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/* 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,
#include "MediaStatusManager.h"
#include "MediaControlService.h"
#include "mozilla/dom/CanonicalBrowsingContext.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/MediaControlUtils.h"
#include "mozilla/dom/WindowGlobalParent.h"
#include "mozilla/StaticPrefs_media.h"
#include "nsContentUtils.h"
#include "nsIChromeRegistry.h"
#include "nsIObserverService.h"
#include "nsIXULAppInfo.h"
#include "nsNetUtil.h"
#ifdef MOZ_PLACES
# include "nsIFaviconService.h"
#endif // MOZ_PLACES
extern mozilla::LazyLogModule gMediaControlLog;
// avoid redefined macro in unified build
#undef LOG
#define LOG(msg, ...) \
MOZ_LOG(gMediaControlLog, LogLevel::Debug, \
("MediaStatusManager=%p, " msg, this, ##__VA_ARGS__))
namespace mozilla::dom {
static bool IsMetadataEmpty(const Maybe<MediaMetadataBase>& aMetadata) {
// Media session's metadata is null.
if (!aMetadata) {
return true;
}
// All attirbutes in metadata are empty.
const MediaMetadataBase& metadata = *aMetadata;
return metadata.mTitle.IsEmpty() && metadata.mArtist.IsEmpty() &&
metadata.mAlbum.IsEmpty() && metadata.mArtwork.IsEmpty();
}
MediaStatusManager::MediaStatusManager(uint64_t aBrowsingContextId)
: mTopLevelBrowsingContextId(aBrowsingContextId) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess(),
"MediaStatusManager only runs on Chrome process!");
}
void MediaStatusManager::NotifyMediaAudibleChanged(uint64_t aBrowsingContextId,
MediaAudibleState aState) {
Maybe<uint64_t> oldAudioFocusOwnerId =
mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
mPlaybackStatusDelegate.UpdateMediaAudibleState(aBrowsingContextId, aState);
Maybe<uint64_t> newAudioFocusOwnerId =
mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
if (oldAudioFocusOwnerId != newAudioFocusOwnerId) {
HandleAudioFocusOwnerChanged(newAudioFocusOwnerId);
}
}
void MediaStatusManager::NotifySessionCreated(uint64_t aBrowsingContextId) {
const bool created = mMediaSessionInfoMap.WithEntryHandle(
aBrowsingContextId, [&](auto&& entry) {
if (entry) return false;
LOG("Session %" PRIu64 " has been created", aBrowsingContextId);
entry.Insert(MediaSessionInfo::EmptyInfo());
return true;
});
if (created && IsSessionOwningAudioFocus(aBrowsingContextId)) {
// This can't be done from within the WithEntryHandle functor, since it
// accesses mMediaSessionInfoMap.
SetActiveMediaSessionContextId(aBrowsingContextId);
}
}
void MediaStatusManager::NotifySessionDestroyed(uint64_t aBrowsingContextId) {
if (mMediaSessionInfoMap.Remove(aBrowsingContextId)) {
LOG("Session %" PRIu64 " has been destroyed", aBrowsingContextId);
if (mActiveMediaSessionContextId &&
*mActiveMediaSessionContextId == aBrowsingContextId) {
ClearActiveMediaSessionContextIdIfNeeded();
}
}
}
void MediaStatusManager::UpdateMetadata(
uint64_t aBrowsingContextId, const Maybe<MediaMetadataBase>& aMetadata) {
auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
if (!info) {
return;
}
if (IsMetadataEmpty(aMetadata)) {
LOG("Reset metadata for session %" PRIu64, aBrowsingContextId);
info->mMetadata.reset();
} else {
LOG("Update metadata for session %" PRIu64 " title=%s artist=%s album=%s",
aBrowsingContextId, NS_ConvertUTF16toUTF8((*aMetadata).mTitle).get(),
NS_ConvertUTF16toUTF8(aMetadata->mArtist).get(),
NS_ConvertUTF16toUTF8(aMetadata->mAlbum).get());
info->mMetadata = aMetadata;
}
// Only notify the event if the changed metadata belongs to the active media
// session.
if (mActiveMediaSessionContextId &&
*mActiveMediaSessionContextId == aBrowsingContextId) {
LOG("Notify metadata change for active session %" PRIu64,
aBrowsingContextId);
mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
}
if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
obs->NotifyObservers(nullptr, "media-session-controller-metadata-changed",
nullptr);
}
}
}
void MediaStatusManager::HandleAudioFocusOwnerChanged(
Maybe<uint64_t>& aBrowsingContextId) {
// No one is holding the audio focus.
if (!aBrowsingContextId) {
LOG("No one is owning audio focus");
return ClearActiveMediaSessionContextIdIfNeeded();
}
// This owner of audio focus doesn't have media session, so we should deactive
// the active session because the active session must own the audio focus.
if (!mMediaSessionInfoMap.Contains(*aBrowsingContextId)) {
LOG("The owner of audio focus doesn't have media session");
return ClearActiveMediaSessionContextIdIfNeeded();
}
// This owner has media session so it should become an active session context.
