eventmgr.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: eventmgr.cpp,v 1.4.8.1 2004/07/09 02:05:57 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 ***** */

#if defined(HELIX_FEATURE_EVENTMANAGER)
// include
#include "hxtypes.h"
#include "hxcom.h"
#include "hxresult.h"
#include "ihxpckts.h"
#include "hxcomm.h"
#include "hxengin.h"
#include "hxinter.h"
// pncont
#include "hxslist.h"
#include "hxmap.h"
// rmacore
#include "hxcbobj.h"
#include "eventmgr.h"
// pndebug
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE             
static const char HX_THIS_FILE[] = __FILE__;
#endif

CRendererEventManager::CRendererEventManager(IUnknown* pContext)
{
    m_lRefCount        = 0;
    m_pContext         = pContext;
    m_pScheduler       = NULL;
    m_pSinkList        = NULL;
    m_pSinkToFilterMap = NULL;
    m_pCallback        = NULL;
    m_pEventQueue      = NULL;
    m_pEventQueueMutex = NULL;
    if (m_pContext)
    {
        // AddRef the context
        m_pContext->AddRef();
        // QI for IHXCommonClassFactory
        IHXCommonClassFactory* pFactory = NULL;
        m_pContext->QueryInterface(IID_IHXCommonClassFactory,
                                   (void**) &pFactory);
        if (pFactory)
        {
            // Create a mutex
            pFactory->CreateInstance(CLSID_IHXMutex,
                                     (void**) &m_pEventQueueMutex);
        }
        HX_RELEASE(pFactory);
    }
}

CRendererEventManager::~CRendererEventManager()
{
    Close();
}

STDMETHODIMP CRendererEventManager::QueryInterface(REFIID riid, void** ppvObj)
{
    HX_RESULT retVal = HXR_OK;

    if (ppvObj)
    {
        QInterfaceList qiList[] =
            {
                { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXEventManager*)this },
                { GET_IIDHANDLE(IID_IHXEventManager), (IHXEventManager*)this },
                { GET_IIDHANDLE(IID_IHXCallback), (IHXCallback*)this },
            };
        
        retVal = ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
    }
    else
    {
        retVal = HXR_FAIL;
    }

    return retVal;
}

STDMETHODIMP_(ULONG32) CRendererEventManager::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(ULONG32) CRendererEventManager::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;

    return 0;
}

STDMETHODIMP CRendererEventManager::AddEventSink(IHXEventSink* pSink)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pSink)
    {
        // Do we have a list?
        if (!m_pSinkList)
        {
            m_pSinkList = new CHXSimpleList();
        }
        if (m_pSinkList)
        {
            // Clear the return value
            retVal = HXR_OK;
            // Make sure this sink is not already on the list
            if (!IsSinkInList(pSink))
            {
                // AddRef before we put it on the list
                pSink->AddRef();
                // Now put this sink on the tail of the list
                m_pSinkList->AddTail((void*) pSink);
                // Add an NULL entry for this sink in the map
                if (!m_pSinkToFilterMap)
                {
                    m_pSinkToFilterMap = new CHXMapPtrToPtr();
                }
                if (m_pSinkToFilterMap)
                {
                    m_pSinkToFilterMap->SetAt((void*) pSink, NULL);
                }
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRendererEventManager::RemoveEventSink(IHXEventSink* pSink)
{
    HX_RESULT retVal = HXR_OK;

    if (pSink && m_pSinkList && m_pSinkList->GetCount() > 0)
    {
        // Remove the sink's entry in the sink-to-filter map and
        // release our ref on the filter
        void* pVoid = NULL;
        if (m_pSinkToFilterMap &&
            m_pSinkToFilterMap->Lookup((void*) pSink, pVoid))
        {
            // Get the key value list
            CHXSimpleList* pList = (CHXSimpleList*) pVoid;
            // Clear this list
            ClearSinkFilterList(pList);
            // Delete the rule list
            HX_DELETE(pList);
            // Remove the entry from the sink-to-filter map
            m_pSinkToFilterMap->RemoveKey((void*) pSink);
        }
        // Run through the sink list and release
        // the list's ref on the sink
        LISTPOSITION pos = m_pSinkList->GetHeadPosition();
        while (pos)
        {
            IHXEventSink* pListSink =
                (IHXEventSink*) m_pSinkList->GetAt(pos);
            if (pListSink && pListSink == pSink)
            {
                m_pSinkList->RemoveAt(pos);
                HX_RELEASE(pListSink);
                break;
            }
            m_pSinkList->GetNext(pos);
        }
    }

