Applies FIR filtering via FFT-based overlap-add convolution for continuous data streams. More...

#include <rt_filter.h>

Public Types
typedef QSharedPointer< FilterOverlapAdd >	SPtr
typedef QSharedPointer< const FilterOverlapAdd >	ConstSPtr

Public Member Functions
Eigen::MatrixXd	calculate (const Eigen::MatrixXd &matData, int type, double dCenterfreq, double dBandwidth, double dTransition, double dSFreq, int iOrder=1024, int designMethod=UTILSLIB::FilterKernel::m_designMethods.indexOf(UTILSLIB::FilterParameter("Cosine")), const Eigen::RowVectorXi &vecPicks=Eigen::RowVectorXi(), bool bFilterEnd=true, bool bUseThreads=true, bool bKeepOverhead=false)
Eigen::MatrixXd	calculate (const Eigen::MatrixXd &matData, const UTILSLIB::FilterKernel &filterKernel, const Eigen::RowVectorXi &vecPicks=Eigen::RowVectorXi(), bool bFilterEnd=true, bool bUseThreads=true, bool bKeepOverhead=false)
void	reset ()

Detailed Description

Applies FIR filtering via FFT-based overlap-add convolution for continuous data streams.

Filtering with FFT convolution and the overlap add method for continuous data streams. This class will hold all needed information about the last block in order to overlap it with the current one.

Definition at line 253 of file rt_filter.h.

Member Typedef Documentation

◆ ConstSPtr

typedef QSharedPointer<const FilterOverlapAdd> RTPROCESSINGLIB::FilterOverlapAdd::ConstSPtr

Const shared pointer type for FilterOverlapAdd.

Definition at line 257 of file rt_filter.h.

◆ SPtr

typedef QSharedPointer<FilterOverlapAdd> RTPROCESSINGLIB::FilterOverlapAdd::SPtr

Shared pointer type for FilterOverlapAdd.

Definition at line 256 of file rt_filter.h.

Member Function Documentation

◆ calculate() [1/2]

Eigen::MatrixXd RTPROCESSINGLIB::FilterOverlapAdd::calculate	(	const Eigen::MatrixXd &	matData,
		const UTILSLIB::FilterKernel &	filterKernel,
		const Eigen::RowVectorXi &	vecPicks = Eigen::RowVectorXi(),
		bool	bFilterEnd = true,
		bool	bUseThreads = true,
		bool	bKeepOverhead = false )

Calculates the filtered version of the raw input data based on a given list filters

Parameters

[in]	matData	The data which is to be filtered.
[in]	filterKernel	The list of filter kernels to use.
[in]	vecPicks	Channel indexes to filter. Default is filter all channels.
[in]	bFilterEnd	Whether to perform the overlap add in the beginning or end of the data. Default is set to true (end of data).
[in]	bUseThreads	Whether to use multiple threads. Default is set to true.
[in]	bKeepOverhead	Whether to keep the delayed part of the data after filtering. Default is set to false .

Returns: The filtered data in form of a matrix.

◆ calculate() [2/2]

Eigen::MatrixXd RTPROCESSINGLIB::FilterOverlapAdd::calculate	(	const Eigen::MatrixXd &	matData,
		int	type,
		double	dCenterfreq,
		double	dBandwidth,
		double	dTransition,
		double	dSFreq,
		int	iOrder = 1024,
		int	designMethod = UTILSLIB::FilterKernel::m_designMethods.indexOf(UTILSLIB::FilterParameter("Cosine")),
		const Eigen::RowVectorXi &	vecPicks = Eigen::RowVectorXi(),
		bool	bFilterEnd = true,
		bool	bUseThreads = true,
		bool	bKeepOverhead = false )

Creates a user designed filter kernel and filters the raw input data

Parameters

[in]	matData	The data which is to be filtered.
[in]	type	The type of the filter: LPF, HPF, BPF, NOTCH (from enum FilterType).
[in]	dCenterfreq	The center of the frequency.
[in]	dBandwidth	The filter bandwidth. Ignored if FilterType is set to LPF,HPF. If NOTCH/BPF: bandwidth of stop-/passband.
[in]	dTransition	The transition band determines the width of the filter slopes (steepness).
[in]	dSFreq	The input data sampling frequency.
[in]	iOrder	Represents the order of the filter, the higher the higher is the stopband attenuation. Default is 1024 taps.
[in]	designMethod	The design method to use. Choose between Cosine and Tschebyscheff. Default is set to Cosine.
[in]	vecPicks	Channel indexes to filter. Default is filter all channels.
[in]	bFilterEnd	Whether to perform the overlap add in the beginning or end of the data. Default is set to true (end of data).
[in]	bUseThreads	Whether to use multiple threads. Default is set to true.
[in]	bKeepOverhead	Whether to keep the delayed part of the data after filtering. Default is set to false .

Returns: The filtered data in form of a matrix.

◆ reset()

void FilterOverlapAdd::reset ( )

Reset the stored overlap matrices

Definition at line 534 of file rt_filter.cpp.

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

src/libraries/dsp/rt/rt_filter.h
src/libraries/dsp/rt/rt_filter.cpp

Public Types

Public Member Functions