javauis/mmapi_qt/baseline/src/cmmasourcestream.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 27 May 2010 12:49:31 +0300
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Revision: v2.1.26 Kit: 2010121
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/*
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* Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Class for reading data from Java SourceStream to native side
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*
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*/
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#include <logger.h>
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#include <JniEnvWrapper.h>
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#include "mmafunctionserver.h"
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#include "cmmasourcestream.h"
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#include "cmmasourcestreamevent.h"
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#include "mmmasourcestreamlistener.h"
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const TInt KBufferSize = 4096; // data is read from java in 4k pieces
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// CONSTRUCTION
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CMMASourceStream* CMMASourceStream::NewL(JNIEnv* aJNIEnv,
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        MMMAEventPoster* aEventPoster,
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        jobject aJavaSourceStream,
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        MMMASourceStreamListener* aListener
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                                        )
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{
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    CMMASourceStream* self = CMMASourceStream::NewLC(aJNIEnv,
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                             aEventPoster,
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                             aJavaSourceStream,
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                             aListener);
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    CleanupStack::Pop();
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    return self;
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}
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CMMASourceStream* CMMASourceStream::NewLC(JNIEnv* aJNIEnv,
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        MMMAEventPoster* aEventPoster,
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        jobject aJavaSourceStream,
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        MMMASourceStreamListener* aListener
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                                         )
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{
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    CMMASourceStream* self = new(ELeave) CMMASourceStream(aEventPoster,
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            aListener);
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    CleanupStack::PushL(self);
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    self->ConstructL(aJNIEnv, aJavaSourceStream);
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    return self;
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}
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CMMASourceStream::~CMMASourceStream()
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{
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    LOG(EJavaMMAPI, EInfo, "MMA::CMMASourceStream::~");
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    delete iData;
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    delete iReadEvent;
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}
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// Default constructor
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CMMASourceStream::CMMASourceStream(MMMAEventPoster* aEventPoster,
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                                   MMMASourceStreamListener* aListener)
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        : iEventPoster(aEventPoster), iListener(aListener)
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{
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}
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void CMMASourceStream::ConstructL(JNIEnv* aJNIEnv,
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                                  jobject aJavaSourceStream)
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{
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    // JNI interface pointer can't be passed to different thread, so
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    // it is needed to get valid JNI interface pointer for Event Server thread
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    aJNIEnv = iEventPoster->getValidJniEnv();
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    jmethodID classMethodID =
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        aJNIEnv->GetMethodID(aJNIEnv->GetObjectClass(aJavaSourceStream),
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                             "read",
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                             "(II)V");
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    if (!classMethodID)
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    {
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        User::Leave(KErrNoMemory);
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    }
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    LOG(EJavaMMAPI, EInfo, "CMMASourceStream::ConstructL , jmethodId found");
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    jobject apeer =  aJNIEnv->NewGlobalRef(aJavaSourceStream);
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    iReadEvent = new(ELeave) CMMASourceStreamEvent(classMethodID,
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            apeer);
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}
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void CMMASourceStream::WriteL(const TUint8* aData,
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                              TInt aLength,
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                              TInt aState)
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{
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    LOG1(EJavaMMAPI, EInfo, "MMA::CMMASourceStream::WriteL() %d",aState);
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    if (aState < KErrNone)
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    {
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        LOG(EJavaMMAPI, EInfo, "MMA::CMMASourceStream::WriteL  : 1");
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        // Inform listener on error case
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        iListener->ReadCompletedL(aState, KNullDesC8());
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        return;
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    }
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parents:
diff changeset
   109
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diff changeset
   110
    if ((iData->Size() + aLength) > iData->Des().MaxSize())
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parents:
diff changeset
   111
    {
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   112
        // if data doesn't fit, reallocate more
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parents:
diff changeset
   113
        HBufC8* reallocated = iData->ReAlloc(iData->Des().MaxSize() + KBufferSize);
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parents:
diff changeset
   114
        if (!reallocated)  // realloc failed
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parents:
diff changeset
   115
        {
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diff changeset
   116
            // probably too much data read, so freeing used memory
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   117
            delete iData;
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   118
            iData = NULL;
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   119
            iListener->ReadCompletedL(KErrNoMemory, KNullDesC8());
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   120
            return;
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   121
        }
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   122
        iData = reallocated;
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diff changeset
   123
    }
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parents:
diff changeset
   124
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   125
