gecko/dom/audiochannel/AudioChannelService.h

192 lines
5.8 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/. */
#ifndef mozilla_dom_audiochannelservice_h__
#define mozilla_dom_audiochannelservice_h__
#include "nsAutoPtr.h"
#include "nsIObserver.h"
#include "nsTArray.h"
#include "nsITimer.h"
#include "AudioChannelCommon.h"
#include "AudioChannelAgent.h"
#include "nsClassHashtable.h"
namespace mozilla {
namespace dom {
class AudioChannelService
: public nsIObserver
, public nsITimerCallback
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
NS_DECL_NSITIMERCALLBACK
/**
* Returns the AudioChannelServce singleton. Only to be called from main
* thread.
*
* @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise.
*/
static AudioChannelService* GetAudioChannelService();
/**
* Shutdown the singleton.
*/
static void Shutdown();
/**
* Any audio channel agent that starts playing should register itself to
* this service, sharing the AudioChannelType.
*/
virtual void RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
AudioChannelType aType,
bool aWithVideo);
/**
* Any audio channel agent that stops playing should unregister itself to
* this service.
*/
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);
/**
* Return true if there is a content channel active in this process
* or one of its subprocesses.
*/
virtual bool ContentOrNormalChannelIsActive();
/**
* Return true if a normal or content channel is active for the given
* process ID.
*/
virtual bool ProcessContentOrNormalChannelIsActive(uint64_t aChildID);
/***
* AudioChannelManager calls this function to notify the default channel used
* to adjust volume when there is no any active channel.
*/
virtual void SetDefaultVolumeControlChannel(AudioChannelType aType,
bool aHidden);
protected:
void Notify();
/**
* Send the audio-channel-changed notification for the given process ID if
* needed.
*/
void SendAudioChannelChangedNotification(uint64_t aChildID);
/* Register/Unregister IPC types: */
void RegisterType(AudioChannelType aType, uint64_t aChildID, bool aWithVideo);
void UnregisterType(AudioChannelType aType, bool aElementHidden,
uint64_t aChildID, bool aWithVideo);
void UnregisterTypeInternal(AudioChannelType aType, bool aElementHidden,
uint64_t aChildID, bool aWithVideo);
AudioChannelState GetStateInternal(AudioChannelType aType, uint64_t aChildID,
bool aElementHidden,
bool aElementWasHidden);
/* Update the internal type value following the visibility changes */
void UpdateChannelType(AudioChannelType aType, uint64_t aChildID,
bool aElementHidden, bool aElementWasHidden);
/* Send the default-volume-channel-changed notification */
void SetDefaultVolumeControlChannelInternal(AudioChannelType aType,
bool aHidden, uint64_t aChildID);
AudioChannelService();
virtual ~AudioChannelService();
enum AudioChannelInternalType {
AUDIO_CHANNEL_INT_NORMAL = 0,
AUDIO_CHANNEL_INT_NORMAL_HIDDEN,
AUDIO_CHANNEL_INT_CONTENT,
AUDIO_CHANNEL_INT_CONTENT_HIDDEN,
AUDIO_CHANNEL_INT_NOTIFICATION,
AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN,
AUDIO_CHANNEL_INT_ALARM,
AUDIO_CHANNEL_INT_ALARM_HIDDEN,
AUDIO_CHANNEL_INT_TELEPHONY,
AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN,
AUDIO_CHANNEL_INT_RINGER,
AUDIO_CHANNEL_INT_RINGER_HIDDEN,
AUDIO_CHANNEL_INT_PUBLICNOTIFICATION,
AUDIO_CHANNEL_INT_PUBLICNOTIFICATION_HIDDEN,
AUDIO_CHANNEL_INT_LAST
};
bool ChannelsActiveWithHigherPriorityThan(AudioChannelInternalType aType);
bool CheckVolumeFadedCondition(AudioChannelInternalType aType,
bool aElementHidden);
const char* ChannelName(AudioChannelType aType);
AudioChannelInternalType GetInternalType(AudioChannelType aType,
bool aElementHidden);
class AudioChannelAgentData {
public:
AudioChannelAgentData(AudioChannelType aType,
bool aElementHidden,
AudioChannelState aState,
bool aWithVideo)
: mType(aType)
, mElementHidden(aElementHidden)
, mState(aState)
, mWithVideo(aWithVideo)
{}
AudioChannelType mType;
bool mElementHidden;
AudioChannelState mState;
const bool mWithVideo;
};
static PLDHashOperator
NotifyEnumerator(AudioChannelAgent* aAgent,
AudioChannelAgentData* aData, void *aUnused);
nsClassHashtable< nsPtrHashKey<AudioChannelAgent>, AudioChannelAgentData > mAgents;
nsTArray<uint64_t> mChannelCounters[AUDIO_CHANNEL_INT_LAST];
AudioChannelType mCurrentHigherChannel;
AudioChannelType mCurrentVisibleHigherChannel;
nsTArray<uint64_t> mActiveContentChildIDs;
nsTArray<uint64_t> mWithVideoChildIDs;
bool mActiveContentChildIDsFrozen;
nsCOMPtr<nsITimer> mDeferTelChannelTimer;
bool mTimerElementHidden;
uint64_t mTimerChildID;
uint64_t mDefChannelChildID;
// This is needed for IPC comunication between
// AudioChannelServiceChild and this class.
friend class ContentParent;
friend class ContentChild;
};
} // namespace dom
} // namespace mozilla
#endif