openalsoft audio fix

Co-authored-by: Smokey <78874128+Smokey555@users.noreply.github.com>
Co-authored-by: Cobalt Bar <79053181+CobaltBar@users.noreply.github.com>

alsoft.txt

@@ -0,0 +1,14 @@
+[general]
+sample-type=float32
+stereo-mode=speakers
+stereo-encoding=panpot
+hrtf=false
+cf_level=0
+resampler=fast_bsinc24
+front-stablizer=false
+output-limiter=false
+volume-adjust=0
+[decoder]
+hq-mode=false
+distance-comp=false
+nfc=false

project.hxp

@@ -266,6 +266,7 @@ class Project extends HXProject {
     configureHaxelibs();
     configureAssets();
     configureIcons();
+    configureALSoft();
 	}
 
 	/**
@@ -740,6 +741,15 @@ class Project extends HXProject {
 		addIcon("art/iconOG.png");
   }
 
+  /**
+   * For desktop platforms, copy the OpenALSoft config file into the build to improve audio quality.
+   */
+  function configureALSoft() {
+    if (isDesktop()) {
+      addAsset("alsoft.txt", 'plugins/alsoft.${isWindows() ? "ini" : "conf"}', "default", false);
+    }
+  }
+
 	//
 	// HELPER FUNCTIONS
 	// Easy functions to make the code more readable.

source/Main.hx

@@ -3,6 +3,9 @@ package;
 import flixel.FlxGame;
 import flixel.FlxState;
 import funkin.Preferences;
+#if desktop
+import funkin.audio.ALSoftConfig; // Just to make sure DCE doesn't remove this, since it's not directly referenced anywhere else.
+#end
 import funkin.util.logging.CrashHandler;
 import funkin.ui.debug.MemoryCounter;
 import funkin.save.Save;

source/funkin/audio/ALSoftConfig.hx

@@ -0,0 +1,31 @@
+package funkin.audio;
+
+import haxe.io.Path;
+
+/*
+ * A class that simply points OpenALSoft to a custom configuration file when
+ * the game starts up.
+ *
+ * The config overrides a few global OpenALSoft settings with the aim of
+ * improving audio quality on desktop targets.
+ */
+@:keep class ALSoftConfig
+{
+  #if desktop
+  static function __init__():Void
+  {
+    var origin:String = #if hl Sys.getCwd() #else Sys.programPath() #end;
+
+    var configPath:String = Path.directory(Path.withoutExtension(origin));
+    #if windows
+    configPath += "/plugins/alsoft.ini";
+    #elseif mac
+    configPath = Path.directory(configPath) + "/Resources/plugins/alsoft.conf";
+    #else
+    configPath += "/plugins/alsoft.conf";
+    #end
+
+    Sys.putEnv("ALSOFT_CONF", configPath);
+  }
+  #end
+}