chromium/services/device/generic_sensor/platform_sensor_fusion.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_FUSION_H_
#define SERVICES_DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_FUSION_H_

#include <memory>
#include <vector>

#include "base/containers/flat_map.h"
#include "base/gtest_prod_util.h"
#include "base/memory/weak_ptr.h"
#include "services/device/generic_sensor/platform_sensor.h"
#include "services/device/generic_sensor/platform_sensor_provider.h"

namespace device {

class PlatformSensorFusionAlgorithm;

// Implementation of a platform sensor using sensor fusion. There will be a
// instance of this fusion sensor per browser process which is created by
// the PlatformSensorProvider. If there are no clients, this instance is not
// created.
//
// This class implements the generic concept of sensor fusion. It implements
// a new sensor using data from one or more existing sensors. For example,
// it can implement a *_EULER_ANGLES orientation sensor using a
// *_QUATERNION orientation sensor, or vice-versa.
//
// It can also implement an orientation sensor using an ACCELEROMETER, etc.
class PlatformSensorFusion : public PlatformSensor,
                             public PlatformSensor::Client { … };

}  // namespace device

#endif  // SERVICES_DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_FUSION_H_