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ffmpeg / libavformat / mov.c @ 1cf9f6ed

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1
/*
2
 * MOV demuxer
3
 * Copyright (c) 2001 Fabrice Bellard
4
 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
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#include <limits.h>
24

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

    
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "riff.h"
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#include "isom.h"
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#include "libavcodec/mpeg4audio.h"
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#include "libavcodec/mpegaudiodata.h"
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#include "libavcodec/get_bits.h"
37

    
38
#if CONFIG_ZLIB
39
#include <zlib.h>
40
#endif
41

    
42
/*
43
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
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 *
46
 * Features and limitations:
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 * - reads most of the QT files I have (at least the structure),
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 *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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 * - the code is quite ugly... maybe I won't do it recursive next time :-)
50
 *
51
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
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 *
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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 :))
60
 */
61

    
62
#include "qtpalette.h"
63

    
64

    
65
#undef NDEBUG
66
#include <assert.h>
67

    
68
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
69

    
70
/* those functions parse an atom */
71
/* return code:
72
  0: continue to parse next atom
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 <0: error occurred, exit
74
*/
75
/* links atom IDs to parse functions */
76
typedef struct MOVParseTableEntry {
77
    uint32_t type;
78
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
79
} MOVParseTableEntry;
80

    
81
static const MOVParseTableEntry mov_default_parse_table[];
82

    
83
static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
84
{
85
    char buf[16];
86

    
87
    get_be16(pb); // unknown
88
    snprintf(buf, sizeof(buf), "%d", get_be16(pb));
89
    av_metadata_set2(&c->fc->metadata, "track", buf, 0);
90

    
91
    get_be16(pb); // total tracks
92

    
93
    return 0;
94
}
95

    
96
static const uint32_t mac_to_unicode[128] = {
97
    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,
100
    0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
101
    0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
102
    0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
103
    0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
104
    0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
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    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,
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};
114

    
115
static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len,
116
                               char *dst, int dstlen)
117
{
118
    char *p = dst;
119
    char *end = dst+dstlen-1;
120
    int i;
121

    
122
    for (i = 0; i < len; i++) {
123
        uint8_t t, c = get_byte(pb);
124
        if (c < 0x80 && p < end)
125
            *p++ = c;
126
        else
127
            PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
128
    }
129
    *p = 0;
130
    return p - dst;
131
}
132

    
133
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
134
{
135
#ifdef MOV_EXPORT_ALL_METADATA
136
    char tmp_key[5];
137
#endif
138
    char str[1024], key2[16], language[4] = {0};
139
    const char *key = NULL;
140
    uint16_t str_size, langcode = 0;
141
    uint32_t data_type = 0;
142
    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
143

    
144
    switch (atom.type) {
145
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
146
    case MKTAG(0xa9,'a','u','t'):
147
    case MKTAG(0xa9,'A','R','T'): key = "author";    break;
148
    case MKTAG(0xa9,'w','r','t'): key = "composer";  break;
149
    case MKTAG( 'c','p','r','t'):
150
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
151
    case MKTAG(0xa9,'c','m','t'):
152
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
153
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
154
    case MKTAG(0xa9,'d','a','y'): key = "date";      break;
155
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
156
    case MKTAG(0xa9,'t','o','o'):
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 = get_be32(pb);
169
        int tag = get_le32(pb);
170
        if (tag == MKTAG('d','a','t','a')) {
171
            data_type = get_be32(pb); // type
172
            get_be32(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 = get_be16(pb); // string length
178
        langcode = get_be16(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
            get_buffer(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, ByteIOContext *pb, MOVAtom atom)
223
{
224
    int64_t start;
225
    int i, nb_chapters, str_len;
226
    char str[256+1];
227

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

    
231
    get_be32(pb); // version + flags
232
    get_be32(pb); // ???
233
    nb_chapters = get_byte(pb);
234

    
235
    for (i = 0; i < nb_chapters; i++) {
236
        if (atom.size < 9)
237
            return 0;
238

    
239
        start = get_be64(pb);
240
        str_len = get_byte(pb);
241

    
242
        if ((atom.size -= 9+str_len) < 0)
243
            return 0;
244

    
245
        get_buffer(pb, str, str_len);
246
        str[str_len] = 0;
247
        ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
248
    }
249
    return 0;
250
}
251

    
252
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
253
{
254
    int64_t total_size = 0;
255
    MOVAtom a;
256
    int i;
257

    
258
    if (atom.size < 0)
259
        atom.size = INT64_MAX;
260
    while (total_size + 8 < atom.size && !url_feof(pb)) {
261
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
262
        a.size = atom.size;
263
        a.type=0;
264
        if(atom.size >= 8) {
265
            a.size = get_be32(pb);
266
            a.type = get_le32(pb);
267
        }
268
        total_size += 8;
269
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
270
                a.type, (char*)&a.type, a.size, atom.size, total_size);
271
        if (a.size == 1) { /* 64 bit extended size */
272
            a.size = get_be64(pb) - 8;
273
            total_size += 8;
274
        }
275
        if (a.size == 0) {
276
            a.size = atom.size - total_size;
277
            if (a.size <= 8)
278
                break;
279
        }
280
        a.size -= 8;
281
        if(a.size < 0)
282
            break;
283
        a.size = FFMIN(a.size, atom.size - total_size);
284

    
285
        for (i = 0; mov_default_parse_table[i].type; i++)
286
            if (mov_default_parse_table[i].type == a.type) {
287
                parse = mov_default_parse_table[i].parse;
288
                break;
289
            }
290

    
291
        // container is user data
292
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
293
                       atom.type == MKTAG('i','l','s','t')))
294
            parse = mov_read_udta_string;
295

    
296
        if (!parse) { /* skip leaf atoms data */
297
            url_fskip(pb, a.size);
298
        } else {
299
            int64_t start_pos = url_ftell(pb);
300
            int64_t left;
301
            int err = parse(c, pb, a);
302
            if (err < 0)
303
                return err;
304
            if (c->found_moov && c->found_mdat &&
305
                (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
306
                return 0;
307
            left = a.size - url_ftell(pb) + start_pos;
308
            if (left > 0) /* skip garbage at atom end */
309
                url_fskip(pb, left);
310
        }
311

    
312
        total_size += a.size;
313
    }
314

    
315
    if (total_size < atom.size && atom.size < 0x7ffff)
316
        url_fskip(pb, atom.size - total_size);
317

    
318
    return 0;
319
}
320

    
321
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
322
{
323
    AVStream *st;
324
    MOVStreamContext *sc;
325
    int entries, i, j;
326

    
327
    if (c->fc->nb_streams < 1)
328
        return 0;
329
    st = c->fc->streams[c->fc->nb_streams-1];
330
    sc = st->priv_data;
331

    
332
    get_be32(pb); // version + flags
333
    entries = get_be32(pb);
334
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
335
        return -1;
336
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
337
    if (!sc->drefs)
338
        return AVERROR(ENOMEM);
339
    sc->drefs_count = entries;
340

    
341
    for (i = 0; i < sc->drefs_count; i++) {
342
        MOVDref *dref = &sc->drefs[i];
343
        uint32_t size = get_be32(pb);
344
        int64_t next = url_ftell(pb) + size - 4;
345

    
346
        dref->type = get_le32(pb);
347
        get_be32(pb); // version + flags
348
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
349

    
350
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
351
            /* macintosh alias record */
352
            uint16_t volume_len, len;
353
            int16_t type;
354

    
355
            url_fskip(pb, 10);
356

    
357
            volume_len = get_byte(pb);
358
            volume_len = FFMIN(volume_len, 27);
359
            get_buffer(pb, dref->volume, 27);
360
            dref->volume[volume_len] = 0;
361
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
362

    
363
            url_fskip(pb, 12);
364

    
365
            len = get_byte(pb);
366
            len = FFMIN(len, 63);
367
            get_buffer(pb, dref->filename, 63);
368
            dref->filename[len] = 0;
369
            av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
370

    
371
            url_fskip(pb, 16);
372

    
373
            /* read next level up_from_alias/down_to_target */
374
            dref->nlvl_from = get_be16(pb);
375
            dref->nlvl_to   = get_be16(pb);
376
            av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
377
                   dref->nlvl_from, dref->nlvl_to);
378

    
379
            url_fskip(pb, 16);
380

    
381
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
382
                type = get_be16(pb);
383
                len = get_be16(pb);
384
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
385
                if (len&1)
386
                    len += 1;
387
                if (type == 2) { // absolute path
388
                    av_free(dref->path);
389
                    dref->path = av_mallocz(len+1);
390
                    if (!dref->path)
391
                        return AVERROR(ENOMEM);
392
                    get_buffer(pb, dref->path, len);
393
                    if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
394
                        len -= volume_len;
395
                        memmove(dref->path, dref->path+volume_len, len);
396
                        dref->path[len] = 0;
397
                    }
398
                    for (j = 0; j < len; j++)
399
                        if (dref->path[j] == ':')
400
                            dref->path[j] = '/';
401
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
402
                } else if (type == 0) { // directory name
403
                    av_free(dref->dir);
404
                    dref->dir = av_malloc(len+1);
405
                    if (!dref->dir)
406
                        return AVERROR(ENOMEM);
407
                    get_buffer(pb, dref->dir, len);
408
                    dref->dir[len] = 0;
409
                    for (j = 0; j < len; j++)
410
                        if (dref->dir[j] == ':')
411
                            dref->dir[j] = '/';
412
                    av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
413
                } else
414
                    url_fskip(pb, len);
415
            }
416
        }
417
        url_fseek(pb, next, SEEK_SET);
418
    }
419
    return 0;
420
}
421

    
422
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
423
{
424
    AVStream *st;
425
    uint32_t type;
426
    uint32_t ctype;
427

    
428
    if (c->fc->nb_streams < 1) // meta before first trak
429
        return 0;
430

