hxdtcvt.h

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/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxdtcvt.h,v 1.1.1.1.50.3 2004/07/09 01:45:08 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
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 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
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 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
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 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
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 * ***** END LICENSE BLOCK ***** */

#ifndef _HXDTCVT_H
#define _HXDTCVT_H

typedef _INTERFACE	IHXDataConvertSystemObject
						IHXDataConvertSystemObject;
typedef _INTERFACE	IHXDataConvert               IHXDataConvert;
typedef _INTERFACE	IHXDataConvertResponse       IHXDataConvertResponse;
typedef _INTERFACE	IHXDataRevert                IHXDataRevert;
typedef _INTERFACE	IHXDataRevertResponse        IHXDataRevertResponse;

/****************************************************************************
 * 
 *  Interface:
 * 
 *	IHXDataConvertSystemObject
 *
 *  Purpose:
 *
 *	Object that allows Controller to communicate with a specific
 *	Data Convert plugin session (similar to IHXFileSystemObject)
 *
 *  Implemented by:
 *
 *	Server side plugin.
 * 
 *  IID_IMADataConvertSystemObject:
 * 
 *	{00003900-0901-11d1-8B06-00A024406D59}
 * 
 */
DEFINE_GUID(IID_IHXDataConvertSystemObject,
    0x00003900, 0x901, 0x11d1, 0x8b, 0x6, 0x0, 0xa0, 0x24, 0x40, 0x6d, 0x59);

#undef  INTERFACE
#define INTERFACE   IHXDataConvertSystemObject

DECLARE_INTERFACE_(IHXDataConvertSystemObject, IUnknown)
{
    /*
     *	IUnknown methods
     */
    STDMETHOD(QueryInterface)		(THIS_
					REFIID riid,
					void** ppvObj) PURE;

    STDMETHOD_(ULONG32,AddRef)		(THIS) PURE;

    STDMETHOD_(ULONG32,Release)		(THIS) PURE;
    
    /*
     * IHXDataConvertSystemObject
     */
     
    /***********************************************************************
     * Method: GetDataConvertInfo
     *
     * Purpose:
     *	Returns information needed for proper instantiation of data
     *  convert plugin.  pShortName should be a short, human readable
     *  name in the form of "company-dcname".  For example:
     *  pShortName = "rn-dataconvert"
     */
    STDMETHOD(GetDataConvertInfo) (THIS_ REF(const char*) pShortName) PURE;
    
    /***********************************************************************
     * Method: InitDataConvertSystem
     *
     * Purpose:
     *	Pass in options from config file from under DataConvertMount
     *  for this specific plugin.
     */
    STDMETHOD(InitDataConvertSystem) (THIS_ IHXValues* pOptions) PURE;
    
    /***********************************************************************
     * Method: CreateDataConvert
     *
     * Purpose:
     *	Purpose:
     *	 System is requesting an IHXDataConvert object for this mount
     *   point.
     */
    STDMETHOD(CreateDataConvert) (THIS_ IUnknown** /*OUT*/ ppConvObj) PURE;
};


/****************************************************************************
 * 
 *  Interface:
 * 
 *	IHXDataConvert
 *
 *  Purpose:
 *
 *	Per connection object to handle the actual data and header
 *	conversions.
 *
 *  Implemented by:
 *
 *	Server side plugin.
 * 
 *  IID_IMADataConvert:
 * 
 *	{00003901-0901-11d1-8B06-00A024406D59}
 * 
 */
DEFINE_GUID(IID_IHXDataConvert,
    0x00003901, 0x901, 0x11d1, 0x8b, 0x6, 0x0, 0xa0, 0x24, 0x40, 0x6d, 0x59);

#undef  INTERFACE
#define INTERFACE   IHXDataConvert

DECLARE_INTERFACE_(IHXDataConvert, IUnknown)
{
    /*
     *	IUnknown methods
     */
    STDMETHOD(QueryInterface)		(THIS_
					REFIID riid,
					void** ppvObj) PURE;

    STDMETHOD_(ULONG32,AddRef)		(THIS) PURE;

    STDMETHOD_(ULONG32,Release)		(THIS) PURE;

    /*
     *  IHXDataConvert
     */
    
    /*
     * NOTE: for each of ConvertFileHeader, ConvertStreamHeader,
     *    ConvertData, you can call the appropriate done method on
     *    the response object with a result of HXR_OK and a NULL buffer
     *    and the system will use the original header/packet.  Do this
     *    if you aren't going to change things in the header/packet.
     */
    /************************************************************************
     * Method: DataConvertInit
     *
     *Purpose:
     *	Basic initialization, mainly just to pass in response object.
     */
    STDMETHOD(DataConvertInit) (THIS_ IHXDataConvertResponse* pResponse) PURE;

    /************************************************************************
     * Method: ConvertFileHeader
     *
     * Purpose:
     *	Pass in file headers for data conversion.
     */
    STDMETHOD(ConvertFileHeader) (THIS_ IHXValues* pFileHeader) PURE;
    
    /************************************************************************
     * Method: ConvertStreamHeader
     *	
     * Purpose:
     *	Pass in stream headers for data conversion.
     */
    STDMETHOD(ConvertStreamHeader) (THIS_ IHXValues* pStreamHeader) PURE;
    
    /************************************************************************
     * Method: GetConversionMimeType
     *
     * Purpose:
     *	Tell the server what converstion type you are using for the
     *	session.
     */
    STDMETHOD(GetConversionMimeType)
	(THIS_ REF(const char*) pConversionType) PURE;

    /************************************************************************
     * Method: ConvertData
     *
     * Purpose:
     *	Pass in data to be converted.
     */
    STDMETHOD(ConvertData) (THIS_ IHXPacket* pPacket) PURE;
    
    /************************************************************************
     * Method: ControlBufferReady
     *
     * Purpose:
     *  Pass in a control channel buffer sent from the IHXDataRevert
     *  on the other side (player).
     */
    STDMETHOD(ControlBufferReady) (THIS_ IHXBuffer* pBuffer) PURE;
    
    /************************************************************************
     * Method: SetMulticastTransportConverter
     *
     * Purpose:
     *  In this case the IHXDataConvert is only handling the header
     *  conversions per player and this call is handing you the data
     *  converter which is doing the data.  This will a different
     *  instance of the same object.
     */
    STDMETHOD(SetMulticastTransportConverter) (THIS_
	    IHXDataConvert* pConverter) PURE;
    
    
    /************************************************************************
     * Method: AddMulticastControlConverter
     *
     * Purpose:
     *  In this case the IHXDataConvert is only handling the data 
     *  conversions for all of the players (but only once because it's
     *  multicast).  This call is handing you one of a possible many
     *  IHXDataConvert objects which will be handling the header
     *  conversions.
     */
    STDMETHOD(AddMulticastControlConverter) (THIS_
	    IHXDataConvert* pConverter) PURE;
    
    /************************************************************************
     * Method: Done
     *
     * Purpose:
     *  Let IHXDataConvert know that it is done. This is mainly to clear
     *  circular refs between multicast transport and controllers.
     */
    STDMETHOD(Done)			(THIS) PURE;

};

/****************************************************************************
 * 
 *  Interface:
 * 
 *	IHXDataConvertResponse
 *
 *  Purpose:
 *
 *	Response object for IHXDataConvert.
 *
 *  Implemented by: