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// Copyright (c) 2001-2009 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 __MMFDES_H_
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#define __MMFDES_H_
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#include <mmf/server/mmfclip.h>
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#include <mmf/common/mmfutilities.h>
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/**
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@publishedAll
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@released
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Descriptor parameters.
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Used by CMMFDescriptor::ConstructL().
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*/
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class TMMFDescriptorParams
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{
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public:
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/**
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Address of TPr8 describing source descriptor.
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*/
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TAny* iDes ; // Address of TPr8 describing source Descriptor
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/**
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Descriptor thread.
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*/
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TThreadId iDesThreadId ;
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private:
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/**
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This member is internal and not intended for use.
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*/
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TInt iReserved1;
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} ;
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/**
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@publishedAll
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@released
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*/
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typedef TPckgBuf<TMMFDescriptorParams> TMMFDescriptorConfig ;
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/**
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@publishedAll
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@released
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MultiMedia framework class. Represents a client side descriptor.
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May be source descriptor from which data is read or destination to which data is written
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*/
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class CMMFDescriptor : public CMMFClip
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{
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public :
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// From MDataSource
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virtual TFourCC SourceDataTypeCode( TMediaId aMediaId) ;
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virtual void FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer,TMediaId aMediaId) ;//called by a MDataSink to request buffer fill
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virtual void BufferEmptiedL( CMMFBuffer* aBuffer ) ;
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virtual TBool CanCreateSourceBuffer() ;
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virtual CMMFBuffer* CreateSourceBufferL(TMediaId aMediaId, TBool &aReference) ;
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// From MDataSink
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virtual TFourCC SinkDataTypeCode(TMediaId aMediaId) ; //used by data path MDataSource/Sink for codec matching
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virtual void EmptyBufferL( CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId ) ;
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virtual void BufferFilledL( CMMFBuffer* aBuffer ) ;
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virtual TBool CanCreateSinkBuffer() ;
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virtual CMMFBuffer* CreateSinkBufferL( TMediaId aMediaId , TBool &aReference) ;
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// From CMMFClip
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virtual void ReadBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer);
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virtual void WriteBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier);
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virtual void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer) ;
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virtual void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier) ;
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virtual void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;
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virtual void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;
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virtual TInt64 BytesFree() ; // amount of space available for the clip
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virtual TInt Size() ; // length of clip
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virtual TInt SetSize( TInt aSize ); // sets the size of the clip (used mainly by crop)
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// CMMFDescriptor
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virtual ~CMMFDescriptor() ;
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static MDataSource* NewSourceL() ;
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static MDataSink* NewSinkL() ;
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void SetTransferBuffer (TBool aTBuffer) ;
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TBool CanUseTransferBuffer () ;
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protected :
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virtual void ConstructSinkL( const TDesC8& aInitData ) ;
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virtual void ConstructSourceL( const TDesC8& aInitData ) ;
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void ConstructL( const TDesC8& aInitData ) ;
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CMMFDescriptor( ) ;
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private :
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// returns the Maximum length of the descriptor
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inline TInt MaxLength() { ASSERT( iDes ); return iDes->MaxLength(); }
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// Need to know about the thread that the descriptor is in.
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RThread iDesThread ;
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TDes8* iDes ;
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TInt iOffset ;
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TFourCC iSinkFourCC ;
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TFourCC iSourceFourCC ;
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TBool iUseTransferBuffer ;
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} ;
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#endif
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