AAFilter Class Reference

#include <AAFilter.h>

List of all members.

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Detailed Description

Definition at line 50 of file AAFilter.h.

Public Member Functions
	AAFilter (uint length)
	~AAFilter ()
void	setCutoffFreq (double newCutoffFreq)
	Sets new anti-alias filter cut-off edge frequency, scaled to sampling frequency (nyquist frequency = 0.5).
void	setLength (uint newLength)
	Sets number of FIR filter taps, i.e. ~filter complexity.
uint	getLength () const
uint	evaluate (soundtouch::SAMPLETYPE *dest, const soundtouch::SAMPLETYPE *src, uint numSamples, uint numChannels) const
	Applies the filter to the given sequence of samples.
Protected Member Functions
void	calculateCoeffs ()
	Calculate the FIR coefficients realizing the given cutoff-frequency.
Protected Attributes
class FIRFilter *	pFIR
double	cutoffFreq
	Low-pass filter cut-off frequency, negative = invalid.
uint	length
	num of filter taps

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Constructor & Destructor Documentation

AAFilter::AAFilter

(

uint

length

)

Definition at line 61 of file AAFilter.cpp.

AAFilter::~AAFilter

(

)

Definition at line 70 of file AAFilter.cpp.

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Member Function Documentation

void AAFilter::calculateCoeffs

(

)

[protected]

Calculate the FIR coefficients realizing the given cutoff-frequency.

Definition at line 98 of file AAFilter.cpp.

Referenced by setCutoffFreq(), and setLength().

void AAFilter::setCutoffFreq

(

double

newCutoffFreq

)

Sets new anti-alias filter cut-off edge frequency, scaled to sampling frequency (nyquist frequency = 0.5).

The filter will cut off the frequencies than that.

Definition at line 80 of file AAFilter.cpp.

Referenced by soundtouch::RateTransposer::setRate().

void AAFilter::setLength

(

uint

newLength

)

Sets number of FIR filter taps, i.e. ~filter complexity.

Definition at line 89 of file AAFilter.cpp.

Referenced by AAFilter(), and soundtouch::SoundTouch::setSetting().

uint AAFilter::getLength

(

)

const

Definition at line 181 of file AAFilter.cpp.

Referenced by soundtouch::SoundTouch::getSetting().

uint AAFilter::evaluate	(	soundtouch::SAMPLETYPE *	dest,
		const soundtouch::SAMPLETYPE *	src,
		uint	numSamples,
		uint	numChannels
	)			const

Applies the filter to the given sequence of samples.

Note : The amount of outputted samples is by value of 'filter length' smaller than the amount of input samples.

Definition at line 175 of file AAFilter.cpp.

Referenced by soundtouch::RateTransposer::downsample(), and soundtouch::RateTransposer::upsample().

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Member Data Documentation

class FIRFilter* AAFilter::pFIR [protected]

Definition at line 53 of file AAFilter.h.

Referenced by AAFilter(), calculateCoeffs(), evaluate(), getLength(), and ~AAFilter().

double AAFilter::cutoffFreq [protected]

Low-pass filter cut-off frequency, negative = invalid.

Definition at line 56 of file AAFilter.h.

Referenced by AAFilter(), calculateCoeffs(), and setCutoffFreq().

uint AAFilter::length [protected]

num of filter taps

Definition at line 59 of file AAFilter.h.

Referenced by calculateCoeffs(), and setLength().

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The documentation for this class was generated from the following files:

• AAFilter.h
• AAFilter.cpp