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
|
/*
* Copyright (C) 2013 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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_ENCRYPTEDMEDIA_MEDIA_KEY_SESSION_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ENCRYPTEDMEDIA_MEDIA_KEY_SESSION_H_
#include <memory>
#include "third_party/blink/public/platform/web_content_decryption_module_session.h"
#include "third_party/blink/public/platform/web_encrypted_media_types.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_property.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_piece.h"
#include "third_party/blink/renderer/modules/encryptedmedia/media_key_status_map.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/timer.h"
namespace media {
enum class EmeInitDataType;
}
namespace blink {
class DOMException;
class EventQueue;
class ExceptionState;
class MediaKeys;
// References are held by JS only. However, even if all JS references are
// dropped, it won't be garbage collected until close event received or
// MediaKeys goes away (as determined by a WeakMember reference). This allows
// the CDM to continue to fire events for this session, as long as the session
// is open.
//
// WeakMember<MediaKeys> is used instead of having MediaKeys and MediaKeySession
// keep references to each other, and then having to inform the other object
// when it gets destroyed. When the Oilpan garbage collector determines that
// only WeakMember<> references remain to the MediaKeys object, the MediaKeys
// object will be finalized and the WeakMember<> references will be cleared
// out(zeroed) by the garbage collector.
//
// Because this object controls the lifetime of the
// WebContentDecryptionModuleSession, it may outlive any JavaScript references
// as long as the MediaKeys object is alive.
// The WebContentDecryptionModuleSession has the same lifetime as this object.
class MediaKeySession final
: public EventTargetWithInlineData,
public ActiveScriptWrappable<MediaKeySession>,
public ExecutionContextLifecycleObserver,
private WebContentDecryptionModuleSession::Client {
DEFINE_WRAPPERTYPEINFO();
USING_PRE_FINALIZER(MediaKeySession, Dispose);
public:
MediaKeySession(ScriptState*, MediaKeys*, WebEncryptedMediaSessionType);
~MediaKeySession() override;
String sessionId() const;
double expiration() const { return expiration_; }
ScriptPromise closed(ScriptState*);
MediaKeyStatusMap* keyStatuses();
DEFINE_ATTRIBUTE_EVENT_LISTENER(keystatuseschange, kKeystatuseschange)
DEFINE_ATTRIBUTE_EVENT_LISTENER(message, kMessage)
ScriptPromise generateRequest(ScriptState*,
const String& init_data_type,
const DOMArrayPiece& init_data,
ExceptionState&);
ScriptPromise load(ScriptState*, const String& session_id, ExceptionState&);
ScriptPromise update(ScriptState*,
const DOMArrayPiece& response,
ExceptionState&);
ScriptPromise close(ScriptState*, ExceptionState&);
ScriptPromise remove(ScriptState*, ExceptionState&);
// EventTarget
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
// ScriptWrappable
bool HasPendingActivity() const final;
// ExecutionContextLifecycleObserver
void ContextDestroyed() override;
void Trace(Visitor*) const override;
private:
class PendingAction;
friend class NewSessionResultPromise;
friend class LoadSessionResultPromise;
void Dispose();
void ActionTimerFired(TimerBase*);
// The following perform the asynchronous part of the command referenced.
void GenerateRequestTask(ContentDecryptionModuleResult*,
media::EmeInitDataType,
DOMArrayBuffer* init_data_buffer);
void FinishGenerateRequest();
void LoadTask(ContentDecryptionModuleResult*, const String& session_id);
void FinishLoad();
void UpdateTask(ContentDecryptionModuleResult*,
DOMArrayBuffer* sanitized_response);
void CloseTask(ContentDecryptionModuleResult*);
void RemoveTask(ContentDecryptionModuleResult*);
// WebContentDecryptionModuleSession::Client
void OnSessionMessage(MessageType,
const unsigned char* message,
size_t message_length) override;
void OnSessionClosed() override;
void OnSessionExpirationUpdate(double updated_expiry_time_in_ms) override;
void OnSessionKeysChange(const WebVector<WebEncryptedMediaKeyInformation>&,
bool has_additional_usable_key) override;
Member<EventQueue> async_event_queue_;
std::unique_ptr<WebContentDecryptionModuleSession> session_;
// Used to determine if MediaKeys is still active.
WeakMember<MediaKeys> media_keys_;
// Session properties.
String session_id_;
WebEncryptedMediaSessionType session_type_;
double expiration_;
Member<MediaKeyStatusMap> key_statuses_map_;
// Session states.
bool is_uninitialized_;
bool is_callable_;
bool is_closing_or_closed_;
// Keep track of the closed promise.
typedef ScriptPromiseProperty<ToV8UndefinedGenerator, Member<DOMException>>
ClosedPromise;
Member<ClosedPromise> closed_promise_;
HeapDeque<Member<PendingAction>> pending_actions_;
HeapTaskRunnerTimer<MediaKeySession> action_timer_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_ENCRYPTEDMEDIA_MEDIA_KEY_SESSION_H_
|