    
431
    st = c->fc->streams[c->fc->nb_streams-1];
432

    
433
    get_byte(pb); /* version */
434
    get_be24(pb); /* flags */
435

    
436
    /* component type */
437
    ctype = get_le32(pb);
438
    type = get_le32(pb); /* component subtype */
439

    
440
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
441
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
442

    
443
    if     (type == MKTAG('v','i','d','e'))
444
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
445
    else if(type == MKTAG('s','o','u','n'))
446
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
447
    else if(type == MKTAG('m','1','a',' '))
448
        st->codec->codec_id = CODEC_ID_MP2;
449
    else if(type == MKTAG('s','u','b','p'))
450
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
451

    
452
    get_be32(pb); /* component  manufacture */
453
    get_be32(pb); /* component flags */
454
    get_be32(pb); /* component flags mask */
455

    
456
    return 0;
457
}
458

    
459
int ff_mp4_read_descr_len(ByteIOContext *pb)
460
{
461
    int len = 0;
462
    int count = 4;
463
    while (count--) {
464
        int c = get_byte(pb);
465
        len = (len << 7) | (c & 0x7f);
466
        if (!(c & 0x80))
467
            break;
468
    }
469
    return len;
470
}
471

    
472
static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
473
{
474
    int len;
475
    *tag = get_byte(pb);
476
    len = ff_mp4_read_descr_len(pb);
477
    dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
478
    return len;
479
}
480

    
481
#define MP4ESDescrTag                   0x03
482
#define MP4DecConfigDescrTag            0x04
483
#define MP4DecSpecificDescrTag          0x05
484

    
485
static const AVCodecTag mp4_audio_types[] = {
486
    { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
487
    { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
488
    { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
489
    { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
490
    { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
491
    { CODEC_ID_NONE,   AOT_NULL },
492
};
493

    
494
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
495
{
496
    AVStream *st;
497
    int tag, len;
498

    
499
    if (fc->nb_streams < 1)
500
        return 0;
501
    st = fc->streams[fc->nb_streams-1];
502

    
503
    get_be32(pb); /* version + flags */
504
    len = mp4_read_descr(fc, pb, &tag);
505
    if (tag == MP4ESDescrTag) {
506
        get_be16(pb); /* ID */
507
        get_byte(pb); /* priority */
508
    } else
509
        get_be16(pb); /* ID */
510

    
511
    len = mp4_read_descr(fc, pb, &tag);
512
    if (tag == MP4DecConfigDescrTag) {
513
        int object_type_id = get_byte(pb);
514
        get_byte(pb); /* stream type */
515
        get_be24(pb); /* buffer size db */
516
        get_be32(pb); /* max bitrate */
517
        get_be32(pb); /* avg bitrate */
518

    
519
        st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
520
        dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
521
        len = mp4_read_descr(fc, pb, &tag);
522
        if (tag == MP4DecSpecificDescrTag) {
523
            dprintf(fc, "Specific MPEG4 header len=%d\n", len);
524
            if((uint64_t)len > (1<<30))
525
                return -1;
526
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
527
            if (!st->codec->extradata)
528
                return AVERROR(ENOMEM);
529
            get_buffer(pb, st->codec->extradata, len);
530
            st->codec->extradata_size = len;
531
            if (st->codec->codec_id == CODEC_ID_AAC) {
532
                MPEG4AudioConfig cfg;
533
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
534
                                         st->codec->extradata_size);
535
                st->codec->channels = cfg.channels;
536
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
537
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
538
                else
539
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
540
                dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
541
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
542
                        cfg.object_type, cfg.ext_object_type,
543
                        cfg.sample_rate, cfg.ext_sample_rate);
544
                if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
545
                                                            cfg.object_type)))
546
                    st->codec->codec_id = CODEC_ID_AAC;
547
            }
548
        }
549
    }
550
    return 0;
551
}
552

    
553
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
554
{
555
    return ff_mov_read_esds(c->fc, pb, atom);
556
}
557

    
558
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
559
{
560
    const int num = get_be32(pb);
561
    const int den = get_be32(pb);
562
    AVStream *st;
563

    
564
    if (c->fc->nb_streams < 1)
565
        return 0;
566
    st = c->fc->streams[c->fc->nb_streams-1];
567

    
568
    if (den != 0) {
569
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
570
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
571
            av_log(c->fc, AV_LOG_WARNING,
572
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
573
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
574
        st->sample_aspect_ratio.num = num;
575
        st->sample_aspect_ratio.den = den;
576
    }
577
    return 0;
578
}
579

    
580
/* this atom contains actual media data */
581
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
582
{
583
    if(atom.size == 0) /* wrong one (MP4) */
584
        return 0;
585
    c->found_mdat=1;
586
    return 0; /* now go for moov */
587
}
588

    
589
/* read major brand, minor version and compatible brands and store them as metadata */
590
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
591
{
592
    uint32_t minor_ver;
593
    int comp_brand_size;
594
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
595
    char* comp_brands_str;
596
    uint8_t type[5] = {0};
597

    
598
    get_buffer(pb, type, 4);
599
    if (strcmp(type, "qt  "))
600
        c->isom = 1;
601
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
602
    av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
603
    minor_ver = get_be32(pb); /* minor version */
604
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
605
    av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
606

    
607
    comp_brand_size = atom.size - 8;
608
    if (comp_brand_size < 0)
609
        return -1;
610
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
611
    if (!comp_brands_str)
612
        return AVERROR(ENOMEM);
613
    get_buffer(pb, comp_brands_str, comp_brand_size);
614
    comp_brands_str[comp_brand_size] = 0;
615
    av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
616
    av_freep(&comp_brands_str);
617

    
618
    return 0;
619
}
620

    
621
/* this atom should contain all header atoms */
622
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
623
{
624
    if (mov_read_default(c, pb, atom) < 0)
625
        return -1;
626
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
627
    /* so we don't parse the whole file if over a network */
628
    c->found_moov=1;
629
    return 0; /* now go for mdat */
630
}
631

    
632
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
633
{
634
    c->fragment.moof_offset = url_ftell(pb) - 8;
635
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
636
    return mov_read_default(c, pb, atom);
637
}
638

    
639
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
640
{
641
    AVStream *st;
642
    MOVStreamContext *sc;
643
    int version;
644
    char language[4] = {0};
645
    unsigned lang;
646

    
647
    if (c->fc->nb_streams < 1)
648
        return 0;
649
    st = c->fc->streams[c->fc->nb_streams-1];
650
    sc = st->priv_data;
651

    
652
    version = get_byte(pb);
653
    if (version > 1)
654
        return -1; /* unsupported */
655

    
656
    get_be24(pb); /* flags */
657
    if (version == 1) {
658
        get_be64(pb);
659
        get_be64(pb);
660
    } else {
661
        get_be32(pb); /* creation time */
662
        get_be32(pb); /* modification time */
663
    }
664

    
665
    sc->time_scale = get_be32(pb);
666
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
667

    
668
    lang = get_be16(pb); /* language */
669
    if (ff_mov_lang_to_iso639(lang, language))
670
        av_metadata_set2(&st->metadata, "language", language, 0);
671
    get_be16(pb); /* quality */
672

    
673
    return 0;
674
}
675

    
676
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
677
{
678
    int version = get_byte(pb); /* version */
679
    get_be24(pb); /* flags */
680

    
681
    if (version == 1) {
682
        get_be64(pb);
683
        get_be64(pb);
684
    } else {
685
        get_be32(pb); /* creation time */
686
        get_be32(pb); /* modification time */
687
    }
688
    c->time_scale = get_be32(pb); /* time scale */
689

    
690
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
691

    
692
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
693
    get_be32(pb); /* preferred scale */
694

    
695
    get_be16(pb); /* preferred volume */
696

    
697
    url_fskip(pb, 10); /* reserved */
698

    
699
    url_fskip(pb, 36); /* display matrix */
700

    
701
    get_be32(pb); /* preview time */
702
    get_be32(pb); /* preview duration */
703
    get_be32(pb); /* poster time */
704
    get_be32(pb); /* selection time */
705
    get_be32(pb); /* selection duration */
706
    get_be32(pb); /* current time */
707
    get_be32(pb); /* next track ID */
708

    
709
    return 0;
710
}
711

    
712
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
713
{
714
    AVStream *st;
715

    
716
    if (c->fc->nb_streams < 1)
717
        return 0;
718
    st = c->fc->streams[c->fc->nb_streams-1];
719

    
720
    if((uint64_t)atom.size > (1<<30))
721
        return -1;
722

    
723
    // currently SVQ3 decoder expect full STSD header - so let's fake it
724
    // this should be fixed and just SMI header should be passed
725
    av_free(st->codec->extradata);
726
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
727
    if (!st->codec->extradata)
728
        return AVERROR(ENOMEM);
729
    st->codec->extradata_size = 0x5a + atom.size;
730
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
731
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
732
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
733
    return 0;
734
}
735

    
736
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
737
{
738
    AVStream *st;
739
    int little_endian;
740

    
741
    if (c->fc->nb_streams < 1)
742
        return 0;
743
    st = c->fc->streams[c->fc->nb_streams-1];
744

    
745
    little_endian = get_be16(pb);
746
    dprintf(c->fc, "enda %d\n", little_endian);
747
    if (little_endian == 1) {
748
        switch (st->codec->codec_id) {
749
        case CODEC_ID_PCM_S24BE:
750
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
751
            break;
752
        case CODEC_ID_PCM_S32BE:
753
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
754
            break;
755
        case CODEC_ID_PCM_F32BE:
756
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
757
            break;
758
        case CODEC_ID_PCM_F64BE:
759
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
760
            break;
761
        default:
762
            break;
763
        }
764
    }
765
    return 0;
766
}
767

    
768
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
769
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
770
{
771
    AVStream *st;
772
    uint64_t size;
773
    uint8_t *buf;
774

