sl@0: // Copyright (c) 2003-2009 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: #ifndef __MMFSWCODECCONVERTDATAPATH_H__
sl@0: #define __MMFSWCODECCONVERTDATAPATH_H__
sl@0: 
sl@0: #include <e32base.h>
sl@0: 
sl@0: #include "mmfSwCodecDataPath.h"
sl@0: 
sl@0: /**
sl@0:  *  Derived class for convert datapath internal to the Sw codec wrapper
sl@0:  *  @internalComponent
sl@0:  */
sl@0: class CMMFSwCodecConvertDataPath : public CMMFSwCodecDataPathX
sl@0: 	{ 
sl@0: public:	
sl@0: 	static CMMFSwCodecConvertDataPath* NewL();
sl@0: 	virtual ~CMMFSwCodecConvertDataPath(); 
sl@0: 	virtual TInt SetObserver(MMMFHwDeviceObserver &aHwObserver);
sl@0: 	virtual TInt AddCodec(CMMFSwCodec& aCodec);
sl@0: 	virtual TInt Start();
sl@0: 	virtual void Stop();
sl@0: 	virtual void Pause();
sl@0: 	virtual void BufferFilledL(CMMFDataBuffer& aBuffer);
sl@0: 	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer);	
sl@0: 	virtual void SoundDeviceException(TInt aError);
sl@0: 	virtual RMdaDevSound& Device();
sl@0: 	void FillSourceBufferL();
sl@0: 	void FillSinkBufferL();
sl@0: 	void EmptySinkBufferL();
sl@0: private:	
sl@0: 	CMMFSwCodecConvertDataPath() {};
sl@0: 	void ConstructL();	
sl@0: private: 
sl@0: 	/**
sl@0:      * Private class for the convert datapath that is an active object
sl@0: 	 * used to drive the conversion.  This class performs the main data transfer
sl@0: 	 * between the source and the sink.
sl@0:      * This is done in a separate class as opposed to CMMFSwCodecConvertDataPath
sl@0:      * because the class needs to be an active object to avoid recursive call stacks
sl@0:      * in cases where the source and sink are not active objects - which is
sl@0:      * the case with descriptors.  Making CMMFSwCodecConvertDataPath derive
sl@0:      * from CActive is less desirable as it would involve multiple inheretence
sl@0:      * @internalComponent
sl@0:      */
sl@0: 	class CDataPathConverter : public CActive
sl@0: 	{
sl@0: 	public:
sl@0: 		enum TConvertState
sl@0: 		{
sl@0: 		EIdle,
sl@0: 		EFillingSourceBuffer,
sl@0: 		EFillingSinkBuffer,
sl@0: 		EEmptyingSinkBuffer
sl@0: 		};
sl@0: 	public:
sl@0: 		CDataPathConverter(CMMFSwCodecConvertDataPath& aParent, TInt aPriority);
sl@0: 		~CDataPathConverter();
sl@0: 		void Start();
sl@0: 		void BufferFilledL(CMMFDataBuffer& aBuffer);
sl@0: 		void BufferEmptiedL(CMMFDataBuffer& aBuffer);
sl@0: 		void ChangeConvertState(TConvertState aNewConvertState);
sl@0: 		//CActive
sl@0: 		virtual void RunL();
sl@0: 		virtual TInt RunError(TInt aError);
sl@0: 		virtual void DoCancel();
sl@0: 	private:	
sl@0: 		void FillSourceBufferL();
sl@0: 		void FillSinkBufferL();
sl@0: 		void EmptySinkBufferL();
sl@0: 	private:
sl@0: 		TConvertState iConvertState;
sl@0: 		CMMFSwCodecConvertDataPath& iParent;
sl@0: 		CMMFDataBuffer* iSourceBuffer;
sl@0: 	};
sl@0: private: 
sl@0: 	CDataPathConverter* iDataPathConverter;
sl@0: 	CMMFDataBuffer* iSourceBuffer;
sl@0: 	CMMFDataBuffer* iSinkBuffer;
sl@0: 	TBool iNoMoreSourceData;
sl@0: 	TUint iSinkBufferSize;
sl@0: 	TUint iSourceBufferSize;
sl@0: 	RMdaDevSound iDummyDevSound;//don't need a devsound for convert
sl@0: 	};
sl@0: 
sl@0: #endif
sl@0: