/* * 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) */