devsoundextensions/effects/AudioEqualizer/AudioEqualizerMessageHandler/src/AudioEqualizerMessageHandler.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/devsoundextensions/effects/AudioEqualizer/AudioEqualizerMessageHandler/src/AudioEqualizerMessageHandler.cpp Thu Oct 07 22:34:12 2010 +0100
@@ -0,0 +1,384 @@
+/*
+* 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 AudioEqualizer effect message handler class.
+*
+*/
+
+
+
+// INCLUDE FILES
+#include "AudioEqualizerMessageHandler.h"
+#include "AudioEqualizerMessageTypes.h"
+#include <AudioEqualizerBase.h>
+#include "EffectDataQueItem.h"
+#ifdef _DEBUG
+#include <e32svr.h>
+#endif
+
+// ================= MEMBER FUNCTIONS =======================
+
+// C++ default constructor can NOT contain any code, that
+// might leave.
+//
+CAudioEqualizerMessageHandler::CAudioEqualizerMessageHandler(
+ CAudioEqualizer* aAudioEqualizer )
+ : CMMFObject(KUidAudioEqualizerEffect),
+ iAudioEqualizer(NULL),
+ iMessage(NULL),
+ iRegistered(EFalse),
+ iEffectDataQue(NULL)
+ {
+ iAudioEqualizer = aAudioEqualizer;
+ }
+
+
+EXPORT_C CAudioEqualizerMessageHandler* CAudioEqualizerMessageHandler::NewL(
+ TAny* aCustomInterface )
+ {
+ CAudioEqualizer* audioEqualizer = (CAudioEqualizer*)aCustomInterface;
+ CAudioEqualizerMessageHandler* self = new (ELeave) CAudioEqualizerMessageHandler(audioEqualizer);
+ self->ConstructL();
+ return self;
+ }
+
+
+// -----------------------------------------------------------------------------
+// CAudioEqualizerMessageHandler::ConstructL
+// Symbian 2nd phase constructor can leave.
+// Create and initializes the effect data queue.
+// -----------------------------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::ConstructL()
+ {
+ iEffectDataQue = new(ELeave) TSglQue<CEffectDataQueItem>(_FOFF(CEffectDataQueItem, iLink));
+ }
+
+
+// -----------------------------------------------------------------------------
+// CAudioEqualizerMessageHandler::~CAudioEqualizerMessageHandler
+// Before going away, unregister with the CI AudioEqualizer object.
+// The observation message must be completed if outstanding.
+// The effect data queue must be emptied and destroyed.
+// -----------------------------------------------------------------------------
+//
+CAudioEqualizerMessageHandler::~CAudioEqualizerMessageHandler()
+ {
+
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::~CAudioEqualizerMessageHandler"));
+#endif
+
+ if(iAudioEqualizer)
+ iAudioEqualizer->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 iAudioEqualizer;
+
+ }
+
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::HandleRequest
+// (other items were commented in a header).
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::HandleRequest(
+ TMMFMessage& aMessage )
+ {
+ ASSERT(aMessage.Destination().InterfaceId() == KUidAudioEqualizerEffect);
+ TRAPD(error,DoHandleRequestL(aMessage));
+ if ( error )
+ {
+ aMessage.Complete(error);
+ }
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoHandleRequestL
+// Dispatches the message to the appropriate handler.
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoHandleRequestL(
+ TMMFMessage& aMessage )
+ {
+ switch( aMessage.Function() )
+ {
+ case EAefInitialize:
+ {
+ DoInitializeL(aMessage);
+ break;
+ }
+ case EAefInitializeBand:
+ {
+ DoInitializeBandL(aMessage);
+ break;
+ }
+ case EAefGetNumberOfBands:
+ {
+ DoGetNumberOfBandsL(aMessage);
+ break;
+ }
+ case EAefApply:
+ {
+ DoApplyL(aMessage);
+ break;
+ }
+ case EAefApplyBand:
+ {
+ DoApplyBandL(aMessage);
+ break;
+ }
+ case EAefObserve:
+ {
+ DoObserveL(aMessage);
+ break;
+ }
+ default:
+ {
+ aMessage.Complete(KErrNotSupported);
+ }
+ }
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoInitializeL
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoInitializeL(TMMFMessage& aMessage)
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoInitializeL"));
+#endif
+ aMessage.WriteDataToClient(iAudioEqualizer->DoEffectData());
+ aMessage.Complete(KErrNone);
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoInitializeBandL
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoInitializeBandL(TMMFMessage& aMessage)
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoInitializeBandL"));
+#endif
+ TUint8 band = 0;
+ TPckgBuf<TUint8> bandPckg;
+ aMessage.ReadData1FromClient(bandPckg);
+ band = bandPckg();
+ aMessage.WriteDataToClient(iAudioEqualizer->DoBandDataL(band, EFalse));
+ aMessage.Complete(KErrNone);
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoGetNumberOfBandsL
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoGetNumberOfBandsL(TMMFMessage& aMessage)
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoGetNumberOfBandsL"));
+#endif
+ TUint8 band = iAudioEqualizer->NumberOfBands();
+ TPckgBuf<TUint8> bandPckg(band);
+ aMessage.WriteDataToClient(bandPckg);
+ aMessage.Complete(KErrNone);
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoApplyL
+// Extracts the data from the message. The client AudioEqualizer
+// data is applied to the CI AudioEqualizer object.
