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/*
* Copyright (C) 2020 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 _VIBRATION_ELEMENT_H
#define _VIBRATION_ELEMENT_H
#include <array>
#include <chrono>
#include <cstdint>
#include <string>
#include <vector>
namespace android {
// evdev FF_RUMBLE effect only supports two channels of vibration.
constexpr size_t CHANNEL_SIZE = 2;
/*
* Describes a rumble effect
*/
struct VibrationElement {
std::chrono::milliseconds duration;
// Channel amplitude range 0-255.
std::vector<std::pair<int32_t /*vibratorId*/, uint8_t /*amplitude*/>> channels;
explicit VibrationElement(size_t channelNum);
VibrationElement(const VibrationElement& other);
bool operator==(const VibrationElement& other) const;
bool operator!=(const VibrationElement& other) const;
void addChannel(int32_t vibratorId, uint8_t amplitude);
const std::string toString() const;
uint16_t getMagnitude(int32_t vibratorId) const;
bool isOn() const;
};
/*
* Describes a sequence of rumble effect
*/
struct VibrationSequence {
// Pattern of vibration elements
std::vector<VibrationElement> pattern;
explicit VibrationSequence(size_t length);
void operator=(const VibrationSequence& other);
bool operator==(const VibrationSequence& other) const;
void addElement(VibrationElement element);
const std::string toString() const;
};
} // namespace android
#endif // _VIBRATION_ELEMENT_H
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