MontiVision DirectShow SDK Documentation

The IMVSCFilterGraph Interface from the MontiVision Smart Control provides methods to load and handle a filter graph configuration. This interface is the starting point for every video application developed with the MontiVision Smart Control. Look also at the IMVSCFilterGraph2 interface for more filter graph methods.

Methods:

ExportFilterGraph	Enables the export of the filter graph to the Running Object Table. Use this to debug your application with the MontiVision Workbench Connect to Graph function.
FilterGraphManager	Returns the IUnknown Interface from the filter graph manager.
GetFilter	Get an interface pointer from a filter.
LoadConfig	Opens a project file and creates a filter graph.
Pause	Pauses the current filter graph.
SaveConfig	Saves the current filter graph into the project file. Call this method if you have changed the properties of a filter or modified the filter graph (and wish to save these changes).
Start	Starts the current filter graph.
State	Current filter graph state.
Stop	Stops the current filter graph.
UnloadConfig	The UnLoadConfig method removes a filter configuration from the control. The control is restored to its initial state.

Typelib: MV SmartControl

Property IMVSCFilterGraph::ExportFilterGraph

Declaration: Property Get/Put ExportFilterGraph As Boolean
Enables the export of the filter graph to the Running Object Table. Use this to debug your application with the MontiVision Workbench Connect to Graph function.
Prototype:
HRESULT put_ExportFilterGraph(BOOL Enable);
HRESULT get_ExportFilterGraph(BOOL* Enable);

Property IMVSCFilterGraph::FilterGraphManager

Declaration: Property Get FilterGraphManager As Unknown
Returns the IUnknown Interface from the filter graph manager..
Prototype:
HRESULT get_FilterGraphManager(IUnknown** FMG);

Method IMVSCFilterGraph::GetFilter

Declaration: Function GetFilter(Label As String) As Unknown
Get an interface pointer from a filter.

Parameter:

Label Filter label within the filter graph configuration.

Prototype:
HRESULT GetFilter(BSTR Label, IUnknown** Filter);

Method IMVSCFilterGraph::LoadConfig

Declaration: Sub LoadConfig(Path As String)
Opens a MontiVision Project File (*.mvP) and creates a filter graph. Instead of the MontiVision Project File LoadConfig can open media files, e.g. AVI files, or files from the GraphEdit tool from the DirectShow SDK.

Parameter:

Path Path of the MontiVision Project File (*.mvp).

Prototype:
HRESULT LoadConfig(BSTR Path);

Method IMVSCFilterGraph::Pause

Declaration: Sub Pause
Pauses the current filter graph.
Prototype:
HRESULT Pause();

Method IMVSCFilterGraph::SaveConfig

Declaration: Sub SaveConfig
Saves the current filter graph into the project file. Call this method if you have changed the properties of a filter or modified the filter graph (and wish to save these changes).
Prototype:
HRESULT SaveConfig();

Method IMVSCFilterGraph::Start

Declaration: Sub Start
Starts the current filter graph.
Prototype:
HRESULT Start();

Property IMVSCFilterGraph::State

Declaration: Property Get State As Long
Current filter graph state.

State Value

STATE_STOP 0

STATE_PAUSE 1

STATE_RUN 2

Parameter:

State Contains the current state of the filter graph.

Prototype:
HRESULT get_State(LONG* State);

Method IMVSCFilterGraph::Stop

Declaration: Sub Stop
Stops the current filter graph.
Prototype:
HRESULT Stop();

Method IMVSCFilterGraph::UnloadConfig

Declaration: Sub UnloadConfig
The UnloadConfig method removes a filter configuration from the control. The control is restored to its initial state.
Prototype:
HRESULT UnloadConfig();