271 lines
9.2 KiB
C++
271 lines
9.2 KiB
C++
// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <atomic>
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#include <list>
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#include <mutex>
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#include <utility>
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#include "common/threadsafe_queue.h"
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#include "input_common/gcadapter/gc_adapter.h"
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#include "input_common/gcadapter/gc_poller.h"
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namespace InputCommon {
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class GCButton final : public Input::ButtonDevice {
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public:
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explicit GCButton(int port_, int button_, int axis_, GCAdapter::Adapter* adapter)
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: port(port_), button(button_), gcadapter(adapter) {}
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~GCButton() override;
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bool GetStatus() const override {
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return gcadapter->GetPadState()[port].buttons.at(button);
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}
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private:
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const int port;
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const int button;
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GCAdapter::Adapter* gcadapter;
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};
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class GCAxisButton final : public Input::ButtonDevice {
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public:
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explicit GCAxisButton(int port_, int axis_, float threshold_, bool trigger_if_greater_,
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GCAdapter::Adapter* adapter)
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: port(port_), axis(axis_), threshold(threshold_), trigger_if_greater(trigger_if_greater_),
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gcadapter(adapter) {
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// L/R triggers range is only in positive direction beginning near 0
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// 0.0 threshold equates to near half trigger press, but threshold accounts for variability.
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if (axis > 3) {
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threshold *= -0.5;
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}
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}
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bool GetStatus() const override {
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const float axis_value = (gcadapter->GetPadState()[port].axes.at(axis) - 128.0f) / 128.0f;
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if (trigger_if_greater) {
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return axis_value > threshold; // TODO(ameerj) : Fix threshold.
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}
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return axis_value < -threshold;
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}
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private:
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const int port;
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const int axis;
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float threshold;
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bool trigger_if_greater;
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GCAdapter::Adapter* gcadapter;
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};
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GCButtonFactory::GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
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: adapter(std::move(adapter_)) {}
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GCButton::~GCButton() = default;
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std::unique_ptr<Input::ButtonDevice> GCButtonFactory::Create(const Common::ParamPackage& params) {
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const int button_id = params.Get("button", 0);
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const int port = params.Get("port", 0);
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constexpr int PAD_STICK_ID = static_cast<u16>(GCAdapter::PadButton::PAD_STICK);
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// button is not an axis/stick button
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if (button_id != PAD_STICK_ID) {
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std::unique_ptr<GCButton> button =
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std::make_unique<GCButton>(port, button_id, params.Get("axis", 0), adapter.get());
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return std::move(button);
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}
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// For Axis buttons, used by the binary sticks.
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if (button_id == PAD_STICK_ID) {
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const int axis = params.Get("axis", 0);
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const float threshold = params.Get("threshold", 0.25f);
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const std::string direction_name = params.Get("direction", "");
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bool trigger_if_greater;
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if (direction_name == "+") {
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trigger_if_greater = true;
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} else if (direction_name == "-") {
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trigger_if_greater = false;
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} else {
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trigger_if_greater = true;
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LOG_ERROR(Input, "Unknown direction {}", direction_name);
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}
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return std::make_unique<GCAxisButton>(port, axis, threshold, trigger_if_greater,
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adapter.get());
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}
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}
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Common::ParamPackage GCButtonFactory::GetNextInput() {
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Common::ParamPackage params;
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GCAdapter::GCPadStatus pad;
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auto& queue = adapter->GetPadQueue();
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for (std::size_t port = 0; port < queue.size(); ++port) {
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while (queue[port].Pop(pad)) {
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// This while loop will break on the earliest detected button
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params.Set("engine", "gcpad");
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params.Set("port", static_cast<int>(port));
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for (const auto& button : GCAdapter::PadButtonArray) {
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const u16 button_value = static_cast<u16>(button);
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if (pad.button & button_value) {
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params.Set("button", button_value);
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break;
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}
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}
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// For Axis button implementation
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if (pad.axis != GCAdapter::PadAxes::Undefined) {
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params.Set("axis", static_cast<u8>(pad.axis));
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params.Set("button", static_cast<u16>(GCAdapter::PadButton::PAD_STICK));
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if (pad.axis_value > 128) {
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params.Set("direction", "+");
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params.Set("threshold", "0.25");
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} else {
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params.Set("direction", "-");
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params.Set("threshold", "-0.25");
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}
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break;
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}
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}
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}
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return params;
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}
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void GCButtonFactory::BeginConfiguration() {
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polling = true;
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adapter->BeginConfiguration();
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}
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void GCButtonFactory::EndConfiguration() {
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polling = false;
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adapter->EndConfiguration();
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}
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class GCAnalog final : public Input::AnalogDevice {
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public:
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GCAnalog(int port_, int axis_x_, int axis_y_, float deadzone_, GCAdapter::Adapter* adapter)
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: port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter) {}
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float GetAxis(int axis) const {
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std::lock_guard lock{mutex};
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// division is not by a perfect 128 to account for some variance in center location
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// e.g. my device idled at 131 in X, 120 in Y, and full range of motion was in range
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// [20-230]
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return (gcadapter->GetPadState()[port].axes.at(axis) - 128.0f) / 95.0f;
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}
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std::pair<float, float> GetAnalog(int axis_x, int axis_y) const {
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float x = GetAxis(axis_x);
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float y = GetAxis(axis_y);
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// Make sure the coordinates are in the unit circle,
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// otherwise normalize it.
