KSPROPSETID_Topology
Clients use requests in the KSPROPSETID_Topology property set to examine a KS filter's internal topology.
Each node in the topology has a zero-based node ID: KS filters with n nodes number them from 0 to n-1. The whole KS filter itself may be treated as a node and has the special node ID number KSFILTER_NODE.
Stream minidrivers do not need to handle the properties in this property set. The stream class driver handles them on behalf of the minidriver.
Microsoft defines a standard set of node types of the form KSNODETYPE_XXX in the ksmedia.h header file. When using the properties in this set, clients refer to a node by its zero-based index in this sequence.
The KSPROPSETID_Topology property set includes:
KSPROPERTY_TOPOLOGY_CATEGORIES
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