Struct Spectrogram 

pub struct Spectrogram {
    pub sample_rate: u32,
    pub fft_size: usize,
    pub hop: usize,
    pub bins: usize,
    pub data: Vec<f32>,
}

A magnitude spectrogram: a column per time frame, each holding bins frequency rows (row 0 = DC, row bins-1 = Nyquist), in decibels.

Fields

sample_rate: u32

Source sample rate, Hz.

fft_size: usize

FFT size used (frequency resolution = sample_rate / fft_size).

hop: usize

Hop between successive frames, in samples.

bins: usize

Frequency bins per frame (fft_size / 2 + 1).

data: Vec<f32>

Row-major dB magnitudes laid out as data[frame * bins + bin].

Implementations

impl Spectrogram

pub fn frames(&self) -> usize

Number of time frames.

pub fn get(&self, frame: usize, bin: usize) -> f32

dB magnitude at (frame, bin).

pub fn bin_hz(&self, bin: usize) -> f32

Centre frequency (Hz) of a bin.

pub fn frame_time(&self, frame: usize) -> f32

Start time (seconds) of a frame.

Trait Implementations

impl Clone for Spectrogram

fn clone(&self) -> Spectrogram

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Spectrogram

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.