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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.
*/
#ifndef MediaSession_h
#define MediaSession_h
#if ENABLE(MEDIA_SESSION)
#include "MediaRemoteControls.h"
#include "MediaSessionMetadata.h"
namespace WebCore {
class Dictionary;
class Document;
class HTMLMediaElement;
class MediaSession final : public RefCounted<MediaSession> {
public:
enum class State {
Idle,
Active,
Interrupted
};
enum class Kind {
Default,
Content,
Transient,
TransientSolo,
Ambient
};
static Ref<MediaSession> create(ScriptExecutionContext& context, const String& kind = String())
{
return adoptRef(*new MediaSession(context, kind));
}
~MediaSession();
String kind() const;
Kind kindEnum() const { return m_kind; }
MediaRemoteControls* controls();
WEBCORE_EXPORT State currentState() const { return m_currentState; }
bool hasActiveMediaElements() const;
void setMetadata(const Dictionary&);
void deactivate();
// Runs the media session invocation algorithm and returns true on success.
bool invoke();
void handleDuckInterruption();
void handleIndefinitePauseInterruption();
void handlePauseInterruption();
void handleUnduckInterruption();
void handleUnpauseInterruption();
void togglePlayback();
void skipToNextTrack();
void skipToPreviousTrack();
void controlIsEnabledDidChange();
private:
friend class HTMLMediaElement;
MediaSession(ScriptExecutionContext&, const String&);
static Kind parseKind(const String&);
void addMediaElement(HTMLMediaElement&);
void removeMediaElement(HTMLMediaElement&);
void safelyIterateActiveMediaElements(std::function<void(HTMLMediaElement*)>);
void changeActiveMediaElements(std::function<void(void)>);
void addActiveMediaElement(HTMLMediaElement&);
bool isMediaElementActive(HTMLMediaElement&);
void releaseInternal();
State m_currentState { State::Idle };
HashSet<HTMLMediaElement*> m_participatingElements;
HashSet<HTMLMediaElement*> m_activeParticipatingElements;
HashSet<HTMLMediaElement*>* m_iteratedActiveParticipatingElements { nullptr };
Document& m_document;
const Kind m_kind { Kind::Default };
RefPtr<MediaRemoteControls> m_controls;
MediaSessionMetadata m_metadata;
};
} // namespace WebCore
#endif /* ENABLE(MEDIA_SESSION) */
#endif /* MediaSession_h */
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