    int ret;
1834
    c->itunes_metadata = 1;
1835
    ret = mov_read_default(c, pb, atom);
1836
    c->itunes_metadata = 0;
1837
    return ret;
1838
}
1839

    
1840
static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1841
{
1842
    while (atom.size > 8) {
1843
        uint32_t tag = avio_rl32(pb);
1844
        atom.size -= 4;
1845
        if (tag == MKTAG('h','d','l','r')) {
1846
            avio_seek(pb, -8, SEEK_CUR);
1847
            atom.size += 8;
1848
            return mov_read_default(c, pb, atom);
1849
        }
1850
    }
1851
    return 0;
1852
}
1853

    
1854
static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1855
{
1856
    int i;
1857
    int width;
1858
    int height;
1859
    int64_t disp_transform[2];
1860
    int display_matrix[3][2];
1861
    AVStream *st;
1862
    MOVStreamContext *sc;
1863
    int version;
1864

    
1865
    if (c->fc->nb_streams < 1)
1866
        return 0;
1867
    st = c->fc->streams[c->fc->nb_streams-1];
1868
    sc = st->priv_data;
1869

    
1870
    version = avio_r8(pb);
1871
    avio_rb24(pb); /* flags */
1872
    /*
1873
    MOV_TRACK_ENABLED 0x0001
1874
    MOV_TRACK_IN_MOVIE 0x0002
1875
    MOV_TRACK_IN_PREVIEW 0x0004
1876
    MOV_TRACK_IN_POSTER 0x0008
1877
    */
1878

    
1879
    if (version == 1) {
1880
        avio_rb64(pb);
1881
        avio_rb64(pb);
1882
    } else {
1883
        avio_rb32(pb); /* creation time */
1884
        avio_rb32(pb); /* modification time */
1885
    }
1886
    st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/
1887
    avio_rb32(pb); /* reserved */
1888

    
1889
    /* highlevel (considering edits) duration in movie timebase */
1890
    (version == 1) ? avio_rb64(pb) : avio_rb32(pb);
1891
    avio_rb32(pb); /* reserved */
1892
    avio_rb32(pb); /* reserved */
1893

    
1894
    avio_rb16(pb); /* layer */
1895
    avio_rb16(pb); /* alternate group */
1896
    avio_rb16(pb); /* volume */
1897
    avio_rb16(pb); /* reserved */
1898

    
1899
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1900
    // they're kept in fixed point format through all calculations
1901
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1902
    for (i = 0; i < 3; i++) {
1903
        display_matrix[i][0] = avio_rb32(pb);   // 16.16 fixed point
1904
        display_matrix[i][1] = avio_rb32(pb);   // 16.16 fixed point
1905
        avio_rb32(pb);           // 2.30 fixed point (not used)
1906
    }
1907

    
1908
    width = avio_rb32(pb);       // 16.16 fixed point track width
1909
    height = avio_rb32(pb);      // 16.16 fixed point track height
1910
    sc->width = width >> 16;
1911
    sc->height = height >> 16;
1912

    
1913
    // transform the display width/height according to the matrix
1914
    // skip this if the display matrix is the default identity matrix
1915
    // or if it is rotating the picture, ex iPhone 3GS
1916
    // to keep the same scale, use [width height 1<<16]
1917
    if (width && height &&
1918
        ((display_matrix[0][0] != 65536  ||
1919
          display_matrix[1][1] != 65536) &&
1920
         !display_matrix[0][1] &&
1921
         !display_matrix[1][0] &&
1922
         !display_matrix[2][0] && !display_matrix[2][1])) {
1923
        for (i = 0; i < 2; i++)
1924
            disp_transform[i] =
1925
                (int64_t)  width  * display_matrix[0][i] +
1926
                (int64_t)  height * display_matrix[1][i] +
1927
                ((int64_t) display_matrix[2][i] << 16);
1928

    
1929
        //sample aspect ratio is new width/height divided by old width/height
1930
        st->sample_aspect_ratio = av_d2q(
1931
            ((double) disp_transform[0] * height) /
1932
            ((double) disp_transform[1] * width), INT_MAX);
1933
    }
1934
    return 0;
1935
}
1936

