RetroArch/input/drivers/linuxraw_input.c
2015-06-26 15:53:18 +02:00

317 lines
7.9 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2012-2015 - Michael Lelli
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/input.h>
#include <linux/kd.h>
#include <termios.h>
#include <signal.h>
#include <boolean.h>
#include "../../general.h"
#include "../input_keymaps.h"
#include "../input_common.h"
#include "../input_joypad.h"
static long oldKbmd = 0xffff;
static bool linuxraw_stdin_claimed = false;
static struct termios oldTerm, newTerm;
typedef struct linuxraw_input
{
bool blocked;
const input_device_driver_t *joypad;
bool state[0x80];
} linuxraw_input_t;
static void linuxraw_reset_kbmd(void)
{
if (oldKbmd != 0xffff)
{
ioctl(0, KDSKBMODE, oldKbmd);
tcsetattr(0, TCSAFLUSH, &oldTerm);
oldKbmd = 0xffff;
}
linuxraw_stdin_claimed = false;
}
static void linuxraw_exit_gracefully(int sig)
{
linuxraw_reset_kbmd();
kill(getpid(), sig);
}
static void *linuxraw_input_init(void)
{
struct sigaction sa = {{0}};
linuxraw_input_t *linuxraw = NULL;
driver_t *driver = driver_get_ptr();
settings_t *settings = config_get_ptr();
/* Only work on terminals. */
if (!isatty(0))
return NULL;
if (linuxraw_stdin_claimed)
{
RARCH_WARN("stdin is already used for content loading. Cannot use stdin for input.\n");
return NULL;
}
linuxraw = (linuxraw_input_t*)calloc(1, sizeof(*linuxraw));
if (!linuxraw)
return NULL;
if (oldKbmd == 0xffff)
{
tcgetattr(0, &oldTerm);
newTerm = oldTerm;
newTerm.c_lflag &= ~(ECHO | ICANON | ISIG);
newTerm.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
newTerm.c_cc[VMIN] = 0;
newTerm.c_cc[VTIME] = 0;
if (ioctl(0, KDGKBMODE, &oldKbmd) != 0)
{
free(linuxraw);
return NULL;
}
}
tcsetattr(0, TCSAFLUSH, &newTerm);
if (ioctl(0, KDSKBMODE, K_MEDIUMRAW) != 0)
{
linuxraw_reset_kbmd();
free(linuxraw);
return NULL;
}
sa.sa_handler = linuxraw_exit_gracefully;
sa.sa_flags = SA_RESTART | SA_RESETHAND;
sigemptyset(&sa.sa_mask);
/* Trap some standard termination codes so we
* can restore the keyboard before we lose control. */
sigaction(SIGABRT, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
sigaction(SIGFPE, &sa, NULL);
sigaction(SIGILL, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
sigaction(SIGSEGV, &sa, NULL);
atexit(linuxraw_reset_kbmd);
linuxraw->joypad = input_joypad_init_driver(
settings->input.joypad_driver, linuxraw);
input_keymaps_init_keyboard_lut(rarch_key_map_linux);
/* We need to disable use of stdin command interface if
* stdin is supposed to be used for input. */
linuxraw_stdin_claimed = true;
return linuxraw;
}
static bool linuxraw_grab_stdin(void *data)
{
return linuxraw_stdin_claimed;
}
static bool linuxraw_key_pressed(linuxraw_input_t *linuxraw, int key)
{
unsigned sym = input_keymaps_translate_rk_to_keysym((enum retro_key)key);
return linuxraw->state[sym];
}
static bool linuxraw_is_pressed(linuxraw_input_t *linuxraw,
const struct retro_keybind *binds, unsigned id)
{
const struct retro_keybind *bind = &binds[id];
if (id >= RARCH_BIND_LIST_END)
return false;
if (!bind)
return false;
return bind->valid && linuxraw_key_pressed(linuxraw, binds[id].key);
}
static int16_t linuxraw_analog_pressed(linuxraw_input_t *linuxraw,
const struct retro_keybind *binds, unsigned idx, unsigned id)
{
int16_t pressed_minus = 0, pressed_plus = 0;
