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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" | 11 #include "content/browser/device_orientation/data_fetcher.h" |
12 #include "content/browser/device_orientation/device_data.h" | 12 #include "content/browser/device_orientation/device_data.h" |
13 #include "content/common/device_motion_hardware_buffer.h" | |
14 | |
15 template<typename T> struct DefaultSingletonTraits; | |
bulach
2013/07/10 16:59:41
nit: LeakySingletonTraits
timvolodine
2013/07/11 14:31:34
apparently this needs to be 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 |
28 // TODO(timvolodine): Move this class implementation to | |
29 // data_fetcher_shared_memory_android.cc, once Device Orientation switches to | |
30 // shared memory implementation. | |
26 class DataFetcherImplAndroid : public DataFetcher { | 31 class DataFetcherImplAndroid : public DataFetcher { |
27 public: | 32 public: |
28 // Must be called at startup, before Create(). | 33 // Must be called at startup, before Create(). |
29 static void Init(JNIEnv* env); | 34 static void Register(JNIEnv* env); |
30 | 35 |
31 // Factory function. We'll listen for events for the lifetime of this object. | 36 // Factory function. We'll listen for events for the lifetime of this object. |
32 // Returns NULL on error. | 37 // Returns NULL on error. |
33 static DataFetcher* Create(); | 38 static DataFetcher* Create(); |
34 | 39 |
35 virtual ~DataFetcherImplAndroid(); | 40 // Needs to be thread-safe, because accessed from a thread in provider_impl.cc |
bulach
2013/07/10 16:59:41
nit: s/a thread/different threads/
timvolodine
2013/07/11 14:31:34
Done.
| |
41 // and device_motion_provider.cc. | |
42 static DataFetcherImplAndroid* GetInstance(); | |
36 | 43 |
37 // Called from Java via JNI. | 44 // Called from Java via JNI. |
38 void GotOrientation(JNIEnv*, jobject, | 45 void GotOrientation(JNIEnv*, jobject, |
39 double alpha, double beta, double gamma); | 46 double alpha, double beta, double gamma); |
40 void GotAcceleration(JNIEnv*, jobject, | 47 void GotAcceleration(JNIEnv*, jobject, |
41 double x, double y, double z); | 48 double x, double y, double z); |
42 void GotAccelerationIncludingGravity(JNIEnv*, jobject, | 49 void GotAccelerationIncludingGravity(JNIEnv*, jobject, |
43 double x, double y, double z); | 50 double x, double y, double z); |
44 void GotRotationRate(JNIEnv*, jobject, | 51 void GotRotationRate(JNIEnv*, jobject, |
45 double alpha, double beta, double gamma); | 52 double alpha, double beta, double gamma); |
46 | 53 |
47 // Implementation of DataFetcher. | 54 // Implementation of DataFetcher. |
48 virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE; | 55 virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE; |
49 | 56 |
50 private: | |
51 DataFetcherImplAndroid(); | |
52 const Orientation* GetOrientation(); | |
53 | |
54 // Wrappers for JNI methods. | 57 // Wrappers for JNI methods. |
55 // TODO(timvolodine): move the DeviceData::Type enum to the service class | 58 // TODO(timvolodine): move the DeviceData::Type enum to the service class |
56 // once it is implemented. | 59 // once it is implemented. |
57 bool Start(DeviceData::Type event_type, int rate_in_milliseconds); | 60 virtual bool Start(DeviceData::Type event_type, int rate_in_milliseconds); |
58 void Stop(DeviceData::Type event_type); | 61 virtual void Stop(DeviceData::Type event_type); |
62 | |
63 // Shared memory related methods. | |
64 virtual bool NeedsPolling(); | |
65 virtual bool FetchDeviceMotionDataIntoBuffer(); | |
66 virtual bool StartFetchingDeviceMotionData( | |
67 DeviceMotionHardwareBuffer* buffer); | |
68 virtual void StopFetchingDeviceMotionData(); | |
69 | |
70 protected: | |
71 DataFetcherImplAndroid(); | |
72 virtual ~DataFetcherImplAndroid(); | |
73 | |
74 const Orientation* GetOrientation(); | |
59 | 75 |
60 virtual int GetNumberActiveDeviceMotionSensors(); | 76 virtual int GetNumberActiveDeviceMotionSensors(); |
77 void CheckBufferReadyToRead(); | |
78 void SetBufferReadyStatus(bool ready); | |
79 void ClearInternalBuffers(); | |
61 | 80 |
81 private: | |
82 friend struct DefaultSingletonTraits<DataFetcherImplAndroid>; | |
83 | |
84 enum { | |
85 RECEIVED_MOTION_DATA_ACCELERATION = 0, | |
86 RECEIVED_MOTION_DATA_ACCELERATION_INCL_GRAVITY = 1, | |
87 RECEIVED_MOTION_DATA_ROTATION_RATE = 2, | |
88 RECEIVED_MOTION_DATA_MAX = 3, | |
89 }; | |
62 // Value returned by GetDeviceData. | 90 // Value returned by GetDeviceData. |
63 scoped_refptr<Orientation> current_orientation_; | 91 scoped_refptr<Orientation> current_orientation_; |
64 | 92 |
65 // 1-element buffer, written by GotOrientation, read by GetDeviceData. | 93 // 1-element buffer, written by GotOrientation, read by GetDeviceData. |
66 base::Lock next_orientation_lock_; | 94 base::Lock next_orientation_lock_; |
67 scoped_refptr<Orientation> next_orientation_; | 95 scoped_refptr<Orientation> next_orientation_; |
68 | 96 |
69 // The Java provider of orientation info. | 97 // The Java provider of orientation info. |
70 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; | 98 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; |
99 int number_active_device_motion_sensors_; | |
100 int received_motion_data_[RECEIVED_MOTION_DATA_MAX]; | |
101 DeviceMotionHardwareBuffer* device_motion_buffer_; | |
102 bool is_buffer_ready_; | |
71 | 103 |
72 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); | 104 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); |
73 }; | 105 }; |
74 | 106 |
75 } // namespace content | 107 } // namespace content |
76 | 108 |
77 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ | 109 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ |
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