basehand.h

linux下的一款播放器

    /************************************************************************
     *	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);


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

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

    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;

    HX_RESULT ReloadPluginsNoPropagate();
    HX_RESULT ReloadPluginsNoPropagateWithFindFile(
               PluginMountPoint* pMountPoint, CFindFile* pFileFinder,
               IHXBuffer* pPathBuffer, char* pszPluginDir);
    HX_RESULT ReloadPluginsNoPropagate( PluginMountPoint* pMountPoint );

private:

    void UnloadDeadDLLs(void);

    Errors		    LoadDLL(char* pszDllName, PluginMountPoint* pMountPoint);
    void		    LoadPluginsFromComponentDLL( BaseHandler::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);

    HX_RESULT		    RefreshPluginInfo( PluginMountPoint* pMountPoint );

    CHXMapStringToOb	    m_MountPoints;
    CHXSimpleList	    m_PluginDLLList;
    CHXSimpleList	    m_PluginList;
    CHXSimpleList	    m_MiscDLLList;
    CHXMapStringToOb	    m_GUIDtoSupportList;

    IUnknown*		    m_pContext;

    class PluginMountPoint
    {
    public:
	PluginMountPoint( BaseHandler* pContext, const char* pName,
			  UINT32 majorVersion, UINT32 minorVersion,
			  IHXBuffer* pPath );
	~PluginMountPoint();

	STDMETHOD_(ULONG32,AddRef)( THIS );
	STDMETHOD_(ULONG32,Release)( THIS );

#if !defined(_STATICALLY_LINKED) || defined(HELIX_CONFIG_CONSOLIDATED_CORE)
	IHXBuffer* Path();
#endif

    private:
#if !defined(_STATICALLY_LINKED) || defined(HELIX_CONFIG_CONSOLIDATED_CORE)
	IHXBuffer* m_pPath;
#endif
	INT32 m_lRefCount;
    };

    class PluginDLL : public IUnknown
    {
    public:
	PluginDLL(const char* pszFileName, PluginMountPoint* pMountPoint,
		    BaseHandler* pBaseHandler);

	~PluginDLL();

	/*
	 *	IUnknown methods
	 */
	STDMETHOD(QueryInterface)(THIS_ REFIID riid, void** ppvObj);
	STDMETHOD_(ULONG32,AddRef)	(THIS);
	STDMETHOD_(ULONG32,Release)	(THIS);


	Errors			Load(IUnknown* pContext);
	HX_RESULT		Unload(BOOL safe = TRUE);
	BOOL			IsLoaded();

	Errors			CreateInstance( IUnknown** ppUnk, UINT32 uIndex );

	UINT32			AddDLLReference();
	UINT32			ReleaseDLLReference();

	// Accessors
	void			SetHash(char* phash) {m_hash = phash;}
	void			SetFileSize(INT32 nSize) {m_nSizeBites = nSize;}

	PluginMountPoint*	GetMountPoint() { return m_pMountPoint; }
	IHXBuffer*		GetFileName();
	INT32			GetFileSize() { return m_nSizeBites; }
	void			SetNamespace(IHXBuffer* pNamespace);
	IHXBuffer*		GetNamespace();
	const char*		GetHash() { return (const char*) m_hash; }
	CHXString const&	GetPackageName () const { return m_packageName; }

	UINT32			GetNumPlugins() { return m_NumOfPlugins; }

	BOOL			DoesExist() { return m_bDoesExist; }

    private:
	FPCREATEINSTANCE	m_fpCreateInstance;
	FPSHUTDOWN		m_fpShutdown;
	FPCANUNLOAD2		m_fCanUnload;

	PluginMountPoint*	m_pMountPoint;
	IHXBuffer*		m_pFileName;
	IHXBuffer*		m_pNamespace;

	CHXString		m_packageName;
	CHXString		m_hash;
	LONG32			m_nSizeBites;
	INT32			m_lRefCount;
	UINT16			m_NumOfPlugins : 16;
	HX_BITFIELD		m_bHas_factory : 1;
	HX_BITFIELD		m_bLoaded : 1;
	BOOL			m_bDoesExist;

	DLLAccess*		m_pDLLAccess;
	UINT32			m_nActiveReferences;
	BaseHandler*		m_pBaseHandler;
    };

    class Plugin : public IUnknown
    {
	public:
	STDMETHOD(QueryInterface)	(THIS_
					REFIID riid,
					void** ppvObj);

