1 // Copyright (c) 2003-2009 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 __MMFSWCODECCONVERTDATAPATH_H__

    17 #define __MMFSWCODECCONVERTDATAPATH_H__

    18 

    19 #include <e32base.h>

    20 

    21 #include "mmfSwCodecDataPath.h"

    22 

    23 /**

    24  *  Derived class for convert datapath internal to the Sw codec wrapper

    25  *  @internalComponent

    26  */

    27 class CMMFSwCodecConvertDataPath : public CMMFSwCodecDataPathX

    28 	{ 

    29 public:	

    30 	static CMMFSwCodecConvertDataPath* NewL();

    31 	virtual ~CMMFSwCodecConvertDataPath(); 

    32 	virtual TInt SetObserver(MMMFHwDeviceObserver &aHwObserver);

    33 	virtual TInt AddCodec(CMMFSwCodec& aCodec);

    34 	virtual TInt Start();

    35 	virtual void Stop();

    36 	virtual void Pause();

    37 	virtual void BufferFilledL(CMMFDataBuffer& aBuffer);

    38 	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer);	

    39 	virtual void SoundDeviceException(TInt aError);

    40 	virtual RMdaDevSound& Device();

    41 	void FillSourceBufferL();

    42 	void FillSinkBufferL();

    43 	void EmptySinkBufferL();

    44 private:	

    45 	CMMFSwCodecConvertDataPath() {};

    46 	void ConstructL();	

    47 private: 

    48 	/**

    49      * Private class for the convert datapath that is an active object

    50 	 * used to drive the conversion.  This class performs the main data transfer

    51 	 * between the source and the sink.

    52      * This is done in a separate class as opposed to CMMFSwCodecConvertDataPath

    53      * because the class needs to be an active object to avoid recursive call stacks

    54      * in cases where the source and sink are not active objects - which is

    55      * the case with descriptors.  Making CMMFSwCodecConvertDataPath derive

    56      * from CActive is less desirable as it would involve multiple inheretence

    57      * @internalComponent

    58      */

    59 	class CDataPathConverter : public CActive

    60 	{

    61 	public:

    62 		enum TConvertState

    63 		{

    64 		EIdle,

    65 		EFillingSourceBuffer,

    66 		EFillingSinkBuffer,

    67 		EEmptyingSinkBuffer

    68 		};

    69 	public:

    70 		CDataPathConverter(CMMFSwCodecConvertDataPath& aParent, TInt aPriority);

    71 		~CDataPathConverter();

    72 		void Start();

    73 		void BufferFilledL(CMMFDataBuffer& aBuffer);

    74 		void BufferEmptiedL(CMMFDataBuffer& aBuffer);

    75 		void ChangeConvertState(TConvertState aNewConvertState);

    76 		//CActive

    77 		virtual void RunL();

    78 		virtual TInt RunError(TInt aError);

    79 		virtual void DoCancel();

    80 	private:	

    81 		void FillSourceBufferL();

    82 		void FillSinkBufferL();

    83 		void EmptySinkBufferL();

    84 	private:

    85 		TConvertState iConvertState;

    86 		CMMFSwCodecConvertDataPath& iParent;

    87 		CMMFDataBuffer* iSourceBuffer;

    88 	};

    89 private: 

    90 	CDataPathConverter* iDataPathConverter;

    91 	CMMFDataBuffer* iSourceBuffer;

    92 	CMMFDataBuffer* iSinkBuffer;

    93 	TBool iNoMoreSourceData;

    94 	TUint iSinkBufferSize;

    95 	TUint iSourceBufferSize;

    96 	RMdaDevSound iDummyDevSound;//don't need a devsound for convert

    97 	};

    98 

    99 #endif

   100