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/*
* 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.
*/
#pragma once
#include "InputMapper.h"
namespace android {
class JoystickInputMapper : public InputMapper {
public:
template <class T, class... Args>
friend std::unique_ptr<T> createInputMapper(InputDeviceContext& deviceContext,
const InputReaderConfiguration& readerConfig,
Args... args);
virtual ~JoystickInputMapper();
virtual uint32_t getSources() const override;
virtual void populateDeviceInfo(InputDeviceInfo& deviceInfo) override;
virtual void dump(std::string& dump) override;
[[nodiscard]] std::list<NotifyArgs> reconfigure(nsecs_t when,
const InputReaderConfiguration& config,
ConfigurationChanges changes) override;
[[nodiscard]] std::list<NotifyArgs> reset(nsecs_t when) override;
[[nodiscard]] std::list<NotifyArgs> process(const RawEvent* rawEvent) override;
private:
struct Axis {
explicit Axis(const RawAbsoluteAxisInfo& rawAxisInfo, const AxisInfo& axisInfo,
bool explicitlyMapped, float scale, float offset, float highScale,
float highOffset, float min, float max, float flat, float fuzz,
float resolution, float filter)
: rawAxisInfo(rawAxisInfo),
axisInfo(axisInfo),
explicitlyMapped(explicitlyMapped),
scale(scale),
offset(offset),
highScale(highScale),
highOffset(highOffset),
min(min),
max(max),
flat(flat),
fuzz(fuzz),
resolution(resolution),
filter(filter) {
resetValue();
}
RawAbsoluteAxisInfo rawAxisInfo;
AxisInfo axisInfo;
bool explicitlyMapped; // true if the axis was explicitly assigned an axis id
float scale; // scale factor from raw to normalized values
float offset; // offset to add after scaling for normalization
float highScale; // scale factor from raw to normalized values of high split
float highOffset; // offset to add after scaling for normalization of high split
float min; // normalized inclusive minimum
float max; // normalized inclusive maximum
float flat; // normalized flat region size
float fuzz; // normalized error tolerance
float resolution; // normalized resolution in units/mm
float filter; // filter out small variations of this size
float currentValue; // current value
float newValue; // most recent value
float highCurrentValue; // current value of high split
float highNewValue; // most recent value of high split
void resetValue() {
this->currentValue = 0;
this->newValue = 0;
this->highCurrentValue = 0;
this->highNewValue = 0;
}
};
explicit JoystickInputMapper(InputDeviceContext& deviceContext,
const InputReaderConfiguration& readerConfig);
static Axis createAxis(const AxisInfo& AxisInfo, const RawAbsoluteAxisInfo& rawAxisInfo,
bool explicitlyMapped);
// Axes indexed by raw ABS_* axis index.
std::unordered_map<int32_t, Axis> mAxes;
[[nodiscard]] std::list<NotifyArgs> sync(nsecs_t when, nsecs_t readTime, bool force);
bool haveAxis(int32_t axisId);
void pruneAxes(bool ignoreExplicitlyMappedAxes);
bool filterAxes(bool force);
static bool hasValueChangedSignificantly(float filter, float newValue, float currentValue,
float min, float max);
static bool hasMovedNearerToValueWithinFilteredRange(float filter, float newValue,
float currentValue, float thresholdValue);
static bool isCenteredAxis(int32_t axis);
static int32_t getCompatAxis(int32_t axis);
static void addMotionRange(int32_t axisId, const Axis& axis, InputDeviceInfo& info);
static void setPointerCoordsAxisValue(PointerCoords* pointerCoords, int32_t axis, float value);
};
} // namespace android
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