diff -r 000000000000 -r 6474c204b198 content/media/DecoderTraits.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/DecoderTraits.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+#ifndef DecoderTraits_h_
+#define DecoderTraits_h_
+
+#include "nsCOMPtr.h"
+
+class nsAString;
+class nsACString;
+
+namespace mozilla {
+
+class AbstractMediaDecoder;
+class MediaDecoder;
+class MediaDecoderOwner;
+class MediaDecoderReader;
+
+enum CanPlayStatus {
+  CANPLAY_NO,
+  CANPLAY_MAYBE,
+  CANPLAY_YES
+};
+
+class DecoderTraits {
+public:
+  // Returns the CanPlayStatus indicating if we can handle this
+  // MIME type. The MIME type should not include the codecs parameter.
+  // That parameter should be passed in aCodecs, and will only be
+  // used if whether a given MIME type being handled depends on the
+  // codec that will be used.  If the codecs parameter has not been
+  // specified, pass false in aHaveRequestedCodecs.
+  static CanPlayStatus CanHandleMediaType(const char* aMIMEType,
+                                          bool aHaveRequestedCodecs,
+                                          const nsAString& aRequestedCodecs);
+
+  // Returns true if we should handle this MIME type when it appears
+  // as an <object> or as a toplevel page. If, in practice, our support
+  // for the type is more limited than appears in the wild, we should return
+  // false here even if CanHandleMediaType would return true.
+  static bool ShouldHandleMediaType(const char* aMIMEType);
+
+  // Create a decoder for the given aType. Returns null if we
+  // were unable to create the decoder.
+  static already_AddRefed<MediaDecoder> CreateDecoder(const nsACString& aType,
+                                                      MediaDecoderOwner* aOwner);
+
+  // Create a reader for thew given MIME type aType. Returns null
+  // if we were unable to create the reader.
+  static MediaDecoderReader* CreateReader(const nsACString& aType,
+                                          AbstractMediaDecoder* aDecoder);
+
+  // Returns true if MIME type aType is supported in video documents,
+  // or false otherwise. Not all platforms support all MIME types, and
+  // vice versa.
+  static bool IsSupportedInVideoDocument(const nsACString& aType);
+
+  // Returns true if we should not start decoder until we receive
+  // OnConnected signal. (currently RTSP only)
+  static bool DecoderWaitsForOnConnected(const nsACString& aType);
+};
+
+}
+
+#endif
+