blob: cea5068aebfee71e7231c00571344cc1dc1e4387 [file] [log] [blame]
/*
* Copyright (C) 2013-2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "PlatformMediaSessionManager.h"
#include "AudioSession.h"
#include "Document.h"
#include "Logging.h"
#include "PlatformMediaSession.h"
namespace WebCore {
#if ENABLE(VIDEO) || ENABLE(WEB_AUDIO)
#if ENABLE(WEBM_FORMAT_READER)
bool PlatformMediaSessionManager::m_webMFormatReaderEnabled;
#endif
#if ENABLE(VORBIS)
bool PlatformMediaSessionManager::m_vorbisDecoderEnabled;
#endif
#if ENABLE(OPUS)
bool PlatformMediaSessionManager::m_opusDecoderEnabled;
#endif
#if ENABLE(ALTERNATE_WEBM_PLAYER)
bool PlatformMediaSessionManager::m_alternateWebMPlayerEnabled;
#endif
#if ENABLE(VP9)
bool PlatformMediaSessionManager::m_vp9DecoderEnabled;
bool PlatformMediaSessionManager::m_vp8DecoderEnabled;
bool PlatformMediaSessionManager::m_vp9SWDecoderEnabled;
#endif
static std::unique_ptr<PlatformMediaSessionManager>& sharedPlatformMediaSessionManager()
{
static NeverDestroyed<std::unique_ptr<PlatformMediaSessionManager>> platformMediaSessionManager;
return platformMediaSessionManager.get();
}
PlatformMediaSessionManager& PlatformMediaSessionManager::sharedManager()
{
auto& manager = sharedPlatformMediaSessionManager();
if (!manager) {
manager = PlatformMediaSessionManager::create();
manager->resetRestrictions();
}
return *manager;
}
PlatformMediaSessionManager* PlatformMediaSessionManager::sharedManagerIfExists()
{
return sharedPlatformMediaSessionManager().get();
}
#if !PLATFORM(COCOA) && (!USE(GLIB) || !ENABLE(MEDIA_SESSION))
std::unique_ptr<PlatformMediaSessionManager> PlatformMediaSessionManager::create()
{
return std::unique_ptr<PlatformMediaSessionManager>(new PlatformMediaSessionManager);
}
#endif // !PLATFORM(COCOA) && (!USE(GLIB) || !ENABLE(MEDIA_SESSION))
void PlatformMediaSessionManager::updateNowPlayingInfoIfNecessary()
{
if (auto existingManager = PlatformMediaSessionManager::sharedManagerIfExists())
existingManager->scheduleSessionStatusUpdate();
}
PlatformMediaSessionManager::PlatformMediaSessionManager()
#if !RELEASE_LOG_DISABLED
: m_logger(AggregateLogger::create(this))
#endif
{
}
static inline unsigned indexFromMediaType(PlatformMediaSession::MediaType type)
{
return static_cast<unsigned>(type);
}
void PlatformMediaSessionManager::resetRestrictions()
{
m_restrictions[indexFromMediaType(PlatformMediaSession::MediaType::Video)] = NoRestrictions;
m_restrictions[indexFromMediaType(PlatformMediaSession::MediaType::Audio)] = NoRestrictions;
m_restrictions[indexFromMediaType(PlatformMediaSession::MediaType::VideoAudio)] = NoRestrictions;
m_restrictions[indexFromMediaType(PlatformMediaSession::MediaType::WebAudio)] = NoRestrictions;
}
bool PlatformMediaSessionManager::has(PlatformMediaSession::MediaType type) const
{
return anyOfSessions([type] (auto& session) {
return session.mediaType() == type;
});
}
bool PlatformMediaSessionManager::activeAudioSessionRequired() const
{
if (anyOfSessions([] (auto& session) { return session.activeAudioSessionRequired(); }))
return true;
return WTF::anyOf(m_audioCaptureSources, [](auto& source) {
return source.isCapturingAudio();
});
}
bool PlatformMediaSessionManager::canProduceAudio() const
{
return anyOfSessions([] (auto& session) {
return session.canProduceAudio();
});
}
