1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/mm/devsound/sounddevbt/src/swcodecwrapper/mmfBtSwCodecUtility.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,82 @@
     1.4 +// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#include <e32std.h>
    1.20 +#include "mmfBtSwCodecUtility.h"
    1.21 +
    1.22 +
    1.23 +
    1.24 +/******************************************************************
    1.25 + * CMMFSwCodecUtility
    1.26 + ******************************************************************/
    1.27 +CMMFSwCodecUtility::CMMFSwCodecUtility()
    1.28 +	{
    1.29 +	}
    1.30 +
    1.31 +
    1.32 +CMMFSwCodecUtility::~CMMFSwCodecUtility()
    1.33 +	{
    1.34 +	}
    1.35 +
    1.36 +CMMFSwCodecUtility* CMMFSwCodecUtility::NewL()
    1.37 +	{
    1.38 +	CMMFSwCodecUtility* self = new(ELeave) CMMFSwCodecUtility();
    1.39 +	CleanupStack::PushL(self);
    1.40 +	self->ConstructL();
    1.41 +	CleanupStack::Pop();
    1.42 +	return self;
    1.43 +	}
    1.44 +
    1.45 +void CMMFSwCodecUtility::ConstructL()
    1.46 +	{
    1.47 +	}
    1.48 +
    1.49 +void CMMFSwCodecUtility::ConfigAudioRamper(TInt64 aRampTime, TInt aSampleRate, TInt aChannels)
    1.50 +	{
    1.51 +	iRampSamples = I64LOW(((TInt64(aSampleRate) * aRampTime) /1000000 )); // Add this
    1.52 +	iRampSamplesLeft = iRampSamples;
    1.53 +	iChannels = aChannels;
    1.54 +	iRampIncr = 0;
    1.55 +	iSkip = ETrue;	                       
    1.56 +	}
    1.57 +
    1.58 +TBool CMMFSwCodecUtility::RampAudio(CMMFDataBuffer* aBuffer)
    1.59 +	{
    1.60 +	TInt i=0;
    1.61 +	TInt length = aBuffer->Data().Length()>>1;
    1.62 +	TInt16* sample = REINTERPRET_CAST(TInt16*,&aBuffer->Data()[0]);
    1.63 +	TInt64 theResult(0);
    1.64 +	while ((i < length) && (iRampIncr < iRampSamples))
    1.65 +		{
    1.66 +		theResult = sample[i];
    1.67 +		theResult *= iRampIncr;
    1.68 +		theResult /= iRampSamples;
    1.69 +		sample[i] = STATIC_CAST(TInt16, I64LOW(theResult) );
    1.70 +          
    1.71 +		if ((iChannels == 1) || (!iSkip))
    1.72 +			{
    1.73 +			iRampIncr++;
    1.74 +			}
    1.75 +		iSkip = !iSkip;
    1.76 +		i++;
    1.77 +		}
    1.78 +
    1.79 +	if (iRampIncr < iRampSamples)
    1.80 +		return ETrue;
    1.81 +	else
    1.82 +		return EFalse;
    1.83 +
    1.84 +	}
    1.85 +