--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmlibs/mmfw/src/Plugin/Codec/audio/Mmfpcm16Tomulawcodec.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,93 @@
+// Copyright (c) 1997-2009 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 "MMFPcm16ToMuLawCodec.h"
+
+
+// __________________________________________________________________________
+// Implementation
+
+CMMFCodec* CMMFPcm16MulawCodec::NewL(TAny* aInitParams)
+	{
+	CMMFPcm16MulawCodec* self=new(ELeave) CMMFPcm16MulawCodec();
+	CleanupStack::PushL(self);
+	self->ConstructL(aInitParams);
+	CleanupStack::Pop(self);
+	return STATIC_CAST( CMMFCodec*, self );
+	}
+
+CMMFPcm16MulawCodec::~CMMFPcm16MulawCodec()
+	{
+	}
+
+CMMFPcm16MulawCodec::CMMFPcm16MulawCodec()
+	{
+	}
+
+void CMMFPcm16MulawCodec::ConstructL(TAny*  /*aInitParams*/)
+	{
+	}
+
+
+//this codec converts 2 bytes into 1
+TCodecProcessResult CMMFPcm16MulawCodec::ProcessL(const CMMFBuffer& aSrc, CMMFBuffer& aDst)
+	{
+
+	TCodecProcessResult result;
+	result.iStatus = TCodecProcessResult::EProcessIncomplete;
+
+	//convert from generic CMMFBuffer to CMMFDataBuffer
+	iSrc = STATIC_CAST(const CMMFDataBuffer*, &aSrc);
+	iDst = STATIC_CAST(CMMFDataBuffer*, &aDst);
+
+	const TUint dstMaxLen = iDst->Data().MaxLength();
+
+	if (!dstMaxLen)
+		User::Leave(KErrArgument);
+
+	//don't scribble Destination (pDst) by only consuming enough source to fill pDst
+	TUint srcUse = (dstMaxLen - iDst->Position()) * 2;
+	const TUint srcLen = iSrc->Data().Length();
+	const TUint sourceRemain = srcLen - iSrc->Position();
+
+	//make sure we don't blow source by checking against remaining
+	//and clipping to minimum remaining if necessary
+	srcUse = (srcUse<sourceRemain ? srcUse : sourceRemain);
+
+	//we need to cast away CONST even on the source, as the TClass needs a TUint8*
+	TUint8* pSrc = CONST_CAST(TUint8*,iSrc->Data().Ptr());
+	pSrc += iSrc->Position();
+	TUint8* pDst = CONST_CAST(TUint8*,iDst->Data().Ptr());
+	pDst += iDst->Position();
+
+	//compress TWO bytes (16-bit PCM word) into a to 1 byte sample
+	i16PcmToMulaw.Convert(pSrc, pDst, srcUse / 2);
+
+	TUint dstBytesAdded = srcUse / 2;
+
+	if (dstBytesAdded + iDst->Position() < dstMaxLen)
+		result.iStatus = TCodecProcessResult::EDstNotFilled;
+
+	else if (srcUse + iSrc->Position() >= srcLen)
+		result.iStatus = TCodecProcessResult::EProcessComplete;
+
+	result.iSrcBytesProcessed = srcUse;
+	result.iDstBytesAdded = dstBytesAdded;
+
+	iDst->Data().SetLength(iDst->Position() + result.iDstBytesAdded);
+
+	return result;
+
+	}