| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| module device.mojom; |
| |
| import "sensor.mojom"; |
| |
| struct SensorInitParams { |
| // The shared memory handle used to fetch the sensor reading. |
| handle<shared_buffer> memory; |
| |
| // The offset at which shared buffer must be mapped. |
| uint64 buffer_offset; |
| |
| // The ReportingMode supported by the sensor. |
| ReportingMode mode; |
| |
| // Default sensor configuration. |
| SensorConfiguration default_configuration; |
| |
| // Each sensor's read buffer contains 4 tightly packed 64-bit floating |
| // point fields (please see sensor_reading.h) and a seqlock, so its size is |
| // 5 * 8 = 40 bytes. |
| const uint64 kReadBufferSizeForTests = 40; |
| }; |
| |
| interface SensorProvider { |
| // Gets the sensor interface by the given type. |
| // |
| // |type| type of the sensor. |
| // |
| // |sensor_request| the Sensor interface instance to be initialized. |
| // |
| // |init_params| on success will contain the SensorInitParams describing the |
| // sensor details, |
| // contains null on failure. |
| // |client_request| on success contains a request to be bound by the client, |
| // contains null on failure. |
| GetSensor(SensorType type, Sensor& sensor_request) => ( |
| SensorInitParams? init_params, |
| SensorClient&? client_request); |
| }; |