3 files changed, 433 insertions, 303 deletions

diff --git a/src/input_common/gcadapter/gc_adapter.cpp b/src/input_common/gcadapter/gc_adapter.cpp
index c95feb0d7..b912188b6 100644
--- a/src/input_common/gcadapter/gc_adapter.cpp
+++ b/src/input_common/gcadapter/gc_adapter.cpp
@@ -21,26 +21,6 @@
 
 namespace GCAdapter {
 
-// Used to loop through and assign button in poller
-constexpr std::array<PadButton, 12> PadButtonArray{
-    PadButton::PAD_BUTTON_LEFT, PadButton::PAD_BUTTON_RIGHT, PadButton::PAD_BUTTON_DOWN,
-    PadButton::PAD_BUTTON_UP,   PadButton::PAD_TRIGGER_Z,    PadButton::PAD_TRIGGER_R,
-    PadButton::PAD_TRIGGER_L,   PadButton::PAD_BUTTON_A,     PadButton::PAD_BUTTON_B,
-    PadButton::PAD_BUTTON_X,    PadButton::PAD_BUTTON_Y,     PadButton::PAD_BUTTON_START,
-};
-
-static void PadToState(const GCPadStatus& pad, GCState& out_state) {
-    for (const auto& button : PadButtonArray) {
-        const auto button_key = static_cast<u16>(button);
-        const auto button_value = (pad.button & button_key) != 0;
-        out_state.buttons.insert_or_assign(static_cast<s32>(button_key), button_value);
-    }
-
-    for (std::size_t i = 0; i < pad.axis_values.size(); ++i) {
-        out_state.axes.insert_or_assign(static_cast<u32>(i), pad.axis_values[i]);
-    }
-}
-
 Adapter::Adapter() {
     if (usb_adapter_handle != nullptr) {
         return;
@@ -49,168 +29,263 @@ Adapter::Adapter() {
 
     const int init_res = libusb_init(&libusb_ctx);
     if (init_res == LIBUSB_SUCCESS) {
-        Setup();
+        adapter_scan_thread = std::thread(&Adapter::AdapterScanThread, this);
     } else {
         LOG_ERROR(Input, "libusb could not be initialized. failed with error = {}", init_res);
     }
 }
 
-GCPadStatus Adapter::GetPadStatus(std::size_t port, const std::array<u8, 37>& adapter_payload) {
-    GCPadStatus pad = {};
-    const std::size_t offset = 1 + (9 * port);
+Adapter::~Adapter() {
+    Reset();
+}
+
+void Adapter::AdapterInputThread() {
+    LOG_DEBUG(Input, "GC Adapter input thread started");
+    s32 payload_size{};
+    AdapterPayload adapter_payload{};
+
+    if (adapter_scan_thread.joinable()) {
+        adapter_scan_thread.join();
+    }
+
+    while (adapter_input_thread_running) {
+        libusb_interrupt_transfer(usb_adapter_handle, input_endpoint, adapter_payload.data(),
+                                  static_cast<s32>(adapter_payload.size()), &payload_size, 16);
+        if (IsPayloadCorrect(adapter_payload, payload_size)) {
+            UpdateControllers(adapter_payload);
+            UpdateVibrations();
+        }
+        std::this_thread::yield();
+    }
 
-    adapter_controllers_status[port] = static_cast<ControllerTypes>(adapter_payload[offset] >> 4);
+    if (restart_scan_thread) {
+        adapter_scan_thread = std::thread(&Adapter::AdapterScanThread, this);
+        restart_scan_thread = false;
+    }
+}
+
+bool Adapter::IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size) {
+    if (payload_size != static_cast<s32>(adapter_payload.size()) ||
+        adapter_payload[0] != LIBUSB_DT_HID) {
+        LOG_DEBUG(Input, "Error reading payload (size: {}, type: {:02x})", payload_size,
+                  adapter_payload[0]);
+        if (input_error_counter++ > 20) {
+            LOG_ERROR(Input, "GC adapter timeout, Is the adapter connected?");
+            adapter_input_thread_running = false;
+            restart_scan_thread = true;
+        }
+        return false;
+    }
+
+    input_error_counter = 0;
+    return true;
+}
+
+void Adapter::UpdateControllers(const AdapterPayload& adapter_payload) {
+    for (std::size_t port = 0; port < pads.size(); ++port) {
+        const std::size_t offset = 1 + (9 * port);
+        const auto type = static_cast<ControllerTypes>(adapter_payload[offset] >> 4);
+        UpdatePadType(port, type);
+        if (DeviceConnected(port)) {
+            const u8 b1 = adapter_payload[offset + 1];
+            const u8 b2 = adapter_payload[offset + 2];
+            UpdateStateButtons(port, b1, b2);
+            UpdateStateAxes(port, adapter_payload);
+            if (configuring) {
+                UpdateYuzuSettings(port);
+            }
+        }
+    }
+}
+
+void Adapter::UpdatePadType(std::size_t port, ControllerTypes pad_type) {
+    if (pads[port].type == pad_type) {
+        return;
+    }
+    // Device changed reset device and set new type
+    ResetDevice(port);
+    pads[port].type = pad_type;
+}
+
+void Adapter::UpdateStateButtons(std::size_t port, u8 b1, u8 b2) {
+    if (port >= pads.size()) {
+        return;
+    }
 
