253 lines
6.3 KiB
C
253 lines
6.3 KiB
C
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/*++
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Copyright (c) 1998-1999 Microsoft Corporation
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Module Name:
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MSPCall.h
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Abstract:
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Definitions for CMSPCall class.
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--*/
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#ifndef __MSPCALL_H_
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#pragma option push -b -a8 -pc -A- /*P_O_Push*/
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#define __MSPCALL_H_
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/*++
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Class Description:
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Represents a active call that has media streams.
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--*/
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class ATL_NO_VTABLE CMSPCallBase :
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public CComObjectRootEx<CComMultiThreadModelNoCS>,
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public IDispatchImpl<ITStreamControl, &IID_ITStreamControl, &LIBID_TAPI3Lib>
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{
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public:
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// No need for free thread marshaling, because the MSP call object is
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// always aggregated by the TAPI3 call object.
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DECLARE_POLY_AGGREGATABLE(CMSPCallBase)
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BEGIN_COM_MAP(CMSPCallBase)
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COM_INTERFACE_ENTRY(IDispatch)
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COM_INTERFACE_ENTRY(ITStreamControl)
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END_COM_MAP()
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DECLARE_GET_CONTROLLING_UNKNOWN()
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DECLARE_VQI()
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CMSPCallBase();
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virtual ~CMSPCallBase();
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//
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// Private addref and release for the MSP call. See Platform SDK documentation.
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//
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virtual ULONG MSPCallAddRef (void) = 0;
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virtual ULONG MSPCallRelease (void) = 0;
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// ITStreamControl methods, called by the app.
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STDMETHOD (CreateStream) (
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IN long lMediaType,
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IN TERMINAL_DIRECTION Direction,
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IN OUT ITStream ** ppStream
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);
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STDMETHOD (EnumerateStreams) (
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OUT IEnumStream ** ppEnumStream
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);
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STDMETHOD (RemoveStream) (
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IN ITStream * pStream
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) = 0;
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STDMETHOD (get_Streams) (
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OUT VARIANT * pStreams
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);
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// methods called by the MSPAddress object.
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virtual HRESULT Init(
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IN CMSPAddress * pMSPAddress,
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IN MSP_HANDLE htCall,
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IN DWORD dwReserved,
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IN DWORD dwMediaType
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) = 0;
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virtual HRESULT ShutDown(
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) = 0;
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virtual HRESULT ReceiveTSPCallData(
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IN PBYTE pBuffer,
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IN DWORD dwSize
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);
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// methods called by the MSPstream object.
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HRESULT HandleStreamEvent(
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IN MSPEVENTITEM * EventItem
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) const;
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protected:
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virtual HRESULT InternalCreateStream(
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IN DWORD dwMediaType,
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IN TERMINAL_DIRECTION Direction,
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IN OUT ITStream ** ppStream
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) = 0;
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virtual HRESULT CreateStreamObject(
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IN DWORD dwMediaType,
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IN TERMINAL_DIRECTION Direction,
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IN IMediaEvent * pGraph,
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IN ITStream ** ppStream
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) = 0;
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protected:
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// The pointer to the address object. It is used to post events to TAPI3.
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// It also carries a refcount so that the address will not go away while
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// the call is still alive.
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CMSPAddress* m_pMSPAddress;
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// The handle to the call in TAPI3. Used in firing call events.
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MSP_HANDLE m_htCall;
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// The media type of this call. It is a bitmask of media types.
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DWORD m_dwMediaType;
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// The list of stream objects in the call.
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CMSPArray <ITStream *> m_Streams;
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// The lock that protects the stream lists.
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CMSPCritSection m_lock;
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};
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/*++
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Class Description:
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Represents a call that uses one DirectShow filter graph for each stream.
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--*/
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class ATL_NO_VTABLE CMSPCallMultiGraph : public CMSPCallBase
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{
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typedef struct
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{
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CMSPCallMultiGraph * pMSPCall;
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ITStream * pITStream;
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IMediaEvent * pIMediaEvent;
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} MSPSTREAMCONTEXT, *PMSPSTREAMCONTEXT;
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typedef struct _THREADPOOLWAITBLOCK
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{
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HANDLE hWaitHandle;
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MSPSTREAMCONTEXT * pContext;
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BOOL operator ==(struct _THREADPOOLWAITBLOCK &t)
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{
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return ((hWaitHandle == t.hWaitHandle)
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&& (pContext == t.pContext));
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}
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} THREADPOOLWAITBLOCK, *PTHREADPOOLWAITBLOCK;
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public:
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CMSPCallMultiGraph();
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virtual ~CMSPCallMultiGraph();
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// ITStreamControl methods (overriden)
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STDMETHOD (RemoveStream) (
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IN ITStream * ppStream
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);
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// methods called by the MSPAddress object. (overriden)
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HRESULT Init(
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IN CMSPAddress * pMSPAddress,
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IN MSP_HANDLE htCall,
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IN DWORD dwReserved,
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IN DWORD dwMediaType
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);
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HRESULT ShutDown(
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);
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// methods called by the thread pool
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static VOID NTAPI DispatchGraphEvent(
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IN VOID * pContext,
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IN BOOLEAN bFlag
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);
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virtual VOID HandleGraphEvent(
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IN MSPSTREAMCONTEXT * pContext
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);
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virtual HRESULT ProcessGraphEvent(
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IN ITStream * pITStream,
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IN long lEventCode,
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IN long lParam1,
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IN long lParam2
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);
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// methods of the CComObject
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void FinalRelease();
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protected:
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// helper function:
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HRESULT RegisterWaitEvent(
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IN IMediaEvent * pIMediaEvent,
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IN ITStream * pITStream
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);
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HRESULT UnregisterWaitEvent(
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IN int index
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);
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virtual HRESULT InternalCreateStream(
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IN DWORD dwMediaType,
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IN TERMINAL_DIRECTION Direction,
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IN OUT ITStream ** ppStream
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);
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protected:
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// The wait blocks store the information about the wait registered to
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// the thread pool. It includes the wait handles returned by the
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// RegisterWaitForSingleObject() call and a pointer to the context
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// structure. Each block in the array is for a graph in one of the
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// stream objects. The offset of a block in this array is the same
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// as the offset of the stream that owns the graph.
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CMSPArray <THREADPOOLWAITBLOCK> m_ThreadPoolWaitBlocks;
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};
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//
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// Event handling definitions.
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//
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typedef struct
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{
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CMSPCallMultiGraph * pCall;
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ITStream * pITStream;
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long lEventCode;
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long lParam1;
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long lParam2;
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} MULTI_GRAPH_EVENT_DATA;
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DWORD WINAPI AsyncMultiGraphEvent(LPVOID pVoid);
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#pragma option pop /*P_O_Pop*/
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#endif // __MSPCALL_H_
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