gri_fir_filter_with_buffer_fff Class Reference

FIR with internal buffer for float input, float output and float taps. More...

#include <gri_fir_filter_with_buffer_fff.h>

List of all members.

Public Member Functions
	gri_fir_filter_with_buffer_fff (const std::vector< float > &taps)
	construct new FIR with given taps.
	~gri_fir_filter_with_buffer_fff ()
float	filter (float input)
	compute a single output value.
float	filter (const float input[], unsigned long dec)
	compute a single output value; designed for decimating filters.
void	filterN (float output[], const float input[], unsigned long n)
	compute an array of N output values.
void	filterNdec (float output[], const float input[], unsigned long n, unsigned long decimate)
	compute an array of N output values, decimating the input
void	set_taps (const std::vector< float > &taps)
	install new_taps as the current taps.
unsigned	ntaps () const
const std::vector< float >	get_taps () const
Protected Attributes
std::vector< float >	d_taps
float *	d_buffer
unsigned int	d_idx

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Detailed Description

FIR with internal buffer for float input, float output and float taps.

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Constructor & Destructor Documentation

gri_fir_filter_with_buffer_fff::gri_fir_filter_with_buffer_fff

(

const std::vector< float > &

taps

)

construct new FIR with given taps.

Note that taps must be in forward order, e.g., coefficient 0 is stored in new_taps[0], coefficient 1 is stored in new_taps[1], etc.

gri_fir_filter_with_buffer_fff::~gri_fir_filter_with_buffer_fff

(

)

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Member Function Documentation

float gri_fir_filter_with_buffer_fff::filter

(

float

input

)

compute a single output value.

input is a single input value of the filter type

Returns:

the filtered input value.

float gri_fir_filter_with_buffer_fff::filter	(	const float	input[],
		unsigned long	dec
	)

compute a single output value; designed for decimating filters.

input is a single input value of the filter type. The value of dec is the decimating value of the filter, so input[] must have dec valid values. The filter pushes dec number of items onto the circ. buffer before computing a single output.

Returns:

the filtered input value.

void gri_fir_filter_with_buffer_fff::filterN	(	float	output[],
		const float	input[],
		unsigned long	n
	)

compute an array of N output values.

input must have (n - 1 + ntaps()) valid entries. input[0] .. input[n - 1 + ntaps() - 1] are referenced to compute the output values.

void gri_fir_filter_with_buffer_fff::filterNdec	(	float	output[],
		const float	input[],
		unsigned long	n,
		unsigned long	decimate
	)

compute an array of N output values, decimating the input

input must have (decimate * (n - 1) + ntaps()) valid entries. input[0] .. input[decimate * (n - 1) + ntaps() - 1] are referenced to compute the output values.

const std::vector<float> gri_fir_filter_with_buffer_fff::get_taps

(

)

const [inline]

Returns:

current taps

References d_taps, and gr_reverse().

unsigned gri_fir_filter_with_buffer_fff::ntaps

(

)

const [inline]

Returns:

number of taps in filter.

References d_taps.

void gri_fir_filter_with_buffer_fff::set_taps

(

const std::vector< float > &

taps

)

install new_taps as the current taps.

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Member Data Documentation

float* gri_fir_filter_with_buffer_fff::d_buffer [protected]

unsigned int gri_fir_filter_with_buffer_fff::d_idx [protected]

std::vector<float> gri_fir_filter_with_buffer_fff::d_taps [protected]

Referenced by get_taps(), and ntaps().

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

• gri_fir_filter_with_buffer_fff.h