1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/mm/mmlibs/mmfw/src/Plugin/Codec/audio/Mmfpcm16Tomulawcodec.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,93 @@
     1.4 +// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#include "MMFPcm16ToMuLawCodec.h"
    1.20 +
    1.21 +
    1.22 +// __________________________________________________________________________
    1.23 +// Implementation
    1.24 +
    1.25 +CMMFCodec* CMMFPcm16MulawCodec::NewL(TAny* aInitParams)
    1.26 +	{
    1.27 +	CMMFPcm16MulawCodec* self=new(ELeave) CMMFPcm16MulawCodec();
    1.28 +	CleanupStack::PushL(self);
    1.29 +	self->ConstructL(aInitParams);
    1.30 +	CleanupStack::Pop(self);
    1.31 +	return STATIC_CAST( CMMFCodec*, self );
    1.32 +	}
    1.33 +
    1.34 +CMMFPcm16MulawCodec::~CMMFPcm16MulawCodec()
    1.35 +	{
    1.36 +	}
    1.37 +
    1.38 +CMMFPcm16MulawCodec::CMMFPcm16MulawCodec()
    1.39 +	{
    1.40 +	}
    1.41 +
    1.42 +void CMMFPcm16MulawCodec::ConstructL(TAny*  /*aInitParams*/)
    1.43 +	{
    1.44 +	}
    1.45 +
    1.46 +
    1.47 +//this codec converts 2 bytes into 1
    1.48 +TCodecProcessResult CMMFPcm16MulawCodec::ProcessL(const CMMFBuffer& aSrc, CMMFBuffer& aDst)
    1.49 +	{
    1.50 +
    1.51 +	TCodecProcessResult result;
    1.52 +	result.iStatus = TCodecProcessResult::EProcessIncomplete;
    1.53 +
    1.54 +	//convert from generic CMMFBuffer to CMMFDataBuffer
    1.55 +	iSrc = STATIC_CAST(const CMMFDataBuffer*, &aSrc);
    1.56 +	iDst = STATIC_CAST(CMMFDataBuffer*, &aDst);
    1.57 +
    1.58 +	const TUint dstMaxLen = iDst->Data().MaxLength();
    1.59 +
    1.60 +	if (!dstMaxLen)
    1.61 +		User::Leave(KErrArgument);
    1.62 +
    1.63 +	//don't scribble Destination (pDst) by only consuming enough source to fill pDst
    1.64 +	TUint srcUse = (dstMaxLen - iDst->Position()) * 2;
    1.65 +	const TUint srcLen = iSrc->Data().Length();
    1.66 +	const TUint sourceRemain = srcLen - iSrc->Position();
    1.67 +
    1.68 +	//make sure we don't blow source by checking against remaining
    1.69 +	//and clipping to minimum remaining if necessary
    1.70 +	srcUse = (srcUse<sourceRemain ? srcUse : sourceRemain);
    1.71 +
    1.72 +	//we need to cast away CONST even on the source, as the TClass needs a TUint8*
    1.73 +	TUint8* pSrc = CONST_CAST(TUint8*,iSrc->Data().Ptr());
    1.74 +	pSrc += iSrc->Position();
    1.75 +	TUint8* pDst = CONST_CAST(TUint8*,iDst->Data().Ptr());
    1.76 +	pDst += iDst->Position();
    1.77 +
    1.78 +	//compress TWO bytes (16-bit PCM word) into a to 1 byte sample
    1.79 +	i16PcmToMulaw.Convert(pSrc, pDst, srcUse / 2);
    1.80 +
    1.81 +	TUint dstBytesAdded = srcUse / 2;
    1.82 +
    1.83 +	if (dstBytesAdded + iDst->Position() < dstMaxLen)
    1.84 +		result.iStatus = TCodecProcessResult::EDstNotFilled;
    1.85 +
    1.86 +	else if (srcUse + iSrc->Position() >= srcLen)
    1.87 +		result.iStatus = TCodecProcessResult::EProcessComplete;
    1.88 +
    1.89 +	result.iSrcBytesProcessed = srcUse;
    1.90 +	result.iDstBytesAdded = dstBytesAdded;
    1.91 +
    1.92 +	iDst->Data().SetLength(iDst->Position() + result.iDstBytesAdded);
    1.93 +
    1.94 +	return result;
    1.95 +
    1.96 +	}