Initial commit: ACE-Step UI - Open source music generation interface
This commit is contained in:
fspecii
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<script>window.update = function(){};</script>
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<title>AudioMass - Spectrum Analyzer</title>
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<style>
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html,body{height:100%}
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body{padding:0;margin:0;background:#111;position:relative;z-index:2;overflow:hidden;}
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div{position:absolute;top:50%;left:0;right:0;z-index:1;margin-top:-18px;text-align:center;user-select:none;
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font-size:28px;color:#191919;pointer-events:none;opacity:.75;font-family:Arial}
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#e, #d, #f{
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cursor:pointer;
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position: absolute;
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top: 7px;
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right: 7px;
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display: block;
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height: 20px;
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z-index: 99999;
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background: #eaeaea;
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left:auto;
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border-radius:4px;
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font-family: sans-serif;
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font-size: 9px;
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width: 82px;
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line-height: 20px;
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padding: 0 6px;
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text-align: center;
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opacity:0.9;
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user-select:none;
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}
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.b #e, .b #d{
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top:12px;
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}
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.b #e, .b #f{
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display:block;
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}
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#e{
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right: 106px;
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width: 10px;
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line-height: 20px;
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padding: 0px 6px;
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text-align: center;
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opacity: 0.9;
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display:none;
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}
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#f{
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left: 0;
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right: 0;
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top: 0;
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padding: 0;
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width: 100%;
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line-height: 0;
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border-radius: 0;
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height: 4px;
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background: #333;
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display:none;
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user-select:none;
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-moz-user-select:none;
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}
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.c #f, #f:hover{
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background:#3C3C3C;
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}
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</style>
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<meta charset="utf-8" />
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</head>
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<body>
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<canvas id="fr" width="600" height="188" style="width:100%;height:100%;display:block"></canvas>
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<div>SPECTRUM ANALYSER</div>
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<a id="d" onclick="dock()">DOCK INTERFACE</a>
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<a id="e" onclick="remove()">X</a>
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<a id="f" onmousedown="drag(event)"></a>
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<script>
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var d = document;
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var w = window;
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var iframe = location.href.indexOf('?iframe') === -1 ? 0 : 1;
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var canvas = d.getElementById('fr');
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var ctx = canvas.getContext('2d', {alpha:true, antialias:false});
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w.remove = function (){};
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if (iframe) {
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d.body.className = 'b';
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w.remove = function () {
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w.parent.PKAudioEditor.ui.Dock ('RequestShowFreqAn', 'sp', [1, 1]);
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};
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};
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w.drag = function ( e ) {
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e.preventDefault ();
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e.stopPropagation ();
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w.parent.PKAudioEditor.ui.Dock ('RequestDragI', 'sp');
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};
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w.dock = function () {
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if (!iframe)
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{
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if (!w.opener || !w.opener.PKAudioEditor) {
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return ;
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}
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w.opener.PKAudioEditor.ui.Dock ('RequestShowFreqAn', 'sp', [1, 1]);
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w.close && w.close ();
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}
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else
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{
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var frm = w.parent.document.getElementById ('pk_fr' + 'sp');
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var t = 1;
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if (frm && frm.getBoundingClientRect) {
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var rect = frm.getBoundingClientRect ();
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t = [(w.parent.screenLeft + rect.left + 100)||0, (w.parent.screenTop + rect.top + 25)||0];
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}
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w.parent.PKAudioEditor.ui.Dock ('RequestShowFreqAn', 'sp', [t, 0]);
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}
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};
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w.getGrayColor = function(value) {
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return 'rgb(V, V, V)'.replace(/V/g, 255 - value);
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};
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w.getFullColor = function(value) {
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var colorPalette = {
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0: [0,0,0],
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10: [75, 0, 159],
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20: [104,0,251],
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30: [131,0,255],
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40: [155,18,157],
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50: [175, 37, 0],
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60: [191, 59, 0],
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70: [206, 88, 0],
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80: [223, 132, 0],
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90: [240, 188, 0],
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100: [255, 252, 0]
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};
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//floor to nearest 10:
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var decimalised = 100 * value / 255
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var percent = decimalised / 100;
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var floored = 10* Math.floor(decimalised / 10);
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var distFromFloor = decimalised - floored;
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var distFromFloorPercentage = distFromFloor/10;
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var rangeToNextColor;
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if (decimalised < 100){
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rangeToNextColor = [
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colorPalette[floored + 10][0] - colorPalette[floored + 10][0],
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colorPalette[floored + 10][1] - colorPalette[floored + 10][1],
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colorPalette[floored + 10][2] - colorPalette[floored + 10][2]
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];
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} else {
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rangeToNextColor = [0,0,0];
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}
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var color = [
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colorPalette[floored][0] + distFromFloorPercentage * rangeToNextColor[0],
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colorPalette[floored][1] + distFromFloorPercentage * rangeToNextColor[1],
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colorPalette[floored][2] + distFromFloorPercentage * rangeToNextColor[2]
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];
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return "rgb(" + color[0] +", "+color[1] +"," + color[2]+")";
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};
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setTimeout(function () {
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if (!iframe)
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{
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if (!w.opener || !w.opener.PKAudioEditor) return ;
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}
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var WIDTH = w.innerWidth, HEIGHT = w.innerHeight;
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if (canvas.width != WIDTH)
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{
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canvas.width = WIDTH;
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canvas.height = HEIGHT;
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}
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var bufferLength = 240;
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var value_changed = false;
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var speed = 3;
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var tempCanvas = document.createElement('canvas');
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tempCanvas.width = WIDTH;
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tempCanvas.height = HEIGHT;
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// console.log(this.canvas.height, this.tempCanvas.height);
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var tempCtx = tempCanvas.getContext ('2d');
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ctx.clearRect (0, 0, WIDTH, HEIGHT);
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function draw( data ) {
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var WIDTH = window.innerWidth, HEIGHT = window.innerHeight;
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if (canvas.width != WIDTH || canvas.height != HEIGHT)
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{
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canvas.width = WIDTH;
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canvas.height = HEIGHT;
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tempCanvas.width = WIDTH;
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tempCanvas.height = HEIGHT;
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}
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tempCtx.drawImage (canvas, 0, 0, WIDTH, HEIGHT);
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ctx.fillStyle = 'rgb(0, 0, 0)';
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ctx.fillRect(0, 0, WIDTH, HEIGHT);
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// Iterate over the frequencies.
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for (var i = 0; i < data.length; ++i)
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{
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var value;
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// Draw each pixel with the specific color.
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// if (this.log) {
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// logIndex = this.logScale(i, data.length);
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// value = data[logIndex];
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// } else {
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value = data[i];
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// }
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ctx.fillStyle = window.getFullColor(value);
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var percent = i / data.length;
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var y = Math.round (percent * HEIGHT);
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// draw the line at the right side of the canvas
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ctx.fillRect(WIDTH - speed, HEIGHT - y,
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speed, speed);
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}
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// Translate the canvas.
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ctx.translate(-speed, 0);
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// Draw the copied image.
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// console.log(this.width, this.height);
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ctx.drawImage (tempCanvas, 0, 0, WIDTH, HEIGHT,
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0, 0, WIDTH, HEIGHT);
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// Reset the transformation matrix.
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ctx.setTransform (1, 0, 0, 1, 0, 0);
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value_changed = false;
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};
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w.draw = draw;
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w.onunload = function () {
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w.destroy && w.destroy ( iframe );
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w.destroy = null;
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};
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w.update = function (freq_arr) {
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if (!freq_arr)
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ctx.clearRect (0, 0, WIDTH, HEIGHT);
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else {
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if (value_changed) return ;
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value_changed = true;
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window.requestAnimationFrame(function () {
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draw (freq_arr);
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});
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}
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};
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var last_press = 0;
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document.addEventListener ('keypress', function ( e ) {
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if (e.keyCode !== 32) return ;
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e.preventDefault ();
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e.stopPropagation ();
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if (e.timeStamp - last_press < 100) {
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return ;
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}
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last_press = e.timeStamp;
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if (!iframe) {
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w.opener && w.opener.PKAudioEditor.ui.Dock ('RequestKeyDown', 32);
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}
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else {
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w.parent && w.parent.PKAudioEditor.ui.Dock ('RequestKeyDown', 32);
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}
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});
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}, 60);
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</script>
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</body>
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</html>
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