use alloc::sync::Arc;
use core::sync::atomic::{AtomicU32, Ordering};
use crate::{Frame, Signal};
pub struct Speed<T: ?Sized> {
speed: Arc<AtomicU32>,
inner: T,
}
impl<T> Speed<T> {
pub fn new(signal: T) -> (SpeedControl, Self) {
let signal = Self {
speed: Arc::new(AtomicU32::new(1.0f32.to_bits())),
inner: signal,
};
let control = SpeedControl(signal.speed.clone());
(control, signal)
}
}
impl<T: Signal> Signal for Speed<T>
where
T::Frame: Frame,
{
type Frame = T::Frame;
fn sample(&mut self, interval: f32, out: &mut [T::Frame]) {
let speed = f32::from_bits(self.speed.load(Ordering::Relaxed));
self.inner.sample(interval * speed, out);
}
fn is_finished(&self) -> bool {
self.inner.is_finished()
}
}
pub struct SpeedControl(Arc<AtomicU32>);
impl SpeedControl {
pub fn speed(&self) -> f32 {
f32::from_bits(self.0.load(Ordering::Relaxed))
}
pub fn set_speed(&mut self, factor: f32) {
self.0.store(factor.to_bits(), Ordering::Relaxed);
}
}