1 // Copyright (c) 2005-2009 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 __MMFBTSWCODECCONVERTDATAPATH_H__

    17 #define __MMFBTSWCODECCONVERTDATAPATH_H__

    18 

    19 #include <e32base.h>

    20 #include <mdasound.h>

    21 

    22 #include "mmfBtSwCodecDataPath.h"

    23 

    24 /**

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

    26  *  @internalComponent

    27  */

    28 class CMMFSwCodecConvertDataPath : public CMMFSwCodecDataPath

    29 	{ 

    30 public:	

    31 	static CMMFSwCodecConvertDataPath* NewL();

    32 	virtual ~CMMFSwCodecConvertDataPath(); 

    33 	virtual TInt SetObserver(MMMFHwDeviceObserver &aHwObserver);

    34 	virtual TInt AddCodec(CMMFSwCodec& aCodec);

    35 	virtual TInt Start();

    36 	virtual void Stop();

    37 	virtual void Pause();

    38 	virtual void BufferFilledL(CMMFDataBuffer& aBuffer);

    39 	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer);	

    40 	virtual void SoundDeviceException(TInt aError);

    41 	virtual RMdaDevSound& Device();

    42 	void FillSourceBufferL();

    43 	void FillSinkBufferL();

    44 	void EmptySinkBufferL();

    45 private:	

    46 	CMMFSwCodecConvertDataPath() {};

    47 	void ConstructL();	

    48 private: 

    49 	/**

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

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

    52 	 * between the source and the sink.

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

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

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

    56      * the case with descriptors.  Making CMMFSwCodecConvertDataPath derive

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

    58      * @internalComponent

    59      */

    60 	class CDataPathConverter : public CActive

    61 	{

    62 	public:

    63 		enum TConvertState

    64 		{

    65 		EIdle,

    66 		EFillingSourceBuffer,

    67 		EFillingSinkBuffer,

    68 		EEmptyingSinkBuffer

    69 		};

    70 	public:

    71 		CDataPathConverter(CMMFSwCodecConvertDataPath& aParent, TInt aPriority);

    72 		~CDataPathConverter();

    73 		void Start();

    74 		void BufferFilledL(CMMFDataBuffer& aBuffer);

    75 		void BufferEmptiedL(CMMFDataBuffer& aBuffer);

    76 		void ChangeConvertState(TConvertState aNewConvertState);

    77 		//CActive

    78 		virtual void RunL();

    79 		virtual TInt RunError(TInt aError);

    80 		virtual void DoCancel();

    81 	private:	

    82 		void FillSourceBufferL();

    83 		void FillSinkBufferL();

    84 		void EmptySinkBufferL();

    85 	private:

    86 		TConvertState iConvertState;

    87 		CMMFSwCodecConvertDataPath& iParent;

    88 		CMMFDataBuffer* iSourceBuffer;

    89 	};

    90 private: 

    91 	CDataPathConverter* iDataPathConverter;

    92 	CMMFDataBuffer* iSourceBuffer;

    93 	CMMFDataBuffer* iSinkBuffer;

    94 	TBool iNoMoreSourceData;

    95 	TUint iSinkBufferSize;

    96 	TUint iSourceBufferSize;

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

    98 	};

    99 

   100 #endif

   101