//------------------------------------------------------------------------------
// File: DynGraph.idl
//
// Desc: Dynamic graph interfaces
//
// Copyright (c) 1999-2002, Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
interface IPinConnection;
interface IPinFlowControl;
interface IGraphConfig;
interface IGraphConfigCallback;
//--------------------------------------------------------------------
//
// IPinConnection - supported by input pins
//
//--------------------------------------------------------------------
[
local,
object,
uuid(4a9a62d3-27d4-403d-91e9-89f540e55534),
pointer_default(unique)
]
interface IPinConnection : IUnknown {
// Do you accept this type chane in your current state?
HRESULT DynamicQueryAccept([in] const AM_MEDIA_TYPE *pmt);
// Set event when EndOfStream receive - do NOT pass it on
// This condition is cancelled by a flush or Stop
HRESULT NotifyEndOfStream([in] HANDLE hNotifyEvent);
// Are you an 'end pin'
HRESULT IsEndPin();
HRESULT DynamicDisconnect();
};
//--------------------------------------------------------------------
//
// IPinFlowControl - supported by output pins
//
//--------------------------------------------------------------------
[
local,
object,
uuid(c56e9858-dbf3-4f6b-8119-384af2060deb),
pointer_default(unique)
]
interface IPinFlowControl : IUnknown {
// Block processing on this pin
HRESULT Block([in] DWORD dwBlockFlags, [in] HANDLE hEvent);
}
// block flags
enum _AM_PIN_FLOW_CONTROL_BLOCK_FLAGS {
AM_PIN_FLOW_CONTROL_BLOCK = 0x00000001, // 0 means unblock
};
// Reconnect flags
typedef enum _AM_GRAPH_CONFIG_RECONNECT_FLAGS {
AM_GRAPH_CONFIG_RECONNECT_DIRECTCONNECT = 0x00000001,
AM_GRAPH_CONFIG_RECONNECT_CACHE_REMOVED_FILTERS = 0x00000002,
AM_GRAPH_CONFIG_RECONNECT_USE_ONLY_CACHED_FILTERS = 0x00000004
} AM_GRAPH_CONFIG_RECONNECT_FLAGS;
// RemoveFilterEx flags
enum _REM_FILTER_FLAGS {
REMFILTERF_LEAVECONNECTED = 0x00000001
};
typedef enum _AM_FILTER_FLAGS {
AM_FILTER_FLAGS_REMOVABLE = 0x00000001
} AM_FILTER_FLAGS;
//--------------------------------------------------------------------
//
// IGraphConfig
//
//--------------------------------------------------------------------
[
local,
object,
uuid(03A1EB8E-32BF-4245-8502-114D08A9CB88),
pointer_default(unique)
]
interface IGraphConfig : IUnknown {
HRESULT Reconnect([in] IPin *pOutputPin,
[in] IPin *pInputPin,
[in] const AM_MEDIA_TYPE *pmtFirstConnection,
[in] IBaseFilter *pUsingFilter, // can be NULL
[in] HANDLE hAbortEvent,
[in] DWORD dwFlags);
HRESULT Reconfigure([in] IGraphConfigCallback *pCallback,
[in] PVOID pvContext,
[in] DWORD dwFlags,
[in] HANDLE hAbortEvent);
HRESULT AddFilterToCache([in] IBaseFilter *pFilter);
HRESULT EnumCacheFilter([out] IEnumFilters **pEnum);
HRESULT RemoveFilterFromCache([in]IBaseFilter *pFilter);
// Get the start time associated with the last Run() call
// If the graph is not running returns VFW_E_WRONG_STATE
HRESULT GetStartTime([out] REFERENCE_TIME *prtStart);
HRESULT PushThroughData(
[in] IPin *pOutputPin,
[in] IPinConnection *pConnection,
[in] HANDLE hEventAbort);
HRESULT SetFilterFlags([in] IBaseFilter *pFilter, [in] DWORD dwFlags);
HRESULT GetFilterFlags([in] IBaseFilter *pFilter, [out] DWORD *pdwFlags);
HRESULT RemoveFilterEx( [in] IBaseFilter *pFilter, DWORD Flags );
}
//--------------------------------------------------------------------
//
// IGraphConfigCallback
//
//--------------------------------------------------------------------
[
local,
object,
uuid(ade0fd60-d19d-11d2-abf6-00a0c905f375),
pointer_default(unique)
]
interface IGraphConfigCallback : IUnknown
{
HRESULT Reconfigure(PVOID pvContext, DWORD dwFlags);
}
// Filter Chain Definition
//
// Filter chains have the following properties:
//
// - Each filter chain has one or more filters.
//
// - Each filter in a filter chain has at most one connected input pin and one
// connected output pin. For example, filters A, C, D, F, G, H, I, J and K
// (see the diagram below) can be in a filter chain because each one has at
// most one connected input pin and one connected output pin.
//
// - Any filter in a chain is reachable by any other filter in the chain.
// For example, in the filter chain F-G-H, F can reach H by following the F-
// G connection to G and then following the G-H connection to H. Filters F
// and J cannot be in the same filter chain because J is not reachable from
// F. Anotherwords, there no sequence of connected filters between F and J.
