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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "device/generic_sensor/platform_sensor_linux.h" | |
| 6 | |
| 7 #include "base/threading/thread.h" | |
| 8 #include "base/timer/timer.h" | |
| 9 #include "device/generic_sensor/linux/platform_sensor_utils_linux.h" | |
| 10 #include "device/generic_sensor/linux/sensor_data_linux.h" | |
| 11 | |
| 12 namespace device { | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 // Checks if at least one value has been changed. | |
| 17 bool HaveValuesChanged(const SensorReading& lhs, const SensorReading& rhs) { | |
| 18 return lhs.values[0] != rhs.values[0] || lhs.values[1] != rhs.values[1] || | |
| 19 lhs.values[2] != rhs.values[2]; | |
| 20 } | |
| 21 | |
| 22 } // namespace | |
| 23 | |
| 24 PlatformSensorLinux::PlatformSensorLinux( | |
| 25 mojom::SensorType type, | |
| 26 mojo::ScopedSharedBufferMapping mapping, | |
| 27 PlatformSensorProvider* provider, | |
| 28 const SensorDataLinux& data, | |
| 29 std::unique_ptr<SensorReader> sensor_reader, | |
| 30 scoped_refptr<base::SingleThreadTaskRunner> polling_thread_task_runner_) | |
| 31 : PlatformSensor(type, std::move(mapping), provider), | |
| 32 timer_(new base::RepeatingTimer()), | |
| 33 default_configuration_(data.default_configuration), | |
| 34 reporting_mode_(data.reporting_mode), | |
| 35 sensor_reader_(std::move(sensor_reader)), | |
| 36 polling_thread_task_runner_(polling_thread_task_runner_), | |
| 37 weak_factory_(this) {} | |
| 38 | |
| 39 PlatformSensorLinux::~PlatformSensorLinux() { | |
| 40 polling_thread_task_runner_->DeleteSoon(FROM_HERE, timer_); | |
| 41 } | |
| 42 | |
| 43 mojom::ReportingMode PlatformSensorLinux::GetReportingMode() { | |
| 44 return reporting_mode_; | |
| 45 } | |
| 46 | |
| 47 bool PlatformSensorLinux::StartSensor( | |
| 48 const PlatformSensorConfiguration& configuration) { | |
| 49 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 50 return polling_thread_task_runner_->PostTask( | |
| 51 FROM_HERE, base::Bind(&PlatformSensorLinux::BeginPoll, | |
| 52 weak_factory_.GetWeakPtr(), configuration)); | |
| 53 } | |
| 54 | |
| 55 void PlatformSensorLinux::StopSensor() { | |
| 56 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 57 polling_thread_task_runner_->PostTask( | |
| 58 FROM_HERE, base::Bind(&PlatformSensorLinux::StopPoll, this)); | |
| 59 } | |
| 60 | |
| 61 bool PlatformSensorLinux::CheckSensorConfiguration( | |
| 62 const PlatformSensorConfiguration& configuration) { | |
| 63 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 64 // TODO(maksims): make this sensor dependent. | |
| 65 // For example, in case of accelerometer, check current polling frequency | |
| 66 // exposed by iio driver. | |
| 67 return configuration.frequency() > 0 && | |
| 68 configuration.frequency() <= | |
| 69 mojom::SensorConfiguration::kMaxAllowedFrequency; | |
| 70 } | |
| 71 | |
| 72 PlatformSensorConfiguration PlatformSensorLinux::GetDefaultConfiguration() { | |
| 73 DCHECK(task_runner_->BelongsToCurrentThread()); | |
| 74 return default_configuration_; | |
| 75 } | |
| 76 | |
| 77 void PlatformSensorLinux::BeginPoll( | |
| 78 const PlatformSensorConfiguration& configuration) { | |
| 79 DCHECK(polling_thread_task_runner_->BelongsToCurrentThread()); | |
| 80 timer_->Start(FROM_HERE, base::TimeDelta::FromMicroseconds( | |
| 81 base::Time::kMicrosecondsPerSecond / | |
| 82 configuration.frequency()), | |
| 83 this, &PlatformSensorLinux::PollForReadingData); | |
| 84 } | |
| 85 | |
| 86 void PlatformSensorLinux::StopPoll() { | |
| 87 DCHECK(polling_thread_task_runner_->BelongsToCurrentThread()); | |
| 88 timer_->Stop(); | |
| 89 } | |
| 90 | |
| 91 void PlatformSensorLinux::PollForReadingData() { | |
| 92 DCHECK(polling_thread_task_runner_->BelongsToCurrentThread()); | |
| 93 | |
| 94 SensorReading reading; | |
| 95 if (!sensor_reader_->ReadSensorReading(&reading)) { | |
| 96 task_runner_->PostTask( | |
| 97 FROM_HERE, base::Bind(&PlatformSensorLinux::NotifySensorError, this)); | |
| 98 StopPoll(); | |
| 99 return; | |
| 100 } | |
| 101 | |
| 102 bool notifyNeeded = false; | |
| 103 if (GetReportingMode() == mojom::ReportingMode::ON_CHANGE) { | |
| 104 if (!HaveValuesChanged(reading, old_values_)) | |
| 105 return; | |
| 106 notifyNeeded = true; | |
| 107 } | |
| 108 | |
| 109 old_values_ = reading; | |
| 110 reading.timestamp = (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF(); | |
| 111 UpdateSensorReading(reading, notifyNeeded); | |
| 112 } | |
| 113 | |
| 114 } // namespace device | |
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Chromium Code Reviews
Issue 2468283003:
Revert of [sensors] Ambient light sensor implementation for ChromeOS and Linux. (Closed)
