79 lines
2.8 KiB
JavaScript
79 lines
2.8 KiB
JavaScript
|
|
var midi = require('midi');
|
|
var MidiOutput = new midi.output();
|
|
var portCount = MidiOutput.getPortCount();
|
|
var portConnected = false;
|
|
console.log(`Found ${portCount} MIDI ports:`);
|
|
for (let portNumber = 0; portNumber < portCount; portNumber++) {
|
|
let portName = MidiOutput.getPortName(portNumber)
|
|
console.log(`Port ${portNumber}: ${portName}`);
|
|
if (portName == "TiMidity 128:0" && !portConnected) {
|
|
MidiOutput.openPort(portNumber);
|
|
portConnected = true;
|
|
}
|
|
}
|
|
if (!portConnected) {console.error("Couldn't find MIDI port"); process.exit(1);}
|
|
|
|
|
|
var MIDI_TRANSPOSE = -12;
|
|
var MIDI_KEY_NAMES = ["a-1", "as-1", "b-1"];
|
|
var bare_notes = "c cs d ds e f fs g gs a as b".split(" ");
|
|
for(var oct = 0; oct < 7; oct++) {
|
|
for(var i in bare_notes) {
|
|
MIDI_KEY_NAMES.push(bare_notes[i] + oct);
|
|
}
|
|
}
|
|
MIDI_KEY_NAMES.push("c7");
|
|
var pressedKeys = {};
|
|
var gMidiOutTest = function(note_name, vel, delay_ms) {
|
|
var note_number = MIDI_KEY_NAMES.indexOf(note_name);
|
|
if(note_number == -1) return;
|
|
note_number = note_number + 9 - MIDI_TRANSPOSE;
|
|
|
|
//MidiOutput.wait(delay_ms).send([0x90, note_number, Math.floor(vel)]); //JZZ
|
|
setTimeout(function(){
|
|
|
|
// maintain on/off order
|
|
if (vel) { // if this is a start note
|
|
if (pressedKeys[note_number]) // and the key is pressed
|
|
MidiOutput.sendMessage([0x90, note_number, 0]); // send stop note before sending start note
|
|
MidiOutput.sendMessage([0x90, note_number, vel]); // go ahead…
|
|
pressedKeys[note_number] = true; // and the key is now pressed.
|
|
} else { // if this is a stop note
|
|
if (pressedKeys[note_number]) { // and the key is pressed
|
|
MidiOutput.sendMessage([0x90, note_number, vel]); // go ahead…
|
|
pressedKeys[note_number] = false; // and the key is now released.
|
|
} // else the key is already stopped; ignore.
|
|
}
|
|
|
|
}, delay_ms);
|
|
}
|
|
|
|
|
|
var Client = require("mpp-client");
|
|
global.gClient = new Client(process.env.MPU || "wss://www.multiplayerpiano.com:443");
|
|
gClient.setChannel(process.env.MPCH || "lobby");
|
|
gClient.start();
|
|
gClient.on("hi", ()=> console.log("MPP Client Ready"));
|
|
|
|
gClient.on("n", function(msg) {
|
|
var t = msg.t - gClient.serverTimeOffset + 1000 - Date.now();
|
|
|
|
for(var i = 0; i < msg.n.length; i++) {
|
|
var note = msg.n[i];
|
|
var ms = t + (note.d || 0);
|
|
if(ms < 0) {
|
|
ms = 0;
|
|
}
|
|
else if(ms > 10000) continue;
|
|
if(note.s) {
|
|
gMidiOutTest(note.n, 0, ms);
|
|
} else {
|
|
var vel = (typeof note.v !== "undefined")? parseFloat(note.v) : 0.5;
|
|
if(vel < 0) vel = 0; else if (vel > 1) vel = 1;
|
|
gMidiOutTest(note.n, vel * 127, ms);
|
|
setTimeout(gMidiOutTest, 1000, note.n, 0, ms); // limit note presses to 1 sec
|
|
}
|
|
}
|
|
});
|