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#include "config.h"
32#include "SourceBufferList.h"
33
34#if ENABLE(MEDIA_SOURCE)
35
36#include "Event.h"
37#include "EventNames.h"
38#include "SourceBuffer.h"
39#include <wtf/IsoMallocInlines.h>
40
41namespace WebCore {
42
43WTF_MAKE_ISO_ALLOCATED_IMPL(SourceBufferList);
44
45SourceBufferList::SourceBufferList(ScriptExecutionContext* context)
46 : ActiveDOMObject(context)
47 , m_asyncEventQueue(*this)
48{
49 suspendIfNeeded();
50}
51
52SourceBufferList::~SourceBufferList()
53{
54 ASSERT(m_list.isEmpty());
55}
56
57void SourceBufferList::add(Ref<SourceBuffer>&& buffer)
58{
59 m_list.append(WTFMove(buffer));
60 scheduleEvent(eventNames().addsourcebufferEvent);
61}
62
63void SourceBufferList::remove(SourceBuffer& buffer)
64{
65 size_t index = m_list.find(&buffer);
66 if (index == notFound)
67 return;
68 m_list.remove(index);
69 scheduleEvent(eventNames().removesourcebufferEvent);
70}
71
72void SourceBufferList::clear()
73{
74 m_list.clear();
75 scheduleEvent(eventNames().removesourcebufferEvent);
76}
77
78void SourceBufferList::swap(Vector<RefPtr<SourceBuffer>>& other)
79{
80 int changeInSize = other.size() - m_list.size();
81 int addedEntries = 0;
82 for (auto& sourceBuffer : other) {
83 if (!m_list.contains(sourceBuffer))
84 ++addedEntries;
85 }
86 int removedEntries = addedEntries - changeInSize;
87
88 m_list.swap(other);
89
90 if (addedEntries)
91 scheduleEvent(eventNames().addsourcebufferEvent);
92 if (removedEntries)
93 scheduleEvent(eventNames().removesourcebufferEvent);
94}
95
96void SourceBufferList::scheduleEvent(const AtomicString& eventName)
97{
98 auto event = Event::create(eventName, Event::CanBubble::No, Event::IsCancelable::No);
99 event->setTarget(this);
100
101 m_asyncEventQueue.enqueueEvent(WTFMove(event));
102}
103
104bool SourceBufferList::canSuspendForDocumentSuspension() const
105{
106 return !m_asyncEventQueue.hasPendingEvents();
107}
108
109void SourceBufferList::suspend(ReasonForSuspension reason)
110{
111 switch (reason) {
112 case ReasonForSuspension::PageCache:
113 case ReasonForSuspension::PageWillBeSuspended:
114 m_asyncEventQueue.suspend();
115 break;
116 case ReasonForSuspension::JavaScriptDebuggerPaused:
117 case ReasonForSuspension::WillDeferLoading:
118 // Do nothing, we don't pause media playback in these cases.
119 break;
120 }
121}
122
123void SourceBufferList::resume()
124{
125 m_asyncEventQueue.resume();
126}
127
128void SourceBufferList::stop()
129{
130 m_asyncEventQueue.close();
131}
132
133const char* SourceBufferList::activeDOMObjectName() const
134{
135 return "SourceBufferList";
136}
137
138} // namespace WebCore
139
140#endif
141