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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ | 5 #ifndef CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ |
6 #define CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ | 6 #define CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ |
7 | 7 |
8 #include "base/android/scoped_java_ref.h" | 8 #include "base/android/scoped_java_ref.h" |
9 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
10 #include "base/synchronization/lock.h" | 10 #include "base/synchronization/lock.h" |
11 #include "content/browser/device_orientation/data_fetcher.h" | |
12 #include "content/browser/device_orientation/device_data.h" | 11 #include "content/browser/device_orientation/device_data.h" |
| 12 #include "content/common/content_export.h" |
| 13 #include "content/common/device_motion_hardware_buffer.h" |
| 14 |
| 15 template<typename T> struct DefaultSingletonTraits; |
13 | 16 |
14 namespace content { | 17 namespace content { |
15 | |
16 class Orientation; | 18 class Orientation; |
17 | 19 |
18 // Android implementation of DeviceOrientation API. | 20 // Android implementation of DeviceOrientation API. |
19 | 21 |
20 // Android's SensorManager has a push API, whereas Chrome wants to pull data. | 22 // Android's SensorManager has a push API, whereas Chrome wants to pull data. |
21 // To fit them together, we store incoming sensor events in a 1-element buffer. | 23 // To fit them together, we store incoming sensor events in a 1-element buffer. |
22 // SensorManager calls SetOrientation() which pushes a new value (discarding the | 24 // SensorManager calls SetOrientation() which pushes a new value (discarding the |
23 // previous value if any). Chrome calls GetDeviceData() which reads the most | 25 // previous value if any). Chrome calls GetDeviceData() which reads the most |
24 // recent value. Repeated calls to GetDeviceData() will return the same value. | 26 // recent value. Repeated calls to GetDeviceData() will return the same value. |
25 | 27 |
26 class DataFetcherImplAndroid : public DataFetcher { | 28 // TODO(timvolodine): Simplify this class and remove GetDeviceData() method, |
| 29 // once Device Orientation switches to shared memory implementation. |
| 30 // Also rename this class to SensorManagerAndroid. |
| 31 class CONTENT_EXPORT DataFetcherImplAndroid { |
27 public: | 32 public: |
28 // Must be called at startup, before Create(). | 33 // Must be called at startup, before GetInstance(). |
29 static void Init(JNIEnv* env); | 34 static void Init(JNIEnv* env); |
30 | 35 |
31 // Factory function. We'll listen for events for the lifetime of this object. | 36 // Needs to be thread-safe, because accessed from different threads. |
32 // Returns NULL on error. | 37 static DataFetcherImplAndroid* GetInstance(); |
33 static DataFetcher* Create(); | |
34 | |
35 virtual ~DataFetcherImplAndroid(); | |
36 | 38 |
37 // Called from Java via JNI. | 39 // Called from Java via JNI. |
38 void GotOrientation(JNIEnv*, jobject, | 40 void GotOrientation(JNIEnv*, jobject, |
39 double alpha, double beta, double gamma); | 41 double alpha, double beta, double gamma); |
40 void GotAcceleration(JNIEnv*, jobject, | 42 void GotAcceleration(JNIEnv*, jobject, |
41 double x, double y, double z); | 43 double x, double y, double z); |
42 void GotAccelerationIncludingGravity(JNIEnv*, jobject, | 44 void GotAccelerationIncludingGravity(JNIEnv*, jobject, |
43 double x, double y, double z); | 45 double x, double y, double z); |
44 void GotRotationRate(JNIEnv*, jobject, | 46 void GotRotationRate(JNIEnv*, jobject, |
45 double alpha, double beta, double gamma); | 47 double alpha, double beta, double gamma); |
46 | 48 |
47 // Implementation of DataFetcher. | 49 const DeviceData* GetDeviceData(DeviceData::Type type); |
48 virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE; | |
49 | 50 |
50 private: | 51 virtual bool Start(DeviceData::Type event_type); |
| 52 virtual void Stop(DeviceData::Type event_type); |
| 53 |
| 54 // Shared memory related methods. |
| 55 bool StartFetchingDeviceMotionData(DeviceMotionHardwareBuffer* buffer); |
| 56 void StopFetchingDeviceMotionData(); |
| 57 |
| 58 protected: |
51 DataFetcherImplAndroid(); | 59 DataFetcherImplAndroid(); |
52 const Orientation* GetOrientation(); | 60 virtual ~DataFetcherImplAndroid(); |
53 | |
54 // Wrappers for JNI methods. | |
55 // TODO(timvolodine): move the DeviceData::Type enum to the service class | |
56 // once it is implemented. | |
57 bool Start(DeviceData::Type event_type, int rate_in_milliseconds); | |
58 void Stop(DeviceData::Type event_type); | |
59 | 61 |
60 virtual int GetNumberActiveDeviceMotionSensors(); | 62 virtual int GetNumberActiveDeviceMotionSensors(); |
61 | 63 |
| 64 private: |
| 65 friend struct DefaultSingletonTraits<DataFetcherImplAndroid>; |
| 66 |
| 67 const Orientation* GetOrientation(); |
| 68 |
| 69 void CheckBufferReadyToRead(); |
| 70 void SetBufferReadyStatus(bool ready); |
| 71 void ClearInternalBuffers(); |
| 72 |
| 73 enum { |
| 74 RECEIVED_MOTION_DATA_ACCELERATION = 0, |
| 75 RECEIVED_MOTION_DATA_ACCELERATION_INCL_GRAVITY = 1, |
| 76 RECEIVED_MOTION_DATA_ROTATION_RATE = 2, |
| 77 RECEIVED_MOTION_DATA_MAX = 3, |
| 78 }; |
62 // Value returned by GetDeviceData. | 79 // Value returned by GetDeviceData. |
63 scoped_refptr<Orientation> current_orientation_; | 80 scoped_refptr<Orientation> current_orientation_; |
64 | 81 |
65 // 1-element buffer, written by GotOrientation, read by GetDeviceData. | 82 // 1-element buffer, written by GotOrientation, read by GetDeviceData. |
66 base::Lock next_orientation_lock_; | 83 base::Lock next_orientation_lock_; |
67 scoped_refptr<Orientation> next_orientation_; | 84 scoped_refptr<Orientation> next_orientation_; |
68 | 85 |
69 // The Java provider of orientation info. | 86 // The Java provider of orientation info. |
70 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; | 87 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; |
| 88 int number_active_device_motion_sensors_; |
| 89 int received_motion_data_[RECEIVED_MOTION_DATA_MAX]; |
| 90 DeviceMotionHardwareBuffer* device_motion_buffer_; |
| 91 bool is_buffer_ready_; |
71 | 92 |
72 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); | 93 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); |
73 }; | 94 }; |
74 | 95 |
75 } // namespace content | 96 } // namespace content |
76 | 97 |
77 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ | 98 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ |
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