videoeditorengine/audioeditorengine/src/ProcVisualizationAO.cpp
author Mikael Laine <mikael.laine@ixonos.com>
Fri, 29 Jan 2010 14:08:33 +0200
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/*
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* Copyright (c) 2010 Ixonos Plc.
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - Initial contribution
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*
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* Contributors:
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* Ixonos Plc
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*
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* Description:  
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*
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*/
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#include "ProcVisualizationAO.h"
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#include "ProcVisProcessor.h"
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#include "AudPanic.h"
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void CProcVisualizationAO::RunL()
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    {
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    __ASSERT_DEBUG(iProcVisProcessor != 0, TAudPanic::Panic(TAudPanic::EInternal));
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    __ASSERT_DEBUG(iObserver != 0, TAudPanic::Panic(TAudPanic::EInternal));
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    if(iVisualizationState == EProcVisualizationIdle) 
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        {
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        TAudPanic::Panic(TAudPanic::EInternal);
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        }
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    else if (iVisualizationState == EProcGettingClipVisualization) 
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        {
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        TBool completed = EFalse;
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        TInt progress = 0;
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        TRAPD(err, completed = iProcVisProcessor->VisualizeClipPieceL(progress));
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        if (err != KErrNone)
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            {
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            delete iProcVisProcessor;
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            iProcVisProcessor = 0;
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            MAudVisualizationObserver* observer = iObserver;
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            iObserver = 0;
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            iSize = 0;
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            iVisualizationState = EProcVisualizationIdle;
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            observer->NotifyClipInfoVisualizationCompleted(*iClipInfo, err, NULL, 0);
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            }
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        else if (completed)
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            {
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            TInt8* visualization = 0;
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            TInt size = 0;
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            TRAPD(err2, iProcVisProcessor->GetFinalVisualizationL(visualization, size));
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            if (err2 != KErrNone)
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                {
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                MAudVisualizationObserver* observer = iObserver;
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                iObserver = 0;
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                if (visualization != 0) delete[] visualization;
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                delete iProcVisProcessor;
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                iProcVisProcessor = 0;
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                iVisualizationState = EProcVisualizationIdle;
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                observer->NotifyClipInfoVisualizationCompleted(*iClipInfo, err2, 0, 0);
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                return;
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                }
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            delete iProcVisProcessor;
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            iProcVisProcessor = 0;
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            MAudVisualizationObserver* observer = iObserver;
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            iObserver = 0;
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            iSize = 0;
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            iVisualizationState = EProcVisualizationIdle;
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            // NOTE: the upper level application is responsible for releasing "visualization"
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            observer->NotifyClipInfoVisualizationCompleted(*iClipInfo, KErrNone, visualization, size);
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            }
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        else
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            {
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            // progress is sent every 1 percent
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            if (iPreviousProgressValue < progress)
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                {
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                iObserver->NotifyClipInfoVisualizationProgressed(*iClipInfo, progress);
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                iPreviousProgressValue = progress;
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                }
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            SetActive();
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            TRequestStatus* status = &iStatus;
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            User::RequestComplete(status, KErrNone);
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            }
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        }
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    }
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void CProcVisualizationAO::DoCancel() 
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    {
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    // ref to observer should be reset before callback to avoid recursion
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    MAudVisualizationObserver* observer = iObserver;
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    iObserver = 0;
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    // ref to clipInfo is good to reset before callback
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    const CAudClipInfo* clipInfo = iClipInfo;
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    iClipInfo = 0;
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    // processor not needed and should not exist any more; a new processor will be created for next visualization
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    delete iProcVisProcessor;
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    iProcVisProcessor = 0;
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    if ((observer != 0) && (iVisualizationState == EProcGettingClipVisualization))
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        {
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        // reset state
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        iVisualizationState = EProcVisualizationIdle;
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        // note! this callback at least at the time of writing deletes this object => no operations should be done after this call
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        observer->NotifyClipInfoVisualizationCompleted(*clipInfo, KErrCancel, 0, 0);
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        }
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    }
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CProcVisualizationAO* CProcVisualizationAO::NewL() 
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    {
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    CProcVisualizationAO* self = new (ELeave) CProcVisualizationAO();
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    CleanupStack::PushL(self);
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    self->ConstructL();
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    CleanupStack::Pop(self);
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    return self;
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    }
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CProcVisualizationAO::~CProcVisualizationAO()
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    {
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    // cancel the active object; it also deletes or resets member variables
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    Cancel();
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    }
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void CProcVisualizationAO::ConstructL() 
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    {
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    // nothing to do; iProcVisProcessor will be created when started
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    }
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CProcVisualizationAO::CProcVisualizationAO() : 
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        CActive(0),
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        iVisualizationState(EProcVisualizationIdle) 
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        {
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    CActiveScheduler::Add(this);
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    }
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void CProcVisualizationAO::StartClipVisualizationL(const CAudClipInfo* aClipInfo, TInt aSize,
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                                                   MAudVisualizationObserver& aObserver, 
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                                                   TInt aPriority) 
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    {
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    if (iVisualizationState != EProcVisualizationIdle || iClipInfo != 0) 
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        {
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        TAudPanic::Panic(TAudPanic::EVisualizationProcessAlreadyRunning);
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        }
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    iSize = aSize;
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    iClipInfo = aClipInfo;
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    iProcVisProcessor = CProcVisProcessor::NewL();
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    iPreviousProgressValue = 0;
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    TRAPD(err, iProcVisProcessor->VisualizeClipL(aClipInfo, aSize));
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    if (err != KErrNone)
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        {
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        delete iProcVisProcessor;
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        iProcVisProcessor = 0;
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        aObserver.NotifyClipInfoVisualizationCompleted(*aClipInfo, err, 0, 0);
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        User::Leave(err);
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        }
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    aObserver.NotifyClipInfoVisualizationStarted(*aClipInfo, KErrNone);
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    iObserver = &aObserver;
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    SetPriority(aPriority);
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    SetActive();
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    TRequestStatus* status = &iStatus;
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    User::RequestComplete(status, KErrNone);
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    iVisualizationState = EProcGettingClipVisualization;
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    }
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void CProcVisualizationAO::CancelVisualization() 
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    {
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    Cancel();
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    }
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