    
775
    if (c->fc->nb_streams < 1) // will happen with jp2 files
776
        return 0;
777
    st= c->fc->streams[c->fc->nb_streams-1];
778
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
779
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
780
        return -1;
781
    buf= av_realloc(st->codec->extradata, size);
782
    if(!buf)
783
        return -1;
784
    st->codec->extradata= buf;
785
    buf+= st->codec->extradata_size;
786
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
787
    AV_WB32(       buf    , atom.size + 8);
788
    AV_WL32(       buf + 4, atom.type);
789
    get_buffer(pb, buf + 8, atom.size);
790
    return 0;
791
}
792

    
793
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
794
{
795
    AVStream *st;
796

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

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

    
804
    if (st->codec->codec_id == CODEC_ID_QDM2) {
805
        // pass all frma atom to codec, needed at least for QDM2
806
        av_free(st->codec->extradata);
807
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
808
        if (!st->codec->extradata)
809
            return AVERROR(ENOMEM);
810
        st->codec->extradata_size = atom.size;
811
        get_buffer(pb, st->codec->extradata, atom.size);
812
    } else if (atom.size > 8) { /* to read frma, esds atoms */
813
        if (mov_read_default(c, pb, atom) < 0)
814
            return -1;
815
    } else
816
        url_fskip(pb, atom.size);
817
    return 0;
818
}
819

    
820
/**
821
 * This function reads atom content and puts data in extradata without tag
822
 * nor size unlike mov_read_extradata.
823
 */
824
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
825
{
826
    AVStream *st;
827

    
828
    if (c->fc->nb_streams < 1)
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 + FF_INPUT_BUFFER_PADDING_SIZE);
837
    if (!st->codec->extradata)
838
        return AVERROR(ENOMEM);
839
    st->codec->extradata_size = atom.size;
840
    get_buffer(pb, st->codec->extradata, atom.size);
841
    return 0;
842
}
843

    
844
/**
845
 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
846
 * but can have extradata appended at the end after the 40 bytes belonging
847
 * to the struct.
848
 */
849
static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
850
{
851
    AVStream *st;
852

    
853
    if (c->fc->nb_streams < 1)
854
        return 0;
855
    if (atom.size <= 40)
856
        return 0;
857
    st = c->fc->streams[c->fc->nb_streams-1];
858

    
859
    if((uint64_t)atom.size > (1<<30))
860
        return -1;
861

    
862
    av_free(st->codec->extradata);
863
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
864
    if (!st->codec->extradata)
865
        return AVERROR(ENOMEM);
866
    st->codec->extradata_size = atom.size - 40;
867
    url_fskip(pb, 40);
868
    get_buffer(pb, st->codec->extradata, atom.size - 40);
869
    return 0;
870
}
871

    
872
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
873
{
874
    AVStream *st;
875
    MOVStreamContext *sc;
876
    unsigned int i, entries;
877

    
878
    if (c->fc->nb_streams < 1)
879
        return 0;
880
    st = c->fc->streams[c->fc->nb_streams-1];
881
    sc = st->priv_data;
882

    
883
    get_byte(pb); /* version */
884
    get_be24(pb); /* flags */
885

    
886
    entries = get_be32(pb);
887

    
888
    if(entries >= UINT_MAX/sizeof(int64_t))
889
        return -1;
890

    
891
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
892
    if (!sc->chunk_offsets)
893
        return AVERROR(ENOMEM);
894
    sc->chunk_count = entries;
895

    
896
    if      (atom.type == MKTAG('s','t','c','o'))
897
        for(i=0; i<entries; i++)
898
            sc->chunk_offsets[i] = get_be32(pb);
899
    else if (atom.type == MKTAG('c','o','6','4'))
900
        for(i=0; i<entries; i++)
901
            sc->chunk_offsets[i] = get_be64(pb);
902
    else
903
        return -1;
904

    
905
    return 0;
906
}
907

    
908
/**
909
 * Compute codec id for 'lpcm' tag.
910
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
911
 */
912
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
913
{
914
    if (flags & 1) { // floating point
915
        if (flags & 2) { // big endian
916
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
917
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
918
        } else {
919
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
920
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
921
        }
922
    } else {
923
        if (flags & 2) {
924
            if      (bps == 8)
925
                // signed integer
926
                if (flags & 4)  return CODEC_ID_PCM_S8;
927
                else            return CODEC_ID_PCM_U8;
928
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
929
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
930
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
931
        } else {
932
            if      (bps == 8)
933
                if (flags & 4)  return CODEC_ID_PCM_S8;
934
                else            return CODEC_ID_PCM_U8;
935
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
936
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
937
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
938
        }
939
    }
940
    return CODEC_ID_NONE;
941
}
942

    
943
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
944
{
945
    AVStream *st;
946
    MOVStreamContext *sc;
947
    int j, entries, pseudo_stream_id;
948

    
949
    if (c->fc->nb_streams < 1)
950
        return 0;
951
    st = c->fc->streams[c->fc->nb_streams-1];
952
    sc = st->priv_data;
953

    
954
    get_byte(pb); /* version */
955
    get_be24(pb); /* flags */
956

    
957
    entries = get_be32(pb);
958

    
959
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
960
        //Parsing Sample description table
961
        enum CodecID id;
962
        int dref_id = 1;
963
        MOVAtom a = { 0 };
964
        int64_t start_pos = url_ftell(pb);
965
        int size = get_be32(pb); /* size */
966
        uint32_t format = get_le32(pb); /* data format */
967

    
968
        if (size >= 16) {
969
            get_be32(pb); /* reserved */
970
            get_be16(pb); /* reserved */
971
            dref_id = get_be16(pb);
972
        }
973

    
974
        if (st->codec->codec_tag &&
975
            st->codec->codec_tag != format &&
976
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
977
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
978
           ){
979
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
980
             * export it as a separate AVStream but this needs a few changes
981
             * in the MOV demuxer, patch welcome. */
982
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
983
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
984
            continue;
985
        }
986
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
987
        sc->dref_id= dref_id;
988

    
989
        st->codec->codec_tag = format;
990
        id = ff_codec_get_id(codec_movaudio_tags, format);
991
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
992
            id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
993

    
994
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
995
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
996
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
997
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
998
            id = ff_codec_get_id(codec_movvideo_tags, format);
999
            if (id <= 0)
1000
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
1001
            if (id > 0)
1002
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1003
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
1004
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1005
                if(id > 0)
1006
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1007
            }
1008
        }
1009

    
1010
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1011
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1012
                (format >> 24) & 0xff, st->codec->codec_type);
1013

    
1014
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1015
            unsigned int color_depth, len;
1016
            int color_greyscale;
1017

    
1018
            st->codec->codec_id = id;
1019
            get_be16(pb); /* version */
1020
            get_be16(pb); /* revision level */
1021
            get_be32(pb); /* vendor */
1022
            get_be32(pb); /* temporal quality */
1023
            get_be32(pb); /* spatial quality */
1024

    
1025
            st->codec->width = get_be16(pb); /* width */
1026
            st->codec->height = get_be16(pb); /* height */
1027

    
1028
            get_be32(pb); /* horiz resolution */
1029
            get_be32(pb); /* vert resolution */
1030
            get_be32(pb); /* data size, always 0 */
1031
            get_be16(pb); /* frames per samples */
1032

    
1033
            len = get_byte(pb); /* codec name, pascal string */
1034
            if (len > 31)
1035
                len = 31;
1036
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1037
            if (len < 31)
1038
                url_fskip(pb, 31 - len);
1039
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
1040
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1041
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1042

    
1043
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
1044
            st->codec->color_table_id = get_be16(pb); /* colortable id */
1045
            dprintf(c->fc, "depth %d, ctab id %d\n",
1046
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
1047
            /* figure out the palette situation */
1048
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
1049
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1050

    
1051
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
1052
            if ((color_depth == 2) || (color_depth == 4) ||
1053
                (color_depth == 8)) {
1054
                /* for palette traversal */
1055
                unsigned int color_start, color_count, color_end;
1056
                unsigned char r, g, b;
1057

    
1058
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1059
                if (color_greyscale) {
1060
                    int color_index, color_dec;
1061
                    /* compute the greyscale palette */
1062
                    st->codec->bits_per_coded_sample = color_depth;
1063
                    color_count = 1 << color_depth;
1064
                    color_index = 255;
1065
                    color_dec = 256 / (color_count - 1);
1066
                    for (j = 0; j < color_count; j++) {
1067
                        r = g = b = color_index;
1068
                        st->codec->palctrl->palette[j] =
1069
                            (r << 16) | (g << 8) | (b);
1070
                        color_index -= color_dec;
1071
                        if (color_index < 0)
1072
                            color_index = 0;
1073
                    }
1074
                } else if (st->codec->color_table_id) {
1075
                    const uint8_t *color_table;
1076
                    /* if flag bit 3 is set, use the default palette */
1077
                    color_count = 1 << color_depth;
1078
                    if (color_depth == 2)
1079
                        color_table = ff_qt_default_palette_4;
1080
                    else if (color_depth == 4)
1081
                        color_table = ff_qt_default_palette_16;
1082
                    else
1083
                        color_table = ff_qt_default_palette_256;
1084

