update audio_playback example with varied wav file formats to convert

examples/audio_playback/src/main.rs

@@ -14,16 +14,29 @@ struct AudioChannelStatus {
     playing: bool
 }
 
+fn load_and_convert_wav(path: &Path) -> Result<AudioBuffer> {
+    let sound = AudioBuffer::load_wav_file(path)?;
+    let original_spec = *sound.spec();
+    let sound = sound.convert(&TARGET_AUDIO_SPEC)?;
+    let final_spec = *sound.spec();
+    if original_spec != final_spec {
+        println!("{:?} was converted from {:?} to {:?}", path, original_spec, final_spec);
+    } else {
+        println!("{:?} did not need to be converted from {:?}", path, original_spec);
+    }
+    Ok(sound)
+}
+
 fn main() -> Result<()> {
     let mut system = SystemBuilder::new().window_title("Audio Playback").vsync(true).build()?;
 
     let mut is_running = true;
 
-    let sound1 = AudioBuffer::load_wav_file(Path::new("./assets/pickup-coin.wav"))?;
+    let sound1 = load_and_convert_wav(Path::new("./assets/pickup-coin.wav"))?;
-    let sound2 = AudioBuffer::load_wav_file(Path::new("./assets/powerup.wav"))?;
+    let sound2 = load_and_convert_wav(Path::new("./assets/powerup.wav"))?;
-    let sound3 = AudioBuffer::load_wav_file(Path::new("./assets/explosion.wav"))?;
+    let sound3 = load_and_convert_wav(Path::new("./assets/explosion.wav"))?;
-    let sound4 = AudioBuffer::load_wav_file(Path::new("./assets/jump.wav"))?;
+    let sound4 = load_and_convert_wav(Path::new("./assets/jump.wav"))?;
-    let sound5 = AudioBuffer::load_wav_file(Path::new("./assets/laser-shoot.wav"))?;
+    let sound5 = load_and_convert_wav(Path::new("./assets/laser-shoot.wav"))?;
 
     let mut statuses = [AudioChannelStatus { size: 0, position: 0, playing: false }; NUM_CHANNELS];