Initial WebAudio API stubs

components/script/dom/webidls/AudioNode.webidl

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+/* 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
+ * https://webaudio.github.io/web-audio-api/#dom-audionode
+ */
+
+enum ChannelCountMode {
+  "max",
+  "clamped-max",
+  "explicit"
+};
+
+enum ChannelInterpretation {
+  "speakers",
+  "discrete"
+};
+
+dictionary AudioNodeOptions {
+   unsigned long         channelCount;
+   ChannelCountMode      channelCountMode;
+   ChannelInterpretation channelInterpretation;
+};
+
+[Exposed=Window]
+interface AudioNode : EventTarget {
+  [Throws]
+  AudioNode connect(AudioNode destinationNode,
+                    optional unsigned long output = 0,
+                    optional unsigned long input = 0);
+  [Throws]
+  void connect(AudioParam destinationParam,
+               optional unsigned long output = 0);
+  [Throws]
+  void disconnect();
+  [Throws]
+  void disconnect(unsigned long output);
+  [Throws]
+  void disconnect(AudioNode destination);
+  [Throws]
+  void disconnect(AudioNode destination, unsigned long output);
+  [Throws]
+  void disconnect(AudioNode destination,
+                  unsigned long output,
+                  unsigned long input);
+  [Throws]
+  void disconnect(AudioParam destination);
+  [Throws]
+  void disconnect(AudioParam destination, unsigned long output);
+
+  readonly attribute BaseAudioContext context;
+  readonly attribute unsigned long numberOfInputs;
+  readonly attribute unsigned long numberOfOutputs;
+
+  [SetterThrows]
+  attribute unsigned long channelCount;
+  [SetterThrows]
+  attribute ChannelCountMode channelCountMode;
+  attribute ChannelInterpretation channelInterpretation;
+};