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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_ISENSOR_HAL_WRAPPER_H
#define ANDROID_ISENSOR_HAL_WRAPPER_H
#include <hardware/sensors.h>
#include <stdint.h>
#include <sys/types.h>
#include "SensorService.h"
namespace android {
/**
* A wrapper for various types of HAL implementation, e.g. to distinguish HIDL and AIDL versions.
*/
class ISensorHalWrapper {
public:
class SensorDeviceCallback {
public:
virtual void onDynamicSensorsConnected(
const std::vector<sensor_t> &dynamicSensorsAdded) = 0;
virtual void onDynamicSensorsDisconnected(
const std::vector<int32_t> &dynamicSensorHandlesRemoved) = 0;
virtual ~SensorDeviceCallback(){};
};
enum HalConnectionStatus {
CONNECTED, // Successfully connected to the HAL
DOES_NOT_EXIST, // Could not find the HAL
FAILED_TO_CONNECT, // Found the HAL but failed to connect/initialize
UNKNOWN,
};
virtual ~ISensorHalWrapper(){};
/**
* Connects to the underlying sensors HAL. This should also be used for any reconnections
* due to HAL resets.
*/
virtual bool connect(SensorDeviceCallback *callback) = 0;
virtual void prepareForReconnect() = 0;
virtual bool supportsPolling() = 0;
virtual bool supportsMessageQueues() = 0;
/**
* Polls for available sensor events. This could be using the traditional sensors
* polling or from a FMQ.
*/
virtual ssize_t poll(sensors_event_t *buffer, size_t count) = 0;
virtual ssize_t pollFmq(sensors_event_t *buffer, size_t maxNumEventsToRead) = 0;
/**
* The below functions directly mirrors the sensors HAL definitions.
*/
virtual std::vector<sensor_t> getSensorsList() = 0;
virtual status_t setOperationMode(SensorService::Mode mode) = 0;
virtual status_t activate(int32_t sensorHandle, bool enabled) = 0;
virtual status_t batch(int32_t sensorHandle, int64_t samplingPeriodNs,
int64_t maxReportLatencyNs) = 0;
virtual status_t flush(int32_t sensorHandle) = 0;
virtual status_t injectSensorData(const sensors_event_t *event) = 0;
virtual status_t registerDirectChannel(const sensors_direct_mem_t *memory,
int32_t *channelHandle) = 0;
virtual status_t unregisterDirectChannel(int32_t channelHandle) = 0;
virtual status_t configureDirectChannel(int32_t sensorHandle, int32_t channelHandle,
const struct sensors_direct_cfg_t *config) = 0;
virtual void writeWakeLockHandled(uint32_t count) = 0;
std::atomic_bool mReconnecting = false;
std::atomic_bool mInHalBypassMode = false;
};
} // namespace android
#endif // ANDROID_ISENSOR_HAL_WRAPPER_H
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