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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <functional>
#include <memory>
#include <string>
#include <tuple>
#include <unordered_map>
#include <utility>
#include "common/logging/log.h"
#include "common/param_package.h"
#include "common/quaternion.h"
#include "common/vector_math.h"
namespace Input {
enum class AnalogDirection : u8 {
RIGHT,
LEFT,
UP,
DOWN,
};
struct AnalogProperties {
float deadzone;
float range;
float threshold;
};
template <typename StatusType>
struct InputCallback {
std::function<void(StatusType)> on_change;
};
/// An abstract class template for an input device (a button, an analog input, etc.).
template <typename StatusType>
class InputDevice {
public:
virtual ~InputDevice() = default;
virtual StatusType GetStatus() const {
return {};
}
virtual StatusType GetRawStatus() const {
return GetStatus();
}
virtual AnalogProperties GetAnalogProperties() const {
return {};
}
virtual bool GetAnalogDirectionStatus([[maybe_unused]] AnalogDirection direction) const {
return {};
}
virtual bool SetRumblePlay([[maybe_unused]] f32 amp_low, [[maybe_unused]] f32 freq_low,
[[maybe_unused]] f32 amp_high,
[[maybe_unused]] f32 freq_high) const {
return {};
}
void SetCallback(InputCallback<StatusType> callback_) {
callback = std::move(callback_);
}
void TriggerOnChange() {
if (callback.on_change) {
callback.on_change(GetStatus());
}
}
private:
InputCallback<StatusType> callback;
};
/// An abstract class template for a factory that can create input devices.
template <typename InputDeviceType>
class Factory {
public:
virtual ~Factory() = default;
virtual std::unique_ptr<InputDeviceType> Create(const Common::ParamPackage&) = 0;
};
namespace Impl {
template <typename InputDeviceType>
using FactoryListType = std::unordered_map<std::string, std::shared_ptr<Factory<InputDeviceType>>>;
template <typename InputDeviceType>
struct FactoryList {
static FactoryListType<InputDeviceType> list;
};
template <typename InputDeviceType>
FactoryListType<InputDeviceType> FactoryList<InputDeviceType>::list;
} // namespace Impl
/**
* Registers an input device factory.
* @tparam InputDeviceType the type of input devices the factory can create
* @param name the name of the factory. Will be used to match the "engine" parameter when creating
* a device
* @param factory the factory object to register
*/
template <typename InputDeviceType>
void RegisterFactory(const std::string& name, std::shared_ptr<Factory<InputDeviceType>> factory) {
auto pair = std::make_pair(name, std::move(factory));
if (!Impl::FactoryList<InputDeviceType>::list.insert(std::move(pair)).second) {
LOG_ERROR(Input, "Factory '{}' already registered", name);
}
}
/**
* Unregisters an input device factory.
* @tparam InputDeviceType the type of input devices the factory can create
* @param name the name of the factory to unregister
*/
template <typename InputDeviceType>
void UnregisterFactory(const std::string& name) {
if (Impl::FactoryList<InputDeviceType>::list.erase(name) == 0) {
LOG_ERROR(Input, "Factory '{}' not registered", name);
}
}
/**
* Create an input device from given paramters.
* @tparam InputDeviceType the type of input devices to create
* @param params a serialized ParamPackage string contains all parameters for creating the device
*/
template <typename InputDeviceType>
std::unique_ptr<InputDeviceType> CreateDevice(const std::string& params) {
const Common::ParamPackage package(params);
const std::string engine = package.Get("engine", "null");
const auto& factory_list = Impl::FactoryList<InputDeviceType>::list;
const auto pair = factory_list.find(engine);
if (pair == factory_list.end()) {
if (engine != "null") {
LOG_ERROR(Input, "Unknown engine name: {}", engine);
}
return std::make_unique<InputDeviceType>();
}
return pair->second->Create(package);
}
/**
* A button device is an input device that returns bool as status.
* true for pressed; false for released.
*/
using ButtonDevice = InputDevice<bool>;
/**
* An analog device is an input device that returns a tuple of x and y coordinates as status. The
* coordinates are within the unit circle. x+ is defined as right direction, and y+ is defined as up
* direction
*/
using AnalogDevice = InputDevice<std::tuple<float, float>>;
/**
* A vibration device is an input device that returns an unsigned byte as status.
* It represents whether the vibration device supports vibration or not.
* If the status returns 1, it supports vibration. Otherwise, it does not support vibration.
*/
using VibrationDevice = InputDevice<u8>;
/**
* A motion status is an object that returns a tuple of accelerometer state vector,
* gyroscope state vector, rotation state vector, orientation state matrix and quaterion state
* vector.
*
* For both 3D vectors:
* x+ is the same direction as RIGHT on D-pad.
* y+ is normal to the touch screen, pointing outward.
* z+ is the same direction as UP on D-pad.
*
* For accelerometer state vector
* Units: g (gravitational acceleration)
*
* For gyroscope state vector:
* Orientation is determined by right-hand rule.
* Units: deg/sec
*
* For rotation state vector
* Units: rotations
*
* For orientation state matrix
* x vector
* y vector
* z vector
*
* For quaternion state vector
* xyz vector
* w float
*/
using MotionStatus = std::tuple<Common::Vec3<float>, Common::Vec3<float>, Common::Vec3<float>,
std::array<Common::Vec3f, 3>, Common::Quaternion<f32>>;
/**
* A motion device is an input device that returns a motion status object
*/
using MotionDevice = InputDevice<MotionStatus>;
/**
* A touch status is an object that returns an array of 16 tuple elements of two floats and a bool.
* The floats are x and y coordinates in the range 0.0 - 1.0, and the bool indicates whether it is
* pressed.
*/
using TouchStatus = std::array<std::tuple<float, float, bool>, 16>;
/**
* A touch device is an input device that returns a touch status object
*/
using TouchDevice = InputDevice<TouchStatus>;
/**
* A mouse device is an input device that returns a tuple of two floats and four ints.
* The first two floats are X and Y device coordinates of the mouse (from 0-1).
* The s32s are the mouse wheel.
*/
using MouseDevice = InputDevice<std::tuple<float, float, s32, s32>>;
} // namespace Input
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