1 /*

     2 * Copyright (c) 2002-2007 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 CMMAOutputStream

    15 *

    16 */

    17 

    18 

    19 #include "jutils.h"

    20 #include "com_nokia_microedition_media_protocol_OutputStreamWriter.h"

    21 #include "cmmaoutputstream.h"

    22 #include "cmmaeventsource.h"

    23 

    24 // If eventsource is already disposed, then do nothing

    25 #define CHECK_HANDLE(x, j) { if ( !( x ) || ( ( x )->Players().Count() == 0 ) ) { return ( j ); } }

    26 

    27 LOCAL_C void ReadDataL(CMMAEventSource* aEventSource,

    28                        TInt aPlayer,

    29                        CMMAOutputStream* aOutputStream,

    30                        TUint8* aOutputBuffer,

    31                        TInt* aOutputBufferSize,

    32                        TInt* aReadStatus)

    33 {

    34     if (!aEventSource->FindPlayer(aPlayer))

    35     {

    36         // Native object was already deleted

    37         User::Leave(KErrBadHandle);

    38     }

    39 

    40     aOutputStream->ReadDataL(aOutputBuffer, aOutputBufferSize, aReadStatus);

    41 }

    42 

    43 JNIEXPORT jint JNICALL Java_com_nokia_microedition_media_protocol_OutputStreamWriter__1readData

    44 (JNIEnv* aJni, jclass, jint aOutputStream, jint aEventSource,

    45  jbyteArray aOutputBuffer, jintArray aOutputBufferSize, jint aLength, jint aPlayerHandle)

    46 {

    47     CMMAEventSource* eventSource = JavaUnhand< CMMAEventSource >(aEventSource);

    48 

    49     CHECK_HANDLE(eventSource, KErrNone);

    50 

    51     CMMAOutputStream* outputStream = JavaUnhand< CMMAOutputStream >(aOutputStream);

    52 

    53     TInt readStatus;

    54     jbyte* outputBuffer = aJni->GetByteArrayElements(aOutputBuffer, NULL);

    55 

    56     // NULL is returned if there is not enough memory

    57     if (!outputBuffer)

    58     {

    59         return KErrNoMemory;

    60     }

    61 

    62     jint* outputBufferSize = aJni->GetIntArrayElements(aOutputBufferSize, NULL);

    63     if (!outputBufferSize)

    64     {

    65         // outputBuffer was already allocated

    66         aJni->ReleaseByteArrayElements(aOutputBuffer, outputBuffer, JNI_ABORT);

    67         return KErrNoMemory;

    68     }

    69 

    70     *outputBufferSize = aLength; // size of the buffer

    71 

    72     TInt err = eventSource->ExecuteTrap(ReadDataL,

    73                                         eventSource,

    74                                         aPlayerHandle,

    75                                         outputStream,

    76                                         (TUint8*) outputBuffer,

    77                                         outputBufferSize, // returns readed size

    78                                         &readStatus);

    79 

    80     aJni->ReleaseByteArrayElements(aOutputBuffer, outputBuffer, JNI_COMMIT);

    81     aJni->ReleaseIntArrayElements(aOutputBufferSize, outputBufferSize, JNI_COMMIT);

    82 

    83     if (err != KErrNone)

    84     {

    85         return err;

    86     }

    87 

    88     // Tells if there's more data available or not

    89     return readStatus;

    90 }

    91 

    92 //  END OF FILE