unsigned id_minus = 0;
unsigned id_plus = 0;
input_conv_analog_id_to_bind_id(idx, id, &id_minus, &id_plus);
if (linuxraw_is_pressed(linuxraw, binds, id_minus))
pressed_minus = -0x7fff;
if (linuxraw_is_pressed(linuxraw, binds, id_plus))
pressed_plus = 0x7fff;
return pressed_plus + pressed_minus;
}
static bool linuxraw_bind_button_pressed(void *data, int key)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
settings_t *settings = config_get_ptr();
return linuxraw_is_pressed(linuxraw, settings->input.binds[0], key) ||
input_joypad_pressed(linuxraw->joypad, 0, settings->input.binds[0], key);
}
static int16_t linuxraw_input_state(void *data,
const struct retro_keybind **binds, unsigned port,
unsigned device, unsigned idx, unsigned id)
{
int16_t ret;
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
switch (device)
{
case RETRO_DEVICE_JOYPAD:
return linuxraw_is_pressed(linuxraw, binds[port], id) ||
input_joypad_pressed(linuxraw->joypad, port, binds[port], id);
case RETRO_DEVICE_ANALOG:
ret = linuxraw_analog_pressed(linuxraw, binds[port], idx, id);
if (!ret)
ret = input_joypad_analog(linuxraw->joypad, port, idx, id, binds[port]);
return ret;
}
return 0;
}
static void linuxraw_input_free(void *data)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
if (!linuxraw)
return;
if (linuxraw->joypad)
linuxraw->joypad->destroy();
linuxraw_reset_kbmd();
free(data);
}
static bool linuxraw_set_rumble(void *data, unsigned port,
enum retro_rumble_effect effect, uint16_t strength)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
if (!linuxraw)
return false;
return input_joypad_set_rumble(linuxraw->joypad, port, effect, strength);
}
static const input_device_driver_t *linuxraw_get_joypad_driver(void *data)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
if (!linuxraw)
return NULL;
return linuxraw->joypad;
}
static void linuxraw_input_poll(void *data)
{
uint8_t c;
uint16_t t;
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
while (read(STDIN_FILENO, &c, 1) > 0)
{
bool pressed;
if (c == KEY_C && (linuxraw->state[KEY_LEFTCTRL] || linuxraw->state[KEY_RIGHTCTRL]))
kill(getpid(), SIGINT);
pressed = !(c & 0x80);
c &= ~0x80;
/* ignore extended scancodes */
if (!c)
read(STDIN_FILENO, &t, 2);
else
linuxraw->state[c] = pressed;
}
if (linuxraw->joypad)
linuxraw->joypad->poll();
}
static uint64_t linuxraw_get_capabilities(void *data)
{
uint64_t caps = 0;
(void)data;
caps |= (1 << RETRO_DEVICE_JOYPAD);
caps |= (1 << RETRO_DEVICE_ANALOG);
return caps;
}
static void linuxraw_grab_mouse(void *data, bool state)
{
(void)data;
(void)state;
}
static bool linuxraw_keyboard_mapping_is_blocked(void *data)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
if (!linuxraw)
return false;
return linuxraw->blocked;
}
static void linuxraw_keyboard_mapping_set_block(void *data, bool value)
{
linuxraw_input_t *linuxraw = (linuxraw_input_t*)data;
if (!linuxraw)
return;
linuxraw->blocked = value;
}
input_driver_t input_linuxraw = {
linuxraw_input_init,
linuxraw_input_poll,
linuxraw_input_state,
linuxraw_bind_button_pressed,
linuxraw_input_free,
NULL,
NULL,
linuxraw_get_capabilities,
"linuxraw",
linuxraw_grab_mouse,
linuxraw_grab_stdin,
linuxraw_set_rumble,
linuxraw_get_joypad_driver,
linuxraw_keyboard_mapping_is_blocked,
linuxraw_keyboard_mapping_set_block,
};