     static constexpr std::array<PadButton, 8> b1_buttons{
-        PadButton::PAD_BUTTON_A,    PadButton::PAD_BUTTON_B,    PadButton::PAD_BUTTON_X,
-        PadButton::PAD_BUTTON_Y,    PadButton::PAD_BUTTON_LEFT, PadButton::PAD_BUTTON_RIGHT,
-        PadButton::PAD_BUTTON_DOWN, PadButton::PAD_BUTTON_UP,
+        PadButton::ButtonA,    PadButton::ButtonB,     PadButton::ButtonX,    PadButton::ButtonY,
+        PadButton::ButtonLeft, PadButton::ButtonRight, PadButton::ButtonDown, PadButton::ButtonUp,
     };
 
     static constexpr std::array<PadButton, 4> b2_buttons{
-        PadButton::PAD_BUTTON_START,
-        PadButton::PAD_TRIGGER_Z,
-        PadButton::PAD_TRIGGER_R,
-        PadButton::PAD_TRIGGER_L,
+        PadButton::ButtonStart,
+        PadButton::TriggerZ,
+        PadButton::TriggerR,
+        PadButton::TriggerL,
     };
+    pads[port].buttons = 0;
+    for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
+        if ((b1 & (1U << i)) != 0) {
+            pads[port].buttons =
+                static_cast<u16>(pads[port].buttons | static_cast<u16>(b1_buttons[i]));
+            pads[port].last_button = b1_buttons[i];
+        }
+    }
 
+    for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
+        if ((b2 & (1U << j)) != 0) {
+            pads[port].buttons =
+                static_cast<u16>(pads[port].buttons | static_cast<u16>(b2_buttons[j]));
+            pads[port].last_button = b2_buttons[j];
+        }
+    }
+}
+
+void Adapter::UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload) {
+    if (port >= pads.size()) {
+        return;
+    }
+
+    const std::size_t offset = 1 + (9 * port);
     static constexpr std::array<PadAxes, 6> axes{
         PadAxes::StickX,    PadAxes::StickY,      PadAxes::SubstickX,
         PadAxes::SubstickY, PadAxes::TriggerLeft, PadAxes::TriggerRight,
     };
 
-    if (adapter_controllers_status[port] == ControllerTypes::None && !get_origin[port]) {
-        // Controller may have been disconnected, recalibrate if reconnected.
-        get_origin[port] = true;
+    for (const PadAxes axis : axes) {
+        const auto index = static_cast<std::size_t>(axis);
+        const u8 axis_value = adapter_payload[offset + 3 + index];
+        if (pads[port].axis_origin[index] == 255) {
+            pads[port].axis_origin[index] = axis_value;
+        }
+        pads[port].axis_values[index] =
+            static_cast<s16>(axis_value - pads[port].axis_origin[index]);
     }
+}
 
-    if (adapter_controllers_status[port] != ControllerTypes::None) {
-        const u8 b1 = adapter_payload[offset + 1];
-        const u8 b2 = adapter_payload[offset + 2];
+void Adapter::UpdateYuzuSettings(std::size_t port) {
+    if (port >= pads.size()) {
+        return;
+    }
 
-        for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
-            if ((b1 & (1U << i)) != 0) {
-                pad.button = static_cast<u16>(pad.button | static_cast<u16>(b1_buttons[i]));
-            }
-        }
+    constexpr u8 axis_threshold = 50;
+    GCPadStatus pad_status = {.port = port};
 
-        for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
-            if ((b2 & (1U << j)) != 0) {
-                pad.button = static_cast<u16>(pad.button | static_cast<u16>(b2_buttons[j]));
-            }
-        }
-        for (PadAxes axis : axes) {
-            const auto index = static_cast<std::size_t>(axis);
-            pad.axis_values[index] = adapter_payload[offset + 3 + index];
-        }
+    if (pads[port].buttons != 0) {
+        pad_status.button = pads[port].last_button;
+        pad_queue.Push(pad_status);
+    }
+
+    // Accounting for a threshold here to ensure an intentional press
+    for (std::size_t i = 0; i < pads[port].axis_values.size(); ++i) {
+        const s16 value = pads[port].axis_values[i];
 
-        if (get_origin[port]) {
-            origin_status[port].axis_values = pad.axis_values;
-            get_origin[port] = false;
+        if (value > axis_threshold || value < -axis_threshold) {
+            pad_status.axis = static_cast<PadAxes>(i);
+            pad_status.axis_value = value;
+            pad_status.axis_threshold = axis_threshold;
+            pad_queue.Push(pad_status);
         }
     }
-    return pad;
 }
 
