FFT based overlapping filter bank. More...

Inheritance diagram for MHAOvlFilter::fftfb_t:

Public Member Functions
	fftfb_t (MHAOvlFilter::fftfb_vars_t &par, unsigned int nfft, mha_real_t fs)
	Constructor for a FFT-based overlapping filter bank. More...

	~fftfb_t ()

void	apply_gains (mha_spec_t s_out, const mha_spec_t s_in, const mha_wave_t *gains)

void	get_fbpower (mha_wave_t fbpow, const mha_spec_t s_in)

void	get_fbpower_db (mha_wave_t fbpow, const mha_spec_t s_in)

std::vector< mha_real_t >	get_ltass_gain_db () const

unsigned int	bin1 (unsigned int band) const
	Return index of first non-zero filter shape window. More...

unsigned int	bin2 (unsigned int band) const
	Return index of first zero filter shape window above center frequency. More...

unsigned int	get_fftlen () const
	Return fft length. More...

mha_real_t	w (unsigned int k, unsigned int b) const
	Return filter shape window at index k in band b. More...

Public Member Functions inherited from MHAOvlFilter::fspacing_t
	fspacing_t (const MHAOvlFilter::fftfb_vars_t &par, unsigned int nfft, mha_real_t fs)

std::vector< unsigned int >	get_cf_fftbin () const

std::vector< mha_real_t >	get_cf_hz () const

std::vector< mha_real_t >	get_ef_hz () const

unsigned int	nbands () const
	Return number of bands in filter bank. More...

Private Attributes
unsigned int *	vbin1

unsigned int *	vbin2

mha_real_t(*	shape )(mha_real_t)

unsigned int	fftlen

mha_real_t	samplingrate

Private Attributes inherited from mha_wave_t
mha_real_t *	buf
	signal buffer More...

unsigned int	num_channels
	number of channels More...

unsigned int	num_frames
	number of frames in each channel More...

mha_channel_info_t *	channel_info
	detailed channel description More...

Additional Inherited Members
Protected Member Functions inherited from MHAOvlFilter::fspacing_t
void	fail_on_nonmonotonic_cf ()

void	fail_on_unique_fftbins ()

Protected Attributes inherited from MHAOvlFilter::fspacing_t
std::vector< MHAOvlFilter::band_descriptor_t >	bands

mha_real_t(*	symmetry_scale )(mha_real_t)

Private Member Functions inherited from MHASignal::waveform_t
	waveform_t (const unsigned int &frames, const unsigned int &channels)
	constructor of waveform_t More...

	waveform_t (const mhaconfig_t &cf)
	Constructor to create a waveform from plugin configuration. More...

	waveform_t (const mha_wave_t &src)
	Copy contructor for mha_wave_t source. More...

	waveform_t (const MHASignal::waveform_t &src)
	Copy contructor. More...

	waveform_t (const std::vector< mha_real_t > &src)
	Copy contructor for std::vector<mha_real_t> source. More...

virtual	~waveform_t (void)

std::vector< mha_real_t >	flatten () const

	operator std::vector< mha_real_t > () const

void	operator= (const mha_real_t &v)

mha_real_t &	operator[] (unsigned int k)

const mha_real_t &	operator[] (unsigned int k) const

mha_real_t &	value (unsigned int t, unsigned int ch)
	Element accessor. More...

mha_real_t &	operator() (unsigned int t, unsigned int ch)
	Element accessor. More...

const mha_real_t &	value (unsigned int t, unsigned int ch) const
	Constant element accessor. More...

const mha_real_t &	operator() (unsigned int t, unsigned int ch) const
	Constant element accessor. More...

mha_real_t	sum (const unsigned int &a, const unsigned int &b)
	sum of all elements between [a,b) in all channels More...

mha_real_t	sum (const unsigned int &a, const unsigned int &b, const unsigned int &ch)
	sum of all elements between [a,b) in channel ch More...

mha_real_t	sum ()
	sum of all elements More...

mha_real_t	sumsqr ()
	sum of square of all elements More...

mha_real_t	sum_channel (const unsigned int &)
	return sum of all elements in one channel More...

void	assign (const unsigned int &k, const unsigned int &ch, const mha_real_t &val)
	set frame "k" in channel "ch" to value "val" More...

void	assign (const mha_real_t &)
	set all elements to value More...

void	assign_frame (const unsigned int &k, const mha_real_t &val)
	assign value "val" to frame k in all channels More...

