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/*
'pd_joystik' (An external library for Miller Puckette's 'PD' software
adding PC and/or USB joystik control capabilities)
Copyright (C) 2001 Antoine Rousseau (from the initial file of Joseph A. Sarlo)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <m_pd.h>
#include <s_stuff.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <linux/joystick.h>
#include <glib.h>
/*0=normal joystick: /dev/jsXX 1=usb joystick: /dev/input/jsXX */
static GList *(joy_lists)[2][16]={{0},{0}};
static int fds[2][16];
typedef struct _joystik
{
t_object t_ob;
t_outlet *x_axis_out;
t_outlet *x_button_out;
guchar x_connected;
guchar x_usb; /*0:normal 1:usb*/
gushort x_number; /*0 to 15*/
}t_joystik;
t_class *joystik_class;
void joystik_setup(void);
static void joystik_read(GList *l,int fd);
static void fd_open(int usb,int n)
{
char filename[128];
int *fd=&fds[(int)usb][(int)n];
GList *l=joy_lists[(int)usb][(int)n];
if(usb) sprintf(filename,"/dev/input/js%d",n);
else sprintf(filename,"/dev/js%d",n);
if(*fd<=0){
*fd = open (filename, O_RDONLY | O_NONBLOCK);
if(*fd<0){
post("open (%s, O_RDONLY | O_NONBLOCK)",filename);
perror("open");
return;
}
}
sys_addpollfn(*fd,(t_fdpollfn)joystik_read,(void*)l);
/*post("joystick: adding poll");*/
}
static void fd_close(int usb,int n)
{
int *fd=&fds[(int)usb][(int)n];
sys_rmpollfn(*fd);
close(*fd);
*fd=-1;
/*post("joystick: removing poll");*/
}
static void joystik_connect(t_joystik *x)
{
GList *l=joy_lists[x->x_usb][x->x_number];
if(g_list_find(l,(void*)x)) return;
g_list_append(l,(void*)x);
if(g_list_length(l)==2){
fd_open(x->x_usb,x->x_number);
}
}
static void joystik_deconnect(t_joystik *x)
{
GList *l=joy_lists[x->x_usb][x->x_number];
if(!g_list_find(l,(void*)x)) return;
g_list_remove(l,(void*)x);
if(g_list_length(l)==1){
fd_close(x->x_usb,x->x_number);
}
}
static void joystik_float(t_joystik *x,t_floatarg connect)
{
connect=(connect!=0);
if(x->x_connected==connect) return;
if(connect) joystik_connect(x);
else joystik_deconnect(x);
x->x_connected=connect;
}
static void *joystik_new(t_float num, t_float usb)
{
t_joystik *x = (t_joystik *)pd_new(joystik_class);
int n=num;
GList **l=0;
if((n<0)||(n>16)) {
post("ERROR in joystik_new : device number out of range");
return (void*)x;
}
usb=(usb!=0);
x->x_axis_out = outlet_new(&x->t_ob, &s_list);
x->x_button_out = outlet_new(&x->t_ob, &s_list);
x->x_connected=0;
x->x_usb=usb;
x->x_number=n;
l=&joy_lists[(int)usb][(int)n];
if(!*l) *l=g_list_alloc();
return (void *)x;
}
void joystik_setup(void)
{
joystik_class = class_new(gensym("joystik"),(t_newmethod)joystik_new,
(t_method)joystik_deconnect, sizeof(t_joystik), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(joystik_class, joystik_float);
}
static void joystik_read(GList *l,int fd)
{
#define AMP 32767.0
int rt;
struct js_event e;
t_atom ats[2];
GList *ltmp;
while (read (fd, &e, sizeof(struct js_event)) > -1)
{
SETFLOAT(&ats[0],e.number);
if (e.type == JS_EVENT_AXIS)
{
SETFLOAT(&ats[1],e.value/AMP);
ltmp=l;
while(ltmp->next){
ltmp=ltmp->next;
outlet_list(((t_joystik*)ltmp->data)->x_axis_out,0,2,ats);
}
}
else if (e.type == JS_EVENT_BUTTON)
{
SETFLOAT(&ats[1],e.value);
ltmp=l;
while(ltmp->next){
ltmp=ltmp->next;
outlet_list(((t_joystik*)ltmp->data)->x_button_out,0,2,ats);
}
}
}
}
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