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gecko-dev/dom/audiochannel/AudioChannelService.cpp

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/* -*- 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 "AudioChannelService.h"
#include "AudioChannelServiceChild.h"
#include "base/basictypes.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/unused.h"
#include "mozilla/dom/ContentParent.h"
#include "nsThreadUtils.h"
#include "nsHashPropertyBag.h"
#include "nsComponentManagerUtils.h"
#include "nsPIDOMWindow.h"
#include "nsServiceManagerUtils.h"
#ifdef MOZ_WIDGET_GONK
#include "nsJSUtils.h"
#include "nsIAudioManager.h"
#include "SpeakerManagerService.h"
#define NS_AUDIOMANAGER_CONTRACTID "@mozilla.org/telephony/audiomanager;1"
#endif
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::hal;
StaticRefPtr<AudioChannelService> gAudioChannelService;
// Mappings from 'mozaudiochannel' attribute strings to an enumeration.
static const nsAttrValue::EnumTable kMozAudioChannelAttributeTable[] = {
{ "normal", (int16_t)AudioChannel::Normal },
{ "content", (int16_t)AudioChannel::Content },
{ "notification", (int16_t)AudioChannel::Notification },
{ "alarm", (int16_t)AudioChannel::Alarm },
{ "telephony", (int16_t)AudioChannel::Telephony },
{ "ringer", (int16_t)AudioChannel::Ringer },
{ "publicnotification", (int16_t)AudioChannel::Publicnotification },
{ nullptr }
};
// static
AudioChannelService*
AudioChannelService::GetAudioChannelService()
{
MOZ_ASSERT(NS_IsMainThread());
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return AudioChannelServiceChild::GetAudioChannelService();
}
return gAudioChannelService;
}
// static
AudioChannelService*
AudioChannelService::GetOrCreateAudioChannelService()
{
MOZ_ASSERT(NS_IsMainThread());
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return AudioChannelServiceChild::GetOrCreateAudioChannelService();
}
// If we already exist, exit early
if (gAudioChannelService) {
return gAudioChannelService;
}
// Create new instance, register, return
nsRefPtr<AudioChannelService> service = new AudioChannelService();
MOZ_ASSERT(service);
gAudioChannelService = service;
return gAudioChannelService;
}
void
AudioChannelService::Shutdown()
{
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return AudioChannelServiceChild::Shutdown();
}
if (gAudioChannelService) {
gAudioChannelService = nullptr;
}
}
NS_IMPL_ISUPPORTS(AudioChannelService, nsIObserver, nsITimerCallback)
AudioChannelService::AudioChannelService()
: mCurrentHigherChannel(-1)
, mCurrentVisibleHigherChannel(-1)
, mPlayableHiddenContentChildID(CONTENT_PROCESS_ID_UNKNOWN)
, mDisabled(false)
, mDefChannelChildID(CONTENT_PROCESS_ID_UNKNOWN)
{
if (XRE_GetProcessType() == GeckoProcessType_Default) {
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->AddObserver(this, "ipc:content-shutdown", false);
obs->AddObserver(this, "xpcom-shutdown", false);
#ifdef MOZ_WIDGET_GONK
// To monitor the volume settings based on audio channel.
obs->AddObserver(this, "mozsettings-changed", false);
#endif
}
}
}
AudioChannelService::~AudioChannelService()
{
}
void
AudioChannelService::RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
AudioChannel aChannel,
bool aWithVideo)
{
if (mDisabled) {
return;
}
AudioChannelAgentData* data = new AudioChannelAgentData(aChannel,
true /* aElementHidden */,
AUDIO_CHANNEL_STATE_MUTED /* aState */,
aWithVideo);
mAgents.Put(aAgent, data);
RegisterType(aChannel, CONTENT_PROCESS_ID_MAIN, aWithVideo);
// If this is the first agent for this window, we must notify the observers.
uint32_t count = CountWindow(aAgent->Window());
if (count == 1) {
nsCOMPtr<nsIObserverService> observerService =
services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(ToSupports(aAgent->Window()),
"media-playback",
NS_LITERAL_STRING("active").get());
}
}
}
void
AudioChannelService::RegisterType(AudioChannel aChannel, uint64_t aChildID,
bool aWithVideo)
{
if (mDisabled) {
return;
}
AudioChannelInternalType type = GetInternalType(aChannel, true);
mChannelCounters[type].AppendElement(aChildID);
if (XRE_GetProcessType() == GeckoProcessType_Default) {
// We must keep the childIds in order to decide which app is allowed to play
// with then telephony channel.
