plghand2.h

linux下的一款播放器

						    char* PropVal2, 
						    char* PropName3, 
						    char* PropVal3, 
						    REF(UINT32) unIndex);

    /************************************************************************
     *	Method:
     *	    IHXPlugin2Handler::FindReturnPluginUsingStrings
     *
     *	Purpose:    
     *	    Finds a plugin  which matches the set of values given. A Plugin
     *	    instance is returned. 
     *	    NOTE: that a max of two values may be given.
     */

    STDMETHOD(FindPluginUsingStrings)		    (THIS_ char* PropName1, 
						    char* PropVal1, 
						    char* PropName2, 
						    char* PropVal2, 
						    char* PropName3, 
						    char* PropVal3, 
						    REF(IUnknown*) pUnk);

    /************************************************************************
     *	Method:
     *	    IHXPlugin2Handler::FindImplementationFromClassID
     *
     *	Purpose:    
     *	    Finds a CommonClassFactory plugin which supports the 
     *	    ClassID given. An instance of the Class is returned. 
     */

    STDMETHOD(FindImplementationFromClassID)
    (
	REFGUID GUIDClassID, 
	REF(IUnknown*) pIUnknownInstance
    );

    /************************************************************************
     *	Method:
     *	    IHXPlugin2Handler::Close
     *
     *	Purpose:    
     *	    A function which performs all of the functions of delete.
     *	    
     *
     */
    
    STDMETHOD(Close)		(THIS); 

    /************************************************************************
     *	Method:
     *	    IHXPlugin2Handler::SetRequiredPlugins
     *
     *	Purpose:    
     *	    This function sets the required plugin list
     *	    
     *
     */

    STDMETHOD(SetRequiredPlugins) (THIS_ const char** ppszRequiredPlugins);

    /************************************************************************
     *	Method:
     *	    IHXPlugin2HandlerEnumeratorInterface::GetNumPluginsSupporting
     *
     *	Purpose:    Required for the plugin enumerator.
     *	    
     *	    
     *
     */

    STDMETHOD(GetNumPluginsSupporting) (THIS_ REFIID iid, REF(UINT32) nNumPlugins);

    /************************************************************************
     *	Method:
     *	    IHXPlugin2HandlerEnumeratorInterface::GetPluginIndexSupportingIID
     *
     *	Purpose:    Required for the plugin enumerator.
     *	    
     *	    
     *
     */
    STDMETHOD(GetPluginIndexSupportingIID) (THIS_ REFIID iid, UINT32 nPluginIndex, REF(UINT32) nIndexOut);

    /************************************************************************
     *	Method:
     *	    IHXPlugin2HandlerEnumeratorInterface::AddSupportedIID
     *
     *	Purpose:    Required for the plugin enumerator.
     *	    
     *	    
     *
     */
    STDMETHOD(AddSupportedIID) (THIS_ REFIID iid);



    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::RegisterContext
     *
     *	Purpose:    
     *	    Sets up the context without loading any plugin info
     *
     */
    STDMETHOD( RegisterContext )( THIS_ IUnknown* pContext );

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::AddPluginMountPoint
     *
     *	Purpose:    
     *
     */
    STDMETHOD( AddPluginMountPoint )( THIS_ const char* pName, UINT32 majorVersion,
					    UINT32 minorVersion, IHXBuffer* pPath );


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::RefreshPluginMountPoint
     *
     *	Purpose:    
     *
     */
    STDMETHOD( RefreshPluginMountPoint )( THIS_ const char* pName );


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::RemovePluginMountPoint
     *
     *	Purpose:    
     *
     */
    STDMETHOD( RemovePluginMountPoint )( THIS_ const char* pName );


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindImplementationFromClassID
     *
     *	Purpose:    
     *	    Finds a CommonClassFactory plugin which supports the 
     *	    ClassID given. An instance of the Class is returned. 
     *	    The plugin instance is initialized with the specified 
     *	    context
     */

    STDMETHOD( FindImplementationFromClassID )( THIS_ REFGUID GUIDClassID, 
		    REF(IUnknown*) pIUnknownInstance, IUnknown* pIUnkOuter, IUnknown* pContext );

