plghand2.cpp

linux下的一款播放器

#if !defined(HELIX_CONFIG_NOSTATICS)
    /* Check to see if we wish to use the 'faster' prefs.
     * This means using VERY long strings to store the
     * plugin information. Windows supports this but
     * discourages the practice.
     */
    IHXBuffer* pBuffer = NULL;
    if (m_pPreferences)
    {
        if (ReadPrefBOOL(m_pPreferences, "UseFasterPref", zm_bFasterPrefs) != HXR_OK)
        {
#if !defined (_WINCE)
            zm_bFasterPrefs = TRUE;
#else
            zm_bFasterPrefs = FALSE;
#endif
        }

    }
#endif /* #if !defined(HELIX_CONFIG_NOSTATICS) */
#endif /* HELIX_FEATURE_PREFERENCES */

    return HXR_OK;
}

STDMETHODIMP
Plugin2Handler::AddPluginMountPoint( const char* pName, UINT32 majorVersion, UINT32 minorVersion, IHXBuffer* pPath )
{
    HX_LOG_BLOCK( "Plugin2Handler::AddPluginMountPoint" );

    const char* pMPKey = pName ? pName : (const char*) pPath->GetBuffer();

    // Make sure this mount point is in the list
    PluginMountPoint* pMountPoint = NULL;
    if( !m_MountPoints.Lookup( pMPKey, (void*&) pMountPoint ) )
    {
	// Create new mount point
	pMountPoint = new PluginMountPoint( this, pName, majorVersion, minorVersion, pPath );
	pMountPoint->AddRef();

	// Put new mount point in list
	m_MountPoints.SetAt( pMPKey, pMountPoint );
    }

    // Increment client count
    pMountPoint->AddClient();

    // Load information from registry, and sync DLLs that aren't up to date
    return RefreshPluginInfo( pMountPoint );
}


STDMETHODIMP
Plugin2Handler::RefreshPluginMountPoint( const char* pName )
{
    HX_RESULT result = HXR_FAIL;

    // If this mount point is in the list, refresh it
    PluginMountPoint* pMountPoint = NULL;
    if( m_MountPoints.Lookup( pName, (void*&) pMountPoint ) )
    {
	result = RefreshPluginInfo( pMountPoint );
    }

    return result;
}


STDMETHODIMP
Plugin2Handler::RemovePluginMountPoint( const char* pName )
{
    HX_RESULT result = HXR_FAIL;

    // Make sure this is a valid mount point
    PluginMountPoint* pMountPoint = NULL;
    if( m_MountPoints.Lookup( pName, (void*&) pMountPoint ) )
    {
	// If this was the last client, do the clean up stuff
	if( !pMountPoint->RemoveClient() )
	{
	    // Clean up plugins
	    if( m_PluginList.GetCount() )
	    {
		LISTPOSITION listPos = m_PluginList.GetHeadPosition();
		while( listPos )
		{
		    // Save off current position for delete
		    LISTPOSITION posAt = listPos;

		    // Get current item, and increment position
		    Plugin2Handler::Plugin* pPlugin = (Plugin2Handler::Plugin*) m_PluginList.GetNext( listPos );

		    // If this plugin belongs to the mountpoint, remove it.
		    if( pPlugin && ( pPlugin->GetDLL()->GetMountPoint() == pMountPoint ) )
		    {
			// Remove plugin from indices
			RemovePluginFromIndices( pPlugin );

			// Delete from the saved position
			m_PluginList.RemoveAt( posAt );
			HX_RELEASE( pPlugin );
		    }
		}
	    }

	    // Clean up dlls
	    if (m_PluginDLLList.GetCount())
	    {
		LISTPOSITION listPos = m_PluginDLLList.GetHeadPosition();
		while( listPos )
		{
		    // Save off current position for delete
		    LISTPOSITION posAt = listPos;

		    // Get current item, and increment position
		    Plugin2Handler::PluginDLL* pPluginDLL = (Plugin2Handler::PluginDLL*) m_PluginDLLList.GetNext( listPos );

