memfsys.h

linux下的一款播放器

    STDMETHOD(GetPropertyCString)	(THIS_
					const char*      pPropertyName,
					REF(IHXBuffer*) pPropertyValue) NOTIMPL

    STDMETHOD(GetFirstPropertyCString)	(THIS_
					REF(const char*) pPropertyName,
					REF(IHXBuffer*) pPropertyValue) NOTIMPL

    STDMETHOD(GetNextPropertyCString)	(THIS_
					REF(const char*) pPropertyName,
					REF(IHXBuffer*) pPropertyValue) NOTIMPL

    static IHXMemoryFileContext* z_pMemCtx;

    static UINT32  z_uMaxRecursionLevel;

};

/////////////////////////////////////////////////////////////////////////////
// 
//  Class:
//
//  	CMemoryFileObject
//
//  Purpose:
//
//  	Example implementation of a basic file system file object.
//

class CMemoryFileObject :   public IHXFileObject, 
			    public IHXFileStat,
			    public IHXFileExists,
			    public IHXGetFileFromSamePool,
			    public IHXFileMimeMapper,
			    public IHXRequestHandler,
			    public IHXPendingStatus,
			    public IHXFileResponse
{
private:
    UINT32		    m_ulPos;
    BOOL		    m_bCanBeReOpened;
    LONG32		    m_lRefCount;
    ULONG32	    	    m_ulFlags;
    IHXScheduler*	    m_pScheduler;
    IUnknown*		    m_pContext;
    IHXCommonClassFactory* m_pCommonClassFactory;
    IHXFileResponse*	    m_pFileResponse;
    IHXFileSystemObject*   m_pFileSystem;
    IHXRequest*	    m_pRequest;
    CChunkyRes*		    m_pChunkyRes;
    BOOL		    m_bLocalClose;
    char*		    m_pFilename;
    CHXString		    m_base_path;
    UINT16		    m_uRecursionCount;
    BOOL		    m_bInReadDone;
    UINT32		    m_ulPendingReadCount;
    BOOL		    m_bReadCancelled;
    BOOL		    m_bSeekPending;
    BOOL		    m_bAsynchInit;
    BOOL		    m_bClosed;
    CMemoryFileStatus*	    m_pStatus;
    CHXString		    m_strHeaderContentType;

    void		    Process(void);
    void		    UpdateFileNameMember(void);
    IHXMemoryFileSystem*   GetMemoryFileSystem(void);
    IHXMemoryFileSystem2*  GetMemoryFileSystem2(void);

    class SMPLFileObjCallback : public IHXCallback
    {
    private:
	LONG32		    m_lRefCount;
			    ~SMPLFileObjCallback();

	PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
    public:

	BOOL		    m_bIgnoreCallback;

			    SMPLFileObjCallback(CMemoryFileObject* pFileObject);

	CMemoryFileObject*  m_pSMPLFileObject;
	BOOL		    m_bCallbackPending;
	ULONG32		    m_ulPendingCallbackID;

	/*
	 *	IUnknown methods
	 */
	STDMETHOD(QueryInterface)	(THIS_
					REFIID riid,
					void** ppvObj);

	STDMETHOD_(ULONG32,AddRef)	(THIS);

	STDMETHOD_(ULONG32,Release)	(THIS);

	/*
	 *	IHXCallback methods
	 */
	STDMETHOD(Func)			(THIS);
    };

    friend class SMPLFileObjCallback;

    SMPLFileObjCallback*		m_pCallback;

public:
    CMemoryFileObject
    (
	CHXString& base_path, 
	IHXFileSystemObject*, 
	IUnknown*
    );
    ~CMemoryFileObject();

    /*
     *	IUnknown methods
     */
    STDMETHOD(QueryInterface)	(THIS_
    	    	    	    	REFIID riid,
    	    	    	    	void** ppvObj);

    STDMETHOD_(ULONG32,AddRef)	(THIS);

    STDMETHOD_(ULONG32,Release)	(THIS);

    /*
     *	IHXFileObject methods
     */

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Init
     *	Purpose:
     *	    Associates a file object with the file response object it should
     *	    notify of operation completness. This method should also check
     *	    for validity of the object (for example by opening it if it is
     *	    a local file).
     */
    STDMETHOD(Init)		(THIS_
				ULONG32		    /*IN*/	ulFlags,
				IHXFileResponse*   /*IN*/	pFileResponse);

    /************************************************************************
     *  Method:
     *      IHXFileObject::GetFilename
     *  Purpose:
     *      Returns the filename (without any path information) associated
     *      with a file object.
     */
    STDMETHOD(GetFilename)      (THIS_
				REF(const char*)    /*OUT*/  pFilename);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Close
     *	Purpose:
     *	    Closes the file resource and releases all resources associated
     *	    with the object.
     */
    STDMETHOD(Close)	    	(THIS);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Read
     *	Purpose:
     *	    Reads a buffer of data of the specified length from the file
     *	    and asynchronously returns it to the caller via the 
     *	    IHXFileResponse interface passed in to Init.
     */
    STDMETHOD(Read)		(THIS_
    	    	    	    	ULONG32	    	    ulCount);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Write
     *	Purpose:
     *	    Writes a buffer of data to the file and asynchronously notifies
     *	    the caller via the IHXFileResponse interface passed in to Init,
     *	    of the completeness of the operation.
     */
    STDMETHOD(Write)	    	(THIS_
    	    	    	    	IHXBuffer*	    pBuffer);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Seek
     *	Purpose:
     *	    Seeks to an offset in the file and asynchronously notifies
     *	    the caller via the IHXFileResponse interface passed in to Init,
     *	    of the completeness of the operation.
     */
    STDMETHOD(Seek)		(THIS_
    	    	    	    	 ULONG32	    ulOffset,
				 BOOL               bRelative);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Stat
     *	Purpose:
     *	    Collects information about the file that is returned to the
     *      caller in an IHXStat object
     */
    STDMETHOD(Stat)		(THIS_
				IHXFileStatResponse* pFileStatResponse);

