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RetroArch/input/input_joypad_driver.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - Daniel De Matteis
*
* 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 <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "input_keymaps.h"
#include "../general.h"
#include "../string_list_special.h"
#include "../verbosity.h"
static input_device_driver_t *joypad_drivers[] = {
#ifdef __CELLOS_LV2__
&ps3_joypad,
#endif
#ifdef HAVE_XINPUT
&xinput_joypad,
#endif
#ifdef GEKKO
&gx_joypad,
#endif
#ifdef _XBOX
&xdk_joypad,
#endif
#if defined(PSP) || defined(VITA)
&psp_joypad,
#endif
#ifdef _3DS
&ctr_joypad,
#endif
#ifdef HAVE_DINPUT
&dinput_joypad,
#endif
#ifdef HAVE_UDEV
&udev_joypad,
#endif
#if defined(__linux) && !defined(ANDROID)
&linuxraw_joypad,
#endif
#ifdef HAVE_PARPORT
&parport_joypad,
#endif
#ifdef ANDROID
&android_joypad,
#endif
#if defined(HAVE_SDL) || defined(HAVE_SDL2)
&sdl_joypad,
#endif
#ifdef __QNX__
&qnx_joypad,
#endif
#ifdef HAVE_MFI
&mfi_joypad,
#endif
&hid_joypad,
&null_joypad,
NULL,
};
/**
* joypad_driver_find_handle:
* @idx : index of driver to get handle to.
*
* Returns: handle to joypad driver at index. Can be NULL
* if nothing found.
**/
const void *joypad_driver_find_handle(int idx)
{
const void *drv = joypad_drivers[idx];
if (!drv)
return NULL;
return drv;
}
/**
* joypad_driver_find_ident:
* @idx : index of driver to get handle to.
*
* Returns: Human-readable identifier of joypad driver at index. Can be NULL
* if nothing found.
**/
const char *joypad_driver_find_ident(int idx)
{
const input_device_driver_t *drv = joypad_drivers[idx];
if (!drv)
return NULL;
return drv->ident;
}
/**
* config_get_joypad_driver_options:
*
* Get an enumerated list of all joypad driver names, separated by '|'.
*
* Returns: string listing of all joypad driver names, separated by '|'.
**/
const char* config_get_joypad_driver_options(void)
{
return char_list_new_special(STRING_LIST_INPUT_JOYPAD_DRIVERS, NULL);
}
/**
* input_joypad_init_driver:
* @ident : identifier of driver to initialize.
*
* Initialize a joypad driver of name @ident.
*
* If ident points to NULL or a zero-length string,
* equivalent to calling input_joypad_init_first().
*
* Returns: joypad driver if found, otherwise NULL.
**/
const input_device_driver_t *input_joypad_init_driver(const char *ident, void *data)
{
unsigned i;
if (!ident || !*ident)
return input_joypad_init_first(data);
for (i = 0; joypad_drivers[i]; i++)
{
if (!strcmp(ident, joypad_drivers[i]->ident)
&& joypad_drivers[i]->init(data))
{
RARCH_LOG("Found joypad driver: \"%s\".\n",
joypad_drivers[i]->ident);
return joypad_drivers[i];
}
}
return input_joypad_init_first(data);
}
/**
* input_joypad_init_first:
*
* Finds first suitable joypad driver and initializes.
*
* Returns: joypad driver if found, otherwise NULL.
**/
const input_device_driver_t *input_joypad_init_first(void *data)
{
unsigned i;
for (i = 0; joypad_drivers[i]; i++)
{
if (joypad_drivers[i]->init(data))
{
RARCH_LOG("Found joypad driver: \"%s\".\n",
joypad_drivers[i]->ident);
return joypad_drivers[i];
}
}
return NULL;
}
/**
* input_joypad_name:
* @drv : Input device driver handle.
* @port : Joystick number.
*
* Gets name of the joystick (@port).
*
* Returns: name of joystick #port.
**/
const char *input_joypad_name(const input_device_driver_t *drv,
unsigned port)
{
if (!drv)
return NULL;
return drv->name(port);
}
/**
* input_joypad_set_rumble:
* @drv : Input device driver handle.
* @port : User number.
