Playing Mutltimedia Graph


I have developed a parser & decoder plugin & tried to attach in the following way


When I play the graph, I am seeing that “writer” is calling “NextBuffer” of “Decoder”. & I suppose I should call NextBuffer of “Parser” in Decoder’s NextBuffer. Am I right ??

Can anybody tell me the exact sequence of function calls(plugin inerface defination) called in the above graph upon start/resuming the graph.

Thanks in advance,