diff -r 000000000000 -r 6474c204b198 dom/system/gonk/nsIAudioManager.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/gonk/nsIAudioManager.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,57 @@
+/* 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/. */
+
+#include "nsISupports.idl"
+
+[scriptable, builtinclass, uuid(60da41b4-cdc2-11e2-8a91-10bf48d64bd4)]
+interface nsIAudioManager : nsISupports
+{
+  /**
+   * Microphone muted?
+   */
+  attribute boolean microphoneMuted;
+
+  /**
+   * Are we playing audio from the FM radio?
+   */
+  attribute boolean fmRadioAudioEnabled;
+ 
+  /**
+   * Set the phone's audio mode.
+   */
+  const long PHONE_STATE_INVALID          = -2;
+  const long PHONE_STATE_CURRENT          = -1;
+  const long PHONE_STATE_NORMAL           = 0;
+  const long PHONE_STATE_RINGTONE         = 1;
+  const long PHONE_STATE_IN_CALL          = 2;
+  const long PHONE_STATE_IN_COMMUNICATION = 3;
+
+  attribute long phoneState;
+
+  /**
+   * Configure a particular device ("force") to be used for one of the uses
+   * (communication, media playback, etc.)
+   */
+  const long FORCE_NONE            = 0; // the default
+  const long FORCE_SPEAKER         = 1;
+  const long FORCE_HEADPHONES      = 2;
+  const long FORCE_BT_SCO          = 3;
+  const long FORCE_BT_A2DP         = 4;
+  const long FORCE_WIRED_ACCESSORY = 5;
+  const long FORCE_BT_CAR_DOCK     = 6;
+  const long FORCE_BT_DESK_DOCK    = 7;
+
+  const long USE_COMMUNICATION     = 0;
+  const long USE_MEDIA             = 1;
+  const long USE_RECORD            = 2;
+  const long USE_DOCK              = 3;
+
+  void setForceForUse(in long usage, in long force);
+  long getForceForUse(in long usage);
+
+  /* The range of volume index is from 0 to N. Ex: 0 ~ 15 */
+  void setAudioChannelVolume(in long channel, in long index);
+  long getAudioChannelVolume(in long channel);
+  long getMaxAudioChannelVolume(in long channel);
+};