[ecasound] Confused looking at effect code

Hi All, hopefully a dev can help me with this:

looking at this block in the ladspa effect:

  for(unsigned long m = 0; m < port_count_rep; m++) {
    ...
    if (lilv_port_is_a(port, LILV_PORT_CLASS_CONTROL)) {

      struct PARAM_DESCRIPTION pd;
      parse_parameter_hint_information(m, params.size() + 1, &pd);

      params.push_back(pd.default_value);
      param_descs_rep.push_back(pd);
      if (params.size() > 1) param_names_rep += ",";
      string tmp
(kvu_string_search_and_replace(string(plugin_desc->PortNames[m]), ",",
"\\,"));
      param_names_rep += kvu_string_search_and_replace(tmp, ":", "\\:");
    }
  }

And also the snipped from parse_parameter_hint_information:

{
  ...
  pd->description = get_parameter_name(paramnum);
  ...
}

It seems to me that what is happening is

for each port {
  parse parameter => get_parameter_name=> read the n'th element of
param_names_rep
  add the port name taken from plugin_desc->PortNames to the n'th place of
param_names_rep
}

This is why I am confused. It seems that we read the port name from the
list (in a roundabout way) before the name is even placed there. Is there
some sort of other source for port names which get_parameter_name is somehow
accessing? Are ports different than parameters, and that's what's confusing
me?

Thanks for the help,
Jeremy Salwen

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Received on Thu Jun 9 00:15:03 2011