osc2artnet/index.js

Receives OSC-Packages (e.g. from TouchOSC) and translates them to ArtNet-DMX, e.g. for Light-Software remote control

#!/usr/bin/env node

var prefix= "o2a";
// OSC: /o2a/(universe)/(channel) value
/*
Universe in decimal!
Subnet: first 4 bits
Universe: last 4 bits

Example: Subnet 1 (0x1) DMX-Universe 0 (0x0) = 0x10 = 0d16 = Dezimal 16
*/
//Set up Artnet
//Load dmxnet as libary
var dmxlib=require("dmxnet");
//Create new dmxnet instance
var dmxnet = new dmxlib.dmxnet({});
//Create senders array for universes
var senders=[];
// Create an osc.js UDP Port listening
var osc = require("osc");
var udpPort = new osc.UDPPort({
    localAddress: "0.0.0.0",
    metadata: true
});

// Open the socket.
udpPort.open();

// When the port is read, send an OSC message to, say, SuperCollider
udpPort.on("message", function (oscMsg) {
    //Split String
	var uri_parts=oscMsg.address.split('/');
	//Check for Prefix
	if ((typeof uri_parts[1] !== 'undefined')&&(uri_parts[1]==prefix)) {
		//Check for valid Universe
		if ((typeof uri_parts[2] !== 'undefined')&&(parseInt(uri_parts[2])>=0 && parseInt(uri_parts[2])<256)) {
			var universe=parseInt(uri_parts[2]);
			if(senders[universe]===undefined) {
				console.log("Create new Sender Object for universe "+universe);
				//Create new Sender instance
				senders[universe]=dmxnet.newSender({ip:"255.255.255.255",subuni:universe,net:0});
			}
			//Check for valid Channel
			if ((typeof uri_parts[3] !== 'undefined')&&(parseInt(uri_parts[3])>=0 && parseInt(uri_parts[3])<512)) {
				var channel=parseInt(uri_parts[3]);
				//Check for valid Value
				if ((typeof oscMsg.args[0].value !== 'undefined')&&(!isNaN(oscMsg.args[0].value))) {
					var value=parseInt(oscMsg.args[0].value);
					if(value>=0&&value<256) {
						console.log("SendArtnet: Universe "+universe+" Ch."+channel+" Val."+value);
						//Send ArtNet
						senders[universe].setChannel(channel, value);
					}
				}
			}
		}
	}
});