Struct EncoderMdctState 

pub struct EncoderMdctState {
    pub n: u32,
    pub history: Vec<f32>,
}

Per-channel forward-MDCT analysis state — carries the last N input samples so the next frame can window across the 50% TDAC boundary.

Fields

n: u32

Transform length (samples per output spectrum). The MDCT consumes 2N samples per call (last N from history + this frame’s N new).

history: Vec<f32>

Last N input PCM samples for the next-frame overlap.

Implementations

impl EncoderMdctState

pub fn new(n: u32) -> Self

Fresh encoder state with N-sample zero history (TDAC priming — the very first encoded frame will lose half a window of energy at the leading edge, identical to the decoder’s first-frame behaviour).

pub fn analyse_frame(&mut self, frame: &[f32]) -> Vec<f32>

Push a fresh N-sample frame of input PCM through the windowed forward MDCT and return the N spectral coefficients. The caller owns the input buffer — this method consumes it logically (copies into the state).

Trait Implementations

impl Clone for EncoderMdctState

fn clone(&self) -> EncoderMdctState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EncoderMdctState

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

Formats the value using the given formatter.