Re: [Discuss-gnuradio] updating abstract classes

[Ilia Mirkin]

Quoting Charles Swiger <address@hidden>:

> On Wed, 2006-04-26 at 17:53 -0700, Eric Blossom wrote:
>
> > Hi Ilia,
> > Thanks for diving in.
> >
> > Chuck,
> >
> > After taking a look at the 0.9 code (atsc_rx.cc), it looks like we were
> > instantiating atsci_equalizer_lms.
> >
> > atsci_equalizer_lms uses a single FIR filter.
> >
> > atsci_equalizer_lms2 uses feedback and feedforward.  Not sure we ever
> > got it sorted out.
>
> That's even more confusing ;)   I'm working from GrAtscEqualizer.cc|h.
>
> What part controls which symbols get into python?  I have it compiling
> mostly as it is in GrAtscEqualizer, but get this:
>
>
> > > > from gnuradio import atsc
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>  File "/usr/local/lib/python2.4/site-packages/gnuradio/atsc.py", line
> 4, in ?
>    import _atsc
> ImportError: /usr/local/lib/python2.4/site-packages/gnuradio/_atsc.so:
> undefined symbol: _ZN14atsc_equalizerC1Ev

If I had to guess, I'd say that atsc_equializer.cc isn't being linked in.

 -Ilia

> In atsc_equalizer.cc
> --------------------
> atsc_equalizer::atsc_equalizer(atsci_equalizer *equalizer)
>  : gr_sync_block("atsc_equalizer",
>                  gr_make_io_signature(2, 2, sizeof(float)),
>                  gr_make_io_signature(2, 2, sizeof(float)))
> {
>  d_equalizer = equalizer;
> }
>
>
>
> and in atsc_equalizer.h
> -----------------------
> class atsc_equalizer : public gr_sync_block
> {
>  friend atsc_equalizer_sptr atsc_make_equalizer();
>
>  atsc_equalizer();
>
> public:
>  void forecast (int noutput_items, gr_vector_int
> &ninput_items_required);
>  int work (int noutput_items,
>            gr_vector_const_void_star &input_items,
>            gr_vector_void_star &output_items);
>
>  void reset() { /* nop */ }
>
>  atsc_equalizer(atsci_equalizer *equalizer);
>
>
> protected:
>  atsci_equalizer       *d_equalizer;
>
> };