If the delayed signal is optional, why not just use a delay block when you
need a delayed signal?
[your_source]--+-->[do_stuff]-------------------+
| | ____________
| +-->[ something ]
| | that uses
|-->[output]
| +-->[_both_paths_]
| |
+-->[delay]--->[do_other_stuff]--+
On Wed, Dec 16, 2015 at 2:40 PM, Charles Bridger <[email protected]>
wrote:
> I've created a signal source and want to create a second port which
> outputs the same signal, except one sample behind. The problem I'm having
> is that I don't know how to make it "optional". If I change the code in the
> private constructor from:
>
>
> [Constructor Code}
> ...
> gr::io_signature::make(1,1,sizeof(float)),
> ....
>
> to
>
> gr::io_signature::make(1,2,sizeof(float)),
>
> It still makes me plug something into the port when I use the block in
> GRC, even when I don't want to use the second output port.
>
> I don't know if my code in the work method is relevant but I address the
> tw output ports like this:
>
> float *out0 = (float *) output_items[0];
> float *out1 = (float *) output_items[1];
>
> for(int i = 0; i < noutput_items; i++)
> {
> out0[i] = stuff;
> out1[i] = stuff - 1; // <- I want that to be optional when I put the
> block in GRC.
> }
>
> I've also tried setting the io_signature::make to 1,-1,sizeof(float) but
> that's less than ideal and doesn't work if in GRC i set number of outputs
> to 1.
>
> Again thank you all for your time.
>
> Cheers,
> Charles
>
> _______________________________________________
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>
>
--
GDB has a 'break' feature; why doesn't it have 'fix' too?
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