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoApplyL(
+ TMMFMessage& aMessage )
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoApplyL"));
+#endif
+ TEfAudioEqualizerDataPckg audioEqualizerPckgFromClient;
+ aMessage.ReadData1FromClient(audioEqualizerPckgFromClient);
+ iAudioEqualizer->SetEffectData(audioEqualizerPckgFromClient);
+// iAudioEqualizer->ApplyL();
+ aMessage.Complete(KErrNone);
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::DoApplyBandL
+// Extracts the data from the message. The client Audio Equalizer
+// band data is applied to the CI AudioEqualizer object.
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::DoApplyBandL(
+ TMMFMessage& aMessage )
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoApplyBandL"));
+#endif
+ TEfAudioEqualizerBandDataPckg audioEqualizerBandDataPckgFromClient;
+ HBufC8* bandDataBuf = HBufC8::NewL(iAudioEqualizer->NumberOfBands() * sizeof(TEfAudioEqualizerBand));
+ TPtr8 des = bandDataBuf->Des();
+ des.SetLength(bandDataBuf->Size());
+
+ aMessage.ReadData1FromClient(des);
+ //aMessage.ReadData1FromClient(audioEqualizerBandDataPckgFromClient);
+ //iAudioEqualizer->SetBandDataL(1,audioEqualizerBandDataPckgFromClient);
+ iAudioEqualizer->SetBandDataL(2,des);
+ delete bandDataBuf;
+ iAudioEqualizer->ApplyL();
+ aMessage.Complete(KErrNone);
+ }
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::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 CAudioEqualizerMessageHandler::DoObserveL(
+ TMMFMessage& aMessage )
+ {
+
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::DoObserveL"));
+#endif
+
+ if ( !iRegistered )
+ {
+ iAudioEqualizer->RegisterObserverL(*this);
+ iRegistered = ETrue;
+ }
+
+ if ( iEffectDataQue->IsEmpty() )
+ {
+ //iMessage = &aMessage;
+ iMessage = new(ELeave) TMMFMessage(aMessage);
+ }
+ else
+ {
+ TEfAudioEqualizerCombinedDataPckg dataPckg;
+ CEffectDataQueItem* item = iEffectDataQue->First();
+ dataPckg.Copy(item->EffectData());
+ aMessage.WriteDataToClient(dataPckg);
+ aMessage.Complete(KErrNone);
+ iEffectDataQue->Remove(*item);
+ delete item;
+ }
+ }
+
+// ---------------------------------------------------------
+// CAudioEqualizerMessageHandler::EffectChanged
+// The CI AudioEqualizer object has changed state.
+// The observation message is completed if no data has been
+// queued up. Otherwise, the CI AudioEqualizer object's data is
+// packaged and queued.
+// ---------------------------------------------------------
+//
+void CAudioEqualizerMessageHandler::EffectChanged(
+ const CAudioEffect* aAudioEffect,
+ TUint8 aEvent )
+ {
+#ifdef _DEBUG
+ RDebug::Print(_L("CAudioEqualizerMessageHandler::EffectChanged"));
+#endif
+
+ TEfAudioEqualizerCombined data;
+ data.iAudioEqualizerDataValid = EFalse;
+ data.iAudioEqualizerBandDataValid = EFalse;
+
+ if ( aEvent < MAudioEffectObserver::KSpecificEffectBase )
+ {
+ data.iEnabled = ((CAudioEqualizer*)aAudioEffect)->IsEnabled();
+ data.iHaveUpdateRights = ((CAudioEqualizer*)aAudioEffect)->HaveUpdateRights();
+ data.iEnforced = ((CAudioEqualizer*)aAudioEffect)->IsEnforced();
+ data.iAudioEqualizerDataValid = ETrue;
+ }
+ else
+ {
+ TUint8 band = aEvent - MAudioEffectObserver::KSpecificEffectBase;
+ data.iBandId = band;
+ data.iBandLevel = ((CAudioEqualizer*)aAudioEffect)->BandLevel(band);
+ data.iBandWidth = ((CAudioEqualizer*)aAudioEffect)->BandWidth(band);
+ data.iCenterFrequency = ((CAudioEqualizer*)aAudioEffect)->CenterFrequency(band);
+ data.iCrossoverFrequency = ((CAudioEqualizer*)aAudioEffect)->CrossoverFrequency(band);
+ data.iAudioEqualizerBandDataValid = ETrue;
+ }
+
+ TEfAudioEqualizerCombinedDataPckg dataPckg(data);
+
+ if ( iMessage && !iMessage->IsCompleted() && iEffectDataQue->IsEmpty() )
+ {
+ iMessage->WriteDataToClient(dataPckg);
+ 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 = dataPckg.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("CAudioEqualizerMessageHandler::EffectChanged Error Allocating Memory %d"),err1);
+#endif
+ }
+ }
+
+ }
+
+
+// ========================== OTHER EXPORTED FUNCTIONS =========================
+
+
+
+// End of File