// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

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

// which accompanies this distribution, and is available

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

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef __MMFSWCODECDATAPATH_H__

#define __MMFSWCODECDATAPATH_H__

#include <e32base.h>

#include <mmf/server/mmfdatabuffer.h>

#ifdef SYMBIAN_MDF_SHAREDCHUNK_SOUNDDRIVER

	#include "mdasoundadapter.h"

#else

	#include <mdasound.h>

	_LIT(KPddFileName,"ESDRV.PDD");

	_LIT(KLddFileName,"ESOUND.LDD");

#endif

class MMMFHwDeviceObserver;

class CMMFSwCodec;

/*

Interface for setting desired sample rate, channels and for setting Gain/Volume

*/

const TUid KUidSwSetParamInterface = {0x1028707E}; 

class MSwSetParamInterface

	{

public:

	virtual TInt SetSampleRate(TInt aSampleRate)=0;

	virtual TInt SetNumChannels(TInt aNumChannels)=0;

	virtual TInt SetGain(TInt aGain)=0;

	virtual TInt GetBufferSizes(TInt& aMinSize, TInt& aMaxSize)=0;

	};

/*

 * Interface for discovering various parameters

 */

const TUid KUidSwInfoInterface = {0x1028707F}; 

class MSwInfoInterface

    {

public:

    virtual TInt GetSupportedSampleRates(RArray<TInt>& aSupportedSampleRates)=0; 

    };

/**

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

 *  @internalComponent

 */

class CMMFSwCodecDataPath : public CBase

	{ 

public: 

	enum TSwCodecDataPathState

	{

	EStopped,

	EPlaying,

	EPaused

	};

public:	

	virtual	~CMMFSwCodecDataPath(); 

	virtual TInt SetObserver(MMMFHwDeviceObserver& aHwObserver) = 0;

	virtual TInt AddCodec(CMMFSwCodec& aCodec) = 0;

	virtual TInt Start() = 0;

	virtual void Stop() = 0;

	virtual void Pause() = 0;

	virtual RMdaDevSound& Device() = 0;

	virtual void BufferFilledL(CMMFDataBuffer& aBuffer) = 0;

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

	virtual void SoundDeviceException(TInt aError) = 0;

	virtual TSwCodecDataPathState State() const = 0;

	virtual TAny* CustomInterface(TUid aInterfaceId);

protected:	

	CMMFSwCodecDataPath() {};

	inline void Panic(TInt aPanicCode);

	void ConstructL();

#ifdef __CYCLE_MMF_DATABUFFERS__

	CMMFDataBuffer* CycleAudioBuffer(CMMFDataBuffer* aBuffer);

#endif

#ifdef __USE_MMF_TRANSFERBUFFERS__

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

#endif

#ifdef __USE_MMF_PTRBUFFERS__

	CMMFPtrBuffer* CreatePtrBufferL(TUint aBufferSize);

#endif

protected: 

	MMMFHwDeviceObserver* iHwDeviceObserver;

	CMMFSwCodec* iCodec;

#ifdef __USE_MMF_TRANSFERBUFFERS__

	RTransferBuffer* iTransferBuffer;

	RTransferWindow* iTransferWindow;

#endif

#ifdef __USE_MMF_PTRBUFFERS__

	HBufC8* iPtrBufferMemoryBlock;

#endif

	};

/**

 * Internal panic

 * @internalComponent

 */

inline void CMMFSwCodecDataPath::Panic(TInt aPanicCode)

	{

	_LIT(KMMFSwCodecWrapperPanicCategory, "MMFSwCodecWrapper");

	User::Panic(KMMFSwCodecWrapperPanicCategory, aPanicCode);

	}

/**

 * Extended datapath class with state info  

 * @internalComponent 

 */

class CMMFSwCodecDataPathX : public CMMFSwCodecDataPath

    {

protected: 

    CMMFSwCodecDataPathX(): CMMFSwCodecDataPath() {}

    // from CMMFSwCodecDataPath

    TSwCodecDataPathState State() const {return iState;}

    TSwCodecDataPathState iState;

    };

#endif