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindCLSIDFromName
     *
     *	Purpose:    
     *
     *	    Maps a text name to a CLSID based on information from 
     *	    component plugins
     */
    STDMETHOD( FindCLSIDFromName )( THIS_ const char* pName, REF(IHXBuffer*) pCLSID );


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindGroupOfPluginsUsingValues
     *
     *	Purpose:    
     *	    Builds a collection of plugins that match the criteria
     *
     */
    STDMETHOD(FindGroupOfPluginsUsingValues)(THIS_ IHXValues* pValues, 
				    REF(IHXPluginSearchEnumerator*) pIEnumerator);

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindGroupOfPluginsUsingStrings
     *
     *	Purpose:    
     *	    Builds a collection of plugins that match the criteria
     *
     */
    STDMETHOD(FindGroupOfPluginsUsingStrings)(THIS_ char* PropName1, 
				    char* PropVal1, 
				    char* PropName2, 
				    char* PropVal2, 
				    char* PropName3, 
				    char* PropVal3, 
				    REF(IHXPluginSearchEnumerator*) pIEnumerator);


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::GetPlugin
     *
     *	Purpose:    
     *	    Allocates a plugin based on index.  Supports aggregation
     *
     */
    STDMETHOD(GetPlugin)(THIS_ ULONG32 ulIndex,
				    REF(IUnknown*) pIUnkResult,
				    IUnknown* pIUnkOuter );

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindPluginUsingValues
     *
     *	Purpose:    
     *	    Allocates a plugin based on criteria.  Supports aggregation
     *
     */
    STDMETHOD(FindPluginUsingValues)(THIS_ IHXValues*, 
				    REF(IUnknown*) pIUnkResult, 
				    IUnknown* pIUnkOuter );


    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::FindPluginUsingStrings
     *
     *	Purpose:    
     *	    Allocates a plugin based on criteria.  Supports aggregation
     *
     */
    STDMETHOD(FindPluginUsingStrings)(THIS_ char* PropName1, 
				    char* PropVal1, 
				    char* PropName2, 
				    char* PropVal2, 
				    char* PropName3, 
				    char* PropVal3, 
				    REF(IUnknown*) pIUnkResult, 
				    IUnknown* pIUnkOuter );

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::UnloadPluginFromClassID
     *
     *	Purpose:    
     *	    Finds a plugin from the classID and unloads it if it supports CanUnload2
	 *		and returns TRUE in response to query
     */

    STDMETHOD( UnloadPluginFromClassID )( THIS_ REFGUID GUIDClassID );

    /************************************************************************
     *	Method:
     *	    IHXPluginHandler3::UnloadPackageByName
     *
     *	Purpose:    
     *	    finds a package from the name passed in and attempts to unload it.
     */
    STDMETHOD (UnloadPackageByName) (const char* pName);


    //------------------------------------ IHXPluginDatabase interface methods
    STDMETHOD( AddPluginIndex ) ( THIS_ const char* pKeyName, EPluginIndexType indexType, BOOL bScanExisting );
    STDMETHOD( RemovePluginIndex )( THIS_ const char* pKeyName );
    STDMETHOD( FindPluginInfoViaIndex )( THIS_ const char* pKeyName, const void* pValue, IHXValues** ppIInfo );
    STDMETHOD( FindPluginSetViaIndex )( THIS_ const char* pKeyName, const void* pValue, IHXPluginSearchEnumerator** ppIEnumerator );
    STDMETHOD( CreatePluginViaIndex )( THIS_ const char* pKeyName, const void* pValue, IUnknown** ppIUnkPlugin, IUnknown* pIUnkOuter );


    //------------------------------------ Class Methods

    Errors		    Stat(const char* pszFilename, struct stat* pStatBuffer);
    IHXBuffer*		    ChecksumFile(char* pszFileName, IHXBuffer* pPathBuffer);
    IHXBuffer*		    ConvertToAsciiString(char* pBuffer, UINT32 nBuffLen);

    IHXBuffer*		    GetPluginDir();
    IHXPreferences*	    GetPreferences();
    CHXSimpleList&	    GetCanUnload2DllList() { return( m_CanUnload2DllList ); }

