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
3 // found in the LICENSE file.
5 #ifndef CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_
6 #define CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_
8 #include "base/android/scoped_java_ref.h"
9 #include "base/memory/scoped_ptr.h"
10 #include "base/synchronization/lock.h"
11 #include "content/common/content_export.h"
12 #include "content/common/device_sensors/device_light_hardware_buffer.h"
13 #include "content/common/device_sensors/device_motion_hardware_buffer.h"
14 #include "content/common/device_sensors/device_orientation_hardware_buffer.h"
16 template<typename T> struct DefaultSingletonTraits;
20 // Android implementation of Device {Motion|Orientation|Light} API.
22 // Android's SensorManager has a push API, so when Got*() methods are called
23 // by the system the browser process puts the received data into a shared
24 // memory buffer, which is read by the renderer processes.
25 class CONTENT_EXPORT SensorManagerAndroid {
27 // Must be called at startup, before GetInstance().
28 static bool Register(JNIEnv* env);
30 // Needs to be thread-safe, because accessed from different threads.
31 static SensorManagerAndroid* GetInstance();
33 // Called from Java via JNI.
34 void GotLight(JNIEnv*, jobject, double value);
35 void GotOrientation(JNIEnv*, jobject,
36 double alpha, double beta, double gamma);
37 void GotAcceleration(JNIEnv*, jobject,
38 double x, double y, double z);
39 void GotAccelerationIncludingGravity(JNIEnv*, jobject,
40 double x, double y, double z);
41 void GotRotationRate(JNIEnv*, jobject,
42 double alpha, double beta, double gamma);
44 // Shared memory related methods.
45 bool StartFetchingDeviceLightData(DeviceLightHardwareBuffer* buffer);
46 void StopFetchingDeviceLightData();
48 bool StartFetchingDeviceMotionData(DeviceMotionHardwareBuffer* buffer);
49 void StopFetchingDeviceMotionData();
51 bool StartFetchingDeviceOrientationData(
52 DeviceOrientationHardwareBuffer* buffer);
53 void StopFetchingDeviceOrientationData();
57 // These constants should match DEVICE_ORIENTATION, DEVICE_MOTION and
58 // DEVICE_LIGHT constants in content/public/android/java/src/org/
59 // chromium/content/browser/DeviceSensors.java
65 SensorManagerAndroid();
66 virtual ~SensorManagerAndroid();
68 virtual bool Start(EventType event_type);
69 virtual void Stop(EventType event_type);
70 virtual int GetNumberActiveDeviceMotionSensors();
73 friend struct DefaultSingletonTraits<SensorManagerAndroid>;
76 RECEIVED_MOTION_DATA_ACCELERATION = 0,
77 RECEIVED_MOTION_DATA_ACCELERATION_INCL_GRAVITY = 1,
78 RECEIVED_MOTION_DATA_ROTATION_RATE = 2,
79 RECEIVED_MOTION_DATA_MAX = 3,
82 void SetLightBufferValue(double lux);
84 void CheckMotionBufferReadyToRead();
85 void SetMotionBufferReadyStatus(bool ready);
86 void ClearInternalMotionBuffers();
88 void SetOrientationBufferReadyStatus(bool ready);
90 // The Java provider of sensors info.
91 base::android::ScopedJavaGlobalRef<jobject> device_sensors_;
92 int number_active_device_motion_sensors_;
93 int received_motion_data_[RECEIVED_MOTION_DATA_MAX];
94 DeviceLightHardwareBuffer* device_light_buffer_;
95 DeviceMotionHardwareBuffer* device_motion_buffer_;
96 DeviceOrientationHardwareBuffer* device_orientation_buffer_;
97 bool is_light_buffer_ready_;
98 bool is_motion_buffer_ready_;
99 bool is_orientation_buffer_ready_;
101 base::Lock light_buffer_lock_;
102 base::Lock motion_buffer_lock_;
103 base::Lock orientation_buffer_lock_;
105 DISALLOW_COPY_AND_ASSIGN(SensorManagerAndroid);
108 } // namespace content
110 #endif // CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_