sl@0: // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include <e32std.h>
sl@0: #include "mmfBtSwCodecUtility.h"
sl@0: 
sl@0: 
sl@0: 
sl@0: /******************************************************************
sl@0:  * CMMFSwCodecUtility
sl@0:  ******************************************************************/
sl@0: CMMFSwCodecUtility::CMMFSwCodecUtility()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: 
sl@0: CMMFSwCodecUtility::~CMMFSwCodecUtility()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CMMFSwCodecUtility* CMMFSwCodecUtility::NewL()
sl@0: 	{
sl@0: 	CMMFSwCodecUtility* self = new(ELeave) CMMFSwCodecUtility();
sl@0: 	CleanupStack::PushL(self);
sl@0: 	self->ConstructL();
sl@0: 	CleanupStack::Pop();
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: void CMMFSwCodecUtility::ConstructL()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CMMFSwCodecUtility::ConfigAudioRamper(TInt64 aRampTime, TInt aSampleRate, TInt aChannels)
sl@0: 	{
sl@0: 	iRampSamples = I64LOW(((TInt64(aSampleRate) * aRampTime) /1000000 )); // Add this
sl@0: 	iRampSamplesLeft = iRampSamples;
sl@0: 	iChannels = aChannels;
sl@0: 	iRampIncr = 0;
sl@0: 	iSkip = ETrue;	                       
sl@0: 	}
sl@0: 
sl@0: TBool CMMFSwCodecUtility::RampAudio(CMMFDataBuffer* aBuffer)
sl@0: 	{
sl@0: 	TInt i=0;
sl@0: 	TInt length = aBuffer->Data().Length()>>1;
sl@0: 	TInt16* sample = REINTERPRET_CAST(TInt16*,&aBuffer->Data()[0]);
sl@0: 	TInt64 theResult(0);
sl@0: 	while ((i < length) && (iRampIncr < iRampSamples))
sl@0: 		{
sl@0: 		theResult = sample[i];
sl@0: 		theResult *= iRampIncr;
sl@0: 		theResult /= iRampSamples;
sl@0: 		sample[i] = STATIC_CAST(TInt16, I64LOW(theResult) );
sl@0:           
sl@0: 		if ((iChannels == 1) || (!iSkip))
sl@0: 			{
sl@0: 			iRampIncr++;
sl@0: 			}
sl@0: 		iSkip = !iSkip;
sl@0: 		i++;
sl@0: 		}
sl@0: 
sl@0: 	if (iRampIncr < iRampSamples)
sl@0: 		return ETrue;
sl@0: 	else
sl@0: 		return EFalse;
sl@0: 
sl@0: 	}
sl@0: