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Mesen/Linux/LinuxGameController.cpp

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#include "../Core/MessageManager.h"
#include "../Core/Console.h"
#include "../Core/EmulationSettings.h"
#include "LinuxGameController.h"
#include <libevdev/libevdev.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <iostream>
std::shared_ptr<LinuxGameController> LinuxGameController::GetController(shared_ptr<Console> console, int deviceID, bool logInformation)
{
std::string deviceName = "/dev/input/event" + std::to_string(deviceID);
struct stat buffer;
if(stat(deviceName.c_str(), &buffer) == 0) {
int fd = open(deviceName.c_str(), O_RDONLY | O_NONBLOCK);
if(fd < 0) {
if(logInformation) {
MessageManager::Log("[Input] " + deviceName + " error: " + std::to_string(errno) + " " + strerror(errno));
}
return nullptr;
}
libevdev* device = nullptr;
int rc = libevdev_new_from_fd(fd, &device);
if(rc < 0) {
if(logInformation) {
MessageManager::Log("[Input] " + deviceName + " error: " + std::to_string(errno) + " " + strerror(errno));
}
close(fd);
return nullptr;
}
if((libevdev_has_event_type(device, EV_KEY) && libevdev_has_event_code(device, EV_KEY, BTN_GAMEPAD)) ||
(libevdev_has_event_type(device, EV_ABS) && libevdev_has_event_code(device, EV_ABS, ABS_X))) {
MessageManager::Log(std::string("[Input Connected] Name: ") + libevdev_get_name(device) + " Vendor: " + std::to_string(libevdev_get_id_vendor(device)) + " Product: " + std::to_string(libevdev_get_id_product(device)));
return std::shared_ptr<LinuxGameController>(new LinuxGameController(console, deviceID, fd, device));
} else {
MessageManager::Log(std::string("[Input] Device ignored (Not a gamepad) - Name: ") + libevdev_get_name(device) + " Vendor: " + std::to_string(libevdev_get_id_vendor(device)) + " Product: " + std::to_string(libevdev_get_id_product(device)));
close(fd);
}
}
return nullptr;
}
LinuxGameController::LinuxGameController(shared_ptr<Console> console, int deviceID, int fileDescriptor, libevdev* device)
{
_console = console;
_deviceID = deviceID;
_stopFlag = false;
_device = device;
_fd = fileDescriptor;
memset(_axisDefaultValue, 0, sizeof(_axisDefaultValue));
_eventThread = std::thread([=]() {
int rc;
bool calibrate = true;
do {
fd_set readSet;
FD_ZERO(&readSet);
FD_SET(_fd, &readSet);
//Timeout after 0.1 seconds (to allow thread to be terminated quickly)
timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 100000;
rc = select((int)_fd+1, &readSet, nullptr, nullptr, &timeout);
if(rc) {
do {
struct input_event ev;
rc = libevdev_next_event(_device, LIBEVDEV_READ_FLAG_NORMAL, &ev);
if(rc == LIBEVDEV_READ_STATUS_SYNC) {
while (rc == LIBEVDEV_READ_STATUS_SYNC) {
rc = libevdev_next_event(_device, LIBEVDEV_READ_FLAG_SYNC, &ev);
}
} else if(rc == LIBEVDEV_READ_STATUS_SUCCESS) {
//print_event(&ev);
}
} while(rc == LIBEVDEV_READ_STATUS_SYNC || rc == LIBEVDEV_READ_STATUS_SUCCESS);
}
if(rc != LIBEVDEV_READ_STATUS_SYNC && rc != LIBEVDEV_READ_STATUS_SUCCESS && rc != -EAGAIN && rc != EWOULDBLOCK) {
//Device was disconnected
MessageManager::Log("[Input Device] Disconnected");
break;
}
if(calibrate) {
std::this_thread::sleep_for(std::chrono::duration<int, std::milli>(100));
Calibrate();
calibrate = false;
}
} while(!_stopFlag);
_disconnected = true;
});
}
LinuxGameController::~LinuxGameController()
{
_stopFlag = true;
_eventThread.join();
libevdev_free(_device);
close(_fd);
}
void LinuxGameController::Calibrate()
{
int axes[14] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y, ABS_HAT3X, ABS_HAT3Y };
for(int axis : axes) {
_axisDefaultValue[axis] = libevdev_get_event_value(_device, EV_ABS, axis);
//std::cout << "center values: " << std::to_string(_axisDefaultValue[axis]) << std::endl;
}
}
bool LinuxGameController::CheckAxis(unsigned int code, bool forPositive)
{
double deadZoneRatio = _console->GetSettings()->GetControllerDeadzoneRatio();
int deadZoneNegative = (_axisDefaultValue[code] - libevdev_get_abs_minimum(_device, code)) * 0.400 * deadZoneRatio;
int deadZonePositive = (libevdev_get_abs_maximum(_device, code) - _axisDefaultValue[code]) * 0.400 * deadZoneRatio;
if(forPositive) {
