CLAM::FFT_ooura Class Reference

Implementation of the FFT using the algorithm from Takuya OOURA in C. More...

#include <FFT_ooura.hxx>

List of all members.

Public Member Functions
	FFT_ooura ()
	FFT_ooura (const FFTConfig &c) throw (ErrDynamicType)
	~FFT_ooura ()
const char *	GetClassName () const
	Override it in every subclass and retur the name of that class.
bool	Do ()
	Supervised-mode Do function.
bool	Do (const Audio &in, Spectrum &out)
	Standard FFT Do function, with storage class references as arguments.
bool	MayDisableExecution () const
Static Public Member Functions
static void	rdft (int n, int isgn, TData *a, int *ip, TData *w)
static void	makewt (int nw, int *ip, TData *w)
static void	makect (int nc, int *ip, TData *c)
static void	bitrv2 (int n, int *ip, TData *a)
static void	cftfsub (int n, TData *a, TData *w)
static void	cftbsub (int n, TData *a, TData *w)
static void	rftfsub (int n, TData *a, int nc, TData *c)
static void	rftbsub (int n, TData *a, int nc, TData *c)
static void	cft1st (int n, TData *a, TData *w)
static void	cftmdl (int n, int l, TData *a, TData *w)

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Detailed Description

Implementation of the FFT using the algorithm from Takuya OOURA in C.

See also:

Ooura's FFT Homepage

Definition at line 44 of file FFT_ooura.hxx.

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Constructor & Destructor Documentation

CLAM::FFT_ooura::FFT_ooura

(

)

Definition at line 80 of file FFT_ooura.cxx.

References CLAM::Processing::Configure().

CLAM::FFT_ooura::FFT_ooura

(

const FFTConfig &

c

)

throw (ErrDynamicType)

Definition at line 86 of file FFT_ooura.cxx.

CLAM::FFT_ooura::~FFT_ooura

(

)

Definition at line 92 of file FFT_ooura.cxx.

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Member Function Documentation

void CLAM::FFT_ooura::bitrv2	(	int	n,
		int *	ip,
		TData *	a
	)			[static]

Definition at line 282 of file FFT_ooura.cxx.

Referenced by makewt(), and rdft().

void CLAM::FFT_ooura::cft1st	(	int	n,
		TData *	a,
		TData *	w
	)			[static]

Definition at line 479 of file FFT_ooura.cxx.

Referenced by cftbsub(), and cftfsub().

void CLAM::FFT_ooura::cftbsub	(	int	n,
		TData *	a,
		TData *	w
	)			[static]

Definition at line 430 of file FFT_ooura.cxx.

References cft1st(), and cftmdl().

Referenced by rdft().

void CLAM::FFT_ooura::cftfsub	(	int	n,
		TData *	a,
		TData *	w
	)			[static]

Definition at line 381 of file FFT_ooura.cxx.

References cft1st(), and cftmdl().

Referenced by rdft().

void CLAM::FFT_ooura::cftmdl	(	int	n,
		int	l,
		TData *	a,
		TData *	w
	)			[static]

Definition at line 584 of file FFT_ooura.cxx.

Referenced by cftbsub(), and cftfsub().

bool CLAM::FFT_ooura::Do	(	const Audio &	in,
		Spectrum &	out
	)			[virtual]

Standard FFT Do function, with storage class references as arguments.

This method implements the old conversor routines. The resulting spectrum will be of input audio size / 2 + 1. Input audio must be a power-of-two.

Implements CLAM::FFT_base.

Definition at line 106 of file FFT_ooura.cxx.

References CLAM::FFT_base::CheckTypes(), CLAM_ASSERT, CLAM_DEBUG_ASSERT, CLAM::FFT_base::fftbuffer, isPowerOfTwo(), CLAM::Processing::IsRunning(), CLAM::FFT_base::mComplexflags, CLAM::FFT_base::mSize, CLAM::FFT_base::mState, rdft(), CLAM::FFT_base::sComplex, CLAM::FFT_base::sComplexSync, CLAM::FFT_base::sOther, and CLAM::Spectrum::SynchronizeTo().

bool CLAM::FFT_ooura::Do

(

)

[virtual]

Supervised-mode Do function.

Implements CLAM::FFT_base.

Definition at line 97 of file FFT_ooura.cxx.

References CLAM::InPort< Token >::Consume(), CLAM::AudioInPort::GetAudio(), CLAM::OutPort< Token >::GetData(), CLAM::InPort< Token >::GetSize(), CLAM::FFT_base::mInput, CLAM::FFT_base::mOutput, CLAM::OutPort< Token >::Produce(), and CLAM::Spectrum::SetSize().

const char* CLAM::FFT_ooura::GetClassName

(

)

const [inline, virtual]

Override it in every subclass and retur the name of that class.

Implements CLAM::Processing.

Definition at line 90 of file FFT_ooura.hxx.

void CLAM::FFT_ooura::makect	(	int	nc,
		int *	ip,
		TData *	c
	)			[static]

Definition at line 264 of file FFT_ooura.cxx.

References CLAM_atan(), CLAM_cos(), and CLAM_sin().

Referenced by rdft().

void CLAM::FFT_ooura::makewt	(	int	nw,
		int *	ip,
		TData *	w
	)			[static]

Definition at line 235 of file FFT_ooura.cxx.

References bitrv2(), CLAM_atan(), CLAM_cos(), and CLAM_sin().

Referenced by rdft().

bool CLAM::FFT_ooura::MayDisableExecution

(

)

const [inline, virtual]

Reimplemented from CLAM::FFT_base.

Definition at line 99 of file FFT_ooura.hxx.

void CLAM::FFT_ooura::rdft	(	int	n,
		int	isgn,
		TData *	a,
		int *	ip,
		TData *	w
	)			[static]

Definition at line 194 of file FFT_ooura.cxx.

References bitrv2(), cftbsub(), cftfsub(), makect(), makewt(), rftbsub(), and rftfsub().

Referenced by CLAM::IFFT_ooura::Do(), and Do().

void CLAM::FFT_ooura::rftbsub	(	int	n,
		TData *	a,
		int	nc,
		TData *	c
	)			[static]

Definition at line 736 of file FFT_ooura.cxx.

Referenced by rdft().

void CLAM::FFT_ooura::rftfsub	(	int	n,
		TData *	a,
		int	nc,
		TData *	c
	)			[static]

Definition at line 711 of file FFT_ooura.cxx.

Referenced by rdft().

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

• FFT_ooura.hxx
• FFT_ooura.cxx