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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 "nsServiceManagerUtils.h"
#ifdef MOZ_WIDGET_GONK
#include "nsJSUtils.h"
#include "nsCxPusher.h"
#include "nsIAudioManager.h"
#include "SpeakerManagerService.h"
#define NS_AUDIOMANAGER_CONTRACTID "@mozilla.org/telephony/audiomanager;1"
#endif
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::hal;
StaticRefPtr<AudioChannelService> gAudioChannelService;
// static
AudioChannelService*
AudioChannelService::GetAudioChannelService()
{
MOZ_ASSERT(NS_IsMainThread());
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return AudioChannelServiceChild::GetAudioChannelService();
}
// If we already exist, exit early
if (gAudioChannelService) {
return gAudioChannelService;
}
// Create new instance, register, return
nsRefPtr<AudioChannelService> service = new AudioChannelService();
NS_ENSURE_TRUE(service, nullptr);
gAudioChannelService = service;
return gAudioChannelService;
}
void
AudioChannelService::Shutdown()
{
if (XRE_GetProcessType() != GeckoProcessType_Default) {
return AudioChannelServiceChild::Shutdown();
}
if (gAudioChannelService) {
gAudioChannelService = nullptr;
}
}
NS_IMPL_ISUPPORTS2(AudioChannelService, nsIObserver, nsITimerCallback)
AudioChannelService::AudioChannelService()
: mCurrentHigherChannel(AUDIO_CHANNEL_LAST)
, mCurrentVisibleHigherChannel(AUDIO_CHANNEL_LAST)
, 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,
AudioChannelType aType,
bool aWithVideo)
{
if (mDisabled) {
return;
}
MOZ_ASSERT(aType != AUDIO_CHANNEL_DEFAULT);
AudioChannelAgentData* data = new AudioChannelAgentData(aType,
true /* aElementHidden */,
AUDIO_CHANNEL_STATE_MUTED /* aState */,
aWithVideo);
mAgents.Put(aAgent, data);
RegisterType(aType, CONTENT_PROCESS_ID_MAIN, aWithVideo);
}
void
AudioChannelService::RegisterType(AudioChannelType aType, uint64_t aChildID, bool aWithVideo)
{
if (mDisabled) {
return;
}
AudioChannelInternalType type = GetInternalType(aType, true);
mChannelCounters[type].AppendElement(aChildID);
if (XRE_GetProcessType() == GeckoProcessType_Default) {
// Since there is another telephony registered, we can unregister old one
// immediately.
if (mDeferTelChannelTimer && aType == AUDIO_CHANNEL_TELEPHONY) {
mDeferTelChannelTimer->Cancel();
mDeferTelChannelTimer = nullptr;
UnregisterTypeInternal(aType, 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);
Notify();
}
}
void
AudioChannelService::UnregisterAudioChannelAgent(AudioChannelAgent* aAgent)
{
if (mDisabled) {
return;
}
nsAutoPtr<AudioChannelAgentData> data;
mAgents.RemoveAndForget(aAgent, data);
if (data) {
UnregisterType(data->mType, 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
}
void
AudioChannelService::UnregisterType(AudioChannelType aType,
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 &&
aType == AUDIO_CHANNEL_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(aType, aElementHidden, aChildID, aWithVideo);
}
void
AudioChannelService::UnregisterTypeInternal(AudioChannelType aType,
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(aType, 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 (aType == AUDIO_CHANNEL_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);
Notify();
}
}
void
AudioChannelService::UpdateChannelType(AudioChannelType aType,
uint64_t aChildID,
bool aElementHidden,
bool aElementWasHidden)
{
// Calculate the new and old internal type and update the hashtable if needed.
AudioChannelInternalType newType = GetInternalType(aType, aElementHidden);
AudioChannelInternalType oldType = GetInternalType(aType, 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->mType, CONTENT_PROCESS_ID_MAIN,
aElementHidden, oldElementHidden);
return data->mState;
}
AudioChannelState
AudioChannelService::GetStateInternal(AudioChannelType aType, uint64_t aChildID,
bool aElementHidden, bool aElementWasHidden)
{
UpdateChannelType(aType, aChildID, aElementHidden, aElementWasHidden);
// Calculating the new and old type and update the hashtable if needed.
