[TUNER]
	set gain
	set autogain
	config frequency
	choose device
	read samples
[FILTER]
	basic bandpass filter
[DRAW]
	draw in SDL/OpenGL waterfall
	output data to web
[CORE]
	multi threaded
	read IQ thread
	processing thread
	config thread?
	log utilities
[MOD]
	fm demod
	wbfn demod
	am demod
[AUDIO]
	play sound
	stream sound to web