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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/blink/cdm_session_adapter.h"
#include <utility>
#include "base/bind.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_functions.h"
#include "base/stl_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/trace_event/trace_event.h"
#include "media/base/cdm_factory.h"
#include "media/base/cdm_key_information.h"
#include "media/base/cdm_promise.h"
#include "media/base/key_systems.h"
#include "media/blink/webcontentdecryptionmodule_impl.h"
#include "media/blink/webcontentdecryptionmodulesession_impl.h"
#include "url/gurl.h"
namespace media {
namespace {
const char kMediaEME[] = "Media.EME.";
const char kDot[] = ".";
const char kTimeToCreateCdmUMAName[] = "CreateCdmTime";
} // namespace
CdmSessionAdapter::CdmSessionAdapter()
: trace_id_(0), weak_ptr_factory_(this) {}
CdmSessionAdapter::~CdmSessionAdapter() {}
void CdmSessionAdapter::CreateCdm(
CdmFactory* cdm_factory,
const std::string& key_system,
const GURL& security_origin,
const CdmConfig& cdm_config,
std::unique_ptr<blink::WebContentDecryptionModuleResult> result) {
TRACE_EVENT_ASYNC_BEGIN0("media", "CdmSessionAdapter::CreateCdm",
++trace_id_);
base::TimeTicks start_time = base::TimeTicks::Now();
// Note: WebContentDecryptionModuleImpl::Create() calls this method without
// holding a reference to the CdmSessionAdapter. Bind OnCdmCreated() with
// |this| instead of |weak_this| to prevent |this| from being destructed.
base::WeakPtr<CdmSessionAdapter> weak_this = weak_ptr_factory_.GetWeakPtr();
DCHECK(!cdm_created_result_);
cdm_created_result_ = std::move(result);
cdm_factory->Create(
key_system, security_origin, cdm_config,
base::Bind(&CdmSessionAdapter::OnSessionMessage, weak_this),
base::Bind(&CdmSessionAdapter::OnSessionClosed, weak_this),
base::Bind(&CdmSessionAdapter::OnSessionKeysChange, weak_this),
base::Bind(&CdmSessionAdapter::OnSessionExpirationUpdate, weak_this),
base::Bind(&CdmSessionAdapter::OnCdmCreated, this, key_system,
start_time));
}
void CdmSessionAdapter::SetServerCertificate(
const std::vector<uint8_t>& certificate,
std::unique_ptr<SimpleCdmPromise> promise) {
cdm_->SetServerCertificate(certificate, std::move(promise));
}
WebContentDecryptionModuleSessionImpl* CdmSessionAdapter::CreateSession() {
return new WebContentDecryptionModuleSessionImpl(this);
}
bool CdmSessionAdapter::RegisterSession(
const std::string& session_id,
base::WeakPtr<WebContentDecryptionModuleSessionImpl> session) {
// If this session ID is already registered, don't register it again.
if (base::ContainsKey(sessions_, session_id))
return false;
sessions_[session_id] = session;
return true;
}
void CdmSessionAdapter::UnregisterSession(const std::string& session_id) {
DCHECK(base::ContainsKey(sessions_, session_id));
sessions_.erase(session_id);
}
void CdmSessionAdapter::InitializeNewSession(
EmeInitDataType init_data_type,
const std::vector<uint8_t>& init_data,
CdmSessionType session_type,
std::unique_ptr<NewSessionCdmPromise> promise) {
cdm_->CreateSessionAndGenerateRequest(session_type, init_data_type, init_data,
std::move(promise));
}
void CdmSessionAdapter::LoadSession(
CdmSessionType session_type,
const std::string& session_id,
std::unique_ptr<NewSessionCdmPromise> promise) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
cdm_->LoadSession(session_type, session_id, std::move(promise));
}
void CdmSessionAdapter::UpdateSession(
const std::string& session_id,
const std::vector<uint8_t>& response,
std::unique_ptr<SimpleCdmPromise> promise) {
DVLOG(3) << __func__ << ": session_id = " << session_id;
cdm_->UpdateSession(session_id, response, std::move(promise));
}
void CdmSessionAdapter::CloseSession(
const std::string& session_id,
std::unique_ptr<SimpleCdmPromise> promise) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
cdm_->CloseSession(session_id, std::move(promise));
}
