plghand2.h

linux下的一款播放器

    void		    ReconnectDLL(const char* pszDLLName, Plugin2Handler::PluginDLL* pNewDLL);
    BOOL		    GetNonHXInfo(REF(char*) pszCurrentPos, PluginMountPoint* pMountPoint, REF(Plugin2Handler::OtherDLL*) pOtherData);
    void		    WriteHugePref( IHXPreferences* pPrefs, const char* pszKeyName, IHXBuffer* pBigBuffer);
    HX_RESULT		    ReadHugePref( IHXPreferences* pPrefs, const char* pszKeyName, REF(IHXBuffer*) pBigBuffer);
    void		    DeleteHugePref_ (IHXPreferences*, IHXPreferences3*, const char*);

    // Internal shared code
    HX_RESULT 		    FindImplementationFromClassIDInternal( 
					    REFGUID GUIDClassID, 
					    REF(IUnknown*) pIUnknownInstance, 
					    IUnknown* pContext );


    // New plugin info loading methods
    HX_RESULT ClearMountPoint_ (PluginMountPoint*);

    HX_RESULT RefreshPluginInfo( PluginMountPoint* pMountPoint );
    HX_RESULT WritePluginInfo( PluginMountPoint* pMountPoint );

    HX_RESULT ReadPluginInfoFast( PluginMountPoint* pMountPoint );
    HX_RESULT WritePluginInfoFast( PluginMountPoint* pMountPoint );

    HX_RESULT ReadPluginInfoSlow( PluginMountPoint* pMountPoint );
    HX_RESULT WritePluginInfoSlow( PluginMountPoint* pMountPoint );

    CPluginDatabaseIndex* FindDBIndex( const char* pKeyName );
    void AddPluginToIndices( Plugin2Handler::Plugin* pPlugin );
    void RemovePluginFromIndices( Plugin2Handler::Plugin* pPlugin );


    CHXMapStringToOb	    m_MountPoints;
    CHXSimpleList	    m_PluginDLLList;
    CHXSimpleList	    m_PluginList;
    CHXSimpleList	    m_MiscDLLList;
    CHXSimpleList	    m_CanUnload2DllList;
    CHXMapStringToOb	    m_GUIDtoSupportList;
    CHXMapStringToOb	    m_dbIndices;

    CHXMapStringToOb	    m_GUIDSupportListIsValid;
    CHXMapStringToOb	    m_FileNameMap;
    
    IHXBuffer*		    m_pPluginDir;
    IHXPreferences*	    m_pPreferences;
    IHXErrorMessages*	    m_pErrorMessages;
    IUnknown*		    m_pContext;
    INT32		    m_nCacheSizeBites;
    CHXSimpleList	    m_DLL_LRUList;


    class PluginMountPoint
    {
    public:
	PluginMountPoint( Plugin2Handler* pContext, const char* pName, 
			    UINT32 majorVersion, UINT32 minorVersion, 
			    IHXBuffer* pPath );
	~PluginMountPoint();
    
	STDMETHOD_(ULONG32,AddRef)( THIS );
	STDMETHOD_(ULONG32,Release)( THIS );
    
	void AddClient();
	INT32 RemoveClient();

	// XXXND  This is for backward compatibility
	BOOL IsHXCompliant();

	IHXPreferences* Prefs();
	IHXBuffer* Path();
	    
    private:
	INT32 m_lRefCount;
	INT32 m_lClientCount;
    
	// XXXND  This is for backward compatibility
	BOOL m_bHXCompliant;

	IHXPreferences* m_pIPrefs;
	IHXBuffer* m_pIPath;
    };


    class PluginDLL : public IUnknown
    {
    public:
	PluginDLL(const char* pszFileName, PluginMountPoint* pMountPoint, 
		    Plugin2Handler* pPlugin2Handler);

	~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();

	void			SetPref( int nNumberPlugins, char* pszCheckSum, int nDLLSize, BOOL bFactory );
	HX_RESULT		WritePref2( REF(CPluginInfoWriter) piw);
	HX_RESULT		WritePref( PreferenceEnumerator* pPrefEnum );
	HX_RESULT		ReadPref( PreferenceEnumerator* pPrefs );

	// 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; 
	Plugin2Handler*		m_pPlugin2Handler;
    };

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

	STDMETHOD_(ULONG32,AddRef)	(THIS);

