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diff --git a/src/audio/AudioEngine.h b/src/audio/AudioEngine.h
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+++ b/src/audio/AudioEngine.h
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+//
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Current versions can be found at www.libavg.de
+//
+//  Original author of this file is Nick Hebner (hebnern@gmail.com).
+//
+
+#ifndef _AudioEngine_H_
+#define _AudioEngine_H_
+
+#include "../api.h"
+#include "AudioSource.h"
+#include "AudioParams.h"
+#include "AudioBuffer.h"
+#include "IProcessor.h"
+
+#include <SDL/SDL.h>
+
+#include <boost/thread/mutex.hpp>
+
+#include <map>
+
+namespace avg {
+
+typedef std::map<int, AudioSourcePtr> AudioSourceMap;
+
+class AVG_API AudioEngine
+{
+    public:
+        static AudioEngine* get();
+        AudioEngine();
+        virtual ~AudioEngine();
+
+        int getChannels();
+        int getSampleRate();
+        const AudioParams * getParams();
+
+        void setAudioEnabled(bool bEnabled);
+        
+        void init(const AudioParams& ap, float volume);
+        void teardown();
+        
+        void play();
+        void pause();
+        
+        int addSource(AudioMsgQueue& dataQ, AudioMsgQueue& statusQ);
+        void removeSource(int id);
+        void pauseSource(int id);
+        void playSource(int id);
+        void notifySeek(int id);
+        void setSourceVolume(int id, float volume);
+
+        void setVolume(float volume);
+        float getVolume() const;
+        bool isEnabled() const;
+        
+    private:
+        void mixAudio(Uint8 *pDestBuffer, int destBufferLen);
+        static void audioCallback(void *userData, Uint8 *audioBuffer, int audioBufferLen);
+        void addBuffers(float *pDest, AudioBufferPtr pSrc);
+        void calcVolume(float *pBuffer, int numSamples, float volume);
+        
+        AudioParams m_AP;
+        AudioBufferPtr m_pTempBuffer;
+        float * m_pMixBuffer;
+        IProcessor<float>* m_pLimiter;
+        boost::mutex m_Mutex;
+
+        bool m_bEnabled;
+        AudioSourceMap m_AudioSources;
+        float m_Volume;
+        
+        static AudioEngine* s_pInstance;
+};
+
+}
+
+#endif