Hello,
I'm trying to output a simple sound (a square waveform). All seems to work except no sound is going to my speakers. I found cpal as a lib to manage sound, but maybe there is a better way to handle streams. Here is my code
use cpal::{Sample};
use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
fn main() {
let err_fn = |err| eprintln!("an error occurred on the output audio stream: {}", err);
let host = cpal::default_host();
let device = host.default_output_device().expect("no output device available");
let supported_config = device.default_output_config().unwrap();
println!("Device: {}, Using config: {:?}", device.name().expect("flute"), supported_config);
let config = supported_config.into();
let stream = device.build_output_stream(&config, write_silence, err_fn).unwrap();
stream.play().unwrap();
std::thread::sleep(std::time::Duration::from_millis(3000));
}
fn write_silence(data: &mut [f32], _: &cpal::OutputCallbackInfo) {
let mut counter = 0;
for sample in data.iter_mut() {
let s = if (counter / 20) % 2 == 0 { &1.0 } else { &0.0 };
counter = counter + 1;
*sample = Sample::from(s);
}
println!("{:?}", data);
}
line 27 (println!("{:?}", data)) does output the samples of a square waveform.
I'm running this in the linux/crostini thing of chromebooks. It can be the problem.
Does anyone knows why it's not working ? And is cpal a good start for audio processing ?