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115 lines
4.5 KiB
115 lines
4.5 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _UI_INPUTREADER_JOYSTICK_INPUT_MAPPER_H
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#define _UI_INPUTREADER_JOYSTICK_INPUT_MAPPER_H
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#include "InputMapper.h"
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namespace android {
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class JoystickInputMapper : public InputMapper {
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public:
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explicit JoystickInputMapper(InputDeviceContext& deviceContext);
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virtual ~JoystickInputMapper();
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virtual uint32_t getSources() override;
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virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo) override;
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virtual void dump(std::string& dump) override;
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virtual void configure(nsecs_t when, const InputReaderConfiguration* config,
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uint32_t changes) override;
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virtual void reset(nsecs_t when) override;
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virtual void process(const RawEvent* rawEvent) override;
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private:
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struct Axis {
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explicit Axis(const RawAbsoluteAxisInfo& rawAxisInfo, const AxisInfo& axisInfo,
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bool explicitlyMapped, float scale, float offset, float highScale,
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float highOffset, float min, float max, float flat, float fuzz,
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float resolution, float filter)
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: rawAxisInfo(rawAxisInfo),
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axisInfo(axisInfo),
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explicitlyMapped(explicitlyMapped),
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scale(scale),
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offset(offset),
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highScale(highScale),
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highOffset(highOffset),
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min(min),
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max(max),
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flat(flat),
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fuzz(fuzz),
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resolution(resolution),
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filter(filter) {
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resetValue();
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}
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RawAbsoluteAxisInfo rawAxisInfo;
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AxisInfo axisInfo;
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bool explicitlyMapped; // true if the axis was explicitly assigned an axis id
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float scale; // scale factor from raw to normalized values
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float offset; // offset to add after scaling for normalization
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float highScale; // scale factor from raw to normalized values of high split
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float highOffset; // offset to add after scaling for normalization of high split
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float min; // normalized inclusive minimum
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float max; // normalized inclusive maximum
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float flat; // normalized flat region size
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float fuzz; // normalized error tolerance
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float resolution; // normalized resolution in units/mm
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float filter; // filter out small variations of this size
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float currentValue; // current value
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float newValue; // most recent value
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float highCurrentValue; // current value of high split
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float highNewValue; // most recent value of high split
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void resetValue() {
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this->currentValue = 0;
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this->newValue = 0;
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this->highCurrentValue = 0;
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this->highNewValue = 0;
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}
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};
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static Axis createAxis(const AxisInfo& AxisInfo, const RawAbsoluteAxisInfo& rawAxisInfo,
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bool explicitlyMapped);
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// Axes indexed by raw ABS_* axis index.
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std::unordered_map<int32_t, Axis> mAxes;
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void sync(nsecs_t when, nsecs_t readTime, bool force);
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bool haveAxis(int32_t axisId);
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void pruneAxes(bool ignoreExplicitlyMappedAxes);
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bool filterAxes(bool force);
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static bool hasValueChangedSignificantly(float filter, float newValue, float currentValue,
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float min, float max);
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static bool hasMovedNearerToValueWithinFilteredRange(float filter, float newValue,
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float currentValue, float thresholdValue);
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static bool isCenteredAxis(int32_t axis);
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static int32_t getCompatAxis(int32_t axis);
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static void addMotionRange(int32_t axisId, const Axis& axis, InputDeviceInfo* info);
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static void setPointerCoordsAxisValue(PointerCoords* pointerCoords, int32_t axis, float value);
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};
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} // namespace android
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#endif // _UI_INPUTREADER_JOYSTICK_INPUT_MAPPER_H
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