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use std::time::Duration;
use Source;
#[derive(Clone, Debug)]
pub struct SineWave {
freq: f32,
num_sample: usize,
}
impl SineWave {
#[inline]
pub fn new(freq: u32) -> SineWave {
SineWave {
freq: freq as f32,
num_sample: 0,
}
}
}
impl Iterator for SineWave {
type Item = f32;
#[inline]
fn next(&mut self) -> Option<f32> {
self.num_sample = self.num_sample.wrapping_add(1);
let value = 2.0 * 3.14159265 * self.freq * self.num_sample as f32 / 48000.0;
Some(value.sin())
}
}
impl Source for SineWave {
#[inline]
fn get_current_frame_len(&self) -> Option<usize> {
None
}
#[inline]
fn get_channels(&self) -> u16 {
1
}
#[inline]
fn get_samples_rate(&self) -> u32 {
48000
}
#[inline]
fn get_total_duration(&self) -> Option<Duration> {
None
}
}