Camera Application!!

When I use mobile 5.0, It have a buildin Camera application (Picture). But We
don't have any the AP's source code. I only know it is constructed by
DirectShow with capture, transform, and renderer filter and 3 stream
path(preview, capture, still). If we want to add a HW Image processor which
deal with capture and still stand alone. In no the AP's source code
situation, do I have any way to skip the capture and still stream path, or
have any other idea?