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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 <input/DisplayViewport.h>
#include <stdint.h>
#include <ui/Rotation.h>
#include "EventHub.h"
#include "InputListener.h"
#include "InputReaderContext.h"
namespace android {
ui::Rotation getInverseRotation(ui::Rotation orientation);
void rotateDelta(ui::Rotation orientation, float* deltaX, float* deltaY);
// Returns true if the pointer should be reported as being down given the specified
// button states. This determines whether the event is reported as a touch event.
bool isPointerDown(int32_t buttonState);
[[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys(
InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime,
int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags,
int32_t lastButtonState, int32_t currentButtonState);
// For devices connected over Bluetooth, although they may produce events at a consistent rate,
// the events might end up reaching Android in a "batched" manner through the Bluetooth
// stack, where a few events may be clumped together and processed around the same time.
// In this case, if the input device or its driver does not send or process the actual event
// generation timestamps, the event time will set to whenever the kernel received the event.
// When the timestamp deltas are minuscule for these batched events, any changes in x or y
// coordinates result in extremely large instantaneous velocities, which can negatively impact
// user experience. To avoid this, we augment the timestamps so that subsequent event timestamps
// differ by at least a minimum delta value.
std::tuple<nsecs_t /*eventTime*/, nsecs_t /*readTime*/> applyBluetoothTimestampSmoothening(
const InputDeviceIdentifier& identifier, nsecs_t currentEventTime, nsecs_t readTime,
nsecs_t lastEventTime);
} // namespace android
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