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vidplin.cpp：源码内容
							/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 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 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (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.  
 *  
 * 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 ***** */ 
#if defined _UNIX
int some_friggin_ctor_dtor_ism_vidplin_cpp_smp_aak_pm_don_pg_jp = 0;
#endif
#include "hxtypes.h"
#include "hxcom.h"
#ifdef HELIX_FEATURE_VIDEO_REAL
#include "rvxvideo.h"
#endif	// HELIX_FEATURE_VIDEO_REAL
#ifdef HELIX_FEATURE_VIDEO_MPEG4
#include "mp4video.h"
#endif	// HELIX_FEATURE_VIDEO_MPEG4
#ifdef HELIX_FEATURE_VIDEO_H263
#include "h263video.h"
#endif	// HELIX_FEATURE_VIDEO_H263
#include "vidplin.h"
HX_RESULT (STDAPICALLTYPE* const VideoPluginFactory::m_fpEntryArray[])(IUnknown**)={
#ifdef HELIX_FEATURE_VIDEO_REAL
    CRVXVideoRenderer::HXCreateInstance,
#endif	// HELIX_FEATURE_VIDEO_REAL
#ifdef HELIX_FEATURE_VIDEO_MPEG4
    CMP4VideoRenderer::HXCreateInstance,
#endif	// HELIX_FEATURE_VIDEO_MPEG4
#ifdef HELIX_FEATURE_VIDEO_H263
    CH263VideoRenderer::HXCreateInstance,
#endif	// HELIX_FEATURE_VIDEO_H263
    0};
HX_RESULT (STDAPICALLTYPE* const VideoPluginFactory::m_fpExitArray[])()={0};
HX_RESULT (STDAPICALLTYPE* const VideoPluginFactory::m_fpUnloadArray[])()={
#ifdef HELIX_FEATURE_VIDEO_REAL
    CRVXVideoRenderer::CanUnload,
#endif	// HELIX_FEATURE_VIDEO_REAL
#ifdef HELIX_FEATURE_VIDEO_MPEG4
    CMP4VideoRenderer::CanUnload,
#endif	// HELIX_FEATURE_VIDEO_MPEG4
#ifdef HELIX_FEATURE_VIDEO_H263
    CH263VideoRenderer::CanUnload,
#endif	// HELIX_FEATURE_VIDEO_H263
    0};
HX_RESULT (STDAPICALLTYPE* const VideoPluginFactory::m_fpUnloadArray2[])()={
#ifdef HELIX_FEATURE_VIDEO_REAL
    CRVXVideoRenderer::CanUnload2,
#endif	// HELIX_FEATURE_VIDEO_REAL
#ifdef HELIX_FEATURE_VIDEO_MPEG4
    CMP4VideoRenderer::CanUnload2,
#endif	// HELIX_FEATURE_VIDEO_MPEG4
#ifdef HELIX_FEATURE_VIDEO_H263
    CH263VideoRenderer::CanUnload2,
#endif	// HELIX_FEATURE_VIDEO_H263
    0};
/****************************************************************************
 *
 *  Function:
 *
 *  HXCreateInstance()
 *
 *  Purpose:
 *
 *  Function implemented by all plugin DLL's to create an instance of
 *  any of the objects supported by the DLL. This method is similar to
 *  Window's CoCreateInstance() in its purpose, except that it only
 *  creates objects from this plugin DLL.
 *
 *  NOTE: Aggregation is never used. Therefore and outer unknown is
 *  not passed to this function, and you do not need to code for this
 *  situation.
 *
 */
STDAPI HXCreateInstance
(
    IUnknown**  /*OUT*/ ppIUnknown
)
{
    *ppIUnknown = (IUnknown*)(IHXPlugin*)new VideoPluginFactory();
    if (*ppIUnknown)
    {
	(*ppIUnknown)->AddRef();
	return HXR_OK;
    }
    return HXR_OUTOFMEMORY;
}
/****************************************************************************
 *
 *  Function:
 *
 *  HXShutdown()
 *
 *  Purpose:
 *
 *  Function implemented by all plugin DLL's to free any *global*
 *  resources. This method is called just before the DLL is unloaded.
 *
 */
STDAPI HXShutdown()
{
    HX_RESULT (STDAPICALLTYPE * const *itterator)(void) = &(VideoPluginFactory::m_fpExitArray[0]);
    while(*itterator)
    {
	(*itterator++)();
    }
    return HXR_OK;
}
/****************************************************************************
 *
 *  Function:
 *
 *  CanUnload()
 *
 *  Purpose:
 *
 *  Function implemented by all plugin DLL's if it returns HXR_OK
 *  then the pluginhandler can unload the DLL
 *
 */
STDAPI ENTRYPOINT(CanUnload2)(void)
{
    for( int i=0; VideoPluginFactory::m_fpUnloadArray2[i]; i++ )
    {
        if( (VideoPluginFactory::m_fpUnloadArray2[i])() != HXR_OK )
        {
            return HXR_FAIL;
        }
    }
    return HXR_OK;
}
STDAPI ENTRYPOINT(CanUnload)(void)
{
    return ENTRYPOINT(CanUnload2)();
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//      VideoPluginFactory
//  Purpose:
//      Constructor. Counts the number of functions within the
//      Entry Array. Would have liked to use:
//      return (sizeof(m_fpEntryArray)/sizeof(m_fpEntryArray[0]))-1;
//      But for some strange reason the complier spits at it...
//
VideoPluginFactory::VideoPluginFactory()
{
    m_lRefCount = 0;
    for(m_usNumOfPlugins = 0;
	m_fpEntryArray[m_usNumOfPlugins];
	m_usNumOfPlugins++) {};
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//  IUnknown::QueryInterface
//  Purpose:
//  Implement this to export the interfaces supported by your
//  object.
//
STDMETHODIMP VideoPluginFactory::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
	AddRef();
	*ppvObj = (IUnknown *)this;
	return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXPluginFactory))
    {
	AddRef();
	*ppvObj = (IHXPluginFactory *)this;
	return HXR_OK;
    }
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//      VideoPluginFactory::AddRef
//  Purpose:
//      Everyone usually implements this the same... feel free to use
//      this implementation.
//
STDMETHODIMP_(ULONG32) VideoPluginFactory::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//      VideoPluginFactory::Release
//  Purpose:
//      Everyone usually implements this the same... feel free to use
//      this implementation.
//
STDMETHODIMP_(ULONG32) VideoPluginFactory::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }
    delete this;
    return 0;
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//      VideoPluginFactory::GetNumPlugins
//  Purpose:
//      Returns an int, the number of plugins in this DLL.
//
//
STDMETHODIMP_(UINT16) VideoPluginFactory::GetNumPlugins()
{
    return m_usNumOfPlugins;
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//      VideoPluginFactory::GetPlugin
//  Purpose:
//      Returns an IUnknown Reference to the specified Interface
//
//
STDMETHODIMP VideoPluginFactory::GetPlugin(UINT16 uindex, IUnknown** pPlugin)
{
    if (uindex < m_usNumOfPlugins)
    {
	return m_fpEntryArray[uindex](pPlugin);
    }
    *pPlugin=0;
    return HXR_NOINTERFACE;
}

						