16 Apr
2008
16 Apr
'08
2:39 p.m.
(answering to LAD only)
Luthman va escriure:
This is a development tool, but I'm sending it to
the LAU list as well
in case there are any not-yet-hackers who would like to start writing
effects or synths. It's easy, I promise. Here's the code you would need
to write for a simple gain effect:
#include <lv2plugin.hpp>
#include "gain.peg"
class Gain : public LV2::Plugin<Gain> {
public:
Gain(double rate) : LV2::Plugin<Gain>(p_n_ports) { }
void run(uint32_t nframes) {
for (uint32_t i = 0; i < nframes; ++i)
p(p_out)[i] = p(p_gain) * p(p_in);
}
};
static int _ = Gain::register_class("http://my.plugin/");
This is simple indeed.
However, this code brings me some questions. Are all variables (p,
p_out, p_in, p_gain) declared as Plugin base class members?
It does not make much sense to me that "p_gain" is a generic
control/member?
What about p_n_ports? Seems undefined to me.
( Also i assume that p(p_in) should be p(p_in)[i] )
Hmmm, i smell that gain.peg might be the answer to some of this
questions. Could you explain what goes in there?
Thanks,
Pau