TB10.1 Example Applications: examples/Multimedia/MmfExSinkSource/mmfexdes.h Source File

00001 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
-00002 // All rights reserved.
-00003 // This component and the accompanying materials are made available
-00004 // under the terms of "Eclipse Public License v1.0"
-00005 // which accompanies this distribution, and is available
-00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
-00007 //
-00008 // Initial Contributors:
-00009 // Nokia Corporation - initial contribution.
-00010 //
-00011 // Contributors:
-00012 //
-00013 // Description:
-00014 // MMFDes.h
-00015 //
-00016 
-00017 #ifndef __MMFDES_H_
-00018 #define __MMFDES_H_
-00019 
-00020 
-00021 #include <mmf/server/mmfclip.h>
-00022 #include <mmf/common/mmfutilities.h>
-00023 
-00024 //Panic codes for MMFDescriptor
-00025 enum TMMFExDescriptorPanicCode
-00026         {
-00027         EMMFDescriptorPanicBufferEmptiedLNotSupported = 1,
-00028         EMMFDescriptorPanicBufferFilledLNotSupported
-00029         };
-00030         
-00031 class TMMFExDescriptorParams
-00032         {
-00033 public:
-00034         TAny* iDes ; // Address of TPtr8 describing source Descriptor
-00035         TThreadId iDesThreadId ;
-00036         } ;
-00037 
-00038 typedef TPckgBuf<TMMFExDescriptorParams>  TMMFDescriptorConfig ;
-00039 
-00040 // Defines a MMF sink and source plug-in that can write and read media data
-00041 // to a descriptor
-00042 // Implements CMMFClip, which itself derives from MDataSource and MDataSink
-00043 class CMMFExDescriptor : public CMMFClip
-00044         {
-00045 public:
-00046         // Data source factory
-00047         static MDataSource* NewSourceL() ; 
-00048         // Data sink factory
-00049         static MDataSink* NewSinkL() ; 
-00050         ~CMMFExDescriptor() ;
-00051         
-00052 private:
-00053         // From MDataSource
-00054         TFourCC SourceDataTypeCode( TMediaId /*aMediaId*/) ;
-00055         void FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer,TMediaId /*aMediaId*/) ;//called by a MDataSink to request buffer fill
-00056         void BufferEmptiedL( CMMFBuffer* aBuffer ) ;
-00057         TBool CanCreateSourceBuffer() ;
-00058         CMMFBuffer* CreateSourceBufferL(TMediaId /*aMediaId*/, TBool &aReference) ;
-00059         void ConstructSourceL(  const TDesC8& aInitData ) ;
-00060 
-00061         // From MDataSink
-00062         TFourCC SinkDataTypeCode(TMediaId /*aMediaId*/) ; //used by data path MDataSource/Sink for codec matching
-00063         void EmptyBufferL( CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId /*aMediaId*/ ) ; 
-00064         void BufferFilledL( CMMFBuffer* aBuffer ) ;
-00065         TBool CanCreateSinkBuffer() ;
-00066         CMMFBuffer* CreateSinkBufferL( TMediaId /*aMediaId*/ , TBool &aReference) ;
-00067         void ConstructSinkL( const TDesC8& aInitData ) ;
-00068 
-00069         // From CMMFClip
-00070         void ReadBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer);
-00071         void WriteBufferL( TInt aLength, CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier);
-00072         void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSink* aConsumer) ;
-00073         void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition, MDataSource* aSupplier) ;
-00074         void ReadBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;
-00075         void WriteBufferL( CMMFBuffer* aBuffer, TInt aPosition) ;
-00076         TInt64 BytesFree() ;  // amount of space available for the clip
-00077         TInt Size() ;  // length of clip
-00078 
-00079         // Construction
-00080         void ConstructL( const TDesC8& aInitData ) ;
-00081         CMMFExDescriptor();
-00082         // Helpers
-00083         void Reset() { iOffset = 0 ; };
-00084 
-00085 private:
-00086         // Need to know about the thread that the descriptor is in
-00087         RThread iDesThread;
-00088         TDes8* iDes ;
-00089         TInt iOffset;
-00090         TFourCC iSinkFourCC;
-00091         TFourCC iSourceFourCC;
-00092         TBool iUseTransferBuffer;
-00093         } ;
-00094 
-00095 
-00096 #endif
-