console: implement AudioSource.gain

lime/audio/AudioSource.hx

@@ -46,6 +46,7 @@ class AudioSource {
 	private var channel:SoundChannel;
 	#elseif lime_console
 	private var channel:FMODChannel;
+	private var __gain:Float = 1.0;
 	#end
 	
 	#if (cpp || neko || nodejs)
@@ -164,7 +165,10 @@ class AudioSource {
 		} else {
 			
 			channel = buffer.src.play ();
-			channel.setLoopCount (this.__loops);
+			channel.setLoopCount (__loops);
+			if (__gain < 1.0) {
+				channel.setVolume (__gain);
+			}
 			
 			var old = setFmodActive (channel, this);
 			
@@ -484,8 +488,13 @@ class AudioSource {
 
 		#elseif lime_console
 
-		lime.Lib.notImplemented ("AudioSource.get_gain");
-		return 1;
+		if (channel.valid) {
+			
+			__gain = channel.getVolume ();
+			
+		}
+
+		return __gain;
 		
 		#else
 		
@@ -511,8 +520,13 @@ class AudioSource {
 
 		#elseif lime_console
 
-		lime.Lib.notImplemented ("AudioSource.set_gain");
-		return value;
+		if (channel.valid) {
+			
+			channel.setVolume (value);
+			
+		}
+
+		return __gain = value;
 		
 		#else
 		

lime/audio/fmod/FMODChannel.hx

@@ -31,6 +31,12 @@ extern class FMODChannel {
 	// setLoopCount sets the channel to loop count times before stopping.
 	public function setLoopCount (count:Int):Void;
 
+	// getVolume retrieves the current linear volume level of the channel.
+	public function getVolume ():cpp.Float32;
+
+	// setVolume sets the channel's linear volume level.
+	public function setVolume (volume:cpp.Float32):Void;
+
 
 	// INVALID represents an invalid channel handle
 	public static var INVALID (get, never):FMODChannel;