		    // If this plugin belongs to the mountpoint, remove it.
		    if( pPluginDLL && ( pPluginDLL->GetMountPoint() == pMountPoint ) )
		    {
			// Remove from filename map
			IHXBuffer* pBuffer = pPluginDLL->GetFileName();
			m_FileNameMap.RemoveKey( (char*) pBuffer->GetBuffer() );
			HX_RELEASE( pBuffer );

			// Remove from the LRU
			RemoveFromLRU(pPluginDLL);

			// Delete from the saved position
			m_PluginDLLList.RemoveAt( posAt );
			HX_RELEASE( pPluginDLL );

		    }
		}
	    }

	    // Clean up OtherDLL
	    if (m_MiscDLLList.GetCount())
	    {
		LISTPOSITION listPos = m_MiscDLLList.GetHeadPosition();
		while( listPos )
		{
		    // Save off current position for delete
		    LISTPOSITION posAt = listPos;

		    // Get current item, and increment position
		    Plugin2Handler::OtherDLL* pOtherDLL = (Plugin2Handler::OtherDLL*) m_MiscDLLList.GetNext( listPos );

		    // If this plugin belongs to the mountpoint, remove it.
		    if( pOtherDLL && ( pOtherDLL->m_pMountPoint == pMountPoint ) )
		    {
			// Delete from the saved position
			m_MiscDLLList.RemoveAt( posAt );
			HX_DELETE( pOtherDLL );
		    }
		}
	    }

	    // Clean up supported GUIDs
	    if (m_GUIDtoSupportList.GetCount())
	    {
		CHXMapStringToOb::Iterator k;

		for(k = m_GUIDtoSupportList.Begin(); k!=m_GUIDtoSupportList.End(); ++k)
		{
		    CHXSimpleList* pSupportedList = (CHXSimpleList*) *k;

		    LISTPOSITION listPos = pSupportedList->GetHeadPosition();
		    while( listPos )
		    {
			// Save off current position for delete
			LISTPOSITION posAt = listPos;

			// Get current item, and increment position
			PluginSupportingGUID* pSupportItem = (PluginSupportingGUID*) pSupportedList->GetNext( listPos );

			// If this plugin belongs to the mountpoint, remove it.
			if( pSupportItem && ( pSupportItem->m_pMountPoint == pMountPoint ) )
			{
			    // Delete from the saved position
			    pSupportedList->RemoveAt( posAt );
			    HX_DELETE( pSupportItem );
			}
		    }

		    // XXXND Remove the list from m_GUIDtoSupportList if it's empty
		}
	    }


	    // Remove mount point from list
	    m_MountPoints.RemoveKey( pName );
            if (pMountPoint)
            {
                pMountPoint->Release();
                pMountPoint = NULL;
            }
	}
    }

    return result;
}


STDMETHODIMP
Plugin2Handler::FindImplementationFromClassID( REFGUID GUIDClassID, REF(IUnknown*) pIUnknownInstance,
						IUnknown* pIUnkOuter, IUnknown* pContext )
{
    // Look though the Component plugins
    HX_RESULT result = HXR_FAIL;

    if( FAILED( result = CreatePluginViaIndex( PLUGIN_COMPONENT_CLSID, &GUIDClassID, &pIUnknownInstance, pIUnkOuter ) ) )
    {
	// XXXND FIX Try doing a manual lookup (FindPluginUsingValues)

	// Couldn't find it with the new method, try the old one.
	result = FindImplementationFromClassIDInternal( GUIDClassID, pIUnknownInstance, pContext );
    }

    return result;
}


STDMETHODIMP
Plugin2Handler::FindCLSIDFromName( const char* pName, REF(IHXBuffer*) pCLSID )
{
    HX_SETUP_CHECKPOINTLIST( "Plugin2Handler::FindCLSIDFromName()" );
    HX_PRIME_ACCUMULATOR( 'idfn', "Looking up CLSID from name" );
    HX_ACCUMULATE( 'idfc', "Number of CLSIDs looked up", 1 );

    // Initialize out params
    pCLSID = NULL;