AudioChannelInternalType newType = GetInternalType(aType, aElementHidden);
AudioChannelInternalType oldType = GetInternalType(aType, aElementWasHidden);
if (newType != oldType &&
(aType == AUDIO_CHANNEL_CONTENT ||
(aType == AUDIO_CHANNEL_NORMAL &&
mWithVideoChildIDs.Contains(aChildID)))) {
Notify();
}
SendAudioChannelChangedNotification(aChildID);
// Let play any visible audio channel.
if (!aElementHidden) {
if (CheckVolumeFadedCondition(newType, aElementHidden)) {
return AUDIO_CHANNEL_STATE_FADED;
}
return AUDIO_CHANNEL_STATE_NORMAL;
}
// 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 AUDIO_CHANNEL_STATE_NORMAL;
}
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::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(AudioChannelType aType,
bool aHidden)
{
SetDefaultVolumeControlChannelInternal(aType, aHidden, CONTENT_PROCESS_ID_MAIN);
}
void
AudioChannelService::SetDefaultVolumeControlChannelInternal(
AudioChannelType aType, 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;
channelName.AssignASCII(ChannelName(aType));
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.
AudioChannelType higher = AUDIO_CHANNEL_LAST;
// Top-Down in the hierarchy for visible elements
if (!mChannelCounters[AUDIO_CHANNEL_INT_PUBLICNOTIFICATION].IsEmpty()) {
higher = AUDIO_CHANNEL_PUBLICNOTIFICATION;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_RINGER].IsEmpty()) {
higher = AUDIO_CHANNEL_RINGER;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY].IsEmpty()) {
higher = AUDIO_CHANNEL_TELEPHONY;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_ALARM].IsEmpty()) {
higher = AUDIO_CHANNEL_ALARM;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_NOTIFICATION].IsEmpty()) {
higher = AUDIO_CHANNEL_NOTIFICATION;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_CONTENT].IsEmpty()) {
higher = AUDIO_CHANNEL_CONTENT;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_NORMAL].IsEmpty()) {
higher = AUDIO_CHANNEL_NORMAL;
}
AudioChannelType visibleHigher = higher;
// Top-Down in the hierarchy for non-visible elements
if (higher == AUDIO_CHANNEL_LAST) {
if (!mChannelCounters[AUDIO_CHANNEL_INT_PUBLICNOTIFICATION_HIDDEN].IsEmpty()) {
higher = AUDIO_CHANNEL_PUBLICNOTIFICATION;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_RINGER_HIDDEN].IsEmpty()) {
higher = AUDIO_CHANNEL_RINGER;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN].IsEmpty()) {
higher = AUDIO_CHANNEL_TELEPHONY;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_ALARM_HIDDEN].IsEmpty()) {
higher = AUDIO_CHANNEL_ALARM;
}
else if (!mChannelCounters[AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN].IsEmpty()) {
higher = AUDIO_CHANNEL_NOTIFICATION;
}
// Check whether there is any playable hidden content channel or not.