    
1937
static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1938
{
1939
    MOVFragment *frag = &c->fragment;
1940
    MOVTrackExt *trex = NULL;
1941
    int flags, track_id, i;
1942

    
1943
    avio_r8(pb); /* version */
1944
    flags = avio_rb24(pb);
1945

    
1946
    track_id = avio_rb32(pb);
1947
    if (!track_id)
1948
        return -1;
1949
    frag->track_id = track_id;
1950
    for (i = 0; i < c->trex_count; i++)
1951
        if (c->trex_data[i].track_id == frag->track_id) {
1952
            trex = &c->trex_data[i];
1953
            break;
1954
        }
1955
    if (!trex) {
1956
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1957
        return -1;
1958
    }
1959

    
1960
    if (flags & 0x01) frag->base_data_offset = avio_rb64(pb);
1961
    else              frag->base_data_offset = frag->moof_offset;
1962
    if (flags & 0x02) frag->stsd_id          = avio_rb32(pb);
1963
    else              frag->stsd_id          = trex->stsd_id;
1964

    
1965
    frag->duration = flags & 0x08 ? avio_rb32(pb) : trex->duration;
1966
    frag->size     = flags & 0x10 ? avio_rb32(pb) : trex->size;
1967
    frag->flags    = flags & 0x20 ? avio_rb32(pb) : trex->flags;
1968
    av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
1969
    return 0;
1970
}
1971

    
1972
static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1973
{
1974
    c->chapter_track = avio_rb32(pb);
1975
    return 0;
1976
}
1977

    
1978
static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
1979
{
1980
    MOVTrackExt *trex;
1981

    
1982
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1983
        return -1;
1984
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1985
    if (!trex)
1986
        return AVERROR(ENOMEM);
1987
    c->trex_data = trex;
1988
    trex = &c->trex_data[c->trex_count++];
1989
    avio_r8(pb); /* version */
1990
    avio_rb24(pb); /* flags */
1991
    trex->track_id = avio_rb32(pb);
1992
    trex->stsd_id  = avio_rb32(pb);
1993
    trex->duration = avio_rb32(pb);
1994
    trex->size     = avio_rb32(pb);
1995
    trex->flags    = avio_rb32(pb);
1996
    return 0;
1997
}
1998

    
1999
static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2000
{
2001
    MOVFragment *frag = &c->fragment;
2002
    AVStream *st = NULL;
2003
    MOVStreamContext *sc;
2004
    uint64_t offset;
2005
    int64_t dts;
2006
    int data_offset = 0;
2007
    unsigned entries, first_sample_flags = frag->flags;
2008
    int flags, distance, i;
2009

    
2010
    for (i = 0; i < c->fc->nb_streams; i++) {
2011
        if (c->fc->streams[i]->id == frag->track_id) {
2012
            st = c->fc->streams[i];
2013
            break;
2014
        }
2015
    }
2016
    if (!st) {
2017
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2018
        return -1;
2019
    }
2020
    sc = st->priv_data;
2021
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
2022
        return 0;
2023
    avio_r8(pb); /* version */
2024
    flags = avio_rb24(pb);
2025
    entries = avio_rb32(pb);
2026
    av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
2027
    if (flags & 0x001) data_offset        = avio_rb32(pb);
2028
    if (flags & 0x004) first_sample_flags = avio_rb32(pb);
2029
    if (flags & 0x800) {
2030
        MOVStts *ctts_data;
2031
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2032
            return -1;
2033
        ctts_data = av_realloc(sc->ctts_data,
2034
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2035
        if (!ctts_data)
2036
            return AVERROR(ENOMEM);
2037
        sc->ctts_data = ctts_data;
2038
    }
2039
    dts = st->duration;
2040
    offset = frag->base_data_offset + data_offset;
2041
    distance = 0;
2042
    av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2043
    for (i = 0; i < entries; i++) {
2044
        unsigned sample_size = frag->size;
2045
        int sample_flags = i ? frag->flags : first_sample_flags;
2046
        unsigned sample_duration = frag->duration;
2047
        int keyframe;
2048