SetActiveMediaSessionContextId(*aBrowsingContextId);
}
void MediaStatusManager::SetActiveMediaSessionContextId(
uint64_t aBrowsingContextId) {
if (mActiveMediaSessionContextId &&
*mActiveMediaSessionContextId == aBrowsingContextId) {
LOG("Active session context %" PRIu64 " keeps unchanged",
*mActiveMediaSessionContextId);
return;
}
mActiveMediaSessionContextId = Some(aBrowsingContextId);
StoreMediaSessionContextIdOnWindowContext();
LOG("context %" PRIu64 " becomes active session context",
*mActiveMediaSessionContextId);
mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
mSupportedActionsChangedEvent.Notify(GetSupportedActions());
mPositionStateChangedEvent.Notify(GetCurrentPositionState());
if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
obs->NotifyObservers(nullptr, "active-media-session-changed", nullptr);
}
}
}
void MediaStatusManager::ClearActiveMediaSessionContextIdIfNeeded() {
if (!mActiveMediaSessionContextId) {
return;
}
LOG("Clear active session context");
mActiveMediaSessionContextId.reset();
StoreMediaSessionContextIdOnWindowContext();
mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
mSupportedActionsChangedEvent.Notify(GetSupportedActions());
mPositionStateChangedEvent.Notify(GetCurrentPositionState());
if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
obs->NotifyObservers(nullptr, "active-media-session-changed", nullptr);
}
}
}
void MediaStatusManager::StoreMediaSessionContextIdOnWindowContext() {
RefPtr<CanonicalBrowsingContext> bc =
CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
if (bc && bc->GetTopWindowContext()) {
Unused << bc->GetTopWindowContext()->SetActiveMediaSessionContextId(
mActiveMediaSessionContextId);
}
}
bool MediaStatusManager::IsSessionOwningAudioFocus(
uint64_t aBrowsingContextId) const {
Maybe<uint64_t> audioFocusContextId =
mPlaybackStatusDelegate.GetAudioFocusOwnerContextId();
return audioFocusContextId ? *audioFocusContextId == aBrowsingContextId
: false;
}
MediaMetadataBase MediaStatusManager::CreateDefaultMetadata() const {
MediaMetadataBase metadata;
metadata.mTitle = GetDefaultTitle();
metadata.mArtwork.AppendElement()->mSrc = GetDefaultFaviconURL();
LOG("Default media metadata, title=%s, album src=%s",
NS_ConvertUTF16toUTF8(metadata.mTitle).get(),
NS_ConvertUTF16toUTF8(metadata.mArtwork[0].mSrc).get());
return metadata;
}
nsString MediaStatusManager::GetDefaultTitle() const {
RefPtr<MediaControlService> service = MediaControlService::GetService();
nsString defaultTitle = service->GetFallbackTitle();
RefPtr<CanonicalBrowsingContext> bc =
CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
if (!bc) {
return defaultTitle;
}
RefPtr<WindowGlobalParent> globalParent = bc->GetCurrentWindowGlobal();
if (!globalParent) {
return defaultTitle;
}
// The media metadata would be shown on the virtual controller interface. For
// example, on Android, the interface would be shown on both notification bar
// and lockscreen. Therefore, what information we provide via metadata is
// quite important, because if we're in private browsing, we don't want to
// expose details about what website the user is browsing on the lockscreen.
// Therefore, using the default title when in the private browsing or the
// document title is empty. Otherwise, use the document title.
nsString documentTitle;
if (!IsInPrivateBrowsing()) {
globalParent->GetDocumentTitle(documentTitle);
}
return documentTitle.IsEmpty() ? defaultTitle : documentTitle;
}
nsString MediaStatusManager::GetDefaultFaviconURL() const {
#ifdef MOZ_PLACES
nsCOMPtr<nsIURI> faviconURI;
nsresult rv = NS_NewURI(getter_AddRefs(faviconURI),
nsLiteralCString(FAVICON_DEFAULT_URL));
NS_ENSURE_SUCCESS(rv, u""_ns);
// let OS related frameworks, such as SMTC and MPRIS, handle this URL in order
// to show the icon on virtual controller interface.
