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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chromeos/accelerometer/accelerometer_reader.h" | 5 #include "chromeos/accelerometer/accelerometer_reader.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/files/file_util.h" | 8 #include "base/files/file_util.h" |
9 #include "base/location.h" | 9 #include "base/location.h" |
10 #include "base/message_loop/message_loop.h" | 10 #include "base/message_loop/message_loop.h" |
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152 AccelerometerReader::ConfigurationData::~ConfigurationData() { | 152 AccelerometerReader::ConfigurationData::~ConfigurationData() { |
153 } | 153 } |
154 | 154 |
155 AccelerometerReader::AccelerometerReader( | 155 AccelerometerReader::AccelerometerReader( |
156 base::TaskRunner* task_runner, | 156 base::TaskRunner* task_runner, |
157 AccelerometerReader::Delegate* delegate) | 157 AccelerometerReader::Delegate* delegate) |
158 : task_runner_(task_runner), | 158 : task_runner_(task_runner), |
159 delegate_(delegate), | 159 delegate_(delegate), |
160 configuration_(new AccelerometerReader::Configuration()), | 160 configuration_(new AccelerometerReader::Configuration()), |
161 weak_factory_(this) { | 161 weak_factory_(this) { |
162 DCHECK(task_runner_); | 162 DCHECK(task_runner_.get()); |
163 DCHECK(delegate_); | 163 DCHECK(delegate_); |
164 // Asynchronously detect and initialize the accelerometer to avoid delaying | 164 // Asynchronously detect and initialize the accelerometer to avoid delaying |
165 // startup. | 165 // startup. |
166 base::PostTaskAndReplyWithResult(task_runner_.get(), FROM_HERE, | 166 base::PostTaskAndReplyWithResult(task_runner_.get(), FROM_HERE, |
167 base::Bind(&DetectAndReadAccelerometerConfiguration, configuration_), | 167 base::Bind(&DetectAndReadAccelerometerConfiguration, configuration_), |
168 base::Bind(&AccelerometerReader::OnInitialized, | 168 base::Bind(&AccelerometerReader::OnInitialized, |
169 weak_factory_.GetWeakPtr(), configuration_)); | 169 weak_factory_.GetWeakPtr(), configuration_)); |
170 } | 170 } |
171 | 171 |
172 AccelerometerReader::~AccelerometerReader() { | 172 AccelerometerReader::~AccelerometerReader() { |
173 } | 173 } |
174 | 174 |
175 void AccelerometerReader::OnInitialized( | 175 void AccelerometerReader::OnInitialized( |
176 scoped_refptr<AccelerometerReader::Configuration> configuration, | 176 scoped_refptr<AccelerometerReader::Configuration> configuration, |
177 bool success) { | 177 bool success) { |
178 if (success) | 178 if (success) |
179 TriggerRead(); | 179 TriggerRead(); |
180 } | 180 } |
181 | 181 |
182 void AccelerometerReader::TriggerRead() { | 182 void AccelerometerReader::TriggerRead() { |
183 DCHECK(!task_runner_->RunsTasksOnCurrentThread()); | 183 DCHECK(!task_runner_->RunsTasksOnCurrentThread()); |
184 | 184 |
185 scoped_refptr<AccelerometerReader::Reading> reading( | 185 scoped_refptr<AccelerometerReader::Reading> reading( |
186 new AccelerometerReader::Reading()); | 186 new AccelerometerReader::Reading()); |
187 base::PostTaskAndReplyWithResult(task_runner_, FROM_HERE, | 187 base::PostTaskAndReplyWithResult(task_runner_.get(), |
188 base::Bind(&ReadAccelerometer, reading), | 188 FROM_HERE, |
189 base::Bind(&AccelerometerReader::OnDataRead, | 189 base::Bind(&ReadAccelerometer, reading), |
190 weak_factory_.GetWeakPtr(), reading)); | 190 base::Bind(&AccelerometerReader::OnDataRead, |
| 191 weak_factory_.GetWeakPtr(), |
| 192 reading)); |
191 } | 193 } |
192 | 194 |
193 void AccelerometerReader::OnDataRead( | 195 void AccelerometerReader::OnDataRead( |
194 scoped_refptr<AccelerometerReader::Reading> reading, | 196 scoped_refptr<AccelerometerReader::Reading> reading, |
195 bool success) { | 197 bool success) { |
196 DCHECK(!task_runner_->RunsTasksOnCurrentThread()); | 198 DCHECK(!task_runner_->RunsTasksOnCurrentThread()); |
197 | 199 |
198 if (success) { | 200 if (success) { |
199 int16* values = reinterpret_cast<int16*>(reading->data); | 201 int16* values = reinterpret_cast<int16*>(reading->data); |
200 float lid_scale = kMeanGravity / configuration_->data.lid_scale; | 202 float lid_scale = kMeanGravity / configuration_->data.lid_scale; |
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212 | 214 |
213 // Trigger another read after the current sampling delay. | 215 // Trigger another read after the current sampling delay. |
214 base::MessageLoop::current()->PostDelayedTask( | 216 base::MessageLoop::current()->PostDelayedTask( |
215 FROM_HERE, | 217 FROM_HERE, |
216 base::Bind(&AccelerometerReader::TriggerRead, | 218 base::Bind(&AccelerometerReader::TriggerRead, |
217 weak_factory_.GetWeakPtr()), | 219 weak_factory_.GetWeakPtr()), |
218 base::TimeDelta::FromMilliseconds(kDelayBetweenReadsMs)); | 220 base::TimeDelta::FromMilliseconds(kDelayBetweenReadsMs)); |
219 } | 221 } |
220 | 222 |
221 } // namespace chromeos | 223 } // namespace chromeos |
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