1
by Sérgio Benjamim
FFmpeg 2.7.1 source for ppsspp. |
1 |
/*
|
2 |
* Header file for hardcoded sine windows
|
|
3 |
*
|
|
4 |
* Copyright (c) 2009 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_SINEWIN_TABLEGEN_H
|
|
24 |
#define AVCODEC_SINEWIN_TABLEGEN_H
|
|
25 |
||
26 |
#include <assert.h> |
|
27 |
// do not use libavutil/libm.h since this is compiled both
|
|
28 |
// for the host and the target and config.h is only valid for the target
|
|
29 |
#include <math.h> |
|
30 |
#include "libavutil/attributes.h" |
|
31 |
#include "libavutil/common.h" |
|
32 |
||
33 |
#if !CONFIG_HARDCODED_TABLES
|
|
34 |
SINETABLE( 32); |
|
35 |
SINETABLE( 64); |
|
36 |
SINETABLE( 128); |
|
37 |
SINETABLE( 256); |
|
38 |
SINETABLE( 512); |
|
39 |
SINETABLE(1024); |
|
40 |
SINETABLE(2048); |
|
41 |
SINETABLE(4096); |
|
42 |
SINETABLE(8192); |
|
43 |
#else
|
|
44 |
#include "libavcodec/sinewin_tables.h" |
|
45 |
#endif
|
|
46 |
||
47 |
SINETABLE_CONST float * const ff_sine_windows[] = { |
|
48 |
NULL, NULL, NULL, NULL, NULL, // unused |
|
49 |
ff_sine_32 , ff_sine_64 , |
|
50 |
ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192 |
|
51 |
};
|
|
52 |
||
53 |
// Generate a sine window.
|
|
54 |
av_cold void ff_sine_window_init(float *window, int n) { |
|
55 |
int i; |
|
56 |
for(i = 0; i < n; i++) |
|
57 |
window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n))); |
|
58 |
}
|
|
59 |
||
60 |
av_cold void ff_init_ff_sine_windows(int index) { |
|
61 |
assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows)); |
|
62 |
#if !CONFIG_HARDCODED_TABLES
|
|
63 |
ff_sine_window_init(ff_sine_windows[index], 1 << index); |
|
64 |
#endif
|
|
65 |
}
|
|
66 |
||
67 |
#endif /* AVCODEC_SINEWIN_TABLEGEN_H */ |