riscv_rfft_instance_f32 Struct Reference

Instance structure for the floating-point RFFT/RIFFT function. More...

Data Fields
uint32_t	fftLenReal
uint16_t	fftLenBy2
uint8_t	ifftFlagR
uint8_t	bitReverseFlagR
uint32_t	twidCoefRModifier
const float32_t *	pTwiddleAReal
const float32_t *	pTwiddleBReal
riscv_cfft_radix4_instance_f32 *	pCfft

Detailed Description

Instance structure for the floating-point RFFT/RIFFT function.

Field Documentation

bitReverseFlagR

uint8_t riscv_rfft_instance_f32::bitReverseFlagR

flag that enables (bitReverseFlagR=1) or disables (bitReverseFlagR=0) bit reversal of output.

fftLenBy2

uint16_t riscv_rfft_instance_f32::fftLenBy2

length of the complex FFT.

fftLenReal

uint32_t riscv_rfft_instance_f32::fftLenReal

length of the real FFT.

ifftFlagR

uint8_t riscv_rfft_instance_f32::ifftFlagR

flag that selects forward (ifftFlagR=0) or inverse (ifftFlagR=1) transform.

pCfft

riscv_cfft_radix4_instance_f32* riscv_rfft_instance_f32::pCfft

points to the complex FFT instance.

pTwiddleAReal

const float32_t* riscv_rfft_instance_f32::pTwiddleAReal

points to the real twiddle factor table.

pTwiddleBReal

const float32_t* riscv_rfft_instance_f32::pTwiddleBReal

points to the imag twiddle factor table.

twidCoefRModifier

uint32_t riscv_rfft_instance_f32::twidCoefRModifier

twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table.