    
1085
                    for (j = 0; j < color_count; j++) {
1086
                        r = color_table[j * 3 + 0];
1087
                        g = color_table[j * 3 + 1];
1088
                        b = color_table[j * 3 + 2];
1089
                        st->codec->palctrl->palette[j] =
1090
                            (r << 16) | (g << 8) | (b);
1091
                    }
1092
                } else {
1093
                    /* load the palette from the file */
1094
                    color_start = get_be32(pb);
1095
                    color_count = get_be16(pb);
1096
                    color_end = get_be16(pb);
1097
                    if ((color_start <= 255) &&
1098
                        (color_end <= 255)) {
1099
                        for (j = color_start; j <= color_end; j++) {
1100
                            /* each R, G, or B component is 16 bits;
1101
                             * only use the top 8 bits; skip alpha bytes
1102
                             * up front */
1103
                            get_byte(pb);
1104
                            get_byte(pb);
1105
                            r = get_byte(pb);
1106
                            get_byte(pb);
1107
                            g = get_byte(pb);
1108
                            get_byte(pb);
1109
                            b = get_byte(pb);
1110
                            get_byte(pb);
1111
                            st->codec->palctrl->palette[j] =
1112
                                (r << 16) | (g << 8) | (b);
1113
                        }
1114
                    }
1115
                }
1116
                st->codec->palctrl->palette_changed = 1;
1117
            }
1118
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1119
            int bits_per_sample, flags;
1120
            uint16_t version = get_be16(pb);
1121

    
1122
            st->codec->codec_id = id;
1123
            get_be16(pb); /* revision level */
1124
            get_be32(pb); /* vendor */
1125

    
1126
            st->codec->channels = get_be16(pb);             /* channel count */
1127
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1128
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
1129

    
1130
            sc->audio_cid = get_be16(pb);
1131
            get_be16(pb); /* packet size = 0 */
1132

    
1133
            st->codec->sample_rate = ((get_be32(pb) >> 16));
1134

    
1135
            //Read QT version 1 fields. In version 0 these do not exist.
1136
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1137
            if(!c->isom) {
1138
                if(version==1) {
1139
                    sc->samples_per_frame = get_be32(pb);
1140
                    get_be32(pb); /* bytes per packet */
1141
                    sc->bytes_per_frame = get_be32(pb);
1142
                    get_be32(pb); /* bytes per sample */
1143
                } else if(version==2) {
1144
                    get_be32(pb); /* sizeof struct only */
1145
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1146
                    st->codec->channels = get_be32(pb);
1147
                    get_be32(pb); /* always 0x7F000000 */
1148
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1149
                    flags = get_be32(pb); /* lpcm format specific flag */
1150
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1151
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1152
                    if (format == MKTAG('l','p','c','m'))
1153
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1154
                }
1155
            }
1156

    
1157
            switch (st->codec->codec_id) {
1158
            case CODEC_ID_PCM_S8:
1159
            case CODEC_ID_PCM_U8:
1160
                if (st->codec->bits_per_coded_sample == 16)
1161
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1162
                break;
1163
            case CODEC_ID_PCM_S16LE:
1164
            case CODEC_ID_PCM_S16BE:
1165
                if (st->codec->bits_per_coded_sample == 8)
1166
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1167
                else if (st->codec->bits_per_coded_sample == 24)
1168
                    st->codec->codec_id =
1169
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1170
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1171
                break;
1172
            /* set values for old format before stsd version 1 appeared */
1173
            case CODEC_ID_MACE3:
1174
                sc->samples_per_frame = 6;
1175
                sc->bytes_per_frame = 2*st->codec->channels;
1176
                break;
1177
            case CODEC_ID_MACE6:
1178
                sc->samples_per_frame = 6;
1179
                sc->bytes_per_frame = 1*st->codec->channels;
1180
                break;
1181
            case CODEC_ID_ADPCM_IMA_QT:
1182
                sc->samples_per_frame = 64;
1183
                sc->bytes_per_frame = 34*st->codec->channels;
1184
                break;
1185
            case CODEC_ID_GSM:
1186
                sc->samples_per_frame = 160;
1187
                sc->bytes_per_frame = 33;
1188
                break;
1189
            default:
1190
                break;
1191
            }
1192

    
1193
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1194
            if (bits_per_sample) {
1195
                st->codec->bits_per_coded_sample = bits_per_sample;
1196
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1197
            }
1198
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1199
            // ttxt stsd contains display flags, justification, background
1200
            // color, fonts, and default styles, so fake an atom to read it
1201
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1202
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1203
                mov_read_glbl(c, pb, fake_atom);
1204
            st->codec->codec_id= id;
1205
            st->codec->width = sc->width;
1206
            st->codec->height = sc->height;
1207
        } else {
1208
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1209
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1210
        }
1211
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1212
        a.size = size - (url_ftell(pb) - start_pos);
1213
        if (a.size > 8) {
1214
            if (mov_read_default(c, pb, a) < 0)
1215
                return -1;
1216
        } else if (a.size > 0)
1217
            url_fskip(pb, a.size);
1218
    }
1219

    
1220
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1221
        st->codec->sample_rate= sc->time_scale;
1222

    
1223
    /* special codec parameters handling */
1224
    switch (st->codec->codec_id) {
1225
#if CONFIG_DV_DEMUXER
1226
    case CODEC_ID_DVAUDIO:
1227
        c->dv_fctx = avformat_alloc_context();
1228
        c->dv_demux = dv_init_demux(c->dv_fctx);
1229
        if (!c->dv_demux) {
1230
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1231
            return -1;
1232
        }
1233
        sc->dv_audio_container = 1;
1234
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1235
        break;
1236
#endif
1237
    /* no ifdef since parameters are always those */
1238
    case CODEC_ID_QCELP:
1239
        // force sample rate for qcelp when not stored in mov
1240
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1241
            st->codec->sample_rate = 8000;
1242
        st->codec->frame_size= 160;
1243
        st->codec->channels= 1; /* really needed */
1244
        break;
1245
    case CODEC_ID_AMR_NB:
1246
    case CODEC_ID_AMR_WB:
1247
        st->codec->frame_size= sc->samples_per_frame;
1248
        st->codec->channels= 1; /* really needed */
1249
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1250
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1251
            st->codec->sample_rate = 8000;
1252
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1253
            st->codec->sample_rate = 16000;
1254
        break;
1255
    case CODEC_ID_MP2:
1256
    case CODEC_ID_MP3:
1257
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1258
        st->need_parsing = AVSTREAM_PARSE_FULL;
1259
        break;
1260
    case CODEC_ID_GSM:
1261
    case CODEC_ID_ADPCM_MS:
1262
    case CODEC_ID_ADPCM_IMA_WAV:
1263
        st->codec->block_align = sc->bytes_per_frame;
1264
        break;
1265
    case CODEC_ID_ALAC:
1266
        if (st->codec->extradata_size == 36) {
1267
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1268
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1269
        }
1270
        break;
1271
    default:
1272
        break;
1273
    }
1274

    
1275
    return 0;
1276
}
1277

    
1278
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1279
{
1280
    AVStream *st;
1281
    MOVStreamContext *sc;
1282
    unsigned int i, entries;
1283

    
1284
    if (c->fc->nb_streams < 1)
1285
        return 0;
1286
    st = c->fc->streams[c->fc->nb_streams-1];
1287
    sc = st->priv_data;
1288

    
1289
    get_byte(pb); /* version */
1290
    get_be24(pb); /* flags */
1291

    
1292
    entries = get_be32(pb);
1293

    
1294
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1295

    
1296
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1297
        return -1;
1298
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1299
    if (!sc->stsc_data)
1300
        return AVERROR(ENOMEM);
1301
    sc->stsc_count = entries;
1302

    
1303
    for(i=0; i<entries; i++) {
1304
        sc->stsc_data[i].first = get_be32(pb);
1305
        sc->stsc_data[i].count = get_be32(pb);
1306
        sc->stsc_data[i].id = get_be32(pb);
1307
    }
1308
    return 0;
1309
}
1310

    
1311
static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1312
{
1313
    AVStream *st;
1314
    MOVStreamContext *sc;
1315
    unsigned i, entries;
1316

    
1317
    if (c->fc->nb_streams < 1)
1318
        return 0;
1319
    st = c->fc->streams[c->fc->nb_streams-1];
1320
    sc = st->priv_data;
1321

    
1322
    get_be32(pb); // version + flags
1323

    
1324
    entries = get_be32(pb);
1325
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1326
        return -1;
1327
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1328
    if (!sc->stps_data)
1329
        return AVERROR(ENOMEM);
1330
    sc->stps_count = entries;
1331

    
1332
    for (i = 0; i < entries; i++) {
1333
        sc->stps_data[i] = get_be32(pb);
1334
        //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1335
    }
1336

    
1337
    return 0;
1338
}
1339

    
1340
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1341
{
1342
    AVStream *st;
1343
    MOVStreamContext *sc;
1344
    unsigned int i, entries;
1345

    
1346
    if (c->fc->nb_streams < 1)
1347
        return 0;
1348
    st = c->fc->streams[c->fc->nb_streams-1];
1349
    sc = st->priv_data;
1350

    
1351
    get_byte(pb); /* version */
1352
    get_be24(pb); /* flags */
1353

    
1354
    entries = get_be32(pb);
1355

    
1356
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1357

    
1358
    if(entries >= UINT_MAX / sizeof(int))
1359
        return -1;
1360
    sc->keyframes = av_malloc(entries * sizeof(int));
1361
    if (!sc->keyframes)
1362
        return AVERROR(ENOMEM);
1363
    sc->keyframe_count = entries;
1364

    
1365
    for(i=0; i<entries; i++) {
1366
        sc->keyframes[i] = get_be32(pb);
1367
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1368
    }
1369
    return 0;
1370
}
1371

    
1372
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1373
{
1374
    AVStream *st;
1375
    MOVStreamContext *sc;
1376
    unsigned int i, entries, sample_size, field_size, num_bytes;
1377
    GetBitContext gb;
1378
    unsigned char* buf;
1379

    
1380
    if (c->fc->nb_streams < 1)
1381
        return 0;
1382
    st = c->fc->streams[c->fc->nb_streams-1];
1383
    sc = st->priv_data;
1384

