SOPC builder "Using mux"

Hi,

How is it possible in Altera SOPC builder to do demultiplexing/multiplexing tasks?

Currently I'm developing video system and want to implement built-in algorithm like Median filter. I want to work the filter e.g. when SW[0] = 1 and disable it, when SW[0] = 0. I've found that Altera has its Avalon-ST mux/demux, but I didn't discover how to connect control signal for mux/demux.

Thanks in advance,

Wony