-void Adapter::Read() {
-    LOG_DEBUG(Input, "GC Adapter Read() thread started");
+void Adapter::UpdateVibrations() {
+    // Use 8 states to keep the switching between on/off fast enough for
+    // a human to not notice the difference between switching from on/off
+    // More states = more rumble strengths = slower update time
+    constexpr u8 vibration_states = 8;
 
-    int payload_size;
-    std::array<u8, 37> adapter_payload;
-    std::array<GCPadStatus, 4> pads;
-
-    while (adapter_thread_running) {
-        libusb_interrupt_transfer(usb_adapter_handle, input_endpoint, adapter_payload.data(),
-                                  sizeof(adapter_payload), &payload_size, 16);
-
-        if (payload_size != sizeof(adapter_payload) || adapter_payload[0] != LIBUSB_DT_HID) {
-            LOG_ERROR(Input,
-                      "Error reading payload (size: {}, type: {:02x}) Is the adapter connected?",
-                      payload_size, adapter_payload[0]);
-            adapter_thread_running = false; // error reading from adapter, stop reading.
-            break;
-        }
-        for (std::size_t port = 0; port < pads.size(); ++port) {
-            pads[port] = GetPadStatus(port, adapter_payload);
-            if (DeviceConnected(port) && configuring) {
-                if (pads[port].button != 0) {
-                    pad_queue[port].Push(pads[port]);
-                }
+    vibration_counter = (vibration_counter + 1) % vibration_states;
 
-                // Accounting for a threshold here to ensure an intentional press
-                for (size_t i = 0; i < pads[port].axis_values.size(); ++i) {
-                    const u8 value = pads[port].axis_values[i];
-                    const u8 origin = origin_status[port].axis_values[i];
-
-                    if (value > origin + pads[port].THRESHOLD ||
-                        value < origin - pads[port].THRESHOLD) {
-                        pads[port].axis = static_cast<PadAxes>(i);
-                        pads[port].axis_value = pads[port].axis_values[i];
-                        pad_queue[port].Push(pads[port]);
-                    }
-                }
-            }
-            PadToState(pads[port], state[port]);
-        }
-        std::this_thread::yield();
+    for (GCController& pad : pads) {
+        const bool vibrate = pad.rumble_amplitude > vibration_counter;
+        vibration_changed |= vibrate != pad.enable_vibration;
+        pad.enable_vibration = vibrate;
     }
+    SendVibrations();
 }
 
-void Adapter::Setup() {
-    // Initialize all controllers as unplugged
-    adapter_controllers_status.fill(ControllerTypes::None);
-    // Initialize all ports to store axis origin values
-    get_origin.fill(true);
-
-    // pointer to list of connected usb devices
-    libusb_device** devices{};
-
-    // populate the list of devices, get the count
-    const ssize_t device_count = libusb_get_device_list(libusb_ctx, &devices);
-    if (device_count < 0) {
-        LOG_ERROR(Input, "libusb_get_device_list failed with error: {}", device_count);
+void Adapter::SendVibrations() {
+    if (!rumble_enabled || !vibration_changed) {
         return;
     }
-
-    if (devices != nullptr) {
-        for (std::size_t index = 0; index < static_cast<std::size_t>(device_count); ++index) {
-            if (CheckDeviceAccess(devices[index])) {
-                // GC Adapter found and accessible, registering it
-                GetGCEndpoint(devices[index]);
-                break;
-            }
+    s32 size{};
+    constexpr u8 rumble_command = 0x11;
+    const u8 p1 = pads[0].enable_vibration;
+    const u8 p2 = pads[1].enable_vibration;
+    const u8 p3 = pads[2].enable_vibration;
+    const u8 p4 = pads[3].enable_vibration;
+    std::array<u8, 5> payload = {rumble_command, p1, p2, p3, p4};
+    const int err = libusb_interrupt_transfer(usb_adapter_handle, output_endpoint, payload.data(),
+                                              static_cast<s32>(payload.size()), &size, 16);
+    if (err) {
+        LOG_DEBUG(Input, "Adapter libusb write failed: {}", libusb_error_name(err));
+        if (output_error_counter++ > 5) {
+            LOG_ERROR(Input, "GC adapter output timeout, Rumble disabled");
+            rumble_enabled = false;
         }
-        libusb_free_device_list(devices, 1);
+        return;
     }
+    output_error_counter = 0;
+    vibration_changed = false;
 }
 
-bool Adapter::CheckDeviceAccess(libusb_device* device) {
-    libusb_device_descriptor desc;
-    const int get_descriptor_error = libusb_get_device_descriptor(device, &desc);
-    if (get_descriptor_error) {
-        // could not acquire the descriptor, no point in trying to use it.
-        LOG_ERROR(Input, "libusb_get_device_descriptor failed with error: {}",
-                  get_descriptor_error);
-        return false;
+bool Adapter::RumblePlay(std::size_t port, f32 amplitude) {
+    amplitude = std::clamp(amplitude, 0.0f, 1.0f);
+    const auto raw_amp = static_cast<u8>(amplitude * 0x8);
+    pads[port].rumble_amplitude = raw_amp;
+
+    return rumble_enabled;
+}
+
+void Adapter::AdapterScanThread() {
+    adapter_scan_thread_running = true;
+    adapter_input_thread_running = false;
+    if (adapter_input_thread.joinable()) {
+        adapter_input_thread.join();
+    }
+    ClearLibusbHandle();
+    ResetDevices();
+    while (adapter_scan_thread_running && !adapter_input_thread_running) {
+        Setup();
+        std::this_thread::sleep_for(std::chrono::seconds(1));
     }
+}
 
