Allow mods to control how looped sounds are used.

OpenRA.Game/Sound/Sound.cs

@@ -129,9 +129,14 @@ namespace OpenRA
 			soundEngine.StopAllSounds();
 		}
 
-		public void EndLoop(ISound sound)
+		public void SetLooped(ISound sound, bool looped)
 		{
-			soundEngine.SetSoundLooping(false, sound);
+			soundEngine.SetSoundLooping(looped, sound);
+		}
+
+		public void SetPosition(ISound sound, WPos position)
+		{
+			soundEngine.SetSoundPosition(sound, position);
 		}
 
 		public void MuteAudio()

OpenRA.Game/Sound/SoundDevice.cs

@@ -29,6 +29,7 @@ namespace OpenRA
 		void SetListenerPosition(WPos position);
 		void SetSoundVolume(float volume, ISound music, ISound video);
 		void SetSoundLooping(bool looping, ISound sound);
+		void SetSoundPosition(ISound sound, WPos position);
 	}
 
 	public class SoundDevice

OpenRA.Platforms.Default/DummySoundEngine.cs

@@ -57,6 +57,7 @@ namespace OpenRA.Platforms.Default
 		public void StopAllSounds() { }
 		public void SetListenerPosition(WPos position) { }
 		public void SetSoundLooping(bool looping, ISound sound) { }
+		public void SetSoundPosition(ISound sound, WPos position) { }
 		public void Dispose() { }
 	}
 

OpenRA.Platforms.Default/OpenAlSoundEngine.cs

@@ -350,6 +350,11 @@ namespace OpenRA.Platforms.Default
 			((OpenAlSound)sound)?.SetLooping(looping);
 		}
 
+		public void SetSoundPosition(ISound sound, WPos position)
+		{
+			((OpenAlSound)sound)?.SetPosition(position);
+		}
+
 		~OpenAlSoundEngine()
 		{
 			Dispose(false);