1 /*

     2 * Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  This class is used for setting volume to audio player

    15 *

    16 */

    17 

    18 

    19 #include <logger.h>

    20 #include "StreamControl.h"

    21 #include "EffectControl.h"

    22 #include "MMControlFactory.h"

    23 #include "cmmaemcaudiovolumecontrol.h"

    24 #include "cmmaemcaudioplayer.h"

    25 

    26 using multimedia ::KVolumeEffectControl;

    27 using multimedia ::MStreamControl;

    28 using multimedia ::MEffectControl;

    29 using multimedia ::CMultimediaFactory;

    30 

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

    32 {

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

    34     CleanupStack::PushL(self);

    35     self->ConstructL();

    36     CleanupStack::Pop(self);

    37     return self;

    38 }

    39 

    40 EXPORT_C CMMAEMCAudioVolumeControl::CMMAEMCAudioVolumeControl(CMMAEMCAudioPlayer& aPlayer)

    41         : CMMAVolumeControl(&aPlayer), iPlayer(aPlayer)

    42 {

    43 }

    44 

    45 void CMMAEMCAudioVolumeControl::ConstructL()

    46 {

    47     ConstructBaseL();

    48     MStreamControl* streamControl = iPlayer.StreamControl();

    49     CMultimediaFactory* mmFactory = iPlayer.MMFactory();

    50 

    51     MEffectControl* temp(NULL);

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

    53     iVolCntrl = static_cast<MVolumeControl*>(temp);

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

    55 }

    56 

    57 CMMAEMCAudioVolumeControl::~CMMAEMCAudioVolumeControl()

    58 {

    59     MStreamControl* streamControl = iPlayer.StreamControl();

    60     CMultimediaFactory* mmFactory = iPlayer.MMFactory();

    61 

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

    63     {

    64         streamControl->RemoveEffect(*iVolCntrl);

    65     }

    66 

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

    68 

    69     if (NULL != mmFactory)

    70     {

    71         mmFactory->DeleteEffectControl(temp);

    72     }

    73 }

    74 

    75 EXPORT_C void CMMAEMCAudioVolumeControl::DoSetLevelL(TInt aLevel)

    76 {

    77     TInt maxVolume = 0;

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

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

    80     TInt volLevel = aLevel * maxVolume / KMMAVolumeMaxLevel;

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

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

    83 }

    84 

    85 EXPORT_C TInt CMMAEMCAudioVolumeControl::DoGetLevelL()

    86 {

    87     TInt maxVolume = 0;

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

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

    90     TInt volume = 0;

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

    92     // result is in range 0..100

    93     return (volume * KMMAVolumeMaxLevel / maxVolume);

    94 }

    95 

    96 //  END OF FILE