stream_desc_hlpr.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** 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 ***** */ 

#include "stream_desc_hlpr.h"

#include "hxplugn.h"

IHXStreamDescription* 
HXStreamDescriptionHelper::GetInstance(IUnknown* pContext, 
				       const char* pMimeType)
{
    IHXStreamDescription*  pSD		    = 0;
    IHXPlugin2Handler*	    pPlugin2Handler = NULL;
    const char*		    pFindMimeType   = pMimeType;
    IUnknown*		    pInstance	    = NULL;

    pContext->QueryInterface(IID_IHXPlugin2Handler, (void**)&pPlugin2Handler );

    if(pPlugin2Handler)
    {
	if (HXR_OK == pPlugin2Handler->FindPluginUsingStrings(PLUGIN_CLASS,
							      PLUGIN_STREAM_DESC_TYPE,
							      PLUGIN_STREAMDESCRIPTION,
							      (char*)pFindMimeType,
							      NULL,
							      NULL,
							      pInstance))
	{
	    HX_RESULT rc;
	    rc = pInstance->QueryInterface(IID_IHXStreamDescription,
					   (void**)&pSD);
	    if(rc == HXR_OK)
	    {
		IHXPlugin* pSDPlugin = 0;
		rc = pSD->QueryInterface(IID_IHXPlugin,
					 (void**)&pSDPlugin);
		if(rc == HXR_OK)
		{
		    pSDPlugin->InitPlugin(pContext);
		    pSDPlugin->Release();
		}
	    }
	    pInstance->Release();
	}
	HX_RELEASE(pPlugin2Handler);
    }

    return pSD;

}