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Re: [Discuss-gnuradio] new stream selector block in gr-basic

From: Khalid Jamil
Subject: Re: [Discuss-gnuradio] new stream selector block in gr-basic
Date: Fri, 18 Nov 2011 13:01:46 +0300


This is great work.
I updated my Gnu Radio to the latest code using Marcus build-gnuradio script but I did not get this new selector block.
Can someone please explain me how can I integrate this new selector block into my gnuradio/GRC installation on Ubuntu.



Josh Blum wrote in post #1031824:
> Hey list,
> I have noticed that many user's have found the need to mux a stream.
> Either to dynamically select an alternative data source or to mux an
> output to an alternative sink like a different demodulator.
> Currently, GRC has come with selector (and valve). These blocks
> implement stream muxing by dynamically reconfiguring the flow graph.
> However, this method seems to be slow and error prone.
> So, I have created a stream selector block in gr-basic. Stream selector
> has N inputs and M outputs and allows the user to dynamically change the
> stream routing without flow graph reconfiguration.
> The good:
> - the switchover is immediate
> - no lock/unlock start/stop, so no errors
> - unused inputs can be put into blocking or consume mode
> The bad:
> - The post-reconfiguration overhead is an extra memcpy from source port
> to destination port
> The work is here, and grc demo attached:
> -Josh

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