1/* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * Copyright (C) 2011, 2012, 2013 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#ifndef VideoTrack_h 28#define VideoTrack_h 29 30#if ENABLE(VIDEO_TRACK) 31 32#include "ExceptionCode.h" 33#include "TrackBase.h" 34#include "VideoTrackPrivate.h" 35#include <wtf/RefCounted.h> 36#include <wtf/text/WTFString.h> 37 38namespace WebCore { 39 40class MediaDescription; 41class VideoTrack; 42 43class VideoTrackClient { 44public: 45 virtual ~VideoTrackClient() { } 46 virtual void videoTrackSelectedChanged(VideoTrack*) = 0; 47}; 48 49class VideoTrack : public TrackBase, public VideoTrackPrivateClient { 50public: 51 static PassRefPtr<VideoTrack> create(VideoTrackClient* client, PassRefPtr<VideoTrackPrivate> trackPrivate) 52 { 53 return adoptRef(new VideoTrack(client, trackPrivate)); 54 } 55 virtual ~VideoTrack(); 56 57 static const AtomicString& alternativeKeyword(); 58 static const AtomicString& captionsKeyword(); 59 static const AtomicString& mainKeyword(); 60 static const AtomicString& signKeyword(); 61 static const AtomicString& subtitlesKeyword(); 62 static const AtomicString& commentaryKeyword(); 63 virtual const AtomicString& defaultKindKeyword() const override { return emptyAtom; } 64 65 bool selected() const { return m_selected; } 66 virtual void setSelected(const bool); 67 68 virtual void clearClient() override { m_client = 0; } 69 VideoTrackClient* client() const { return m_client; } 70 71 size_t inbandTrackIndex(); 72 73#if ENABLE(MEDIA_SOURCE) 74 virtual void setKind(const AtomicString&) override; 75 virtual void setLanguage(const AtomicString&) override; 76#endif 77 78 const MediaDescription& description() const; 79 80 void setPrivate(PassRefPtr<VideoTrackPrivate>); 81 82protected: 83 VideoTrack(VideoTrackClient*, PassRefPtr<VideoTrackPrivate> privateTrack); 84 85private: 86 virtual bool isValidKind(const AtomicString&) const override; 87 88 virtual void selectedChanged(VideoTrackPrivate*, bool) override; 89 virtual void idChanged(TrackPrivateBase*, const AtomicString&) override; 90 virtual void labelChanged(TrackPrivateBase*, const AtomicString&) override; 91 virtual void languageChanged(TrackPrivateBase*, const AtomicString&) override; 92 virtual void willRemove(TrackPrivateBase*) override; 93 94 virtual bool enabled() const override { return selected(); } 95 96 void updateKindFromPrivate(); 97 98 bool m_selected; 99 VideoTrackClient* m_client; 100 101 RefPtr<VideoTrackPrivate> m_private; 102}; 103 104inline VideoTrack* toVideoTrack(TrackBase* track) 105{ 106 ASSERT_WITH_SECURITY_IMPLICATION(track->type() == TrackBase::VideoTrack); 107 return static_cast<VideoTrack*>(track); 108} 109 110} // namespace WebCore 111 112#endif 113#endif 114