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sndedit.html
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sndedit.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>RTTTL creator</title>
<style type="text/css">
#divTable {width: 100%;overflow: auto;}
.article { width: 100%; padding-left: 2em; background-color: #F9F9F9; font-family: Arial, "Bitstream Vera Sans" ,Helvetica,Verdana,sans-serif; color: #000; margin-top: 3px; }
.article td, table.article th { border-top-color: white; border-bottom: 1px solid #DFDFDF; color: #fff; }
.article th { text-shadow: rgba(255, 255, 255, 0.796875) 0px 1px 0px; font-family: Arial, "Bitstream Vera Sans" ,Helvetica,Verdana,sans-serif; font-weight: bold; padding: 7px 7px 8px; text-align: left; line-height: 1.3em; font-size: 12px; background: #E3F2D4; border-right: 1px solid #DFDFDF; }
.article td { font-size: 12px; padding: 7px 7px 8px; vertical-align: top; border-right: 1px solid #DFDFDF; height: 1.5em;}
.article .on { background: #d4e157;}
.article .hglt{ border-left:4px solid green;}
.article .f {position: absolute; width:2em; left: 0.4em; background:#524c00;opacity:0.7}
input[type=range] {position: relative;top: 6px;}
</style>
<script type="text/javascript">
var audio;
var isPlay,step;
var play_tone = {
"freq": 0,
"time": 0
}
var rtttl = {
"position": 0,
"startposition": 0,
"loop": 0,
"play": 0,
"default_dur": 0,
"default_oct": 0,
"bpm": 0,
"wholenote": 0,
"str": '',
"globalSound": 1
}
var notes = [
0, 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554, 587, 622, 659, 698, 740, 784, 831, 880,
932, 988, 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1976, 2093, 2217, 2349, 2489, 2637,
2794, 2960, 3136, 3322, 3520, 3729, 3951
];
var notesb = ['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];
var notesl = ['c','c#','d','d#','e','f','f#','g','g#','a','a#','b'];
var tableBPM = [25, 28, 31, 35, 40, 45, 50, 56, 63, 70, 80, 90, 100, 112, 125, 140, 160,
180, 200, 225, 250, 285, 320, 355, 400, 450, 500, 565, 635, 715, 800, 900];
var t = [];
var tD = [];
var tO = [];
var table = document.createElement('table');
var BPM = 125;
var octave = 5;
var rtttlSource = '';
function setBPM(v){
v = v * 1;
for(var i = 0; i < tableBPM.length; i++){
if(tableBPM[i] >= v){
BPM = tableBPM[i];
document.getElementById('BPM').value = tableBPM[i];
generateRtttl();
return;
}
}
}
function generateRtttl(){
rtttlSource = 's:d=4,o=' + octave + ',b=' + BPM + ':';
for(var j = 0; j < 64; j++){
var n = 'p';
for(var i = 0; i < 12; i++){
if(t[i][j] == 1){
n = notesl[i];
}
}
if(tD[j] > 0)
rtttlSource += tD[j] + n;
else
rtttlSource += n;
if(tO[j] > 0 && n != 'p')
rtttlSource += tO[j];
rtttlSource += ',';
}
rtttlSource += ' ';
rtttlSource = rtttlSource.replace(/[,p,]*\s/g, '');
document.getElementById('rtttl').value = rtttlSource;
}
function createTable() {
table.onclick = function(e) {
var target = (e || window.event).target;
var ti = target.getAttribute('i') * 1;
var tj = target.getAttribute('j') * 1;
if (target.tagName in {TD:1, TH:1} && target.innerHTML == ' '){
if(target.getAttribute('class')){
target.setAttribute('class', '');
t[ti][tj] = 0;
}
else{
for(i = 0 ; i < 12; i++){
t[i][tj] = 0;
table.rows[i].cells[tj + 1].setAttribute('class', '');
}
t[ti][tj] = 1;
target.setAttribute('class', 'on');
}
generateRtttl();
}
};
table.setAttribute('class', 'article');
// Insert New Row for table at index '0'.
for(var i = 0; i < 12; i++){
var row1 = table.insertRow(0);
t[i] = [];
for(var j = 64; j >= 0; j--){
// Insert New Column for Row1 at index '0'.
