Re: [Discuss-gnuradio] compiling atsc_trellis_encoder.cc

[Eric Blossom]

On Tue, Apr 11, 2006 at 06:05:11PM -0400, Charles Swiger wrote:
> On Tue, 2006-04-11 at 09:52 -0400, Charles Swiger wrote:
> > Well, it compiles but there are likely still issues since the 0.9 work
> > function in GrAtscTrellisEncoder.cc has stuff to deal with an array
> > of encoders that I don't understand:
> > 
> > 
> >   // We must produce output.size units of output.
> > 
> >   for (unsigned int i = 0; i < output.size; i +=
> > atsci_trellis_encoder::NCODERS){
> >     // primitive does 12 segments at a time.
> >     // pipeline info is handled in the primitive.
> >     encoder.encode (&out[i], &in[i + start]);
> >   }
> > 
> > 
> > Guess I'll look at where output.size comes from and what start does.
> > 
> > --Chuck
> 
> Yeah, if anybody has a clue how to implement the work function for
> an atsc_trellis_encoder.cc - I'm stuck. The code compiles but
> segfaults, very likely due to using a simple:
> 
>   for (int i = 0; i < noutput_items; i++){
>     d_trellis_encoder.encode(&out[i], &in[i]);
> 
> Mainly, I have no idea how output.size is created from
> setOutputSize(atsci_trellis_encoder::NCODERS);

Hi Chuck, 

Off the top of my head (haven't looked at the code), I think you just
need to set_output_multiple(atsci_trellis_encoder::NCODERS) in the
constructor.  

Eric