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 __MMFBTSWCODECDATAPATH_H__

    17 #define __MMFBTSWCODECDATAPATH_H__

    18 

    19 #include <e32base.h>

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

    21 

    22 class MMMFHwDeviceObserver;

    23 class CMMFSwCodec;

    24 

    25 /**

    26  *  Base class for the datapath internal to the Sw codec wrapper

    27  *  @internalComponent

    28  */

    29 class CMMFSwCodecDataPath : public CBase

    30 	{ 

    31 public: 

    32 	enum TSwCodecDataPathState

    33 	{

    34 	EStopped,

    35 	EPlaying,

    36 	EPaused

    37 	};

    38 public:	

    39 	virtual	~CMMFSwCodecDataPath(); 

    40 	virtual TInt SetObserver(MMMFHwDeviceObserver& aHwObserver) = 0;

    41 	virtual TInt AddCodec(CMMFSwCodec& aCodec) = 0;

    42 	virtual TInt Start() = 0;

    43 	virtual void Stop() = 0;

    44 	virtual void Pause() = 0;

    45 	virtual void BufferFilledL(CMMFDataBuffer& aBuffer) = 0;

    46 	virtual void BufferEmptiedL(const CMMFDataBuffer& aBuffer) = 0;

    47 	virtual void SoundDeviceException(TInt aError) = 0;

    48 	virtual TSwCodecDataPathState State() {return iState;};

    49 protected:	

    50 	CMMFSwCodecDataPath() {};

    51 	inline void Panic(TInt aPanicCode);

    52 	void ConstructL();

    53 

    54 #ifdef __CYCLE_MMF_DATABUFFERS__

    55 	CMMFDataBuffer* CycleAudioBuffer(CMMFDataBuffer* aBuffer);

    56 #endif

    57 

    58 #ifdef __USE_MMF_TRANSFERBUFFERS__

    59 	CMMFTransferBuffer* CreateTransferBufferL(TUint aBufferSize, CMMFTransferBuffer* aOldBuffer);

    60 #endif

    61 

    62 #ifdef __USE_MMF_PTRBUFFERS__

    63 	CMMFPtrBuffer* CreatePtrBufferL(TUint aBufferSize);

    64 #endif

    65 

    66 protected: 

    67 	TSwCodecDataPathState iState;

    68 	MMMFHwDeviceObserver* iHwDeviceObserver;

    69 	CMMFSwCodec* iCodec;

    70 #ifdef __USE_MMF_TRANSFERBUFFERS__

    71 	RTransferBuffer* iTransferBuffer;

    72 	RTransferWindow* iTransferWindow;

    73 #endif

    74 

    75 #ifdef __USE_MMF_PTRBUFFERS__

    76 	HBufC8* iPtrBufferMemoryBlock;

    77 #endif

    78 

    79 	};

    80 

    81 /**

    82  * Internal panic

    83  * @internalComponent

    84  */

    85 inline void CMMFSwCodecDataPath::Panic(TInt aPanicCode)

    86 	{

    87 	_LIT(KMMFSwCodecWrapperPanicCategory, "MMFSwCodecWrapper");

    88 	User::Panic(KMMFSwCodecWrapperPanicCategory, aPanicCode);

    89 	}

    90 

    91 #endif

    92