hxgrpen2.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxgrpen2.cpp,v 1.5.20.1 2004/07/09 02:07:27 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 ***** */

#include "hxtypes.h"
#include "hxcom.h"
#include "hxplugn.h"
#include "hxphand.h"
#include "hxgrpen2.h"
#include "carray.h"
#include "plghand2.h"
#include "chxuuid.h"
#include "ihxpckts.h"

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif

CHXPlugin2GroupEnumerator::CHXPlugin2GroupEnumerator(
    IHXPlugin2Handler* pPlugin2Handler) :
    m_lRefCount(0)
{
    m_pPlugin2Handler = pPlugin2Handler;
    m_pPlugin2Handler->AddRef();
    m_pPlugins = NULL;
    m_nPluginCount = 0;
}

CHXPlugin2GroupEnumerator::~CHXPlugin2GroupEnumerator()
{
    HX_DELETE(m_pPlugins);
    HX_RELEASE(m_pPlugin2Handler);
}

STDMETHODIMP
CHXPlugin2GroupEnumerator::QueryInterface(REFIID riid, void**ppvObj)
{
    QInterfaceList qiList[] =
        {
            { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXPluginGroupEnumerator*)this },
            { GET_IIDHANDLE(IID_IHXPluginGroupEnumerator), (IHXPluginGroupEnumerator*)this },
            { GET_IIDHANDLE(IID_IHXPluginQuery), (IHXPluginQuery*)this },
        };
    
    return ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
}

STDMETHODIMP_(UINT32)
CHXPlugin2GroupEnumerator::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(UINT32)
CHXPlugin2GroupEnumerator::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

STDMETHODIMP
CHXPlugin2GroupEnumerator::Init(REFIID iid)
{
    HX_RESULT res = HXR_FAIL;
    INT32 nNumPlugins;

    IHXPlugin2HandlerEnumeratorInterface *pPrivateInterface = NULL;

    HX_DELETE(m_pPlugins);
    m_pPlugins = new CHXSimpleList;

    if ((HXR_OK == m_pPlugin2Handler->QueryInterface(IID_IHXPlugin2HandlerEnumeratorInterface, (void**)& pPrivateInterface)) &&
	pPrivateInterface)
    {
	pPrivateInterface->AddSupportedIID(iid);

	// 1st check to see if the REFIID is in the list of IIDs.

	if (HXR_OK == pPrivateInterface->GetNumPluginsSupporting(iid, (UINT32&)m_nPluginCount))
	{
	    nNumPlugins = m_nPluginCount;
	    for(;nNumPlugins; nNumPlugins--)
	    {
		UINT32 nIndex; 
		pPrivateInterface->GetPluginIndexSupportingIID(iid, nNumPlugins-1, nIndex);
		m_pPlugins->AddTail((void*) nIndex);
	    }

	    res = HXR_OK;
	}
    }
    HX_RELEASE(pPrivateInterface);
    return res;
}

STDMETHODIMP_(UINT32)
CHXPlugin2GroupEnumerator::GetNumOfPlugins()
{
    return m_nPluginCount;
}

STDMETHODIMP
CHXPlugin2GroupEnumerator::GetPlugin(UINT32 ulIndex, REF(IUnknown*) pPlugin)
{
    IUnknown* pInstance = NULL;

    HX_ASSERT(ulIndex < m_nPluginCount);

    LISTPOSITION pPos = m_pPlugins->FindIndex(ulIndex);
	
    ULONG32 nPluginIndex = (ULONG32)(PTR_INT)m_pPlugins->GetAt(pPos);
    
    m_pPlugin2Handler->GetInstance(nPluginIndex, pInstance);

    if(pInstance)
    {
	pPlugin = pInstance;
	return HXR_OK;
    }
    else
    {
	return HXR_NOINTERFACE;
    }
}

STDMETHODIMP
CHXPlugin2GroupEnumerator::GetNumPluginsGivenGroup(REFIID riid, 
					REF(UINT32) /*OUT*/ unNumPlugins)
{
    HX_RESULT theErr = HXR_OK;
    
    unNumPlugins = 0;

    theErr = Init(riid);

    if (!theErr)
    {
	unNumPlugins = m_nPluginCount;
    }

    return theErr;
}


STDMETHODIMP
CHXPlugin2GroupEnumerator::GetPluginInfo(REFIID riid, UINT32 unIndex, 
				REF(IHXValues*) /*OUT*/ pValues)
{
    IUnknown* pInstance = NULL;

    HX_ASSERT(unIndex < m_nPluginCount);

    LISTPOSITION pPos = m_pPlugins->FindIndex(unIndex);
	
    ULONG32 nPluginIndex = (ULONG32)(PTR_INT)m_pPlugins->GetAt(pPos);

    m_pPlugin2Handler->GetPluginInfo(nPluginIndex, pValues);

    return pValues ? HXR_OK : HXR_FAIL;
}