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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_PLATFORM_SENSOR_READER_WIN_H_ |
| 6 #define DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_READER_WIN_H_ |
| 7 |
| 8 #include <SensorsApi.h> |
| 9 |
| 10 #include "base/win/scoped_comptr.h" |
| 11 #include "device/generic_sensor/public/interfaces/sensor.mojom.h" |
| 12 |
| 13 namespace device { |
| 14 |
| 15 class PlatformSensorConfiguration; |
| 16 struct ReaderInitParams; |
| 17 struct SensorReading; |
| 18 |
| 19 // Generic class that uses ISensor interface to fetch sensor data. Used |
| 20 // by PlatformSensorWin and delivers notifications via Client interface. |
| 21 // Instances of this class must be created and destructed on the same thread. |
| 22 class PlatformSensorReaderWin { |
| 23 public: |
| 24 // Client interface that can be used to receive notifications about sensor |
| 25 // error or data change events. |
| 26 class Client { |
| 27 public: |
| 28 virtual void OnReadingUpdated(const SensorReading& reading) = 0; |
| 29 virtual void OnSensorError() = 0; |
| 30 |
| 31 protected: |
| 32 virtual ~Client() {} |
| 33 }; |
| 34 |
| 35 static std::unique_ptr<PlatformSensorReaderWin> Create( |
| 36 mojom::SensorType type, |
| 37 base::win::ScopedComPtr<ISensorManager> sensor_manager); |
| 38 |
| 39 // Following methods are thread safe. |
| 40 void SetClient(Client* client); |
| 41 unsigned long GetMinimalReportingIntervalMs() const; |
| 42 mojom::ReportingMode GetReportingMode() const; |
| 43 bool StartSensor(const PlatformSensorConfiguration& configuration); |
| 44 void StopSensor(); |
| 45 |
| 46 // Must be destructed on the same thread that was used during construction. |
| 47 ~PlatformSensorReaderWin(); |
| 48 |
| 49 private: |
| 50 PlatformSensorReaderWin(base::win::ScopedComPtr<ISensor> sensor, |
| 51 std::unique_ptr<ReaderInitParams> params); |
| 52 |
| 53 static base::win::ScopedComPtr<ISensor> GetSensorForType( |
| 54 REFSENSOR_TYPE_ID sensor_type, |
| 55 base::win::ScopedComPtr<ISensorManager> sensor_manager); |
| 56 |
| 57 bool SetReportingInterval(const PlatformSensorConfiguration& configuration); |
| 58 HRESULT SensorReadingChanged(ISensorDataReport& report, |
| 59 SensorReading& reading) const; |
| 60 void SensorError(); |
| 61 |
| 62 private: |
| 63 friend class EventListener; |
| 64 |
| 65 const std::unique_ptr<ReaderInitParams> init_params_; |
| 66 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| 67 // Following class members are protected by lock, because SetClient, |
| 68 // StartSensor and StopSensor are called from another thread by |
| 69 // PlatformSensorWin that can modify internal state of the object. |
| 70 base::Lock lock_; |
| 71 bool sensor_active_; |
| 72 Client* client_; |
| 73 base::win::ScopedComPtr<ISensor> sensor_; |
| 74 scoped_refptr<EventListener> event_listener_; |
| 75 |
| 76 DISALLOW_COPY_AND_ASSIGN(PlatformSensorReaderWin); |
| 77 }; |
| 78 |
| 79 } // namespace device |
| 80 |
| 81 #endif // DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_READER_WIN_H_ |
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