Move ff_kbd_window_init() to a separate file
[libav.git] / libavcodec / sinewin_tablegen.h
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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <assert.h>
24 // do not use libavutil/libm.h since this is compiled both
25 // for the host and the target and config.h is only valid for the target
26 #include <math.h>
27 #include "libavutil/attributes.h"
28
29 #if !CONFIG_HARDCODED_TABLES
30 SINETABLE( 32);
31 SINETABLE( 64);
32 SINETABLE( 128);
33 SINETABLE( 256);
34 SINETABLE( 512);
35 SINETABLE(1024);
36 SINETABLE(2048);
37 SINETABLE(4096);
38 #else
39 #include "libavcodec/sinewin_tables.h"
40 #endif
41
42 SINETABLE_CONST float * const ff_sine_windows[] = {
43 NULL, NULL, NULL, NULL, NULL, // unused
44 ff_sine_32 , ff_sine_64 ,
45 ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096
46 };
47
48 // Generate a sine window.
49 av_cold void ff_sine_window_init(float *window, int n) {
50 int i;
51 for(i = 0; i < n; i++)
52 window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
53 }
54
55 av_cold void ff_init_ff_sine_windows(int index) {
56 assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows));
57 #if !CONFIG_HARDCODED_TABLES
58 ff_sine_window_init(ff_sine_windows[index], 1 << index);
59 #endif
60 }