input_common: Eliminate most global state

Abstracts most of the input mechanisms under an InputSubsystem class
that is managed by the frontends, eliminating any static constructors
and destructors. This gets rid of global accessor functions and also
allows the frontends to have a more fine-grained control over the
lifecycle of the input subsystem.

This also makes it explicit which interfaces rely on the input subsystem
instead of making it opaque in the interface functions. All that remains
to migrate over is the factories, which can be done in a separate
change.

src/yuzu/configuration/configure_debug_controller.cpp

@@ -5,9 +5,10 @@
 #include "ui_configure_debug_controller.h"
 #include "yuzu/configuration/configure_debug_controller.h"
 
-ConfigureDebugController::ConfigureDebugController(QWidget* parent)
+ConfigureDebugController::ConfigureDebugController(QWidget* parent,
+                                                   InputCommon::InputSubsystem* input_subsystem)
     : QDialog(parent), ui(std::make_unique<Ui::ConfigureDebugController>()),
-      debug_controller(new ConfigureInputPlayer(this, 9, nullptr, true)) {
+      debug_controller(new ConfigureInputPlayer(this, 9, nullptr, input_subsystem, true)) {
     ui->setupUi(this);
 
     ui->controllerLayout->addWidget(debug_controller);

src/yuzu/configuration/configure_debug_controller.h

@@ -10,6 +10,10 @@
 
 class QPushButton;
 
+namespace InputCommon {
+class InputSubsystem;
+}
+
 namespace Ui {
 class ConfigureDebugController;
 }
@@ -18,7 +22,8 @@ class ConfigureDebugController : public QDialog {
     Q_OBJECT
 
 public:
-    explicit ConfigureDebugController(QWidget* parent);
+    explicit ConfigureDebugController(QWidget* parent,
+                                      InputCommon::InputSubsystem* input_subsystem);
     ~ConfigureDebugController() override;
 
     void ApplyConfiguration();

src/yuzu/configuration/configure_dialog.cpp

@@ -12,7 +12,8 @@
 #include "yuzu/configuration/configure_input_player.h"
 #include "yuzu/hotkeys.h"
 
-ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry)
+ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry,
+                                 InputCommon::InputSubsystem* input_subsystem)
     : QDialog(parent), ui(new Ui::ConfigureDialog), registry(registry) {
     Settings::configuring_global = true;
 
@@ -20,6 +21,8 @@ ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry)
     ui->hotkeysTab->Populate(registry);
     setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
+    ui->inputTab->Initialize(input_subsystem);
+
     SetConfiguration();
     PopulateSelectionList();
 

src/yuzu/configuration/configure_dialog.h

@@ -9,6 +9,10 @@
 
 class HotkeyRegistry;
 
+namespace InputCommon {
+class InputSubsystem;
+}
+
 namespace Ui {
 class ConfigureDialog;
 }
@@ -17,7 +21,8 @@ class ConfigureDialog : public QDialog {
     Q_OBJECT
 
 public:
-    explicit ConfigureDialog(QWidget* parent, HotkeyRegistry& registry);
+    explicit ConfigureDialog(QWidget* parent, HotkeyRegistry& registry,
+                             InputCommon::InputSubsystem* input_subsystem);
     ~ConfigureDialog() override;
 
     void ApplyConfiguration();

src/yuzu/configuration/configure_input.cpp

@@ -65,16 +65,20 @@ void OnDockedModeChanged(bool last_state, bool new_state) {
 ConfigureInput::ConfigureInput(QWidget* parent)
     : QWidget(parent), ui(std::make_unique<Ui::ConfigureInput>()) {
     ui->setupUi(this);
+}
 
