--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devsound/devsoundrefplugin/src/plugin/audio/Mmfalawtopcm16hwdevice.cpp	Fri Oct 08 19:40:43 2010 +0100
@@ -0,0 +1,155 @@
+// 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:
+//
+
+#include "MMFAudioCodec.h"
+#include <mmf/common/mmfpaniccodes.h>
+#include "MmfALawToPcm16HwDevice.h"
+
+
+/**
+*
+* NewL
+*
+*/
+CMMFAlawToPcm16CodecHwDevice* CMMFAlawToPcm16CodecHwDevice::NewL()
+	{
+	CMMFAlawToPcm16CodecHwDevice* self=new(ELeave) CMMFAlawToPcm16CodecHwDevice();
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+/**
+*
+* ~CMMFAlawPcm16HwDevice
+*
+*/
+CMMFAlawToPcm16CodecHwDevice::~CMMFAlawToPcm16CodecHwDevice()
+	{
+	}
+
+/**
+*
+* ConstructL
+*
+*/
+void CMMFAlawToPcm16CodecHwDevice::ConstructL()
+	{
+	iCodec = new (ELeave) CMMFAlawToPcm16Codec();
+	}
+
+/**
+*
+* Codec
+*
+*/
+CMMFSwCodec &CMMFAlawToPcm16CodecHwDevice::Codec()
+	{
+	return *iCodec;
+	}
+
+/**
+*
+* ProcessL
+* @param aSrc
+* @param aDst
+* @pre position of buffer aSrc is 0
+* @pre position of buffer aDst is 0
+* @pre sufficient bytes in output to consume input
+* @return TCodecProcessResult
+*
+*/
+CMMFSwCodec::TCodecProcessResult CMMFAlawToPcm16Codec::ProcessL(const CMMFBuffer& aSrc, CMMFBuffer& aDst)
+	{
+	CMMFSwCodec::TCodecProcessResult result;
+	result.iCodecProcessStatus = TCodecProcessResult::EProcessComplete;
+	
+	//convert from generic CMMFBuffer to CMMFDataBuffer
+	const CMMFDataBuffer* src = STATIC_CAST(const CMMFDataBuffer*, &aSrc);
+	CMMFDataBuffer* dst = STATIC_CAST(CMMFDataBuffer*, &aDst);
+	
+	if( !CheckPreconditions( src, dst ))
+		{
+		//[ precondition violation ]
+		User::Leave( KErrArgument );
+		}
+		
+	//we need to cast away CONST even on the source, as the TClass needs a TUint8*
+	TUint8* pSrc = CONST_CAST(TUint8*,src->Data().Ptr());
+	TUint8* pDst = CONST_CAST(TUint8*,dst->Data().Ptr());
+	TInt noSamples = src->Data().Length();
+	iAlawTo16Pcm.Convert(pSrc, pDst, noSamples );
+	
+	TUint dstBytesAdded = noSamples*sizeof(TInt16);
+	
+	result.iCodecProcessStatus  = TCodecProcessResult::EProcessComplete;	
+	result.iSrcBytesProcessed   = src->Data().Length();
+	result.iDstBytesAdded       = dstBytesAdded;
+	
+	dst->Data().SetLength(dstBytesAdded);
+
+	//[ check post conditions ]
+	__ASSERT_DEBUG( (src->Position() == 0), TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation ));
+	__ASSERT_DEBUG( (dst->Position() == 0), TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation ));
+	__ASSERT_DEBUG( src->Data().Length() == dst->Data().Length()/2, TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation )); // 2 here signifies sizeof TInt16
+	__ASSERT_DEBUG( dst->Data().Length() % 2 == 0, TMmfAudioCodecPanicsNameSpace::Panic( 	TMmfAudioCodecPanicsNameSpace::EPostConditionViolation )); // pcm output
+
+	return result;
+	}
+
+/**
+*
+* Preconditions
+* This methos tests the preconditions of the ProcessL method
+* @return TBool ETrue for sucess and EFalse for failure of the preconditions
+*
+**/
+TBool CMMFAlawToPcm16Codec::CheckPreconditions( const CMMFDataBuffer* aSrcBuffer, CMMFDataBuffer* aDestBuffer )
+	{
+     TBool result = EFalse;
+	 
+	 if(! aSrcBuffer )
+		 {
+		 return result;
+		 }
+
+	 if( ! aDestBuffer )
+		 {
+		 return result;
+		 }
+
+	 // Check position of src and dest are 0
+	 if( aSrcBuffer->Position() )
+		 {
+		 return result;
+		 }
+
+	  // Check position of src and dest are 0
+	 if( aDestBuffer->Position() )
+		 {
+		 return result;
+		 }
+
+	 // check there are sufficient bytes in the output to consume the input
+     if( aSrcBuffer->Data().Length() * 2 > aDestBuffer->Data().MaxLength() )
+		 {
+		 return result;
+		 }
+
+	 result = ETrue;  // preconditions have been satisfied
+
+	 return result;
+	}