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use crate::{Millisecond, Amplitude};
pub struct Envelope {
attack: Vec<Amplitude>,
decay: Vec<Amplitude>,
release: Vec<Amplitude>,
}
impl Envelope {
pub fn new(attack: Millisecond, decay: Millisecond, sustain: Amplitude, release: Millisecond) -> Self {
let attack = vec![sustain; attack as usize];
let decay = vec![sustain; decay as usize];
let release = vec![sustain; release as usize];
Self{attack, decay, release}
}
pub fn len(&self) -> usize {
self.attack.len() + self.decay.len() + self.release.len()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_has_expected_total_length() {
let total = Envelope::new(10, 10, 1.0, 10).len();
assert_eq! (30, total)
}
}
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