--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/mmapi_qt/baseline/src/cmmavolumecontrol.cpp	Fri May 14 15:47:24 2010 +0300
@@ -0,0 +1,239 @@
+/*
+* 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 volume setting
+*
+*/
+
+
+//  INCLUDE FILES
+
+#include "cmmavolumecontrol.h"
+#include "cmmaplayer.h"
+#include <logger.h>
+
+_LIT(KMMAVolumeErrorMsg, "Can't set volume level");
+
+const TInt KMMAJavaSoundIndex = 0;
+const TInt KMMAGlobalVolumeSoundIndex = 2;
+
+void CMMAVolumeControl::StaticSetLevelL(CMMAVolumeControl* aVolumeControl,
+                                        TInt aLevel)
+{
+    // Java level is the first
+    aVolumeControl->SetVolumeLevelL(KMMAJavaSoundIndex, aLevel);
+}
+
+void CMMAVolumeControl::StaticGetLevelL(CMMAVolumeControl* aVolumeControl,
+                                        TInt* aLevel)
+{
+    // Java level is the first
+    aVolumeControl->GetVolumeLevelL(KMMAJavaSoundIndex, aLevel);
+}
+
+
+CMMAVolumeControl::CMMAVolumeControl(CMMAPlayer* aPlayer)
+        : iPlayer(aPlayer), iLevel(KMMAVolumeMaxLevel)
+{
+}
+
+
+CMMAVolumeControl::~CMMAVolumeControl()
+{
+    iLevels.Close();
+}
+
+
+void CMMAVolumeControl::ConstructBaseL()
+{
+    iPlayer->AddStateListenerL(this);
+
+    // Add level for java, will set in StaticSetLevelL method.
+    // In constructor iLevels array is empty and Java level will be the first,
+    // KMMAJavaSoundIndex.
+    AddLevelL();
+
+    iLevel = CalculateLevel();
+
+    // The default value is not yet known. Volume control may change the
+    // volume of the controller before it has been retrieved so when the
+    // state of the player is changed the Java volume is retrieved from
+    // the controller.
+    iLevels[ KMMAJavaSoundIndex ] = KErrNotFound;
+}
+
+const TDesC& CMMAVolumeControl::ClassName() const
+{
+    return KMMAVolumeControlName;
+}
+
+void CMMAVolumeControl::SetLevelL(TInt aLevel)
+{
+    // Level cannot be set to derived control if player is not prefetched.
+    if (iPlayer->State() > CMMAPlayer::ERealized)
+    {
+        DoSetLevelL(aLevel);
+    }
+    iLevel = aLevel;
+}
+
+void CMMAVolumeControl::StateChanged(TInt aState)
+{
+    LOG1( EJavaMMAPI, EInfo, "CMMAVolumeControl::StateChanged - state %d", aState);
+    // Set the volume if the player is prefetched
+    if (aState == CMMAPlayer::EPrefetched)
+    {
+        TRAPD(error,
+        {
+            // Get the default value for the Java sound level
+            if (iLevels[ KMMAJavaSoundIndex ] == KErrNotFound)
+            {
+                iLevels[ KMMAJavaSoundIndex ] = DoGetLevelL();
+                iLevel = CalculateLevel();
+            }
+            SetLevelL(iLevel);
+
+        });
+        if (error != KErrNone)
+        {
+            iPlayer->PostStringEvent(CMMAPlayerEvent::EError,
+                                     KMMAVolumeErrorMsg);
+        }
+    }
+
+    // Level is already set for Global Volume so no need to set it again
+    // Notify the initial global volume value to java
+    // Notify only if STATE == CMMAPlayer::ERealized
+    // Error ID AKUR-7G69Q5 GLOBAL VOLUME EVENT CR
+    if (aState == CMMAPlayer::ERealized)
+    {
+        if ((iLevels.Count() - 1) == KMMAGlobalVolumeSoundIndex)
+        {
+            LOG( EJavaMMAPI, EInfo, "MMA::CMMAVolumeControl::StateChanged : Post GLOBAL VOL EVENT  ");
+            if (iLevels[ KMMAGlobalVolumeSoundIndex ] != KErrNotFound)
+            {
+                LOG1( EJavaMMAPI, EInfo, "MMA::CMMAVolumeControl::StateChanged : Post complete Val = %d ",iLevels[ KMMAGlobalVolumeSoundIndex ]);
