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remove dependancy on libevdev

This commit is contained in:
hondres 2016-01-26 23:04:57 +01:00
parent 31d441f409
commit 29353808f0
3 changed files with 135 additions and 105 deletions
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10
platform/x11/detect.py
View File

@ -158,18 +158,14 @@ def configure(env):
if (env["gamepad"]=="yes" and platform.system() == "Linux"):
# pkg-config returns 0 when the lib exists...
found_udev = not os.system("pkg-config --exists libudev")
found_evdev = not os.system("pkg-config --exists libevdev")
if (found_udev and found_evdev):
print("Enabling gamepad support with udev/evdev")
if (found_udev):
print("Enabling gamepad support with udev")
env.Append(CPPFLAGS=["-DJOYDEV_ENABLED"])
env.ParseConfig('pkg-config libudev --cflags --libs')
env.ParseConfig('pkg-config libevdev --cflags --libs')
else:
if (not found_udev):
print("libudev development libraries not found")
if (not found_evdev):
print("libevdev development libraries not found")
print("Some libraries are missing for the required gamepad support, aborting!")
print("Install the mentioned libraries or build with 'gamepad=no' to disable gamepad support.")
sys.exit(255)

131
platform/x11/joystick_linux.cpp
View File

@ -31,22 +31,34 @@
#ifdef JOYDEV_ENABLED
#include "joystick_linux.h"
#include "print_string.h"
#include <libevdev/libevdev.h>
#include <linux/input.h>
#include <libudev.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <cstring>
#define test_bit(nr, addr) (((1UL << ((nr) % (sizeof(long) * 8))) & ((addr)[(nr) / (sizeof(long) * 8)])) != 0)
#define NBITS(x) ((((x)-1)/(sizeof(long) * 8))+1)
static const char* ignore_str = "/dev/input/js";
joystick_linux::Joystick::Joystick() {
fd = -1;
dpad = 0;
dev = NULL;
devpath = "";
for (int i = 0; i < MAX_ABS; i++) {
abs_info[i] = NULL;
}
}
joystick_linux::Joystick::~Joystick() {
for (int i = 0; i < MAX_ABS; i++) {
if (abs_info[i]) {
memdelete(abs_info[i]);
}
}
}
void joystick_linux::Joystick::reset() {
@ -112,11 +124,15 @@ void joystick_linux::enumerate_joysticks(udev *p_udev) {
dev = udev_device_new_from_syspath(p_udev, path);
const char* devnode = udev_device_get_devnode(dev);
if (devnode != NULL && strstr(devnode, ignore_str) == NULL) {
if (devnode) {
String devnode_str = devnode;
if (devnode_str.find(ignore_str) == -1) {
joy_mutex->lock();
open_joystick(devnode);
joy_mutex->unlock();
}
}
udev_device_unref(dev);
}
udev_enumerate_unref(enumerate);
@ -152,17 +168,19 @@ void joystick_linux::monitor_joysticks(udev *p_udev) {
if (dev && udev_device_get_devnode(dev) != 0) {
joy_mutex->lock();
const char* action = udev_device_get_action(dev);
String action = udev_device_get_action(dev);
const char* devnode = udev_device_get_devnode(dev);
if (devnode) {
if (strstr(devnode, ignore_str) == NULL) {
String devnode_str = devnode;
if (devnode_str.find(ignore_str) == -1) {
if (strcmp(action, "add") == 0)
if (action == "add")
open_joystick(devnode);
else if (strcmp(action, "remove") == 0)
else if (String(action) == "remove")
close_joystick(get_joy_from_path(devnode));
}
}
udev_device_unref(dev);
joy_mutex->unlock();
@ -208,7 +226,6 @@ void joystick_linux::close_joystick(int p_id) {
if (joy.fd != -1) {
libevdev_free(joy.dev);
close(joy.fd);
joy.fd = -1;
input->joy_connection_changed(p_id, false, "");
@ -230,21 +247,27 @@ static String _hex_str(uint8_t p_byte) {
void joystick_linux::setup_joystick_properties(int p_id) {
Joystick* joy = &joysticks[p_id];
libevdev* dev = joy->dev;
unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
int num_buttons = 0;
int num_axes = 0;
if ((ioctl(joy->fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
(ioctl(joy->fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0)) {
return;
}
for (int i = BTN_JOYSTICK; i < KEY_MAX; ++i) {
if (libevdev_has_event_code(dev, EV_KEY, i)) {
if (test_bit(i, keybit)) {
joy->key_map[i] = num_buttons++;
}
}
for (int i = BTN_MISC; i < BTN_JOYSTICK; ++i) {
if (libevdev_has_event_code(dev, EV_KEY, i)) {
if (test_bit(i, keybit)) {
joy->key_map[i] = num_buttons++;
}
@ -255,39 +278,56 @@ void joystick_linux::setup_joystick_properties(int p_id) {
i = ABS_HAT3Y;
continue;
}
if (libevdev_has_event_code(dev, EV_ABS, i)) {
if (test_bit(i, absbit)) {
joy->abs_map[i] = num_axes++;
joy->abs_info[i] = memnew(input_absinfo);