nsCOMPtr<nsIChromeRegistry> regService = services::GetChromeRegistry();
if (!regService) {
return u""_ns;
}
nsCOMPtr<nsIURI> processedURI;
regService->ConvertChromeURL(faviconURI, getter_AddRefs(processedURI));
nsAutoCString spec;
if (NS_FAILED(processedURI->GetSpec(spec))) {
return u""_ns;
}
return NS_ConvertUTF8toUTF16(spec);
#else
return u""_ns;
#endif
}
void MediaStatusManager::SetDeclaredPlaybackState(
uint64_t aBrowsingContextId, MediaSessionPlaybackState aState) {
auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
if (!info) {
return;
}
LOG("SetDeclaredPlaybackState from %s to %s",
ToMediaSessionPlaybackStateStr(info->mDeclaredPlaybackState),
ToMediaSessionPlaybackStateStr(aState));
info->mDeclaredPlaybackState = aState;
UpdateActualPlaybackState();
}
MediaSessionPlaybackState MediaStatusManager::GetCurrentDeclaredPlaybackState()
const {
if (!mActiveMediaSessionContextId) {
return MediaSessionPlaybackState::None;
}
return mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId)
.mDeclaredPlaybackState;
}
void MediaStatusManager::NotifyMediaPlaybackChanged(uint64_t aBrowsingContextId,
MediaPlaybackState aState) {
LOG("UpdateMediaPlaybackState %s for context %" PRIu64,
ToMediaPlaybackStateStr(aState), aBrowsingContextId);
const bool oldPlaying = mPlaybackStatusDelegate.IsPlaying();
mPlaybackStatusDelegate.UpdateMediaPlaybackState(aBrowsingContextId, aState);
// Playback state doesn't change, we don't need to update the guessed playback
// state. This is used to prevent the state from changing from `none` to
// `paused` when receiving `MediaPlaybackState::eStarted`.
if (mPlaybackStatusDelegate.IsPlaying() == oldPlaying) {
return;
}
if (mPlaybackStatusDelegate.IsPlaying()) {
SetGuessedPlayState(MediaSessionPlaybackState::Playing);
} else {
SetGuessedPlayState(MediaSessionPlaybackState::Paused);
}
}
void MediaStatusManager::SetGuessedPlayState(MediaSessionPlaybackState aState) {
if (aState == mGuessedPlaybackState) {
return;
}
LOG("SetGuessedPlayState : '%s'", ToMediaSessionPlaybackStateStr(aState));
mGuessedPlaybackState = aState;
UpdateActualPlaybackState();
}
void MediaStatusManager::UpdateActualPlaybackState() {
// The way to compute the actual playback state is based on the spec.
MediaSessionPlaybackState newState =
GetCurrentDeclaredPlaybackState() == MediaSessionPlaybackState::Playing
? MediaSessionPlaybackState::Playing
: mGuessedPlaybackState;
if (mActualPlaybackState == newState) {
return;
}
mActualPlaybackState = newState;
LOG("UpdateActualPlaybackState : '%s'",
ToMediaSessionPlaybackStateStr(mActualPlaybackState));
mPlaybackStateChangedEvent.Notify(mActualPlaybackState);
}
void MediaStatusManager::EnableAction(uint64_t aBrowsingContextId,
MediaSessionAction aAction) {
auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
if (!info) {
return;
}
if (info->IsActionSupported(aAction)) {
LOG("Action '%s' has already been enabled for context %" PRIu64,
GetEnumString(aAction).get(), aBrowsingContextId);
return;
}
LOG("Enable action %s for context %" PRIu64, GetEnumString(aAction).get(),
aBrowsingContextId);
info->EnableAction(aAction);
NotifySupportedKeysChangedIfNeeded(aBrowsingContextId);
}
void MediaStatusManager::DisableAction(uint64_t aBrowsingContextId,
MediaSessionAction aAction) {
auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
if (!info) {
return;
}
if (!info->IsActionSupported(aAction)) {
LOG("Action '%s' hasn't been enabled yet for context %" PRIu64,
GetEnumString(aAction).get(), aBrowsingContextId);
return;
}
LOG("Disable action %s for context %" PRIu64, GetEnumString(aAction).get(),
aBrowsingContextId);
info->DisableAction(aAction);
NotifySupportedKeysChangedIfNeeded(aBrowsingContextId);
}
void MediaStatusManager::UpdatePositionState(
uint64_t aBrowsingContextId, const Maybe<PositionState>& aState) {
auto info = mMediaSessionInfoMap.Lookup(aBrowsingContextId);
if (info) {
LOG("Update position state for context %" PRIu64, aBrowsingContextId);
info->mPositionState = aState;
}
// The position state comes from non-active media session which we don't care.
