/******************************************************************************/
/* fir2.h */
/******************************************************************************/
#ifndef FIR_H
#define FIR_H

#ifndef fir_pi
#define	fir_pi			3.1415926535897932384626433832795
#endif
#ifndef fir_float_t
#define fir_float_t float
#endif


#if defined(__cplusplus)
extern "C" {
#endif
/******************************************************************************/
fir_float_t Sinc(fir_float_t x);
void CalcSincFilter(fir_float_t *pY, fir_float_t s, fir_float_t f, int len);
void FIRCalcLowpass(fir_float_t omega, fir_float_t *pCoeff, int N);
void FIRCalcHighpass(fir_float_t omega, fir_float_t *pCoeff, int N);
void FIRCalcBandpass(fir_float_t omega, fir_float_t bw, fir_float_t *pCoeff, int N);
void FIR(fir_float_t *pCoeff, fir_float_t *pState, int order, fir_float_t *x, fir_float_t *y, int len);
void FIR_upsample(fir_float_t *pCoeff, fir_float_t *pState, int order, fir_float_t *x, fir_float_t *y, int upsample_factor, int len);
void FIR_downsample(fir_float_t *pCoeff, fir_float_t *pState, int order, fir_float_t *x, fir_float_t *y, int downsample_factor, int len);
void CalcHamming(fir_float_t *pX, fir_float_t *pY, int len);
void CalcVonHann(fir_float_t *pX, fir_float_t *pY, int len);
void CalcBlackman(fir_float_t *pX, fir_float_t *pY, int len);
void CalcKaiser(fir_float_t *pX, fir_float_t *pY, fir_float_t b, int len);
void CalcKaiserSR(fir_float_t *pX, fir_float_t *pY, fir_float_t b, int len);

fir_float_t CalcFirRC(fir_float_t *pB, fir_float_t fa, fir_float_t Tsym, fir_float_t Alpha, int N);
fir_float_t CalcFirSRRC(fir_float_t *pB, fir_float_t fa, fir_float_t Tsym, fir_float_t Alpha, int N);

/******************************************************************************/
#if defined(__cplusplus)
}
#endif

#endif /* FIR_H */