-    if (desc.idVendor != 0x057e || desc.idProduct != 0x0337) {
-        // This isn't the device we are looking for.
-        return false;
+void Adapter::Setup() {
+    usb_adapter_handle = libusb_open_device_with_vid_pid(libusb_ctx, 0x057e, 0x0337);
+
+    if (usb_adapter_handle == NULL) {
+        return;
+    }
+    if (!CheckDeviceAccess()) {
+        ClearLibusbHandle();
+        return;
     }
-    const int open_error = libusb_open(device, &usb_adapter_handle);
 
-    if (open_error == LIBUSB_ERROR_ACCESS) {
-        LOG_ERROR(Input, "Yuzu can not gain access to this device: ID {:04X}:{:04X}.",
-                  desc.idVendor, desc.idProduct);
-        return false;
+    libusb_device* device = libusb_get_device(usb_adapter_handle);
+
+    LOG_INFO(Input, "GC adapter is now connected");
+    // GC Adapter found and accessible, registering it
+    if (GetGCEndpoint(device)) {
+        adapter_scan_thread_running = false;
+        adapter_input_thread_running = true;
+        rumble_enabled = true;
+        input_error_counter = 0;
+        output_error_counter = 0;
+        adapter_input_thread = std::thread(&Adapter::AdapterInputThread, this);
     }
-    if (open_error) {
-        LOG_ERROR(Input, "libusb_open failed to open device with error = {}", open_error);
-        return false;
+}
+
+bool Adapter::CheckDeviceAccess() {
+    // This fixes payload problems from offbrand GCAdapters
+    const s32 control_transfer_error =
+        libusb_control_transfer(usb_adapter_handle, 0x21, 11, 0x0001, 0, nullptr, 0, 1000);
+    if (control_transfer_error < 0) {
+        LOG_ERROR(Input, "libusb_control_transfer failed with error= {}", control_transfer_error);
     }
 
-    int kernel_driver_error = libusb_kernel_driver_active(usb_adapter_handle, 0);
+    s32 kernel_driver_error = libusb_kernel_driver_active(usb_adapter_handle, 0);
     if (kernel_driver_error == 1) {
         kernel_driver_error = libusb_detach_kernel_driver(usb_adapter_handle, 0);
         if (kernel_driver_error != 0 && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
@@ -236,13 +311,13 @@ bool Adapter::CheckDeviceAccess(libusb_device* device) {
     return true;
 }
 
-void Adapter::GetGCEndpoint(libusb_device* device) {
+bool Adapter::GetGCEndpoint(libusb_device* device) {
     libusb_config_descriptor* config = nullptr;
     const int config_descriptor_return = libusb_get_config_descriptor(device, 0, &config);
     if (config_descriptor_return != LIBUSB_SUCCESS) {
         LOG_ERROR(Input, "libusb_get_config_descriptor failed with error = {}",
                   config_descriptor_return);
-        return;
+        return false;
     }
 
     for (u8 ic = 0; ic < config->bNumInterfaces; ic++) {
@@ -264,31 +339,51 @@ void Adapter::GetGCEndpoint(libusb_device* device) {
     unsigned char clear_payload = 0x13;
     libusb_interrupt_transfer(usb_adapter_handle, output_endpoint, &clear_payload,
                               sizeof(clear_payload), nullptr, 16);
-
-    adapter_thread_running = true;
-    adapter_input_thread = std::thread(&Adapter::Read, this);
+    return true;
 }
 
-Adapter::~Adapter() {
-    Reset();
-}
+void Adapter::JoinThreads() {
+    restart_scan_thread = false;
+    adapter_input_thread_running = false;
+    adapter_scan_thread_running = false;
 
-void Adapter::Reset() {
-    if (adapter_thread_running) {
-        adapter_thread_running = false;
+    if (adapter_scan_thread.joinable()) {
+        adapter_scan_thread.join();
     }
+
     if (adapter_input_thread.joinable()) {
         adapter_input_thread.join();
     }
+}
 
