javauis/mmapi_qt/baseline/inc/cmmasourcestream.h
branchRCL_3
changeset 65 ae942d28ec0e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/mmapi_qt/baseline/inc/cmmasourcestream.h	Tue Aug 31 15:09:22 2010 +0300
@@ -0,0 +1,165 @@
+/*
+* Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Class for reading data from Java SourceStream to native side
+*
+*/
+
+
+#ifndef CMMASOURCESTREAM_H
+#define CMMASOURCESTREAM_H
+
+//#include <jutils.h>
+#include "mmafunctionserver.h"
+
+class CMMASourceStreamEvent;
+class MMMASourceStreamListener;
+class MMMAEventPoster;
+
+// CONSTANTS
+const TInt KMMAReadAllData = -1;
+
+//  CLASS DECLARATION
+/**
+*   Class for reading data from Java SourceStream to native side
+*
+*
+*/
+NONSHARABLE_CLASS(CMMASourceStream): public CBase
+{
+public:
+    /**
+     * Status of the source stream reader
+     */
+    enum TStatus
+    {
+        EReadAll = 1,
+        ERead = 2,
+        EMoreData = 3,
+        ECompleted = 4,
+        EClosed = 5
+    };
+
+public:     // Constructors and destructors
+    /**
+     * Object creation. Static method.
+     *
+     * @param aJNIEnv           handle to used jni environment
+     * @param aEventPoster      handle to event poster
+     * @param aJavaSourceStream handle to java SourceStream object
+     * @param aListener         Handle to source stream listener
+     *
+     * @return CMMASourceStream object
+     */
+    static CMMASourceStream* NewL(JNIEnv* aJNIEnv,
+                                  MMMAEventPoster* aEventPoster,
+                                  jobject aJavaSourceStream,
+                                  MMMASourceStreamListener* aListener);
+
+    /**
+     * The same as NewL with cleanup stack
+     * @see NewL
+     */
+    static CMMASourceStream* NewLC(JNIEnv* aJNIEnv,
+                                   MMMAEventPoster* aEventPoster,
+                                   jobject aJavaSourceStream,
+                                   MMMASourceStreamListener* aListener);
+
+    /**
+     * Deletes owned objects
+     */
+    ~CMMASourceStream(); // Destructor
+
+protected:  // Constructors and destructors
+
+    /**
+     * Set variables
+     * @param aEventPoster handle to event poster
+     * @param aListener    handle to source stream listener
+     */
+    CMMASourceStream(MMMAEventPoster* aEventPoster,
+                     MMMASourceStreamListener* aListener);
+
+    /**
+     * 2nd phase constructor
+     *
+     * @param aJNIEnv           used jni environment
+     * @param aJavaSourceStream handle to java source stream object
+     */
+    void ConstructL(JNIEnv* aJNIEnv, jobject aJavaSourceStream);
+
+public:     // New methods
+    /**
+     * Writes data to from java buffer to native side
+     *
+     * @param aData   data passed by Java side
+     * @param aLength size of passed data
+     * @param state of this class
+     */
+    virtual void WriteL(const TUint8* aData,
+                        TInt aLength, TInt aState);
+    /**
+     * Read aLength bytes from Java source stream
+     *
+     * @param aLength size of read
+     */
+    void ReadL(TInt aLength);
+
+    /**
+     * Read all data from Java source stream, clears buffer
+     */
+    void ReadAllL();
+
+    /**
+     * Reset all data
+     */
+    virtual void ResetData();
+
+    /**
+     * Creates data buffer
+     *
+     * @param aBufferSize data buffer size
+     */
+    void CreateDataBufferL(TInt aBufferSize);
+
+
+protected:  // New methods
+
+    /**
+     * Prepare whatever is necessary for reading
+     */
+    virtual void PrepareReadL();
+
+protected:
+    CMMASourceStreamEvent* iReadEvent;
+    MMMAEventPoster* iEventPoster;
+    MMMASourceStreamListener* iListener;
+
+protected:
+    /**
+     * Buffer where data from java side will be read, Owned
+     */
+    HBufC8* iData;
+
+    /**
+     * number of bytes coming from java stream, KMMAReadAllData is whole stream
+     */
+    TInt iReadLength;
+
+    /**
+     * current position
+     */
+    TInt iBufferPosition;
+};
+
+#endif // CMMASOURCESTREAM_H