var row1col1 = row1.insertCell(0);
if(j == 0){
row1col1.innerHTML = notesb[i];
row1col1.setAttribute('class', 'f');
}
else{
row1col1.innerHTML = ' ';
row1col1.setAttribute('i', i);
row1col1.setAttribute('j', j - 1);
t[i][j - 1] = 0;
}
}
}
var row1 = table.insertRow(12);
for(var j = 64; j >= 0; j--){
// Insert New Column for Row1 at index '0'.
var row1col1 = row1.insertCell(0);
if(j == 0){
row1col1.innerHTML = 'd';
row1col1.setAttribute('class', 'f');
}
else{
tD[j - 1] = 0;
row1col1.innerHTML = '<select onchange="setD(this.options[this.selectedIndex].value,' + (j - 1) +')">' +
'<option value="1">1</option><option value="2">1/2</option>' +
'<option value="4">1/4</option><option value="8">1/8</option>' +
'<option value="16">1/16</option><option value="32">1/32</option>' +
'<option selected value="0">d</option></select>';
}
}
var row1 = table.insertRow(13);
for(var j = 64; j >= 0; j--){
// Insert New Column for Row1 at index '0'.
var row1col1 = row1.insertCell(0);
if(j == 0){
row1col1.innerHTML = 'o';
row1col1.setAttribute('class', 'f');
}
else{
tO[j - 1] = 0;
row1col1.innerHTML = '<select onchange="setO(this.options[this.selectedIndex].value,' + (j - 1) +')">' +
'<option value="4">4</option><option value="5">5</option>' +
'<option value="6">6</option><option value="7">7</option>' +
'<option selected value="0">o</option></select>';
}
}
// Append Table into div.
var div = document.getElementById('divTable');
div.appendChild(table);
}
function setD(v, i){
tD[i] = v * 1;
generateRtttl();
}
function setO(v, i){
tO[i] = v * 1;
generateRtttl();
}
function initAudio() {
if (!audio)
audio = new(window.AudioContext || window.webkitAudioContext)();
}
function isdigit(str) {
return /^\d+$/.test(str);
}
function isNumber(value) {
return typeof value === 'number' && isFinite(value);
}
function tone(freq, delay) {
var attack = 10,
gain = audio.createGain(),
osc = audio.createOscillator();
osc.connect(gain);
gain.connect(audio.destination);
gain.gain.value = 0.1;
osc.frequency.value = freq;
osc.type = "sine";
osc.start(0);
setTimeout(function () {
osc.stop(0);
osc.disconnect(gain);
gain.disconnect(audio.destination);
}, delay);
}
function addTone(f, t) {
play_tone.freq = f;
play_tone.time = t;
}
function loadRtttl() {
var n,
c,
i;
rtttl.default_dur = 4;
rtttl.default_oct = 6;
rtttl.bpm = 63;
rtttl.startposition = 0;
i = 0;
c = 0;
rtttl.str = rtttlSource;
rtttl.str += String.fromCharCode(0);
while (c != ':' && rtttl.startposition < rtttl.str.length) {
// ignore name
c = rtttl.str[rtttl.startposition];
rtttl.startposition++;
}
c = rtttl.str[rtttl.startposition]; // skip ':'
// get default duration
if (c == 'd') {
rtttl.startposition += 2; // skip "d="
n = '';
while (isdigit(rtttl.str[rtttl.startposition])) {
n += rtttl.str[rtttl.startposition];
rtttl.startposition++;
}
if (parseInt(n) > 0)
rtttl.default_dur = parseInt(n)
rtttl.startposition++; // skip comma
}
// get default octave
c = rtttl.str[rtttl.startposition];
if (c == 'o') {
rtttl.startposition += 2; // skip "o="
c = rtttl.str[rtttl.startposition];
if (parseInt(c) >= 3 && parseInt(c) <= 7)
rtttl.default_oct = parseInt(c);
rtttl.startposition += 2;
}
// get BPM
c = rtttl.str[rtttl.startposition];
if (c == 'b') {
rtttl.startposition += 2; // skip "b="
n = '';
while (isdigit(rtttl.str[rtttl.startposition])) {
n += rtttl.str[rtttl.startposition];
rtttl.startposition++;
}
if (parseInt(n) > 0)
rtttl.bpm = parseInt(n);
}
// BPM usually expresses the number of quarter notes per minute
rtttl.wholenote = (60 * 1000 / rtttl.bpm) * 4; // this is the time for whole note (in milliseconds)
