1/*
2 * Copyright (C) 2011 Apple Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef TrackBase_h
27#define TrackBase_h
28
29#if ENABLE(VIDEO_TRACK)
30
31#include "EventTarget.h"
32#include <wtf/RefCounted.h>
33
34namespace WebCore {
35
36class Element;
37class HTMLMediaElement;
38class SourceBuffer;
39
40class TrackBase : public RefCounted<TrackBase> {
41public:
42    virtual ~TrackBase();
43
44    enum Type { BaseTrack, TextTrack, AudioTrack, VideoTrack };
45    Type type() const { return m_type; }
46
47    void setMediaElement(HTMLMediaElement* element) { m_mediaElement = element; }
48    HTMLMediaElement* mediaElement() { return m_mediaElement; }
49    virtual Element* element();
50
51    virtual AtomicString id() const { return m_id; }
52    virtual void setId(const AtomicString& id) { m_id = id; }
53
54    AtomicString kind() const { return m_kind; }
55    virtual void setKind(const AtomicString&);
56
57    AtomicString label() const { return m_label; }
58    void setLabel(const AtomicString& label) { m_label = label; }
59
60    AtomicString language() const { return m_language; }
61    virtual void setLanguage(const AtomicString& language) { m_language = language; }
62
63    virtual void clearClient() = 0;
64
65    virtual int uniqueId() const { return m_uniqueId; }
66
67#if ENABLE(MEDIA_SOURCE)
68    SourceBuffer* sourceBuffer() const { return m_sourceBuffer; }
69    void setSourceBuffer(SourceBuffer* buffer) { m_sourceBuffer = buffer; }
70#endif
71
72    virtual bool enabled() const = 0;
73
74protected:
75    TrackBase(Type, const AtomicString& id, const AtomicString& label, const AtomicString& language);
76
77    virtual bool isValidKind(const AtomicString&) const = 0;
78    virtual const AtomicString& defaultKindKeyword() const = 0;
79
80    void setKindInternal(const AtomicString&);
81
82    HTMLMediaElement* m_mediaElement;
83
84#if ENABLE(MEDIA_SOURCE)
85    SourceBuffer* m_sourceBuffer;
86#endif
87
88private:
89    Type m_type;
90    int m_uniqueId;
91    AtomicString m_id;
92    AtomicString m_kind;
93    AtomicString m_label;
94    AtomicString m_language;
95};
96
97} // namespace WebCore
98
99#endif
100#endif // TrackBase_h
101