    HX_RESULT result = HXR_FAIL;

    IHXValues* pIValues = NULL;
    if( SUCCEEDED( FindPluginInfoViaIndex( PLUGIN_COMPONENT_NAME, (char*) pName, &pIValues ) ) )
    {
	pIValues->GetPropertyBuffer( PLUGIN_COMPONENT_CLSID, pCLSID );
	HX_RELEASE( pIValues );

	result = HXR_OK;
    }
    else
    {
	// XXXND  FIX  Try using FindPluginUsingString
    }

    HX_UPDATE_ACCUMULATOR( 'idfn' );

    return result;
}


STDMETHODIMP
Plugin2Handler::FindGroupOfPluginsUsingValues( IHXValues* pValues,
				REF(IHXPluginSearchEnumerator*) pIEnumerator)
{
    // Initialize out params
    pIEnumerator = NULL;

    // Use the internal function to build up an enumerator object
    CPluginEnumerator* pEnumerator = NULL;
    HX_RESULT result = FindGroupOfPluginsUsingValues( pValues, pEnumerator );

    // If we have our enumerator, get the appropriate interface
    if( SUCCEEDED( result ) )
    {
	result = pEnumerator->QueryInterface( IID_IHXPluginSearchEnumerator,
						(void**) &pIEnumerator );
    }

    return result;
}

STDMETHODIMP
Plugin2Handler::FindGroupOfPluginsUsingStrings( char* PropName1, char* PropVal1,
				char* PropName2, char* PropVal2,
				char* PropName3, char* PropVal3,
				REF(IHXPluginSearchEnumerator*) pIEnumerator)
{
    // Initialize out params
    pIEnumerator = NULL;

    // Use the internal function to build up an enumerator object
    CPluginEnumerator* pEnumerator = NULL;
    HX_RESULT result = FindGroupOfPluginsUsingStrings( PropName1, PropVal1,
			    PropName2, PropVal2, PropName3, PropVal3, pEnumerator );

    // If we have our enumerator, get the appropriate interface
    if( SUCCEEDED( result ) )
    {
	result = pEnumerator->QueryInterface( IID_IHXPluginSearchEnumerator,
						(void**) &pIEnumerator );
    }

    return result;
}


void Plugin2Handler::ReportError( UINT8 severity, const char* pDLLName, const char* pDesc )
{
    if (m_pErrorMessages)
    {
        int nErrorTempLength;
	char *pErrorTemp;

        nErrorTempLength = strlen(pDLLName) + strlen(pDesc) + 2;

        pErrorTemp = new char[nErrorTempLength];

        if(pErrorTemp)
        {
            SafeSprintf(pErrorTemp, nErrorTempLength, "%s %s", pDLLName, pDesc );
            m_pErrorMessages->Report( severity, 0, 0, pErrorTemp, NULL );

            delete [] pErrorTemp;
        }
        else
        {
            m_pErrorMessages->Report( HXLOG_ERR, HXR_OUTOFMEMORY, 0, NULL, NULL );
        }
    }
}


STDMETHODIMP
Plugin2Handler::FindPluginUsingValues( IHXValues* pCriteria,
					REF(IUnknown*) pIUnkResult,
					IUnknown* pIUnkOuter )
{
    HX_SETUP_CHECKPOINTLIST( "Plugin2Handler::FindPluginUsingValues()" );
    HX_PRIME_ACCUMULATOR( 'fpuv', "Plugin lookup with IHXValues" );

    // Initialize out params
    pIUnkResult = NULL;

    CHXSimpleList   PossibleValues;
    IHXValues*	    pPluginValues = NULL;
    IHXBuffer*	    pBuffer = NULL;
    CHXSimpleList::Iterator i = m_PluginList.Begin();

    for(; i!= m_PluginList.End(); ++i)
    {
	Plugin2Handler::Plugin* pPlugin = (Plugin2Handler::Plugin*) *i;
	if (pPlugin->DoesMatch(pCriteria))
	{
	    PossibleValues.AddTail(pPlugin);
	}
    }

