gecko-dev/dom/speakermanager/SpeakerManagerService.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#ifndef mozilla_dom_SpeakerManagerService_h__
#define mozilla_dom_SpeakerManagerService_h__

#include "nsAutoPtr.h"
#include "nsIObserver.h"
#include "nsTArray.h"
#include "SpeakerManager.h"
#include "nsIAudioManager.h"
#include "nsCheapSets.h"
#include "nsHashKeys.h"

namespace mozilla {
namespace dom {

class SpeakerManagerService : public nsIObserver
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIOBSERVER
  /*
   * Return null or instance which has been created.
   */
  static SpeakerManagerService* GetSpeakerManagerService();
  /*
   * Return SpeakerManagerService instance.
   * If SpeakerManagerService is not exist, create and return new one.
   */
  static SpeakerManagerService* GetOrCreateSpeakerManagerService();
  virtual void ForceSpeaker(bool aEnable, bool aVisible);
  virtual bool GetSpeakerStatus();
  virtual void SetAudioChannelActive(bool aIsActive);
  // Called by child
  void ForceSpeaker(bool enable, uint64_t aChildid);
  // Register the SpeakerManager to service for notify the speakerforcedchange event
  void RegisterSpeakerManager(SpeakerManager* aSpeakerManager)
  {
    mRegisteredSpeakerManagers.AppendElement(aSpeakerManager);
  }
  void UnRegisterSpeakerManager(SpeakerManager* aSpeakerManager)
  {
    mRegisteredSpeakerManagers.RemoveElement(aSpeakerManager);
  }

protected:
  SpeakerManagerService();

  virtual ~SpeakerManagerService();
  // Notify to UA if device speaker status changed
  virtual void Notify();

  void TurnOnSpeaker(bool aEnable);

  /**
   * Shutdown the singleton.
   */
  static void Shutdown();

  nsTArray<nsRefPtr<SpeakerManager> > mRegisteredSpeakerManagers;
  // Set for remember all the child speaker status
  nsCheapSet<nsUint64HashKey> mSpeakerStatusSet;
  // The Speaker status assign by UA
  bool mOrgSpeakerStatus;

  bool mVisible;
  // This is needed for IPC communication between
  // SpeakerManagerServiceChild and this class.
  friend class ContentParent;
  friend class ContentChild;
};

} // namespace dom
} // namespace mozilla

#endif