chin-chin
// ==UserScript==
// @name epiano
// @namespace https://epiano.jp/
// @version 0.5
// @description
// @match https://epiano.jp/sp/*
// @grant none
// @run-at document-start
// @noframes
// @description chin-chin
// ==/UserScript==
window.MIDIACCESS_BACK = navigator.requestMIDIAccess;
navigator.requestMIDIAccess = null;
function releaseBufferA(key, uid) {
const id = uid + key;
if (id in playings) {
for (i in playings[id]) {
const ar = playings[id][i];
const time = window.context.currentTime;
const source = ar[0]
const gain = ar[1];
gain.setValueAtTime(gain.value, time);
gain.linearRampToValueAtTime(gain.value * 0.1, time + 0.16);
gain.linearRampToValueAtTime(0.0, time + 0.4);
source.stop(time + 0.41);
}
delete playings[id];
}
}
function playBufferA(key,vol,uid){
if(vol == undefined){
vol = DEFAULT_VELOCITY;
}
if(key in buffers){
const source = window.context.createBufferSource();
source.buffer = buffers[key];
const gainNode = window.context.createGain();
gainNode.connect(window.context.destination);
gainNode.gain.value = vol * ($(".volume").get(0).value);
source.connect(gainNode);
source.start(0);
if(!playings[uid+key]){
playings[uid+key] = [];
}
playings[uid+key].push([source,gainNode.gain]);
}
}
function ease(t, totalTime, min, max) {
max -= min;
t = t / totalTime;
if (t < 0.43) {
return max * (t / 2.3) + min;
}
return max * t * t + min;
}
function releaseSustainA() {
window.gSustain = false;
for (const msg of window.PENDING_MIDI_MESSAGES) {
releaseA(msg);
}
window.PENDING_MIDI_MESSAGES.clear();
}
function pressA(id, vol) {
const newVol = ease(vol, 1.5, 0.0, 2.0) * 3.0;
if (window.PENDING_MIDI_MESSAGES.has(id)) {
releaseBufferA(id, loginInfo.myID);
if (!$("#disconnect").is(":checked")) {
socket.emit('r', id);
}
window.PENDING_MIDI_MESSAGES.delete(id)
}
playPianoA(window.MIDI_KEY_NAMES[id - 21], loginInfo.myID, newVol);
if (!window.DISCONNECT.is(":checked")) {
socket.emit('p', window.MIDI_KEY_NAMES[id - 21], newVol);
}
}
function releaseA(id) {
if (window.gSustain) {
window.PENDING_MIDI_MESSAGES.add(id);
}
else {
releaseBufferA(window.MIDI_KEY_NAMES[id - 21], loginInfo.myID);
if (!window.DISCONNECT.is(":checked")) {
socket.emit('r', window.MIDI_KEY_NAMES[id - 21]);
}
}
}
function playPianoA(id, uid, vol) {
if (ignoreList[uid]) {
return;
}
var newVol = vol;
if (newVol > 2.0 || newVol < -1) {
newVol = 2.0;
ignoreList[uid] = 1
}
playBufferA(id, newVol, uid);
const pikaColor = uid == loginInfo.myID ? "#00FF00" : "#FF0000";
if(!window.DISCONNECT.is(":checked")){
$("[uid="+uid+"]").css("backgroundColor", pikaColor)
.stop(true)
.show()
.animate({ top: "5px" }, 100).animate({ top: "0px" }, 100)
}
setTimeout(function(){
$("[uid="+uid+"]").css("backgroundColor","")
},200);
//鍵盤の動作発動
if (id in pianoKeyObj) {
pianoKeyObj[id].dispatchEvent(uid == loginInfo.myID ? "mousedownSelf" : "mousedownOther");
}
}
function updateList(list) {
var htmls = new Array();
$(list).each(function (i) {
var uid = list[i];
var isIgnore = ignoreList[uid] ? "class='ignore' style='text-decoration:line-through;background:#999'" : "";
htmls.push("<span class=user " + isIgnore + " uid=" + uid + ">" + uid + "</span>");
});
$("#users").html(htmls.join(""));
$("#onlineNumber").html(htmls.length);
}
window.addEventListener('load', function () {
