#include <AuLib/Stft.h>

Inheritance diagram for AuLib::Stft:

Collaboration diagram for AuLib::Stft:

Public Member Functions
	Stft (const FuncTable &win, bool dir, uint32_t decim=def_decim, bool repr=fft::rectang, uint32_t vframes=def_vframes, double sr=def_sr)

const double *	process (const double *sig, uint32_t vframes=def_vframes)

const Stft &	process (const AudioBase &obj)

const Stft &	operator() (const AudioBase &obj)

bool	repr () const

bool	framecount () const

virtual const std::vector< std::complex< double > > &	spectrum ()

const std::complex< double > &	bin (uint32_t n)

virtual const AudioBase &	operator*= (double scal)

virtual const AudioBase &	operator= (const double sig)

virtual const AudioBase &	operator*= (const Stft &obj)

virtual const AudioBase &	operator+= (double num)

virtual const AudioBase &	operator+= (const double *sig)

virtual const AudioBase &	operator+= (const Stft &obj)

Public Member Functions inherited from AuLib::AudioBase
	AudioBase (uint32_t nchnls=def_nchnls, uint32_t vframes=def_vframes, double sr=def_sr)

virtual const AudioBase &	operator*= (const AudioBase &obj)

virtual const AudioBase &	operator+= (const AudioBase &obj)

double &	operator[] (uint32_t ndx)

const double &	operator[] (uint32_t ndx) const

iterator	begin ()

iterator	end ()

const_iterator	cbegin () const

const_iterator	cend () const

const AudioBase &	set (const AudioBase &obj)

const AudioBase &	set (const double *sig)

const double *	set (double v)

double	set (double v, uint32_t p)

	operator const std::vector< double > & () const

	operator const double * () const

const double *	vector () const

double	vector (uint32_t frndx, uint32_t chn) const

uint32_t	vframes (uint32_t frames)

uint32_t	resize_exact (uint32_t frames)

uint32_t	vframes () const

uint32_t	vsamps () const

uint32_t	nchnls () const

uint32_t	sr () const

uint32_t	error () const

virtual const char *	error_message () const

Protected Member Functions
virtual const double *	transform (const double *sig, uint32_t vframes)

Protected Attributes
const std::complex< double >	m_z

uint32_t	m_N

uint32_t	m_H

uint32_t	m_D

bool	m_dir

bool	m_repr

uint64_t	m_framecount

const FuncTable &	m_win

std::vector< std::vector< double > >	m_framebufs

std::vector< uint32_t >	m_pos

std::vector< std::complex< double > >	m_cdata

Protected Attributes inherited from AuLib::AudioBase
uint32_t	m_nchnls

uint32_t	m_vframes

std::vector< double >	m_vector

double	m_sr

uint32_t	m_error

Additional Inherited Members
Public Types inherited from AuLib::AudioBase
typedef std::vector< double >::iterator	iterator

typedef std::vector< double >::const_iterator	const_iterator

Detailed Description

Stft implements a streaming Short-time Fourier Transform overlapped windows are taken from the input (forward mode) and analysis frames in either rectangular or polar formats are produced in the output (N/2 bins, first bin containing both DC and Nyq points) containing the non-negative spectrum.
On inverse mode, spectral data is read from the input and transformed back to the output, using an overlap-add algorithm.

Constructor & Destructor Documentation

◆ Stft()

AuLib::Stft::Stft	(	const FuncTable &	win,
		bool	dir,
		uint32_t	decim = `def_decim`,
		bool	repr = `fft::rectang`,
		uint32_t	vframes = `def_vframes`,
		double	sr = `def_sr`
	)

inline

Stft constructor

win - analysis window
decim - decimation
dir - transform direction, forward or inverse
repr - data format, fft::polar or fft::rectang
vframes - vector size
sr - sampling rate

Member Function Documentation

◆ bin()

const std::complex<double>& AuLib::Stft::bin ( uint32_t n )

inline

return bin data as a complex<double> ref (only meaningful in forward transforms)

◆ framecount()

bool AuLib::Stft::framecount ( ) const

inline

return analysis frame count

◆ operator()()

const Stft& AuLib::Stft::operator() ( const AudioBase & obj )

inline

operator (a) convenience method

◆ operator*=() [1/3]

virtual const AudioBase& AuLib::Stft::operator*= ( double scal )

inlinevirtual

Scale the spectral data vector

Reimplemented from AuLib::AudioBase.

