Struct CfftI32 

pub struct CfftI32 {
    pub n_fft: usize,
    pub ifft_flag: bool,
    pub bit_reverse_flag: bool,
    pub twiddle: &'static [u32],
    pub bit_rev_table: &'static [u16],
}

Input and Output formats for CFFT Q31

CFFT Size	Input Format	Output Format	Number of bits to upscale
16	1.31	5.27	4
64	1.31	7.25	6
256	1.31	9.23	8
1024	1.31	11.21	10

Input and Output formats for CIFFT Q31

CIFFT Size	Input Format	Output Format	Number of bits to upscale
16	1.31	5.27	0
64	1.31	7.25	0
256	1.31	9.23	0
1024	1.31	11.21	0

Fields

n_fft: usize

ifft_flag: bool

bit_reverse_flag: bool

twiddle: &'static [u32]

bit_rev_table: &'static [u16]

Implementations

impl CfftI32

pub const fn new(n_fft: usize, ifft_flag: bool, bit_reverse_flag: bool) -> Self

pub fn run(&self, data: &mut [i32])

Q31 CFFT/CIFFT entry with the same dispatch pattern as CMSIS arm_cfft_q31.