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citra/src/input_common/gcadapter/gc_poller.cpp
ameerj a80e566464 gcadapter: Implement auto map feature 
Implements the auto map functionality for the GC adapter.
The controls map nicely to the original 3ds controls, with the select button being mapped to the Z button on GC.
The ZL/ZR buttons are not mapped by this feature.
2021-04-24 02:03:40 -04:00

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// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <atomic>
#include <list>
#include <mutex>
#include <utility>
#include "common/assert.h"
#include "common/threadsafe_queue.h"
#include "input_common/gcadapter/gc_adapter.h"
#include "input_common/gcadapter/gc_poller.h"
namespace InputCommon {
namespace {
constexpr std::array<GCAdapter::PadButton, Settings::NativeButton::NumButtons> gc_to_3ds_mapping{{
GCAdapter::PadButton::ButtonA,
GCAdapter::PadButton::ButtonB,
GCAdapter::PadButton::ButtonX,
GCAdapter::PadButton::ButtonY,
GCAdapter::PadButton::ButtonUp,
GCAdapter::PadButton::ButtonDown,
GCAdapter::PadButton::ButtonLeft,
GCAdapter::PadButton::ButtonRight,
GCAdapter::PadButton::TriggerL,
GCAdapter::PadButton::TriggerR,
GCAdapter::PadButton::ButtonStart,
GCAdapter::PadButton::TriggerZ,
GCAdapter::PadButton::Undefined,
GCAdapter::PadButton::Undefined,
GCAdapter::PadButton::Undefined,
GCAdapter::PadButton::Undefined,
GCAdapter::PadButton::Undefined,
}};
}
class GCButton final : public Input::ButtonDevice {
public:
explicit GCButton(int port_, int button_, GCAdapter::Adapter* adapter)
: port(port_), button(button_), gcadapter(adapter) {}
~GCButton() override;
bool GetStatus() const override {
if (gcadapter->DeviceConnected(port)) {
return (gcadapter->GetPadState(port).buttons & button) != 0;
}
return false;
}
private:
const int port;
const int button;
GCAdapter::Adapter* gcadapter;
};
class GCAxisButton final : public Input::ButtonDevice {
public:
explicit GCAxisButton(int port_, int axis_, float threshold_, bool trigger_if_greater_,
GCAdapter::Adapter* adapter)
: port(port_), axis(axis_), threshold(threshold_), trigger_if_greater(trigger_if_greater_),
gcadapter(adapter) {}
bool GetStatus() const override {
if (gcadapter->DeviceConnected(port)) {
const float current_axis_value = gcadapter->GetPadState(port).axis_values.at(axis);
const float axis_value = current_axis_value / 128.0f;
if (trigger_if_greater) {
return axis_value > threshold;
}
return axis_value < -threshold;
}
return false;
}
private:
const u32 port;
const u32 axis;
float threshold;
bool trigger_if_greater;
const GCAdapter::Adapter* gcadapter;
};
GCButtonFactory::GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
: adapter(std::move(adapter_)) {}
GCButton::~GCButton() = default;
std::unique_ptr<Input::ButtonDevice> GCButtonFactory::Create(const Common::ParamPackage& params) {
const int button_id = params.Get("button", 0);
const int port = params.Get("port", 0);
constexpr s32 PAD_STICK_ID = static_cast<s32>(GCAdapter::PadButton::Stick);
// button is not an axis/stick button
if (button_id != PAD_STICK_ID) {
return std::make_unique<GCButton>(port, button_id, adapter.get());
}
// For Axis buttons, used by the binary sticks.
if (button_id == PAD_STICK_ID) {
const int axis = params.Get("axis", 0);
const float threshold = params.Get("threshold", 0.25f);
const std::string direction_name = params.Get("direction", "");
bool trigger_if_greater;
if (direction_name == "+") {
trigger_if_greater = true;
} else if (direction_name == "-") {
trigger_if_greater = false;
} else {
trigger_if_greater = true;
LOG_ERROR(Input, "Unknown direction {}", direction_name);
}
return std::make_unique<GCAxisButton>(port, axis, threshold, trigger_if_greater,
adapter.get());
}
UNREACHABLE();
return nullptr;
}
Common::ParamPackage GCButtonFactory::GetNextInput() {
Common::ParamPackage params;
GCAdapter::GCPadStatus pad;
auto& queue = adapter->GetPadQueue();
while (queue.Pop(pad)) {
// This while loop will break on the earliest detected button
params.Set("engine", "gcpad");
params.Set("port", static_cast<s32>(pad.port));
if (pad.button != GCAdapter::PadButton::Undefined) {
params.Set("button", static_cast<u16>(pad.button));
}
// For Axis button implementation
if (pad.axis != GCAdapter::PadAxes::Undefined) {
params.Set("axis", static_cast<u8>(pad.axis));
params.Set("button", static_cast<u16>(GCAdapter::PadButton::Stick));
params.Set("threshold", "0.25");
if (pad.axis_value > 0) {
params.Set("direction", "+");
} else {
params.Set("direction", "-");
}
break;
}
}
return params;
}
Common::ParamPackage GCButtonFactory::GetGcTo3DSMappedButton(
int port, Settings::NativeButton::Values button) {
Common::ParamPackage params({{"engine", "gcpad"}});
params.Set("port", port);
auto mapped_button = gc_to_3ds_mapping[static_cast<int>(button)];
if (mapped_button != GCAdapter::PadButton::Undefined) {
params.Set("button", static_cast<u16>(mapped_button));
}
return params;
}
void GCButtonFactory::Start() {
polling = true;
adapter->BeginConfiguration();
}
void GCButtonFactory::Stop() {
polling = false;
adapter->EndConfiguration();
}
class GCAnalog final : public Input::AnalogDevice {
public:
explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_,
const GCAdapter::Adapter* adapter)
: port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter) {}
float GetAxis(u32 axis) const {
if (gcadapter->DeviceConnected(port)) {
std::lock_guard lock{mutex};
const auto axis_value =
static_cast<float>(gcadapter->GetPadState(port).axis_values.at(axis));
return (axis_value) / 50.0f;
}
return 0.0f;
}
std::pair<float, float> GetAnalog(u32 analog_axis_x, u32 analog_axis_y) const {
float x = GetAxis(analog_axis_x);
float y = GetAxis(analog_axis_y);
// Make sure the coordinates are in the unit circle,
// otherwise normalize it.