int PlatformMediaSessionManager::count(PlatformMediaSession::MediaType type) const
{
int count = 0;
for (const auto& session : m_sessions) {
if (session->mediaType() == type)
++count;
}
return count;
}
int PlatformMediaSessionManager::countActiveAudioCaptureSources()
{
int count = 0;
for (const auto& source : m_audioCaptureSources) {
if (source.isCapturingAudio())
++count;
}
return count;
}
void PlatformMediaSessionManager::beginInterruption(PlatformMediaSession::InterruptionType type)
{
ALWAYS_LOG(LOGIDENTIFIER);
m_currentInterruption = type;
forEachSession([type] (auto& session) {
session.beginInterruption(type);
});
scheduleUpdateSessionState();
}
void PlatformMediaSessionManager::endInterruption(PlatformMediaSession::EndInterruptionFlags flags)
{
ALWAYS_LOG(LOGIDENTIFIER);
m_currentInterruption = { };
forEachSession([flags] (auto& session) {
session.endInterruption(flags);
});
}
void PlatformMediaSessionManager::addSession(PlatformMediaSession& session)
{
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier());
m_sessions.append(session);
if (m_currentInterruption)
session.beginInterruption(*m_currentInterruption);
#if !RELEASE_LOG_DISABLED
m_logger->addLogger(session.logger());
#endif
scheduleUpdateSessionState();
}
bool PlatformMediaSessionManager::hasNoSession() const
{
return m_sessions.isEmpty() || std::all_of(m_sessions.begin(), m_sessions.end(), std::logical_not<void>());
}
void PlatformMediaSessionManager::removeSession(PlatformMediaSession& session)
{
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier());
size_t index = m_sessions.find(&session);
if (index == notFound)
return;
m_sessions.remove(index);
if (hasNoSession())
maybeDeactivateAudioSession();
#if !RELEASE_LOG_DISABLED
m_logger->removeLogger(session.logger());
#endif
scheduleUpdateSessionState();
}
void PlatformMediaSessionManager::addRestriction(PlatformMediaSession::MediaType type, SessionRestrictions restriction)
{
m_restrictions[indexFromMediaType(type)] |= restriction;
}
void PlatformMediaSessionManager::removeRestriction(PlatformMediaSession::MediaType type, SessionRestrictions restriction)
{
m_restrictions[indexFromMediaType(type)] &= ~restriction;
}
PlatformMediaSessionManager::SessionRestrictions PlatformMediaSessionManager::restrictions(PlatformMediaSession::MediaType type)
{
return m_restrictions[indexFromMediaType(type)];
}
bool PlatformMediaSessionManager::sessionWillBeginPlayback(PlatformMediaSession& session)
{
setCurrentSession(session);
auto sessionType = session.mediaType();
auto restrictions = this->restrictions(sessionType);
if (session.state() == PlatformMediaSession::Interrupted && restrictions & InterruptedPlaybackNotPermitted) {
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier(), " returning false because session.state() is Interrupted, and InterruptedPlaybackNotPermitted");
return false;
}
if (!maybeActivateAudioSession()) {
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier(), " returning false, failed to activate AudioSession");
return false;
}
if (m_currentInterruption)
endInterruption(PlatformMediaSession::NoFlags);
if (restrictions & ConcurrentPlaybackNotPermitted) {
forEachMatchingSession([&session](auto& oneSession) {
return &oneSession != &session
&& oneSession.state() == PlatformMediaSession::Playing