return libevdev_get_event_value(_device, EV_ABS, code) - _axisDefaultValue[code] > deadZonePositive;
} else {
return libevdev_get_event_value(_device, EV_ABS, code) - _axisDefaultValue[code] < -deadZoneNegative;
}
}
bool LinuxGameController::IsButtonPressed(int buttonNumber)
{
switch(buttonNumber) {
case 0: return libevdev_get_event_value(_device, EV_KEY, BTN_A) == 1;
case 1: return libevdev_get_event_value(_device, EV_KEY, BTN_B) == 1;
case 2: return libevdev_get_event_value(_device, EV_KEY, BTN_C) == 1;
case 3: return libevdev_get_event_value(_device, EV_KEY, BTN_X) == 1;
case 4: return libevdev_get_event_value(_device, EV_KEY, BTN_Y) == 1;
case 5: return libevdev_get_event_value(_device, EV_KEY, BTN_Z) == 1;
case 6: return libevdev_get_event_value(_device, EV_KEY, BTN_TL) == 1;
case 7: return libevdev_get_event_value(_device, EV_KEY, BTN_TR) == 1;
case 8: return libevdev_get_event_value(_device, EV_KEY, BTN_TL2) == 1;
case 9: return libevdev_get_event_value(_device, EV_KEY, BTN_TR2) == 1;
case 10: return libevdev_get_event_value(_device, EV_KEY, BTN_SELECT) == 1;
case 11: return libevdev_get_event_value(_device, EV_KEY, BTN_START) == 1;
case 12: return libevdev_get_event_value(_device, EV_KEY, BTN_THUMBL) == 1;
case 13: return libevdev_get_event_value(_device, EV_KEY, BTN_THUMBR) == 1;
case 14: return CheckAxis(ABS_X, true);
case 15: return CheckAxis(ABS_X, false);
case 16: return CheckAxis(ABS_Y, true);
case 17: return CheckAxis(ABS_Y, false);
case 18: return CheckAxis(ABS_Z, true);
case 19: return CheckAxis(ABS_Z, false);
case 20: return CheckAxis(ABS_RX, true);
case 21: return CheckAxis(ABS_RX, false);
case 22: return CheckAxis(ABS_RY, true);
case 23: return CheckAxis(ABS_RY, false);
case 24: return CheckAxis(ABS_RZ, true);
case 25: return CheckAxis(ABS_RZ, false);
case 26: return CheckAxis(ABS_HAT0X, true);
case 27: return CheckAxis(ABS_HAT0X, false);
case 28: return CheckAxis(ABS_HAT0Y, true);
case 29: return CheckAxis(ABS_HAT0Y, false);
case 30: return CheckAxis(ABS_HAT1X, true);
case 31: return CheckAxis(ABS_HAT1X, false);
case 32: return CheckAxis(ABS_HAT1Y, true);
case 33: return CheckAxis(ABS_HAT1Y, false);
case 34: return CheckAxis(ABS_HAT2X, true);
case 35: return CheckAxis(ABS_HAT2X, false);
case 36: return CheckAxis(ABS_HAT2Y, true);
case 37: return CheckAxis(ABS_HAT2Y, false);
case 38: return CheckAxis(ABS_HAT3X, true);
case 39: return CheckAxis(ABS_HAT3X, false);
case 40: return CheckAxis(ABS_HAT3Y, true);
case 41: return CheckAxis(ABS_HAT3Y, false);
case 42: return libevdev_get_event_value(_device, EV_KEY, BTN_TRIGGER) == 1;
case 43: return libevdev_get_event_value(_device, EV_KEY, BTN_THUMB) == 1;
case 44: return libevdev_get_event_value(_device, EV_KEY, BTN_THUMB2) == 1;
case 45: return libevdev_get_event_value(_device, EV_KEY, BTN_TOP) == 1;
case 46: return libevdev_get_event_value(_device, EV_KEY, BTN_TOP2) == 1;
case 47: return libevdev_get_event_value(_device, EV_KEY, BTN_PINKIE) == 1;
case 48: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE) == 1;
case 49: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE2) == 1;
case 50: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE3) == 1;
case 51: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE4) == 1;
case 52: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE5) == 1;
case 53: return libevdev_get_event_value(_device, EV_KEY, BTN_BASE6) == 1;
case 54: return libevdev_get_event_value(_device, EV_KEY, BTN_DEAD) == 1;
}
return false;
}
bool LinuxGameController::IsDisconnected()
{
return _disconnected;
}
int LinuxGameController::GetDeviceID()
{
return _deviceID;
}
/*
static int print_event(struct input_event *ev)
{
if (ev->type == EV_SYN)
printf("Event: time %ld.%06ld, ++++++++++++++++++++ %s +++++++++++++++\n",
ev->time.tv_sec,
ev->time.tv_usec,
libevdev_event_type_get_name(ev->type));
else
printf("Event: time %ld.%06ld, type %d (%s), code %d (%s), value %d\n",
ev->time.tv_sec,
ev->time.tv_usec,
ev->type,
libevdev_event_type_get_name(ev->type),
ev->code,
libevdev_event_code_get_name(ev->type, ev->code),
ev->value);
return 0;
}
*/
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