	STDMETHOD_(ULONG32,Release)	(THIS);
	STDMETHOD(AllObjectsDeleted)	(THIS_ void*);


	Plugin(IUnknown* pContext);

	~Plugin();  

	// Exposed to the Plugin2Handler
	BOOL			    DoesMatch(IHXValues* pValues);
	HX_RESULT		    WritePref2(REF(CPluginInfoWriter) piw);

	HX_RESULT		    WritePref(PreferenceEnumerator* pPrefEnum);
	HX_RESULT		    ReadPref(PreferenceEnumerator* pPrefs);

	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();
	BOOL			    DoesInfoNeedsRefresh() {return m_bInfoNeedsRefresh;}
	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);

	// this causes an init plugins should be handled with care.
	HX_RESULT		    GetBandwidthInfo();			

	// 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;


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

	// Support Functions
	HX_RESULT   CatStrings(		    char** pInStrings, 
					    REF(IHXBuffer*) pOutBuffer);
	HX_RESULT   CatPropertiesULONG32(   REF(IHXBuffer*) pBuffer, 
					    const char* pPropName, 
					    ULONG32 nValue);
	HX_RESULT   CatPropertiesCString(   REF(IHXBuffer*) pBuffer, 
					    const char* pPropName, 
					    IHXBuffer* pValue);
	BOOL	    GetNextValueFromString( REF(char*) pszValues, 
					    REF(UINT32) nType, 
					    REF(IHXBuffer*) pValueNameBuffer, 
					    REF(IHXBuffer*) pValueBuffer, 
					    REF(ULONG32) nValue);
	BOOL	    AreBufferEqual(	    IHXBuffer* pBigBuff, 
					    IHXBuffer* pSmallBuff);
	Errors	    CreateWatcher(IUnknown* pUnknown);
    };

    class PluginSupportingGUID
    {
    public:
	    CHXString			m_filename;
	    UINT32			m_nIndexInDLL;
	    PluginMountPoint*		m_pMountPoint;
    };

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

    class PreferenceEnumerator
    {
	public:
	    HX_RESULT		    BeginSubPref(const char* pszSubPref);
	    HX_RESULT		    EndSubPref();
	    HX_RESULT		    WriteSubPref(const char* pszSubName, IHXBuffer* pBuffer);
	    HX_RESULT		    ReadPref(const char* pszSubName, REF(IHXBuffer*) /*OUT*/ pBuffer);
	    HX_RESULT		    GetPrefKey(UINT32 nIndex, IHXBuffer*& pBuffer);
	    HX_RESULT		    ResetPropNameList();

	    PreferenceEnumerator(IHXPreferences* pIHXPref);
	    ~PreferenceEnumerator();


	private:

	    CHXString			m_RegKey;
	    CHXSimpleList		m_ListofProps;
	    IHXPreferenceEnumerator*	m_pPrefEnum;
	    IHXPreferences*		m_pPreferences;
    };
};


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(Plugin2Handler::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;

};

// Helper class used to write plugin info to registry...
class CPluginInfoWriter
{
public:
    CPluginInfoWriter();
    ~CPluginInfoWriter();
    HX_RESULT Init(IHXPreferences* pPrefs, const char* pBaseKeyName, IHXBuffer* pIHXBuffer);
    HX_RESULT Write(IHXBuffer *pBuffer);
    HX_RESULT Write(const char *pInfo);
    HX_RESULT Write(const char *pInfo, UINT32 len);
    HX_RESULT Flush();

private:
    void TerminateBuffer();
    void WriteToRegistry();
    static BOOL IsAscii7Compliant (const char*, const UINT32 len);

    IHXBuffer* m_pIHXBuffer; // Contains a pointer to internal buffer
    IHXPreferences* m_pIHXPreferences; // Used to write to registry
    UINT32 m_NumWrites;  // Keeps track of how many times we have written to registry during lifetime of class
    UINT32 m_BufUsed;    // Keeps track of how much we have written to internal buffer between writes to registry
    UINT32 m_BufSize;    // Size of internal buffer; Used to determine when to write info to registry
    UINT32 m_Checksum;	 // Total size of the data written to the registry across the lifetime of the object.

    CHXString m_BaseKeyName; // Combined with m_NumWrite to generate the name of the registry key to which we write
};

#endif /* _PLGNHAND_H_ */