1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* WavPack shared functions
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "wv.h"
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
{
memset(wv, 0, sizeof(*wv));
if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k'))
return AVERROR_INVALIDDATA;
wv->blocksize = AV_RL32(data + 4);
if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT)
return AVERROR_INVALIDDATA;
wv->blocksize -= 24;
wv->version = AV_RL16(data + 8);
wv->total_samples = AV_RL32(data + 12);
wv->block_idx = AV_RL32(data + 16);
wv->samples = AV_RL32(data + 20);
wv->flags = AV_RL32(data + 24);
wv->crc = AV_RL32(data + 28);
wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK);
wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK);
return 0;
}
|
