[Discuss-gnuradio] Waterfall display

[David Carr]

Hi all,

I've been doing a bit of python hacking in an attempt to get some sort 
of "waterfall" / spectrogram type display working.  Currently I have a 
very crude bit of python that works -- sorta.  The biggest issue is that 
its slow and its only going to get slower.

I'm curious about the best way to implement the "persistence:" part of 
the display.  It seems wasteful to have to store all previous data on 
(now on screen) in order to be able to redraw everything.  Is there a 
less memory and time expensive way to handle the scrolling type behavior? 

I'm fishing for helpful tidbits/good architectural ideas... if you have 
any ideas about how this should work send them my way.

-David Carr