-    adapter_controllers_status.fill(ControllerTypes::None);
-    get_origin.fill(true);
-
+void Adapter::ClearLibusbHandle() {
     if (usb_adapter_handle) {
         libusb_release_interface(usb_adapter_handle, 1);
         libusb_close(usb_adapter_handle);
         usb_adapter_handle = nullptr;
     }
+}
+
+void Adapter::ResetDevices() {
+    for (std::size_t i = 0; i < pads.size(); ++i) {
+        ResetDevice(i);
+    }
+}
+
+void Adapter::ResetDevice(std::size_t port) {
+    pads[port].type = ControllerTypes::None;
+    pads[port].enable_vibration = false;
+    pads[port].rumble_amplitude = 0;
+    pads[port].buttons = 0;
+    pads[port].last_button = PadButton::Undefined;
+    pads[port].axis_values.fill(0);
+    pads[port].axis_origin.fill(255);
+}
+
+void Adapter::Reset() {
+    JoinThreads();
+    ClearLibusbHandle();
+    ResetDevices();
 
     if (libusb_ctx) {
         libusb_exit(libusb_ctx);
@@ -297,11 +392,11 @@ void Adapter::Reset() {
 
 std::vector<Common::ParamPackage> Adapter::GetInputDevices() const {
     std::vector<Common::ParamPackage> devices;
-    for (std::size_t port = 0; port < state.size(); ++port) {
+    for (std::size_t port = 0; port < pads.size(); ++port) {
         if (!DeviceConnected(port)) {
             continue;
         }
-        std::string name = fmt::format("Gamecube Controller {}", port);
+        std::string name = fmt::format("Gamecube Controller {}", port + 1);
         devices.emplace_back(Common::ParamPackage{
             {"class", "gcpad"},
             {"display", std::move(name)},
@@ -318,18 +413,18 @@ InputCommon::ButtonMapping Adapter::GetButtonMappingForDevice(
     // This list also excludes any button that can't be really mapped
     static constexpr std::array<std::pair<Settings::NativeButton::Values, PadButton>, 12>
         switch_to_gcadapter_button = {
-            std::pair{Settings::NativeButton::A, PadButton::PAD_BUTTON_A},
-            {Settings::NativeButton::B, PadButton::PAD_BUTTON_B},
-            {Settings::NativeButton::X, PadButton::PAD_BUTTON_X},
-            {Settings::NativeButton::Y, PadButton::PAD_BUTTON_Y},
-            {Settings::NativeButton::Plus, PadButton::PAD_BUTTON_START},
-            {Settings::NativeButton::DLeft, PadButton::PAD_BUTTON_LEFT},
-            {Settings::NativeButton::DUp, PadButton::PAD_BUTTON_UP},
-            {Settings::NativeButton::DRight, PadButton::PAD_BUTTON_RIGHT},
-            {Settings::NativeButton::DDown, PadButton::PAD_BUTTON_DOWN},
-            {Settings::NativeButton::SL, PadButton::PAD_TRIGGER_L},
-            {Settings::NativeButton::SR, PadButton::PAD_TRIGGER_R},
-            {Settings::NativeButton::R, PadButton::PAD_TRIGGER_Z},
+            std::pair{Settings::NativeButton::A, PadButton::ButtonA},
+            {Settings::NativeButton::B, PadButton::ButtonB},
+            {Settings::NativeButton::X, PadButton::ButtonX},
+            {Settings::NativeButton::Y, PadButton::ButtonY},
+            {Settings::NativeButton::Plus, PadButton::ButtonStart},
+            {Settings::NativeButton::DLeft, PadButton::ButtonLeft},
+            {Settings::NativeButton::DUp, PadButton::ButtonUp},
+            {Settings::NativeButton::DRight, PadButton::ButtonRight},
+            {Settings::NativeButton::DDown, PadButton::ButtonDown},
+            {Settings::NativeButton::SL, PadButton::TriggerL},
+            {Settings::NativeButton::SR, PadButton::TriggerR},
+            {Settings::NativeButton::R, PadButton::TriggerZ},
         };
     if (!params.Has("port")) {
         return {};
@@ -352,8 +447,10 @@ InputCommon::ButtonMapping Adapter::GetButtonMappingForDevice(
     for (const auto& [switch_button, gcadapter_axis] : switch_to_gcadapter_axis) {
         Common::ParamPackage button_params({{"engine", "gcpad"}});
         button_params.Set("port", params.Get("port", 0));
-        button_params.Set("button", static_cast<int>(PadButton::PAD_STICK));
-        button_params.Set("axis", static_cast<int>(gcadapter_axis));
+        button_params.Set("button", static_cast<s32>(PadButton::Stick));
+        button_params.Set("axis", static_cast<s32>(gcadapter_axis));
+        button_params.Set("threshold", 0.5f);
+        button_params.Set("direction", "+");
         mapping.insert_or_assign(switch_button, std::move(button_params));
     }
     return mapping;
@@ -382,46 +479,33 @@ InputCommon::AnalogMapping Adapter::GetAnalogMappingForDevice(
 }
 
 bool Adapter::DeviceConnected(std::size_t port) const {
-    return adapter_controllers_status[port] != ControllerTypes::None;
-}
-
-void Adapter::ResetDeviceType(std::size_t port) {
-    adapter_controllers_status[port] = ControllerTypes::None;
+    return pads[port].type != ControllerTypes::None;
 }
 
 void Adapter::BeginConfiguration() {
-    get_origin.fill(true);
-    for (auto& pq : pad_queue) {
-        pq.Clear();
-    }
+    pad_queue.Clear();
     configuring = true;
 }
 
 void Adapter::EndConfiguration() {
-    for (auto& pq : pad_queue) {
-        pq.Clear();
-    }
+    pad_queue.Clear();
     configuring = false;
 }
 
