biquad_filter.h File Reference

Go to the source code of this file.

Data Structures
struct	BiquadFilter_s

Macros
#define	BIQUAD_MIN_RATIO   (0.000001)
#define	BIQUAD_MIN_Q   (0.00001)

Typedefs
typedef struct BiquadFilter_s	BiquadFilter

Functions
void	BiquadFilter_SetupHighPass (BiquadFilter *filter, double ratio, double Q)
void	BiquadFilter_SetupNotch (BiquadFilter *filter, double ratio, double Q)
void	BiquadFilter_Filter (BiquadFilter *filter, float *inputs, float *outputs, int numSamples)

Macro Definition Documentation

BIQUAD_MIN_Q

#define BIQUAD_MIN_Q   (0.00001)

Referenced by BiquadFilter_SetupHighPass(), and BiquadFilter_SetupNotch().

BIQUAD_MIN_RATIO

#define BIQUAD_MIN_RATIO   (0.000001)

Unit_BiquadFilter implements a second order IIR filter.

Author

(C) 2002 Phil Burk, SoftSynth.com, All Rights Reserved

Referenced by BiquadFilter_SetupHighPass(), and BiquadFilter_SetupNotch().

Typedef Documentation

BiquadFilter

typedef struct BiquadFilter_s BiquadFilter

Function Documentation

BiquadFilter_Filter()

void BiquadFilter_Filter	(	BiquadFilter *	filter,
		float *	inputs,
		float *	outputs,
		int	numSamples )

References BiquadFilter_s::a0, BiquadFilter_s::a1, BiquadFilter_s::a2, BiquadFilter_s::b1, BiquadFilter_s::b2, BiquadFilter_s::xn1, BiquadFilter_s::xn2, BiquadFilter_s::yn1, and BiquadFilter_s::yn2.

Referenced by PaQa_FilterRecording().

BiquadFilter_SetupHighPass()

void BiquadFilter_SetupHighPass	(	BiquadFilter *	filter,
		double	ratio,
		double	Q )

References BiquadFilter_s::a0, BiquadFilter_s::a1, BiquadFilter_s::a2, BiquadFilter_s::alpha, BiquadFilter_s::b1, BiquadFilter_s::b2, BIQUAD_MIN_Q, BIQUAD_MIN_RATIO, and BiquadFilter_s::cos_omega.

Referenced by PaQa_DetectPop().

BiquadFilter_SetupNotch()

void BiquadFilter_SetupNotch	(	BiquadFilter *	filter,
		double	ratio,
		double	Q )

References BiquadFilter_s::a0, BiquadFilter_s::a1, BiquadFilter_s::a2, BiquadFilter_s::alpha, BiquadFilter_s::b1, BiquadFilter_s::b2, BIQUAD_MIN_Q, BIQUAD_MIN_RATIO, and BiquadFilter_s::cos_omega.

Referenced by PaQa_DetectPop().