csky_rfft_instance_q31 Struct Reference

Instance structure for the Q31 RFFT/RIFFT function.

Data Fields
uint32_t	fftLenReal
uint8_t	ifftFlagR
uint8_t	bitReverseFlagR
uint32_t	twidCoefRModifier
q31_t *	pTwiddleAReal
q31_t *	pTwiddleBReal
const csky_cfft_instance_q31 *	pCfft

Field Documentation

uint8_t csky_rfft_instance_q31::bitReverseFlagR

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

uint32_t csky_rfft_instance_q31::fftLenReal

length of the real FFT.

uint8_t csky_rfft_instance_q31::ifftFlagR

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

const csky_cfft_instance_q31* csky_rfft_instance_q31::pCfft

points to the complex FFT instance.

q31_t* csky_rfft_instance_q31::pTwiddleAReal

points to the real twiddle factor table.

q31_t* csky_rfft_instance_q31::pTwiddleBReal

points to the imag twiddle factor table.

uint32_t csky_rfft_instance_q31::twidCoefRModifier

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