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

enum{
	Gh1,
	Gh2,
	Gh3,
	Gh4,
	Gh5,
	Gh6,
	Gfreq,
	Gexit,
};

char *keywords[] = {
	"h1",
	"h2",
	"h3",
	"h4",
	"h5",
	"h6",
	"freq",
	"exit",
	0,
};

void
threadmain(int argc, char *argv[])
{
	Abuf ab;
	Event ev;
	double f, s;
	int i, t;
	double harm[6];

	guistart(argv[1]);

	ainit(&ab, 1);
	f = miditofreq(69);
	for(i=0; i<6; i++)
		harm[i] = i == 0;
	for(t=0;;t++){
		while(nbrecv(guichan, &ev) == 1){
			switch(ev.k){
			case Gfreq:
				f = miditofreq(ev.n);
				break;
			case Gexit:
				threadexitsall(0);
			default:
				harm[ev.k - Gh1] = ev.n / 127.0;
				break;
			}
		}
		s = 0;
		for(i=0; i<6; i++)
			s += sin(f*2*PI*(i+1)*t/SRATE) * harm[i] / (i+1);
		aputd(&ab, s/6);
	}
}