/*

* Copyright (c) 2005-2006 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:  This header specifies the implementation of BT Audio Adaptation API. 

*

*/

#ifndef __BTAUDIOSTREAMINPUTADAPTATION_H__

#define __BTAUDIOSTREAMINPUTADAPTATION_H__

#include <e32base.h>

#include <e32std.h>

#include "btaudiostreaminputbase.h" 

/**

 *  This class implements the interface specified by CBTAudioStreamInputBase. 

 *

 *  This class contains the stub implementation of the CAudioStreamInputAdaptation, 

 *  that inherits from CBTAudioStreamInputBase. 

 *  

 *  To the user it seems as if he's operating with the base class, because he calls, 

 *  but in practice the class he uses is an instance of this class. 

 *

 *  @lib btaudioadaptation.lib

 *  @since S60 v3.1 

 */

NONSHARABLE_CLASS(CBTAudioStreamInputAdaptation) : public CBTAudioStreamInputBase 

    {

    public:  

    static CBTAudioStreamInputAdaptation* NewL( MBTAudioStreamObserver& aStreamObserver, MBTAudioErrorObserver& aErrorObserver );

    virtual ~CBTAudioStreamInputAdaptation();

    public: 

    /**

     * From CBTAudioStreamInputBase.

     * This method is called when the client has processed the buffer it got 

     * from the Receive method. 

     * 

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param aBuffer refers to the buffer that was received earlier in the Receive method. 

     * @return  void

     */

        IMPORT_C void BufferEmptied( const TDesC8& aBuffer );

    /**

     * From CBTAudioStreamInputBase.

     * This method is for connecting to the audio subsystem. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param void. 

     * @return a Symbian OS wide error code. 

     */

        IMPORT_C TInt Connect();

    /**

     * From CBTAudioStreamInputBase.

     * This method is for disconnecting from the audio subsystem. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param void. 

     * @return void

     */

        IMPORT_C void Disconnect();

    /**

     * From CBTAudioStreamInputBase.

     * This method is for passing the custom interfaces that are 

     * needed sometimes for configuring the hardware encoder. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param aInterfaceId specifies the id of custom interface that the client 

     *        wants to get. 

     * @return  A pointer to the requested interface. Client must cast it into a correct class. 

     */

        IMPORT_C TAny* EncoderInterface(TUid aInterfaceId);

    /**

     * From CBTAudioStreamInputBase.

     * This method is for choosing the encoder for the audio data. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param aDesiredFourCC specifies the encoder that the client wants to use. 

     * @return a Symbian OS wide error code. 

     */

        IMPORT_C TInt SetFormat(TFourCC aDesiredFourCC);

    /**

     * From CBTAudioStreamInputBase.

     * This method is for starting the recording from the audio subsystem. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param void. 

     * @return a Symbian OS wide error code. 

     */

        IMPORT_C TInt Start();

    /**

     * From CBTAudioStreamInputBase.

     * This method is for stopping the recording from the audio subsystem. 

     *

     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 

     * for detailed explanation. 

     *

     * @since S60 v3.1

     * @param void. 

     * @return a Symbian OS wide error code. 

     */

        IMPORT_C void Stop();

    private:

        CBTAudioStreamInputAdaptation(MBTAudioStreamObserver& aStreamObserver, MBTAudioErrorObserver& aErrorObserver);

        void ConstructL();

        void RunL(); 

        void DoCancel();

   }; 

#endif