+                iPlayer->PostLongEvent(CMMAPlayerEvent::ENOKIA_EXTERNAL_VOLUME_EVENT,
+                                       iLevels[ KMMAGlobalVolumeSoundIndex ]);
+            }
+        }
+    }
+}
+
+void CMMAVolumeControl::RefreshVolume()
+{
+    LOG( EJavaMMAPI, EInfo, "MMA::CMMAVolumeControl::RefreshVolume ++ ");
+    TRAPD(error,
+    {
+        // Get the default value for the Java sound level
+        if (iLevels[ KMMAJavaSoundIndex ] == KErrNotFound)
+        {
+            iLevels[ KMMAJavaSoundIndex ] = DoGetLevelL();
+            iLevel = CalculateLevel();
+        }
+        SetLevelL(iLevel);
+
+    });
+
+    if (error != KErrNone)
+    {
+        iPlayer->PostStringEvent(CMMAPlayerEvent::EError,
+                                 KMMAVolumeErrorMsg);
+    }
+    LOG( EJavaMMAPI, EInfo, "MMA::CMMAVolumeControl::RefreshVolume -- ");
+}
+
+void CMMAVolumeControl::RefreshControl()
+{
+    RefreshVolume();
+}
+
+EXPORT_C TInt CMMAVolumeControl::AddLevelL()
+{
+    User::LeaveIfError(iLevels.Append(KMMAVolumeMaxLevel));
+
+    // New level is the last element
+    return iLevels.Count() - 1;
+}
+
+EXPORT_C void CMMAVolumeControl::SetVolumeLevelL(TInt aLevelIndex,
+        TInt aVolumeLevel)
+{
+    LOG2( EJavaMMAPI, EInfo, "CMMAVolumeControl::SetVolumeLevelL - setting index %d, level %d",
+               aLevelIndex, aVolumeLevel);
+    if (0 >= iLevels.Count() ||  iLevels.Count() > 3)
+    {
+        return ;
+    }
+    TInt oldVolumeLevel = iLevels[ aLevelIndex ];
+    iLevels[ aLevelIndex ] = aVolumeLevel;
+    SetLevelL(CalculateLevel());
+
+    // send event if level is really changed
+    if ((aLevelIndex == KMMAJavaSoundIndex) &&
+            (aVolumeLevel != oldVolumeLevel))
+    {
+        iPlayer->PostObjectEvent(CMMAPlayerEvent::EVolumeChanged,
+                                 iControlObject);
+    }
+
+    // send event if global volume level is really changed
+    // Error ID AKUR-7G69Q5 GLOBAL VOLUME EVENT CR
+    if ((aLevelIndex == KMMAGlobalVolumeSoundIndex) &&
+            (aVolumeLevel != oldVolumeLevel))
+    {
+
+        iPlayer->PostLongEvent(CMMAPlayerEvent::ENOKIA_EXTERNAL_VOLUME_EVENT,
+                               iLevels[ aLevelIndex ]);
+    }
+}
+
+void CMMAVolumeControl::GetVolumeLevelL(TInt aLevelIndex,
+                                        TInt* aVolumeLevel)
+{
+    LOG1( EJavaMMAPI, EInfo, "CMMAVolumeControl::GetVolumeLevelL - level index %d", aLevelIndex);
+
+    // Return max volume if the default Java volume level is not yet known
+    if (aLevelIndex == KMMAJavaSoundIndex &&
+            iLevels[ KMMAJavaSoundIndex ] == KErrNotFound)
+    {
+        *aVolumeLevel = KMMAVolumeMaxLevel;
+        return;
+    }
+
+    *aVolumeLevel = iLevels[ aLevelIndex ];
+
+    LOG1( EJavaMMAPI, EInfo, "CMMAVolumeControl::GetVolumeLevelL - level %d", *aVolumeLevel);
+}
+
+TInt CMMAVolumeControl::CalculateLevel()
+{
+    TInt levelCount = iLevels.Count();
+
+    // 64 bit integer must be used to have more than 4 levels.
+    TInt64 level = KMMAVolumeMaxLevel;
+    TInt64 sum = 1;
+
+    // All levels in the array are percentage of the max volume (0..100).
+    // Actual sound level will be multiplying all levels.
+    for (TInt i = 0; i < levelCount; i++)
+    {
+        // If the level is not known it is expected to be max volume
+        level = (iLevels[ i ] == KErrNotFound ?
+                 level * KMMAVolumeMaxLevel :
+                 level * iLevels[ i ]);
+        sum *= KMMAVolumeMaxLevel;
+    }
+    return level / sum;
+}
+//  END OF FILE