[Discuss-gnuradio] script flow issue with open pipes

[cswiger]

re: my psk31 script flow issue with open pipes:

>From what I can tell, gnuradio works great with existing data
files, we can open files and feed the data to bytes_to_syms and
go from there. However the problem occurs with data being
real-time generated and fed thru an open pipe. Apperently the
open ended unknown size of the incoming data causes a problem,
even if it's arriving fast enough.

My solution to the psk31 issue was to loop it thru the sound card.
One script reads the keyboard and creates data, another script
reads the reads the data and creates the audio, and a 3rd script
reads the audio and creates rf. As soon as I put a pipe in place
of the audio it hangs up again.

Q: Would it be possible to trivially mung an existing block to
patch in a random or event driven source? That is, it would
take an input and feed it straight to output, but still produce
a null or zero output even if input is stopped, so that downstream
blocks aren't hung up?

Just a thought from the shower.

--Chuck