-std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() {
+Common::SPSCQueue<GCPadStatus>& Adapter::GetPadQueue() {
     return pad_queue;
 }
 
-const std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() const {
+const Common::SPSCQueue<GCPadStatus>& Adapter::GetPadQueue() const {
     return pad_queue;
 }
 
-std::array<GCState, 4>& Adapter::GetPadState() {
-    return state;
-}
-
-const std::array<GCState, 4>& Adapter::GetPadState() const {
-    return state;
+GCController& Adapter::GetPadState(std::size_t port) {
+    return pads.at(port);
 }
 
-int Adapter::GetOriginValue(u32 port, u32 axis) const {
-    return origin_status[port].axis_values[axis];
+const GCController& Adapter::GetPadState(std::size_t port) const {
+    return pads.at(port);
 }
 
 } // namespace GCAdapter
diff --git a/src/input_common/gcadapter/gc_adapter.h b/src/input_common/gcadapter/gc_adapter.h
index 4f5f3de8e..d28dcfad3 100644
--- a/src/input_common/gcadapter/gc_adapter.h
+++ b/src/input_common/gcadapter/gc_adapter.h
@@ -19,24 +19,23 @@ struct libusb_device_handle;
 namespace GCAdapter {
 
 enum class PadButton {
-    PAD_BUTTON_LEFT = 0x0001,
-    PAD_BUTTON_RIGHT = 0x0002,
-    PAD_BUTTON_DOWN = 0x0004,
-    PAD_BUTTON_UP = 0x0008,
-    PAD_TRIGGER_Z = 0x0010,
-    PAD_TRIGGER_R = 0x0020,
-    PAD_TRIGGER_L = 0x0040,
-    PAD_BUTTON_A = 0x0100,
-    PAD_BUTTON_B = 0x0200,
-    PAD_BUTTON_X = 0x0400,
-    PAD_BUTTON_Y = 0x0800,
-    PAD_BUTTON_START = 0x1000,
+    Undefined = 0x0000,
+    ButtonLeft = 0x0001,
+    ButtonRight = 0x0002,
+    ButtonDown = 0x0004,
+    ButtonUp = 0x0008,
+    TriggerZ = 0x0010,
+    TriggerR = 0x0020,
+    TriggerL = 0x0040,
+    ButtonA = 0x0100,
+    ButtonB = 0x0200,
+    ButtonX = 0x0400,
+    ButtonY = 0x0800,
+    ButtonStart = 0x1000,
     // Below is for compatibility with "AxisButton" type
-    PAD_STICK = 0x2000,
+    Stick = 0x2000,
 };
 
-extern const std::array<PadButton, 12> PadButtonArray;
-
 enum class PadAxes : u8 {
     StickX,
     StickY,
@@ -47,87 +46,122 @@ enum class PadAxes : u8 {
     Undefined,
 };
 
+enum class ControllerTypes {
+    None,
+    Wired,
+    Wireless,
+};
+
 struct GCPadStatus {
-    u16 button{}; // Or-ed PAD_BUTTON_* and PAD_TRIGGER_* bits
+    std::size_t port{};
 
-    std::array<u8, 6> axis_values{};    // Triggers and sticks, following indices defined in PadAxes
-    static constexpr u8 THRESHOLD = 50; // Threshold for axis press for polling
+    PadButton button{PadButton::Undefined}; // Or-ed PAD_BUTTON_* and PAD_TRIGGER_* bits
 
-    u8 port{};
     PadAxes axis{PadAxes::Undefined};
-    u8 axis_value{255};
+    s16 axis_value{};
+    u8 axis_threshold{50};
 };
 
-struct GCState {
-    std::unordered_map<int, bool> buttons;
-    std::unordered_map<u32, u16> axes;
+struct GCController {
+    ControllerTypes type{};
+    bool enable_vibration{};
+    u8 rumble_amplitude{};
+    u16 buttons{};
+    PadButton last_button{};
+    std::array<s16, 6> axis_values{};
+    std::array<u8, 6> axis_origin{};
 };
 
-enum class ControllerTypes { None, Wired, Wireless };
-
 class Adapter {
 public:
-    /// Initialize the GC Adapter capture and read sequence
     Adapter();
-
-    /// Close the adapter read thread and release the adapter
     ~Adapter();
+
+    /// Request a vibration for a controlelr
+    bool RumblePlay(std::size_t port, f32 amplitude);
+
     /// Used for polling
     void BeginConfiguration();
     void EndConfiguration();
 
+    Common::SPSCQueue<GCPadStatus>& GetPadQueue();
+    const Common::SPSCQueue<GCPadStatus>& GetPadQueue() const;
+
+    GCController& GetPadState(std::size_t port);
+    const GCController& GetPadState(std::size_t port) const;
+
+    /// Returns true if there is a device connected to port
+    bool DeviceConnected(std::size_t port) const;
+
+    /// Used for automapping features
     std::vector<Common::ParamPackage> GetInputDevices() const;
     InputCommon::ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) const;
     InputCommon::AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) const;
 