if (aChannel == AudioChannel::Telephony) {
RegisterTelephonyChild(aChildID);
}
// Since there is another telephony registered, we can unregister old one
// immediately.
if (mDeferTelChannelTimer && aChannel == AudioChannel::Telephony) {
mDeferTelChannelTimer->Cancel();
mDeferTelChannelTimer = nullptr;
UnregisterTypeInternal(aChannel, mTimerElementHidden, mTimerChildID,
false);
}
if (aWithVideo) {
mWithVideoChildIDs.AppendElement(aChildID);
}
// No hidden content channel can be playable if there is a content channel
// in foreground (bug 855208), nor if there is a normal channel with video
// in foreground (bug 894249).
if (type == AUDIO_CHANNEL_INT_CONTENT ||
(type == AUDIO_CHANNEL_INT_NORMAL &&
mWithVideoChildIDs.Contains(aChildID))) {
mPlayableHiddenContentChildID = CONTENT_PROCESS_ID_UNKNOWN;
}
// One hidden content channel can be playable only when there is no any
// content channel in the foreground, and no normal channel with video in
// foreground.
else if (type == AUDIO_CHANNEL_INT_CONTENT_HIDDEN &&
mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty()) {
mPlayableHiddenContentChildID = aChildID;
}
// In order to avoid race conditions, it's safer to notify any existing
// agent any time a new one is registered.
SendAudioChannelChangedNotification(aChildID);
SendNotification();
}
}
void
AudioChannelService::UnregisterAudioChannelAgent(AudioChannelAgent* aAgent)
{
if (mDisabled) {
return;
}
nsAutoPtr<AudioChannelAgentData> data;
mAgents.RemoveAndForget(aAgent, data);
if (data) {
UnregisterType(data->mChannel, data->mElementHidden,
CONTENT_PROCESS_ID_MAIN, data->mWithVideo);
}
#ifdef MOZ_WIDGET_GONK
bool active = AnyAudioChannelIsActive();
for (uint32_t i = 0; i < mSpeakerManager.Length(); i++) {
mSpeakerManager[i]->SetAudioChannelActive(active);
}
#endif
// If this is the last agent for this window, we must notify the observers.
uint32_t count = CountWindow(aAgent->Window());
if (count == 0) {
nsCOMPtr<nsIObserverService> observerService =
services::GetObserverService();
if (observerService) {
observerService->NotifyObservers(ToSupports(aAgent->Window()),
"media-playback",
NS_LITERAL_STRING("inactive").get());
}
}
}
void
AudioChannelService::UnregisterType(AudioChannel aChannel,
bool aElementHidden,
uint64_t aChildID,
bool aWithVideo)
{
if (mDisabled) {
return;
}
// There are two reasons to defer the decrease of telephony channel.
// 1. User can have time to remove device from his ear before music resuming.
// 2. Give BT SCO to be disconnected before starting to connect A2DP.
if (XRE_GetProcessType() == GeckoProcessType_Default) {
if (aChannel == AudioChannel::Telephony) {
UnregisterTelephonyChild(aChildID);
}
if (aChannel == AudioChannel::Telephony &&
(mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN].Length() +
mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY].Length()) == 1) {
mTimerElementHidden = aElementHidden;
mTimerChildID = aChildID;
mDeferTelChannelTimer = do_CreateInstance("@mozilla.org/timer;1");
mDeferTelChannelTimer->InitWithCallback(this, 1500, nsITimer::TYPE_ONE_SHOT);
return;
}
}
UnregisterTypeInternal(aChannel, aElementHidden, aChildID, aWithVideo);
}
void
AudioChannelService::UnregisterTypeInternal(AudioChannel aChannel,
bool aElementHidden,
uint64_t aChildID,
bool aWithVideo)
{
// The array may contain multiple occurrence of this appId but
// this should remove only the first one.