    // java returns length -1 when completed
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   126
    if (aLength > 0)
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   127
    {
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   128
        iData->Des().Append(aData, aLength);
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   129
    }
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   130
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    TInt currentRead = iData->Size() - iBufferPosition;
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   132
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   133
    if ((aState == ECompleted) ||
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            (currentRead == iReadLength))
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   135
    {
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   136
        if (iReadLength == KMMAReadAllData)
98ccebc37403 Revision: v2.1.24
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parents:
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   137
        {
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   138
            iListener->ReadCompletedL(aState, *iData);
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   139
        }
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   140
        else
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parents:
diff changeset
   141
        {
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   142
            TPtrC8 data = iData->Mid(iBufferPosition, currentRead);
98ccebc37403 Revision: v2.1.24
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parents:
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   143
            iListener->ReadCompletedL(aState, data);
98ccebc37403 Revision: v2.1.24
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parents:
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   144
        }
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parents:
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   145
    }
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parents:
diff changeset
   146
    else
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   147
    {
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        // phase ready, inform the Player
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   149
        if (iReadLength == KMMAReadAllData)
98ccebc37403 Revision: v2.1.24
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parents:
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   150
        {
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parents:
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   151
            iReadEvent->SetLength(KBufferSize);
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parents:
diff changeset
   152
        }
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parents:
diff changeset
   153
        else
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   154
        {
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parents:
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   155
            iReadEvent->SetLength(iReadLength - currentRead);
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parents:
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   156
        }
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   157
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parents:
diff changeset
   158
    }
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   159
26
dc7c549001d5 Revision: v2.1.26
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parents: 23
diff changeset
   160
    LOG(EJavaMMAPI, EInfo, "MMA::CMMASourceStream::WriteL completed");
23
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parents:
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   161
}
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   162
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parents:
diff changeset
   163
void CMMASourceStream::ReadL(TInt aLength)
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   164
{
26
dc7c549001d5 Revision: v2.1.26
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parents: 23
diff changeset
   165
    LOG1(EJavaMMAPI, EInfo, "MMA::CMMASourceStream::ReadL(%d)", aLength);
23
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   166
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   167
    __ASSERT_DEBUG(iData != NULL, User::Invariant());
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parents:
diff changeset
   168
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diff changeset
   169
    PrepareReadL();
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parents:
diff changeset
   170
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   171
    iBufferPosition = iData->Size();
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parents:
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   172
    iReadLength = aLength;
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   173
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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   174
    iReadEvent->SetLength(aLength);
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   175
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parents:
diff changeset
   176
    // data has been requested, note will be sent
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parents:
diff changeset
   177
    iEventPoster->PostEvent(iReadEvent, CMMAEvent::ENotifyPriority);
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   178
}
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   179
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   180
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   181
void CMMASourceStream::ReadAllL()
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   182
{
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parents:
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   183
    // not reading again if iData already has data
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   184
    if (iData == NULL)
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   185
    {
26
dc7c549001d5 Revision: v2.1.26
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parents: 23
diff changeset
   186
        LOG(EJavaMMAPI, EInfo, "CMMASourceStream::ReadAllL: Buffer empty, reading from java");
23
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   187
        CreateDataBufferL(KBufferSize);
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   188
        ReadL(KMMAReadAllData);
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   189
    }
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   190
    else
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   191
    {
26
dc7c549001d5 Revision: v2.1.26
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parents: 23
diff changeset
   192
        LOG(EJavaMMAPI, EInfo, "CMMASourceStream::ReadAllL: Buffer not empty, ->ReadCompleteL");
23
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   193
        iListener->ReadCompletedL(ECompleted, *iData);
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   194
    }
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   195
}
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   196
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   197
void CMMASourceStream::PrepareReadL()
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   198
{
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   199
}
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   200
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   201
void CMMASourceStream::ResetData()
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   202
{
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   203
    delete iData;
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   204
    iData = NULL;
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   205
}
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   206
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   207
void CMMASourceStream::CreateDataBufferL(TInt aBufferSize)
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   208
{
26
dc7c549001d5 Revision: v2.1.26
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parents: 23
diff changeset
   209
    LOG(EJavaMMAPI, EInfo, "CMMASourceStream::CreateDataBufferL +");
23
98ccebc37403 Revision: v2.1.24
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parents:
diff changeset
   210
    __ASSERT_DEBUG(iData == NULL, User::Invariant());
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   211
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   212
    iData = HBufC8::NewL(aBufferSize);
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   213
}
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   214
98ccebc37403 Revision: v2.1.24
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   215
//  END OF FILE