/* * Copyright (C) 2012-2017 Apple Inc. All rights reserved. * Copyright (C) 2013 Cable Television Labs, 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_TRACK) #include <wtf/MediaTime.h> #include <wtf/ThreadSafeRefCounted.h> #include <wtf/text/AtomicString.h> namespace WebCore { class TrackPrivateBaseClient { public: virtual ~TrackPrivateBaseClient() { } virtual void idChanged(const AtomicString&) = 0; virtual void labelChanged(const AtomicString&) = 0; virtual void languageChanged(const AtomicString&) = 0; virtual void willRemove() = 0; }; class TrackPrivateBase : public ThreadSafeRefCounted<TrackPrivateBase> { WTF_MAKE_NONCOPYABLE(TrackPrivateBase); WTF_MAKE_FAST_ALLOCATED; public: virtual ~TrackPrivateBase() = default; virtual TrackPrivateBaseClient* client() const = 0; virtual AtomicString id() const { return emptyAtom(); } virtual AtomicString label() const { return emptyAtom(); } virtual AtomicString language() const { return emptyAtom(); } virtual int trackIndex() const { return 0; } virtual MediaTime startTimeVariance() const { return MediaTime::zeroTime(); } void willBeRemoved() { if (auto* client = this->client()) client->willRemove(); } protected: TrackPrivateBase() = default; }; } // namespace WebCore #endif