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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