[Discuss-gnuradio] generic LP/BP filters

[Marcus D. Leech]

For the "generic" LP/BP filter blocks, would it make sense for them to 
automatically select either a conventional FIR or FFT-fast-convolution 
filter,
  depending on the number of taps and other parameters?

The user still has access to the low-level implementations, but the 
choice between conventional FIR and fast convolution based on FFT is 
something that
  *could* be done whenever the filter parameters change, yes?

Furthermore when running a standard dot-product FIR filter, do we take 
advantage of the identities shown in this paper:

http://www.ws.binghamton.edu/fowler/fowler%20personal%20page/EE521_files/IV-05%20Polyphase%20FIlters_2007.pdf

Which allows you to avoid computations in a FIR that will never be used 
in the output?   Looking at the code, it *looks* like we do, but I'm
  not certain.


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org