/*

 * 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 audio equalizer proxy class

 *

 */

 // INCLUDE FILES

 #ifdef _DEBUG

 #include <e32svr.h>

 #endif

 #include "AudioEqualizerProxy.h"

 #include "AudioEqualizerEventObserver.h"

 #include <CustomInterfaceUtility.h>

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

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

 // CAudioEqualizerProxy::CAudioEqualizerProxy

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

 // might leave.

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

 //

 CAudioEqualizerProxy::CAudioEqualizerProxy(

 	TMMFMessageDestinationPckg aMessageHandler,

 	MCustomCommand& aCustomCommand,

 	CCustomInterfaceUtility* aCustomInterfaceUtility )

 	: 	iCustomCommand(&aCustomCommand),

 		iMessageHandler(aMessageHandler),

 		iCustomInterfaceUtility(aCustomInterfaceUtility)

     {

     }

 // Destructor

 CAudioEqualizerProxy::~CAudioEqualizerProxy()

     {

     // Remove the custom interface message handler before we destroy the proxy.

     if(iCustomInterfaceUtility)

         iCustomInterfaceUtility->RemoveCustomInterface(iMessageHandler);

 	delete iAudioEqualizerEventObserver;

 	delete iCustomInterfaceUtility;

 	}

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

 // CAudioEqualizerProxy::NewL

 // Static function for creating an instance of the Audio Equalizer object.

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

 //

 EXPORT_C CAudioEqualizerProxy* CAudioEqualizerProxy::NewL(

 	TMMFMessageDestinationPckg aMessageHandler,

     MCustomCommand& aCustomCommand,

     CCustomInterfaceUtility* aCustomInterfaceUtility )

     {

     CAudioEqualizerProxy* self = new (ELeave) CAudioEqualizerProxy(aMessageHandler, aCustomCommand, aCustomInterfaceUtility);

     CleanupStack::PushL(self);

     self->ConstructL();

     CleanupStack::Pop(self);

     return self;

 	}

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

 // CAudioEqualizerProxy::ConstructL

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

 //

 void CAudioEqualizerProxy::ConstructL()

     {

 #ifdef _DEBUG

     RDebug::Print(_L("CAudioEqualizerProxy::ConstructL"));

 #endif

     iAudioEqualizerEventObserver = CAudioEqualizerEventObserver::NewL(iMessageHandler, *iCustomCommand, *this);

     StartObserver();

     // sends a message to fetch initial data.

     TEfAudioEqualizerDataPckg dataPckgFrom;

 	iCustomCommand->CustomCommandSync(iMessageHandler, (TInt)EAefInitialize, KNullDesC8, KNullDesC8, dataPckgFrom);

 	SetEffectData(dataPckgFrom);

 	TUint8 band = 0;

 	TPckgBuf<TUint8> bandPckg;

 	bandPckg() = 0;

 	iCustomCommand->CustomCommandSync(iMessageHandler, (TInt)EAefGetNumberOfBands, KNullDesC8, KNullDesC8, bandPckg);

 	band = bandPckg();

 	if ( !band ) // Number of bands should be > 0.

 		{

 		User::Leave(KErrNotReady);

 		}

 	TEfAudioEqualizerBand bandData;

 	TEfAudioEqualizerBandDataPckg bandDataPckg;

 	TInt8 numberOfBands = band;

 	for(TInt i=1; i<=numberOfBands; i++)

 		{

 		band = i;

 		bandPckg() = band;

 		iCustomCommand->CustomCommandSync(iMessageHandler, (TInt)EAefInitializeBand, bandPckg, KNullDesC8, bandDataPckg);

 		bandData = bandDataPckg();

 		if(iBandsData.Append(bandData))

 			{

 			User::Leave(KErrNoMemory);

 			}

 		}

 	}

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

 // CAudioEqualizerProxy::ApplyL

 // Apply the Audio Equalizer settings.

