mmserv/tms/tmscallserver/inc/tmscsdevsound.h
author hgs
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/*
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 * Copyright (c) 2009 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: Telephony Multimedia Service
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 *
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 */
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#ifndef TMSCSDEVSOUND_H
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#define TMSCSDEVSOUND_H
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#include <sounddevice.h>
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namespace TMS {
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class TMSCSPDevSoundObserver;
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/**
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 *  Wrapper for CMMFDevSound
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 *
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 */
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NONSHARABLE_CLASS(TMSCSPDevSound) : public CBase,
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                                    public MDevSoundObserver
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    {
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public:
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    /**
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     * Destructor.
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     */
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    virtual ~TMSCSPDevSound();
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    /**
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     * Activates the dev sound stream. TMSCSPDevSoundObserver methods are called
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     * when activation goes ok or fails. If the stream is already active or
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     * activating then nothing is done.
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     */
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    virtual void Activate();
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    /**
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     * Deactivates the devsound stream. If stream is not active or
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     * activation is not ongoing then nothing is done.
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     */
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    virtual void Deactivate();
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    /**
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     * Indicates that activation is ongoing,
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     * but the result of the activation is still unknown.
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     * @return ETrue - activation ongoing, EFalse - activation not ongoing.
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     */
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    TBool IsActivationOngoing() const;
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    /**
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     * Determines wether the devsound stream is active or not.
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     * @return ETrue - Stream is active, EFalse - Stream not active.
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     */
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    TBool IsActive() const;
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    CMMFDevSound& DevSound();
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    // from base class MDevSoundObserver
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void InitializeComplete(TInt aError);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void BufferToBeFilled(CMMFBuffer* aBuffer);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void PlayError(TInt aError);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void ToneFinished(TInt aError);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void BufferToBeEmptied(CMMFBuffer* aBuffer);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void RecordError(TInt aError);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void ConvertError(TInt aError);
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    /**
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     * From MDevSoundObserver
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     * Empty implementation
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     */
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    void DeviceMessage(TUid aMessageType, const TDesC8& aMsg);
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protected:
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    TMSCSPDevSound(TMSCSPDevSoundObserver& aObserver);
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    void ConstructL(TMMFState aMode, gint aAudioPreference,
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            gint aAudioPriority);
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private:
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    /**
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     * Derived class has to activate the stream here.
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     */
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    virtual void DoActivateL() = 0;
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protected:
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    TUint iStreamType;
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    /**
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     * Indication if device is activated. Derived class has to update this.
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     */
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    TBool iActive;
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    /**
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     * Indication if activation is ongoing.
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     * Derived class has to update this.
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     */
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    TBool iActivationOngoing;
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    /**
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     * Devsound instance
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     * Own.
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     */
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    CMMFDevSound* iDevSound;
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    /**
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     * Observer for successfull activation.
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     * Not own.
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     */
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    TMSCSPDevSoundObserver& iObserver;
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    };
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} //namespace TMS
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#endif // TMSCSDEVSOUND_H