Fix audio feature

Cargo.toml

@@ -14,6 +14,7 @@ assetpath = { git = "https://gavania.de/hodasemi/vulkan_lib.git" }
 anyhow = { version = "1.0.68", features = ["backtrace"] }
 cgmath = "0.18.0"
 
+# optional
+audio = { git = "https://gavania.de/hodasemi/audio.git", optional = true }
+
 [features]
-audio = []
-# audio = ["context/sound"]

src/context_interface.rs

@@ -2,6 +2,9 @@ use std::sync::{Arc, Mutex};
 
 use vulkan_rs::prelude::*;
 
+#[cfg(feature = "audio")]
+use audio::*;
+
 pub trait ContextInterface: Send + Sync {
     fn device(&self) -> &Arc<Device>;
     fn queue(&self) -> &Arc<Mutex<Queue>>;
@@ -13,6 +16,9 @@ pub trait ContextInterface: Send + Sync {
     fn images(&self) -> TargetMode<Vec<Arc<Image>>>;
     fn width(&self) -> u32;
     fn height(&self) -> u32;
+
+    #[cfg(feature = "audio")]
+    fn sound_handler(&self) -> &mut SoundHandler;
 }
 
 pub enum TargetMode<T> {

src/guihandler/gui/audible.rs

@@ -4,6 +4,9 @@ use crate::prelude::*;
 use anyhow::Result;
 use assetpath::AssetPath;
 
+#[cfg(feature = "audio")]
+use audio::*;
+
 use std::sync::Arc;
 
 /// `Audible` gives the ability to play a sound
@@ -19,11 +22,11 @@ impl Audible {
             path.set_prefix(&gui_handler.resource_base_path().full_path());
         }
 
-        let sound =
-            gui_handler
-                .context()
-                .sound()
-                .load_sound(path, "gui", SoundInterpretation::Generic)?;
+        let sound = gui_handler.context().sound_handler().load_sound(
+            path,
+            "gui",
+            SoundInterpretation::Generic,
+        )?;
 
         Ok(Arc::new(Audible { gui_handler, sound }))
     }
@@ -39,7 +42,7 @@ impl Drop for Audible {
     fn drop(&mut self) {
         self.gui_handler
             .context()
-            .sound()
+            .sound_handler()
             .remove_sound(&self.sound)
             .unwrap();
     }

src/guihandler/guihandler.rs

@@ -271,7 +271,7 @@ impl GuiHandler {
     }
 
     #[cfg(feature = "audio")]
-    pub(crate) fn context(&self) -> &Arc<Context> {
+    pub(crate) fn context(&self) -> &Arc<dyn ContextInterface> {
         &self.context
     }