	STDMETHOD_(ULONG32,AddRef)	(THIS);

	STDMETHOD_(ULONG32,Release)	(THIS);

	Plugin(IUnknown* pContext);

	~Plugin();

	// Exposed to the BaseHandler
	void                        SetPluginProperty(const char * pszPluginType);
	BOOL			    DoesMatch(IHXValues* pValues);

	Errors			    GetValuesFromDLL(IHXPlugin* pHXPlugin);
	// Creates an instance of the top-level plugin object
	Errors			    GetPlugin( REF(IUnknown*) ppUnknown );
	// Checks to see if this is a component plugin and does the appropriate indirection
	Errors			    GetInstance(REF(IUnknown*) ppUnknown, IUnknown* pIUnkOuter = NULL );
	HX_RESULT		    GetPluginInfo(REF(IHXValues*));
	IHXBuffer*		    GetFileName();
	BOOL			    IsLoaded();

	void			    SetInfoNeedsRefresh(BOOL bRefresh) { m_bInfoNeedsRefresh = bRefresh;}

	void			    SetDLL(PluginDLL * pPluginDll);
	PluginDLL*		    GetDLL() {return m_pPluginDLL;}
	void			    SetIndex(UINT16 nIndex);
	UINT16			    GetIndex() {return m_nPluginIndex;}

	void			    SetPropertyULONG32(char* , char*);
	void			    SetPropertyCString(char*, char*);
	void			    SetPropertyBuffer(char*, BYTE*, UINT32);

	// FIX  This is to support the initialization of component plugins
	void InitializeComponentPlugin( IHXPlugin* pIPlugin, IHXValues* pIValues );

	// void* because the client doesn't have these
	// XXXAH not supported currently...  They were not in the old plugin handler either...
	// must be some code in the server that talks directly to this (BLEECH!)
	void*			    m_process;

    private:
	LONG32			    m_lRefCount;
	UINT16			    m_nPluginIndex;
	PluginDLL*		    m_pPluginDLL;
	IHXValues*		    m_pValues;
	HX_BITFIELD		    m_bCanUnload : 1;
	HX_BITFIELD		    m_bInfoNeedsRefresh : 1;
	IUnknown*		    m_pContext;
	IHXCommonClassFactory*	    m_pClassFactory;


	// Methods to retreive from the DLL
	Errors	    GetBasicValues(IHXPlugin* pHXPlugin);
	Errors	    GetExtendedValues(IHXPlugin* pHXPlugin);

	// Support Functions
	HX_RESULT   CatStrings(char** pInStrings,
			       REF(IHXBuffer*) pOutBuffer);

	BOOL	    AreBufferEqual(IHXBuffer* pBigBuff,
				   IHXBuffer* pSmallBuff);
	Errors	    CreateWatcher(IUnknown* pUnknown);
    };

    class OtherDLL
    {
    public:
	    CHXString			m_filename;
	    CHXString			m_fileChecksum;
	    PluginMountPoint*		m_pMountPoint;
    };

};

class CPluginEnumerator :
    public CUnknownIMP,
    public IHXPluginSearchEnumerator
{
public:
    CPluginEnumerator();
    virtual ~CPluginEnumerator();

    DECLARE_UNKNOWN_NOCREATE( CPluginEnumerator )

    /*
     * IHXPluginSearchEnumerator
     */
    STDMETHOD_(UINT32, GetNumPlugins)(THIS);

    STDMETHOD_(void, GoHead)(THIS);
    STDMETHOD(GetNextPlugin)( THIS_ REF(IUnknown*) pIUnkResult,
				    IUnknown* pIUnkOuter );

    STDMETHOD(GetNextPluginInfo)( THIS_ REF(IHXValues*) pRetValues );


    STDMETHOD(GetPluginAt)( THIS_ UINT32 index,
				    REF(IUnknown*) pIUnkResult,
				    IUnknown* pIUnkOuter );

    STDMETHOD(GetPluginInfoAt)( THIS_ UINT32 index,
				    REF(IHXValues*) pRetValues );

    //---------------- Class methods
    void Add(BaseHandler::Plugin* pPlugin);

    // FIX This is for backwards compatibility, and should be removed
    HX_RESULT GetNext(REF(IUnknown*) pRetUnk);

protected:

private:
    CHXSimpleList   m_ListOfPlugins;
    UINT32	    m_nIndex;

};
#endif /* _BASEHAND_H_ */