294 lines
9.6 KiB
OpenEdge ABL
294 lines
9.6 KiB
OpenEdge ABL
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/*++
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Copyright (c) Microsoft Corporation. All rights reserved.
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Module Name:
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mspterm.h
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Abstract:
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Definitions for the CBaseTerminal and CSingleFilterTerminal classes.
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--*/
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#ifndef _MSPTERM_H_
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#define _MSPTERM_H_
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template <class T>
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class ITTerminalVtblBase : public ITTerminal
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{
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};
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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//
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// CBaseTerminal
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//
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// This is the base terminal implementation. All terminals must derive
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// from this class.
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//
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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class CBaseTerminal :
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virtual public CComObjectRootEx<CComMultiThreadModelNoCS>, // we have our own CS implementation
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public IDispatchImpl<ITTerminalVtblBase<CBaseTerminal>, &IID_ITTerminal, &LIBID_TAPI3Lib>,
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public ITTerminalControl
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{
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BEGIN_COM_MAP(CBaseTerminal)
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COM_INTERFACE_ENTRY(IDispatch)
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COM_INTERFACE_ENTRY(ITTerminal)
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COM_INTERFACE_ENTRY(ITTerminalControl)
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COM_INTERFACE_ENTRY_AGGREGATE(IID_IMarshal, m_pFTM)
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END_COM_MAP()
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DECLARE_VQI()
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DECLARE_GET_CONTROLLING_UNKNOWN()
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public:
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CBaseTerminal();
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virtual ~CBaseTerminal();
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// ITTerminal -- COM interface for use by MSP or application
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public:
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STDMETHOD(get_TerminalClass)(OUT BSTR *pVal);
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STDMETHOD(get_TerminalType) (OUT TERMINAL_TYPE *pVal);
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STDMETHOD(get_State) (OUT TERMINAL_STATE *pVal);
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STDMETHOD(get_Name) (OUT BSTR *pVal);
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STDMETHOD(get_MediaType) (OUT long * plMediaType);
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STDMETHOD(get_Direction) (OUT TERMINAL_DIRECTION *pDirection);
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public:
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// Public methods that the MSP implementation calls.
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virtual HRESULT Initialize (
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IN IID iidTerminalClass,
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IN DWORD dwMediaType,
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IN TERMINAL_DIRECTION Direction,
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IN MSP_HANDLE htAddress
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);
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public:
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// ITTerminalControl -- COM interface for use by MSP only
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// This has to be a COM interface rather than a set of public methods because
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// the MSP needs to be able to call them for dynamic terminals as well.
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//
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// We implement get_AddressHandle, ConnectTerminal and DisconnectTerminal
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// The derived classes must implement RunRenderFilter and
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// StopRenderFilter (implementation depends on # of filters)
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//
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STDMETHOD (get_AddressHandle) (
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OUT MSP_HANDLE * phtAddress
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);
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//
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// enters each of the internal filters into the filter graph
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// connects the internal filters together (if applicable)
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// and returns all the filters to be used as connection points
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//
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STDMETHOD (ConnectTerminal) (
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IN IGraphBuilder * pGraph,
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IN DWORD dwTerminalDirection,
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IN OUT DWORD * pdwNumPins,
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OUT IPin ** ppPins
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);
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//
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// CompleteConnectTerminal -- called after a successful ConnectTerminal
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// so that the terminal can do post-connection intitialization
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//
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STDMETHOD (CompleteConnectTerminal) (void);
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//
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// disconnects the internal filters from each other (if applicable)
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// and removes them from the filter graph (thus breaking connections to
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// the stream).
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// Filter graph parameter is used for validation, to make sure the terminal
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// is disconnected from the same graph that it was originally connected to.
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//
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STDMETHOD (DisconnectTerminal) (
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IN IGraphBuilder * pGraph,
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IN DWORD dwReserved
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);
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//
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// stops the rightmost render filter in the terminal
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// (needed for dynamic filter graphs)
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//
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STDMETHOD (RunRenderFilter) (void) = 0;
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//
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// stops the rightmost render filter in the terminal
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// (needed for dynamic filter graphs)
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//
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STDMETHOD (StopRenderFilter) (void) = 0;
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protected:
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// The lock that protects the data members.
