// Copyright (c) 2007-2010 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:

// Interface class for media plug-ins

//

#ifndef __TRACECOREMEDIAPLUGIN_H__

#define __TRACECOREMEDIAPLUGIN_H__

// Include files

#include <kernel/kernel.h>

// Forward declarations

class DTraceCorePluginIf;

class TTraceMessage;

/**

 * Media plug-in base class

 */

class DTraceCoreMediaPlugin : public DBase

    {

public:

    /**

     * Constructor

     */

    IMPORT_C DTraceCoreMediaPlugin();

    /**

     * Destructor

     */

    IMPORT_C ~DTraceCoreMediaPlugin();

    /**

     * Registers this plug-in to TraceCore

     */

    IMPORT_C TInt Register();

    /**

     * Called by the plug-in to send an incoming message to TraceCore

     * 

     * @param aMsg The message that was received

     */

    IMPORT_C void MessageReceived( TTraceMessage &aMsg );

    /**

     * Merges the header and data into a single buffer

     * 

     * @param aMsg Message to be sent.

     * @param aMsgBlock The message block where data is merged

     * @return KErrNone if successful

     */

    IMPORT_C TInt MergeHeaderAndData( const TTraceMessage& aMsg, TDes8& aTarget );

    /**

     * Called by TraceCore to send a message out

     * 

     * @param aMsg The message to be sent

     */

    virtual TInt SendMessage( TTraceMessage &aMsg ) = 0;

private:

    /**

     * Unregisters this plug-in from TraceCore. Called from destructor

     */

    void Unregister();

    };

#endif // __TRACECOREMEDIAPLUGIN_H__

// End of File