sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // source\server\mmfswcodecdatapath.cpp
sl@0: // 
sl@0: //
sl@0: 
sl@0: #include "mmfSwCodecDataPath.h"
sl@0: 
sl@0: 
sl@0: CMMFSwCodecDataPath::~CMMFSwCodecDataPath()
sl@0: 	{
sl@0: 
sl@0: 	}
sl@0: 	
sl@0: /**
sl@0: Retrieves a custom interface to the device.
sl@0: Usually the derived class should
sl@0: return the implementation for this.
sl@0: 
sl@0: @param	aInterface
sl@0: 		Interface UID, defined with the custom interface.
sl@0: 		
sl@0: @return NULL 
sl@0: 
sl@0: */
sl@0: TAny* CMMFSwCodecDataPath::CustomInterface(TUid /*aInterface*/)
sl@0: 	{
sl@0: 	return NULL;
sl@0: 	}
sl@0: 	
sl@0: 	
sl@0: 
sl@0: /*
sl@0:  * CycleAudioBufferL
sl@0:  *
sl@0:  * Sets up a usable buffer for passing to MMF
sl@0:  *	
sl@0:  * This method has been written such that it must allocate a new buffer before
sl@0:  * replacing the existing one. The purpose of this is to force creation of a 
sl@0:  * new buffer. Simply deleting and then re-allocing may result in the same 
sl@0:  * address being used.
sl@0:  * 
sl@0:  * Only cycles if there is enough memory
sl@0:  *
sl@0:  */
sl@0: #ifdef __CYCLE_MMF_DATABUFFERS__
sl@0: CMMFDataBuffer* CMMFSwCodecDataPath::CycleAudioBuffer(CMMFDataBuffer* aBuffer)
sl@0: 	{
sl@0: 	CMMFDataBuffer* buffer = NULL;
sl@0: 	TUint bufferSize = aBuffer->Data().MaxLength();
sl@0: 
sl@0: #ifdef __USE_MMF_TRANSFERBUFFERS__
sl@0: 	TRAPD(err, buffer = CreateTransferBufferL(bufferSize, static_cast<CMMFTransferBuffer*>(aBuffer)));
sl@0: #else
sl@0: 	TRAPD(err,buffer = CMMFDataBuffer::NewL(bufferSize));
sl@0: 
sl@0: 	if (err == KErrNone)
sl@0: 		{
sl@0: 		delete aBuffer;
sl@0: 		}
sl@0: #endif
sl@0: 	if (err != KErrNone)
sl@0: 		{//there was a problem creating buffer eg OOM so use same buffer
sl@0: 		buffer = aBuffer;
sl@0: 		}
sl@0: 
sl@0: 	return buffer;
sl@0: 
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: /*
sl@0:  * DoCleanupRHandleBase
sl@0:  *
sl@0:  * This method will initially Close the handle and then delete it.
sl@0:  *
sl@0:  */
sl@0: #ifdef __USE_MMF_TRANSFERBUFFERS__
sl@0: inline static void DoCleanupRHandleBase(TAny* aRHandleBase)
sl@0: 	{
sl@0: 	ASSERT(aRHandleBase);
sl@0: 	RHandleBase* rHandleBase = STATIC_CAST(RHandleBase*, aRHandleBase);
sl@0: 	TRAPD(error, rHandleBase->Close());
sl@0: 	delete aRHandleBase;
sl@0: 	}
sl@0: 
sl@0: CMMFTransferBuffer* CMMFSwCodecDataPath::CreateTransferBufferL(TUint aBufferSize, CMMFTransferBuffer* aOldBuffer)
sl@0: 	{
sl@0: 	CMMFTransferBuffer* buffer = NULL;
sl@0: 
sl@0: 	RTransferBuffer* transBuffer = new  (ELeave) RTransferBuffer;
sl@0: 	
sl@0: 	TCleanupItem bufferCleanupItem(DoCleanupRHandleBase, transBuffer); //closes and deletes.
sl@0: 	CleanupStack::PushL(bufferCleanupItem);
sl@0: 
sl@0: 	RTransferWindow* transWindow = new (ELeave) RTransferWindow;
sl@0: 	
sl@0: 	TCleanupItem windowCleanupItem(DoCleanupRHandleBase, transWindow); //closes and deletes.
sl@0: 	CleanupStack::PushL(windowCleanupItem);
sl@0: 
sl@0: 	User::LeaveIfError(transBuffer->Create(aBufferSize));
sl@0: 	User::LeaveIfError(transWindow->Create(aBufferSize));
sl@0: 	User::LeaveIfError(transWindow->MapInBuffer(*transBuffer));
sl@0: 
sl@0: 	buffer = CMMFTransferBuffer::NewL(*transWindow);
sl@0: 
sl@0: 	delete aOldBuffer; //closes RTransferWindow
sl@0: 	delete iTransferWindow;
sl@0: 
sl@0: 	if(iTransferBuffer)
sl@0: 		{
sl@0: 		iTransferBuffer->Close();
sl@0: 		}
sl@0: 	delete iTransferBuffer;
sl@0: 
sl@0: 	iTransferBuffer = transBuffer;
sl@0: 	iTransferWindow = transWindow;
sl@0: 
sl@0: 	CleanupStack::Pop(transWindow); 
sl@0: 	CleanupStack::Pop(transBuffer); 
sl@0: 
sl@0: 	return buffer;
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: 
sl@0: #ifdef __USE_MMF_PTRBUFFERS__
sl@0: CMMFPtrBuffer* CMMFSwCodecDataPath::CreatePtrBufferL(TUint aBufferSize)
sl@0: 	{
sl@0: 	CMMFPtrBuffer* buffer = NULL;
sl@0: 	if (iPtrBufferMemoryBlock)
sl@0: 		{
sl@0: 		delete iPtrBufferMemoryBlock;//incase already exisits
sl@0: 		iPtrBufferMemoryBlock = NULL;
sl@0: 		}
sl@0: 	iPtrBufferMemoryBlock = HBufC8::NewL(aBufferSize);
sl@0: 	TPtr8 ptrMemoryBlock(iPtrBufferMemoryBlock->Des());
sl@0: 	buffer = CMMFPtrBuffer::NewL(ptrMemoryBlock);
sl@0: 	return buffer;
sl@0: 	}
sl@0: #endif  // __USE_MMF_PTRBUFFERS__
sl@0: 
sl@0: 
sl@0: