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
aac_tablegen.h
Go to the documentation of this file.
1
/*
2
* Header file for hardcoded AAC tables
3
*
4
* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
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_AAC_TABLEGEN_H
24
#define AVCODEC_AAC_TABLEGEN_H
25
26
#include "
aac_tablegen_decl.h
"
27
28
#if CONFIG_HARDCODED_TABLES
29
#include "libavcodec/aac_tables.h"
30
#else
31
#include "
libavutil/mathematics.h
"
32
float
ff_aac_pow2sf_tab
[428];
33
float
ff_aac_pow34sf_tab
[428];
34
35
av_cold
void
ff_aac_tableinit
(
void
)
36
{
37
int
i;
38
for
(i = 0; i < 428; i++) {
39
ff_aac_pow2sf_tab
[i] = pow(2, (i -
POW_SF2_ZERO
) / 4.0);
40
ff_aac_pow34sf_tab
[i] = pow(
ff_aac_pow2sf_tab
[i], 3.0/4.0);
41
}
42
}
43
#endif
/* CONFIG_HARDCODED_TABLES */
44
45
#endif
/* AVCODEC_AAC_TABLEGEN_H */
aac_tablegen_decl.h
mathematics.h
av_cold
#define av_cold
Definition:
attributes.h:82
ff_aac_pow34sf_tab
float ff_aac_pow34sf_tab[428]
Definition:
aac_tablegen.h:33
ff_aac_tableinit
av_cold void ff_aac_tableinit(void)
Definition:
aac_tablegen.h:35
ff_aac_pow2sf_tab
float ff_aac_pow2sf_tab[428]
Definition:
aac_tablegen.h:32
POW_SF2_ZERO
#define POW_SF2_ZERO
ff_aac_pow2sf_tab index corresponding to pow(2, 0);
Definition:
aac.h:154
Generated on Mon Aug 1 2016 19:20:37 for FFmpeg by
1.8.6