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// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include <e32std.h>
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#include "mmfSwCodecUtility.h"
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/******************************************************************
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* CMMFSwCodecUtility
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******************************************************************/
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CMMFSwCodecUtility::CMMFSwCodecUtility()
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{
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}
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CMMFSwCodecUtility::~CMMFSwCodecUtility()
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{
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}
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CMMFSwCodecUtility* CMMFSwCodecUtility::NewL()
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{
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CMMFSwCodecUtility* self = new(ELeave) CMMFSwCodecUtility();
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CleanupStack::PushL(self);
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self->ConstructL();
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CleanupStack::Pop();
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return self;
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}
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void CMMFSwCodecUtility::ConstructL()
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{
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}
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void CMMFSwCodecUtility::ConfigAudioRamper(TInt64 aRampTime, TInt aSampleRate, TInt aChannels)
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{
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iRampSamples = I64LOW(((TInt64(aSampleRate) * aRampTime) /1000000 )); // Add this
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iRampSamplesLeft = iRampSamples;
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iChannels = aChannels;
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iRampIncr = 0;
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iSkip = ETrue;
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}
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TBool CMMFSwCodecUtility::RampAudio(CMMFDataBuffer* aBuffer)
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{
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TInt i=0;
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TInt length = aBuffer->Data().Length()>>1;
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TInt16* sample = REINTERPRET_CAST(TInt16*,&aBuffer->Data()[0]);
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TInt64 theResult(0);
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while ((i < length) && (iRampIncr < iRampSamples))
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{
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theResult = sample[i];
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theResult *= iRampIncr;
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theResult /= iRampSamples;
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sample[i] = STATIC_CAST(TInt16, I64LOW(theResult) );
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if ((iChannels == 1) || (!iSkip))
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{
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iRampIncr++;
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}
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iSkip = !iSkip;
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i++;
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}
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if (iRampIncr < iRampSamples)
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return ETrue;
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else
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return EFalse;
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}
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