javauis/mmapi_qt/audiostreaming/inc.emc/cmmastreamrequest.h
changeset 23 98ccebc37403
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/mmapi_qt/audiostreaming/inc.emc/cmmastreamrequest.h	Fri May 14 15:47:24 2010 +0300
@@ -0,0 +1,94 @@
+/*
+* Copyright (c) 2002 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:  Request used to write or read data
+*
+*/
+
+#ifndef CMMASTREAMREQUEST_H
+#define CMMASTREAMREQUEST_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "mmmastreamrequestlistener.h"
+
+// CONSTANTS
+const TInt KMMAStreamRequestBufferSize = 5120;
+
+/**
+ * - If IsActive returns ETrue, data is procedded in the server.
+ * - If IsActive returns EFalse and DataPtr is empty request is
+ *   ready for reuse
+ * - If IsActive returns EFalse and DataPtr is not empty request
+ *   is waiting to be written.
+ */
+class CMMAStreamRequest: public CBase
+{
+public:// Constructor and destructor
+    /**
+     * @param aListener will be informed when request completes
+     */
+    static CMMAStreamRequest* NewLC(MMMAStreamRequestListener* aListener);
+
+    /**
+     * Destructor
+     */
+    ~CMMAStreamRequest();
+
+public: // new methods
+    /**
+     * @return TPtr to request's data
+     */
+    TPtr8& DataPtr();
+
+    /**
+     * Completes read request.
+     * @param aError system error code
+     */
+    void CompleteRead(TInt aError);
+
+    /**
+     * MMMAStreamRequestListener will be informed when request is ready.
+     */
+    void SetActive(TBool iActive);
+    TBool IsActive();
+
+    /**
+     * 1 if this is stream's last buffer
+     * @return reference to request buffer
+     */
+    TPckgBuf< TInt >& RequestBuffer();
+public:
+    void WriteRequestComplete(TInt Err);
+
+private: // Constructor
+    CMMAStreamRequest(MMMAStreamRequestListener* aListener);
+    void ConstructL();
+private: // Data
+    // will be informed when request is complete
+    MMMAStreamRequestListener* iListener;
+
+    // owned data
+    HBufC8* iData;
+
+    // ptr to iData or NULL if data is processed.
+    TPtr8 iDataPtr;
+
+    // Request buffer
+    TPckgBuf< TInt > iRequestBuffer;
+
+    // Status of the buffer
+    TBool iActive;
+};
+
+#endif // CMMASTREAMREQUEST_H