void	assign_channel (const unsigned int &c, const mha_real_t &val)
	assign value "val" to channel ch in all frames More...

void	copy (const std::vector< mha_real_t > &v)

void	copy (const mha_wave_t &)
	copy data from source into current waveform More...

void	copy (const mha_wave_t *)

void	copy_channel (const mha_wave_t &, unsigned int, unsigned int)
	Copy one channel of a given waveform signal to a target channel. More...

void	copy_from_at (unsigned int, unsigned int, const mha_wave_t &, unsigned int)
	Copy part of the source signal into part of this waveform object. More...

void	export_to (mha_wave_t &)
	copy data into allocated mha_wave_t structure More...

void	limit (const mha_real_t &min, const mha_real_t &max)
	limit target to range [min,max] More...

void	power (const waveform_t &)
	transform waveform signal (in Pa) to squared signal (in W/m^2) More...

void	powspec (const mha_spec_t &)
	get the power spectrum (in W/m^2) from a complex spectrum More...

void	scale (const unsigned int &a, const unsigned int &b, const unsigned int &ch, const mha_real_t &val)
	scale section [a,b) in channel "ch" by "val" More...

void	scale (const unsigned int &k, const unsigned int &ch, const mha_real_t &val)
	scale one element More...

void	scale_channel (const unsigned int &, const mha_real_t &)
	scale one channel of target with a scalar More...

void	scale_frame (const unsigned int &, const mha_real_t &)

unsigned int	get_size () const

Detailed Description

FFT based overlapping filter bank.

Constructor & Destructor Documentation

◆ fftfb_t()

MHAOvlFilter::fftfb_t::fftfb_t	(	MHAOvlFilter::fftfb_vars_t &	par,
		unsigned int	nfft,
		mha_real_t	fs
	)

Constructor for a FFT-based overlapping filter bank.

Parameters

par	Parameters for the FFT filterbank that can not be deduced from the signal dimensions are taken from this set of configuration variables.
nfft	FFT length
fs	Sampling rate / Hz

◆ ~fftfb_t()

MHAOvlFilter::fftfb_t::~fftfb_t ( )

Member Function Documentation

◆ apply_gains()

void MHAOvlFilter::fftfb_t::apply_gains	(	mha_spec_t *	s_out,
		const mha_spec_t *	s_in,
		const mha_wave_t *	gains
	)

◆ get_fbpower()

void MHAOvlFilter::fftfb_t::get_fbpower	(	mha_wave_t *	fbpow,
		const mha_spec_t *	s_in
	)

◆ get_fbpower_db()

void MHAOvlFilter::fftfb_t::get_fbpower_db	(	mha_wave_t *	fbpow,
		const mha_spec_t *	s_in
	)

◆ get_ltass_gain_db()

std::vector< float > MHAOvlFilter::fftfb_t::get_ltass_gain_db ( ) const

◆ bin1()

unsigned int MHAOvlFilter::fftfb_t::bin1 ( unsigned int band ) const

inline

Return index of first non-zero filter shape window.

◆ bin2()

unsigned int MHAOvlFilter::fftfb_t::bin2 ( unsigned int band ) const

inline

Return index of first zero filter shape window above center frequency.

◆ get_fftlen()

unsigned int MHAOvlFilter::fftfb_t::get_fftlen ( ) const

inline

Return fft length.

◆ w()

mha_real_t MHAOvlFilter::fftfb_t::w	(	unsigned int	k,
		unsigned int	b
	)		const

inline

Return filter shape window at index k in band b.

Parameters

k	Frequency index
b	Band index

Member Data Documentation

◆ vbin1

unsigned int* MHAOvlFilter::fftfb_t::vbin1

private

◆ vbin2

unsigned int* MHAOvlFilter::fftfb_t::vbin2

private

◆ shape

mha_real_t(* MHAOvlFilter::fftfb_t::shape) (mha_real_t)

private

◆ fftlen

unsigned int MHAOvlFilter::fftfb_t::fftlen

private

◆ samplingrate

mha_real_t MHAOvlFilter::fftfb_t::samplingrate

private

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

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ fftfb_t()

◆ ~fftfb_t()

Member Function Documentation

◆ apply_gains()

◆ get_fbpower()

◆ get_fbpower_db()

◆ get_ltass_gain_db()

◆ bin1()

◆ bin2()

◆ get_fftlen()

◆ w()

Member Data Documentation

◆ vbin1

◆ vbin2

◆ shape

◆ fftlen

◆ samplingrate