Merge pull request #138 from videojs/hotfix/typed-array-detection

Require typed arrays for the tech to be supported

@@ -513,9 +513,15 @@ videojs.Hls.supportsNativeHls = (function() {
 })();
 })();
 
 
 videojs.Hls.isSupported = function() {
 videojs.Hls.isSupported = function() {
+
+  // Only use the HLS tech if native HLS isn't available
   return !videojs.Hls.supportsNativeHls &&
   return !videojs.Hls.supportsNativeHls &&
+    // Flash must be supported for the fallback to work
     videojs.Flash.isSupported() &&
     videojs.Flash.isSupported() &&
-    videojs.MediaSource;
+    // Media sources must be available to stream bytes to Flash
+    videojs.MediaSource &&
+    // Typed arrays are used to repackage the segments
+    window.Uint8Array;
 };
 };
 
 
 videojs.Hls.canPlaySource = function(srcObj) {
 videojs.Hls.canPlaySource = function(srcObj) {

@@ -1152,6 +1152,15 @@ test('has no effect if native HLS is available', function() {
   player.dispose();
   player.dispose();
 });
 });
 
 
+test('is not supported on browsers without typed arrays', function() {
+  var oldArray = window.Uint8Array;
+  window.Uint8Array = null;
+  ok(!videojs.Hls.isSupported(), 'HLS is not supported');
+
+  // cleanup
+  window.Uint8Array = oldArray;
+});
+
 test('tracks the bytes downloaded', function() {
 test('tracks the bytes downloaded', function() {
   player.src({
   player.src({
     src: 'http://example.com/media.m3u8',
     src: 'http://example.com/media.m3u8',