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float r = x * x + y * y;
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if (r > 1.0f) {
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r = std::sqrt(r);
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x /= r;
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y /= r;
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}
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return {x, y};
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}
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std::tuple<float, float> GetStatus() const override {
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const auto [x, y] = GetAnalog(axis_x, axis_y);
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const float r = std::sqrt((x * x) + (y * y));
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if (r > deadzone) {
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return {x / r * (r - deadzone) / (1 - deadzone),
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y / r * (r - deadzone) / (1 - deadzone)};
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}
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return {0.0f, 0.0f};
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}
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bool GetAnalogDirectionStatus(Input::AnalogDirection direction) const override {
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const auto [x, y] = GetStatus();
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const float directional_deadzone = 0.4f;
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switch (direction) {
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case Input::AnalogDirection::RIGHT:
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return x > directional_deadzone;
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case Input::AnalogDirection::LEFT:
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return x < -directional_deadzone;
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case Input::AnalogDirection::UP:
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return y > directional_deadzone;
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case Input::AnalogDirection::DOWN:
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return y < -directional_deadzone;
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}
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return false;
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}
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private:
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const int port;
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const int axis_x;
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const int axis_y;
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const float deadzone;
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mutable std::mutex mutex;
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GCAdapter::Adapter* gcadapter;
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};
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/// An analog device factory that creates analog devices from GC Adapter
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GCAnalogFactory::GCAnalogFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
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: adapter(std::move(adapter_)) {}
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/**
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* Creates analog device from joystick axes
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* @param params contains parameters for creating the device:
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* - "port": the nth gcpad on the adapter
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* - "axis_x": the index of the axis to be bind as x-axis
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* - "axis_y": the index of the axis to be bind as y-axis
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*/
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std::unique_ptr<Input::AnalogDevice> GCAnalogFactory::Create(const Common::ParamPackage& params) {
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const int port = params.Get("port", 0);
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const int axis_x = params.Get("axis_x", 0);
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const int axis_y = params.Get("axis_y", 1);
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const float deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, .99f);
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return std::make_unique<GCAnalog>(port, axis_x, axis_y, deadzone, adapter.get());
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}
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void GCAnalogFactory::BeginConfiguration() {
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polling = true;
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adapter->BeginConfiguration();
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}
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void GCAnalogFactory::EndConfiguration() {
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polling = false;
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adapter->EndConfiguration();
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}
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Common::ParamPackage GCAnalogFactory::GetNextInput() {
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GCAdapter::GCPadStatus pad;
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auto& queue = adapter->GetPadQueue();
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for (std::size_t port = 0; port < queue.size(); ++port) {
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while (queue[port].Pop(pad)) {
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if (pad.axis == GCAdapter::PadAxes::Undefined ||
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std::abs((pad.axis_value - 128.0f) / 128.0f) < 0.1) {
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continue;
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}
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// An analog device needs two axes, so we need to store the axis for later and wait for
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// a second input event. The axes also must be from the same joystick.
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const u8 axis = static_cast<u8>(pad.axis);
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if (analog_x_axis == -1) {
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analog_x_axis = axis;
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controller_number = port;
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} else if (analog_y_axis == -1 && analog_x_axis != axis && controller_number == port) {
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analog_y_axis = axis;
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}
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}
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}
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Common::ParamPackage params;
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if (analog_x_axis != -1 && analog_y_axis != -1) {
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params.Set("engine", "gcpad");
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params.Set("port", controller_number);
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params.Set("axis_x", analog_x_axis);
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params.Set("axis_y", analog_y_axis);
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analog_x_axis = -1;
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analog_y_axis = -1;
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controller_number = -1;
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return params;
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}
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return params;
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}
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} // namespace InputCommon
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