1426cd3b3a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
557 lines
16 KiB
C++
557 lines
16 KiB
C++
/**************************************************************************/
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/* joypad_linux.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifdef JOYDEV_ENABLED
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#include "joypad_linux.h"
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/input.h>
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#include <unistd.h>
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#ifdef UDEV_ENABLED
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#include "libudev-so_wrap.h"
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#endif
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#define LONG_BITS (sizeof(long) * 8)
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#define test_bit(nr, addr) (((1UL << ((nr) % LONG_BITS)) & ((addr)[(nr) / LONG_BITS])) != 0)
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#define NBITS(x) ((((x)-1) / LONG_BITS) + 1)
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#ifdef UDEV_ENABLED
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static const char *ignore_str = "/dev/input/js";
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#endif
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JoypadLinux::Joypad::Joypad() {
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fd = -1;
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dpad = 0;
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devpath = "";
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for (int i = 0; i < MAX_ABS; i++) {
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abs_info[i] = nullptr;
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}
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}
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JoypadLinux::Joypad::~Joypad() {
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for (int i = 0; i < MAX_ABS; i++) {
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if (abs_info[i]) {
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memdelete(abs_info[i]);
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}
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}
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}
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void JoypadLinux::Joypad::reset() {
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dpad = 0;
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fd = -1;
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for (int i = 0; i < MAX_ABS; i++) {
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abs_map[i] = -1;
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curr_axis[i] = 0;
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}
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events.clear();
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}
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JoypadLinux::JoypadLinux(InputDefault *in) {
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#ifdef UDEV_ENABLED
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use_udev = initialize_libudev() == 0;
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if (use_udev) {
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print_verbose("JoypadLinux: udev enabled and loaded successfully.");
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} else {
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print_verbose("JoypadLinux: udev enabled, but couldn't be loaded. Falling back to /dev/input to detect joypads.");
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}
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#else
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print_verbose("JoypadLinux: udev disabled, parsing /dev/input to detect joypads.");
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#endif
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input = in;
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monitor_joypads_thread.start(monitor_joypads_thread_func, this);
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joypad_events_thread.start(joypad_events_thread_func, this);
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}
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JoypadLinux::~JoypadLinux() {
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monitor_joypads_exit.set();
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joypad_events_exit.set();
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monitor_joypads_thread.wait_to_finish();
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joypad_events_thread.wait_to_finish();
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close_joypads();
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}
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void JoypadLinux::monitor_joypads_thread_func(void *p_user) {
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if (p_user) {
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JoypadLinux *joy = (JoypadLinux *)p_user;
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joy->monitor_joypads_thread_run();
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}
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}
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void JoypadLinux::monitor_joypads_thread_run() {
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#ifdef UDEV_ENABLED
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if (use_udev) {
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udev *_udev = udev_new();
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if (!_udev) {
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use_udev = false;
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ERR_PRINT("Failed getting an udev context, falling back to parsing /dev/input.");
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monitor_joypads();
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} else {
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enumerate_joypads(_udev);
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monitor_joypads(_udev);
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udev_unref(_udev);
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}
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} else {
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monitor_joypads();
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}
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#else
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monitor_joypads();
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#endif
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}
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#ifdef UDEV_ENABLED
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void JoypadLinux::enumerate_joypads(udev *p_udev) {
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udev_enumerate *enumerate;
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udev_list_entry *devices, *dev_list_entry;
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udev_device *dev;
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enumerate = udev_enumerate_new(p_udev);
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udev_enumerate_add_match_subsystem(enumerate, "input");
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udev_enumerate_scan_devices(enumerate);
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devices = udev_enumerate_get_list_entry(enumerate);
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udev_list_entry_foreach(dev_list_entry, devices) {
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const char *path = udev_list_entry_get_name(dev_list_entry);
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dev = udev_device_new_from_syspath(p_udev, path);
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const char *devnode = udev_device_get_devnode(dev);
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if (devnode) {
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String devnode_str = devnode;
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if (devnode_str.find(ignore_str) == -1) {
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open_joypad(devnode);
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}
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}
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udev_device_unref(dev);
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}
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udev_enumerate_unref(enumerate);
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}
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void JoypadLinux::monitor_joypads(udev *p_udev) {
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udev_device *dev = nullptr;
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udev_monitor *mon = udev_monitor_new_from_netlink(p_udev, "udev");
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udev_monitor_filter_add_match_subsystem_devtype(mon, "input", nullptr);
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udev_monitor_enable_receiving(mon);
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int fd = udev_monitor_get_fd(mon);
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while (!monitor_joypads_exit.is_set()) {
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fd_set fds;
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struct timeval tv;
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int ret;
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FD_ZERO(&fds);
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FD_SET(fd, &fds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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ret = select(fd + 1, &fds, nullptr, nullptr, &tv);
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/* Check if our file descriptor has received data. */
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if (ret > 0 && FD_ISSET(fd, &fds)) {
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/* Make the call to receive the device.
