#include <u.h>
#include <libc.h>
#include <thread.h>
#include "abuf.h"
#include "guic.h"

enum{
	Gfreq,
	Gtype,
	Gvol,
	Gexit,
};

char *keywords[] = {
	"freq",
	"type",
	"vol",
	"exit",
	0,
};

void
threadmain(int argc, char *argv[])
{
	double ph, w, s, v;
	int type;
	Abuf ab;
	Event ev;

	if(argc < 2)
		sysfatal("usage: osc gui");
	guistart(argv[1]);
	
	ainit(&ab, 1);
	w = miditophase(69);
	v = 1;
	type = 0;
	
	for(ph=0;;ph+=w){
		while(nbrecv(guichan, &ev) == 1) switch(ev.k){
		case Gfreq:
			w = miditophase(ev.n);
			break;
		case Gtype:
			type = ev.n;
			break;
		case Gvol:
			v = voltomul(ev.n);
			break;
		case Gexit:
			threadexitsall(0);
		}
		switch(type){
		case 0:
			s = sin(ph * 2 * PI);
			break;
		case 1:
			s = (fmod(ph, 1) < 0.5) * 2 - 1;
			break;
		case 2:
			s = fmod(ph, 1) * 2 - 1;
			break;
		}
		aputd(&ab, s*v);
	}
}