/*

 * 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