float r = x * x + y * y;
if (r > 1.0f) {
r = std::sqrt(r);
x /= r;
y /= r;
}
return {x, y};
}
std::tuple<float, float> GetStatus() const override {
const auto [x, y] = GetAnalog(axis_x, axis_y);
const float r = std::sqrt((x * x) + (y * y));
if (r > deadzone) {
return {x / r * (r - deadzone) / (1 - deadzone),
y / r * (r - deadzone) / (1 - deadzone)};
}
return {0.0f, 0.0f};
}
private:
const u32 port;
const u32 axis_x;
const u32 axis_y;
const float deadzone;
const GCAdapter::Adapter* gcadapter;
mutable std::mutex mutex;
};
/// An analog device factory that creates analog devices from GC Adapter
GCAnalogFactory::GCAnalogFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
: adapter(std::move(adapter_)) {}
/**
* Creates analog device from joystick axes
* @param params contains parameters for creating the device:
* - "port": the nth gcpad on the adapter
* - "axis_x": the index of the axis to be bind as x-axis
* - "axis_y": the index of the axis to be bind as y-axis
*/
std::unique_ptr<Input::AnalogDevice> GCAnalogFactory::Create(const Common::ParamPackage& params) {
const auto port = static_cast<u32>(params.Get("port", 0));
const auto axis_x = static_cast<u32>(params.Get("axis_x", 0));
const auto axis_y = static_cast<u32>(params.Get("axis_y", 1));
const auto deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
return std::make_unique<GCAnalog>(port, axis_x, axis_y, deadzone, adapter.get());
}
void GCAnalogFactory::Start() {
polling = true;
adapter->BeginConfiguration();
}
void GCAnalogFactory::Stop() {
polling = false;
adapter->EndConfiguration();
}
Common::ParamPackage GCAnalogFactory::GetNextInput() {
GCAdapter::GCPadStatus pad;
Common::ParamPackage params;
auto& queue = adapter->GetPadQueue();
while (queue.Pop(pad)) {
if (pad.button != GCAdapter::PadButton::Undefined) {
params.Set("engine", "gcpad");
params.Set("port", static_cast<s32>(pad.port));
params.Set("button", static_cast<u16>(pad.button));
return params;
}
if (pad.axis == GCAdapter::PadAxes::Undefined ||
std::abs(static_cast<float>(pad.axis_value) / 128.0f) < 0.1f) {
continue;
}
// An analog device needs two axes, so we need to store the axis for later and wait for
// a second input event. The axes also must be from the same joystick.
const u8 axis = static_cast<u8>(pad.axis);
if (axis == 0 || axis == 1) {
analog_x_axis = 0;
analog_y_axis = 1;
controller_number = static_cast<s32>(pad.port);
break;
}
if (axis == 2 || axis == 3) {
analog_x_axis = 2;
analog_y_axis = 3;
controller_number = static_cast<s32>(pad.port);
break;
}
if (analog_x_axis == -1) {
analog_x_axis = axis;
controller_number = static_cast<s32>(pad.port);
} else if (analog_y_axis == -1 && analog_x_axis != axis &&
controller_number == static_cast<s32>(pad.port)) {
analog_y_axis = axis;
break;
}
}
if (analog_x_axis != -1 && analog_y_axis != -1) {
params.Set("engine", "gcpad");
params.Set("port", controller_number);
params.Set("axis_x", analog_x_axis);
params.Set("axis_y", analog_y_axis);
analog_x_axis = -1;
analog_y_axis = -1;
controller_number = -1;
return params;
}
return params;
}
Common::ParamPackage GCAnalogFactory::GetGcTo3DSMappedAnalog(
int port, Settings::NativeAnalog::Values analog) {
int x_axis, y_axis;
Common::ParamPackage params({{"engine", "gcpad"}});
params.Set("port", port);
if (analog == Settings::NativeAnalog::Values::CirclePad) {
x_axis = static_cast<s32>(GCAdapter::PadAxes::StickX);
y_axis = static_cast<s32>(GCAdapter::PadAxes::StickY);
} else if (analog == Settings::NativeAnalog::Values::CStick) {
x_axis = static_cast<s32>(GCAdapter::PadAxes::SubstickX);
y_axis = static_cast<s32>(GCAdapter::PadAxes::SubstickY);
} else {
LOG_WARNING(Input, "analog value out of range {}", analog);
return {{}};
}
params.Set("axis_x", x_axis);
params.Set("axis_y", y_axis);
return params;
}
} // namespace InputCommon
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