1 /*

     2 * Copyright (c) 2002 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:  This class has JNI wrappers for CMMATempoControl

    15 *

    16 */

    17 

    18 #include <jutils.h>

    19 

    20 #include "com_nokia_microedition_media_control_TempoControl.h"

    21 #include "cmmaeventsource.h"

    22 #include "cmmamiditempocontrol.h"

    23 #include <jdebug.h>

    24 

    25 //

    26 // Wrapper functions which are needed in event source execution.

    27 // If method to be called can leave ExecuteTrap must be used,

    28 // otherwise Execute and ExecuteV can be used.

    29 //

    30 //

    31 

    32 /**

    33  * Local function which can be used to call CMMATempoControl class methods.

    34  * Type of of the function pointer must be

    35  * TInt CMMATempoControl::aFunc( TInt aData )

    36  *

    37  * @param aTempoControl CMMATempoControl pointer.

    38  * @param aFunc Pointer to the CMMATempoControl method.

    39  * @param aData Parameter to passed to the aFunc method

    40  * @param aReturnValue The return value of the aFunc will

    41  *                     be assigned to this parameter.

    42  */

    43 LOCAL_C void ReturnIntParamIntFuncL(CMMAMIDITempoControl* aTempoControl,

    44                                     TInt(CMMAMIDITempoControl::*aFuncL)(TInt),

    45                                     TInt aData,

    46                                     TInt* aReturnValue)

    47 {

    48     // call TInt CMMATempoControl::aFunc( TInt aData ) method.

    49     *aReturnValue = (aTempoControl->*aFuncL)(aData);

    50 }

    51 

    52 /**

    53  * Local function which can be used to call CMMATempoControl class methods.

    54  * Type of of the function pointer must be

    55  * TInt CMMATempoControl::aFunc()

    56  *

    57  * @param aTempoControl CMMATempoControl pointer.

    58  * @param aFunc Pointer to the CMMATempoControl method.

    59  * @param aReturnValue The return value of the aFunc will

    60  *                     be assigned to this parameter.

    61  */

    62 LOCAL_C void ReturnIntFuncL(CMMAMIDITempoControl* aTempoControl,

    63                             TInt(CMMAMIDITempoControl::*aFuncL)(),

    64                             TInt* aReturnValue)

    65 {

    66     // call TInt CMMATempoControl::aFunc() method.

    67     *aReturnValue = (aTempoControl->*aFuncL)();

    68 }

    69 

    70 //

    71 // JNI functions. Prototypes are generated and commented in Java class

    72 // com_nokia_microedition_media_control_TempoControl

    73 //

    74 

    75 /**

    76  * JNI function from com.nokia.microedition.media.control.TempoControl

    77  */

    78 JNIEXPORT jint JNICALL

    79 Java_com_nokia_microedition_media_control_TempoControl__1setTempo

    80 (JNIEnv*,

    81  jobject,

    82  jint aControlHandle,

    83  jint aEventSourceHandle,

    84  jint aTempo)  // parameter boundary is checked in Java side.

    85 {

    86     // Get pointer to native event source.

    87     CMMAEventSource* eventSource =

    88         JavaUnhand< CMMAEventSource >(aEventSourceHandle);

    89 

    90     CMMAMIDITempoControl* tempoControl =

    91         JavaUnhand< CMMAMIDITempoControl >(aControlHandle);

    92 

    93     // Value returned from SetTempo method will be assigned to returnValue.

    94     TInt returnValue = 0;

    95 

    96     // Setting tempo will not leave, it just assigns default

    97     // value to the returnValue variable.

    98     TInt error;

    99     error = eventSource->ExecuteTrap(&ReturnIntParamIntFuncL,

   100                                      tempoControl,

   101                                      &CMMAMIDITempoControl::SetTempoL,

   102                                      aTempo,

   103                                      &returnValue);

   104 

   105     DEBUG_INT("TempoControl__1setTempo return value %d", returnValue);

   106 

   107     return (error == KErrNone) ? returnValue : error;

   108 }

   109 

   110 /**

   111  * JNI function from com.nokia.microedition.media.control.TempoControl

   112  */

   113 JNIEXPORT jint JNICALL

   114 Java_com_nokia_microedition_media_control_TempoControl__1getTempo

   115 (JNIEnv*,

   116  jobject,

   117  jint aControlHandle,

   118  jint aEventSourceHandle)

   119 {

   120     // Get pointer to native event source.

   121     CMMAEventSource* eventSource =

   122         JavaUnhand< CMMAEventSource >(aEventSourceHandle);

   123 

   124     CMMAMIDITempoControl* tempoControl =

   125         JavaUnhand< CMMAMIDITempoControl >(aControlHandle);

   126 

   127     TInt returnValue = 0;

   128     TInt error;

   129 

   130     error = eventSource->ExecuteTrap(&ReturnIntFuncL,

   131                                      tempoControl,

   132                                      &CMMAMIDITempoControl::TempoL,

   133                                      &returnValue);

   134 

   135     DEBUG_INT("TempoControl__1getTempo return value %d", returnValue);

   136 

   137     return (error == KErrNone) ? returnValue : error;

   138 }

   139 //  END OF FILE