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#[derive(Debug, Clone)]
pub struct Signal {
pub samples: Vec<f32>,
pub sample_rate: f32
}
impl Signal {
pub fn empty() -> Signal {
Signal::default()
}
pub fn new(samples: &[f32], sample_rate: f32) -> Signal {
Signal {
samples: Signal::remove_mean_offset(samples),
sample_rate: sample_rate
}
}
fn remove_mean_offset(samples: &[f32]) -> Vec<f32> {
let mean = samples.iter().sum::<f32>()/samples.len() as f32;
samples.iter().map(|x| x - mean).collect()
}
pub fn aligned_to_rising_edge(&self) -> &[f32] {
let rising_edge = self.samples
.iter()
.enumerate()
.skip_while(|&(_,x)| !x.is_sign_negative())
.skip_while(|&(_,x)| x.is_sign_negative())
.map(|(i,_)| i)
.next().unwrap_or(0);
&self.samples[rising_edge..]
}
pub fn is_silence(&self) -> bool {
self.samples.iter().all(|&x| x.abs() < 0.05)
}
}
impl Default for Signal {
fn default() -> Signal {
Signal {
samples: Vec::new(),
sample_rate: 44100.0
}
}
}
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