+var gModSound = {
+ activate: function() {
+ //gSounds.scan.play();
+ if (navigator.getUserMedia) {
+ document.getElementById("soundunavail").style.display = "none";
+ document.getElementById("soundavail").style.display = "block";
+ navigator.getUserMedia({ audio: true },
+ function(aLocalMediaStream) {
+ gModSound.mAudio.stream = aLocalMediaStream;
+ gModSound.mAudio.context = new (window.AudioContext || window.webkitAudioContext)();
+ gModSound.mAudio.input = gModSound.mAudio.context.createMediaStreamSource(gModSound.mAudio.stream);
+ // Could put a filter in between like in http://webaudioapi.com/samples/microphone/
+ gModSound.mDisplay.canvas = document.getElementById("soundcanvas");
+ gModSound.mDisplay.context = gModSound.mDisplay.canvas.getContext("2d");
+ gModSound.mDisplay.canvas.height = document.getElementById("soundavail").clientHeight - 2;
+ gModSound.mDisplay.canvas.width = document.getElementById("soundavail").clientWidth;
+ gModSound.mAudio.frequencySlices = (gModSound.mDisplay.canvas.width > 512) ?
+ 512 :
+ Math.pow(2, Math.floor(Math.log(gModSound.mDisplay.canvas.width) / Math.LN2));
+ console.log("slices: " + gModSound.mAudio.frequencySlices);
+ gModSound.mAudio.analyzer = gModSound.mAudio.context.createAnalyser();
+ // Make the FFT four times as large as needed as the upper three quarters turn out to be useless.
+ gModSound.mAudio.analyzer.fftSize = gModSound.mAudio.frequencySlices * 4;
+ console.log("FFT: " + gModSound.mAudio.analyzer.fftSize);
+ gModSound.mAudio.input.connect(gModSound.mAudio.analyzer);
+ gModSound.mDisplay.context.setTransform(1, 0, 0, -(gModSound.mDisplay.canvas.height/256), 0, gModSound.mDisplay.canvas.height);
+ gModSound.mDisplay.active = true;
+ window.requestAnimationFrame(gModSound.paintAnalyzerFrame);
+ },
+ function(err) {
+ document.getElementById("soundunavail").style.display = "block";
+ document.getElementById("soundavail").style.display = "none";
+ console.log(err);
+ }
+ );
+ }
+ else {
+ document.getElementById("soundunavail").style.display = "block";
+ document.getElementById("soundavail").style.display = "none";
+ }
+ },
+ mAudio: {
+ frequencySlices: 32, // Must be a multiple of 2 (see AnalyserNode.fftSize)
+ },
+ mDisplay: {
+ active: false,
+ },
+ paintAnalyzerFrame: function(aTimestamp) {
+ var data = new Uint8Array(gModSound.mAudio.frequencySlices);
+ gModSound.mAudio.analyzer.getByteFrequencyData(data);
+ gModSound.mDisplay.context.clearRect(0, 0, gModSound.mDisplay.canvas.width, gModSound.mDisplay.canvas.height);
+ // Out of experience, only the first half of the slices are actually useful.
+ var wid = gModSound.mDisplay.canvas.width / gModSound.mAudio.frequencySlices;
+ var fill = "#9C9CFF";
+ for (var i = 0; i < gModSound.mAudio.frequencySlices; ++i) {
+ var newFill = (data[i] > 200) ? "#FF0000" : ((data[i] > 100) ? "#FFCF00" : "#9C9CFF");
+ if (fill != newFill) { gModSound.mDisplay.context.fillStyle = newFill; fill = newFill; }
+ gModSound.mDisplay.context.fillRect(i*wid, 0, wid, data[i]);
+ }
+ if (gModSound.mDisplay.active)
+ window.requestAnimationFrame(gModSound.paintAnalyzerFrame);
+ },
+ deactivate: function() {
+ if (gModSound.mDisplay.active) {
+ gModSound.mAudio.stream.stop();
+ gModSound.mDisplay.active = false;
+ }
+ gSounds.scan.pause();
+ },
+}
+
+var gModDev = {
+ activate: function() {
+ gSounds.scan.play();
+ this.batteryTimer =
+ setInterval(function () { gModDev.updateBattery(); }, 100);
+ },
+ deactivate: function() {
+ clearTimeout(this.batteryTimer);
+ gSounds.scan.pause();
+ },
+ updateBattery: function() {
+ document.getElementById("devBattLevel").textContent =
+ (navigator.battery.level * 100).toFixed(1) + "%";
+ if (navigator.battery.charging) {
+ if (navigator.battery.chargingTime == 0 ||
+ navigator.battery.chargingTime == Infinity) {
+ document.getElementById("devBattStatus").textContent = "charging";
+ }
+ else {
+ document.getElementById("devBattStatus").textContent =
+ "charging, " + navigator.battery.chargingTime + "s remaining";
+ }
+ }
+ else {
+ if (navigator.battery.dischargingTime == 0 ||
+ navigator.battery.dischargingTime == Infinity) {
+ document.getElementById("devBattStatus").textContent = "discharging";
+ }
+ else {
+ document.getElementById("devBattStatus").textContent =
+ navigator.battery.dischargingTime + "s usage remaining";
+ }
+ }
+ },
+ batteryTimer: null,
+}
+