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

 //

 EXPORT_C void CAudioEqualizerProxy::ApplyL()

 	{

 #ifdef _DEBUG

     RDebug::Print(_L("CAudioEqualizerProxy::Apply"));

 #endif

 	if ( !iHaveUpdateRights )

 		{

 		User::Leave(KErrAccessDenied);

 		}

 //	TUint32 mask = 1;

 	iAudioEqualizerData.iEnabled = iEnabled;

 	iAudioEqualizerData.iEnforced = iEnforced;

 	iAudioEqualizerData.iHaveUpdateRights = iHaveUpdateRights;

 	iCustomCommand->CustomCommandSync(iMessageHandler, (TInt)EAefApply, DoEffectData(), KNullDesC8);

 #ifdef _DEBUG

     RDebug::Print(_L("CAudioEqualizerProxy::Apply - BandChange = %x"), iBandChange);

 #endif

 	iCustomCommand->CustomCommandSync(iMessageHandler, (TInt)EAefApplyBand, DoBandDataL(1, ETrue), KNullDesC8);

 		iBandChange = 0; // clear flags

 	}

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

 // CAudioEqualizerProxy::StartObserver

 // Starts the event observer. The event observer monitors asynchronous events

 // from the message handler.

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

 //

 void CAudioEqualizerProxy::StartObserver()

 	{

 #ifdef _DEBUG

     RDebug::Print(_L("CAudioEqualizerProxy::StartObserver"));

 #endif

 	iAudioEqualizerEventObserver->Start();

 	}

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

 // CAudioEqualizerProxy::AudioEqualizerEvent

 // Checks which data member has changed and notify the observers.

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

 //

 void CAudioEqualizerProxy::AudioEqualizerEventL(

 	const TDesC8& aBuffer )

 	{

 #ifdef _DEBUG

     RDebug::Print(_L("CAudioEqualizerProxy::AudioEqualizerEventL"));

 #endif

 	TEfAudioEqualizerCombinedDataPckg dataPckgFrom;

 	dataPckgFrom.Copy(aBuffer);

 	TEfAudioEqualizerCombined newEqualizerCombinedData = dataPckgFrom();

 	TUint8 event = 0;

 	if ( newEqualizerCombinedData.iAudioEqualizerDataValid ) // Equalizer Data Changed

 		{

 		if ( newEqualizerCombinedData.iEnabled != iAudioEqualizerData.iEnabled )

 			{

 			iAudioEqualizerData.iEnabled = newEqualizerCombinedData.iEnabled;

 			iEnabled = newEqualizerCombinedData.iEnabled;

 			if ( iAudioEqualizerData.iEnabled )

 				{

 				event = MAudioEffectObserver::KEnabled;

 				}

 			else

 				{

 				event = MAudioEffectObserver::KDisabled;

 				}

 			}

 		else if ( newEqualizerCombinedData.iEnforced != iAudioEqualizerData.iEnforced )

 			{

 			iAudioEqualizerData.iEnforced = newEqualizerCombinedData.iEnforced;

 			iEnforced = newEqualizerCombinedData.iEnforced;

 			if ( iAudioEqualizerData.iEnforced )

 				{

 				event = MAudioEffectObserver::KEnforced;

 				}

 			else

 				{

 				event = MAudioEffectObserver::KNotEnforced;

 				}

 			}

 		else if ( newEqualizerCombinedData.iHaveUpdateRights != iAudioEqualizerData.iHaveUpdateRights )

 			{

 			iAudioEqualizerData.iHaveUpdateRights = newEqualizerCombinedData.iHaveUpdateRights;

 			iHaveUpdateRights = newEqualizerCombinedData.iHaveUpdateRights;

 			if ( iAudioEqualizerData.iHaveUpdateRights )

 				{

 				event = MAudioEffectObserver::KGainedUpdateRights;

 				}

 			else

 				{

 				event = MAudioEffectObserver::KLostUpdateRights;

 				}

 			}

 		}

 	else if ( newEqualizerCombinedData.iAudioEqualizerBandDataValid ) // Equalizer band data changed

 		{

 		TInt bandId = newEqualizerCombinedData.iBandId-1;

 		iBandsData[bandId].iBandLevel = newEqualizerCombinedData.iBandLevel;

 		iBandsData[bandId].iBandWidth = newEqualizerCombinedData.iBandWidth;

 		iBandsData[bandId].iCenterFrequency = newEqualizerCombinedData.iCenterFrequency;

 		iBandsData[bandId].iCrossoverFrequency = newEqualizerCombinedData.iCrossoverFrequency;

 		event = MAudioEffectObserver::KSpecificEffectBase + newEqualizerCombinedData.iBandId;

 		}

 	if (!event)

 		return;

 	for ( TInt i = 0; i < iObservers.Count(); i++ )

 		{

 		iObservers[i]->EffectChanged(this, event);

 		}

 	}

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