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#include "linuxhid.h"
#define LINUXMOUSE_DEVICE "/dev/input/event0"
#define LINUXMOUSE_AXES 3
static char *version = "$Revision: 1.3 $";
/*------------------------------------------------------------------------------
* CLASS DEF
*/
static t_class *linuxmouse_class;
typedef struct _linuxmouse {
t_object x_obj;
t_int x_fd;
t_symbol *x_devname;
int read_ok;
int started;
struct input_event x_input_event;
t_outlet *x_axis_out[LINUXMOUSE_AXES];
t_outlet *x_button_num_out;
t_outlet *x_button_val_out;
unsigned char x_buttons;
unsigned char x_axes;
} t_linuxmouse;
/*------------------------------------------------------------------------------
* IMPLEMENTATION
*/
/* Actions */
void linuxmouse_stop(t_linuxmouse* x) {
DEBUG(post("linuxmouse_stop"););
if (x->x_fd >= 0 && x->started) {
sys_rmpollfn(x->x_fd);
post("[linuxmouse] stopped");
x->started = 0;
}
}
static int linuxmouse_close(t_linuxmouse *x) {
DEBUG(post("linuxmouse_close"););
/* just to be safe, stop it first */
linuxmouse_stop(x);
if (x->x_fd < 0) {
return 0;
}
else {
close (x->x_fd);
post ("[linuxmouse] closed %s",x->x_devname->s_name);
return 1;
}
}
static int linuxmouse_open(t_linuxmouse *x, t_symbol *s) {
int eventType, eventCode;
unsigned long bitmask[EV_MAX][NBITS(KEY_MAX)];
char devicename[256] = "Unknown";
DEBUG(post("linuxmouse_open"););
linuxmouse_close(x);
/* For some reason, not initializing x->x_devname causes a seg fault */
/* on this object, but it works fine on [linuxevent] */
t_symbol *temp = malloc(20);
temp->s_name = "/dev/input/event0";
x->x_devname = temp;
/* set obj device name to parameter
* otherwise set to default
*/
if (s != &s_) x->x_devname = s;
/* 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("[linuxmouse] open %s failed",x->x_devname->s_name);
x->x_fd = -1;
return 0;
}
} else {
post("[linuxmouse] no device set: %s",x->x_devname->s_name);
return 1;
}
/* read input_events from the LINUXMOUSE_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);
post("\nSupported events:");
/* get bitmask representing supported events (axes, buttons, etc.) */
memset(bitmask, 0, sizeof(bitmask));
ioctl(x->x_fd, EVIOCGBIT(0, EV_MAX), bitmask[0]);
x->x_axes = 0;
x->x_buttons = 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] : "?") : "?");
if ( eventType == EV_KEY )
x->x_buttons++;
else if ( eventType == EV_REL )
x->x_axes++;
}
}
}
}
post ("\nUsing %d axes and %d buttons.", x->x_axes, x->x_buttons);
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");
return 1;
}
static int linuxmouse_read(t_linuxmouse *x,int fd) {
int axis_num = 0;
t_float button_num = 0;
if (x->x_fd < 0) return 0;
while (read (x->x_fd, &(x->x_input_event), sizeof(struct input_event)) > -1) {
if ( x->x_input_event.type == EV_REL ) {
/* Relative Axes Event Type */
switch ( x->x_input_event.code ) {
case REL_X:
axis_num = 0;
break;
case REL_Y:
axis_num = 1;
break;
case REL_WHEEL:
axis_num = 2;
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_LEFT:
button_num = 0;
break;
case BTN_RIGHT:
button_num = 1;
break;
case BTN_MIDDLE:
button_num = 2;
break;
case BTN_SIDE:
button_num = 3;
break;
case BTN_EXTRA:
button_num = 4;
break;
case BTN_FORWARD:
button_num = 5;
break;
case BTN_BACK:
button_num = 6;
break;
}
outlet_float (x->x_button_val_out, x->x_input_event.value);
outlet_float (x->x_button_num_out, button_num);
}
}
return 1;
}
void linuxmouse_start(t_linuxmouse* x) {
DEBUG(post("linuxmouse_start"););
if (x->x_fd >= 0 && !x->started) {
sys_addpollfn(x->x_fd, (t_fdpollfn)linuxmouse_read, x);
post("[linuxmouse] started");
x->started = 1;
} else {
post("You need to set a input device (i.e /dev/input/event0)");
}
}
/* setup functions */
static void linuxmouse_free(t_linuxmouse* x) {
DEBUG(post("linuxmouse_free"););
if (x->x_fd < 0) return;
linuxmouse_stop(x);
close (x->x_fd);
}
static void *linuxmouse_new(t_symbol *s) {
int i;
t_linuxmouse *x = (t_linuxmouse *)pd_new(linuxmouse_class);
DEBUG(post("linuxmouse_new"););
post("[linuxmouse] %s, written by Hans-Christoph Steiner <hans@eds.org>",version);
/* init vars */
x->x_fd = -1;
x->read_ok = 1;
x->started = 0;
/* create outlets for each axis */
for (i = 0; i < LINUXMOUSE_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);
if (!linuxmouse_open(x,s)) return x;
return (x);
}
void linuxmouse_setup(void) {
DEBUG(post("linuxmouse_setup"););
linuxmouse_class = class_new(gensym("linuxmouse"),
(t_newmethod)linuxmouse_new,
(t_method)linuxmouse_free,
sizeof(t_linuxmouse), 0, A_DEFSYM, 0);
/* add inlet message methods */
class_addmethod(linuxmouse_class,(t_method) linuxmouse_open,gensym("open"),A_DEFSYM,0);
class_addmethod(linuxmouse_class,(t_method) linuxmouse_close,gensym("close"),0);
class_addmethod(linuxmouse_class,(t_method) linuxmouse_start,gensym("start"),0);
class_addmethod(linuxmouse_class,(t_method) linuxmouse_stop,gensym("stop"),0);
class_addmethod(linuxmouse_class,(t_method) linuxmouse_start,gensym("poll"),0);
class_addmethod(linuxmouse_class,(t_method) linuxmouse_stop,gensym("nopoll"),0);
}
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