Re: [Discuss-gnuradio] gr_rational_resampler_base_XXX query

[Eric Blossom]

On Fri, Jun 12, 2009 at 10:47:11AM +0530, Jesuraj.V wrote:
> 
> Dear All,
> 
> I have a question in gr_rational_resampler_base_XXX.cc module.
> 
> 1. I got 2040 samples instead of 2048 or 2060 samples instead of 2048. Shall
> I use this module for interpolation and decimation? Or any other suitable
> module is available?
> 
> 2. In function 
> 
>  void
> 
> @NAME@::install_taps (const std::vector<@TAP_TYPE@> &taps)
> 
> {
> 
>   int nfilters = interpolation ();
>   int nt = taps.size () / nfilters;
> 
>   assert (nt * nfilters == (int) taps.size ());
> 
>   std::vector< std::vector <@TAP_TYPE@> > xtaps (nfilters);
> 
>   for (int n = 0; n < nfilters; n++)
>     xtaps[n].resize (nt);  
> 
>  
>   for (int i = 0; i < (int) taps.size(); i++)
>     xtaps[i % nfilters][i / nfilters] = taps[i];  ------------> How to
> calculate taps[i] value here. Any table or module?
> 
>   for (int n = 0; n < nfilters; n++)
>     d_firs[n]->set_taps (xtaps[n]);
>   
> 
>   set_history (nt);
>   d_updated = false;
> 
> Thanks in advance
> 
> Regards,
> Jesuraj

Please see gnuradio-core/src/python/gnuradio/blks2impl/rational_resampler.py

from gnuradio import gr, blks2

rr = blks2.rational_resampler_ccf(...)

Eric