By default, the filter graph manager does not forward this event to the application. However, after all the streams in the graph report EC_COMPLETE, the filter graph manager posts a separate EC_COMPLETE event to the application.
If the default action is disabled for this event, the application receives all of the EC_COMPLETE events from the renderers.
A renderer filter sends this event when it receives an end-of-stream notice. (End-of-stream is signaled through the IPin::EndOfStream method.) The filter sends exactly one EC_COMPLETE event for each stream. The filter must process any pending samples before it sends the event. Stopping a renderer resets any end-of-stream state that was cached.
