Class for asynchronous level metering. More...

Inheritance diagram for MHASignal::async_rmslevel_t:

Public Member Functions
	async_rmslevel_t (unsigned int frames, unsigned int channels)
	Constructor for level metering class. More...

std::vector< float >	rmslevel () const
	Read-only function for querying the current RMS level. More...

std::vector< float >	peaklevel () const
	Read-only function for querying the current peak level. More...

void	process (mha_wave_t *s)
	Function to store a chunk of audio in the level meter. More...

Private Attributes
unsigned int	pos

unsigned int	filled

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
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

Class for asynchronous level metering.

Constructor & Destructor Documentation

◆ async_rmslevel_t()

MHASignal::async_rmslevel_t::async_rmslevel_t	(	unsigned int	frames,
		unsigned int	channels
	)

Constructor for level metering class.

Allocate memory for metering. The RMS integration time corresponds to the number of frames in the buffer.

Parameters

frames	Number of frames to integrate.
channels	Number of channels used for level-metering.

Member Function Documentation

◆ rmslevel()

std::vector< float > MHASignal::async_rmslevel_t::rmslevel ( ) const

Read-only function for querying the current RMS level.

Returns: Vector of floats, one value for each channel, containing the RMS level in dB (SPL if calibrated properly).

◆ peaklevel()

std::vector< float > MHASignal::async_rmslevel_t::peaklevel ( ) const

Read-only function for querying the current peak level.

Returns: Vector of floats, one value for each channel, containing the peak level in dB (SPL if calibrated properly).

◆ process()

void MHASignal::async_rmslevel_t::process ( mha_wave_t * s )

Function to store a chunk of audio in the level meter.

Parameters

s	Audio chunk (same number of channels required as given in the constructor).

Member Data Documentation

◆ pos

unsigned int MHASignal::async_rmslevel_t::pos

private

◆ filled

unsigned int MHASignal::async_rmslevel_t::filled