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/* ---------------------------------------------------------------------------- */
/* */
/* MacOS X object to use HIDs (Human Interface Devices) */
/* Written by Hans-Christoph Steiner <hans@at.or.at> */
/* */
/* Copyright (c) 2004 Hans-Christoph Steiner */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* See file LICENSE for further informations on licensing terms. */
/* */
/* This program 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 General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* ---------------------------------------------------------------------------- */
#include "hid.h"
/*------------------------------------------------------------------------------
* LOCAL DEFINES
*/
#define DEBUG(x)
//#define DEBUG(x) x
/*------------------------------------------------------------------------------
* FUNCTION PROTOTYPES
*/
void hid_start(t_hid *x, t_float f);
void hid_stop(t_hid *x);
t_int hid_open(t_hid *x, t_float f);
t_int hid_close(t_hid *x);
t_int hid_read(t_hid *x,int fd);
static void hid_float(t_hid* x, t_floatarg f);
/*------------------------------------------------------------------------------
* SUPPORT FUNCTIONS
*/
void hid_output_event(t_hid *x,
char *type, char *code, t_float value, t_float timestamp)
{
t_atom event_data[4];
SETSYMBOL(event_data, gensym(type)); /* type */
SETSYMBOL(event_data + 1, gensym(code)); /* code */
SETFLOAT(event_data + 2, value); /* value */
SETFLOAT(event_data + 3, timestamp); /* timestamp */
outlet_anything(x->x_obj.te_outlet,atom_gensym(event_data),3,event_data+1);
}
void hid_set_from_float(t_hid *x, t_floatarg f)
{
/* values greater than 1 set the polling delay time */
/* 1 and 0 for start/stop so you can use a [tgl] */
if (f > 1)
{
x->x_delay = (t_int)f;
hid_start(x,f);
}
else if (f == 1)
{
if (! x->x_started)
hid_start(x,f);
}
else if (f == 0)
{
hid_stop(x);
}
}
/*------------------------------------------------------------------------------
* IMPLEMENTATION
*/
/* stop polling the device */
void hid_stop(t_hid* x)
{
DEBUG(post("hid_stop"););
if (x->x_started)
{
clock_unset(x->x_clock);
DEBUG(post("[hid] polling stopped"););
x->x_started = 0;
}
}
/* close the device */
t_int hid_close(t_hid *x)
{
DEBUG(post("hid_close"););
/* just to be safe, stop it first */
hid_stop(x);
if(! hid_close_device(x))
{
post("[hid] closed device %d",x->x_device_number);
x->x_device_open = 0;
return (0);
}
return (1);
}
/* closed / same device open */
/* open / same device no action */
/* closed / different device open */
/* open / different device close open */
t_int hid_open(t_hid *x, t_float f)
{
DEBUG(post("hid_open"););
/* store running state to be restored after the device has been opened */
t_int started = x->x_started;
/* only close the device if its different than the current and open */
if ( (f != x->x_device_number) && (x->x_device_open) )
hid_close(x);
if (f > 0)
x->x_device_number = f;
else
x->x_device_number = 0;
/* if device is open still, that means the same device is trying to be opened,
* therefore ignore the redundant open request. To reopen the same device,
* send a [close( msg, then an [open( msg. */
if (! x->x_device_open)
if (hid_open_device(x,x->x_device_number))
{
error("[hid] can not open device %d",x->x_device_number);
return (1);
}
else
{
x->x_device_open = 1;
}
/* restore the polling state so that when I [tgl] is used to start/stop [hid],
* the [tgl]'s state will continue to accurately reflect [hid]'s state */
if(started)
hid_set_from_float(x,x->x_delay);
return (0);
}
t_int hid_read(t_hid *x,int fd)
{
// DEBUG(post("hid_read"););
hid_get_events(x);
if (x->x_started)
{
clock_delay(x->x_clock, x->x_delay);
}
// TODO: why is this 1?
return 1;
}
void hid_start(t_hid* x, t_float f)
{
DEBUG(post("hid_start"););
/* if the user sets the delay less than one, ignore */
if( f >= 1 )
x->x_delay = (t_int)f;
if(!x->x_device_open)
hid_open(x,x->x_device_number);
if(!x->x_started)
{
clock_delay(x->x_clock, x->x_delay);
DEBUG(post("[hid] polling started"););
x->x_started = 1;
}
}
static void hid_float(t_hid* x, t_floatarg f)
{
DEBUG(post("hid_float"););
hid_set_from_float(x,f);
}
/* setup functions */
static void hid_free(t_hid* x)
{
DEBUG(post("hid_free"););
hid_close(x);
clock_free(x->x_clock);
hid_instance_count--;
hid_platform_specific_free(x);
}
/* create a new instance of this class */
static void *hid_new(t_float f)
{
t_hid *x = (t_hid *)pd_new(hid_class);
DEBUG(post("hid_new"););
/* only display the version when the first instance is loaded */
if(!hid_instance_count)
post("[hid] %d.%d, written by Hans-Christoph Steiner <hans@eds.org>",
HID_MAJOR_VERSION, HID_MINOR_VERSION);
#if !defined(__linux__) && !defined(__APPLE__)
error(" !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!");
error(" This is a dummy, since this object only works GNU/Linux and MacOS X!");
error(" !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !! WARNING !!");
#endif
/* init vars */
x->x_device_open = 0;
x->x_started = 0;
x->x_delay = DEFAULT_DELAY;
x->x_clock = clock_new(x, (t_method)hid_read);
/* create anything outlet used for HID data */
outlet_new(&x->x_obj, 0);
/* find and report the list of devices */
hid_build_device_list(x);
/* Open the device and save settings. If there is an error, return the object
* anyway, so that the inlets and outlets are created, thus not breaking the
* patch. */
if (hid_open(x,f))
error("[hid] device %d did not open",(t_int)f);
hid_instance_count++;
return (x);
}
void hid_setup(void)
{
DEBUG(post("hid_setup"););
hid_class = class_new(gensym("hid"),
(t_newmethod)hid_new,
(t_method)hid_free,
sizeof(t_hid),
CLASS_DEFAULT,
A_DEFFLOAT,0);
/* add inlet datatype methods */
class_addfloat(hid_class,(t_method) hid_float);
class_addbang(hid_class,(t_method) hid_read);
/* add inlet message methods */
class_addmethod(hid_class,(t_method) hid_build_device_list,gensym("refresh"),0);
class_addmethod(hid_class,(t_method) hid_print,gensym("print"),0);
class_addmethod(hid_class,(t_method) hid_open,gensym("open"),A_DEFFLOAT,0);
class_addmethod(hid_class,(t_method) hid_close,gensym("close"),0);
class_addmethod(hid_class,(t_method) hid_start,gensym("start"),A_DEFFLOAT,0);
class_addmethod(hid_class,(t_method) hid_start,gensym("poll"),A_DEFFLOAT,0);
class_addmethod(hid_class,(t_method) hid_stop,gensym("stop"),0);
class_addmethod(hid_class,(t_method) hid_stop,gensym("nopoll"),0);
}
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