diff -r 000000000000 -r 6474c204b198 dom/webidl/MediaSource.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/MediaSource.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum MediaSourceReadyState {
+  "closed",
+  "open",
+  "ended"
+};
+
+enum MediaSourceEndOfStreamError {
+  "network",
+  "decode"
+};
+
+[Constructor, Pref="media.mediasource.enabled"]
+interface MediaSource : EventTarget {
+  readonly attribute SourceBufferList sourceBuffers;
+  readonly attribute SourceBufferList activeSourceBuffers;
+  readonly attribute MediaSourceReadyState readyState;
+  [SetterThrows]
+  attribute unrestricted double duration;
+  [NewObject, Throws]
+  SourceBuffer addSourceBuffer(DOMString type);
+  [Throws]
+  void removeSourceBuffer(SourceBuffer sourceBuffer);
+  [Throws]
+  void endOfStream(optional MediaSourceEndOfStreamError error);
+  static boolean isTypeSupported(DOMString type);
+};