//
// - The start filter is the only filter in the filter chain who's input
// pin is not connected to another filter in the chain. For instance, F is
// the start filter in F-G-H because F's input pin is connected to E and E
// is not in the filter chain. G's input pin is connected to F and H's is
// connected to G. Both F and G are in the filter chain.
//
// - The end filter is the only filter in the filter chain who's output pin
// is not connected to another filter in the chain. For example, in the
// filter chain J-K, K is the end filter because K's output pin is
// connected to L. J's output pin is connected to K and K is in the J-K
// filter chain.
//
//
// --->|---| |---|--->
// | C |--->| D |
// |---| |---|--->|---| |---|--->|---| |---| |---| |---|
// | A |--->| B | | E |--->| F |--->| G |--->| H |
// |---| |---|--->|---|------------>|---| |---| |---| |---|
// | I |--->
// --->|---|--->
//
// |---| |---| |---|
// | J |--->| K |--->| L |
// |---| |---| |---|
//
// Example Filter Graph
//
//
//
// IFilterChain Methods Documentation
//
// HRESULT StartChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
//
// StartChain() switches all the filters in the chain into the running state
// If one of the filters will not switch to the running state, then all the filters
// in the chain are stopped. This method can only be called if the filter graph is
// running.
//
// Parameters:
// - pStartFilter [in]
// The first filter in the filter chain. Note that this can be the same
// filter as pEndFilter .
//
// - pEndFilter [in]
// The last filter in the filter chain. Note that this can be the same
// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
// from pStartFilter to the last downstream filter which can be in a filter chain.
// For example, IFilterChain::StartChain( A, NULL ) would start filter A.
// IFilterChain::StartChain( G, NULL ) would start filters G and H.
// IFilterChain::StartChain( C, NULL ) would start filters C and D. Finally,
// IFilterChain::StartChain( E, NULL ) would fail because E cannot be in a
// filter chain (see the Filter Chain Definition section for more information).
//
// Return Value:
// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
// information on interpreting HRESULTs.
//
//
//
//
// HRESULT PauseChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
//
// PauseChain() switches all the filters in a chain to the paused state. If it cannot
// switch one of the filtres into the paused state, all the filters in the chain are
// stopped. This method can only be called if the filter graph is paused.
//
// Parameters:
// - pStartFilter [in]
// The first filter in the filter chain. Note that this can be the same
// filter as pEndFilter .
//
// - pEndFilter [in]
// The last filter in the filter chain. Note that this can be the same
// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
// from pStartFilter to the last downstream filter which can be in a filter chain.
// For example, IFilterChain::StopChain( A, NULL ) would stop filter A.
// IFilterChain::StopChain( G, NULL ) would stop filters G and H.
// IFilterChain::StopChain( C, NULL ) would stop filters C and D. Finally,
// IFilterChain::StopChain( E, NULL ) would fail because E cannot be in a filter
// chain (see the Filter Chain Definition section for more information).
//
//
// Return Value:
// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
// information on interpreting HRESULTs.
//
//
//
// HRESULT StopChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
//
// StopChain() switches all the filters in chain to the stopped state.
//
// Parameters:
// - pStartFilter [in]
// The first filter in the filter chain. Note that this can be the same
// filter as pEndFilter .
//
// - pEndFilter [in]
// The last filter in the filter chain. Note that this can be the same
// filter as pStartFilter. If pEndFilter is NULL then the filter chain extends
// from pStartFilter to the last downstream filter which can be in a filter chain.
// For example, IFilterChain::StopChain( A, NULL ) would stop filter A.
// IFilterChain::StopChain( G, NULL ) would stop filters G and H.
// IFilterChain::StopChain( C, NULL ) would stop filters C and D. Finally,
// IFilterChain::StopChain( E, NULL ) would fail because E cannot be in a filter
// chain (see the Filter Chain Definition section for more information).
//
//
// Return Value:
// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
// information on interpreting HRESULTs.
//
//
//
//
//
// HRESULT RemoveChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
//
// RemoveChain() removes every filter in a chain from the filter graph.
// The filters can be removed while the graph is running.
//
// Parameters:
// - pStartFilter [in]
// The first filter in the filter chain. Note that this can be the same
// filter as pEndFilter .
//
// - pEndFilter [in]
// The last filter in the filter chain. Note that this can be the same
// filter as pStartFilter. If pEndFilter is NULL then the filter chain
// extends from pStartFilter to the last downstream filter which can be in a
// filter chain. For example, IFilterChain::RemoveChain( A, NULL ) would remove
// filter A from the filter graph. IFilterChain::RemoveChain( G, NULL ) would
// remove filters G and H. IFilterChain::RemoveChain( C, NULL ) would remove
// filters C and D. Finally, IFilterChain::RemoveChain( E, NULL ) would fail
// because E cannot be in a filter chain (see the Filter Chain Definition
// section for more information).
//
//
// Return Value:
// An HRESULT. See the Direct Show SDK and COM SDK documentation for more
// information on interpreting HRESULTs.
//
//
[
local,
object,
uuid(DCFBDCF6-0DC2-45f5-9AB2-7C330EA09C29),
pointer_default(unique)
]
interface IFilterChain : IUnknown
{
HRESULT StartChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
HRESULT PauseChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
HRESULT StopChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
HRESULT RemoveChain( [in] IBaseFilter *pStartFilter, [in] IBaseFilter *pEndFilter );
}
