/*

* Copyright (c) 2004 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:   Implementation of the SourceDoppler effect message handler class.

*

*/

// INCLUDE FILES

#include "SourceDopplerMessageHandler.h"

#include "SourceDopplerMessageTypes.h"

#include <SourceDopplerBase.h>

#include "EffectDataQueItem.h"

#ifdef _DEBUG

#include <e32svr.h>

#endif

// ================= MEMBER FUNCTIONS =======================

// C++ default constructor can NOT contain any code, that

// might leave.

//

CSourceDopplerMessageHandler::CSourceDopplerMessageHandler(

	CSourceDoppler* aDoppler )

    :	CMMFObject(KUidSourceDopplerEffect),

    	iDoppler(NULL),

    	iMessage(NULL),

    	iRegistered(EFalse),

    	iEffectDataQue(NULL)

    {

    iDoppler = aDoppler;

    }

EXPORT_C CSourceDopplerMessageHandler* CSourceDopplerMessageHandler::NewL(

	TAny* aCustomInterface )

    {

    CSourceDoppler* doppler = (CSourceDoppler*)aCustomInterface;

    CSourceDopplerMessageHandler* self = new (ELeave) CSourceDopplerMessageHandler(doppler);

	self->ConstructL();

    return self;

    }

// -----------------------------------------------------------------------------

// CSourceDopplerMessageHandler::ConstructL

// Symbian 2nd phase constructor can leave.

// Create and initializes the effect data queue.

// -----------------------------------------------------------------------------

//

void CSourceDopplerMessageHandler::ConstructL()

	{

	iEffectDataQue = new(ELeave) TSglQue<CEffectDataQueItem>(_FOFF(CEffectDataQueItem, iLink));

	}

// -----------------------------------------------------------------------------

// CSourceDopplerMessageHandler::~CSourceDopplerMessageHandler

// Before going away, unregister with the CI Doppler object.

// The observation message must be completed if outstanding.

// The effect data queue must be emptied and destroyed.

// -----------------------------------------------------------------------------

//

CSourceDopplerMessageHandler::~CSourceDopplerMessageHandler()

	{

#ifdef _DEBUG

    RDebug::Print(_L("CSourceDopplerMessageHandler::~CSourceDopplerMessageHandler"));

#endif

    if(iDoppler)

	    iDoppler->UnRegisterObserver(*this);

	iRegistered = EFalse;

	if(iMessage)

	{

		if ( !iMessage->IsCompleted() )

			{

			iMessage->Complete(KErrCancel);

			delete iMessage;

			}

	}

    if ( iEffectDataQue )

        {

        CEffectDataQueItem* queItem;

        while ( !iEffectDataQue->IsEmpty() )

            {

            queItem = iEffectDataQue->First();

            iEffectDataQue->Remove(*queItem);

            delete queItem;

            }

        delete iEffectDataQue;

        }

     delete iDoppler;

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::HandleRequest

// (other items were commented in a header).

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::HandleRequest(

	TMMFMessage& aMessage )

	{

	ASSERT(aMessage.Destination().InterfaceId() == KUidSourceDopplerEffect);

	TRAPD(error,DoHandleRequestL(aMessage));

	if ( error )

		{

		aMessage.Complete(error);

		}

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::DoHandleRequestL

// Dispatches the message to the appropriate handler.

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::DoHandleRequestL(

	TMMFMessage& aMessage )

	{

	switch( aMessage.Function() )

		{

		case ESourceDopplerOfInitialize: // Request to initialize the SourceDoppler

			{

			DoInitializeL(aMessage);

			break;

			}

		case ESourceDopplerOfApply: // Request to apply the SourceDoppler settings

			{

			DoApplyL(aMessage);

			break;

			}

		case ESourceDopplerOfObserve: // Observation request

			{

			DoObserveL(aMessage);

			break;

			}

		default:

			{

			aMessage.Complete(KErrNotSupported);

			}

		}

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::DoInitializeL

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::DoInitializeL(TMMFMessage& aMessage)

	{

	aMessage.WriteDataToClient(iDoppler->DoEffectData());

	aMessage.Complete(KErrNone);

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::DoApplyL

// Extracts the data from the message. The client doppler data

// is applied to the CI doppler object.

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::DoApplyL(

	TMMFMessage& aMessage )

	{

    TEfDopplerDataPckg dopplerPckgFromClient;

    aMessage.ReadData1FromClient(dopplerPckgFromClient);

	iDoppler->SetEffectData(dopplerPckgFromClient);

	iDoppler->ApplyL();

	aMessage.Complete(KErrNone);

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::DoObserveL

// Receives the observation request message and depending

// on the status of the effect data queue, the message is

// completed immediately or saved for later completion.

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::DoObserveL(

	TMMFMessage& aMessage )

	{

#ifdef _DEBUG

    RDebug::Print(_L("CSourceDopplerMessageHandler::DoObserveL"));

#endif

	if ( !iRegistered ) // Don't register again if we're registered.

		{

		iDoppler->RegisterObserverL(*this);

		iRegistered = ETrue;

		}

	if ( iEffectDataQue->IsEmpty() )

		{

		// Message is saved and completed when an event occurs

		iMessage = new(ELeave) TMMFMessage(aMessage);

		}

	else

		{

		TEfDopplerDataPckg dataPckg;

		CEffectDataQueItem* item = iEffectDataQue->First();

		dataPckg.Copy(item->EffectData());

		aMessage.WriteDataToClient(dataPckg);

		aMessage.Complete(KErrNone);

		iEffectDataQue->Remove(*item);

		delete item;

		}

	}

// ---------------------------------------------------------

// CSourceDopplerMessageHandler::EffectChanged

// The CI doppler object has changed state.

// The observation message is completed if no data has been

// queued up. Otherwise, the CI doppler object's data is

// packaged and queued.

// ---------------------------------------------------------

//

void CSourceDopplerMessageHandler::EffectChanged(

	const CAudioEffect* aAudioEffect,

	 TUint8 /*aEvent*/ )

	{

#ifdef _DEBUG

    RDebug::Print(_L("CSourceDopplerMessageHandler::EffectChanged"));

#endif

	if ( iMessage && !iMessage->IsCompleted() && iEffectDataQue->IsEmpty() )

		{

		iMessage->WriteDataToClient(((CSourceDoppler*)aAudioEffect)->DoEffectData());

		iMessage->Complete(KErrNone);

		delete iMessage;

		iMessage = NULL;

		}

	else // no message pending and there is no event queued up

		{

		// Saves the data and complete an observation message next time when

		// there is a pending message.

		HBufC8* data = NULL;

		TRAPD(err1,data = ((CSourceDoppler*)aAudioEffect)->DoEffectData().AllocL());

		if(!err1)

			{

				//CleanupStack::PushL(data);

				CEffectDataQueItem* item = NULL;

				TRAPD(err2,item = CEffectDataQueItem::NewL(data));

				if(!err2)

				{

					iEffectDataQue->AddLast(*item);

				}

				else

				{

					delete data;

				}

			}

		else

			{

#ifdef _DEBUG

				RDebug::Print(_L("CSourceDopplerMessageHandler::EffectChanged Error Allocating Memory %d"),err1);

#endif

			}

		}

	}

// ========================== OTHER EXPORTED FUNCTIONS =========================

// End of File