michael@0: /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80: */
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 file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_audiochannelservicechild_h__
michael@0: #define mozilla_dom_audiochannelservicechild_h__
michael@0: 
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsISupports.h"
michael@0: 
michael@0: #include "AudioChannelService.h"
michael@0: #include "AudioChannelCommon.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class AudioChannelServiceChild : public AudioChannelService
michael@0: {
michael@0: public:
michael@0: 
michael@0:   /**
michael@0:    * Returns the AudioChannelServce singleton. Only to be called from main
michael@0:    * thread.
michael@0:    *
michael@0:    * @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise.
michael@0:    */
michael@0:   static AudioChannelService* GetAudioChannelService();
michael@0: 
michael@0:   static void Shutdown();
michael@0: 
michael@0:   virtual void RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
michael@0:                                          AudioChannel aChannel,
michael@0:                                          bool aWithVideo);
michael@0:   virtual void UnregisterAudioChannelAgent(AudioChannelAgent* aAgent);
michael@0: 
michael@0:   /**
michael@0:    * Return the state to indicate this agent should keep playing/
michael@0:    * fading volume/muted.
michael@0:    */
michael@0:   virtual AudioChannelState GetState(AudioChannelAgent* aAgent,
michael@0:                                      bool aElementHidden);
michael@0: 
michael@0:   virtual void SetDefaultVolumeControlChannel(int32_t aChannel,
michael@0:                                               bool aHidden);
michael@0: 
michael@0: protected:
michael@0:   AudioChannelServiceChild();
michael@0:   virtual ~AudioChannelServiceChild();
michael@0: };
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif
michael@0: