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
245
246
247
248
249
250
251
252
253
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/permissions/prediction_service/prediction_signature_model_executor.h"
#include "components/permissions/prediction_service/prediction_common.h"
#include "third_party/tflite_support/src/tensorflow_lite_support/cc/task/core/task_utils.h"
namespace permissions {
PredictionSignatureModelExecutor::PredictionSignatureModelExecutor() = default;
PredictionSignatureModelExecutor::~PredictionSignatureModelExecutor() = default;
bool PredictionSignatureModelExecutor::Preprocess(
const std::map<std::string, TfLiteTensor*>& input_tensors,
const PredictionModelExecutorInput& input) {
model_metadata_ = input.metadata;
switch (input.request.permission_features()[0].permission_type_case()) {
case PermissionFeatures::kNotificationPermission:
request_type_ = RequestType::kNotifications;
break;
case PermissionFeatures::kGeolocationPermission:
request_type_ = RequestType::kGeolocation;
break;
default:
NOTREACHED();
}
auto itr = input_tensors.find("AvgClientDenyRate");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find AvgClientDenyRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.client_features().client_stats().avg_deny_rate(),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate AvgClientDenyRate input tensor";
return false;
}
itr = input_tensors.find("AvgClientDismissRate");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find AvgClientDismissRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.client_features().client_stats().avg_dismiss_rate(),
itr->second)
.ok()) {
LOG(WARNING)
<< "[CPSS] Failed to populate AvgClientDismissRate input tensor";
return false;
}
itr = input_tensors.find("AvgClientGrantRate");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find AvgClientGrantRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.client_features().client_stats().avg_grant_rate(),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate AvgClientGrantRate input tensor";
return false;
}
itr = input_tensors.find("AvgClientIgnoreRate");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find AvgClientIgnoreRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.client_features().client_stats().avg_ignore_rate(),
itr->second)
.ok()) {
LOG(WARNING)
<< "[CPSS] Failed to populate AvgClientIgnoreRate input tensor";
return false;
}
itr = input_tensors.find("AvgClientPermissionDenyRate");
if (itr == input_tensors.end()) {
LOG(WARNING)
<< "[CPSS] Failed to find AvgClientPermissionDenyRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.permission_features()[0]
.permission_stats()
.avg_deny_rate(),
itr->second)
.ok()) {
LOG(WARNING)
<< "[CPSS] Failed to populate AvgClientPermissionDenyRate input tensor";
return false;
}
itr = input_tensors.find("AvgClientPermissionDismissRate");
if (itr == input_tensors.end()) {
LOG(WARNING)
<< "[CPSS] Failed to find AvgClientPermissionDismissRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.permission_features()[0]
.permission_stats()
.avg_dismiss_rate(),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate AvgClientPermissionDismissRate "
"input tensor";
return false;
}
itr = input_tensors.find("AvgClientPermissionGrantRate");
if (itr == input_tensors.end()) {
LOG(WARNING)
<< "[CPSS] Failed to find AvgClientPermissionGrantRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.permission_features()[0]
.permission_stats()
.avg_grant_rate(),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate AvgClientPermissionGrantRate "
"input tensor";
return false;
}
itr = input_tensors.find("AvgClientPermissionIgnoreRate");
if (itr == input_tensors.end()) {
LOG(WARNING)
<< "[CPSS] Failed to find AvgClientPermissionIgnoreRate input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<float>(
input.request.permission_features()[0]
.permission_stats()
.avg_ignore_rate(),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate AvgClientPermissionIgnoreRate "
"input tensor";
return false;
}
itr = input_tensors.find("ClientTotalPermissionPrompts");
if (itr == input_tensors.end()) {
LOG(WARNING)
<< "[CPSS] Failed to find ClientTotalPermissionPrompts input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<int64_t>(
static_cast<int64_t>(input.request.permission_features()[0]
.permission_stats()
.prompts_count()),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate ClientTotalPermissionPrompts "
"input tensor";
return false;
}
itr = input_tensors.find("ClientTotalPrompts");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find ClientTotalPrompts input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<int64_t>(
static_cast<int64_t>(
input.request.client_features().client_stats().prompts_count()),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate ClientTotalPrompts input tensor";
return false;
}
itr = input_tensors.find("GestureEnum");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find GestureEnum input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<int64_t>(
static_cast<int64_t>(input.request.client_features().gesture_enum()),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate GestureEnum input tensor";
return false;
}
itr = input_tensors.find("PlatformEnum");
if (itr == input_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find PlatformEnum input tensor";
return false;
}
if (!tflite::task::core::PopulateTensor<int64_t>(
static_cast<int64_t>(
input.request.client_features().platform_enum()),
itr->second)
.ok()) {
LOG(WARNING) << "[CPSS] Failed to populate PlatformEnum input tensor";
return false;
}
return true;
}
std::optional<GeneratePredictionsResponse>
PredictionSignatureModelExecutor::Postprocess(
const std::map<std::string, const TfLiteTensor*>& output_tensors) {
DCHECK(request_type_ == RequestType::kNotifications ||
request_type_ == RequestType::kGeolocation);
if (!model_metadata_ || !model_metadata_->has_not_grant_thresholds()) {
LOG(WARNING)
<< "[CPSS] Failed to read signature model thresholds from metadata";
return std::nullopt;
}
auto itr = output_tensors.find("outputs");
if (itr == output_tensors.end()) {
LOG(WARNING) << "[CPSS] Failed to find outputs tensor";
return std::nullopt;
}
std::vector<float> data;
if (!tflite::task::core::PopulateVector<float>(itr->second, &data).ok()) {
LOG(WARNING) << "[CPSS] Failed to read from outputs tensor";
return std::nullopt;
}
// max_likely represents very likely to not grant
float threshold = model_metadata_->not_grant_thresholds().max_likely();
GeneratePredictionsResponse response;
response.mutable_prediction()
->Add()
->mutable_grant_likelihood()
->set_discretized_likelihood(
data[0] > threshold
? PermissionPrediction_Likelihood_DiscretizedLikelihood_VERY_UNLIKELY
: PermissionPrediction_Likelihood_DiscretizedLikelihood_DISCRETIZED_LIKELIHOOD_UNSPECIFIED);
return response;
}
const char* PredictionSignatureModelExecutor::GetSignature() {
return "serving_default";
}
} // namespace permissions
|