// ペダル用 解放待機中のMIDIメッセージ
if (window.PENDING_MIDI_MESSAGES == undefined) {
window.PENDING_MIDI_MESSAGES = new Set();
}
window.gSustain = false;
window.DISCONNECT = $("#disconnect");
$(document).off("pressSustain");
$(document).off("releaseSustain");
socket.off('p');
socket.off('r');
//弾く
socket.on('p',function(id,uid,vol){
if(!window.DISCONNECT.is(":checked")){
playPianoA(id,uid,vol);
}
});
//離す
socket.on('r',function(id,uid){
if(!window.DISCONNECT.is(":checked")){
releaseBufferA(id,uid);
}
});
navigator.requestMIDIAccess = window.MIDIACCESS_BACK;
(function () {
window.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) {
window.MIDI_KEY_NAMES.push(bare_notes[i] + oct);
}
}
window.MIDI_KEY_NAMES.push("c7");
if (navigator.requestMIDIAccess) {
$("#connectJava").hide();
navigator.requestMIDIAccess({sysex:false}).then(
function (midi) {
function midimessagehandler(evt) {
switch(evt.data[0] & 0xf0)
{
// NOTE_ON
case 0x90:
pressA(evt.data[1], evt.data[2] / 127.0);
return;
// NOTE_OFF
case 0x80:
releaseA(evt.data[1]);
return;
case 0xB0:
if (evt.data[1] == 64)
{
if (evt.data[2] > 0) {
window.gSustain = true;
} else {
releaseSustainA();
}
}
return;
}
}
function plug() {
if (midi.inputs.size > 0) {
var ul = document.createElement("ul");
var inputs = midi.inputs.values();
for (var input_it = inputs.next(); input_it && !input_it.done; input_it = inputs.next()) {
var input = input_it.value;
input.onmidimessage = midimessagehandler;
console.log("input", input);
var li = document.createElement("li");
li.textContent = input.name;
ul.appendChild(li);
}
$("body").prop("midi", input.name)
$("#alert").hide().html("MIDIデバイス：" + input.name).slideDown("fast", function () {
if (timerId) {
clearTimeout(timerId);
}
timerId = setTimeout(function () { $("#alert").slideUp("slow") }, 5000);
});
new Notification({ title: "MIDI Inputs In Use", html: ul.innerHTML, duration: 4000 });
}
if (gMidiOutTest && midi.outputs.size > 0) {
var outputs = midi.outputs.values();
for (var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
var output = output_it.value;
console.log("output", output);
}
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;
var outputs = midi.outputs.values();
for (var output_it = outputs.next(); output_it && !output_it.done; output_it = outputs.next()) {
var output = output_it.value;
output.send([0x90, note_number, vel], window.performance.now() + delay_ms);
}
}
}
}
midi.addEventListener("statechange", function (evt) {
if (evt instanceof MIDIConnectionEvent) {
plug();
}
});
plug();
},
function (err) {
console.log(err);
});
}
})();
addJS_Node(updateList);
})
addJS_Node(releaseSustainA);
addJS_Node(pressA);
addJS_Node(releaseA);
addJS_Node(playPianoA);
addJS_Node(playBufferA);
addJS_Node(releaseBufferA);
addJS_Node(ease);
function addJS_Node(text, s_URL, funcToRun, runOnLoad) {
var D = document;
var scriptNode = D.createElement('script');
if (runOnLoad) {
scriptNode.addEventListener("load", runOnLoad, false);
}
scriptNode.type = "text/javascript";
if (text) scriptNode.textContent = text;
if (s_URL) scriptNode.src = s_URL;
if (funcToRun) scriptNode.textContent = '(' + funcToRun.toString() + ')()';
var targ = D.getElementsByTagName('head')[0] || D.body || D.documentElement;
targ.appendChild(scriptNode);
}