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
38 #define SINEWIN_SUFFIX(a) a ## _fixed
41 #define SINEWIN_SUFFIX(a) a
42 #define INTFLOAT float
45 #define SINETABLE(size) \
46 SINETABLE_CONST DECLARE_ALIGNED(32, INTFLOAT, SINEWIN_SUFFIX(ff_sine_##size))[size]
49 * Generate a sine window.
50 * @param window pointer to half window
51 * @param n size of half window
53 void SINEWIN_SUFFIX(ff_sine_window_init)(INTFLOAT *window, int n);
56 * initialize the specified entry of ff_sine_windows
58 void SINEWIN_SUFFIX(ff_init_ff_sine_windows)(int index);
60 extern SINETABLE( 32);
61 extern SINETABLE( 64);
62 extern SINETABLE( 128);
63 extern SINETABLE( 256);
64 extern SINETABLE( 512);
65 extern SINETABLE(1024);
66 extern SINETABLE(2048);
67 extern SINETABLE(4096);
68 extern SINETABLE(8192);
70 extern SINETABLE_CONST INTFLOAT * const SINEWIN_SUFFIX(ff_sine_windows)[14];
72 #endif /* AVCODEC_SINEWIN_H */