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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 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 "device/generic_sensor/platform_sensor_accelerometer_mac.h" | 5 #include "services/device/generic_sensor/platform_sensor_accelerometer_mac.h" |
| 6 | 6 |
| 7 #include <stdint.h> | 7 #include <stdint.h> |
| 8 | 8 |
| 9 #include <cmath> | 9 #include <cmath> |
| 10 | 10 |
| 11 #include "base/bind.h" | 11 #include "base/bind.h" |
| 12 #include "device/base/synchronization/shared_memory_seqlock_buffer.h" | 12 #include "device/base/synchronization/shared_memory_seqlock_buffer.h" |
| 13 #include "device/generic_sensor/generic_sensor_consts.h" | 13 #include "services/device/generic_sensor/generic_sensor_consts.h" |
| 14 #include "device/generic_sensor/platform_sensor_provider_mac.h" | 14 #include "services/device/generic_sensor/platform_sensor_provider_mac.h" |
| 15 #include "third_party/sudden_motion_sensor/sudden_motion_sensor_mac.h" | 15 #include "third_party/sudden_motion_sensor/sudden_motion_sensor_mac.h" |
| 16 | 16 |
| 17 namespace { | 17 namespace { |
| 18 | 18 |
| 19 constexpr double kMeanGravity = 9.80665; | 19 constexpr double kMeanGravity = 9.80665; |
| 20 | 20 |
| 21 constexpr double kGravityThreshold = kMeanGravity * 0.01; | 21 constexpr double kGravityThreshold = kMeanGravity * 0.01; |
| 22 | 22 |
| 23 bool IsSignificantlyDifferent(const device::SensorReading& reading1, | 23 bool IsSignificantlyDifferent(const device::SensorReading& reading1, |
| 24 const device::SensorReading& reading2) { | 24 const device::SensorReading& reading2) { |
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| 94 reading.values[1] = axis_value[1] * kMeanGravity; | 94 reading.values[1] = axis_value[1] * kMeanGravity; |
| 95 reading.values[2] = axis_value[2] * kMeanGravity; | 95 reading.values[2] = axis_value[2] * kMeanGravity; |
| 96 | 96 |
| 97 if (IsSignificantlyDifferent(reading_, reading)) { | 97 if (IsSignificantlyDifferent(reading_, reading)) { |
| 98 reading_ = reading; | 98 reading_ = reading; |
| 99 UpdateSensorReading(reading, true); | 99 UpdateSensorReading(reading, true); |
| 100 } | 100 } |
| 101 } | 101 } |
| 102 | 102 |
| 103 } // namespace device | 103 } // namespace device |
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