/*

* Copyright (c) 2002 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 class implements MIDITempoControl functionality.

*

*/

#ifndef CMMAMIDITEMPOCONTROL_H

#define CMMAMIDITEMPOCONTROL_H

// EXTERNAL INCLUDES

#include <midiclientutility.h> // MMidiClientUtilityObserver

//  INTERNAL INCLUDES

#include "cmmaratecontrol.h" // base class

#include "mmmaplayerstatelistener.h"

// CONSTANTS

// Constant for control name. Name is used in Java side to instantiate

// Java Class which uses CMMAMIDITempoControl.

_LIT(KMIDITempoControlName, "TempoControl");

class CMMAMIDIPlayer;

//  CLASS DECLARATION

/**

*   This class implements MIDITempoControl interface.

*

*

*/

NONSHARABLE_CLASS(CMMAMIDITempoControl): public CMMARateControl,

        public MMidiClientUtilityObserver, public MMMAPlayerStateListener

{

public:

    /**

     * Creates new CMMAMIDITempoControl.

     *

     * @param aPlayer Player that plays the content.

     */

    static CMMAMIDITempoControl* NewL(CMMAMIDIPlayer* aPlayer);

    /**

     * Destructor.

     */

    ~CMMAMIDITempoControl();

protected:

    /**

     * Constructor.

     * @param aPlayer Player that plays the content.

     */

    CMMAMIDITempoControl(CMMAMIDIPlayer* aPlayer);

    /**

     * Initializes this control.

     */

    void ConstructL();

public: // From CMMAControl

    const TDesC& ClassName() const;

public: // From CMMARateControl

    /**

     * @param aRate Rate to set in "milli-percentage"..

     * @return Actual rate set.

     */

    TInt SetRateL(TInt aRate);

    /**

     * @return The current playback rate in "milli-percentage".

     */

    TInt RateL();

    /**

     * @return The maximum rate supported.

     */

    TInt MaxRateL();

    /**

     * @return The minimum rate supported.

     */

    TInt MinRateL();

public: // New methods

    /**

     * @return Tempo, if not available the default.

     */

    TInt TempoL();

    /**

     * @param aTempo Tempo to set in milli-beats per minute.

     * @return Actual Tempo set.

     */

    TInt SetTempoL(TInt aTempo);

public:   // From MMMAPlayerStateListener

    void StateChanged(TInt aState);

public: // from MMidiClientUtilityObserver

    void MmcuoStateChanged(TMidiState aOldState,TMidiState aNewState,const TTimeIntervalMicroSeconds& aTime,TInt aError);

    void MmcuoTempoChanged(TInt aMicroBeatsPerMinute);

    void MmcuoVolumeChanged(TInt aChannel,TReal32 aVolumeInDecibels);

    void MmcuoMuteChanged(TInt aChannel,TBool aMuted);

    void MmcuoSyncUpdate(const TTimeIntervalMicroSeconds& aMicroSeconds,TInt64 aMicroBeats);

    void MmcuoMetaDataEntryFound(const TInt aMetaDataEntryId,const TTimeIntervalMicroSeconds& aPosition);

    void MmcuoMipMessageReceived(const RArray<TMipMessageEntry>& aMessage);

    void MmcuoPolyphonyChanged(TInt aNewPolyphony);

    void MmcuoInstrumentChanged(TInt aChannel,TInt aBankId,TInt aInstrumentId);

private: // Data

    /**

     * Used to control MIDI playback.

     */

    CMMAMIDIPlayer* iPlayer;

    /**

     * Current tempo. Unit of the variable is milli-beat.

     * Tempo cannot be set to the midi client before the player is

     * prefetched. Thus, when the player is in REALIZED state, tempo is

     * saved to this variable and set to the client when the player is

     * prefetched.

     */

    TInt iTempo;

};

#endif // CMMAMIDITEMPOCONTROL_H