Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / sinewin_tablegen.h
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2ba45a60
DM
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
34SINETABLE( 32);
35SINETABLE( 64);
36SINETABLE( 128);
37SINETABLE( 256);
38SINETABLE( 512);
39SINETABLE(1024);
40SINETABLE(2048);
41SINETABLE(4096);
42SINETABLE(8192);
43#else
44#include "libavcodec/sinewin_tables.h"
45#endif
46
47SINETABLE_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.
54av_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
60av_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 */