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select() ensured that this will not block. */
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dev = udev_monitor_receive_device(mon);
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if (dev && udev_device_get_devnode(dev) != nullptr) {
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String action = udev_device_get_action(dev);
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const char *devnode = udev_device_get_devnode(dev);
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if (devnode) {
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String devnode_str = devnode;
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if (devnode_str.find(ignore_str) == -1) {
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if (action == "add") {
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open_joypad(devnode);
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} else if (String(action) == "remove") {
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close_joypad(devnode);
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}
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}
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}
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udev_device_unref(dev);
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}
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}
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usleep(50000);
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}
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udev_monitor_unref(mon);
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}
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#endif
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void JoypadLinux::monitor_joypads() {
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while (!monitor_joypads_exit.is_set()) {
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DIR *input_directory;
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input_directory = opendir("/dev/input");
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if (input_directory) {
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struct dirent *current;
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char fname[64];
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while ((current = readdir(input_directory)) != nullptr) {
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if (strncmp(current->d_name, "event", 5) != 0) {
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continue;
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}
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sprintf(fname, "/dev/input/%.*s", 16, current->d_name);
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if (attached_devices.find(fname) == -1) {
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open_joypad(fname);
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}
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}
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}
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closedir(input_directory);
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usleep(1000000); // 1s
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}
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}
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void JoypadLinux::close_joypads() {
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for (int i = 0; i < JOYPADS_MAX; i++) {
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MutexLock lock(joypads_mutex[i]);
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Joypad &joypad = joypads[i];
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close_joypad(joypad, i);
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}
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}
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void JoypadLinux::close_joypad(const char *p_devpath) {
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for (int i = 0; i < JOYPADS_MAX; i++) {
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MutexLock lock(joypads_mutex[i]);
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Joypad &joypad = joypads[i];
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if (joypads[i].devpath == p_devpath) {
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close_joypad(joypad, i);
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}
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}
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}
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void JoypadLinux::close_joypad(Joypad &p_joypad, int p_id) {
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if (p_joypad.fd != -1) {
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close(p_joypad.fd);
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p_joypad.fd = -1;
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attached_devices.erase(p_joypad.devpath);
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input->joy_connection_changed(p_id, false, "");
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};
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p_joypad.events.clear();
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}
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static String _hex_str(uint8_t p_byte) {
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static const char *dict = "0123456789abcdef";
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char ret[3];
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ret[2] = 0;
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ret[0] = dict[p_byte >> 4];
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ret[1] = dict[p_byte & 0xF];
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return ret;
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}
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void JoypadLinux::setup_joypad_properties(Joypad &p_joypad) {
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unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
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unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
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int num_buttons = 0;
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int num_axes = 0;
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if ((ioctl(p_joypad.fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
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(ioctl(p_joypad.fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0)) {
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return;
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}
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for (int i = BTN_JOYSTICK; i < KEY_MAX; ++i) {
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if (test_bit(i, keybit)) {
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p_joypad.key_map[i] = num_buttons++;
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}
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}
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for (int i = BTN_MISC; i < BTN_JOYSTICK; ++i) {
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if (test_bit(i, keybit)) {
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p_joypad.key_map[i] = num_buttons++;
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}
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}
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for (int i = 0; i < ABS_MISC; ++i) {
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/* Skip hats */
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if (i == ABS_HAT0X) {
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i = ABS_HAT3Y;
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continue;
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}
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if (test_bit(i, absbit)) {
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p_joypad.abs_map[i] = num_axes++;
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p_joypad.abs_info[i] = memnew(input_absinfo);
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if (ioctl(p_joypad.fd, EVIOCGABS(i), p_joypad.abs_info[i]) < 0) {
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memdelete(p_joypad.abs_info[i]);
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p_joypad.abs_info[i] = nullptr;
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}
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}
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}
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p_joypad.force_feedback = false;
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p_joypad.ff_effect_timestamp = 0;
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unsigned long ffbit[NBITS(FF_CNT)];
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if (ioctl(p_joypad.fd, EVIOCGBIT(EV_FF, sizeof(ffbit)), ffbit) != -1) {
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if (test_bit(FF_RUMBLE, ffbit)) {
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p_joypad.force_feedback = true;
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}
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}