    
1385
    get_byte(pb); /* version */
1386
    get_be24(pb); /* flags */
1387

    
1388
    if (atom.type == MKTAG('s','t','s','z')) {
1389
        sample_size = get_be32(pb);
1390
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1391
            sc->sample_size = sample_size;
1392
        field_size = 32;
1393
    } else {
1394
        sample_size = 0;
1395
        get_be24(pb); /* reserved */
1396
        field_size = get_byte(pb);
1397
    }
1398
    entries = get_be32(pb);
1399

    
1400
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1401

    
1402
    sc->sample_count = entries;
1403
    if (sample_size)
1404
        return 0;
1405

    
1406
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1407
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1408
        return -1;
1409
    }
1410

    
1411
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1412
        return -1;
1413
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1414
    if (!sc->sample_sizes)
1415
        return AVERROR(ENOMEM);
1416

    
1417
    num_bytes = (entries*field_size+4)>>3;
1418

    
1419
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1420
    if (!buf) {
1421
        av_freep(&sc->sample_sizes);
1422
        return AVERROR(ENOMEM);
1423
    }
1424

    
1425
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1426
        av_freep(&sc->sample_sizes);
1427
        av_free(buf);
1428
        return -1;
1429
    }
1430

    
1431
    init_get_bits(&gb, buf, 8*num_bytes);
1432

    
1433
    for(i=0; i<entries; i++)
1434
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1435

    
1436
    av_free(buf);
1437
    return 0;
1438
}
1439

    
1440
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1441
{
1442
    AVStream *st;
1443
    MOVStreamContext *sc;
1444
    unsigned int i, entries;
1445
    int64_t duration=0;
1446
    int64_t total_sample_count=0;
1447

    
1448
    if (c->fc->nb_streams < 1)
1449
        return 0;
1450
    st = c->fc->streams[c->fc->nb_streams-1];
1451
    sc = st->priv_data;
1452

    
1453
    get_byte(pb); /* version */
1454
    get_be24(pb); /* flags */
1455
    entries = get_be32(pb);
1456

    
1457
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1458

    
1459
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1460
        return -1;
1461
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1462
    if (!sc->stts_data)
1463
        return AVERROR(ENOMEM);
1464
    sc->stts_count = entries;
1465

    
1466
    for(i=0; i<entries; i++) {
1467
        int sample_duration;
1468
        int sample_count;
1469

    
1470
        sample_count=get_be32(pb);
1471
        sample_duration = get_be32(pb);
1472
        sc->stts_data[i].count= sample_count;
1473
        sc->stts_data[i].duration= sample_duration;
1474

    
1475
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1476

    
1477
        duration+=(int64_t)sample_duration*sample_count;
1478
        total_sample_count+=sample_count;
1479
    }
1480

    
1481
    st->nb_frames= total_sample_count;
1482
    if(duration)
1483
        st->duration= duration;
1484
    return 0;
1485
}
1486

    
1487
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1488
{
1489
    AVStream *st;
1490
    MOVStreamContext *sc;
1491
    unsigned int i, entries;
1492

    
1493
    if (c->fc->nb_streams < 1)
1494
        return 0;
1495
    st = c->fc->streams[c->fc->nb_streams-1];
1496
    sc = st->priv_data;
1497

    
1498
    get_byte(pb); /* version */
1499
    get_be24(pb); /* flags */
1500
    entries = get_be32(pb);
1501

    
1502
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1503

    
1504
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1505
        return -1;
1506
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1507
    if (!sc->ctts_data)
1508
        return AVERROR(ENOMEM);
1509
    sc->ctts_count = entries;
1510

    
1511
    for(i=0; i<entries; i++) {
1512
        int count    =get_be32(pb);
1513
        int duration =get_be32(pb);
1514

    
1515
        sc->ctts_data[i].count   = count;
1516
        sc->ctts_data[i].duration= duration;
1517
        if (duration < 0)
1518
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1519
    }
1520

    
1521
    dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1522

    
1523
    return 0;
1524
}
1525

    
1526
static void mov_build_index(MOVContext *mov, AVStream *st)
1527
{
1528
    MOVStreamContext *sc = st->priv_data;
1529
    int64_t current_offset;
1530
    int64_t current_dts = 0;
1531
    unsigned int stts_index = 0;
1532
    unsigned int stsc_index = 0;
1533
    unsigned int stss_index = 0;
1534
    unsigned int stps_index = 0;
1535
    unsigned int i, j;
1536
    uint64_t stream_size = 0;
1537

    
1538
    /* adjust first dts according to edit list */
1539
    if (sc->time_offset) {
1540
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1541
        current_dts = -rescaled;
1542
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1543
            /* more than 16 frames delay, dts are likely wrong
1544
               this happens with files created by iMovie */
1545
            sc->wrong_dts = 1;
1546
            st->codec->has_b_frames = 1;
1547
        }
1548
    }
1549

    
1550
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1551
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1552
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1553
        unsigned int current_sample = 0;
1554
        unsigned int stts_sample = 0;
1555
        unsigned int sample_size;
1556
        unsigned int distance = 0;
1557
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1558

    
1559
        current_dts -= sc->dts_shift;
1560

    
1561
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1562
            return;
1563
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1564
        if (!st->index_entries)
1565
            return;
1566
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1567

    
1568
        for (i = 0; i < sc->chunk_count; i++) {
1569
            current_offset = sc->chunk_offsets[i];
1570
            if (stsc_index + 1 < sc->stsc_count &&
1571
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1572
                stsc_index++;
1573
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1574
                int keyframe = 0;
1575
                if (current_sample >= sc->sample_count) {
1576
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1577
                    return;
1578
                }
1579

    
1580
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1581
                    keyframe = 1;
1582
                    if (stss_index + 1 < sc->keyframe_count)
1583
                        stss_index++;
1584
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1585
                    keyframe = 1;
1586
                    if (stps_index + 1 < sc->stps_count)
1587
                        stps_index++;
1588
                }
1589
                if (keyframe)
1590
                    distance = 0;
1591
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1592
                if(sc->pseudo_stream_id == -1 ||
1593
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1594
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1595
                    e->pos = current_offset;
1596
                    e->timestamp = current_dts;
1597
                    e->size = sample_size;
1598
                    e->min_distance = distance;
1599
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1600
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1601
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1602
                            current_offset, current_dts, sample_size, distance, keyframe);
1603
                }
1604

    
1605
                current_offset += sample_size;
1606
                stream_size += sample_size;
1607
                current_dts += sc->stts_data[stts_index].duration;
1608
                distance++;
1609
                stts_sample++;
1610
                current_sample++;
1611
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1612
                    stts_sample = 0;
1613
                    stts_index++;
1614
                }
1615
            }
1616
        }
1617
        if (st->duration > 0)
1618
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1619
    } else {
1620
        unsigned chunk_samples, total = 0;
1621

    
1622
        // compute total chunk count
1623
        for (i = 0; i < sc->stsc_count; i++) {
1624
            unsigned count, chunk_count;
1625

    
1626
            chunk_samples = sc->stsc_data[i].count;
1627
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1628
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1629
                return;
1630
            }
1631

    
1632
            if (sc->samples_per_frame >= 160) { // gsm
1633
                count = chunk_samples / sc->samples_per_frame;
1634
            } else if (sc->samples_per_frame > 1) {
1635
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1636
                count = (chunk_samples+samples-1) / samples;
1637
            } else {
1638
                count = (chunk_samples+1023) / 1024;
1639
            }
1640

    
1641
            if (i < sc->stsc_count - 1)
1642
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1643
            else
1644
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1645
            total += chunk_count * count;
1646
        }
1647

    
1648
        dprintf(mov->fc, "chunk count %d\n", total);
1649
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1650
            return;
1651
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1652
        if (!st->index_entries)
1653
            return;
1654
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1655

    
1656
        // populate index
1657
        for (i = 0; i < sc->chunk_count; i++) {
1658
            current_offset = sc->chunk_offsets[i];
1659
            if (stsc_index + 1 < sc->stsc_count &&
1660
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1661
                stsc_index++;
1662
            chunk_samples = sc->stsc_data[stsc_index].count;
1663

    
1664
            while (chunk_samples > 0) {
1665
                AVIndexEntry *e;
1666
                unsigned size, samples;
1667

    
1668
                if (sc->samples_per_frame >= 160) { // gsm
1669
                    samples = sc->samples_per_frame;
1670
                    size = sc->bytes_per_frame;
1671
                } else {
1672
                    if (sc->samples_per_frame > 1) {
1673
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1674
                                        sc->samples_per_frame, chunk_samples);
1675
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1676
                    } else {
1677
                        samples = FFMIN(1024, chunk_samples);
1678
                        size = samples * sc->sample_size;
1679
                    }
1680
                }
1681

    
1682
                if (st->nb_index_entries >= total) {
1683
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1684
                    return;
1685
                }
1686
                e = &st->index_entries[st->nb_index_entries++];
1687
                e->pos = current_offset;
1688
                e->timestamp = current_dts;
1689
                e->size = size;
1690
                e->min_distance = 0;
1691
                e->flags = AVINDEX_KEYFRAME;
1692
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1693
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1694
                        size, samples);
1695

    
1696
                current_offset += size;
1697
                current_dts += samples;
1698
                chunk_samples -= samples;
1699
            }
1700
        }
1701
    }
1702
}
1703

    
1704
static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1705
{
1706
    /* try relative path, we do not try the absolute because it can leak information about our
1707
       system to an attacker */
1708
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1709
        char filename[1024];
1710
        char *src_path;
1711
        int i, l;
1712

    
1713
        /* find a source dir */
1714
        src_path = strrchr(src, '/');
1715
        if (src_path)
1716
            src_path++;
1717
        else
1718
            src_path = src;
1719

    
1720
        /* find a next level down to target */
1721
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1722
            if (ref->path[l] == '/') {
1723
                if (i == ref->nlvl_to - 1)
1724
                    break;
1725
                else
1726
                    i++;
1727
            }
1728

