/* Copyright 2003 Hans-Christoph Steiner <hans@eds.org>
*
* This program 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 Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* $Id: rawjoystick.c,v 1.4 2003-10-20 16:17:52 eighthave Exp $
*
* TODO
* -make work with multiple joysticks (using SDL_JoyHatEvent.which)
* -figure out why it takes so long for [rawjoystick] to start
* -get throttle and twist working
* -use SDL_PumpEvent rather than SDL_PollEvent in _read
*/
static char *version = "$Revision: 1.4 $";
#include <SDL/SDL.h>
#include <m_pd.h>
#define DEBUG(x)
/* #define DEBUG(x) x */
/* total number of axes and buttons supported by this object */
/* each axis gets a fixed outlet */
#define RAWJOYSTICK_AXES 6
#define RAWJOYSTICK_BUTTONS 9
/* this is the outlet number for the hat switch */
#define RAWJOYSTICK_HATX 3
#define RAWJOYSTICK_HATY 4
/*------------------------------------------------------------------------------
* CLASS DEF
*/
static t_class *rawjoystick_class;
typedef struct _rawjoystick {
t_object x_obj;
SDL_Joystick *x_joystick;
t_int x_devnum;
int read_ok;
int started;
t_outlet *x_axis_out[RAWJOYSTICK_AXES];
t_outlet *x_button_num_out;
t_outlet *x_button_val_out;
t_clock *x_clock;
double x_delaytime;
int x_buttons;
int x_hats;
int x_axes;
} t_rawjoystick;
/*------------------------------------------------------------------------------
*/
static int rawjoystick_close(t_rawjoystick *x) {
DEBUG(post("rawjoystick_CLOSE"));
if ( SDL_JoystickOpened(x->x_devnum) ) {
SDL_JoystickClose(x->x_joystick);
return 1;
}
else {
post("ERROR: joystick not closed!!");
return 0;
}
}
static int rawjoystick_open(t_rawjoystick *x) {
rawjoystick_close(x);
DEBUG(post("rawjoystick_OPEN"));
/* open device */
SDL_JoystickEventState(SDL_ENABLE);
x->x_joystick = SDL_JoystickOpen(x->x_devnum);
/* test if device open */
/* get name of device */
if ( SDL_JoystickOpened(x->x_devnum) ) {
post ("Configuring %s",SDL_JoystickName(x->x_devnum));
}
else {
post("ERROR: joystick not opened!!");
return 0;
}
x->x_axes = SDL_JoystickNumAxes(x->x_joystick);
x->x_hats = SDL_JoystickNumHats(x->x_joystick);
x->x_buttons = SDL_JoystickNumButtons(x->x_joystick);
post (" device has %i axes, %i hats, and %i buttons.\n",x->x_axes,x->x_hats,x->x_buttons);
post ("WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING");
post ("This object is under development! The interface will change!");
post ("This means inlets, outlets, messages, etc. are not fixed!");
post ("WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING");
return 1;
}
/* read the joystick, called through clock */
static void *rawjoystick_read(t_rawjoystick *x) {
SDL_Event event;
/* DEBUG(post("rawjoystick_READ")); */
if ( ! SDL_JoystickOpened(x->x_devnum) ) {
post ("Joystick not open, you need to open it first.");
return 0;
}
/* DEBUG(post("Joystick read: %s",SDL_JoystickName(x->x_devnum));) */
if ( SDL_PollEvent(&event) ) {
DEBUG(post("SDL_Event.type: %i",event.type);)
DEBUG(post("SDL_JoyAxisEvent.value: %i",event.jaxis.value);)
DEBUG(post("SDL_JoyButtonEvent.value: %i",event.jbutton.state);)
switch (event.type) {
case SDL_JOYAXISMOTION:
/*
* It might be a good idea to make a for{;;} loop to output the values of
* all of the axes everytime in right-to-left order.
