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Re: [Discuss-gnuradio] block consuming input if there is no output?

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] block consuming input if there is no output?
Date: Thu, 4 May 2006 03:46:28 -0700
User-agent: Mutt/1.5.9i

On Wed, May 03, 2006 at 04:37:49PM -0400, Chuck Swiger wrote:
> Will a 2.x block consume an input stream if it returns 0 output items?

Yes,  if it's based on gr_block and you call consume or consume_each
in general_work.

> All the other atsc blocks are at least passing data and reporting
> various states, but fsd = atsc.field_sync_demux() seems to be hung up.
> An upstream block connected to fsd, when also connected to a file sink
> only produces 28672 (7 * 4096) in the file.  fsd, as copied from
> gr 0.9 does not produce output untill a field sync is detected.
> It is searching thru data, but it looks like it's just going
> thru the input_tags[ii] array off to infinity, i.e, 

> cerr << "atsc_field_sync_demux: searching for sync at "
>      << inputs0_index + ii << endl;
> just counts up.
> File attached.
> Also I'm now using the 0.9 atsc_tx to create test data (20Msps shorts
> centered at 5.75MHz), instead of "off the air".
> --Chuck


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