1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright (C) 2013 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_MEDIA_SOURCE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_MEDIA_SOURCE_H_
#include <memory>
#include "third_party/blink/public/platform/web_media_source.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/execution_context/context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/fileapi/url_registry.h"
#include "third_party/blink/renderer/core/html/media/html_media_source.h"
#include "third_party/blink/renderer/core/html/time_ranges.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/modules/mediasource/source_buffer.h"
#include "third_party/blink/renderer/modules/mediasource/source_buffer_list.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
namespace blink {
class EventQueue;
class ExceptionState;
class WebSourceBuffer;
class MediaSource final : public EventTargetWithInlineData,
public HTMLMediaSource,
public ActiveScriptWrappable<MediaSource>,
public ContextLifecycleObserver {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(MediaSource);
public:
static const AtomicString& OpenKeyword();
static const AtomicString& ClosedKeyword();
static const AtomicString& EndedKeyword();
static MediaSource* Create(ExecutionContext*);
explicit MediaSource(ExecutionContext*);
~MediaSource() override;
static void LogAndThrowDOMException(ExceptionState&,
DOMExceptionCode error,
const String& message);
static void LogAndThrowTypeError(ExceptionState&, const String&);
// MediaSource.idl methods
SourceBufferList* sourceBuffers() { return source_buffers_.Get(); }
SourceBufferList* activeSourceBuffers() {
return active_source_buffers_.Get();
}
SourceBuffer* addSourceBuffer(const String& type, ExceptionState&);
void removeSourceBuffer(SourceBuffer*, ExceptionState&);
void setDuration(double, ExceptionState&);
DEFINE_ATTRIBUTE_EVENT_LISTENER(sourceopen, kSourceopen)
DEFINE_ATTRIBUTE_EVENT_LISTENER(sourceended, kSourceended)
DEFINE_ATTRIBUTE_EVENT_LISTENER(sourceclose, kSourceclose)
const AtomicString& readyState() const { return ready_state_; }
void endOfStream(const AtomicString& error, ExceptionState&);
void endOfStream(ExceptionState&);
void setLiveSeekableRange(double start, double end, ExceptionState&);
void clearLiveSeekableRange(ExceptionState&);
static bool isTypeSupported(const String& type);
// HTMLMediaSource
bool AttachToElement(HTMLMediaElement*) override;
void SetWebMediaSourceAndOpen(std::unique_ptr<WebMediaSource>) override;
void Close() override;
bool IsClosed() const override;
double duration() const override;
WebTimeRanges BufferedInternal() const override;
WebTimeRanges SeekableInternal() const override;
TimeRanges* Buffered() const override;
void OnTrackChanged(TrackBase*) override;
// EventTarget interface
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
// ScriptWrappable
bool HasPendingActivity() const final;
// ContextLifecycleObserver interface
void ContextDestroyed(ExecutionContext*) override;
// URLRegistrable interface
URLRegistry& Registry() const override;
// Used by SourceBuffer.
void OpenIfInEndedState();
bool IsOpen() const;
void SetSourceBufferActive(SourceBuffer*, bool);
HTMLMediaElement* MediaElement() const;
void EndOfStreamAlgorithm(const WebMediaSource::EndOfStreamStatus);
// Used by MediaSourceRegistry.
void AddedToRegistry();
void RemovedFromRegistry();
void Trace(blink::Visitor*) override;
private:
void SetReadyState(const AtomicString&);
void OnReadyStateChange(const AtomicString&, const AtomicString&);
bool IsUpdating() const;
std::unique_ptr<WebSourceBuffer> CreateWebSourceBuffer(const String& type,
const String& codecs,
ExceptionState&);
void ScheduleEvent(const AtomicString& event_name);
// Implements the duration change algorithm.
// http://w3c.github.io/media-source/#duration-change-algorithm
void DurationChangeAlgorithm(double new_duration, ExceptionState&);
std::unique_ptr<WebMediaSource> web_media_source_;
AtomicString ready_state_;
Member<EventQueue> async_event_queue_;
// Here, using Member, instead of Member, to keep
// |attached_element_|, |source_buffers_|, |active_source_buffers_|, and their
// wrappers from being collected if we are alive or traceable from a GC root.
// Activity by this MediaSource or on references to objects returned by
// exercising this MediaSource (such as an app manipulating a SourceBuffer
// retrieved via activeSourceBuffers()) may cause events to be dispatched by
// these other objects.
Member<HTMLMediaElement> attached_element_;
Member<SourceBufferList> source_buffers_;
Member<SourceBufferList> active_source_buffers_;
Member<TimeRanges> live_seekable_range_;
int added_to_registry_counter_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_MEDIA_SOURCE_H_
|
