On Fri, Sep 21, 2012 at 1:18 PM, cjpatton <cjpat...@ucdavis.edu> wrote:
> Tom and Kyle,
>
> Thanks for your replies. Suppose I want in[0] to refer to the beginning of
> the new data. Then I could do this:
>
> const float *in = (const float *) input_items[history()-1];
>
> So in[noutput_items-1] is the last? Thanks!
>
> Chris
Chris,
Close. Remember that input_buffers is a vector of buffers. So you want
the first buffer and then offset it. I think this should work:
> const float *in = (const float *)(&input_items[0][history()-1]);
A good one to look at is the gr_quadrature_demod_cf block where the
history is set to 2 and the work function has:
const float *in = (const float *) input_items[0];
in++;
So the 'in++' sets the pointer forward that one sample so that in[i-1] is valid.
Tom
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