synth.rs

gistfile1.rs

use cpal;
use cpal::EventLoop;
use std::thread;
use std::time::Duration;
use std::sync::mpsc;
mod osc;

fn main() {
     let event_loop = EventLoop::new();
    
    let device = match cpal::default_output_device() {
        Some(dev) => {
            println!("Sound Device Found");
            dev
        },
        None => panic!(),
    };

    println!("Using device: {}", device.name());

    let mut supported_formats_range = device.supported_output_formats()
        .expect("error while querying formats");

    let format = supported_formats_range.next()
        .expect("no supported format?!")
        .with_max_sample_rate();

    let sample_rate = format.sample_rate.0 as f32;
    println!("Sample Rate: {}", sample_rate);
    
    let stream_id = event_loop.build_output_stream(&device, &format).unwrap();
    event_loop.play_stream(stream_id);

    let (tx, rx) = mpsc::channel(); 

    let audio_thread = thread::spawn(move|| {
          
        
        tx.send(String::from("hello")).unwrap();
    
        let mut osc_pitch = osc::OSC {
            sample: 0.0,
            sample_clock: 0.0,
            freq: 60.0,
            sample_rate: sample_rate,
            gain: 1.0,
            offset: 0.0,
            scale: 1.0,
        };

        let mut lfo = osc::OSC {
            sample: 0.0,
            sample_clock: 0.0,
            freq: 0.1,
            sample_rate: sample_rate,
            gain: 100.0,
            offset: 90.0,
            scale: 0.5,
        };
        
        let mut next_value = || {
            osc_pitch.freq = lfo.get_next_sample();
            osc_pitch.get_next_sample()
        };

        event_loop.run(move |_, data| {
            match data {
                cpal::StreamData::Output { buffer: cpal::UnknownTypeOutputBuffer::F32(mut buffer) } => {
                    for sample in buffer.chunks_mut(format.channels as usize) {
                        let value = next_value();
                        for out in sample.iter_mut() {
                            *out = value;
                        }
                    }
                },
                _ => (),
            }
        });
    });


    loop {
        let got = rx.recv().unwrap();
        println!("Got: {}", got);
    }

    audio_thread.join().unwrap();
}