Struct cmsis_dsp_sys_pregenerated::arm_rfft_instance_q31

#[repr(C)]pub struct arm_rfft_instance_q31 {
    pub fftLenReal: u32,
    pub ifftFlagR: u8,
    pub bitReverseFlagR: u8,
    pub twidCoefRModifier: u32,
    pub pTwiddleAReal: *const q31_t,
    pub pTwiddleBReal: *const q31_t,
    pub pCfft: *const arm_cfft_instance_q31,
}

@brief Instance structure for the Q31 RFFT/RIFFT function.

Fields

fftLenReal: u32

< length of the real FFT.

ifftFlagR: u8

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

bitReverseFlagR: u8

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

twidCoefRModifier: u32

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

pTwiddleAReal: *const q31_t

< points to the real twiddle factor table.

pTwiddleBReal: *const q31_t

< points to the imag twiddle factor table.

pCfft: *const arm_cfft_instance_q31

< points to the complex FFT instance.