&& !oneSession.canPlayConcurrently(session);
}, [](auto& oneSession) {
oneSession.pauseSession();
});
}
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier(), " returning true");
return true;
}
void PlatformMediaSessionManager::sessionWillEndPlayback(PlatformMediaSession& session, DelayCallingUpdateNowPlaying)
{
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier());
if (m_sessions.size() < 2)
return;
size_t pausingSessionIndex = notFound;
size_t lastPlayingSessionIndex = notFound;
for (size_t i = 0, size = m_sessions.size(); i < size; ++i) {
const auto& oneSession = *m_sessions[i];
if (&oneSession == &session)
pausingSessionIndex = i;
else if (oneSession.state() == PlatformMediaSession::Playing)
lastPlayingSessionIndex = i;
else
break;
}
if (lastPlayingSessionIndex == notFound || pausingSessionIndex == notFound)
return;
if (pausingSessionIndex > lastPlayingSessionIndex)
return;
m_sessions.remove(pausingSessionIndex);
m_sessions.append(session);
ALWAYS_LOG(LOGIDENTIFIER, "session moved from index ", pausingSessionIndex, " to ", lastPlayingSessionIndex);
}
void PlatformMediaSessionManager::sessionStateChanged(PlatformMediaSession& session)
{
// Call updateSessionState() synchronously if the new state is Playing to ensure
// the audio session is active and has the correct category before playback starts.
if (session.state() == PlatformMediaSession::Playing)
updateSessionState();
else
scheduleUpdateSessionState();
}
void PlatformMediaSessionManager::setCurrentSession(PlatformMediaSession& session)
{
ALWAYS_LOG(LOGIDENTIFIER, session.logIdentifier());
if (m_sessions.size() < 2)
return;
size_t index = m_sessions.find(&session);
ASSERT(index != notFound);
if (!index || index == notFound)
return;
m_sessions.remove(index);
m_sessions.insert(0, session);
ALWAYS_LOG(LOGIDENTIFIER, "session moved from index ", index, " to 0");
}
PlatformMediaSession* PlatformMediaSessionManager::currentSession() const
{
if (!m_sessions.size())
return nullptr;
return m_sessions[0].get();
}
void PlatformMediaSessionManager::applicationWillBecomeInactive()
{
ALWAYS_LOG(LOGIDENTIFIER);
forEachMatchingSession([&](auto& session) {
return restrictions(session.mediaType()) & InactiveProcessPlaybackRestricted;
}, [](auto& session) {
session.beginInterruption(PlatformMediaSession::ProcessInactive);
});
}
void PlatformMediaSessionManager::applicationDidBecomeActive()
{
ALWAYS_LOG(LOGIDENTIFIER);
forEachMatchingSession([&](auto& session) {
return restrictions(session.mediaType()) & InactiveProcessPlaybackRestricted;
}, [](auto& session) {
session.endInterruption(PlatformMediaSession::MayResumePlaying);
});
}
void PlatformMediaSessionManager::applicationDidEnterBackground(bool suspendedUnderLock)
{
ALWAYS_LOG(LOGIDENTIFIER, "suspendedUnderLock: ", suspendedUnderLock);
if (m_isApplicationInBackground)
return;
m_isApplicationInBackground = true;
forEachSession([&] (auto& session) {
if (suspendedUnderLock && restrictions(session.mediaType()) & SuspendedUnderLockPlaybackRestricted)
session.beginInterruption(PlatformMediaSession::SuspendedUnderLock);
else if (restrictions(session.mediaType()) & BackgroundProcessPlaybackRestricted)
session.beginInterruption(PlatformMediaSession::EnteringBackground);
});
}
void PlatformMediaSessionManager::applicationWillEnterForeground(bool suspendedUnderLock)
{
