als/AlsSensor.h

/*
* Copyright (C) 2015 Intel Corp
*
* 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_LIGHT_SENSOR_H
#define ANDROID_LIGHT_SENSOR_H

#include <stdint.h>
#include <errno.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include "sensors.h"
#include "SensorBase.h"
#include "InputEventReader.h"

/*****************************************************************************/
/* the GP2A is a binary proximity sensor that triggers around 5 cm on
 * this hardware */
#define PROXIMITY_THRESHOLD_GP2A  5.0f

struct input_event;

class LightSensor : public SensorBase {
    int mEnabled;
    int mEventsSinceEnable;
    InputEventCircularReader mInputReader;
    sensors_event_t mPendingEvent;
    bool mHasPendingEvent;
    char input_sysfs_path[PATH_MAX];
    int input_sysfs_path_len;

    int setInitialState();
    float mPreviousLight;
    float indexToValue(size_t index) const;

public:
            LightSensor();
    virtual ~LightSensor();
    virtual int readEvents(sensors_event_t* data, int count);
    virtual bool hasPendingEvents() const;
    virtual int setDelay(int32_t handle, int64_t ns);
    virtual int enable(int32_t handle, int enabled);
    virtual int isActivated(int handle);
#ifdef HAL_VERSION_GT_1_0
    virtual int batch(int handle, int flags, int64_t period_ns, int64_t timeout);
#endif

};

/*****************************************************************************/

#endif  // ANDROID_LIGHT_SENSOR_H