IDistributorNotify::NotifyGraphChange
A version of this page is also available for
4/8/2010
This method is called when the set of filters in the filter graph change or their connections change.
Syntax
HRESULT NotifyGraphChange( );
Parameters
None.
Return Value
Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.
| Value | Description |
|---|---|
E_FAIL |
Failure. |
E_POINTER |
Null pointer argument. |
E_INVALIDARG |
Invalid argument. |
E_NOTIMPL |
Method is not supported. |
S_OK or NOERROR |
Success. |
Remarks
This method is called whenever an FilterGraph::AddFilter, IFilterGraph::RemoveFilter, or IFilterGraph::ConnectDirect method is called or a method is called that will lead to one of these being called (such as IGraphBuilder::RenderFile).
Make sure you use Release on any held filters that have been removed at this point.
For performance reasons, PIDs might choose not to rescan the filters until the PIDs need the interfaces, because there might be several separate notifications sent. However, it is important to release cached interfaces immediately.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |