1/*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef MediaSourceBase_h
32#define MediaSourceBase_h
33
34#include "core/dom/ActiveDOMObject.h"
35#include "core/dom/EventTarget.h"
36#include "core/html/HTMLMediaSource.h"
37#include "core/html/URLRegistry.h"
38#include "core/platform/graphics/MediaSourcePrivate.h"
39#include "wtf/PassOwnPtr.h"
40#include "wtf/RefCounted.h"
41#include "wtf/Vector.h"
42
43namespace WebCore {
44
45class ExceptionState;
46class GenericEventQueue;
47
48class MediaSourceBase : public RefCounted<MediaSourceBase>, public HTMLMediaSource, public ActiveDOMObject, public EventTarget {
49public:
50    static const AtomicString& openKeyword();
51    static const AtomicString& closedKeyword();
52    static const AtomicString& endedKeyword();
53
54    virtual ~MediaSourceBase();
55
56    void addedToRegistry();
57    void removedFromRegistry();
58    void openIfInEndedState();
59    bool isOpen() const;
60
61    // HTMLMediaSource
62    virtual bool attachToElement(HTMLMediaElement*) OVERRIDE;
63    virtual void setPrivateAndOpen(PassOwnPtr<MediaSourcePrivate>) OVERRIDE;
64    virtual void close() OVERRIDE;
65    virtual bool isClosed() const OVERRIDE;
66    virtual double duration() const OVERRIDE;
67    virtual PassRefPtr<TimeRanges> buffered() const OVERRIDE;
68    virtual void refHTMLMediaSource() OVERRIDE { ref(); }
69    virtual void derefHTMLMediaSource() OVERRIDE { deref(); }
70
71    void setDuration(double, ExceptionState&);
72    const AtomicString& readyState() const { return m_readyState; }
73    void setReadyState(const AtomicString&);
74    void endOfStream(const AtomicString& error, ExceptionState&);
75
76
77    // ActiveDOMObject interface
78    virtual bool hasPendingActivity() const OVERRIDE;
79    virtual void stop() OVERRIDE;
80
81    // EventTarget interface
82    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
83    virtual EventTargetData* eventTargetData() OVERRIDE;
84    virtual EventTargetData* ensureEventTargetData() OVERRIDE;
85    virtual void refEventTarget() OVERRIDE { ref(); }
86    virtual void derefEventTarget() OVERRIDE { deref(); }
87
88    // URLRegistrable interface
89    virtual URLRegistry& registry() const OVERRIDE;
90
91    using RefCounted<MediaSourceBase>::ref;
92    using RefCounted<MediaSourceBase>::deref;
93
94protected:
95    explicit MediaSourceBase(ScriptExecutionContext*);
96
97    virtual void onReadyStateChange(const AtomicString& oldState, const AtomicString& newState) = 0;
98    virtual Vector<RefPtr<TimeRanges> > activeRanges() const = 0;
99
100    PassOwnPtr<SourceBufferPrivate> createSourceBufferPrivate(const String& type, const MediaSourcePrivate::CodecsArray&, ExceptionState&);
101    void scheduleEvent(const AtomicString& eventName);
102    GenericEventQueue* asyncEventQueue() const { return m_asyncEventQueue.get(); }
103
104private:
105    OwnPtr<MediaSourcePrivate> m_private;
106    EventTargetData m_eventTargetData;
107    AtomicString m_readyState;
108    OwnPtr<GenericEventQueue> m_asyncEventQueue;
109    HTMLMediaElement* m_attachedElement;
110};
111
112}
113
114#endif
115