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RetroArch/input/input_mapper.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
* Copyright (C) 2016-2017 - Andrés Suárez
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif
#include <compat/strl.h>
#include <compat/posix_string.h>
#include <retro_miscellaneous.h>
#include <libretro.h>
#ifdef HAVE_MENU
#include "../menu/menu_driver.h"
#endif
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include "input_mapper.h"
#ifdef HAVE_OVERLAY
#include "input_overlay.h"
#endif
#include "../configuration.h"
#include "../msg_hash.h"
#include "../verbosity.h"
#define MAPPER_GET_KEY(state, key) (((state)->keys[(key) / 32] >> ((key) % 32)) & 1)
#define MAPPER_SET_KEY(state, key) (state)->keys[(key) / 32] |= 1 << ((key) % 32)
struct input_mapper
{
/* Left X, Left Y, Right X, Right Y */
int16_t analog_value[MAX_USERS][8];
/* the whole keyboard state */
uint32_t keys[RETROK_LAST / 32 + 1];
/* This is a bitmask of (1 << key_bind_id). */
input_bits_t buttons[MAX_USERS];
};
static bool input_mapper_button_pressed(input_mapper_t *handle, unsigned port, unsigned id)
{
return BIT256_GET(handle->buttons[port], id);
}
input_mapper_t *input_mapper_new(void)
{
input_mapper_t* handle = (input_mapper_t*)
calloc(1, sizeof(*handle));
if (!handle)
return NULL;
return handle;
}
void input_mapper_free(input_mapper_t *handle)
{
if (!handle)
return;
free (handle);
}
void input_mapper_poll(input_mapper_t *handle)
{
unsigned i, j;
input_bits_t current_input;
settings_t *settings = config_get_ptr();
unsigned max_users =
*(input_driver_get_uint(INPUT_ACTION_MAX_USERS));
bool key_event[RARCH_CUSTOM_BIND_LIST_END] = { false };
#ifdef HAVE_OVERLAY
bool poll_overlay = input_overlay_is_alive(overlay_ptr) ? true : false;
#endif
#ifdef HAVE_MENU
if (menu_driver_is_alive())
return;
#endif
memset(handle->keys, 0, sizeof(handle->keys));
for (i = 0; i < max_users; i++)
{
unsigned device = settings->uints.input_libretro_device[i];
device &= RETRO_DEVICE_MASK;
switch (device)
{
/* keyboard to gamepad remapping */
case RETRO_DEVICE_KEYBOARD:
BIT256_CLEAR_ALL_PTR(&current_input);
input_get_state_for_port(settings, i, &current_input);
for (j = 0; j < RARCH_CUSTOM_BIND_LIST_END; j++)
{
unsigned remap_button =
settings->uints.input_keymapper_ids[i][j];
bool remap_valid = remap_button != RETROK_UNKNOWN;
if (remap_valid)
{
unsigned current_button_value = BIT256_GET(current_input, j);
if ((current_button_value == 1) && (j != remap_button))
{
MAPPER_SET_KEY (handle,
remap_button);
input_keyboard_event(true,
remap_button,
0, 0, RETRO_DEVICE_KEYBOARD);
key_event[j] = true;
}
/* key_event tracks if a key is pressed for ANY PLAYER, so we must check
if the key was used by any player before releasing */
else if (!key_event[j])
{
input_keyboard_event(false,
remap_button,
0, 0, RETRO_DEVICE_KEYBOARD);
}
}
}
break;
/* gamepad remapping */
case RETRO_DEVICE_JOYPAD:
case RETRO_DEVICE_ANALOG:
/* this loop iterates on all users and all buttons,
* and checks if a pressed button is assigned to any
* other button than the default one, then it sets
* the bit on the mapper input bitmap, later on the
* original input is cleared in input_state */
BIT256_CLEAR_ALL(handle->buttons[i]);
BIT256_CLEAR_ALL_PTR(&current_input);
for (j = 0; j < 8; j++)
handle->analog_value[i][j] = 0;
input_get_state_for_port(settings, i, &current_input);
for (j = 0; j < RARCH_FIRST_CUSTOM_BIND; j++)
{
bool remap_valid;
unsigned remap_button;
unsigned current_button_value = BIT256_GET(current_input, j);
#ifdef HAVE_OVERLAY
if (poll_overlay && i == 0)
current_button_value |= input_overlay_key_pressed(overlay_ptr, j);
#endif
remap_button =
settings->uints.input_remap_ids[i][j];
remap_valid = (current_button_value == 1) &&
(j != remap_button) && (remap_button != RARCH_UNMAPPED);
if (remap_valid)
{
if (remap_button < RARCH_FIRST_CUSTOM_BIND)
{
BIT256_SET(handle->buttons[i], remap_button);
}
else if (remap_button >= RARCH_FIRST_CUSTOM_BIND)
{
int invert = 1;
if (remap_button % 2 != 0)
invert = -1;
handle->analog_value[i][
remap_button - RARCH_FIRST_CUSTOM_BIND] =
32767 * invert;
}
}
}
for (j = 0; j < 8; j++)
{
unsigned k = j + RARCH_FIRST_CUSTOM_BIND;
int16_t current_axis_value = current_input.analogs[j];
unsigned remap_axis =
settings->uints.input_remap_ids[i][k];
if (
(abs(current_axis_value) > 0 &&
(k != remap_axis) &&
(remap_axis != RARCH_UNMAPPED)
))
{
if (remap_axis < RARCH_FIRST_CUSTOM_BIND &&
abs(current_axis_value) > *input_driver_get_float(INPUT_ACTION_AXIS_THRESHOLD) * 32767)
{
BIT256_SET(handle->buttons[i], remap_axis);
}
else
{
int invert = 1;
if ( (k % 2 == 0 && remap_axis % 2 != 0) ||
(k % 2 != 0 && remap_axis % 2 == 0)
)
invert = -1;
handle->analog_value[i][
remap_axis - RARCH_FIRST_CUSTOM_BIND] =
current_axis_value * invert;
#if 0
RARCH_LOG("axis %d(%d) remapped to axis %d val %d\n",
j, k,
remap_axis - RARCH_FIRST_CUSTOM_BIND,
current_axis_value);
#endif
}
}
}
break;
default:
break;
}
}
}
void input_mapper_state(
input_mapper_t *handle,
int16_t *ret,
unsigned port,
unsigned device,
unsigned idx,
unsigned id)
{
if (!handle)
return;
switch (device)
{
case RETRO_DEVICE_JOYPAD:
if (input_mapper_button_pressed(handle, port, id))
*ret = 1;
break;
case RETRO_DEVICE_ANALOG:
if (idx < 2 && id < 2)
{
int val = 0;
unsigned offset = 0 + (idx * 4) + (id * 2);
int val1 = handle->analog_value[port][offset];
int val2 = handle->analog_value[port][offset+1];
if (val1)
val = val1;
else if (val2)
val = val2;
if (val1 || val2)
*ret |= val;
}
break;
case RETRO_DEVICE_KEYBOARD:
if (id < RETROK_LAST)
if (MAPPER_GET_KEY(handle, id))
*ret |= 1;
break;
default:
break;
}
return;
}
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