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yuzu/src/input_common/gcadapter/gc_adapter.cpp

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// Copyright 2014 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <chrono>
#include <thread>
#include "common/logging/log.h"
#include "input_common/gcadapter/gc_adapter.h"
namespace GCAdapter {
Adapter::Adapter() {
if (usb_adapter_handle != nullptr) {
return;
}
LOG_INFO(Input, "GC Adapter Initialization started");
current_status = NO_ADAPTER_DETECTED;
libusb_init(&libusb_ctx);
StartScanThread();
}
GCPadStatus Adapter::CheckStatus(int port, const std::array<u8, 37>& adapter_payload) {
GCPadStatus pad = {};
bool get_origin = false;
ControllerTypes type = ControllerTypes(adapter_payload[1 + (9 * port)] >> 4);
if (type != ControllerTypes::None)
get_origin = true;
adapter_controllers_status[port] = type;
if (adapter_controllers_status[port] != ControllerTypes::None) {
u8 b1 = adapter_payload[1 + (9 * port) + 1];
u8 b2 = adapter_payload[1 + (9 * port) + 2];
if (b1 & (1 << 0)) {
pad.button |= PAD_BUTTON_A;
}
if (b1 & (1 << 1)) {
pad.button |= PAD_BUTTON_B;
}
if (b1 & (1 << 2)) {
pad.button |= PAD_BUTTON_X;
}
if (b1 & (1 << 3)) {
pad.button |= PAD_BUTTON_Y;
}
if (b1 & (1 << 4)) {
pad.button |= PAD_BUTTON_LEFT;
}
if (b1 & (1 << 5)) {
pad.button |= PAD_BUTTON_RIGHT;
}
if (b1 & (1 << 6)) {
pad.button |= PAD_BUTTON_DOWN;
}
if (b1 & (1 << 7)) {
pad.button |= PAD_BUTTON_UP;
}
if (b2 & (1 << 0)) {
pad.button |= PAD_BUTTON_START;
}
if (b2 & (1 << 1)) {
pad.button |= PAD_TRIGGER_Z;
}
if (b2 & (1 << 2)) {
pad.button |= PAD_TRIGGER_R;
}
if (b2 & (1 << 3)) {
pad.button |= PAD_TRIGGER_L;
}
if (get_origin) {
pad.button |= PAD_GET_ORIGIN;
}
pad.stick_x = adapter_payload[1 + (9 * port) + 3];
pad.stick_y = adapter_payload[1 + (9 * port) + 4];
pad.substick_x = adapter_payload[1 + (9 * port) + 5];
pad.substick_y = adapter_payload[1 + (9 * port) + 6];
pad.trigger_left = adapter_payload[1 + (9 * port) + 7];
pad.trigger_right = adapter_payload[1 + (9 * port) + 8];
}
return pad;
}
void Adapter::PadToState(const GCPadStatus& pad, GCState& state) {
state.buttons.insert_or_assign(PAD_BUTTON_A, pad.button & PAD_BUTTON_A);
state.buttons.insert_or_assign(PAD_BUTTON_B, pad.button & PAD_BUTTON_B);
state.buttons.insert_or_assign(PAD_BUTTON_X, pad.button & PAD_BUTTON_X);
state.buttons.insert_or_assign(PAD_BUTTON_Y, pad.button & PAD_BUTTON_Y);
state.buttons.insert_or_assign(PAD_BUTTON_LEFT, pad.button & PAD_BUTTON_LEFT);
state.buttons.insert_or_assign(PAD_BUTTON_RIGHT, pad.button & PAD_BUTTON_RIGHT);
state.buttons.insert_or_assign(PAD_BUTTON_DOWN, pad.button & PAD_BUTTON_DOWN);
state.buttons.insert_or_assign(PAD_BUTTON_UP, pad.button & PAD_BUTTON_UP);
state.buttons.insert_or_assign(PAD_BUTTON_START, pad.button & PAD_BUTTON_START);
state.buttons.insert_or_assign(PAD_TRIGGER_Z, pad.button & PAD_TRIGGER_Z);
state.buttons.insert_or_assign(PAD_TRIGGER_L, pad.button & PAD_TRIGGER_L);
state.buttons.insert_or_assign(PAD_TRIGGER_R, pad.button & PAD_TRIGGER_R);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::StickX), pad.stick_x);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::StickY), pad.stick_y);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::SubstickX), pad.substick_x);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::SubstickY), pad.substick_y);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::TriggerLeft), pad.trigger_left);
state.axes.insert_or_assign(static_cast<u8>(PadAxes::TriggerRight), pad.trigger_right);
}
void Adapter::Read() {
