services/inputflinger/reader/mapper/RotaryEncoderInputMapper.h

/*
 * Copyright (C) 2019 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 _UI_INPUTREADER_ROTARY_ENCODER_INPUT_MAPPER_H
#define _UI_INPUTREADER_ROTARY_ENCODER_INPUT_MAPPER_H

#include "CursorScrollAccumulator.h"
#include "InputMapper.h"

namespace android {

class RotaryEncoderInputMapper : public InputMapper {
public:
    explicit RotaryEncoderInputMapper(InputDeviceContext& deviceContext);
    virtual ~RotaryEncoderInputMapper();

    virtual uint32_t getSources() const override;
    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo) override;
    virtual void dump(std::string& dump) override;
    virtual void configure(nsecs_t when, const InputReaderConfiguration* config,
                           uint32_t changes) override;
    virtual void reset(nsecs_t when) override;
    virtual void process(const RawEvent* rawEvent) override;

private:
    CursorScrollAccumulator mRotaryEncoderScrollAccumulator;

    int32_t mSource;
    float mScalingFactor;
    int32_t mOrientation;

    void sync(nsecs_t when, nsecs_t readTime);
};

} // namespace android

#endif // _UI_INPUTREADER_ROTARY_ENCODER_INPUT_MAPPER_H