FFTPlan Struct Reference

Reusable 1D complex FFT plan for arbitrary nonzero transform lengths. More...

#include <fft_plan.h>

Collaboration diagram for FFTPlan:

Public Attributes
size_t	n
bool	use_bluestein
FFTPow2Plan	pow2_plan
FFTPow2Plan	bluestein_plan
size_t	bluestein_size
double complex *	chirp
double complex *	chirp_conj
double complex *	b_fft
double complex *	a_buffer
double complex *	scratch_n

Detailed Description

Reusable 1D complex FFT plan for arbitrary nonzero transform lengths.

Power-of-two lengths use FFTPow2Plan directly; other lengths own the Bluestein chirp/convolution scratch storage needed by fft_plan_forward() and fft_plan_inverse().

Member Data Documentation

a_buffer

double complex* FFTPlan::a_buffer

Owned Bluestein input work buffer.

b_fft

double complex* FFTPlan::b_fft

Owned FFT of the Bluestein chirp kernel.

bluestein_plan

FFTPow2Plan FFTPlan::bluestein_plan

Convolution FFT plan for Bluestein transforms.

bluestein_size

size_t FFTPlan::bluestein_size

Power-of-two convolution length for Bluestein path.

chirp

double complex* FFTPlan::chirp

Owned Bluestein chirp factors.

chirp_conj

double complex* FFTPlan::chirp_conj

Owned conjugated chirp factors.

n

size_t FFTPlan::n

Transform length.

pow2_plan

FFTPow2Plan FFTPlan::pow2_plan

Direct radix-2 plan for power-of-two lengths.

scratch_n

double complex* FFTPlan::scratch_n

Owned output-length scratch buffer.

use_bluestein

bool FFTPlan::use_bluestein

True when non-power-of-two convolution path is active.

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

• fft_plan.h