73 lines
2.1 KiB
Vue
Executable File
73 lines
2.1 KiB
Vue
Executable File
<template>
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<div>
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<div class="container">
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<h1 class="display-4">{{ text }}</h1>
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</div>
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</div>
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</template>
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<script>
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export default {
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mounted() {
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let audioCtx = new (window.AudioContext || window.webkitAudioContext)();
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let upperPercentile = 0.9;
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let lowerPercentile = 0.1;
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let buffer = [];
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let levelValues = [];
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let upperValue = 0;
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let lowerValue = 0;
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navigator.mediaDevices.getUserMedia({ audio: true }).then((stream) => {
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let source = audioCtx.createMediaStreamSource(stream);
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let bandPass65 = audioCtx.createBiquadFilter();
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bandPass65.type = "bandpass";
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bandPass65.frequency.value = 65;
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bandPass65.Q.value = 1.41;
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let bandPass125 = audioCtx.createBiquadFilter();
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bandPass125.type = "bandpass";
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bandPass125.frequency.value = 125;
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bandPass125.Q.value = 1.41;
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let analyser = audioCtx.createAnalyser();
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analyser.fftSize = 512;
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analyser.minDecibels = -100;
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analyser.maxDecibels = -1;
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source.connect(bandPass65);
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bandPass65.connect(bandPass125);
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bandPass125.connect(analyser);
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let dataArray = new Float32Array(analyser.frequencyBinCount);
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function update() {
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analyser.getFloatFrequencyData(dataArray);
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buffer.push(...dataArray);
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if (buffer.length > 10 * audioCtx.sampleRate) {
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buffer = buffer.slice(-10 * audioCtx.sampleRate);
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}
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levelValues = buffer.map(val => Math.pow(10, (val / 20)));
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levelValues = levelValues.map(val => Math.floor(val));
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let sortedData = levelValues.slice().sort((a, b) => a - b);
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upperValue = sortedData[Math.floor(upperPercentile * sortedData.length)];
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lowerValue = sortedData[Math.floor(lowerPercentile * sortedData.length)];
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console.log("Upper Percentile in Decimal: " + upperValue);
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console.log("Lower Percentile in Decimal: " + lowerValue);
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requestAnimationFrame(update);
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}
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update();
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});
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},
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data(){
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return{
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text : "Helo World",
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}
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}
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}
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</script> |