LOG_INFO(Input, "GC Adapter Read() thread started");
int payload_size_in, payload_size;
std::array<u8, 37> adapter_payload;
std::array<u8, 37> controller_payload_copy;
std::array<GCPadStatus, 4> pad;
while (adapter_thread_running) {
libusb_interrupt_transfer(usb_adapter_handle, input_endpoint, adapter_payload.data(),
sizeof(adapter_payload), &payload_size_in, 32);
payload_size = 0;
{
std::lock_guard<std::mutex> lk(s_mutex);
std::copy(std::begin(adapter_payload), std::end(adapter_payload),
std::begin(controller_payload_copy));
payload_size = payload_size_in;
}
if (payload_size != sizeof(controller_payload_copy) ||
controller_payload_copy[0] != LIBUSB_DT_HID) {
LOG_ERROR(Input, "error reading payload (size: %d, type: %02x)", payload_size,
controller_payload_copy[0]);
} else {
for (int port = 0; port < 4; port++) {
pad[port] = CheckStatus(port, controller_payload_copy);
}
}
for (int port = 0; port < 4; port++) {
if (DeviceConnected(port) && configuring) {
if (pad[port].button != PAD_GET_ORIGIN) {
pad_queue[port].Push(pad[port]);
}
// Accounting for a threshold here because of some controller variance
if (pad[port].stick_x > pad[port].MAIN_STICK_CENTER_X + pad[port].THRESHOLD ||
pad[port].stick_x < pad[port].MAIN_STICK_CENTER_X - pad[port].THRESHOLD) {
pad[port].axis = GCAdapter::PadAxes::StickX;
pad[port].axis_value = pad[port].stick_x;
pad_queue[port].Push(pad[port]);
}
if (pad[port].stick_y > pad[port].MAIN_STICK_CENTER_Y + pad[port].THRESHOLD ||
pad[port].stick_y < pad[port].MAIN_STICK_CENTER_Y - pad[port].THRESHOLD) {
pad[port].axis = GCAdapter::PadAxes::StickY;
pad[port].axis_value = pad[port].stick_y;
pad_queue[port].Push(pad[port]);
}
if (pad[port].substick_x > pad[port].C_STICK_CENTER_X + pad[port].THRESHOLD ||
pad[port].substick_x < pad[port].C_STICK_CENTER_X - pad[port].THRESHOLD) {
pad[port].axis = GCAdapter::PadAxes::SubstickX;
pad[port].axis_value = pad[port].substick_x;
pad_queue[port].Push(pad[port]);
}
if (pad[port].substick_y > pad[port].C_STICK_CENTER_Y + pad[port].THRESHOLD ||
pad[port].substick_y < pad[port].C_STICK_CENTER_Y - pad[port].THRESHOLD) {
pad[port].axis = GCAdapter::PadAxes::SubstickY;
pad[port].axis_value = pad[port].substick_y;
pad_queue[port].Push(pad[port]);
}
}
PadToState(pad[port], state[port]);
}
std::this_thread::yield();
}
}
void Adapter::ScanThreadFunc() {
LOG_INFO(Input, "GC Adapter scanning thread started");
while (detect_thread_running) {
if (usb_adapter_handle == nullptr) {
std::lock_guard<std::mutex> lk(initialization_mutex);
Setup();
}
std::this_thread::sleep_for(std::chrono::milliseconds(500));
}
}
void Adapter::StartScanThread() {
if (detect_thread_running) {
return;
}
if (!libusb_ctx) {
return;
}
detect_thread_running = true;
detect_thread = std::thread([=] { ScanThreadFunc(); });
}
void Adapter::StopScanThread() {
detect_thread.join();
}
void Adapter::Setup() {
// Reset the error status in case the adapter gets unplugged
if (current_status < 0) {
current_status = NO_ADAPTER_DETECTED;
}
adapter_controllers_status.fill(ControllerTypes::None);
libusb_device** devs; // pointer to list of connected usb devices
int cnt = libusb_get_device_list(libusb_ctx, &devs); // get the list of devices
for (int i = 0; i < cnt; i++) {
if (CheckDeviceAccess(devs[i])) {
// GC Adapter found, registering it
GetGCEndpoint(devs[i]);
break;
}
}
}
bool Adapter::CheckDeviceAccess(libusb_device* device) {
libusb_device_descriptor desc;
int ret = libusb_get_device_descriptor(device, &desc);
if (ret) {
// could not acquire the descriptor, no point in trying to use it.
