/*

* Copyright (c) 2010 Ixonos Plc.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "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:

* Ixonos Plc

*

* Description:  

* Transcoder observer.

*

*/

#ifndef CTRTRANSCODEROBSERVER_H

#define CTRTRANSCODEROBSERVER_H

// INCLUDES

#include <CCMRMediaSink.h>

#include "ctrcommon.h"

/**

*  Transcoder observer interface class. Every client should implement this class. 

*  @lib TRANSCODER.LIB

*  @since 3.1

*/

class MTRTranscoderObserver

    {

    public:

        /**

        * Reports initialize status to the client

        * @param aError Error status

        * @return void

        */

        virtual void MtroInitializeComplete(TInt aError) = 0;

        /**

        * Reports run-time error to the client

        * @param aError Run-time error

        * @return void

        */

        virtual void MtroFatalError(TInt aError) = 0;

        /**

        * Returns media bitstream buffer to the client

        * @param aBuffer Bitstream media buffer

        * @return void

        */

        virtual void MtroReturnCodedBuffer(CCMRMediaBuffer* aBuffer) = 0;

        /**

        * Request to the client to set FrameRate of the input sequence.

        * @param aRate Framerate of the input sequence (in frames per second)

        * @return void

        */

        virtual void MtroSetInputFrameRate(TReal& aRate) = 0;

        /**

        * Completes async request

        * @param none

        * @return void

        */

        virtual void MtroAsyncStopComplete() = 0;

        /**

        * Notifies that resources were lost and transcoding has to be suspended

        * @param none

        * @return void

        */

        virtual void MtroSuspend() = 0;

        /**

        * Notifies that resources were restored and transcoding can now continue

        * @param none

        * @return void

        */

        virtual void MtroResume() = 0;

    };

#endif