#include <PhaseVocoder.h>

Public Member Functions
	PhaseVocoder (int size, int hop)

virtual	~PhaseVocoder ()

void	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. More...

void	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. More...

void	reset ()
	Reset the stored phases to zero. More...

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	(	int	size,
		int	hop
	)

Definition at line 27 of file PhaseVocoder.cpp.

References m_fft, m_imag, m_n, m_phase, m_real, m_time, m_unwrapped, and reset().

PhaseVocoder::~PhaseVocoder ( )

virtual

Definition at line 46 of file PhaseVocoder.cpp.

References m_fft, m_imag, m_phase, m_real, m_time, and m_unwrapped.

Member Function Documentation

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.

Definition at line 66 of file PhaseVocoder.cpp.

References FFTShift(), FFTReal::forward(), getMagnitudes(), getPhases(), m_fft, m_imag, m_n, m_real, m_time, and unwrapPhases().

Referenced by DetectionFunction::processTimeDomain().

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.

Definition at line 80 of file PhaseVocoder.cpp.

References getMagnitudes(), getPhases(), m_imag, m_n, m_real, and unwrapPhases().

Referenced by DetectionFunction::processFrequencyDomain().

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.

Definition at line 94 of file PhaseVocoder.cpp.

References m_hop, m_n, m_phase, and m_unwrapped.

Referenced by PhaseVocoder().

void PhaseVocoder::FFTShift ( double * src )

protected

Definition at line 56 of file PhaseVocoder.cpp.

References m_n.

Referenced by processTimeDomain().

void PhaseVocoder::getMagnitudes ( double * mag )

protected

Definition at line 107 of file PhaseVocoder.cpp.

References m_imag, m_n, and m_real.