Re: [Discuss-gnuradio] Rearranging a running flow graph

[Josh Blum]

Eric Blossom wrote:
> On Mon, Apr 16, 2007 at 11:51:09AM +0200, Trond Danielsen wrote:
> > 2007/3/17, Josh Blum <address@hidden>:
> > > I think gnuradio needs a mux and a demux block. A mux has N inputs and a
> > > set_n method. The mux will only feed the output with the nth input
> > > stream (throw out/ignore the other inputs). A demux has N outputs and a
> > > set_n method. The demux will only feed the nth output with the input 
> > > stream.
> > Has anybody written something like this allready?
>
> No.  
>
> I think this should be implemented using the work-in-progress
> that Johnathan's doing for hier_block2.  It may be about a week too
> early to use ;)

How would you go about doing this? I had thought that one could use a 
bunch of message sources and sinks, and a thread could facilitate data 
transfer for only one source-sink pair. But how could several blocks 
with single inputs appear as one block with multiple inputs? Seems like 
trouble...

-------

On another note: The original problem was trying to toggle a section of 
a running flow graph on and off. The gr.skiphead seems to be able to do 
this by starving the data stream for the first n samples. Could there be 
a gr.valve block that can starve a data stream based on a boolean flag? 
The flag could set by an open/close method (or something to that effect).

Or a block like this exists and I missed it?

-Josh

> Eric
>
>
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