1 /* 2 * Copyright (c) 2008 Robert Swain 3 * 4 * This file is part of FFmpeg. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21 #ifndef AVCODEC_SINEWIN_H 22 #define AVCODEC_SINEWIN_H 23 24 #include "config.h" 25 #include "libavutil/mem_internal.h" 26 27 #if CONFIG_HARDCODED_TABLES 28 # define SINETABLE_CONST const 29 #else 30 # define SINETABLE_CONST 31 #endif 32 33 #define SINETABLE(size) \ 34 SINETABLE_CONST DECLARE_ALIGNED(32, float, ff_sine_##size)[size] 35 36 /** 37 * Generate a sine window. 38 * @param window pointer to half window 39 * @param n size of half window 40 */ 41 void ff_sine_window_init(float *window, int n); 42 43 /** 44 * initialize the specified entry of ff_sine_windows 45 */ 46 void ff_init_ff_sine_windows(int index); 47 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); 57 58 extern SINETABLE_CONST float *const ff_sine_windows[]; 59 60 #endif /* AVCODEC_SINEWIN_H */ 61