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/*
* Copyright (C) 2015 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. ``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
* 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 "MediaSessionManager.h"
#if ENABLE(MEDIA_SESSION)
#include "MediaSession.h"
#include "MediaSessionInterruptionProviderMac.h"
namespace WebCore {
static const char* contentSessionKind = "content";
MediaSessionManager& MediaSessionManager::singleton()
{
static NeverDestroyed<MediaSessionManager> manager;
return manager;
}
MediaSessionManager::MediaSessionManager()
{
#if PLATFORM(MAC)
m_interruptionProvider = adoptRef(new MediaSessionInterruptionProviderMac(*this));
m_interruptionProvider->beginListeningForInterruptions();
#endif
}
bool MediaSessionManager::hasActiveMediaElements() const
{
for (auto* session : m_sessions) {
if (session->hasActiveMediaElements())
return true;
}
return false;
}
void MediaSessionManager::addMediaSession(MediaSession& session)
{
m_sessions.add(&session);
}
void MediaSessionManager::removeMediaSession(MediaSession& session)
{
m_sessions.remove(&session);
}
void MediaSessionManager::togglePlayback()
{
for (auto* session : m_sessions) {
String sessionKind = session->kind();
if (session->currentState() == MediaSession::State::Active && (sessionKind == contentSessionKind || sessionKind == ""))
session->togglePlayback();
}
}
void MediaSessionManager::skipToNextTrack()
{
// 5.2.2 When the user presses the MediaTrackNext media key, then for each Content-based media session that is
// currently ACTIVE and has a media remote controller with its nextTrackEnabled attribute set to true, queue a task
// to fire a simple event named nexttrack at its media remote controller.
for (auto* session : m_sessions) {
if (session->currentState() == MediaSession::State::Active && session->kind() == contentSessionKind)
session->skipToNextTrack();
}
}
void MediaSessionManager::skipToPreviousTrack()
{
// 5.2.2 When the user presses the MediaTrackPrevious media key, then for each Content-based media session that is
// currently ACTIVE and has a media remote controller with its previousTrackEnabled attribute set to true, queue a task
// to fire a simple event named previoustrack at its media remote controller.
for (auto* session : m_sessions) {
if (session->currentState() == MediaSession::State::Active && session->kind() == contentSessionKind)
session->skipToPreviousTrack();
}
}
void MediaSessionManager::didReceiveStartOfInterruptionNotification(MediaSessionInterruptingCategory interruptingCategory)
{
// 4.5.2 Interrupting a media session
// When a start-of-interruption notification event is received from the platform, then the user agent must run the
// media session interruption algorithm against all known media sessions, passing in each media session as media session.
for (auto* session : m_sessions) {
// 1. If media session's current state is not active, then terminate these steps.
if (session->currentState() != MediaSession::State::Active)
continue;
// 2. Let interrupting media session category be the media session category that triggered this interruption.
// If this interruption has no known media session category, let interrupting media session category be Default.
// 3. Run these substeps:
if (interruptingCategory == MediaSessionInterruptingCategory::Content) {
// - If interrupting media session category is Content:
// If media session's current media session type is Default or Content then indefinitely pause all of media
// session's active audio-producing participants and set media session's current state to idle.
if (session->kind() == MediaSessionKind::Default || session->kind() == MediaSessionKind::Content)
session->handleIndefinitePauseInterruption();
} else if (interruptingCategory == MediaSessionInterruptingCategory::Transient) {
// - If interrupting media session category is Transient:
// If media session's current media session type is Default or Content then duck all of media session's active
// audio-producing participants and set media session's current state to interrupted.
if (session->kind() == MediaSessionKind::Default || session->kind() == MediaSessionKind::Content)
session->handleDuckInterruption();
} else if (interruptingCategory == MediaSessionInterruptingCategory::TransientSolo) {
// - If interrupting media session category is Transient Solo:
// If media session's current media session type is Default, Content, Transient or Transient Solo then pause
// all of media session's active audio-producing participants and set current media session's current state to interrupted.
if (session->kind() != MediaSessionKind::Ambient)
session->handlePauseInterruption();
}
}
}
void MediaSessionManager::didReceiveEndOfInterruptionNotification(MediaSessionInterruptingCategory interruptingCategory)
{
// 4.5.2 Interrupting a media session
// When an end-of-interruption notification event is received from the platform, then the user agent must run the
// media session continuation algorithm against all known media sessions, passing in each media session as media session.
for (auto* session : m_sessions) {
// 1. If media session's current state is not interrupted, then terminate these steps.
if (session->currentState() != MediaSession::State::Interrupted)
continue;
// 2. Let interrupting media session category be the media session category that initially triggered this interruption.
// If this interruption has no known media session category, let interrupting media session category be Default.
// 3. Run these substeps:
if (interruptingCategory == MediaSessionInterruptingCategory::Transient) {
// - If interrupting media session category is Transient:
// If media session's current media session type is Default or Content, then unduck all of media session's
// active audio-producing participants and set media session's current state to active.
if (session->kind() == MediaSessionKind::Default || session->kind() == MediaSessionKind::Content)
session->handleUnduckInterruption();
} else if (interruptingCategory == MediaSessionInterruptingCategory::TransientSolo) {
// - If interrupting media session category is Transient Solo:
// If media session's current media session type is Default, Content, Transient, or Transient Solo, then
// unpause the media session's active audio-producing participants and set media session's current state to active.
if (session->kind() != MediaSessionKind::Ambient)
session->handleUnpauseInterruption();
}
}
}
} // namespace WebCore
#endif /* ENABLE(MEDIA_SESSION) */
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