FFmpeg
Main Page
Related Pages
Modules
Namespaces
Data Structures
Files
Examples
File List
Globals
All
Data Structures
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
libavcodec
cbrt_tablegen.h
Go to the documentation of this file.
1
/*
2
* Header file for hardcoded AAC cube-root table
3
*
4
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5
*
6
* This file is part of FFmpeg.
7
*
8
* FFmpeg is free software; you can redistribute it and/or
9
* modify it under the terms of the GNU Lesser General Public
10
* License as published by the Free Software Foundation; either
11
* version 2.1 of the License, or (at your option) any later version.
12
*
13
* FFmpeg is distributed in the hope that it will be useful,
14
* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
* Lesser General Public License for more details.
17
*
18
* You should have received a copy of the GNU Lesser General Public
19
* License along with FFmpeg; if not, write to the Free Software
20
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
*/
22
23
#ifndef AVCODEC_CBRT_TABLEGEN_H
24
#define AVCODEC_CBRT_TABLEGEN_H
25
26
#include <stdint.h>
27
#include <math.h>
28
29
#if CONFIG_HARDCODED_TABLES
30
#define cbrt_tableinit()
31
#include "libavcodec/cbrt_tables.h"
32
#else
33
static
uint32_t
cbrt_tab
[1 << 13];
34
35
static
void
cbrt_tableinit
(
void
)
36
{
37
if
(!
cbrt_tab
[(1<<13) - 1]) {
38
int
i;
39
for
(i = 0; i < 1<<13; i++) {
40
union
{
41
float
f;
42
uint32_t i;
43
} f;
44
f.f =
cbrtf
(i) * i;
45
cbrt_tab
[i] = f.i;
46
}
47
}
48
}
49
#endif
/* CONFIG_HARDCODED_TABLES */
50
51
#endif
/* AVCODEC_CBRT_TABLEGEN_H */
Generated on Wed Jul 10 2013 23:47:56 for FFmpeg by
1.8.2