SDFT< T > Class Template Reference

Sliding discrete Fourier transform (SDFT) More...

#include <DFT.h>

Inheritance diagram for SDFT< T >:

List of all members.

Public Member Functions
	SDFT (uint32_t sizeDFT, uint32_t binLo, uint32_t binHi)
void	forward (T input)
	Input next sample and perform forward transform.
SDFT &	interval (uint32_t binLo, uint32_t binHi)
	Set endpoints of frequency interval.
void	resize (uint32_t sizeDFT, uint32_t binLo, uint32_t binHi)
	Resize transform.
T *	aux (uint32_t num)
	Get pointer to an auxiliary buffer.
Complex< T > *	bins () const
	Get pointer to bin data.
Complex< T > &	bin (uint32_t k)
	Get reference to bin value.
const Complex< T > &	bin (uint32_t k) const
	Get read-only reference to bin value.
double	binFreq () const
	Get width of frequency bins.
uint32_t	numBins () const
	Get number of frequency bins.
uint32_t	sizeDFT () const
	Get size of forward transform.
Sync &	syncFreq ()
	Get frequency domain synchronizer.
void	numAux (uint32_t num)
	Sets number of auxilliary buffers, each of size numBins()
virtual void	onResync (double r)
	Called by my Sync reference after it changes its value.
double	scaleSPU () const
	Returns ratio of my SPU to my Sync's SPU.
void	scaleSPU (double v)
	Scales samples/unit by factor.
double	spu () const
	Returns local samples/unit.
void	spu (double v)
	Set local samples/unit.
double	ups () const
	Returns local units/sample.
void	ups (double v)
	Set local units/sample.
const Sync *	sync () const
	Returns reference to my Sync.
void	sync (Sync &src)
	Set absolute Sync source.
void	scaleUPS (double v)
	Scales units/sample by factor.
void	nodeInsertL (Synced &node)
	Insert myself to left of node.
void	nodeInsertR (Synced &node)
	Insert myself to right of node.
void	nodeRemove ()
	Remove myself from linked list.
Public Attributes
Synced *	nodeL
	Pointer to left node.
Synced *	nodeR
	Pointer to right node.
Protected Member Functions
void	initSynced ()
	To be called from the constructor(s) of derived classes.

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Detailed Description

template<class T>
class gam::SDFT< T >

Sliding discrete Fourier transform (SDFT)

This transform computes the DFT with a fixed hop size of 1 sample and within a specified frequency interval. The computational complexity per sample is O(M), where M is the size, in samples, of the frequency interval.

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Constructor & Destructor Documentation

SDFT	(	uint32_t	sizeDFT,
		uint32_t	binLo,
		uint32_t	binHi
	)

Parameters:

[in]	sizeDFT	transform size, in samples
[in]	binLo	lower closed endpoint of frequency interval
[in]	binHi	upper open endpoint of frequency interval

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Member Function Documentation

void onResync

(

double

ratioSPU

)

[virtual, inherited]

Called by my Sync reference after it changes its value.

Any instance state that depends on the sampling length should be updated here.

Reimplemented from Synced.

Reimplemented in DFT.

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

• /Users/ljp/code/gamma/trunk/Gamma/DFT.h