/*
* Copyright (c) 1997-2002 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 "MMFAudioPCM16SwapEndianCodec.h"
// __________________________________________________________________________
// Implementation
CMMFAudio16PcmSwapEndianCodec* CMMFAudio16PcmSwapEndianCodec::NewL(TAny* aInitParams)
{
CMMFAudio16PcmSwapEndianCodec* self=new(ELeave) CMMFAudio16PcmSwapEndianCodec();
CleanupStack::PushL(self);
self->ConstructL(aInitParams);
CleanupStack::Pop(self);
return self;
}
CMMFAudio16PcmSwapEndianCodec::~CMMFAudio16PcmSwapEndianCodec()
{
}
CMMFAudio16PcmSwapEndianCodec::CMMFAudio16PcmSwapEndianCodec()
{
}
void CMMFAudio16PcmSwapEndianCodec::ConstructL(TAny* /*aInitParams*/)
{
}
//this codec has a does not expand or shrink destination data
TCodecProcessResult CMMFAudio16PcmSwapEndianCodec::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();
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();
//divide by TWO as 2 bytes are equal to 1 sample
i16PcmTo16PcmSwap.Convert(pSrc, pDst, srcUse / 2);
if (srcUse + iDst->Position() < dstMaxLen)
result.iStatus = TCodecProcessResult::EDstNotFilled;
else if (srcUse + iSrc->Position() >= srcLen)
result.iStatus = TCodecProcessResult::EProcessComplete;
result.iSrcBytesProcessed = srcUse;
result.iDstBytesAdded = srcUse;
iDst->Data().SetLength(iDst->Position() + srcUse);
return result;
}