play with FSK more

amps-handset-emu/src/audio.rs

@@ -1,20 +1,34 @@
-use cpal::{StreamConfig, traits::{DeviceTrait, HostTrait}};
+use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+use std::sync::{Arc, Mutex};
 
 pub fn play_audio(signal: &[f32]) -> Result<(), Box<dyn std::error::Error>> {
     let host = cpal::default_host();
-    let device = host.default_output_device()?.config();
+    let device = host.default_output_device().ok_or("No output device found")?;
     let config = device.default_output_config()?.config();
 
+    let signal = Arc::new(Mutex::new(signal.to_vec()));
+    let singal_clone = Arc::clone(&signal);
+    let mut index = 0;
+
     let stream = device.build_output_stream(
         &config,
         move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
-            data.copy_from_slice(&signal[..data.len()]);
+            let signal = singal_clone.lock().unwrap();
+
+            for sample in data.iter_mut() {
+                *sample = if index < signal.len() {
+                    signal[index]
+                } else {
+                    0.0
+                };
+                index += 1;
+            }
         },
         |err| eprintln!("Error: {:?}", err),
         None
     )?;
 
     stream.play()?;
-    std::thread::sleep(std::time::Duration::from_secs(5));
+    std::thread::sleep(std::time::Duration::from_secs(1));
     Ok(())
 }