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52 lines
1.6 KiB
Plaintext
52 lines
1.6 KiB
Plaintext
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module device.mojom;
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import "sensor.mojom";
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struct SensorInitParams {
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// The shared memory handle used to fetch the sensor reading.
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handle<shared_buffer> memory;
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// The offset at which shared buffer must be mapped.
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uint64 buffer_offset;
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// The ReportingMode supported by the sensor.
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ReportingMode mode;
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// Default sensor configuration.
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SensorConfiguration default_configuration;
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// Maximum sampling frequency for the sensor: it considers both
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// |SensorConfiguration::kMaxAllowedFrequency| and actual sensor
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// capabilities.
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double maximum_frequency;
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// Minimum sampling frequency for the sensor.
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double minimum_frequency;
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// Each sensor's read buffer contains 5 tightly packed 64-bit floating
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// point fields (please see sensor_reading.h) and a seqlock, so its size is
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// 6 * 8 = 48 bytes.
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const uint64 kReadBufferSizeForTests = 48;
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};
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interface SensorProvider {
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// Gets the sensor interface by the given type.
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//
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// |type| type of the sensor.
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//
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// |sensor_request| the Sensor interface instance to be initialized.
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//
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// |init_params| on success will contain the SensorInitParams describing the
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// sensor details,
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// contains null on failure.
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// |client_request| on success contains a request to be bound by the client,
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// contains null on failure.
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GetSensor(SensorType type, Sensor& sensor_request) => (
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SensorInitParams? init_params,
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SensorClient&? client_request);
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};
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