filter.c File Reference

#include <string.h>
#include <math.h>
#include "dsp.h"

Functions
float	fir (register unsigned int n, float *w, float *x)
float *	pfir (unsigned int n, unsigned int d, unsigned int xi, float **w, float **x, float *y, unsigned int s)
int	updatepq (unsigned int n, unsigned int d, unsigned int xi, float **xq, float *in, unsigned int s)
int	design_fir (unsigned int n, float *w, float *fc, unsigned int flags, float opt)
int	design_pfir (unsigned int n, unsigned int k, float *w, float **pw, float g, unsigned int flags)
void	prewarp (float *a, float fc, float fs)
void	bilinear (float *a, float *b, float *k, float fs, float *coef)
int	szxform (const float *a, const float *b, float Q, float fc, float fs, float *k, float *coef)

Function Documentation

bilinear()

void bilinear	(	float *	a,
		float *	b,
		float *	k,
		float	fs,
		float *	coef
	)

References _ftype_t.

Referenced by szxform().

design_fir()

int design_fir	(	unsigned int	n,
		float *	w,
		float *	fc,
		unsigned int	flags,
		float	opt
	)

References _ftype_t, BLACKMAN, blackman(), boxcar(), BOXCAR, BP, BS, FLATTOP, flattop(), HAMMING, hamming(), HANNING, hanning(), HP, KAISER, kaiser(), LP, TRIANG, triang(), and WINDOW_MASK.

design_pfir()

int design_pfir	(	unsigned int	n,
		unsigned int	k,
		float *	w,
		float **	pw,
		float	g,
		unsigned int	flags
	)

References _ftype_t, ODD, and REW.

fir()

float fir ( register unsigned int  n, float *  w, float *  x  )

inline

References _ftype_t.

Referenced by pfir().

pfir()

float* pfir ( unsigned int  n, unsigned int  d, unsigned int  xi, float **  w, float **  x, float *  y, unsigned int  s  )

inline

References _ftype_t, and fir().

prewarp()

void prewarp	(	float *	a,
		float	fc,
		float	fs
	)

References _ftype_t.

Referenced by szxform().

szxform()

int szxform	(	const float *	a,
		const float *	b,
		float	Q,
		float	fc,
		float	fs,
		float *	k,
		float *	coef
	)

References _ftype_t, bilinear(), prewarp(), and Q.

Referenced by upmix_port_open(), and upmix_port_put_buffer().

updatepq()

int updatepq ( unsigned int  n, unsigned int  d, unsigned int  xi, float **  xq, float *  in, unsigned int  s  )

inline

References _ftype_t.