    
2049
        if (flags & 0x100) sample_duration = avio_rb32(pb);
2050
        if (flags & 0x200) sample_size     = avio_rb32(pb);
2051
        if (flags & 0x400) sample_flags    = avio_rb32(pb);
2052
        if (flags & 0x800) {
2053
            sc->ctts_data[sc->ctts_count].count = 1;
2054
            sc->ctts_data[sc->ctts_count].duration = avio_rb32(pb);
2055
            sc->ctts_count++;
2056
        }
2057
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2058
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2059
            distance = 0;
2060
        av_add_index_entry(st, offset, dts, sample_size, distance,
2061
                           keyframe ? AVINDEX_KEYFRAME : 0);
2062
        av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2063
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2064
                offset, dts, sample_size, distance, keyframe);
2065
        distance++;
2066
        dts += sample_duration;
2067
        offset += sample_size;
2068
    }
2069
    frag->moof_offset = offset;
2070
    st->duration = dts;
2071
    return 0;
2072
}
2073

    
2074
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2075
/* like the files created with Adobe Premiere 5.0, for samples see */
2076
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2077
static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2078
{
2079
    int err;
2080

    
2081
    if (atom.size < 8)
2082
        return 0; /* continue */
2083
    if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2084
        avio_skip(pb, atom.size - 4);
2085
        return 0;
2086
    }
2087
    atom.type = avio_rl32(pb);
2088
    atom.size -= 8;
2089
    if (atom.type != MKTAG('m','d','a','t')) {
2090
        avio_skip(pb, atom.size);
2091
        return 0;
2092
    }
2093
    err = mov_read_mdat(c, pb, atom);
2094
    return err;
2095
}
2096

    
2097
static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2098
{
2099
#if CONFIG_ZLIB
2100
    AVIOContext ctx;
2101
    uint8_t *cmov_data;
2102
    uint8_t *moov_data; /* uncompressed data */
2103
    long cmov_len, moov_len;
2104
    int ret = -1;
2105

    
2106
    avio_rb32(pb); /* dcom atom */
2107
    if (avio_rl32(pb) != MKTAG('d','c','o','m'))
2108
        return -1;
2109
    if (avio_rl32(pb) != MKTAG('z','l','i','b')) {
2110
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2111
        return -1;
2112
    }
2113
    avio_rb32(pb); /* cmvd atom */
2114
    if (avio_rl32(pb) != MKTAG('c','m','v','d'))
2115
        return -1;
2116
    moov_len = avio_rb32(pb); /* uncompressed size */
2117
    cmov_len = atom.size - 6 * 4;
2118

    
2119
    cmov_data = av_malloc(cmov_len);
2120
    if (!cmov_data)
2121
        return AVERROR(ENOMEM);
2122
    moov_data = av_malloc(moov_len);
2123
    if (!moov_data) {
2124
        av_free(cmov_data);
2125
        return AVERROR(ENOMEM);
2126
    }
2127
    avio_read(pb, cmov_data, cmov_len);
2128
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2129
        goto free_and_return;
2130
    if(ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2131
        goto free_and_return;
2132
    atom.type = MKTAG('m','o','o','v');
2133
    atom.size = moov_len;
2134
#ifdef DEBUG
2135
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2136
#endif
2137
    ret = mov_read_default(c, &ctx, atom);
2138
free_and_return:
2139
    av_free(moov_data);
2140
    av_free(cmov_data);
2141
    return ret;
2142
#else
2143
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2144
    return -1;
2145
#endif
2146
}
2147

    
2148
/* edit list atom */
2149
static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2150
{
2151
    MOVStreamContext *sc;
2152
    int i, edit_count;
2153

    
2154
    if (c->fc->nb_streams < 1)
2155
        return 0;
2156
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2157

    
2158
    avio_r8(pb); /* version */
2159
    avio_rb24(pb); /* flags */
2160
    edit_count = avio_rb32(pb); /* entries */
2161

