/*

* Copyright (c) 2002-2007 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:  This class is used for setting volume to audio player

*

*/

#include <jdebug.h>

#include "StreamControl.h"

#include "EffectControl.h"

#include "MMControlFactory.h"

#include "cmmaemcaudiovolumecontrol.h"

#include "cmmaemcaudioplayer.h"

using multimedia ::KVolumeEffectControl;

using multimedia ::MStreamControl;

using multimedia ::MEffectControl;

using multimedia ::CMultimediaFactory;

EXPORT_C CMMAEMCAudioVolumeControl* CMMAEMCAudioVolumeControl::NewL(CMMAEMCAudioPlayer& aPlayer)

{

    CMMAEMCAudioVolumeControl* self = new(ELeave)CMMAEMCAudioVolumeControl(aPlayer);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

EXPORT_C CMMAEMCAudioVolumeControl::CMMAEMCAudioVolumeControl(CMMAEMCAudioPlayer& aPlayer)

        : CMMAVolumeControl(&aPlayer), iPlayer(aPlayer)

{

}

void CMMAEMCAudioVolumeControl::ConstructL()

{

    ConstructBaseL();

    MStreamControl* streamControl = iPlayer.StreamControl();

    CMultimediaFactory* mmFactory = iPlayer.MMFactory();

    MEffectControl* temp(NULL);

    User::LeaveIfError(mmFactory->CreateEffectControl(KVolumeEffectControl, temp));

    iVolCntrl = static_cast<MVolumeControl*>(temp);

    User::LeaveIfError(streamControl->AddEffect(*iVolCntrl));

}

CMMAEMCAudioVolumeControl::~CMMAEMCAudioVolumeControl()

{

    MStreamControl* streamControl = iPlayer.StreamControl();

    CMultimediaFactory* mmFactory = iPlayer.MMFactory();

    if ((NULL != streamControl) && (NULL != iVolCntrl))

    {

        streamControl->RemoveEffect(*iVolCntrl);

    }

    MEffectControl* temp = static_cast<MEffectControl*>(iVolCntrl);

    if (NULL != mmFactory)

    {

        mmFactory->DeleteEffectControl(temp);

    }

}

EXPORT_C void CMMAEMCAudioVolumeControl::DoSetLevelL(TInt aLevel)

{

    TInt maxVolume = 0;

    User::LeaveIfError(iVolCntrl->GetMaxVolume(maxVolume));

    // aLevel is the desired volume in range 0..100

    TInt volLevel = aLevel * maxVolume / KMMAVolumeMaxLevel;

    User::LeaveIfError(iVolCntrl->SetVolume(volLevel));

    User::LeaveIfError(iVolCntrl->Apply());

}

EXPORT_C TInt CMMAEMCAudioVolumeControl::DoGetLevelL()

{

    TInt maxVolume = 0;

    User::LeaveIfError(iVolCntrl->GetMaxVolume(maxVolume));

    __ASSERT_DEBUG(maxVolume != 0, User::Invariant());

    TInt volume = 0;

    User::LeaveIfError(iVolCntrl->GetVolume(volume));

    // result is in range 0..100

    return (volume * KMMAVolumeMaxLevel / maxVolume);

}

//  END OF FILE