Struct spectrusty::audio::BlepAmpFilter

pub struct BlepAmpFilter<B>where
    B: Blep,{
    pub filter: <B as Blep>::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 as Blep>::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> BlepAmpFilter<B>where
    B: Blep,

pub fn build(
    filter: <B as Blep>::SampleDelta
) -> impl FnOnce(B) -> BlepAmpFilter<B>

pub fn new(filter: <B as Blep>::SampleDelta, blep: B) -> BlepAmpFilter<B>

Trait Implementations

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

type SampleDelta = <B as Blep>::SampleDelta

A type for sample ∆ amplitudes (pulse height).

fn ensure_frame_time(
    &mut self,
    sample_rate: u32,
    ts_rate: f64,
    frame_ts: i32,
    margin_ts: i32
)

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: i32) -> usize

Finalizes audio frame.

fn add_step(
    &mut self,
    channel: usize,
    timestamp: i32,
    delta: <BlepAmpFilter<B> as Blep>::SampleDelta
)

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

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

type Target = B

The resulting type after dereferencing.

fn deref(&self) -> &B

Dereferences the value.

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

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

Mutably dereferences the value.