2 * Copyright (c) 2008 Robert Swain
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_SINEWIN_H
22 #define AVCODEC_SINEWIN_H
25 #include "libavutil/mem.h"
27 #if CONFIG_HARDCODED_TABLES
28 # define SINETABLE_CONST const
30 # define SINETABLE_CONST
33 #define SINETABLE(size) \
34 SINETABLE_CONST DECLARE_ALIGNED(32, float, ff_sine_##size)[size]
37 * Generate a sine window.
38 * @param window pointer to half window
39 * @param n size of half window
41 void ff_sine_window_init(float *window, int n);
44 * initialize the specified entry of ff_sine_windows
46 void ff_init_ff_sine_windows(int index);
48 extern SINETABLE( 32);
49 extern SINETABLE( 64);
50 extern SINETABLE( 128);
51 extern SINETABLE( 256);
52 extern SINETABLE( 512);
53 extern SINETABLE(1024);
54 extern SINETABLE(2048);
55 extern SINETABLE(4096);
56 extern SINETABLE(8192);
58 extern SINETABLE_CONST float * const ff_sine_windows[14];
60 #endif /* AVCODEC_SINEWIN_H */