michael@0: /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  */
michael@0: 
michael@0: interface AudioChannelManager : EventTarget {
michael@0:   /**
michael@0:    * Indicates whether the headphones are plugged in or not.
michael@0:    */
michael@0:   readonly attribute boolean headphones;
michael@0: 
michael@0:   /**
michael@0:    * Fired when the headphones are plugged or unplugged.
michael@0:    *
michael@0:    * When the headphones are unplugged, we may start playing audio through the
michael@0:    * system's speakers.  Similarly, when headphones are plugged in, we may
michael@0:    * switch audio from speakers to headphones.
michael@0:    *
michael@0:    * If audio is currently playing in this window or in one of its children, we
michael@0:    * will fire this event before we switch the audio output from headphones to
michael@0:    * speakers (or vice versa).  This allows you to, for example, pause your
michael@0:    * window's audio when the headphones are unplugged.
michael@0:    */
michael@0:   attribute EventHandler onheadphoneschange;
michael@0: 
michael@0:   /**
michael@0:    * Indicates which audio channel is used to adjust volume when pressing HW
michael@0:    * volume keys.
michael@0:    */
michael@0:   attribute DOMString volumeControlChannel;
michael@0: };