AudioChannelInternalType type = GetInternalType(aChannel, aElementHidden);
MOZ_ASSERT(mChannelCounters[type].Contains(aChildID));
mChannelCounters[type].RemoveElement(aChildID);
// In order to avoid race conditions, it's safer to notify any existing
// agent any time a new one is registered.
if (XRE_GetProcessType() == GeckoProcessType_Default) {
// No hidden content channel is playable if the original playable hidden
// process does not need to play audio from background anymore.
if (aChannel == AudioChannel::Content &&
mPlayableHiddenContentChildID == aChildID &&
!mChannelCounters[AUDIO_CHANNEL_INT_CONTENT_HIDDEN].Contains(aChildID)) {
mPlayableHiddenContentChildID = CONTENT_PROCESS_ID_UNKNOWN;
}
if (aWithVideo) {
MOZ_ASSERT(mWithVideoChildIDs.Contains(aChildID));
mWithVideoChildIDs.RemoveElement(aChildID);
}
SendAudioChannelChangedNotification(aChildID);
SendNotification();
}
}
void
AudioChannelService::UpdateChannelType(AudioChannel aChannel,
uint64_t aChildID,
bool aElementHidden,
bool aElementWasHidden)
{
// Calculate the new and old internal type and update the hashtable if needed.
AudioChannelInternalType newType = GetInternalType(aChannel, aElementHidden);
AudioChannelInternalType oldType = GetInternalType(aChannel, aElementWasHidden);
if (newType != oldType) {
mChannelCounters[newType].AppendElement(aChildID);
MOZ_ASSERT(mChannelCounters[oldType].Contains(aChildID));
mChannelCounters[oldType].RemoveElement(aChildID);
}
// No hidden content channel can be playable if there is a content channel
// in foreground (bug 855208), nor if there is a normal channel with video
// in foreground (bug 894249).
if (newType == AUDIO_CHANNEL_INT_CONTENT ||
(newType == AUDIO_CHANNEL_INT_NORMAL &&
mWithVideoChildIDs.Contains(aChildID))) {
mPlayableHiddenContentChildID = CONTENT_PROCESS_ID_UNKNOWN;
}
// If there is no content channel in foreground and no normal channel with
// video in foreground, the last content channel which goes from foreground
// to background can be playable.
else if (oldType == AUDIO_CHANNEL_INT_CONTENT &&
newType == AUDIO_CHANNEL_INT_CONTENT_HIDDEN &&
mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty()) {
mPlayableHiddenContentChildID = aChildID;
}
}
AudioChannelState
AudioChannelService::GetState(AudioChannelAgent* aAgent, bool aElementHidden)
{
AudioChannelAgentData* data;
if (!mAgents.Get(aAgent, &data)) {
return AUDIO_CHANNEL_STATE_MUTED;
}
bool oldElementHidden = data->mElementHidden;
// Update visibility.
data->mElementHidden = aElementHidden;
data->mState = GetStateInternal(data->mChannel, CONTENT_PROCESS_ID_MAIN,
aElementHidden, oldElementHidden);
return data->mState;
}
AudioChannelState
AudioChannelService::GetStateInternal(AudioChannel aChannel, uint64_t aChildID,
bool aElementHidden,
bool aElementWasHidden)
{
UpdateChannelType(aChannel, aChildID, aElementHidden, aElementWasHidden);
// Calculating the new and old type and update the hashtable if needed.
AudioChannelInternalType newType = GetInternalType(aChannel, aElementHidden);
AudioChannelInternalType oldType = GetInternalType(aChannel,
aElementWasHidden);
if (newType != oldType &&
(aChannel == AudioChannel::Content ||
(aChannel == AudioChannel::Normal &&
mWithVideoChildIDs.Contains(aChildID)))) {
SendNotification();
}
SendAudioChannelChangedNotification(aChildID);
// Let play any visible audio channel.
if (!aElementHidden) {
if (CheckVolumeFadedCondition(newType, aElementHidden)) {
return AUDIO_CHANNEL_STATE_FADED;
}
return CheckTelephonyPolicy(aChannel, aChildID);
}
// We are not visible, maybe we have to mute.
if (newType == AUDIO_CHANNEL_INT_NORMAL_HIDDEN ||
(newType == AUDIO_CHANNEL_INT_CONTENT_HIDDEN &&
// One process can have multiple content channels; and during the
// transition from foreground to background, its content channels will be
// updated with correct visibility status one by one. All its content
// channels should remain playable until all of their visibility statuses
// have been updated as hidden. After all its content channels have been
// updated properly as hidden, mPlayableHiddenContentChildID is used to
// check whether this background process is playable or not.
