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arm_rfft_instance_f32 Struct Reference

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

Data Fields

uint32_t fftLenReal
 
uint16_t fftLenBy2
 
uint8_t ifftFlagR
 
uint8_t bitReverseFlagR
 
uint32_t twidCoefRModifier
 
const float32_tpTwiddleAReal
 
const float32_tpTwiddleBReal
 
arm_cfft_radix4_instance_f32pCfft
 

Field Documentation

uint8_t arm_rfft_instance_f32::bitReverseFlagR

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

uint16_t arm_rfft_instance_f32::fftLenBy2

length of the complex FFT.

uint32_t arm_rfft_instance_f32::fftLenReal

length of the real FFT.

uint8_t arm_rfft_instance_f32::ifftFlagR

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

arm_cfft_radix4_instance_f32* arm_rfft_instance_f32::pCfft

points to the complex FFT instance.

const float32_t* arm_rfft_instance_f32::pTwiddleAReal

points to the real twiddle factor table.

const float32_t* arm_rfft_instance_f32::pTwiddleBReal

points to the imag twiddle factor table.

uint32_t arm_rfft_instance_f32::twidCoefRModifier

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