void CdmSessionAdapter::RemoveSession(
const std::string& session_id,
std::unique_ptr<SimpleCdmPromise> promise) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
cdm_->RemoveSession(session_id, std::move(promise));
}
scoped_refptr<ContentDecryptionModule> CdmSessionAdapter::GetCdm() {
return cdm_;
}
const std::string& CdmSessionAdapter::GetKeySystem() const {
return key_system_;
}
const std::string& CdmSessionAdapter::GetKeySystemUMAPrefix() const {
DCHECK(!key_system_uma_prefix_.empty());
return key_system_uma_prefix_;
}
void CdmSessionAdapter::OnCdmCreated(
const std::string& key_system,
base::TimeTicks start_time,
const scoped_refptr<ContentDecryptionModule>& cdm,
const std::string& error_message) {
DVLOG(1) << __func__ << ": "
<< (cdm ? "success" : "failure (" + error_message + ")");
DCHECK(!cdm_);
TRACE_EVENT_ASYNC_END2("media", "CdmSessionAdapter::CreateCdm", trace_id_,
"success", (cdm ? "true" : "false"), "error_message",
error_message);
if (!cdm) {
cdm_created_result_->CompleteWithError(
blink::kWebContentDecryptionModuleExceptionNotSupportedError, 0,
blink::WebString::FromUTF8(error_message));
cdm_created_result_.reset();
return;
}
key_system_ = key_system;
key_system_uma_prefix_ =
kMediaEME + GetKeySystemNameForUMA(key_system) + kDot;
// Only report time for successful CDM creation.
base::UmaHistogramTimes(key_system_uma_prefix_ + kTimeToCreateCdmUMAName,
base::TimeTicks::Now() - start_time);
cdm_ = cdm;
cdm_created_result_->CompleteWithContentDecryptionModule(
new WebContentDecryptionModuleImpl(this));
cdm_created_result_.reset();
}
void CdmSessionAdapter::OnSessionMessage(const std::string& session_id,
CdmMessageType message_type,
const std::vector<uint8_t>& message) {
WebContentDecryptionModuleSessionImpl* session = GetSession(session_id);
DLOG_IF(WARNING, !session) << __func__ << " for unknown session "
<< session_id;
if (session) {
DVLOG(3) << __func__ << ": session_id = " << session_id;
session->OnSessionMessage(message_type, message);
}
}
void CdmSessionAdapter::OnSessionKeysChange(const std::string& session_id,
bool has_additional_usable_key,
CdmKeysInfo keys_info) {
WebContentDecryptionModuleSessionImpl* session = GetSession(session_id);
DLOG_IF(WARNING, !session) << __func__ << " for unknown session "
<< session_id;
if (session) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
DVLOG(2) << " - has_additional_usable_key = " << has_additional_usable_key;
for (const auto& info : keys_info)
DVLOG(2) << " - " << *(info.get());
session->OnSessionKeysChange(has_additional_usable_key,
std::move(keys_info));
}
}
void CdmSessionAdapter::OnSessionExpirationUpdate(const std::string& session_id,
base::Time new_expiry_time) {
WebContentDecryptionModuleSessionImpl* session = GetSession(session_id);
DLOG_IF(WARNING, !session) << __func__ << " for unknown session "
<< session_id;
if (session) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
if (new_expiry_time.is_null())
DVLOG(2) << " - new_expiry_time = NaN";
else
DVLOG(2) << " - new_expiry_time = " << new_expiry_time;
session->OnSessionExpirationUpdate(new_expiry_time);
}
}
void CdmSessionAdapter::OnSessionClosed(const std::string& session_id) {
WebContentDecryptionModuleSessionImpl* session = GetSession(session_id);
DLOG_IF(WARNING, !session) << __func__ << " for unknown session "
<< session_id;
if (session) {
DVLOG(2) << __func__ << ": session_id = " << session_id;
session->OnSessionClosed();
}
}
WebContentDecryptionModuleSessionImpl* CdmSessionAdapter::GetSession(
const std::string& session_id) {
// Since session objects may get garbage collected, it is possible that there
// are events coming back from the CDM and the session has been unregistered.
// We can not tell if the CDM is firing events at sessions that never existed.
SessionMap::iterator session = sessions_.find(session_id);
return (session != sessions_.end()) ? session->second.get() : NULL;
}
} // namespace media
|