+ConfigureInput::~ConfigureInput() = default;
+
+void ConfigureInput::Initialize(InputCommon::InputSubsystem* input_subsystem) {
     player_controllers = {
-        new ConfigureInputPlayer(this, 0, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 1, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 2, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 3, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 4, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 5, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 6, ui->consoleInputSettings),
-        new ConfigureInputPlayer(this, 7, ui->consoleInputSettings),
+        new ConfigureInputPlayer(this, 0, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 1, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 2, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 3, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 4, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 5, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 6, ui->consoleInputSettings, input_subsystem),
+        new ConfigureInputPlayer(this, 7, ui->consoleInputSettings, input_subsystem),
     };
 
     player_tabs = {
@@ -115,10 +119,12 @@ ConfigureInput::ConfigureInput(QWidget* parent)
     advanced = new ConfigureInputAdvanced(this);
     ui->tabAdvanced->setLayout(new QHBoxLayout(ui->tabAdvanced));
     ui->tabAdvanced->layout()->addWidget(advanced);
-    connect(advanced, &ConfigureInputAdvanced::CallDebugControllerDialog,
-            [this] { CallConfigureDialog<ConfigureDebugController>(*this); });
-    connect(advanced, &ConfigureInputAdvanced::CallMouseConfigDialog,
-            [this] { CallConfigureDialog<ConfigureMouseAdvanced>(*this); });
+    connect(advanced, &ConfigureInputAdvanced::CallDebugControllerDialog, [this, input_subsystem] {
+        CallConfigureDialog<ConfigureDebugController>(*this, input_subsystem);
+    });
+    connect(advanced, &ConfigureInputAdvanced::CallMouseConfigDialog, [this, input_subsystem] {
+        CallConfigureDialog<ConfigureMouseAdvanced>(*this, input_subsystem);
+    });
     connect(advanced, &ConfigureInputAdvanced::CallTouchscreenConfigDialog,
             [this] { CallConfigureDialog<ConfigureTouchscreenAdvanced>(*this); });
 
@@ -129,8 +135,6 @@ ConfigureInput::ConfigureInput(QWidget* parent)
     LoadConfiguration();
 }
 
-ConfigureInput::~ConfigureInput() = default;
-
 QList<QWidget*> ConfigureInput::GetSubTabs() const {
     return {
         ui->tabPlayer1, ui->tabPlayer2, ui->tabPlayer3, ui->tabPlayer4,  ui->tabPlayer5,

src/yuzu/configuration/configure_input.h

@@ -7,8 +7,8 @@
 #include <array>
 #include <memory>
 
-#include <QDialog>
 #include <QKeyEvent>
+#include <QWidget>
 
 #include "yuzu/configuration/configure_input_advanced.h"
 #include "yuzu/configuration/configure_input_player.h"
@@ -19,6 +19,10 @@ class QCheckBox;
 class QString;
 class QTimer;
 
+namespace InputCommon {
+class InputSubsystem;
+}
+
 namespace Ui {
 class ConfigureInput;
 }
@@ -32,6 +36,9 @@ public:
     explicit ConfigureInput(QWidget* parent = nullptr);
     ~ConfigureInput() override;
 
+    /// Initializes the input dialog with the given input subsystem.
+    void Initialize(InputCommon::InputSubsystem* input_subsystem_);
+
     /// Save all button configurations to settings file.
     void ApplyConfiguration();
 

src/yuzu/configuration/configure_input_player.cpp

@@ -11,12 +11,12 @@
 #include <QMenu>
 #include <QMessageBox>
 #include <QTimer>
-#include "common/assert.h"
 #include "common/param_package.h"
 #include "core/core.h"
 #include "core/hle/service/hid/controllers/npad.h"
 #include "core/hle/service/hid/hid.h"
 #include "core/hle/service/sm/sm.h"
+#include "input_common/gcadapter/gc_poller.h"
 #include "input_common/main.h"
 #include "ui_configure_input_player.h"
 #include "yuzu/configuration/config.h"
@@ -229,9 +229,11 @@ QString AnalogToText(const Common::ParamPackage& param, const std::string& dir)
 } // namespace
 