    return retVal;
}

STDMETHODIMP CRendererEventManager::AddEventSinkFilterRule(IHXEventSink* pSink,
                                                           IHXValues*    pRule)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pSink && pRule && m_pSinkToFilterMap)
    {
        // Do we have an entry in the filter map? We definitely
        // should, because it was initialized when the sink
        // was added to the sink list. The entry can be NULL,
        // but there has to be an entry.
        void* pVoid = NULL;
        if (m_pSinkToFilterMap->Lookup((void*) pSink, pVoid))
        {
            // Get the filter
            CHXSimpleList* pFilter = (CHXSimpleList*) pVoid;
            // If the filter is NULL, then that means
            // we need to create the list and put it
            // back into the map
            if (!pFilter)
            {
                pFilter = new CHXSimpleList();
                if (pFilter)
                {
                    m_pSinkToFilterMap->SetAt((void*) pSink,
                                              (void*) pFilter);
                }
            }
            if (pFilter)
            {
                // Create the CEventSinkFilterRule object
                CEventSinkFilterRule* pRuleObj =
                    new CEventSinkFilterRule(pRule);
                if (pRuleObj)
                {
                    // Make sure this rule is not already in the list
                    BOOL bPresent = FALSE;
                    LISTPOSITION pos = pFilter->GetHeadPosition();
                    while (pos)
                    {
                        CEventSinkFilterRule* pListRuleObj =
                            (CEventSinkFilterRule*) pFilter->GetNext(pos);
                        if (pListRuleObj &&
                            pListRuleObj->Same(pRuleObj))
                        {
                            bPresent = TRUE;
                            break;
                        }
                    }
                    // Was the rule already present?
                    if (!bPresent)
                    {
                        // It was NOT already present, so we
                        // can append it to the list of rules
                        pFilter->AddTail((void*) pRuleObj);
                    }
                    else
                    {
                        // It was already present, so we can
                        // delete this object
                        HX_DELETE(pRuleObj);
                    }
                    // Clear the return value
                    retVal = HXR_OK;
                }
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRendererEventManager::RemoveEventSinkFilterRule(IHXEventSink* pSink,
                                                              IHXValues*    pRule)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pSink && pRule && m_pSinkToFilterMap)
    {
        // Do we have an entry in the filter map? We definitely
        // should, because it was initialized when the sink
        // was added to the sink list. The entry can be NULL,
        // but there has to be an entry.
        void* pVoid = NULL;
        if (m_pSinkToFilterMap->Lookup((void*) pSink, pVoid))
        {
            // Get the filter
            CHXSimpleList* pFilter = (CHXSimpleList*) pVoid;
            // Do we have a filter for this sink yet?
            if (pFilter)
            {
                // Create a temp CEventSinkFilterRule object
                // just so we can use CEventSinkFilterRule::Same()
                CEventSinkFilterRule* pRuleObj =
                    new CEventSinkFilterRule(pRule);
                if (pRuleObj)
                {
                    // Find this rule in the list
                    LISTPOSITION pos = pFilter->GetHeadPosition();
                    while (pos)
                    {
                        CEventSinkFilterRule* pListRuleObj =
                            (CEventSinkFilterRule*) pFilter->GetAt(pos);
                        if (pListRuleObj &&
                            pListRuleObj->Same(pRuleObj))
                        {
                            // Remove the rule from the list
                            pFilter->RemoveAt(pos);
                            // Delete the rule object
                            HX_DELETE(pListRuleObj);
                            // Jump out of the loop
                            break;
                        }
                        else
                        {
                            pFilter->GetNext(pos);
                        }
                    }
                    // Clear the return value
                    retVal = HXR_OK;
                }
                // Delete the temporary rule
                HX_DELETE(pRuleObj);
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRendererEventManager::FireEvent(IHXBuffer* pURLStr,
                                              IHXBuffer* pFragmentStr,
                                              IHXBuffer* pEventNameStr,
                                              IHXValues* pOtherValues)
{
    HX_RESULT retVal = HXR_FAIL;

    if (pURLStr && pEventNameStr)
    {
        // Do we have a scheduler interface?
        if (!m_pScheduler && m_pContext)
        {
            // QI for IHXScheduler
            m_pContext->QueryInterface(IID_IHXScheduler, (void**) &m_pScheduler);
        }
        if (m_pScheduler)
        {
            // Do we have a callback?
            if (!m_pCallback)
            {
                // Create a callback object
                m_pCallback = new CHXGenericCallback((void*)this, (fGenericCBFunc)RendererEventCallback);
                if (m_pCallback)
                {
                    m_pCallback->AddRef();
                }
            }
            if (m_pCallback)
            {
                // Create the event object
                CRendererEvent* pEvent = new CRendererEvent(pURLStr,
                                                            pFragmentStr,
                                                            pEventNameStr,
                                                            pOtherValues);
                if (pEvent)
                {
                    // Do we have an event queue?
                    if (!m_pEventQueue)
                    {
                        // Create an event queue
                        m_pEventQueue = new CHXSimpleList();
                    }
                    if (m_pEventQueue)
                    {
                        // Lock the mutex
                        if (m_pEventQueueMutex) m_pEventQueueMutex->Lock();
                        // Put the event object on the queue
                        m_pEventQueue->AddTail((void*) pEvent);
                        // If we don't already have a callback scheduled
                        // then schedule one
                        if (!m_pCallback->GetPendingCallback())
                        {
                            m_pCallback->CallbackScheduled(m_pScheduler->RelativeEnter(m_pCallback, 0));
                        }
                        // Unlock the mutex
                        if (m_pEventQueueMutex) m_pEventQueueMutex->Unlock();
                        // Clear the return value
                        retVal = HXR_OK;
                    }
                }
                if (FAILED(retVal))
                {
                    HX_DELETE(pEvent);
                }
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRendererEventManager::Func()
{