41 lines
1.4 KiB
Rust
41 lines
1.4 KiB
Rust
extern crate cpal;
|
|
|
|
fn main() {
|
|
let endpoint = cpal::get_default_endpoint().unwrap();
|
|
let format = endpoint.get_supported_formats_list().unwrap().next().unwrap();
|
|
let mut channel = cpal::Voice::new(&endpoint, &format).unwrap();
|
|
|
|
// Produce a sinusoid of maximum amplitude.
|
|
let mut data_source = (0u64..).map(|t| t as f32 * 0.03)
|
|
.map(|t| t.sin());
|
|
|
|
loop {
|
|
match channel.append_data(32768) {
|
|
cpal::UnknownTypeBuffer::U16(mut buffer) => {
|
|
for (sample, value) in buffer.chunks_mut(2).zip(&mut data_source) {
|
|
let value = ((value * 0.5 + 0.5) * std::u16::MAX as f32) as u16;
|
|
sample[0] = value;
|
|
sample[1] = value;
|
|
}
|
|
},
|
|
|
|
cpal::UnknownTypeBuffer::I16(mut buffer) => {
|
|
for (sample, value) in buffer.chunks_mut(2).zip(&mut data_source) {
|
|
let value = (value * std::i16::MAX as f32) as i16;
|
|
sample[0] = value;
|
|
sample[1] = value;
|
|
}
|
|
},
|
|
|
|
cpal::UnknownTypeBuffer::F32(mut buffer) => {
|
|
for (sample, value) in buffer.chunks_mut(2).zip(&mut data_source) {
|
|
sample[0] = value;
|
|
sample[1] = value;
|
|
}
|
|
},
|
|
}
|
|
|
|
channel.play();
|
|
}
|
|
}
|