!(mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].Contains(aChildID) ||
(mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty() &&
mPlayableHiddenContentChildID == aChildID)))) {
return AUDIO_CHANNEL_STATE_MUTED;
}
// After checking the condition on normal & content channel, if the state
// is not on muted then checking other higher channels type here.
if (ChannelsActiveWithHigherPriorityThan(newType)) {
MOZ_ASSERT(newType != AUDIO_CHANNEL_INT_NORMAL_HIDDEN);
if (CheckVolumeFadedCondition(newType, aElementHidden)) {
return AUDIO_CHANNEL_STATE_FADED;
}
return AUDIO_CHANNEL_STATE_MUTED;
}
return CheckTelephonyPolicy(aChannel, aChildID);
}
AudioChannelState
AudioChannelService::CheckTelephonyPolicy(AudioChannel aChannel,
uint64_t aChildID)
{
// Only the latest childID is allowed to play with telephony channel.
if (aChannel != AudioChannel::Telephony) {
return AUDIO_CHANNEL_STATE_NORMAL;
}
MOZ_ASSERT(!mTelephonyChildren.IsEmpty());
#if DEBUG
bool found = false;
for (uint32_t i = 0, len = mTelephonyChildren.Length(); i < len; ++i) {
if (mTelephonyChildren[i].mChildID == aChildID) {
found = true;
break;
}
}
MOZ_ASSERT(found);
#endif
return mTelephonyChildren.LastElement().mChildID == aChildID
? AUDIO_CHANNEL_STATE_NORMAL : AUDIO_CHANNEL_STATE_MUTED;
}
bool
AudioChannelService::CheckVolumeFadedCondition(AudioChannelInternalType aType,
bool aElementHidden)
{
// Only normal & content channels are considered
if (aType > AUDIO_CHANNEL_INT_CONTENT_HIDDEN) {
return false;
}
// Consider that audio from notification is with short duration
// so just fade the volume not pause it
if (mChannelCounters[AUDIO_CHANNEL_INT_NOTIFICATION].IsEmpty() &&
mChannelCounters[AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN].IsEmpty()) {
return false;
}
// Since this element is on the foreground, it can be allowed to play always.
// So return true directly when there is any notification channel alive.
if (aElementHidden == false) {
return true;
}
// If element is on the background, it is possible paused by channels higher
// then notification.
for (int i = AUDIO_CHANNEL_INT_LAST - 1;
i != AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN; --i) {
if (!mChannelCounters[i].IsEmpty()) {
return false;
}
}
return true;
}
bool
AudioChannelService::ContentOrNormalChannelIsActive()
{
return !mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty() ||
!mChannelCounters[AUDIO_CHANNEL_INT_CONTENT_HIDDEN].IsEmpty() ||
!mChannelCounters[AUDIO_CHANNEL_INT_NORMAL].IsEmpty();
}
bool
AudioChannelService::TelephonyChannelIsActive()
{
return !mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY].IsEmpty() ||
!mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN].IsEmpty();
}
bool
AudioChannelService::ProcessContentOrNormalChannelIsActive(uint64_t aChildID)
{
return mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].Contains(aChildID) ||
mChannelCounters[AUDIO_CHANNEL_INT_CONTENT_HIDDEN].Contains(aChildID) ||
mChannelCounters[AUDIO_CHANNEL_INT_NORMAL].Contains(aChildID);
}
void
AudioChannelService::SetDefaultVolumeControlChannel(int32_t aChannel,
bool aHidden)
{
SetDefaultVolumeControlChannelInternal(aChannel, aHidden,
CONTENT_PROCESS_ID_MAIN);
}
void
AudioChannelService::SetDefaultVolumeControlChannelInternal(int32_t aChannel,
bool aHidden,
uint64_t aChildID)
{
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return;
}
// If this child is in the background and mDefChannelChildID is set to
// others then it means other child in the foreground already set it's
// own default channel already.
