mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 08:38:00 +00:00
109 lines
2.7 KiB
HTML
109 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Meter</title>
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
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<link rel="icon" type="image/png" sizes="174x174" href="./style/favicon.png">
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<script src="../build/Tone.js"></script>
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<script src="./scripts/jquery.min.js"></script>
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<script src="./scripts/draggabilly.js"></script>
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<script src="https://tonejs.github.io/Logo/build/Logo.js"></script>
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<script src="./scripts/StartAudioContext.js"></script>
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<script src="./scripts/Interface.js"></script>
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<link rel="stylesheet" type="text/css" href="./style/examples.css">
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<script>
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// jshint ignore: start
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</script>
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<style type="text/css">
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canvas {
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margin-top: 2px;
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width: 100%;
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height: 90px;
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border-radius: 10px;
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}
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</style>
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</head>
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<body>
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<div id="Content" class="FullScreen">
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<div id="Title">Meter</div>
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<div id="Explanation">
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<a href="https://tonejs.github.io/docs/#Meter" target="_blank">Tone.Meter</a>
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gives you the level of the incoming signal in decibels.
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</div>
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</div>
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<script>
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//create a level meter
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var meter = new Tone.Meter();
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var player = new Tone.Player({
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"url" : "./audio/FWDL.[mp3|ogg]",
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"loop" : true
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}).connect(meter).toMaster();
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// GUI //
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//start button
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Interface.Button({
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key : 32,
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type : "toggle",
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text : "Start",
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activeText : "Stop",
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start : function(){
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player.start();
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},
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end : function(){
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player.stop();
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}
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});
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//drawing the FFT
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var meterContext = $("<canvas>",{
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"id" : "fft"
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}).appendTo("#Content").get(0).getContext("2d");
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var meterGraident;
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function drawMeter(){
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var level = meter.getLevel();
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level = Tone.dbToGain(level); //scale it between 0 - 1
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meterContext.clearRect(0, 0, canvasWidth, canvasHeight);
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meterContext.fillStyle = meterGraident;
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meterContext.fillRect(0, 0, canvasWidth, canvasHeight);
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meterContext.fillStyle = "white";
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meterContext.fillRect(canvasWidth * level, 0, canvasWidth, canvasHeight);
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}
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//size the canvase
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var canvasWidth, canvasHeight;
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function sizeCanvases(){
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canvasWidth = $("#fft").width();
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canvasHeight = $("#fft").height();
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meterContext.canvas.width = canvasWidth;
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meterContext.canvas.height = canvasHeight;
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//make the gradient
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meterGraident = meterContext.createLinearGradient(0, 0, canvasWidth, canvasHeight);
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meterGraident.addColorStop(0, "#BFFF02");
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meterGraident.addColorStop(0.8, "#02FF24");
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meterGraident.addColorStop(1, "#FF0202");
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}
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sizeCanvases();
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$(window).resize(sizeCanvases);
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function loop(){
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requestAnimationFrame(loop);
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//draw the meter level
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drawMeter();
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}
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loop();
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</script>
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</body>
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</html>
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