    HX_UPDATE_ACCUMULATOR( 'fpuv' );

    if (PossibleValues.Begin() == PossibleValues.End())
    {
	pIUnkResult = 0;
	return HXR_FAIL;
    }

    /****************************************************************
    ** Presently when we arrive at this spot with more than one
    ** plugin which matches the search criteria, we simply take
    ** the first one found. If this is not satisfactory then
    ** some method can be added which will process the list based
    ** upon some criteria.
    ****************************************************************/

    // if there are multiple plugins found, we will pick the one whose
    // plugin description contains "RealNetworks"
    if (PossibleValues.GetCount() > 1)
    {
	for(i = PossibleValues.Begin(); i!= PossibleValues.End(); ++i)
	{
	    Plugin2Handler::Plugin* pPlugin = (Plugin2Handler::Plugin*) *i;
	    if (HXR_OK == pPlugin->GetPluginInfo(pPluginValues) && pPluginValues)
	    {
		if (HXR_OK == pPluginValues->GetPropertyCString(PLUGIN_DESCRIPTION2, pBuffer) &&
		    pBuffer)
		{
		    if (strstr((const char*)pBuffer->GetBuffer(), "RealNetworks"))
		    {
			HX_RELEASE(pBuffer);
			if ( NO_ERRORS == pPlugin->GetInstance( pIUnkResult, pIUnkOuter ))
			{
			    return HXR_OK;
			}
			else
			{
			    return HXR_FAIL;
			}
		    }
		}
		HX_RELEASE(pBuffer);
	    }
	}
    }

    Plugin2Handler::Plugin* pPlug = (Plugin2Handler::Plugin*) *(PossibleValues.Begin());
    Errors retVal = pPlug->GetInstance( pIUnkResult, pIUnkOuter );

    return ( retVal == NO_ERRORS ) ? HXR_OK : HXR_FAIL;
}


STDMETHODIMP
Plugin2Handler::FindPluginUsingStrings( char* PropName1, char* PropVal1,
					char* PropName2, char* PropVal2,
					char* PropName3, char* PropVal3,
					REF(IUnknown*) pIUnkResult,
					IUnknown* pIUnkOuter )
{
    // Initialize out params
    pIUnkResult = NULL;

    // PropName and PropVal have to to valid tuple
    if ((PropName1 && !PropVal1)    ||
	(PropName2 && !PropVal2)    ||
	(PropName3 && !PropVal3)    ||
	(!PropName1 && PropVal1)    ||
	(!PropName2 && PropVal2)    ||
	(!PropName3 && PropVal3))
	return HXR_FAIL;

    IHXValues* pValues;
    HX_RESULT   retVal = HXR_FAIL;

    CHXHeader* pHeader = new CHXHeader();
    pHeader->QueryInterface(IID_IHXValues,  (void**)&pValues);
    AddToValues(pValues, PropName1, PropVal1, eString);
    AddToValues(pValues, PropName2, PropVal2, eString);
    AddToValues(pValues, PropName3, PropVal3, eString);
    retVal = FindPluginUsingValues( pValues, pIUnkResult, pIUnkOuter );
    pValues->Release();
    return retVal;
}


STDMETHODIMP
Plugin2Handler::GetPlugin( ULONG32 ulIndex, REF(IUnknown*) pIUnkResult,
					    IUnknown* pIUnkOuter )
{
    if( ulIndex <= (ULONG32)(m_PluginList.GetCount()-1) && m_PluginList.GetCount() )
    {
	LISTPOSITION pPos = m_PluginList.FindIndex( ulIndex );
	if (pPos)
	{
	    Plugin2Handler::Plugin* pPlugin = (Plugin2Handler::Plugin*) m_PluginList.GetAt( pPos );
	    if( pPlugin )
	    {
		if (NO_ERRORS == pPlugin->GetInstance( pIUnkResult, pIUnkOuter ))
		{
		    return HXR_OK;
		}
		else
		{
		    return HXR_FAIL;
		}
	    }
	}
    }
    return HXR_FAIL;

}