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Side by Side Diff: device/generic_sensor/public/interfaces/sensor_provider.mojom

Issue 2465363004: [Sensors] Consider maximum supported frequency (Closed)
Patch Set: Comments from Alex Created 4 years, 1 month ago
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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
23 // |SensorConfiguration::kMaxAllowedFrequency| and actual sensor
24 // capabilities.
25 double maximum_frequency;
26
22 // Each sensor's read buffer contains 4 tightly packed 64-bit floating 27 // Each sensor's read buffer contains 4 tightly packed 64-bit floating
23 // point fields (please see sensor_reading.h) and a seqlock, so its size is 28 // point fields (please see sensor_reading.h) and a seqlock, so its size is
24 // 5 * 8 = 40 bytes. 29 // 5 * 8 = 40 bytes.
25 const uint64 kReadBufferSizeForTests = 40; 30 const uint64 kReadBufferSizeForTests = 40;
26 }; 31 };
27 32
28 interface SensorProvider { 33 interface SensorProvider {
29 // Gets the sensor interface by the given type. 34 // Gets the sensor interface by the given type.
30 // 35 //
31 // |type| type of the sensor. 36 // |type| type of the sensor.
32 // 37 //
33 // |sensor_request| the Sensor interface instance to be initialized. 38 // |sensor_request| the Sensor interface instance to be initialized.
34 // 39 //
35 // |init_params| on success will contain the SensorInitParams describing the 40 // |init_params| on success will contain the SensorInitParams describing the
36 // sensor details, 41 // sensor details,
37 // contains null on failure. 42 // contains null on failure.
38 // |client_request| on success contains a request to be bound by the client, 43 // |client_request| on success contains a request to be bound by the client,
39 // contains null on failure. 44 // contains null on failure.
40 GetSensor(SensorType type, Sensor& sensor_request) => ( 45 GetSensor(SensorType type, Sensor& sensor_request) => (
41 SensorInitParams? init_params, 46 SensorInitParams? init_params,
42 SensorClient&? client_request); 47 SensorClient&? client_request);
43 }; 48 };
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