else if (mPlayableHiddenContentChildID != CONTENT_PROCESS_ID_UNKNOWN) {
higher = AUDIO_CHANNEL_CONTENT;
}
}
if (higher != mCurrentHigherChannel) {
mCurrentHigherChannel = higher;
nsString channelName;
if (mCurrentHigherChannel != AUDIO_CHANNEL_LAST) {
channelName.AssignASCII(ChannelName(mCurrentHigherChannel));
} else {
channelName.AssignLiteral("none");
}
if (obs) {
obs->NotifyObservers(nullptr, "audio-channel-changed", channelName.get());
}
}
if (visibleHigher != mCurrentVisibleHigherChannel) {
mCurrentVisibleHigherChannel = visibleHigher;
nsString channelName;
if (mCurrentVisibleHigherChannel != AUDIO_CHANNEL_LAST) {
channelName.AssignASCII(ChannelName(mCurrentVisibleHigherChannel));
} 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;
}
void
AudioChannelService::Notify()
{
MOZ_ASSERT(NS_IsMainThread());
// 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(AUDIO_CHANNEL_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;
}
const char*
AudioChannelService::ChannelName(AudioChannelType aType)
{
static struct {
int32_t type;
const char* value;
} ChannelNameTable[] = {
{ AUDIO_CHANNEL_NORMAL, "normal" },
{ AUDIO_CHANNEL_CONTENT, "content" },
{ AUDIO_CHANNEL_NOTIFICATION, "notification" },
{ AUDIO_CHANNEL_ALARM, "alarm" },
{ AUDIO_CHANNEL_TELEPHONY, "telephony" },
{ AUDIO_CHANNEL_RINGER, "ringer" },
{ AUDIO_CHANNEL_PUBLICNOTIFICATION, "publicnotification" },
{ -1, "unknown" }
};
for (int i = AUDIO_CHANNEL_NORMAL; ; ++i) {
if (ChannelNameTable[i].type == aType ||
ChannelNameTable[i].type == -1) {
return ChannelNameTable[i].value;
}
}
NS_NOTREACHED("Execution should not reach here!");
return nullptr;
}
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);
Notify();
if (mDefChannelChildID == childID) {
SetDefaultVolumeControlChannelInternal(AUDIO_CHANNEL_DEFAULT,
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;
}
nsDependentJSString 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(AUDIO_CHANNEL_CONTENT, index);
} else if (keyStr.EqualsLiteral("audio.volume.notification")) {
audioManager->SetAudioChannelVolume(AUDIO_CHANNEL_NOTIFICATION, index);
} else if (keyStr.EqualsLiteral("audio.volume.alarm")) {
audioManager->SetAudioChannelVolume(AUDIO_CHANNEL_ALARM, index);
} else if (keyStr.EqualsLiteral("audio.volume.telephony")) {
audioManager->SetAudioChannelVolume(AUDIO_CHANNEL_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_ASSUME_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(AudioChannelType aType,
bool aElementHidden)
{
switch (aType) {
case AUDIO_CHANNEL_NORMAL:
return aElementHidden
? AUDIO_CHANNEL_INT_NORMAL_HIDDEN
: AUDIO_CHANNEL_INT_NORMAL;
case AUDIO_CHANNEL_CONTENT:
return aElementHidden
? AUDIO_CHANNEL_INT_CONTENT_HIDDEN
: AUDIO_CHANNEL_INT_CONTENT;
case AUDIO_CHANNEL_NOTIFICATION:
return aElementHidden
? AUDIO_CHANNEL_INT_NOTIFICATION_HIDDEN
: AUDIO_CHANNEL_INT_NOTIFICATION;
case AUDIO_CHANNEL_ALARM:
return aElementHidden
? AUDIO_CHANNEL_INT_ALARM_HIDDEN
: AUDIO_CHANNEL_INT_ALARM;
case AUDIO_CHANNEL_TELEPHONY:
return aElementHidden
? AUDIO_CHANNEL_INT_TELEPHONY_HIDDEN
: AUDIO_CHANNEL_INT_TELEPHONY;
case AUDIO_CHANNEL_RINGER:
return aElementHidden
? AUDIO_CHANNEL_INT_RINGER_HIDDEN
: AUDIO_CHANNEL_INT_RINGER;
case AUDIO_CHANNEL_PUBLICNOTIFICATION:
return aElementHidden
? AUDIO_CHANNEL_INT_PUBLICNOTIFICATION_HIDDEN
: AUDIO_CHANNEL_INT_PUBLICNOTIFICATION;
case AUDIO_CHANNEL_LAST:
default:
break;
}
MOZ_CRASH("unexpected audio channel type");
}
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