diff options
Diffstat (limited to 'joystik.c')
| -rw-r--r-- | joystik.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/joystik.c b/joystik.c new file mode 100644 index 0000000..2c09093 --- /dev/null +++ b/joystik.c @@ -0,0 +1,191 @@ +/* +'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); + } + } + } +} + |