#include #include "linuxhid.h" #define LINUXJOYSTICK_AXES 6 static char *version = "$Revision: 1.7 $"; /*------------------------------------------------------------------------------ * CLASS DEF */ static t_class *linuxjoystick_class; typedef struct _linuxjoystick { t_object x_obj; t_int x_fd; t_symbol *x_devname; t_clock *x_clock; int x_read_ok; int x_started; int x_delay; #ifdef __gnu_linux__ struct input_event x_input_event; #endif t_outlet *x_axis_out[LINUXJOYSTICK_AXES]; t_outlet *x_button_num_out; t_outlet *x_button_val_out; unsigned char x_buttons; unsigned char x_axes; } t_linuxjoystick; /*------------------------------------------------------------------------------ * IMPLEMENTATION */ void linuxjoystick_stop(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_stop");); if (x->x_fd >= 0 && x->x_started) { clock_unset(x->x_clock); post("linuxjoystick: polling stopped"); x->x_started = 0; } } static int linuxjoystick_close(t_linuxjoystick *x) { DEBUG(post("linuxjoystick_close");); /* just to be safe, stop it first */ linuxjoystick_stop(x); if (x->x_fd <0) return 0; close (x->x_fd); post ("[linuxjoystick] closed %s",x->x_devname->s_name); return 1; } static int linuxjoystick_open(t_linuxjoystick *x, t_symbol *s) { int eventType, eventCode, buttons, rel_axes, abs_axes, ff; #ifdef __linux__ unsigned long bitmask[EV_MAX][NBITS(KEY_MAX)]; #endif char devicename[256] = "Unknown"; DEBUG(post("linuxjoystick_open");) linuxjoystick_close(x); /* set obj device name to parameter * otherwise set to default */ if (s != &s_) x->x_devname = s; #ifdef __linux__ /* open device */ if (x->x_devname) { /* open the device read-only, non-exclusive */ x->x_fd = open (x->x_devname->s_name, O_RDONLY | O_NONBLOCK); /* test if device open */ if (x->x_fd < 0 ) { post("[linuxjoystick] open %s failed",x->x_devname->s_name); x->x_fd = -1; return 0; } } else return 1; /* read input_events from the LINUXJOYSTICK_DEVICE stream * It seems that is just there to flush the event input buffer? */ while (read (x->x_fd, &(x->x_input_event), sizeof(struct input_event)) > -1); /* get name of device */ ioctl(x->x_fd, EVIOCGNAME(sizeof(devicename)), devicename); post ("Configuring %s on %s",devicename,x->x_devname->s_name); /* get bitmask representing supported events (axes, buttons, etc.) */ memset(bitmask, 0, sizeof(bitmask)); ioctl(x->x_fd, EVIOCGBIT(0, EV_MAX), bitmask[0]); post("\nSupported events:"); rel_axes = 0; abs_axes = 0; buttons = 0; ff = 0; /* cycle through all possible event types */ for (eventType = 0; eventType < EV_MAX; eventType++) { if (test_bit(eventType, bitmask[0])) { post(" %s (type %d) ", events[eventType] ? events[eventType] : "?", eventType); // post("Event type %d",eventType); /* get bitmask representing supported button types */ ioctl(x->x_fd, EVIOCGBIT(eventType, KEY_MAX), bitmask[eventType]); /* cycle through all possible event codes (axes, keys, etc.) * testing to see which are supported */ for (eventCode = 0; eventCode < KEY_MAX; eventCode++) if (test_bit(eventCode, bitmask[eventType])) { post(" Event code %d (%s)", eventCode, names[eventType] ? (names[eventType][eventCode] ? names[eventType][eventCode] : "?") : "?"); switch(eventType) { #ifdef EV_RST case EV_RST: break; #endif case EV_KEY: buttons++; break; case EV_REL: rel_axes++; break; case EV_ABS: abs_axes++; break; case EV_MSC: break; case EV_LED: break; case EV_SND: break; case EV_REP: break; case EV_FF: ff++; break; } } } } post ("\nUsing %d relative axes, %d absolute axes, and %d buttons.", rel_axes, abs_axes, buttons); if (ff > 0) post ("Detected %d force feedback types",ff); post ("\nWARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING"); post ("This object is under development! The interface could change at anytime!"); post ("As I write cross-platform versions, the interface might have to change."); post ("WARNING * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING\n"); #endif return 1; } static int linuxjoystick_read(t_linuxjoystick *x,int fd) { int readBytes; int axis_num = 0; t_float button_num = 0; if (x->x_fd < 0) return 0; #ifdef __linux__ while (read (x->x_fd, &(x->x_input_event), sizeof(struct input_event)) > -1) { if ( x->x_input_event.type == EV_ABS ) { /* Relative Axes Event Type */ switch ( x->x_input_event.code ) { case ABS_X: axis_num = 0; break; case ABS_Y: axis_num = 1; break; case ABS_Z: axis_num = 2; break; case ABS_HAT0X: axis_num = 3; break; case ABS_HAT0Y: axis_num = 4; break; case ABS_THROTTLE: axis_num = 5; break; } outlet_float (x->x_axis_out[axis_num], (int)x->x_input_event.value); } else if ( x->x_input_event.type == EV_KEY ) { /* key/button event type */ switch ( x->x_input_event.code ) { case BTN_0: button_num = 0; break; case BTN_1: button_num = 1; break; case BTN_2: button_num = 2; break; case BTN_3: button_num = 3; break; case BTN_4: button_num = 4; break; case BTN_5: button_num = 5; break; case BTN_6: button_num = 6; break; case BTN_7: button_num = 7; break; case BTN_8: button_num = 8; break; case BTN_9: button_num = 9; break; case BTN_TRIGGER: button_num = 10; break; case BTN_THUMB: button_num = 11; break; case BTN_THUMB2: button_num = 12; break; case BTN_TOP: button_num = 13; break; case BTN_TOP2: button_num = 14; break; case BTN_PINKIE: button_num = 15; break; case BTN_BASE: button_num = 16; break; case BTN_BASE2: button_num = 17; break; case BTN_BASE3: button_num = 18; break; case BTN_BASE4: button_num = 19; break; case BTN_BASE5: button_num = 20; break; case BTN_BASE6: button_num = 21; break; } outlet_float (x->x_button_val_out, x->x_input_event.value); outlet_float (x->x_button_num_out, button_num); } } #endif if (x->x_started) { clock_delay(x->x_clock, x->x_delay); } return 1; } /* Actions */ static void linuxjoystick_float(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_float");) } void linuxjoystick_delay(t_linuxjoystick* x, t_float f) { DEBUG(post("linuxjoystick_DELAY %f",f);) /* if the user sets the delay less than zero, reset to default */ if ( f > 0 ) { x->x_delay = (int)f; } else { x->x_delay = DEFAULT_DELAY; } } void linuxjoystick_start(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_start");); #ifdef __linux__ if (x->x_fd >= 0 && !x->x_started) { clock_delay(x->x_clock, DEFAULT_DELAY); post("linuxjoystick: polling started"); x->x_started = 1; } else { post("You need to set a input device (i.e /dev/input/event0)"); } #endif } /* setup functions */ static void linuxjoystick_free(t_linuxjoystick* x) { DEBUG(post("linuxjoystick_free");) if (x->x_fd < 0) return; linuxjoystick_stop(x); clock_free(x->x_clock); close (x->x_fd); } static void *linuxjoystick_new(t_symbol *s) { int i; t_linuxjoystick *x = (t_linuxjoystick *)pd_new(linuxjoystick_class); DEBUG(post("linuxjoystick_new");) post("[linuxjoystick] %s, written by Hans-Christoph Steiner ",version); #ifndef __linux__ post(" !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!"); post(" This is a dummy, since this object only works with a Linux kernel!"); post(" !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!"); #endif /* init vars */ x->x_fd = -1; x->x_read_ok = 1; x->x_started = 0; x->x_delay = DEFAULT_DELAY; x->x_clock = clock_new(x, (t_method)linuxjoystick_read); /* create outlets for each axis */ for (i = 0; i < LINUXJOYSTICK_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); /* set to the value from the object argument, if that exists */ if (s != &s_) x->x_devname = s; /* Open the device and save settings */ if (!linuxjoystick_open(x,s)) return x; return (x); } void linuxjoystick_setup(void) { DEBUG(post("linuxjoystick_setup");) linuxjoystick_class = class_new(gensym("linuxjoystick"), (t_newmethod)linuxjoystick_new, (t_method)linuxjoystick_free, sizeof(t_linuxjoystick),0,A_DEFSYM,0); /* add inlet datatype methods */ class_addfloat(linuxjoystick_class,(t_method) linuxjoystick_float); class_addbang(linuxjoystick_class,(t_method) linuxjoystick_read); /* add inlet message methods */ class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_delay,gensym("delay"),A_DEFFLOAT,0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_open,gensym("open"),A_DEFSYM,0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_close,gensym("close"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_start,gensym("start"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_start,gensym("poll"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_stop,gensym("stop"),0); class_addmethod(linuxjoystick_class,(t_method) linuxjoystick_stop,gensym("nopoll"),0); }