if (!mActiveMediaSessionContextId ||
*mActiveMediaSessionContextId != aBrowsingContextId) {
return;
}
mPositionStateChangedEvent.Notify(aState);
}
void MediaStatusManager::NotifySupportedKeysChangedIfNeeded(
uint64_t aBrowsingContextId) {
// Only the active media session's supported actions would be shown in virtual
// control interface, so we only notify the event when supported actions
// change happens on the active media session.
if (!mActiveMediaSessionContextId ||
*mActiveMediaSessionContextId != aBrowsingContextId) {
return;
}
mSupportedActionsChangedEvent.Notify(GetSupportedActions());
}
CopyableTArray<MediaSessionAction> MediaStatusManager::GetSupportedActions()
const {
CopyableTArray<MediaSessionAction> supportedActions;
if (!mActiveMediaSessionContextId) {
return supportedActions;
}
MediaSessionInfo info =
mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId);
for (MediaSessionAction action :
MakeWebIDLEnumeratedRange<MediaSessionAction>()) {
if (info.IsActionSupported(action)) {
supportedActions.AppendElement(action);
}
}
return supportedActions;
}
MediaMetadataBase MediaStatusManager::GetCurrentMediaMetadata() const {
// If we don't have active media session, active media session doesn't have
// media metadata, or we're in private browsing mode, then we should create a
// default metadata which is using website's title and favicon as title and
// artwork.
if (mActiveMediaSessionContextId && !IsInPrivateBrowsing()) {
MediaSessionInfo info =
mMediaSessionInfoMap.Get(*mActiveMediaSessionContextId);
if (!info.mMetadata) {
return CreateDefaultMetadata();
}
MediaMetadataBase& metadata = *(info.mMetadata);
FillMissingTitleAndArtworkIfNeeded(metadata);
return metadata;
}
return CreateDefaultMetadata();
}
Maybe<PositionState> MediaStatusManager::GetCurrentPositionState() const {
if (mActiveMediaSessionContextId) {
auto info = mMediaSessionInfoMap.Lookup(*mActiveMediaSessionContextId);
if (info) {
return info->mPositionState;
}
}
return Nothing();
}
void MediaStatusManager::FillMissingTitleAndArtworkIfNeeded(
MediaMetadataBase& aMetadata) const {
// If the metadata doesn't set its title and artwork properly, we would like
// to use default title and favicon instead in order to prevent showing
// nothing on the virtual control interface.
if (aMetadata.mTitle.IsEmpty()) {
aMetadata.mTitle = GetDefaultTitle();
}
if (aMetadata.mArtwork.IsEmpty()) {
aMetadata.mArtwork.AppendElement()->mSrc = GetDefaultFaviconURL();
}
}
bool MediaStatusManager::IsInPrivateBrowsing() const {
RefPtr<CanonicalBrowsingContext> bc =
CanonicalBrowsingContext::Get(mTopLevelBrowsingContextId);
if (!bc) {
return false;
}
RefPtr<Element> element = bc->GetEmbedderElement();
if (!element) {
return false;
}
return nsContentUtils::IsInPrivateBrowsing(element->OwnerDoc());
}
MediaSessionPlaybackState MediaStatusManager::PlaybackState() const {
return mActualPlaybackState;
}
bool MediaStatusManager::IsMediaAudible() const {
return mPlaybackStatusDelegate.IsAudible();
}
bool MediaStatusManager::IsMediaPlaying() const {
return mActualPlaybackState == MediaSessionPlaybackState::Playing;
}
bool MediaStatusManager::IsAnyMediaBeingControlled() const {
return mPlaybackStatusDelegate.IsAnyMediaBeingControlled();
}
void MediaStatusManager::NotifyPageTitleChanged() {
// If active media session has set non-empty metadata, then we would use that
// instead of using default metadata.
if (mActiveMediaSessionContextId &&
mMediaSessionInfoMap.Lookup(*mActiveMediaSessionContextId)->mMetadata) {
return;
}
// In private browsing mode, we won't show page title on default metadata so
// we don't need to update that.
if (IsInPrivateBrowsing()) {
return;
}
LOG("page title changed, update default metadata");
mMetadataChangedEvent.Notify(GetCurrentMediaMetadata());
}
} // namespace mozilla::dom