javauis/mmapi_qt/audiostreaming/src/cmmaaudiostreamratecontrol.cpp
changeset 23 98ccebc37403
child 26 dc7c549001d5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/mmapi_qt/audiostreaming/src/cmmaaudiostreamratecontrol.cpp	Fri May 14 15:47:24 2010 +0300
@@ -0,0 +1,114 @@
+/*
+* 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 implements RateControl for HTTP stream audio player.
+*
+*/
+
+
+//  INCLUDE FILES
+#include <logger.h>
+#include <e32base.h>
+
+#include "cmmaaudiostreamratecontrol.h"
+
+namespace
+{
+const TInt KErrorMessageSize = 32;
+_LIT(KErrDefaultError, "Symbian OS Error: %d");
+}
+
+CMMAAudioStreamRateControl* CMMAAudioStreamRateControl::NewL(CMMAAudioStreamPlayer* aPlayer)
+{
+    CMMAAudioStreamRateControl* self = new(ELeave) CMMAAudioStreamRateControl(aPlayer);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+}
+
+CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl()
+{
+    LOG( EJavaMMAPI, EInfo, "MMA:CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl");
+    if (iPlayer)
+    {
+        iPlayer->RemoveStateListener(this);
+    }
+}
+
+CMMAAudioStreamRateControl::CMMAAudioStreamRateControl(CMMAAudioStreamPlayer* aPlayer) :
+        iPlayer(aPlayer), iCurrentRate(KMMADefaultRate)
+{
+    LOG( EJavaMMAPI, EInfo, "MMA:CMMAAudioStreamRateControl::CMMAAudioStreamRateControl");
+}
+
+void CMMAAudioStreamRateControl::ConstructL()
+{
+    iPlayer->AddStateListenerL(this);
+}
+
+void CMMAAudioStreamRateControl::StateChanged(TInt aState)
+{
+    LOG( EJavaMMAPI, EInfo, "MMA:CMMAAudioStreamRateControl::StateChanged");
+    if (aState == CMMAPlayer::EStarted && iCurrentRate == KMMAMinRate)
+    {
+        // do not post event to Java or change player state
+        TInt err = iPlayer->Pause();
+        if (err != KErrNone)
+        {
+            ELOG1( EJavaMMAPI, "CMMAAudioStreamRateControl::StateChanged: Pause error %d", err);
+            TBuf<KErrorMessageSize> errorMessage;
+            errorMessage.Format(KErrDefaultError, err);
+            iPlayer->PostStringEvent(CMMAPlayerEvent::EError, errorMessage);
+        }
+    }
+}
+
+TInt CMMAAudioStreamRateControl::SetRateL(TInt aRate)
+{
+    LOG( EJavaMMAPI, EInfo, "MMA:CMMAAudioStreamRateControl::SetRateL");
+    TInt newRate;
+    if (aRate <= KMMAMinRate)
+    {
+        newRate = KMMAMinRate;
+    }
+    else
+    {
+        newRate = KMMADefaultRate;
+    }
+
+    if ((iPlayer->State() == CMMAPlayer::EStarted) &&
+            (newRate != iCurrentRate))
+    {
+        if (newRate == KMMAMinRate)
+        {
+            // do not post event to Java or change player state
+            User::LeaveIfError(iPlayer->Pause());
+        }
+        else
+        {
+            // do not post event to Java or change player state
+            iPlayer->StartL();
+        }
+    }
+    iCurrentRate = newRate;
+    return iCurrentRate;
+}
+
+TInt CMMAAudioStreamRateControl::RateL()
+{
+    return iCurrentRate;
+}
+
+
+//  END OF FILE