2 * Copyright (c) 1997-2002 Nokia Corporation and/or its subsidiary(-ies).
4 * This component and the accompanying materials are made available
5 * under the terms of "Eclipse Public License v1.0"
6 * which accompanies this distribution, and is available
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
9 * Initial Contributors:
10 * Nokia Corporation - initial contribution.
20 #include "MMFAudioPCM16SwapEndianCodec.h"
22 // __________________________________________________________________________
25 CMMFAudio16PcmSwapEndianCodec* CMMFAudio16PcmSwapEndianCodec::NewL(TAny* aInitParams)
27 CMMFAudio16PcmSwapEndianCodec* self=new(ELeave) CMMFAudio16PcmSwapEndianCodec();
28 CleanupStack::PushL(self);
29 self->ConstructL(aInitParams);
30 CleanupStack::Pop(self);
34 CMMFAudio16PcmSwapEndianCodec::~CMMFAudio16PcmSwapEndianCodec()
38 CMMFAudio16PcmSwapEndianCodec::CMMFAudio16PcmSwapEndianCodec()
42 void CMMFAudio16PcmSwapEndianCodec::ConstructL(TAny* /*aInitParams*/)
47 //this codec has a does not expand or shrink destination data
48 TCodecProcessResult CMMFAudio16PcmSwapEndianCodec::ProcessL(const CMMFBuffer& aSrc, CMMFBuffer& aDst)
51 TCodecProcessResult result;
52 result.iStatus = TCodecProcessResult::EProcessIncomplete;
54 //convert from generic CMMFBuffer to CMMFDataBuffer
55 iSrc = STATIC_CAST(const CMMFDataBuffer*, &aSrc);
56 iDst = STATIC_CAST(CMMFDataBuffer*, &aDst);
58 const TUint dstMaxLen = iDst->Data().MaxLength();
61 User::Leave(KErrArgument);
63 //don't scribble Destination (pDst) by only consuming enough source to fill pDst
64 TUint srcUse = dstMaxLen - iDst->Position();
65 const TUint srcLen = iSrc->Data().Length();
66 const TUint sourceRemain = srcLen - iSrc->Position();
69 //make sure we don't blow source by checking against remaining
70 //and clipping to minimum remaining if necessary
71 srcUse = (srcUse<sourceRemain ? srcUse : sourceRemain);
74 //we need to cast away CONST even on the source, as the TClass needs a TUint8*
75 TUint8* pSrc = CONST_CAST(TUint8*,iSrc->Data().Ptr());
76 pSrc += iSrc->Position();
77 TUint8* pDst = CONST_CAST(TUint8*,iDst->Data().Ptr());
78 pDst += iDst->Position();
80 //divide by TWO as 2 bytes are equal to 1 sample
81 i16PcmTo16PcmSwap.Convert(pSrc, pDst, srcUse / 2);
83 if (srcUse + iDst->Position() < dstMaxLen)
84 result.iStatus = TCodecProcessResult::EDstNotFilled;
86 else if (srcUse + iSrc->Position() >= srcLen)
87 result.iStatus = TCodecProcessResult::EProcessComplete;
89 result.iSrcBytesProcessed = srcUse;
90 result.iDstBytesAdded = srcUse;
92 iDst->Data().SetLength(iDst->Position() + srcUse);