2013-12-07 13:13:40 +00:00
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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
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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 "input_common.h"
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#include "../general.h"
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#include <unistd.h>
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#include <stdint.h>
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#include <string.h>
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#include <limits.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/poll.h>
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#include <fcntl.h>
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#include <libudev.h>
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#include <linux/types.h>
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#include <linux/input.h>
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typedef struct udev_input
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{
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const rarch_joypad_driver_t *joypad;
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uint8_t key_state[(KEY_MAX + 7) / 8];
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int keyboard_fd;
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int mouse_fd;
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int16_t mouse_x;
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int16_t mouse_y;
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bool mouse_l, mouse_r, mouse_m;
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} udev_input_t;
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static inline bool get_bit(const uint8_t *buf, unsigned bit)
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{
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return buf[bit >> 3] & (1 << (bit & 7));
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}
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static inline void clear_bit(uint8_t *buf, unsigned bit)
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{
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buf[bit >> 3] &= ~(1 << (bit & 7));
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}
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static inline void set_bit(uint8_t *buf, unsigned bit)
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{
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buf[bit >> 3] |= 1 << (bit & 7);
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}
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static void udev_input_poll(void *data)
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{
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udev_input_t *udev = (udev_input_t*)data;
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if (udev->keyboard_fd >= 0)
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{
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int i, len;
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struct input_event events[32];
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while ((len = read(udev->keyboard_fd, events, sizeof(events))) > 0)
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{
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len /= sizeof(*events);
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for (i = 0; i < len; i++)
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{
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switch (events[i].type)
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{
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case EV_KEY:
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if (events[i].value)
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set_bit(udev->key_state, events[i].code);
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else
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clear_bit(udev->key_state, events[i].code);
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break;
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default:
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break;
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}
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}
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}
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}
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if (udev->mouse_fd >= 0)
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{
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udev->mouse_x = udev->mouse_y = 0;
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int i, len;
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struct input_event events[32];
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2013-12-07 13:16:17 +00:00
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while ((len = read(udev->mouse_fd, events, sizeof(events))) > 0)
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2013-12-07 13:13:40 +00:00
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{
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len /= sizeof(*events);
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for (i = 0; i < len; i++)
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{
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switch (events[i].type)
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{
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case EV_KEY:
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switch (events[i].code)
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{
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case BTN_LEFT:
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udev->mouse_l = events[i].value;
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break;
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case BTN_RIGHT:
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udev->mouse_r = events[i].value;
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break;
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case BTN_MIDDLE:
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udev->mouse_m = events[i].value;
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break;
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default:
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break;
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}
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break;
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case EV_REL:
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switch (events[i].code)
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{
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case REL_X:
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udev->mouse_x += events[i].value;
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break;
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case REL_Y:
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udev->mouse_y += events[i].value;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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}
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}
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}
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input_joypad_poll(udev->joypad);
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}
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static int16_t udev_mouse_state(udev_input_t *udev, unsigned id)
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{
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switch (id)
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{
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case RETRO_DEVICE_ID_MOUSE_X:
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return udev->mouse_x;
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case RETRO_DEVICE_ID_MOUSE_Y:
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return udev->mouse_y;
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case RETRO_DEVICE_ID_MOUSE_LEFT:
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return udev->mouse_l;
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case RETRO_DEVICE_ID_MOUSE_RIGHT:
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return udev->mouse_r;
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default:
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return 0;
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}
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}
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static int16_t udev_lightgun_state(udev_input_t *udev, unsigned id)
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{
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switch (id)
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{
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case RETRO_DEVICE_ID_LIGHTGUN_X:
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return udev->mouse_x;
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case RETRO_DEVICE_ID_LIGHTGUN_Y:
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return udev->mouse_y;
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case RETRO_DEVICE_ID_LIGHTGUN_TRIGGER:
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return udev->mouse_l;
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case RETRO_DEVICE_ID_LIGHTGUN_CURSOR:
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return udev->mouse_m;
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case RETRO_DEVICE_ID_LIGHTGUN_TURBO:
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return udev->mouse_r;
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case RETRO_DEVICE_ID_LIGHTGUN_START:
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return udev->mouse_m && udev->mouse_r;
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case RETRO_DEVICE_ID_LIGHTGUN_PAUSE:
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return udev->mouse_m && udev->mouse_l;
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default:
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return 0;
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}
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}
