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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 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 | 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 module device.mojom; | 5 module device.mojom; |
6 | 6 |
7 import "sensor.mojom"; | 7 import "sensor.mojom"; |
8 | 8 |
9 struct SensorInitParams { | 9 struct SensorInitParams { |
10 // The shared memory handle used to fetch the sensor reading. | 10 // The shared memory handle used to fetch the sensor reading. |
11 handle<shared_buffer> memory; | 11 handle<shared_buffer> memory; |
12 | 12 |
13 // The offset at which shared buffer must be mapped. | 13 // The offset at which shared buffer must be mapped. |
14 uint64 buffer_offset; | 14 uint64 buffer_offset; |
15 | 15 |
16 // The ReportingMode supported by the sensor. | 16 // The ReportingMode supported by the sensor. |
17 ReportingMode mode; | 17 ReportingMode mode; |
18 | 18 |
19 // Default sensor configuration. | 19 // Default sensor configuration. |
20 SensorConfiguration default_configuration; | 20 SensorConfiguration default_configuration; |
21 | 21 |
22 // Maximum sampling frequency for the sensor: it considers both | 22 // Maximum sampling frequency for the sensor: it considers both |
23 // |SensorConfiguration::kMaxAllowedFrequency| and actual sensor | 23 // |SensorConfiguration::kMaxAllowedFrequency| and actual sensor |
24 // capabilities. | 24 // capabilities. |
25 double maximum_frequency; | 25 double maximum_frequency; |
26 | 26 |
| 27 // Minimum sampling frequency for the sensor. |
| 28 double minimum_frequency; |
| 29 |
27 // Each sensor's read buffer contains 4 tightly packed 64-bit floating | 30 // Each sensor's read buffer contains 4 tightly packed 64-bit floating |
28 // point fields (please see sensor_reading.h) and a seqlock, so its size is | 31 // point fields (please see sensor_reading.h) and a seqlock, so its size is |
29 // 5 * 8 = 40 bytes. | 32 // 5 * 8 = 40 bytes. |
30 const uint64 kReadBufferSizeForTests = 40; | 33 const uint64 kReadBufferSizeForTests = 40; |
31 }; | 34 }; |
32 | 35 |
33 interface SensorProvider { | 36 interface SensorProvider { |
34 // Gets the sensor interface by the given type. | 37 // Gets the sensor interface by the given type. |
35 // | 38 // |
36 // |type| type of the sensor. | 39 // |type| type of the sensor. |
37 // | 40 // |
38 // |sensor_request| the Sensor interface instance to be initialized. | 41 // |sensor_request| the Sensor interface instance to be initialized. |
39 // | 42 // |
40 // |init_params| on success will contain the SensorInitParams describing the | 43 // |init_params| on success will contain the SensorInitParams describing the |
41 // sensor details, | 44 // sensor details, |
42 // contains null on failure. | 45 // contains null on failure. |
43 // |client_request| on success contains a request to be bound by the client, | 46 // |client_request| on success contains a request to be bound by the client, |
44 // contains null on failure. | 47 // contains null on failure. |
45 GetSensor(SensorType type, Sensor& sensor_request) => ( | 48 GetSensor(SensorType type, Sensor& sensor_request) => ( |
46 SensorInitParams? init_params, | 49 SensorInitParams? init_params, |
47 SensorClient&? client_request); | 50 SensorClient&? client_request); |
48 }; | 51 }; |
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