--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/amms_qt/mmacontrol/src/cammsdistanceattenuationcontrol.cpp	Fri May 14 15:47:24 2010 +0300
@@ -0,0 +1,165 @@
+/*
+* Copyright (c) 2005-2007 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:  Controls how the sound is attenuated with its distance.
+*
+*/
+
+
+
+// INCLUDE FILES
+#include <logger.h>
+#include "cammsdistanceattenuationcontrol.h"
+
+// CONSTANTS
+namespace
+{
+const TInt KAMMSRoomRollOffFactor = 0; // The logical default value set to 0
+// Rolloff factor 1000 in AMMS is 100 in Effect API
+const TInt KAMMSRolloffDivider = 10;
+
+#ifdef _DEBUG
+const TInt KAMMSMinDistance = 1;
+const TInt KAMMSMinRollofFactor = 0;
+#endif // _DEBUG
+}
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CAMMSDistanceAttenuationControl::NewLC
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+CAMMSDistanceAttenuationControl* CAMMSDistanceAttenuationControl::NewLC(
+    CMMAPlayer* aPlayer)
+{
+    CAMMSDistanceAttenuationControl* self =
+        new(ELeave)CAMMSDistanceAttenuationControl(aPlayer);
+
+    CleanupStack::PushL(self);
+
+    return self;
+}
+
+// Destructor
+CAMMSDistanceAttenuationControl::~CAMMSDistanceAttenuationControl()
+{
+    LOG( EJavaAMMS, EInfo, "AMMS::CAMMSDistanceAttenuationControl::~CAMMSDistanceAttenuationControl");
+
+    // Perform DeallocateControl, if the state change has not yet performed it.
+    DeallocateControl();
+    delete iDistanceAttenuation;
+}
+
+// -----------------------------------------------------------------------------
+// CAMMSDistanceAttenuationControl::SetParametersL
+// Sets all the 3D audio distance attenuation parameters simultaneously.
+// -----------------------------------------------------------------------------
+//
+void CAMMSDistanceAttenuationControl::SetParametersL(
+    TInt aMinDistance,
+    TInt aMaxDistance,
+    TBool aMuteAfterMax,
+    TInt aRolloffFactor)
+{
+    // Check in debug build that parameters are within valid range.
+    __ASSERT_DEBUG(
+        (aMaxDistance > aMinDistance) &&
+        (aMinDistance >= KAMMSMinDistance) &&
+        (aMaxDistance >= KAMMSMinDistance) &&
+        (aRolloffFactor >= KAMMSMinRollofFactor),
+        User::Invariant());
+
+    // NOTE: Effect API uses hundreths (100 corresponds to 1.00),
+    // but JSR234 uses thousandths (1000 represents a rolloff factor of 1.0)
+    //
+    LOG4( EJavaMMAPI, EInfo, "AMMS::CAMMSDistanceAttenuationControl::SetParametersL %d, %d, %d, %d",
+               aMinDistance, aMaxDistance, aMuteAfterMax, aRolloffFactor);
+
+    TInt convertedRolloffFactor = aRolloffFactor / KAMMSRolloffDivider;
+
+    iDistanceAttenuation->SetDistanceAttenuationL(aMinDistance, aMaxDistance,
+            aMuteAfterMax, convertedRolloffFactor, KAMMSRoomRollOffFactor);
+
+    // Apply updated settings to Effect API.
+    iDistanceAttenuation->ApplyL();
+}
+
+// -----------------------------------------------------------------------------
+// CAMMSDistanceAttenuationControl::PrepareControlL
+// Function which is called after the correct state is set in Player.
+// -----------------------------------------------------------------------------
+//
+void CAMMSDistanceAttenuationControl::PrepareControlL()
+{
+    // Perform the action only for the first time, skip if called afterwards
+    if (!iDistanceAttenuation)
+    {
+        LOG( EJavaAMMS, EInfo, "AMMS::CAMMSDistanceAttenuationControl::PrepareControlL");
+
+        CCustomCommandUtility* customCommandUtility =
+            CreateCustomCommandUtilityL();
+
+        // Effect API takes the ownership of customCommandUtility.
+        iDistanceAttenuation = CDistanceAttenuation::NewL(
+                                   customCommandUtility);
+
+        // Enable the Effect API Control
+        iDistanceAttenuation->EnableL();
+    }
+}
+
+// -----------------------------------------------------------------------------
+// CAMMSDistanceAttenuationControl::DeallocateControl
+// Function which is called after the correct state is set in Player.
+// -----------------------------------------------------------------------------
+//
+void CAMMSDistanceAttenuationControl::DeallocateControl()
+{
+    if (iDistanceAttenuation)
+    {
+        LOG( EJavaAMMS, EInfo, "AMMS::CAMMSDistanceAttenuationControl::DeallocateControl");
+
+        // Disable the Effect API Control
+        TRAPD(err, iDistanceAttenuation->DisableL());
+        if (err != KErrNone)
+        {
+            // The only even theoritically possible error code here would be
+            // KErrAccessDenied which is a result from Effect API calling ApplyL
+            // method without having update rights, but since the Effect
+            // is already created, that situation can be discarded here.
+        }
+
+        // Delete the Effect API class (it deletes CustomCommandUtility)
+        delete iDistanceAttenuation;
+        iDistanceAttenuation = NULL;
+    }
+}
+
+const TDesC& CAMMSDistanceAttenuationControl::ClassName() const
+{
+    return KAMMSDistanceAttenuationControl;
+}
+
+// -----------------------------------------------------------------------------
+// CAMMSDistanceAttenuationControl::CAMMSDistanceAttenuationControl
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+CAMMSDistanceAttenuationControl::CAMMSDistanceAttenuationControl(
+    CMMAPlayer* aPlayer)
+        : CAMMSBaseDistanceAttenuationControl(aPlayer)
+{
+}
+
+//  End of File