var gStardate, gSDBase;
var gSounds = {};
+ navigator.getUserMedia = (navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia);
+
window.onload = function() {
setTimeout(updateStardate, 0);
gSounds.scan = new Audio("sound/scan.opus");
}, false);
}
+ window.onresize = function() {
+ if (document.getElementById("sectSound").classList.contains("active")) {
+ gModSound.resize();
+ }
+ }
+
function updateStardate() {
+ // Stardate rules foggy at best. See http://en.wikipedia.org/wiki/Stardate
+ // and the Memory Alpha article linked there for more details.
+ // We roughly lean on TNG scale by splitting an Earth year into exactly 1000
+ // units, but we put the 0 point at the TV premiere of The Original Series.
if (!gStardate)
gStardate = document.getElementById("stardate");
var curDate = new Date();
+ // Star Trek famously premiered on Thursday, September 8, 1966, at 8:30 p.m.
+ // See http://www.startrek.com/article/what-if-the-original-star-trek-had-debuted-on-friday-nights
if (!gSDBase)
- // Star Trek premiered on Thursday, September 8, 1966, at 7:30PM or 8:30PM
- // depending on time zone in the United States.
- // See http://www.startrek.com/article/star-trek-and-newspapers-part-2
- gSDBase = new Date("September 8, 1966 19:30:00 EST");
+ gSDBase = new Date("September 8, 1966 20:30:00 EST");
var sdateval = (curDate - gSDBase) / (86400 * 365.2425);
gStardate.textContent = sdateval.toFixed(1);
},
}
+ var gModSound = {
+ activate: function() {
+ //gSounds.scan.play();
+ if (navigator.getUserMedia && (window.AudioContext || window.webkitAudioContext)) {
+ 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.rebuildCanvas();
+ },
+ 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";
+ }
+ },
+ rebuildCanvas: function() {
+ if (gModSound.mDisplay.AFRequestID) {
+ window.cancelAnimationFrame(gModSound.mDisplay.AFRequestID);
+ gModSound.mDisplay.AFRequestID = 0;
+ }
+ gModSound.mDisplay.canvas.height = document.getElementById("soundavail").clientHeight - 4;
+ 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;
+ gModSound.mDisplay.AFRequestID = window.requestAnimationFrame(gModSound.paintAnalyzerFrame);
+ },
+ 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)
+ gModSound.mDisplay.AFRequestID = window.requestAnimationFrame(gModSound.paintAnalyzerFrame);
+ },
+ resize: function() {
+ gModSound.rebuildCanvas();
+ },
+ deactivate: function() {
+ if (gModSound.mDisplay.active) {
+ gModSound.mAudio.stream.stop();
+ gModSound.mDisplay.active = false;
+ }
+ gSounds.scan.pause();
+ },
+ }
var gModDev = {
activate: function() {
batteryTimer: null,
}
- var gModNull = {
- activate: function() {
- //gSounds.scan.play();
- },
- deactivate: function() {
- gSounds.scan.pause();
- },
- }
-
var gModOther = {
activate: function() {
//gSounds.scan.play();