    
2162
    if((uint64_t)edit_count*12+8 > atom.size)
2163
        return -1;
2164

    
2165
    for(i=0; i<edit_count; i++){
2166
        int time;
2167
        int duration = avio_rb32(pb); /* Track duration */
2168
        time = avio_rb32(pb); /* Media time */
2169
        avio_rb32(pb); /* Media rate */
2170
        if (i == 0 && time >= -1) {
2171
            sc->time_offset = time != -1 ? time : -duration;
2172
        }
2173
    }
2174

    
2175
    if(edit_count > 1)
2176
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2177
               "a/v desync might occur, patch welcome\n");
2178

    
2179
    av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2180
    return 0;
2181
}
2182

    
2183
static int mov_read_chan(MOVContext *c, AVIOContext *pb, MOVAtom atom)
2184
{
2185
    if (atom.size < 16)
2186
        return AVERROR_INVALIDDATA;
2187
    avio_skip(pb, 4);
2188
    ff_mov_read_chan(c->fc, atom.size - 4, c->fc->streams[0]->codec);
2189
    return 0;
2190
}
2191

    
2192
static const MOVParseTableEntry mov_default_parse_table[] = {
2193
{ MKTAG('a','v','s','s'), mov_read_extradata },
2194
{ MKTAG('c','h','p','l'), mov_read_chpl },
2195
{ MKTAG('c','o','6','4'), mov_read_stco },
2196
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2197
{ MKTAG('d','i','n','f'), mov_read_default },
2198
{ MKTAG('d','r','e','f'), mov_read_dref },
2199
{ MKTAG('e','d','t','s'), mov_read_default },
2200
{ MKTAG('e','l','s','t'), mov_read_elst },
2201
{ MKTAG('e','n','d','a'), mov_read_enda },
2202
{ MKTAG('f','i','e','l'), mov_read_extradata },
2203
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2204
{ MKTAG('g','l','b','l'), mov_read_glbl },
2205
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2206
{ MKTAG('i','l','s','t'), mov_read_ilst },
2207
{ MKTAG('j','p','2','h'), mov_read_extradata },
2208
{ MKTAG('m','d','a','t'), mov_read_mdat },
2209
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2210
{ MKTAG('m','d','i','a'), mov_read_default },
2211
{ MKTAG('m','e','t','a'), mov_read_meta },
2212
{ MKTAG('m','i','n','f'), mov_read_default },
2213
{ MKTAG('m','o','o','f'), mov_read_moof },
2214
{ MKTAG('m','o','o','v'), mov_read_moov },
2215
{ MKTAG('m','v','e','x'), mov_read_default },
2216
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2217
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2218
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2219
{ MKTAG('a','v','c','C'), mov_read_glbl },
2220
{ MKTAG('p','a','s','p'), mov_read_pasp },
2221
{ MKTAG('s','t','b','l'), mov_read_default },
2222
{ MKTAG('s','t','c','o'), mov_read_stco },
2223
{ MKTAG('s','t','p','s'), mov_read_stps },
2224
{ MKTAG('s','t','r','f'), mov_read_strf },
2225
{ MKTAG('s','t','s','c'), mov_read_stsc },
2226
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2227
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2228
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2229
{ MKTAG('s','t','t','s'), mov_read_stts },
2230
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2231
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2232
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2233
{ MKTAG('t','r','a','k'), mov_read_trak },
2234
{ MKTAG('t','r','a','f'), mov_read_default },
2235
{ MKTAG('t','r','e','f'), mov_read_default },
2236
{ MKTAG('c','h','a','p'), mov_read_chap },
2237
{ MKTAG('t','r','e','x'), mov_read_trex },
2238
{ MKTAG('t','r','u','n'), mov_read_trun },
2239
{ MKTAG('u','d','t','a'), mov_read_default },
2240
{ MKTAG('w','a','v','e'), mov_read_wave },
2241
{ MKTAG('e','s','d','s'), mov_read_esds },
2242
{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2243
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2244
{ MKTAG('c','m','o','v'), mov_read_cmov },
2245
{ MKTAG('c','h','a','n'), mov_read_chan },
2246
{ 0, NULL }
2247
};
2248

