173 lines
4.5 KiB
C++
173 lines
4.5 KiB
C++
/*
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* wiiuse
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*
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* Written By:
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* Michael Laforest < para >
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* Email: < thepara (--AT--) g m a i l [--DOT--] com >
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*
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* Copyright 2006-2007
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*
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* This file is part of wiiuse.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* $Header$
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*
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*/
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/**
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* @file
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* @brief Guitar Hero 3 expansion device.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#ifdef WIN32
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#include <Winsock2.h>
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#endif
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#include "definitions.h"
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#include "wiiuse_internal.h"
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#include "dynamics.h"
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#include "events.h"
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#include "guitar_hero_3.h"
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static void guitar_hero_3_pressed_buttons(struct guitar_hero_3_t* gh3, short now);
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/**
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* @brief Handle the handshake data from the guitar.
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*
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* @param cc A pointer to a classic_ctrl_t structure.
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* @param data The data read in from the device.
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* @param len The length of the data block, in bytes.
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*
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* @return Returns 1 if handshake was successful, 0 if not.
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*/
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int guitar_hero_3_handshake(struct wiimote_t* wm, struct guitar_hero_3_t* gh3, byte* data, unsigned short len) {
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int i;
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int offset = 0;
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/*
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* The good fellows that made the Guitar Hero 3 controller
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* failed to factory calibrate the devices. There is no
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* calibration data on the device.
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*/
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gh3->btns = 0;
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gh3->btns_held = 0;
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gh3->btns_released = 0;
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gh3->whammy_bar = 0.0f;
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/* decrypt data */
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for (i = 0; i < len; ++i)
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data[i] = (data[i] ^ 0x17) + 0x17;
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if (data[offset] == 0xFF) {
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/*
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* Sometimes the data returned here is not correct.
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* This might happen because the wiimote is lagging
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* behind our initialization sequence.
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* To fix this just request the handshake again.
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*
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* Other times it's just the first 16 bytes are 0xFF,
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* but since the next 16 bytes are the same, just use
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* those.
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*/
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if (data[offset + 16] == 0xFF) {
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/* get the calibration data */
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byte* handshake_buf = (byte *)malloc(EXP_HANDSHAKE_LEN * sizeof(byte));
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WIIUSE_DEBUG("Guitar Hero 3 handshake appears invalid, trying again.");
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wiiuse_read_data_cb(wm, handshake_expansion, handshake_buf, WM_EXP_MEM_CALIBR, EXP_HANDSHAKE_LEN);
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return 0;
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} else
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offset += 16;
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}
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/* joystick stuff */
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gh3->js.max.x = GUITAR_HERO_3_JS_MAX_X;
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gh3->js.min.x = GUITAR_HERO_3_JS_MIN_X;
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gh3->js.center.x = GUITAR_HERO_3_JS_CENTER_X;
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gh3->js.max.y = GUITAR_HERO_3_JS_MAX_Y;
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gh3->js.min.y = GUITAR_HERO_3_JS_MIN_Y;
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gh3->js.center.y = GUITAR_HERO_3_JS_CENTER_Y;
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/* handshake done */
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wm->exp.type = EXP_GUITAR_HERO_3;
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#ifdef WIN32
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wm->timeout = WIIMOTE_DEFAULT_TIMEOUT;
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#endif
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return 1;
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}
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/**
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* @brief The guitar disconnected.
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*
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* @param cc A pointer to a classic_ctrl_t structure.
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*/
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void guitar_hero_3_disconnected(struct guitar_hero_3_t* gh3) {
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memset(gh3, 0, sizeof(struct guitar_hero_3_t));
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}
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/**
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* @brief Handle guitar event.
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*
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* @param cc A pointer to a classic_ctrl_t structure.
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* @param msg The message specified in the event packet.
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*/
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void guitar_hero_3_event(struct guitar_hero_3_t* gh3, byte* msg) {
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int i;
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/* decrypt data */
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for (i = 0; i < 6; ++i)
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msg[i] = (msg[i] ^ 0x17) + 0x17;
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guitar_hero_3_pressed_buttons(gh3, BIG_ENDIAN_SHORT(*(short*)(msg + 4)));
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/* whammy bar */
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gh3->whammy_bar = (msg[3] - GUITAR_HERO_3_WHAMMY_BAR_MIN) / (float)(GUITAR_HERO_3_WHAMMY_BAR_MAX - GUITAR_HERO_3_WHAMMY_BAR_MIN);
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/* joy stick */
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calc_joystick_state(&gh3->js, msg[0], msg[1]);
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}
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/**
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* @brief Find what buttons are pressed.
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*
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* @param cc A pointer to a classic_ctrl_t structure.
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* @param msg The message byte specified in the event packet.
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*/
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static void guitar_hero_3_pressed_buttons(struct guitar_hero_3_t* gh3, short now) {
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/* message is inverted (0 is active, 1 is inactive) */
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now = ~now & GUITAR_HERO_3_BUTTON_ALL;
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/* pressed now & were pressed, then held */
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gh3->btns_held = (now & gh3->btns);
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/* were pressed or were held & not pressed now, then released */
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gh3->btns_released = ((gh3->btns | gh3->btns_held) & ~now);
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/* buttons pressed now */
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gh3->btns = now;
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}
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