if (!aHidden && mDefChannelChildID != aChildID) {
return;
}
mDefChannelChildID = aChildID;
nsString channelName;
if (aChannel == -1) {
channelName.AssignASCII("unknown");
} else {
GetAudioChannelString(static_cast<AudioChannel>(aChannel), channelName);
}
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "default-volume-channel-changed",
channelName.get());
}
}
void
AudioChannelService::SendAudioChannelChangedNotification(uint64_t aChildID)
{
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return;
}
nsRefPtr<nsHashPropertyBag> props = new nsHashPropertyBag();
props->SetPropertyAsUint64(NS_LITERAL_STRING("childID"), aChildID);
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(static_cast<nsIWritablePropertyBag*>(props),
"audio-channel-process-changed", nullptr);
}
// Calculating the most important active channel.
int32_t higher = -1;
// Top-Down in the hierarchy for visible elements
if (!mChannelCounters[AUDIO_CHANNEL_INT_PUBLICNOTIFICATION].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Publicnotification);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_RINGER].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Ringer);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Telephony);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_ALARM].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Alarm);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_NOTIFICATION].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Notification);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Content);
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_NORMAL].IsEmpty()) {
higher = static_cast<int32_t>(AudioChannel::Normal);
}
int32_t visibleHigher = higher;
// Top-Down in the hierarchy for non-visible elements
// And we can ignore normal channel because it can't play in the background.
int32_t index;
for (index = 0; kMozAudioChannelAttributeTable[index].tag; ++index);
for (--index;
kMozAudioChannelAttributeTable[index].value > higher &&
kMozAudioChannelAttributeTable[index].value > (int16_t)AudioChannel::Normal;
--index) {
// Each channel type will be split to fg and bg for recording the state,
// so here need to do a translation.
if (mChannelCounters[index * 2 + 1].IsEmpty()) {
continue;
}
if (kMozAudioChannelAttributeTable[index].value == (int16_t)AudioChannel::Content) {
if (mPlayableHiddenContentChildID != CONTENT_PROCESS_ID_UNKNOWN) {
higher = kMozAudioChannelAttributeTable[index].value;
break;
}
} else {
higher = kMozAudioChannelAttributeTable[index].value;
break;
}
}
if (higher != mCurrentHigherChannel) {
mCurrentHigherChannel = higher;
nsString channelName;
if (mCurrentHigherChannel != -1) {
GetAudioChannelString(static_cast<AudioChannel>(mCurrentHigherChannel),
channelName);
} else {
channelName.AssignLiteral("none");
}
if (obs) {
obs->NotifyObservers(nullptr, "audio-channel-changed", channelName.get());
}
}
if (visibleHigher != mCurrentVisibleHigherChannel) {
mCurrentVisibleHigherChannel = visibleHigher;
nsString channelName;
if (mCurrentVisibleHigherChannel != -1) {
GetAudioChannelString(static_cast<AudioChannel>(mCurrentVisibleHigherChannel),
channelName);
} else {
channelName.AssignLiteral("none");
}
if (obs) {
obs->NotifyObservers(nullptr, "visible-audio-channel-changed", channelName.get());
}
}
}
PLDHashOperator
AudioChannelService::NotifyEnumerator(AudioChannelAgent* aAgent,
AudioChannelAgentData* aData, void* aUnused)
{
MOZ_ASSERT(aAgent);
aAgent->NotifyAudioChannelStateChanged();
return PL_DHASH_NEXT;
}
class NotifyRunnable : public nsRunnable
{
public:
explicit NotifyRunnable(AudioChannelService* aService)
: mService(aService)
{}
NS_IMETHOD Run()
{
mService->Notify();
return NS_OK;
}
private:
nsRefPtr<AudioChannelService> mService;
};
void
AudioChannelService::SendNotification()
{
MOZ_ASSERT(NS_IsMainThread());
if (mRunnable) {
return;
}
mRunnable = new NotifyRunnable(this);
NS_DispatchToCurrentThread(mRunnable);
}
void
AudioChannelService::Notify()
{
MOZ_ASSERT(NS_IsMainThread());
mRunnable = nullptr;
// Notify any agent for the main process.
