Struct Mixer 

pub struct Mixer {
    pub mic_gain: f32,
    pub loopback_gain: f32,
    pub drift_frames: u64,
    /* private fields */
}

Fields

mic_gain: f32

loopback_gain: f32

drift_frames: u64

Counts iterations where mic vs loopback length difference exceeded HOLD_SAMPLES. Callers can read this to decide whether to nudge the APM stream delay (drift > 250ms beyond seed risks AEC3 divergence — see APM_PLAYBACK_DELAY_MS).

Implementations

impl Mixer

pub fn mix(&mut self, mic: &[i16], loopback: &[i16]) -> Vec<i16>

Allocate a fresh output buffer. Convenience for tests; the hot capture loop should use mix_into to recycle a Vec<i16>. #[allow(dead_code)] because production callers always use mix_into — keeping the alloc’ing helper for test ergonomics.

pub fn mix_into(&mut self, mic: &[i16], loopback: &[i16], out: &mut Vec<i16>)

Mix mic + loopback into the caller-supplied out buffer. Resizes out to max(mic.len(), loopback.len()) and writes per-sample (mic[i]*g_mic + loopback[i]*g_lp) with sample-and-hold padding on the shorter side. Reusing out between calls is the entire point — the audio thread runs at 10Hz and cannot afford a 6.4KB alloc per tick.

Trait Implementations

impl Default for Mixer

fn default() -> Self

Returns the “default value” for a type.