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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.
*/
// clang-format off
#include "../Macros.h"
// clang-format on
#include "RotaryEncoderInputMapper.h"
#include <Counter.h>
#include <com_android_input_flags.h>
#include <utils/Timers.h>
#include <optional>
#include "CursorScrollAccumulator.h"
namespace android {
using android::expresslog::Counter;
constexpr float kDefaultResolution = 0;
constexpr float kDefaultScaleFactor = 1.0f;
constexpr int32_t kDefaultMinRotationsToLog = 3;
RotaryEncoderInputMapper::RotaryEncoderInputMapper(InputDeviceContext& deviceContext,
const InputReaderConfiguration& readerConfig)
: RotaryEncoderInputMapper(deviceContext, readerConfig,
Counter::logIncrement /* telemetryLogCounter */) {}
RotaryEncoderInputMapper::RotaryEncoderInputMapper(
InputDeviceContext& deviceContext, const InputReaderConfiguration& readerConfig,
std::function<void(const char*, int64_t)> telemetryLogCounter)
: InputMapper(deviceContext, readerConfig),
mSource(AINPUT_SOURCE_ROTARY_ENCODER),
mScalingFactor(kDefaultScaleFactor),
mResolution(kDefaultResolution),
mOrientation(ui::ROTATION_0),
mTelemetryLogCounter(telemetryLogCounter) {}
RotaryEncoderInputMapper::~RotaryEncoderInputMapper() {}
uint32_t RotaryEncoderInputMapper::getSources() const {
return mSource;
}
void RotaryEncoderInputMapper::populateDeviceInfo(InputDeviceInfo& info) {
InputMapper::populateDeviceInfo(info);
if (mRotaryEncoderScrollAccumulator.haveRelativeVWheel()) {
const PropertyMap& config = getDeviceContext().getConfiguration();
std::optional<float> res = config.getFloat("device.res");
if (!res.has_value()) {
ALOGW("Rotary Encoder device configuration file didn't specify resolution!\n");
}
mResolution = res.value_or(kDefaultResolution);
std::optional<float> scalingFactor = config.getFloat("device.scalingFactor");
if (!scalingFactor.has_value()) {
ALOGW("Rotary Encoder device configuration file didn't specify scaling factor,"
"default to %f!\n",
kDefaultScaleFactor);
}
mScalingFactor = scalingFactor.value_or(kDefaultScaleFactor);
info.addMotionRange(AMOTION_EVENT_AXIS_SCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
mResolution * mScalingFactor);
if (com::android::input::flags::rotary_input_telemetry()) {
mMinRotationsToLog = config.getInt("rotary_encoder.min_rotations_to_log");
if (!mMinRotationsToLog.has_value()) {
ALOGI("Rotary Encoder device configuration file didn't specify min log rotation.");
} else if (*mMinRotationsToLog <= 0) {
ALOGE("Rotary Encoder device configuration specified non-positive min log rotation "
": %d. Telemetry logging of rotations disabled.",
*mMinRotationsToLog);
mMinRotationsToLog = {};
} else {
ALOGD("Rotary Encoder telemetry enabled. mMinRotationsToLog=%d",
*mMinRotationsToLog);
}
}
}
}
void RotaryEncoderInputMapper::dump(std::string& dump) {
dump += INDENT2 "Rotary Encoder Input Mapper:\n";
dump += StringPrintf(INDENT3 "HaveWheel: %s\n",
toString(mRotaryEncoderScrollAccumulator.haveRelativeVWheel()));
dump += StringPrintf(INDENT3 "HaveSlopController: %s\n", toString(mSlopController != nullptr));
}
std::list<NotifyArgs> RotaryEncoderInputMapper::reconfigure(nsecs_t when,
const InputReaderConfiguration& config,
ConfigurationChanges changes) {
std::list<NotifyArgs> out = InputMapper::reconfigure(when, config, changes);
if (!changes.any()) {
mRotaryEncoderScrollAccumulator.configure(getDeviceContext());
const PropertyMap& propertyMap = getDeviceContext().getConfiguration();
