gecko-dev/dom/audiochannel/AudioChannelServiceChild.cpp

131 строка
3.3 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=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/. */
#include "AudioChannelServiceChild.h"
#include "base/basictypes.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/unused.h"
#include "mozilla/Util.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "nsIObserverService.h"
#include "nsThreadUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::hal;
StaticRefPtr<AudioChannelServiceChild> gAudioChannelServiceChild;
// static
AudioChannelService*
AudioChannelServiceChild::GetAudioChannelService()
{
MOZ_ASSERT(NS_IsMainThread());
// If we already exist, exit early
if (gAudioChannelServiceChild) {
return gAudioChannelServiceChild;
}
// Create new instance, register, return
nsRefPtr<AudioChannelServiceChild> service = new AudioChannelServiceChild();
NS_ENSURE_TRUE(service, nullptr);
gAudioChannelServiceChild = service;
return gAudioChannelServiceChild;
}
void
AudioChannelServiceChild::Shutdown()
{
if (gAudioChannelServiceChild) {
gAudioChannelServiceChild = nullptr;
}
}
AudioChannelServiceChild::AudioChannelServiceChild()
{
}
AudioChannelServiceChild::~AudioChannelServiceChild()
{
}
bool
AudioChannelServiceChild::GetMuted(AudioChannelAgent* aAgent, bool aElementHidden)
{
AudioChannelAgentData* data;
if (!mAgents.Get(aAgent, &data)) {
return true;
}
ContentChild *cc = ContentChild::GetSingleton();
bool muted = true;
bool oldElementHidden = data->mElementHidden;
UpdateChannelType(data->mType, CONTENT_PROCESS_ID_MAIN, aElementHidden, oldElementHidden);
// Update visibility.
data->mElementHidden = aElementHidden;
if (cc) {
cc->SendAudioChannelGetMuted(data->mType, aElementHidden, oldElementHidden, &muted);
}
data->mMuted = muted;
if (cc) {
cc->SendAudioChannelChangedNotification();
}
return muted;
}
void
AudioChannelServiceChild::RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
AudioChannelType aType)
{
AudioChannelService::RegisterAudioChannelAgent(aAgent, aType);
ContentChild *cc = ContentChild::GetSingleton();
if (cc) {
cc->SendAudioChannelRegisterType(aType);
}
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "audio-channel-agent-changed", nullptr);
}
}
void
AudioChannelServiceChild::UnregisterAudioChannelAgent(AudioChannelAgent* aAgent)
{
AudioChannelAgentData *pData;
if (!mAgents.Get(aAgent, &pData)) {
return;
}
// We need to keep a copy because unregister will remove the
// AudioChannelAgentData object from the hashtable.
AudioChannelAgentData data(*pData);
AudioChannelService::UnregisterAudioChannelAgent(aAgent);
ContentChild *cc = ContentChild::GetSingleton();
if (cc) {
cc->SendAudioChannelUnregisterType(data.mType, data.mElementHidden);
}
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "audio-channel-agent-changed", nullptr);
}
}