ALWAYS_LOG(LOGIDENTIFIER, "suspendedUnderLock: ", suspendedUnderLock);
if (!m_isApplicationInBackground)
return;
m_isApplicationInBackground = false;
forEachMatchingSession([&](auto& session) {
return (suspendedUnderLock && restrictions(session.mediaType()) & SuspendedUnderLockPlaybackRestricted) || restrictions(session.mediaType()) & BackgroundProcessPlaybackRestricted;
}, [](auto& session) {
session.endInterruption(PlatformMediaSession::MayResumePlaying);
});
}
void PlatformMediaSessionManager::processWillSuspend()
{
if (m_processIsSuspended)
return;
m_processIsSuspended = true;
ALWAYS_LOG(LOGIDENTIFIER);
forEachSession([&] (auto& session) {
session.client().processIsSuspendedChanged();
});
maybeDeactivateAudioSession();
}
void PlatformMediaSessionManager::processDidResume()
{
if (!m_processIsSuspended)
return;
m_processIsSuspended = false;
forEachSession([&] (auto& session) {
session.client().processIsSuspendedChanged();
});
#if USE(AUDIO_SESSION)
if (!m_becameActive)
maybeActivateAudioSession();
#endif
}
void PlatformMediaSessionManager::setIsPlayingToAutomotiveHeadUnit(bool isPlayingToAutomotiveHeadUnit)
{
if (isPlayingToAutomotiveHeadUnit == m_isPlayingToAutomotiveHeadUnit)
return;
ALWAYS_LOG(LOGIDENTIFIER, isPlayingToAutomotiveHeadUnit);
m_isPlayingToAutomotiveHeadUnit = isPlayingToAutomotiveHeadUnit;
}
void PlatformMediaSessionManager::sessionIsPlayingToWirelessPlaybackTargetChanged(PlatformMediaSession& session)
{
if (!m_isApplicationInBackground || !(restrictions(session.mediaType()) & BackgroundProcessPlaybackRestricted))
return;
if (session.state() != PlatformMediaSession::Interrupted)
session.beginInterruption(PlatformMediaSession::EnteringBackground);
}
void PlatformMediaSessionManager::sessionCanProduceAudioChanged()
{
ALWAYS_LOG(LOGIDENTIFIER);
maybeActivateAudioSession();
updateSessionState();
}
void PlatformMediaSessionManager::processDidReceiveRemoteControlCommand(PlatformMediaSession::RemoteControlCommandType command, const PlatformMediaSession::RemoteCommandArgument& argument)
{
PlatformMediaSession* activeSession = currentSession();
if (!activeSession || !activeSession->canReceiveRemoteControlCommands())
return;
activeSession->didReceiveRemoteControlCommand(command, argument);
}
bool PlatformMediaSessionManager::computeSupportsSeeking() const
{
PlatformMediaSession* activeSession = currentSession();
if (!activeSession)
return false;
return activeSession->supportsSeeking();
}
void PlatformMediaSessionManager::processSystemWillSleep()
{
if (m_currentInterruption)
return;
forEachSession([] (auto& session) {
session.beginInterruption(PlatformMediaSession::SystemSleep);
});
}
void PlatformMediaSessionManager::processSystemDidWake()
{
if (m_currentInterruption)
return;
forEachSession([] (auto& session) {
session.endInterruption(PlatformMediaSession::MayResumePlaying);
});
}
void PlatformMediaSessionManager::pauseAllMediaPlaybackForGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
forEachSessionInGroup(mediaSessionGroupIdentifier, [](auto& session) {
session.pauseSession();
});
}
bool PlatformMediaSessionManager::mediaPlaybackIsPaused(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
bool mediaPlaybackIsPaused = false;
forEachSessionInGroup(mediaSessionGroupIdentifier, [&mediaPlaybackIsPaused](auto& session) {
