1 /* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2006,2007 Josh Coalson 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of the Xiph.org Foundation nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef FLAC__PRIVATE__WINDOW_H 33 #define FLAC__PRIVATE__WINDOW_H 34 35 #ifdef HAVE_CONFIG_H 36 #include <config.h> 37 #endif 38 39 #include "private/float.h" 40 #include "FLAC/format.h" 41 42 #ifndef FLAC__INTEGER_ONLY_LIBRARY 43 44 /* 45 * FLAC__window_*() 46 * -------------------------------------------------------------------- 47 * Calculates window coefficients according to different apodization 48 * functions. 49 * 50 * OUT window[0,L-1] 51 * IN L (number of points in window) 52 */ 53 void FLAC__window_bartlett(FLAC__real *window, const FLAC__int32 L); 54 void FLAC__window_bartlett_hann(FLAC__real *window, const FLAC__int32 L); 55 void FLAC__window_blackman(FLAC__real *window, const FLAC__int32 L); 56 void FLAC__window_blackman_harris_4term_92db_sidelobe(FLAC__real *window, const FLAC__int32 L); 57 void FLAC__window_connes(FLAC__real *window, const FLAC__int32 L); 58 void FLAC__window_flattop(FLAC__real *window, const FLAC__int32 L); 59 void FLAC__window_gauss(FLAC__real *window, const FLAC__int32 L, const FLAC__real stddev); /* 0.0 < stddev <= 0.5 */ 60 void FLAC__window_hamming(FLAC__real *window, const FLAC__int32 L); 61 void FLAC__window_hann(FLAC__real *window, const FLAC__int32 L); 62 void FLAC__window_kaiser_bessel(FLAC__real *window, const FLAC__int32 L); 63 void FLAC__window_nuttall(FLAC__real *window, const FLAC__int32 L); 64 void FLAC__window_rectangle(FLAC__real *window, const FLAC__int32 L); 65 void FLAC__window_triangle(FLAC__real *window, const FLAC__int32 L); 66 void FLAC__window_tukey(FLAC__real *window, const FLAC__int32 L, const FLAC__real p); 67 void FLAC__window_welch(FLAC__real *window, const FLAC__int32 L); 68 69 #endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */ 70 71 #endif 72