if (ioctl(joy->fd, EVIOCGABS(i), joy->abs_info[i]) < 0) {
memdelete(joy->abs_info[i]);
joy->abs_info[i] = NULL;
}
}
}
}
void joystick_linux::open_joystick(const char *p_path) {
int joy_num = get_free_joy_slot();
int fd = open(p_path, O_RDONLY | O_NONBLOCK);
if (fd != -1 && joy_num != -1) {
int rc = libevdev_new_from_fd(fd, &joysticks[joy_num].dev);
if (rc < 0) {
unsigned long evbit[NBITS(EV_MAX)] = { 0 };
unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
fprintf(stderr, "Failed to init libevdev (%s)\n", strerror(-rc));
if ((ioctl(fd, EVIOCGBIT(0, sizeof(evbit)), evbit) < 0) ||
(ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0)) {
return;
}
libevdev *dev = joysticks[joy_num].dev;
//check if the device supports basic gamepad events, prevents certain keyboards from
//being detected as joysticks
if (libevdev_has_event_type(dev, EV_ABS) && libevdev_has_event_type(dev, EV_KEY) &&
(libevdev_has_event_code(dev, EV_KEY, BTN_A) || libevdev_has_event_code(dev, EV_KEY, BTN_THUMBL) || libevdev_has_event_code(dev, EV_KEY, BTN_TOP))) {
if (!(test_bit(EV_KEY, evbit) && test_bit(EV_ABS, evbit) &&
((test_bit(ABS_X, absbit) || test_bit(ABS_Y, absbit)) ||
(test_bit(BTN_A, keybit) || test_bit(BTN_THUMBL, keybit))))) {
close(fd);
return;
}
char uid[128];
String name = libevdev_get_name(dev);
uint16_t bus = __bswap_16(libevdev_get_id_bustype(dev));
uint16_t vendor = __bswap_16(libevdev_get_id_vendor(dev));
uint16_t product = __bswap_16(libevdev_get_id_product(dev));
uint16_t version = __bswap_16(libevdev_get_id_version(dev));
char namebuf[128];
String name = "";
input_id inpid;
if (ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) >= 0) {
name = namebuf;
}
if (ioctl(fd, EVIOCGID, &inpid) < 0) {
close(fd);
return;
}
joysticks[joy_num].reset();
@ -295,8 +335,12 @@ void joystick_linux::open_joystick(const char *p_path) {
joy.fd = fd;
joy.devpath = String(p_path);
setup_joystick_properties(joy_num);
sprintf(uid, "%04x%04x", bus, 0);
if (vendor && product && version) {
sprintf(uid, "%04x%04x", __bswap_16(inpid.bustype), 0);
if (inpid.vendor && inpid.product && inpid.version) {
uint16_t vendor = __bswap_16(inpid.vendor);
uint16_t product = __bswap_16(inpid.product);
uint16_t version = __bswap_16(inpid.version);
sprintf(uid + String(uid).length(), "%04x%04x%04x%04x%04x%04x", vendor,0,product,0,version,0);
input->joy_connection_changed(joy_num, true, name, uid);
@ -310,13 +354,6 @@ void joystick_linux::open_joystick(const char *p_path) {
}
uidname += "00";
input->joy_connection_changed(joy_num, true, name, uidname);
}
}
else {
//device is not a gamepad, clean up
libevdev_free(dev);
close(fd);
}
}
}
@ -350,19 +387,16 @@ uint32_t joystick_linux::process_joysticks(uint32_t p_event_id) {
if (joysticks[i].fd == -1) continue;
input_event ev;
input_event events[32];
Joystick* joy = &joysticks[i];
libevdev* dev = joy->dev;
int rc = 1;
rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_NORMAL, &ev);
int len;
if (rc < 0 && rc != -EAGAIN) {
continue;
}
while (rc == LIBEVDEV_READ_STATUS_SYNC || rc == LIBEVDEV_READ_STATUS_SUCCESS) {
while ((len = read(joy->fd, events, (sizeof events))) > 0) {
len /= sizeof(events[0]);
for (int j = 0; j < len; j++) {
input_event &ev = events[j];
switch (ev.type) {
case EV_KEY:
p_event_id = input->joy_button(p_event_id, i, joy->key_map[ev.code], ev.value);
@ -375,7 +409,6 @@ uint32_t joystick_linux::process_joysticks(uint32_t p_event_id) {
if (ev.value != 0) {
if (ev.value < 0) joy->dpad |= InputDefault::HAT_MASK_LEFT;
else joy->dpad |= InputDefault::HAT_MASK_RIGHT;
}
else joy->dpad &= ~(InputDefault::HAT_MASK_LEFT | InputDefault::HAT_MASK_RIGHT);
@ -393,15 +426,15 @@ uint32_t joystick_linux::process_joysticks(uint32_t p_event_id) {
break;
default:
if (joy->abs_map[ev.code] != -1) {
InputDefault::JoyAxis value = axis_correct(libevdev_get_abs_info(dev, ev.code), ev.value);
if (joy->abs_map[ev.code] != -1 && joy->abs_info[ev.code]) {
InputDefault::JoyAxis value = axis_correct(joy->abs_info[ev.code], ev.value);
joy->curr_axis[joy->abs_map[ev.code]] = value;
}
break;
}
break;
}
rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_NORMAL, &ev);
}
}
for (int j = 0; j < MAX_ABS; j++) {
int index = joy->abs_map[j];

3
platform/x11/joystick_linux.h
View File

@ -61,9 +61,10 @@ private:
int fd;
String devpath;
struct libevdev *dev;
input_absinfo *abs_info[MAX_ABS];
Joystick();
~Joystick();
void reset();
};