chore: improved on audio signature

frontends/sdl/src/audio.rs

@@ -9,12 +9,12 @@ pub struct Audio {
 }
 
 impl Audio {
-    pub fn new(sdl: &Sdl, freq: Option<i32>, channels: Option<u8>, samples: Option<u16>) -> Self {
+    pub fn new(sdl: &Sdl, freq: i32, channels: u8, samples: Option<u16>) -> Self {
         let audio_subsystem = sdl.audio().unwrap();
 
         let desired_spec = AudioSpecDesired {
-            freq: Some(freq.unwrap_or(44100)),
-            channels: Some(channels.unwrap_or(2)),
+            freq: Some(freq),
+            channels: Some(channels),
             samples: Some(samples.unwrap_or(4096)),
         };
 

frontends/sdl/src/main.rs

@@ -207,8 +207,8 @@ impl Emulator {
     pub fn start_audio(&mut self, sdl: &Sdl) {
         self.audio = Some(Audio::new(
             sdl,
-            Some(self.system.audio_sampling_rate() as i32),
-            Some(self.system.audio_channels()),
+            self.system.audio_sampling_rate() as i32,
+            self.system.audio_channels(),
             None,
         ));
     }