    
1729
        /* compose filename if next level down to target was found */
1730
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1731
            memcpy(filename, src, src_path - src);
1732
            filename[src_path - src] = 0;
1733

    
1734
            for (i = 1; i < ref->nlvl_from; i++)
1735
                av_strlcat(filename, "../", 1024);
1736

    
1737
            av_strlcat(filename, ref->path + l + 1, 1024);
1738

    
1739
            if (!url_fopen(pb, filename, URL_RDONLY))
1740
                return 0;
1741
        }
1742
    }
1743

    
1744
    return AVERROR(ENOENT);
1745
};
1746

    
1747
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1748
{
1749
    AVStream *st;
1750
    MOVStreamContext *sc;
1751
    int ret;
1752

    
1753
    st = av_new_stream(c->fc, c->fc->nb_streams);
1754
    if (!st) return AVERROR(ENOMEM);
1755
    sc = av_mallocz(sizeof(MOVStreamContext));
1756
    if (!sc) return AVERROR(ENOMEM);
1757

    
1758
    st->priv_data = sc;
1759
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1760
    sc->ffindex = st->index;
1761

    
1762
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1763
        return ret;
1764

    
1765
    /* sanity checks */
1766
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1767
                            (!sc->sample_size && !sc->sample_count))) {
1768
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1769
               st->index);
1770
        return 0;
1771
    }
1772

    
1773
    if (!sc->time_scale) {
1774
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1775
        sc->time_scale = c->time_scale;
1776
        if (!sc->time_scale)
1777
            sc->time_scale = 1;
1778
    }
1779

    
1780
    av_set_pts_info(st, 64, 1, sc->time_scale);
1781

    
1782
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1783
        !st->codec->frame_size && sc->stts_count == 1) {
1784
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1785
                                           st->codec->sample_rate, sc->time_scale);
1786
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1787
    }
1788

    
1789
    mov_build_index(c, st);
1790

    
1791
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1792
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1793
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1794
            av_log(c->fc, AV_LOG_ERROR,
1795
                   "stream %d, error opening alias: path='%s', dir='%s', "
1796
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1797
                   st->index, dref->path, dref->dir, dref->filename,
1798
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1799
    } else
1800
        sc->pb = c->fc->pb;
1801

    
1802
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1803
        if (st->codec->width != sc->width || st->codec->height != sc->height) {
1804
            AVRational r = av_d2q(((double)st->codec->height * sc->width) /
1805
                                  ((double)st->codec->width * sc->height), INT_MAX);
1806
            if (st->sample_aspect_ratio.num)
1807
                st->sample_aspect_ratio = av_mul_q(st->sample_aspect_ratio, r);
1808
            else
1809
                st->sample_aspect_ratio = r;
1810
        }
1811

    
1812
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1813
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1814
    }
1815

    
1816
    switch (st->codec->codec_id) {
1817
#if CONFIG_H261_DECODER
1818
    case CODEC_ID_H261:
1819
#endif
1820
#if CONFIG_H263_DECODER
1821
    case CODEC_ID_H263:
1822
#endif
1823
#if CONFIG_H264_DECODER
1824
    case CODEC_ID_H264:
1825
#endif
1826
#if CONFIG_MPEG4_DECODER
1827
    case CODEC_ID_MPEG4:
1828
#endif
1829
        st->codec->width = 0; /* let decoder init width/height */
1830
        st->codec->height= 0;
1831
        break;
1832
    }
1833

    
1834
    /* Do not need those anymore. */
1835
    av_freep(&sc->chunk_offsets);
1836
    av_freep(&sc->stsc_data);
1837
    av_freep(&sc->sample_sizes);
1838
    av_freep(&sc->keyframes);
1839
    av_freep(&sc->stts_data);
1840
    av_freep(&sc->stps_data);
1841

    
1842
    return 0;
1843
}
1844

    
1845
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1846
{
1847
    int ret;
1848
    c->itunes_metadata = 1;
1849
    ret = mov_read_default(c, pb, atom);
1850
    c->itunes_metadata = 0;
1851
    return ret;
1852
}
1853

    
1854
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1855
{
1856
    while (atom.size > 8) {
1857
        uint32_t tag = get_le32(pb);
1858
        atom.size -= 4;
1859
        if (tag == MKTAG('h','d','l','r')) {
1860
            url_fseek(pb, -8, SEEK_CUR);
1861
            atom.size += 8;
1862
            return mov_read_default(c, pb, atom);
1863
        }
1864
    }
1865
    return 0;
1866
}
1867

    
1868
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1869
{
1870
    int i;
1871
    int width;
1872
    int height;
1873
    int64_t disp_transform[2];
1874
    int display_matrix[3][2];
1875
    AVStream *st;
1876
    MOVStreamContext *sc;
1877
    int version;
1878

    
1879
    if (c->fc->nb_streams < 1)
1880
        return 0;
1881
    st = c->fc->streams[c->fc->nb_streams-1];
1882
    sc = st->priv_data;
1883

    
1884
    version = get_byte(pb);
1885
    get_be24(pb); /* flags */
1886
    /*
1887
    MOV_TRACK_ENABLED 0x0001
1888
    MOV_TRACK_IN_MOVIE 0x0002
1889
    MOV_TRACK_IN_PREVIEW 0x0004
1890
    MOV_TRACK_IN_POSTER 0x0008
1891
    */
1892

    
1893
    if (version == 1) {
1894
        get_be64(pb);
1895
        get_be64(pb);
1896
    } else {
1897
        get_be32(pb); /* creation time */
1898
        get_be32(pb); /* modification time */
1899
    }
1900
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1901
    get_be32(pb); /* reserved */
1902

    
1903
    /* highlevel (considering edits) duration in movie timebase */
1904
    (version == 1) ? get_be64(pb) : get_be32(pb);
1905
    get_be32(pb); /* reserved */
1906
    get_be32(pb); /* reserved */
1907

    
1908
    get_be16(pb); /* layer */
1909
    get_be16(pb); /* alternate group */
1910
    get_be16(pb); /* volume */
1911
    get_be16(pb); /* reserved */
1912

    
1913
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1914
    // they're kept in fixed point format through all calculations
1915
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1916
    for (i = 0; i < 3; i++) {
1917
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1918
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1919
        get_be32(pb);           // 2.30 fixed point (not used)
1920
    }
1921

    
1922
    width = get_be32(pb);       // 16.16 fixed point track width
1923
    height = get_be32(pb);      // 16.16 fixed point track height
1924
    sc->width = width >> 16;
1925
    sc->height = height >> 16;
1926

    
1927
    // transform the display width/height according to the matrix
1928
    // skip this if the display matrix is the default identity matrix
1929
    // or if it is rotating the picture, ex iPhone 3GS
1930
    // to keep the same scale, use [width height 1<<16]
1931
    if (width && height &&
1932
        ((display_matrix[0][0] != 65536  ||
1933
          display_matrix[1][1] != 65536) &&
1934
         !display_matrix[0][1] &&
1935
         !display_matrix[1][0] &&
1936
         !display_matrix[2][0] && !display_matrix[2][1])) {
1937
        for (i = 0; i < 2; i++)
1938
            disp_transform[i] =
1939
                (int64_t)  width  * display_matrix[0][i] +
1940
                (int64_t)  height * display_matrix[1][i] +
1941
                ((int64_t) display_matrix[2][i] << 16);
1942

    
1943
        //sample aspect ratio is new width/height divided by old width/height
1944
        st->sample_aspect_ratio = av_d2q(
1945
            ((double) disp_transform[0] * height) /
1946
            ((double) disp_transform[1] * width), INT_MAX);
1947
    }
1948
    return 0;
1949
}
1950

    
1951
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1952
{
1953
    MOVFragment *frag = &c->fragment;
1954
    MOVTrackExt *trex = NULL;
1955
    int flags, track_id, i;
1956

    
1957
    get_byte(pb); /* version */
1958
    flags = get_be24(pb);
1959

    
1960
    track_id = get_be32(pb);
1961
    if (!track_id)
1962
        return -1;
1963
    frag->track_id = track_id;
1964
    for (i = 0; i < c->trex_count; i++)
1965
        if (c->trex_data[i].track_id == frag->track_id) {
1966
            trex = &c->trex_data[i];
1967
            break;
1968
        }
1969
    if (!trex) {
1970
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1971
        return -1;
1972
    }
1973

    
1974
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1975
    else              frag->base_data_offset = frag->moof_offset;
1976
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1977
    else              frag->stsd_id          = trex->stsd_id;
1978

    
1979
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1980
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1981
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1982
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1983
    return 0;
1984
}
1985

    
1986
static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1987
{
1988
    c->chapter_track = get_be32(pb);
1989
    return 0;
1990
}
1991

    
1992
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1993
{
1994
    MOVTrackExt *trex;
1995

    
1996
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1997
        return -1;
1998
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1999
    if (!trex)
2000
        return AVERROR(ENOMEM);
2001
    c->trex_data = trex;
2002
    trex = &c->trex_data[c->trex_count++];
2003
    get_byte(pb); /* version */
2004
    get_be24(pb); /* flags */
2005
    trex->track_id = get_be32(pb);
2006
    trex->stsd_id  = get_be32(pb);
2007
    trex->duration = get_be32(pb);
2008
    trex->size     = get_be32(pb);
2009
    trex->flags    = get_be32(pb);
2010
    return 0;
2011
}
2012

    
2013
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2014
{
2015
    MOVFragment *frag = &c->fragment;
2016
    AVStream *st = NULL;
2017
    MOVStreamContext *sc;
2018
    uint64_t offset;
2019
    int64_t dts;
2020
    int data_offset = 0;
2021
    unsigned entries, first_sample_flags = frag->flags;
2022
    int flags, distance, i;
2023

