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sinkctl.h：源码内容
							/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: sinkctl.h,v 1.2.8.1 2004/07/09 02:05:58 hubbe Exp $
 * 
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 * 
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 * This file is part of the Helix DNA Technology. RealNetworks is the
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 * portions it created.
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 * This file, and the files included with this file, is distributed
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 * ***** END LICENSE BLOCK ***** */
#ifndef _SINKCTL_
#define _SINKCTL_
struct IHXInterruptState;
struct IHXClientEngine;
struct IHXCallback;
struct IHXScheduler;
class  CHXSimpleList;
class  ErrorCallback;
class  CHXGenericCallback;
class CHXAdviseSinkControl : public IHXClientAdviseSink, public IHXInterruptSafe
{
public:
    CHXAdviseSinkControl();
    ~CHXAdviseSinkControl();
    
    /*
     *	IUnknown methods
     */
    STDMETHOD(QueryInterface)		(THIS_
					REFIID riid,
					void** ppvObj);
    STDMETHOD_(ULONG32,AddRef)		(THIS);
    STDMETHOD_(ULONG32,Release)		(THIS);
    /*
     *	IHXClientAdviseSink methods
     */
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPosLength
     *	Purpose:
     *	    Called to advise the client that the position or length of the
     *	    current playback context has changed.
     */
    STDMETHOD(OnPosLength)		(THIS_
					UINT32	  ulPosition,
					UINT32	  ulLength);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPresentationOpened
     *	Purpose:
     *	    Called to advise the client a presentation has been opened.
     */
    STDMETHOD(OnPresentationOpened)	(THIS);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPresentationClosed
     *	Purpose:
     *	    Called to advise the client a presentation has been closed.
     */
    STDMETHOD(OnPresentationClosed)	(THIS);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnStatisticsChanged
     *	Purpose:
     *	    Called to advise the client that the presentation statistics
     *	    have changed. 
     */
    STDMETHOD(OnStatisticsChanged)	(THIS);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPreSeek
     *	Purpose:
     *	    Called by client engine to inform the client that a seek is
     *	    about to occur. The render is informed the last time for the 
     *	    stream's time line before the seek, as well as the first new
     *	    time for the stream's time line after the seek will be completed.
     *
     */
    STDMETHOD (OnPreSeek)	(THIS_
				ULONG32		    ulOldTime,
				ULONG32		    ulNewTime);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPostSeek
     *	Purpose:
     *	    Called by client engine to inform the client that a seek has
     *	    just occured. The render is informed the last time for the 
     *	    stream's time line before the seek, as well as the first new
     *	    time for the stream's time line after the seek.
     *
     */
    STDMETHOD (OnPostSeek)	(THIS_
				ULONG32		    ulOldTime,
				ULONG32		    ulNewTime);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnStop
     *	Purpose:
     *	    Called by client engine to inform the client that a stop has
     *	    just occured. 
     *
     */
    STDMETHOD (OnStop)		(THIS);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnPause
     *	Purpose:
     *	    Called by client engine to inform the client that a pause has
     *	    just occured. The render is informed the last time for the 
     *	    stream's time line before the pause.
     *
     */
    STDMETHOD (OnPause)		(THIS_
				ULONG32		    ulTime);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnBegin
     *	Purpose:
     *	    Called by client engine to inform the client that a begin or
     *	    resume has just occured. The render is informed the first time 
     *	    for the stream's time line after the resume.
     *
     */
    STDMETHOD (OnBegin)		(THIS_
				ULONG32		    ulTime);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnBuffering
     *	Purpose:
     *	    Called by client engine to inform the client that buffering
     *	    of data is occuring. The render is informed of the reason for
     *	    the buffering (start-up of stream, seek has occured, network
     *	    congestion, etc.), as well as percentage complete of the 
     *	    buffering process.
     *
     */
    STDMETHOD (OnBuffering)	(THIS_
				ULONG32		    ulFlags,
				UINT16		    unPercentComplete);
    /************************************************************************
     *	Method:
     *	    IHXClientAdviseSink::OnContacting
     *	Purpose:
     *	    Called by client engine to inform the client is contacting
     *	    hosts(s).
     *
     */
    STDMETHOD (OnContacting)		(THIS_
					const char* pHostName);
	/*
	  IHXInteruptSafe methods. 
	*/
	
	STDMETHOD_(BOOL,IsInterruptSafe)		(THIS);
    /*
     *	CHXAdviseSinkControl methods
     */
    HX_RESULT AddAdviseSink(IHXClientAdviseSink*	pAdviseSink);
    HX_RESULT RemoveAdviseSink(IHXClientAdviseSink*	pAdviseSink);
    void      Init(IHXClientEngine* pEngine);
private:
    CHXSimpleList	m_pSinkList;
    LONG32		m_lRefCount;
    IHXInterruptState* m_pInterruptState;
    IHXScheduler*	m_pScheduler;
    struct PlayerAdviseSink;
    friend struct PlayerAdviseSink;
    struct PlayerAdviseSink
    {
    	PlayerAdviseSink(IHXClientAdviseSink*	pAdviseSink,
                        BOOL bInterruptSafe);
	~PlayerAdviseSink();
    