rtttl.startposition++;
rtttl.position = 0;
return 1;
}
function testEndRtttl() {
if (rtttl.startposition + rtttl.position >= rtttl.str.length) {
if (!rtttl.loop)
rtttl.play = 0;
rtttl.position = 0;
clearColumns(step);
step = 0;
}
}
function highlihtColumns(n){
if(n < 64)
for(var i = 0 ; i < 12; i++){
table.rows[i].cells[n + 1].classList.add('hglt');
}
}
function clearColumns(n){
var pn;
if(n < 64){
if(step == 0)
pn = 63;
else
pn = step - 1;
for(var i = 0 ; i < 12; i++){
table.rows[i].cells[pn + 1].classList.remove('hglt');
}
}
}
function playRtttl() {
var n,
duration,
note,
scale,
c;
//first, get note duration, if available
n = 0;
testEndRtttl();
c = rtttl.str[rtttl.startposition + rtttl.position];
n = '';
while (isdigit(rtttl.str[rtttl.startposition + rtttl.position])) {
n += rtttl.str[rtttl.startposition + rtttl.position];
rtttl.position++;
}
if (isNumber(parseInt(n)) && parseInt(n) != 0)
duration = rtttl.wholenote / n;
else
duration = rtttl.wholenote / rtttl.default_dur; // we will need to check if we are a dotted note after
//now get the note
c = rtttl.str[rtttl.startposition + rtttl.position];
note = 0;
switch (c) {
case 'c':
case 'C':
note = 1;
break;
case 'd':
case 'D':
note = 3;
break;
case 'e':
case 'E':
note = 5;
break;
case 'f':
case 'F':
note = 6;
break;
case 'g':
case 'G':
note = 8;
break;
case 'a':
case 'A':
note = 10;
break;
case 'b':
case 'B':
note = 12;
break;
case 'p':
case 'P':
default:
note = 0;
}
clearColumns(step);
if(isPlay == 1)
highlihtColumns(step);
else
return;
step++;
if(step > 64){
rtttl.position = 0;
step = 0;
isPlay = 0;
setTimeout(function() { isPlay = 1;playRtttl(); }, 500);
}
if (rtttl.position < rtttl.str.length)
rtttl.position++;
else{
step = 0;
setTimeout(function() {playRtttl()}, 100);
}
c = rtttl.str[rtttl.startposition + rtttl.position];
// now, get optional '#' sharp
if (c == '#') {
note++;
if (rtttl.position < rtttl.str.length)
rtttl.position++;
else
setTimeout(function() {playRtttl()}, 100);
c = rtttl.str[rtttl.startposition + rtttl.position];
}
// now, get optional '.' dotted note
if (c == '.') {
duration += duration / 2;
if (rtttl.position < rtttl.str.length)
rtttl.position++;
else
setTimeout(function() {playRtttl()}, 100);
c = rtttl.str[rtttl.startposition + rtttl.position];
}
// now, get scale
if (isdigit(c)) {
scale = c - '0';
if (rtttl.position < rtttl.str.length)
rtttl.position++;
else
setTimeout(function() {playRtttl()}, 100);
c = rtttl.str[rtttl.startposition + rtttl.position];
} else {
scale = rtttl.default_oct;
}
if (c == ',')
rtttl.position++; // skip comma for next note (or we may be at the end)
// now play the note
if (note) {
tone(notes[(scale - 4) * 12 + note], duration);
} else {
//console.log("Pausing: " + duration);
}
setTimeout(function() {playRtttl()}, duration);
}
function startPlay(){
loadRtttl();
rtttl.loop = 1;
isPlay = 1;
step = 0;
playRtttl();
}
initAudio();
</script>
</head>
<body onload="createTable();">
<div id="divTable">
</div>
<textarea style="width:99%" id="rtttl"></textarea>
<br>
Beats per minute
<input type="range" class="slider" min="25" max="950" id="size"
oninput="setBPM(this.value)" value="125">
<input id="BPM" value = "125">
Octave
<select onchange="octave = (this.options[this.selectedIndex].value * 1); generateRtttl();">
<option value="4">4</option>
<option selected value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
</select>
<button onclick="startPlay();">play</button>
<button onclick="isPlay = 2;">stop</button>
</body>
</html>