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}
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void JoypadLinux::open_joypad(const char *p_path) {
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int joy_num = input->get_unused_joy_id();
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int fd = open(p_path, O_RDWR | O_NONBLOCK);
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if (fd != -1 && joy_num != -1) {
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unsigned long evbit[NBITS(EV_MAX)] = { 0 };
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unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
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unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
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// add to attached devices so we don't try to open it again
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attached_devices.push_back(String(p_path));
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if ((ioctl(fd, EVIOCGBIT(0, sizeof(evbit)), evbit) < 0) ||
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(ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
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(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0)) {
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close(fd);
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return;
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}
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//check if the device supports basic gamepad events, prevents certain keyboards from
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//being detected as joypads
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if (!(test_bit(EV_KEY, evbit) && test_bit(EV_ABS, evbit) &&
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(test_bit(ABS_X, absbit) || test_bit(ABS_Y, absbit) || test_bit(ABS_HAT0X, absbit) ||
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test_bit(ABS_GAS, absbit) || test_bit(ABS_RUDDER, absbit)) &&
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(test_bit(BTN_A, keybit) || test_bit(BTN_THUMBL, keybit) ||
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test_bit(BTN_TRIGGER, keybit) || test_bit(BTN_1, keybit))) &&
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!(test_bit(EV_ABS, evbit) &&
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test_bit(ABS_X, absbit) && test_bit(ABS_Y, absbit) &&
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test_bit(ABS_RX, absbit) && test_bit(ABS_RY, absbit))) {
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close(fd);
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return;
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}
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char uid[128];
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char namebuf[128];
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String name = "";
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input_id inpid;
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if (ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) >= 0) {
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name = namebuf;
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}
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if (ioctl(fd, EVIOCGID, &inpid) < 0) {
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close(fd);
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return;
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}
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MutexLock lock(joypads_mutex[joy_num]);
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Joypad &joypad = joypads[joy_num];
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joypad.reset();
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joypad.fd = fd;
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joypad.devpath = String(p_path);
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setup_joypad_properties(joypad);
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sprintf(uid, "%04x%04x", BSWAP16(inpid.bustype), 0);
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if (inpid.vendor && inpid.product && inpid.version) {
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uint16_t vendor = BSWAP16(inpid.vendor);
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uint16_t product = BSWAP16(inpid.product);
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uint16_t version = BSWAP16(inpid.version);
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sprintf(uid + String(uid).length(), "%04x%04x%04x%04x%04x%04x", vendor, 0, product, 0, version, 0);
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input->joy_connection_changed(joy_num, true, name, uid);
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} else {
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String uidname = uid;
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int uidlen = MIN(name.length(), 11);
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for (int i = 0; i < uidlen; i++) {
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uidname = uidname + _hex_str(name[i]);
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}
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uidname += "00";
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input->joy_connection_changed(joy_num, true, name, uidname);
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}
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}
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}
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void JoypadLinux::joypad_vibration_start(Joypad &p_joypad, float p_weak_magnitude, float p_strong_magnitude, float p_duration, uint64_t p_timestamp) {
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if (!p_joypad.force_feedback || p_joypad.fd == -1 || p_weak_magnitude < 0.f || p_weak_magnitude > 1.f || p_strong_magnitude < 0.f || p_strong_magnitude > 1.f) {
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return;
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}
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if (p_joypad.ff_effect_id != -1) {
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joypad_vibration_stop(p_joypad, p_timestamp);
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}
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struct ff_effect effect;
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effect.type = FF_RUMBLE;
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effect.id = -1;
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effect.u.rumble.weak_magnitude = floor(p_weak_magnitude * (float)0xffff);
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effect.u.rumble.strong_magnitude = floor(p_strong_magnitude * (float)0xffff);
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effect.replay.length = floor(p_duration * 1000);
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effect.replay.delay = 0;
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if (ioctl(p_joypad.fd, EVIOCSFF, &effect) < 0) {
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return;
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}
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struct input_event play;
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play.type = EV_FF;
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play.code = effect.id;
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play.value = 1;
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if (write(p_joypad.fd, (const void *)&play, sizeof(play)) == -1) {
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print_verbose("Couldn't write to Joypad device.");
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}
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p_joypad.ff_effect_id = effect.id;
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p_joypad.ff_effect_timestamp = p_timestamp;
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}
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void JoypadLinux::joypad_vibration_stop(Joypad &p_joypad, uint64_t p_timestamp) {
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if (!p_joypad.force_feedback || p_joypad.fd == -1 || p_joypad.ff_effect_id == -1) {
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return;
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}
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if (ioctl(p_joypad.fd, EVIOCRMFF, p_joypad.ff_effect_id) < 0) {
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return;
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}
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p_joypad.ff_effect_id = -1;
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p_joypad.ff_effect_timestamp = p_timestamp;
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}
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float JoypadLinux::axis_correct(const input_absinfo *p_abs, int p_value) const {
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int min = p_abs->minimum;
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int max = p_abs->maximum;
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// Convert to a value between -1.0f and 1.0f.