-    /// Returns true if there is a device connected to port
-    bool DeviceConnected(std::size_t port) const;
+private:
+    using AdapterPayload = std::array<u8, 37>;
 
-    std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue();
-    const std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue() const;
+    void UpdatePadType(std::size_t port, ControllerTypes pad_type);
+    void UpdateControllers(const AdapterPayload& adapter_payload);
+    void UpdateYuzuSettings(std::size_t port);
+    void UpdateStateButtons(std::size_t port, u8 b1, u8 b2);
+    void UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload);
+    void UpdateVibrations();
 
-    std::array<GCState, 4>& GetPadState();
-    const std::array<GCState, 4>& GetPadState() const;
+    void AdapterInputThread();
 
-    int GetOriginValue(u32 port, u32 axis) const;
+    void AdapterScanThread();
 
-private:
-    GCPadStatus GetPadStatus(std::size_t port, const std::array<u8, 37>& adapter_payload);
+    bool IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size);
+
+    // Updates vibration state of all controllers
+    void SendVibrations();
+
+    /// For use in initialization, querying devices to find the adapter
+    void Setup();
 
-    void Read();
+    /// Resets status of all GC controller devices to a disconected state
+    void ResetDevices();
 
-    /// Resets status of device connected to port
-    void ResetDeviceType(std::size_t port);
+    /// Resets status of device connected to a disconected state
+    void ResetDevice(std::size_t port);
 
     /// Returns true if we successfully gain access to GC Adapter
-    bool CheckDeviceAccess(libusb_device* device);
+    bool CheckDeviceAccess();
 
-    /// Captures GC Adapter endpoint address,
-    void GetGCEndpoint(libusb_device* device);
+    /// Captures GC Adapter endpoint address
+    /// Returns true if the endpoind was set correctly
+    bool GetGCEndpoint(libusb_device* device);
 
     /// For shutting down, clear all data, join all threads, release usb
     void Reset();
 
-    /// For use in initialization, querying devices to find the adapter
-    void Setup();
+    // Join all threads
+    void JoinThreads();
+
+    // Release usb handles
+    void ClearLibusbHandle();
 
     libusb_device_handle* usb_adapter_handle = nullptr;
+    std::array<GCController, 4> pads;
+    Common::SPSCQueue<GCPadStatus> pad_queue;
 
     std::thread adapter_input_thread;
-    bool adapter_thread_running;
+    std::thread adapter_scan_thread;
+    bool adapter_input_thread_running;
+    bool adapter_scan_thread_running;
+    bool restart_scan_thread;
 
     libusb_context* libusb_ctx;
 
-    u8 input_endpoint = 0;
-    u8 output_endpoint = 0;
-
-    bool configuring = false;
+    u8 input_endpoint{0};
+    u8 output_endpoint{0};
+    u8 input_error_counter{0};
+    u8 output_error_counter{0};
+    int vibration_counter{0};
 
-    std::array<GCState, 4> state;
-    std::array<bool, 4> get_origin;
-    std::array<GCPadStatus, 4> origin_status;
-    std::array<Common::SPSCQueue<GCPadStatus>, 4> pad_queue;
-    std::array<ControllerTypes, 4> adapter_controllers_status{};
+    bool configuring{false};
+    bool rumble_enabled{true};
+    bool vibration_changed{true};
 };
-
 } // namespace GCAdapter
diff --git a/src/input_common/gcadapter/gc_poller.cpp b/src/input_common/gcadapter/gc_poller.cpp
index 893556916..6bd6f57fc 100644
--- a/src/input_common/gcadapter/gc_poller.cpp
+++ b/src/input_common/gcadapter/gc_poller.cpp
@@ -15,22 +15,30 @@ namespace InputCommon {
 
 class GCButton final : public Input::ButtonDevice {
 public:
-    explicit GCButton(u32 port_, int button_, const GCAdapter::Adapter* adapter)
+    explicit GCButton(u32 port_, s32 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.at(button);
+            return (gcadapter->GetPadState(port).buttons & button) != 0;
         }
         return false;
     }
 
+    bool SetRumblePlay(f32 amp_high, f32 amp_low, f32 freq_high, f32 freq_low) const override {
+        const float amplitude = amp_high + amp_low > 2.0f ? 1.0f : (amp_high + amp_low) * 0.5f;
+        const auto new_amp =
+            static_cast<f32>(pow(amplitude, 0.5f) * (3.0f - 2.0f * pow(amplitude, 0.15f)));
+
+        return gcadapter->RumblePlay(port, new_amp);
+    }
+
 private:
     const u32 port;
-    const int button;
-    const GCAdapter::Adapter* gcadapter;
+    const s32 button;
+    GCAdapter::Adapter* gcadapter;
 };
 
