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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" | |
13 | 14 |
14 namespace content { | 15 namespace content { |
15 | |
16 class Orientation; | 16 class Orientation; |
17 | 17 |
18 // Android implementation of DeviceOrientation API. | 18 // Android implementation of DeviceOrientation API. |
19 | 19 |
20 // Android's SensorManager has a push API, whereas Chrome wants to pull data. | 20 // 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. | 21 // 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 | 22 // SensorManager calls SetOrientation() which pushes a new value (discarding the |
23 // previous value if any). Chrome calls GetDeviceData() which reads the most | 23 // previous value if any). Chrome calls GetDeviceData() which reads the most |
24 // recent value. Repeated calls to GetDeviceData() will return the same value. | 24 // recent value. Repeated calls to GetDeviceData() will return the same value. |
25 | 25 |
26 // TODO(timvolodine): Move this class implementation to | |
27 // data_fetcher_shared_memory_android.cc, once Device Orientation switches to | |
28 // shared memory implementation. | |
26 class DataFetcherImplAndroid : public DataFetcher { | 29 class DataFetcherImplAndroid : public DataFetcher { |
27 public: | 30 public: |
28 // Must be called at startup, before Create(). | 31 // Must be called at startup, before Create(). |
29 static void Init(JNIEnv* env); | 32 static void Register(JNIEnv* env); |
33 | |
34 static DataFetcherImplAndroid* instance(); | |
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 virtual ~DataFetcherImplAndroid(); |
36 | 41 |
37 // Called from Java via JNI. | 42 // Called from Java via JNI. |
38 void GotOrientation(JNIEnv*, jobject, | 43 void GotOrientation(JNIEnv*, jobject, |
39 double alpha, double beta, double gamma); | 44 double alpha, double beta, double gamma); |
40 void GotAcceleration(JNIEnv*, jobject, | 45 void GotAcceleration(JNIEnv*, jobject, |
41 double x, double y, double z); | 46 double x, double y, double z); |
42 void GotAccelerationIncludingGravity(JNIEnv*, jobject, | 47 void GotAccelerationIncludingGravity(JNIEnv*, jobject, |
43 double x, double y, double z); | 48 double x, double y, double z); |
44 void GotRotationRate(JNIEnv*, jobject, | 49 void GotRotationRate(JNIEnv*, jobject, |
45 double alpha, double beta, double gamma); | 50 double alpha, double beta, double gamma); |
46 | 51 |
47 // Implementation of DataFetcher. | 52 // Implementation of DataFetcher. |
48 virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE; | 53 virtual const DeviceData* GetDeviceData(DeviceData::Type type) OVERRIDE; |
49 | 54 |
50 private: | 55 // Implementation of the new API using shared memory. |
bulach
2013/07/09 09:03:29
nit: just the name the base class, "new" will get
timvolodine
2013/07/09 18:59:56
Done.
| |
56 | |
57 virtual bool NeedsPolling() { return false; } | |
bulach
2013/07/09 09:03:29
nit: better move the implementation to the .cc fil
timvolodine
2013/07/09 18:59:56
Done.
| |
58 virtual bool FetchDeviceMotionDataIntoBuffer(); | |
59 virtual bool StartFetchingDeviceMotionData( | |
60 DeviceMotionHardwareBuffer* buffer); | |
61 virtual void StopFetchingDeviceMotionData(); | |
62 | |
63 protected: | |
51 DataFetcherImplAndroid(); | 64 DataFetcherImplAndroid(); |
52 const Orientation* GetOrientation(); | 65 const Orientation* GetOrientation(); |
53 | 66 |
54 // Wrappers for JNI methods. | 67 // Wrappers for JNI methods. |
55 // TODO(timvolodine): move the DeviceData::Type enum to the service class | 68 // TODO(timvolodine): move the DeviceData::Type enum to the service class |
56 // once it is implemented. | 69 // once it is implemented. |
57 bool Start(DeviceData::Type event_type, int rate_in_milliseconds); | 70 virtual bool Start(DeviceData::Type event_type, int rate_in_milliseconds); |
58 void Stop(DeviceData::Type event_type); | 71 virtual void Stop(DeviceData::Type event_type); |
59 | 72 |
60 virtual int GetNumberActiveDeviceMotionSensors(); | 73 virtual int GetNumberActiveDeviceMotionSensors(); |
74 void CheckBufferReadyToRead(); | |
75 void SetBufferReadyStatus(bool ready); | |
61 | 76 |
77 private: | |
78 enum { | |
79 DATA_ACCELERATION = 0, | |
bulach
2013/07/09 09:03:29
nit: I guess this would be clearer as RECEIVED_MOT
timvolodine
2013/07/09 18:59:56
Done.
| |
80 DATA_ACCELERATION_INCLUDING_GRAVITY = 1, | |
81 DATA_ROTATION_RATE = 2, | |
82 DATA_MAX = 3, | |
83 }; | |
62 // Value returned by GetDeviceData. | 84 // Value returned by GetDeviceData. |
63 scoped_refptr<Orientation> current_orientation_; | 85 scoped_refptr<Orientation> current_orientation_; |
64 | 86 |
65 // 1-element buffer, written by GotOrientation, read by GetDeviceData. | 87 // 1-element buffer, written by GotOrientation, read by GetDeviceData. |
66 base::Lock next_orientation_lock_; | 88 base::Lock next_orientation_lock_; |
67 scoped_refptr<Orientation> next_orientation_; | 89 scoped_refptr<Orientation> next_orientation_; |
68 | 90 |
69 // The Java provider of orientation info. | 91 // The Java provider of orientation info. |
70 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; | 92 base::android::ScopedJavaGlobalRef<jobject> device_orientation_; |
93 int number_active_device_motion_sensors_; | |
94 int received_motion_data_[DATA_MAX]; | |
95 DeviceMotionHardwareBuffer* device_motion_buffer_; | |
96 bool is_buffer_ready_; | |
71 | 97 |
72 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); | 98 DISALLOW_COPY_AND_ASSIGN(DataFetcherImplAndroid); |
73 }; | 99 }; |
74 | 100 |
75 } // namespace content | 101 } // namespace content |
76 | 102 |
77 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ | 103 #endif // CHROME_BROWSER_DEVICE_ORIENTATION_DATA_FETCHER_IMPL_ANDROID_H_ |
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