Struct Fft 

pub struct Fft {
    pub n: usize,
    pub window: Vec<f32>,
    pub mag_scale: f32,
    /* private fields */
}

A planned forward/inverse real FFT pair with scratch buffers.

Fields

n: usize

window: Vec<f32>

mag_scale: f32

Scale that maps |X| to the dBFS-sine magnitude scale.

Implementations

impl Fft

pub fn new(n: usize) -> Fft

pub fn bins(&self) -> usize

pub fn forward(&mut self, frame: &[f32], spec: &mut [Complex32])

Window frame (length n) and transform it into spec (length n/2+1).

pub fn forward_split(&mut self, a: &[f32], b: &[f32], spec: &mut [Complex32])

Forward transform of a frame given as two pieces (ring-buffer order).

pub fn inverse_windowed(&mut self, spec: &mut [Complex32]) -> &[f32]

Inverse transform spec (modified in place as scratch) and return the windowed, overlap-add normalized time frame. Summing these at hop n/4 reconstructs the input.