if (session.state() == PlatformMediaSession::Paused)
mediaPlaybackIsPaused = true;
});
return mediaPlaybackIsPaused;
}
void PlatformMediaSessionManager::stopAllMediaPlaybackForProcess()
{
forEachSession([] (auto& session) {
session.stopSession();
});
}
void PlatformMediaSessionManager::suspendAllMediaPlaybackForGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
forEachSessionInGroup(mediaSessionGroupIdentifier, [](auto& session) {
session.beginInterruption(PlatformMediaSession::PlaybackSuspended);
});
}
void PlatformMediaSessionManager::resumeAllMediaPlaybackForGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
forEachSessionInGroup(mediaSessionGroupIdentifier, [](auto& session) {
session.endInterruption(PlatformMediaSession::MayResumePlaying);
});
}
void PlatformMediaSessionManager::suspendAllMediaBufferingForGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
forEachSessionInGroup(mediaSessionGroupIdentifier, [](auto& session) {
session.suspendBuffering();
});
}
void PlatformMediaSessionManager::resumeAllMediaBufferingForGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier)
{
forEachSessionInGroup(mediaSessionGroupIdentifier, [](auto& session) {
session.resumeBuffering();
});
}
Vector<WeakPtr<PlatformMediaSession>> PlatformMediaSessionManager::sessionsMatching(const Function<bool(const PlatformMediaSession&)>& filter) const
{
Vector<WeakPtr<PlatformMediaSession>> matchingSessions;
for (auto& session : m_sessions) {
if (filter(*session))
matchingSessions.append(session);
}
return matchingSessions;
}
void PlatformMediaSessionManager::forEachMatchingSession(const Function<bool(const PlatformMediaSession&)>& predicate, const Function<void(PlatformMediaSession&)>& callback)
{
for (auto& session : sessionsMatching(predicate)) {
ASSERT(session);
if (session)
callback(*session);
}
}
void PlatformMediaSessionManager::forEachSessionInGroup(MediaSessionGroupIdentifier mediaSessionGroupIdentifier, const Function<void(PlatformMediaSession&)>& callback)
{
if (!mediaSessionGroupIdentifier)
return;
forEachMatchingSession([mediaSessionGroupIdentifier](auto& session) {
return session.client().mediaSessionGroupIdentifier() == mediaSessionGroupIdentifier;
}, [&callback](auto& session) {
callback(session);
});
}
void PlatformMediaSessionManager::forEachSession(const Function<void(PlatformMediaSession&)>& callback)
{
auto sessions = m_sessions;
for (auto& session : sessions) {
ASSERT(session);
if (session)
callback(*session);
}
}
bool PlatformMediaSessionManager::anyOfSessions(const Function<bool(const PlatformMediaSession&)>& predicate) const
{
return WTF::anyOf(m_sessions, [&predicate](const auto& session) {
return predicate(*session);
});
}
void PlatformMediaSessionManager::addAudioCaptureSource(PlatformMediaSession::AudioCaptureSource& source)
{
ASSERT(!m_audioCaptureSources.contains(source));
m_audioCaptureSources.add(source);
updateSessionState();
}
void PlatformMediaSessionManager::removeAudioCaptureSource(PlatformMediaSession::AudioCaptureSource& source)
{
m_audioCaptureSources.remove(source);
scheduleUpdateSessionState();
}
void PlatformMediaSessionManager::scheduleUpdateSessionState()
{
if (m_hasScheduledSessionStateUpdate)
return;
m_hasScheduledSessionStateUpdate = true;
callOnMainThread([this] {
updateSessionState();
m_hasScheduledSessionStateUpdate = false;
