bug 1112338 - increase max output stream to 720p r=rbarker, mfinkle

toolkit/modules/secondscreen/RokuApp.jsm

@@ -285,23 +285,24 @@ function RemoteMirror(url, win, viewport, mirrorStartedCallback, contentWindow)
   this._iceCandidates = [];
   this.mirrorStarted = mirrorStartedCallback;
 
-  // This code insures the generated tab mirror is not wider than 800 nor taller than 600
+  // This code insures the generated tab mirror is not wider than 1280 nor taller than 720
   // Better dimensions should be chosen after the Roku Channel is working.
   let windowId = contentWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils).outerWindowID;
   let cWidth =  Math.max(viewport.cssWidth, viewport.width);
   let cHeight = Math.max(viewport.cssHeight, viewport.height);
 
-  const MAX_WIDTH = 800;
-  const MAX_HEIGHT = 600;
+  const MAX_WIDTH = 1280;
+  const MAX_HEIGHT = 720;
 
   let tWidth = 0;
   let tHeight = 0;
 
+  // division and multiplication by 4 to ensure dimensions are multiples of 4
   if ((cWidth / MAX_WIDTH) > (cHeight / MAX_HEIGHT)) {
-    tHeight = Math.ceil((MAX_WIDTH / cWidth) * cHeight);
+    tHeight = Math.ceil((MAX_WIDTH / (4* cWidth)) * cHeight) * 4;
     tWidth = MAX_WIDTH;
   } else {
-    tWidth = Math.ceil((MAX_HEIGHT / cHeight) * cWidth);
+    tWidth = Math.ceil((MAX_HEIGHT / (4 * cHeight)) * cWidth) * 4;
     tHeight = MAX_HEIGHT;
   }