Struct RfftI16 

pub struct RfftI16 {
    pub n_fft_real: usize,
    pub ifft_flag: bool,
    pub bit_reverse_flag: bool,
    pub re_table: &'static [u16],
    pub im_table: &'static [u16],
}

Real-valued Fast Fourier Transform (RFFT) and its inverse (RIFFT) implementations for 16-bit fixed-point data.

Input and Output formats for RFFT Q15

RFFT Size	Input Format	Output Format	Number of bits to upscale
32	1.15	6.10	5
64	1.15	7.9	6
128	1.15	8.8	7
256	1.15	9.7	8
512	1.15	10.6	9
1024	1.15	11.5	10
2048	1.15	12.4	11
4096	1.15	13.3	12
8192	1.15	14.2	13

Input and Output formats for RIFFT Q15

RFFT Size	Input Format	Output Format	Number of bits to upscale
32	1.15	6.10	0
64	1.15	7.9	0
128	1.15	8.8	0
256	1.15	9.7	0
512	1.15	10.6	0
1024	1.15	11.5	0
2048	1.15	12.4	0
4096	1.15	13.3	0
8192	1.15	14.2	0

Fields

n_fft_real: usize

ifft_flag: bool

bit_reverse_flag: bool

re_table: &'static [u16]

im_table: &'static [u16]

Implementations

impl RfftI16

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

pub fn run(&self, input: &mut [i16], output: &mut [i16])