    	IHXClientAdviseSink*	m_pAdviseSink;
    	BOOL			m_bInterruptSafe;
	CHXSimpleList*		m_pPendingAdviseList;
    };
    typedef enum 
    {
	  ONPOSLENGTH = 0
	, ONPRESENTATIONOPENED
	, ONPRESENTATIONCLOSED
	, ONSTATISTICSCHANGED
	, ONPRESEEK
	, ONPOSTSEEK
	, ONSTOP
	, ONPAUSE
	, ONBEGIN
	, ONBUFFERING
	, ONCONTACTING
    } AdviseType;
    struct PendingAdvise;
    friend struct PendingAdvise;
    struct PendingAdvise
    {
	PendingAdvise()
	{
	    m_pHostName = NULL;
	}
	~PendingAdvise()
	{
	    if (m_pHostName)
	    {
		delete [] m_pHostName;
	    }
	}
	AdviseType  m_AdviseType;
	UINT32	    m_ulArg1;
	UINT32	    m_ulArg2;
	char*	    m_pHostName;
    };
    void AddToPendingList(PlayerAdviseSink*	pPlayerAdviseSink,
			  AdviseType		type,
			  UINT32		ulArg1 = 0, 
			  UINT32		ulArg2 = 0, 
			  char*			pHostName = NULL);
    void ProcessPendingRequests(PlayerAdviseSink* pPlayerAdviseSink);
    void ProcessAllRequests(void);
    CHXGenericCallback*    m_pCallback;
    static void AdviseSinkCallback(void* pParam);    
};
struct ErrorReport
{
    ErrorReport()
    {
	m_unSeverity	= 0;
	m_ulHXCode	= 0;
	m_ulUserCode	= 0;
	m_pUserString	= NULL;
	m_pMoreInfoURL	= NULL;
    }
    ~ErrorReport()
    {
	m_unSeverity	= 0;
	m_ulHXCode	= 0;
	m_ulUserCode	= 0;
	HX_VECTOR_DELETE(m_pUserString);
	HX_VECTOR_DELETE(m_pMoreInfoURL);
    }
    UINT8	m_unSeverity;
    HX_RESULT   m_ulHXCode;
    ULONG32     m_ulUserCode;
    char*	m_pUserString;
    char*	m_pMoreInfoURL;
};
class CHXErrorSinkControl : public IHXErrorSinkControl
{
    public:
    	CHXErrorSinkControl();
	~CHXErrorSinkControl();
	/*
	 * IHXErrorSinkControl methods
	 */
    	STDMETHOD(AddErrorSink)		(THIS_ 
    					IHXErrorSink*	pErrorSink,
                                	const UINT8     unLowSeverity,
                                	const UINT8     unHighSeverity);
    	STDMETHOD(RemoveErrorSink)	(THIS_ IHXErrorSink*	pErrorSink);
	/*
	 * IUnknown methods
	 */
	STDMETHOD(QueryInterface)	(THIS_ REFIID riid, void** ppvObj);
	STDMETHOD_(ULONG32,AddRef)	(THIS);
	STDMETHOD_(ULONG32,Release)	(THIS);
    
    	//get the severity range for pErrorSink
    	void GetSeverityRange(IHXErrorSink* pErrorSink, UINT8& unLowSeverity, 
    							 UINT8& unHighSeverity);
	void Init(IHXClientEngine* pEngine);
	void Close();
    	
	HX_RESULT ErrorOccurred(const UINT8	unSeverity,  
				const ULONG32	ulHXCode,
				const ULONG32	ulUserCode,
				const char*	pUserString,
				const char*	pMoreInfoURL
				);
    	struct PlayerErrorSink
    	{
    	    PlayerErrorSink(IHXErrorSink*  pErrorSink,
                            const UINT8     unLowSeverity,
                            const UINT8     unHighSeverity)
            {
	    	m_pErrorSink = pErrorSink;
	    	m_unLowSeverity = unLowSeverity;
	    	m_unHighSeverity = unHighSeverity;
            };
        
    	    IHXErrorSink*	m_pErrorSink;
    	    UINT8		m_unLowSeverity;
    	    UINT8		m_unHighSeverity;
    	};
    	
    public:
    	CHXSimpleList	m_pSinkList;
    
    private:
	HX_RESULT	CallReport(
				const UINT8	unSeverity,  
				HX_RESULT	ulHXCode,
				const ULONG32	ulUserCode,
				const char*	pUserString,
				const char*	pMoreInfoURL);
	void		ReportPendingErrors(void);
    
	friend class ErrorCallback;
    	LONG32		    m_lRefCount;
	IHXInterruptState* m_pInterruptState;
	IHXScheduler*	    m_pScheduler;
	CHXSimpleList*	    m_pPendingErrorList;
        CHXGenericCallback* m_pErrorCallback;
        static void ErrorCallback(void* pParam);
};
#endif /* _SINKCTL_ */

						