    
2249
static int mov_probe(AVProbeData *p)
2250
{
2251
    unsigned int offset;
2252
    uint32_t tag;
2253
    int score = 0;
2254

    
2255
    /* check file header */
2256
    offset = 0;
2257
    for(;;) {
2258
        /* ignore invalid offset */
2259
        if ((offset + 8) > (unsigned int)p->buf_size)
2260
            return score;
2261
        tag = AV_RL32(p->buf + offset + 4);
2262
        switch(tag) {
2263
        /* check for obvious tags */
2264
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2265
        case MKTAG('m','o','o','v'):
2266
        case MKTAG('m','d','a','t'):
2267
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2268
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2269
        case MKTAG('f','t','y','p'):
2270
            return AVPROBE_SCORE_MAX;
2271
        /* those are more common words, so rate then a bit less */
2272
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2273
        case MKTAG('w','i','d','e'):
2274
        case MKTAG('f','r','e','e'):
2275
        case MKTAG('j','u','n','k'):
2276
        case MKTAG('p','i','c','t'):
2277
            return AVPROBE_SCORE_MAX - 5;
2278
        case MKTAG(0x82,0x82,0x7f,0x7d):
2279
        case MKTAG('s','k','i','p'):
2280
        case MKTAG('u','u','i','d'):
2281
        case MKTAG('p','r','f','l'):
2282
            offset = AV_RB32(p->buf+offset) + offset;
2283
            /* if we only find those cause probedata is too small at least rate them */
2284
            score = AVPROBE_SCORE_MAX - 50;
2285
            break;
2286
        default:
2287
            /* unrecognized tag */
2288
            return score;
2289
        }
2290
    }
2291
    return score;
2292
}
2293

    
2294
// must be done after parsing all trak because there's no order requirement
2295
static void mov_read_chapters(AVFormatContext *s)
2296
{
2297
    MOVContext *mov = s->priv_data;
2298
    AVStream *st = NULL;
2299
    MOVStreamContext *sc;
2300
    int64_t cur_pos;
2301
    int i;
2302

    
2303
    for (i = 0; i < s->nb_streams; i++)
2304
        if (s->streams[i]->id == mov->chapter_track) {
2305
            st = s->streams[i];
2306
            break;
2307
        }
2308
    if (!st) {
2309
        av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2310
        return;
2311
    }
2312

    
2313
    st->discard = AVDISCARD_ALL;
2314
    sc = st->priv_data;
2315
    cur_pos = avio_tell(sc->pb);
2316

    
2317
    for (i = 0; i < st->nb_index_entries; i++) {
2318
        AVIndexEntry *sample = &st->index_entries[i];
2319
        int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2320
        uint8_t *title;
2321
        uint16_t ch;
2322
        int len, title_len;
2323

    
2324
        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2325
            av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2326
            goto finish;
2327
        }
2328

    
2329
        // the first two bytes are the length of the title
2330
        len = avio_rb16(sc->pb);
2331
        if (len > sample->size-2)
2332
            continue;
2333
        title_len = 2*len + 1;
2334
        if (!(title = av_mallocz(title_len)))
2335
            goto finish;
2336

    
2337
        // The samples could theoretically be in any encoding if there's an encd
2338
        // atom following, but in practice are only utf-8 or utf-16, distinguished
2339
        // instead by the presence of a BOM
2340
        ch = avio_rb16(sc->pb);
2341
        if (ch == 0xfeff)
2342
            avio_get_str16be(sc->pb, len, title, title_len);
2343
        else if (ch == 0xfffe)
2344
            avio_get_str16le(sc->pb, len, title, title_len);
2345
        else {
2346
            AV_WB16(title, ch);
2347
            get_strz(sc->pb, title + 2, len - 1);
2348
        }
2349