 ConfigureInputPlayer::ConfigureInputPlayer(QWidget* parent, std::size_t player_index,
-                                           QWidget* bottom_row, bool debug)
+                                           QWidget* bottom_row,
+                                           InputCommon::InputSubsystem* input_subsystem_,
+                                           bool debug)
     : QWidget(parent), ui(std::make_unique<Ui::ConfigureInputPlayer>()), player_index(player_index),
-      debug(debug), timeout_timer(std::make_unique<QTimer>()),
+      debug(debug), input_subsystem{input_subsystem_}, timeout_timer(std::make_unique<QTimer>()),
       poll_timer(std::make_unique<QTimer>()), bottom_row(bottom_row) {
     ui->setupUi(this);
 
@@ -287,7 +289,7 @@ ConfigureInputPlayer::ConfigureInputPlayer(QWidget* parent, std::size_t player_i
                         params.Set("direction", "+");
                         params.Set("threshold", "0.5");
                     }
-                    (*param) = std::move(params);
+                    *param = std::move(params);
                 },
                 InputCommon::Polling::DeviceType::Button);
         });
@@ -401,15 +403,15 @@ ConfigureInputPlayer::ConfigureInputPlayer(QWidget* parent, std::size_t player_i
 
     connect(poll_timer.get(), &QTimer::timeout, [this] {
         Common::ParamPackage params;
-        if (InputCommon::GetGCButtons()->IsPolling()) {
-            params = InputCommon::GetGCButtons()->GetNextInput();
+        if (input_subsystem->GetGCButtons()->IsPolling()) {
+            params = input_subsystem->GetGCButtons()->GetNextInput();
             if (params.Has("engine")) {
                 SetPollingResult(params, false);
                 return;
             }
         }
-        if (InputCommon::GetGCAnalogs()->IsPolling()) {
-            params = InputCommon::GetGCAnalogs()->GetNextInput();
+        if (input_subsystem->GetGCAnalogs()->IsPolling()) {
+            params = input_subsystem->GetGCAnalogs()->GetNextInput();
             if (params.Has("engine")) {
                 SetPollingResult(params, false);
                 return;
@@ -514,7 +516,7 @@ void ConfigureInputPlayer::LoadConfiguration() {
 }
 
 void ConfigureInputPlayer::UpdateInputDevices() {
-    input_devices = InputCommon::GetInputDevices();
+    input_devices = input_subsystem->GetInputDevices();
     ui->comboDevices->clear();
     for (auto device : input_devices) {
         ui->comboDevices->addItem(QString::fromStdString(device.Get("display", "Unknown")), {});
@@ -642,8 +644,8 @@ void ConfigureInputPlayer::UpdateMappingWithDefaults() {
         return;
     }
     const auto& device = input_devices[ui->comboDevices->currentIndex()];
-    auto button_mapping = InputCommon::GetButtonMappingForDevice(device);
-    auto analog_mapping = InputCommon::GetAnalogMappingForDevice(device);
+    auto button_mapping = input_subsystem->GetButtonMappingForDevice(device);
+    auto analog_mapping = input_subsystem->GetAnalogMappingForDevice(device);
     for (int i = 0; i < buttons_param.size(); ++i) {
         buttons_param[i] = button_mapping[static_cast<Settings::NativeButton::Values>(i)];
     }
@@ -666,7 +668,7 @@ void ConfigureInputPlayer::HandleClick(
 
     input_setter = new_input_setter;
 
-    device_pollers = InputCommon::Polling::GetPollers(type);
+    device_pollers = input_subsystem->GetPollers(type);
 
     for (auto& poller : device_pollers) {
         poller->Start();
@@ -676,9 +678,9 @@ void ConfigureInputPlayer::HandleClick(
     QWidget::grabKeyboard();
 
     if (type == InputCommon::Polling::DeviceType::Button) {
-        InputCommon::GetGCButtons()->BeginConfiguration();
+        input_subsystem->GetGCButtons()->BeginConfiguration();
     } else {
-        InputCommon::GetGCAnalogs()->BeginConfiguration();
+        input_subsystem->GetGCAnalogs()->BeginConfiguration();
     }
 
     timeout_timer->start(2500); // Cancel after 2.5 seconds
@@ -695,8 +697,8 @@ void ConfigureInputPlayer::SetPollingResult(const Common::ParamPackage& params,
     QWidget::releaseMouse();
     QWidget::releaseKeyboard();
 
