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//------------------------------------------------------------------------------
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// File: DynGraph.idl
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//
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// Desc: Dynamic graph interfaces.
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//
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// Copyright (c) 1999 - 2000, Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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interface IPinConnection;
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interface IPinFlowControl;
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interface IGraphConfig;
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interface IGraphConfigCallback;
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//--------------------------------------------------------------------
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//
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// IPinConnection - supported by input pins
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//
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//--------------------------------------------------------------------
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[
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local,
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object,
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uuid(4a9a62d3-27d4-403d-91e9-89f540e55534),
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pointer_default(unique)
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]
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interface IPinConnection : IUnknown {
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// Do you accept this type chane in your current state?
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HRESULT DynamicQueryAccept([in] const AM_MEDIA_TYPE *pmt);
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// Set event when EndOfStream receive - do NOT pass it on
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// This condition is cancelled by a flush or Stop
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HRESULT NotifyEndOfStream([in] HANDLE hNotifyEvent);
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// Are you an 'end pin'
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HRESULT IsEndPin();
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HRESULT DynamicDisconnect();
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};
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//--------------------------------------------------------------------
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//
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// IPinFlowControl - supported by output pins
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//
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//--------------------------------------------------------------------
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[
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local,
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object,
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uuid(c56e9858-dbf3-4f6b-8119-384af2060deb),
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pointer_default(unique)
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]
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interface IPinFlowControl : IUnknown {
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// Block processing on this pin
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HRESULT Block([in] DWORD dwBlockFlags, [in] HANDLE hEvent);
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}
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// block flags
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enum _AM_PIN_FLOW_CONTROL_BLOCK_FLAGS {
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AM_PIN_FLOW_CONTROL_BLOCK = 0x00000001, // 0 means unblock
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};
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// Reconnect flags
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typedef enum _AM_GRAPH_CONFIG_RECONNECT_FLAGS {
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AM_GRAPH_CONFIG_RECONNECT_DIRECTCONNECT = 0x00000001,
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AM_GRAPH_CONFIG_RECONNECT_CACHE_REMOVED_FILTERS = 0x00000002,
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AM_GRAPH_CONFIG_RECONNECT_USE_ONLY_CACHED_FILTERS = 0x00000004
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} AM_GRAPH_CONFIG_RECONNECT_FLAGS;
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// RemoveFilterEx flags
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enum _REM_FILTER_FLAGS {
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REMFILTERF_LEAVECONNECTED = 0x00000001
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};
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typedef enum _AM_FILTER_FLAGS {
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AM_FILTER_FLAGS_REMOVABLE = 0x00000001
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} AM_FILTER_FLAGS;
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//--------------------------------------------------------------------
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//
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// IGraphConfig
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//
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//--------------------------------------------------------------------
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[
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local,
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object,
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uuid(03A1EB8E-32BF-4245-8502-114D08A9CB88),
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pointer_default(unique)
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]
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interface IGraphConfig : IUnknown {
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HRESULT Reconnect([in] IPin *pOutputPin,
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[in] IPin *pInputPin,
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[in] const AM_MEDIA_TYPE *pmtFirstConnection,
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[in] IBaseFilter *pUsingFilter, // can be NULL
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[in] HANDLE hAbortEvent,
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[in] DWORD dwFlags);
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HRESULT Reconfigure([in] IGraphConfigCallback *pCallback,
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[in] PVOID pvContext,
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[in] DWORD dwFlags,
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[in] HANDLE hAbortEvent);
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HRESULT AddFilterToCache([in] IBaseFilter *pFilter);
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HRESULT EnumCacheFilter([out] IEnumFilters **pEnum);
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HRESULT RemoveFilterFromCache([in]IBaseFilter *pFilter);
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// Get the start time associated with the last Run() call
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// If the graph is not running returns VFW_E_WRONG_STATE
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HRESULT GetStartTime([out] REFERENCE_TIME *prtStart);
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HRESULT PushThroughData(
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[in] IPin *pOutputPin,
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[in] IPinConnection *pConnection,
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[in] HANDLE hEventAbort);
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HRESULT SetFilterFlags([in] IBaseFilter *pFilter, [in] DWORD dwFlags);
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HRESULT GetFilterFlags([in] IBaseFilter *pFilter, [out] DWORD *pdwFlags);
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HRESULT RemoveFilterEx( [in] IBaseFilter *pFilter, DWORD Flags );
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}
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//--------------------------------------------------------------------
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//
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// IGraphConfigCallback
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//
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//--------------------------------------------------------------------
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[
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local,
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object,
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uuid(ade0fd60-d19d-11d2-abf6-00a0c905f375),
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pointer_default(unique)
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]
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interface IGraphConfigCallback : IUnknown
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{
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HRESULT Reconfigure(PVOID pvContext, DWORD dwFlags);
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}
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// Filter Chain Definition
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//
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// Filter chains have the following properties:
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//
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// - Each filter chain has one or more filters.
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//
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// - Each filter in a filter chain has at most one connected input pin and one
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// connected output pin. For example, filters A, C, D, F, G, H, I, J and K
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// (see the diagram below) can be in a filter chain because each one has at
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// most one connected input pin and one connected output pin.
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//
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// - Any filter in a chain is reachable by any other filter in the chain.
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// For example, in the filter chain F-G-H, F can reach H by following the F-
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// G connection to G and then following the G-H connection to H. Filters F
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// and J cannot be in the same filter chain because J is not reachable from
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// F. Anotherwords, there no sequence of connected filters between F and J.
