Add PannerNode DOM interface

components/script/dom/webidls/PannerNode.webidl

@@ -0,0 +1,56 @@
+/* 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/#pannernode
+ */
+
+dictionary PannerOptions : AudioNodeOptions {
+  PanningModelType panningModel = "equalpower";
+  DistanceModelType distanceModel = "inverse";
+  float positionX = 0;
+  float positionY = 0;
+  float positionZ = 0;
+  float orientationX = 1;
+  float orientationY = 0;
+  float orientationZ = 0;
+  double refDistance = 1;
+  double maxDistance = 10000;
+  double rolloffFactor = 1;
+  double coneInnerAngle = 360;
+  double coneOuterAngle = 360;
+  double coneOuterGain = 0;
+};
+
+enum DistanceModelType {
+  "linear",
+  "inverse",
+  "exponential"
+};
+
+enum PanningModelType {
+    "equalpower",
+    "HRTF"
+};
+
+[Exposed=Window,
+ Constructor (BaseAudioContext context, optional PannerOptions options)]
+interface PannerNode : AudioNode {
+  // attribute PanningModelType panningModel;
+  readonly attribute AudioParam positionX;
+  readonly attribute AudioParam positionY;
+  readonly attribute AudioParam positionZ;
+  readonly attribute AudioParam orientationX;
+  readonly attribute AudioParam orientationY;
+  readonly attribute AudioParam orientationZ;
+  // attribute DistanceModelType distanceModel;
+  // attribute double refDistance;
+  // attribute double maxDistance;
+  // attribute double rolloffFactor;
+  // attribute double coneInnerAngle;
+  // attribute double coneOuterAngle;
+  // attribute double coneOuterGain;
+  // void setPosition (float x, float y, float z);
+  // void setOrientation (float x, float y, float z);
+};