/*

 * Copyright (c) 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: Telephony Multimedia Service

 *

 */

#ifndef TMSCSDOWNLINK_H

#define TMSCSDOWNLINK_H

#include <glib.h>

#include "tmscsdevsound.h"

namespace TMS {

//

class TMSCSPDevSoundObserver;

/**

 *  Provides Downlink functionality.

 *

 */

NONSHARABLE_CLASS(TMSCSDownlink) : public TMSCSPDevSound

    {

public:

    static TMSCSDownlink* NewL(TMSCSPDevSoundObserver& aObserver);

    virtual ~TMSCSDownlink();

    /**

     * Sets volume.

     * @param aVolume Volume.

     */

    void SetVolume(gint aVolume);

    /**

     * Gets volume.

     * @return Current volume.

     */

    gint Volume();

    /**

     * Gets max volume.

     * @return Current volume.

     */

    gint MaxVolume();

    // from base class MDevSoundObserver

    /**

     * From MDevSoundObserver.

     * Indication from devsound that stream (Downlink) has been activated

     * successfully.

     */

    void BufferToBeFilled(CMMFBuffer* /*aBuffer*/);

    /**

     * From MDevSoundObserver.

     * Indication from devsound that activation of stream( Downlink)

     * failed.

     */

    void PlayError(TInt aErrorCode);

private:

    /**

     * From CSPDevSound.

     * Tries to activate the mic stream.

     */

    void DoActivateL();

protected:

    TMSCSDownlink(TMSCSPDevSoundObserver& aObserver);

    void ConstructL();

    };

} //namespace TMS

#endif // TMSCSDOWNLINK_H