window.h

来自「linux下的MPEG1」· C头文件 代码 · 共 34 行

/*=============================================================================
 *	
 *  This software has been released under the terms of the GNU Public
 *  license. See http://www.gnu.org/copyleft/gpl.html for details.
 *
 *  Copyright 2001 Anders Johansson [e-mail]
 *
 *=============================================================================
 */

/* Calculates a number of window functions. The following window
 * functions are currently implemented: Boxcar, Triang, Hanning,
 * Hamming, Blackman, Flattop and Kaiser. In the function call n is
 * the number of filter taps and w the buffer in which the filter
 * coefficients will be stored.
 */

#if !defined _DSP_H
# error "Never use <window.h> directly; include <dsp.h> instead"
#endif

#ifndef _WINDOW_H
#define _WINDOW_H	1

extern void boxcar(int n, _ftype_t* w);
extern void triang(int n, _ftype_t* w);
extern void hanning(int n, _ftype_t* w);
extern void hamming(int n,_ftype_t* w);
extern void blackman(int n,_ftype_t* w);
extern void flattop(int n,_ftype_t* w);
extern void kaiser(int n, _ftype_t* w,_ftype_t b);

#endif