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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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#ifndef __MMFSWCODECCONVERTDATAPATH_H__
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#define __MMFSWCODECCONVERTDATAPATH_H__
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#include <e32base.h>
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#include "mmfSwCodecDataPath.h"
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/**
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* Derived class for convert datapath internal to the Sw codec wrapper
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* @internalComponent
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*/
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class CMMFSwCodecConvertDataPath : public CMMFSwCodecDataPathX
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{
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public:
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static CMMFSwCodecConvertDataPath* NewL();
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virtual ~CMMFSwCodecConvertDataPath();
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virtual TInt SetObserver(MMMFHwDeviceObserver &aHwObserver);
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virtual TInt AddCodec(CMMFSwCodec& aCodec);
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virtual TInt Start();
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virtual void Stop();
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virtual void Pause();
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virtual void BufferFilledL(CMMFDataBuffer& aBuffer);
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virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer);
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virtual void SoundDeviceException(TInt aError);
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virtual RMdaDevSound& Device();
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void FillSourceBufferL();
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void FillSinkBufferL();
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void EmptySinkBufferL();
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private:
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CMMFSwCodecConvertDataPath() {};
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void ConstructL();
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private:
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/**
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* Private class for the convert datapath that is an active object
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* used to drive the conversion. This class performs the main data transfer
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* between the source and the sink.
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* This is done in a separate class as opposed to CMMFSwCodecConvertDataPath
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* because the class needs to be an active object to avoid recursive call stacks
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* in cases where the source and sink are not active objects - which is
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* the case with descriptors. Making CMMFSwCodecConvertDataPath derive
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* from CActive is less desirable as it would involve multiple inheretence
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* @internalComponent
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*/
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class CDataPathConverter : public CActive
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{
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public:
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enum TConvertState
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{
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EIdle,
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EFillingSourceBuffer,
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EFillingSinkBuffer,
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EEmptyingSinkBuffer
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};
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public:
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CDataPathConverter(CMMFSwCodecConvertDataPath& aParent, TInt aPriority);
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~CDataPathConverter();
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void Start();
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void BufferFilledL(CMMFDataBuffer& aBuffer);
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void BufferEmptiedL(CMMFDataBuffer& aBuffer);
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void ChangeConvertState(TConvertState aNewConvertState);
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//CActive
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virtual void RunL();
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virtual TInt RunError(TInt aError);
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virtual void DoCancel();
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private:
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void FillSourceBufferL();
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void FillSinkBufferL();
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void EmptySinkBufferL();
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private:
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TConvertState iConvertState;
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CMMFSwCodecConvertDataPath& iParent;
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CMMFDataBuffer* iSourceBuffer;
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};
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private:
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CDataPathConverter* iDataPathConverter;
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CMMFDataBuffer* iSourceBuffer;
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CMMFDataBuffer* iSinkBuffer;
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TBool iNoMoreSourceData;
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TUint iSinkBufferSize;
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TUint iSourceBufferSize;
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RMdaDevSound iDummyDevSound;//don't need a devsound for convert
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};
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#endif
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