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/*
* Copyright (C) 2011-2020 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.
*/
#pragma once
#if ENABLE(VIDEO)
#include "ContextDestructionObserver.h"
#include "WebCoreOpaqueRoot.h"
#include <wtf/LoggerHelper.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/AtomString.h>
namespace WebCore {
class SourceBuffer;
class TrackListBase;
class TrackPrivateBase;
class TrackPrivateBaseClient;
using TrackID = uint64_t;
class TrackBase
: public RefCounted<TrackBase>
, public ContextDestructionObserver
#if !RELEASE_LOG_DISABLED
, private LoggerHelper
#endif
{
WTF_MAKE_TZONE_ALLOCATED(TrackBase);
public:
virtual ~TrackBase();
virtual void didMoveToNewDocument(Document&);
enum Type { BaseTrack, TextTrack, AudioTrack, VideoTrack };
Type type() const { return m_type; }
virtual AtomString id() const { return m_id; }
TrackID trackId() const { return m_trackId; }
AtomString label() const { return m_label; }
AtomString validBCP47Language() const { return m_validBCP47Language; }
AtomString language() const { return m_language; }
virtual int uniqueId() const { return m_uniqueId; }
#if ENABLE(MEDIA_SOURCE)
SourceBuffer* sourceBuffer() const { return m_sourceBuffer; }
void setSourceBuffer(SourceBuffer* buffer) { m_sourceBuffer = buffer; }
#endif
void setTrackList(TrackListBase&);
void clearTrackList();
TrackListBase* trackList() const;
WebCoreOpaqueRoot opaqueRoot();
virtual bool enabled() const = 0;
#if !RELEASE_LOG_DISABLED
virtual void setLogger(const Logger&, uint64_t);
const Logger& logger() const final { ASSERT(m_logger); return *m_logger.get(); }
uint64_t logIdentifier() const final { return m_logIdentifier; }
WTFLogChannel& logChannel() const final;
#endif
protected:
TrackBase(ScriptExecutionContext*, Type, const std::optional<AtomString>& id, TrackID, const AtomString& label, const AtomString& language);
virtual void setId(TrackID id)
{
m_id = AtomString::number(id);
m_trackId = id;
}
virtual void setLabel(const AtomString& label) { m_label = label; }
virtual void setLanguage(const AtomString&);
#if ENABLE(MEDIA_SOURCE)
SourceBuffer* m_sourceBuffer { nullptr };
#endif
void addClientToTrackPrivateBase(TrackPrivateBaseClient&, TrackPrivateBase&);
void removeClientFromTrackPrivateBase(TrackPrivateBase&);
private:
Type m_type;
int m_uniqueId;
AtomString m_id;
TrackID m_trackId { 0 };
AtomString m_label;
AtomString m_language;
AtomString m_validBCP47Language;
#if !RELEASE_LOG_DISABLED
RefPtr<const Logger> m_logger;
uint64_t m_logIdentifier { 0 };
#endif
WeakPtr<TrackListBase, WeakPtrImplWithEventTargetData> m_trackList;
size_t m_clientRegistrationId;
};
class MediaTrackBase : public TrackBase {
WTF_MAKE_TZONE_ALLOCATED(MediaTrackBase);
public:
const AtomString& kind() const { return m_kind; }
virtual void setKind(const AtomString&);
protected:
MediaTrackBase(ScriptExecutionContext*, Type, const std::optional<AtomString>& id, TrackID, const AtomString& label, const AtomString& language);
void setKindInternal(const AtomString&);
private:
virtual bool isValidKind(const AtomString&) const = 0;
AtomString m_kind;
};
inline WebCoreOpaqueRoot root(TrackBase* track)
{
return track->opaqueRoot();
}
} // namespace WebCore
#endif
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