// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

//

// Description:

//

#include <e32std.h>

#include "mmfSwCodecUtility.h"

/******************************************************************

 * CMMFSwCodecUtility

 ******************************************************************/

CMMFSwCodecUtility::CMMFSwCodecUtility()

	{

	}

CMMFSwCodecUtility::~CMMFSwCodecUtility()

	{

	}

CMMFSwCodecUtility* CMMFSwCodecUtility::NewL()

	{

	CMMFSwCodecUtility* self = new(ELeave) CMMFSwCodecUtility();

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop();

	return self;

	}

void CMMFSwCodecUtility::ConstructL()

	{

	}

void CMMFSwCodecUtility::ConfigAudioRamper(TInt64 aRampTime, TInt aSampleRate, TInt aChannels)

	{

	iRampSamples = I64LOW(((TInt64(aSampleRate) * aRampTime) /1000000 )); // Add this

	iRampSamplesLeft = iRampSamples;

	iChannels = aChannels;

	iRampIncr = 0;

	iSkip = ETrue;	                       

	}

TBool CMMFSwCodecUtility::RampAudio(CMMFDataBuffer* aBuffer)

	{

	TInt i=0;

	TInt length = aBuffer->Data().Length()>>1;

	TInt16* sample = REINTERPRET_CAST(TInt16*,&aBuffer->Data()[0]);

	TInt64 theResult(0);

	while ((i < length) && (iRampIncr < iRampSamples))

		{

		theResult = sample[i];

		theResult *= iRampIncr;

		theResult /= iRampSamples;

		sample[i] = STATIC_CAST(TInt16, I64LOW(theResult) );

		if ((iChannels == 1) || (!iSkip))

			{

			iRampIncr++;

			}

		iSkip = !iSkip;

		i++;

		}

	if (iRampIncr < iRampSamples)

		return ETrue;

	else

		return EFalse;

	}