    /************************************************************************
     *	Method:
     *	    IHXFileObject::Advise
     *	Purpose:
     *      To pass information to the File Object
     */
    STDMETHOD(Advise)	(THIS_
			ULONG32 ulInfo);


    /************************************************************************
     *	Method:
     *	    IHXGetFileFromSamePool::GetFileObjectFromPool
     *	Purpose:
     *      To get another FileObject from the same pool. 
     */
    STDMETHOD(GetFileObjectFromPool)	(THIS_
					 IHXGetFileFromSamePoolResponse*);

    // IHXFileExists interface
    /************************************************************************
     *	Method:
     *	    IHXFileExists::DoesExist
     *	Purpose:
     */
    STDMETHOD(DoesExist) (THIS_
			const char*		/*IN*/  pPath, 
			IHXFileExistsResponse* /*IN*/  pFileResponse);


    //IHXRequestHandler methods
    /************************************************************************
     *	Method:
     *	    IHXRequestHandler::SetRequest
     *	Purpose:
     *	    Associates an IHXRequest with an object
     */
    STDMETHOD(SetRequest)   	(THIS_
			    	IHXRequest*        /*IN*/  pRequest);

    /************************************************************************
     *	Method:
     *	    IHXRequestHandler::GetRequest
     *	Purpose:
     *	    Gets the IHXRequest object associated with an object
     */
    STDMETHOD(GetRequest)   	(THIS_
			    	REF(IHXRequest*)  /*OUT*/  pRequest);


    /*
     *	IHXFileMimeMapper methods
     */

    /************************************************************************
     *	Method:
     *	    IHXFileMimeMapper::FindMimeType
     *	Purpose:
     */
    STDMETHOD(FindMimeType) (THIS_
			    const char*			/*IN*/  pURL, 
			    IHXFileMimeMapperResponse* /*IN*/  pMimeMapperResponse
			    );


    /*
     * IHXPendingStatus methods
     */

    /************************************************************************
     *	Method:
     *	    IHXPendingStatus::GetStatus
     *	Purpose:
     *	    Called by the user to get the current pending status from an object
     */
    STDMETHOD(GetStatus)	(THIS_
				REF(UINT16) uStatusCode, 
				REF(IHXBuffer*) pStatusDesc, 
				REF(UINT16) ulPercentDone);

    /*
     *	IHXFileResponse methods
     */

    /************************************************************************
     *	Method:
     *	    IHXFileResponse::InitDone
     *	Purpose:
     *	    Notification interface provided by users of the IHXFileObject
     *	    interface. This method is called by the IHXFileObject when the
     *	    initialization of the file is complete. If the file is not valid 
     *	    for the file system, the status HXR_FAILED should be 
     *	    returned.
     */
    STDMETHOD(InitDone)			(THIS_
					HX_RESULT	    status);

    /************************************************************************
     *	Method:
     *	    IHXFileResponse::CloseDone
     *	Purpose:
     *	    Notification interface provided by users of the IHXFileObject
     *	    interface. This method is called by the IHXFileObject when the
     *	    close of the file is complete.
     */
    STDMETHOD(CloseDone)		(THIS_
					HX_RESULT	    status);

    /************************************************************************
     *	Method:
     *	    IHXFileResponse::ReadDone
     *	Purpose:
     *	    Notification interface provided by users of the IHXFileObject
     *	    interface. This method is called by the IHXFileObject when the
     *	    last read from the file is complete and a buffer is available.
     */
    STDMETHOD(ReadDone)			(THIS_ 
					HX_RESULT	    status,
					IHXBuffer*	    pBuffer);

    /************************************************************************
     *	Method:
     *	    IHXFileResponse::WriteDone
     *	Purpose:
     *	    Notification interface provided by users of the IHXFileObject
     *	    interface. This method is called by the IHXFileObject when the
     *	    last write to the file is complete.
     */
    STDMETHOD(WriteDone)		(THIS_ 
					HX_RESULT	    status);

    /************************************************************************
     *	Method:
     *	    IHXFileResponse::SeekDone
     *	Purpose:
     *	    Notification interface provided by users of the IHXFileObject
     *	    interface. This method is called by the IHXFileObject when the
     *	    last seek in the file is complete.
     */
    STDMETHOD(SeekDone)			(THIS_ 
					HX_RESULT	    status);

    /************************************************************************
     *	Method:
     *	    Private interface::_OpenFile
     *	Purpose:
     *	    open chunky res
     */
    STDMETHOD(_OpenFile)    (THIS_
			    ULONG32 ulFlags);

    /************************************************************************
     *	Method:
     *	    Private interface::_CloseFile
     *	Purpose:
     *	    close chunky res
     */
    STDMETHOD(_CloseFile) (THIS_);

};

#endif // ndef _MEMFSYS_H_