    
2024
    for (i = 0; i < c->fc->nb_streams; i++) {
2025
        if (c->fc->streams[i]->id == frag->track_id) {
2026
            st = c->fc->streams[i];
2027
            break;
2028
        }
2029
    }
2030
    if (!st) {
2031
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2032
        return -1;
2033
    }
2034
    sc = st->priv_data;
2035
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
2036
        return 0;
2037
    get_byte(pb); /* version */
2038
    flags = get_be24(pb);
2039
    entries = get_be32(pb);
2040
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
2041
    if (flags & 0x001) data_offset        = get_be32(pb);
2042
    if (flags & 0x004) first_sample_flags = get_be32(pb);
2043
    if (flags & 0x800) {
2044
        MOVStts *ctts_data;
2045
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2046
            return -1;
2047
        ctts_data = av_realloc(sc->ctts_data,
2048
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2049
        if (!ctts_data)
2050
            return AVERROR(ENOMEM);
2051
        sc->ctts_data = ctts_data;
2052
    }
2053
    dts = st->duration;
2054
    offset = frag->base_data_offset + data_offset;
2055
    distance = 0;
2056
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2057
    for (i = 0; i < entries; i++) {
2058
        unsigned sample_size = frag->size;
2059
        int sample_flags = i ? frag->flags : first_sample_flags;
2060
        unsigned sample_duration = frag->duration;
2061
        int keyframe;
2062

    
2063
        if (flags & 0x100) sample_duration = get_be32(pb);
2064
        if (flags & 0x200) sample_size     = get_be32(pb);
2065
        if (flags & 0x400) sample_flags    = get_be32(pb);
2066
        if (flags & 0x800) {
2067
            sc->ctts_data[sc->ctts_count].count = 1;
2068
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2069
            sc->ctts_count++;
2070
        }
2071
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2072
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2073
            distance = 0;
2074
        av_add_index_entry(st, offset, dts, sample_size, distance,
2075
                           keyframe ? AVINDEX_KEYFRAME : 0);
2076
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2077
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2078
                offset, dts, sample_size, distance, keyframe);
2079
        distance++;
2080
        dts += sample_duration;
2081
        offset += sample_size;
2082
    }
2083
    frag->moof_offset = offset;
2084
    st->duration = dts;
2085
    return 0;
2086
}
2087

    
2088
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2089
/* like the files created with Adobe Premiere 5.0, for samples see */
2090
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2091
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2092
{
2093
    int err;
2094

    
2095
    if (atom.size < 8)
2096
        return 0; /* continue */
2097
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2098
        url_fskip(pb, atom.size - 4);
2099
        return 0;
2100
    }
2101
    atom.type = get_le32(pb);
2102
    atom.size -= 8;
2103
    if (atom.type != MKTAG('m','d','a','t')) {
2104
        url_fskip(pb, atom.size);
2105
        return 0;
2106
    }
2107
    err = mov_read_mdat(c, pb, atom);
2108
    return err;
2109
}
2110

    
2111
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2112
{
2113
#if CONFIG_ZLIB
2114
    ByteIOContext ctx;
2115
    uint8_t *cmov_data;
2116
    uint8_t *moov_data; /* uncompressed data */
2117
    long cmov_len, moov_len;
2118
    int ret = -1;
2119

    
2120
    get_be32(pb); /* dcom atom */
2121
    if (get_le32(pb) != MKTAG('d','c','o','m'))
2122
        return -1;
2123
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
2124
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2125
        return -1;
2126
    }
2127
    get_be32(pb); /* cmvd atom */
2128
    if (get_le32(pb) != MKTAG('c','m','v','d'))
2129
        return -1;
2130
    moov_len = get_be32(pb); /* uncompressed size */
2131
    cmov_len = atom.size - 6 * 4;
2132

    
2133
    cmov_data = av_malloc(cmov_len);
2134
    if (!cmov_data)
2135
        return AVERROR(ENOMEM);
2136
    moov_data = av_malloc(moov_len);
2137
    if (!moov_data) {
2138
        av_free(cmov_data);
2139
        return AVERROR(ENOMEM);
2140
    }
2141
    get_buffer(pb, cmov_data, cmov_len);
2142
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2143
        goto free_and_return;
2144
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2145
        goto free_and_return;
2146
    atom.type = MKTAG('m','o','o','v');
2147
    atom.size = moov_len;
2148
#ifdef DEBUG
2149
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2150
#endif
2151
    ret = mov_read_default(c, &ctx, atom);
2152
free_and_return:
2153
    av_free(moov_data);
2154
    av_free(cmov_data);
2155
    return ret;
2156
#else
2157
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2158
    return -1;
2159
#endif
2160
}
2161

    
2162
/* edit list atom */
2163
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2164
{
2165
    MOVStreamContext *sc;
2166
    int i, edit_count;
2167

    
2168
    if (c->fc->nb_streams < 1)
2169
        return 0;
2170
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2171

    
2172
    get_byte(pb); /* version */
2173
    get_be24(pb); /* flags */
2174
    edit_count = get_be32(pb); /* entries */
2175

    
2176
    if((uint64_t)edit_count*12+8 > atom.size)
2177
        return -1;
2178

    
2179
    for(i=0; i<edit_count; i++){
2180
        int time;
2181
        int duration = get_be32(pb); /* Track duration */
2182
        time = get_be32(pb); /* Media time */
2183
        get_be32(pb); /* Media rate */
2184
        if (i == 0 && time >= -1) {
2185
            sc->time_offset = time != -1 ? time : -duration;
2186
        }
2187
    }
2188

    
2189
    if(edit_count > 1)
2190
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2191
               "a/v desync might occur, patch welcome\n");
2192

    
2193
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2194
    return 0;
2195
}
2196

    
2197
static const MOVParseTableEntry mov_default_parse_table[] = {
2198
{ MKTAG('a','v','s','s'), mov_read_extradata },
2199
{ MKTAG('c','h','p','l'), mov_read_chpl },
2200
{ MKTAG('c','o','6','4'), mov_read_stco },
2201
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2202
{ MKTAG('d','i','n','f'), mov_read_default },
2203
{ MKTAG('d','r','e','f'), mov_read_dref },
2204
{ MKTAG('e','d','t','s'), mov_read_default },
2205
{ MKTAG('e','l','s','t'), mov_read_elst },
2206
{ MKTAG('e','n','d','a'), mov_read_enda },
2207
{ MKTAG('f','i','e','l'), mov_read_extradata },
2208
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2209
{ MKTAG('g','l','b','l'), mov_read_glbl },
2210
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2211
{ MKTAG('i','l','s','t'), mov_read_ilst },
2212
{ MKTAG('j','p','2','h'), mov_read_extradata },
2213
{ MKTAG('m','d','a','t'), mov_read_mdat },
2214
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2215
{ MKTAG('m','d','i','a'), mov_read_default },
2216
{ MKTAG('m','e','t','a'), mov_read_meta },
2217
{ MKTAG('m','i','n','f'), mov_read_default },
2218
{ MKTAG('m','o','o','f'), mov_read_moof },
2219
{ MKTAG('m','o','o','v'), mov_read_moov },
2220
{ MKTAG('m','v','e','x'), mov_read_default },
2221
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2222
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2223
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2224
{ MKTAG('a','v','c','C'), mov_read_glbl },
2225
{ MKTAG('p','a','s','p'), mov_read_pasp },
2226
{ MKTAG('s','t','b','l'), mov_read_default },
2227
{ MKTAG('s','t','c','o'), mov_read_stco },
2228
{ MKTAG('s','t','p','s'), mov_read_stps },
2229
{ MKTAG('s','t','r','f'), mov_read_strf },
2230
{ MKTAG('s','t','s','c'), mov_read_stsc },
2231
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2232
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2233
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2234
{ MKTAG('s','t','t','s'), mov_read_stts },
2235
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2236
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2237
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2238
{ MKTAG('t','r','a','k'), mov_read_trak },
2239
{ MKTAG('t','r','a','f'), mov_read_default },
2240
{ MKTAG('t','r','e','f'), mov_read_default },
2241
{ MKTAG('c','h','a','p'), mov_read_chap },
2242
{ MKTAG('t','r','e','x'), mov_read_trex },
2243
{ MKTAG('t','r','u','n'), mov_read_trun },
2244
{ MKTAG('u','d','t','a'), mov_read_default },
2245
{ MKTAG('w','a','v','e'), mov_read_wave },
2246
{ MKTAG('e','s','d','s'), mov_read_esds },
2247
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2248
{ MKTAG('c','m','o','v'), mov_read_cmov },
2249
{ 0, NULL }
2250
};
2251

    
2252
static int mov_probe(AVProbeData *p)
2253
{
2254
    unsigned int offset;
2255
    uint32_t tag;
2256
    int score = 0;
2257

    
2258
    /* check file header */
2259
    offset = 0;
2260
    for(;;) {
2261
        /* ignore invalid offset */
2262
        if ((offset + 8) > (unsigned int)p->buf_size)
2263
            return score;
2264
        tag = AV_RL32(p->buf + offset + 4);
2265
        switch(tag) {
2266
        /* check for obvious tags */
2267
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2268
        case MKTAG('m','o','o','v'):
2269
        case MKTAG('m','d','a','t'):
2270
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2271
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2272
        case MKTAG('f','t','y','p'):
2273
            return AVPROBE_SCORE_MAX;
2274
        /* those are more common words, so rate then a bit less */
2275
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2276
        case MKTAG('w','i','d','e'):
2277
        case MKTAG('f','r','e','e'):
2278
        case MKTAG('j','u','n','k'):
2279
        case MKTAG('p','i','c','t'):
2280
            return AVPROBE_SCORE_MAX - 5;
2281
        case MKTAG(0x82,0x82,0x7f,0x7d):
2282
        case MKTAG('s','k','i','p'):
2283
        case MKTAG('u','u','i','d'):
2284
        case MKTAG('p','r','f','l'):
2285
            offset = AV_RB32(p->buf+offset) + offset;
2286
            /* if we only find those cause probedata is too small at least rate them */
2287
            score = AVPROBE_SCORE_MAX - 50;
2288
            break;
2289
        default:
2290
            /* unrecognized tag */
2291
            return score;
2292
        }
2293
    }
2294
    return score;
2295
}
2296

