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#include <m_pd.h>
#include "linuxhid.h"
#define LINUXEVENT_DEVICE "/dev/input/event0"
static char *version = "$Revision: 1.1 $";
/*------------------------------------------------------------------------------
* CLASS DEF
*/
static t_class *linuxevent_class;
typedef struct _linuxevent {
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_input_event_time_outlet;
t_outlet *x_input_event_type_outlet;
t_outlet *x_input_event_code_outlet;
t_outlet *x_input_event_value_outlet;
}t_linuxevent;
/*------------------------------------------------------------------------------
* IMPLEMENTATION
*/
void linuxevent_stop(t_linuxevent* x) {
DEBUG(post("linuxevent_stop"););
if (x->x_fd >= 0 && x->x_started) {
clock_unset(x->x_clock);
post("linuxevent: polling stopped");
x->x_started = 0;
}
}
static int linuxevent_close(t_linuxevent *x) {
DEBUG(post("linuxevent_close"););
/* just to be safe, stop it first */
linuxevent_stop(x);
if (x->x_fd <0) return 0;
close (x->x_fd);
post ("[linuxevent] closed %s",x->x_devname->s_name);
return 1;
}
static int linuxevent_open(t_linuxevent *x, t_symbol *s) {
int eventType, eventCode, buttons, rel_axes, abs_axes, ff;
#ifdef __gnu_linux__
unsigned long bitmask[EV_MAX][NBITS(KEY_MAX)];
#endif
char devicename[256] = "Unknown";
DEBUG(post("linuxevent_open");)
linuxevent_close(x);
/* set obj device name to parameter
* otherwise set to default
*/
if (s != &s_)
x->x_devname = s;
#ifdef __gnu_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("[linuxevent] open %s failed",x->x_devname->s_name);
x->x_fd = -1;
return 0;
}
} else return 1;
/* read input_events from the LINUXEVENT_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) {
// the API changed at some point...
#ifdef EV_RST
case EV_RST:
#else
case EV_SYN:
#endif
break;
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 linuxevent_read(t_linuxevent *x,int fd) {
if (x->x_fd < 0) return 0;
#ifdef __gnu_linux__
while (read (x->x_fd, &(x->x_input_event), sizeof(struct input_event)) > -1) {
outlet_float (x->x_input_event_value_outlet, (int)x->x_input_event.value);
outlet_float (x->x_input_event_code_outlet, x->x_input_event.code);
outlet_float (x->x_input_event_type_outlet, x->x_input_event.type);
/* input_event.time is a timeval struct from <sys/time.h> */
/* outlet_float (x->x_input_event_time_outlet, x->x_input_event.time); */
}
#endif
if (x->x_started) {
clock_delay(x->x_clock, x->x_delay);
}
return 1;
}
/* Actions */
static void linuxevent_float(t_linuxevent* x) {
DEBUG(post("linuxevent_float");)
}
void linuxevent_delay(t_linuxevent* x, t_float f) {
DEBUG(post("linuxevent_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 linuxevent_start(t_linuxevent* x) {
DEBUG(post("linuxevent_start"););
if (x->x_fd >= 0 && !x->x_started) {
clock_delay(x->x_clock, DEFAULT_DELAY);
post("linuxevent: polling started");
x->x_started = 1;
} else {
post("You need to set a input device (i.e /dev/input/event0)");
}
}
/* setup functions */
static void linuxevent_free(t_linuxevent* x) {
DEBUG(post("linuxevent_free");)
if (x->x_fd < 0) return;
linuxevent_stop(x);
clock_free(x->x_clock);
close (x->x_fd);
}
static void *linuxevent_new(t_symbol *s) {
int i;
t_linuxevent *x = (t_linuxevent *)pd_new(linuxevent_class);
DEBUG(post("linuxevent_new");)
post("[linuxevent] %s, written by Hans-Christoph Steiner <hans@eds.org>",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_devname = gensym(LINUXEVENT_DEVICE);
x->x_clock = clock_new(x, (t_method)linuxevent_read);
/* create outlets for each axis */
x->x_input_event_time_outlet = outlet_new(&x->x_obj, &s_float);
x->x_input_event_type_outlet = outlet_new(&x->x_obj, &s_float);
x->x_input_event_code_outlet = outlet_new(&x->x_obj, &s_float);
x->x_input_event_value_outlet = 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 (!linuxevent_open(x,s)) return x;
return (x);
}
void linuxevent_setup(void) {
DEBUG(post("linuxevent_setup");)
linuxevent_class = class_new(gensym("linuxevent"),
(t_newmethod)linuxevent_new,
(t_method)linuxevent_free,
sizeof(t_linuxevent),0,A_DEFSYM,0);
/* add inlet datatype methods */
class_addfloat(linuxevent_class,(t_method) linuxevent_float);
class_addbang(linuxevent_class,(t_method) linuxevent_read);
/* add inlet message methods */
class_addmethod(linuxevent_class,(t_method) linuxevent_delay,gensym("delay"),A_DEFFLOAT,0);
class_addmethod(linuxevent_class,(t_method) linuxevent_open,gensym("open"),A_DEFSYM,0);
class_addmethod(linuxevent_class,(t_method) linuxevent_close,gensym("close"),0);
class_addmethod(linuxevent_class,(t_method) linuxevent_start,gensym("start"),0);
class_addmethod(linuxevent_class,(t_method) linuxevent_start,gensym("poll"),0);
class_addmethod(linuxevent_class,(t_method) linuxevent_stop,gensym("stop"),0);
class_addmethod(linuxevent_class,(t_method) linuxevent_stop,gensym("nopoll"),0);
}
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