acoustic speedtest

speedtest.js

var audioCtx = new (window.AudioContext || window.webkitAudioContext)();

function playNote(frequency, duration, callback) {
    duration = duration / 1000;

    // create Oscillator node
    var oscillator = audioCtx.createOscillator();

    oscillator.type = 'square';
    oscillator.frequency.value = frequency; // value in hertz
    oscillator.connect(audioCtx.destination);

    oscillator.onended = callback;
    oscillator.start(0);
    oscillator.stop(audioCtx.currentTime + duration);
}

function calculateAverage(array){
    var total = 0;
    var count = 0;

    array.forEach(function(item, index){
        total += item;
        count++;
    });

    return total / count;
}


//JUST AN EXAMPLE, PLEASE USE YOUR OWN PICTURE!
var imageAddr = "https://raw.githubusercontent.com/Schokokex/speedtest/main/Bild_2020-11-08_002410.png"; 
var downloadSize = 236832; //bytes

function ShowProgressMessage(msg) {
    if (console) {
        if (typeof msg == "string") {
            console.log(msg);
        } else {
            for (var i = 0; i < msg.length; i++) {
                console.log(msg[i]);
            }
        }
    }
    
    var oProgress = document.getElementById("progress");
    if (oProgress) {
        var actualHTML = (typeof msg == "string") ? msg : msg.join("<br />");
        oProgress.innerHTML = actualHTML;
    }
}

function InitiateSpeedDetection() {
    ShowProgressMessage("Loading the image, please wait...");
    window.setTimeout(MeasureConnectionSpeed, 1);
};    

if (window.addEventListener) {
    window.addEventListener('load', InitiateSpeedDetection, false);
} else if (window.attachEvent) {
    window.attachEvent('onload', InitiateSpeedDetection);
}

var lasthund = Array(100).fill(10000000);

function MeasureConnectionSpeed() {
    var startTime, endTime;
    var download = new Image();
    download.onload = function () {
        endTime = (new Date()).getTime();
        showResults();
    }
    
    download.onerror = function (err, msg) {
        ShowProgressMessage("Invalid image, or error downloading");
    }
    
    startTime = (new Date()).getTime();
    var cacheBuster = "?nnn=" + startTime;
    download.src = imageAddr + cacheBuster;
    
    function showResults() {
        var duration = (endTime - startTime) / 1000;
        var bitsLoaded = downloadSize * 8;
        var speedBps = (bitsLoaded / duration).toFixed(2);
        var speedKbps = (speedBps / 1024).toFixed(2);
        var speedMbps = (speedKbps / 1024).toFixed(2);
        ShowProgressMessage([
            "Your connection speed is:", 
            speedBps + " bps", 
            speedKbps + " kbps", 
            speedMbps + " Mbps"
        ]);
	
	lasthund.push(Number(speedKbps));
	lasthund.shift();
	    
	var frequency = speedKbps * 1000 / calculateAverage(lasthund) ;
	playNote(frequency, 100);
	
    }
}

var shouldrun = true;

function plsstop(){
  shouldrun = false;
  setTimeout(()=>{shouldrun = true}, 200);
}

function test() {
  if (shouldrun){
    MeasureConnectionSpeed();
    setTimeout(test, 100);
  }
}


test();