mAgents.EnumerateRead(NotifyEnumerator, nullptr);
// Notify for the child processes.
nsTArray<ContentParent*> children;
ContentParent::GetAll(children);
for (uint32_t i = 0; i < children.Length(); i++) {
unused << children[i]->SendAudioChannelNotify();
}
}
NS_IMETHODIMP
AudioChannelService::Notify(nsITimer* aTimer)
{
UnregisterTypeInternal(AudioChannel::Telephony, mTimerElementHidden,
mTimerChildID, false);
mDeferTelChannelTimer = nullptr;
return NS_OK;
}
bool
AudioChannelService::AnyAudioChannelIsActive()
{
for (int i = AUDIO_CHANNEL_INT_LAST - 1;
i >= AUDIO_CHANNEL_INT_NORMAL; --i) {
if (!mChannelCounters[i].IsEmpty()) {
return true;
}
}
return false;
}
bool
AudioChannelService::ChannelsActiveWithHigherPriorityThan(
AudioChannelInternalType aType)
{
for (int i = AUDIO_CHANNEL_INT_LAST - 1;
i != AUDIO_CHANNEL_INT_CONTENT_HIDDEN; --i) {
if (i == aType) {
return false;
}
if (!mChannelCounters[i].IsEmpty()) {
return true;
}
}
return false;
}
NS_IMETHODIMP
AudioChannelService::Observe(nsISupports* aSubject, const char* aTopic, const char16_t* aData)
{
if (!strcmp(aTopic, "xpcom-shutdown")) {
mDisabled = true;
}
if (!strcmp(aTopic, "ipc:content-shutdown")) {
nsCOMPtr<nsIPropertyBag2> props = do_QueryInterface(aSubject);
if (!props) {
NS_WARNING("ipc:content-shutdown message without property bag as subject");
return NS_OK;
}
int32_t index;
uint64_t childID = 0;
nsresult rv = props->GetPropertyAsUint64(NS_LITERAL_STRING("childID"),
&childID);
if (NS_SUCCEEDED(rv)) {
for (int32_t type = AUDIO_CHANNEL_INT_NORMAL;
type < AUDIO_CHANNEL_INT_LAST;
++type) {
while ((index = mChannelCounters[type].IndexOf(childID)) != -1) {
mChannelCounters[type].RemoveElementAt(index);
}
}
// No hidden content channel is playable if the original playable hidden
// process shuts down.
if (mPlayableHiddenContentChildID == childID) {
mPlayableHiddenContentChildID = CONTENT_PROCESS_ID_UNKNOWN;
}
while ((index = mWithVideoChildIDs.IndexOf(childID)) != -1) {
mWithVideoChildIDs.RemoveElementAt(index);
}
// We don't have to remove the agents from the mAgents hashtable because if
// that table contains only agents running on the same process.
SendAudioChannelChangedNotification(childID);
SendNotification();
if (mDefChannelChildID == childID) {
SetDefaultVolumeControlChannelInternal(-1, false, childID);
mDefChannelChildID = CONTENT_PROCESS_ID_UNKNOWN;
}
} else {
NS_WARNING("ipc:content-shutdown message without childID property");
}
}
#ifdef MOZ_WIDGET_GONK
// To process the volume control on each audio channel according to
// change of settings
else if (!strcmp(aTopic, "mozsettings-changed")) {
AutoSafeJSContext cx;
nsDependentString dataStr(aData);
JS::Rooted<JS::Value> val(cx);
if (!JS_ParseJSON(cx, dataStr.get(), dataStr.Length(), &val) ||
!val.isObject()) {
return NS_OK;
}
JS::Rooted<JSObject*> obj(cx, &val.toObject());
JS::Rooted<JS::Value> key(cx);
if (!JS_GetProperty(cx, obj, "key", &key) ||
!key.isString()) {
return NS_OK;
}
JS::Rooted<JSString*> jsKey(cx, JS::ToString(cx, key));
if (!jsKey) {
return NS_OK;
}
nsAutoJSString keyStr;
if (!keyStr.init(cx, jsKey) || keyStr.Find("audio.volume.", 0, false)) {
return NS_OK;
}
JS::Rooted<JS::Value> value(cx);
if (!JS_GetProperty(cx, obj, "value", &value) || !value.isInt32()) {
return NS_OK;
}
nsCOMPtr<nsIAudioManager> audioManager = do_GetService(NS_AUDIOMANAGER_CONTRACTID);
NS_ENSURE_TRUE(audioManager, NS_OK);
int32_t index = value.toInt32();
if (keyStr.EqualsLiteral("audio.volume.content")) {
audioManager->SetAudioChannelVolume((int32_t)AudioChannel::Content, index);
} else if (keyStr.EqualsLiteral("audio.volume.notification")) {
audioManager->SetAudioChannelVolume((int32_t)AudioChannel::Notification, index);
} else if (keyStr.EqualsLiteral("audio.volume.alarm")) {
audioManager->SetAudioChannelVolume((int32_t)AudioChannel::Alarm, index);
} else if (keyStr.EqualsLiteral("audio.volume.telephony")) {
audioManager->SetAudioChannelVolume((int32_t)AudioChannel::Telephony, index);
} else if (!keyStr.EqualsLiteral("audio.volume.bt_sco")) {
// bt_sco is not a valid audio channel so we manipulate it in
// AudioManager.cpp. And the others should not be used.