*/
outlet_float (x->x_axis_out[event.jaxis.axis], event.jaxis.value);
break;
case SDL_JOYHATMOTION:
/* this object only supports the first hat switch */
if (event.jhat.hat == 0) {
/* X axis */
if (event.jhat.value & SDL_HAT_LEFT) {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATX], -1);
} else if (event.jhat.value & SDL_HAT_RIGHT) {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATX], 1);
} else {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATX], 0);
}
/* Y axis */
if (event.jhat.value & SDL_HAT_UP) {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATY], -1);
} else if (event.jhat.value & SDL_HAT_DOWN) {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATY], 1);
} else {
outlet_float (x->x_axis_out[RAWJOYSTICK_HATY], 0);
}
}
break;
case SDL_JOYBUTTONDOWN:
outlet_float (x->x_button_val_out, 1);
outlet_float (x->x_button_num_out, (float)event.jbutton.button);
break;
case SDL_JOYBUTTONUP:
outlet_float (x->x_button_val_out, 0);
outlet_float (x->x_button_num_out, (float)event.jbutton.button);
break;
default:
DEBUG(post("Unhandled event."));
}
}
if (x->started)
clock_delay(x->x_clock, x->x_delaytime);
return NULL;
}
/* Actions */
static void rawjoystick_bang(t_rawjoystick* x) {
DEBUG(post("rawjoystick_bang"));
}
static void rawjoystick_float(t_rawjoystick* x) {
DEBUG(post("rawjoystick_float"));
}
void rawjoystick_start(t_rawjoystick* x)
{
DEBUG(post("rawjoystick_START"));
if ( ( SDL_JoystickOpened(x->x_devnum) ) && ( ! x->started ) ) {
x->started = 1;
clock_delay(x->x_clock, 0);
}
}
void rawjoystick_stop(t_rawjoystick* x) {
DEBUG(post("rawjoystick_STOP");)
if ( ( SDL_JoystickOpened(x->x_devnum) ) && ( x->started ) ) {
x->started = 0;
clock_unset(x->x_clock);
}
}
void rawjoystick_delay(t_rawjoystick* x, t_float f) {
DEBUG(post("rawjoystick_DELAY %f",f);)
x->x_delaytime = f;
}
/* Misc setup functions */
static void rawjoystick_free(t_rawjoystick* x) {
DEBUG(post("rawjoystick_free"));
rawjoystick_stop(x);
if ( SDL_JoystickOpened(x->x_devnum))
SDL_JoystickClose(x->x_joystick);
SDL_Quit();
clock_free(x->x_clock);
}
static void *rawjoystick_new(t_float argument) {
int i,joystickNumber;
t_rawjoystick *x = (t_rawjoystick *)pd_new(rawjoystick_class);
DEBUG(post("rawjoystick_NEW"));
post("rawHID(e) rawjoystick %s, <hans@eds.org>", version);
/* init vars */
x->x_devnum = 0;
x->read_ok = 1;
x->started = 0;
x->x_delaytime = 5;
x->x_clock = clock_new(x, (t_method)rawjoystick_read);
/* INIT SDL using joystick layer */
/* Note: Video is required to start Event Loop !! */
if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0 ) {
post("Could not initialize SDL: %s\n", SDL_GetError());
// exit(-1);
return (0); /* changed by olafmatt */
}
post("%i joysticks were found:", SDL_NumJoysticks() );
for( i=0; i < SDL_NumJoysticks(); i++ ) {
post(" %s", SDL_JoystickName(i));
}
joystickNumber = (int)argument;
if ( (joystickNumber >= 0) && (joystickNumber < SDL_NumJoysticks() ) )
x->x_devnum = joystickNumber;
else
post("Joystick %i does not exist!",joystickNumber);
/* create outlets for each axis */
for (i = 0; i < RAWJOYSTICK_AXES; i++)
x->x_axis_out[i] = outlet_new(&x->x_obj, &s_float);
/* create outlets for buttons */
x->x_button_num_out = outlet_new(&x->x_obj, &s_float);
x->x_button_val_out = outlet_new(&x->x_obj, &s_float);
/* Open the device and save settings */
if ( ! rawjoystick_open(x) ) return x;
return (x);
}
void rawjoystick_setup(void)
{
DEBUG(post("rawjoystick_setup");)
rawjoystick_class = class_new(gensym("rawjoystick"),
(t_newmethod)rawjoystick_new,
(t_method)rawjoystick_free,
sizeof(t_rawjoystick),0,A_DEFFLOAT,0);
/* add inlet datatype methods */
class_addfloat(rawjoystick_class,(t_method) rawjoystick_float);
class_addbang(rawjoystick_class,(t_method) rawjoystick_bang);
/* add inlet message methods */
class_addmethod(rawjoystick_class,(t_method) rawjoystick_open,gensym("open"),0);
class_addmethod(rawjoystick_class,(t_method) rawjoystick_close,gensym("close"),0);
class_addmethod(rawjoystick_class,(t_method) rawjoystick_start,gensym("start"),0);
class_addmethod(rawjoystick_class,(t_method) rawjoystick_stop,gensym("stop"),0);
class_addmethod(rawjoystick_class,(t_method) rawjoystick_read,gensym("read"),0);
class_addmethod(rawjoystick_class,(t_method) rawjoystick_delay,gensym("delay"),A_FLOAT,0);
}