-    InputCommon::GetGCButtons()->EndConfiguration();
-    InputCommon::GetGCAnalogs()->EndConfiguration();
+    input_subsystem->GetGCButtons()->EndConfiguration();
+    input_subsystem->GetGCAnalogs()->EndConfiguration();
 
     if (!abort) {
         (*input_setter)(params);

src/yuzu/configuration/configure_input_player.h

@@ -10,12 +10,11 @@
 #include <optional>
 #include <string>
 
-#include <QDialog>
+#include <QWidget>
 
 #include "common/param_package.h"
 #include "core/settings.h"
 #include "ui_configure_input.h"
-#include "yuzu/uisettings.h"
 
 class QCheckBox;
 class QKeyEvent;
@@ -27,6 +26,10 @@ class QString;
 class QTimer;
 class QWidget;
 
+namespace InputCommon {
+class InputSubsystem;
+}
+
 namespace InputCommon::Polling {
 class DevicePoller;
 enum class DeviceType;
@@ -41,6 +44,7 @@ class ConfigureInputPlayer : public QWidget {
 
 public:
     explicit ConfigureInputPlayer(QWidget* parent, std::size_t player_index, QWidget* bottom_row,
+                                  InputCommon::InputSubsystem* input_subsystem_,
                                   bool debug = false);
     ~ConfigureInputPlayer() override;
 
@@ -111,6 +115,8 @@ private:
     std::size_t player_index;
     bool debug;
 
+    InputCommon::InputSubsystem* input_subsystem;
+
     std::unique_ptr<QTimer> timeout_timer;
     std::unique_ptr<QTimer> poll_timer;
 

src/yuzu/configuration/configure_mouse_advanced.cpp

@@ -76,8 +76,10 @@ static QString ButtonToText(const Common::ParamPackage& param) {
     return QObject::tr("[unknown]");
 }
 
-ConfigureMouseAdvanced::ConfigureMouseAdvanced(QWidget* parent)
-    : QDialog(parent), ui(std::make_unique<Ui::ConfigureMouseAdvanced>()),
+ConfigureMouseAdvanced::ConfigureMouseAdvanced(QWidget* parent,
+                                               InputCommon::InputSubsystem* input_subsystem_)
+    : QDialog(parent),
+      ui(std::make_unique<Ui::ConfigureMouseAdvanced>()), input_subsystem{input_subsystem_},
       timeout_timer(std::make_unique<QTimer>()), poll_timer(std::make_unique<QTimer>()) {
     ui->setupUi(this);
     setFocusPolicy(Qt::ClickFocus);
@@ -209,7 +211,7 @@ void ConfigureMouseAdvanced::HandleClick(
 
     input_setter = new_input_setter;
 
-    device_pollers = InputCommon::Polling::GetPollers(type);
+    device_pollers = input_subsystem->GetPollers(type);
 
     for (auto& poller : device_pollers) {
         poller->Start();

src/yuzu/configuration/configure_mouse_advanced.h

@@ -8,12 +8,14 @@
 #include <optional>
 #include <QDialog>
 
-#include "core/settings.h"
-
 class QCheckBox;
 class QPushButton;
 class QTimer;
 
+namespace InputCommon {
+class InputSubsystem;
+}
+
 namespace Ui {
 class ConfigureMouseAdvanced;
 }
@@ -22,7 +24,7 @@ class ConfigureMouseAdvanced : public QDialog {
     Q_OBJECT
 
 public:
-    explicit ConfigureMouseAdvanced(QWidget* parent);
+    explicit ConfigureMouseAdvanced(QWidget* parent, InputCommon::InputSubsystem* input_subsystem_);
     ~ConfigureMouseAdvanced() override;
 
     void ApplyConfiguration();
@@ -57,6 +59,8 @@ private:
 
     std::unique_ptr<Ui::ConfigureMouseAdvanced> ui;
 
+    InputCommon::InputSubsystem* input_subsystem;
+
     /// This will be the the setting function when an input is awaiting configuration.
     std::optional<std::function<void(const Common::ParamPackage&)>> input_setter;