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diff --git a/indra/llaudio/llaudioengine_fmod.h b/indra/llaudio/llaudioengine_fmod.h
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+++ b/indra/llaudio/llaudioengine_fmod.h
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+/** 
+ * @file audioengine_fmod.h
+ * @brief Definition of LLAudioEngine class abstracting the audio
+ * support as a FMOD 3D implementation
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * 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;
+ * version 2.1 of the License only.
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_AUDIOENGINE_FMOD_H
+#define LL_AUDIOENGINE_FMOD_H
+
+#include "llaudioengine.h"
+#include "lllistener_fmod.h"
+#include "llwindgen.h"
+
+#include "fmod.h"
+
+class LLAudioStreamManagerFMOD;
+
+class LLAudioEngine_FMOD : public LLAudioEngine 
+{
+public:
+	LLAudioEngine_FMOD();
+	virtual ~LLAudioEngine_FMOD();
+
+	// initialization/startup/shutdown
+	virtual bool init(const S32 num_channels, void *user_data);
+       	virtual std::string getDriverName(bool verbose);
+	virtual void allocateListener();
+
+	virtual void shutdown();
+
+	/*virtual*/ bool initWind();
+	/*virtual*/ void cleanupWind();
+
+	/*virtual*/void updateWind(LLVector3 direction, F32 camera_height_above_water);
+
+#if LL_DARWIN
+	typedef S32 MIXBUFFERFORMAT;
+#else
+	typedef S16 MIXBUFFERFORMAT;
+#endif
+
+protected:
+	/*virtual*/ LLAudioBuffer *createBuffer(); // Get a free buffer, or flush an existing one if you have to.
+	/*virtual*/ LLAudioChannel *createChannel(); // Create a new audio channel.
+
+	/*virtual*/ void setInternalGain(F32 gain);
+protected:
+	static signed char F_CALLBACKAPI callbackMetaData(char* name, char* value, void* userdata);
+
+	//F32 mMinDistance[MAX_BUFFERS];
+	//F32 mMaxDistance[MAX_BUFFERS];
+
+	bool mInited;
+
+	// On Windows, userdata is the HWND of the application window.
+	void* mUserData;
+
+	LLWindGen<MIXBUFFERFORMAT> *mWindGen;
+	FSOUND_DSPUNIT *mWindDSP;
+};
+
+
+class LLAudioChannelFMOD : public LLAudioChannel
+{
+public:
+	LLAudioChannelFMOD();
+	virtual ~LLAudioChannelFMOD();
+
+protected:
+	/*virtual*/ void play();
+	/*virtual*/ void playSynced(LLAudioChannel *channelp);
+	/*virtual*/ void cleanup();
+	/*virtual*/ bool isPlaying();
+
+	/*virtual*/ bool updateBuffer();
+	/*virtual*/ void update3DPosition();
+	/*virtual*/ void updateLoop();
+
+protected:
+	int mChannelID;
+	S32 mLastSamplePos;
+};
+
+
+class LLAudioBufferFMOD : public LLAudioBuffer
+{
+public:
+	LLAudioBufferFMOD();
+	virtual ~LLAudioBufferFMOD();
+
+	/*virtual*/ bool loadWAV(const std::string& filename);
+	/*virtual*/ U32 getLength();
+	friend class LLAudioChannelFMOD;
+
+	void set3DMode(bool use3d);
+protected:
+	FSOUND_SAMPLE *getSample()	{ return mSamplep; }
+protected:
+	FSOUND_SAMPLE *mSamplep;
+};
+
+
+#endif // LL_AUDIOENGINE_FMOD_H