RetroArch/input/connect/connect_nesusb.c
2017-12-05 12:07:35 +01:00

149 lines
3.7 KiB
C

/* RetroArch - A frontend for libretro.
* Copyright (C) 2013-2014 - Jason Fetters
* Copyright (C) 2011-2017 - 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 <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <boolean.h>
#include "joypad_connection.h"
#include "../input_defines.h"
struct hidpad_nesusb_data
{
struct pad_connection* connection;
uint8_t data[64];
uint32_t slot;
uint32_t buttons;
};
static void* hidpad_nesusb_init(void *data, uint32_t slot, send_control_t ptr)
{
struct pad_connection* connection = (struct pad_connection*)data;
struct hidpad_nesusb_data* device = (struct hidpad_nesusb_data*)
calloc(1, sizeof(struct hidpad_nesusb_data));
if (!device)
return NULL;
if (!connection)
{
free(device);
return NULL;
}
device->connection = connection;
device->slot = slot;
return device;
}
static void hidpad_nesusb_deinit(void *data)
{
struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
if (device)
free(device);
}
static void hidpad_nesusb_get_buttons(void *data, retro_bits_t* state)
{
struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
if (device)
{
BITS_COPY16_PTR(state, device->buttons);
}
else
BIT256_CLEAR_ALL_PTR(state);
}
static int16_t hidpad_nesusb_get_axis(void *data, unsigned axis)
{
int val;
struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
if (!device || axis >= 2)
return 0;
val = device->data[4 + axis];
val = (val << 8) - 0x8000;
return (abs(val) > 0x1000) ? val : 0;
}
static void hidpad_nesusb_packet_handler(void *data, uint8_t *packet, uint16_t size)
{
uint32_t i, pressed_keys;
static const uint32_t button_mapping[17] =
{
RETRO_DEVICE_ID_JOYPAD_L2,
RETRO_DEVICE_ID_JOYPAD_R2,
RETRO_DEVICE_ID_JOYPAD_L,
RETRO_DEVICE_ID_JOYPAD_R,
RETRO_DEVICE_ID_JOYPAD_SELECT,
RETRO_DEVICE_ID_JOYPAD_START,
NO_BTN,
NO_BTN,
NO_BTN,
NO_BTN,
NO_BTN,
NO_BTN,
RETRO_DEVICE_ID_JOYPAD_B,
RETRO_DEVICE_ID_JOYPAD_A,
RETRO_DEVICE_ID_JOYPAD_Y,
RETRO_DEVICE_ID_JOYPAD_X,
};
struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
if (!device)
return;
memcpy(device->data, packet, size);
device->buttons = 0;
pressed_keys = device->data[7] | (device->data[6] << 8);
for (i = 0; i < 16; i ++)
if (button_mapping[i] != NO_BTN)
device->buttons |= (pressed_keys & (1 << i)) ? (1 << button_mapping[i]) : 0;
}
static void hidpad_nesusb_set_rumble(void *data,
enum retro_rumble_effect effect, uint16_t strength)
{
(void)data;
(void)effect;
(void)strength;
}
const char * hidpad_nesusb_get_name(void *data)
{
(void)data;
/* For now we return a single static name */
return "Generic NES USB Controller";
}
pad_connection_interface_t pad_connection_nesusb = {
hidpad_nesusb_init,
hidpad_nesusb_deinit,
hidpad_nesusb_packet_handler,
hidpad_nesusb_set_rumble,
hidpad_nesusb_get_buttons,
hidpad_nesusb_get_axis,
hidpad_nesusb_get_name,
};