    HX_RESULT		    FindGroupOfPluginsUsingStrings(char* PropName1, 
						    char* PropVal1, 
						    char* PropName2, 
						    char* PropVal2, 
						    char* PropName3, 
						    char* PropVal3, 
						    REF(CPluginEnumerator*) pEnumerator);

    HX_RESULT		    FindGroupOfPluginsUsingValues(IHXValues* pValues, 
						    REF(CPluginEnumerator*) pEnumerator);

    void		    ReportError( UINT8 severity, const char* pDLLName, const char* pDesc );

    static const char* const	zm_pszFileExtension;
    static const char* const	zm_pszDirectorySeperator;
    static const char* const	zm_pszValueSeperator;
    static const char* const	zm_pszListStart;
    static const char* const	zm_pszListEnd;
    static const char* const	zm_pszValueSeperator2;
    static const char   	zm_cDirectorySeperator;
    static const char* const	zm_pszKeyNameRegKey;
    static const char* const	zm_pszRegKeySeperator;
#if !defined(HELIX_CONFIG_NOSTATICS)
    static BOOL 		zm_bFasterPrefs;
#else
    static const BOOL 		zm_bFasterPrefs;
#endif

    HX_RESULT AddtoLRU(Plugin2Handler::PluginDLL* pDLL);
    HX_RESULT RemoveFromLRU(Plugin2Handler::PluginDLL* pDLL);

    HX_RESULT UpdateCache();
    HX_RESULT ReloadPluginsNoPropagate();
    HX_RESULT ReloadPluginsNoPropagate( PluginMountPoint* pMountPoint );

private: 
    static HX_RESULT VerifyChecksum_ (const char*);

    void UnloadDeadDLLs(void);
    IHXScheduler*  m_pIScheduler;
    CallbackHandle  m_hScheduler;

    enum
    {
//	kPingDuration = 1000	// USE ONLY FOR TESTING
	kPingDuration = 60000	// 60000ms = 1 minute
    };

    IHXBuffer*		    GetDefaultPluginDir();
    void		    WriteSupportedGUIDs();

    HX_RESULT		    ConnectPluginToDLL(Plugin2Handler::Plugin * pPlugin);
    Errors		    LoadDLL(char* pszDllName, PluginMountPoint* pMountPoint);
    void		    LoadPluginsFromComponentDLL( Plugin2Handler::PluginDLL* pPluginDll, 
							IHXComponentPlugin* pIIterator );

    // Methods to determine out of data DLLs
    BOOL		    FindPlugin(const char* pFileName, UINT32 nDLLIndex, REF(UINT32) nIndex);
    HX_RESULT		    AddToValues(IHXValues*, char* pPropName, char* pPropVal, eValueTypes eValueType);
    UINT32		    GetNumSupportedGUIDs();
    HX_RESULT		    RemoveDLLFromGUIDSupportLists(const char* pszFileName);
    HX_RESULT		    GetGUIDForIndex(UINT32 nIndex, REF(CHXString) sGUID);
    HX_RESULT		    AddSupportForGUID(const char* pszGUID, PluginDLL* pDLL, UINT32 nIndexInDLL);

    BOOL		    GetPluginFileInfo( REF(char*) pszCurrentPos, 
					       REF(char*) pszName, 
					       REF(char*) pszCheckSum, 
					       REF(BOOL) bFactory, 
					       REF(int) nDLLSize, 
					       REF(int) nNumberPlugins);

    BOOL		    GetNameValuePair(REF(char*) pszCurrentPos, REF(char*) pszName, REF(char*) pszValue);
    BOOL		    GetPluginFileInfo(REF(char*) pszCurrentPos, REF(Plugin2Handler::Plugin*) pPlugin);
    BOOL		    GetNextSupportingFile(REF(char*) pszCurrentPos, REF(char*) pszFileName, REF(UINT32) index);
    BOOL		    GetGUIDInfo(REF(char*) pszCurrentPos, PluginMountPoint* pMountPoint, REF(char*) pszGUID, REF(CHXSimpleList*) pList);