1 /*

     2 * Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Manipulates the panning of a Player in the stereo output mix.

    15 *

    16 */

    17 

    18 

    19 #ifndef CAMMSPANCONTROL_H

    20 #define CAMMSPANCONTROL_H

    21 

    22 //  INCLUDES

    23 #include <e32base.h>

    24 #include <mmfstandardcustomcommands.h>

    25 #include <midiclientutility.h>

    26 #include "cammscontrol.h"

    27 

    28 //EMC header

    29 #include <BalanceControl.h>

    30 #include <cmmaemcaudioplayer.h>

    31 using multimedia :: MBalanceControl;

    32 using multimedia :: KBalanceEffectControl;

    33 // CONSTANTS

    34 _LIT(KAMMSPanControl, "PanControl");

    35 

    36 // CLASS DECLARATION

    37 

    38 /**

    39 *

    40 *  Controls for the Panning effect.

    41 *  This class delegates Pan effect method calls to CBalance.

    42 *

    43 *

    44 *  @since 3.0

    45 */

    46 NONSHARABLE_CLASS(CAMMSPanControl): public CAMMSControl

    47 {

    48 public:  // Constructors and destructor

    49 

    50     /**

    51     * Two-phased constructor.

    52     * @param aPlayer Player that has this control.

    53     */

    54     static CAMMSPanControl* NewLC(CMMAPlayer* aPlayer);

    55 

    56     /**

    57     * Destructor.

    58     */

    59     ~CAMMSPanControl();

    60 

    61 public: // New functions

    62 

    63     /**

    64     * Gets the current panning set.

    65     *

    66     * @return The current balance or panning setting.

    67     */

    68     TInt PanL();

    69 

    70     /**

    71     * Sets the panning using a linear point scale with values between -100

    72     * and 100. 0 represents panning for both channels, -100 full panning to

    73     * the left and 100 full panning to the right. If the given panning

    74     * value is less than -100 or greater than 100, the panning will be set

    75     * to -100 or 100, respectively.

    76     *

    77     * @param aPan The new panning to be set.

    78     *

    79     * @return The panning that was actually set.

    80     */

    81     TInt SetPanL(TInt aPan);

    82 

    83 public: // Functions from base classes

    84     const TDesC& ClassName() const;

    85 

    86 private:

    87     /**

    88     * C++ constructor.

    89     * @param aPlayer Player that has this control.

    90     */

    91     CAMMSPanControl(CMMAPlayer* aPlayer);

    92 

    93     /**

    94      * 2nd phase constructor.

    95      */

    96     void ConstructL();

    97 

    98 

    99 private:  // Data

   100 

   101     /** Client class to access Audio Play Device functionality, owned */

   102     RMMFAudioPlayDeviceCustomCommands* iRMMFAudioPlayDeviceCustomCommands;

   103 

   104     /** CMidiClientUtility, not owned. */

   105     CMidiClientUtility* iMidiClientUtility;

   106 private:

   107     CMMAPlayer *iMMAPlayer;

   108     /**

   109     * EMC Pan Control

   110     */

   111     CMultimediaFactory* iFactory;

   112     MStreamControl* iStreamControl;

   113     MBalanceControl *iMBalanceControl;

   114 };

   115 

   116 #endif // CAMMSPANCONTROL_H

   117 

   118