PhaseVocoder Class Reference

#include <PhaseVocoder.h>

Public Member Functions
	PhaseVocoder (int size, int hop)
virtual	~PhaseVocoder ()
void	processTimeDomain (const double *src, double *mag, double *phase, double *unwrapped)
void	processFrequencyDomain (const double *reals, const double *imags, double *mag, double *phase, double *unwrapped)
void	reset ()

Protected Member Functions
void	FFTShift (double *src)
void	getMagnitudes (double *mag)
void	getPhases (double *theta)
void	unwrapPhases (double *theta, double *unwrapped)

Protected Attributes
int	m_n
int	m_hop
FFTReal *	m_fft
double *	m_time
double *	m_imag
double *	m_real
double *	m_phase
double *	m_unwrapped

Detailed Description

Definition at line 21 of file PhaseVocoder.h.

Constructor & Destructor Documentation

PhaseVocoder()

PhaseVocoder::PhaseVocoder	(	int	size,
		int	hop
	)

~PhaseVocoder()

virtual PhaseVocoder::~PhaseVocoder ( )

virtual

Member Function Documentation

FFTShift()

void PhaseVocoder::FFTShift ( double *  src )

protected

getMagnitudes()

void PhaseVocoder::getMagnitudes ( double *  mag )

protected

getPhases()

void PhaseVocoder::getPhases ( double *  theta )

protected

processFrequencyDomain()

void PhaseVocoder::processFrequencyDomain	(	const double *	reals,
		const double *	imags,
		double *	mag,
		double *	phase,
		double *	unwrapped
	)

Given one frame of frequency-domain samples, return the magnitudes, instantaneous phases, and unwrapped phases.

reals and imags must each contain size/2+1 values (where size is the frame size value as passed to the PhaseVocoder constructor).

mag, phase, and unwrapped must each be non-NULL and point to enough space for size/2+1 values.

processTimeDomain()

void PhaseVocoder::processTimeDomain	(	const double *	src,
		double *	mag,
		double *	phase,
		double *	unwrapped
	)

Given one frame of time-domain samples, FFT and return the magnitudes, instantaneous phases, and unwrapped phases.

src must have size values (where size is the frame size value as passed to the PhaseVocoder constructor), and should have been windowed as necessary by the caller (but not fft-shifted).

mag, phase, and unwrapped must each be non-NULL and point to enough space for size/2 + 1 values. The redundant conjugate half of the output is not returned.

reset()

void PhaseVocoder::reset

(

)

Reset the stored phases to zero. Note that this may be necessary occasionally (depending on the application) to avoid loss of floating-point precision in the accumulated unwrapped phase values as they grow.

unwrapPhases()

void PhaseVocoder::unwrapPhases ( double *  theta, double *  unwrapped  )

protected

Member Data Documentation

m_fft

FFTReal* PhaseVocoder::m_fft

protected

Definition at line 72 of file PhaseVocoder.h.

m_hop

int PhaseVocoder::m_hop

protected

Definition at line 71 of file PhaseVocoder.h.

m_imag

double* PhaseVocoder::m_imag

protected

Definition at line 74 of file PhaseVocoder.h.

m_n

int PhaseVocoder::m_n

protected

Definition at line 70 of file PhaseVocoder.h.

m_phase

double* PhaseVocoder::m_phase

protected

Definition at line 76 of file PhaseVocoder.h.

m_real

double* PhaseVocoder::m_real

protected

Definition at line 75 of file PhaseVocoder.h.

m_time

double* PhaseVocoder::m_time

protected

Definition at line 73 of file PhaseVocoder.h.

m_unwrapped

double* PhaseVocoder::m_unwrapped

protected

Definition at line 77 of file PhaseVocoder.h.

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

• PhaseVocoder.h