| /* |
| * 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" |
| #include <wtf/NeverDestroyed.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) */ |
