1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef __MMFDES_H_

    17 #define __MMFDES_H_

    18 

    19 

    20 #include <mmf/server/mmfclip.h>

    21 #include <mmf/common/mmfutilities.h>

    22 

    23 

    24 /**

    25 @publishedAll

    26 @released

    27 

    28 Descriptor parameters.

    29 

    30 Used by CMMFDescriptor::ConstructL().

    31 */

    32 class TMMFDescriptorParams

    33 	{

    34 public:

    35 	/**

    36     Address of TPr8 describing source descriptor.

    37 	*/

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

    39 	/**

    40 	Descriptor thread.

    41 	*/

    42 	TThreadId iDesThreadId ;

    43 private:

    44 	/**

    45 	This member is internal and not intended for use.

    46 	*/

    47 	TInt iReserved1;

    48 	} ;

    49 

    50 /**

    51 @publishedAll

    52 @released

    53 */

    54 typedef TPckgBuf<TMMFDescriptorParams>  TMMFDescriptorConfig ;

    55 

    56 /**

    57 @publishedAll

    58 @released

    59 

    60 MultiMedia framework class.  Represents a client side descriptor.

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

    62 */

    63 class CMMFDescriptor : public CMMFClip

    64 	{

    65 public :

    66 

    67 	// From MDataSource

    68 	virtual TFourCC SourceDataTypeCode( TMediaId aMediaId) ;

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

    70 	virtual void BufferEmptiedL( CMMFBuffer* aBuffer ) ;

    71 	virtual TBool CanCreateSourceBuffer() ;

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

    73 	

    74 	// From MDataSink

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

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

    77 	virtual void BufferFilledL( CMMFBuffer* aBuffer ) ;

    78 	virtual TBool CanCreateSinkBuffer() ;

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

    80 

    81 	// From CMMFClip

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

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

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

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

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

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

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

    89 	virtual TInt Size() ;  // length of clip

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

    91 

    92 	// CMMFDescriptor

    93 	virtual ~CMMFDescriptor() ;

    94 	static MDataSource* NewSourceL() ; 

    95 	static MDataSink* NewSinkL() ; 

    96 

    97 	void SetTransferBuffer (TBool aTBuffer) ;

    98 	TBool CanUseTransferBuffer () ;

    99 

   100 protected :

   101 	virtual void ConstructSinkL( const TDesC8& aInitData ) ;

   102 	virtual void ConstructSourceL(  const TDesC8& aInitData ) ;

   103 	void ConstructL( const TDesC8& aInitData ) ;

   104 	CMMFDescriptor( ) ;

   105 

   106 private :

   107 	// returns the Maximum length of the descriptor

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

   109 

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

   111 	RThread iDesThread ;

   112 

   113 	TDes8* iDes ;

   114 	TInt iOffset ;

   115 

   116 	TFourCC  iSinkFourCC ;

   117 	TFourCC  iSourceFourCC ;

   118 

   119 	TBool iUseTransferBuffer ;

   120 

   121 	

   122 	} ;

   123 

   124 

   125 #endif