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:

    15 *

    16 */

    17 

    18 

    19 package com.nokia.amms.control;

    20 

    21 import com.nokia.amms.AMMSError;

    22 

    23 public class VolumeControl extends ControlImpl

    24         implements javax.microedition.media.control.VolumeControl

    25 {

    26     private static final int MAX_VOLUME = 100;

    27     private int iLevel = MAX_VOLUME;

    28     private boolean iMuted = false;

    29 

    30     /**

    31      * Constructor

    32      */

    33     public VolumeControl()

    34     {

    35     }

    36 

    37     /**

    38      * Please refer to JSR 234 for more details.

    39      */

    40     public boolean isMuted()

    41     {

    42         checkValid();

    43         return iMuted;

    44     }

    45 

    46     /**

    47      * Please refer to JSR 234 for more details.

    48      */

    49     public int getLevel()

    50     {

    51         checkValid();

    52         return iLevel;

    53     }

    54 

    55     /**

    56      * Please refer to JSR 234 for more details.

    57      */

    58     public int setLevel(int aLevel)

    59     {

    60         checkValid();

    61         int level = aLevel;

    62 

    63         // Set level to between 0 and 100

    64         if (level < 0)

    65         {

    66             level = 0;

    67         }

    68         else if (level > MAX_VOLUME)

    69         {

    70             level = MAX_VOLUME;

    71         }

    72 

    73         if (!iMuted)

    74         {

    75             AMMSError.check(_setLevel(iEventSource,

    76                                       iControlHandle,

    77                                       level));

    78         }

    79         iLevel = level;

    80         return level;

    81     }

    82 

    83     /**

    84      * Please refer to JSR 234 for more details.

    85      */

    86     public void setMute(boolean aMuted)

    87     {

    88         checkValid();

    89 

    90         // Check if mute status is changed

    91         if (aMuted != iMuted)

    92         {

    93             iMuted = aMuted;

    94 

    95             int level = iLevel;

    96 

    97             // If mute is on set volume to 0, otherwise set to level set before

    98             if (iMuted)

    99             {

   100                 level = 0;

   101             }

   102 

   103             AMMSError.check(_setLevel(iEventSource,

   104                                       iControlHandle,

   105                                       level));

   106         }

   107     }

   108 

   109     /**

   110      * @param aEventSourceHandle Handle to native event source.

   111      * @param aControlHandle Handle to native control.

   112      * @param aLevel New volume level.

   113      */

   114     private static native int _setLevel(int aEventSourceHandle,

   115                                         int aControlHandle,

   116                                         int aLevel);

   117 }