diff -r 000000000000 -r bde4ae8d615e os/mm/devsound/devsoundrefplugin/src/platsec/SoundDevice/MmfDevSoundCIMuxUtility.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/devsound/devsoundrefplugin/src/platsec/SoundDevice/MmfDevSoundCIMuxUtility.cpp	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,147 @@
+// Copyright (c) 2005-2009 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:
+//
+
+#include "MmfDevSoundCIMuxUtility.h"
+#include <mmf/plugin/mmfdevsoundcustominterface.hrh>
+#include <mmf/server/mmfdevsoundcustominterface.h>
+#include <mmf/server/mmfdevsoundcustomcommands.h>
+#include <ecom/ecom.h>
+#include <mm/mmpluginutils.h>
+
+
+CMMFDevSoundCIMuxUtility* CMMFDevSoundCIMuxUtility::NewL(MMMFDevSoundCustomInterfaceChannel* aCustomChannel)
+	{
+	CMMFDevSoundCIMuxUtility* self = new (ELeave) CMMFDevSoundCIMuxUtility(aCustomChannel);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+void CMMFDevSoundCIMuxUtility::ConstructL()
+	{
+	// nothing needed in this implementation
+	}
+
+CMMFDevSoundCIMuxUtility::~CMMFDevSoundCIMuxUtility()
+	{
+
+	}
+
+const TInt KMuxTempBufferSize = 20;
+
+// create a custom interface Mux implementation
+MMMFDevSoundCustomInterfaceMuxPlugin* CMMFDevSoundCIMuxUtility::CreateCustomInterfaceMuxL(TUid aInterfaceId)
+	{
+	// The Uid of the plugin will be the match string
+	TInt uidAsInteger = aInterfaceId.iUid;
+	TBuf8<KMuxTempBufferSize> tempBuffer;
+	tempBuffer.Num(uidAsInteger, EHex); // has value
+	TUid interfaceUid = {KUidDevSoundCustomInterfaceMux};
+	
+	TUid destructorKey;
+	MMMFDevSoundCustomInterfaceMuxPlugin* self = 
+		static_cast<MMMFDevSoundCustomInterfaceMuxPlugin*>
+		(MmPluginUtils::CreateImplementationL(interfaceUid, destructorKey, tempBuffer, KRomOnlyResolverUid));
+
+	// pass the destructor key so class can destroy itself
+	self->PassDestructorKey(destructorKey);
+	CleanupReleasePushL(*self);
+
+	// attempt to construct the plugin
+	self->CompleteConstructL(this);
+	CleanupStack::Pop(); // self
+		
+	return self;
+	}
+
+	
+// from MMMFDevSoundCustomInterfaceMux interface
+TInt CMMFDevSoundCIMuxUtility::OpenSlave(TUid aInterface, const TDesC8& aPackageBuf)
+	{
+	// 1. send openslave custom command to remote side
+	// 2. devsoundsession intercepts this custom command
+	//    and creates / opens interface
+	// open packet = command, interface, inBuff
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCIOpenSlave;
+	TPckgBuf<TUid> idBuffer(aInterface);
+	
+	return iCustomChannel->SyncCustomCommand(commandId, idBuffer, aPackageBuf, NULL);
+	}
+	
+void CMMFDevSoundCIMuxUtility::CloseSlave(TInt aHandle)
+	{
+	// 1. send closeslave custom command to remote side
+	// 2. demuxplugin removes its handle for this interface
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCICloseSlave;
+	TPckgBuf<TInt> handleBuffer(aHandle);
+	
+	iCustomChannel->SyncCustomCommand(commandId, handleBuffer, KNullDesC8, NULL);
+	}
+
+
+TInt CMMFDevSoundCIMuxUtility::SendSlaveSyncCommand(TInt aHandle, TInt aCommand, const TDesC8& aPackageBuf)
+	{
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCISendSlaveSyncCommand;
+		
+	TMMFDevSoundCustomInterfaceCommand commandPair;
+	commandPair.iCommand = aCommand;
+	commandPair.iHandle = aHandle;
+	TPckgBuf<TMMFDevSoundCustomInterfaceCommand> comBuffer(commandPair);
+	
+	return iCustomChannel->SyncCustomCommand(commandId, comBuffer, aPackageBuf, NULL);
+	}
+
+TInt CMMFDevSoundCIMuxUtility::SendSlaveSyncCommandResult(TInt aHandle, TInt aCommand, const TDesC8& aPackageBuf, TDes8& aResultBuf)
+	{
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCISendSlaveSyncCommandResult;
+		
+	TMMFDevSoundCustomInterfaceCommand commandPair;
+	commandPair.iCommand = aCommand;
+	commandPair.iHandle = aHandle;
+	TPckgBuf<TMMFDevSoundCustomInterfaceCommand> comBuffer(commandPair);
+
+	return iCustomChannel->SyncCustomCommand(commandId, comBuffer, aPackageBuf, &aResultBuf);
+	}
+
+void CMMFDevSoundCIMuxUtility::SendSlaveAsyncCommand(TMMFDevSoundCustomInterfaceCommandPackage& aComPackage, TRequestStatus& aStatus, const TDesC8& aPackageBuf)
+	{
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCISendSlaveAsyncCommand;
+	
+	// command and handle comes from client with asynchronous commands
+		
+	iCustomChannel->AsyncCustomCommand(commandId, aStatus, aComPackage, aPackageBuf, NULL);
+	}
+	
+void CMMFDevSoundCIMuxUtility::SendSlaveAsyncCommandResult(TMMFDevSoundCustomInterfaceCommandPackage& aComPackage, TRequestStatus& aStatus, const TDesC8& aPackageBuf, TDes8& aResultBuf)
+	{
+	TUid commandId(KNullUid);
+	commandId.iUid = EMMFDevSoundCustomCommandCISendSlaveAsyncCommandResult;
+		
+	// command and handle comes from client with asynchronous commands
+
+	iCustomChannel->AsyncCustomCommand(commandId, aStatus, aComPackage, aPackageBuf, &aResultBuf);
+	}
+
+CMMFDevSoundCIMuxUtility::CMMFDevSoundCIMuxUtility(MMMFDevSoundCustomInterfaceChannel* aCustomChannel)
+: iCustomChannel(aCustomChannel)
+	{
+	}
+