// Copyright (c) 2008-2009 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:

//

#ifndef MOMXILCOMPONENTIFOBSERVER_H

#define MOMXILCOMPONENTIFOBSERVER_H

#include <e32base.h>

#include <openmax/il/khronos/v1_x/OMX_Core.h>

class CMMFBuffer;

/**

OpenMAX component interface observer class.

This is an internal interface class that encapsulates and represents the OpenMAX callback API as defined by the OpenMAX specification.

*/

class MOmxILComponentIfObserver

	{

public:

	/**

	Callback method that returns the buffer that has been filled.

	@param 	aBuffer

	 		The buffer returned by the OpenMAX component.

	@param 	aPortIndex

	 		The OpenMAX component's port index returning the buffer.

	@return	

			KErrNone, if successful; otherwise one of the other system-wide error codes. 

	*/

	virtual TInt FillBufferDone(CMMFBuffer* aBuffer, TInt aPortIndex) = 0;

	/**

	Callback method that returns the buffer that has been emptied.

	@param 	aBuffer

	 		The buffer returned by the OpenMAX component.

	@param 	aPortIndex

	 		The OpenMAX component's port index returning the buffer.

	@return	

			KErrNone, if successful; otherwise one of the other system-wide error codes. 

	*/

	virtual TInt EmptyBufferDone(const CMMFBuffer* aBuffer, TInt aPortIndex) = 0;

	/**

	Callback method used by the component to notify the client application of a particular event.

	@param 	aEvent

	 		Event the component wants to notify the application about.

	@param 	aData1

	 		The first integer event-specific parameter.

	@param 	aData2

	 		The second integer event-specific parameter.

	@param 	aExtraInfo

			A pointer to additional event-specific data the component wants to send to the application.

			The component owns the memory.

	@return	

			KErrNone, if successful; otherwise one of the other system-wide error codes. 

	*/

	virtual TInt EventHandler(OMX_EVENTTYPE aEvent, TUint32 aData1, TUint32 aData2, TAny* aExtraInfo) = 0;

	};

#endif // MOMXILCOMPONENTIFOBSERVER_H