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CMSPCritSection m_CritSec;
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public:
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TERMINAL_DIRECTION m_TerminalDirection;
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TERMINAL_TYPE m_TerminalType;
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TERMINAL_STATE m_TerminalState;
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TCHAR m_szName[MAX_PATH + 1];
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IID m_TerminalClassID;
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DWORD m_dwMediaType;
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MSP_HANDLE m_htAddress;
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// Pointer to the free threaded marshaler.
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IUnknown * m_pFTM;
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// stores the filter graph builder (derives from IFilterGraph)
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CComPtr<IGraphBuilder> m_pGraph;
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// The following functions are to be implemented by the derived terminals
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virtual HRESULT AddFiltersToGraph() = 0;
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// By default terminals do nothing for preconnect
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virtual HRESULT ConnectFilters() { return S_OK; }
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// Returns the number of pins that will be exposed by
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// GetExposedPins(). The implementation can use pGraph
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// to actually mess with filters in a graph if it needs to
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// do so in order to figure out how many pins it has, but normally
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// that's not the case.
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// Arguments are checked by the caller.
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virtual HRESULT GetNumExposedPins(
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IN IGraphBuilder * pGraph,
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OUT DWORD * pdwNumPins
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) = 0;
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// Returns an array of pins that the stream can connect to.
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// Arguments are checked by the caller.
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virtual HRESULT GetExposedPins(
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OUT IPin ** ppPins
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) = 0;
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virtual DWORD GetSupportedMediaTypes(void) = 0;
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virtual HRESULT RemoveFiltersFromGraph() = 0;
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// Do we support this media?
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BOOL MediaTypeSupported(long lMediaType);
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};
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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// //
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// CSingleFilterTerminal //
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// //
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// This is a base class for a terminal with a single filter and pin. The //
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// terminal could be any direction or media type, and it could be static //
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// or dynamic. //
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// //
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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class CSingleFilterTerminal :
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public CBaseTerminal
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{
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// If we add any additional interfaces to this class then
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// we must uncomment and expand the following.
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//
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// BEGIN_COM_MAP(CSingleFilterTerminal)
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// COM_INTERFACE_ENTRY_CHAIN(CBaseTerminal)
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// END_COM_MAP()
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public:
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// Implementation: We know we have a single filter.
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CComPtr<IPin> m_pIPin;
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CComPtr<IBaseFilter> m_pIFilter;
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public:
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// ITCoreTerminal
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// the rest of this interface is implemented by CBaseTerminal
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// stops the rightmost render filter in the terminal
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// (needed for dynamic filter graphs)
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STDMETHOD(RunRenderFilter)(void);
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// stops the rightmost render filter in the terminal
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// (needed for dynamic filter graphs)
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STDMETHOD(StopRenderFilter)(void);
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// CBaseTerminal overrides for non-COM methods
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// AddFiltersToGraph cannot be implemented here because of the various
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// hacks regarding their names
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virtual HRESULT GetNumExposedPins(
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IN IGraphBuilder * pGraph,
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OUT DWORD * pdwNumPins
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);
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virtual HRESULT GetExposedPins(
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OUT IPin ** ppPins
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);
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virtual HRESULT RemoveFiltersFromGraph();
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};
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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// //
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// CSingleFilterStaticTerminal //
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// //
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// This is a base class for a static terminal with a single filter and //
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// pin. The terminal could be any direction or media type. //
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// //
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// //
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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class CSingleFilterStaticTerminal :
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public CSingleFilterTerminal
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{
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// If we add any additional interfaces to this class then
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// we must uncomment and expand the following.
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//
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// BEGIN_COM_MAP(CSingleFilterStaticTerminal)
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// COM_INTERFACE_ENTRY_CHAIN(CSingleFilterTerminal)
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// END_COM_MAP()
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public:
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// public because CreateTerminal and CMSPAddress::UpdateTerminalListForPnp accesses it
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CComPtr<IMoniker> m_pMoniker;
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// this flag allows CMSPAddress::UpdateTerminalListForPnp to perform a mark and sweep
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// on the terminal list
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BOOL m_bMark;
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//
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// Compares this terminal's moniker to pMoniker, returns S_OK if they match, S_FALSE if they don't
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//
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virtual HRESULT CompareMoniker(
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IMoniker *pMoniker
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);
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};
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#endif // _MSPTERM_H_
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