зеркало из https://github.com/mozilla/gecko-dev.git
150 строки
4.3 KiB
C++
150 строки
4.3 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_audiochannelservice_h__
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#define mozilla_dom_audiochannelservice_h__
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#include "nsAutoPtr.h"
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#include "nsIObserver.h"
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#include "nsTArray.h"
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#include "AudioChannelCommon.h"
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#include "AudioChannelAgent.h"
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#include "nsClassHashtable.h"
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namespace mozilla {
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namespace dom {
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class AudioChannelService : public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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/**
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* Returns the AudioChannelServce singleton. Only to be called from main thread.
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* @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise.
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*/
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static AudioChannelService*
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GetAudioChannelService();
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/**
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* Shutdown the singleton.
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*/
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static void Shutdown();
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/**
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* Any audio channel agent that starts playing should register itself to
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* this service, sharing the AudioChannelType.
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*/
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virtual void RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
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AudioChannelType aType);
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/**
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* Any audio channel agent that stops playing should unregister itself to
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* this service.
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*/
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virtual void UnregisterAudioChannelAgent(AudioChannelAgent* aAgent);
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/**
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* Return true if this type should be muted.
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*/
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virtual bool GetMuted(AudioChannelAgent* aAgent, bool aElementHidden);
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/**
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* Return true if there is a content channel active in this process
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* or one of its subprocesses.
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*/
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virtual bool ContentOrNormalChannelIsActive();
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protected:
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void Notify();
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/**
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* Send the audio-channel-changed notification if needed.
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*/
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void SendAudioChannelChangedNotification();
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/* Register/Unregister IPC types: */
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void RegisterType(AudioChannelType aType, uint64_t aChildID);
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void UnregisterType(AudioChannelType aType, bool aElementHidden,
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uint64_t aChildID);
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bool GetMutedInternal(AudioChannelType aType, uint64_t aChildID,
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bool aElementHidden, bool aElementWasHidden);
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/* Update the internal type value following the visibility changes */
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void UpdateChannelType(AudioChannelType aType, uint64_t aChildID,
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bool aElementHidden, bool aElementWasHidden);
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AudioChannelService();
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virtual ~AudioChannelService();
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enum AudioChannelInternalType {
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AUDIO_CHANNEL_INT_NORMAL = 0,
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AUDIO_CHANNEL_INT_NORMAL_HIDDEN,
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AUDIO_CHANNEL_INT_CONTENT,
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AUDIO_CHANNEL_INT_CONTENT_HIDDEN,
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AUDIO_CHANNEL_INT_NOTIFICATION,
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AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN,
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AUDIO_CHANNEL_INT_ALARM,
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AUDIO_CHANNEL_INT_ALARM_HIDDEN,
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AUDIO_CHANNEL_INT_TELEPHONY,
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AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN,
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AUDIO_CHANNEL_INT_RINGER,
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AUDIO_CHANNEL_INT_RINGER_HIDDEN,
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AUDIO_CHANNEL_INT_PUBLICNOTIFICATION,
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AUDIO_CHANNEL_INT_PUBLICNOTIFICATION_HIDDEN,
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AUDIO_CHANNEL_INT_LAST
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};
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bool ChannelsActiveWithHigherPriorityThan(AudioChannelInternalType aType);
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const char* ChannelName(AudioChannelType aType);
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AudioChannelInternalType GetInternalType(AudioChannelType aType,
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bool aElementHidden);
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class AudioChannelAgentData {
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public:
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AudioChannelAgentData(AudioChannelType aType,
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bool aElementHidden,
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bool aMuted)
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: mType(aType)
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, mElementHidden(aElementHidden)
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, mMuted(aMuted)
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{}
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AudioChannelType mType;
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bool mElementHidden;
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bool mMuted;
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};
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static PLDHashOperator
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NotifyEnumerator(AudioChannelAgent* aAgent,
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AudioChannelAgentData* aData, void *aUnused);
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nsClassHashtable< nsPtrHashKey<AudioChannelAgent>, AudioChannelAgentData > mAgents;
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nsTArray<uint64_t> mChannelCounters[AUDIO_CHANNEL_INT_LAST];
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AudioChannelType mCurrentHigherChannel;
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AudioChannelType mCurrentVisibleHigherChannel;
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nsTArray<uint64_t> mActiveContentChildIDs;
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bool mActiveContentChildIDsFrozen;
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// This is needed for IPC comunication between
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// AudioChannelServiceChild and this class.
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friend class ContentParent;
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friend class ContentChild;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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