// We didn't use MOZ_CRASH or MOZ_MAKE_COMPILER_ASSUME_IS_UNREACHABLE here
// because any web content who has permission of mozSettings can set any
// names then it can be easy to crash the B2G.
NS_WARNING("unexpected audio channel for volume control");
}
}
#endif
return NS_OK;
}
AudioChannelService::AudioChannelInternalType
AudioChannelService::GetInternalType(AudioChannel aChannel,
bool aElementHidden)
{
switch (aChannel) {
case AudioChannel::Normal:
return aElementHidden
? AUDIO_CHANNEL_INT_NORMAL_HIDDEN
: AUDIO_CHANNEL_INT_NORMAL;
case AudioChannel::Content:
return aElementHidden
? AUDIO_CHANNEL_INT_CONTENT_HIDDEN
: AUDIO_CHANNEL_INT_CONTENT;
case AudioChannel::Notification:
return aElementHidden
? AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN
: AUDIO_CHANNEL_INT_NOTIFICATION;
case AudioChannel::Alarm:
return aElementHidden
? AUDIO_CHANNEL_INT_ALARM_HIDDEN
: AUDIO_CHANNEL_INT_ALARM;
case AudioChannel::Telephony:
return aElementHidden
? AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN
: AUDIO_CHANNEL_INT_TELEPHONY;
case AudioChannel::Ringer:
return aElementHidden
? AUDIO_CHANNEL_INT_RINGER_HIDDEN
: AUDIO_CHANNEL_INT_RINGER;
case AudioChannel::Publicnotification:
return aElementHidden
? AUDIO_CHANNEL_INT_PUBLICNOTIFICATION_HIDDEN
: AUDIO_CHANNEL_INT_PUBLICNOTIFICATION;
default:
break;
}
MOZ_CRASH("unexpected audio channel");
}
struct RefreshAgentsVolumeData
{
explicit RefreshAgentsVolumeData(nsPIDOMWindow* aWindow)
: mWindow(aWindow)
{}
nsPIDOMWindow* mWindow;
nsTArray<nsRefPtr<AudioChannelAgent>> mAgents;
};
PLDHashOperator
AudioChannelService::RefreshAgentsVolumeEnumerator(AudioChannelAgent* aAgent,
AudioChannelAgentData* aUnused,
void* aPtr)
{
MOZ_ASSERT(aAgent);
RefreshAgentsVolumeData* data = static_cast<RefreshAgentsVolumeData*>(aPtr);
MOZ_ASSERT(data);
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aAgent->Window());
if (window && !window->IsInnerWindow()) {
window = window->GetCurrentInnerWindow();
}
if (window == data->mWindow) {
data->mAgents.AppendElement(aAgent);
}
return PL_DHASH_NEXT;
}
void
AudioChannelService::RefreshAgentsVolume(nsPIDOMWindow* aWindow)
{
RefreshAgentsVolumeData data(aWindow);
mAgents.EnumerateRead(RefreshAgentsVolumeEnumerator, &data);
for (uint32_t i = 0; i < data.mAgents.Length(); ++i) {
data.mAgents[i]->WindowVolumeChanged();
}
}
struct CountWindowData
{
explicit CountWindowData(nsIDOMWindow* aWindow)
: mWindow(aWindow)
, mCount(0)
{}
nsIDOMWindow* mWindow;
uint32_t mCount;
};
PLDHashOperator
AudioChannelService::CountWindowEnumerator(AudioChannelAgent* aAgent,
AudioChannelAgentData* aUnused,
void* aPtr)
{
CountWindowData* data = static_cast<CountWindowData*>(aPtr);
MOZ_ASSERT(aAgent);
if (aAgent->Window() == data->mWindow) {
