--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommscontroller/mmccdtmfpayloadformat/inc/dtmfencstatemachine.h	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,161 @@
+/*
+* Copyright (c) 2006-2008 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:    State machine for DTMF payload format encoding and sending.
+*
+*/
+
+
+
+
+#ifndef CDTMFENCSTATEMACHINE_H
+#define CDTMFENCSTATEMACHINE_H
+
+// INCLUDES
+#include <e32base.h>
+
+// DATA TYPES
+/**
+ * Eventhandling state
+ */
+enum TDTMFSendingState
+    {
+    EStateSendingIdle       = 0,
+    EStateEncodeNextDigit   = 1,
+    EStateToneOn            = 2,
+    EStateToneOff           = 3,
+    EStateSendPaused        = 4,
+    EStateSendStopped       = 5
+    };
+
+// CLASS DECLARATION
+
+/**
+ * Callback interface for state machine clients.
+ *
+ * @lib mmccdtmfplformat.dll
+ * @since Series 60 3.2
+ */
+class MDtmfEncClient
+    {
+    public:
+    
+        /**
+         * Called when it's time to handle next digit in sequence
+         * while sending DTMF string.
+         *
+         * @since   Series 60 3.2
+         */
+        virtual void EncodeNextDigitL() = 0;
+        
+        /**
+         * Does actions belonging to tone on state. Actions include
+         * DTMF event update packets sending.
+         *
+         * @since   Series 60 3.2
+         * @param   aEntryToState   Indicates is this transition to state
+         */        
+        virtual void DoToneOnActionsL( TBool aEntryToState ) = 0;
+        
+        /**
+         * Does actions belonging to tone off state.
+         *
+         * @since   Series 60 3.2
+         * @param   aEntryToState   Indicates is this transition to state
+         */        
+        virtual void DoToneOffActionsL( TBool aEntryToState ) = 0;
+    };
+
+/**
+ * State machine for dtmf payload format encoding and sending.
+ *
+ * @lib mmccdtmfplformat.dll
+ * @since Series 60 3.2
+ */
+class CDtmfEncStateMachine : public CActive
+    {
+    public:  // Constructors and destructor
+        
+        /**
+         * Two-phased constructor.
+         */
+        static CDtmfEncStateMachine* NewL( MDtmfEncClient& aClient );
+        
+        /**
+         * Destructor.
+         */
+        virtual ~CDtmfEncStateMachine();
+
+        /**
+         * Changes state to the new one if transition is acceptable.
+         *
+         * @since    Series 60 3.2
+         * @param    aNewState  New state to proceed to
+         */
+        void ChangeStateTo( TDTMFSendingState aNewState );
+        
+        /**
+         * Returns current state.
+         *
+         * @since    Series 60 3.2
+         * @return   Current state
+         */
+        TDTMFSendingState State() const;
+        
+        /**
+         * Resets the statemachine from any state.
+         *
+         * @since S60 3.2
+         */
+        void ResetStateMachine();
+
+    protected: // New functions
+
+        /**
+         * From CActive.
+         */
+        void RunL();
+
+        /**
+         * From CActive.
+         */
+        void DoCancel();
+
+        /**
+         * From CActive.
+         */
+        TInt RunError( TInt aError );
+
+    private:
+
+        /**
+         * C++ default constructor.
+         */
+        CDtmfEncStateMachine( MDtmfEncClient& aClient );
+
+    private: // Data
+
+        /**
+         * Client using state machine
+         */        
+        MDtmfEncClient& iClient;
+
+        /**
+         * Current state
+         */
+        TDTMFSendingState iState;
+    };
+
+#endif      // CDTMFENCSTATEMACHINE_H
+
+//  End of File