LOG_ERROR(Input, "libusb_get_device_descriptor failed with error: %d", ret);
return false;
}
if (desc.idVendor != 0x057e || desc.idProduct != 0x0337) {
// This isn<73>t the device we are looking for.
return false;
}
ret = libusb_open(device, &usb_adapter_handle);
if (ret == LIBUSB_ERROR_ACCESS) {
LOG_ERROR(Input, "Yuzu can not gain access to this device: ID %04X:%04X.", desc.idVendor,
desc.idProduct);
return false;
}
if (ret) {
LOG_ERROR(Input, "libusb_open failed to open device with error = %d", ret);
return false;
}
ret = libusb_kernel_driver_active(usb_adapter_handle, 0);
if (ret == 1) {
ret = libusb_detach_kernel_driver(usb_adapter_handle, 0);
if (ret != 0 && ret != LIBUSB_ERROR_NOT_SUPPORTED) {
LOG_ERROR(Input, "libusb_detach_kernel_driver failed with error = %d", ret);
}
}
if (ret != 0 && ret != LIBUSB_ERROR_NOT_SUPPORTED) {
libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
return false;
}
ret = libusb_claim_interface(usb_adapter_handle, 0);
if (ret) {
LOG_ERROR(Input, "libusb_claim_interface failed with error = %d", ret);
libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
return false;
}
return true;
}
void Adapter::GetGCEndpoint(libusb_device* device) {
libusb_config_descriptor* config = nullptr;
libusb_get_config_descriptor(device, 0, &config);
for (u8 ic = 0; ic < config->bNumInterfaces; ic++) {
const libusb_interface* interfaceContainer = &config->interface[ic];
for (int i = 0; i < interfaceContainer->num_altsetting; i++) {
const libusb_interface_descriptor* interface = &interfaceContainer->altsetting[i];
for (u8 e = 0; e < interface->bNumEndpoints; e++) {
const libusb_endpoint_descriptor* endpoint = &interface->endpoint[e];
if (endpoint->bEndpointAddress & LIBUSB_ENDPOINT_IN) {
input_endpoint = endpoint->bEndpointAddress;
}
}
}
}
adapter_thread_running = true;
current_status = ADAPTER_DETECTED;
adapter_input_thread = std::thread([=] { Read(); }); // Read input
}
Adapter::~Adapter() {
StopScanThread();
Reset();
current_status = NO_ADAPTER_DETECTED;
}
void Adapter::Reset() {
std::unique_lock<std::mutex> lock(initialization_mutex, std::defer_lock);
if (!lock.try_lock()) {
return;
}
if (current_status != ADAPTER_DETECTED) {
return;
}
if (adapter_thread_running) {
adapter_input_thread.join();
}
adapter_controllers_status.fill(ControllerTypes::None);
current_status = NO_ADAPTER_DETECTED;
if (usb_adapter_handle) {
libusb_release_interface(usb_adapter_handle, 0);
libusb_close(usb_adapter_handle);
usb_adapter_handle = nullptr;
}
}
bool Adapter::DeviceConnected(int port) {
return adapter_controllers_status[port] != ControllerTypes::None;
}
void Adapter::ResetDeviceType(int port) {
adapter_controllers_status[port] = ControllerTypes::None;
}
void Adapter::BeginConfiguration() {
for (auto& pq : pad_queue) {
pq.Clear();
}
configuring = true;
}
void Adapter::EndConfiguration() {
for (auto& pq : pad_queue) {
pq.Clear();
}
configuring = false;
}
std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() {
return pad_queue;
}
const std::array<Common::SPSCQueue<GCPadStatus>, 4>& Adapter::GetPadQueue() const {
return pad_queue;
}
std::array<GCState, 4>& Adapter::GetPadState() {
return state;
}
const std::array<GCState, 4>& Adapter::GetPadState() const {
return state;
}
} // namespace GCAdapter
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