});
}
void PlatformMediaSessionManager::maybeDeactivateAudioSession()
{
#if USE(AUDIO_SESSION)
if (!m_becameActive || !shouldDeactivateAudioSession())
return;
ALWAYS_LOG(LOGIDENTIFIER, "tried to set inactive AudioSession");
AudioSession::sharedSession().tryToSetActive(false);
m_becameActive = false;
#endif
}
bool PlatformMediaSessionManager::maybeActivateAudioSession()
{
#if USE(AUDIO_SESSION)
if (!activeAudioSessionRequired())
return true;
m_becameActive = AudioSession::sharedSession().tryToSetActive(true);
ALWAYS_LOG(LOGIDENTIFIER, m_becameActive ? "successfully activated" : "failed to activate", " AudioSession");
return m_becameActive;
#else
return true;
#endif
}
static bool& deactivateAudioSession()
{
static bool deactivate;
return deactivate;
}
bool PlatformMediaSessionManager::shouldDeactivateAudioSession()
{
return deactivateAudioSession();
}
void PlatformMediaSessionManager::setShouldDeactivateAudioSession(bool deactivate)
{
deactivateAudioSession() = deactivate;
}
bool PlatformMediaSessionManager::webMFormatReaderEnabled()
{
#if ENABLE(WEBM_FORMAT_READER)
return m_webMFormatReaderEnabled;
#else
return false;
#endif
}
void PlatformMediaSessionManager::setWebMFormatReaderEnabled(bool enabled)
{
#if ENABLE(WEBM_FORMAT_READER)
m_webMFormatReaderEnabled = enabled;
#else
UNUSED_PARAM(enabled);
#endif
}
bool PlatformMediaSessionManager::vorbisDecoderEnabled()
{
#if ENABLE(VORBIS)
return m_vorbisDecoderEnabled;
#else
return false;
#endif
}
void PlatformMediaSessionManager::setVorbisDecoderEnabled(bool enabled)
{
#if ENABLE(VORBIS)
m_vorbisDecoderEnabled = enabled;
#else
UNUSED_PARAM(enabled);
#endif
}
bool PlatformMediaSessionManager::opusDecoderEnabled()
{
#if ENABLE(OPUS)
return m_opusDecoderEnabled;
#else
return false;
#endif
}
void PlatformMediaSessionManager::setOpusDecoderEnabled(bool enabled)
{
#if ENABLE(OPUS)
m_opusDecoderEnabled = enabled;
#else
UNUSED_PARAM(enabled);
#endif
}
void PlatformMediaSessionManager::setAlternateWebMPlayerEnabled(bool enabled)
{
#if ENABLE(ALTERNATE_WEBM_PLAYER)
m_alternateWebMPlayerEnabled = enabled;
#else
UNUSED_PARAM(enabled);
#endif
}
bool PlatformMediaSessionManager::alternateWebMPlayerEnabled()
{
#if ENABLE(ALTERNATE_WEBM_PLAYER)
return m_alternateWebMPlayerEnabled;
#else
return false;
#endif
}
#if ENABLE(VP9)
void PlatformMediaSessionManager::setShouldEnableVP9Decoder(bool vp9DecoderEnabled)
{
m_vp9DecoderEnabled = vp9DecoderEnabled;
}
bool PlatformMediaSessionManager::shouldEnableVP9Decoder()
{
return m_vp9DecoderEnabled;
}
void PlatformMediaSessionManager::setShouldEnableVP8Decoder(bool vp8DecoderEnabled)
{
m_vp8DecoderEnabled = vp8DecoderEnabled;
}
bool PlatformMediaSessionManager::shouldEnableVP8Decoder()
{
return m_vp8DecoderEnabled;
}
void PlatformMediaSessionManager::setShouldEnableVP9SWDecoder(bool vp9SWDecoderEnabled)
{
m_vp9SWDecoderEnabled = vp9SWDecoderEnabled;
}
bool PlatformMediaSessionManager::shouldEnableVP9SWDecoder()
{
return m_vp9SWDecoderEnabled;
}
#endif // ENABLE(VP9)
#else // ENABLE(VIDEO) || ENABLE(WEB_AUDIO)
void PlatformMediaSessionManager::updateNowPlayingInfoIfNecessary()
{
}
#endif // ENABLE(VIDEO) || ENABLE(WEB_AUDIO)
#if !RELEASE_LOG_DISABLED
WTFLogChannel& PlatformMediaSessionManager::logChannel() const
{
return LogMedia;
}
#endif
} // namespace WebCore