Implement CHIP-8 Beep

src/periph.rs

@@ -1,3 +1,6 @@
+use rodio::{source::SineWave, Sink};
+use std::time::{Duration, Instant};
+
 #[derive(Copy, Clone)]
 pub struct Display {
     pub buf: [u8; Self::WIDTH as usize * Self::HEIGHT as usize],
@@ -85,9 +88,32 @@ impl Timer {
 
             if self.remaining == 0 {
                 self.enabled = false;
+                println!("Beep!");
+                Self::beep();
             }
         }
     }
+
+    fn beep() {
+        let maybe_device = rodio::default_output_device();
+        let beep = SineWave::new(440);
+
+        // TODO: Fix Pop when sound ends?
+        if let Some(device) = maybe_device {
+            std::thread::spawn(move || {
+                let sink = Sink::new(&device);
+                let duration = Duration::from_millis(100);
+                let start = Instant::now();
+                sink.append(beep);
+
+                loop {
+                    if Instant::now().duration_since(start) > duration {
+                        break;
+                    }
+                }
+            });
+        }
+    }
 }
 
 #[derive(Debug, Copy, Clone)]