Reimplemented in AuLib::Pvoc.

◆ operator*=() [2/3]

virtual const AudioBase& AuLib::Stft::operator*= ( const double * sig )

inlinevirtual

Multiply the data vector by a spectral vector

Reimplemented from AuLib::AudioBase.

Reimplemented in AuLib::Pvoc.

◆ operator*=() [3/3]

virtual const AudioBase& AuLib::Stft::operator*= ( const Stft & obj )

inlinevirtual

Multiply the data vector by the vector from obj

◆ operator+=() [1/3]

virtual const AudioBase& AuLib::Stft::operator+= ( double num )

inlinevirtual

Add a double to the spectral data (non-op for polar repr)

Reimplemented from AuLib::AudioBase.

Reimplemented in AuLib::Pvoc.

◆ operator+=() [2/3]

virtual const AudioBase& AuLib::Stft::operator+= ( const double * sig )

inlinevirtual

Add a vector sig to the data vector (non-op for polar repr)

Reimplemented from AuLib::AudioBase.

Reimplemented in AuLib::Pvoc.

◆ operator+=() [3/3]

virtual const AudioBase& AuLib::Stft::operator+= ( const Stft & obj )

inlinevirtual

Add a vector sig from obj to the data vector (non-op for polar repr)

Reimplemented in AuLib::Pvoc.

◆ process() [1/2]

const double* AuLib::Stft::process	(	const double *	sig,
		uint32_t	vframes = `def_vframes`
	)

inline

transform an signal sig, vframes is the (time-domain) processing vector size and it is required to be >= analysis hopsize, otherwise no processing takes place.

◆ process() [2/2]

const Stft& AuLib::Stft::process ( const AudioBase & obj )

inline

transform a signal in obj

◆ repr()

bool AuLib::Stft::repr ( ) const

inline

return data format (fft::polar or fft::rectang)

◆ spectrum()

virtual const std::vector<std::complex<double> >& AuLib::Stft::spectrum ( )

inlinevirtual

spectrum as a complex<double> vector ref (only meaningful in forward transforms)

Reimplemented in AuLib::Pvoc.

◆ transform()

const double * AuLib::Stft::transform	(	const double *	sig,
		uint32_t	vframes
	)

protectedvirtual

STFT transform

Member Data Documentation

◆ m_cdata

std::vector<std::complex<double> > AuLib::Stft::m_cdata

protected

◆ m_D

uint32_t AuLib::Stft::m_D

protected

◆ m_dir

bool AuLib::Stft::m_dir

protected

◆ m_framebufs

std::vector<std::vector<double> > AuLib::Stft::m_framebufs

protected

◆ m_framecount

uint64_t AuLib::Stft::m_framecount

protected

◆ m_H

uint32_t AuLib::Stft::m_H

protected

◆ m_N

uint32_t AuLib::Stft::m_N

protected

◆ m_pos

std::vector<uint32_t> AuLib::Stft::m_pos

protected

◆ m_repr

bool AuLib::Stft::m_repr

protected

◆ m_win

const FuncTable& AuLib::Stft::m_win

protected

◆ m_z

const std::complex<double> AuLib::Stft::m_z

protected

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

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Stft()

Member Function Documentation

◆ bin()

◆ framecount()

◆ operator()()

◆ operator*=() [1/3]

◆ operator*=() [2/3]

◆ operator*=() [3/3]

◆ operator+=() [1/3]

◆ operator+=() [2/3]

◆ operator+=() [3/3]

◆ process() [1/2]

◆ process() [2/2]

◆ repr()

◆ spectrum()

◆ transform()

Member Data Documentation

◆ m_cdata

◆ m_D

◆ m_dir

◆ m_framebufs

◆ m_framecount

◆ m_H

◆ m_N

◆ m_pos

◆ m_repr

◆ m_win

◆ m_z