* @effect : Rumble effect to set.
* @strength : Strength of rumble effect.
*
* Sets rumble effect @effect with strength @strength.
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool input_joypad_set_rumble(const input_device_driver_t *drv,
unsigned port, enum retro_rumble_effect effect, uint16_t strength)
{
settings_t *settings = config_get_ptr();
unsigned joy_idx = settings->input.joypad_map[port];
if (!drv || !drv->set_rumble)
return false;
if (joy_idx >= MAX_USERS)
return false;
return drv->set_rumble(joy_idx, effect, strength);
}
/**
* input_joypad_is_pressed:
* @drv : Input device driver handle.
* @port : User number.
* @binds : Binds of user.
* @key : Identifier of key.
*
* Checks if key (@key) was being pressed by user
* with number @port with provided keybinds (@binds).
*
* Returns: true (1) if key was pressed, otherwise
* false (0).
**/
bool input_joypad_pressed(
const input_device_driver_t *drv,
unsigned port,
const void *binds_data,
unsigned key)
{
float scaled_axis;
int16_t axis;
uint32_t joyaxis;
uint64_t joykey;
const struct retro_keybind *auto_binds = NULL;
const struct retro_keybind *binds = (const struct retro_keybind*)
binds_data;
settings_t *settings = config_get_ptr();
unsigned joy_idx = settings->input.joypad_map[port];
if (joy_idx >= MAX_USERS)
return false;
if (!drv || !binds[key].valid)
return false;
/* Auto-binds are per joypad, not per user. */
auto_binds = settings->input.autoconf_binds[joy_idx];
joykey = binds[key].joykey;
if (joykey == NO_BTN)
joykey = auto_binds[key].joykey;
if (drv->button(joy_idx, (uint16_t)joykey))
return true;
joyaxis = binds[key].joyaxis;
if (joyaxis == AXIS_NONE)
joyaxis = auto_binds[key].joyaxis;
axis = drv->axis(joy_idx, joyaxis);
scaled_axis = (float)abs(axis) / 0x8000;
return scaled_axis > settings->input.axis_threshold;
}
/**
* input_joypad_analog:
* @drv : Input device driver handle.
* @port : User number.
* @idx : Analog key index.
* E.g.:
* - RETRO_DEVICE_INDEX_ANALOG_LEFT
* - RETRO_DEVICE_INDEX_ANALOG_RIGHT
* @ident : Analog key identifier.
* E.g.:
* - RETRO_DEVICE_ID_ANALOG_X
* - RETRO_DEVICE_ID_ANALOG_Y
* @binds : Binds of user.
*
* Gets analog value of analog key identifiers @idx and @ident
* from user with number @port with provided keybinds (@binds).
*
* Returns: analog value on success, otherwise 0.
**/
int16_t input_joypad_analog(const input_device_driver_t *drv,
unsigned port, unsigned idx, unsigned ident,
const void *binds_data)
{
uint32_t axis_minus, axis_plus;
uint64_t key_minus, key_plus;
int16_t pressed_minus, pressed_plus, res;
unsigned ident_minus = 0, ident_plus = 0;
int16_t digital_left = 0, digital_right = 0;
const struct retro_keybind *auto_binds = NULL;
const struct retro_keybind *bind_minus = NULL;
const struct retro_keybind *bind_plus = NULL;
const struct retro_keybind *binds = (const struct retro_keybind*)
binds_data;
settings_t *settings = config_get_ptr();
unsigned joy_idx = settings->input.joypad_map[port];
if (!drv)
return 0;
if (joy_idx >= MAX_USERS)
return 0;
/* Auto-binds are per joypad, not per user. */
auto_binds = settings->input.autoconf_binds[joy_idx];
input_conv_analog_id_to_bind_id(idx, ident, &ident_minus, &ident_plus);
bind_minus = &binds[ident_minus];
bind_plus = &binds[ident_plus];
if (!bind_minus->valid || !bind_plus->valid)
return 0;
axis_minus = bind_minus->joyaxis;
axis_plus = bind_plus->joyaxis;
if (axis_minus == AXIS_NONE)
axis_minus = auto_binds[ident_minus].joyaxis;
if (axis_plus == AXIS_NONE)
axis_plus = auto_binds[ident_plus].joyaxis;
pressed_minus = abs(drv->axis(joy_idx, axis_minus));
pressed_plus = abs(drv->axis(joy_idx, axis_plus));
res = pressed_plus - pressed_minus;
if (res != 0)
return res;
key_minus = bind_minus->joykey;
key_plus = bind_plus->joykey;
if (key_minus == NO_BTN)
key_minus = auto_binds[ident_minus].joykey;
if (key_plus == NO_BTN)
key_plus = auto_binds[ident_plus].joykey;
if (drv->button(joy_idx, (uint16_t)key_minus))
digital_left = -0x7fff;
if (drv->button(joy_idx, (uint16_t)key_plus))
digital_right = 0x7fff;
return digital_right + digital_left;
}
/**
* input_joypad_axis_raw:
* @drv : Input device driver handle.