 class GCAxisButton final : public Input::ButtonDevice {
@@ -38,13 +46,12 @@ public:
     explicit GCAxisButton(u32 port_, u32 axis_, float threshold_, bool trigger_if_greater_,
                           const GCAdapter::Adapter* adapter)
         : port(port_), axis(axis_), threshold(threshold_), trigger_if_greater(trigger_if_greater_),
-          gcadapter(adapter),
-          origin_value(static_cast<float>(adapter->GetOriginValue(port_, axis_))) {}
+          gcadapter(adapter) {}
 
     bool GetStatus() const override {
         if (gcadapter->DeviceConnected(port)) {
-            const float current_axis_value = gcadapter->GetPadState()[port].axes.at(axis);
-            const float axis_value = (current_axis_value - origin_value) / 128.0f;
+            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) {
                 // TODO: Might be worthwile to set a slider for the trigger threshold. It is
                 // currently always set to 0.5 in configure_input_player.cpp ZL/ZR HandleClick
@@ -61,7 +68,6 @@ private:
     float threshold;
     bool trigger_if_greater;
     const GCAdapter::Adapter* gcadapter;
-    const float origin_value;
 };
 
 GCButtonFactory::GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
@@ -73,7 +79,7 @@ std::unique_ptr<Input::ButtonDevice> GCButtonFactory::Create(const Common::Param
     const auto button_id = params.Get("button", 0);
     const auto port = static_cast<u32>(params.Get("port", 0));
 
-    constexpr int PAD_STICK_ID = static_cast<u16>(GCAdapter::PadButton::PAD_STICK);
+    constexpr s32 PAD_STICK_ID = static_cast<s32>(GCAdapter::PadButton::Stick);
 
     // button is not an axis/stick button
     if (button_id != PAD_STICK_ID) {
@@ -106,32 +112,25 @@ Common::ParamPackage GCButtonFactory::GetNextInput() const {
     Common::ParamPackage params;
     GCAdapter::GCPadStatus pad;
     auto& queue = adapter->GetPadQueue();
-    for (std::size_t port = 0; port < queue.size(); ++port) {
-        while (queue[port].Pop(pad)) {
-            // This while loop will break on the earliest detected button
-            params.Set("engine", "gcpad");
-            params.Set("port", static_cast<int>(port));
-            for (const auto& button : GCAdapter::PadButtonArray) {
-                const u16 button_value = static_cast<u16>(button);
-                if (pad.button & button_value) {
-                    params.Set("button", button_value);
-                    break;
-                }
-            }
+    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::PAD_STICK));
-                if (pad.axis_value > 128) {
-                    params.Set("direction", "+");
-                    params.Set("threshold", "0.25");
-                } else {
-                    params.Set("direction", "-");
-                    params.Set("threshold", "-0.25");
-                }
-                break;
+        // 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;
@@ -152,17 +151,14 @@ public:
     explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_,
                       const GCAdapter::Adapter* adapter, float range_)
         : port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter),
-          origin_value_x(static_cast<float>(adapter->GetOriginValue(port_, axis_x_))),
-          origin_value_y(static_cast<float>(adapter->GetOriginValue(port_, axis_y_))),
           range(range_) {}
 
     float GetAxis(u32 axis) const {
         if (gcadapter->DeviceConnected(port)) {
             std::lock_guard lock{mutex};
-            const auto origin_value = axis % 2 == 0 ? origin_value_x : origin_value_y;
             const auto axis_value =
-                static_cast<float>(gcadapter->GetPadState()[port].axes.at(axis));
-            return (axis_value - origin_value) / (100.0f * range);
+                static_cast<float>(gcadapter->GetPadState(port).axis_values.at(axis));
+            return (axis_value) / (100.0f * range);
         }
         return 0.0f;
     }
@@ -215,8 +211,6 @@ private:
     const u32 axis_y;
     const float deadzone;
     const GCAdapter::Adapter* gcadapter;
-    const float origin_value_x;
-    const float origin_value_y;
     const float range;
     mutable std::mutex mutex;
 };
@@ -254,26 +248,44 @@ void GCAnalogFactory::EndConfiguration() {
 
 Common::ParamPackage GCAnalogFactory::GetNextInput() {
     GCAdapter::GCPadStatus pad;
+    Common::ParamPackage params;
     auto& queue = adapter->GetPadQueue();
-    for (std::size_t port = 0; port < queue.size(); ++port) {
-        while (queue[port].Pop(pad)) {
-            if (pad.axis == GCAdapter::PadAxes::Undefined ||
-                std::abs((static_cast<float>(pad.axis_value) - 128.0f) / 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 (analog_x_axis == -1) {
-                analog_x_axis = axis;
-                controller_number = static_cast<int>(port);
-            } else if (analog_y_axis == -1 && analog_x_axis != axis &&
-                       controller_number == static_cast<int>(port)) {
-                analog_y_axis = axis;
-            }
+    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;
         }
     }
-    Common::ParamPackage params;
     if (analog_x_axis != -1 && analog_y_axis != -1) {
         params.Set("engine", "gcpad");
         params.Set("port", controller_number);