btaudioadaptation_stub/inc/btaudiostreaminputadaptation.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 14 Jan 2010 07:14:53 +0200
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/*
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* Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This header specifies the implementation of BT Audio Adaptation API. 
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*
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*/
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#ifndef __BTAUDIOSTREAMINPUTADAPTATION_H__
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#define __BTAUDIOSTREAMINPUTADAPTATION_H__
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#include <e32base.h>
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#include <e32std.h>
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#include "btaudiostreaminputbase.h" 
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/**
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 *  This class implements the interface specified by CBTAudioStreamInputBase. 
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 *
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 *  This class contains the stub implementation of the CAudioStreamInputAdaptation, 
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 *  that inherits from CBTAudioStreamInputBase. 
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 *  
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 *  To the user it seems as if he's operating with the base class, because he calls, 
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 *  but in practice the class he uses is an instance of this class. 
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 *
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 *  @lib btaudioadaptation.lib
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 *  @since S60 v3.1 
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 */
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NONSHARABLE_CLASS(CBTAudioStreamInputAdaptation) : public CBTAudioStreamInputBase 
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    {
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    public:  
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    static CBTAudioStreamInputAdaptation* NewL( MBTAudioStreamObserver& aStreamObserver, MBTAudioErrorObserver& aErrorObserver );
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    virtual ~CBTAudioStreamInputAdaptation();
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    public: 
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is called when the client has processed the buffer it got 
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     * from the Receive method. 
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     * 
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param aBuffer refers to the buffer that was received earlier in the Receive method. 
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     * @return  void
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     */
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        IMPORT_C void BufferEmptied( const TDesC8& aBuffer );
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for connecting to the audio subsystem. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param void. 
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     * @return a Symbian OS wide error code. 
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     */
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        IMPORT_C TInt Connect();
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for disconnecting from the audio subsystem. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param void. 
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     * @return void
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     */
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        IMPORT_C void Disconnect();
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for passing the custom interfaces that are 
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     * needed sometimes for configuring the hardware encoder. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param aInterfaceId specifies the id of custom interface that the client 
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     *        wants to get. 
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     * @return  A pointer to the requested interface. Client must cast it into a correct class. 
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     */
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        IMPORT_C TAny* EncoderInterface(TUid aInterfaceId);
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for choosing the encoder for the audio data. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param aDesiredFourCC specifies the encoder that the client wants to use. 
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     * @return a Symbian OS wide error code. 
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     */
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        IMPORT_C TInt SetFormat(TFourCC aDesiredFourCC);
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for starting the recording from the audio subsystem. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param void. 
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     * @return a Symbian OS wide error code. 
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     */
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        IMPORT_C TInt Start();
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    /**
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     * From CBTAudioStreamInputBase.
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     * This method is for stopping the recording from the audio subsystem. 
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     *
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     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
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     * for detailed explanation. 
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     *
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     * @since S60 v3.1
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     * @param void. 
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     * @return a Symbian OS wide error code. 
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     */
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        IMPORT_C void Stop();
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    private:
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        CBTAudioStreamInputAdaptation(MBTAudioStreamObserver& aStreamObserver, MBTAudioErrorObserver& aErrorObserver);
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        void ConstructL();
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        void RunL(); 
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        void DoCancel();
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   }; 
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#endif