diff -r 000000000000 -r bde4ae8d615e os/mm/devsound/devsoundrefplugin/src/swcodecwrapper/mmfSwCodecDataPath.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/devsound/devsoundrefplugin/src/swcodecwrapper/mmfSwCodecDataPath.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,139 @@
+// 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
+