gecko-dev/dom/audiochannel/AudioChannelServiceChild.h

63 строки
1.8 KiB
C++

/* -*- 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_audiochannelservicechild_h__
#define mozilla_dom_audiochannelservicechild_h__
#include "nsAutoPtr.h"
#include "nsISupports.h"
#include "AudioChannelService.h"
#include "AudioChannelCommon.h"
namespace mozilla {
namespace dom {
class AudioChannelServiceChild : public AudioChannelService
{
public:
/**
* Returns the AudioChannelServce singleton or null if the process havn't create it before.
* Only to be called from main thread.
*/
static AudioChannelService* GetAudioChannelService();
/**
* Returns the AudioChannelServce singleton.
* If AudioChannelServce is not exist, create and return new one.
* Only to be called from main thread.
*/
static AudioChannelService* GetOrCreateAudioChannelService();
static void Shutdown();
virtual void RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
AudioChannel aChannel,
bool aWithVideo);
virtual void UnregisterAudioChannelAgent(AudioChannelAgent* aAgent);
/**
* Return the state to indicate this agent should keep playing/
* fading volume/muted.
*/
virtual AudioChannelState GetState(AudioChannelAgent* aAgent,
bool aElementHidden);
virtual void SetDefaultVolumeControlChannel(int32_t aChannel,
bool aHidden);
protected:
AudioChannelServiceChild();
virtual ~AudioChannelServiceChild();
};
} // namespace dom
} // namespace mozilla
#endif