From d5aec7c6c65a62e2f3d50db520d31fa7b9a73028 Mon Sep 17 00:00:00 2001
From: Derk-Jan Hartman <hartman.wiki@gmail.com>
Date: Mon, 23 May 2016 23:25:43 +0200
Subject: [PATCH] Only add sources if the type is supported by a Tech

There is not much use in adding sources that we cannot play, so filter
them out. Backwards compatible with Tech's that do not yet support
canPlayType().

Fixes #15
---
 lib/videojs-resolution-switcher.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/videojs-resolution-switcher.js b/lib/videojs-resolution-switcher.js
index 5b1448e..901add1 100644
--- a/lib/videojs-resolution-switcher.js
+++ b/lib/videojs-resolution-switcher.js
@@ -178,6 +178,15 @@
           player.controlBar.resolutionSwitcher.dispose();
           delete player.controlBar.resolutionSwitcher;
         }
+        // Only add those sources which we can (maybe) play
+        src = src.filter( function(source) {
+          try {
+            return ( player.canPlayType( source.type ) !== '' );
+          } catch (e) {
+            // If a Tech doesn't yet have canPlayType just add it
+            return true;
+          }
+        });
         //Sort sources
         src = src.sort(compareResolutions);
         groupedSrc = bucketSources(src);