/*

 * 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 StereoWidening effect message handler class.

 *

 */

 // INCLUDE FILES

 #include "StereoWideningMessageHandler.h"

 #include "StereoWideningMessageTypes.h"

 #include <StereoWideningBase.h>

 #include "EffectDataQueItem.h"

 #ifdef _DEBUG

 #include <e32svr.h>

 #endif

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

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

 // might leave.

 //

 CStereoWideningMessageHandler::CStereoWideningMessageHandler(CStereoWidening* aStereoWidening)

     :	CMMFObject(KUidStereoWideningEffect),

     	iStereoWidening(NULL),

     	iMessage(NULL),

     	iRegistered(EFalse),

     	iEffectDataQue(NULL)

     {

   	  iStereoWidening = aStereoWidening;

     }

 EXPORT_C CStereoWideningMessageHandler* CStereoWideningMessageHandler::NewL(

 	TAny* aCustomInterface )

     {

     CStereoWidening* aStereoWidening = (CStereoWidening*)aCustomInterface;

     CStereoWideningMessageHandler* self = new (ELeave) CStereoWideningMessageHandler(aStereoWidening);

 	self->ConstructL();

     return self;

     }

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

 // CStereoWideningMessageHandler::ConstructL

 // Symbian 2nd phase constructor can leave.

 // Create and initializes the effect data queue.

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

 //

 void CStereoWideningMessageHandler::ConstructL()

 	{

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

 	}

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

 // CStereoWideningMessageHandler::~CStereoWideningMessageHandler

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

 // The observation message must be completed if outstanding.

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

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

 //

 CStereoWideningMessageHandler::~CStereoWideningMessageHandler()

 	{

 #ifdef _DEBUG

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

 #endif

     if(iStereoWidening)

 	    iStereoWidening->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 iStereoWidening;

 	}

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

 // CStereoWideningMessageHandler::HandleRequest

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

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

 //

 void CStereoWideningMessageHandler::HandleRequest(

 	TMMFMessage& aMessage )

 	{

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

 	TRAPD(error,DoHandleRequestL(aMessage));

 	if ( error )

 		{

 		aMessage.Complete(error);

 		}

 	}

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

 // CStereoWideningMessageHandler::DoHandleRequestL

 // Dispatches the message to the appropriate handler.

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

 //

 void CStereoWideningMessageHandler::DoHandleRequestL(

 	TMMFMessage& aMessage )

 	{

 	switch( aMessage.Function() )

 		{

 		case EAswefInitialize:

 			{

 			DoInitializeL(aMessage);

 			break;

 			}

 		case EAswefApply:

 			{

 			DoApplyL(aMessage);

 			break;

 			}

 		case EAswefObserve:

 			{

 			DoObserveL(aMessage);

 			break;

 			}

 		default:

 			{

 			aMessage.Complete(KErrNotSupported);

 			}

 		}

 	}

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

 // CStereoWideningMessageHandler::DoInitializeL

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

 //

 void CStereoWideningMessageHandler::DoInitializeL(TMMFMessage& aMessage)

 	{

 #ifdef _DEBUG

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

 #endif

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

 	aMessage.Complete(KErrNone);

 	}

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

 // CStereoWideningMessageHandler::DoApplyL

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

 // data is applied to the CI StereoWidening object.

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

 //

 void CStereoWideningMessageHandler::DoApplyL(

 	TMMFMessage& aMessage )

 	{

 #ifdef _DEBUG

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

 #endif

     TEfStereoWideningDataPckg stereoWideningPckgFromClient;

     aMessage.ReadData1FromClient(stereoWideningPckgFromClient);

 	iStereoWidening->SetEffectData(stereoWideningPckgFromClient);

 	iStereoWidening->ApplyL();

 	aMessage.Complete(KErrNone);

 	}

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

 // CStereoWideningMessageHandler::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 CStereoWideningMessageHandler::DoObserveL(

 	TMMFMessage& aMessage )

 	{

 #ifdef _DEBUG

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

 #endif

 	if ( !iRegistered )

 		{

 		iStereoWidening->RegisterObserverL(*this);

 		iRegistered = ETrue;

 		}

 	if ( iEffectDataQue->IsEmpty() )

 		{

 		//iMessage = &aMessage;

 		iMessage = new(ELeave) TMMFMessage(aMessage);

 		}

 	else

 		{

 		TEfStereoWideningDataPckg dataPckg;

 		CEffectDataQueItem* item = iEffectDataQue->First();

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

 		aMessage.WriteDataToClient(dataPckg);

 		aMessage.Complete(KErrNone);

 		iEffectDataQue->Remove(*item);

 		delete item;

 		}

 	}

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

 // CStereoWideningMessageHandler::EffectChanged

 // The CI StereoWidening object has changed state.

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

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

 // packaged and queued.

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

 //

 void CStereoWideningMessageHandler::EffectChanged(

 	const CAudioEffect* aAudioEffect,

 	TUint8 /*aEvent*/ )

 	{

 #ifdef _DEBUG

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

 #endif

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

 		{

 		iMessage->WriteDataToClient(((CStereoWidening*)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 = ((CStereoWidening*)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("CStereoWideningMessageHandler::EffectChanged Error Allocating Memory %d"),err1);

 #endif

 			}

 		}

 	}

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

 // End of File