SPUC::lagrange< Numeric > Class Template Reference
[FIR filters, Interpolation filters]

Template Class for Lagrange interpolation using a FIR filter. More...

#include <lagrange.h>

Collaboration diagram for SPUC::lagrange< Numeric >:

[legend]List of all members.

Public Member Functions
void	reset ()
Numeric	out ()
	Get current output.
Numeric	check (long i)
	Clock in new sample & compute current output.
	lagrange (void)
	lagrange (long n)
	Constructor.
	~lagrange (void)
	Destructor.
void	set_size (long n)
	Set order of polynomial.
void	input (Numeric in)
	Input new sample (do nothing else).
Numeric	update (Numeric in, double offset)
Numeric	fir (void)
	Calculate output for current coefficients.
Numeric	rephase (double offset)
	Rephase => recalculate coefficients and output for new offset (for upsampling).
void	calculate_coeff (double offset)
	Calculate coefficients given an offset.
void	print ()
	Print out coefficients.
Public Attributes
long	num_taps
double *	coeff
Protected Attributes
Numeric *	z
Numeric	output

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Detailed Description

template<class Numeric>
class SPUC::lagrange< Numeric >

Template Class for Lagrange interpolation using a FIR filter.

: Template Lagrange interpolation via FIR Fitler This works best for double or complex<double> Coefficients are always real (i.e. no imaginary parts).

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Constructor & Destructor Documentation

template<class Numeric> SPUC::lagrange< Numeric >::lagrange (  void   )  [inline]

template<class Numeric> SPUC::lagrange< Numeric >::lagrange (  long  n  )  [inline]

Constructor.

template<class Numeric> SPUC::lagrange< Numeric >::~lagrange (  void   )  [inline]

Destructor.

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Member Function Documentation

template<class Numeric> void SPUC::lagrange< Numeric >::calculate_coeff (  double  offset  )  [inline]

Calculate coefficients given an offset.

template<class Numeric> Numeric SPUC::lagrange< Numeric >::check (  long  i  )  [inline]

Clock in new sample & compute current output.

template<class Numeric> Numeric SPUC::lagrange< Numeric >::fir (  void   )  [inline]

Calculate output for current coefficients.

template<class Numeric> void SPUC::lagrange< Numeric >::input (  Numeric  in  )  [inline]

Input new sample (do nothing else).

template<class Numeric> Numeric SPUC::lagrange< Numeric >::out (   )  [inline]

Get current output.

template<class Numeric> void SPUC::lagrange< Numeric >::print (  void   )  [inline]

Print out coefficients.

template<class Numeric> Numeric SPUC::lagrange< Numeric >::rephase (  double  offset  )  [inline]

Rephase => recalculate coefficients and output for new offset (for upsampling).

template<class Numeric> void SPUC::lagrange< Numeric >::reset (  void   )  [inline]

template<class Numeric> void SPUC::lagrange< Numeric >::set_size (  long  n  )  [inline]

Set order of polynomial.

template<class Numeric> Numeric SPUC::lagrange< Numeric >::update (  Numeric  in, double  offset )  [inline]

Update => Clock in new input sample, recalculate coefficients and determine output

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Member Data Documentation

template<class Numeric> double* SPUC::lagrange< Numeric >::coeff

template<class Numeric> long SPUC::lagrange< Numeric >::num_taps

template<class Numeric> Numeric SPUC::lagrange< Numeric >::output [protected]

template<class Numeric> Numeric* SPUC::lagrange< Numeric >::z [protected]

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

• generic/lagrange.h

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