1 /* libFLAC - Free Lossless Audio Codec library
2  * Copyright (C) 2006-2009  Josh Coalson
3  * Copyright (C) 2011-2016  Xiph.Org Foundation
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * - Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * - Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in the
14  * documentation and/or other materials provided with the distribution.
15  *
16  * - Neither the name of the Xiph.org Foundation nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #ifndef FLAC__PRIVATE__WINDOW_H
34 #define FLAC__PRIVATE__WINDOW_H
35 
36 #ifdef HAVE_CONFIG_H
37 #include <config.h>
38 #endif
39 
40 #include "private/float.h"
41 #include "FLAC/format.h"
42 
43 #ifndef FLAC__INTEGER_ONLY_LIBRARY
44 
45 /*
46  *	FLAC__window_*()
47  *	--------------------------------------------------------------------
48  *	Calculates window coefficients according to different apodization
49  *	functions.
50  *
51  *	OUT window[0,L-1]
52  *	IN L (number of points in window)
53  */
54 void FLAC__window_bartlett(FLAC__real *window, const FLAC__int32 L);
55 void FLAC__window_bartlett_hann(FLAC__real *window, const FLAC__int32 L);
56 void FLAC__window_blackman(FLAC__real *window, const FLAC__int32 L);
57 void FLAC__window_blackman_harris_4term_92db_sidelobe(FLAC__real *window, const FLAC__int32 L);
58 void FLAC__window_connes(FLAC__real *window, const FLAC__int32 L);
59 void FLAC__window_flattop(FLAC__real *window, const FLAC__int32 L);
60 void FLAC__window_gauss(FLAC__real *window, const FLAC__int32 L, const FLAC__real stddev); /* 0.0 < stddev <= 0.5 */
61 void FLAC__window_hamming(FLAC__real *window, const FLAC__int32 L);
62 void FLAC__window_hann(FLAC__real *window, const FLAC__int32 L);
63 void FLAC__window_kaiser_bessel(FLAC__real *window, const FLAC__int32 L);
64 void FLAC__window_nuttall(FLAC__real *window, const FLAC__int32 L);
65 void FLAC__window_rectangle(FLAC__real *window, const FLAC__int32 L);
66 void FLAC__window_triangle(FLAC__real *window, const FLAC__int32 L);
67 void FLAC__window_tukey(FLAC__real *window, const FLAC__int32 L, const FLAC__real p);
68 void FLAC__window_partial_tukey(FLAC__real *window, const FLAC__int32 L, const FLAC__real p, const FLAC__real start, const FLAC__real end);
69 void FLAC__window_punchout_tukey(FLAC__real *window, const FLAC__int32 L, const FLAC__real p, const FLAC__real start, const FLAC__real end);
70 void FLAC__window_welch(FLAC__real *window, const FLAC__int32 L);
71 
72 #endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
73 
74 #endif
75