diff -r 6a20128ce557 -r ebfee66fde93 mmsengine/mmscodec/inc/mmscodecdatasink.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmsengine/mmscodec/inc/mmscodecdatasink.h	Fri Jun 04 10:25:39 2010 +0100
@@ -0,0 +1,86 @@
+/*
+* Copyright (c) 2005-2007 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:   Data sink API for chunked receiving of large messages
+*
+*/
+
+
+
+#ifndef MMMSCODECDATASINK_H
+#define MMMSCODECDATASINK_H
+
+#include <e32base.h>
+
+
+/**
+ *  Defines the interface for chunked data supply
+ *
+ *  When MMS messages are sent in chunks this provides the interface
+ *  that can be called to get next encoded data chunk
+ *
+ *  @since v3.1
+ */
+class MMmsCodecDataSink
+    {
+
+public:
+
+    /**
+     * Gives the next data part to be decoded.
+     * Decoding is synchronous. When the code returns, data can be released.
+     *
+     * @since v3.1
+     * @param aBuffer flat buffer containing the data to be decoded.
+     * @param aPosition start of data to be decoded.
+     *     Decoding will start from aPosition.
+     *     At return aPosition will point to the data that has not been
+     *     decoded yet (in case data ends with an incomplete header) or
+     *     past the end of data if everything has been decoded.
+     *     The caller can discard the beginning of data up to aPosition.
+     *     If there is data left in the buffer it must be shifted to the
+     *     beginning of buffer and new data appended to the end to allow
+     *     an incomplete header to be decoded at next round.
+     * @param aLastChunk ETrue if the data chunk in the buffer is the last one.
+     * @return error code, KErrNone if decoding succeeds
+     *     If returns some other error, transaction must be cancelled.
+     */
+    virtual TInt NextDataPart(
+        CBufFlat& aBuffer,
+        TInt& aPosition,
+        TBool aLastDataChunk ) = 0;
+        
+    /**
+     * Release data sink and free any resources
+     * This function must be called after last data chunk has been processed
+     * This function must also be called if the process is terminated by an error
+     *
+     * @since v3.1
+     */
+    virtual void RelaseDataSink() = 0;    
+    
+    /**
+     * Reset data sink.
+     * Delete all attachments from current message.
+     * Reset MMS headers
+     * Start message decoding from the beginning
+     * 
+     * This function must be called if transaction is interrupted and restarted
+     *
+     * @since v3.1
+     */
+    virtual void ResetDataSink() = 0;    
+    
+    };
+
+#endif // MMMSCODECDATASINK_H