/*

 * 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 DistanceAttenuation effect message handler class.

 *

 */

 // INCLUDE FILES

 #include "DistanceAttenuationMessageHandler.h"

 #include "DistanceAttenuationMessageTypes.h"

 #include <DistanceAttenuationBase.h>

 #include "EffectDataQueItem.h"

 #ifdef _DEBUG

 #include <e32svr.h>

 #endif

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

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

 // might leave.

 //

 CDistanceAttenuationMessageHandler::CDistanceAttenuationMessageHandler(CDistanceAttenuation* aDistanceAttenuation)

     :	CMMFObject(KUidDistanceAttenuationEffect),

     	iDistanceAttenuation(NULL),

     	iMessage(NULL),

     	iRegistered(EFalse),

     	iEffectDataQue(NULL)

     {

   	  iDistanceAttenuation = aDistanceAttenuation;

     }

 EXPORT_C CDistanceAttenuationMessageHandler* CDistanceAttenuationMessageHandler::NewL(

 	TAny* aCustomInterface )

     {

     CDistanceAttenuation* aDistanceAttenuation = (CDistanceAttenuation*)aCustomInterface;

     CDistanceAttenuationMessageHandler* self = new (ELeave) CDistanceAttenuationMessageHandler(aDistanceAttenuation);

 	self->ConstructL();

     return self;

     }

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

 // CDistanceAttenuationMessageHandler::ConstructL

 // Symbian 2nd phase constructor can leave.

 // Create and initializes the effect data queue.

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

 //

 void CDistanceAttenuationMessageHandler::ConstructL()

 	{

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

 	}

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

 // CDistanceAttenuationMessageHandler::~CDistanceAttenuationMessageHandler

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

 // The observation message must be completed if outstanding.

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

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

 //

 CDistanceAttenuationMessageHandler::~CDistanceAttenuationMessageHandler()

 	{

 #ifdef _DEBUG

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

 #endif

     if(iDistanceAttenuation)

 	    iDistanceAttenuation->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 iDistanceAttenuation;

 	}

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

 // CDistanceAttenuationMessageHandler::HandleRequest

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

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

 //

 void CDistanceAttenuationMessageHandler::HandleRequest(

 	TMMFMessage& aMessage )

 	{

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

 	TRAPD(error,DoHandleRequestL(aMessage));

 	if ( error )

 		{

 		aMessage.Complete(error);

 		}

 	}

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

 // CDistanceAttenuationMessageHandler::DoHandleRequestL

 // Dispatches the message to the appropriate handler.

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

 //

 void CDistanceAttenuationMessageHandler::DoHandleRequestL(

 	TMMFMessage& aMessage )

 	{

 	switch( aMessage.Function() )

 		{

 		case EDaefInitialize:

 			{

 			DoInitializeL(aMessage);

 			break;

 			}

 		case EDaefApply:

 			{

 			DoApplyL(aMessage);

 			break;

 			}

 		case EDaefObserve:

 			{

 			DoObserveL(aMessage);

 			break;

 			}

 		default:

 			{

 			aMessage.Complete(KErrNotSupported);

 			}

 		}

 	}

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

 // CDistanceAttenuationMessageHandler::DoInitializeL

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

 //

 void CDistanceAttenuationMessageHandler::DoInitializeL(TMMFMessage& aMessage)

 	{

 #ifdef _DEBUG

     RDebug::Print(_L("CDistanceAttenuationMessageHandler::DoInitializeL"));

 #endif

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

 	aMessage.Complete(KErrNone);

 	}

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

 // CDistanceAttenuationMessageHandler::DoApplyL

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

 // data is applied to the CI DistanceAttenuation object.

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

 //

 void CDistanceAttenuationMessageHandler::DoApplyL(

 	TMMFMessage& aMessage )

 	{

 #ifdef _DEBUG

     RDebug::Print(_L("CDistanceAttenuationMessageHandler::DoApplyL"));

 #endif

     TEfDistanceAttenuationDataPckg distanceAttenuationPckgFromClient;

     aMessage.ReadData1FromClient(distanceAttenuationPckgFromClient);

 	iDistanceAttenuation->SetEffectData(distanceAttenuationPckgFromClient);

 	iDistanceAttenuation->ApplyL();

 	aMessage.Complete(KErrNone);

 	}

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

 // CDistanceAttenuationMessageHandler::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 CDistanceAttenuationMessageHandler::DoObserveL(

 	TMMFMessage& aMessage )

 	{

 #ifdef _DEBUG

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

 #endif

 	if ( !iRegistered )

 		{

 		iDistanceAttenuation->RegisterObserverL(*this);

 		iRegistered = ETrue;

 		}

 	if ( iEffectDataQue->IsEmpty() )

 		{

 		//iMessage = &aMessage;

 		iMessage = new(ELeave) TMMFMessage(aMessage);

 		}

 	else

 		{

 		TEfDistanceAttenuationDataPckg dataPckg;

 		CEffectDataQueItem* item = iEffectDataQue->First();

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

 		aMessage.WriteDataToClient(dataPckg);

 		aMessage.Complete(KErrNone);

 		iEffectDataQue->Remove(*item);

 		delete item;

 		}

 	}

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

 // CDistanceAttenuationMessageHandler::EffectChanged

 // The CI DistanceAttenuation object has changed state.

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

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

 // packaged and queued.

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

 //

 void CDistanceAttenuationMessageHandler::EffectChanged(

 	const CAudioEffect* aAudioEffect,

 	TUint8 /*aEvent*/ )

 	{

 #ifdef _DEBUG

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

 #endif

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

 		{

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

 		iMessage->Complete(KErrNone);

 		delete iMessage;

 		iMessage = NULL;

 		}

 	else

 		{

 		// Saves the data and complete an observation message next time around.

 		HBufC8* data = NULL;

 		TRAPD(err1,data = ((CDistanceAttenuation*)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("CDistanceAttenuationMessageHandler::EffectChanged Error Allocating Memory %d"),err1);

 #endif

 			}

 		}

 	}

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

 // End of File