    
2350
        ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title);
2351
        av_freep(&title);
2352
    }
2353
finish:
2354
    avio_seek(sc->pb, cur_pos, SEEK_SET);
2355
}
2356

    
2357
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2358
{
2359
    MOVContext *mov = s->priv_data;
2360
    AVIOContext *pb = s->pb;
2361
    int err;
2362
    MOVAtom atom = { AV_RL32("root") };
2363

    
2364
    mov->fc = s;
2365
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2366
    if(pb->seekable)
2367
        atom.size = avio_size(pb);
2368
    else
2369
        atom.size = INT64_MAX;
2370

    
2371
    /* check MOV header */
2372
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2373
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2374
        return err;
2375
    }
2376
    if (!mov->found_moov) {
2377
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2378
        return -1;
2379
    }
2380
    av_dlog(mov->fc, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
2381

    
2382
    if (pb->seekable && mov->chapter_track > 0)
2383
        mov_read_chapters(s);
2384

    
2385
    return 0;
2386
}
2387

    
2388
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2389
{
2390
    AVIndexEntry *sample = NULL;
2391
    int64_t best_dts = INT64_MAX;
2392
    int i;
2393
    for (i = 0; i < s->nb_streams; i++) {
2394
        AVStream *avst = s->streams[i];
2395
        MOVStreamContext *msc = avst->priv_data;
2396
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2397
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2398
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2399
            av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2400
            if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
2401
                (s->pb->seekable &&
2402
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2403
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2404
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2405
                sample = current_sample;
2406
                best_dts = dts;
2407
                *st = avst;
2408
            }
2409
        }
2410
    }
2411
    return sample;
2412
}
2413

    
2414
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2415
{
2416
    MOVContext *mov = s->priv_data;
2417
    MOVStreamContext *sc;
2418
    AVIndexEntry *sample;
2419
    AVStream *st = NULL;
2420
    int ret;
2421
 retry:
2422
    sample = mov_find_next_sample(s, &st);
2423
    if (!sample) {
2424
        mov->found_mdat = 0;
2425
        if (s->pb->seekable||
2426
            mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2427
            url_feof(s->pb))
2428
            return AVERROR_EOF;
2429
        av_dlog(s, "read fragments, offset 0x%"PRIx64"\n", avio_tell(s->pb));
2430
        goto retry;
2431
    }
2432
    sc = st->priv_data;
2433
    /* must be done just before reading, to avoid infinite loop on sample */
2434
    sc->current_sample++;
2435

    
2436
    if (st->discard != AVDISCARD_ALL) {
2437
        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2438
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2439
                   sc->ffindex, sample->pos);
2440
            return -1;
2441
        }
2442
        ret = av_get_packet(sc->pb, pkt, sample->size);
2443
        if (ret < 0)
2444
            return ret;
2445
        if (sc->has_palette) {
2446
            uint8_t *pal;
2447

    
2448
            pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
2449
            if (!pal) {
2450
                av_log(mov->fc, AV_LOG_ERROR, "Cannot append palette to packet\n");
2451
            } else {
2452
                memcpy(pal, sc->palette, AVPALETTE_SIZE);
2453
                sc->has_palette = 0;
2454
            }
2455
        }
2456
#if CONFIG_DV_DEMUXER
2457
        if (mov->dv_demux && sc->dv_audio_container) {
2458
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2459
            av_free(pkt->data);
2460
            pkt->size = 0;
2461
            ret = dv_get_packet(mov->dv_demux, pkt);
2462
            if (ret < 0)
2463
                return ret;
2464
        }
2465
#endif
2466
    }
2467

    
2468
    pkt->stream_index = sc->ffindex;
2469
    pkt->dts = sample->timestamp;
2470
    if (sc->ctts_data) {
2471
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2472
        /* update ctts context */
2473
        sc->ctts_sample++;
2474
        if (sc->ctts_index < sc->ctts_count &&
2475
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2476
            sc->ctts_index++;
2477
            sc->ctts_sample = 0;
2478
        }
2479
        if (sc->wrong_dts)
2480
            pkt->dts = AV_NOPTS_VALUE;
2481
    } else {
2482
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2483
            st->index_entries[sc->current_sample].timestamp : st->duration;
2484
        pkt->duration = next_dts - pkt->dts;
2485
        pkt->pts = pkt->dts;
2486
    }
2487
    if (st->discard == AVDISCARD_ALL)
2488
        goto retry;
2489
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2490
    pkt->pos = sample->pos;
2491
    av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2492
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2493
    return 0;
2494
}
2495