++data->mCount;
}
return PL_DHASH_NEXT;
}
uint32_t
AudioChannelService::CountWindow(nsIDOMWindow* aWindow)
{
CountWindowData data(aWindow);
mAgents.EnumerateRead(CountWindowEnumerator, &data);
return data.mCount;
}
/* static */ const nsAttrValue::EnumTable*
AudioChannelService::GetAudioChannelTable()
{
return kMozAudioChannelAttributeTable;
}
/* static */ AudioChannel
AudioChannelService::GetAudioChannel(const nsAString& aChannel)
{
for (uint32_t i = 0; kMozAudioChannelAttributeTable[i].tag; ++i) {
if (aChannel.EqualsASCII(kMozAudioChannelAttributeTable[i].tag)) {
return static_cast<AudioChannel>(kMozAudioChannelAttributeTable[i].value);
}
}
return AudioChannel::Normal;
}
/* static */ AudioChannel
AudioChannelService::GetDefaultAudioChannel()
{
nsString audioChannel = Preferences::GetString("media.defaultAudioChannel");
if (audioChannel.IsEmpty()) {
return AudioChannel::Normal;
}
for (uint32_t i = 0; kMozAudioChannelAttributeTable[i].tag; ++i) {
if (audioChannel.EqualsASCII(kMozAudioChannelAttributeTable[i].tag)) {
return static_cast<AudioChannel>(kMozAudioChannelAttributeTable[i].value);
}
}
return AudioChannel::Normal;
}
/* static */ void
AudioChannelService::GetAudioChannelString(AudioChannel aChannel,
nsAString& aString)
{
aString.AssignASCII("normal");
for (uint32_t i = 0; kMozAudioChannelAttributeTable[i].tag; ++i) {
if (aChannel ==
static_cast<AudioChannel>(kMozAudioChannelAttributeTable[i].value)) {
aString.AssignASCII(kMozAudioChannelAttributeTable[i].tag);
break;
}
}
}
/* static */ void
AudioChannelService::GetDefaultAudioChannelString(nsAString& aString)
{
aString.AssignASCII("normal");
nsString audioChannel = Preferences::GetString("media.defaultAudioChannel");
if (!audioChannel.IsEmpty()) {
for (uint32_t i = 0; kMozAudioChannelAttributeTable[i].tag; ++i) {
if (audioChannel.EqualsASCII(kMozAudioChannelAttributeTable[i].tag)) {
aString = audioChannel;
break;
}
}
}
}
void
AudioChannelService::RegisterTelephonyChild(uint64_t aChildID)
{
for (uint32_t i = 0, len = mTelephonyChildren.Length(); i < len; ++i) {
if (mTelephonyChildren[i].mChildID == aChildID) {
++mTelephonyChildren[i].mInstances;
if (i != len - 1) {
TelephonyChild child = mTelephonyChildren[i];
mTelephonyChildren.RemoveElementAt(i);
mTelephonyChildren.AppendElement(child);
}
return;
}
}
mTelephonyChildren.AppendElement(TelephonyChild(aChildID));
}
void
AudioChannelService::UnregisterTelephonyChild(uint64_t aChildID)
{
for (uint32_t i = 0, len = mTelephonyChildren.Length(); i < len; ++i) {
if (mTelephonyChildren[i].mChildID == aChildID) {
if (!--mTelephonyChildren[i].mInstances) {
mTelephonyChildren.RemoveElementAt(i);
}
return;
}
}
MOZ_ASSERT(false, "This should not happen.");
}
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