mirror of
https://github.com/libretro/RetroArch
synced 2024-12-29 12:31:05 +00:00
255 lines
6.7 KiB
C
255 lines
6.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2012-2014 - Michael Lelli
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../driver.h"
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#include <sys/ioctl.h>
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#include <linux/input.h>
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#include <linux/kd.h>
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#include <termios.h>
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#include <unistd.h>
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#include <signal.h>
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#include "../general.h"
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#include "input_common.h"
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static long oldKbmd = 0xffff;
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static struct termios oldTerm, newTerm;
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typedef struct linuxraw_input
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{
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const rarch_joypad_driver_t *joypad;
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bool state[0x80];
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} linuxraw_input_t;
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static void linuxraw_resetKbmd(void)
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{
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if (oldKbmd != 0xffff)
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{
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ioctl(0, KDSKBMODE, oldKbmd);
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tcsetattr(0, TCSAFLUSH, &oldTerm);
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oldKbmd = 0xffff;
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}
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driver.stdin_claimed = false;
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}
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static void linuxraw_exitGracefully(int sig)
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{
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linuxraw_resetKbmd();
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kill(getpid(), sig);
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}
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static void *linuxraw_input_init(void)
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{
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// only work on terminals
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if (!isatty(0))
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return NULL;
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if (driver.stdin_claimed)
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{
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RARCH_WARN("stdin is already used for ROM loading. Cannot use stdin for input.\n");
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return NULL;
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}
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)calloc(1, sizeof(*linuxraw));
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if (!linuxraw)
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return NULL;
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if (oldKbmd == 0xffff)
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{
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tcgetattr(0, &oldTerm);
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newTerm = oldTerm;
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newTerm.c_lflag &= ~(ECHO | ICANON | ISIG);
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newTerm.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
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newTerm.c_cc[VMIN] = 0;
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newTerm.c_cc[VTIME] = 0;
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if (ioctl(0, KDGKBMODE, &oldKbmd) != 0)
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{
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free(linuxraw);
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return NULL;
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}
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}
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tcsetattr(0, TCSAFLUSH, &newTerm);
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if (ioctl(0, KDSKBMODE, K_MEDIUMRAW) != 0)
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{
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linuxraw_resetKbmd();
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free(linuxraw);
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return NULL;
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}
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struct sigaction sa;
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sa.sa_handler = linuxraw_exitGracefully;
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sa.sa_flags = SA_RESTART | SA_RESETHAND;
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sigemptyset(&sa.sa_mask);
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// trap some standard termination codes so we can restore the keyboard before we lose control
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sigaction(SIGABRT, &sa, NULL);
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sigaction(SIGBUS, &sa, NULL);
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sigaction(SIGFPE, &sa, NULL);
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sigaction(SIGILL, &sa, NULL);
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sigaction(SIGQUIT, &sa, NULL);
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sigaction(SIGSEGV, &sa, NULL);
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atexit(linuxraw_resetKbmd);
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linuxraw->joypad = input_joypad_init_driver(g_settings.input.joypad_driver);
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input_init_keyboard_lut(rarch_key_map_linux);
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driver.stdin_claimed = true; // We need to disable use of stdin command interface if stdin is supposed to be used for input.
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return linuxraw;
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}
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static bool linuxraw_key_pressed(linuxraw_input_t *linuxraw, int key)
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{
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unsigned sym = input_translate_rk_to_keysym((enum retro_key)key);
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return linuxraw->state[sym];
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}
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static bool linuxraw_is_pressed(linuxraw_input_t *linuxraw, const struct retro_keybind *binds, unsigned id)
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{
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if (id < RARCH_BIND_LIST_END)
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{
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const struct retro_keybind *bind = &binds[id];
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return bind->valid && linuxraw_key_pressed(linuxraw, binds[id].key);
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}
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else
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return false;
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}
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static int16_t linuxraw_analog_pressed(linuxraw_input_t *linuxraw,
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const struct retro_keybind *binds, unsigned index, unsigned id)
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{
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unsigned id_minus = 0;
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unsigned id_plus = 0;
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input_conv_analog_id_to_bind_id(index, id, &id_minus, &id_plus);
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int16_t pressed_minus = linuxraw_is_pressed(linuxraw,
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binds, id_minus) ? -0x7fff : 0;
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int16_t pressed_plus = linuxraw_is_pressed(linuxraw,
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binds, id_plus) ? 0x7fff : 0;
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return pressed_plus + pressed_minus;
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}
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static bool linuxraw_bind_button_pressed(void *data, int key)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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return linuxraw_is_pressed(linuxraw, g_settings.input.binds[0], key) ||
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input_joypad_pressed(linuxraw->joypad, 0, g_settings.input.binds[0], key);
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}
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static int16_t linuxraw_input_state(void *data, const struct retro_keybind **binds, unsigned port, unsigned device, unsigned index, unsigned id)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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int16_t ret;
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switch (device)
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{
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case RETRO_DEVICE_JOYPAD:
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return linuxraw_is_pressed(linuxraw, binds[port], id) ||
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input_joypad_pressed(linuxraw->joypad, port, binds[port], id);
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case RETRO_DEVICE_ANALOG:
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ret = linuxraw_analog_pressed(linuxraw, binds[port], index, id);
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if (!ret)
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ret = input_joypad_analog(linuxraw->joypad, port, index, id, binds[port]);
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return ret;
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default:
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return 0;
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}
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}
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static void linuxraw_input_free(void *data)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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if (!linuxraw)
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return;
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if (linuxraw->joypad)
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linuxraw->joypad->destroy();
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linuxraw_resetKbmd();
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free(data);
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}
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static bool linuxraw_set_rumble(void *data, unsigned port, enum retro_rumble_effect effect, uint16_t strength)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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return input_joypad_set_rumble(linuxraw->joypad, port, effect, strength);
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}
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static const rarch_joypad_driver_t *linuxraw_get_joypad_driver(void *data)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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return linuxraw->joypad;
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}
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static void linuxraw_input_poll(void *data)
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{
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linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
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uint8_t c;
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uint16_t t;
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while (read(STDIN_FILENO, &c, 1) > 0)
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{
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if (c == KEY_C && (linuxraw->state[KEY_LEFTCTRL] || linuxraw->state[KEY_RIGHTCTRL]))
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kill(getpid(), SIGINT);
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bool pressed = !(c & 0x80);
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c &= ~0x80;
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// ignore extended scancodes
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if (!c)
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read(STDIN_FILENO, &t, 2);
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else
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linuxraw->state[c] = pressed;
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}
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input_joypad_poll(linuxraw->joypad);
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}
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static uint64_t linuxraw_get_capabilities(void *data)
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{
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(void)data;
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uint64_t caps = 0;
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caps |= (1 << RETRO_DEVICE_JOYPAD);
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caps |= (1 << RETRO_DEVICE_ANALOG);
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return caps;
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}
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const input_driver_t input_linuxraw = {
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linuxraw_input_init,
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linuxraw_input_poll,
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linuxraw_input_state,
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linuxraw_bind_button_pressed,
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linuxraw_input_free,
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NULL,
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NULL,
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NULL,
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linuxraw_get_capabilities,
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NULL,
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"linuxraw",
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NULL,
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linuxraw_set_rumble,
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linuxraw_get_joypad_driver,
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};
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