Struct spectrusty_core::audio::BlepAmpFilter

pub struct BlepAmpFilter<B: Blep> {
    pub filter: B::SampleDelta,
    pub blep: B,
}

A wrapper Blep implementation that filters pulses' ∆ amplitude before sending them to the underlying implementation.

BlepAmpFilter may be used to adjust generated audio volume dynamically.

NOTE: To emulate a linear volume control, filter value should be scaled logarithmically.

Fields

filter: B::SampleDelta

A normalized filter value in the range [0.0, 1.0] (floats) or [0, int::max_value()] (integers).

blep: B

A downstream Blep implementation.

Implementations

impl<B: Blep> BlepAmpFilter<B>

pub fn build(filter: B::SampleDelta) -> impl FnOnce(B) -> Self

pub fn new(filter: B::SampleDelta, blep: B) -> Self

Trait Implementations

impl<B> Blep for BlepAmpFilter<B> where
    B: Blep,
    B::SampleDelta: MulNorm + SampleDelta, 

type SampleDelta = B::SampleDelta

A type for sample ∆ amplitudes (pulse height).

fn ensure_frame_time(
    &mut self,
    sample_rate: u32,
    ts_rate: f64,
    frame_ts: FTs,
    margin_ts: FTs
)

This method allows the Blep implementation to reserve enough memory for the audio frame with an additional margin and to set up a sample time rate and other internals.

fn end_frame(&mut self, timestamp: FTs) -> usize

Finalizes audio frame.

fn add_step(&mut self, channel: usize, timestamp: FTs, delta: Self::SampleDelta)

This method is being used to add square-wave pulse steps within a boundary of a single frame.

impl<B: Blep> Deref for BlepAmpFilter<B>

type Target = B

The resulting type after dereferencing.

fn deref(&self) -> &B

Dereferences the value.

impl<B: Blep> DerefMut for BlepAmpFilter<B>

fn deref_mut(&mut self) -> &mut B

Mutably dereferences the value.