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#include "ftnoir_tracker_libevdev.h"
#include "facetracknoir/plugin-support.h"
#include <algorithm>
#include <QDir>
#include <QDebug>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string>
static const int ot_libevdev_joystick_axes[6] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
FTNoIR_Tracker::FTNoIR_Tracker() : node(nullptr), success(false)
{
}
FTNoIR_Tracker::~FTNoIR_Tracker()
{
if (node)
libevdev_free(node);
if (fd != -1)
close(fd);
}
void FTNoIR_Tracker::StartTracker(QFrame*)
{
QString node_name = s.device_name;
std::string str = (QString("/dev/input/by-id/") + node_name).toStdString();
const char* filename = str.c_str();
fd = open(filename, O_NONBLOCK, O_RDWR);
if (fd == -1)
{
qDebug() << "error opening" << filename;
return;
}
int ret = libevdev_new_from_fd(fd, &node);
if (ret)
{
qDebug() << "libevdev open error" << ret;
return;
}
for (int i = 0; i < 6; i++)
{
// no error checking here, errors result in SIGFPE
a_min[i] = libevdev_get_abs_minimum(node, ot_libevdev_joystick_axes[i]);
a_max[i] = libevdev_get_abs_maximum(node, ot_libevdev_joystick_axes[i]);
qDebug() << "axis limits" << i << a_min[i] << "->" << a_max[i];
}
success = true;
}
void FTNoIR_Tracker::GetHeadPoseData(double *data)
{
if (node)
{
while (libevdev_has_event_pending(node) == 1)
{
struct input_event ev;
int status = libevdev_next_event(node, LIBEVDEV_READ_FLAG_NORMAL, &ev);
if (status != LIBEVDEV_READ_STATUS_SUCCESS)
continue;
if (ev.type == EV_ABS)
{
const int val = ev.value, code = ev.code;
for (int i = 0; i < 6; i++)
{
if (ot_libevdev_joystick_axes[i] == code)
{
data[i] = (val - a_min[i])*(i >= Yaw ? 180. : 100.) / a_max[i] - a_min[i];
break;
}
}
}
}
}
}
extern "C" OPENTRACK_EXPORT ITracker* GetConstructor()
{
return new FTNoIR_Tracker;
}
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