    
2496
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2497
{
2498
    MOVStreamContext *sc = st->priv_data;
2499
    int sample, time_sample;
2500
    int i;
2501

    
2502
    sample = av_index_search_timestamp(st, timestamp, flags);
2503
    av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2504
    if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2505
        sample = 0;
2506
    if (sample < 0) /* not sure what to do */
2507
        return -1;
2508
    sc->current_sample = sample;
2509
    av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2510
    /* adjust ctts index */
2511
    if (sc->ctts_data) {
2512
        time_sample = 0;
2513
        for (i = 0; i < sc->ctts_count; i++) {
2514
            int next = time_sample + sc->ctts_data[i].count;
2515
            if (next > sc->current_sample) {
2516
                sc->ctts_index = i;
2517
                sc->ctts_sample = sc->current_sample - time_sample;
2518
                break;
2519
            }
2520
            time_sample = next;
2521
        }
2522
    }
2523
    return sample;
2524
}
2525

    
2526
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2527
{
2528
    AVStream *st;
2529
    int64_t seek_timestamp, timestamp;
2530
    int sample;
2531
    int i;
2532

    
2533
    if (stream_index >= s->nb_streams)
2534
        return -1;
2535
    if (sample_time < 0)
2536
        sample_time = 0;
2537

    
2538
    st = s->streams[stream_index];
2539
    sample = mov_seek_stream(s, st, sample_time, flags);
2540
    if (sample < 0)
2541
        return -1;
2542

    
2543
    /* adjust seek timestamp to found sample timestamp */
2544
    seek_timestamp = st->index_entries[sample].timestamp;
2545

    
2546
    for (i = 0; i < s->nb_streams; i++) {
2547
        st = s->streams[i];
2548
        if (stream_index == i)
2549
            continue;
2550

    
2551
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2552
        mov_seek_stream(s, st, timestamp, flags);
2553
    }
2554
    return 0;
2555
}
2556

    
2557
static int mov_read_close(AVFormatContext *s)
2558
{
2559
    MOVContext *mov = s->priv_data;
2560
    int i, j;
2561

    
2562
    for (i = 0; i < s->nb_streams; i++) {
2563
        AVStream *st = s->streams[i];
2564
        MOVStreamContext *sc = st->priv_data;
2565

    
2566
        av_freep(&sc->ctts_data);
2567
        for (j = 0; j < sc->drefs_count; j++) {
2568
            av_freep(&sc->drefs[j].path);
2569
            av_freep(&sc->drefs[j].dir);
2570
        }
2571
        av_freep(&sc->drefs);
2572
        if (sc->pb && sc->pb != s->pb)
2573
            avio_close(sc->pb);
2574

    
2575
        av_freep(&st->codec->palctrl);
2576
    }
2577

    
2578
    if (mov->dv_demux) {
2579
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2580
            av_freep(&mov->dv_fctx->streams[i]->codec);
2581
            av_freep(&mov->dv_fctx->streams[i]);
2582
        }
2583
        av_freep(&mov->dv_fctx);
2584
        av_freep(&mov->dv_demux);
2585
    }
2586

    
2587
    av_freep(&mov->trex_data);
2588

    
2589
    return 0;
2590
}
2591

    
2592
AVInputFormat ff_mov_demuxer = {
2593
    "mov,mp4,m4a,3gp,3g2,mj2",
2594
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2595
    sizeof(MOVContext),
2596
    mov_probe,
2597
    mov_read_header,
2598
    mov_read_packet,
2599
    mov_read_close,
2600
    mov_read_seek,
2601
};