Support locking audio via audio::engine

libs/audio/include/psemek/audio/engine.hpp

@@ -39,6 +39,9 @@ namespace psemek::audio
 
 		std::shared_ptr<stream> play(std::shared_ptr<track> s, bool start = true, bool loop = false);
 
+		void lock();
+		void unlock();
+
 	private:
 		psemek_declare_shared_pimpl
 	};

libs/audio/source/engine.cpp

@@ -347,4 +347,14 @@ namespace psemek::audio
 		return str;
 	}
 
+	void engine::lock()
+	{
+		SDL_LockAudio();
+	}
+
+	void engine::unlock()
+	{
+		SDL_UnlockAudio();
+	}
+
 }