datffact.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: datffact.h,v 1.3.50.3 2004/07/09 01:44:45 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
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * 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
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * 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
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 * 
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

#ifndef _DATA_FILE_FACT_H_
#define _DATA_FILE_FACT_H_

/*
 * 
 *  Interface:
 *
 *	IHXDataFileFactory & IHXDataFile
 *
 *  Purpose:
 *
 *	This interface provides an API for creating datafile objects
 *      based on passed in options and platform compiled for.
 *
 *		IHXDataFileFactory
 *		|
 *		IHXDataFile
 *		|__________________________________________________...
 *		|		|                |                |
 *		Buffered	UnBuffered       Mem.Mapped       Async
 *
 */

#include "hxtypes.h"
#include "hxcom.h"
#include "hxdataf.h"


class HXDataFileFactory : public IHXDataFileFactory
{
public:
    					HXDataFileFactory();
    virtual 				~HXDataFileFactory();
    /*
     *  IUnknown methods
     */
    STDMETHOD(QueryInterface)		(THIS_
					REFIID riid,
					void** ppvObj);
    
    STDMETHOD_(ULONG32, AddRef)		(THIS);
    
    STDMETHOD_(ULONG32, Release)	(THIS);
    
    /*
     *  IHXDataFileFactory methods
     */

    /* Creates a datafile for buffered or unbuffered I/O
     * By default create an IHXDataFile for BUFFERED file I/O 
     * for all platforms, except SOLARIS, where UNBUFFERED 
     * file I/O is required.
     */
    STDMETHOD(CreateFile)		(THIS_
					REF(IHXDataFile*) pDataFile,
					IUnknown* pContext,
					REF(IUnknown*) pPersistantObject,
					BOOL bDisableMemoryMappedIO,
					UINT32 ulChunkSize,
					BOOL bEnableFileLocking,
					BOOL bPreferAsyncIO);

protected:
    LONG32				m_lRefCount;
};

inline
HXDataFileFactory::HXDataFileFactory()
		 : m_lRefCount(0)
{
}

inline
HXDataFileFactory::~HXDataFileFactory()
{
}

#endif /* _DATA_FILE_FACT_H_ */