fftconvolver Namespace Reference

Classes
class	Buffer
	Simple buffer implementation (uses 16-byte alignment if SSE optimization is enabled) More...
class	FFTConvolver
	Implementation of a partitioned FFT convolution algorithm with uniform block size. More...
class	SplitComplex
	Buffer for split-complex representation of FFT results. More...
class	TwoStageFFTConvolver
	FFT convolver using two different block sizes. More...

Typedefs
typedef float	Sample
	Type of one sample.
typedef Buffer< Sample >	SampleBuffer
	Buffer for samples.

Functions
bool	SSEEnabled ()
	Returns whether SSE optimization for the convolver is enabled.
void	Sum (Sample *FFTCONVOLVER_RESTRICT result, const Sample *FFTCONVOLVER_RESTRICT a, const Sample *FFTCONVOLVER_RESTRICT b, size_t len)
	Sums two given sample arrays.
void	ComplexMultiplyAccumulate (SplitComplex &result, const SplitComplex &a, const SplitComplex &b)
	Adds the complex product of two split-complex buffers to a result buffer.
void	ComplexMultiplyAccumulate (Sample *FFTCONVOLVER_RESTRICT re, Sample *FFTCONVOLVER_RESTRICT im, const Sample *FFTCONVOLVER_RESTRICT reA, const Sample *FFTCONVOLVER_RESTRICT imA, const Sample *FFTCONVOLVER_RESTRICT reB, const Sample *FFTCONVOLVER_RESTRICT imB, const size_t len)
	Adds the complex product of two split-complex arrays to a result array.
template<typename T >
T	NextPowerOf2 (const T &val)
	Returns the next power of 2 of a given number.
template<typename T >
void	CopyAndPad (Buffer< T > &dest, const T *src, size_t srcSize)
	Copies a source array into a destination buffer and pads the destination buffer with zeros.

Typedef Documentation

Sample

typedef float fftconvolver::Sample

Type of one sample.

SampleBuffer

typedef Buffer<Sample> fftconvolver::SampleBuffer

Buffer for samples.

Function Documentation

ComplexMultiplyAccumulate() [1/2]

void fftconvolver::ComplexMultiplyAccumulate	(	Sample *FFTCONVOLVER_RESTRICT	re,
		Sample *FFTCONVOLVER_RESTRICT	im,
		const Sample *FFTCONVOLVER_RESTRICT	reA,
		const Sample *FFTCONVOLVER_RESTRICT	imA,
		const Sample *FFTCONVOLVER_RESTRICT	reB,
		const Sample *FFTCONVOLVER_RESTRICT	imB,
		const size_t	len )

Adds the complex product of two split-complex arrays to a result array.

Parameters

re	The real part of the result buffer
im	The imaginary part of the result buffer
reA	The real part of the 1st factor of the complex product
imA	The imaginary part of the 1st factor of the complex product
reB	The real part of the 2nd factor of the complex product
imB	The imaginary part of the 2nd factor of the complex product

ComplexMultiplyAccumulate() [2/2]

void fftconvolver::ComplexMultiplyAccumulate	(	SplitComplex &	result,
		const SplitComplex &	a,
		const SplitComplex &	b )

Adds the complex product of two split-complex buffers to a result buffer.

Parameters

result	The result buffer
a	The 1st factor of the complex product
b	The 2nd factor of the complex product

CopyAndPad()

template<typename T >

void fftconvolver::CopyAndPad	(	Buffer< T > &	dest,
		const T *	src,
		size_t	srcSize )

Copies a source array into a destination buffer and pads the destination buffer with zeros.

Parameters

dest	The destination buffer
src	The source array
srcSize	The size of the source array

NextPowerOf2()

template<typename T >

T fftconvolver::NextPowerOf2

(

const T &

val

)

Returns the next power of 2 of a given number.

Parameters

val	The number

Returns

The next power of 2

SSEEnabled()

bool fftconvolver::SSEEnabled

(

)

Returns whether SSE optimization for the convolver is enabled.

Returns

true: Enabled - false: Disabled

Sum()

void fftconvolver::Sum	(	Sample *FFTCONVOLVER_RESTRICT	result,
		const Sample *FFTCONVOLVER_RESTRICT	a,
		const Sample *FFTCONVOLVER_RESTRICT	b,
		size_t	len )

Sums two given sample arrays.

Parameters

result	The result array
a	The 1st array
b	The 2nd array
len	The length of the arrays