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 "mmapiutils.h"

    21 #include "com_nokia_microedition_media_protocol_OutputStreamWriter.h"

    22 #include "cmmaoutputstream.h"

    23 #include "mmafunctionserver.h"

    24 

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

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

    27 

    28 LOCAL_C void ReadDataL(MMAFunctionServer* aEventSource,

    29                        TInt aPlayer,

    30                        CMMAOutputStream* aOutputStream,

    31                        TUint8* aOutputBuffer,

    32                        TInt* aOutputBufferSize,

    33                        TInt* aReadStatus)

    34 {

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

    36     {

    37         // Native object was already deleted

    38         User::Leave(KErrBadHandle);

    39     }

    40 

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

    42 }

    43 

    44 JNIEXPORT jint JNICALL Java_com_nokia_microedition_media_protocol_OutputStreamWriter__1readData

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

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

    47 {

    48     MMAFunctionServer* eventSource = reinterpret_cast< MMAFunctionServer* >(aEventSource);

    49     CHECK_HANDLE(eventSource, KErrNone);

    50 

    51     CMMAOutputStream* outputStream = reinterpret_cast< 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