dolphin/Source/Core/InputCommon/ControllerInterface/CoreDevice.h

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// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <chrono>
#include <memory>
#include <mutex>
#include <optional>
#include <string>
#include <string_view>
#include <vector>
#include "Common/CommonTypes.h"
// idk in case I wanted to change it to double or something, idk what's best
typedef double ControlState;
namespace ciface
{
// 100Hz which homebrew docs very roughly imply is within WiiMote normal
// range, used for periodic haptic effects though often ignored by devices
// TODO: Make this configurable.
constexpr int RUMBLE_PERIOD_MS = 10;
// This needs to be at least as long as the longest rumble that might ever be played.
// Too short and it's going to stop in the middle of a long effect.
// Infinite values are invalid for ramp effects and probably not sensible.
constexpr int RUMBLE_LENGTH_MS = 1000 * 10;
// All inputs (other than accel/gyro) return 1.0 as their maximum value.
// Battery inputs will almost always be mapped to the "Battery" setting which is a percentage.
// If someone actually wants to map a battery input to a regular control they can divide by 100.
// I think this is better than requiring multiplication by 100 for the most common usage.
constexpr ControlState BATTERY_INPUT_MAX_VALUE = 100.0;
namespace Core
{
class Device
{
public:
class Input;
class Output;
//
// Control
//
// Control includes inputs and outputs
//
class Control // input or output
{
public:
virtual ~Control() = default;
virtual std::string GetName() const = 0;
virtual Input* ToInput() { return nullptr; }
virtual Output* ToOutput() { return nullptr; }
// May be overridden to allow multiple valid names.
// Useful for backwards-compatible configurations when names change.
virtual bool IsMatchingName(std::string_view name) const;
};
//
// Input
//
// An input on a device
//
class Input : public Control
{
public:
// Things like absolute axes/ absolute mouse position should override this to prevent
// undesirable behavior in our mapping logic.
virtual bool IsDetectable() const { return true; }
// Implementations should return a value from 0.0 to 1.0 across their normal range.
// One input should be provided for each "direction". (e.g. 2 for each axis)
// If possible, negative values may be returned in situations where an opposing input is
// activated. (e.g. When an underlying axis, X, is currently negative, "Axis X-", will return a
// positive value and "Axis X+" may return a negative value.)
// Doing so is solely to allow our input detection logic to better detect false positives.
// This is necessary when making use of "FullAnalogSurface" as multiple inputs will be seen
// increasing from 0.0 to 1.0 as a user tries to map just one. The negative values provide a
// view of the underlying axis. (Negative values are clamped off before they reach
// expression-parser or controller-emu)
virtual ControlState GetState() const = 0;
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Input* ToInput() override { return this; }
// Overridden by CombinedInput,
// so hotkey logic knows Ctrl, L_Ctrl, and R_Ctrl are the same,
// and so input detection can return the parent name.
virtual bool IsChild(const Input*) const { return false; }
};
class RelativeInput : public Input
{
public:
bool IsDetectable() const override { return false; }
};
//
// Output
//
// An output on a device
//
class Output : public Control
{
public:
virtual ~Output() = default;
virtual void SetState(ControlState state) = 0;
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Output* ToOutput() override { return this; }
};
virtual ~Device();
int GetId() const { return m_id; }
void SetId(int id) { m_id = id; }
virtual std::string GetName() const = 0;
virtual std::string GetSource() const = 0;
std::string GetQualifiedName() const;
virtual void UpdateInput() {}
// May be overridden to implement hotplug removal.
// Currently handled on a per-backend basis but this could change.
virtual bool IsValid() const { return true; }
// (e.g. Xbox 360 controllers have controller number LEDs which should match the ID we use.)
virtual std::optional<int> GetPreferredId() const;
const std::vector<Input*>& Inputs() const { return m_inputs; }
const std::vector<Output*>& Outputs() const { return m_outputs; }
Input* GetParentMostInput(Input* input) const;
Input* FindInput(std::string_view name) const;
Output* FindOutput(std::string_view name) const;
protected:
void AddInput(Input* const i);
void AddOutput(Output* const o);
class FullAnalogSurface final : public Input
{
public:
FullAnalogSurface(Input* low, Input* high) : m_low(*low), m_high(*high) {}
ControlState GetState() const override;
std::string GetName() const override;
bool IsMatchingName(std::string_view name) const override;
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private:
Input& m_low;
Input& m_high;
};
void AddAnalogInputs(Input* low, Input* high)
{
AddInput(low);
AddInput(high);
AddInput(new FullAnalogSurface(low, high));
AddInput(new FullAnalogSurface(high, low));
}
void AddCombinedInput(std::string name, const std::pair<std::string, std::string>& inputs);
private:
int m_id;
std::vector<Input*> m_inputs;
std::vector<Output*> m_outputs;
};
//
// DeviceQualifier
//
// Device qualifier used to match devices.
// Currently has ( source, id, name ) properties which match a device
//
class DeviceQualifier
{
public:
DeviceQualifier() : cid(-1) {}
DeviceQualifier(std::string source_, const int id_, std::string name_)
: source(std::move(source_)), cid(id_), name(std::move(name_))
{
}
void FromDevice(const Device* const dev);
void FromString(const std::string& str);
std::string ToString() const;
bool operator==(const DeviceQualifier& devq) const;
bool operator!=(const DeviceQualifier& devq) const;
bool operator==(const Device* dev) const;
bool operator!=(const Device* dev) const;
std::string source;
int cid;
std::string name;
};
class DeviceContainer
{
public:
using Clock = std::chrono::steady_clock;
struct InputDetection
{
std::shared_ptr<Device> device;
Device::Input* input;
Clock::time_point press_time;
std::optional<Clock::time_point> release_time;
ControlState smoothness;
};
Device::Input* FindInput(std::string_view name, const Device* def_dev) const;
Device::Output* FindOutput(std::string_view name, const Device* def_dev) const;
std::vector<std::string> GetAllDeviceStrings() const;
std::string GetDefaultDeviceString() const;
std::shared_ptr<Device> FindDevice(const DeviceQualifier& devq) const;
bool HasConnectedDevice(const DeviceQualifier& qualifier) const;
std::vector<InputDetection> DetectInput(const std::vector<std::string>& device_strings,
std::chrono::milliseconds initial_wait,
std::chrono::milliseconds confirmation_wait,
std::chrono::milliseconds maximum_wait) const;
protected:
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// Exclusively needed when reading/writing "m_devices"
mutable std::recursive_mutex m_devices_mutex;
std::vector<std::shared_ptr<Device>> m_devices;
};
} // namespace Core
} // namespace ciface