resize canvas when app/window is being resized; add permission for audio capture...

[tricorder.git] / js / tricorder.js

diff --git a/js/tricorder.js b/js/tricorder.js
index f88ebb120e470277fc7818a1d35a095e2ff76a5e..de33ae3a630e2c2eed70a95e946c314aea24b8fd 100644 (file)
--- a/js/tricorder.js
+++ b/js/tricorder.js
@@ -5,6 +5,8 @@
 var gStardate, gSDBase;
 var gSounds = {};
 
 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");
 window.onload = function() {
   setTimeout(updateStardate, 0);
   gSounds.scan = new Audio("sound/scan.opus");


@@ -31,14 +33,22 @@ window.onload = function() {
   }, false);
 }
 
   }, false);
 }
 

+window.onresize = function() {
+  if (document.getElementById("sectSound").classList.contains("active")) {
+    gModSound.resize();
+  }
+}
+

 function updateStardate() {
   if (!gStardate)
     gStardate = document.getElementById("stardate");
 
   var curDate = new Date();
 
 function updateStardate() {
   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)
   if (!gSDBase)

-    gSDBase = new Date("September 8, 1966 20:00:00 EST");
+    gSDBase = new Date("September 8, 1966 20:30:00 EST");

 
   var sdateval = (curDate - gSDBase) / (86400 * 365.2425);
   gStardate.textContent = sdateval.toFixed(1);
 
   var sdateval = (curDate - gSDBase) / (86400 * 365.2425);
   gStardate.textContent = sdateval.toFixed(1);


@@ -214,6 +224,86 @@ var gModGrav = {
   },
 }
 
   },
 }
 

+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() {
 
 var gModDev = {
   activate: function() {


@@ -226,23 +316,32 @@ var gModDev = {
     gSounds.scan.pause();
   },
   updateBattery: function() {
     gSounds.scan.pause();
   },
   updateBattery: function() {

-    document.getElementById("devBattLevel").textContent = (navigator.battery.level * 100).toFixed(1) + "%";
-    document.getElementById("devBattStatus").textContent = 
-        navigator.battery.charging ? "charging, " + navigator.battery.chargingTime + "s remaining"
-                                   : navigator.battery.dischargingTime + "s usage remaining";
+    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,
 }
 
   },
   batteryTimer: null,
 }
 

-var gModNull = {
-  activate: function() {
-    //gSounds.scan.play();
-  },
-  deactivate: function() {
-    gSounds.scan.pause();
-  },
-}
-

 var gModOther = {
   activate: function() {
     //gSounds.scan.play();
 var gModOther = {
   activate: function() {
     //gSounds.scan.play();