--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/inc/ProcFrameHandler.h	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,98 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - Initial contribution
+*
+* Contributors:
+* Ixonos Plc
+*
+* Description:  
+*
+*/
+
+
+
+#ifndef __CPROCFRAMEHANDLER_H__
+#define __CPROCFRAMEHANDLER_H__
+
+#include <e32base.h>
+#include "AudCommon.h"
+#include "ProcConstants.h"
+
+class CProcFrameHandler : public CBase 
+    {
+
+public:
+
+
+    /**
+    * Manipulates the gain of a certain audio frame
+    *
+    * @param    aFrameIn        a frame to be modified
+    * @param    aFrameOut    a modified frame, the caller is responsible for releasing!
+    * @param    aGain        gain change. One step represents 0.5 dB, so that
+    *                        0->no change, 10 -> +5dB and -10 -> -5dB
+    * @return    ETrue        if successful
+    *
+    *
+    */
+    virtual TBool ManipulateGainL(const HBufC8* aFrameIn, HBufC8*& aFrameOut, TInt8 aGain) = 0;
+
+    /**
+    * Retrieves the gains of a certain audio frame
+    *
+    * @param    aFrame    an audio frame
+    * @param    aGains    retrieved gains
+    * @param    aMaxGain the biggest possible gain value
+    * @return    ETrue    if successful
+    *
+    *
+    */
+    virtual TBool GetGainL(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain) const = 0;
+
+    /**
+    * Calculates how many decibels this frame can be amplified
+    *
+    * @param aFrame        an audio frame
+    * @param aMargin    margin in debicels/2 -> 4 equals 2 decibels    
+    */
+    virtual TBool GetNormalizingMargin(const HBufC8* aFrame, TInt8& aMargin) const = 0;
+
+    /**
+    * Tells whether mixing is available or not
+    *
+    * @return ETrue        mixing is available
+    * @return EFalse    mixing is not available
+    */
+    virtual TBool IsMixingAvailable() const;
+
+    /**
+    * Mixes two frames with each other
+    *
+    * @param aFrame1        frame 1 to be mixed
+    * @param aFrame2        frame 2 to be mixed
+    * @param aMixedFrame    resulting mixed frame
+    *
+    * @return                ETrue if mixing was successful. The caller is responsible for releasing memory
+    *                        EFalse if mixing was not successful. aMixedFrame = 0 and the caller
+    *                                doesn't need to release memory
+    */
+    virtual TBool MixL(const HBufC8* aFrame1, const HBufC8* aFrame2, HBufC8*& aMixedFrame);
+
+
+    virtual ~CProcFrameHandler();
+
+private:
+
+protected:
+
+    
+    };
+
+#endif