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static bool udev_is_pressed(udev_input_t *udev, 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 && get_bit(udev->key_state, input_translate_rk_to_keysym(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 udev_analog_pressed(udev_input_t *udev,
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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 = udev_is_pressed(udev,
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binds, id_minus) ? -0x7fff : 0;
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int16_t pressed_plus = udev_is_pressed(udev,
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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 int16_t udev_input_state(void *data, const struct retro_keybind **binds,
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unsigned port, unsigned device, unsigned index, unsigned id)
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{
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udev_input_t *udev = (udev_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 udev_is_pressed(udev, binds[port], id) ||
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input_joypad_pressed(udev->joypad, port, binds[port], id);
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case RETRO_DEVICE_ANALOG:
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ret = udev_analog_pressed(udev, binds[port], index, id);
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if (!ret)
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ret = input_joypad_analog(udev->joypad, port, index, id, binds[port]);
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return ret;
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case RETRO_DEVICE_KEYBOARD:
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return id < RETROK_LAST && get_bit(udev->key_state, input_translate_rk_to_keysym(id));
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case RETRO_DEVICE_MOUSE:
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return udev_mouse_state(udev, id);
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case RETRO_DEVICE_LIGHTGUN:
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return udev_lightgun_state(udev, id);
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default:
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return 0;
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}
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}
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static bool udev_bind_button_pressed(void *data, int key)
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{
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udev_input_t *udev = (udev_input_t*)data;
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return udev_is_pressed(udev, g_settings.input.binds[0], key) ||
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input_joypad_pressed(udev->joypad, 0, g_settings.input.binds[0], key);
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}
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static void udev_input_free(void *data)
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{
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udev_input_t *udev = (udev_input_t*)data;
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if (udev->joypad)
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udev->joypad->destroy();
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if (udev->keyboard_fd >= 0)
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close(udev->keyboard_fd);
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if (udev->mouse_fd >= 0)
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close(udev->mouse_fd);
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free(udev);
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}
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static int open_device(const char *type)
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{
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int ret = -1;
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struct udev_list_entry *devs = NULL;
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struct udev_list_entry *item = NULL;
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struct udev *udev = udev_new();
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if (!udev)
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return ret;
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struct udev_enumerate *enumerate = udev_enumerate_new(udev);
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if (!enumerate)
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{
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udev_unref(udev);
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return ret;
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}
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udev_enumerate_add_match_property(enumerate, type, "1");
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udev_enumerate_scan_devices(enumerate);
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devs = udev_enumerate_get_list_entry(enumerate);
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for (item = devs; item; item = udev_list_entry_get_next(item))
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{
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const char *name = udev_list_entry_get_name(item);
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struct udev_device *dev = udev_device_new_from_syspath(udev, name);
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const char *devnode = udev_device_get_devnode(dev);
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int fd = devnode ? open(devnode, O_RDONLY | O_NONBLOCK) : -1;
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udev_device_unref(dev);
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if (fd >= 0)
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{
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ret = fd;
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break;
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}
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}
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udev_enumerate_unref(enumerate);
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udev_unref(udev);
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return ret;
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}
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static void *udev_input_init(void)
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{
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udev_input_t *udev = (udev_input_t*)calloc(1, sizeof(*udev));
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if (!udev)
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return NULL;
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udev->keyboard_fd = open_device("ID_INPUT_KEYBOARD");
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udev->mouse_fd = open_device("ID_INPUT_MOUSE");
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if (udev->keyboard_fd < 0)
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RARCH_WARN("Failed to find a keyboard.\n");
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if (udev->mouse_fd < 0)
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RARCH_WARN("Failed to find a mouse.\n");
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udev->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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return udev;
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}
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static uint64_t udev_input_get_capabilities(void *data)
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{
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(void)data;
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return
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(1 << RETRO_DEVICE_JOYPAD) |
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(1 << RETRO_DEVICE_ANALOG) |
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(1 << RETRO_DEVICE_KEYBOARD) |
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(1 << RETRO_DEVICE_MOUSE) |
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(1 << RETRO_DEVICE_LIGHTGUN);
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}
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static bool udev_input_set_rumble(void *data, unsigned port, enum retro_rumble_effect effect, uint16_t strength)
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{
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udev_input_t *udev = (udev_input_t*)data;
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return input_joypad_set_rumble(udev->joypad, port, effect, strength);
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}
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static const rarch_joypad_driver_t *udev_input_get_joypad_driver(void *data)
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{
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udev_input_t *udev = (udev_input_t*)data;
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return udev->joypad;
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}
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const input_driver_t input_udev = {
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udev_input_init,
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udev_input_poll,
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udev_input_state,
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udev_bind_button_pressed,
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udev_input_free,
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NULL,
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NULL,
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udev_input_get_capabilities,
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"udev",
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NULL,
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udev_input_set_rumble,
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udev_input_get_joypad_driver,
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};
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