Re: [Discuss-gnuradio] floats over UDP into GRC?

[Marcus D. Leech]

> I'm producing the stream in C++ (using openFrameworks) and sending the data as 
> char arrays,
> and have confirmed that this is indeed all that is being sent (e.g. "1.25")…
So, you're sending them in ASCII?  As ASCII strings?

GRC/gnuradio has no method for dealing with that.  The UDP block assumes 
native machine-binary format for data coming in
  over UDP.  Doing it in ASCII (Or Unicode, or whatever) strings will 
be hugely inefficient, both in terms of bandwidth required--
  it takes many more bytes to represent a floating-point number in 
ASCII, than in the native binary format, and converting from
  strings back into the native binary format is also quite expensive. 
 Since UDP is entirely binary transparent, there's no reason
  to send them as ascii strings.  The only thing you have to watch out 
for is if the raw floating-point format between your two
  machines is different.  But between x86-family machines, it's all the 
same.



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