r8b::CDSPFracDelayFilterBank Class Reference

Sinc function-based fractional delay filter bank class. More...

#include <CDSPFracInterpolator.h>

Inheritance diagram for r8b::CDSPFracDelayFilterBank:

Collaboration diagram for r8b::CDSPFracDelayFilterBank:

Public Member Functions
	CDSPFracDelayFilterBank (const int aFilterFracs, const int aElementSize, const int aInterpPoints, const double aReqAtten, const bool aIsThird)
	Constructor. More...
int	getFilterLen () const
	Function returns the length of the filter.
int	getFilterFracs () const
	Function returns the number of fractional positions sampled by the bank.
const double &	operator[] (const int i) const
void	unref ()
	This function should be called when the filter obtained via the filter bank cache is no longer needed.

Static Public Member Functions
static void	roundReqAtten (double &att, const bool aIsThird)
	Function "rounds" the specified attenuation to the nearest effective value. More...

Friends
class	CDSPFracDelayFilterBankCache

Detailed Description

Sinc function-based fractional delay filter bank class.

Class implements storage and initialization of a bank of sinc-based fractional delay filters, expressed as 0th, 1st, 2nd or 3rd order polynomial interpolation coefficients. The filters are windowed by the "Kaiser" power-raised window function.

Constructor & Destructor Documentation

CDSPFracDelayFilterBank()

r8b::CDSPFracDelayFilterBank::CDSPFracDelayFilterBank ( const int  aFilterFracs, const int  aElementSize, const int  aInterpPoints, const double  aReqAtten, const bool  aIsThird  )

inline

Constructor.

Parameters

aFilterFracs	The number of fractional delay positions to sample, -1 - use default.
aElementSize	The size of each filter's tap, in "double" values. This parameter corresponds to the complexity of interpolation. 4 should be set for 3rd order, 3 for 2nd order, 2 for linear interpolation, 1 for whole-numbered stepping.
aInterpPoints	The number of points the interpolation is based on. This value should not be confused with the ElementSize. Set to 2 for linear or no interpolation.
aReqAtten	Required filter attentuation.
aIsThird	"True" if one-third filter is required.

Member Function Documentation

operator[]()

const double& r8b::CDSPFracDelayFilterBank::operator[] ( const int  i ) const

inline

Parameters

i	Filter index, in the range 0 to FilterFracs, inclusive.

Returns

Reference to the filter.

roundReqAtten()

static void r8b::CDSPFracDelayFilterBank::roundReqAtten ( double &  att, const bool  aIsThird  )

inlinestatic

Function "rounds" the specified attenuation to the nearest effective value.

Parameters

[in,out]	att	Required filter attentuation. Will be rounded to the nearest value.
	aIsThird	"True" if one-third filter is required.

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

• src/r8brain/CDSPFracInterpolator.h