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return 2.0f * (p_value - min) / (max - min) - 1.0f;
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}
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void JoypadLinux::joypad_events_thread_func(void *p_user) {
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if (p_user) {
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JoypadLinux *joy = (JoypadLinux *)p_user;
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joy->joypad_events_thread_run();
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}
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}
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void JoypadLinux::joypad_events_thread_run() {
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while (!joypad_events_exit.is_set()) {
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bool no_events = true;
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for (int i = 0; i < JOYPADS_MAX; i++) {
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MutexLock lock(joypads_mutex[i]);
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Joypad &joypad = joypads[i];
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if (joypad.fd == -1) {
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continue;
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}
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input_event event;
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while (read(joypad.fd, &event, sizeof(event)) > 0) {
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JoypadEvent joypad_event;
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joypad_event.type = event.type;
|
|
joypad_event.code = event.code;
|
|
joypad_event.value = event.value;
|
|
joypad.events.push_back(joypad_event);
|
|
}
|
|
if (errno != EAGAIN) {
|
|
close_joypad(joypad, i);
|
|
}
|
|
}
|
|
if (no_events) {
|
|
usleep(10000); // 10ms
|
|
}
|
|
}
|
|
}
|
|
|
|
void JoypadLinux::process_joypads() {
|
|
for (int i = 0; i < JOYPADS_MAX; i++) {
|
|
MutexLock lock(joypads_mutex[i]);
|
|
Joypad &joypad = joypads[i];
|
|
if (joypad.fd == -1) {
|
|
continue;
|
|
}
|
|
for (uint32_t j = 0; j < joypad.events.size(); j++) {
|
|
const JoypadEvent &joypad_event = joypad.events[j];
|
|
// joypad_event may be tainted and out of MAX_KEY range, which will cause
|
|
// joypad.key_map[joypad_event.code] to crash
|
|
if (joypad_event.code >= MAX_KEY) {
|
|
return;
|
|
}
|
|
|
|
switch (joypad_event.type) {
|
|
case EV_KEY:
|
|
input->joy_button(i, joypad.key_map[joypad_event.code], joypad_event.value);
|
|
break;
|
|
|
|
case EV_ABS:
|
|
switch (joypad_event.code) {
|
|
case ABS_HAT0X:
|
|
if (joypad_event.value != 0) {
|
|
if (joypad_event.value < 0) {
|
|
joypad.dpad = (joypad.dpad | InputDefault::HAT_MASK_LEFT) & ~InputDefault::HAT_MASK_RIGHT;
|
|
} else {
|
|
joypad.dpad = (joypad.dpad | InputDefault::HAT_MASK_RIGHT) & ~InputDefault::HAT_MASK_LEFT;
|
|
}
|
|
} else {
|
|
joypad.dpad &= ~(InputDefault::HAT_MASK_LEFT | InputDefault::HAT_MASK_RIGHT);
|
|
}
|
|
input->joy_hat(i, joypad.dpad);
|
|
break;
|
|
|
|
case ABS_HAT0Y:
|
|
if (joypad_event.value != 0) {
|
|
if (joypad_event.value < 0) {
|
|
joypad.dpad = (joypad.dpad | InputDefault::HAT_MASK_UP) & ~InputDefault::HAT_MASK_DOWN;
|
|
} else {
|
|
joypad.dpad = (joypad.dpad | InputDefault::HAT_MASK_DOWN) & ~InputDefault::HAT_MASK_UP;
|
|
}
|
|
} else {
|
|
joypad.dpad &= ~(InputDefault::HAT_MASK_UP | InputDefault::HAT_MASK_DOWN);
|
|
}
|
|
input->joy_hat(i, joypad.dpad);
|
|
break;
|
|
|
|
default:
|
|
if (joypad_event.code >= MAX_ABS) {
|
|
return;
|
|
}
|
|
if (joypad.abs_map[joypad_event.code] != -1 && joypad.abs_info[joypad_event.code]) {
|
|
float value = axis_correct(joypad.abs_info[joypad_event.code], joypad_event.value);
|
|
joypad.curr_axis[joypad.abs_map[joypad_event.code]] = value;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
joypad.events.clear();
|
|
|
|
for (int j = 0; j < MAX_ABS; j++) {
|
|
int index = joypad.abs_map[j];
|
|
if (index != -1) {
|
|
input->joy_axis(i, index, joypad.curr_axis[index]);
|
|
}
|
|
}
|
|
|
|
if (joypad.force_feedback) {
|
|
uint64_t timestamp = input->get_joy_vibration_timestamp(i);
|
|
if (timestamp > joypad.ff_effect_timestamp) {
|
|
Vector2 strength = input->get_joy_vibration_strength(i);
|
|
float duration = input->get_joy_vibration_duration(i);
|
|
if (strength.x == 0 && strength.y == 0) {
|
|
joypad_vibration_stop(joypad, timestamp);
|
|
} else {
|
|
joypad_vibration_start(joypad, strength.x, strength.y, duration, timestamp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif // JOYDEV_ENABLED
|