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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 #ifndef DEVICE_GENERIC_SENSOR_LINUX_PLATFORM_SENSOR_UTILS_LINUX_H_ | |
6 #define DEVICE_GENERIC_SENSOR_LINUX_PLATFORM_SENSOR_UTILS_LINUX_H_ | |
7 | |
8 #include "base/files/file_path.h" | |
9 #include "base/memory/ptr_util.h" | |
10 #include "device/generic_sensor/generic_sensor_export.h" | |
11 #include "device/generic_sensor/linux/sensor_data_linux.h" | |
12 | |
13 namespace device { | |
14 | |
15 struct SensorDataLinux; | |
16 struct SensorReading; | |
17 | |
18 // Generic reader class that reads sensors data from | |
19 // sensors files located in the base iio folder. | |
20 class DEVICE_GENERIC_SENSOR_EXPORT SensorReader { | |
21 public: | |
22 ~SensorReader(); | |
23 | |
24 // Creates a new instance of SensorReader if sensor read files | |
25 // has been found and |sensor_paths_| are set. | |
26 static std::unique_ptr<SensorReader> Create(const SensorDataLinux& data); | |
27 | |
28 // Reads sensor values into |*reading| from sensor files | |
29 // specified in |sensor_paths_|. | |
30 bool ReadSensorReading(SensorReading* reading); | |
31 | |
32 private: | |
33 SensorReader(std::vector<base::FilePath> sensor_paths, | |
34 double scaling_value, | |
35 const SensorDataLinux::ReaderFunctor& apply_scaling_func); | |
36 | |
37 // Contains paths to sensor files that are set when | |
38 // Create() is called. | |
39 const std::vector<base::FilePath> sensor_paths_; | |
40 | |
41 // Scaling values that are applied to raw data from sensors. | |
42 const double scaling_value_; | |
43 | |
44 // Used to apply scalings and invert signs if needed. | |
45 const SensorDataLinux::ReaderFunctor apply_scaling_func_; | |
46 | |
47 DISALLOW_COPY_AND_ASSIGN(SensorReader); | |
48 }; | |
49 | |
50 } // namespace device | |
51 | |
52 #endif // DEVICE_GENERIC_SENSOR_LINUX_PLATFORM_SENSOR_UTILS_LINUX_H_ | |
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