ehpersonal38
da4a8cc4ce
@mcguirepr89 I found this cool demo on codepen: https://codepen.io/jakealbaugh/pen/jvQweW And I adapted it to use the BirdNET-Pi audio livestream. Check it out!!
86 lines
2.0 KiB
PHP
86 lines
2.0 KiB
PHP
<script>
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// CREDITS: https://codepen.io/jakealbaugh/pen/jvQweW
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// UPDATE: there is a problem in chrome with starting audio context
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// before a user gesture. This fixes it.
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var started = null;
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window.onload = function(){
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if (started) return;
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started = true;
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initialize();
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};
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function initialize() {
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document.body.querySelector('h1').remove();
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const CVS = document.body.querySelector('canvas');
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const CTX = CVS.getContext('2d');
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const W = CVS.width = window.innerWidth;
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const H = CVS.height = window.innerHeight;
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const ACTX = new AudioContext();
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const ANALYSER = ACTX.createAnalyser();
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ANALYSER.fftSize = 4096;
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process();
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function process() {
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const SOURCE = ACTX.createMediaElementSource(document.getElementById('player'));
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SOURCE.connect(ANALYSER);
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SOURCE.connect(ACTX.destination)
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const DATA = new Uint8Array(ANALYSER.frequencyBinCount);
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const LEN = DATA.length;
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const h = H / LEN;
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const x = W - 1;
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CTX.fillStyle = 'hsl(280, 100%, 10%)';
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CTX.fillRect(0, 0, W, H);
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loop();
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function loop() {
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window.requestAnimationFrame(loop);
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let imgData = CTX.getImageData(1, 0, W - 1, H);
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CTX.fillRect(0, 0, W, H);
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CTX.putImageData(imgData, 0, 0);
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ANALYSER.getByteFrequencyData(DATA);
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for (let i = 0; i < LEN; i++) {
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let rat = DATA[i] / 255;
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let hue = Math.round((rat * 120) + 280 % 360);
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let sat = '100%';
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let lit = 10 + (70 * rat) + '%';
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CTX.beginPath();
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CTX.strokeStyle = `hsl(${hue}, ${sat}, ${lit})`;
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CTX.moveTo(x, H - (i * h));
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CTX.lineTo(x, H - (i * h + h));
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CTX.stroke();
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}
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}
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}
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}
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</script>
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<style>
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html, body {
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height: 100%;
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}
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canvas {
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display: block;
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height: 85%;
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width: 100%;
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}
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h1 {
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position: absolute;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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margin: 0;
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}
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</style>
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<audio style="display:none" controls="" crossorigin="anonymous" id='player' autoplay=""><source src="/stream"></audio>
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<h1>Loading...</h1>
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<canvas></canvas>
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