float slopThreshold = propertyMap.getInt("rotary_encoder.slop_threshold").value_or(0);
int32_t slopDurationNs = milliseconds_to_nanoseconds(
propertyMap.getInt("rotary_encoder.slop_duration_ms").value_or(0));
if (slopThreshold > 0 && slopDurationNs > 0) {
mSlopController = std::make_unique<SlopController>(slopThreshold, slopDurationNs);
} else {
mSlopController = nullptr;
}
}
if (!changes.any() || changes.test(InputReaderConfiguration::Change::DISPLAY_INFO)) {
if (getDeviceContext().getAssociatedViewport()) {
mDisplayId = getDeviceContext().getAssociatedViewport()->displayId;
mOrientation = getDeviceContext().getAssociatedViewport()->orientation;
} else {
mDisplayId = ui::LogicalDisplayId::INVALID;
std::optional<DisplayViewport> internalViewport =
config.getDisplayViewportByType(ViewportType::INTERNAL);
if (internalViewport) {
mOrientation = internalViewport->orientation;
} else {
mOrientation = ui::ROTATION_0;
}
}
}
return out;
}
std::list<NotifyArgs> RotaryEncoderInputMapper::reset(nsecs_t when) {
mRotaryEncoderScrollAccumulator.reset(getDeviceContext());
return InputMapper::reset(when);
}
std::list<NotifyArgs> RotaryEncoderInputMapper::process(const RawEvent& rawEvent) {
std::list<NotifyArgs> out;
mRotaryEncoderScrollAccumulator.process(rawEvent);
if (rawEvent.type == EV_SYN && rawEvent.code == SYN_REPORT) {
out += sync(rawEvent.when, rawEvent.readTime);
}
return out;
}
void RotaryEncoderInputMapper::logScroll(float scroll) {
if (mResolution <= 0 || !mMinRotationsToLog) return;
mUnloggedScrolls += fabs(scroll);
// unitsPerRotation = (2 * PI * radians) * (units per radian (i.e. resolution))
const float unitsPerRotation = 2 * M_PI * mResolution;
const float scrollsPerMinRotationsToLog = *mMinRotationsToLog * unitsPerRotation;
const int32_t numMinRotationsToLog =
static_cast<int32_t>(mUnloggedScrolls / scrollsPerMinRotationsToLog);
mUnloggedScrolls = std::fmod(mUnloggedScrolls, scrollsPerMinRotationsToLog);
if (numMinRotationsToLog) {
mTelemetryLogCounter("input.value_rotary_input_device_full_rotation_count",
numMinRotationsToLog * (*mMinRotationsToLog));
}
}
std::list<NotifyArgs> RotaryEncoderInputMapper::sync(nsecs_t when, nsecs_t readTime) {
std::list<NotifyArgs> out;
float scroll = mRotaryEncoderScrollAccumulator.getRelativeVWheel();
logScroll(scroll);
if (mSlopController) {
scroll = mSlopController->consumeEvent(when, scroll);
}
bool scrolled = scroll != 0;
// Send motion event.
if (scrolled) {
int32_t metaState = getContext()->getGlobalMetaState();
if (mOrientation == ui::ROTATION_180) {
scroll = -scroll;
}
PointerCoords pointerCoords;
pointerCoords.clear();
pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_SCROLL, scroll * mScalingFactor);
PointerProperties pointerProperties;
pointerProperties.clear();
pointerProperties.id = 0;
pointerProperties.toolType = ToolType::UNKNOWN;
uint32_t policyFlags = 0;
if (getDeviceContext().isExternal()) {
policyFlags |= POLICY_FLAG_WAKE;
}
out.push_back(
NotifyMotionArgs(getContext()->getNextId(), when, readTime, getDeviceId(), mSource,
mDisplayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0, 0,
metaState, /*buttonState=*/0, MotionClassification::NONE,
AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
&pointerCoords, 0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
AMOTION_EVENT_INVALID_CURSOR_POSITION, 0, /*videoFrames=*/{}));
}
mRotaryEncoderScrollAccumulator.finishSync();
return out;
}
} // namespace android
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