PFFFT_Setup Struct Reference

Internal state for a PFFFT transform instance. More...

#include <pffft.h>

Data Fields
int	N
int	Ncvec
int	ifac [15]
pffft_transform_t	transform
v4sf *	data
float *	e
float *	twiddle

Detailed Description

Internal state for a PFFFT transform instance.

Opaque struct holding internal stuff (precomputed twiddle factors).

This struct can be shared by many threads as it contains only read-only data.

Field Documentation

data

v4sf* PFFFT_Setup::data

Allocated room for twiddle coefficients

e

float* PFFFT_Setup::e

Points into data, N/4*3 elements

ifac

int PFFFT_Setup::ifac[15]

Factorization of the FFT size

N

int PFFFT_Setup::N

FFT size

Ncvec

int PFFFT_Setup::Ncvec

Number of complex SIMD vectors (N/4 if PFFFT_COMPLEX, N/8 if PFFFT_REAL)

transform

pffft_transform_t PFFFT_Setup::transform

Transform type (real or complex)

twiddle

float* PFFFT_Setup::twiddle

Points into data, N/4 elements

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

• pffft.c