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//
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// - The start filter is the only filter in the filter chain who's input
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// pin is not connected to another filter in the chain. For instance, F is
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// the start filter in F-G-H because F's input pin is connected to E and E
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// is not in the filter chain. G's input pin is connected to F and H's is
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// connected to G. Both F and G are in the filter chain.
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//
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// - The end filter is the only filter in the filter chain who's output pin
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// is not connected to another filter in the chain. For example, in the
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// filter chain J-K, K is the end filter because K's output pin is
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// connected to L. J's output pin is connected to K and K is in the J-K
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// filter chain.
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//
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//
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// --->|---| |---|--->
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// | C |--->| D |
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// |---| |---|--->|---| |---|--->|---| |---| |---| |---|
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// | A |--->| B | | E |--->| F |--->| G |--->| H |
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// |---| |---|--->|---|------------>|---| |---| |---| |---|
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// | I |--->
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// --->|---|--->
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//
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// |---| |---| |---|
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// | J |--->| K |--->| L |
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// |---| |---| |---|
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//
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// Example Filter Graph
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//
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//
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//
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// IFilterChain Methods Documentation
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//
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// HRESULT StartChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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//
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// StartChain() switches all the filters in the chain into the running state
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// If one of the filters will not switch to the running state, then all the filters
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// in the chain are stopped. This method can only be called if the filter graph is
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// running.
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//
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// Parameters:
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// - pStartFilter [in]
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// The first filter in the filter chain. Note that this can be the same
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// filter as pEndFilter .
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//
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// - pEndFilter [in]
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// The last filter in the filter chain. Note that this can be the same
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// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
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// from pStartFilter to the last downstream filter which can be in a filter chain.
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// For example, IFilterChain::StartChain( A, NULL ) would start filter A.
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// IFilterChain::StartChain( G, NULL ) would start filters G and H.
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// IFilterChain::StartChain( C, NULL ) would start filters C and D. Finally,
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// IFilterChain::StartChain( E, NULL ) would fail because E cannot be in a
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// filter chain (see the Filter Chain Definition section for more information).
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//
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// Return Value:
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// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
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// information on interpreting HRESULTs.
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//
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//
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//
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//
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// HRESULT PauseChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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//
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// PauseChain() switches all the filters in a chain to the paused state. If it cannot
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// switch one of the filtres into the paused state, all the filters in the chain are
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// stopped. This method can only be called if the filter graph is paused.
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//
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// Parameters:
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// - pStartFilter [in]
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// The first filter in the filter chain. Note that this can be the same
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// filter as pEndFilter .
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//
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// - pEndFilter [in]
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// The last filter in the filter chain. Note that this can be the same
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// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
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// from pStartFilter to the last downstream filter which can be in a filter chain.
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// For example, IFilterChain::StopChain( A, NULL ) would stop filter A.
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// IFilterChain::StopChain( G, NULL ) would stop filters G and H.
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// IFilterChain::StopChain( C, NULL ) would stop filters C and D. Finally,
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// IFilterChain::StopChain( E, NULL ) would fail because E cannot be in a filter
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// chain (see the Filter Chain Definition section for more information).
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//
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//
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// Return Value:
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// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
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// information on interpreting HRESULTs.
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//
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//
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//
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// HRESULT StopChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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//
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// StopChain() switches all the filters in chain to the stopped state.
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//
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// Parameters:
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// - pStartFilter [in]
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// The first filter in the filter chain. Note that this can be the same
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// filter as pEndFilter .
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//
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// - pEndFilter [in]
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// The last filter in the filter chain. Note that this can be the same
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// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
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// from pStartFilter to the last downstream filter which can be in a filter chain.
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// For example, IFilterChain::StopChain( A, NULL ) would stop filter A.
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// IFilterChain::StopChain( G, NULL ) would stop filters G and H.
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// IFilterChain::StopChain( C, NULL ) would stop filters C and D. Finally,
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// IFilterChain::StopChain( E, NULL ) would fail because E cannot be in a filter
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// chain (see the Filter Chain Definition section for more information).
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//
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//
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// Return Value:
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// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
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// information on interpreting HRESULTs.
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//
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//
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//
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//
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//
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// HRESULT RemoveChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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//
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// RemoveChain() removes every filter in a chain from the filter graph.
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// The filters can be removed while the graph is running.
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//
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// Parameters:
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// - pStartFilter [in]
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// The first filter in the filter chain. Note that this can be the same
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// filter as pEndFilter .
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//
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// - pEndFilter [in]
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// The last filter in the filter chain. Note that this can be the same
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// filter as pStartFilter. If pEndFilter is NULL then the filter chain
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// extends from pStartFilter to the last downstream filter which can be in a
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// filter chain. For example, IFilterChain::RemoveChain( A, NULL ) would remove
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// filter A from the filter graph. IFilterChain::RemoveChain( G, NULL ) would
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// remove filters G and H. IFilterChain::RemoveChain( C, NULL ) would remove
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// filters C and D. Finally, IFilterChain::RemoveChain( E, NULL ) would fail
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// because E cannot be in a filter chain (see the Filter Chain Definition
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// section for more information).
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//
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//
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// Return Value:
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// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
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// information on interpreting HRESULTs.
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//
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//
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[
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local,
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object,
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uuid(DCFBDCF6-0DC2-45f5-9AB2-7C330EA09C29),
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pointer_default(unique)
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]
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interface IFilterChain : IUnknown
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{
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HRESULT StartChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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HRESULT PauseChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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HRESULT StopChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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HRESULT RemoveChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
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}
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