// Copyright (c) 2001-2009 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:

//

#ifndef __MMFDES_H_

#define __MMFDES_H_

#include <mmf/server/mmfclip.h>

#include <mmf/common/mmfutilities.h>

/**

@publishedAll

@released

Descriptor parameters.

Used by CMMFDescriptor::ConstructL().

*/

class TMMFDescriptorParams

	{

public:

	/**

    Address of TPr8 describing source descriptor.

	*/

	TAny* iDes ; // Address of TPr8 describing source Descriptor

	/**

	Descriptor thread.

	*/

	TThreadId iDesThreadId ;

private:

	/**

	This member is internal and not intended for use.

	*/

	TInt iReserved1;

	} ;

/**

@publishedAll

@released

*/

typedef TPckgBuf<TMMFDescriptorParams>  TMMFDescriptorConfig ;

/**

@publishedAll

@released

MultiMedia framework class.  Represents a client side descriptor.

May be source descriptor from which data is read or destination to which data is written

*/

class CMMFDescriptor : public CMMFClip

	{

public :

	// From MDataSource

	virtual TFourCC SourceDataTypeCode( TMediaId aMediaId) ;

	virtual void FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer,TMediaId aMediaId) ;//called by a MDataSink to request buffer fill

	virtual void BufferEmptiedL( CMMFBuffer* aBuffer ) ;

	virtual TBool CanCreateSourceBuffer() ;

	virtual CMMFBuffer* CreateSourceBufferL(TMediaId aMediaId, TBool &aReference) ;

	// From MDataSink

	virtual TFourCC SinkDataTypeCode(TMediaId aMediaId) ; //used by data path MDataSource/Sink for codec matching

	virtual void EmptyBufferL( CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId ) ;

	virtual void BufferFilledL( CMMFBuffer* aBuffer ) ;

	virtual TBool CanCreateSinkBuffer() ;

	virtual CMMFBuffer* CreateSinkBufferL( TMediaId aMediaId , TBool &aReference) ;

	// From CMMFClip

	virtual void ReadBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer);

	virtual void WriteBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier);

	virtual void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer) ;

	virtual void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier) ;

	virtual void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;

	virtual void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;

	virtual TInt64 BytesFree() ;  // amount of space available for the clip

	virtual TInt Size() ;  // length of clip

	virtual TInt SetSize( TInt aSize ); // sets the size of the clip (used mainly by crop)

	// CMMFDescriptor

	virtual ~CMMFDescriptor() ;

	static MDataSource* NewSourceL() ; 

	static MDataSink* NewSinkL() ; 

	void SetTransferBuffer (TBool aTBuffer) ;

	TBool CanUseTransferBuffer () ;

protected :

	virtual void ConstructSinkL( const TDesC8& aInitData ) ;

	virtual void ConstructSourceL(  const TDesC8& aInitData ) ;

	void ConstructL( const TDesC8& aInitData ) ;

	CMMFDescriptor( ) ;

private :

	// returns the Maximum length of the descriptor

	inline TInt MaxLength() { ASSERT( iDes ); return iDes->MaxLength(); }

	// Need to know about the thread that the descriptor is in.

	RThread iDesThread ;

	TDes8* iDes ;

	TInt iOffset ;

	TFourCC  iSinkFourCC ;

	TFourCC  iSourceFourCC ;

	TBool iUseTransferBuffer ;

	} ;

#endif