    
2297
// must be done after parsing all trak because there's no order requirement
2298
static void mov_read_chapters(AVFormatContext *s)
2299
{
2300
    MOVContext *mov = s->priv_data;
2301
    AVStream *st = NULL;
2302
    MOVStreamContext *sc;
2303
    int64_t cur_pos;
2304
    uint8_t *title = NULL;
2305
    int i, len, i8, i16;
2306

    
2307
    for (i = 0; i < s->nb_streams; i++)
2308
        if (s->streams[i]->id == mov->chapter_track) {
2309
            st = s->streams[i];
2310
            break;
2311
        }
2312
    if (!st) {
2313
        av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2314
        return;
2315
    }
2316

    
2317
    st->discard = AVDISCARD_ALL;
2318
    sc = st->priv_data;
2319
    cur_pos = url_ftell(sc->pb);
2320

    
2321
    for (i = 0; i < st->nb_index_entries; i++) {
2322
        AVIndexEntry *sample = &st->index_entries[i];
2323
        int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2324

    
2325
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2326
            av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2327
            goto finish;
2328
        }
2329

    
2330
        title = av_malloc(sample->size+2);
2331
        get_buffer(sc->pb, title, sample->size);
2332

    
2333
        // the first two bytes are the length of the title
2334
        len = AV_RB16(title);
2335
        if (len > sample->size-2)
2336
            continue;
2337

    
2338
        // The samples could theoretically be in any encoding if there's an encd
2339
        // atom following, but in practice are only utf-8 or utf-16, distinguished
2340
        // instead by the presence of a BOM
2341
        if (AV_RB16(title+2) == 0xfeff) {
2342
            uint8_t *utf8 = av_malloc(2*len+3);
2343

    
2344
            i8 = i16 = 0;
2345
            while (i16 < len) {
2346
                uint32_t ch;
2347
                uint8_t tmp;
2348
                GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
2349
                PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
2350
            }
2351
            utf8[2+i8] = 0;
2352
            av_freep(&title);
2353
            title = utf8;
2354
        }
2355

    
2356
        ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
2357
        av_freep(&title);
2358
    }
2359
finish:
2360
    av_free(title);
2361
    url_fseek(sc->pb, cur_pos, SEEK_SET);
2362
}
2363

    
2364
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2365
{
2366
    MOVContext *mov = s->priv_data;
2367
    ByteIOContext *pb = s->pb;
2368
    int err;
2369
    MOVAtom atom = { 0 };
2370

    
2371
    mov->fc = s;
2372
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2373
    if(!url_is_streamed(pb))
2374
        atom.size = url_fsize(pb);
2375
    else
2376
        atom.size = INT64_MAX;
2377

    
2378
    /* check MOV header */
2379
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2380
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2381
        return err;
2382
    }
2383
    if (!mov->found_moov) {
2384
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2385
        return -1;
2386
    }
2387
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2388

    
2389
    if (!url_is_streamed(pb) && mov->chapter_track > 0)
2390
        mov_read_chapters(s);
2391

    
2392
    return 0;
2393
}
2394

    
2395
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2396
{
2397
    AVIndexEntry *sample = NULL;
2398
    int64_t best_dts = INT64_MAX;
2399
    int i;
2400
    for (i = 0; i < s->nb_streams; i++) {
2401
        AVStream *avst = s->streams[i];
2402
        MOVStreamContext *msc = avst->priv_data;
2403
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2404
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2405
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2406
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2407
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2408
                (!url_is_streamed(s->pb) &&
2409
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2410
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2411
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2412
                sample = current_sample;
2413
                best_dts = dts;
2414
                *st = avst;
2415
            }
2416
        }
2417
    }
2418
    return sample;
2419
}
2420

    
2421
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2422
{
2423
    MOVContext *mov = s->priv_data;
2424
    MOVStreamContext *sc;
2425
    AVIndexEntry *sample;
2426
    AVStream *st = NULL;
2427
    int ret;
2428
 retry:
2429
    sample = mov_find_next_sample(s, &st);
2430
    if (!sample) {
2431
        mov->found_mdat = 0;
2432
        if (!url_is_streamed(s->pb) ||
2433
            mov_read_default(mov, s->pb, (MOVAtom){ 0, INT64_MAX }) < 0 ||
2434
            url_feof(s->pb))
2435
            return AVERROR_EOF;
2436
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2437
        goto retry;
2438
    }
2439
    sc = st->priv_data;
2440
    /* must be done just before reading, to avoid infinite loop on sample */
2441
    sc->current_sample++;
2442

    
2443
    if (st->discard != AVDISCARD_ALL) {
2444
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2445
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2446
                   sc->ffindex, sample->pos);
2447
            return -1;
2448
        }
2449
        ret = av_get_packet(sc->pb, pkt, sample->size);
2450
        if (ret < 0)
2451
            return ret;
2452
#if CONFIG_DV_DEMUXER
2453
        if (mov->dv_demux && sc->dv_audio_container) {
2454
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2455
            av_free(pkt->data);
2456
            pkt->size = 0;
2457
            ret = dv_get_packet(mov->dv_demux, pkt);
2458
            if (ret < 0)
2459
                return ret;
2460
        }
2461
#endif
2462
    }
2463

    
2464
    pkt->stream_index = sc->ffindex;
2465
    pkt->dts = sample->timestamp;
2466
    if (sc->ctts_data) {
2467
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2468
        /* update ctts context */
2469
        sc->ctts_sample++;
2470
        if (sc->ctts_index < sc->ctts_count &&
2471
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2472
            sc->ctts_index++;
2473
            sc->ctts_sample = 0;
2474
        }
2475
        if (sc->wrong_dts)
2476
            pkt->dts = AV_NOPTS_VALUE;
2477
    } else {
2478
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2479
            st->index_entries[sc->current_sample].timestamp : st->duration;
2480
        pkt->duration = next_dts - pkt->dts;
2481
        pkt->pts = pkt->dts;
2482
    }
2483
    if (st->discard == AVDISCARD_ALL)
2484
        goto retry;
2485
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2486
    pkt->pos = sample->pos;
2487
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2488
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2489
    return 0;
2490
}
2491

    
2492
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2493
{
2494
    MOVStreamContext *sc = st->priv_data;
2495
    int sample, time_sample;
2496
    int i;
2497

    
2498
    sample = av_index_search_timestamp(st, timestamp, flags);
2499
    dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2500
    if (sample < 0) /* not sure what to do */
2501
        return -1;
2502
    sc->current_sample = sample;
2503
    dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2504
    /* adjust ctts index */
2505
    if (sc->ctts_data) {
2506
        time_sample = 0;
2507
        for (i = 0; i < sc->ctts_count; i++) {
2508
            int next = time_sample + sc->ctts_data[i].count;
2509
            if (next > sc->current_sample) {
2510
                sc->ctts_index = i;
2511
                sc->ctts_sample = sc->current_sample - time_sample;
2512
                break;
2513
            }
2514
            time_sample = next;
2515
        }
2516
    }
2517
    return sample;
2518
}
2519

    
2520
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2521
{
2522
    AVStream *st;
2523
    int64_t seek_timestamp, timestamp;
2524
    int sample;
2525
    int i;
2526

    
2527
    if (stream_index >= s->nb_streams)
2528
        return -1;
2529
    if (sample_time < 0)
2530
        sample_time = 0;
2531

    
2532
    st = s->streams[stream_index];
2533
    sample = mov_seek_stream(s, st, sample_time, flags);
2534
    if (sample < 0)
2535
        return -1;
2536

    
2537
    /* adjust seek timestamp to found sample timestamp */
2538
    seek_timestamp = st->index_entries[sample].timestamp;
2539

    
2540
    for (i = 0; i < s->nb_streams; i++) {
2541
        st = s->streams[i];
2542
        if (stream_index == i)
2543
            continue;
2544

    
2545
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2546
        mov_seek_stream(s, st, timestamp, flags);
2547
    }
2548
    return 0;
2549
}
2550

    
2551
static int mov_read_close(AVFormatContext *s)
2552
{
2553
    MOVContext *mov = s->priv_data;
2554
    int i, j;
2555

    
2556
    for (i = 0; i < s->nb_streams; i++) {
2557
        AVStream *st = s->streams[i];
2558
        MOVStreamContext *sc = st->priv_data;
2559

    
2560
        av_freep(&sc->ctts_data);
2561
        for (j = 0; j < sc->drefs_count; j++) {
2562
            av_freep(&sc->drefs[j].path);
2563
            av_freep(&sc->drefs[j].dir);
2564
        }
2565
        av_freep(&sc->drefs);
2566
        if (sc->pb && sc->pb != s->pb)
2567
            url_fclose(sc->pb);
2568

    
2569
        av_freep(&st->codec->palctrl);
2570
    }
2571

    
2572
    if (mov->dv_demux) {
2573
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2574
            av_freep(&mov->dv_fctx->streams[i]->codec);
2575
            av_freep(&mov->dv_fctx->streams[i]);
2576
        }
2577
        av_freep(&mov->dv_fctx);
2578
        av_freep(&mov->dv_demux);
2579
    }
2580

    
2581
    av_freep(&mov->trex_data);
2582

    
2583
    return 0;
2584
}
2585

    
2586
AVInputFormat mov_demuxer = {
2587
    "mov,mp4,m4a,3gp,3g2,mj2",
2588
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2589
    sizeof(MOVContext),
2590
    mov_probe,
2591
    mov_read_header,
2592
    mov_read_packet,
2593
    mov_read_close,
2594
    mov_read_seek,
2595
};