Method next

perro_source/audio_stack/perro_pawdio/src/dsp.rs:178–209

(&mut self)

            wet_active: false,
            low_state: vec![0.0; channels],
            eq_low_state: vec![0.0; channels],
            eq_high_prev_in: vec![0.0; channels],
            eq_high_prev_out: vec![0.0; channels],
            echo: initially_wet
                .then(|| DelayLine::new(delay_len(sample_rate, channels, 0.18), 0.32)),
            reverb_a: initially_wet
                .then(|| DelayLine::new(delay_len(sample_rate, channels, 0.047), 0.62)),
            reverb_b: initially_wet
                .then(|| DelayLine::new(delay_len(sample_rate, channels, 0.071), 0.54)),
        }
    }
}

impl<S> Iterator for DspSource<S>
where
    S: Source<Item = f32>,
{
    type Item = f32;

    fn next(&mut self) -> Option<Self::Item> {
        let input = self.input.next()?;
        // First call (counter 0) always snapshots; refresh every N samples.
        if self.param_counter == 0 {
            self.params = self.control.snapshot();
        }
        self.param_counter += 1;
        if self.param_counter >= PARAM_REFRESH_SAMPLES {
            self.param_counter = 0;
        }
        let params = self.params;
        let ch = self.channel_index.min(self.channels - 1);
        let mut sample = input;

        // Unity EQ is an identity passthrough; skip the two filter updates.
        if !eq_is_dry(params.eq) {