* @port : Joystick number.
* @axis : Identifier of axis.
*
* Checks if axis (@axis) was being pressed by user
* with joystick number @port.
*
* Returns: true (1) if axis was pressed, otherwise
* false (0).
**/
int16_t input_joypad_axis_raw(const input_device_driver_t *drv,
unsigned port, unsigned axis)
{
if (!drv)
return 0;
return drv->axis(port, AXIS_POS(axis)) +
drv->axis(port, AXIS_NEG(axis));
}
/**
* input_joypad_button_raw:
* @drv : Input device driver handle.
* @port : Joystick number.
* @button : Identifier of key.
*
* Checks if key (@button) was being pressed by user
* with joystick number @port.
*
* Returns: true (1) if key was pressed, otherwise
* false (0).
**/
bool input_joypad_button_raw(const input_device_driver_t *drv,
unsigned port, unsigned button)
{
if (!drv)
return false;
return drv->button(port, button);
}
bool input_joypad_hat_raw(const input_device_driver_t *drv,
unsigned port, unsigned hat_dir, unsigned hat)
{
if (!drv)
return false;
return drv->button(port, HAT_MAP(hat, hat_dir));
}
/**
* input_conv_analog_id_to_bind_id:
* @idx : Analog key index.
* E.g.:
* - RETRO_DEVICE_INDEX_ANALOG_LEFT
* - RETRO_DEVICE_INDEX_ANALOG_RIGHT
* @ident : Analog key identifier.
* E.g.:
* - RETRO_DEVICE_ID_ANALOG_X
* - RETRO_DEVICE_ID_ANALOG_Y
* @ident_minus : Bind ID minus, will be set by function.
* @ident_plus : Bind ID plus, will be set by function.
*
* Takes as input analog key identifiers and converts
* them to corresponding bind IDs @ident_minus and @ident_plus.
**/
void input_conv_analog_id_to_bind_id(unsigned idx, unsigned ident,
unsigned *ident_minus, unsigned *ident_plus)
{
switch ((idx << 1) | ident)
{
case (RETRO_DEVICE_INDEX_ANALOG_LEFT << 1) | RETRO_DEVICE_ID_ANALOG_X:
*ident_minus = RARCH_ANALOG_LEFT_X_MINUS;
*ident_plus = RARCH_ANALOG_LEFT_X_PLUS;
break;
case (RETRO_DEVICE_INDEX_ANALOG_LEFT << 1) | RETRO_DEVICE_ID_ANALOG_Y:
*ident_minus = RARCH_ANALOG_LEFT_Y_MINUS;
*ident_plus = RARCH_ANALOG_LEFT_Y_PLUS;
break;
case (RETRO_DEVICE_INDEX_ANALOG_RIGHT << 1) | RETRO_DEVICE_ID_ANALOG_X:
*ident_minus = RARCH_ANALOG_RIGHT_X_MINUS;
*ident_plus = RARCH_ANALOG_RIGHT_X_PLUS;
break;
case (RETRO_DEVICE_INDEX_ANALOG_RIGHT << 1) | RETRO_DEVICE_ID_ANALOG_Y:
*ident_minus = RARCH_ANALOG_RIGHT_Y_MINUS;
*ident_plus = RARCH_ANALOG_RIGHT_Y_PLUS;
break;
}
}
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