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 */ 41void ff_sine_window_init(float *window, int n); 42 43/** 44 * initialize the specified entry of ff_sine_windows 45 */ 46void ff_init_ff_sine_windows(int index); 47 48extern SINETABLE( 32); 49extern SINETABLE( 64); 50extern SINETABLE( 128); 51extern SINETABLE( 256); 52extern SINETABLE( 512); 53extern SINETABLE(1024); 54extern SINETABLE(2048); 55extern SINETABLE(4096); 56extern SINETABLE(8192); 57 58extern SINETABLE_CONST float *const ff_sine_windows[]; 59 60#endif /* AVCODEC_SINEWIN_H */ 61