First order low pass filter. More...

Inheritance diagram for MHAFilter::o1flt_lowpass_t:

Public Member Functions
	o1flt_lowpass_t (const std::vector< mha_real_t > &, mha_real_t, mha_real_t=0)
	Constructor of low pass filter, sets sampling rate and time constants. More...

	o1flt_lowpass_t (const std::vector< mha_real_t > &tau, mha_real_t fs, const std::vector< mha_real_t > &startval)
	Constructor of low pass filter, sets sampling rate and time constants. More...

void	set_tau (unsigned int ch, mha_real_t tau)
	change the time constant in one channel More...

void	set_tau (mha_real_t tau)
	set time constant in all channels to tau More...

mha_real_t	get_c1 (unsigned int ch) const

mha_real_t	get_last_output (unsigned int ch) const

Public Member Functions inherited from MHAFilter::o1_ar_filter_t
	o1_ar_filter_t (unsigned int channels, mha_real_t fs=1.0f, std::vector< mha_real_t > tau_a=std::vector< float >(1, 0.0f), std::vector< mha_real_t > tau_r=std::vector< float >(1, 0.0f))
	Constructor, setting all taus to zero. More...

void	set_tau_attack (unsigned int ch, mha_real_t tau)
	Set the attack time constant. More...

void	set_tau_release (unsigned int ch, mha_real_t tau)
	Set the release time constant. More...

mha_real_t	operator() (unsigned int ch, mha_real_t x)
	Apply filter to value x, using state channel ch. More...

void	operator() (const mha_wave_t &in, mha_wave_t &out)
	Apply filter to a mha_wave_t data. More...

Public 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

Additional Inherited Members
Public 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...

Protected Attributes inherited from MHAFilter::o1_ar_filter_t
MHASignal::waveform_t	c1_a

MHASignal::waveform_t	c2_a

MHASignal::waveform_t	c1_r

MHASignal::waveform_t	c2_r

mha_real_t	fs

Detailed Description

First order low pass filter.

Constructor & Destructor Documentation

◆ o1flt_lowpass_t() [1/2]

MHAFilter::o1flt_lowpass_t::o1flt_lowpass_t	(	const std::vector< mha_real_t > &	tau,
		mha_real_t	fs,
		mha_real_t	startval = `0`
	)

Constructor of low pass filter, sets sampling rate and time constants.

Parameters

tau	Vector of time constants
fs	Sampling rate
startval	Initial internal state value

◆ o1flt_lowpass_t() [2/2]

MHAFilter::o1flt_lowpass_t::o1flt_lowpass_t	(	const std::vector< mha_real_t > &	tau,
		mha_real_t	fs,
		const std::vector< mha_real_t > &	startval
	)

Constructor of low pass filter, sets sampling rate and time constants.

Parameters

tau	Vector of time constants
fs	Sampling rate
startval	Initial internal state value

Member Function Documentation

◆ set_tau() [1/2]

void MHAFilter::o1flt_lowpass_t::set_tau	(	unsigned int	ch,
		mha_real_t	tau
	)

change the time constant in one channel

◆ set_tau() [2/2]

void MHAFilter::o1flt_lowpass_t::set_tau ( mha_real_t tau )

set time constant in all channels to tau

◆ get_c1()

mha_real_t MHAFilter::o1flt_lowpass_t::get_c1 ( unsigned int ch ) const

inline

◆ get_last_output()

mha_real_t MHAFilter::o1flt_lowpass_t::get_last_output ( unsigned int ch ) const